Curved Display Panel Light Shielding Width Variation
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Solution Overview
Problem
Curved display panels face misalignment issues due to varying radius of curvature, leading to intermixing of colors as light passes through adjacent color filters, which existing solutions cannot adequately prevent, especially when misalignments are unforeseen.
Innovation Solution
A display panel design with a curved substrate featuring color filters arranged in a matrix and light shielding portions between them, where the width of light shielding portions differs between central and end portions to prevent color intermixing, even with misalignments, by ensuring proper alignment and blocking of light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the pitch of pixel regions is made smaller on the inner side substrate to reduce misalignment, then misalignment is reduced, but the device complexity increases and cannot adequately prevent color intermixing
Solution Approach 1:
The light shielding portion has different widths at different locations: wider at the end portion and narrower at the central portion. This local variation in width compensates for the varying misalignment程度 across the curved display, providing stronger light blocking where misalignment is more severe without unnecessarily increasing complexity throughout the entire device.
2Object-affected harmful factors
If the width of light shielding portions is increased to prevent color intermixing, then color isolation is improved, but the display area is reduced
Solution Approach 1:
The light shielding portion's width is optimized locally: it is wider at the end portion where misalignment is more severe and color intermixing is more problematic, while being narrower at the central portion where misalignment is minimal. This localized approach prevents color intermixing where needed without unnecessarily reducing the display area across the entire screen.
3Ease of manufacture
If uniform light shielding width is used across the curved substrate, then manufacturing is simplified, but color intermixing occurs at end portions due to misalignment
Solution Approach 1:
Instead of using a uniform light shielding width, the patent implements a non-uniform width distribution that is wider at the end portion and narrower at the central portion. This local differentiation addresses the specific problem of color intermixing at the end portions where misalignment is more severe, while maintaining reasonable manufacturability through a systematic gradient design.
Data Source
AI summary
A display panel according to an embodiment of the present invention is a display panel having a display region including a plurality of pixels arrayed along a first direction and along a second direction which is different from the first direction, the display panel including a first substrate and a second substrate opposing each other, the first substrate and the second substrate being curved along the first direction. The first substrate has a color filter layer that includes: a plurality of color filters provided respectively corresponding to the plurality of pixels; and a black matrix having a plurality of light shielding portions disposed between adjacent color filters adjoining along the first direction. The second substrate includes a plurality of pixel electrodes respectively included in the plurality of pixels. The display region includes a central portion including a center of the display region along the first direction and, on both sides of the central portion along the first direction, a first end portion and a second end portion that are located adjacent to the central portion. The plurality of pixels include a plurality of central pixels contained in the central portion and a plurality of end pixels contained in the first end portion or the second end portion. The plurality of light shielding portions include a plurality of central light shielding portions contained in the central portion and a plurality of end light shielding portions contained in the first end portion or the second end portion. A width of the plurality of end light shielding portions along the first direction is greater than a width of the plurality of central light shielding portions along the first direction.