WO2017059613A1 - 触控显示面板及其触控电路 - Google Patents

触控显示面板及其触控电路 Download PDF

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Publication number
WO2017059613A1
WO2017059613A1 PCT/CN2015/093597 CN2015093597W WO2017059613A1 WO 2017059613 A1 WO2017059613 A1 WO 2017059613A1 CN 2015093597 W CN2015093597 W CN 2015093597W WO 2017059613 A1 WO2017059613 A1 WO 2017059613A1
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Prior art keywords
touch
line
gate
source
array
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Ceased
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PCT/CN2015/093597
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English (en)
French (fr)
Inventor
杜鹏
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TCL China Star Optoelectronics Technology Co Ltd
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Shenzhen China Star Optoelectronics Technology Co Ltd
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Priority to US14/897,676 priority Critical patent/US10303283B2/en
Publication of WO2017059613A1 publication Critical patent/WO2017059613A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/04164—Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0446—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/047—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using sets of wires, e.g. crossed wires
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3648—Control of matrices with row and column drivers using an active matrix
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; 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
    • G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
    • G06F3/04184—Synchronisation with the driving of the display or the backlighting unit to avoid interferences generated internally
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0421—Structural details of the set of electrodes
    • G09G2300/043—Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3685—Details of drivers for data electrodes
    • G09G3/3688—Details of drivers for data electrodes suitable for active matrices only

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a touch circuit, and to a touch display panel having the touch circuit.
  • touch screen As an input medium, touch screen is the most simple, convenient and natural human-computer interaction method. Therefore, touch screens are increasingly being applied to various electronic products.
  • the touch screen In order to reduce the cost of various electronic devices and make electronic devices thinner and lighter, the touch screen is usually integrated in a liquid crystal display panel, such as a common In-cell touch display panel.
  • a liquid crystal display panel such as a common In-cell touch display panel.
  • a pixel structure with a touch function of an In-Cell type touch display panel since a metal layer needs to be added to form a touch driving signal line and a touch sensing signal line, it is required to be in a conventional liquid crystal.
  • a pixel layer, an inorganic insulating layer and corresponding two masks are added to the pixel structure of the display panel. Such a setting greatly increases the manufacturing cost of the In-Cell type touch display panel.
  • the technical problem to be solved by the present invention is that when manufacturing a prior art In-Cell type touch display panel, it is necessary to add a metal layer for forming a touch driving signal line and a touch sensing signal line, and correspondingly
  • the inorganic insulating layer and the two masks greatly increase the manufacturing cost of the In-Cell type touch display panel.
  • the present invention provides an In-Cell type touch display panel with low manufacturing cost and a touch circuit thereof.
  • a touch circuit comprising:
  • a second shorting bar on which is disposed a second connection line for introducing a source test signal during the test phase, wherein all Or a part of the second connection line is configured to receive a touch sensing signal during a touch phase;
  • a fourth shorting bar on which a fourth connecting line for introducing a gate test signal during the testing phase is disposed, wherein all or part of the fourth connecting line is used to introduce a touch driving signal during the touch phase;
  • a source transistor switch array a gate of the source transistor is connected to the first connection line, and the second connection is performed by a source and a drain of the source transistor under the action of the source control signal a line is connected to the data line of the touch display panel;
  • a gate transistor switch array having a gate of a gate transistor connected to the third connection line and transmitting the fourth connection through a source and a drain of the gate transistor under the action of the gate control signal
  • the line is in communication with the scan line of the touch display panel.
  • the source control signal causes all source transistors in the source transistor switch array to be turned off, the data line is in communication with the data line driving circuit; and, the gate control The signal causes all of the gate transistors in the gate transistor switch array to be turned off, the scan lines being in communication with the scan line drive circuit.
  • the source transistor switch array is a thin film field effect transistor array or a metal-oxide semiconductor field effect transistor array
  • the gate transistor switch array is a thin film field effect transistor array or a metal-oxide semiconductor field effect transistor. Array.
  • the touch circuit is disposed in the same layer and insulated from the data line.
  • the touch circuit is disposed in the same layer and insulated from the scan line.
  • a touch display panel including:
  • each of the sub-pixel units is provided with a thin film transistor
  • a second shorting bar on which is disposed a second connecting line for introducing a source test signal during the testing phase, wherein all or part of the second connecting line is used to receive the touch sensing signal during the touch phase;
  • a fourth shorting bar on which a fourth connecting line for introducing a gate test signal during the testing phase is disposed, wherein all or part of the fourth connecting line is used to introduce a touch driving signal during the touch phase;
  • a source transistor switch array a gate of the source transistor is connected to the first connection line, and the second connection is performed by a source and a drain of the source transistor under the action of the source control signal a line connected to the data line;
  • a gate transistor switch array having a gate of a gate transistor connected to the third connection line and transmitting the fourth connection through a source and a drain of the gate transistor under the action of the gate control signal A line is in communication with the scan line.
  • the source control signal causes all source transistors in the source transistor switch array to be turned off, the data line is in communication with the data line driving circuit; and, the gate control The signal causes all of the gate transistors in the gate transistor switch array to be turned off, the scan lines being in communication with the scan line drive circuit.
  • the source transistor switch array is a thin film field effect transistor array or a metal-oxide semiconductor field effect transistor array
  • the gate transistor switch array is a thin film field effect transistor array or a metal-oxide semiconductor field effect transistor. Array.
  • the touch circuit is disposed in the same layer and insulated from the data line.
  • the touch circuit is disposed in the same layer and insulated from the scan line.
  • the invention redesigns the test signal line and the touch signal line without changing the traditional pixel structure, so that the formed touch circuit has both a test function and a touch detection function.
  • the touch circuit can be disposed in the same layer as the scan line, insulated, or in the same layer as the data line, so that no additional metal layer is needed to form the touch circuit.
  • it is required to add a metal layer for forming a touch circuit, and a corresponding inorganic insulating layer and two photomasks.
  • the utility model effectively reduces the manufacturing cost of the In-Cell type touch display device, simplifies the manufacturing process, and improves the yield of the touch display panel.
  • FIG. 1 is a schematic structural view of a touch display panel according to an embodiment of the present invention.
  • FIG. 2 is a schematic view showing the touch display panel of the embodiment of the present invention when it is in a display state
  • FIG. 3 is a schematic diagram of a touch display panel in a touch state according to an embodiment of the invention.
  • FIG. 4 is a schematic diagram showing the control timing of the touch display panel in the embodiment of the present invention.
  • the technical problem to be solved by the present invention is that when manufacturing a prior art In-Cell type touch display panel, it is necessary to add a metal layer for forming a touch driving signal line and a touch sensing signal line, and correspondingly The inorganic insulating layer and the two masks greatly increase the manufacturing cost of the In-Cell type touch display panel.
  • an embodiment of the present invention provides an In-Cell type touch display panel with low manufacturing cost and a touch circuit thereof.
  • FIG. 1 is a schematic structural diagram of a touch display panel according to an embodiment of the present invention.
  • the touch display panel includes a shorting bar, a source transistor switch array 305 , a gate transistor switch array 306 , a plurality of scan lines 200 , a plurality of data lines 100 , and sub-pixel units divided by the scan lines 200 and the data lines 100 .
  • the data lines 100 are vertically arranged, and their numbers in FIG. 1 are D(n), D(n+1), ..., D(n+11).
  • the scanning lines 200 are horizontally arranged, and their numbers in FIG. 1 are sequentially G(n), G(n+1), ..., G(n+7).
  • a thin film transistor (TFT) is disposed in each sub-pixel unit.
  • Each of the measuring points 1 to 10 passes through a trace (or a connecting line) on the shorting bar and is connected to the data line 100 and the scanning line 200 of the touch display panel through the digital switch array.
  • the data switch array is preferably a thin film field effect transistor (TFT) array or a metal-oxide semiconductor field effect transistor (MOSFET) array.
  • the measuring points 1 to 5 pass through a first connecting line (not shown) on the two first shorting bars 301 and a second connecting line 3021 on the three second shorting bars 302 and pass through the source transistor switch.
  • the array 305 is connected to the data line 100 of the touch display panel.
  • the source transistor switch array 305 is composed of a plurality of source transistors.
  • the measuring point 1 and the measuring point 2 are connected to the gate of the source transistor of the source transistor switching array 305 via a first connecting line.
  • the measuring point 3 to the measuring point 5 are connected to the drain of the source transistor through the second connecting line 3021, and the source of the source transistor is connected to the data line 100 of the touch display panel.
  • the first connection line is used to introduce a source control signal to control the turn-on and turn-off of the source transistor.
  • the second connection line 3021 is configured to introduce a source test signal during the test phase, wherein all or part of the second connection line 3021 is further configured to receive the touch sensing signal during the touch phase.
  • gate transistor switch array 306 is comprised of a plurality of gate transistors.
  • the measuring points 6 to 10 pass through a third connecting line (not shown) on the two third shorting bars 303 and a fourth connecting line 3041 on the three fourth shorting bars 304 and are connected by the gate transistor switch array 306. Go to the scan line 200 of the touch display panel.
  • the measuring point 6 and the measuring point 7 are connected to the gate of the gate transistor of the gate transistor switch array 306 through a third connecting line.
  • the measuring point 8 to the measuring point 10 are connected to the drain of the gate transistor through the fourth connecting line 3041, and the source of the gate transistor is connected to the scanning line 200 of the touch display panel.
  • the third connection line is used to reference the gate control signal to control the turn-on and turn-off of the gate transistor close.
  • the fourth connection line 3041 is used to introduce a gate test signal during the test phase, wherein all or part of the fourth connection line 3041 is further used to introduce a touch drive signal during the touch phase.
  • both the measuring point 3 and the measuring point 4 can be connected to the data line 100 through two source transistors, and the measuring point 5 can be connected to the data line 100 through eight source transistors.
  • Both the measuring point 8 and the measuring point 9 can be connected to the scanning line 200 through two gate transistors, and the measuring point 10 can be connected to the scanning line 200 through four gate transistors.
  • a high level is input to the measuring points 1, 2, 6, and 7, thereby controlling all of the source transistors and all the gate transistors to be turned on. Then, the touch display panel can be tested by loading the signals required for the test from the measuring point 3 to the measuring point 5 and the measuring point 8 to the measuring point 10 respectively.
  • the test result shows that the touch display panel is normal, input low level to the measuring points 1, 2, 6, and 7, so that the data line 100 in the display area can be disconnected from the shorting bar.
  • the resulting panel needs to perform the final module binding process.
  • the scan lines 200 and the data lines 100 inside the display area are respectively connected to the corresponding drive circuits. That is, the scanning line 200 is connected to the scanning line driving circuit, and the data line 100 is connected to the data line driving circuit.
  • the first connection line and the third connection line for introducing the control signal may be connected to the driving circuit or to the circuit for inputting the touch signal. This can be chosen according to the specific design needs.
  • the signals set on the shorting bars are classified into two types.
  • the first type is a connection line for transmitting only test signals during the test, such as the connection line involved in the measurement point 5 and the connection line involved in the measurement point 10.
  • connection line for transmitting a test signal and for transmitting a touch signal
  • a connection line involved in the measurement point 3 and the measurement point 4 and a connection line involved in the measurement point 8 and the measurement point 9.
  • Such a connection line can be connected to a circuit for inputting a test signal or to a circuit for inputting a touch signal.
  • control signal and the test signal are provided through a bonding pad on the periphery of the panel before the bonding process is performed on the touch display panel.
  • FIG. 2 is a schematic view showing the touch display panel of the embodiment of the present invention operating in a display state.
  • a low level is input to each of the measuring points 1, 2, 6, and 7, so that all of the source transistors and all of the gate transistors are turned off.
  • the data line 100 is in communication with a data line driving circuit (not shown), and the scanning line 200 is connected to a scanning line driving circuit (not shown), and then the panel is normally displayed in accordance with a conventional control method.
  • the gray portion in Figure 2 represents the circuit in a floating or grounded state.
  • the non-touch source transistors related to the second connection line 3021 that does not receive the touch sensing signal are turned off, and the rest are used to receive the touch sensing signal.
  • Two connection lines 3021 are involved The source transistors for touch are turned on.
  • the non-touch gate transistors involved in the fourth connection line 3041 that does not introduce the touch driving signal are all turned off, and the remaining touch gates used in the fourth connection line 3041 for introducing the touch driving signal are used. The transistors are all turned on.
  • a low potential (for example, -8 V) is input to the gate of the non-touch source transistor via the first connection line to turn off the non-touch source transistor.
  • a high level (for example, 33 V) is input to the gate of the source transistor for touch through the first connection line to turn on the source transistor for touch.
  • a low potential is input to the gate of the non-touch gate transistor via the third connection line to turn off the non-touch gate transistor.
  • a high level is input to the gate of the gate transistor for touch through the third connection line to turn on the gate transistor for touch.
  • the touch display panel when the touch display panel is in the touch phase, a high level is input to the measuring point 1 and the measuring point 6, and a high level is input to the measuring point 2 and the measuring point 7.
  • the data lines 100 numbered D(n+2), D(n+5), D(n+8), and D(n+11) are set as the touch sense for receiving the touch sensing signals, respectively.
  • Signal line RX signal line
  • the scanning lines 200 numbered G(n+1), G(n+3), G(n+5) and G(n+7) are respectively used as touch driving signal lines for introducing a touch driving signal. (TX signal line).
  • TX signal line In addition, during the touch phase, all transistors in the display area are turned off, so that the touch detection action does not affect the display effect of the panel.
  • TX signal lines and RX signal lines are arranged perpendicular to each other, and the overlapping areas thereof are the touch sensing modules of the transmissive capacitive touch, as shown in area A in FIG. .
  • the size of this area is about 5 to 6 mm.
  • FIG. 3 is only a schematic diagram, and the actual number of TX signal lines and RX signal lines needs to be determined according to the pixel size.
  • the capacitance between the TX signal line and the RX signal line is a parasitic capacitance formed by overlapping portions of the data line 100 and the scan line 200 in the conventional panel.
  • FIG. 4 is a schematic diagram showing the control timing of the touch display panel in the embodiment of the present invention.
  • a control cycle (a time period of one frame of a picture) is divided into two parts: a display phase (LCD working time period) and a touch phase.
  • the waveforms of the scan line 200 and the data line 100 are identical to those of the conventional TFT-LCD.
  • a touch phase a high-frequency sine wave is input to the TX signal line, and its center value is the same as that of the other scan lines 200 (both -8V), and its amplitude is 2V.
  • the setting is such that the maximum peak voltage of the high-frequency sine wave input to the TX signal line is -6V, and this voltage can still turn off the thin film transistor inside the pixel, thereby not affecting the display effect of the panel.
  • the RX signal line is placed in a grounded state or a Vcom voltage is input thereto. Due to the capacitive coupling, a small amplitude sine wave is generated on the RX signal line with a center value of Vcom(V) and a maximum peak voltage of X(V). However, since all of the thin film transistors inside the pixel are turned off, the voltage on the RX signal line is not written to the pixel electrode.
  • the touch display panel of the embodiment of the invention redesigns the test signal line and the touch signal line without changing the conventional pixel structure, so that the formed touch circuit has both a test function and a touch detection function.
  • Touch circuit It can be disposed in the same layer as the scan line 200, insulated, or in the same layer as the data line 100, so that no additional metal layer is needed to form the touch circuit.
  • a metal layer for forming a touch circuit, and a corresponding inorganic insulating layer and two photomasks are required, and the present invention is implemented. For example, on the basis of effectively reducing the manufacturing cost of the In-Cell type touch display device, the manufacturing process is simplified, and the yield of the touch display panel is improved.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • Computer Hardware Design (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Liquid Crystal (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)
  • Position Input By Displaying (AREA)

Abstract

一种触控显示面板及其触控电路。在不改变传统像素结构的基础上重新设计测试信号线和触控信号线，使得形成的触控电路既具有测试功能又具有触控检测功能。因此在有效减少了In-Cell式触控显示装置的制造成本的基础上，简化了制造工艺，提高了触控显示面板的良品率。

Description

触控显示面板及其触控电路
本申请要求享有2015年10月10日提交的名称为“触控显示面板及其触控电路”的中国专利申请CN201510655463.6的优先权，其全部内容通过引用并入本文中。
技术领域
本发明涉及显示技术领域，尤其涉及一种触控电路，还涉及具有该触控电路的触控显示面板。
背景技术
触控屏作为一种输入媒介，是目前最为简单、方便、自然的人机交互方式。因此，触控屏越来越多地应用到各种电子产品中。为降低各种电子设备的成本、使电子设备更轻薄，通常触控屏集成于液晶显示面板中，例如常见的In-cell式触控显示面板。在设计In-Cell式触控显示面板时，通常需要增加额外的层别来制作触控感测电路。具体地，在制造In-Cell式触控显示面板的带触控功能的像素结构时，由于需要增加一层金属层来形成触控驱动信号线和触控感测信号线，因此需要在传统液晶显示面板的像素结构的基础上增加一层金属层、一层无机绝缘层和对应的两张光罩。如此设置会大大增加In-Cell式触控显示面板的制造成本。
因此，亟需一种能够有效降低In-Cell式触控显示面板的制造成本的技术方案。
发明内容
本发明所要解决的技术问题是：在制造现有技术的In-Cell式触控显示面板时，需要增加一层用于形成触控驱动信号线和触控感测信号线的金属层、以及相应的无机绝缘层和两张光罩，这样会大大增加In-Cell式触控显示面板的制造成本。
为了解决上述技术问题，本发明提供了一种制造成本低的In-Cell式触控显示面板及其触控电路。
根据本发明的一个方面，提供了一种触控电路，其包括：
第一短路棒，其上设置有用于引入源极控制信号的第一连接线；
第二短路棒，其上设置有用于在测试阶段引入源极测试信号的第二连接线，其中全部 或部分所述第二连接线用于在触控阶段接收触控感测信号；
第三短路棒，其上设置有用于引入栅极控制信号的第三连接线；
第四短路棒，其上设置有用于在测试阶段引入栅极测试信号的第四连接线，其中全部或部分所述第四连接线用于在触控阶段引入触控驱动信号；
源极晶体管开关阵列，其源极晶体管的栅极连接所述第一连接线，并在所述源极控制信号的作用下通过所述源极晶体管的源极、漏极将所述第二连接线与所述触控显示面板的数据线相连通；以及
栅极晶体管开关阵列，其栅极晶体管的栅极连接所述第三连接线，并在所述栅极控制信号的作用下通过所述栅极晶体管的源极、漏极将所述第四连接线与所述触控显示面板的扫描线相连通。
优选的是，在显示阶段，所述源极控制信号使得所述源极晶体管开关阵列中的所有源极晶体管都关闭，所述数据线与数据线驱动电路相连通；并且，所述栅极控制信号使得所述栅极晶体管开关阵列中的所有栅极晶体管都关闭，所述扫描线与扫描线驱动电路相连通。
优选的是，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
优选的是，所述触控电路与所述数据线同层且绝缘设置。
优选的是，所述触控电路与所述扫描线同层且绝缘设置。
根据本发明的另一个方面，提供了一种触控显示面板，其包括：
扫描线、数据线及由所述扫描线和所述数据线划分成的子像素单元阵列，每个所述子像素单元中设置有薄膜晶体管；
第一短路棒，其上设置有用于引入源极控制信号的第一连接线；
第二短路棒，其上设置有用于在测试阶段引入源极测试信号的第二连接线，其中全部或部分所述第二连接线用于在触控阶段接收触控感测信号；
第三短路棒，其上设置有用于引入栅极控制信号的第三连接线；
第四短路棒，其上设置有用于在测试阶段引入栅极测试信号的第四连接线，其中全部或部分所述第四连接线用于在触控阶段引入触控驱动信号；
源极晶体管开关阵列，其源极晶体管的栅极连接所述第一连接线，并在所述源极控制信号的作用下通过所述源极晶体管的源极、漏极将所述第二连接线与所述数据线相连通；以及
栅极晶体管开关阵列，其栅极晶体管的栅极连接所述第三连接线，并在所述栅极控制信号的作用下通过所述栅极晶体管的源极、漏极将所述第四连接线与所述扫描线相连通。
优选的是，在显示阶段，所述源极控制信号使得所述源极晶体管开关阵列中的所有源极晶体管都关闭，所述数据线与数据线驱动电路相连通；并且，所述栅极控制信号使得所述栅极晶体管开关阵列中的所有栅极晶体管都关闭，所述扫描线与扫描线驱动电路相连通。
优选的是，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
优选的是，所述触控电路与所述数据线同层且绝缘设置。
优选的是，所述触控电路与所述扫描线同层且绝缘设置。
与现有技术相比，上述方案中的一个或多个实施例可以具有如下优点或有益效果：
本发明在不改变传统像素结构的基础上重新设计测试信号线和触控信号线，使得形成的触控电路既具有测试功能又具有触控检测功能。触控电路既可以和扫描线同层、绝缘设置，也可以和数据线同层、绝缘设置，从而无需增加一层额外的金属层来形成触控电路。相比于现有技术中在制造In-Cell式触控显示装置时需要增加一层用于形成触控电路的金属层、以及相应的无机绝缘层和两张光罩的技术方案，本发明在有效减少了In-Cell式触控显示装置的制造成本的基础上，简化了制造工艺，提高了触控显示面板的良品率。
本发明的其它特征和优点将在随后的说明书中阐述，并且部分地从说明书中变得显而易见，或者通过实施本发明而了解。本发明的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本发明的进一步理解，并且构成说明书的一部分，与本发明的实施例共同用于解释本发明，并不构成对本发明的限制。在附图中：
图1示出了本发明实施例触控显示面板的结构示意图；
图2示出了本发明实施例触控显示面板工作于显示状态时的示意图；
图3示出了本发明实施例触控显示面板工作于触控状态时的示意图；以及
图4示出了本发明实施例触控显示面板工作时的控制时序示意图。
具体实施方式
以下将结合附图及实施例来详细说明本发明的实施方式，借此对本发明如何应用技术手段来解决技术问题，并达成技术效果的实现过程能充分理解并据以实施。需要说明的是，只要不构成冲突，本发明中的各个实施例以及各实施例中的各个特征可以相互结合，所形成的技术方案均在本发明的保护范围之内。
本发明所要解决的技术问题是：在制造现有技术的In-Cell式触控显示面板时，需要增加一层用于形成触控驱动信号线和触控感测信号线的金属层、以及相应的无机绝缘层和两张光罩，这样会大大增加In-Cell式触控显示面板的制造成本。为了解决上述技术问题，本发明实施例提供了一种制造成本低的In-Cell式触控显示面板及其触控电路。
如图1所示，是本发明实施例的触控显示面板的结构示意图。参照图1，触控显示面板包括短路棒、源极晶体管开关阵列305、栅极晶体管开关阵列306、若干扫描线200、若干数据线100以及由扫描线200和数据线100划分成的子像素单元阵列。其中，数据线100垂直排列，其在图1中的编号依次为D(n),D(n+1),……,D(n+11)。扫描线200水平排列，其在图1中的编号依次为G(n),G(n+1),……,G(n+7)。每个子像素单元中设置有薄膜晶体管(TFT)。
各测点1至10经过短路棒(Shorting Bar)上的走线(或者说连接线)并通过数字开关阵列而连接到触控显示面板的数据线100和扫描线200上。这里，数据开关阵列优选为薄膜场效应晶体管(TFT)阵列或者金属-氧化物半导体场效应晶体管(MOSFET)阵列。
具体地，测点1至5经过两条第一短路棒301上的第一连接线(图中未示出)和三条第二短路棒302上的第二连接线3021、并通过源极晶体管开关阵列305连接到触控显示面板的数据线100上。具体地，源极晶体管开关阵列305由多个源极晶体管组成。测点1和测点2经过第一连接线连接到源极晶体管开关阵列305的源极晶体管的栅极上。测点3至测点5通过第二连接线3021连接源极晶体管的漏极，而源极晶体管的源极连接触控显示面板的数据线100。第一连接线用于引入源极控制信号，以控制源极晶体管的导通与关闭。第二连接线3021用于在测试阶段引入源极测试信号，其中全部或者部分第二连接线3021还用于在触控阶段接收触控感测信号。
类似地，栅极晶体管开关阵列306由多个栅极晶体管组成。测点6至10经过两条第三短路棒303上的第三连接线(图中未示出)和三条第四短路棒304上的第四连接线3041、并通过栅极晶体管开关阵列306连接到触控显示面板的扫描线200上。具体地，测点6和测点7通过第三连接线连接到栅极晶体管开关阵列306的栅极晶体管的栅极上。测点8至测点10通过第四连接线3041连接栅极晶体管的漏极，而栅极晶体管的源极连接触控显示面板的扫描线200。第三连接线用于引用栅极控制信号，以控制栅极晶体管的导通与关 闭。第四连接线3041用于在测试阶段引入栅极测试信号，其中全部或者部分第四连接线3041还用于在触控阶段引入触控驱动信号。
值得注意的是，可根据实际情况(例如根据需要引入触控驱动/感测信号的信号线数目)给触控显示面板的数据线100和扫描线200分配不同数量的晶体管开关和测点进行点灯测试。例如，参照图1，测点3和测点4均可通过两个源极晶体管连接数据线100，测点5可通过八个源极晶体管连接数据线100。测点8和测点9均可通过两个栅极晶体管连接扫描线200，测点10可通过四个栅极晶体管连接扫描线200。
在触控显示面板工作于测试阶段时，参照图1，向测点1、2、6和7输入高电平，从而控制所有源极晶体管和所有栅极晶体管都导通。然后向测点3至测点5以及测点8至测点10分别加载测试需要的信号就可以对触控显示面板进行测试了。当测试结果显示触控显示面板显示正常时，向测点1、2、6和7输入低电平，这样显示区内的数据线100就能够和短路棒断开连接了。
测试完成之后，产出的面板需要进行最后的模组绑定工序。在绑定工序完成之后，显示区内部的扫描线200和数据线100分别和相应的驱动电路连接。即，扫描线200与扫描线驱动电路连接，数据线100与数据线驱动电路连接。在本实施例中，用于引入控制信号的第一连接线和第三连接线既可以和驱动电路连接，也可以和用于输入触控信号的电路连接。这可根据具体的设计需要来进行选择。在本实施例中，短路棒上设置的信号分为两类。第一类是在测试过程中仅用于传送测试信号的连接线，例如测点5涉及的连接线和测点10涉及的连接线。这类连接线不与任何电路相连，在绑定工序完成后处于浮空(Floating)状态。第二类是既用于传送测试信号，又用于传送触控信号的连接线，例如测点3和测点4涉及的连接线，以及测点8和测点9涉及的连接线。这类连接线可与用于输入测试信号的电路或者与用于输入触控信号的电路连接。
值得注意的是，在未对触控显示面板进行绑定(Bonding)工序之前，上述控制信号及测试信号通过面板外围的绑定垫(Bonding Pad)提供。
图2示出了本发明实施例触控显示面板工作于显示状态时的示意图。参照图2，在触控显示面板工作于显示阶段时，向测点1、2、6和7都输入低电平，以使所有源极晶体管和所有栅极晶体管都关闭。同时数据线100与数据线驱动电路(图中未示出)相连通，扫描线200与扫描线驱动电路(图中未示出)相连通，然后按照传统的控制方式控制面板正常显示。图2中灰色部分代表处于浮空状态或者接地状态的电路。
在触控显示面板工作于触控阶段时，那些不接收触控感测信号的第二连接线3021涉及的非触控用的源极晶体管均关闭，其余用于接收触控感测信号的第二连接线3021涉及 的触控用的源极晶体管都打开。另外，那些不引入触控驱动信号的第四连接线3041涉及的非触控用的栅极晶体管均关闭，其余用于引入触控驱动信号的第四连接线3041涉及的触控用的栅极晶体管都打开。
具体地，经第一连接线向非触控用的源极晶体管的栅极输入低电位(例如-8V)，以使非触控用的源极晶体管关闭。经第一连接线向触控用的源极晶体管的栅极输入高电平(例如33V)，以使触控用的源极晶体管打开。类似地，经第三连接线向非触控用的栅极晶体管的栅极输入低电位，以使非触控的栅极晶体管关闭。经第三连接线向触控用的栅极晶体管的栅极输入高电平，以使触控用的栅极晶体管打开。
参照图3，在触控显示面板工作于触控阶段时，向测点1和测点6输入高电平，向测点2和测点7输入高低平。如此设置使编号为D(n+2),D(n+5),D(n+8)和D(n+11)的数据线100分别作为用于接收触控感测信号的触控感测信号线(RX信号线)。同时使编号为G(n+1),G(n+3),G(n+5)和G(n+7)的扫描线200分别作为用于引入触控驱动信号的触控驱动信号线(TX信号线)。另外，在触控阶段，显示区内的所有晶体管都关闭，以使触控检测动作不会对面板的显示效果造成影响。
在整个触控显示面板的显示区内部，四条TX信号线和四条RX信号线相互垂直排列，它们重叠的区域即为透射电容式触控的触控感测模块，如图3中区域A所示。该区域的尺寸为5～6mm左右。图3仅为示意图，实际的TX信号线和RX信号线的数量需要根据像素尺寸来决定。TX信号线和RX信号线之间的电容即传统面板中数据线100和扫描线200相互重叠部分所形成的寄生电容。
图4示出了本发明实施例触控显示面板工作时的控制时序示意图。参照图4，一个控制周期(一帧画面的时间段)分为两个部分：显示阶段(LCD工作时间段)和触控阶段。在显示阶段，扫描线200和数据线100的波形和传统TFT-LCD是完全相同的。在触控阶段，向TX信号线输入高频的正弦波，其中心值和其他扫描线200相同(均为-8V)，其振幅为2V。如此设置使得向TX信号线输入的高频正弦波的最大峰值电压为-6V，此电压仍然可以使像素内部的薄膜晶体管处于关闭状态，从而不会影响面板的显示效果。仍参照图4，将RX信号线置于接地状态或者向其输入Vcom电压。由于电容耦合的作用，RX信号线上也会相应产生振幅较小的正弦波，其中心值为Vcom(V)，最大峰值电压为X(V)。然而，由于像素内部的所有薄膜晶体管均处于关闭状态，因此RX信号线上的电压并不会写入像素电极。
应用本发明实施例的触控显示面板，在不改变传统像素结构的基础上重新设计测试信号线和触控信号线，使得形成的触控电路既具有测试功能又具有触控检测功能。触控电路 既可以和扫描线200同层、绝缘设置，也可以和数据线100同层、绝缘设置，从而无需增加一层额外的金属层来形成触控电路。相比于现有技术中在制造In-Cell式触控显示装置时需要增加一层用于形成触控电路的金属层、以及相应的无机绝缘层和两张光罩的技术方案，本发明实施例在有效减少了In-Cell式触控显示装置的制造成本的基础上，简化了制造工艺，提高了触控显示面板的良品率。
虽然本发明所公开的实施方式如上，但所述的内容只是为了便于理解本发明而采用的实施方式，并非用以限定本发明。任何本发明所属技术领域内的技术人员，在不脱离本发明所公开的精神和范围的前提下，可以在实施的形式上及细节上作任何的修改与变化，但本发明的保护范围，仍须以所附的权利要求书所界定的范围为准。

Claims (16)

  1. 一种触控显示面板的触控电路，包括：
    第一短路棒，其上设置有用于引入源极控制信号的第一连接线；
    第二短路棒，其上设置有用于在测试阶段引入源极测试信号的第二连接线，其中全部或部分所述第二连接线用于在触控阶段接收触控感测信号；
    第三短路棒，其上设置有用于引入栅极控制信号的第三连接线；
    第四短路棒，其上设置有用于在测试阶段引入栅极测试信号的第四连接线，其中全部或部分所述第四连接线用于在触控阶段引入触控驱动信号；
    源极晶体管开关阵列，其源极晶体管的栅极连接所述第一连接线，并在所述源极控制信号的作用下通过所述源极晶体管的源极、漏极将所述第二连接线与所述触控显示面板的数据线相连通；以及
    栅极晶体管开关阵列，其栅极晶体管的栅极连接所述第三连接线，并在所述栅极控制信号的作用下通过所述栅极晶体管的源极、漏极将所述第四连接线与所述触控显示面板的扫描线相连通。
  2. 根据权利要求1所述的触控电路，其中，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
  3. 根据权利要求1所述的触控电路，其中，所述触控电路与所述数据线同层且绝缘设置。
  4. 根据权利要求1所述的触控电路，其中，所述触控电路与所述扫描线同层且绝缘设置。
  5. 根据权利要求1所述的触控电路，其中，在显示阶段，所述源极控制信号使得所述源极晶体管开关阵列中的所有源极晶体管都关闭，所述数据线与数据线驱动电路相连通；并且，所述栅极控制信号使得所述栅极晶体管开关阵列中的所有栅极晶体管都关闭，所述扫描线与扫描线驱动电路相连通。
  6. 根据权利要求5所述的触控电路，其中，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
  7. 根据权利要求5所述的触控电路，其中，所述触控电路与所述数据线同层且绝缘设置。
  8. 根据权利要求5所述的触控电路，其中，所述触控电路与所述扫描线同层且绝缘 设置。
  9. 一种触控显示面板，包括：
    扫描线、数据线及由所述扫描线和所述数据线划分成的子像素单元阵列，每个所述子像素单元中设置有薄膜晶体管；
    第一短路棒，其上设置有用于引入源极控制信号的第一连接线；
    第二短路棒，其上设置有用于在测试阶段引入源极测试信号的第二连接线，其中全部或部分所述第二连接线用于在触控阶段接收触控感测信号；
    第三短路棒，其上设置有用于引入栅极控制信号的第三连接线；
    第四短路棒，其上设置有用于在测试阶段引入栅极测试信号的第四连接线，其中全部或部分所述第四连接线用于在触控阶段引入触控驱动信号；
    源极晶体管开关阵列，其源极晶体管的栅极连接所述第一连接线，并在所述源极控制信号的作用下通过所述源极晶体管的源极、漏极将所述第二连接线与所述数据线相连通；以及
    栅极晶体管开关阵列，其栅极晶体管的栅极连接所述第三连接线，并在所述栅极控制信号的作用下通过所述栅极晶体管的源极、漏极将所述第四连接线与所述扫描线相连通。
  10. 根据权利要求9所述的触控显示面板，其中，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
  11. 根据权利要求9所述的触控显示面板，其中，所述触控电路与所述数据线同层且绝缘设置。
  12. 根据权利要求9所述的触控显示面板，其中，所述触控电路与所述扫描线同层且绝缘设置。
  13. 根据权利要求9所述的触控显示面板，其中，在显示阶段，所述源极控制信号使得所述源极晶体管开关阵列中的所有源极晶体管都关闭，所述数据线与数据线驱动电路相连通；并且，所述栅极控制信号使得所述栅极晶体管开关阵列中的所有栅极晶体管都关闭，所述扫描线与扫描线驱动电路相连通。
  14. 根据权利要求13所述的触控显示面板，其中，所述源极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列，所述栅极晶体管开关阵列为薄膜场效应晶体管阵列或者金属-氧化物半导体场效应晶体管阵列。
  15. 根据权利要求13所述的触控显示面板，其中，所述触控电路与所述数据线同层且绝缘设置。
  16. 根据权利要求13所述的触控显示面板，其中，所述触控电路与所述扫描线同层且绝缘设置。
PCT/CN2015/093597 2015-10-10 2015-11-02 触控显示面板及其触控电路 Ceased WO2017059613A1 (zh)

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