Angular Subpixel Rendering Multiview Display Shifted Multibeam Elements
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Solution Overview
Problem
Passive electronic displays, which do not emit light, are limited in practical applications due to their inability to emit light, often requiring an external light source for functionality, which can restrict their use in various applications.
Innovation Solution
A multiview display system utilizing a plate light guide with spatially offset multibeam elements that modulate light beams to create a higher perceived resolution by interleaving light beams from sets of light valves, allowing for multiple views of an image to be displayed from different angles without the need for an external light source.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If passive displays are coupled to an external light source, then they can emit light and function as active displays, but this restricts their use in applications where external light sources are not feasible
Solution Approach 1:
The display device generates its own light through light-generating elements integrated into the display structure, eliminating the need for external light sources. The passive display modulates this self-generated light to create the desired visual output, enabling use in applications where external backlighting is not feasible.
2Adaptability or versatility
If multiple views are displayed from different angles using traditional methods, then multiview capability is achieved, but the perceived resolution decreases
Solution Approach 1:
The display divides light emission into multiple discrete angular directions using light-generating elements positioned at specific locations. Each light-generating element emits light in a controlled direction, and by segmenting the light source array, the system creates multiple distinct views while maintaining high perceived resolution through angular subpixel rendering.
Solution Approach 2:
The patent introduces angular dimension as an additional degree of freedom for displaying multiple views. By controlling light emission in different angular directions rather than just spatial positions, the system achieves multiview capability while preserving resolution through angular subpixel rendering techniques.
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 multiview display system achieves a higher perceived resolution and enables the simultaneous display of multiple views of an image from different angles, enhancing the display capabilities of passive electronic displays without relying on external light sources.
Implementation Method 1
a backlight that includes a light source that is optically coupled to a plate light guide that is configured with a plurality of multibeam elements, where each multibeam element corresponds to a set of light valves of the plurality of sets of light valves and the size of each multibeam element is comparable to the size of a light valve of the set of light valves
Implementation Method 2
where the plurality of multibeam elements are spatially offset with respect to a center of a corresponding set of light valves of the plurality of sets of light valves such that light beams that emerge from the sets of light valves of the plurality of sets of light valves interleave to create multiview images at a viewing distance from the screen
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 2C
AI summary
Multiview displays include a backlight and a screen used to form a plurality of multiview pixels. Each multiview pixel includes a plurality of sets of light valves. The backlight includes a light source optically coupled to a plate light guide configured with a plurality of multibeam elements. Each multibeam element corresponds to a set of light valves and is spatially offset with respect to a center of the set of light valves toward a center of the multiview pixel. The plurality of multibeam elements are also configured to couple out light from the plate light guide with different angles and angular offsets such that at least a portion of the coupled-out light beams interleave and propagate in different view directions of the multiview display.