# US 2017/0285357 A1 · Multi-view display device

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- Number: US 2017/0285357 A1
- Document ID: US20170285357A1
- Status: Published application
- Kind: A1
- Application number: 15/238,719
- Filed: 2016-08-16
- Published: 2017-10-05
- Earliest claimed: 2016-03-30
- Assignees: Delta Electronics, Inc.
- Applicants: Delta Electronics, Inc.
- Inventors: June-Jei HUANG
- Web page: https://patentgrep.com/patent/US20170285357A1

## CPC

- H04N 13/305: using lenticular lenses, e.g. arrangements of cylindrical lenses
- G02B 3/0062: {Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between}
- G02B 3/08: with discontinuous faces, e.g. Fresnel lens {(diffractive Fresnel lenses G02B5/1876)}
- G02B 5/0278: {used in transmission}
- G02B 30/27: involving lenticular arrays
- G02B 30/29: characterised by the geometry of the lenticular array, e.g. slanted arrays, irregular arrays or arrays of varying shape or size
- H04N 13/317: using slanted parallax optics
- H04N 13/354: for displaying sequentially
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A multi-view display device is provided, and the multi-view display device at least comprises a projector, a first lens set, and a second lens set. The projector contains a scan-lamp image, and the projector slants an incident ray corresponding to the scan-lamp image with a first angle. The first lens set receives the slanted incident ray and refracts that. The second lens set is slanted with the first angle, and the second lens set receives the slanted incident ray which is refracted by the first lens set and refracts that again, so as to expand a view area of the multi-view display device.

## Claims

### Claim 1

A multi-view display device providing a spatial-multiplex number of M×N required to be added by a user, wherein M is a number of horizontal pixels, N is a number of vertical pixels, M and N are positive integers, the multi-view display device comprises:
a projector containing a scan-lamp image, the projector slanting an incident ray corresponding to the scan-lamp image with a first angle; and
a first lens set constituted by a lens array receiving the slanted incident ray and refracting the slanted incident ray; and
a second lens set constituted by a lenticular lens array, the second lens set being slanted with the first angle and receiving the slanted incident ray refracted by the first lens set and refracting the slanted incident ray refracted by the first lens set to allow a view area of the multi-view display device to have the spatial-multiplex number of M×N.

### Claim 2 (depends on 1)

The multi-view display device of claim 1, wherein the first angle is defined as tan−1(1/N)°.

### Claim 3 (depends on 1)

The multi-view display device of claim 1, further comprising:
a Fresnel lens disposed between the projector and the first lens, wherein the Fresnel lens is set for focusing the incident ray.

### Claim 4 (depends on 1)

The multi-view display device of claim 1, further comprising:
a vertical diffuser receiving and diffusing the slanted incident ray refracted by the first lens set and refracted by the second lens set and diffusing to allow the view area of the multi-view display device to have the spatial-multiplex number of M×N.

### Claim 5 (depends on 1)

The multi-view display device of claim 1, wherein the projector has a time-multiplex function.

### Claim 6 (depends on 5)

The multi-view display device of claim 5, wherein a number of spots scanned by the projector is X so that the number of the spots in the view area of the multi-view display device is M×N×X, where X is a positive integer.

### Claim 7 (depends on 1)

The multi-view display device of claim 1, wherein a length D of the scan-lamp image is defined as cos(the first angle)/N*(a screen pixel size).

### Claim 8 (depends on 7)

The multi-view display device of claim 7, wherein a pitch of the second lens set L is M*N*D.

### Claim 9 (depends on 6)

The multi-view display device of claim 6, wherein when the number of the spots in the view area of the multi-view display device is M×N×X, a resolution of the multi-view display device is reduced down to 1/M×N.

### Claim 10 (depends on 1)

The multi-view display device of claim 1, wherein the first lens set is formed by superimposing an X-lenticular lens array and a Y-lenticular lens array.