Quantum Dot Color Filter Substrate Mixed Ink Manufacturing
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Solution Overview
Problem
Existing quantum dot liquid crystal display devices require complex and low-productivity processes to prepare separate red, green, and blue quantum dot materials for color filtering, which complicates manufacturing and reduces yield.
Innovation Solution
A quantum dot color filter substrate is designed with a substrate comprising sub-pixel areas of different materials, where the second and third sub-pixel areas share the same material, allowing for simultaneous production using a single photo mask in photolithography, and include layers of filter films and a black matrix to separate pixel areas, with the materials being adjusted according to demand.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If separate red, green, and blue quantum dot materials are prepared in different processes, then color display quality is improved, but manufacturing complexity increases and productivity decreases
Solution Approach 1:
The patent combines the preparation of red and green quantum dot materials into a single coating process using a mixed quantum dot ink containing both red and green quantum dots. This merging of previously separate processes reduces manufacturing complexity while maintaining color display quality, directly resolving the technical contradiction between manufacturing precision and device complexity
Solution Approach 2:
The quantum dot layer serves multiple functions simultaneously: it acts as both the red quantum dot layer and green quantum dot layer through a single material coating process. This multi-functionality eliminates the need for separate preparation processes for different colored quantum dots, reducing both manufacturing complexity and improving productivity
2Manufacturing precision
If separate red, green, and blue quantum dot materials are prepared in different processes, then color purity is maintained, but productivity decreases
Solution Approach 1:
The patent merges the coating processes for red and green quantum dots into a single step by using a mixed quantum dot ink formulation. This approach maintains color purity through proper material selection while dramatically improving productivity by eliminating redundant coating and curing cycles
Solution Approach 2:
The patent performs preliminary mixing of red and green quantum dots in the ink formulation stage, creating a pre-prepared mixed quantum dot ink. This preliminary action ensures color purity is built into the material composition while enabling rapid application in a single coating process, thereby improving overall manufacturing 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
This approach simplifies the manufacturing process, improves yield by allowing the red and green sub-pixel areas to be produced with the same photo mask, and ensures accurate color display by adjusting the ratio of quantum dot materials, thereby enhancing productivity and color gamut.
Implementation Method 1
A quantum dot material in the second quantum dot layer emits green light under blue excitation, and a quantum dot material in the third quantum dot layer emits red light under blue excitation
Implementation Method 2
The quantum dot glue is obtained by mixing a red quantum dot material, a green quantum dot material, and a photo-initiator in a thermosetting glue
Data Source
AI summary
A quantum dot color filter substrate, and a method of manufacturing the same are provided. The quantum dot color filter substrate includes a substrate. The substrate includes a plurality of first sub-pixel areas, a plurality of second sub-pixel areas, and a plurality of third sub-pixel areas. Material of the plurality of second sub-pixel areas and material of the plurality of third sub-pixel areas are same, and the material of the plurality of second sub-pixel areas and the plurality of third sub-pixel areas is different from material of the plurality of first sub-pixel areas.