Floating Line Blocks Leakage Current in LCD Electrostatic Discharge
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Solution Overview
Problem
LCD devices suffer from electrical current leakage through electrostatic dischargers, leading to increased electric current consumption and horizontal line defects, especially exacerbated by high temperatures.
Innovation Solution
Incorporating a floating line along the periphery of the display area that prevents electric current leakage by maintaining a floating state and connecting electrostatic dischargers between the common line and the floating line, as well as between the floating line and the gate and data lines, to safely discharge static electricity without increasing electric current consumption or causing horizontal line defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrostatic dischargers are connected between the common line and gate/data lines to discharge static electricity, then static electricity protection is improved, but leakage current increases causing horizontal line defects and increased power consumption
Solution Approach 1:
A floating line is introduced as an intermediary element between the common line and the gate/data lines. The floating line serves as a mediator that can receive static electricity from the common line through first electrostatic dischargers, then transfer it to gate lines through second electrostatic dischargers, or to data lines through third electrostatic dischargers, without creating a direct leakage path that would cause horizontal line defects or excessive power consumption.
Solution Approach 2:
The electrostatic discharge path is segmented into multiple stages: first electrostatic dischargers connect the common line to the floating line, second electrostatic dischargers connect the floating line to gate lines, and third electrostatic dischargers connect the floating line to data lines. This segmentation allows controlled discharge of static electricity while preventing direct leakage current paths that would cause display defects and power consumption issues.
2Reliability
If electrostatic dischargers are connected between the common line and gate/data lines to discharge static electricity, then static electricity protection is improved, but horizontal line defects occur due to leakage current
Solution Approach 1:
The floating line acts as an intermediary that prevents direct connection between the common line and gate/data lines. By routing electrostatic discharge through the floating line intermediate stage, the patent eliminates the direct leakage current path that causes horizontal line defects while maintaining static electricity protection functionality.
Solution Approach 2:
The discharge path is divided into separate segments with the floating line as an intermediate stage. Second electrostatic dischargers connect the floating line to gate lines and third electrostatic dischargers connect the floating line to data lines, creating controlled discharge paths that prevent the harmful leakage current effects that cause horizontal line defects.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The floating line effectively blocks leakage current, preventing it from reaching the gate and data lines, thus maintaining stable operation and reducing electric current consumption while avoiding horizontal line defects.
Implementation Method 1
a floating line disposed along the periphery of the display area to maintain a floating state
Implementation Method 2
The first and second electrostatic dischargers 130 and 132 allow static electricity externally applied to the common line 120 to flow to the gate lines G1 ̃Gn or the data lines D1 ̃Dm
Data Source
AI summary
An LCD device adapted to prevent a malfunction caused by an electrical current leaking through an electrostatic discharger is disclosed. The LCD device includes the floating line disposed between common line and gate lines or data lines. Electrostatic dischargers are connected between the common line and the floating line as well as between the floating line and the gate lines or the data lines. As such, the LCD device blocks the leakage current caused by the common voltage on the common line from flowing through the electrostatic dischargers. Therefore, the LCD device prevents the increase of electric current consumption and a horizontal defect.