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 PDFInfo
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- 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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- Prior art keywords
- backlight
- backlight driving
- board
- boards
- power
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- 238000010438 heat treatment Methods 0.000 claims description 28
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- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
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Classifications
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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
- G09G3/342—Control of illumination source using several illumination sources separately controlled corresponding to different display panel areas, e.g. along one dimension such as lines
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20954—Modifications to facilitate cooling, ventilating, or heating for display panels
- H05K7/20963—Heat transfer by conduction from internal heat source to heat radiating structure
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/04—Display protection
- G09G2330/045—Protection against panel overheating
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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
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/06—Handling 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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Abstract
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Claims (17)
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
- 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。
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