Light Guide Structure Micro-Structures Brightness
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Solution Overview
Problem
The light guide structure in electronic devices such as tablets and vehicle panels faces challenges in increasing light scattering efficiency, which affects the brightness of dark areas and overall light extraction.
Innovation Solution
Incorporating micro-structures or rounded edges into the light guide structure, which are configured to scatter light, enhancing the light extraction efficiency and compensating for brightness in dark areas.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If conventional light guide structure is used, then the structure is simple, but the light scattering efficiency is insufficient and dark areas have low brightness
Solution Approach 1:
The light guide structure is segmented by introducing multiple types of micro-structures (first micro-structures and second micro-structures with different shapes) on the surface. This segmentation creates varied light scattering paths that improve brightness distribution without requiring complete structural redesign
Solution Approach 2:
The patent transitions from a conventional planar surface to a multi-dimensional micro-structured surface by adding micro-structures with different shapes (e.g., columns, cones, pyramids) at different positions. This dimensional change enables enhanced light scattering efficiency and improved brightness in dark areas
2Illumination intensity
If light scattering efficiency is increased through micro-structures, then brightness of dark areas improves, but manufacturing complexity increases
Solution Approach 1:
Different micro-structures are selectively positioned in different regions of the light guide plate according to local light distribution requirements. First micro-structures are placed in certain areas while second micro-structures are placed in other areas, optimizing light scattering locally where needed most
Solution Approach 2:
The patent varies parameters of micro-structures including shape, size, density, and material composition to optimize light scattering efficiency. By adjusting these parameters, the structure achieves improved light extraction without requiring fundamentally complex manufacturing processes
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 implementation of micro-structures and/or rounded edges increases the brightness of dark areas by up to 21% and improves light extraction efficiency, effectively addressing the challenge of light scattering in the light guide structure.
Implementation Method 1
The micro-structures are disposed on the non-light-emitting surfaces and are configured to scatter the light
Data Source
AI summary
A light guide structure includes a light guide plate, a light emitting unit, and a plurality of micro-structures. The light guide plate has a light incident surface, a plurality of non-light-emitting surfaces, a reflective surface, and a light emitting surface. The light incident surface and one of the non-light-emitting surfaces are oppositely disposed, and the reflective surface and the light emitting surface are oppositely disposed. The light emitting unit is configured to emit light through the light incident surface. The micro-structures are disposed on the non-light-emitting surfaces and are configured to scatter the light.