3D Display Light Direction Control via Blazed Grating
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Solution Overview
Problem
Current three-dimensional display devices using barrier gratings or optical lenses result in significant power waste, as only a portion of the emitted light is received by human eyes, leading to inefficient energy utilization.
Innovation Solution
A three-dimensional display device with light emitting unit groups and a control unit that directs light emitting units to specific target positions, utilizing a transmission grating to adjust light directions, ensuring that only necessary light is emitted towards the viewer's position, thereby reducing power consumption and enhancing energy efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If barrier gratings or optical lenses are used for three-dimensional display, then the three-dimensional display effect is achieved, but most of the light emitted by the display device is not received by human eyes, resulting in serious waste of power
Solution Approach 1:
The patent divides the backlight system into multiple independently controllable light emitting units corresponding to different display units. Each light emitting unit can be controlled separately to emit light in specific directions toward the viewer's eyes, rather than emitting light in all directions. This segmentation enables precise control of light distribution, reducing energy waste while maintaining the three-dimensional display effect.
Solution Approach 2:
The patent implements directional light emission by making each light emitting unit emit light in a specific direction corresponding to its associated display unit and the viewer's position. This local quality approach ensures that light is concentrated where needed (toward the viewer's eyes) rather than uniformly distributed, improving energy efficiency while preserving the three-dimensional display capability.
2Loss of energy
If light emitting units emit light in all directions, then the display coverage is maximized, but the power consumption increases significantly
Solution Approach 1:
The patent employs dynamic control of light emitting units based on the viewer's position. The system can adjust which light emitting units are active and in which directions they emit light, adapting to the viewer's location. This dynamic approach ensures that light is emitted only where and when needed, maximizing energy efficiency while maintaining adequate display coverage.
Solution Approach 2:
The patent utilizes periodic scanning or selective activation of light emitting units corresponding to different viewing zones. By periodically activating specific light emitting units based on detected viewer position, the system maintains display coverage while minimizing continuous power consumption across all units.
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 effectively reduces power consumption and increases the utilization of luminous energy by directing light only to the viewer's position, minimizing unnecessary light emission and enhancing the three-dimensional display effect.
Implementation Method 1
the transmission grating is configured to change the light emitting directions of the light emitting units
Implementation Method 2
the transmission grating is a blazed grating; the blazed grating includes a grating surface and a groove surface
Data Source
AI summary
The present disclosure provides a three-dimensional display device and a display method thereof. The three-dimensional display device includes a display panel including a plurality of first display units and a plurality of second display units; a plurality of light emitting unit groups disposed on one side of the display panel, wherein each of the light emitting unit groups includes a plurality of first light emitting units respectively corresponding to the first display units, and a plurality of second light emitting units respectively corresponding to the second display units; and a control unit configured to control the first light emitting units and the second light emitting units in a light emitting unit group corresponding to a target position to emit lights so that the first light emitting units and the second light emitting units emit lights along a direction pointed to the target position.