CN111866312A - Under-screen camera shooting assembly, corresponding organic light emitting diode display screen and terminal equipment - Google Patents

Abstract

The application provides an under-screen camera assembly, which comprises an organic light emitting diode display screen, a first lens and a second lens, wherein the organic light emitting diode display screen is provided with a first through hole; and the camera module is arranged at the rear end of the first through hole, the camera module comprises an extending part extending into the first through hole and a main body part positioned at the rear end of the extending part, the extending part comprises at least one first optical element, the main body part comprises a plurality of second optical elements which are assembled together, and the outer side surface of the extending part retracts relative to the outer side surface of the main body part towards the optical axis by making the first optical element different from the manufacturing material of the second optical elements and/or making the first optical element adopt a supporting structure or a supporting mode different from the second optical elements. The application also provides corresponding terminal equipment. This application can be when guaranteeing to make a video recording module light inlet quantity under the screen, and the size in the hole of "screen of punching" is dwindled in the help.

Description

Under-screen camera shooting assembly, corresponding organic light emitting diode display screen and terminal equipment

Technical Field

The present application relates to optical imaging technology and display technology, and in particular, to an off-screen camera module, and a corresponding organic light emitting diode display screen and terminal device.

Background

In order to meet the camera shooting requirements of customers, electronic terminals including mobile phones generally have a camera shooting function. Therefore, the existing mobile phone terminal generally has a front-back camera module, and the front camera module is usually arranged on the same side of the display screen and used for meeting the self-photographing functions of a user. However, as the screen occupation ratio becomes larger, higher and higher requirements are also placed on the arrangement of the front camera.

In order to reduce the influence of the camera on the screen occupation ratio and realize the full-screen, different manufacturers develop various solutions from different angles. One technical direction is: arrange leading camera module at the cell-phone top frame, form the bang screen or the water droplet screen that are close to the full screen. The other technical direction is as follows: adopt telescopic camera module group so that hide and use the camera. When shooting is needed, the camera can be controlled to extend out of the shell of the mobile phone (or other electronic equipment) for shooting; after shooting, the camera retracts into the shell of the mobile phone (or other electronic equipment). However, when the camera is continuously extended or retracted and extends relative to the mobile phone (or other electronic devices), the camera is easily damaged by external impact, and is difficult to replace.

In the last months, some manufacturers have introduced an under-screen camera scheme commonly known as a "hole-punching screen" or a "hole-digging screen". The technology comprises the following steps: and drilling a through hole or a blind hole on the display screen, and placing the front camera module at the through hole or behind the blind hole. The technology can save a motor for driving the camera to stretch and retract, and is favorable for improving the reliability of products. However, in the prior art, the "punched" or "dug" portion of the display screen has a large area (e.g., the diameter of a circular dug is typically larger than 4mm), and such a dug may adversely affect the user experience.

In the field of display technology, an Organic Light Emitting Diode display (i.e., an OLED screen, wherein an OLED is an abbreviation of Organic Light-Emitting Diode, and an Organic Light Emitting Diode display is also sometimes called an Organic electroluminescent display) can emit Light without a backlight, and the OLED screen is transparent to some extent. However, unlike glass, resin, etc. lens materials, the OLED screen has complex microstructures inside, which include a large number of light emitting structures fabricated on a substrate based on, for example, a semiconductor process, and corresponding microcircuit structures for controlling the light emitting structures. The complex microstructure inside the screen causes the light transmittance of the OLED screen to be far smaller than that of lens materials such as glass and resin. If set up leading the camera module in the rear end of current OLED screen, the OLED screen (though it has certain light transmissivity) still can form the shelter from leading the camera module, can't form images.

In the current "screen that punches" technique, the scheme of punching of OLED screen is usually to beat the through-hole, beats the through-hole and can avoid sheltering from of OLED screen to lead to the screen to make a video recording the quantity of light of module not enough under the screen. On the other hand, a scheme of punching a backlight panel of an LCD screen, that is, a blind-hole screen scheme, also exists in the prior art. In this scheme, only the backlight panel of the LCD screen may be perforated. However, the thickness of the LCD screen itself is typically significantly larger than the OLED screen, which makes it difficult to make a terminal device (e.g., a mobile phone) carrying the under-screen camera module thin. Therefore, one may expect more an under-screen camera module solution based on an OLED screen. In order to further reduce the thickness of a terminal device (e.g., a mobile phone), it is also desirable to insert a part of the front camera module into a through hole of the OLED screen. However, due to the limitation of the optical principle of the imaging optical path, in order to meet the high requirement of people on imaging quality, the radial dimension (radial direction is perpendicular to the optical axis) of the front camera module is difficult to be reduced unlimitedly, which results in a larger aperture of the through hole of the OLED screen. The large aperture of the through hole causes the picture displayed on the screen to have obvious hole digging and poor visual experience.

In view of the above, there is a strong need in the market for an off-screen camera solution that can reduce the thickness of the terminal device and can reduce the punching size.

Disclosure of Invention

The present invention aims to provide a solution that overcomes at least one of the drawbacks of the prior art.

According to one aspect of the invention, an under-screen camera assembly is provided, which comprises an organic light emitting diode display screen and a camera module. The organic light emitting diode display screen is provided with a first through hole. The optical axis of the camera module is perpendicular to the surface of the organic light emitting diode display screen, and the camera module is arranged at the rear end of the first through hole, wherein the camera module comprises an extending part extending into the first through hole and a main body part positioned at the rear end of the extending part, the extending part comprises at least one first optical element, the main body part comprises a plurality of second optical elements which are assembled together, and the outer side surface of the extending part retracts towards the optical axis relative to the outer side surface of the main body part by enabling the first optical element to be different from manufacturing materials of the second optical elements and/or enabling the first optical element to adopt a supporting structure or a supporting mode which is different from the second optical elements.

Wherein the at least one first optical element is a single first lens and the plurality of second optical elements includes a plurality of second lenses.

Wherein the at least one first optical element is a single color filter.

Wherein the at least one first optical element is a color filter and a first lens, and the plurality of second optical elements includes a plurality of second lenses.

The first lens is a glass lens, and the second lens is a plastic lens.

The first lens and the second lens are arranged in the same lens barrel which is integrally formed; the lens barrel comprises a first section accommodated in the first through hole and a second section positioned outside the first through hole, wherein the outer side surface of the first lens is abutted against the inner side surface of the first section; the outer side of the first segment is indented towards the optical axis relative to the outer side of the second segment.

Wherein a thickness of the first section is less than a thickness of the second section.

Wherein the inner side surface of the lens barrel has a plurality of steps, and the first lens and the second lens are assembled together by sequentially embedding the first lens and the second lens into the plurality of steps.

The extending part is provided with a first lens barrel, and the first lens is arranged in the first lens barrel; the main body part is provided with a second lens barrel, and the plurality of second lenses are arranged in the second lens barrel.

Wherein the first lens and the plurality of second lenses are assembled together by bonding a top surface of the second barrel and a bottom surface of the first barrel and/or the structural region of the first lens.

The stretching part and the main body part are bonded after active calibration, and the active calibration is a process of optimizing and adjusting the relative position of the stretching part and the main body part based on an actual imaging result.

The extending part and the central axis of the main body part form an included angle which is not zero.

The outer side surface of the first lens is free of lens barrel support.

Wherein the plurality of second lenses are assembled through the support of the lens barrel; the first lens comprises a first optical area used for imaging and a first structure area surrounding the first optical area, and the bottom surface of the first structure area is bonded to the top surface of the lens barrel.

The top surface of the lens cone is supported against the bottom surface of the organic light emitting diode display screen.

The organic light emitting diode display screen is provided with a cover plate, and the cover plate, the side wall of the first through hole, the top surface of the lens barrel, the top surface of the first lens and the glue material for bonding jointly form a closed cavity.

The stretching part and the main body part are bonded after active calibration, and the active calibration is a process of optimizing and adjusting the relative position of the stretching part and the main body part based on an actual imaging result.

The extending part and the central axis of the main body part form an included angle which is not zero.

The plurality of second optical elements are assembled through the support of the lens barrel, and the bottom surface of the color filter is bonded to the top surface of the lens barrel.

The plurality of second optical elements are supported by the lens barrel to be assembled, the organic light emitting diode display screen is provided with a cover plate, and the top surface of the color filter is bonded to the bottom surface of the cover plate through optical cement.

The top surface of the lens cone is supported against the bottom surface of the organic light emitting diode display screen.

The organic light emitting diode display screen is provided with a cover plate, and the cover plate, the side wall of the first through hole, the top surface of the lens barrel, the end surface (the end surface is the top surface or the bottom surface) of the color filter and a glue material for adhesion form a closed cavity together.

Wherein the first via sidewall has a light absorbing layer.

And the top of the lens barrel is used as a diaphragm of the camera module.

And the top of the lens barrel is used as a diaphragm of the camera module.

And the top of the first lens barrel is used as a diaphragm of the camera module.

The organic light emitting diode display screen is provided with a substrate, the substrate is provided with a positioning mark, and the positioning mark is used for aligning the camera module to the through hole in the assembling process.

According to another aspect of the present application, there is also provided a terminal device, which includes any one of the above-mentioned under-screen camera assemblies.

The camera module is used as a front camera module of the terminal equipment, and the organic light emitting diode display screen is used as a display panel on the front side of the terminal equipment.

Compared with the prior art, the application has at least one of the following technical effects:

1. this application can be when guaranteeing to make a video recording module light inlet quantity under the screen, the size in the hole of "the screen that punches" is dwindled in the help to promote user experience. The dimensions of the holes are understood here to be: when the display device is bright, the size of the hole in the OLED display screen can be observed from the front side by a user.

2. In some embodiments of the present application, the radial dimension of the first lens is reduced by replacing the material of the first lens located at the frontmost end with glass (or other materials with a larger refractive index and suitable for being molded into a lens), so that the top of the camera module can extend into the through hole with a smaller aperture on the premise that the optical design is unchanged or basically unchanged, and the visual experience of "punching a screen" is improved and the thickness of the terminal device is reduced.

3. In some embodiments of this application, reduce the radial dimension at module top of making a video recording through the lens cone lateral wall attenuate that will correspond to the first lens of foremost to under the unchangeable or unchangeable prerequisite of optical design, make the top of making a video recording the module and can stretch into the through-hole that the aperture is littleer, and then improve the visual experience of "punching the screen" and reduce terminal equipment's thickness. Note that, for a typical camera module for consumer electronic devices, the first lens located at the forefront among all the lenses generally has a small radial size and a light weight, so it is a condition that the side wall of the lens barrel corresponding to the first lens is thinned. Because the first lens is light in weight, the first lens can be effectively supported after the corresponding side wall of the lens barrel is thinned.

4. In some embodiments of the present application, the lens barrel is designed in a split manner, the first lens is mounted on a single first lens barrel, and the remaining lenses (which may be referred to as second lenses) can be assembled together through the second lens barrel. Under this kind of design, because first lens cone need not be through the support effect of self a plurality of lenses of assemblage, consequently its lateral wall thickness can reduce to under the unchangeable or unchangeable prerequisite of optical design, make the top of making a video recording the module can stretch into the through-hole that the aperture is littleer, and then improve the visual experience of "punching the screen" and reduce terminal equipment's thickness.

5. In some embodiments of the application, the first lens adopts a non-lens barrel design, and the design can enable the top of the camera module to extend into the through hole with a smaller aperture on the premise that the optical design is unchanged or basically unchanged due to the fact that the lens barrel on the periphery of the first lens is omitted, so that the visual experience of 'screen punching' is improved, and the thickness of the terminal device is reduced.

6. In some embodiments of the present application, the color filter may be disposed in the through hole of the OLED display screen by being disposed in front of the color filter. This kind of design can be under the unchangeable or unchangeable prerequisite basically of optical design, and the top that makes the module of making a video recording can stretch into the through-hole that the aperture is littleer, and then improves the visual experience of "screen punching" and reduces terminal equipment's thickness.

7. In some embodiments of the present application, stray light caused by refraction and reflection can also be suppressed by providing a light absorbing layer on the sidewall of the through hole.

8. In some embodiments of the present application, the top surface of the lens barrel can be supported against the bottom surface of the OLED display screen, and then the cover plate at the top of the OLED display screen is combined, so that the through hole can be configured into a closed cavity to prevent the lens (i.e., the optical system) of the camera module from getting dirty. This design, in which the through-hole is configured as a closed cavity, is particularly suitable in the case of a non-barrel design of the first lens and in the case of a color filter in front.

9. In some embodiments of the present application, a light absorbing layer may be provided on the sidewall of the through hole, which is particularly suitable for the case where the first lens is of a non-lens design and the case where the color filter is placed in front.

10. In some embodiments of this application, through regarding the top with the lens cone as the diaphragm, can make the surface (the front) that advances the light plane and be close OLED display screen more of the module of making a video recording to reduce the transmission distance of external light transmission to the module of making a video recording, and then further improve the light inlet amount of the module of making a video recording under the screen. In other words, this design may allow the OLED display to have a smaller via aperture for the same amount of incoming light requirements.

11. In some embodiments of the present application, the lens barrel is of a split design, and the top of the lens barrel of the first lens is used as a diaphragm. This design may allow the OLED display to have a smaller via aperture.

12. The utility model provides a subassembly of making a video recording under screen is particularly suitable for being used for the smart mobile phone, and the module of making a video recording in the subassembly of making a video recording under this screen is particularly suitable for the leading module of making a video recording as the smart mobile phone.

Drawings

Exemplary embodiments are illustrated in referenced figures of the drawings. The embodiments and figures disclosed herein are to be regarded as illustrative rather than restrictive.

FIG. 1 illustrates a cross-sectional schematic view of an underscreen camera assembly of one embodiment of the present application;

FIG. 2 shows a schematic top view of the OLED display of FIG. 1;

FIG. 3 illustrates a cross-sectional view of an exemplary OLED display 100;

FIG. 4 illustrates a cross-sectional view of an under-screen camera assembly in one embodiment of the present application;

FIG. 5 is a schematic cross-sectional view of an under-screen camera assembly according to an embodiment of the present application;

FIG. 6 shows a schematic cross-sectional view of an under-screen camera assembly of an embodiment of the present application based on a color filter front-facing design;

FIG. 7 shows a schematic cross-sectional view of an under-screen camera assembly of another embodiment of the present application based on a color filter front-facing design;

FIG. 8 shows a schematic cross-sectional view of an under-screen camera assembly of yet another embodiment of the present application based on a color filter front-facing design;

FIG. 9 is a schematic cross-sectional view of an organic light emitting diode display panel in an embodiment of the present application;

FIG. 10 shows a detail of the display layer, buffer layer and other peripheral functional layers of FIG. 3;

FIG. 11 shows a schematic view of a substrate with an OLED screen having alignment marks;

fig. 12 shows a schematic top view of a non-uniformly smaller barrel first segment thickness;

fig. 13 shows a schematic cross-sectional view of an off-screen camera assembly of another embodiment of the present application based on a split barrel;

fig. 14 shows a schematic cross-sectional view of an underscreen camera assembly of yet another embodiment of a split barrel based on the present application;

fig. 15 shows a schematic cross-sectional view of an under-screen camera assembly of yet another embodiment of the present application based on a split barrel;

fig. 16 shows a schematic view of the common coverage of the first via sidewall by the layer of encapsulant material and the layer of ink;

fig. 17 shows a first lens in an embodiment of the present application.

Detailed Description

For a better understanding of the present application, various aspects of the present application will be described in more detail with reference to the accompanying drawings. It should be understood that the detailed description is merely illustrative of exemplary embodiments of the present application and does not limit the scope of the present application in any way. Like reference numerals refer to like elements throughout the specification. The expression "and/or" includes any and all combinations of one or more of the associated listed items.

It should be noted that the expressions first, second, etc. in this specification are used only to distinguish one feature from another feature, and do not indicate any limitation on the features. Thus, a first body discussed below may also be referred to as a second body without departing from the teachings of the present application.

In the drawings, the thickness, size, and shape of an object have been slightly exaggerated for convenience of explanation. The figures are purely diagrammatic and not drawn to scale.

It will be further understood that the terms "comprises," "comprising," "includes," "including," "has," "including," and/or "including," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Moreover, when a statement such as "at least one of" appears after a list of listed features, the entirety of the listed features is modified rather than modifying individual elements in the list. Furthermore, when describing embodiments of the present application, the use of "may" mean "one or more embodiments of the present application. Also, the term "exemplary" is intended to refer to an example or illustration.

As used herein, the terms "substantially," "about," and the like are used as terms of table approximation and not as terms of table degree, and are intended to account for inherent deviations in measured or calculated values that will be recognized by those of ordinary skill in the art.

Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

FIG. 1 shows a schematic cross-sectional view of an underscreen camera assembly of an embodiment of the present application. Referring to fig. 1, the under-screen camera module includes an organic light emitting diode display screen 100 (i.e., an OLED screen) and a camera module 200 located at a rear end of the organic light emitting diode display screen 100. The optical axis ax of the camera module 200 is substantially perpendicular to the surface 101 of the oled display 100. Here, the "rear end" refers to an end of the imaging optical path of the camera module 200 close to the image side. The camera module 200 is located at the rear end of the under-screen camera area 120 of the oled display 100. The off-screen camera area 120 is an area of the oled display 100 adapted to the camera module 200. Further, fig. 2 shows a schematic top view of the organic light emitting diode display panel of fig. 1. Referring to fig. 2, the display area of the organic light emitting diode display screen includes an off-screen image pickup area 120 and a non-off-screen image pickup area 110. The under-screen camera area 120 may be circular and may be sized to fit the size of the camera module 200. The off-screen capture area 120 may be surrounded by the non-off-screen capture area 110.

In the present application, the oled display 100 employs a through hole design, i.e., the under-panel imaging region 120 is formed by using a through hole (where a cover plate may not be penetrated, which will be further described below) penetrating the oled display. For the sake of understanding, the structure of the organic light emitting diode display panel will be briefly described below.

Fig. 3 shows a schematic cross-sectional view of a typical organic light emitting diode display panel 100. Referring to fig. 3, the organic light emitting diode display panel 100 includes: the display device comprises a substrate 131, a buffer layer 132, a display layer 133 positioned above the buffer layer 132, an encapsulation layer 134 covering the display layer 133, a polarizing layer 135 positioned above the encapsulation layer 134, and a cover plate 136 covering the polarizing layer 135.

Further, fig. 4 shows a schematic cross-sectional view of an under-screen camera assembly in an embodiment of the present application. Referring to fig. 4, in the present embodiment, the under-screen camera module includes an oled display 100 and a camera module 200. The oled display 100 has a first through hole 140, and the first through hole 140 forms the under-screen image capture region. The optical axis of the camera module 200 is perpendicular to the surface of the oled display 100, and the camera module 200 is disposed at the rear end of the first through hole 140. The camera module 200 includes an extending portion 210 extending into the first through hole 140, and a main body portion 220 located at a rear end of the extending portion 210 (wherein the main body portion 220 is located outside the first through hole 140). The protruding portion 210 includes at least one first optical element 211, and the main body portion 220 includes a plurality of second optical elements 221 assembled together. Referring to fig. 4, in the present embodiment, the at least one first optical element 211 is a single first lens, and the plurality of second optical elements 221 includes a plurality of second lenses. The first lens is a glass lens, and the second lens is a plastic lens. The glass lens can be molded in a smaller size than the plastic lens, thus helping to allow the top of the camera module (the protruding portion 210) to protrude into the first through hole 140 with a smaller diameter. In this embodiment, the radial dimension of the first lens is reduced by replacing the material of the first lens located at the foremost end with glass (or other materials with a larger refractive index and suitable for being molded into a lens), so that the top of the camera module can extend into the through hole with a smaller aperture on the premise that the optical design is unchanged or basically unchanged, and the visual experience of the 'perforated screen' is improved and the thickness of the terminal device is reduced.

Further, still referring to fig. 4, in another embodiment of the present application, the first lens and the second lens are mounted in the same barrel 230 that is integrally formed. The barrel 230 includes a first section 231 received in the first through hole 140 and a second section 232 located outside the first through hole 140, wherein the outer side of the first lens is seated against the inner side of the first section 231. Relative to the outer side surface of the second section, the outer side surface of the first section retracts towards the optical axis of the camera module. The inner side of the lens barrel may have a plurality of steps, and the first lens and the second lens are assembled together by sequentially fitting the first lens and the second lens into the plurality of steps (note that, for simplifying the drawing, the plurality of steps are not shown in fig. 4). In this embodiment, the camera module 200 may be divided into an extending portion 210 and a main body portion 220. The first segment 231 and the first optical element 211 (e.g., the first lens) mounted on the first segment 231 may constitute an insertion portion 210 of the camera module 200, and the insertion portion 210 is inserted into the first through hole 140. The main body 220 is located outside the first through hole 140. The main body part 220 may include a second section 232 and a plurality of second optical elements 221 (e.g., second lenses) mounted on the second section 232, and may further include a photosensitive assembly (note that the photosensitive assembly is not shown in fig. 4, and may include a photosensitive chip, a circuit board, a color filter, and the like). In this embodiment, reduce the radial dimension at module top of making a video recording through the lens cone lateral wall attenuate that will correspond to the first lens of foremost to under the unchangeable or unchangeable prerequisite of optical design, make the top of making a video recording the module and can stretch into the through-hole that the aperture is littleer, and then improve the visual experience of "screen punching" and reduce terminal equipment's thickness. Note that for a typical camera module for a consumer electronic device (especially a smartphone), the first lens located at the forefront among all the lenses generally has a small radial size and a light weight, so it is a condition that the side wall of the lens barrel corresponding to the first lens is thinned. Because the first lens is light in weight, the first lens can be effectively supported after the corresponding side wall of the lens barrel is thinned. In a specific implementation, the thinning of the side wall can be uniform thinning, that is, the thickness of the lens barrel is uniformly reduced, and also the thickness of a partial area of the lens barrel is reduced. For example, fig. 12 shows a schematic top view of a non-uniformly smaller barrel first segment thickness. Referring to fig. 12, a circular lens barrel may be fabricated, and then at the first segment, the lens barrel material of the white portion around the drawing (i.e., the removed portion 231a) is removed based on a removing process (e.g., cutting), so as to obtain an outer contour of the thinned first segment 231 of the lens barrel. Accordingly, the shape of the first through hole of the display screen can be matched with the shape of the thinned first section of the lens barrel. Of course, the lens barrel with the first section "thinned" can also be directly formed during the lens barrel molding process, for example, during the lens barrel injection molding process, the lens barrel with the first section "thinned" is directly formed through the design of the mold.

Further, still referring to fig. 4, in one embodiment of the present application, the thickness of the first section is less than the thickness of the second section. The thickness here refers to the radial dimension, i.e. the dimension in a direction perpendicular to the optical axis of the camera module.

In order to simplify the drawing, the photosensitive component part of the camera module is not shown in fig. 4, that is, common components assembled into the photosensitive component, such as a circuit board, a photosensitive chip, a color filter, a lens holder, etc., are not shown in fig. 4, and these components may be components of the camera module in this application.

Further, fig. 5 shows a schematic cross-sectional view of an under-screen image pickup assembly according to an embodiment of the present application. Referring to fig. 5, in the present embodiment, the under-screen camera module includes an oled display 100 and a camera module 200. The oled display 100 has a first through hole 140, and the first through hole 140 forms an under-panel camera area. The optical axis of the camera module 200 is perpendicular to the surface of the oled display 100, and the camera module 200 is disposed at the rear end of the first through hole 140. The camera module 200 includes an extending portion 210 extending into the first through hole 140 and a main body portion 220 located at a rear end of the extending portion 210, the extending portion 210 includes at least one first optical element 211, and the main body portion 220 includes a plurality of second optical elements 221 assembled together. Referring to fig. 5, in the present embodiment, the at least one first optical element 211 is a single first lens, and the plurality of second optical elements 221 includes a plurality of second lenses. In this embodiment, a split lens barrel structure is adopted. Specifically, the insertion portion 210 has a first barrel 241, and the first lens is mounted in the first barrel 241; the main body part 220 has a second barrel 242, and the plurality of second lenses are mounted in the second barrel 242. In this embodiment, the first lens and the plurality of second lenses are assembled by bonding the top surface of the second barrel 242 and the bottom surface of the first barrel 241 and/or the structural region of the first lens. The protruding portion 210 and the main body portion 220 may be bonded after active calibration, which is a process of optimally adjusting the relative positions of the protruding portion and the main body portion based on an actual imaging result. As a result of the active alignment, the protrusion may have an angle with the central axis of the main body portion that is different from zero. Because the number of the lenses is large, the lens barrel needs to reach a certain size to maintain the strength so as to assemble a plurality of lenses into a stable and reliable lens group. For the split lens barrel (split lens), the first lens barrel only needs to bear one or a small number of lenses, so that the lens can be formed into a small-head lens. The diaphragm can be arranged on the top of the first lens barrel or on the top of the second lens barrel, and a lens barrel (the lens barrel is usually black to achieve a light absorption effect, and therefore can also be called as a black object) or a space ring can be used as the diaphragm. In summary, in the design of this embodiment, because the first lens barrel does not need to assemble a plurality of lenses through its own supporting function, the thickness of the side wall thereof can be reduced, so that the top of the camera module can extend into the through hole with a smaller aperture on the premise that the optical design is unchanged or basically unchanged, thereby improving the visual experience of the "perforated screen" and reducing the thickness of the terminal device.

In the embodiment shown in fig. 5, the first lens barrel 241 and the second lens barrel 242 may be assembled first, and then assembled into a complete camera module (including a photosensitive component), and finally assembled with the display screen to form a complete under-screen camera component; or first lens barrel 241 and second lens barrel 242 may be assembled to obtain a complete optical lens, then the optical lens is assembled with the display screen, and finally the photosensitive component is assembled to the rear end of the optical lens, so as to form a complete under-screen camera component.

Further, fig. 13 shows a schematic cross-sectional view of an under-screen image pickup assembly of another embodiment of the present application based on a split-type lens barrel. Referring to fig. 13, in this embodiment, for the sub-screen camera module based on the split-type lens barrel, the protruding portion 210 of the camera module 200 may be firstly assembled with the display screen 100. At this time, the top of the protruding portion 210 may be attached to the bottom of the cover plate 136 of the display panel 100, and the outer side surface of the protruding portion 210 is not attached to the inner wall 141 of the first through hole 140 of the display panel 100. Specifically, the top surface of the protruding portion 210 and the bottom surface of the cover plate 136 of the display screen 100 may be bonded by a glue material.

Further, fig. 14 shows a schematic cross-sectional view of an under-screen image pickup assembly of a further embodiment of the present application based on a split-type lens barrel. Referring to fig. 14, in the present embodiment, the protruding portion 210 may be attached to the sidewall 141 (inner wall) of the first through hole 140 through the outer side surface 211 thereof, while the top surface thereof is not attached to (or does not contact) the bottom surface of the display cover plate. In a specific implementation, the protruding portion 210 may be first placed in the first through hole 140, and the outer side surface 211 of the protruding portion is glued to the sidewall 141 (inner wall) of the first through hole 140 of the display screen 100, and then the bottom surface of the protruding portion 210 is glued to the top surface of the main body portion 220 to form a complete camera module (or a camera module under the screen). The bonding between the bottom surface of the protruding portion 210 and the top surface of the main body portion 220 may be accomplished based on the active calibration technique, that is, after the relative positions of the protruding portion and the main body portion are optimally adjusted based on the actual imaging result, the bottom surface of the protruding portion 210 and the top surface of the main body portion 220 are bonded.

Further, fig. 15 shows a schematic cross-sectional view of an under-screen image pickup assembly of still another embodiment of the present application based on a split-type lens barrel. Referring to fig. 15, in the present embodiment, the top surface of the protruding portion 210 is attached to the bottom surface of the cover plate 136 of the display panel 100, and the side wall (outer side surface) thereof is attached to the inner wall 141 of the first through hole 140. In other words, the protruding part 210 may be glued to both the cover plate 136 of the display screen and the inner wall 141 of the first through hole 140 through the top surface and the side surface. In a specific implementation, the extending portion 210 may be bonded to the display screen 100, and then the extending portion 210 is bonded to the main body portion 220 to form a complete camera module (or a camera module under the screen). The bonding between the bottom surface of the protruding portion 210 and the top surface of the main body portion 220 may be accomplished based on the active calibration technique, that is, after the relative position of the protruding portion and the main body portion is optimally adjusted based on the actual imaging result, the bottom surface of the protruding portion and the top surface of the main body portion are bonded. Further, in the present embodiment, the color filter 290 may be mounted between the first barrel 241 of the protruding portion 210 and the second barrel 242 of the main body portion 220. Since the color filter 290 is front-facing, it helps to reduce the back focus of the camera module 200, thereby helping to reduce the thickness of the terminal device (e.g., smartphone). In the above embodiment, the photosensitive element may be bonded to the second barrel 242 of the main body 220 and then bonded to the extending portion 241; the photosensitive component may also be bonded to the second barrel 242 after the second barrel 242 of the main body 220 is bonded to the first barrel 241 of the extending portion 210.

Further, in another embodiment of the present application, there is also provided a modified embodiment based on the embodiment of fig. 5. In this modified embodiment, the outer side surface of the first lens is free of barrel support (i.e., the first barrel in fig. 5 is eliminated). The plurality of second lenses are still assembled through the support of the lens barrel. The first lens comprises a first optical area used for imaging and a first structure area surrounding the first optical area, and the bottom surface of the first structure area is bonded to the top surface of the lens barrel. The design omits a lens barrel at the periphery of the first lens, so that the top of the camera module can extend into the through hole with smaller aperture under the premise of unchanged optical design or basically unchanged optical design, thereby improving the visual experience of 'perforated screen' and reducing the thickness of the terminal equipment.

Further, fig. 6 shows a schematic cross-sectional view of an under-screen camera module according to an embodiment of the present application based on a color filter front-end design. Referring to fig. 6, in the present embodiment, the under-screen camera module includes an oled display 100 and a camera module 200. The oled display 100 has a first through hole 140, and the first through hole 140 forms an under-panel camera area. The optical axis of the camera module 200 is perpendicular to the surface of the oled display 100, and the camera module 200 is disposed at the rear end of the first through hole 140. The camera module 200 includes an extending portion 210 extending into the first through hole 140 and a main body portion 220 located at a rear end of the extending portion 210, the extending portion 210 includes at least one first optical element 211, and the main body portion 220 includes a plurality of second optical elements 221 assembled together. Referring to fig. 6, in the present embodiment, the at least one first optical element 211 is a single color filter, the plurality of second optical elements 221 include a plurality of lenses, the lenses are assembled by being supported by the lens barrel 230, and the bottom surface of the color filter is adhered to the top surface of the lens barrel 230. In this embodiment, the color filter is in front and the top of the barrel 230 acts as a diaphragm. The front lens rear focus of the camera module can be reduced by the color filter, and the overall size of the camera module is reduced.

Further, fig. 7 shows a schematic cross-sectional view of an under-screen camera assembly of another embodiment of the present application based on a color filter front-facing design. Referring to fig. 7, in the present embodiment, the color filter is advanced while using silk-screening of the surface of the color filter as a diaphragm. The light absorbing layer 211a may be formed on the surface of the color filter based on, for example, a screen printing process, thereby playing a role of preventing stray light.

Further, fig. 8 shows a schematic cross-sectional view of an under-screen camera assembly of yet another embodiment of the present application based on a color filter front-facing design. Referring to fig. 8, the color filter of the present embodiment is attached to the cover plate. Specifically, in this embodiment, the plurality of second optical elements 221 are assembled by being supported by the lens barrel 230, the organic light emitting diode display panel 100 has a cover plate 136, and the top surface of the color filter (i.e., the first optical element 211 shown in fig. 8) is adhered to the bottom surface of the cover plate 136 by an optical adhesive. In this embodiment, the top surface of the lens barrel 230 is supported against the bottom surface of the oled display 100. The cover plate 136, the sidewall 141 of the first through hole 140, the top surface of the lens barrel 230, the bottom surface of the color filter, and the adhesive material for adhesion together form a closed cavity.

Further, still referring to fig. 4, in an embodiment of the present application, the cover plate 136, the sidewall 141 of the first through hole 140, the top surface of the lens barrel 230, the top surface of the first lens, and the glue material for adhesion may jointly form a closed cavity. In this embodiment, the top surface of the barrel 230 refers to the outer surface of the top of the barrel including the step surface.

Further, still referring to fig. 5, in an embodiment of the present application, the cover plate 136, the sidewall 141 of the first through hole 140, the top surface of the lens barrel, the top surface of the first lens, and the glue material for adhesion may jointly form a closed cavity. In this embodiment, the lens barrel includes a first lens barrel 231 and a second lens barrel 232, which are bonded together to form a complete lens barrel. In this embodiment, the top surface of the lens barrel refers to the outer surface of the top of the lens barrel including the step surface.

Further, in an embodiment of the present application, the first lens is designed without a lens barrel, and the plurality of second lenses are assembled together through the lens barrel. The first lens comprises a first optical area used for imaging and a first structure area surrounding the first optical area, and the bottom surface of the first structure area is bonded to the top surface of the lens barrel. And the top surface of the lens cone is supported against the bottom surface of the organic light emitting diode display screen. The cover plate, the side wall of the first through hole, the top surface of the lens barrel, the top surface of the first lens and the glue material for adhesion can jointly form a closed cavity.

Further, in some embodiments of the present application, the color filter pre-design may be used in combination with the design of the first lens described above. For example, the at least one first optical element of the protruding portion may include a color filter and a first lens. Specifically, a color filter may be added to the through hole on the basis of the embodiment of fig. 4 or 5. The color filter can be adhered to the bottom surface of the cover plate, and also can be adhered to the top surface of the lens cone or the first lens cone. After adding the color filter, the first through hole has two first optical elements therein. In other words, the protruding portion of the camera module has two first optical elements.

In summary, in the present application, the outer side surface of the protruding portion may be retracted toward the optical axis relative to the outer side surface of the main body portion by making a material of the first optical element different from the second optical element and/or making the first optical element adopt a supporting structure or a supporting manner different from the second optical element. Thereby under the unchangeable or unchangeable prerequisite of optical design, make the top of making a video recording module can stretch into the through-hole that the aperture is littleer, and then improve the visual experience of "screen of punching" and reduce terminal equipment's thickness.

Further, fig. 9 shows a schematic cross-sectional view of an organic light emitting diode display panel in an embodiment of the present application. Referring to fig. 9, in the display panel of the present embodiment, the first through hole sidewall may have a light absorbing layer 139 (refer to fig. 4 to fig. 8 in addition to fig. 9). This design can suppress stray light generated by reflection and refraction of the first via hole sidewall. In particular, the light absorbing layer 139 is provided on the sidewall of the first through hole, which is particularly suitable for the case where the first lens is designed without a lens barrel and the case where a color filter is disposed in front. In one embodiment, the step of coating an ink layer on the sidewall of the first through hole to form the light absorbing layer. Fig. 16 shows a schematic view of the common coverage of the first via sidewall by the encapsulant layer and the ink layer. Referring to fig. 16, in another embodiment, the light absorbing layer 139 can be formed by covering the sidewall of the first through hole with a packaging material layer and then coating an ink layer on the packaging material layer. In this embodiment, the encapsulation layer 134 may be bent downward and extended to the sidewall of the first through hole 140 to form the encapsulation material layer 134 a. In other embodiments, the light absorbing layer 139 may be formed by a black glue material, which may also serve as a glue material for bonding. For example, in some embodiments, the black glue may be used to adhere the top surface of the lens barrel to the bottom surface of the substrate, and to adhere the outer side surface of the first lens barrel or the first optical element to the sidewall of the first through hole.

Further, in one embodiment of the present application, in an organic light emitting diode display screen (i.e., an OLED screen), the cover plate may be a glass cover plate. It is noted that for holes through the functional layers of the display screen other than the cover plate, which are commonly referred to in the industry as through holes, this concept is used herein. In other words, in the present application, the through hole of the oled display 100 does not penetrate the cover plate. The through-hole does not run through the apron, can avoid during debris fall into the through-hole, influences the formation of image of the module of making a video recording under the screen.

Further, in one embodiment of the present application, the substrate may be made of glass or transparent plastic. Wherein the transparent plastic may be: polyethersulfone (PES), Polyacrylate (PAR), Polyetherimide (PEI), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polyphenylene sulfide (PPS), polyallylate (polyallylate), polyimide, Polycarbonate (PC), cellulose Triacetate (TAC), and/or Cellulose Acetate Propionate (CAP).

Further, in one embodiment of the present application, the display layer is a functional layer containing a pixel light emitting structure. Generally, two electrode layers are provided above and below the display layer, and it is to be noted that these two electrode layers are not shown in fig. 3. The two electrode layers are referred to herein as a first electrode (or first electrode layer) and a second electrode (or second electrode layer), respectively. Wherein the first electrode may be patterned. Fig. 10 shows a detailed structure of the display layer, buffer layer and other peripheral functional layers in fig. 3. Referring to fig. 10, the display layer 133 includes a first electrode 133b, a pixel layer 133a, and a second electrode 133c, and the pixel layer 133a may include a plurality of pixel light emitting structures 138 and a pixel defining structure 137 filling a gap between the plurality of pixel light emitting structures 138. Further, the pixel light emitting structure 138 may include an electron injection layer, an electron transport layer, a light emitting material layer, and a hole transport layer, a hole injection layer. The first electrode and the second electrode may cover the electron injection layer and the hole injection layer, respectively. In this embodiment, the first electrode is a metal cathode, the second electrode is an anode, and the anode can be Indium Tin Oxide (ITO), Indium Zinc Oxide (IZO), zinc oxide (ZnO), or indium oxide (In) ₂O₃) At least one material selected from the group consisting of Indium Gallium Oxide (IGO) and Aluminum Zinc Oxide (AZO). The pixel electrodes need to cover the surface of the light-emitting material, the anode has light transmittance, the first electrode can be silver or silver alloy and the like, so that the cathode does not have light transmittance (the cathode does not have light transmittance through a plated reflective film), light emitted by the light-emitting layer material is completely transmitted out of the anode, the drain electrode of the thin film transistor is connected with the first electrode so as to be conducted with the pixel light-emitting structure, and a signal for driving light emission is transmitted to the display layer of the OLED screen.

Further, still referring to fig. 10, in one embodiment of the present application, the buffer layer 132 may serve as a barrier layer for reducing or preventing diffusion of impurity ions into the display layer 133, and permeation of external air or moisture therethrough. The buffer layer 132 may also planarize the surface of the substrate. In addition, the buffer layer typically also includes a TFT driver layer having a plurality of TFT cells (i.e., thin film transistors 132a) corresponding to the pixel light emitting structures to drive the pixel light emitting structures to emit light or turn off (and sometimes to drive the pixel light emitting structures to change brightness). The thin film transistor 132a may be formed on the body material of the buffer layer, and a source electrode or a gate electrode thereof is connected to the first electrode 133b of the display layer.

Further, in one embodiment of the present application, the encapsulation layer (TFE) is a thin film encapsulation layer, which is positioned over the display layer. The thin film encapsulation layer may be composed of an organic film and an inorganic film, or a plurality of organic films and inorganic films are alternately stacked. The thin film encapsulation layer functions to protect the display layer from external moisture or oxygen, wherein the inorganic film stably blocks the external moisture and oxygen, and the organic film absorbs stress on the inorganic film to impart flexibility to the inorganic film.

Further, in one embodiment of the present application, the polarizing layer (POL) includes a polarizer and 1/4 wave plates for reducing reflection of natural light and improving contrast of the display screen, and typically further includes a touch layer (or referred to as a touch layer).

Further, fig. 11 shows a schematic view of a substrate with an OLED screen having positioning marks. Referring to fig. 11, in an embodiment of the present application, to facilitate assembling the under-screen camera module, at least two positioning marks 150 may be disposed on the substrate of the OLED screen, and the positioning marks 150 are used for position recognition during the assembling process of the OLED screen and the camera module, so as to improve the assembling precision (e.g., improve the alignment precision of the light-passing holes). This location mark does not overlap with the module of making a video recording in the projection of display screen to module and display screen of making a video recording can real-time correction position when the equipment. The camera module and the OLED screen can be fixedly bonded by arranging the adhesive material on the contact surface, and the camera module can be tightly attached to the OLED screen and bonded by the side adhesive or bonded at two positions (the contact surface and the side surface) simultaneously. The positioning mark can be an ink pattern, or can be realized by laser marking, or can be formed by grooving the substrate of the OLED screen, or is a special structure integrally formed with the substrate.

Further, in an embodiment of the present application, there is also provided a terminal device, which includes the under-screen camera module described in any of the foregoing embodiments. The camera module can be used as a front camera module of the terminal equipment, and the organic light emitting diode display screen can be used as a display panel on the front side of the terminal equipment.

Further, fig. 17 shows a first lens in an embodiment of the present application. In this embodiment, in the under-screen camera module, the first optical element 211 is a first lens and the first lens is a bare lens (i.e., the camera module adopts a split structure and the extending portion does not have a first lens barrel). The first lens can be a molded glass lens. The first lens includes a first optical zone 211a for imaging and a first structured zone 211b surrounding the first optical zone 211 a. Wherein the outer diameter D1 (outer diameter) of the first optical zone 211a may be 1.4mm, and the outer diameter D2 (outer diameter) of the first structured zone may be 2.5 mm. It is noted that the outer diameter of the first optical zone is actually the inner diameter of the first structured zone. Molded glass lenses may have a smaller radial dimension for the lens assembly than injection molded lenses, thus helping to reduce the aperture size of the display screen. It is easy to understand that when the outer diameter of the first structure region of the first lens is less than 2.5mm, the reduction of the opening size of the display screen is more facilitated. In other embodiments, the molded glass lens may also serve as the first optical element to reduce the radial dimension of the first optical element to help reduce the size of the opening of the display screen.

The above description is only a preferred embodiment of the present application and is illustrative of the principles of the technology employed. It will be appreciated by a person skilled in the art that the scope of the invention as referred to in the present application is not limited to the embodiments with a specific combination of the above-mentioned features, but also covers other embodiments with any combination of the above-mentioned features or their equivalents without departing from the inventive concept. For example, the above features may be replaced with (but not limited to) features having similar functions disclosed in the present application.

Claims (29)

1. Subassembly of making a video recording under screen, its characterized in that includes:

an organic light emitting diode display screen having a first through hole; and

the optical axis of the camera module is vertical to the surface of the organic light-emitting diode display screen, and the camera module is arranged at the rear end of the first through hole,

the camera module comprises an extending part extending into the first through hole and a main body part located at the rear end of the extending part, the extending part comprises at least one first optical element, the main body part comprises a plurality of second optical elements which are assembled together, and the outer side face of the extending part retracts relative to the outer side face of the main body part to the optical axis by making the first optical element different from the manufacturing material of the second optical elements and/or making the first optical element adopt a supporting structure or a supporting mode different from the second optical elements.

2. The underscreen camera assembly according to claim 1, wherein the at least one first optical element is a single first lens and the plurality of second optical elements comprises a plurality of second lenses.

3. The underscreen camera assembly according to claim 1, wherein the at least one first optical element is a single color filter.

4. The underscreen camera assembly of claim 1, wherein the at least one first optical element is a color filter and a first lens and the plurality of second optical elements comprises a plurality of second lenses.

5. The assembly of claim 2 or 4, wherein the first lens is a glass lens and the second lens is a plastic lens.

6. The assembly of claim 2 or 4, wherein the first lens and the second lens are mounted in the same barrel that is integrally formed; the lens barrel comprises a first section accommodated in the first through hole and a second section positioned outside the first through hole, wherein the outer side surface of the first lens is abutted against the inner side surface of the first section; the outer side of the first segment is indented towards the optical axis relative to the outer side of the second segment.

7. The underscreen camera assembly of claim 6, wherein a thickness of the first segment is less than a thickness of the second segment.

8. The assembly of claim 6, wherein the inner surface of the barrel has a plurality of steps, and the first lens and the second lens are assembled together by sequentially fitting the first lens and the second lens into the plurality of steps.

9. The assembly of claim 2 or 4, wherein the protruding portion has a first barrel, and the first lens is mounted in the first barrel; the main body part is provided with a second lens barrel, and the plurality of second lenses are arranged in the second lens barrel.

10. The assembly of claim 9, wherein the first lens and the plurality of second lenses are assembled together by bonding a top surface of the second barrel to a bottom surface of the first barrel and/or the structural region of the first lens.

11. The assembly of claim 9, wherein the protruding portion is bonded to the main body portion after active calibration, the active calibration being a process of optimally adjusting a relative position of the protruding portion to the main body portion based on an actual imaging result.

12. The assembly of claim 11, wherein the protrusion portion has a non-zero angle with a central axis of the main body portion.

13. The underscreen camera assembly of claim 2 or 4, wherein an outer side of the first lens is free of a barrel support.

14. The underscreen camera assembly according to claim 13, wherein the plurality of second lenses are assembled by support of a lens barrel; the first lens comprises a first optical area used for imaging and a first structure area surrounding the first optical area, and the bottom surface of the first structure area is bonded to the top surface of the lens barrel.

15. The video camera of claim 14, wherein the top surface of the lens barrel rests against the bottom surface of the oled display.

16. The assembly of claim 15, wherein the oled display panel has a cover plate, and the cover plate, the sidewall of the first through hole, the top surface of the lens barrel, the top surface of the first lens, and the adhesive material for adhesion together form a closed cavity.

17. The assembly of claim 14, wherein the protruding portion is bonded to the main body portion after active calibration, the active calibration being a process of optimally adjusting a relative position of the protruding portion to the main body portion based on an actual imaging result.

18. The assembly of claim 17, wherein the protrusion portion has a non-zero angle with a central axis of the main body portion.

19. The underscreen camera assembly of claim 3, wherein the plurality of second optical elements are assembled by being supported by a lens barrel, and wherein the bottom surface of the color filter is bonded to the top surface of the lens barrel.

20. The video camera module of claim 3, wherein the plurality of second optical elements are assembled by being supported by a lens barrel, the organic light emitting diode display panel has a cover plate, and the top surface of the color filter is adhered to the bottom surface of the cover plate by an optical cement.

21. The assembly of claim 19 or 20, wherein a top surface of the barrel rests against a bottom surface of the oled display.

22. The assembly of claim 21, wherein the oled display panel has a cover plate, and the cover plate, the sidewall of the first through hole, the top surface of the lens barrel, the top surface of the color filter, and the adhesive material for adhesion together form a closed cavity.

23. The underscreen camera assembly of claim 1, wherein the first via sidewall has a light absorbing layer.

24. The assembly of claim 6, wherein a top portion of the barrel acts as a stop for the camera module.

25. The assembly of claim 14, wherein a top portion of the barrel acts as a stop for the camera module.

26. The assembly of claim 9, wherein a top portion of the first barrel acts as a stop for the camera module.

27. The under-screen camera assembly according to claim 1, wherein the oled display has a substrate provided with positioning marks for aligning the camera module with the through-hole during assembly.

28. Terminal device, characterized in that it comprises an underscreen camera module according to any one of claims 1 to 27.

29. The terminal device according to claim 28, wherein the camera module is a front camera module of the terminal device, and the organic light emitting diode display screen is a display panel on a front surface of the terminal device.

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