DISPLAY DEVICE AND DRIVING METHOD THEREOF

• US 20160125781A1
• Filed: 10/13/2015
• Published: 05/05/2016
• Est. Priority Date: 11/05/2014
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: YANG, Ji-Yeon
• Application Number:
  US14/882,443
• Publication Number:
  US 20160125781A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G09G 2300/0452 Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2340/0457 Improvement of perceived resolution by subpixel rendering
• CPC Class Codes: G09G 3/20 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 Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: G09G 3/2044 using dithering
• CPC Class Codes: G09G 3/2074 using sub-pixels

Abstract

Disclosed is a display device, including: a pixel unit including a first pixel column, in which first color pixels and second color pixels are alternately arranged, a second pixel column, in which the first color pixels and the second color pixels are alternately arranged in a reverse order to that of the first pixel column, and a third pixel column, in which third color pixels are arranged, disposed between the first pixel column and the second pixel column; a data driver generating data signals, and supplying the generated data signals to the pixel unit; and a gamma adjustor detecting a specific pattern based on the input data, adjusting at least one of gamma values when the specific pattern is detected, and outputting the adjusted gamma value to the data driver.

Claims

1. A display device, comprising:

a pixel unit including a first pixel column, in which first color pixels and second color pixels are alternately arranged, a second pixel column, in which the first color pixels and the second color pixels are alternately arranged in a reverse order to that of the first pixel column, and a third pixel column, in which third color pixels are arranged, disposed between the first pixel column and the second pixel column;

a data driver configured to generate a first color data signal, a second color data signal, and a third color data signal in response to input data, and supply the generated data signals to the pixel unit; and

a gamma adjustor configured to detect a specific pattern based on the input data, adjust at least one of a first color gamma value and a second color gamma value when the specific pattern detected, and output the adjusted gamma value to the data driver.

2. The display device of claim 1, wherein the gamma adjustor adjusts at least one of the first color gamma value and the second color gamma value so as to increase luminance when the specific pattern is detected.

3. The display device of claim 1, wherein the gamma adjustor adjusts the first color gamma value and the second color gamma value in accordance with a reference gamma value and outputs the adjusted first color and second color gamma values when the specific pattern is not detected.

4. The display device of claim 1, wherein the gamma adjustor includes:

a pattern comparison unit configured to compare the input data with a reference pattern value, and output a result of the comparison; and

a gamma value setting unit configured to set the first color gamma value and the second color gamma value based on the result of the comparison, and supply the set first color gamma value and second color gamma value to the data driver.

5. The display device of claim 1, wherein the gamma adjustor further outputs a predetermined third color gamma value to the data driver.

6. The display device of claim 1, wherein the data driver includes:

an input gamma unit configured to gamma convert at least one of first color input data and second color input data among the input data by applying the first color gamma value and the second color gamma value from the gamma adjustor, and output the gamma converted first color input data and second color input data;

a sub pixel rendering unit configured to render an output value of the input gamma unit in accordance with a pixel arrangement structure of the pixel unit and output the rendered output value;

an output gamma unit configured to inversely gamma convert an output value of the sub pixel rendering unit and output the inversely gamma converted output value; and

a dithering unit configured to dither an output value of the output gamma unit and output the dithered output value.

7. The display device of claim 6, wherein the data driver at least dithers third color input data among the input data.

8. A method of driving a display device, which comprises a pixel unit including a first pixel column, in which first color pixels and second color pixels are alternately arranged, a second pixel column, in which the first color pixels and the second color pixels are alternately arranged in a reverse order to that of the first pixel column, and a third pixel column, in which third color pixels are arranged, disposed between the first pixel column and the second pixel column, the method comprising:

comparing input data with a reference pattern value, and setting at least one of a first color gamma value and a second color gamma value in response to a result of the comparison;

detecting a specific pattern according to the result of the comparison between the input data and the reference pattern value;

adjusting at least one of the first color gamma value and the second color gamma value;

generating a first color data signal and a second color data signal corresponding to the input data by applying the first color gamma value and the second color gamma value, and a third color data signal corresponding to the input data; and

driving pixels at luminance corresponding to the first color data signal, the second color data signal and the third color data signal.

9. The method of claim 8, wherein when the specific pattern is detected, at least one gamma value between the first color gamma value and the second color gamma value is adjusted so as to increase luminance.

10. The method of claim 8, wherein when the specific pattern is not detected, the first color gamma value and the second color gamma value are set in accordance with a reference gamma value.

11. The method of claim 8, wherein the generating of the first color data signal, the second color signal and the third color data signal includes sub pixel rendering of rendering the input data or gamma converted input data in accordance with a pixel arrangement structure of the display unit.

12. A display device, comprising:

a pixel unit in which the number of each first color pixels and a second color pixels is set to be a half of the number of third color pixels;

a gamma adjustor adjusting and outputting at least one of a first color gamma value and a second color gamma value when input data corresponding to a predetermined specific pattern is supplied; and

a data driver generating at least one of a first color data signal and a second color data signal by applying at least one of the adjusted gamma values supplied from the gamma adjustor.

13. The display device of claim 12, wherein the gamma adjustor outputs the first color gamma value and the second color gamma value in accordance with the reference gamma value when the predetermined specific pattern is not detected.

14. The display device of claim 13, wherein the gamma adjustor outputs the reference gamma value as a gamma value of the third color pixels regardless of the predetermined specific pattern.

15. The display device of claim 12, wherein the gamma adjustor includes:

a pattern comparison unit configured to compare the input data with a reference pattern value, and to output a result of the comparison; and

a gamma value setting unit configured to set the first color gamma value and the second color gamma value based on the result of the comparison, and to supply the set first color gamma value and second color gamma value to the data driver.