# US 2018/0321499 A1 · Holographic display panel and holographic display device

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- Number: US 2018/0321499 A1
- Document ID: US20180321499A1
- Status: Published application
- Kind: A1
- Application number: 15/772,208
- Filed: 2017-11-10
- Published: 2018-11-08
- Earliest claimed: 2016-09-09
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: Boe Technology Group Co., Ltd.
- Inventors: Jifeng TAN
- Web page: https://patentgrep.com/patent/US20180321499A1

## CPC

- G02B 30/00: Optical systems or apparatus for producing three-dimensional [3D] effects, e.g. stereoscopic images (in microscopes G02B21/22)
- G02B 26/06: for controlling the phase of light (G02B26/08 takes precedence {, measuring optical phase difference G01J9/00})
- G02B 26/0808: {by means of one or more diffracting elements}
- G03H 1/02: Details {of features involved during the holographic process; Replication of holograms without interference recording}
- G03H 1/08: Synthesising holograms, {i.e. holograms synthesized from objects or objects from holograms}(using electric digital computers G06F; G06T)
- G03H 1/0841: {Encoding method mapping the synthesized field into a restricted set of values representative of the modulator parameters, e.g. detour phase coding}
- G03H 1/2249: {Holobject properties}
- G03H 1/2294: {Addressing the hologram to an active spatial light modulator}
- G03H 2001/0224: {Active addressable light modulator, i.e. Spatial Light Modulator [SLM]}
- G03H 2001/2297: {using frame sequential, e.g. for reducing speckle noise}
- G03H 2001/2655: {Time multiplexing, i.e. consecutive records wherein the period between records is pertinent per se}
- G03H 2210/454: into planes
- G03H 2223/12: Amplitude mask, e.g. diaphragm, Louver filter
- G03H 2223/13: Phase mask
- G03H 2225/55: Having optical element registered to each pixel
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03H: HOLOGRAPHIC PROCESSES OR APPARATUS (holograms, e.g. point holograms, used as ordinary optical elements G02B5/32; producing stereoscopic or other three-dimensional effects G02B30/00; diffraction-grating systems G02B27/44; systems using moiré fringes G02B27/60; optical logic elements G02F3/00; stereo-photography G03B35/00; photosensitive materials or processes for photographic purposes G03C; {stereo-photographic or similar processes G03C9/00}; apparatus for processing exposed photographic materials G03D; analogue computers performing mathematical operations with the aid of optical elements G06E3/00; authentication by radiation, of concealed information carried by holograms or diffraction gratings G06K19/16; holographic storage G11B7/0065, G11C13/04; {stereoscopic or other three dimensional effects in television systems H04N13/00})

## Abstract

A holographic display panel, a holographic display device, and a holographic display method are disclosed. The holographic display panel includes a plurality of sub-pixels arranged in an array and a phase plate disposed on a light exit side of the plurality of sub-pixels; and a blocking member disposed between the plurality of sub-pixels and the phase plate; an orthogonal projection of the blocking member on a plane where the plurality of sub-pixels are located is arranged between adjacent sub-pixels for blocking an edge portion of a light beam diffracted by the sub-pixel.

## Claims

### Claim 1

A holographic display panel comprising:
a plurality of sub-pixels arranged in an array and a phase plate disposed on a light exit side of the plurality of sub-pixels; and
a blocking member disposed between the plurality of sub-pixels and the phase plate; wherein an orthogonal projection of the blocking member on a plane where the plurality of sub-pixels is located is arranged between adjacent sub-pixels for blocking an edge portion of a light beam diffracted by the sub-pixel.

### Claim 2 (depends on 1)

The holographic display panel according to claim 1, wherein a width a of the blocking member satisfies: a=0.61λd/w, where λ is a wavelength of the light beam, w is a width of the sub-pixel, and d is a distance between the blocking member and the sub-pixel.

### Claim 3 (depends on 1)

The holographic display panel according to claim 1, further comprising a first substrate disposed on the light exit side of the plurality of sub-pixels; wherein the phase plate is disposed on a surface of the first substrate facing away from the plurality of sub-pixels, and the blocking member is disposed on a surface of the first substrate facing the plurality of sub-pixels.

### Claim 4 (depends on 1)

The holographic display panel according to claim 1, further comprising a color film substrate disposed on the light exit side of the plurality of sub-pixels; wherein the blocking member is disposed on a surface of the color film substrate facing away from the plurality of sub-pixels.

### Claim 5 (depends on 1)

The holographic display panel according to claim 1, wherein the phase plate comprises a plurality of sub-phase plates corresponding to the plurality of sub-pixels one-to-one.

### Claim 6 (depends on 5)

The holographic display panel according to claim 5, wherein the phase plate is a diffraction grating.

### Claim 7 (depends on 1)

The holographic display panel according to claim 1, further comprising a plurality of depth display units; wherein each depth display unit comprises at least two adjacent pixels, and each pixel comprises a plurality of sub-pixels; each depth display unit further comprises a plurality of phase plates, each sub-pixel corresponds to a phase plate along a direction of light emitted from the sub-pixel, the phase plate is configured to control a diffraction angle of light emitted through the phase plate; wherein phase plates corresponding to sub-pixels of a same pixel have a same diffraction angle, diffraction angles of light beams emitted by different pixels in a same depth display unit after passing through the phase plate are different, so that reverse extension lines of the light beams emitted from the same depth display unit intersect at a depth position.

### Claim 8 (depends on 7)

The holographic display panel according to claim 7, wherein the plurality of depth display units are divided into display groups arranged in an array, each display group is composed of at least two depth display units adjacent to each other; wherein depths of field of depth display units in a same display group are different.

### Claim 9 (depends on 8)

The holographic display panel according to claim 8, wherein two adjacent depth display units have different depths of field.

### Claim 10 (depends on 1)

A holographic display device comprising the holographic display panel according to claim 1.

### Claim 11 (depends on 10)

The holographic display device according to claim 10, wherein a width a of the blocking member satisfies: a=0.61λd/w, where λ is a wavelength of the light beam, w is a width of the sub-pixel, and d is a distance between the blocking member and the sub-pixel.

### Claim 12 (depends on 10)

The holographic display device according to claim 10, further comprising a first substrate disposed on the light exit side of the plurality of sub-pixels; wherein the phase plate is disposed on a surface of the first substrate facing away from the plurality of sub-pixels, and the blocking member is disposed on a surface of the first substrate facing the plurality of sub-pixels.

### Claim 13 (depends on 10)

The holographic display device according to claim 10, further comprising a color film substrate disposed on the light exit side of the plurality of sub-pixels; wherein the blocking member is disposed on a surface of the color film substrate facing away from the plurality of sub-pixels.

### Claim 14 (depends on 10)

The holographic display device according to claim 10, wherein the phase plate comprises a plurality of sub-phase plates corresponding to the plurality of sub-pixels one-to-one.

### Claim 15 (depends on 14)

The holographic display device according to claim 14, wherein the phase plate is a diffraction grating.

### Claim 16 (depends on 11)

The holographic display device according to claim 11, wherein the phase plate comprises a plurality of sub-phase plates corresponding to the plurality of sub-pixels one-to-one.

### Claim 17 (depends on 10)

The holographic display device according to claim 10, further comprising a plurality of depth display units; wherein each depth display unit comprises at least two adjacent pixels, and each pixel comprises a plurality of sub-pixels; each depth display unit further comprises a plurality of phase plates, each sub-pixel corresponds to a phase plate along a direction of light emitted from the sub-pixel, the phase plate is configured to control a diffraction angle of light emitted through the phase plate; wherein phase plates corresponding to sub-pixels of a same pixel have a same diffraction angle, diffraction angles of light beams emitted by different pixels in a same depth display unit after passing through the phase plate are different, so that reverse extension lines of the light beams emitted from the same depth display unit intersect at a depth position.

### Claim 18 (depends on 17)

The holographic display device according to claim 17, wherein the plurality of depth display units are divided into display groups arranged in an array, each display group is composed of at least two depth display units adjacent to each other; wherein depths of field of depth display units in a same display group are different.

### Claim 19 (depends on 18)

The holographic display device according to claim 18, wherein two adjacent depth display units have different depths of field.

### Claim 20 (depends on 11)

The holographic display device according to claim 11, further comprising a plurality of depth display units; wherein each depth display unit comprises at least two adjacent pixels, and each pixel comprises a plurality of sub-pixels; each depth display unit further comprises a plurality of phase plates, each sub-pixel corresponds to a phase plate along a direction of light emitted from the sub-pixel, the phase plate is configured to control a diffraction angle of light emitted through the phase plate; wherein phase plates corresponding to sub-pixels of a same pixel have a same diffraction angle, diffraction angles of light beams emitted by different pixels in a same depth display unit after passing through the phase plate are different, so that reverse extension lines of the light beams emitted from the same depth display unit intersect at a depth position.