CN112543262B - Camera module, under-screen camera assembly and corresponding electronic equipment - Google Patents
Camera module, under-screen camera assembly and corresponding electronic equipment Download PDFInfo
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- CN112543262B CN112543262B CN201910891101.5A CN201910891101A CN112543262B CN 112543262 B CN112543262 B CN 112543262B CN 201910891101 A CN201910891101 A CN 201910891101A CN 112543262 B CN112543262 B CN 112543262B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0264—Details of the structure or mounting of specific components for a camera module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/0202—Portable telephone sets, e.g. cordless phones, mobile phones or bar type handsets
- H04M1/026—Details of the structure or mounting of specific components
- H04M1/0266—Details of the structure or mounting of specific components for a display module assembly
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/57—Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices
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Abstract
The invention relates to a camera module, which comprises a first optical element and a plurality of second optical elements positioned at the rear end of the first optical element; the first optical element is a glass plate which is not subjected to color filtering treatment, the light incident surface and the light emergent surface of the glass plate are planes, and the light incident surface is suitable for bearing the display screen. Wherein, the color filtering treatment comprises plating a cut-off film on the surface of the glass plate or doping a color-filtering substance component in the manufacturing material of the glass plate. The invention also provides a corresponding under-screen camera shooting assembly and electronic equipment. The invention can improve the bonding reliability and firmness of the camera module and the display screen, simultaneously avoid the image quality of the camera module from being reduced, and improve the production efficiency and yield of the camera module under the screen.
Description
Technical Field
The present application relates to optical imaging technology and display technology, and in particular, to a camera module, an under-screen camera module, and a corresponding electronic 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 area of the "punched" or "punched" portion of the display screen is large (for example, the aperture of a circular hole is usually larger than 4mm), and such hole punching adversely affects 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 existing technology of 'punching screens', the punching scheme of the OLED screen is usually to punch through holes so as to prevent the shielding of the OLED screen from causing the insufficient light incoming amount of the camera module under the screen. However, the process of fabricating the OLED screen needs to be modified more, which increases the process difficulty of the OLED screen, and thus has adverse effects on yield and cost under mass production conditions. 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 usually significantly larger than that of the OLED screen, which makes it difficult to make a terminal device (e.g., a mobile phone) carrying an under-screen camera module thin. If the blind hole screen scheme is applied to an OLED screen, the light transmission amount of the blind hole area needs to be improved to ensure that the under-screen camera module has enough light incoming amount.
On the other hand, consumer electronics generally require excellent reliability, which puts high demands on the reliability of the assembly of the screen and the under-screen camera module. Further, the current consumer electronics market is in great demand and product upgrades are extremely fast. Therefore, it is also desirable that the design scheme of the camera module for the portable electronic device (such as a smart phone) is suitable for mass production, and contributes to the improvement of the production efficiency and the production yield.
In summary, there is a need for an under-screen camera solution that can reduce the size of the drilled hole (or even eliminate the drilled hole) and is helpful for reducing the thickness of the terminal device (i.e., the electronic device carrying the under-screen camera module), and further, there is a need for an under-screen camera solution that has high reliability and is helpful for improving the production efficiency and the production yield.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a solution for under-screen shooting.
In order to solve the above technical problem, the present invention provides a camera module, which is arranged at the rear end of a display screen and used as an under-screen camera module, wherein the camera module comprises a first optical element and a plurality of second optical elements located at the rear end of the first optical element; the first optical element is a glass plate which is not subjected to color filtering treatment, the light incident surface and the light emergent surface of the glass plate are planes, the light incident surface is suitable for bearing a display screen, and the display screen is an organic light emitting diode display screen or a liquid crystal display screen; wherein, the color filtering treatment comprises plating a cut-off film on the surface of the glass plate or doping a color-filtering substance component in the manufacturing material of the glass plate.
The camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on the inner side surface of the lens barrel and are assembled together through the lens barrel; the first optical element comprises a first optical area which is light-transmitting and a first structure area which surrounds the first optical area, and the bottom surface of the first structure area is arranged on the top surface of the lens barrel.
And a diaphragm is arranged on the top surface of the first structure area.
Wherein the top surface of the lens barrel has an exposed area not covered by the first optical element, and the exposed area forms a step with the outer side surface of the first optical element.
Wherein the top surface of the lens barrel includes an inner region and an outer region lower than the inner region to form an annular step, and the bottom surface of the first optical element is attached to the inner region of the top surface of the lens barrel.
The middle area of the top surface of the lens barrel extends upwards to form an annular extension part, and the first optical element is installed on the inner side of the annular extension part.
Wherein the annular extension part divides the top surface of the lens barrel into an inner region located inside the annular extension part and an outer region located outside the annular extension part, and the outer region is lower than the inner region.
Wherein a diaphragm is provided by inking or plating a light absorbing layer on the top surface of the first structure region.
According to another aspect of the present application, there is also provided an off-screen camera assembly, including: any one of the camera modules; the display area of the organic light-emitting diode display screen comprises an under-screen image pickup area and a non-under-screen image pickup area, the optical axis of the image pickup module is perpendicular to the surface of the organic light-emitting diode display screen, and the image pickup module is positioned at the rear end of the under-screen image pickup area; wherein the top surface of the first optical element is supported and adhered to the organic light emitting diode display screen through optical cement.
The organic light-emitting diode display screen comprises a substrate, a buffer layer positioned on the substrate, a display layer, an encapsulation layer and a polarizing layer, wherein the display layer, the encapsulation layer and the polarizing layer are positioned on the buffer layer; in the organic light emitting diode display screen, the pixel pitch of the under-screen image pickup region is greater than the pixel pitch of the non-under-screen image pickup region.
The organic light emitting diode display screen comprises a substrate, a buffer layer positioned on the substrate, a display layer, an encapsulation layer and a polarizing layer, wherein the display layer, the encapsulation layer and the polarizing layer are positioned on the buffer layer; in the organic light emitting diode display screen, the pixel pitch of the under-screen image pickup area is larger than the pixel pitch of the non-under-screen image pickup area.
The polarizing layer is provided with a through hole corresponding to the under-screen image pick-up area.
The organic light emitting diode display screen comprises a substrate, a buffer layer positioned on the substrate, a display layer, an encapsulation layer, a polarizing layer and a cover plate, wherein the display layer, the encapsulation layer, the polarizing layer and the cover plate are positioned on the buffer layer; wherein a part of the camera module extends into the through hole, and the top surface of the first optical element is supported and adhered to the bottom surface of the cover plate through the optical cement.
Wherein a top surface of the lens barrel has an exposed area not covered by the first optical element; wherein an area between the exposed area, the outer side surface of the first optical element, and the bottom surface of the substrate accommodates the optical glue that overflows.
Wherein a top surface of the lens barrel has an exposed area not covered by the first optical element; wherein an area between the exposed area, the outer side surface of the first optical element, the first bottom surface, and the bottom surface of the substrate accommodates the optical glue that overflows.
Wherein the top surface of the lens barrel includes an inner region and an outer region lower than the inner region to form an annular step, and the bottom surface of the first optical element is attached to the inner region; wherein a region between the outer region, the side surface of the annular step, and the bottom surface of the substrate accommodates the optical cement that overflows.
Wherein the top surface of the lens barrel includes an inner region and an outer region lower than the inner region to form an annular step, and the bottom surface of the first optical element is attached to the inner region; wherein a region between the outer region, the side surface of the annular step, the first bottom surface, and the bottom surface of the substrate accommodates the optical cement that overflows.
Wherein, the middle area of the top surface of the lens barrel extends upwards to form an annular extension part, the first optical element is installed on the inner side of the annular extension part, the annular extension part divides the top surface of the lens barrel into an inner area positioned on the inner side of the annular extension part and an outer area positioned on the outer side of the annular extension part, and the outer area is lower than the inner area; wherein an area between the outer side area, the outer side surface of the annular extension portion, and the bottom surface of the base plate accommodates the optical cement that overflows.
Wherein, the middle area of the top surface of the lens barrel extends upwards to form an annular extension part, the first optical element is installed on the inner side of the annular extension part, the annular extension part divides the top surface of the lens barrel into an inner area positioned on the inner side of the annular extension part and an outer area positioned on the outer side of the annular extension part, and the outer area is lower than the inner area; wherein a region between the outer region, the outer side surface of the annular extension, the first bottom surface, and the bottom surface of the substrate accommodates the optical cement that overflows.
The lens cone is bonded with the organic light-emitting diode display screen through a second adhesive material, and the second adhesive material is arranged in at least two of a gap between the outer side area and the bottom surface of the substrate, a gap between the outer side area and the first bottom surface, and a gap between the top surface of the annular extension portion and the first bottom surface.
According to another aspect of the present application, there is provided another under-screen camera assembly, including: any one of the camera modules; the display area of the liquid crystal display screen comprises an under-screen camera shooting area and a non-under-screen camera shooting area, the optical axis of the camera shooting module is perpendicular to the surface of the liquid crystal display screen, and the camera shooting module is positioned at the rear end of the under-screen camera shooting area; the lower camera shooting area is formed by a through hole, the liquid crystal display screen is provided with a cover plate, the through hole is covered by the cover plate, one part of the camera shooting module extends into the through hole, and the top surface of the first optical element is supported by optical cement and adhered to the bottom surface of the cover plate.
According to still another aspect of the present application, there is also provided an electronic device including: the camera module is used as a front camera module of the electronic equipment, and the organic light emitting diode display screen is used as a display panel on the front side of the electronic equipment.
Compared with the prior art, the application has at least one of the following technical effects:
1. the under-screen camera module is suitable for being directly bonded with a display screen (such as an OLED or an LCD display screen).
2. The utility model provides a module of making a video recording under screen is high with the bonding reliability of display screen, helps guaranteeing the formation of image quality of the module of making a video recording under the screen.
3. The utility model provides a module structure of making a video recording under screen is compatible strong with current ripe technology, helps improving production efficiency and production yield, is particularly suitable for extensive volume production.
4. The utility model provides a module of making a video recording under screen has strengthened the bonding reliability and the fastness of module of making a video recording and display screen through increase the plane glass board at the top, can also avoid newly-increased component to cause negative effects to imaging quality simultaneously.
5. In some embodiments of this application, set up through the module of making a video recording under the screen and the screen subassembly of making a video recording and hold the accommodation space that overflows the optical cement, can help more evenly at whole glass plate surface coating optical cement to guarantee imaging quality and bonding reliability and fastness, still help promoting production efficiency and yield simultaneously.
Drawings
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 is an enlarged schematic view of an under-screen camera area and a camera module of the under-screen camera assembly according to an embodiment of the present application;
fig. 4 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to another embodiment of the present application;
fig. 5 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to still another embodiment of the present application;
fig. 6 is an enlarged schematic view of an under-screen image pickup area and an image pickup module of an under-screen image pickup assembly according to still another embodiment of the present application;
fig. 7 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to another embodiment of the present application;
fig. 8 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to still another embodiment of the present application;
fig. 9 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to still another embodiment of the present application;
fig. 10 is an enlarged schematic view of an under-screen camera area and a camera module of an under-screen camera assembly according to still another embodiment of the present application;
fig. 11 is an enlarged schematic view of an under-screen image pickup area and an image pickup module of an under-screen image pickup assembly according to an embodiment of the present application in which a through hole is provided in a polarizing layer;
FIG. 12 is an enlarged schematic view of the under-screen imaging region and the camera module of the under-screen imaging assembly according to another alternative embodiment of the present application in which the polarizer layer is provided with through holes;
fig. 13 is an enlarged schematic view of an under-screen image pickup area and an image pickup module of an under-screen image pickup assembly according to still another modified embodiment of the present application in which through holes are provided in a polarizing layer.
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, the use of "may" mean "one or more embodiments of the application" when describing embodiments of the application. Also, the term "exemplary" is intended to refer to examples or illustrations.
As used herein, the terms "substantially," "about," and the like are used as words of table approximation, not as words of table degree, and are intended to account for inherent deviations in measured or calculated values that would be recognized by one 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.
FIG. 1 shows a schematic cross-sectional view of an underscreen camera assembly of an embodiment of the present application. Referring to fig. 1, in the present embodiment, 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 organic light emitting diode display panel 100 may adopt a special structural design to construct the under-panel imaging region 120 with high transmittance, and the structural design for improving the transmittance of the under-panel imaging region 120 will be further described with reference to some embodiments, which will not be described herein for a while.
Further, fig. 3 shows an enlarged schematic view of the under-screen image capturing area and the image capturing module of the under-screen image capturing assembly in an embodiment of the present application. Referring to fig. 3, the camera module 200 includes a first optical element 210 and a plurality of second optical elements 220 located at the rear end of the first optical element 210, the first optical element 210 is a glass plate without color filtering, the light incident surface and the light emitting surface of the glass plate are both flat, and the light incident surface is suitable for bearing the oled display; wherein, the color filtering treatment comprises plating a cut-off film on the surface of the glass plate or doping a color-filtering substance component in the manufacturing material of the glass plate. Note that, in the prior art, a blue glass is often used as an IR color filter, and the blue glass usually contains phosphate ions and copper ions for absorbing infrared rays, and in this case, the phosphate ions and copper ions can be regarded as a color-filterable substance component doped in a material for making a glass plate. Further, 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. The substrate 131 may have a through hole 131a corresponding to the under-screen image pickup region such that a first bottom surface 132a of the buffer layer 132 corresponding to the under-screen image pickup region is exposed and a top surface of the first optical element 210 bears against the first bottom surface 132 a. In this embodiment, the camera module may include a color filter disposed between the last second optical element 220 and the photo sensor chip (the color filter and the photo sensor chip are not shown in fig. 3). The structure of the module of making a video recording under the screen (the module of making a video recording that this embodiment provided is used as the module of making a video recording under the screen usually) in this embodiment is close with the structure of the module of making a video recording of tradition, has good technology compatibility. And the module top of making a video recording sets up the glass board under the screen, can show to improve the module of making a video recording and the bonded reliability of organic light emitting diode display screen under the prerequisite of avoiding causing the influence to the module imaging light path of making a video recording. The subassembly of making a video recording under the screen belongs to the optical system that is very sensitive to the position disturbance, and the module of making a video recording and the tiny disturbance of the relative position of organic light emitting diode display screen just probably cause the obvious decline of formation of image quality (for example the image of shooing is fuzzy), and the module of making a video recording under the screen of this embodiment can solve above-mentioned problem well.
Further, still referring to fig. 3, in an embodiment of the present application, the camera module further includes an integrally formed lens barrel 230, the plurality of second optical elements 220 are mounted on an inner side 231 of the lens barrel 230 and the plurality of second optical elements 220 are assembled together through the lens barrel 230; the first optical element 210 includes a first optical area transmitting light and a first structure area 212 surrounding the first optical area, and a bottom surface of the first structure area 212 is mounted on (e.g., adhered to) a top surface of the lens barrel 230. The top surface of the first optical element is supported and adhered to the first bottom surface 132a by optical cement. In this embodiment, the optical cement may be applied to the entire top surface of the first optical element, and therefore, compared with a scheme of directly pasting the top surface of the lens barrel 230 and the bottom surface of the display screen 100, the firmness and reliability of the bonding, the bonding smoothness and the bonding between the camera module and the display screen may be increased, and the damage rate of the camera module and the display screen may be further reduced. Moreover, because a part of the camera module can extend into the through hole of the substrate, the distance from the pixel array to the light-sensitive surface can be reduced, and the influence of the projection spot of the pixel array on the light-sensitive surface on imaging can be reduced.
Further, fig. 4 shows an enlarged schematic view of the under-screen image capturing area and the image capturing module of the under-screen image capturing assembly according to another embodiment of the present application. For the sake of simplicity, fig. 4 simplifies the structure of the oled display 100, and some functional layers are combined together, specifically, the buffer layer 132, the display layer 133, the encapsulation layer 134, and the polarization layer 135 (see fig. 3) are combined into the main functional layer 130a in fig. 4, and the substrate 131 and the cover plate 136 are retained. Referring to fig. 4, in the present embodiment, the substrate 131 is not perforated. The top surface of the first optical element 210 may be supported and adhered to the bottom surface of the substrate 131 by an optical adhesive. In this embodiment, optical cement can coat in first optical element's whole top surface, consequently, compare the scheme of directly pasting lens cone top surface and display screen bottom surface, this embodiment can increase module and display screen bonding area, bonding smoothness and the firm, the reliability of bonding. Moreover, the damage rate of the camera module and the display screen can be reduced.
Further, still referring to fig. 4, according to an embodiment of the present application, the top surface of the first structure region 212 may be provided with a diaphragm. This stop may be achieved by inking or plating a light absorbing layer on top of the first structure region 212. In this embodiment, the optical adhesive may be applied to the entire top surface of the first optical element 210, so that, compared with a scheme of directly adhering the top surface of the lens barrel to the bottom surface of the display screen, the present embodiment may increase the adhering area, the adhering smoothness, and the firmness and reliability of the adhesion between the module and the display screen. Moreover, the damage rate of the camera module and the display screen can be reduced. In addition, in this embodiment, the diaphragm of the camera module is moved forward to the top surface of the glass plate (i.e., the first optical element), so that the diffraction effect is reduced, the imaging range is enlarged, and the image is clear.
Further, still referring to fig. 4, in the present embodiment, the top surface of the lens barrel has an exposed region not covered by the first optical element, and the exposed region forms a step with the outer side surface of the first optical element. The step is adapted to receive the optical cement that overflows, so that the entire top surface of the first optical element (glass plate) can be coated with the optical cement more uniformly, so as to improve the bonding reliability. In the embodiment, the operation of arranging the optical cement between the display screen and the first optical element has better fault tolerance, thereby being beneficial to improving the production efficiency and the production yield. Also, due to the better tolerance to faults, the optical glue can be better arranged over the entire top surface of the first optical element, resulting in better bonding reliability in actual production.
Further, fig. 5 shows an enlarged schematic view of an under-screen image capturing area and an image capturing module of an under-screen image capturing assembly according to another embodiment of the present application. For simplicity of illustration, FIG. 5 is a simplified process similar to FIG. 4. Referring to fig. 5, in the present embodiment, the substrate 131 has no opening, and the top surface of the first optical element is supported and adhered to the bottom surface of the substrate 131 by the optical adhesive. Further, the top surface of the lens barrel 230 includes an inner region 230b and an outer region 230a lower than the inner region 230b to form a ring-shaped step, and the bottom surface of the first optical element 210 is attached to the inner region 230b of the top surface of the lens barrel 230. The design of the embodiment can leave more space for accommodating the overflowing optical cement, so that the whole top surface of the first optical element (glass plate) can be coated with the optical cement, and the bonding reliability is improved; meanwhile, the scheme is also beneficial to improving the production efficiency and the production yield.
Further, fig. 6 shows an enlarged schematic view of an under-screen image capturing area and an image capturing module of an under-screen image capturing assembly according to still another embodiment of the present application. For simplicity of illustration, FIG. 6 is a simplified process similar to FIG. 4. Referring to fig. 6, in one embodiment of the present application, a middle region of the top surface of the lens barrel 230 extends upward to form an annular extension 239, and the first optical element 210 is mounted inside the annular extension 239. The annular extension 239 divides the top surface of the lens barrel into an inner region 230b located inside the annular extension 239 and an outer region 230a located outside the annular extension 239, and the outer region 230a is lower than the inner region 230 b. In this embodiment, a step is formed on the outer side of the annular extension portion 239, the step can accommodate the overflowing optical cement (the optical cement can be disposed on the entire top surface of the first optical element 210), and another type of cement (the cement may not be the optical cement) can be disposed on the step on the outer side of the annular extension portion 239 to reinforce the bonding between the display screen 100 and the camera module 200.
Further, still referring to fig. 6, in one embodiment of the present application, the top surface of the annular extension 239 is lower than the top surface of the first optical element 210. Further, fig. 7 shows an enlarged schematic view of the under-screen image capturing area and the image capturing module of the under-screen image capturing assembly according to another embodiment of the present application. In this embodiment, the top surface of the annular extension portion 239 is flush with the top surface of the first optical element 210, and the rest of the structure is completely the same as that of the embodiment in fig. 6, and is not repeated.
Further, fig. 8 shows an enlarged schematic view of the under-screen image pickup area and the image pickup module of the under-screen image pickup assembly according to still another embodiment of the present application. For simplicity of illustration, FIG. 8 is a simplified process similar to FIG. 4. Unlike fig. 4, the substrate in this embodiment has a through hole 131a so that a first bottom surface 132a of the buffer layer 132 (refer to fig. 3) corresponding to the under-screen image pickup region is exposed, and a top surface of the first optical element 210 is seated on the first bottom surface 132 a. Specifically, the top surface of the first optical element 210 is supported and adhered to the first bottom surface 132a by the optical adhesive. In this embodiment, in the organic light emitting diode display screen, a pixel pitch of the image pickup area under the screen is greater than a pixel pitch of the image pickup area without the screen. Wherein the area between the outer region 230a, the outer side surface of the annular extension 239, the first bottom surface 132a and the bottom surface of the substrate 131 can accommodate the overflowing optical glue (referring to the optical glue disposed on the top surface of the first optical element 210).
In a variant embodiment, the substrate 131 may be provided without through holes, and the top surface of the first optical element 210 bears against the bottom surface of the substrate 131. Wherein the area between the outer side region 230a, the outer side surface of the annular extension 239, and the bottom surface of the substrate 131 can accommodate the optical cement that overflows.
Further, still referring to fig. 8, in an embodiment of the present application, the lens barrel 230 may be bonded to the oled display 100 through a second adhesive material to reinforce the bonding between the display 100 and the camera module 200, so as to further improve the bonding reliability. The second glue material may be disposed at two of three positions, i.e., a gap between the outer region 230a and the bottom surface of the substrate 131, a gap between the outer region 230a and the first bottom surface 132a, and a gap between the top surface of the annular extension portion 239 and the first bottom surface 132a, or disposed at all three positions.
Further, fig. 9 shows an enlarged schematic view of an under-screen image capturing area and an image capturing module of an under-screen image capturing assembly according to still another embodiment of the present application. For simplicity of illustration, FIG. 9 performs a simplified process similar to that of FIG. 4. Unlike fig. 4, the substrate of this embodiment has a through hole 131a, so that the first bottom surface 132a of the buffer layer 132 corresponding to the under-screen image pickup region is exposed, and the top surface of the first optical element 210 is supported against the first bottom surface 132 a. Specifically, the top surface of the first optical element 210 is supported and adhered to the first bottom surface 132a by the optical adhesive. In this embodiment, in the oled display 100, the pixel pitch of the image capture area under the panel is greater than the pixel pitch of the image capture area without the panel. Wherein the area between the outer side region 230a, the outer side surface of the annular extension 239, the first bottom surface 132a and the bottom surface of the substrate 131 can accommodate the optical cement that overflows. In this embodiment, the first structure region 212 of the first optical element 210 has a stop 212a disposed on a top surface thereof. The stop 212a may be implemented by inking or plating a light absorbing layer on the top surface of the first structure region 212. The diaphragm of the camera module moves forward to the top surface of the glass plate (i.e. the first optical element 210), so that the diffraction effect is reduced, the imaging range is enlarged, and the imaging is clear.
Further, fig. 10 shows an enlarged schematic view of the under-screen image pickup area and the image pickup module of the under-screen image pickup assembly according to still another embodiment of the present application. For simplicity of illustration, FIG. 10 is a simplified process similar to that of FIG. 4. Unlike fig. 4, in the present embodiment, the organic light emitting diode display panel has a through hole 100a penetrating the substrate, the buffer layer, the display layer, the encapsulation layer, and the polarizing layer (i.e., the through hole 100a penetrating the substrate 131 and the main functional layer 130 a) corresponding to the under-panel image pickup region, and the cover plate 136 covers the through hole 100 a; a portion of the camera module 200 extends into the through hole 100a, and the top surface of the first optical element 210 can be supported and adhered to the bottom surface of the cover plate 136 through the optical adhesive (the optical adhesive is not shown in fig. 10, it should be noted that after the optical adhesive is adhered, the optical adhesive will fill a gap between the bottom surface of the cover plate 136 and the top surface of the first optical element 210, so that the top surface of the first optical element 210 is supported by the bottom surface of the cover plate 136). Note that the organic light emitting diode display panel in this embodiment may be replaced by an LCD display panel (i.e., a liquid crystal display panel). When the through hole penetrating through the substrate and the main functional layer is formed in the screen lower image pickup area of the LCD display screen, the screen lower image pickup area has high light transmittance, and the light inlet quantity requirement of the screen lower image pickup module can be met. At this time, the top of the through hole may be covered by a cover plate, a part of the camera module may extend into the through hole, and the top surface of the first optical element may be supported by the optical adhesive and adhered to the bottom surface of the cover plate.
Further, fig. 11 is an enlarged schematic view of the under-screen image pickup area and the image pickup module of the under-screen image pickup assembly according to the embodiment of the present application in which the through hole is provided in the polarizing layer. In fig. 11, the polarizing layer 135 and the display function layer 130b are shown separately. The polarizing layer 135 and the display function layer 130b constitute the main function layer 130a in fig. 6. Referring to fig. 11, in the present embodiment, the polarizing layer 135 has a through hole 135a corresponding to the under-screen image pickup area, and the through hole 135a may be filled with an optical adhesive. The rest of the structure of this embodiment is the same as that of fig. 6, and is not described again.
Fig. 12 is an enlarged schematic view of the under-screen image pickup area and the image pickup module of the under-screen image pickup assembly according to another modified embodiment of the present application in which the through holes are provided in the polarizing layer. In fig. 12, the polarizing layer 135 and the display function layer 130b are shown separately. The polarizing layer 135 and the display function layer 130b constitute the main function layer 130a in fig. 8. Referring to fig. 12, in the present embodiment, the polarizing layer 135 has a through hole 135a corresponding to the under-screen image pickup area, and the through hole 135a may be filled with an optical adhesive. The rest of the structure of this embodiment is the same as that of fig. 8, and is not described again.
Fig. 13 is an enlarged schematic view of an under-screen image pickup area and an image pickup module of an under-screen image pickup assembly according to still another modified embodiment of the present application in which through holes are provided in a polarizing layer. In fig. 13, the polarizing layer 135 and the display function layer 130b are shown separately. The polarizing layer 135 and the display function layer 130b constitute the main function layer 130a in fig. 9. Referring to fig. 13, in the present embodiment, the polarizing layer 135 has a through hole 135a corresponding to the under-screen image pickup area, and the through hole 135a may be filled with an optical adhesive. The rest of the structure of this embodiment is the same as that of fig. 9, and is not described again.
Further, in one embodiment of the present application, the thickness of the glass plate may be the same as the thickness of a color filter (e.g., 0.21mm) commonly used in a camera module (e.g., a mobile phone camera module), and the thickness of the optical adhesive may be 0.02mm to 0.05 mm. When the thickness of optical cement is too small, the problem of insufficient adhesive force may exist, and when the thickness of optical cement is too large, the imaging quality of the camera module may be negatively affected.
Further, in an embodiment of the present application, an electronic device is further provided, which may include the camera module in any of the foregoing embodiments, wherein the camera module may serve as a front camera module of the electronic device, and the organic light emitting diode display screen serves as a display panel on a front surface of the electronic device.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (21)
1. A camera module is used for being arranged at the rear end of a display screen and used as an under-screen camera module, and is characterized by comprising a first optical element and a plurality of second optical elements positioned at the rear end of the first optical element; the first optical element is a glass plate which is not subjected to color filtering treatment, the light incident surface and the light emergent surface of the glass plate are planes, the light incident surface is suitable for bearing a display screen, and the display screen is an organic light emitting diode display screen or a liquid crystal display screen; wherein, the color filtering treatment comprises plating a cut-off film on the surface of the glass plate or doping a material capable of filtering color in the manufacturing material of the glass plate;
the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on the inner side surface of the lens barrel and are assembled together through the lens barrel; the first optical element comprises a first optical area which is light-transmitting and a first structure area which surrounds the first optical area, and the bottom surface of the first structure area is arranged on the top surface of the lens barrel;
the light incident surface and the light emergent surface of the first optical element are respectively the top surface and the bottom surface of the glass plate, the top surface of the first optical element is supported and adhered to the display screen through optical cement, and the optical cement covers the whole top surface of the first optical element.
2. The camera module of claim 1, wherein a top surface of the first structural region is provided with a diaphragm.
3. The camera module according to claim 1, wherein the top surface of the lens barrel has an exposed area not covered by the first optical element, the exposed area forming a step with an outer side surface of the first optical element.
4. The camera module according to claim 1, wherein the top surface of the lens barrel includes an inner region and an outer region lower than the inner region so as to form an annular step, and the bottom surface of the first optical element is attached to the inner region of the top surface of the lens barrel.
5. The camera module of claim 1, wherein a middle region of the top surface of the barrel extends upward to form an annular extension, and the first optical element is mounted inside the annular extension.
6. The camera module according to claim 5, wherein the annular extension portion divides the top surface of the lens barrel into an inner region located inside the annular extension portion and an outer region located outside the annular extension portion, and the outer region is lower than the inner region.
7. The camera module of claim 1, wherein the aperture is provided by inking or plating a light absorbing layer on a top surface of the first structural region.
8. An under-screen camera assembly, comprising:
the camera module of any one of claims 1-7; and
the display area of the organic light-emitting diode display screen comprises an under-screen camera area and a non-under-screen camera area, 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 positioned at the rear end of the under-screen camera area;
wherein the top surface of the first optical element is supported and adhered to the organic light emitting diode display screen through optical cement.
9. The assembly of claim 8, wherein the oled display comprises a substrate, a buffer layer on the substrate, and a display layer, an encapsulation layer, and a polarizing layer on the buffer layer, wherein a top surface of the first optical element is supported by and adhered to the substrate by the optical glue; in the organic light emitting diode display screen, the pixel pitch of the under-screen image pickup area is larger than the pixel pitch of the non-under-screen image pickup area.
10. The under-screen image capture assembly of claim 8, wherein the organic light emitting diode display panel comprises a substrate, a buffer layer on the substrate, and a display layer, an encapsulation layer, and a polarizing layer on the buffer layer, the substrate having a through hole corresponding to the under-screen image capture area such that a first bottom surface of the buffer layer corresponding to the under-screen image capture area is exposed, a top surface of the first optical element being supported against and adhered to the first bottom surface by the optical glue; in the organic light emitting diode display screen, the pixel pitch of the under-screen image pickup area is larger than the pixel pitch of the non-under-screen image pickup area.
11. The assembly of claim 9 or 10, wherein the polarizing layer has through holes corresponding to the under-screen image capture area.
12. The off-screen camera assembly of claim 8, wherein the organic light emitting diode display screen comprises a substrate, a buffer layer over the substrate, and a display layer, an encapsulation layer, a polarizing layer, and a cover plate over the buffer layer, the organic light emitting diode display screen having a through hole through the substrate, the buffer layer, the display layer, the encapsulation layer, and the polarizing layer corresponding to the off-screen camera area, and the cover plate covering the through hole; wherein a part of the camera module extends into the through hole, and the top surface of the first optical element is supported and adhered to the bottom surface of the cover plate through the optical cement.
13. The underscreen camera assembly of claim 9, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements being mounted to an inner side surface of the lens barrel and the plurality of second optical elements being assembled together by the lens barrel; a top surface of the lens barrel having an exposed area not covered by the first optical element; wherein an area between the exposed area, the outer side surface of the first optical element, and the bottom surface of the substrate accommodates the optical glue that overflows.
14. The underscreen camera assembly of claim 10, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on an inner side surface of the lens barrel and the plurality of second optical elements are assembled together through the lens barrel; a top surface of the lens barrel having an exposed area not covered by the first optical element; wherein an area between the exposed area, the outer side surface of the first optical element, the first bottom surface, and the bottom surface of the substrate accommodates the optical glue that overflows.
15. The underscreen camera assembly of claim 9, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on an inner side surface of the lens barrel and the plurality of second optical elements are assembled together through the lens barrel; the top surface of the lens barrel includes an inner region and an outer region lower than the inner region to form an annular step, and the bottom surface of the first optical element is adhered to the inner region; wherein a region between the outer region, the side surface of the annular step, and the bottom surface of the substrate accommodates the optical cement that overflows.
16. The underscreen camera assembly of claim 10, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on an inner side surface of the lens barrel and the plurality of second optical elements are assembled together through the lens barrel; the top surface of the lens barrel includes an inner region and an outer region lower than the inner region to form an annular step, and the bottom surface of the first optical element is adhered to the inner region; wherein a region between the outer region, the side surface of the annular step, the first bottom surface, and the bottom surface of the substrate accommodates the optical cement that overflows.
17. The underscreen camera assembly of claim 9, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on an inner side surface of the lens barrel and the plurality of second optical elements are assembled together through the lens barrel; the middle area of the top surface of the lens barrel extends upwards to form an annular extension part, the first optical element is installed on the inner side of the annular extension part, the annular extension part divides the top surface of the lens barrel into an inner area located on the inner side of the annular extension part and an outer area located on the outer side of the annular extension part, and the outer area is lower than the inner area; wherein a region between the outer region, an outer side surface of the annular extension portion, and a bottom surface of the base plate accommodates the optical cement that overflows.
18. The underscreen camera assembly of claim 10, wherein the camera module further comprises an integrally formed lens barrel, the plurality of second optical elements are mounted on an inner side surface of the lens barrel and the plurality of second optical elements are assembled together through the lens barrel; the middle area of the top surface of the lens barrel extends upwards to form an annular extension part, the first optical element is installed on the inner side of the annular extension part, the annular extension part divides the top surface of the lens barrel into an inner area located on the inner side of the annular extension part and an outer area located on the outer side of the annular extension part, and the outer area is lower than the inner area; wherein a region between the outer region, the outer side surface of the annular extension, the first bottom surface, and the bottom surface of the substrate accommodates the optical cement that overflows.
19. The assembly of claim 18, wherein the barrel is bonded to the oled display by a second glue disposed in at least two of a gap between the outer region and the bottom surface of the substrate, a gap between the outer region and the first bottom surface, and a gap between a top surface of the annular extension and the first bottom surface.
20. An under-screen camera assembly, comprising:
the camera module of any one of claims 1-7; and
the display area of the liquid crystal display screen comprises an under-screen camera shooting area and a non-under-screen camera shooting area, the optical axis of the camera shooting module is perpendicular to the surface of the liquid crystal display screen, and the camera shooting module is positioned at the rear end of the under-screen camera shooting area;
the lower camera shooting area of the screen is formed by a through hole, the liquid crystal display screen is provided with a cover plate, the through hole is covered by the cover plate, one part of the camera shooting module extends into the through hole, and the top surface of the first optical element leans against and is pasted on the bottom surface of the cover plate through optical cement.
21. An electronic device, comprising: the camera module of any of claims 8-20, wherein the camera module is configured as a front camera module of the electronic device, and the oled display is configured as a display panel on a front surface of the electronic device.
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| CN201910891101.5A CN112543262B (en) | 2019-09-20 | 2019-09-20 | Camera module, under-screen camera assembly and corresponding electronic equipment |
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| CN201910891101.5A CN112543262B (en) | 2019-09-20 | 2019-09-20 | Camera module, under-screen camera assembly and corresponding electronic equipment |
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| CN208432778U (en) * | 2018-05-29 | 2019-01-25 | 宁波舜宇光电信息有限公司 | Optical lens and camera module |
| CN208739213U (en) * | 2018-06-21 | 2019-04-12 | 宁波舜宇光电信息有限公司 | Photosensory assembly, camera module and intelligent terminal |
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| CN205404935U (en) * | 2016-03-12 | 2016-07-27 | 中山联合光电科技股份有限公司 | Glass spheric glass is plane with separator and holds camera lens that leans on |
| CN109376570A (en) * | 2018-07-09 | 2019-02-22 | 东莞市美光达光学科技有限公司 | It is a kind of for shielding the miniature light filling lighting system of lower fingerprint recognition mould group |
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