Color panel and touch sensing integrated structure and preparation process thereof

Abstract

The invention relates to the technical field of touch panels, in particular to a color panel and touch sensing integrated structure and a preparation process thereof, the structural scheme that a color film, a sensor and an FPC are separately manufactured in a traditional scheme is integrated into an integrated scheme, the functions of the color film, the sensor and the FPC are integrated on one PET polyester film, the manufacturing process is simplified accordingly, and the manufacturing cost is reduced. A sensor and an FPC (Flexible Printed Circuit) are constructed and integrated on a PET (Polyethylene Terephthalate) base material and a decorative panel ink layer, namely, FPC, an ITO (Indium Tin Oxide) film, OCA (Optical Clear Adhesive), an etching engineering material and the like are not included in the design; new material transparent conductive ink is printed on the PET substrate and the bottom surface of the ink layer of the decorative panel to obtain a touch electrode; a signal is output by printing silver paste ink, plug-in parts share the PET base material and the decorative panel ink layer, golden finger packaging protection is carried out at the plug-in position of the silver paste ink and the main board, and packaging can be completed only through one electrical testing and inspection procedure.

Description

Technical Field

[0001] The present invention relates to the technical field of touch panels, and in particular to a color panel and touch sensor integrated structure and a preparation process thereof. Background Art

[0002] Traditional membrane switch solutions for traditional home appliance control panels and capacitive touch panel solutions for home appliances both manufacture the color film, sensor, and FPC separately, then use the ACF (anisotropic conductive adhesive) bonding process to bind the sensor to the FPC, and use the optical adhesive (OCA) bonding process to bond the color film to the sensor.

[0003] Disadvantages of traditional solutions:

[0004] 1) The BOM solution involves many parts and the BOM cost is high;

[0005] 2) It includes independent sensor process and back-end assembly process, with long production cycle and high manufacturing and labor costs;

[0006] 3) The product is heavy, and the downstream assembly design space is relatively limited, making assembly difficult. Summary of the invention

[0007] The object of the present invention is to provide a color panel and touch sensor integrated structure and a preparation process thereof, so as to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A color panel and touch sensor integrated structure, comprising:

[0010] A PET substrate, a decorative panel ink layer is disposed on the PET substrate, and a sensor conductive ink layer is disposed on the decorative panel ink layer;

[0011] The sensor conductive ink layer includes a transparent conductive ink layer arranged in a light-transmitting area on the decorative panel ink layer, a silver paste ink arranged in an opaque area of ​​the decorative panel ink layer and connected to the transparent conductive ink layer, and a carbon paste ink arranged at a gold finger at the end of the silver paste ink extending out of the decorative panel ink layer.

[0012] Preferably, a transparent insulating protective ink layer is covered on the transparent conductive ink layer and the silver paste ink to protect the transparent conductive ink layer and the silver paste ink.

[0013] Preferably, the bending area of ​​the silver paste ink is provided with foam paper.

[0014] A process for preparing the above-mentioned color panel and touch sensor integrated structure includes:

[0015] S1: Using a color printing process on the PET substrate and UV curing, the ink layer of the decorative panel is attached to the PET substrate;

[0016] S2: Printing a transparent conductive ink layer on the decorative panel ink layer and baking and curing it to serve as a touch electrode;

[0017] S3: printing silver paste ink connected to the transparent conductive ink layer on the decorative panel ink layer and the PET substrate and baking and curing the silver paste ink to serve as a conductive wire;

[0018] S4: setting a gold finger at the end of the silver paste ink, and printing carbon paste ink at the gold finger and baking and fixing it;

[0019] S5: cutting the PET substrate, and cutting off the portion with the decorative panel ink layer and the sensor conductive ink layer;

[0020] S6: Printing the transparent insulating protective ink layer on the transparent conductive ink layer and the silver paste ink and drying and curing them;

[0021] S7: Paste foam paper on the bending area of ​​the silver paste ink.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention integrates the traditional color film, sensor, and FPC separately manufactured structural solutions into an integrated solution, and integrates the color film, sensor, and FPC functions into a PET polyester film, thereby simplifying the manufacturing process. The sensor and FPC flexible circuit board are constructed and integrated on the PET substrate and the decorative panel ink layer, that is, the design does not include FPC, ITO film, OCA, etching engineering materials, etc.; instead, a new material transparent conductive ink is printed on the bottom surface of the PET substrate and the decorative panel ink layer to obtain a touch electrode; then, the signal is output by printing silver paste ink, and the plug-in parts also share the PET substrate and the decorative panel ink layer. Finally, the silver paste ink and the mainboard plug-in position are packaged for protection with gold fingers, and only one electrical test and inspection process is required to complete the packaging;

[0024] 1) The BOM solution involves fewer parts and the BOM cost is lower;

[0025] 2) The integrated solution does not require assembly process, has a short process cycle, low process difficulty, and low labor and manufacturing costs;

[0026] 3) The product is thin and light, which is conducive to the design space of the downstream whole machine and is easy to assemble;

[0027] 4) The bending life of the transparent conductive ink layer is much longer than that of the ITO material, and it is more suitable for the application of personalized decorative panel ink layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the axonometric structure of the present invention.

[0030] In the figure: 1. PET substrate; 2. Decorative panel ink layer; 3. Sensor conductive ink layer; 301. Transparent conductive ink layer; 302. Silver paste ink; 303. Carbon paste ink; 4. Transparent insulating protective ink layer; 5. Foam paper. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1 to Figure 2 , the present invention provides a technical solution:

[0033] A color panel and touch sensor integrated structure, comprising:

[0034] PET substrate 1, PET substrate 1 is a polyester film, a decorative panel ink layer 2 is arranged on the PET substrate 1, the decorative panel ink layer 2 is a color ink printed on the PET substrate 1, the specific shape of the decorative panel ink layer 2 on the PET substrate 1 can be set according to actual use conditions, and a sensor conductive ink layer 3 is arranged on the decorative panel ink layer 2.

[0035] The sensor conductive ink layer 3 is divided into a transparent conductive ink layer 301, a silver paste ink 302, and a carbon paste ink 303; the transparent conductive ink layer 301 is arranged in the light-transmitting area required by the decorative panel ink layer 2, as a touch sensing electrode, that is, a touch button, the silver paste ink 302 is arranged in the light-impermeable area of ​​the decorative panel ink layer 2 and is connected to the transparent conductive ink layer 301, as a conductor, plays the role of the transparent conductive ink layer 301 and the gold finger, the end of the silver paste ink 302 not connected to the transparent conductive ink layer 301 extends out of the decorative panel ink layer 2 and is arranged on the PET substrate 1, and a gold finger is arranged on the end not connected to the transparent conductive ink layer 301, and the gold finger is connected to the interface between the touch integrated product and the home appliance motherboard, and the carbon paste ink 303 is arranged at the gold finger to enhance the weather resistance of the product.

[0036] A transparent insulating protective ink layer 4 is covered on the transparent conductive ink layer 301 and the silver paste ink 302 , so that the transparent protective ink layer wraps the transparent conductive ink layer 301 and the silver paste ink 302 to protect the transparent conductive ink layer 301 and the silver paste ink 302 .

[0037] The bending area of ​​the silver paste ink 302 is provided with foam paper 5, that is, when the silver paste ink 302 passes through the transition position between the PET substrate 1 and the decorative panel ink layer 2, a bend will occur. The foam paper 5 is provided here to enhance the folding resistance.

[0038] Process flow: The decorative panel ink layer 2 is attached to the PET substrate 1 through a color printing process and UV curing;

[0039] On the decorative panel ink layer, a transparent conductive ink layer 301 is printed and baked to be cured to serve as a touch electrode;

[0040] Silver paste ink 302 connected to the transparent conductive ink layer 301 is printed on the decorative panel ink layer and the PET substrate 1 and baked and cured to serve as a conductive wire;

[0041] A gold finger is set at the end of the silver paste ink 302, and a carbon paste ink 303 is printed at the gold finger and baked to fix;

[0042] The PET substrate 1 is cut into pieces, and the portion with the decorative panel ink layer 2 and the sensor conductive ink layer 3 is cut off;

[0043] Printing a transparent insulating protective ink layer 4 on the transparent conductive ink layer 301 and the silver paste ink 302 and drying and curing;

[0044] Foam paper 5 is pasted on the bending area of ​​the silver paste ink 302.

[0045] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A color panel and touch sensor integrated structure, characterized in that: include: A PET substrate, a decorative panel ink layer is disposed on the PET substrate, and a sensor conductive ink layer is disposed on the decorative panel ink layer; The sensor conductive ink layer includes a transparent conductive ink layer arranged in a light-transmitting area on the decorative panel ink layer, a silver paste ink arranged in an opaque area of ​​the decorative panel ink layer and connected to the transparent conductive ink layer, and a carbon paste ink arranged at a gold finger at the end of the silver paste ink extending out of the decorative panel ink layer.

2. The color panel and touch sensor integrated structure according to claim 1, characterized in that: A transparent insulating protective ink layer is covered on the transparent conductive ink layer and the silver paste ink to protect the transparent conductive ink layer and the silver paste ink.

3. The color panel and touch sensor integrated structure according to claim 2, characterized in that: The bending area of ​​the silver paste ink is provided with foam paper.

4. A process for preparing a color panel and touch sensor integrated structure as described in any one of claims 1 to 3, characterized in that: include: S1: Using a color printing process on the PET substrate and UV curing, the ink layer of the decorative panel is attached to the PET substrate; S2: Printing a transparent conductive ink layer on the decorative panel ink layer and baking and curing it to serve as a touch electrode; S3: printing silver paste ink connected to the transparent conductive ink layer on the decorative panel ink layer and the PET substrate and baking and curing the silver paste ink to serve as a conductive wire; S4: setting a gold finger at the end of the silver paste ink, and printing carbon paste ink at the gold finger and baking and fixing it; S5: cutting the PET substrate, and cutting off the portion with the decorative panel ink layer and the sensor conductive ink layer; S6: Printing the transparent insulating protective ink layer on the transparent conductive ink layer and the silver paste ink and drying and curing them; S7: Paste foam paper on the bending area of ​​the silver paste ink.

Images