Display Panel Asymmetric Sub-pixel Arrangement Color Shift

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Solution Overview

Problem

Conventional flat panel display devices with sub-pixels arranged in a stripe pattern suffer from a low aperture ratio, leading to reduced high-resolution expression ability due to the black matrix between sub-pixels, and exhibit a color shift phenomenon when bright and dark images are displayed together.

Innovation Solution

The display panel features sub-pixels arranged alternately in vertical lines, with the third sub-pixel positioned differently, and employs an image processing unit to modulate red and blue data using equations that adjust weights to reduce color shift artifacts, achieving horizontal and vertical color symmetry without compromising sharpness.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If sub-pixels are arranged in a stripe pattern, then the structure is simple and easy to manufacture, but the aperture ratio is lowered due to the black matrix between sub-pixels

Engineering Contradiction:
Improvesub-pixel arrangement simplicityVSAvoidaperture ratio
Core Design Contradiction:
Ease of manufactureVSArea of stationary object

Solution Approach 1:

The patent applies asymmetry by arranging sub-pixels in a non-uniform pattern where green sub-pixels are positioned at different locations compared to red and blue sub-pixels. Specifically, green sub-pixels are arranged at alternating positions (e.g., odd-numbered pixel positions in one row, even-numbered in the next), while red and blue sub-pixels follow a different arrangement pattern. This asymmetric arrangement reduces the need for black matrix structures between sub-pixels, thereby increasing the aperture ratio while maintaining manufacturability.

Inventive Principle:
Principle #4Asymmetry

2Ease of manufacture

If sub-pixels are arranged in a stripe pattern, then the manufacturing process is simplified, but high-resolution expression ability is lowered

Engineering Contradiction:
Improvemanufacturing process simplicityVSAvoidhigh-resolution expression ability
Core Design Contradiction:
Ease of manufactureVSManufacturing precision

Solution Approach 1:

The asymmetric sub-pixel arrangement with green sub-pixels at different positions than red and blue sub-pixels creates a more efficient pixel structure that improves high-resolution expression. This arrangement allows for better utilization of pixel area and reduces the black matrix interference, enabling sharper image rendering while keeping the manufacturing process relatively simple through standardized fabrication techniques.

Inventive Principle:
Principle #4Asymmetry

3Device complexity

If conventional sub-pixel arrangement is used, then the display structure is simple, but color shift phenomenon occurs when bright and dark images are displayed together

Engineering Contradiction:
Improvedisplay structure complexityVSAvoidcolor shift phenomenon
Core Design Contradiction:
Device complexityVSObject-generated harmful factors

Solution Approach 1:

The asymmetric arrangement of green sub-pixels at alternating positions compared to red and blue sub-pixels creates a more balanced pixel structure that reduces color shift artifacts. This arrangement improves color rendering accuracy by ensuring more uniform color distribution across the display, particularly when displaying images with both bright and dark regions, while maintaining relatively simple display structure.

Inventive Principle:
Principle #4Asymmetry

Data Source

PatentUS9830858B2Display panel and display device having the same
Publication Date: 2017.11.28 LG DISPLAY CO LTD
  • US9830858B2 patent drawing
  • US9830858B2 patent drawing
  • US9830858B2 patent drawing

AI summary

Disclosed herein are a display panel capable of improving high-resolution expression ability and a display device having the same. The display panel includes a plurality of unit pixels, each of which includes first and second sub-pixels alternately arranged in the same vertical line and a third sub-pixel arranged in a different vertical line than the first and second sub-pixels, wherein, when a bright (or dark) image is realized on a dark (or bright) background image, the color of the third sub-pixel is realized at leftmost and rightmost portions of the bright (or dark) image.