Light Guide Plate Microstructure Layout for 3D Pattern Projection
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Solution Overview
Problem
Existing light source devices, particularly edge-lit devices, are limited to two-dimensional pattern effects and lack the capability to produce three-dimensional visual effects.
Innovation Solution
A light guide plate with rod-shaped microstructures arranged in specific patterns on its surface, where the microstructures' optical surfaces intersect the surface at boundary lines that pass through the center of the light-emitting element, allowing light beams to be reflected in varying directions based on their incident angles, creating stereoscopic visual effects by exploiting the spacing between human eyes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If traditional two-dimensional optical microstructures are used on the light guide plate, then the manufacturing process is simple, but the visual effect is limited to two-dimensional patterns without three-dimensional depth
Solution Approach 1:
The patent transitions from traditional two-dimensional flat patterns to three-dimensional visual effects by arranging rod-shaped microstructures with specific orientations. The optical surfaces of these microstructures intersect the first surface at boundary lines that pass through the center point of the light-emitting element, creating depth perception through controlled light reflection angles that simulate three-dimensional spatial relationships.
Solution Approach 2:
Different regions of the light guide plate have microstructures with locally optimized orientations. The boundary lines of optical surfaces are specifically oriented to pass through the center point of the light-emitting element, creating localized three-dimensional visual effects in different areas while maintaining overall pattern coherence.
2Shape
If multiple optical microstructure sets are arranged to create three-dimensional effects, then the stereoscopic visual effect is achieved, but the manufacturing precision requirement increases
Solution Approach 1:
The rod-shaped microstructures are arranged asymmetrically with respect to the light-emitting element center point. The boundary lines of their optical surfaces are specifically oriented to pass through this center point, creating controlled asymmetric light reflection patterns that generate three-dimensional visual effects while providing a clear geometric reference for manufacturing.
3Ease of manufacture
If the optical surfaces of rod-shaped microstructures are oriented with parallel boundary lines, then the manufacturing alignment is simplified, but the three-dimensional visual effect is reduced
Solution Approach 1:
The optical microstructures are divided into multiple sets, each set containing rod-shaped microstructures with boundary lines that are parallel to each other within the set (facilitating manufacturing alignment). However, different sets have boundary lines oriented at different angles, and the optical surfaces are not parallel between sets, creating the three-dimensional visual effect through this controlled segmentation and angular variation.
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 solution enables the display of three-dimensional patterns with a depth of field, enhancing visual experience by providing stereoscopic visual effects that change with viewing angles.
Implementation Method 1
allowing light beams to be reflected in varying directions based on their incident angles
Implementation Method 2
Each of the rod-shaped microstructures has an optical surface for guiding the light beam, and the optical surface intersects the first surface on a boundary line
Data Source
AI summary
A light guide plate and a light source device including the light guide plate are provided. The light guide plate has a light incident surface and a first surface. The first surface has multiple imaginary reference positioning lines extending along a first direction. At least one optical microstructure set is disposed on the first surface corresponding to each imaginary reference positioning line. Each optical microstructure set includes multiple rod-shaped microstructures, and some of the rod-shaped microstructures on multiple imaginary reference positioning lines on the first surface form a pattern microstructure group. When looking down at the first surface, a perpendicular bisector of a boundary line between each rod-shaped microstructure in the pattern microstructure group and the first surface all passes through a center point of a light-emitting surface of a light-emitting element in a light source.