CN201174339Y - Light guide module for keyboard and luminous keyboard - Google Patents

Abstract

The utility model discloses a leaded light module and luminous keyboard for keyboard, this leaded light module contain light guide plate, reflection of light piece and first colour space. The light reflecting sheet is positioned below the light guide plate; the first color zone is positioned between the light reflecting sheet and the light guide plate. Through first color space, the utility model discloses a light guide module can send the chromatic light.

Description

Light guide module and luminous keyboard for keyboard

technical field

The utility model relates to a light guide module, in particular to a light guide module used for a keyboard, which can be used as a luminous keyboard.

Background technique

With the increasing demands of users, the keyboard is no longer just providing a simple input interface, but the function of auxiliary input is also required. At present, there are keyboards with backlights on the market, which allow users to clearly understand the positions of keys under the backlight, and avoid input errors. There are also keyboards that can provide multi-color backlights on the market. In addition to the above-mentioned functions, they also have the function of providing specific keys to improve the auxiliary input function.

Please refer to FIG. 1 . FIG. 1 is a cross-sectional view illustrating a luminous keyboard 1 of the background art. The luminous keyboard 1 has a light guide plate 16 , a base plate 13 , a key 14 , an elastic body 15 , a membrane switch layer 19 , a reflective sheet 17 and a light-shielding sheet 18 . The elastic body 15 includes an actuating column 150 , and when the user presses the key 14 , the elastic body 15 is pressed by the key 14 . Further, the actuating column 150 presses the membrane switch layer 19 to make the circuit in the membrane switch layer 19 conduct, and the light-emitting keyboard 1 sends a specific signal corresponding to the key 14 to the computer host. After the user releases the button 14 , the button 14 can return to its original position through the elastic restoring force of the elastic body 15 . In addition, the bottom plate 13 is used to support the key 14 and includes a light-transmitting area 130 directly below the key 14 .

The light-shielding sheet 18 has a light-transmitting portion 180 , and different light-transmitting portions 180 are painted with different colors. When the light source enters the light guide plate 16 , part of the light is reflected back to the light guide plate 16 through the reflective sheet 17 , and part of the light is transmitted inside the light guide plate 16 . Afterwards, the light is led out by the light guide plate 16 to pass through the light-shielding sheet 18 to generate colored light, and the colored light then passes through the light-transmitting area 130 of the bottom plate 13 and finally reaches the key 14 . Furthermore, the luminous keyboard 1 can emit multiple colors of light. As can be seen from FIG. 1 , in this way, an additional component (ie, a light-shielding film 18 ) must be used to achieve multiple-color backlights. However, the more assembled parts, in addition to increasing the cost of parts, usually means more assembly errors and higher failure rates.

Utility model content

The main purpose of the utility model is to provide a light guide module, which can emit various colors of light, and can be used in a keyboard, making it a light-emitting keyboard, so as to solve the above problems.

The purpose of the utility model is achieved by providing a light guide module for a keyboard, which includes a light guide plate, a reflective sheet and a first color zone. The reflective sheet is located under the light guide plate; the first color zone is located between the reflective sheet and the light guide plate.

The utility model also provides a luminous keyboard, which includes a light guide plate, a light source, a plurality of keys, a reflective sheet and a first color area. The light source is used to emit light and enter the light guide plate; multiple keys are located on the light guide plate; the reflective sheet is located under the light guide plate; the first color zone is located between the reflective sheet and the light guide plate.

In addition, both the light guide module and the light-emitting keyboard of the present invention can further include a second color zone, and the second color zone is located between the reflective sheet and the light guide plate. The color of the second color zone is different from the color of the first color zone.

The utility model has the advantages that the light guide module and its light-emitting keyboard can emit multiple colors of light, presenting multi-color visual effects, and the assembly cost is low.

The advantages and spirit of the present utility model can be further understood through the following detailed description of the utility model and the accompanying drawings.

Description of drawings

FIG. 1 is a cross-sectional view illustrating a luminous keyboard according to the background technology;

FIG. 2A is an exploded view illustrating a luminous keyboard according to a preferred embodiment of the present invention;

FIG. 2B is a schematic diagram illustrating a light source incident on the light guide module in FIG. 2A .

Description of main component symbols

1, 2: Illuminated keyboard 18: Shading sheet

22: Light source 13, 23: Bottom plate

14, 24: Buttons 26: Light guide module

180: Translucent part 230: The first translucent area

15, 25: Elastomer 240: Second light transmission area

17, 260: Reflective sheet 262: The first color zone

16. 264: Light guide plate 266: Second color zone

150: Actuating column 130: Translucent area

19: Membrane switch layer

Detailed ways

Please refer to FIG. 2A . FIG. 2A is an exploded view of a luminous keyboard 2 according to a preferred embodiment of the present invention. As shown in FIG. 2A , the luminous keyboard 2 includes a light guide plate 264 , a light source 22 , a bottom plate 23 , a plurality of keys 24 , an elastic body 25 , a reflective sheet 260 , a first color zone 262 and a second color zone 266 . The elastic body 25 is used to support the button 24 and provide an elastic restoring force, and its function is the same as that of the elastic body 15 (as shown in FIG. 1 ) described in the background art, and will not be repeated here.

In this embodiment, the light source 22 can be a light emitting diode (Light Emitting Diode, LED), but the utility model is not limited thereto, and the light source 22 can also be other illuminants. The light source 22 is used to emit light and enter the light guide plate 264 from one side of the light guide plate 264; the button 24 is located on the light guide plate 264; the reflective sheet 260 is located under the light guide plate 264; between the sheet 260 and the light guide plate 264 . It should be noted that the set of the light guide plate 264 , the reflective sheet 260 , the first color zone 262 and the second color zone 266 can be referred to as the light guide module 26 of the luminous keyboard 2 .

In this embodiment, the button 24 has a second light-transmitting area 240 , and the bottom plate 23 has a first light-transmitting area 230 . In actual product design, the first transparent region 230 may be a through hole. When the light is guided out from the light guide plate 264 , it can pass through the first light-transmitting area 230 , the elastic body 25 and the second light-transmitting area 240 of the key 24 in sequence. The elastic body 25 can be made of a transparent or translucent material, so that the light can directly pass through the elastic body 25 to reach the second light-transmitting area 240 of the key 24, or the light can be diffused by the elastic body 25 to illuminate around the key 24 and let it pass through the second light-transmitting area 240 of the key 24. The light in the second light-transmitting area 240 is relatively soft. If the second light-transmitting area 240 is the symbols and letters on the key 24, such as the number "4" on the key 24 in FIG. 2A, the area of "4" can emit light. Therefore, when the ambient light source is weak, the luminous keyboard 2 makes different keys easy to distinguish, which is convenient for the user to input data. It should be added that if the bottom plate 23 is made of a light-transmitting material, the first light-transmitting region 230 may be in the form of a through hole. The area of the bottom plate 23 outside the first light-transmitting area 230 is also designed to allow some light to pass through, so as to provide a backlight effect relative to the first light-transmitting area 230 .

In this embodiment, the color of the second color zone 266 is different from the color of the first color zone 262, and the use of the light guide module 26 can present more than one color light, the more color zones of different colors, the overall color and visual effect better. Of course, if only monochromatic light is required, the color of the second color area 266 is the same as that of the first color area 262 . In addition, the first color zone 262 and the second color zone 266 can be color chips made of plastic material or glass material, or a large color chip with multiple color zones can be manufactured, and the first color zone 262 and the second color zone 266 are two areas in the large color chip. The color zone can be square (shown in FIG. 2A ), circular, triangular or other shapes. Generally speaking, the shape of the color zone is related to the shape of the second light-transmitting zone 240 of the key 24; the size of the color zone is related to the distance from the light source 22 Controlling the size of the color zone can balance the amount of light reflected or refracted by different areas. Usually, the one closer to the light source 22 has a smaller area. For example, the area of the first color zone 262 is slightly smaller than the area of the second color zone 266 . As shown in Figure 2A.

In addition, the first color area 262 and the second color area 266 can also be colored materials, and are printed on the reflective sheet 260 or the light guide plate 264 . Since the printing technology is very mature, if it is necessary to print a single color or a color area of multiple colors on the reflective sheet 260, a printing step can be added to the production line for manufacturing the reflective sheet 260 or the light guide plate 264 to produce a single-color reflector. Or the reflective sheet 260 or the light guide plate 264 of the color zone of multiple colors. In addition to the printing method, electroplating, coating, spraying, inkjet or other coloring methods can also be used, for example: using a spray with a mask, the size and shape of the required color area can be sprayed on the reflective sheet 260 or the light guide plate 264 It can also be added to the production line of the reflective sheet 260 or the light guide plate 264.

Please refer to FIG. 2B . FIG. 2B is a schematic diagram illustrating the light source 22 incident on the light guide module 26 in FIG. 2A . As shown in FIG. 2B , light emitted by the light source 22 enters the light guide plate 264 of the light guide module 26 . After the light enters the light guide plate 264 in different directions, the light can be refracted and reflected on the surface of the light guide plate 264, and part of the refracted light can enter the second color zone 266, and then the reflective sheet 260 reflects the light back to the light guide plate 264, and then is exported from the light guide plate 264. The color shade associated with the second color zone 266 . For example, if the incident light is white light and the color of the second color region 266 is red, the light reflected back to the light guide plate 264 is red light. It should be noted that the first color zone 262 and the second color zone 266 in FIG. 2B are arranged horizontally, but the arrangement of the color zones is not limited to this, and it is not necessary to be adjacent. The color zones can also be arranged vertically to obtain different colors. The combination of the color zones of a color, generally speaking, after the color zones of two different colors are superimposed, the overlapping area is the color zone of another color.

It should be mentioned that the light path in FIG. 2B does not mean that the first color region 262 is opaque, but the second color region 266 is. FIG. 2B only provides an example of the light path, and the present invention is not limited thereto. Moreover, it is not necessary for the first color zone 262 and the second color zone 266 of the present invention to be transparent or not.

In addition, the light source 22 can be a white LED or LED of other colors, or even a composite LED. By controlling the color light types that can be emitted by the light source 22, the same color zone can also produce light of different colors. One color area 262 , when blue light enters the second color area 266 , the light reflected from the two same color areas are different in color. Therefore, the arrangement and color selection of the light sources 22 can also be controlled to generate more colored lights of different colors.

Please refer to Figure 1 and Figure 2A. In the light-emitting keyboard 1 shown in FIG. 1 , the light-transmitting portion 180 is disposed between the light guide plate 16 and the keys 14 . Compared with FIG. 1 , the luminous keyboard 2 of the present invention places the first color zone 262 and the second color zone 266 (similar to the light-transmitting part 180 in FIG. 1 ) between the light guide plate 264 and the reflective sheet 260, Therefore, when the light guide module 26 is combined with other components of the luminous keyboard 2 , the first color area 262 and the second color area 266 are not easily damaged.

To sum up, the light guide module and its light-emitting keyboard of the present invention can emit multiple colors of light, presenting multi-color visual effects.

Claims (12)

1. A light guide module for a keyboard, characterized by comprising: a light guide plate; a reflective sheet located under the light guide plate; and a first color zone located between the reflective sheet and the light guide plate. 2. The light guide module according to claim 1, further comprising a second color zone located between the reflective sheet and the light guide plate, wherein the color of the second color zone is different from that of the first color zone s color. 3. The light guide module according to claim 1, wherein the first color zone is printed on the reflective sheet. 4. The light guide module according to claim 1, wherein the first color area is printed on the light guide plate. 5. The light guide module according to claim 1, wherein the first color region is a color chip. 6. A light-emitting keyboard, characterized in that it comprises: a light guide plate; a light source for emitting a light incident on the light guide plate; a plurality of keys located on the light guide plate; a reflective sheet located under the light guide plate; and The first color zone is located between the reflective sheet and the light guide plate. 7. The luminous keyboard according to claim 6, further comprising a second color zone located between the reflective sheet and the light guide plate, wherein the color of the second color zone is different from that of the first color zone color. 8. The luminous keyboard as claimed in claim 6, wherein the first color area is transparent. 9. The luminous keyboard as claimed in claim 6, wherein the first color zone is printed on the reflective sheet. 10. The luminous keyboard as claimed in claim 6, wherein the first color zone is printed on the light guide plate. 11. The luminous keyboard as claimed in claim 6, wherein the first color region is a color chip. 12. The luminous keyboard as claimed in claim 6, wherein the key has a light-transmitting area.

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