JP3191207U - Polarizing plate module and touch screen using polarizing plate module - Google Patents

Abstract

A polarizing plate module capable of reducing the thickness of an electronic device and a touch screen using the polarizing plate module are provided.
A polarizing plate module includes a polarizing plate substrate, an adhesive layer applied and deposited on the polarizing plate substrate, and a conductive layer embedded in the adhesive layer. . The conductive layer 230 includes a first conductive pattern 232 and a second conductive pattern 234 that are spaced apart from each other in the extending direction of the adhesive layer 220 to form a sensing structure. The polarizing plate module 200 can realize a touch operation and output polarized light.
[Selection] Figure 2

Description

  The present invention relates to the field of touch screens, and more particularly, to a polarizing plate module, a method for manufacturing a polarizing plate module, and a touch screen using the polarizing plate module.

  The touch panel is a detection device that can receive a touch input signal. The touch panel brings a fresh look to information exchange, which is a fresh and attractive information interactive device. The development of touch panel technology has generated widespread interest from domestic and foreign information media, and touch panel technology has built a high-tech industry that is booming in optoelectronics.

  At present, an electronic product having a touch control unit and a display function generally includes a display screen and a touch panel additionally provided on the display screen. However, when a touch panel is used in an electronic product to achieve human-machine interaction, it needs to be ordered and then assembled according to the size of the display screen as a separate component from the display screen. There are mainly two different ways of assembling the touch panel and the display screen, namely, frame attach and full attach. Frame attach is to attach the edge of the touch screen to the edge of the display screen. Full attach is the attachment of the entire lower surface of the touch screen to the entire upper surface of the display screen.

  The display screen is thick as an assembly module such as a polarizing plate, an optical filter, a liquid crystal module, and a TFT. At the same time, the display screen and touch panel are two separate and independent parts. When assembling an electronic product, a complex assembly process is required to assemble the display touch screen and the touch panel together. This further increases the thickness and weight of the electronic product during assembly of the touch display screen. Furthermore, another assembly process increases the probability of unwanted product generation and manufacturing costs.

  In view of the above, the present invention relates to a polarizing plate module capable of reducing the thickness of an electronic device, a manufacturing method of the polarizing plate module, and a touch screen using the polarizing plate module.

  The polarizing plate module includes a polarizing plate substrate, an adhesive layer applied and adhered to the polarizing plate substrate, and a conductive layer embedded in the adhesive layer. The conductive layer includes a first conductive pattern and a second conductive pattern that are spaced apart from each other in an extending direction of the adhesive layer to form a sensing structure.

  The touch screen includes a TFT electrode, a liquid crystal module, a common electrode, a filter module, and a polarizing plate module, which are sequentially stacked.

The manufacturing method of the polarizing plate module is
Preparing a polarizing plate substrate;
Applying and applying an adhesive layer to a polarizing plate substrate;
Embedding a conductive layer in the adhesive layer, the conductive layer including a first conductive pattern and a second conductive pattern spaced apart from each other in an extending direction of the adhesive layer to form a sensing structure .

  The polarizing plate module of the touch screen can realize a touch operation and output polarized light. With the polarizing plate module as an indispensable part of the touch screen, the touch screen can have a touch function. There is no need to assemble the touch panel on the display screen, which can help reduce the thickness of the electronic device.

  The parts shown in the drawings are not necessarily drawn to scale, but rather emphasized to clearly illustrate the principles of the present invention. The following figures provide specific details for a thorough understanding of these embodiments and a feasible description of these embodiments.

1 is a schematic view of a touch screen as an embodiment. It is a schematic sectional drawing of the polarizing plate module shown by FIG. FIG. 3 is a plan view of the conductive layer shown in FIG. 2. 2 is a partial schematic view of the touch screen shown in FIG. 1. It is a top view of the conductive wire as an embodiment. It is a top view of the conductive wire as another embodiment. It is a top view of the conductive wire as another embodiment. It is a top view of the conductive wire as another embodiment. It is the schematic of the preparation process of the conductive layer as embodiment. It is the schematic of the preparation process of the conductive layer as embodiment. It is the schematic of the preparation process of the conductive layer as embodiment. It is a schematic sectional drawing of the polarizing plate module as another embodiment. FIG. 8 is a plan view of the conductive layer shown in FIG. 7. It is a schematic sectional drawing of the polarizing plate module as another embodiment. It is process explanatory drawing of the manufacturing method of the polarizing plate module as embodiment.

  Hereinafter, exemplary embodiments of the present invention will be described. The following description provides specific details for a thorough understanding of these embodiments and a feasible description requirement for these embodiments. Those skilled in the art will appreciate that the present invention may be practiced without such details. In other instances, well-known structures and functions have not been shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

  Unless explicitly stated otherwise, "comprise" (translated as "has" or "includes"), "comprising" throughout the English specification and the claims for utility model registration "Etc." should be interpreted in a comprehensive rather than an exclusive or exhaustive sense, i.e. "including, but not limited to" (including but not limited to) It should be understood that the singular or plural word includes the plural or singular, respectively, in addition to “herein” (“herein”), “above” (“˜ The terms “below”, “below”, as well as terms of similar meaning, as used herein, refer to the present application as a whole and It is not a reference. If the utility claim registration statement refers to a list of two or more items and uses the word "or" ("or"), the word is the next interpretation of the word All of the items in the list, all of the items in the list, and any combination of the items in the list.

  Provided herein are a polarizing plate module that can reduce the thickness of an electronic device, a method of manufacturing a polarizing plate, and a touch screen using the polarizing plate. The polarizing plate module can realize a touch operation and output polarized light, and thus the touch screen can have touch and display functions by the polarizing plate module.

  Referring to FIG. 1, a lower polarizing plate 10, a TFT electrode plate 20, a liquid crystal module 30, a common electrode 40, a protective film 50, a filter module 60, and a polarizing plate module 200 in which touch screens 100 according to an embodiment are sequentially stacked. have.

  The TFT electrode plate 20 has a glass substrate 24 and a display electrode 22 provided on the glass substrate 24. The first module 60 includes a glass layer 66 and a shielding resin 62 and an optical filter 64 provided on the surface of the glass layer 66.

  It should be understood that when the backlight mounted on the touch screen 100 is polarized light, for example, OLED polarized light, only the polarizing plate module 200 is necessary, and the lower polarizing plate 10 and the protective film 50 can be omitted. .

  In the illustrated embodiment, the structures and functions of the lower polarizing plate 10, the TFT electrode plate 20, the liquid crystal module 30, the common electrode 40, the protective film 50, and the filter module 60 may be substantially the same as the products of the prior art, These are not described in detail.

  The touch screen 100 may be a direct illumination type liquid crystal display or a horizontal illumination type liquid crystal display.

  Referring to FIG. 2, the polarizing plate 200 includes a polarizing plate substrate 210, an adhesive layer 220, and a conductive layer 230 that are sequentially stacked.

  The polarizing plate substrate 210 is used to convert incident light into polarized light. In the illustrated embodiment, the polarizer substrate 210 is an organic flexible substrate. A roll-to-roll process can be used for mass production of the polarizing substrate 210.

  An adhesive layer 220 is applied to and adhered to the polarizing plate substrate 210. The adhesive layer 220 may be of a low hardness that is convenient for the patterning process.

  Referring to FIGS. 2 and 3, the conductive layer 230 is embedded in the adhesive layer 220. The conductive layer 230 includes a first conductive pattern 232 and a second conductive pattern 234 that are spaced apart from each other to form a sensing structure. The first conductive pattern 232 and the second conductive pattern 234 are insulated from each other.

  The first conductive pattern 232 and the second conductive pattern 234 have a single-layer multipoint structure, that is, at least two second conductive patterns 234 that are spaced apart from each other include each of the first conductive patterns 232. It is provided on one side. The second conductive patterns 234 provided on the opposite sides of the first conductive patterns 232 are insulated from each other. The first conductive pattern 232 and the second conductive pattern 234 include leads 35 that extend to the edge of the adhesive layer 220. The lead 35 may be a solid wire or a mesh wire.

  In the illustrated embodiment, the adhesive layer 220 defines a first groove 222 that matches the shape of the first conductive pattern 232 and a second groove 224 that matches the shape of the second conductive pattern 234 by nanoimprinting. The first conductive pattern 232 is received in the first groove 222, and the second conductive pattern 234 is received in the second groove 224. Furthermore, the thickness of the first conductive pattern 232 is equal to or less than the depth of the first groove 222, and the thickness of the second conductive pattern 234 is equal to or less than the depth of the second groove 224.

  The first conductive pattern 232 and the second conductive pattern 234 may be a conductive mesh formed by a plurality of conductive wires 34 that intersect each other. The shape of the grid cell formed by the conductive wires 34 may be regular or random. The conductive wire 34 may be formed by imprinting the adhesive layer 220 to form a groove corresponding to the shape of the conductive pattern, and then filling the groove with a conductive material. The conductive material may be selected from the group consisting of metals, carbon nanotubes, graphene, organic conductive polymers and ITO. Preferably, the conductive material is a metal (eg, nano-silver).

  In one embodiment, the conductive wires 34 may be aligned with the mesh lines of the shielding matrix 37 of the optical filter 64 of the filter module 60. In an alternative embodiment, the conductive wires 34 may not be aligned with the mesh lines of the shield matrix 37. When the conductive wires 34 are not aligned with the shield lines of the shield matrix 37, the width of the conductive wires 34 ranges from 500 nm to 5 μm in order to guarantee light transmission of the filter module 60 and further ensure color rendering of the touch screen 100. This allows the conductive wire to be visually transparent.

  Referring to FIG. 4, in one embodiment, the conductive wires 34 of the first conductive pattern 232 and the second conductive pattern 234 are aligned with the shielding resin or ink of the filter module 60, i.e., the shielding resin or ink. All the projected images of the conductive wires 34 on the plane are precisely within the shielding resin or ink. The conductive wire 34 is accurately contained in the shielding resin or ink. The conductive wire 34 is shielded by a shielding resin or ink, and thus the light transmission of the touch screen 100 is not affected. Furthermore, the width of the conductive wire 34 need not be visually transparent as long as the width of the conductive wire 34 is smaller than the width of the shielding resin or ink.

  Referring to FIG. 5A, in the first conductive pattern 232 and the second conductive pattern 234, the conductive mesh formed by the conductive wires 34 may be rectangular. Further, each grid cell of each conductive mesh is aligned with the filtering grid cell of shield matrix 37.

  Referring to FIG. 5 b, in the first conductive pattern 232 and the second conductive pattern 234, each grid cell of the conductive mesh formed by the conductive wire 34 is aligned with a plurality of filtering grid cells of the shield matrix 37. Yes.

  Referring again to FIG. 5b, in the illustrated embodiment, the conductive wire 34 of the conductive mesh is a straight line. 5c and 5d, in the illustrated embodiment, the conductive wire 34 is a curved line, i.e., the shape of the grid cell of the conductive mesh is as long as the conductive wire 34 is shielded by shielding resin or ink. It may be regular or irregular.

  The conductive layer 230 may be of any conventional touch detection type, such as a single layer multipoint structure, a double layer multipoint structure, or the like.

Referring to FIGS. 6a to 6c, the conductive layer 230 has a single-layer multipoint structure. Referring to FIG. 10, the manufacturing method of the polarizing plate module 200 as one embodiment is as follows.
-Preparing a polarizing plate substrate (S110);
Applying and adhering an adhesive layer to the polarizer substrate (S120); and embedding a conductive layer in the adhesive layer (S130), the conductive layer forming a sensing structure It includes a first conductive pattern and a second conductive pattern that are spaced apart from each other in the extending direction of the adhesive layer.

  Specifically, the adhesive layer 220 is imprinted by the imprint mold 23, and the imprint mold conforms to the shapes of the first conductive pattern 232 and the second conductive pattern 234, and then The first groove 222 and the second groove 224 are obtained by curing. The imprint mold 23 is shaped as a comb. The adhesive may be UV glue. The first groove 222 and the second groove 224 are filled with a conductive material, and then the conductive material is cured to form a first conductive pattern 232 and a second conductive pattern 234, respectively. The first conductive pattern 232 and the second conductive pattern 234 are spaced apart from each other to form a conductive layer 230 having a sensing structure.

  Referring to FIGS. 7 and 8, in an alternative embodiment, the conductive layer 230 further includes a conductive bridge 236 that crosses over the first conductive pattern 232. The conductive bridge 236 and the first conductive pattern 232 include an insulating layer 238 provided therebetween. The conductive bridge 236 electrically connects the two second conductive patterns 234 disposed on both sides of the first conductive pattern 232 to each other. In the illustrated embodiment, the conductive bridge 236 is embedded in the adhesive layer 220. The insulating layer 238 is a glue layer.

  Referring to FIG. 9, the conductive bridge 236 is made of a transparent conductive material, and this transparent conductive material may help to improve the light transmission of the polarizer module 200. In the illustrated embodiment, the conductive bridge 236 is formed by a plurality of conductive wires 34 intersecting each other. Further, the conductive bridge 236 includes a first conductive block 36 and a second conductive block 36 'at both ends thereof. The surface area of the first conductive block 36 and the second conductive block 36 'is larger than the surface area of the conductive bridge 236, and thus the contact surface between the conductive bridge 236 and the conductive pattern 234 is very wide. Can help ensure the effectiveness of the electrical connection. Further, the first conductive block 36 is electrically coupled to at least two conductive wires 34 of the corresponding second conductive pattern 234, and the second conductive block 36 ′ is at least of the corresponding second conductive pattern 234. It is electrically coupled to two conductive wires 34 (even if one of the conductive wires 34 is disconnected, the other may still be connected).

  The conductive bridge 236 may also be formed by imprinting. For example, the mesh-like conductive bridge 236 can be formed by imprinting in one step. In an alternative embodiment, the conductive bridge 236 is formed by first forming a plug hole in the conductive block by lithographic exposure, then forming a mesh groove by imprinting, and finally, in the mesh groove. The mesh-like conductive bridge 236 and the conductive block may be formed by filling a conductive material.

  The present invention also has the following advantages.

(1) The polarizing plate module of the present invention can perform a touch operation and simultaneously output polarized light. There is no need to assemble the touch screen on the display panel, which can help reduce the thickness of the electronic device, save material, and significantly reduce assembly costs.

(2) The conductive pattern of the present invention is formed by a plurality of meshes, and the visual transparency can be obtained by controlling the width and density of mesh lines. The conductive pattern material can be extended from conventional transparent materials to various conductive materials. If the conductive pattern is made of metal, the resistance can be greatly reduced and thus the power consumption of the touch screen can be further reduced.

  (3) The conductive pattern can be formed in one step by pattern etching (film formation-exposure-development-etching). This greatly simplifies the manufacturing procedure, since all conductive patterns can be formed by imprinting in one step. Furthermore, compared to the method of etching the entire conductive layer after forming the conductive layer on the surface of the substrate, the conductive pattern is formed by filling the groove with conductive material after pattern imprinting, thereby There is a significant savings in conductive material. In particular, if expensive conductive materials, such as ITO, are used, the cost is greatly saved.

  (4) The lead of the conductive pattern is mesh-like, and the conductive material tends to stay in the groove when the conductive material is filled. Further, when nano silver is sintered, the phenomenon of electrode lead breakage due to the spread of silver balls caused by the agglomeration effect is avoided.

  While the descriptions of the embodiments are specific and detailed, it should be understood that these descriptions are not to be construed as limiting the invention. Therefore, the protection scope of the present invention described in the claims for utility model registration shall be determined based on the description in the claims for utility model registration.

DESCRIPTION OF SYMBOLS 10 Lower polarizing plate 20 TFT electrode plate 22 Display electrode 24 Glass substrate 30 Liquid crystal module 36 1st conductive block 36 '2nd conductive block 40 Common electrode 50 Protective film 60 Filter module 62 Shield area 64 Optical filter 66 Glass layer 100 Touch screen 200 Polarizing plate module 210 Polarizing plate substrate 220 Adhesive layer 222 First groove 224 Second groove 230 Conductive layer 232 First conductive pattern 234 Second conductive pattern 236 Conductive bridge 238 Insulating layer

Claims (15)

A polarizing plate module,
A polarizing plate substrate;
An adhesive layer applied and deposited on the polarizing plate substrate;
A conductive layer embedded in the adhesive layer, wherein the conductive layer is spaced apart from each other in the extension direction of the adhesive layer to form a sensing structure; A polarizing plate module including a conductive pattern.   The adhesive layer defines a first groove that matches the shape of the first conductive pattern and a second groove that matches the shape of the second conductive pattern, and the first conductive pattern includes the first conductive pattern. The polarizing plate module according to claim 1, wherein the second conductive pattern is received in the second groove, and the second conductive pattern is received in the second groove.   The polarized light according to claim 2, wherein a thickness of the first conductive pattern is equal to or less than a depth of the first groove, and a thickness of the second conductive pattern is equal to or less than a depth of the second groove. Board module.   The polarizing plate module according to claim 1, wherein the first conductive pattern and the second conductive pattern are conductive meshes formed by a plurality of conductive wires intersecting each other.   The polarizing plate module according to claim 4, wherein the conductive wire is made of metal.   The polarizing plate module according to claim 4, wherein a width of the conductive wire is 500 nm to 5 μm.   And a conductive bridge connecting the two second conductive patterns disposed on opposite sides of the first conductive pattern to each other, and an insulating layer is provided between the conductive bridge and the first conductive pattern. The polarizing plate module according to claim 4.   The polarizing plate module according to claim 7, wherein the conductive bridge is made of a transparent conductive material.   The conductive bridge is embedded in the adhesive layer, and a part of the adhesive layer located between the conductive bridge and the first conductive pattern forms the insulating layer. Polarizing plate module.   The conductive bridge has a first conductive block and a second conductive block located at opposite ends of the conductive bridge, and the first conductive block and the second conductive block are the first conductive block. The polarizing plate module according to claim 7, wherein the polarizing plate module is electrically coupled to each of the two second conductive patterns provided on opposite sides of the pattern.   The first conductive block is electrically coupled to at least two conductive wires of the corresponding second conductive pattern, and the second conductive block is at least two conductive of the corresponding second conductive pattern. The polarizing plate module according to claim 10, wherein the polarizing plate module is electrically coupled to the wire.   At least two conductive patterns spaced apart from each other are provided on one side of each of the first conductive patterns, and the second conductive patterns provided on both sides of each of the first conductive patterns are: The polarizing plate module according to claim 1, which are insulated from each other.   The polarizing plate module according to claim 1, wherein the polarizing plate substrate is an organic flexible substrate.   A touch screen comprising a TFT electrode, a liquid crystal module, a common electrode, a filter module, and the polarizing plate module according to claim 1, which are sequentially stacked.   The touch screen according to claim 14, wherein the adhesive layer, the first conductive pattern, and the second conductive pattern are sandwiched between the polarizing plate substrate and the filter module.