CN100423063C - Signal processing circuit and method for self-luminous type display - Google Patents

Signal processing circuit and method for self-luminous type display Download PDF

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CN100423063C
CN100423063C CNB2005100813154A CN200510081315A CN100423063C CN 100423063 C CN100423063 C CN 100423063C CN B2005100813154 A CNB2005100813154 A CN B2005100813154A CN 200510081315 A CN200510081315 A CN 200510081315A CN 100423063 C CN100423063 C CN 100423063C
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CN1713256A (en
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井上益孝
森幸夫
山下敦弘
棚濑晋
村田治彦
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Sanyo Electric Co Ltd
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Sanyo Electric Co Ltd
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Abstract

In a self-luminous type display in which one pixel includes four unit pixels of RGBW, a signal processing circuit includes first, second and third parts. The first part subtracts a minimum value in RGB input signals from each input signal of RGB. The second part calculates an RGBW signal corresponding to the case in which all the RGB input signals are the minimum value, based on an RGB signal value for realizing target white when all the RGB input signals are a maximum value. The third part determines the RGBW signal by adding a signal corresponding to each RGB subtraction result to the RGBW signal calculated by the second part. Each RGB subtraction result is calculated by the first part.

Description

The signal processing circuit of self-luminous display and signal processing method
Technical field
The present invention relates to a kind of signal processing circuit and signal processing method of self-luminous display.
Background technology
Slim, features such as amount is light, low-power consumption that self-luminous displays such as OLED display have, of many uses.But, with regard to purposes such as mobile phone, digital camera, to the requirement height of further low-power consumption.
Under the situation of the self-luminous displays such as OLED display that stick color filter on the self-luminescent material, when light passed through color filter, the part of light was by absorbed, so light utilization ratio variation.The minuent of this light utilization ratio hinders the decline of power consumption.
Summary of the invention
The object of the present invention is to provide a kind of signal processing circuit and signal processing method of self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit and the signal processing method of the self-luminous display of color filter, wherein, realize low-power consumption.
In addition, the object of the present invention is to provide a kind of signal processing circuit and signal processing method of self-luminous display, be as the random color beyond the RGB with X, constitute the signal processing circuit and the signal processing method of the self-luminous display of a pixel by 4 unit picture elements of RGBX, wherein, rgb signal can be transformed to the RGBX signal.
In addition, the object of the present invention is to provide a kind of signal processing circuit and signal processing method of self-luminous display, be as the random color beyond the RGB with X, constitute the signal processing circuit and the signal processing method of the self-luminous display of a pixel by 5 unit picture elements of RGBWX, wherein, rgb signal can be transformed to the RGBWX signal, realize the raising of light utilization ratio.
The signal processing circuit of the 1st self-luminous display of the present invention is a kind ofly to constitute the signal processing circuit of the self-luminous display of a pixel by 4 unit picture elements of RGBW, it is characterized in that, has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal.
The signal processing circuit of the 2nd self-luminous display of the present invention is the signal processing circuit of following self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal.
The signal processing circuit of the 3rd self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal; The RGB-RGBW signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal; With the γ correcting part, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white
And the RGB-RGBW signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal.
The signal processing circuit of the 4th self-luminous display of the present invention; Being 1 pixel is made of 4 unit picture elements of RGBW; The RGB unit picture element is provided with colour filter; The W unit picture element is not arranged the signal processing circuit of the self-luminous display of colour filter; Wherein be set with the white side reference brightness of RGB; When all being identical value with convenient RGB input signal; Only utilize RGB to come realize target white; Simultaneously; Be set with when the RGB input signal all is maximum, be used for the white RGBW signal value of realize target; It is characterized in that
Have: the 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal;
The 6th parts, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd parts is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd parts obtain, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st parts, the 2nd parts and the 3rd parts, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th parts, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th parts are not under 0 the situation, and the RGBW signal that will be calculated by the 6th parts is carried out and the same processing of the 6th parts as the RGBW signal of centre.
The signal processing circuit of the 5th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal; The RGB-RGBW signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal; With the γ correcting part, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part, can only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white
And the RGB-RGBW signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal;
The 4th parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; Minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd parts is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd parts obtain, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st parts, the 2nd parts and the 3rd parts, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th parts, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th parts are not under 0 the situation, and the RGBW signal that will be calculated by the 6th parts is carried out and the same processing of the 6th parts as the RGBW signal of centre.
The signal processing circuit of the 6th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd parts to each RGB, are calculated the RGB input signal are made as initial term, the feedback rates of each RGB are made as unlimited geometric progression (ordered series of numbers) sum of common ratio;
The 3rd parts deduct the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd parts from each input signal of RGB;
The 4th parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th parts for the RGBW signal of being calculated by above-mentioned the 4th parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd parts, are obtained the RGBW signal.
The signal processing circuit of the 7th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal; The RGB-RGBW signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal; With the γ correcting part, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white
And the RGB-RGBW signal transformation part has:
The 1st parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd parts to each RGB, are calculated the RGB input signal are made as initial term, the feedback rates of each RGB are made as the unlimited geometric progression sum of common ratio;
The 3rd parts deduct the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd parts from each input signal of RGB;
The 4th parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th parts for the RGBW signal of being calculated by above-mentioned the 4th parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd parts, are obtained the RGBW signal.
The signal processing method of the 1st self-luminous display of the present invention; Being 1 pixel is made of 4 unit picture elements of RGBW; The RGB unit picture element is provided with colour filter; The W unit picture element is not arranged the signal processing method of the self-luminous display of colour filter; Wherein be set with the white side reference brightness of RGB; When all being identical value with convenient RGB input signal; Only utilize RGB to come realize target white; Simultaneously; Be set with when the RGB input signal all is maximum, be used for the white RGBW signal value of realize target
It is characterized in that, have:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd step for the RGBW signal that has above-mentioned the 2nd step to calculate, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal.
The signal processing method of the 2nd self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that, wherein
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBW signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal; Revise step with γ, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises;
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part with box lunch, only utilize RGB to realize that target is white, simultaneously, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white;
RGB-RGBW signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal.
The signal processing method of the 3rd self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal;
The 6th step, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd step is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd step obtains, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st step, the 2nd step and the 3rd step, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th step, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th step are not under 0 the situation, and the RGBW signal that will be calculated by the 6th step is carried out and the same processing of the 6th step as the RGBW signal of centre.
The signal processing method of the 4th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBW signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBW signal; Revise step with γ, to the RGBW signal that is obtained by RGB-RGBW signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when revising rgb signal that step obtains by contrary γ and all be maximal value, be used to the RGBW signal value of realizing that target is white
And RGB-RGBW signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal;
The 6th step, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd step is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd step obtains, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st step, the 2nd step and the 3rd step, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th step, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th step are not under 0 the situation, and the RGBW signal that will be calculated by the 6th step is carried out and the same processing of the 6th step as the RGBW signal of centre.
The signal processing method of the 5th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd step to each RGB, is calculated the RGB input signal is made as initial term, the feedback rates of each RGB is made as the unlimited geometric progression sum of common ratio;
The 3rd step deducts the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd step from each input signal of RGB;
The 4th step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th step for the RGBW signal of being calculated by above-mentioned the 4th step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd step, is obtained the RGBW signal.
The signal processing method of the 6th self-luminous display of the present invention, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBW signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBW signal; Revise step with γ, to the RGBW signal that is obtained by RGB-RGBW signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when revising rgb signal that step obtains by contrary γ and all be maximal value, be used to the RGBW signal value of realizing that target is white
And RGB-RGBW signal transformation step has:
The 1st step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd step to each RGB, is calculated the RGB input signal is made as initial term, the feedback rates of each RGB is made as the unlimited geometric progression sum of common ratio;
The 3rd step deducts the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd step from each input signal of RGB;
The 4th step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th step for the RGBW signal of being calculated by above-mentioned the 4th step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd step, is obtained the RGBW signal.
The signal processing circuit of the 8th self-luminous display of the present invention, be as the random colour beyond the RGB with X, constitute the signal processing circuit of the self-luminous display of a pixel by 4 unit picture elements of RGBX, wherein set the signal value of the RGB of the colourity can utilize rgb signal to realize X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBX signal transformation part of RGBX signal,
And the RGB-RGBX signal transformation part has:
The 1st parts, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component (composition) that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd parts deduct the rgb signal component of being calculated by the 1st parts, and export this subtraction result, as rgb signal from the RGB input signal; With
The 3rd parts, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st parts, as the X signal.
The signal processing circuit of the 9th self-luminous display of the present invention, be with X as the random colour beyond the RGB, constitute the signal processing circuit of the self-luminous display of a pixel by 4 unit picture elements of RGBX, it is characterized in that,
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal; The RGB-RGBX signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBX signal; With the γ correcting part, to the RGBW signal that is obtained by the RGB-RGBX signal transformation part, the γ that carries out corresponding to self-luminous display revises, wherein
Rgb signal before will being revised by the γ that contrary γ correcting part obtains is as object, is set with the signal value that is used for being realized by rgb signal the RGB of the colourity of X and high-high brightness,
And the RGB-RGBX signal transformation part has:
The 1st parts, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd parts deduct the rgb signal component of being calculated by the 1st parts, and export this subtraction result, as rgb signal from the RGB input signal; With
The 3rd parts, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st parts, as the X signal.
The signal processing method of the 7th self-luminous display of the present invention, be as the random colour beyond the RGB with X, constitute the signal processing method of the self-luminous display of a pixel by 4 unit picture elements of RGBX, wherein set the signal value of the RGB of the colourity can utilize rgb signal to realize X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBX signal transformation step of RGBX signal,
And RGB-RGBX signal transformation step has:
The 1st step, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd step deducts the rgb signal component of being calculated by the 1st step, and exports this subtraction result, as rgb signal from the RGB input signal; With
The 3rd step, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st step, as the X signal.
The signal processing method of the 8th self-luminous display of the present invention; as protection domain 16 described inventions, be with X as the random colour beyond the RGB, constitute the signal processing method of the self-luminous display of a pixel by 4 unit picture elements of RGBX; it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBX signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBX signal; Revise step with γ, to the RGBW signal that is obtained by RGB-RGBX signal transformation step, the γ that carries out corresponding to self-luminous display revises,
And the rgb signal before will being revised γ that step obtains and be revised by contrary γ is as object, is set with the signal value that is used for being realized by rgb signal the RGB of the colourity of X and high-high brightness,
And RGB-RGBX signal transformation step has:
The 1st step, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd step deducts the rgb signal component of being calculated by the 1st step, and exports this subtraction result, as rgb signal from the RGB input signal; With
The 3rd step, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st step, as the X signal.
The signal processing circuit of the 10th self-luminous display of the present invention, be as the random colour beyond the RGBW with X, 5 unit picture elements by RGBWX constitute a pixel, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with and when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, with utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBWX signal transformation part of RGBWX signal,
And the RGB-RGBWX signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th parts, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd parts, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th parts by deduct the rgb signal component of being calculated by the 1st parts from 1R signal, 1G signal and 1B signal, are calculated 2R signal, 2G signal and 2B signal;
The 6th parts are calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th parts; With
The 7th parts, the W signal that output is obtained by the 3rd parts, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th parts and the X signal that is obtained by the 6th parts are as the RGBWX signal corresponding to above-mentioned RGB input signal.
The signal processing circuit of the 11st self-luminous display of the present invention, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal; The RGB-RGBWX signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBWX signal; With the γ correcting part, to the RGBWX signal that is obtained by the RGB-RGBWX signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part with box lunch, only utilize RGB to realize that target is white, simultaneously, be set with and when the rgb signal that is obtained by contrary γ correcting part all be maximal value, be used to realize the RGBW signal value that target is white and utilize the signal value of realizing the RGB of the colourity of X and high-high brightness by the rgb signal that obtains against the γ correcting part
And the RGB-RGBWX signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th parts, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd parts, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th parts by deduct the rgb signal component of being calculated by the 1st parts from 1R signal, 1G signal and 1B signal, are calculated 2R signal, 2G signal and 2B signal;
The 6th parts are calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th parts; With
The 7th parts, the W signal that output is obtained by the 3rd parts, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th parts and the X signal that is obtained by the 6th parts are as the RGBWX signal corresponding to above-mentioned RGB input signal.
The signal processing method of the 9th self-luminous display of the present invention, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with and when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, with utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBWX signal transformation step of RGBWX signal,
And RGB-RGBWX signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th step, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd step, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th step by deduct the rgb signal component of being calculated by the 1st step from 1R signal, 1G signal and 1B signal, is calculated 2R signal, 2G signal and 2B signal;
The 6th step is calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th step; With
The 7th step, the W signal that output is obtained by the 3rd step, the 2R signal that obtains by the 5th step, by 2G signal and 2B signal and the X signal that obtains by the 6th step, as RGBWX signal corresponding to above-mentioned RGB input signal.
The signal processing method of the 10th self-luminous display of the present invention, be as the random colour beyond the RGBW with X, 5 unit picture elements by RGBWX constitute a pixel, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBWX signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBWX signal; Revise step with γ, to the RGBWX signal that is obtained by RGB-RGBWX signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step with box lunch, only utilize RGB to realize that target is white, simultaneously, be set with the signal value that is used to realize RGBW signal value that target is white when rgb signal that step obtains all be maximal value and realizes the RGB of the colourity of X and high-high brightness according to the rgb signal that obtains by contrary γ correction step when revising by contrary γ
And RGB-RGBWX signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th step, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd step, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th step by deduct the rgb signal component of being calculated by the 1st step from 1R signal, 1G signal and 1B signal, is calculated 2R signal, 2G signal and 2B signal;
The 6th step is calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th step; With
The 7th step, the W signal that output is obtained by the 3rd step, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th step and the X signal that is obtained by the 6th step are as the RGBWX signal corresponding to above-mentioned RGB input signal.
Description of drawings
The mode chart of Fig. 1 example that to be pixel of expression be made of 4 units of R, G, B, W.
Fig. 2 is the block diagram of the formation of expression display device.
Fig. 3 is the mode chart of one of expression RGB input signal example.
Fig. 4 is the mode chart of expression min (RGB).
Fig. 5 is the mode chart of expression input signal-min (RGB).
Fig. 6 is the mode chart of the signal ratio of the expression RGBW that is used to show Wt (255).
Fig. 7 is the mode chart of the signal ratio of the expression RGBW that is used to show Wt (100).
Fig. 8 is expression by the mode chart of the RGBW value that the RGBW value addition of the rgb value of Fig. 5 and Fig. 7 is obtained.
Fig. 9 is the process flow diagram that the expression panel is adjusted treatment step.
Figure 10 is the chromaticity coordinate (X of expression RGBW R, Y R), (X G, Y G), (X B, Y B), (X W, Y W) with the chromaticity coordinate (X of the white Wt of target Wt, Y Wt) mode chart.
Figure 11 is the process flow diagram that expression is used for the RGB input signal is transformed to the signal transformation treatment step of RGBW signal.
Figure 12 is the process flow diagram that expression is used for the RGB input signal is transformed to other example that the signal transformation of RGBW signal handles.
Figure 13 is the mode chart of one of expression RGB input signal example.
Figure 14 is the mode chart of expression RGB input signal-min (RGB).
Figure 15 is the mode chart of expression min (RGB).
Figure 16 is the mode chart of expression corresponding to the RGBW signal of min (RGB).
Figure 17 is expression by the mode chart of the RGBW value that the RGBW value addition of the rgb value of Figure 14 and Figure 16 is obtained.
Figure 18 is that expression is made as R with the RGBW signal that obtains 1G 1B 1W 1Under the situation of input signal, R 1G 1B 1W 1The mode chart of input signal.
Figure 19 is expression R 1G 1B 1Input signal-min (R 1G 1B 1) mode chart.
Figure 20 is expression min (R 1G 1B 1) mode chart.
Figure 21 is that expression is corresponding to min (R 1G 1B 1) the mode chart of RGBW signal.
Figure 22 is that expression is by the R with Figure 19 1G 1B 1The R of value and Figure 21 1G 1B 1W 1The mode chart of the RGBW value that the value addition is obtained.
Figure 23 is the process flow diagram of an example again that expression is used for the RGB input signal is transformed to the signal transformation processing of RGBW signal.
Figure 24 is the block diagram of the formation of expression display device.
The mode chart of Figure 25 example that to be pixel of expression be made of 4 units of R, G, B, Ye.
Figure 26 is the block diagram of the formation of expression display device.
Figure 27 is the process flow diagram that treatment step is adjusted in the reference of expression RGB.
Figure 28 is the mode chart of the chromaticity coordinate of the expression chromaticity coordinate of RGB and the white Wt of target.
Figure 29 is the process flow diagram that treatment step is adjusted in the reference of expression Ye.
Figure 30 is the mode chart of the chromaticity coordinate of the chromaticity coordinate of chromaticity coordinate, the white Wt of target of expression RGB and Ye.
Figure 31 is the process flow diagram of the RGB-RGBYe signal transformation treatment step of expression RGB-RGBYe signal conversion circuit 22.
Figure 32 is the mode chart of expression RGB input signal one example.
Figure 33 is that expression RGB input signal is, is transformed to the rgb signal component α (R of Ye signal under the situation of signal shown in Figure 32 Y α, G Y α, B Y α) mode chart.
Figure 34 is that expression RGB input signal is under the situation of signal shown in Figure 32, the RGB-RGBYe signal that obtains by RGB-RGBYe signal conversion circuit 22 mode chart.
Figure 35 is the block diagram of the formation of expression display device.
The mode chart of Figure 36 example that to be pixel of expression be made of 5 units such as R, G, B, W, Ye.
Figure 37 is the process flow diagram of the white side of expression RGBW with reference to the adjustment treatment step.
Figure 38 is the mode chart of the chromaticity coordinate of the expression chromaticity coordinate of RGB and the white Wt of target.
Figure 39 is the process flow diagram that treatment step is adjusted in the reference of expression Ye.
Figure 40 is the mode chart of the chromaticity coordinate of the chromaticity coordinate of chromaticity coordinate, the white Wt of target of expression RGB and Ye.
Figure 41 is the functional block diagram of the formation of expression RGB-RGBWYe translation circuit.
Figure 42 is the mode chart of expression RGB input signal one example.
Figure 43 is the mode chart of expression min (RGB).
Figure 44 is the mode chart of expression input signal-min (RGB).
Figure 45 is the mode chart of the signal value of the expression RGBW that is used to show Wt (255).
Figure 46 is the mode chart of the signal value of the expression RGBW that is used to show Wt (100).
Figure 47 is expression by the mode chart of the RGBW value that the RGBW value addition of the rgb value of Figure 43 and Figure 46 is obtained.
Figure 48 is the process flow diagram that expression is used for the RGB input signal is transformed to the signal transformation treatment step of RGBW signal.
Figure 49 is the process flow diagram of the RGB-RGBYe signal transformation treatment step of expression RGB-RGBYe signal transformation part 132.
Figure 50 is that expression RGB input signal is, is transformed to the rgb signal component α (R of Yc signal under the situation of signal shown in Figure 47 Y α, G Y α, B Y α) mode chart.
Figure 51 is that expression RGB input signal is, the mode chart of the RGBYe signal that obtained by RGB-RGBYe signal transformation part 132 under the situation of signal shown in Figure 47.
The mode chart of the RGBWYe signal that Figure 52 is under representing to be the situation of signal shown in Figure 42 to the RGB input signal of RGB-RGBWYe translation circuit 122, obtained by RGB-RGBWYe translation circuit 122.
Embodiment
Below, with reference to accompanying drawing embodiments of the invention are described.
(i) to the explanation of the 1st embodiment
(A) about the explanation of the invention of RGB-RGBW signal transformation
The present invention is an object with the self-luminous displays such as OLED display of putting up color filter in self-luminescent material.Like this, with regard to self-luminous display, as shown in Figure 1, constitute a pixel, wherein 3 unit picture elements are disposed the color filter that is used to show 3 primary colors, for example R (red), G (green), B (indigo plant) by 4 unit picture elements.Show a remaining unit picture element special-purpose as white (W) that do not dispose color filter.
In this RGBW arranges, because there is not color filter in the white unit picture element of special use that shows, so the utilization ratio of light is very high.Therefore, for example showing at white 100% o'clock, is not to make RGB show that the unit picture element of usefulness is luminous to show whitely 100%, whitely shows that special-purpose unit picture element is luminous and shows whitely 100% as long as make, and then can realize significantly low-power consumption.
But in fact, the white colourity that is obtained by the white hair luminescent material is not the white colourity of target as a rule, needs dialogue to show that the additional RGB of white hair light of special-purpose unit picture element shows unit picture element luminous of usefulness.
Therefore, in the present invention, be proposed under the different situation of the white colourity of the white colourity that obtains by the white hair luminescent material and target, the RGB input signal be transformed to the gimmick of the signal Processing that the RGBW signal uses.
(1) explanation of the formation of display device
Fig. 2 represents the formation of display device.
RGB input signal to RGB-RGBW signal conversion circuit 1 input digit.RGB-RGBW signal conversion circuit 1 is transformed to the RGBW signal with the RGB input signal.The RGBW signal that is obtained by RGB-RGBW signal transformation part 1 is transformed to the RGBW signal of simulation by D/A translation circuit 2.To send to the OLED display 3 that constitutes a pixel by 4 unit picture elements of RGBW by the RGBW signal that D/A translation circuit 2 obtains.
(2) explanation of the basic consideration method of RGB-RGBW signal transformation
Suppose RGB input signal as shown in Figure 3.In addition, for convenience of description, establish in advance and the RGB input signal is not carried out the γ correction.In addition, establish and will be only realize that by RGB the RGB brightness settings of brightness that target is white and colourity is the white side reference brightness of RGB (with respect to the white side reference voltage of the RGB of D/A translation circuit 2) in advance.In addition, adjust the white side reference brightness of W,, become object brightness (by the brightness of the definite W of the step S4 of Fig. 9 described later) with when only W shows.
In this example, establish the RGB input signal values, be R=200, G=100, B=170 by 8 bit representations.Because the minimum value of RGB input signal values is 100, so the RGB input signal values is resolved into its minimum value shown in Figure 4 (min (RGB)) and surplus value (input signal-min (RGB)) shown in Figure 5.Under the situation of Fig. 4, with the RGB input signal values all be the white Wt of target (100) equivalence under 100 the situation.
To be used to show the RGB input signal values all be that the RGBW signal value of the white Wt of target (255) under 255 the situation is a signal value (77,0,204,255) shown in Figure 6 if establish, then be used to realize the RGB input signal values all be the white Wt of target (100) under 100 the situation the RGBW signal value as shown in Figure 7.
With regard to signal value shown in Figure 6, can be according to being used to realize that RGB brightness value and RGBW brightness value that target is white obtain.To be used to realize that the RGB input signal values all is that the white RGBW signal value of target under 255 the situation is made as (R1, G1, B1, W1).If establish be used to realize brightness that target is white and colourity the RGB brightness value for (LR1, LG1, LB1), be used to realize that the brightness that target is white and the RGBW brightness value of colourity are (LR2, LG2, LB2, LW2), be used to then to realize that the RGB input signal values all is that the white RGBW signal value of target under 255 the situation becomes (R1=255 * LR2/LR1, G1=255 * LG2/LG1, B1=255 * LB2/LB1, W1=255).Especially with regard to W owing to only show that by RGBW system defines, so unique be 255 constant.In addition, aftermentioned is described and to be used to the brightness and the RGB brightness value of colourity and the method for obtaining of RGBW brightness value that realize that target is white.
The R of Fig. 7, G, B, W are obtained by following formula (1).
R＝77×100/255＝30
G＝0×100/255＝0
B＝204×100/255＝80
W＝255×100/255＝100 …(1)
Thus, the rgb value of Fig. 4 is replaced into the RGBW value of Fig. 7.Therefore, the RGBW value addition by with rgb value and Fig. 7 of Fig. 5 is transformed to RGBW value shown in Figure 8 with rgb value shown in Figure 3.
The R of Fig. 8, G, B, W are obtained by following formula (2).
R＝100+30＝130
G＝0+0＝0
B＝70+80＝150
W＝0+100＝100 …(2)
In advance handle the white side reference brightness of obtaining RGB (being used to realize the brightness that target is white and the RGB brightness value of colourity), be used to show the RGBW brightness value of white brightness of target and colourity and be used to realize that the RGB input signal values all is the white RGBW signal value of target under 255 situations by the panel adjustment.
(3) explanation that RGB-RGBW signal transformation is handled.
Fig. 9 represents panel adjustment treatment step.
The brightness L of the white Wt of target setting WtAnd chromaticity coordinate (x Wt, y Wt) (step S1).
Then, measure the colourity (step S2) of the RGBW of OLED display 3.For example, under the situation of the colourity of measuring R, only make the R of OLED display 3 show that the unit picture element of usefulness is luminous, utilize the optical detecting device to measure its colourity.The chromaticity coordinate of the RGBW that is measured to is made as (x respectively R, y R), (x G, y G), (x B, y B), (x W, y W).
RGB brightness value (step S3) when afterwards, calculating white balance (WB) and adjust based on RGB.That is, calculate the brightness L that shows the white Wt of target by 3 color tables of RGB WtAnd colourity (x Wt, y Wt) time the RGB brightness value L R(being equivalent to above-mentioned LR1), L G(being equivalent to above-mentioned LG1), L B(being equivalent to above-mentioned LB1).This brightness value L R, L G, L BObtain by following formula (3).
x R y R x G y G x B y B I . 0 I . 0 I . 0 z R y R z G y G z B y B L R L G L B = x wt y wt L wt L wt z wt y wt L wt . . . ( 3 )
Wherein, ZR=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z Wt=1-X Wt-Y Wt
Brightness value (the step 4) of RGBW when then, calculating white balance (WB) and adjust based on RGB.That is, calculate the brightness L that shows the white Wt of target by the RGBW4 color table WtAnd colourity (x Wt, y Wt) time the RGBW brightness value L R(being equivalent to above-mentioned LR2), L G(being equivalent to above-mentioned LG2), L B(being equivalent to above-mentioned LB2), L W(being equivalent to above-mentioned LW2).
If establish the chromaticity coordinate (x of RGBW R, y R), (x G, y G), (x B, y B), (x W, y W) with the chromaticity coordinate (x of the white Wt of target Wt, y Wt) relation shown in Figure 10 is arranged, then can only show the colourity of the white Wt of target by 3 looks of RGB.By 3 looks of RBW, obtain the brightness L of the white Wt of performance target by following formula (4) WtAnd colourity (x Wt, y Wt) time the RBW brightness value L R(being equivalent to above-mentioned LR2), L B(being equivalent to above-mentioned LB2), L WBe equivalent to above-mentioned LW2).At this moment, the L that is equivalent to above-mentioned LG2 GBecome 0.
x R y R x w y w x B y B I . 0 I . 0 I . 0 z R y R z w y w z B y B L R L w L B = x wt y wt L wt L wt z wt y wt L wt . . . ( 4 )
Wherein, ZR=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z Wt=1-X Wt-Y Wt
Afterwards, use the result that calculates of above-mentioned steps S3, calculate the white side reference brightness (step S5) of RGB.
Under situation by 8 (bit) expression RGB input signal values, adjust the white side reference brightness of RGB, when importing (255,255,255) as rgb signal with box lunch, luminosity and illuminant colour become the brightness L of the white Wt of target WtAnd colourity (x Wt, y Wt).That is, adjust the white side reference brightness of RGB, when importing (255,255,255) as rgb signal with box lunch, the brightness of RGB becomes the brightness value L that above-mentioned steps S3 calculates respectively R, L G, L BLike this, if adjust the white side reference brightness of RGB, be under the situation of identical value then at input RGB, illuminant colour must become the white colourity of target.In addition, adjust the white side reference brightness of W, when only W shows, to become the object brightness (brightness value L of the W that the step S4 of Fig. 9 determines W).
In addition, the brightness value L calculated of the step S3 that handles according to the panel adjustment R(being equivalent to above-mentioned LR1), L G(being equivalent to above-mentioned LG1), L BThe brightness value L that (being equivalent to above-mentioned LB1) and above-mentioned steps S4 calculate R(being equivalent to above-mentioned LR2), L G(being equivalent to above-mentioned LG2), L B(being equivalent to above-mentioned LB2), L WBe equivalent to above-mentioned LW2), calculate in advance and be used to realize that the RGB input signal values all is the RGBW signal value of 255 o'clock the white Wt of target (255).
Figure 11 represents the RGB input signal is transformed to the step that signal transformation that the RGBW signal uses is handled.
At first, determine minimum value (min (RGB)) (step S11) in the RGB input signal.In the example of Fig. 3, min (RGB)=100.
Afterwards, from each RGB input signal, deduct min (RGB) (step S12).In the example of Fig. 3, as shown in Figure 5, the subtraction result of RGB is respectively 100,0,70.
Then, be used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white Wt of target (255), min (RGB) is transformed to RGBW signal (step S13).If be used to realize that the RGBW signal value of the white Wt of target (255) is a signal value shown in Figure 6, then in the example of Fig. 3, as shown in Figure 7 corresponding to the signal value of the RGBW signal of min (RGB).
Afterwards, by the signal value of the RGBW signal that will obtain by above-mentioned steps S13 and subtraction value { RGB-min (the RGB) } addition that above-mentioned steps S12 calculates, calculate RGBW signal (step S14) corresponding to the RGB input signal.In the example of Fig. 3, as shown in Figure 8 corresponding to the RGBW signal of RGB input signal.
(4) explanation of the 1st variation of RGB-RGBW signal transformation processing
Just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of G signal, the processing (RGB-RGBW conversion program) of step S11～step S14 by Figure 11, a signal (G signal) that obtains rgb signal becomes 0 RGBW signal.
Equally, just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of B signal, also can pass through the processing (RGB-RGBW conversion program) of the step S11-step S14 of Figure 11, a signal (B signal) that obtains rgb signal becomes 0 RGBW signal.In addition, just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of R signal, also can pass through the processing (RGB-RGBW conversion program) of the step S11-step S14 of Figure 11, a signal (R signal) that obtains rgb signal becomes 0 RGBW signal.
But, just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of signal of the look beyond the G signal, just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of signal of the look beyond the B signal, just can be only show with regard to the situation of the white colourity of target by 3 looks of RGB, minimum value in the RGB input signal is under the situation of signal of the look beyond the R signal, only pass through the processing (RGB-RGBW conversion program) of the step S11-step S14 of 1 Figure 11 of execution, a signal in the rgb signal in the RGBW signal that obtains is not 0.
That is, under different condition, only by carrying out 1 RGB-RGBW conversion program, a signal in the rgb signal in the RGBW signal that obtains is not 0.
The RGB input signal is transformed to the RGBW signal, so that a signal in the rgb signal in the RGBW signal becomes at 0 o'clock, it is big that the size of W signal becomes, and luminescence efficiency uprises, and realizes low-power consumption.
Therefore, in the 1st variation, propose condition, all obtain the signal transformation method that a signal in the rgb signal is 0 RGBW signal.
Figure 12 represents the RGB input signal is transformed to the step that signal transformation that the RGBW signal uses is handled.
If being used to show the RGB input signal values and all being the RGBW signal value of 255 o'clock the white Wt of target (255) is signal value shown in Figure 8.
At first, determine minimum value (min (RGB)) (step S21) in the RGB input signal.As shown in figure 13, if establishing the RGB input signal values is R=200, G=170, B=100, then as shown in figure 15, be min (RGB)=100.
Afterwards, from each RGB input signal, deduct min (RGB) (step S22).In the example of Figure 13, as shown in figure 14, the subtraction result of RGB is respectively 100,70,0.That is, the RGB input signal is resolved into the signal value of the RGB of the signal value of RGB of Figure 14 and Figure 15.
Then, be used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white Wt of target (255), min (RGB) is transformed to RGBW signal (step S23).If be used to realize that the RGBW signal value of the white Wt of target (255) is a signal value shown in Figure 6, then in the example of Figure 13, corresponding to the signal value of the RGBW signal of min (RGB) shown in Figure 16 (the same) with Fig. 7.
Afterwards, by the signal value of RGBW signal that above-mentioned steps S23 is obtained and subtraction value { RGB-min (the RGB) } addition that above-mentioned steps S22 obtains, calculate RGBW signal (step S24) corresponding to the RGB input signal.In the example of Figure 13, as shown in figure 17 corresponding to the RGBW signal of RGB input signal.
The R of Figure 17, G, B, W are obtained by following formula (5).
R＝100+30＝130
G＝70+0＝70
B＝0+80＝80
W＝0+100＝100 …(5)
Afterwards, whether the minimum value of judging the rgb signal in the RGBW signal obtain is 0 (step S25).The minimum value of the rgb signal in the RGBW signal that obtains is under 0 the situation, the termination signal conversion process.That is, the RGBW signal that obtains of above-mentioned steps S24 constitutes the RGBW output signal.
The minimum value of the rgb signal in the RGBW signal that obtains is not under 0 the situation, regards the RGBW signal that obtains as input RGBW signal, carries out the same processing of carrying out with above-mentioned steps S21～S24 of processing (RGB-RGBW conversion program) once more.
That is, the minimum value of the rgb signal in the RGBW signal is not under 0 the situation, as shown in figure 18, the RGBW signal that obtains to be made as R 1G 1B 1W 1Input signal.In addition, determine R 1G 1B 1Minimum value in the input signal (min (R 1G 1B 1)) (step S26).As shown in figure 18, if establish R 1G 1B 1W 1Input signal is R=130, G=70, B=80, W=100, then as shown in figure 20, is min (R 1G 1B 1)=70.
Then, from each R 1G 1B 1Deduct min (R in the input signal 1G 1B 1) (step S27).In the example of Figure 18, as shown in figure 10, the subtraction result of RGB is become 60,0,10 respectively.That is, with R 1G 1B 1Input signal is decomposed into the R of Figure 10 1G 1B 1The R of signal value and Figure 20 1G 1B 1Signal value.
Afterwards, be used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white Wt of target (255), with min (R 1G 1B 1) be transformed to RGBW signal (step S28).If be used to realize that the RGBW signal value of the white Wt of target (255) is a signal value shown in Figure 6, then in the example of Figure 20, corresponding to min (R 1G 1B 1) the RGBW signal signal value as shown in figure 21.
The R of Figure 21, G, B, W are obtained by following formula (6).
R＝77×70/255＝21
G＝0×70/255＝0
B＝204×70/255＝56
W＝255×70/255＝70 …(6)
Afterwards, with the subtraction value { RGB-min (R that calculates among the signal value of the RGB in the RGBW signal of obtaining among the above-mentioned steps S28 and the above-mentioned steps S27 1G 1B 1) addition, obtain rgb signal, simultaneously, with W signal value and the R in the RGBW signal of obtaining among the above-mentioned steps S28 1G 1B 1W 1W in the input signal 1W signal (step S29) is obtained in addition.Like this, obtain the RGBW signal.
In above-mentioned example, the RGBW signal as shown in figure 22.The R of Figure 22, G, B, W are obtained by following formula (7).
R＝60+21＝81
G＝0+0＝0
B＝10+56＝66
W＝100+70＝170 …(7)
Afterwards, whether the minimum value of judging the rgb signal in the RGBW signal of being obtained by above-mentioned steps S29 is 0 (step S30).The minimum value of the rgb signal in the RGBW signal that obtains is under 0 the situation, the termination signal conversion process.
The minimum value of the rgb signal in the RGBW signal that obtains is not under 0 the situation, to return above-mentioned steps S26.That is, repeat the RGB-RGBW conversion program, till the minimum value of the rgb signal in the RGBW signal that obtains is 0.
(5) explanation of the 2nd variation of RGB-RGBW signal transformation processing
As described in above-mentioned the 1st variation, because of the condition difference, become 0 signal by deducting min (RGB), by after be transformed to the RGBW signal from min (RGB), keep the value more than 1.In this case, as described in above-mentioned the 1st variation, repeat the RGB-RGBW conversion program.
In the 2nd variation, propose by carrying out 1 RGB-RGBW conversion program, regardless of condition, all obtain the signal transformation method that in the rgb signal at least one becomes 0 RGBW signal.
Be conceived to a signal in the rgb signal, the process of signal transformation is described.If the signal that hypothesis will be had in mind is treated to min (RGB) all the time, in addition, by the conversion of min (RGB) to RGBW, about 0.8 one-tenth of W signal after this conversion of this signal feedback, the signal of then having in mind is being 50 o'clock with the initial value height for example, shown in (8), corresponding to the execution number of times variation of RGB-RGBW conversion program.
50→40→32→25.6→20.5→16.4→13.1…→0 …(8)
At this moment, the W signal is with the value after whole numerical value additions of above-mentioned formula (8), and the unlimited geometric progression sum that can be used as initial term 50, common ratio 0.8 is obtained.Under the situation of-1＜common ratio＜1, unlimited geometric progression sum can be as shown in the formula omitting shown in (9).
Unlimited geometric progression sum=initial term/(1-common ratio) ... (9)
Therefore, under the situation of unlimited geometric progression by formula (8) expression, unlimited geometric progression sum becomes 50/ (1-0.8)=250.
In the system of reality, each rgb signal is calculated above-mentioned unlimited geometric progression sum, with wherein minimum and be made as min (RGB), carry out 1 time the RGB-RGBW conversion program.As a result, one in the rgb signal in the RGBW signal that obtains becomes 0, and other two values become the value more than 0.
With the RGB input signal values is that the situation of R=255, G=255, B=50 is that example describes.
Supposing to be used to show the RGB input signal values and all be the signal value situation as shown in Figure 6 of RGBW signal of 255 o'clock the white Wt of target (255), is 0.3 (W=77/255 of R/ Fig. 6 of=Fig. 6), 0 (W of G/ Fig. 6 of=Fig. 6), 0.8 (W=204/255 of B/ Fig. 6 of=Fig. 6) based on min (RGB) to the feedback rates of the rgb signal of RGBW signal transformation.
If the unlimited geometric progression sum of establishing corresponding to R, G, B is ∑ R, ∑ G, ∑ B, then ∑ R, ∑ G, ∑ B are as shown in the formula shown in (10).
∑R＝255/(1-0.3)＝364
∑G＝255/(1-0)＝255
∑B＝50/(1-0.8)＝250 …(10)
Because minimum value is 250, so if deduct 250 from RGB, then its subtraction result is as shown in the formula shown in (11).
R＝255-250＝5
G＝255-250＝5
B＝50-255＝-200 …(11)
On the other hand, if min (RGB) (=250) is transformed to the RGBW signal, then as shown in the formula shown in (12).
R＝255×0.3＝75
G＝255×0＝0
B＝50×0.8＝20
W＝250 …(12)
Therefore, the RGBW output signal is as shown in the formula shown in (13).
R＝5+75＝80
G＝5×0＝5
B＝-200+200＝0
W＝250 …(13)
Figure 23 represents to be used for the RGB input signal is transformed to the step of the signal transformation processing of RGBW signal.
Use is used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white Wt of target (255), calculates the feedback rates (step S41) of rgb signal.Be used to realize that the RGBW signal value of the white Wt of target (255) is a signal value shown in Figure 6 if establish, then the feedback rates of rgb signal becomes 0.3 (=77/255), 0,0.8 (=204/255).
Afterwards, to each RGB input signal, calculate with the RGB input signal values be made as initial term, the feedback rates that will calculate with above-mentioned steps S41 is unlimited geometric progression sum ∑ R, ∑ G, the ∑ B (step S42) of common ratio.
Afterwards, the unlimited geometric progression sum ∑ R that will calculate each RGB input signal, the minimum value among ∑ G, the ∑ B deduct from the RGB input signal (step S43) as min (RGB).
Then, be used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white Wt of target (255), min (RGB) is transformed to RGBW signal (step S44).
Then, by the signal value of the RGBW signal that will obtain with above-mentioned steps S44 and subtraction value { RGB-min (the RGB) } addition that above-mentioned steps S43 obtains, calculate RGBW signal (step S45) corresponding to the RGB input signal.
But, in advance the RGB input signal is applied γ sometimes and revises.In this case, in order to simplify signal Processing, the rgb signal before preferably input γ revises in the RGB-RGBW of Fig. 2 translation circuit 1.Therefore, preferably as shown in figure 24, at the leading portion of RGB-RGBW translation circuit 1, the contrary γ correction circuit 11 of configuration is carried out contrary γ by the RGB input signal that prior enforcement γ is revised and is revised, the RGB input signal is transformed to γ revises preceding rgb signal, simultaneously, at the back segment of RGB-RGBW translation circuit 1, configuration gamma correction circuit 12, to RGBW signal, carry out γ correction corresponding to the panel characteristics of OLED display 3 from 1 output of RGB-RGBW translation circuit.At this moment, but the various calculating former states in the RGB-RGBW translation circuit 1 are used for the computing method that above-mentioned the 1st variation, above-mentioned the 2nd variation exemplify.That is, use rgb signal from contrary γ correction circuit 11 outputs as " RGB input signal " the foregoing description, above-mentioned the 1st variation, above-mentioned the 2nd variation.
(ii) to the explanation of the 2nd embodiment
(B) relate to the explanation of the invention of RGB-RGBX (X is a random colour) signal
In above-mentioned (A), described and be used for rgb signal is transformed to the RGBW Signal Processing.Here, describe X as the random colour (random colours that chromaticity coordinate is different with RGB) beyond the RGB, rgb signal is transformed to the RGBW Signal Processing.
Embodiment when being illustrated as X-Ye here.With regard to self-luminous display, as shown in figure 25, constitute a pixel by 4 unit picture elements, wherein 3 unit picture elements are disposed the color filter that is used to show 3 primary colors, for example R (red), G (green), B (indigo plant).A remaining unit picture element is disposed the color filter that is used to show Ye (Huang).
(1) explanation of the formation of display device
Figure 26 represents the formation of display device.
If the RGB input signal of numeral is implemented γ in advance to be revised.Implement the digital rgb input signal that γ revises in advance to contrary γ correction circuit 21 inputs.Contrary γ correction circuit 21 passes through that the RGB input signal is carried out contrary γ to be revised, and the RGB input signal is transformed to γ revises preceding rgb signal.
To send to RGB-RGBYe signal conversion circuit 22 by the rgb signal that contrary γ correction circuit 21 obtains.RGB-RGBYe signal conversion circuit 22 is transformed to the RGBYe signal with the RGB input signal.To send to γ correction circuit 23 by the RGBYe signal that RGB-RGBYe signal conversion circuit 22 obtains.
The γ that the RGBYe signal of 23 pairs of inputs of γ correction circuit is carried out corresponding to the panel characteristics of OLED display 25 revises.The RGBYe signal transformation that D/A translation circuit 24 will be obtained by γ correction circuit 23 is the RGBYe signal of simulation.To send to the OLED display 25 that a pixel is made of 4 unit picture elements of RGBYe by the RGBYe signal that D/A translation circuit 24 obtains.
RGB-RGBYe signal conversion circuit 22 is transformed to the RGBYe signal according to the signal value of the RGB of colourity that is used to realize Ye (yellow of being determined by the color filter of correspondence) and high-high brightness with rgb signal.Therefore, at first explanation is used to realize the calculation method of signal value of the RGB of the colourity of Ye and high-high brightness.
(2) to the explanation of the calculation method of the signal value of the RGB of the colourity that is used to realize Ye and high-high brightness
Figure 27 represents the reference adjustment treatment step of RGB.
The brightness L of the white Wt of target setting WtAnd chromaticity coordinate (x Wt, y Wt) (step S51).
Then, measure the colourity (step S52) of the RGB of OLED display 25.For example, under the situation of the colourity of measuring R, only make the R of OLED display 25 show that the unit picture element of usefulness is luminous, utilize the optical detecting device to measure its colourity.The chromaticity coordinate of the RGB that is measured to is made as (x respectively R, y R), (x G, y G), (x B, y B), (x W, y W).The chromaticity coordinate of the chromaticity coordinate of RGB shown in Figure 28 and the white Wt of target.
RGB brightness value (step S53) when afterwards, calculating white balance (WB) and adjust based on RGB.That is, calculate the brightness L that shows the white Wt of target by 3 color tables of RGB WtAnd colourity (x Wt, y Wt) time the RGB brightness value L WR, L WG, L WBThis brightness value L WR, L WG, L WBObtain by following formula (14).
x R y R x G y G x B y B I . 0 I . 0 I . 0 z R y R z G y G z B y B Lw R Lw G Lw B = x wt y wt L wt L wt z wt y wt L wt . . . ( 14 )
Wherein, ZR=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z Wt=1-X Wt-Y Wt
Then, use the result that calculates of above-mentioned steps S53, calculate the white side reference brightness (step S54) of RGB.
Under the situation of RGB input signal values by 8 bit representations, adjust the white side reference brightness of RGB, make when (255,255,255) are imported RGB-RGBYe signal conversion circuit 22 as rgb signal, luminosity and illuminant colour become the brightness L of the white Wt of target WtAnd colourity (x Wt, y Wt).That is, adjust the white side reference brightness of RGB, make with (255,255,255) when being input to RGB-RGBYe signal conversion circuit 22 as rgb signal, the brightness of RGB becomes the L that above-mentioned steps S53 calculates respectively WR, L WG, L WB
Figure 29 represents the reference adjustment treatment step of Ye.
Measure the colourity (step S61) of the Ye of OLED display 25.That is, only make the Ye demonstration of OLED display 24 luminous, utilize the optical detecting device to measure its colourity with unit picture element.The chromaticity coordinate of the Ye that is measured to is made as (x Ye, y Ye).The chromaticity coordinate of the chromaticity coordinate of RGB shown in Figure 30, the white Wt of target and the chromaticity coordinate of Ye.
Afterwards, calculate RGB brightness ratio (step S62) when adjusting based on the Ye of RGB.That is, calculate the colourity (x that shows Ye by 3 color tables of RGB Ye, y Ye) time RGB brightness ratio L YeR, L YeG, L YeBThis brightness ratio L YeR, L YeR, L YeBObtain by following formula (15).
x R y R x G y G x B y B I . 0 I . 0 I . 0 z R y R z G y G z B y B Lye R Lye G Lye B = x ye y ye I z ye y ye . . . ( 15 )
Wherein, ZR=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z Ye=1-X Ye-Y Ye
RGB brightness value L when afterwards, the white balance (WB) of the RGB that obtains according to the step S53 based on Figure 27 is adjusted WR, L WG, L WB, and the Ye of the RGB that obtains based on the above-mentioned steps S62 RGB brightness ratio L when adjusting YeR, L YeG, L YeB, the RGB brightness when calculating the performance colourity of Ye and high-high brightness simultaneously, is obtained the signal value (with the signal value of the RGB of Ye (255) equivalence) (step S63) of the RGB of the colourity that is used to realize Ye and high-high brightness.
That is, in the RGB brightness range of when the white WT of performance target, determining, calculate the RGB brightness L that is used to show Ye (255) YeR', L YeG', L YeB'.
Calculate L WR/ L YeR, L WG/ L YeG, L WB/ L YeB, by minimum value wherein be multiply by L YeR, L YeG, L YeB, obtain being used to show the RGB brightness L of Ye (255) YeR', L YeG', L YeB'.
RGB brightness L when for example, establishing white balance (WB) adjustment WR, L WG, L WBBe 30[cd]: 60[cd]: 10[cd], the RGB brightness ratio L when Ye adjusts YeR, L YeG, L YeBBe 0.25: 0.6: 0.05, L then WR/ L YeR=120, L WG/ L YeG=100, L WB/ L YeB=200.Because minimum value is 100, so if to L YeR, L YeG, L YeBMultiply by 100 respectively, then be used to show the RGB brightness L of colourity and the high-high brightness of Ye YeR', L YeG', L YeB' be 25[cd]: 60[cd]: 5[cd].
Be (L if establish the colourity that is used to show Ye and the RGB brightness of high-high brightness YeR', L YeG', L YeB'), the RGB brightness value (L when white balance (WB) is adjusted WR, L WG, L WB), then be used to show the signal value (R of the RGB of the colourity of Ye and high-high brightness Ye, G Ye, B Ye) become R Ye=255 * L YeR'/L WR, G Ye=255 * L YeG'/L WG, B Ye=255 * L YeB'/L WB
In above-mentioned example, be R Ye=255 * 25/30=213, G Ye=255 * 60/60=255, B Ye=255 * 5/10=128.
Below, the RGB brightness value L of using according to the Ye colourity of obtaining among the performance above-mentioned steps S63 and high-high brightness YeR', L YeG', L YeB', the white side of adjusting Ye is with reference to (step S64).The white side reference voltage of Ye (corresponding to the output voltage of the D/A transducer 24 of Ye=255) when only being shown by Ye, is adjusted, and its brightness is become be used to the aggregate value (L of the RGB brightness of the colourity that shows Ye and high-high brightness YeR'+L YeG'+L YeB').
(3) explanation that the RGB-RGBYe signal transformation of RGB-RGBYe signal conversion circuit 22 is handled
Figure 31 represents the RGB-RGBYe signal transformation treatment step of RGB-RGBYe signal conversion circuit 22.
Here, the input signal of near RGB-RGBYe signal conversion circuit 22 is called the RGB input signal.Calculate the rgb signal component, so that under situation about deducting from the RGB input signal as the rgb signal component that is transformed to the Ye signal from the RGB input signal that is transformed to the rgb signal component that the Ye signal obtains, at least one in the RGB subtraction result is 0 (step S71).
If establishing the signal value of the RGB of the colourity that is used to show Ye and high-high brightness is R Ye, G Ye, B Ye, the rgb signal component that then is transformed to the Ye signal is by α (R Ye, G Ye, B Ye) represent.Therefore, at first from the RGB input signal, deducting α (R Ye, G Ye, B Ye) situation under, obtain in the RGB subtraction result at least one and be 0 α.Particularly, if represent the RGB input signal, then calculate R/R with R, G, B Ye, G/G Ye, B/B Ye, and its minimum value is made as α.Afterwards, calculate α (R Ye, G Ye, B Ye).
For example, suppose that the RGB input signal is a situation shown in Figure 32.If establish the RGB maximum signal level (R of the colourity and the high-high brightness that are used to realize Ye Ye, G Ye, B Ye) be R Ye=213, G Ye=255, B Ye=128, then because the RGB input signal is R=200, G=100, B=170 is so there is R/R Ye=200/213=0.95, G/G Ye=100/255=0.39, B/B Ye=170/128=1.33 is so its minimum value is 0.39.Therefore, if be made as α=0.39, α R is arranged then Ye=78, α G Ye=100, α B Ye=67.That is, be transformed to the rgb signal component α (R of Ye signal Ye, G Ye, B Ye) as shown in figure 33.
Afterwards, from the RGB input signal, deduct the rgb signal component α (R that is transformed to the Ye signal Ye, G Ye, B Ye) (step S72).
In above-mentioned example, the subtraction result of R be 122 (=200-78), the subtraction result of G be 0 (=100-100), the subtraction result of B be 103 (=170-67).
Afterwards, will export (step S73) as rgb signal by the RGB subtraction result separately that above-mentioned steps S72 calculates.
In addition, 255 * α is exported (step S74) as the Ye signal.In above-mentioned example, the Ye signal becomes 100 (=0.39 * 255).That is, in above-mentioned example, the RGBYe signal as shown in figure 34.
In addition, in the above-described embodiments, the situation that rgb signal is transformed to the RGBYe signal is described, but this gimmick is also applicable to X being made as random colour beyond the RGB, rgb signal being transformed to the situation of RGBX signal.
(iii) to the explanation of the 3rd embodiment
(1) explanation of the formation of display device
Figure 35 represents the formation of display device.
The device of color filter is puted up in use in self-luminescent material, as OLED display 125.In this OLED display 125, as shown in figure 36, constitute a pixel by 5 unit picture elements, 3 unit picture element configurations wherein are used to show the color filter of 3 primary colors, for example R (red), G (green), B (indigo plant).A unit picture element in remaining two unit picture elements becomes white (W) that do not dispose color filter and shows special-purpose unit picture element.Remaining unit picture element configuration is used to show random colour beyond the RGBW, is the color filter of Ye (yellow) in this example.
In this RGBWX arranges, owing to do not have color filter in the special-purpose unit picture element of white demonstration, so the utilization ratio of light (luminescence efficiency) is very high.Therefore, for example showing at white 100% o'clock, is not to make RGB show that the unit picture element of usefulness is luminous, show white 100%, as long as but make the special-purpose unit picture element of white demonstration luminous, show whitely 100%, then can realize significantly low-power consumption.But in fact, the white colourity that is obtained by self-luminescent material is not the white colourity of target as a rule, needs dialogue to show that the additional RGB of autoluminescence of special-purpose unit picture element shows unit picture element luminous of usefulness.In addition, establish the yellow unit picture element that is only second to white demonstration usefulness with the luminescence efficiency of unit picture element that shows.
If the digital rgb input signal of input and display device is implemented γ in advance to be revised.Implement the digital rgb input signal that γ revises in advance to contrary γ correction circuit 121 inputs.Contrary γ correction circuit 121 passes through that the RGB input signal is carried out contrary γ to be revised, and the RGB input signal is transformed to γ revises preceding rgb signal.
To send to RGB-RGBWYe signal conversion circuit 122 by the rgb signal that contrary γ correction circuit 121 obtains.RGB-RGBWYe signal conversion circuit 122 is transformed to the RGBWYe signal with the RGB input signal.To send to γ correction circuit 123 by the RGBWYe signal that RGB-RGBWYe signal conversion circuit 122 obtains.
The γ that the RGBWYe signal of 123 pairs of inputs of γ correction circuit is carried out corresponding to the panel characteristics of OLED display 125 revises.The RGBWYe signal transformation that will be obtained by γ correction circuit 123 by D/A translation circuit 124 is the RGBWYe signal of simulation.To send to the OLED display 125 that a pixel is made of 4 unit picture elements of RGBWYe by the RGBWYe signal that D/A translation circuit 124 obtains.
(2) to explanation with reference to adjustment
With reference to the white side that RGBW is arranged in adjusting with reference to adjust and the white side of Ye with reference to adjustment.
Figure 37 represents that the white side of RGBW is with reference to adjusting treatment step.
The brightness L of the white Wt of target setting WtAnd chromaticity coordinate (x Wt, y Wt) (step S81).
Then, measure the colourity (step S82) of the RGBW of OLED display 125.For example, under the situation of the colourity of measuring R, only make the R of OLED display 125 show that the unit picture element of usefulness is luminous, utilize the optical detecting device to measure its colourity.The chromaticity coordinate of the RGBW that is measured to is made as (x respectively R, y R), (x G, y G), (x B, y B), (x W, y W).
RGB brightness value (step S83) when afterwards, calculating white balance (WB) and adjust based on RGB.That is, calculate the brightness L that shows the white Wt of target by 3 color tables of RGB WtAnd colourity (x Wt, y Wt) time the RGB brightness value L WR1, L WG1, L WB1This brightness value L WR1, L WG1, L WB1Obtain by following formula (16).
x R y R x G y G x B y B I . 0 I . 0 I . 0 z R y R z G y G z B y B Lw RI Lw GI Lw BI = x wt y wt L wt L wt z wt y wt L wt . . . ( 16 )
Wherein, Z R=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z Wt=1-X Wt-Y Wt
RGBW brightness value (step S84) when then, calculating white balance (WB) and adjust based on RGBW.That is, calculate the brightness L that shows the white Wt of target by the RGBW4 color table WtAnd colourity (x Wt, y Wt) time the RGBW brightness value L WR2, L WG2, L WB2, L W2
If the chromaticity coordinate (x of RGBW R, y R), (x G, y G), (x B, y B), (x W, y W) with the chromaticity coordinate (x of the white Wt of target Wt, y Wt) there is relation shown in Figure 38, then can only show the colourity of the white Wt of target by 3 looks of RBW.The brightness L that shows the white Wt of target by 3 color tables of RGB WtAnd colourity (x Wt, y Wt) time the RGB brightness value L WR2, L WB2, L W2Obtain by following formula (17).At this moment, the brightness value L of G WG2Become 0.
x R y R x w y w x B y B I . 0 I . 0 I . 0 z R y R z w y w z B y B L wR 2 L w 2 L wB 2 = x wt y wt L wt L wt z wt y wt L wt . . . ( 17 )
Wherein, Z R=1-X R-Y R, Z W=1-X W-Y W, Z B=1-X B-Y B, Z Wt=1-X Wt-Y Wt
Afterwards, use the result that calculates of above-mentioned steps S83, adjust the white side reference brightness (step S85) of RGBW.
In the following description, so-called RGB input signal is meant the rgb signal that by the rgb signal that obtains against γ correction circuit 121, promptly is input to RGB-RGBWYe signal conversion circuit 122.Under situation by 8 bit representation RGB input signal values, adjust the white side reference brightness of RGB, so that when will (255,255,255) importing RGB-RGBWYe signal conversion circuit 122 as rgb signal, luminosity and illuminant colour become the brightness L of the white Wt of target WtAnd colourity (x Wt, y Wt).
That is, adjust the white side reference brightness of RGB, so that with (255,255,255) when being input into RGB-RGBWYe signal conversion circuit 122 as rgb signal, the brightness of RGB becomes the brightness value L that above-mentioned steps S83 calculates respectively WR1, L WG1, L WB1Like this, if adjust the white side reference brightness of RGB, be under the situation of identical value then at the RGB input signal, illuminant colour must become the white colourity of target.In addition, adjust the white side reference brightness of W, when only W shows, to become the object brightness (brightness value L of the W that the step S84 of Figure 37 determines W2).
In addition, calculate and be used to realize that the RGB input signal values all is the RGBW signal value (step S86) of 255 o'clock the white Wt of target (255).If being used to realize the RGB input signal values all is that the RGBW signal value of 255 o'clock the white Wt of target (255) is (R W, G W, B W, W W).If being used to of establishing that above-mentioned steps S83 calculates realizes that the brightness that target is white and the RGB brightness value of colourity are L WR1, L WG1, L WB1, being used to of establishing that above-mentioned steps S84 calculates realizes that the brightness that target is white and the RGBW brightness value of colourity are L WR2, L WG2, L WB2, L W2, then calculate and be used to realize that the RGB input signal values all is 255 o'clock the white RGBW signal value of target according to following formula (18).
R W＝255×L WR2/L WR1
G w＝255×L WG2/L WG1＝0
B W＝255×L WB2/L WB1
W W＝255 …(18)
Figure 39 represents the reference adjustment treatment step of Ye.
Measure the colourity (step S91) of the Ye of OLED display 125.That is, only make the Ye demonstration of OLED display 125 luminous, utilize the optical detecting device to measure its colourity with unit picture element.The chromaticity coordinate of the Ye that is measured to is made as (x Ye, y Ye).The chromaticity coordinate of the chromaticity coordinate of RGB shown in Figure 40, the white Wt of target and the chromaticity coordinate of Ye.
Afterwards, calculate RGB brightness ratio (step S92) when adjusting based on the Ye of RGB.That is, calculate the colourity (x that shows Ye by 3 color tables of RGB Ye, y Ye) time RGB brightness ratio L YeR, L YeG, L YeBThis brightness ratio L YeR, L YeG, L YeBObtain by following formula (19).
x R y R x G y G x B y B I . 0 I . 0 I . 0 z R y R z G y G z B y B Lye R Lye G Lye B = x ye y ye I z ye y ye . . . ( 19 )
Wherein, Z R=1-X R-Y R, Z G=1-X G-Y G, Z B=1-X B-Y B, Z YR=1-X YG-Y YB
RGB brightness value L when afterwards, the white balance (WB) of the RGB that obtains according to the step S83 based on Figure 37 is adjusted WR1, L WG1, L WB1, and the Ye of the RGB that obtains based on the above-mentioned steps S92 RGB brightness ratio L when adjusting YeR, L YeG, L YeB, the RGB brightness when calculating the performance colourity of Ye and high-high brightness simultaneously, is obtained the signal value (being used to realize the signal value of the RGB of Ye (255)) (step S93) of the RGB of the colourity that is used to realize Ye and high-high brightness.
That is, in the RGB brightness range of when performance target white (WT), determining, calculate the RGB brightness L that is used to show Ye (255) YeR', L YeG', L YeB'.
Calculate L WR1/ L YeR, L WG1/ L YeG, L WB1/ L YeB, by minimum value wherein be multiply by L YeR, L YeG, L YeB, obtain being used to show the RGB brightness L of Ye (255) YeR', L YeG', L YeB'.
RGB brightness L when for example, establishing white balance (WB) adjustment WR1, L WG1, L WB1Be 30[cd]: 60[cd]: 10[cd], the RGB brightness ratio L when Ye adjusts YeR, L YeG, L YeBBe 0.25: 0.6: 0.05, L then WR1/ L YeR=120, L WG1/ L YeG=100, L WB1/ L YeB=200.Because minimum value is 100, so if to L YeR, L YeG, L YeBMultiply by 100 respectively, then be used to show the RGB brightness L of colourity and the high-high brightness of Ye YeR', L YeG', L YeB' be 25[cd]: 60[cd]: 5[cd].
Be (L if establish the RGB brightness that is used to show Ye (255) YeR', L YeG', L YeB'), the RGB brightness value when white balance (WB) is adjusted is (L WR1, L WG1, L WB1), then be used to realize the signal value (R of the RGB of Ye (255) Ye, G Ye, B Ye) become R Ye=255 * L YeR'/L WR1, G Ye=255 * L YeG'/L WG1, B Ye=255 * L YeB'/L WB1
In above-mentioned example, be R Ye=255 * 25/30=213, G Ye=255 * 60/60=255, B Ye=255 * 5/10=128.
Below, according to the RGB brightness value L of Ye (255) usefulness of obtaining among the performance above-mentioned steps S93 YeR', L YeG', L YeB', the white side of adjusting Ye is with reference to (step S94).The white side reference voltage of Ye (corresponding to the output voltage of the D/A transducer 124 of Ye=255) when only being shown by Ye, is adjusted, and its brightness is become be used to the aggregate value (L of the RGB brightness of the colourity that shows Ye and high-high brightness YeR'+L YeG'+L YeB').
(3) to the explanation of RGB-RGBWYe signal conversion circuit 122
Figure 41 represents that the function of RGB-RGBWYe signal conversion circuit 122 constitutes.
RGB-RGBWYe signal conversion circuit 122, have the RGB-RGBW signal transformation part 131 that will be transformed to the RGBW signal by the rgb signal that contrary γ correction circuit 121 obtains and the RGBW signal that will obtain by RGB-RGBW signal transformation part 131 in rgb signal be transformed to the RGB-RGBYe signal transformation part 132 of RGBYe signal.
(4) to the explanation of RGB-RGBW signal transformation part 131
(4-1) to the explanation of the basic consideration of RGB-RGBW signal transformation
In the following description, will be called the RGB input signal by the rgb signal (not implementing the rgb signal that γ revises) that contrary γ correction circuit 121 obtains.
In this example, establish the RGB input signal values, as shown in figure 42, be R=200, G=170, B=100 by 8 bit representations.Because the minimum value of RGB input signal values is 100, so the RGB input signal values is decomposed into its minimum value shown in Figure 43 (min (RGB)) and remaining value (input signal-min (RGB)) shown in Figure 44.Under the situation of Figure 43, with the RGB input signal values all be 100 o'clock the white WT equivalence of target.
To be used to show the RGB input signal values all be that the RGBW signal value of 255 o'clock the white WT of target (255) is a signal value (77,0,204,255) shown in Figure 45 if establish, then be used to realize the RGB input signal values all be 100 o'clock the white WT of target (100) the RGBW signal value as shown in figure 46.Above-mentioned steps S86 by Figure 37 obtains signal value shown in Figure 45.
The R of Figure 46, G, B, W are obtained by following formula (20).
R＝77×100/255＝30
G＝0×100/255＝0
B＝204×100/255＝80
W＝255×100/255＝100 …(20)
Therefore, the rgb value of Figure 43 is replaced into the RGBW value of Figure 46.Therefore, the RGBW value addition by with rgb value and Figure 46 of Figure 44 is transformed to RGBW value shown in Figure 47 with rgb value shown in Figure 42.
The R of Figure 47, G, B, W are obtained by following formula (21).
R＝100+30＝130
G＝70+0＝70
B＝0+80＝80
W＝0+100＝100 …(21)
(4-2) explanation that RGB-RGBW signal transformation is handled
Figure 48 represents the RGB input signal is transformed to the step that signal transformation that the RGBW signal uses is handled.
At first, determine minimum value (min (RGB)) (step S101) in the RGB input signal.At the RGB input signal is under the situation of signal value shown in Figure 42, is min (RGB)-100.
Afterwards, from each RGB input signal, deduct min (RGB) (step S102).In the example of Figure 42, as shown in figure 44, the subtraction result of RGB is respectively 100,70,0.
Afterwards, be used to show the RGBW signal value that the RGB input signal values all is 255 o'clock the white WT of target (255), min (RGB) is transformed to RGBW signal (step S103).If establish and be used to realize that the RGBW signal value of the white WT of target (255) is a signal value shown in Figure 45, then in the example of Figure 42, as shown in figure 46 corresponding to the signal value of the RGBW signal of min (RGB).
Afterwards, by the signal value of the RGBW signal that will obtain by above-mentioned steps S103 and subtraction value { RGB-min (the RGB) } addition that above-mentioned steps S102 calculates, calculate RGBW signal (step S104) corresponding to the RGB input signal.In the example of Figure 42, as shown in figure 47 corresponding to the RGBW signal of RGB input signal.
Rgb signal in the RGBW signal that will be obtained by RGB-RGBW transform component 131 sends to RGB-RGBYe signal transformation part 132.W signal in the RGBW signal that is obtained by RGB-RGBW transform component 131 constitutes the W output signal of RGB-RGBWYe translation circuit 122.
(5) to the explanation of RGB-RGBYe signal transformation part 132
Figure 49 represents the RGB-RGBYe signal transformation treatment step of RGB-RGBYe signal transformation part 132
Here, the rgb signal with input RGB-RGBYe signal transformation part 132 is called the RGB input signal.
At first, judge that whether having signal value in the RGB input signal is 0 signal (step S111).Having signal value in the RGB input signal is under the situation of 0 signal, and the RGB input signal values is made as the output signal value of RGB, simultaneously, the output signal value of Ye is made as 0 (step S112).
Not having signal value in the RGB input signal is under the situation of 0 signal, calculate the rgb signal component, so that under situation about deducting from the RGB input signal as the rgb signal component that is transformed to the Ye signal from the RGB input signal that is transformed to the rgb signal component that the Ye signal obtains, at least one in the subtraction result of RGB is 0 (step S113).
If establishing the signal value of the RGB of the colourity that is used to show Ye and high-high brightness is R Ye, G Ye, B Ye, the rgb signal component that then is transformed to the Ye signal is by α (R Ye, G Ye, B Ye) represent.The signal value that is used to realize the RGB of the colourity of Ye and high-high brightness utilizes the step S93 of Figure 39 to obtain.Therefore, at first from the RGB input signal, deducting α (R Ye, G Ye, B Ye) situation under, obtain in the RGB subtraction result at least one and be 0 α.Particularly, if represent the RGB input signal, then calculate R/R with R, G, B Ye, G/G Ye, B/B Ye, and its minimum value is made as α.Afterwards, calculate α (R Ye, G Ye, B Ye).
For example, suppose that the RGBW input signal that is obtained by RGB-RGBW transform component 131 is the situation of Figure 47.At this moment, the RGB input signal is R=130, G=70, B=80.If establish the RGB maximum signal level (R of the colourity and the high-high brightness that are used to realize Ye Ye, G Ye, B Ye) be R Ye=213, G Ye=255, B Ye=128, then because the RGB input signal is R=130, G=70, B=80 is so there is R/R Ye=130/213=0.61, G/G Ye=70/255=0.27, B/B Ye=80/128=0.63 is so its minimum value is 0.27.Therefore, if be made as α=0.27, α R is arranged then Ye=58, α G Ye=70, α B Ye=35.That is, be transformed to the rgb signal component α (R of Ye signal Ye, G Ye, B Ye) as shown in figure 50.
Afterwards, from the RGB input signal, deduct the rgb signal component α (R that is transformed to the Ye signal Ye, G Ye, B Ye) (step S114).
In above-mentioned example, the subtraction result of R be 72 (=130-58), the subtraction result of G be 0 (=70-70), the subtraction result of B be 45 (=80-35).
Afterwards, the RGB subtraction result of above-mentioned steps S114 being calculated separately is as RGB output signal value (step S115).
In addition, with 255 * α as Ye output signal value (step S116).In above-mentioned example, the Ye signal becomes 70 (=0.27 * 255).That is, in above-mentioned example, the RGBYe output signal is shown in Figure 51.Therefore, final RGBWYe output signal is shown in Figure 52.

Claims (20)

1. the signal processing circuit of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, is set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white
It is characterized in that, have:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal.
2. the signal processing circuit of self-luminous display according to claim 1 is characterized in that, also has:
The 6th parts, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd parts is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd parts obtain, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st parts, the 2nd parts and the 3rd parts, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th parts, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th parts are not under 0 the situation, and the RGBW signal that will be calculated by the 6th parts is carried out and the same processing of the 6th parts as the RGBW signal of centre.
3. the signal processing circuit of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal;
The RGB-RGBW signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal;
With the γ correcting part, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white
And the RGB-RGBW signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained the RGBW signal.
4. the signal processing circuit of self-luminous display according to claim 3 is characterized in that, also has:
The 6th parts, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd parts is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd parts obtain, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st parts, the 2nd parts and the 3rd parts, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 7th parts, the minimum value in the rgb signal in the RGBW signal of being calculated by the 6th parts are not under 0 the situation, and the RGBW signal that will be calculated by the 6th parts is carried out and the same processing of the 6th parts as the RGBW signal of centre.
5. the signal processing circuit of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd parts to each RGB, are calculated the RGB input signal are made as initial term, the feedback rates of each RGB are made as the unlimited geometric progression sum of common ratio;
The 3rd parts deduct the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd parts from each input signal of RGB;
The 4th parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th parts for the RGBW signal of being calculated by above-mentioned the 4th parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd parts, are obtained the RGBW signal.
6. the signal processing circuit of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal;
The RGB-RGBW signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBW signal; With
The γ correcting part, to the RGBW signal that is obtained by the RGB-RGBW signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when the rgb signal that is obtained by contrary γ correcting part all is maximal value, be used to the RGBW signal value of realizing that target is white
And the RGB-RGBW signal transformation part has:
The 1st parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd parts to each RGB, are calculated the RGB input signal are made as initial term, the feedback rates of each RGB are made as the unlimited geometric progression sum of common ratio;
The 3rd parts deduct the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd parts from each input signal of RGB;
The 4th parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th parts for the RGBW signal of being calculated by above-mentioned the 4th parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd parts, are obtained the RGBW signal.
7. the signal processing method of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal.
8. the signal processing method of self-luminous display according to claim 7 is characterized in that, also has:
The 4th step, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd step is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd step obtains, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st step, the 2nd step and the 3rd step, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 5th step, the minimum value in the rgb signal in the RGBW signal of being calculated by the 4th step are not under 0 the situation, and the RGBW signal that will be calculated by the 4th step is carried out and the same processing of the 4th step as the RGBW signal of centre.
9. the signal processing method of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal;
RGB-RGBW signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBW signal; With
γ revises step, and to the RGBW signal that is obtained by RGB-RGBW signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when revising rgb signal that step obtains by contrary γ and all be maximal value, be used to the RGBW signal value of realizing that target is white
And RGB-RGBW signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained the RGBW signal.
10. the signal processing method of self-luminous display according to claim 9 is characterized in that, also has:
The 4th step, minimum value in the rgb signal in the RGBW signal of being calculated by the 3rd step is not under 0 the situation, RGBW signal in the middle of will being made as by the RGBW signal that the 3rd step obtains, regard the rgb signal in the RGBW signal of centre as the RGB input signal, by when calculating the RGBW signal with the same gimmick of the 1st step, the 2nd step and the 3rd step, with the W signal plus of the W signal in the RGBW signal of centre, generate the RGBW signal thus with the RGBW signal of calculating; With
The 5th step, the minimum value in the rgb signal in the RGBW signal of being calculated by the 4th step are not under 0 the situation, and the RGBW signal that will be calculated by the 4th step is carried out and the same processing of the 4th step as the RGBW signal of centre.
11. the signal processing method of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, it is characterized in that, have:
The 1st step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd step to each RGB, is calculated the RGB input signal is made as initial term, the feedback rates of each RGB is made as the unlimited geometric progression sum of common ratio;
The 3rd step deducts the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd step from each input signal of RGB;
The 4th step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th step for the RGBW signal of being calculated by above-mentioned the 4th step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd step, is obtained the RGBW signal.
12. the signal processing method of a self-luminous display, being 1 pixel is made of 4 unit picture elements of RGBW, and the RGB unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal;
RGB-RGBW signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBW signal; With
γ revises step, and to the RGBW signal that is obtained by RGB-RGBW signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step, only utilize RGB to realize that target is white, simultaneously with box lunch, be set with when revising rgb signal that step obtains by contrary γ and all be maximal value, be used to the RGBW signal value of realizing that target is white
And RGB-RGBW signal transformation step has:
The 1st step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the ratio of each signal value of this RGB, as the feedback rates of each RGB with respect to this W signal value;
The 2nd step to each RGB, is calculated the RGB input signal is made as initial term, the feedback rates of each RGB is made as the unlimited geometric progression sum of common ratio;
The 3rd step deducts the minimum value in the unlimited geometric progression sum of each RGB being calculated by the 2nd step from each input signal of RGB;
The 4th step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal; With
The 5th step for the RGBW signal of being calculated by above-mentioned the 4th step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 3rd step, is obtained the RGBW signal.
13. the signal processing circuit of a self-luminous display, be as the random colour beyond the RGB with X, constitute the signal processing circuit of the self-luminous display of a pixel by 4 unit picture elements of RGBX, setting can utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBX signal transformation part of RGBX signal,
And the RGB-RGBX signal transformation part has:
The 1st parts, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd parts deduct the rgb signal component of being calculated by the 1st parts, and export this subtraction result, as rgb signal from the RGB input signal; With
The 3rd parts, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st parts, as the X signal.
14. the signal processing circuit of a self-luminous display, be with X as the random colour beyond the RGB, constitute the signal processing circuit of the self-luminous display of a pixel by 4 unit picture elements of RGBX, it is characterized in that,
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal;
The RGB-RGBX signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBX signal; With
The γ correcting part, to the RGBW signal that is obtained by the RGB-RGBX signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Rgb signal before will being revised by the γ that contrary γ correcting part obtains is as object, is set with the signal value that is used for being realized by rgb signal the RGB of the colourity of X and high-high brightness,
And the RGB-RGBX signal transformation part has:
The 1st parts, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd parts deduct the rgb signal component of being calculated by the 1st parts, and export this subtraction result, as rgb signal from the RGB input signal; With
The 3rd parts, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st parts, as the X signal.
15. the signal processing method of a self-luminous display, be as the random colour beyond the RGB with X, constitute the signal processing method of the self-luminous display of a pixel by 4 unit picture elements of RGBX, wherein be set with and utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBX signal transformation step of RGBX signal,
And RGB-RGBX signal transformation step has:
The 1st step, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd step deducts the rgb signal component of being calculated by the 1st step, and exports this subtraction result, as rgb signal from the RGB input signal; With
The 3rd step, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st step, as the X signal.
16. the signal processing method of a self-luminous display, be with X as the random colour beyond the RGB, constitute the signal processing method of the self-luminous display of a pixel by 4 unit picture elements of RGBX, it is characterized in that,
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal;
RGB-RGBX signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBX signal; With
γ revises step, and to the RGBW signal that is obtained by RGB-RGBX signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Rgb signal before will being revised γ that step obtains and be revised by contrary γ is as object, is set with the signal value that is used for being realized by rgb signal the RGB of the colourity of X and high-high brightness,
And RGB-RGBX signal transformation step has:
The 1st step, signal value according to the RGB that is used to realize above-mentioned X colourity and high-high brightness, calculate as the rgb signal component that from the RGB input signal, is transformed into the rgb signal component that the X signal obtains, so that deducting from the RGB input signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 2nd step deducts the rgb signal component of being calculated by the 1st step, and exports this subtraction result, as rgb signal from the RGB input signal; With
The 3rd step, output is equivalent to the X signal of the rgb signal component of being calculated by the 1st step, as the X signal.
17. the signal processing circuit of a self-luminous display, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with and when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, with utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBWX signal transformation part of RGBWX signal,
And the RGB-RGBWX signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th parts, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd parts, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th parts by deduct the rgb signal component of being calculated by the 1st parts from 1R signal, 1G signal and 1B signal, are calculated 2R signal, 2G signal and 2B signal;
The 6th parts are calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th parts; With
The 7th parts, the W signal that output is obtained by the 3rd parts, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th parts and the X signal that is obtained by the 6th parts are as the RGBWX signal corresponding to above-mentioned RGB input signal.
18. the signal processing circuit of a self-luminous display, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing circuit of the self-luminous display of color filter, it is characterized in that
Have: contrary γ correcting part, by being carried out contrary γ, the RGB input signal that is subjected to the γ correction in advance revises, and the RGB input signal is transformed to γ revises preceding rgb signal;
The RGB-RGBWX signal transformation part will be made as the RGB input signal by the rgb signal that contrary γ correcting part obtains, and the RGB input signal will be transformed to the RGBWX signal; With
The γ correcting part, to the RGBWX signal that is obtained by the RGB-RGBWX signal transformation part, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against the γ correcting part with box lunch, only utilize RGB to realize that target is white, simultaneously, be set with and when the rgb signal that is obtained by contrary γ correcting part all be maximal value, be used to realize the RGBW signal value that target is white and utilize the signal value of realizing the RGB of the colourity of X and high-high brightness by the rgb signal that obtains against the γ correcting part
The RGB-RGBWX signal transformation part has:
The 1st parts deduct the minimum value in the RGB input signal from each input signal of RGB;
The 2nd parts, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd parts for the RGBW signal of being calculated by above-mentioned the 2nd parts, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st parts, are obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th parts, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd parts, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th parts by deduct the rgb signal component of being calculated by the 1st parts from 1R signal, 1G signal and 1B signal, are calculated 2R signal, 2G signal and 2B signal;
The 6th parts are calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th parts; With
The 7th parts, the W signal that output is obtained by the 3rd parts, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th parts and the X signal that is obtained by the 6th parts are as the RGBWX signal corresponding to above-mentioned RGB input signal.
19. the signal processing method of a self-luminous display, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, wherein be set with the white side reference brightness of RGB, when all being identical value with convenient RGB input signal, only utilize RGB to realize that target is white, simultaneously, be set with and when the RGB input signal all is maximal value, be used to realize target RGBW signal value certainly, with utilize rgb signal to realize the signal value of the RGB of the colourity of X and high-high brightness, it is characterized in that
Have: the RGB input signal is transformed to the RGB-RGBWX signal transformation step of RGBWX signal,
And RGB-RGBWX signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th step, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd step, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th step by deduct the rgb signal component of being calculated by the 1st step from 1R signal, 1G signal and 1B signal, is calculated 2R signal, 2G signal and 2B signal;
The 6th step is calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th step; With
The 7th step, the W signal that output is obtained by the 3rd step, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th step and the X signal that is obtained by the 6th step are as the RGBWX signal corresponding to above-mentioned RGB input signal.
20. the signal processing method of a self-luminous display, be as the random colour beyond the RGBW with X, constitute a pixel by 5 unit picture elements such as RGBWX, the RGBX unit picture element is provided with color filter, the W unit picture element is not provided with the signal processing method of the self-luminous display of color filter, it is characterized in that:
Have: contrary γ revises step, revises by the RGB input signal that is subjected to the γ correction is in advance carried out contrary γ, the RGB input signal is transformed to γ revises preceding rgb signal; RGB-RGBWX signal transformation step will be made as the RGB input signal by the rgb signal that contrary γ correction step obtains, and the RGB input signal will be transformed to the RGBWX signal; Revise step with γ, to the RGBWX signal that is obtained by RGB-RGBWX signal transformation step, the γ that carries out corresponding to self-luminous display revises,
Be set with the white side reference brightness of RGB, when all being identical value by the rgb signal that obtains against γ correction step with box lunch, only utilize RGB to realize that target is white, simultaneously, be set with when revising and be used to realize the RGBW signal value that target is white when rgb signal that step obtains all be maximal value and utilize the rgb signal that obtains by contrary γ correction step to realize the signal value of the RGB of the colourity of X and high-high brightness by contrary γ
And RGB-RGBWX signal transformation step has:
The 1st step deducts the minimum value in the RGB input signal from each input signal of RGB;
The 2nd step, according to when the RGB input signal all is maximal value, be used to the RGBW signal value of realizing that target is white, calculate the RGBW signal when all being above-mentioned minimum value corresponding to the RGB input signal;
The 3rd step for the RGBW signal of being calculated by above-mentioned the 2nd step, by the subtraction result and corresponding signal plus of each RGB that will be calculated by the 1st step, is obtained 1R signal, 1G signal, 1B signal and W signal;
The 4th step, according to the signal value that is used for realizing the RGB of X colourity and high-high brightness by rgb signal, calculate as the rgb signal component that from the 1R signal, 1G signal and the 1B signal that obtain by the 3rd step, is transformed into the rgb signal component that the X signal obtains, so that deducting from 1R signal, 1G signal and 1B signal under the situation that is transformed into the rgb signal component that the X signal obtains, at least one in the subtraction result of RGB becomes 0;
The 5th step by deduct the rgb signal component of being calculated by the 1st step from 1R signal, 1G signal and 1B signal, is calculated 2R signal, 2G signal and 2B signal;
The 6th step is calculated the X signal that is equivalent to the rgb signal component of being calculated by the 4th step; With
The 7th step, the W signal that output is obtained by the 3rd step, the 2R signal, 2G signal and the 2B signal that are obtained by the 5th step and the X signal that is obtained by the 6th step are as the RGBWX signal corresponding to above-mentioned RGB input signal.
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