CN111240074A - Touch screen - Google Patents
Touch screen Download PDFInfo
- Publication number
- CN111240074A CN111240074A CN202010040483.3A CN202010040483A CN111240074A CN 111240074 A CN111240074 A CN 111240074A CN 202010040483 A CN202010040483 A CN 202010040483A CN 111240074 A CN111240074 A CN 111240074A
- Authority
- CN
- China
- Prior art keywords
- polarizer
- polaroid
- touch screen
- liquid crystal
- lower edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
Abstract
The invention discloses a touch screen which comprises a liquid crystal panel, a flexible circuit board, a polaroid assembly and conductive silver adhesive, wherein the polaroid assembly and the conductive silver adhesive are arranged on the upper surface of a color filter of the liquid crystal panel; the conductive silver adhesive is attached to the lower edge of the polaroid along the width direction of the liquid crystal panel, extends and is in contact with the section of the lower edge of the polaroid; the cross section of the lower edge of the polaroid is one of a vertically cut nonlinear shape, a non-vertically cut linear shape and a non-vertically cut nonlinear shape. The invention increases the contact area of the silver paste and the pressure-sensitive adhesive on the section of the polaroid and improves the electrostatic discharge capacity.
Description
Technical Field
The invention relates to the field of liquid crystal display, in particular to a touch screen.
Background
In the current cell product, antistatic particles are widely added in the pressure-sensitive adhesive of the polarizer on the CF side of the color film substrate (compared with the conventional polarizer, the polarizer is a low-resistance polarizer with the impedance of 10^8 to 10^10 omega/□). And the static electricity is released by conducting the TFT through one or two pad points on the step and coating a silver paste on the section of the low-resistance polaroid. However, the edge contact between the silver paste coated in this way and the polarizer depends on the straightness high uniformity and accuracy of the silver paste coating, and if not, the silver paste is too thin, the paste is broken, and the like, so that the electrostatic discharge is affected, and the performance and the display effect of the product are affected.
Disclosure of Invention
In order to solve the technical problems, the invention provides the touch screen which can increase the contact area between the silver paste and the pressure-sensitive adhesive on the section of the polaroid and improve the electrostatic discharge capacity.
The technical scheme provided by the invention is as follows:
the invention discloses a touch screen which comprises a liquid crystal panel, a flexible circuit board, a polaroid assembly and conductive silver adhesive, wherein the polaroid assembly and the conductive silver adhesive are arranged on the upper surface of a color filter of the liquid crystal panel; the conductive silver adhesive is attached to the lower edge of the polaroid along the width direction of the liquid crystal panel, extends and is in contact with the section of the lower edge of the polaroid; the cross section of the lower edge of the polaroid is one of a vertically cut nonlinear shape, a non-vertically cut linear shape and a non-vertically cut nonlinear shape.
Preferably, the cross section of the lower edge of the polarizer is a folding line which is vertically cut.
Preferably, the cross section of the lower edge of the polarizer is one of a square wave shape, a trapezoid shape and a wave shape which are vertically cut.
Preferably, the conductive silver paste includes two first paste sections and one second paste section, and the two first paste sections are respectively connected with a first electrode frame and a second electrode frame on a thin film transistor of the liquid crystal panel.
Preferably, each first glue segment is perpendicular to the second glue segment.
Preferably, the polarizer assembly further includes a polarizer protective film attached to an upper surface of the polarizer.
Preferably, the conductive silver adhesive covers the edge of the color filter, the edge of the pressure-sensitive adhesive, the edge of the polarizer and the edge of the polarizer protective film.
Compared with the prior art, the invention increases the contact area of the silver paste and the section pressure-sensitive adhesive of the polaroid by changing the cutting shape of the edge of the polaroid contacted with the silver paste, namely the section shape outline of the lower edge of the polaroid, improves the electrostatic discharge capacity, can allow larger coating deviation (position deviation and adhesive width deviation) of the silver paste and reduces the difficulty of the processing procedure.
Drawings
The present invention will be further described in the following detailed description of preferred embodiments, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic view of an overall structure of a touch screen according to the present invention;
FIG. 2a is a top view of a polarizer of a touch panel according to an embodiment of the present invention;
FIG. 2b is a partial enlarged view of the polarizer of FIG. 2 a;
FIGS. 3a-3c are schematic diagrams of three cross-sectional shapes of polarizers in another embodiment of a touch panel according to the invention;
FIG. 4a is a cross-sectional view of a lower edge of a conventional polarizer;
FIG. 4b is a cross-sectional view of the lower edge of a polarizer according to another embodiment of the present invention;
fig. 5 is a schematic overall structure diagram of a touch screen according to another embodiment of the present invention.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
Referring to fig. 1, a touch screen provided by the present invention will now be described.
The invention discloses a touch screen, which comprises a liquid crystal panel 1, a flexible circuit board 4 (FPC for short), a Polarizer assembly 2 and conductive silver adhesive 3, wherein the Polarizer assembly 2 is arranged on the upper surface of a Color Filter 11 (CF for short) of the liquid crystal panel 1, the Polarizer assembly 2 comprises Pressure Sensitive Adhesive (PSA) attached to the upper surface of the Color Filter 11 and a Polarizer (POLARIZER) attached to the upper surface of the PSA, the conductive silver adhesive 3 is electrically connected with a corresponding electrode frame on a thin film transistor 12 of the liquid crystal panel 1, and one end, far away from the Polarizer, of the thin film transistor 12 is electrically connected with the flexible circuit board 4; the conductive silver adhesive 3 is attached to the lower edge of the polaroid in the width direction of the liquid crystal panel 1, extends and is in contact with the section of the lower edge of the polaroid, and the section of the lower edge of the polaroid is one of vertically cut nonlinear shape, non-vertically cut linear shape and non-vertically cut nonlinear shape.
Compared with the prior art, the invention provides the touch screen, static electricity on the surface of the touch screen is transferred to the thin film transistor 12 through the conductive silver adhesive 3, and then the static electricity is led into the ground GND of the flexible circuit board 4 through the electrical connection between the thin film transistor 12 and the flexible circuit board 4; conductive silver glue 3 laminates the cross-section of polaroid lower limb, and the cross-section of polaroid lower limb is the non-linear of cutting perpendicularly, the straight line of non-perpendicular cutting, one kind in the non-linear of non-perpendicular cutting, conductive silver glue 3 and polaroid sub-assembly 2's area of contact has been increased, polaroid sub-assembly 2 and thin film transistor 12's connection has been guaranteed, accelerate the release of static, make the static on the touch-sensitive screen realize releasing completely, can not cause the static accumulation, avoid static to cause the damage to the touch-sensitive screen, thereby improve the antistatic effect of touch-sensitive screen.
The polaroid assembly 2 is attached to the upper surface of the liquid crystal panel 1, so that the polaroid plays a role in filtering light and improves the display effect of the touch screen, and anti-static particles are added into the pressure-sensitive adhesive, so that the surface resistance of the pressure-sensitive adhesive reaches 10^8-10^9 omega, and the pressure-sensitive adhesive has conductivity, so that the surface of the liquid crystal panel 1 and the pressure-sensitive adhesive can be conducted with each other, and the static release is accelerated.
Preferably, the polarizer assembly 2 further includes a polarizer protective film attached to an upper surface of the polarizer 22.
Preferably, the conductive silver adhesive 3 covers the edge of the color filter 11, the edge of the pressure-sensitive adhesive 21, the edge of the polarizer 22 and the edge of the polarizer protective film.
Specifically, the conductive silver paste 3 is arranged on the In cell touch screen In a coating manner, so that the processing is facilitated.
Several embodiments of the invention are described below in terms of several different cuts of the lower edge section of the polarizer.
The first embodiment is as follows:
as shown in fig. 2a to 2b, the cut shape of the edge of the polarizer contacting with the silver paste is changed, and the shape contour of the lower edge of the polarizer is changed from a straight line of vertical cutting to a broken line of vertical cutting, as shown in fig. 2a and 2 b. As can be seen from FIG. 2b, the contact area between the silver paste and the pressure-sensitive adhesive on the section of the polarizer is increased, and the electrostatic discharge capability is improved. Compared with the prior art, larger silver paste coating deviation (position deviation and glue width deviation) can be allowed. In particular, with conventional methods, the coating tolerance for better contact of the edges of the edge polarizer on silver paste coating is very limited; with the present invention, it can be seen from fig. 2b that the coating tolerance can be effectively increased.
Example two:
as shown in fig. 3a to 3c, the cutting shape of the edge of the polarizer contacting with the silver paste is changed, and the shape profile of the lower edge of the polarizer is changed from a straight line for vertical cutting to a square wave shape, a trapezoid shape and a wave shape for vertical cutting, so that the effects of increasing the contact area of the silver paste and the pressure-sensitive adhesive on the section of the polarizer and improving the electrostatic discharge capacity can be achieved; meanwhile, larger coating deviation (position deviation and glue width deviation) of the silver paste can be allowed.
Example three:
as shown in fig. 3a to 3b, the cutting mode of the polarizer edge contacting with the silver paste is changed, the shape contour of the lower edge of the polarizer is changed from a straight line of vertical cutting to a straight line of non-vertical cutting (inclined at a certain angle and 0 to 90 °), the shape contour of the lower edge of the polarizer shown in fig. 3a is a straight line of vertical cutting, and the shape contour of the lower edge of the polarizer shown in fig. 3b is a straight line of non-vertical cutting (inclined at a certain angle and 0 to 90 °), so that the effects of increasing the contact area of the silver paste and the pressure-sensitive adhesive on the section of the polarizer and improving the electrostatic discharge capability can be achieved, and meanwhile, larger silver paste coating deviation (position deviation and adhesive width deviation) can be allowed.
Preferably, a preferable scheme is obtained by improving the above scheme, and as shown in fig. 5, a touch screen includes a liquid crystal panel 1, a flexible circuit board 4 (not shown in the figure), a polarizer assembly 2 disposed on an upper surface of a color filter 11 (not shown in the figure) of the liquid crystal panel 1, and a conductive silver adhesive 3, where the polarizer assembly 2 includes a pressure sensitive adhesive attached to the upper surface of the color filter 11 and a polarizer attached to the upper surface of the pressure sensitive adhesive, the conductive silver adhesive includes two first adhesive sections 31 and one second adhesive section 32, the two first adhesive sections 31 are respectively connected to a first electrode frame 121 and a second electrode frame 122 on a thin film transistor 12 of the liquid crystal panel, and one end of the thin film transistor 12, which is far away from the polarizer, is electrically connected to the flexible circuit board 4; the second glue section of the conductive silver glue 3 is attached to the lower edge of the polaroid in the width direction of the liquid crystal panel 1, extends and is in contact with the section of the lower edge of the polaroid, and each first glue section is perpendicular to the second glue section. The cross section of the lower edge of the polaroid is one of a vertically cut nonlinear shape, a non-vertically cut linear shape and a non-vertically cut nonlinear shape.
The basic idea of the scheme of the invention can be expanded to more embodiments, and is particularly explained as follows:
1. the invention is not limited to the profiles described above, but also includes other profiles not mentioned: a vertically cut non-linear shape, or a non-vertically cut non-linear shape.
2. The invention is not limited to coating one silver adhesive to conduct the pad points on the thin film transistor and the pressure-sensitive adhesive in the polaroid, and can also coat more than one silver adhesive (with width smaller than one) to conduct the pad points on the thin film transistor and the pressure-sensitive adhesive in the polaroid.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (7)
1. A touch screen comprises a liquid crystal panel, a flexible circuit board, a polarizer assembly and conductive silver adhesive, wherein the polarizer assembly is arranged on the upper surface of a color filter of the liquid crystal panel and comprises a pressure sensitive adhesive attached to the upper surface of the color filter and a polarizer attached to the upper surface of the pressure sensitive adhesive; the conductive silver adhesive is electrically connected with a corresponding electrode frame on a thin film transistor of the liquid crystal panel, and one end of the thin film transistor, which is far away from the polaroid, is electrically connected with the flexible circuit board; the conductive silver adhesive is attached to the lower edge of the polaroid along the width direction of the liquid crystal panel, extends and is in contact with the section of the lower edge of the polaroid; the cross section of the lower edge of the polaroid is one of a vertically cut nonlinear shape, a non-vertically cut linear shape and a non-vertically cut nonlinear shape.
2. The touch screen of claim 1, wherein the cross section of the lower edge of the polarizer is a fold line cut perpendicularly.
3. The touch screen of claim 1, wherein the cross-section of the lower edge of the polarizer is one of a square wave, a trapezoid, and a wave that are vertically cut.
4. The touch screen of claim 1, wherein the conductive silver paste comprises two first paste segments and one second paste segment, and the two first paste segments are respectively connected with the first electrode frame and the second electrode frame of the thin film transistor of the liquid crystal panel.
5. The touch screen of claim 4 wherein each of the first glue segments is perpendicular to the second glue segments.
6. The touch screen of claim 1, wherein: the polarizer assembly further comprises a polarizer protective film attached to the upper surface of the polarizer.
7. The touch screen of claim 6, wherein: the conductive silver adhesive covers the edge of the color filter, the edge of the pressure-sensitive adhesive, the edge of the polarizer and the edge of the polarizer protective film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010040483.3A CN111240074A (en) | 2020-01-15 | 2020-01-15 | Touch screen |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010040483.3A CN111240074A (en) | 2020-01-15 | 2020-01-15 | Touch screen |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111240074A true CN111240074A (en) | 2020-06-05 |
Family
ID=70864041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010040483.3A Pending CN111240074A (en) | 2020-01-15 | 2020-01-15 | Touch screen |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111240074A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766732A (en) * | 2020-07-30 | 2020-10-13 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111930263A (en) * | 2020-09-14 | 2020-11-13 | 武汉华星光电技术有限公司 | Touch display panel and touch display device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116599A (en) * | 2015-09-16 | 2015-12-02 | 友达光电股份有限公司 | Thin film transistor liquid crystal display |
| CN207937736U (en) * | 2018-03-26 | 2018-10-02 | 张家港康得新光电材料有限公司 | A kind of display base plate, display panel and display device |
| CN209357029U (en) * | 2018-12-04 | 2019-09-06 | 深圳市骏达光电股份有限公司 | In cell touch screen |
-
2020
- 2020-01-15 CN CN202010040483.3A patent/CN111240074A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105116599A (en) * | 2015-09-16 | 2015-12-02 | 友达光电股份有限公司 | Thin film transistor liquid crystal display |
| CN207937736U (en) * | 2018-03-26 | 2018-10-02 | 张家港康得新光电材料有限公司 | A kind of display base plate, display panel and display device |
| CN209357029U (en) * | 2018-12-04 | 2019-09-06 | 深圳市骏达光电股份有限公司 | In cell touch screen |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111766732A (en) * | 2020-07-30 | 2020-10-13 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN111930263A (en) * | 2020-09-14 | 2020-11-13 | 武汉华星光电技术有限公司 | Touch display panel and touch display device |
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| Date | Code | Title | Description |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200903 Address after: No.7 Tianyou Road, Qixia District, Nanjing City, Jiangsu Province Applicant after: NANJING CEC PANDA FPD TECHNOLOGY Co.,Ltd. Address before: Nanjing Crystal Valley Road in Qixia District of Nanjing City Tianyou 210033 Jiangsu province No. 7 Applicant before: NANJING CEC PANDA FPD TECHNOLOGY Co.,Ltd. Applicant before: NANJING CEC PANDA LCD TECHNOLOGY Co.,Ltd. Applicant before: NANJING HUADONG ELECTRONICS INFORMATION & TECHNOLOGY Co.,Ltd. |
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| TA01 | Transfer of patent application right | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200605 |
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| WD01 | Invention patent application deemed withdrawn after publication |