LCD Repair Line Framework Routing Inside IC Chip
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Solution Overview
Problem
In large-scaled liquid crystal display panels, the increased routing path of repair lines leads to higher signal impedance, resulting in signal attenuation and increased manufacturing costs, posing a challenge for maintaining image quality and reducing costs.
Innovation Solution
The repair line framework involves routing part of the repair line inside the integrated circuit chip and positioning it under the black matrix within the display region, reducing the routing length and impedance of the repair line, while keeping it unnoticeable and minimizing the substrate area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the routing path of repair lines is increased to cover larger display areas, then the coverage area is improved, but the signal impedance increases and signal attenuation worsens
Solution Approach 1:
The patent introduces integrated circuit chips as intermediary components that contain buffer circuits. These buffers act as signal regeneration stations along the repair line path, receiving attenuated signals and retransmitting them with restored strength, thereby enabling long-distance signal transmission without quality degradation
Solution Approach 2:
The patent transitions the repair line routing from a two-dimensional surface path on the substrate to a three-dimensional path that penetrates through the substrate and utilizes the internal wiring layers of integrated circuit chips, effectively shortening the physical routing length while maintaining coverage
2Area of stationary object
If the routing length of repair line is increased to achieve comprehensive coverage, then the coverage is improved, but the impedance increases and manufacturing cost increases
Solution Approach 1:
The integrated circuit chips serve multiple functions: they provide buffer circuits for signal regeneration, contain internal wiring that acts as repair line segments, and integrate control logic. This multi-functionality reduces the need for separate dedicated repair line components, thereby lowering overall manufacturing cost despite enhanced coverage capabilities
3Manufacturing precision
If the repair line is routed outside the display region, then the display quality is improved, but the routing length increases and impedance increases
Solution Approach 1:
Instead of routing repair lines along the conventional external path around the display region edges, the patent inverts the approach by routing lines through the internal layers of the substrate and utilizing the vertical dimension through chip penetration, thereby shortening the effective routing length while maintaining display quality
Data Source
AI summary
A repair line framework of liquid crystal display is provided. By disposing part of the repair line inside the integrated circuit chip so that the routing of part of the repair line will penetrate through the integrated circuit chip before returning to the panel, or by routing part of the repair line disposed on the substrate within the display region so that the routing is positioned under the black matrix of the color filter, the routing length of the repair line is shortened and the impedance of the repair line is reduced.