# US 11,994,696 B2 · Method for manufacturing naked-eye 3D device, and naked-eye 3D device

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- Number: US 11,994,696 B2
- Document ID: US11994696B2
- Status: Granted
- Kind: B2
- Application number: 17/483,530
- Filed: 2021-09-23
- Published: 2022-05-19
- Granted: 2024-05-28
- Earliest claimed: 2020-11-19
- Assignees: Boe Technology Group Co., Ltd.
- Applicants: BOE Technology Group Co., Ltd.
- Inventors: Kang Guo; Renquan Gu; Xin Gu; Feng Zhang; Meili Wang; Guangcai Yuan; Xue Dong; Mengya Song; Duohui Li; Qi Yao; Jing Yu
- Web page: https://patentgrep.com/patent/US11994696B2

## CPC

- G02B 30/27: involving lenticular arrays
- H04N 13/305: using lenticular lenses, e.g. arrangements of cylindrical lenses
- H04N 13/307: using fly-eye lenses, e.g. arrangements of circular lenses
- G02F 1/133374: {for displaying permanent signs or marks}
- G02F 1/133526: {Lenses, e.g. microlenses or Fresnel lenses}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS

## Abstract

Embodiments of the present application disclose a method for manufacturing a naked-eye 3D device and a naked-eye 3D device. The method includes: forming a display module including a plurality of pixel islands; forming a spacer layer on the display module; and forming a micro-lens array on the spacer layer, wherein the spacer layer is formed to have a thickness such that the plurality of pixel islands are located at a focal plane of the micro-lens array. The method further includes: forming an alignment mark between the spacer layer and the display module, wherein the alignment mark is used for, when forming the micro-lens array, aligning each micro-lens in the micro-lens array with one of the plurality of pixel islands.

## Claims

### Claim 1

A method for manufacturing a naked-eye 3D device, comprising:
forming a display module including a plurality of pixel islands;
forming a spacer layer on the display module; and
forming a micro-lens array on the spacer layer, wherein the spacer layer is formed to have a thickness such that the plurality of pixel islands are located at a focal plane of the micro-lens array;
wherein the method further includes:
forming an alignment mark between the spacer layer and the display module, wherein the alignment mark is used for, when forming the micro-lens array, aligning each micro-lens in the micro-lens array with one of the plurality of pixel islands.

### Claim 2 (depends on 1)

The method of claim 1, wherein the forming the spacer layer on the display module, includes: forming a plurality of spacer layers;
the method further includes:
forming an alignment mark between every two layers of spacer layers of the plurality of spacer layers, wherein the number of layers of spacer layers is related to a focal length of the micro-lens array to be formed.

### Claim 3 (depends on 2)

The method of claim 2, wherein orthographic projections of alignment marks in different layers onto the display module do not coincide each other.

### Claim 4 (depends on 1)

The method of claim 1, wherein the forming the micro-lens array on the spacer layer, includes:
forming micro-lenses in contact with each other; or,
forming micro-lenses that are not in contact with each other, and forming a black matrix between the micro-lenses.

### Claim 5 (depends on 1)

The method of claim 1, wherein the forming the display module, includes:
forming an LCD module, wherein the LCD module includes a lower polarizer, an array substrate, a color filter substrate, and a liquid crystal layer encapsulated between the array substrate and the color filter substrate.

### Claim 6 (depends on 5)

The method of claim 5, wherein the forming the alignment mark between the spacer layer and the display module, includes:
forming a metal layer on the color filter substrate; and
patterning the metal layer to form the alignment mark.

### Claim 7 (depends on 5)

The method of claim 5, further comprising:
forming a planarization layer covering the micro-lens array, wherein the planarization layer has a refractive index smaller than a refractive index of the micro-lens; and
forming an upper polarizer on the planarization layer.

### Claim 8 (depends on 1)

The method of claim 1, wherein the forming the display module, includes:
forming an OLED module or a micro-led display module, wherein the OLED module or the micro-led display module includes a TFT circuit layer, a light-emitting layer, and an encapsulation layer.

### Claim 9 (depends on 8)

The method of claim 8, wherein the forming the alignment mark between the spacer layer and the display module, includes:
forming a metal layer on the encapsulation layer; and
patterning the metal layer to form the alignment mark.

### Claim 10 (depends on 8)

The method of claim 8, further comprising:
forming a planarization layer covering the micro-lens array, wherein the planarization layer has a refractive index smaller than a refractive index of the micro-lens.

### Claim 11 (depends on 1)

The method of claim 1, wherein the forming the micro-lens array on the spacer layer, includes:
forming the micro-lens array on the spacer layer by using a photolithography apparatus according to the alignment mark between the spacer layer and the display module.

### Claim 12

A naked-eye 3D device, comprising:
a display module including a plurality of pixel islands;
a spacer layer on the display module; and
a micro-lens array on the spacer layer, wherein the spacer layer has such a thickness that the plurality of pixel islands are located at a focal plane of the micro-lens array;
wherein the device further includes:
an alignment mark between the spacer layer and the display module, wherein the alignment mark is used for aligning each micro-lens in the micro-lens array with one pixel island when forming the micro-lens array.

### Claim 13 (depends on 12)

The device of claim 12, wherein there is a plurality layers of spacer layers, and
the device further includes an alignment mark between every two layers of spacer layers of the plurality of spacer layers, wherein the number of layers of spacer layers is related to a focal length of the micro-lens array.

### Claim 14 (depends on 13)

The device of claim 13, wherein orthographic projections of alignment marks in different layers onto the display module do not coincide with each other.

### Claim 15 (depends on 12)

The device of claim 12, wherein the display module is an LCD module; the display module includes a lower polarizer, an array substrate, a color filter substrate, and a liquid crystal layer encapsulated between the array substrate and the color filter substrate.

### Claim 16 (depends on 15)

The device of claim 15, wherein the device further includes a planarization layer covering the micro-lens array; and the planarization layer has a refractive index smaller than a refractive index of the micro-lens.

### Claim 17 (depends on 16)

The device of claim 16, wherein the device further includes an upper polarizer on the planarization layer.

### Claim 18 (depends on 12)

The device of claim 12, wherein the display module is an OLED module or a micro-led display module; the OLED module or the micro-led display module includes a TFT circuit layer, a light-emitting layer, and an encapsulation layer; and
the device further includes a planarization layer covering the micro-lens array, wherein the planarization layer has a refractive index smaller than a refractive index of the micro-lens.

### Claim 19 (depends on 12)

The device of claim 12, wherein the micro-lens array includes:
micro-lenses in contact with each other.

### Claim 20 (depends on 12)

The device of claim 12, wherein the micro-lens array includes:
micro-lenses that are not in contact with each other, and a black matrix between the micro-lenses.