JP5799775B2 - Display device - Google Patents

Description

  The present invention relates to a display device having a display panel having a display unit and a light source that illuminates the display unit.

  Conventionally, as this type of display device, for example, the one described in Patent Document 1 below is known. The display device described in Patent Document 1 includes a pointer-type instrument mounted on a vehicle, and a driving device having a rotating shaft protruding from a circuit board is mounted, and a pointer is mounted on the tip of the rotating shaft. A display panel having a translucent measurement value display part (display part) arranged in correspondence with the pointer and a background part as a background of these measurement value display parts is arranged behind the display panel. The measurement value display unit of the display panel is transmitted and illuminated by light from a light source disposed behind.

JP 2002-296077 A

By the way, in the display device such as the pointer-type instrument described in Patent Document 1, when the display panel is viewed from the observer side (vehicle driver side), the measured value is illuminated (light-emitting display) by the light from the light source. The appearance of the entire display panel composed of the display unit (display unit) and the background unit serving as the background of the measurement value display unit is flat and lacks in interest.
SUMMARY OF THE INVENTION In order to address the above-described problems, an object of the present invention is to provide a display device capable of realizing a novel appearance that is interesting and novel.

  The present invention provides a display device having a display panel having a display unit and a light source that illuminates the display unit, wherein the display panel is arranged to face each other so as to have a predetermined gap. The first panel body has a first translucent portion having light transmissivity and light reflectivity on the front surface or the back surface of the first translucent substrate that is the base material, The second panel body has a second translucent portion having light transmissivity and light reflectivity on the front surface or the back surface of the second translucent substrate which is a base material of the second panel body. The panel body is provided with the display section on the front side of the first semi-translucent section, and the second panel body has a light source from the light source when the display panel is viewed from the viewer side. A light transmissive portion that transmits light to the second light transmissive substrate and light from the light source are transmitted to the second light transmissive substrate. Let no light-shielding portion is provided so as not to overlap with the display unit, the light shielding portion, and being located behind the side of the second translucent portion.

  According to the present invention, the first panel body is provided with a background part that forms a background of the display part on the front side of the first semi-translucent part, and the light transmissive part is provided from the observer side. When the display panel is viewed from the front, the background portion is located behind the punched portion where the background portion is not formed.

  ADVANTAGE OF THE INVENTION According to this invention, the display apparatus which can achieve an initial objective and can implement | achieve the novel appearance with interest and novelty can be provided.

1 is a front view of a display device according to an embodiment of the present invention. AA sectional drawing of FIG. The expanded sectional view which expands and shows the B section in FIG. Sectional drawing of the display apparatus by the modification of this embodiment. The expanded sectional view which expands and shows the C section in FIG.

  Hereinafter, the case where the embodiment of the present invention is applied to an analog speedometer mounted on a vehicle such as an automobile will be described.

  1 and 2, an analog speedometer D as a display device includes a circuit board 10, a driving device 30 that is conductively attached to the circuit board 10 and has a rotating shaft 20 extending forward, and a rotating shaft 20. A pointer 40 that is driven dynamically, a display panel 50 that is positioned behind the pointer 40 and disposed on the circuit board 10, a case body 60 that is disposed between the circuit board 10 and the display panel 50, and a pointer The pointer light source 70 that illuminates 40, the light source 80 that illuminates the display panel 50, and a turning member 90 that defines the visible region of the display panel 50.

  The circuit board 10 is composed of a hard circuit board in which a wiring pattern (not shown) is provided on a glass epoxy base material, for example, and drives the pointer light source 70, the light source 80, the driving device 3, and the light sources 70 and 80. A control means (not shown) for controlling and various circuit components such as a resistor and a capacitor are conductively connected to the wiring pattern.

  The driving device 30 is composed of a movable magnet type instrument or a stepping motor, and its main part is mounted behind the circuit board 10 so that the rotating shaft 20 penetrates the circuit board 10 and is appropriately connected by means such as soldering. It is electrically connected to the wiring pattern (the control means).

  The pointer 40 is attached to the distal end side of the rotary shaft 20 and includes an indicator portion 41 made of a light-transmitting synthetic resin and a pointer cap 42 made of a light-shielding synthetic resin that covers the outer periphery of the rotation center portion of the indicator portion 41. Yes.

  The instruction unit 41 extends linearly to instruct a display unit to be described later of the display panel 50, and receives the illumination light emitted from the pointer light source 70 disposed behind the pointer 40 at the center of rotation. A light receiving portion 43 that reflects and guides the illumination light to the distal end side of the instruction portion 41 is formed. The pointer 40 (instruction unit 41) rotates on the display panel 50 based on the measured value (in this case, the speed of the vehicle).

  As shown in FIG. 3, the display panel 50 includes a pair of first and second panel bodies 52 and 53 that are opposed to each other so as to have a predetermined gap portion 51. The outer shape and the outer shape of the second panel 53 are substantially the same.

  In this case, the gap 51 is formed as a clearance (air layer) of, for example, several millimeters, and of the first and second panel bodies 52 and 53, the first panel body 52 is on the pointer 40 side (that is, the instruction). The second panel body 53 is located on the case body 60 side (that is, between the first panel body 52 and the case body 60). ing.

  The first panel body 52 has light transmission and light on the entire front surface of the first light-transmitting substrate 52a made of a light-transmitting synthetic resin (or a dark-colored semi-transparent synthetic resin) as a base material. A first half mirror layer (first semi-translucent portion) 52b having reflectivity is applied by means such as vapor deposition. For example, the first half mirror layer 52b is formed as a reflective film made of an aluminum thin film.

  Then, on the front surface of the first half mirror layer 52b, a display unit 52c composed of a speed number and a speed scale indicated by the instruction unit 41, and a light-shielding background unit 52d that forms the background of the display unit 52c, The display part 52c provided on the front side of the first half mirror layer 52b has an arcuate array shape along the rotation trajectory (operation range) of the pointing part 41. The display unit 52c may be abolished as necessary.

  In this case, a substantially circular cutout portion 52e that is a non-formation region of the background portion 52d is provided inside the display portion 52c (that is, near the center of the display panel 50) so as to surround the pointer cap 42. ing. Accordingly, the background portion 52d located on the front side of the first half mirror layer 52b has a ring shape surrounding the punched portion 52e, like the display portion 52c. 52c is formed.

  The display portion 52c and the background portion 52d are printed on the front surface of the first half mirror layer 52b, respectively, with the display portion 52c being made of, for example, white translucent ink and the background portion 52d being made of, for example, black light-shielding ink. The

  The first half mirror layer 52b is partially exposed at the extracted portion 52e where the background portion 52d is not formed, and the light from the light source 80 guided through the light transmitting portion described later is directed to the viewer. It can be transmitted. Here, paying attention to the positional relationship between the light transmission part and the extraction part 52e, the light transmission part is located immediately below the first half mirror layer 52b (back side) when the display panel 50 is viewed from the viewer side. ). In FIG. 2, reference numeral 52 f denotes a first through portion that includes a through hole corresponding to a connecting portion between the rotary shaft 20 and the pointer 40.

  On the other hand, the second panel body 53 that forms a pair with the first panel body 52 is similar to the first panel body 52 in that the transparent translucent synthetic resin (or dark-colored semi-translucent synthetic) that is the base material thereof is used. A second half mirror layer (second semi-translucent portion) 53b having light transmissivity and light reflectivity is formed on the entire front surface of the second translucent substrate 53a made of resin using a means such as vapor deposition. It has been given. For example, the second half mirror layer 53b is formed as a reflective film made of an aluminum thin film.

  Then, on the back surface of the second half mirror layer 53b, a light transmission part 53c, which is a light transmission layer that transmits light from the light source 80 to the second light transmissive substrate 53a, and light from the light source 80 are supplied to the second half mirror layer 53b. A light-shielding portion 53d, which is a light-shielding layer that does not transmit to the second light-transmissive substrate 53a, is provided.

  In this case, the light shielding portion 53d is printed and formed on the back surface portion of the second half mirror layer 53b around the pointer cap 42 (that is, near the center portion of the display panel 50) with, for example, black light shielding ink.

  Specifically, the light-shielding portion 53d is formed in a substantially circular shape at the back surface portion of the second half mirror layer 53b corresponding to the region extending from the vicinity of the center portion of the display panel 50 to the inside of the display portion 52c. When the display panel 50 is viewed from the viewer side, the peripheral portion of the light shielding portion 53d located behind the second half mirror layer 53b overlaps the background portion 52d, and immediately below the peripheral portion of the light shielding portion 53d. A light source 80 is mounted on the circuit board 10 (behind).

  That is, when the display panel 50 is viewed from the viewer side, the size of the light shielding portion 53d formed in a substantially circular shape centering on the center point P of the display panel 50 in FIG. Is slightly larger than the size of the punched portion 52e formed in a substantially circular shape.

  On the other hand, the light transmitting portion 53c is formed by a substantially ring-shaped punched printing portion in which the light shielding portion 53d is not formed by printing out the light shielding ink forming the light shielding portion 53d, and is behind the second half mirror layer 53b. Is located. In this case, when the display panel 50 is viewed from the viewer side, the light transmission portion 53c includes the light shielding portion 53d and the light transmission portion 53c formed in the light shielding portion 53d as shown in FIG. It is provided on the back surface of the second half mirror layer 53b so as not to overlap the display portion 52c.

  In FIG. 2, reference numeral 53e denotes a second through part formed of a through hole corresponding to a connecting portion between the rotary shaft 20 and the pointer 40, and 54 denotes a periphery of each of the through parts 52f and 53e. 1 is a first spacer member interposed between the first panel body 52 and the second panel body 53, 55 is a peripheral edge of the two panel bodies 52, 53, The second spacer member is interposed between the second panel body 53 and the second spacer member.

  The case body 60 is made of, for example, white synthetic resin, and functions as a holding member that holds the display panel 50, functions as a housing that stores the pointer light source 70 and the light source 80, and emits illumination light from the pointer light source 70 forward. It functions as a reflecting member that reflects to the side.

  The pointer light source 70 is composed of, for example, a chip-type light emitting diode that emits red light, and a plurality of pointer light sources 70 are arranged on the circuit board 10 corresponding to the rotation center portion of the pointer 40. Illumination light emitted from the pointer light source 70 is reflected and guided to the distal end side of the instruction unit 41 through the light receiving unit 43, and thereby the instruction unit 41 emits red light.

  The light source 80 is formed of, for example, a chip-type light emitting diode that emits white light, and a plurality of light sources 80 are arranged on the circuit board 10 on the back side of the display panel 50. Specifically, the light source 80 is located immediately below the peripheral portion of the light shielding portion 53 d provided on the display panel 50.

  The facing member 90 is made of, for example, black synthetic resin, and includes an opening window 91 for exposing the pointer 40 and the display panel 50.

  The speedometer D is configured by the above-described units. In such a configuration, when the light source 80 is turned on, the light emitted from the light source 80 is the second half mirror layer 53b, which is a non-formation region of the light transmitting portion 53c and the light shielding portion 53d as shown as an optical path L1 in FIG. In addition to being guided to the location (that is, the location of the second half mirror layer 53b corresponding to the display portion 52c and the background portion 52d), it is guided to the light transmission portion 53c as shown as an optical path L2 in FIG.

  Among these, the light from the light source 80 guided to the second half mirror layer 53b, which is a region where the former light transmitting portion 53c and the light shielding portion 53d are not formed, is shown as the optical path L1, and the second half mirror layer 53b. The second light-transmitting substrate 53a, the gap portion 51, the first light-transmitting substrate 52a, the first half mirror layer 52b, and the display portion 52c are sequentially led to display the display portion 52c in a light emitting display. Is done.

  On the other hand, the light from the light source 80 guided to the latter light transmission part 53c is light transmission part 53c → second half mirror layer 53b → second light transmissive substrate 53a → gap part 51 → as shown as an optical path L2. The light is sequentially guided to the first light-transmitting substrate 52a, and then is reflected by the light transmitted through the first interface F1 that is the boundary between the first light-transmitting substrate 52a and the first half mirror layer 52b. Divided into light.

  And the light which permeate | transmits the 1st interface F1 permeate | transmits the 1st half mirror layer 52b location exposed through the extraction part 52e as shown as the optical path L3 in FIG. 3, and is radiate | emitted to the observer side, Accordingly, on the display panel 50, as shown in FIG. 1, the ring-shaped first light emitting display portion S1 surrounding the pointer cap 42 is emitted at the first half mirror layer 52b surrounded by the background portion 52d. Is displayed.

  Here, the light emission display width of the first light emission display portion S1 is substantially equal to the opening width of the light transmission portion 53c, and the first light emission display portion S1 when the display panel 50 is viewed from the viewer side. Is displayed on the same plane as the first boundary plane F1.

  On the other hand, the light reflected at the first boundary surface F1 is first transparent substrate 52a → gap 51 → so that it approaches the rotating shaft 20 side as the light advances as shown as an optical path L4 in FIG. It reaches the second translucent substrate 53a, and is then reflected again at the second boundary surface F2, which is the boundary between the second translucent substrate 53a and the second half mirror layer 53b. The light that passes through the second boundary surface F2 passes through the second half mirror layer 53b and is then absorbed by the light shielding portion 53d.

  Then, the light reflected again at the second boundary surface F2 is further reflected from the second light-transmitting substrate 53a to the gap so as to further approach the rotating shaft 20 side as the light travels as shown as an optical path L5 in FIG. From the part 51 to the first translucent substrate 52a, the light is sequentially divided into light that is transmitted through the first boundary surface F1 and light that is reflected.

  In this optical path L5, the light transmitted through the first boundary surface F1 passes through the first half mirror layer 52b exposed through the extraction portion 52e as shown as the optical path L6 in FIG. Accordingly, on the display panel 50, as shown in FIG. 1, a second light emitting display which is a ring-shaped light emitting display image surrounding the pointer cap 42 inside the first light emitting display portion S1, as shown in FIG. The part S2 is lit and displayed.

  Here, the light emitting display width of the second light emitting display portion S2 is substantially equal to the opening width of the light transmitting portion 53c, and the size of the second light emitting display portion S2 is the same as that of the first light emitting display portion S1. The diameter is smaller than the size. Further, when the display panel 50 is viewed from the viewer side, the second light-emitting display unit S2 that is a light-emitting display image is located deeper than the first light-emitting display unit S1 by the optical path L4 and the optical path L5. Displayed, and thereby a stereoscopic effect can be given to the display of the display panel 50.

  In the case of this embodiment, in the optical path L5, the light reflected again at the first boundary surface F1 (the optical path L7 in FIG. 3) is dimensioned so that the intensity of the light disappears thereafter. In addition, it is assumed that the light reflectance (light transmittance) of each of the half mirror layers 52b and 53b is set.

  As described above, in the present embodiment, in the speedometer D as a display device having the display panel 50 having the display unit 52 c and the light source 80 that illuminates the display unit 52 c, the display panel 50 has the gap 51. The first panel body 52 includes a first half mirror layer 52b on the front surface of a first light-transmitting substrate 52a that is a base material. The second panel body 53 has a second half mirror layer 53b on the back surface of the second light-transmitting substrate 53a that is the base material, and the first panel body 52 includes a first half mirror layer 53b. A display unit 52c is provided on the front side of the mirror layer 52b. When the display panel 50 is viewed from the viewer side, the second panel body 53 transmits light from the light source 80 to the second translucent substrate 53a. Light from the light transmission part 53c and the light source 80 to be transmitted to The light shielding portion 53d that does not transmit to the second light transmissive substrate 53a is provided so as not to overlap the display portion 52c, and the light shielding portion 53d is located behind the second half mirror layer 53b. is there.

  Therefore, the exposed region in which the half mirror layer 52b is partially exposed inside the background portion 52d, and the pair of half mirror layers disposed opposite to each other with the gap 51 and the pair of translucent substrates 52a and 53a interposed therebetween. 52b, 53b and a light source that passes (transmits) the light transmitting portion 53c by using the light transmitting portion 53c that is a printing portion of the light shielding portion 53d located behind the second half mirror layer 53b. The light from 80 is repeatedly reflected (multiple reflection) between the half mirror layers 52b and 53b as shown by optical paths L2 to L7 in FIG. Since the concentric light emitting display portions S1 and S2 to which a feeling is imparted are visually recognized, it is possible to realize a novel appearance that is interesting and novel.

  In the present embodiment, the first panel body 52 is provided with a background portion 52d that forms the background of the display portion 52c on the front side of the first half mirror layer 52b, and the display panel 50 is viewed from the viewer side. When the light source 80 is turned on, the display unit 52 is lit and displayed in the formation region of the background part 52d because the light transmission part 53c is positioned behind the extraction part 52e where the background part 52d is not formed. In addition, since the light emitting display portions S1 and S2 having a stereoscopic effect are emitted and displayed in the non-formation region (that is, the removal portion 52e) of the background portion 52d that is inside the background portion 52d, the light emitting display area of the display portion 52c Can be clearly distinguished from the light emitting display areas (that is, the exposed areas) of the light emitting display portions S1 and S2, and a display device with improved display quality can be provided.

  In the present embodiment, the light from the light source 80 that is transmitted through the light transmitting portion 53c is reflected twice on the front surface of the first half mirror layer 52b, so that the display panel 50 has two ring-shaped light emitting display portions. Although an example in which S1 and S2 are displayed by light emission has been described, for example, by appropriately setting the size of the gap 51 and the light reflectivity (light transmittance) at each of the half mirror layers 52b and 53b, the display panel 50 has 3 Needless to say, more than one light emitting display portion can be formed.

  In the present embodiment, when the display panel 50 is viewed from the viewer side, the display unit 52c is positioned at the peripheral portion of the display panel 50 (first panel body 52), and the light transmission unit 53c is displayed. Although the example which is located between the background part 52d which forms the background of the part 52c and the pointer cap 42 has been described, for example, as a modification of the present embodiment, as shown in FIGS. When the positional relationship with the transmission part 53c is reversed (opposite) and the display panel 50 is viewed from the viewer side, the light transmission part 53c is positioned at the peripheral portion of the display panel 50 (first panel body 52). The display unit 52c may be positioned between the light shielding unit 52d and the pointer cap 42. In this case, although detailed description is omitted, two ring-shaped light emitting display portions T1 and T2 are provided in the first half mirror layer 52b exposed around the background portion 52d so as to surround the display portion 52c. The light is displayed.

  In the present embodiment, the translucent substrates 52a and 53a are arranged in a parallel state, and the first half mirror layer 52b is provided on the front surface of the first translucent substrate 52a and the second translucent substrate is provided. The example in which the second half mirror layer 53b is provided on the back surface of the optical substrate 53a has been described. For example, the first light transmitting substrate 52a is not parallel to the second light transmitting substrate 53a through the gap 51. The first half mirror layer 52b may be provided on the front surface of the first light-transmissive substrate 52a that is inclined so as to form a state. For example, a configuration in which the first half mirror layer 52b having a reverse C shape is stacked on the first translucent substrate 52a having a reverse C shape on the front surface is conceivable.

  In the present embodiment, the first half mirror layer 52b is formed on the front surface of the first light transmitting substrate 52a, and the second half mirror layer 53b is formed on the back surface of the second light transmitting substrate 53a. For example, the first half mirror layer 52b is formed on the back surface of the first translucent substrate 52a and the second half mirror layer 53b is formed on the front surface of the second translucent substrate 53a. Alternatively, the half mirror layers 52b and 53b may be formed on the front surfaces (or the back surfaces) of the translucent substrates 52a and 53a, respectively.

  In the case of the present embodiment, the light transmission portion 53c is a cut-out printed portion where the light-shielding portion 53d is not printed. However, the light transmission portion 53c is not the above-described cut-out printed portion but a colored layer having a film thickness, for example. (A white print layer or the like) may be provided. When the light transmitting portion 53c is used as the colored layer as described above, the light shielding portion 53d and the colored layer (light transmitting portion 53c) are formed on the front surface of the second light transmitting substrate 53a, and the light shielding portion 53d and the colored layer are formed. A second half mirror layer 53b may be formed on the second light transmitting substrate 53a so as to cover the layer (light transmitting portion 53c).

  In the present embodiment, an example in which the light transmission portion 53c is formed in a ring shape has been described. However, the light transmission portion 53c may have any shape other than the ring shape, for example, light transmission. The shape of the portion 53c may be a frame shape.

D Speedometer (display device)
DESCRIPTION OF SYMBOLS 10 Circuit board 40 Pointer 41 Instruction part 42 Pointer cap 50 Display panel 51 Gap part 52 1st panel body 52a 1st translucent board | substrate 52b 1st half mirror layer (1st translucent part)
52c Display part 52d Background part 52e Extraction part 53 2nd panel body 53a 2nd translucent board | substrate 53b 2nd half mirror layer (2nd translucent part)
53c Light transmission part 53d Light shielding part 54 1st spacer member 55 2nd spacer member 80 Light source P Center point S1 1st light emission display part S2 2nd light emission display part

Claims (2)

A display panel having a display unit;
In a display device having a light source that illuminates the display unit,
The display panel includes first and second panel bodies arranged to face each other so as to have a predetermined gap portion,
The first panel body has a first semi-translucent portion having light transmissivity and light reflectivity on the front surface or the back surface of the first translucent substrate as the base material,
The second panel body has a second semi-transparent portion having light transmissivity and light reflectivity on the front surface or the back surface of the second translucent substrate serving as the base material,
In the first panel body, the display unit is provided on the front side of the first semi-translucent unit,
When the display panel is viewed from the viewer side, the second panel body receives light from the light source that transmits light from the light source to the second light-transmissive substrate, and light from the light source. A light-shielding portion that does not transmit to the second light-transmissive substrate is provided so as not to overlap the display portion;
The display device, wherein the light shielding portion is located behind the second semi-translucent portion. The first panel body is provided with a background portion that forms the background of the display portion on the front side of the first translucent portion,
2. The display device according to claim 1, wherein the light transmission portion is located behind a removal portion where the background portion is not formed when the display panel is viewed from the viewer side.

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