Dual Light Guide Plate Air Layer for Uniform Display Illumination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display devices face challenges in achieving uniform light distribution due to inadequate total reflection and light condensing capabilities of light guide plates, which affect the overall brightness and clarity of the display panel.
Innovation Solution
The implementation of a dual light guide plate system with non-overlapping optical patterns and an air layer between the plates, along with a color conversion layer and sealing portions, enhances total reflection and light condensing capabilities, ensuring uniform light distribution to the display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single light guide plate is used, then the structure is simple, but the total reflection capability and light condensing capability are insufficient
Solution Approach 1:
The light guide plate is divided into multiple separate light guide plates (first light guide plate and second light guide plate) arranged in sequence. Each plate has optical patterns on its light-exiting surface, and they work together to achieve better light distribution and reflection than a single plate could provide.
2Reliability
If optical patterns are placed on light guide plates, then light condensing capability improves, but light distribution uniformity deteriorates due to overlapping patterns
Solution Approach 1:
Different regions of the light guide plates have different optical patterns designed for specific functions. The first light guide plate has patterns optimized for one aspect of light control, while the second light guide plate has patterns optimized for complementary light control, achieving both condensing and uniformity.
Solution Approach 2:
Instead of placing all optical patterns on a single plane (one light guide plate), the invention distributes patterns across multiple stacked light guide plates. This adds a vertical dimension to the optical pattern arrangement, allowing patterns to be positioned at different depths to achieve both light condensing and uniform distribution.
3Reliability
If multiple light guide plates are used with air layer, then total reflection capability improves, but device complexity increases
Solution Approach 1:
An air layer is introduced between the first and second light guide plates as an intermediary medium. This air layer acts as a low refractive index material that enhances total internal reflection at the interfaces, improving light guidance capability without requiring complex optical coatings or structures.
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 improves the total reflection and light condensing capabilities of the light guide plates, providing uniform light to the display panel and simplifying the manufacturing process by potentially omitting the low refractive index layer, while preventing moisture penetration into the color conversion layer.
Implementation Method 1
a first light guide plate and a second light guide plate between the first light guide plate and the display panel... An air layer may be positioned in a space surrounded by the first light guide plate, the second light guide plate, and the sealing portion
Data Source
AI summary
A display device includes: a first light guide plate and a display panel disposed along a first direction; a second light guide plate between the first light guide plate and the display panel to be spaced apart from the first light guide plate; a light source at at least one of one side of the first light guide plate and one side of the second light guide plate; at least one first optical pattern on one of surfaces of the first light guide plate that face each other along the first direction; and at least one second optical pattern on one of surfaces of the second light guide plate that face each other along the first direction, wherein the first optical pattern and the second optical pattern do not overlap each other.