LCD Pixel Electrode Repair via Reference Voltage Line Orientation
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Solution Overview
Problem
The existing method of forming minute slits in pixel electrodes to repair defective pixels in liquid crystal displays (LCDs) is ineffective in easily changing bright spots to dark spots within the dark spot specification, leading to decreased repair effectiveness.
Innovation Solution
The proposed solution involves a liquid crystal display (LCD) structure with a thin film transistor (TFT) forming area connected to data and gate lines, along with a reference voltage line that extends vertically between high and low gray subpixel areas, allowing for the use of connectors and short-circuiting techniques to convert defective pixels into dark spots through precise electrode manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If minute slits are formed in pixel electrodes to create multiple branch electrodes for wide viewing angle, then viewing angle is improved, but the ability to easily repair defective pixels by converting them to dark spots deteriorates
Solution Approach 1:
The pixel electrode is divided into multiple branch electrodes by forming minute slits, which segments the electrode structure to achieve wide viewing angle while maintaining the capability for dark spot repair through selective connector removal
Solution Approach 2:
The repair method extracts or removes specific connectors that connect branch electrodes to the common electrode, thereby isolating defective pixels and converting them to dark spots without affecting the overall minute slit structure
2Reliability
If connectors are added to connect branch electrodes to common electrode, then electrode connectivity is improved, but device complexity increases
Solution Approach 1:
Connectors are selectively placed only at specific locations where branch electrodes need to connect to the common electrode, rather than uniformly across the entire structure, thereby maintaining necessary connectivity while minimizing overall complexity
Data Source
AI summary
A liquid crystal display includes pixels including a display area that includes a thin film transistor forming area connected to a corresponding data line among data lines, a corresponding gate line among gate lines, and a reference voltage line, two low gray subpixel areas, and one high gray subpixel area disposed between the two low gray subpixel areas, a data driver supplying data signals corresponding to the pixels to the data lines, a gate driver supplying gate voltages corresponding to the pixels to the gate lines, and a voltage supplier supplying a reference voltage to the two low gray subpixel area of the pixels through the reference voltage line, where the reference voltage line extends in a vertical direction along a boundary formed by the high gray subpixel and a first low gray subpixel adjacent to the thin film transistor forming area among the two low gray subpixels.