Optical Substrate Layout for Higher Light Efficiency and Color Isolation
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Solution Overview
Problem
Traditional display devices use black matrices that require organic solvents, leading to environmental issues and reduced light efficiency due to light absorption, and are difficult to pattern effectively.
Innovation Solution
An optical substrate with a transparent matrix substrate, reflective film, and light-absorbing film configuration that eliminates the need for organic solvents and enhances light-emitting efficiency and reduces pixel color interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional black matrix is used to reduce color interference between pixels, then color interference is reduced, but light efficiency is attenuated due to light absorption
Solution Approach 1:
The black matrix is segmented into two separate functional films: a reflective film (first film) and a light-absorbing film (second film). This segmentation allows each film to perform its specific function optimally - the reflective film redirects light without absorbing it, while the light-absorbing film handles color interference reduction, thereby reducing overall light loss
Solution Approach 2:
Different regions of the optical substrate are assigned different optical properties. The reflective film is positioned to reflect light in specific directions, while the light-absorbing film is positioned to absorb light in specific wavelengths. This local differentiation of optical properties allows simultaneous optimization of light efficiency and color interference reduction
2Manufacturing precision
If the black matrix is made thicker to improve patterning control, then patterning control is improved, but light absorption increases and light efficiency decreases
Solution Approach 1:
The thick black matrix is divided into two separate films with distinct functions. The reflective film provides structural support and light redirection, while the light-absorbing film is kept thin to minimize light absorption. This segmentation allows adequate patterning control without the need for excessive thickness
Solution Approach 2:
The light-absorbing function is extracted from the structural black matrix framework. By separating the light-absorbing material from the structural support function, the design achieves sufficient patterning control through the reflective film's structural integrity while minimizing light absorption through a thinner light-absorbing layer
3Ease of manufacture
If organic solvents are used in the traditional black matrix preparation method, then the black matrix can be formed effectively, but environmental pollution occurs
Solution Approach 1:
The preparation method transitions from using organic solvents to using water as the solvent medium. This parameter change in the solvent type eliminates environmental pollution while maintaining the effectiveness of black matrix formation through water-based processing techniques
Solution Approach 2:
The chemical process using organic solvents is replaced with a water-based processing method. This substitution eliminates harmful chemical substances while achieving the same black matrix formation objective through environmentally friendly aqueous solutions
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 provides an environmentally friendly display device with improved light-emitting efficiency and reduced color interference between pixels.
Implementation Method 1
The reflective film is attached to the first surface and extends from the first surface to the first portion of the opening sidewall
Implementation Method 2
the black matrix tends to absorb light, which causes the efficiency to be attenuated and therefore reduced
Data Source
AI summary
An optical substrate includes a transparent matrix substrate, a reflective film, and a light-absorbing film. The transparent matrix substrate includes a first surface, a second surface, and openings. The openings are in the transparent matrix substrate. The openings include an opening sidewall connecting the first surface and the second surface. Each of the opening sidewalls includes a first portion and a second portion. The reflective film extends from the first surface and is attached to the first portion of each opening sidewall. The light-absorbing film is attached only to the second surface or attached to the second surface and further extending to the second portion of the opening sidewall.