Light Guide Plate Asymmetric Pattern Design for LCD Uniformity
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional light guide plates in LCDs suffer from non-uniform light distribution and dot visibility issues due to the alignment of patterns on the reflective section, which affects the display quality.
Innovation Solution
A light guide plate design featuring first patterns on the exit section to maximize light distribution perpendicular to the exit section and second patterns on the reflective section with varying intervals to scatter light, reducing dot visibility and enhancing uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If patterns are aligned uniformly on the reflective section, then manufacturing is simplified, but dot visibility occurs and display quality deteriorates
Solution Approach 1:
The patent applies asymmetry by making the interval between adjacent second patterns different in the first direction (parallel to exit section) compared to the second direction (perpendicular to exit section). Specifically, the interval in the first direction is set to 1/2 to 1/5 of the interval in the second direction, creating an asymmetric pattern arrangement that eliminates dot visibility while maintaining manufacturing feasibility through printing processes.
2Illumination intensity
If light distribution is concentrated perpendicular to the exit section, then brightness is improved, but light uniformity across the display panel deteriorates
Solution Approach 1:
The patent applies local quality by creating different pattern configurations in different regions and directions of the reflective section. First patterns are arranged with uniform intervals in the second direction to maximize perpendicular light output for brightness, while the asymmetric interval arrangement (different intervals in first vs. second directions) ensures uniform light distribution across the entire display panel area, with each region receiving appropriate light scattering based on its position.
3Object-affected harmful factors
If second patterns are printed with large intervals in both directions, then dot visibility is reduced, but light scattering efficiency and brightness deteriorate
Solution Approach 1:
The patent resolves this contradiction by using asymmetric interval ratios between the first and second directions. The interval in the first direction is optimized to be 1/2 to 1/5 of the interval in the second direction, which prevents dot visibility while maintaining effective light scattering. This asymmetric configuration allows patterns to be spaced appropriately in each direction to balance dot visibility reduction with brightness maintenance, rather than using uniformly large intervals in both directions.
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 design improves light uniformity and reduces dot visibility, leading to enhanced display quality by optimizing the alignment and intervals of patterns on the light guide plate.
Implementation Method 1
a plurality of first patterns are formed on the exit section... to distribute the exit light with maximum brightness in a direction perpendicular to the exit section
Implementation Method 2
a plurality of second patterns are formed on the reflective section to scatter the incident light
Data Source
AI summary
A light guide plate includes an incident surface receiving incident light from a light source, an exit section that outputs exit light having a light distribution different from a light distribution of the incident light and a reflective section opposite to the exit section. A plurality of first patterns are formed on the exit section while being arranged in a first direction of the exit section to distribute the exit light with maximum brightness in a direction perpendicular to the exit section. A plurality of second patterns are formed on the reflective section to scatter the incident light.