Button film panel structure

Abstract

According to the key film panel structure, the first adhesive layer and the key film are arranged to be colorless and transparent, lamplight sequentially passes through the key film layer, the first adhesive layer and the key area, so that key patterns on the key area have a light emitting effect, the second hollow area is formed in the first adhesive layer, installation of a light sensation FPC is facilitated, and the key film panel structure is simple in structure and convenient to use. The key film is provided with the third hollowed-out area, installation of the light-sensitive IC is facilitated, the light-sensitive IC can sense the light intensity of the environment through the arrangement that the sensing face of the light-sensitive IC is right opposite to the first light hole and the first hollowed-out area, and then the light-sensitive FPC is connected with the key film and the light-sensitive IC, so that the light intensity of the environment can be sensed. The key film panel can adjust the brightness of the key according to the light intensity of the environment, so that a user can clearly see the key pattern on the key film panel under the condition that the light of the environment is relatively dark.

Description

Technical Field

[0001] The utility model relates to the technical field of touch screens, and particularly to a key membrane panel structure. Background Art

[0002] A key membrane panel, also known as a membrane key or a metal dome conductive film, is an operating panel that integrates elements such as graphics, text, logos, transparent windows, and displays on a flexible plastic material through technologies such as screen printing and UV printing. The key membrane panel has the characteristics of good feel, low cost, simple process, and long service life, and is widely used in the operating panels of mechanical industrial equipment, mobile phones, Internet phones, various remote controls, etc. However, in existing products, in the case of relatively dim ambient light, users cannot easily see the keys on the key membrane panel, causing great inconvenience to users. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a key membrane panel structure.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A key membrane panel structure includes: a glass cover plate, a light-shielding ink layer, a first adhesive layer, and a key membrane arranged in sequence. The light-shielding ink layer is provided with a first hollowed-out area and a plurality of key areas. The first adhesive layer is provided with a second hollowed-out area. A light-sensitive FPC is arranged on the second hollowed-out area. The light-sensitive FPC is provided with a first light-transmitting hole. The key membrane is provided with a third hollowed-out area. A light-sensitive IC is arranged on the third hollowed-out area. The sensing surface of the light-sensitive IC is arranged opposite to the first light-transmitting hole and the first hollowed-out area. The light-sensitive FPC is respectively connected to the key membrane and the light-sensitive IC.

[0006] In one embodiment, it further includes a diffusion film, and the diffusion film is arranged on the side of the key membrane away from the first adhesive layer.

[0007] In one embodiment, a second adhesive layer is arranged between the diffusion film and the key membrane. The second adhesive layer is provided with a fourth hollowed-out area, and the fourth hollowed-out area is arranged opposite to the key area.

[0008] In one embodiment, the second adhesive layer is a black double-sided adhesive layer.

[0009] In one embodiment, a semi-transparent ink layer is arranged on the side of the first hollowed-out area and the key area away from the glass cover plate.

[0010] In one embodiment, the light-shielding ink layer is black ink.

[0011] In one embodiment, a PI reinforcing plate is disposed on the second hollowed-out area.

[0012] In one embodiment, a second light-transmitting hole is formed in the PI reinforcing plate, and the second light-transmitting hole is arranged in alignment with the first light-transmitting hole.

[0013] In one embodiment, an insertion interface is disposed on the key film.

[0014] In one embodiment, a PI reinforcing piece is disposed on the key film, and the PI reinforcing piece is arranged on one side of the insertion interface.

[0015] Compared with the prior art, the present utility model has at least the following advantages:

[0016] In a key film panel structure of the present utility model, the first adhesive layer and the key film are set to be colorless and transparent, and light passes through the key film layer, the first adhesive layer and the key area in sequence, so that the key pattern on the key area has a light-emitting effect. A second hollowed-out area is formed in the first adhesive layer to facilitate the installation of the light-sensitive FPC. A third hollowed-out area is formed in the key film to facilitate the installation of the light-sensitive IC. By arranging the sensing surface of the light-sensitive IC to face the first light-transmitting hole and the first hollowed-out area, the light-sensitive IC can sense the light intensity of the environment. Then, the light-sensitive FPC is connected to the key film and the light-sensitive IC respectively, so that the key film panel can adjust the brightness of the keys according to the light intensity of the environment, so that the user can clearly see the key pattern on the key film panel in the case of relatively dim ambient light. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the embodiments will be briefly introduced below.

[0018] Figure 1 It is a schematic structural view of a key film panel in an embodiment of the present utility model;

[0019] Figure 2 It is another schematic structural view of a key film panel in an embodiment of the present utility model.

[0020] Description of the drawings: 10, membrane keypad panel; 100, glass cover plate; 200, light-shielding ink layer; 300, first adhesive layer; 400, membrane keypad; 210, first hollow area; 220, keypad area; 310, second hollow area; 320, photosensor FPC; 321, first light-transmitting hole; 410, third hollow area; 420, photosensor IC; 500, diffusion film; 600, second adhesive layer; 700, semi-transparent ink layer; 311, PI reinforcement plate; 312, second light-transmitting hole; 430, insertion interface; 440, PI reinforcement piece; Detailed implementation manners

[0021] For the convenience of understanding the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings.

[0022] Please refer to Figure 1 and Figure 2 , a membrane keypad panel structure 10, comprising: a glass cover plate 100, a light-shielding ink layer 200, a first adhesive layer 300 and a membrane keypad 400 arranged in sequence. The light-shielding ink layer 200 is provided with a first hollow area 210 and a plurality of keypad areas 220. The first adhesive layer 300 is provided with a second hollow area 310. A photosensor FPC 320 is arranged on the second hollow area 310. The photosensor FPC 320 is provided with a first light-transmitting hole 321. The membrane keypad 400 is provided with a third hollow area 410. A photosensor IC 420 is arranged on the third hollow area 410. The sensing surface of the photosensor IC 420 is arranged opposite to the first light-transmitting hole 321 and the first hollow area 210. The photosensor FPC 320 is respectively connected to the membrane keypad 400 and the photosensor IC 420.

[0023] It should be noted that the first adhesive layer 300 and the membrane keypad 400 are set to be colorless and transparent. The light passes through the membrane keypad 400 layer, the first adhesive layer 300 and the keypad area 220 in sequence, so that the keypad pattern on the keypad area 220 has a light-emitting effect. The second hollow area 310 is opened on the first adhesive layer 300 to facilitate the installation of the photosensor FPC 320. The third hollow area 410 is opened on the membrane keypad 400 to facilitate the installation of the photosensor IC 420. By arranging the sensing surface of the photosensor IC 420 opposite to the first light-transmitting hole 321 and the first hollow area 210, the photosensor IC 420 can sense the ambient light intensity. Then, by connecting the photosensor FPC 320 to the membrane keypad 400 and the photosensor IC 420 respectively, the membrane keypad 400 panel 10 can adjust the brightness of the keypad according to the ambient light intensity, so that the user can clearly see the keypad pattern on the membrane keypad 400 panel 10 in a relatively dark ambient light environment.

[0024] Please refer to again Figure 1, In one embodiment, a diffusion film 500 is further included. The diffusion film 500 is disposed on the side of the key film 400 away from the first adhesive layer 300. The diffusion film 500 is mainly used for diffusing the light of the lamp, making the key patterns on the key area 220 clearer.

[0025] Please refer to again Figure 1 , In one embodiment, a second adhesive layer 600 is provided between the diffusion film 500 and the key film 400. The second adhesive layer 600 can connect the diffusion film 500 and the key film 400. A fourth hollow area 610 is formed on the second adhesive layer 600. The fourth hollow area 610 is disposed opposite to the key area 220. Thus, the light of the lamp can be prevented from being blocked by the second adhesive layer 600.

[0026] Please refer to again Figure 1 , In one embodiment, the second adhesive layer 600 is a black double-sided adhesive layer, which can prevent the light of the lamp from leaking and improve the display effect of the key patterns on the key area 220.

[0027] Please refer to again Figure 1 , In one embodiment, a semi-transparent ink layer 700 is provided on the side of the first hollow area 210 and the key area 220 away from the glass cover plate 100. With this setting, the first hollow area 210 and the key area 220 have a hidden effect, improving the aesthetics of the panel 10 of the key film 400.

[0028] Please refer to again Figure 1 , In one embodiment, the light-shielding ink layer 200 is a black ink, and the black ink has excellent light-shielding effect, making the keys on the key area 220 more clearly visible.

[0029] Please refer to again Figure 1 , In one embodiment, a PI reinforcement plate 311 is provided on the second hollow area 310. When the photosensitive IC 420 is welded to the photosensitive FPC 320, the PI reinforcement plate 311 provides a stable and relatively hard base surface, preventing the photosensitive FPC 320 from deforming due to the high-temperature welding process, thereby improving the welding quality.

[0030] Please refer to again Figure 1 , In one embodiment, a second light-transmitting hole 312 is formed on the PI reinforcement plate 311. The second light-transmitting hole 312 is aligned with the first light-transmitting hole 321. With this setting, the photosensitive surface of the photosensitive IC 420 can be prevented from being blocked by the PI reinforcement.

[0031] Please refer to again Figure 2 , In one embodiment, an insertion interface 430 is provided on the key film 400. The photosensitive FPC 320 is electrically connected to the key film 400 and the photosensitive IC 420 respectively. Thus, the photosensitive IC 420 can be connected to the main board circuit through the insertion interface 430.

[0032] Please refer to again Figure 2 Figure 2 In one embodiment, a PI reinforcing sheet 440 is provided on the key film 400. The PI reinforcing sheet 440 is disposed on one side of the insertion interface 430, so that the position of the insertion interface 430 is reinforced, avoiding the insecure connection between the photosensitive FPC 320 at this position and other components.

[0033] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation to the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the utility model patent shall be subject to the appended claims.

Claims

1. A key membrane panel structure, characterized in that, Including: A glass cover plate, a light-shielding ink layer, a first adhesive layer and a key film are sequentially arranged. The light-shielding ink layer is provided with a first hollow area and a plurality of key areas. The first adhesive layer is provided with a second hollow area. A light-sensing FPC is arranged on the second hollow area. The light-sensing FPC is provided with a first light-transmitting hole. The key film is provided with a third hollow area. A light-sensing IC is arranged on the third hollow area. The sensing surface of the light-sensing IC is arranged opposite to the first light-transmitting hole and the first hollow area. The light-sensing FPC is respectively connected to the key film and the light-sensing IC.

2. The structure of a button membrane panel according to claim 1, characterized in that, It further includes a diffusion film, and the diffusion film is arranged on the side of the key film away from the first adhesive layer.

3. The structure of a key membrane panel according to claim 2, characterized in that, A second adhesive layer is arranged between the diffusion film and the key film. The second adhesive layer is provided with a fourth hollow area, and the fourth hollow area is arranged opposite to the key area.

4. A key membrane panel structure according to claim 3, characterized in that, The second adhesive layer is a black double-sided adhesive layer.

5. A key membrane panel structure according to claim 1, characterized in that, A semi-transparent ink layer is arranged on the side of the first hollow area and the key area away from the glass cover plate.

6. A key membrane panel structure according to claim 1, characterized in that, The light-shielding ink layer is a black ink.

7. A key membrane panel structure according to claim 1, characterized in that, A PI reinforcement plate is arranged on the second hollow area.

8. A key membrane panel structure according to claim 7, characterized in that, The PI reinforcement plate is provided with a second light-transmitting hole, and the second light-transmitting hole is arranged in alignment with the first light-transmitting hole.

9. A key membrane panel structure according to claim 1, characterized in that An insertion interface is arranged on the key film.

10. A key membrane panel structure according to claim 9, characterized in that, A PI reinforcement piece is arranged on the key film, and the PI reinforcement piece is arranged on one side of the insertion interface.

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