Segmented Light-Blocking Patterns for Display Color Purity
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Solution Overview
Problem
Current display devices face challenges in effectively mixing colors emitted from light-emitting elements and optical pattern layers, leading to reduced color purity and unwanted light leakage between pixels.
Innovation Solution
A display device design featuring a first substrate with light-emitting elements and a second substrate with optical patterns and light-blocking patterns, where the light-blocking patterns include a main pattern between adjacent optical patterns and a subsidiary pattern on the optical patterns, preventing light mixing and maintaining a gap to prevent contact during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If light-blocking patterns are disposed between adjacent optical patterns, then color purity is improved by preventing light leakage, but device complexity increases due to additional structural components
Solution Approach 1:
The light-blocking structure is segmented into two distinct components: main light-blocking patterns disposed between adjacent optical patterns to prevent light leakage, and subsidiary light-blocking patterns disposed on the optical patterns. This segmentation allows each component to perform its specific function optimally while maintaining overall color purity.
Solution Approach 2:
Different regions of the light-blocking structure are assigned different properties: the main light-blocking patterns have greater thickness for blocking light between pixels, while the subsidiary light-blocking patterns have smaller thickness to allow some light transmission for color mixing. This local differentiation resolves the contradiction by optimizing each region for its specific purpose.
2Manufacturing precision
If subsidiary light-blocking patterns with smaller thickness are disposed on optical patterns, then color mixture is improved, but light leakage prevention capability deteriorates
Solution Approach 1:
The light-blocking function is segmented between main patterns (for leakage prevention) and subsidiary patterns (for color mixture). The main patterns are positioned between optical patterns with greater thickness to block leakage, while subsidiary patterns are positioned on optical patterns with smaller thickness to enable color mixture, thus resolving the contradiction through functional segmentation.
Solution Approach 2:
The light-blocking structure exhibits local quality variations: regions between optical patterns have high blocking capability (main patterns with greater thickness), while regions on optical patterns have lower blocking capability (subsidiary patterns with smaller thickness). This spatial differentiation allows simultaneous achievement of light leakage prevention and color mixture improvement.
3Reliability
If main light-blocking patterns protrude from optical pattern surface, then gap maintenance is improved to prevent contact, but manufacturing complexity increases
Solution Approach 1:
The main light-blocking patterns are formed to protrude from the optical pattern surface in advance, creating a built-in mechanical stop that maintains the required gap between substrates during assembly. This preliminary structural preparation prevents contact between substrates without requiring complex external fixtures or assembly procedures.
Solution Approach 2:
The protruding main light-blocking patterns serve as self-contained spacers that automatically maintain the gap between substrates during assembly. The structure performs its own spacing function without requiring additional components or complex manufacturing processes, thus improving reliability while maintaining ease of manufacture.
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
Improves color mixture and maintains the integrity of each pixel's color purity by blocking unwanted light leakage and preventing damage during assembly, ensuring effective light transmission and shock resistance.
Implementation Method 1
light-blocking patterns are disposed on the second substrate... configured to fill spaces therebetween... blocking unwanted light leakage
Data Source
AI summary
A display device that includes a plurality of pixels arranged in a row direction and a column direction crossing the row direction. The display device includes a first substrate including light-emitting elements each disposed in the respective pixels. A second substrate faces the first substrate. A plurality of optical patterns are disposed on the second substrate in pixel columns, respectively, and extend along the column direction. Light-blocking patterns are disposed on the second substrate. The light-blocking patterns include a main light-blocking pattern extending along pixel column boundaries and fill spaces between adjacent optical patterns, and a subsidiary light-blocking pattern disposed on the optical patterns at pixel row boundaries and having a thickness smaller than a thickness of the main light-blocking pattern.