HK1053361A - Electronic apparatus and liquid crystal display device for irradiating ultraviolet ray to luminescent layer - Google Patents

Description

Electronic device and liquid crystal display device for irradiating ultraviolet rays onto light emitting layer

Technical Field

The present invention relates to an electronic device such as a wristwatch, a mobile phone or the like, and also relates to a liquid crystal display device.

Background

As an example, there is a wristwatch including a phosphorescent portion formed by partially applying a luminescent paint or the like to a dial, a hand, or the like of a timepiece. In bright places, the phosphorescent part of the watch can receive outside light, thereby storing energy, and in dark places, the watch can emit light by using the energy stored in the phosphorescent part.

In such a watch, the phosphorescent portion can emit light for a short time in a dark place, so that the time can be recognized. However, the phosphorescent portion cannot emit light when the user desires to emit light, nor can it emit light for a long time.

Therefore, in the prior art, it has been suggested to use a light source to cause the phosphorescent portion to emit light when a user desires to emit light.

As this type of wristwatch, there is a wristwatch in which a light guide plate is disposed under a dial, and a light source is disposed on the side of the light guide plate, and light emitted from the light source is guided to irradiate the lower surface of the dial, and further, there is a wristwatch in which a light source is disposed above the dial.

However, in the former wristwatch described above, there is a problem that light energy cannot be sufficiently stored in a phosphorescent portion provided in the dial or the hand since light from the light source is weak.

Further, in the latter wristwatch described above, although it is possible to sufficiently store light energy in a phosphorescent portion provided in the dial or the hand in the case where the light from the light source is strong, it is practically meaningless to provide the phosphorescent portion since the dial is illuminated by the light from the light source. In addition, there is a problem in arranging the light source in that the arrangement structure is complicated and the light source is not easily installed because the light source should be arranged so that the light source does not cover the dial or the hand and is not broken when being impacted.

Disclosure of Invention

An object of the present invention is to arrange an ultraviolet emitting section so that ultraviolet rays can be properly irradiated onto a light emitting layer without the ultraviolet emitting section becoming an obstacle and breaking when being impacted.

Further, another object of the present invention is to obtain an electronic device or a liquid crystal display device which can realize a backlight function provided for a light emitting layer and has excellent decorativeness.

In addition, another object of the present invention is to efficiently irradiate light in an ultraviolet region emitted from an ultraviolet emitting portion onto a light emitting layer without damaging the light.

In order to achieve the above object, the present invention provides an electronic device, including: a device housing having a window portion; a module, at least a portion of which is disposed in the device housing corresponding to the window portion; a frame-like portion provided between the module and the device case corresponding to a peripheral portion of the window portion; an ultraviolet emitting portion for emitting light in an ultraviolet region, the ultraviolet emitting portion being provided in the frame-like portion; and a light emitting layer for emitting colored light in response to the ultraviolet light emitted from the ultraviolet emitting portion, the light emitting layer being disposed on the at least one portion of the module corresponding to the window portion.

The invention also provides an electronic device, comprising: a device housing having a window portion; a liquid crystal display device disposed in the apparatus casing corresponding to the window portion; an ultraviolet emitting section for emitting light in an ultraviolet region, the ultraviolet emitting section being disposed on a rear surface side of the liquid crystal display device; and a light emitting layer for emitting color light in response to light in an ultraviolet region, the light emitting layer being provided on the liquid crystal display device side.

The present invention also provides a liquid crystal display device, comprising: a liquid crystal element formed by enclosing liquid crystal between a pair of transparent electrode printed circuit boards; an ultraviolet-transmissive upper polarizing plate disposed on an upper surface of the liquid crystal cell; an ultraviolet-transmitting lower polarizing plate disposed on a lower surface of the liquid crystal cell; a reflector disposed at a lower side of the lower polarization plate; and a light emitting layer for emitting colored light in response to light in an ultraviolet region, the light emitting layer being provided on an upper surface of the reflector.

Drawings

Fig. 1 is a side view of the external appearance of a wristwatch to which the present invention is applied;

figure 2 is an enlarged top plan view of the watch case of figure 1;

fig. 3 is an enlarged cross-sectional view of a major portion of the internal structure of the wristwatch in fig. 1;

FIG. 4 is a top view of the watch glass of FIG. 3;

FIG. 5 is an enlarged top view of the dial in FIG. 3;

FIG. 6 is an enlarged top plan view of the pointer of FIG. 3;

fig. 7 is an enlarged cross-sectional view of a luminescent layer provided on the dial in fig. 5;

fig. 8A is a view of a luminescent layer provided on the entire upper surface of the dial;

fig. 8B is a view of a light emitting layer provided on a part of the upper surface of the hand;

FIG. 9 is an enlarged cross-sectional view of an inner main portion of a wristwatch in which a luminescent layer is provided on the lower surfaces of a watch glass and a dial and on the inner surface of a concealing member;

FIG. 10 is an enlarged cross-sectional view of a major part of a watch case in which a watch glass is formed of two glass plates and a luminescent layer is provided between the glass plates;

fig. 11 is an enlarged cross-sectional view of a main portion where a phosphorescent material is mixed in a light emitting layer;

fig. 12 is an enlarged cross-sectional view of a main portion in which a laminated structure composed of a luminescent layer is provided on a dial in a wristwatch according to a second embodiment of the present invention;

fig. 13 is an enlarged sectional view of a main portion in which a light emitting layer in which point-like light emitting portions are arranged in a point-like pattern is provided in a wristwatch according to a third embodiment of the present invention;

fig. 14 is a plan view of a state where ultraviolet rays are irradiated and illuminate the dial in fig. 13;

fig. 15 is an enlarged cross-sectional view of a main portion in which a light emitting layer is provided on an upper surface of a dial as a timepiece part through an inner layer coating film;

fig. 16 is an enlarged cross-sectional view of a main portion of an internal structure of a wristwatch according to a fourth embodiment of the present invention;

FIG. 17 is an enlarged top plan view of the watch of FIG. 16;

FIG. 18A is an enlarged cross-sectional view of a major portion of a construction in which a UV lamp is disposed in a transparent cover;

fig. 18B is an enlarged sectional view of a main portion of a structure in which an ultraviolet lamp is disposed in a space portion formed between a concealing member and an inner surface of a watch case, and ultraviolet rays are irradiated through a space between the concealing portion and the dial plate;

FIG. 19 is an enlarged cross-sectional view of a main part of a structure in which ultraviolet rays from an ultraviolet lamp are reflected by a reflecting surface provided on the lower surface of a watch glass;

fig. 20 is an enlarged cross-sectional view of a main portion of an internal structure of a wristwatch according to a fifth embodiment of the invention;

fig. 21 is an enlarged cross-sectional view of a main portion of an internal structure of a wristwatch according to a sixth embodiment of the invention;

fig. 22 is an external perspective view of a mobile phone according to a seventh embodiment of the present invention;

FIG. 23 is an enlarged sectional view taken along section lines XXIII-XXIII in FIG. 22;

fig. 24A is an enlarged cross-sectional view of a main portion in which a light-emitting material is mixed in a cover glass or a cover glass;

FIG. 24B is an enlarged cross-sectional view of a main portion in which a luminescent material is mixed in a transparent concealing member;

fig. 25 is an enlarged front view of a wristwatch according to an eighth embodiment of the present invention;

FIG. 26 is an enlarged sectional view taken along section lines XXVI-XXVI in FIG. 25;

fig. 27 is an enlarged sectional view of the liquid crystal display device detached from fig. 26;

FIG. 28 is an enlarged cross-sectional view of the watch glass UV reflecting film of FIG. 26;

fig. 29 is a sectional view showing the dimensions of the respective portions in fig. 26.

Detailed description of the preferred embodiments [ first example ]

A first embodiment of the invention applied in a watch is described below with reference to fig. 1 to 7.

Fig. 1 is a side view of a wristwatch, with a portion omitted. Figure 2 is an enlarged top plan view of the watch case of figure 1 without the wristband. Fig. 3 is an enlarged sectional view of a main part of the internal structure of the wristwatch.

The watch comprises a watch case 1 as the device housing. As shown in fig. 2, the bezel 2 is provided on the upper outer periphery of the watch case 1. As shown in fig. 3, a watch glass 3 is mounted in a window portion 1a provided in the upper center of watch case 1 through a seal 4. Furthermore, inside the watch case 1, a dial 5 and a watch module 6 are accommodated. On the lower surface of the watch case 1, a back cover 7 is mounted through a waterproof packing 8. In addition, as shown in fig. 1, a band 9 is attached to the twelve o 'clock side and the six o' clock side of the wristwatch case 1.

The watch module 6 comprises at least an analog function and a digital function. As shown in fig. 3, a hand shaft 10 protrudes above the dial 5, and hands 11 of hour, minute and the like are attached to the upper end of the protruding hand shaft 10 so as to be capable of walking. Further, on the inner peripheral surface of the watch case 1, there is provided a concealing member 12 which is in contact with the upper surface of the peripheral portion of the dial 5 and the lower surface of the peripheral portion of the cover glass 3.

The dial 5 is a circular plate. A through hole 13 through which the hand shaft 10 passes is provided in the central portion of the dial 5. The time scale 14 is provided on the outer periphery of the upper surface of the dial 5, and the hand 11 is moved on the time scale 14 as shown in fig. 5.

Incidentally, the luminescent layer 15 may be provided on the watch-clock parts of the bezel 2, the watch glass 3, the dial 5, the hand 11, the concealing member 12 and the band 9, respectively. As an example, as shown in fig. 4, the light emitting layer 15 is provided on the outer peripheral portion in the upper surface of the watch glass 3 and on a predetermined point in the center of the watch glass 3 (e.g., on the logo portion). Further, as shown in fig. 5, a light emitting layer 15 is provided on a predetermined point in the upper surface of the dial 5 (for example, on the identification portion) and on the upper surface of the time stamp 4. As shown in fig. 6, the light emitting layer 15 is provided on the entire upper surface of the hand 11. In addition, as shown in fig. 1 and 2, a luminescent layer 15 is provided on almost the entire upper surfaces of both the bezel 2 and the band 9.

These light emitting layers 15 emit colored light by reacting to ultraviolet rays having a wavelength of 350 to 420nm (nanometers) or 254 to 365 nm. When not irradiated with light in the ultraviolet region, the light-emitting layer 15 is in a transparent state. As shown in fig. 7, the layer thickness of the light-emitting layer 5 varies in a wave shape. A luminescent layer 15 is applied to the upper surface of each timepiece part (dial 5 is shown in fig. 7) and covered with a transparent outer coating 16. When light in the ultraviolet region is irradiated in this state, a color tone is generated in the emission color based on the layer thickness change. Further, the basic colors of the emission colors of these light emitting layers are green (yellow), blue, red, and can exhibit ten to thirteen color variations. In this case, all the light emission colors of each light emitting layer in each clock part may be the same color. However, in order to easily recognize the time, it is desirable that at least the luminescent colors of the luminescent layers 15 of the dial 5 and the watch glass 3 are not similar to the luminescent color of the luminescent layer 15 of the hand 11. As an example, it is desirable to make the light emitting layer 15 of the hands 11 emit light having a color close to red, while the light emitting layers 15 of the dial 5 and the watch glass 3 emit light having a color close to blue, respectively.

According to this wristwatch, the light-emitting layer 15 provided on each of the timepiece parts, i.e., the bezel 2, the watch glass 3, the dial 5, the hand 11, the concealing member 12 and the band 9, is transparent in places where light in the ultraviolet region hardly strikes, such as indoors or the like. In this way, the surface (material color) of each clock part is not affected by the respective light-emitting layer 15, and therefore the surface of each clock part is just transparent to the line of sight. In addition, in a place that can be irradiated with light in the ultraviolet region, such as outdoors or the like, the transparent light-emitting layer 15 will react to the light in the ultraviolet region and emit colored light. Thus, the glitter can be seen on each of the timepiece components, i.e., the bezel 2, the watch glass 3, the dial 5, the hand 11, the concealing member 12 and the band 9, respectively.

At this time, by making the light emitted from the light-emitting layer 15 of the hand 11 have a color dissimilar to the light emitted from the light-emitting layers 15 of the dial 5 and the watch glass 3, for example, making the light-emitting layer 15 of the hand 11 emit light having a color close to red, and the light-emitting layers 15 of the dial 5 and the watch glass 3 emit light having a color close to blue, respectively, it is possible to easily recognize the time. In particular, as shown in fig. 7, since the layer thickness of each light-emitting layer 15 varies in a wave shape, each light-emitting layer 15 generates a color tone in the light-emitting color based on the variation in the layer thickness, and therefore, a delicate image such as an image in which the tone level or the like varies can be generated, and thus a high decorative effect can be obtained. In this case, since each light emitting layer 15 is protected by covering the transparent overcoat film 15, the durability of each light emitting layer 15 can be improved. In addition, since the light emitting layer 15 does not affect the clock element as the work, the material of each clock element can be freely selected.

In addition, in the first embodiment described above, the luminescent layer 15 is provided partially on the upper surface side of the dial 5, the luminescent layer 15 is provided entirely on the upper surface of the hand 11, and the luminescent layer 15 is provided partially on the upper surface of the watch glass 3. However, it is not limited thereto. For example, as shown in fig. 8A, the light emitting layer 15 may be provided on the entire upper surface of the dial 5. Further, as shown in fig. 8B, the light emitting layer 15 may be provided only on a part of the hands, and the light emitting layer 15 may be provided entirely on the upper surface of the watch glass 3. In this case, the corresponding luminescent layers 15 on the dial 5 and the watch glass 3 may also emit light dissimilar to the luminescent layer 15 of the hand 11. Even if this configuration is made, the same operation and effect as those in the first embodiment are achieved.

Further, in the first embodiment described above, the luminescent layer 15 is provided on the upper surfaces of the watch glass 3 and the dial 5 and on the surface of the concealing member 12, respectively. However, it is not limited thereto. For example, as shown in fig. 9, if the dial is transparent, the luminescent layer 15 may be provided on the lower surface of the dial glass 3 and on the lower surface of the dial 5. Further, if the blinder is transparent, the luminescent layer 15 may be provided on the inner surface of the blinder 12. In addition, as shown in fig. 10, when the cover glass 3 has a structure in which two layers of glass 3a and 3b are superimposed, the light-emitting layer 15 may be sandwiched between the two layers of glass 3a and 3 b. In any of the above structures, the same operation and effect as those in the first embodiment can be achieved.

In addition, in the first embodiment described above, although the case where the respective light emitting layers 15 are formed by changing the layer thickness in a wavy manner has been described, it is not limited thereto. For example, when the light-emitting layer is structured, the layer thickness may be changed in a stepwise manner. Further, as shown in fig. 11, a phosphorescent material 17 may be mixed in the light emitting layer 15. Thus, after the phosphorescent material 17 is mixed, the phosphorescent material 17 can store light energy emitted from the light emitting layer 15. Next, since the phosphorescent material 17 can emit afterglow after the light in the ultraviolet region stops emitting, it has an afterglow function, and thus can also obtain high decorativeness. [ second embodiment ]

A second embodiment of the invention applied in a watch is described below with reference to fig. 12. The same reference numerals are given to the same elements as those in the first embodiment and its respective modified examples shown in fig. 1 to 11 for explaining the second embodiment.

The wristwatch has a structure in which a transparent luminescent layer 20 having a laminated structure is provided on the upper surface of the dial 5. The other structure of the watch is basically the same as that of the first embodiment.

That is, the transparent light emitting layer 20 has a structure in which first to third light emitting films 21 to 23 capable of emitting light having colors dissimilar to each other in response to light in an ultraviolet region are laminated together. The transparent luminescent layer 20 is provided on a predetermined point (e.g., on the logo portion) and/or on the upper surface of the time stamp 14 in the upper surface of the dial 5.

In this case, the first to third light emitting films 21 to 23 respectively emit light rays having colors dissimilar to each other in response to light rays (wavelength of 350 to 420nm) in an ultraviolet region, and are in a transparent state when no light rays in the ultraviolet region are irradiated. The primary colors of the emission colors of these light emitting films 21 to 23 are green (yellow), blue, red, and can exhibit ten to thirteen color variations. For example, the first light-emitting layer 21 emits light having a color close to green (yellow), the second light-emitting layer 22 emits light having a color close to blue, and the third light-emitting layer 23 emits light having a color close to red. Thus, the entire light emitting layer 20 can emit a luminescent color (mixed color) in which the respective luminescent colors emitted from the first to third luminescent films 21 to 23 are mixed. In this case, the light-emitting layer 20 may be covered with a transparent overcoat film 16.

According to this wristwatch, in a place where light in the ultraviolet region is hardly irradiated, such as a room or the like, since the light-emitting layer 20 provided on the dial 5 is transparent, the surface (material color) of the dial 5 is not affected by the light-emitting layer 20, so that the surface of the dial 5 can be just seen through. Further, in a place which can be irradiated with light of ultraviolet region, such as outdoors or the like, since the first to third light-emitting films 21 to 23 respectively react to light of ultraviolet region and emit light of colors dissimilar to each other, and these dissimilar light-emitting colors are mixed together, light having delicate chromaticity can be emitted from the entire light-emitting layer 20. In this way, a predetermined point on the dial 5 can be seen to flash with subtle shades.

At this time, the first to third luminescent films 21 to 23 react differently to different wavelengths or intensities of light in the ultraviolet region, and the respective luminescent colors of the first to third luminescent films 21 to 23 will differ from each other according to the reaction. Therefore, the mixed color of the entire light-emitting layer 20 also changes subtly depending on the wavelength or the intensity of light in the ultraviolet region. Since the light emitting color of the entire light emitting layer 20 is changed according to the wavelength or the intensity of light in the ultraviolet region, the entire light emitting layer 20 can exhibit a subtle color change, so that a high decorative effect can be obtained.

Further, in the second embodiment described above, although the light emitting layer 20 has a three-layer structure, it is not limited thereto. It may also have a two-layer structure, a four-layer or more-layer structure.

Further, in the second embodiment described above, although the luminescent layer 20 is provided on the dial 5, it is not limited thereto. It may also be provided on each timepiece part such as the bezel 2, the crystal 3, the hand 11, the concealing member 12, the band 9 or the like in the same manner as in the first embodiment. In this case, it is also desirable that the luminescent colors (mixed colors) of the luminescent layers 20 of the hands 11 are not similar to the luminescent colors (mixed colors) of the respective luminescent layers 20 of the dial 5 and the watch glass 3.

In addition, also in the second embodiment described above, the phosphorescent material 17 may also be mixed into the light emitting layer 20 in the same manner as the modified example of the first embodiment shown in fig. 11. Thus, after the phosphorescent material 17 is mixed, the phosphorescent material 17 can store light energy emitted from the light emitting layer 20. In addition, since the phosphorescent material 17 can emit afterglow after the light in the ultraviolet region stops emitting, it has afterglow function, and thus can also obtain high decorativeness. [ third embodiment ]

A third embodiment of the invention applied in a wristwatch is described below with reference to fig. 13 and 14. In this case, the same elements as those in the first embodiment and each of its modified examples shown in fig. 1 to 11 are also denoted by the same reference numerals to explain the third embodiment.

The wristwatch has a structure in which a transparent light-emitting layer 25 in which point-like light-emitting portions 26 are arranged is provided on the upper surface of the dial 5. The other structure of the watch is basically the same as that of the first embodiment.

That is, the transparent light emitting layer 25 has a structure in which a plurality of dot-shaped light emitting portions 26 are arranged in dots by printing.

In this case, the dot-shaped light-emitting portions 26 emit light rays having colors dissimilar to each other by reacting to light rays in an ultraviolet region (wavelength of 350 to 420nm), and are in a transparent state when no light rays in the ultraviolet region are irradiated. The basic colors of the light emission color of each dot-like light emission portion 26 are green (yellow), blue, red, and can exhibit ten to thirteen color variations. Further, these dot-like light emitting portions 26 are arranged so that a predetermined pattern of colors, such as the whale pattern shown in fig. 14, can be exhibited by appropriately selecting the light emission color. In this case, each of the dot-shaped light emitting portions 26 in the light emitting layer 25 is covered with a transparent outer cover film 16.

According to this wristwatch, in a place where light in the ultraviolet region is hardly irradiated, such as a room or the like, since each of the point-like light emitting portions 26 in the light emitting layer 25 provided on the dial 5 is transparent, the surface (material color) of the dial 5 is not affected by the light emitting layer 25, so that the surface of the dial 5 can be just seen through. Further, in a place which can be irradiated with light in the ultraviolet region, such as outdoors or the like, the respective dot-shaped light emitting portions 26 in the light emitting layer 25 react to light in the ultraviolet region, respectively, and emit light of a selected color which are dissimilar to each other. Therefore, the whale shown in fig. 14 can be presented in color, so that high decorativeness can be obtained.

Further, in the third embodiment described above, although the luminescent layer 25 is provided on the dial 5, it is not limited thereto. It may also be provided on each timepiece component such as the bezel 2, the crystal 3, the hand 11, the concealing member 12, the band 9 or the like in the same manner as in the first embodiment and the modified examples thereof.

In addition, also in the third embodiment described above, the phosphorescent material 17 may be mixed into the respective dot-shaped light emitting portions 26 of the light emitting layer 25 in the same manner as the modified example of the first embodiment shown in fig. 11. In this way, after the phosphorescent material 17 is mixed, the phosphorescent material 17 in each dot-shaped light-emitting portion 26 can store the light energy emitted into each dot-shaped light-emitting portion 26. Next, since the phosphorescent material 17 can emit afterglow after the light in the ultraviolet region stops emitting, it has an afterglow function, and thus can also obtain high decorativeness.

Further, in the first to third embodiments described above, although the case where each of the light emitting layers 15, 20, and 25 is provided directly on the surface of the clock part has been described, it is not limited thereto. For example, as shown in fig. 15, an inner coating 27 serving as a primer may be provided on the upper surface of the dial 5 as one of the timepiece parts, and respective luminescent layers 15, 20, and 25 may be provided on the upper surface of the inner coating 27. If such a structure is made, since the inner coating layer 27 has a function of a primer, corrosion prevention and adhesion properties can be improved. Thus, although the dial 5 is made of metal or synthetic resin, each of the luminescent layers 15, 20, and 25 can be firmly provided. In this case, although not shown in the drawings, it is desirable to coat a transparent overcoat film 16 on each of the light emitting layers 15, 20 and 25. [ fourth embodiment ]

A fourth embodiment of the invention applied in a wristwatch is described below with reference to fig. 16 and 17. In this case, the same elements as those in the first embodiment and each of its modified examples shown in fig. 1 to 11 are also denoted by the same reference numerals to explain the fourth embodiment.

As shown in fig. 16 and 17, the wristwatch has a structure in which an ultraviolet ray emitting element 30 for emitting ultraviolet rays into the wristwatch case 1 is provided. The other structure of the watch is basically the same as that of the first embodiment.

That is, the ultraviolet emitting element 30 includes a light emitting element such as an ultraviolet lamp (also referred to as a non-visible light source), an ultraviolet emitting diode (LED), or the like to emit ultraviolet rays having a wavelength around 365 nm or 254 to 365 nm. The ultraviolet emitting element constitutes an ultraviolet emitting portion.

Each of the ultraviolet emitting elements 30 is arranged in a concave portion 31 which is a space portion provided in the upper portions of the twelve o 'clock side and the six o' clock side of the blinder 12, respectively. The concealment member 12 is a frame-like member that also includes the function of a protector or a damper. The ultraviolet emitting element 30 emits ultraviolet rays emitted therefrom toward the dial 5 and the hand 11 from obliquely above. The above-mentioned concealing member 12 as a frame member is arranged between the module 6 and the watch case 1 as a device case corresponding to the peripheral portion of the window portion 1 a.

Each ultraviolet-emitting element 30 is arranged in a recess 31 formed in the cover 12, which also contains the function of acting as a protector or damping element in the watch case 1. Therefore, even if an external impact is applied from the direction of the cover glass 3, these ultraviolet-emitting elements 30 are protected or damped by the above-described concealing member 12 including the protecting member or the damping member function. Further, in this example, the vibration damping materials 4a and 4b are arranged on the upper surface and the side surface of the ultraviolet emitting element 30. In this way, the ultraviolet ray emitting element 30 can be further protected from outside impact.

Further, in this example, the switch buttons are provided on the three o 'clock side and the nine o' clock side, and the ultraviolet emitting element 30 is provided in two portions where the switch buttons are not provided, i.e., the twelve o 'clock side and the six o' clock side of the concealing member 12. However, in the case where the switch knob is not provided on the three o 'clock side and the nine o' clock side, these ultraviolet emitting elements may be provided on the three o 'clock side and the nine o' clock side.

In this case, the concave portion 31 of the blinder 12 is disposed between the lower surface of the watch glass 3 and the upper surface of the blinder 12. In this way, the ultraviolet emitting element 30 is disposed at a position further upward than the dial 5 and the hand 11. Further, on the upper surfaces of the dial 5 and the hand 11, light emitting layers 15 for emitting colored light in response to light in the ultraviolet region are provided in the same manner as in the first embodiment, respectively. In this case, the light emitted by the luminescent layer 15 of the dial 5 may not be similar to the light emitted by the luminescent layer 15 of the watch glass 3. Further, as shown in fig. 7, these light emitting layers 15 are also configured to change the layer thickness in a wave shape. Thus, when light in the ultraviolet region is irradiated, a color tone is generated in the emission color due to a change in the layer thickness. As shown in fig. 15, these luminescent layers 15 may be provided on the flat upper surface of the dial 5.

According to this wristwatch, as in the first embodiment, in a place where light in the ultraviolet region is hardly irradiated, such as a room or the like, the corresponding surfaces of the dial 5 and the hand 11 can be seen through the transparent luminescent layer 15. In addition, in a place which can be illuminated by light in the ultraviolet region, such as outdoors or the like, it is possible to see that the dial 5 and the corresponding light emitting layer 15 on the hands 11 are shining. In particular, in a place where light in the ultraviolet region is hardly irradiated, such as a room or the like, when the ultraviolet emitting element 30 is turned on to generate ultraviolet rays, the respective light emitting layers 15 on the dial 5 and the hand 11 react to the ultraviolet rays to emit colored light. In this way, the respective luminescent layers 15 on the dial 5 and the hand 11 can forcibly emit light, and thus the luminescent layers 15 can be freely utilized to emit light at a place where light emission is desired. In this way, when each luminescent layer 15 emits light, as in the first embodiment, the luminescent layer 15 of the dial 5 can emit light dissimilar to the luminescent layer 15 of the hand 11. Therefore, the time can be recognized even in a dark place. In addition, since the layer thickness of each light emitting layer 15 changes in a wave shape and a hue is generated in the emission color based on the layer thickness change, each light emitting layer 15 exhibits a hue in the emission color. Thereby, a higher decorative effect can be obtained.

Further, in this wristwatch, the ultraviolet-ray emitting element 30 is provided in the concealing member 12 between the dial 5 and the dial 3 in correspondence with the peripheral portion of the dial 3. Therefore, the ultraviolet ray emitting element 30 does not shield the dial 5 and the hand 11, and the ultraviolet ray emitting element 30 can be protected by the blinder 12 without being broken by an impact or the like. Further, ultraviolet rays can be appropriately emitted from the ultraviolet ray emitting element 30 between the dial 5 and the watch glass 3. Thus, the ultraviolet rays can be surely and appropriately irradiated on the respective light emitting layers 15 so that the light emitting layers 15 emit sufficient light. In this case, since the ultraviolet-ray emitting element 30 is provided close to the lower surface of the watch glass 3 at the upper portion of the blinder 12, ultraviolet rays can be better irradiated between the dial 5 and the watch glass 3.

In addition, in the fourth embodiment described above, although the luminescent layer 15 is provided on the dial 5 and the hand 11, it is not limited thereto. The luminescent layer 15 may also be provided on each of the timepiece parts such as the bezel 2, the crystal 3, the hand 11, the concealing member 12, the band 9, or the like in the same manner as in the first embodiment and the modified examples thereof.

In addition, in the fourth embodiment described above, although the light emitting layer 15 has a structure in which the layer thickness varies in a wave shape, it is not limited thereto. As an example, the light emitting layer may also be a light emitting layer 20 formed by laminating a plurality of light emitting films 21 to 23 as in the second embodiment, or a transparent light emitting layer 25 in which dot-shaped light emitting portions 26 are arranged in dots as in the third embodiment.

In this case, too, the phosphorescent material 17 may be mixed into the light emitting layers 15, 20 and 25 so as to have an afterglow function in the same manner as the modified example of the first embodiment shown in fig. 11. Thus, the intermittent time of the ultraviolet emitting element 30 which emits light at a constant time can be extended, so that the purpose of reducing power consumption can be achieved.

Further, in the fourth embodiment described above, the ultraviolet emitting elements 30 are provided in two portions, i.e., the twelve o 'clock side and the six o' clock side of the blinder 12. However, the ultraviolet emitting elements 30 may also be provided in three or more portions not equidistantly or equidistantly.

In addition, in the fourth embodiment described above, although the case where the ultraviolet emitting element 30 is disposed on the upper portion of the blinder 12 is described, it is not limited thereto. By way of example, the ultraviolet emitting elements 30 may also be disposed in the concealer 12, as shown in fig. 18A and 18B.

That is, as shown in the modified example in fig. 18A, the concealment member 12 may be made of a transparent material, and the recessed portion 32 may be provided inside the concealment member 12, in which the lower side of the concealment member 32 is open. Next, the ultraviolet emitting element 30 may be disposed in the concave portion 32 through the cutout portion 5a of the dial 5, and the ultraviolet rays generated by the ultraviolet emitting element 30 may be transmitted through the blinder 12 and irradiated to the upper side of the dial 5. Further, as shown in a modified example in fig. 18B, one space portion 33 may be provided between the concealing member 12 and the inner surface of the watch case 1, and one space S may be provided between the lower end portion of the concealing member 12 and the upper surface of the dial 5. Next, the ultraviolet emitting element 30 may be disposed in the space portion 33 through the cutout portion 5a of the dial 5, and the ultraviolet rays generated by the ultraviolet emitting element 30 may be irradiated on the upper side of the dial 5 through the space S between the blinder 12 and the dial 5. In any of the above structures, not only can the same operations and effects as those of the fourth embodiment be achieved, but also the ultraviolet emitting elements 30 can be protected particularly surely by the respective blinders 12.

Further, in the fourth embodiment and its modified examples described above, although the ultraviolet rays generated by the ultraviolet emitting element 30 are directly irradiated on the dial 5 or the hand 11, it is not limited thereto. As an example, as shown in fig. 19, a reflection portion 34 may be provided on the lower surface of the watch glass 3 in the advancing direction of ultraviolet rays, and ultraviolet rays from the ultraviolet ray emitting element 30 may be reflected by the reflection portion 34 and irradiated on the dial 5 or the hand 11. According to this structure, since the ultraviolet rays can be reflected by the reflecting portion 34, the ultraviolet rays from the ultraviolet emitting element 30 can be efficiently irradiated on the dial 5 or the hand 11. [ fifth embodiment ]

A fifth embodiment of the invention applied to a wristwatch is described below with reference to fig. 20. In this case, the same elements as those in the first embodiment and each of its modified examples shown in fig. 1 to 11 are also denoted by the same reference numerals to explain the fifth embodiment.

The watch has a structure in which one watch module 40 includes a digital function. The other structure of the watch is basically the same as that of the first embodiment.

That is, the watch module 40 includes a reflective liquid crystal display device 41 for displaying time or the like information. The watch module 40 is accommodated in the watch case 1 by means of a concealing member 12, as in the first embodiment.

The concealing member 12 is provided on the inner peripheral surface of the watch case 1 in a state that the concealing member is in contact with the upper surface of the peripheral portion of the liquid crystal display device 41 and the lower surface of the peripheral portion of the watch glass 3.

As shown in fig. 20, liquid crystal (not shown) is enclosed between a pair of transparent electrode Printed Circuit Boards (PCBs) 42 and 43 arranged one above another. An ultraviolet transmissive upper polarizing plate 44 is provided on the upper surface of the electrode PCB 42 at the upper side, and an ultraviolet transmissive lower polarizing plate 45 is provided on the lower surface of the electrode PCB 43 at the lower side. Next, the transparent light emitting layer 15 is provided on the entire lower surface of the lower polarizing plate 45, and a reflector 46 is provided on the lower surface of the light emitting layer 15, so that the liquid crystal display device 41 has a reflective structure. In this case, each of the upper and lower polarizing plates 44 and 45 has a structure capable of transmitting at least light in the visible region and light in the ultraviolet region, respectively. That is, the ultraviolet cut-off process may be performed in the general polarizing plate, whereas the ultraviolet cut-off process is not performed in the polarizing plates 44 and 45 in the present embodiment.

Further, the light emitting layer 15 has the same structure as that of the first embodiment shown in fig. 7. That is, it can emit colored light in response to light in the ultraviolet region (wavelength of 350 to 420nm), and is in a transparent state when no light in the ultraviolet region is irradiated. As shown in fig. 7, the light-emitting layer 15 is configured to change the layer thickness in a wave shape. When light in the ultraviolet region is irradiated, a color tone is generated in the emission color due to a change in the layer thickness.

In addition, as in the fourth embodiment, an ultraviolet emitting element 30 for emitting light in the ultraviolet region is provided in the watch case 1. The ultraviolet-emitting element 30 is disposed in the concave portion 31 at the twelve o 'clock side and the six o' clock side upper portions of the concealing member 12 of the watch case 1. The emitted ultraviolet rays are irradiated on the upper surface of the liquid crystal display device 41 from obliquely above.

According to this wristwatch, in a place where light hardly shines in the ultraviolet region, such as a room or the like, external light inputted into the liquid crystal display device 41 is transmitted through the upper polarizing plate 44, the pair of transparent electrode PCBs 42 and 43, and the lower polarizing plate 45. Thus, the rear surface side of the liquid crystal display device 41 can be illuminated by the transmitted external light. Thus, time and the like information can be displayed on the liquid crystal display device 41. Further, in a place which can be irradiated with external light including light in the ultraviolet region, such as outdoors or the like, information of time and the like displayed on the liquid crystal display device 41 can be seen by light other than the ultraviolet region, that is, light in the visible region. In addition, since the upper and lower polarizing plates 44 and 45 may transmit ultraviolet rays, ultraviolet rays included in the external light may be irradiated onto the light emitting layer 15 to cause the light emitting layer 15 to emit colored light, so that information displayed on the liquid crystal display device 41 may be viewed by the emitted colored light serving as background light. At this time, since the layer thickness of the light emitting layer 15 changes in a wave shape and a hue is generated in the emission color based on the change in the layer thickness, each light emitting layer 15 exhibits a hue in the emission color. Thereby, a higher decorative effect can be obtained.

Further, in a dark place where ultraviolet rays are hardly irradiated, such as a room or the like, the ultraviolet emitting element 30 may be turned on to generate ultraviolet rays, as described above, and at this time, since the upper polarizing plate 44 and the lower polarizing plate 45 may transmit ultraviolet rays, ultraviolet rays may be transmitted through the upper polarizing plate 44, the pair of transparent electrode PCBs 42 and 43, the lower polarizing plate 45, and irradiated onto the light emitting layer 15. Thus, the light emitting layer 15 emits color light in response to ultraviolet rays. Therefore, the light-emitting layer 15 can forcibly emit light, and thereby the light-emitting layer 15 can be freely utilized to emit light at a place where light emission is desired. Since the light emitting layer 15 functions as a backlight, information displayed on the liquid crystal display device 41 can be viewed by means of colored light emitted from the light emitting layer 15 even in a dark place where light in the ultraviolet region is hardly irradiated.

Therefore, according to this wristwatch, the ultraviolet-emitting element 30 is provided in the concealing member 12 between the liquid crystal display device 41 and the watch glass 3 in correspondence with the peripheral portion of the watch glass 3. Thus, as in the fourth embodiment, the ultraviolet emitting element 30 does not block the display contents on the liquid crystal display device 41, and in addition, the ultraviolet emitting element 30 can be protected by the blinder 12 without being broken by an impact or the like. Further, ultraviolet rays can be appropriately emitted from the ultraviolet emitting element 30 between the liquid crystal display device 41 and the cover glass 3. Therefore, light in the ultraviolet region can be irradiated on the light emitting layer 15 to cause the light emitting layer 15 to emit light appropriately.

Further, in the fifth embodiment described above, although the ultraviolet emitting elements 30 are provided in two portions, i.e., the twelve o 'clock side and the six o' clock side of the blinder 12, it is not limited thereto. For example, the ultraviolet light emitting elements 30 may also be provided in three or more portions at non-equal intervals or at equal intervals. Further, it is not always necessary to dispose the ultraviolet ray emitting element 30 at the upper portion of the blinder 12. As a modified example of the fourth embodiment shown in fig. 18A, the ultraviolet emitting element 30 may be disposed in a concave portion 32 provided in the transparent blinder 12, and ultraviolet rays may be irradiated to the upper surface side of the liquid crystal display device 41 through the blinder 12. Further, as in the modified example of the fourth embodiment shown in fig. 18B, the ultraviolet emitting element 30 may be arranged in the space portion 33 provided between the concealing member 12 and the inner surface of the watch case 1, and ultraviolet rays may be irradiated to the upper surface side of the liquid crystal display device 41 through the space S between the concealing member 12 and the liquid crystal display device 41. With this structure, not only can the same operations and effects as those of the fifth embodiment be achieved, but also the ultraviolet emitting elements 30 can be protected particularly surely by the respective blinders 12.

In addition, in the fifth embodiment described above, although the layer thickness of the light-emitting layer 15 varies in a wave shape, it is not limited thereto. As an example, the light emitting layer may be a light emitting layer 20 formed by laminating a plurality of light emitting films 21 to 23 as shown in the second embodiment, or it may be a transparent light emitting layer 25 in which dot-shaped light emitting portions 26 are arranged in dots as shown in the third embodiment. In this case, as in the modified example of the first embodiment shown in fig. 11, it is also possible to mix the phosphorescent material 17 into the light emitting layers 15, 20 and 25 so as to realize the afterglow function using the phosphorescent material 17 in each of the light emitting layers 15, 20 and 25. Thus, the intermittent time of the ultraviolet emitting element 30 which emits light at a constant time can be extended, so that the purpose of reducing power consumption can be achieved.

Further, in the fifth embodiment described above, although the light emitting layers 15, 20, and 25 are provided on the lower surface of the lower polarizing plate 45 of the liquid crystal display device 41, it is not limited thereto. The light emitting layers 15, 20, and 25 may also be provided on the upper surface of the liquid crystal display device 41. In this case, the light emitting layers 15, 20, and 25 may be provided locally at positions that do not block time and the like displayed on the liquid crystal display device 41.

Further, in the fifth embodiment described above, although the light emitting layers 15, 20, and 25 are provided on the liquid crystal display device 41, it is not limited thereto. The luminescent layers 15, 20, and 25 may also be provided on each of the timepiece parts such as the bezel 2, the crystal 3, the concealing member 12, the band 9, or the like in the same manner as in the first embodiment and its modified examples. [ sixth embodiment ]

A sixth embodiment of the invention applied to a wristwatch is described below with reference to fig. 21. In this case, the same elements as those in the fifth embodiment and its respective modified examples shown in fig. 20 are also denoted by the same reference numerals to explain the sixth embodiment.

The wristwatch has a structure in which a watch module 40 includes a transmissive liquid crystal display device 50 and an ultraviolet-ray emitting device 51 disposed below the liquid crystal display device 50. The other structure of the wristwatch is basically the same as that of the fifth embodiment.

That is, in the liquid crystal display device 50, as in the fifth embodiment, a liquid crystal (not shown) is enclosed between a pair of transparent electrode Printed Circuit Boards (PCBs) 42 and 43 arranged one above another. An upper polarization plate 44 is provided on the upper surface of the electrode PCB 42 at the upper side, and a lower polarization plate 45 is provided on the lower surface of the electrode PCB 43 at the lower side. Further, the transparent light emitting layer 15 is provided on the entire lower surface of the lower polarizing plate 45. In this case, the light emitting layer 15 emits color light in response to ultraviolet rays, and the layer thickness thereof changes in a wave shape, as in the fifth embodiment.

Further, the ultraviolet emitting device 51 includes a diffuser 52 corresponding to the lower surface of the liquid crystal display device 50 and an ultraviolet emitting element 30 disposed below the diffuser 52. The ultraviolet rays generated by the ultraviolet emitting element 30 are diffused in the diffuser 52 and almost uniformly irradiated on the light emitting layer 15 located on the lower surface of the liquid crystal display device 50.

According to such a wristwatch, in a place which can be hit by light in the ultraviolet region, such as outdoors or the like, the light emitting layer 15 provided on the lower surface of the liquid crystal display device 50 will emit colored light and function as a backlight, so that information displayed on the liquid crystal display device 50 can be viewed by means of the emitted colored light functioning as background light. Further, in a dark place where light in the ultraviolet region is hardly irradiated, such as a room or the like, the ultraviolet emitting element 30 in the ultraviolet emitting device 51 may be turned on to generate ultraviolet rays, which are diffused by the diffuser 52 and almost uniformly irradiated on the light emitting layer 15 located on the lower surface of the liquid crystal display device 50. In this way, the light emitting layer 15 emits color light in response to ultraviolet rays, and therefore the light emitting layer 15 can be used as a backlight even in a dark place, so that information displayed on the liquid crystal display device 50 can be viewed by the emitted color light used as background light.

In this way, in this wristwatch, since the light-emitting layer 15 can be caused to forcibly emit light by turning on the ultraviolet-emitting element 30 in the ultraviolet-emitting device 51, the light-emitting layer 15 can be freely used to emit light at a place where light emission is desired, so that information displayed on the liquid crystal display device 50 can be viewed. In addition, when the light-emitting layer 15 emits light, the layer thickness of the light-emitting layer 15 changes in a wave shape, and a color tone is generated in the emission color due to the change in the layer thickness, so that the light-emitting layer 15 exhibits a color tone in the emission color. Thereby, a higher decorative effect can be obtained.

Further, in the sixth embodiment described above, although the ultraviolet emitting device 51 has a structure in which the ultraviolet emitting element 30 is disposed below the diffuser 52, it is not limited thereto. A light guide plate may be disposed on the lower surface of the liquid crystal display device 50 and the ultraviolet ray emitting elements 30 may be disposed in the outer peripheral portion of the light guide plate. Thus, the ultraviolet rays from the ultraviolet ray emitting elements 30 can be guided by the light guide plate to be almost uniformly irradiated from the upper surface of the light guide plate onto the lower surface of the liquid crystal display device 50.

Further, in the sixth embodiment described above, although the light emitting layer 15 is provided on the entire lower surface of the liquid crystal display device 50, it is not limited thereto. As an example, the light emitting layer 15 may be provided locally at a portion that does not block time and the like displayed on the liquid crystal display device 50. Further, if the wristwatch has a structure including a backlight device for the liquid crystal display device 50 in addition to the ultraviolet ray emitting device 51, the light emitting layer 15 may be provided on the upper surface of the liquid crystal display device 50.

In addition, in the sixth embodiment described above, although the layer thickness of the light-emitting layer 15 varies in a wave shape, it is not limited thereto. As an example, the light emitting layer may be a light emitting layer 20 formed by laminating a plurality of light emitting films 21 to 23 as shown in the second embodiment, or it may be a transparent light emitting layer 25 in which dot-shaped light emitting portions 26 are arranged in dots as shown in the third embodiment. In this case, as in the modified example of the first embodiment shown in fig. 11, it is also possible to mix the phosphorescent material 17 into the light emitting layers 15, 20 and 25 so as to realize the afterglow function using the phosphorescent material 17 in each of the light emitting layers 15, 20 and 25. Thus, the intermittent time of the ultraviolet emitting element 30 which emits light at a constant time can be extended, so that the purpose of reducing power consumption can be achieved.

Further, in the fourth to sixth embodiments and the modified examples described above, the ultraviolet region light included in the external light is input through the watch glass 3. However, in order to prevent the input of ultraviolet rays, an ultraviolet reflecting film may be provided on the upper surface of the watch glass 3 to reflect light rays in the ultraviolet region. Thus, each of the luminescent layers 15, 20 and 25 in the watch case 1 does not emit light in response to the external light because the ultraviolet reflecting film on the watch glass 3 will reflect the light in the ultraviolet region from the outside. The light emitting layers 15, 20, and 25 emit color light in response to only ultraviolet rays from the ultraviolet ray emitting element 30, and in addition, the ultraviolet ray reflecting film may reflect ultraviolet rays from the ultraviolet ray emitting element 30 in the watch case 1. Therefore, ultraviolet rays can be efficiently irradiated on the light emitting layers 15, 20, and 25. [ seventh embodiment ]

A seventh embodiment of the present invention applied to a mobile phone is described below with reference to fig. 22 and 23. In this case, the same elements as those in the fifth embodiment and its respective modified examples shown in fig. 20 are also denoted by the same reference numerals to explain the seventh embodiment.

Fig. 22 is an external perspective view of the mobile phone. Fig. 23 is an enlarged sectional view taken along section lines XXIII-XXIII in fig. 22. As shown in fig. 22, the mobile phone includes a device case 60 made of synthetic resin, and the device case 60 is a structure formed by connecting an upper case 61 and a lower case 62.

On the upper surface of the device case 60, that is, the upper surface of the upper case 61, a cover glass 63 is mounted in a window portion provided on the upper portion side, and the upper surface is also provided with respective keys 64 required for the telephone function. Further, on the side surface of the upper portion side of the device case 60, an antenna 65 is connected. The antenna 65 may be pulled out and pushed into the device housing 60. In addition, as shown in fig. 23, a telephone module 66 is accommodated inside the device case 60. The module 66 includes various elements necessary for implementing the telephone function, such as the liquid crystal display device 41 and the like. The structure of the liquid crystal display device 41 is the same as that of the fifth embodiment in fig. 20. The liquid crystal display device is disposed by a concealing member 67 as a frame member or a frame portion so as to correspond to the lower side of the cover glass 63.

That is, as shown in fig. 23, polarizing plates 44 and 45 are provided on upper and lower surfaces of a pair of transparent PCBs 42 and 43, respectively. A light emitting layer 15 capable of emitting color light in response to light in the ultraviolet region is provided on the entire lower surface of the lower polarizing plate 45. Further, a reflector 46 is provided on the lower surface of the light-emitting layer 15. Thus, the liquid crystal display device 41 is constructed. As in the first embodiment, the layer thickness of the light-emitting layer 15 varies in a wave shape. The concealing member 67 has a vibration damping function, and is provided on the inner surface of the apparatus casing 60 in a state of contacting the upper surface of the peripheral portion of the liquid crystal display device 41. In the concealing member 67, concave portions 68 facing each other are provided. In these concave portions 68, ultraviolet emitting elements 30 for generating ultraviolet rays are disposed, respectively. The ultraviolet emitting element 30 irradiates ultraviolet rays generated therefrom onto the upper surface of the liquid crystal display device 41 from obliquely above.

According to such a mobile phone, in a place where light of an ultraviolet region hardly hits, such as a room or the like, external light inputted into the liquid crystal display device 41 is transmitted through the upper polarizing plate 44, the pair of transparent electrode PCBs 42 and 43, and the lower polarizing plate 45. Thus, the rear surface side of the liquid crystal display device 41 can be illuminated by the transmitted external light. Thus, time and the like information can be displayed on the liquid crystal display device 41. Further, in a place which can be irradiated with light in the ultraviolet region, such as outdoors or the like, the light-emitting layer 15 provided on the lower surface of the liquid crystal display device 41 emits color light, so that information displayed on the liquid crystal display device 41 can be viewed by the emitted color light serving as background light. Thus, when the light emitting layers 15 emit light, the layer thickness of the light emitting layers 15 changes in a wave shape, and a color tone is generated in the emission color based on the change in the layer thickness, so that each light emitting layer 15 exhibits a color tone in the emission color. Thereby, a higher decorative effect can be obtained.

Further, in such a mobile phone, in a dark place where light in an ultraviolet region is hardly irradiated, such as a room or the like, the ultraviolet emitting element 30 may be turned on to generate ultraviolet rays, and the light emitting layer 15 may react to the ultraviolet rays to emit colored light. Therefore, the light-emitting layer 15 can forcibly emit light, and thereby the light-emitting layer 15 can be freely utilized to emit light at a place where light emission is desired. Since the light emitting layer 15 functions as a backlight, information displayed on the liquid crystal display device 41 can be viewed by means of colored light emitted from the light emitting layer 15 even in a dark place where light in the ultraviolet region is hardly irradiated.

Thus, according to this mobile phone, the ultraviolet emitting element 30 is provided in the concealing member 67 between the liquid crystal display device 41 and the cover glass 63 in correspondence with the peripheral portion of the cover glass 63. Therefore, as in the fifth embodiment, the ultraviolet emitting element 30 does not block the display contents on the liquid crystal display device 41, and in addition, the ultraviolet emitting element 30 can be protected by the concealing member 67 without being broken by an impact or the like. Further, ultraviolet rays can be appropriately emitted from the ultraviolet emitting element 30 between the liquid crystal display device 41 and the protective glass 63. Therefore, light in the ultraviolet region can be irradiated on the light emitting layer 15 so that the light emitting layer 15 emits sufficient light.

Further, in the seventh embodiment described above, although the ultraviolet emitting elements 30 are provided in two portions of the blinders 67 facing each other, it is not limited thereto. The ultraviolet light emitting elements 30 may also be provided in three or more portions with non-equal spacing or with equal spacing. Further, it is not always necessary to dispose the ultraviolet emitting element 30 on the upper portion of the blinder 67. As in the modified example of the fourth embodiment shown in fig. 18A, the concave portion 32 may be provided in the concealing member 67, and the ultraviolet emitting element 30 may be arranged in the concave portion 32. Further, as in the modified example of the fourth embodiment shown in fig. 18B, the ultraviolet emitting element 30 may be arranged in the space portion 33 provided between the concealing member 67 and the inner surface of the device case 60. With this structure, not only can the same operations and effects as those of the seventh embodiment be achieved, but also the ultraviolet-emitting elements 30 can be protected particularly surely by the respective blinders 67.

In addition, in the seventh embodiment described above, although the light emitting layer 15 is provided on the entire lower surface of the liquid crystal display device 41, it is not limited thereto. The light emitting layer 15 may be provided locally at a portion where time and the like displayed on the liquid crystal display device 41 are not blocked. Further, the light emitting layer 15 is not necessarily provided on the lower surface of the liquid crystal display device 41. The light emitting layer 15 may also be provided on the upper surface of the liquid crystal display device 41.

Further, in the seventh embodiment described above, although the layer thickness of the light-emitting layer 15 varies in a wave shape, it is not limited thereto. As an example, the light emitting layer may be a light emitting layer 20 formed by laminating a plurality of light emitting films 21 to 23 as shown in the second embodiment, or it may be a transparent light emitting layer 25 in which dot-shaped light emitting portions 26 are arranged in dots as shown in the third embodiment. In this case, as in the modified example of the first embodiment shown in fig. 11, it is also possible to mix the phosphorescent material 17 into the light emitting layers 15, 20 and 25 so as to realize the afterglow function using the phosphorescent material 17 in each of the light emitting layers 15, 20 and 25. Thus, the intermittent time of the ultraviolet emitting element 30 which emits light at a constant time can be extended, so that the purpose of reducing power consumption can be achieved.

In addition, in the seventh embodiment and its modified examples described above, although the case where the liquid crystal display device 41 is of the reflective type is described, it is not limited thereto. The same transmissive liquid crystal display device 50 as in the sixth embodiment shown in fig. 21 may also be used. In this case, an ultraviolet emitting device 51 including a diffuser 52 and the ultraviolet emitting element 30 may be provided under the liquid crystal display device 50. Further, the light emitting layers 15, 20, and 25 do not necessarily emit light by means of the ultraviolet emitting element 30. The light emitting layers 15, 20, and 25 may emit light only with ultraviolet region light included in the external light.

Further, although the light emitting layers 15, 20, and 25 are provided in the liquid crystal display device 41 in the seventh embodiment described above, it is not limited thereto. The luminescent layers 15, 20, and 25 may also be provided on each of the telephone parts, such as the device case 60, the cover glass 63, various keys 64, the antenna 65, the concealing member 67, and the like.

In addition, in the first to seventh embodiments and the respective modified examples described above, the light emitting layers 15, 20, and 25 are provided on the clock part and the telephone part. However, an ultraviolet-ray emitting material for emitting color light in response to ultraviolet rays may be mixed in each of the clock parts and the telephone parts as long as these parts are transparent members. In addition, a phosphorescent material may be mixed in the ultraviolet-emitting material. As an example, as shown in fig. 24A, a luminescent material 70 such as an ultraviolet-emitting material, a phosphorescent material, or the like may be mixed in the cover glass 3 or the cover glass 63. Further, as shown in fig. 24B, if the blinders 12 and 67 are transparent, a luminescent material 70 such as an ultraviolet ray emitting material, a phosphorescent material, or the like may be mixed in the blinders 12 and 67.

In addition, in the first to seventh embodiments and the respective modified examples described above, although the case where the present invention is applied to the wristwatch and the mobile phone is described, the present invention is not limited thereto, and the present invention can be widely applied to various electronic devices such as an electronic organizer, an electronic dictionary, a portable terminal, a personal computer, a printer, and the like, and also can be applied to an automobile, a meter, or the like, various apparatuses, or parts thereof.

Further, in the first to seventh embodiments and the respective modified examples described above, the case where the ultraviolet light emitting element 30 is provided in the frame-like member or the concealing member so as to protect or damp the ultraviolet light emitting element 30 is described. However, a frame-like portion projecting into the inside may be provided at a position corresponding to a window portion of the watch case or the device case, and the ultraviolet-ray emitting element 30 may be provided in the frame-like portion. [ eighth embodiment ]

An eighth embodiment of the present invention applied to an electronic watch is described below with reference to fig. 25 to 29. In this case, the same elements as those in the fourth and fifth embodiments shown in fig. 16 to 20 are also denoted by the same reference numerals to explain the eighth embodiment.

As is clear from the plan view in fig. 25 and the sectional view taken along the sectional line XXVI-XXVI in fig. 25 in fig. 26, the electronic wristwatch includes a watch module 80 including an analog functional element having a hand and a digital functional element having a time display portion that displays time using liquid crystal in the watch case 1. An ultraviolet emitting element 81 is provided in the watch case 1, and an ultraviolet reflecting film 82 is provided on the lower surface of the watch glass 3 corresponding to the window portion on the watch case 1. The other structure of the electronic watch is basically the same as that in the fourth and fifth embodiments.

In this case, the bezel 2 is provided on the outer peripheral portion of the watch case 1 so as to cover the upper portion of the watch case 1. A ring 2a made of stainless steel or the like is provided between the bezel 2 and the upper part of the watch case 1. A bezel ring 2b made of stainless steel or the like is fixed to the outer peripheral portion of the bezel 2. Furthermore, a glass 3 is mounted on the upper part of the watch case 1 by a seal 4. A back cover 7 is mounted on the lower surface of the watch case 1 through a waterproof packing 8.

The watch module 80 includes a housing 83 that houses both analog and digital functions. The cover 83 is accommodated in the reinforcing frame 84 through a concealing member 12 so as to be accommodated in the watch case 1 in this state.

The analog functional elements of the table module 80 are the same as in the fourth embodiment. A hand shaft 10 protrudes above the dial 5, and hands 11 of hour, minute and the like are attached to the upper end of the protruding hand shaft 10 so as to be capable of walking. In this case, the dial 5 is a circular plate. A through hole 13 through which the hand shaft 10 passes is provided in the central portion of the dial 5. The time mark 14 and a display opening portion 85 are provided on the outer periphery of the upper surface of the dial 5. Further, light emitting layers 15 are provided on predetermined points (identification portions) in the upper surface of the dial 5, on the upper surface of the pointer 11, and on the upper surface of the blinder 12, respectively.

In addition, the digital function of the watch module 80 includes a reflective liquid crystal display device 86 for displaying time or the like information. The liquid crystal display device 86 is disposed corresponding to the lower side of the display opening portion 85. As shown in fig. 27, in a liquid crystal display device 86, an upper polarizing plate 44 capable of transmitting light in the ultraviolet region as well is provided on the upper surface of a liquid crystal cell 87, the liquid crystal cell 87 having a pair of transparent electrode PCBs 42 and 43 arranged one above another and enclosing a liquid crystal (not shown). A lower polarizing plate 45 capable of transmitting light in the ultraviolet region is also provided on the lower surface of the liquid crystal cell 87 of the liquid crystal display device 86. A reflector 46 is provided on the lower side of the lower polarizing plate 45, and the luminescent layer 15 is provided on the upper surface of the reflector 46. Thus, the liquid crystal display device 86 has the same reflection function as in the fifth embodiment. In this case, as in the fifth embodiment, each of the polarizing plates 44 and 45 can transmit at least visible-region light and ultraviolet-region light, and thus its structure does not perform the ultraviolet cut-off process as the ordinary polarizing plate does.

Each of the ultraviolet light emitting elements 81 includes a light emitting element such as an ultraviolet Light Emitting Diode (LED) or the like, which is called a source of invisible light, to emit near ultraviolet light (UV-a) having a wavelength of 365 to 400nm, preferably 350 to 380 nm. Each ultraviolet-emitting element 81 is arranged in one concave portion 31, respectively, which is a space portion provided in the upper portions of the three o 'clock side and the nine o' clock side of the blinder 12, the blinder 12 also having a function as a protector or a damper in the watch case 1. That is, the ultraviolet emitting element 81 is disposed between the blinder 12 and the cover glass 3. So that it is arranged at a position further up than the dial 5 and the hand 11.

Further, the ultraviolet light emitting element 81 includes a pair of battery terminals 88. Each battery terminal 88 is inserted through the concealing member 12 into a through hole in the dial 5. The lower end of each of the inserted battery terminals 88 is in elastic contact with a corresponding one of a pair of switch springs 90 for connection, which are provided on a circuit board 89 in the cover 83. Thus, the battery terminal 88 is electrically connected to the circuit board 89. That is, each of the connection switch springs 90 is bent in an L-shape. The upper portion of each switch spring 90 is bent into an inverted U-shape, and after bending, the lower end portion of the inverted U-shape may elastically contact the surface of one battery terminal 88 of the corresponding ultraviolet light emitting element 81 and slide in the up-and-down direction. Thus, even if the wristwatch case 1 is subjected to an impact from the outside, the ultraviolet-ray emitting element 81 can absorb such an impact because the battery terminal 88 elastically contacts the switch spring 90.

The ultraviolet reflection film 82 located on the lower surface of the watch glass 3 can reflect the ultraviolet ray emitted from the ultraviolet emitting element 81 disposed in the watch case 1 and transmit the light other than the ultraviolet ray. The ultraviolet reflecting film is a transparent film which prevents the transmission of the watch glass3, but can transmit light except for the ultraviolet region light among the external light inputted. As shown in fig. 28, the ultraviolet reflecting film 82 has a structure composed of first and second evaporation layers 91 and 92 which are made of different materials and are alternately laminated together. That is, in the ultraviolet reflection film 82, the first evaporation layer 91 is made of titanium dioxide (TiO)₂) Titanium nitride (TiN), or the like, and the second evaporation layer 92 is made of silicon dioxide (SiO)₂) Silicon nitride (Si)₃N) or the like, and the second evaporation layer 92 is deposited on the lower surface of the cover glass 3 by evaporation. After that, the first evaporation layer 91 is deposited on the lower surface of the second evaporation layer 92 by evaporation. Then, the second evaporation layer 92 is redeposited onto the lower surface of the first evaporation layer 91. Finally, the ultraviolet reflection film 81 has a structure in which the first and second evaporation layers 91 and 92 having about 22 layers in total are laminated together by repeating the above deposition operation.

In this case, the first evaporation layer 91 is made of titanium dioxide (TiO)₂) Made of silicon dioxide (SiO) and the second evaporation layer 92₂) In the case of manufacturing, the strength of the reflective film is high, and the strength against expansion and contraction stress of the first evaporation layer 91 made of titanium dioxide is high, and the strength against contraction stress of the second evaporation layer 92 made of silicon dioxide is high. Therefore, the combination of the above effects can result in extremely high crack resistance, so that the generation of cracks due to stress deviation in the reflective film can be prevented. Further, the number of the first and second evaporation layers 91 and 92 may be about 18 to 25, and preferably 22. In addition, the thickness of the entire ultraviolet reflecting film 82 is about 1.075 μm, and further, the thicknesses of the first and second evaporation layers 91 and 92, which are formed as thin films, are about 0.049 μm, respectively.

Such an ultraviolet reflecting film 82 can reflect 70 to 90% of the ultraviolet ray emitted from the ultraviolet emitting element 81 and cut off not less than 90% of the light having a wavelength of not more than 300nm among the external ultraviolet ray inputted through the watch glass 3. Preferably, about 98% of light having a wavelength of not more than 400nm is cut off. Further, the watch glass 3 on which the ultraviolet reflection film 82 is formed can transmit therethrough not less than 92% of light other than ultraviolet-region light (wavelength in the range of 400nm to 720 nm) vertically input through the watch glass 3, for example, visible-region light. The average value of the transmittance was not less than 93.5%, which was high. The transmittance of the surface glass thus configured can be improved as compared with the case where the ultraviolet reflecting film 82 is not provided.

On the other hand, as in the first embodiment, the light emitting layers 15 provided on the reflector 46, the time stamp 14, the hand 11, the concealing member 12, and the liquid crystal display device 86 of the dial 5, respectively, emit color light in the visible region by reacting to light in the ultraviolet region, and are transparent when light in the ultraviolet region is not emitted. That is, electrons are converted from a ground state to a high energy state, so that the additive contained in the ink pigment absorbs energy in light in the ultraviolet region, and then the electrons return to a stable energy level. Thus, the light emitting layer 15 will emit light. Each emission color (emission wavelength) depends on the wavelength of light generated by the above-mentioned additive, and thus the color varies from additive to additive. Thus, the primary colors of the emission colors of each light-emitting layer 15 are blue, green (yellow), red, and can exhibit ten to thirteen color variations. In this case, the light emitting layers 15 provided on the reflector 46, the time stamp 14, the hand 11, the concealing member 12, and the liquid crystal display device 86 of the dial 5 may all emit light of the same color. However, in order to easily recognize the time, it is desirable that at least the dial 5 and the hands 11 emit lights of different colors.

In this case, the light-emitting layers 15, particularly the light-emitting layers 15 provided on the timing mark 14 and the concealing member 12, may be configured such that their light emission amounts gradually increase as the distances from the respective ultraviolet-ray emitting elements 81 increase. As an example, the amount of light emitted by the light-emitting layer 15 on each timing mark 14 may be different such that the wavelength of light emitted by each light-emitting layer gradually decreases as it goes away from the corresponding ultraviolet-ray emitting element 81. That is, in the case where the emission amount of light in the ultraviolet region is kept constant, the light emission amount is smaller as the wavelength of light from the light emitting layer 15 is longer, and conversely, the light emission amount is larger as the wavelength of light is shorter. Thus, the light emission color of each light emitting layer 15 in the vicinity of the corresponding ultraviolet light emitting element 81 is a color close to red, which is longer in wavelength, and as the light emitting layer 15 is farther from the ultraviolet light emitting element 81, their light emission colors sequentially change to a color close to green and a color close to blue as the wavelength is gradually shortened.

Incidentally, the electronic watch is structured in the size shown in fig. 29. That is, the watch case 1 has an outer dimension of about 41.0mm and an inner width of about 28.6 mm. The upper internal diameter of watch case 1 is about 27.5 mm. The outer diameter of the watch glass 3 is about 26.5mm, and the thickness from the upper surface of the watch glass 3 to the lower surface of the rear cover 7 is about 12.8 mm. The distance from the lower surface of the watch glass 3 to the upper surface of the dial 5 is about 2.45 mm. The dial thickness is about 0.6mm and the thickness of the liquid crystal display device 86, that is, the distance from the lower surface of the dial 5 to the circuit board 89 in the case 83 is about 2.3 mm. Further, the distance from the outer side surface of the watch case 1 to the center of the hand shaft 10 is about 21.2 mm. In the hands 11, the hour hand is about 7.5mm in length, and the minute hand and the second hand are each about 10.5mm in length. The distance from the center of the hand shaft 10 to each ultraviolet-ray emitting element 81 was about 11.85mm, and the height from the light-emitting center portion of each ultraviolet-ray emitting element 81 to the dial 5 was about 1.65 mm. The clearance from the lower surface of the dial 5 to the upper end of each switch spring 90 is about 0.5 mm. Further, in the first to seventh embodiments and the respective modified examples, too, the same size as in the present example is provided.

According to this electronic wristwatch, in a bright place such as outdoors or the like, since light in the ultraviolet region among external light inputted from the outside through the watch glass 3 is cut off by the ultraviolet reflecting film 82 provided on the watch glass 3, harmful light, particularly light of short wavelength such as middle ultraviolet (UV-B), far ultraviolet (UV-C) or the like, can be prevented from being inputted into the wristwatch case 1. Thus, the liquid crystal layer in the liquid crystal display device 86 can be prevented from being damaged by ultraviolet rays. In addition, light other than light in the ultraviolet region, for example, light in the visible region, among external light input through the watch glass 3, can be transmitted through the ultraviolet reflecting film 82 and input into the watch case 1. Therefore, it is possible to recognize time using the inputted light like a general watch.

At this time, each of the luminescent layers 15 provided on the reflector 46, the time mark 14, the hand 11, the concealing member 12 and the liquid crystal display device 86 of the dial 5 is in a transparent state, respectively. Therefore, the visibility of the timepiece parts of the dial 5, the time stamp 14, the hand 11, the concealing member 12 and the liquid crystal display device 86 is not affected by the respective light-emitting layers 15, so that the timepiece parts can be clearly seen. In this way, the time can be identified by the dial 5, the time scale 14 and the hands 11. Further, in the liquid crystal display device 86, light other than light in the ultraviolet region is input through the display opening portion 85 in the dial 5, and the input light is transmitted through the upper polarizing plate 44, the liquid crystal element 87, and the lower polarizing plate 45. The transmitted light rays will then be transmitted through each luminescent layer 15 and reflected by the reflector 46. Thus, as with a general liquid crystal display device, information of time and the like can be recognized.

Further, in a dark place such as a room or the like, the ultraviolet emitting element 81 may be turned on to emit light in the ultraviolet region into the watch case 1. The emitted light in the ultraviolet region will be irradiated to the respective light emitting layers 15 provided on the reflector 46, the time stamp 14, the hand 11, the concealing member 12 and the liquid crystal display device 86 of the dial 5. Thus, each light-emitting layer 15 will emit colored visible light in response to light in the ultraviolet region. In this case, a part of the light emitted from the ultraviolet light emitting element 81 will be directly irradiated on each of the light emitting layers 15, and the other part of the light will be reflected by the ultraviolet reflecting film 82 provided on the lower surface of the cover glass 3 and irradiated on each of the light emitting layers 15. In this way, since the ultraviolet light emitted from the ultraviolet emitting element 81 is not transmitted through the watch glass 3 and is discharged to the outside, the ultraviolet light emitted from the ultraviolet emitting element 81 is hardly lost, and can be efficiently irradiated on each light emitting layer 15. Thus, each light emitting layer 15 can emit sufficient light.

At this time, the light emitting layers 15 provided on the timing marks 14 and the concealing member 12 are so constructed that the light emission amounts thereof gradually increase as the distance between the light emitting layer 15 and the corresponding ultraviolet light emitting element 81 increases, and as an example, the light emission amount of the light emitting layer 15 on each timing mark 14 may be so different that the wavelength of the light emitted therefrom gradually decreases as each light emitting layer is distant from the corresponding ultraviolet light emitting element 81. Thus, the light emission color of each light emitting layer 15 in the vicinity of the corresponding ultraviolet light emitting element 81 is a color close to red, which is longer in wavelength, and as the light emitting layer 15 is farther from the ultraviolet light emitting element 81, their light emission colors sequentially change to a color close to green and a color close to blue as the wavelength is gradually shortened. In this way, in the light-emitting layer 15 near the ultraviolet-emitting element 81, although the amount of light in the ultraviolet region irradiated is large, the amount of light emitted is small. In addition, in the light emitting layer 15 distant from the ultraviolet light emitting element 81, although the amount of light in the ultraviolet region irradiated is small, the amount of light emitted by the light emitting layer 15 gradually increases. Therefore, the light-emitting layer can emit light of uniform brightness regardless of the proximity to the ultraviolet-emitting element 81 or the distance from the ultraviolet-emitting element 81. In addition, the colors of light emitted from each of the light emitting layers 15 may be different from each other. Thus, desired decorative and design effects can be simultaneously obtained.

Further, at this time, the ultraviolet light emitted from the ultraviolet emitting element 81 is inputted into the liquid crystal display device 86 through the display opening portion 85 in the dial 5. The input light will be transmitted through the ultraviolet transmissive upper polarizing plate 44, the liquid crystal cell 87, the ultraviolet transmissive lower polarizing plate 45. Thus, the light emitting layer 15 emits color light in the visible region in response to light in the ultraviolet region, and this visible region light is used as a backlight for the liquid crystal element 87, so that the liquid crystal element 87 can be illuminated. In this way, time and the like information can be identified. In this case, the upper polarizing plate 44 and the lower polarizing plate 45 of the liquid crystal display device 86 are of an ultraviolet transmissive type. Therefore, light in the ultraviolet region will be transmitted through and irradiate the liquid crystal layer in the liquid crystal element 87. However, since the light emission time based on the ultraviolet ray emitting element 81 is short, the liquid crystal layer is hardly damaged.

In this way, according to this electronic watch, since the upper polarizing plate 44 and the lower polarizing plate 45 of the liquid crystal display device 86 are of the ultraviolet-transmitting type, light including light in the ultraviolet region can be transmitted through the upper polarizing plate 44, the liquid crystal element 87, and the lower polarizing plate 45. Among the transmitted light rays, light rays other than light rays in the ultraviolet region, for example, light rays in the visible region, will be transmitted through the light emitting layer 15 of the reflector 46 and reflected by the reflector 46. Therefore, the liquid crystal element 87 can be illuminated by the reflected light. In addition, when light in the ultraviolet region is irradiated onto the light emitting layer 15, the light emitting layer 15 will emit color light in response to the light in the ultraviolet region. Thus, the liquid crystal element 87 can be illuminated with color light emitted from the light emitting layer. Therefore, the liquid crystal element 87 can be appropriately illuminated regardless of whether light input to the liquid crystal display device 86 is light other than ultraviolet light, such as visible light or the like, or ultraviolet light.

Further, in this electronic watch, when light is emitted from the ultraviolet emitting element 81, light in the ultraviolet region is incident into the watch case 1. A part of the light rays in the ultraviolet region will be directly irradiated to the light emitting layers 15 provided on the reflection film 46, the time mark 14, the hand 11, the concealing member 12 and the liquid crystal display device 86 of the dial 5, respectively, and the other part of the light rays will be reflected by the ultraviolet reflecting film 82 provided on the lower surface of the watch glass 3 and irradiated to each light emitting layer 15. In this way, since the ultraviolet light emitted from the ultraviolet emitting element 81 is not transmitted through the watch glass 3 and is discharged to the outside, the ultraviolet light emitted from the ultraviolet emitting element 81 is hardly lost, and can be efficiently irradiated on each light emitting layer 15. Each light emitting layer 15 can emit sufficient light.

In addition, in this electronic watch, the ultraviolet reflecting film 82 has a structure constituted by first and second evaporation layers 91 and 92 which are made of different materials and are alternately laminated together. Therefore, by selecting an appropriate number of the first and second evaporation layers 91 and 92 and selecting the respective layer thicknesses of the first and second evaporation layers 91 and 92, the reflectance of light in the ultraviolet region or the transmittance of light other than light in the ultraviolet region can be appropriately set. For example, if the number of the first and second evaporation layers 91 and 92 is increased, the reflectance of light in the ultraviolet region is increased. Further, by increasing the thickness of the first and second evaporation layers 91 and 92, the reflectance of light in the ultraviolet region can also be increased. Therefore, by a combination of these factors, an optimum reflectance can be obtained.

In this case, in particular, the number of the first and second evaporation layers 91 and 92 is selected to be 22 layers so that the total thickness is 1.075 μm. Thus, not less than 92% of light other than ultraviolet light, for example, visible light, will be transmitted therethrough, while 70 to 90% of the ultraviolet light emitted from the ultraviolet emitting element 81 will be reflected. Further, of the external ultraviolet rays inputted through the watch glass 3 from the outside of the watch case 1, not less than 90% of the rays having a wavelength of not more than 300nm are cut off, and preferably about 98% of the rays having a wavelength of not more than 400nm are cut off. Thus, the ultraviolet light from the ultraviolet emitting element 81 can be sufficiently irradiated on the light emitting layer 15. Further, light of ultraviolet region from the outside is almost completely cut off, and short wavelength harmful light of ultraviolet region, such as middle ultraviolet (UV-B) or far ultraviolet (UV-C), contained in the outside light can be prevented from being inputted into the wristwatch case 1. Thus, the liquid crystal layer in the liquid crystal display device 86 can be prevented from being damaged by ultraviolet rays. Therefore, the durability of the liquid crystal display device 86 can be improved.

Further, in the eighth embodiment described above, the ultraviolet emitting element 81 is disposed in the concave portion 31 of the blinder 12 in a state that it is close to the lower surface of the watch glass 3. In this way, the ultraviolet emitting element 81 is disposed above the dial 5 and the hand 11. However, it is not limited thereto. By way of example, the ultraviolet emitting elements 30 may also be disposed in the concealer 12, as shown in fig. 18A or 18B. That is, as shown in a modified example in fig. 18A, the blinder 12 may be made of a transparent material, and the ultraviolet emitting element 81 is disposed in an inside lower portion of the transparent blinder 12. Alternatively, as a modified example shown in fig. 18B, the ultraviolet emitting element 81 may be disposed in the lower side of the transparent blinder 12; meanwhile, a space S is provided between the concealing member 12 and the dial 5. And ultraviolet rays generated by the ultraviolet ray emitting element 30 can be irradiated on the upper side of the dial 5 through the space S. In any of the above structures, since the ultraviolet emitting element 81 is disposed between the dial 5 and the hand 11, the ultraviolet region light is reflected by the ultraviolet reflecting film 82 provided on the watch glass 3. Therefore, the same operation and effect as those of the eighth embodiment can be achieved.

Further, in the eighth embodiment described above, although the ultraviolet reflecting film 82 is provided on the lower surface of the cover glass 3, it is not limited thereto. It may also be provided on the upper surface of the watch glass 3. Further, the ultraviolet reflecting film 82 does not necessarily have a structure in which evaporation layers are laminated. For example, it may be a structure in which an ultraviolet reflecting agent for reflecting ultraviolet rays is mixed in a resin plate material. Further, it may be a structure in which an ultraviolet reflecting agent for reflecting ultraviolet rays is mixed in the surface glass. In any of the above structures, the mixing amount of the ultraviolet reflecting agent can be appropriately adjusted, and the reflectance of light in the ultraviolet region and the transmittance of light other than light in the ultraviolet region can be set in an optimum state. In this way, the same operation and effect as those of the eighth embodiment can be achieved.

In addition, in the eighth embodiment described above, as the distance of the light emitting layer 15 from the corresponding ultraviolet light emitting element 81 is increased, the amount of light emission thereof is gradually increased. For example, as the light-emitting layer 15 is farther from the corresponding ultraviolet-emitting element 81, the wavelength of the visible region light emitted therefrom gradually decreases. However, it is not limited thereto. The layer thickness of the luminescent layer 15 may be gradually increased. Further, the light emitting layer 15 may be provided in a dot shape as shown in fig. 13, and the density of the dots may be gradually increased as being distant from the ultraviolet ray emitting element 81. With such a structure, even if the light emitting layer 15 is distant from the ultraviolet light emitting element 81, light can be emitted with almost uniform brightness.

In addition, in the eighth embodiment described above, although a case where the present invention is applied to an electronic watch as an electronic device is described, it is not limited thereto. As an example, the present invention can be applied also to a mobile phone as in the seventh embodiment shown in fig. 22 and 23, and further, the present invention can be widely applied to various electronic devices such as an electronic notebook, an electronic dictionary, a portable terminal, a personal computer, a printer, and the like, and also to an automobile, to various devices such as a meter or the like, or to parts thereof.

As described above, in the respective embodiments shown in fig. 1 to 24, an electronic apparatus includes: a device case (watch case 1 or device case 60) having a window portion (watch glass 3 or cover glass 63); a module (meter module 6 or 40, or module 66) at least a portion of which is disposed in the device housing corresponding to the window portion; a frame-like portion (a concealing member 12 or 67) provided between the module and the apparatus casing in correspondence with a peripheral portion of the window portion; an ultraviolet emitting section (ultraviolet lamp 30) for emitting light in an ultraviolet region, the ultraviolet emitting section being provided in the frame-like section; and a light emitting layer (15) for emitting colored light in response to the ultraviolet ray emitted from the ultraviolet ray emitting portion, the light emitting layer being provided on the at least one portion of the module corresponding to the window portion.

According to this embodiment, the ultraviolet-emitting portion is provided in the frame-like portion, and the frame-like portion is disposed between the module and the device case corresponding to the peripheral portion of the window portion. Therefore, the ultraviolet emitting portion can be installed so as not to be an obstacle nor to be broken when subjected to an impact or the like. Further, the ultraviolet ray may be appropriately irradiated between the module and the window portion from the ultraviolet emitting portion. Thereby, the ultraviolet rays can be surely and appropriately irradiated on the light emitting layer, so that the light emitting layer can emit sufficient light.

Further, in the embodiment shown in fig. 16, the ultraviolet ray emitting section (ultraviolet lamp 30) is provided in the frame-like section (concealing member 12) at a position close to the inner surface of the window section. Thus, light in the ultraviolet region can be better irradiated between the module and the window portion.

Further, in the embodiment shown in fig. 18A and 18B, the frame-like portion (the blinder 12) is a frame-like member made of a transparent material, a space portion (the concave portion 32 or the space portion 33) is provided inside the frame-like member, and the ultraviolet ray emitting portion (the ultraviolet lamp 30) is disposed in the space portion. In this case, the ultraviolet emitting portion can be installed so as not to be an obstacle nor to be broken when subjected to an impact or the like, better in this respect than the other embodiments in fig. 16 to 24.

In addition, in the embodiment shown in fig. 16, the module (watch module 6) includes a function of displaying time using the hands (11) and the dial (5), and the light emitting layer (15) is provided on the hands and the dial. In this case, since the light emitting layer emits colored light in response to the ultraviolet rays from the ultraviolet ray emitting portion, the time can be easily recognized even in a dark place.

Further, in the embodiments shown in fig. 20 to 23, the module (the watch module 40 or the module 66) includes a function of displaying information with one liquid crystal display device (41), and the light emitting layer (15) is provided on the liquid crystal display device. In this case, since the light emitting layer emits colored light in response to the ultraviolet rays from the ultraviolet ray emitting portion, the time can be easily recognized even in a dark place.

Further, in the embodiment shown in fig. 21, an electronic apparatus includes: a device case (watch case 1) having a window portion (watch glass 3); a liquid crystal display device (50) disposed in the apparatus casing corresponding to the window portion; an ultraviolet emitting section (ultraviolet emitting device 51) for emitting light in an ultraviolet region, the ultraviolet emitting section being disposed on a rear surface side of the liquid crystal display device; and a light emitting layer (15) for emitting colored light in response to light in an ultraviolet region, the light emitting layer being provided on the liquid crystal display device side.

According to this embodiment, when the ultraviolet emitting portion is turned on to emit light in the ultraviolet region, the light emitting layer reacts to ultraviolet rays from the ultraviolet emitting portion to emit colored light. Thus, the liquid crystal display device can be illuminated with color light emitted from the light emitting layer. Thereby, the backlight function can be realized by the light emitting layer, and excellent decorativeness can be obtained by the colored light emitted by the light emitting layer.

In addition, in the embodiment shown in fig. 11, a phosphorescent material is mixed in the light emitting layer. In this case, the phosphorescent material can store energy in light emitted from the light emitting layer. In addition, since the phosphorescent material can emit afterglow after the light emitting portion in the ultraviolet region is turned off, it has an afterglow function and can thereby obtain high decorativeness. In addition, the intermittent time of the ultraviolet ray emitting part which emits light at a constant time can be extended, so that the purpose of reducing energy consumption can be achieved.

Further, in the embodiment shown in fig. 20 to 29, a liquid crystal display device includes: a liquid crystal element (87) formed by enclosing liquid crystal between a pair of transparent electrode printed circuit boards (42, 43); an ultraviolet-transmitting upper polarizing plate (44) disposed on the upper surface of the liquid crystal cell; an ultraviolet-transmitting lower polarizing plate (45) disposed on the lower surface of the liquid crystal cell; a reflector (46) disposed on the lower side of the lower polarizing plate; and a light emitting layer (15) for emitting colored light in response to light in the ultraviolet region, the light emitting layer being provided on the upper surface of the reflector.

According to this embodiment, since the upper polarizing plate and the lower polarizing plate are ultraviolet-transmissive, when light rays containing light rays in the ultraviolet region are input through the upper polarizing plate, these light rays will be transmitted through the upper polarizing plate, the liquid crystal cell, and the lower polarizing plate. Among the transmitted light, light other than light in the ultraviolet region, for example, light in the visible region, is transmitted through the light-emitting layer and reflected by the reflector. Therefore, the liquid crystal element can be illuminated by the reflected light. In addition, when light in the ultraviolet region irradiates the light-emitting layer, the light-emitting layer reacts to the light in the ultraviolet region to emit colored light. Thus, the liquid crystal element can be illuminated with color light emitted from the light emitting layer. Therefore, the liquid crystal element can be appropriately illuminated regardless of whether light input to the liquid crystal display device is light other than ultraviolet light, such as visible light or the like, or ultraviolet light.

Further, in the embodiment shown in fig. 16 to 29, an electronic device includes: a device case (watch case 1 or device case 60) having a window portion (watch glass 3 or cover glass 63); a module (watch module 6, 40 or 80, or module 66) disposed in the device housing corresponding to the window portion; an ultraviolet emitting portion (ultraviolet emitting element 30 or 81) for emitting first light of an ultraviolet region, the ultraviolet emitting portion being provided in the apparatus casing corresponding to a peripheral portion of the window portion; a light emitting layer (15) for emitting colored light in response to first light of an ultraviolet region emitted from the ultraviolet emitting portion, the light emitting layer being provided on the module; and an ultraviolet reflecting film (82) for reflecting the first light ray in the ultraviolet region emitted from the ultraviolet emitting portion and transmitting light rays other than the first light ray in the ultraviolet region, the ultraviolet reflecting film being provided on at least one of the front surface and the rear surface of the window portion.

According to this embodiment, when light is emitted from the ultraviolet emitting portion, light in the ultraviolet region will be emitted into the device case. A part of the light will be directly irradiated on the light emitting layer, and the other part of the light will be reflected by the ultraviolet reflecting film on the window portion and irradiated on the light emitting layer. Therefore, light in the ultraviolet region emitted from the ultraviolet emitting portion can be efficiently irradiated on the light emitting layer without being lost. Thus, the light emitting layer can emit sufficient light.

Further, in the embodiment shown in fig. 20 to 29, an electronic device includes: a device case (watch case 1 or device case 60) having a window portion (watch glass 3 or cover glass 63); a module (watch module 40 or 80) having a liquid crystal display device (41, 86) which is disposed at least in the apparatus casing corresponding to the window portion and which includes a liquid crystal cell (87) formed by enclosing liquid crystal between a pair of transparent electrode printed circuit boards (42 and 43), a pair of ultraviolet ray transmission type polarizing plates (44 and 45) disposed on the upper and lower surfaces of the liquid crystal cell, respectively, and a reflector (46) disposed on the lower side of the polarizing plate on the lower side of the liquid crystal cell; an ultraviolet emitting portion (ultraviolet emitting element 30 or 81) for emitting first light of an ultraviolet region, the ultraviolet emitting portion being provided in the apparatus casing corresponding to a peripheral portion of the window portion; a light emitting layer (15) for emitting colored light in response to first light in an ultraviolet region emitted from the ultraviolet emitting portion, the light emitting layer being provided on a reflector of the liquid crystal display device; and an ultraviolet reflecting film (82) for reflecting the first light ray in the ultraviolet region emitted from the ultraviolet emitting portion and transmitting light rays other than the first light ray in the ultraviolet region, the ultraviolet reflecting film being provided on at least one of the front surface and the rear surface of the window portion.

According to this embodiment, since the upper polarization plate and the lower polarization plate are of the ultraviolet-ray transmissive type, it is possible to obtain the same effect as in the previously described eighth embodiment, that is, the liquid crystal element can be appropriately illuminated regardless of whether the light input to the liquid crystal display device is light other than ultraviolet-region light, such as visible-region light or the like, or ultraviolet-region light. Further, since the ultraviolet reflecting film is provided in the window portion of the device case, the same effect as that in the above-described eighth embodiment can be obtained, that is, the ultraviolet region light emitted from the ultraviolet emitting portion can be efficiently irradiated on the light emitting layer without being lost. Thus, the light emitting layer can emit sufficient light to illuminate the liquid crystal element very brightly.

In the embodiment shown in fig. 26 and 28, the ultraviolet reflecting film (82) cuts off only the second light ray in the ultraviolet region among the external light rays input from the outside of the device case (watch case 1) through the window portion (watch glass 3).

According to this embodiment, the same operation and effect as those described previously can be achieved. In addition, the ultraviolet reflecting film is characterized in that the ultraviolet reflecting film cuts off only ultraviolet light among external light inputted from the outside of the device case through the window portion. Therefore, light in the ultraviolet region included in the external light does not impinge on the light-emitting layer in the device case. In addition, particularly, it is possible to prevent harmful light of short wavelength among light of ultraviolet region from being inputted into the device case. Thus, the liquid crystal layer in the liquid crystal display device can be prevented from being damaged.

Further, in the embodiment shown in fig. 28, the ultraviolet reflecting film (82) has a structure formed by laminating evaporation layers, which are thin films.

According to this embodiment, since the ultraviolet reflecting film has a structure in which the evaporation layers are laminated, the reflectance of light in the ultraviolet region and the transmittance of light other than light in the ultraviolet region can be appropriately set by appropriately selecting the number of the evaporation layers and the layer thickness of the evaporation layers. For example, if the number of evaporation layers is increased, the reflectance of light in the ultraviolet region is increased. Further, by increasing the thickness of the evaporation layer, the reflectance of the ultraviolet ray can be increased. Therefore, by a combination of these factors, an optimum reflectance can be obtained.

In the embodiment shown in fig. 28, the ultraviolet reflecting film (82) has a structure capable of transmitting not less than 92% of the second light having a wavelength of not less than 450nm excluding the light in the ultraviolet region; capable of reflecting 70% to 90% of the first light ray in the ultraviolet region emitted from the ultraviolet emitting portion (ultraviolet emitting element 81); and it is possible to cut off light of a wavelength of not less than 90% thereof and not more than 300nm and cut off fourth light of a wavelength of not more than 400nm of about 98% thereof with respect to light of an ultraviolet region inputted from the outside of the device case (watch case 1) through the window portion (watch glass 3).

According to this embodiment, since the ultraviolet reflecting film can reflect 70 to 90% of the ultraviolet region light emitted from the ultraviolet emitting portion, the ultraviolet region light emitted from the ultraviolet emitting portion can be efficiently reflected and sufficiently irradiated on the light emitting layer. Further, since it is possible to cut off not less than 90% of light having a wavelength of not more than 300nm and preferably about 98% of light having a wavelength of not more than 400nm from the outside in the ultraviolet region, the light from the outside is almost certainly cut off. In addition, since not less than 92% of light having a wavelength of not less than 450nm other than light in the ultraviolet region can be transmitted therethrough, the inside of the device case can be appropriately illuminated by light other than light in the ultraviolet region transmitted through the ultraviolet reflection film.

Further, in the embodiment shown in fig. 13 and 25, the light emitting layer (15) is configured such that the light emission amount thereof gradually increases as the light emitting layer is distant from the ultraviolet ray emitting section (ultraviolet ray emitting element 81).

According to this embodiment, in the light emitting layer near the ultraviolet emitting portion, although the amount of light irradiated in the ultraviolet region is large, the light emission amount is small, and in the light emitting layer far from the ultraviolet emitting portion, although the amount of light irradiated in the ultraviolet region is small, the light emission amount of the light emitting layer is gradually increased. Therefore, the light emitting layer can emit light of almost uniform brightness regardless of the proximity to the ultraviolet emitting portion or the distance from the ultraviolet emitting portion.

In the embodiment shown in fig. 25, the light-emitting layer (15) is structured such that the wavelength of visible region light emitted therefrom is gradually shortened as the light-emitting layer is distant from the ultraviolet-emitting portion (ultraviolet-emitting element 81).

According to this embodiment, the light emission colors of the light emitting layers in the vicinity of the respective ultraviolet light emitting portions are colors close to red, which are longer in wavelength, and their light emission colors sequentially change to colors close to green and colors close to blue as the wavelength is gradually shortened as the light emitting layers are farther from the ultraviolet light emitting portions. Therefore, the light emitting layer can emit light of almost uniform brightness regardless of the proximity to the ultraviolet emitting portion or the distance from the ultraviolet emitting portion. In addition, colors of light emitted from the light emitting layer may be different from each other. Therefore, excellent decorativeness can be obtained at the same time.

Claims (17)

1. An electronic device, comprising:

a device housing (1, 60) having a window portion (63);

a module (6, 40, 66) at least a portion of which is disposed in the device housing corresponding to the window portion;

a frame-like portion (12, 67) provided between the module and the device case in correspondence with a peripheral portion of the window portion;

an ultraviolet emitting portion (30) for emitting light in an ultraviolet region, the ultraviolet emitting portion being provided in the frame-like portion; and

and a light emitting layer (15) for emitting colored light in response to the ultraviolet ray emitted from the ultraviolet ray emitting portion, the light emitting layer being provided on the at least one portion of the module corresponding to the window portion.

2. An electronic device according to claim 1, wherein the ultraviolet-emitting portion (30) is provided in the frame-like portion at a position close to the inner surface of the window portion.

3. An electronic device according to claim 1, wherein the frame-like portion (12) is a frame-like member made of a transparent material, a space portion (32, 33) is provided inside the frame-like member, and the ultraviolet-ray emitting portion is disposed in the space portion.

4. An electronic device as claimed in claim 1, characterized in that the module (6) comprises a function for displaying time by means of a hand (11) and a dial (5), and in that the luminescent layer is provided on the hand and the dial.

5. An electronic device as claimed in claim 1, characterized in that the module (40, 66) comprises functionality for displaying information by means of a liquid crystal display device (41), and in that the luminescent layer (15) is provided on the liquid crystal display device.

6. An electronic device, comprising:

a device housing (1) having a window portion (3);

a liquid crystal display device (50) disposed in the apparatus casing corresponding to the window portion;

an ultraviolet emitting section (51) for emitting light in an ultraviolet region, the ultraviolet emitting section being disposed on a rear surface side of the liquid crystal display device; and

and a light emitting layer (15) for emitting color light in response to light in an ultraviolet region, the light emitting layer being provided on the liquid crystal display device side.

7. An electronic device as claimed in claim 6, characterized in that a phosphorescent material (17) is mixed in the light-emitting layer.

8. A liquid crystal display device, comprising:

a liquid crystal element (87) formed by enclosing liquid crystal between a pair of transparent electrode printed circuit boards (42, 43);

an ultraviolet-transmitting upper polarizing plate (44) disposed on the upper surface of the liquid crystal cell;

an ultraviolet-transmitting lower polarizing plate (45) disposed on the lower surface of the liquid crystal cell;

a reflector (46) disposed on the lower side of the lower polarizing plate; and

a light emitting layer (15) for emitting colored light in response to light in the ultraviolet region, the light emitting layer being provided on the upper surface of the reflector.

9. An electronic device, comprising:

a device housing (1, 60) having a window portion (3, 63);

a module (6, 40, 80, 66) disposed in the device housing corresponding to the window portion;

an ultraviolet emitting portion (30, 81) for emitting first light in an ultraviolet region, the ultraviolet emitting portion being provided in the apparatus casing in correspondence with a peripheral portion of the window portion;

a light emitting layer (15) for emitting colored light in response to first light of an ultraviolet region emitted from the ultraviolet emitting portion, the light emitting layer being provided on the module; and

and an ultraviolet reflecting film (82) for reflecting the first light ray in the ultraviolet region emitted from the ultraviolet emitting portion and transmitting light rays other than the first light ray in the ultraviolet region, the ultraviolet reflecting film being provided on at least one of the front surface and the rear surface of the window portion.

10. An electronic device, comprising:

a device housing (1, 60) having a window portion (3, 63);

a module (40, 80) having a liquid crystal display device (41, 86), at least the module being disposed in the apparatus casing corresponding to the window portion, and the liquid crystal display device including: a liquid crystal element (87) formed by enclosing liquid crystal between a pair of transparent electrode printed circuit boards (42, 43); a pair of ultraviolet-transmitting polarizing plates (44, 45) disposed on the upper and lower surfaces of the liquid crystal cell, respectively; and a reflector (46) disposed on the lower side of the polarizing plate on the lower side of the liquid crystal cell;

an ultraviolet emitting portion (30, 81) for emitting first light in an ultraviolet region, the ultraviolet emitting portion being provided in the apparatus casing in correspondence with a peripheral portion of the window portion;

a light emitting layer (15) for emitting colored light in response to first light in an ultraviolet region emitted from the ultraviolet emitting portion, the light emitting layer being provided on a reflector of the liquid crystal display device; and

and an ultraviolet reflecting film (82) for reflecting the first light ray in the ultraviolet region emitted from the ultraviolet emitting portion and transmitting light rays other than the first light ray in the ultraviolet region, the ultraviolet reflecting film being provided on at least one of the front surface and the rear surface of the window portion.

11. The electronic device according to claim 9, wherein the ultraviolet reflecting film (82) cuts off only the second light ray in the ultraviolet region among the external light rays input from the outside of the device case through the window portion (3).

12. The electronic device according to claim 10, wherein the ultraviolet reflecting film (82) cuts off only a second light ray in an ultraviolet region among the external light rays inputted from the outside of the device case through the window portion.

13. The electronic device according to claim 9, wherein the ultraviolet reflecting film (82) has a structure formed by laminating evaporation layers, the evaporation layers being thin films.

14. The electronic device according to claim 10, wherein the ultraviolet reflecting film (82) has a structure formed by laminating evaporation layers, the evaporation layers being thin films.

15. The electronic device according to claim 9, wherein the ultraviolet reflecting film (82) has a structure capable of transmitting not less than 92% of the second light having a wavelength of not less than 450nm excluding the light in the ultraviolet region; capable of reflecting 70% to 90% of a first light ray in an ultraviolet region emitted from the ultraviolet emitting portion; for light in an ultraviolet region input from the outside of the device case through the window portion, it is possible to cut off light of which wavelength is not more than 300nm for not less than 90% and cut off fourth light of which wavelength is not more than 400nm for around 98%.

16. An electronic device according to claim 9, wherein the light-emitting layer (15) is so structured that the amount of light emission thereof gradually increases as the light-emitting layer is distant from the ultraviolet-ray emitting section.

17. An electronic device according to claim 10, wherein the light-emitting layer (15) is so structured that the wavelength of light in the visible region emitted therefrom is gradually shortened as the light-emitting layer is farther from the ultraviolet-emitting portion.