Stereoscopic Display Lens Divergence for Short Viewing Distance
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Solution Overview
Problem
Existing naked-eye stereoscopic display devices face challenges in achieving both excellent mechanical performance and effective 3D display at a short distance, as a smaller grating-to-display unit distance enhances mechanical stability but compromises the 3D effect, while a larger distance improves mechanical performance but is unfavorable for short-distance 3D viewing.
Innovation Solution
Incorporating a lens with a light divergence action at the light-transmitting regions of the grating, allowing light from first and second display units to be deflected closer to the viewer, maintaining a shorter viewing distance while ensuring better mechanical performance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If the distance between the grating and the display units is decreased, then the viewing distance is reduced and 3D display effect at short distance is achieved, but the mechanical performance and stability deteriorate
Solution Approach 1:
A lens is introduced as an intermediary optical element between the display panel and the grating. This lens diverges the light before it reaches the grating, effectively decoupling the physical distance between components from the optical path length. The lens acts as a mediator that allows the light to appear to originate from a different position, enabling short viewing distance without requiring the grating to be physically close to the display units.
Solution Approach 2:
The patent changes the optical parameters of the light path by introducing a lens with specific focal length and divergence characteristics. This parameter change allows the system to achieve different effective viewing distances without changing the physical distance between the grating and display units. The lens modifies the light divergence angle and apparent source position, enabling the contradiction to be resolved through optical parameter adjustment rather than mechanical reconfiguration.
2Reliability
If the distance between the grating and the display units is increased, then the mechanical performance is improved, but the viewing distance increases which is unfavorable for short distance 3D viewing
Solution Approach 1:
The lens serves as an intermediary that compensates for the increased physical distance between the grating and display units. By positioning the lens appropriately, it diverges the light in such a way that the effective optical path is shortened, allowing the viewer to maintain a short viewing distance even when the grating is positioned farther from the display units for mechanical stability.
Solution Approach 2:
The patent introduces an additional optical dimension by adding the lens element. This transforms the problem from a one-dimensional mechanical distance constraint to a multi-dimensional optical system where the light path can be independently controlled from the mechanical structure. The lens adds optical path length manipulation capability without affecting the mechanical distance between components.
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 solution enables a 3D display effect at a shorter distance with improved mechanical performance by deflecting light from the display units, allowing the viewer to maintain the optimal 3D image position while enhancing the display device's structural integrity.
Implementation Method 1
a lens with a light divergence action at a position corresponding to each of the light-transmitting regions of the grating
Data Source
AI summary
A stereoscopic display device is provided. The stereoscopic display device comprises: a display panel (100), comprising a plurality of first display units (101) and a plurality of second display units (102) which are alternately arranged; and a grating (200) positioned on a light exiting side of the display panel (100) and including a plurality of light-transmitting regions (a) and a plurality of light-shielding regions (b), wherein the stereoscopic display device comprises a lens (300) with a light divergence action at a position corresponding to each of the light-transmitting regions (a) of the grating (200). Therefore, when the stereoscopic display device is viewed at a short distance, a mechanical performance of the stereoscopic display device is improved.