Active Grating for Variable Viewing Position 3D Display
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Solution Overview
Problem
Conventional naked-eye 3D display devices require viewers to be positioned at a specific location to achieve a good stereoscopic effect, and failure to do so results in a poor or absent 3D display.
Innovation Solution
An active grating system comprising a first and second substrate with strip electrodes and a light control layer, driven by a circuit that adjusts light shielding and transmitting regions based on viewer distance, ensuring equal horizontal widths of light shielding regions for optimal 3D image viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fixed parallax barrier or lenticular lens structure is used to achieve 3D display, then the stereoscopic effect can be obtained at a specific viewing position, but the viewer must be positioned at a certain location to see the 3D image with better effect, otherwise the stereoscopic effect is poor or absent
Solution Approach 1:
The patent applies dynamics by making the grating structure adjustable and reconfigurable. The active grating can change its parameters (such as grating period, width of light shielding regions) dynamically to adapt to different viewing positions and distances, transforming a static optical system into a dynamic one that maintains 3D effect quality across varying viewer locations
Solution Approach 2:
The patent implements parameter changes by modifying the grating period and the width of light shielding regions based on the viewer's distance from the display. The driving circuit adjusts these parameters in real-time according to detected viewer position, enabling the system to maintain optimal 3D stereoscopic effect regardless of where the viewer is positioned within the viewing zone
2Ease of operation
If the light shielding regions are made wider to increase viewing comfort, then the viewing region expands, but the horizontal width of light shielding regions becomes unequal, affecting display quality
Solution Approach 1:
The patent applies local quality by allowing different regions of the grating to have different light shielding widths based on their specific functional requirements. The driving circuit can independently control the width of each light shielding region, enabling local optimization where some regions have wider shielding for comfort while others maintain precise dimensions for display quality, with each region's properties tailored to its specific role
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
Enables viewers to see an ideal 3D image from a variable range of positions by automatically adjusting the active grating's light shielding regions, improving the practicality and consistency of the 3D display experience.
Implementation Method 1
a light control layer, disposed between the plurality of first strip electrodes and the common electrode
Data Source
AI summary
An active grating, a three-dimensional display device and a three-dimensional display method are provided. The three-dimensional display device comprises: a display panel (1) and an active grating (2) disposed oppositely; a face recognition module, configured to acquire a distance from a current viewer to the active grating (2); a first calculating module, in signal connection with the face recognition module, configured to calculate a theoretical horizontal width of each of the light shielding regions (21) when the current viewer see an ideal 3D image at a current position, according to the distance acquired by the face recognition module and a first corresponding relationship between the distance from the current viewer to the active grating and the theoretical horizontal width of each of the light shielding region of the active grating when the current viewer see the ideal 3D image; and an adjusting module, in signal connection with the first calculating module and a driving circuit of the active grating respectively, configured to send a corresponding first control instruction to the driving circuit according to the theoretical horizontal width calculated by the first calculating module so as to adjust an actual horizontal width of each of the light shielding regions (21) of the active grating, so that the actual horizontal width equals to the theoretical horizontal width. The three-dimensional display device provided by embodiments of the invention can change the viewing region position according to position coordinates of the viewer, so that the ideal 3D image can be seen by the viewer not positioned at a fixed viewing region position, thus, improving practicality of the three-dimensional display device obviously.