CN110650276A

CN110650276A - Optical module and electronic equipment

Info

Publication number: CN110650276A
Application number: CN201910942255.2A
Authority: CN
Inventors: 张涛; 易永念
Original assignee: Vivo Mobile Communication Co Ltd
Current assignee: Vivo Mobile Communication Co Ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-01-03
Also published as: WO2021063148A1

Abstract

The invention discloses an optical module, which comprises a substrate (100), a lens support (200), a lens group (300) and a photosensitive chip (400), wherein the lens support (200) is arranged on the substrate (100), the photosensitive chip (400) is arranged on the substrate (100) and is positioned in an area surrounded by the lens support (200), the lens group (300) is arranged on the lens support (200) and is opposite to the photosensitive chip (400), the lens group (300) comprises at least one lens (310), and the surface of the at least one lens (310) is provided with a filtering coating film (500). The scheme can solve the problems that the process is complex, the assembly efficiency is low and the miniaturization design of the optical module is not facilitated in the assembly mode of the optical filter in the optical module of the conventional electronic equipment. The invention discloses an electronic device.

Description

Optical module and electronic equipment

Technical Field

The present invention relates to the field of communications devices, and in particular, to an optical module and an electronic device.

Background

Along with the promotion of user's demand, electronic equipment's function is more and more, and meanwhile, the optical module of electronic equipment configuration is also more and more, for example module, optics fingerprint identification module etc. of making a video recording. The optical performance of the optical module directly affects the overall performance of the electronic device.

In the present electronic device, the optical module is usually configured with an optical filter, which can filter out light that causes adverse interference to the light sensing of the optical module, for example, the optical filter is usually an infrared filter, which can filter out infrared light in ambient light, thereby avoiding the influence of infrared light sensing on the imaging process of the optical module.

The light filter covers on the sensitization face of the sensitization chip of optical module usually, also has some optical module certainly, and the light filter is installed on the inner wall of the lens support of optical module, no matter what position the setting can all carry out filtering in advance to the ambient light of projecting on the sensitization chip, reaches corresponding filtering effect. In the actual assembling process, the assembly of the optical filter needs an additional process, specifically, the optical filter needs to be attached to the photosensitive surface of the photosensitive chip by an optical adhesive, or the optical filter is fixed on the inner wall of the lens support by a special welding process or an adhesion process. Obviously, in the assembly process of the optical module at present, the optical filter requires a special process or material for assembly, which undoubtedly results in a complex assembly process and also results in a low overall assembly efficiency of the optical module. Of course, the assembly method of the filter is not favorable for the miniaturization design of the optical module.

Disclosure of Invention

The invention discloses an optical module and electronic equipment, which are used for solving the problems that the process is complex, the assembly efficiency is low and the miniaturization design of the optical module is not facilitated in the conventional assembly mode of an optical filter in the optical module of the electronic equipment.

In order to solve the problems, the invention adopts the following technical scheme:

the utility model provides an optical module, includes base plate, lens support, lens group and sensitization chip, wherein, the lens support sets up on the base plate, sensitization chip sets up on the base plate, and be located in the region that the lens support centers on, the lens group install on the lens support, and with sensitization chip sets up relatively, the lens group includes at least one lens, at least one the surface of lens is provided with the light filtering coating film.

An electronic device comprising the optical module of any of the above.

The technical scheme adopted by the invention can achieve the following beneficial effects:

the optical module disclosed by the embodiment of the invention improves the structure of the existing optical module, and the surface of at least one lens is provided with the light filtering coating film, so that the light filtering structure is directly formed on the lens in a coating film mode, and then the lens group is arranged on the lens bracket.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is an exploded view of an optical module according to an embodiment of the present invention;

FIG. 2 is a schematic view of an assembly structure of an optical module according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of a light-shielding sheet according to an embodiment of the present invention;

fig. 4 is a schematic view of an assembly structure of a lens and a filter coating film according to an embodiment of the invention.

Description of reference numerals:

100-substrate, 110-flexible circuit board, 120-reinforcing plate,

200-a lens support, 210-a fixing part, 220-a limiting part,

300-lens group, 310-lens,

400-photosensitive chip,

500-filtering coating, 510-first coating sub-layer, 520-second coating sub-layer,

600-light-isolating sheet, 610-light-passing hole.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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 invention.

The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

Referring to fig. 1-4, an embodiment of the invention discloses an optical module, which can be applied to an electronic device. The disclosed optical module can be a camera module, an optical fingerprint module, an environmental photosensitive module and the like, and the embodiment of the invention does not limit the specific types of the optical module.

The disclosed optical module includes a substrate 100, a lens holder 200, a lens set 300 and a photosensitive chip 400.

The substrate 100 is a base member of the optical module, and the substrate 100 directly or indirectly provides a mounting base for other constituent members of the optical module. In a preferable embodiment, the substrate 100 may include a circuit board, and on the premise that the substrate 100 is the circuit board, the substrate 100 not only can provide a mounting position for the photosensitive chip 400, but also can supply power to the photosensitive chip 400 and achieve communication and electrical connection between the photosensitive chip 400 and other functional devices besides the optical module.

Referring to fig. 1 again, for convenience of connection, the substrate 100 may include a flexible circuit board 110, the flexible circuit board 110 may lead out a longer wiring portion, and adapt to an internal environment of a more complex electronic device through deformation of the flexible circuit board 110, but the strength of the flexible circuit board 110 is weaker and may affect the stability of the mounting of the photosensitive chip 400, based on which, in a more preferred scheme, the substrate 100 may further include a reinforcing plate 120, and the reinforcing plate 120 is stacked on a side of the flexible circuit board 110 away from the photosensitive chip 400. Specifically, the reinforcing plate 120 may be a reinforcing steel plate, and in this case, the reinforcing plate 120 not only has better strength, but also has good heat dissipation performance.

The lens holder 200 is disposed on the substrate 100, and typically, the lens holder 200 is fixed on the substrate 100 by adhesion, and the lens holder 200 can provide a base for mounting the lens set 300. The photosensitive chip 400 is disposed on the substrate 100, and the photosensitive chip 400 is located in an area surrounded by the lens holder 200. Under this kind of condition, lens support 200 can also protect sensitization chip 400, plays the effect of sheltering from simultaneously, and lens support 200 has into the unthreaded hole, and lens support 200 can make the ambient light who sees through into the unthreaded hole induced by sensitization chip 400, and lens support 200 sets up around sensitization chip 400 simultaneously, can prevent that the stray light of other directions from projecting the light interference that sensitization chip 400 caused.

In a general case, the photosensitive chip 400 may be fixed on the substrate 100 by means of adhesion. In order to improve the stability of the mounting, the photosensitive chip 400 is attached on the substrate 100. On the premise that the substrate 100 includes a circuit board, the light sensing chip 400 may be electrically connected to the substrate 100 through a conductive adhesive layer, and of course, the light sensing chip 400 may also be electrically connected to the substrate 100 through a metal wire.

The lens group 300 is mounted on the lens support 200, ambient light passing through the light inlet of the lens support 200 can be sensed by the light sensing chip 400 after passing through the lens group 300, and the lens group 300 can play a role in light distribution. In the embodiment of the present invention, the lens set 300 includes at least two lens pieces 310 stacked in sequence, and specifically, the lens pieces 310 are sequentially disposed in a light entering direction of the light entering hole.

In the embodiment of the invention, the lens set 300 includes at least one lens 310, the surface of the at least one lens 310 is provided with a filter coating 500, and the filter coating 500 is a component capable of filtering light and is formed on the surface of the lens 310 by a coating method. The filter coating 500 is disposed opposite to the photosensitive chip 400, so that ambient light entering the photosensitive chip 400 can be filtered, and ambient light meeting requirements is finally sensed by the photosensitive chip 400.

The optical module disclosed by the embodiment of the invention improves the structure of the existing optical module, and the optical filtering coating film 500 is arranged on the surface of at least one lens 310, so that the optical filtering structure is directly formed on the lens 310 in a coating film mode, and then the lens group 300 is arranged on the lens support 200, therefore, on the premise of not influencing the optical filtering function, the optical filter does not need to be specially assembled in the process of assembling the optical module, and extra materials and fixing processes are not needed, so that the assembling efficiency of the optical filter can be improved, and the assembling process of the optical filter is simplified.

Meanwhile, the filter coating film 500 is directly formed on the lens 310, and further, the inner space of the lens holder 200 can be fully utilized, so that the overall volume of the whole optical module is not increased, and the miniaturization design of the optical module is facilitated.

In a more preferable scheme, the surface of at least two lenses 310 may be provided with the above-mentioned filter coating 500, so as to achieve the effect of multiple filtering, and achieve the purpose of improving the filtering effect.

In a specific implementation process, the plate surfaces on both sides of the lens 310 may be provided with the light filtering coating film 500, so as to achieve the purpose of multiple light filtering. Of course, the lens 310 may be provided with a piece of filter coating 500, and on the premise that the lens 310 is provided with a piece of filter coating 500, in a preferable scheme, the filter coating 500 may be provided on a surface of the lens 310 away from the photosensitive chip 400. In this case, a portion of the ambient light may be filtered by the filter coating 500 before entering the lens 310, so as to prevent the filtered ambient light from being reflected by the lens 310.

In an embodiment of the present invention, the structure of the optical filter coating 500 may be various, please refer to fig. 4, in a preferred embodiment, the optical filter coating 500 may include at least two coating sublayers sequentially stacked, in which, of the at least two coating sublayers, two adjacent coating sublayers may be a first coating sublayer 510 and a second coating sublayer 520, respectively, the first coating sublayer 510 is located between the second coating sublayer 520 and the lens 310, and the refractive index of the first coating sublayer 510 is greater than that of the second coating sublayer 520. Before the ambient light enters the lens 310, the ambient light may sequentially pass through the coating sub-layer 510 and the second coating sub-layer 520, so as to filter a portion of the ambient light step by step, and it is obvious that the filter coating 500 with such a structure can improve the filtering effect.

The first and

second coating sublayers

510 and 520 may be made of various materials capable of filtering light. In one embodiment, the first coating sublayer 510 can be a titanium dioxide layer,

the second plating sublayer 520 may be a silicon dioxide layer, and the specific materials of the first plating sublayer 510 and the second plating sublayer 520 are not limited in the embodiments of the present invention.

In order to improve the filtering effect, the filter coating 500 disclosed in the embodiment of the present invention may include 30 to 40 coating sublayers.

In a specific working process, the ambient light entering the light inlet does not pass through all regions of the filter coating 500, that is, a part of the regions of the filter coating 500 have no light transmission requirement, and all regions of the current optical filter are light transmission regions, in this case, reflection, diffuse reflection, etc. of ambient light by the non-light-transmitting regions may affect the working region of the filter coating film 500, and based on this, in a more preferable scheme, the optical module disclosed in the embodiment of the present invention may further include a light-blocking sheet 600, the light-blocking sheet 600 may be sandwiched between two adjacent lenses 310, the center of the light-blocking sheet 600 is provided with a light-passing hole 610, in a specific working process, the light blocking sheet 600 can shield the light filtering coating film 500 from a light transmission region, and ambient light passes through the light transmitting hole 610 and then passes through the light filtering effect of the light filtering coating film 500, and finally can be sensitized by the photosensitive chip 400.

In the above structure, the light-blocking sheet 600 is sandwiched between two adjacent lenses 310, and the light-blocking sheet 600 can be installed in the process of assembling the lens group 300, so that there is an advantage of convenient assembly.

In order to achieve a better light blocking effect, the optical module disclosed in the embodiment of the present invention may include at least two light-blocking sheets 600. Specifically, the light-shielding sheets 600 may be disposed between any two adjacent lenses 310, and the light-passing holes 610 of the light-shielding sheets 600 are disposed oppositely. In a specific embodiment, the number of the light-shielding sheets 600 may be two, and the number of the lenses 310 may be three, as shown in fig. 1.

In a more preferable embodiment, the light shielding sheet 600 may be a black light shielding sheet, so as to ensure the appearance performance of the whole optical module.

In the embodiment of the invention, the lens assembly 300 is mounted on the lens holder 200, so that the mounting of the filter coating 500 can be realized. The lens set 300 is generally secured to the lens holder 200, and the lens set 300 is secured to the lens holder 200 in a variety of ways. Referring to fig. 1 and 2 again, in a preferred embodiment, the inner wall of the lens holder 200 may be provided with a fixing portion 210, the edge of the light inlet of the lens holder 200 is provided with a limiting portion 220, the inner wall of the lens holder 200 may be provided with a fixing portion 210, and the lens assembly 300 is positioned between the limiting portion 220 and the fixing portion 210. The fixing portion 210 is typically a glue connection portion, which facilitates the quick assembly of the lens assembly 300. In the assembling process, an operator supports one side of the lens group 300 against the limiting portion 220, and fixes the other side of the lens group 300 on the inner wall of the lens support 200 through the fixing portion 210, so as to finally realize the installation of the lens group 300.

In order to better position the lens set 300, in a more preferred embodiment, the position-limiting portion 220 may be a position-limiting table surrounding the edge of the light inlet hole.

Based on the optical module disclosed by the embodiment of the invention, the embodiment of the invention discloses electronic equipment, and the disclosed electronic equipment comprises the optical module.

The electronic device disclosed by the embodiment of the invention can be a mobile phone, a tablet computer, an electronic book reader, a game machine, an intelligent watch and other devices, and the embodiment of the invention does not limit the specific types of the electronic devices.

In the above embodiments of the present invention, the difference between the embodiments is mainly described, and different optimization features between the embodiments can be combined to form a better embodiment as long as they are not contradictory, and further description is omitted here in view of brevity of the text.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides an optical module, its characterized in that, includes base plate (100), lens support (200), lens group (300) and sensitization chip (400), wherein, lens support (200) set up on base plate (100), sensitization chip (400) set up on base plate (100) and be located in the region that lens support (200) surround, lens group (300) are installed on lens support (200) and with sensitization chip (400) set up relatively, lens group (300) include at least one lens (310), at least one the surface of lens (310) is provided with light filtering coating film (500).

2. The optical module according to claim 1, wherein the surfaces of at least two of the lenses (310) are provided with the filter coating (500).

3. The optical module according to claim 1, wherein the filter coating (500) is disposed on a surface of the lens (310) facing away from the photo-sensitive chip (400).

4. The optical module according to claim 3, wherein the filter coating (500) comprises at least two coating sublayers stacked in sequence, wherein two adjacent coating sublayers are a first coating sublayer (510) and a second coating sublayer (520), respectively, and the first coating sublayer (510) is located between the second coating sublayer (520) and the lens (310), and the refractive index of the first coating sublayer (510) is greater than that of the second coating sublayer (520).

5. The optical module of claim 4, wherein the first coating sublayer (510) is a titanium dioxide layer and the second coating sublayer (520) is a silicon dioxide layer.

6. The optical module of claim 4, wherein the number of coating sublayers is 30-40.

7. The optical module according to claim 1, further comprising an optical isolation sheet (600), wherein the optical isolation sheet (600) is sandwiched between two adjacent lenses (310), and a light hole (610) is opened at the center of the optical isolation sheet (600).

8. The optical module according to claim 7, wherein the light-shielding sheets (600) are disposed between any two adjacent lenses (310), and the light-passing holes (610) of the light-shielding sheets (600) are disposed oppositely.

9. The optical module according to claim 8, wherein the number of said light-barriers (600) is two and the number of said lenses (310) is three.

10. The optical module according to claim 7, wherein the light-shielding sheet (600) is a black light-shielding sheet.

11. The optical module according to claim 1, wherein the inner wall of the lens holder (200) is provided with a fixing portion (210), the outer port of the light inlet of the lens holder (200) is provided with a limiting portion (220), and the lens assembly (300) is positioned between the limiting portion (220) and the fixing portion (210).

12. The optical module according to any of claims 1-11, wherein the optical module is a camera module, an optical fingerprint module, or an environmental light sensor module.

13. An electronic device comprising an optical module according to any one of claims 1-12.