CN104201032B - Illuminated keyboard - Google Patents

Abstract

The invention provides a luminous keyboard, which has a plurality of luminous keys, which includes: a light guide plate; an X-axis LED board, which is arranged at a position adjacent to the first X-axis side of the light guide plate. The X-axis LED illuminant that emits light in the direction of the second X-axis side of the light guide plate will form a first dark area and a second dark area on the light guide plate; the first Y-axis LED board and the second Y-axis LED board are located on the Adjacent to the position of the X-axis LED board of the light guide plate, the two have respectively a first Y-axis LED illuminant and a second Y-axis LED illuminant that can emit light toward the first dark area and the second dark area, and are used to illuminate the first and second dark areas. A dark area and a second dark area. The invention is based on the Y-axis LED illuminant, which provides light to the dark area on the light guide plate that is not covered by the light emitting angle range of the LED illuminant set on the X-axis, so as to reduce the range of the dark area on the light guide plate and improve the overall keyboard keys. Visibility in dimly lit environments.

Description

illuminated keyboard

technical field

The invention relates to a keyboard, in particular to a luminous keyboard with a plurality of luminous bodies on the Y axis.

Background technique

Due to the excellent information processing ability of the computer, it has already become an important tool in people's life or work in modern times, and the keyboard is an indispensable accessory for the use of the computer. The operation of the keyboard is often affected by the light intensity in the use environment. When the keyboard When operating in a dim environment with low light intensity, the user may not be able to see the identification symbols marked on each key on the keyboard, which makes it difficult for the user to operate the keyboard.

Therefore, there is a design of a luminous keyboard. Please refer to FIG. 1 a , which is a schematic diagram of the main layers of a conventional luminous keyboard. As shown in FIG. 1 a , the conventional luminous keyboard 2 includes a key set 20 , a metal base layer 25 , a light shielding layer 23 , a light guide plate 24 , a reflector plate 26 and a light source set 22 from top to bottom. Among them, the button group 20 has a plurality of buttons 21, and the light guide plate 24 is arranged under the button group 20, and is used as a light guiding medium, which allows the light to be totally reflected and transmitted, and the diffusion points coated on it The pattern destroys the total reflection of light at a specific position, and guides the light to the front of the light guide plate 24 to make the keys 21 of the key set 20 emit light, so as to highlight the identification symbols of the keys 21 through light in a dark operating environment.

Please refer to Fig. 1 b, by the setting of LED (light emitting diode, hereinafter all described by LED) illuminants 221, 222 and light guide plate 24 of light source group 22, the identification symbols on keyboard keys 21 are illuminated, allowing users to In a dim operating environment with weak light intensity, confirm the function and location of each button 21 . However, the setting of LED illuminants in the keyboard is often limited by various factors (for example, the internal space of the keyboard that allows LED illuminants to be set is limited, or in order to reduce manufacturing costs, it is desirable to have more LED illuminants. The less the better, or the smaller the area of the circuit board where the LED luminous body is set, the better), so it is impossible to arbitrarily closely arrange a large number of LED luminous bodies in the keyboard, so that the adjacent LED luminous bodies in the keyboard must be separated by a certain distance. a certain distance.

In the conventional luminous keyboard, a plurality of LED luminous bodies are arranged on a strip-shaped circuit board, and emit light in a direction approximately perpendicular to the long axis of the circuit board. Because the light emission angles of general LED luminous bodies are all less than 180 degrees, so when the adjacent LED luminous bodies 221, 222 are spaced apart from each other, a relatively weakly illuminated area 242 (that is, not illuminated by any LED) will be produced in the light guide plate 24. The area covered by the fan-shaped light emitting angle range in front of the object, also known as the dark area). In the keyboard shown in FIG. 1b, the key transmissive identification symbol "Ctrl" in the strong illumination area 241 is located within the fan-shaped light emitting angle range of at least one LED illuminant, so the identification symbol "Ctrl" can emit light with relatively high brightness. . However, the key light transmission identification symbol "Alt" in the weakly illuminated area 242 is not covered by the light emission angle range of any LED illuminant, so the light in the light guide plate 24 needs to be transmitted over a long distance or reflected many times. , it will reach the identification symbol "Alt"; so the luminous brightness of the identification symbol "Alt" will be much weaker. This will affect the identifiability of the keyboard keys in a dark environment, and make the user feel that the luminance of the key identification symbols in different areas of the overall keyboard is inconsistent.

Therefore, how to eliminate the weakly illuminated areas in the luminous keyboard under the prerequisite of using a small number of LED illuminants, so as to improve the uniformity of the overall luminous effect of the keyboard keys, is now a technical issue that the industry is eager to challenge and overcome. .

Contents of the invention

In order to solve the above problems, the present invention proposes a luminous keyboard with a plurality of luminous bodies on the Y axis.

A luminous keyboard of the present invention has a plurality of luminous keys, and the luminous keyboard includes:

The light guide plate at least includes two opposite first X-axis sides and second X-axis sides, and two opposite first Y-axis sides and second Y-axis sides, so as to define the light guide plate into a rectangular shape, and the light guide plate is located on The bottom of the plurality of luminous keys is used to conduct light to make the plurality of luminous keys emit light;

The X-axis LED board is located adjacent to the first X-axis side of the light guide plate and extends along the first X-axis side. The X-axis LED board has at least three LEDs that can respectively face the second X-axis side of the light guide plate. The X-axis LED luminous body emitting light in a direction, the light guide plate defines a first dark area and a second dark area in the area not covered by the light emission angle range of the at least three X-axis LED illuminants;

The first Y-axis LED board is located at the position adjacent to the X-axis LED board of the light guide plate, and the first Y-axis LED board has a first Y-axis LED illuminant that can emit light toward the first dark area of the light guide plate. to illuminate the first dark area; and

The second Y-axis LED board is arranged at the position adjacent to the X-axis LED board of the light guide plate, and the second Y-axis LED board has a second Y-axis LED illuminant capable of emitting light toward the second dark area of the light guide plate, for use to illuminate the second dark area.

As a preferred solution, the X-axis LED board, the first Y-axis LED board and the second Y-axis LED board are arranged separately or combined to form a single structure.

As a preferred solution, the X-axis LED board, the first Y-axis LED board and the second Y-axis LED board are arranged in an "F-shape", "U-shape" or "TT-shape".

As a preferred solution, the first X-axis side and the second X-axis side are the long side or short side of the light guide plate; the first Y-axis side and the second Y-axis side are different from the first Y-axis side A long side or a short side of an X-axis side and the second X-axis side.

As a preferred solution, the first Y-axis LED board and the second Y-axis LED board are disposed between the first X-axis side and the X-axis LED board on the light guide plate.

As a preferred solution, the first Y-axis LED board and the second Y-axis LED board are disposed between the second X-axis edge and the X-axis LED board on the light guide plate.

As a preferred solution, the first Y-axis LED light emitter emits light toward the second Y-axis side of the light guide plate, and the second Y-axis LED light emitter emits light toward the first Y-axis side of the light guide plate.

As a preferred solution, the first Y-axis LED light emitter and the second Y-axis LED light emitter emit light toward the first Y-axis side or the second Y-axis side of the light guide plate.

As a preferred solution, the light output angle range of the first Y-axis LED illuminant is a first sector, the first sector has a first centerline, and the first centerline forms a first angle with the centerline of the X-axis LED board .

As a preferred solution, the light output angle range of the second Y-axis LED illuminant is a second sector, the second sector has a second centerline, and the second centerline forms a second angle with the centerline of the X-axis LED board .

As a preferred solution, the first included angle is the same as the second included angle.

Compared with the prior art, the luminous keyboard of the present invention utilizes the LED luminous body arranged on the Y axis to provide light to the dark area on the light guide plate that is not covered by the emitting angle range of the LED luminous body arranged on the X axis, so as to reduce the light guide. The scope of the dark area on the light board improves the overall recognition of the keyboard keys in a dim environment. Therefore, the number of LED luminous bodies arranged on the X-axis of the luminous keyboard of the present invention can be greatly reduced, so as to reduce the manufacturing cost of the luminous keyboard.

Description of drawings

Fig. 1a is an exploded view of the main layers of a conventional luminous keyboard.

FIG. 1 b is a schematic diagram of a weakly illuminated area in a conventional luminous keyboard.

2 to 5 are schematic diagrams of four embodiments when the X-axis LED board of the light-emitting keyboard of the present invention is arranged adjacent to the first X-axis side;

Fig. 6 is a schematic diagram of relative light emission of the first Y-axis LED illuminant and the second Y-axis LED illuminant in another embodiment of the luminous keyboard of the present invention;

7 is a schematic diagram of an embodiment in which the X-axis LED board of the light-emitting keyboard of the present invention is arranged on the short side of the light guide plate;

Fig. 8 to Fig. 11 are four types of light-emitting keyboards according to the present invention when the center line P of the fan-shaped area where the first Y-axis LED illuminant and the second Y-axis LED illuminant emit light is deflected at a certain angle relative to the X-axis LED board center line Q. Example schematic diagram;

Fig. 12 and Fig. 13 are the luminous keyboard of the present invention when the center line P of the fan-shaped area where the first Y-axis LED illuminant and the second Y-axis LED illuminant emit light is deflected by a certain angle relative to the X-axis LED board center line Q. The schematic diagram of the axis LED illuminant and the second Y-axis LED illuminant facing and opposite to each other;

FIG. 14 is a schematic diagram of an embodiment in which the X-axis LED board of the light-emitting keyboard of the present invention is arranged on the short side of the light guide plate.

【Symbol Description】

11 light guide plate

111 First X-axis edge

112 Second X-axis edge

113 First Y axis edge

114 Second Y axis edge

115 First Dark Area

116 Second Dark Area

12X axis LED board

121, 122, 123 X-axis LED light emitter

13 first Y-axis LED board

131 first Y-axis LED illuminant

14 Second Y-axis LED board

141 Second Y-axis LED light emitter

21 buttons

22 light source groups

221, 222 LED illuminants

23 shading layer

24 light guide plate

25 metal backplane layers

26 reflectors

241 strong light area

242 weaker light areas

detailed description

In order to have a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed descriptions are provided in conjunction with the embodiments.

The following content will be combined with drawings to illustrate the technical content of the present invention through specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various modifications and changes may be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. In particular, the proportions and relative positions of various elements in the drawings are for exemplary purposes only, and do not represent the actual implementation of the present invention.

In order to solve the problem of deriving relatively weakly illuminated areas (also known as dark areas) in the light guide plate due to the limited light emitting angle of the LED illuminant in the luminous keyboard, the present invention provides a luminous keyboard, which has a light emitting device that can emit light toward the above-mentioned weakly illuminated area. The LED illuminant is used to reduce the scope of the weakly illuminated area of the light guide plate. As shown in FIGS. 2 to 14 according to the present invention, the light-emitting keyboard in each embodiment of the present invention includes a light guide plate 11 , an X-axis LED board 12 , a first Y-axis LED board 13 and a second Y-axis LED board 14 .

The light guide plate 11 includes at least two opposite first X-axis sides 111 and second X-axis sides 112, and two opposite first Y-axis sides 113 and second Y-axis sides 114. The four sides define a rectangular shape. Shaped light guide plate. The first X-axis side 111 and the second X-axis side 112 can be the long sides (as shown in FIGS. 2 to 6 and FIGS. 8 to 13 ) or short sides (as shown in FIGS. 7 and 14 ) of the rectangular shape of the light guide plate 11 , Correspondingly, the first Y-axis side 113 and the second Y-axis side 114 can be long sides or short sides different from the first X-axis side 111 and the second X-axis side 112 in the rectangular shape of the light guide plate 11 .

The X-axis LED board 12 is disposed adjacent to the first X-axis side 111 of the light guide plate 11 and extends along the first X-axis side 111 . The X-axis LED board 12 has at least three X-axis LED light emitters 121 , 122 , 123 that can emit light toward the second X-axis side 112 of the light guide plate 11 . Since the light emitting angle provided by the LED illuminants is limited, in the light guide plate, between two LED illuminants, the area not covered by any LED illuminant's fan-shaped light emitting angle range will form a dark area. Hereinafter, the areas in the light guide plate 11 not covered by any fan-shaped light emitting angle range of the X-axis LED illuminants 121 , 122 , 123 are defined as the first dark area 115 and the second dark area 116 .

The first Y-axis LED board 13 extends from the X-axis LED board 12 and is adjacent to the position of the X-axis LED luminous body 121; the first Y-axis LED board 13 has a first Y-axis LED luminous body 131, and the first Y-axis LED emits light The body 131 can emit light toward the first dark area 115 of the light guide plate 11 to illuminate the first dark area 115, so as to reduce or even eliminate the range of the first dark area 115, so that the keys above the first dark area 115 of the light guide plate 11 It can receive enough light energy and emit enough brightness for people to observe the button to emit light.

The second Y-axis LED board 14 extends from the X-axis LED board 12 and is adjacent to the position of the X-axis LED luminous body 122; the second Y-axis LED board 14 has a second Y-axis LED luminous body 141, and the second Y-axis LED emits light The body 141 can emit light toward the second dark area 116 of the light guide plate 11 to illuminate the second dark area 116, so as to reduce or even eliminate the range of the second dark area 116, so that the keys above the second dark area 116 of the light guide plate 11 It can receive enough light energy and emit enough brightness for people to observe the button to emit light.

In the present invention, the light-emitting directions of the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 can be adjusted according to the positions of the first dark area 115 and the second dark area 116 respectively, so as to improve the illumination Effects of the first dark area 115 and the second dark area 116 . For example, as shown in Fig. 2 to Fig. 5 (compared with Fig. 2 and Fig. 3 in Fig. 4 and Fig. 5, only the labels of the first X-axis side and the second X-axis side are exchanged to show that in practical applications, The first X-axis side can be one of the upper edge or the lower edge of the light guide plate, and the second X-axis side is its opposite edge.Similarly, the difference between Fig. 10 and Fig. 11 and Fig. 8 and Fig. 9 is also This is the case, so it will not be described in detail), the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 both emit light in the direction of the second Y-axis side 114 of the light guide plate 11 . In practical applications, the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 can be selected to make the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 face the first Y-axis of the light guide plate 11 according to the positions of the first dark area 115 and the second dark area 116 The direction of the side 113 emits light, and should not be limited to what is shown in the figure. In addition, in the embodiment shown in FIG. 6 , the first Y-axis LED luminous body 131 emits light toward the second Y-axis side 114 of the light guide plate 11, and the second Y-axis LED luminous body 141 emits light toward the second Y-axis side 114 of the light guide plate 11. A Y-axis edge 113 direction emits light.

As shown in Figures 8 to 14, the centerline P of the fan-shaped area where the first Y-axis LED illuminant 131 and the second Y-axis LED illuminant 141 emit light has a value greater than zero with the centerline Q of the X-axis LED board 12. Angle θ. That is, the centerline P of the fan-shaped area where the first Y-axis LED illuminant 131 emits light is rotated by an angle of θ in the direction of the first dark area 115 from the embodiment in FIG. 2 parallel to the direction of the centerline Q of the X-axis LED panel 12, so The fan-shaped area from which the first Y-axis LED illuminant 131 emits light can more completely cover the first dark area 115 to provide illumination. Similarly, the centerline P of the fan-shaped area where the second Y-axis LED illuminant 141 emits light is rotated by an angle of θ in the direction of the second dark area 116 from the embodiment in FIG. 2 parallel to the X-axis LED panel 12 centerline Q direction . In this embodiment, preferably, the two angles at which the center line P of the fan-shaped area where the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 emit light are deflected relative to the center line Q of the X-axis LED panel are The same, but not limited thereto, in practical applications, the two included angles corresponding to the first Y-axis LED light emitter 131 and the second Y-axis LED light emitter 141 may also be different.

It should be noted that, in the embodiment of the present invention, the X-axis LED board 12, the first Y-axis LED board 13 and the second Y-axis LED board 14 can be arranged separately, or these three can be combined and arranged as Single board structure.

In addition, in order to adapt to the allowable installation space inside the keyboard, the X-axis LED board 12, the first Y-axis LED board 13 and the second Y-axis LED board 14 can be arranged as a whole to form a "substantially F-shaped" (see FIGS. 2 to 5, Figures 7 to 11 and Figure 14), "substantially U-shaped" (see Figure 6 and Figure 12), or "substantially TT-shaped" (see Figure 13) shape, which is mainly through The positions of the first Y-axis LED board 13 and the second Y-axis LED board 14 relative to the X-axis LED board 12 are different, and the light emitting directions of the first Y-axis LED board 13 and the second Y-axis LED board 14 are opposite or opposite. formed in the back. As shown in FIG. 2 , the first Y-axis LED board 13 and the second Y-axis LED board 14 are located between the first X-axis edge 111 and the X-axis LED board 12 on the light guide plate 11, but not limited thereto. The first Y-axis LED board 13 and the second Y-axis LED board 14 can also adapt to the installation space allowed by the keyboard, and are arranged on the light guide plate 11 between the second X-axis side 112 and the X-axis LED board 12, as shown in Figure 3 , as shown in FIG. 9 , making the layout of the entire luminous keyboard more flexible.

To sum up, the luminous keyboard of the present invention utilizes the LED luminous body arranged on the Y axis to provide light to the dark area on the light guide plate that is not covered by the light emitting angle range of the LED luminous body arranged on the X axis, so as to reduce the The scope of the dark area improves the overall recognition of the keyboard keys in a dim environment. Therefore, the number of LED luminous bodies arranged on the X-axis of the luminous keyboard of the present invention can be greatly reduced, so as to reduce the manufacturing cost of the luminous keyboard.

The present invention has been described by the above-mentioned related embodiments, but the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention all belong to the scope of patent protection of the present invention.

Claims (11)

1. A luminous keyboard has a plurality of luminous keys, characterized in that the luminous keyboard comprises: The light guide plate at least includes two opposite first X-axis sides and second X-axis sides, and two opposite first Y-axis sides and second Y-axis sides, so as to define the light guide plate into a rectangular shape, and the light guide plate is located on The bottom of the plurality of luminous keys is used to conduct light to make the plurality of luminous keys emit light; The X-axis LED board is located adjacent to the first X-axis side of the light guide plate and extends along the first X-axis side. The X-axis LED board has at least three LEDs that can respectively face the second X-axis side of the light guide plate. The X-axis LED luminous body emitting light in a direction, the light guide plate defines a first dark area and a second dark area in the area not covered by the light emission angle range of the at least three X-axis LED illuminants; The first Y-axis LED board is located at the position adjacent to the X-axis LED board of the light guide plate, and the first Y-axis LED board has a first Y-axis LED illuminant that can emit light toward the first dark area of the light guide plate. to illuminate the first dark area; and The second Y-axis LED board is arranged at the position adjacent to the X-axis LED board of the light guide plate, and the second Y-axis LED board has a second Y-axis LED illuminant capable of emitting light toward the second dark area of the light guide plate, for use to illuminate the second dark area. 2 . The luminous keyboard according to claim 1 , wherein the X-axis LED board, the first Y-axis LED board and the second Y-axis LED board are arranged separately or combined to form a single structure. 3. The luminous keyboard as claimed in claim 1, characterized in that the X-axis LED board, the first Y-axis LED board and the second Y-axis LED board form "F shape", "U shape" or "TT shape "shape arrangement. 4. The luminous keyboard according to claim 1, wherein the first X-axis side and the second X-axis side are the long side or the short side of the light guide plate; the first Y-axis side and the second Y-axis side The axial side is the long side or short side of the light guide plate which is different from the first X-axis side and the second X-axis side. 5. The luminous keyboard according to claim 1, wherein the first Y-axis LED board and the second Y-axis LED board are arranged on the light guide plate between the first X-axis side and the X-axis LED board Location. 6. The luminous keyboard according to claim 1, wherein the first Y-axis LED board and the second Y-axis LED board are arranged on the light guide plate between the second X-axis side and the X-axis LED board Location. 7. The luminous keyboard according to claim 1, wherein the first Y-axis LED illuminant emits light toward the second Y-axis side of the light guide plate, and the second Y-axis LED luminous body emits light toward the first Y-axis side of the light guide plate. Lights up along the Y axis. 8 . The luminous keyboard according to claim 1 , wherein the first Y-axis LED light emitter and the second Y-axis LED light emitter emit light toward the first Y-axis side or the second Y-axis side of the light guide plate. 9. The luminous keyboard according to claim 1, characterized in that the light emission angle range of the first Y-axis LED illuminant is a first fan-shaped, the first fan-shaped has a first centerline, and the first centerline and the X The center line of the axial LED board forms a first included angle. 10. The luminous keyboard according to claim 9, characterized in that the light output angle range of the second Y-axis LED illuminant is a second sector, the second sector has a second centerline, and the second centerline is in line with the X The center line of the axial LED board forms a second included angle. 11. The luminous keyboard as claimed in claim 10, wherein the first included angle is the same as the second included angle.