Autostereoscopic Display Light Intensity Gradient
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Solution Overview
Problem
Autostereoscopic displays with optical magnification suffer from spatial resolution loss and light intensity variations, leading to visible banding and sub-pixel structure visibility, which affects the aesthetic quality and viewer experience.
Innovation Solution
The display elements have a light intensity distribution with at least two non-zero levels, a higher intensity at the center and a lower intensity at the periphery, achieved by varying the light emission intensity across each display element, using electroluminescent materials and optical components like filters, allowing for a standard pixel layout while reducing banding and sub-pixel visibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If optical magnification is applied to autostereoscopic display, then viewing freedom and stereoscopic effect are improved, but spatial resolution is lost and sub-pixel structure becomes visible
Solution Approach 1:
The patent applies different light intensity characteristics to different regions within each display element. The center region has higher light intensity while the periphery has lower light intensity, creating a gradient that masks the visibility of sub-pixel structures under magnification while preserving the stereoscopic viewing freedom provided by the optical magnification.
2Adaptability or versatility
If lenticular sheet is used for autostereoscopic display, then stereoscopic image is achieved, but light intensity variations and banding occur
Solution Approach 1:
The patent modifies the light emission characteristics of display elements by creating a non-uniform intensity distribution within each element, with the center being brighter than the periphery. This local differentiation compensates for the light intensity variations and banding effects introduced by the lenticular sheet, resulting in a more uniform overall appearance while maintaining the stereoscopic effect.
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
This approach results in a smooth emission intensity distribution even under significant magnification, reducing the visibility of abrupt pixel edges and banding, enhancing the aesthetic quality and viewer experience by minimizing light intensity variations and sub-pixel structure visibility.
Implementation Method 1
achieved by varying the light emission intensity across each display element, using electroluminescent materials and optical components like filters
Implementation Method 2
A lenticular sheet, for example in the form of a moulded or machined sheet of polymer material, overlies the output side of the display panel, with its lenticular elements, comprising (semi) cylindrical lens elements
Data Source
AI summary
An autostereoscopic display device has display elements, each of which has an output light intensity distribution which has at least two non-zero light intensity levels, comprising a first light intensity at the centre of the display element area and a second lower light intensity at a periphery of the display element area. This means the light intensity drops more gradually at the pixel edges, so that the abrupt pixel edges are less visible despite the magnification provided by a lens arrangement of the autostereoscopic display device.