Liquid Crystal Panel Branch Lines for Bezel Thinning
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Solution Overview
Problem
As liquid crystal display devices increase in screen size, the phenomenon of waveform rounding occurs due to increased wiring path resistance, which is exacerbated by the demand for thinner bezels, as thickening stem lines contradicts the need for a thinner bezel while thinning them increases resistance, leading to display non-uniformity.
Innovation Solution
The implementation of a liquid crystal panel with branch lines routed across the pixel region, connected to storage capacitor lines, allowing for reduced wiring path resistance and elimination or thinning of stem lines, thereby suppressing waveform rounding and enabling bezel thinning without increasing resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If stem lines are thickened to reduce wiring path resistance, then waveform rounding is suppressed, but the bezel width increases
Solution Approach 1:
The patent divides the single stem line structure into multiple branch lines that extend across the pixel region. This segmentation creates multiple parallel wiring paths from the storage capacitor lines to the opposite edge, reducing the resistance of each individual path while maintaining a compact overall structure that does not increase bezel width.
Solution Approach 2:
Instead of increasing the width (horizontal dimension) of stem lines at the edge, the patent extends wiring paths in the vertical dimension by routing branch lines across the pixel region from storage capacitor lines to the opposite edge, achieving resistance reduction without bezel widening.
2Length of stationary object
If stem lines are thinned to reduce bezel width, then bezel thickness decreases, but wiring path resistance increases causing waveform rounding
Solution Approach 1:
The patent segments the wiring function into multiple branch lines distributed across the pixel region. Each branch line can be thin (maintaining narrow bezel), but the collective effect of multiple parallel paths provides low total resistance, suppressing waveform rounding.
Solution Approach 2:
Multiple thin branch lines are merged in parallel to create an equivalent thick conductor effect. The combined conductive capacity of multiple thin lines equals or exceeds that of a single thick line, achieving low resistance without increased bezel width.
3Reliability
If wiring path length is increased to route lines across pixel region, then resistance decreases through multiple paths, but device complexity increases
Solution Approach 1:
The branch lines serve multiple functions: they provide low-resistance wiring paths, acts as stem lines connecting to the opposite edge, and can be integrated with existing pixel structures. This multi-functionality reduces the need for additional dedicated structures, offsetting the apparent complexity increase.
Data Source
AI summary
A liquid crystal panel (10) includes a plurality of pixels arranged in a matrix pattern having rows and columns. A plurality of Cs bus lines (43c) as storage capacitor lines are routed in the row direction of the liquid crystal panel (10). A plurality of branch lines (310) are routed in the column direction across a pixel region (10a). The branch lines (310) are connected to the Cs bus lines (43c) so that control signals are sent to storage capacitors from the branch lines (310) through the Cs bus lines (43c).