Inclined Slit Grating for 3D Display to Reduce Moire Fringes
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Solution Overview
Problem
Conventional 3D displays with slit or lenticular grating structures suffer from Moire fringes and increased crosstalk due to the interference between the grating periodic structure and the 2D display panel's black matrix, affecting the stereoscopic viewing experience.
Innovation Solution
A 3D display device with a 2D display panel and a slit or lenticular lens grating, where the grating is inclined at an acute angle relative to the column direction of the panel, with specific subpixel arrangements and distances to minimize Moire fringes and crosstalk, allowing for effective two-viewpoint display without reducing image resolution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the grating is inclined at an acute angle relative to the column direction of the 2D display panel, then Moire fringes are reduced, but crosstalk between different viewpoint pixels increases
Solution Approach 1:
The patent changes the angular parameter of the grating from parallel (0 degrees) to an acute angle (45 degrees) relative to the column direction. This parameter change reduces Moire fringes by altering the interference pattern between the grating periodic structure and the black matrix periodic structure, while the specific angle selection balances the trade-off with crosstalk reduction.
2Adaptability or versatility
If the interval between central axes of adjacent light-transmitting strips is equal to the size of an odd number of subpixels (three or more), then two-viewpoint display is achieved, but image resolution may be reduced
Solution Approach 1:
The patent transitions from conventional two-viewpoint displays that require reducing pixel density to a approach that maintains full pixel density by utilizing angular dimension. By inclining the grating at 45 degrees and setting the interval to odd multiples of subpixel size, the system directs light from different subpixels to different viewpoints through angular separation rather than spatial sampling reduction, thereby maintaining image resolution while achieving two-viewpoint capability.
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 reduces Moire fringes and crosstalk, enabling a clear two-viewpoint display suitable for most two-viewpoint film sources while maintaining image resolution, by optimizing the grating's angle and subpixel distribution.
Implementation Method 1
a slit grating superimposed on the 2D display panel... the slit grating includes a plurality of light-transmitting strips and a plurality of light-shielding strips which are parallel to each other and alternately and periodically arranged
Implementation Method 2
Moire fringe will be produced due to the interference effect of a grating periodic structure and a black matrix (BM) periodic structure on a 2D display... an angle formed by a central axis of each of the light-transmitting strips or a central axis of each of the light-shielding strips and the column direction is an acute angle
Data Source
AI summary
A three dimensional (3D) display device and a display method thereof are provided. The 3D display device includes a two dimensional (2D) display panel (100) and a slit grating (200) superimposed on the 2D display panel (100). The 2D display panel includes a plurality of subpixels sequentially arranged in a row direction and a column direction; the slit grating includes a plurality of light-transmitting strips (202) and a plurality of light-shielding strips (201) which are parallel to each other and alternately and periodically arranged. An angle formed by a central axis of each of the light-transmitting strips or a central axis of each of the light-shielding strips and the column direction is an acute angle. An area between the central axes of two adjacent light-shielding strips is divided into a first subarea disposed on a first side and a second subarea disposed on a second side by a central axis of a light-transmitting strip between the two adjacent light-shielding strips; subpixels whose area falling into the first subarea is greater than ½ subpixel area are first viewpoint subpixels; and subpixels whose area falling into the second subarea is greater than ½ subpixel area are second viewpoint subpixels.