CN101739984B - Liquid crystal without color film and color displaying method thereof - Google Patents
Liquid crystal without color film and color displaying method thereof Download PDFInfo
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- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 52
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- 239000003086 colorant Substances 0.000 claims abstract description 69
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- 206010019133 Hangover Diseases 0.000 description 2
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Abstract
The invention discloses a liquid crystal without a color film and a color displaying method thereof. The method comprises the following steps of: dividing a single field frequency period into a plurality of primary color intervals according to the type of the primary color in an LED backlight module, outputting a multipath driving signal by a backlight driving circuit, switching to one-way driving signal output by a switch module and timesharing delaying to lighten the LEDs having a same color in respective primary color interval in the current field frequency period, and in the next field frequency period, lastly lightening the LED which is lightened firstly in the last field frequency period and the LEDs having the same color of other primary colors are orderly lightened by forward shifting the last lightened sequence of the primary color intervals. The technique of timesharing orderly delaying lightening color LED backlight is used, so RGB three-color pixel filter is saved and the cost of the raw material of the liquid crystal is lowered. Aiming at the panels having the same size, the resolution ratio and the definition of the liquid crystal are greatly improved. The energy consumption and the heat productivity of the liquid crystal are decreased because all the LED backlights need not be lightened simultaneously.
Description
Technical field
The present invention relates to liquid crystal and the color display method field thereof of LED-type backlight, in particular, what improvement related to is a kind of liquid crystal without color film and color display method thereof.
Background technology
Current LED (Light Emitting Diode light emitting diode, hereinafter to be referred as LED) backlight in display technique is generally White LED light source, in its panel, be provided with the color filter of RGB redgreenblue pixel, utilize RGBSan road signal to control the corresponding liquid crystal matrix of three color pixels simultaneously, reach the light transmission capacity of controlling each liquid crystal matrix, after RGB tri-color pixel color filters, just can obtain required color and brightness.
But, owing to using White LED backlight must be equipped with RGB tri-color pixel color filters, the color film being commonly called as, not only make LCD (Liquid Crystal Display liquid crystal display, abbreviation LCD) material cost is difficult to decline, but also is restricting the raising of liquid crystal resolution and sharpness difficulty; Meanwhile, must light the energy consumption that whole White LEDs produce also can not be ignored.
Therefore, prior art still haves much room for improvement and develops.
Summary of the invention
The object of the invention is, be to provide a kind of liquid crystal without color film and color display method thereof, the in the situation that of same size panel, can reduce the material cost of liquid crystal, can improve liquid crystal resolution, promote its sharpness, and can lack the energy consumption of LED-backlit.
Technical scheme of the present invention is as follows:
A color display method without color film liquid crystal, comprises the following steps:
A, according to the kind of primary colours in LED backlight module, three kinds of primary colours of red, green and blue are set in described LED backlight module, the single field frequency cycle is divided into three primary colours intervals under weight coefficient;
B, by backlight drive circuit output multi-channel, drive signal, at current described field frequency, in the cycle, through switching over module, switch to a road and drive signal output, postpone to light at times the homochromy light emitting diode in each primary colours interval;
C, at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first last time is deferred to finally and is lighted, the homochromy light emitting diode of all the other primary colours moves forward successively by the primary colours intervening sequences of lighting last time.
Described method, wherein, described step B comprises:
Described in each in primary colours interval, light the corresponding homochromy light emitting diode time to be shorter than this primary colours interval, primary colours are set in primary colours interval described in each and are interrupted, at these primary colours, be interrupted backlight drive circuit output drive signal described in internal cutting off.
Described method, wherein, described step C comprises:
At field frequency described in adjacent two, inserting a field frequency between the cycle is interrupted; Within being interrupted, this field frequency suspends described backlight drive circuit output drive signal.
Without a liquid crystal for color film, comprise a liquid crystal module, a LED backlight module and a backlight drive circuit; Wherein, output terminal at described backlight drive circuit connects a switching over module, be used at current field frequency in the cycle, the driving signal of described backlight drive circuit is switched to a road output, postpone to light at times the homochromy light emitting diode of LED backlight module described in each primary colours interval, to drive, show pixel corresponding in described liquid crystal module; And at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in described LED backlight module is postponed to be switched to finally to light, and move forward successively and switch the homochromy light emitting diode of all the other primary colours by the primary colours intervening sequences of lighting last time; Described switching over module comprises a primary colours weighting block, for the single field frequency cycle of described liquid crystal module is divided into three primary colours intervals under weight coefficient according to three kinds of primary colours of described LED backlight module red, green and blue.
Described liquid crystal, wherein, described switching over module is a delay commutation circuit, for driving signal timesharing to switch to field, a road delay driving signal on the red, green and blue of described backlight drive circuit three tunnels.
Described liquid crystal, wherein, described switching over module comprises that a field frequency is interrupted module, for suspend described backlight drive circuit output drive signal within this field frequency is interrupted.
Described liquid crystal, wherein, described switching over module comprises that primary colours are interrupted module, for the driving signal in backlight drive circuit output described in the interval internal cutting off of described primary colours.
A kind of liquid crystal without color film provided by the present invention and color display method thereof, postpone to light the technological means of color LED backlight at times in order owing to having adopted, and saved RGB tri-color pixel color filters, reduced the material cost of liquid crystal; For the panel of same size, greatly improved resolution and the sharpness of liquid crystal; Meanwhile, because do not need to light all LED-backlit simultaneously, therefore also reduced energy consumption and the thermal value of liquid crystal.
Accompanying drawing explanation
Fig. 1 is the drive principle schematic diagram in color display method of the present invention;
Fig. 2 is that the present invention is without the structure principle schematic of color film liquid crystal.
Embodiment
Below with reference to accompanying drawing, the embodiment of method of the present invention and device thereof and embodiment are described in detail.
A kind of color display method without color film liquid crystal of the present invention, one of its embodiment, comprises the steps:
Step S110, according to the kind of primary colours in LED backlight module, the single field frequency cycle is divided into a plurality of primary colours interval;
Step S120, by backlight drive circuit output multi-channel, drive signal, at current described field frequency, in the cycle, through switching over module, switch to a road and drive signal output, postpone to light at times the homochromy light emitting diode in each primary colours interval;
Step S130, at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first last time is deferred to finally and is lighted, the homochromy light emitting diode of all the other primary colours moves forward successively by the primary colours intervening sequences of lighting last time.
Multi-channel drive signal originally switches to a road through switching over module and drives signal, at single field frequency, in the cycle, postpone to light at times each primary-color LED, because the time in single field frequency cycle is shorter, a variation is difficult to discover, therefore can drive same LCD pixel to produce needed color and brightness.
In described step S110, can in described LED backlight module, two or more primary colours be set, be correspondingly divided into non-isometric described primary colours interval the described field frequency cycle; Three kinds of primary colours of red, green and blue can be set in described LED backlight module, and the described field frequency cycle is divided into three primary colours intervals under weight coefficient.
This object is, the visual experience based on to primary colours such as red, green and blues is different, if be divided into isometric primary colours interval, in color impression, can produce polarization, and not only weakening those is not that too responsive color is as blueness; And those too responsive colors have been strengthened as redness.
In described step S120, can be described in each in primary colours interval, light the corresponding homochromy light emitting diode time to be shorter than this primary colours interval; And, primary colours are set in primary colours interval described in each and are interrupted, at backlight drive circuit output drive signal described in this primary colours interruption internal cutting off.Adopt primary colours to be interrupted and can alleviate colour break-up phenomenon, improve the quality of picture.
In described step S130, can between the cycle, insert a field frequency at field frequency described in adjacent two and be interrupted; Within being interrupted, this field frequency suspends described backlight drive circuit output drive signal.Adopt field frequency to be interrupted the phenomenon that can improve dynamic image hangover, deblurring, makes picture more clear.
For example, for the LED-backlit module of three kinds of primary colours of red, green and blue, as shown in Figure 1, during n field, red driving signal output removes to drive liquid crystal pixel, and now red LED matrix lights; During n+1 field, green driving signal output removes to drive liquid crystal pixel, and now green LED matrix lights; During n+2 field, the output of blue driving signal removes to drive liquid crystal pixel, and now blue LED matrix lights; Three is a circulation, and timesharing drives the same pixel on liquid crystal in turn, just obtains the blend color effect that three form and aspect add.Owing to not re-using RGB tri-color pixel color filters, not only improved optical efficiency, but also obtained under same size panel than the resolution of many three times of color filter pattern, greatly improved the sharpness of liquid crystal.
Correspondingly, a kind of liquid crystal without color film of the present invention, one of its embodiment, comprises a liquid crystal module, a LED backlight module and a backlight drive circuit; Wherein, the single field frequency cycle of described liquid crystal module is divided into a plurality of non-isometric primary colours intervals by the kind of primary colours in described LED backlight module; Output terminal at described backlight drive circuit connects a switching over module, be used at current described field frequency in the cycle, the driving signal of described backlight drive circuit is switched to a road output, postpone to light at times the homochromy light emitting diode of LED backlight module described in each primary colours interval, to drive, show pixel corresponding in described liquid crystal module; And at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in described LED backlight module is postponed to be switched to finally to light, and move forward successively and switch the homochromy light emitting diode of all the other primary colours by the primary colours intervening sequences of lighting last time.
As preferred embodiment of the present invention, light emitting diode in described LED backlight module comprises three kinds of primary colours of red, green and blue, described switching over module is a delay commutation circuit, for driving signal timesharing to switch to field, a road delay driving signal on the red, green and blue of described backlight drive circuit three tunnels.
Be preferably, described switching over module comprises a primary colours weighting block, for the adjustment on duration is carried out in described primary colours interval.For example, can be different according to the wavelength of red, green, blue etc., primary colours interval duration is separately multiplied by respectively to different weight coefficients adjust, to improve the expressive force of color.
Be preferably, described switching over module comprises that primary colours are interrupted module, for the driving signal in backlight drive circuit output described in the interval internal cutting off of described primary colours, to alleviate the phenomenon of colour break-up.
Be preferably, described switching over module comprises that a field frequency is interrupted module, for suspending described backlight drive circuit output drive signal to improve the phenomenon of dynamic image hangover within this field frequency is interrupted.
As shown in Figure 2, first adopt three looks independent controlled quick response LED array backlight to cancel again three-color filter, cost, sharpness improves three times; Finally incite somebody to action originally independently three road rgb signals and removed to control each self-corresponding liquid crystal array, changing RGB(RGB into) signal drives a road pixel by the order of scanning field, that is: LED array backlight is pressed RGB (RGB) tristimulus signal correspondence scanning field separately, goes the pixel that drives demonstration corresponding by field scan order.
For example: for the same pixel on liquid crystal, when R(red) red LED of signal LED array backlight while arriving is by well-illuminated, corresponds to n field scan; When G(green) green LED of signal LED array backlight while arriving is by well-illuminated, corresponds to n+1 field scan; When B(blue) blue led of signal LED array backlight while arriving is by well-illuminated, corresponds to n+2 field scan, the field sequence that this pixel has just experienced RGB (RGB) tristimulus signal like this drives, and is mixed to form needed color; The red, green, blue signal successively sending is lighted respectively RGB-LED in chronological order, controls pixel corresponding on liquid crystal simultaneously, makes its intensity that should have in this color open liquid crystal.Owing to no longer needing RGB tri-color pixel color filters, also all LED in well-illuminated backlight module simultaneously, have not only reduced the material cost of liquid crystal, but also have greatly reduced the energy consumption of backlight; But compare with the drive pattern with color filter, the driving frequency of field-sequential method drive pattern need to improve more than three times.
Should be understood that, for those of ordinary skills, can be improved according to the above description or convert, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (7)
1. without a color display method for color film liquid crystal, comprise the following steps:
A, according to the kind of primary colours in LED backlight module, three kinds of primary colours of red, green and blue are set in described LED backlight module, the single field frequency cycle is divided into three primary colours intervals under weight coefficient;
B, by backlight drive circuit output multi-channel, drive signal, at current described field frequency, in the cycle, through switching over module, switch to a road and drive signal output, postpone to light at times the homochromy light emitting diode in each primary colours interval;
C, at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first last time is deferred to finally and is lighted, the homochromy light emitting diode of all the other primary colours moves forward successively by the primary colours intervening sequences of lighting last time.
2. method according to claim 1, is characterized in that, described step B comprises:
Described in each in primary colours interval, light the corresponding homochromy light emitting diode time to be shorter than this primary colours interval, primary colours are set in primary colours interval described in each and are interrupted, at these primary colours, be interrupted backlight drive circuit output drive signal described in internal cutting off.
3. method according to claim 1, is characterized in that, described step C comprises:
At field frequency described in adjacent two, inserting a field frequency between the cycle is interrupted; Within being interrupted, this field frequency suspends described backlight drive circuit output drive signal.
4. without a liquid crystal for color film, comprise a liquid crystal module, a LED backlight module and a backlight drive circuit; It is characterized in that, output terminal at described backlight drive circuit connects a switching over module, be used at current field frequency in the cycle, the driving signal of described backlight drive circuit is switched to a road output, postpone to light at times the homochromy light emitting diode of LED backlight module described in each primary colours interval, to drive, show pixel corresponding in described liquid crystal module; And at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in described LED backlight module is postponed to be switched to finally to light, and move forward successively and switch the homochromy light emitting diode of all the other primary colours by the primary colours intervening sequences of lighting last time; Described switching over module comprises a primary colours weighting block, for the single field frequency cycle of described liquid crystal module is divided into three primary colours intervals under weight coefficient according to three kinds of primary colours of described LED backlight module red, green and blue.
5. liquid crystal according to claim 4, is characterized in that, described switching over module is a delay commutation circuit, for driving signal timesharing to switch to field, a road delay driving signal on the red, green and blue of described backlight drive circuit three tunnels.
6. according to the liquid crystal described in claim 4 or 5, it is characterized in that, described switching over module comprises that a field frequency is interrupted module, for suspend described backlight drive circuit output drive signal within this field frequency is interrupted.
7. according to the liquid crystal described in claim 4 or 5, it is characterized in that, described switching over module comprises that primary colours are interrupted module, for the driving signal in backlight drive circuit output described in the interval internal cutting off of described primary colours.
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| CN200910188980.1A CN101739984B (en) | 2009-12-16 | 2009-12-16 | Liquid crystal without color film and color displaying method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102903339B (en) * | 2012-10-26 | 2015-12-02 | 合肥京东方光电科技有限公司 | The control method of backlight sources of display device and control device |
| CN104315409A (en) * | 2014-10-15 | 2015-01-28 | 合肥美的电冰箱有限公司 | Backlight module, method for producing colored lights by backlight module and display |
| CN105700237A (en) * | 2016-04-13 | 2016-06-22 | 深圳市华星光电技术有限公司 | Quick-response liquid crystal display device and manufacturing method thereof |
| CN106873244B (en) * | 2017-04-20 | 2019-10-25 | 京东方科技集团股份有限公司 | A kind of display device and display methods |
| CN107871478B (en) * | 2017-12-26 | 2020-11-13 | 深圳Tcl新技术有限公司 | Driving circuit and method of display module and display equipment |
| CN108646412B (en) * | 2018-05-10 | 2021-05-14 | 京东方科技集团股份有限公司 | Near-eye display device and near-eye display method |
| CN109712588B (en) | 2019-02-25 | 2021-04-02 | 京东方科技集团股份有限公司 | Gray scale adjusting method and device and display device |
| CN110673388B (en) * | 2019-10-15 | 2023-01-31 | 京东方科技集团股份有限公司 | Display panel, display method thereof and display device |
| CN111538181A (en) * | 2020-06-05 | 2020-08-14 | 京东方科技集团股份有限公司 | Electronic device and driving method thereof |
| CN114063342B (en) | 2020-07-31 | 2023-06-30 | 京东方科技集团股份有限公司 | Display device, display control method and control device |
| CN114815348B (en) | 2021-01-28 | 2023-11-17 | 北京京东方光电科技有限公司 | Display device and driving method thereof |
| CN113362776A (en) * | 2021-06-30 | 2021-09-07 | 北京京东方光电科技有限公司 | Field sequence display device, control method and display equipment |
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| CN1828700A (en) * | 2005-02-28 | 2006-09-06 | 精工爱普生株式会社 | Image display method, image display processing program, and image display apparatus |
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