Light Shielding Layer for LCD Flicker Reduction
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Solution Overview
Problem
Liquid crystal display (LCD) apparatuses suffer from flicker and afterimage issues due to differences in optical transmittance between positive and negative frames during alternating current driving, which degrade image display quality.
Innovation Solution
Incorporating a light shielding layer that overlaps the conductive patterns of the pixel electrode, ensuring the number of conductive patterns and slits are the same, and positioning the edge of the light shielding layer at the center of the conductive patterns to minimize luminance differences between frames, thereby reducing flicker and afterimage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If alternating current driving is used to prevent liquid crystal deterioration, then reliability is improved, but flicker and afterimage occur due to luminance differences between positive and negative frames
Solution Approach 1:
The patent introduces a light shielding layer that asymmetrically overlaps only the outermost conductive patterns of the pixel electrode, creating an asymmetric structure that compensates for the luminance differences between positive and negative frames. This asymmetric light shielding balances the optical transmittance across different driving polarities, eliminating flicker and afterimage while maintaining alternating current driving benefits
2Object-generated harmful factors
If the light shielding layer overlaps the outermost conductive pattern, then luminance difference between frames is minimized, but the structure becomes more complex
Solution Approach 1:
The light shielding layer is strategically positioned to overlap only the outermost conductive patterns of the pixel electrode rather than the entire electrode structure. This localized approach addresses the specific problem of luminance difference at the electrode edges without requiring complex modifications to the overall electrode design, maintaining simplicity while achieving the desired optical balance
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 minimizes flicker and afterimage, enhancing the display quality by maintaining consistent luminance between frames and shielding external electrodes, resulting in improved image display.
Implementation Method 1
a light shielding layer overlapping an outermost conductive pattern of the second electrode in the second direction
Data Source
AI summary
A liquid crystal display apparatus includes a first substrate, a first electrode on the first substrate, a second electrode overlapping the first electrode and including a plurality of conductive patterns elongated in a first direction, and a light shielding layer overlapping an outermost conductive pattern of the second electrode.