Parabolic Mirror Incident Angle Control for Uniform Whole-Circumference Display
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Solution Overview
Problem
Current image display technologies for whole circumference screens struggle to provide high-quality images due to issues with incident angle control and uniformity, leading to uneven luminance and color issues.
Innovation Solution
An image display device with an emission portion, an optical portion, and an irradiation target, where the optical portion controls the incident angle of image light emitted from the emission portion, ensuring it is radiated to the irradiation target at substantially fixed angles using a reflection surface with a parabolic shape, allowing for high-quality image projection on a cylindrical or hologram screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If projection light is emitted from below the whole circumference screen and reflected by a rotation body reflection mirror, then the video can be displayed three-dimensionally on the whole circumference screen, but the incident angle of the light on the screen varies and causes uneven luminance and color
Solution Approach 1:
The patent employs a rotation body reflection mirror with a specific curved surface shape (paraboloid of revolution) to control the incident angle of projection light on the whole circumference screen. The curved surface is designed to reflect light at substantially constant angles regardless of the light's emission direction, thereby achieving uniform luminance and color across the screen while maintaining the three-dimensional display capability.
2Device complexity
If the incident angle of image light on the irradiation target is not controlled, then the optical system is simpler, but the luminance and color uniformity deteriorates
Solution Approach 1:
The rotation body reflection mirror is designed with a paraboloid of revolution surface that inherently controls the incident angle of reflected light. This geometric shape ensures that light rays reflected from the mirror strike the whole circumference screen at substantially constant angles, achieving uniform luminance and color without requiring complex additional optical control mechanisms.
Solution Approach 2:
The patent changes the geometric parameters of the reflection mirror (specifically using a paraboloid of revolution with appropriate focal length and curvature) to control the incident angle of reflected light. By optimizing these geometric parameters, the system achieves uniform luminance and color across the screen while keeping the overall device structure relatively simple.
3Manufacturing precision
If complex signal correction is used to compensate for uneven luminance and color, then the image quality can be improved, but the system complexity and manufacturing cost increase
Solution Approach 1:
Instead of using complex signal correction to compensate for luminance and color unevenness, the patent converts the optical path design into a benefit by using a rotation body reflection mirror with a specifically shaped surface. This mirror design inherently ensures uniform incident angles, thereby achieving uniform luminance and color directly at the optical level, eliminating the need for complex signal processing corrections.
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 enables the display of high-quality, uniformly lit images across a whole circumference screen without the need for complex signal correction, maintaining original radiation intensity and reducing manufacturing costs and alignment complexities.
Implementation Method 1
The optical portion may include a reflection surface that reflects the image light toward the irradiation target, the image light having been emitted from the emission portion
Data Source
AI summary
An image display device according to an embodiment of the present technology include an emission portion, an irradiation target, and an optical portion. The emission portion emits image light along a predetermined axis. The irradiation target is disposed at at least a part around the predetermined axis. The optical portion controls an incident angle of the image light on the irradiation target, the image light having been emitted from the emission portion, the optical portion being disposed in a manner that the optical portion faces the emission portion on the basis of the predetermined axis.