Curved Diffuser Array for 3D Display Crosstalk Reduction
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Solution Overview
Problem
Conventional 3D display technologies suffer from image crosstalk due to lens aberrations, limiting the viewing angle and affecting the 3D effect.
Innovation Solution
A 3D display apparatus comprising a display panel, a collimating backlight module, a lens array, and a curved diffuser array, where the light beams from the display panel undergo diffusion treatment by the curved diffuser array before passing through the lens array, effectively reducing crosstalk by managing spherical aberration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a lenticular lens array is used for naked-eye 3D display, then the 3D effect can be achieved, but lens aberrations cause image crosstalk at large viewing angles
Solution Approach 1:
A curved diffuser array is introduced as an intermediary component between the display panel and the lenticular lens array. The curved diffuser plates scatter the light from each pixel in a controlled manner, creating an expanded virtual light source that reduces the impact of lens aberrations. This intermediary structure allows light to be distributed more evenly across the lens array, minimizing image crosstalk while maintaining wide viewing angles.
Solution Approach 2:
The invention transitions from a conventional flat diffuser structure to a curved diffuser array with three-dimensional curvature. The curved surfaces of the diffuser plates are specifically designed with different radii of curvature in different directions, creating a complex spatial light distribution pattern that compensates for lens aberrations and enables wider viewing angles without significant image crosstalk.
2Adaptability or versatility
If the viewing angle is increased beyond the optimal range, then more viewers can see the 3D image, but lens aberrations cause pixels to be perceived at incorrect positions
Solution Approach 1:
The curved diffuser plates are designed with specific curvature parameters (radii of curvature) that are optimized to compensate for lens aberrations. By carefully controlling the geometric parameters of the curved surfaces, the system maintains accurate image positioning across a wide range of viewing angles, effectively decoupling the viewing angle range from image position accuracy degradation.
3Ease of operation
If a parallax barrier or lenticular lens is used for auto-stereoscopic display, then glasses-free 3D display is achieved, but the structure becomes more complex
Solution Approach 1:
The diffuser array is segmented into multiple independent curved diffuser plates, each corresponding to a specific region of the display panel. This segmentation allows for modular manufacturing and assembly, reducing overall system complexity while maintaining the optical functionality needed for glasses-free 3D display.
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 combination of the collimating backlight module, lens array, and curved diffuser array enhances the 3D effect by minimizing crosstalk, allowing for a wider viewing angle without image aberrations.
Implementation Method 1
light beams of the projected two-dimensional image first go through a diffusion treatment provided by the curved diffuser array
Implementation Method 2
due to the existence of lens aberrations, human eyes at an inappropriate viewing angle would perceive pixel images which are not suppose to be seen, and thereby causing an image crosstalk
Implementation Method 3
then pass through the lens array to reconstruct a 3D scene
Data Source
AI summary
A 3D display apparatus is disclosed and has a display panel, a collimating backlight module, a lens array and a curved diffuser array. The lens array is mounted on the display panel and has a plurality of lens units arranged in an array manner. The curved diffuser array is mounted between the display panel and the lens array and includes a plurality of curved diffuser plates arranged in an array manner. The positions of the curved diffuser plates correspond to the positions of lens units, respectively. The light of a two-dimensional image projected by the display panel first goes through a diffusion treatment provided by the curved diffuser array, and then passes through the lens array to reconstruct a 3d scene.