Complex Substrate for Display Apparatus with Integrated Wire Grid
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Solution Overview
Problem
Conventional display apparatuses face challenges in achieving reduced thickness and improved image display quality due to the complexity of optical members and their limited heat resistance, which affects luminance efficiency and manufacturing complexity.
Innovation Solution
A complex substrate is developed, comprising a lower base substrate with convex and concave patterns, a planarizing layer with different refractivity, and a wire grid pattern of nano wire metal patterns, which are integrated to enhance light transmission and control, allowing for the omission of additional optical components like prism sheets and polarizing plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If multiple separate optical members (prism sheet, polarizing plate) are used to achieve light control and viewing angle improvement, then image display quality is improved, but device thickness increases and manufacturing complexity increases
Solution Approach 1:
The patent combines the prism sheet and polarizing plate into a single integrated complex substrate that includes both convex/concave light-guiding patterns and wire grid polarizing patterns formed on the same substrate. This merging eliminates the need for multiple separate optical members, reducing manufacturing steps and device thickness while maintaining the light control and viewing angle improvement functions of both original components
Solution Approach 2:
The complex substrate serves multiple functions simultaneously: it provides light guiding and viewing angle enhancement through the convex/concave patterns, while also providing polarization control through the wire grid patterns. This multi-functional design replaces what previously required separate specialized components, reducing overall device complexity and thickness
2Use of energy by moving object
If multiple separate optical members are used to achieve light control, then light transmission control is improved, but the number of components increases and thickness increases
Solution Approach 1:
The patent merges the light guiding function (prism sheet) and polarization control function (polarizing plate) into a single complex substrate with integrated patterns. This consolidation maintains effective light transmission control through both mechanisms while reducing the total thickness by eliminating the need for multiple stacked components
3Reliability
If conventional optical members are used, then light control function is achieved, but heat resistance is limited and luminance efficiency is reduced
Solution Approach 1:
The complex substrate is formed as an integrated structure combining the prism sheet material and polarizing plate material into a single composite component. This composite construction improves heat resistance by creating a more thermally stable integrated structure, and enhances luminance efficiency by reducing optical interfaces and improving light guidance through the combined patterns
4Illumination intensity
If multiple optical members are stacked to achieve light control, then optical function is improved, but manufacturing process complexity increases
Solution Approach 1:
The patent combines multiple optical functions into a single complex substrate that can be manufactured as one integrated component using unified patterning processes. This eliminates the need for separate manufacturing and assembly steps for multiple optical members, significantly simplifying the manufacturing process while maintaining improved optical performance
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 configuration reduces the overall thickness of the display apparatus while maintaining or improving luminance efficiency by effectively transmitting P-polarized light and reflecting S-polarized light, thereby enhancing image display quality and simplifying the manufacturing process.
Implementation Method 1
the wire grid pattern transmitting P polarized light, and reflecting S polarized light
Implementation Method 2
the planarizing layer having different refractivity from the lower base substrate
Data Source
AI summary
A complex substrate for a display apparatus, the complex substrate includes a lower base substrate including convex and concave patterns, the convex and concave patterns being integral with an upper side of the lower base substrate, a planarizing layer on the lower base substrate, the planarizing layer being integral with the convex and concave patterns, and the planarizing layer having different refractivity from the lower base substrate, and a wire grid pattern on the planarizing layer, the wire grid pattern including a plurality of nano wire metal patterns, each of the nano wire metal patterns having a width of no more than a micrometer.