Color Filter Substrate Electrode Connectivity for LCD Viewing Angle
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Solution Overview
Problem
Conventional color filter substrates in LCDs often form undercut structures at the edge of the stereo-structure, leading to non-conductive ITO electrodes and an incomplete multi-domain electric field, which limits the viewing angle and manufacturing yield.
Innovation Solution
A color filter substrate design featuring a transparent substrate with a light-shade layer, a color filter layer, and an electrode layer comprising first and second electrode regions, slits, and connecting portions that cover the edge of the color filter layer, ensuring electrical connectivity and forming a multi-domain electric field.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the ITO electrode is patterned to form multiple electrode regions to create multi-domain electric field, then the viewing angle is improved, but the electrode may cut off at the edge of the stereo-structure due to undercut formation
Solution Approach 1:
The patent applies preliminary action by forming a filling material in the undercut structure before depositing the ITO electrode. This pre-filling step prevents the electrode from cutting off at the edges by ensuring continuous coverage, thereby maintaining electrode conductivity while enabling the multi-domain electric field configuration for improved viewing angle.
2Adaptability or versatility
If the electrode layer is patterned to form multiple regions, then the multi-domain electric field is enhanced, but the manufacturing precision is reduced due to undercut structures
Solution Approach 1:
The patent uses filling material as an intermediary substance that fills the undercut structures formed during electrode patterning. This intermediary layer ensures precise electrode edge alignment and continuous conductivity by bridging the gaps created by undercut formation, thereby maintaining manufacturing precision while enabling enhanced multi-domain electric field formation.
3Ease of manufacture
If the ITO electrode cuts off at the edge of the stereo-structure, then the manufacturing process is simplified, but the electrical conductivity is lost
Solution Approach 1:
The patent applies preliminary action by pre-filling the undercut structures with filling material before depositing the ITO electrode. This ensures that the electrode maintains continuous electrical conductivity across all regions, including edge areas, while still allowing for simplified electrode patterning processes. The filling material prevents conductivity loss without complicating the manufacturing steps.
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
This design prevents electrode cutoff, enhances the formation of a multi-domain electric field, and increases the viewing angle and manufacturing yield by maintaining electrical conductivity across the electrode regions.
Implementation Method 1
the ITO electrode of the CF substrate is patterned to form a plurality of electrode regions, thereby forming the multi-domain electric field to control the orientation of liquid crystal molecules
Implementation Method 2
A liquid crystal panel of the LCD can change the voltage to control the orientation of liquid crystal molecules in a liquid crystal layer. The liquid crystal molecules in the liquid crystal layer can switch the light provided from a backlight module to pass through or not
Data Source
AI summary
A color filter substrate and applications thereof are disclosed. The color filter substrate comprises a transparent substrate, a light-shade layer, a color filter layer and an electrode layer. The light-shade layer and the color filter layer are disposed on the transparent substrate. The electrode layer is formed on the light-shade layer and the color filter layer, wherein the electrode layer comprises at least one first electrode region, at least one second electrode region, at least one slit and at least one connecting portion. The first electrode region and the second electrode region are separated by the slit. The connecting portion is connected between the first electrode region and the second electrode region. The color filter substrate is applicable to a liquid crystal display panel and a liquid crystal display (LCD) apparatus.