CN107346065A - Capacitance type touch-control panel detecting system and its detection method - Google Patents
Capacitance type touch-control panel detecting system and its detection method Download PDFInfo
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- CN107346065A CN107346065A CN201610296965.9A CN201610296965A CN107346065A CN 107346065 A CN107346065 A CN 107346065A CN 201610296965 A CN201610296965 A CN 201610296965A CN 107346065 A CN107346065 A CN 107346065A
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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
- G02F1/1306—Details
- G02F1/1309—Repairing; Testing
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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
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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
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
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- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- Mathematical Physics (AREA)
- Liquid Crystal (AREA)
- Position Input By Displaying (AREA)
Abstract
The invention provides a kind of capacitance type touch-control panel detecting system and its detection method, belong to electric circuit inspection technical field, a kind of capacitance type touch-control panel detecting system is provided, for detecting the sense wire of capacitance type touch-control panel, the capacitance type touch-control panel has both sides, vertical electric field is produced by applying voltage to the sense wire, including：Vertical-type liquid crystal display device, the side of the capacitance type touch-control panel is arranged on, for showing the electric circuit inspection pattern of the capacitance type touch-control panel；Backlight, the opposite side of the capacitance type touch-control panel is arranged on, for providing uniform backlight through the capacitance type touch-control panel for the liquid crystal display device.The invention also discloses the detection method of the detecting system, can be used for the sense wire line defct for efficiently intuitively detecting capacitance type touch-control panel.
Description
Technical field
The present invention relates to detection field, more particularly to a kind of capacitance type touch-control panel detecting system and its detection method.
Background technology
Touch-control sensing line (Touch sensings) typically refers to the touch-control electro-conductive glass (ITO Glass) for plating ITO conductive layer, or touch-control conductive film (ITO Film).The sense wire of capacitance type touch-control panel generally requires etches various patterns on the ito layer.Fig. 1 is the planar structure schematic diagram of capacitance type touch-control panel sense wire of the present invention.As shown in figure 1, touch-control sensing line includes row sense wire 201, row sense wire 203, the drive circuit 206 that voltage signal is provided with row sensing is sensed to row, and connect the wire 205 of drive circuit 206 and sense wire.Row sense wire 201 is made up of multiple rows sensing PAD 202, and row sense wire 203 senses PAD204 by multiple row and formed.Realized and be electrically connected by the bridging conductor of same layer conductor or different layers between row sensing PAD.It is electrically connected between row sensing PAD by the bridging conductor of different layers or with layer conductor realization.
The sense wire detection of existing capacitance type touch-control panel is after the completion of whole manufacture crafts, is powered to IC, the position of defect is judged according to the waveform of output.By being powered to drive circuit 204, the sunken position of the waveform breakthrough of touch-control sensing line is detected, but the method is unfavorable for pinpointing the problems early, and when the pattern of touch sensing is individual layer ITO structure, the particular location of defect appearance can not be accurately positioned.
Capacitance touching control is also known as electrostatic capacitive touch-control, is after finger touch panel, by catching the electric charge to be flowed away from panel surface, the method for determining position of touch.Capacitance touching control technology is to cause electrostatic capacitance change using the touch-control of the electrical bodies such as finger, and the X-axis that capacitance variations place occurs and Y-axis coordinate are calculated by sensing circuit to determine position of touch.
A kind of common capacitance type touch-control panel is that the X/Y axles sensing electrode itself on contact panel forms parasitic capacitance (Parasitic capacitance), abbreviation Cp between ground potential (GND) respectively self-capacitance contact panel.In touch control display terminal, self-capacitance Cp ground potential is generally PCB or metal frame.Because self-capacitance is the electric capacity of sensing electrode over the ground, as shown in Fig. 2 during with a finger touch-sensing electrode, due to body earthing potential, the sensing electrode of self-capacitance finger electric capacity Cf in parallel, Cf are added in screen body capacitance, increase the total capacitance in sensing electrode.
Every sensing electrode line of self-capacitance, which all connects, connects excitation/sample circuit, spontaneous pumping signal and certainly receipts sampled signal, and the front and rear capacitance change of touch-control generation is detected by detecting direct-to-ground capacitance.During touch control detection, control IC applies high-frequency ac voltage in the sensing electrode of horizontal X-axis and longitudinal Y-axis respectively, while detects its electric current.Due to the presence of self-capacitance, an electric field changed with pumping signal will be produced between induction electrode and ground.When touch-control occurs, the crossover location of the sensing electrode of current anomaly is exactly the position of touch of finger in the sensing electrode and Y-axis of current anomaly (occurring rising crest) in X-axis.The scan mode of self-capacitance, X-axis and Y direction are projected to respectively equivalent to the touch point on touch panel, then calculates coordinate in X-axis and Y direction respectively, is finally combined into the coordinate of touch point.
Self-capacitance Cp is parallel plate capacitor over the ground, possesses larger signal intensity.Also, the finger electric capacity Cf that touch-control is superimposed when occurring is also parallel plate capacitor, the spontaneous pumping signal of sense wire and the capacitance change received certainly between sampled signal are bigger.So self-capacitance touch technology can detect finger sensing farther out, detecting distance scope is up to 20mm.When there is finger to rest on screen or screen above when, the sense wire nearest apart from finger will be activated.
For capacitance type touch-control panel, it is necessary to carry out functional test during manufacturing, functional test is broadly divided into sensing test, FOG tests and three parts of finished product test.
Sensing test is the first procedure for having to do after sensing supplied materials cutting, and the result of detection is directly connected to the rear end production of whole capacitance type touch-control panel.Because the sensing of capacitance type touch-control panel is made up of row sense wire and row sense wire square crossing, each passage is made up of designed ITO electric bridges, each passage sensed above can be measured with universal meter, so as to judge its open circuit and short-circuit conditions.But the efficiency so done is extremely low, it can not just go to implement the demand produced in enormous quantities at all, therefore, sensing measurement jig is just particularly important.
FOG tests are after sensing function test and appearance test are qualified, and the key test of second of progress, it will directly influence fitting below.FOG tests are mainly carried out by computer and related supporting test software, analyze the break-make short circuit all situations of CTP semi-finished product after FOG.
Finished product test is last one of the Product checking done before finished product storage, is specifically similar to FOG and tests, whether function is all gone well detection capacitance type touch-control panel finished product.
Whether the function that the Function detection essence of capacitance type touch-control panel seeks to detect sense wire is normal.By taking first of test of capacitance type touch-control panel test as an example, do that the producer of capacitance type touch-control panel testing jig is very more at present, most of above principle is all to analyze the functional reliability of the sensing by the impedance of each passage of test sensing.But many problems can have been found when really using, this kind of testing jig is regular to be judged by accident, and certified products are judged into defective work, or can not judge to open a way, or even regular generation testing jig broken string or erroneous judgement, influences to produce.
The content of the invention
In view of this, above-mentioned or other problems be present aiming at prior art in the purpose of the present invention, a kind of capacitance type touch-control panel detecting system and its method are provided, it efficiently can intuitively detect capacitance type touch-control panel using vertical electric field type liquid crystal display device, have the advantages of detection method is simple, accuracy of detection is high, cost is low.
In order to reach above-mentioned or other purposes, one aspect of the present invention proposes capacitance type touch-control panel detecting system, and for detecting the sense wire of capacitance type touch-control panel, the capacitance type touch-control panel has both sides, and horizontal component of electric field is produced by applying voltage to the sense wire, including：Vertical-type liquid crystal display device, the side of the capacitance type touch-control panel is arranged on, for showing the electric circuit inspection pattern of the capacitance type touch-control panel；Backlight, the opposite side of the capacitance type touch-control panel is arranged on, for providing uniform backlight through the capacitance type touch-control panel for the liquid crystal display device.
Further, the vertical electric field type liquid crystal display device, includes successively from the bottom to top：First substrate, first alignment film, liquid crystal layer, the second alignment film, common electrode layer, second substrate, wherein, the first substrate and the second substrate are opposed toward each other, liquid crystal layer, it is located between the first substrate and the second substrate, liquid crystal molecule rotates printing opacity in vertical direction when applying vertical electric field.
Further, the capacitance type touch-control panel comprises at least：One transparency carrier, a plurality of first sense wire and a plurality of second sense wire are disposed with the transparency carrier, vertical electric field is produced by applying voltage between the common electrode layer on a plurality of first and second sense wire and the vertical-type liquid crystal display device of the capacitance type touch-control panel to the liquid crystal layer both sides, makes the liquid crystal display device display circuit detection pattern.
Further, in addition to the first polaroid and the second polaroid, it is arranged respectively on the outside of opposite opposed first substrate and the second substrate.
Further, in addition to the first polaroid and the second polaroid, first polaroid are configured on the light source outgoing side of the backlight, and second polaroid is configured on the outside of the second substrate.
In order to reach above-mentioned or other purposes, another aspect of the present invention proposes a kind of detection method, and for detecting capacitance type touch-control panel, the capacitance type touch-control panel has both sides, and is disposed with sense wire on the capacitance type touch-control panel, including：Vertical electric field type liquid crystal display device is provided, the side of the capacitance type touch-control panel is arranged on, for showing the electric circuit inspection pattern of the capacitance type touch-control panel；Backlight is provided, is arranged on the opposite side of the capacitance type touch-control panel, for providing backlight through the capacitance type touch-control panel for the liquid crystal display device.
Further, the vertical electric field type liquid crystal display device, is configured successively from the bottom to top：First substrate, first alignment film, liquid crystal layer, the second alignment film, common electrode layer, second substrate, wherein, the first substrate and the second substrate are opposed toward each other, liquid crystal layer, it is located between the first substrate and the second substrate, liquid crystal molecule rotates printing opacity in vertical direction when applying vertical electric field.
Further, the capacitance type touch-control panel comprises at least：One transparency carrier, a plurality of first sense wire and a plurality of second sense wire are disposed with the transparency carrier；When not applying voltage between the sense wire and the public electrode, the liquid crystal display device shows completely black picture or complete white picture；When applying voltage between the sense wire and the public electrode, liquid crystal display device display circuit detection picture；The detection picture and standard picture are faced than judging whether the circuit pattern of the capacitance type touch-control panel is normal.
Further, applying voltage to first sense wire and second sense wire includes：A plurality of first sense wire applies the first level voltage simultaneously, and a plurality of second sense wire applies second electrical level voltage simultaneously, and the public electrode voltages apply first level voltage or second electrical level voltage.
Further, applying voltage to first sense wire and second sense wire includes：The public electrode wire applies the first level voltage, applies the first level voltage with the sense wire of second electrical level voltage scanning first or the public electrode wire successively, successively with the sense wire of second electrical level voltage scanning second.
Lower section of the invention by the way that the transparent circuit substrate that can produce vertical electric field to be positioned over to the liquid crystal display devices such as VA, TN, OCB, driving liquid crystal molecule rotate, and realize the display of bright dark picture.By the display picture for observing liquid crystal cell, it can be determined that whether the line function of transparent circuit board is normal, so that it is determined that whether transparent circuit board can normal work.
Brief description of the drawings
Fig. 1 is the planar structure schematic diagram of capacitance type touch-control panel sense wire of the present invention；
Fig. 2 produces the structural representation of vertical electric field between capacitance type touch-control panel sense wire of the present invention and finger；
Fig. 3 show the structural representation of capacitance type touch-control panel detection means of the present invention；
Fig. 4 A, 4B are the operation principle structural representation of capacitance type touch-control panel detection means of the present invention；
Fig. 5 is vertical electric field type liquid crystal display device structural representation of the present invention；
Fig. 6 A-6D are the relational structure schematic diagram between the first alignment direction of the present invention, the second alignment direction, the first polarizing axis P1, the second polarizing axis P2；
Fig. 7 is the condenser type rhombus sense wire structural representation of another embodiment of the present invention contact panel；
When Fig. 8 A are no application voltage on sense wire of the present invention, liquid crystal display device display picture；
Fig. 8 B are the detection picture that liquid crystal display device is shown when applying voltage on sense wire of the present invention；
Fig. 9 A are the contact panel floor map to break occur on the second sense wire of the invention；
Fig. 9 B are that the contact panel in Fig. 9 A of the present invention detects picture view；
Figure 10 A are the planar structure schematic diagram for the contact panel that short circuit occurs for the first sense wire and the second sense wire of the invention；
Figure 10 B are that the contact panel in Figure 10 A of the present invention detects picture view；
Figure 11 A, 11B are the sense wire structural representation of yet another embodiment of the invention contact panel；
Figure 12 is that another embodiment of the present invention capacitance type touch-control panel is strip sense wire structural representation；
Figure 13 is the standard picture view of detection means of the present invention detection；
Figure 14 A are that contact panel of the present invention the planar structure schematic diagram to break occurs on the first sense wire；
Figure 14 B are that the contact panel in Figure 14 A of the present invention detects picture view；
Figure 15 A are the planar structure schematic diagram that short circuit occurs for the first sense wire and the second sense wire on contact panel of the present invention；
Figure 15 B are that the contact panel in Figure 15 A of the present invention detects picture view.
Figure 16 is that another embodiment of the present invention capacitance type touch-control panel is square sense wire structural representation；
Figure 17 is the standard picture view of detection means of the present invention detection；
Figure 18 A are the planar structure schematic diagram of square sense wire deletion condition occur on contact panel of the present invention；
Figure 18 B are that the contact panel in Figure 18 A of the present invention detects picture view；
Figure 19 A are the planar structure schematic diagram that short circuit occurs for neighboring blocks shape sense wire on contact panel of the present invention；
Figure 19 B are that the contact panel in Figure 19 A of the present invention detects picture view.
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 only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, modification of the those skilled in the art to the various equivalent form of values of the present invention falls within the application appended claims limited range.
Operation principle of the invention according to capacitance type touch-control panel, propose a kind of identification work for traditional pure electrical detection work of capacitance type touch-control panel Function detection being converted to optical imagery, can the test of compatible sense wire, FOG tests and three kinds of functional tests of finished product test, so as to greatly improve the detection efficiency of capacitance type touch-control panel.Self-capacitance forms electric field between finger and sensing, corresponding liquid crystal display mode has TN (Twisted Nematic, twisted-nematic) display pattern, VA (Vertical Alignment, vertical orientation) display pattern, OCB (Optically Compensated Birefringence, optical compensation curved arrangement) display pattern, etc..
The concept of TN (Twisted Nematic, twisted nematic) display pattern comes from two parts：First, nematic (Nematic) liquid crystal is injected in display screen；Second, one 90 ° distortion (Twisted) alignment structure is formed in display screen.This distortion alignment structure can make nematic crystal in the presence of external voltage, be exported after the linear polarization of injection is reversed.This unique phenomena of TN display patterns is referred to as optically-active characteristic.TN optical activity and birefringence are simultaneously deposited, when the refractive index anisotropy that optical activity shows as TN liquid crystal slowly changes, the polarizing axis concomitant rotation of liquid crystal.
TN display patterns are under the conditions of without applied voltage, after natural light enters the Polarizer of TFT side, are formed in parallel with the linear polarization of long axis of liquid crystal molecule.By 90 ° of distortion orientation of liquid crystal layer, the linear polarization of shape deflection in 90 °.Because the polarizing axis of CF lateral deviation tabula rasas and the polarizing axis of TFT side Polarizer are in 90 ° of vertical distributions, 90 ° of linear polarizations deflected project after passing through CF lateral deviation tabula rasas.So TN display patterns are without applied voltage, under normal circumstances, backlight transmission and mistake are white, are commonly called as " normal white mode ".
If TN display patterns both sides above and below liquid crystal apply longitudinal voliage, in addition to the liquid crystal near upper and lower both sides alignment film, most of liquid crystal all vertical distributions in liquid crystal layer.Through TFT side Polarizer linear polarization zero deflection by liquid crystal layer, parallel to the polarizing axis of CF lateral deviation tabula rasas.Linear polarization is absorbed, and dull thread projects, in black state.
This feature of respective performance is all realized by transverse electric field using TN liquid crystal panels and capacitance type touch-control panel, pixel electrode that can be using the sense wire of capacitance type touch-control panel or sensing PAD as TN liquid crystal panels, it is opposed with the public electrode in TN liquid crystal panels, apply the display effect that TN liquid crystal panels can be controlled after certain voltage.By the display picture for observing TN liquid crystal panels, it can be determined that whether the sensing function of capacitance type touch-control panel is normal, so that it is determined that whether capacitance plate can normal work.
When detecting capacitance type touch-control panel sense wire using liquid crystal display, the liquid crystal display modes such as TN, VA, OCB can be selected.Preferably, using liquid crystal material used in the TN liquid crystal display modes of maturation.If not otherwise specified, liquid crystal described below is all TN liquid crystal.
Fig. 3 show the structural representation of capacitance type touch-control panel detection means of the present invention.As shown in figure 3, LCDs 100 is a liquid crystal cell for there was only public electrode, the liquid crystal given by capacitance type touch-control panel 200 in LCDs 100 provides a longitudinal electric field.Control is applied to the voltage of the sensing (sense wire or sensing PAD) in contact panel 200, thus it is possible to vary the mesomorphic state of display screen 100, so as to change the brightness of display screen 100.The light source shown for display screen 100 is provided by backlight 300.
Display screen 100 is using TN liquid crystal 103.Traditional TN liquid crystal display modes are to apply voltage between the pixel electrode in array base palte and the public electrode in color membrane substrates, liquid crystal molecule is rotated in the longitudinal direction of vertical substrate, cause birefringence to control the transit dose of light.In the present invention, the public electrode 104 of the sensing 202 of capacitance type touch-control panel 200 and display screen 100, forms longitudinal electric field in liquid crystal layer, the rotary state of the liquid crystal 103 in control display screen 100.
The light of the display of display screen 100 comes from backlight 300, and the original light source of backlight 300 carrys out self-luminous body combination 301.Illuminator combination 301 can be PDP (Plasma Display Panel,Plasma panel),FED(Field emission displays,FED),OLED(Organic Light-Emitting Diode,Organic Electricity laser display) etc. active light emitting display panel,Can also be LED (Light-Emitting Diode,Light emitting diode) spot light or CCFL (Cold Cathode Fluorescent Lamp,Cathode fluorescent tube) the regularly arranged formation of line source directly-down light source,It can also be the area source formed after LED point light source or CCFL line sources import in light guide plate side through light guide plate processing.The light that illuminator combination 301 is sent, can be white light or monochromatic light.Preferably, illuminator combination 301 is the white area source formed after LED point light source imports in light guide plate side through light guide plate processing.The light that illuminator combination 301 is sent switchs to linearly polarized light after optical film combination 302 by the first Polarizer 303.The effect of optical film combination 302 is that the light that illuminator 301 is sent is adjusted to uniform area source, and specific blooming piece includes diffusion sheet, prismatic lens etc..
The polaroid set-up mode of detecting system disclosed by the invention is not limited to the arrangement shown in Fig. 3, it is the first polaroid 303 and the second polaroid 105 that its arrangement, which can also be adjusted, is arranged respectively at opposite opposed first substrate 101 and the outside of the second substrate 102.
The size of display screen 100 is more than the distribution of contact panel sense wire, can disposably complete detection of the display screen 100 to contact panel 200.In detection, the sense wire side of contact panel 200 contacts with the Polarizer 101 of display screen 100.The operation principle of the detecting system of capacitance type touch-control panel is as shown in Figure 4.
As shown in Figure 4 A, under the conditions of without applied voltage, linearly polarized light from backlight 300, through after transparent capacitance type touch-control panel 200, into display screen 100, its polarization direction is rotated layer by layer by TN liquid crystal 103, through being in (ellipse) rotatory polarization state after liquid crystal layer.After these polarised lights for being changed polarization direction reach the second Polarizer 105, a part therein is absorbed by the second Polarizer 105, and a remaining part passes through the second Polarizer 105.At this moment, IPS liquid crystal panels are shown as white.
As shown in Figure 4 B, after voltage difference is applied between the sensing 202 of capacitance type touch-control panel 200 and the public electrode 104 of display screen 100, longitudinal electric field is formed, driving TN liquid crystal 103 rotates, and liquid crystal molecule arranges along direction of an electric field.Linearly polarized light from backlight 300, through after transparent capacitance type touch-control panel 200, into display screen 100, it is formed in parallel with the linear polarization of long axis of liquid crystal molecule.Because linearly polarized light will not change the polarization state of linearly polarized light parallel to the major axis of liquid crystal molecule, the linearly polarized light injects the second Polarizer 105 with same state.Because the linearly polarized light is vertical with the polarizing axis of the second Polarizer 105, polarised light of relocating just is absorbed by the second Polarizer 105, and no light can pass through the second Polarizer 105, and display is in black state.
The core of display screen 100 is the liquid crystal cell that first substrate 101 is bonded with second substrate 102, as shown in Figure 5.The material of first substrate 101 and second substrate 102 can be the transparent materials such as glass, plastics.In first substrate 101 the first alignment film 107 is coated with close to the side of liquid crystal 103；In second substrate 102 the second alignment film 108 is coated with close to the side of liquid crystal 103.The effect of alignment film is to allow liquid crystal 103 to be arranged along certain direction.Between first substrate 101 and second substrate 102, liquid crystal 103 is sealed with sealant 106.The current potential of public electrode 104 on second substrate 102 is introduced by extraction wire 109.
The alignment direction of first alignment film 107 is set as D1, parallel with the polarizing axis P1 of the first Polarizer 303.The alignment direction of second alignment film 108 is set as D2, parallel with the polarizing axis P2 of the second Polarizer 105.Preferably, polarizing axis P1 and polarizing axis P2 for perpendicular relation, so, the alignment direction D2 perpendicular quadratures of the alignment direction D1 of the first alignment film 107 and two alignment films 108.The alignment direction of alignment film, the polarizing axis of Polarizer, and relation between display screen can be relations as shown in Figure 6A.The alignment direction D2 of the alignment direction D1 of first alignment film 107 and the second alignment film 108 can also be the relation as shown in Fig. 6 B-6D.
Present invention also offers the detection method of capacitance type touch control sensing detecting system, can intactly reproduce the Electric Field Distribution state on contact panel.By way of electro-optic conversion, the Electric Field Distribution that contact panel senses is converted to the picture of bright dark different gray-scale distributions.By observing picture, the picture seen and standard picture are contrasted, if unanimously as qualified, if inconsistent is exactly unqualified.
Fig. 7 is that the rhombus that capacitance type touch-control panel generally uses senses PAD structures, is the first sense wire 202 parallel to X-axis, is the second sense wire 203 parallel to Y-axis, passes through SiO in the first sense wire 202 and the intersection region of the second sense wire 2032Or the transparent insulating layer such as SiNx isolation.
, can be with the dispaly state of control display screen by controlling the voltage of the first sense wire 202 and the second sense wire 203 based on the sensing PAD structures shown in Fig. 7, Polarizer polarizing axis relation and alignment film alignment direction relation.
As shown in Figure 8 A, when on the first sense wire and the second sense wire without voltage is applied, a complete white picture is shown in display screen.
As shown in Figure 8 B, apply 10V voltages to all second sense wires, the picture being made up of multiple regular patterns is shown when applying 0V voltages to the public electrode on display device, on display screen 100.Wherein, the region for showing white is exactly region corresponding to the second sense wire.If applying 10V voltages to all first sense wires, when applying 0V voltages to the public electrode on display device, the region that white is shown on display screen 100 is exactly region corresponding to the first sense wire.
Fig. 8 is normal contact panel picture shown in detecting system provided by the invention.When actually detected, if the contact panel existing defects detected, the afunction of fault location sense wire can be directly reacted on display screen 100.
Fig. 9 A are one piece and occur the contact panel to break on the second sense wire.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all second sense wires, the public electrode to display device applies 10V voltages, and the picture shown by display screen 100 is as shown in Figure 9 B.There is abnormal display pattern on the display location at face broken string.If broken on the first sense wire, apply 10V voltages to all first sense wires, when the public electrode to display device applies 10V voltages, abnormal display pattern occurs on the display location at face broken string in display screen 100.
Picture shown in Fig. 9 B and the picture shown in Fig. 8 B are contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Fig. 9 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
Figure 10 A are the contact panel that short circuit occurs for one piece of first sense wire and the second sense wire.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all second sense wires, the first sense wire does not apply voltage, and the public electrode to display device applies 0V voltages, and the picture shown by display screen 100 is as shown in Figure 10 B.There is abnormal display pattern on the display location at face short circuit.
Picture shown in Figure 10 B and the picture shown in Fig. 8 B are contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Figure 10 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
Similar with the sensing structure shown in Fig. 7 also senses PAD just like the triangle shown in Figure 11 A, 11B.Rhombus sensing PAD either shown in Fig. 7, or the triangle sensing PAD shown in Figure 11 A, 11B, the transverse electric field formed between first sense wire and the second sense wire is all in the tortuous distribution of "eight" shape, so the sensing detection method of this kind of contact panel is similar.Alignment film alignment direction including display screen 100, the first Polarizer are all similar with the polarisation direction of principal axis of the second Polarizer.
Capacitance type touch-control panel shown in Figure 12 uses the sensing PAD of strip, it is the first sense wire 202 parallel to X-axis, it is the second sense wire 203 parallel to Y-axis, is isolated in the first sense wire 202 with the intersection region of the second sense wire 203 by transparent insulating layers such as SiO2 or SiNx.For the sensing cable architecture shown in Figure 12, corresponding first Polarizer polarizing axis P1 and the second Polarizer polarizing axis P2, and the relation between the first alignment film and the alignment direction D of the second alignment film are as shown in figure 12.
, can be with the dispaly state of control display screen by controlling the voltage of the first sense wire 202 and the second sense wire 203 based on the sensing PAD structures shown in Figure 12, Polarizer polarizing axis relation and alignment film alignment direction relation.
As shown in figure 13,10V voltages are applied to all second sense wires, the first sense wire does not apply voltage, and when the public electrode to display device applies 0V voltages, the picture being made up of multiple regular patterns is shown on display screen 100.Figure 13 is normal contact panel picture shown in detecting system provided by the invention.When actually detected, if the contact panel existing defects detected, the afunction of fault location sense wire can be directly reacted on display screen 100.
Figure 14 A are one piece and occur the contact panel to break on the first sense wire.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all second sense wires, the first sense wire does not apply voltage, and the public electrode to display device applies 0V voltages, and the picture shown by display screen 100 is as shown in Figure 14B.There is abnormal display pattern on the display location at face broken string.
Picture shown in picture and Figure 13 shown in Figure 14 B is contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Figure 14 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
Figure 15 A are the contact panel that short circuit occurs with central second sense wire for one piece of sense wire of center first.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all second sense wires, the first sense wire does not apply voltage, and the public electrode to display device applies 0V voltages, and the picture shown by display screen 100 is as shown in fig. 15b.There is abnormal display pattern on the display location at face short circuit.
Picture shown in picture and Figure 13 shown in Figure 15 B is contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Figure 15 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
Capacitance type touch-control panel shown in Figure 16 uses the sensing PAD of square, only the first sense wire 202.For the sensing cable architecture shown in Figure 16, corresponding first Polarizer polarizing axis P1 and the second Polarizer polarizing axis P2, and the relation between the first alignment film and the alignment direction D of the second alignment film are as shown in figure 16.
, can be with the dispaly state of control display screen by controlling the voltage of the first sense wire 202 based on the sensing PAD structures shown in Figure 16, Polarizer polarizing axis relation and alignment film alignment direction relation.
As shown in figure 17, apply 10V voltages to all sense wires, when the public electrode to display device applies 0V voltages, the picture being made up of multiple regular patterns is shown on display screen 100.Figure 17 is normal contact panel picture shown in detecting system provided by the invention.When actually detected, if the contact panel existing defects detected, the afunction of fault location sense wire can be directly reacted on display screen 100.
Figure 18 A are one piece and the contact panel for sensing PAD missings occur.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all sense wires, the public electrode to display device applies 0V voltages, and the picture shown by display screen 100 is as shown in figure 18b.There is abnormal display pattern on the display location at face sensing PAD missings.
Picture shown in picture and Figure 17 shown in Figure 18 B is contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Figure 18 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
Figure 19 A are the contact panel that short circuit occurs for one piece of adjacent sensing PAD.The contact panel is positioned in detecting system provided by the invention, applies 10V voltages to all sense wires, the public electrode to display device applies 0V voltages, and the picture shown by display screen 100 is as shown in Figure 19 B.There is abnormal display pattern on the display location at face short circuit.
Picture shown in picture and Figure 17 shown in Figure 19 B is contrasted, two pictures are inconsistent, it can be determined that the contact panel detected is unqualified.By comparing picture, region abnormal in Figure 19 B is found out, it may be determined that the touch-control sensing line existing defects of relevant position.So using detecting system provided by the invention and detection method, it not only can quickly judge that whether contact panel is qualified, can also specifically find out the position of defect.
One embodiment of the invention additionally provides voltage drive method during detection, and all row sensings are unified to apply an identical voltage, and all row sensing uniformly applies another identical voltage.Such as all unified application 0V voltages of row sensing, all row sensing is unified to apply 10V voltages, and public electrode applies 0V.This detection method, the picture that display screen 100 is shown correspond to the position display informal voucher line of row sensing, the position display black streaking of respective column sensing.
Another embodiment of the present invention additionally provides voltage drive method during detection, successively scan line sensing and row sensing.For example applying 10V voltages scan line sense wire successively, public electrode applies 0V.Or applying 10V voltages scan columns sense wire successively, public electrode applies 0V.This detection method, the corresponding each sensing of display screen 100 show a black streaking.
The undeclared part being related in the present invention is same as the prior art or is realized using prior art.It should be understood that：To those of ordinary skill in the art; under the premise without departing from the principles of the invention; every any simple modification, change and equivalent structure substantially made according to the technology of the present invention to above example changes, and belongs in the protection domain of technical solution of the present invention.
Claims (10)
1. a kind of capacitance type touch-control panel detecting system, for detecting the sense wire of capacitance type touch-control panel, the electricity
Appearance formula contact panel has both sides, and vertical electric field is produced by applying voltage to the sense wire, including：
Vertical-type liquid crystal display device, the side of the capacitance type touch-control panel is arranged on, for showing the capacitive touch
Control the electric circuit inspection pattern of panel；
Backlight, the opposite side of the capacitance type touch-control panel is arranged on, for being through the capacitance type touch-control panel
The liquid crystal display device provides uniform backlight.
2. detecting system according to claim 1, it is characterised in that the vertical electric field type liquid crystal display device,
Include successively from the bottom to top：First substrate, the first alignment film, liquid crystal layer, the second alignment film, common electrical
Pole layer, second substrate, wherein, the first substrate and the second substrate are opposed toward each other, liquid crystal layer,
It is located between the first substrate and the second substrate, liquid crystal molecule is in vertical direction when applying vertical electric field
Upper rotation, light quantity of the regulation through display device.
3. detecting system according to claim 2, it is characterised in that the capacitance type touch-control panel comprises at least：
One transparency carrier, a plurality of sense wire is disposed with the transparency carrier, passes through the electricity to the liquid crystal layer both sides
Applied between common electrode layer on a plurality of sense wire of appearance formula contact panel and the vertical-type liquid crystal display device
Making alive produces vertical electric field, makes the liquid crystal display device display circuit detection pattern.
4. detecting system according to claim 2, it is characterised in that also inclined including the first polaroid and second
Mating plate, it is arranged respectively on the outside of opposite opposed first substrate and the second substrate.
5. detecting system according to claim 2, it is characterised in that also inclined including the first polaroid and second
Mating plate, first polaroid are configured on the light source outgoing side of the backlight, second polaroid configuration
On the outside of the second substrate.
6. a kind of detection method, for detecting capacitance type touch-control panel, the capacitance type touch-control panel has a both sides, and
Sense wire is disposed with the capacitance type touch-control panel, including：
Vertical electric field type liquid crystal display device is provided, the side of the capacitance type touch-control panel is arranged on, for showing
The electric circuit inspection pattern of the capacitance type touch-control panel；
Backlight is provided, is arranged on the opposite side of the capacitance type touch-control panel, for passing through the capacitance touching control face
Plate provides backlight for the liquid crystal display device.
7. detection capacitance type touch-control panel according to claim 6, it is characterised in that the vertical electric field type liquid
LCD, configure successively from the bottom to top：First substrate, the first alignment film, liquid crystal layer, second matches somebody with somebody
To film, common electrode layer, second substrate, wherein, the first substrate and the second substrate are right toward each other
Put, liquid crystal layer, be located between the first substrate and the second substrate, liquid crystal molecule when applying vertical electric field
Rotate in vertical direction, light quantity of the regulation through display device.
8. detection method according to claim 7, it is characterised in that the capacitance type touch-control panel comprises at least：
One transparency carrier, a plurality of first sense wire and a plurality of second sense wire are disposed with the transparency carrier；
When not applying voltage between the sense wire and the public electrode, the liquid crystal display device shows completely black picture
Or complete white picture；
When applying voltage between the sense wire and the public electrode, liquid crystal display device display circuit detection picture
Face；
The detection picture and standard picture are faced than judging whether the circuit pattern of the capacitance type touch-control panel is normal.
9. detection method according to claim 8, it is characterised in that
Applying voltage to first sense wire and second sense wire includes：A plurality of first sense wire applies simultaneously
First level voltage, a plurality of second sense wire apply second electrical level voltage simultaneously, and the public electrode voltages apply
First level voltage or second electrical level voltage.
10. detection method according to claim 8, it is characterised in that to first sense wire and this
Two sense wires, which apply voltage, to be included：
The public electrode wire applies the first level voltage, successively with the sense wire of second electrical level voltage scanning first or
The public electrode wire applies the first level voltage, successively with the sense wire of second electrical level voltage scanning second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610296965.9A CN107346065A (en) | 2016-05-06 | 2016-05-06 | Capacitance type touch-control panel detecting system and its detection method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610296965.9A CN107346065A (en) | 2016-05-06 | 2016-05-06 | Capacitance type touch-control panel detecting system and its detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110728935A (en) * | 2019-09-29 | 2020-01-24 | 昆山国显光电有限公司 | Detection method and detection device for display panel |
| CN113421508A (en) * | 2021-06-28 | 2021-09-21 | 武汉华星光电半导体显示技术有限公司 | Display panel detection system |
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| CN104516144A (en) * | 2014-12-23 | 2015-04-15 | 南京中电熊猫液晶显示科技有限公司 | Touch sensor capacitance detection device and detection method thereof |
| US20150227252A1 (en) * | 2011-04-01 | 2015-08-13 | Artem Ivanov | Touch-sensitive screen |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150227252A1 (en) * | 2011-04-01 | 2015-08-13 | Artem Ivanov | Touch-sensitive screen |
| CN104516144A (en) * | 2014-12-23 | 2015-04-15 | 南京中电熊猫液晶显示科技有限公司 | Touch sensor capacitance detection device and detection method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110728935A (en) * | 2019-09-29 | 2020-01-24 | 昆山国显光电有限公司 | Detection method and detection device for display panel |
| CN113421508A (en) * | 2021-06-28 | 2021-09-21 | 武汉华星光电半导体显示技术有限公司 | Display panel detection system |
| CN113421508B (en) * | 2021-06-28 | 2022-05-31 | 武汉华星光电半导体显示技术有限公司 | Display panel detection system |
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