Stereoscopic Display Color Filter Dummy Part Light Leakage
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Solution Overview
Problem
Conventional stereoscopic image displays with black matrices formed outside liquid crystal panels face issues with light leakage due to thin film transistors, which is difficult to address in terms of structure and cost.
Innovation Solution
A stereoscopic image display design featuring a liquid crystal panel with RGB color filters on one substrate and a black matrix on the other, where at least one color filter has a dummy part overlapping adjacent filters to prevent light leakage, combined with a patterned retarder film for image separation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a black matrix is formed outside a liquid crystal panel to reduce crosstalk effects, then crosstalk reduction and viewing angle improvement are achieved, but light leakage occurs in regions corresponding to thin film transistors
Solution Approach 1:
The color filter is divided into a light-blocking part and a dummy part, where the dummy part specifically targets the thin film transistor regions to block light leakage, while the light-blocking part addresses crosstalk in other areas. This segmentation allows different regions of the color filter to serve different functions.
Solution Approach 2:
The color filter is designed with non-uniform structure where the dummy part has different properties than the light-blocking part. The dummy part is specifically positioned to overlap with thin film transistor regions to address local light leakage issues, while maintaining overall color filter functionality.
2Object-affected harmful factors
If the design of thin film transistors or related wires is changed to prevent light leakage, then light leakage is reduced, but structural complexity and manufacturing cost increase
Solution Approach 1:
The light leakage prevention function is extracted from the thin film transistor design and transferred to the color filter structure. By adding a dummy part to the color filter that overlaps with thin film transistor regions, the light leakage problem is solved without modifying the thin film transistor design, thus avoiding increased structural complexity and cost.
3Object-affected harmful factors
If a dummy part is added to color filters to prevent light leakage, then light leakage is blocked, but manufacturing complexity increases
Solution Approach 1:
The dummy part is integrated into the existing color filter manufacturing process. The color filter is formed to include both the light-blocking part and the dummy part in a single manufacturing step, merging the light leakage prevention function with the color filter fabrication without requiring separate additional processes.
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
Effectively blocks light leakage from thin film transistors and improves viewing angle without requiring complex structural changes or increased costs, making it suitable for mass production.
Implementation Method 1
a patterned retarder film for separating an image displayed on the liquid crystal panel
Implementation Method 2
RGB color filters positioned on a first surface of the upper substrate
Data Source
AI summary
The present invention has been made in an effort to provide a stereoscopic image display comprising: a liquid crystal panel comprising a lower substrate and an upper substrate; RGB color filters positioned on a first surface of the upper substrate; thin film transistors positioned on a first surface of the lower substrate; a black matrix positioned on a second surface of the upper substrate; and a patterned retarder film for separating an image displayed on the liquid crystal panel, wherein at least one of the RGB color filters has a dummy part overlapping at least a portion of one or both of the other color filters.