WO2022246885A1 - 驱动电路及面板 - Google Patents

驱动电路及面板 Download PDF

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Publication number
WO2022246885A1
WO2022246885A1 PCT/CN2021/098047 CN2021098047W WO2022246885A1 WO 2022246885 A1 WO2022246885 A1 WO 2022246885A1 CN 2021098047 W CN2021098047 W CN 2021098047W WO 2022246885 A1 WO2022246885 A1 WO 2022246885A1
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WO
WIPO (PCT)
Prior art keywords
field effect
effect transistor
current
current output
switching element
Prior art date
Application number
PCT/CN2021/098047
Other languages
English (en)
French (fr)
Inventor
刘金风
Original Assignee
Tcl华星光电技术有限公司
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Tcl华星光电技术有限公司 filed Critical Tcl华星光电技术有限公司
Priority to US17/427,583 priority Critical patent/US20240038139A1/en
Publication of WO2022246885A1 publication Critical patent/WO2022246885A1/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
    • G09G3/3406—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
    • G09G3/22—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]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • 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
    • G09G2310/0272—Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • 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]
    • G09G3/3225—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 an active matrix
    • G09G3/3233—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 an active matrix with pixel circuitry controlling the current through the light-emitting element
    • G09G3/3241—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 an active matrix with pixel circuitry controlling the current through the light-emitting element the current through the light-emitting element being set using a data current provided by the data driver, e.g. by using a two-transistor current mirror
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits

Definitions

  • the present application relates to the field of display technology, in particular to a driving circuit and a panel.
  • Mini-LED panels and Micro-LED panels are mostly used in backlighting.
  • the panels can be finely controlled in very small partitions to achieve high-quality display effects.
  • the embodiment of the present application provides a driving circuit and a panel, which can simplify the driving circuit and achieve the effect of cost saving.
  • An embodiment of the present application provides a driving circuit, which includes:
  • a current mirror module the current mirror module is used to output different currents according to different control signals
  • the dimming module is connected to the current mirror module, and the dimming module is used to amplify the current to form a driving current
  • a light emitting device the light emitting device is connected to the dimming module, and the light emitting device correspondingly emits light with different brightnesses according to different driving currents.
  • the current mirror module includes:
  • the reference current unit is used to provide a reference current
  • a current output regulation unit the current output regulation unit is connected to the reference current unit, the current output regulation unit is used to output a corresponding total current according to the control signal, and the total current output by the current output regulation unit is the reference n times the current, n ⁇ 1.
  • the current output regulation unit includes a plurality of current output subunits arranged in parallel, and the current output regulation unit is used to control the corresponding current output subunits according to the control signal.
  • the unit is turned on and off, thereby controlling the output of the total current; the current output by each of the current output subunits is m times the reference current, m>0.
  • the reference current unit includes a first resistor and a first field effect transistor, one end of the first resistor is connected to the reference voltage, and the other end of the first resistor is connected to A control voltage is connected to the first terminal and the gate of the first field effect transistor, and the second terminal of the first field effect transistor is connected.
  • each of the current output subunits includes a field effect transistor and a switching element
  • the gate of the field effect transistor is connected to the gate of the first field effect transistor, and the first end of the field effect transistor is connected to the input end of the switching element , the second end of the field effect transistor is connected to the second end of the first field effect transistor; the control end of the switching element is connected to the switch control signal, and the output end of the switching element is connected to the dimming module.
  • the current output regulation unit includes a first current output subunit, a second current output subunit, and a third current output subunit;
  • the first current output subunit includes a second field effect transistor and a first switch element
  • the second current output subunit includes a third field effect transistor and a second switch element
  • the third current output subunit includes a first Four field effect transistors and a third switching element
  • the first end of the second field effect transistor is connected to the input end of the first switching element, the first end of the third field effect transistor is connected to the input end of the second switching element, and the fourth field effect transistor is connected to the input end of the second switching element.
  • the first end of the field effect transistor is connected to the input end of the third switching element;
  • the gates of the second field effect transistor, the third field effect transistor, and the fourth field effect transistor are all connected to the gate of the first field effect transistor, and the second field effect transistor, the Both the second ends of the third field effect transistor and the fourth field effect transistor are connected to the second end of the first field effect transistor;
  • the control terminal of the first switch element is connected to the first switch control signal
  • the control terminal of the second switch element is connected to the second switch control signal
  • the control terminal of the third switch element is connected to the third switch control signal ;
  • the output terminals of the first switch element, the second switch element and the third switch element are all connected to the dimming module.
  • the dimming module includes:
  • the first end of the second resistor is connected to the output end of the current output regulation unit
  • a switch unit the switch unit is connected to the second end of the second resistor, and the switch unit is used to control the conduction and interruption of the current path of the dimming module;
  • An amplifying unit configured to amplify the current output by the current mirror module to form the driving current for driving the light emitting device.
  • the switching unit includes a fourth switching element and a fifth switching element; the gates of the fourth switching element and the fifth switching element are connected to the same scanning signal , the first ends of the fourth switch element and the fifth switch element are both connected to the second end of the second resistor.
  • the amplifying unit includes a capacitor, a fifth field effect transistor, and a sixth field effect transistor; the first ends of the capacitors are respectively connected to the first terminals of the fourth switching element. Two terminals, the gate of the fifth field effect transistor and the gate of the sixth field effect transistor, the second end of the capacitor is respectively connected to the first end of the fifth field effect transistor, the first terminal of the sixth field effect transistor The first end and the ground end of the six field effect transistors; the second end of the fifth field effect transistor is connected to the second end of the fifth switching element; the second end of the sixth field effect transistor is connected to the the anode of the light-emitting device;
  • the cathode of the light emitting device is connected to the cathode voltage.
  • the amplifying unit has an amplification factor k
  • the total current output by the current output regulation unit is I data
  • the driving current output by the amplifying unit is k*I data , 5 ⁇ k ⁇ 15.
  • the present application also relates to a panel, wherein the panel includes a driving circuit, and the driving circuit includes:
  • a current mirror module the current mirror module is used to output different currents according to different control signals
  • the dimming module is connected to the current mirror module, and the dimming module is used to amplify the current to form a driving current
  • a light-emitting device the light-emitting device is connected to the dimming module, and the light-emitting device correspondingly emits light with different brightnesses according to different driving currents;
  • the panel also includes a light-emitting substrate and a driver chip electrically connected to the light-emitting substrate, the current mirror module is integrated on the driver chip, and the dimming module is arranged on the display substrate.
  • the panel is a display panel or a backlight panel.
  • the current mirror module includes:
  • the reference current unit is used to provide a reference current
  • a current output regulation unit the current output regulation unit is connected to the reference current unit, the current output regulation unit is used to output a corresponding total current according to the control signal, and the total current output by the current output regulation unit is the reference n times the current, n ⁇ 1.
  • the current output regulation unit includes a plurality of current output subunits arranged in parallel, and the current output regulation unit is used to control the corresponding current output subunits according to the control signal.
  • the unit is turned on and off, thereby controlling the output of the total current; the current output by each of the current output subunits is m times the reference current, m>0.
  • the reference current unit includes a first resistor and a first field effect transistor, one end of the first resistor is connected to the reference voltage, and the other end of the first resistor is connected to A control voltage is connected to the first terminal and the gate of the first field effect transistor, and the second terminal of the first field effect transistor is connected.
  • each of the current output subunits includes a field effect transistor and a switching element
  • the gate of the field effect transistor is connected to the gate of the first field effect transistor, and the first end of the field effect transistor is connected to the input end of the switching element , the second end of the field effect transistor is connected to the second end of the first field effect transistor; the control end of the switching element is connected to the switch control signal, and the output end of the switching element is connected to the dimming module.
  • the current output regulation unit includes a first current output subunit, a second current output subunit, and a third current output subunit;
  • the first current output subunit includes a second field effect transistor and a first switch element
  • the second current output subunit includes a third field effect transistor and a second switch element
  • the third current output subunit includes a first Four field effect transistors and a third switching element
  • the first end of the second field effect transistor is connected to the input end of the first switching element, the first end of the third field effect transistor is connected to the input end of the second switching element, and the fourth field effect transistor is connected to the input end of the second switching element.
  • the first end of the field effect transistor is connected to the input end of the third switching element;
  • the gates of the second field effect transistor, the third field effect transistor, and the fourth field effect transistor are all connected to the gate of the first field effect transistor, and the second field effect transistor, the Both the second ends of the third field effect transistor and the fourth field effect transistor are connected to the second end of the first field effect transistor;
  • the control terminal of the first switch element is connected to the first switch control signal
  • the control terminal of the second switch element is connected to the second switch control signal
  • the control terminal of the third switch element is connected to the third switch control signal ;
  • the output terminals of the first switch element, the second switch element and the third switch element are all connected to the dimming module.
  • the dimming module includes:
  • the first end of the second resistor is connected to the output end of the current output regulation unit
  • a switch unit the switch unit is connected to the second end of the second resistor, and the switch unit is used to control the conduction and interruption of the current path of the dimming module;
  • An amplifying unit configured to amplify the current output by the current mirror module to form the driving current for driving the light emitting device.
  • the switching unit includes a fourth switching element and a fifth switching element; the gates of the fourth switching element and the fifth switching element are connected to the same scanning signal , the first ends of the fourth switch element and the fifth switch element are both connected to the second end of the second resistor.
  • the amplifying unit includes a capacitor, a fifth field effect transistor, and a sixth field effect transistor; the first ends of the capacitors are respectively connected to the first terminals of the fourth switching element. Two terminals, the gate of the fifth field effect transistor and the gate of the sixth field effect transistor, the second end of the capacitor is respectively connected to the first end of the fifth field effect transistor, the first terminal of the sixth field effect transistor The first end and the ground end of the six field effect transistors; the second end of the fifth field effect transistor is connected to the second end of the fifth switching element; the second end of the sixth field effect transistor is connected to the the anode of the light-emitting device;
  • the cathode of the light emitting device is connected to the cathode voltage.
  • the amplifying unit has an amplification factor k
  • the total current output by the current output regulation unit is I data
  • the driving current output by the amplifying unit is k*I data , 5 ⁇ k ⁇ 15.
  • the current mirror module can be controlled according to the control signal to output different currents; then the output current is amplified by the dimming module to drive the light-emitting device; wherein the current mirror module can output different currents, so that the light-emitting devices have different luminescence Brightness, while the dimming module amplifies the current so that the light emitting device can work normally, and can reduce the load of the current mirror module.
  • FIG. 1 is a schematic structural diagram of a driving circuit provided in an embodiment of the present application
  • Fig. 2 is a circuit diagram of a driving circuit provided by an embodiment of the present application.
  • Fig. 3 is a schematic structural diagram of a panel provided by an embodiment of the present application.
  • Embodiments of the present application provide a driving circuit and a panel, which will be described in detail below.
  • the embodiment of the present application provides a driving circuit 10 for a panel 100 .
  • the driving circuit 10 includes a current mirror module 11 , a dimming module 12 and a light emitting device LD.
  • the current mirror module 11 is used to output different currents according to different control signals.
  • the dimming module 12 is connected to the current mirror module 11 .
  • the dimming module 12 is used for amplifying the current to form a driving current.
  • the light emitting device LD is connected to the dimming module 12 .
  • the light emitting device LD correspondingly emits light with different brightness according to different driving currents.
  • the embodiment of the present application can control the current mirror module 11 according to the control signal to output different currents; then the output current drives the light emitting device LD under the amplification of the dimming module 12; wherein the current mirror module 11 can output different currents, so that the light emitting device LDs have different luminances, and the dimming module 12 amplifies the output current of the current mirror module 11 to make the light emitting device LD work normally and reduce the load of the current mirror module 11 .
  • control signal may be one of a viewing angle mode signal, a video source signal, and a brightness signal, and of course it may also be other control signals.
  • the light emitting device LD may be one of an organic light emitting diode light emitting device, a Mini-LED light emitting device and a micro LED light emitting device. This embodiment is described by taking the light emitting device LD as a Mini-LED light emitting device as an example, but it is not limited thereto.
  • the current mirror module 11 includes a reference current unit 111 and a current output regulation unit 112 .
  • the reference current unit 111 is used for providing a reference current.
  • the current output regulation unit 112 is connected to the reference current unit 111 .
  • the current output regulation unit 112 is configured to output a corresponding total current according to the control signal, and the total current output by the current output regulation unit 112 is n times the reference current, where n ⁇ 1.
  • the first brightness of the light emitting device LD corresponds to 1 time of the reference current
  • the second brightness of the light emitting device LD corresponds to twice the reference current
  • the third brightness of the light emitting device LD corresponds to 3 times of the reference current, that is, luminescence
  • the nth brightness of the device LD corresponds to n times of the reference current; if the light emitting device LD needs to emit the nth brightness, the total current output by the current output regulation unit 112 is controlled to be n times of the reference current.
  • the luminance of the light emitting device LD may also correspond to a non-integer multiple of the reference current, and the specific corresponding relationship may be adjusted according to actual conditions, which will not be repeated here.
  • the current output regulating unit 112 includes a plurality of current output subunits 11a arranged in parallel.
  • the current output regulating unit 112 is configured to control the on and off of the corresponding current output sub-unit 11a according to the control signal, and then control the output of the total current.
  • the current output by each of the current output subunits 11a is m times the reference current, m>0.
  • the total current output by the current output regulating unit 112 is the sum of the actual output currents of the multiple current output sub-units 11a.
  • the total current output by the current output control unit 112 has 8 optional total output currents: 0 times, 1 times the reference current, 2 times the reference current, 1+2 times the reference current, 4 times the reference current, 2+3 times the reference current, 2+4 times reference current and 1+2+4 times reference current.
  • 8 different total currents correspond to 8 different luminous luminances of the light emitting device LD. Therefore, if the present embodiment requires the light-emitting device LD to have more different light-emitting brightnesses, the number of current output subunits 11a can be increased accordingly; for example, if the light-emitting device LD is required to have 16 different light-emitting brightnesses, then the Adding a current output sub-unit 11a with 8 times the reference current output in parallel can be added on the basis of .
  • the current output by the current output subunit 11a may also be a non-integer multiple of the reference current, such as 1/2, 3/4, 3/2, 9/4, and 18/5.
  • the reference current unit 111 includes a first resistor R1 and a first field effect transistor M1.
  • One end of the first resistor R1 is connected to the reference voltage Vref, and the other end of the first resistor R1 is connected to the first end and the gate of the first field effect transistor M1.
  • the second end of the first field effect transistor M1 is connected to the control voltage V0.
  • Each of the current output subunits 11a includes a field effect transistor M and a switching element P.
  • the gate of the field effect transistor M is connected to the gate of the first field effect transistor M1, and the first end of the field effect transistor M is connected to the switch
  • the input end of the element P, the second end of the field effect transistor M is connected to the second end of the first field effect transistor M1.
  • the control terminal of the switch element P is connected to the switch control signal VS, and the output terminal of the switch element P is connected to the dimming module 12 .
  • the switch element P when the switch control signal VS is at a high level, the switch element P is turned on; when the switch control signal VS is at a low level, the switch element P is turned off.
  • the switch element P when the switch control signal VS is at a low level, the switch element P is turned on; when the switch control signal VS is at a high level, the switch element P is turned off.
  • the field effect transistor M may be an N-type field effect transistor or a P-type field effect transistor.
  • the switching tube element P may be a field effect tube or a triode.
  • each current output subunit 11a can determine different output currents of the current output subunit 11a by selecting field effect transistors with different channel width to length ratios.
  • the current output regulation unit 112 includes a first current output subunit 11a1, a second current output subunit 11a2, and a third current output subunit 11a3.
  • the first current output subunit 11a1 includes a second field effect transistor M2 and a first switching element P1.
  • the second current output subunit 11a2 includes a third field effect transistor M3 and a second switch element P2.
  • the third current output subunit 11a3 includes a fourth field effect transistor M4 and a third switch element P3.
  • the first end of the second field effect transistor M2 is connected to the input end of the first switching element P1
  • the first end of the third field effect transistor M3 is connected to the input end of the second switching element P2
  • a first end of the fourth field effect transistor M4 is connected to an input end of the third switching element P3.
  • the gates of the second FET M2 , the third FET M3 and the fourth FET M4 are all connected to the gate of the first FET M1 .
  • Second ends of the second field effect transistor M2, the third field effect transistor M3 and the fourth field effect transistor M4 are all connected to the second end of the first field effect transistor M1.
  • a control terminal of the first switch element P1 is connected to a first switch control signal VS1.
  • the control terminal of the second switch element P2 is connected to the second switch control signal VS2.
  • the control terminal of the third switch element P3 is connected to the third switch control signal VS3.
  • the output terminals of the first switch element P1 , the second switch element P2 and the third switch element P3 are all connected to the dimming module 12 .
  • the current output regulation unit 112 includes three current output sub-units 11a as an example for illustration, but it is not limited thereto.
  • the dimming module 12 includes a second resistor R2 , a switch unit 121 and an amplification unit 122 .
  • the first end of the second resistor R2 is connected to the output end of the current output regulating unit 112 .
  • the switch unit 121 is connected to the second end of the second resistor R2, and the switch unit 121 is used to control the conduction and disconnection of the current path of the dimming module 12 .
  • the amplifying unit 122 is used for amplifying the current output by the current mirror module 11 to form the driving current for driving the light emitting device LD.
  • the arrangement of the amplifying unit 122 can reduce the load of the current mirror module 11, that is, the current mirror module 11 can output a smaller current, and the amplifying unit 122 can drive the light emitting device LD to work normally.
  • the switch unit 121 includes a fourth switch element P4 and a fifth switch element P5. Gates of the fourth switching element P4 and the fifth switching element P5 are connected to the same scan signal SCAN. First ends of the fourth switch element P4 and the fifth switch element P5 are both connected to the second end of the second resistor R2.
  • the same scan signal SCAN is used to simultaneously control the fourth switching element P4 and the fifth switching element P5 to be turned on or off simultaneously.
  • the amplifying unit 122 includes a capacitor C, a fifth field effect transistor M5 and a sixth field effect transistor M6.
  • the first terminal of the capacitor C is respectively connected to the second terminal of the fourth switching element P4, the gate of the fifth field effect transistor M5 and the gate of the sixth field effect transistor M6.
  • the second end of the capacitor C is respectively connected to the first end of the fifth field effect transistor M5, the first end of the sixth field effect transistor M6 and the ground end.
  • the second end of the fifth field effect transistor M5 is connected to the second end of the fifth switching element P5.
  • the second end of the sixth field effect transistor M6 is connected to the anode of the light emitting device LD; the cathode of the light emitting device LD is connected to the cathode voltage VLED.
  • the amplifying unit 122 has an amplification factor k, the total current output by the current output regulation unit 112 is I data , the driving current output by the amplifying unit 122 is k*I data , 5 ⁇ k ⁇ 15.
  • k can be 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15.
  • the value of k is selected through the channel modulation of the fifth field effect transistor M5 and the sixth field effect transistor M6. That is to say, if you choose field effect transistors with different channel width-to-length ratios, you will get different k values.
  • the present application also provides a panel 100 , and the panel 100 further includes a light emitting substrate FG and a driving chip CH electrically connected to the light emitting substrate FG.
  • the current mirror module 11 is integrated on the driving chip CH.
  • the dimming module 12 is disposed on the display substrate FG.
  • the setting of the dimming module 12 can reduce the load of the driving chip CH.
  • the panel 100 is a display panel or a backlight panel.
  • the embodiment of the present application can control the current mirror module 11 according to the control signal to output different currents; then the output current is amplified by the dimming module 12 to drive the light-emitting device; wherein the current mirror module 11 can output different currents, so that the light-emitting device LD There are different luminances, and the dimming module 12 amplifies the output current of the current mirror module 11 to make the light emitting device LD work normally and reduce the load of the driving chip CH.

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Abstract

一种驱动电路(10)及面板(100)，在驱动电路(10)中，电流镜模块(11)用于根据不同的控制信号(VS)输出不同电流；调光模块(12)连接于电流镜模块(11)，调光模块(12)用于放大电流形成驱动电流；发光器件(LD)连接于调光模块(12)，发光器件(LD)根据不同的驱动电流，对应发出不同亮度的光。

Description

驱动电路及面板 技术领域
本申请涉及显示技术领域，具体涉及一种驱动电路及面板。
 背景技术
目前，Mini-LED面板和Micro-LED面板多应用于背光，通过驱动***可对面板进行极小分区的精细化控制，达到高质量的显示效果。
在对现有技术的研究和实践过程中，本申请的发明人发现，目前的Mini-LED面板和Micro-LED面板的驱动***较为复杂，导致成本较高。
 技术问题
本申请实施例提供一种驱动电路及面板，可以简化驱动电路，达到节约成本的效果。
 技术解决方案
本申请实施例提供一种驱动电路，其包括：
电流镜模块，所述电流镜模块用于根据不同的控制信号输出不同电流；
调光模块，所述调光模块连接于所述电流镜模块，所述调光模块用于放大所述电流形成驱动电流；以及
发光器件，所述发光器件连接于所述调光模块，所述发光器件根据不同的所述驱动电流，对应发出不同亮度的光。
可选的，在本申请的一些实施例中，所述电流镜模块包括：
基准电流单元，所述基准电流单元用于提供基准电流；
电流输出调控单元，所述电流输出调控单元连接于所述基准电流单元，所述电流输出调控单元用于根据所述控制信号输出相应的总电流，所述电流输出调控单元输出的总电流是基准电流的n倍，n≥1。
可选的，在本申请的一些实施例中，所述电流输出调控单元包括多个并联设置的电流输出子单元，所述电流输出调控单元用于根据所述控制信号控制相应所述电流输出子单元的导通和关断，进而控制所述总电流的输出；每个所述电流输出子单元输出的电流是基准电流的m倍，m＞0。
可选的，在本申请的一些实施例中，所述基准电流单元包括第一电阻和第一场效应管，所述第一电阻的一端接入基准电压，所述第一电阻的另一端连接于所述第一场效应管的第一端和栅极，所述第一场效应管的第二端接入控制电压。
可选的，在本申请的一些实施例中，每一所述电流输出子单元包括一场效应管和一开关元件；
在每一所述电流输出子单元中，所述场效应管的栅极连接于所述第一场效应管的栅极，所述场效应管的第一端连接于所述开关元件的输入端，所述场效应管的第二端连接于所述第一场效应管的第二端；所述开关元件的控制端接入开关控制信号，所述开关元件的输出端连接于所述调光模块。
可选的，在本申请的一些实施例中，所述电流输出调控单元包括第一电流输出子单元、第二电流输出子单元和第三电流输出子单元；
所述第一电流输出子单元包括第二场效应管和第一开关元件，所述第二电流输出子单元包括第三场效应管和第二开关元件；所述第三电流输出子单元包括第四场效应管和第三开关元件；
所述第二场效应管的第一端连接于所述第一开关元件的输入端，所述第三场效应管的第一端连接于所述第二开关元件的输入端，所述第四场效应管的第一端连接于所述第三开关元件的输入端；
所述第二场效应管、所述第三场效应管、所述第四场效应管的栅极均连接于所述第一场效应管的栅极，所述第二场效应管、所述第三场效应管和所述第四场效应管的第二端均连接于所述第一场效应管的第二端；
所述第一开关元件的控制端接入第一开关控制信号，所述第二开关元件的控制端接入第二开关控制信号，所述第三开关元件的控制端接入第三开关控制信号；所述第一开关元件、所述第二开关元件和所述第三开关元件的输出端均连接于所述调光模块。
可选的，在本申请的一些实施例中，所述调光模块包括：
第二电阻，所述第二电阻的第一端连接于所述电流输出调控单元的输出端；
开关单元，所述开关单元连接于所述第二电阻的第二端，所述开关单元用于控制所述调光模块的电流路径的导通和截断；
放大单元，所述放大单元用于放大所述电流镜模块输出的电流，形成驱动所述发光器件的所述驱动电流。
可选的，在本申请的一些实施例中，所述开关单元包括第四开关元件和第五开关元件；所述第四开关元件和所述第五开关元件的栅极均接入同一扫描信号，所述第四开关元件和所述第五开关元件的第一端均连接于所述第二电阻的第二端。
可选的，在本申请的一些实施例中，所述放大单元包括电容、第五场效应管和第六场效应管；所述电容的第一端分别连接于所述第四开关元件的第二端、所述第五场效应管的栅极和所述第六场效应管的栅极，所述电容的第二端分别连接于所述第五场效应管的第一端、所述第六场效应管的第一端和接地端；所述第五场效应管的第二端连接于所述第五开关元件的第二端；所述第六场效应管的第二端连接于所述发光器件的阳极；
所述发光器件的阴极接入阴极电压。
可选的，在本申请的一些实施例中，所述放大单元具有放大系数k，所述电流输出调控单元输出的总电流为I data，所述放大单元输出的所述驱动电流为k*I data，5≤k≤15。
本申请还涉及一种面板，其中，所述面板包括驱动电路，所述驱动电路包括：
电流镜模块，所述电流镜模块用于根据不同的控制信号输出不同电流；
调光模块，所述调光模块连接于所述电流镜模块，所述调光模块用于放大所述电流形成驱动电流；以及
发光器件，所述发光器件连接于所述调光模块，所述发光器件根据不同的所述驱动电流，对应发出不同亮度的光；
所述面板还包括发光基板和电连接所述发光基板的驱动芯片，所述电流镜模块集成在所述驱动芯片上，所述调光模块设置在所述显示基板上。
可选的，在本申请的一些实施例中，所述面板为显示面板或背光面板。
可选的，在本申请的一些实施例中，所述电流镜模块包括：
基准电流单元，所述基准电流单元用于提供基准电流；
电流输出调控单元，所述电流输出调控单元连接于所述基准电流单元，所述电流输出调控单元用于根据所述控制信号输出相应的总电流，所述电流输出调控单元输出的总电流是基准电流的n倍，n≥1。
可选的，在本申请的一些实施例中，所述电流输出调控单元包括多个并联设置的电流输出子单元，所述电流输出调控单元用于根据所述控制信号控制相应所述电流输出子单元的导通和关断，进而控制所述总电流的输出；每个所述电流输出子单元输出的电流是基准电流的m倍，m＞0。
可选的，在本申请的一些实施例中，所述基准电流单元包括第一电阻和第一场效应管，所述第一电阻的一端接入基准电压，所述第一电阻的另一端连接于所述第一场效应管的第一端和栅极，所述第一场效应管的第二端接入控制电压。
可选的，在本申请的一些实施例中，每一所述电流输出子单元包括一场效应管和一开关元件；
在每一所述电流输出子单元中，所述场效应管的栅极连接于所述第一场效应管的栅极，所述场效应管的第一端连接于所述开关元件的输入端，所述场效应管的第二端连接于所述第一场效应管的第二端；所述开关元件的控制端接入开关控制信号，所述开关元件的输出端连接于所述调光模块。
可选的，在本申请的一些实施例中，所述电流输出调控单元包括第一电流输出子单元、第二电流输出子单元和第三电流输出子单元；
所述第一电流输出子单元包括第二场效应管和第一开关元件，所述第二电流输出子单元包括第三场效应管和第二开关元件；所述第三电流输出子单元包括第四场效应管和第三开关元件；
所述第二场效应管的第一端连接于所述第一开关元件的输入端，所述第三场效应管的第一端连接于所述第二开关元件的输入端，所述第四场效应管的第一端连接于所述第三开关元件的输入端；
所述第二场效应管、所述第三场效应管、所述第四场效应管的栅极均连接于所述第一场效应管的栅极，所述第二场效应管、所述第三场效应管和所述第四场效应管的第二端均连接于所述第一场效应管的第二端；
所述第一开关元件的控制端接入第一开关控制信号，所述第二开关元件的控制端接入第二开关控制信号，所述第三开关元件的控制端接入第三开关控制信号；所述第一开关元件、所述第二开关元件和所述第三开关元件的输出端均连接于所述调光模块。
可选的，在本申请的一些实施例中，所述调光模块包括：
第二电阻，所述第二电阻的第一端连接于所述电流输出调控单元的输出端；
开关单元，所述开关单元连接于所述第二电阻的第二端，所述开关单元用于控制所述调光模块的电流路径的导通和截断；
放大单元，所述放大单元用于放大所述电流镜模块输出的电流，形成驱动所述发光器件的所述驱动电流。
可选的，在本申请的一些实施例中，所述开关单元包括第四开关元件和第五开关元件；所述第四开关元件和所述第五开关元件的栅极均接入同一扫描信号，所述第四开关元件和所述第五开关元件的第一端均连接于所述第二电阻的第二端。
可选的，在本申请的一些实施例中，所述放大单元包括电容、第五场效应管和第六场效应管；所述电容的第一端分别连接于所述第四开关元件的第二端、所述第五场效应管的栅极和所述第六场效应管的栅极，所述电容的第二端分别连接于所述第五场效应管的第一端、所述第六场效应管的第一端和接地端；所述第五场效应管的第二端连接于所述第五开关元件的第二端；所述第六场效应管的第二端连接于所述发光器件的阳极；
所述发光器件的阴极接入阴极电压。
可选的，在本申请的一些实施例中，所述放大单元具有放大系数k，所述电流输出调控单元输出的总电流为I data，所述放大单元输出的所述驱动电流为k*I data，5≤k≤15。
有益效果
本申请实施例可根据控制信号控制电流镜模块可输出不同的电流；然后输出的电流在调光模块的放大下驱动发光器件；其中电流镜模块可输出不同的电流，使得发光器件具有不同的发光亮度，而调光模块的对电流的放大，以使发光器件正常工作，且可降低电流镜模块的负载。
 附图说明
为了更清楚地说明本申请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申请的一些实施例，对于本领域技术人员来讲，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。
图1是本申请实施例提供的驱动电路的结构示意图；
图2是本申请实施例提供的驱动电路的电路图；
图3是本申请实施例提供的面板的结构示意图。
 本发明的实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。此外，应当理解的是，此处所描述的具体实施方式仅用于说明和解释本申请，并不用于限制本申请。在本申请中，在未作相反说明的情况下，使用的方位词如“上”和“下”通常是指装置实际使用或工作状态下的上和下，具体为附图中的图面方向；而“内”和“外”则是针对装置的轮廓而言的。
本申请实施例提供一种驱动电路及面板，下文进行详细说明。
请参照图1和图2，本申请实施例提供一种驱动电路10，用于面板100。驱动电路10包括电流镜模块11、调光模块12和发光器件LD。
电流镜模块11用于根据不同的控制信号输出不同电流。
调光模块12连接于电流镜模块11。调光模块12用于放大所述电流形成驱动电流。
发光器件LD连接于调光模块12。发光器件LD根据不同的所述驱动电流，对应发出不同亮度的光。
本申请实施例可根据控制信号控制电流镜模块11可输出不同的电流；然后输出的电流在调光模块12的放大下驱动发光器件LD；其中电流镜模块11可输出不同的电流，使得发光器件LD具有不同的发光亮度，而调光模块12的对电流镜模块11输出电流的放大，以使发光器件LD正常工作，且可降低电流镜模块11的负载。
可选的，所述控制信号可以是视角模式信号、视频源信号、亮度信号中的一种，当然也可以是其他控制信号。
可选的，发光器件LD可以是有机发光二极管发光器件、Mini-LED发光器件和微型LED发光器件中的一种。本实施例以发光器件LD为Mini-LED发光器件为例进行说明，但不限于此。
可选的，电流镜模块11包括基准电流单元111和电流输出调控单元112。基准电流单元111用于提供基准电流。
电流输出调控单元112连接于基准电流单元111。电流输出调控单元112用于根据所述控制信号输出相应的总电流，电流输出调控单元112输出的总电流是基准电流的n倍，n≥1。
比如，发光器件LD的第一亮度对应于基准电流的1倍，发光器件LD的第二亮度对应于基准电流的2倍，发光器件LD的第三亮度对应于基准电流的3倍，也即发光器件LD的第n亮度对应基准电流的n倍；那么需要发光器件LD发出第n亮度，就控制电流输出调控单元112输出的总电流是基准电流的n倍即可。
当然，发光器件LD的发光亮度也可以对应基准电流的非整数倍，具体的对应关系可以根据实际情况进行调整，此处不再赘述。
可选的，所述电流输出调控单元112包括多个并联设置的电流输出子单元11a。所述电流输出调控单元112用于根据所述控制信号控制相应所述电流输出子单元11a的导通和关断，进而控制所述总电流的输出。每个所述电流输出子单元11a输出的电流是基准电流的m倍，m＞0。
也就是说，电流输出调控单元112输出的总电流为多个电流输出子单元11a实际输出的电流的总和。
可选的，比如本实施例需要实现发光器件LD可进行8种不同亮度的切换，那么可以设定3个电流输出子单元11a，第一电流输出子单元输出的电流是基准电流的1倍。第二电流输出子单元输出的电流是基准电流的2倍。第三电流输出子单元输出的电流是基准电流的4倍。因此电流输出调控单元112输出的总电流具有8种可选的输出总电流：0倍、1倍基准电流、2倍基准电流、1+2倍基准电流、4倍基准电流、2+3倍基准电流、2+4倍基准电流和1+2+4倍基准电流。
其中，8种不同的总电流对应发光器件LD的8种不同的发光亮度。因此如果本实施例需要发光器件LD具有更多不同的发光亮度，则可应当地增加电流输出子单元11a的数量即可；比如需要发光器件LD具有16种不同的发光亮度，则可以在上述例子的基础上增加并联一个8倍基准电流输出的电流输出子单元11a即可。
可以理解的是，电流输出子单元11a输出的电流也可以为基准电流的非整数倍，比如1/2、3/4、3/2、9/4和18/5等。
可选的，所述基准电流单元111包括第一电阻R1和第一场效应管M1。所述第一电阻R1的一端接入基准电压Vref，所述第一电阻R1的另一端连接于所述第一场效应管M1的第一端和栅极。所述第一场效应管M1的第二端接入控制电压V0。
每一所述电流输出子单元11a包括一场效应管M和一开关元件P。
在每一所述电流输出子单元11a中，所述场效应管M的栅极连接于所述第一场效应管M1的栅极，所述场效应管M的第一端连接于所述开关元件P的输入端，所述场效应管M的第二端连接于所述第一场效应管M1的第二端。所述开关元件P的控制端接入开关控制信号VS，所述开关元件P的输出端连接于所述调光模块12。
其中，当开关控制信号VS为高电平时，开关元件P打开；开关控制信号VS为低电平时，开关元件P关闭。也可以是当开关控制信号VS为低电平时，开关元件P打开；开关控制信号VS为高电平时，开关元件P关闭。
可选的，所述场效应管M可以是N型场效应管或P型场效应管。所述开关管元件P可以是场效应管或三极管。
可选的，每一电流输出子单元11a可以通过选择不同沟道宽长比的场效应管，确定电流输出子单元11a不同的输出电流。
可选的，电流输出调控单元112包括第一电流输出子单元11a1、第二电流输出子单元11a2和第三电流输出子单元11a3。
所述第一电流输出子单元11a1包括第二场效应管M2和第一开关元件P1。所述第二电流输出子单元11a2包括第三场效应管M3和第二开关元件P2。所述第三电流输出子单元11a3包括第四场效应管M4和第三开关元件P3。
所述第二场效应管M2的第一端连接于所述第一开关元件P1的输入端，所述第三场效应管M3的第一端连接于所述第二开关元件P2的输入端，所述第四场效应管M4的第一端连接于所述第三开关元件P3的输入端。
所述第二场效应管M2、所述第三场效应管M3、所述第四场效应管M4的栅极均连接于所述第一场效应管M1的栅极。所述第二场效应管M2、所述第三场效应管M3和所述第四场效应管M4的第二端均连接于所述第一场效应管M1的第二端。
所述第一开关元件P1的控制端接入第一开关控制信号VS1。第二开关元件P2的控制端接入第二开关控制信号VS2。所述第三开关元件P3的控制端接入第三开关控制信号VS3。所述第一开关元件P1、所述第二开关元件P2和所述第三开关元件P3的输出端均连接于所述调光模块12。
其中，本实施例以电流输出调控单元112包括3个电流输出子单元11a为例进行说明，但不限于此。
可选的，调光模块12包括第二电阻R2、开关单元121和放大单元122。
所述第二电阻R2的第一端连接于所述电流输出调控单元112的输出端。
所述开关单元121连接于所述第二电阻R2的第二端，所述开关单元121用于控制所述调光模块12的电流路径的导通和截断。
所述放大单元122用于放大所述电流镜模块11输出的电流，形成驱动所述发光器件LD的所述驱动电流。
其中，放大单元122的设置，可降低电流镜模块11的负载，也即电流镜模块11可以输出较小的电流，在放大单元122的作用，驱动发光器件LD正常工作。
可选的，开关单元121包括第四开关元件P4和第五开关元件P5。所述第四开关元件P4和所述第五开关元件P5的栅极均接入同一扫描信号SCAN。所述第四开关元件P4和所述第五开关元件P5的第一端均连接于所述第二电阻R2的第二端。
其中，本实施例采用同一扫描信号SCAN同时控制第四开关元件P4和所述第五开关元件P5同开或同关。
可选的，所述放大单元122包括电容C、第五场效应管M5和第六场效应管M6。所述电容C的第一端分别连接于所述第四开关元件P4的第二端、所述第五场效应管M5的栅极和所述第六场效应管M6的栅极。所述电容C的第二端分别连接于所述第五场效应管M5的第一端、所述第六场效应管M6的第一端和接地端。所述第五场效应管M5的第二端连接于所述第五开关元件P5的第二端。所述第六场效应管M6的第二端连接于所述发光器件LD的阳极；所述发光器件LD的阴极接入阴极电压VLED。
可选的，所述放大单元122具有放大系数k，所述电流输出调控单元112输出的总电流为I data，所述放大单元122输出的所述驱动电流为k*I data，5≤k≤15。
比如k可以是5、6、7、8、9、10、11、12、13、14和15。
其中，k值的大小通过第五场效应管M5和第六场效应管M6的沟道调制进行选择。也即选择不同的沟道宽长比的场效应管，会得到不同的k值。
请参照图3，本申请还提供一种面板100，所述面板100还包括发光基板FG和电连接所述发光基板FG的驱动芯片CH。所述电流镜模块11集成在所述驱动芯片CH上。所述调光模块12设置在所述显示基板FG上。
由于所述电流镜模块11集成在所述驱动芯片CH上，因此调光模块12的设置可以降低驱动芯片CH的负载。
可选的，所述面板100为显示面板或背光面板。
本申请实施例可根据控制信号控制电流镜模块11可输出不同的电流；然后输出的电流在调光模块12的放大下驱动发光器件；其中电流镜模块11可输出不同的电流，使得发光器件LD具有不同的发光亮度，而调光模块12的对电流镜模块11输出电流的放大，以使发光器件LD正常工作，且可降低驱动芯片CH的负载。
以上对本申请实施例所提供的一种面板的驱动电路进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (20)

  1. 一种驱动电路，用于面板，其包括：
    电流镜模块，所述电流镜模块用于根据不同的控制信号输出不同电流；
    调光模块，所述调光模块连接于所述电流镜模块，所述调光模块用于放大所述电流形成驱动电流；以及
    发光器件，所述发光器件连接于所述调光模块，所述发光器件根据不同的所述驱动电流，对应发出不同亮度的光。
  2. 根据权利要求1所述的驱动电路，其中，所述电流镜模块包括：
    基准电流单元，所述基准电流单元用于提供基准电流；
    电流输出调控单元，所述电流输出调控单元连接于所述基准电流单元，所述电流输出调控单元用于根据所述控制信号输出相应的总电流，所述电流输出调控单元输出的总电流是基准电流的n倍，n≥1。
  3. 根据权利要求2所述的驱动电路，其中，所述电流输出调控单元包括多个并联设置的电流输出子单元，所述电流输出调控单元用于根据所述控制信号控制相应所述电流输出子单元的导通和关断，进而控制所述总电流的输出；每个所述电流输出子单元输出的电流是基准电流的m倍，m＞0。
  4. 根据权利要求3所述的驱动电路，其中，所述基准电流单元包括第一电阻和第一场效应管，所述第一电阻的一端接入基准电压，所述第一电阻的另一端连接于所述第一场效应管的第一端和栅极，所述第一场效应管的第二端接入控制电压。
  5. 根据权利要求4所述的驱动电路，其中，每一所述电流输出子单元包括一场效应管和一开关元件；
    在每一所述电流输出子单元中，所述场效应管的栅极连接于所述第一场效应管的栅极，所述场效应管的第一端连接于所述开关元件的输入端，所述场效应管的第二端连接于所述第一场效应管的第二端；所述开关元件的控制端接入开关控制信号，所述开关元件的输出端连接于所述调光模块。
  6. 根据权利要求5所述的驱动电路，其中，所述电流输出调控单元包括第一电流输出子单元、第二电流输出子单元和第三电流输出子单元；
    所述第一电流输出子单元包括第二场效应管和第一开关元件，所述第二电流输出子单元包括第三场效应管和第二开关元件；所述第三电流输出子单元包括第四场效应管和第三开关元件；
    所述第二场效应管的第一端连接于所述第一开关元件的输入端，所述第三场效应管的第一端连接于所述第二开关元件的输入端，所述第四场效应管的第一端连接于所述第三开关元件的输入端；
    所述第二场效应管、所述第三场效应管、所述第四场效应管的栅极均连接于所述第一场效应管的栅极，所述第二场效应管、所述第三场效应管和所述第四场效应管的第二端均连接于所述第一场效应管的第二端；
    所述第一开关元件的控制端接入第一开关控制信号，所述第二开关元件的控制端接入第二开关控制信号，所述第三开关元件的控制端接入第三开关控制信号；所述第一开关元件、所述第二开关元件和所述第三开关元件的输出端均连接于所述调光模块。
  7. 根据权利要求1所述的驱动电路，其中，所述调光模块包括：
    第二电阻，所述第二电阻的第一端连接于所述电流输出调控单元的输出端；
    开关单元，所述开关单元连接于所述第二电阻的第二端，所述开关单元用于控制所述调光模块的电流路径的导通和截断；
    放大单元，所述放大单元用于放大所述电流镜模块输出的电流，形成驱动所述发光器件的所述驱动电流。
  8. 根据权利要求7所述的驱动电路，其中，所述开关单元包括第四开关元件和第五开关元件；所述第四开关元件和所述第五开关元件的栅极均接入同一扫描信号，所述第四开关元件和所述第五开关元件的第一端均连接于所述第二电阻的第二端。
  9. 根据权利要求8所述的驱动电路，其中，所述放大单元包括电容、第五场效应管和第六场效应管；所述电容的第一端分别连接于所述第四开关元件的第二端、所述第五场效应管的栅极和所述第六场效应管的栅极，所述电容的第二端分别连接于所述第五场效应管的第一端、所述第六场效应管的第一端和接地端；所述第五场效应管的第二端连接于所述第五开关元件的第二端；所述第六场效应管的第二端连接于所述发光器件的阳极；
    所述发光器件的阴极接入阴极电压。
  10. 根据权利要求7所述的驱动电路，其中，所述放大单元具有放大系数k，所述电流输出调控单元输出的总电流为I data，所述放大单元输出的所述驱动电流为k*I data，5≤k≤15。
  11. 一种面板，其中，所述面板包括驱动电路，所述驱动电路包括：
    电流镜模块，所述电流镜模块用于根据不同的控制信号输出不同电流；
    调光模块，所述调光模块连接于所述电流镜模块，所述调光模块用于放大所述电流形成驱动电流；以及
    发光器件，所述发光器件连接于所述调光模块，所述发光器件根据不同的所述驱动电流，对应发出不同亮度的光；
    所述面板还包括发光基板和电连接所述发光基板的驱动芯片，所述电流镜模块集成在所述驱动芯片上，所述调光模块设置在所述显示基板上。
  12. 根据权利要求11所述的面板，其中，所述面板为显示面板或背光面板。
  13. 根据权利要求11所述的面板，其中，所述电流镜模块包括：
    基准电流单元，所述基准电流单元用于提供基准电流；
    电流输出调控单元，所述电流输出调控单元连接于所述基准电流单元，所述电流输出调控单元用于根据所述控制信号输出相应的总电流，所述电流输出调控单元输出的总电流是基准电流的n倍，n≥1。
  14. 根据权利要求13所述的面板，其中，所述电流输出调控单元包括多个并联设置的电流输出子单元，所述电流输出调控单元用于根据所述控制信号控制相应所述电流输出子单元的导通和关断，进而控制所述总电流的输出；每个所述电流输出子单元输出的电流是基准电流的m倍，m＞0。
  15. 根据权利要求14所述的面板，其中，所述基准电流单元包括第一电阻和第一场效应管，所述第一电阻的一端接入基准电压，所述第一电阻的另一端连接于所述第一场效应管的第一端和栅极，所述第一场效应管的第二端接入控制电压。
  16. 根据权利要求15所述的面板，其中，每一所述电流输出子单元包括一场效应管和一开关元件；
    在每一所述电流输出子单元中，所述场效应管的栅极连接于所述第一场效应管的栅极，所述场效应管的第一端连接于所述开关元件的输入端，所述场效应管的第二端连接于所述第一场效应管的第二端；所述开关元件的控制端接入开关控制信号，所述开关元件的输出端连接于所述调光模块。
  17. 根据权利要求16所述的面板，其中，所述电流输出调控单元包括第一电流输出子单元、第二电流输出子单元和第三电流输出子单元；
    所述第一电流输出子单元包括第二场效应管和第一开关元件，所述第二电流输出子单元包括第三场效应管和第二开关元件；所述第三电流输出子单元包括第四场效应管和第三开关元件；
    所述第二场效应管的第一端连接于所述第一开关元件的输入端，所述第三场效应管的第一端连接于所述第二开关元件的输入端，所述第四场效应管的第一端连接于所述第三开关元件的输入端；
    所述第二场效应管、所述第三场效应管、所述第四场效应管的栅极均连接于所述第一场效应管的栅极，所述第二场效应管、所述第三场效应管和所述第四场效应管的第二端均连接于所述第一场效应管的第二端；
    所述第一开关元件的控制端接入第一开关控制信号，所述第二开关元件的控制端接入第二开关控制信号，所述第三开关元件的控制端接入第三开关控制信号；所述第一开关元件、所述第二开关元件和所述第三开关元件的输出端均连接于所述调光模块。
  18. 根据权利要求11所述的面板，其中，所述调光模块包括：
    第二电阻，所述第二电阻的第一端连接于所述电流输出调控单元的输出端；
    开关单元，所述开关单元连接于所述第二电阻的第二端，所述开关单元用于控制所述调光模块的电流路径的导通和截断；
    放大单元，所述放大单元用于放大所述电流镜模块输出的电流，形成驱动所述发光器件的所述驱动电流。
  19. 根据权利要求18所述的面板，其中，所述开关单元包括第四开关元件和第五开关元件；所述第四开关元件和所述第五开关元件的栅极均接入同一扫描信号，所述第四开关元件和所述第五开关元件的第一端均连接于所述第二电阻的第二端。
  20. 根据权利要求19所述的面板，其中，所述放大单元包括电容、第五场效应管和第六场效应管；所述电容的第一端分别连接于所述第四开关元件的第二端、所述第五场效应管的栅极和所述第六场效应管的栅极，所述电容的第二端分别连接于所述第五场效应管的第一端、所述第六场效应管的第一端和接地端；所述第五场效应管的第二端连接于所述第五开关元件的第二端；所述第六场效应管的第二端连接于所述发光器件的阳极；
    所述发光器件的阴极接入阴极电压。
PCT/CN2021/098047 2021-05-27 2021-06-03 驱动电路及面板 WO2022246885A1 (zh)

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