Liquid Crystal Display Panel Spacer Height Variation
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Solution Overview
Problem
Liquid crystal display panels face non-uniform brightness due to cell gap reduction in the central region under external pressure and gravity, leading to uneven brightness in a dark state.
Innovation Solution
The liquid crystal display panel is divided into a central region and a peripheral region, with spacers in the central region set to a first height greater than those in the peripheral region, providing a larger supporting force to maintain uniform cell gaps and ensure consistent brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If spacers of the same height are provided between the array substrate and the opposite substrate, then the manufacturing process is simple, but the cell gap becomes non-uniform under external pressure and gravity
Solution Approach 1:
The patent applies local quality by differentiating spacer heights based on spatial location. Spacers in the central region have a first height while spacers in the peripheral region have a second height. This local differentiation compensates for the non-uniform pressure distribution, maintaining uniform cell gap across the display panel.
Solution Approach 2:
The patent changes the physical parameter of spacer height from a constant value to a spatially varying value. By adjusting the height parameter of spacers based on their location (central vs. peripheral regions), the patent compensates for gravitational and pressure-induced deformations, ensuring uniform cell gap.
2Manufacturing precision
If the cell gap is maintained uniformly across the entire panel, then the brightness is uniform, but the spacer height must be increased in the central region which complicates the structure
Solution Approach 1:
The patent implements local quality by assigning different spacer heights to different regions. The central region uses spacers with a first height while the peripheral region uses spacers with a second height, optimizing cell gap uniformity without requiring complex adjustable mechanisms.
Solution Approach 2:
The patent segments the display panel into two distinct regions (central and peripheral) with different spacer height requirements. This segmentation allows each region to be optimized independently, achieving overall uniformity through localized solutions.
Data Source
AI summary
The embodiment of the present invention provides a liquid crystal display panel comprising an array substrate and an opposite substrate arranged opposite to each other, and spacers provided between the array substrate and the opposite substrate; the liquid crystal display panel includes a central region and a peripheral region; heights of the spacers within the central region without extending and contracting are set as a first height; heights of the spacers within the peripheral region without extending and contracting are set as second heights; and the first height is larger than the second heights.