# US 2018/0024372 A1 · Stereo display device

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- Number: US 2018/0024372 A1
- Document ID: US20180024372A1
- Status: Published application
- Kind: A1
- Application number: 15/352,534
- Filed: 2016-11-15
- Published: 2018-01-25
- Earliest claimed: 2016-07-20
- Assignees: Delta Electronics, Inc.
- Applicants: Delta Electronics, Inc.
- Inventors: June-Jei HUANG
- Web page: https://patentgrep.com/patent/US20180024372A1

## CPC

- 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
- G02B 3/005: {arranged along a single direction only, e.g. lenticular sheets (G02B3/0043 takes precedence)}
- G02B 3/0062: {Stacked lens arrays, i.e. refractive surfaces arranged in at least two planes, without structurally separate optical elements in-between}
- G02B 30/24: involving temporal multiplexing, e.g. using sequentially activated left and right shutters
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

A stereo display device includes a light source module, a display module, and first, second, and third lenticular lens. The light source module sequentially provides a plurality of groups of timing light. The first lenticular lens is disposed in front of the light source module. The second lenticular lens is disposed in front of the first lenticular lens. By two optical Fourier transforms performed by the first and second lenticular lens, different groups of timing light are respectively focus on different sub-regions of each of the pixels of the display module. The display module is disposed in front of the second lenticular lens and transforms the timing light focused on the pixels into a plurality of groups of pixel light. The third lenticular lens is disposed in front of the display module and directs the pixel light to a plurality of views.

## Claims

### Claim 1

A stereo display device, comprising:
a light source module configured to sequentially provide a plurality of groups of timing light;
a first lenticular lens disposed in front of the light source module and configured to respectively direct the timing light from the light source module to travel in a plurality of groups of directions, wherein the light source module is located on a focal plane of the first lenticular lens;
a second lenticular lens disposed in front of the first lenticular lens;
a display module disposed in front of the second lenticular lens, wherein the display module is located on a focal plane of the second lenticular lens, the display module comprises a plurality of pixels, each of the pixels comprises a plurality of sub-regions, the second lenticular lens is configured to focus the timing light traveling in the groups of the directions to a plurality of groups of focus regions, the focus regions respectively correspond to the sub-regions, and the display module is configured to transform the timing light focused on the focus regions into a plurality of groups of pixel light; and
a third lenticular lens disposed in front of the display module and configured to respectively direct the pixel light to a plurality of views.

### Claim 2 (depends on 1)

The stereo display device of claim 1, wherein the stereo display device has a first direction and a second direction perpendicular to the first direction, the pixels are disposed along the first direction and the second direction, the first lenticular lens has a plurality of first cylindrical lenses, the second lenticular lens has a plurality of second cylindrical lenses, the third lenticular lens has a plurality of third cylindrical lenses, the first cylindrical lenses are disposed slanted with respect to the first direction, the second cylindrical lenses are disposed slanted with respect to the first direction, and the third cylindrical lenses are disposed slanted with respect to the first direction.

### Claim 3 (depends on 2)

The stereo display device of claim 2, wherein a long axis of each of the first cylindrical lenses, a long axis of each of the second cylindrical lenses, and a long axis of each of the third cylindrical lenses are parallel to each other.

### Claim 4 (depends on 3)

The stereo display device of claim 3, wherein the display module is located on a focal plane of the third lenticular lens.

### Claim 5 (depends on 4)

The stereo display device of claim 4, wherein each of the first cylindrical lenses has a pitch along the first direction, each of the pixels comprises a plurality of sub-pixels, the sub-pixels have a spacing between adjacent two of the centers of the sub-pixels along the first direction, the first lenticular lens has a first focal length, the second lenticular lens has a second focal length, a ratio of the pitch and the spacing is the same with a ratio of the first focal length and the second focal length.

### Claim 6 (depends on 1)

The stereo display device of claim 1, wherein the light source module comprises a plurality of white light sources.

### Claim 7 (depends on 6)

The stereo display device of claim 6, wherein the first lenticular lens has a plurality of first cylindrical lenses, the stereo display device has a third direction perpendicular to a long axis of each of the first cylindrical lenses, each of the first cylindrical lenses is divided into K parts along the third direction, the parts respectively correspond to K groups of the white light sources, the first lenticular lens is configured to respectively direct K groups of the timing light to travel in K groups of the directions, each of the pixels comprises K sub-regions, the second lenticular lens is configured to respectively focus the K groups of the timing light traveling in the K groups of the directions to K groups of the focus regions, and the K groups of the focus regions respectively correspond to the K sub-regions.

### Claim 8 (depends on 1)

The stereo display device of claim 1, wherein the light source module comprises a plurality of red light sources, a plurality of green light sources, and a plurality of blue light sources.

### Claim 9 (depends on 8)

The stereo display device of claim 8, wherein the first lenticular lens has a plurality of first cylindrical lenses, the stereo display device has a third direction perpendicular to a long axis of each of the first cylindrical lenses, each of the first cylindrical lenses is divided into 3K parts along the third direction, the parts respectively correspond to K groups of the red light sources, K groups of the green light sources, and K groups of the blue light sources, the K groups of the red light sources, the K groups of the green light sources, and the K groups of the blue light sources form 3K groups of the timing light in K timings, the first lenticular lens is configured to respectively direct the 3K groups of the timing light to travel in 3K groups of the directions, each of the pixels comprises K sub-regions, each of the sub-regions comprises a red sub-pixel sub-region, a blue sub-pixel sub-region, and a green sub-pixel sub-region, the second lenticular lens is configured to respectively focus the 3K groups of the timing light traveling in the 3K groups of the directions to 3K groups of the focus regions, and the 3K groups of the focus regions respectively correspond to the K red sub-pixel sub-regions, the K blue sub-pixel sub-regions, and the K green sub-pixel sub-regions.

### Claim 10 (depends on 1)

The stereo display device of claim 1, wherein a number of the sub-regions is K, for each of the pixels, the K sub-regions respectively transform the timing light into K pixel light, and the third lenticular lens is configured to respectively direct the K pixel light to K views.