Touch display panel anti-interference structure
By setting a first shielding grid in the shielding area and setting it around the touch button area, the problem of weak touch signals after the signal-to-noise ratio is increased in the prior art is solved, and the effect of improving the signal-to-noise ratio and signal stabilization is achieved.
Patent Information
- Application Number
- CN202421654094.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-12
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-07-12
AI Technical Summary
While the prior art increases the signal-to-noise ratio, the touch signal becomes too weak, affecting the display effect.
Set the first shielding grid in the shielding area, set it around the touch button area, and use copper in the form of a grid instead of fully laying copper or just drawing a circle of shielding lines around.
While improving the signal-to-noise ratio, the touch signal is avoided from becoming too weak, ensuring the stability and reliability of the display effect.
Smart Images
Figure CN222825891U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of display, in particular to an anti-interference structure of a touch display panel and a vehicle-mounted refrigerator. Background Art
[0002] The touch screen in the car display system is used to complete specific functions by touching the button area on the screen, such as increasing the volume, enhancing the central control backlight, etc.
[0003] According to the prior art, there is an ultra-thin touch screen structure, with publication number CN220752680U, comprising a transparent cover plate, a black ink layer is provided on the back of the transparent cover plate to enclose a visible area; a light-transmitting ink area is also provided on the back of the transparent cover plate to form a key area; a capacitive film layer is provided on the back of the black ink layer, and the structure of the capacitive film layer includes a carrier layer, a touch sensor and a glue layer, the touch sensor is made on the carrier layer, and the glue layer covers the touch sensor; the structure of the touch sensor includes a conductive polymer coating area, a shielding area, a carbon wire and a connecting wire, the shielding area is a ground wire, although the signal-to-noise ratio is improved, the touch signal will become very weak. Utility Model Content
[0004] The technical problem to be solved by the utility model is to overcome the defects of the above prior art and provide an anti-interference structure of a touch display panel which can improve the signal-to-noise ratio and prevent the touch signal from becoming weak.
[0005] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a touch display panel anti-interference structure, including a display panel and a touch film, the touch film including:
[0006] A mask body; the mask body comprises a diffusion film layer, on which a touch button area, a shielding area and a mask wiring are respectively provided; the shielding area comprises a first shielding grid, and the first shielding grid surrounds the touch button area; one end of the mask wiring is electrically connected to the touch button area, and the other end of the mask wiring is electrically connected to the display panel through the shielding area.
[0007] After adopting the above structure, the utility model has the following advantages compared with the prior art: a first shielding grid is set in the shielding area, and the first shielding grid is set around the touch button area. Compared with full copper plating or only drawing a circle of shielding wire around it, it can improve the signal-to-noise ratio while preventing the touch signal from becoming too weak.
[0008] Preferably, the mask body also includes a protective layer and a foam layer. The protective layer is arranged on the bottom surface of the diffusion membrane layer, and the foam layer is arranged on the bottom surface of the protective layer. The protective layer protects the diffusion membrane layer; the foam layer plays a supporting role, so that the diffusion membrane layer effectively contacts the entire machine casing assembly to ensure the touch effect.
[0009] Preferably, the mask body extends outward to form a wiring part, and a foam layer is also provided on the upper surface of the wiring part. The other end of the mask wiring passes through the wiring part and is electrically connected to the display panel. The foam layer on the wiring part mainly plays an isolation role to prevent the lines on the wiring part from directly contacting other components, thereby improving touch reliability.
[0010] Preferably, the display panel includes a top layer, an inner layer, an inner second layer and a bottom layer from top to bottom, and the bottom layer is provided with a touch socket, a chip, a touch wiring and a second shielding grid respectively, the touch film is electrically connected to the touch socket through the wiring part, the mask wiring is electrically connected to the chip through the touch socket and the touch wiring in turn, and the bottom layer also adopts a shielding grid instead of paving all copper. This can improve the signal-to-noise ratio while preventing the touch signal from becoming too weak.
[0011] Preferably, a contact surface is provided at the end of the wiring portion, and the contact surface is electrically connected to the touch socket to facilitate electrical connection between the touch film and the display panel.
[0012] Preferably, the inner two layers are provided with a large-area shielding grid and a partial full copper layer, and since the inner two layers are very close to the bottom layer, most of the copper is laid in a grid form to prevent the touch signal from being weakened. The partial full copper can improve the anti-interference effect.
[0013] Preferably, a full copper layer is provided on the inner layer. Since the inner layer is far away from the touch circuit of the bottom layer, a full copper layer is used to improve the anti-interference effect.
[0014] Preferably, a full copper layer is also provided on the top layer. Since the top layer is far away from the touch circuit of the bottom layer, a full copper layer is used to improve the anti-interference effect.
[0015] Preferably, the touch sockets are respectively arranged on the left and right sides of the display panel, and the touch films correspond to the touch sockets one by one. Two touch films are arranged to facilitate multiple button control. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 The utility model is a schematic diagram of a touch film with an anti-interference structure for a touch display panel.
[0017] Figure 2 It is a front sectional view of an anti-interference structure of a touch display panel of the utility model.
[0018] Figure 3 It is a schematic diagram of the bottom layer of the anti-interference structure of a touch display panel of the utility model.
[0019] Figure 4 It is a schematic diagram of the second layer of the anti-interference structure of a touch display panel of the utility model.
[0020] Figure 5 It is a schematic diagram of a layer in the anti-interference structure of a touch display panel of the utility model.
[0021] Figure 6 It is a schematic diagram of the top layer of the anti-interference structure of a touch display panel of the utility model.
[0022] Among them, 1. display panel, 110. top layer, 120. inner layer, 130. inner second layer, 140. bottom layer, 141. touch socket, 142. chip, 143. touch wiring, 144. second shielding grid, 2. touch film, 3. mask body, 310. diffusion film layer, 311. touch button area, 312. shielding area, 3121. first shielding grid, 313. mask wiring, 320. protective layer, 330. foam layer, 4. wiring part, 410. contact surface. DETAILED DESCRIPTION
[0023] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.
[0024] like Figure 1 As shown, the utility model provides an anti-interference structure of a touch display panel, including a display panel 1 and a touch film 2, the touch film 2 includes a mask body 3 and a wiring part 4, the mask body 3 includes a diffusion film layer 310, and the diffusion film layer 310 is respectively provided with a touch button area 311, a shielding area 312 and a mask wiring 313, the shielding area 312 includes a first shielding grid 3121, the first shielding grid 3121 is a copper plating in a grid form, and the first shielding grid 3121 is arranged around the touch button area 311, while improving the signal-to-noise ratio, preventing the touch signal from becoming too weak.
[0025] Specifically, the diffusion film layer 310 uses the diffusion film as a substrate, and prints high molecular transparent conductive polymer and silver paste on the diffusion film, which has a conductive effect. The high molecular transparent conductive polymer is used for the touch button area 311, and the silver paste is used for the mask wiring 313 and the shielding grid. The diffusion film is in a translucent state and plays a role in light transmission and light uniformity.
[0026] As an example, Figure 2A protective layer 320 is provided on the bottom surface of the diffusion film layer 310. The protective layer 320 is coated on the diffusion film layer 310 with insulating varnish. After the varnish is cured, it can isolate air and moisture to achieve a protective effect. A foam layer 330 is provided on the bottom surface of the protective layer 320. The foam layer 330 is glued. The foam layer 330 of the mask body 3 can play a supporting role, so that the diffusion film layer 310 can effectively contact the outer shell components of the entire machine to ensure the touch effect.
[0027] As an example, Figure 1 and 3 , it also includes a wiring part 4, which is arranged on one side of the mask body 1, one end of the mask wiring 313 is electrically connected to the touch button area 311, and the other end of the mask wiring 313 is electrically connected to the display panel 1 through the shielding area 312 and the wiring part 4 in sequence. The wiring part 4 also includes a diffusion film layer 310, a protective layer 320 and a foam layer 330. The protective layer 320 is also arranged on the bottom surface of the diffusion film layer 310, and the foam layer 330 is respectively arranged on the bottom surface of the protective layer 320 and the upper surface of the diffusion film layer 310. The foam layer 330 of the wiring part 4 mainly plays an isolation role to prevent the wiring line from directly contacting other components and improve the touch reliability. At the same time, a shielding grid is also provided on the diffusion film layer 310. Specifically, one end of the mask wiring 313 is electrically connected to the touch button area 311, and the other end of the mask wiring 312 is electrically connected to the display panel 1 through the shielding area 312 and the wiring part 4 in sequence. Specifically, the surface of the diffusion film layer 310 of the wiring part 4 away from one end of the mask body 3 is provided with a contact surface 410, and the wiring part 4 is electrically connected to the display panel 1 through the contact surface 410. Specifically, the contact surface 410 contacts the bottom layer 140 (GBL) of the multi-layer display panel 1 downward.
[0028] Specifically, the wiring part 4 extends from one side of the mask body 3, and the mask body 3 and the wiring part 4 are an integral whole, which is easy to manufacture; the mask body 3 is a three-layer structure, and the mask body 3 is composed of a diffusion film layer 310, a protective layer 320 and a foam layer 330 from top to bottom; the wiring part 4 is a four-layer structure, and the wiring part 4 is composed of a foam layer 330, a diffusion film layer 310, a protective layer 320 and a foam layer 330 from top to bottom. Compared with the mask body 3, the wiring part 4 has an additional foam layer 330, which mainly plays an isolation role to prevent the wiring circuit from directly contacting other components and improve touch reliability.
[0029] As an example, Figure 3 , 4, 5 and 6, the display panel 1 adopts four layers, and the display panel 1 includes a top layer 110, an inner layer 120, an inner second layer 130 and a bottom layer 140 from top to bottom. The bottom layer 140 is provided with a touch socket 141, a chip 142, a touch wiring 143 and a second shielding grid 144 respectively. The touch socket 141 is located on the side of the bottom layer 140. The touch film 2 is electrically connected to the touch socket 141 through the wiring part 4. The mask wiring 312 is electrically connected to the chip 142 through the touch socket 141 and the touch wiring 143 in turn. The bottom layer 140 also adopts a shielding grid instead of paving all copper. In this way, the signal-to-noise ratio can be improved while preventing the touch signal from becoming too weak. The touch film 2 is connected to the display panel 1 through the touch socket 141. When the user operates the touch button, a touch signal is generated on the mask body 3, which is processed on the chip 142 through the touch socket 141 and the touch wiring 143. Specifically, the top layer 110 is a GTL board, the inner layer 120 is an L2 board, the inner second layer 130 is an L3 board, and the bottom layer 140 is a GBL board.
[0030] Specifically, each layer of the display panel 1 adopts different shielding and anti-interference methods according to different situations.
[0031] like Figure 3 A second shielding grid 144 is provided on the bottom layer 140 to improve the signal-to-noise ratio while preventing the touch signal from becoming too weak.
[0032] like Figure 4 , the lines of the inner second layer 130 are laid with copper in a large grid form and partially covered with copper. Because the distance between the inner second layer 130 and the bottom layer 140 is very close, most of the copper is laid in a grid form to avoid the touch signal from being weakened. Partially covering with copper can improve the anti-interference effect.
[0033] like Figure 5 and 6 The inner layer 120 and the top layer 110 routing lines are far away from the touch lines of the bottom layer 140. In order to improve the anti-interference effect, a full copper paving method is adopted.
[0034] As an example, Figure 3 The touch sockets 141 are respectively arranged on the left and right sides of the bottom layer 140, and the touch films 2 correspond to the touch sockets 141 one by one. Two touch films 2 are arranged to facilitate setting of multiple buttons and convenient operation.
[0035] The display panel 1 is suitable for touch display occasions such as household appliances and automotive electronics. The touch film 2 is connected to the touch sockets 141 at the left and right ends of the display panel 1 through the contact surface 410. After the user presses a button and generates a touch signal on the mask body 3, the signal passes through the touch socket 141 and the touch wiring 143 on the bottom layer 140 and is processed on the chip 142.
[0036] Specifically, the principle of the present invention is to set a first shielding grid 3121 in the shielding area 312, and the first shielding grid 312 is set around the touch button area 311. Compared with full copper plating, it can improve the signal-to-noise ratio while preventing the touch signal from becoming too weak.
[0037] Action process: After the user presses a button and a touch signal is generated on the mask body 3, the signal passes through the touch socket 141 and the touch trace 143 on the bottom layer 140 and is processed on the chip 142. The shielding network on the touch film 2 and the display panel 1 is connected to the ground wire, which can improve the signal-to-noise ratio of the touch signal. The shielding network on the bottom layer 140 and the touch film 2 is in the form of a grid, rather than full copper. This can improve the signal-to-noise ratio while preventing the touch signal from becoming too weak.
[0038] On the basis of the above scheme, if various changes or modifications to the utility model do not depart from the spirit and scope of the utility model, and if these changes and modifications fall within the claims and equivalent technical scope of the utility model, the utility model is also intended to include these changes and modifications.
Claims
1. A touch display panel anti-interference structure, comprising a display panel (1) and a touch film (2), characterized in that: The touch film (2) comprises: A mask body (3); the mask body (3) comprises a diffusion film layer (310), and the diffusion film layer (310) is respectively provided with a touch button area (311), a shielding area (312) and a mask wiring (313); the shielding area (312) surrounds the touch button area (311), and the shielding area (312) comprises a first shielding grid (3121); one end of the mask wiring (313) is electrically connected to the touch button area (311), and the other end of the mask wiring (313) is electrically connected to the display panel (1) through the shielding area (312).
2. The anti-interference structure of a touch display panel according to claim 1, characterized in that: The facial mask body (3) further comprises a protective layer (320) and a foam layer (330), wherein the protective layer (320) is arranged on the bottom surface of the diffusion membrane layer (310), and the foam layer (330) is arranged on the bottom surface of the protective layer (320).
3. The anti-interference structure of a touch display panel according to claim 2, characterized in that: The mask body (3) extends outward to form a wiring portion (4), and a foam layer (330) is also provided on the upper surface of the wiring portion (4). The other end of the mask wiring (313) passes through the wiring portion (4) and is electrically connected to the display panel (1).
4. The anti-interference structure of a touch display panel according to claim 1, characterized in that: The display panel (1) comprises, from top to bottom, a top layer (110), an inner layer (120), a second inner layer (130) and a bottom layer (140); the bottom layer (140) is provided with a touch socket (141), a chip (142), a touch wiring (143) and a second shielding grid (144); the touch film (2) is electrically connected to the touch socket (141) through a wiring portion (4); and the mask wiring (313) is electrically connected to the chip (142) through the touch socket (141) and the touch wiring (143) in sequence.
5. The anti-interference structure of a touch display panel according to claim 4, characterized in that: The end of the wiring portion (4) is provided with a contact surface (410), and the contact surface (410) is electrically connected to the touch socket (141).
6. The anti-interference structure of a touch display panel according to claim 4, characterized in that: The inner two layers (130) are respectively provided with a large-area shielding grid and a local full copper layer.
7. The anti-interference structure of a touch display panel according to claim 4, characterized in that: A full copper layer is provided on the inner layer (120).
8. The anti-interference structure of a touch display panel according to claim 4, characterized in that: The top layer (110) is also provided with a full copper layer.
9. The anti-interference structure of a touch display panel according to claim 4, characterized in that: The touch sockets (141) are respectively arranged on the left and right sides of the display panel (1), and the touch films (2) correspond to the touch sockets (141) one by one.