3D Display Grating Asymmetry for Granular Sensation Reduction
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Solution Overview
Problem
Current two-view type glasses-free 3D display technologies using grating type 3D displays often result in a strong granular sensation due to the division of images into candy stripes, affecting viewing comfort.
Innovation Solution
A 3D display device with a display panel and a grating disposed on one side, where the first and second display units are alternately arranged in both transverse and longitudinal directions, and the grating is configured at a predetermined acute angle to present separate images to the left and right eyes, reducing the granular sensation by eliminating continuous candy stripes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a vertically disposed parallax barrier grating is used to separate left-eye and right-eye images, then the 3D display achieves simple structure and low cost, but the viewer experiences strong granular sensation and reduced viewing comfort due to candy stripe patterns
Solution Approach 1:
The patent applies asymmetry by rotating the grating units from a vertical orientation to an oblique orientation at a specific angle (30-60 degrees) relative to the horizontal direction. This asymmetric adjustment changes the light splitting pattern, eliminating the continuous candy stripe patterns that cause granular sensation while maintaining the functional separation of left-eye and right-eye images.
Solution Approach 2:
The patent changes the orientation parameter of the grating units from vertical (90 degrees to horizontal) to an oblique angle (30-60 degrees to horizontal). This parameter modification alters the optical path and light distribution pattern, reducing the granular sensation caused by continuous candy stripes while preserving the 3D display functionality.
2Object-affected harmful factors
If the grating is disposed at an oblique angle to the horizontal direction, then the granular sensation is reduced and viewing comfort is improved, but the structural alignment complexity increases
Solution Approach 1:
The patent specifies a concrete parameter range (30-60 degrees) for the oblique angle of the grating units. By defining this parameter range, the patent balances the reduction of granular sensation with the practical considerations of manufacturing and alignment, avoiding excessive complexity while achieving the desired visual comfort improvement.
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 improves viewing comfort by reducing the granular sensation when viewing 3D images without glasses, as the acute angle between the grating units and the display panel's transverse direction is optimized to minimize the perception of candy stripes, enhancing the overall viewing experience.
Implementation Method 1
The grating has the function of light splitting and has the function of image separation when applied to the display
Implementation Method 2
Due to the light splitting function of the grating, for instance, the left eye of a viewer in front of the display panel can only view odd pixel columns but cannot view even pixel columns
Implementation Method 3
RGB sub-pixels include left-eye sub-pixels (indicated as RL, GL and BL respectively) and right-eye sub-pixels (indicated as RR, GR and BR respectively)
Data Source
AI summary
A three-dimensional (3D) display device comprises a display panel and a grating disposed on one side of the display panel. The display panel includes a plurality of first display units and a plurality of second display units; the first display units and the second display units are alternately arranged in both a transverse direction and a longitudinal direction of the display panel. The grating includes a plurality of grating units arranged in parallel; an acute angle between each grating unit and the transverse direction of the display panel is a predetermined angle; and the grating is configured to present a first image displayed by the plurality of first display units and a second image displayed by the plurality of second display units to a left eye and a right eye respectively. The 3D display device can reduce the granular sensation in viewing a 3D image and hence improve viewing comfort.