Pre-processing Circuitry for Lenticular Display Aliasing Reduction
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Solution Overview
Problem
Current electronic devices with lenticular displays face challenges in providing high-quality three-dimensional images due to aliasing and image quality issues, particularly when using anisotropic lenticular lenses that redirect light for stereoscopic viewing.
Innovation Solution
Incorporating pre-processing circuitry in the display pipeline that applies an anisotropic low-pass filter or anisotropically resizes two-dimensional images to mitigate aliasing and improve image quality, combined with tone mapping, ambient light adaptation, and dithering to optimize luminance and color representation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If anisotropic lenticular lenses are used to redirect light for stereoscopic viewing, then three-dimensional image perception is enabled, but aliasing and image quality issues occur
Solution Approach 1:
The patent applies pre-processing circuitry that performs anisotropic low-pass filtering and anisotropic resizing of two-dimensional images before they are displayed through the lenticular lenses. This preliminary action mitigates aliasing and improves image quality by preparing the images in advance for the specific optical characteristics of the anisotropic lenticular lenses, thereby resolving the contradiction between enabling stereoscopic viewing and maintaining image quality.
2Manufacturing precision
If pre-processing circuitry applies anisotropic low-pass filter to two-dimensional images, then aliasing is reduced and image sharpness is improved, but processing time and computational complexity increase
Solution Approach 1:
The pre-processing circuitry performs the anisotropic low-pass filtering and anisotropic resizing operations in advance, before the images are sent to the display pipeline. By completing these computationally intensive operations beforehand, the system prepares optimized images for display while minimizing real-time processing delays, thus improving image sharpness while managing processing time constraints.
3Measurement precision
If multiple processing stages (tone mapping, ambient light adaptation, dithering) are applied to two-dimensional images, then luminance and color representation are optimized, but device complexity increases
Solution Approach 1:
The patent divides the image processing pipeline into distinct functional stages: pre-processing circuitry for anisotropic filtering and resizing, tone mapping circuitry for luminance optimization, ambient light adaptation circuitry for environmental compensation, and dithering circuitry for quantization optimization. This segmentation allows each stage to perform its specific function independently, making the complex processing pipeline more manageable and modular while achieving precise luminance and color representation.
Data Source
AI summary
An electronic device may include a lenticular display. The lenticular display may have a lenticular lens film formed over an array of pixels. The display may have a number of independently controllable viewing zones. Each viewing zone displays a respective two-dimensional image. Each eye of the viewer may receive a different one of the two-dimensional images, resulting in a perceived three-dimensional image. The electronic device may include display pipeline circuitry that generates and processes content to be displayed on the lenticular display. Content generating circuitry may initially generate content that includes a plurality of two-dimensional images, each two-dimensional image corresponding to a respective viewing zone. Pre-processing circuitry may subsequently anisotropically resize each two-dimensional image. Pixel mapping circuitry may then be used to map the resized two-dimensional images to the array of pixels in the lenticular display.