Light-Emitting Substrate Layout for Uniform In-Plane Luminance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing light-emitting devices face challenges in achieving uniform in-plane luminance due to reduced light diffusion from fewer light sources, leading to luminance unevenness and color deviation in display and lighting applications.
Innovation Solution
Incorporating a main substrate with high-reflection members on the peripheral part and using lenses of different shapes corresponding to light sources to optimize light distribution, ensuring higher reflectance and improved optical effects for uniform light emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the number of light sources is reduced to thin the display apparatus and reduce components, then the device complexity and thickness are reduced, but the light diffusion becomes insufficient causing in-plane luminance unevenness
Solution Approach 1:
The patent applies local quality by differentiating the optical properties of different regions on the substrate. The peripheral part of the substrate is designed with higher reflectance compared to the central part, creating localized optical characteristics that redirect light from reduced light sources to peripheral areas, thereby achieving uniform luminance distribution across the entire display surface despite having fewer light sources
Solution Approach 2:
The patent introduces a new dimension of light control by utilizing the substrate's reflectance properties in the optical path. By modifying the peripheral region's reflectance characteristics, the system redirects light that would otherwise be lost or concentrated in the center, effectively using the substrate's spatial structure as an additional light distribution mechanism
2Device complexity
If the number of light sources is reduced, then the device complexity is reduced, but color deviation occurs in the emission surface
Solution Approach 1:
The patent addresses color uniformity by applying local quality principles to the substrate's optical properties. The peripheral region is engineered with enhanced reflectance to compensate for color imbalances that arise from reduced light sources, ensuring that chromatic characteristics remain consistent across the entire emission surface
3Illumination intensity
If lenses of different shapes are used to correspond to different light sources, then the in-plane luminance deviation is alleviated, but the device complexity increases
Solution Approach 1:
The patent applies local quality by assigning different lens shapes to different regions of the light source array. Specific lenses are designed with unique optical characteristics tailored to their positional requirements, enabling precise control over light distribution patterns to achieve uniform luminance across the display surface
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 effectively reduces luminance unevenness and color deviation, enabling more homogeneous illumination and improved display performance with fewer light sources, enhancing both display and lighting applications.
Implementation Method 1
One or more light reflection members are each disposed on the peripheral part. The light reflection members each have reflectance that is higher than the reflectance of the main substrate.
Implementation Method 2
The plurality of lenses apply optical effects to beams of light from the plurality of light sources respectively.
Data Source
AI summary
Provided is a light-emitting device with reduced in-plane luminance variation. The light-emitting device includes a main substrate, a plurality of light sources, a plurality of lenses, and one or more light reflection members. The main substrate includes a central part and a peripheral part that surrounds the central part. The plurality of light sources are each disposed on the central part of the main substrate. The plurality of lenses are disposed to correspond to the plurality of light sources respectively. The plurality of lenses apply optical effects to beams of light from the plurality of light sources respectively. One or more light reflection members are each disposed on the peripheral part. The light reflection members each have reflectance that is higher than the reflectance of the main substrate.