WO2019015058A1 - 放电信号触发电路及显示装置 - Google Patents

放电信号触发电路及显示装置 Download PDF

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Publication number
WO2019015058A1
WO2019015058A1 PCT/CN2017/101178 CN2017101178W WO2019015058A1 WO 2019015058 A1 WO2019015058 A1 WO 2019015058A1 CN 2017101178 W CN2017101178 W CN 2017101178W WO 2019015058 A1 WO2019015058 A1 WO 2019015058A1
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WIPO (PCT)
Prior art keywords
signal
voltage dividing
dividing module
display device
discharge signal
Prior art date
Application number
PCT/CN2017/101178
Other languages
English (en)
French (fr)
Inventor
张先明
Original Assignee
深圳市华星光电半导体显示技术有限公司
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Application filed by 深圳市华星光电半导体显示技术有限公司 filed Critical 深圳市华星光电半导体显示技术有限公司
Priority to EP17918371.0A priority Critical patent/EP3657490B1/en
Priority to KR1020207004481A priority patent/KR102378730B1/ko
Priority to JP2020500615A priority patent/JP6942237B2/ja
Priority to US15/576,806 priority patent/US20190019446A1/en
Publication of WO2019015058A1 publication Critical patent/WO2019015058A1/zh

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Classifications

    • 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
    • G09G3/3696—Generation of voltages supplied to electrode 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0248—Precharge or discharge of column electrodes before or after applying exact column voltages
    • 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
    • G09G2310/0243—Details of the generation of driving signals
    • G09G2310/0251—Precharge or discharge of pixel before applying new pixel voltage
    • 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
    • G09G2310/06—Details of flat display driving waveforms
    • G09G2310/061—Details of flat display driving waveforms for resetting or blanking
    • 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
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/026—Arrangements or methods related to booting a display
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/027—Arrangements or methods related to powering off a display
    • 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
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
    • G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
    • G09G3/3266—Details of drivers for scan electrodes
    • 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
    • G09G3/3406—Control of illumination source
    • 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

Definitions

  • the present invention relates to the field of display technologies, and in particular, to a discharge signal trigger circuit and a display device.
  • the existing Discharge function is triggered by detecting that the driving voltage VCC of the display device is turned off, but the existing driving voltage VCC is very fast when the display device stops working, and the Discharge function may not provide sufficient energy. All the scanning signals are pulled to the preset potential, especially the preset high potential, so that the discharge effect of the Discharge function of the existing display device is not ideal, which may cause abnormal function when the display device is turned on.
  • An object of the present invention is to provide a discharge signal triggering circuit and a display device capable of effectively performing a discharge reset operation on a scan signal of a pixel unit of a display device, so as to solve the discharge effect of the discharge function of the conventional display device, the discharge effect may be unsatisfactory.
  • Embodiments of the present invention provide a discharge signal trigger circuit, including:
  • a first voltage dividing module one end is connected to the driving voltage source, and the other end is respectively connected to the discharge signal triggering end and the second voltage dividing module;
  • the discharge signal trigger terminal is configured to output a discharge signal
  • a second voltage dividing module one end is connected to the firing signal triggering end, and the other end is grounded;
  • the resistance value of the first voltage dividing module is adjusted by a backlight closing signal or a display device closing signal, so that the discharging signal triggering end outputs the discharging signal;
  • the second voltage dividing module is a fixed resistor
  • the discharge signal triggering end When the resistance value of the first voltage dividing module is greater than a set value, the discharge signal triggering end outputs the discharging signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the backlight closing signal, the first voltage dividing module includes a first resistor and a first switch. tube;
  • One end of the first resistor is connected to the driving voltage source, and the other end of the first resistor is connected to an input end of the first switching tube, and an output end of the first switching tube is triggered by the discharge signal
  • the terminal is connected, and the control end of the first switch tube inputs a backlight off signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the display device closing signal, the first voltage dividing module includes receiving the display a photoresistor that turns off the signal of the device;
  • One end of the photoresistor is connected to the driving voltage source, and the other end of the photoresistor is connected to the firing signal triggering end.
  • the display device drive circuit corresponding to the discharge signal trigger circuit includes a rectifier module, and the rectifier module includes:
  • a rectifier bridge the input end of the rectifier bridge inputs an alternating voltage; the first output end and the second output end of the rectifier bridge output a direct current voltage;
  • a positive pole of the light emitting diode is connected to a first output end of the rectifier bridge, and a negative pole of the light emitting diode is grounded to generate the display device off signal;
  • An isolation diode a cathode of the isolation diode is connected to a first output end of the rectifier bridge, and a cathode of the isolation diode is connected to one end of the storage capacitor;
  • the embodiment of the invention also provides a discharge signal triggering circuit, which includes:
  • a first voltage dividing module one end is connected to the driving voltage source, and the other end is respectively connected to the discharge signal triggering end and the second voltage dividing module;
  • the discharge signal trigger end is configured to output a discharge signal
  • a second voltage dividing module one end is connected to the firing signal triggering end, and the other end is grounded;
  • the resistance value of the first voltage dividing module is adjusted by a backlight closing signal or a display device closing signal, so that the discharging signal triggering end outputs the discharging signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the backlight closing signal, the first voltage dividing module includes a first resistor and a first switch. tube;
  • One end of the first resistor is connected to the driving voltage source, and the other end of the first resistor is connected to an input end of the first switching tube, and an output end of the first switching tube is triggered by the discharge signal
  • the terminal is connected, and the control end of the first switch tube inputs a backlight off signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the display device closing signal, the first voltage dividing module includes receiving the display a photoresistor that turns off the signal of the device;
  • One end of the photoresistor is connected to the driving voltage source, and the other end of the photoresistor is connected to the firing signal triggering end.
  • the display device drive circuit corresponding to the discharge signal trigger circuit includes a rectifier module, and the rectifier module includes:
  • a rectifier bridge the input end of the rectifier bridge inputs an alternating voltage; the first output end and the second output end of the rectifier bridge output a direct current voltage;
  • a positive pole of the light emitting diode is connected to a first output end of the rectifier bridge, and a negative pole of the light emitting diode is grounded to generate the display device off signal;
  • An isolation diode a cathode of the isolation diode is connected to a first output end of the rectifier bridge, and a cathode of the isolation diode is connected to one end of the storage capacitor;
  • the second voltage dividing module is a fixed resistor.
  • the discharging signal triggering end when the resistance value of the first voltage dividing module is greater than a set value, the discharging signal triggering end outputs the discharging signal.
  • the embodiment of the present invention further provides a display device including a discharge signal trigger circuit for performing a discharge reset operation on a scan signal corresponding to a pixel unit in the display device;
  • the discharge signal trigger circuit includes:
  • a first voltage dividing module one end is connected to the driving voltage source, and the other end is respectively connected to the discharge signal triggering end and the second voltage dividing module;
  • the discharge signal trigger terminal is configured to output a discharge signal
  • a second voltage dividing module one end is connected to the firing signal triggering end, and the other end is grounded;
  • the resistance value of the first voltage dividing module is adjusted by a backlight closing signal or a display device closing signal, so that the discharging signal triggering end outputs the discharging signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the backlight closing signal, the first voltage dividing module includes a first resistor and a first switching tube;
  • One end of the first resistor is connected to the driving voltage source, and the other end of the first resistor is connected to an input end of the first switching tube, and an output end of the first switching tube is triggered by the discharge signal
  • the terminal is connected, and the control end of the first switch tube inputs a backlight off signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the display device closing signal, the first voltage dividing module includes receiving the display device to be turned off. Photosensitive resistance of the signal;
  • One end of the photoresistor is connected to the driving voltage source, and the other end of the photoresistor is connected to the firing signal triggering end.
  • the driving circuit of the display device includes a rectification module, and the rectification module includes:
  • a rectifier bridge the input end of the rectifier bridge inputs an alternating voltage; the first output end and the second output end of the rectifier bridge output a direct current voltage;
  • a positive pole of the light emitting diode is connected to a first output end of the rectifier bridge, and a negative pole of the light emitting diode is grounded to generate the display device off signal;
  • An isolation diode a cathode of the isolation diode is connected to a first output end of the rectifier bridge, and a cathode of the isolation diode is connected to one end of the storage capacitor;
  • the second voltage dividing module is a fixed resistor.
  • the discharge signal triggering end when the resistance value of the first voltage dividing module is greater than a set value, the discharge signal triggering end outputs the discharging signal.
  • the discharge signal triggering circuit and the display device of the invention adjust the resistance value of the first voltage dividing module by the backlight closing signal or the display device closing signal, thereby realizing a stable discharge reset operation of the scanning signal of the pixel unit;
  • the discharge effect of the discharge function of some display devices is not ideal, which may cause technical problems in the abnormal function of the display device when it is turned on.
  • FIG. 1 is a schematic structural view of a discharge signal trigger circuit of the present invention
  • FIG. 2a is a schematic structural view of a first preferred embodiment of a discharge signal triggering circuit of the present invention
  • FIG. 2b is a schematic structural diagram of a rectifier module of a display device driving circuit corresponding to the first preferred embodiment of the discharge signal triggering circuit of the present invention
  • FIG. 3 is a schematic structural view of a second preferred embodiment of the discharge signal triggering circuit of the present invention.
  • FIG. 1 is a schematic structural diagram of a discharge signal trigger circuit of the present invention.
  • the discharge signal triggering circuit 10 includes a driving voltage source 11, a first voltage dividing module 12, a discharge signal triggering end 13, and a second voltage dividing module 14.
  • the driving voltage source 11 is used to generate a driving voltage of the display device; the first voltage dividing module 12 is connected to the driving voltage source 11 at one end, and the discharging signal triggering end 13 and the second voltage dividing module 14 are respectively connected to the other end; the discharging signal triggering end 13 It is used to output a discharge signal; one end of the second voltage dividing module 14 is connected to the discharge signal triggering end 13 and the other end is grounded.
  • the resistance value of the first voltage dividing module 12 is adjusted by the backlight closing signal or the display device closing signal, so that the discharging signal triggering end 13 outputs a discharging signal.
  • the second voltage dividing module 14 is preferably a fixed resistor 141.
  • the backlight off signal here refers to an electrical signal for turning off the backlight, which is generally triggered earlier than the driving voltage off signal, so the backlight off signal is used to trigger the discharge signal, so that the display device driving circuit has sufficient time to discharge the scan signal.
  • the reset operation improves the stability of the scan signal for the discharge reset operation.
  • the display device off signal here refers to an electrical signal caused by the physical switch of the display device, which is generally slightly earlier than the driving voltage off signal. Therefore, the display device off signal is used to trigger the discharge signal, and the display device driving circuit is also sufficient. The time discharges the scan signal to improve the stability of the scan signal for the discharge reset operation.
  • FIG. 2a is a schematic structural view of a first preferred embodiment of the discharge signal triggering circuit of the present invention
  • FIG. 2b is a display device driving circuit corresponding to the first preferred embodiment of the discharge signal triggering circuit of the present invention
  • Schematic diagram of the rectifier module
  • the first voltage dividing module When the resistance of the first voltage dividing module is adjusted by the display device closing signal, the first voltage dividing module includes a photoresistor 221 for receiving the display device shutdown signal; one end of the photoresistor 221 is connected to the driving voltage source VDD1. The other end of the photoresistor 221 is connected to the discharge signal trigger terminal DIS1.
  • the display device driving circuit corresponding to the discharge signal triggering circuit 20 includes a rectifying module 25.
  • the rectifier module 25 includes a rectifier bridge 251, a light emitting diode 252, an isolation diode 253, and a storage capacitor 254.
  • the input end of the rectifier bridge 251 inputs an AC voltage, and the first output end and the second output end of the rectifier bridge 251 output a DC voltage; the anode of the LED 252 is connected to the first output end of the rectifier bridge 251, and the cathode of the LED 252 is grounded.
  • the display device is turned off; the anode of the isolation diode 253 is connected to the first output of the rectifier bridge 251, the cathode of the isolation diode 253 is connected to one end of the storage capacitor 254, and the other end of the storage capacitor 254 is connected to the second output of the rectifier bridge 251. End connection.
  • the discharge signal triggering circuit 20 of the preferred embodiment when the display device driving circuit operates normally, the light emitting diode 252 emits light, and the photoresistor 221 of the first voltage dividing module of the discharging signal triggering circuit 20 is irradiated with light, and the resistance value is small. Or close to zero.
  • the resistance of the first voltage dividing module is less than or equal to the set value, so the discharge signal trigger terminal DIS1 outputs a higher voltage and does not trigger the discharge signal.
  • the input terminal of the rectifier bridge 251 of the rectifier module 25 stops inputting the AC voltage, and the output of the rectifier bridge 251 stops outputting the DC voltage.
  • the light-emitting diode 252 immediately stops emitting light, and the charge in the storage capacitor 254 can still keep the driving voltage VCC temporarily not turned off.
  • the photoresistor 221 of the first voltage dividing module of the discharge signal triggering circuit 20 is not irradiated with light, and the resistance value is increased, so that the resistance value of the first voltage dividing module is greater than the set value, and the output of the firing signal triggering terminal DIS1 is small.
  • the voltage signal triggers the discharge signal. Since the driving voltage VCC has not decreased when the discharge signal is triggered, the stability of the discharge reset operation of the scanning signal of the pixel unit can be ensured.
  • the discharge signal triggering circuit of the preferred embodiment adjusts the resistance value of the first voltage dividing module by the display device closing signal, thereby realizing a stable discharge reset operation of the scanning signal of the pixel unit.
  • FIG. 3 is a schematic structural diagram of a second preferred embodiment of the discharge signal triggering circuit of the present invention.
  • the first voltage dividing module When the resistance value of the first voltage dividing module is adjusted by the backlight closing signal, the first voltage dividing module includes a first resistor 321 and a first switching transistor 322; one end of the first resistor 321 is connected to the driving voltage source VDD2, The other end of a resistor 321 is connected to the input end of the first switch tube 322. The output end of the first switch tube 322 is connected to the discharge signal trigger terminal DIS2, and the control end of the first switch tube 322 is input with the backlight off signal BLON.
  • the discharge signal trigger circuit 30 of the preferred embodiment when the backlight module of the display device operates normally, the backlight off signal BLON inputs a high level signal, the first switch tube 322 is turned on, and the first point of the discharge signal trigger circuit 30 is The resistance value of the pressure module is small. The resistance of the first voltage dividing module is less than or equal to the set value, so the discharge signal trigger terminal DIS2 outputs a higher voltage and does not trigger the discharge signal.
  • the backlight off signal BLON inputs a low level signal
  • the first switch tube 322 is turned off
  • the resistance value of the first voltage dividing module of the discharge signal trigger circuit 30 is large.
  • the resistance value of the first voltage dividing module is greater than the set value, and the discharge signal trigger terminal DIS2 outputs a small voltage signal to trigger the discharging signal. Since the driving voltage VCC has not decreased when the backlight off signal is triggered, the stability of the discharge reset operation of the scanning signal of the pixel unit can be ensured.
  • the discharge signal triggering circuit of the present invention adjusts the resistance value of the first voltage dividing module by the backlight closing signal, thereby realizing a stable discharge reset operation of the scanning signal of the pixel unit.
  • the present invention also provides a display device including a discharge signal triggering circuit for performing a discharge reset operation on a scan signal corresponding to a pixel unit in the display device.
  • the discharge signal trigger circuit includes a driving voltage source, a first voltage dividing module, a discharge signal triggering end, and a second voltage dividing module.
  • the driving voltage source is used to generate a driving voltage of the display device; one end of the first voltage dividing module is connected to the driving voltage source, and the other end is respectively connected to the discharge signal triggering end and the second voltage dividing module; the discharging signal triggering end is used for outputting the discharging signal; One end of the second voltage dividing module is connected to the firing signal triggering end, and the other end is grounded.
  • the resistance value of the first voltage dividing module is adjusted by the backlight closing signal or the display device closing signal, so that the discharging signal triggering end outputs a discharging signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the backlight closing signal, the first voltage dividing module includes a first resistor and a first switching tube; one end of the first resistor is connected to the driving voltage source, first The other end of the resistor is connected to the input end of the first switch tube, the output end of the first switch tube is connected to the trigger end of the discharge signal, and the control end of the first switch tube inputs a backlight off signal.
  • the first voltage dividing module when the resistance value of the first voltage dividing module is adjusted by the display device closing signal, the first voltage dividing module includes a photoresistor for receiving the display device closing signal; one end of the photoresistor is connected to the driving voltage source, The other end of the photoresistor is connected to the firing signal trigger terminal.
  • the display device driving circuit corresponding to the discharge signal triggering circuit comprises a rectifying module.
  • the rectifier module includes a rectifier bridge, a light emitting diode, an isolation diode, and a storage capacitor.
  • the input end of the rectifier bridge inputs an AC voltage, and the first output end and the second output end of the rectifier bridge output a DC voltage; the anode of the LED is connected to the first output end of the rectifier bridge, and the cathode of the LED is grounded, and the display device is turned off.
  • the signal is connected; the anode of the isolation diode is connected to the first output end of the rectifier bridge, the cathode of the isolation diode is connected to one end of the storage capacitor, and the other end of the storage capacitor is connected to the second output end of the rectifier bridge.
  • the discharge signal triggering circuit and the display device of the invention adjust the resistance value of the first voltage dividing module by the backlight closing signal or the display device closing signal, thereby realizing a stable discharge reset operation of the scanning signal of the pixel unit;
  • the discharge effect of the discharge function of some display devices is not ideal, which may cause technical problems in the abnormal function of the display device when it is turned on.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种放电信号触发电路(10,20,30)及其显示装置，放电信号触发电路(10,20,30)包括驱动电压源(11)、第一分压模块(12)、放电信号触发端(13,DIS1,DIS2)以及第二分压模块(14)；其中通过背光关闭信号(BLON)或显示装置关闭信号，对第一分压模块(12)的阻值进行调整，以便放电信号触发端(13,DIS1,DIS2)输出放电信号。

Description

放电信号触发电路及显示装置 技术领域
本发明涉及显示技术领域，特别是涉及一种放电信号触发电路及显示装置。
 背景技术
随着科技的发展，人们对显示装置的功能要求越来越高，如对于某些显示装置，需要通过Discharge功能（放电功能）将所有的扫描信号拉到预设电位（如低电位或高电位等）。
现有的Discharge功能均通过检测显示装置的驱动电压VCC关闭来进行触发，但是现有的驱动电压VCC在显示装置停止工作时，电压下降速度非常快，这时Discharge功能可能无法提供足够的能量将所有的扫描信号拉到预设电位，特别是预设的高电位，从而导致现有显示装置的Discharge功能的放电效果不理想，可能会引起显示装置开机时的功能异常。
故，有必要提供一种放电信号触发电路及显示装置，以解决现有技术所存在的问题。
 技术问题
本发明的目的在于提供一种可有效的对显示装置的像素单元的扫描信号进行放电复位操作的放电信号触发电路及显示装置；以解决现有的显示装置的放电功能的放电效果不理想，可能会引起显示装置开机时的功能异常的技术问题。
 技术解决方案
本发明实施例提供一种放电信号触发电路，其包括：
驱动电压源；
第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
所述放电信号触发端，用于输出放电信号；以及
第二分压模块，一端与所述放电信号触发端连接，另一端接地；
其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号；
所述第二分压模块为固定电阻；
当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
在本发明所述的放电信号触发电路中，当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
在本发明所述的放电信号触发电路中，当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
在本发明所述的放电信号触发电路中，所述放电信号触发电路对应的显示装置驱动电路包括整流模块，所述整流模块包括：
整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
本发明实施例也提供一种放电信号触发电路，其包括：
驱动电压源；
第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
所述放电信号触发端，用于输出放电信号；
第二分压模块，一端与所述放电信号触发端连接，另一端接地；
其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号。
在本发明所述的放电信号触发电路中，当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
在本发明所述的放电信号触发电路中，当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
在本发明所述的放电信号触发电路中，所述放电信号触发电路对应的显示装置驱动电路包括整流模块，所述整流模块包括：
整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
在本发明所述的放电信号触发电路中，所述第二分压模块为固定电阻。
在本发明所述的放电信号触发电路中，当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
本发明实施例还提供一种显示装置，其包括用于对显示装置中的像素单元对应的扫描信号进行放电复位操作的放电信号触发电路；所述放电信号触发电路包括：
驱动电压源；
第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
所述放电信号触发端，用于输出放电信号；以及
第二分压模块，一端与所述放电信号触发端连接，另一端接地；
其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号。
在本发明所述的显示装置中，当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
在本发明所述的显示装置中，当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
在本发明所述的显示装置中，所述显示装置的驱动电路包括整流模块，所述整流模块包括：
整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
在本发明所述的显示装置中，所述第二分压模块为固定电阻。
在本发明所述的显示装置中，当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
 有益效果
本发明的放电信号触发电路及显示装置通过背光关闭信号或显示装置关闭信号，对第一分压模块的阻值进行调整，实现了对像素单元的扫描信号的稳定的放电复位操作；解决了现有的显示装置的放电功能的放电效果不理想，可能会引起显示装置开机时的功能异常的技术问题。
 附图说明
为了更清楚地说明本发明实施例中的技术方案，下面将对实施例描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。其中：
图1为本发明的放电信号触发电路的结构示意图；
图2a为本发明的放电信号触发电路的第一优选实施例的结构示意图；
图2b为本发明的放电信号触发电路的第一优选实施例对应的显示装置驱动电路的整流模块的结构示意图；
图3为本发明的放电信号触发电路的第二优选实施例的结构示意图。
 本发明的最佳实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性的劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
请参照图1，图1为本发明的放电信号触发电路的结构示意图。该放电信号触发电路10包括驱动电压源11、第一分压模块12、放电信号触发端13以及第二分压模块14。
驱动电压源11用于产生显示装置的驱动电压；第一分压模块12一端与驱动电压源11连接，另一端分别与放电信号触发端13以及第二分压模块14连接；放电信号触发端13用于输出放电信号；第二分压模块14一端与放电信号触发端13连接，另一端接地。其中通过背光关闭信号或显示装置关闭信号，对第一分压模块12的阻值进行调整，以便放电信号触发端13输出放电信号。其中第二分压模块14优选为固定电阻141。
这里的背光关闭信号是指用于关闭背光的电信号，其一般会略早于驱动电压关闭信号触发，因此采用背光关闭信号触发放电信号，使得显示装置驱动电路具有充足的时间对扫描信号进行放电复位操作，提高了扫描信号进行放电复位操作的稳定性。
这里的显示装置关闭信号是指显示装置的物理开关引发的电信号，其一般也会略早于驱动电压关闭信号，因此采用显示装置关闭信号触发放电信号，也会使得显示装置驱动电路具有充足的时间对扫描信号进行放电复位操作，提高了扫描信号进行放电复位操作的稳定性。
下面通过两个优选实施例说明本发明的放电信号触发电路的具体工作原理。
请参照图2a和图2b，图2a为本发明的放电信号触发电路的第一优选实施例的结构示意图；图2b为本发明的放电信号触发电路的第一优选实施例对应的显示装置驱动电路的整流模块的结构示意图。
当通过显示装置关闭信号，对第一分压模块的阻值进行调整时，第一分压模块包括用于接收显示装置关闭信号的光敏电阻221；光敏电阻221的一端与驱动电压源VDD1连接，光敏电阻221的另一端与放电信号触发端DIS1连接。
放电信号触发电路20对应的显示装置驱动电路包括整流模块25。该整流模块25包括整流桥251、发光二极管252、隔离二极管253以及存储电容254。
整流桥251的输入端输入交流电压，整流桥251的第一输出端和第二输出端输出直流电压；发光二极管252的正极与整流桥251的第一输出端，发光二极管252的负极接地，用于产生显示装置关闭信号；隔离二极管253的正极与整流桥251的第一输出端连接，隔离二极管253的负极与存储电容254的一端连接，存储电容254的另一端与整流桥251的第二输出端连接。
本优选实施例的放电信号触发电路20使用时，当显示装置驱动电路正常工作时，发光二极管252发光，放电信号触发电路20的第一分压模块的光敏电阻221受到光照射，电阻值较小或接近于零。第一分压模块的阻值小于等于设定值，因此放电信号触发端DIS1输出较高电压，不触发放电信号。
当显示装置驱动电路20关闭时，整流模块25的整流桥251输入端停止输入交流电压，整流桥251的输出停止输出直流电压。这时发光二极管252立即停止发光，而存储电容254中的电荷依旧可以保持驱动电压VCC暂时不关闭。这时放电信号触发电路20的第一分压模块的光敏电阻221由于没有受到光照射，电阻值增大，使得第一分压模块的阻值大于设定值，放电信号触发端DIS1输出较小的电压信号，触发放电信号。由于放电信号触发时，驱动电压VCC还没有下降，因此可保证对像素单元的扫描信号的放电复位操作的稳定性。
这样即完成了本优选本实施例的放电信号触发电路20的放电信号触发过程。
本优选实施例的放电信号触发电路通过显示装置关闭信号，对第一分压模块的阻值进行调整，实现了对像素单元的扫描信号的稳定的放电复位操作。
请参照图3，图3为本发明的放电信号触发电路的第二优选实施例的结构示意图。
当通过背光关闭信号，对第一分压模块的阻值进行调整时，第一分压模块包括第一电阻321以及第一开关管322；第一电阻321的一端与驱动电压源VDD2连接，第一电阻321的另一端与第一开关管322的输入端连接，第一开关管322的输出端与放电信号触发端DIS2连接，第一开关管322的控制端输入背光关闭信号BLON。
本优选实施例的放电信号触发电路30使用时，当显示装置的背光模块正常工作时，背光关闭信号BLON输入高电平信号，第一开关管322导通，放电信号触发电路30的第一分压模块的电阻值较小。第一分压模块的阻值小于等于设定值，因此放电信号触发端DIS2输出较高电压，不触发放电信号。
当显示装置的背光模块关闭时，背光关闭信号BLON输入低电平信号，第一开关管322断开，放电信号触发电路30的第一分压模块的电阻值较大。第一分压模块的阻值大于设定值，放电信号触发端DIS2输出较小的电压信号，触发放电信号。由于背光关闭信号触发时，驱动电压VCC还没有下降，因此可保证对像素单元的扫描信号的放电复位操作的稳定性。
这样即完成了本优选本实施例的放电信号触发电路30的放电信号触发过程。
本发明的放电信号触发电路通过背光关闭信号，对第一分压模块的阻值进行调整，实现了对像素单元的扫描信号的稳定的放电复位操作。
本发明还提供一种显示装置，其包括用于对显示装置中的像素单元对应的扫描信号进行放电复位操作的放电信号触发电路。
该放电信号触发电路包括驱动电压源、第一分压模块、放电信号触发端以及第二分压模块。
驱动电压源用于产生显示装置的驱动电压；第一分压模块一端与驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；放电信号触发端用于输出放电信号；第二分压模块一端与放电信号触发端连接，另一端接地。其中通过背光关闭信号或显示装置关闭信号，对第一分压模块的阻值进行调整，以便放电信号触发端输出放电信号。
优选的，当通过背光关闭信号，对第一分压模块的阻值进行调整时，第一分压模块包括第一电阻以及第一开关管；第一电阻的一端与驱动电压源连接，第一电阻的另一端与第一开关管的输入端连接，第一开关管的输出端与放电信号触发端连接，第一开关管的控制端输入背光关闭信号。
优选的，当通过显示装置关闭信号，对第一分压模块的阻值进行调整时，第一分压模块包括用于接收显示装置关闭信号的光敏电阻；光敏电阻的一端与驱动电压源连接，光敏电阻的另一端与放电信号触发端连接。
优选的，放电信号触发电路对应的显示装置驱动电路包括整流模块。该整流模块包括整流桥、发光二极管、隔离二极管以及存储电容。整流桥的输入端输入交流电压，整流桥的第一输出端和第二输出端输出直流电压；发光二极管的正极与整流桥的第一输出端，发光二极管的负极接地，用于产生显示装置关闭信号；隔离二极管的正极与整流桥的第一输出端连接，隔离二极管的负极与存储电容的一端连接，存储电容的另一端与整流桥的第二输出端连接。
本发明的放电信号触发电路及显示装置通过背光关闭信号或显示装置关闭信号，对第一分压模块的阻值进行调整，实现了对像素单元的扫描信号的稳定的放电复位操作；解决了现有的显示装置的放电功能的放电效果不理想，可能会引起显示装置开机时的功能异常的技术问题。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (16)

  1. 一种放电信号触发电路，其包括：
    驱动电压源；
    第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
    所述放电信号触发端，用于输出放电信号；以及
    第二分压模块，一端与所述放电信号触发端连接，另一端接地；
    其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号；
    所述第二分压模块为固定电阻；
    当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
  2. 根据权利要求1所述的放电信号触发电路，其中当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
    所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
  3. 根据权利要求1所述的放电信号触发电路，其中当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
    所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
  4. 根据权利要求3所述的放电信号触发电路，其中所述放电信号触发电路对应的显示装置驱动电路包括整流模块，所述整流模块包括：
    整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
    发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
    隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
    存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
  5. 一种放电信号触发电路，其包括：
    驱动电压源；
    第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
    所述放电信号触发端，用于输出放电信号；以及
    第二分压模块，一端与所述放电信号触发端连接，另一端接地；
    其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号。
  6. 根据权利要求5所述的放电信号触发电路，其中当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
    所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
  7. 根据权利要求5所述的放电信号触发电路，其中当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
    所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
  8. 根据权利要求7所述的放电信号触发电路，其中所述放电信号触发电路对应的显示装置驱动电路包括整流模块，所述整流模块包括：
    整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
    发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
    隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
    存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
  9. 根据权利要求5所述的放电信号触发电路，其中所述第二分压模块为固定电阻。
  10. 根据权利要求5所述的放电信号触发电路，其中当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
  11. 一种显示装置，其包括用于对显示装置中的像素单元对应的扫描信号进行放电复位操作的放电信号触发电路；所述放电信号触发电路包括：
    驱动电压源；
    第一分压模块，一端与所述驱动电压源连接，另一端分别与放电信号触发端以及第二分压模块连接；
    所述放电信号触发端，用于输出放电信号；以及
    第二分压模块，一端与所述放电信号触发端连接，另一端接地；
    其中通过背光关闭信号或显示装置关闭信号，对所述第一分压模块的阻值进行调整，以便所述放电信号触发端输出所述放电信号。
  12. 根据权利要求11所述的显示装置，其中当通过所述背光关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括第一电阻以及第一开关管；
    所述第一电阻的一端与所述驱动电压源连接，所述第一电阻的另一端与所述第一开关管的输入端连接，所述第一开关管的输出端与所述放电信号触发端连接，所述第一开关管的控制端输入背光关闭信号。
  13. 根据权利要求11所述的显示装置，其中当通过所述显示装置关闭信号，对所述第一分压模块的阻值进行调整时，所述第一分压模块包括用于接收所述显示装置关闭信号的光敏电阻；
    所述光敏电阻的一端与所述驱动电压源连接，所述光敏电阻的另一端与所述放电信号触发端连接。
  14. 根据权利要求13所述的显示装置，其中所述显示装置的驱动电路包括整流模块，所述整流模块包括：
    整流桥，所述整流桥的输入端输入交流电压；所述整流桥的第一输出端和第二输出端输出直流电压；
    发光二极管，所述发光二极管的正极与所述整流桥的第一输出端连接，所述发光二极管的负极接地，用于产生所述显示装置关闭信号；
    隔离二极管，所述隔离二极管的正极与所述整流桥的第一输出端连接，所述隔离二极管的负极与存储电容的一端连接；以及
    存储电容，所述存储电容的另一端与所述整流桥的第二输出端连接。
  15. 根据权利要求11所述的显示装置，其中所述第二分压模块为固定电阻。
  16. 根据权利要求11所述的显示装置，其中当所述第一分压模块的阻值大于设定值时，所述放电信号触发端输出所述放电信号。
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