LCD Color Filter Electrode Lines for Static Charge Dissipation
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Solution Overview
Problem
Image sticking in liquid crystal displays (LCDs) occurs due to static electricity accumulating on the color filter substrate, interfering with the liquid crystal driving electrical field during the manufacturing and usage of LCDs.
Innovation Solution
A liquid crystal display (LCD) color filter substrate with a black matrix comprising horizontal and vertical bars, and electrode lines on the transparent substrate to eliminate static electricity, connected to an external voltage source to neutralize charges, and optionally second electrode lines on color resin units for enhanced charge dissipation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the color filter substrate is used in LCD manufacturing, then the display function is achieved, but static electricity accumulates on the substrate causing image sticking
Solution Approach 1:
The patent introduces an electrode line as an intermediary component between the black matrix and the external voltage source. This electrode line serves as a mediator to conduct away accumulated static charges from the color filter substrate, preventing image sticking while maintaining the normal display function of the color filter substrate.
Solution Approach 2:
The patent extracts the harmful static electricity from the color filter substrate by providing a dedicated charge dissipation path through the electrode line. This separates the display function from the charge accumulation problem, allowing the substrate to maintain its primary function while the electrode line handles the harmful electrostatic charges.
2Object-affected harmful factors
If electrode lines are added to the color filter substrate to eliminate static electricity, then image sticking is prevented, but the device structure becomes more complex
Solution Approach 1:
The patent merges the electrode line with the existing black matrix structure. The electrode line is formed in correspondence with the horizontal or vertical bars of the black matrix, combining the shielding function of the black matrix with the charge dissipation function of the electrode line into a single integrated structure, thereby minimizing additional complexity.
Solution Approach 2:
The black matrix structure serves multiple functions: it provides shielding for the underlying elements and simultaneously serves as a carrier for the electrode line that dissipates static charges. This multi-functionality reduces the need for separate components and simplifies the overall device structure.
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
Effectively eliminates image sticking by neutralizing static electricity, ensuring stable liquid crystal driving and improved display performance.
Implementation Method 1
electrode lines, provided on the transparent substrate in correspondence with the respective horizontal bars or the vertical bars of the black matrix and disposed in the area where the black matrix is disposed
Implementation Method 2
charges will accumulate gradually on the color filter substrate. Not eliminated, the charges interfere with the liquid crystal driving electrical field, which leads to image sticking
Data Source
AI summary
An embodiment provides a liquid crystal display (LCD) color filter substrate comprises a transparent substrate and a black matrix, which comprises a plurality of horizontal bars and vertical bars. Electrode lines are provide on the horizontal bars or vertical bars of the black matrix, and are used to eliminate charges accumulated on the transparent substrate.