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Lens with gradient

A lens and non-gradient technology, applied in stereoscopic systems, image communication, instruments, etc., can solve problems such as deviation, large crosstalk, and poor image quality

Pending Publication Date: 2021-08-24
ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at short distances, the viewing angle at the edge of the display deviates significantly from the normal of the display
The viewer will then experience poorer image quality, especially greater crosstalk (i.e. light intended for one eye is seen by the other)

Method used

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  • Lens with gradient
  • Lens with gradient
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Examples

Experimental program
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Embodiment Construction

[0017] In this specification, a particular quantity (eg, focal length, refractive index, or curvature) decreases or increases according to position on the array of elongated lens elements, typically with a gradual change in character (ie, stepwise). This is because such variables are constant for a single lens element, but vary for subsequent lens elements, e.g., within a particular set of adjacent lens elements, each subsequent lens element has slightly increased or decreased focal length, refractive rate or curvature. In this specification, the term gradually changing (gradually) is used to indicate such an increase or decrease.

[0018] Elements in the figures are illustrated for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements to help improve understanding of the optical effects of the invention and to provide a clear distinction from lenses...

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Abstract

The invention provides a lens. The lens comprises an array of elongate lens elements extending parallel to each other, said array comprising a first edge and a second edge extending parallel to the elongate lens elements; and a centerline (4) centered between the first edge and the second edge; the focal lengths of the lens elements gradually decrease from the first edge of the array to the centerline and from the second edge of the array to the centerline. This improves the angular performance of the lens such that the image quality near the display edge is not compromised at a short viewing distance.

Description

technical field [0001] The invention relates to a lens and an autostereoscopic display device comprising such a lens. Background technique [0002] Autostereoscopic displays have attracted a great deal of attention over the past two decades. In one approach, a display with rows and columns of pixels is integrated with a lens stack. Such stacks are typically formed from an array of semi-cylindrical microlenses, which arrays are often called lens elements or lenses (the arrays are often called lenses or lens arrangements). Each lens is then associated with a set of at least two columns of pixels extending parallel to the lens, or at an angle thereto. The focusing effect of each lens enables the output from different columns of pixels to be directed to different spatial locations in front of the display. This allows the transmission of an image exclusively for the left eye and an image exclusively for the right eye, which enables the viewer to perceive stereoscopic images. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B30/27
CPCH04N13/305G02B30/27G02B30/29
Inventor 简·范德霍斯特西尔维诺何塞安图纳·普雷萨巴斯科恩·博格曼
Owner ZHANGJIAGANG KANGDE XIN OPTRONICS MATERIAL
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