Display apparatus

Patent metadata

Field	Value
Publication number	US-2016232829-A1
Application number	US-201615009673-A
Country	US
Kind code	A1
Filing date	Jan 28, 2016
Priority date	Feb 6, 2015
Publication date	Aug 11, 2016
Grant date	—

Abstract

Provided is a display apparatus including a display panel, a timing controller, a gate driver, and a data driver. The display panel includes a plurality of pixels and a plurality of sub-pixels. Two pixels among the pixels include five sub-pixels and temporally share a third sub-pixel among the five sub-pixels. The timing controller includes a filter that is set based on a region having the same area as four sub-pixels. The timing controller generates RGBW data having red, green, blue, and white data based on input data, and applies the filter to the RGBW data to generate output data corresponding to each of the sub-pixels.

First claim

What is claimed is:

1 . A display apparatus, comprising:
a display panel including a plurality of pixels, each of the pixels including a plurality of sub-pixels, wherein two of the pixels include five of the sub-pixels and temporally share one of the five sub-pixels; a timing controller including a filter set based on an area having the same area as four of the sub-pixels, and configured to generate RGBW data having red, green, blue, and white data based on input data and apply the filter to the RGBW data to generate output data corresponding to each of the sub-pixels; a gate driver configured to provide gate signals to the sub-pixels; and a data driver configured to provide data voltages corresponding to the output data to the sub-pixels.

2 . The display apparatus of claim 1 , wherein the sub-pixels are repeatedly arranged in units of a sub-pixel group including 8 sub-pixels arranged in a 2×4 or 4×2 matrix, and the sub-pixel group includes two red sub-pixels, two green sub-pixels, two blue sub-pixels, and two white sub-pixels.

3 . The display apparatus of claim 1 , wherein an aspect ratio of each of the pixels is substantially 1:1.

4 . The display apparatus of claim 1 , wherein an aspect ratio of each of the sub-pixels is substantially 1:2.5.

5 . The display apparatus of claim 1 , wherein sub-pixels arranged in a 2×5 matrix form a square-like shape.

6 . The display apparatus of claim 1 , wherein the timing controller comprises:
a gamma correction unit configured to linearize the input data; a gamut mapping unit configured to map the linearized input data to a red color gamut, a green color gamut, a blue color gamut, and a white color gamut to generate the RGBW data; a saturation data determination unit configured to analyze the RGBW data for each unit pixel data corresponding to each of the pixels to generate a saturation signal having information regarding whether to have saturated color data; a sub-pixel rendering unit configured to perform a rendering operation on the RGBW data to generate rendering data corresponding to each of the sub-pixels; and a reverse gamma correction unit configured to non-linearize the rendering data.

7 . The display apparatus of claim 6 , wherein the filter set comprises:
a re-sampling filter configured to generate sub-pixel rendering data corresponding to a target pixel, based on data corresponding to the target pixel and data corresponding to pixels adjacent to the target pixel among the RGBW data; and a box filter configured to compensate for a dot pattern or diagonal pattern including a red, green, or blue color of the RGBW data.

8 . The display apparatus of claim 7 , wherein the sub-pixel rendering unit comprises:
a meta-sharp filter configured to compensate for distortion by applying the re-sampling filter to the RGBW data; a self-sharpening filter configured to compensate for distortion by applying the re-sampling filter to a horizontal line pattern or vertical line pattern including a red, green, or blue color of the RGBW data; a pattern detection filter including a first input terminal and a second input terminal, and configured to analyze the RGBW data and selectively output any one of data received through the first input terminal and data received through the second input terminal according to whether a dot pattern or diagonal pattern is detected; and a saturated color detection filter including a third input terminal and a fourth input terminal, and configured to analyze the saturation signal and selectively output any one of data received through the third input terminal and data received through the fourth input terminal according to whether a saturated color is detected.

9 . The display apparatus of claim 7 , wherein
first data, which is obtained by adding data obtained by applying the re-sampling filter to the RGBW data and data obtained by applying the self-sharpening filter to the RGBW data, is input to the first input terminal of the pattern detection filter, and second data, which is obtained by applying the box filter to the RGBW data, is input to the second input terminal of the pattern detection filter.

10 . The display apparatus of claim 7 , wherein
third data, which is obtained by adding data obtained by applying the re-sampling filter to the RGBW data and data obtained by applying the meta-sharp filter to the RGBW data, is input to the third input terminal of the saturated color detection filter, and fourth data, which is output from the pattern detection filter, is input to the fourth input terminal of the saturated color detection filter.

11 . The display apparatus of claim 7 , wherein
the re-sampling filter includes first to fifth re-sampling filters, the meta-sharp filter includes first to fifth meta-sharp filters calculated corresponding to the first to fifth re-sampling filters, respectively, the self-sharp filter includes first to fifth self-sharp filters calculated corresponding to the first to fifth re-sampling filters, respectively, and the box filter includes first to fifth box filters.

12 . The display apparatus of claim 11 , wherein
the first re-sampling filter has filter coefficients arranged in the form of a 3×3 matrix, in which a filter coefficient in first row and first column is 0, a filter coefficient in first row and second column is 32, a filter coefficient in first row and third column is 0, a filter coefficient in second row and first column is 32, a filter coefficient in second row and second column is 152, a filter coefficient in second row and third column is 8, a filter coefficient in third row and first column is 0, a filter coefficient in third row and second column is 32, and a filter coefficient in third row and third column is 0, the second re-sampling filter has filter coefficients arranged in the form of a 3×2 matrix, in which a filter coefficient in first row and first column is 16, a filter coefficient in first row and second column is 16, a filter coefficient in second row and first column is 96, a filter coefficient in second row and second column is 96, a filter coefficient in third row and first column is 16, and a filter coefficient in third row and second column is 16, the third re-sampling filter has filter coefficients arranged in the form of a 3×3 matrix, in which a filter coefficient in first row and first column is 0, a filter coefficient in first row and second column is 32, a filter coefficient in first row and third column is 0, a filter coefficient in second row and first column is 8, a filter coefficient in second row and second column is 152, a filter coefficient in second row and third column is 32, a filter coefficient in third row and first column is 0, a filter coefficient in third row and second column is 32, and a filter coefficient in third row and third column is 0, the fourth re-sampling filter has filter coefficients arranged in the form of a 3×2 matrix, in which a filter coefficient in first row and first column is 4, a filter coefficient in first row and second column is 28, a filter coefficient in second row and first column is 64, a filter coefficient in second row and second column is 128, a filter coefficient in third row and first column is 4, and a filter coefficient in third row and second column is 28, and the fifth re-sampling filter has filter coefficients arranged in the form of a 3×2 matrix, in which a filter coefficient in first row and first column is 28, a filter coefficient in first row and second column is 4, a filter coefficient in second row and first column is 128, a filter coefficient in second row and second column is 64, a filter coefficient in third row and first column is 28, an

Assignees

• Samsung Display Co Ltd

Inventors

• Ahn Kuk-Hwan
• Namkung Hyunkyu
• Kim Heendol
• Son Seokyun
• Koh Jai-Hyun
• Lee Iksoo

Classifications

• 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

• G09G2300/0452

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

• G09G3/3648

  using an active matrix (G09G3/367 - G09G3/3696 take precedence) · CPC title

• G09G2300/0439

  Pixel structures · CPC title

• G09G2300/043

  Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver · CPC title