Systems and methods for reducing loss of transmittance due to column inversion

Patent metadata

Field	Value
Publication number	US-9245487-B2
Application number	US-201213420234-A
Country	US
Kind code	B2
Filing date	Mar 14, 2012
Priority date	Mar 14, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

Systems, methods, and devices for reducing the loss of transmittance caused by column inversion. To provide one example, an electronic display may include a display panel with columns of pixels and driver circuitry to drive the pixels using column inversion. Adjacent columns that are driven at like polarity are spaced more closely than adjacent columns driven at opposite polarities.

First claim

What is claimed is:

1. An electronic display comprising:
a display panel comprising columns of pixels, each of the columns of pixels comprising one pixel per row in the column; and
driver circuitry configured to drive the pixels using 2/1-column inversion or 4/2-column inversion or a combination thereof;
wherein adjacent columns driven at like polarity are spaced more closely than adjacent columns driven at opposite polarity;
wherein 2/1-column inversion comprises a repeating pattern in which a first column is driven at a first polarity, a second column adjacent to the first column is driven at the first polarity, a third column adjacent to the second column is driven at a second polarity, a fourth column adjacent to the third column is driven at the first polarity, a fifth column adjacent to the fourth column is driven at the first polarity, and a sixth column adjacent to the fifth column is driven at the second polarity; and
wherein 4/2-column inversion comprises a repeating pattern in which the first column is driven at the first polarity, the second column adjacent to the first column is driven at the first polarity, the third column adjacent to the second column is driven at the first polarity, the fourth column adjacent to the third column is driven at the first polarity, the fifth column adjacent to the fourth column is driven at the second polarity, and the sixth column adjacent to the fifth column is driven at the second polarity.

2. The electronic display of claim 1 , wherein the driver circuitry is configured to drive the pixels using 2/1-column inversion, wherein one of every three columns is spaced equally close to both adjacent columns and each of the other two of every three columns is spaced more closely to one adjacent column than the other.

3. The electronic display of claim 2 , wherein the one of every three columns is spaced a first distance from both adjacent columns, and wherein each of the other two of every three columns is spaced the first distance to one adjacent column and a second distance to the other adjacent column, wherein the first distance is greater than the second distance.

4. The electronic display of claim 1 , wherein the driver circuitry is configured to drive the pixels using 4/2-column inversion, wherein each of four of every six columns is spaced more closely to one adjacent column than the other, and wherein each of the other two of every six columns is spaced equally close to both adjacent columns.

5. The electronic display of claim 4 , wherein the other two of every six columns are adjacent to one another and are associated with color filters of the same color.

6. The electronic display of claim 4 , wherein each of the four of every six columns is spaced a first distance from the one adjacent column and a second distance from the other adjacent column, wherein each of the other two of every six columns is spaced the first distance from both adjacent columns, wherein the first distance is less than the second distance.

7. An electronic display comprising:
a display panel comprising columns of pixels, each of the columns of pixels comprising one pixel per row in the column; and
driver circuitry configured to drive the pixels using 2/1-column inversion or 4/2-column inversion, or both;
wherein adjacent columns driven at like polarity are spaced more closely than adjacent columns driven at opposite polarity;
wherein each of the columns of pixels is disposed in a zig-zag pattern on the display in which two adjacent rows have different pixel spacings, wherein the driver circuitry is configured to drive the pixels using Z-inversion;
wherein 2/1-column inversion comprises a repeating pattern in which a first column is driven at a first polarity, a second column adjacent to the first column is driven at the first polarity, a third column adjacent to the second column is driven at a second polarity, a fourth column adjacent to the third column is driven at the first polarity, a fifth column adjacent to the fourth column is driven at the first polarity, and a sixth column adjacent to the fifth column is driven at the second polarity; and
wherein 4/2-column inversion comprises a repeating pattern in which the first column is driven at the first polarity, the second column adjacent to the first column is driven at the first polarity, the third column adjacent to the second column is driven at the first polarity, the fourth column adjacent to the third column is driven at the first polarity, the fifth column adjacent to the fourth column is driven at the second polarity, and the sixth column adjacent to the fifth column is driven at the second polarity.

8. The electronic display of claim 7 , wherein every other row of columns of pixels has the same column spacing pattern.

9. A method of driving a display panel having columns of pixels spaced either a first distance or a second distance apart from one another, the method comprising:
displaying a first frame of image data on the display panel at least in part by:
driving a first column of pixels of the display panel at a first polarity;
driving a second column of pixels adjacent to the first column at the first polarity;
driving a third column of pixels adjacent to the second column at the first polarity; and
driving a fourth column of pixels adjacent to the first column:
at the first polarity when the fourth column is spaced the first distance from the first column; or
at a second polarity opposite the first polarity when the fourth column is spaced the second distance from the first column; and

driving a fifth column of pixels adjacent to the third column:
at the first polarity when the fifth column is spaced the first distance from the third column; or
at the second polarity when the fifth column is spaced the second distance from the third column.

10. The method of claim 9 , wherein the first distance is less than the second distance.

11. The method of claim 9 , wherein the fifth column and the third column are spaced farther apart than the first column and the second column and wherein the fifth column and the third column are driven at opposite polarities.

12. The method of claim 9 , comprising displaying a second frame of image data immediately subsequent to the first frame of image data at least in part by:
driving the first column, the second column, and the third column at the second polarity; and
driving the fourth column:
at the second polarity when the fourth column is spaced the first distance from the first column; or
at the first polarity when the fourth column is spaced the second distance from the first column.

13. An electronic device comprising:
a processor configured to generate image data; and
a display configured to display the image data by driving pixels of the display according to a 2/1-column inversion scheme or a 4/2-column inversion scheme or a combination thereof, wherein adjacent columns of pixels driven at the same polarity are spaced more closely than adjacent columns of pixels driven at opposite polarities;
wherein 2/1-column inversion comprises a repeating pattern in which a first column is driven at a first polarity, a second column adjacent to the first column is driven at the first polarity, a third column adjacent to the second column is driven at a second polarity, a fourth column adjacent to the third column is driven at the first polarity, a fifth column adjacent to the fourth column is driven at the first polarity, and a sixth column adjacent to the fifth column is driven at the second polarity;
wherein 4/2-column inversion comprises a repeating pattern in which the first column is driven at the first polar

Assignees

• Ge Zhibing
• Chang Shih Chang
• Chen Cheng
• Bae Hopil
• Xu Ming
• Gettemy Shawn Robert
• Yao Wei H
• Apple Inc

Inventors

• Ge Zhibing
• Chang Shih Chang
• Chen Cheng
• Bae Hopil
• Xu Ming
• Gettemy Shawn Robert
• Yao Wei H

Classifications

• G09G2300/0439

  Pixel structures · CPC title

• G09G2360/145

  the light originating from the display screen · CPC title

• G09G3/3233

  with pixel circuitry controlling the current through the light-emitting element · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title