Display Device Color Filter Overlap Signal Line Reflection
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Solution Overview
Problem
Liquid crystal displays face a challenge in maintaining high contrast ratios without reducing the aperture ratio, as light reflected from signal lines degrades display quality.
Innovation Solution
The design incorporates specific overlapping portions of color filters with varying light transmittance and signal line configurations to minimize the impact of light reflection without reducing the aperture ratio, including wider overlapping portions for reduced light transmittance and strategic placement of signal lines to avoid overlapping with data lines.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal lines are placed in the display area to increase resolution, then resolution improves, but light reflected from signal lines degrades display quality
Solution Approach 1:
The color filters are configured with different light transmittance characteristics in different regions. Specifically, color filters in regions where signal lines are present have lower light transmittance compared to regions without signal lines, thereby locally adapting the optical properties to suppress reflection visibility while maintaining overall display quality.
Solution Approach 2:
The patent utilizes different color filter configurations and light transmittance properties to optically mask the signal lines. By adjusting the color and transmittance characteristics of color filters in specific regions, the reflected light from signal lines is suppressed, making them less visible and improving display quality.
2Object-affected harmful factors
If aperture ratio is reduced to minimize signal line reflection, then display quality improves, but aperture ratio decreases
Solution Approach 1:
Instead of uniformly reducing the aperture ratio across the entire display, the patent applies localized optical control only in regions where signal lines are present. The color filters in these specific regions have adjusted light transmittance to suppress reflection, while other regions maintain their original aperture ratio, thereby preserving overall display efficiency.
Solution Approach 2:
The color filters serve as an intermediary element that optically masks the signal lines without requiring physical reduction of the aperture ratio. By positioning color filters with appropriate transmittance characteristics between the signal lines and the viewer, the harmful reflection is suppressed while the aperture ratio remains unchanged.
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 approach effectively reduces the influence of light reflected from signal lines on display quality while maintaining the aperture ratio, enhancing overall display performance.
Implementation Method 1
a first overlapping portion in which the first color filter and the second color filter overlap each other... a second overlapping portion in which the second color filter and the third color filter overlap each other... a third overlapping portion in which the third color filter and the first color filter overlap each other
Data Source
AI summary
A display device comprises a plurality of pixels including a first pixel having a first color filter, a second pixel having a second color filter, and a third pixel having a third color filter, a plurality of first signal lines and a plurality of second signal lines, a first overlapping portion in which the first and the second color filters overlap each other in an adjacent portion of the first and the second pixels, a second overlapping portion in which the second and the third color filters overlap each other that overlap one of the second signal lines in an adjacent portion of the second and the third pixels, and a third overlapping portion in which the third and the first color filters overlap each other that overlap two of the second signal lines in an adjacent portion of the third and the first pixels.