CN104867404A - Polaroid structure with touch electrode - Google Patents

Abstract

A polarizer structure with a touch electrode comprises an adhesive layer, a first protective layer, a polarizing layer, a second protective layer and a touch electrode layer. The first protective layer is formed on the surface of the adhesive layer and comprises a first surface adhered with the adhesive layer and a second surface opposite to the first surface; the polarizing layer is formed on the second surface; the second protective layer is formed on the surface of the polarizing layer and comprises a third surface adjacent to the polarizing layer and a fourth surface opposite to the third surface; the touch electrode layer is at least formed on one surface of the first protective layer and the second protective layer. The invention enables the polarizer structure to directly have the touch function, not only can meet the development trend of product thinning, but also can achieve the purposes of simple manufacturing process and effectively reducing production cost.

Description

Polarizer structure with touch electrodes

technical field

The invention relates to a polarizer structure, in particular to a polarizer structure with touch electrodes.

Background technique

With the progress of the times, technology products are more and more humanized design, and the birth of today's touch technology has created a new generation, and due to the vigorous development of high-tech electronic information industry, consumer electronics products have become a part of people's daily life The necessities of the devices are all moving towards the trend of thinning, especially the touch display device which combines display and input functions can greatly improve the practical performance of various types of consumer electronic products.

Generally, there are many ways to manufacture a touch display device, one of which is to combine a display panel and a touch panel by using a glue frame to integrate the touch function and the display function together. However, In this manufacturing method, the sealant is only coated on the periphery of the display panel or the touch panel, so that there is a gap between the touch panel and the display panel. The difference causes the problem of light leakage or light transmittance decrease in the display panel.

In order to improve this problem, there is a method of pasting with optical glue instead of frame glue. The optical glue is fully coated between the display panel and the touch panel, so the display panel will not have light leakage. And it has a good display effect, but the cost of the optical glue is relatively high and the problem of poor reliability is likely to occur after a long period of use.

In addition, using the method of laminating the touch panel and the display panel, it is easy to face the problem of glue overflow or air bubbles during the lamination process. The coating glue often needs to go through rigorous calculations, such as However, the height and thickness of the adhesive material are not easy to control, so it is easy to cause air bubbles between the touch panel and the display panel, which will affect the touch display. device yield. Furthermore, the above touch display device needs to manufacture the touch panel and the display panel separately and then bond them together, so it is not only bulky but also thick, which cannot meet the market's demand for thinning.

In order to reduce the above-mentioned thickness problem caused by the separate manufacture of the touch panel and the display panel, currently there are touch sensing electrodes with touch function integrated into the display panel, so that the display panel itself has a touch function, so no need Additional lamination of the touch panel can achieve thinning requirements, but the problems faced by this production method are increased production costs and cumbersome process programming, because the process methods of the display panel and the touch sensing electrodes are different. Therefore, the manufacturing process of the two is quite cumbersome, and because the touch sensing electrodes are arranged in the display panel, when the display panel is inspected during the manufacturing process, if the touch sensing electrodes are detected to be damaged or poorly connected, it cannot be targeted The touch sensing electrodes need to be maintained or replaced, which leads to a decrease in process yield, which in turn leads to an increase in production costs.

Based on the development and application of the above-mentioned touch display device, how to meet the development trend of thinning electronic products and effectively reduce the production cost is an important goal for the research and improvement of the present invention.

Contents of the invention

The purpose of the present invention is to provide a polarizer structure with touch electrodes that can reduce product thickness and production cost.

The polarizer structure with touch electrodes of the present invention comprises an adhesive layer, a first protective layer, a polarizing layer, a second protective layer, and a touch electrode layer.

The first protective layer is formed on the surface of the adhesive layer, including a first surface bonded to the adhesive layer, and a second surface opposite to the first surface; the polarizing layer is formed on the second surface; the polarizing layer is formed on the second surface; The second protective layer is formed on the surface of the polarizing layer, including a third surface adjacent to the polarizing layer, and a fourth surface opposite to the third surface; the touch electrode layer is formed at least on the first protective layer and the polarizing layer. One of the surfaces of the second protective layer.

In the polarizer structure with touch electrodes of the present invention, the touch electrode layer is formed on the second surface or the third surface.

In the polarizer structure with touch electrodes of the present invention, the touch electrode layer is formed on the third surface.

In the polarizer structure with touch electrodes of the present invention, the touch electrode layer includes a plurality of first sensing electrodes arranged along a first direction and not electrically connected to each other, and a plurality of electrodes The second sensing electrodes arranged in an angled second direction and not electrically connected to each other, and the first sensing electrodes and the second sensing electrodes are not electrically connected to each other.

In the polarizer structure with touch electrodes of the present invention, the first sensing electrode is formed on the first surface or the second surface, and the second sensing electrode is formed on the third surface or the fourth surface.

In the polarizer structure with touch electrodes of the present invention, the first sensing electrode is formed on the first surface, and the second sensing electrode is formed on the third surface.

In the polarizer structure with touch electrodes of the present invention, the touch electrode layer includes a plurality of first sensing electrodes arranged at intervals along a first direction and not electrically connected to each other, and a plurality of first sensing electrodes along the first direction. The direction of the second sensing electrodes is arranged alternately with the first sensing electrodes and is not electrically connected to each other. The first sensing electrodes and the second sensing electrodes are not electrically connected to each other, and are formed on the first protection layer and the second sensing electrode One of the surfaces of the two protective layers.

The polarizer structure with touch electrodes of the present invention, wherein the material of the touch electrode layer is selected from indium tin oxide, nano-silver wire, carbon nanotubes, conductive polymers and metal mesh, and the aforementioned One of the combinations.

The polarizer structure with touch electrodes of the present invention further includes a separation layer removably formed on the surface of the adhesive layer away from the first protective layer.

The polarizer structure with touch electrodes of the present invention further includes a surface protection layer removably formed on the fourth surface.

The beneficial effect of the present invention is that: the touch electrode layer is arranged and integrated in the polarizer structure of the display panel, so that the display panel can have display and touch functions at the same time without making another touch panel. To meet the development trend of thinner products, not only the manufacturing process is simple, but also the production cost can be effectively reduced.

Description of drawings

FIG. 1 is a three-dimensional exploded view illustrating a first preferred embodiment of the polarizer structure with touch electrodes of the present invention;

Fig. 2 is a schematic diagram illustrating the mode of the first preferred embodiment of the present invention in actual use;

FIG. 3 is a three-dimensional exploded view illustrating a second preferred embodiment of the polarizer structure with touch electrodes of the present invention;

FIG. 4 is an exploded perspective view illustrating a third preferred embodiment of the polarizer structure with touch electrodes of the present invention.

Detailed ways

Before the present invention is described in detail, it should be noted that in the following description, similar elements are denoted by the same numerals.

Referring to Fig. 1, the first preferred embodiment of the polarizer structure with touch electrodes of the present invention includes a separation layer 2, an adhesive layer 3, a first protective layer 4, a polarizing layer 5, a A second protective layer 6 , a touch electrode layer 7 , and a surface protective layer 8 .

The separation layer 2 can be made of polyethylene, polypropylene, or polyethylene terephthalate and other polymer materials with release effect.

The adhesive layer 3 is formed on the surface of the separation layer 2 , the separation layer 2 can be used to prevent the adhesive layer 3 from losing its viscosity, and the separation layer 2 is removably bonded to the adhesive layer 3 .

The first protective layer 4 is formed on the surface of the adhesive layer 3 and includes a first surface 41 adjacent to the adhesive layer 3 and a second surface 42 opposite to the first surface 41 . The first protective layer 4 can be made of polymer materials such as polyethylene, polyvinyl chloride, polycellulose triacetate, or polyethylene terephthalate.

The polarizing layer 5 is formed on the second surface 42 and is mainly composed of polyvinyl alcohol, which has the property of filtering light and passing light of a specific polarity.

The second protection layer 6 is formed on the surface of the polarizing layer 5 , including a third surface 61 adjacent to the polarizing layer 5 , and a fourth surface 62 opposite to the third surface 61 . The second protective layer 6 can also be made of polymer materials such as polyethylene, polyvinyl chloride, polycellulose triacetate, or polyethylene terephthalate, and can be the same as or different from the first protective layer 4 .

The touch electrode layer 7 is formed on any one of the second surface 42 or the third surface 61, and includes a plurality of first sensing electrodes 71 arranged at intervals along a first direction X and not electrically connected to each other, a plurality of The second sensing electrodes 72 arranged along a second direction Y at an angle to the first direction X and not electrically connected to each other, and a plurality of electrodes arranged at the intersection of the first sensing electrodes 71 and the second sensing electrodes 72 The insulating layer (not shown in the figure), the first direction X and the second direction Y are perpendicular to each other, and the first sensing electrode 71 and the second sensing electrode 72 are at an angle to each other and have no electrical connection. Preferably, the first sensing electrode 71 and the second sensing electrode 72 are formed on the third surface 61, and the constituent materials are selected from indium tin oxide, nano silver wire, carbon nanotube, conductive polymer, metal mesh grid and one of the aforementioned combinations. It should be noted that the first sensing electrodes 71 and the second sensing electrodes 72 are arranged according to the first direction X and the second direction Y, and when current is supplied to the first sensing electrodes 71 and the second sensing electrodes 72 After that, a uniform electric field will be formed. When touched, the touch point will cause a change in capacitance, and a relative induced current will be generated to detect the coordinates of the touch point, and then calculate the position of the touch point. In this way, the user can operate while visually viewing the content displayed on the display panel.

Specifically, in the first preferred embodiment, the touch electrode layer 7 can be fabricated by printing a plurality of first sensing electrodes arranged at intervals along the first direction X prior to the third surface 61 by using printing technology. 71, and then form an insulating layer on the surface of the first sensing electrode 71 where it is expected to meet the second sensing electrode 72, and then print to form a plurality of strips arranged at intervals along the second direction Y and connected to the first sensing electrode 72. The sensing electrode 71 forms an angled second sensing electrode 72 . Among them, the printing technology can use gravure printing with silver paste as transfer printing conductive ink, or use screen printing with poly 3,4-ethylenedioxythiophene (PEDOT) conductive polymer material, and the predetermined first induction The patterns of the electrodes 71 and the second sensing electrodes 72 are printed on the third surface 61 respectively, and then heated, baked and cured at a temperature of 80° C. to 100° C. to obtain them.

The surface protection layer 8 is removably formed on the fourth surface 62 , and polymer materials such as polyethylene, polyvinyl chloride, or polyethylene terephthalate can also be used.

With reference to FIG. 2 , the first preferred embodiment of the present invention can be attached to the surface of a display panel 100 by using the stickiness of the adhesive layer 3 after the separation layer 2 is removed in actual use, and then the The electrode circuit formed by the touch electrode layer 7 is electrically connected to a flexible circuit board (not shown), and then connected to an external control circuit (not shown) through the flexible circuit board, so that the display panel 100 It has a touch function, since it is well known in the technical field to electrically connect the electrode circuit of the touch electrode layer 7 with the flexible circuit board, and it is not the focus of the present invention, so no more details are given here.

In the present invention, by integrating the touch electrode layer 7 into the polarizer structure, the display panel 100 can achieve the effect of touch display. Its thickness is significantly reduced, and there is no problem of light leakage or decrease in transmittance; in addition, compared with the general manufacturing method of integrating the touch sensing electrodes into the display panel, the present invention not only has a simple manufacturing process, but also can effectively improve the manufacturing process quality. rate, with the improvement of the process yield, the effect of reducing costs is achieved; moreover, during the inspection of the production process, if it is found that the first sensing electrode 71 and the second sensing electrode 72 are damaged or have poor contact, only It is only necessary to replace the polarizer with a new one or disassemble the polarizer for maintenance, without replacing a new display panel.

Referring to FIG. 3 , the second preferred embodiment of the polarizer structure with touch electrodes of the present invention is substantially the same as the first preferred embodiment, except that in the second preferred embodiment, the touch electrode layer 7 The first sensing electrode 71 is formed on any one of the first surface 41 or the second surface 42 , and the second sensing electrode 72 is formed on the third surface 61 or the fourth surface 62 either surface. Preferably, the first sensing electrode 71 is formed on the first surface 41 , and the second sensing electrode 72 is formed on the third surface 61 . In the second preferred embodiment, since the first sensing electrode 71 and the second sensing electrode 72 are respectively disposed on the first surface 41 and the third surface 61, there is no need to add an additional insulating layer, which can The manufacturing process is simplified and the manufacturing cost can be saved.

Referring to FIG. 4 , the third preferred embodiment of the polarizer structure with touch electrodes of the present invention is substantially the same as the first preferred embodiment, except that in the third preferred embodiment, the touch electrode layer 7 The first sensing electrode 71 and the second sensing electrode 72 are formed on one surface of the first protection layer 4 and the second protection layer 6 . In detail, the touch electrode layer 7 has a plurality of first sensing electrodes 71 arranged at intervals along the first direction X and not electrically connected to each other, and a plurality of first sensing electrodes 71 connected to the first sensing electrodes 71 along the first direction X. The electrodes 71 are arranged in a staggered manner and the second sensing electrodes 72 are not electrically connected to each other. The first sensing electrodes 71 and the second sensing electrodes 72 are not electrically connected to each other, and are formed on the first protective layer 4 and the second protective layer at the same time. One of the surfaces of 6. Preferably, the first sensing electrodes 71 and the second sensing electrodes 72 are formed on the third surface 61 , and are arranged in a comb shape and complement each other closely.

In the third preferred embodiment of the present invention, although the first sensing electrodes 71 and the second sensing electrodes 72 are formed on the third surface 61 at the same time, they are only closely arranged and not angled or electrically connected to each other, so there is no An insulating layer needs to be added, so it also has the advantages of simplifying the manufacturing process and saving the manufacturing cost.

To sum up, the present invention uses the touch electrode layer 7 to be integrated in the polarizer structure of the display panel, so that the display panel can have both display and touch functions without making another touch panel , which can meet the development trend of product thinning; in addition, the first sensing electrode 71 and the second sensing electrode 72 can be formed on the surface of the first protective layer 4 and the second protective layer 6 by printing technology, not only the process Simple also can effectively reduce production cost, so can really reach the purpose of the present invention.

Claims (10)

1. A polarizer structure with touch electrodes, comprising one layer of adhesive layer, one layer of first protective layer, one layer of polarizing layer, one layer of second protective layer, and one layer of touch electrode layer; it is characterized in that: The first protective layer is formed on the surface of the adhesive layer, including a first surface bonded to the adhesive layer, and a second surface opposite to the first surface; the polarizing layer is formed on the second surface; the polarizing layer is formed on the second surface; The second protective layer is formed on the surface of the polarizing layer, including a third surface adjacent to the polarizing layer, and a fourth surface opposite to the third surface; the touch electrode layer is formed at least on the first protective layer and the polarizing layer. One of the surfaces of the second protection layer. 2 . The polarizer structure with touch electrodes as claimed in claim 1 , wherein the touch electrode layer is formed on the second surface or the third surface. 3 . The polarizer structure with touch electrodes as claimed in claim 2 , wherein the touch electrode layer is formed on the third surface. 4 . 4. The polarizer structure with touch electrodes according to claim 1, characterized in that: the touch electrode layer comprises a plurality of first sensing electrodes arranged along a first direction and not electrically connected to each other, and a plurality of The strips are second sensing electrodes arranged along a second direction at an angle to the first direction and are not electrically connected to each other, and the first sensing electrodes and the second sensing electrodes are not electrically connected to each other. 5. The polarizer structure with touch electrodes according to claim 4, characterized in that: the first sensing electrode is formed on the first surface or the second surface, and the second sensing electrode is formed on the first surface Three or fourth surface. 6 . The polarizer structure with touch electrodes as claimed in claim 5 , wherein the first sensing electrode is formed on the first surface, and the second sensing electrode is formed on the third surface. 7. The polarizer structure with touch electrodes according to claim 1, wherein the touch electrode layer comprises a plurality of first sensing electrodes arranged at intervals along a first direction and not electrically connected to each other, and a plurality of second sensing electrodes that are alternately arranged with the first sensing electrodes along the first direction and are not electrically connected to each other, and the first sensing electrodes and the second sensing electrodes are not electrically connected to each other and are formed at the same time One surface of the first protection layer and the second protection layer. 8. The polarizer structure with touch electrodes according to claim 1, characterized in that: the material of the touch electrode layer is selected from indium tin oxide, nano-silver wire, carbon nanotubes, conductive polymers, metal mesh grid, and one of the aforementioned combinations. 9 . The polarizer structure with touch electrodes as claimed in claim 1 , further comprising a separation layer removably formed on the surface of the adhesive layer away from the first protection layer. 10 . The polarizer structure with touch electrodes as claimed in claim 1 , further comprising a surface protection layer removably formed on the fourth surface. 11 .