Transparent Multiview Display Using Light-Guide Directional Beams
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Solution Overview
Problem
Passive displays lack the ability to emit light, limiting their practical applications, and existing solutions that couple them with external light sources often require additional components like backlights, which can be cumbersome and inefficient.
Innovation Solution
A transparent multiview display using a light guide with angle-preserving scattering and multibeam elements to provide directional light beams for a multiview image, allowing simultaneous viewing of both the display content and the background scene, and enabling augmented reality experiences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a conventional display is used, then information can be displayed, but the display blocks the view when transparent is needed
Solution Approach 1:
The display device dynamically changes its transparency state between transparent and opaque based on operational requirements. The controller switches the display between a first state (transparent, allowing light passage) and a second state (opaque, blocking light) to provide information only when needed, eliminating permanent view obstruction.
Solution Approach 2:
The optical properties of the display are changed by adjusting parameters such as applied voltage to transition between transparent and opaque states. By controlling the electrical parameters of the display medium, the system achieves variable transparency to resolve the contradiction between displaying information and maintaining viewability.
2Object-affected harmful factors
If a transparent display is used, then the view remains unobstructed, but information cannot be displayed effectively
Solution Approach 1:
The display transitions between transparent and opaque states dynamically. When information needs to be conveyed, the display becomes opaque to ensure visibility; when information display is not required, it returns to transparent state to maintain clear view through the display surface.
Solution Approach 2:
The display operates in periodic cycles between transparent and opaque states based on information display requirements. This periodic switching allows the system to alternate between providing clear views and displaying information, optimizing both functions at different time intervals.
3Loss of information
If the display is always opaque to show information, then information is always visible, but the view is permanently blocked
Solution Approach 1:
The display area dynamically adjusts its opacity rather than remaining permanently opaque. The controller activates opaque state only in specific regions or time periods when information display is required, maximizing the visible area during transparent states while maintaining information display capability when needed.
Solution Approach 2:
Instead of making the entire display permanently opaque, the system applies opacity partially or temporarily only when and where information needs to be displayed. This partial action approach maintains maximum visible area while providing information display functionality on demand.
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 efficient light emission and multiview capabilities while maintaining transparency, providing an augmented reality experience by allowing simultaneous viewing of both the display content and the background scene, enhancing the display's functionality and usability.
Implementation Method 1
a first electrode configured to emit electrons in response to a first voltage applied across the transparent display
Implementation Method 2
a phosphor layer configured to emit light in response to the electrons emitted by the first electrode
Data Source
Figure 1A~1B
Figure 2~3A
Figure 3B~3C
AI summary
A transparent display and a transparent multiview display an image while enabling a background scene to be visible through the display. The transparent display includes a light guide having a scattering feature and an array of light valves configured to modulate emitted light scattered from the light guide to provide modulated emitted light representing a displayed image. Transparency of a combination of the light guide and the array of light valves is configured to enable the background scene to be visible through the transparent display. The transparent multiview display includes the light guide and a plurality of multibeam elements configured to scatter guided light from the light guide as a plurality of directional light beam. The transparent multiview display further includes an array of light valves to modulate the directional light beams to provide the display image as a multiview image.