Light Emitting Module with Reflecting Member for Uniform Illumination
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Solution Overview
Problem
Light emitting modules with sectioned light guide members experience luminance decline along boundaries due to the sectioning groove, leading to uneven lighting in applications like liquid crystal display backlights.
Innovation Solution
A light emitting module design featuring a light guide member with first and second guide parts and light reflecting members, where the distance between the lateral faces of adjacent parts is optimized to reduce luminance decline by facilitating light propagation between compartments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light guide member is sectioned by a sectioning groove into multiple regions, then lighting control per region is enabled, but luminance decline occurs along the boundaries between adjacent light guide parts
Solution Approach 1:
A light reflecting member is introduced as an intermediary between adjacent light guide parts. This reflecting member has a light-reflecting surface that faces the light-emitting surface, and it reflects light from the light source toward the light-emitting surface, thereby compensating for luminance decline at the boundaries without interfering with the regional lighting control function
Solution Approach 2:
The light reflecting member is positioned specifically at the boundary regions between adjacent light guide parts, where luminance decline occurs. By applying the reflective function locally at these boundary areas rather than uniformly across the entire light guide member, the invention addresses the luminance non-uniformity problem while preserving the sectioning groove's regional control capability
2Illumination intensity
If the distance between lateral faces of adjacent light guide parts is reduced, then light propagation between compartments is facilitated, but the sectioning groove structure is compromised
Solution Approach 1:
The light reflecting member serves as a mediator that enables effective light propagation between compartments without requiring the lateral faces to be in direct proximity. The reflecting member captures and redirects light across the boundary, maintaining the sectioning groove's structural integrity while achieving efficient light distribution
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 design effectively minimizes luminance decline at the boundaries between adjacent light guide parts, enhancing uniformity and efficiency of light distribution in planar light sources.
Implementation Method 1
a light reflecting member disposed between the first lateral faces and the second lateral faces... a light-reflecting surface of the light reflecting member facing the light-emitting surface
Data Source
AI summary
A light emitting module includes: a light source part including a first light source and a second light source; a light guide member including: a first light guide part having a 1st A principal face, a 1st B principal face located opposite to the 1st A principal face, a first lateral face positioned between the 1st A principal face and the 1st B principal face, and a first hole in which the first light source is disposed; and a second light guide part having a 2nd A principal face, a 2nd B principal face located opposite to the 2nd A principal face, a second lateral face positioned between the 2nd A principal face and the 2nd B principal face, the second lateral face facing the first lateral face, and a second hole in which the second light source is disposed.