Temporal Psychovisual Modulation for Multi-View Displays
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Solution Overview
Problem
Current multiview display methods, such as time multiplexing, are inefficient in utilizing the psychovisual redundancy of high-speed displays, limiting the number of concurrent views and causing decreased light influx for each view, and fail to generate meaningful images for viewers without auxiliary devices.
Innovation Solution
The method employs temporal amplitude modulation of two-dimensional atom frames, using display-synchronized viewing devices to apply different weights to individual frames, allowing a single high-speed display to generate multiple concurrent views without interference, and enabling private or secret images to be displayed to users with the appropriate viewing devices while showing a meaningful image to those without.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If time multiplexing is used to generate multiple views, then the number of concurrent views increases linearly with display speed, but the light influx of each view decreases linearly with the number of views
Solution Approach 1:
The system dynamically assigns different temporal weights to atom frames for different users through viewing devices. Each user's viewing device applies a unique weight vector to the sequence of atom frames, enabling dynamic control of which frames contribute to each user's perceived image. This dynamic weighting allows multiple users to simultaneously receive adequate light influx while viewing different concurrent views.
Solution Approach 2:
The invention changes the parameter of frame weighting from uniform (time multiplexing) to variable (temporal psychovisual modulation). By modifying the temporal weights assigned to individual atom frames based on user-specific parameters, the system enables each user to perceive a meaningful image composed of appropriately weighted frames, thereby maintaining light influx while increasing the number of concurrent views.
2Adaptability or versatility
If time multiplexing is used to display multiple views, then multiple users can view different images, but viewers without auxiliary viewing devices cannot see meaningful images
Solution Approach 1:
The system segments the atom frames into user-specific weighted combinations. Each user's viewing device applies a unique segmentation of the atom frame sequence through temporal weighting, creating distinct perceived images for each user. Meanwhile, the unweighted sum of all atom frames produces a meaningful default image for viewers without auxiliary devices.
Solution Approach 2:
The same sequence of atom frames serves multiple functions simultaneously: it generates user-specific weighted images for users with viewing devices, and also produces a meaningful unweighted sum image for viewers without auxiliary devices. This multi-functionality enables the system to serve both assisted and unassisted viewers concurrently.
3Speed
If high-speed display operates at refresh rates above flicker fusion frequency, then psychovisual redundancy is available for multiple views, but the human visual system cannot resolve temporally rapidly changing signals
Solution Approach 1:
The viewing device acts as an intermediary between the high-speed display and the human visual system. It applies temporal weights to atom frames before they reach the viewer's eyes, effectively translating the rapid temporal changes into perceptually meaningful weighted combinations that the visual system can resolve, while still utilizing the high refresh rate capability.
Solution Approach 2:
The system uses periodic display of atom frames at high refresh rates, where each atom frame is displayed for a brief period followed by the next frame in the sequence. This periodic action, combined with temporal weighting in the viewing device, enables the visual system to integrate the rapid temporal changes into stable perceived images.
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
This approach allows for a large number of concurrent views with increased light influx, enabling multiple users to see different images on the same display plane without interference, and allows for secure and private information display, enhancing applications in virtual reality, stereoscopy, and security displays.
Implementation Method 1
The human visual system (HVS) cannot resolve temporally rapidly changing optical signals beyond flicker fusion frequency (around 60 Hz for most viewers and under most conditions). But modern optoelectronic displays can operate at much higher refresh rates, e.g. 120 Hz, 240 Hz and beyond.
Implementation Method 2
The said viewing device(s) is(are) capable of adjusting, in a continuous range, the transmittance rate of light from the display plane of the said display device to eye(s) of the viewer who uses the viewing device, thus performing temporal amplitude modulation of the atom frames emitted by the display device.
Implementation Method 3
Different users perceive their intended images all on the same physical display plane, as the results of their individual HVS's fusing appropriately weighed consecutive atom frames.
Data Source
AI summary
An image/information display system and method based on temporal psychovisual modulation in the technical field of image/video processing and electro-optical display. The system includes a high speed display device and an auxiliary viewing device cooperating with each other and interacting with a human visual system. The auxiliary viewing device realizes the temporal amplitude modulation of the composition basic sequence by a method of controlling the light intensity transfer rate from the display plane of the high speed display device to the human eye.