Key light guide plate capable of preventing light crosstalk of LED (light-emitting diode) lamp

Abstract

The utility model relates to a key light guide plate for preventing light-emitting diode (LED) light crosstalk, which comprises a rear cover, a printed board arranged on the rear cover, a panel connected with the rear cover and covering the printed board, keys arranged on the panel, LED lights arranged on the printed board, and indicator lights, the part, located in the key, of the light guide body is subjected to shading treatment, and a light insulation cover is arranged between the bottom of the light guide body and the indicator lamp. According to the utility model, the structure is simple, the man-machine effect is good, two light emitting colors can be easily realized on the same key in the actual use process, and the crosstalk phenomenon is avoided, so that the reliability of the product is improved, the application range is wide, and the application prospect is better.

Description

Technical Field

[0001] The utility model relates to a key light guide plate, in particular to a key light guide plate capable of preventing LED lamp string light. Background Art

[0002] At present, key light guide plates are needed in many military display products. Key light guide plates are important components of military equipment and are an important medium for realizing military equipment, equipment human-computer interaction, and information transmission.

[0003] The buttons on the key light guide plate are made of light-transmitting materials. After the surface is painted, the shape of the luminous text is engraved by etching. Some important buttons need to be inlaid with indicator lights (such as power buttons, switch buttons, etc.) to play a prompt, warning and eye-catching role. Generally speaking, the light color of the indicator light is different from the light color of the lettering on the button body. Figure 1 As shown, a button needs to emit two colors of light, so the indicator light needs to be shielded from light to prevent cross-lighting. Utility Model Content

[0004] In order to solve the above technical problems, the utility model proposes a key light guide plate for preventing LED light string light.

[0005] The technical problem to be solved by the utility model is achieved by the following technical solutions:

[0006] A key light guide plate for preventing LED lamp string light comprises a back cover, a printed circuit board arranged on the back cover, a panel connected to the back cover and covering the printed circuit board, keys arranged on the panel, LED lamps and indicator lights arranged on the printed circuit board, a light guide body is embedded in the key, the light guide body is located above the indicator light, the part of the light guide body located in the key is subjected to light shielding treatment, and a light shield is arranged between the bottom of the light guide body and the indicator light.

[0007] Preferably, a light guide embedding hole is provided on the button, and the light guide is embedded in the light guide embedding hole.

[0008] Preferably, the key is made of light-transmitting material and has text sprayed and etched on it.

[0009] Preferably, the light guide is made of light-transmitting material.

[0010] Preferably, the top and bottom of the light guide are light-transmitting surfaces.

[0011] The beneficial effects of the utility model are:

[0012] The utility model has a simple structure and good human-machine effect. In actual use, two light emitting colors can be easily realized on the same key without crosstalk, thereby improving the reliability of the product, having a wide range of applications and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0014] Figure 1 Schematic diagram of buttons with different light colors;

[0015] Figure 2 This is an axonometric diagram of the utility model;

[0016] Figure 3 It is a top view schematic diagram of the utility model;

[0017] Figure 4 for Figure 3 A cross-sectional schematic diagram in FIG.

[0018] Figure 5 This is a schematic diagram of the key structure of the utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the light guide of the utility model;

[0020] Figure 7 It is a schematic diagram of the principle of the utility model.

[0021] In the figure: 1. back cover; 2. printed circuit board; 3. panel; 4. button; 5. LED light; 6. indicator light; 7. light guide; 8. light shield; 9. light guide inlay hole. DETAILED DESCRIPTION

[0022] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figures 2 to 6 As shown, a key light guide plate for preventing LED light stringing includes a back cover 1, a printed circuit board 2, a panel 3, a key 4, an LED lamp 5, an indicator light 6, a light guide 7, and a light shield 8.

[0024] The back cover 1 is connected with the panel 3 to form a structural main body, which is used to carry the printed circuit board 2 and the button 4 to realize the product function and play a sealing and protective role. The printed circuit board 2 is arranged on the back cover 1, and plays the role of carrying the LED light 5, the indicator light 6 and other components to realize the circuit and optical functions of the product; the button 4 is arranged on the panel 3, and the button 4 is made of a light-transmitting material, and the text is etched after spraying paint to realize the light emission of the button. The button 4 is provided with a light guide inlay hole 9, and the light guide 7 is inlaid in the light guide inlay hole 9. The LED light 5 and the indicator light 6 are arranged on the printed circuit board 2, and the LED light 5 generates white light, and the indicator light 6 generates yellow light. The indicator light 6 is located directly below the light guide 7. The light guide 7 is made of a light-transmitting material, and the part inlaid in the light guide inlay hole 9 is subjected to light shielding treatment to prevent light from crossing, and the upper and lower surfaces of the light guide 7 are light-transmitting. The light shield 8 is disposed between the bottom of the light guide 7 and the indicator light 6. The light shield 8 prevents the white light emitted by the LED lamp 5 and the yellow light emitted by the indicator light 6 from crosstalk, and guides the yellow light emitted by the indicator light 6 into the bottom light inlet of the light guide 7. The light shield 8 is only used to cover the indicator light 6, and does not cover the LED lamp 5, so that while achieving light isolation, it can also simplify the structure, reduce the overall weight and reduce the manufacturing cost, and facilitate installation. In addition, the light shield 8 protects the LED lamp 5, improves the sealing, prevents dust and moisture from affecting the light effect of the LED lamp 5, and makes the luminous flux emitted by the LED lamp 5 constant, thereby improving the uniformity and brightness of the indicator light 6.

[0025] When in use, the white light emitted by the LED lamp 5 is blocked by the light shielding cover 8 and the light-shielding material outside the light guide 7, and cannot cross-talk to the indicator light 6 and the light guide 7, and passes through the transparent medium of the key 4 to emit light on the engraved surface. The yellow light emitted by the indicator light 6 passes through the light shield 8, and then through the upper and lower light-transmitting surfaces of the light guide 7, and is guided to the outer surface of the light guide 7, so that the key 4 is in a static or pressed state, and there is no crosstalk between lights of different colors. Figure 7 shown.

[0026] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and the specification only describe the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A key light guide plate for preventing LED light stringing, comprising a rear cover (1), a printed board (2) arranged on the rear cover (1), a panel (3) connected to the rear cover (1) and covering the printed board (2), a key (4) arranged on the panel (3), an LED light (5) arranged on the printed board (2), and an indicator light (6), characterized in that: A light guide (7) is embedded on the key (4), the light guide (7) is located above the indicator light (6), the portion of the light guide (7) located inside the key (4) is subjected to light shielding treatment, and a light shield (8) is provided between the bottom of the light guide (7) and the indicator light (6).

2. The key light guide plate for preventing LED light stringing according to claim 1, characterized in that: A light guide embedding hole (9) is provided on the key (4), and the light guide (7) is embedded in the light guide embedding hole (9).

3. The key light guide plate for preventing LED light stringing according to claim 1, characterized in that: The button (4) is made of a light-transmitting material and has text sprayed and etched on it.

4. The key light guide plate for preventing LED light stringing according to claim 1, characterized in that: The light guide (7) is made of light-transmitting material.

5. The key light guide plate for preventing LED light stringing according to claim 1, characterized in that: The top and bottom of the light guide (7) are light-transmitting surfaces.

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