This application is based upon and claims priority to Chinese Patent Application No. 201510541342.9, filed on Aug. 28, 2015, the entire contents of which are incorporated herein by reference.
The present disclosure relates to the technical field of display technology, particularly, to a display panel, a display device and a display method.
With the development of optical technology and semiconductor technology, flat display panels such as liquid crystal display (LCD) panels and organic light emitting diode (OLED) display panels have been widely applied in various electronic products for their characteristics of having a slimmer shape, a lower cost and power consumption, faster response speed, better color purity and brightness, higher contrast ratio, and the like.
Currently, as the continuously increasing of size and resolution of the display panel, power consumption becomes higher and higher, and it becomes a current major problem to effectively reduce the power consumption of the display panel. Compared with a conventional standard RGB (Red, Green and Blue) display panel, a standard WRGB (White, Red, Green and Blue) display panel may increase brightness of the display panel and meanwhile may effectively reduce power consumption of the display panel, and thus has been paid increasingly attention.
The present disclosure is directed to providing a display panel, a display device and a display method, so as to overcome, at least to some extent, one or more problems due to restrictions and defects in the related art.
Other properties and advantages of the present disclosure will become more apparent from the flowing detailed description, or in part, may be learned from the practice of the present disclosure.
According to a first aspect of the present disclosure, provided is a display panel including at least a first sub pixel column to a third sub pixel column that are sequentially arranged, wherein:
the first sub pixel column is formed of 2N first color sub pixels, wherein N is a positive integer;
the second sub pixel column is formed of 2N second color sub pixels and is offset by a predetermined pitch in a column direction with respect to the first sub pixel column; and
the third sub pixel column is formed of alternate N third color sub pixels and N white sub pixels,
wherein each of the second color sub pixels together forms a pixel unit with its adjacent one white sub pixel, one third color sub pixel and two first color sub pixels, to perform display.
According to a second aspect of the present disclosure, provided is a display device including:
a display panel described above.
According to a third aspect of the present disclosure, provided is a display method applied in a display panel, the display panel including at least a first sub pixel column to a third sub pixel column that are sequentially arranged, wherein: the first sub pixel column is formed of 2N first color sub pixels, wherein N is a positive integer, the second sub pixel column is formed of 2N second color sub pixels and is offset by a predetermined pitch in a column direction with respect to the first sub pixel column; and the third sub pixel column is formed of alternate N third color sub pixels and N white sub pixels, wherein each of the second color sub pixels together forms a pixel unit with its adjacent one white sub pixel, one third color sub pixel and two first color sub pixels, to perform display. The method including:
according to a first sub pixel rendering algorithms, converting a brightness value of each sub pixel in a first virtual pixel array corresponding to an image to be displayed into a brightness value of each sub pixel in the pixel unit.
In the display panel, display device and display method in the exemplary embodiments of the present disclosure, by providing a new RGBW pixel matrix structure, on one hand, the transmittance of the display panel may be effectively increased, thereby reducing power consumption; meanwhile, white sub pixels are arranged in a dispersed manner, thereby bright bars may be prevented from occurring; and such a pixel matrix structure may uniformly distribute brightness of the pixel unit in each direction, thereby improving overall rendering effects and providing a better view angle. On the other hand, the pixel matrix, combining with a corresponding sub pixel rendering algorithm, may visually provide a PPI substantially close to a standard RGB display panel; meanwhile, compared with a typical standard RGBW pixel matrix, a number of sub pixels may be greatly reduced and correspondingly reducing the wirings such as data lines, an aperture ratio of the display device may be efficiently increased while reducing a cost and lowering process difficulty, thereby providing a better display effect.
The above and other features and advantages of the present disclosure will become more apparent by describing its exemplary embodiments in detail with reference to the drawings.
Exemplary embodiments will now be described more fully with reference to the drawings. The exemplary embodiments, however, may be implemented in various forms, and should not be construed as been limited to the implementations set forth herein; instead, the implementations are provided such that the present disclosure will be through and complete, and will fully convey the concept of exemplary embodiments to those skilled in the art. In the drawings, shapes and sizes are exaggerated, deformed or simplified for clarity. In the drawings, like reference symbols indicate similar or same structures, and thus their detailed description will be omitted.
In addition, the described features, structures or steps may be combined in one or more embodiments in any suitable ways. In the following description, many detailed details are provided to provide a full understanding of the embodiments of the present disclosure. However, those skilled in the art would realize that the embodiments of the present disclosure may be implemented without one or more of the detailed details, or other methods, steps, structures, and the like may be applied.
Firstly, the present exemplary embodiment provides a display panel, and the display panel may be a liquid crystal display panel or an OLED display panel. In other exemplary embodiments of the present disclosure, the display panel may also be other flat display panel such as a PLED (Polymer Light-Emitting Diode) display panel, a PDP (Plasma Display Panel) display panel. That is, in the present example implementation, the applicable range is not particularly limited.
A display panel of the example implementation of the present disclosure includes a pixel array including crisscrossed sub pixel rows and sub pixel columns. Herein, the sub pixel columns include a plurality of parallel sub pixel columns, and the parallel sub pixel columns at least include a first sub pixel column, a second sub pixel column and a third sub pixel column that are sequentially arranged as illustrated in
In order to realize a hybrid color display, in the present example implementation, the first color is red, the second color is green and the third color is blue. However, those skilled in the art would easily appreciate that in other exemplary embodiments of the present disclosure, the first to third colors may also be other color combinations, which is not limited to those in the present exemplary embodiment.
Referring to
In the column direction, the first color sub pixel has the same sub pixel pitch (central distance) with that of the second color sub pixel. For example, as illustrated in
In the display method of the present exemplary embodiment, the green sub pixel may be used as a brightness center of the pixel unit. When the predetermined offset pitch is 1/2 of sub pixel pitch, the brightness center may be ensured in the central point of the pixel unit. The brightness center is a bright center of the pixel unit, and human eyes have the strongest sensation to the brightness center. It can be used to visually distinguish pixel units, and the resolution of the display panel is usually defined by calculating numbers of the brightness centers. As illustrated in
In the present example implementation, the display panel is also provided thereon with gate lines providing scan signals to each row of sub pixels and data lines providing data signals to each column of sub pixels. In the present example implementation, the n-th sub pixels in the first to three sub pixel columns are connected to a same gate line, wherein n is a positive integer, to match the above shape and arrangement of each sub pixel and subsequent SPR algorithms. In the present example implementation, similar to the prior art, data lines may be provided between adjacent sub pixel columns, and repeated description thereof will be omitted. Furthermore, brightness distribution will be performed subsequently by a sub pixel rendering method, and thus a light shielding matrix between adjacent first color sub pixels in the first sub pixel column may not be required, thereby lowering the requirement on the manufacturing process. According to an exemplary embodiment of the present disclosure, no shielding matrix is provided between adjacent first color sub pixels in the first sub pixel column.
Further, the present example implementation further provides a display device including the above display panel as well as other components in the prior art such as a gate driver, a source driver, and the like. Display brightness of each sub pixel in the above display panel may be determined by sub pixel rendering (SPR) algorithms. In the present exemplary embodiment, the display device may further include a sub pixel rendering module capable of converting a brightness value of each sub pixel in a first virtual pixel array corresponding to an image to be displayed into a brightness value of each sub pixel in the pixel array according to a sub pixel rendering algorithm.
Referring to
In the present exemplary embodiment, the process of correspondingly converting the brightness values of the sub pixels in each first virtual pixel unit into the brightness values of the sub pixels in each second virtual pixel unit may include the following steps:
Continuing referring to
L1=p(x0l0+x1l1+x2l2+x3l3)
wherein l0˜l3 and x0˜x3 respectively are brightness values of the sub pixels in the second virtual pixel units, which respectively correspond to all of the pixel units sharing the sub pixel, having the same color with the sub pixel and brightness ratios contributed by the sub pixels, and p is an adjustment coefficient and p≦1. The adjustment coefficient mainly attenuates the calculated brightness value to avoid overflow of the brightness. Meanwhile, the adjustment coefficient p may also adjust the brightness and saturability of the displayed image.
The second color sub pixel is not shared by other pixel units, and in any one of the pixel unit, the second color sub pixel has a brightness value of L2=q·n. Herein, n is a brightness value of the second color sub pixel in the second virtual pixel unit corresponding to the pixel unit, and q is an adjustment coefficient and q≦1. The adjustment coefficient mainly attenuates the calculated brightness value to avoid overflow of the brightness. Meanwhile, the adjustment coefficient q may also be used to adjust the brightness and contrast ratio of the displayed image.
Continuing referring to
Taking the pixel unit P constituted by A, B, C, D and E in
B=p(X8+Y8+X12+Y12)
The red sub pixel C in the pixel matrix is shared by red sub pixels X1, X5, Y1 and Y5 in the second virtual pixel matrix. Similarly, the brightness value C thereof may be:
C=p(1/2·X1+1/2·X5+1/2·Y1+1/2·Y5)
The red sub pixel D in the pixel matrix is shared by red sub pixels Y1, Y5, Z1 and Z5 in the second virtual pixel matrix. Similarly, the brightness value D thereof may be:
D=p(1/2·Y1+1/2·Y5+1/2·Z1+1/2·Z5)
The blue sub pixel E in the pixel matrix is shared by blue sub pixels Y7, Y11, Z7 and Z11 in the second virtual pixel matrix. Similarly, the brightness value E thereof may be:
E=p(Y7+Y11+Z7+Z11)
The brightness value A of the green sub pixel A in the pixel matrix may be:
A=q·Y6
Herein, both of the adjustment coefficients p and q are equal to or smaller than 1, and may be set according to actual requirement.
Brightness of each sub pixel in other pixel units in the pixel matrix may be calculated and obtained by the above means, and display may be performed by providing corresponding data signals via a source driver, data lines and the like based on the above calculation. Those skilled in the art would easily appreciate that the above ratios and coefficients involved in the above calculation may also be other values, and are not limited to the present exemplary embodiment.
Furthermore, the present exemplary embodiment further provides a display method corresponding to the above display device. Since the detailed implementation of the method has been described in detail in the exemplary embodiments regarding the above display device, repeated description will be omitted herein.
In the display device and the display method according to the present exemplary embodiment, by providing a new RGBW pixel matrix structure, on one hand, the transmittance of the display panel may be effectively increased, thereby reducing power consumption; meanwhile, white sub pixels are arranged in a dispersed manner, thereby bright bars may be prevented from occurring; and such a pixel matrix structure may uniformly distribute brightness of the pixel unit in each direction, thereby improving overall rendering effects and providing a better view angle. On the other hand, the pixel matrix, combining with corresponding sub pixel rendering algorithms, may visually provide a PPI substantially close to a standard RGB display paned; meanwhile, compared with typical standard RGBW pixel matrix, a number of sub pixels may be greatly reduced and correspondingly reducing the wirings such as data lines, an aperture ratio of the display device may be efficiently increased while reducing the cost and lowering process difficulty, thereby providing a better display effect.
The present disclosure has been described by the above relating embodiments; however, the above embodiments are merely examples of the present disclosure. It should note that, the disclosed embodiments do not limit the scope of the present disclosure. Instead, all the changes and modifications without departing the spirit and scope of the present disclosure belong to the patent protection scope of the present disclosure.
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