WO2022236889A1 - 背光驱动电路、显示面板、电子装置 - Google Patents

背光驱动电路、显示面板、电子装置 Download PDF

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Publication number
WO2022236889A1
WO2022236889A1 PCT/CN2021/097711 CN2021097711W WO2022236889A1 WO 2022236889 A1 WO2022236889 A1 WO 2022236889A1 CN 2021097711 W CN2021097711 W CN 2021097711W WO 2022236889 A1 WO2022236889 A1 WO 2022236889A1
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WIPO (PCT)
Prior art keywords
transistor
control unit
supply voltage
power supply
electrically connected
Prior art date
Application number
PCT/CN2021/097711
Other languages
English (en)
French (fr)
Inventor
刘金风
Original Assignee
Tcl华星光电技术有限公司
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Filing date
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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 US17/417,804 priority Critical patent/US20240013735A1/en
Publication of WO2022236889A1 publication Critical patent/WO2022236889A1/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]
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2300/00—Aspects of the constitution of display devices
    • G09G2300/08—Active matrix structure, i.e. with use of active elements, inclusive of non-linear two terminal elements, in the pixels together with light emitting or modulating elements
    • G09G2300/0809—Several active elements per pixel in active matrix panels
    • G09G2300/0842—Several active elements per pixel in active matrix panels forming a memory circuit, e.g. a dynamic memory with one capacitor
    • 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
    • G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • 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
    • G09G2320/0233—Improving the luminance or brightness uniformity across the screen
    • 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
    • G09G2320/04—Maintaining the quality of display appearance
    • G09G2320/043—Preventing or counteracting the effects of ageing
    • G09G2320/045—Compensation of drifts in the characteristics of light emitting or modulating elements

Definitions

  • the present application relates to the field of display technology, in particular to a backlight driving circuit, a display panel, and an electronic device.
  • AM-mini LED Active miniature Light Emitting Diode, active miniature light-emitting diode
  • TFT Thin Film Transistor
  • AM-mini LED active matrix LED
  • AM-mini The backlight of the LED still has the phenomenon of local dark areas.
  • the reason for this phenomenon is that the backlight of the AM-mini LED uses a 2T1C pixel backlight drive circuit, one of which is set in the control unit, and the other TFT is set in the light emitting diode.
  • the TFT located in the control unit is connected to the scan signal and the data signal at the same time.
  • the stability of the TFT is not good, and its threshold voltage will drift, so that after the next cycle is turned on, the data voltage passes through the After the TFT in the control unit, the voltage transmitted to the TFT in the light-emitting unit decreases, and the TFT installed in the light-emitting unit cannot be turned on, so that the light-emitting transistor in the light-emitting unit cannot be turned on, and the AM-mini LED cannot emit light. .
  • the present application provides a backlight drive circuit and its control method, a display panel, and an electronic device, which are used to solve the problem in the prior art that the TFT threshold voltage drift in the control unit of the backlight drive circuit causes AM-minileds to fail to emit light.
  • a backlight driving circuit provided by the present application includes: a light emitting unit, a scanning control unit and a light emitting control unit;
  • the light emitting unit is electrically connected between the first power supply voltage line and the second power supply voltage line;
  • the input terminal and the output terminal of the lighting control unit are connected in series in the loop formed by the lighting unit, the first power supply voltage line and the second power supply voltage line;
  • the scan control unit includes a first transistor and a second transistor, the input terminal and the output terminal of each of the first transistor and the second transistor are electrically connected to the data line and the control terminal of the light emission control unit Between, the control end of each of the first transistor and the second transistor is electrically connected to the corresponding scan line so that the first transistor and the second transistor are turned on alternately.
  • control end of the first transistor is electrically connected to the scan line of the current stage corresponding to the backlight driving circuit, and the control end of the second transistor is electrically connected to the next stage.
  • the light emission control unit includes a third transistor, the input terminal and the output terminal of the third transistor are the input terminal and the output terminal of the light emission control unit, and the first transistor The control terminal is the control terminal of the lighting control unit.
  • a capacitor is further included, the first plate of the capacitor is electrically connected to the input terminal and the output terminal of each of the first transistor and the second transistor and the One of the control terminals of the lighting control unit is electrically connected, and the second plate of the capacitor is electrically connected to the second power supply voltage line.
  • the first transistor and the second transistor are thin film transistors
  • the third transistor is a field effect transistor.
  • the first power supply voltage line is used to load the first power supply voltage
  • the second power supply voltage line is used to load the second power supply voltage
  • the second power supply voltage is lower than the first power supply voltage Voltage
  • the light emitting unit is a mini light emitting diode.
  • a display panel including:
  • a plurality of data lines and a plurality of scan lines are arranged to cross each other;
  • a backlight driving circuit comprising: a light emitting unit, a scanning control unit and a light emitting control unit;
  • the light emitting unit is electrically connected between the first power supply voltage line and the second power supply voltage line;
  • the input terminal and the output terminal of the lighting control unit are connected in series in the loop formed by the lighting unit, the first power supply voltage line and the second power supply voltage line;
  • the scan control unit includes a first transistor and a second transistor, the input terminal and the output terminal of each of the first transistor and the second transistor are electrically connected to the data line and the control terminal of the light emission control unit Between, the control end of each of the first transistor and the second transistor is electrically connected to the corresponding scan line so that the first transistor and the second transistor are turned on alternately.
  • control end of the first transistor is electrically connected to the corresponding scan line of the backlight driving circuit
  • control end of the second transistor is electrically connected to the backlight driving circuit.
  • the next stage of the circuit is the scan line.
  • the light emission control unit includes a third transistor, the input terminal and the output terminal of the third transistor are the input terminal and the output terminal of the light emission control unit, and the first transistor The control terminal is the control terminal of the lighting control unit.
  • a capacitor is further included, the first plate of the capacitor is electrically connected to the input terminal and the output terminal of each of the first transistor and the second transistor and the One of the control terminals of the lighting control unit is electrically connected, and the second plate of the capacitor is electrically connected to the second power supply voltage line.
  • the first transistor and the second transistor are thin film transistors
  • the third transistor is a field effect transistor.
  • the first power supply voltage line is used to load the first power supply voltage
  • the second power supply voltage line is used to load the second power supply voltage
  • the second power supply voltage is lower than the first power supply voltage Voltage
  • the light emitting unit is a mini light emitting diode.
  • the present application also provides an electronic device, including a display panel,
  • the display panel includes:
  • a plurality of data lines and a plurality of scan lines are arranged to cross each other;
  • a backlight driving circuit comprising: a light emitting unit, a scanning control unit and a light emitting control unit;
  • the light emitting unit is electrically connected between the first power supply voltage line and the second power supply voltage line;
  • the input terminal and the output terminal of the lighting control unit are connected in series in the loop formed by the lighting unit, the first power supply voltage line and the second power supply voltage line;
  • the scan control unit includes a first transistor and a second transistor, the input terminal and the output terminal of each of the first transistor and the second transistor are electrically connected to the data line and the control terminal of the light emission control unit Between, the control end of each of the first transistor and the second transistor is electrically connected to the corresponding scan line so that the first transistor and the second transistor are turned on alternately.
  • control end of the first transistor is electrically connected to the corresponding scan line of the backlight driving circuit
  • control end of the second transistor is electrically connected to the backlight driving circuit.
  • the next stage of the circuit is the scan line.
  • the light emission control unit includes a third transistor, the input terminal and the output terminal of the third transistor are the input terminal and the output terminal of the light emission control unit, and the first transistor The control terminal is the control terminal of the lighting control unit.
  • a capacitor is further included, the first plate of the capacitor is electrically connected to the input terminal and the output terminal of each of the first transistor and the second transistor and the One of the control terminals of the lighting control unit is electrically connected, and the second plate of the capacitor is electrically connected to the second power supply voltage line.
  • the first transistor and the second transistor are thin film transistors
  • the third transistor is a field effect transistor.
  • the first transistor is one of an N-type field effect transistor and a P-type field effect transistor
  • the second transistor is one of the N-type field effect transistor and the P-type field effect transistor. Another kind of .
  • the backlight driving circuit includes: a light emitting unit, a scanning control unit and a light emitting control unit; the light emitting unit is electrically connected between the first power supply voltage line and the second power supply voltage line; the input of the light emitting control unit end and output end are connected in series in the loop formed by the light emitting unit, the first power supply voltage line and the second power supply voltage line; the scan control unit includes a first transistor and a second transistor, and the first transistor The input terminal and the output terminal of each of the second transistors are electrically connected between the data line and the control terminal of the light emission control unit, and each of the first transistor and the second transistor The control terminal is electrically connected to the corresponding scanning line so that the first transistor and the second transistor are alternately turned on; the number of transistors in the scanning control unit is increased, so that each transistor drives the light emitting control unit to emit light alternately, improving stability of the backlight drive circuit and prolong its life.
  • FIG. 1 is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a first structure of a backlight driving circuit provided by an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a first scene of a backlight driving circuit provided by an embodiment of the present application.
  • FIG. 4 is a first timing diagram of the backlight driving circuit provided by the embodiment of the present application.
  • FIG. 5 is a schematic diagram of a fourth structure of a backlight driving circuit provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of a second scene of the backlight driving circuit provided by the embodiment of the present application.
  • FIG. 7 is a second timing diagram of the backlight driving circuit provided by the embodiment of the present application.
  • FIG. 8 is a schematic diagram of an eighth structure of the backlight driving circuit provided by the embodiment of the present application.
  • FIG. 9 is a schematic diagram of a third scene of the backlight driving circuit provided by the embodiment of the present application.
  • FIG. 10 is a third timing diagram of the backlight driving circuit provided by the embodiment of the present application.
  • first and second are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features.
  • a feature defined as “first” or “second” may explicitly or implicitly include one or more of said features.
  • “plurality” means two or more, unless otherwise specifically defined.
  • the present application provides a backlight driving circuit, a display panel, and an electronic device, specifically refer to FIG. 1 to FIG. 10 .
  • the existing AM-mini LED backlight still has the phenomenon of partial dark areas.
  • the reason for this phenomenon is that the AM-mini LED backlight uses a 2T1C pixel backlight drive circuit, and one of the TFTs is set in the control unit. Another TFT is set in the light-emitting unit.
  • the TFT in the control unit is connected to the scan signal and the data signal at the same time. After working at high temperature for a long time, the stability of this TFT is not good, and its threshold voltage will drift, making it turn on in the next cycle.
  • embodiments of the present application provide a backlight driving circuit and its control method, a display panel, and an electronic device to solve the above problems.
  • FIG. 1 it is a schematic structural diagram of a display panel provided by an embodiment of the present application.
  • the embodiment of the present application provides a backlight driving circuit.
  • the backlight driving circuit can be applied to a Mini-LED display panel or a Micro-LED display panel.
  • the display panel generally It is a cuboid, but not limited to a cuboid, and can also be in various other shapes, and the eight outer corners of the display panel are all rounded, so as to avoid inconvenience or even scratches for users during installation, transportation or use.
  • the first direction Z is a direction perpendicular to the plane where the display surface of the backlight driving circuit is located
  • the second direction X is located on the display surface of the backlight driving circuit and is parallel to the display surface of the backlight driving circuit.
  • the third direction Y is a direction perpendicular to the first direction Z and the second direction X at the same time.
  • the backlight driving circuit includes: a light emitting unit 3, a scanning control unit 1 and a light emitting control unit 2; the light emitting control unit 2 is electrically connected to the first power supply voltage line and the second between the power supply voltage lines; the input end and output end of the lighting control unit 2 are connected in series in the loop formed by the light emitting unit 3, the first power supply voltage line and the second power supply voltage line; the scan control The unit 1 includes a first transistor and a second transistor, the input terminal and the output terminal of each of the first transistor and the second transistor are electrically connected between the data line and the control terminal of the lighting control unit 2 A control terminal of each of the first transistor and the second transistor is electrically connected to a corresponding scan line so that the first transistor and the second transistor are turned on alternate
  • the first power supply voltage line is connected to the working voltage VDD, and the second power supply voltage line is connected to the common ground terminal voltage VSS, that is, the second power supply voltage line is grounded;
  • the scan control unit 1 inputs a scan control signal and a data control signal, the scanning control unit 1 is used to finally input the data control signal to the light emitting unit 3 under the action of the scanning control signal.
  • the light emission control unit 2 includes a transistor, the control terminal of the transistor is electrically connected to the output terminal of the scanning control unit 1, and the light emission control unit is controlled by turning on the scanning control unit 1 2 is turned on; the input end of the transistor is electrically connected to the output end of the light emitting unit 3, the input end of the light emitting unit 3 is electrically connected to the first power supply voltage line, and the first power supply voltage line is connected to Working voltage VDD, the output end of the transistor is electrically connected to the second power supply voltage line, and the second power supply voltage line is connected to the ground VSS, that is, the input end of the lighting control unit 2 is connected to the working voltage VDD, so The output end of the light emitting control unit 2 is connected to the ground; in other words, the input end and output end of the light emitting control unit 2 are connected in series to the light emitting unit 3, the first power supply voltage line and the second power supply voltage line.
  • a storage capacitor Cs is also provided between the scan control unit 1 and the second power supply voltage line ground VSS, the scan control unit 1 includes a first transistor and a second transistor, and the input terminal of the scan control unit 1 is electrically
  • the output terminal of the scanning control unit 1 is electrically connected to the light emission control unit 2, that is, the input terminal and output terminal of each of the first transistor and the second transistor are electrically connected.
  • the control terminal of each of the first transistor and the second transistor is electrically connected to the corresponding scanning line, it can be understood that, in In one embodiment, the control terminal of the first transistor and the control terminal of the second transistor are respectively electrically connected to different scanning stages to receive different scanning controls in different time periods.
  • the first transistor and the second transistor are transistors of the same type, since the first transistor and the second transistor are switching transistors here, which only function as switches, therefore, the first The transistor and the second transistor can be field effect transistors (FET, Field Effect Transistor) or thin film transistors, and the field effect transistor is an electronic component that controls current through an electric field effect.
  • FET Field Effect Transistor
  • the first transistor and the second transistor are connected to the same In the scanning stage, both the first transistor and the second transistor are field effect transistors, but the types of the first transistor and the second transistor are different, that is, the first transistor and the The second transistors are different ones of N-type field effect transistors and P-type field effect transistors; since the N-type field effect transistors are turned on at a high level and the P-type field effect transistors are turned on at a low level, Therefore, when the first transistor and the second transistor are respectively the N-type field effect transistor and the P-type field effect transistor, and both the first transistor and the second transistor are connected to the same scanning In the stage, the first transistor and the second transistor can still be alternately turned on, so as to improve the stability of the scanning control unit 1 .
  • the scan control unit 1 includes but not limited to two transistors, and the transistors are connected in parallel, that is, the input terminals of each transistor are electrically connected to the scan control unit 1, the output terminal of each transistor is electrically connected to the output terminal of the scanning control unit 1, that is, the input terminal of the light emission control unit 2, and the control terminals of different transistors are electrically connected to different
  • the scanning electrodes are connected to different scanning control signals, so that the transistors located in the scanning control unit 1 work alternately to drive the light emitting control unit 2 to emit light, avoiding the scanning control unit One of the transistors in 1 continues to work, and its threshold voltage drifts under the action of high temperature for a long time, thereby affecting the stability of the backlight drive circuit; therefore, the scanning control unit 1 simultaneously accesses the scanning control signal and The data control signal; since the scan control signal is input into the scan control unit 1 step by step, and the scan control signals of different scan levels are connected to different transistors, therefore, when the scan control signals of different scan levels After the scanning control signal is
  • the light emitting control unit 2 includes but not limited to one light emitting device, and the user can set the number of light emitting devices according to actual needs, which is different from the connection mode of the transistor in the scanning control unit 1 What is more, each of the light-emitting devices is connected in series.
  • the light emitting unit 3 is connected in series with the light emitting control unit 2, the output end of the light emitting unit 3 is electrically connected with the input end of the light emitting control unit 2, and the output end of the light emitting unit 3
  • the voltage is equal to the voltage of the input terminal of the lighting control unit 2
  • the input terminal of the lighting unit 3 is electrically connected to the first power supply voltage line, and connected to the working voltage VDD
  • the output terminal of the lighting control unit 2 is electrically connected sexually connected to the second power supply voltage line and connected to the ground terminal VSS.
  • control end of the first transistor is electrically connected to the scan line of the current stage corresponding to the backlight driving circuit
  • control end of the second transistor is electrically connected to the scan line of the next stage.
  • the first transistor and the second transistor are of the same type, and the control end of the first transistor is electrically connected to the backlight driver
  • the scanning line of the current stage corresponding to the circuit is used to receive the scanning signal of the current stage sent by the scanning line of the current stage, and the control terminal of the second transistor is electrically connected to the scanning line of the next stage of the backlight driving circuit.
  • the lighting control unit 2 includes a third transistor, the input terminal and the output terminal of the third transistor are the input terminal and the output terminal of the lighting control unit 2, and the control terminal of the first transistor is the The control terminal of the lighting control unit 2 .
  • the light emission control unit 2 includes but is not limited to one third transistor, and in one embodiment of the present application, the light emission control unit 2 only includes one third transistor, and the first The three transistors are the driving transistors, at this time, the input and output of the third transistor are the input and output of the light emitting control unit 2, and the control terminal of the first transistor is the light emitting control unit 2; furthermore, since the third transistor is a driving transistor, the third transistor may need to withstand a large current in the backlight driving circuit and work for a long time, because the thin film Transistors are generally used in microampere-level uA low-current scenarios, and the backlight drive circuit in the embodiments of the present application generally needs to import milliampere-level mA current scenarios.
  • the third transistor is a thin-film transistor, then in When working for a long time, its lifespan will be shortened, thereby affecting the lifespan of the backlight driving circuit. Therefore, the third transistor is preferably a field effect transistor to fully ensure the stability of the backlight driving circuit.
  • the backlight driving circuit further includes a capacitor, the first plate of the capacitor is electrically connected to the input terminal and the output terminal of each of the first transistor and the second transistor One of the control terminals of the lighting control unit 2 is electrically connected, and the second plate of the capacitor is electrically connected to the second power supply voltage line.
  • the backlight driving circuit further includes a capacitor, and the first plate of the capacitor is electrically connected to the input terminal and the input terminal of each of the first transistor and the second transistor.
  • One of the output terminals is electrically connected to the control terminal of the lighting control unit 2
  • the second plate of the capacitor is electrically connected to the second power supply voltage line, and the capacitor is used for Turning on the light emitting control unit 2 while charging, when the scanning control unit 1 is turned off, the capacitor discharges, and can continue to provide a turn-on voltage for the control terminal of the light emitting control unit 2, so that the light emitting Control unit 2 still works fine.
  • the first transistor and the second transistor are thin film transistors
  • the third transistor is a field effect transistor.
  • the first transistor and the second transistor are only used as switching transistors here, it is only necessary to turn on the scanning control unit 1 to connect the scanning control signal to the backlight driving circuit , therefore, the first transistor and the second transistor can be selected as thin film transistors, and the third transistor has a higher stability requirement because it plays the role of a driving transistor. Therefore, the third transistor is preferably the field effect transistor.
  • the first power supply voltage line is used for loading the first power supply voltage
  • the second power supply voltage line is used for loading the second power supply voltage
  • the second power supply voltage is lower than the first power supply voltage
  • the first power supply voltage line is connected to the working voltage VDD
  • the second power supply voltage line is connected to the ground terminal VSS
  • the voltage of the ground terminal VSS is 0, and the first power supply
  • the light-emitting unit 3 and the light-emitting control unit 2 are arranged between the voltage line and the second power supply voltage line; generally, since various light-emitting devices are arranged in the light-emitting unit 3, and the light-emitting control unit 2 itself has voltage, therefore, the light emitting unit 3 has a certain resistance, when the first power supply voltage passes through the light emitting unit 3 and the light emitting control unit 2, the first power supply voltage will decrease, and then become the second power supply voltage, therefore, the second power supply voltage is lower than the first power supply voltage; especially, when the light emitting unit 3 is not provided with the light emitting device, and the The light-emitting control unit 2 also has no resistance, that is, when the light-emitting unit 3 and the light-emitting control unit 2 are equivalent to a wire, the light
  • the first power supply voltage is equal to the current in the light-emitting unit 3 multiplied by the resistance in the light-emitting unit 3 plus the current in the light-emitting control unit 2 multiplied by the resistance in the light-emitting control unit 2 Add the second supply voltage.
  • the resistances in the light emitting unit 3 and the light emitting control unit 2 are both greater than 0, and the light emitting unit 3 and the light emitting control unit 2 are located on the same wire, therefore, the current flowing into the light emitting unit 3 and The currents flowing into the lighting control unit 2 are equal, therefore, the first power supply voltage is greater than the second power supply voltage, in other words, the second power supply voltage is lower than the first power supply voltage.
  • the light emitting unit 3 is a mini light emitting diode.
  • the light emitting unit 3 contains at least one light emitting device, and in the embodiment of the present application, the light emitting unit 3 is a mini light emitting diode.
  • the scan control unit 1 includes two transistors, a first transistor T1 and a second transistor T2, and the input terminal of the first transistor T1 is electrically equal to the input terminal of the second transistor T2. connected to the data control signal Data1, the control terminal of the first transistor T1 is electrically connected to the current scan control signal G1-1, and the control terminal of the second transistor T2 is electrically connected to the next scan control signal G1-2 ; That is, within the first time period, the first transistor T1 is turned on, the second transistor T2 is turned off, and the control terminal of the first transistor T1 is connected to the scanning through the scanning control signal G1-1 of the current stage.
  • the scanning control unit 1 so that the scanning control unit 1 transmits a signal to the light emission control unit 2; within a second time period, the second transistor T2 is turned on, the first transistor T1 is turned off, and the second transistor T1 is turned off.
  • the control terminal of transistor T2 is connected to the scanning control unit 1 through the next-level scanning control signal G1-2, so that the scanning control unit 1 transmits the signal to the light emission control unit 2; Under the action of different scanning levels, the two transistors in the unit 1 are connected to different scanning control signals in different time periods, so that the two transistors in the scanning control unit 1 work alternately Similarly, the scanning control signal G2-1 of the next next stage is electrically connected to the first transistor T1 of the next stage, and the scanning control signal G2-2 of the next next stage is electrically connected to the second transistor T2, between the scanning control signal G1-1 of the current level, the scanning control signal G1-2 of the next level, the scanning control signal G2-1 of the next level and the scanning control signal G2-2 of the next level , there is a certain delay
  • FIG. 3 is a schematic diagram of a first scene of an embodiment of the present application
  • FIG. 4 which is a schematic diagram of a first timing sequence of a backlight driving circuit provided by an embodiment of this application, corresponding to FIG. 3 .
  • the scanning control unit 1 includes three transistors, the first transistor T1, the second transistor T2 and the third transistor T3, refer to FIG. 5; the first transistor The input terminal of T1, the input terminal of the second transistor T2 and the input terminal of the third transistor T3 are all electrically connected to the data control signal, and the control terminal of the first transistor T1 is electrically connected to the previous scan Control signal G1-1, the control terminal of the second transistor T2 is electrically connected to the scan control signal G1-2 of the current stage; the control terminal of the third transistor T3 is electrically connected to the next scan control signal G1-3; in other words , in the first time period, the first transistor T1 is turned on, the second transistor T2 and the third transistor T3 are turned off, and the control terminal of the first transistor T1 passes the upper-level scan control signal G1-1 is connected to the scanning control unit 1, so that the light emitting control unit 2 emits light; in the second time period, the second transistor T2 is turned on, and the first transistor T1 and the third transistor T3 is turned off, the
  • FIG. 6 which is a schematic diagram of a second scene of the embodiment of the present application
  • FIG. 7 which is a schematic diagram of a second timing sequence of the backlight driving circuit provided by the embodiment of the present application, corresponding to FIG. 6 .
  • the scan control unit 1 includes four transistors, the first transistor T1, the second transistor T2, the third transistor T3 and the fourth transistor T4, refer to FIG. 8
  • the input end of the first transistor T1, the input end of the second transistor T2, the input end of the third transistor T3 and the input end of the fourth transistor T4 are all electrically connected to the data control signal, and the first transistor T1
  • the control terminal of the second transistor T2 is electrically connected to the scanning control signal G1-1 of the upper stage, the control terminal of the second transistor T2 is electrically connected to the scanning control signal G1-2 of the current stage;
  • the control terminal of the third transistor T3 is electrically connected to the lower Level-1 scanning control signal G1-3;
  • the control terminal of the fourth transistor T4 is electrically connected to the next-level scanning control signal G1-4; that is, in the first time period, the control terminal of the first transistor T1 passes
  • the upper-level scanning control signal G1-1 is connected to the scanning control unit 1, so that the light-emitting control unit 2 emits light; in the second
  • the above-mentioned scanning control signal so that the light-emitting control unit 2 emits light; similarly, the first transistor T1 in the next-level control unit is electrically connected to the next-level upper-level scanning control signal G2-1 , the second transistor T2 is electrically connected to the next-stage scan control signal G2-2 of the next stage, the third transistor T3 is electrically connected to the next-stage scan control signal G2-3 of the next stage, and the fourth transistor T3 is electrically connected to the next-stage scan control signal G2-3 of the next stage.
  • the transistor T4 is electrically connected to the next-level scanning control signal G2-4 of the next level; the upper-level scanning control signal G1-1, the current-level scanning control signal G1-2, and the lower-level scanning control signal signal G1-3, the next-level scan control signal G1-4, the lower-level upper-level scan control signal G2-1, the lower-level scan control signal G2-2, the Between the next-level scan control signal G2-3 of the next level and the next-level scan control signal G2-4 of the next level, there is a certain delay between every two adjacent scan control signals , and the specific delay time is set according to the user's needs.
  • FIG. 9 which is a schematic diagram of a third scene of the embodiment of the present application
  • FIG. 10 which is a schematic diagram of a third timing sequence of the backlight driving circuit provided by the embodiment of the present application, corresponding to FIG. 9 .
  • the embodiment of the present application provides a display panel, including: a first power supply voltage line and a second power supply voltage line; a plurality of data lines and a plurality of scanning lines, arranged to cross each other; a plurality of any one of the above The backlight drive circuit described above.
  • the display panel includes a first carrier and a second carrier
  • the first carrier includes a memory
  • the second carrier includes a processor
  • the first carrier can be used to store one or more control methods
  • the control method includes but not limited to the control method of the above-mentioned backlight driving circuit
  • the second carrier is used to execute each of the control methods stored in the first carrier, for example, the second carrier uses To implement the control method of the backlight driving circuit located in the first carrier:
  • Different scan signals are provided to the two scan lines electrically connected to the two control terminals of the first transistor and the second transistor, so that the first transistor and the second transistor are turned on alternately.
  • the embodiments of the present application further provide an electronic device, the electronic device includes the above-mentioned display panel.
  • the display panel includes the above-mentioned backlight driving circuit, the first carrier and the second carrier, and the second carrier can execute the control method stored in the first carrier, Furthermore, it is for the purpose of controlling the backlight driving circuit.
  • an embodiment of the present application provides a method for controlling a backlight driving circuit, which is used to control the backlight driving circuit described in any one of the above, including: electrically connecting the first transistor and the second The two scan lines of the two control terminals of the transistor provide different scan signals, so that the first transistor and the second transistor are turned on alternately.
  • the backlight driving circuit receives the data control signal and the scan control signal; controls the scan according to the scan control signal sent by the scan level or the scan level in different time periods.
  • the corresponding field effect transistors in the control unit 1 are turned on, so that the data control signal is input into the scanning control unit 1 and the light emission control unit 2 , so that the light emission control unit 2 works.
  • the control end of the transistor in the scan control unit 1 is electrically connected to one of the scan lines, and the input end of the transistor is electrically connected to one of the data lines, when the transistor is connected to the When the scan line inputs a high/low level, the transistor is turned on, and the data control signal is transmitted from the input terminal of the transistor to the light emission control unit 2 and then to the light emission unit 3, so that the light emission unit 3 glow.

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Abstract

一种背光驱动电路、显示面板、电子装置，包括：发光单元(3)、扫描控制单元(1)和发光控制单元(2)；增加了扫描控制单元(1)内的晶体管(T1,T2,T3,T4)的数量，以使得各晶体管(T1,T2,T3,T4)交替驱动发光控制单元(2)发光，提高背光驱动电路的稳定性并延长其寿命。

Description

背光驱动电路、显示面板、电子装置 技术领域
本申请涉及显示技术领域，尤其是涉及一种背光驱动电路、显示面板、电子装置。
 背景技术
AM-mini LED(Active miniature Light Emitting Diode，有源式迷你发光二极管)技术以薄膜晶体管（TFT，Thin Film Transistor）作为背光驱动电路，实现主动矩阵式（Active-matrix，AM-mini LED）驱动，将mini LED的潜力发挥到极致。而AM-mini LED在使用中也存在着一些问题。
例如，AM-mini LED的背光还存在着局部会出现暗区的现象，引发这一现象出现的原因在于AM-mini LED的背光采用2T1C像素背光驱动电路，其中一个TFT设置在控制单元内，另一个TFT设置在发光单元内，位于控制单元内的TFT同时连接扫描信号和数据信号，在高温长时间工作后，该TFT的稳定性不佳，其阈值电压会产生漂移，使得在下一周期开启后，数据电压经过所述控制单元内的TFT后传递给发光单元内的TFT的电压减小，无法打开设置在所述发光单元内的TFT，导致发光单元内的发光晶体管无法导通，进而使得AM-mini LED无法发光。
因此，现有的AM-mini LED技术中，还存在着背光驱动电路中控制单元内的TFT阈值电压漂移，导致AM-mini LED无法发光的问题，急需改进。
 技术问题
本申请提供一种背光驱动电路及其控制方法、显示面板、电子装置，用于解决现有技术中存在着背光驱动电路中控制单元内的TFT阈值电压漂移，导致AM-miniled无法发光的问题。
 技术解决方案
为解决上述问题，本申请提供的技术方案如下：
第一方面，本申请提供的一种背光驱动电路，包括：发光单元，扫描控制单元和发光控制单元；
所述发光单元电性连接于第一电源电压线和第二电源电压线之间；
所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
在一些实施例中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于下一级所述扫描线。
在一些实施例中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
在一些实施例中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
在一些实施例中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
在一些实施例中，所述第一电源电压线用于加载第一电源电压，所述第二电源电压线用于加载所述第二电源电压，所述第二电源电压小于所述第一电源电压。
在一些实施例中，所述发光单元为迷你发光二极管。
第二方面，本申请提供一种显示面板，包括：
第一电源电压线和第二电源电压线；
多条数据线和多条扫描线，相互交叉设置；以及
背光驱动电路，所述背光驱动电路包括：发光单元，扫描控制单元和发光控制单元；
所述发光单元电性连接于所述第一电源电压线和所述第二电源电压线之间；
所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
在一些实施例中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线。
在一些实施例中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
在一些实施例中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
在一些实施例中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
在一些实施例中，所述第一电源电压线用于加载第一电源电压，所述第二电源电压线用于加载所述第二电源电压，所述第二电源电压小于所述第一电源电压。
在一些实施例中，所述发光单元为迷你发光二极管。
第三方面，本申请还提供一种电子装置，包括显示面板，
所述显示面板包括：
第一电源电压线和第二电源电压线；
多条数据线和多条扫描线，相互交叉设置；以及
背光驱动电路，所述背光驱动电路包括：发光单元，扫描控制单元和发光控制单元；
所述发光单元电性连接于所述第一电源电压线和所述第二电源电压线之间；
所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
在一些实施例中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线。
在一些实施例中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
在一些实施例中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
在一些实施例中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
在一些实施例中，所述第一晶体管为N型场效应晶体管和P型场效应晶体管中的一种，所述第二晶体管为所述N型场效应晶体管和所述P型场效应晶体管中的另一种。
 有益效果
本申请提供的背光驱动电路，包括：发光单元、扫描控制单元和发光控制单元；所述发光单元电性连接于第一电源电压线和第二电源电压线之间；所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通；增加了扫描控制单元内的晶体管的数量，以使得各晶体管交替驱动发光控制单元发光，提高背光驱动电路的稳定性并延长其寿命。
 附图说明
图1为本申请实施例提供的显示面板的结构示意图。
图2为本申请实施例提供的背光驱动电路的第一结构示意图。
图3为本申请实施例提供的背光驱动电路的第一场景示意图。
图4为本申请实施例提供的背光驱动电路的第一时序示意图。
图5为本申请实施例提供的背光驱动电路的第四结构示意图。
图6为本申请实施例提供的背光驱动电路的第二场景示意图。
图7为本申请实施例提供的背光驱动电路的第二时序示意图。
图8为本申请实施例提供的背光驱动电路的第八结构示意图。
图9为本申请实施例提供的背光驱动电路的第三场景示意图。
图10为本申请实施例提供的背光驱动电路的第三时序示意图。
 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。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个所述特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
本申请提供一种背光驱动电路、显示面板、电子装置，具体参阅图1至图10。
现有的AM-mini LED的背光还存在着局部会出现暗区的现象，引发这一现象出现的原因在于AM-mini LED的背光采用2T1C像素背光驱动电路，其中一个TFT设置在控制单元内，另一个TFT设置在发光单元内，位于控制单元内的TFT同时连接扫描信号和数据信号，在高温长时间工作后，该TFT的稳定性不佳，其阈值电压会产生漂移，使得在下一周期开启后，数据电压经过所述控制单元内的TFT后传递给发光单元内的TFT的电压减小，无法打开设置在所述发光单元内的TFT，导致发光单元内的发光晶体管无法导通，进而使得AM-mini LED无法发光。因此，本申请的实施例提供一种背光驱动电路及其控制方法、显示面板、电子装置以解决上述问题。
参阅图1，为本申请实施例提供的显示面板的结构示意图。第一方面，本申请的实施例提供的一种背光驱动电路，首先，所述背光驱动电路可以应用于Mini-LED显示面板或是Micro-LED显示面板，参阅图1可知，所述显示面板一般为一长方体，但不限于长方体，也可以是其他各种形状，且所述显示面板的八个外角均为圆角结构，以避免用户在安装、搬运或是使用时不方便甚至刮伤手指。
其中，所述第一方向Z为垂直于所述背光驱动电路的显示面所在平面的方向，所述第二方向X为位于所述背光驱动电路的显示面，平行于所述背光驱动电路的显示面其中一边的方向，所述第三方向Y为同时垂直于所述第一方向Z和所述第二方向X的方向。
参阅图2，为本申请实施例提供的背光驱动电路的第一结构示意图。也是图1中所述显示面板沿A-A处的剖视图。从图2中，可以看出，所述背光驱动电路包括：发光单元3，扫描控制单元1和发光控制单元2；所述发光控制单元2电性连接于所述第一电源电压线和第二电源电压线之间；所述发光控制单元2的输入端和输出端串联于所述发光单元3、所述第一电源电压线和所述第二电源电压线组成的回路中；所述扫描控制单元1包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元2的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
其中，所述第一电源电压线接入工作电压VDD，所述第二电源电压线接入公共接地端电压VSS，即所述第二电源电压线接地；所述扫描控制单元1输入扫描控制信号和数据控制信号，所述扫描控制单元1用于在所述扫描控制信号的作用下将所述数据控制信号最终输入至所述发光单元3。
可以理解的是，所述发光控制单元2包括一晶体管，所述晶体管的控制端电性连接于所述扫描控制单元1的输出端，通过所述扫描控制单元1的开启控制所述发光控制单元2的开启；所述晶体管的输入端电性连接所述发光单元3的输出端，所述发光单元3的输入端电性连接所述第一电源电压线，所述第一电源电压线接入工作电压VDD，所述晶体管的输出端电性连接所述第二电源电压线，而所述第二电源电压线接地VSS连接，即所述发光控制单元2的输入端接入工作电压VDD，所述发光控制单元2的输出端接地连接；换言之，所述发光控制单元2的输入端和输出端串联于所述发光单元3、所述第一电源电压线和所述第二电源电压线组成的回路中。所述扫描控制单元1与所述第二电源电压线接地VSS之间还设置有存储电容Cs，所述扫描控制单元1包括第一晶体管和第二晶体管，所述扫描控制单元1的输入端电性连接其中一条数据线，所述扫描控制单元1的输出端电性连接所述发光控制单元2，即所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元2的控制端之间；所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线，可以理解的是，在一种实施例中，所述第一晶体管的所述控制端与所述第二晶体管的所述控制端分别电性连接于不同的所述扫描级以在不同的时间段内接收不同的扫描控制信号，所述第一晶体管与所述第二晶体管为同一类型的晶体管，由于所述第一晶体管与所述第二晶体管在此为开关晶体管，仅起到开关的作用，因此，所述第一晶体管与所述第二晶体管既可以为场效应晶体管（FET，Field Effect Transistor）也可以为薄膜晶体管，所述场效应晶体管是一种通过电场效应控制电流的电子元件。它依靠电场去控制导电沟道形状，因此能控制半导体材料中某种类型载流子的沟道的导电性；在另一种实施例中，所述第一晶体管与所述第二晶体管连接同一所述扫描级，但所述第一晶体管与所述第二晶体管均为所述场效应晶体管，但所述第一晶体管与所述第二晶体管的类型不同，即所述第一晶体管与所述第二晶体管分别为N型场效应晶体管和P型场效应晶体管中不同的一种；由于所述N型场效应晶体管高电平导通，而所述P型场效应晶体管低电平导通，因此，当所述第一晶体管与所述第二晶体管分别为所述N型场效应晶体管与所述P型场效应晶体管，且所述第一晶体管与所述第二晶体管均连接同一所述扫描级时，所述第一晶体管与所述第二晶体管仍可以保持交替导通，以改善所述扫描控制单元1的稳定性。
需要说明的是，所述扫描控制单元1内包括但不限于两个所述晶体管，而各所述晶体管之间并联，即每一所述晶体管的输入端均电性连接于所述扫描控制单元1的输入端，每一所述晶体管的输出端电性连接于所述扫描控制单元1的输出端，即所述发光控制单元2的输入端，不同的所述晶体管的控制端电性连接不同的扫描电极，以接入不同的扫描控制信号，进而使得位于所述扫描控制单元1内的各所述晶体管之间交替工作，以驱动所述发光控制单元2发光，避免了所述扫描控制单元1内的一个所述晶体管持续工作，长时间在高温作用下使得其阈值电压漂移，进而影响所述背光驱动电路的稳定性；因此，所述扫描控制单元1同时接入所述扫描控制信号和所述数据控制信号；由于所述扫描控制信号是逐级输入所述扫描控制单元1内的，而不同扫描级的所述扫描控制信号连接不同的所述晶体管，因此，当不同扫描级的所述扫描控制信号输入所述扫描控制单元1后，连接所述扫描级的所述扫描控制信号输入对应的所述晶体管，以使得所述晶体管导通所述扫描控制单元1，进而驱动所述发光控制单元2；即所述扫描控制单元1用于在所述扫描控制信号的作用下将所述数据控制信号输入至所述发光控制单元2。
同样的，所述发光控制单元2内包括但不限于一个所述发光器件，用户可以根据实际需求设定所述发光器件的数量，与所述扫描控制单元1内的所述晶体管的连接方式不同的是，各所述发光器件之间是串联的。
可以理解的是，所述发光单元3与所述发光控制单元2串联，所述发光单元3的输出端与所述发光控制单元2的输入端电性连接，且所述发光单元3的输出端的电压等于所述发光控制单元2的输入端的电压，所述发光单元3的输入端电性连接所述第一电源电压线，接入所述工作电压VDD，所述发光控制单元2的输出端电性连接所述第二电源电压线，接入接地端VSS。
进一步地，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于下一级所述扫描线。
可以理解的是，在本申请的一种实施例中，所述第一晶体管与所述第二晶体管为同一类型的晶体管，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级所述扫描线，以接收本级所述扫描线发送的本级扫描信号，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线，以接收下一级所述扫描线发送的下一级扫描信号，由于所述本级扫描信号与所述下一级扫描信号总是交替开启的，因此，所述第一晶体管与所述第二晶体管总是交替工作，进而以改善所述扫描控制单元1甚至所述背光驱动电路的稳定性。
进一步地，所述发光控制单元2包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元2的输入端和输出端，所述第一晶体管的控制端为所述发光控制单元2的所述控制端。
可以理解的是，所述发光控制单元2包括但不限于一个所述第三晶体管，在本申请的一种实施例中，所述发光控制单元2仅包括一个所述第三晶体管，所述第三晶体管即为驱动晶体管，此时，所述第三晶体管的输入端和输出端即为所述发光控制单元2的输入端和输出端，所述第一晶体管的控制端为所述发光控制单元2的所述控制端；进一步地，由于所述第三晶体管为驱动晶体管，因此，所述第三晶体管可能需要承受所述背光驱动电路内较大的电流，且长时间工作，由于所述薄膜晶体管一般应用在微安级uA的小电流场景下，而本申请的实施例中的所述背光驱动电路一般需要导入毫安级mA的电流场景，若所述第三晶体管选用薄膜晶体管，则在长时间工作下，其寿命会变短，进而影响所述背光驱动电路的寿命，因此，所述第三晶体管优选场效应晶体管，以充分保证所述背光驱动电路的稳定性。
进一步地，所述背光驱动电路还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元2的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
可以理解的是，所述背光驱动电路还包括电容，所述电容的所述第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元2的所述控制端电性连接的一个，所述电容的所述第二极板电性连接于所述第二电源电压线，所述电容用于在导通所述发光控制单元2的同时充电，当所述扫描控制单元1关闭时，所述电容放电，可以为所述发光控制单元2的所述控制端继续提供开启电压，以使得所述发光控制单元2仍然可以正常工作。
进一步地，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
可以理解的是，由于所述第一晶体管与所述第二晶体管在此仅作为开关晶体管，只需要导通所述扫描控制单元1，将所述扫描控制信号接入至所述背光驱动电路内，因此，所述第一晶体管与所述第二晶体管选用薄膜晶体管即可，而所述第三晶体管由于起到驱动晶体管的作用，其稳定性要求更高，因此，所述第三晶体管优选为所述场效应晶体管。
进一步地，所述第一电源电压线用于加载第一电源电压，所述第二电源电压线用于加载所述第二电源电压，所述第二电源电压小于所述第一电源电压。
可以理解的是，所述第一电源电压线接入所述工作电压VDD，所述第二电源电压线接入所述接地端VSS，所述接地端VSS的电压为0，所述第一电源电压线与所述第二电源电压线之间设置有所述发光单元3和所述发光控制单元2；一般地，由于所述发光单元3内设置有各种发光器件，且所述发光控制单元2本身是带有电压的，因此，所述发光单元3是存在一定的电阻的，当所述第一电源电压经过所述发光单元3和所述发光控制单元2之后，所述第一电源电压会减小，进而变为所述第二电源电压，因此，所述第二电源电压小于所述第一电源电压；特殊的，当所述发光单元3内未设置所述发光器件，且所述发光控制单元2也无电阻，即所述发光单元3和所述发光控制单元2相当于一根导线时，所述发光单元3可以视作无电阻，即此时所述第二电源电压等于所述第一电源电压，由于每根导线自身也会存在一定的电阻，即线电阻，因此所述发光单元3和所述发光控制单元2内一定存在电阻，所述第二电源电压始终是小于所述第一电源电压的。进一步地，所述第一电源电压等于所述发光单元3内的电流乘以所述发光单元3内的电阻加上所述发光控制单元2内的电流乘以所述发光控制单元2内的电阻加上所述第二电源电压。
所述发光单元3与所述发光控制单元2内的电阻均大于0，而所述发光单元3与所述发光控制单元2位于同一根导线上，因此，流入所述发光单元3内的电流与流入所述发光控制单元2内的电流相等，因此，所述第一电源电压大于所述第二电源电压，换言之，所述第二电源电压小于所述第一电源电压。
进一步地，所述发光单元3为迷你发光二极管。
可以理解的是，所述发光单元3内包含至少一个所述发光器件，在本申请实施例中，所述发光单元3为迷你发光二极管。
在一种实施例中，所述扫描控制单元1包括两所述晶体管，第一晶体管T1和第二晶体管T2，所述第一晶体管T1的输入端与所述第二晶体管T2输入端均电性连接所述数据控制信号Data1，所述第一晶体管T1的控制端电性连接本级扫描控制信号G1-1，所述第二晶体管T2的控制端电性连接下一级扫描控制信号G1-2；即在第一时间段内，所述第一晶体管T1导通，所述第二晶体管T2关闭，所述第一晶体管T1的控制端通过所述本级扫描控制信号G1-1连通所述扫描控制单元1，使得所述扫描控制单元1将信号传递至所述发光控制单元2；在第二时间段内，所述第二晶体管T2导通，所述第一晶体管T1关闭，所述第二晶体管T2的控制端通过所述下一级扫描控制信号G1-2连通所述扫描控制单元1，使得所述扫描控制单元1将信号传递至所述发光控制单元2；即此时所述扫描控制单元1内的两所述晶体管在不同的扫描级的作用下，在不同的时间段内接入不同的所述扫描控制信号，进而使得位于所述扫描控制单元1内的两所述晶体管交替工作，同样的，下下一级的扫描控制信号G2-1电性连接下一级的所述第一晶体管T1，下下下一级扫描控制信号G2-2电性连接所述第二晶体管T2，所述本级扫描控制信号G1-1，所述下一级扫描控制信号G1-2，下下一级的扫描控制信号G2-1以及所述下下下一级扫描控制信号G2-2之间，每相邻的两扫描控制信号之间均存在一定的延时，具体延时的时间根据用户的需求进行设置。具体地，详见图3为本申请的实施例的第一场景示意图；图4，为本申请实施例提供的背光驱动电路的第一时序示意图，对应于图3。
在一种实施例中，所述扫描控制单元1内包括三所述晶体管，所述第一晶体管T1、所述第二晶体管T2和所述第三晶体管T3，参阅图5；所述第一晶体管T1的输入端、所述第二晶体管T2的输入端和所述第三晶体管T3的输入端均电性连接所述数据控制信号，所述第一晶体管T1的控制端电性连接上一级扫描控制信号G1-1，所述第二晶体管T2的控制端电性连接本级扫描控制信号G1-2；所述第三晶体管T3的控制端电性连接下一级扫描控制信号G1-3；换言之，在第一时间段内，所述第一晶体管T1导通，所述第二晶体管T2和所述第三晶体管T3关闭，所述第一晶体管T1的控制端通过所述上一级扫描控制信号G1-1连通所述扫描控制单元1，以使得所述发光控制单元2发光；在第二时间段内，所述第二晶体管T2导通，所述第一晶体管T1和所述第三晶体管T3关闭，所述第二晶体管T2的控制端通过所述本级扫描控制信号G1-2连通所述扫描控制信号，以使得所述发光控制单元2发光；在第三时间段内，所述第三晶体管T3导通，所述第二晶体管T2和所述第一晶体管T1关闭，所述第三晶体管T3的控制端通过所述下一级扫描控制信号G1-3连通所述扫描控制信号，以使得所述发光控制单元2发光；同样的，下一级的所述第二晶体管T1电性连接下一级的上一级扫描控制信号G2-1，下一级的所述第二晶体管T2电性连接下一级的本级扫描控制信号G2-2，下一级的所述第三晶体管T3电性连接下一级的下一级扫描控制信号G2-3；所述上一级扫描控制信号G1-1，所述本级扫描控制信号G1-2，所述下一级扫描控制信号G1-3，所述下一级的上一级扫描控制信号G2-1，所述下一级的本级扫描控制信号G2-2以及所述下一级的下一级扫描控制信号G2-3之间，每相邻的两扫描控制信号之间均存在一定的延时，具体延时的时间根据用户的需求进行设置。具体地，详见图6为本申请的实施例的第二场景示意图；图7，为本申请实施例提供的背光驱动电路的第二时序示意图，对应于图6。
在一种实施例中，所述扫描控制单元1包括四所述晶体管，所述第一晶体管T1、所述第二晶体管T2、所述第三晶体管T3以及所述第四晶体管T4，参阅图8；所述第一晶体管T1的输入端、第二晶体管T2的输入端、第三晶体管T3的输入端以及第四晶体管T4的输入端均电性连接所述数据控制信号，所述第一晶体管T1的控制端电性连接上一级扫描控制信号G1-1，所述第二晶体管T2的控制端电性连接本级扫描控制信号G1-2；所述第三晶体管T3的控制端电性连接下一级扫描控制信号G1-3；所述第四晶体管T4的控制端电性连接下下一级扫描控制信号G1-4；即在第一时间段内，所述第一晶体管T1的控制端通过所述上一级扫描控制信号G1-1连通所述扫描控制单元1，以使得所述发光控制单元2发光；在第二时间段内，所述第二晶体管T2的控制端通过所述本级扫描控制信号G1-2连通所述扫描控制单元1，以使得所述发光控制单元2发光；在第三时间段内，所述第三晶体管T3的控制端通过所述下一级扫描控制信号G1-3连通所述扫描控制信号，以使得所述发光控制单元2发光；在第四时间段内，所述第四晶体管T4的控制端通过所述下下一级扫描控制信号G1-4连通所述扫描控制信号，以使得所述发光控制单元2发光；同样的，下一级的所述控制单元内的所述第一晶体管T1电性连接下一级的上一级扫描控制信号G2-1，所述第二晶体管T2电性连接下一级的本级扫描控制信号G2-2，所述第三晶体管T3电性连接下一级的下一级扫描控制信号G2-3，所述第四晶体管T4电性连接下一级的下下一级扫描控制信号G2-4；所述上一级扫描控制信号G1-1，所述本级扫描控制信号G1-2，所述下一级扫描控制信号G1-3，所述下下一级扫描控制信号G1-4，所述下一级的上一级扫描控制信号G2-1，所述下一级的本级扫描控制信号G2-2，所述下一级的下一级扫描控制信号G2-3以及所述下一级的下下一级扫描控制信号G2-4之间，每相邻的两扫描控制信号之间均存在一定的延时，具体延时的时间根据用户的需求进行设置。具体地，详见图9为本申请的实施例的第三场景示意图；图10，为本申请实施例提供的背光驱动电路的第三时序示意图，对应于图9。
第二方面，本申请的实施例提供一种显示面板，包括：第一电源电压线和第二电源电压线；多条数据线和多条扫描线，相互交叉设置；多个上述任一项所述的背光驱动电路。
进一步地，所述显示面板内包括第一载体和第二载体，所述第一载体包括存储器，所述第二载体包括处理器，所述第一载体可以用于存储一个或多个控制方法，所述控制方法包括但不限于上述所述的背光驱动电路的控制方法，所述第二载体用于执行存储与所述第一载体内的各所述控制方法，例如，所述第二载体用于执行位于所述第一载体内的背光驱动电路的控制方法：
向电性连接于所述第一晶体管和所述第二晶体管的两所述控制端的两所述扫描线提供不同的扫描信号，使得所述第一晶体管和所述第二晶体管交替导通。
第三方面，本申请的实施例还提供一种电子装置，所述电子装置包括上述所述的显示面板。
可以理解的是，所述显示面板包含上述所述的背光驱动电路，所述第一载体以及所述第二载体，可以通过所述第二载体执行存储在所述第一载体内的控制方法，进而以控制所述背光驱动电路的目的。
第四方面，本申请实施例提供一种背光驱动电路的控制方法，用于控制如上述任一项所述的背光驱动电路，包括：向电性连接于所述第一晶体管和所述第二晶体管的两所述控制端的两所述扫描线提供不同的扫描信号，使得所述第一晶体管和所述第二晶体管交替导通。
具体地，所述背光驱动电路接收所述数据控制信号和所述扫描控制信号；根据不同的所述扫描级或是不同时间段内的所述扫描级发出的所述扫描控制信号控制所述扫描控制单元1内相应的所述场效应晶体管导通，以使得所述数据控制信号输入至所述扫描控制单元1与所述发光控制单元2内，进而使得所述发光控制单元2工作。
进一步地，由于所述扫描控制单元1内的所述晶体管的控制端电性连接其中一扫描线，所述晶体管的输入端电性连接其中一所述数据线，当连接所述晶体管的所述扫描线输入高/低电平时，所述晶体管导通，所述数据控制信号从所述晶体管的输入端传递至所述发光控制单元2进而传输至所述发光单元3，以使得所述发光单元3发光。
以上对本申请实施例所提供的一种背光驱动电路、显示面板、电子装置进行了详细介绍，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技术方案及其核心思想；本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例的技术方案的范围。

Claims (20)

  1. 一种背光驱动电路，其中，包括：发光单元，扫描控制单元和发光控制单元；
    所述发光单元电性连接于第一电源电压线和第二电源电压线之间；
    所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
    所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
  2. 根据权利要求1所述的背光驱动电路，其中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线。
  3. 根据权利要求2所述的背光驱动电路，其中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
  4. 根据权利要求3所述的背光驱动电路，其中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
  5. 根据权利要求3所述的背光驱动电路，其中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
  6. 根据权利要求1所述的背光驱动电路，其中，所述第一电源电压线用于加载第一电源电压，所述第二电源电压线用于加载所述第二电源电压，所述第二电源电压小于所述第一电源电压。
  7. 根据权利要求1所述的背光驱动电路，其中，所述发光单元为迷你发光二极管。
  8. 一种显示面板，其中，包括：
    第一电源电压线和第二电源电压线；
    多条数据线和多条扫描线，相互交叉设置；以及
    背光驱动电路，所述背光驱动电路包括：发光单元，扫描控制单元和发光控制单元；
    所述发光单元电性连接于所述第一电源电压线和所述第二电源电压线之间；
    所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
    所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
  9. 根据权利要求8所述的显示面板，其中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线。
  10. 根据权利要求9所述的显示面板，其中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
  11. 根据权利要求10所述的显示面板，其中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
  12. 根据权利要求11所述的显示面板，其中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
  13. 根据权利要求8所述的显示面板，其中，所述第一电源电压线用于加载第一电源电压，所述第二电源电压线用于加载所述第二电源电压，所述第二电源电压小于所述第一电源电压。
  14. 根据权利要求8所述的显示面板，其中，所述发光单元为迷你发光二极管。
  15. 一种电子装置，其中，包括显示面板，所述显示面板包括：
    第一电源电压线和第二电源电压线；
    多条数据线和多条扫描线，相互交叉设置；以及
    背光驱动电路，所述背光驱动电路包括：发光单元，扫描控制单元和发光控制单元；
    所述发光单元电性连接于所述第一电源电压线和所述第二电源电压线之间；
    所述发光控制单元的输入端和输出端串联于所述发光单元、所述第一电源电压线和所述第二电源电压线组成的回路中；
    所述扫描控制单元包括第一晶体管和第二晶体管，所述第一晶体管和所述第二晶体管中的每个的输入端和输出端电性连接于数据线和所述发光控制单元的控制端之间，所述第一晶体管和所述第二晶体管中的每个的控制端电性连接于对应的扫描线以使得所述第一晶体管和所述第二晶体管交替导通。
  16. 根据权利要求15所述的电子装置，其中，所述第一晶体管的所述控制端电性连接于所述背光驱动电路对应的本级扫描线，所述第二晶体管的所述控制端电性连接于所述背光驱动电路的下一级所述扫描线。
  17. 根据权利要求16所述的电子装置，其中，所述发光控制单元包括第三晶体管，所述第三晶体管的输入端和输出端为所述发光控制单元的所述输入端和所述输出端，所述第一晶体管的控制端为所述发光控制单元的所述控制端。
  18. 根据权利要求17所述的电子装置，其中，还包括电容，所述电容的第一极板电性连接于所述第一晶体管和所述第二晶体管中的每个的所述输入端和所述输出端中与所述发光控制单元的所述控制端电性连接的一个，所述电容的第二极板电性连接于所述第二电源电压线。
  19. 根据权利要求17所述的电子装置，其中，所述第一晶体管和所述第二晶体管为薄膜晶体管，所述第三晶体管为场效应晶体管。
  20. 根据权利要求17所述的电子装置，其中，所述第一晶体管为N型场效应晶体管和P型场效应晶体管中的一种，所述第二晶体管为所述N型场效应晶体管和所述P型场效应晶体管中的另一种。
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