WO2021169739A1 - 背光驱动系统、显示装置和背光驱动板卡 - Google Patents

背光驱动系统、显示装置和背光驱动板卡 Download PDF

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Publication number
WO2021169739A1
WO2021169739A1 PCT/CN2021/074699 CN2021074699W WO2021169739A1 WO 2021169739 A1 WO2021169739 A1 WO 2021169739A1 CN 2021074699 W CN2021074699 W CN 2021074699W WO 2021169739 A1 WO2021169739 A1 WO 2021169739A1
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WIPO (PCT)
Prior art keywords
backlight
backlight driving
board
boards
power
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Application number
PCT/CN2021/074699
Other languages
English (en)
French (fr)
Inventor
管恩慧
王志懋
张晓�
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US17/425,473 priority Critical patent/US11620957B2/en
Publication of WO2021169739A1 publication Critical patent/WO2021169739A1/zh

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    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20Control 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
    • G09G3/34Control 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
    • G09G3/3406Control of illumination source
    • G09G3/342Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05KPRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K7/00Constructional details common to different types of electric apparatus
    • H05K7/20Modifications to facilitate cooling, ventilating, or heating
    • H05K7/20954Modifications to facilitate cooling, ventilating, or heating for display panels
    • H05K7/20963Heat transfer by conduction from internal heat source to heat radiating structure
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00Control of display operating conditions
    • G09G2320/02Improving the quality of display appearance
    • G09G2320/0233Improving the luminance or brightness uniformity across the screen
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02Details of power systems and of start or stop of display operation
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/04Display protection
    • G09G2330/045Protection against panel overheating
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09GARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/06Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation

Definitions

  • the present disclosure relates to the field of display technology, in particular to a backlight system, a display device and a backlight driving board.
  • the backlight driving system is usually provided with a backlight driving board, and the backlight driving board is usually arranged in the middle of the display screen.
  • the backlight driving board is electrically connected with the backlight unit arranged on the edge or the back of the display screen through the backlight driving line, so as to realize the enable control and brightness adjustment of the backlight unit.
  • the present disclosure provides a backlight driving system, a display device and a backlight driving board.
  • the present disclosure discloses a backlight driving system for a display device, the display device including a display screen and a plurality of backlight units, wherein the backlight driving system includes:
  • the plurality of backlight units are electrically connected;
  • the control board is used to output an enable control signal and a brightness adjustment signal to the plurality of backlight driving boards to control the plurality of backlight driving boards to drive the plurality of backlight units to achieve enable control and brightness adjust.
  • the backlight driving system further includes: a plurality of power supply boards, each of the plurality of power supply boards is connected to at least one of the plurality of backlight driving boards that are located adjacent to each other through a power connection line.
  • the connection is used to supply power to the backlight driving board, and each of the plurality of backlight driving boards is electrically connected to one of the plurality of power supply boards.
  • the backlight driving system further includes: a switching power supply board, the switching power supply board is electrically connected to each of the plurality of power supply board cards, and is used to connect a voltage signal to the A power supply board for power supply control.
  • control board is electrically connected to each of the plurality of backlight driving boards through an enable signal line and a brightness signal line, the enable signal line is used to transmit an enable control signal, and the The brightness signal line is used to transmit the brightness adjustment signal;
  • the enabling signal line of the control board connected to the plurality of backlight driving boards has the same length as the brightness signal line.
  • control board is electrically connected to one of the plurality of power supply boards, and when the control board receives the power input of the power supply board, the enable control signal is output And the brightness adjustment signal;
  • the backlight driving board is activated upon receiving the power input, the enable control signal, and the brightness adjustment signal.
  • the plurality of backlight driving boards are separately arranged on both sides of the display screen, and the plurality of power supply boards are arranged close to both sides of the display screen, and are respectively electrically connected to the backlight driving boards, so
  • the control board is arranged in the central area of the display screen.
  • the backlight driving system includes 4 backlight driving boards and 2 power supply boards; wherein,
  • the 4 backlight driving boards are respectively arranged close to the 4 top corners of the display screen.
  • Each of the plurality of power supply boards is electrically connected to the two adjacent backlight driving boards.
  • the backlight driver board is provided with a power interface, a control interface and a backlight interface.
  • control board is a field programmable logic gate array.
  • the display device includes a plurality of display screens, a plurality of backlight driving boards are provided on the edge of each of the plurality of display screens, and the control board in the backlight driving system and the The plurality of backlight driving boards on each of the plurality of display screens are connected.
  • the power board is controlled to simultaneously output power to the control board and the backlight drive board that is electrically connected to the power board.
  • the control board can only output the enable control signal and the brightness adjustment signal to the backlight drive board when it receives the power input from the power board.
  • Each backlight drive board can only output the enable control signal and the brightness adjustment signal when it receives It starts only when the power input to the power board, the enable control signal of the control board, and the brightness adjustment signal.
  • the embodiments of the present disclosure also disclose a display device, wherein the display device includes: a display screen, a plurality of backlight units, and the above-mentioned backlight driving system; wherein,
  • the plurality of backlight driving boards in the backlight driving system are separately arranged on the edge of the display screen;
  • the plurality of backlight driving boards are electrically connected to the plurality of backlight units through the backlight driving line.
  • the implementation of the present disclosure also discloses a backlight driving board for the above-mentioned backlight driving system, wherein the backlight driving board includes: a substrate and a plurality of heating devices, and the plurality of heating devices are arranged in the On the substrate, the substrate is provided with a heat dissipation layer at a position opposite to the plurality of heating devices, the plurality of heating devices are arranged in a straight line, and the plurality of heat dissipation layers are connected as a whole.
  • the substrate includes a first side and a second side opposed to each other, and the plurality of heating devices are disposed on the first side;
  • a first opening is provided on the first side, so that a part of the heat dissipation layer opposite to the first opening is exposed.
  • a second opening is provided on the second side, so that a part of the heat dissipation layer opposite to the second opening is exposed.
  • the heating device includes at least one of a field effect tube, a diode, and an inductor.
  • At least two ground layers are provided in the substrate.
  • FIG. 1 is a schematic structural diagram of a backlight driving system according to an embodiment of the present disclosure.
  • FIG. 2 is a schematic structural diagram of a backlight driving board according to an embodiment of the present disclosure
  • the embodiments of the present disclosure provide a backlight driving system, the backlight driving system may be used in a display device, the display device may include a display screen and a plurality of backlight units, the backlight driving system may be used to implement the backlight unit Enable control and brightness adjustment.
  • the back specifically may include: a control board 10 and a plurality of backlight driving boards 11 electrically connected to the control board 10.
  • a backlight driving board 11 is separately arranged on the edge of the display screen 20, and the backlight driving board 11 is electrically connected to the backlight unit (not shown in the figure) through a backlight driving line 111.
  • control board 10 can be used to control the backlight drive board 11 to drive the multiple backlight units to work through the backlight drive board 11; the control board 10 can be used to output enable control to the backlight drive board 11
  • the signal and the brightness adjustment signal are used to control the backlight driving board 11 to drive the plurality of backlight units to realize enable control and brightness adjustment.
  • the backlight driver board 11 is usually arranged on the front of the display screen 20, and the backlight unit is usually arranged on the edge or the back of the screen. Therefore, the backlight drive line on the backlight driver board 11 on the front of the display screen 20 111 usually needs to turn over the edge of the display screen 20 to be electrically connected to the backlight unit located on the back of the display screen 20 to realize the enable control and brightness adjustment of the backlight unit.
  • the backlight unit may be a backlight.
  • the enabling control may include at least turning on and off control of the backlight unit, and the brightness adjustment control may include at least brightness adjustment of the backlight unit.
  • the backlight driving system since the backlight driving system includes a plurality of backlight driving boards 11, the plurality of backlight driving boards 11 are separately arranged on the edge of the display screen 20, and the backlight unit is usually arranged on the edge or the back of the display screen 20, Therefore, the distance between the backlight driving board 11 and the backlight unit is relatively short. In this way, the length of the backlight driving line 111 between the backlight driving board 11 and the backlight unit can be shortened, the electromagnetic interference of the backlight driving line 111 during signal transmission can be reduced, and the stability of the backlight driving system can be improved. sex.
  • multiple backlight drive boards 11 can be used to realize the enable control and brightness adjustment of multiple backlight units, and the coordinated switching between multiple backlight drive boards 11 can improve multiple
  • the display uniformity of the backlight unit can also reduce the number of electronic components on a single backlight driving board 11 and the heat dissipation effect is better. Furthermore, the heat dissipation effect of the backlight driving system can be better.
  • the display device may also include a plurality of display screens 20, and a plurality of backlight driving boards 11 are arranged on the edge of each display screen 20.
  • the control board 10 in the backlight driving system and each display The backlight driving board 11 on the screen 20 is connected to realize the backlight control of the multiple display screens 20 in the display device.
  • FIG. 1 only shows the case where the display device includes one display screen 20, and in the case where the display device includes multiple display screens 20, the execution can be performed with reference to FIG. 1, and will not be repeated here.
  • FIG. 1 only shows the case where the backlight driving system includes 4 backlight driving boards 11, and the 4 backlight driving boards 11 are respectively arranged close to the 4 top corners of the display screen 20.
  • the number of backlight driver boards 11 can be 3, 6, or 8, etc.
  • the embodiments of the present disclosure The specific number of backlight driving boards 11 may not be limited.
  • the backlight driving board 11 may be provided with a backlight driving line 111 for electrically connecting with the backlight unit, and the specific position of the backlight driving line 111 may be set according to actual conditions.
  • the backlight drive line 111 can be arranged at the upper end, lower end, left end or right end of the backlight drive board 11.
  • the embodiment of the present disclosure provides for the backlight drive line 111 on the backlight drive board 11 The specific location does not need to be limited.
  • each backlight drive board 11 can be used to drive 12 backlight units.
  • the backlight drive system includes 4 backlight drive boards 11, the backlight drive system can be used to drive 12 backlight units. 48 backlight units.
  • one backlight driving board is used to drive 48 backlight units.
  • the number of electronic components on the backlight driving board 11 is small, and the heat dissipation effect is better. Therefore, the heat dissipation effect of the backlight driving system can be better.
  • the backlight driver board 11 needs to drive fewer backlight units, so that the number of inductances on the backlight driver board 11 is less, so that the resonance generated by the backlight driver board 11 can be reduced, and further, the backlight driver can be reduced. Noise when the board 11 is running.
  • the backlight driver boards 11 are usually provided with a backlight driver chip, peripheral circuits, clock circuits, and The corresponding control circuit realizes the automatic switching of the multiple channels in the backlight driving circuit. Therefore, the display uniformity of the plurality of backlight units can be improved through the coordinated switching among the plurality of backlight driving boards 11.
  • the backlight driving board 11 in the upper left corner when the brightness of the backlight unit controlled by the backlight driving board 11 in the upper left corner is low, it can be switched and coordinated with other backlight driving boards 11 to control the backlight unit, so that all The brightness of all the separate light units in the display device is relatively uniform, which improves the display effect of the display device.
  • the backlight driving system may further include a power supply component, and the power supply component supplies power to the control board 10 and a plurality of backlight driving boards 11 respectively.
  • the power supply assembly may include a plurality of power supply boards 12, and the power supply board 12 may be used to supply power to the control board 10 and the backlight driving board 11.
  • the power supply assembly may also include a switching power supply board 13, and the switching power supply board 13 may Used to transfer external power to the power board 12.
  • the backlight driving system may further include a plurality of power supply boards 12, and each power supply board 12 is electrically connected to at least one adjacent backlight driving board 11 through a power connection line 121, and is used for supplying the backlight driving board to the 11 provides power, and each backlight driving board 11 is electrically connected to a power board 12.
  • the backlight driving system since the backlight driving system includes multiple power supply boards 12, it is convenient to place the power supply boards 12 close to the backlight driving board 11, reducing the power supply boards 12 and the backlight driving board.
  • the length of the power connection line 121 between the cards 11 reduces the electromagnetic interference of the power connection line 121 during electrical signal transmission, and improves the stability of the backlight driving system.
  • the backlight driving board 11 adjacent to the power board 12 may be the backlight driving board 11 close to the power board 12.
  • the backlight driver board 11 near the power board 12 on the left is the backlight driver board 11 in the upper left and lower left corners. Therefore, the power board 12 can be connected to the upper left and lower left corners.
  • the backlight driving board 11 is electrically connected to shorten the length of the power connection line 121 between the power supply board 12 and the backlight driving board 11, reduce the electromagnetic interference of the power connection line 121 during electrical signal transmission, and improve the overall performance. The stability of the backlight drive system is described.
  • the backlight driving system may include 4 backlight driving boards 11 and 2 power supply boards 12, and the 4 backlight driving boards 11 may be respectively arranged close to the 4 top corners of the display screen 20, each The power board 12 is electrically connected to the two adjacent backlight drive boards 12 to shorten the length of the power connection line 121 between the power board 12 and the backlight drive board 11 and reduce the length of the power connection line 121. Electromagnetic interference during electrical signal transmission.
  • the number of power supply boards 12 can be based on the backlight driving board 11
  • the number of power boards 12 may be 3, 5, or 6, etc.
  • the specific number of power boards 12 may not be limited in the embodiment of the present disclosure.
  • the backlight driving system may further include: a switching power supply board 13, which is electrically connected to each power supply board 12, and is used to connect a voltage signal and supply power to a plurality of power supply boards 12 control.
  • the power adapter board 13 can be used to convert the original AC power into multiple outputs, and the multiple outputs can be used as inputs for multiple power boards 12. In practical applications, the power adapter board 13 can be used to convert the original AC power into the AC power required by the power board 12 and filter the original AC power.
  • control board 10 can be electrically connected to each backlight driver board 11 through the enable signal line 101 and the brightness signal line 102.
  • the enable signal line 101 can be used to transmit the enable control signal
  • the brightness signal line 102 can be used to transmit a brightness adjustment signal.
  • the enable control signal may be an EN (Enable) signal, and the enable control signal may be used to control the turning on and off of the backlight unit.
  • the brightness adjustment signal may be Pulse Width Modulation (PWM), and the brightness adjustment signal may be used to adjust the brightness of the backlight unit.
  • control board 10 can be arranged between a plurality of backlight drive boards 11, so that the distance between the control board 10 and each backlight drive board 11 is relatively close, so that the control board The lengths of the enable control line 101 and the brightness signal line 102 between 10 and each backlight driver board 11 are relatively close, so as to improve the synchronization of the activation of multiple backlight driver boards 11, thereby improving the display device Synchronization of backlight unit activation.
  • the control board 10 is arranged between the plurality of backlight driver boards 11, specifically: the control board 10 is arranged at the edge of the display screen 20 Central area. In this way, the distance between each backlight driving board 11 of the control board 10 is relatively close.
  • control board card 10 is electrically connected to the enable signal line 101 of each backlight driving board card 11 with the same length, and the brightness signal line 102 has the same length.
  • the control board 10 when the control board 10 is electrically connected to the enable signal line 101 of each backlight driver board 11 and the brightness signal line 102 is the same length, the control board 10 outputs the enable control signal and the brightness
  • the adjustment signal can reach each backlight driver board 11 at the same time, and control each backlight driver board 11 to start at the same time, and realize the simultaneous startup and brightness adjustment of the backlight unit through the simultaneous activation of each backlight driver board 11, so that The display effect of the display device can be improved.
  • control board 10 is electrically connected to a power board 12, and when the control board 10 receives the power input of the power board 12, the enable control signal is output And the brightness adjustment signal; the backlight driver board 11 starts to work after receiving the power input, the enable control signal, and the brightness adjustment signal.
  • the power board 12 can be controlled to simultaneously output power to the control board 10, and the backlight driver board 11 electrically connected to the power board 12, and the control board 10 Only when the power input of the power board 12 is received, the enable control signal and the brightness adjustment signal can be output to the backlight driving board 11.
  • Each backlight driver board 11 is activated only when it receives the power input of the power board 12, the enable control signal of the control board 10, and the brightness adjustment signal. In this way, multiple The backlight driver board 11 is activated synchronously.
  • FIG. 1 only shows the case where the control board 10 is electrically connected to the adjacent power board 12, but in practical applications, the control board 10 can be electrically connected to any power board 12 Connection, that is, the control board 10 can also be electrically connected with another power board 12, which is not specifically limited in the embodiment of the present disclosure.
  • control board 10 may be a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • ASIC application-specific integrated circuits
  • a plurality of backlight driving boards 11 may be separately arranged on both sides of the display screen 20, for example, the left and right sides of the display screen shown in FIG. 1.
  • a plurality of power supply boards 12 can be arranged close to both sides of the display screen 20, and are respectively electrically connected to the backlight drive board 11, so that the power connection line 121 between the power supply board 12 and the backlight drive board 11 is as short as possible, and reduced The electromagnetic interference suffered by the small power connection line 121 affects the stability of power transmission.
  • the backlight driver board 11 may be provided with a power interface, a control interface, and a backlight interface.
  • the power interface can be used to connect to the power connection line 121 of the power board 12
  • the control interface can be used to connect to the enable signal line 101 and the brightness signal line 102
  • the backlight interface can be used to connect to all The backlight unit is connected.
  • the backlight driving system described in the embodiments of the present disclosure may at least include the following advantages:
  • the backlight driving system since the backlight driving system includes a plurality of backlight driving boards, the plurality of backlight driving boards are separately arranged on the edge of the display screen, and the backlight unit is usually arranged on the edge or the back of the display screen. Therefore, The distance between the backlight driving board and the backlight unit is relatively short. In this way, the length of the backlight drive line between the backlight drive board and the backlight unit can be shortened, the electromagnetic interference of the backlight drive line during signal transmission can be reduced, and the stability of the backlight drive system can be improved. . Moreover, in the backlight drive system, the enabling control and brightness adjustment of multiple backlight units can be realized through multiple backlight drive boards, and the coordinated switching between multiple backlight drive boards can improve multiple backlight units. The display uniformity of the backlight driving system can be reduced, and the electronic components on a single backlight driving board can be reduced, and the heat dissipation effect can be better. Furthermore, the heat dissipation effect of the backlight driving system can be better.
  • the embodiments of the present disclosure also provide a display device, which may include a display screen, a plurality of backlight units, and the above-mentioned backlight driving system; wherein, the plurality of backlight driving boards in the backlight driving system are separately arranged in the The edge of the display screen; the plurality of backlight driving boards and the plurality of backlight units are electrically connected through the backlight driving line.
  • the backlight driving system since the backlight driving system includes a plurality of backlight driving boards, the plurality of backlight driving boards are separately arranged on the edge of the display screen, and the backlight unit is usually arranged on the edge or the back of the display screen. Therefore, The distance between the backlight driving board and the backlight unit is relatively short. In this way, the length of the backlight drive line between the backlight drive board and the backlight unit can be shortened, the electromagnetic interference of the backlight drive line during signal transmission can be reduced, and the stability of the backlight drive system can be improved. . Moreover, in the backlight drive system, the enabling control and brightness adjustment of multiple backlight units can be realized through multiple backlight drive boards, and the coordinated switching between multiple backlight drive boards can improve multiple backlight units. The display uniformity of the backlight driving system can be reduced, and the electronic components on a single backlight driving board can be reduced, and the heat dissipation effect can be better. Furthermore, the heat dissipation effect of the backlight driving system can be better.
  • the embodiment of the present disclosure also provides a backlight driving board used in the above-mentioned backlight driving system.
  • the backlight driving board may specifically include: a substrate 30 and a plurality of heating devices 31.
  • the device 31 is arranged on the substrate 30, and the substrate 30 is provided with a heat dissipation layer at a position opposite to the heating device 31.
  • the plurality of heating devices 31 are arranged in a straight line, and the plurality of heat dissipation layers are connected as a whole.
  • the substrate 30 may be provided with a heat dissipation layer at a position opposite to the heating device 31, and the heat dissipation layer may be used to dissipate the heat generated by the heating device 31.
  • the heat dissipation layer may be a copper layer or other metal layers, and the specific material of the heat dissipation layer may not be limited in the embodiments of the present disclosure.
  • the plurality of heat dissipation layers corresponding to the plurality of heating devices 31 can be connected into a whole, and the area of the heat dissipation layer after being connected as a whole can be larger.
  • the heat dissipation effect of the thermal conductive layer can be better.
  • the heating device 31 may include at least one of a field effect transistor 311, a diode 312, and an inductor 313, and the specific type of the heating device 31 may not be limited in the embodiment of the present disclosure.
  • the field effect transistor 311, the diode 312, and the inductor 313 can be connected in a straight line (dotted frame), so that their respective corresponding heat dissipation layers are connected as a whole.
  • the substrate 30 may include a first side and a second side opposite to each other, and the heating device 31 is provided on the first side; the first side is provided with a first opening 301 so that the heat dissipation layer The part opposite to the first opening 301 is exposed, which further improves the heat dissipation effect of the heat dissipation layer.
  • the first opening 301 should avoid the pin position of the thermal device 31 to avoid affecting the connection of the heating device 31 on the heat dissipation layer.
  • the size of the first opening 301 can be set to a specific shape and size according to actual conditions.
  • the shape and size of the first opening 301 can be determined with reference to the size and shape of the pad of the field effect tube, and the shape and area of the first opening 301 can be substantially the same as the pad.
  • the heat generating device 31 can effectively dissipate heat, and the power supply hazard caused by the exposure of the heat dissipation layer can be avoided.
  • a second opening 302 may be provided on the second side, so that a portion of the heat dissipation layer opposite to the second opening 302 is exposed, which further improves the heat dissipation effect of the heat dissipation layer.
  • the second opening 302 may be arranged at a position opposite to the heating device 31, or may be arranged to avoid the development of the heating device 31.
  • the specific position of the second opening 302 may not be limited in the embodiment of the present disclosure.
  • the shape of the first opening 301 and the second opening 302 may be a circle, a rectangle, a polygon, etc.
  • the specific shape of the first opening 301 and the second opening 302 may not be limited in the embodiment of the present disclosure.
  • At least two ground layers may be provided in the substrate 30 to further improve the heat dissipation effect of the backlight driving board.
  • the backlight driver board can use the heat dissipation layer on the substrate 10, the first opening 301, the second opening 302, and at least two conductive layers to dissipate heat to achieve board-level heat dissipation. In this way, it is possible to avoid reserving connection ports for the fan and the heat sink on the substrate 30, which can effectively reduce the area of the backlight driving board.
  • the backlight driver board may further include: a power interface 303, a control interface 304, and a backlight interface 305.
  • the power interface 303 can be connected to the power supply line of the power board for inputting power
  • the control interface 304 can be connected to the enable signal line and the brightness signal line of the control board for access to enable control Signal and brightness adjustment signal
  • the backlight interface 305 can be connected to the backlight unit in the display device, and is used to output a backlight control signal to the backlight unit.
  • the power interface 303 and the control interface 304 can be arranged at one end of the base board 30 close to the control board and the power board, so that the power interface 303 is connected to the power board and the control interface 304 is connected to the power board.
  • the control board is connected.
  • the backlight interface 305 can be arranged at one end of the substrate 30 close to the backlight unit, so as to shorten the length of the backlight driving line between the backlight interface 305 and the backlight unit as much as possible, and improve the driving stability of the backlight unit. .
  • the backlight driver board described in the embodiments of the present disclosure may at least include the following advantages:
  • the plurality of heat dissipation layers corresponding to the plurality of heating devices can be connected into a whole, and the area of the heat dissipation layer after being connected as a whole can be larger.
  • the heat dissipation effect of the thermal conductive layer can be better.
  • the device embodiments described above are merely illustrative.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in One place, or it can be distributed to multiple network units.
  • Some or all of the modules can be selected according to actual needs to achieve the objectives of the solutions of the embodiments. Those of ordinary skill in the art can understand and implement it without creative work.
  • any reference signs placed between parentheses should not be constructed as a limitation to the claims.
  • the word “comprising” does not exclude the presence of elements or steps not listed in the claims.
  • the word “a” or “an” before an element does not exclude the presence of multiple such elements.
  • the present disclosure can be realized by means of hardware including several different elements and by means of a suitably programmed computer. In the unit claims listing several devices, several of these devices may be embodied in the same hardware item. The use of the words first, second, and third, etc. do not indicate any order. These words can be interpreted as names.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Planar Illumination Modules (AREA)
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Abstract

一种背光驱动系统、显示装置和背光驱动板卡,涉及显示技术领域。所述背光驱动系统用于显示装置,所述显示装置包括显示屏(20)和多个背光单元,所述背光驱动系统包括:控制板卡(10)和与所述控制板卡(10)电连接的多个背光驱动板卡(11),所述多个背光驱动板卡(11)分设于所述显示屏(20)的边缘,所述多个背光驱动板卡(11)通过背光驱动线(111)与所述多个背光单元电连接;所述控制板卡(10)用于向所述多个背光驱动板卡(11)输出使能控制信号和亮度调节信号,以控制所述多个背光驱动板卡(11)驱动所述多个背光单元,实现使能控制和亮度调节。

Description

背光驱动系统、显示装置和背光驱动板卡
相关申请的交叉引用
本公开要求在2020年02月24日提交中国专利局、申请号为202020204080.3、名称为“一种背光驱动系统、显示装置和背光驱动板卡”的中国专利申请的优先权,其全部内容通过引用结合在本公开中。
技术领域
本公开涉及显示技术领域,特别是涉及一种背光系统、一种显示装置和一种背光驱动板卡。
背景技术
随着显示技术的发展,用户对于显示装置的显示要求也越来越高,相应的,用户对显示装置上的背光驱动系统的性能要求也越来越高。
相关技术中,背光驱动系统通常设置有一个背光驱动板卡,该背光驱动板卡通常设置在显示屏的偏中部的位置。该背光驱动板卡通过背光驱动线与设置于显示屏边缘或者背面的背光单元电连接,以实现背光单元的使能控制和亮度调节。
概述
本公开提供一种背光驱动系统、显示装置和背光驱动板卡。
第一方面,本公开公开了一种背光驱动系统,用于显示装置,所述显示装置包括显示屏和多个背光单元,其中,所述背光驱动系统包括:
控制板卡和与所述控制板卡电连接的多个背光驱动板卡,所述多个背光驱动板卡分设于所述显示屏的边缘,所述多个背光驱动板卡通过背光驱动线与所述多个背光单元电连接;并且
所述控制板卡用于向所述多个背光驱动板卡输出使能控制信号和亮度调节信号,以控制所述多个背光驱动板卡驱动所述多个背光单元,实现使能控制和亮度调节。
可选地,所述背光驱动系统还包括:多个电源板卡,所述多个电源板卡 中的每个通过电源连接线与位置邻近的所述多个背光驱动板卡中的至少一个电连接,用于给所述背光驱动板卡供电,所述多个背光驱动板卡中的每个与所述多个电源板卡中的一个电连接。
可选地,所述背光驱动系统还包括:转接电源板,所述转接电源板与所述多个电源板卡中的每个电连接,用于接入电压信号,并对所述多个电源板卡进行供电控制。
可选地,所述控制板卡通过使能信号线和亮度信号线与所述多个背光驱动板卡中的每个电连接,所述使能信号线用于传输使能控制信号,所述亮度信号线用于传输亮度调节信号;
其中,所述控制板卡连接到所述多个背光驱动板卡的所述使能信号线等长和所述亮度信号线等长。
可选地,所述控制板卡与所述多个电源板卡中的一个电连接,在所述控制板卡接收到所述电源板卡的电源输入的情况下,输出所述使能控制信号和所述亮度调节信号;并且
所述背光驱动板卡在接收到所述电源输入、所述使能控制信号和所述亮度调节信号的情况下启动。
可选地,所述多个背光驱动板卡分设于所述显示屏的两侧,所述多个电源板卡靠近所述显示屏的两侧设置,分别电连接所述背光驱动板卡,所述控制板卡设置于所述显示屏的中央区域。
可选地,所述背光驱动系统包括4个所述背光驱动板卡和2个所述电源板卡;其中,
所述4个背光驱动板卡分别靠近所述显示屏的4个顶角设置;并且
所述多个电源板卡中的每个分别与其位置临近的2个所述背光驱动板卡电连接。
可选地,所述背光驱动板卡上设置有电源接口、控制接口和背光接口。
可选地,所述控制板卡为现场可编程逻辑门阵列。
可选地,所述显示装置包括多个显示屏,所述多个显示屏中的每个的边缘设置有多个背光驱动板卡,所述背光驱动系统中的所述控制板卡与所述多个显示屏中的每个上的所述多个背光驱动板卡连接。
可选地,在需要启动所述背光驱动板卡时,所述电源板卡被控制同时输 出电源至所述控制板卡以及与所述电源板卡电连接的所述背光驱动板卡,所述控制板卡只有在接收到所述电源板卡的电源输入时,才能向所述背光驱动板卡输出所述使能控制信号和所述亮度调节信号,每个所述背光驱动板卡只有在接收到所述电源板卡的所述电源输入、所述控制板卡的所述使能控制信号、所述亮度调节信号的情况下才启动。
第二方面,本公开实施例还公开了一种显示装置,其中,所述显示装置包括:显示屏、多个背光单元以及上述背光驱动系统;其中,
所述背光驱动系统中的所述多个背光驱动板卡分设于所述显示屏的边缘;并且
所述多个背光驱动板卡与所述多个背光单元通过所述背光驱动线电连接。
第三方面,本公开实施还公开了一种用于上述背光驱动系统的背光驱动板卡,其中,所述背光驱动板卡包括:基板和多个发热器件,所述多个发热器件设置在所述基板上,所述基板在与所述多个发热器件相对的位置设置有散热层,所述多个发热器件呈直线排列,多个所述散热层连接成整体。
可选地,所述基板包括相对的第一侧和第二侧,所述多个发热器件设置于所述第一侧;并且
所述第一侧上设置有第一开口,以使得所述散热层与所述第一开口相对的部分外露。
可选地,所述第二侧上设置有第二开口,以使得所述散热层与所述第二开口相对的部分外露。
可选地,发热器件包括:场效应管、二极管以及电感中的至少一种。
可选地,所述基板内设置有至少两层接地层。
上述说明仅是本公开技术方案的概述,为了能够更清楚了解本公开的技术手段,而可依照说明书的内容予以实施,并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂,以下特举本公开的具体实施方式。
附图简述
为了更清楚地说明本公开实施例或相关技术中的技术方案,下面将对实施例或相关技术描述中所需要使用的附图作一简单地介绍,显而易见地,下面描述中的附图是本公开的一些实施例,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是本公开实施例的一种背光驱动系统的结构示意图;并且
图2是本公开实施例的一种背光驱动板卡的结构示意图;
详细描述
为使本公开实施例的目的、技术方案和优点更加清楚,下面将结合本公开实施例中的附图,对本公开实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例是本公开一部分实施例,而不是全部的实施例。基于本公开中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本公开保护的范围。
本公开实施例提供了一种背光驱动系统,所述背光驱动系统可以用于显示装置,所述显示装置可以包括显示屏和多个背光单元,所述背光驱动系统可以用于实现所述背光单元的使能控制和亮度调节。
参照图1,示出了本公开实施例的一种背光驱动系统的结构示意图,所述背具体可以包括:控制板卡10和与控制板卡10电连接的多个背光驱动板卡11,多个背光驱动板卡11分设于显示屏20的边缘,背光驱动板卡11通过背光驱动线111与所述背光单元(图中未示出)电连接。具体地,控制板卡10可以用于控制背光驱动板卡11,以通过背光驱动板卡11驱动所述多个背光单元工作;控制板卡10可以用于向背光驱动板卡11输出使能控制信号和亮度调节信号,以控制背光驱动板卡11驱动所述多个背光单元,实现使能控制和亮度调节。
在实际应用中,背光驱动板卡11通常设置在显示屏20的正面,所述背光单元通常设置在屏幕的边缘或者背面,因此,位于显示屏20正面的背光驱动板卡11上的背光驱动线111通常需要翻过显示屏20的边缘,去与位于显示屏20背面的所述背光单元电连接,实现所述背光单元的使能控制和亮度调节。具体地,所述背光单元可以为背光灯。所述使能控制至少可以包括所述背光单元的开启和关闭控制,所述亮度调节控制至少可以包括所述背光单元的明暗调节。
本公开实施例中,由于所述背光驱动系统包括多个背光驱动板卡11,多个背光驱动板卡11分设在显示屏20的边缘,而背光单元通常设置在显示屏 20的边缘或者背面,因此,背光驱动板卡11到所述背光单元之间的距离较短。这样,就可以减短背光驱动板卡11与所述背光单元之间的背光驱动线111的长度,减小背光驱动线111在进行信号传输时受到的电磁干扰,提高所述背光驱动系统的稳定性。而且,所述背光驱动系统中,可以通过多个背光驱动板卡11来实现多个背光单元的使能控制和亮度调节,通过多个背光驱动板卡11之间的协调切换,可以提高多个背光单元的显示均匀性,并且,可以使得单个背光驱动板卡11上的电子元器件较少,散热效果较好,进而,可以使得所述背光驱动系统的散热效果较好。
在实际应用中,所述显示装置还可以包括多个显示屏20,每一个显示屏20的边缘设置有多个背光驱动板卡11,所述背光驱动系统中的控制板卡10与每一显示屏20上的背光驱动板卡11连接,用于实现所述显示装置中的多个显示屏20的背光控制。图1中仅示出了所述显示装置中包括一个显示屏20的情况下,在所述显示装置中包括多个显示屏20的情况下,参照图1执行即可,在此不做赘述。
可以理解的是,图1中仅示出了所述背光驱动系统包括4个背光驱动板卡11的情况,且这4个背光驱动板卡11分别靠近显示屏20的4个顶角设置的情况下,而在实际应用中,本领域技术人员可以根据实际需要设置背光驱动板卡11的数量,例如,背光驱动板卡11的数量可以为3个、6个或者8个等,本公开实施例对于背光驱动板卡11的具体数量可以不做限定。
示例性地,如图1所示,所述背光驱动系统中可以采用4个背光驱动板卡11对所述背光单元进行控制。4个背光驱动板卡11可以分别设置在靠近显示屏20顶角的边缘位置。具体地,背光驱动板卡11上可以设置有用于与所述背光单元电连接的背光驱动线111,背光驱动线111的具体的位置可以根据实际情况进行设置。例如,为了尽可能的靠近所述背光单元,背光驱动线111可以设置于背光驱动板卡11的上端、下端、左端或者右端,本公开实施例对于背光驱动线111在背光驱动板卡11上的具体位置可以不做限定。
在实际应用中,每个背光驱动板卡11可以用于驱动12个背光单元,这样,在所述背光驱动系统包括4个背光驱动板卡11的情况下,所述背光驱动系统可以用于驱动48个背光单元。相对于传统的技术方案中,通过一个背光驱动板卡来驱动48个背光单元,本公开的背光驱动系统中,背光驱动板卡11 上的电子元器件的数量较少,散热效果较好,进而,可以使得所述背光驱动系统的散热效果较好。
而且,由于背光驱动板卡11需要驱动的背光单元的数目较少,背光驱动板卡11上的电感数目较少,这样,就可以减少背光驱动板卡11产生的共鸣,进而,可以减少背光驱动板卡11运行时的噪声。
在实际应用中,由于可以通过多个背光驱动板卡11来实现多个背光单元的使能控制和亮度调节,而背光驱动板卡11上通常是设置有背光驱动芯片、外围电路、时钟电路以及相应的控制电路来实现背光驱动电路中多通道的自动切换,因此,通过多个背光驱动板卡11之间的协调切换,可以提高多个背光单元的显示均匀性。
例如,在图1所示的背光驱动系统中,在左上角的背光驱动板卡11控制的背光单元的亮度较暗时,可以切换协调其他背光驱动板卡11来控制该背光单元,以使得所述显示装置中所有的别光单元的亮度较为均为,提高所述显示装置的显示效果。
本公开实施例中,所述背光驱动系统还可以包括电源组件,电源组件分别向控制板卡10和多个背光驱动板卡11供电。该电源组件可以包括多个电源板卡12,电源板卡12可以用于向控制板卡10、背光驱动板卡11供电,该电源组件还可以包括转接电源板13,转接电源板13可以用于将外部电源转接至电源板卡12上。
具体地,所述背光驱动系统还可以包括多个电源板卡12,每个电源板卡12通过电源连接线121与位置邻近的至少一个背光驱动板卡11电连接,用于给背光驱动板卡11供电,每个背光驱动板卡11与一个电源板卡12电连接。
在实际应用中,由于所述背光驱动系统中包括多个电源板卡12,这样,就可以方便将电源板卡12靠近背光驱动板卡11设置,减短电源板卡12与所述背光驱动板卡11之间的电源连接线121的长度,减小电源连接线121在进行电信号传输时受到的电磁干扰,提高所述背光驱动系统的稳定性。
具体地,与电源板卡12位置相邻的背光驱动板卡11可以为靠近该电源板卡12的背光驱动板卡11。例如,如图1所示,靠近左边的电源板卡12的背光驱动板11卡为左上角和左下角的背光驱动板卡11,因此,可以将该电源板卡12与左上角和左下角的背光驱动板卡11电连接,以减短电源板卡12与 背光驱动板卡11之间的电源连接线121的长度,减小电源连接线121在进行电信号传输时受到的电磁干扰,提高所述背光驱动系统的稳定性。
可选地,所述背光驱动系统可以包括4个背光驱动板卡11和2个所述电源板卡12,4个背光驱动板卡11可以分别靠近显示屏20的4个顶角设置,每个电源板卡12分别与其位置临近的2个背光驱动板卡12电连接,以以减短电源板卡12与背光驱动板卡11之间的电源连接线121的长度,减小电源连接线121在进行电信号传输时受到的电磁干扰。
可以理解的是,图1中,仅示出了有两个电源板卡12控制4个背光驱动板卡11的情况,而在实际应用中,电源板卡12的数量可以根据背光驱动板卡11的具体数量和具体位置进行设定,例如,电源板卡12的数量可以为3个、5个或者6个等,本公开实施例对于电源板卡12的具体数量可以不做限定。
具体地,所述背光驱动系统还可以包括:转接电源板13,转接电源板13与每个电源板卡12电连接,用于接入电压信号,并对多个电源板卡12进行供电控制。
在实际应用中,电源转接板13可以用于将原始交流电转换成多路输出,这多路输出可以做为多个电源板卡12的输入。在实际应用中,电源转接板13可以用于将原始交流电转换成电源板卡12需要的交流电,并对原始交流电进行过滤。
本公开实施例中,控制板卡10可以通过使能信号线101、亮度信号线102与每个背光驱动板卡11电连接,使能信号线101可以用于传输使能控制信号,亮度信号线102可以用于传输亮度调节信号。
具体地,所述使能控制信号可以为EN(Enable)信号,所述使能控制信号可以用于控制背光单元的开启和关闭。所述亮度调节信号可以为脉冲宽度调制(Pulse width modulation,PWM),所述亮度调节信号可以用于调节背光单元的明暗程度。
可选地,控制板卡10可以设置于多个背光驱动板卡11之间,以使得控制板卡10与每个背光驱动板卡11之间的距离较为接近,这样,就可以使得控制板卡10与每个背光驱动板卡11之间的使能控制线101、亮度信号线102的长度较为接近,以提高多个背光驱动板卡11的启动同步性,进而,可以提 高所述显示装置中背光单元的启动同步性。
在实际应用中,由于背光驱动板卡11设置于显示屏20的边缘,因此,控制板卡10设置在多个背光驱动板卡11之间具体可以为:控制板卡10设置在显示屏20的中央区域。以使得控制板卡10每个背光驱动板卡11之间的距离较为接近。
可选地,控制板卡10电连接到各背光驱动板卡11的使能信号线101等长,亮度信号线102等长。
在实际应用中,在控制板卡10电连接到各背光驱动板卡11的使能信号线101等长,亮度信号线102等长的情况下,控制板卡10输出的使能控制信号、亮度调节信号可以同时到达各背光驱动板卡11上,控制各背光驱动板卡11的同时启动,并通过各背光驱动板卡11的同时启动,来实现背光单元的同时启动和亮度调节,这样,就可以提高所述显示装置的显示效果。
在本公开的一种可选实施例中,控制板卡10与一个电源板卡12电连接,在控制板卡10接收到电源板卡12的电源输入的情况下,输出所述使能控制信号和所述亮度调节信号;背光驱动板卡11在接收到所述电源输入、所述使能控制信号和所述亮度调节信号的情况下开始工作。
在实际应用中,在需要启动背光驱动板卡11时,可以控制电源板卡12同时输出电源至控制板卡10、以及与该电源板卡12电连接的背光驱动板卡11,控制板卡10只有在接收到电源板卡12的电源输入时,才能向背光驱动板卡11输出所述使能控制信号和所述亮度调节信号。每个背光驱动板卡11只有在接收到电源板卡12的电源输入、控制板卡10的所述使能控制信号、所述亮度调节信号的情况下才启动,这样,就可以进一步提高多个背光驱动板卡11的启动同步性。
可以理解的是,图1中仅示出了控制板卡10与其位置相邻的电源板卡12电连接的情况下,而在实际应用中,控制板卡10可以与任意一个电源板卡12电连接,即控制板卡10还可以跟另外的电源板卡12电连接,本公开实施例对此不做具体限定。
具体地,控制板卡10可以为现场可编程逻辑门阵列(Field Programmable Gate Array,FPGA)。FPGA作为专用集成电路(ASIC)领域中的一种半定制电路而出现的,既解决了定制电路的不足,又克服了原有可编程器件门电 路数有限的缺点。
在本公开的一种可选实施例中,多个背光驱动板卡11可以分设于显示屏20的两侧,例如,图1所示的显示屏的左右两侧。多个电源板卡12可以靠近显示屏20的两侧设置,分别电连接背光驱动板卡11,以使电源板卡12与背光驱动板卡11之间的电源连接线121尽可能的短,减小电源连接线121所受的电磁干扰,体改电源传输的稳定性。
在实际应用中,背光驱动板卡11上可以设置有电源接口、控制接口和背光接口。其中,所述电源接口可以用于与电源板卡12的电源连接线121连接,所述控制接口可以用于与使能信号线101、亮度信号线102连接,所述背光接口可以用于与所述背光单元连接。
综上,本公开实施例所述的背光驱动系统至少可以包括以下优点:
本公开实施例中,由于所述背光驱动系统包括多个背光驱动板卡,所述多个背光驱动板卡分设在显示屏的边缘,而背光单元通常设置在显示屏的边缘或者背面,因此,所述背光驱动板卡到背光单元之间的距离较短。这样,就可以减短所述背光驱动板卡与所述背光单元之间的背光驱动线的长度,减小背光驱动线在进行信号传输时受到的电磁干扰,提高所述背光驱动系统的稳定性。而且,所述背光驱动系统中,可以通过多个背光驱动板卡来实现多个背光单元的使能控制和亮度调节,通过多个背光驱动板卡之间的协调切换,可以提高多个背光单元的显示均匀性,并且,可以使得单个背光驱动板卡上的电子元器件较少,散热效果较好,进而,可以使得所述背光驱动系统的散热效果较好。
本公开实施例还提供了一种显示装置,所述显示装置可以包括显示屏、多个背光单元以及上述背光驱动系统;其中,所述背光驱动系统中的多个背光驱动板卡分设于所述显示屏的边缘;所述多个背光驱动板卡与所述多个背光单元通过所述背光驱动线电连接。
本公开实施例中,由于所述背光驱动系统包括多个背光驱动板卡,所述多个背光驱动板卡分设在显示屏的边缘,而背光单元通常设置在显示屏的边缘或者背面,因此,所述背光驱动板卡到背光单元之间的距离较短。这样,就可以减短所述背光驱动板卡与所述背光单元之间的背光驱动线的长度,减小背光驱动线在进行信号传输时受到的电磁干扰,提高所述背光驱动系统的 稳定性。而且,所述背光驱动系统中,可以通过多个背光驱动板卡来实现多个背光单元的使能控制和亮度调节,通过多个背光驱动板卡之间的协调切换,可以提高多个背光单元的显示均匀性,并且,可以使得单个背光驱动板卡上的电子元器件较少,散热效果较好,进而,可以使得所述背光驱动系统的散热效果较好。
本公开实施例还提供了一种应用于上述背光驱动系统中的背光驱动板卡。
参照图2,示出了本公开实施例的一种背光驱动板卡的结构示意图,如图2所示,所述背光驱动板卡具体可以包括:基板30和多个发热器件31,多个发热器件31设置在基板30上,基板30在与发热器件31相对的位置设置有散热层,多个发热器件31呈直线排列,多个所述散热层连接成整体。
在实际应用中,基板30在与发热器件31相对的位置可以设置有散热层,所述散热层可以用于散发发热器件31产生的热量。具体地,所述散热层可以为铜层或者其他金属层,本公开实施例对于所述散热层的具体材质可以不做限定。
本公开实施例中,由于多个发热器件31呈直线排列,因此,多个发热器件31对应的多个散热层可以连接成整体,连接成整体后的散热层的面积可以较大,这样,就可以使得所述导热层的散热效果较好。
具体地,发热器件31可以包括:场效应管311、二极管312以及电感313中的至少一种,本公开实施例对于发热器件31的具体类型可以不做限定。场效应管311、二极管312以及电感313可以连成直线(虚线框),以便于其各自对应的散热层连接成整体。
本公开实施例中,基板30可以包括相对的第一侧和第二侧,发热器件31设置于所述第一侧;所述第一侧上设置有第一开口301,以使得所述散热层与第一开口301相对的部分外露,进一步提高所述散热层的散热效果。
需要说明的是,在实际应用中,第一开口301应该避开发热器件31的引脚位置,以避免影响发热器件31在所述散热层上的连接。
具体地,第一开口301的大小可以根据实际情况设置具体的形状和大小。例如,在发热器件31为场效应管的情况下,第一开口301的形状和大小可以参照场效应管的焊盘大小和形状来确定,第一开口301的形状与面积可以基本与该焊盘相同,这样,既可以使得发热器件31可以有效散热,又可以避免 所述散热层外露造成的供电危险。
可选地,所述第二侧上可以设置有第二开口302,以使得所述散热层与第二开口302相对的部分外露,进一步提高所述散热层的散热效果。
在实际应用中,第二开口302可以设置在与发热器件31相对的位置,也可以避开发热器件31的位置设置,本公开实施例对于第二开口302的具体位置可以不做限定。
可以理解的是,实际应用中,本领域技术人员可以根据实际需要设置第一开口301、第二开口302的形状。例如,第一开口301、第二开口302的形状可以为圆形、矩形或者多边形等,本公开实施例对于第一开口301、第二开口302的具体形状可以不做限定。
可选地,基板30内可以设置有至少两层接地层,以进一步提升所述背光驱动板卡的散热效果。
本公开实施例中,所述背光驱动板卡可以使用基板10上的散热层、第一开口301、第二开口302以及至少两层导电层散热,实现板级散热。这样,就可以避免在基板30上预留风扇和散热片的连接口,可有效的减小所述背光驱动板卡的面积。
在实际应用中,所述背光驱动板卡还可以包括:电源接口303、控制接口304和背光接口305。其中,电源接口303可以与所述电源板卡的电源连接线,用于输入电源;控制接口304可以与所述控制板卡的使能信号线和亮度信号线连接,用于接入使能控制信号和亮度调节信号;背光接口305可以与所述显示装置中的背光单元连接,用于向所述背光单元输出背光控制信号。。
可选地,电源接口303、控制接口304可以设置于基板30靠近所述控制板卡、所述电源板卡的一端,以便于电源接口303与所述电源板卡连接,以及控制接口304与所述控制板卡连接。背光接口305可以设置于基板30靠近所述背光单元的一端,以尽可能的减短背光接口305与所述背光单元之间的背光驱动线之间长度,提高对于所述背光单元的驱动稳定性。
综上,本公开实施例所述的背光驱动板卡至少可以包括以下优点:
本公开实施例中,由于多个发热器件呈直线排列,因此,所述多个发热器件对应的多个散热层可以连接成整体,连接成整体后的散热层的面积可以较大,这样,就可以使得所述导热层的散热效果较好。
最后,还需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者终端设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者终端设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者终端设备中还存在另外的相同要素。
以上对本公开所提供的一种背光驱动系统、一种显示装置以及一种背光驱动板卡,进行了详细介绍,本文中应用了具体个例对本公开的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本公开的方法及其核心思想;同时,对于本领域的一般技术人员,依据本公开的思想,在具体实施方式及应用范围上均会有改变之处,综上所述,本说明书内容不应理解为对本公开的限制。
以上所描述的装置实施例仅仅是示意性的,其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下,即可以理解并实施。
本文中所称的“一个实施例”、“实施例”或者“一个或者多个实施例”意味着,结合实施例描述的特定特征、结构或者特性包括在本公开的至少一个实施例中。此外,请注意,这里“在一个实施例中”的词语例子不一定全指同一个实施例。
在此处所提供的说明书中,说明了大量具体细节。然而,能够理解,本公开的实施例可以在没有这些具体细节的情况下被实践。在一些实例中,并未详细示出公知的方法、结构和技术,以便不模糊对本说明书的理解。
在权利要求中,不应将位于括号之间的任何参考符号构造成对权利要求的限制。单词“包含”不排除存在未列在权利要求中的元件或步骤。位于元 件之前的单词“一”或“一个”不排除存在多个这样的元件。本公开可以借助于包括有若干不同元件的硬件以及借助于适当编程的计算机来实现。在列举了若干装置的单元权利要求中,这些装置中的若干个可以是通过同一个硬件项来具体体现。单词第一、第二、以及第三等的使用不表示任何顺序。可将这些单词解释为名称。
最后应说明的是:以上实施例仅用以说明本公开的技术方案,而非对其限制;尽管参照前述实施例对本公开进行了详细的说明,本领域的普通技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改,或者对其中部分技术特征进行等同替换;而这些修改或者替换,并不使相应技术方案的本质脱离本公开各实施例技术方案的精神和范围。

Claims (17)

  1. 一种背光驱动系统,用于显示装置,所述显示装置包括显示屏和多个背光单元,其中,所述背光驱动系统包括:
    控制板卡和与所述控制板卡电连接的多个背光驱动板卡,所述多个背光驱动板卡分设于所述显示屏的边缘,所述多个背光驱动板卡通过背光驱动线与所述多个背光单元电连接;并且
    所述控制板卡用于向所述多个背光驱动板卡输出使能控制信号和亮度调节信号,以控制所述多个背光驱动板卡驱动所述多个背光单元,实现使能控制和亮度调节。
  2. 根据权利要求1所述的背光驱动系统,其中,所述背光驱动系统还包括:多个电源板卡,所述多个电源板卡中的每个通过电源连接线与位置邻近的所述多个背光驱动板卡中的至少一个电连接,用于给所述背光驱动板卡供电,所述多个背光驱动板卡中的每个与所述多个电源板卡中的一个电连接。
  3. 根据权利要求2所述的背光驱动系统,其中,所述背光驱动系统还包括:转接电源板,所述转接电源板与所述多个电源板卡中的每个电连接,用于接入电压信号,并对所述多个电源板卡进行供电控制。
  4. 根据权利要求2所述的背光驱动系统,其中,所述控制板卡通过使能信号线和亮度信号线与所述多个背光驱动板卡中的每个电连接,所述使能信号线用于传输使能控制信号,所述亮度信号线用于传输亮度调节信号;其中,所述控制板卡连接到所述多个背光驱动板卡的所述使能信号线等长和所述亮度信号线等长。
  5. 根据权利要求4所述的背光驱动系统,其中,所述控制板卡与所述多个电源板卡中的一个电连接,在所述控制板卡接收到所述电源板卡的电源输入的情况下,输出所述使能控制信号和所述亮度调节信号;并且
    所述背光驱动板卡在接收到所述电源输入、所述使能控制信号和所述亮度调节信号的情况下启动。
  6. 根据权利要求4所述的背光驱动系统,其中,所述多个背光驱动板卡分设于所述显示屏的两侧,所述多个电源板卡靠近所述显示屏的两侧设置,分别电连接所述背光驱动板卡,所述控制板卡设置于所述显示屏的中央区域。
  7. 根据权利要求2所述的背光驱动系统,其中,所述背光驱动系统包括 4个所述背光驱动板卡和2个所述电源板卡;其中,
    所述4个背光驱动板卡分别靠近所述显示屏的4个顶角设置;并且
    所述多个电源板卡中的每个分别与其位置临近的2个所述背光驱动板卡电连接。
  8. 根据权利要求1至7任一项所述的背光驱动系统,其中,所述背光驱动板卡上设置有电源接口、控制接口和背光接口。
  9. 根据权利要求1至8任一项所述的背光驱动系统,其中,所述控制板卡为现场可编程逻辑门阵列。
  10. 根据权利要求1至9任一项所述的背光驱动系统,所述显示装置包括多个显示屏,所述多个显示屏中的每个的边缘设置有多个背光驱动板卡,所述背光驱动系统中的所述控制板卡与所述多个显示屏中的每个上的所述多个背光驱动板卡连接。
  11. 根据权利要求4至10任一项所述的背光驱动系统,其中,在需要启动所述背光驱动板卡时,所述电源板卡被控制同时输出电源至所述控制板卡以及与所述电源板卡电连接的所述背光驱动板卡,所述控制板卡只有在接收到所述电源板卡的电源输入时,才能向所述背光驱动板卡输出所述使能控制信号和所述亮度调节信号,每个所述背光驱动板卡只有在接收到所述电源板卡的所述电源输入、所述控制板卡的所述使能控制信号、所述亮度调节信号的情况下才启动。
  12. 一种显示装置,其中,所述显示装置包括:显示屏、多个背光单元以及权利要求1至11任一项所述的背光驱动系统;其中,
    所述背光驱动系统中的所述多个背光驱动板卡分设于所述显示屏的边缘;并且
    所述多个背光驱动板卡与所述多个背光单元通过所述背光驱动线电连接。
  13. 一种用于权利要求1至11任一项所述的背光驱动系统的背光驱动板卡,其中,所述背光驱动板卡包括:基板和多个发热器件,所述多个发热器件设置在所述基板上,所述基板在与所述多个发热器件相对的位置设置有散热层,所述多个发热器件呈直线排列,多个所述散热层连接成整体。
  14. 根据权利要求13所述的背光驱动板卡,其中,所述基板包括相对的第一侧和第二侧,所述多个发热器件设置于所述第一侧;并且
    所述第一侧上设置有第一开口,以使得所述散热层与所述第一开口相对的部分外露。
  15. 根据权利要求14所述的背光驱动板卡,其中,所述第二侧上设置有第二开口,以使得所述散热层与所述第二开口相对的部分外露。
  16. 根据权利要求13所述的背光驱动板卡,其中,发热器件包括:场效应管、二极管以及电感中的至少一种。
  17. 根据权利要求13所述的背光驱动板卡,其中,所述基板内设置有至少两层接地层。
PCT/CN2021/074699 2020-02-24 2021-02-01 背光驱动系统、显示装置和背光驱动板卡 WO2021169739A1 (zh)

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