WO2019205304A1 - 检测信号选择电路、阵列基板、显示面板 - Google Patents

检测信号选择电路、阵列基板、显示面板 Download PDF

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Publication number
WO2019205304A1
WO2019205304A1 PCT/CN2018/096198 CN2018096198W WO2019205304A1 WO 2019205304 A1 WO2019205304 A1 WO 2019205304A1 CN 2018096198 W CN2018096198 W CN 2018096198W WO 2019205304 A1 WO2019205304 A1 WO 2019205304A1
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Prior art keywords
signal
input end
output
level
source
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PCT/CN2018/096198
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English (en)
French (fr)
Inventor
陈彩琴
王一伊
王少波
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武汉华星光电半导体显示技术有限公司
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Application filed by 武汉华星光电半导体显示技术有限公司 filed Critical 武汉华星光电半导体显示技术有限公司
Priority to US16/115,533 priority Critical patent/US10769978B2/en
Publication of WO2019205304A1 publication Critical patent/WO2019205304A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/006Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a detection signal selection circuit, an array substrate, and a display panel.
  • Existing display devices are usually provided with a scan driving circuit for outputting a scan driving signal to drive the pixel circuit to operate.
  • the scan driving circuit usually has a multi-stage driving unit, and each stage driving unit outputs a scan driving signal, and the scanning driving circuit can be judged by detecting a difference between the first and last scanning driving signals outputted by the scanning driving circuit.
  • the existing detection method is to connect the output end of the last-stage scan driving circuit to an output end, and the output signal is abnormally detected by the oscilloscope, but the method is only applicable to the display device of one-way scanning, when the display device is bidirectional scanning At present, the existing method can only satisfy the detection of one scanning direction.
  • the technical problem to be solved by the present application is to provide a detection signal selection circuit and selection method, an array substrate, and a display panel, which can solve the problem that the existing detection method is only suitable for a one-way scanning display device.
  • a technical solution adopted by the present application is to provide a detection signal selection circuit applied to a scan driving circuit of a display panel, the scan driving circuit including a multi-level driving unit, each stage The driving unit outputs a scan driving signal
  • the detection signal selecting circuit includes: a first switching unit and a second switching unit, the first switching unit includes a first control end, a first input end and a first output end, and the second switch unit comprises a second control end, a second input end and a second output end, wherein the first output end is connected to the second output end, the first input end is connected to the output end of the first stage drive unit, and the second input end is connected to the last stage drive unit
  • the first control signal input by the first control terminal controls the switch of the first switch unit
  • the second control signal input by the second control terminal controls the switch of the second switch unit to output according to the output sequence of the scan drive signal Selectively outputting an output signal of the first output terminal or the second output terminal
  • the first switching unit includes a first thin film transistor
  • an array substrate comprising: a scan drive circuit and a detection signal selection circuit connected to each other; wherein the scan drive circuit comprises a multi-level drive unit, each stage The driving unit outputs a scan driving signal, and the detecting signal selecting circuit comprises: a first switching unit and a second switching unit, wherein the first switching unit comprises a first control end, a first input end and a first output end, and the second switching unit comprises a first a second control end, a second input end and a second output end, wherein the first output end is connected to the second output end, the first input end is connected to the output end of the first stage drive unit, and the second input end is connected to the last stage drive unit
  • the output terminal wherein the first control signal input by the first control terminal controls the switch of the first switch unit, and the second control signal input by the second control terminal controls the switch of the second switch unit to select according to the output order of the scan drive signal
  • another technical solution adopted by the present application is to provide a display panel including at least the array substrate as described above.
  • the detection signal selection circuit in some embodiments of the present application can be based on the output order of the scan driving signals through the selective switches of the first switching unit and the second switching unit. Selectively outputting an output signal of the first output end or the second output end, wherein the output signal of the first output end is a scan drive signal output by the first stage drive unit, and the output signal of the second output end is a final stage drive unit output
  • the scan signal selection circuit can select the second switch unit to be turned on when the forward scan, that is, the output order of the scan drive signal is output from the first stage to the last stage, and output the last stage.
  • the scan driving signal output by the driving unit, and in the reverse scanning, the first switching unit can be selected to be turned on, and the scanning driving signal outputted by the first-stage driving unit is output, thereby realizing the scanning drive capable of outputting the last output when performing bidirectional scanning.
  • the signal in turn, enables detection of the scan drive circuit for bidirectional scanning.
  • FIG. 1 is a schematic diagram showing the circuit structure of a first embodiment of a detection signal selection circuit of the present application
  • FIG. 2 is a schematic structural diagram of a circuit of a second embodiment of the detection signal selection circuit of the present application.
  • FIG. 3 is a schematic structural view of an embodiment of an array substrate of the present application.
  • FIG. 4 is a schematic diagram showing a specific circuit structure of the level signal output circuit of FIG. 3;
  • FIG. 5 is a schematic structural view of an embodiment of a display panel of the present application.
  • FIG. 6 is a schematic flow chart of an embodiment of a method for selecting a detection signal according to the present application.
  • the first embodiment of the detection signal selection circuit 10 of the present application includes a first switching unit 101 and a second switching unit 102.
  • the detection signal selection circuit 10 is applied to a scan driving circuit of the display panel, and the output of the last scan driving signal outputted at each scan can be detected, so that the difference between the scan drive electric signal and the last scan drive signal at the initial output is excessively large.
  • the scan drive circuit can be overhauled.
  • the scan driving circuit 30 includes a multi-stage (n-level) driving unit 301, and each stage driving unit 301 outputs a scan driving signal.
  • the first switching unit 101 includes a first control terminal D2U, a first input terminal G1 and a first output terminal Out1
  • the second switching unit 102 includes a second control terminal U2D, a second input terminal Gn and a second output terminal Out2, wherein An output terminal Out1 and a second output terminal Out2 are connected to form a final output terminal.
  • the first input terminal G1 is connected to the output end of the first-stage driving unit 301
  • the second input terminal Gn is connected to the output terminal of the last-stage driving unit 301.
  • the first control signal input by the first control terminal D2U controls the switch of the first switching unit 101
  • the second control signal input by the second control terminal U2D controls the switch of the second switching unit 102 to output according to the output sequence of the scan driving signal.
  • the output signal of the first output terminal Out1 or the second output terminal Out2 is selectively output.
  • the first switching unit 101 may include a controlled switching element such as a thin film transistor or the like.
  • the second control signal input by the second control terminal U2D is used to control The second switching unit 102 is turned on, and the first control signal input by the first control terminal D2U controls the first switching unit 101 to be turned off.
  • the first output terminal Out1 does not output the scan driving signal G1 output by the first-stage driving unit.
  • the second output terminal Out2 can output the scan driving signal Gn output by the last stage driving unit.
  • the first control signal input by the first control terminal D2U controls the first
  • the switch unit 101 is turned on
  • the second control signal input by the second control terminal U2D controls the second switch unit 102 to be turned off.
  • the first output terminal Out1 can output the scan drive signal G1 output by the first stage drive unit.
  • the two output terminals Out2 do not output the scan driving signal Gn output by the last stage driving unit. Therefore, the detection signal selection circuit 10 can realize the selection of the last output scan driving signal for output during bidirectional scanning, so as to facilitate subsequent detection of the scan driving signal, thereby facilitating detection of an abnormality of the scan driving circuit, thereby Achieve timely maintenance.
  • the detection signal selection circuit can be applied to a gate scan driving circuit (Scan) GOA) can also be applied to an illuminating pixel driving circuit (EM GOA), which is not specifically limited herein.
  • Scan gate scan driving circuit
  • EM GOA illuminating pixel driving circuit
  • the first switching unit and the second switching unit may each adopt a thin film transistor.
  • the second embodiment of the detection signal selection circuit of the present application is similar to the structure of the first embodiment of the detection signal selection circuit of the present application, except that the detection signal selection circuit 20 of the present embodiment is first.
  • the switching unit 101 includes a first thin film transistor T1.
  • the first thin film transistor T1 includes a first gate B1, a first source S1 and a first drain D1.
  • the first gate B1 is connected to the first control terminal D2U, the first source. S1 is connected to the first input terminal G1, and the first drain D1 is connected to the first output terminal Out1.
  • the second switching unit 102 includes a second thin film transistor T2.
  • the second thin film transistor T2 includes a second gate B2, a second source S2, and a second drain D2.
  • the second gate B2 is connected to the second control terminal U2D.
  • the source S2 is connected to the second input terminal Gn, and the second drain D2 is connected to the second output terminal Out2.
  • the first source S1 and the first drain D1 are also interchangeable, and the second source S2 and the second drain D2 are also interchangeable.
  • the first thin film transistor T1 and the second thin film transistor T2 may each adopt a PMOS transistor or an NMOS transistor, or one of the PMOS transistors and one of the NMOS transistors, which is not specifically limited herein.
  • the first thin film transistor T1 and the second thin film transistor T2 each adopt a PMOS transistor, and when the scan driving circuit 30 is forward scanning, that is, the output order of the scan driving signal
  • the second control signal input by the second control terminal U2D is a low level signal
  • the second thin film transistor T2 is controlled to be turned on
  • the first control terminal D2U inputs the first A control signal is a high level signal
  • the first thin film transistor T1 is controlled to be turned off.
  • the first output terminal Out1 does not output the scan driving signal G1 outputted by the first stage driving unit, and the second output terminal Out2 can output the last stage.
  • the scan driving signal Gn output by the driving unit.
  • the first control signal input by the first control terminal D2U is a low level.
  • the signal is controlled to open the first thin film transistor T1, and the second control signal input by the second control terminal U2D is a high level signal, and the second thin film transistor T2 is controlled to be turned off.
  • the first output terminal Out1 can output the first stage.
  • the scan driving signal G1 outputted by the driving unit does not output the scan driving signal Gn outputted by the last stage driving unit. Therefore, the detection signal selection circuit 10 can realize the selection of the last output scan driving signal for output during bidirectional scanning, so as to facilitate subsequent detection of the scan driving signal, thereby facilitating detection of an abnormality of the scan driving circuit, thereby Achieve timely maintenance.
  • the first switching unit and the second switching unit may also adopt other switching elements, which are not specifically limited herein.
  • an embodiment of the array substrate of the present application includes: a scan drive circuit 401 and a detection signal selection circuit 402 connected to each other;
  • the scan driving circuit 401 includes a multi-stage driving unit 4011. Each stage driving unit 4011 outputs a scan driving signal.
  • the detecting signal selecting circuit 402 can refer to the circuit of the first or second embodiment of the detecting signal selecting circuit of the present application. It will not be repeated.
  • the array substrate further includes: a first power signal input terminal VGH, a second power signal input terminal VGL, a first clock signal input terminal CK, a second clock signal input terminal XCK, and a level transmission signal.
  • Each stage of the driving unit 4011 includes a level signal input terminal ST, a first driving input terminal V1, a second driving input terminal V2, a first clock input terminal CK1, a second clock input terminal CK2, and at least one driving signal output terminal G1 or G2 or ... Gn, the level signal input terminal ST is connected to the level signal output circuit 403, the first drive input terminal V1 is connected to the first power signal input terminal VGH, and the second drive input terminal V2 is connected to the second power signal input terminal VGL.
  • the first clock input terminal CK1 is connected to the first clock signal input terminal CK, the second clock input terminal CK2 is connected to the second clock signal input terminal XCK, and the driving signal output terminal G1 or G2 or ...
  • the driving signal output terminal G1 of the stage driving unit 4011 is connected to the input end of the first switching unit of the detection signal selection circuit 402, and the driving signal output terminal Gn of the last stage driving unit 4011 is connected to the second switching unit of the detection signal selecting circuit 402. Input.
  • the first power signal input by the first power signal input terminal VGH is a high level signal
  • the second power signal input by the second power input terminal VGL is a low level signal
  • the second clock signal input terminal XCK is input.
  • the second clock signal is an inverted signal of the first clock signal input by the first clock signal input terminal CK.
  • the driving unit can adopt an existing bidirectional scanning driving circuit, which is not specifically limited herein.
  • the array substrate of this embodiment further includes: an initial stage signal input terminal STV, the stage signal output circuit 403 includes a multi-stage level signal output unit 4031, and each stage level signal output unit 4031 includes a level transmission.
  • the output terminal Gn-1 of the previous stage driving unit 4011 is connected, the second input terminal STV2 of the level transmission signal is connected to the first control signal input terminal D2U, and the third input terminal STV3 of the level transmission signal is connected to the second control signal input terminal U2D.
  • the signal fourth input terminal STV4 is connected to the output terminal Gn+1 of the next stage driving unit 4011, and the level signal output terminal STVO is connected to the level signal input terminal ST of the corresponding stage driving unit 4011.
  • the first stage level signal output unit 4031 Since the first stage level signal output unit does not have a corresponding previous stage driving unit, and the last stage level signal output unit does not have a corresponding next stage driving unit, the first stage level signal output unit 4031
  • the first input terminal STV1 of the level transmission signal and the fourth input terminal STV4 of the level transmission signal of the last stage level signal output unit 4031 are both connected to the initial stage signal input terminal STV.
  • the level signal output circuit 403 is configured to output a level transmission signal to the corresponding each stage driving unit 4011.
  • the level transmission signal output by the first stage level signal output unit is the level transmission signal STV input by the initial stage signal input terminal, and when the driving circuit 401 is reversed During scanning, the level-transmitted signal output by the last stage-level signal output unit is the level-transmitted signal STV input to the input signal input end of the initial stage.
  • the level signal output unit 4011 may adopt a circuit as shown in FIG. 4(a), the level signal output unit 4011 includes a third thin film transistor T3 and a fourth thin film transistor T4, and the third thin film transistor T3 includes The third gate B3, the third source S3 and the third drain D3, the third gate B3 is connected to the third input terminal STV3 of the level transmission signal, that is, the second control signal U2D is input, and the third source S3 is connected to the level transmission signal.
  • An input terminal STV1 that is, a scan driving signal Gn-1 outputted by the corresponding previous stage driving unit
  • the fourth thin film transistor T4 includes a fourth gate B4, a fourth source S4 and a fourth drain D4, and a fourth gate
  • the pole B4 is connected to the second input terminal STV2 of the signal transmission signal, that is, the first control signal D2U is input
  • the fourth source S4 is connected to the fourth input terminal STV4 of the level transmission signal, that is, the scan driving signal Gn outputted by the corresponding lower-level driving unit is input.
  • the third drain and the fourth drain are connected to the level signal output terminal STVO for outputting the level transmission signal.
  • the third source S3 and the third drain D3 are also interchangeable, and the fourth source S4 and the fourth drain D4 are also interchangeable.
  • the third thin film transistor T3 and the fourth thin film transistor T4 may each adopt a PMOS transistor or an NMOS transistor.
  • the third thin film transistor T3 and the fourth thin film transistor T4 each adopt a PMOS transistor.
  • the scan driving circuit 401 scans in the forward direction, U2D outputs a low level signal, and the T3 tube is turned on, D2U. Output high level signal, T4 tube is cut off, only Gn-1 signal output, while in scan scan circuit 401 reverse scan, U2D outputs low level signal, T4 tube is turned on, T3 tube is turned off, only Gn+1 signal output .
  • the level signal output unit 4011 may also adopt a circuit structure as shown in FIG. 4(b).
  • the level signal output unit 4011 includes a fifth thin film transistor T5 and a sixth thin film transistor T6, and a fifth thin film transistor T5.
  • the fifth gate B5, the fifth source S5 and the fifth drain D5 are connected, and the fifth gate B5 is connected to the first input terminal STV1 of the level transmission signal, that is, the scan driving signal Gn- outputted by the corresponding previous stage driving unit is input. 1.
  • the fifth source S5 is connected to the third input terminal STV3, that is, the second control signal U2D is input, and the sixth thin film transistor T6 includes a sixth gate B6, a sixth source S6, and a sixth drain D6.
  • the sixth gate B6 is connected to the fourth input terminal STV2, that is, the scan drive signal Gn+1 outputted by the corresponding next-stage driving unit is input, and the sixth source S6 is connected to the second input end of the level-transmitting signal, that is, the input first
  • the control signal D2U, the fifth drain D5 and the sixth drain D6 are connected to the level signal output terminal STVO for outputting the level transmission signal.
  • the fifth source S5 and the fifth drain D5 are also interchangeable, and the sixth source S6 and the sixth drain D6 are also interchangeable.
  • the fifth thin film transistor T5 and the sixth thin film transistor T6 may each adopt a PMOS transistor or an NMOS transistor.
  • the working process of T5 and T6 is similar to that of T3 and T4 and will not be repeated here.
  • an embodiment of the display panel 50 of the present application includes at least an array substrate 501.
  • the array substrate 501 can refer to the structure of an embodiment of the array substrate of the present application, and details are not described herein again.
  • the display panel 50 can be an OLED (Organic) Light Emitting Display, such as AMOLED (Active Matrix Organic Light Emitting) Display, active matrix organic light emitting display), or LCD (Liquid Crystal Display).
  • OLED Organic Light Emitting Display
  • AMOLED Active Matrix Organic Light Emitting
  • LCD Liquid Crystal Display
  • the color filter substrate, the liquid crystal, or other components may be further included according to the type of the display panel, which is not specifically limited this time.
  • the detection signal selection circuit can selectively output the first output end or the first output terminal according to the output order of the scan driving signal through the selective switch of the first switching unit and the second switching unit.
  • An output signal of the second output end wherein the output signal of the first output end is a scan drive signal output by the first stage drive unit, and the output signal of the second output end is a scan drive signal output by the last stage drive unit, then the detection signal is selected
  • the circuit can select the second switch unit to be turned on when the output sequence of the scan drive signal is output from the first stage to the last stage in the forward scan, and output the scan drive signal output by the last stage drive unit.
  • the first switch unit can be selected to be turned on, and the scan drive signal outputted by the first stage drive unit can be output, so that the scan output signal of the last output can be output when the bidirectional scan is realized, thereby enabling the scan drive of the bidirectional scan. Circuit detection.
  • an embodiment of the method for selecting a detection signal of the present application is applied to an array substrate provided by an embodiment of the array substrate of the present application.
  • the selection method includes:
  • S101 Acquire an output sequence of a scan driving signal output by the scan driving circuit
  • S102 output the first control signal and the second control signal according to the output sequence, so that when the scan driving circuit scans in the forward direction, the detection signal selection circuit outputs the scan driving signal output by the first-stage driving unit, and is reversed in the scan driving circuit. At the time of scanning, the detection signal selection circuit outputs the scan driving signal output from the last stage driving unit.

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Abstract

本申请公开了一种检测信号选择电路、阵列基板、显示面板,该选择电路包括:第一开关单元和第二开关单元,第一开关单元包括第一控制端、第一输入端和第一输出端,第二开关单元包括第二控制端、第二输入端和第二输出端,第一输出端和第二输出端连接,第一输入端连接第一级驱动单元的输出端,第二输入端连接最后一级驱动单元的输出端;其中,第一控制端输入的第一控制信号控制第一开关单元的开关,第二控制端输入的第二控制信号控制第二开关单元的开关,以根据扫描驱动信号的输出顺序选择性地输出第一输出端或第二输出端的输出信号。通过上述方式,本申请能够实现在双向扫描时,均能够选择最后一个输出的扫描驱动信号进行输出。

Description

检测信号选择电路、阵列基板、显示面板
【技术领域】
本发明涉及显示器技术领域,特别是涉及一种检测信号选择电路、阵列基板、显示面板。
【背景技术】
现有显示装置通常设置有扫描驱动电路,用于输出扫描驱动信号驱动像素电路工作。扫描驱动电路通常具有多级驱动单元,每一级驱动单元会输出一个扫描驱动信号,通过检测该扫描驱动电路输出的第一个和最后一个扫描驱动信号之间的差异,可以判断该扫描驱动电路是否出现问题。现有的检测方式是将最后一级扫描驱动电路的输出端连接到一个输出端,通过示波器检测输出信号是否异常,但是,该方式只适用于单向扫描的显示装置,当显示装置是双向扫描时,现有方式只能满足一个扫描方向的检测。
【发明内容】
本申请主要解决的技术问题是提供一种检测信号选择电路及选择方法、阵列基板、显示面板,能够解决现有检测方式只适用于单向扫描的显示装置的问题。
为解决上述技术问题,本申请采用的一个技术方案是:提供一种检测信号选择电路,该检测信号选择电路应用于显示面板的扫描驱动电路,该扫描驱动电路包括多级驱动单元,每一级驱动单元输出一个扫描驱动信号,该检测信号选择电路包括:第一开关单元和第二开关单元,第一开关单元包括第一控制端、第一输入端和第一输出端,第二开关单元包括第二控制端、第二输入端和第二输出端,第一输出端和第二输出端连接,第一输入端连接第一级驱动单元的输出端,第二输入端连接最后一级驱动单元的输出端;其中,第一控制端输入的第一控制信号控制第一开关单元的开关,第二控制端输入的第二控制信号控制第二开关单元的开关,以根据扫描驱动信号的输出顺序选择性地输出第一输出端或第二输出端的输出信号;第一开关单元包括第一薄膜晶体管,第一薄膜晶体管包括第一栅极、第一源极和第一漏极,第一栅极连接第一控制端,第一源极或第一漏极连接第一输入端,第一源极或第一漏极中另一极连接第一输出端;第二开关单元包括第二薄膜晶体管,第二薄膜晶体管包括第二栅极、第二源极和第二漏极,第二栅极连接第二控制端,第二源极或第二漏极连接第二输入端,第二源极或第二漏极中另一极连接第二输出端。
为解决上述技术问题,本申请采用的另一个技术方案是:提供一种阵列基板,包括:相互连接的扫描驱动电路和检测信号选择电路;其中,扫描驱动电路包括多级驱动单元,每一级驱动单元输出一个扫描驱动信号,检测信号选择电路包括:第一开关单元和第二开关单元,第一开关单元包括第一控制端、第一输入端和第一输出端,第二开关单元包括第二控制端、第二输入端和第二输出端,第一输出端和第二输出端连接,第一输入端连接第一级驱动单元的输出端,第二输入端连接最后一级驱动单元的输出端;其中,第一控制端输入的第一控制信号控制第一开关单元的开关,第二控制端输入的第二控制信号控制第二开关单元的开关,以根据扫描驱动信号的输出顺序选择性地输出第一输出端或第二输出端的输出信号。
为解决上述技术问题,本申请采用的又一个技术方案是:提供一种显示面板,其中,至少包括如上所述的阵列基板。
本申请的有益效果是:区别于现有技术的情况,本申请的部分实施例中的检测信号选择电路通过第一开关单元和第二开关单元的选择性开关,可以根据扫描驱动信号的输出顺序选择性地输出第一输出端或第二输出端的输出信号,其中该第一输出端的输出信号为第一级驱动单元输出的扫描驱动信号,该第二输出端的输出信号为最后一级驱动单元输出的扫描驱动信号,则该检测信号选择电路可以在正向扫描时,即扫描驱动信号的输出顺序为从第一级至最后一级输出时,选择该第二开关单元打开,输出该最后一级驱动单元输出的扫描驱动信号,而在反向扫描时,则可以选择第一开关单元打开,输出第一级驱动单元输出的扫描驱动信号,从而实现双向扫描时均能够输出最后一个输出的扫描驱动信号,进而可以实现双向扫描的扫描驱动电路检测。
【附图说明】
图1是本申请检测信号选择电路第一实施例的电路结构示意图;
图2是本申请检测信号选择电路第二实施例的电路结构示意图;
图3是本申请阵列基板一实施例的结构示意图;
图4是图3中级传信号输出电路的具体电路结构示意图;
图5是本申请显示面板一实施例的结构示意图;
图6是本申请检测信号的选择方法一实施例的流程示意图。
【具体实施方式】
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
如图1所示,本申请检测信号选择电路10第一实施例包括:第一开关单元101和第二开关单元102。
该检测信号选择电路10应用于显示面板的扫描驱动电路,可以将每一次扫描时输出的最后一个扫描驱动信号输出进行检测,从而在初始输出的扫描驱动电信号和最后一个扫描驱动信号差异过大时,可以对扫描驱动电路进行检修。如图1所示,扫描驱动电路30包括多级(n级)驱动单元301,每一级驱动单元301输出一个扫描驱动信号。
第一开关单元101包括第一控制端D2U、第一输入端G1和第一输出端Out1,第二开关单元102包括第二控制端U2D、第二输入端Gn和第二输出端Out2,其中第一输出端Out1和第二输出端Out2连接形成最终的输出端,第一输入端G1连接第一级驱动单元301的输出端,第二输入端Gn连接最后一级驱动单元301的输出端。
其中,第一控制端D2U输入的第一控制信号控制第一开关单元101的开关,第二控制端U2D输入的第二控制信号控制第二开关单元102的开关,以根据扫描驱动信号的输出顺序选择性地输出第一输出端Out1或第二输出端Out2的输出信号。
该第一开关单元101可以包括受控开关元件,例如薄膜晶体管等。
具体地,当该扫描驱动电路30是正向扫描时,即该扫描驱动信号的输出顺序是从第一级至最后一级驱动单元输出时,利用该第二控制端U2D输入的第二控制信号控制第二开关单元102打开,同时该第一控制端D2U输入的第一控制信号控制第一开关单元101关闭,此时该第一输出端Out1不输出第一级驱动单元输出的扫描驱动信号G1,该第二输出端Out2可以输出最后一级驱动单元输出的扫描驱动信号Gn。而当扫描驱动电路30是反向扫描时,即该扫描驱动信号的输出顺序是从最后一级至第一级驱动单元输出时,利用该第一控制端D2U输入的第一控制信号控制第一开关单元101打开,同时该第二控制端U2D输入的第二控制信号控制第二开关单元102关闭,此时该第一输出端Out1可以输出第一级驱动单元输出的扫描驱动信号G1,该第二输出端Out2不输出最后一级驱动单元输出的扫描驱动信号Gn。由此,该检测信号选择电路10可以实现在双向扫描时,均能够选择最后一个输出的扫描驱动信号进行输出,以便于后续对扫描驱动信号的检测,有利于检测出扫描驱动电路的异常,从而实现及时检修。
本实施例中,该检测信号选择电路可以应用于栅极扫描驱动电路(Scan GOA),也可以应用于发光像素驱动电路(EM GOA),此处不做具体限定。
本申请的检测信号选择电路中,该第一开关单元和第二开关单元可以均采用薄膜晶体管。
具体如图2所示,本申请检测信号选择电路第二实施例与本申请检测信号选择电路第一实施例的结构类似,不同之处在于,本实施例的检测信号选择电路20中,第一开关单元101包括第一薄膜晶体管T1,第一薄膜晶体管T1包括第一栅极B1、第一源极S1和第一漏极D1,第一栅极B1连接第一控制端D2U,第一源极S1连接第一输入端G1,第一漏极D1连接第一输出端Out1。
第二开关单元102包括第二薄膜晶体管T2,第二薄膜晶体管T2包括第二栅极B2、第二源极S2和第二漏极D2,第二栅极B2连接第二控制端U2D,第二源极S2连接第二输入端Gn,第二漏极D2连接第二输出端Out2。
其中,该第一源极S1和第一漏极D1也可以互换,该第二源极S2和第二漏极D2也可以互换。该第一薄膜晶体管T1和该第二薄膜晶体管T2可以均采用PMOS管或NMOS管,也可以一个采用PMOS管,一个采用NMOS管,此处不做具体限定。
具体地,在一个应用例中,如图2所示,第一薄膜晶体管T1和第二薄膜晶体管T2均采用PMOS管,当该扫描驱动电路30是正向扫描时,即该扫描驱动信号的输出顺序是从第一级至最后一级驱动单元输出时,该第二控制端U2D输入的第二控制信号为低电平信号,控制第二薄膜晶体管T2打开,同时该第一控制端D2U输入的第一控制信号为高电平信号,控制第一薄膜晶体管T1关闭,此时该第一输出端Out1不输出第一级驱动单元输出的扫描驱动信号G1,该第二输出端Out2可以输出最后一级驱动单元输出的扫描驱动信号Gn。而当扫描驱动电路30是反向扫描时,即该扫描驱动信号的输出顺序是从最后一级至第一级驱动单元输出时,该第一控制端D2U输入的第一控制信号为低电平信号,控制第一薄膜晶体管T1打开,同时该第二控制端U2D输入的第二控制信号为高电平信号,控制第二薄膜晶体管T2关闭,此时该第一输出端Out1可以输出第一级驱动单元输出的扫描驱动信号G1,该第二输出端Out2不输出最后一级驱动单元输出的扫描驱动信号Gn。由此,该检测信号选择电路10可以实现在双向扫描时,均能够选择最后一个输出的扫描驱动信号进行输出,以便于后续对扫描驱动信号的检测,有利于检测出扫描驱动电路的异常,从而实现及时检修。
在其他实施例中,该第一开关单元和第二开关单元也可以采用其他开关元件,此处不做具体限定。
如图3所示,本申请阵列基板一实施例包括:相互连接的扫描驱动电路401和检测信号选择电路402;
其中,扫描驱动电路401包括多级驱动单元4011,每一级驱动单元4011输出一个扫描驱动信号,该检测信号选择电路402可以参考本申请检测信号选择电路第一或第二实施例的电路,此处不再重复。
可选地,本实施例中,该阵列基板进一步包括:第一电源信号输入端VGH、第二电源信号输入端VGL、第一时钟信号输入端CK、第二时钟信号输入端XCK以及级传信号输出电路403。
每一级驱动单元4011包括级传信号输入端ST、第一驱动输入端V1、第二驱动输入端V2、第一时钟输入端CK1、第二时钟输入端CK2和至少一个驱动信号输出端G1或G2或……Gn,级传信号输入端ST连接级传信号输出电路403,第一驱动输入端V1连接第一电源信号输入端VGH,第二驱动输入端V2连接第二电源信号输入端VGL,第一时钟输入端CK1连接第一时钟信号输入端CK,第二时钟输入端CK2连接第二时钟信号输入端XCK,驱动信号输出端G1或G2或……Gn输出扫描驱动信号;其中,第一级驱动单元4011的该驱动信号输出端G1连接检测信号选择电路402的第一开关单元的输入端,最后一级驱动单元4011的该驱动信号输出端Gn连接检测信号选择电路402的第二开关单元的输入端。
其中,该第一电源信号输入端VGH输入的第一电源信号为高电平信号,该第二电源输入端VGL输入的第二电源信号为低电平信号,第二时钟信号输入端XCK输入的第二时钟信号是该第一时钟信号输入端CK输入的第一时钟信号的反向信号。
本实施例中,该驱动单元可以采用现有的双向扫描驱动电路,此处不做具体限定。
可选地,本实施例的阵列基板还包括:初始级传信号输入端STV,该级传信号输出电路403包括多级级传信号输出单元4031,每一级级传信号输出单元4031包括级传信号第一输入端STV1、级传信号第二输入端STV2、级传信号第三输入端STV3、级传信号第四输入端STV4和级传信号输出端STVO,该级传信号第一输入端STV1连接前一级驱动单元4011的输出端Gn-1,级传信号第二输入端STV2连接第一控制信号输入端D2U,级传信号第三输入端STV3连接第二控制信号输入端U2D,级传信号第四输入端STV4连接下一级驱动单元4011的输出端Gn+1,级传信号输出端STVO连接对应级驱动单元4011的级传信号输入端ST。
其中,由于第一级级传信号输出单元没有对应的前一级驱动单元,最后一级级传信号输出单元也没有对应的下一级驱动单元,因此该第一级级传信号输出单元4031的级传信号第一输入端STV1和最后一级级传信号输出单元4031的级传信号第四输入端STV4均连接初始级传信号输入端STV。
该级传信号输出电路403用于向对应的每一级驱动单元4011输出级传信号。其中,当该扫描驱动电路401正向扫描时,该第一级级传信号输出单元输出的级传信号为该初始级传信号输入端输入的级传信号STV,而当该驱动电路401反向扫描时,该最后一级级传信号输出单元输出的级传信号为该初始级传信号输入端输入的级传信号STV。
可选地,级传信号输出单元4011可以采用如图4(a)所示的电路,该级传信号输出单元4011包括第三薄膜晶体管T3和第四薄膜晶体管T4,第三薄膜晶体管T3包括第三栅极B3、第三源极S3和第三漏极D3,第三栅极B3连接级传信号第三输入端STV3,即输入第二控制信号U2D,第三源极S3连接级传信号第一输入端STV1,即输入对应的前一级驱动单元输出的扫描驱动信号Gn-1,第四薄膜晶体管T4包括第四栅极B4、第四源极S4和第四漏极D4,第四栅极B4连接级传信号第二输入端STV2,即输入第一控制信号D2U,第四源极S4连接级传信号第四输入端STV4,即输入对应的下一级驱动单元输出的扫描驱动信号Gn+1,第三漏极以及第四漏极连接级传信号输出端STVO,用于输出级传信号。
其中,该第三源极S3和第三漏极D3也可以互换,该第四源极S4和第四漏极D4也可以互换。该第三薄膜晶体管T3和第四薄膜晶体管T4可以均采用PMOS管或NMOS管。
具体地,在一个应用例中,该第三薄膜晶体管T3和第四薄膜晶体管T4均采用PMOS管,在该扫描驱动电路401正向扫描时,U2D输出低电平信号,T3管导通,D2U输出高电平信号,T4管截止,只有Gn-1信号输出,而在扫描驱动电路401反向扫描时,U2D输出低电平信号,T4管导通,T3管截止,只有Gn+1信号输出。
可选地,级传信号输出单元4011也可以采用如图4(b)所示的电路结构,该级传信号输出单元4011包括第五薄膜晶体管T5和第六薄膜晶体管T6,第五薄膜晶体管T5包括第五栅极B5、第五源极S5和第五漏极D5,第五栅极B5连接级传信号第一输入端STV1,即输入对应的前一级驱动单元输出的扫描驱动信号Gn-1,第五源极S5连接级传信号第三输入端STV3,即输入第二控制信号U2D,第六薄膜晶体管T6包括第六栅极B6、第六源极S6和第六漏极D6,第六栅极B6连接级传信号第四输入端STV2,即输入对应的下一级驱动单元输出的扫描驱动信号Gn+1,第六源极S6连接级传信号第二输入端,即输入第一控制信号D2U,第五漏极D5以及第六漏极D6连接级传信号输出端STVO,用于输出级传信号。
其中,该第五源极S5和第五漏极D5也可以互换,该第六源极S6和第六漏极D6也可以互换。该第五薄膜晶体管T5和第六薄膜晶体管T6可以均采用PMOS管或NMOS管。T5和T6的工作过程与T3和T4类似,此处不再重复。
如图5所示,本申请显示面板50一实施例至少包括:阵列基板501,该阵列基板501可以参考本申请阵列基板一实施例的结构,此次不再赘述。其中,该显示面板50可以是OLED(Organic Light Emitting Display,有机发光显示器),例如AMOLED(Active Matrix Organic Light Emitting Display,主动矩阵有机发光显示器),也可以是LCD(Liquid Crystal Display,液晶显示器)。
本实施例中,还可以根据显示面板的类型,进一步包括彩膜基板、液晶或其他部件,此次不做具体限定。
本实施例中,该显示面板的阵列基板中,检测信号选择电路通过第一开关单元和第二开关单元的选择性开关,可以根据扫描驱动信号的输出顺序选择性地输出第一输出端或第二输出端的输出信号,其中该第一输出端的输出信号为第一级驱动单元输出的扫描驱动信号,该第二输出端的输出信号为最后一级驱动单元输出的扫描驱动信号,则该检测信号选择电路可以在正向扫描时,即扫描驱动信号的输出顺序为从第一级至最后一级输出时,选择该第二开关单元打开,输出该最后一级驱动单元输出的扫描驱动信号,而在反向扫描时,则可以选择第一开关单元打开,输出第一级驱动单元输出的扫描驱动信号,从而实现双向扫描时均能够输出最后一个输出的扫描驱动信号,进而可以实现双向扫描的扫描驱动电路检测。
如图6所示,本申请检测信号的选择方法一实施例应用于如本申请阵列基板一实施例所提供的阵列基板,本实施例中,该选择方法包括:
S101:获取扫描驱动电路输出的扫描驱动信号的输出顺序;
S102:根据该输出顺序输出第一控制信号和第二控制信号,以使得扫描驱动电路正向扫描时,检测信号选择电路输出第一级驱动单元输出的扫描驱动信号,且在扫描驱动电路反向扫描时,检测信号选择电路输出最后一级驱动单元输出的扫描驱动信号。
上述步骤的具体实施过程可以参考本申请阵列基板一实施例中检测信号选择电路的工作过程,也可以参考本申请检测信号选择电路第一或第二实施例的内容,此处不再重复。
以上所述仅为本申请的实施方式,并非因此限制本申请的专利范围,凡是利用本申请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,均同理包括在本申请的专利保护范围内。

Claims (20)

  1. 一种检测信号选择电路,所述检测信号选择电路应用于显示面板的扫描驱动电路,所述扫描驱动电路包括多级驱动单元,每一级驱动单元输出一个扫描驱动信号,其中,所述检测信号选择电路包括:
    第一开关单元和第二开关单元,所述第一开关单元包括第一控制端、第一输入端和第一输出端,所述第二开关单元包括第二控制端、第二输入端和第二输出端,所述第一输出端和所述第二输出端连接,所述第一输入端连接第一级所述驱动单元的输出端,所述第二输入端连接最后一级所述驱动单元的输出端;
    其中,所述第一控制端输入的第一控制信号控制所述第一开关单元的开关,所述第二控制端输入的第二控制信号控制所述第二开关单元的开关,以根据所述扫描驱动信号的输出顺序选择性地输出所述第一输出端或所述第二输出端的输出信号;
    所述第一开关单元包括第一薄膜晶体管,所述第一薄膜晶体管包括第一栅极、第一源极和第一漏极,所述第一栅极连接所述第一控制端,所述第一源极或所述第一漏极连接所述第一输入端,所述第一源极或所述第一漏极中另一极连接所述第一输出端;
    所述第二开关单元包括第二薄膜晶体管,所述第二薄膜晶体管包括第二栅极、第二源极和第二漏极,所述第二栅极连接所述第二控制端,所述第二源极或所述第二漏极连接所述第二输入端,所述第二源极或所述第二漏极中另一极连接所述第二输出端。
  2. 根据权利要求1所述的检测信号选择电路,其中,所述扫描驱动电路是栅极扫描驱动电路或发光像素驱动电路。
  3. 根据权利要求1所述的检测信号选择电路,其中,所述第一薄膜晶体管是PMOS管或NMOS管。
  4. 根据权利要求1所述的检测信号选择电路,其中,所述第二薄膜晶体管是PMOS管或NMOS管。
  5. 一种阵列基板,其中,包括:相互连接的扫描驱动电路和检测信号选择电路;
    其中,所述扫描驱动电路包括多级驱动单元,每一级驱动单元输出一个扫描驱动信号;
    所述检测信号选择电路包括:第一开关单元和第二开关单元,所述第一开关单元包括第一控制端、第一输入端和第一输出端,所述第二开关单元包括第二控制端、第二输入端和第二输出端,所述第一输出端和所述第二输出端连接,所述第一输入端连接第一级所述驱动单元的输出端,所述第二输入端连接最后一级所述驱动单元的输出端;
    其中,所述第一控制端输入的第一控制信号控制所述第一开关单元的开关,所述第二控制端输入的第二控制信号控制所述第二开关单元的开关,以根据所述扫描驱动信号的输出顺序选择性地输出所述第一输出端或所述第二输出端的输出信号。
  6. 根据权利要求5所述的阵列基板,其中,所述第一开关单元包括第一薄膜晶体管,所述第一薄膜晶体管包括第一栅极、第一源极和第一漏极,所述第一栅极连接所述第一控制端,所述第一源极或所述第一漏极连接所述第一输入端,所述第一源极或所述第一漏极中另一极连接所述第一输出端。
  7. 根据权利要求5所述的阵列基板,其中,所述第二开关单元包括第二薄膜晶体管,所述第二薄膜晶体管包括第二栅极、第二源极和第二漏极,所述第二栅极连接所述第二控制端,所述第二源极或所述第二漏极连接所述第二输入端,所述第二源极或所述第二漏极中另一极连接所述第二输出端。
  8. 根据权利要求5所述的阵列基板,其中,进一步包括:第一电源信号输入端、第二电源信号输入端、第一时钟信号输入端、第二时钟信号输入端以及级传信号输出电路;每一级所述驱动单元包括级传信号输入端、第一驱动输入端、第二驱动输入端、第一时钟输入端、第二时钟输入端和驱动信号输出端,所述级传信号输入端连接所述级传信号输出电路,所述第一驱动输入端连接所述第一电源信号输入端,所述第二驱动输入端连接所述第二电源信号输入端,所述第一时钟输入端连接所述第一时钟信号输入端,所述第二时钟输入端连接所述第二时钟信号输入端,所述驱动信号输出端输出所述扫描驱动信号;
    其中,所述第一电源信号输入端输入的第一电源信号和所述第二电源输入端输入的第二电源信号的电位相反,所述第一时钟信号输入端输入的第一时钟信号和所述第二时钟信号输入端输入的第二时钟信号的电位相反。
  9. 根据权利要求8所述的阵列基板,其中,进一步包括:初始级传信号输入端;
    所述级传信号输出电路包括多级级传信号输出单元,每一级级传信号输出单元包括级传信号第一输入端、级传信号第二输入端、级传信号第三输入端、级传信号第四输入端和级传信号输出端,所述级传信号第一输入端连接前一级所述驱动单元的输出端,所述级传信号第二输入端连接所述第一控制信号输入端,所述级传信号第三输入端连接所述第二控制信号输入端,所述级传信号第四输入端连接下一级所述驱动单元的输出端,所述级传信号输出端连接对应级驱动单元的所述级传信号输入端;
    其中,第一级所述级传信号输出单元的级传信号第一输入端和最后一级所述级传信号输出单元的级传信号第四输入端均连接所述初始级传信号输入端。
  10. 根据权利要求9所述的阵列基板,其中,所述级传信号输出单元包括第三薄膜晶体管和第四薄膜晶体管,所述第三薄膜晶体管包括第三栅极、第三源极和第三漏极,所述第三栅极连接所述级传信号第三输入端,所述第三源极或所述第三漏极连接所述级传信号第一输入端,所述第四薄膜晶体管包括第四栅极、第四源极和第四漏极,所述第四栅极连接所述级传信号第二输入端,所述第四源极或所述第四漏极连接所述级传信号第四输入端,所述第三源极和所述第三漏极中另一极以及所述第四源极或所述第四漏极中另一极连接所述级传信号输出端。
  11. 根据权利要求9所述的阵列基板,其中,所述级传信号输出单元包括第五薄膜晶体管和第六薄膜晶体管,所述第五薄膜晶体管包括第五栅极、第五源极和第五漏极,所述第五栅极连接所述级传信号第一输入端,所述第五源极或所述第五漏极连接所述级传信号第三输入端,所述第六薄膜晶体管包括第六栅极、第六源极和第六漏极,所述第六栅极连接所述级传信号第四输入端,所述第六源极或所述第六漏极连接所述级传信号第二输入端,所述第五源极和所述第五漏极中另一极以及所述第六源极或所述第六漏极中另一极连接所述级传信号输出端。
  12. 根据权利要求5所述的阵列基板,其中,所述扫描驱动电路是栅极扫描驱动电路或发光像素驱动电路。
  13. 根据权利要求5所述的阵列基板,其中,所述第一薄膜晶体管或所述第二薄膜晶体管是PMOS管或NMOS管。
  14. 一种显示面板,其中,至少包括一阵列基板;
    所述阵列基板包括:相互连接的扫描驱动电路和检测信号选择电路;
    其中,所述扫描驱动电路包括多级驱动单元,每一级驱动单元输出一个扫描驱动信号;
    所述检测信号选择电路包括:第一开关单元和第二开关单元,所述第一开关单元包括第一控制端、第一输入端和第一输出端,所述第二开关单元包括第二控制端、第二输入端和第二输出端,所述第一输出端和所述第二输出端连接,所述第一输入端连接第一级所述驱动单元的输出端,所述第二输入端连接最后一级所述驱动单元的输出端;
    其中,所述第一控制端输入的第一控制信号控制所述第一开关单元的开关,所述第二控制端输入的第二控制信号控制所述第二开关单元的开关,以根据所述扫描驱动信号的输出顺序选择性地输出所述第一输出端或所述第二输出端的输出信号。
  15. 根据权利要求14所述的显示面板,其中,所述第一开关单元包括第一薄膜晶体管,所述第一薄膜晶体管包括第一栅极、第一源极和第一漏极,所述第一栅极连接所述第一控制端,所述第一源极或所述第一漏极连接所述第一输入端,所述第一源极或所述第一漏极中另一极连接所述第一输出端。
  16. 根据权利要求14所述的显示面板,其中,所述第二开关单元包括第二薄膜晶体管,所述第二薄膜晶体管包括第二栅极、第二源极和第二漏极,所述第二栅极连接所述第二控制端,所述第二源极或所述第二漏极连接所述第二输入端,所述第二源极或所述第二漏极中另一极连接所述第二输出端。
  17. 根据权利要求16所述的显示面板,其中,所述阵列基板进一步包括:第一电源信号输入端、第二电源信号输入端、第一时钟信号输入端、第二时钟信号输入端以及级传信号输出电路;每一级所述驱动单元包括级传信号输入端、第一驱动输入端、第二驱动输入端、第一时钟输入端、第二时钟输入端和驱动信号输出端,所述级传信号输入端连接所述级传信号输出电路,所述第一驱动输入端连接所述第一电源信号输入端,所述第二驱动输入端连接所述第二电源信号输入端,所述第一时钟输入端连接所述第一时钟信号输入端,所述第二时钟输入端连接所述第二时钟信号输入端,所述驱动信号输出端输出所述扫描驱动信号;
    其中,所述第一电源信号输入端输入的第一电源信号和所述第二电源输入端输入的第二电源信号的电位相反,所述第一时钟信号输入端输入的第一时钟信号和所述第二时钟信号输入端输入的第二时钟信号的电位相反。
  18. 根据权利要求16所述的显示面板,其中,所述阵列基板进一步包括:初始级传信号输入端;
    所述级传信号输出电路包括多级级传信号输出单元,每一级级传信号输出单元包括级传信号第一输入端、级传信号第二输入端、级传信号第三输入端、级传信号第四输入端和级传信号输出端,所述级传信号第一输入端连接前一级所述驱动单元的输出端,所述级传信号第二输入端连接所述第一控制信号输入端,所述级传信号第三输入端连接所述第二控制信号输入端,所述级传信号第四输入端连接下一级所述驱动单元的输出端,所述级传信号输出端连接对应级驱动单元的所述级传信号输入端;
    其中,第一级所述级传信号输出单元的级传信号第一输入端和最后一级所述级传信号输出单元的级传信号第四输入端均连接所述初始级传信号输入端。
  19. 根据权利要求18所述的显示面板,其中,所述级传信号输出单元包括第三薄膜晶体管和第四薄膜晶体管,所述第三薄膜晶体管包括第三栅极、第三源极和第三漏极,所述第三栅极连接所述级传信号第三输入端,所述第三源极或所述第三漏极连接所述级传信号第一输入端,所述第四薄膜晶体管包括第四栅极、第四源极和第四漏极,所述第四栅极连接所述级传信号第二输入端,所述第四源极或所述第四漏极连接所述级传信号第四输入端,所述第三源极和所述第三漏极中另一极以及所述第四源极或所述第四漏极中另一极连接所述级传信号输出端。
  20. 根据权利要求18所述的显示面板,其中,所述级传信号输出单元包括第五薄膜晶体管和第六薄膜晶体管,所述第五薄膜晶体管包括第五栅极、第五源极和第五漏极,所述第五栅极连接所述级传信号第一输入端,所述第五源极或所述第五漏极连接所述级传信号第三输入端,所述第六薄膜晶体管包括第六栅极、第六源极和第六漏极,所述第六栅极连接所述级传信号第四输入端,所述第六源极或所述第六漏极连接所述级传信号第二输入端,所述第五源极和所述第五漏极中另一极以及所述第六源极或所述第六漏极中另一极连接所述级传信号输出端。
PCT/CN2018/096198 2018-04-28 2018-07-19 检测信号选择电路、阵列基板、显示面板 WO2019205304A1 (zh)

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CN104932134A (zh) * 2015-06-30 2015-09-23 厦门天马微电子有限公司 一种触控显示基板
CN107274832A (zh) * 2017-08-15 2017-10-20 深圳市华星光电半导体显示技术有限公司 驱动电路及显示装置

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