Laminated Light Diffusion Control Member for Uniform Reflective Display Brightness
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Solution Overview
Problem
Reflective display bodies, such as smartphones and tablets, face issues with visibility when the up-down direction of display content is changed, as existing light diffusion control layers do not adequately diffuse light across different orientations, leading to uneven brightness and reduced visibility.
Innovation Solution
A light diffusion control member comprising two laminated layers with a regular internal structure, where regions of high refractive index extend from one surface to the other, tilted with respect to the thickness direction, and the layers are oriented such that the angle between their vectors is between 0° and 90°, ensuring uniform light diffusion and reflection across different orientations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light diffusion control layer is incorporated to improve visibility and diffuse light, then light diffusion capability is improved, but light loss due to stray light or backscattering increases, impairing image clarity
Solution Approach 1:
The patent changes the geometric parameters of the light diffusion control layer by introducing a specific inclination angle (α) for the high refractive index regions relative to the thickness direction. This parameter optimization allows the layer to diffuse light effectively while controlling the diffusion direction to minimize backscattering and stray light, thus reducing light loss while maintaining good visibility
Solution Approach 2:
The patent uses a composite structure combining regions with different refractive indices (high refractive index regions embedded in a low refractive index matrix). This composite material approach enables selective light diffusion in specific directions while maintaining overall light transmission efficiency, balancing diffusion capability with light loss reduction
2Illumination intensity
If a light diffusion control layer is added to achieve uniform light diffusion, then visibility is improved, but device complexity increases
Solution Approach 1:
The patent segments the light diffusion control layer into distinct high refractive index regions arranged at specific inclinations within the layer. This segmentation creates controlled light diffusion paths without requiring multiple separate layers or complex assemblies, achieving uniform visibility improvement while keeping the overall structure relatively simple
Solution Approach 2:
The patent introduces a new dimensional parameter - the inclination angle (α) of the high refractive index regions relative to the thickness direction. This angular dimensionality allows the single layer to perform multiple functions (diffusion, direction control) that would otherwise require multiple layers, thereby improving visibility without proportionally increasing device complexity
3Stability of the object's composition
If the light diffusion control layer is configured with tilted high refractive index regions, then light diffusion uniformity across orientations is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent specifies a range for the inclination angle (α) rather than a single precise value, allowing manufacturing flexibility. By optimizing this parameter within a reasonable range, the patent achieves good light diffusion uniformity across different orientations while avoiding excessively tight tolerance requirements that would make manufacturing difficult
Solution Approach 2:
The patent applies local quality by creating regions with high refractive index that are tilted at angle (α) specifically in the light diffusion control layer, while other layers and components maintain their conventional structures. This localized structural modification achieves improved light diffusion uniformity without requiring precision modifications throughout the entire device
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 configuration ensures excellent visibility and uniform brightness regardless of the up-down direction of display content, effectively diffusing and reflecting light to maintain consistent illumination, even when the device is rotated.
Implementation Method 1
a light diffusion control layer that can transmit and diffuse the incident light within a predetermined incident angle range
Implementation Method 2
light from these light sources is reflected by the reflective layer into reflected light
Data Source
AI summary
A light diffusion control member includes a first light diffusion control layer and a second light diffusion control layer. The first light diffusion control layer and the second light diffusion control layer each has a regular internal structure that includes a plurality of regions having a relatively high refractive index in a region having a relatively low refractive index. The first light diffusion control layer and the second light diffusion control layer are laminated so that an angle between two respective vectors determined based on the regular internal structure in the first light diffusion control layer and the second light diffusion control layer is more than 0° and 90° or less.