WO2021258921A1

WO2021258921A1 - Under-display screen camera device

Info

Publication number: WO2021258921A1
Application number: PCT/CN2021/094303
Authority: WO
Inventors: 王强
Original assignee: 中兴通讯股份有限公司
Priority date: 2020-06-23
Filing date: 2021-05-18
Publication date: 2021-12-30
Also published as: CN113840057A

Abstract

Embodiments of the present invention provide an under-display screen camera device. The device comprises: a display screen and a camera. The display screen is provided with a blind hole region. The camera is provided below the blind hole region. The display screen further comprises an electric field circuit. The electric field circuit drives, according to the change in the electric field, the liquid crystal in the blind hole region in the display screen to deflect, so as to change an optical path of light passing through the blind hole region, and achieve focusing of the camera. According to the present invention, the electric field circuit drives, according to the change in the electric field, the liquid crystal in the blind hole region in the display screen to deflect, an optical path of light passing through the blind hole region is changed, and focusing of the camera is achieved. Therefore, the problem in the related technology that a focusing solution is an independent camera system, large in volume, and not conducive to the ID modeling design is solved, thereby achieving the effect of realizing the focusing function without additionally increasing the size of a module.

Description

Camera device under display screen

Cross-references to related applications

This application is based on the Chinese patent application CN202010582904.5 filed on June 23, 2020, and claims the priority of the patent application, and all the contents disclosed therein are incorporated into this application by reference.

Technical field

The embodiments of the present invention relate to the technical field of terminals, and in particular, to a camera device under a display screen.

Background technique

In the era of full-screen mobile phones, with the rapid development of high-resolution selfie cameras, the self-portrait effect cannot be fully utilized due to the limitations of the full-screen ID. The high-pixel camera for selfies has a small depth of field, and without a focusing system, the selfie experience is poor. The traditional VCM focusing solution is bulky, which is not conducive to the ID design.

Summary of the invention

The embodiment of the present invention provides a camera device under the display screen, so as to at least solve the problem that the focusing solution in the related art is a camera independent system, which is large in size and is not conducive to ID modeling design.

According to an embodiment of the present invention, there is provided a camera device under the display screen, comprising: a display screen and a camera, the display screen is provided with a blind hole area, and the camera is arranged below the blind hole area, wherein The display screen further includes an electric field circuit, which drives the deflection of the liquid crystal in the blind hole area of the display screen through the change of the electric field, so as to change the optical path of the light passing through the blind hole area to realize the focusing of the camera.

In an exemplary embodiment, the display screen includes a cover at the top and a display module under the cover. The display module includes a liquid crystal layer and a backlight layer. An opening is provided on the opening, the liquid crystal layer above the opening forms the blind hole area, and the electric field circuit is provided on the ITO glass layer of the outermost layer of the liquid crystal layer.

Further, it further includes: a driving circuit arranged inside the camera or arranged on the display module, electrically connected to the electric field circuit, and configured to adjust the voltage of the electric field circuit to generate electric field changes.

Further, the deflection of the liquid crystal in the blind hole region in the liquid crystal layer changes the refractive index distribution of the liquid crystal layer.

In an exemplary embodiment, the camera is a fixed focus camera.

In an exemplary embodiment, the device further includes: a sealing ring disposed between the camera and the display screen.

In an exemplary embodiment, the electric field generated by the electric field circuit covers the field of view of the camera.

In an exemplary embodiment, the lens of the camera is located in the opening of the backlight layer.

In an exemplary embodiment, the driving circuit is electrically connected to the circuit board of the camera.

In an exemplary embodiment, the center of the blind hole area of the liquid crystal layer is aligned with the center of the aperture of the backlight layer and the center of the camera lens, and the blind hole area of the liquid crystal layer is larger than the aperture of the backlight layer. .

Through the above-mentioned embodiments of the present invention, since the electric field circuit drives the deflection of the liquid crystal in the blind hole area of the display screen through the change of the electric field, the light path of the light passing through the blind hole area is changed, and the focusing of the camera is realized. Therefore, the focusing in the related technology can be solved. The solution is an independent camera system, which is large in size and is not conducive to the problem of ID modeling design, and achieves the effect of realizing the focus function without increasing the size of the module.

Description of the drawings

Fig. 1 is a structural block diagram of a camera device under a display screen according to an embodiment of the present invention;

2 is a structural block diagram of a camera device under a display screen equipped with a display module according to an embodiment of the present invention;

3 is a structural block diagram of a camera device under a display screen equipped with a sealing ring according to an embodiment of the present invention;

4 is a schematic diagram of a mobile terminal provided with an under-screen camera device according to an optional embodiment of the present invention;

Fig. 5 is a schematic diagram of a layered structure of an under-screen camera device according to an optional embodiment of the present invention;

6 is a schematic diagram of a cross-sectional structure of an under-screen camera device according to an alternative embodiment of the present invention;

Fig. 7 is a schematic structural diagram of a single camera assembly according to an alternative embodiment of the present invention.

detailed description

Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

It should be noted that the terms “first” and “second” in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and not necessarily used to describe a specific sequence or sequence.

In this embodiment, a camera device under the display screen is provided. Although the devices described in the following embodiments are preferably implemented by hardware, it is also possible to implement a combination of software and hardware.

FIG. 1 is a structural block diagram of a camera device under a display screen according to an embodiment of the present invention. As shown in FIG. 1, the device includes a display screen 103 and a camera 101. The display screen 103 also includes an electric field circuit.

The display screen 103 is provided with a blind hole area.

The camera 101 is arranged below the blind hole area.

The electric field circuit drives the deflection of the liquid crystal in the blind hole area of the display screen 103 through the change of the electric field, so as to change the optical path of the light passing through the blind hole area, and realize the focusing of the camera.

2 is a structural block diagram of an under-display camera device equipped with a display module according to an embodiment of the present invention. As shown in FIG. 2, the device may include a driving circuit 303 in addition to all the modules shown in FIG. 1. The display screen 103 may further include a cover 201 located at the top and a display module 203 located under the cover.

The display module 203 includes a liquid crystal layer 202 and a backlight layer. The backlight layer is provided with openings, the liquid crystal layer above the openings forms the blind hole area, and the electric field circuit is arranged on the liquid crystal The outermost layer of the ITO glass layer

The driving circuit 303 is arranged inside the camera 101 or arranged on the display module 203, and is electrically connected to the electric field circuit for adjusting the voltage of the electric field circuit to generate electric field changes.

In this embodiment, the driving circuit 303 is electrically connected to the circuit board of the camera 101.

In this embodiment, the deflection of the liquid crystal in the blind hole region of the liquid crystal layer 202 can change the refractive index distribution of the liquid crystal layer.

In this embodiment, the center of the blind hole area of the liquid crystal layer 202 is aligned with the center of the aperture of the backlight layer and the center of the lens of the camera 101, and the blind hole area of the liquid crystal layer 202 is larger than the aperture of the backlight layer. hole.

In this embodiment, the lens of the camera 101 is located in the opening of the backlight layer.

FIG. 3 is a structural block diagram of an under-display camera device equipped with a sealing ring according to an embodiment of the present invention. As shown in FIG. 3, the device may include a sealing ring 102 in addition to all the modules shown in FIG. 1.

The sealing ring 102 is arranged between the camera 101 and the display screen 103.

In this embodiment, the camera 101 may be a fixed focus camera.

In this embodiment, the electric field generated by the electric field circuit covers the field of view of the camera 101.

It should be noted that each of the above-mentioned modules can be implemented by software or hardware. For the latter, it can be implemented in the following way, but not limited to this: the above-mentioned modules are all located in the same processor; or, the above-mentioned modules are in any combination The forms are located in different processors.

In order to facilitate the understanding of the technical solutions provided by the present invention, detailed descriptions will be given below in conjunction with embodiments of specific scenarios.

The optional embodiment of the present invention can be applied to a Selfie system of a mobile terminal. The traditional focusing solution is a camera independent system, which is large in size, not conducive to ID modeling design, and does not conform to the overall screen modeling trend. The design of the invention satisfies the mainstream full-screen modeling trend while improving the self-portrait effect.

The focusing scheme in the related technology is an independent focusing structure of the camera, which is large in size, which is not conducive to the design of ID modeling, and does not conform to the trend of full-screen modeling. The optional embodiment of the present invention realizes the focusing function without increasing the size of the module.

The key technology of the optional embodiment of the present invention is to realize the auto-focusing function through the combination of the camera and the screen assembly, eliminating the need for independent focusing motor components, and having the advantages of small space occupation, no magnetic interference, and the like.

Fig. 4 is a schematic diagram of a mobile terminal provided with an under-screen camera device according to an alternative embodiment of the present invention. As shown in Fig. 4, an alternative embodiment of the present invention designs the design and layout of a screen and a camera module. Applying the technical solutions described in the optional embodiments of the present invention can effectively improve the visual effect of the display screen while realizing the auto-focus function of the camera, thereby improving the user's photographing experience.

The camera of the optional embodiment of the present invention is located below the screen, and the screen above the camera adopts a blind hole design, the liquid crystal layer and glass are reserved in the blind hole, and the driving circuit of the liquid crystal opening blind hole area is designed to independently control the liquid crystal inversion arrangement. The camera adopts a fixed focus design and is installed directly under the opening, forming a brand new focusing system with the liquid crystal layer at the opening. The liquid crystal layer at the opening is driven by a circuit, the flip angle of the liquid crystal particles is controlled, and the refractive index distribution of the liquid crystal layer is adjusted to achieve a focusing effect. Since there are no moving components on the camera module, there is no need to design additional avoidance space, and the screen opening is smaller than the traditional VCM focusing solution.

The optional embodiments of the present invention are applicable to the design, development, and manufacturing of various terminal products with camera functions.

FIG. 5 is a schematic diagram of the structural stacking of an under-screen camera device according to an alternative embodiment of the present invention. As shown in FIG. A blind hole is opened on 103, and the lens of the camera module 101 is aligned with the blind hole. In addition, a sealing ring 102 is provided between the lens of the camera module 101 and the blind hole, and a protective glass and a touch assembly 104 are provided on the display screen assembly 103.

Fig. 6 is a schematic cross-sectional view of an under-screen camera device according to an alternative embodiment of the present invention. As shown in Fig. 6, the uppermost layer is a cover plate 201 for protecting the display screen. The module 204 includes an ITO glass 202, a liquid crystal layer 202, and a backlight 205 in order from top to bottom. A blind hole is opened on the backlight 205, the camera 204 is located directly below the blind hole, the lens of the camera 206 extends into the blind hole, and the camera 206 forms a shooting angle of view through the blind hole.

FIG. 7 is a schematic structural diagram of a single camera assembly according to an optional embodiment of the present invention, as shown in FIG. 7, including: a lens 301, a base 302, a driving circuit 303, a sensor 304, and a circuit board 305.

As shown in Figure 5, Figure 6, and Figure 7:

In this embodiment, the lens 301 may be a plastic lens or a glass lens or a glass-plastic hybrid structure, and the number of lenses may be 2 or more.

The camera 206 passes through the opening of the backlight 206, is aligned with the display module 204 up, down, left and right, and maintains a specified relative position.

An independent circuit is designed on the ITO glass 202 of the display module 204 directly above the camera 206 to control electric field changes. The independent circuit is directly or indirectly connected to the circuit board 305 of the camera module 206 through the FPC of the display module 204, and the independent circuit is controlled by the driving chip 303. The driving chip 303 can be designed inside the camera or externally or on the display module 204. This independently controllable electric field covers the field of view of the camera 206; the driving chip 303 adjusts different voltage changes under different focusing distances. The electric field drives the deflection of the liquid crystal to change the light path of the light passing through the liquid crystal module directly above the camera to realize the focusing function.

The above camera system realizes the focusing function without the need of a voice coil motor, and has the advantages of fast focusing speed, low power consumption and no motor magnetic interference. And the opening size of the display module can be reduced.

Obviously, those skilled in the art should understand that the above-mentioned modules or steps of the present invention can be implemented by a general computing device, and they can be concentrated on a single computing device or distributed in a network composed of multiple computing devices. Above, they can be implemented with program codes executable by a computing device, so that they can be stored in a storage device for execution by the computing device, and in some cases, they can be executed in a different order than shown here. Or the described steps, or fabricate them into individual integrated circuit modules respectively, or fabricate multiple modules or steps of them into a single integrated circuit module to achieve. In this way, the present invention is not limited to any specific combination of hardware and software.

The above descriptions are only preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, the present invention can have various modifications and changes. Any modification, equivalent replacement, improvement, etc., made within the principles of the present invention shall be included in the protection scope of the present invention.

Claims

A camera device under a display screen, comprising: a display screen and a camera, the display screen is provided with a blind hole area, the camera is arranged below the blind hole area, wherein the display screen further includes an electric field circuit, The electric field circuit drives the deflection of the liquid crystal in the blind hole area of the display screen through the change of the electric field, so as to change the optical path of the light passing through the blind hole area to realize the focusing of the camera.
The device according to claim 1, wherein the display screen comprises a cover plate located at the top and a display module located under the cover plate, wherein:

The display module includes a liquid crystal layer and a backlight layer, the backlight layer is provided with an opening, the liquid crystal layer above the opening forms the blind hole area, and the electric field circuit is arranged on the liquid crystal layer On the outermost I TO glass layer.
The device according to claim 2, further comprising:

The driving circuit is arranged inside the camera or arranged on the display module, and is electrically connected to the electric field circuit, and is used to adjust the voltage of the electric field circuit to generate electric field changes.
3. The device according to claim 3, wherein the deflection of the liquid crystal in the blind hole region in the liquid crystal layer changes the refractive index distribution of the liquid crystal layer.
The device according to claim 1, wherein the camera is a fixed focus camera.
The device according to claim 2, wherein the lens of the camera is located in the opening of the backlight layer.
The device according to claim 1, wherein the electric field generated by the electric field circuit covers the field of view of the camera.
The device according to claim 2, wherein the center of the blind hole area of the liquid crystal layer is aligned with the center of the opening of the backlight layer and the center of the camera lens, and the blind hole area of the liquid crystal layer is larger than that of the backlight layer Of the opening.
The device according to claim 1, further comprising:

The sealing ring is arranged between the camera and the display screen.
3. The device of claim 3, wherein the driving circuit is electrically connected to a circuit board of the camera.