# US 12,217,664 B2 · Under-display camera assembly and corresponding terminal device

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- Number: US 12,217,664 B2
- Document ID: US12217664B2
- Status: Granted
- Kind: B2
- Application number: 17/599,194
- Filed: 2020-02-25
- Published: 2022-06-23
- Granted: 2025-02-04
- Earliest claimed: 2019-03-28
- Assignees: Ningbo Sunny Opotech Co., Ltd.
- Applicants: Ningbo Sunny Opotech Co., Ltd
- Inventors: Xudong Wu; Liao Jing; Siyuan Liu
- Web page: https://patentgrep.com/patent/US12217664B2

## CPC

- G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED]
- G02B 5/005: {Diaphragms (for cameras G03B9/02)}
- G02B 7/021: {for more than one lens}
- G03B 9/02: Diaphragms
- G03B 30/00: Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
- H04M 1/0264: {for a camera module assembly}
- H04N 23/55: Optical parts specially adapted for electronic image sensors; Mounting thereof
- H04N 23/57: Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
- H10K 59/65: OLEDs integrated with inorganic image sensors
- G06V 10/14: Optical characteristics of the device performing the acquisition or on the illumination arrangements
- H04M 1/0266: {for a display module assembly}
- G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G03B: APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR (optical parts of such apparatus G02B; photosensitive materials or processes for photographic purposes G03C; apparatus for processing exposed photographic materials G03D)
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES
- G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING

## Abstract

The present application provides an under-display camera assembly, including: an organic light-emitting diode display screen, wherein a display region of said display screen includes an under-display camera region and a non-under-display camera region, and a pixel density of the under-display camera region is configured to be less than that of the non-under-display camera region; and a camera module located at a rear end of the under-display camera region, and including an iris diaphragm, a lens group, and a photosensitive component, wherein the iris diaphragm is provided between a bottom surface of a pixel light-emission layer and a top surface of the foremost lens of the lens group, and has a closed state and a transmission state. The iris diaphragm, in the closed state, reflects light from the display screen or emits light by itself from the front of the display screen, and the transmission state refers to a state in which a light path of the camera module is opened. The application further provides a corresponding terminal device. The application can produce full-screen display effects, provide an added aperture adjustment function, and facilitate alignment during an assembly process.

## Claims

### Claim 1

An under-display camera assembly, characterized by comprising:
an organic light-emitting diode display screen, a display area of which includes an under-display camera area and a non-under-display camera area, wherein a pixel density of the under-display camera area is set to be smaller than a pixel density of the non-under-display camera area; and
a camera module, an optical axis of which is perpendicular to a surface of the organic light-emitting diode display screen, and the camera module being located at a rear end of the under-display camera area, and the camera module including an iris diaphragm, a lens group and a photosensitive assembly,
wherein the organic light-emitting diode display screen includes a pixel light-emitting layer, and the iris diaphragm is provided between a bottom surface of the pixel light-emitting layer and a top surface of a foremost lens of the lens group, and the iris diaphragm has a closed state and a transmission state, and the iris is controllably switched between the closed state and a transmission state, and the closed state is a state in which the iris diaphragm closes an optical path of the camera module, and in the closed state, the iris diaphragm reflects light from the organic light-emitting diode display screen or the iris diaphragm itself emits light and the emitted light is emitted from the front of the organic light-emitting diode display screen, and the transmission state is a state in which the iris diaphragm opens the light path of the camera module.

### Claim 2 (depends on 1)

The under-display camera assembly according to claim 1, wherein, the closed state is a reflective state, and the under-display camera assembly further includes a switching control unit, which is used to control the iris diaphragm to switch to the transmission state under the working state of the camera module, and to control the iris diaphragm to switch to the reflection state under the non-working state of the camera module.

### Claim 3 (depends on 2)

The under-display camera assembly according to claim 2, wherein, the camera module further includes a lens barrel, and the lens group is installed on an inner side surface of the lens barrel.

### Claim 4 (depends on 3)

The under-display camera assembly according to claim 3, wherein, the iris diaphragm includes a first lens holder and a plurality of movable blades installed on the first lens holder, and an upper surface of the movable blade has a reflective film, and the reflective state is achieved by closing the plurality of movable blades together, and the transmission state is achieved by accommodating the plurality of movable blades in the first lens holder.

### Claim 5 (depends on 4)

The under-display camera assembly according to claim 4, wherein, a top surface of the first lens holder bears against a bottom surface of the organic light-emitting diode display screen, and a bottom surface of the first lens holder bears against a top surface of the lens barrel.

### Claim 6 (depends on 3)

The under-display camera assembly according to claim 3, wherein, the lens barrel includes:
a lens group installation section, the lens group being installed on an inner side surface of the lens group installation section; and
an extension section, which is formed by extending upward from a top portion of the lens group installation section, and a top surface of the extension section bears against the bottom surface of the organic light-emitting diode display screen.

### Claim 7 (depends on 6)

The under-display camera assembly according to claim 6, wherein, the iris diaphragm is installed on the extension section.

### Claim 8 (depends on 6)

The under-display camera assembly according to claim 6, wherein, the iris diaphragm is installed on the bottom surface of the organic light-emitting diode display screen, and there is no gap between an outer side surface of the iris diaphragm and an inner side surface of the extension section, or the gap between the outer side surface of the iris diaphragm and the inner side surface of the extension section is blocked by a black object.

### Claim 9 (depends on 5)

The under-display camera assembly according to claim 5, wherein, a height of the first lens holder is determined based on a total optical length of the camera module, and a distance from a photosensitive surface of the camera module to a bottom installation surface of the camera module, and a distance from the bottom installation surface of the camera module to the bottom surface of the organic light-emitting diode display screen, and the height is a size in an optical axis direction of the camera module.

### Claim 10 (depends on 6)

The under-display camera assembly according to claim 6, wherein, a height of the extension section is determined based on the total optical length of the camera module, the distance from the photosensitive surface of the camera module to the bottom installation surface of the camera module, and the distance from the installation surface of the camera module to the bottom surface of the organic light-emitting diode display screen, and the height is a size in the optical axis direction.

### Claim 11 (depends on 6)

The under-display camera assembly according to claim 6, wherein, the organic light-emitting diode display screen has a back plate, and the bottom surface of the organic light-emitting diode display screen is a bottom surface of the back plate, or a position of the back plate corresponding to under-display camera area is removed, and the bottom surface of the organic light-emitting diode display screen is a bottom surface of the organic light-emitting diode display screen exposed after the back plate is removed.

### Claim 12 (depends on 6)

The under-display camera assembly according to claim 6, wherein, a top portion of the extension section has an expansion portion formed by extending along a radial direction, so that a width of the top surface of the extension section is larger than an average thickness of the extension section, and the radial direction is a direction perpendicular to the optical axis, and the width of the top surface is a size of the top surface in the radial direction.

### Claim 13 (depends on 1)

The under-display camera assembly according to claim 1, wherein, the iris diaphragm includes a MEMS micro-mirror or a highly elastic reflective film.

### Claim 14 (depends on 1)

The under-display camera assembly according to claim 1, wherein, a pixel pitch of the under-display camera area is set to be greater than a pixel pitch of the non-under-display camera area, and the pixel pitch is a pitch between light-emitting structures of adjacent pixels of the organic light-emitting diode display screen.

### Claim 15 (depends on 1)

The under-display camera assembly according to claim 1, wherein, the under-display camera assembly further includes a first control unit, which is used to control both of the under-display camera area and the non-under-display camera area to display images under the non-working state of the camera module, and to control a display function of the under-display camera area to be turned off under the working state of the camera module.

### Claim 16 (depends on 1)

The under-display camera assembly according to claim 1, wherein, the under-display camera assembly further includes a second control unit, which is used to compensate brightness of the under-display camera area when both of the under-display camera area and the non-under-display camera area display images.

### Claim 17 (depends on 1)

The under-display camera assembly according to claim 1, wherein, the under-display camera assembly further includes a second control unit, which is used to compensate a display parameter of the under-display camera area when both of the under-display camera area and the non-under-display camera area display images, so that the displayed image transits smoothly between the under-display camera area and the non-under-display camera area.

### Claim 18 (depends on 1)

A terminal device, characterized by comprising the under-display camera assembly according to claim 1.

### Claim 19 (depends on 18)

The terminal device according to claim 18, wherein, the camera module is used as a front camera module of the terminal device, and the organic light-emitting diode display screen is used as a display panel on the front of the terminal device.