Depth Fusion Engine Circuitry for Stereoscopic Display Driver
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Solution Overview
Problem
Stereoscopic imaging technologies, such as virtual reality goggles, cause user fatigue due to the disparity between focal and vergence distances, leading to eye strain from focusing on a fixed display while perceiving objects at varying distances.
Innovation Solution
An integrated circuit with depth fusion engine circuitry generates focal perspective images for each eye at multiple focal distances, reducing the disparity between focal and vergence distances by displaying multiple images at different focal depths, and a display driver circuitry drives a multifocal display to showcase these images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a fixed display distance is used in stereoscopic devices, then the display structure is simple and easy to manufacture, but the focal distance cannot match the vergence distance, causing viewer fatigue
Solution Approach 1:
The display is segmented into multiple virtual sub-displays, each corresponding to a different focal distance. The image is divided into multiple focal planes, with each plane displayed at a different optical distance from the eye. This allows different portions of the stereoscopic image to be focused at different distances, matching the vergence distance and reducing viewer fatigue while maintaining a physically simple single-display structure.
2Object-affected harmful factors
If multiple focal planes are displayed to reduce viewer fatigue, then viewing comfort is improved, but the device complexity increases due to need for multiple displays or complex optical systems
Solution Approach 1:
A depth fusion engine circuit acts as an intermediary between the stereoscopic image data and the display driver. This circuitry automatically generates the multiple focal plane images from standard stereoscopic input, performing the complex image processing required for multifocal display without requiring complex hardware modifications. The intermediary circuitry handles the computational complexity while the physical display remains simple.
3Device complexity
If the display provides only a single focal distance, then the display driver is simple, but it cannot accommodate objects at different perceived distances, reducing the effectiveness of stereoscopic imaging
Solution Approach 1:
The display system becomes dynamic by providing multiple adjustable focal planes rather than a fixed single focal distance. The depth fusion engine circuitry dynamically generates images at different focal distances based on the stereoscopic content, allowing the display to adapt to objects at various perceived distances. This dynamic multifocal capability enhances stereoscopic effectiveness while the display driver maintains relative simplicity by using standard display interfaces.
Data Source
AI summary
Described examples include an integrated circuit having depth fusion engine circuitry configured to receive stereoscopic image data and, in response to the received stereoscopic image data, generate at least: first and second focal perspective images for viewing by a first eye at multiple focal distances; and third and fourth focal perspective images for viewing by a second eye at multiple focal distances. The integrated circuit further includes display driver circuitry coupled to the depth fusion engine circuitry and configured to drive a display device for displaying at least the first, second, third and fourth focal perspective images.