Liquid Crystal Display Backplane Layouts and Addressing for Non-Standard Subpixel Arrangements

• US 20080252581A1
• Filed: 06/26/2008
• Published: 10/16/2008
• 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: Credelle, Thomas Lloyd, Brown Elliott, Candice Hellen, Han, Seok Jin, Schlegel, Matthew Osborne
• Granted Patent: US 8,144,094 B2
• Time in Patent Office: Days
• 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 tiled across said display panel in a regular pattern;

the subpixel repeating group comprises at least two rows, each said row 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) connecting to said subpixel at an intersection of 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

further 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 wherein said polarity signal comprises a 1×

1 dot inversion polarity signal.

3. The liquid crystal display of claim 1 wherein 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.