Photosensitive Resin Composition for Display Color Filters
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Solution Overview
Problem
Existing color filters in liquid crystal displays face challenges in achieving excellent luminance and heat resistance while maintaining photo-efficiency and color reproducibility, as the patterning process can cause damage to nanophosphors, leading to quenching phenomena and reduced exposure sensitivity.
Innovation Solution
A photosensitive resin composition is developed, incorporating a nanophosphor, an acetophenone-based initiator, and additional initiators like thioxanthone-based, oxime-based, and benzophenone-based initiators, which prevents quenching and enhances exposure sensitivity, ensuring improved patterning reliability and light efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If heat resistance is improved by using nanophosphor in color filter, then luminance characteristic is improved, but photo-efficiency and color reproducibility are decreased due to quenching phenomena during patterning
Solution Approach 1:
The patent applies preliminary action by adding specific photo-polymerization initiators (acetophenone-based, thioxanthone-based, oxime-based, or benzophenone-based) to the photosensitive resin composition before patterning. These initiators are selected to enable effective UV curing at controlled conditions that prevent excessive heat generation and quenching of nanophosphors, thus preserving photo-efficiency while maintaining heat resistance and color reproducibility.
2Reliability
If exposure sensitivity is reduced due to quenching phenomena in patterning process, then color filter manufacturing becomes unreliable, but maintaining high exposure sensitivity causes damage to nanophosphors
Solution Approach 1:
The patent applies parameter changes by carefully controlling the types and concentrations of photo-polymerization initiators in the photosensitive resin composition. By selecting specific initiator combinations (acetophenone-based 1-10 wt%, thioxanthone-based 1-10 wt%, oxime-based 1-10 wt%, or benzophenone-based 1-10 wt% based on total resin composition), the curing parameters are optimized to achieve reliable patterning while minimizing quenching phenomena and protecting nanophosphors from damage.
3Illumination intensity
If pigment is used in color filter, then color filtering function is achieved, but luminance characteristic cannot be secured
Solution Approach 1:
The patent applies composite materials by combining nanophosphors (quantum dots or inorganic phosphors) with photosensitive resin containing specifically selected photo-polymerization initiators. This composite structure replaces traditional pigments while maintaining color filtering function and simultaneously achieving superior luminance characteristics. The nanophosphors convert UV light to visible light wavelengths, enabling both color filtering and high luminance in the same material system.
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 reduces quenching phenomena during the manufacturing process, providing a photosensitive resin composition with enhanced exposure sensitivity, improved light efficiency, and reliable patterning, thereby enhancing the performance of color filters in display devices.
Implementation Method 1
a photo-polymerization initiator including an acetophenone-based initiator; and a photo-polymerization compound
Implementation Method 2
A photosensitive resin composition according to an exemplary embodiment of the present disclosure includes: a nanophosphor
Data Source
AI summary
A photosensitive resin composition according to an exemplary embodiment of the present invention includes: a nanophosphor; a photo-polymerization initiator including an acetophenone-based initiator; and a photo-polymerization compound, wherein the photo-polymerization initiator further includes at least one among a thioxanthone-based initiator, an oxime-based initiator, and a benzophenone-based initiator.