Backlight Module Light Guide With Through Holes and Reflectors
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Solution Overview
Problem
Current backlight modules for electronic devices suffer from issues such as halo phenomena and poor light output efficiency, which affect display quality.
Innovation Solution
A backlight module design featuring a substrate with light emitting elements, a light guide device with through holes exposing these elements, and reflective elements overlapping the holes to create a uniform collimated light source, improving light output efficiency and reducing halos.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional backlight modules are used, then the structure is simple, but the display quality deteriorates due to halo phenomena and poor light output efficiency
Solution Approach 1:
The light guide device is divided into multiple light guide portions, each corresponding to a light emitting element. Each light guide portion includes a light guide body with a first through hole and a reflective element disposed in the through hole. This segmentation allows independent optimization of each light guide portion to improve light output efficiency and eliminate halo phenomena while maintaining manageable structural complexity.
Solution Approach 2:
Reflective elements are selectively disposed in the first through holes of the light guide portions, creating local reflective properties at specific positions. This local quality enhancement directs light more effectively from each light emitting element through its corresponding light guide portion, improving overall display quality without requiring uniform complexity throughout the entire structure.
2Productivity
If light output efficiency is improved by adding reflective elements and through holes, then display quality enhances, but the device complexity increases
Solution Approach 1:
The reflective element is merged with the light guide portion structure, where the reflective element is disposed within the first through hole of the light guide body. This merging approach combines the light guiding function and the reflective function into a single integrated component, improving light output efficiency while avoiding the need for separate reflective structures that would increase complexity.
Solution Approach 2:
The light guide portion serves multiple functions: it guides light from the light emitting element, provides a through hole for light emission, and incorporates a reflective element to redirect light. This multi-functionality allows a single component to achieve multiple objectives, improving productivity without proportionally increasing device complexity.
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 enhances light output efficiency and minimizes halo effects, resulting in improved display quality by guiding light effectively through the light guide device and reflective elements.
Implementation Method 1
a plurality of reflective elements respectively disposed on the light emitting elements, wherein, in a normal direction of the substrate, the reflective elements respectively overlap with the first through holes of the light guide portions
Data Source
AI summary
A backlight module includes a substrate, a plurality of light emitting elements, a light guide device and a plurality of reflective elements. The light emitting elements are arranged on the substrate. The light guide device includes a plurality of light guide portions arranged to respectively correspond to the light emitting elements, wherein each of the light guide portions is provided with a first through hole, and the first through holes of the light guide portions respectively expose the light emitting elements. The reflective elements are respectively arranged on the light emitting elements, wherein, in a normal direction of the substrate, the reflective elements respectively overlap with the first through holes of the light guide portions.