Liquid Crystal Display Pad Structures with Thickness Gradient
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Solution Overview
Problem
Current liquid crystal display panels are prone to generating interference patterns at blind holes, which affect their optical performance and aesthetics.
Innovation Solution
The liquid crystal display panel design features pad structures with gradually decreasing thickness from a predetermined area to a light transmissive functional area, preventing interference patterns by optimizing the thickness gradient of the pad structures, which includes a black matrix layer, photoresist layer, and pad support layer, and are spaced apart to improve display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pad structures with uniform thickness are used in the display area, then manufacturing is simplified, but interference patterns appear in the light transmissive functional area
Solution Approach 1:
The pad structures are designed with different thickness characteristics in different regions: in the first display area, pad structures have a first thickness, while in the second display area (peripheral area), pad structures have a second thickness that is different from the first thickness. This local differentiation eliminates interference patterns in the light transmissive functional area while maintaining manufacturing feasibility through a systematic thickness variation approach.
2Device complexity
If pad structures are placed close to the light transmissive functional area, then wiring density is improved, but interference patterns are generated
Solution Approach 1:
The invention divides the display area into a first display area and a second display area (peripheral area), where pad structures in the second display area have different thickness characteristics (second thickness) compared to those in the first display area (first thickness). This allows pad structures to be positioned closer to the light transmissive functional area for improved wiring density while the differentiated thickness in the peripheral area prevents interference patterns.
3Reliability
If the display area is fully utilized for pad structures, then electrical connections are optimized, but optical performance deteriorates
Solution Approach 1:
The invention creates a peripheral area (second display area) with differentiated pad structure thickness (second thickness) adjacent to the light transmissive functional area. This local thickness variation optimizes electrical connections in the peripheral region while preventing interference patterns that would degrade optical performance in the light transmissive functional area, thus achieving both reliable electrical connections and maintained optical performance.
Data Source
AI summary
A liquid crystal display panel includes an array substrate, a color filter substrate, a plurality of pad structures disposed between the array substrate and the color filter substrate, a display area, and a light transmissive functional area. The pad structures are correspondingly disposed on the display area. The display area includes a predetermined area disposed at a periphery of the light transmissive functional area, and a thickness of each of the pad structures disposed on the predetermined area gradually decreases along a direction from the predetermined area to the light transmissive functional area.