Line on Glass LCD Signal Lines for Voltage Compensation
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Solution Overview
Problem
The line resistance in LOG signal lines of liquid crystal displays causes distortion of gate control signals and power signals, leading to picture quality issues such as horizontal stripes and color anomalies due to voltage differences among gate drive ICs.
Innovation Solution
The solution involves forming first and second signal lines on the substrate with varying line widths or thicknesses to compensate for line resistance, ensuring that the resistance values of the signal lines differ, thereby maintaining consistent voltage levels across gate drive ICs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If LOG signal lines are used to eliminate PCB, then device thickness is reduced, but line resistance increases causing signal distortion
Solution Approach 1:
The patent applies different line widths to different signal lines based on their specific resistance requirements. Critical signal lines have wider widths to reduce resistance, while less critical lines maintain standard widths. This localized differentiation resolves the contradiction by optimizing signal quality where needed while maintaining overall device thinness.
Solution Approach 2:
The patent changes the physical parameter of line width to control resistance. By adjusting the width parameter of LOG signal lines, the invention compensates for resistance effects without increasing device thickness, thus resolving the contradiction between thinness and signal quality.
2Ease of manufacture
If uniform line widths are used for all signal lines, then manufacturing is simplified, but voltage differences occur among gate drive ICs
Solution Approach 1:
Instead of uniform line widths, the patent implements local quality variations where each signal line's width is tailored to its specific electrical requirements. This ensures voltage consistency among gate drive ICs while maintaining manufacturability through systematic design rules.
Solution Approach 2:
The patent aims to create equipotential conditions among gate drive ICs by compensating for line resistance through differentiated line widths. This ensures that all ICs receive similar voltage levels despite varying distances from the source, resolving the voltage consistency issue.
3Reliability
If line width is increased to reduce line resistance, then signal quality improves, but device area increases
Solution Approach 1:
The patent applies wider line widths only to specific signal lines that require lower resistance, rather than increasing the width of all signal lines uniformly. This selective approach improves signal quality where necessary while minimizing the increase in overall device area.
Solution Approach 2:
The patent applies the principle of partial action by increasing line width only for critical signal paths that suffer from resistance effects, rather than excessively increasing all line widths. This optimizes signal quality improvement while controlling area expansion.
Data Source
AI summary
A line on glass liquid crystal display includes a liquid crystal display panel on a substrate and having liquid crystal cells in matrix; gate and data lines on the liquid crystal display panel; a thin film transistor at intersections of the gate and data lines; at least two types of a plurality of integrated circuits at peripheral portion of the liquid crystal display panel to drive the liquid crystal display panel; first signal lines on the substrate of the liquid crystal display panel to supply an input driving signal to the plurality of first type integrated circuits; and second signal lines to supply an output driving signal to the liquid crystal display panel, wherein at least one of a line width and a line thickness of each of the second signal lines are different such that a resistance value of corresponding first signal lines are different from each other.