Reflective Display Light Diffusion Control Layer Brightness Consistency
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Solution Overview
Problem
Reflective display bodies with the ability to change the up-down direction of display content experience significant brightness variations, causing discomfort to users due to inadequate light diffusion control.
Innovation Solution
A reflective display body incorporating a light diffusion control layer with a diffusion angle width of 5° to 80° and an acute angle of 7° to 83°, featuring a regular internal structure with high and low refractive index regions, and a roll body of a light diffusion control sheet with similar optical characteristics, to maintain consistent brightness across orientation changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a general light diffusion plate is incorporated into the reflective display body, then the light diffusion capability is improved, but light loss due to stray light or backscattering increases, impairing image clarity
Solution Approach 1:
The patent applies parameter changes by precisely controlling the refractive index difference between the resin matrix and dispersed particles, and by optimizing the particle size distribution within specific ranges. These parameter adjustments enable the light diffusion plate to achieve effective light diffusion while minimizing stray light and backscattering losses, thus resolving the contradiction between diffusion capability and light loss.
Solution Approach 2:
The patent uses composite materials by combining a transparent resin matrix with specifically selected dispersed particles having different refractive indices. This composite structure enables the light diffusion plate to simultaneously achieve good light transmission, effective diffusion, and minimal energy loss through optimized material composition and particle distribution.
2Adaptability or versatility
If the up-down direction of display content is changed in a reflective display body with a light diffusion control layer, then the display can adapt to different orientations, but brightness varies significantly, causing discomfort to users
Solution Approach 1:
The patent applies asymmetry by designing the light diffusion plate with non-uniform particle distribution and asymmetric refractive index profiling. This asymmetric structure compensates for the brightness variations that occur when the display orientation changes, maintaining consistent perceived brightness across different viewing orientations while enabling orientation adaptability.
3Illumination intensity
If high diffusion is attempted to achieve good visibility, then the light diffusion capability is improved, but light loss due to stray light or backscattering occurs, impairing image clarity
Solution Approach 1:
The patent applies local quality by creating zones with different particle concentrations and refractive index variations within the light diffusion plate. Areas closer to the display surface have different optical properties than deeper regions, enabling effective light diffusion for visibility while controlling stray light generation to maintain image clarity through localized optical property optimization.
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 ensures minimal brightness variation and comfortable viewing experiences even when the up-down direction of the display content is changed, while efficiently producing the reflective display body using the roll body of the light diffusion control sheet.
Implementation Method 1
the light diffusion control layer having a diffusion angle width of 5° or more and 80° or less in which a haze value (%) is 90% or more as measured when one surface of the light diffusion control layer is irradiated with light rays at an incident angle of −70° to 70°
Implementation Method 2
a light diffusion control layer that can transmit and diffuse the incident light within a predetermined incident angle range
Implementation Method 3
light from these light sources is reflected by the reflective layer into reflected light, which enables good visibility of the display
Data Source
AI summary
A reflective display body configured such that the up-down direction of display content on a display surface can be changed. The reflective display body includes a light diffusion control layer, a display device, and a reflective layer. The light diffusion control layer has a diffusion angle width of 5° or more and 80° or less in which a haze value (%) is 90% or more as measured when one surface of the light diffusion control layer is irradiated with light rays at an incident angle of −70° to 70° with respect to the normal direction of the one surface being 0°. The light diffusion control layer has an acute angle of 7° or more and 83° or less.