CN105810156A - Backlight adjustment method and circuit - Google Patents
Backlight adjustment method and circuit Download PDFInfo
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- CN105810156A CN105810156A CN201610351213.8A CN201610351213A CN105810156A CN 105810156 A CN105810156 A CN 105810156A CN 201610351213 A CN201610351213 A CN 201610351213A CN 105810156 A CN105810156 A CN 105810156A
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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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- 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
- G09G3/3413—Details of control of colour illumination sources
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- Physics & Mathematics (AREA)
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- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Liquid Crystal Display Device Control (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention provides a backlight adjustment method and a backlight adjustment circuit. In the low gray level, a PWM signal generated by a PWM signal generating circuit controls a backlight drive circuit to adjust a first LED lamp string and a second LED lamp string to give out light alternately. Compared with the prior art, the method and the circuit provided by the invention has the advantages that only one LED lamp string gives out light at the same moment, therefore, the power dissipation of a backlight module can be reduced, and the electric quantity can be saved; meanwhile, due to the vision persistence effect of the eyes, when the first LED lamp string and the second LED lamp string give out light alternately, the phenomenon that one part of the backlight area is bright and the other part of the backlight area is dark is avoided, the glowworm effect is avoided, and the display quality is promoted.
Description
Technical field
The present invention relates to Display Technique field, particularly relate to a kind of backlight adjusting method and backlight regulating circuit.
Background technology
Development along with Display Technique, liquid crystal display (LiquidCrystalDisplay, etc. LCD) flat display apparatus is because having that high image quality, power saving, fuselage be thin and the advantage such as applied range, and it is widely used in the various consumption electronic products such as mobile phone, TV, personal digital assistant, digital camera, notebook computer, desk computer, become the main flow in display device.
Liquid crystal indicator major part on existing market is backlight liquid crystal display, and it includes display panels and backlight module (backlightmodule).The operation principle of display panels is placement liquid crystal molecule in the middle of the glass substrate that two panels is parallel, many tiny electric wires vertically and horizontally are had in the middle of two panels glass substrate, control liquid crystal molecule by whether being energized and change direction, the light of backlight module is reflected generation picture.
At present, in the portable type electronic product with LCDs such as smart mobile phone and panel computer, its power consumption the best part is exactly the backlight module of LCDs, under the premise that the capacity of battery cannot infinitely increase, how to reduce the power consumption of product, the continuation of the journey extending product becomes the problem that strategic point is to be solved, based on this, propose a kind of content-adaptive brilliance control (ContentAdaptiveBrightnessControl, CABC) technology, CABC technology can adjust the relation between the grey decision-making of this image and screen backlight brightness according to the image that screen shows, while effectively reducing screen backlight brightness, the basic display effect keeping image.Specifically by regulating backlight drive integrated circuit (IntegratedCircuit, IC) pulse width modulation (PulseWidthModulation received, PWM) dutycycle of signal realizes dynamic adjusting backlight luminance, namely reduces the purpose of power consumption by reducing the dutycycle of pwm signal.
Specifically, the existing dynamic backlight control method adopting CABC technology, generally include following steps: step 1, extraction show the characteristic parameter of picture, calculate the factor values that backlight needs to adjust subsequently；Step 2, according to factor values regulate pwm signal dutycycle, and then control the brightness of backlight module, according to calculated regulatory factor value, liquid crystal is compensated, the corresponding grey decision-making adjusting display picture itself simultaneously, be jointly input to panel both final and carry out picture and show.Further, in backlight module, generally comprise two string LED lamp bar, when carrying out dynamic backlight adjustment under low GTG, can select to close wherein a string LED lamp bar, only lighting another cluster of lamps, ornamental bar, thus reducing power consumption to arrive the purpose of power saving, but so backlight area there will be brightness unevenness phenomenon one piece bright and a piece dark, i.e. Lampyridea effect, has had a strong impact on display quality.
Summary of the invention
It is an object of the invention to provide a kind of backlight adjusting method, it is possible to eliminate Lampyridea effect during low GTG, promote display quality, reduce backlight power consumption.
The present invention also aims to provide a kind of backlight regulating circuit, it is possible to eliminate Lampyridea effect during low GTG, promote display quality, reduce backlight power consumption.
For achieving the above object, present invention firstly provides a kind of backlight adjusting method, comprise the steps:
Step 1, provide a backlight regulating circuit, backlight drive circuit that the pwm signal generation circuit being electrically connected including video data Acquisition Circuit and described video data Acquisition Circuit and described pwm signal generation circuit are electrically connected and the backlight being electrically connected with described backlight drive circuit；
Described backlight includes the first LED string and second LED string series-parallel with described first LED；
Step 2, described video data Acquisition Circuit gather the grey decision-making of currently displaying picture, and are transferred to pwm signal generation circuit；
Step 3, described pwm signal generation circuit produce corresponding pwm signal to backlight drive circuit according to the grey decision-making of currently displaying picture, and described backlight drive circuit is dimmed by the pwm signal received；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit produces controls backlight drive circuit and regulates described first LED string and the alternately luminescence of described second LED string；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit produces controls the brightness of the backlight drive circuit described first LED string of adjustment and the second LED string and reduces.
Described first LED string includes: the first LED of multiple series connection, is provided with interval between each first LED, and described second LED string includes: the second LED of multiple series connection, and the interval between each second LED difference each first LED corresponding is arranged.
The GTG threshold value preset in described step 3 range for 0 GTG to 15 GTGs.
During the alternately luminescence of the first LED string described in described step 3 and described second LED string, the glow frequency of described first LED string and the second LED string is be more than or equal to 30Hz.
In described step 3 when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the backlight drive signal combination produced with described backlight drive circuit after backlight drive circuit reception pwm signal, corresponding first LED string and the second LED string produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.
The present invention also provides for a kind of backlight regulating circuit, including: the pwm signal that video data Acquisition Circuit and described video data Acquisition Circuit are electrically connected produces the backlight drive circuit that electric and described pwm signal generation circuit is electrically connected and the backlight being electrically connected with described backlight drive circuit；
Described backlight includes the first LED string and second LED string series-parallel with described first LED；
Described video data Acquisition Circuit gathers the grey decision-making of currently displaying picture, and it is transferred to pwm signal generation circuit, described pwm signal generation circuit produces corresponding pwm signal to backlight drive circuit according to the grey decision-making of currently displaying picture, and described backlight drive circuit is dimmed by the pwm signal received；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit produces controls backlight drive circuit and regulates described first LED string and the alternately luminescence of described second LED string；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit produces controls the brightness of the backlight drive circuit described first LED string of adjustment and the second LED string and reduces.
Described first LED string includes: the first LED of multiple series connection, is provided with interval between each first LED, and described second LED string includes: the second LED of multiple series connection, and the interval between each second LED difference each first LED corresponding is arranged.
Described default GTG threshold value range for 0 GTG to 15 GTGs.
During the alternately luminescence of described first LED string and described second LED string, the glow frequency of described first LED string and the second LED string is be more than or equal to 30Hz.
When the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the backlight drive signal combination produced with described backlight drive circuit after backlight drive circuit reception pwm signal, corresponding first LED string and the second LED string produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.
Beneficial effects of the present invention: the invention provides a kind of backlight adjusting method, the pwm signal produced by pwm signal generation circuit when low GTG is controlled backlight drive circuit and regulates described first LED string and the alternately luminescence of described second LED string, compared to prior art, under synchronization, also only one of which LED string is luminous, the power consumption of equally possible minimizing backlight module, save electricity, and due to the visual persistence effect of human eye, when described first LED string is with the alternately luminescence of described second LED string, backlight area do not have one piece bright, phenomenon one piece dark, avoid Lampyridea effect, improve display quality.A kind of backlight regulating circuit provided by the invention, it is possible to eliminate Lampyridea effect during low GTG, promote display quality, reduce backlight power consumption.
Accompanying drawing explanation
In order to be able to be further understood that inventive feature and technology contents, refer to the detailed description below in connection with the present invention and accompanying drawing, but accompanying drawing only provides reference and use is described, be not used for the present invention is any limitation as.
In accompanying drawing,
Fig. 1 is the module map of the backlight regulating circuit of the present invention
Fig. 2 be the present invention backlight regulating circuit in the circuit diagram of backlight；
Fig. 3 is the backlight regulating circuit of present invention drive waveforms figure of the first LED string and the second LED string under low GTG；
Fig. 4 is the flow chart of the backlight adjusting method of the present invention.
Detailed description of the invention
For further setting forth the technological means and effect thereof that the present invention takes, it is described in detail below in conjunction with the preferred embodiments of the present invention and accompanying drawing thereof.
Referring to Fig. 4, present invention firstly provides a kind of backlight adjusting method, the method can be used for, in the LCDs with CABC function, comprising the steps:
Step 1, refer to Fig. 1 and in conjunction with Fig. 2, there is provided a backlight regulating circuit, backlight drive circuit 3 that the pwm signal generation circuit 2 being electrically connected including video data Acquisition Circuit 1 and described video data Acquisition Circuit 1 and described pwm signal generation circuit 2 are electrically connected and the backlight 4 being electrically connected with described backlight drive circuit 3；
Described backlight 4 includes the first LED string 41 and the second LED string 42 in parallel with described first LED string 41.
Specifically, described first LED string 41 includes: the first LED 411 of multiple series connection, it is provided with interval between each first LED 411, described second LED string 42 includes: the second LED 421 of multiple series connection, and the interval between each second LED 421 difference each first LED 411 corresponding is arranged.
Further, described pwm signal generation circuit 2 can be display panels drive the CABC module in IC, including GTG comparing unit and the pwm signal output unit that is electrically connected with described GTG comparing unit.
Step 2, described video data Acquisition Circuit 1 gather the grey decision-making of currently displaying picture, and are transferred to pwm signal generation circuit 2.
Specifically, the grey decision-making that described video data Acquisition Circuit 1 collects currently displaying picture is transferred to the GTG comparing unit in pwm signal generation circuit 2.
Step 3, described pwm signal generation circuit 2 produce corresponding pwm signal to backlight drive circuit 3 according to the grey decision-making of currently displaying picture, and described backlight drive circuit 3 is dimmed by the pwm signal received；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit 2 produces controls backlight drive circuit 3 and regulates described first LED string 41 and described second LED string 42 alternately luminescence；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit 2 produces controls backlight drive circuit 3 and regulates the brightness reduction of described first LED string 41 and the second LED string 42.
Specifically, in described pwm signal generation circuit 2, the grey decision-making of currently displaying picture is compared by GTG comparing unit with the GTG threshold value preset, and sending corresponding pwm signal generation control signal to pwm signal output unit according to comparative result, described pwm signal output unit produces the control signal corresponding pwm signal of generation according to receiving pwm signal and exports.
Specifically, the GTG threshold value preset in described step 3 range for 0 GTG to 15 GTGs, namely under low GTG, make described first LED string 41 and described second LED string 42 alternately luminescence, under high gray, reduce the brightness of the first LED string 41 and described second LED string 42.
Further, refer to Fig. 3, in described step 3 when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, backlight drive circuit 3 receives the backlight drive signal combination produced after pwm signal with described backlight drive circuit 3, corresponding first LED string 41 and the second LED string 42 produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.The alternately luminescence of described first LED string and described second LED string is driven by the first drive waveforms and the second drive waveforms, compared to prior art, under synchronization, also only one of which LED string is luminous, the power consumption of equally possible minimizing backlight module, save electricity, and due to the visual persistence effect of human eye, when described first LED string is with the alternately luminescence of described second LED string, backlight area does not have phenomenon one piece bright, a piece dark, avoid Lampyridea effect, improve display quality.
It should be noted that, when described first LED string 41 is with described second LED string 42 alternately luminescence, the glow frequency of described first LED string 41 and the second LED string 42 is be more than or equal to 30Hz, thus making full use of the visual persistence effect of human eye, eliminates Lampyridea effect.
Additionally, when the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, pwm signal generation circuit 2 then has relatively low duty ratio pwm signal by output one, the brightness simultaneously controlling the first LED string 41 and the second LED string 42 reduces.
Refer to Fig. 1, and in conjunction with Fig. 2, the present invention also provides for a kind of backlight regulating circuit, including: pwm signal generation circuit 2 that video data Acquisition Circuit 1 and described video data Acquisition Circuit 1 are electrically connected and the backlight drive circuit 3 that described pwm signal generation circuit 2 is electrically connected and the backlight 4 that is electrically connected with described backlight drive circuit 3；
Described backlight 4 includes the first LED string 41 and the second LED string 42 in parallel with described first LED string 41.
Specifically, described first LED string 41 includes: the first LED 411 of multiple series connection, it is provided with interval between each first LED 411, described second LED string 42 includes: the second LED 421 of multiple series connection, and the interval between each second LED 421 difference each first LED 411 corresponding is arranged.
Further, described pwm signal generation circuit 2 can be display panels drive the CABC module in IC, including GTG comparing unit and the pwm signal output unit that is electrically connected with described GTG comparing unit.
It should be noted that, the work process of this circuit is: described video data Acquisition Circuit 1 gathers the grey decision-making of currently displaying picture, and it is transferred to pwm signal generation circuit 2, described pwm signal generation circuit 2 produces corresponding pwm signal to backlight drive circuit 3 according to the grey decision-making of currently displaying picture, and described backlight drive circuit 3 is dimmed by the pwm signal received；
In described pwm signal generation circuit 2, the grey decision-making of currently displaying picture is compared by GTG comparing unit with the GTG threshold value preset, and sending corresponding pwm signal generation control signal to pwm signal output unit according to comparative result, described pwm signal output unit produces the control signal corresponding pwm signal of generation according to receiving pwm signal and exports；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit 2 produces controls backlight drive circuit 3 and regulates described first LED string 41 and described second LED string 42 alternately luminescence；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit 2 produces controls backlight drive circuit 3 and regulates the brightness reduction of described first LED string 41 and the second LED string 42.
Further, refer to Fig. 3, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, backlight drive circuit 3 receives the backlight drive signal combination produced after pwm signal with described backlight drive circuit 3, corresponding first LED string 41 and the second LED string 42 produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.The alternately luminescence of described first LED string and described second LED string is driven by the first drive waveforms and the second drive waveforms, compared to prior art, under synchronization, also only one of which LED string is luminous, the power consumption of equally possible minimizing backlight module, save electricity, and due to the visual persistence effect of human eye, when described first LED string is with the alternately luminescence of described second LED string, backlight area does not have phenomenon one piece bright, a piece dark, avoid Lampyridea effect, improve display quality.
It should be noted that, when described first LED string 41 is with described second LED string 42 alternately luminescence, the glow frequency of described first LED string 41 and the second LED string 42 is be more than or equal to 30Hz, thus making full use of the visual persistence effect of human eye, eliminates Lampyridea effect.
Specifically, described default GTG threshold value range for 0 GTG to 15 GTGs, namely under low GTG, make described first LED string 41 and described second LED string 42 alternately luminescence, under high gray, reduce the brightness of the first LED string 41 and described second LED string 42.
Additionally, when the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, pwm signal generation circuit 2 then has relatively low duty ratio pwm signal by output one, the brightness simultaneously controlling the first LED string 41 and the second LED string 42 reduces.
In sum, the invention provides a kind of backlight adjusting method, the pwm signal produced by pwm signal generation circuit when low GTG is controlled backlight drive circuit and regulates described first LED string and the alternately luminescence of described second LED string, compared to prior art, under synchronization, also only one of which LED string is luminous, the power consumption of equally possible minimizing backlight module, save electricity, and due to the visual persistence effect of human eye, when described first LED string is with the alternately luminescence of described second LED string, backlight area do not have one piece bright, phenomenon one piece dark, avoid Lampyridea effect, improve display quality.A kind of backlight regulating circuit provided by the invention, it is possible to eliminate Lampyridea effect during low GTG, promote display quality, reduce backlight power consumption.
The above, for the person of ordinary skill of the art, it is possible to conceive according to technical scheme and technology and make other various corresponding changes and deformation, and all these change and deform the protection domain that all should belong to the claims in the present invention.
Claims (10)
1. a backlight adjusting method, it is characterised in that comprise the steps:
Step 1, provide a backlight regulating circuit, backlight drive circuit (3) that the pwm signal generation circuit (2) being electrically connected including video data Acquisition Circuit (1) and described video data Acquisition Circuit (1) and described pwm signal generation circuit (2) are electrically connected and the backlight (4) being electrically connected with described backlight drive circuit (3)；
Described backlight (4) includes the first LED string (41) and the second LED string (42) in parallel with described first LED string (41)；
Step 2, described video data Acquisition Circuit (1) gather the grey decision-making of currently displaying picture, and are transferred to pwm signal generation circuit (2)；
Step 3, described pwm signal generation circuit (2) produce corresponding pwm signal to backlight drive circuit (3) according to the grey decision-making of currently displaying picture, and described backlight drive circuit (3) is dimmed by the pwm signal received；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit (2) produces controls backlight drive circuit (3) and regulates described first LED string (41) and the alternately luminescence of described second LED string (42)；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit (2) produces controls backlight drive circuit (3) and regulates the brightness reduction of described first LED string (41) and the second LED string (42).
2. backlight adjusting method as claimed in claim 1, it is characterized in that, described first LED string (41) including: first LED (411) of multiple series connection, it is provided with interval between each first LED (411), described second LED string (42) including: second LED (421) of multiple series connection, and the interval between each second LED (421) difference each first LED (411) corresponding is arranged.
3. backlight adjusting method as claimed in claim 1, it is characterised in that the GTG threshold value preset in described step 3 range for 0 GTG to 15 GTGs.
4. backlight adjusting method as claimed in claim 1, it is characterized in that, during the alternately luminescence of the first LED string (41) described in described step 3 and described second LED string (42), the glow frequency of described first LED string (41) and the second LED string (42) is be more than or equal to 30Hz.
5. backlight adjusting method as claimed in claim 1, it is characterized in that, in described step 3 when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the backlight drive signal combination produced with described backlight drive circuit (3) after backlight drive circuit (3) reception pwm signal, corresponding first LED string (41) and the second LED string (42) produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.
6. a backlight regulating circuit, it is characterized in that, including: pwm signal generation circuit (2) that video data Acquisition Circuit (1) and described video data Acquisition Circuit (1) are electrically connected and the backlight drive circuit (3) that described pwm signal generation circuit (2) is electrically connected and the backlight (4) that is electrically connected with described backlight drive circuit (3)；
Described backlight (4) includes the first LED string (41) and the second LED string (42) in parallel with described first LED string (41)；
Described video data Acquisition Circuit (1) gathers the grey decision-making of currently displaying picture, and it is transferred to pwm signal generation circuit (2), described pwm signal generation circuit (2) produces corresponding pwm signal to backlight drive circuit (3) according to the grey decision-making of currently displaying picture, and described backlight drive circuit (3) is dimmed by the pwm signal received；
Wherein, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the pwm signal that described pwm signal generation circuit (2) produces controls backlight drive circuit (3) and regulates described first LED string (41) and the alternately luminescence of described second LED string (42)；
When the grey decision-making of described currently displaying picture is equal to or higher than the GTG threshold value preset, the pwm signal that described pwm signal generation circuit (2) produces controls backlight drive circuit (3) and regulates the brightness reduction of described first LED string (41) and the second LED string (42).
7. backlight regulating circuit as claimed in claim 6, it is characterized in that, described first LED string (41) including: first LED (411) of multiple series connection, it is provided with interval between each first LED (411), described second LED string (42) including: second LED (421) of multiple series connection, and the interval between each second LED (421) difference each first LED (411) corresponding is arranged.
8. backlight regulating circuit as claimed in claim 6, it is characterised in that described default GTG threshold value range for 0 GTG to 15 GTGs.
9. backlight regulating circuit as claimed in claim 6, it is characterized in that, during the alternately luminescence of described first LED string (41) and described second LED string (42), the glow frequency of described first LED string (41) and the second LED string (42) is be more than or equal to 30Hz.
10. backlight regulating circuit as claimed in claim 6, it is characterized in that, when the grey decision-making of described currently displaying picture is lower than default GTG threshold value, the backlight drive signal combination produced with described backlight drive circuit (3) after backlight drive circuit (3) reception pwm signal, corresponding first LED string (41) and the second LED string (42) produce the first drive waveforms and the second drive waveforms respectively, and described first drive waveforms is contrary with the current potential of described second drive waveforms.
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| CN106782346A (en) * | 2016-12-29 | 2017-05-31 | 深圳市华星光电技术有限公司 | A kind of backlight module circuit and liquid crystal display |
| CN108335677A (en) * | 2018-02-11 | 2018-07-27 | 京东方科技集团股份有限公司 | Luminance compensation method, luminance compensating mechanism and display device |
| CN109637437A (en) * | 2019-01-30 | 2019-04-16 | 北京凯视达科技有限公司 | Image display control method, device, medium and display screen control system |
| CN113433735A (en) * | 2021-06-29 | 2021-09-24 | 上海摩软通讯技术有限公司 | Backlight module, backlight plate, display screen and electronic equipment |
| US11348542B2 (en) | 2020-05-29 | 2022-05-31 | Shanghai Tianma Micro-electronics Co., Ltd. | Driving method for display device and display device |
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