Light Diffusion Control Body for Reflective Display Visibility
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Solution Overview
Problem
Conventional reflective display bodies face challenges in achieving high visibility due to insufficient light diffusion, leading to poor image clarity and brightness, especially when the light source position varies, as they rely on external illumination.
Innovation Solution
A light diffusion control body comprising at least two layers with a regular internal structure, featuring regions of high and low refractive indices, designed to diffuse incident light within a specific angle range with minimal light loss, enhancing visibility by effectively utilizing oblique light rays and maintaining image clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a general light diffusion plate is incorporated into the reflective display body, then the visibility is improved by diffusing light, but light loss due to stray light or backscattering occurs to impair image clarity
Solution Approach 1:
The patent applies parameter changes by precisely controlling the haze value of the light diffusion control body within the range of 20% to 40%. This specific parameter range optimizes the balance between light diffusion for visibility and minimizing light loss, resolving the technical contradiction between improving visibility and reducing light loss.
Solution Approach 2:
The patent applies local quality by positioning the light diffusion control body at a specific location within the display structure, between the reflective plate and the liquid crystal panel. This localized placement ensures that light diffusion occurs only where needed, improving visibility without causing excessive light loss throughout the entire system.
2Illumination intensity
If the diffusivity is increased to achieve good visibility, then the visibility is improved, but light loss due to stray light or backscattering occurs to impair image clarity
Solution Approach 1:
The patent applies parameter changes by controlling the haze value within the optimized range of 20% to 40%, which provides sufficient light diffusion for good visibility while preventing excessive diffusion that would cause stray light and backscattering, thereby maintaining image clarity.
3Illumination intensity
If conventional light diffusion control bodies are used, then the display can be illuminated, but the visibility is insufficient under adverse lighting conditions or when light source position varies
Solution Approach 1:
The patent applies parameter changes by optimizing the haze value to 20%-40%, which enhances the display's adaptability to various lighting conditions. This parameter optimization ensures that the display maintains good visibility whether the light source is positioned directly or obliquely, and under both normal and adverse lighting environments.
Solution Approach 2:
The patent applies dynamics by enabling the light diffusion control body to effectively handle variable incident angles of light. The optimized haze value allows the structure to dynamically adapt to different light source positions, maintaining consistent visibility performance across varying lighting conditions.
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 significantly improves visibility in reflective display bodies by moderately diffusing light, ensuring brighter and clearer displays even under adverse lighting conditions, while minimizing light loss and maintaining image clarity.
Implementation Method 1
a light diffusion control body comprising at least two light diffusion control layers each having a regular internal structure, the regular internal structure comprising a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index
Data Source
AI summary
A light diffusion control body includes at least two light diffusion control layers each having a regular internal structure. The regular internal structure includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The at least two light diffusion control layers includes a first light diffusion control layer and a second light diffusion control layer each having a minimum value of a haze value of 35% or more. The haze value is measured when one surface of each of the first light diffusion control layer and the second light diffusion control layer is irradiated sequentially with a light ray at an incident angle of −70° to 70° with respect to the normal direction of the surface being 0°.