CN101739984A - 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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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 the 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 and color display method thereof that does not have color film.
Background technology
Present LED (Light Emitting Diode light emitting diode, hereinafter to be referred as LED) backlight in the display technique is generally White LED light source, be provided with the color filter of RGB redgreenblue pixel in its panel, utilize RGB three road signals to control the pairing liquid crystal matrix of three color pixels simultaneously, reach the light transmission capacity of each liquid crystal matrix of control, behind RGB three color pixel color filters, just can obtain required color and brightness.
But, owing to use the White LED backlight must be equipped with RGB three color pixel color filters, the color film that promptly is commonly called as not only makes LCD (Liquid Crystal Display liquid crystal display, abbreviation LCD) material cost is difficult to descend, but also is restricting the raising of liquid crystal resolution and sharpness difficulty; Simultaneously, must light the energy consumption that whole White LED produces also can not be ignored.
Therefore, prior art still haves much room for improvement and develops.
Summary of the invention
The objective of the invention is, be to provide a kind of liquid crystal and color display method thereof that does not have color film, under the situation 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 kind of color display method that does not have color film liquid crystal may further comprise the steps:
A, according to the kind of primary colours in the LED backlight module, the single field frequency cycle is divided into a plurality of primary colours at interval;
B, by backlight drive circuit output multi-channel drive signal, in the cycle, switch to the output of one tunnel drive signal at current described field frequency through the switch handover module, postpone to light the homochromy light emitting diode of each primary colours at interval at times;
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 at last lights, 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 steps A comprises:
In described LED backlight module, two or more primary colours are set, correspondingly are divided into non-isometric described primary colours the described field frequency cycle at interval.
Described method, wherein, described steps A comprises:
Three kinds of primary colours of red, green and blue are set in described LED backlight module, and with the described field frequency cycle be divided under the weight coefficient three primary colours at interval.
Described method, wherein, described step B comprises:
Each described primary colours at interval in, light the corresponding homochromy light emitting diode time to be shorter than this primary colours at interval.
Described method, wherein, described step B comprises:
In each described primary colours interval, primary colours are set and are interrupted, be interrupted the described backlight drive circuit output drive signal of internal cutting off at these primary colours.
Described method, wherein, described step C comprises:
Inserting a field frequency between cycle at adjacent two described field frequencies is interrupted; In being interrupted, this field frequency suspends described backlight drive circuit output drive signal.
A kind of liquid crystal that does not have color film 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 at interval by the kind of primary colours in the described LED backlight module; Output terminal at described backlight drive circuit connects a switch handover module, be used at current described field frequency in the cycle, the drive signal of described backlight drive circuit is switched to one tunnel output, postpone to light the homochromy light emitting diode of LED backlight module described in each primary colours interval at times, show pixel corresponding in the described liquid crystal module to drive; And be used at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in the described LED backlight module postponed to switch to light at last and move forward successively by the primary colours intervening sequences of lighting last time switch the homochromy light emitting diode of all the other primary colours.
Described liquid crystal, wherein, light emitting diode in the described LED backlight module comprises three kinds of primary colours of red, green and blue, described switch handover module is a delay commutation circuit, is used for red, green and blue three tunnel drive signal timesharing of described backlight drive circuit are switched to one tunnel field delay driving signal.
Described liquid crystal, wherein, described switch handover module comprises a primary colours weighting block, is used for described primary colours are carried out adjustment on the duration at interval.
Described liquid crystal, wherein, described switch handover module comprises that primary colours are interrupted module, is used for the drive signal in the described backlight drive circuit output of described primary colours interval internal cutting off.
A kind of liquid crystal and color display method thereof that does not have color film provided by the present invention owing to adopted the technological means that postpones to light color LED backlight at times in order, saved RGB three color pixel color filters, reduced the material cost of liquid crystal; For the panel of same size, improved the resolution and the sharpness of liquid crystal greatly; Simultaneously, because of not needing to light all LED-backlit simultaneously, so also reduced the energy consumption and the thermal value of liquid crystal.
Description of drawings
Fig. 1 is the drive principle synoptic diagram in the color display method of the present invention;
The structure principle schematic of Fig. 2 color film liquid crystal for the present invention does not have.
Embodiment
Below with reference to accompanying drawing, the embodiment and the embodiment of method of the present invention and device thereof described in detail.
A kind of color display method that does not have 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 the LED backlight module, the single field frequency cycle is divided into a plurality of primary colours at interval;
Step S120, by backlight drive circuit output multi-channel drive signal, in the cycle, switch to the output of one tunnel drive signal at current described field frequency through the switch handover module, postpone to light the homochromy light emitting diode of each primary colours at interval at times;
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 at last lights, 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 one tunnel drive signal through the switch handover module, postpone to light each primary-color LED in cycle at times at single field frequency, because the time in single field frequency cycle is shorter, a variation is difficult to discover, and produces needed color and brightness so can drive same LCD pixel.
Among the described step S110, can in described LED backlight module, two or more primary colours be set, correspondingly be divided into non-isometric described primary colours the described field frequency cycle at interval; Three kinds of primary colours of red, green and blue can be set in described LED backlight module, and with the described field frequency cycle be divided under the weight coefficient three primary colours at interval.
This purpose is, based on the visual experience difference to primary colours such as red, green and blues, if be divided into isometric primary colours at interval, can produce polarization in the color impression, and not only weakening, those are not too responsive color such as bluenesss; And those too responsive color such as redness have been strengthened.
Among the described step S120, can each described primary colours at interval in, light the corresponding homochromy light emitting diode time to be shorter than this primary colours at interval; And, in each described primary colours interval, primary colours are set and are interrupted, be interrupted the described backlight drive circuit output drive signal of internal cutting off at these primary colours.Adopt primary colours to be interrupted and to alleviate the colour break-up phenomenon, improve the quality of picture.
Among the described step S130, can insert a field frequency between the cycle at adjacent two described field frequencies and be interrupted; In being interrupted, this field frequency suspends described backlight drive circuit output drive signal.Adopt field frequency to be interrupted the phenomenon that to improve the dynamic image hangover, eliminate and blur, make 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, red drive signal output removes to drive liquid crystal pixel during the n field, and this moment, red LED matrix lighted; Green drive signal output removes to drive liquid crystal pixel during the n+1 field, and this moment, green LED matrix lighted; Blue drive signal output removes to drive liquid crystal pixel during the n+2 field, and this moment, blue LED matrix lighted; Three is a circulation, and timesharing drives the same pixel on the liquid crystal in turn, just obtains the blend color effect that three form and aspect add.Owing to do not re-use RGB three color pixel color filters, not only improved optical efficiency, but also obtained under the same size panel to Duo three times resolution than the color filter pattern, improved the sharpness of liquid crystal greatly.
Correspondingly, a kind of liquid crystal that does not have 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 at interval by the kind of primary colours in the described LED backlight module; Output terminal at described backlight drive circuit connects a switch handover module, be used at current described field frequency in the cycle, the drive signal of described backlight drive circuit is switched to one tunnel output, postpone to light the homochromy light emitting diode of LED backlight module described in each primary colours interval at times, show pixel corresponding in the described liquid crystal module to drive; And be used at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in the described LED backlight module postponed to switch to light at last and move forward successively by the primary colours intervening sequences of lighting last time switch the homochromy light emitting diode of all the other primary colours.
As preferred embodiment of the present invention, light emitting diode in the described LED backlight module comprises three kinds of primary colours of red, green and blue, described switch handover module is a delay commutation circuit, is used for red, green and blue three tunnel drive signal timesharing of described backlight drive circuit are switched to one tunnel field delay driving signal.
Be preferably, described switch handover module comprises a primary colours weighting block, is used for described primary colours are carried out adjustment on the duration at interval.For example, can be according to the wavelength difference of red, green, blue etc., with separately primary colours at interval duration multiply by different weight coefficients respectively and adjust, to improve the expressive force of color.
Be preferably, described switch handover module comprises that primary colours are interrupted module, is used for the drive signal in the described backlight drive circuit output of described primary colours interval internal cutting off, to alleviate the phenomenon of colour break-up.
Be preferably, described switch handover module comprises that a field frequency is interrupted module, is used for suspending described backlight drive circuit output drive signal to improve the phenomenon of dynamic image hangover in this field frequency is interrupted.
As shown in Figure 2, adopt three looks independent controlled quick response led array backlight to cancel three-color filter more earlier, cost reduces, and sharpness improves three times; To originally independently at last, three road rgb signals remove to control each self-corresponding liquid crystal array, change RGB (RGB) signal into and drive one tunnel pixel by the order of scanning field, that is: the led array backlight is pressed RGB (RGB) tristimulus signal correspondence scanning field separately, goes to drive the pixel that shows correspondence by the field scan order.
For example: for the same pixel on the liquid crystal, the red LED of led array backlight is corresponded to the n field scan by well-illuminated when R (red) signal arrives; The green LED of led array backlight is corresponded to the n+1 field scan by well-illuminated when G (green) signal arrives; The blue led of led array backlight is corresponded to the n+2 field scan by well-illuminated when B (indigo plant) signal arrives, and this pixel has just experienced the field sequence driving of RGB (RGB) tristimulus signal like this, and mixes the needed color of formation; The red, green, blue signal that successively sends is lighted RGB-LED in chronological order respectively, controls pixel corresponding on the liquid crystal simultaneously, make its this color the intensity that should have open liquid crystal.Owing to no longer need RGB three color pixel color filters, also all LED in the well-illuminated module backlight have simultaneously 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 of band color filter, the driving frequency of field-sequential method drive pattern need improve more than three times.
Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection domain of claims of the present invention.
Claims (10)
1. color display method that does not have color film liquid crystal may further comprise the steps:
A, according to the kind of primary colours in the LED backlight module, the single field frequency cycle is divided into a plurality of primary colours at interval;
B, by backlight drive circuit output multi-channel drive signal, in the cycle, switch to the output of one tunnel drive signal at current described field frequency through the switch handover module, postpone to light the homochromy light emitting diode of each primary colours at interval at times;
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 at last lights, 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 steps A comprises:
In described LED backlight module, two or more primary colours are set, correspondingly are divided into non-isometric described primary colours the described field frequency cycle at interval.
3. method according to claim 1 and 2 is characterized in that, described steps A comprises:
Three kinds of primary colours of red, green and blue are set in described LED backlight module, and with the described field frequency cycle be divided under the weight coefficient three primary colours at interval.
4. method according to claim 1 is characterized in that, described step B comprises:
Each described primary colours at interval in, light the corresponding homochromy light emitting diode time to be shorter than this primary colours at interval.
5. method according to claim 4 is characterized in that, described step B comprises:
In each described primary colours interval, primary colours are set and are interrupted, be interrupted the described backlight drive circuit output drive signal of internal cutting off at these primary colours.
6. method according to claim 1 is characterized in that, described step C comprises:
Inserting a field frequency between cycle at adjacent two described field frequencies is interrupted; In being interrupted, this field frequency suspends described backlight drive circuit output drive signal.
7. a liquid crystal that does not have color film comprises a liquid crystal module, a LED backlight module and a backlight drive circuit; It is characterized in that the kind of the single field frequency cycle of described liquid crystal module by primary colours in the described LED backlight module is divided into a plurality of non-isometric primary colours at interval; Output terminal at described backlight drive circuit connects a switch handover module, be used at current described field frequency in the cycle, the drive signal of described backlight drive circuit is switched to one tunnel output, postpone to light the homochromy light emitting diode of LED backlight module described in each primary colours interval at times, show pixel corresponding in the described liquid crystal module to drive; And be used at the next time of described field frequency in the cycle, the homochromy light emitting diode of lighting at first in the described LED backlight module postponed to switch to light at last and move forward successively by the primary colours intervening sequences of lighting last time switch the homochromy light emitting diode of all the other primary colours.
8. liquid crystal according to claim 7, it is characterized in that, light emitting diode in the described LED backlight module comprises three kinds of primary colours of red, green and blue, described switch handover module is a delay commutation circuit, is used for red, green and blue three tunnel drive signal timesharing of described backlight drive circuit are switched to one tunnel field delay driving signal.
9. according to claim 7 or 8 described liquid crystal, it is characterized in that described switch handover module comprises a primary colours weighting block, be used for described primary colours are carried out adjustment on the duration at interval.
10. according to claim 7 or 8 described liquid crystal, it is characterized in that described switch handover module comprises that primary colours are interrupted module, be used for drive signal in the described backlight drive circuit output of described primary colours interval internal cutting off.
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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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| CN102903339A (en) * | 2012-10-26 | 2013-01-30 | 合肥京东方光电科技有限公司 | Control method and device of backlight source of display 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 |
| CN107871478A (en) * | 2017-12-26 | 2018-04-03 | 深圳Tcl新技术有限公司 | Drive circuit, method and the display device of display module |
| CN108646412A (en) * | 2018-05-10 | 2018-10-12 | 京东方科技集团股份有限公司 | Nearly eye display device and nearly eye display methods |
| WO2018192298A1 (en) * | 2017-04-20 | 2018-10-25 | 京东方科技集团股份有限公司 | Display apparatus and display method |
| CN110673388A (en) * | 2019-10-15 | 2020-01-10 | 京东方科技集团股份有限公司 | Display panel, display method thereof and display device |
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| JP4415386B2 (en) * | 2005-02-28 | 2010-02-17 | セイコーエプソン株式会社 | Image display method, image display processing program, and image display apparatus |
| CN1866344A (en) * | 2005-05-18 | 2006-11-22 | 深圳大学 | Color sequential liquid crystal display |
| JP2007114628A (en) * | 2005-10-24 | 2007-05-10 | Rohm Co Ltd | Backlight device and image display device using the same |
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| CN107871478A (en) * | 2017-12-26 | 2018-04-03 | 深圳Tcl新技术有限公司 | Drive circuit, method and the display device of display module |
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