Color Filter Substrate Edge Thickness for LCD Light Leakage
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Solution Overview
Problem
Conventional horizontal-orientation LCDs, such as IPS and ADS, suffer from light leakage due to cell gap issues resulting in poor uniformity.
Innovation Solution
A color-film substrate with a color filter layer featuring a first display area and a second display area, where the thickness of the color filter elements in the second area is greater than in the first area, arranged in a specific sequence and configuration to reduce transmission rates and minimize light leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the color filter layer uses uniform thickness across the display panel, then the manufacturing process is simple, but light leakage occurs in edge areas due to cell gap issues
Solution Approach 1:
The patent applies local quality by creating different thickness zones in the color filter layer: a first thickness in the central display area and a greater second thickness in the peripheral area. This localized thickness variation compensates for cell gap issues in edge regions, reducing light leakage without complicating the overall manufacturing process.
2Object-affected harmful factors
If the color filter elements in the second display area have greater thickness, then light leakage is reduced, but the transmission rate of the display panel decreases in edge areas
Solution Approach 1:
The patent applies local quality by creating different thickness zones in the color filter layer: a first thickness in the central display area and a greater second thickness in the peripheral area. This localized thickness variation compensates for cell gap issues in edge regions, reducing light leakage without complicating the overall manufacturing process.
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
The solution effectively reduces light leakage and enhances brightness uniformity by adjusting the thickness of color filter elements, ensuring a lower transmission rate in edge areas, thereby improving display panel uniformity.
Implementation Method 1
a thickness of the color filter elements of the second display area is larger than a thickness of the color filter elements of the first display area such that a transmission rate of the display panel corresponding to the second display area is smaller than the transmission rate of the display panel corresponding to the first display area
Data Source
AI summary
A color-film substrate and a liquid crystal device are disclosed. The color-film includes a substrate body and a color filter layer on the substrate body. The color filter layer includes duplicated color filter elements arranged in a sequence, and the color filter layer includes a first display area and a second display area arranged in a rim of the first display area. A thickness of the color filter elements of the second display area is larger than a thickness of the photo-resistor of the first display area such that a transmission rate of the display panel corresponding to the second display area is smaller than the transmission rate of the display panel corresponding to the first display area. In this way, the transmission rate of edges of the display panel is reduced and the light leakage problem can be overcome such that the uniformity of the brightness is enhanced.