Pixel Electrode Micro-Slit Pattern for LCD Transmittance
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Solution Overview
Problem
Conventional liquid crystal display (LCD) devices face limitations in enhancing transmittance due to the difficulty in finely forming micro-slits on pixel electrodes, which restricts the improvement of image clarity when viewed from different angles.
Innovation Solution
The implementation of an array substrate with a thin-film transistor (TFT) layer, a control electrode, an insulation layer, and a pixel electrode, where the pixel electrode has a micro-slit pattern and is electrically connected to the control electrode, allowing for an effective voltage difference to control liquid crystal molecule direction and enhance transmittance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If micro-slits are formed in the pixel electrode to increase transmittance, then transmittance is improved, but manufacturing precision is worsened due to process technology limits
Solution Approach 1:
The pixel electrode is divided into multiple electrode parts separated by intermediate portions, creating a patterned structure that increases transmittance while remaining manufacturable
Solution Approach 2:
A control electrode is introduced in the space between the pixel electrode and the liquid crystal layer, adding a new dimension to the electrode structure. This control electrode generates a fringe field that enhances liquid crystal molecule alignment without requiring finer micro-slit patterns
2Adaptability or versatility
If patterned vertical alignment is used to reduce image distortion, then viewing angle characteristics are improved, but device complexity is worsened
Solution Approach 1:
The pixel electrode is segmented into electrode parts with intermediate portions, creating a patterned structure that generates fringe fields for improved viewing angles
Solution Approach 2:
A control electrode is introduced as an intermediary element between the pixel electrode and liquid crystal layer. This control electrode works in conjunction with the patterned pixel electrode to enhance liquid crystal alignment and viewing angle characteristics
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 effectively increases transmittance by controlling liquid crystal molecule direction, thereby improving image clarity and reducing distortion when viewed from various angles.
Implementation Method 1
When an electric field is applied to a liquid crystal layer interposed between the lower substrate and the upper substrate, a fringe field is generated at an edge portion of the patterned pixel electrode and the patterned common electrode to align liquid crystal molecules along a plurality of directions
Implementation Method 2
The micro-slits are finely formed so as to increase the transmittance of the LCD device
Data Source
AI summary
A liquid crystal display having enhanced transmittance in which the pixel electrode includes a micro-slit pattern and overlaps a control electrode on the insulation layer so that an effective voltage difference is formed between the pixel electrode and the control electrode to control the directional characteristics of the liquid crystal molecules.