Transparent Display Shutters for Bidirectional Image Separation
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Solution Overview
Problem
Existing transparent display apparatuses are limited in displaying images on both the front and back surfaces, with images on the back surface being symmetrical to those on the front and economically inefficient use of multiple light emitting layers hindering commercialization.
Innovation Solution
A display apparatus with a transparent display panel featuring first and second optical shutter parts on opposite sides, controlled to alternately display different images at a pre-set frequency, with the shutter parts changing states twice as fast to allow separate image viewing from different directions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple light emitting layers are provided to display images on both front and back surfaces, then image display capability on both surfaces is improved, but manufacturing cost and device complexity increase
Solution Approach 1:
The patent employs periodic switching of optical shutters to enable bidirectional image display. The optical shutters alternately open and close to direct light from a single light emitting layer toward either the front or back surface, achieving versatile display capability without the complexity of multiple simultaneous light emitting layers. This periodic action allows the system to function adaptively for different display directions using the same hardware resources.
Solution Approach 2:
The single light emitting layer is designed to serve multiple functions by combining it with controllable optical shutters. The same light emitting layer can display images on both the front and back surfaces sequentially, making the display system universal rather than requiring separate dedicated layers for each surface. This multi-functionality reduces device complexity while maintaining adaptability.
2Adaptability or versatility
If multiple light emitting layers are provided to display images on both front and back surfaces, then image display capability is improved, but manufacturing cost increases
Solution Approach 1:
By using periodic switching of optical shutters instead of multiple simultaneous light emitting layers, the patent reduces manufacturing costs. The system achieves bidirectional display capability through temporal multiplexing rather than spatial duplication, requiring fewer materials and simpler assembly processes.
Solution Approach 2:
The patent creates a functional copy of the display capability for the back surface by using optical shutters to redirect light from the front surface light emitting layer. Instead of manufacturing separate physical light emitting layers, the system uses optical control to replicate the display function, significantly reducing manufacturing complexity and cost.
3Speed
If optical shutters are controlled at twice the image output frequency, then image switching responsiveness is improved, but control complexity increases
Solution Approach 1:
The optical shutters are controlled with periodic switching at twice the image output frequency to ensure rapid response. This periodic control allows the shutters to complete full open-close cycles within each image frame period, enabling fast switching between front and back surface display modes while maintaining synchronization with the display refresh rate.
Solution Approach 2:
The optical shutters are controlled in advance of the actual image display switching. By pre-positioning the shutters in the correct state before image content changes, the system ensures responsive switching without requiring complex real-time adjustment mechanisms during image rendering.
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 simultaneous display of distinct images from multiple directions using a single light emitting layer, enhancing user satisfaction and economic feasibility by optimizing the use of optical shutters.
Implementation Method 1
a first optical shutter part provided at a first side of the plurality of pixel devices and a second optical shutter part provided at a second side of the plurality of pixel devices opposite from the first side
Data Source
AI summary
A display apparatus includes a transparent display panel including pixel devices; a first optical shutter part provided at a first side of the pixel devices and a second optical shutter part provided at a second side of the pixel devices opposite from the first side; and at least one processor configured to: control the transparent display panel to alternately display a first image and a second image at a pre-set output frequency, control the first optical shutter part and the second optical shutter part to be in an open state or a closed state based on the pre-set output frequency, control the second optical shutter part to be in the closed state while the first optical shutter part is in the open state, and control the second optical shutter part to be in the open state while the first optical shutter part is in the closed state.