WO2024254910A1 - 发光基板及驱动方法 - Google Patents

发光基板及驱动方法 Download PDF

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Publication number
WO2024254910A1
WO2024254910A1 PCT/CN2023/104421 CN2023104421W WO2024254910A1 WO 2024254910 A1 WO2024254910 A1 WO 2024254910A1 CN 2023104421 W CN2023104421 W CN 2023104421W WO 2024254910 A1 WO2024254910 A1 WO 2024254910A1
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WIPO (PCT)
Prior art keywords
light
emitting
power supply
electrically connected
emitting module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2023/104421
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English (en)
French (fr)
Inventor
刘金风
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TCL China Star Optoelectronics Technology Co Ltd
Original Assignee
TCL China Star Optoelectronics Technology Co Ltd
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 China Star Optoelectronics Technology Co Ltd filed Critical TCL China Star Optoelectronics Technology Co Ltd
Priority to DE112023000025.5T priority Critical patent/DE112023000025B4/de
Priority to EP23741965.0A priority patent/EP4730918A1/en
Priority to JP2023548349A priority patent/JP2025524309A/ja
Publication of WO2024254910A1 publication Critical patent/WO2024254910A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/395—Linear regulators
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/028—Generation of voltages supplied to electrode drivers in a matrix display other than LCD

Definitions

  • the present application relates to the field of display technology, and in particular to a light-emitting substrate and a driving method.
  • Micro LED display devices and sub-millimeter LED display devices include thousands of LEDs.
  • an AC-DC power module and a DC-DC power module are provided in the existing light-emitting substrate, wherein the AC-DC power module is used to convert the AC voltage provided by an external power source into a DC voltage, and the DC-DC power module is used to convert the DC voltage provided by the AC-DC power module into a driving voltage for driving the LEDs to emit light.
  • a plurality of DC-DC power modules are arranged to respectively provide driving voltages to the light-emitting diodes in corresponding areas, which makes the circuit structure of the existing light-emitting substrate complex and the cost too high.
  • the present application provides a light-emitting substrate and a driving method, which can simplify the circuit structure and reduce the cost.
  • an embodiment of the present application provides a light-emitting substrate, comprising: a power supply module and a plurality of light-emitting modules, the power supply module comprising a power supply unit, a power supply line and a feedback line, the power supply unit comprising a voltage output end and a signal receiving end, the power supply line and the feedback line each having a first end and a plurality of second ends, the first end of the power supply line being electrically connected to the voltage output end, the first end of the feedback line being electrically connected to the signal receiving end, the power supply module being used to control the voltage output end to output a power supply voltage based on a feedback signal received by the signal receiving end; the plurality of light-emitting modules being electrically connected to the second ends of the power supply line, respectively, and the plurality of light-emitting modules being electrically connected to the second ends of the feedback line, respectively, the light-emitting modules being used to emit light under the drive of the power supply voltage, and outputting the feedback signal to the
  • an embodiment of the present application also provides a driving method, including: obtaining an initial power supply voltage value provided by a power supply module and a driving voltage value required for the light-emitting module to emit light; calculating a voltage difference between the initial power supply voltage value and the driving voltage value; outputting a feedback signal based on the voltage difference; and adjusting the initial power supply voltage value to a target power supply voltage value based on the feedback signal.
  • the present application provides a light-emitting substrate and a driving method
  • the light-emitting substrate comprises: a power module and a plurality of light-emitting modules
  • the power module comprises a power supply unit, a power line and a feedback line
  • the power supply unit comprises a voltage output end and a signal receiving end
  • the power line and the feedback line each have a first end and a plurality of second ends
  • the first end of the power line is electrically connected to the voltage output end
  • the first end of the feedback line is electrically connected to the signal receiving end
  • the power module is used to control the voltage output end to output a power supply voltage based on a feedback signal received by the signal receiving end
  • the plurality of light-emitting modules are electrically connected to the second end of the power line, respectively, and the plurality of light-emitting modules are electrically connected to the second end of the feedback line, respectively, the light-emitting modules are used to emit light under the drive of the power supply voltage, and output the feedback signal
  • the light-emitting substrate provides a plurality of second ends for the power line and the feedback line in the power module, and electrically connects the plurality of light-emitting modules to the plurality of second ends of the power line and the plurality of second ends of the feedback line, that is, by providing a power module, the power supply voltage is provided to all the light-emitting modules, the number of power modules used is reduced, the circuit structure is simplified and the cost is greatly reduced, which is conducive to improving the competitiveness of the product.
  • FIG1 is a block diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG2 is a first schematic diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG3 is a second schematic diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG4 is a third schematic diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG5 is a fourth schematic diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG6 is a fifth schematic diagram of a light-emitting substrate provided in an embodiment of the present application.
  • FIG7 is a flow chart of a driving method provided in an embodiment of the present application.
  • FIG. 8 is a flow chart of step S30 in FIG. 7 .
  • an embodiment of the present application provides a light-emitting substrate 100, comprising: a power module 10 and a plurality of light-emitting modules 20, wherein the power module 10 comprises a power supply unit 11, a power line 12 and a feedback line 13.
  • the power supply unit 11 comprises a voltage output terminal 111 and a signal receiving terminal 112.
  • the power line 12 and the feedback line 13 each have a first end and a plurality of second ends, wherein the first end 121 of the power line 12 is electrically connected to the voltage output terminal 111, and the first end 131 of the feedback line 13 is electrically connected to the signal receiving terminal 112.
  • the power module 10 is used to control the voltage output terminal 111 to output a power supply voltage based on a feedback signal received by the signal receiving terminal 112.
  • the plurality of light-emitting modules 20 are electrically connected to the second end 122 of the power line 12, respectively, and the plurality of light-emitting modules 20 are electrically connected to the second end 132 of the feedback line 13, respectively.
  • the light-emitting module 20 is used to emit light under the drive of the power supply voltage, and output a feedback signal to the power supply unit 11 based on the power supply voltage.
  • the multiple light-emitting modules 20 are respectively electrically connected to the multiple second ends 122 of the power line 12 and the multiple second ends of the feedback line 13, that is, by providing a power module 10, it is possible to provide power supply voltage to all the light-emitting modules 20, reduce the number of power modules 10 used, simplify the circuit structure and significantly reduce the cost, which is conducive to improving the competitiveness of the product.
  • the light-emitting substrate 100 further comprises a substrate, and at least part of the light-emitting module 20 and the power module 10 are arranged on the substrate.
  • the light-emitting substrate can be applied to any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, etc.
  • the power supply unit 11 includes an AC-DC converter, and the AC-DC converter includes a voltage input terminal, a voltage output terminal, and a signal receiving terminal.
  • the voltage input terminal is used to receive an AC voltage
  • the signal receiving terminal is used to receive a feedback signal
  • the voltage output terminal is used to control the output of the power supply voltage based on the feedback signal.
  • the power supply unit 11 is connected to an AC voltage provided by an external power supply, such as a household 220-volt AC voltage, and converts the AC voltage into a DC voltage for driving the light-emitting module 20 to emit light.
  • the power supply unit 11 dynamically adjusts the magnitude of the power supply voltage according to the feedback signal.
  • the light emitting module 20 includes a light emitting unit 21 and a driver chip 22, wherein the driver chip 22 includes a first pin 221 and a second pin 222, wherein the anode A of the light emitting unit 21 is electrically connected to the second end 122 of the power line 12, the cathode C of the light emitting unit 21 is electrically connected to the first pin 221 of the driver chip 22, and the second pin 222 of the driver chip 22 is electrically connected to the second end 132 of the feedback line 13.
  • the light emitting unit 21 may be a light emitting diode, or a light emitting diode string formed by connecting a plurality of light emitting diodes in series in sequence.
  • Each driver chip 22 is electrically connected to at least one light emitting diode or at least one light emitting diode string, and the driver chip 22 is used to drive the corresponding light emitting unit to emit light.
  • a plurality of gear currents are pre-set in the driver chip 22 according to the display brightness range, and a corresponding relationship between the luminous brightness of the light-emitting unit 21 and the driving current is established.
  • the luminous brightness is positively correlated with the driving current, that is, the greater the luminous brightness, the greater the driving current; the smaller the luminous brightness, the smaller the driving current.
  • the current range can be determined by determining the maximum current value corresponding to the maximum display brightness and the minimum current value corresponding to the minimum display brightness.
  • the maximum current value corresponding to the maximum display brightness of 1600 candelas per square meter is 7 milliamperes
  • the minimum current value corresponding to the minimum display brightness of 600 candelas per square meter is 1 milliampere
  • the current range is 1 milliampere to 7 milliamperes.
  • multiple current values in the current range are set as gear currents.
  • the gear current includes at least two, that is, the maximum current value and the minimum current value of the current range are each a gear current.
  • a current value can also be selected as the gear current at each fixed interval between the maximum current value and the minimum current value.
  • the multiple current values in the current range include four gear currents, which are 1 mA, 3 mA, 5 mA and 7 mA.
  • multiple gear currents have a corresponding relationship with grayscale. Among them, the larger the gear current, the larger the grayscale value; the smaller the gear current, the smaller the grayscale value.
  • the gear current includes multiple, and the driver chip can adjust the initial gear current to the corresponding target gear current according to the power supply voltage value.
  • the median value of a plurality of gear currents is used as the initial gear current.
  • the gear current of the driver chip is negatively adjusted, that is, a gear current smaller than the initial gear current is selected as the target gear current.
  • the gear current of the driver chip is positively adjusted, that is, a gear current larger than the initial gear current is selected as the target gear current.
  • the light-emitting substrate adjusts the magnitude of the power supply voltage according to the gear current of the light-emitting unit 21 and the current value at the second end 132 of the feedback line 13 electrically connected to the corresponding driver chip 22.
  • ⁇ VLED refers to the change value of the power supply voltage
  • N i refers to the current level corresponding to the i-th driver chip 22
  • I FBi refers to the current value at the second end 132 of the feedback line 13 electrically connected to the i-th driver chip 22 .
  • the plurality of light emitting modules 20 are divided into at least two light emitting module groups 201, and the light emitting module group 201 includes a plurality of light emitting modules 20 arranged along a first direction X. At least two light emitting module groups 201 are arranged along a second direction Y, and the first direction X intersects with the second direction Y. Preferably, the first direction X is perpendicular to the second direction Y. As shown in FIG. 2 , the first direction X is the length direction of the display panel, and the second direction is the width direction of the display panel. Specifically, the first direction X may be the width direction of the display panel, and the second direction may be the length direction of the display panel.
  • the multiple second ends 132 of the feedback line 13 electrically connected to the multiple light-emitting modules 20 in the same light-emitting module group 201 are electrically connected to the first node P of the light-emitting module group 201, and the first end 131 of the feedback line 13 is electrically connected to at least two first nodes P.
  • the current gears of the multiple driving chips 22 in the same light-emitting module group 201 are the same, and the current values on the multiple second ends 132 of the feedback line 13 electrically connected to the multiple light-emitting modules 20 in the same light-emitting module group 201 are equal.
  • Ni in Formula 1 refers to the current gear corresponding to the driving chip 22 in the i-th row
  • I FBi refers to the current value on the second end 132 of the feedback line 13 electrically connected to the driving chip 22 in the i-th row.
  • the light-emitting substrate adjusts the power supply voltage value according to the power supply voltage change value obtained by formula 1. Specifically, when the feedback signal provided by the driver chip 22 is that the voltage difference between the power supply voltage and the driving voltage required for the light-emitting unit 21 to emit light is greater than a preset threshold, the light-emitting substrate reduces the power supply voltage according to the power supply voltage change value to obtain the target power supply voltage. Correspondingly, when the feedback signal provided by the driver chip 22 is that the voltage difference between the power supply voltage and the driving voltage required for the light-emitting unit 21 to emit light is less than a preset threshold, the power supply voltage is increased according to the power supply voltage change value to obtain the target power supply voltage.
  • the value range of the preset threshold value includes 0.6 volts to 1.5 volts.
  • the preset threshold value includes 0.6 volts, 0.7 volts, 0.8 volts, 0.9 volts, 1.0 volts, 1.1 volts, 1.2 volts, 1.3 volts, 1.4 volts, and 1.5 volts.
  • the preset threshold value is 0.6 volts. That is, when the voltage difference between the power supply voltage provided by the power module 10 and the driving voltage required for the light-emitting unit 21 to emit light is greater than 0.6 volts, a gear current smaller than the initial gear current is selected as the target gear current.
  • a gear current larger than the initial gear current is selected as the target gear current.
  • the plurality of second ends 122 of the power line 12 are respectively electrically connected to the plurality of light emitting modules 20.
  • the plurality of second ends 122 of the power line 12 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the second node N of the light emitting module group 201.
  • the light emitting module group 201 includes a first light emitting module group 201a and a plurality of second light emitting module groups 201b.
  • the first light emitting module group 201a is also electrically connected to the first end 121 of the power line 12.
  • the first light emitting module group 201a and the plurality of second light emitting module groups 201b are electrically connected via the second node N.
  • an embodiment of the present application provides a light-emitting substrate 200.
  • the difference between the light-emitting substrate 200 and the light-emitting substrate 100 is that multiple second ends 122 of the power line 12 that are respectively electrically connected to multiple light-emitting modules 20 in the same light-emitting module group 201 are electrically connected to the second node N of the light-emitting module group 201, and the first end 121 of the power line 12 is electrically connected to at least two second nodes N.
  • the backlight driver 200 includes a power module 10 and a plurality of light-emitting modules 20.
  • the power module 10 includes a power supply unit 11, a power line 12, and a feedback line 13.
  • the power supply unit 11 includes a voltage output terminal 111 and a signal receiving terminal 112.
  • the power line 12 and the feedback line 13 each have a first end and a plurality of second ends.
  • the first end 121 of the power line 12 is electrically connected to the voltage output terminal 111, and the first end 131 of the feedback line 13 is electrically connected to the signal receiving terminal 112.
  • the power module 10 is used to control the voltage output terminal 111 to output a power supply voltage based on a feedback signal received by the signal receiving terminal 112.
  • the light-emitting module 20 includes a light-emitting unit 21 and a driver chip 22.
  • the driver chip 22 includes a first pin 221 and a second pin 222.
  • the anode A of the light-emitting unit 21 is electrically connected to the second end 122 of the power line 12, and the cathode C of the light-emitting unit 21 is electrically connected to the first pin 221 of the driver chip 22.
  • the second pin 222 of the driver chip 22 is electrically connected to the second end 132 of the feedback line 13.
  • the driving chip 22 is used to drive the corresponding light-emitting unit 21 to emit light, and output a feedback signal to the power supply unit 11 based on the power supply voltage.
  • the plurality of light emitting modules 20 include at least two light emitting module groups 201, and the light emitting module group 201 includes a plurality of light emitting modules 20 arranged along a first direction X.
  • the at least two light emitting module groups 201 are arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y.
  • the plurality of second ends 132 of the feedback line 13 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the first node P of the light emitting module group 201, and the first end 131 of the feedback line 13 is electrically connected to at least two first nodes P.
  • an embodiment of the present application provides a light-emitting substrate 300 .
  • the difference between the light-emitting substrate 300 and the light-emitting substrate 100 is that the power module 10 further includes a resistor 30 , which is electrically connected to each first node P and the first end 131 of the feedback line 13 .
  • the backlight driver 300 includes a power module 10 and a plurality of light-emitting modules 20.
  • the power module 10 includes a power supply unit 11, a resistor 30, a power line 12, and a feedback line 13.
  • the power supply unit 11 includes a voltage output terminal 111 and a signal receiving terminal 112.
  • the power line 12 and the feedback line 13 each have a first end and a plurality of second ends.
  • the first end 121 of the power line 12 is electrically connected to the voltage output terminal 111, and the first end 131 of the feedback line 13 is electrically connected to the signal receiving terminal 112.
  • the power module 10 is used to control the voltage output terminal 111 to output a power supply voltage based on a feedback signal received by the signal receiving terminal 112.
  • the light-emitting module 20 includes a light-emitting unit 21 and a driver chip 22.
  • the driver chip 22 includes a first pin 221 and a second pin 222.
  • the anode A of the light-emitting unit 21 is electrically connected to the second end 122 of the power line 12, and the cathode C of the light-emitting unit 21 is electrically connected to the first pin 221 of the driver chip 22.
  • the second pin 222 of the driver chip 22 is electrically connected to the second end 132 of the feedback line 13.
  • the driver chip 22 is used to drive the corresponding light-emitting unit 21 to emit light, and output a feedback signal to the power supply unit 11 based on the voltage difference between the power supply voltage and the driving voltage required for the light-emitting unit to emit light.
  • the plurality of light emitting modules 20 include at least two light emitting module groups 201, and the light emitting module group 201 includes a plurality of light emitting modules 20 arranged along a first direction X.
  • the at least two light emitting module groups 201 are arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y.
  • the plurality of second ends 132 of the feedback line 13 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the first node P of the light emitting module group 201, and the first end 131 of the feedback line 13 is electrically connected to at least two first nodes P.
  • the plurality of second ends 122 of the power line 12 are respectively electrically connected to the plurality of light emitting modules 20.
  • the plurality of second ends 122 of the power line 12 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the second node N of the light emitting module group 201.
  • the light emitting module group 201 includes a first light emitting module group 201a and a plurality of second light emitting module groups 201b.
  • the first light emitting module group 201a is also electrically connected to the first end 121 of the power line 12.
  • the first light emitting module group 201a and the plurality of second light emitting module groups 201b are electrically connected via the second node N.
  • the resistance value of the resistor 30 is positively correlated with the length of the power line 12 from the corresponding light emitting module group 201 to the voltage output terminal 121 .
  • different light-emitting modules 20 are at different distances from the voltage output terminal 111 of the power module 10.
  • a voltage drop will be generated during the transmission of the power supply voltage due to the influence of the resistor 30 on the power line 12, so that the power supply voltage received by the light-emitting module 20 farther from the voltage output terminal 111 is smaller than the power supply voltage received by the light-emitting module 20 closer to the voltage output terminal 111.
  • the embodiment of the present application sets resistors 30 with different resistance values on the feedback line 13, so that the resistors 30 electrically connected to different light-emitting module groups 201 have different control weights for the change value of the voltage, wherein the control weight of the resistor 30 electrically connected to the light-emitting module group 201 farther from the voltage output terminal 111 for the change value of the voltage is higher than the control weight of the resistor 30 electrically connected to the light-emitting module group 201 closer to the voltage output terminal 111 for the change value of the voltage, which is beneficial to shorten the time required for dynamic voltage regulation and at the same time ensure that the light-emitting module 20 farther from the voltage output terminal 111 quickly reaches the target driving voltage value, thereby improving brightness uniformity.
  • the change value of the power supply voltage is calculated according to Formula 2:
  • ⁇ VLED refers to the change value of the power supply voltage
  • R i refers to the resistor 30 electrically connected to the i-th light-emitting module group 201
  • N i refers to the current gear corresponding to the i-th driver chip 22
  • I FBi refers to the current value at the second end 132 of the feedback line 13 electrically connected to the i-th driver chip 22.
  • the resistance value of R i is greater than the resistance value of R 1. This setting is beneficial to shortening the time required for dynamic voltage regulation. At the same time, it ensures that the light-emitting module 20 far away from the voltage output terminal 111 quickly reaches the target driving voltage value, thereby improving brightness uniformity.
  • the embodiment of the present application provides a light-emitting substrate 400, which differs from the light-emitting substrate 100 in that the light-emitting substrate further includes a compensation area 101, the compensation area 101 is provided with a plurality of light-emitting module groups 201 and a resistor 30, and a resistor 30 is provided between at least some of the plurality of light-emitting module groups 201 in the compensation area 101 and the first end 131 of the feedback line 13.
  • the resistance value of the resistor 30 is positively correlated with the length of the power line 12 from the corresponding light-emitting module group 201 to the voltage output end 121.
  • the number of compensation areas 101 can be 2, 3, 4, ... n, where n is a positive integer.
  • the number of light-emitting module groups 201 in each compensation area 101 can be 2, 3, 4, ... n, where n is a positive integer.
  • the number of resistors 30 provided in each compensation area 101 can be 1, 2, 3, 4, ... n, where n is a positive integer, and the number of resistors 30 in each compensation area 101 can be equal or unequal.
  • FIG. 5 only one compensation area 101 is provided, and one compensation area 101 includes three light-emitting module groups 201, and a resistor 30 is provided between two of the light-emitting module groups 201 and the power module 10.
  • the backlight driver 400 includes a power module 10 and a plurality of light-emitting modules 20.
  • the power module 10 includes a power supply unit 11, a resistor 30, a power line 12, and a feedback line 13.
  • the power supply unit 11 includes a voltage output terminal 111 and a signal receiving terminal 112.
  • the power line 12 and the feedback line 13 each have a first end and a plurality of second ends.
  • the first end 121 of the power line 12 is electrically connected to the voltage output terminal 111, and the first end 131 of the feedback line 13 is electrically connected to the signal receiving terminal 112.
  • the power module 10 is used to control the voltage output terminal 111 to output a power supply voltage based on a feedback signal received by the signal receiving terminal 112.
  • the light-emitting module 20 includes a light-emitting unit 21 and a driver chip 22.
  • the driver chip 22 includes a first pin 221 and a second pin 222.
  • the anode A of the light-emitting unit 21 is electrically connected to the second end 122 of the power line 12, and the cathode C of the light-emitting unit 21 is electrically connected to the first pin 221 of the driver chip 22.
  • the second pin 222 of the driving chip 22 is electrically connected to the second end 132 of the feedback line 13.
  • the driving chip 22 is used to drive the corresponding light emitting unit 21 to emit light, and output a feedback signal to the power supply unit 11 based on the power supply voltage.
  • the plurality of light emitting modules 20 include at least two light emitting module groups 201, and the light emitting module group 201 includes a plurality of light emitting modules 20 arranged along a first direction X.
  • the at least two light emitting module groups 201 are arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y.
  • the plurality of second ends 132 of the feedback line 13 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the first node P of the light emitting module group 201, and the first end 131 of the feedback line 13 is electrically connected to at least two first nodes P.
  • the plurality of second ends 122 of the power line 12 are respectively electrically connected to the plurality of light emitting modules 20.
  • the plurality of second ends 122 of the power line 12 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the second node N of the light emitting module group 201.
  • the light emitting module group 201 includes a first light emitting module group 201a and a plurality of second light emitting module groups 201b.
  • the first light emitting module group 201a is also electrically connected to the first end 121 of the power line 12.
  • the first light emitting module group 201a and the plurality of second light emitting module groups 201b are electrically connected via the second node N.
  • the embodiment of the present application provides a light-emitting substrate 500, which differs from the light-emitting substrate 100 in that the power module 10 further includes a resistor 30, and the resistor 30 is disposed between two adjacent light-emitting module groups 201.
  • the resistance value of the resistor 30 is positively correlated with the length of the power line 12 from the corresponding light-emitting module group 201 to the voltage output terminal 121.
  • the backlight driver 500 includes a power module 10 and a plurality of light-emitting modules 20.
  • the power module 10 includes a power supply unit 11, a resistor 30, a power line 12, and a feedback line 13.
  • the power supply unit 11 includes a voltage output terminal 111 and a signal receiving terminal 112.
  • the power line 12 and the feedback line 13 each have a first end and a plurality of second ends.
  • the first end 121 of the power line 12 is electrically connected to the voltage output terminal 111, and the first end 131 of the feedback line 13 is electrically connected to the signal receiving terminal 112.
  • the power module 10 is used to control the voltage output terminal 111 to output a power supply voltage based on a feedback signal received by the signal receiving terminal 112.
  • the light-emitting module 20 includes a light-emitting unit 21 and a driver chip 22.
  • the driver chip 22 includes a first pin 221 and a second pin 222.
  • the anode A of the light-emitting unit 21 is electrically connected to the second end 122 of the power line 12, and the cathode C of the light-emitting unit 21 is electrically connected to the first pin 221 of the driver chip 22.
  • the second pin 222 of the driving chip 22 is electrically connected to the second end 132 of the feedback line 13.
  • the driving chip 22 is used to drive the corresponding light emitting unit 21 to emit light, and output a feedback signal to the power supply unit 11 based on the power supply voltage.
  • the plurality of light emitting modules 20 include at least two light emitting module groups 201, and the light emitting module group 201 includes a plurality of light emitting modules 20 arranged along a first direction X.
  • the at least two light emitting module groups 201 are arranged along a second direction Y, and the first direction X is perpendicular to the second direction Y.
  • the plurality of second ends 132 of the feedback line 13 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the first node P of the light emitting module group 201, and the first end 131 of the feedback line 13 is electrically connected to at least two first nodes P.
  • the plurality of second ends 122 of the power line 12 are respectively electrically connected to the plurality of light emitting modules 20.
  • the plurality of second ends 122 of the power line 12 electrically connected to the plurality of light emitting modules 20 in the same light emitting module group 201 are electrically connected to the second node N of the light emitting module group 201.
  • the light emitting module group 201 includes a first light emitting module group 201a and a plurality of second light emitting module groups 201b.
  • the first light emitting module group 201a is also electrically connected to the first end 121 of the power line 12.
  • the first light emitting module group 201a and the plurality of second light emitting module groups 201b are electrically connected via the second node N.
  • the present application further provides a driving method, which is applied to the above-mentioned light-emitting substrate, comprising:
  • the light emitting module includes a light emitting unit and a driving chip.
  • obtaining the driving voltage value required for the light emitting module to emit light refers to obtaining the driving voltage value required for the light emitting unit to emit light.
  • the anode of the light-emitting unit is electrically connected to the power module
  • the cathode of the light-emitting unit is electrically connected to the driver chip
  • the voltage difference between the initial power supply voltage value and the driving voltage value is the voltage value input to the driver chip.
  • the driving chip generates a corresponding feedback signal based on the detected voltage difference, and outputs the feedback signal to the power module, wherein the smaller the strength of the feedback signal, the larger the initial power supply voltage output by the power module; conversely, the larger the strength of the feedback signal, the smaller the initial power supply voltage output by the power module.
  • step S30 includes:
  • S302 Determine whether the voltage difference is greater than a preset threshold.
  • the initial gear current is reduced to a target gear current. If the voltage difference is less than the preset threshold, the initial gear current is increased to the target gear current.
  • the preset threshold value ranges from 0.6 V to 1.5 V.
  • the voltage difference between the power supply voltage and the driving voltage required for the light-emitting unit to emit light is between 0.6 V and 1.5 V, it is beneficial to extend the service life of the driving chip and improve the display effect of the light-emitting substrate.

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Abstract

本申请公开了一种发光基板及驱动方法，该发光基板包括：电源模块以及多个发光模块，电源模块包括供电单元、电源线以及反馈线，供电单元包括电压输出端以及信号接收端，电源模块用于基于信号接收端接收的反馈信号控制电压输出端输出电源电压；发光模块用于在电源电压的驱动下发光，并基于电源电压向供电单元输出反馈信号。

Description

发光基板及驱动方法 技术领域
本申请涉及显示技术领域，具体涉及一种发光基板及驱动方法。
 背景技术
微型发光二极管显示装置以及次毫米发光二极管显示装置包括千上万个发光二极管。为了驱动发光二极管发光，现有的发光基板中设有交流-直流电源模块以及直流-直流电源模块，其中，交流-直流电源模块用于将外部电源提供的交流电压转换为直流电压，直流-直流电源模块用于将交流-直流电源模块提供的直流电压转换为驱动发光二极管发光的驱动电压。
现有的发光基板中通过设置多个直流-直流电源模块分别给对应区域的发光二极管提供驱动电压，使得现有的发光基板的电路结构复杂且成本过高。
 发明概述
本申请提供一种发光基板及驱动方法，能够简化电路结构且降低成本。
一方面，本申请的实施例提供一种发光基板，包括：电源模块以及多个发光模块，所述电源模块包括供电单元、电源线以及反馈线，所述供电单元包括电压输出端以及信号接收端，所述电源线以及所述反馈线均具有一第一端以及多个第二端，所述电源线的第一端与所述电压输出端电连接，所述反馈线的第一端与所述信号接收端电连接，所述电源模块用于基于所述信号接收端接收的反馈信号控制所述电压输出端输出电源电压；多个所述发光模块分别与所述电源线的第二端电连接，且多个所述发光模块分别与所述反馈线的第二端电连接，所述发光模块用于在所述电源电压的驱动下发光，并基于所述电源电压向所述供电单元输出所述反馈信号。
另一方面，本申请的实施例还提供一种驱动方法，包括：获取电源模块提供的初始电源电压值以及发光模块发光所需的驱动电压值；计算所述初始电源电压值与所述驱动电压值的电压差值；根据所述电压差值输出反馈信号；根据所述反馈信号将所述初始电源电压值调整为目标电源电压值。
有益效果
本申请提供一种发光基板及驱动方法，该发光基板包括：电源模块以及多个发光模块，所述电源模块包括供电单元、电源线以及反馈线，所述供电单元包括电压输出端以及信号接收端，所述电源线以及所述反馈线均具有一第一端以及多个第二端，所述电源线的第一端与所述电压输出端电连接，所述反馈线的第一端与所述信号接收端电连接，所述电源模块用于基于所述信号接收端接收的反馈信号控制所述电压输出端输出电源电压；多个所述发光模块分别与所述电源线的第二端电连接，且多个所述发光模块分别与所述反馈线的第二端电连接，所述发光模块用于在所述电源电压的驱动下发光，并基于所述电源电压向所述供电单元输出所述反馈信号。该发光基板通过将电源模块中的电源线以及反馈线分别设置多个第二端，并将多个发光模块分别与电源线的多个第二端以及反馈线的多个第二端电连接，即，通过设置一个电源模块实现了给所有的发光模块提供电源电压，减小了电源模块的使用数量，实现了电路结构的简化以及成本的大幅降低，有利于提升产品的竞争力。
 附图说明
图1是本申请的实施例提供的发光基板的框图；
图2是本申请的实施例提供的发光基板的第一种示意图；
图3是本申请的实施例提供的发光基板的第二种示意图；
图4是本申请的实施例提供的发光基板的第三种示意图；
图5是本申请的实施例提供的发光基板的第四种示意图；
图6是本申请的实施例提供的发光基板的第五种示意图；
图7是本申请的实施例提供的驱动方法的流程图；
图8是图7中步骤S30的流程图。
 本发明的实施方式
下面将结合本申请的实施例中的附图对本申请的实施例中的技术方案进行描述。所描述的技术方案仅用于对本申请的思想进行解释和说明，而不应当视为对本申请的保护范围的限制。
如图1所示，本申请的实施例提供一种发光基板100，包括：电源模块10以及多个发光模块20，电源模块10包括供电单元11、电源线12以及反馈线13。供电单元11包括电压输出端111以及信号接收端112。电源线12以及反馈线13均具有一第一端以及多个第二端，电源线12的第一端121与电压输出端111电连接，反馈线13的第一端131与信号接收端112电连接。电源模块10用于基于信号接收端112接收的反馈信号控制电压输出端111输出电源电压。多个发光模块20分别与电源线12的第二端122电连接，且多个发光模块20分别与反馈线13的第二端132电连接。发光模块20用于在电源电压的驱动下发光，并基于电源电压向供电单元11输出反馈信号。
本申请提供的发光基板中，由于电源模块10中的电源线12以及反馈线13分别设置有多个第二端，多个发光模块20分别与电源线12的多个第二端122以及反馈线13的多个第二端电连接，即，通过设置一个电源模块10实现了给所有的发光模块20提供电源电压，减小了电源模块10的使用数量，实现了电路结构的简化以及成本的大幅降低，有利于提升产品的竞争力。
在本申请的实施例中，发光基板100还包括基板，发光模块20以及电源模块10的至少部分设于基板上。具体而言，发光基板可以应用于手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件。
在本申请的实施例中，供电单元11包括交流-直流转换器，交流-直流转换器包括电压输入端、电压输出端以及信号接收端，电压输入端用于接收交流电压，信号接收端用于接收反馈信号，电压输出端用于基于反馈信号控制电源电压的输出。具体地，供电单元11接入外部电源提供的交流电压，例如家用的220伏的交流电压，将交流电压转换为直流电压，用于驱动发光模块20发光。供电单元11根据反馈信号动态调整电源电压的大小，例如，当电源电压值与发光模块20发光所需的驱动电压值不匹配时，发光模块20向供电单元11提供一反馈信号，供电单元11根据该反馈信号调整电源电压值，以确保发光模块20正常发光。与此同时，当电源电压值与发光模块20发光所需的驱动电压值之间的电压差值大于预设阈值时，根据反馈信号降低电源电压值，避免驱动芯片发热且降低功耗。
如图2所示，发光模块20包括发光单元21以及驱动芯片22，驱动芯片22包括第一引脚221以及第二引脚222，发光单元21的阳极A与电源线12的第二端122电连接，发光单元21的阴极C与驱动芯片22的第一引脚221电连接，驱动芯片22的第二引脚222与反馈线13的第二端132电连接。具体地，发光单元21可以是一个发光二极管，或者，多个发光二极管依次串联连接形成的发光二极管串。每个驱动芯片22与至少一个发光二极管或者至少一个发光二极管串电连接，驱动芯片22用于驱动对应的发光单元发光。
在本申请的实施例中，在驱动芯片22中根据显示亮度范围预先设置多个档位电流，建立发光单元21的发光亮度与驱动电流的对应关系。其中，发光亮度与驱动电流呈正相关，即发光亮度越大，驱动电流越大；发光亮度越小，驱动电流越小。通过确定最大显示亮度对应的最大电流值以及最小显示亮度对应的最小电流值，即可确定电流范围。例如，最大显示亮度1600坎德拉每平米对应的最大电流值为7毫安，最小显示亮度600坎德拉每平米对应的最小电流值为1毫安，则电流范围为1毫安至7毫安。
进一步地，将电流范围中的多个电流值设置为档位电流。档位电流包括至少两个，即电流范围的最大电流值和最小电流值分别为一个档位电流。在此基础上，还可以在最大电流值和最小电流值之间每间隔固定值选取一个电流值为档位电流。例如，电流范围中的多个电流值包括四个档位电流，分别为1毫安、3毫安、5毫安和7毫安。进一步地，多个档位电流与灰阶具有对应关系。其中，档位电流越大，灰阶值越大；档位电流越小，灰阶值越小。档位电流包括多个，驱动芯片可以根据电源电压值将初始档位电流调整至对应的目标档位电流。
在本申请的实施例中，多个档位电流中的中位值作为初始档位电流，当电源模块10提供的电源电压与发光单元21发光所需的驱动电压的电压差值大于预设阈值时，负向调整驱动芯片的档位电流，即，选择比初始档位电流小的档位电流作为目标档位电流。对应地，当电源模块10提供的电源电压与发光单元21发光所需的驱动电压的电压差值小于预设阈值时，正向调整驱动芯片的档位电流，即，选择比初始档位电流大的档位电流作为目标档位电流。发光基板根据发光单元21的档位电流以及与对应的驱动芯片22电连接的反馈线13的第二端132上的电流值，调整电源电压的大小。
具体地，电源电压的变化值按照公式一计算得到：
（公式一）
其中，ΔVLED指的是电源电压的变化值，N i指的是第i个驱动芯片22对应的电流档位，I FBi指的是与第i个驱动芯片22电连接的反馈线13的第二端132上的电流值。
在本申请的实施例中，多个发光模块20划分为至少两个发光模块组201，发光模块组201包括多个沿第一方向X排布的发光模块20。至少两个发光模块组201沿第二方向Y排布，第一方向X与第二方向Y交叉。优选地，第一方向X垂直于第二方向Y。如图2所示，第一方向X是显示面板的长度方向，第二方向是显示面板的宽度方向。具体地，第一方向X可以是显示面板的宽度方向，第二方向可以是显示面板的长度方向
在本申请的实施例中，与同一发光模块组201中的多个发光模块20分别电连接的反馈线13的多个第二端132电性连接于发光模块组201的第一节点P，反馈线13的第一端131与至少两个第一节点P电连接。优选地，同一发光模块组201中的多个驱动芯片22的电流档位相同，与同一发光模块组201中的多个发光模块20电连接的反馈线13的多个第二端132上的电流值相等，此时，公式一中的N i指的是第i行驱动芯片22对应的电流档位，I FBi指的是与第i行驱动芯片22电连接的反馈线13的第二端132上的电流值。
在本申请的实施例中，发光基板根据公式一获取的电源电压变化值，调整电源电压值。具体地，当驱动芯片22提供的反馈信号为电源电压与发光单元21发光所需的驱动电压的电压差值大于预设阈值时，发光基板根据电源电压变化值减小电源电压以得到目标电源电压。对应地，当驱动芯片22提供的反馈信号为电源电压与发光单元21发光所需的驱动电压的电压差值小于预设阈值时，根据电源电压变化值增大电源电压以得到目标电源电压。
在本申请的实施例中，预设阈值的取值范围包括0.6伏至1.5伏。具体地，预设阈值包括0.6伏，0.7伏，0.8伏，0.9伏，1.0伏，1.1伏，1.2伏，1.3伏，1.4伏，1.5伏。优选地，预设阈值为0.6伏。即，当电源模块10提供的电源电压与发光单元21发光所需的驱动电压的电压差值大于0.6伏时，选择比初始档位电流小的档位电流作为目标档位电流。对应地，当电源模块10提供的电源电压与发光单元21发光所需的驱动电压的电压差值小于0.6伏时，选择比初始档位电流大的档位电流作为目标档位电流。
在本申请的实施例中，电源线12的多个第二端122分别与多个发光模块20电连接。具体地，与同一发光模块组201中的多个发光模块20分别电连接的电源线12的多个第二端122电性连接于发光模块组201的第二节点N，发光模块组201包括一第一发光模块组201a以及多个第二发光模块组201b，第一发光模块组201a还与电源线12的第一端121电连接，第一发光模块组201a与多个第二发光模块组201b之间通过第二节点N电连接。
如图3所示，本申请的实施例提供一种发光基板200，发光基板200与发光基板100的区别在于：与同一发光模块组201中的多个发光模块20分别电连接的电源线12的多个第二端122电性连接于发光模块组201的第二节点N，电源线12的第一端121与至少两个第二节点N电连接。
具体地，背光驱动200包括电源模块10以及多个发光模块20，电源模块10包括供电单元11、电源线12以及反馈线13。供电单元11包括电压输出端111以及信号接收端112。电源线12以及反馈线13均具有一第一端以及多个第二端，电源线12的第一端121与电压输出端111电连接，反馈线13的第一端131与信号接收端112电连接。电源模块10用于基于信号接收端112接收的反馈信号控制电压输出端111输出电源电压。发光模块20包括发光单元21以及驱动芯片22，驱动芯片22包括第一引脚221以及第二引脚222，发光单元21的阳极A与电源线12的第二端122电连接，发光单元21的阴极C与驱动芯片22的第一引脚221电连接。驱动芯片22的第二引脚222与反馈线13的第二端132电连接。驱动芯片22用于驱动对应的发光单元21发光，并基于电源电压向供电单元11输出反馈信号。
具体地，多个发光模块20包括至少两个发光模块组201，发光模块组201包括多个沿第一方向X排布的发光模块20。至少两个发光模块组201沿第二方向Y排布，第一方向X垂直于第二方向Y。其中，与同一发光模块组201中的多个发光模块20分别电连接的反馈线13的多个第二端132电性连接于发光模块组201的第一节点P，反馈线13的第一端131与至少两个第一节点P电连接。
如图4所示，本申请的实施例提供一种发光基板300，发光基板300与发光基板100的区别在于：电源模块10还包括电阻器30，电阻器30与每一第一节点P以及反馈线13的第一端131电连接。
具体地，背光驱动300包括电源模块10以及多个发光模块20，电源模块10包括供电单元11、电阻器30、电源线12以及反馈线13。供电单元11包括电压输出端111以及信号接收端112。电源线12以及反馈线13均具有一第一端以及多个第二端，电源线12的第一端121与电压输出端111电连接，反馈线13的第一端131与信号接收端112电连接。电源模块10用于基于信号接收端112接收的反馈信号控制电压输出端111输出电源电压。发光模块20包括发光单元21以及驱动芯片22，驱动芯片22包括第一引脚221以及第二引脚222，发光单元21的阳极A与电源线12的第二端122电连接，发光单元21的阴极C与驱动芯片22的第一引脚221电连接。驱动芯片22的第二引脚222与反馈线13的第二端132电连接。驱动芯片22用于驱动对应的发光单元21发光，并基于电源电压与发光单元发光所需的驱动电压之间的电压压差向供电单元11输出反馈信号。
具体地，多个发光模块20包括至少两个发光模块组201，发光模块组201包括多个沿第一方向X排布的发光模块20。至少两个发光模块组201沿第二方向Y排布，第一方向X垂直于第二方向Y。其中，与同一发光模块组201中的多个发光模块20分别电连接的反馈线13的多个第二端132电性连接于发光模块组201的第一节点P，反馈线13的第一端131与至少两个第一节点P电连接。
在本申请的实施例中，电源线12的多个第二端122分别与多个发光模块20电连接。具体地，与同一发光模块组201中的多个发光模块20分别电连接的电源线12的多个第二端122电性连接于发光模块组201的第二节点N，发光模块组201包括一第一发光模块组201a以及多个第二发光模块组201b，第一发光模块组201a还与电源线12的第一端121电连接，第一发光模块组201a与多个第二发光模块组201b之间通过第二节点N电连接。
在本申请的实施例中，电阻器30的阻值与对应的发光模块组201至电压输出端121的电源线12的长度呈正相关。具体地，不同发光模块20距离电源模块10的电压输出端111的远近不同，受电源线12上的电阻器30影响电源电压传输过程中会产生电压压降，使得距离电压输出端111较远的发光模块20接收的电源电压小于距离电压输出端111较近的发光模块20接收的电源电压，因此，本申请的实施例通过在反馈线13上设置不同阻值的电阻器30，使得与不同发光模块组201电连接的电阻器30对于电压电压的变化值的控制权重不同，其中，与距离电压输出端111较远的发光模块组201电连接的电阻器30对于电压电压的变化值的控制权重高于与距离电压输出端111较近的发光模块组201电连接的电阻器30对于电压电压的变化值的控制权重，有利于缩短动态调压所需的时间，同时，确保距离电压输出端111较远的发光模块20快速达到目标驱动电压值，提高亮度均一性。
在本申请的实施例中，电源电压的变化值按照公式二计算得到：
（公式二）
其中，ΔVLED指的是电源电压的变化值，R i指的是与第i个发光模块组201电连接的电阻器30，N i指的是第i个驱动芯片22对应的电流档位，I FBi指的是与第i个驱动芯片22电连接的反馈线13的第二端132上的电流值。
在本申请的实施例中，R i的阻值大于R 1的阻值，该设置有利于缩短动态调压所需的时间，同时，确保距离电压输出端111较远的发光模块20快速达到目标驱动电压值，提高亮度均一性。
如图5所示，本申请的实施例提供一种发光基板400，发光基板400与发光基板100的区别在于：发光基板还包括补偿区101，补偿区101设有多个发光模块组201以及电阻器30，位于补偿区101中的多个发光模块组201中的至少部分发光模块组201与反馈线13的第一端131之间设有电阻器30。其中，电阻器30的阻值与对应的发光模块组201至电压输出端121的电源线12的长度呈正相关。
具体地，补偿区101的个数可以为2个，3个，4个，...n个，n为正整数。每个补偿区101中的发光模块组201的个数可以为2个，3个，4个，...n个，n为正整数。每个补偿区101中设置的电阻器30的个数可以为1个，2个，3个，4个，...n个，n为正整数，且每个补偿区101中的电阻器30的数量可以相等也可以不相等。图5中仅设置有一个补偿区101，一个补偿区101中包括三个发光模块组201，其中的两个发光模块组201与电源模块10之间设有一电阻器30。
具体地，背光驱动400包括电源模块10以及多个发光模块20，电源模块10包括供电单元11、电阻器30、电源线12以及反馈线13。供电单元11包括电压输出端111以及信号接收端112。电源线12以及反馈线13均具有一第一端以及多个第二端，电源线12的第一端121与电压输出端111电连接，反馈线13的第一端131与信号接收端112电连接。电源模块10用于基于信号接收端112接收的反馈信号控制电压输出端111输出电源电压。发光模块20包括发光单元21以及驱动芯片22，驱动芯片22包括第一引脚221以及第二引脚222，发光单元21的阳极A与电源线12的第二端122电连接，发光单元21的阴极C与驱动芯片22的第一引脚221电连接。驱动芯片22的第二引脚222与反馈线13的第二端132电连接。驱动芯片22用于驱动对应的发光单元21发光，并基于电源电压向供电单元11输出反馈信号。
具体地，多个发光模块20包括至少两个发光模块组201，发光模块组201包括多个沿第一方向X排布的发光模块20。至少两个发光模块组201沿第二方向Y排布，第一方向X垂直于第二方向Y。其中，与同一发光模块组201中的多个发光模块20分别电连接的反馈线13的多个第二端132电性连接于发光模块组201的第一节点P，反馈线13的第一端131与至少两个第一节点P电连接。
在本申请的实施例中，电源线12的多个第二端122分别与多个发光模块20电连接。具体地，与同一发光模块组201中的多个发光模块20分别电连接的电源线12的多个第二端122电性连接于发光模块组201的第二节点N，发光模块组201包括一第一发光模块组201a以及多个第二发光模块组201b，第一发光模块组201a还与电源线12的第一端121电连接，第一发光模块组201a与多个第二发光模块组201b之间通过第二节点N电连接。
如图6所示，本申请的实施例提供一种发光基板500，发光基板500与发光基板100的区别在于：电源模块10还包括电阻器30，电阻器30设于相邻两个发光模块组201之间。其中，电阻器30的阻值与对应的发光模块组201至电压输出端121的电源线12的长度呈正相关。
具体地，背光驱动500包括电源模块10以及多个发光模块20，电源模块10包括供电单元11、电阻器30、电源线12以及反馈线13。供电单元11包括电压输出端111以及信号接收端112。电源线12以及反馈线13均具有一第一端以及多个第二端，电源线12的第一端121与电压输出端111电连接，反馈线13的第一端131与信号接收端112电连接。电源模块10用于基于信号接收端112接收的反馈信号控制电压输出端111输出电源电压。发光模块20包括发光单元21以及驱动芯片22，驱动芯片22包括第一引脚221以及第二引脚222，发光单元21的阳极A与电源线12的第二端122电连接，发光单元21的阴极C与驱动芯片22的第一引脚221电连接。驱动芯片22的第二引脚222与反馈线13的第二端132电连接。驱动芯片22用于驱动对应的发光单元21发光，并基于电源电压向供电单元11输出反馈信号。
具体地，多个发光模块20包括至少两个发光模块组201，发光模块组201包括多个沿第一方向X排布的发光模块20。至少两个发光模块组201沿第二方向Y排布，第一方向X垂直于第二方向Y。其中，与同一发光模块组201中的多个发光模块20分别电连接的反馈线13的多个第二端132电性连接于发光模块组201的第一节点P，反馈线13的第一端131与至少两个第一节点P电连接。
在本申请的实施例中，电源线12的多个第二端122分别与多个发光模块20电连接。具体地，与同一发光模块组201中的多个发光模块20分别电连接的电源线12的多个第二端122电性连接于发光模块组201的第二节点N，发光模块组201包括一第一发光模块组201a以及多个第二发光模块组201b，第一发光模块组201a还与电源线12的第一端121电连接，第一发光模块组201a与多个第二发光模块组201b之间通过第二节点N电连接。
如图7所示，本申请还提供一种驱动方法，应用于上述发光基板，包括：
S10、获取电源模块提供的初始电源电压值以及发光模块发光所需的驱动电压值。
具体地，发光模块包括发光单元以及驱动芯片，步骤S10中获取发光模块发光所需的驱动电压值指的是获取发光单元发光所需的驱动电压值。
S20、计算初始电源电压值与驱动电压值的电压差值。
具体地，发光单元的阳极与电源模块电连接，发光单元的阴极与驱动芯片电连接，初始电源电压值与驱动电压值的电压差值即为输入驱动芯片的电压值。
S30、根据电压差值输出反馈信号。
S40、根据反馈信号将初始电源电压值调整为目标电源电压值。
具体地，驱动芯片根据检测到的电压差值产生对应的反馈信号，并向电源模块输出反馈信号，其中，反馈信号的强度越小，则电源模块输出的初始电源电压越大；反之，反馈信号的强度越大，则电源模块输出的初始电源电压越小。
如图8所示，步骤S30包括：
S301、获取发光模块的初始档位电流。
S302、判断电压差值是否大于预设阈值。
S303、根据判断结果将初始档位电流调整至目标档位电流。
具体地，若电压差值大于预设阈值，则降低初始档位电流至目标档位电流。若所述电压差值小于所述预设阈值，则提高所述初始档位电流至目标档位电流。
S304、根据目标档位电流所对应的目标驱动电流值输出反馈信号。
S305、根据反馈信号将初始电源电压值调整为目标电源电压值。
在本申请的实施例中，预设阈值的取值范围包括0.6伏至1.5伏。电源电压与发光单元发光所需的驱动电压的电压差值介于0.6伏至1.5伏之间时，有利于延长驱动芯片的使用寿命并提升发光基板的显示效果。
以上对本申请的实施例所提供的一种发光基板及驱动方法进行了详细介绍，以上实施例的说明只是用于帮助理解本申请的核心思想，上述说明不应被理解为对本申请的保护范围的限制。

Claims (20)

  1. 一种发光基板，其包括：
    电源模块，所述电源模块包括供电单元、电源线以及反馈线，所述供电单元包括电压输出端以及信号接收端，所述电源线以及所述反馈线均具有一第一端以及多个第二端，所述电源线的第一端与所述电压输出端电连接，所述反馈线的第一端与所述信号接收端电连接，所述电源模块用于基于所述信号接收端接收的反馈信号控制所述电压输出端输出电源电压；
    多个发光模块，多个所述发光模块分别与所述电源线的第二端电连接，且多个所述发光模块分别与所述反馈线的第二端电连接，所述发光模块用于在所述电源电压的驱动下发光，并基于所述电源电压向所述供电单元输出所述反馈信号。
  2. 根据权利要求1所述的发光基板，其中，所述发光模块包括发光单元以及驱动芯片，所述驱动芯片包括第一引脚以及第二引脚，所述发光单元的阳极与所述电源线的第二端电连接，所述发光单元的阴极与所述驱动芯片的第一引脚电连接，所述驱动芯片的所述第二引脚与所述反馈线的第二端电连接。
  3. 根据权利要求2所述的发光基板，其中，多个所述发光模块划分为至少两个发光模块组，所述发光模块组包括多个沿第一方向排布的所述发光模块，至少两个所述发光模块组沿第二方向排布，所述第一方向与所述第二方向交叉。
  4. 根据权利要求3所述的发光基板，其中，与同一所述发光模块组中的多个所述发光模块分别电连接的所述反馈线的多个第二端电性连接于所述发光模块组的第一节点，所述反馈线的第一端与至少两个所述第一节点电连接。
  5. 根据权利要求3或4所述的发光基板，其中，与同一所述发光模块组中的多个所述发光模块分别电连接的所述电源线的多个第二端电性连接于所述发光模块组的第二节点，所述电源线的第一端与至少两个所述第二节点电连接。
  6. 根据权利要求4所述的发光基板，其中，电源模块还包括电阻器，所述电阻器设于多个所述发光模块组中的至少部分所述发光模块组与所述反馈线的第一端之间。
  7. 根据权利要求6所述的发光基板，其中，所述发光基板还包括补偿区，所述补偿区设有多个所述发光模块组；
    位于所述补偿区中多个所述发光模块组中的至少部分所述发光模块组与所述反馈线的第一端之间设有所述电阻器。
  8. 根据权利要求6所述的发光基板，其中，所述电阻器与每一所述第一节点以及所述反馈线的第一端电连接。
  9. 根据权利要求6所述的发光基板，其中，所述电源模块还包括电阻器，所述电阻器设于相邻两个所述发光模块组之间。
  10. 根据权利要求6所述的发光基板，其中，所述电阻器的阻值与对应的所述发光模块组至所述电压输出端的所述电源线的长度呈正相关。
  11. 根据权利要求4所述的发光基板，其中，同一所述发光模块组中的多个所述驱动芯片的电流档位相同。
  12. 根据权利要求4所述的发光基板，其中，与同一所述发光模块组中的多个所述发光模块电连接的所述反馈线的多个第二端上的电流值相等。
  13. 根据权利要求1所述的发光基板，其中，所述供电单元包括交流-直流转换器，所述交流-直流转换器包括电压输入端、所述电压输出端以及所述信号接收端，所述电压输入端用于接收交流电压，所述信号接收端用于接收所述反馈信号，所述电压输出端用于基于所述反馈信号控制所述电源电压的输出。
  14. 一种驱动方法，其包括：
    获取电源模块提供的初始电源电压值以及发光模块发光所需的驱动电压值；
    计算所述初始电源电压值与所述驱动电压值的电压差值；
    根据所述电压差值输出反馈信号；
    根据所述反馈信号将所述初始电源电压值调整为目标电源电压值。
  15. 根据权利要求14所述的驱动方法，其中，所述根据所述电压差值输出反馈信号，根据所述反馈信号将所述初始电源电压值调整为目标电源电压值的步骤包括：
    获取所述发光模块的初始档位电流；
    判断所述电压差值是否大于预设阈值；
    根据判断结果将所述初始档位电流调整至目标档位电流；
    根据所述目标档位电流所对应的目标驱动电流值输出反馈信号；
    根据所述反馈信号将所述初始电源电压值调整为目标电源电压值。
  16. 根据权利要求15所述的驱动方法，其中，所述根据判断结果将所述初始档位电流调整至目标档位电流的步骤包括：
    若所述电压差值大于所述预设阈值，则降低所述初始档位电流至目标档位电流。
  17. 根据权利要求15所述的驱动方法，其中，所述根据判断结果将所述初始档位电流调整至目标档位电流的步骤包括：
    若所述电压差值小于所述预设阈值，则提高所述初始档位电流至目标档位电流。
  18. 根据权利要求15所述的驱动方法，其中，所述获取所述发光模块的初始档位电流的步骤包括：
    根据所述发光模块的显示亮度范围设置多个档位电流，建立所述发光模块的发光亮度与驱动电流的对应关系；
    根据最大显示亮度对应的最大电流值以及最小显示亮度对应的最小电流值，获取电流范围；
    根据所述电流范围获取所述发光模块的初始档位电流。
  19. 根据权利要求15所述的驱动方法，其中，初始档位电流为多个所述档位电流中的中位值。
  20. 根据权利要求14所述的驱动方法，其中，所述预设阈值的取值范围包括0.6伏至1.5伏。
PCT/CN2023/104421 2023-06-15 2023-06-30 发光基板及驱动方法 Ceased WO2024254910A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101350176A (zh) * 2007-07-20 2009-01-21 三星电子株式会社 用于显示装置的光源模块以及具有该光源模块的显示装置
CN101990715A (zh) * 2009-06-26 2011-03-23 松下电器产业株式会社 发光元件驱动装置、面状照明装置以及液晶显示装置
CN105047133A (zh) * 2015-08-07 2015-11-11 深圳市华星光电技术有限公司 一种有机发光二极管显示器
CN211792153U (zh) * 2019-10-25 2020-10-27 广州视源电子科技股份有限公司 一种背光控制电路、电视机和智能平板
EP4048030A1 (en) * 2021-02-23 2022-08-24 Leedarson Lighting Co., Ltd. Silicon-controlled-rectifier dial dual-dimming drive circuit, dimming drive device and lamp

Family Cites Families (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE602004008840T2 (de) * 2003-07-07 2008-06-19 Rohm Co., Ltd., Kyoto Lasttreibervorrichtung und tragbare Vorrichtung, die solche Lasttreibervorrichtung verwendet
DE102005028403B4 (de) * 2005-06-20 2013-11-21 Austriamicrosystems Ag Stromquellenanordnung und Verfahren zum Betreiben einer elektrischen Last
DE102006059355A1 (de) * 2006-12-15 2008-06-19 Robert Bosch Gmbh Ansteuerungseinrichtung und Verfahren zum Betrieb wenigstens einer Reihenschaltung von Leuchtdioden
KR100883510B1 (ko) * 2007-04-05 2009-02-17 리치테크 테크놀로지 코포레이션 Ｏｌｅｄ 패널용 소비전력절감 제어회로 및 방법
US20080252222A1 (en) * 2007-04-16 2008-10-16 Texas Instruments Incorporated Systems and methods for driving light-emitting diodes
US20090187925A1 (en) * 2008-01-17 2009-07-23 Delta Electronic Inc. Driver that efficiently regulates current in a plurality of LED strings
JP2010199501A (ja) * 2009-02-27 2010-09-09 Mitsubishi Electric Corp Ｌｅｄ装置と、そのｌｅｄ装置を用いた映像装置
TWI491312B (zh) * 2009-10-16 2015-07-01 Green Solution Tech Co Ltd 負載驅動電路及多負載迴授電路
KR101154837B1 (ko) * 2010-05-10 2012-06-18 주식회사 실리콘웍스 전기적부하의 구동회로 및 그 구동방법
DE102010045389B4 (de) * 2010-09-15 2012-12-06 Austriamicrosystems Ag Spannungsversorgungsanordnung und Verfahren zur Spannungsversorgung einer elektrischen Last
DE102011003519A1 (de) * 2011-02-02 2012-08-02 Robert Bosch Gmbh Verfahren und Vorrichtung zur Regelung elektrischer Leuchtelemente
US8669711B2 (en) * 2011-04-22 2014-03-11 Crs Electronics Dynamic-headroom LED power supply
DE102011112188A1 (de) * 2011-09-01 2013-03-07 Austriamicrosystems Ag Treiberschaltung und Verfahren zum Treiben einer elektrischen Last
DE102019113864B4 (de) * 2019-05-23 2023-06-15 Elmos Semiconductor Se Verfahren zur Regelung der Ausgangsspannung eines Spannungsreglers
CN111179870A (zh) * 2020-01-31 2020-05-19 北京京东方显示技术有限公司 一种电源驱动电路、其驱动方法及显示装置
CN215222534U (zh) * 2021-03-02 2021-12-17 漳州立达信光电子科技有限公司 一种调光驱动电路、调光驱动装置及灯具
CN113939063B (zh) * 2021-12-17 2022-03-22 深圳市明微电子股份有限公司 Led系统供电电源控制方法及供电电源可控的led系统
CN115800690A (zh) * 2022-11-03 2023-03-14 深圳市正浩创新科技股份有限公司 驱动电路的控制方法、供电电路及电子设备

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101350176A (zh) * 2007-07-20 2009-01-21 三星电子株式会社 用于显示装置的光源模块以及具有该光源模块的显示装置
CN101990715A (zh) * 2009-06-26 2011-03-23 松下电器产业株式会社 发光元件驱动装置、面状照明装置以及液晶显示装置
CN105047133A (zh) * 2015-08-07 2015-11-11 深圳市华星光电技术有限公司 一种有机发光二极管显示器
CN211792153U (zh) * 2019-10-25 2020-10-27 广州视源电子科技股份有限公司 一种背光控制电路、电视机和智能平板
EP4048030A1 (en) * 2021-02-23 2022-08-24 Leedarson Lighting Co., Ltd. Silicon-controlled-rectifier dial dual-dimming drive circuit, dimming drive device and lamp

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