CN107346067A - Capacitance type touch-control panel detecting system and method - Google Patents
Capacitance type touch-control panel detecting system and method Download PDFInfo
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- CN107346067A CN107346067A CN201610297113.1A CN201610297113A CN107346067A CN 107346067 A CN107346067 A CN 107346067A CN 201610297113 A CN201610297113 A CN 201610297113A CN 107346067 A CN107346067 A CN 107346067A
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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)
- Position Input By Displaying (AREA)
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Abstract
The invention discloses a kind of capacitance type touch-control panel detecting system and detection method, belong to electric circuit inspection technical field, the present invention provides a kind of capacitance type touch-control panel detecting system, for detecting the sense wire of capacitance type touch-control panel, the capacitance type touch-control panel has both sides, horizontal component of electric field is produced by applying voltage to the sense wire, including：Horizontal electric field LCD device, the side of the capacitance type touch-control panel is arranged on, for showing detection pattern；Backlight, the opposite side of the capacitance type touch-control panel is arranged on, for providing backlight through the capacitance type touch-control panel for the liquid crystal display device.The present invention also provides the detection method of the detecting system, can be used for the sensing line defect 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 method.
Background technology
Touch-control sensing line (Touch sensor) 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 connects 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 PAD 204 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.
The electric current that electrostatic capacitance flows through human body is very faint, different from depilation clothing when caused electrostatic.As shown in Fig. 2 (a), after drive circuit 206 applies certain voltage signal to row sense wire 201 and row sense wire 203, a horizontal component of electric field can be formed by being expert between sensing PAD 202 and row sensing PAD 204.As shown in Fig. 2 (b), when finger contacts contact panel, it can couple to form a finger electric capacity Cf between finger and the sensing electrode on contact panel, while there is also a bulky capacitor Cb for the human body between finger and ground.For the sensing electrode on contact panel, Cf and Cb are two series capacitances.Because body capacitance Cb size is at least higher by an order of magnitude than finger electric capacity Cf, on passage of the sensing electrode by finger to ground, finger electric capacity Cf plays dominating roles.Due to finger electric capacity Cf presence, the horizontal component of electric field between row sensing PAD 202 and row sensing PAD 204 is changed, and the particular location of finger touch is assured that by detecting this variable quantity.
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 (Film On Glass) 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
This is 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 method are provided, it efficiently can intuitively detect capacitance type touch-control panel using horizontal electric field LCD 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 a kind of 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, horizontal component of electric field is produced by applying voltage to the sense wire, including：Horizontal electric field LCD device, the side of the capacitance type touch-control panel is arranged on, for showing detection pattern；Backlight, the opposite side of the capacitance type touch-control panel is arranged on, for providing backlight through the capacitance type touch-control panel for the liquid crystal display device.
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, by applying voltage, horizontal component of electric field is formed between first sense wire and the second sense wire.
Further, the horizontal electric field LCD device includes：First substrate and second substrate, opposed toward each other, liquid crystal layer, it is located between the first substrate and the second substrate, liquid crystal molecule rotates horizontally printing opacity when applying horizontal component of electric field；First alignment film and the second alignment film, it is arranged respectively at opposite opposed first substrate and the inner surface of the second substrate.
Further, in addition to the first polaroid and the second polaroid, opposite opposed first substrate and the outside of the second substrate are arranged respectively at.
Further, in addition to the first polaroid and the second polaroid, first polaroid are configured on the side of the light source exit direction of the backlight, and second polaroid is configured in 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 capacitance type touch-control panel detection method, and for detecting the sense wire of capacitance type touch-control panel, the capacitance type touch-control panel has both sides, horizontal component of electric field is produced by applying voltage to the sense wire, including：Horizontal electric field LCD device is provided, the side of the capacitance type touch-control panel is arranged on, for showing detection pattern；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 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 to first sense wire and second sense wire, the liquid crystal display device shows completely black picture or complete white picture；When applying voltage to first sense wire and second sense wire, liquid crystal display device display detection picture；By the detection picture and standard picture face than, it can be determined that whether the circuit pattern of the transparent circuit substrate 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.
Further, applying voltage to first sense wire and second sense wire includes：A plurality of first sense wire applies the first level voltage simultaneously, applies the first level voltage simultaneously with the sense wire of second electrical level voltage scanning second or a plurality of second sense wire successively, successively with the sense wire of second electrical level voltage scanning first.
Further, applying voltage to first sense wire and second sense wire includes：1st article first sense wire applies the first level voltage, successively with the sense wire of second electrical level voltage scanning second；After the second sense wire end of scan, the sense wire of nth bar first applies the first level voltage, and uses the sense wire of second electrical level voltage scanning second successively, wherein, n is the natural number more than or equal to 2；After the second sense wire end of scan, the last item first sense wire applies the first level voltage, and uses the sense wire of second electrical level voltage scanning second successively.
Compared with prior art, the present invention has advantages below：
The present invention is rotated by the way that the capacitance type touch-control panel that can produce horizontal component of electric field to be positioned over to the lower sections of IPS either liquid crystal display devices such as FFS or blue phase, driving liquid crystal molecule, realizes 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 (a), 2 (b) produce horizontal component of electric field structural representation between capacitance type touch-control panel sense wire of the present invention；
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 horizontal electric field LCD device structural representation of the present invention；
Fig. 6 A are structural representation under one embodiment of the invention sense wire working condition；
Fig. 6 B are structural representation under further embodiment of this invention sense wire working condition；
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 that short-circuit contact panel occurs for the sense wire of figure first of the present invention and the second sense wire；
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 second 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.
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.
In the prior art, there is IPS (In-Plane Switching) lcd technology using horizontal component of electric field work.IPS liquid crystal display panels include：Down polaroid, array base palte, color membrane substrates, upper polaroid, the sandwiched IPS liquid crystal between array base palte and color membrane substrates, the voltage of driving IPS liquid crystal work are provided by pixel electrode and public electrode.
After backlight as natural light passes through down polaroid, rectilinearly polarized light is converted to.When between pixel electrode and public electrode without voltage difference is applied, IPS liquid crystal does not rotate, and rectilinearly polarized light is directly through liquid crystal and color membrane substrates.Due to reaching the polarised light of upper polaroid, it is polarized, and defence line is orthogonal with the polarisation direction of principal axis of upper polaroid, so polarised light is all absorbed, no light can pass through upper polaroid, and IPS liquid crystal panels are shown as black.
After voltage difference is applied between pixel electrode and public electrode, form horizontal component of electric field, driving IPS liquid crystal rotates, through down polaroid after the rectilinearly polarized light that is formed, its polarization direction is changed by liquid crystal layer.After these polarised lights for being changed polarization direction reach upper polaroid, a part therein is absorbed by upper polaroid, and a remaining part passes through upper polaroid.At this moment, IPS liquid crystal panels are shown as white.
The characteristics of present invention realizes respective performance with reference to IPS liquid crystal panels and capacitance type touch-control panel by horizontal component of electric field, using pixel electrode and public electrode of the row sense wire of capacitance type touch-control panel with row sense wire as IPS liquid crystal panels, driving row sense wire controls the display effect of IPS liquid crystal panels with row sense wire.By the display picture for observing IPS liquid crystal panels, it can be determined that whether the row sense wire of capacitance type touch-control panel and row sense wire function are normal, so that it is determined that whether capacitance plate can normal work.
The essence of capacitance touching control is the horizontal component of electric field formed between row sense wire and row sense wire, under the interference of the conductors such as finger, judges the particular location of touch-control generation by detecting interference position.So when detecting capacitance type touch-control panel sense wire using liquid crystal display, the liquid crystal display modes such as IPS, blue phase are selected.Preferably, using liquid crystal material used in the IPS liquid crystal display modes of maturation.Wherein, FFS (Fringe Field Switching) is and the same kind of liquid crystal display modes of IPS.If not otherwise specified, liquid crystal described below is all IPS 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, horizontal electric field LCD device 100 is a liquid crystal cell without functional electrode, the liquid crystal given by capacitance type touch-control panel 200 in liquid crystal display device 100 provides horizontal component of electric field.Control is applied to the voltage of the row sense wire and row sense wire in contact panel 200, thus it is possible to vary the mesomorphic state of liquid crystal display device 100, so as to change the brightness of liquid crystal display device 100.The light source shown for liquid crystal display device 100 is provided by backlight 300.
Liquid crystal display device 100 is the liquid crystal molecule of Homogenize orientations the characteristics of IPS display patterns in the face parallel to first substrate 101 and second substrate 102 using IPS liquid crystal 103.All the time in plane, liquid crystal, which rotates, only need to overcome coefficient of elasticity K22 for the rotation of IPS liquid crystal molecules.
Traditional IPS liquid crystal display modes are to apply voltage between the pixel electrode and public electrode of array base palte, liquid crystal molecule is rotated in face, cause birefringence to control the transit dose of light.Pixel electrode and public electrode design are in the same side, to form plane electric fields.In the present invention, the first sense wire 202 and the second sense wire 203 of capacitance type touch-control panel 200 are all disposed within the side of 100 first substrate of liquid crystal display device 101, planar horizontal electric field is formed in liquid crystal layer, controls the rotary state of the liquid crystal 103 in liquid crystal display device 100.
The light of the display of liquid crystal display device 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 liquid crystal display device 100 is more than the distribution of contact panel sense wire, can disposably complete detection of the liquid crystal display device 100 to contact panel 200.In detection, the sense wire side of contact panel 200 contacts with the Polarizer 101 of liquid crystal display device 100.The operation principle of the detecting system of capacitance type touch-control panel is as shown in Fig. 4 A, 4B.
As shown in Figure 4 A, under the conditions of without applied voltage, the linearly polarized light from backlight 300, through after transparent capacitance type touch-control panel 200, into liquid crystal display device 100, it is formed in parallel with the linear polarization of liquid crystal molecule short axle.Because linearly polarized light will not change the polarization state of linearly polarized light parallel to the short axle 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.
As shown in Figure 4 B, after voltage difference is applied between the first electrode 202 and second electrode 203 of capacitance type touch-control panel 200, horizontal component of electric field is formed, driving IPS liquid crystal 105 rotates, and liquid crystal molecule arranges along direction of an electric field, deviates the straight trip direction of Polarizer.Linearly polarized light from backlight 300, through after transparent capacitance type touch-control panel 200, into liquid crystal display device 100, its polarization direction is changed by liquid crystal layer, in (ellipse) rotatory polarization state.After these polarised lights for being changed polarization direction reach upper polaroid, a part therein is absorbed by upper polaroid, and a remaining part passes through upper polaroid.At this moment, IPS liquid crystal panels are shown as white.
Fig. 5 is horizontal electric field LCD device structural representation of the present invention, as shown in figure 5, the present invention provides a kind of horizontal electric field LCD device 100, including：The liquid crystal cell that first substrate 101 is bonded with second substrate 102, wherein, 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.In some occasions, electricity is caused to disturb, it is necessary to set layer of transparent conducting film (not shown) close to the side of the second Polarizer 105 in second substrate 102 to shield external electrical field to the liquid crystal 103 in liquid crystal cell.In some occasions, in order to simplify system, it is necessary to which the second Polarizer 105 is affixed directly to the outside (not shown) of second substrate 102.
First alignment film 107 is identical with the alignment direction of the second alignment film 108, is set as D, and alignment direction D is parallel with the polarizing axis P1 of the first Polarizer 303.The polarizing axis P1 of first Polarizer can be perpendicular relation or parallel relation with the polarizing axis P2 of the second Polarizer.Preferably, polarizing axis P1 and polarizing axis P2 for perpendicular relation.
Relation between the alignment direction of alignment film, the polarizing axis of Polarizer, and capacitance type touch-control panel sensing wire shaped is as shown in Figure 6.
Fig. 6 A give the first sense wire 202 of capacitance type touch-control panel 200 and the second sense wire 203 is the liquid crystal working condition under the one-domain structure of parallel distribution.A horizontal component of electric field is formed between the first sense wire 202 and the second sense wire 203 of parallel distribution, the alignment direction D of the first alignment film 107 and the second alignment film 108 is formed by modes such as friction or ultraviolet lights, determines the initial orientation angle ψ of liquid crystal 1030.The alignment direction D of alignment film is parallel with the polarizing axis P1 of the first Polarizer 303, the polarizing axis P2 perpendicular quadratures with the second Polarizer 105.
The first sense wire 202 and the second sense wire 203 that Fig. 6 B give capacitance type touch-control panel 200 are the liquid crystal working condition under the multidomain structure of tortuous distribution.The horizontal component of electric field of both direction is formed between the first sense wire 202 and the second sense wire 203 of complications distribution, the alignment direction D of the first alignment film 107 and the second alignment film 108 is formed by modes such as friction or ultraviolet lights, determines the initial orientation angle ψ of liquid crystal 1030.The alignment direction D of alignment film is parallel with the polarizing axis P1 of the first Polarizer 303, the polarizing axis P2 perpendicular quadratures with the second Polarizer 105.
Using capacitance type touch control sensing detecting system provided by the invention, the Electric Field Distribution state on contact panel can be intactly reproduced.By way of electro-optic conversion, the Electric Field Distribution on contact panel sense wire 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 rhombus sense wire (PAD) structure that capacitance type touch-control panel generally uses, 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 Fig. 7, 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 7.
Based on the sensing PAD structures shown in Fig. 7, Polarizer polarizing axis relation and alignment film alignment direction relation, by controlling the voltage of the first sense wire 202 and the second sense wire 203, the dispaly state of liquid crystal display device can be controlled.
As shown in Figure 8 A, when on the first sense wire and the second sense wire without voltage is applied, a completely black picture is shown in liquid crystal display device.
As shown in Figure 8 B, apply 0V voltages to all first sense wires, the picture being made up of multiple regular patterns is shown when applying 10V voltages to all second sense wires, on liquid crystal display device 100.Wherein, the region for showing white is exactly the region that fringe field, i.e. horizontal component of electric field are formed between the first sense wire and the second sense wire.The horizontal component of electric field region is also the region that contact panel is used for detecting position of touch.
Fig. 8 B are 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 liquid crystal display device 100.
Fig. 9 A are to occur the contact panel to break on the second sense wire.The contact panel is positioned in detecting system provided by the invention, applies 0V voltages to all first sense wires, applies 10V voltages to all second sense wires, the picture shown by liquid crystal display device 100 is as shown in Figure 9 B.There is abnormal display pattern on the display location at face broken string.
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 0V voltages to all first sense wires, applies 10V voltages to all second sense wires, the picture shown by liquid crystal display device 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 has triangle sensing PAD as shown in figure 11.Rhombus sensing PAD either shown in Fig. 7, or the triangle sensing PAD shown in Figure 11, the horizontal component of electric field formed between the 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 liquid crystal display device 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.
Based on strip sense wire PAD structures, Polarizer polarizing axis relation and the alignment film alignment direction relation shown in Figure 12, by controlling the voltage of the first sense wire 202 and the second sense wire 203, the dispaly state of liquid crystal display device can be controlled.
As shown in figure 13, apply 0V voltages to all first sense wires, the picture being made up of multiple regular patterns is shown when applying 10V voltages to all second sense wires, on liquid crystal display device 100.Wherein, the region for showing white is exactly the region that fringe field, i.e. horizontal component of electric field are formed between the first sense wire and the second sense wire.The horizontal component of electric field region is also the region that contact panel is used for detecting position of touch.
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 liquid crystal display device 100.
Figure 14 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 0V voltages to all first sense wires, applies 10V voltages to all second sense wires, the picture shown by liquid crystal display device 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 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 0V voltages to all first sense wires, applies 10V voltages to all second sense wires, the picture shown by liquid crystal display device 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.
One embodiment of the invention additionally provides voltage drive method during detection, including:The first all sense wires is unified to apply an identical voltage, and the second all sense wires uniformly applies another identical voltage.For example the first all sense wires uniformly applies 0V voltages, the second all sense wires uniformly applies 10V voltages.This detection method, 100 whole face of liquid crystal display device show the picture to be detected simultaneously.
Further embodiment of this invention provides voltage drive method during detection, including:The first all sense wires is unified to apply an identical voltage, scans the second sense wire successively.For example the first all sense wires uniformly applies 0V voltages, apply 10V voltages and scan the second sense wire successively.The second all sense wires is unified to apply an identical voltage, scans the first sense wire successively.For example the second all sense wires uniformly applies 0V voltages, apply 10V voltages and scan the first sense wire successively.This detection method, the corresponding each sense wire of liquid crystal display device 100 show a line picture, or a row picture.
Another embodiment of the present invention provides voltage drive method during detection, including:Apply a voltage to a certain sense wire of bar first, scan the second sense wire successively.After the second sense wire end of scan, apply a voltage to the sense wire of Article 2 first, and scan the second sense wire successively.After the second sense wire end of scan, apply a voltage to the sense wire of Article 3 first, and scan the second sense wire successively.After the second sense wire end of scan, apply a voltage to the sense wire of nth bar first, and scan the second sense wire successively.After the second sense wire end of scan, apply a voltage to the sense wire of the last item first, and scan the second sense wire successively.Same voltage application method, the first sense wire is exchanged with the second sense wire and detected.This detection method, each corresponding first sense wire of liquid crystal display device 100 and the second sense wire infall show the picture of a pocket.
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 condenser type
Contact panel has both sides, and horizontal component of electric field is produced by applying voltage to the sense wire, including：
Horizontal electric field LCD device, the side of the capacitance type touch-control panel is arranged on, is detected for showing
Pattern；
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 backlight.
2. detecting system according to claim 1, 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, is passed through
Apply voltage, horizontal component of electric field is formed between first sense wire and the second sense wire.
3. detecting system according to claim 2, it is characterised in that the horizontal electric field LCD device
Including：
First substrate and second substrate, opposed toward each other, liquid crystal layer, be located in the first substrate and this second
Between substrate, liquid crystal molecule rotates horizontally when applying horizontal component of electric field, light quantity of the regulation through display device；First
Alignment film and the second alignment film, it is arranged respectively at opposite opposed first substrate and the inner side table of the second substrate
Face.
4. the detecting system according to one of claim 3, it is characterised in that also including the first polaroid and
Two polaroids, it is arranged respectively at opposite opposed first substrate and the outside of the second substrate.
5. the detecting system according to one of claim 3, it is characterised in that also including the first polaroid and
Two polaroids, first polaroid are configured on the side of the light source exit direction of the backlight, and this second
Polaroid is configured in the outside of the second substrate.
6. a kind of capacitance type touch-control panel detection method, for detecting the sense wire of capacitance type touch-control panel, the condenser type
Contact panel has both sides, and horizontal component of electric field is produced by applying voltage to the sense wire, including：
Horizontal electric field LCD device is provided, the side of the capacitance type touch-control panel is arranged on, for showing
Detection pattern；
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 method according to claim 6, 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 to first sense wire and second sense wire, the liquid crystal display device shows completely black picture
Face or complete white picture；
When applying voltage to first sense wire and second sense wire, liquid crystal display device display detection picture；
By the detection picture and standard picture face than, it can be determined that just whether the circuit pattern of the transparent circuit substrate
Often.
8. detection method according to claim 7, 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.
9. detection method according to claim 7, it is characterised in that to first sense wire and second sense
Survey line, which applies voltage, to be included：
A plurality of first sense wire applies the first level voltage simultaneously, is felt successively with second electrical level voltage scanning second
Survey line or a plurality of second sense wire apply the first level voltage simultaneously, successively with second electrical level voltage scanning the
One sense wire.
10. detection method according to claim 7, it is characterised in that to first sense wire and this
Two sense wires, which apply voltage, to be included：
1st article first sense wire applies the first level voltage, is sensed successively with second electrical level voltage scanning second
Line；
After the second sense wire end of scan, the sense wire of nth bar first applies the first level voltage, and successively with the
Two level voltages scan the second sense wire, wherein, n is the natural number more than or equal to 2；
After the second sense wire end of scan, the last item first sense wire applies the first level voltage, and 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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| CN201610297113.1A CN107346067A (en) | 2016-05-06 | 2016-05-06 | Capacitance type touch-control panel detecting system and method |
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| CN201610297113.1A CN107346067A (en) | 2016-05-06 | 2016-05-06 | Capacitance type touch-control panel detecting system and method |
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| CN201610297113.1A Pending CN107346067A (en) | 2016-05-06 | 2016-05-06 | Capacitance type touch-control panel detecting system and method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108962177A (en) * | 2018-08-28 | 2018-12-07 | Oppo（重庆）智能科技有限公司 | The driving method of a kind of electronic equipment and its liquid crystal display |
| CN109377922A (en) * | 2018-09-26 | 2019-02-22 | 京东方科技集团股份有限公司 | Wireline inspection jig and method for micro- light emitting diode base plate |
| CN109444650A (en) * | 2018-12-28 | 2019-03-08 | 深圳市欧珀达科技有限公司 | The open short circuit test method and device of oversize capacitance plate monofilm |
| 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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| US20100321327A1 (en) * | 2009-06-19 | 2010-12-23 | Tpk Touch Solutions Inc. | Touch sensitive ips liquid crystal display |
| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20100321327A1 (en) * | 2009-06-19 | 2010-12-23 | Tpk Touch Solutions Inc. | Touch sensitive ips liquid crystal display |
| 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 (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108962177A (en) * | 2018-08-28 | 2018-12-07 | Oppo（重庆）智能科技有限公司 | The driving method of a kind of electronic equipment and its liquid crystal display |
| CN108962177B (en) * | 2018-08-28 | 2021-07-27 | Oppo（重庆）智能科技有限公司 | Electronic equipment and driving method of liquid crystal display screen thereof |
| CN109377922A (en) * | 2018-09-26 | 2019-02-22 | 京东方科技集团股份有限公司 | Wireline inspection jig and method for micro- light emitting diode base plate |
| CN109444650A (en) * | 2018-12-28 | 2019-03-08 | 深圳市欧珀达科技有限公司 | The open short circuit test method and device of oversize capacitance plate monofilm |
| CN109444650B (en) * | 2018-12-28 | 2021-07-30 | 深圳市欧珀达科技有限公司 | Open-short circuit testing method and device for single film of oversized capacitive screen |
| 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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