Grating Period Gradient for 3D Display Light Control
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Solution Overview
Problem
Current 3D display devices using geometrical optics principles for light control fail to meet the increasing demands for improved on-the-spot effect and viewer immersion, leading to a poor viewing experience.
Innovation Solution
A display device with a grating layer arranged inside or outside the display panel, featuring gradually decreasing grating periods for left-eye and right-eye regions of different colors, which controls light propagation using physical optics principles to direct light towards the viewer's eyes, enhancing the on-the-spot effect and immersion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If microprisms or microlenses are used to control light propagation, then light control is achieved, but the on-the-spot effect and viewer immersion deteriorate
Solution Approach 1:
The patent changes the fundamental optical principle from geometrical optics to physical optics (diffraction). By using a grating layer with specific grating periods, the system transforms how light is controlled - not through refraction or reflection as with microlenses/microprisms, but through diffraction patterns that can be precisely engineered to direct light to specific viewing zones, thereby improving both light control capability and viewer immersion.
Solution Approach 2:
The patent replaces the mechanical/optical system of microlenses and microprisms with a grating-based diffraction system. This substitution allows for more precise control over light propagation paths by utilizing the wave nature of light and diffraction effects, enabling better achievement of the on-the-spot effect and viewer immersion while maintaining reliable light control.
2Reliability
If geometrical optics principles are used for light control, then light propagation is controlled, but the viewing experience deteriorates
Solution Approach 1:
The patent fundamentally changes the optical control mechanism from geometrical optics to physical optics. By employing diffraction gratings with carefully designed grating periods, the system achieves superior light propagation control that directs light precisely to left-eye and right-eye viewing areas, significantly enhancing viewing experience while maintaining reliable light control.
Solution Approach 2:
The patent applies different grating periods in different regions of the display - specifically, different grating periods are used for left-eye and right-eye viewing areas. This local differentiation allows precise control of light propagation to each eye's specific viewing zone, thereby improving overall viewing experience while maintaining reliable light control for stereoscopic 3D display.
3Ease of manufacture
If fixed grating periods are used, then manufacturing is simplified, but light propagation control precision deteriorates
Solution Approach 1:
The patent implements a grating layer with spatially varying grating periods - different regions have different grating periods optimized for their specific function. The left-eye and right-eye regions have different grating periods that precisely control light propagation to each eye's viewing area. This local differentiation achieves high light propagation control precision while remaining manufacturable through standard photolithography techniques.
Solution Approach 2:
The grating layer is segmented into multiple regions with different grating periods - specifically divided into left-eye grating regions and right-eye grating regions. Each segment is optimized for its specific viewing zone, allowing precise control of light propagation to different spatial locations. This segmentation enables high precision light control while maintaining ease of manufacture through conventional fabrication processes.
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 improves the control of light propagation, resulting in a more immersive and comfortable viewing experience by adjusting the diffraction angles and intensities of light emitted from different regions of the display device.
Implementation Method 1
A grating layer arranged inside or outside of the display panel... controls light propagation using physical optics principles to direct light towards the viewer's eyes, enhancing the on-the-spot effect and immersion... adjusting the diffraction angles and intensities of light emitted from different regions
Data Source
AI summary
The present disclosure provides a display device. The display device comprises a display panel and a grating layer, wherein along a direction pointing from a center of a left-eye field-of-view central area to a non left-eye field-of-view central area, a grating period of a left-eye grating region of a first color, a grating period of a left-eye grating region of a second color, and a grating period of a left-eye grating region of a third color all decrease gradually; along a direction pointing from a center of a right-eye field-of-view central area to a non right-eye field-of-view central area, a grating period of a right-eye grating region of the first color, a grating period of a right-eye grating region of the second color, and a grating period of a right-eye grating region of the third color all decrease gradually.