Data processing device and display system including the same

Patent metadata

Field	Value
Publication number	US-9792877-B2
Application number	US-201414250830-A
Country	US
Kind code	B2
Filing date	Apr 11, 2014
Priority date	Apr 12, 2013
Publication date	Oct 17, 2017
Grant date	Oct 17, 2017

Abstract

A data processing device, which processes and provides data to a plurality of logical pixels of a display device, includes: a data analysis part which analyzes information of text, color, line or edge in each of the data; and a data compensation part which compensates text data corresponding to a logical pixel which does not express text color among the data having the information of text based on the information analyzed in the data analysis part, where each of the logical pixels of the display device comprises at least one of red, green, blue and optional color sub-pixels.

First claim

What is claimed is:

1. A data processing device, which processes and provides data to a plurality of logical pixels of a display device, comprising:
a data analysis part which analyzes information of text, color, line or edge in each of the data and comprises:
a histogram analysis part which analyzes the data corresponding to a first logical pixel block, which is defined by at least a portion of the logical pixels, to determine a color of text and background of an image to be displayed in the first logical pixel block;
a text judgment part which analyzes the data corresponding to a second logical pixel block as a unit of analysis to detect whether or not the data corresponding to the second logical pixel block include the information of text, and outputs a first text signal when the data corresponding to the second logical pixel block include information of text;
a line/edge detection part which receives the first text signal and analyzes the data corresponding to the second logical pixel block as the unit for analysis to detect whether or not the data corresponding to the second logical pixel block corresponds to a line or an edge; and
a color analysis part which receives the first text signal and detects colors of the data corresponding to the first logical pixel block; and
a data compensation part which compensates text data corresponding to a logical pixel which is unable to represent a text color among the data having the information of text based on the information analyzed in the data analysis part,
wherein each of the logical pixels of the display device comprises only parts of red, green and blue sub-pixels and an optional color sub-pixel.

2. The data processing device of claim 1 , wherein
the number of the logical pixels which defines the second logical pixel block is less than the number of the logical pixels which defines the first logical pixel block.

3. The data processing device of claim 2 , wherein
the first logical pixel block comprises 10,000 logical pixels, which are adjacent to one another.

4. The data processing device of claim 2 , wherein
the second logical pixel block comprises 3 by 3 logical pixels.

5. The data processing device of claim 1 , wherein
each of the text judgment part, the line/edge detection part and the color analysis part scans an entire of the data corresponding to the first logical pixel block by moving the second logical pixel block by a logical pixel row unit or a logical pixel column unit.

6. The data processing device of claim 1 , wherein
the histogram analysis part analyzes a distribution of grayscale of each of red, green and blue data of the data corresponding to the first logical pixel block, and
when two or more of the red, green and blue data have a grayscale value greater than a first predetermined value, the histogram analysis part detects a color having the smallest volume of distribution among colors of the of the red, green and blue data as the text color and detects a remaining color of the colors of the of the red, green and blue data as a background color.

7. The data processing device of claim 1 , wherein
the text judgment part compares a maximum grayscale value of the red, green and blue data of the data corresponding to the second logical pixel block with a second predetermined value to detect whether the information of text exists in the data corresponding to the second logical pixel block or not.

8. The data processing device of claim 7 , wherein
the text judgment part determines that at least a portion of the data corresponding to the second logical pixel block have the information of text when the maximum grayscale value is greater than the second predetermined value, and
the text judgment part determines that the data corresponding to the second logical pixel block do not have the information of text when the maximum grayscale value is less than the second predetermined value.

9. The data processing device of claim 1 , wherein
the second logical pixel block comprises a reference logical pixel and adjacent logical pixels surrounding the reference logical pixel, and
the line/edge detection part detects data corresponding to the reference logical pixel as one of a line, an edge and a remainder with respect to each of red, green and blue colors.

10. The data processing device of claim 9 , wherein
the line/edge detection part detects grayscale differences between the data corresponding to the reference logical pixel and data corresponding to the adjacent logical pixels, respectively,
the line/edge detection part detects a number of a gray scale difference greater than a third predetermined value among the detected grayscale differences, and
the line/edge detection part detects the data corresponding to the reference logical pixel as any one of the line, the edge and the remainder based on the detected number.

11. The data processing device of claim 10 , wherein
the second logical pixel block comprises 3×3 logical pixels,
the line/edge detection part determines the reference data as an edge when the detected number of the grayscale difference greater than the third predetermined value, which is denoted by N, satisfies the following in equation: 0≦N≦3,
the line/edge detection part determines the reference data as a line when the detected number of the grayscale difference greater than the third predetermined value satisfies the following in equation: 3≦N≦8, and
the line/edge detection part determines the reference data as the remainder when the detected number of the grayscale difference greater than the third predetermined value is zero.

12. The data processing device of claim 1 , wherein
the second logical pixel block comprises a reference logical pixel and adjacent logical pixels surrounding the reference logical pixel, and
the color analysis part generates an analysis signal of data corresponding to the reference logical pixel for each of the red, green and blue data, and provides the analysis data to the data compensation part.

13. The data processing device of claim 12 , wherein
the analysis signal comprises an analysis signal of a reference color and an analysis signal of remaining colors different from the reference color.

14. The data processing device of claim 13 , wherein
each of the analysis signal of the reference color and the analysis signal of the remaining colors is one of a top signal, a bottom signal, a high signal and a low signal,
the top signal is generated when data of the reference color exists in data corresponding to the reference logical pixel and data of the reference color does not exist in data corresponding to the adjacent logical pixels,
the bottom signal is generated when data of the reference color does not exist in data corresponding to the reference logical pixel and data of the reference color exists in the data corresponding to the adjacent logical pixels,
the high signal is generated when data of the reference color exists in data corresponding to the reference logical pixel and the data corresponding to the adjacent logical pixels, and
the low signal is generated when data of the reference color does not exist in data corresponding to the reference logical pixel and the data corresponding to the adjacent logical pixels.

15. The data processing device of claim 1 , wherein
the data compensation part compensates at least one of an edge and a line of the text data.

16. The data processing device of claim 15 , wherein
the data compensation part compensates the edge and the line of the text data based on different grayscale values from each other.

Assignees

• Samsung Display Co Ltd
• Samsung Display Co Ltd

Inventors

• Park Sungjae
• Koh Jai-Hyun
• Kwon Se Ah
• Son Seokyun
• Lee Ik Soo

Classifications

• G09G2340/06

  Colour space transformation · CPC title

• G09G3/2003 Primary

  Display of colours (specific for liquid crystal displays G09G3/3607) · CPC title

• G06T7/90

  Determination of colour characteristics · CPC title

• G09G5/02 Primary

  characterised by the way in which colour is displayed {(details of colour display specific for CRTs G09G1/28; specific for flat matrix panels other than liquid crystal displays G09G3/2003; specific for liquid crystal displays G09G3/3607)} · CPC title

• G09G5/20

  Function-generator circuits, e.g. circle generators {line or curve smoothing circuits} · CPC title