Pixel Structure With Nested Drain Electrodes For Aperture Ratio
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing area of Thin Film Transistors (TFTs) in sub pixel units of liquid crystal displays to enhance driving ability leads to a decrease in pixel aperture ratio, as the larger TFTs occupy display regions.
Innovation Solution
A pixel structure with first and second pixel electrodes and a thin film transistor, where the source electrode has openings for the drain electrodes to extend into, allowing the TFT to occupy less display region while improving driving ability by increasing the width-to-length ratio of the channel region.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the area of TFT is increased to improve driving ability, then the driving ability of TFT is improved, but the pixel aperture ratio is decreased
Solution Approach 1:
The drain electrode extends into the opening of the source electrode in a vertical dimension, allowing the TFT channel to occupy space in the third dimension rather than only in the planar display area. This dimensional transition enables the TFT to achieve a larger effective channel area for improved driving capability while maintaining a compact footprint in the display plane, thus preserving the pixel aperture ratio.
Solution Approach 2:
The drain electrode is nested within the opening of the source electrode, creating a compact integrated structure. This nesting arrangement allows the TFT components to be tightly packed, maximizing the use of available space within the sub-pixel unit while maintaining clear functional differentiation between source, drain, and channel regions.
2Power
If the TFT area is increased to improve driving ability, then the driving ability is improved, but the display region is occupied
Solution Approach 1:
By extending the drain electrode vertically into the source electrode opening, the TFT channel region utilizes the vertical dimension to achieve larger effective area without consuming additional planar display space. This dimensional approach allows the TFT to be positioned efficiently within the sub-pixel unit, preserving the display region for optimal light emission.
Solution Approach 2:
The source electrode opening is strategically positioned at a specific location within the sub-pixel unit, allowing the TFT to be localized in a way that optimizes both driving capability and display region utilization. This localized arrangement ensures that the TFT components are concentrated in areas where they provide maximum functional benefit without unnecessarily reducing the overall display area.
Data Source
AI summary
A pixel structure, an array substrate, a display panel and a display apparatus are disclosed. The pixel structure includes: a first pixel electrode and a second pixel electrode which are arranged along a first direction, and a TFT between the first pixel electrode and the second pixel electrode. The first pixel electrode includes a first extension electrode extending toward the second pixel electrode, and the second pixel electrode includes a second extension electrode extending toward the first pixel electrode; the TFT includes a gate electrode, a source electrode, a first drain electrode and a second drain electrode which are insulated from each other; the source electrode includes a first opening and a second opening, the first drain electrode is connected with the first extension electrode and extends into the first opening, and the second drain electrode is connected with the second extension electrode and extends into the second opening.