Inclined Micro-Structure Diffusion Plate for Display Uniformity
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Solution Overview
Problem
Conventional diffusion plates with light-emitting surfaces perpendicular to the viewing direction suffer from reduced uniformity of the diffused light field when installed at angles, leading to suboptimal display effects in limited spaces.
Innovation Solution
A display device featuring a diffusion plate with a substrate and micro-structure units on its surface, where the light source emits a diffused light beam with a chief ray inclined relative to the substrate, ensuring the diffused light field's center aligns with the chief ray, maintaining uniformity and adaptability in various installation scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the light-emitting surface of the diffusion plate is perpendicular to the viewing direction, then the structure is simple and easy to manufacture, but the installation space is limited and the display device cannot be adapted to various installation scenarios
Solution Approach 1:
The patent introduces asymmetric micro-structure units with inclined surface shape axes relative to the substrate. This asymmetric design allows the diffusion plate to maintain optimal light diffusion performance when the light-emitting surface is inclined at an angle to the viewing direction, thereby enabling adaptation to various installation scenarios without requiring the light-emitting surface to be perpendicular to the viewing direction.
Solution Approach 2:
The patent changes the geometric parameters of the micro-structure units, specifically setting the surface shape axis at a predetermined angle (5°-85°) relative to the normal direction of the substrate. This parameter change enables the diffusion plate to function effectively in inclined installations, expanding the range of installation angles while maintaining light diffusion quality.
2Adaptability or versatility
If the light-emitting surface of the diffusion plate is inclined at an angle to the viewing direction, then the installation space requirement is reduced, but the center of the diffused light field shifts greatly and the uniformity of the diffused light field is reduced
Solution Approach 1:
The patent applies local quality by designing micro-structure units with specific local geometric characteristics (inclined surface shape axes) that are optimized for inclined light emission. Each micro-structure unit is configured with its surface shape axis at a predetermined angle, creating localized optical properties that collectively maintain overall light field uniformity even when the entire diffusion plate is installed at an angle.
Solution Approach 2:
The diffusion plate is segmented into multiple micro-structure units, each independently configured with its own surface shape axis orientation. This segmentation allows each unit to handle light diffusion locally according to its specific orientation, and when collectively arranged, they maintain the overall uniformity of the diffused light field while accommodating inclined installation angles.
3Volume of moving object
If conventional diffusion plates are used with inclined installation, then the installation space is saved, but the display effect is deteriorated due to shifted light field center and reduced uniformity
Solution Approach 1:
The asymmetric micro-structure units with inclined surface shape axes are specifically designed to compensate for the effects of inclined installation. When the diffusion plate is installed at an angle, the asymmetric micro-structures redirect the light paths to maintain the center of the diffused light field aligned with the chief ray, thereby preserving display quality while enabling space-saving inclined installations.
Solution Approach 2:
By changing the geometric parameters of the micro-structure units (surface shape axis angle, height, width) to specific predetermined values, the patent optimizes the light diffusion characteristics for inclined installations. These parameter changes ensure that the diffused light field maintains its uniformity and correct center positioning even when the diffusion plate is installed at angles, thus preserving display effect quality while reducing installation space requirements.
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 provides a compact display device with excellent light diffusion performance, maintaining high uniformity of the diffused light field and flexibility in installation, ensuring the display effect is preserved even when the light-emitting surface is inclined relative to the viewing direction.
Implementation Method 1
As the light passes through the diffusion plate, refraction, reflection, and scattering in different directions occur, thereby changing the travel path of the light
Implementation Method 2
The main function of the diffusion plate is to sufficiently scatter incident light, thereby achieving a softer and more uniform illuminating effect
Implementation Method 3
As the light passes through the diffusion plate, refraction, reflection, and scattering in different directions occur, thereby changing the travel path of the light
Data Source
AI summary
Provided is a display device, which includes: a diffusion plate, where the diffusion plate includes: a substrate including a first surface and a second surface facing away from each other; and a micro-structure unit located on a side of the second surface of the substrate, where the micro-structure unit includes a third surface and a fourth surface facing away from each other, the third surface is connected to the second surface, and the fourth surface has a surface shape axis inclined relative to the first surface; and a light source located on a side of the first surface of the substrate, where the light source is configured to emit a light beam to be diffused to the micro-structure unit, and the light beam to be diffused passes through the micro-structure unit to form a diffused light field.