Curved LCD Light-Shielding Pattern Alignment
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Solution Overview
Problem
Existing liquid crystal displays (LCDs) face issues with misalignment of substrates when curved, leading to light leakage and color mixing due to improper adjustment of light-shielding patterns, which previous techniques inadequately address by assuming a monotonic increase in misalignment towards the peripheral section.
Innovation Solution
The LCD design involves curving both the array and counter substrates with light-shielding patterns that initially increase and then decrease in shift amount from the central to the peripheral section, ensuring proper alignment and reducing light leakage and color mixing by adjusting the pitch and width of light-shielding patterns accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the array substrate and counter substrate are bent into a curved shape, then the display achieves a sophisticated design and small footprint, but the substrates become misaligned causing light leakage and color mixing
Solution Approach 1:
The patent applies different pitch values to light-shielding patterns at different locations on the curved display. Specifically, the pitch is set to a first value in a first region and a second value in a second region, with the ratio between them being 0.95 to 1.05. This local variation in pitch compensates for the non-uniform misalignment that occurs when the display is curved, preventing light leakage and color mixing at different positions along the curve.
2Manufacturing precision
If the pitch of light-shielding patterns decreases toward the peripheral area, then misalignment at peripheral sections is reduced, but light leakage and color mixing occur at central sections
Solution Approach 1:
The patent implements a dual-region pitch strategy where the pitch of light-shielding patterns is set to a first value in a first region and a second value in a second region. The ratio between these pitch values is controlled to be 0.95 to 1.05. This local differentiation allows the patent to prevent both light leakage and color mixing at different positions along the curved display without the drawbacks of uniform pitch adjustment.
Data Source
AI summary
An array substrate includes inter-pixel patterns. A counter substrate includes light-shielding patterns. In a case where a position of an inter-pixel pattern to be noticed is displaced from a peak of a curved shape to a peripheral section of a display area, a shift amount of the position of a light-shielding pattern to be noticed when the counter substrate is in a flat state from the position of the inter-pixel pattern to be noticed when the array substrate is in a flat state first increases and then decreases. Alternatively, a substrate that is one of the array substrate and the counter substrate includes light-shielding patterns. In a case where a position of a light-shielding pattern to be noticed is displaced from a peak of a curved shape to a peripheral section of a display area, a width of the light-shielding pattern to be noticed first increases and then decreases.