Image Display Apparatus Polarization Control for All-Around Screens
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Solution Overview
Problem
Existing image display technologies face challenges in achieving high-quality image display on all-around screens due to reflection issues, leading to luminance unevenness and reduced brightness.
Innovation Solution
An image display apparatus comprising an emitter, an optical unit, and a polarization control unit that controls the polarization state of image light in accordance with the shape of the all-around screen, ensuring the image light is projected with a consistent polarization direction to minimize reflection and maximize luminance across the entire screen.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If image light is projected on an all-around screen without polarization control, then the screen can display images in all directions, but reflection occurs causing luminance unevenness and reduced brightness
Solution Approach 1:
The patent applies different polarization states to different regions of the image light corresponding to different positions on the all-around screen. The polarization control unit adjusts the polarization state according to the irradiation position, ensuring optimal performance at each location while maintaining uniform luminance across the entire screen surface.
Solution Approach 2:
The patent dynamically changes the polarization state parameter of the image light based on the irradiation position. By adjusting polarization parameters (such as polarization direction or ellipticity) according to the screen position, the system reduces reflection and maintains consistent luminance across all viewing angles.
2Loss of energy
If conventional projection is used on transparent screens, then the screen allows light transmission, but specular reflection creates unnecessary images and reduces display quality
Solution Approach 1:
The patent converts the harmful specular reflection into a beneficial effect by controlling the polarization state of the projected light. By adjusting polarization, the system causes reflected light to have reduced intensity while maintaining light transmission, effectively turning the reflection problem into an opportunity for improved display quality.
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 effectively reduces reflection and luminance unevenness, resulting in high-quality, bright, and uniform image display on all-around screens by optimizing the polarization state of image light based on the screen's shape.
Implementation Method 1
the optically active crystal rotates, the polarization direction of transmitted light changes
Implementation Method 2
causes the emitted image light to enter the irradiation target object
Implementation Method 3
reflection of the image light on the interface
Data Source
AI summary
An image display apparatus according to an embodiment of the present technology includes an emitter, an irradiation target object, an optical unit, and a polarization control unit. The emitter emits image light along a predetermined axis. The irradiation target object is disposed in at least a part of an area around the predetermined axis. The optical unit is disposed to be opposite to the emitter by using the predetermined axis as a reference and causes the emitted image light to enter the irradiation target object. The polarization control unit controls a polarization state of the image light that enters the irradiation target object in accordance with a shape of the irradiation target object.