Integrated Color Filter Substrate for LCD Aperture Ratio
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Solution Overview
Problem
Conventional liquid crystal display (LCD) manufacturing processes face issues with reduced aperture ratio and brightness due to device deviations in the alignment of black matrices during the assembling process, and complex cleaning procedures for color filter substrates, leading to decreased image quality and efficiency.
Innovation Solution
A display module with a color filter layer directly provided on the array structural layer, using a mixture of nematic liquid crystal, reactive monomer, and chiral agent to form color pixel layers, allowing precise control of cholesteric phase liquid crystal pitch and color, thereby simplifying the manufacturing process and increasing aperture ratio and brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the array substrate and color filter substrate are assembled separately with black matrices, then the black matrices can shield light, but device deviation causes alignment deviation which reduces aperture ratio and brightness
Solution Approach 1:
The patent merges the color filter layer and black matrix layer into a single integrated color filter substrate. The black matrices are formed as part of the same substrate as the color filter layers, eliminating the need for separate assembly of array substrate and color filter substrate. This integration removes the alignment deviation problem caused by device deviation during assembly, as the black matrices and color filter layers are precisely positioned relative to each other on the same substrate.
2Ease of manufacture
If conventional resin materials are used for color filter layers, then the color filter substrate can be formed, but multiple cleaning processes are required which complicates the procedure and reduces manufacturing efficiency
Solution Approach 1:
The patent changes the material parameter from conventional resin materials to photo-polymerizable liquid crystal materials for forming the color filter layers. This parameter change enables the use of photolithography techniques where the liquid crystal material is coated on the substrate, exposed to light through a mask to form patterns, and then cured. This approach eliminates the need for multiple cleaning processes between forming different color layers, as the liquid crystal material can be directly patterned and cured in place, significantly simplifying the manufacturing procedure and improving productivity.
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 solution effectively increases the aperture ratio and brightness of the display device by eliminating alignment deviations and reducing the number of cleaning processes, resulting in improved image quality and manufacturing efficiency.
Implementation Method 1
mixtures of the chiral agent and the nematic liquid crystal, instead of conventional color filter resin materials, are used to form the color pixel layers. By controlling the content of the chiral agent, the pitch of cholesteric phase liquid crystal which is generated by inducement of the nematic liquid crystal can be adjusted, and in turn the color of the cholesteric liquid crystal can be determined
Implementation Method 2
coating a color pixel mixture material on the array structural layer after the above structure has been completed; conducting an illumination on the color pixel mixture material, so that color pixel layers are formed between adjacent black matrixes, respectively
Data Source
AI summary
According to embodiments of the invention, there are provided a display module, a display device and a method of manufacturing the display module. The display module comprises an array structural layer and a color filter layer provided on a surface of the array structural layer. The color filter layer comprises black matrixes and color pixel layers, and the color pixel layers are formed between adjacent black matrixes, respectively.