CN104516144B - The capacitance detecting device and its detection method of a kind of touch sensing - Google Patents
The capacitance detecting device and its detection method of a kind of touch sensing Download PDFInfo
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- CN104516144B CN104516144B CN201410810972.7A CN201410810972A CN104516144B CN 104516144 B CN104516144 B CN 104516144B CN 201410810972 A CN201410810972 A CN 201410810972A CN 104516144 B CN104516144 B CN 104516144B
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- ito
- ito pattern
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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
- G02F1/13338—Input devices, e.g. touch panels
-
- 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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
-
- 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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Crystallography & Structural Chemistry (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Testing Electric Properties And Detecting Electric Faults (AREA)
- Liquid Crystal (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
Abstract
The present invention provides the capacitance detecting device and its detection method of a kind of touch sensing, including touch sensing, touch sensing has row ITO pattern and row ITO pattern, the row IC being connected with row ITO pattern, and the row IC being connected with row ITO pattern, this detection means also includes being located at the liquid crystal display panel above ITO pattern, the liquid crystal display panel includes upper substrate, ITO electrode positioned at upper substrate bottom, infrabasal plate, and the liquid crystal between sandwiched upper substrate and infrabasal plate, one end of one first power supply is connected to ITO electrode, the other end of first power supply is connected to row IC；One end of one second source is connected to ITO electrode, and the other end of second source is connected to row IC.The present invention not only can ahead of time detect the particular location of ITO pattern defect after per pass ITO processing procedures terminate, and the change of every piece of area capacitance value can also directly be detected, so as to detect the uniformity of monoblock touch sensing electric capacity.
Description
Technical field
The present invention relates to a kind of capacitance detecting device and its detection method for touch sensing.
Background technology
Touch sensing (Touch Sensor) is typically all to refer to the touch-control electro-conductive glass (ITO for plating ITO conductive layer
), or touch-control conductive film (ITO Film) Glass.The common material of touch sensing (Touch Sensor) includes glass
And plastic sheeting PET, in touch technology, including resistance-type and condenser type are all to pass through ITO Glass or ITO Film
Touch-control sensing, wherein touch-control electro-conductive glass (ITO Glass), or touch-control conductive film (ITO Film) are carried out Deng conducting medium
Referred to as TIO figures, therefore be referred to as touch sensing (Touch Sensor).
The detection of existing touch sensing (Touch Sensor) is that IC energizations are given after whole processing procedures terminate, according to output
Waveform judge the position of defect.
As shown in figure 1, touch sensing (Touch Sensor) includes row ITO pattern 11, row TIO figures 12 and row ITO
The row IC 20 of the connection of the figure 11 and row IC 30 being connected with row ITO pattern 12, by leading to row IC 10 and row IC 20
Electricity, detects the sunken position of the waveform breakthrough of row ITO pattern 11 and row ITO pattern 12 in touch sensing, but the method is unfavorable for
Pinpoint the problems early, and when the pattern of touch sensing is individual layer ITO structure, it is impossible to it is accurately positioned the specific of defect appearance
Position.
The content of the invention
The detection means and detection method of the uniformity for the purpose detection monoblock touch sensing electric capacity that the present invention is carried.
The present invention provides a kind of capacitance detecting device of touch sensing, including touch sensing, and touch sensing has
Row ITO pattern and row ITO pattern, the row IC being connected with row ITO pattern and the row IC being connected with row ITO pattern, this detection dress
Putting also includes being located at the liquid crystal display panel above ITO pattern, and the liquid crystal display panel includes upper substrate, positioned at upper substrate bottom
ITO electrode, the liquid crystal between infrabasal plate and sandwiched upper substrate and infrabasal plate, one end of one first power supply is connected to ITO electricity
Pole, the other end of the first power supply are connected to row IC；One end of one second source is connected to ITO electrode, the other end of second source
It is connected to row IC.
The present invention provides a kind of capacitance detecting device of touch sensing, including touch sensing, touch sensing tool again
There are individual layer ITO pattern and the IC being connected with ITO pattern, this detection means also includes being located at the liquid crystal display above ITO pattern
Panel, the liquid crystal display panel include upper substrate, the ITO electrode positioned at upper substrate bottom, infrabasal plate and sandwiched upper substrate and
Liquid crystal between infrabasal plate, one end of a power supply is connected to ITO electrode, the other end of power supply is connected to IC.
The present invention provides a kind of detection method again, comprises the following steps：
Be powered to ITO electrode and row IC, detect the change of row ITO pattern regional capacitance, when in row ITO pattern certain
Place is defective, the optical anomaly of the row ITO pattern of liquid crystal display panel display correspondence defect；
To ITO electrode and row IC be powered, detect row ITO pattern regional capacitance change, when in row ITO pattern certain
Place is defective, the optical anomaly of the row ITO pattern of liquid crystal display panel display correspondence defect；
It is powered simultaneously to row IC and row IC, when row IC and row IC gives different voltages, when row ITO pattern and row ITO
There is foreign matter between figure, when causing row ITO pattern and the series connection of row ITO pattern, cause the full line or column voltage of fault location because of string
Connection changes, the row ITO of liquid crystal display panel display correspondence defect and the optical anomaly of row ITO pattern.
The present invention provides a kind of detection method again, comprises the following steps：
It is powered to ITO electrode and IC, the change of ITO pattern regional capacitance is detected, when somewhere has scarce in ITO pattern
Fall into, the optical anomaly of the ITO pattern of liquid crystal display panel display correspondence defect.
The present invention not only can ahead of time detect the particular location of ITO pattern defect after per pass ITO processing procedures terminate,
The change of every piece of area capacitance value can also be directly detected, so as to detect the uniformity of monoblock touch sensing electric capacity.
Brief description of the drawings
Fig. 1 show the structural representation of existing touch sensing；
Fig. 2 is the structural representation of the capacitance detecting device of touch sensing of the present invention；
The structural representation that Fig. 3 is powered for the line direction of capacitance detecting device of the present invention；
The structural representation that Fig. 4 is powered for the column direction of capacitance detecting device of the present invention；
The structural representation that Fig. 5 is powered for the row and column direction of capacitance detecting device of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is furture elucidated, it should be understood that these embodiments are merely to illustrate
The present invention rather than limitation the scope of the present invention, after the present invention has been read, those skilled in the art are each to the present invention's
The modification for planting the equivalent form of value falls within the application appended claims limited range.
Lcd technology is a kind of electro-optic conversion technology, i.e., according to the electric field level for being added in liquid crystal both sides, changes liquid crystal
Ordered state, so as to change the optical path direction by liquid crystal layer, the final light-out effect for changing liquid crystal display device.Liquid crystal
The technology of showing directly can be transformed into different size of electric signal the optical signal of different brightness, so as to be shown as pattern.From liquid crystal
The electro-optical characteristic of Display Technique is counter to be pushed away, and can be judged to be added in the electric field level of liquid crystal both sides according to the optical signals of different brightness.Profit
Use this feature, can with liquid crystal display device test touch sensing (Touch Sensor) ITO pattern defect it is specific
Position.
The structural representation of the capacitance detecting device of touch sensing of the present invention is illustrated in figure 2, by by a liquid crystal
Show that panel 1 is suspended on the top of touch sensing 2, the top of liquid crystal display panel 1 is provided with image machine (CCD) 5, and the image machine 5 connects
Device computer 6 is connect, the image machine 5 can read the data message on liquid crystal display panel 1.
Wherein, liquid crystal display panel 1 include vitreous upper substrate 11, the ITO electrode 12 positioned at the bottom of upper substrate 11, under
Substrate 14 and the discotic liquid crystal layer 13 being folded between upper substrate 11 and infrabasal plate 14, wherein infrabasal plate 14 are with insulation
The infrabasal plate of effect, the ITO pattern 21,22 of the correspondence touch sensing 1 of infrabasal plate 14.
Detection means of the present invention is by applying the first power supply 31 and second source 32, wherein one end and the liquid of the first power supply 31
The ITO electrode 12 of LCD panel 1 is connected, and the other end of the first power supply 31 is connected with the row IC 23 of touch sensing 1, and second
One end of power supply 32 is also connected with the ITO electrode 12 of liquid crystal display panel 1, the other end and the touch sensing 1 of second source 32
Row IC 24 connect, and between the first power supply 31 and row IC 22 provided with first switch 41, second source 32 with row IC 24 it
Between be provided with second switch 42.
Liquid crystal display panel 1 is used as lower electricity as ITO Top electrodes of the invention, the ITO pattern 21,22 of touch sensing 2
Pole, by being applied on the ITO electrode 12 of the upper substrate 11 in liquid crystal display panel IC corresponding with the ITO pattern of touch sensing 1
Making alive produces electric field, the state of the corresponding liquid crystal 13 in the top of ITO pattern 21,22 is changed, according to liquid crystal display panel 1
Display effect can effectively judge the ITO pattern 21,22 of touch sensing 1 with the presence or absence of abnormal and whole capacitance plate electric capacity
The uniformity of value.
This detection means detects the electricity of circuit substrate by using liquid crystal display device compared with existing touch sensing
Characteristic, more visual pattern, and do not result in without additional mechanical force the surface damage of wiring board.
In fig. 2, the infrabasal plate 14 of liquid crystal display panel 1 can slacken the electric-field strength being loaded on liquid crystal as insulating barrier
Degree.So, infrabasal plate 14 must accomplish micron-sized thickness, so thin substrate frequently touch circuit substrate be easy for it is electric
Base board weares and teares, therefore liquid crystal display panel needs to maintain a certain distance with touch sensing, and the distance is 1um to 3mm, this
The presence of individual distance can also slacken the electric-field intensity being loaded on liquid crystal.
Fig. 3 show the operating diagram that the first switch of this capacitance detecting device merges, and is given when by the first power supply 31
After row IC 23 is powered, row ITO pattern 21 in touch sensing 1, has ITO pattern and without ITO figures as the bottom electrode of liquid crystal
Charge inducing at shape is different, therefore its electric capacity is also different, can detect the change of the regional capacitance of row ITO pattern 21.
When somewhere is defective in row ITO pattern 21, then abnormal, corresponding position on liquid crystal display panel 1 occurs for the electric capacity of its defect corresponding position
Optics it is also abnormal.
Data on liquid crystal display panel 1 are transmitted to computer 6 after being caught by image machine (CCD) 5, can be accurately positioned row
The particular location of ITO pattern defect.
Fig. 4 show the operating diagram that the second switch of this capacitance detecting device merges, and is given when by second source 32
Arrange after the energizations of IC 24, row ITO pattern 22 in touch sensing 1, has ITO pattern and without ITO figures as the bottom electrode of liquid crystal
Charge inducing at shape is different, therefore its electric capacity is also different, can detect the change of the regional capacitance of row ITO pattern 22.
When somewhere is defective in row ITO pattern 22, then abnormal, corresponding position on liquid crystal display panel 1 occurs for the electric capacity of its defect corresponding position
Optics it is also abnormal.
Data on liquid crystal display panel 1 are transmitted to computer 6 after being caught by image machine (CCD) 5, can be accurately positioned row
The particular location of ITO pattern defect.
Fig. 5 show the operating diagram that the first switch and second switch of this capacitance detecting device merge, when to row
IC 23 and row IC 24 are powered simultaneously when, as needed, same voltage can be given, different voltage can also be given.When to not
With voltage when, when there is foreign matter in somewhere between row ITO pattern 21 and row ITO pattern 22, cause row ITO pattern 21 and row ITO figures
Shape 22 is connected, and may result in the full line or column voltage of fault location because series connection changes.Corresponding position charge inducing changes,
Thus electric capacity also change, and the optics of corresponding position is also abnormal on liquid crystal display panel 1.
Data on liquid crystal display panel 1 are transmitted to computer 6 after being caught by image machine (CCD) 5, can be accurately positioned row
The particular location of ITO pattern 21 and the defect of row ITO pattern 22.
The present invention not only can ahead of time detect the particular location of ITO pattern defect after per pass ITO processing procedures terminate,
The change of every piece of area capacitance value can also be directly detected, so as to detect the uniformity of monoblock touch sensing electric capacity.
When the pattern of touch sensing is individual layer ITO pattern, the method can simpler and accurate detection touch-control sensing
The particular location that the defect of device occurs.
When the pattern of touch sensing is individual layer ITO pattern, touch sensing has individual layer ITO pattern and and ITO
The IC of figure connection, this detection means also includes being located at the liquid crystal display panel above ITO pattern, and the liquid crystal display panel includes
Liquid crystal between upper substrate, the ITO electrode positioned at upper substrate bottom, infrabasal plate and sandwiched upper substrate and infrabasal plate, a power supply
One end be connected to ITO electrode, the other end of power supply is connected to IC.
During detection, after being powered by power supply to IC, ITO pattern in touch sensing, has as the bottom electrode of liquid crystal
ITO pattern is different with without the charge inducing at ITO pattern, therefore its electric capacity is also different, can detect row ITO pattern regional
The change of capacitance.When somewhere is defective in ITO pattern, then abnormal, liquid crystal display panel occurs for the electric capacity of its defect corresponding position
The optics of upper corresponding position is also abnormal.
Data on liquid crystal display panel are transmitted to computer after being caught by image machine (CCD), can be accurately positioned ITO figures
The particular location of shape defect.
Claims (7)
1. a kind of capacitance detecting device of touch sensing, including touch sensing, touch sensing have row ITO pattern and row
ITO pattern, the row IC being connected with row ITO pattern and the row IC being connected with row ITO pattern, it is characterised in that：This detection means
Also include being located at the liquid crystal display panel above ITO pattern, the liquid crystal display panel includes upper substrate, positioned at upper substrate bottom
Liquid crystal between ITO electrode, infrabasal plate and sandwiched upper substrate and infrabasal plate, one end of one first power supply is connected to ITO electricity
Pole, the other end of the first power supply are connected to row IC；One end of one second source is connected to ITO electrode, the other end of second source
It is connected to row IC；The distance between the infrabasal plate and touch sensing are 1um-3mm.
2. the capacitance detecting device of touch sensing according to claim 1, it is characterised in that：First power supply and row
First switch is provided between IC, second switch is provided between second source and row IC.
3. the capacitance detecting device of touch sensing according to claim 1, it is characterised in that：Also include reading liquid crystal
Show the image machine of the information on panel, image machine is connected with computer.
4. the capacitance detecting device of touch sensing according to claim 1, it is characterised in that：The infrabasal plate is insulation
Substrate.
5. the capacitance detecting device of touch sensing according to claim 4, it is characterised in that：The thickness of the infrabasal plate
For micron order.
6. a kind of detection method of detection means as claimed in claim 1, it is characterised in that comprise the following steps：
It is powered to ITO electrode and row IC, the change of row ITO pattern regional capacitance is detected, when there being somewhere in row ITO pattern
Defect, the optical anomaly of the row ITO pattern of liquid crystal display panel display correspondence defect；
It is powered to ITO electrode and row IC, the change of row ITO pattern regional capacitance is detected, when there being somewhere in row ITO pattern
Defect, the optical anomaly of the row ITO pattern of liquid crystal display panel display correspondence defect；
It is powered simultaneously to row IC and row IC, when row IC and row IC gives different voltages, when row ITO pattern and row ITO pattern
Between have foreign matter, when causing row ITO pattern and the row ITO pattern to connect, cause the full line or column voltage of fault location because series connection is sent out
Changing, the row ITO of liquid crystal display panel display correspondence defect and the optical anomaly of row ITO pattern.
7. detection method according to claim 6, it is characterised in that：Detection means also includes reading on liquid crystal display panel
Information image machine, image machine is connected with computer, and the optical anomaly data of the ITO pattern are caught by image machine, and
Shown in computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410810972.7A CN104516144B (en) | 2014-12-23 | 2014-12-23 | The capacitance detecting device and its detection method of a kind of touch sensing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410810972.7A CN104516144B (en) | 2014-12-23 | 2014-12-23 | The capacitance detecting device and its detection method of a kind of touch sensing |
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| Publication Number | Publication Date |
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| CN104516144A CN104516144A (en) | 2015-04-15 |
| CN104516144B true CN104516144B (en) | 2017-10-31 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106445259A (en) * | 2015-08-05 | 2017-02-22 | 南京瀚宇彩欣科技有限责任公司 | Manufacture method of touch display component and repairing equipment of touch display component |
| CN107346067A (en) * | 2016-05-06 | 2017-11-14 | 上海纪显电子科技有限公司 | Capacitance type touch-control panel detecting system and method |
| CN107346065A (en) * | 2016-05-06 | 2017-11-14 | 上海纪显电子科技有限公司 | Capacitance type touch-control panel detecting system and its detection method |
| KR102573208B1 (en) * | 2016-11-30 | 2023-08-30 | 엘지디스플레이 주식회사 | Display panel |
| TWI707257B (en) * | 2018-10-08 | 2020-10-11 | 友達光電股份有限公司 | Touch device and driving method thereof |
| CN110361870A (en) * | 2019-07-29 | 2019-10-22 | 深圳阜时科技有限公司 | A kind of optical module, transmitting unit, sensing mould group and electronic equipment |
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| CN101271211A (en) * | 2007-03-19 | 2008-09-24 | 精工爱普生株式会社 | Liquid crystal device, electronic apparatus and position detecting method |
| CN101339313A (en) * | 2007-07-03 | 2009-01-07 | 株式会社日立显示器 | Display device with touch panel |
| CN101408825A (en) * | 2008-11-12 | 2009-04-15 | 友达光电股份有限公司 | Capacitance touching control panel and detection method thereof |
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| JPH08146863A (en) * | 1994-11-21 | 1996-06-07 | Matsushita Electric Ind Co Ltd | Electronic test system |
| CN1826628A (en) * | 2003-06-20 | 2006-08-30 | 西奎公司 | Single-layer touchpad and methods of use |
| CN101271211A (en) * | 2007-03-19 | 2008-09-24 | 精工爱普生株式会社 | Liquid crystal device, electronic apparatus and position detecting method |
| CN101339313A (en) * | 2007-07-03 | 2009-01-07 | 株式会社日立显示器 | Display device with touch panel |
| CN101408825A (en) * | 2008-11-12 | 2009-04-15 | 友达光电股份有限公司 | Capacitance touching control panel and detection method thereof |
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