CN104795052B - RGBW signal conversion methods and system - Google Patents

RGBW signal conversion methods and system Download PDF

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CN104795052B
CN104795052B CN201510247061.2A CN201510247061A CN104795052B CN 104795052 B CN104795052 B CN 104795052B CN 201510247061 A CN201510247061 A CN 201510247061A CN 104795052 B CN104795052 B CN 104795052B
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CN104795052A (en
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刘磊
宋嘉嘉
董殿正
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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BOE Technology Group Co Ltd
Beijing BOE Display Technology Co Ltd
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Abstract

The present invention relates to display technology field, discloses a kind of RGBW signal conversion methods, including：To a pixel on display panel, the sub-pix X signal lacked is judged, X represents one of R, G, B and W；According to respective grey decision-making R in input signalin、GinAnd BinCalculate respective grey decision-making R in output signalout、Gout、BoutAnd Wout；By X corresponding to the XoutGrey decision-making is reset, and generates the XoutGrey decision-making be 0 output signal, the XoutRepresent Rout、Gout、BoutAnd WoutOne of them.The invention also discloses a kind of RGBW signal translating systems.The present invention, which realizes, neither increases the RGBW signals conversion that sub-pix number and can keeps display resolution.

Description

RGBW signal conversion methods and system
Technical field
The present invention relates to display technology field, more particularly to a kind of RGBW signal conversion methods and system.
Background technology
With current display panel resolution ratio more and more higher, PPI (Pixels Per Inch) more and more higher, make panel Transmitance is more and more lower, significantly increases the manufacturing cost of panel.So RGBW algorithms obtain more and more extensive application.
Traditional RGBW signal conversion methods are to export the rgb signal conversion RGBW data of input, every on display panel The more W sub-pixs of individual pixel, cause the sub-pix number of display panel to be changed into original 4/3 times.I.e. traditional RGBW methods That each pixel has four sub-pixs, be respectively R G B W, have the situations of three sub-pixs (R/G/B) relative to each pixel, To maintain same resolution ratio, it is necessary to increase the number of sub-pix, panel size can become big；If in the face of identical size On plate, resolution ratio will reduce.
In another approach, can selectivity delete some RGBW sub-pixels, although such a framework can avoid it is above-mentioned Problem, but distortion when can bring display, reduce display quality.
The content of the invention
(1) technical problems to be solved
The technical problem to be solved in the present invention is：Realize that a kind of sub-pix number and can that neither increases keeps display resolution RGBW signal conversion methods.
(2) technical scheme
In order to solve the above technical problems, the invention provides a kind of RGBW signal conversion methods, including：
To a pixel on display panel, judge that the sub-pix X, X that lack represent one of R, G, B and W；
By such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd BinCalculate respective ash in output signal Rank value Rout、Gout、BoutAnd Wout：
Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is to take minimum value letter Number, W ' is intermediate variable；
By X corresponding to the XoutGrey decision-making is reset, and generates the XoutGrey decision-making be 0 output signal, the XoutRepresent Rout、Gout、BoutAnd WoutOne of them.
Wherein, R is calculatedout、Gout、BoutAnd WoutAfterwards, the XoutGrey decision-making also includes before resetting：
Judging XoutWhen grey decision-making is not 0, by the X of the pixeloutGrey decision-making is distributed to by predetermined allocation rule and institute State the X of the sub-pix X in the two neighboring pixel of pixelout。
Wherein, shown in the predetermined allocation rule such as formula (2)：
Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the first phase after distribution The sub-pix X of adjacent pixel output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For the output grey decision-making of the sub-pix X of the second adjacent pixel after distribution.
Wherein, sub-pix is shaped as rectangle, the X by the pixeloutGrey decision-making is by the predetermined allocation rule distribution Give the X of the sub-pix X in the two neighboring pixel of the pixeloutSpecifically include：If two adjacent pixels of the pixel or so Sub-pix X is included, then by the X of the pixeloutGrey decision-making is distributed to and the two neighboring picture in left and right by the predetermined allocation rule The X of sub-pix X in elementout, otherwise distribute to the X of the sub-pix X in neighbouring two pixelsout, wherein, left and right is adjacent fixed Justice is adjacent for sub-pix short side straight line place direction, neighbouring to be defined as the adjacent of sub-pix long side straight line place direction.
Wherein, when the grey decision-making W ' of the intermediate variable is less than GTG threshold value M, α<1, when input grey decision-making is more than M When, α>1.
Wherein, the λ values are：1<λ<(2n- 1)/Max (R '-W ', G '-W ', B '-W '), wherein Max are to take maximum Function, the n are the bit depth for representing color.
Wherein, the value of the β is：1<β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
Present invention also offers a kind of RGBW signal translating systems, including：
Sub-pix judging unit, for the sub-pix X for a pixel on display panel, judging to lack, X represent R, G, One of B and W；
Grey decision-making computing unit, for by such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd BinMeter Calculate respective grey decision-making R in output signalout、Gout、BoutAnd Wout：
Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is to take minimum value letter Number, W ' is intermediate variable；
Output signal generation unit, for by X corresponding to the XoutGrey decision-making is reset, and generation does not include the XoutGTG The output signal of value, the XoutRepresent Rout、Gout、BoutAnd WoutOne of them.
Wherein, in addition to：
Grey decision-making allocation unit, for judging XoutBy the X of the pixel when grey decision-making is not 0outGrey decision-making is by predetermined Allocation rule distributes to the X with the sub-pix X in the two neighboring pixel of the pixelout。
Wherein, shown in the predetermined allocation rule such as formula (2)：
Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the first phase after distribution The sub-pix X of adjacent pixel output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For the output grey decision-making of the sub-pix X of the second adjacent pixel after distribution.
Wherein, sub-pix is shaped as rectangle, if the grey decision-making allocation unit is adjacent specifically for the pixel or so Two pixels include sub-pix X, then by the X of the pixeloutGrey decision-making is distributed to and left and right phase by the predetermined allocation rule The X of sub-pix X in adjacent two pixelsout, otherwise distribute to the X of the sub-pix X in neighbouring two pixelsout, wherein, it is left The right side is adjacent to be defined as the adjacent of sub-pix short side straight line place direction, neighbouring direction where being defined as sub-pix long side straight line It is adjacent.
Wherein, when the grey decision-making W ' of the intermediate variable is less than GTG threshold value M, α<1, when input grey decision-making is more than M When, α>1.
Wherein, the λ values are：1<λ<(2n- 1)/Max (R '-W ', G '-W ', B '-W '), wherein Max are to take maximum Function, the n are the bit depth for representing color.
Wherein, the value of the β is：1<β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
(3) beneficial effect
The RGBW signal conversion methods and system of the present invention includes R, G, B and W by the way that the rgb signal of input is converted into The signal for three colors of anticipating correspond to the pixel for include any three color sub-pixs of R, G, B and W on display panel, so that reality Having showed neither increases the RGBW signals conversion that sub-pix number and can keeps display resolution.
Brief description of the drawings
(a) is traditional RGB sub-pixel structure pel array schematic diagrams in Fig. 1, and (b) is to include RGBW wherein three colors Sub-pix pel array schematic diagram；
Fig. 2 is a kind of RGBW signal conversion methods flow chart of the embodiment of the present invention；
Fig. 3 is a kind of RGBW signal translating systems structural representation of the embodiment of the present invention.
Embodiment
With reference to the accompanying drawings and examples, the embodiment of the present invention is described in further detail.Implement below Example is used to illustrate the present invention, but is not limited to the scope of the present invention.
As shown in figure 1, wherein (a) is traditional RGB sub-pixel structure pel array schematic diagrams, (b) be include RGBW its In three colors sub-pix pel array schematic diagram, as the first row pixel includes pixel RGB, WRG, BWR and GBW respectively. (b) this array structure had both included W sub-pixs, and again without total number of pixels is reduced, resolution ratio is unaffected.This hair It is bright to provide a kind of signal that rgb signal is converted into adapting to the display panel in Fig. 1 shown in (b).Therefore, RGBW of the invention Signal conversion method is the signal that the rgb signal of input is converted into WRG, BWR and GBW, and its idiographic flow is as shown in Fig. 2 bag Include：
Step S210, to a pixel on display panel, judge the sub-pix X signal lacked, X represents R, G, B and W One of them.GBW signals are such as converted into, then X represents R.Can be according to obtaining current picture in the parameter of display panel in itself during judgement Which sub-pix element includes, relevant with scanning sequency and panel RGBW arrangements.That is in Fig. 1 (b) this panel, For the 4th (i-1)+1 Lieque of the first row it is few be W, the 4th (i-1)+2 Lieques it is few be B, the 4th (i-1)+3 Lieques are few G, the 4th (i-1)+4 Lieques it is few be R, i=1,2,3 ....For the 4th (i-1)+1 Lieque of the second row it is few be G, 4 (i-1)+2 Lieques it is few be R, the 4th (i-1)+3 Lieques it is few be W, the 4th (i-1)+4 Lieques it is few be B.Two one weeks of row Phase, to the last a line is circulated successively.
Step S220, by such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd BinCalculate output signal In respective grey decision-making Rout、Gout、BoutAnd Wout：
Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is to take minimum value letter Number, W ' is intermediate variable.
Step S230, by X corresponding to the XoutGrey decision-making is reset, and generates XoutGrey decision-making is 0 output signal, described XoutRepresent Rout、Gout、BoutAnd WoutOne of them.Such as be converted into GBW signals, if input rgb signal in R grey decision-making Rin Minimum, then R is understood by formula (1)outFor 0, just by Gout, BoutAnd WoutGenerate GBW signals.
The RGBW signal conversion methods of the present invention include any three of R, G, B and W by the way that the rgb signal of input is converted into The signal of color corresponds to the pixel comprising any three color sub-pixs of R, G, B and W on display panel (such as：WRG, BWR and GBW), it is achieved thereby that neither increasing the RGBW signals conversion that sub-pix number and can keeps display resolution.
After by the respective output GTG of formula (1) generation, XoutGrey decision-making may not be 0, such as be converted into GBW signals, but The R finally calculatedoutIt is not 0, it can be understood as the pixel needs the comparison of ingredients of the red color shown big, and GBW picture Plain and no corresponding R sub-pixs, if now by RoutReset, then show that color can be affected.Therefore, further, counting Calculate Rout、Gout、BoutAnd WoutAfterwards, XoutAlso include before resetting：Judging XoutBy the pixel when grey decision-making is not 0 XoutGrey decision-making is distributed to the X with the sub-pix X in the two neighboring pixel of the pixel by predetermined allocation ruleout.I.e. by suitable There is the X display colors of X sub-pixs around increase, to reduce the influence to showing color.
In the present embodiment, predetermined allocation rule includes：As shown in formula (2)：
Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the first phase after distribution The sub-pix X of adjacent pixel output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For the output grey decision-making of the sub-pix X of the second adjacent pixel after distribution.
Further, the X by the pixeloutGrey decision-making is distributed to adjacent with the pixel by predetermined allocation rule The X of sub-pix X in two pixelsoutSpecifically include：If two adjacent pixels of the pixel or so include sub-pix X, By the X of the pixeloutGrey decision-making is distributed to the X with the sub-pix X in the two neighboring pixel in left and right by predetermined allocation ruleout, Otherwise the X of the sub-pix X in neighbouring two pixels is distributed toout, wherein, left and right is adjacent to be defined as sub-pix short side straight line Place direction it is adjacent, it is neighbouring to be defined as the adjacent of direction where sub-pix long side straight line.Sub-pix is rectangle, for short Edge direction human eye does not allow borrowing for color easy to identify.
Wherein, when the grey decision-making W ' of the intermediate variable is less than GTG threshold value M, α=A, when input grey decision-making is more than M When, α=B, A<1, B>1.M can make a reservation for into 50, that is, 50 GTGs, and M, A and B value can pass through the panel of reality Situation adjusts, in order to adjusts contrast, reduces low gray-scale intensity, improves high gray brightness.
Wherein, the λ values are：1<λ<(2n- 1)/Max (R '-W ', G '-W ', B '-W '), wherein Max are to take maximum Function, the n are the bit depth for representing color.
Wherein, the value of the β is：1<β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
It is B in its input signal if above-mentioned RGB turns in GBW exampleinMinimum, by formula (1), BoutIt is then 0, now, Can be by above-mentioned allocation rule：Xout1=(2/3) Xout11+(1/3)Xout, Xout2=(2/3) Xout22+(1/3)Xout, from adjacent pixel BoutObtain the B of this pixelout。
For the rgb pixel in display panel, the rgb signal of input can also be turned in the way of the embodiment of the present invention Change, the W that will be changed outoutClearing.Certainly can also be by above-mentioned allocation rule by W before resettingoutDistribute to adjacent pixel Wout。
Present invention also offers a kind of RGBW signal translating systems, as indicated at 3, including：
Sub-pix judging unit 310, for a pixel on display panel, judging the sub-pix X signal lacked, X represents one of R, G, B and W.
Grey decision-making computing unit 330, for by such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd Bin Calculate respective grey decision-making R in output signalout、Gout、BoutAnd Wout：
Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is letter of minimizing Number, W ' is intermediate variable.
Output signal generation unit 330, for by X corresponding to the XoutGrey decision-making is reset, and generates the XoutGrey decision-making For 0 output signal, the XoutRepresent Rout、Gout、BoutAnd WoutOne of them.
Further, the system also includes：
Grey decision-making allocation unit 340, for judging XoutBy the X of the pixel when grey decision-making is not 0outGrey decision-making is by pre- Set pattern then distributes to the X with the sub-pix X in the two neighboring pixel of the pixelout。
Wherein, the predetermined allocation rule includes：As shown in formula (2)：
Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the first phase after distribution The sub-pix X of adjacent pixel output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For the output grey decision-making of the sub-pix X of the second adjacent pixel after distribution.
Wherein, if the grey decision-making allocation unit is specifically used for the pixel or so two adjacent pixels and includes sub- picture Plain X, then by the X of the pixeloutGrey decision-making is distributed to and the sub-pix X in the two neighboring pixel in left and right by predetermined allocation rule Xout, otherwise distribute to the X of the sub-pix X in neighbouring two pixelsout, wherein, left and right is adjacent, and to be defined as sub-pix short Direction is adjacent where the straight line of side, neighbouring to be defined as the adjacent of sub-pix long side straight line place direction.
Wherein, when the grey decision-making W ' of the intermediate variable is less than M, α<1, when input GTG is more than M, α>1.
Wherein, the λ values are：1<λ<(2n- 1)/Max (R '-W ', G '-W ', B '-W '), wherein Max are to take maximum Function, the n are the bit depth for representing color.
Wherein, the value of the β is：1<β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
Embodiment of above is merely to illustrate the present invention, and not limitation of the present invention, about the common of technical field Technical staff, without departing from the spirit and scope of the present invention, it can also make a variety of changes and modification, thus it is all Equivalent technical scheme falls within scope of the invention, and scope of patent protection of the invention should be defined by the claims.

Claims (10)

  1. A kind of 1. RGBW signal conversion methods, it is characterised in that including：
    To a pixel on display panel, judge that the sub-pix X, X that lack represent one of R, G, B and W；
    By such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd BinCalculate respective grey decision-making in output signal Rout、Gout、BoutAnd Wout：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;R</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>,</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;G</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>,</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;B</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>=</mo> <mi>M</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>,</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>,</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>W</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <msup> <mi>&amp;beta;&amp;lambda;W</mi> <mo>,</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>R</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> <mo>,</mo> <msub> <mi>G</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> <mo>,</mo> <msub> <mi>B</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>
    Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is minimum value function, and W ' is Intermediate variable；
    By X corresponding to the XoutGrey decision-making is reset, and generates the XoutGrey decision-making is 0 output signal, described aobvious so as to export Show the pixel for including any three color sub-pixs of R, G, B and W on panel, the XoutRepresent Rout、Gout、BoutAnd WoutIts One of；
    Calculate Rout、Gout、BoutAnd WoutAfterwards, the XoutGrey decision-making also includes before resetting：Judging XoutGrey decision-making is not For 0 when, by the X of the pixeloutGrey decision-making is distributed to and the sub- picture in the two neighboring pixel of the pixel by predetermined allocation rule Plain X Xout, judging XoutWhen grey decision-making is not 0, by the X of the pixeloutGrey decision-making is distributed to by predetermined allocation rule and institute State the X of the sub-pix X in the two neighboring pixel of pixelout, wherein, sub-pix is shaped as rectangle, if described pixel or so is adjacent Two pixels include sub-pix X, then by the X of the pixeloutGrey decision-making is distributed to and left and right phase by the predetermined allocation rule The X of sub-pix X in adjacent two pixelsout, otherwise distribute to the X of the sub-pix X in neighbouring two pixelsout, wherein, it is left The right side is adjacent to be defined as the adjacent of sub-pix short side straight line place direction, neighbouring direction where being defined as sub-pix long side straight line It is adjacent.
  2. 2. RGBW signal conversion methods as claimed in claim 1, it is characterised in that the predetermined allocation rule such as formula (2) It is shown：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>1</mn> </mrow> </msub> <mo>=</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>11</mn> </mrow> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>22</mn> </mrow> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>
    Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the after distribution first adjacent picture The sub-pix X of element output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For The sub-pix X of second adjacent pixel output grey decision-making after distribution.
  3. 3. such as RGBW signal conversion methods according to any one of claims 1 to 2, it is characterised in that the intermediate variable When grey decision-making W ' is less than GTG threshold value M, α<1, when input grey decision-making is more than M, α>1.
  4. 4. such as RGBW signal conversion methods according to any one of claims 1 to 2, it is characterised in that the λ values are：1<λ <(2n- 1) to take max function, the n is the bit depth for representing color by/Max (R '-W ', G '-W ', B '-W '), wherein Max.
  5. 5. such as RGBW signal conversion methods according to any one of claims 1 to 2, it is characterised in that the value of the β is：1 <β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
  6. A kind of 6. RGBW signal translating systems, it is characterised in that including：
    Sub-pix judging unit, for a pixel on display panel, judging that the sub-pix X, X that lack represent R, G, B and W One of them；
    Grey decision-making computing unit, for by such as following formula (1) according to respective grey decision-making R in input signalin、GinAnd BinCalculate defeated Go out respective grey decision-making R in signalout、Gout、BoutAnd Wout：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;R</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>,</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;G</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> <mo>,</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>=</mo> <msub> <mi>&amp;alpha;B</mi> <mrow> <mi>i</mi> <mi>n</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>=</mo> <mi>M</mi> <mi>i</mi> <mi>n</mi> <mrow> <mo>(</mo> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>,</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>,</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>W</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <msup> <mi>&amp;beta;&amp;lambda;W</mi> <mo>,</mo> </msup> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>R</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>R</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> <mo>,</mo> <msub> <mi>G</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>G</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> <mo>,</mo> <msub> <mi>B</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> <mo>=</mo> <mi>&amp;lambda;</mi> <mrow> <mo>(</mo> <msup> <mi>B</mi> <mo>,</mo> </msup> <mo>-</mo> <msup> <mi>W</mi> <mo>,</mo> </msup> <mo>)</mo> </mrow> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>)</mo> </mrow> </mrow>
    Wherein, α is the scaling factor, and λ is the luminance raising factor, and β is white light compensating factor, and Min is to take minimum value function, W ' For intermediate variable；
    Output signal generation unit, for by X corresponding to the XoutGrey decision-making is reset, and generation does not include the XoutGrey decision-making Output signal, so as to export the pixel for including any three color sub-pixs of R, G, B and W on the display panel, the Xout Represent Rout、Gout、BoutAnd WoutOne of them；
    Grey decision-making allocation unit, for judging XoutBy the X of the pixel when grey decision-making is not 0outGrey decision-making is by predetermined distribution Rule distributes to the X with the sub-pix X in the two neighboring pixel of the pixelout；
    Sub-pix is shaped as rectangle, if the grey decision-making allocation unit is specifically used for the pixel or so, two adjacent pixels are equal Comprising sub-pix X, then by the X of the pixeloutGrey decision-making is distributed to and the two neighboring pixel in left and right by the predetermined allocation rule In sub-pix X Xout, otherwise distribute to the X of the sub-pix X in neighbouring two pixelsout, wherein, the adjacent definition in left and right Direction is adjacent where sub-pix short side straight line, neighbouring to be defined as the adjacent of sub-pix long side straight line place direction.
  7. 7. RGBW signal translating systems as claimed in claim 6, it is characterised in that the predetermined allocation rule such as formula (2) It is shown：
    <mrow> <mfenced open = "{" close = ""> <mtable> <mtr> <mtd> <mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>1</mn> </mrow> </msub> <mo>=</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>11</mn> </mrow> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> </mrow> </mtd> </mtr> <mtr> <mtd> <mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>2</mn> </mrow> </msub> <mo>=</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> <mn>22</mn> </mrow> </msub> <mo>+</mo> <mrow> <mo>(</mo> <mn>1</mn> <mo>/</mo> <mn>3</mn> <mo>)</mo> </mrow> <msub> <mi>X</mi> <mrow> <mi>o</mi> <mi>u</mi> <mi>t</mi> </mrow> </msub> </mrow> </mtd> </mtr> </mtable> </mfenced> <mo>-</mo> <mo>-</mo> <mo>-</mo> <mrow> <mo>(</mo> <mn>2</mn> <mo>)</mo> </mrow> </mrow>
    Wherein, Xout11For the output grey decision-making of the sub-pix X of the first adjacent pixel before distribution, Xout1For the after distribution first adjacent picture The sub-pix X of element output grey decision-making, Xout22For the output grey decision-making of the sub-pix X of the second adjacent pixel before distribution, Xout2For The sub-pix X of second adjacent pixel output grey decision-making after distribution.
  8. 8. the RGBW signal translating systems as any one of claim 6~7, it is characterised in that the intermediate variable When grey decision-making W ' is less than GTG threshold value M, α<1, when input grey decision-making is more than M, α>1.
  9. 9. the RGBW signal translating systems as any one of claim 6~7, it is characterised in that the λ values are：1<λ <(2n- 1) to take max function, the n is the bit depth for representing color by/Max (R '-W ', G '-W ', B '-W '), wherein Max.
  10. 10. the RGBW signal translating systems as any one of claim 6~7, it is characterised in that the value of the β is： 1<β<(2n- 1)/λ W ', wherein, the n is the bit depth for representing color.
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