CN115933280A

CN115933280A - Lens module and electronic equipment

Info

Publication number: CN115933280A
Application number: CN202211121640.9A
Authority: CN
Inventors: 齐永红
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2023-04-07
Also published as: WO2024055949A1

Abstract

The application discloses a lens module and electronic equipment, which belong to the technical field of communication equipment, wherein the lens module comprises a light source and a lens; the number of the lenses is multiple, the lenses are arranged at intervals, and part of the lenses are used for forming a camera module; at least one lens is arranged opposite to the light source to form a light supplement lamp; the lens is provided with a first side and a second side along the optical axis direction of the lens, and the light source and the imaging device of the camera module are both positioned on the first side; light rays emitted by the light source enter the at least one lens corresponding to the light source from the first side and then are emitted from the second side. According to the scheme, the light supplement lamp of the electronic equipment and the camera module can be realized, and the effect of consistency is achieved.

Description

Lens module and electronic equipment

Technical Field

The application belongs to the technical field of communication equipment, and particularly relates to a lens module and electronic equipment.

Background

With the continuous improvement of the image function of electronic equipment such as mobile phones, the requirement for taking pictures by the electronic equipment is more and more large, and the shooting scenes are infinite. For scenes such as dark light environment and night scene shooting, clear pictures are difficult to shoot, and good experience is difficult to achieve in video or live scenes. Therefore, part of the electronic equipment can be provided with a light supplement lamp for supplementing light so as to ensure that a good imaging effect can be achieved under dark light and night scenes.

In the related art, as shown in fig. 1, the light supplement lamp 500 adopts a fresnel lens and a light reflecting bowl design structure, so that the appearance of the opening of the light supplement lamp is more obtrusive than the appearance of the opening of the camera module 600, and thus the appearance consistency of the electronic device is poor.

Disclosure of Invention

The purpose of the embodiment of the application is to provide a lens module and electronic equipment, can realize that the outward appearance of light filling lamp and camera module of electronic equipment reaches the effect of uniformity.

In order to solve the technical problem, the present application is implemented as follows:

the embodiment of the application provides a lens module, include:

a light source;

the number of the lenses is multiple, the lenses are arranged at intervals, and part of the lenses are used for forming a camera module; at least one lens is arranged opposite to the light source to form a light supplement lamp; the lens is provided with a first side and a second side along the optical axis direction of the lens, and the light source and the imaging device of the camera module are both positioned on the first side; the light emitted by the light source enters the at least one lens corresponding to the light source from the first side and then is emitted from the second side.

The embodiment of the application provides electronic equipment, which comprises the lens module.

In the embodiment of the present application, at least one lens is disposed opposite to the light source to form a fill-in light. The light source is positioned on the first side of the lens, and light rays emitted by the light source enter the lens from the first side and then are emitted from the second side. In this scheme, with the structural style that the light filling lamp design adds the camera lens for the light source, can let the light filling lamp demonstrate the outward appearance of camera module, consequently when putting light filling lamp and camera module together and carrying out the outward appearance and pile up the design, can promote electronic equipment's outward appearance uniformity and harmony.

Drawings

Fig. 1 is a schematic diagram illustrating a stacked arrangement of a fill-in light and a camera module in the related art;

fig. 2 is a schematic diagram illustrating a stacked arrangement of a fill-in light and a camera module in an electronic device disclosed in an embodiment of the present application;

fig. 3 is a schematic structural view of a fill-in light in a lens module according to an embodiment of the disclosure;

fig. 4 is a schematic light path diagram of a fill-in light in the lens module disclosed in the embodiment of the present application;

fig. 5 is a configuration diagram of lenses and light sources of a fill-in light in a lens module disclosed in an embodiment of the present application.

Description of reference numerals:

100-light source, 200-lens, 210-lens barrel, 220-lens group, 221-first lens, 222-first lens, 223-third lens, 2231-first arc surface, 2232-second arc surface, 230-diaphragm, 240-fixing ring, 250-circuit board, 260-accommodating space, 300-camera module and 400-light supplement lamp.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are capable of operation in sequences other than those illustrated or described herein. In addition, "and/or" in the specification and claims means at least one of connected objects, a character "/" generally means that a preceding and succeeding related objects are in an "or" relationship.

The lens module and the electronic device provided in the embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Referring to fig. 2 to 5, an embodiment of the present application discloses a lens module, which is applied to an electronic device. The disclosed lens module includes a light source 100 and a lens 200.

The number of the lenses 200 is plural, and the lenses 200 are disposed at intervals, wherein some of the lenses 200 are used to form the camera module 300. The camera module 300 is used to implement a shooting function of the electronic device. Here, the lens 200 used to form the camera module 300 may be used as a first lens, the first lens is disposed opposite to the light sensing chip, and ambient light is incident into the light sensing chip through the first lens, so as to achieve a shooting function. The photosensitive chip and its imaging principle are well known technologies, and are not limited herein.

The lens 200 has a first side and a second side along the optical axis direction of the lens 200, and the imaging device of the camera module is located at the first side. The imaging device herein includes the photosensitive chip described above. The direction from the second side to the first side may be an incident direction of the ambient light, and it is understood that the ambient light enters the lens 200 from the second side, and then exits the lens 200 from the first side to be incident on the photosensitive chip. The lens 200 in the camera module 300 is the incident direction of the ambient light.

At least one lens 200 is disposed opposite to the light source 100 to form a fill-in light 400. The lens 200 constituting the fill light 400 may be referred to as a second lens here. The light supplement lamp 400 can be used for lighting, or when the user shoots under a darker environment, the light supplement lamp 400 can supplement light to a shooting scene. The light source 100 is located at the first side, and light emitted from the light source 100 enters the corresponding at least one lens 200 from the first side and then exits from the second side. The light transmission direction of the light filling lamp 400 is opposite to the transmission direction of the ambient light. The light of the fill-in light 400 is emitted from the electronic device to the environment through the second lens, and the ambient light in the camera module 300 is emitted into the electronic device through the first lens and received by the light sensing chip.

Alternatively, the Light source 100 of the fill-in lamp 400 may be an LED (Light Emitting Diode) lamp, a high-pressure sodium lamp, a metal halide lamp, or the like, although the Light source 100 of the fill-in lamp may also have other structures and is not limited herein.

In the embodiment disclosed in the present application, design light filling lamp 400 as light source 100 and the structural style of camera lens 200, can let light filling lamp 400 demonstrate the outward appearance of camera module 300, consequently when putting light filling lamp 400 and camera module 300 together and carrying out the outward appearance and pile up the design, can promote electronic equipment's outward appearance uniformity. In addition, light filling lamp 400 in this scheme is put together with camera module 300 and is carried out the outward appearance and pile up when designing for camera module 300 and light filling lamp 400 perfect integration, and then improved electronic equipment's harmony.

In the related art, the light supplement lamp 500 is provided with a design structure of a fresnel lens and a light reflecting bowl, and the fresnel lens and the light reflecting bowl are generally in a high-brightness tone so as to reflect light emitted by the light supplement lamp 500, thereby improving the brightness of the light supplement lamp 500. Therefore, the fill light 500 in the related art is usually yellowish white in appearance. The color deviation between the lens and the lens of the camera module 600 is large. In the solution disclosed in the present application, the structural form of the light source 100 and the lens 200 is adopted, so that the color of the lens 200 of the camera module 300 is consistent with the color of the lens 200 of the fill-in light 400, and thus the appearance consistency and harmony of the electronic device are further improved.

In addition, the light supplement lamp 500 in the related art is provided with a fresnel lens or a light reflecting bowl, and part of light emitted by the light source is reflected by the fresnel lens or the light reflecting bowl and then emitted. The light irradiated by the fill-in lamp 500 in the related art is scattered, and thus, the luminance is poor. In the embodiment disclosed in the present application, the light emitted by the light source 100 is collected through the lens 200, so that the light emitted by the light source 100 is collected, and thus the luminance of the light supplement lamp 400 is high in the present application.

Optionally, the lens 200 may include a lens barrel 210 and a lens group 220, the lens group 220 is located in the lens barrel 210, the lens group 220 includes a plurality of lenses spaced along an axial direction of the lens barrel 210, and the light source 100 is disposed opposite to the lens group 220. The lenses of the lens group 220 may be convex lenses, concave lenses, or a combination of convex and concave lenses.

In the above embodiments, the appearance color of the lens 200 of the fill light 400 may be the same as the appearance color of the lens 200 of the camera module 300 in the electronic device. Specifically, the lens 200 of the fill light 400 may have a black appearance. For example, the lens barrel 210 is a black injection molded part, or a metal part may be subjected to surface blackening treatment, but other internal structure appearance colors may be black.

In order to make the range of the angles of the light rays projected by the light source 100 cover the range of the field of view of the lens 200, in another alternative embodiment, the light emitting surface of the light source 100 coincides with the focal plane of the lens 200 constituting the fill-in lamp 400. The focal plane of the lens 200 is a plane perpendicular to the optical axis of the lens 200 and including a focal point, and as can be seen from the projection principle, the focal point is a point formed by converging light rays, and a clear image can be formed at the focal point. In this scheme, the light emitting surface of the light source 100 is placed on the focal plane of the lens 200. According to the projection principle, the ambient light enters the lens 200 from the second side, and is collected at the focal point of the focal plane of the lens 200 after passing through the lens group 220, and the light collected at the focal point can cover the field range of the entire lens 200. Similarly, the light emitting surface of the light source 100 coincides with the focal plane of the lens 200. At this time, the light source 100 projects light outward from the focal plane of the lens 200, so that the light emitted from the light source 100 can cover the entire field range of the lens 200, thereby further improving the optical performance of the fill-in light 400.

In the above embodiment, the lens 200 should collect the forward emitted light as much as possible, and if the collected light distribution angles are different from each other, the luminance and color deviation of the fill-in light 400 are larger. Based on this, in another alternative embodiment, the chief ray angle of the lens 200 constituting the fill-in lamp 400 may be less than 8 °. The chief ray angle is the angle between the chief ray and the normal, and the chief ray is the ray passing through the center of the lens 200, and can also be understood as the ray passing through the center of the diaphragm 230 of the lens 200. The chief ray can be irradiated on the above focal plane, the focal plane can be understood as an image plane and can also be understood as a light emitting surface of the light source 100, an included angle between a normal line of the light emitting surface (a line perpendicular to the light emitting surface is the normal line of the light emitting surface) and the chief ray is a Chief Ray Angle (CRA), the smaller the chief ray angle is, the better the light receiving effect of the lens 200 is, so that the more uniform the light emitting brightness and color of the light supplement lamp 400 is, and the better the optical performance is.

In another alternative embodiment, the lens 200 may further include an aperture 230, the aperture 230 is used for limiting the light flux of the lens 200, and the aperture 230 is disposed between any two lenses. The amount of light passing through the diaphragm 230 is generally expressed by F number, and the specific concept of F number is common knowledge and will not be described herein. The smaller the F number, the larger the diaphragm 230, and the larger the light flux amount of the lens 200; the larger the F number, the smaller the diaphragm 230, and the smaller the light flux amount of the lens 200. At this time, under the condition that other structural members are all used, the brightness of the fill-in light 400 can be changed by changing the size of the diaphragm 230, and meanwhile, the degree of ambient light entering the lens 200 can be regulated and controlled by changing the size of the diaphragm 230. Thus, the optical performance of the fill-in lamp 400 is better.

In the above embodiment, the smaller the F number, the larger the diaphragm 230, and the larger the light flux of the lens 200; the larger the F number, the smaller the diaphragm 230, and the smaller the light flux amount of the lens 200. However, the smaller F number means the larger the diaphragm 230, and the larger the diaphragm 230 means the larger the size of the through hole for passing light on the diaphragm 230, and the larger the size of the through hole, the user can see the internal components of the fill light 400, such as the light source 100, more easily through the through hole. Therefore, the smaller the F number is, the higher the energy of the light source 100 passing through the lens and the higher the brightness of the fill-in lamp are, but the leakage of the device is more likely to occur.

In another alternative embodiment, the F-number of diaphragm 230 is greater than 0.7. The F number of the diaphragm 230 is within this range, which can ensure that the devices of the fill-in light 400 are not easily exposed.

In the above embodiments, the lens assembly 220 has a larger number of lenses, which results in a decrease in the light transmittance of the lens assembly 200, and the lens assembly 220 has a smaller number of lenses, which results in a poor light-receiving effect of the lens assembly 200.

Based on this, in another alternative embodiment, the lens group 220 includes a first lens 221, a second lens 222 and a third lens 223, and the first lens 221, the second lens 222, the third lens 223 and the light source 100 are sequentially arranged at intervals. In this scheme, the number of the lens 200 is three, which can ensure that the lens 200 has a better light transmittance and the lens 200 has a better light-receiving efficiency.

In the above embodiments, the first lens 221, the second lens 222, and the third lens 223 may be manufactured by using an injection molding process, and the first lens 221, the second lens 222, and the third lens 223 may be manufactured by using the same optical material, for example, the first lens 221, the second lens 222, and the third lens 223 may be manufactured by using a material such as PMMA (Polymeric Methyl Methacrylate) or PC (Polycarbonate), or may be manufactured by using a different optical material, for example, a mixed material of PMMA and PC.

In order to improve the light transmittance of the lens assembly 200, in another alternative embodiment, each lens of the lens group 220 may be provided with an antireflection film. In this scheme, each lens may be subjected to antireflection coating treatment, so as to further improve the light transmittance of the lens 200, and further, the light emitting efficiency of the light supplement lamp 400 is not easily affected.

Optionally, the antireflection film may be made of magnesium fluoride, titanium oxide, lead sulfide, lead selenide, or other materials, and of course, other materials may also be used, which is not limited herein.

In another alternative embodiment, the first lens 221 may have a first optical power, the second lens 222 may have a second optical power, and the third lens 223 may have a third optical power, and the first optical power may be less than zero, when the first optical power is a negative value. The second focal power and the third focal power can both be greater than zero, and both the second focal power and the third focal power are positive values.

Optical power is the ability of an optical system to deflect light rays. The larger the value of the optical power, the more the parallel beam is bent, and the larger the refraction angle. When the focal power is positive, the refraction of the light rays is convergent. When the focal power is negative, the refraction of the light rays is divergent.

In this embodiment, since the light emitted from the light source 100 is scattered light, in order to prevent the light from being scattered, the powers of the second lens 222 and the third lens 223 close to the light source 100 may be positive values, thereby converging the light. The light passes through the first lens 221 and then exits the lens 200, so that the focal power of the first lens 221 can be a negative value, so that the light is diffused, and the illumination range of the fill-in light 400 is enlarged. This scheme can further improve the optical property of light filling lamp 400.

Alternatively, the first lens 221 may be a concave lens, and the second lens 222 and the third lens 223 may be both convex lenses.

In order to further improve the optical performance of the fill light 400, in another alternative embodiment, the ratio of the first focal power to the third focal power may be greater than-0.78 and less than-0.58. The ratio of the second optical power to the third optical power may be greater than 0.83 and less than 0.93. In this embodiment, if the ratio of the first focal power to the third focal power and the ratio of the second focal power to the third focal power are lower than the lower limit, the focal powers are insufficient, which makes it difficult to match the size of the light emitting surface of the light source 100 with the lens 200.

If the ratio of the first focal power to the third focal power and the ratio of the second focal power to the third focal power exceed the upper limit, the spherical aberration of the entire lens 200 is too large, which means that the degree of refraction and bending of the partial light at the edge of the lens 200 is much greater than the degree of bending of the light at the center of the lens, so that the energy utilization rate of the fill light is reduced.

Therefore, the ratio of the first focal power to the third focal power and the ratio of the second focal power to the third focal power within the above ranges can ensure that the focal power of the lens 200 is sufficient, so that the light emitting surface of the light source 100 and the lens 200 have better matching performance, and the light supplement lamp 400 has better energy utilization efficiency.

Since the third lens 223 is closer to the light source 100, the light transmittance of the third lens 223 is an important factor for determining the optical performance of the fill light 400. In order to further improve the light collecting performance of the third lens 223, in another alternative embodiment, the third lens 223 has a first arc surface 2231 and a second arc surface 2232, the first arc surface 2231 may be located on the side where the light source 100 is located, the second arc surface 2232 may be located on the side where the second lens 222 is located, and the convex directions of the first arc surface 2231 and the second arc surface 2232 may both face the second lens 222. At this time, the third lens 223 has a meniscus shape, and the surface of the third lens 223 is curved outward and concave toward the light source 100. Here, the outward curvature of the surface of the third lens 223 means a curvature toward the second side of the lens barrel 200. At this time, the light receiving performance of the third lens 223 is better, so that the energy utilization rate of the fill-in lamp 400 is further improved.

Further, the radius of the first curved surface 2231 is a first curvature value, the radius of the second curved surface 2232 is a second curvature value, and a ratio of the first curvature value to the second curvature value may be greater than 6.5 and less than 10.

In this embodiment, if the ratio of the first curvature value to the second curvature value is lower than the lower limit, the focal power of the third lens 223 is insufficient, so that the included angle between the light angle and the surface of the third lens 223 is too large, and the stray light is serious. If the ratio of the first curvature value to the second curvature value exceeds the upper limit, the second surface of the third lens 223 is too curved, which results in too much field curvature, too much difference between the defocus degrees of the center and the edge, and poor color uniformity of the projected light spot. Therefore, the third lens 223 has a good light-receiving performance in the above range of the ratio of the first curvature value to the second curvature value, and thus the light performance of the fill-in light 400 is good.

In another alternative embodiment, the lens 200 further includes a plurality of fixing rings 240, and each lens can be clamped and fixed by two adjacent fixing rings 240. In this scheme, each lens is held and fixed by the two connected fixing rings 240, and thus abrasion occurs between the adjacent two lenses, thereby improving safety and reliability of the lens barrel 200.

In the above embodiments, the light source 100 may be disposed outside the lens barrel 210, and at this time, the light is easily scattered outside the lens barrel 200, thereby causing light leakage. In another alternative embodiment, the lens module may further include a circuit board 250, the circuit board 250 may cover one end of the lens barrel 210, the circuit board 250 and the lens barrel 210 enclose an accommodating space 260, the light source 100 is electrically connected to the circuit board 250, and the light source 100 may be located in the accommodating space 260. In this scheme, the light source 100 is located in the accommodating space 260, and the circuit board 250 covers one end of the lens barrel 210, so that the light leakage phenomenon is not easy to occur in the light supplement lamp 400, and the optical performance of the light supplement lamp 400 is further improved.

In addition, the light source 100 may be located in the accommodating space 260, and the light source 100 is not easily interfered or collided with other components of the electronic device, so that the safety and reliability of the fill-in light 400 are further improved.

Alternatively, the circuit board 250 may be a printed circuit board, or the circuit board 250 may be a rigid-flex board, or the circuit board 250 may include a flexible circuit board and a stiffener that are attached together.

In another alternative embodiment, the photosensitive chip of the camera module 300 may also be electrically connected to the circuit board 250, so that the integration level of the circuit board 250 can be improved, and the structure of the electronic device can be simplified.

In another alternative embodiment, the lens assembly 200 may further include a driving mechanism, and the driving mechanism may be connected to the lens group 220, and the driving mechanism is configured to drive the lens group 220 to move along the axial direction of the lens barrel 210. In this scheme, the lens group 220 is driven to move, so that the distance between the light source 100 and the lens group 220 is increased or decreased, and the brightness of the light supplement lamp 400 is adjusted, thereby increasing the application scene of the light supplement lamp 400.

Based on the lens module disclosed by the embodiment of the application, the embodiment of the application further discloses an electronic device, and the disclosed electronic device comprises the lens module disclosed by any one of the embodiments.

The outward appearance of light filling lamp 500 among the correlation technique and the outward appearance difference of camera module 600 are very big, therefore both hardly do the design in step together and pile up, in the embodiment disclosed in this application, the appearance structure of light filling lamp 400 is unanimous with the appearance structure of camera module 300, consequently light filling lamp 400 can do together with camera module 300 and pile up arranging for camera module 300 and light filling lamp 400 perfect fusion, thereby make the harmony of electronic equipment's whole outward appearance better.

The electronic device disclosed in the embodiment of the present application may be a smart phone, a tablet computer, an electronic book reader, a wearable device (e.g., a smart watch), an electronic game machine, and the like, and the specific kind of the electronic device is not limited in the embodiment of the present application.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A lens module, comprising:

a light source;

the number of the lenses is multiple, the lenses are arranged at intervals, and part of the lenses are used for forming a camera module; at least one lens is arranged opposite to the light source to form a light supplement lamp; the lens is provided with a first side and a second side along the optical axis direction of the lens, and the light source and the imaging device of the camera module are both positioned on the first side; light rays emitted by the light source enter the at least one lens corresponding to the light source from the first side and then are emitted from the second side.

2. The lens module as recited in claim 1, wherein the lens comprises a lens barrel, a lens group and a stop, the lens group is disposed in the lens barrel, the lens group comprises a plurality of lenses spaced along an axis of the lens barrel, the light source is disposed opposite to the lens group, and the stop is disposed between any two of the lenses.

3. The lens module as claimed in claim 2, wherein the F-number of the diaphragm is greater than 0.7.

4. The lens module as recited in claim 2, wherein the lens group includes a first lens element, a second lens element and a third lens element, the first lens element, the second lens element, the third lens element and the light source being sequentially spaced apart.

5. The lens module as recited in claim 4, wherein the first lens has a first optical power, the second lens has a second optical power, and the third lens has a third optical power, the first optical power being less than zero, and the second optical power and the third optical power being greater than zero.

6. The lens module as claimed in claim 5, wherein the ratio of the first optical power to the third optical power is greater than-0.78 and less than-0.58; the ratio of the second focal power to the third focal power is greater than 0.83 and less than 0.93.

7. The lens module as recited in claim 6, wherein the third lens element has a first arc surface and a second arc surface, the first arc surface is located on a side where the light source is located, the second arc surface is located on a side where the second lens element is located, the protruding directions of the first arc surface and the second arc surface are both facing the second lens element, the radius of the first arc surface is a first curvature value, the radius of the second arc surface is a second curvature value, and the ratio of the first curvature value to the second curvature value is greater than 6.5 and less than 10.

8. The lens module as recited in claim 2, wherein each of the lenses of the set is provided with an antireflection film.

9. The lens module as claimed in claim 2, wherein the lens further comprises a plurality of fixing rings, and each lens is clamped and fixed by two adjacent fixing rings.

10. The lens module as claimed in claim 2, further comprising a circuit board, wherein the circuit board covers one end of the lens barrel, the circuit board and the lens barrel enclose an accommodating space, the light source is electrically connected to the circuit board, and the light source is located in the accommodating space.

11. The lens module as claimed in claim 1, wherein a light-emitting surface of the light source coincides with a focal plane of the lens constituting the fill-in light.

12. The lens module as claimed in claim 1, wherein a chief ray angle of the lens constituting the fill light is less than 8 °.

13. An electronic device comprising the lens module according to any one of claims 1 to 12.