CN106909253B - Touch display panel and touch display device - Google Patents
Touch display panel and touch display device Download PDFInfo
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- CN106909253B CN106909253B CN201710131947.XA CN201710131947A CN106909253B CN 106909253 B CN106909253 B CN 106909253B CN 201710131947 A CN201710131947 A CN 201710131947A CN 106909253 B CN106909253 B CN 106909253B
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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
- G02F1/133—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
- 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
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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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Abstract
The invention discloses a touch display panel and a touch display device thereof, which comprise a plurality of test routing groups positioned in a non-display area, wherein each test routing group connects two corresponding touch electrode blocks in series through a touch signal line, and the test routing group comprises a first test control unit positioned on one side of the touch signal line, which is far away from an integrated circuit, and a third switch device positioned on one side of the touch signal line, which is close to the integrated circuit. During testing, different voltages are input to the input end of the testing wire group, and the switching device of the testing wire group is controlled to be switched on and switched off, so that the problem that whether the whole touch signal wire is broken can be detected, poor interception in the panel manufacturing stage is realized, later-stage module material waste is reduced, and the product yield is improved.
Description
Technical Field
The present invention relates to the field of touch technologies, and in particular, to a touch display panel and a touch display device capable of detecting a disconnection.
Background
With the rapid development of display technology, touch display devices have gradually spread throughout the lives of people. Currently, a touch display device can be divided into: the touch display device comprises an outer hanging type touch display device, a surface covering type touch display device and an inner embedding type touch display device, wherein the inner embedding type touch display device is used for embedding a touch electrode into a liquid crystal display panel, the whole thickness of a module can be reduced, the manufacturing cost of the touch display device can be greatly reduced, and the touch display device is favored by various large panel manufacturers.
In an existing In-Cell Touch Display Panel (In Cell Touch Panel), a common electrode layer of a Liquid Crystal Display (LCD) Panel is generally divided into a plurality of Touch electrode blocks, each of the Touch electrode blocks is connected to a control terminal driving unit through a Touch signal line, the driving unit includes an integrated circuit for Display driving and an integrated circuit for Touch driving, and the Touch electrode blocks are multiplexed as a common electrode for Display. In the display state, the touch electrode block is used as a common electrode for display in a multiplexing mode and receives and displays a common voltage signal from the integrated circuit for display driving; in a touch state, the touch electrode block serves as a touch driving electrode and receives a touch driving signal from the touch driving integrated circuit.
In the manufacturing process of the embedded touch display panel, a mature and effective detection mode is not used for detecting whether the touch electrode and the corresponding touch signal line are abnormal before the control driving unit is bound, whether the touch signal line is abnormal can be judged only through the display function of the detection panel, whether the line breakage phenomenon exists is judged through an optical microscope machine when the abnormality is displayed, the detection process period is long, and the operation is complex.
Fig. 1 is a schematic diagram of a touch display panel in the prior art, and fig. 2 is a schematic diagram of a detection circuit connection of a touch display panel in the prior art. As shown in fig. 1 and 2, the conventional touch display panel includes touch electrode blocks 200 and a test module 500 arranged in a matrix. The touch electrode block 200 is connected to the corresponding touch signal line 100 through the connection hole 300, and is connected to the integrated circuit 400 through the corresponding touch signal line 100, and is multiplexed as a common electrode and a touch detection electrode. The test module 500 is usually disposed at an end of the touch display panel away from the integrated circuit 400. The test module 500 includes a plurality of switching devices 501, a control signal input 502, and a test signal input 503.
Each touch electrode block 200 is connected to a test signal input terminal 503 through a corresponding switching device 501, and control terminals of all the switching devices 501 are connected to a control signal input terminal 502. As shown in fig. 1 and 2, when a conventional touch display panel is tested, a voltage is input to each touch electrode block 200, and whether the area where the touch electrode block 200 is located is lit or not is observed to check whether the corresponding touch signal line 100 can operate normally, and the Test module 500 is only disposed at one end of the touch display panel away from the integrated circuit 400, so that the VT (Visual Test) testing method can only detect the virtual line portion of the touch signal line 100 between the connection hole 300 and the Test module 500, but cannot confirm that the solid line portion of the touch signal line 100 between the connection hole 300 and the integrated circuit 400, which is actually used in touch detection of the touch display panel, i.e., the VT detection has a large range of dead zones.
Disclosure of Invention
To solve the above problems, the present invention provides a touch display panel, comprising: a substrate including a display region and a non-display region; the touch electrode blocks are arranged in a matrix manner and are positioned in the display area; the touch signal lines are used for conducting the corresponding touch electrode blocks with the integrated circuit positioned in the non-display area; and the plurality of test wiring groups are positioned in the non-display area, and each test wiring group connects two corresponding touch electrode blocks together in series through a touch signal line.
In an embodiment of the present invention, the test routing group includes: the first test control unit is positioned in a non-display area on one side of the touch signal line, which is far away from the integrated circuit; and the second test control unit is positioned in the non-display area of one side, close to the integrated circuit, of the touch signal line.
In an embodiment of the invention, the first test control unit includes a first switch device, a second switch device, a first input terminal and a second input terminal, and the touch signal lines include a first touch signal line and a second touch signal line; the first input end is connected with a first touch signal line through a first switch device; the second input end is connected with a second touch signal line through a first switch device.
In an embodiment of the invention, during testing, different voltages are applied to the first input terminal and the second input terminal.
In an embodiment of the present invention, the first test control unit further includes: a first control signal input terminal connected to the control terminal of the first switching device; and the second control signal input end is connected with the control end of the second switching device.
In an embodiment of the present invention, the first switching device and the second switching device are thin film transistors, and the control terminals of the first switching device and the second switching device are gates of the thin film transistors.
In an embodiment of the invention, the second test control unit includes a third switching device, and the first touch signal line and the second touch signal line are connected through the third switching device.
In an embodiment of the present invention, the second test control unit further includes: and the third control signal input end is connected with the control end of the third switching device.
In an embodiment of the invention, the third switching device is a thin film transistor, and the control terminal of the third switching device is a gate of the thin film transistor.
In an embodiment of the invention, the touch electrode block includes a first touch electrode block connected to the first touch signal line, and a second touch electrode block connected to the second touch signal line; the first touch electrode block and the second touch electrode block are positioned on the same row and are arranged adjacently.
In an embodiment of the invention, the integrated circuit is disposed between the second test control unit and the touch signal line.
The invention also provides a touch display device comprising the touch display panel.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
the invention provides a touch display panel and a touch display device, which comprise a plurality of test wiring sets positioned in a non-display area, wherein each test wiring set connects two corresponding touch electrode blocks in series through a touch signal line, and each test wiring set comprises a first test control unit positioned on one side of the touch signal line, which is far away from an integrated circuit, and a third switch device positioned on one side of the touch signal line, which is close to the integrated circuit. The first test control unit comprises a first switch device, a second switch device, a first input end and a second input end, one end of a first touch signal line is connected with the first input end through the first switch device, and one end of a second touch signal line is connected with the second input end through the second switch device; meanwhile, the other ends of the first touch signal line and the second touch signal line are connected in series through a third switching device. During testing, different voltages are input to the first input end and the second input end, and the first switch device, the second switch device and the third switch device are controlled to be turned on and turned off, so that the problem that whether the whole touch signal line is broken can be sequentially detected, in the manufacturing process of the touch display device, poor interception in the panel manufacturing stage is realized, the waste of later-stage module materials is reduced, and the product yield is improved.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments made with reference to the following drawings:
FIG. 1 is a schematic diagram of a touch display panel according to the prior art;
FIG. 2 is a schematic diagram of a detection circuit of a touch display panel according to the prior art;
fig. 3 is a schematic connection diagram of a detection circuit of a touch display panel according to an embodiment of the invention;
FIG. 4 is a diagram illustrating a test state of a detection circuit of the touch display panel shown in FIG. 3;
fig. 5 is a schematic diagram illustrating another test state of the detection circuit of the touch display panel shown in fig. 3.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
The invention provides a touch display panel and a touch display device, which comprise a plurality of test wiring sets positioned in a non-display area, wherein each test wiring set connects two corresponding touch electrode blocks in series through a touch signal line, and each test wiring set comprises a first test control unit positioned on one side of the touch signal line, which is far away from an integrated circuit, and a third switch device positioned on one side of the touch signal line, which is close to the integrated circuit. The first test control unit comprises a first switch device, a second switch device, a first input end and a second input end, one end of a first touch signal line is connected with the first input end through the first switch device, and one end of a second touch signal line is connected with the second input end through the second switch device; meanwhile, the other ends of the first touch signal line and the second touch signal line are connected in series through a third switching device. During testing, different voltages are input to the first input end and the second input end, and the first switch device, the second switch device and the third switch device are controlled to be turned on and turned off, so that the problem that whether the whole touch signal line is broken can be sequentially detected, in the manufacturing process of the touch display device, poor interception in the panel manufacturing stage is realized, the waste of later-stage module materials is reduced, and the product yield is improved.
Fig. 3 is a schematic diagram illustrating connection of a detection circuit of a touch display panel according to an embodiment of the invention, where the touch display panel includes a substrate 01, and the substrate 01 includes a display area 012 and a non-display area 011. A plurality of pixel units formed by intersecting data lines and gate lines are disposed in the display area 012 of the substrate 01, the data lines and the gate lines are respectively connected to the corresponding pixel units, and the integrated circuit 40 provides a data voltage signal to the pixel electrode of each pixel unit through the data lines for displaying images.
The touch display panel further includes a common electrode layer and a pixel electrode layer, the common electrode layer and the pixel electrode layer are located in the display area 012 of the substrate 01, the common electrode layer includes a plurality of mutually insulated touch electrode blocks 20, each touch electrode block 20 is time-division multiplexed as a touch detection electrode and a common electrode, the pixel electrode layer includes a plurality of pixel electrodes (not shown in the figure); each touch electrode block 20 is connected to the integrated circuit 40 located in the non-display area 011 of the substrate 01. When the touch electrode block 20 is used as a touch detection electrode, the integrated circuit 40 controls the touch display device formed by the touch display panel to realize touch sensing, and when the touch electrode block 20 is used as a common electrode, a voltage difference exists between the common electrode and a pixel electrode corresponding to the common electrode under the driving of the integrated circuit 40, so that the area can display different colors according to needs, and the touch display device where the touch display panel is located displays images.
Specifically, the touch display panel further includes a plurality of touch signal lines 10, and the plurality of touch signal lines 10 are disposed in one-to-one correspondence with the plurality of touch electrode blocks 20 and are connected to the plurality of touch electrode blocks 20 in one-to-one correspondence via the connection holes 30. When the touch electrode blocks 20 serve as touch detection electrodes, each touch electrode block 20 is connected to the integrated circuit 40 through the touch signal line 10. In the touch detection process, the integrated circuit 40 generates a touch driving signal, and the touch driving signal is provided to the touch electrode block 20 through the touch signal line 10, so that the touch electrode block 20 has a certain amount of charge, the integrated circuit 40 reads the change condition of the charged state in the touch electrode block 20 through the touch signal line 10, and through the change of the charged state, which one or more touch electrode blocks 20 are touched can be judged, so that the position of a touch point can be further determined. The touch driving signal and the change condition of the charged state can be understood as a pulse signal.
The touch display panel further includes a plurality of test routing groups located in the non-display area 011 of the substrate 01, each test routing group including a first test control unit and a second test control unit, each test routing group connecting two adjacent touch signal lines 10 in series, for example, connecting the first touch signal line 101 and the second touch signal line 102 in series, and further connecting the first touch electrode block 201 and the second touch electrode block 202 in series.
Specifically, in the present embodiment, the plurality of touch electrode blocks 20 are arranged in a matrix, the plurality of touch signal lines 10 extend along the row direction, and are disposed adjacent to the touch signal lines 10 corresponding to two adjacent touch electrode blocks 20 on the same row, for example, the two adjacent touch electrode blocks 20 are a first touch electrode block 201 and a second touch electrode block 202, respectively, and the two adjacent touch signal lines 10 are a first touch signal line 101 and a second touch signal line 102, respectively, wherein the first touch electrode block 201 is connected to the integrated circuit 40 through the first touch signal line 101, and the second touch electrode block 202 is connected to the integrated circuit 40 through the second touch signal line 102; and each integrated circuit 40 is disposed in the non-display area 011 at one end of the corresponding touch signal line 10.
The first test control unit is disposed on the substrate 01 and located in the non-display area 011 where one end of the touch signal line 10 away from the integrated circuit 40 is located, and specifically, the first test control unit includes a first switch device T11, a second switch device T12, a first input end COM11, and a second input end COM 12. An input terminal of the first switching device T11 is connected to a first input terminal COM11 for receiving a first voltage signal, an output terminal of the first switching device T11 is connected to an end of the first touch signal line 101 away from the integrated circuit 40, and a control terminal of the first switching device T11 is connected to a first control signal input terminal SW11, so that the first switching device T11 can be controlled to be turned on and off by a first control signal; the input terminal of the second switching device T12 is connected to the second input terminal COM12 for receiving a second voltage signal, the output terminal of the second switching device T12 is connected to the end of the second touch signal line 102 away from the integrated circuit 40, and the control terminal of the second switching device T12 is connected to the second control signal input terminal SW12, so that the second switching device T12 can be controlled to be turned on and off by a second control signal.
During testing, different voltages are applied to the first input terminal COM11 and the second input terminal COM 12.
In the embodiment of the present invention, the first switching device T11 and the second switching device T12 may be thin film transistors, for example. Accordingly, when the first and second switching devices T11 and T12 are thin film transistors, the control terminals of the first and second switching devices T11 and T12 are gates of the thin film transistors.
The second test control unit is disposed on the substrate 01 and located in the non-display area 011 of the touch signal line 10 near the integrated circuit 40, and specifically, the second test control unit includes a third switching device T2. The control terminal of the third switching device T2 is connected to the third control signal input terminal SW2, and the first touch signal line 101 and the second touch signal line 102 are connected together through the third switching device T2.
In the embodiment of the present invention, the third switching device T2 therein may be a thin film transistor, for example. Accordingly, when the third switching device T2 is a thin film transistor, the control terminal of the third switching device T2 is the gate of the thin film transistor.
In the embodiment of the invention, the integrated circuit 40 may be disposed between the second test control unit and the touch signal line 10, that is, the first touch signal line 101 and the second touch signal line 102 of the third switching device T2 are respectively connected in series through the integrated circuit 40.
Fig. 4 is a schematic diagram showing a test state of the detection circuit of the touch display panel shown in fig. 3, and fig. 5 is another schematic diagram showing a test state of the detection circuit of the touch display panel shown in fig. 3, and referring to fig. 4-5, in a manufacturing process of the touch display panel, when a touch signal line needs to be detected, a common voltage signal or a data voltage signal is provided to the input terminals of the first switching device T11 and the second switching device T12 through the first input terminal COM11 and the second input terminal COM12 in a time sharing manner, and the common voltage signal is different from the data voltage signal.
In the detection process, first, the first switching device T11 and the third switching device T2 are turned on and the second switching device T12 is turned off by the control signals inputted through the first control signal input terminal SW11, the second control signal input terminal SW12 and the third control signal input terminal SW 2. In this state, the first touch electrode block 201 and the second touch electrode block 202 are connected in series through the first touch signal line 101 and the second touch signal line 102, and the first input terminal COM11 provides a common voltage signal to the first touch electrode block 201 and the second touch electrode block 202 through the first touch signal line 101 and the second touch signal line 102; moreover, the pixel electrodes corresponding to the first touch electrode block 201 and the second touch electrode block 202 provide a data voltage signal through the data lines connected to the pixel electrodes, so that a voltage difference is generated between the pixel electrodes and the data lines, and the areas where the first touch electrode block 201 and the second touch electrode block 202 are located are lighted.
Then, the first switching device T11 and the third switching device T2 are kept in an on state, and the second switching device T12 is kept in an off state, and the input voltage of the first input terminal COM11 is changed, so that the first input terminal COM11 provides a data voltage signal for the first touch electrode block 201 and the second touch electrode block 202 through the first touch signal 101 and the second touch signal line 102; since the pixel electrodes corresponding to the first touch electrode block 201 and the second touch electrode block 202 also provide a data voltage signal through the data lines connected thereto, so that the voltage difference between the two is zero, if there is no abnormality in the connection lines connecting the first touch electrode block 201, the second touch electrode block 202 and the first switching device T11, the areas where the first touch electrode block 201 and the second touch electrode block 202 are located will change from the original bright state to the dark state.
That is to say, when the areas where the first touch electrode block 201 and the second touch electrode block 202 are located are in a bright state, the input voltage of the first input terminal COM11 is changed to be a data voltage, and if the areas where the first touch electrode block 201 and the second touch electrode block 202 are located are changed from the bright state to a dark state at this time, it indicates that the entire portion 10b between the connection hole 30 of the first touch signal line 101 and the second touch signal line 102 and the second test control unit is normal, and there is no disconnection problem.
Of course, if any one or two corresponding areas of the first touch electrode block 201 and the second touch electrode block 202 still remain bright at this time, it can be proved that at least one of the first touch signal line 101 and the second touch signal line 102 has a disconnection problem and should be prevented from entering the module assembling stage of the next process.
Similarly, it can also be determined whether there is a disconnection problem in the portion 10b between the connection hole 30 of the second touch signal line 102 and the first touch signal line 101 and the second test control unit.
Specifically, the control signals inputted through the first control signal input terminal SW11, the second control signal input terminal SW12 and the third control signal input terminal SW2 make the second switching device T12 and the third switching device T2 in an on state, and the first switching device T11 in an off state. The second input end COM12 provides a common voltage signal to the first touch electrode block 201 and the second touch electrode block 202 through the second touch signal 102 and the first touch signal line 101, and lights up the areas where the first touch electrode block 201 and the second touch electrode block 202 are located; then, the input voltage of the second input terminal COM12 is changed to a data voltage, and the second input terminal COM12 provides a data voltage signal to the first touch electrode block 201 and the second touch electrode block 202 through the first touch signal 101 and the second touch signal line 102; moreover, since the pixel electrodes corresponding to the first touch electrode block 201 and the second touch electrode block 202 also provide a data voltage signal through the data lines connected thereto, so that the voltage difference between the two is zero, if the areas where the first touch electrode block 201 and the second touch electrode block 202 are located are changed from a bright state to a dark state, it indicates that the entire second touch signal line 102 and the portion 10b between the connection hole 30 of the first touch signal line 101 and the second test control unit are normal, and there is no problem of wire breakage.
Through the steps, whether the whole touch signal line has the problem of disconnection can be detected, if the problem of disconnection does not exist, the next process can be normally carried out, for example, the later assembly of the module is carried out; if the problem of wire breakage exists, scrapping or other treatment is carried out to prevent the touch panel from continuously entering the next process, waste of later-stage module materials is avoided, and therefore in the manufacturing process of the touch display device, poor interception in the panel manufacturing stage is achieved, waste of later-stage module materials is reduced, and the product yield is improved.
After the detection step is completed, when touch detection or image display is subsequently required, the third switching device T13 is in an off state.
The invention also provides a touch display device, which comprises the touch display panel provided by the embodiment of the invention, wherein the touch display panel comprises a plurality of test routing groups positioned in a non-display area, each test routing group connects two corresponding touch electrode blocks in series through a touch signal line, and each test routing group comprises a first test control unit positioned on one side of the touch signal line, which is far away from the integrated circuit, and a third switch device positioned on one side of the touch signal line, which is near to the integrated circuit. The first test control unit comprises a first switch device, a second switch device, a first input end and a second input end, one end of a first touch signal line is connected with the first input end through the first switch device, and one end of a second touch signal line is connected with the second input end through the second switch device; meanwhile, the other ends of the first touch signal line and the second touch signal line are connected in series through a third switching device. During testing, different voltages are input to the first input end and the second input end, and the first switch device, the second switch device and the third switch device are controlled to be turned on and turned off, so that the problem that whether the whole touch signal line is broken can be sequentially detected, in the manufacturing process of the touch display device, poor interception in the panel manufacturing stage is realized, the waste of later-stage module materials is reduced, and the product yield is improved.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (9)
1. A touch display panel, comprising:
a substrate including a display region and a non-display region;
the touch electrode blocks are arranged in a matrix manner and are positioned in the display area;
the touch signal lines are used for connecting the corresponding touch electrode blocks with the integrated circuit positioned in the non-display area;
the plurality of test wiring groups are positioned in the non-display area, and each test wiring group connects two corresponding touch electrode blocks together in series through the touch signal line;
each test wiring group comprises a first test control unit and a second test control unit;
the first test control unit comprises a first switch device, a second switch device, a first input end and a second input end, and the touch signal lines comprise a first touch signal line and a second touch signal line;
the first input end is connected with the first touch signal line through the first switch device;
the second input end is connected with the second touch signal line through the second switch device;
the second test control unit comprises a third switching device, and the first touch signal line and the second touch signal line are connected in series through the third switching device;
when the touch signal line is detected, a common voltage signal or a data voltage signal is provided for the input ends of the first switch device and the second switch device through the first input end and the second input end in a time-sharing mode, and the common voltage signal is different from the data voltage signal.
2. The touch display panel of claim 1, wherein the first test control unit is located in the non-display area of the touch signal line on a side away from the integrated circuit;
the second test control unit is located in the non-display area of the touch signal line close to one side of the integrated circuit.
3. The touch display panel of claim 2, wherein the first test control unit further comprises: the first control signal input end is connected with the control end of the first switching device;
and the second control signal input end is connected with the control end of the second switching device.
4. The touch display panel according to claim 3, wherein the first and second switching devices are thin film transistors, and control terminals of the first and second switching devices are gates of the thin film transistors.
5. The touch display panel of claim 1, wherein the second test control unit further comprises: and the third control signal input end is connected with the control end of the third switching device.
6. The touch display panel according to claim 5, wherein the third switching device is a thin film transistor, and a control terminal of the third switching device is a gate of the thin film transistor.
7. The touch display panel according to claim 5, wherein the touch electrode block includes a first touch electrode block connected to the first touch signal line, and a second touch electrode block connected to the second touch signal line;
the first touch electrode block and the second touch electrode block are located on the same row and are arranged adjacently.
8. The touch display panel of claim 2, wherein the integrated circuit is disposed between the second test control unit and the touch signal line.
9. A touch display device, characterized in that the touch display device comprises the touch display panel according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN106707575B (en) * | 2017-03-20 | 2020-03-10 | 厦门天马微电子有限公司 | Liquid crystal display panel and test method thereof |
| CN108845702B (en) * | 2018-06-28 | 2021-12-28 | 武汉华星光电技术有限公司 | Touch display panel, test method thereof and touch display device |
| TWI677812B (en) * | 2018-11-01 | 2019-11-21 | 友達光電股份有限公司 | Touch display panel |
| CN110716665B (en) | 2019-09-30 | 2021-09-17 | 厦门天马微电子有限公司 | Touch display panel and display device |
| CN111078054B (en) * | 2019-12-20 | 2023-07-07 | 京东方科技集团股份有限公司 | Touch detection device, control method thereof and display module |
| CN112485940B (en) * | 2020-12-07 | 2022-05-24 | 武汉天马微电子有限公司 | Touch display substrate, test method thereof, liquid crystal display panel and display device |
| CN113485584B (en) * | 2021-07-27 | 2022-11-01 | 武汉华星光电半导体显示技术有限公司 | Touch display device and test method thereof |
| CN113849086B (en) * | 2021-09-28 | 2023-09-26 | 武汉华星光电半导体显示技术有限公司 | Touch display panel and display device |
| US11906835B2 (en) | 2021-09-28 | 2024-02-20 | Wuhan China Optoelectronics Semiconductor Display Technology Co., Ltd. | Touch display panel and display device |
| CN113867569A (en) * | 2021-09-29 | 2021-12-31 | 上海天马微电子有限公司 | Touch panel, detection method thereof and display device |
| CN114664251B (en) * | 2022-04-21 | 2023-07-21 | 合肥鑫晟光电科技有限公司 | Display panel, driving method and related equipment |
| CN115602082A (en) * | 2022-09-13 | 2023-01-13 | 友达光电（昆山）有限公司（Cn） | Display panel and method for manufacturing the same |
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