Pixel Electrode Sub-Regions for Aperture Ratio

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Solution Overview

Problem

The multi-domain pixel electrode structure requires multiple TFTs for switching control, occupying more pixel area and reducing the aperture ratio of display devices, which in turn decreases the display effect.

Innovation Solution

A pixel structure is developed with a single electronic switching device and a pixel electrode divided into sub-pixel electrode regions with varying transmittances, using a gate line and data line for control, and orientated electrode lines with different tilt directions to reduce color shift and increase aperture ratio.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple TFTs are used for switching control in multi-domain pixel electrode structure, then different regions of pixel electrodes can be controlled independently, but the pixel area is occupied more, thereby reducing the aperture ratio

Engineering Contradiction:

Improveswitching control capabilityVSAvoidaperture ratio

Core Design Contradiction:

Adaptability or versatilityVSArea of stationary object

Solution Approach 1:

The patent merges multiple TFT control functions into a single TFT by integrating multiple electrode patterns (first, second, third, and fourth electrode patterns) within one pixel electrode. This allows the single TFT to control multiple sub-pixel regions with different transmittances, thereby maintaining multi-domain switching capability while reducing the number of TFTs and increasing the aperture ratio.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The pixel electrode is segmented into multiple sub-pixel electrode regions (first, second, third, and fourth sub-pixel electrode regions) with different transmittances. Each sub-region is controlled by specific electrode patterns that create different electric field distributions, enabling independent control of light transmittance in different regions while using only one TFT.

Inventive Principle:

Principle #1Segmentation

2Adaptability or versatility

If multiple TFTs are used for switching control, then different regions of pixel electrodes can be controlled independently, but the display effect is reduced due to lower aperture ratio

Engineering Contradiction:

Improveswitching control capabilityVSAvoiddisplay effect

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

Different sub-pixel electrode regions are designed with different transmittances to optimize local display quality. The first and second sub-pixel electrode regions have different transmittances from the third and fourth sub-pixel electrode regions, allowing each region to be optimized for its specific function while maintaining overall display performance and color accuracy.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS10775673B2Pixel structure and array substrate

Publication Date: 2020.09.15 HKC CORP LTD

AI summary

The present application provides a pixel structure and an array substrate. The pixel structure includes: a pixel structure, which includes: an electronic switching device; a pixel electrode electrically connected to the electronic switching device, in which the pixel electrode includes a plurality of sub-pixel electrode regions, and the transmittances of the plurality of sub-pixel electrode regions are different; a gate line disposed on a lateral side of the pixel electrode and electrically connected to the electronic switching device; and a data line disposed on another lateral side of the pixel electrode and electrically connected to the electronic switching device.