Printed capacitive touch light-emitting panel

Abstract

The utility model relates to the technical field of light-emitting panels, in particular to a printed capacitive touch light-emitting panel which comprises a cold light sheet, a touch control device and a light driver. The cold light sheet comprises a base material, and the base material is provided with a transparent protection layer, an upper electrode layer, a light-emitting layer, a dielectric layer and a lower electrode layer. The lower electrode layer is provided with a first conductor, the optical driver is provided with a first output end and a second output end, and the upper electrode layer is provided with a second conductor and a third conductor. The first electric conductor is electrically connected with the first output end, the second electric conductor is electrically connected with the second output end, and the third electric conductor is electrically connected with the input end of the touch control device, so that the upper electrode layer serves as a transparent conducting layer of the cold light sheet and also serves as a touch disc of the touch film, an existing backlight plate is replaced, and the touch control device is simple in structure and convenient to use. And a touch film is replaced, so that the integrity of the touch light-emitting panel is improved, and the assembly process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of light-emitting panels, in particular to a printed capacitive touch light-emitting panel. Background Art

[0002] At present, in the fields of household appliances or automobiles on the market, in order to achieve the aesthetic and identification effects of the button areas of the touch panel, different patterns or colors are usually printed on the touch panel, a transparent touch film is pasted under the panel, and a scheme with an LED backlight is added to realize the lighting of the button areas of the touch panel.

[0003] Since the LED backlight uses a light guide plate to realize the diffusion of light, the lighting of the button areas of the touch panel is uneven, affecting the lighting effect of the button areas of the touch panel.

[0004] Electroluminescent technology, abbreviated as EL. It is a physical phenomenon in which an electric field is generated by applying a voltage across two electrodes, and the electrons excited by the electric field collide with the light-emitting center, resulting in the transition, change, and recombination of electrons between energy levels, leading to light emission.

[0005] There are also people in the market who use electroluminescent panels and apply them to touch panels, and a scheme of combining electroluminescent panels with conventional transparent touch films to realize the functions of lighting and touch, but it still increases the complexity of the assembly of the touch panel, so improvement is needed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a printed capacitive touch light-emitting panel for the deficiencies of the existing technology. By electrically connecting the first conductor to the first output end, the second conductor to the second output end, and the third conductor to the input end of the touch control device, the upper electrode layer serves both as the transparent conductive layer of the electroluminescent sheet and as the touch pad of the touch film, realizing that the electroluminescent sheet not only replaces the existing backlight board but also replaces the touch film, improving the integrity of the touch light-emitting panel and reducing the assembly process.

[0007] To achieve the above purpose, a printed capacitive touch light-emitting panel of the utility model includes an electroluminescent sheet, a touch control device, and a light driver for controlling the voltage frequency of the electroluminescent sheet. The touch control device is electrically connected to the electroluminescent sheet through the light driver;

[0008] The electroluminescent sheet includes a substrate, and a transparent protective layer, an upper electrode layer, a light-emitting layer, a dielectric layer, and a lower electrode layer are sequentially arranged from top to bottom on the substrate;

[0009] The lower electrode layer is provided with a first conductor, the light driver is provided with a first output end and a second output end, and the upper electrode layer is provided with a second conductor and a third conductor;

[0010] The first conductor is electrically connected to the first output end;

[0011] The second conductor is electrically connected to the second output end;

[0012] The third conductor is electrically connected to the input end of the touch control device.

[0013] Preferably, a touch chip is provided at the input end of the touch control device, and the input end of the touch chip is electrically connected to the third conductor.

[0014] Preferably, the light driver includes an EL driving module, a power supply module, a first contact, and a second contact.

[0015] Both the EL driving module and the power supply module are electrically connected to the touch control device.

[0016] The power supply module is used to connect to an external power supply;

[0017] The EL driving module is used to convert the input voltage into a high-frequency alternating voltage to drive the electroluminescent sheet to emit light;

[0018] Both the first contact and the second contact are used to control the output or input of the light driver.

[0019] Preferably, dimming powder particles are further provided in the light-emitting layer.

[0020] Preferably, it further includes a housing, the housing is provided with a pattern layer, the pattern layer is provided with a light-transmitting area and an opaque area, the opaque area shields the electroluminescent sheet, and the electroluminescent sheet emits light outward through the light-transmitting area.

[0021] Advantages of the present utility model: The touch control device of the present utility model is electrically connected to the electroluminescent sheet through the light driver, so that the electroluminescent sheet operates within a preset voltage and a preset operating frequency, making the touch light-emitting panel emit light evenly;

[0022] The first conductor is electrically connected to the first output end, the second conductor is electrically connected to the second output end, and the third conductor is electrically connected to the input end of the touch control device, so that the upper electrode layer serves as both the transparent conductive layer of the electroluminescent sheet and the touch pad of the touch film, realizing that the electroluminescent sheet not only replaces the existing backlight panel but also replaces the touch film, improving the integration of the touch light-emitting panel and reducing the assembly process. Description of the Drawings

[0023] Figure 1 It is a schematic diagram of the principle structure of the present utility model.

[0024] Figure 2Schematic diagram of the layered structure of the electroluminescent sheet of the present utility model.

[0025] Reference numerals include:

[0026] 1. Electroluminescent sheet; 11. Substrate; 12. Transparent protective layer; 13. Upper electrode layer; 14. Light-emitting layer; 15. Dielectric layer; 16. Lower electrode layer; 2. Touch control device; 3. Light driver; 31. EL driving module; 32. Power supply module; 4. Outer shell; 41. Pattern layer. Detailed implementation manners

[0027] The present utility model will be described in detail below with reference to the accompanying drawings.

[0028] As Figures 1 to 2 shown, a printed capacitive touch light-emitting panel of the present utility model includes an electroluminescent sheet 1, a touch control device 2, and a light driver 3 for controlling the voltage frequency of the electroluminescent sheet 1.

[0029] In use, the touch control device 2 is electrically connected to the electroluminescent sheet 1 through the light driver 3, so that the electroluminescent sheet 1 operates within a preset voltage and a preset operating frequency, making the touch light-emitting panel emit light evenly.

[0030] The operating voltage of the electroluminescent sheet 1 can be from AC40V to AC220V, and the operating frequency is between 50 Hz and 4000 Hz. Increasing both the voltage and the frequency can increase the brightness. In this embodiment, the operating voltage is AC50V and the operating frequency is 1200 Hz as an example.

[0031] The electroluminescent sheet 1 of the present application includes a substrate 11, and the substrate 11 is sequentially provided with a transparent protective layer 12, an upper electrode layer 13, a light-emitting layer 14, a dielectric layer 15, and a lower electrode layer 16 from top to bottom.

[0032] Each layer of the electroluminescent sheet 1 is processed and formed by screen printing. Specifically, the material of the lower electrode layer 16 is conductive silver paste. The material of the dielectric layer 15 is a mixed slurry of barium titanate and epoxy resin glue. The light-emitting layer 14 is formed by a mixed slurry of luminescent powder and epoxy resin glue, and the luminescent powder is zinc sulfide. The material of the upper electrode layer 13 is an aqueous solution of a high molecular polymer, which is composed of two substances, PEDOT (poly-3,4-ethylenedioxythiophene) and PSS (polystyrene sulfonate). The transparent protective layer 12 is composed of photo-immobilized varnish or thermosetting varnish.

[0033] The lower electrode layer 16 is provided with a first conductor, and the first conductor can be a conductive pin or a conductive wire. The light driver 3 is provided with a first output end and a second output end. The upper electrode layer 13 is provided with a second conductor and a third conductor, and both the second conductor and the third conductor can be conductive pins or conductive wires.

[0034] During use, the first conductor is electrically connected to the first output end, the second conductor is electrically connected to the second output end, and the third conductor is electrically connected to the input end of the touch control device 2, so that the upper electrode layer 13 serves as both the transparent conductive layer of the electroluminescent sheet 1 and the touch pad of the touch film, realizing that the electroluminescent sheet 1 not only replaces the existing backlight panel but also replaces the touch film, improving the integration of the touch light-emitting panel and reducing the assembly process.

[0035] The input end of the touch control device 2 in this embodiment is provided with a touch chip, and the touch chip is a conventional chip. The input end of the touch chip is electrically connected to the third conductor, and the touch instruction of the user is received through the touch chip.

[0036] The light driver 3 in this embodiment includes an EL driving module 31, a power supply module 32, a first contact, and a second contact.

[0037] Both the EL driving module 31 and the power supply module 32 are electrically connected to the touch control device 2, facilitating the touch control device 2 to control the EL driving module 31 and the power supply module 32, and realizing the electrical connection between the touch control device 2 and the light driver 3.

[0038] The power supply module 32 is used to connect to an external power supply, enabling the light driver 3 to connect to the external power supply.

[0039] The EL driving module 31 is used to convert the input voltage into a high-frequency alternating voltage to drive the electroluminescent sheet 1 to emit light.

[0040] In actual use, the EL driving module 31 usually includes an oscillator, a boost circuit, and an H-bridge driving circuit. The oscillator, the boost circuit, and the H-bridge driving circuit work together to convert the input voltage into a high-frequency alternating voltage to drive the electroluminescent sheet 1 to emit light.

[0041] Both the first contact and the second contact are used to control the output or input of the light driver 3, realizing the control of the light driver 3.

[0042] In this embodiment, the light-emitting layer 14 is further provided with dimming powder particles, and the dimming powder particles can be one or more of fluorescent powder, thermosensitive powder, and photosensitive powder, enabling the color of the light emitted by the light-emitting layer 14 to be adjusted.

[0043] In actual use, the mass ratio of the luminescent powder to the dimming powder is 99:0.8 - 1.2. This embodiment takes 99:0.9 as an example to make the light-emitting layer 14 emit white light.

[0044] This embodiment further includes a housing 4 for protecting the electroluminescent sheet 1. The housing 4 is provided with a pattern layer 41, and the pattern layer 41 is provided with a light-transmitting area and a light-blocking area. The light-blocking area shields the electroluminescent sheet 1, and the electroluminescent sheet 1 emits light outward through the light-transmitting area, causing a specific area of the housing 4 to emit light.

[0045] The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. The content of this specification should not be construed as a limitation to the present invention.

Claims

1. A printed capacitive touch luminous panel, characterized in that: It comprises a cold light sheet (1), a touch control device (2) and an optical driver (3) for controlling the voltage frequency of the cold light sheet (1), wherein the touch control device (2) is electrically connected to the cold light sheet (1) via the optical driver (3); The cold light sheet (1) comprises a substrate (11), wherein the substrate (11) is provided with a transparent protective layer (12), an upper electrode layer (13), a light-emitting layer (14), a dielectric layer (15) and a lower electrode layer (16) in order from top to bottom; The lower electrode layer (16) is provided with a first conductor, the optical driver (3) is provided with a first delivery output end and a second delivery output end, and the upper electrode layer (13) is provided with a second conductor and a third conductor; The first conductor is electrically connected to the first delivery output end; The second conductor is electrically connected to the second delivery output end; The third conductor is electrically connected to the input end of the touch control device (2).

2. A printed capacitive touch light-emitting panel according to claim 1, characterized in that: The input end of the touch control device (2) is provided with a touch chip, and the input end of the touch chip is electrically connected to the third conductor.

3. A printed capacitive touch light-emitting panel according to claim 1 or 2, characterized in that: The optical driver (3) comprises an EL driving module (31), a power supply module (32), a first contact and a second contact. The EL driving module (31) and the power supply module (32) are both electrically connected to the touch control device (2). The power supply module (32) is used to connect to an external power source; The EL driving module (31) is used to convert the input voltage into a high-frequency alternating voltage to drive the cold light sheet (1) to emit light; The first contact and the second contact are both used to control the output or input of the optical driver (3).

4. A printed capacitive touch light-emitting panel according to claim 1 or 2, characterized in that: The light-emitting layer (14) is also provided with dimming powder particles.

5. The printed capacitive touch light-emitting panel according to claim 1, characterized in that: It also comprises a shell (4), the shell (4) being provided with a pattern layer (41), the pattern layer (41) being provided with a light-transmitting area and a light-impermeable area, the light-impermeable area shielding the cold light sheet (1), and the cold light sheet (1) emitting light outwards through the light-transmitting area.

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