CN102044220A - Driving method of liquid crystal display (LCD)device - Google Patents
Driving method of liquid crystal display (LCD)device Download PDFInfo
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- CN102044220A CN102044220A CN2009101106017A CN200910110601A CN102044220A CN 102044220 A CN102044220 A CN 102044220A CN 2009101106017 A CN2009101106017 A CN 2009101106017A CN 200910110601 A CN200910110601 A CN 200910110601A CN 102044220 A CN102044220 A CN 102044220A
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Abstract
The invention is applicable to the technical field of display and provides a driving method for a liquid crystal display device. The liquid crystal display device comprises a multiple primary color LED backlight unit and a black and white LCD display unit. The driving method comprises a step of driving the multiple primary color LED backlight unit and a step of driving the black and white LCD display unit, wherein the step of driving the multiple primary color LED backlight unit comprises scanning and turning on all primary color LEDs in the multiple primary color LED backlight unit at different times, and the entire multiple primary color LED backlight unit displays in a single primary color at the same time. In the invention, a mixed color is formed visually by scanning and turning all primary color LEDs in the LED backlight unit at different times, the degree of grey is filtered out by using a black and white liquid crystal screen which is low in cost and simple in production process, and finally, a full-color visual image is produced.
Description
Technical field
The invention belongs to the display technique field, relate in particular to a kind of driving method of liquid crystal indicator.
Background technology
The dimensional requirement of display devices such as high definition television is increasing, and people also increase the requirement of its display quality and power consumption thereupon.
Present liquid crystal indicator adopts the framework of LED-backlit+color LCD panel more, wherein LED-backlit can reduce by 60% work power consumption than existing C CFL cold cathode fluorescent lamp under same gray scale, and do not contain the harmful heavy metal material, energy-conserving and environment-protective, but the color LCD panel is because the existence of color filter film, so that complex manufacturing, cost is higher.
Summary of the invention
The purpose of the embodiment of the invention is to provide a kind of driving method of liquid crystal indicator, with the liquid crystal indicator that adaptive technique is simple, production cost is lower.
The embodiment of the invention is to realize like this, a kind of driving method of liquid crystal indicator, described liquid crystal indicator comprises multi-primary LED back light unit and black and white LCD display unit, described driving method comprises step that drives described multi-primary LED back light unit and the step that drives described black and white LCD display unit, wherein, the step that drives described multi-primary LED back light unit is specially:
Each primary-color LED in the described multi-primary LED back light unit is lighted in timesharing scanning, and described at one time multi-primary LED back light unit integral body is single primary colours and shows.
The embodiment of the invention scans each primary-color LED of lighting in the LED-backlit by timesharing, visually forms blend color, and the employing cost is lower, the simple black-and-white crystal screen of production technology leaches gray shade scale, finally produces full-color visual pattern.
Description of drawings
Fig. 1 is the realization flow figure of the driving method of the liquid crystal indicator that provides of the embodiment of the invention.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer,, the present invention is further elaborated below in conjunction with drawings and Examples.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
In the embodiment of the invention, adopt the framework of the combination realization liquid crystal indicator of multi-primary LED back light unit+black and white LCD display unit, and each the primary-color LED timesharing scanning in the multi-primary LED back light unit is lighted, and back light unit is only lighted a kind of LED of primary colours in the time.
Fig. 1 shows the realization flow of the driving method of the liquid crystal indicator that the embodiment of the invention provides, and details are as follows:
In step S101, drive the multi-primary LED back light unit.
In the embodiment of the invention, liquid crystal indicator comprises multi-primary LED back light unit and black and white LCD display unit, wherein, the LED-backlit unit can be three primary colours, four primary colours, five primary colours even more, primary colours are abundant more, the colour gamut indication range is wide more, concrete driving method is: each primary-color LED in the multi-primary LED back light unit is lighted in timesharing scanning, multi-primary LED back light unit integral body is single primary colours demonstration at one time, with red, green, blue three primary colours are example, can be successively with the red-light LED in the back light unit, green light LED, blue-ray LED is lighted, and lighting order can be partly successively, as red-light LED-green light LED-blue-ray LED, green light LED-red-light LED-blue-ray LED, further, in order to improve contrast, no LED also can be set therein light, as red-light LED-green light LED-" black light "-blue-ray LED, wherein " black light " expression whole LED of moment extinguish.Wherein the signal of multi-primary LED back light unit adopts the transmission of single line static mode, makes the reproduction of color stronger.
In step S102, drive black and white LCD display unit.
In the embodiment of the invention, multi-primary LED back light unit and black and white LCD display unit are the integrated design, wherein the multi-primary LED back light unit is luminous and performance major part image gray-scale level, the auxiliary GTG performance of black and white LCD display unit, and both work in coordination with the performance of finishing image gray-scale level.Therefore driving method is further comprising the steps of:
Calculate the demonstration GTG of described multi-primary LED back light unit and the liquid crystal pixel GTG of described black and white LCD display unit.
Wherein, the multi-primary LED back light unit is divided into a plurality of zones, the GTG that shows in each zone is the maximum demonstration GTG N1 of image corresponding to this zone, in the liquid crystal pixel of black and white LCD display unit in this zone, if high gray is N2, the image gray-scale level that liquid crystal pixel need show is N3, and then this liquid crystal pixel GTG that should be offset is N2-N3.
If we design the GTG of black and white LCD display unit is 8 256 greyscale level, maximum demand shows that GTG is 210 GTGs in a certain backlight area interior pixel point, that multi-primary LED back light unit displayed value is exactly 210 GTGs, with respect to the liquid crystal pixel GTG for the highest by 256, promptly full open mode; And other pixel all needs to recomputate the GTG value in the zone, if wherein a pixel displayed value is 120 greyscale level, and 210-120=90 then, this liquid crystal pixel should be offset light 90 GTGs, is 256-90, finally discharges 120 greyscale level.
In the embodiment of the invention, the multi-primary LED back light unit is lighted each primary-color LED by timesharing scanning, visually forms blend color, and the employing cost is lower, the simple black-and-white crystal screen of production technology leaches gray shade scale, finally produces full-color visual pattern.Wherein the multi-primary LED back light unit is luminous and performance major part image gray-scale level, the auxiliary GTG performance of black and white LCD display unit, and both work in coordination with the table of finishing image gray-scale level.Further,, also can be set " black light " moment that no LED lights therein, also can adopt the signal of single line static mode transmission multi-primary LED back light unit simultaneously, strengthen the color reproduction ability in order to improve contrast.
The above only is preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of being done within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (4)
1. the driving method of a liquid crystal indicator, described liquid crystal indicator comprises multi-primary LED back light unit and black and white LCD display unit, described driving method comprises step that drives described multi-primary LED back light unit and the step that drives described black and white LCD display unit, it is characterized in that the step that drives described multi-primary LED back light unit is specially:
Each primary-color LED in the described multi-primary LED back light unit is lighted in timesharing scanning, and described at one time multi-primary LED back light unit integral body is single primary colours and shows.
2. the driving method of liquid crystal indicator as claimed in claim 1 is characterized in that, described driving method is further comprising the steps of:
Calculate the demonstration GTG of described multi-primary LED back light unit and the liquid crystal pixel GTG of described black and white LCD display unit.
3. the driving method of liquid crystal indicator as claimed in claim 2 is characterized in that, the step of calculating the liquid crystal pixel GTG of the demonstration GTG of described multi-primary LED back light unit and described black and white LCD display unit is specially:
The GTG that shows in each zone of described multi-primary LED back light unit is the maximum demonstration GTG N1 of image corresponding to this zone;
In the liquid crystal pixel of described black and white LCD display unit in this zone, if high gray is N2, the image gray-scale level that liquid crystal pixel need show is N3, and then this liquid crystal pixel GTG that should be offset is N2-N3.
4. the driving method of liquid crystal indicator as claimed in claim 1 is characterized in that, the signal of described multi-primary LED back light unit adopts the transmission of single line static mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101106017A CN102044220A (en) | 2009-10-09 | 2009-10-09 | Driving method of liquid crystal display (LCD)device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009101106017A CN102044220A (en) | 2009-10-09 | 2009-10-09 | Driving method of liquid crystal display (LCD)device |
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| CN102044220A true CN102044220A (en) | 2011-05-04 |
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| CN2009101106017A Pending CN102044220A (en) | 2009-10-09 | 2009-10-09 | Driving method of liquid crystal display (LCD)device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018227865A1 (en) * | 2017-06-12 | 2018-12-20 | 深圳Tcl新技术有限公司 | Liquid crystal display module, and colour generation method and apparatus therefor, and readable storage medium |
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| CN1984303A (en) * | 2005-12-15 | 2007-06-20 | 杨建兴 | Video-frequency signal converter |
| CN101390040A (en) * | 2006-02-27 | 2009-03-18 | 罗伯特.博世有限公司 | Device and method for outputting different images on at least two display units |
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Application publication date: 20110504 |