Surface Light Emitting Apparatus Uniformity via Spacer
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Solution Overview
Problem
Surface emitting apparatuses experience intensity unevenness, known as 'eyeball,' due to uneven light distribution near LED lamps, leading to an unattractive appearance and increased production costs when trying to mitigate this issue.
Innovation Solution
A surface emitting apparatus design featuring a light guide plate with a diffusing member and a spacer member that creates a space between the light emitting surface and the diffusing member, larger than the light guide plate's thickness, to mix and diffuse light uniformly, preventing intensity unevenness and reducing the need for additional light sources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of light sources is increased to reduce intensity unevenness, then the uniformity of light distribution is improved, but the production cost increases and heat radiation becomes more problematic
Solution Approach 1:
A diffusing member is introduced as an intermediary component between the light guide plate and the external environment. This diffusing member has a specific distance relationship with the light emitting surface (distance greater than light guide plate thickness) that enables it to effectively scatter and redistribute light, achieving uniform light distribution without requiring additional light sources
Solution Approach 2:
The invention changes the spatial parameter by establishing a specific distance relationship between the diffusing member and the light emitting surface. The distance is set to be greater than the thickness of the light guide plate, which optimizes the light diffusion effect and achieves uniform illumination while maintaining a simple light source configuration
2Manufacturing precision
If a cover is provided to conceal the light guide plate area near LED lamps, then the appearance is improved, but the frame length increases and the overall appearance becomes unattractive
Solution Approach 1:
The diffusing member serves as a mediator that eliminates the need for a cover by directly addressing the root cause of intensity unevenness. By positioning the diffusing member at an optimized distance from the light emitting surface, uniform light distribution is achieved across the entire light guide plate, including areas near LED lamps, thereby eliminating the need for concealing covers and maintaining a compact frame design
Solution Approach 2:
By changing the spatial parameter (distance between diffusing member and light emitting surface to be greater than light guide plate thickness), the invention achieves uniform light distribution that eliminates the need for additional covering structures, thereby maintaining a compact and aesthetically pleasing frame length
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
This design prevents intensity unevenness, improves the appearance by minimizing the frame's extension, and reduces production costs by not requiring more light sources, while also allowing for effective heat radiation and preventing color unevenness.
Implementation Method 1
a light guide plate (3) having an end surface and a light emitting surface and allowing light incident on the end surface to be emitted from the light emitting surface
Implementation Method 2
a diffusing member provided on a light emitting surface side of the light guide plate
Data Source
AI summary
A surface emitting apparatus includes a light guide plate, a plurality of point light sources, a diffusing member, and a spacer member. The light guide plate has an end surface and a light emitting surface and is configured to allow light incident on the end surface to be emitted from the light emitting surface. The plurality of point light sources is provided to oppose the end surface of the light guide plate. The diffusing member is provided on a light emitting surface side of the light guide plate. The spacer member defines a space between the light emitting surface and the diffusing member such that a distance between the light emitting surface and the diffusing member is larger than a thickness of the light guide plate.