WO2024087680A1 - 显示驱动电路、显示驱动方法和显示装置 - Google Patents

显示驱动电路、显示驱动方法和显示装置 Download PDF

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Publication number
WO2024087680A1
WO2024087680A1 PCT/CN2023/102081 CN2023102081W WO2024087680A1 WO 2024087680 A1 WO2024087680 A1 WO 2024087680A1 CN 2023102081 W CN2023102081 W CN 2023102081W WO 2024087680 A1 WO2024087680 A1 WO 2024087680A1
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Prior art keywords
light
reset
emitting
switch
control switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/102081
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English (en)
French (fr)
Inventor
刘祥恒
师俊
杨婷婷
李春燕
林芸
王志浩
袁海江
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HKC Co Ltd
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HKC Co Ltd
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Publication of WO2024087680A1 publication Critical patent/WO2024087680A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • G09G3/22—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
    • 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]
    • G09G3/3216—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] using a passive matrix
    • 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
    • G09G2310/0264—Details of driving circuits
    • 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
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0247—Flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes

Definitions

  • the present application relates to the field of display driving technology, and in particular to a display driving circuit, a display driving method and a display device.
  • the LED is lit by energizing the TFT (Thin Film Transistor).
  • the TFT switch has leakage, and the power leaked from the TFT switch easily flows to the LED.
  • the LED is affected by the outside world, causing the LED brightness to fluctuate and flicker.
  • the flickering brightness of the LED will affect the normal display of the display panel, resulting in a poor display effect of the display panel.
  • the present application provides a display driving circuit, a display driving method and a display device, which can reduce the flicker of a display panel and ensure normal display of the display panel.
  • the present application provides a display driving circuit, the display driving circuit includes a light-emitting group, the light-emitting group includes a light-emitting unit, and the light-emitting group further includes:
  • a first control switch wherein a first end of the first control switch is connected to the cathode of the light emitting unit, a second end is used to connect to a common end, and a control end is connected to a first signal line, and the first signal line is used to provide a first control signal;
  • a second control switch wherein a first end of the second control switch is used to connect to the charging end, a second end is connected to the anode of the light emitting unit, and a control end is connected to a second signal line, and the second signal line is used to provide a second control signal;
  • the first control switch When the light-emitting unit is turned off, the first control switch responds to the first control signal to disconnect the cathode of the light-emitting unit from the common end, and the second control switch responds to the second control signal to disconnect the anode of the light-emitting unit from the charging end.
  • the present application further provides a display driving method, the display driving method is applied to the display driving circuit as described above, the display driving method comprises:
  • the first control switch Sending a first control signal to the first control switch, the first control switch responds to the first control signal, the first end and the second end of the first control switch are disconnected, so that the cathode of the light-emitting unit and the common end are disconnected;
  • a second control signal is sent to the second control switch, and the second control switch responds to the second control signal, and the first end and the second end of the second control switch are disconnected, so that the anode of the light-emitting unit and the charging end are disconnected.
  • the present application also provides a display device, which includes a display panel, the display panel having a display area and a non-display area, the non-display area is arranged around the display area, the display device also includes the display driving circuit as described above, the first control switch and the second control switch are arranged in the non-display area, and the light-emitting unit is located in the display area.
  • the first control switch responds to the first control signal
  • the second control switch responds to the second control signal.
  • the first control switch controls the disconnection of the cathode of the light-emitting unit and the common terminal, thereby reducing the influence of the outside world on the cathode of the light-emitting unit.
  • the second control switch disconnects the anode of the light-emitting unit from the charging terminal, thereby reducing the influence of the outside world on the anode of the light-emitting unit.
  • the light-emitting unit After the light-emitting unit is completely lit, the light-emitting unit is turned off, and the anode and cathode of the light-emitting unit are both disconnected from the outside world. As a result, the external current will not enter the light-emitting unit, thereby reducing the influence of the external current on the light-emitting unit. In addition, the brightness of the display panel is reduced to appear flickering, ensuring that the display panel can display normally.
  • FIG. 1 is a circuit connection diagram of a display driving circuit according to a first embodiment of the present application.
  • FIG. 2 is a schematic diagram of a circuit connection of two light-emitting groups in FIG. 1 of the present application.
  • FIG. 3 is a schematic diagram of circuit connections of the four light-emitting groups in FIG. 1 of the present application.
  • FIG. 4 is a timing control diagram of the display driving circuit in FIG. 3 of the present application.
  • FIG. 5 is a schematic diagram of the process steps of extinguishing the light-emitting units in any light-emitting group in the display driving method of the second embodiment of the present application.
  • FIG. 6 is a schematic diagram of the process steps of lighting up and extinguishing each light-emitting group in the display driving method of the second embodiment of the present application.
  • FIG. 7 is a schematic structural diagram of a display device according to a third embodiment of the present application.
  • the indications of directions (such as up, down, left, right, front and back) used to explain the structure and movement of various elements of the present application are not absolute but relative. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the description of the positions of these elements changes, the indications of these directions also change accordingly.
  • Mini-LED Mini Light Emitting Diode
  • Mini-LED has the advantages of higher brightness, lower loss and longer service life.
  • the display driving circuit includes a light-emitting group 10, and the light-emitting group 10 includes a light-emitting unit 110.
  • the light-emitting unit 110 can be a Mini-LED lamp bead.
  • the light-emitting unit 110 is used to emit light, thereby completing the picture display.
  • the light-emitting group 10 further includes a first control switch T2 and a second control switch T3.
  • the first end of the first control switch T2 is connected to the cathode of the light emitting unit 110, the second end is used to connect the common end 30, the control end is connected to the first signal line, the first signal line is used to provide a first control signal, and the first control switch T2 is used to respond to the first control signal to disconnect the cathode of the light emitting unit 110 and the common end 30;
  • the common end 30 can be understood as It is a common ground terminal, and the voltage of the common ground terminal is relatively low, which is lower than the anode voltage of the light-emitting unit 110.
  • the cathode of the light-emitting unit 110 is connected to the common terminal 30 to ensure that the anode voltage of the light-emitting unit 110 is higher than the cathode voltage, and to ensure that the anode potential of the light-emitting unit 110 is higher than the cathode potential, so that the voltage flows from a high potential to a low voltage, and ensure that the light-emitting unit 110 is lit smoothly.
  • the first end of the second control switch T3 is used to connect to the charging end 40, the second end is connected to the anode of the light emitting unit 110, and the control end is connected to the second signal line.
  • the second signal line is used to provide a second control signal.
  • the second control switch T3 is used to respond to the second control signal to disconnect the anode of the light emitting unit 110 and the charging end 40.
  • the first control switch T2 responds to the first control signal to disconnect the cathode of the light-emitting unit 110 from the common terminal 30.
  • the second control switch T3 responds to the second control signal to disconnect the anode of the light-emitting unit 110 from the charging terminal 40, thereby preventing the light-emitting unit 110 from being affected by the voltage of the charging terminal 40.
  • the first control switch T2 responds to the first control signal, and the first control switch T2 controls the disconnection of the cathode of the light-emitting unit 110 and the common terminal 30, thereby reducing the external influence on the cathode of the light-emitting unit 110.
  • the charging terminal 40 is used to provide power for lighting the light-emitting unit 110, and the second control switch T3 responds to the second control signal. After the charging terminal 40 completes the charging of the light-emitting unit 110, the second control switch T3 disconnects the anode of the light-emitting unit 110 from the charging terminal 40, thereby reducing the external influence on the anode of the light-emitting unit 110.
  • the light-emitting unit 110 After the light-emitting unit 110 is lit and displayed, the light-emitting unit 110 is extinguished, and the anode and cathode of the light-emitting unit 110 are disconnected from the outside world. As a result, the external current will not enter the light-emitting unit 110, thereby reducing the influence of the external current on the light-emitting unit 110. In addition, the brightness of the display panel is reduced to flicker, ensuring that the display panel can display normally.
  • the light-emitting group 10 also includes: a reset switch T1, one end of the reset switch T1 is used to connect to the voltage reset end 20, the other end is connected to the anode of the light-emitting unit 110, the control end is connected to the reset signal line, and the voltage reset end 20 is used to provide a reset voltage.
  • a reset switch T1 one end of the reset switch T1 is used to connect to the voltage reset end 20, the other end is connected to the anode of the light-emitting unit 110, the control end is connected to the reset signal line, and the voltage reset end 20 is used to provide a reset voltage.
  • the reset switch T1 is used to respond to the reset signal to connect the anode of the light-emitting unit 110 and the voltage reset end 20; the voltage reset end 20 is used to provide a reset voltage, and before each lighting of the light-emitting unit 110, the reset voltage is provided to the light-emitting unit 110, and the reset voltage is provided to the anode of the light-emitting unit 110 to complete the voltage reset of the light-emitting unit 110.
  • the light-emitting unit 110 maintains the same reference voltage before charging, and the reference voltage can be understood as the reset voltage.
  • the light-emitting units 110 are charged at the same reference voltage. If the reference voltages are different, the brightness of the light-emitting units 110 will also be different, which may easily cause the brightness of the light-emitting units 110 to exceed or be lower than the lighting requirement. Therefore, by resetting the voltage, the starting reference voltage in each group of light-emitting units 110 is made the same, which facilitates the control of the brightness of the light-emitting units 110.
  • the voltage reset terminal 20 is used to provide a reset voltage.
  • the reset switch T1 responds to the reset signal.
  • the anode of the light-emitting unit 110 is connected to the voltage reset terminal 20 to reset the voltage of the anode of the light-emitting unit 110.
  • the reset switch T1, the first control switch T2 and the second control switch T3 are connected to the same scan line, and the reset signal, the first control signal and the second control signal are the same scan signal; thus, the reset switch T1, the first control switch T2 and the second control switch T3 can be controlled simultaneously through the same scan line.
  • the layout of the scan lines can be reduced and the circuit structure can be simplified.
  • the reset switch T1 when the reset switch T1 is turned on, the first control switch T2 and the second control switch T3 are turned off. When the reset switch T1 is turned off, the first control switch T2 and the second control switch T3 are turned on. That is to say, the on-off state of the reset switch T1 is opposite to that of the first control switch T2 and the second control switch T3.
  • the reset switch T1 is one of a P-type field effect transistor and an N-type field effect transistor, and the first control switch T2 and the second control switch T3 are the remaining one of the P-type field effect transistor and the N-type field effect transistor. It is ensured that the on-off state of the reset switch T1 is opposite to that of the other two response switches.
  • the reset switch T1 is a P-type field effect transistor, and the first control switch T2 and the second control switch T3 are N-type field effect transistors.
  • the control end of the reset switch T1 receives a low level, and the reset switch T1 is turned on.
  • the control ends of the first control switch T2 and the second control switch T3 receive a low level, and the first control switch T2 and the second control switch T3 are turned off.
  • the control end of the reset switch T1 receives a high level, and the reset switch T1 is turned off.
  • the control ends of the first control switch T2 and the second control switch T3 receive a high level, and the first control switch T2 and the second control switch T3 are turned on.
  • the reset switch T1 is an N-type field effect transistor, and the first control switch T2 and the second control switch T3 are P-type field effect transistors.
  • the control end of the reset switch T1 receives a low level, and the reset switch T1 is disconnected.
  • the control ends of the first control switch T2 and the second control switch T3 receive a low level, and the first control switch T2 and the second control switch T3 are turned on.
  • the control end of the reset switch T1 receives a high level, and the reset switch T1 is turned on.
  • the control ends of the first control switch T2 and the second control switch T3 receive a high level, and the first control switch T2 and the second control switch T3 are disconnected.
  • the second end of the reset switch T1 is connected to the second end of the second control switch T3.
  • the reset voltage provided by the voltage initialization end is provided between the second control switch T3 and the light emitting unit 110.
  • the initialization of the second control switch T3 is also completed. In this way, the influence of the leakage of the second control switch T3 on the light emitting unit 110 is effectively reduced.
  • the light-emitting group 10 is provided with N rows, 2 ⁇ N, N is a positive integer, and the display driving circuit includes a voltage reset terminal 20;
  • the first end of the reset switch T1 is connected to the voltage reset end 20, and the second end is correspondingly connected to the anode of the light-emitting unit 110 in the first row of light-emitting groups.
  • the reset voltage flows from the voltage reset terminal 20 to the anode of the light emitting unit 110 .
  • the first end of the reset switch T1 is connected to the anode of the light-emitting unit 110 in the Nth row of light-emitting groups, and the second end is connected to the voltage reset end 20; starting from the 2nd row, when the voltage is reset, the voltage flows from the anode of the light-emitting unit to the voltage reset end 20.
  • the display driving circuit further includes a one-way switch 50, which is disposed between the Nth row reset switch T1 and the voltage reset terminal 20.
  • the one-way switch 50 is disposed to prevent the voltage from flowing in reverse and reduce the impact on the light-emitting unit.
  • the one-way switch 50 can be understood as a diode switch.
  • the first end of the reset switch T1 is connected to the voltage reset end, and the second end is correspondingly connected to the anode of the light-emitting unit 110 in the first row of light-emitting groups; when the voltage is reset, the voltage at the voltage reset end flows to the anode of the light-emitting unit.
  • the first end of the reset switch T1 is connected to the anode of the light-emitting unit 110 in the Nth row of light-emitting groups, and the second end is connected to the first end of the reset switch in the N+1th row of light-emitting groups; when the voltage is reset, the voltage at the anode of the light-emitting unit flows to the voltage reset end.
  • the first end of the reset switch T1 is also connected to the anode of the light-emitting unit in the N+1th row of light-emitting groups, and the second end is connected to the first end of the reset switch in the N+2th row of light-emitting groups; when the voltage is reset, the voltage at the anode of the light-emitting unit 110 flows to the voltage reset end.
  • the first end of the reset switch T1 is also connected to the anode of the light-emitting unit in the N+2th row of light-emitting groups, and the second end is connected to the voltage reset end; when the voltage is reset, the voltage of the anode of the light-emitting unit 110 flows to the voltage reset end.
  • the one-way switch 50 is provided in the circuit between the reset switch T1 of the Nth row and the reset switch T1 of the N+1th row, and the one-way switch 50 is also provided in the circuit between the reset switch T1 of the N+1th row and the reset switch T1 of the N+2th row.
  • the one-way switch is used to unidirectionally conduct the circuit from the reset switch of the Nth row to the reset switch of the N+1th row, thereby ensuring that the voltage of the anode of the light-emitting unit 110 flows to the voltage reset terminal 20. It is prevented that the voltage of the charging terminal 40 flows in the reverse direction to the light-emitting unit 110 of the previous row through the one-way switch 50. It can also be understood that the voltage reset terminal 20 extends a circuit that simultaneously connects the Nth row to the N+2th row.
  • the display driving circuit further includes a common terminal 30 and a common line, the common line extends from the common terminal 30, and the second end of the first control switch T2 in each light-emitting group 10 is respectively connected to the common line.
  • Multiple groups of light-emitting units 110 share a set of common lines, which reduces the leads of the common terminal 30 and simplifies the circuit design.
  • the light-emitting group 10 includes a plurality of light-emitting units 110, and the plurality of light-emitting units 110 are connected in parallel.
  • the cathodes of the light-emitting units 110 connected in parallel are connected to the same cathode line, and the anodes of the light-emitting units 110 connected in parallel are connected to the same anode line.
  • the first control switch T2 is arranged on the cathode line, and the second control switch T3 is arranged on the anode line.
  • the on-off control of the plurality of light-emitting units 110 connected in parallel can be completed by the first control switch T2 and the second control switch T3.
  • the display driving circuit includes a plurality of charging terminals 40, each light-emitting group 10 is provided with a corresponding charging terminal 40, and the charging terminal 40 is used to provide a charging voltage to the corresponding light-emitting group 10.
  • the charging voltages provided by each group of charging terminals 40 to the corresponding light-emitting group 10 may be the same or different.
  • the charging voltages provided by each group of charging terminals 40 are different in magnitude, and the display driving circuit provides charging voltages of different magnitudes to each group of charging terminals 40 according to display requirements.
  • the present application further provides a display driving method, which is applied to a display driving circuit.
  • the display driving method includes:
  • Step S10 sending a first control signal to the first control switch, the first control switch responds to the first control signal, the first end and the second end of the first control switch are disconnected, so that the cathode and the common end of the light-emitting unit are disconnected;
  • Step S20 sending a second control signal to the second control switch, the second control switch responds to the second control signal, the first end and the second end of the second control switch are disconnected, so that the anode and the charging end of the light emitting unit are disconnected.
  • the first control switch responds to the first control signal
  • the second control switch responds to the second control signal.
  • the first control switch controls the disconnection of the cathode and the common terminal of the light-emitting unit to reduce the external influence on the cathode of the light-emitting unit.
  • the second control switch disconnects the anode of the light-emitting unit from the charging terminal to reduce the external influence on the anode of the light-emitting unit.
  • the light-emitting unit After the light-emitting unit is completely lit, the light-emitting unit is turned off, and the anode and cathode of the light-emitting unit are disconnected from the outside world. As a result, the external current will not enter the light-emitting unit, reducing the influence of the external current on the light-emitting unit. In addition, the flickering of the brightness of the display panel is reduced to ensure that the display panel can display normally.
  • the present application further provides a display driving method, which is applied to a display driving circuit, wherein a row of scan lines is correspondingly arranged for a group of light-emitting groups in the display driving circuit, and the first row of scan lines is correspondingly connected to the control ends of the reset switch T1, the first control switch T2, and the second control switch T3 in the first row of light-emitting groups 10, and the first row of scan lines is used to provide a first scan signal;
  • the Nth row of scan lines is connected to the control ends of the reset switch T1, the first control switch T2 and the second control switch T3 in the Nth row of light-emitting groups 10, and the Nth row of scan lines is used to provide the Nth scan signal;
  • Display driving methods include:
  • Step S100 reset stage, provide scanning signals to the light-emitting groups 10, each scanning signal is low level, the reset switch T1 in each light-emitting group 10 is turned on, the first control switch T2 and the second control switch T3 are turned off, and the anode of the light-emitting unit 110 in each light-emitting group 10 is connected to the voltage reset terminal 20; the reset stage is the S1 stage, and the first scanning signal is CK1. At the same time, the voltage reset of the light-emitting unit 110 in each light-emitting group 10 is completed.
  • the anode voltage of the light-emitting unit 110 is 0. In this way, in the reset stage, for the light-emitting unit 110 in the first row, the voltage flows from the voltage reset terminal 20 to the light-emitting unit 110. Starting from the second row, the charging terminal 40 in the display driving circuit has begun to charge. In order to lower the anode voltage of the light-emitting unit 110, in the reset stage, the anode voltage of the light-emitting unit 110 starting from the second row flows to the voltage reset terminal 20.
  • the first end of the response switch is the source, the second end is the drain, and the control end is the gate.
  • the source is used as the input end of the voltage signal, and the drain is used as the output end of the voltage signal. Therefore, for the light-emitting group 10 in the first row, the source of the reset switch T1 is connected to the voltage reset end 20, and the drain is connected to the anode of the light-emitting unit 110. The voltage flows from the voltage reset end 20 to the anode of the light-emitting unit 110.
  • the source of the reset switch T1 is connected to the anode of the light-emitting unit 110, and the drain is connected to the voltage reset end 20, and the voltage flows from the anode of the light-emitting unit 110 to the voltage reset end 20.
  • Step S200 the first row charging stage, the first scanning signal is high level, the other scanning signals are low level, the reset switch T1 in the first row of light-emitting groups 10 is turned off, the first control switch T2 and the second control switch T3 are turned on, the charging terminal 40 charges the first row of light-emitting groups 10, and the other light-emitting groups 10 are in the reset stage; wherein, the reset switch T1 is a P-type field effect transistor, and the first control switch and the second control switch T3 are N-type field effect transistors.
  • the first row charging stage corresponds to the S2 stage. It can be seen that the level of CK1 in the S2 stage is high level, and CK2, CK3 and CK4 are low level. At this time, the light-emitting groups in the first row are lit.
  • Step S300 in the Nth row charging stage, the Nth row scanning signal is at a high level, and the other scanning signals are at a low level, the reset switch T1 in the Nth row light-emitting group 10 is disconnected, the first control switch and the second control switch T3 are turned on, and the charging terminal 40 charges the corresponding Nth row light-emitting group 10, wherein the first control switch T2 in the N-1th row is disconnected; the N-1th row can be understood as the 1st row, and when the 2nd row is lit, the external connection of the 1st row is disconnected to prevent the 1st row light-emitting group 10 from being affected by the outside world.
  • the charging stage of the Nth row is in the S3 stage, and the scanning signal of the Nth row is CK2. It can be seen that the level of CK2 in the S3 stage is high, and CK1, CK3 and CK4 are low. At this time, the light-emitting group of the Nth row is lit, which can also be understood as the lighting of the light-emitting group of the 2nd row.
  • Step S400 N+1th row charging stage, the N+1th row scanning signal is high level, and the remaining scanning signals are Low level, the reset switch T1 in the N+1th row of light-emitting groups 10 is disconnected, the first control switch and the second control switch T3 are turned on, and the charging terminal 40 charges the light-emitting groups 10 corresponding to the N+1th row, wherein the first control switch T2 in the Nth row is disconnected, and the N+1th row can be understood as the 3rd row.
  • the 3rd row is lit, the external connection of the light-emitting groups in the 2nd row is disconnected to prevent the light-emitting groups 10 in the 2nd row from being affected by the outside world.
  • the charging stage of the N+1th row is in the S4 stage, and the scanning signal of the N+1th row is CK3. It can be seen that the level of CK3 in the S4 stage is high, and CK1, CK2 and CK4 are low. At this time, the light-emitting group of the N+1th row is lit, which can also be understood as the lighting of the light-emitting group of the 3rd row.
  • the N+2 row scanning signal can be understood as CK4.
  • the N+2 row scanning signal is at a high level, and the other scanning signals are at a low level.
  • the reset switch T1 in the N+2 row light-emitting group 10 is turned off, the first control switch and the second control switch T3 are turned on, and the charging terminal 40 charges the corresponding N+2 row light-emitting group 10, wherein the first control switch T2 in the N+1 row is turned off.
  • the S5 stage the N+2 row light-emitting group 10 is charged. It can be seen that in the S5 stage, the level of CK4 is at a high level, and CK1, CK2 and CK3 are at a low level. At this time, the N+2 row light-emitting group is lit, which can also be understood as the lighting of the 4th row light-emitting group.
  • the stages S2 to S5 can be understood as a scanning cycle, and the first row of light groups 10 are recharged and lit in the S6 stage. It can be seen that 4 rows of light groups complete a scanning cycle, so the number of light groups set in the display panel is at least 4 rows of light groups, or an integer multiple of 4.
  • the charging stage is to scan and charge row by row from the first row to the N+2th row, and after the previous row is scanned and charged, the previous row is lit.
  • the anode and cathode of the light-emitting unit 110 in the light-emitting group 10 of the previous row are disconnected from the outside world, so that the lighting of the subsequent light-emitting group 10 will not affect the light-emitting unit 110 of the previous row, thereby reducing the accidental flickering of the light-emitting unit 110 of the previous row.
  • the present application further provides a display device, which includes a display panel 60, the display panel 60 having a display area 610 and a non-display area 620, the non-display area 620 being arranged around the display area 610, the display device further includes a display driving circuit, the display driving circuit includes a light-emitting group 10, the light-emitting group 10 includes: a reset switch T1, a first control switch T2, and a second control switch T3.
  • the reset switch T1, the first control switch T2, and the second control switch T3 are arranged in the non-display area 620, and the light-emitting unit 110 is located in the display area 610.
  • the non-display area 620 is located in the frame of the display panel 60, and the reset switch T1, the first control switch T2, and the second control switch T3 make full use of the frame position of the display panel 60 to reduce the impact on the display image.
  • the light-emitting group 10 includes: a reset switch T1, a first control switch T2, and a second control switch T3 are used to control the input circuit of the light-emitting unit 110 and the output circuit of the light-emitting unit 110, thereby completing the output of the light-emitting unit 110.
  • the input end and the output end are controlled to be on and off. Then the light emitting unit 110 is disconnected from the outside world.
  • the input end of the light emitting unit 110 is the cathode of the light emitting unit 110, and the output end of the light emitting unit 110 is the anode of the light emitting unit 110.
  • One end of the reset switch T1 is used to connect to the voltage reset end 20, and the other end is connected to the anode of the light-emitting unit 110.
  • the reset switch T1 is used to respond to the reset signal to connect the anode of the light-emitting unit 110 to the voltage reset end 20.
  • the voltage reset end 20 is used to provide a reset voltage.
  • the reset voltage is provided to the light-emitting unit 110.
  • the reset voltage is provided to the anode of the light-emitting unit 110 to complete the voltage reset of the light-emitting unit 110.
  • the light-emitting unit 110 maintains the same reference voltage before charging, and the reference voltage can be understood as the reset voltage.
  • the light-emitting units 110 are charged at the same reference voltage. If the reference voltages are different, the brightness of the light-emitting units 110 will also be different, which may easily cause the brightness of the light-emitting units 110 to exceed or be lower than the lighting requirement. Therefore, by resetting the voltage, the starting reference voltage in each group of light-emitting units 110 is made the same, which facilitates the control of the brightness of the light-emitting units 110.
  • the first control switch T2 is connected to the cathode of the light emitting unit 110, and the other end is used to connect the common terminal 30.
  • the first control switch T2 is used to respond to the first control signal to disconnect the cathode of the light emitting unit 110 from the common terminal 30;
  • the common terminal 30 can be understood as a common ground terminal, and the voltage of the common ground terminal is relatively low, which is lower than the anode voltage of the light emitting unit 110.
  • the cathode of the light emitting unit 110 is connected to the common terminal 30 to ensure that the anode voltage of the light emitting unit 110 is higher than the cathode voltage, and to ensure that the anode potential of the light emitting unit 110 is higher than the cathode potential, so that the voltage flows from a high potential to a low voltage, and ensure that the light emitting unit 110 is lit smoothly.
  • One end of the second control switch T3 is used to connect the charging terminal 40, and the other end is connected to the anode of the light emitting unit 110.
  • the second control switch T3 is used to respond to the second control signal to disconnect the anode of the light emitting unit 110 from the charging terminal 40.
  • the second control switch T3 responds to the second control signal to disconnect the anode of the light emitting unit 110 from the charging terminal 40, so as to prevent the light emitting unit 110 from being affected by the voltage of the charging terminal 40.

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Abstract

一种显示驱动电路、显示驱动方法和显示装置。其中，显示驱动电路包括发光组（10），发光组（10）包括发光单元（110）、第一控制开关（T2）和第二控制开关（T3）；第一控制开关（T2）的第一端连接发光单元（110）的阴极，第二端用于连接公共端（30），控制端连接第一信号线，第一信号线用于提供第一控制信号；第二控制开关（T3）的第一端用于连接充电端（40），第二端连接发光单元（110）的阳极，控制端连接第二信号线，第二信号线用于提供第二控制信号。发光单元（110）熄灭时，第一控制开关（T2）响应第一控制信号，使发光单元（110）的阴极和公共端（30）断开，第二控制开关（T3）响应第二控制信号，使发光单元（110）的阳极和充电端断开，从而能够减少显示装置的显示面板（60）的部分位置闪烁，保证显示面板（60）正常显示。

Description

显示驱动电路、显示驱动方法和显示装置
本申请要求于2022年10月28日提交中国专利局，申请号为CN 202211330825.0，申请名称为“显示驱动电路、显示驱动方法和显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示驱动技术领域，特别涉及一种显示驱动电路、显示驱动方法和显示装置。
背景技术
在显示面板中，通过给TFT(Thin Film Transistor，薄膜晶体管开关)通电来点亮LED。但是，TFT开关存在漏电的情况，TFT开关漏出的电力容易流向LED。导致LED受到外界影响，使LED的亮度出现波动闪烁。而LED的亮度闪烁会影响显示面板的正常显示，导致显示面板的显示效果变差。
发明内容
本申请提供一种显示驱动电路、显示驱动方法和显示装置，能够减少显示面板的闪烁，保证显示面板正常显示。
根据本申请的一个方面，本申请提供一种显示驱动电路，所述显示驱动电路包括发光组，所述发光组包括发光单元，所述发光组还包括：
第一控制开关，所述第一控制开关的第一端连接所述发光单元的阴极，第二端用于连接公共端，控制端连接第一信号线，所述第一信号线用于提供第一控制信号；以及
第二控制开关，所述第二控制开关的第一端用于连接充电端，第二端连接所述发光单元的阳极，控制端连接第二信号线，所述第二信号线用于提供第二控制信号；
其中，所述发光单元熄灭时，所述第一控制开关响应所述第一控制信号，使所述发光单元的阴极和所述公共端断开，所述第二控制开关响应所述第二控制信号，使所述发光单元的阳极和所述充电端断开。
根据本申请的另一方面，本申请还提供一种显示驱动方法，所述显示驱动方法应用于如上文所述的显示驱动电路，所述显示驱动方法包括：
向所述第一控制开关发送第一控制信号，所述第一控制开关响应所述第一控制信号，所述第一控制开关的第一端和第二端断开，使所述发光单元的阴极和所述公共端断开；
向所述第二控制开关发送第二控制信号，所述第二控制开关响应所述第二控制信号，所述第二控制开关的第一端和第二端断开，使所述发光单元的阳极和所述充电端断开。
根据本申请的又一个方面，本申请还提供一种显示装置，所述显示装置包括显示面板，所述显示面板具有显示区和非显示区，所述非显示区设于所述显示区的周边，所述显示装置还包括如上文所述显示驱动电路，所述第一控制开关和所述第二控制开关设于所述非显示区，所述发光单元位于所述显示区。
本申请的技术方案中，第一控制开关响应第一控制信号，第二控制开关响应第二控制信号。在发光单元熄灭后，第一控制开关控制发光单元的阴极和公共端的断开，减少外界对发光单元的阴极影响。第二控制开关在充电端完成对发光单元的充电后，使发光单元的阳极和充电端断开，减少外界对发光单元的阳极影响。发光单元在完成点亮后，发光单元熄灭，发光单元的阳极和阴极均断开了和外界的连接。由此，外界的电流不会进入到发光单元中，减少了外界电流对发光单元的影响。进而减少显示面板的亮度出现闪烁，保证显示面板能够正常显示。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
为了使本公开的内容更容易被清楚的理解，下面根据本公开的具体实施例并结合附图，对本公开作进一步详细的说明，其中：
图1是本申请中第一实施例的显示驱动电路的电路连接示意图。
图2是本申请图1中两组发光组连接的电路连接示意图。
图3是本申请图1中四组发光组连接的电路连接示意图。
图4是本申请图3中显示驱动电路的时序控制图。
图5是本申请中第二实施例的显示驱动方法中任意一组发光组中发光单元熄灭的流程步骤示意图。
图6是本申请中第二实施例的显示驱动方法中每组发光组点亮和熄灭的流程步骤示意图。
图7是本申请中第三实施例的显示装置的结构示意图。
本发明的实施方式
尽管本申请可以容易地表现为不同形式的实施方式，但在附图中示出并且在本说明书中将详细说明的仅仅是其中一些具体实施方式，同时可以理解的是本说明书应视为是本申请原理的示范性说明，而并非旨在将本申请限制到在此所说明的那样。
由此，本说明书中所指出的一个特征将用于说明本申请的一个实施方式的其中一个特征，而不是暗示本申请的每个实施方式必须具有所说明的特征。此外，应当注意的是本说明书描述了许多特征。尽管某些特征可以组合在一起以示出可能的系统设计，但是这些特征也可用于其他的未明确说明的组合。由此，除非另有说明，所说明的组合并非旨在限制。
在附图所示的实施方式中，方向的指示(诸如上、下、左、右、前和后)用于解释本申请的各种元件的结构和运动不是绝对的而是相对的。当这些元件处于附图所示的位置时，这些说明是合适的。如果这些元件的位置的说明发生改变时，则这些方向的指示也相应地改变。
现在将参考附图更全面地描述示例实施方式。然而，示例实施方式能够以多种形式实施，且不应被理解为限于在此阐述的范例；相反，提供这些示例实施方式使得本申请的描述将更加全面和完整，并将示例实施方式的构思全面地传达给本领域的技术人员。附图仅为本申请的示意性图解，并非一定是按比例绘制。图中相同的附图标记表示相同或类似的部分，因而将省略对它们的重复描述。
以下结合本说明书的附图，对本申请的较佳实施方式予以进一步地详尽阐述。
实施例一
参阅图1至图3所示，本申请提供一种显示驱动电路，本申请的显示驱动电路可以用在Mini-LED(Mini Light Emitting Diode，微型发光二极管)中。Mini-LED具有更高的亮度，更低的损耗以及更长的使用寿命等优点。
显示驱动电路包括发光组10，发光组10包括发光单元110，发光单元110可以是Mini-LED的灯珠，发光单元110用于发光，进而完成画面显示。
发光组10还包括：第一控制开关T2和第二控制开关T3。
第一控制开关T2的第一端连接发光单元110的阴极，第二端用于连接公共端30，控制端连接第一信号线，第一信号线用于提供第一控制信号，第一控制开关T2用于响应第一控制信号，以使发光单元110的阴极和公共端30断开；公共端30可以理解 为公共接地端，公共接地端的电压较低，低于发光单元110的阳极电压。发光单元110的阴极连接公共端30保证发光单元110的阳极电压高于阴极电压，确保发光单元110的阳极电位高于阴极电位，使电压由高电位流向低电压，保证发光单元110顺利点亮。
第二控制开关T3的第一端用于连接充电端40，第二端连接发光单元110的阳极，控制端连接第二信号线，第二信号线用于提供第二控制信号，第二控制开关T3用于响应第二控制信号，以使发光单元110的阳极和充电端40断开。
在发光单元110熄灭时，充电端40完成对发光单元110的充电点亮后，第一控制开关T2响应第一控制信号，使发光单元110的阴极和公共端30断开。通过第二控制开关T3响应第二控制信号，使发光单元110的阳极和充电端40断开，避免发光单元110在受到充电端40的电压影响。
本实施例的技术方案中，第一控制开关T2响应第一控制信号，第一控制开关T2控制发光单元110的阴极和公共端30的断开，减少外界对发光单元110的阴极影响。充电端40用于为发光单元110的点亮提供电力，第二控制开关T3响应第二控制信号，第二控制开关T3在充电端40完成对发光单元110的充电后，使发光单元110的阳极和充电端40断开，减少外界对发光单元110的阳极影响。发光单元110在完成点亮显示后，发光单元110熄灭，发光单元110的阳极和阴极均断开了和外界的连接。由此，外界的电流不会进入到发光单元110中，减少了外界电流对发光单元110的影响。进而减少显示面板的亮度出现闪烁，保证显示面板能够正常显示。
发光组10还包括：复位开关T1，复位开关T1的一端用于连接电压复位端20，另一端连接发光单元110的阳极，控制端连接复位信号线，电压复位端20用于提供复位电压。复位开关T1用于响应复位信号，以使发光单元110的阳极和电压复位端20连通；电压复位端20用于提供复位电压，在每次点亮发光单元110前，向发光单元110提供复位电压，复位电压提供至发光单元110的阳极，完成发光单元110的电压复位。使发光单元110在充电前保持相同的基准电压，该基准电压就可以理解为复位电压。
也就是说，发光单元110在相同的基准电压下进行充电，如果基准电压不同，发光单元110的亮度也会出现不同，容易导致发光单元110的亮度超出了点亮要求或低于点亮要求。因此，通过电压复位，让每组发光单元110中的起始基准电压相同。便于对发光单元110的亮度进行控制。
电压复位端20用于提供复位电压，复位开关T1响应复位信号，复位开关T1控 制发光单元110的阳极和电压复位端20连通，对发光单元110的阳极进行电压复位。
为了进一步的简化电路结构，复位开关T1、第一控制开关T2和第二控制开关T3连接同一扫描线，复位信号、第一控制信号和第二控制信号为同一扫描信号；这样，可以通过同一根扫描线，同时完成对复位开关T1、第一控制开关T2和第二控制开关T3的控制。由此，可以减少扫描线的布局排布，简化电路结构。
当然，在复位开关T1导通时，第一控制开关T2和第二控制开关T3断开。在复位开关T1断开时，第一控制开关T2和第二控制开关T3导通。也就是说，复位开关T1与第一控制开关T2和第二控制开关T3的通断状态相反。复位开关T1为P型场效应管和N型场效应管其中一种，第一控制开关T2和第二控制开关T3为P型场效应管和N型场效应管其中剩余的一种。保证复位开关T1与其它两个响应开关的通断状态相反。
比如，复位开关T1为P型场效应管，第一控制开关T2和第二控制开关T3为N型场效应管。复位开关T1的控制端接收到低电平，复位开关T1导通。第一控制开关T2和第二控制开关T3的控制端接收到低电平，第一控制开关T2和第二控制开关T3断开。复位开关T1的控制端接收到高电平，复位开关T1断开。第一控制开关T2和第二控制开关T3的控制端接收到高电平，第一控制开关T2和第二控制开关T3导通。
或者是，复位开关T1为N型场效应管，第一控制开关T2和第二控制开关T3为P型场效应管。复位开关T1的控制端接收到低电平，复位开关T1断开。第一控制开关T2和第二控制开关T3的控制端接收到低电平，第一控制开关T2和第二控制开关T3导通。复位开关T1的控制端接收到高电平，复位开关T1导通。第一控制开关T2和第二控制开关T3的控制端接收到高电平，第一控制开关T2和第二控制开关T3断开。
为了准确的完成发光单元110的电压初始化，复位开关T1的第二端连接第二控制开关T3的第二端。由此，电压初始端提供的复位电压被提供至第二控制开关T3和发光单元110之间。在完成发光单元110的电压初始化的同时，也完成了第二控制开关T3的初始化。如此，有效减少第二控制开关T3漏电对发光单元110的影响。
在其中一个方面，发光组10设置有N行，2≤N，N为正整数，显示驱动电路包括电压复位端20；
第1行发光组10中，复位开关T1的第一端连接电压复位端20，第二端对应连接第1行发光组中发光单元110的阳极。第1行发光组中的发光单元110的阳极来说， 复位电压是由电压复位端20流向发光单元110的阳极。
第N行发光组中，复位开关T1第一端连接第N行发光组中发光单元110的阳极，第二端连接电压复位端20；从第2行开始，在进行电压复位时，电压是由发光单元的阳极流向电压复位端20。
显示驱动电路还包括单向开关50，单向开关50设于第N行复位开关T1和电压复位端20之间。通过单向开关50的设置避免电压反向流动，减少对发光单元的影响。单向开关50可以理解为二极管开关。
为了更清晰的描述本实施例，对上述方案进行进一步说明：
第1行发光组中，复位开关T1的第一端连接电压复位端，第二端对应连接第1行发光组中发光单元110的阳极；电压复位时，电压复位端的电压流向发光单元的阳极。
第N行发光组中，复位开关T1的第一端连接第N行发光组中发光单元110的阳极，第二端连接第N+1行发光组中复位开关的第一端；电压复位时，发光单元的阳极的电压流向电压复位端。
第N+1行发光组中，复位开关T1的第一端还连接第N+1行发光组中发光单元的阳极，第二端连接第N+2行发光组中复位开关的第一端；电压复位时，发光单元110的阳极的电压流向电压复位端。
第N+2行发光组中，复位开关T1第一端还连接第N+2行发光组中发光单元的阳极，第二端连接电压复位端；电压复位时，发光单元110的阳极的电压流向电压复位端。
单向开关50设于第N行复位开关T1和第N+1行复位开关T1之间的线路中，单向开关50还设于第N+1行复位开关T1和第N+2行复位开关T1之间的线路中。单向开关用于单向导通第N行复位开关至第N+1行复位开关的线路，由此，保证发光单元110的阳极的电压是流向电压复位端20的。避免充电端40的电压经过单向开关50反向流向上一行发光单元110中。也可以理解为电压复位端20延伸一条同时连接第N行到第N+2行的线路。
在其中一个方面，显示驱动电路还包括公共端30和公共线，公共线自公共端30延伸，每组发光组10中的第一控制开关T2的第二端分别连接公共线。多组发光单元110共用一组公共线，减少公共端30的引线，简化电路设计。
在其中一个方面，发光组10包括多个发光单元110，多个发光单元110并联连接。并联的发光单元110的阴极连接同一条阴极线，并联的发光单元110的阳极连接同一条阳极线。第一控制开关T2设置在阴极线上，第二控制开关T3设置在阳极线上。通过第一控制开关T2和第二控制开关T3能够完成对多个并联的发光单元110的通断控制。
显示驱动电路包括多个充电端40，每一发光组10对应设置一充电端40，充电端40用于向对应的发光组10提供的充电电压。每组充电端40向对应发光组10提供的充电电压大小可以相同，也可以不同。通常来说，每组充电端40提供的充电电压大小不同，显示驱动电路根据显示要求，向每组充电端40提供大小不同的充电电压。
实施例二
参阅图5所示，本申请还提供一种显示驱动方法，显示驱动方法应用于显示驱动电路，显示驱动方法包括：
步骤S10，向第一控制开关发送第一控制信号，第一控制开关响应第一控制信号，第一控制开关的第一端和第二端断开，使发光单元的阴极和公共端断开；
步骤S20，向第二控制开关发送第二控制信号，第二控制开关响应第二控制信号，第二控制开关的第一端和第二端断开，使发光单元的阳极和充电端断开。
通过步骤S10和步骤S20，第一控制开关响应第一控制信号，第二控制开关响应第二控制信号。在发光单元熄灭后，第一控制开关控制发光单元的阴极和公共端的断开，减少外界对发光单元的阴极影响。第二控制开关在充电端完成对发光单元的充电后，使发光单元的阳极和充电端断开，减少外界对发光单元的阳极影响。发光单元在完成点亮后，发光单元熄灭，发光单元的阳极和阴极均断开了和外界的连接。由此，外界的电流不会进入到发光单元中，减少了外界电流对发光单元的影响。进而减少显示面板的亮度出现闪烁，保证显示面板能够正常显示。
参阅图4和图6所示，本申请还提供一种显示驱动方法，显示驱动方法应用于显示驱动电路，显示驱动电路中一组发光组对应设置一行扫描线，第1行扫描线对应连接第1行发光组10中的复位开关T1、第一控制开关T2、以及第二控制开关T3的控制端，第1行扫描线用于提供第一扫描信号；
第N行扫描线连接第N行发光组10中的复位开关T1、第一控制开关T2和第二控制开关T3的控制端，第N行扫描线用于提供第N扫描信号；
显示驱动方法包括：
步骤S100，复位阶段，向发光组10提供扫描信号，每组扫描信号均为低电平，每组发光组10中复位开关T1导通，第一控制开关T2和第二控制开关T3断开，每组发光组10中的发光单元110的阳极连通电压复位端20；复位阶段为S1阶段，第1扫描信号为CK1。同时完成每组发光组10中发光单元110的电压复位。需要强调的是，第1行发光单元110的电压复位中，由于起始状态充电端40还没有介入工作，发光单元110的阳极电压为0。这样，在复位阶段，对第1行的发光单元110来说，电压是由电压复位端20流向发光单元110。从第2行开始，显示驱动电路中充电端40已经开始充电。为了拉低发光单元110的阳极电压，在复位阶段，第2行开始发光单元110的阳极电压是流向电压复位端20的。
响应开关的第一端为源极，第二端为漏极，控制端为栅极。通常源极作为电压信号的输入端，漏极作为电压信号的输出端。因此，对第1行的发光组10来说，复位开关T1的源极连接电压复位端20，漏极连接发光单元110的阳极。电压是从电压复位端20流向发光单元110的阳极。对于第2行的发光组10来说，复位开关T1的源极连接发光单元110的阳极，漏极连接电压复位端20，电压是从发光单元110的阳极流向电压复位端20。
步骤S200，首行充电阶段，第一扫描信号为高电平，其余扫描信号为低电平，第1行发光组10中的复位开关T1断开、第一控制开关T2和第二控制开关T3导通，充电端40向第1行发光组10充电，其余发光组10处于复位阶段；其中，复位开关T1为P型场效应管，第一控制开关和第二控制开关T3为N型场效应管。首行充电阶段，对应S2阶段，可见S2阶段CK1的电平为高电平，CK2、CK3和CK4为低电平，此时进行第1行的发光组点亮。
步骤S300，第N行充电阶段，第N行扫描信号为高电平，其余扫描信号为低电平，第N行发光组10中的复位开关T1断开、第一控制开关和第二控制开关T3导通，充电端40向对应第N行发光组10充电，其中，第N-1行中的第一控制开关T2断开；第N-1行可以理解为第1行，在进行第2行点亮时，断开第1行的外界连接，避免第1行的发光组10受到外界影响。
第N行充电阶段在S3阶段，第N行扫描信号为CK2，可见S3阶段CK2的电平为高电平，CK1、CK3和CK4为低电平，此时进行第N行的发光组点亮，也可以理解为是第2行发光组的点亮。
步骤S400，第N+1行充电阶段，第N+1行扫描信号为高电平，其余扫描信号为 低电平，第N+1行发光组10中的复位开关T1断开、第一控制开关和第二控制开关T3导通，充电端40向对应第N+1行发光组10充电，其中，第N行中的第一控制开关T2断开，第N+1行可以理解为第3行，在进行第3行点亮时，断开第2行发光组的外界连接，避免第2行的发光组10受到外界影响。
第N+1行充电阶段在S4阶段，第N+1行扫描信号为CK3，可见S4阶段CK3的电平为高电平，CK1、CK2和CK4为低电平，此时进行第N+1行的发光组点亮，也可以理解为是第3行发光组的点亮。
进一步地，可以将第N+2行扫描信号理解为CK4，第N+2行充电阶段，第N+2行扫描信号为高电平，其余扫描信号为低电平，第N+2行发光组10中的复位开关T1断开、第一控制开关和第二控制开关T3导通，充电端40向对应第N+2行发光组10充电，其中，第N+1行中的第一控制开关T2断开。在S5阶段对第N+2行发光组10进行充电。可见S5阶段CK4的电平为高电平，CK1、CK2和CK3为低电平，此时进行第N+2行的发光组点亮，也可以理解为是第4行发光组的点亮。
S2阶段到S5阶段可以理解为一个扫描周期，S6阶段重新对第1行发光组10进行充电点亮。由此可知，4行发光组对应完成一个扫描周期，因此发光组的设置数量，在显示面板中至少4行发光组，或者是4的整数倍行数。
由此可知，充电阶段是由首行到第N+2行逐行进行扫描充电的，在上一行完成扫描充电后，上一行完成了点亮。在进行下一行的扫描点亮时，上一行的发光组10中，发光单元110的阳极和阴极均断开了与外界的联系，这样后续的发光组10点亮不会影响到上一行的发光单元110，从而减少上一行发光单元110的意外闪烁。
实施例三
参阅图7所示，本申请还提供一种显示装置，显示装置包括显示面板60，显示面板60具有显示区610和非显示区620，非显示区620设于显示区610的周边，显示装置还包括显示驱动电路，显示驱动电路包括发光组10，发光组10包括：复位开关T1、第一控制开关T2和第二控制开关T3。复位开关T1、第一控制开关T2和第二控制开关T3设于非显示区620，发光单元110位于显示区610。这样，非显示区620位于显示面板60的边框，复位开关T1、第一控制开关T2和第二控制开关T3充分利用显示面板60的边框位置，减少对显示画面的影响。
发光组10包括：通过复位开关T1、第一控制开关T2和第二控制开关T3对发光单元110的输入端的线路、以及输出端的线路进行控制，从而完成发光单元110的输 入端和输出端的通断控制。继而使发光单元110断开和外界的连接。发光单元110的输入端为发光单元110的阴极，发光单元110的输出端为发光单元110的阳极。
复位开关T1的一端用于连接电压复位端20，另一端连接发光单元110的阳极，复位开关T1用于响应复位信号，以使发光单元110的阳极和电压复位端20连通；电压复位端20用于提供复位电压，在每次点亮发光单元110前，向发光单元110提供复位电压，复位电压提供至发光单元110的阳极，完成发光单元110的电压复位。使发光单元110在充电前保持相同的基准电压，该基准电压就可以理解为复位电压。
也就是说，发光单元110在相同的基准电压下进行充电，如果基准电压不同，发光单元110的亮度也会出现不同，容易导致发光单元110的亮度超出了点亮要求或低于点亮要求。因此，通过复位电压，让每组发光单元110中的起始基准电压相同。便于对发光单元110的亮度进行控制。
第一控制开关T2的一端连接发光单元110的阴极，另一端用于连接公共端30，第一控制开关T2用于响应第一控制信号，以使发光单元110的阴极和公共端30断开；公共端30可以理解为公共接地端，公共接地端的电压较低，低于发光单元110的阳极电压。发光单元110的阴极连接公共端30保证发光单元110的阳极电压高于阴极电压，确保发光单元110的阳极电位高于阴极电位，使电压由高电位流向低电压，保证发光单元110顺利点亮。
第二控制开关T3的一端用于连接充电端40，另一端连接发光单元110的阳极，第二控制开关T3用于响应第二控制信号，以使发光单元110的阳极和充电端40断开。在充电端40完成对发光单元110的充电点亮后，通过第二控制开关T3响应第二控制信号，使发光单元110的阳极和充电端40断开，避免发光单元110在受到充电端40的电压影响。
虽然已参照几个典型实施方式描述了本申请，但应当理解，所用的术语是说明和示例性、而非限制性的术语。由于本申请能够以多种形式具体实施而不脱离发明的精神或实质，所以应当理解，上述实施方式不限于任何前述的细节，而应在随附权利要求所限定的精神和范围内广泛地解释，因此落入权利要求或其等效范围内的全部变化和改型都应为随附权利要求所涵盖。

Claims (21)

  1. 一种显示驱动电路，所述显示驱动电路包括发光组，所述发光组包括发光单元，所述发光组还包括：
    第一控制开关，所述第一控制开关的第一端连接所述发光单元的阴极，第二端用于连接公共端，控制端连接第一信号线，所述第一信号线用于提供第一控制信号；以及
    第二控制开关，所述第二控制开关的第一端用于连接充电端，第二端连接所述发光单元的阳极，控制端连接第二信号线，所述第二信号线用于提供第二控制信号；
    其中，所述发光单元熄灭时，所述第一控制开关响应所述第一控制信号，使所述发光单元的阴极和所述公共端断开，所述第二控制开关响应所述第二控制信号，使所述发光单元的阳极和所述充电端断开。
  2. 根据权利要求1所述的显示驱动电路，其中，所述发光组还包括复位开关，所述复位开关的一端用于连接电压复位端，另一端连接所述发光单元的阳极，控制端连接复位信号线，所述电压复位端用于提供复位电压，所述复位信号线用于提供复位信号；
    所述发光单元熄灭时，所述复位开关响应所述复位信号，以使所述发光单元的阳极和所述电压复位端连通；所述电压复位端提供复位电压至所述发光单元的阳极，以使所述发光单元在充电前保持相同的基准电压。
  3. 根据权利要求2所述的显示驱动电路，其中，所述复位开关、所述第一控制开关和所述第二控制开关连接同一扫描端，所述复位信号、所述第一控制信号和所述第二控制信号为同一扫描信号；
    所述复位开关为P型场效应管和N型场效应管其中一种，所述第一控制开关和所述第二控制开关为P型场效应管和N型场效应管其中剩余的一种。
  4. 根据权利要求3所述的显示驱动电路，其中，所述复位开关的第二端连接所述第二控制开关的第二端。
  5. 根据权利要求3所述的显示驱动电路，其中，所述发光组设置有N行，2≤N，N为正整数；
    第1行发光组中，复位开关的第一端连接所述电压复位端，第二端对应连接第1行发光组中发光单元的阳极；
    第N行发光组中，复位开关的第一端连接第N行发光组中发光单元的阳极，第二端连接所述电压复位端；
    所述显示驱动电路还包括单向开关，所述单向开关设于第N行复位开关和所述电压复位端之间。
  6. 根据权利要求5所述的显示驱动电路，其中，所述显示驱动电路还包括公共 线，所述公共线自所述公共端延伸，每组所述发光组中的第一控制开关的第二端分别连接所述公共线。
  7. 根据权利要求6所述的显示驱动电路，其中，多组所述发光单元共用一组所述公共线。
  8. 根据权利要求1所述的显示驱动电路，其中，所述发光组包括多个所述发光单元，多个所述发光单元之间并联连接；
    所述显示驱动电路包括多个所述充电端，每一所述发光组对应设置一所述充电端，所述充电端用于向对应的所述发光组提供充电电压。
  9. 根据权利要求8所述的显示驱动电路，其中,每组所述充电端向对应的所述发光组提供的充电电压大小相同或不同。
  10. 根据权利要求1所述的显示驱动电路，其中,所述公共端为公共接地端，所述公共接地端的电压低于所述发光单元的阳极电压。
  11. 一种显示驱动方法，其中，所述显示驱动方法应用于如权利要求1所述的显示驱动电路，所述显示驱动方法包括：
    向所述第一控制开关发送第一控制信号，所述第一控制开关响应所述第一控制信号，所述第一控制开关的第一端和第二端断开，使所述发光单元的阴极和所述公共端断开；
    向所述第二控制开关发送第二控制信号，所述第二控制开关响应所述第二控制信号，所述第二控制开关的第一端和第二端断开，使所述发光单元的阳极和所述充电端断开。
  12. 根据权利要求11所述的显示驱动方法，其中，所述显示驱动方法应用于如权利要求5所述的显示驱动电路，所述显示驱动电路中一组所述发光组对应设置一行扫描线，第1行扫描线对应连接第1行发光组中的所述复位开关、所述第一控制开关、以及所述第二控制开关的控制端，第1行扫描线用于提供第一扫描信号；
    第N行扫描线连接第N行发光组中的所述复位开关、所述第一控制开关和所述第二控制开关的控制端，第N行扫描线用于提供第N扫描信号，所述复位开关为P型场效应管，所述第一控制开关和所述第二控制开关为N型场效应管；
    所述显示驱动方法包括：
    复位阶段，向所述发光组提供扫描信号，每组所述扫描信号均为低电平，每组所述发光组中所述复位开关导通，所述第一控制开关和所述第二控制开关断开，每组所述发光组中的发光单元的阳极连通所述电压复位端；
    首行充电阶段，所述第一扫描信号为高电平，其余扫描信号为低电平，第1行所述发光组中的所述复位开关断开、所述第一控制开关和第二控制开关导通，所述充电端向第1行所述发光组充电，其余所述发光组处于复位阶段；
    第N行充电阶段，第N行扫描信号为高电平，其余扫描信号为低电平，第N行 所述发光组中的复位开关断开、所述第一控制开关和第二控制开关导通，所述充电端向对应第N行所述发光组充电，其中，第N-1行中的复位开关断开；
    第N+1行充电阶段，第N+1行扫描信号为高电平，其余扫描信号为低电平，第N+1行所述发光组中的复位开关断开、所述第一控制开关和第二控制开关导通，所述充电端向对应第N+1行所述发光组充电，其中，第N行中的复位开关断开。
  13. 一种显示装置，所述显示装置包括显示面板，所述显示面板具有显示区和非显示区，所述非显示区设于所述显示区的周边，其中，所述显示装置还包括显示驱动电路，所述显示驱动电路包括发光组，所述发光组包括发光单元，所述发光组还包括：
    第一控制开关，所述第一控制开关的第一端连接所述发光单元的阴极，第二端用于连接公共端，控制端连接第一信号线，所述第一信号线用于提供第一控制信号；以及
    第二控制开关，所述第二控制开关的第一端用于连接充电端，第二端连接所述发光单元的阳极，控制端连接第二信号线，所述第二信号线用于提供第二控制信号；
    其中，所述发光单元熄灭时，所述第一控制开关响应所述第一控制信号，使所述发光单元的阴极和所述公共端断开，所述第二控制开关响应所述第二控制信号，使所述发光单元的阳极和所述充电端断开；
    所述第一控制开关和所述第二控制开关设于所述非显示区，所述发光单元位于所述显示区。
  14. 根据权利要求13所述的显示装置，其中，所述发光组还包括复位开关，所述复位开关的一端用于连接电压复位端，另一端连接所述发光单元的阳极，控制端连接复位信号线，所述电压复位端用于提供复位电压，所述复位信号线用于提供复位信号；
    所述发光单元熄灭时，所述复位开关响应所述复位信号，以使所述发光单元的阳极和所述电压复位端连通；所述电压复位端提供复位电压至所述发光单元的阳极，以使所述发光单元在充电前保持相同的基准电压。
  15. 根据权利要求14所述的显示装置，其中，所述复位开关、所述第一控制开关和所述第二控制开关连接同一扫描端，所述复位信号、所述第一控制信号和所述第二控制信号为同一扫描信号。
  16. 根据权利要求15所述的显示装置，其中，所述复位开关为P型场效应管和N型场效应管其中一种，所述第一控制开关和所述第二控制开关为P型场效应管和N型场效应管其中剩余的一种。
  17. 根据权利要求15所述的显示装置，其中，所述复位开关的第二端连接所述第二控制开关的第二端。
  18. 根据权利要求15所述的显示装置，其中，所述发光组设置有N行，2≤N，N为正整数；
    第1行发光组中，复位开关的第一端连接所述电压复位端，第二端对应连接第1行发光组中发光单元的阳极；
    第N行发光组中，复位开关的第一端连接第N行发光组中发光单元的阳极，第二端连接所述电压复位端；
    所述显示驱动电路还包括单向开关，所述单向开关设于第N行复位开关和所述电压复位端之间。
  19. 根据权利要求18所述的显示装置，其中，所述显示驱动电路还包括公共线，所述公共线自所述公共端延伸，每组所述发光组中的第一控制开关的第二端分别连接所述公共线。
  20. 根据权利要求18所述的显示装置，其中，所述显示驱动电路中一组所述发光组对应设置一行扫描线，第1行扫描线对应连接第1行发光组中的所述复位开关、所述第一控制开关、以及所述第二控制开关的控制端，第1行扫描线用于提供第一扫描信号；
    第N行扫描线连接第N行发光组中的所述复位开关、所述第一控制开关和所述第二控制开关的控制端，第N行扫描线用于提供第N扫描信号。
  21. 根据权利要求13所述的显示装置，其中，所述发光组包括多个所述发光单元，多个所述发光单元之间并联连接；
    所述显示驱动电路包括多个所述充电端，每一所述发光组对应设置一所述充电端，所述充电端用于向对应的所述发光组提供充电电压。
PCT/CN2023/102081 2022-10-28 2023-06-25 显示驱动电路、显示驱动方法和显示装置 Ceased WO2024087680A1 (zh)

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