Driver Circuit Shield Patterns for LCD Panel Cutting
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Solution Overview
Problem
The existing LCD panel manufacturing process is inflexible and costly due to the need for multiple photomasks for different display panel sizes, leading to issues of conductor material corrosion and short circuits during the cutting process.
Innovation Solution
A display panel structure featuring standard and dummy pixel units with specific conductor patterns and shield blocks, along with a driver circuit design that includes stage circuits and connection wires with varying widths and clearance regions, to prevent corrosion and short circuits during cutting, and improve manufacturing yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple photomasks are used for different display panel sizes, then manufacturing precision can be maintained for each size, but manufacturing complexity and cost increase
Solution Approach 1:
The patent applies universality by designing a single photomask that can be used for manufacturing display panels of multiple different sizes. The photomask includes a substrate with a single pattern layer that defines conductor patterns, shield patterns, and pixel electrode patterns which can be universally applied across different panel sizes, eliminating the need for multiple size-specific photomasks and thereby reducing manufacturing complexity while maintaining precision
Solution Approach 2:
The patent segments the photomask design into functional regions including a substrate, pattern layer, conductor patterns, shield patterns, and pixel electrode patterns. This segmentation allows the single photomask to be flexibly configured for different panel sizes by selectively activating or deactivating certain pattern regions, thereby achieving multi-functionality without compromising manufacturing precision
2Adaptability or versatility
If the display panel is cut after manufacturing, then different sizes can be produced, but conductor material corrosion and short circuits occur
Solution Approach 1:
The patent applies preliminary action by pre-designing the photomask with conductor patterns, shield patterns, and pixel electrode patterns that are optimized to prevent corrosion and short circuits during the cutting process. The shield patterns are specifically positioned to protect conductor materials from corrosion, and the pattern geometry is designed to avoid short circuits, ensuring reliability is maintained even when panels are cut to different sizes
Solution Approach 2:
The patent introduces shield patterns as intermediary elements between conductor patterns and the environment. These shield patterns act as protective mediators that prevent direct exposure of conductor materials to corrosive elements during cutting, thereby preventing corrosion and maintaining conductor reliability while allowing size flexibility
3Adaptability or versatility
If conductor patterns are exposed during cutting, then size customization is possible, but short circuits between layers occur
Solution Approach 1:
The patent introduces shield patterns as intermediary protective elements positioned between conductor patterns and potential sources of short circuits. These shield patterns maintain electrical isolation during the cutting process, preventing short circuits between layers while allowing the panel to be cut to customized sizes. The shield patterns act as electrical barriers that preserve isolation precision
Solution Approach 2:
The patent applies preliminary action by pre-configuring the photomask with shield patterns that are specifically designed to maintain electrical isolation during cutting. The shield patterns are positioned and sized in advance to ensure that when the panel is cut to different sizes, conductor patterns remain properly isolated from other conductive elements, thereby preventing short circuits and maintaining manufacturing precision
Data Source
AI summary
A display panel includes a substrate, a plurality of standard pixel units, and a plurality of dummy pixel units. A plurality of first conductor patterns and a plurality of shield blocks of a shield pattern layer are arranged in an array above the substrate. Each of the standard pixel units includes one of the first conductor patterns and a first shield block of the shield blocks. The first shield blocks and the first conductor patterns are overlapped, respectively. Each of the dummy pixel units includes a second shield block of the shield blocks. The second shield blocks and the first conductor patterns are not overlapped. A first edge of the substrate is spaced apart from a second edge of one of the standard pixel units adjacent to the dummy pixel units by a first distance. The first distance is within a range from 50 μm to 3000 μm.