Pixel Structure With Dual Transparent Electrodes For Color Shift Correction

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional liquid crystal display (LCD) technologies face challenges in achieving wide viewing angles without color shift, often resulting in a loss of aperture ratio and insufficient luminance due to the need for additional transistors or capacitors in each pixel.

Innovation Solution

A pixel structure with a reflective electrode, two transparent electrodes, and a semiconductor layer, where the semiconductor layer has conductive regions and channel regions to create different electrical fields across the electrodes, using a single conductive region connected to the data line and overlapping with scan lines, and incorporating a transparent capacitor electrode to form storage capacitors, which stabilizes display quality while maintaining a higher aperture ratio.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If additional transistors or capacitors are added to each pixel to improve color shift performance, then color shift is improved, but aperture ratio decreases and luminance becomes insufficient

Engineering Contradiction:

Improvecolor shift performanceVSAvoidaperture ratio

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

The invention merges the function of the second transistor with the existing first transistor by forming a dual-conductive-region semiconductor layer that can independently control both pixel electrodes. This integration eliminates the need for separate additional transistors or capacitors while maintaining the ability to produce different electrical fields for color shift correction, thereby preserving aperture ratio and luminance.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The semiconductor layer is designed with multi-functionality by incorporating two conductive regions within a single layer structure. This allows the same semiconductor layer to serve both as the active channel for transistor operation and as the control element for generating differential electrical fields across pixel electrodes, eliminating the need for separate dedicated components for color shift management.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of manufacture

If two transistors are formed in a single pixel to produce different electrical fields, then color shift is improved, but aperture ratio is reduced

Engineering Contradiction:

Improvecolor shift performanceVSAvoidaperture ratio

Core Design Contradiction:

Ease of manufactureVSArea of stationary object

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

This configuration improves color shift performance while minimizing the loss of aperture ratio, ensuring better luminance and display stability by allowing different transparent electrodes to produce distinct electrical fields and utilizing storage capacitors effectively.

Implementation Method 1

different pixel electrodes in a single pixel respectively produce electrical field with different intensities by using capacitor coupling effect so as to make the liquid crystal molecules over different pixel electrodes have different arrangements

Methodology Applied

Scientific EffectCapacitor coupling effect: Capacitance

Implementation Method 2

make the liquid crystal molecules arranged in multi-directions alignment so as to obtain a plurality of different-alignment domains

Methodology Applied

Scientific EffectLiquid crystal alignment: Liquid Crystals

Data Source

PatentUS7773167B2Pixel structure comprising two first conductive regions, a second conductive region and two first channel regions, wherein the first transparent electrode is located between the reflective electrode and second transparent electrode

Publication Date: 2010.08.10 AU OPTRONICS CORP

AI summary

A pixel structure disposed on a substrate and electrically connected to two scan lines and a data line is provided. The pixel structure includes a reflective electrode, a first transparent electrode, a second transparent electrode and a semiconductor layer. The first transparent electrode is electrically connected to the reflective electrode and is insulated from the second transparent electrode. The semiconductor layer has two first conductive regions, a second conductive region and two first channel regions, wherein the first conductive regions are respectively electrically connected to the reflective electrode and the second transparent electrode, the second conductive region is located between the first conductive regions and electrically connected to the data line, a part of the semiconductor layer overlapped with the scan lines is defined as first channel regions and each of the first channel regions is respectively electrically connected between the second conductive region and each first conductive region.