Method for displaying image and display device

Patent metadata

Field	Value
Publication number	US-10467939-B2
Application number	US-201514769085-A
Country	US
Kind code	B2
Filing date	Jan 8, 2015
Priority date	Sep 26, 2014
Publication date	Nov 5, 2019
Grant date	Nov 5, 2019

Abstract

Embodiments of the invention disclose a method for displaying image and a display device. In the display panel, 2*2 pixels constitute one repeating group, each repeating group contains two pixels composed of a B sub-pixel and a Y sub-pixel and two pixels composed of a R sub-pixel and a G sub-pixel, and sub-pixels included in neighboring pixels in the horizontal or vertical direction within the repeating group are different, thus compared to the existing arrangement in which three or more sub-pixels constitute one pixel, the number of sub-pixels in each pixel is reduced, enabling the resolution of image displayed to be enhanced under the same fabrication precision. And after converting the received RGB image signal of each pixel of the frame to be displayed into corresponding RG/BY image signal respectively, depending on arrangement of sub-pixels in each pixel of the display panel, image signal corresponding to sub-pixels of each pixel in the display panel is determined based on the RG/BY image signal corresponding to each pixel of the frame to be displayed, then the image is displayed, therefore, normal display can be ensured, image of the frame to be displayed can be rendered better.

First claim

The invention claimed is:

1. A method for displaying image, comprising:
converting a RGB image signal of each pixel of a frame to be displayed into a corresponding RGBY image signal respectively; calculating an image signal corresponding to sub-pixels in each pixel of a display panel based on the RGBY image signal corresponding to each pixel of the frame to be displayed and an arrangement of sub-pixels in each pixel of the display panel; wherein in the display panel, 2*2 pixels constitute a repeating group, each repeating group is composed of two first pixels and two second pixels, each first pixel being composed of a B sub-pixel and a Y sub-pixel, each second pixel being composed of a R sub-pixel and a G sub-pixel, wherein neighboring pixels in horizontal and vertical directions in the repeating group have different sub-pixels; transmitting the image signal corresponding to sub-pixels in each pixel of the display panel to the display panel, wherein the step of converting the RGB image signal of each pixel of a frame to be displayed into corresponding RGBY image signal respectively comprises: computing the RGBY image signal by the following formulas: R_O=R, G_O=G, B_O=B, Y_O=min(R, G); wherein R represents a value of an R image signal of each pixel of the frame to be displayed; G represents a value of a G image signal of each pixel of the frame to be displayed; B represents a value of a B image signal of each pixel of the frame to be displayed; R represents a value of a converted R image signal of each pixel, G_O represents a value of a converted G image signal of each pixel, B_O represents a value of a converted B image signal of each pixel, Y_O represents a value of a converted Y image signal of each pixel, and min(R, G) represents a minimum of the value of the R image signal and the value of the G image signal, wherein the two sub-pixels in each pixel of the display panel are arranged in a horizontal direction, the step of calculating image signal corresponding to sub-pixels in each pixel of a display panel based on the RGBY image signal corresponding to each pixel of the frame to be displayed comprises: in the second pixel composed of a R sub-pixel and a G sub-pixel of each repeating group, image signal corresponding to the R sub-pixel equals to corresponding converted R image signal of the pixel in the frame to be displayed, image signal corresponding to the G sub-pixel equals to corresponding converted G image signal of the pixel in the frame to be displayed; in the first pixel composed of a B sub-pixel and a Y sub-pixel of each repeating group, image signal corresponding to the Y sub-pixel equals to corresponding converted Y image signal of the pixel in the frame to be displayed, image signal corresponding to the B sub-pixel equals to a mixing value of corresponding converted B image signal of the pixel in the frame to be displayed and B image signal in the RGB image signal of the original pixel in the frame to be displayed corresponding to a pixel adjacent to the pixel comprising the B sub-pixel in the repeating group.

2. A method for displaying image, comprising:
converting a RGB image signal of each pixel of a frame to be displayed into a corresponding RGBY image signal respectively; calculating an image signal corresponding to sub-pixels in each pixel of a display panel based on the RGBY image signal corresponding to each pixel of the frame to be displayed and an arrangement of sub-pixels in each pixel of the display panel; wherein in the display panel, 2*2 pixels constitute a repeating group, each repeating group is composed of two first pixels and two second pixels, each first pixel being composed of a B sub-pixel and a Y sub-pixel, each second pixel being composed of a R sub-pixel and a G sub-pixel, wherein neighboring pixels in horizontal and vertical directions in the repeating group have different sub-pixels; transmitting the image signal corresponding to sub-pixels in each pixel of the display panel to the display panel, wherein the step of converting the RGB image signal of each pixel of a frame to be displayed into corresponding RGBY image signal respectively comprises: computing the RGBY image signal by the following formulas: R_O=R, G_O=G, B_O=B, Y_O=min(R, G); wherein R represents a value of an R image signal of each pixel of the frame to be displayed; G represents a value of a G image signal of each pixel of the frame to be displayed; B represents a value of a B image signal of each pixel of the frame to be displayed; R_O represents a value of a converted R image signal of each pixel, G_O represents a value of a converted G image signal of each pixel, B_O represents a value of a converted B image signal of each pixel, Y_O represents a value of a converted Y image signal of each pixel, and min(R, G) represents a minimum of the value of the R image signal and the value of the G image signal, wherein the two sub-pixels in each pixel of the display panel are arranged in a diagonal direction, the step of calculating image signal corresponding to sub-pixels in each pixel of a display panel based on the RGBY image signal corresponding to each pixel of the frame to be displayed comprises: in the second pixel composed of a R sub-pixel and a G sub-pixel of each repeating group, image signal corresponding to the G sub-pixel equals to corresponding converted G image signal of the pixel in the frame to be displayed, image signal corresponding to the R sub-pixel equals to a mixing value of corresponding converted R image signal of the pixel in the frame to be displayed and R image signal in the RGB image signal of the original pixel in the frame to be displayed corresponding to a pixel adjacent to the pixel comprising the R sub-pixel in the repeating group; in the first pixel composed of a B sub-pixel and a Y sub-pixel of each repeating group, image signal corresponding to the Y sub-pixel equals to corresponding converted Y image signal of the pixel in the frame to be displayed, image signal corresponding to the B sub-pixel equals to a mixing value of corresponding converted B image signal of the pixel in the frame to be displayed and B image signal in the RGB image signal of the original pixel in the frame to be displayed corresponding to a pixel adjacent to the pixel comprising the B sub-pixel in the repeating group.

3. A display device comprising a display panel and a driving device, wherein in the display panel, 2*2 pixels constitute a repeating group, each repeating group is composed of two first pixels and two second pixels, each first pixel being composed of a B sub-pixel and a Y sub-pixel, each second pixel being composed of a R sub-pixel and a G sub-pixel, wherein neighboring pixels in horizontal and vertical directions in the repeating group have different sub-pixels, the driving device comprises:
a receiver for receiving a RGB image signal of each pixel of a frame to be displayed;
a converter for converting the RGB image signal of each pixel of the frame to be displayed into a corresponding RGBY image signal respectively;
a calculator for calculating an image signal corresponding to sub-pixels in each pixel of the display panel based on the RGBY image signal corresponding to each pixel of the frame to be displayed and an arrangement of sub-pixels in each pixel of the display panel;
a transmitter for transmitting the image signal corresponding to sub-pixels in each pixel of the display panel to the display panel,
wherein the converter is configured to compute the RGBY image signal by the following formulas:
R _ O=R, G _ O=G, B _ O=B, Y _ O =min( R,G );

wherein R represents a value of an R image signal of each pixel of the frame to be displayed; G represents a value of a G image signal of each pixel of the frame to be displayed; B represents a value of a B image signal of each pixel of the frame to be displayed; R_O represents a value of a converted R i

Assignees

• Boe Technology Group Co Ltd

Inventors

• Jin Xiaodan

Classifications

• G09G2340/06

  Colour space transformation · CPC title

• G09G3/20 Primary

  for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} · CPC title

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• H04N1/6008

  with primary colour signals, e.g. RGB or CMY(K) · CPC title

• G09G2300/0452

  Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components · CPC title