Curved LCD Panel Spacer Offset for Cell Thickness Uniformity
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Solution Overview
Problem
Inhomogeneous cell thickness in curved liquid crystal display panels leads to inferior display due to relative movement between the color filter substrate and the array substrate during bending, causing dislocation of spacers and bosses.
Innovation Solution
The liquid crystal display panel features spacers on the upper substrate with distances to the central axis shorter than their corresponding bosses on the lower substrate, allowing for precise alignment and abutment after bending, with auxiliary spacers providing additional support to maintain constant cell thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If the liquid crystal display panel is bent to form a curved shape, then the display device can restore human eyes' true visual perception, but the spacers and bosses become dislocated causing inhomogeneous cell thickness
Solution Approach 1:
The patent applies preliminary action by pre-positioning the spacers at locations that are intentionally offset from their final corresponding boss positions. This preliminary misalignment is calculated based on the expected bending deformation, so that when the panel is bent, the spacers naturally move into correct alignment with the bosses, maintaining uniform cell thickness in the curved state.
Solution Approach 2:
The patent changes the positional parameters of the spacers relative to the bosses. Specifically, the distance between spacer centers and boss centers is deliberately set to be non-zero in the planar state, but this distance becomes zero (or approaches zero) after bending, transforming the alignment state from misaligned to aligned through the bending process.
2Ease of manufacture
If the spacers are positioned to align with bosses in the planar state, then the assembly is simple, but the cell thickness becomes inhomogeneous after bending
Solution Approach 1:
The patent applies preliminary action by pre-positioning the spacers at locations that are intentionally offset from their final corresponding boss positions. This preliminary misalignment is calculated based on the expected bending deformation, so that when the panel is bent, the spacers naturally move into correct alignment with the bosses, maintaining uniform cell thickness in the curved state.
3Shape
If the liquid crystal display panel is bent, then the display can achieve equal distances from different pixels to the human eyes, but the relative movement between substrates causes inferior display
Solution Approach 1:
The patent applies preliminary action by pre-positioning the spacers at locations that are intentionally offset from their final corresponding boss positions. This preliminary misalignment is calculated based on the expected bending deformation, so that when the panel is bent, the spacers naturally move into correct alignment with the bosses, maintaining uniform cell thickness in the curved state.
Solution Approach 2:
The patent changes the positional parameters of the spacers relative to the bosses. Specifically, the distance between spacer centers and boss centers is deliberately set to be non-zero in the planar state, but this distance becomes zero (or approaches zero) after bending, transforming the alignment state from misaligned to aligned through the bending process.
Data Source
AI summary
Provided is a liquid crystal display panel used in a curved display device and the curved display device. This belongs to the field of display technologies, and solves the technical problem of inferior display caused by inhomogeneous cell thickness that would easily occur to an existing curved display device. The liquid crystal display panel includes: an upper substrate provided with a plurality of spacers thereon; and a lower substrate provided with a plurality of bosses thereon, in one-to-one correspondence with the plurality of spacers. At least one of the plurality of spacers has a distance to a central axis of the liquid crystal display panel shorter than a distance from its corresponding boss to the central axis of the liquid crystal display panel. The liquid crystal display panel can be used in large-sized curved display devices such as liquid crystal display televisions.