CN103425324B - Polarisation filtration module and touch display screen - Google Patents

Abstract

A kind of polarisation filtration module, including：Optical filter module, optical filter module include carrying substrates, shading matrix and the chromatic photoresist being scattered in shading matrix, and shading matrix includes the ruling formed by light screening material；And polaroid module, polaroid module include polarizer substrate material；The conductive layer being arranged in polarizer substrate material, conductive layer includes the first conductive pattern and the second conductive pattern, first and second conductive pattern spaced formation induction structure on the extension direction of polarizer substrate material, first and second conductive pattern includes the conductive grid formed by conductive thread interconnection, and conductive thread projects to fall on the ruling of shading matrix on shading matrix；And protection glue-line, coating is on the electrically conductive.Above-mentioned polarisation filtration module can realize touch control operation and outgoing polarization light function simultaneously, during in display screen, have touch controllable function, without assembling touch-screen again, not only reduce the thickness of electronic product, while also save cost.A kind of touch display screen is also provided.

Description

Polarization filter module and touch display

technical field

The invention relates to a touch screen, in particular to a polarized light filter module and a touch screen.

Background technique

A touch screen is an inductive device that receives an input signal from a touch lamp. The touch screen has endowed information interaction with a new look and is a very attractive new information interaction device. The development of touch screen technology has aroused widespread concern in the information media circles at home and abroad, and has become a rising high-tech industry in the optoelectronic industry.

At present, electronic products with a touch display function include a display screen and a touch screen located on the display screen. However, as a component independent of the display screen, the touch screen needs to be used according to the display screen when it is used in some electronic products that realize human-computer interaction. The size of the order is ordered, and then assembled. There are two main ways to assemble the existing touch screen and display screen, that is, frame paste and full fit. Fit the lower surface of the touch screen to the upper surface of the display screen.

As a combined module of polarizers, filters, liquid crystal modules, and TFTs, the display screen has a large thickness. At the same time, the touch screen and the display screen are independent components. When assembling electronic products, not only complex assembly processes are required, but also Increasing the thickness and weight of electronic products again, and adding an assembly process means increasing the probability of product failure and greatly increasing the production cost of the product.

Contents of the invention

Based on this, it is necessary to provide a polarizing filter module and a touch display screen using the polarizing filter module, which are beneficial to reduce the thickness and production cost of electronic products.

A polarized light filter module, comprising:

A filter module, the filter module includes a carrier substrate, a light-shielding matrix, and color photoresists dispersed in the light-shielding matrix, the light-shielding matrix includes grid lines formed of light-shielding materials; and

Polarizer module, the polarizer module includes:

Polarizer substrate;

A conductive layer disposed on the polarizer base material, the conductive layer includes a first conductive pattern and a second conductive pattern, and the first conductive pattern and the second conductive pattern are in the extending direction of the polarizer base material Inductive structures are formed at intervals, the first conductive pattern and the second conductive pattern include a conductive grid, the conductive grid is formed by cross-connecting conductive threads, and the conductive threads are projected on the light-shielding matrix and fall on the light-shielding matrix. on the grid of the matrix; and

A protective glue layer is coated on the conductive layer.

In one embodiment, the material of the conductive thread is metal, carbon nanotube, graphene, organic conductive polymer or ITO.

In one of the embodiments, the width of the conductive thread is not larger than the width of the grid line.

In one of the embodiments, the first conductive pattern and the second conductive pattern are obtained by etching the metal coating attached to the surface of the polarizer substrate, and the first conductive pattern and the second conductive pattern are embedded in the The protective glue layer is close to the side of the upper polarizer.

In one embodiment, the metal plating layer includes at least one metal selected from silver, copper, zinc, gold and nickel.

In one embodiment, at least two second conductive patterns spaced apart from each other are arranged on one side of each first conductive pattern, and the second conductive patterns on both sides of each first conductive pattern are insulated from each other.

In one embodiment, both the first conductive pattern and the second conductive pattern are provided with lead wires, and the lead wires have a grid structure or a solid line structure.

In one of the embodiments, the conductive layer further includes a conductive bridge, the conductive bridge spans the first conductive pattern and is electrically connected to two second conductive patterns on opposite sides of the first conductive pattern. , an insulating layer is formed between the conductive bridge and the first conductive pattern.

In one of the embodiments, the conductive bridge is formed of a transparent conductive material, the two ends of the conductive bridge are directly overlapped with two second conductive patterns located on both sides of the first conductive pattern, and the electrical block Each end of the bridge is overlapped with at least two conductive threads in the corresponding second conductive pattern.

In one embodiment, the conductive bridge is embedded in the protective adhesive layer, the conductive bridge and the first conductive pattern are spaced from each other in the thickness direction of the protective adhesive layer, and the protective adhesive layer A portion between the conductive bridge and the first conductive pattern constitutes the insulating layer.

In one embodiment, the conductive bridge is a conductive grid formed by cross-connecting conductive wires, a first conductive block and a second conductive block are arranged at both ends of the conductive bridge, and the first conductive block and the second conductive block The conductive blocks are respectively electrically connected to the two second conductive patterns on both sides of the first conductive pattern.

In one embodiment, the first conductive block is electrically connected to at least two conductive threads of the corresponding second conductive pattern, and the second conductive block is electrically connected to at least two conductive threads of the corresponding second conductive pattern. Conductive thread.

In one of the embodiments, the protective adhesive layer faces away from the filter module.

In one embodiment, the protective adhesive layer faces the filter module and is clamped between the polarizer substrate and the filter module.

A touch display screen, comprising sequentially stacked TFT electrodes, a liquid crystal module, a common electrode and a polarizing filter module according to any one.

In one embodiment, the protective adhesive layer, the first conductive pattern and the first conductive pattern of the polarizer module are sandwiched between the polarizer base material and the filter module.

In the above-mentioned polarized light filter module and the touch screen using the polarized light filter module, the polarized light filter module can realize touch operation and output polarized light function at the same time, as an indispensable component in the display screen, it is used in the display screen At the same time, the display screen can be provided with a touch function directly, and there is no need to assemble a touch screen on the display screen, which not only helps to reduce the thickness of electronic products, but also greatly saves material and assembly costs.

Description of drawings

FIG. 1 is a schematic structural view of a touch display screen according to an embodiment;

2 is a schematic structural view of a polarizing filter module in an embodiment;

Fig. 3 is a schematic structural diagram of a polarizer module of an embodiment;

4 is a schematic structural view of a conductive layer of an embodiment;

Figure 4a is a schematic structural view of a conductive thread of an embodiment;

Fig. 4b is a schematic structural diagram of a conductive thread of another embodiment;

Fig. 4c is a schematic structural diagram of a conductive thread in another embodiment;

Fig. 4d is a schematic structural diagram of a conductive thread in another embodiment;

Fig. 5 is a schematic diagram of the preparation process of the conductive layer of an embodiment;

6 is a schematic structural diagram of a polarizer module in another embodiment;

FIG. 7 is a schematic structural diagram of a conductive layer in another embodiment.

detailed description

In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementations disclosed below.

It should be noted that when an element is referred to as being “fixed” to another element, it can be directly on the other element or there can also be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or intervening elements may also be present.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the technical field of the invention. The terms used herein in the description of the present invention are for the purpose of describing specific embodiments only, and are not intended to limit the present invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The invention proposes a polarizer module, a preparation method thereof, and a touch display screen using the polarizer, which are beneficial to reducing the thickness and production cost of electronic products. The polarizer module can realize touch operation and display functions, so that the touch display screen has a touch display function.

Referring to FIG. 1 , a touch display screen 100 according to an embodiment includes a lower polarizer 10 , a TFT electrode 20 , a liquid crystal module 30 , a common electrode 40 , a protective film 50 and a polarizing filter module 200 stacked in sequence.

The TFT electrode 20 includes a glass base layer 24 and a display electrode 22 disposed on the glass base layer 24 .

It can be understood that when a backlight is used as a polarized light source, such as an OLED polarized light source, the lower polarizer 10 is not needed, and only the polarizing filter module 200 is required. The protective film 50 may also be omitted.

The structures and functions of the lower polarizer 10 , the TFT electrodes 20 , the liquid crystal module 30 , the common electrode 40 , and the protective film 50 in this embodiment may be the same as those of existing products, and details will not be repeated here.

The touch display screen 100 has functions of touch operation and polarizable light at the same time, so that the display screen has a touch display function. The display screen can be a liquid crystal display screen of a direct-down type or a side-down type light source.

The following description focuses on the polarization filter module 200 .

Please refer to FIG. 2 , a polarizing filter module 200 according to an embodiment includes a filter module 201 and a polarizer module 202 .

The filter module 201 includes a carrier substrate 21 and a filter 23. The filter 23 includes a light-shielding matrix 233 and color photoresists 231 dispersed in the light-shielding matrix. The light-shielding matrix 233 includes grid lines formed of light-shielding materials.

The polarizer module 202 is sequentially stacked with a polarizer substrate 210 , a protective glue layer 230 and a conductive layer 220 .

The polarizer substrate 210 is used to convert incident light into polarized light. In this embodiment, the polarizer substrate 210 is an organic flexible substrate, which can be applied to a roll-to-roll process and is suitable for mass production.

Referring to FIGS. 2 and 3 , the conductive layer 220 is disposed on the polarizer substrate 210 . The conductive layer 220 includes a first conductive pattern 222 and a second conductive pattern 224 , and the first conductive pattern 222 and the second conductive pattern 224 are spaced apart from each other to form a sensing structure.

Please refer to FIG. 4, the first conductive pattern 222 and the second conductive pattern 224 of the conductive layer 220 can be a conductive pattern of a single-layer multi-point structure, that is, at least two first conductive patterns 222 are arranged on one side of each first conductive pattern 222. Two conductive patterns 224 , an insulating region 37 is disposed between the first conductive pattern 222 and the second conductive pattern 224 , and the second conductive patterns 224 on both sides of each first conductive pattern 222 are insulated from each other. Both the first conductive pattern 222 and the second conductive pattern 224 are provided with lead wires 35 leading to the edge of the protective adhesive layer. The lead wires 35 can be solid wires or grid lines formed by a grid arrangement.

The protective adhesive layer 230 can be applied on the conductive layer 220 by coating, and the hardness of the protective adhesive layer 230 is not high, which is beneficial to pattern processing.

The first conductive pattern 222 and the second conductive pattern 224 can be conductive grids respectively, and the conductive grids are formed by cross-connecting conductive wires 34 , and the basic grid shape of the conductive wires 34 can be a regular grid or a random grid. The line width of the conductive thread 34. It can be 500nm～5 μm, and the conductive thread 34 can be obtained by performing imprint etching on the conductive layer 220. The conductive material can be metal, carbon nanotube, graphene, organic conductive polymer and ITO, etc., preferably metal (such as nano-silver pulp).

The conductive wires 34 of the conductive grid may not be aligned with the grid lines in the light-shielding matrix of the optical filter 64 in the optical filter module 60 , or may be aligned. When the conductive wires 34 are not aligned with the grid lines in the light-shielding matrix, in order to ensure the light transmittance of the filter module 60 and thereby ensure the color rendering of the display screen, the line width of the conductive wires 34 of the conductive grid is in the range of 500nm to 5 μm inside to make the conductive mesh visually transparent.

In one embodiment, the conductive thread 34 in the first conductive pattern 222 and the second conductive pattern 224 is facing the light-shielding resin or ink in the filter module, that is, the projection of the conductive thread 34 on the plane where the light-shielding resin or ink is located is just right. All fall on the light-shielding resin or ink, and the conductive thread 34 is blocked by the light-shielding resin or ink, which will not affect the light transmittance of the display screen, and the thickness requirements of the conductive thread 34 do not need to be visually transparent, as long as the conductive thread 34 The thickness of the film should be smaller than that of the light-shielding resin or ink frame line.

As shown in FIG. 4 a , the conductive grids of the first conductive pattern 222 and the second conductive pattern 224 may be rectangular, and one grid unit of each conductive grid is facing one filter unit grid on the light shielding layer.

As shown in FIG. 4 b , the first conductive pattern 222 and the second conductive pattern 224 may also be such that one grid unit of each conductive grid faces multiple filter unit grids on the light shielding layer.

Wherein, as shown in FIG. 4 b , the conductive wires 34 of the conductive grid may be straight lines. As shown in Figures 4c and 4d, the conductive thread 34 of the conductive grid can also be a curve, that is, the grid unit of the conductive grid can be in a random pattern, as long as the conductive thread is blocked by light-shielding resin or ink. Likewise, one grid unit of each conductive grid may face multiple filter unit grids on the light-shielding layer.

The structure of the conductive layer 220 can be any structure that constitutes touch sensing.

Referring to FIG. 5, when the conductive layer 220 is a single-layer multi-point structure, the manufacturing process of the first conductive pattern 222 and the second conductive pattern 224 of the embossed structure can be as follows:

(1) providing a polarizer substrate 210;

(2) Prepare a conductive layer 220 on one surface of the polarizer substrate 210 , and the electrical layer 220 includes a first conductive pattern 222 and a second conductive pattern 224 .

In this embodiment, a layer of metal layer 212 is plated on the surface of the polarizer substrate 210, then glue is applied, and then the first conductive pattern 222 and the second conductive pattern 224 are formed by etching. The first conductive pattern 222 and the second conductive pattern 224 are spaced apart from each other to form a conductive layer 220 with a sensing structure.

(3) Coating glue on the conductive layer 220 to form a protective glue layer 230 . The protective adhesive layer 230 completely covers the conductive layer 220 . In this embodiment, UV glue is preferably used.

The first conductive pattern 222 and the second conductive pattern 224 formed by plating metal can also be used for the bridging structure.

Please refer to FIG. 6 and FIG. 7 , in another embodiment, the conductive layer 220 may also be a bridging structure. The conductive layer 220 may further include a conductive bridge 226, the conductive bridge 226 spans the first conductive pattern 230, an insulating layer 228 is formed between the conductive bridge 226 and the first conductive pattern 222, and the conductive bridge 226 is respectively electrically connected to the first conductive pattern 230. There are two second conductive patterns 224 on both sides of the conductive pattern 222 . In this embodiment, the conductive bridge 226 is embedded in the protective adhesive layer 230 , and the insulating layer 228 between the conductive bridge 226 and the first conductive pattern 222 is an adhesive layer.

Please refer to FIG. 6 , the conductive bridge 226 may be a transparent conductive material, which is beneficial to improve the light transmittance of the polarizer module 200 . In this embodiment, the conductive bridges 226 may be cross-connected by the conductive wires 34 to form grid lines. Further, the first conductive block 26 and the second conductive block 26' can be respectively arranged at both ends of the conductive bridge 226. Since the surface area of the first conductive block 26 and the second conductive block 26' is larger than that of the conductive bridge 226, they are compatible with the second conductive block. The pattern 224 has a larger contact surface, the first conductive block 26 can be electrically connected to at least two conductive threads 34 of the corresponding second conductive pattern 224, and the second conductive block 26' is electrically connected to the corresponding second conductive pattern 224. At least two conductive wires to ensure the effectiveness of electrical bonding (if one of them breaks, the others can still be conducted).

The conductive bridge 226 can also be formed by embossing. The arched grid conductive bridge 226 can be embossed at one time, or the plug hole of the conductive block can be formed first by photolithography exposure to obtain the plug hole, and then embossed to form a mesh. The grid groove is etched to form a conductive bridge 226 with a grid structure and conductive blocks.

The present invention has the following advantages:

(1) The polarized light filter module in the present invention can realize the touch operation and output polarized light function at the same time, as an indispensable component in the display screen, when used in the display screen, it can directly make the display screen have a touch function, There is no need to assemble a touch screen on the display screen, which not only helps to reduce the thickness of the electronic product, but also greatly saves material and assembly costs.

(2) In the present invention, the grid-shaped touch conductive pattern can be used to achieve visual transparency by controlling the width and density of the grid lines. The material selected for the conductive pattern is expanded from traditional transparent materials to all suitable conductive materials. When conductive When the pattern is made of metal material, the resistance can be greatly reduced to reduce the energy consumption of the touch screen.

(3) The conductive pattern is formed into a grid once by graphic embossing, and the process of patterned etching (film formation-exposure-development-etching) is transferred to the embossing mold at one time, and each piece of conductive pattern can be embossed and formed at one time , the grid shape and pattern are formed at one time, and there is no need for pattern etching of each piece of conductive pattern, which greatly simplifies the process. In addition, after pattern imprinting, the embossed groove is filled with conductive material instead of the substrate Re-etching is formed on the entire surface, which can save a lot of conductive materials, especially when using more expensive conductive materials, such as ITO, the cost savings is quite obvious.

(4) The electrode lead in the conductive pattern is a grid structure, which is convenient for scraping when filling the conductive material. The conductive material is easier to be retained and not scraped away. The agglomeration effect produces scattered silver balls and causes the lead wire of the second electrode to break.

(5) The projection of the conductive thread on the plane where the shading resin or ink is located just falls on the shading resin or ink, and the conductive thread is blocked by the shading resin or ink, which will not affect the light transmittance of the display screen. The thickness requirement does not need to be visually transparent, as long as the thickness of the junction conductive thread is smaller than the thickness of the light-shielding resin or ink frame line, it can greatly reduce the process requirements for conductive grid forming to reduce production costs.

(6) The polarizer substrate in the present invention is an organic flexible substrate, which is applied in a roll-to-roll process and is suitable for mass production.

The above-mentioned embodiments only express several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but should not be construed as limiting the patent scope of the present invention. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention should be based on the appended claims.

Claims (11)

1. A kind of 1. polarisation filtration module, it is characterised in that including：

   Optical filter module, the optical filter module include carrying substrates, shading matrix and the colourama being scattered in shading matrix Resistance, the shading matrix include the ruling formed by light screening material；And

   Polaroid module, the polaroid module include：

   Polarizer substrate material；

   The conductive layer being arranged in the polarizer substrate material, the conductive layer include the first conductive pattern and the second conductive pattern, First conductive pattern and the second conductive pattern spaced formation induced junction on the extension direction of the polarizer substrate material Structure, first conductive pattern and the second conductive pattern include conductive grid, and the conductive grid is by conductive thread interconnection Formed, the conductive thread projects to fall on the ruling of the shading matrix on the shading matrix；And

   Glue-line is protected, is coated on the conductive layer；

   First conductive pattern and the second conductive pattern are to be etched by being attached to the polarizer substrate material surface metal plating layer Obtain, first conductive pattern and the second conductive pattern are embedded at the protection glue-line close to the one of the polarizer substrate material Side；

   The conductive layer also includes conducting bridge, and the conducting bridge is located on first conductive pattern, and with being led positioned at first Electrical pattern opposite sides two the second conductive patterns electrical connection, between the conducting bridge and first conductive pattern formed with Insulating barrier；

   The conducting bridge is formed by transparent conductive material, the both ends of the conducting bridge directly with positioned at first conductive pattern two Two the second conductive patterns overlap joint of side, and each end of the conducting bridge and at least two in corresponding second conductive pattern Bar conductive thread overlaps；

   The conducting bridge is to form conductive grid by conductive thread interconnection, and the conducting bridge is provided at both ends with the first conduction Block and the second conducting block, first conducting block and the second conducting block are electrically connected two in the first conductive pattern both sides Individual second conductive pattern；The surface area of first conducting block and second conducting block is all higher than the surface of the conducting bridge Product；The sectional area of first conducting block and second conducting block is all higher than the sectional area of the conductive thread of the conducting bridge；

   First conducting block is electrically connected at least two conductive threads of the second corresponding conductive pattern, and described second is conductive Block is electrically connected at least two conductive threads of the second corresponding conductive pattern.
2. 2. polarisation filtration module according to claim 1, it is characterised in that the material of the conductive thread is metal, carbon Nanotube, graphene, organic conductive macromolecule or ITO.
3. 3. polarisation filtration module according to claim 1, it is characterised in that the line width of conductive thread is not more than the ruling Line width.
4. 4. polarisation filtration module according to claim 1, it is characterised in that the coat of metal include silver, copper, zinc, gold, At least one of nickel metal.
5. 5. polarisation filtration module according to claim 1, it is characterised in that the side row of each first conductive pattern At least two the second spaced conductive patterns are shown, second conductive pattern of every one first conductive pattern both sides is mutual Insulation.
6. 6. polarisation filtration module according to claim 1, it is characterised in that first conductive pattern and the second conductive pattern Case is designed with lead, and the lead is network or solid linear.
7. 7. polarisation filtration module according to claim 1, it is characterised in that the conducting bridge is embedded at the protection glue-line In, the conducting bridge spaced, Protection glue on the thickness direction of the protection glue-line with first conductive pattern Part of the layer between the conducting bridge and first conductive pattern forms the insulating barrier.
8. 8. polarisation filtration module according to claim 1, it is characterised in that the protection glue-line is backwards to the optical filter mould Block.
9. 9. polarisation filtration module according to claim 1, it is characterised in that described to protect glue-line towards the optical filter mould Block and it is held between the polarizer substrate material and the optical filter module.
10. 10. a kind of touch display screen, it is characterised in that including the TFT electrodes, Liquid Crystal Module, public electrode and such as stacked gradually Polarisation filtration module in claim 1-9 described in any one.
11. 11. touch display screen according to claim 10, it is characterised in that the protection glue-line of the polaroid module, One conductive pattern and the first conductive pattern are located between the polarizer substrate material and the optical filter module.