WO2017004817A1 - 一种图像显示方法以及显示系统 - Google Patents
一种图像显示方法以及显示系统 Download PDFInfo
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
- G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/77—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase
- H04N9/78—Circuits for processing the brightness signal and the chrominance signal relative to each other, e.g. adjusting the phase of the brightness signal relative to the colour signal, correcting differential gain or differential phase for separating the brightness signal or the chrominance signal from the colour television signal, e.g. using comb filter
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- the present invention relates to the field of display technologies, and in particular, to an image display method and a display system.
- an image display device such as a liquid crystal display panel (LCD) or an organic light emitting display panel (OLED)
- LCD liquid crystal display panel
- OLED organic light emitting display panel
- the pixel unit displays a color image by controlling the grayscale value of each sub-pixel and mixing the color to be displayed.
- various demands for display panels are also increasing. High transmittance, low power consumption, and good image quality have also become demand for display panels.
- the existing RGB three primary color mixed light display mode has relatively low transmittance and mixing efficiency, resulting in large power consumption of the display panel, which restricts product optimization of the display panel.
- an RGBW four-pixel display unit composed of a red (R) sub-pixel, a green (G) sub-pixel, a blue (B) sub-pixel, and a white (W) sub-pixel appears to improve the display quality of the RGB display panel. .
- RGBW four-pixel display The advantages of using RGBW four-pixel display are: (1), the resolution of sub-pixels is increased by 1/4; (2), the transmittance of pixels is increased by 50%; (3), the color of RGBW is 11/16 more than RGB.
- the transmission interface of the signal is generally an RGB three-pixel transmission interface. If the RGB three-pixel data signal is directly applied to the RGBW four-pixel display panel, the image distortion will be caused, so the conversion of the RGB three-pixel data signal is required. The data signal of RGBW four pixels is input into the corresponding sub-pixel of the display panel.
- RGB three-pixel data signals into RGBW four-pixel data signals mainly adopts the following methods:
- the grayscale values R, G, and B corresponding to the RGB three-pixel data signals are obtained; then, the grayscale values R', G' corresponding to the data signals of the RGBW four-pixel data are calculated according to the following formulas (1) and (2), B' and W'.
- X takes the gray scale value R, G or B, respectively, and min(R, G, B) is the minimum value of the gray scale values R, G and B, max(R, G, B) are the maximum values of the grayscale values R, G, and B.
- the original gray scale values R, G, and B are directly calculated by one step to obtain new gray scale values R', G', B', and W', and the new gray scale values R', G', B ' and W' do not maintain the chromaticity and saturation of the original grayscale values R, G, B well.
- the object of the present invention is to provide an image display method, which is mainly applied to a display panel having RGBW four pixels, and the converted gray scale values R', G by improving the data signal conversion method.
- ', B' and W' can well maintain the chromaticity and saturation of the original grayscale values R, G, B.
- An image display method for a four-color pixel display panel includes a plurality of pixel units, each of the pixel units including a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel, wherein The method includes: providing a three-color pixel data signal of an image, the three-color pixel data signal including a first red grayscale value R, a first green grayscale value G, and a first blue grayscale value B; a first red luminance value LR, a first green luminance value LG, and a first blue luminance value LB corresponding to a red grayscale value R, a first green grayscale value G, and a first blue grayscale value B; The first red luminance value LR, the first green luminance value LG, and the first blue luminance value LB are converted into a second red luminance value LR', a second green luminance value LG', and a second blue adapted to the four-color pixel display panel.
- a color luminance value LB' acquiring a second red grayscale value R' corresponding to the second red luminance value LR', the second green luminance value LG', and the second blue luminance value LB', and a second green grayscale value G' And a second blue grayscale value B'; obtaining a first red grayscale value R, first The green grayscale value G and the minimum value min(R, G, B) in the first blue grayscale value B, as the white grayscale value W'; providing the second red grayscale value R', the second green grayscale value G' and the second blue grayscale value B', and the white grayscale value W' to the red subpixel, green The sub-pixel, the blue sub-pixel, and the white sub-pixel are such that the four-color pixel display panel displays the image.
- X' is LR', LG' or LB', respectively, and correspondingly, X takes a luminance value LR , LG or LB, max (LR, LG, LB) and min (LR, LG, LB) are the maximum and minimum values of the luminance values LR, LG, and LB, respectively.
- the conversion between the grayscale value and the luminance value is obtained by the gamma curve.
- the conversion between the grayscale value and the luminance value is obtained by displaying a lookup table.
- the display panel is a liquid crystal display panel or an organic light emitting display panel.
- the present invention also provides an image display system comprising: a display panel, the display panel comprising a plurality of pixel units, each pixel unit comprising a red sub-pixel, a green sub-pixel, a blue sub-pixel, and a white sub-pixel; a brightness conversion unit receives the first red grayscale value R, the first green grayscale value G, and the first blue grayscale value B of the image, and converts into a corresponding first red luminance value LR and a first green luminance value LG.
- the first blue luminance value LB is input to the maximum value determining unit and the brightness compensation unit; a maximum value determining unit receives the first red luminance value LR, the first green luminance value LG, and the first output from the luminance conversion unit Blue luminance value LB, determination maximum value max (LR, LG, LB) and minimum value min (LR, LG, LB) input luminance compensation unit; first red grayscale value R of the received image, first green grayscale value G and the first blue grayscale value B, the minimum value min(R, G, B) is determined, and is output as a white grayscale value W'; a luminance compensation unit receives the first red luminance output from the luminance conversion unit Value LR, first green brightness value LG, and first blue Value LB, max determination unit receiving the output from the best value (LR, LG, LB), and Min (LR, LG, LB), according to the received data, calculate a second red luminance value LR', a second green luminance value LG' and a second blue luminance value LB' are input
- the brightness compensation unit is according to a formula:
- a second red luminance value LR' a second green luminance value LG', and a second blue luminance value LB'.
- X' is respectively LR', LG' or LB', and correspondingly, X is respectively taken
- the luminance values LR, LG or LB, max(LR, LG, LB) and min(LR, LG, LB) are the maximum and minimum values among the luminance values LR, LG and LB, respectively.
- the brightness conversion unit and the brightness inversion unit convert the gray scale value and the brightness value according to the gamma curve.
- the brightness conversion unit and the brightness inversion unit convert the grayscale value and the brightness value according to the display lookup table.
- the image display method and the display system provided by the present invention first convert the gray scale value into the corresponding brightness value in the process of converting the data signals of the RGB three pixels into the data signals of the RGBW four pixels. After the compensation is calculated by the luminance value, the luminance value corresponding to the four-pixel data signal is obtained, and then the luminance value of the four-pixel data signal is converted into the grayscale value.
- the luminance value corresponding to the four-pixel data signal is obtained, and then the luminance value of the four-pixel data signal is converted into the grayscale value.
- the intermediate value of the order transition is such that the converted grayscale values R', G', B', and W' maintain the chromaticity and saturation of the original grayscale values R, G, B well.
- FIG. 1 is a structural block diagram of an image display system according to an embodiment of the present invention.
- the embodiment provides an image display system.
- the system mainly includes a display panel 10 , a brightness conversion unit 20 , a maximum value determination unit 30 , a brightness compensation unit 40 , and a brightness inversion unit 50 .
- the display panel 10 includes a plurality of pixel units 10a, and each of the pixel units 10a includes a red sub-pixel 101, a green sub-pixel 102, a blue sub-pixel 103, and a white sub-pixel 104.
- the display panel 10 may be a liquid crystal display panel or an organic light emitting display panel.
- the brightness conversion unit 20 receives the first red grayscale value R, the first green grayscale value G, and the first blue grayscale value B of the image, and converts the grayscale values R, G, and B into The corresponding first red luminance value LR, first green luminance value LG, and first blue luminance value LB are input to the maximum value determination unit 30 and the luminance compensation unit 40.
- the most value determining unit 30 receives the first red luminance value LR, the first green luminance value LG, and the first blue luminance value LB output from the luminance conversion unit 20 on the one hand, and determines the maximum value max(LR, LG, LB) and the minimum value min (LR, LG, LB) are input to the brightness compensation unit 40.
- the maximum value determining unit 30 receives the first red grayscale value R, the first green grayscale value G, and the first blue grayscale value B of the image, and determines the minimum value min(R, G, B), which will Min(R, G, B) is output as a white grayscale value W'.
- the brightness compensation unit 40 receives on the one hand the first red brightness value LR, the first green brightness value LG and the first blue brightness value LB output from the brightness conversion unit 20, and on the other hand receives from the The max value (LR, LG, LB) and min (LR, LG, LB) output by the maximum value determining unit 30. Further, the brightness compensation unit 40 calculates a second red brightness value LR', a second green brightness value LG', and a second blue brightness value LB' adapted to the RGBW four-color pixel display panel according to the received data. And inputting the second red luminance value LR', the second green luminance value LG', and the second blue luminance value LB' to the luminance inversion unit 50.
- the brightness inversion unit 50 receives the second red brightness value LR', the second green brightness value LG', and the second blue brightness value LB' output from the brightness compensation unit 40, and the brightness values LR' LG' and LB' are converted to corresponding second red grayscale values R', second green grayscale values G', and second blue grayscale values B'.
- the red sub-pixel 101, the green sub-pixel 102, and the blue sub-pixel in the display panel 10 respectively receive the second red grayscale value R' and the second green grayscale value G' output by the brightness inversion unit 50.
- the second blue grayscale value B', the white subpixel 104 receives the white grayscale value W' output from the maximum value determining unit 30, and finally displays the image on the display panel 10.
- the display method of the display system as described above includes the steps of:
- the three-color pixel data signal including a first red grayscale value R, a first green grayscale value G, and The first blue grayscale value B.
- the brightness conversion unit 20 converts the first red grayscale value R, the first green grayscale value G, and the first blue grayscale value B into a corresponding first red luminance value LR, a first green luminance value LG, and
- the first blue luminance value LB is input to the maximum value determination unit 30 and the luminance compensation unit 40.
- the conversion between the grayscale value and the luminance value is obtained by the gamma curve, and the value of gamma is preferably 2.2.
- the conversion between the grayscale value and the luminance value may also be obtained by displaying a Look-Up-Table (LUT).
- LUT Look-Up-Table
- the maximum value determining unit 30 first determines the maximum value max(LR, LG, LB) and the minimum value min (LR, LG,) of the first red luminance value LR, the first green luminance value LG, and the first blue luminance value LB. LB) is input to the brightness compensation unit 40.
- the maximum value determining unit 30 also determines the first red grayscale value R, the first green grayscale
- the value G and the minimum value min(R, G, B) of the first blue grayscale value B are supplied to the white sub-pixel 104 of the display panel 10 as min white (g, B, B) as the white grayscale value W'.
- the brightness compensation unit 40 is based on the first red brightness value LR, the first green brightness value LG, and the first blue brightness value LB, and the maximum values max(LR, LG, LB) and the minimum value min(LR, LG, LB), a second red luminance value LR', a second green luminance value LG', and a second blue luminance value LB' adapted to the four-color pixel display panel are calculated. Specifically, this step is performed according to the following formula:
- X' is respectively LR', LG' or LB', and correspondingly, X takes the luminance values LR, LG or LB, respectively.
- the brightness inversion unit 50 converts the second red brightness value LR', the second green brightness value LG', and the second blue brightness value LB' into corresponding second red grayscale values R' and second green gray.
- the order value G' and the second blue gray scale value B' are correspondingly supplied to the red sub-pixel 101, the green sub-pixel 102, and the blue sub-pixel in the display panel 10.
- the conversion between the grayscale value and the luminance value is obtained by the gamma curve, and the value of gamma is preferably 2.2.
- the conversion between the grayscale value and the luminance value may also be obtained by displaying a Look-Up-Table (LUT).
- LUT Look-Up-Table
- the display panel 10 displays the desired image after receiving the second red luminance value LR', the second green luminance value LG', the second blue luminance value LB', and the white grayscale value W'.
- the image display method and the display system provided by the present invention convert the grayscale value into a corresponding luminance value in the process of converting the data signals of the RGB three pixels into the data signals of the RGBW four pixels.
- the luminance value is calculated and compensated to obtain a luminance value corresponding to the four-pixel data signal, and then the luminance value of the four-pixel data signal is converted into a grayscale value.
- the converted grayscale values R', G', B', and W' can well maintain the original grayscale value R, The chromaticity and saturation of G and B.
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Abstract
一种图像显示方法,该方法包括:提供一图像的三色像素数据信号R、G和B;将灰阶值R、G和B转换为对应的亮度值LR、LG和LB;将亮度值LR、LG和LB通过补偿计算获得适应于四色像素显示面板的亮度值LR'、LG'和LB';将亮度值LR'、LG'和LB'转换为对应的灰阶值R'、G'和B';取灰阶值R、G和B中的最小值作为白色灰阶值W';将得到的灰阶值R'、G'、B'以及W'对应提供给四色像素显示面板的红色子像素、绿色子像素、蓝色子像素以及白色子像素,以使该四色像素显示面板显示该图像。还提供了一种实现如上该显示方法的图像显示系统。
Description
本发明涉及显示器技术领域,尤其涉及一种图像显示方法以及显示系统。
目前,在例如液晶显示面板(LCD)或有机发光显示面板(OLED)的图像显示设备中,均是以红色(R)子像素、绿色(G)子像素和蓝色(B)子像素组成一个像素单元,通过控制每个子像素的的灰阶值,混合出所需要显示的色彩来显示彩色图像。随着信息技术的发展,对于显示面板的各种需求也在增加,高透过率、低功耗、成像质量佳也成为人们对显示面板的需求。现有的RGB三原色混光显示方式的透过率以及混合效率都比较低,导致显示面板的功耗大,制约了显示面板的产品优化。基于此,出现了由红色(R)子像素、绿色(G)子像素、蓝色(B)子像素和白色(W)子像素组成一个RGBW四像素显示单元,以改善RGB显示面板的显示质量。
采用RGBW四像素显示的优势为:(1)、子像素的解析度增加1/4;(2)、像素的穿透率增加50%;(3)、RGBW的色彩比RGB多11/16。目前信号的传输接口一般都是RGB三像素的传输接口,若将RGB三像素的数据信号直接应用于RGBW四像素的显示面板中,会导致图像失真,因此需要将RGB三像素的数据信号的转换为RGBW四像素的数据信号,再输入到显示面板对应的子像素中。
目前,将RGB三像素的数据信号的转换为RGBW四像素的数据信号主要采用以下方法:
W′=min(R,G,B)--------------------------(2)
上述公式(1)和公式(2)中,X分别取灰阶值R、G或B,min(R,G,B)是灰阶值R、G和B中的最小值,max(R,G,B)是灰阶值R、G和B中的最大值。
如上的转换方法中,直接采用原始灰阶值R、G、B经过一步计算得到新的灰阶值R′、G′、B′和W′,新的灰阶值R′、G′、B′和W′无法很好地维持原始灰阶值R、G、B的色度和饱和度。
发明内容
鉴于现有技术存在的不足,本发明目的是提供一种图像显示方法,主要应用于具有RGBW四像素的显示面板,通过对数据信号转换方法的改进,使得转换后的灰阶值R′、G′、B′和W′可以很好地维持原始灰阶值R、G、B的色度和饱和度。
为了实现上述目的,本发明采用了如下的技术方案:
一种图像显示方法,用于四色像素显示面板,所述四色像素显示面板包括多个像素单元,每一像素单元包括红色子像素、绿色子像素、蓝色子像素以及白色子像素,其中,该方法包括:提供一图像的三色像素数据信号,所述三色像素数据信号包括第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B;获取第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB;将所述第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB转换为适应于四色像素显示面板的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′;获取第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′;获取第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B中的最小值min(R,G,B),作为白色灰阶值
W′;将所述第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′以及白色灰阶值W′对应提供给所述红色子像素、绿色子像素、蓝色子像素以及白色子像素,以使所述四色像素显示面板显示所述图像。
其中,根据公式:
二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′,上述公式中,X′分别为LR′、LG′或LB′,对应地,X分别取亮度值LR、LG或LB,max(LR,LG,LB)和min(LR,LG,LB)分别是亮度值LR、LG和LB中的最大值和最小值。
其中,灰阶值与亮度值之间的转换通过gamma曲线获取。
其中,灰阶值与亮度值之间的转换通过显示查找表获取。
其中,所述显示面板为液晶显示面板或有机发光显示面板。
本发明还提供了一种图像显示系统,其包括:一显示面板,所述显示面板包括多个像素单元,每一像素单元包括红色子像素、绿色子像素、蓝色子像素以及白色子像素;一亮度转换单元,接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,转换为对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB输入到最值判定单元和亮度补偿单元;一最值判定单元,接收从所述亮度转换单元输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,判定最大值max(LR,LG,LB)和最小值min(LR,LG,LB)输入亮度补偿单元;接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,判定最小值min(R,G,B),作为白色灰阶值W′输出;一亮度补偿单元,接收从所述亮度转换单元输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,接收从所述最值判定单元输出的max(LR,LG,LB)和
min(LR,LG,LB),根据接收到的该些数据,计算出第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′输入到亮度反转单元;一亮度反转单元,接收从所述亮度补偿单元输出的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′,转换为对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′输出;其中,所述红色子像素、绿色子像素、蓝色子像素以及白色子像素分别接收所述第二红色灰阶值R′、第二绿色灰阶值G′、第二蓝色灰阶值B′以及白色灰阶值W′,以使所述显示面板显示所述图像。
其中,所述亮度补偿单元根据公式:
其中,所述亮度转换单元和所述亮度反转单元根据gamma曲线对灰阶值与亮度值进行转换。
其中,所述亮度转换单元和所述亮度反转单元根据显示查找表对灰阶值与亮度值进行转换。
相比于现有技术,本发明提供的图像显示方法以及显示系统,在将RGB三像素的数据信号的转换为RGBW四像素的数据信号的过程中,首先将灰阶值转换为对应的亮度值,通过亮度值计算补偿后得到对应于四像素数据信号的亮度值,然后再将四像素数据信号的亮度值转换为灰阶值。通过采用亮度值作为灰
阶转换的中间值,使得转换后的灰阶值R′、G′、B′和W′可以很好地维持原始灰阶值R、G、B的色度和饱和度。
图1是本发明一实施例提供的图像显示系统的结构框图。
下面将结合附图以及具体实施例,对本发明实施例中的技术方案进行详细地描述,显然,所描述的实施例仅仅是本发明一部分实例,而不是全部实施例。基于本发明中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本发明保护范围。
参阅图1,本实施例提供了一种图像显示系统,该系统主要包括:显示面板10、亮度转换单元20、最值判定单元30、亮度补偿单元40以及亮度反转单元50。
其中,所述显示面板10包括多个像素单元10a,每一像素单元10a包括红色子像素101、绿色子像素102、蓝色子像素103以及白色子像素104。所述显示面板10可以是液晶显示面板或有机发光显示面板。
其中,所述亮度转换单元20接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,并将该些灰阶值R、G、B转换为对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB输入到最值判定单元30和亮度补偿单元40。
其中,最值判定单元30一方面接收从所述亮度转换单元20输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,判定最大值max(LR,LG,LB)和最小值min(LR,LG,LB)输入到亮度补偿单元40。另一方面,最值判定单元30接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,判定最小值min(R,G,B),将min(R,G,B)作为白色灰阶值W′输出。
其中,亮度补偿单元40一方面接收从所述亮度转换单元20输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,另一方面接收从所述
最值判定单元30输出的max(LR,LG,LB)和min(LR,LG,LB)。进一步地,亮度补偿单元40根据接收到的该些数据,计算出适应于RGBW四色像素显示面板的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′,并将第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′输入到亮度反转单元50。
其中,亮度反转单元50接收从所述亮度补偿单元40输出的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′,并将该些亮度值LR′、LG′和LB′转换为对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′输出。
其中,所述显示面板10中的红色子像素101、绿色子像素102和蓝色子像素分别接收亮度反转单元50输出的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′,白色子像素104则接收从所述最值判定单元30输出的白色灰阶值W′,最终在所述显示面板10上显示所述图像。
如上所述的显示系统的显示方法包括步骤:
一、将图像的三色像素(RGB)数据信号输入到亮度转换单元20和最值判定单元30,所述三色像素数据信号包括第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B。
二、亮度转换单元20将第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,转换为对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB输入到最值判定单元30和亮度补偿单元40。灰阶值与亮度值之间的转换通过gamma曲线获取,gamma的取值优选为2.2。在另外的一些实施例中,灰阶值与亮度值之间的转换也可以是通过显示查找表(Look-Up-Table,LUT)获取。
三、最值判定单元30首先判定第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB中最大值max(LR,LG,LB)和最小值min(LR,LG,LB),输入到亮度补偿单元40。最值判定单元30还判定第一红色灰阶值R、第一绿色灰阶
值G和第一蓝色灰阶值B的最小值min(R,G,B),将min(R,G,B)作为白色灰阶值W′提供给显示面板10的白色子像素104。
四、亮度补偿单元40根据第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,以及三者的最大值max(LR,LG,LB)和最小值min(LR,LG,LB),计算出适应于四色像素显示面板的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′。具体地,该步骤根据如下公式进行:
其中,X′分别为LR′、LG′或LB′,对应地,X分别取亮度值LR、LG或LB。
五、亮度反转单元50将第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB′,转换为对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B′,相应地提供给显示面板10中的红色子像素101、绿色子像素102和蓝色子像素。其中,灰阶值与亮度值之间的转换通过gamma曲线获取,gamma的取值优选为2.2。在另外的一些实施例中,灰阶值与亮度值之间的转换也可以是通过显示查找表(Look-Up-Table,LUT)获取。
六、显示面板10接收到第二红色亮度值LR′、第二绿色亮度值LG′、第二蓝色亮度值LB′以及白色灰阶值W′后显示想应的图像。
综上所述,本发明提供的图像显示方法以及显示系统,在将RGB三像素的数据信号的转换为RGBW四像素的数据信号的过程中,首先将灰阶值转换为对应的亮度值,通过亮度值计算补偿后得到对应于四像素数据信号的亮度值,然后再将四像素数据信号的亮度值转换为灰阶值。通过采用亮度值作为灰阶转换的中间值,使得转换后的灰阶值R′、G′、B′和W′可以很好地维持原始灰阶值R、
G、B的色度和饱和度。
需要说明的是,在本文中,诸如第一和第二等之类的关系术语仅仅用来将一个实体或者操作与另一个实体或操作区分开来,而不一定要求或者暗示这些实体或操作之间存在任何这种实际的关系或者顺序。而且,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。
以上所述仅是本申请的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本申请原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本申请的保护范围。
Claims (12)
- 一种图像显示方法,用于四色像素显示面板,所述四色像素显示面板包括多个像素单元,每一像素单元包括红色子像素、绿色子像素、蓝色子像素以及白色子像素,其中,该方法包括:提供一图像的三色像素数据信号,所述三色像素数据信号包括第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B;获取第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB;将所述第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB转换为适应于四色像素显示面板的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB;获取第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B;获取第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B中的最小值min(R,G,B),作为白色灰阶值W′;将所述第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B以及白色灰阶值W′对应提供给所述红色子像素、绿色子像素、蓝色子像素以及白色子像素,以使所述四色像素显示面板显示所述图像。
- 根据权利要求1所述的图像显示方法,其中,灰阶值与亮度值之间的转换通过gamma曲线获取。
- 根据权利要求3所述的图像显示方法,其中,所述gamma曲线中gamma的取值为2.2。
- 根据权利要求1所述的图像显示方法,其中,灰阶值与亮度值之间的转换通过显示查找表获取。
- 根据权利要求1所述的图像显示方法,其中,所述显示面板为液晶显示面板或有机发光显示面板。
- 一种图像显示系统,其中,包括:一显示面板,所述显示面板包括多个像素单元,每一像素单元包括红色子像素、绿色子像素、蓝色子像素以及白色子像素;一亮度转换单元,接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,转换为对应的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB输入到最值判定单元和亮度补偿单元;一最值判定单元,接收从所述亮度转换单元输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,判定最大值max(LR,LG,LB)和最小值min(LR,LG,LB)输入亮度补偿单元;接收图像的第一红色灰阶值R、第一绿色灰阶值G和第一蓝色灰阶值B,判定最小值min(R,G,B),作为白色灰阶值W′输出;一亮度补偿单元,接收从所述亮度转换单元输出的第一红色亮度值LR、第一绿色亮度值LG和第一蓝色亮度值LB,接收从所述最值判定单元输出的max(LR,LG,LB)和min(LR,LG,LB),根据接收到的该些数据,计算出第二红色 亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB输入到亮度反转单元;一亮度反转单元,接收从所述亮度补偿单元输出的第二红色亮度值LR′、第二绿色亮度值LG′和第二蓝色亮度值LB,转换为对应的第二红色灰阶值R′、第二绿色灰阶值G′和第二蓝色灰阶值B输出;其中,所述红色子像素、绿色子像素、蓝色子像素以及白色子像素分别接收所述第二红色灰阶值R′、第二绿色灰阶值G′、第二蓝色灰阶值B以及白色灰阶值W′,以使所述显示面板显示所述图像。
- 根据权利要求7所述的图像显示系统,其中,所述亮度转换单元和所述亮度反转单元根据gamma曲线对灰阶值与亮度值进行转换。
- 根据权利要求9所述的图像显示系统,其中,所述gamma曲线中gamma的取值为2.2。
- 根据权利要求7所述的图像显示系统,其中,所述亮度转换单元和所述亮度反转单元根据显示查找表对灰阶值与亮度值进行转换。
- 根据权利要求7所述的图像显示系统,其中,所述显示面板为液晶显示面板或有机发光显示面板。
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