Light Guide Plate Prism Arrangement for Sparkling Visual Effect
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Solution Overview
Problem
Existing light guide plate technologies fail to significantly change luminance when viewed from different positions, limiting the observer's experience of shiny patterns.
Innovation Solution
A light guide plate with prisms arranged in specific configurations on its surface to adjust the direction, inclination, and density of reflection surfaces based on the amount of light traveling to a predetermined viewpoint, creating spatially irregular brightness changes and a sparkling effect.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light guide plate techniques are used with uniform prism arrangements, then the structure is simple and easy to manufacture, but the luminance does not change significantly when viewed from different positions, limiting the observer's experience
Solution Approach 1:
The patent applies local quality by dividing the light guide plate into multiple regions (first region, second region, third region) with different prism configurations. Each region has prisms with specific orientation directions and density ratios tailored to local lighting requirements, creating spatially varying luminance characteristics that enhance observer presence while maintaining manufacturability through region-based patterning
Solution Approach 2:
The light guide plate is segmented into distinct functional regions with different prism arrangements. The first region has prisms oriented in a first direction, the second region has prisms oriented in a second direction different from the first, and the third region has varying prism densities. This segmentation allows each region to contribute differently to luminance variation, solving the contradiction between complexity and visual effect
2Illumination intensity
If prisms are arranged to create significant luminance changes for improving observer presence, then the visual effect is enhanced, but the manufacturing precision requirements increase
Solution Approach 1:
The patent changes key parameters including prism orientation directions (first direction, second direction), density ratios (first ratio, second ratio, third ratio), and regional distributions to create spatially varying luminance. These parameter variations are designed to achieve significant brightness changes for improved observer presence while remaining within manufacturable tolerances through systematic parameter selection
Solution Approach 2:
Different regions employ different prism parameters: the first region uses prisms oriented in a first direction with a first density ratio, the second region uses prisms oriented in a second direction with a second density ratio, and the third region uses prisms with a third density ratio. This local differentiation achieves bright luminance variation through parameter optimization rather than excessive precision requirements
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
Enhances the observer's experience by providing a more dynamic and engaging visual effect, improving the presence of the observer through spatially irregular brightness changes and a sparkling feeling.
Implementation Method 1
each of the plurality of prisms including a reflection surface that reflects the visible light, which is emitted from the light source and enters the light guide plate through the incoming surface, toward the other surface of the light guide plate
Data Source
AI summary
A light guide plate is transparent to visible light and is formed into a plate shape. The light guide plate includes a plurality of prisms 21 provided in a first region 22 on one surface 2b of the light guide plate, each of the plurality of prisms 21 including a reflection surface 21a that reflects the visible light, which is emitted from the light source 3 and enters the light guide plate 2 through an incoming surface 2a, toward the other surface 2c of the light guide plate 2. Then, for each of a plurality of first partial regions (22-1 to 22-n) in the first region 22, at least one of a direction of the reflection surface 21a of each prism 21 arranged in the first partial region and a ratio of a total of areas of the reflection surfaces 21a of each prism 21 to the first partial region is set according to an amount of light traveling from the first partial region toward a predetermined viewpoint such that brightness of the first region 22 changes spatially irregularly as seen from the predetermined viewpoint.