Optical Shutter Louver Structure for Selective Transparent Viewing
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Solution Overview
Problem
Transparent organic light emitting displays allow simultaneous viewing of images and backgrounds, which can be inconvenient in environments where users want to focus on the image alone.
Innovation Solution
An optical shutter with a louver layer and electrophoretic particles that can operate in transmissive, blocking, and viewing angle control modes, adjusting light transmission based on electrode voltages to manage visibility of the background and image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent display device allows simultaneous viewing of image and background, then the display image and background can be viewed together, but the visibility of the display image is deteriorated
Solution Approach 1:
The patent applies the dynamics principle by making the optical shutter controllable to switch between different states (open/closed, angle-specific blocking). The shutter can dynamically adjust its position and orientation based on viewing requirements, transitioning between transparent mode (both image and background visible) and clear mode (background blocked, image focused). This dynamic control resolves the contradiction by allowing the system to adapt its optical properties according to the user's needs rather than being fixed in a single state.
Solution Approach 2:
The patent applies local quality by implementing angle-specific light blocking through the louver layer's prism structure. Different regions of the optical shutter have different functional properties - some areas block light at specific angles while others remain transparent. This local differentiation allows the system to control background visibility in specific viewing directions while maintaining transparency in other directions, thereby improving image visibility for the primary viewing angle without completely blocking the background for all viewers.
2Ease of operation
If an optical shutter blocks light completely, then the background is blocked, but light transmission is reduced
Solution Approach 1:
The optical shutter employs local quality through its louver layer with prism structures that create angle-dependent optical properties. Different portions of the shutter block light at different angles, allowing the system to selectively block background light for specific viewing directions while maintaining light transmission for other angles. This localized blocking approach enables image focus control without completely eliminating light transmission, thus resolving the contradiction between blocking capability and transmission preservation.
3Adaptability or versatility
If a transparent display device maintains constant transparency, then the background is always visible, but the user cannot focus on the display image in environments where background distraction is present
Solution Approach 1:
The patent implements dynamics by providing users with active control over the optical shutter's state. The shutter can be dynamically adjusted between transparent mode (for when background visibility is desired) and clear mode (for when image focus is needed), allowing the display to adapt to different environmental conditions and user preferences. This dynamic adjustability resolves the contradiction by enabling the system to switch between constant transparency and focused imaging based on real-time user needs.
Solution Approach 2:
The patent applies parameter changes by modifying the optical properties of the shutter through voltage-controlled electrophoretic particles that alter the refractive index or positioning of the louver layer. By changing these optical parameters in response to user input, the system can transition between different viewing modes, allowing users to focus on the display image when needed while maintaining background visibility when desired, thus resolving the contradiction between environmental adaptability and viewing convenience.
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
Enables optimal image viewing by allowing simultaneous image and background visibility in some scenarios and blocking the background in specific viewing angles, enhancing user experience in various environments.
Implementation Method 1
electrophoretic particles provided in spaces between the louver layer and the second substrate, and the louver layer includes a transparent insulating film disposed on the second inclined surface, the first substrate includes a plurality of first and second electrodes formed on an inner surface of the first substrate, the second substrate includes a plurality of third electrodes formed on an inner surface of the second substrate
Data Source
AI summary
A selective transparent display device according to an embodiment can be operated in a transparent mode in which a background is transmitted, a clear mode in which the background is blocked, and a viewing angle control mode in which the background is blocked only at a specific viewing angle or within a specific viewing angle range depending on the usage environment. The selective transparent display device can include a transparent display panel configured to display images and an optical shutter disposed on a surface of the transparent display panel.