WO2024016591A1 - 背光驱动电路、背光模组以及显示装置 - Google Patents

背光驱动电路、背光模组以及显示装置 Download PDF

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Publication number
WO2024016591A1
WO2024016591A1 PCT/CN2022/141294 CN2022141294W WO2024016591A1 WO 2024016591 A1 WO2024016591 A1 WO 2024016591A1 CN 2022141294 W CN2022141294 W CN 2022141294W WO 2024016591 A1 WO2024016591 A1 WO 2024016591A1
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WO
WIPO (PCT)
Prior art keywords
light
electrically connected
current
emitting
transistor
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PCT/CN2022/141294
Other languages
English (en)
French (fr)
Inventor
季国飞
张大雷
郑浩旋
Original Assignee
绵阳惠科光电科技有限公司
惠科股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 绵阳惠科光电科技有限公司, 惠科股份有限公司 filed Critical 绵阳惠科光电科技有限公司
Priority to KR1020237019641A priority Critical patent/KR102767418B1/ko
Priority to JP2023535446A priority patent/JP7639146B2/ja
Priority to EP22931228.5A priority patent/EP4339932A4/en
Priority to US18/332,024 priority patent/US11854501B1/en
Publication of WO2024016591A1 publication Critical patent/WO2024016591A1/zh

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection

Definitions

  • the present application relates to the field of display technology, and in particular, to a backlight driving circuit, a backlight module having the backlight driving circuit, and a display device having the backlight module.
  • a liquid crystal display usually includes a liquid crystal display panel and a backlight module.
  • the backlight module has multiple light bars and a backlight drive circuit that supplies power to the light bars.
  • the LCD requires a backlight module to provide backlight sources of different brightness.
  • Achieving backlight sources with different brightnesses requires a backlight drive circuit to control the current flowing through each light bar. The brightness of each light bar is positively correlated with the current flowing through the light bar.
  • the backlight drive circuit and the multi-channel light bar form a corresponding loop, and the conversion efficiency of the backlight drive circuit is related to the current flowing back to the backlight drive circuit through the loop.
  • the conversion efficiency of the backlight drive circuit is at a relatively high level within a preset current range. Beyond the preset current range, the conversion efficiency of the backlight drive circuit decreases as the current flowing back to the backlight drive circuit increases. It is lower than Within this preset current range, the conversion efficiency of the backlight driving circuit decreases as the current flowing back to the backlight driving circuit decreases.
  • the purpose of this application is to provide a backlight driving circuit, a backlight module having the backlight driving circuit, and a display device having the backlight module.
  • a backlight drive circuit which includes an energy supply module for providing power signals to multiple first luminous columns and multiple second luminous columns connected in parallel.
  • the backlight drive circuit also It includes a current adjustment module, a plurality of first connection lines and a plurality of second connection lines.
  • the energy supply module is electrically connected to the first ends of the plurality of first light-emitting columns and the first ends of the plurality of second light-emitting columns, and the current adjustment module is simultaneously connected to the plurality of first light-emitting columns.
  • the second end of the column is electrically connected to the second ends of the plurality of second light-emitting columns, and the current adjustment module is selectively connected to the plurality of first connection lines or the plurality of second connection lines.
  • the energy supply module is electrically connected, and the current adjustment module is used to detect the luminous brightness of the first luminous column and/or the second luminous column to obtain a detection current, and compare the detection current with the mode switching current. When the detection current is less than the mode switching current, the current adjustment module controls the second end of one of the first light-emitting columns and the second end of one of the second light-emitting columns to be connected to one of the first light-emitting columns at the same time.
  • the current adjustment module controls the second end of one of the first light-emitting columns to be electrically connected to one of the second connection lines and controls a third The second ends of the two light-emitting columns are electrically connected to one of the second connection lines.
  • the backlight driving circuit includes a power supply module, a current adjustment module, a plurality of first connection lines and a plurality of second connection lines.
  • the current adjustment module is selectively electrically connected to the energy supply module through the first connection line or the second connection line.
  • the current adjustment module detects the luminous brightness of the first luminous column and/or the second luminous column to obtain the detection current, and will detect the current. Compare with mode switching current.
  • the current adjustment module controls the first light-emitting column and the second light-emitting column to be electrically connected to the first connection line at the same time; when the detection current is greater than or equal to the mode switching current, the current adjustment module controls the first light-emitting column and the first connection line.
  • the second connection line is electrically connected and controls the second light-emitting column to be electrically connected to the second connection line.
  • the flow back to the The current of the energy supply module is within the preset current range, thereby improving the conversion efficiency of the energy supply module, achieving low power consumption and improving power utilization.
  • the backlight module includes a backplane.
  • the backplane includes a first fixing plate, a second fixing plate and a connecting plate.
  • the first fixing plate And the second fixing plate is arranged oppositely, and the connecting plate is fixedly connected between the first fixing plate and the second fixing plate.
  • the backlight module also includes a plurality of first light-emitting columns, a plurality of second light-emitting columns, a first circuit board and a second circuit board, and the above-mentioned backlight driving circuit.
  • the first circuit board is disposed on a side of the first fixing plate facing the second fixing plate
  • the second circuit board is disposed on a side of the second fixing plate facing the first fixing plate.
  • the backlight driving circuit includes an energy supply module and a current adjustment module.
  • the energy supply module is disposed on the first circuit board
  • the current adjustment module is disposed on the second circuit board.
  • the backlight module provided by the embodiment of the present application includes a plurality of first light-emitting columns, a plurality of second light-emitting columns, and a backlight drive circuit.
  • the backlight drive circuit includes a power supply module, a current adjustment module, and a plurality of first connections. line and a plurality of second connection lines.
  • the current adjustment module is selectively electrically connected to the energy supply module through the first connection line or the second connection line.
  • the current adjustment module detects the luminous brightness of the first luminous column and/or the second luminous column to obtain the detection current, and will detect the current. Compare with mode switching current.
  • the current adjustment module controls the first light-emitting column and the second light-emitting column to be electrically connected to the first connection line at the same time; when the detection current is greater than or equal to the mode switching current, the current adjustment module controls the first light-emitting column and the first connection line.
  • the second connection line is electrically connected and controls the second light-emitting column to be electrically connected to the second connection line.
  • the flow back to the The current of the energy supply module is within the preset current range, thereby improving the conversion efficiency of the energy supply module, achieving low power consumption and improving power utilization.
  • inventions of the present application also provide a display device.
  • the display device includes a display panel and the above-mentioned backlight module.
  • the display panel is located on the light emitting side of the backlight module.
  • the display panel is located on the light emitting side of the backlight module.
  • the image is displayed under the backlight provided by the backlight module.
  • the display device includes a display panel and a backlight module.
  • the backlight module includes a plurality of first light-emitting columns, a plurality of second light-emitting columns, and a backlight drive circuit.
  • the backlight drive circuit includes a power supply.
  • the current adjustment module is selectively electrically connected to the energy supply module through the first connection line or the second connection line.
  • the current adjustment module detects the luminous brightness of the first luminous column and/or the second luminous column to obtain the detection current, and will detect the current. Compare with mode switching current.
  • the current adjustment module controls the first light-emitting column and the second light-emitting column to be electrically connected to the first connection line at the same time; when the detection current is greater than or equal to the mode switching current, the current adjustment module controls the first light-emitting column and the first connection line.
  • the second connection line is electrically connected and controls the second light-emitting column to be electrically connected to the second connection line.
  • the flow back to the The current of the energy supply module is within the preset current range, thereby improving the conversion efficiency of the energy supply module, achieving low power consumption and improving power utilization.
  • the backlight driving method includes:
  • An energy supply module a plurality of first light-emitting columns connected in parallel and a plurality of second light-emitting columns connected in parallel are provided, wherein the energy supply module is connected to the first ends of the plurality of first light-emitting columns and the plurality of third light-emitting columns.
  • the first ends of the two light-emitting columns are all electrically connected, and the second ends of the plurality of first light-emitting columns and the second ends of the plurality of second light-emitting columns are selectively connected through a plurality of first connection lines or a plurality of third Two connecting wires are electrically connected to the energy supply module;
  • the second end of one of the first light-emitting columns and the second end of one of the second light-emitting columns are electrically connected to one of the first connection lines at the same time, or one of the third light-emitting columns is electrically connected to one of the first connection lines.
  • the second end of a light-emitting column and the second end of a second light-emitting column are electrically connected to one of the second connection lines respectively.
  • the backlight driving method includes: providing an energy supply module, a plurality of first light-emitting columns connected in parallel, and a plurality of second light-emitting columns connected in parallel, wherein, The energy supply module is electrically connected to the first ends of the plurality of first light-emitting columns and the first ends of the plurality of second light-emitting columns, and the second ends of the plurality of first light-emitting columns and the plurality of second light-emitting columns are electrically connected.
  • the second end of the second light-emitting column is selectively electrically connected to the energy supply module through a plurality of first connection lines or a plurality of second connection lines; according to a plurality of the first light-emitting columns and/or a plurality of The luminous brightness of the second light-emitting column is used to obtain the detection current; according to the size of the detection current, the second end of one of the first light-emitting columns and the second end of one of the second light-emitting columns are connected to a second end of the second light-emitting column at the same time.
  • the first connection line is electrically connected, or the second end of one of the first light-emitting columns and the second end of one of the second light-emitting columns are electrically connected to one of the second connection lines. Therefore, on the premise of ensuring that the brightness of the first light-emitting column or the second light-emitting column remains unchanged, by changing the connection mode of the second end of the first light-emitting column and the second end of the second light-emitting column, the flow back to the The current of the energy supply module is within the preset current range, thereby improving the conversion efficiency of the energy supply module, achieving low power consumption and improving power utilization.
  • Figure 1 is a schematic structural diagram of a backlight driving circuit disclosed in the first embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a comparison unit of the current adjustment module of the backlight drive circuit disclosed in the first embodiment of the present application;
  • FIG. 3 is a schematic structural diagram of a switching unit of a current adjustment module of a backlight drive circuit disclosed in the first embodiment of the present application;
  • Figure 4 is a schematic diagram of the first layer structure of the backlight module disclosed in the second embodiment of the present application.
  • Figure 5 is a schematic diagram of the second layer structure of the backlight module disclosed in the second embodiment of the present application.
  • Figure 6 is a schematic diagram of the layer structure of the display device disclosed in the third embodiment of the present application.
  • Figure 7 is a schematic flowchart of a backlight driving method disclosed in the fourth embodiment of the present application.
  • FIG. 8 is a schematic flowchart of step S430 in the backlight driving method disclosed in the fourth embodiment of the present application.
  • connection and “connection” mentioned in this application include direct and indirect connections (connections) unless otherwise specified.
  • the directional terms mentioned in this application such as “up”, “down”, “front”, “back”, “left”, “right”, “inside”, “outside”, “side”, etc., are only Reference is made to the direction of the attached drawings.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection.
  • Ground connection, or integral connection can be a mechanical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • connection should be understood in a broad sense.
  • it can be a fixed connection or a detachable connection.
  • Ground connection, or integral connection can be a mechanical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium; it can be an internal connection between two components.
  • the specific meanings of the above terms in this application can be understood on a case-by-case basis.
  • the terms “first”, “second”, etc. in the description, claims, and drawings of this application are used to distinguish different objects, rather than describing a specific sequence.
  • the terms “include”, “can include”, “include”, or “can include” used in this application indicate the existence of the corresponding disclosed functions, operations, elements, etc., and do not limit other one or more more Functions, operations, components, etc.
  • the term “comprises” or “comprises” indicates the presence of the corresponding features, numbers, steps, operations, elements, components, or combinations thereof disclosed in the specification, but does not exclude the presence or addition of one or more other features, numbers, steps, Operations, elements, parts, or combinations thereof, are intended to cover non-exclusive inclusion.
  • “at least one” described in this article means one and more, such as one, two or three, etc., while “plurality” means at least two, such as two or three etc., unless otherwise expressly and specifically limited.
  • FIG. 1 is a schematic structural diagram of a backlight driving circuit disclosed in the first embodiment of the present application.
  • the backlight driving circuit 100 provided in the embodiment of the present application may at least include an energy supply module 10 , a current adjustment module 20 , a plurality of first connection lines 70 and a plurality of second connection lines 80 .
  • the energy supply module 10 is electrically connected to the first ends of a plurality of parallel first light-emitting columns 400 and the first ends of a plurality of parallel second light-emitting columns 500
  • the current adjustment module 20 is electrically connected to a plurality of the parallel first light-emitting columns 500 .
  • the second end of the first light-emitting column 400 and the second ends of the plurality of second light-emitting columns 500 are electrically connected.
  • the current adjustment module 20 also selectively connects a plurality of the first connection lines 70 or a plurality of the plurality of first connection lines 70 .
  • the second connection line 80 is electrically connected to the energy supply module 10 .
  • the power supply module 10 is used to provide power signals to a plurality of the first light-emitting columns 400 and a plurality of the second light-emitting columns 500 at the same time, so as to drive the plurality of the first light-emitting columns 400 and the plurality of second light-emitting columns 500 .
  • the second light-emitting column 500 emits light.
  • the current adjustment module 20 is used to detect the luminous brightness of the first luminous column 400 and/or the second luminous column 500 to obtain a corresponding detection current, and compare the detection current with a mode switching current.
  • the current passing through the first light-emitting column 400 and the current passing through the second light-emitting column 500 are equal, and the number of the second connection lines 80 is twice the number of the first connection lines 70 .
  • the current adjustment module 20 controls one of the first light-emitting columns 400 and a corresponding one of the second light-emitting columns 500 to be connected in parallel to form a light-emitting column group, then multiple first light-emitting columns 400 are connected in parallel.
  • a light-emitting column 400 and a plurality of second light-emitting columns 500 constitute a plurality of light-emitting column groups, and the light-emitting column group including one first light-emitting column 400 and one second light-emitting column 500 is passed through a corresponding one of the
  • the first connection line 70 and the power supply module 10 form a loop, so that the current passing through the first connection line 70 is the current passing through the first light-emitting column 400 and the second light-emitting column in the same light-emitting column group.
  • the sum of the currents of 500 is the sum of the currents of 500.
  • the current adjustment module 20 controls a second end of the first light-emitting column 400 to be electrically connected to a corresponding second connection line 80 and controls a The second end of the second light-emitting column 500 is electrically connected to a corresponding second connection line 80, so that the current passing through the second connection line 80 is the same as the current passing through the first light-emitting column 400 and the current passing through the first light-emitting column 400.
  • the currents of the two light-emitting columns 500 are equal.
  • the luminous brightness of the first luminescent row 400 or the second luminescent row 500 is proportional to the current flowing through the first luminescent row 400 or the second luminescent row 500 , that is, The greater the current passing through the first light-emitting column 400 or the second light-emitting column 500 , the greater the light-emitting brightness.
  • the magnitude of the detection current is proportional to the magnitude of the current passing through the first luminescent array 400 or the magnitude of the current passing through the second luminescent array 500 , that is, the greater the current passing through the first luminescent array 400 , the greater the detection current. The greater the current.
  • the first end may be an anode of the first light-emitting column 400 and the second light-emitting column 500
  • the second end may be an anode of the first light-emitting column 400 and the second light-emitting column 500
  • Two light-emitting columns 500 are cathodes.
  • the current adjustment module 20 obtains the detection current according to the luminous brightness of the first luminous column 400 and/or the second luminous column 500 , and compares the detection current with the mode switching current. A comparison is performed, and according to the comparison result, the second end of one of the first luminous columns 400 and the second end of one of the second luminous columns 500 are electrically connected to one of the first connection lines 70 at the same time (i.e., a first The light-emitting column 400 is connected in parallel with a second light-emitting column 500 and then electrically connected to a first connection line 70), or the second end of the first light-emitting column 400 is electrically connected to one of the second connection lines 80 and the The second end of one of the second light-emitting columns 500 is electrically connected to one of the second connection lines 80 . Then, the magnitude of the current flowing back to the energy supply module 10 through each circuit is changed, so that the current flowing back to the energy supply module 10 through each circuit is within a preset current range.
  • the energy supply module 10 when the current flowing back to the energy supply module 10 through each loop is within the preset current range, the energy supply module 10 has better conversion efficiency. When the current flowing back to the energy supply module 10 through each circuit is outside the preset current range, the conversion efficiency of the energy supply module 10 is low.
  • the mode switching current when the ratio of the detection current to the current passing through the first light-emitting column 400 is 1, that is, when the detection current is equal to the current passing through the first light-emitting column 400 , the mode switching current may be within the preset current range. In other implementations, the mode switching current may be the minimum value of the preset current range.
  • the energy supply module 10 may be a boost circuit, and the energy supply module 10 may boost the voltage input by the DC power supply to illuminate the first light-emitting column 400 and the The voltage required by the second light-emitting column 500.
  • the energy supply module 10 also needs to receive signals from a timing controller (Timing Controller, TCON) board or a single-chip system. (System on Chip, SOC) board's backlight enable signal and brightness modulation signal.
  • TCON Timing Controller
  • SOC System on Chip
  • the number of the first light-emitting columns 400 may be 2 to 10, for example, 2, 4, 7, 10, or other numbers. This application does not specifically limit this.
  • the number of the second light-emitting rows 500 may be 2 to 10, for example, 2, 4, 7, 10, or other numbers, and this application does not specifically limit this. Wherein, the number of the first light-emitting rows 400 is equal to the number of the second light-emitting rows 500 .
  • the number of the first light-emitting rows 400 and the second light-emitting rows 500 is three for example.
  • the number of the first connection lines 70 is three, and the number of the second connection lines 80 is six.
  • the number of light-emitting diodes in the first light-emitting row 400 may be 2 to 10, for example, 2, 3, 6, 10, or other numbers. This application will No specific restrictions are imposed.
  • the number of light-emitting diodes in the second light-emitting row 500 may also be 2 to 10, for example, 2, 3, 6, 10, or other numbers, which is not specifically limited in this application.
  • each of the first light-emitting rows 400 and each of the second light-emitting rows 500 may include a plurality of light-emitting diodes, and the number of light-emitting diodes of each first light-emitting row 400 is equal to The number of light-emitting diodes in each second light-emitting row 500 is equal, so that the resistance of the first light-emitting row 400 is consistent with the resistance of the second light-emitting row 500, so that the resistance of the first light-emitting row 400 and the The currents of the second light-emitting columns 500 are equal.
  • both the energy supply module 10 and the current adjustment module 20 may be corresponding functional integrated chips.
  • the second end of at least one first light-emitting column 400 and the second end of at least one second light-emitting column 500 can be electrically connected to the first connection line 70 at the same time, so that The current flowing back to the power supply module 10 is within the preset current range. At least one may be one, two, three,...etc., and this application does not specifically limit this.
  • the backlight driving circuit 100 includes an energy supply module 10 , a current adjustment module 20 , a plurality of first connection lines 70 and a plurality of second connection lines 80 .
  • the energy supply module 10 drives a plurality of the first light-emitting columns 400 and a plurality of the second light-emitting columns 500 to emit light
  • the current adjustment module 20 detects the first light-emitting columns 400 and/or the second light-emitting columns.
  • the luminous brightness of the column 500 is measured to obtain the corresponding detection current, and the detection current is compared with the mode switching current.
  • the current adjustment module 20 controls the second end of at least one of the first light-emitting columns 400 and the second end of at least one of the second light-emitting columns 500 to pass through a
  • the first connection line 70 is electrically connected to the energy supply module 10 to form a loop, so that the current passing through the first connection line 70 is the same as the current passing through the first light-emitting column 400 and the current passing through the second light-emitting column. The sum of the currents of 500.
  • the current adjustment module 20 controls the second end of the first light-emitting column 400 to be electrically connected to the second connection line 80 and controls a second The second end of the light-emitting column 500 is electrically connected to one of the second connection wires 80 , so that the current passing through the second connection wire 80 is the same as the current passing through the first light-emitting column 400 and the current passing through the second light-emitting column 500 currents are equal.
  • the backlight driving circuit 100 of the present application ensures that the brightness of the first light-emitting column 400 or the second light-emitting column 500 remains unchanged by changing the second end of the first light-emitting column 400 and the second light-emitting column 500
  • the second end is connected in such a way that the current flowing back to the energy supply module 10 is within the preset current range, thereby improving the conversion efficiency of the energy supply module 10, achieving low power consumption and improving power utilization. Rate.
  • the current adjustment module 20 may at least include a brightness detection unit 210 , a comparison unit 230 , a switch control unit 250 and a switch unit 270 .
  • the output end of the brightness detection unit 210 is electrically connected to the comparison unit 230
  • the comparison unit 230 is electrically connected to the switch control unit 250
  • the switch control unit 250 is also electrically connected to the switch unit 270 .
  • the brightness detection unit 210 is used to detect the luminous brightness of the first luminous column 400 and/or the second luminous column 500, and generate the detection current according to the luminous brightness, and the detection current is from The output terminal of the brightness detection unit 210 is output to the comparison unit 230 .
  • the comparison unit 230 is used to sample the detection current at the output end of the brightness detection unit 210 to obtain a sampling current, and compare the sampling current with a preset reference current. Wherein, the sampling current corresponds to the detection current, and the preset reference current corresponds to the mode switching current.
  • the comparison unit 230 is configured to output a first feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the first feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 and the second end of the second light-emitting column 500 to the first connection line 70 at the same time, and through the first connection line 70 forms a loop with the energy supply module 10 . That is, the switch control unit 250 controls the switch unit 270 to connect a first luminous column 400 and a second luminous column 500 in parallel according to the first feedback signal, and connect the parallel first luminous column 400 and the second luminous column 500 .
  • the second light-emitting column 500 is electrically connected to a first connection line 70 , and forms a loop with the energy supply module 10 through the first connection line 70 .
  • the comparison unit 230 is configured to output a second feedback signal to the switch control unit 250 , and the switch control unit 250 controls the
  • the switch unit 270 electrically connects the second end of one of the first light-emitting columns 400 to one of the second connection lines 80 and connects the second end of one of the second light-emitting columns 500 to one of the second light-emitting columns 500 .
  • Wire 80 electrical connection.
  • the brightness detection unit 210 may be a light sensor.
  • the brightness detection unit 210 may at least include a photoresistor (not shown) and a power supply (not shown). One end of the photoresistor is connected to the photoresistor.
  • the power supply is electrically connected, and the other end of the photosensitive resistor is electrically connected to the current adjustment module 20 .
  • the photosensitive resistor receives the light emitted by the first luminous column 400 and/or the second luminous column 500, and changes the luminous brightness according to the luminous brightness of the first luminous column 400 and/or the second luminous column 500.
  • the resistance value of the photoresistor and the current passing through the photoresistor are output from the output end of the brightness detection unit 210 to the comparison unit 230 as the detection current.
  • the luminous brightness is inversely proportional to the resistance of the photoresistor. That is, the greater the luminous brightness is, the smaller the resistance of the photoresistor is, the greater the current passing through the photoresistor is, and the greater the current of the detection current is.
  • the comparison unit 230 includes a comparator 231
  • the comparator 231 includes a non-inverting input terminal 231a, an inverting input terminal 231b and a comparison output terminal 231c.
  • the non-inverting input terminal 231a is electrically connected to the output terminal of the brightness detection unit 210
  • the inverting input terminal 231b receives the preset reference current Aref
  • the comparison output terminal 231c is electrically connected to the switch control unit 250.
  • the comparator 231 receives the sampling current through the non-inverting input terminal 231a.
  • the comparison output terminal 231c When the sampling current is less than the preset reference current Aref, the comparison output terminal 231c outputs a first feedback signal to the switch control unit 250, and the switch control unit 250 controls the switch according to the first feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 and the second end of the second light-emitting column 500 to the first connection line 70 at the same time, and through the first connection line 70 forms a loop with the energy supply module 10 . That is, the switch control unit 250 controls the switch unit 270 to connect a first luminous column 400 and a second luminous column 500 in parallel according to the first feedback signal, and connect the parallel first luminous column 400 and the second luminous column 500 .
  • the second light-emitting column 500 is electrically connected to a first connection line 70 , and forms a loop with the energy supply module 10 through the first connection line 70 .
  • the comparison output terminal 231c When the sampling current is greater than or equal to the preset reference current Aref, the comparison output terminal 231c outputs a second feedback signal to the switch control unit 250, and the switch control unit 250 controls the
  • the switch unit 270 electrically connects the second end of one of the first light-emitting columns 400 to one of the second connection lines 80 and connects the second end of one of the second light-emitting columns 500 to one of the second light-emitting columns 500 .
  • Wire 80 electrical connection.
  • the first feedback signal may be at a low level, and the second feedback signal may be at a high level.
  • the size of the preset reference current Aref can be adjusted and set according to circuit parameter needs, so that the current adjustment module 20 can adapt to different types of the energy supply module 10 and enhance the The versatility of the current regulation module 20 is described. It can be understood that different types of energy supply modules 10 have different corresponding preset current ranges with higher conversion efficiency.
  • the comparison unit 230 further includes a first sampling resistor 235 and a second sampling resistor 237 .
  • the first sampling resistor 235 and the second sampling resistor 237 are connected in series between the output terminal of the brightness detection unit 210 and the ground terminal GND.
  • the non-inverting input terminal 231a is electrically connected between the first sampling resistor 235 and the ground terminal GND. between the second sampling resistors 237 .
  • the first sampling resistor 235 and the second sampling resistor 237 are used to collect the current at the output end of the brightness detection unit 210 and obtain the sampling current.
  • the sampling current is proportional to the current at the output end of the brightness detection unit 210 .
  • the current adjustment module 20 also includes a filter unit 290.
  • the filter unit 290 includes a first connection terminal (not labeled in the figure) and a second connection terminal (not labeled in the figure).
  • the first connection terminal is electrically connected to the output terminal of the brightness detection unit 210
  • the second connection terminal is electrically connected to the ground terminal GND.
  • the filtering unit 290 is used to filter the detection current to eliminate noise of the detection current.
  • the filter unit 290 includes a capacitor, and the capacitor is electrically connected between the output terminal of the brightness detection unit 210 and the ground terminal GND.
  • the switch control unit 250 may be a corresponding functional integrated chip.
  • FIG. 3 is a schematic structural diagram of a switch unit of a current adjustment module of a backlight driving circuit disclosed in the first embodiment of the present application.
  • the switch unit 270 includes a plurality of first transistors 271 , a plurality of second transistors 273 , a plurality of third transistors 275 and a plurality of fourth transistors 277
  • the switch control unit 250 includes a first The signal output terminal 252 and the second signal output terminal 254.
  • the gate of the first transistor 271 is electrically connected to the first signal output terminal 252 of the switch control unit 250 , and the source of the first transistor 271 is electrically connected to the second terminal of the first light-emitting column 400 . connection, the drain of the first transistor 271 is electrically connected to the second connection line 80 .
  • the gate of the second transistor 273 is electrically connected to the second signal output terminal 254 of the switch control unit 250 , and the source of the second transistor 273 is electrically connected to the source of the first transistor 271 .
  • the drain electrode of the second transistor 273 is electrically connected to the first connection line 70 .
  • the gate of the third transistor 275 is electrically connected to the gate of the first transistor 271 and the first signal output terminal 252 of the switch control unit 250 , and the source of the third transistor 275 is connected to the second The second end of the light-emitting column 500 is electrically connected, and the drain of the third transistor 275 is electrically connected to the second connection line 80 .
  • the gate electrode of the fourth transistor 277 is electrically connected to the gate electrode of the second transistor 273 and the second signal output terminal 254 of the switch control unit 250 , and the source electrode of the fourth transistor 277 is electrically connected to the gate electrode of the third transistor 273 .
  • the source of the transistor 275 is electrically connected to the second end of the second light-emitting column 500 while the drain of the fourth transistor 277 is electrically connected to the drain of the second transistor 273 and is also electrically connected to the drain of the second transistor 273 .
  • the first connection line 70 is electrically connected, that is, the drain of the fourth transistor 277 is electrically connected to the drain of the second transistor 273 and simultaneously connected to the same first connection line 70 .
  • the switch control unit 250 When the switch control unit 250 receives the first feedback signal (ie, a low-level feedback signal), the switch control unit 250 outputs a first signal from the first signal output terminal 252 according to the first feedback signal. control signal and output a second control signal from the second signal output terminal 254.
  • the first control signal controls the first transistor 271 and the third transistor 275 to turn off.
  • the second control signal controls the The second transistor 273 and the fourth transistor 277 are turned on.
  • the switch control unit 250 When the switch control unit 250 receives the second feedback signal (ie, a high-level feedback signal), the switch control unit 250 outputs the third signal from the first signal output terminal 252 according to the second feedback signal. Two control signals are output from the second signal output terminal 254. The first control signal controls the second transistor 273 and the fourth transistor 277 to turn off. The second control signal controls The first transistor 271 and the third transistor 275 are turned on.
  • the second feedback signal ie, a high-level feedback signal
  • the number of the first transistors 271 and the number of the second transistors 273 is equal to the number of the first light-emitting columns 400
  • the number of the third transistors 275 is equal to the number of the fourth transistors.
  • the number 277 is equal to the number of the second light-emitting columns 500 .
  • the gates of the plurality of first transistors 271 and the gates of the plurality of third transistors 275 are electrically connected, and are simultaneously electrically connected to the first signal output terminal 252 of the switch control unit 250 .
  • the gates of the plurality of second transistors 273 and the gates of the plurality of fourth transistors 277 are electrically connected, and are simultaneously electrically connected to the second signal output terminal 254 of the switch control unit 250 .
  • a second end of the first light-emitting column 400 is electrically connected to a source of the first transistor 271 and a source of the second transistor 273 at the same time.
  • a second end of the second light-emitting column 500 is electrically connected to a source of the third transistor 275 and a source of the fourth transistor 277 .
  • the drain of one of the first transistors 271 is electrically connected to one of the second connection lines 80
  • the drain of one of the third transistors 275 is electrically connected to one of the second connection lines 80 .
  • the drain of one second transistor 273 and the drain of one fourth transistor 277 are electrically connected to one of the first connection lines 70 at the same time.
  • the transistor may be an N-type MOS transistor or a P-type MOS transistor.
  • the first transistor 271 and the third transistor 275 are of the same type, and the second transistor 273 and the fourth transistor 277 are of the same type.
  • the first control signal may be at a high level, and the second control signal may be at a low level; or, the first control signal may be at a low level, and the second control signal may be at a low level.
  • the signal may be a high level; or, both the first control signal and the second control signal may be a high level or a low level.
  • the backlight driving circuit 100 includes an energy supply module 10 , a current adjustment module 20 , a plurality of first connection lines 70 and a plurality of second connection lines 80 .
  • the energy supply module 10 drives the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 to emit light.
  • the current adjustment module 20 includes a brightness detection unit 210 , a comparison unit 230 , a switch control unit 250 and a switch unit 270 .
  • the brightness detection unit 210 detects the luminous brightness of the first luminous column 400 and/or the second luminous column 500 and generates the detection current according to the luminous brightness.
  • the detection current is generated from the luminance detection unit.
  • the output terminal of 210 is output to the comparison unit 230 .
  • the comparison unit 230 is used to sample the detection current at the output end of the brightness detection unit 210 to obtain a sampling current, and compare the sampling current with a preset reference current. When the sampling current is less than the preset reference current, the comparison unit 230 is configured to output a first feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the first feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 and the second end of the second light-emitting column 500 to the first connection line 70 at the same time, and through the first connection line 70 forms a loop with the energy supply module 10 .
  • the comparison unit is configured to 230 output a second feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the second feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 to the second connection line 80 and connects the second end of the second light-emitting column 500 to the second connection line 80
  • the electrical connection is such that the current passing through the second connection line 80 is equal to the current passing through the first luminous row 400 and the current passing through the second luminous row 500 .
  • the backlight driving circuit 100 of the present application ensures that the brightness of the first light-emitting column 400 or the second light-emitting column 500 remains unchanged by changing the second end of the first light-emitting column 400 and the second light-emitting column 500
  • the second end is connected in such a way that the current flowing back to the energy supply module 10 is within the preset current range, thereby improving the conversion efficiency of the energy supply module 10, achieving low power consumption and improving power utilization. Rate.
  • FIG. 4 is a schematic diagram of a first layer structure of a backlight module disclosed in the second embodiment of the present application.
  • the backlight module 1000 includes a plurality of first light-emitting rows 400, a plurality of second light-emitting rows 500, The backplane 600, the circuit board 800, the reflective layer 900 and the above-mentioned backlight driving circuit 100.
  • the back plate 600 includes a first fixing plate 610, a second fixing plate 630 and a connecting plate 650.
  • the first fixing plate 610 and the second fixing plate 630 are arranged oppositely.
  • the connecting plate 650 is fixedly connected to between the first fixing plate 610 and the second fixing plate 630 .
  • the circuit board 800 is disposed on the side of the first fixing plate 610 facing the second fixing plate 630
  • the reflective layer 900 is disposed on the second fixing plate 630 facing the first fixing plate 610 side.
  • the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 are disposed between the circuit board 800 and the reflective layer 900
  • the backlight driving circuit 100 is disposed on the circuit board 800 .
  • the first fixing plate 610 , the second fixing plate 630 and the connecting plate 650 can be made by integral molding and then bent to form the back plate 600 .
  • the reflective layer 900 is used to reflect the light emitted by the first light-emitting column 400 and the second light-emitting column 500 to improve the light extraction rate of the backlight module 1000 .
  • the backlight module 2000 includes a plurality of first light-emitting columns 400, a plurality of second light-emitting columns 500, a backplane 600, a first circuit board 1100 and a second circuit board 1200, and the above-mentioned backlight driver. Circuit 100.
  • the back plate 600 includes a first fixing plate 610, a second fixing plate 630 and a connecting plate 650.
  • the first fixing plate 610 and the second fixing plate 630 are arranged oppositely.
  • the connecting plate 650 is fixedly connected to between the first fixing plate 610 and the second fixing plate 630 .
  • the first circuit board 1100 is disposed on a side of the first fixing plate 610 facing the second fixing plate 630
  • the second circuit board 1200 is disposed on a side of the second fixing plate 630 facing the second fixing plate 630 .
  • the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 are disposed between the first circuit board 1100 and the second circuit board 1200.
  • the backlight driving circuit 100 includes an energy supply module 10 and a current adjustment module 20.
  • the energy supply module 10 is provided on the first circuit board 1100, and the current adjustment module 20 is provided on the second circuit board 1200. . Since the backlight driving circuit 100 has been described in detail in the above embodiments shown in FIGS. 1 to 3 , details will not be described again here.
  • the first fixing plate 610 , the second fixing plate 630 and the connecting plate 650 can be made by integral molding and then bent to form the back plate 600 .
  • the second circuit board 1200 of the second backlight module 2000 replaces the position of the reflective layer 900 of the first backlight module 1000 .
  • a layer of reflective medium can be coated on the surface of the second circuit board 1200 facing the first luminescent row 400 and the second luminescent row 500 , so that the second circuit board 1200 has the reflective layer 900 Function. Therefore, compared with the first backlight module 1000, the second backlight module 2000 reduces assembly components, saves costs, and improves the yield rate.
  • the backlight module 1000 (2000) may be an edge-lit backlight module. In other embodiments, the backlight module 1000 (2000) may also be a direct-type backlight module, which is not specifically limited in this application.
  • the circuit board 800, the first circuit board 1100 and the second circuit board 1200 may be a flexible circuit board (Flexible Printed Circuit, FPC) or a printed circuit board (Printed Circuit Board). PCB), this application does not impose specific restrictions on this.
  • FPC Flexible Printed Circuit
  • PCB printed circuit board
  • the backlight module may also include other necessary components and components such as a light guide layer, a reflective sheet, and an optical film assembly.
  • a light guide layer such as a light guide layer, a reflective sheet, and an optical film assembly.
  • Those skilled in the art can determine the specific type and actual function of the backlight module. Supplement accordingly and will not go into details here.
  • the backlight module 1000 (2000) provided by the embodiment of the present application includes a backplane 600 and the above-mentioned backlight drive circuit 100.
  • the backlight drive circuit 100 includes a power supply module 10, a current adjustment module 20, a plurality of third A connecting wire 70 and a plurality of second connecting wires 80 .
  • the energy supply module 10 drives the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 to emit light.
  • the current adjustment module 20 includes a brightness detection unit 210 , a comparison unit 230 , a switch control unit 250 and a switch unit 270 .
  • the brightness detection unit 210 detects the luminous brightness of the first luminous column 400 and/or the second luminous column 500 and generates the detection current according to the luminous brightness.
  • the detection current is generated from the luminance detection unit.
  • the output terminal of 210 is output.
  • the comparison unit 230 is used to sample the detection current at the output end of the brightness detection unit 210 to obtain a sampling current, and compare the sampling current with a preset reference current. When the sampling current is less than the preset reference current, the comparison unit 230 is configured to output a first feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the first feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 and the second end of the second light-emitting column 500 to the first connection line 70 at the same time, and through the first connection line 70 forms a loop with the energy supply module 10 .
  • the comparison unit is configured to 230 output a second feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the second feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 to the second connection line 80 and connects the second end of the second light-emitting column 500 to the second connection line 80
  • the electrical connection is such that the current passing through the second connection line 80 is equal to the current passing through the first luminous row 400 and the current passing through the second luminous row 500 . Therefore, the backlight module of the present application can change the distance between the second end of the first light-emitting row 400 and the second light-emitting row 500 by changing the brightness of the first light-emitting row 400 or the second light-emitting row 500 while ensuring that the brightness remains unchanged.
  • connection method of the second end makes the current flowing back to the power supply module 10 be within the preset current range, which improves the conversion efficiency of the power supply module 10, thereby achieving low power consumption and improving power utilization. , thereby improving the market competitiveness of the backlight module 1000.
  • FIG. 6 is a schematic diagram of the layer structure of a display device disclosed in the third embodiment of the present application.
  • the display device 4000 includes a display panel 3000 and the above-mentioned backlight module 1000 (2000).
  • the display panel 3000 and the backlight module 1000 (2000) are stacked, and the display panel 3000 is located on the light exit side of the backlight module 1000 (2000).
  • the display panel 3000 is used to display the light in the backlight module.
  • the image is displayed under the backlight provided by group 1000 (2000). Since the backlight driving circuit 100 and the backlight module 1000 (2000) have been described in detail in the above embodiments shown in FIGS. 1 to 4 , they will not be described again here.
  • the brightness range provided by the backlight module 1000 (2000) can be from 100 nits to 2000 nits, where nits, or candela per square meter (cd/m2), is a physical quantity that indicates the intensity of luminescence on the surface of a luminous body.
  • the backlight module 1000 (2000) needs to provide backlight sources of different brightnesses to the display panel 3000.
  • the backlight module 1000 (2000) can also provide backlight sources of different brightness according to user-defined settings.
  • the display device may be used in electronic devices including, but not limited to, tablet computers, notebook computers, desktop computers, and the like.
  • the specific type of the display device is not particularly limited. Those skilled in the art can design it accordingly according to the specific usage requirements of the electronic device using the display device, which will not be described again here.
  • the display device also includes a drive board, a power board, a high-voltage board, a key control board and other necessary components and components.
  • a drive board for example, a motor, a battery, or a motor.
  • the display panel may include a lower polarizer, an array substrate, a color substrate, an upper polarizer, and other necessary components and components that are stacked in sequence.
  • a lower polarizer an array substrate
  • a color substrate a color substrate
  • an upper polarizer an upper polarizer
  • the display device 4000 provided by the embodiment of the present application includes a display panel and a backlight module 1000 (2000).
  • the backlight module 1000 (2000) includes a backplane 600 and the above-mentioned backlight driving circuit 100.
  • the backlight The driving circuit 100 includes a power supply module 10 , a current adjustment module 20 , a plurality of first connection lines 70 and a plurality of second connection lines 80 .
  • the energy supply module 10 drives the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 to emit light.
  • the current adjustment module 20 includes a brightness detection unit 210 , a comparison unit 230 , a switch control unit 250 and a switch unit 270 .
  • the brightness detection unit 210 detects the luminous brightness of the first luminous column 400 and/or the second luminous column 500 and generates the detection current according to the luminous brightness.
  • the detection current is generated from the luminance detection unit.
  • the output terminal of 210 is output.
  • the comparison unit 230 is used to sample the detection current at the output end of the brightness detection unit 210 to obtain a sampling current, and compare the sampling current with a preset reference current. When the sampling current is less than the preset reference current, the comparison unit 230 is configured to output a first feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the first feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 and the second end of the second light-emitting column 500 to the first connection line 70 at the same time, and through the first connection line 70 forms a loop with the energy supply module 10 .
  • the comparison unit is configured to 230 output a second feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch according to the second feedback signal.
  • the switch unit 270 electrically connects the second end of the first light-emitting column 400 to the second connection line 80 and connects the second end of the second light-emitting column 500 to the second connection line 80
  • the electrical connection is such that the current passing through the second connection line 80 is equal to the current passing through the first luminous row 400 and the current passing through the second luminous row 500 . Therefore, the display device 4000 in the embodiment of the present application can change the second end of the first luminous row 400 and the second luminous row 500 by changing the brightness of the first luminous row 400 or the second luminous row 500 while ensuring that the brightness remains unchanged.
  • connection mode of the second end of 500 makes the current flowing back to the energy supply module 10 be within the preset current range, which improves the conversion efficiency of the energy supply module 10, thereby achieving low power consumption and increasing the power consumption.
  • the utilization rate is thereby improved, thereby improving the market competitiveness of the display device 4000.
  • embodiments of the present application also provide a backlight driving method, which is applied to the backlight driving circuit described in FIGS. 1 to 3 .
  • a backlight driving method which is applied to the backlight driving circuit described in FIGS. 1 to 3 .
  • FIG. 7 is a schematic flowchart of a backlight driving method disclosed in a fourth embodiment of the present application.
  • the backlight driving method may at least include the following steps.
  • S410 Provide an energy supply module 10, a plurality of first light-emitting columns 400 connected in parallel, and a plurality of second light-emitting columns 500 connected in parallel, wherein the energy supply module 10 and the first light-emitting columns 400 of the plurality of first light-emitting columns 400 are connected in parallel. end and the first ends of the plurality of second light-emitting columns 500 are electrically connected, and the second ends of the plurality of first light-emitting columns 400 and the second ends of the plurality of second light-emitting columns 500 selectively pass through A plurality of first connection lines 70 or a plurality of second connection lines 80 are electrically connected to the energy supply module 10 .
  • an energy supply module 10 a current adjustment module 20, a plurality of first light-emitting columns 400 connected in parallel and a plurality of second light-emitting columns 500 connected in parallel are provided.
  • the energy supply module 10 is electrically connected to the first ends of the first light-emitting columns 400 and the first ends of the second light-emitting columns 500
  • the current adjustment module 20 is connected to the first ends of the first light-emitting columns 500 .
  • the second end of the light-emitting column 400 and the second ends of the plurality of second light-emitting columns 500 are electrically connected, and the current adjustment module 20 also selectively passes through a plurality of the first connection lines 70 or a plurality of the third connection lines 70 .
  • Two connecting wires 80 are electrically connected to the energy supply module 10 .
  • the current adjustment module 20 includes a brightness detection unit 210 , a comparison unit 230 , a switch control unit 250 and a switch unit 270 .
  • the number of the first light-emitting columns 400 is equal to the number of the second light-emitting columns 500
  • the number of the first connecting lines 70 is equal to the number of the first light-emitting columns 400 or the number of the first light-emitting columns 500
  • the number of the second light-emitting columns 500 is equal
  • the number of the second connection lines 80 is twice the number of the first light-emitting columns 400 .
  • S420 Obtain detection current according to the luminous brightness of the plurality of first luminescent columns 400 and/or the plurality of second luminescent columns 500.
  • the corresponding detection current can be obtained by the brightness detection unit 210 according to the luminescence brightness of the first luminescence column 400 and/or the second luminescence column 500 .
  • the brightness detection unit 210 may be a light sensor.
  • FIG. 8 is a schematic flowchart of step S430 in the backlight driving method disclosed in the fourth embodiment of the present application.
  • the step S430 may include at least the following steps.
  • the comparison unit 230 obtains the sampling current according to the detection current.
  • the sampling current is proportional to the detection current.
  • the comparison unit 230 compares the sampling current with the preset reference current.
  • sampling current When the sampling current is less than the preset reference current, connect the second end of one of the first light-emitting columns 400 and the second end of the second light-emitting column 500 to one of the first light-emitting columns at the same time.
  • the wire 70 is electrically connected; when the sampling current is greater than or equal to the preset reference current, connect the second end of one of the first luminous columns 400 and the second end of one of the second luminous columns 500 to one respectively.
  • the second connection line 80 is electrically connected.
  • the comparison unit 230 if the sampling current is less than the preset reference current, the comparison unit 230 outputs a first feedback signal to the switch control unit 250, and the switch control unit 250 responds to the The first feedback signal controls the switch unit 270 to electrically connect the second end of one of the first light-emitting columns 400 and the second end of the second light-emitting column 500 to one of the first connection lines 70 at the same time.
  • the comparison unit 230 If the sampling current is less than the preset reference current, the comparison unit 230 outputs a second feedback signal to the switch control unit 250 , and the switch control unit 250 controls the switch unit 270 according to the second feedback signal.
  • the second end of one of the first light-emitting columns 400 is electrically connected to one of the second connection lines 80 and the second end of one of the second light-emitting columns 500 is electrically connected to one of the second connection lines 80 .
  • the backlight driving method includes: providing an energy supply module 10, a plurality of first light-emitting columns 400 connected in parallel, and a plurality of second light-emitting columns 500 connected in parallel, wherein the energy supply module 10 is electrically connected to the first ends of the plurality of first light-emitting columns 400 and the first ends of the plurality of second light-emitting columns 500, and the second ends of the plurality of first light-emitting columns 400 and the plurality of second light-emitting columns 500 are electrically connected.
  • the second end of the second light-emitting column 500 is selectively electrically connected to the energy supply module 10 through a plurality of first connection lines 70 or a plurality of second connection lines 80; according to the plurality of first light-emitting columns 400 and / Or the luminous brightness of multiple second luminous columns 500 to obtain a detection current; according to the magnitude of the detection current, connect the second end of one of the first luminous columns 400 to the end of one of the second luminous columns 500
  • the second end is electrically connected to one of the first connection lines 70 at the same time, or the second end of one of the first light-emitting columns 400 and the second end of one of the second light-emitting columns 500 are respectively connected to one of the second light-emitting columns.
  • the connecting wire 80 is electrically connected.
  • the backlight driving method of the embodiment of the present application on the premise of ensuring that the brightness of the first light-emitting column 400 or the second light-emitting column 500 remains unchanged, by changing the second end of the first light-emitting column 400 and the second light-emitting column
  • the connection mode of the second end of 500 makes the current flowing back to the energy supply module 10 be within the preset current range, which improves the conversion efficiency of the energy supply module 10, thereby achieving low power consumption and increasing the power consumption. Utilization.

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Abstract

一种背光驱动电路（100），包括供能模块（10）与电流调节模块（20）。电流调节模块（20）检测第一发光列（400）和／或第二发光列（500）的发光亮度以获得检测电流，并将检测电流与模式切换电流比较。电流调节模块（20）选择性地控制第一发光列（400）与第二发光列（500）同时与第一连接线（70）电连接，或控制第一发光列（400）与第二连接线（80）电连接及控制第二发光列（500）与第二连接线（80）电连接。

Description

背光驱动电路、背光模组以及显示装置
本申请要求于2022年7月20日提交中国专利局，申请号为202210854938.4，申请名称为“背光驱动电路及方法、背光模组以及显示装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及显示技术领域，尤其涉及一种背光驱动电路、一种具有该背光驱动电路的背光模组以及一种具有该背光模组的显示装置。
背景技术
液晶显示器在人们的生活和工作中占据着越来越重要的位置，其具有机身薄、省电、价格便宜等优点，因此得到了广泛的应用。液晶显示器通常包括液晶显示面板和背光模组，背光模组具有多路灯条以及向灯条供电的背光驱动电路。液晶显示器在不同的工作状态下，需要背光模组提供不同亮度的背光源。实现不同亮度的背光源需要背光驱动电路控制流经每路灯条中电流的大小，其中，每路灯条亮度的大小与流经该灯条中电流的大小呈正相关。
背光驱动电路与多路灯条构成相应的回路，背光驱动电路的转换效率与通过该回路流回所述背光驱动电路的电流大小有关。背光驱动电路的转换效率在一预设电流范围内处于较高的水平，超过该预设电流范围，则背光驱动电路的转换效率随着流回背光驱动电路的电流增大而减小，低于该预设电流范围，则背光驱动电路的转换效率随着流回背光驱动电路的电流减小而减小。
然而，在实际应用中，液晶显示器在低亮度的工作状态下，流回背光驱动电路的电流低于该预设电流范围的最小值。此时，背光驱动电路的转换效率较低，进而导致电能利用率较低。因此，如何在保证灯条亮度不变的前提下通过控制背光驱动电路与多路灯条所构成回路中的电流大小，以提高背光驱动电路的转换效率是本领域技术人员亟待解决的问题。
发明内容
鉴于上述现有技术的不足，本申请的目的在于提供一种背光驱动电路、一种具有该背光驱动电路的背光模组以及一种具有该背光模组的显示装置。
为解决上述技术问题，本申请实施例提供一种背光驱动电路，包括用于向并联的多个第一发光列以及多个第二发光列提供电源信号的供能模块，所述背光驱动电路还包括电流调节模块、多个第一连接线以及多个第二连接线。其中，所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端电连接，所述电流调节模块同时与多个所述第一发光列的第二端以及多个所述第二发光列的第二端电连接，所述电流调节模块选择性地通过多个所述第一连接线或多个所述第二连接线与所述供能模块电连接，所述电流调节模块用于检测所述第一发光列和/或所述第二发光列的发光亮度以获得检测电流，并将所述检测电流与模式切换电流比较。当所述检测电流小于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二连接线电连接以及控制一个第二发光列的第二端与一个所述第二连接线电连接。
综上所述，本申请实施例提供的背光驱动电路包括供能模块、电流调节模块、多个第一连接线与多个第二连接线。电流调节模块选择性地通过第一连接线或第二连接线与供能模块电连接，电流调节模块检测第一发光列和/或第二发光列的发光亮度以获得检测电流，并将检测电流与模式切换电流比较。当检测电流小于模式切换电流时，电流调节模块控制第一发光列与第二发光列同时与第一连接线电连接；当检测电流大于等于模式切换电流时，电流调节模块控制第一发光列与第二连接线电连接以及控制第二发光列与第二连接线电连接。因此，在保证所述第一发光列或所述第二发光列亮度不变的前提下，通过改变第一发光列的第二端与第二发光列的第二端的连接方式，使得流回所述供能模块的电流处于所述预设电流范围内，从而提高了所述供能模块的转换效率，实现了低功耗并提高了电能利用率。
基于同样的构思，本申请实施例还提供一种背光模组，所述背光模组包括背板，所述背板包括第一固定板、第二固定板以及连接板，所述第一固定板以及所述第二固定板相对设置，所述连接板固定连接于所述第一固定板以及所述第二固定板之间。所述背光模组还包括多个第一发光列、多个第二发光列、第一电路板以及第二电路板以及上述的背光驱动电路。所述第一电路板设置于所 述第一固定板面对所述第二固定板的一侧，所述第二电路板设置于所述第二固定板面对所述第一固定板的一侧，多个所述第一发光列以及多个所述第二发光列设置于所述第一电路板与所述第二电路板之间，所述背光驱动电路包括供能模块以及电流调节模块，所述供能模块设置于所述第一电路板上，所述电流调节模块设置于所述第二电路板上。
综上所述，本申请实施例提供的背光模组包括多个第一发光列、多个第二发光列以及背光驱动电路，背光驱动电路包括供能模块、电流调节模块、多个第一连接线与多个第二连接线。电流调节模块选择性地通过第一连接线或第二连接线与供能模块电连接，电流调节模块检测第一发光列和/或第二发光列的发光亮度以获得检测电流，并将检测电流与模式切换电流比较。当检测电流小于模式切换电流时，电流调节模块控制第一发光列与第二发光列同时与第一连接线电连接；当检测电流大于等于模式切换电流时，电流调节模块控制第一发光列与第二连接线电连接以及控制第二发光列与第二连接线电连接。因此，在保证所述第一发光列或所述第二发光列亮度不变的前提下，通过改变第一发光列的第二端与第二发光列的第二端的连接方式，使得流回所述供能模块的电流处于所述预设电流范围内，从而提高了所述供能模块的转换效率，实现了低功耗并提高了电能利用率。
基于同样的构思，本申请实施例还提供一种显示装置，所述显示装置包括显示面板以及上述的背光模组，所述显示面板位于所述背光模组的出光侧，所述显示面板在所述背光模组提供的背光源下显示图像。
综上所述，本申请实施例提供的显示装置包括显示面板以及背光模组，所述背光模组包括多个第一发光列、多个第二发光列以及背光驱动电路，背光驱动电路包括供能模块、电流调节模块、多个第一连接线与多个第二连接线。电流调节模块选择性地通过第一连接线或第二连接线与供能模块电连接，电流调节模块检测第一发光列和/或第二发光列的发光亮度以获得检测电流，并将检测电流与模式切换电流比较。当检测电流小于模式切换电流时，电流调节模块控制第一发光列与第二发光列同时与第一连接线电连接；当检测电流大于等于模式切换电流时，电流调节模块控制第一发光列与第二连接线电连接以及控制第二发光列与第二连接线电连接。因此，在保证所述第一发光列或所述第二发光列亮度不变的前提下，通过改变第一发光列的第二端与第二发光列的第二端的 连接方式，使得流回所述供能模块的电流处于所述预设电流范围内，从而提高了所述供能模块的转换效率，实现了低功耗并提高了电能利用率。
基于同样的构思，本申请实施例还提供一种背光驱动方法，所述背光驱动方法包括：
提供一供能模块、并联的多个第一发光列以及并联的多个第二发光列，其中，所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端均电连接，多个所述第一发光列的第二端以及多个所述第二发光列的第二端选择性地通过多个第一连接线或多个第二连接线与所述供能模块电连接；
根据多个所述第一发光列和/或多个所述第二发光列的发光亮度以获得检测电流；
根据所述检测电流的大小，将一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接，或将一个所述第一发光列的第二端以及一个所述第二发光列的第二端分别与一个所述第二连接线电连接。
综上所述，本申请实施例还提供一种背光驱动方法，所述背光驱动方法包括：提供一供能模块、并联的多个第一发光列以及并联的多个第二发光列，其中，所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端均电连接，多个所述第一发光列的第二端以及多个所述第二发光列的第二端选择性地通过多个第一连接线或多个第二连接线与所述供能模块电连接；根据多个所述第一发光列和/或多个所述第二发光列的发光亮度以获得检测电流；根据所述检测电流的大小，将一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接，或将一个所述第一发光列的第二端以及一个所述第二发光列的第二端分别与一个所述第二连接线电连接。因此，在保证所述第一发光列或所述第二发光列亮度不变的前提下，通过改变第一发光列的第二端与第二发光列的第二端的连接方式，使得流回所述供能模块的电流处于所述预设电流范围内，从而提高了所述供能模块的转换效率，实现了低功耗并提高了电能利用率。
附图说明
为了更清楚地说明本申请实施例中的技术方案，下面将对实施例中所需要 使用的附图作简单地介绍，显而易见地，下面描述中的附图是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请第一实施例公开的背光驱动电路的结构示意图；
图2为本申请第一实施例公开的背光驱动电路的电流调节模块的比较单元的结构示意图；
图3为本申请第一实施例公开的背光驱动电路的电流调节模块的开关单元的结构示意图；
图4为本申请第二实施例公开的背光模组的第一种层结构示意图；
图5为本申请第二实施例公开的背光模组的第二种层结构示意图；
图6为本申请第三实施例公开的显示装置的层结构示意图；
图7为本申请第四实施例公开的背光驱动方法的流程示意图；
图8为本申请第四实施例公开的背光驱动方法中步骤S430的流程示意图。
具体实施方式
为了便于理解本申请，下面将参照相关附图对本申请进行更全面的描述。附图中给出了本申请的较佳实施方式。但是，本申请可以以许多不同的形式来实现，并不限于本文所描述的实施方式。相反地，提供这些实施方式的目的是使对本申请的公开内容理解的更加透彻全面。
以下各实施例的说明是参考附加的图示，用以例示本申请可用以实施的特定实施例。本文中为部件所编序号本身，例如“第一”、“第二”等，仅用于区分所描述的对象，不具有任何顺序或技术含义。而本申请所说“连接”、“联接”，如无特别说明，均包括直接和间接连接(联接)。本申请中所提到的方向用语，例如，“上”、“下”、“前”、“后”、“左”、“右”、“内”、“外”、“侧面”等，仅是参考附加图式的方向，因此，使用的方向用语是为了更好、更清楚地说明及理解本申请，而不是指示或暗指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。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸地连接，或者一体地连接；可以是机械连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。需要说明的是，本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”等是用于区别不同对象，而不是用于描述特定顺序。此外，本申请中使用的术语“包括”、“可以包括”、“包含”、或“可以包含”表示公开的相应功能、操作、元件等的存在，并不限制其他的一个或多个更多功能、操作、元件等。此外，术语“包括”或“包含”表示存在说明书中公开的相应特征、数目、步骤、操作、元素、部件或其组合，而并不排除存在或添加一个或多个其他特征、数目、步骤、操作、元素、部件或其组合，意图在于覆盖不排他的包含。还需要理解的是，本文中 描述的“至少一个”的含义是一个及其以上，例如一个、两个或三个等，而“多个”的含义是至少两个，例如两个或三个等，除非另有明确具体的限定。
除非另有定义，本文所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。本文中在本申请的说明书中所使用的术语只是为了描述具体的实施方式的目的，不是旨在于限制本申请。
请参阅图1，图1为本申请第一实施例公开的背光驱动电路的结构示意图。本申请实施例中提供的背光驱动电路100至少可以包括供能模块10、电流调节模块20、多个第一连接线70以及多个第二连接线80。其中，所述供能模块10与并联的多个第一发光列400的第一端以及并联的多个第二发光列500的第一端电连接，所述电流调节模块20与多个所述第一发光列400的第二端以及多个所述第二发光列500的第二端电连接，所述电流调节模块20还选择性地通过多个所述第一连接线70或多个所述第二连接线80与所述供能模块10电连接。
具体为，所述供能模块10用于同时向多个所述第一发光列400以及多个所述第二发光列500提供电源信号，以驱动多个所述第一发光列400以及多个所述第二发光列500发光。所述电流调节模块20用于检测所述第一发光列400和/或所述第二发光列500的发光亮度以获得相应的检测电流，并将所述检测电流与模式切换电流比较。其中，经过所述第一发光列400的电流以及经过所述第二发光列500的电流相等，所述第二连接线80的数量为所述第一连接线70的数量的两倍。
当所述检测电流小于所述模式切换电流时，所述电流调节模块20控制一个所述第一发光列400与相应的一个所述第二发光列500并联构成一个发光列组，则多个第一发光列400与多个第二发光列500构成了多个发光列组，并将包括一个所述第一发光列400与一个所述第二发光列500的发光列组通过相应的一条所述第一连接线70与所述供能模块10构成回路，使得经过所述第一连接线70的电流为经过同一个发光列组中所述第一发光列400的电流与所述第二发光列500的电流之和。
当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块20控制一个所述第一发光列400的第二端与一个相应的所述第二连接线80电连接以及控制一个第二发光列500的第二端与一个相应的所述第二连接线80电连接，使得经过所述第二连接线80的电流与经过所述第一发光列400的电流以及经过所述第二发光列500的电流相等。
在本申请实施方式中，所述第一发光列400或所述第二发光列500的发光亮度大小与经过所述第一发光列400或所述第二发光列500的电流大小呈正比，即经过所述第一发光列400或所述第二发光列500的电流越大，所述发光亮度越大。所述检测电流的大小与经过所述第一发光列400的电流大小或经过所述第二发光列500的电流大小呈正比，即经过所述第一发光列400的电流越大，所述检测电流就越大。
在本申请实施例中，所述第一端可为所述第一发光列400和所述第二发光列500的阳极，所述第二端可为所述第一发光列400和所述第二发光列500的阴极。
可以理解的是，所述电流调节模块20根据所述第一发光列400和/或所述第二发光列500的发光亮度以获得所述检测电流，将所述检测电流与所述模式切换电流进行比较，并根据比较结果将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接(即一个第一发光列400与一个第二发光列500并联后与一个第一连接线70电连接)，或将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个所述第二发光列500的第二端与一个所述第二连接线80电连接。进而改变经由每条回路流回至所述供能模块10的电流大小，使得经由每条回路流回至所述供能模块10的电流处于预设电流范围内。
在示例性实施方式中，在经由每条回路流回至所述供能模块10的电流处于所述预设电流范围内时，所述供能模块10具有较好的转换效率。在经由每条回路流回至所述供能模块10的电流处于所述预设电流范围外时，所述供能模块10的转换效率较低。
在本申请实施例中，通过改变上述的所述第一发光列400的第二端和所述第二发光列500的第二端的连接方式，通过第一发光列400以及所述第二发光列500的电流并未改变，即当前的发光亮度不会改变。
在示例性实施方式中，当所述检测电流的大小与经过所述第一发光列400的电流大小的比值为1时，即所述检测电流与经过所述第一发光列400的电流相等时，所述模式切换电流可处于所述预设电流范围内。在其他实施方式中，所述模式切换电流可以是所述预设电流范围的最小值。
在本申请实施方式中，所述供能模块10可为升压(Boost)电路，所述供能模块10可将直流电源输入的电压升压至点亮所述第一发光列400以及所述第二发光列500所需要的电压。同时，为了实现所述第一发光列400以及所述第二发光列500的亮度的控制和调制，所述供能模块10还需要接收来自时序控制器(Timing Controller，TCON)板或单片系统(System on Chip，SOC)板的背光使能信号和亮度调制信号。
在示例性实施方式中，所述第一发光列400的个数可为2至10个，例如，2个、4个、7个、10个、或其他数量个，本申请对此不作具体限制。所述第二发光列500的个数可为2至10个，例如，2个、4个、7个、10个、或其他数量个，本申请对此不作具体限制。其中，所述第一发光列400的个数与所述第二发光列500的个数相等。
在本申请实施方式中，以所述第一发光列400以及所述第二发光列500的个数均为3个进行举例说明。相应地，所述第一连接线70的个数为3个，所述第二连接线80的个数为6个。
在示例性实施方式中，所述第一发光列400的发光二极管的个数可为2至10个，例如，2个、3个、6个、10个、或其他数量个，本申请对此不作具体限制。所述第二发光列500的发光二极管的个数也可为2至10个，例如，2个、3个、6个、10个、或其他数量个，本申请对此不作具体限制。
在示例性实施方式中，每个所述第一发光列400与每个所述第二发光列500均可包括多个发光二极管，且每个所述第一发光列400的发光二极管的数量与 每个所述第二发光列500的发光二极管的数量相等，使得所述第一发光列400的电阻与所述第二发光列500的电阻一致，进而使得经过所述第一发光列400以及经过所述第二发光列500的电流相等。
在示例性实施方式中，所述供能模块10以及所述电流调节模块20均可为相应的功能集成芯片。
在其他实施方式中，还可以将至少一个所述第一发光列400的第二端以及至少一个所述第二发光列500的第二端同时与所述第一连接线70电连接，以使得流回所述供能模块10的电流处于所述预设电流范围内。至少一个可以是一个、两个、三个，……等，本申请对此不作具体限制。
综上所述，本申请实施例提供的背光驱动电路100包括供能模块10、电流调节模块20、多个第一连接线70以及多个第二连接线80。所述供能模块10驱动多个所述第一发光列400以及多个所述第二发光列500发光，所述电流调节模块20检测所述第一发光列400和/或所述第二发光列500的发光亮度以获得相应的检测电流，并将所述检测电流与模式切换电流比较。当所述检测电流小于所述模式切换电流时，所述电流调节模块20控制至少一个所述第一发光列400的第二端与至少一个所述第二发光列500的第二端同时通过一条所述第一连接线70与所述供能模块10电连接以构成回路，使得经过所述第一连接线70的电流为经过所述第一发光列400的电流与经过所述第二发光列500的电流之和。当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块20控制一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及控制一个第二发光列500的第二端与一个所述第二连接线80电连接，使得经过所述第二连接线80的电流与经过所述第一发光列400的电流以及经过所述第二发光列500的电流相等。因此，本申请的背光驱动电路100在保证所述第一发光列400或所述第二发光列500亮度不变的前提下，通过改变第一发光列400的第二端与第二发光列500的第二端的连接方式，使得流回所述供能模块10的电流处于所述预设电流范围内，从而提高了所述供能模块10的转换效率，实现了低功耗并提高了电能利用率。
请参阅图1，在本申请实施例中，所述电流调节模块20至少可以包括亮度检测单元210、比较单元230、开关控制单元250以及开关单元270。所述亮度检测单元210的输出端与所述比较单元230电连接，所述比较单元230与所述开关控制单元250电连接，所述开关控制单元250还与所述开关单元270电连接。
具体为，所述亮度检测单元210用于检测所述第一发光列400和/或所述第二发光列500的发光亮度，并根据所述发光亮度生成所述检测电流，所述检测电流从所述亮度检测单元210的输出端输出至所述比较单元230。
所述比较单元230用于对所述亮度检测单元210的输出端的所述检测电流进行采样，以获得采样电流，并将所述采样电流与预设参考电流进行比较。其中，所述采样电流对应所述检测电流，所述预设参考电流对应所述模式切换电流。
当所述采样电流小于所述预设参考电流时，所述比较单元230用于向所述 开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。也即为，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个第一发光列400与一个第二发光列500进行并联，并将并联的第一发光列400和第二发光列500与一个第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。
当所述采样电流大于或等于所述预设参考电流时，所述比较单元230用于向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个所述第二发光列500的第二端与一个所述第二连接线80电连接。
在本申请实施方式中，所述亮度检测单元210可为光传感器，所述亮度检测单元210至少可以包括光敏电阻(图未示)以及电源(图未示)，所述光敏电阻的一端与所述电源电连接，所述光敏电阻的另一端与所述电流调节模块20电连接。所述光敏电阻接收所述第一发光列400和/或所述第二发光列500发出的光线，并根据所述第一发光列400和/或所述第二发光列500的发光亮度改变所述光敏电阻的阻值，经过所述光敏电阻的电流作为所述检测电流从所述亮度检测单元210的输出端输出至所述比较单元230。
在示例性实施方式中，所述发光亮度与所述光敏电阻的阻值呈反比。即，所述发光亮度越大，所述光敏电阻的阻值越小，经过所述光敏电阻的电流越大，所述检测电流的电流越大。
请参阅图2，图2为本申请第一实施例公开的背光驱动电路的电流调节模块的比较单元的结构示意图。在本申请实施例中，所述比较单元230包括比较器231，所述比较器231包括同相输入端231a、反相输入端231b以及比较输出端231c。所述同相输入端231a与所述亮度检测单元210的输出端电连接，所述反相输入端231b接收所述预设参考电流Aref，所述比较输出端231c与所述开关控制单元250电连接，所述比较器231通过所述同相输入端231a接收所述采样电流。
当所述采样电流小于所述预设参考电流Aref时，所述比较输出端231c向所述开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。也即为，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个第一发光列400与一个第二发光列500进行并联，并将并联的第一发光列400和第二发光列500与一个第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。
当所述采样电流大于或等于所述预设参考电流Aref时，所述比较输出端231c向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端 与一个所述第二连接线80电连接以及将一个所述第二发光列500的第二端与一个所述第二连接线80电连接。
在示例性实施方式中，所述第一反馈信号可为低电平，所述第二反馈信号可为高电平。
在示例性实施方式中，所述预设参考电流Aref的大小是可以根据电路参数需要进行调整设定的，便于所述电流调节模块20能够适应不同类型的所述供能模块10，增强了所述电流调节模块20的通用性。可以理解的是，不同类型的所述供能模块10，其对应的具有较高转换效率的所述预设电流范围也不同。
请参阅图2，在本申请实施方式中，所述比较单元230还包括第一采样电阻235以及第二采样电阻237。所述第一采样电阻235与所述第二采样电阻237串联于所述亮度检测单元210的输出端与接地端GND之间，所述同相输入端231a电连接于所述第一采样电阻235与所述第二采样电阻237之间。第一采样电阻235与第二采样电阻237用于采集所述亮度检测单元210的输出端的电流并获得所述采样电流，所述采样电流与所述亮度检测单元210的输出端的电流呈正比。
请参阅图1，在本申请实施方式中，所述电流调节模块20还包括滤波单元290，所述滤波单元290包括第一连接端(图未标)以及第二连接端(图未标)，所述第一连接端与所述亮度检测单元210的输出端电连接，所述第二连接端与所述接地端GND电连接。所述滤波单元290用于对所述检测电流进行滤波处理，以消除所述检测电流的噪音。
在示例性实施方式中，所述滤波单元290包括电容，所述电容电连接于所述亮度检测单元210的输出端以及所述接地端GND之间。
在示例性实施方式中，所述开关控制单元250可为相应的功能集成芯片。
请参阅图3，图3为本申请第一实施例公开的背光驱动电路的电流调节模块的开关单元的结构示意图。在本申请实施方式中，所述开关单元270包括多个第一晶体管271、多个第二晶体管273、多个第三晶体管275以及多个第四晶体管277，所述开关控制单元250包括第一信号输出端252以及第二信号输出端254。
其中，所述第一晶体管271的栅极与所述开关控制单元250的第一信号输出端252电连接，所述第一晶体管271的源极与所述第一发光列400的第二端电连接，所述第一晶体管271的漏极与所述第二连接线80电连接。
所述第二晶体管273的栅极与所述开关控制单元250的第二信号输出端254电连接，所述第二晶体管273的源极与所述第一晶体管271的源极电连接的同时还与所述第一发光列400的第二端电连接，所述第二晶体管273的漏极与所述第一连接线70电连接。
所述第三晶体管275的栅极与所述第一晶体管271的栅极以及所述开关控制单元250的第一信号输出端252电连接，所述第三晶体管275的源极与所述第二发光列500的第二端电连接，所述第三晶体管275的漏极与所述第二连接线80电连接。
所述第四晶体管277的栅极与所述第二晶体管273的栅极以及所述开关控制单元250的第二信号输出端254电连接，所述第四晶体管277的源极与所述 第三晶体管275的源极电连接的同时还与所述第二发光列500的第二端电连接，所述第四晶体管277的漏极与所述第二晶体管273的漏极电连接的同时还与所述第一连接线70电连接，即所述第四晶体管277的漏极与第二晶体管273的漏极电连接，且同时连接至同一条第一连接线70。
当所述开关控制单元250接收所述第一反馈信号(即低电平的反馈信号)，所述开关控制单元250根据所述第一反馈信号从所述第一信号输出端252输出一第一控制信号并从所述第二信号输出端254输出一第二控制信号，所述第一控制信号控制所述第一晶体管271以及所述第三晶体管275截止，所述第二控制信号控制所述第二晶体管273以及所述第四晶体管277导通。
当所述开关控制单元250接收所述第二反馈信号(即高电平的反馈信号)，所述开关控制单元250根据所述第二反馈信号从所述第一信号输出端252输出所述第二控制信号并从所述第二信号输出端254输出所述第一控制信号，所述第一控制信号控制所述第二晶体管273以及所述第四晶体管277截止，所述第二控制信号控制所述第一晶体管271以及所述第三晶体管275导通。
在示例性实施方式中，所述第一晶体管271的数量与所述第二晶体管273的数量与所述第一发光列400的数量相等，所述第三晶体管275的数量与所述第四晶体管277的数量与所述第二发光列500的数量相等。
可以理解的是，多个所述第一晶体管271的栅极以及多个所述第三晶体管275的栅极电连接，并同时与所述开关控制单元250的第一信号输出端252电连接。多个所述第二晶体管273的栅极以及多个所述第四晶体管277的栅极电连接，并同时与所述开关控制单元250的第二信号输出端254电连接。一个所述第一发光列400的第二端同时与一个所述第一晶体管271的源极以及一个所述第二晶体管273的源极电连接，一个所述第二发光列500的第二端同时与一个所述第三晶体管275的源极以及一个所述第四晶体管277的源极电连接。一个所述第一晶体管271的漏极与一个所述第二连接线80电连接，一个所述第三晶体管275的漏极与一个所述第二连接线80电连接。一个所述第二晶体管273的漏极与一个所述第四晶体管277的漏极同时与一个所述第一连接线70电连接。
在示例性实施方式中，所述晶体管可为N型的MOS管或P型的MOS管。其中，所述第一晶体管271与所述第三晶体管275的类型相同，所述第二晶体管273与所述第四晶体管277的类型相同。
在示例性实施方式中，所述第一控制信号可为高电平，所述第二控制信号可为低电平；或者，所述第一控制信号可为低电平，所述第二控制信号可为高电平；或者，所述第一控制信号与所述第二控制信号均可为高电平或低电平。
综上所述，本申请实施例提供的背光驱动电路100包括供能模块10、电流调节模块20、多个第一连接线70以及多个第二连接线80。所述供能模块10驱动多个所述第一发光列400以及多个所述第二发光列500发光。所述电流调节模块20包括亮度检测单元210、比较单元230、开关控制单元250以及开关单元270。所述亮度检测单元210检测所述第一发光列400和/或所述第二发光列500的发光亮度，并根据所述发光亮度生成所述检测电流，所述检测电流从所述亮度检测单元210的输出端输出至所述比较单元230。所述比较单元230用于对 所述亮度检测单元210的输出端的所述检测电流进行采样，以获得采样电流，并将所述采样电流与预设参考电流进行比较。当所述采样电流小于所述预设参考电流时，所述比较单元230用于向所述开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。当所述采样电流大于或等于所述预设参考电流时，所述比较单元用于230向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个第二发光列500的第二端与一个所述第二连接线80电连接，使得经过所述第二连接线80的电流与经过所述第一发光列400的电流以及经过所述第二发光列500的电流相等。因此，本申请的背光驱动电路100在保证所述第一发光列400或所述第二发光列500亮度不变的前提下，通过改变第一发光列400的第二端与第二发光列500的第二端的连接方式，使得流回所述供能模块10的电流处于所述预设电流范围内，从而提高了所述供能模块10的转换效率，实现了低功耗并提高了电能利用率。
基于同样的构思，本申请实施例还提供一种背光模组。请参阅图4，图4为本申请第二实施例公开的背光模组的第一种层结构示意图，所述背光模组1000包括多个第一发光列400、多个第二发光列500、背板600、电路板800、反射层900以及上述的背光驱动电路100。
其中，所述背板600包括第一固定板610、第二固定板630以及连接板650，所述第一固定板610以及所述第二固定板630相对设置，所述连接板650固定连接于所述第一固定板610以及所述第二固定板630之间。所述电路板800设置于所述第一固定板610面对所述第二固定板630的一侧，所述反射层900设置于所述第二固定板630面对所述第一固定板610的一侧。多个所述第一发光列400以及多个所述第二发光列500设置于所述电路板800与所述反射层900之间，所述背光驱动电路100设置于所述电路板800上。
在本申请实施例中，所述第一固定板610、所述第二固定板630以及所述连接板650可通过一体成型制成，并经过弯折后形成所述背板600。
在示例性实施方式中，所述反射层900用于反射所述第一发光列400以及所述第二发光列500发出的光，以提高所述背光模组1000的出光率。
请参阅图5，图5为本申请第二实施例公开的背光模组的第二种层结构示意图。在本申请实施例中，所述背光模组2000包括多个第一发光列400、多个第二发光列500、背板600、第一电路板1100以及第二电路板1200以及上述的背光驱动电路100。
其中，所述背板600包括第一固定板610、第二固定板630以及连接板650，所述第一固定板610以及所述第二固定板630相对设置，所述连接板650固定连接于所述第一固定板610以及所述第二固定板630之间。所述第一电路板1100设置于所述第一固定板610面对所述第二固定板630的一侧，所述第二电路板1200设置于所述第二固定板630面对所述第一固定板610的一侧。多个所述第 一发光列400以及多个所述第二发光列500设置于所述第一电路板1100与所述第二电路板1200之间。所述背光驱动电路100包括供能模块10以及电流调节模块20，所述供能模块10设置于所述第一电路板1100上，所述电流调节模块20设置于所述第二电路板1200上。由于上述图1至图3所示的实施例中已对所述背光驱动电路100进行了较为详细的阐述，在此不再赘述。
在本申请实施例中，所述第一固定板610、所述第二固定板630以及所述连接板650可通过一体成型制成，并经过弯折后形成所述背板600。
可以理解的是，第二种背光模组2000的所述第二电路板1200替代了第一种背光模组1000的所述反射层900的位置。可在所述第二电路板1200面对所述第一发光列400以及所述第二发光列500的表面涂覆一层反射介质，使得所述第二电路板1200具有所述反射层900的功能。因此，第二种背光模组2000相较于第一种背光模组1000，减少了组装部件，节约了成本，并提高了良率。
在本申请实施方式中，所述背光模组1000(2000)可为侧光式背光模组。在其他实施方式中，所述背光模组1000(2000)还可为直下式背光模组，本申请对此不作具体限制。
在本申请实施方式中，所述电路板800、所述第一电路板1100以及所述第二电路板1200可为柔性电路板(Flexible Printed Circuit，FPC)或印制电路板(Printed Circuit Board，PCB)，本申请对此不作具体限制。
在本申请实施方式中，所述背光模组还可包括导光层、反射片以及光学膜片组件等其他必要的部件和组成，本领域技术人员可根据该背光模组的具体类型和实际功能进行相应地补充，在此不再赘述。
综上所述，本申请实施例提供的背光模组1000(2000)包括背板600以及上述的背光驱动电路100，所述背光驱动电路100包括供能模块10、电流调节模块20、多个第一连接线70以及多个第二连接线80。所述供能模块10驱动多个所述第一发光列400以及多个所述第二发光列500发光。所述电流调节模块20包括亮度检测单元210、比较单元230、开关控制单元250以及开关单元270。所述亮度检测单元210检测所述第一发光列400和/或所述第二发光列500的发光亮度，并根据所述发光亮度生成所述检测电流，所述检测电流从所述亮度检测单元210的输出端输出。所述比较单元230用于对所述亮度检测单元210的输出端的所述检测电流进行采样，以获得采样电流，并将所述采样电流与预设参考电流进行比较。当所述采样电流小于所述预设参考电流时，所述比较单元230用于向所述开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。当所述采样电流大于或等于所述预设参考电流时，所述比较单元用于230向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个第二发光列500的第二端与一个所述第二连接线80电连接，使得经过所述第二连接线80的电流与经过所述第一发光列400的电流以及经过所述 第二发光列500的电流相等。因此，本申请的背光模组在保证所述第一发光列400或所述第二发光列500亮度不变的前提下，通过改变第一发光列400的第二端与第二发光列500的第二端的连接方式，使得流回所述供能模块10的电流处于所述预设电流范围内，提高了所述供能模块10的转换效率，从而实现了低功耗并提高了电能利用率，进而提高了所述背光模组1000的市场竞争力。
基于同样的构思，本申请实施例还提供一种显示装置。请参阅图6，图6为本申请第三实施例公开的显示装置的层结构示意图。所述显示装置4000包括显示面板3000以及上述的背光模组1000(2000)。所述显示面板3000与所述背光模组1000(2000)层叠设置，且所述显示面板3000位于所述背光模组1000(2000)的出光侧，所述显示面板3000用于在所述背光模组1000(2000)提供的背光源下显示图像。由于上述图1至图4所示的实施例中已对所述背光驱动电路100以及所述背光模组1000(2000)进行了较为详细的阐述，在此不再赘述。
在本申请实施方式中，所述背光模组1000(2000)提供的亮度范围可为100nits至2000nits，其中，nits或称坎德拉每平米(cd/m2)，为发光体表面发光强弱的物理量。
可以理解的是，所述显示装置4000在不同的工作状态下，例如，在明亮环境中或黑暗环境中，所述背光模组1000(2000)需要向显示面板3000提供不同亮度的背光源。所述背光模组1000(2000)也可根据用户的自定义设置提供不同亮度的背光源。
在示例性实施方式中，所述显示装置可用于包括但不限于平板电脑、笔记本电脑、台式电脑等电子设备。根据本申请的实施例，该显示装置的具体种类不受特别的限制，本领域技术人员可根据应用该显示装置的电子装置的具体的使用要求进行相应地设计，在此不再赘述。
在示例性实施方式中，所述显示装置还包括驱动板、电源板、高压板、按键控制板等其他必要的部件和组成，本领域技术人员可根据该显示装置的具体类型和实际功能进行相应地补充，在此不再赘述。
在示例性实施方式中，所述显示面板可包括依次层叠设置的下偏光片、阵列基板、彩色基板以及上偏光片等其他必要的部件和组成，本领域技术人员可根据该显示装置的具体类型和实际功能进行相应地补充，在此不再赘述。
综上所述，本申请实施例提供的显示装置4000包括显示面板以及背光模组1000(2000)，所述背光模组1000(2000)包括背板600以及上述的背光驱动电路100，所述背光驱动电路100包括供能模块10、电流调节模块20、多个第一连接线70以及多个第二连接线80。所述供能模块10驱动多个所述第一发光列400以及多个所述第二发光列500发光。所述电流调节模块20包括亮度检测单元210、比较单元230、开关控制单元250以及开关单元270。所述亮度检测单元210检测所述第一发光列400和/或所述第二发光列500的发光亮度，并根据所述发光亮度生成所述检测电流，所述检测电流从所述亮度检测单元210的输出端输出。所述比较单元230用于对所述亮度检测单元210的输出端的所述检测电流进行采样，以获得采样电流，并将所述采样电流与预设参考电流进行比较。当所述采样电流小于所述预设参考电流时，所述比较单元230用于向所述 开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，并通过所述第一连接线70与所述供能模块10构成回路。当所述采样电流大于或等于所述预设参考电流时，所述比较单元用于230向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个第二发光列500的第二端与一个所述第二连接线80电连接，使得经过所述第二连接线80的电流与经过所述第一发光列400的电流以及经过所述第二发光列500的电流相等。因此，本申请实施例的显示装置4000在保证所述第一发光列400或所述第二发光列500亮度不变的前提下，通过改变第一发光列400的第二端与第二发光列500的第二端的连接方式，使得流回所述供能模块10的电流处于所述预设电流范围内，提高了所述供能模块10的转换效率，从而实现了低功耗并提高了电能利用率，进而提高了所述显示装置4000的市场竞争力。
基于同样的构思，本申请实施例还提供一种背光驱动方法，应用于图1至图3所述的背光驱动电路。本申请第四实施例的背光驱动方法涉及到背光驱动电路的内容请参照第一实施例的背光驱动电路的相关描述，在此不再赘述。请参阅图7，图7为本申请第四实施例公开的背光驱动方法的流程示意图，所述背光驱动方法至少可以包括以下步骤。
S410、提供一供能模块10、并联的多个第一发光列400以及并联的多个第二发光列500，其中，所述供能模块10与多个所述第一发光列400的第一端以及多个所述第二发光列500的第一端均电连接，多个所述第一发光列400的第二端以及多个所述第二发光列500的第二端选择性地通过多个第一连接线70或多个第二连接线80与所述供能模块10电连接。
具体为，在本申请实施例中，提供一供能模块10、电流调节模块20、并联的多个第一发光列400以及并联的多个第二发光列500。所述供能模块10与多个所述第一发光列400的第一端以及多个所述第二发光列500的第一端电连接，所述电流调节模块20与多个所述第一发光列400的第二端以及多个所述第二发光列500的第二端电连接，所述电流调节模块20还选择性地通过多个所述第一连接线70或多个所述第二连接线80与所述供能模块10电连接。其中，所述电流调节模块20包括亮度检测单元210、比较单元230、开关控制单元250以及开关单元270。
在本申请实施方式中，所述第一发光列400的数量与所述第二发光列500的数量相等，所述第一连接线70的数量与所述第一发光列400的数量或所述第二发光列500的数量相等，所述第二连接线80的数量为所述第一发光列400的数量的两倍。
S420、根据多个所述第一发光列400和/或多个所述第二发光列500的发光亮度以获得检测电流。
具体为，在本申请实施例中，可通过所述亮度检测单元210根据所述第一发光列400和/或所述第二发光列500的发光亮度以获得相应的检测电流。
在示例性实施方式中，所述亮度检测单元210可为光传感器。
S430、根据所述检测电流的大小，将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接；或将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端分别与一个所述第二连接线80电连接。
请参阅图8，图8为本申请第四实施例公开的背光驱动方法中步骤S430的流程示意图。所述步骤S430至少可以包括以下步骤。
S431、根据所述检测电流获取采样电流；
具体为，在本申请实施例中，通过所述比较单元230根据所述检测电流获取采样电流。
在本申请实施方式中，所述采样电流与所述检测电流呈正比。
S432、将所述采样电流与预设参考电流进行对比；
具体为，在本申请实施例中，所述比较单元230将所述采样电流与所述预设参考电流进行比较。
S433、当所述采样电流小于所述预设参考电流时，将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接；当所述采样电流大于或等于所述预设参考电流时，将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端分别与一个所述第二连接线80电连接。
具体为，在本申请实施例中，若所述采样电流小于所述预设参考电流，所述比较单元230向所述开关控制单元250输出第一反馈信号，所述开关控制单元250根据所述第一反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接。
若所述采样电流小于所述预设参考电流，所述比较单元230向所述开关控制单元250输出第二反馈信号，所述开关控制单元250根据所述第二反馈信号控制所述开关单元270将一个所述第一发光列400的第二端与一个所述第二连接线80电连接以及将一个所述第二发光列500的第二端与一个所述第二连接线80电连接。
综上所述，本申请实施例提供的背光驱动方法包括：提供一供能模块10、并联的多个第一发光列400以及并联的多个第二发光列500，其中，所述供能模块10与多个所述第一发光列400的第一端以及多个所述第二发光列500的第一端均电连接，多个所述第一发光列400的第二端以及多个所述第二发光列500的第二端选择性地通过多个第一连接线70或多个第二连接线80与所述供能模块10电连接；根据多个所述第一发光列400和/或多个所述第二发光列500的发光亮度以获得检测电流；根据所述检测电流的大小，将一个所述第一发光列400的第二端与一个所述第二发光列500的第二端同时与一个所述第一连接线70电连接，或将一个所述第一发光列400的第二端以及一个所述第二发光列500的第二端分别与一个所述第二连接线80电连接。因此，本申请实施例的背光驱动方法在保证所述第一发光列400或所述第二发光列500亮度不变的前提下，通 过改变第一发光列400的第二端与第二发光列500的第二端的连接方式，使得流回所述供能模块10的电流处于所述预设电流范围内，提高了所述供能模块10的转换效率，从而实现了低功耗并提高了电能利用率。
本申请中所描述的流程图仅仅为一个实施例，在不偏离本申请的精神的情况下对此图示或者本申请中的步骤可以有多种修改变化。比如，可以不同次序的执行这些步骤，或者可以增加、删除或者修改某些步骤。本领域的一般技术人员可以理解实现上述实施例的全部或部分流程，并依本申请权利要求所作的等同变化，仍属于本申请所涵盖的范围。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“示意性实施方式”、“示例”、“具体示例”或“一些示例”等的描述意指结合所述实施方式或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施方式或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施方式或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施方式或示例中以合适的方式结合。
应当理解的是，本申请的应用不限于上述的举例，对本领域普通技术人员来说，可以根据上述说明加以改进或变换，所有这些改进和变换都应属于本申请所附权利要求的保护范围。本领域的一般技术人员可以理解实现上述实施例的全部或部分方法，并依本申请权利要求所作的等同变化，仍属于本申请所涵盖的范围。

Claims (18)

  1. 一种背光驱动电路，包括用于向并联的多个第一发光列以及并联的多个第二发光列提供电源信号的供能模块，其中，所述背光驱动电路还包括电流调节模块、多个第一连接线以及多个第二连接线，其中，
    所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端电连接，所述电流调节模块同时与多个所述第一发光列的第二端以及多个所述第二发光列的第二端电连接，所述电流调节模块选择性地通过多个所述第一连接线或多个所述第二连接线与所述供能模块电连接，所述电流调节模块用于检测所述第一发光列和/或所述第二发光列的发光亮度以获得检测电流，并将所述检测电流与模式切换电流比较；
    当所述检测电流小于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二连接线电连接以及控制一个第二发光列的第二端与一个所述第二连接线电连接。
  2. 如权利要求1所述的背光驱动电路，其中，所述电流调节模块包括亮度检测单元、比较单元、开关控制单元以及开关单元，所述亮度检测单元的输出端与所述比较单元电连接，所述比较单元与所述开关控制单元电连接，所述开关控制单元还与所述开关单元电连接，其中，
    所述亮度检测单元用于检测所述第一发光列和/或所述第二发光列的发光亮度，并根据所述发光亮度生成所述检测电流，所述亮度检测单元的输出端输出所述检测电流至所述比较单元，所述比较单元用于对所述检测电流进行采样以获得采样电流，并将所述采样电流与预设参考电流进行比较；
    当所述采样电流小于所述预设参考电流时，所述比较单元向所述开关控制单元输出第一反馈信号，所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端以及一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较单元向所述开关控制单元输出第二反馈信号，所述开关控制单元根据所述第二反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  3. 如权利要求2所述的背光驱动电路，其中，所述比较单元包括比较器，所述比较器包括同相输入端、反相输入端以及比较输出端，所述同相输入端与所述亮度检测单元的输出端电连接，所述反相输入端接收所述预设参考电流，所述比较输出端与所述开关控制单元电连接，所述比较器通过所述同相输入端接收所述采样电流；
    当所述采样电流小于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第一反馈信号，使得所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第二反馈信号，使得所述开关控制单元根据所述第二反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  4. 如权利要求3所述的背光驱动电路，其中，所述比较单元还包括第一采样电阻以及第二采样电阻，所述第一采样电阻与所述第二采样电阻串联于所述亮度检测单元的输出端与接地端之间，所述同相输入端电连接于所述第一采样电阻与所述第二采样电阻之间，所述第一采样电阻与所述第二采样电阻采集所述亮度检测单元的输出端的电流并获得所述采样电流。
  5. 如权利要求2所述的背光驱动电路，其中，所述开关单元包括多个第一晶体管、多个第二晶体管、多个第三晶体管以及多个第四晶体管，所述开关控制单元包括第一信号输出端以及第二信号输出端；
    所述第一晶体管的栅极与所述开关控制单元的第一信号输出端电连接，所述第一晶体管的源极与所述第一发光列的第二端电连接，所述第一晶体管的漏极与所述第二连接线电连接；
    所述第二晶体管的栅极与所述开关控制单元的第二信号输出端电连接，所述第二晶体管的源极与所述第一发光列的第二端电连接，所述第二晶体管的漏极与所述第一连接线电连接；
    所述第三晶体管的栅极与所述第一晶体管的栅极以及所述开关控制单元的第一信号输出端电连接，所述第三晶体管的源极与所述第二发光列的第二端电连接，所述第三晶体管的漏极与所述第二连接线电连接；
    所述第四晶体管的栅极与所述第二晶体管的栅极以及所述开关控制单元的 第二信号输出端电连接，所述第四晶体管的源极与所述第二发光列的第二端电连接，所述第四晶体管的漏极与所述第二晶体管的漏极电连接的同时还与所述第一连接线电连接。
  6. 如权利要求5所述的背光驱动电路，其中，当所述开关控制单元接收所述第一反馈信号，所述开关控制单元根据所述第一反馈信号从所述第一信号输出端输出第一控制信号并从所述第二信号输出端输出第二控制信号，所述第一控制信号控制所述第一晶体管以及所述第三晶体管截止，所述第二控制信号控制所述第二晶体管以及所述第四晶体管导通；
    当所述开关控制单元接收所述第二反馈信号，所述开关控制单元根据所述第二反馈信号从所述第一信号输出端输出所述第二控制信号并从所述第二信号输出端输出所述第一控制信号，所述第一控制信号控制所述第二晶体管以及所述第四晶体管截止，所述第二控制信号控制所述第一晶体管以及所述第三晶体管导通。
  7. 一种背光模组，包括背板，所述背板包括第一固定板、第二固定板以及连接板，所述第一固定板以及所述第二固定板相对设置，所述连接板固定连接于所述第一固定板以及所述第二固定板之间，其中，所述背光模组还包括多个第一发光列、多个第二发光列、第一电路板以及第二电路板以及背光驱动电路，其中，所述第一电路板设置于所述第一固定板面对所述第二固定板的一侧，所述第二电路板设置于所述第二固定板面对所述第一固定板的一侧，多个所述第一发光列以及多个所述第二发光列设置于所述第一电路板与所述第二电路板之间，所述背光驱动电路包括供能模块以及电流调节模块，所述供能模块设置于所述第一电路板上，所述电流调节模块设置于所述第二电路板上，所述背光驱动电路包括用于向并联的多个所述第一发光列以及并联的多个所述第二发光列提供电源信号的供能模块，所述背光驱动电路还包括电流调节模块、多个第一连接线以及多个第二连接线，其中，所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端电连接，所述电流调节模块同时与多个所述第一发光列的第二端以及多个所述第二发光列的第二端电连接，所述电流调节模块选择性地通过多个所述第一连接线或多个所述第二连接线与所述供能模块电连接，所述电流调节模块用于检测所述第一发光列和/或所述第二发光列的发光亮度以获得检测电流，并将所述检测电流与模式切换电流比较；
    当所述检测电流小于所述模式切换电流时，所述电流调节模块控制一个所 述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二连接线电连接以及控制一个第二发光列的第二端与一个所述第二连接线电连接。
  8. 如权利要求7所述的背光模组，其中，所述电流调节模块包括亮度检测单元、比较单元、开关控制单元以及开关单元，所述亮度检测单元的输出端与所述比较单元电连接，所述比较单元与所述开关控制单元电连接，所述开关控制单元还与所述开关单元电连接，其中，
    所述亮度检测单元用于检测所述第一发光列和/或所述第二发光列的发光亮度，并根据所述发光亮度生成所述检测电流，所述亮度检测单元的输出端输出所述检测电流至所述比较单元，所述比较单元用于对所述检测电流进行采样以获得采样电流，并将所述采样电流与预设参考电流进行比较；
    当所述采样电流小于所述预设参考电流时，所述比较单元向所述开关控制单元输出第一反馈信号，所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端以及一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较单元向所述开关控制单元输出第二反馈信号，所述开关控制单元根据所述第二反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  9. 如权利要求8所述的背光模组，其中，所述比较单元包括比较器，所述比较器包括同相输入端、反相输入端以及比较输出端，所述同相输入端与所述亮度检测单元的输出端电连接，所述反相输入端接收所述预设参考电流，所述比较输出端与所述开关控制单元电连接，所述比较器通过所述同相输入端接收所述采样电流；
    当所述采样电流小于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第一反馈信号，使得所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第二反馈信号，使得所述开关控制单元根据所述第二反馈信 号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  10. 如权利要求9所述的背光模组，其中，所述比较单元还包括第一采样电阻以及第二采样电阻，所述第一采样电阻与所述第二采样电阻串联于所述亮度检测单元的输出端与接地端之间，所述同相输入端电连接于所述第一采样电阻与所述第二采样电阻之间，所述第一采样电阻与所述第二采样电阻采集所述亮度检测单元的输出端的电流并获得所述采样电流。
  11. 如权利要求8所述的背光模组，其中，所述开关单元包括多个第一晶体管、多个第二晶体管、多个第三晶体管以及多个第四晶体管，所述开关控制单元包括第一信号输出端以及第二信号输出端；
    所述第一晶体管的栅极与所述开关控制单元的第一信号输出端电连接，所述第一晶体管的源极与所述第一发光列的第二端电连接，所述第一晶体管的漏极与所述第二连接线电连接；
    所述第二晶体管的栅极与所述开关控制单元的第二信号输出端电连接，所述第二晶体管的源极与所述第一发光列的第二端电连接，所述第二晶体管的漏极与所述第一连接线电连接；
    所述第三晶体管的栅极与所述第一晶体管的栅极以及所述开关控制单元的第一信号输出端电连接，所述第三晶体管的源极与所述第二发光列的第二端电连接，所述第三晶体管的漏极与所述第二连接线电连接；
    所述第四晶体管的栅极与所述第二晶体管的栅极以及所述开关控制单元的第二信号输出端电连接，所述第四晶体管的源极与所述第二发光列的第二端电连接，所述第四晶体管的漏极与所述第二晶体管的漏极电连接的同时还与所述第一连接线电连接。
  12. 如权利要求11所述的背光模组，其中，当所述开关控制单元接收所述第一反馈信号，所述开关控制单元根据所述第一反馈信号从所述第一信号输出端输出第一控制信号并从所述第二信号输出端输出第二控制信号，所述第一控制信号控制所述第一晶体管以及所述第三晶体管截止，所述第二控制信号控制所述第二晶体管以及所述第四晶体管导通；
    当所述开关控制单元接收所述第二反馈信号，所述开关控制单元根据所述第二反馈信号从所述第一信号输出端输出所述第二控制信号并从所述第二信号输出端输出所述第一控制信号，所述第一控制信号控制所述第二晶体管以及所 述第四晶体管截止，所述第二控制信号控制所述第一晶体管以及所述第三晶体管导通。
  13. 一种显示装置，其中，包括显示面板以及背光模组，所述显示面板位于所述背光模组的出光侧，所述显示面板在所述背光模组提供的背光源下显示图像，所述背光模组包括背板，所述背板包括第一固定板、第二固定板以及连接板，所述第一固定板以及所述第二固定板相对设置，所述连接板固定连接于所述第一固定板以及所述第二固定板之间，所述背光模组还包括多个第一发光列、多个第二发光列、第一电路板以及第二电路板以及背光驱动电路，其中，所述第一电路板设置于所述第一固定板面对所述第二固定板的一侧，所述第二电路板设置于所述第二固定板面对所述第一固定板的一侧，多个所述第一发光列以及多个所述第二发光列设置于所述第一电路板与所述第二电路板之间，所述背光驱动电路包括供能模块以及电流调节模块，所述供能模块设置于所述第一电路板上，所述电流调节模块设置于所述第二电路板上，所述背光驱动电路包括用于向并联的多个所述第一发光列以及并联的多个所述第二发光列提供电源信号的供能模块，所述背光驱动电路还包括电流调节模块、多个第一连接线以及多个第二连接线，其中，所述供能模块与多个所述第一发光列的第一端以及多个所述第二发光列的第一端电连接，所述电流调节模块同时与多个所述第一发光列的第二端以及多个所述第二发光列的第二端电连接，所述电流调节模块选择性地通过多个所述第一连接线或多个所述第二连接线与所述供能模块电连接，所述电流调节模块用于检测所述第一发光列和/或所述第二发光列的发光亮度以获得检测电流，并将所述检测电流与模式切换电流比较；
    当所述检测电流小于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；当所述检测电流大于或等于所述模式切换电流时，所述电流调节模块控制一个所述第一发光列的第二端与一个所述第二连接线电连接以及控制一个第二发光列的第二端与一个所述第二连接线电连接。
  14. 如权利要求13所述的显示装置，其中，所述电流调节模块包括亮度检测单元、比较单元、开关控制单元以及开关单元，所述亮度检测单元的输出端与所述比较单元电连接，所述比较单元与所述开关控制单元电连接，所述开关控制单元还与所述开关单元电连接，其中，
    所述亮度检测单元用于检测所述第一发光列和/或所述第二发光列的发光亮 度，并根据所述发光亮度生成所述检测电流，所述亮度检测单元的输出端输出所述检测电流至所述比较单元，所述比较单元用于对所述检测电流进行采样以获得采样电流，并将所述采样电流与预设参考电流进行比较；
    当所述采样电流小于所述预设参考电流时，所述比较单元向所述开关控制单元输出第一反馈信号，所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端以及一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较单元向所述开关控制单元输出第二反馈信号，所述开关控制单元根据所述第二反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  15. 如权利要求14所述的显示装置，其中，所述比较单元包括比较器，所述比较器包括同相输入端、反相输入端以及比较输出端，所述同相输入端与所述亮度检测单元的输出端电连接，所述反相输入端接收所述预设参考电流，所述比较输出端与所述开关控制单元电连接，所述比较器通过所述同相输入端接收所述采样电流；
    当所述采样电流小于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第一反馈信号，使得所述开关控制单元根据所述第一反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二发光列的第二端同时与一个所述第一连接线电连接；
    当所述采样电流大于或等于所述预设参考电流时，所述比较输出端向所述开关控制单元输出第二反馈信号，使得所述开关控制单元根据所述第二反馈信号控制所述开关单元将一个所述第一发光列的第二端与一个所述第二连接线电连接以及将一个所述第二发光列的第二端与一个所述第二连接线电连接。
  16. 如权利要求15所述的显示装置，其中，所述比较单元还包括第一采样电阻以及第二采样电阻，所述第一采样电阻与所述第二采样电阻串联于所述亮度检测单元的输出端与接地端之间，所述同相输入端电连接于所述第一采样电阻与所述第二采样电阻之间，所述第一采样电阻与所述第二采样电阻采集所述亮度检测单元的输出端的电流并获得所述采样电流。
  17. 如权利要求14所述的显示装置，其中，所述开关单元包括多个第一晶体管、多个第二晶体管、多个第三晶体管以及多个第四晶体管，所述开关控制 单元包括第一信号输出端以及第二信号输出端；
    所述第一晶体管的栅极与所述开关控制单元的第一信号输出端电连接，所述第一晶体管的源极与所述第一发光列的第二端电连接，所述第一晶体管的漏极与所述第二连接线电连接；
    所述第二晶体管的栅极与所述开关控制单元的第二信号输出端电连接，所述第二晶体管的源极与所述第一发光列的第二端电连接，所述第二晶体管的漏极与所述第一连接线电连接；
    所述第三晶体管的栅极与所述第一晶体管的栅极以及所述开关控制单元的第一信号输出端电连接，所述第三晶体管的源极与所述第二发光列的第二端电连接，所述第三晶体管的漏极与所述第二连接线电连接；
    所述第四晶体管的栅极与所述第二晶体管的栅极以及所述开关控制单元的第二信号输出端电连接，所述第四晶体管的源极与所述第二发光列的第二端电连接，所述第四晶体管的漏极与所述第二晶体管的漏极电连接的同时还与所述第一连接线电连接。
  18. 如权利要求17所述的显示装置，其中，当所述开关控制单元接收所述第一反馈信号，所述开关控制单元根据所述第一反馈信号从所述第一信号输出端输出第一控制信号并从所述第二信号输出端输出第二控制信号，所述第一控制信号控制所述第一晶体管以及所述第三晶体管截止，所述第二控制信号控制所述第二晶体管以及所述第四晶体管导通；
    当所述开关控制单元接收所述第二反馈信号，所述开关控制单元根据所述第二反馈信号从所述第一信号输出端输出所述第二控制信号并从所述第二信号输出端输出所述第一控制信号，所述第一控制信号控制所述第二晶体管以及所述第四晶体管截止，所述第二控制信号控制所述第一晶体管以及所述第三晶体管导通。
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