Display Panel Sub-Pixel Deflection Angle for Edge Smoothness

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Solution Overview

Problem

Conventional display panels exhibit a significant saw-tooth phenomenon at the edges of images due to abnormally shaped regions with sub-pixels arranged in a step-like distribution, leading to undesirable visual effects.

Innovation Solution

The display panel incorporates abnormally shaped regions where sub-pixels are arranged in a step-like distribution with deflection angles greater than 0 degrees and less than 180 degrees at the edges of the steps relative to non-step sub-pixels, aligning the opening regions' contours with the abnormally shaped region's contour to minimize the saw-tooth effect.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Area of stationary object

If sub-pixels are arranged in a step-like distribution in abnormally shaped regions, then the screen occupation ratio is improved and ultra-narrow edge frame is achieved, but the saw-tooth phenomenon at the image edge becomes significant

Engineering Contradiction:
Improvescreen occupation ratioVSAvoidimage edge smoothness
Core Design Contradiction:
Area of stationary objectVSShape

Solution Approach 1:

The patent applies local quality by differentiating the arrangement of sub-pixels in abnormally shaped regions from the normal grid arrangement. Specifically, in the fourth corner region (abnormally shaped region), sub-pixels are arranged with varying pitch distances - the pitch in the row direction increases from the first to the third sub-pixel rows, while the pitch in the column direction increases from the first to the second sub-pixel columns. This local variation in sub-pixel arrangement adapts to the curved contour of the abnormally shaped region, thereby reducing the saw-tooth phenomenon at image edges while maintaining high screen occupation ratio.

Inventive Principle:
Principle #3Local quality

2Ease of manufacture

If sub-pixels are arranged uniformly in a grid pattern, then manufacturing is simplified, but the visual effect at abnormally shaped regions deteriorates with significant saw-tooth phenomenon

Engineering Contradiction:
Improvesub-pixel arrangement simplicityVSAvoidimage edge smoothness
Core Design Contradiction:
Ease of manufactureVSShape

Solution Approach 1:

The patent implements local quality by creating a non-uniform sub-pixel arrangement specifically in the abnormally shaped region while maintaining uniform grid arrangement in normal regions. In the fourth corner region, the sub-pixel pitch is locally adjusted - row-direction pitch increases across sub-pixel rows 1-3, and column-direction pitch increases across sub-pixel columns 1-2. This localized adaptation to the curved boundary contour reduces the saw-tooth effect without complicating the overall manufacturing process, as the adjustment is confined to specific regions rather than the entire display panel.

Inventive Principle:
Principle #3Local quality

Data Source

PatentUS10706769B2Display panel and display device
Publication Date: 2020.07.07 WUHAN TIANMA MICRO ELECTRONICS CO LTD
  • US10706769B2 patent drawing
  • US10706769B2 patent drawing
  • US10706769B2 patent drawing

AI summary

The disclosure discloses a display panel and a display device, and there is at least one abnormally shaped region in a display region of the display panel, and sub-pixels located in the abnormally shaped region are arranged in a step-like distribution, where at least opening regions of sub-pixels at the edges of the steps have a deflection angle of more than 0 degree and less than 180 degrees relative to opening regions of sub-pixels which are not located at the steps.