Touch key device with backlight

Abstract

The utility model relates to a touch key device with backlight. The touch key device comprises a touch panel, a control circuit board, a light-emitting assembly and a filling layer. And the touch panel is provided with light-transmitting key symbols. The control circuit board is arranged on one side of the touch panel and used for recognizing touch signals on the touch panel. The light-emitting assembly is arranged on the control circuit board and protrudes out of the surface of the control circuit board. The filling layer is located on the side, provided with the light-emitting assembly, of the control circuit board and used for filling the height difference between the light-emitting assembly and the control circuit board. When the light-emitting component emits light, the light can be transmitted from the light-transmitting key symbols on the touch panel, so that a user can still identify characters in a dark environment. By arranging the filling layer, the height difference between the light-emitting assembly and the control circuit board can be filled and leveled up through the filling layer. Therefore, the touch signal of the touch panel can be transmitted to the control circuit board through the filling layer, the touch response is sensitive, and the use experience of the touch key device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of touch sensing, in particular to a touch key device with backlight. Background Art

[0002] Touch buttons are a component commonly used in electronic devices to implement input functions. Touch buttons usually include a touch glass plate and an FPC (Flexible Printed Circuit) disposed underneath it. The touch glass plate is used to generate a press signal when touched and pressed, and the FPC is used to identify the press signal, thereby implementing the corresponding key input function.

[0003] There is a touch key device on the market that sets a light group under the touch glass plate to realize backlight display of the touch keys so that users can see the positions of each key clearly in a dark environment. However, since the light group is set under the touch glass plate, the touch glass plate and the FPC cannot be in close contact, which makes the FPC insensitive to receiving and identifying the pressing signal, affecting the touch effect of the touch key device. Utility Model Content

[0004] One purpose of the utility model is to solve the deficiencies in the prior art and provide a touch key device with backlight that is easy to use and has sensitive touch response. To solve the above technical problems, the utility model adopts the following technical solutions:

[0005] A touch key device with backlight, comprising:

[0006] A touch panel having light-transmissive key symbols thereon;

[0007] A control circuit board is arranged on one side of the touch panel, and is used to identify a touch signal on the touch panel;

[0008] a light emitting component, which is disposed on the control circuit board and is located on a side of the control circuit board facing the touch panel, and the light emitting component protrudes from a surface of the control circuit board; and

[0009] The filling layer is located at a side of the control circuit board where the light-emitting component is provided, and is used to fill the height difference between the light-emitting component and the control circuit board.

[0010] In one embodiment, the light emitting component includes a plurality of LED light sources, the plurality of LED light sources are arranged at intervals on a control circuit board, and the filling layer is filled in the intervals between the LED light sources.

[0011] In one embodiment, a plurality of through holes are formed on the filling layer, and the plurality of through holes are arranged in one-to-one correspondence with the plurality of LED light sources.

[0012] In one embodiment, each LED light source is an RGB three-color lamp bead.

[0013] In one embodiment, the filling layer is a silicone material layer.

[0014] In one embodiment, the touch button device further includes a light guide layer, which is disposed between the light emitting component and the touch panel and is used to transmit light emitted by the light emitting component to the touch panel.

[0015] In one embodiment, the light guide layer is a light guide film.

[0016] In one of the embodiments, the touch panel includes a touch glass layer and a silk-screen layer that are stacked, the silk-screen layer is located on a side of the touch glass layer facing the light-emitting component, and the silk-screen layer includes an opaque area and a hollowed-out light-transmitting area corresponding to the key symbols.

[0017] In one embodiment, the hollow light-transmitting area includes a hollow key frame and hollow characters located in the key frame.

[0018] In one embodiment, the touch button device further includes a bottom shell, the touch panel is relatively fixedly connected to the bottom shell, and an installation space for installing a control circuit board can be formed between the touch panel and the bottom shell.

[0019] It can be seen from the above technical solution that the utility model has at least the following advantages and positive effects:

[0020] In the present invention, the touch panel is provided with light-transmissive key symbols. When the light-emitting component emits light, light will be transmitted from the light-transmissive key symbols on the touch panel, so that the user can still recognize characters and use the touch key device correctly in a dark environment. This effectively improves the problem of misoperation and improves the convenience of using the touch key device.

[0021] Since the light-emitting component protrudes from the surface of the control circuit board, there is a gap between the touch panel and the control circuit board. By setting a filling layer on the control circuit board, the filling layer can fill the height difference between the light-emitting component and the control circuit board. Therefore, the touch pressing signal of the touch panel can be transmitted to the control circuit board through the filling layer, making the touch response sensitive and the touch effect good, thereby improving the user experience of the touch key device. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a touch key device with backlight according to an embodiment.

[0023] Figure 2 yes Figure 1 The schematic diagram of the structural decomposition of the touch key device is shown.

[0024] Figure 3 yes Figure 1 The front schematic diagram of the internal structure of the touch key device is shown.

[0025] Figure 4 yes Figure 1 A cross-sectional schematic diagram of a touch key device is shown.

[0026] Figure 5 yes Figure 4 An enlarged schematic diagram of point A of the structure shown.

[0027] The following are the descriptions of the reference numerals:

[0028] 10- bottom shell; 20- control circuit board;

[0029] 30-light emitting component; 31-LED light source;

[0030] 40-filling layer; 41-through hole;

[0031] 50-light guide layer; 60-touch panel. DETAILED DESCRIPTION

[0032] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0033] In the description of the present application, it should be understood that in the embodiments shown in the drawings, the indications of directions or positional relationships (such as up, down, left, right, front and back, etc.) are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, the indications of these directions also change accordingly.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0035] The touch key device with backlight of the utility model can be a touch keyboard, a touch area of ​​an industrial display screen, a touch area of ​​a vehicle instrument panel, or a touch screen of a digital product, etc. The touch key device with backlight of the utility model can be designed into different key forms according to different usage scenarios to realize the function of touch keys. At the same time, the touch keys have a backlight effect, and the touch keys are sensitive to response, which greatly improves the user experience.

[0036] See also Figure 1 and Figure 2 As shown, the touch key device with backlight according to the embodiment of the utility model includes a touch panel 60 , a control circuit board 20 , a light emitting component 30 and a filling layer 40 .

[0037] The touch panel 60 is provided with light-transmissive key symbols. The control circuit board 20 is arranged on one side of the touch panel 60, and is used to identify the touch signal on the touch panel 60. In this embodiment, the touch key device can be a resistive touch key device. When the key symbol on the touch panel 60 is touched and pressed, the touch panel 60 will generate a touch pressing signal, so that the control circuit board 20 can recognize the touch pressing signal and complete the corresponding key action.

[0038] It is understandable that the touch key device of the present invention can also be a capacitive touch key device. When a human hand touches or approaches a key symbol on the touch panel 60, an inductive capacitance is generated on the touch panel 60, so that the control circuit board 20 can recognize the inductive capacitance signal and complete the corresponding key action.

[0039] like Figure 2 As shown, the light emitting component 30 is disposed on the control circuit board 20 and is located on the side of the control circuit board 20 facing the touch panel 60. When the light emitting component 30 emits light, the light will be transmitted from the light-transmissive key symbols on the touch panel 60, so that the user can still recognize the characters and use the touch key device correctly in a dark environment. This effectively improves the problem of misoperation and improves the convenience of using the touch key device.

[0040] The light emitting assembly 30 protrudes from the surface of the control circuit board 20 . The filling layer 40 is located on the side of the control circuit board 20 where the light emitting assembly 30 is provided, and is used to fill the height difference between the light emitting assembly 30 and the control circuit board 20 .

[0041] In this embodiment, the light emitting component 30 is arranged on the control circuit board 20. Since the light emitting component 30 has a certain height, there is a gap between the touch panel 60 and the control circuit board 20. By arranging the filling layer 40 on the control circuit board 20, the filling layer 40 can fill the height difference between the light emitting component 30 and the control circuit board 20. That is, the thickness of the filling layer 40 can be flush with the top of the light emitting component 30, so that the surface of the control circuit board 20 facing the touch panel 60 is a flat surface. Therefore, the touch pressing signal of the touch panel 60 can be transmitted to the control circuit board 20 through the filling layer 40, so that the touch response is sensitive, and the user experience of the touch key device is improved.

[0042] In the present application, the key symbols on the touch panel 60 may be the same as the characters printed on the keyboard (i.e., numbers, English letters, F1-F12, Enter, Shift, etc.), but not limited thereto, the key symbols on the touch panel 60 may also be other types of numbers, letters, mathematical symbols, etc., arranged and combined to achieve the corresponding touch key functions.

[0043] In one embodiment, the touch panel 60 includes a touch glass layer and a silk-screen layer stacked together. The silk-screen layer is located on the side of the touch glass layer facing the light-emitting component 30. The silk-screen layer includes an opaque area and a hollowed-out light-transmitting area corresponding to the key symbols.

[0044] The touch glass layer may be a transparent glass plate. Optionally, the touch glass layer may be a tempered glass plate to enhance the structural strength of the touch key device.

[0045] In this embodiment, the silk-screen layer may be an opaque black coating, which as a whole forms an opaque region. Hollow characters / graphics are engraved on the black coating of the silk-screen layer to form a hollow translucent region.

[0046] It can be understood that in this embodiment, the hollow light-transmitting area of ​​the silk-screen layer can be engraved into numbers, English letters, F1-F12, Enter, Shift and other characters corresponding to the key symbols mentioned above. When the light-emitting component 30 emits light, the light will pass through the hollow light-transmitting area, so that the touch panel 60 shows light-transmitting characters, and the display effect is better.

[0047] In one embodiment, the hollow light-transmitting area further includes an orderly arranged key frame. The key frame can be a hollow line frame, and the hollow characters are located in the key frame. Thus, the touch keys on the touch panel 60 are presented clearly and orderly, which is convenient for users to use.

[0048] See also Figure 2In one embodiment, the light emitting assembly 30 includes a plurality of LED light sources 31, and the plurality of LED light sources 31 are arranged at intervals on the control circuit board 20. The filling layer 40 may be filled in the intervals between the LED light sources 31.

[0049] The plurality of LED light sources 31 may be evenly arranged and distributed on the control circuit board 20 , thereby facilitating improving the backlight uniformity of the touch panel 60 .

[0050] In one embodiment, each LED light source 31 may be an RGB three-color lamp bead. Since each LED light source 31 is a three-color LED lamp bead, the three-color LED lamp bead can emit monochromatic light of different colors or mixed white light as needed. This improves the diversity and interest of the backlight color of the touch key device.

[0051] In one embodiment, a plurality of through holes 41 are formed on the filling layer 40, and the plurality of through holes 41 are arranged in a one-to-one correspondence with the plurality of LED light sources 31. The filling layer 40 may be a silica gel material layer.

[0052] For example, the filling layer 40 can be a whole piece of silicone pad. Figure 3 As shown, a through hole 41 is provided on the silicone pad at a position corresponding to each LED light source 31. Each LED light source 31 is located in the through hole 41, and the silicone pad covers the interval between each LED light source 31. The thickness of the silicone pad can be the same as the height of each LED light source 31.

[0053] In other embodiments, the filling layer 40 may also be an injection-molded silicone material layer. After each LED light source 31 is mounted on the control circuit board 20, the silicone material is filled in the intervals between the LED light sources 31 by injection molding, and the silicone material layer after injection molding is flush with the top of each LED light source 31.

[0054] It should be noted that, in other embodiments, the light emitting component 30 may also be an electroluminescent sheet, which is disposed on the control circuit board 20. When the electroluminescent sheet is installed at different positions on the control circuit board 20 according to design requirements, the surface of the control circuit board 20 becomes uneven. Therefore, by providing the filling layer 40, the depressions of the control circuit board 20 can be filled, so that the surface of the control circuit board 20 facing the touch panel 60 is a flat surface.

[0055] See also Figure 2 As shown, in one embodiment, the touch button device further includes a light guide layer 50 , which is disposed between the light emitting component 30 and the touch panel 60 , and is used to transmit light emitted by the light emitting component 30 to the touch panel 60 .

[0056] In this embodiment, the light emitted by each LED light source 31 can be uniformly transmitted to the touch panel 60 through the light guide layer 50, so that the light can evenly pass through the entire touch panel 60, thereby improving the backlight uniformity of the touch key device.

[0057] In the present application, the light guide layer 50 is a light guide film, but not limited thereto, the light guide layer 50 may also be a light guide plate, which is stacked on the light emitting component 30 and the filling layer 40 and is located below the touch panel 60 .

[0058] like Figure 2 As shown, in one embodiment, the touch key device further comprises a bottom shell 10, and the touch panel 60 is relatively fixedly connected to the bottom shell 10. For example, the bottom shell 10 has a bottom plate and a peripheral edge protruding upward along the periphery of the bottom plate. The peripheral edge of the touch panel 60 is fixed to the peripheral edge.

[0059] An installation space for installing the control circuit board 20 can be formed between the touch panel 60 and the bottom case 10 .

[0060] In this embodiment, see Figure 5 As shown, the control circuit board 20 is installed in the installation space between the touch panel 60 and the bottom shell 10, and the light-emitting component 30, the filling layer 40 and the light-guiding layer 50 are respectively arranged on the control circuit board 20 in sequence and located in the installation space, thereby ensuring the structural integrity of the touch button device.

[0061] The above embodiments are merely exemplary descriptions of the structures. The structures in the embodiments are not fixed combination structures. In the absence of structural conflicts, the structures in multiple embodiments can be used in any combination.

[0062] Although the utility model has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the utility model can be implemented in a variety of forms without departing from the spirit or essence of the utility model, it should be understood that the above-mentioned embodiments are not limited to any of the aforementioned details, but should be widely interpreted within the spirit and scope defined by the attached claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the attached claims.

Claims

1. A touch key device with backlight, characterized in that: include: A touch panel having light-transmissive key symbols thereon; A control circuit board, which is arranged on one side of the touch panel, and is used to identify a touch signal on the touch panel; A light emitting component is disposed on the control circuit board and is located on a side of the control circuit board facing the touch panel, and the light emitting component protrudes from a surface of the control circuit board; as well as A filling layer is located at a side of the control circuit board where the light emitting component is provided, and the filling layer is used to fill the height difference between the light emitting component and the control circuit board.

2. The touch key device with backlight according to claim 1, characterized in that: The light emitting component comprises a plurality of LED light sources, the plurality of LED light sources are arranged at intervals on the control circuit board, and the filling layer is filled in the intervals between the LED light sources.

3. The touch key device with backlight according to claim 2, characterized in that: The filling layer is provided with a plurality of through holes, and the plurality of through holes are arranged in one-to-one correspondence with the plurality of LED light sources.

4. The touch key device with backlight according to claim 2, characterized in that: Each of the LED light sources is an RGB three-color lamp bead.

5. The touch key device with backlight according to claim 1, characterized in that: The filling layer is a silica gel material layer.

6. The touch key device with backlight according to claim 1, characterized in that: It also includes a light guide layer, which is arranged between the light emitting component and the touch panel and is used to conduct the light emitted by the light emitting component to the touch panel.

7. The touch key device with backlight according to claim 6, characterized in that: The light-guiding layer is a light-guiding film.

8. The touch key device with backlight according to claim 1, characterized in that: The touch panel includes a touch glass layer and a silk-screen layer which are stacked, the silk-screen layer is located on a side of the touch glass layer facing the light-emitting component, and the silk-screen layer includes an opaque area and a hollowed-out light-transmitting area corresponding to the key symbol.

9. The touch key device with backlight according to claim 8, characterized in that: The hollow light-transmitting area includes a hollow key frame and hollow characters located in the key frame.

10. The touch key device with backlight according to claim 1, characterized in that: The device further comprises a bottom shell, the touch panel is relatively fixedly connected to the bottom shell, and an installation space for installing the control circuit board can be formed between the touch panel and the bottom shell.

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