WO2017000434A1 - 扫描驱动电路的检测方法和检测装置、液晶面板 - Google Patents

扫描驱动电路的检测方法和检测装置、液晶面板 Download PDF

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Publication number
WO2017000434A1
WO2017000434A1 PCT/CN2015/092355 CN2015092355W WO2017000434A1 WO 2017000434 A1 WO2017000434 A1 WO 2017000434A1 CN 2015092355 W CN2015092355 W CN 2015092355W WO 2017000434 A1 WO2017000434 A1 WO 2017000434A1
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Prior art keywords
scan
scan driving
lines
pulse signal
signals
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PCT/CN2015/092355
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English (en)
French (fr)
Inventor
郝思坤
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Wuhan China Star Optoelectronics Technology Co Ltd
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
Shenzhen China Star Optoelectronics Technology Co Ltd
Wuhan China Star Optoelectronics Technology Co Ltd
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Application filed by Shenzhen China Star Optoelectronics Technology Co Ltd, Wuhan China Star Optoelectronics Technology Co Ltd filed Critical Shenzhen China Star Optoelectronics Technology Co Ltd
Priority to US14/889,549 priority Critical patent/US20170186348A1/en
Publication of WO2017000434A1 publication Critical patent/WO2017000434A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • 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
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/04—Structural and physical details of display devices
    • G09G2300/0404—Matrix technologies
    • G09G2300/0408—Integration of the drivers onto the display substrate
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
    • G09G2310/0202—Addressing of scan or signal lines
    • G09G2310/0218—Addressing of scan or signal lines with collection of electrodes in groups for n-dimensional addressing
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2310/00—Command of the display device
    • G09G2310/08—Details of timing specific for flat panels, other than clock recovery
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof

Definitions

  • the present invention relates to the field of liquid crystal panel detection technology, and in particular, to a detection method, a detection device, and a liquid crystal panel of a scan driving circuit.
  • Liquid crystal display is one of the most widely used flat panel displays, and has gradually become a widely used electronic device such as mobile phones, personal digital assistants (PDAs), digital cameras, computer screens or laptop screens with high-resolution color screens. monitor.
  • PDAs personal digital assistants
  • LCDs liquid crystal display
  • LCDs liquid crystal display
  • the GOA circuit is a scan driving circuit for providing scanning signals for scanning lines.
  • GOA Gate driver on array
  • the GOA circuit can be classified into Anorphous silicon (a-Si) GOA, Indium gallium zinc oxide (IGZO) GOA, Low temperature ploy silicon (LTPS) GOA, etc. depending on the type of active device used in the display. Different processes can be used for each GOA circuit.
  • the LTPS process has the advantages of high electron mobility and mature technology, and is currently widely used in small and medium size displays.
  • the liquid crystal display includes a plurality of circuit modules, such as static electricity protection, line multiplexer, shift register (GOA), etc.
  • circuit modules such as static electricity protection, line multiplexer, shift register (GOA), etc.
  • GOA shift register
  • the GOA circuit accounts for the largest proportion, the most complicated circuit, and the most prone to the actual production, so look for a An effective GOA circuit test method is necessary.
  • the technical problem to be solved by the present invention is to provide a detection method and a detection device for a scan driving circuit, and a liquid crystal panel, which can effectively detect the position of a scan driving unit in which an abnormality occurs in the scan driving circuit.
  • a technical solution adopted by the present invention is to provide a scan driver.
  • a method for detecting a circuit comprising a plurality of cascaded scan driving units, the detecting method comprising: controlling a plurality of scan driving units to sequentially provide scan signals to a corresponding one of the plurality of scan lines; detecting and scanning the plurality of scan lines A sequence of pulse signals induced on at least one of the data lines intersecting and capacitively coupled; determining, based on the sequence of pulse signals, a position of the scan drive unit at which the scan drive unit is abnormal.
  • the step of determining, according to the pulse signal sequence, the position of the scan driving unit having the abnormality in the scan driving circuit comprises: determining the number of the pulse signals in the pulse signal sequence; determining that the scan driving unit having the abnormality is in the scan driving circuit according to the number of the pulse signals s position.
  • the step of controlling the plurality of scan driving units to sequentially supply the scan signals to the corresponding one of the plurality of scan lines comprises: controlling the N scan drive units to sequentially provide the scan signals to the N scans in the order from the first strip to the Nth strip. a line, wherein N ⁇ 3; determining, according to the number of pulse signals, the step of the scan driving unit having an abnormality at the position of the scan driving circuit comprises: comparing the number n of the pulse signals with the number N of scan lines, if the number of pulse signals n If the number N of scan lines is smaller than the number N of scan lines, there is an abnormality in the scan driving unit corresponding to the n+1th scan line.
  • the step of controlling the plurality of scan driving units to sequentially supply the scan signals to the corresponding one of the plurality of scan lines comprises: sequentially controlling the N scan drive units to provide scans in the order from the first to the Nth by using the N clock signals. Signaling to N scan lines, where N ⁇ 3; determining, according to the number of pulse signals, the position of the scan drive unit having an abnormality at the position of the scan drive circuit includes comparing the number n of pulse signals with the number N of clock signals, If the number n of the pulse signals is smaller than the number N of the clock signals, there is an abnormality in the scan driving circuit corresponding to the n+1th scanning line.
  • the step of detecting a pulse signal sequence induced on at least one of the data lines intersecting and capacitively coupled to the plurality of scan lines includes: acquiring a pulse signal sequence by a detection terminal electrically connected to a data line intersecting the scan line.
  • the step of detecting a pulse signal sequence induced on at least one data line intersecting and capacitively coupled to the plurality of scan lines includes: acquiring a plurality of pulses by using a plurality of detection terminals electrically connected to the plurality of data lines intersecting the scan lines a signal sequence; the step of determining, by the pulse signal sequence, the position of the scan driving unit at the position of the scan driving circuit comprises: synthesizing a plurality of pulse signal sequences to determine that there is an abnormal sweep The drive unit is in the position of the scan drive circuit.
  • a liquid crystal panel including a scan driving circuit, a plurality of data lines, and a plurality of scan lines
  • the scan driving circuit includes a plurality of cascaded a scan driving unit, the plurality of scan driving units sequentially supply scan signals to corresponding ones of the plurality of scan lines; the plurality of data lines intersect with the plurality of scan lines and are capacitively coupled, and the liquid crystal panel is further disposed to be electrically connected to the at least one data line
  • the detection terminal is configured to output a pulse signal sequence induced by the scan signal on the data line.
  • another technical solution adopted by the present invention is to provide a detecting device for a scan driving circuit, the scan driving circuit comprising a plurality of cascaded scanning driving units, the detecting device comprising a central processing module and waveform detecting a module, the central processing module is configured to control the plurality of scan driving units to sequentially provide scan signals to corresponding ones of the plurality of scan lines, and the waveform detecting module is configured to detect at least one data line intersecting and capacitively coupled with the plurality of scan lines.
  • the central processing module is further configured to determine, according to the pulse signal sequence, the position of the scan driving unit where the abnormality exists in the scan driving circuit.
  • the central processing module is configured to determine the number of pulse signals in the pulse signal sequence and determine the position of the scan driving unit in the scan driving circuit according to the number of the pulse signals.
  • the waveform detecting module is configured to acquire a pulse signal sequence outputted by the detecting terminal electrically connected to a data line intersecting the scan line; or the waveform detecting module is configured to acquire multiple detections of electrical connection of the plurality of data lines intersecting the scan line
  • the plurality of pulse signal sequences output by the terminal, the central processing module is further configured to synthesize the plurality of pulse signal sequences to determine the position of the scan driving unit in the scan driving circuit.
  • the central processing module is configured to control the N scan driving units to sequentially provide scan signals to the N scan lines in the order from the 1st to the Nth, wherein N ⁇ 3; the central processing module is configured to use the number of the pulse signals n Compared with the number N of scan lines, if the number n of pulse signals is smaller than the number N of scan lines, there is an abnormality in the scan driving unit corresponding to the n+1th scan line.
  • the central processing module is configured to sequentially control the N scan driving units to provide scan signals to the N scan lines in the order from the first strip to the Nth strip by using N clock signals, where N ⁇ 3; central processing The module is configured to compare the number n of the pulse signals with the number N of clock signals. If the number n of the pulse signals is smaller than the number N of the clock signals, the scan driving circuit corresponding to the n+1th scan line has an abnormality.
  • the invention has the beneficial effects that the present invention distinguishes the pulse signal sequence induced on at least one data line intersecting and capacitively coupled with the plurality of scan lines by the prior art, and determines that there is an abnormality according to the pulse signal sequence.
  • the position of the scan driving unit at the scan driving circuit can effectively detect the position of the scan driving unit in which the abnormality occurs in the scan driving circuit.
  • FIG. 1 is a schematic structural view of an embodiment of a liquid crystal panel of the present invention
  • FIG. 2 is a flow chart of an embodiment of a method for detecting a scan driving circuit of the present invention
  • FIG. 2a is a schematic structural view of a liquid crystal panel in which only one detecting terminal is disposed in another embodiment of the present invention
  • FIG. 3 is a timing diagram of a pulse signal sequence, a clock signal sequence, and scan signals on each scan line in an embodiment of the present invention
  • FIG. 4 is a schematic diagram of another waveform of a pulse signal sequence in an embodiment of the present invention.
  • FIG. 5 is another schematic structural view of a liquid crystal panel
  • Fig. 6 is a block diagram showing the detecting device of the scan driving circuit of the present invention.
  • FIG. 1 is a schematic structural view of an embodiment of a liquid crystal panel of the present invention.
  • the liquid crystal panel includes a scanning driving circuit 11, a plurality of data lines 12 and the plurality of scanning lines G 1 ⁇ G N.
  • the scan driving circuit includes a plurality of cascaded scan driving units B 1 to B N , and the plurality of scan driving units B 1 to B N sequentially supply scan signals to corresponding ones of the plurality of scan lines G 1 to G N .
  • the plurality of scan driving units B 1 to B N sequentially supply scanning signals to corresponding ones of the plurality of scanning lines G 1 to G N in the order from the first scanning line G 1 to the Nth scanning line G N .
  • the scan driving unit B 1 supplies a scan signal to the scan line G 1
  • the scan drive unit B 2 of the next stage supplies a scan signal to the scan line G 2
  • the scan drive unit B 3 of the next stage supplies the scan line G 3 with a scan. signal, and so on, until the scan driving unit B N scan signal to the scan lines G N.
  • the plurality of data lines 12 intersect the plurality of scan lines G 1 to G N and are capacitively coupled. 1, each of the data lines 12 are all the scan lines intersect with the vertical, and there is a coupling capacitance C gd between the scanning lines and the data lines 12, and thus a plurality of scan lines G 1 ⁇ G N scanning signals through the The coupling capacitor C gd induces a pulse signal sequence on each of the data lines 12.
  • the liquid crystal panel is further provided with a detection terminal 13 electrically connected to at least one data line 12 for outputting a pulse signal sequence induced by the scan signal on the data line 12.
  • the liquid crystal panel may include a plurality of detection terminals 13 correspondingly electrically connected to the ends of the plurality of data lines 12, each of the detection terminals 13 for outputting a pulse sequence signal of the scan signal induced on the corresponding data line 12.
  • the liquid crystal panel may further include only one detecting terminal 13 electrically connected to the end of one data line 12 for outputting a pulse signal sequence induced by the scanning signal on the data line 12.
  • FIG. 2 is a flow chart of an embodiment of a method for detecting a scan driving circuit of the present invention.
  • the scan driving circuit 11 includes a plurality of cascaded scan driving units B 1 to B N , and the detecting method of the scan driving circuit includes the following steps:
  • Step S11 Control a plurality of scan driving units to sequentially provide scan signals to corresponding ones of the plurality of scan lines.
  • the plurality of scan driving units B 1 to B N sequentially supply corresponding ones of the plurality of scanning lines G 1 to G N in the order from the first scanning line G 1 to the Nth scanning line G N .
  • scan signal the scan driving unit. 1 B provides scan signals to the scan lines G 1, and B a scan driving unit 2 to the scan lines of the scan signal G 2, followed by a B scan driving unit 3 to the scan lines G 3 providing a scan signal, and so on, until the scan driving unit B N supplies a scan signal to the scan line G N , when a certain level of scan drive unit B k (k is greater than or equal to 1 and less than or equal to N) abnormal, the level and The scan drive units B k -B N of all stages after this stage will not provide corresponding scan signals to the corresponding scan lines G k - G N .
  • Step S12 detecting a pulse signal sequence induced on at least one data line that intersects and is capacitively coupled to the plurality of scan lines.
  • step S12 a plurality of data lines 12 and the plurality of scan lines G 1 ⁇ G N intersects capacitive coupling.
  • each of the data lines 12 are all the scan lines intersect with the vertical, and there is a coupling capacitance C gd between the scanning lines and the data lines 12, and thus a plurality of scan lines G 1 ⁇ G N scanning signals through the
  • the coupling capacitor C gd induces a pulse signal sequence on each of the data lines 12.
  • the liquid crystal panel is further provided with a detection terminal 13 electrically connected to at least one data line 12 for outputting a pulse signal sequence induced by the scan signal on the data line 12.
  • Step S13 judging the position of the scan driving circuit at the scan driving circuit based on the pulse signal sequence.
  • the liquid crystal panel may include a plurality of detection terminals 13 electrically connected to the ends of the plurality of data lines 12, each of the detection terminals 13 for outputting a scan signal on the corresponding data line 12.
  • An induced pulse sequence signal in this case, the step of detecting a pulse signal sequence induced on at least one of the data lines intersecting and capacitively coupled to the plurality of scan lines comprises: transmitting a plurality of data lines intersecting the scan lines A plurality of detection terminals are connected to acquire a plurality of pulse signal sequences.
  • the step of determining, at the position of the scan driving circuit, the scan driving unit having an abnormality based on the pulse signal sequence includes synthesizing the plurality of pulse signal sequences to determine the position of the scan driving unit in which the scan driving unit has an abnormality.
  • the step of synthesizing the plurality of pulse signal sequences to determine the position of the scan driving unit in the scan driving circuit may be: aligning the plurality of pulse signal sequences, and culling the pulse signal sequence different from most of the pulse signal sequences of the ⁇ , Therefore, the correct pulse signal sequence is screened, and then the position of the scan driving unit in the scan driving circuit is determined according to the correct pulse signal sequence, and, for example, a plurality of pulse signal sequences are integrated to determine that the scan driving unit has an abnormality in the scan driving circuit.
  • the step of the position may further be: determining the number of the pulse signals in the plurality of pulse signal sequences respectively; determining the position of the scan driving unit having the abnormality in the scan driving circuit according to the number of the largest pulse signals.
  • See 2a and 2a are schematic structural views of a liquid crystal panel in which only one detecting terminal is disposed in another embodiment of the present invention.
  • the liquid crystal panel may also be provided with only one detecting terminal 13 electrically connected to the end of one data line 12 for outputting a pulse signal sequence induced by the scanning signal on the data line 12.
  • the step of detecting a pulse signal sequence induced on at least one of the data lines intersecting and capacitively coupled to the plurality of scan lines includes: acquiring a pulse signal through a detection terminal electrically connected to a data line intersecting the scan line sequence.
  • the step of controlling the plurality of scan driving units to sequentially supply the scan signals to the corresponding one of the plurality of scan lines comprises: controlling the N scan drive units to sequentially provide the order from the first to the Nth. Scanning signals to N scan lines, where N ⁇ 3; determining, according to the number of pulse signals, the position of the scan drive unit having an abnormality at the position of the scan drive circuit includes comparing the number n of pulse signals with the number N of scan lines, If the number n of the pulse signals is smaller than the number N of scan lines, there is an abnormality in the scan driving unit corresponding to the n+1th scan line. Please refer to FIG. 3 in further detail. FIG.
  • the pulse signal induced on the data line 12 by the scan signal A 1 on the first scan line G 1 is P 1
  • the pulse signal induced on the data line 12 by the scan signal A 2 on the second scan line G 2 is P 1
  • the pulse signal induced on the data line 12 by the scan signal A n on the nth scan line G n is P n , thereby forming a pulse sequence signal P
  • the pulse signals P 1 ⁇ P n in the pulse signal sequence P The number n is, and the number n of the pulse signals is compared with the number N of scan lines.
  • the number n of the pulse signals is smaller than the number N of scan lines, it is determined that there is an abnormality of the scan driving unit, and it is determined that the n+1th strip is There is an abnormality in the scan driving unit B n+1 corresponding to the scan line.
  • the step of the driving unit sequentially supplying the scan signal to the corresponding one of the plurality of scan lines comprises: sequentially controlling the N scan drive units to provide the scan signals to the N scan lines in the order from the first strip to the Nth strip by using the N clock signals.
  • the step of determining the position of the scan driving unit having the abnormality in the scan driving circuit according to the number of the pulse signals includes: the number of the pulse signals n Compared with the number N of clock signals in the clock signal sequence C, if the number n of pulse signals is smaller than the number N of clock signals, there is an abnormality in the scan driving circuit corresponding to the n+1th scanning line.
  • the pulse signal sequence P is not an ideal square wave waveform, but is an attenuation waveform, as shown in FIG. 4,
  • FIG. 4 is an embodiment of the present invention.
  • FIG. 5 is another schematic structural diagram of the liquid crystal panel.
  • the liquid crystal panel may include a plurality of detecting terminals 13 electrically connected to the ends of the plurality of data lines 12 , each detecting terminal. 13 is used for outputting a pulse sequence signal induced by the scan signal on the corresponding data line 12, and a controllable switch 14 is connected between the data line 12 and the detection terminal 13, and the controllable switch 14 is high at its enable end EN.
  • the level is turned on and the low level is turned off, it is controlled which of the plurality of detecting lines 13 of the plurality of data lines 12 are used, thereby selecting which of the plurality of data lines 12 to acquire the pulse signal sequence.
  • FIG. 6 is a block diagram of the detecting device of the scan driving circuit of the present invention.
  • the scan driving circuit 11 comprises a cascade of a plurality of scan driving unit B 1 ⁇ B N, see specifically described above, the plurality of scan driving unit B 1 ⁇ B N in accordance with a scan from article section lines G 1 to G N of the N scanning lines in sequence to a plurality of scan lines G 1 ⁇ G N a corresponding scan signal, the scan driving unit B 1 provides scan signals to the scan lines G 1, then the next level the scan driving unit B 2 G 2 a scan signal to the scan lines, the scan driving unit B followed by a 3 to scanning line 3 of the scan signal G, and so on, until the scan driving unit B G N N scan lines to provide Scanning signal; when a certain level of scan driving unit B k (k is greater than or equal to 1 and less than or equal to N) is abnormal, the scanning drive units B k to B N of the stage and all stages subsequent to the stage will not be
  • the detecting means comprises a central processing module 21 and the envelope detection module 22, the central processing module 21 for controlling the plurality of scan driving unit B 1 ⁇ B N sequentially to a plurality of scan lines G 1 ⁇ G N scan provides a corresponding signal,
  • the waveform detecting module 22 is configured to detect a pulse signal sequence induced on at least one data line that is intersected and capacitively coupled to the plurality of scan lines, and the central processing module 21 is further configured to determine, according to the pulse signal sequence, that the scan driving unit has an abnormality in the scan driving The location of the circuit.
  • the plurality of data lines 12 intersect the plurality of scan lines G 1 to G N and are capacitively coupled.
  • each of the data lines 12 are all the scan lines intersect with the vertical, and there is a coupling capacitance C gd between the scanning lines and the data lines 12, and thus a plurality of scan lines G 1 ⁇ G N scanning signals through the
  • the coupling capacitor C gd induces a pulse signal sequence on each of the data lines 12.
  • the liquid crystal panel is further provided with a detection terminal 13 electrically connected to at least one data line 12 for outputting a pulse signal sequence induced by the scan signal on the data line 12.
  • the liquid crystal panel may include a plurality of detection terminals 13 electrically connected to the ends of the plurality of data lines 12, each of the detection terminals 13 for outputting a pulse sequence signal induced by the scan signal on the corresponding data line 12,
  • the waveform detecting module 22 detects that the pulse signal sequence induced on the at least one data line 12 intersecting and capacitively coupled to the plurality of scan lines is: the waveform detecting module 22 is electrically connected through the plurality of data lines 12 intersecting the scan lines.
  • the plurality of detecting terminals 13 acquire a plurality of pulse signal sequences, wherein the waveform detecting module 22 and the detecting terminal 13 are both electrically connected.
  • the central processing module 21 determines, based on the pulse signal sequence, the position of the scan driving unit having an abnormality at the scan driving circuit: the central processing module 21 integrates the plurality of pulse signal sequences to determine the position of the scan driving unit in which the scan driving unit has an abnormality.
  • the central processing module 21 synthesizes a plurality of pulse signal sequences to determine that the scan driving unit having an abnormality at the position of the scan driving circuit may be: the central processing module 21 compares the plurality of pulse signal sequences, and rejects most of the pulse signal sequences without The same pulse signal sequence is selected to select the correct pulse signal sequence, and the position of the scan driving unit at the scan driving circuit is determined according to the correct pulse signal sequence, and then, for example, the central processing module 21 synthesizes a plurality of pulse signal sequences.
  • the position of the scan driving circuit in the abnormality of the scan driving circuit may be: the central processing module 21 respectively determines the number of pulse signals in the plurality of pulse signal sequences; and the central processing module 21 determines that there is an abnormal scan according to the maximum number of pulse signals.
  • the drive unit is at the position of the scan drive circuit.
  • the liquid crystal panel may also be provided with only one detecting terminal 13 electrically connected to the end of one data line 12 for outputting a pulse signal sequence induced by the scanning signal on the data line 12.
  • the waveform detecting module 22 detects that the pulse signal sequence induced on the at least one data line intersecting and capacitively coupled to the plurality of scan lines may be: the waveform detecting module 22 is electrically connected through a data line intersecting the scan line. The detection terminal is used to acquire a pulse signal sequence.
  • the central processing module 21 is configured to determine the number of pulse signals in the pulse signal sequence. It is judged based on the number of pulse signals that the position of the scan driving unit in which the scan drive unit is abnormal is present.
  • the central processing module 21 is configured to control the N scan driving units to sequentially provide scan signals to the N scan lines in the order from the 1st to the Nth, wherein N ⁇ 3, the central processing module is used to transmit the pulse signals.
  • the number n is compared with the number N of scan lines. If the number n of pulse signals is smaller than the number N of scan lines, the scan drive unit corresponding to the n+1th scan line has an abnormality.
  • the central processing module 21 controls the plurality of scan driving units to sequentially supply the scan signals to the corresponding one of the plurality of scan lines.
  • the central processing module 21 controls the N scan drive units to sequentially provide the scans in the order from the first to the Nth.
  • the signal is sent to the N scan lines, where N ⁇ 3; the central processing module 21 determines that the position of the scan drive unit in the scan drive circuit is abnormal according to the number of pulse signals: the central processing module 21 sets the number of pulse signals n and the scan line The number N is compared. If the number n of the pulse signals is smaller than the number N of scan lines, the scan driving unit corresponding to the n+1th scan line has an abnormality.
  • first scanning line a scanning signal G A 1 induced on the data lines 12 on the pulse signal A 1 G 2 12 sense the scan signal on the data line 2 is P 1
  • the 2 nd scan line The generated pulse signal is P 2
  • the pulse signal induced on the data line 12 by the scan signal A n on the nth scan line G n is P n , thereby forming a pulse sequence signal P, and the pulse signal P in the pulse signal sequence P
  • the number of 1 to P n is n
  • the number n of pulse signals is compared with the number N of scan lines. If the number n of pulse signals is smaller than the number N of scan lines, it is determined that there is an abnormality of the scan drive unit, and the judgment is There is an abnormality in the scan driving unit B n+1 corresponding to the n+1 scanning lines.
  • the central processing module 21 may further determine, according to the comparison of the pulse signal sequence P and the clock signal sequence C, the position of the scan driving unit that determines the abnormality in the scan driving circuit, as follows:
  • the central processing module 21 controls the plurality of scan driving units to sequentially supply the scan signals to the corresponding one of the plurality of scan lines.
  • the central processing module 21 sequentially controls the N scan drive units by using the N clock signals according to the first to the Nth.
  • the order of the strips provides scan signals to N scan lines, where N ⁇ 3; the central processing module 21 determines that the position of the scan drive unit in the scan drive circuit is abnormal according to the number of pulse signals: the central processing module 21 will pulse signals The number n is compared with the number N of clock signals in the clock signal sequence C, if the number n of pulse signals is smaller than the clock If the number of signals is N, there is an abnormality in the scan driving circuit corresponding to the n+1th scan line.
  • the pulse signal sequence P is not an ideal square wave waveform but an attenuation waveform due to leakage of the display panel itself, as shown in FIG. 4 .
  • the liquid crystal panel may include a plurality of detection terminals 13 electrically connected to the ends of the plurality of data lines 12, each of the detection terminals 13 for outputting a scan signal at a corresponding data line. 12 is induced pulse sequence signal, and a controllable switch 14 is connected between the data line 12 and the detection terminal 13, and the controllable switch 14 is turned on when its enable terminal EN is high level, and is turned off when low level is enabled, so Which of the detection terminals 13 of the plurality of data lines 12 are used is controlled to select which of the plurality of data lines 12 is to be subjected to the above pulse signal sequence.
  • the invention detects the pulse signal sequence induced on at least one data line which is intersected and capacitively coupled with the plurality of scan lines, and determines the position of the scan drive unit in the scan drive circuit according to the pulse signal sequence, thereby being capable of effectively detecting The position of the scan drive unit where an abnormality occurs in the scan drive circuit.

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Abstract

一种扫描驱动电路的检测方法，该扫描驱动电路包括级联的多个扫描驱动单元，该检测方法包括：控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号（S11）；检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列(S12)；根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置(S13)。该检测方法能够有效的检测扫描驱动电路中发生异常的扫描驱动单元的位置。

Description

扫描驱动电路的检测方法和检测装置、液晶面板 【技术领域】
本发明涉及液晶面板检测技术领域，特别是涉及一种扫描驱动电路的检测方法和检测装置、液晶面板。
【背景技术】
液晶显示器是目前使用最广泛的一种平板显示器，已经逐渐成为各种电子设备如移动电话、个人数字助理(PDA)、数字相机、计算机屏幕或笔记本电脑屏幕所广泛应用具有高分辨率彩色屏幕的显示器。随着液晶显示器技术的发展进步，人们对液晶显示器的显示品质，外观设计等提出了更高的要求，低成本和窄边框成为人们追求的目标。
GOA电路是一种扫描驱动电路，用于为扫描线提供扫描信号，GOA(Gate driver on array)具有降低生产成本和窄边框设计的优点，为多种显示器所使用。根据显示器使用的有源器件的种类，GOA电路可以分为Anorphous silicon(a-Si)GOA、Indium gallium zinc oxide(IGZO)GOA、Low temperature ploy silicon(LTPS)GOA等。每种GOA电路又可以使用不同的制程。LTPS制程具有高电子迁移率和技术成熟的优点，目前被中小尺寸显示器广泛使用。
液晶显示器包含多个电路模块，如静电防护、线路复用器、移位寄存器(GOA)等，这些模块中GOA电路占比最大，线路最复杂，实际生产中也最容易出现不良，因此寻找一种有效的GOA电路测试方式很有必要。
【发明内容】
本发明主要解决的技术问题是提供一种扫描驱动电路的检测方法和检测装置、液晶面板，能够有效的检测扫描驱动电路中发生异常的扫描驱动单元的位置。
为解决上述技术问题，本发明采用的一个技术方案是：提供一种扫描驱动 电路的检测方法，该扫描驱动电路包括级联的多个扫描驱动单元，该检测方法包括：控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号；检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列；根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。
其中，根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：判断脉冲信号序列中的脉冲信号的数目；根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置。
其中，控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：控制N个扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则第n+1条扫描线所对应的扫描驱动单元存在异常。
其中，控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：利用N个时钟信号依次控制N个扫描驱动单元按照从第1条到第N条的顺序提供扫描信号给N条扫描线，其中N≥3；根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置的的步骤包括：将脉冲信号的数目n与时钟信号的数目N进行比较，若脉冲信号的数目n小于时钟信号的数目N，则第n+1条扫描线所对应的扫描驱动电路存在异常。
其中，检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：通过与扫描线相交的一条数据线电连接的检测端子来获取脉冲信号序列。
其中，检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：通过与扫描线相交的多条数据线电连接的多个检测端子来获取多个脉冲信号序列；根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：综合多个脉冲信号序列判断存在异常的扫 描驱动单元在扫描驱动电路的位置。
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种液晶面板，该液晶面板包括扫描驱动电路、多条数据线和多条扫描线，其中扫描驱动电路包括级联的多个扫描驱动单元，多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号；多条数据线与多条扫描线相交并电容耦合，液晶面板进一步设置有与至少一条数据线电连接的检测端子，检测端子用于输出扫描信号在数据线上所感生的脉冲信号序列。
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种扫描驱动电路的检测装置，该扫描驱动电路包括级联的多个扫描驱动单元，该检测装置包括中央处理模块和波形探测模块，中央处理模块用于控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号，波形探测模块用于检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列，中央处理模块还用于根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。
其中，中央处理模块用于判断脉冲信号序列中的脉冲信号的数目并根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置。
其中，波形探测模块用于获取与扫描线相交的一条数据线电连接的检测端子输出的脉冲信号序列；或者，波形探测模块用于获取与扫描线相交的多条数据线电连接的多个检测端子输出的多个脉冲信号序列，中央处理模块还用于综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。
其中，中央处理模块用于控制N个扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；中央处理模块用于将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则第n+1条扫描线所对应的扫描驱动单元存在异常。
其中，中央处理模块用于利用N个时钟信号依次控制N个扫描驱动单元按照从第1条到第N条的顺序提供扫描信号给N条扫描线，其中N≥3；中央处理 模块用于将脉冲信号的数目n与时钟信号的数目N进行比较，若脉冲信号的数目n小于时钟信号的数目N，则第n+1条扫描线所对应的扫描驱动电路存在异常。
本发明的有益效果是：区别于现有技术的情况，本发明通过检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列，再根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置，从而能够有效的检测扫描驱动电路中发生异常的扫描驱动单元的位置。
【附图说明】
图1是本发明液晶面板实施例的结构示意图；
图2是本发明扫描驱动电路的检测方法实施例的流程图；
图2a是本发明另一实施例中仅设置一个检测端子的液晶面板的结构示意图；
图3是本发明实施例中脉冲信号序列、时钟信号序列以及各扫描线上扫描信号的时序图；
图4是本发明实施例中脉冲信号序列的另一种波形的示意图；
图5是液晶面板的另一种结构示意图；
图6是本发明的扫描驱动电路的检测装置的模块示意图。
【具体实施方式】
请参阅图1，图1是本发明液晶面板实施例的结构示意图。在本实施例中，液晶面板包括扫描驱动电路11、多条数据线12和多条扫描线G1～GN。
扫描驱动电路包括级联的多个扫描驱动单元B1～BN，多个扫描驱动单元B1～BN依次给多条扫描线G1～GN中的对应一条提供扫描信号。
例如，多个扫描驱动单元B1～BN按照从第1条扫描线G1到第N条扫描线GN的顺序依次给多条扫描线G1～GN中的对应一条提供扫描信号，扫描驱动单元 B1给扫描线G1提供扫描信号，然后下一级的扫描驱动单元B2给扫描线G2提供扫描信号，接着下一级的扫描驱动单元B3给扫描线G3提供扫描信号，依此类推，直到扫描驱动单元BN给扫描线GN提供扫描信号。而当某一级的扫描驱动单元Bk(k大于等于1且小于等于N)异常时，该级以及该级之后的所有级的扫描驱动单元Bk～BN将不会给对应的扫描线Gk～GN提供相应的扫描信号。
多条数据线12与多条扫描线G1～GN相交并电容耦合。如图1所示，每一条数据线12均与所有的扫描线垂直相交，且数据线12与扫描线之间存在耦合电容Cgd，因而多条扫描线G1～GN上的扫描信号通过耦合电容Cgd在每一条数据线12上均感生出脉冲信号序列。
液晶面板进一步设置有与至少一条数据线12电连接的检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。
例如，液晶面板可以包括对应与多条数据线12的末端电连接的多个检测端子13，每一个检测端子13均用于输出扫描信号在对应的数据线12上感生的脉冲序列信号。
例如，液晶面板还可以仅包括与一条数据线12的末端电连接的一个检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。
请结合图1进一步参阅图2，图2是本发明扫描驱动电路的检测方法实施例的流程图。在本实施例中，扫描驱动电路11包括级联的多个扫描驱动单元B1～BN，扫描驱动电路的检测方法包括以下步骤：
步骤S11：控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号。
在步骤S11中，多个扫描驱动单元B1～BN按照从第1条扫描线G1到第N条扫描线GN的顺序依次给多条扫描线G1～GN中的对应一条提供扫描信号，扫描驱动单元B1给扫描线G1提供扫描信号，然后下一级的扫描驱动单元B2给扫描线G2提供扫描信号，接着下一级的扫描驱动单元B3给扫描线G3提供扫描信号，依此类推，直到扫描驱动单元BN给扫描线GN提供扫描信号，当某一级的扫描 驱动单元Bk(k大于等于1且小于等于N)异常时，该级以及该级之后的所有级的扫描驱动单元Bk～BN将不会给对应的扫描线Gk～GN提供相应的扫描信号。
步骤S12：检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列。
在步骤S12中，多条数据线12与多条扫描线G1～GN相交并电容耦合。如图1所示，每一条数据线12均与所有的扫描线垂直相交，且数据线12与扫描线之间存在耦合电容Cgd，因而多条扫描线G1～GN上的扫描信号通过耦合电容Cgd在每一条数据线12上均感生出脉冲信号序列。液晶面板进一步设置有与至少一条数据线12电连接的检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。
步骤S13：根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。
在步骤S11～步骤S13中，例如，液晶面板可以包括对应于多条数据线12的末端电连接的多个检测端子13，每一个检测端子13均用于输出扫描信号在对应的数据线12上感生的脉冲序列信号，在这种情形下，检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：通过与扫描线相交的多条数据线电连接的多个检测端子来获取多个脉冲信号序列。根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。例如，综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤可以为：比对多个脉冲信号序列，剔除与其佘的大部分脉冲信号序列不相同的脉冲信号序列，从而筛选出正确的脉冲信号序列，再根据正确的脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置，再例如，综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤还可以为：分别判断多个脉冲信号序列中的脉冲信号的数目；根据最大的脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置。请参阅 图2a，图2a是本发明另一实施例中仅设置一个检测端子的液晶面板的结构示意图。例如，液晶面板还可以仅设置与一条数据线12的末端电连接的一个检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。在这种情形下，检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：通过与扫描线相交的一条数据线电连接的检测端子来获取脉冲信号序列。
在步骤S11～步骤S13中，控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：控制N个扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则第n+1条扫描线所对应的扫描驱动单元存在异常。请进一步结合参阅图3，图3是本发明实施例中脉冲信号序列、时钟信号序列以及各扫描线上扫描信号的时序图。第1条扫描线G1上的扫描信号A1在数据线12上感生的脉冲信号为P1，第2条扫描线G2上的扫描信号A2在数据线12上感生的脉冲信号为P2，第n条扫描线Gn上的扫描信号An在数据线12上感生的脉冲信号为Pn，从而形成脉冲序列信号P，脉冲信号序列P中脉冲信号P1～Pn的数目为n，将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则判断为存在扫描驱动单元异常，且判断为第n+1条扫描线所对应的扫描驱动单元Bn+1存在异常。
另一种情况是，如图3所示，还可以根据脉冲信号序列P和时钟信号序列C的比较，来确定判断存在异常的扫描驱动单元在扫描驱动电路的位置，具体如下，控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：利用N个时钟信号依次控制N个扫描驱动单元按照从第1条到第N条的顺序提供扫描信号给N条扫描线，其中N≥3；根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置的步骤包括：将脉冲信号的数目n 与时钟信号序列C中时钟信号的数目N进行比较，若脉冲信号的数目n小于时钟信号的数目N，则第n+1条扫描线所对应的扫描驱动电路存在异常。
另一种情况是，在实际的检测过程中，由于显示面板本身漏电，脉冲信号序列P不是理想的方波波形，而是为衰减波形，具体如图4所示，图4是本发明实施例中脉冲信号序列的另一种波形的示意图。
请进一步参阅图5，图5是液晶面板的另一种结构示意图，在其他实施例中，液晶面板可以包括对应于多条数据线12的末端电连接的多个检测端子13，每一个检测端子13均用于输出扫描信号在对应的数据线12上感生的脉冲序列信号，且数据线12和检测端子13之间连接有可控开关14，且可控开关14在其使能端EN高电平时导通，低电平时关闭，因此可是控制多条数据线12的检测端子13中哪几个使用，从而选择获取多条数据线12中的哪几个上面的脉冲信号序列。
请进一步参阅图6，图6是本发明的扫描驱动电路的检测装置的模块示意图。在本实施例中，该扫描驱动电路11包括级联的多个扫描驱动单元B1～BN，具体请参阅上文的描述，多个扫描驱动单元B1～BN按照从第1条扫描线G1到第N条扫描线GN的顺序依次给多条扫描线G1～GN中的对应一条提供扫描信号，扫描驱动单元B1给扫描线G1提供扫描信号，然后下一级的扫描驱动单元B2给扫描线G2提供扫描信号，接着下一级的扫描驱动单元B3给扫描线G3提供扫描信号，依此类推，直到扫描驱动单元BN给扫描线GN提供扫描信号；当某一级的扫描驱动单元Bk(k大于等于1且小于等于N)异常时，该级以及该级之后的所有级的扫描驱动单元Bk～BN将不会给对应的扫描线Gk～GN提供相应的扫描信号。该检测装置包括中央处理模块21和波形探测模块22，中央处理模块21用于控制多个扫描驱动单元B1～BN依次给多条扫描线G1～GN中的对应一条提供扫描信号，波形探测模块22用于检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列，中央处理模块21还用于根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。多条数据线12与多条扫描线G1～GN相交并电容耦合。如图1所示，每一条数据线12均与所有的扫描线垂直 相交，且数据线12与扫描线之间存在耦合电容Cgd，因而多条扫描线G1～GN上的扫描信号通过耦合电容Cgd在每一条数据线12上均感生出脉冲信号序列。液晶面板进一步设置有与至少一条数据线12电连接的检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。
液晶面板可以包括对应于多条数据线12的末端电连接的多个检测端子13，每一个检测端子13均用于输出扫描信号在对应的数据线12上感生的脉冲序列信号，在这种情形下，波形探测模块22检测与多条扫描线相交并电容耦合的至少一条数据线12上所感生的脉冲信号序列为：波形探测模块22通过与扫描线相交的多条数据线12电连接的多个检测端子13来获取多个脉冲信号序列，其中，波形探测模块22与检测端子13均电连接。中央处理模块21根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置为：中央处理模块21综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置。例如，中央处理模块21综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置可以为：中央处理模块21比对多个脉冲信号序列，剔除与其佘的大部分脉冲信号序列不相同的脉冲信号序列，从而筛选出正确的脉冲信号序列，在根据正确的脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置，再例如，中央处理模块21综合多个脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置还可以为：中央处理模块21分别判断多个脉冲信号序列中的脉冲信号的数目；中央处理模块21根据最大的脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置。
例如，液晶面板还可以仅设置与一条数据线12的末端电连接的一个检测端子13，检测端子13用于输出扫描信号在数据线12上所感生的脉冲信号序列。在这种情形下，波形探测模块22检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列可以为：波形探测模块22通过与扫描线相交的一条数据线电连接的检测端子来获取脉冲信号序列。
优选地，中央处理模块21用于判断脉冲信号序列中的脉冲信号的数目并根 据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置。
优选地，中央处理模块21用于控制N个扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3，中央处理模块用于将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则第n+1条扫描线所对应的扫描驱动单元存在异常。中央处理模块21控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号可以为：中央处理模块21控制N个扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；中央处理模块21根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置可以为：中央处理模块21将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则第n+1条扫描线所对应的扫描驱动单元存在异常。参阅图3，第1条扫描线G1上的扫描信号A1在数据线12上感生的脉冲信号为P1，第2条扫描线G2上的扫描信号A2在数据线12上感生的脉冲信号为P2，第n条扫描线Gn上的扫描信号An在数据线12上感生的脉冲信号为Pn，从而形成脉冲序列信号P，脉冲信号序列P中脉冲信号P1～Pn的数目为n，将脉冲信号的数目n与扫描线的数目N进行比较，若脉冲信号的数目n小于扫描线的数目N，则判断为存在扫描驱动单元异常，且判断为第n+1条扫描线所对应的扫描驱动单元Bn+1存在异常。
另一种情况是，如图3所示，中央处理模块21还可以根据脉冲信号序列P和时钟信号序列C的比较，来确定判断存在异常的扫描驱动单元在扫描驱动电路的位置，具体如下，中央处理模块21控制多个扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号可以为：中央处理模块21利用N个时钟信号依次控制N个扫描驱动单元按照从第1条到第N条的顺序提供扫描信号给N条扫描线，其中N≥3；中央处理模块21根据脉冲信号的数目判断存在异常的扫描驱动单元在扫描驱动电路的位置可以为：中央处理模块21将脉冲信号的数目n与时钟信号序列C中时钟信号的数目N进行比较，若脉冲信号的数目n小于时钟 信号的数目N，则第n+1条扫描线所对应的扫描驱动电路存在异常。
另一种情况是，在实际的检测过程中，由于显示面板本身漏电，脉冲信号序列P不是理想的方波波形，而是为衰减波形，具体如图4所示。
请进一步参阅图5，在其他实施例中，液晶面板可以包括对应于多条数据线12的末端电连接的多个检测端子13，每一个检测端子13均用于输出扫描信号在对应的数据线12上感生的脉冲序列信号，且数据线12和检测端子13之间连接有可控开关14，且可控开关14在其使能端EN高电平时导通，低电平时关闭，因此可是控制多条数据线12的检测端子13中哪几个使用，从而选择获取多条数据线12中的哪几个上面的脉冲信号序列。
本发明通过检测与多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列，再根据脉冲信号序列判断存在异常的扫描驱动单元在扫描驱动电路的位置，从而能够有效的检测扫描驱动电路中发生异常的扫描驱动单元的位置。
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (12)

  1. 一种扫描驱动电路的检测方法，其中，所述扫描驱动电路包括级联的多个扫描驱动单元，所述检测方法包括：
    控制多个所述扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号；
    检测与所述多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列；
    根据所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  2. 根据权利要求1所述的检测方法，其中，所述根据所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置的步骤包括：
    判断所述脉冲信号序列中的脉冲信号的数目；
    根据所述脉冲信号的数目判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  3. 根据权利要求2所述的检测方法，其中，所述控制多个所述扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：
    控制N个所述扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；
    所述根据所述脉冲信号的数目判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置的步骤包括：
    将所述脉冲信号的数目n与所述扫描线的数目N进行比较，若所述脉冲信号的数目n小于所述扫描线的数目N，则第n+1条所述扫描线所对应的扫描驱动单元存在异常。
  4. 根据权利要求2所述的检测方法，其中，所述控制多个所述扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号的步骤包括：
    利用N个时钟信号依次控制N个所述扫描驱动单元按照从第1条到第N条 的顺序提供扫描信号给N条扫描线，其中N≥3；
    所述根据所述脉冲信号的数目判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置的的步骤包括：
    将所述脉冲信号的数目n与时钟信号的数目N进行比较，若所述脉冲信号的数目n小于所述时钟信号的数目N，则第n+1条所述扫描线所对应的扫描驱动电路存在异常。
  5. 根据权利要求1所述的检测方法，其中，所述检测与所述多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：
    获取与所述扫描线相交的一条数据线电连接的检测端子输出的所述脉冲信号序列。
  6. 根据权利要求1所述的检测方法，其中，所述检测与所述多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列的步骤包括：
    获取与所述扫描线相交的多条数据线电连接的多个检测端子输出的多个所述脉冲信号序列；
    所述根据所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置的步骤包括：
    综合多个所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  7. 一种液晶面板，其中，所述液晶面板包括扫描驱动电路、多条数据线和多条扫描线，其中所述扫描驱动电路包括级联的多个扫描驱动单元，多个所述扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号；所述多条数据线与所述多条扫描线相交并电容耦合，所述液晶面板进一步设置有与至少一条数据线电连接的检测端子，所述检测端子用于输出所述扫描信号在所述数据线上所感生的脉冲信号序列。
  8. 一种扫描驱动电路的检测装置，其中，所述扫描驱动电路包括级联的多个扫描驱动单元，所述检测装置包括中央处理模块和波形探测模块，所述中央 处理模块用于控制多个所述扫描驱动单元依次给多条扫描线中的对应一条提供扫描信号，所述波形探测模块用于检测与所述多条扫描线相交并电容耦合的至少一条数据线上所感生的脉冲信号序列，所述中央处理模块还用于根据所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  9. 根据权利要求8所述的检测装置，其中，所述中央处理模块用于判断所述脉冲信号序列中的脉冲信号的数目并根据所述脉冲信号的数目判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  10. 根据权利要求9所述的检测装置，其中，所述波形探测模块用于获取与所述扫描线相交的一条数据线电连接的检测端子输出的所述脉冲信号序列；或者，所述波形探测模块用于获取与所述扫描线相交的多条数据线电连接的多个检测端子输出的多个所述脉冲信号序列，所述中央处理模块还用于综合多个所述脉冲信号序列判断存在异常的所述扫描驱动单元在所述扫描驱动电路的位置。
  11. 根据权利要求9所述的检测装置，其中，所述中央处理模块用于控制N个所述扫描驱动单元按照从第1条到第N条的顺序依次提供扫描信号给N条扫描线，其中N≥3；所述中央处理模块用于将所述脉冲信号的数目n与所述扫描线的数目N进行比较，若所述脉冲信号的数目n小于所述扫描线的数目N，则第n+1条所述扫描线所对应的扫描驱动单元存在异常。
  12. 根据权利要求9所述的检测装置，其中，所述中央处理模块用于利用N个时钟信号依次控制N个所述扫描驱动单元按照从第1条到第N条的顺序提供扫描信号给N条扫描线，其中N≥3；所述中央处理模块用于将所述脉冲信号的数目n与时钟信号的数目N进行比较，若所述脉冲信号的数目n小于所述时钟信号的数目N，则第n+1条所述扫描线所对应的扫描驱动电路存在异常。
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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104916243B (zh) * 2015-06-29 2017-10-17 深圳市华星光电技术有限公司 扫描驱动电路的检测方法和检测装置、液晶面板
CN107025870B (zh) * 2017-05-17 2021-02-19 昆山龙腾光电股份有限公司 检测电路、显示装置和检测方法
CN109036236B (zh) * 2018-09-14 2021-10-26 京东方科技集团股份有限公司 阵列基板检测方法及检测装置
CN110428760A (zh) * 2019-06-27 2019-11-08 重庆惠科金渝光电科技有限公司 一种显示面板测试方法、显示面板以及显示装置
CN112331115A (zh) * 2020-11-05 2021-02-05 北海惠科光电技术有限公司 液晶面板和液晶面板goa电路检测方法
CN112331117B (zh) * 2020-11-05 2022-06-03 北海惠科光电技术有限公司 液晶面板和液晶面板数据线电压检测方法
CN113364253B (zh) * 2021-07-05 2025-07-18 珠海格力电器股份有限公司 一种变频器的主控板的控制装置、方法和变频器

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622754B1 (en) * 1993-04-30 1999-11-24 Sharp Kabushiki Kaisha Display-integrated type tablet device with high co-ordinate detection accuracy and method for driving the same
DE19542972C2 (de) * 1994-11-17 2001-11-29 Nec Corp Integrierte Tafelvorrichtung mit Positionserfassungsfunktion und Bildanzeigefunktion sowie Betriebsverfahren dafür
CN103279214A (zh) * 2012-06-28 2013-09-04 上海天马微电子有限公司 触摸显示屏的驱动方法
CN104240631A (zh) * 2014-08-18 2014-12-24 京东方科技集团股份有限公司 Goa电路及其驱动方法、显示装置
CN104916243A (zh) * 2015-06-29 2015-09-16 深圳市华星光电技术有限公司 扫描驱动电路的检测方法和检测装置、液晶面板

Family Cites Families (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3918536B2 (ja) * 2000-11-30 2007-05-23 セイコーエプソン株式会社 電気光学装置の駆動方法、駆動回路及び電気光学装置並びに電子機器
JP5063841B2 (ja) * 2001-06-27 2012-10-31 パナソニック株式会社 プラズマディスプレイパネルの駆動方法
US7098876B2 (en) * 2001-09-06 2006-08-29 Samsung Sdi Co., Ltd. Image display method and system for plasma display panel
KR100467447B1 (ko) * 2001-11-12 2005-01-24 삼성에스디아이 주식회사 플라즈마 디스플레이 패널의 화상 표시 방법 및 그 장치
KR100480172B1 (ko) * 2002-07-16 2005-04-06 엘지전자 주식회사 플라즈마 디스플레이 패널의 구동방법 및 장치
KR100927013B1 (ko) * 2002-11-22 2009-11-16 엘지디스플레이 주식회사 액정표시장치 및 그 구동방법
KR100614639B1 (ko) * 2003-07-24 2006-08-22 삼성전자주식회사 쓰기 방지 가능한 버퍼 메모리를 갖는 메모리 장치 및그것을 포함하는 정보 처리 시스템
JP4395714B2 (ja) * 2003-09-02 2010-01-13 セイコーエプソン株式会社 電気光学装置のクロストーク補正方法、その補正回路、電気光学装置および電子機器
TWI239424B (en) * 2003-10-15 2005-09-11 Hannstar Display Corp Liquid crystal display panel and driving method therefor
KR20060104223A (ko) * 2005-03-29 2006-10-09 삼성에스디아이 주식회사 전자방출소자의 구동장치 및 그 구동 방법
KR100727300B1 (ko) * 2005-09-09 2007-06-12 엘지전자 주식회사 플라즈마 디스플레이 장치 및 그의 구동 방법
WO2007037043A1 (ja) * 2005-09-28 2007-04-05 Sharp Kabushiki Kaisha 表示パネル及び表示装置
KR101281667B1 (ko) * 2006-05-11 2013-07-03 엘지디스플레이 주식회사 액정표시장치의 소프트 페일 처리 회로 및 방법
JP5115058B2 (ja) * 2006-08-28 2013-01-09 株式会社Ｊｖｃケンウッド 電子機器の制御装置及び電子機器の制御方法
KR101254227B1 (ko) * 2006-08-29 2013-04-19 삼성디스플레이 주식회사 표시패널
JP4291843B2 (ja) * 2006-10-19 2009-07-08 株式会社東京カソード研究所 パターン検査装置
KR20080049216A (ko) * 2006-11-30 2008-06-04 엘지디스플레이 주식회사 액정 표시 장치 및 그 검사 방법
KR101502366B1 (ko) * 2007-06-12 2015-03-16 엘지디스플레이 주식회사 액정 표시 장치 및 그 검사 방법
US7929870B2 (en) * 2007-07-19 2011-04-19 Fuji Xerox Co., Ltd. Image forming apparatus with a toner dispensing control unit
TWI383352B (zh) * 2007-10-18 2013-01-21 Chunghwa Picture Tubes Ltd 影像顯示裝置的低功率驅動方法與驅動信號產生方法
WO2009120028A2 (en) * 2008-03-27 2009-10-01 Electronics And Telecommunications Research Institute Wireless multi-carrier code division multiplexing communication apparatus using transmit diversity scheme
KR101139208B1 (ko) * 2008-12-11 2012-04-26 파나소닉 주식회사 플라즈마 디스플레이 장치의 구동 방법
KR101108172B1 (ko) * 2010-03-16 2012-01-31 삼성모바일디스플레이주식회사 스캔 드라이버 및 이를 이용한 유기 발광 표시 장치
DE102012107954B4 (de) * 2011-09-02 2025-12-18 Samsung Electronics Co. Ltd. Anzeigetreiber, Betriebsverfahren davon, Host zur Steuerung des Anzeigetreibers und System mit dem Anzeigetreiber und dem Host
KR20130090616A (ko) * 2012-02-06 2013-08-14 삼성디스플레이 주식회사 표시 장치 및 그 구동 방법
CN103698927B (zh) * 2013-12-31 2017-05-10 敦泰电子有限公司 触摸显示装置、驱动电路及驱动方法
KR102271488B1 (ko) * 2014-12-02 2021-07-01 엘지디스플레이 주식회사 전압 공급부와 이를 포함한 표시장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0622754B1 (en) * 1993-04-30 1999-11-24 Sharp Kabushiki Kaisha Display-integrated type tablet device with high co-ordinate detection accuracy and method for driving the same
DE19542972C2 (de) * 1994-11-17 2001-11-29 Nec Corp Integrierte Tafelvorrichtung mit Positionserfassungsfunktion und Bildanzeigefunktion sowie Betriebsverfahren dafür
CN103279214A (zh) * 2012-06-28 2013-09-04 上海天马微电子有限公司 触摸显示屏的驱动方法
CN104240631A (zh) * 2014-08-18 2014-12-24 京东方科技集团股份有限公司 Goa电路及其驱动方法、显示装置
CN104916243A (zh) * 2015-06-29 2015-09-16 深圳市华星光电技术有限公司 扫描驱动电路的检测方法和检测装置、液晶面板

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