Touch button panel structure with light

Abstract

The utility model relates to the field of key panel structures, and particularly discloses a touch key panel structure with light, which comprises an FPC (Flexible Printed Circuit) flexible circuit board; the display assembly is stacked on the FPC flexible circuit board; the light guide plate is embedded between the FPC flexible circuit board and the display assembly; the light-emitting direction of the light-emitting assembly right faces any side wall of the light guide plate, and light emitted by the light-emitting assembly is guided into the light inlet of the display assembly through the light guide plate. According to the mode, the FPC flexible circuit board does not need to be slotted, the light source can correctly enter the display assembly only by laterally entering the light source and guiding the light source, and the FPC flexible circuit board is prevented from being slotted, so that a touch circuit is arranged at the corresponding position of the FPC flexible circuit board, and a product can be made to be finer.

Description

Technical Field

[0001] The utility model relates to the field of key panel structures, in particular to a touch key panel structure with light. Background Art

[0002] For many existing electronic devices, buttons are an effective solution for fast input. Existing buttons generally include physical buttons and touch buttons. Since physical buttons are prone to mechanical failures such as falling off and loosening, the application scope of touch buttons is becoming wider and wider, and the operation experience of touch buttons is better, and they are more popular with users. However, in order to solve the problem of being able to prompt the position of buttons for use in dark environments, existing touch buttons generally need to be configured with a light-emitting layer, or directly set on a display module that can emit light. Currently, more and more light-emitting button touch panels are used in the market.

[0003] At present, the design of the light-transmitting FPC of the key needs to hollow out the FPC key position. For example, the utility model patent document with application number CN201922172205.9 and the name of a key-type light-guiding panel structure in an airborne device discloses a key-type light-guiding panel structure in an airborne device, including a light-guiding panel on which a panel through hole and a panel blind hole opening downward are formed; a key assembly having a key body, a light-shielding cover tube and a light-transmitting cover plate; a PCB printed circuit board, which is placed below the light-guiding panel, and the PCB printed circuit board has a backlight LED; and an FPC flexible circuit board, which has a main body and an extension part, the main body is placed inside the lower section of the through hole, the main body has a key LED and the key LED is placed inside the upper section of the through hole. The beneficial effects of this patent document are: 1. The design of the light-shielding cover tube ensures that the key LED and the backlight LED do not crosstalk with each other; 2. The light-shielding cover tube is made of non-metallic material, which can effectively prevent the influence of static electricity on the electronic components of the product. The FPC flexible circuit board through which it passes has a main body and an extension part, and the main body is provided with a key LED, that is, the FPC flexible circuit board is grooved, and then the key LED is fixedly embedded therein.

[0004] In order to meet the needs of consumers, this application proposes a touch button panel structure with light, and this application realizes the function of FPC being light-transmissive without hollowing out, so that the product can be made fine and enhance the competitiveness of the enterprise. Utility Model Content

[0005] Based on this, it is necessary to provide a touch button panel structure with light to address the above technical problems.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A touch key panel structure with light, comprising:

[0008] FPC flexible circuit board;

[0009] A display component stacked on the FPC flexible circuit board;

[0010] A light guide plate embedded between the FPC flexible circuit board and the display component;

[0011] And a light emitting component whose light emitting direction faces the side wall of any one side of the light guide plate, so as to guide the light emitted by the light guide plate into the light inlet of the display component.

[0012] Furthermore, the display assembly includes a diffusion film, a semi-transparent color layer, a light-shielding color layer and a transparent substrate which are sequentially stacked along the light-entering direction thereof;

[0013] The light-shielding color layer is fixedly attached to the transparent substrate, and a hollow structure in the shape of a key is provided on the light-shielding color layer;

[0014] The light-shielding color layer is fixedly attached to the diffusion film through a double-sided adhesive layer, and the semi-transparent color layer presents a key shape corresponding to the hollow structure.

[0015] Furthermore, the transparent substrate is a colorless transparent tempered glass plate.

[0016] Furthermore, the light-shielding color layer is a black ink layer;

[0017] The semi-transparent color layer is a semi-transparent black ink layer.

[0018] Furthermore, the light emitting component includes a diode and an LED lamp fixedly arranged on the FPC flexible circuit board.

[0019] Furthermore, the hollow structure of the FPC flexible circuit board corresponding to the key shape is provided with a touch circuit.

[0020] Furthermore, an extension portion is provided on one side of the FPC flexible circuit board, and the extension portion is sequentially provided with a touch IC and component area, a PI reinforcement and an FPC socket.

[0021] Furthermore, the diffusion film is fixedly attached to the light guide plate by a second double-sided adhesive layer;

[0022] The light guide plate is fixedly attached to the FPC flexible circuit board through a double-sided adhesive layer.

[0023] Furthermore, the double-sided adhesive layer 2 and the double-sided adhesive layer 1 are both provided with grooves corresponding to the hollow structure.

[0024] Furthermore, the light guide plate is at least one of an optical acrylic plate, PC, PVC, glass, transparent resin and transparent wood.

[0025] The second double-sided adhesive layer and the first double-sided adhesive layer are both provided with grooves corresponding to the hollow structure.

[0026] Furthermore, the light guide plate is at least one of an optical acrylic plate, PC, PVC, glass, transparent resin and transparent wood.

[0027] Compared with the prior art, the utility model has the following beneficial effects:

[0028] The present application arranges a light-emitting component on the side of a light guide plate, and then limits the light emission direction of the light-emitting component so that the light enters from the side of the light guide plate, and then guides the light inside the light guide plate so that part of the light source of the light guide plate enters the display component along the target path. This method does not require grooving of the FPC flexible circuit board. It only requires the light source to enter from the side and guide it, so that the light source can enter the display component correctly, avoiding grooving of the FPC flexible circuit board, so that a touch circuit can be arranged at the corresponding position of the FPC flexible circuit board, so that the product can be made more sophisticated. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure explosion of the touch key panel with light provided by the utility model;

[0030] Figure 2 This is a side view of the structure of the touch-control key panel with light provided by the utility model;

[0031] Figure 3 This is a front view of the FPC flexible circuit board provided by the utility model.

[0032] The markings in the figure are as follows:

[0033] 1. FPC flexible circuit board; 2. Display component; 3. Light guide plate; 4. Light-emitting component; 5. Diffusion film; 6. Semi-transparent color layer; 7. Shading color layer; 8. Transparent substrate; 9. Diode; 10. LED lamp; 11. Touch circuit; 12. Touch IC and component area; 13. PI reinforcement; 14. FPC socket; 15. Double-sided adhesive layer one; 16. Double-sided adhesive layer two; 17. Double-sided adhesive layer three. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0035] As described in the background art, the FPC flexible circuit board in the prior art needs to place LEDs, which is not conducive to the refinement of products.

[0036] In order to solve this technical problem, the present application provides a touch key panel structure with light, including:

[0037] FPC flexible circuit board 1, Flexible Printed Circuit (FPC for short) is a highly reliable and excellently flexible printed circuit board made of polyimide or polyester film as the substrate. It has the characteristics of high wiring density, light weight, thin thickness and good bending performance. In this application, the specific material and specific specifications of the FPC flexible circuit board 1 are not limited, and the common FPC flexible circuit board 1 on the market can be used;

[0038] The display component 2 stacked on the FPC flexible circuit board 1 is a display screen used to display various information such as text, graphics, images, animations, market conditions, videos, and video signals. In this application, the specific shape of the display component 2 is not limited, and the display component 2 only needs to have a number of semi-transparent cases;

[0039] The light guide plate 3 embedded between the FPC flexible circuit board 1 and the display component 2 is made of optical-grade acrylic / PC sheet, and then a high-tech material with an extremely high refractive index and no light absorption is used to print light guide points on the bottom surface of the optical-grade acrylic sheet by laser engraving, V-shaped cross grid engraving, and UV screen printing technology. The optical-grade acrylic sheet is used to absorb the light emitted from the lamp and stay on the surface of the optical-grade acrylic sheet. When the light hits each light guide point, the reflected light will diffuse to various angles, and then destroy the reflection condition and be emitted from the front of the light guide plate. Through various light guide points of different densities and sizes, the light guide plate can emit light evenly. In this application, there is no restriction on the specific material of the light guide plate 3, as long as it has a light-guiding function;

[0040] And a light-emitting component 4 whose light-emitting direction is facing the side wall of any side of the light guide plate 3, so as to guide the light it emits into the light inlet of the display component 2 through the light guide plate 3. In the present application, the specific structure of the light-emitting component 4 is not limited, and it only needs to have the light-emitting function.

[0041] The core idea of ​​this utility model is:

[0042] The present application arranges a light-emitting component 4 on the side of the light guide plate 3, and then limits the light emission direction of the light-emitting component 4 so that the light enters from the side of the light guide plate 3, and then guides the light in the light guide plate 3 so that part of the light source of the light guide plate 3 enters the display component 2 along the target path. This method does not require grooving of the FPC flexible circuit board. It only needs to guide the light source from the side to enable the light source to correctly enter the display component 2, avoiding grooving of the FPC flexible circuit board 1, so that the touch circuit 11 can be arranged at the corresponding position of the FPC flexible circuit board 1, so that the product can be made more refined.

[0043] Preferably, the display assembly 2 comprises a diffusion film 5, a semi-transparent color layer 6, a light-shielding color layer 7 and a transparent substrate 8 which are sequentially stacked along the light-entering direction thereof.

[0044] The diffusion film 5 mainly refers to the diffusion layer with PET as the base material. When light passes through the medium with different refractive index, it will pass through many refractions, reflections and scattering phenomena, which can correct the light into a uniform surface light source to achieve the effect of optical diffusion.

[0045] The light-shielding color layer 7 is fixedly attached to the transparent substrate 8, and a hollow structure in the shape of a key is opened on the light-shielding color layer 7; the light-shielding color layer 7 is fixedly attached to the diffusion film 5 through a double-sided adhesive layer 15 to clamp the semi-transparent color layer 6 therebetween, and the semi-transparent color layer 6 presents a key shape corresponding to the hollow structure.

[0046] Preferably, the transparent substrate 8 is a colorless transparent tempered glass plate. Tempered glass panels are widely used in various electronic products, such as mobile phones, tablet computers, televisions, etc. These products need to have the characteristics of high strength, high hardness, high transparency and good touch, and tempered glass panels just have these characteristics. Moreover, after special treatment, tempered glass can also have anti-fingerprint, anti-glare and other functions.

[0047] Preferably, the light-shielding color layer 7 is a black ink layer; the semi-transparent color layer 6 is a semi-transparent black ink layer. In fact, both the black ink layer and the semi-transparent black ink layer are formed by printing on a transparent substrate 8. Furthermore, silk screen printing, i.e., screen printing, can be used. It refers to using a silk screen as a base, and through a photosensitive plate-making method, the mesh holes of the silk screen printing plate are transparent to the ink, and the mesh holes of the non-graphic part are not transparent to the ink. The basic principle is used for printing to make a silk screen printing plate with graphics. The black ink layer and the semi-transparent black ink layer are actually negligible in thickness and are attached to the transparent substrate 8, so they do not need to be specially fixed. In the figure, the black ink layer and the semi-transparent black ink layer are thicker for ease of reading and understanding, and the actual thickness is negligible.

[0048] Preferably, the light emitting assembly 4 includes a diode 9 and an LED lamp 10 fixedly arranged on the FPC flexible circuit board 1. The specific type of the LED lamp is not limited in this application, and it only needs to have a light emitting function, and after being lit, the light is directed toward the light guide plate 3. The diode 9 is optional, which is related to the combination of the selected LED lamp, and those skilled in the art can rotate it according to the situation.

[0049] Preferably, the hollow structure of the FPC flexible circuit board 1 corresponding to the key shape is provided with a touch circuit 11. In the present application, due to the side light entry and light guiding effect of the light guide plate 3, the key area on the FPC flexible circuit board 1 facing the upper transparent substrate 8 does not need to be grooved, so that this part of the space is reserved, so that this part of the space can be directly used to set the touch circuit 11, and the operator can directly act on the touch circuit 11 through the key to form the key control, thereby improving the integration of the product.

[0050] Generally, the FPC flexible circuit board 1 also has the following prior art: an extension portion is provided on one side of the FPC flexible circuit board 1, and the extension portion is sequentially provided with a touch IC and component area 12, a PI reinforcement 13 and an FPC socket 14. This part belongs to the prior art and will not be described in detail.

[0051] The diffusion film 5 is fixedly attached to the light guide plate 3 via a second double-sided adhesive layer 16 ; the light guide plate 3 is fixedly attached to the FPC flexible circuit board 1 via a third double-sided adhesive layer 17 .

[0052] The double-sided adhesive layer 15, the double-sided adhesive layer 2 16 and the double-sided adhesive layer 3 17 may be a layered structure formed by solidifying adhesive, or may be directly pasted with double-sided adhesive tape, as long as the two can be fixed.

[0053] Preferably, the double-sided adhesive layer 2 16 and the double-sided adhesive layer 1 15 are both provided with grooves corresponding to the hollow structure.

[0054] Generally, the light guide plate 3 is at least one of optical acrylic plate, PC, PVC, glass, transparent resin and transparent wood.

[0055] The best embodiment of this application:

[0056] like Figures 1 to 3 As shown, the structure of the touch key panel with light comprises: an FPC flexible circuit board 1; a display component 2 stacked on the FPC flexible circuit board 1; a light guide plate 3 embedded between the FPC flexible circuit board 1 and the display component 2; and a light emitting component 4 whose light emitting direction faces the side wall of any side of the light guide plate 3, so as to guide the light emitted by it into the light inlet of the display component 2 through the light guide plate 3. The display component 2 comprises a diffusion film 5, a semi-transparent color layer 6, a light-shielding color layer 7 and a transparent substrate 8 (made of a colorless transparent tempered glass plate) stacked in sequence along its light inlet direction; the light-shielding color layer 7 is fixedly attached to the transparent substrate 8, and a hollow structure presenting a key shape is opened on the light-shielding color layer 7; the light-shielding color layer 7 is fixedly attached to the diffusion film 5 through a double-sided adhesive layer 15, and the semi-transparent color layer 6 presents a key shape corresponding to the hollow structure. The light-shielding color layer 7 is a black ink layer printed on the transparent substrate 8 by silk screen printing; the semi-transparent color layer 6 is a semi-transparent black ink layer printed on the hollow position of the black ink layer on the transparent substrate 8 by silk screen printing. The light-emitting component 4 includes a diode 9 and an LED lamp 10 fixedly arranged on the FPC flexible circuit board 1. The FPC flexible circuit board 1 is provided with a touch circuit 11 in a hollow structure corresponding to the key shape. An extension portion is provided on one side of the FPC flexible circuit board 1, and the extension portion is provided with a touch IC and component area 12, a PI reinforcement 13 and an FPC socket 14 in sequence. The diffusion film 5 is fixedly attached to the light guide plate 3 by a double-sided adhesive layer 2 16; the light guide plate 3 is fixedly attached to the FPC flexible circuit board 1 by a double-sided adhesive layer 3 17. The double-sided adhesive layer 2 16 and the double-sided adhesive layer 1 15 are both provided with grooves corresponding to the hollow structure. The light guide plate 3 is an optical acrylic plate.

[0057] The working principle of the best embodiment:

[0058] The LED lamp 10 emits light, and the light emitted just enters through the side of the light guide plate 3 made of acrylic material. Then, part of the light entering the light guide plate 3 is reflected and guided to be concentrated to the slot position on the double-sided adhesive layer 16 (i.e., the light inlet of the display component 2). After passing through the double-sided adhesive layer 16, the light passes through the diffusion film 5 and enters the slot of the double-sided adhesive layer 15 more evenly. The light entering the slot of the double-sided adhesive layer 15 just shines on the semi-transparent black ink layer, and then the human eye can see the semi-transparent black ink layer emitting light through the transparent substrate 8.

[0059] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0060] Obviously, the embodiments described above are only some embodiments of the utility model, rather than all embodiments. The preferred embodiments of the utility model are given in the accompanying drawings, but they do not limit the patent scope of the utility model. The utility model can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the utility model more thorough and comprehensive. Although the utility model has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to replace some of the technical features therein with equivalents. Any equivalent structure made using the contents of the utility model specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the utility model.

Claims

1. A touch key panel structure with light, comprising: FPC flexible circuit board (1); A display component (2) stacked on the FPC flexible circuit board (1); The invention is characterized in that a light guide plate (3) is embedded between the FPC flexible circuit board (1) and the display component (2); and a light emitting component (4) whose light emitting direction faces the side wall on any side of the light guide plate (3), so as to guide the light emitted by the light guide plate (3) into the light inlet of the display component (2).

2. The touch key panel structure with light according to claim 1, characterized in that: The display assembly (2) comprises a diffusion film (5), a semi-transparent color layer (6), a light-shielding color layer (7), and a transparent substrate (8) which are sequentially stacked along the light-entering direction thereof; The light-shielding color layer (7) is fixedly attached to the transparent substrate (8), and a hollow structure in the shape of a key is provided on the light-shielding color layer (7); The light-shielding color layer (7) is fixedly adhered to the diffusion film (5) via a double-sided adhesive layer (15), and the semi-transparent color layer (6) presents a key shape corresponding to the hollow structure.

3. The touch key panel structure with light according to claim 2, characterized in that: The transparent substrate (8) is a colorless transparent tempered glass plate.

4. The touch key panel structure with light according to claim 2, characterized in that: The light-shielding color layer (7) is a black ink layer; The semi-transparent color layer (6) is a semi-transparent black ink layer.

5. The touch key panel structure with light according to claim 1, characterized in that: The light-emitting component (4) comprises a diode (9) and an LED lamp (10) which are fixedly arranged on the FPC flexible circuit board (1).

6. The touch key panel structure with light according to claim 2, characterized in that: The FPC flexible circuit board (1) is provided with a touch circuit (11) in the hollow structure corresponding to the key shape.

7. The touch key panel structure with light according to claim 1, characterized in that: An extension portion is provided on one side of the FPC flexible circuit board (1), and the extension portion is provided with a touch IC and component area (12), a PI reinforcement (13), and an FPC socket (14) in sequence.

8. The touch key panel structure with light according to claim 2, characterized in that: The diffusion film (5) is fixedly attached to the light guide plate (3) via a second double-sided adhesive layer (16); The light guide plate (3) is fixedly attached to the FPC flexible circuit board (1) via a double-sided adhesive layer (17).

9. The touch key panel structure with light according to claim 8, characterized in that: The double-sided adhesive layer 2 (16) and the double-sided adhesive layer 1 (15) are both provided with grooves corresponding to the hollow structure.

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