Variable Cross-Section Light Guide Elements for 3D Display Brightness
Solution Overview
Problem
Current 3D display technologies using parallax barriers suffer from brightness uniformity issues due to varying light paths in light guide plates, leading to a deteriorated 3D display effect.
Innovation Solution
The cross-sectional area of light guide elements in the light guide plate is adjusted based on their distance from the light incident surface to ensure uniform light distribution, with larger areas farther from the incident surface, enhancing brightness uniformity and 3D display quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light guide elements with uniform cross-sectional area are used, then the structure is simple and easy to manufacture, but the brightness uniformity deteriorates due to varying light paths from the incident surface to each element
Solution Approach 1:
The patent applies local quality by varying the cross-sectional area of light guide elements based on their position. Elements closer to the light incident surface have smaller cross-sectional areas, while elements farther away have larger areas. This local variation compensates for the different light path lengths, ensuring uniform brightness across the display surface.
Solution Approach 2:
The patent changes the geometric parameter (cross-sectional area) of light guide elements as a function of position. By adjusting this parameter according to distance from the incident surface, the system achieves uniform light distribution while maintaining manufacturing feasibility through systematic design.
2Illumination intensity
If light guide elements with larger cross-sectional areas are used farther from the incident surface, then brightness uniformity improves, but the manufacturing complexity increases
Solution Approach 1:
The patent implements local quality by making each light guide element's cross-sectional area specific to its position. This localized adaptation ensures that elements receiving less light (those farther from the incident surface) have larger areas to compensate, achieving uniform brightness without requiring complex control systems.
Solution Approach 2:
The patent introduces dimensional variation in the cross-sectional area of light guide elements. Instead of uniform one-dimensional structures, the elements have variable two-dimensional cross-sections that change along the length of the light guide plate, adding a geometric dimension to solve the light distribution problem.
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 adjustment significantly improves light uniformity, increasing it by 34% compared to conventional systems, resulting in a more effective 3D display experience.
Implementation Method 1
the light is guided by the plurality of light guide elements and emitted from one of the first and the second lateral surfaces of the light guide plate
Data Source
AI summary
A display apparatus comprising a display panel and a light module is provided. The light module comprises a light guide plate, a plurality of light guide elements and at least a light emitting unit. The light guide plate comprises at least one light incident surface, a first lateral surface and a second lateral surface opposite to the first lateral surface. The plurality of light guide elements are disposed at the first lateral surfaces. A plurality of cross-section parallel to the first light incident surface in the plurality of light guide elements. The farther the distance from the cross-section to the first light incident surface, the larger the area of the cross-section. After emitting from the light emitting unit, the light is guided by the plurality of light guide elements, and emitted from one of the first and the second lateral surfaces of the light guide plate.