CN106504691B - Flat panel display device and display control circuit thereof - Google Patents
Flat panel display device and display control circuit thereof Download PDFInfo
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- CN106504691B CN106504691B CN201611239177.2A CN201611239177A CN106504691B CN 106504691 B CN106504691 B CN 106504691B CN 201611239177 A CN201611239177 A CN 201611239177A CN 106504691 B CN106504691 B CN 106504691B
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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
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention belongs to the technical field of flat panel display, and particularly relates to a flat panel display device and a display control circuit thereof. In the invention, a display control circuit of a flat panel display device comprising a main control module and a backlight driving module is adopted, a first output end of the main control module is connected with an input end of a display screen, a second output end of the main control module is connected with an input end of the backlight driving module, and an output end of the backlight driving module is connected with a backlight module; the main control module outputs a low-voltage differential signal to the display screen, processes the received display data to drive the display screen to display, outputs a backlight driving control signal, and controls the backlight driving control signal to control the light emitting state of the backlight module.
Description
Technical Field
The invention belongs to the technical field of flat panel display, and particularly relates to a flat panel display device and a display control circuit thereof.
Background
In recent years, flat panel display devices have been used in large numbers as display devices due to their excellent picture quality, light weight, thin thickness, and low power consumption. Flat panel display devices include liquid crystal displays, organic light emitting diode displays, and the like, most of which are being commercially utilized.
At present, a technical scheme that a main control chip is combined with a display screen driving chip is mainly adopted in a flat panel display device on the market, however, the scheme does not have a backlight driving function, so that a backlight driving circuit is additionally arranged on the basis of adopting the main control chip and the display screen driving chip in the prior art to meet the requirement of realizing backlight driving control on the flat panel display device, and the circuit structure in the flat panel display device is complex and the manufacturing cost is increased.
Disclosure of Invention
The invention aims to provide a flat panel display device and a display control circuit thereof, and aims to solve the problems that the display circuit is complex to connect and high in production cost, which cannot be solved in the prior art.
The invention is realized in such a way that a display control circuit of a flat panel display device is connected with a display screen and a backlight module in the flat panel display device; the display control circuit comprises a main control module and a backlight driving module, wherein a first output end of the main control module is connected with an input end of the display screen, a second output end of the main control module is connected with an input end of the backlight driving module, and an output end of the backlight driving module is connected with the backlight module.
The main control module comprises a main control chip and is used for outputting a low-voltage differential signal to the display screen, processing the received display data to drive the display screen to display and outputting a backlight driving control signal.
The backlight driving module comprises a backlight driving chip and is used for controlling the light emitting state of the backlight module according to the backlight driving control signal.
The invention also provides a flat panel display device, which comprises a display screen and a backlight module, and a display control circuit of the flat panel display device.
In the invention, a display control circuit of a flat panel display device comprising a main control module and a backlight driving module is adopted, a first output end of the main control module is connected with an input end of a display screen, a second output end of the main control module is connected with an input end of the backlight driving module, and an output end of the backlight driving module is connected with a backlight module; the main control module outputs a low-voltage differential signal to the display screen, processes the received display data to drive the display screen to display, outputs a backlight driving control signal, and controls the backlight driving control signal to control the light emitting state of the backlight module.
Drawings
Fig. 1 is a block diagram of a display control circuit according to an embodiment of the present invention;
FIG. 2 is a block diagram of another display control circuit according to an embodiment of the present invention;
FIG. 3 is a block diagram of an internal module of the main control module shown in FIG. 2;
fig. 4 is a diagram illustrating an internal circuit of the main control module shown in fig. 3.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiment of the invention provides a flat panel display device and a display control circuit thereof, wherein the flat panel display device comprises a common display screen, a backlight module and the display control circuit.
In the embodiment of the invention, the display control circuit comprising the main control module and the backlight driving module is adopted in the flat panel display device, the main control module outputs the low-voltage differential signal to the display screen, processes the received display data to drive the display screen to display, and outputs the backlight driving control signal to control the backlight driving module to control the light emitting state of the backlight module, so that the circuit structure is simplified and the production cost is reduced while the requirement of the flat panel display device for realizing the backlight driving control is met.
Fig. 1 shows a block structure of the display control circuit, and for convenience of explanation, only the portions related to the embodiments of the present invention are shown, and the details are as follows:
the display control circuit 2 is arranged on a circuit board and is connected with the display screen 3 and the backlight module 4 in the flat panel display device 1; the display screen 3 is used for displaying images, and the backlight module 4 is used for providing backlight sources for the display screen 3.
The display control circuit 2 comprises a main control module 10 and a backlight driving module 20, wherein a first output end of the main control module 10 is connected with an input end of the display screen 3, a second output end of the main control module 10 is connected with an input end of the backlight driving module 20, and an output end of the backlight driving module 20 is connected with the backlight module 4.
The main control module 10 includes a main control chip 100, and the main control module 10 is configured to output a low voltage differential signal to the display screen 3, process the received display data to drive the display screen 3 to display, and output a backlight driving control signal.
The backlight driving module 20 includes a backlight driving chip 200, and the backlight driving module 20 is configured to control the light emitting state of the backlight module 4 according to the backlight driving control signal.
Specifically, the backlight driving module 20 includes a backlight driving control circuit and a Boost circuit with the backlight driving control chip 200 as a core.
When the backlight driving control circuit works, the voltage value of the LED can reach a numerical range (the specific numerical value is adjusted according to the requirement) so as to drive the LED backlight lamp strip to emit light; when the backlight driving control circuit does not work, the voltage value of the LED is kept at another value, and the current flowing through the LED backlight lamp bar does not enable the LED backlight lamp bar to emit light, so that the LED backlight lamp bar is protected.
The PWM dimming control unit in the backlight driving control circuit receives a dimming control pulse signal sent by the backlight driving chip, and the duty ratio of the PWM dimming control signal is adjusted correspondingly to further adjust the LED voltage by adjusting the duty ratio of the pulse width modulation signal output by the PWM dimming control unit, so that the current on the LED backlight lamp strip can be changed, and the luminous intensity of the lamp strip is controlled.
The backlight driving control circuit realizes overvoltage protection under the condition that the output LED driving voltage exceeds a set value through an overvoltage protection circuit in the backlight driving chip.
Boost circuits are a commonly used type of switched dc Boost circuit that can provide an output voltage that is higher than an input voltage.
Fig. 2 shows another block configuration of the display control circuit 2 described above, and for convenience of explanation, only the portions related to the embodiments of the present invention are shown, as follows:
the display control circuit 2 further includes: the output end of the power supply module 30 is connected with the fourth input end of the main control module 10; the power supply module 30 is used for supplying power to the main control module 10.
The power supply module 30 includes: an analog voltage supply circuit 300 and a digital voltage supply circuit 301.
The output end of the analog voltage power supply circuit 300 is connected with an analog power supply pin AVDD of the main control chip 100, and the output end of the digital voltage power supply circuit 301 is connected with a digital power supply output pin VDDP of the main control chip 100.
Fig. 3 shows the internal module structure of the above-mentioned main control module 10, and for convenience of explanation, only the parts related to the embodiment of the invention are shown, and the details are as follows:
the main control module 10 includes: the device comprises a main control chip 100, a serial flash memory unit 101, a key control unit 102, a reset unit 103 and an oscillation unit 104.
The first input end of the main control chip 100 is the first input end of the main control module 10, the first output end of the main control chip 100 is the first output end of the main control module 10, the second output end of the main control chip 100 is the second output end of the main control module 10, the third output end of the main control chip 100 is the third output end of the main control module 10, and the fourth input end of the main control chip 100 is the fourth input end of the main control module 10.
The first input end of the serial flash memory unit 101 is connected with a chip gating pin SCZ, a clock pin SCK and a data input pin SDI of the main control chip 100, the second input end of the serial flash memory unit 101 is connected with a first pulse width modulation output pin PWM2/gpio_p24 of the main control chip 100, the output end of the serial flash memory unit 101 is connected with a data output pin SDO of the main control chip 100, the input and output end of the key control unit 102 is connected with a first analog digital conversion pin gpio_p00/SAR1, a second analog digital conversion pin gpio_p00/SAR2, a second pulse width modulation output pin gpio_p07 and a third pulse width modulation output pin gpio_p06 of the main control chip 100, the output end of the reset unit 103 is connected with a reset pin RST of the main control chip 100, the input end of the oscillation unit 104 is connected with a crystal oscillator input pin XIN of the main control chip 100, and the output end of the oscillation unit 104 is connected with a crystal oscillator output pin XOUT of the main control chip 100.
The main control chip 100 is configured to output a low voltage differential signal to the display 3, process the received display data to drive the display 3 to display, and output a backlight driving control signal.
The serial flash memory unit 101 is used for storing an operation program of the main control chip 100.
The key control unit 102 is configured to send a corresponding key control signal to the main control chip 100 according to the received key operation, so that the main control chip 100 performs corresponding display control on the display screen 3 according to the key control signal.
The reset unit 103 is used for outputting a reset signal to reset the main control chip 100 in the power-on or reset process.
The oscillation unit 104 is configured to provide a clock oscillation signal to the main control chip 100.
Fig. 4 shows the internal circuit structure of the above-mentioned main control module 10, and for convenience of explanation, only the portions related to the present embodiment are shown, and the details are as follows:
the serial flash memory unit 101 includes: serial flash chip U7, capacitor C47, and resistor R52.
The data output pin SO of the serial flash memory chip U7 is connected with the data output pin SDO of the main control chip 100, the chip gating pin CS# of the serial flash memory chip U7 is connected with the chip gating pin SCZ of the main control chip 100, the clock pin SCK of the serial flash memory chip U7 is connected with the clock pin SCK of the main control chip 100, and the chip data input pin SI of the serial flash memory chip U7 is connected with the data input pin SDI of the main control chip 100; the power pin VCC of the serial flash memory chip U7, the power pin HOLD reset pin hold# of the serial flash memory chip U7, and the first end of the capacitor C47 are commonly connected to the first voltage source +3.3v (the output voltage thereof may be 3.3V), the second end of the capacitor C47 is grounded, the write protection pin wp# of the serial flash memory chip U7, the first PWM output pin PWM2/gpio_p24 of the host chip 100, and the first end of the resistor R52 are connected, and the ground pin GND of the serial flash memory chip U7 and the second end of the resistor R52 are commonly connected to ground.
The key control unit 102 includes: resistor R48, resistor R49, resistor R53, resistor R54, resistor R64, resistor R65, resistor R66, resistor R67, capacitor C51, capacitor C52, capacitor C53, capacitor C54, transistor Q7, transistor Q8, and keypad CN4.
The first end of the capacitor C51 is connected with the first end 1 of the key board CN4, the first end of the capacitor C52 is connected with the second end 2 of the key board CN4, the first end of the capacitor C53 is connected with the third end 3 of the key board CN4, the first end of the capacitor C54 is connected with the fourth end 4 of the key board CN4, the second end of the capacitor C51, the second end of the capacitor C52, the second end of the capacitor C53, the second end of the capacitor C54 and the fifth end 5 of the key board CN4 are commonly connected with the ground, the first end of the resistor R64 is connected with the base electrode of the triode Q7 to be connected with the second pulse width modulation output pin O_P07 of the master control chip 100, the second end of the resistor R64 and the emitter electrode of the triode Q7 are commonly connected with the second voltage source VCC5V (the output voltage can be 5V), the first end of the collector electrode of the triode Q7 is connected with the first end of the resistor R4, the second end of the resistor R65 is connected with the fourth end 4 of the key board CN4, the first end of the resistor R66 and the third end of the resistor C54 and the fifth end 5 of the key board CN4 are commonly connected with the base electrode of the triode Q8 to be connected with the third pulse width modulation output pin GPIO 06 of the master control chip 100, the base electrode of the triode Q6 and the base electrode of the triode Q6 is commonly connected with the second end of the triode Q6 is connected with the second end 1 and the second end of the triode Q7 to the GPIO 6 is 2 is commonly connected with the second voltage source 3V 6 and the emitter of the emitter is 5V 6 is 5V 5.
The reset unit 103 includes: resistor R45, resistor R46, capacitor C43, and capacitor C46.
The first end of the capacitor C43 is connected to the second voltage source VCC5V (the output voltage thereof may be 5V), the second end of the capacitor C43 is connected to the first end of the resistor R46, the first end of the capacitor C46 and the first end of the resistor R45, the second end of the resistor R46 and the second end of the capacitor C46 are commonly grounded, and the second end of the resistor R45 is connected to the reset pin RST of the main control chip 100.
The oscillation unit 104 includes: resistor R58, capacitor C48, capacitor C49 and crystal oscillator X1.
The first end of the resistor R58, the first end of the crystal oscillator X1 and the first end of the capacitor C48 are commonly connected to the crystal oscillator input pin XIN of the main control chip 100, the second end of the resistor R58, the second end of the crystal oscillator X1 and the first end of the capacitor C49 are commonly connected to the crystal oscillator output pin XOUT of the main control chip 100, and the second end of the capacitor C48, the third end of the crystal oscillator X1 and the second end of the capacitor C49 are commonly connected to the ground.
In the embodiment of the invention, by adopting the display control circuit 2 comprising the main control module 10 and the backlight driving module 20 in the flat panel display device, the first output end of the main control module 10 is connected with the input end of the display screen 3, the second output end of the main control module 10 is connected with the input end of the backlight driving module 20, and the output end of the backlight driving module 20 is connected with the backlight module 4; the main control module 10 outputs a low-voltage differential signal to the display screen 3, processes the received display data to drive the display screen 3 to display, and outputs a backlight driving control signal to control the backlight driving module 20 to control the light emitting state of the backlight module 4 according to the backlight driving control signal, so that the circuit structure is simplified and the production cost is reduced while the requirement of realizing backlight driving control of the flat panel display device 1 is met.
While the invention has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the invention. Therefore, the protection scope of the invention is subject to the protection scope of the claims.
Claims (8)
1. The display control circuit of the flat panel display device is arranged on a circuit board and is connected with a display screen and a backlight module in the flat panel display device; the display control circuit is characterized by comprising a main control module and a backlight driving module, wherein a first output end of the main control module is connected with an input end of the display screen, a second output end of the main control module is connected with an input end of the backlight driving module, and an output end of the backlight driving module is connected with the backlight module;
the main control module comprises a main control chip and is used for outputting a low-voltage differential signal to the display screen, processing the received display data to drive the display screen to display and outputting a backlight driving control signal;
the backlight driving module comprises a backlight driving chip and is used for controlling the light emitting state of the backlight module according to the backlight driving control signal;
the main control module comprises: the device comprises a main control chip, a serial flash memory unit, a key control unit, a reset unit and an oscillation unit;
the first input end of the main control chip is the first input end of the main control module, the first output end of the main control chip is the first output end of the main control module, the second output end of the main control chip is the second output end of the main control module, the third output end of the main control chip is the third output end of the main control module, and the fourth input end of the main control chip is the fourth input end of the main control module;
the first input end of the serial flash memory unit is connected with the data input pin, the clock pin and the chip gating pin of the main control chip, the second input end of the serial flash memory unit is connected with the first pulse width modulation output pin of the main control chip, the output end of the serial flash memory unit is connected with the data output pin of the main control chip, the input and output end of the key control unit is connected with the first analog-digital conversion pin, the second pulse width modulation output pin and the third pulse width modulation output pin of the main control chip, the output end of the reset unit is connected with the reset pin of the main control chip, the input end of the oscillation unit is connected with the crystal oscillator input pin of the main control chip, and the output end of the oscillation unit is connected with the crystal oscillator output pin of the main control chip;
the main control chip is used for outputting a low-voltage differential signal to the display screen, processing the received display data to drive the display screen to display, and outputting a backlight driving control signal;
the serial flash memory unit is used for storing an operation program of the main control chip;
the key control unit is used for sending corresponding key control signals to the main control chip according to the received key operation so that the main control chip can perform corresponding display control on the display screen according to the key control signals;
the reset unit is used for outputting a reset signal in the power-on or reset process to reset the main control chip;
the oscillation unit is used for providing a clock oscillation signal for the main control chip.
2. The display control circuit of claim 1, further comprising: a power supply module;
the output end of the power supply module is connected with the fourth input end of the main control module; the power supply module is used for supplying power to the main control module.
3. The display control circuit of claim 2, wherein the power supply module comprises:
an analog voltage supply circuit and a digital voltage supply circuit;
the output end of the analog voltage power supply circuit is connected with the analog power supply interface of the main control chip, and the output end of the digital voltage power supply circuit is connected with the digital power supply output interface of the main control chip.
4. The display control circuit of claim 1, wherein the serial flash memory cell comprises:
serial flash chip U7, capacitor C47 and resistor R52;
the data output pin of the serial flash memory chip U7 is connected with the data output pin of the main control chip, the chip gating pin of the serial flash memory chip U7 is connected with the chip gating pin of the main control chip, the clock pin of the serial flash memory chip U7 is connected with the clock pin of the main control chip, and the chip data input pin of the serial flash memory chip U7 is connected with the data input pin of the main control chip; the power pin of the serial flash memory chip U7, the power pin suspension reset pin of the serial flash memory chip U7 and the first end of the capacitor C47 are commonly connected to a first voltage source, the second end of the capacitor C47 is grounded, the write-in protection pin of the serial flash memory chip U7, the first pulse width modulation output pin of the main control chip and the first end of the resistor R52 are connected, and the grounding pin of the serial flash memory chip U7 and the second end of the resistor R52 are commonly grounded.
5. The display control circuit according to claim 1, wherein the key control unit includes:
resistor R48, resistor R49, resistor R53, resistor R54, resistor R64, resistor R65, resistor R66, resistor R67, capacitor C51, capacitor C52, capacitor C53, capacitor C54, triode Q7, triode Q8, and keypad CN4;
the first end of the capacitor C51 is connected with the first end of the keypad CN4, the first end of the capacitor C52 is connected with the second end of the keypad CN4, the first end of the capacitor C53 is connected with the third end of the keypad CN4, the first end of the capacitor C54 is connected with the fourth end of the keypad CN4, the second end of the capacitor C51, the second end of the capacitor C52, the second end of the capacitor C54 and the fifth end of the keypad CN4 are commonly grounded, the first end of the resistor R64 is connected with the base electrode of the triode Q7, the second end of the resistor R64 is commonly connected with the emitter electrode of the triode Q7 in a second voltage source, the collector electrode of the triode Q7 is connected with the first end of the resistor R65, the second end of the resistor R65 is connected with the first end of the keypad CN4, the first end of the resistor R66 is commonly connected with the second end of the triode Q7 in a third voltage source, the triode Q8 is commonly connected with the second end of the triode Q7, the triode Q8 is commonly connected with the second end of the triode Q8, and the second end of the triode Q7 is commonly connected with the second end of the triode Q8.
6. The display control circuit according to claim 1, wherein the reset unit includes:
resistor R45, resistor R46, capacitor C43, and capacitor C46;
the first end of the capacitor C43 is connected with a second voltage source, the second end of the capacitor C43 is connected with the first end of the resistor R46, the first end of the capacitor C46 and the first end of the resistor R45, the second end of the resistor R46 and the second end of the capacitor C46 are commonly grounded, and the second end of the resistor R45 is connected with a reset pin of the main control chip.
7. The display control circuit according to claim 1, wherein the oscillation unit includes:
resistor R58, capacitor C48, capacitor C49 and crystal oscillator X1;
the first end of the resistor R58, the first end of the crystal oscillator X1 and the first end of the capacitor C48 are commonly connected to the crystal oscillator input pin of the main control chip, the second end of the resistor R58, the second end of the crystal oscillator X1 and the first end of the capacitor C49 are commonly connected to the crystal oscillator output pin of the main control chip, and the second end of the capacitor C48, the third end of the crystal oscillator X1 and the second end of the capacitor C49 are commonly grounded.
8. A flat panel display device comprising a display screen and a backlight module, wherein the flat panel display device further comprises the display control circuit of any one of claims 1 to 7.
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| CN201611239177.2A CN106504691B (en) | 2016-12-28 | 2016-12-28 | Flat panel display device and display control circuit thereof |
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| CN201611239177.2A CN106504691B (en) | 2016-12-28 | 2016-12-28 | Flat panel display device and display control circuit thereof |
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| CN107205310B (en) * | 2017-06-29 | 2019-12-24 | 惠科股份有限公司 | Circuit board and display device |
| CN110021276B (en) * | 2019-05-10 | 2024-03-29 | 重庆惠科金扬科技有限公司 | Backlight driving circuit and backlight driving device |
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| CN102024400A (en) * | 2009-09-22 | 2011-04-20 | 华映视讯（吴江）有限公司 | Display device and backlight control method |
| CN104537998A (en) * | 2015-01-06 | 2015-04-22 | 友达光电股份有限公司 | Control circuit and method used for liquid crystal display device |
| CN105047144A (en) * | 2015-09-08 | 2015-11-11 | 武汉华星光电技术有限公司 | Liquid crystal display device and backlight control method thereof |
| CN205104207U (en) * | 2015-10-09 | 2016-03-23 | 惠科电子（深圳）有限公司 | Voltage current regulation circuit is shaded |
| CN206412066U (en) * | 2016-12-28 | 2017-08-15 | 合肥惠科金扬科技有限公司 | Panel display apparatus and its display control circuit |
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| US20050248552A1 (en) * | 2004-05-10 | 2005-11-10 | Joyce Yu | Calculator with a color changing display |
| US20140252984A1 (en) * | 2013-03-07 | 2014-09-11 | Shenzhen Chiina Star Optoelectronics Technology Co Ltd. | Led backlight driving circuit, lcd device, and driving circuit |
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| CN102024400A (en) * | 2009-09-22 | 2011-04-20 | 华映视讯（吴江）有限公司 | Display device and backlight control method |
| CN104537998A (en) * | 2015-01-06 | 2015-04-22 | 友达光电股份有限公司 | Control circuit and method used for liquid crystal display device |
| CN105047144A (en) * | 2015-09-08 | 2015-11-11 | 武汉华星光电技术有限公司 | Liquid crystal display device and backlight control method thereof |
| CN205104207U (en) * | 2015-10-09 | 2016-03-23 | 惠科电子（深圳）有限公司 | Voltage current regulation circuit is shaded |
| CN206412066U (en) * | 2016-12-28 | 2017-08-15 | 合肥惠科金扬科技有限公司 | Panel display apparatus and its display control circuit |
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