CN209487136U - A kind of subregion backlight drive circuit, device and television set - Google Patents
A kind of subregion backlight drive circuit, device and television set Download PDFInfo
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- CN209487136U CN209487136U CN201822229275.9U CN201822229275U CN209487136U CN 209487136 U CN209487136 U CN 209487136U CN 201822229275 U CN201822229275 U CN 201822229275U CN 209487136 U CN209487136 U CN 209487136U
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Abstract
The utility model discloses a kind of subregion backlight drive circuit, device and television sets, the subregion backlight drive circuit includes computing module, control module and drive module, the computing module is connect with the control module, for the brightness data of each backlight subarea to be calculated and exported according to the picture signal that receives to control module；The control module is also connect with drive module, for exporting each control data for driving channel to drive module according to the corresponding relationship of the brightness data and preset driving channel and backlight subarea；The drive module is connect with multiple backlight subareas, for being worked according to each backlight subarea of corresponding relationship respective drive of the control data and preset driving channel and backlight subarea.By the corresponding relationship in preset driving channel and backlight subarea, corresponding backlight subarea is driven using multiple independent driving combination of channels, multichannel low current backlight drive is realized, effectively solves band interference problem caused by peak brightness.
Description
Technical field
The utility model relates to TV technology, in particular to a kind of subregion backlight drive circuit, device and television set.
Background technique
In order to realize that HDR (High-Dynamic Range, high dynamic range) image is shown, back light system uses LCD TV
Multi partition control reaches the excellent HDR effect of image by improving subregion peak brightness.Traditional LED backlight uses single-pass
The driving of road constant current loop, but since the electric current adjustment degree in practical LED constant current driving channel is limited, output current peak cannot be real
When need with brightness and significantly adjust, in order to reach HDR display effect, system usually fixes the electric current in each driving channel
Under HDR high current state, the display effect of HDR is realized by adjusting LED drive current pulsewidth.Therefore, in common white field
When display, peak point current is still very high, and large area peak brightness may cause part LCD panel polysilicon performance change, finally
Show stripe interference.
Thus the prior art could be improved and improve.
Utility model content
Place in view of above-mentioned deficiencies of the prior art, the purpose of this utility model is to provide a kind of subregion backlight drive electricity
Road, device and television set, by the corresponding relationship in preset driving channel and backlight subarea, using multiple independent driving channel groups
It closes and drives corresponding backlight subarea, realize multichannel low current backlight drive, effectively solve to protect for a long time due to each driving channel
Hold the interference of band caused by high current state.
In order to achieve the above object, the utility model takes following technical scheme:
A kind of subregion backlight drive circuit, connect with back light, and the back light includes multiple backlight subareas, institute
Stating subregion backlight drive circuit includes computing module, control module and drive module, the computing module and the control module
Connection, for the brightness data of each backlight subarea to be calculated and exported according to the picture signal that receives to control module；It is described
Control module is also connect with drive module, for pair according to the brightness data and preset driving channel and backlight subarea
It should be related to and export each control data for driving channel to drive module；The drive module is connect with multiple backlight subareas, is used
In each backlight subarea of corresponding relationship respective drive according to the control data and preset driving channel and backlight subarea
Work.
In the subregion backlight drive circuit, the drive module includes several driving units, the driving unit
It is connect with control module, each driving unit is correspondingly connected with several backlight subareas, and the driving unit is used for according to
Control each back of corresponding relationship respective drive between data and the driving channel and each backlight subarea of each driving unit
The work of light subregion.
In the subregion backlight drive circuit, when the back light is white light source, each white light backlight subarea
Corresponding at least two driving channel；When the back light is RGB three-color light source, at least one color backlight subregion corresponding two
A driving channel.
In the subregion backlight drive circuit, the computing module includes SOC chip, and the control module includes micro- place
Device is managed, the driving unit includes driving chip, and the SOC chip is connect with microprocessor by the first communication bus, described
Driving chip is connect with microprocessor by the second communication bus.
In the subregion backlight drive circuit, the driving unit further includes filtering subunit, the filter unit with
Microprocessor is connected with driving chip, is filtered for the input signal to driving chip.
In the subregion backlight drive circuit, the driving unit further includes anti-interference subelement, the anti-interference list
Member is connect with microprocessor and driving chip, carries out anti-interference process for the input signal to driving chip.
In the subregion backlight drive circuit, the driving unit further includes isolation subelement, the isolation subelement
It is connect with microprocessor and driving chip, for the regulated voltage signal for being input to driving chip to be isolated.
In the subregion backlight drive circuit, the isolation subelement includes diode, and the anode of the diode is even
Connect ADJF signal end, the 4th foot of the cathode connection driving chip of the diode.
A kind of subregion backlight drive device, including pcb board, which is characterized in that be provided on the pcb board as described above
Subregion backlight drive circuit.
A kind of television set comprising subregion backlight drive device as described above.
Compared to the prior art, in subregion backlight drive circuit provided by the utility model, device and television set, described point
Area's backlight drive circuit, connect with back light, and the back light includes multiple backlight subareas, the subregion backlight drive
Circuit includes computing module, control module and drive module, and the computing module is connect with the control module, is connect for basis
The picture signal received calculates and exports the brightness data of each backlight subarea to control module；The control module also with driving
Module connection, for exporting each drive according to the corresponding relationship of the brightness data and preset driving channel and backlight subarea
The control data in dynamic channel are to drive module；The drive module is connect with multiple backlight subareas, for according to the control number
Accordingly and each backlight subarea of corresponding relationship respective drive of preset driving channel and backlight subarea works.Pass through preset drive
The corresponding relationship in dynamic channel and backlight subarea drives corresponding backlight subarea using multiple independent driving combination of channels, realizes more
Channel low current backlight drive effectively solves that band caused by high current state is kept to interfere for a long time due to each driving channel.
Detailed description of the invention
Fig. 1 is the structural block diagram of subregion backlight drive circuit provided by the utility model.
Fig. 2 is that driving unit and backlight subarea are correspondingly connected with schematic diagram in first embodiment provided by the utility model.
Fig. 3 is that driving unit and backlight subarea are correspondingly connected with schematic diagram in second embodiment provided by the utility model.
(a) figure in Fig. 4 is the current waveform figure in two driving channels in preferred embodiment provided by the utility model.
(b) figure in Fig. 4 is the current waveform figure of backlight subarea in preferred embodiment provided by the utility model.
Fig. 5 is the circuit diagram of driving unit in subregion backlight drive circuit provided by the utility model.
Specific embodiment
The utility model provides a kind of subregion backlight drive circuit, device and television set, by preset driving channel with
The corresponding relationship of backlight subarea drives corresponding backlight subarea using multiple independent driving combination of channels, realizes the low electricity of multichannel
Backlight drive is flowed, effectively solves that band caused by high current state is kept to interfere for a long time due to each driving channel.
To keep the purpose of this utility model, technical solution and effect clearer, clear, develop simultaneously implementation referring to the drawings
The utility model is further described in example.It should be appreciated that specific embodiment described herein is only practical to explain
It is novel, it is not used to limit the utility model.
Referring to Fig. 1, subregion backlight drive circuit provided by the utility model is connect with back light, the back light
Including multiple backlight subareas, the subregion backlight drive circuit includes computing module 10, control module 20 and drive module 30,
Described in computing module 10 connect with control module 20, the control module 20 is connect with drive module 30, the drive module
30 connect with multiple backlight subareas, wherein the computing module 10 is used to calculate and export each according to the picture signal received
The brightness data of backlight subarea is to control module 20；The control module 20 is used for according to the brightness data and preset drive
The corresponding relationship of dynamic channel and backlight subarea exports each control data for driving channel to drive module 30；The drive module
30 for each backlight of corresponding relationship respective drive according to the control data and preset driving channel and backlight subarea
Subregion work.I.e. in the present embodiment, the drive module 30 has multiple driving channels, and the driving channel and each backlight
There is preset corresponding relationship, preferably each backlight subarea is corresponding with multiple driving channels, each driving channel between subregion
Control data can individually be controlled by the every frame image signal received, using multiple independent driving combination of channels drivings
Multichannel low current backlight drive is realized in corresponding backlight subarea, avoids and grows in the prior art since single channel circuit drives
Time is in caused band interference under high current state.
Specifically, the drive module 30 include several driving units 301, the driving unit 301 with control mould
Block 20 connects, and each driving unit 301 is correspondingly connected with several backlight subareas, and the driving unit 301 is used for according to the control
The each back of corresponding relationship respective drive between data processed and the driving channel and each backlight subarea of each driving unit 301
The work of light subregion.When it is implemented, the drive module 30 includes multiple driving units 301, the control module 20 uses chrysanthemum
Pattern chain mode connects each driving unit 301, and each driving unit 301 all has several driving channels, the driving channel
It is attached according to actual needs by preset corresponding relationship according to back light unit, when driving back light work, each drive
Moving cell 301 is according to each back of corresponding relationship respective drive between the control data and each channel and backlight subarea received
The control data of the work of light subregion, each driving channel can independently export and then adjust the running parameter of backlight subarea, improve
The flexibility of backlight constant current driving, the output that driving channel can be accordingly adjusted according to the corresponding brightness data of image information are electric
Stream reduces peak brightness when complete white field display, disappears it is not necessary that each driving channel current is fixed on high current state always
In addition to the undesirable excitation of the TFT layer polysilicon to LCD TV, so that the adaptability of LCD TV improves.
Preferably, in the utility model first embodiment, when the back light is white light source, each white light backlight
Subregion corresponding at least two driving channel, as shown in Fig. 2, each white light backlight subarea is combined drive using two driving channels
It is dynamic, certainly in other embodiments, more than two driving one white light backlight subarea of channels drive can also be used.The utility model
In second embodiment, when the back light is RGB three-color light source, corresponding two drivings of at least one color backlight subregion are logical
Road, as shown in figure 3, feux rouges backlight subarea is combined driving using two driving channels, and green light backlight is divided in the present embodiment
Area and blue light backlight subarea are then driven using single driving channel, certainly in other embodiments, can also be according to actually answering
With need and LED optics and electrical situation select other combine driving relationship, the utility model to this with no restriction.
When it is implemented, the control data, including pulsewidth, amplitude and phase etc. in each driving channel can be independent
Programming exports and then adjusts the running parameter of backlight subarea, as shown in figure 5, it is to use in the utility model preferred embodiment
When two driving one backlight subareas of channels drive, the current waveform of two current waveforms for driving channel and backlight subarea
Figure, corresponding two constant currents of the same subregion drive channel, and subregion LED current is the sum of two constant current driving channel currents, electric current
Amplitude and pulsewidth are overlapped, and can also carry out the adjustment of phase, therefore pass through multiple independent driving combination of channels drivings
Corresponding backlight subarea not only reduces the peak brightness under complete white vision-control, reduces band interference, also improves driving spirit
Activity can carry out the combination in driving channel according to different display demands.
When it is implemented, the computing module 10 includes SOC chip, the control module 20 includes microprocessor, described
Driving unit 301 includes driving chip, and the SOC chip is connect with microprocessor by the first communication bus, the driving core
Piece is connect with microprocessor by the second communication bus.In the present embodiment, the computing module 10 is using SOC chip according to every
Frame image signal calculates and exports the brightness data of each backlight subarea, and when using white light driving, the output of SOC chip is all
The brightness value Y of backlight subarea；When backlight uses tri- color backlight of RGB, SOC chip exports the average bright of the R&G&B of all subregions
Angle value, the brightness data are transmitted to control module 20 by the first communication bus (being spi bus in the present embodiment), wherein
Spi bus is described by clock CLK, serial input data DATAIN, gating signal CS and serial data output DATA OUT composition
First communication bus is also possible to other and meets bus, such as Manchester bus etc. that synchronous real-time Data Transmission requires, this
The chip of the model 6M60 of MSTAR can be used to calculate and complete, certainly in other embodiments in SOC chip described in embodiment
In, other chips with phase same-action can also be used, the utility model is not construed as limiting this.
Preferably, the microprocessor receives the brightness data by SPI interface, and is exported and controlled according to the brightness
The drive module 30 works.The microprocessor receives every frame subregion brightness data, and the HDR for completing brightness data in real time turns
It changes, and according to the calculation processing of preset driving channel corresponding control parameter related to the completion of the corresponding relationship of backlight subarea, so
After send control data to driving chip, be sent to drive especially by the second communication bus (in the present embodiment be SPI bus)
Dynamic chip, the spi bus include SPI serial date transfer MOSI, and clock CLK, SPI serial data exports MISO and gating signal
CS realizes that data are transmitted in real time.The MCU of model LPC114 can be used in microprocessor described in the present embodiment, certainly at it
In his embodiment, other microprocessors with phase same-action can also be used, the utility model is not construed as limiting this.
When it is implemented, multiple driving chips can carry out networking control by SPI daisy chaining, according to required by reality
LED driving intensity, configure LED subregion corresponding to constant current drive number of active lanes.Model is used in the present embodiment
Single pass electric current can be separately provided for the constant-current driven chip of 16 channels output in the driving chip of IWAT7038, and
Constant flow channel can be carried out used in parallel, certainly in other embodiments, other drivings with phase same-action can also be used
Chip, the utility model are not construed as limiting this.
Preferably, please refer to fig. 5, by taking the driving of tri- color of RGB as an example, wherein back light unit is 4 red R, green G, indigo plant B
Three-color LED lamp bead, red light subregion using 2 channels CH be combined driving (CH1 and CH2 are in parallel, CH5 and CH6 parallel connection,
CH9 and CH10 is in parallel, and CH13 and CH14 are in parallel, drives Different Red lamp after parallel connection two-by-two), blue lamp and green light use the single channel CH
Driven that (different green lights are operated alone in CH3, CH7, CH11, CH15；Different indigo plants are operated alone in CH4, CH8, CH12, CH16
Lamp), realize the Multi-channel parallel connection driving of single subregion.Driving chip U1 is from the received Communication Control signal packet of microcontroller
SPI clock sclk 1 is included, SPI serial date transfer MOSI, SPI serial data exports SDI_101, chip SPI gating signal
XCS, frame synchronizing signal VSYNC, PWM pulsewidth reference frequency HSYNC, miscue signal ERR, voltage adjustment signal ADJ, chip
Gating signal EN etc.,
When it is implemented, the driving unit 301 further includes filtering subunit 3011, anti-interference subelement 3012 and isolation
Subelement 3013, the filter unit are connect with microprocessor and driving chip U1, for the input signal to driving chip U1
It is filtered；The anti-interference unit is connect with microprocessor and driving chip U1, for the input to driving chip U1
Signal carries out anti-interference process；The isolation subelement 3013 is connect with microprocessor and driving chip U1, for being input to
The regulated voltage signal of driving chip U1 is isolated.By being filtered, resisting to the input signal for being input to driving chip U1
Interference and isolation processing, it is ensured that be input to control data, regulated voltage signal and other input signals of driving chip U1
Not by clutter, interference further improves driving stability.
Specifically, the filtering subunit 3011 includes first resistor R1, second resistance R2,3rd resistor R3, the 4th electricity
R4, the 5th resistance R5, first capacitor C1, the second capacitor C2, third capacitor C3, the 4th capacitor C4 and the 5th capacitor C5 are hindered, it is described
One end of first resistor R1 connects the 9th foot of one end of first capacitor C1, XCS signal end and driving chip U1, first electricity
The other end of the other end and first capacitor C1 that hinder R1 is grounded；One end of the second resistance R2 connects the second capacitor C2's
One end, VSYNC signal end and driving chip U1 the 7th foot, the other end of the second resistance R2 and the second capacitor C2's is another
End is grounded；One end connection one end of third capacitor C3 of the 3rd resistor R3, MOSI signal end and driving chip U1 the
10 feet, the other end of the 3rd resistor R3 and the other end of third capacitor C3 are grounded；One end of the 4th resistance R4 connects
Connect one end of the 4th capacitor C4, the 11st foot of SCLK1 signal end and driving chip U1, the other end of the 4th resistance R4 and
The other end of four capacitor C4 is grounded；One end of the 5th resistance R5 connects one end, EN1 signal end and the drive of the 5th capacitor C5
The 5th foot of dynamic chip U1, the other end of the 5th resistance R5 and the other end of the 5th capacitor C5 are grounded.Pass through several RC
Filter circuit is filtered the Communication Control signal for being input to driving chip U1, and line-hit is avoided to improve signal stabilization
Property.
Further, the anti-interference subelement 3012 includes the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the
One end of nine resistance R9 and the tenth resistance R10, the 6th resistance R6 connect HSYNC signal end, and the 6th resistance R6's is another
The 6th foot of one end connection driving chip U1；One end of the 7th resistance R7 connects VSYNC signal end, the 6th resistance R6
The other end connection driving chip U1 the 7th foot；One end of the 8th resistance R8 connects XCS signal end, the 8th resistance
The 9th foot of the other end connection driving chip U1 of R8；One end connection MOSI signal end of the 9th resistance R9, the described 9th
The 10th foot of the other end connection driving chip U1 of resistance R9；One end of the tenth resistance R10 connects MISO signal end, described
The 12nd foot of the other end connection driving chip U1 of tenth resistance R10.By on each signal input pin series resistor can change
Impedance match situation between kind signal wire reduces reflection and avoids vibrating and then reaching jamproof purpose.
Further, the isolation subelement 3013 includes diode D1, the anode connection ADJF of the diode D1
Signal end, the 4th foot of the cathode connection driving chip U1 of the diode D1.Driving voltage is being adjusted by ADJF signal end
When, due to using multiple driving chip U1, it is possible to create interfere with each other, play buffer action by diode D1, it is ensured that each
Independence and accuracy of the driving chip U1 when adjusting driving voltage.
Preferably, the driving unit 301 further includes eleventh resistor R11 and twelfth resistor R12, the 11st electricity
One end of one end and twelfth resistor R12 for hindering R11 is all connected with V3_3 power end, and the other end of the eleventh resistor R11 connects
Connect XCS signal end and the 9th foot of driving chip U1, the other end connection ERR signal end of the twelfth resistor R12 and driving
The 8th foot of chip U1, the eleventh resistor R11 and twelfth resistor R12 are pull-up resistor, by the clamping of respective pin
Ensure the normal input of signal in high level.The driving unit 301 further includes thirteenth resistor R13, the thirteenth resistor
One end connection VIN signal end of R13, the 1st foot of one end connection driving chip U1 of the thirteenth resistor R13, the described tenth
Three resistance R13 are current-limiting resistance, carry out current limliting for the input power to driving chip U1 and guarantee chip safety in utilization.It needs
Bright, remaining resistance is the sampling resistor in each driving channel in Fig. 5, remaining capacitor is filter capacitor, since it is
The prior art, the utility model do not repeat its connection relationship.
Based on above-mentioned subregion backlight drive circuit, the utility model correspondingly provides a kind of subregion backlight drive device,
Including pcb board, subregion backlight drive circuit as described above is provided on the pcb board, due to carrying on the back to the subregion above
Light drive circuit is described in detail, and details are not described herein again.
Based on above-mentioned subregion backlight drive device, the utility model correspondingly provides a kind of television set comprising upper described
Subregion backlight drive device, it is no longer superfluous herein since the subregion backlight drive device being described in detail above
It states.
In conclusion in subregion backlight drive circuit provided by the utility model, device and television set, the subregion backlight
Driving circuit is connect with back light, and the back light includes multiple backlight subareas, the subregion backlight drive circuit packet
Computing module, control module and drive module are included, the computing module is connect with the control module, is received for basis
Picture signal calculates and exports the brightness data of each backlight subarea to control module；The control module also connects with drive module
It connects, for exporting each driving channel according to the corresponding relationship of the brightness data and preset driving channel and backlight subarea
Control data to drive module；The drive module is connect with multiple backlight subareas, for according to the control data and
The each backlight subarea of corresponding relationship respective drive of preset driving channel and backlight subarea works.Pass through preset driving channel
With the corresponding relationship of backlight subarea, corresponding backlight subarea is driven using multiple independent driving combination of channels, realizes that multichannel is low
Electric current backlight drive effectively solves that band caused by high current state is kept to interfere for a long time due to each driving channel.
It is understood that for those of ordinary skills, can with technical solution according to the present utility model and
The design of its utility model is subject to equivalent substitution or change, and all these changes or replacement all should belong to appended by the utility model
Scope of protection of the claims.
Claims (10)
1. a kind of subregion backlight drive circuit, connect with back light, the back light includes multiple backlight subareas, special
Sign is, the subregion backlight drive circuit includes computing module, control module and drive module, the computing module with it is described
Control module connection, for the brightness data of each backlight subarea to be calculated and exported according to the picture signal that receives to controlling mould
Block；The control module is also connect with drive module, for according to the brightness data and preset driving channel and backlight
The corresponding relationship of subregion exports each control data for driving channel to drive module；The drive module and multiple backlight subareas
Connection, for each back of corresponding relationship respective drive according to the control data and preset driving channel and backlight subarea
The work of light subregion.
2. subregion backlight drive circuit according to claim 1, which is characterized in that the drive module includes several drives
Moving cell, the driving unit are connect with control module, and each driving unit is correspondingly connected with several backlight subareas, the drive
Moving cell is for corresponding between the driving channel and each backlight subarea according to the control data and each driving unit
The each backlight subarea work of relationship respective drive.
3. subregion backlight drive circuit according to claim 2, which is characterized in that when the back light is white light source
When, each white light backlight subarea corresponding at least two driving channel；When the back light is RGB three-color light source, at least one
The corresponding two driving channels of a color backlight subregion.
4. subregion backlight drive circuit according to claim 2, which is characterized in that the computing module includes SOC chip,
The control module includes microprocessor, and the driving unit includes driving chip, and the SOC chip and microprocessor pass through the
The connection of one communication bus, the driving chip are connect with microprocessor by the second communication bus.
5. subregion backlight drive circuit according to claim 4, which is characterized in that the driving unit further includes filtering
Unit, the filtering subunit are connect with microprocessor and driving chip, are filtered for the input signal to driving chip
Processing.
6. subregion backlight drive circuit according to claim 4, which is characterized in that the driving unit further includes anti-interference
Subelement, the anti-interference unit connect with microprocessor and driving chip, resist for the input signal to driving chip
Interference processing.
7. subregion backlight drive circuit according to claim 4, which is characterized in that the driving unit further includes insulator
Unit, the isolation subelement are connect with microprocessor and driving chip, for adjusting letter to the voltage for being input to driving chip
Number it is isolated.
8. subregion backlight drive circuit according to claim 7, which is characterized in that the isolation subelement includes two poles
Pipe, the anode connection ADJF signal end of the diode, the 4th foot of the cathode connection driving chip of the diode.
9. a kind of subregion backlight drive device, including pcb board, which is characterized in that be arranged on the pcb board just like claim 1-
Subregion backlight drive circuit described in 8 any one.
10. a kind of television set, which is characterized in that including subregion backlight drive device as claimed in claim 9.
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| CN201822229275.9U CN209487136U (en) | 2018-12-28 | 2018-12-28 | A kind of subregion backlight drive circuit, device and television set |
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| CN201822229275.9U CN209487136U (en) | 2018-12-28 | 2018-12-28 | A kind of subregion backlight drive circuit, device and television set |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111369951A (en) * | 2020-04-09 | 2020-07-03 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN111445867A (en) * | 2020-04-22 | 2020-07-24 | Tcl华星光电技术有限公司 | Backlight partition driving module, backlight device and display device |
| CN111489709A (en) * | 2020-06-02 | 2020-08-04 | 上海九山电子科技有限公司 | Backlight source driving circuit, backlight module and liquid crystal display device |
| CN111818284A (en) * | 2020-07-08 | 2020-10-23 | 康佳集团股份有限公司 | Regional dimming system and method for ultra-high-definition television |
| CN112198721A (en) * | 2020-10-29 | 2021-01-08 | Tcl华星光电技术有限公司 | Backlight module and display device |
| CN112820235A (en) * | 2019-10-29 | 2021-05-18 | 无锡飞翎电子有限公司 | Electric appliance, driving device and driving system of display screen |
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2018
- 2018-12-28 CN CN201822229275.9U patent/CN209487136U/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112820235A (en) * | 2019-10-29 | 2021-05-18 | 无锡飞翎电子有限公司 | Electric appliance, driving device and driving system of display screen |
| CN112820235B (en) * | 2019-10-29 | 2022-04-12 | 无锡飞翎电子有限公司 | Electric appliance, driving device and driving system of display screen |
| CN111369951A (en) * | 2020-04-09 | 2020-07-03 | 深圳市华星光电半导体显示技术有限公司 | Backlight module and display device |
| CN111445867A (en) * | 2020-04-22 | 2020-07-24 | Tcl华星光电技术有限公司 | Backlight partition driving module, backlight device and display device |
| CN111489709A (en) * | 2020-06-02 | 2020-08-04 | 上海九山电子科技有限公司 | Backlight source driving circuit, backlight module and liquid crystal display device |
| CN111818284A (en) * | 2020-07-08 | 2020-10-23 | 康佳集团股份有限公司 | Regional dimming system and method for ultra-high-definition television |
| CN112198721A (en) * | 2020-10-29 | 2021-01-08 | Tcl华星光电技术有限公司 | Backlight module and display device |
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