DISPLAY APPARATUS AND METHOD OF DRIVING THE SAME

• US 20160014401A1
• Filed: 01/23/2015
• Published: 01/14/2016
• Est. Priority Date: 07/10/2014
• Status: Abandoned Application

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: SON, Seokyun, KOH, Jai-Hyun, KWON, Se Ah, KIM, Jinpil, KIM, Heendol, AHN, Kuk-Hwan, LEE, IK SOO
• Application Number:
  US14/603,535
• Publication Number:
  US 20160014401A1
• 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 2320/0666 for control of colour parameters, e.g. colour temperature
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2340/06 Colour space transformation
• CPC Class Codes: G09G 3/003 to produce spatial visual effects
• CPC Class Codes: G09G 3/2003 Display of colours specific for liquid crystal displays G09G3/3607
• CPC Class Codes: H04N 13/324 Colour aspects
• CPC Class Codes: H04N 13/356 having separate monoscopic and stereoscopic modes

Abstract

A display apparatus includes first pixels, second pixels, a gate driver, and a data driver. The first pixels receive data voltages in response to gate signals. The second pixels are alternately arranged with the first pixels in row and column directions and receive the data voltages in response to the gate signal. The gate and data drivers provide the gate and data signals, respectively, to the first and second pixels. Dual-gate signals each including two sub-gate signals having a same phase as each other are sequentially applied to the first and second pixels in the unit of two rows of odd-numbered rows and in the unit of two rows of even-numbered rows as the gate signals in a three-dimensional mode.

Claims

1. A display apparatus comprising:

first pixels configured to receive data voltages in response to gate signals;

second pixels alternately arranged with the first pixels in a row direction and a column direction, the second pixels being configured to receive the data voltages in response to the gate signals;

a gate driver configured to provide the gate signals to the first and second pixels; and

a data driver configured to provide the data voltages to the first and second pixels,

wherein each of the first pixels comprises sub-pixels different from sub-pixels of each of the second pixels,

wherein the gate signals are sequentially applied to the first and second pixels in a unit of row in a two-dimensional (2D) mode,

wherein dual-gate signals each including two sub-gate signals having a same phase as each other are sequentially applied to the first and second pixels in a unit of two rows of odd-numbered rows and in a unit of two rows of even-numbered rows as the gate signals in a three-dimensional (3D) mode.

2. The display apparatus of claim 1, wherein the gate signals are applied to the first and second pixels each frame during the 2D mode, and

wherein the frame comprises a first sub-frame in which a left-eye image is displayed and a second sub-frame in which a right-eye image is displayed, and the double-gate signals are applied to the first and second pixels each sub-frame during the 3D mode.

3. The display apparatus of claim 1, wherein each of the first pixels comprises a red sub-pixel and a green sub-pixel, and each of the second pixels comprises a blue sub-pixel and a white sub-pixel.

4. The display apparatus of claim 1, further comprising a timing controller configured to render input image data to correspond to the sub-pixels, to convert a data format of the rendered image data, and to apply the image data having the converted data format to the data driver,

wherein the data driver outputs the data voltages corresponding to the image data having the converted data format.

5. The display apparatus of claim 4, wherein the input image data comprise red, green, and blue image data, and the timing controller comprises:

a gamma compensating part configured to linearize the red, green, and blue image data;

a mapping part configured to map the linearized red, green, and blue image data to red, green, blue, and white image data;

a sub-pixel rendering part configured to render the mapped red, green, blue, and white image data, and to output the rendered red, green, blue, and white image data corresponding to the sub-pixels; and

a reverse-gamma compensating part configured to perform reverse-gamma compensation on the rendered red, green, blue, and white image data.

6. The display apparatus of claim 5, wherein the sub-pixel rendering part comprises at least one of a first rendering filter, a second rendering filter, or a third rendering filter,

wherein the first rendering filter is used to render the mapped red, green, blue, and white image data to correspond to the sub-pixels during the 2D mode,

wherein the second rendering filter is used to render the mapped red, green, blue, and white image data to correspond to sub-pixels arranged in the odd-numbered rows, among the sub-pixels, during the 3D mode,

wherein the third rendering filter is used to render the mapped red, green, blue, and white image data to correspond to sub-pixels arranged in the even-numbered rows, among the sub-pixels, during the 3D mode.

7. The display apparatus of claim 6, wherein the first rendering filter comprises first sub-filters arranged in first to third rows and first to third columns,

wherein the first sub-filters have corresponding scale coefficients, respectively,

wherein the sub-pixel rendering part is configured to set first and second pixels, among the first and second pixels, arranged in the first to third rows and the first to third columns to correspond to the first sub-filters, to set a first or second pixel arranged in the second row and the second column among the set first and second pixels as a reference pixel, to multiply first image data corresponding to a color of a sub-pixel of the reference pixel, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by corresponding scale coefficients of the first sub-filters corresponding to the first image data, respectively, and to calculate a sum of the multiplied values as a rendered image data corresponding to the sub-pixel of the reference pixel.

8. The display apparatus of claim 7, wherein a sum of the scale coefficients of the first sub-filters is about 1, a scale coefficient of the first sub-filter arranged in the second row and the second column is about 0.5, a scale coefficient of each of the first sub-filters respectively arranged in the first row and the second column, the second row and the first column, the second row and the third column, and the third row and the second column is about 0.125, and a scale coefficient of each of the first sub-filters respectively arranged in the first row and the first column, the first row and the third column, the third row and the first column, and the third row and the third column is 0.

9. The display apparatus of claim 6, wherein the second rendering filter comprises second sub-filters arranged in first to third rows and first to third columns,

wherein the second sub-filters have corresponding scale coefficients, respectively,

wherein the sub-pixel rendering part is configured to set first and second pixels, among the first and second pixels, arranged in the first to third rows and the first to third columns to correspond to the second sub-filters, to set one first or second pixel arranged in the first row and the second column among the set first and second pixels as a first reference pixel, to set another first or second pixel arranged in the third row and the second column among the set first and second pixels as a second reference pixel, to multiply first image data corresponding to a first color of sub-pixels of the first and second reference pixels, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by corresponding scale coefficients of the second sub-filters corresponding to the first image data, respectively, and to calculate a sum of the multiplied values as rendered image data corresponding to the sub-pixels of the first and second reference pixels, and

wherein the first and third rows among the first to third rows correspond to the two rows of the odd-numbered rows to which one of the double-gate signals is applied.

10. The display apparatus of claim 6, wherein the third rendering filter comprises third sub-filters arranged in first to third rows and first to third columns

wherein the third sub-filters have corresponding scale coefficients, respectively,

wherein the sub-pixel rendering part is configured to set first and second pixels, among the first and second pixels, arranged in the first to third rows and the first to third columns to correspond to the third sub-filters, to set one first or second pixel arranged in the first row and the second column among the set first and second pixels as a first reference pixel, to set another first or second pixel arranged in the third row and the second column among the set first and second pixels as a second reference pixel, to multiply first image data corresponding to a first color of sub-pixels of the first and second reference pixels, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by the corresponding scale coefficients of the third sub-filters corresponding to the first image data, respectively, and to calculate a sum of the multiplied values as rendered image data corresponding to the sub-pixels of the first and second reference pixels, and

wherein the first and third rows among the first to third rows correspond to the two rows of the even-numbered rows to which one of the double-gate signals is applied.

11. A method of driving a display apparatus, wherein the display apparatus comprises first pixels configured to receive data voltages in response to gate signals and second pixels alternately arranged with the first pixels in a row direction and a column direction, and the second pixels being configured to receive the data voltages in response to the gate signals and each of the second pixels including sub-pixels different from sub-pixels of each of the first pixels, comprising:

rendering input image data to image data corresponding to the sub-pixels;

applying the gate signals to the first and second pixels; and

applying the data voltages corresponding to the rendered image data to the first and second pixels,

wherein the gate signals are sequentially applied to the first and second pixels in a unit of row in a two-dimensional (2D) mode,

wherein dual-gate signals each including two sub-gate signals having a same phase as each other are sequentially applied to the first and second pixels in a unit of two rows of odd-numbered rows and in a unit of two rows of even-numbered rows as the gate signals in a three-dimensional mode (3D).

12. The method of claim 11, wherein the gate signals are applied to the first and second pixels each frame during the 2D mode, and

wherein the frame comprises a first sub-frame in which a left-eye image is displayed and a second sub-frame in which a right-eye image is displayed, and the double-gate signals are applied to the first and second pixels each sub-frame during the 3D mode.

13. The method of claim 11, wherein each of the first pixels comprises a red sub-pixel and a green sub-pixel, and each of the second pixels comprises a blue sub-pixel and a white sub-pixel.

14. The method of claim 13, wherein the input image data comprise red, green, and blue image data, and the rendering of the input image data comprises:

linearizing the red, green, and blue image data;

mapping the linearized red, green, and blue image data to red, green, blue, and white image data;

rendering the mapped red, green, blue, and white image data to correspond to the sub-pixels; and

performing a reverse-gamma compensation on the rendered red, green, blue, and white image data.

15. The method of claim 14, wherein the rendering of the mapped red, green, blue, and white image data in the 2D mode comprises:

setting first and second pixels arranged in first to third rows and first to third columns to correspond to first sub-filters arranged in the first to third rows and the first to third columns of a first rendering filter;

setting a first or second pixel arranged in the second row and the second column among the set first and second pixels as a reference pixel;

multiplying first image data corresponding to a color of a sub-pixel of the reference pixel, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by scale coefficients of the first sub-filters corresponding to the first image data, respectively; and

calculating a sum of the multiplied values as a rendered image data corresponding to the sub-pixel of the reference pixel.

16. The method of claim 14, wherein the rendering of the mapped red, green, blue, and white image data in the 3D mode comprises:

setting first and second pixels arranged in the first to third rows and the first to third columns to correspond to second sub-filters arranged in the first to third rows and the first to third columns of a second rendering filter;

setting one first or second pixel arranged in the first row and the second column among the set first and second pixels as a first reference pixel;

setting another first or second pixel arranged in the third row and the second column among the set first and second pixels as a second reference pixel;

multiplying first image data corresponding to a first color of sub-pixels of the first and second reference pixels, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by scale coefficients of the second sub-filters corresponding to the first image data, respectively; and

calculating a sum of the multiplied values as rendered image data corresponding to the sub-pixels of the first and second reference pixels,

wherein the first and third rows among the first to third rows correspond to the two rows of the odd-numbered rows to which one of the double-gate signals is applied.

17. The method of claim 14, wherein the rendering of the mapped red, green, blue, and white image data in the 3D mode comprises:

setting first and second pixels arranged in the first to third rows and the first to third columns to correspond to third sub-filters arranged in the first to third rows and the first to third columns of a third rendering filter;

setting one first or second pixel arranged in the first row and the second column among the set first and second pixels as a first reference pixel;

setting another first or second pixel arranged in the third row and the second column among the set first and second pixels as a second reference pixel;

multiplying first image data corresponding to a first color of sub-pixels of the first and second reference pixels, among the mapped red, green, blue, and white image data corresponding to the set first and second pixels, by scale coefficients of the third sub-filters corresponding to the first image data, respectively;

calculating a sum of the multiplied values as rendered image data corresponding to the sub-pixels of the first and second reference pixels,

wherein the first and third rows among the first to third rows correspond to the two rows of the even-numbered rows to which one of the double-gate signals is applied.

18. A display apparatus comprising:

first pixels configured to receive data voltages in response to gate signals;

second pixels alternately arranged with the first pixels in a row direction and a column direction, the second pixels being configured to receive the data voltages in response to the gate signals;

a gate driver configured to provide the gate signals to the first and second pixels;

a data driver configured to provide the data voltages to the first and second pixels; and

a timing controller configured to render input image data to image data corresponding to the sub-pixels,

wherein the time controller comprises;

a gamma compensating part configured to linearize input red, green, and blue image data;

a mapping part configured to map the linearized red, green, and blue image data to red, green, blue, and white image data; and

a sub-pixel rendering part configured to render the mapped red, green, blue, and white image data, and to output the rendered red, green, blue, and white image data corresponding to the sub-pixels, the sub-pixel rendering part including a first rendering filter and a second rendering filter having a different scale coefficient from that of the first rendering filter.

19. The display apparatus of claim 18, wherein the first rendering filter is used to render the mapped red, green, blue, and white image data to correspond to sub-pixels arranged in the odd-numbered rows, among the sub-pixels, during the 3D mode, and

wherein the second rendering filter is used to render the mapped red, green, blue, and white image data to correspond to sub-pixels arranged in the even-numbered rows, among the sub-pixels, during the 3D mode.

20. The display apparatus of claim 18, wherein each of the first pixels comprises a red sub-pixel and a green sub-pixel, and each of the second pixels comprises a blue sub-pixel and a white sub-pixel.