Phosphor-Dispersed Photosensitive Resin for Display Luminance
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Solution Overview
Problem
Conventional color filters in display devices, which rely on pigments or dyes, face limitations in enhancing luminance, prompting the need for alternative solutions that can effectively represent colors using phosphors to improve light emission efficiency.
Innovation Solution
A photosensitive resin composition comprising a phosphor with a particle size between 2 nm and 10 nm, dispersed in a polymer resin, along with a photopolymerizable compound, photopolymerization initiator, alkali soluble resin, and dispersant, is used to create a color filter that enhances luminance by optimizing light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If pigment or dye-based colorants are used in color filters, then color representation is achieved, but luminance enhancement is limited
Solution Approach 1:
The patent changes the particle size parameter of phosphors to the nanometer range (2-10 nm), which fundamentally alters the optical properties and light emission efficiency, thereby achieving enhanced luminance while maintaining color representation capability
Solution Approach 2:
The patent creates a composite photosensitive resin composition incorporating phosphors, photopolymerizable compounds, and dispersants, combining multiple materials to achieve both color representation and luminance enhancement that neither component could achieve alone
2Illumination intensity
If phosphor particle size is reduced to enhance luminance, then light emission efficiency improves, but particle dispersion uniformity becomes challenging
Solution Approach 1:
The patent introduces dispersants as intermediary substances that mediate between the phosphor particles and the resin matrix, enabling uniform dispersion of ultra-fine phosphors (2-10 nm) throughout the photosensitive composition without aggregation
Solution Approach 2:
The patent optimizes multiple parameters including phosphor particle size (2-10 nm), photopolymerizable compound content (20-70 wt%), and dispersant content (1-20 wt%) to achieve both high light emission efficiency and uniform particle dispersion
3Illumination intensity
If phosphor agglomerate particle size is controlled to meet specific criteria, then luminance characteristics improve, but formulation complexity increases
Solution Approach 1:
The patent establishes specific parameter ranges for phosphor particle size (2-10 nm) and agglomerate particle size (λ/10 ≤ PS ≤ 5λ) that optimize luminance characteristics while providing clear formulation guidelines that manage complexity through standardization
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 achieves improved luminance characteristics in display devices by ensuring the phosphor particles are uniformly dispersed, meeting the agglomerate particle size criteria, thereby enhancing color representation and light intensity.
Implementation Method 1
a color filter using a phosphor represents a color based on a scheme in which a phosphor absorbs light from a predetermined light source to emit light having a wavelength different from that of the predetermined light source
Implementation Method 2
a photopolymerizable compound in an amount of about 4 wt % to about 70 wt %; a photopolymerization initiator in an amount of about 0.1 wt % to about 20 wt %
Data Source
AI summary
A photosensitive resin composition comprising: a solvent in an amount of about 60 percentage by weight (wt %) to about 95 wt %; and a solid content in an amount of about 5 wt % to about 40 wt %, with respect to a total weight of the photosensitive resin composition, wherein the solid content comprises: a phosphor in an amount of about 5 wt % to about 90 wt %; a photopolymerizable compound in an amount of about 4 wt % to about 70 wt %; a photopolymerization initiator in an amount of about 0.1 wt % to about 20 wt %; an alkali soluble resin in an amount of about 5 wt % to about 80 wt %; and a dispersant in an amount of about 0.1 wt % to about 12 wt %, with respect to a total weight of the solid content.