Pepper's Ghost Illusion on Portable Displays
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Solution Overview
Problem
Modern display devices face limitations in providing alternative viewing modes, particularly for portable light-emissive displays like tablets and smartphones, where users can view the Pepper's Ghost illusion from arbitrary angles, leading to distortion and reduced effectiveness of the illusion.
Innovation Solution
A conical semi-reflective panel is attached to light-emissive displays, using a flat arcuate sheet to form a cone with a predetermined angle, which is stabilized by an attachment member, allowing for pre-inverse distortion of images to create a hologram-like effect that appears solid and undistorted to the viewer, regardless of the viewing angle.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a flat semi-reflective panel is used for Pepper's Ghost illusion, then the illusion can be viewed from arbitrary angles, but the image becomes distorted and the effectiveness is reduced
Solution Approach 1:
The patent applies curvature by transitioning from a flat panel to a conical reflector. The conical shape with its curved surface redirects light rays to compensate for distortion, allowing the illusion to be viewed from multiple angles while maintaining image fidelity. The curved geometry focuses and redirects light in a manner that corrects the distortion inherent in flat panel configurations.
2Manufacturing precision
If a conical semi-reflective panel is used, then the image remains undistorted, but the device complexity increases
Solution Approach 1:
The patent employs a thin conical shell made of semi-reflective material that can be conformally attached to the display surface. This thin-film approach maintains structural simplicity while achieving the necessary curved geometry for distortion correction. The flexible nature of the thin shell allows it to conform to the conical shape without requiring complex rigid structures.
3Area of stationary object
If the cone angle is increased to expand the field of view, then more users can view simultaneously, but the reflected image area decreases
Solution Approach 1:
The patent utilizes the third dimension by positioning the conical reflector at an angle relative to the display surface. This angular arrangement creates a spatial transformation where the reflected image is projected into a different dimensional plane, effectively expanding the viewing field without sacrificing image area. The conical geometry distributes the reflection across multiple angular dimensions.
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 stable and effective Pepper's Ghost illusion on portable displays, allowing users to view undistorted images from various angles, enhancing the hologram-like effect and usability in various contexts, such as social media interactions or navigation.
Implementation Method 1
a cone of semi-reflective material is positioned on a light emissive display
Data Source
Figure 1A~1B
Figure 2~3
Figure 4~5
AI summary
A display system for use in a Pepper's Ghost illusion comprises a light emissive display, a sensor operable to detect the position of an attachment member of a cone, relative to the light emissive display, and a positioning processor operable to position images, which have been distorted by an inverse of the distortion caused by the reflection of the cone, responsive to the detected position of the cone relative to the light emissive display.