Predictive Head-Tracking Multiview Display for Consistent Views
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Solution Overview
Problem
Passive displays, such as LCDs and EP displays, lack the ability to emit light, limiting their practical applications due to the lack of self-illumination, while active displays like CRTs, PDPs, and OLEDs consume more power and may cause disconcerting view shifts in multiview displays due to invariant shift values over the field of view.
Innovation Solution
A head-tracking multiview display system that uses a multibeam backlight and a processor to shift views based on predicted user positions, varying the shift value over the field of view to ensure a consistent viewing experience by employing a light valve array and head-tracking sensors to adjust image projections accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If passive displays (LCD, EP) are used, then power consumption is reduced, but self-illumination capability is lost
Solution Approach 1:
The patent introduces a multibeam backlight as an intermediary light source that provides illumination to the display panel. This allows passive display technology to achieve self-illumination capability through the backlight system, resolving the contradiction between low power consumption and self-illumination capability.
2Illumination intensity
If active displays (CRT, PDP, OLED) are used, then self-illumination capability is achieved, but power consumption increases
Solution Approach 1:
The patent uses a display panel that replicates the image information from a source without requiring the panel itself to generate light. The multibeam backlight provides illumination, and the panel modulates this light to create the displayed image, achieving self-illumination functionality with lower power consumption than traditional active displays.
3Device complexity
If invariant shift values are used in multiview displays, then device complexity is reduced, but view consistency across field of view deteriorates
Solution Approach 1:
The patent implements dynamic shift values that vary across different regions of the display panel based on head-tracking information. The processor adjusts the shift values in real-time according to the user's head position, ensuring consistent view composition across the field of view while maintaining manageable device complexity through algorithmic control.
Solution Approach 2:
The patent incorporates head-tracking sensors that provide feedback about the user's head position to the processor. This feedback loop allows the system to automatically adjust shift values to maintain consistent view composition, resolving the contradiction between device complexity and view consistency.
Data Source
AI summary
A predictive head-tracking multiview display includes a multibeam backlight that provides a plurality of light beams having different principal angular directions corresponding to different view directions of a multiview image. A processor receives a plurality of provisional views of the multiview image. The provisional views correspond to the different view directions. The processor receives information about a predicted position of a user. The processor shifts the provisional views with respect to the view directions to form a plurality of shifted views that correspond to the different view directions. The shifted views are shifted by a shift value that varies as a function of the predicted position of the user and varies over a field of view of the multiview image. A light valve array modulates the plurality of light beams to provide the plurality of shifted views of the multiview image to the view directions as the multiview image.