Display Panel Circuit Layout for Seamless LCD-LED Splicing
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Solution Overview
Problem
The splicing of traditional bistable liquid crystal displays results in visible gaps due to the difference in driving mechanisms between liquid crystal subpixels and micro light-emitting diodes, requiring a specialized electrical circuit structure that complicates light-emitting efficiency.
Innovation Solution
A display panel design with intersecting gate and drive lines arranged in specific directions to minimize the distance between intersect points, allowing for efficient routing of signals to both liquid crystal and LED subpixels, thereby reducing wiring area and improving light transmittance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If micro light-emitting diodes are added on the boarder to achieve image continuity, then the splicing gap visibility is reduced, but the device complexity increases due to needing special electrical circuit structure to drive two different light-emitting modules
Solution Approach 1:
The patent combines liquid crystal subpixels and micro LEDs into a unified display panel structure where both types of light-emitting elements share the same substrate and are controlled by integrated drive circuits. This merging approach allows simultaneous driving of voltage-driven liquid crystal and current-driven LEDs while maintaining a compact, unified electrical circuit architecture rather than requiring separate complex circuit systems.
2Use of energy by moving object
If special electrical circuit structure is used to drive both liquid crystal subpixels and micro LEDs, then light-emitting efficiency can be maintained, but the wiring area increases
Solution Approach 1:
The patent employs a matrix arrangement of gate lines and drive lines that intersect to form pixel locations, transitioning from linear wiring to a two-dimensional grid structure. This dimensional change allows signals to reach both liquid crystal subpixels and micro LEDs through the intersection points of orthogonal line sets, significantly reducing the total wiring area compared to separate linear routing for each element type.
Solution Approach 2:
The drive circuits are designed to perform multiple functions by selectively driving different types of light-emitting elements. The same drive line infrastructure serves both liquid crystal subpixels and micro LEDs, with the circuitry capable of switching between voltage-driven and current-driven modes as needed, eliminating the need for dedicated separate wiring systems for each element type.
Data Source
AI summary
A display panel includes a substrate, a first circuit routing area, a second circuit routing area, a plurality of first gate lines, a plurality of second gate lines, a plurality of first drive lines and a plurality of second drive lines. Each of the first gate lines and one of the second gate lines intersect at a first intersect point. Each of the first drive lines and one of the second drive lines electrically connect at a second intersect point. The distance on the first direction between one of the first intersect points and one of the second intersect points on the second direction is smaller than the width of a liquid crystal subpixel on the first direction.