CN108646941B - TFT array substrate and detection method thereof - Google Patents
TFT array substrate and detection method thereof Download PDFInfo
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- CN108646941B CN108646941B CN201810387653.8A CN201810387653A CN108646941B CN 108646941 B CN108646941 B CN 108646941B CN 201810387653 A CN201810387653 A CN 201810387653A CN 108646941 B CN108646941 B CN 108646941B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0412—Digitisers structurally integrated in a display
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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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
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
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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
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136254—Checking; Testing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04103—Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices
Abstract
The invention provides a TFT array substrate and a detection method of the TFT array substrate. The TFT array substrate comprises a first touch detection signal output module and a second touch detection signal output module, wherein the first touch detection signal output module comprises a plurality of first switch units which respectively correspond to a plurality of touch wires and the control end of which is accessed to a first control signal, the second touch detection signal output module comprises a plurality of second switch units which respectively correspond to a plurality of touch wires and the control end of which is accessed to a second control signal, when the TFT array substrate is subjected to touch detection, the first touch detection signal output module or the second touch detection signal output module can be utilized to output touch detection signals to the plurality of touch wires by adjusting the first control signal and the second control signal, even if one of the two touch detection signal output modules is damaged, the reliable output of the touch detection signal can still be ensured, and the product quality is higher.
Description
Technical Field
The invention relates to the technical field of display, in particular to a TFT array substrate and a detection method of the TFT array substrate.
Background
In the field of Display technology, flat panel Display devices such as Liquid Crystal Display (LCD) devices and Organic Light-Emitting Diode (OLED) devices have gradually replaced Cathode Ray Tube (CRT) Display devices. The liquid crystal display device has many advantages of thin body, power saving, no radiation, etc., and is widely used.
Most of the existing liquid crystal display devices in the market are backlight liquid crystal display devices, which include a liquid crystal display panel and a backlight module (backlight module). Generally, a Liquid Crystal display panel includes a Color Filter (CF) substrate, a Thin Film Transistor (TFT) array substrate, a Liquid Crystal (LC) sandwiched between the Color Filter substrate and the TFT array substrate, and a Sealant frame (Sealant). The liquid crystal display panel has the working principle that liquid crystal molecules are placed in two parallel glass substrates, a plurality of vertical and horizontal fine wires are arranged between the two glass substrates, and the liquid crystal molecules are controlled to change directions by electrifying or not, so that light rays of the backlight module are refracted out to generate pictures.
The existing liquid crystal display panel with a touch control function can manufacture a plurality of touch control wires and a plurality of touch control sensing terminals on a TFT array substrate, wherein the plurality of touch control sensing terminals are positioned in a display area of the TFT array substrate, and the plurality of touch control wires are connected with the plurality of touch control sensing terminals and used for transmitting touch control sensing signals to the plurality of touch control sensing terminals. In order to ensure the reliability of each touch trace, in the prior art, a touch detection signal output circuit is fabricated outside the display area of the TFT array substrate, and before the TFT array substrate and the color film substrate are assembled to form the display panel, a touch detection signal is input to the plurality of touch traces by using the touch detection signal output circuit, and then whether each touch sensing terminal can normally operate is detected, so as to block a product with poor touch traces, and reduce the fabrication cost. By adopting the TFT array substrate with the structure, once the touch detection signal output circuit is damaged (such as electrostatic breakdown damage) in the manufacturing process, the touch detection signal output circuit cannot normally output the touch detection signal, and the poor touch wiring cannot be effectively detected.
Disclosure of Invention
The invention aims to provide a TFT array substrate which has high reliability of outputting a touch detection signal to a touch wire and good product quality.
Another objective of the present invention is to provide a method for detecting a TFT array substrate, which can reliably output a touch detection signal to a touch trace and is simple in operation.
In order to achieve the above object, the present invention first provides a TFT array substrate, which includes a substrate, a plurality of rows of touch traces disposed on the substrate, a first touch detection signal output module electrically connected to the plurality of rows of touch traces, and a second touch detection signal output module electrically connected to the plurality of rows of touch traces;
the first touch detection signal output module comprises a plurality of first switch units respectively corresponding to the plurality of touch wires; the control end of the first switch unit is connected with a first control signal, and the output end of the first switch unit is electrically connected with the corresponding touch control wiring; the input end of the first switch unit corresponding to the odd-numbered rows of touch-control wires is connected with a first touch-control detection signal, and the input end of the first switch unit corresponding to the even-numbered rows of touch-control wires is connected with a second touch-control detection signal;
the second touch detection signal output module comprises a plurality of second switch units respectively corresponding to the plurality of touch wires; the control end of the second switch unit is connected with a second control signal, and the output end of the second switch unit is electrically connected with the corresponding touch control wiring; the input end of the second switch unit corresponding to the odd-numbered rows of touch-control wires is connected with the first touch-control detection signal, and the input end of the second switch unit corresponding to the even-numbered rows of touch-control wires is connected with the second touch-control detection signal.
The substrate comprises an effective display area and a chip binding area arranged at one end of the effective display area; the touch control wires are all positioned in the effective display area; the first touch detection signal output module is positioned between the chip binding area and the effective display area; the second touch detection signal output module is positioned at one end of the chip binding area, which is far away from the effective display area.
The first touch detection signal output module further comprises a first control signal wire and at least one first control signal generation unit electrically connected with the first control signal wire; the control ends of the first switch units are electrically connected with the first control signal routing; the first control signal generating unit is used for providing a first control signal for the first control signal routing.
The first touch detection signal output module comprises two first control signal generating units, and the two first control signal generating units are respectively connected with two ends of the first control signal wiring.
The second touch detection signal output module further comprises a second control signal wire and at least one second control signal generation unit electrically connected with the second control wire, the control ends of the plurality of second switch units are electrically connected with the second control signal wire, and the second control signal generation unit is used for providing a second control signal for the second control signal wire.
The second touch detection signal output module comprises a second control signal generation unit, and the second control signal generation unit is electrically connected with one end of the second control signal routing.
The first switch unit is a first N-type thin film transistor, a grid electrode of the first N-type thin film transistor is a control end of the first switch unit, a source electrode of the first N-type thin film transistor is an input end of the first switch unit, and a drain electrode of the first N-type thin film transistor is an output end of the first switch unit.
The second switch unit is a second N-type thin film transistor, a grid electrode of the second N-type thin film transistor is a control end of the second switch unit, a source electrode of the second N-type thin film transistor is an input end of the second switch unit, and a drain electrode of the second N-type thin film transistor is an output end of the second switch unit.
The substrate also comprises a flexible circuit board binding area which is arranged at one end of the chip binding area far away from the effective display area;
the second touch detection signal output module is arranged between the chip binding area and the flexible circuit board binding area.
The invention also provides a detection method of the TFT array substrate, which is used for detecting the TFT array substrate and comprises the following steps:
the first control signal controls the plurality of first switch units to be conducted, the second control signal controls the plurality of second switch units to be cut off, the first touch detection signal is input into the touch wires of the odd-numbered rows through the first switch units corresponding to the touch wires of the odd-numbered rows, and the second touch detection signal is input into the touch wires of the even-numbered rows through the first switch units corresponding to the touch wires of the even-numbered rows;
the first control signal controls the plurality of first switch units to be switched off, the second control signal controls the plurality of second switch units to be switched on, the first touch detection signal is input into the touch wires of the odd-numbered rows through the second switch units corresponding to the touch wires of the odd-numbered rows, and the second touch detection signal is input into the touch wires of the even-numbered rows through the second switch units corresponding to the touch wires of the even-numbered rows.
The invention has the beneficial effects that: the invention provides a TFT array substrate comprising a first touch detection signal output module and a second touch detection signal output module, wherein the first touch detection signal output module comprises a plurality of first switch units which respectively correspond to a plurality of touch wires and the control end of which is accessed with a first control signal, the second touch detection signal output module comprises a plurality of second switch units which respectively correspond to a plurality of touch wires and the control end of which is accessed with a second control signal, when the TFT array substrate is subjected to touch detection, the first touch detection signal output module or the second touch detection signal output module can be utilized to output touch detection signals to the plurality of touch wires by adjusting the first control signal and the second control signal, even if one of the two touch detection signal output modules is damaged, the reliable output of the touch detection signal can still be ensured, and the product quality is higher. The detection method of the TFT array substrate provided by the invention can reliably output the touch detection signal to the touch routing and is simple to operate.
Drawings
For a better understanding of the nature and technical aspects of the present invention, reference should be made to the following detailed description of the invention, taken in conjunction with the accompanying drawings, which are provided for purposes of illustration and description and are not intended to limit the invention.
In the drawings, there is shown in the drawings,
FIG. 1 is a schematic structural diagram of a TFT array substrate according to the present invention;
fig. 2 is a flowchart of a testing method of the TFT array substrate according to the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Referring to fig. 1, the present invention provides a TFT array substrate, which includes a substrate 100, a plurality of rows of touch traces 200 disposed on the substrate 100, a first touch detection signal output module 310 electrically connected to the plurality of rows of touch traces 200, and a second touch detection signal output module 320 electrically connected to the plurality of rows of touch traces 200.
The first touch detection signal output module 310 includes a plurality of first switch units 311 respectively corresponding to the plurality of touch traces 200. The control end of the first switch unit 311 is connected to the first control signal TPEN1, and the output end is electrically connected to the corresponding touch trace 200. The input end of the first switch unit 311 corresponding to the odd-numbered row of touch traces 200 is connected to the first touch detection signal TPDO, and the input end of the first switch unit 311 corresponding to the even-numbered row of touch traces 200 is connected to the second touch detection signal TPDE.
The second touch detection signal output module 320 includes a plurality of second switch units 321 respectively corresponding to the plurality of touch traces 200. The control end of the second switch unit 321 is connected to the second control signal TPEN2, and the output end is electrically connected to the corresponding touch trace 200. The input end of the second switch unit 321 corresponding to the odd-numbered row of touch traces 200 is connected to the first touch detection signal TPDO, and the input end of the second switch unit 321 corresponding to the even-numbered row of touch traces 200 is connected to the second touch detection signal TPDE.
Specifically, referring to fig. 1, the substrate 100 includes an effective display area 110, and a chip bonding area 120 disposed at one end of the effective display area 110, where the chip bonding area 120 is used for bonding an integrated circuit chip (IC) for driving the TFT array substrate to work. The touch traces 200 are all located in the effective display area 110. The first touch detection signal output module 310 is located between the chip bonding area 120 and the active display area 110. The second touch detection signal output module 320 is located at an end of the chip bonding area 120 away from the active display area 110.
Further, the substrate 100 further includes a flexible circuit board binding region 130 disposed at an end of the chip binding region 120 away from the effective display region 110, where the flexible circuit board binding region 130 is used for binding with a flexible circuit board, so that the TFT array substrate is electrically connected to an external circuit structure thereof. The second touch detection signal output module 320 is disposed between the chip bonding area 120 and the flexible circuit board bonding area 130.
Specifically, the TFT array substrate further includes a plurality of touch sensing terminals (not shown) disposed in the effective display area 110, and each touch sensing terminal is electrically connected to one of the touch traces 200 correspondingly for implementing a touch sensing function.
Specifically, referring to fig. 1, the first touch detection signal output module 310 further includes a first control signal trace 312 and at least one first control signal generating unit 313 electrically connected to the first control signal trace 312. The control ends of the plurality of first switch units 311 are electrically connected to the first control signal trace 312. The first control signal generating unit 313 is configured to provide the first control signal TPEN1 to the first control signal trace 312.
Further, in the embodiment shown in fig. 1, the first touch detection signal output module 310 includes two first control signal generating units 313, and the two first control signal generating units 313 are respectively connected to two ends of the first control signal trace 312. Of course, in other embodiments of the invention, in order to reduce the area occupied by the first touch detection signal output module 310 on the substrate 100, only one control signal generating unit 313 may be provided. In other embodiments of the present invention, in order to increase the driving capability of the first control signal TPEN1 to the plurality of first switch units 311, two or more first control signal generating units 313 may be provided without affecting the implementation of the present invention.
Specifically, referring to fig. 1, the second touch detection signal output module 320 further includes a second control signal trace 322 and at least one second control signal generation unit 323 electrically connected to the second control trace 322, control ends of the plurality of second switch units 321 are electrically connected to the second control signal trace 322, and the second control signal generation unit 323 is configured to provide a second control signal TPEN2 to the second control signal trace 322.
Further, in the embodiment shown in fig. 1, the second touch detection signal output module 320 includes a second control signal generating unit 323, and the second control signal generating unit 323 is electrically connected to one end of the second control signal trace 322. Of course, in other embodiments of the present invention, in order to increase the driving capability of the second control signal TPEN2 to the plurality of second switching units 321, two or more second control signal generating units 323 may be provided, which does not affect the implementation of the present invention.
Specifically, in the embodiment shown in fig. 1, the first switch unit 311 is a first N-type thin film transistor T1, a gate of the first N-type thin film transistor T1 is a control terminal of the first switch unit 311, a source is an input terminal of the first switch unit 311, and a drain is an output terminal of the first switch unit 311. The second switch unit 321 is a second N-type thin film transistor T2, a gate of the second N-type thin film transistor T1 is a control terminal of the second switch unit 321, a source thereof is an input terminal of the second switch unit 321, and a drain thereof is an output terminal of the second switch unit 321. Of course, in other embodiments of the present invention, both the first switch unit 311 and the second switch unit 321 may be P-type thin film transistors, or one of the first switch unit 311 and the second switch unit 321 is a P-type thin film transistor and the other is an N-type thin film transistor, which does not affect the implementation of the present invention.
Taking the embodiment shown in fig. 1 as an example, when performing touch detection on the TFT array substrate of the present invention, the first control signal TPEN1 is set to be high level to control the plurality of first switch units 311 to be turned on, and the second control signal TPEN2 is set to be low level to control the plurality of second switch units 321 to be turned off, at this time, the first touch detection signal TPDO is input into the touch traces 200 of the odd columns through the first switch units 311 corresponding to the touch traces 200 of the odd columns, the second touch detection signal TPDE is input into the touch traces 200 of the even columns through the first switch units 311 corresponding to the touch traces 200 of the even columns, and the first control signal TPEN1 is set to be low level to control the plurality of first switch units 311 to be turned off, and the second control signal TPEN2 is set to be high level to control the plurality of second switch units 321 to be turned on, the first touch detection signal TPDO is input into the touch traces 200 of the odd columns through the second switch units 321 corresponding to the touch traces 200 of the odd columns, the second touch detection signal TPDE is input into the even-numbered rows of the touch traces 200 through the second switch unit 321 corresponding to the even-numbered rows of the touch traces 200, that is, in the present invention, by adjusting the first control signal TPEN1 and the second control signal TPEN2, one of the first touch detection signal output module 310 and the second touch detection signal output module 320 can be used to provide a touch detection signal for the plurality of touch traces 200, when one of the first touch detection signal output module 310 and the second touch detection signal output module 320 is damaged due to a manufacturing process, the other one can also continue to provide a touch detection signal for the touch traces 200, so that the reliability of providing the touch detection signal for the touch traces 200 can be improved, the detection of the TFT array substrate cannot be affected, and the reliability of detection can be improved. Further, in the present invention, the second touch detection signal output module 320 is disposed at an end of the chip bonding area 120 away from the effective display area 110, specifically, between the chip bonding area 120 and the flexible circuit board bonding area 130, because a blank area exists between the chip bonding area and the flexible circuit board in the prior art, the area can be fully utilized by disposing the second touch detection signal output module 320 in the blank area, and an additional space for disposing the second touch detection signal output module 320 is not added on the substrate 100.
Referring to fig. 2, based on the same inventive concept, the present invention further provides a method for inspecting the TFT array substrate shown in fig. 1, and the structure of the TFT array substrate is not described repeatedly herein. The detection method of the TFT array substrate comprises the following steps:
in step S1, the first control signal TPEN1 controls the plurality of first switch units 311 to be turned on, the second control signal TPEN2 controls the plurality of second switch units 321 to be turned off, the first touch detection signal TPDO is input into the touch traces 200 in the odd columns through the first switch units 311 corresponding to the touch traces 200 in the odd columns, and the second touch detection signal TPDE is input into the touch traces 200 in the even columns through the first switch units 311 corresponding to the touch traces 200 in the even columns.
Specifically, in the embodiment shown in fig. 1, in the step S1, the plurality of first switching units 311 are controlled to be turned on by making the first control signal TPEN1 be at a high level, and the plurality of second switching units 321 are controlled to be turned off by making the second control signal TPEN2 be at a low level at the same time.
In step S2, the first control signal TPEN1 controls the plurality of first switch units 311 to be turned off, the second control signal TPEN2 controls the plurality of second switch units 321 to be turned on, the first touch detection signal TPDO is input into the touch traces 200 in the odd columns through the second switch units 321 corresponding to the touch traces 200 in the odd columns, and the second touch detection signal TPDE is input into the touch traces 200 in the even columns through the second switch units 321 corresponding to the touch traces 200 in the even columns.
Specifically, in the embodiment shown in fig. 1, in the step S2, the plurality of first switching units 311 are controlled to be turned off by making the first control signal TPEN1 be at a low level, and the plurality of second switching units 321 are controlled to be turned on by making the second control signal TPEN2 be at a high level at the same time.
It should be noted that, in the detection method of the TFT array substrate of the present invention, by adjusting the first control signal TPEN1 and the second control signal TPEN2, one of the first touch detection signal output module 310 and the second touch detection signal output module 320 can be used to provide a touch detection signal for the plurality of touch traces 200, when one of the first touch detection signal output module and the second touch detection signal output module 320 is damaged due to a manufacturing process, the other touch detection signal can be continuously provided for the touch trace 200, so that the reliability of providing the touch detection signal for the touch trace 200 can be improved, the detection of the TFT array substrate is not affected, and the detection reliability is improved. Further, in the present invention, the second touch detection signal output module 320 is disposed at an end of the chip bonding area 120 away from the effective display area 110, specifically, between the chip bonding area 120 and the flexible circuit board bonding area 130, because a blank area exists between the chip bonding area and the flexible circuit board in the prior art, the area can be fully utilized by disposing the second touch detection signal output module 320 in the blank area, and an additional space for disposing the second touch detection signal output module 320 is not added on the substrate 100.
In summary, the TFT array substrate of the present invention includes a first touch detection signal output module and a second touch detection signal output module, wherein the first touch detection signal output module includes a plurality of first switch units respectively corresponding to a plurality of touch traces and having control terminals connected to first control signals, the second touch detection signal output module includes a plurality of second switch units respectively corresponding to a plurality of touch traces and having control terminals connected to second control signals, when the TFT array substrate is subjected to touch detection, the first touch detection signal output module or the second touch detection signal output module can be utilized to output touch detection signals to the plurality of touch wires by adjusting the first control signal and the second control signal, even if one of the two touch detection signal output modules is damaged, the reliable output of the touch detection signal can still be ensured, and the product quality is higher. The detection method of the TFT array substrate can reliably output the touch detection signal to the touch wire, and is simple to operate.
As described above, it will be apparent to those skilled in the art that other various changes and modifications may be made based on the technical solution and concept of the present invention, and all such changes and modifications are intended to fall within the scope of the appended claims.
Claims (9)
1. A TFT array substrate is characterized by comprising a substrate (100), a plurality of rows of touch control wires (200) arranged on the substrate (100), a first touch control detection signal output module (310) electrically connected with the plurality of rows of touch control wires (200) and a second touch control detection signal output module (320) electrically connected with the plurality of rows of touch control wires (200);
the first touch detection signal output module (310) comprises a plurality of first switch units (311) respectively corresponding to the plurality of touch traces (200); the control end of the first switch unit (311) is connected to a first control signal (TPEN 1), and the output end of the first switch unit is electrically connected with the corresponding touch-control wiring (200); the input end of the first switch unit (311) corresponding to the odd-numbered row of touch-control wires (200) is connected with a first touch-control detection signal (TPDO), and the input end of the first switch unit (311) corresponding to the even-numbered row of touch-control wires (200) is connected with a second touch-control detection signal (TPDE);
the second touch detection signal output module (320) comprises a plurality of second switch units (321) respectively corresponding to the plurality of touch wires (200); the control end of the second switch unit (321) is connected to a second control signal (TPEN 2), and the output end of the second switch unit is electrically connected to the corresponding touch-control wiring (200); the input end of the second switch unit (321) corresponding to the odd-numbered columns of touch-control wires (200) is connected with the first touch-control detection signal (TPDO), and the input end of the second switch unit (321) corresponding to the even-numbered columns of touch-control wires (200) is connected with the second touch-control detection signal (TPDE);
the substrate (100) comprises an effective display area (110) and a chip binding area (120) arranged at one end of the effective display area (110); the touch-control routing lines (200) are all positioned in the effective display area (110); the first touch detection signal output module (310) is located between the chip bonding area (120) and the effective display area (110); the second touch detection signal output module (320) is located at one end of the chip bonding area (120) far away from the effective display area (110).
2. The TFT array substrate of claim 1, wherein the first touch detection signal output module (310) further comprises a first control signal trace (312) and at least one first control signal generating unit (313) electrically connected to the first control signal trace (312); the control ends of the first switch units (311) are electrically connected with the first control signal routing lines (312); the first control signal generating unit (313) is configured to provide a first control signal (TPEN 1) to the first control signal trace (312).
3. The TFT array substrate of claim 2, wherein the first touch detection signal output module (310) comprises two first control signal generating units (313), and the two first control signal generating units (313) are respectively connected to two ends of the first control signal trace (312).
4. The TFT array substrate according to claim 1, wherein the second touch detection signal output module (320) further comprises a second control signal trace (322) and at least one second control signal generating unit (323) electrically connected to the second control signal trace (322), the control ends of the plurality of second switch units (321) are electrically connected to the second control signal trace (322), and the second control signal generating unit (323) is configured to provide a second control signal (TPEN 2) to the second control signal trace (322).
5. The TFT array substrate of claim 4, wherein the second touch detection signal output module (320) comprises a second control signal generation unit (323), the second control signal generation unit (323) being electrically connected to one end of the second control signal trace (322).
6. The TFT array substrate of claim 1, wherein the first switch unit (311) is a first N-type thin film transistor (T1), a gate of the first N-type thin film transistor (T1) is a control terminal of the first switch unit (311), a source is an input terminal of the first switch unit (311), and a drain is an output terminal of the first switch unit (311).
7. The TFT array substrate of claim 1, wherein the second switch unit (321) is a second N-type thin film transistor (T2), the gate of the second N-type thin film transistor (T1) is the control terminal of the second switch unit (321), the source is the input terminal of the second switch unit (321), and the drain is the output terminal of the second switch unit (321).
8. The TFT array substrate of claim 1, wherein the substrate (100) further comprises a flexible circuit board bonding region (130) disposed at an end of the chip bonding region (120) remote from the active display region (110);
the second touch detection signal output module (320) is arranged between the chip binding area (120) and the flexible circuit board binding area (130).
9. A method for inspecting a TFT array substrate according to any one of claims 1 to 8, comprising:
the first control signal (TPEN 1) controls the plurality of first switch units (311) to be turned on, the second control signal (TPEN 2) controls the plurality of second switch units (321) to be turned off, the first touch detection signal (TPDO) is input into the touch tracks (200) in the odd columns through the first switch units (311) corresponding to the touch tracks (200) in the odd columns, and the second touch detection signal (TPDE) is input into the touch tracks (200) in the even columns through the first switch units (311) corresponding to the touch tracks (200) in the even columns;
the first control signal (TPEN 1) controls the plurality of first switch units (311) to be turned off, the second control signal (TPEN 2) controls the plurality of second switch units (321) to be turned on, the first touch detection signal (TPDO) is input into the touch lines (200) in the odd columns through the second switch units (321) corresponding to the touch lines (200) in the odd columns, and the second touch detection signal (TPDE) is input into the touch lines (200) in the even columns through the second switch units (321) corresponding to the touch lines (200) in the even columns.
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