Liquid crystal display backplane layouts and addressing for non-standard subpixel arrangements

• US 8,144,094 B2
• Filed: 06/26/2008
• Issued: 03/27/2012
• Est. Priority Date: 06/06/2003
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Schlegel, Matthew Osborne, Han, Seok Jin, Brown Elliott, Candice Hellen, Credelle, Thomas Lloyd
• Primary Examiner(s): Wang, Quan-Zhen
• Assistant Examiner(s): Chow, Yuk
• Application Number:
  US12/147,286
• Publication Number:
  US 20080252581A1
• Time in Patent Office: 1,370 Days
• Field of Search: 345/88, 345/89, 345/96, 345/694, 349/88, 349/139
• US Class Current: 345/88
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• 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 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3614 Control of polarity reversal in general
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

Liquid crystal display backplane layouts and addressing for non-standard subpixel arrangements are disclosed. A liquid crystal display comprises a panel and a plurality of transistors. The panel substantially comprises a subpixel repeating group having an even number of subpixels in a first direction. Each thin film transistor connects one subpixel to a row and a column line at an intersection in one of a group of quadrants. The group comprises a first quadrant, a second quadrant, a third quadrant and a fourth quadrant, wherein the thin film transistors are formed in a backplane structure adjacent to intersections of the row and column lines. The thin film transistors are also substantially formed in more than one quadrant in the backplane structure.

Claims

1. A liquid crystal display comprising:

a display panel substantially comprising a plurality of a subpixel repeating group;

the subpixel repeating group comprises at least two rows, each of said rows further comprising an even number of subpixels;

wherein each row of subpixels comprises at least two same-colored subpixels;

each said subpixel having an associated thin film transistor (TFT) connected to a row line and a column line;

said thin film transistor being formed in a corner of said subpixel in one of a group of quadrants with respect to said subpixel, the group comprising a first quadrant, a second quadrant, a third quadrant and a fourth quadrant;

driver circuitry configured to send image signals and polarity signals to said subpixels; and

wherein said display panel is partitioned into a plurality of sections along a row direction wherein said subpixels in each at a first section have their associated TFTs in a first quadrant and said subpixels in a second section have their TFTs in a second quadrant such that the polarity signal sent to same colored subpixels in said first section are different from polarity signals sent to same colored subpixels in said second section.

2. The liquid crystal display of claim 1 wherein said polarity signal comprises a 1×

1 dot inversion polarity signal.

3. The liquid crystal display of claim 1 wherein said polarity signal comprises a 1×

2 dot inversion polarity signal.

4. The liquid crystal display of claim 1 wherein the partitioning of said display panel occurs with frequency across said row direction such that parasitic capacitance effects are substantially abated.

5. The liquid crystal display of claim 1, wherein said subpixels in said first section are connected to an odd-numbered column line, and said subpixels in said second section are connected to an even-numbered column line.

6. The liquid crystal display of claim 1, wherein said subpixels in said first section are connected to an even-numbered column line, and said subpixels in said second section are connected to an odd-numbered column line.

7. The liquid crystal display of claim 1, wherein said subpixel repeating group comprises a first subpixel having a first color, a second subpixel having a second color different from the first color, a third color subpixel having a third color different from the first and second colors and a fourth subpixel having the third color in each of said rows.

8. The liquid crystal display of claim 7, wherein the first color is red, the second color is green and the third color is blue.

9. The liquid crystal display of claim 7, wherein the third subpixel has a size smaller than each of the first subpixel and the second subpixel, and the fourth subpixel has a size substantially the same as the third subpixel.

10. The liquid crystal display of claim 7, wherein the first subpixel in a first row and the second subpixel in a second row are disposed in a same column.

11. The liquid crystal display of claim 10, wherein the third subpixel in a first row and the third subpixel in a second row are disposed in a same column.

12. The liquid crystal display of claim 11, wherein the third subpixel of the first row is disposed between the first and second subpixels, and the second subpixel of the first row is disposed between the third and fourth subpixels.

13. The liquid crystal display of claim 12, wherein the first and second subpixels of the first row are connected to a first row line, and the third and fourth subpixels of the first row are connected to a second row line.

14. The liquid crystal display of claim 13, wherein the third and fourth subpixels of the second row are connected to the first row line, and the first and second subpixels of the second row are connected to a third row line.

15. The liquid crystal display of claim 12, wherein the first subpixel of the first row is connected to a first column line, and the second subpixel of the second row, which is disposed in the same column as the first subpixel of the first row, is connected to a second column line.

16. The liquid crystal display of claim 15, wherein the third subpixel of the second row is connected to the second column line, and the third subpixel of the first row, which is disposed in the same column as the third subpixel of the second row, is connected to a third column line.

17. The liquid crystal display of claim 12, wherein the first and third subpixels of the first row are connected to a first row line, and the second and fourth subpixels of the first row are connected to a second row line.

18. The liquid crystal display of claim 7, wherein the first subpixel in a first row and the first subpixel in a second row are disposed in a same column.

19. The liquid crystal display of claim 18, wherein the third subpixel in a first row and the third subpixel in a second row are disposed in a same column.

20. The liquid crystal display of claim 19, wherein the third subpixel of the first row is disposed between the first and second subpixels, and the second subpixel of the first row is disposed between the third and fourth subpixels.