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Multi-focus Fresnel lens array and multi-view display device with same

A Fresnel lens and display device technology, applied to lenses, optics, instruments, etc., can solve problems such as single-person viewing, wide thickness of directional display systems, and limited viewing angles, so as to improve viewing experience and solve resolution problems. The effect of reducing the rate and expanding the viewing area

Active Publication Date: 2019-11-15
SUN YAT SEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies of the current technology, the purpose of the present invention is to provide a new type of multi-focus Fresnel lens array, which aims to solve the problems of the existing directional display system with too wide thickness, limited viewing angle, and limited viewing by a single person

Method used

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  • Multi-focus Fresnel lens array and multi-view display device with same
  • Multi-focus Fresnel lens array and multi-view display device with same
  • Multi-focus Fresnel lens array and multi-view display device with same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] figure 1 The multifocal Fresnel lens of this embodiment includes an entrance surface and an exit surface, and the exit surface includes three groups of Fresnel lens sub-arrays 1, 2, 3 with different lens unit structures. Inside the Fresnel lens sub-array of the same group.

[0063] In this embodiment, the first group of lens unit 1a and the second group of lens unit 1b of the first group of Fresnel lens sub-array 1, and the first group of lens unit 2a and the second group of lens unit 2a of the second group of Fresnel lens sub-array 2 The two groups of lens units 2b, the first group of lens units 3a and the second group of lens units 3b of the third group of Fresnel lens sub-array 3, each lens unit of the same group of Fresnel lens sub-array has the same surface sawtooth distribution .

[0064] Wherein, the lens unit includes:

[0065] Such as figure 1 As shown in the partial enlarged view, in a Fresnel lens unit 2a, along the direction from the center of the lens unit to th...

Embodiment 2

[0075] Such as Figure 5 What is shown is a multi-view display screen structure based on a multi-focus Fresnel lens array, including a multi-focus Fresnel lens array, a liquid crystal layer 10, a light guide layer, a backlight layer, and the like.

[0076] The light guide layer includes: a first light guide layer 17, a first optical film 16, a second light guide layer 15, a third light guide layer 12, and a second optical film 11.

[0077] The light emitted from the first light guide layer 17 diffuses and enhances reflection, forming a columnar light source.

[0078] The first optical film 16 directs the emission center direction of the emitted light toward the lens, which improves energy efficiency and reduces light reflection.

[0079] The light emitted from the second light guide layer 15 diffuses twice to eliminate the periodic characteristics of the first optical film and prevent light reflection.

[0080] The third light guide layer 12 increases the optical length, reduces the sys...

Embodiment 3

[0086] The following describes a display device according to an embodiment of the present invention, which includes the multi-focus Fresnel lens and the display screen (multi-view display device) described in the above-mentioned Embodiment 1 and Embodiment 2.

[0087] Figure 7 Shown is the dual-view effect diagram of applying the multifocal Fresnel lens. The backlight unit cooperates with the optical structure composed of the multi-focus Fresnel lens of the present invention to form two viewing zones, each of which has a wider viewing range.

[0088] The multi-view display device is applied in the field of on-board display. With the support of dual-view technology, it provides two positions for viewing the same resolution as the screen, but with different screen content. The driver can complete map navigation, road condition query and other operations through the on-board dual-view display, while the co-pilot can watch movies, variety shows and so on. When the image is presented,...

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Abstract

The invention discloses a multi-focus Fresnel lens array and a multi-view display device with the same. The multi-focus Fresnel lens array is formed by splicing 3 groups or more of Fresnel lens sub-arrays with different lens unit structures; each lens sub-array is formed by periodically arranging a series of lens units; in the lens unit, there are 2 or more types of saw teeth, each type of saw tooth has the same focal point; and the saw teeth of different models have the same height and different widths and are arranged in a staggered mode. The multi-focus Fresnel lens array and the display device, provided by the invention, can solve the problems of reduced resolution, high cost, thickness, visual angle range and the like of the conventional multi-vision display device, such as double-vision display device and the like, and simultaneously broadens the application of multi-vision display, so that the display is more intelligent and more efficient.

Description

Technical field [0001] The invention relates to a multi-focus Fresnel lens, belonging to the field of directional displays, and in particular to a multi-focus Fresnel lens array and a multi-view display device with the focus Fresnel lens array. Background technique [0002] Fresnel lens has many fine tooth patterns arranged on the surface, which has a focusing effect. Because of its low cost and portability, it is widely used in optical path design. At present, the existing single-focus Fresnel lens is applied to a directional display, and the viewing angle is small, which limits the area range of the best viewing position, and the brightness of the image outside the best viewing area is low, and it is even impossible to view the normal image. [0003] In addition, the prior art directional backlight display is thick and bulky. Therefore, it is necessary to design a short-focus, multi-focus Fresnel lens to be used on the display to reduce the thickness of the display and obtain a w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B3/00G02B27/22H04N13/302
CPCG02B3/0037G02B3/0043H04N13/302
Inventor 李焜阳赵官文周建英陈学浩李晓克程朦依丁娟张瀚韬陈铭俊
Owner SUN YAT SEN UNIV
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