Orthogonal Light Shields with Intermediate Layer for High-Definition Displays
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Solution Overview
Problem
Liquid crystal display devices face challenges in achieving high definition with a high aperture ratio due to misalignment between substrates and light diffraction effects, which affect the formation of light shields and result in decreased display quality and aperture ratio.
Innovation Solution
A display device structure featuring a first substrate and a second substrate with light shields extending in orthogonal directions, separated by an intermediate layer, which reduces light diffraction and allows for precise formation of openings with minimized corner roundness, enabling high-definition displays with reduced light leakage and improved aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a light shielding layer is formed as stripes on substrates to achieve high definition, then the aperture ratio can be improved, but misalignment between substrates and light diffraction effects occur which decrease display quality and aperture ratio
Solution Approach 1:
The patent transitions from two-dimensional planar light shields to three-dimensional columnar light shields with specific cross-sectional shapes (triangular, rectangular, or trapezoidal). This dimensional change allows the light shields to extend in multiple directions and better control light propagation, reducing diffraction effects while maintaining high aperture ratios and preventing substrate misalignment issues
Solution Approach 2:
The patent modifies the geometric parameters of light shields by forming them with specific cross-sectional shapes (equilateral triangles, rectangles, or trapezoids) and controlling their pitch and dimensions. These parameter changes optimize light shielding performance while minimizing diffraction and enabling high-definition displays with reduced light leakage
2Manufacturing precision
If pixel size is reduced to achieve high definition, then the aperture ratio decreases due to light leakage and color mixture, but display quality must be maintained
Solution Approach 1:
By forming light shields as columns extending in the thickness direction with controlled cross-sectional shapes, the patent adds a vertical dimension to light shielding. This enables effective light blocking in reduced-pixel configurations without increasing lateral dimensions that would reduce aperture ratio, thereby preventing light leakage and color mixture while maintaining high definition
Solution Approach 2:
The patent applies different cross-sectional shapes (triangular, rectangular, or trapezoidal) to light shields at different locations and orientations to optimize local light shielding performance. This localized optimization prevents light leakage and color mixture in high-definition displays with reduced pixel sizes while maintaining overall high aperture ratio
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 suppresses light leakage and maintains high aperture ratio, preventing color mixture and maintaining display quality even with reduced pixel size, thus achieving high-definition liquid crystal display performance.
Implementation Method 1
light diffraction effects, which affect the formation of light shields and result in decreased display quality and aperture ratio
Data Source
AI summary
According to one embodiment, a display device includes a first substrate and a second substrate which are opposed to each other, wherein the second substrate includes, in a display area where an image is displayed, first light shields extending in a first direction and arranged apart from each other in a second direction which crosses the first direction, second light shields extending in the second direction and arranged apart from each other in the first direction, and an intermediate layer disposed between the first light shields and the second light shields, and the first light shields cross the second light shields via the intermediate layer.