Glasses-Free 3D Display Backlight Segmentation
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Solution Overview
Problem
Current 3D display systems face limitations such as requiring special glasses, decreased resolution, and inadequate sunlight readability, making them unsuitable for applications like avionics where comfort and clarity are crucial.
Innovation Solution
A 3D display system that uses a backlight with alternating light-producing elements and a lens system to refract light into left and right eye viewing envelopes, synchronized with an LCD panel to selectively pass or block light, producing field sequential left and right eye image frames without the need for glasses, enhancing resolution and sunlight readability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If parallax-barrier or lenticular lens 3D display technologies are used, then the viewer does not need to wear special glasses, but the image resolution decreases
Solution Approach 1:
The backlight is divided into multiple independently controllable light-producing elements (such as LED columns or rows) that can be selectively activated. This segmentation allows the system to generate separate left-eye and right-eye image sequences by activating different sets of light-producing elements in alternating frames, achieving glasses-free 3D display without the resolution loss associated with parallax-barrier or lenticular lens technologies.
2Reliability
If current 3D display systems are used, then 3D images can be displayed, but sunlight readability is insufficient
Solution Approach 1:
The system introduces a liquid crystal display (LCD) panel as an intermediary between the backlight and the viewer. The LCD panel can be controlled to have different transparency states, allowing it to block ambient sunlight when needed while maintaining the 3D display function. This intermediary layer enables the system to overcome sunlight readability issues without sacrificing 3D display capability.
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 solution provides a comfortable viewing experience without glasses, improved resolution, and enhanced sunlight readability, making it suitable for applications like avionics displays.
Implementation Method 1
a lens system to refract light into left and right eye viewing envelopes
Implementation Method 2
controlling a liquid crystal display (LCD) panel synchronously with the backlight in order to selectively pass or block portions of the light produced by the backlight
Data Source
AI summary
Embodiments include aircraft systems, display systems, and methods for displaying three dimensional (3D) images. A backlight is controlled to sequentially alternate between activating a first set of light producing elements of the backlight and activating a second set of light producing elements of the backlight, where light produced by the first set of light producing elements is refracted by a lens system into a left eye viewing envelope, and light produced by the second set of light producing elements is refracted by the lens system into a right eye viewing envelope. A liquid crystal display (LCD) panel is controlled synchronously with the backlight in order to selectively pass or block portions of the light produced by the backlight in order to produce one or more left eye image frames in the left eye viewing envelope and one or more right eye image frames in the right eye viewing envelope.