CN112449094B

CN112449094B - Light filter, camera module, protection apron and electronic equipment

Info

Publication number: CN112449094B
Application number: CN202011248727.3A
Authority: CN
Inventors: 谭耀成; 韦怡; 张海裕
Original assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Current assignee: Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date: 2020-11-10
Filing date: 2020-11-10
Publication date: 2022-09-09
Anticipated expiration: 2040-11-10
Also published as: WO2022100297A1; CN115348376A; CN112449094A

Abstract

The application relates to an optical filter, a camera module, a protective cover plate and electronic equipment, wherein the optical filter comprises blue glass and an antireflection film, the transmittance of the blue glass to light with the wavelength within the range of 700-1100 nanometers is less than 5%, and the blue glass is provided with a first surface and a second surface which are arranged in a back-to-back manner. The antireflective coating covers at least one of the first surface and the second surface. When the optical filter is applied to a camera module, the transmittance of the blue glass to light with the wavelength within the range of 700-1100 nm is less than 5%, so that the high cut-off of near infrared light is realized, and the reflection reducing film arranged on at least one of the first surface and the second surface can reduce the reflection of the light, so that the problem of glare or ghost caused by reflected light between the optical filter and an image sensor can be effectively prevented, and the shooting quality is improved.

Description

Light filter, camera module, protective cover plate and electronic equipment

Technical Field

The application relates to the technical field of camera shooting, in particular to an optical filter, a camera module, a protective cover plate and electronic equipment.

Background

The camera module of mobile terminals such as cell-phone, panel computer generally includes infrared filter, and infrared filter can filter the infrared light of incidenting to camera module inside to promote camera module's image quality. However, the reflected light between the infrared filter and the image sensor of the camera module is easy to cause glare or ghost.

Disclosure of Invention

The embodiment of the application discloses an optical filter in a first aspect, which can be applied to a camera module to prevent glare or ghost problems caused by reflected light between the optical filter and an image sensor.

An optical filter, comprising:

the light source comprises blue glass, wherein the transmittance of the blue glass to light with the wavelength within the range of 700-1100 nanometers is less than 5%, and the blue glass is provided with a first surface and a second surface which are arranged oppositely; and

an antireflective film covering at least one of the first surface and the second surface.

When the optical filter is applied to a camera module, the transmittance of the blue glass to light with the wavelength within the range of 700-1100 nm is less than 5%, so that the high cut-off of near infrared light is realized, and the antireflection film arranged on at least one of the first surface and the second surface can reduce the reflection of the light, thereby effectively preventing the glare or ghost problem caused by reflected light between the optical filter and the image sensor and improving the shooting quality.

In one embodiment, the antireflection film covers the first surface and the second surface, and at least one of the first surface and the second surface is provided with a near-infrared absorption pigment layer which is arranged between the antireflection film and the blue glass.

In one embodiment, the near-infrared absorbing pigment layer is spin coated on the blue glass.

In one embodiment, at least one of the near-infrared absorbing pigment layer and the blue glass includes an ultraviolet light absorbing material to cut off ultraviolet light having a wavelength in a range of 350 nanometers to 380 nanometers.

In one embodiment, the electronic device includes a protective cover plate covering the lens, the protective cover plate including a transparent substrate and another antireflection film provided on at least one of an inner surface and an outer surface of the transparent substrate.

The second aspect of the embodiment of the present application discloses a camera module, so as to prevent the glare or ghost problem caused by the reflected light between the optical filter and the image sensor.

A camera module comprises a lens, an image sensor and the optical filter, wherein the lens and the optical filter are arranged on the light incident side of the image sensor.

In one embodiment, the optical filter is disposed between the lens and the image sensor.

In one embodiment, the filter is attached to the image sensor.

In one embodiment, the lens is disposed between the filter and the image sensor.

A third aspect of the embodiments of the present application discloses an electronic device to prevent glare or ghost caused by reflected light between an optical filter and an image sensor.

An electronic device comprises a body and the camera module, wherein the camera module is connected to the body.

In one embodiment, the electronic device includes a protective cover plate covering the lens, the optical filter is located between the protective cover plate and the image sensor, the protective cover plate includes a transparent substrate and another antireflection film provided on at least one of an inner surface and an outer surface of the transparent substrate.

The fourth aspect of the embodiments of the present application discloses a protective cover plate, which can prevent glare or ghost image caused by reflected light between the optical filter of a camera module and an image sensor.

The utility model provides a protection apron, includes foretell light filter, the light filter is used for covering the camera module, just blue glass extends and covers display screen module or battery.

The fifth aspect of the embodiment of the application discloses a protective cover plate, which can prevent the glare or ghost problem caused by the reflected light between the optical filter of the camera module and the image sensor.

A protective cover plate comprises a transparent substrate and the optical filter, wherein the optical filter is connected to the transparent substrate and used for covering a camera module.

In one embodiment, the transparent substrate extends to cover the display screen module or the battery.

The sixth aspect of the embodiments of the present application discloses an electronic device to prevent glare or ghost problems caused by reflected light between an optical filter and an image sensor.

The utility model provides an electronic equipment, includes body, camera module and above the protection apron, the protection apron with the camera module all connect in the body.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a perspective of an electronic device according to an embodiment;

FIG. 2 is a schematic view of another perspective of an electronic device according to an embodiment;

fig. 3 is a schematic position diagram of a camera module and a protective cover plate according to an embodiment;

FIG. 4 is a graph of transmittance versus wavelength for an embodiment of an optical filter;

fig. 5 is a schematic position diagram of a camera module and a protective cover plate according to another embodiment;

FIG. 6 is a graph of transmittance versus wavelength for the filter of FIG. 5;

FIG. 7 is a graph of reflectance versus wavelength for the filter of FIG. 5;

fig. 8 is a schematic position diagram of a camera module and a protective cover plate according to yet another embodiment;

fig. 9 is a schematic position diagram of a camera module and a protective cover plate according to yet another embodiment;

fig. 10 is a schematic position diagram of a camera module and a protective cover plate according to yet another embodiment;

fig. 11 is a schematic position diagram of a camera module and a protective cover plate according to yet another embodiment;

fig. 12 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Reference numerals:

10. electronic device 11, main body 111, and middle frame

113. Display screen module 115, back lid 117, protection apron

1171. Transparent substrate 1173, another antireflection film 12, and camera module

121. Filter 1211, blue glass a1, first surface

a2, second surface 1213, antireflection film 1215, near infrared absorbing pigment layer

123. Lens 125 and image sensor

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are illustrated in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

As used herein, "terminal device" refers to a device capable of receiving and/or transmitting communication signals including, but not limited to, devices connected via any one or more of the following connections:

(1) via wireline connections, such as via Public Switched Telephone Network (PSTN), Digital Subscriber Line (DSL), Digital cable, direct cable connections;

(2) via a Wireless interface such as a cellular network, a Wireless Local Area Network (WLAN), a digital television network such as a DVB-H network, a satellite network, an AM-FM broadcast transmitter.

A terminal device arranged to communicate over a wireless interface may be referred to as a "mobile terminal". Examples of mobile terminals include, but are not limited to, the following electronic devices:

(1) a satellite phone or a cellular phone;

(2) personal Communications Systems (PCS) terminals that may combine cellular radiotelephones with data processing, facsimile, and data Communications capabilities;

(3) radiotelephones, pagers, internet/intranet access, Web browsers, notebooks, calendars, Personal Digital Assistants (PDAs) equipped with Global Positioning System (GPS) receivers;

(4) conventional laptop and/or palmtop receivers;

(5) conventional laptop and/or palmtop radiotelephone transceivers, and the like.

Referring to fig. 1 and 2, in one embodiment, the electronic device 10 is a smartphone. The electronic device 10 includes a body 11 and a camera module 12, and the camera module 12 is mounted on the body 11. The body 11 may include devices such as a middle frame 111, a display screen module 113, a rear cover 115, and a circuit board (not shown), the display screen module 113 and the rear cover 115 are disposed on opposite sides of the middle frame 111, and a mounting space may be formed between the rear cover 115 and the middle frame 111 for mounting the devices such as the circuit board, the battery, and the camera module 12. The battery is used for supplying power to the display module 113 and the circuit board, and the camera module 12 is connected to the circuit board. In some embodiments, the camera module 12 may be used to perform functions of a rear camera, for example, a user may perform operations such as close-up shooting, long-range shooting, or video recording through the camera module 12. In other embodiments, the camera module 12 can be used to perform the function of a front camera, that is, a user can take a self-timer, a video call, etc. through the camera module 12. In other embodiments, the electronic device 10 may be of the tablet, notebook, or the like type.

Referring to fig. 3, the present application discloses an optical filter 121, the optical filter 121 includes a blue glass 1211 and an anti-reflection film 1213, the transmittance of the blue glass 1211 for light having a wavelength in a range from 700 nm to 1100 nm is less than 5%, and the blue glass 1211 has a first surface a1 and a second surface a2 opposite to each other. The antireflection film 1213 covers at least one of the first surface a1 and the second surface a 2. In one embodiment, the first surface a1 is covered with the antireflection film 1213, and the second surface a2 is not covered with the antireflection film 1213. In another embodiment, the first surface a1 is not covered with the antireflection film 1213, and the second surface a2 is covered with the antireflection film 1213. In yet another embodiment, both the first surface a1 and the second surface a2 are covered with the antireflective film 1213. In the present embodiments, covering is to be understood as covering one object over another object, with or without other intermediate objects between the two objects.

In the embodiment disclosed in the present application, the blue glass 1211 satisfying the above conditions may be also referred to as a super blue glass 1211. Fig. 4 shows a graph of transmittance versus wavelength of the super blue glass 1211, and it can be seen from fig. 4 that the super blue glass 1211 has a transmittance of 0.5% or less for light in a near infrared band (750 nm to 1100 nm) and a high transmittance for a sensitive band (430 nm to 640 nm) of human eyes. In other words, the super blue glass 1211 has a very strong cut-off effect on light in the near infrared band. When the super blue glass 1211 is applied to the camera module 12, the near infrared band component in the ambient light passing through the super blue glass 1211 can be effectively filtered out, so as to prevent the light of the near infrared band from interfering with the visible light image and even causing the camera module 12 not to normally image. In the related art, when the conventional blue glass 1211 is used for imaging the camera module 12, since the transmittance of the conventional blue glass 1211 for light of a wavelength range from 700 nm to 1100 nm is greater than 10%, the conventional blue glass 1211 must be combined with an infrared cut-off film to effectively filter the light of a near-infrared wavelength band. The filter 121 disclosed in the present application can avoid plating an infrared cut-off film on the blue glass 1211 or other parts of the camera module 12, so that the processing cost can be saved.

With reference to fig. 3, in some embodiments, the camera module 12 includes a lens 123, an image sensor 125 and the filter 121, the lens 123 and the filter 121 are disposed on the light incident side of the image sensor 125, and ambient light can pass through the lens 123 and the filter 121 and enter the image sensor 125. The image sensor 125 can convert the optical signal into an electrical signal, and can form an image of the subject after further processing. Further, the camera module 12 includes a housing (not shown), and the lens 123, the filter 121, and the image sensor 125 are mounted on the housing, so that the lens 123, the filter 121, and the image sensor 125 are positioned by the housing. In embodiments where electronic device 10 is a smartphone, camera module 12 may be mounted to a circuit board through a housing and communicatively coupled to a processor on the circuit board.

Referring to fig. 5, in some embodiments, an optical filter 121 is disposed between a lens 123 and an image sensor 125. The first surface a1 and the second surface a2 of the filter 121 are both covered with the antireflection film 1213, and at least one of the first surface a1 and the second surface a2 is provided with a near-infrared absorbing pigment layer 1215, and the near-infrared absorbing pigment layer 1215 is provided between the antireflection film 1213 and the blue glass 1211. Specifically, in the present embodiment, the first surface a1 of the blue glass 1211 is closer to the image sensor 125 than the second surface a2, the first surface a1 is provided with the antireflection film 1213, the second surface a2 is provided with the near-infrared absorbing pigment layer 1215, and a side of the near-infrared absorbing pigment layer 1215 facing away from the blue glass 1211 is provided with the antireflection film 1213, that is, a side where the second surface a2 is located is covered with the antireflection film 1213. The near infrared absorbing pigment layer 1215 contains an organic pigment, and absorbs light in the near infrared band (750 nm to 1100 nm) to have an effect of suppressing near infrared light. Furthermore, ultraviolet light absorbing materials can be added into the near-infrared pigment layer to cut off ultraviolet light with the wavelength within the range of 350-380 nanometers. Because the ultraviolet light transmittance of the band is relatively high, after the near-infrared absorption pigment layer 1215 added with the ultraviolet light absorption material is adopted for filtering, the interference of the ultraviolet light of the band on the imaging of visible light can be avoided, so that an image closer to the perception of human eyes can be obtained, and a better imaging effect can be obtained.

Referring to fig. 6 and 7, fig. 6 shows a transmittance-wavelength curve of the optical filter 121 according to the present embodiment, and fig. 7 shows a reflectance-wavelength curve of the optical filter 121 according to the present embodiment. The position of the angle of incidence γ is shown in fig. 3.

As can be seen from fig. 6, the filter 121 disclosed in the present application has a good infrared cut filter effect. Specifically, the average transmittance of the optical filter 121 for visible light with a wavelength in the range of 435 to 565 nanometers reaches 93.5%, and the maximum transmittance reaches more than 95%, so that high transmittance of visible light is realized; the average transmittance of light with the wavelength of 700-1100 nm is less than 0.46%, so that the high cut-off of infrared light is realized; the average transmission rate variation of visible light with an incident angle of 0-45 degrees is below 2%, the angle consistency is good, and the normal imaging effect and the problem of no edge color difference are guaranteed.

In addition, in the related art, when the conventional filter solution of blue glass combined with an infrared cut film is adopted, a gap exists between the filter and the image sensor, and the gap distance is relatively short. The surface of the optical filter can generate a strong reflection effect on light, especially for light incident at a large angle, for example, light incident at 45 degrees, strong reflected light can appear in a visible light band, and the strong reflected light is superposed with the reflected light on the surface of the image sensor, so that the problem of obvious glare or ghost can be formed, and the imaging quality of the camera module is influenced. Especially, when a user takes a picture in the backlight, because the incident light is stronger, the phenomena of glare or ghost are more obvious. According to the scheme, the super blue glass 1211 is combined with the reflection reducing films 1213 arranged on the two sides, and the reflectivity of the reflection reducing films 1213 is far smaller than that of the infrared cut-off films, so that the problem of glare or ghost caused by the conventional optical filter 121 can be effectively solved, and the shooting quality of the camera module 12 is improved.

As can be seen from fig. 7, the average reflectance of the visible light with a wavelength ranging from 420 nm to 680 nm of the optical filter 121 disclosed in the present application is below 0.25%, and the highest reflectance is below 0.5% at an incident angle of 0 °. Even in the case of incidence at a large angle of 45 °, the average reflectance of visible light in this wavelength range is 1.0% or less, and the maximum reflectance does not exceed 1.5%, so that low reflectance of visible light in this wavelength range is achieved. In other words, the optical filter 121 disclosed in the present application can reduce the reflection of the visible light in the above-mentioned wavelength range, so as to prevent the multiple reflections of the visible light in the optical device from overlapping to cause glare or ghost.

Further, in this embodiment, the near-infrared absorbing pigment layer 1215 is formed on the second surface a2 of the blue glass 1211 by using a spin coating process, and the spin coating process can achieve uniform layer thickness of the near-infrared absorbing pigment layer 1215, so as to improve the optical characteristics of the near-infrared absorbing pigment layer 1215, improve the angle consistency while ensuring a normal imaging effect, and make the edge chromatic aberration of the imaging area extremely small, so as to reduce the color shift problem in the central area and the edge area. Of course, the antireflective film 1213 may be formed by a spin coating process to obtain better optical properties, which will not be described herein.

Referring to fig. 8, in other embodiments, the near infrared absorbing pigment layer 1215 may be spin-coated on the first surface a1, and both a side of the near infrared absorbing pigment layer 1215 facing away from the blue glass 1211 and the second surface a2 may be covered with the antireflection film 1213. The optical filter 121 of this embodiment can also obtain optical performance equivalent to that of the above-described optical filter 121. Since the near-infrared absorbing pigment layer 1215 is disposed between the antireflection film 1213 and the blue glass 1211, the antireflection film 1213 may completely cover the near-infrared absorbing pigment layer 1215, so that the antireflection film 1213 may be used as a protective film for the near-infrared absorbing pigment layer 1215 to prevent the near-infrared absorbing pigment layer 1215 from being affected by external moisture, and also to prevent the near-infrared absorbing pigment layer 1215 from being deteriorated by light, thereby prolonging the service life of the near-infrared absorbing pigment layer 1215. Of course, in other embodiments, the near infrared absorbing pigment layer 1215 may be absent.

Referring to fig. 9, in other embodiments, the filter 121 is attached to the light incident side of the image sensor 125. For example, the optical filter 121 may be bonded to the light incident side of the image sensor 125 by an OCA (optical Clear Adhesive) to reduce a gap between the surface of the optical filter 121 and the light incident surface of the image sensor 125, so as to reduce the overall thickness of the camera module 12, achieve a thin design of the camera module 12, and facilitate the light and thin design of the electronic device 10.

Referring to fig. 10, in another embodiment, the lens 123 is disposed between the filter 121 and the image sensor 125. In other words, in this embodiment, the filter 121 may be connected to the housing of the camera module 12 and located on a side of the lens 123 facing away from the image sensor 125, and the light filtered by the filter 121 may pass through the lens 123 and directly enter the image sensor 125, so as to avoid a glare or ghost problem caused by the reflected light between the surface of the image sensor 125 and the surface of the filter 121, and the surface of the filter 121 and the surface of the lens 123, and further improve the imaging quality of the camera module 12. Of course, in this embodiment, the optical filter 121 may no longer be a part of the camera module 12, and may be combined with other components of the electronic device 10, so as to further reduce the overall thickness of the camera module 12, to achieve a thin design of the camera module 12, and to facilitate a thin design of the electronic device 10.

With continued reference to fig. 10 and with reference to fig. 2, in some embodiments, the electronic device 10 includes a protective cover 117 covering the lens 123, and the optical filter 121 is located between the protective cover 117 and the image sensor 125, that is, the protective cover 117 is exposed to the body 11. The protective cover 117 includes a transparent substrate 1171 and another antireflection film 1173, the another antireflection film 1173 being disposed on at least one of an inner surface or an outer surface of the transparent substrate 1171. Specifically, the transparent substrate 1171 may be made of white glass, sapphire or plastic, and is used for protecting the lens 123 of the camera module 12. In some embodiments, the rear cover 115 of the electronic device 10 is opened with a through hole for transmitting light, and the camera module 12 and the protective cover 117 are disposed corresponding to the through hole. Ambient light may pass from the through-hole through the protective cover 117 and into the camera module 12. The function of the other antireflection film 1173 is similar to that of the antireflection film 1213 in the above-described embodiment, i.e., the reflection of the incident light ray is attenuated by the principle of coherence of the light ray, so as to reduce the reflection of the light ray, and reduce the ghost or glare problem. It is understood that the other antireflective film 1173 of the protective cover 117 can be absent.

In other embodiments, the transparent substrate 1171 is part of the back cover 115. For example, in the embodiment where the rear cover 115 is made of glass, a part of the inner surface of the rear cover 115 may not be covered with the decoration layer, and the part of the rear cover 115 not covered with the decoration layer may be disposed corresponding to the camera module 12, so that the ambient light can penetrate through the rear cover 115 and enter the camera module 12. In such an embodiment, transparent substrate 1171 may extend and form a back cover 115 for covering the cells. In this embodiment, since the surface area of the transparent substrate 1171 is relatively large, the processing of the other antireflection film 1173 is more facilitated, so as to improve the processing efficiency of the other antireflection film 1173.

In other embodiments, the transparent substrate 1171 can be part of a cover panel of the display module 113. For example, the transparent substrate 1171 may extend to form a screen cover for covering the display screen module 113, and the other antireflection film 1173 is disposed corresponding to the lens 123 of the camera module 12, so that the ambient light can pass through the protective cover 117 and be incident into the camera module 12. In this embodiment, since the surface area of the transparent substrate 1171 is relatively large, the processing of the other antireflection film 1173 is more facilitated, so as to improve the processing efficiency of the other antireflection film 1173.

The thickness of the other reduced reflection film 1173 can be between 0.1 micron and 0.2 micron, for example, the thickness of the other reduced reflection film 1173 can be 0.13 millimeters, or 0.15 millimeters, or 0.18 millimeters, and the like. In some embodiments, another anti-reflective film 1173 can also be formed on at least one of the inner surface and the outer surface of the transparent substrate 1171 using a spin coating process. For example, the other antireflection film 1173 may be spin-coated on the inner surface of the transparent substrate 1171, or may be spin-coated on the outer surface of the transparent substrate 1171, or both the inner and outer surfaces of the transparent substrate 1171 may be spin-coated with the other antireflection film 1173. In some embodiments, another anti-reflection film 1173 may also be used to cut off uv light, for example, another anti-reflection film 1173 may be added with a material that absorbs uv light to absorb uv light in the 350 nm to 380 nm wavelength band, where transmittance is relatively high in the uv wavelength band.

In the embodiment of the camera module 12 with the default filter 121, the filter 121 may be connected to the protective cover 117 to filter incident light of the camera module 12. For example, in some embodiments, the optical filter 121 may be connected to the protective cover 117 by using OCA glue and correspondingly cover the camera module 12. In this embodiment, the filter 121 may be manufactured as a general-purpose device and then assembled to the protective cover 117, which may improve the general-purpose property of the filter 121 and the assembly efficiency. Since the camera module 12 has the default filter 121, it can have a relatively thin thickness, so as to realize a thin design of the camera module 12 and a thin and light design of the electronic device 10.

Referring to fig. 11, in other embodiments, the back cover 115 of the electronic device 10 may be mainly composed of the blue glass 1211 of the filter 121, that is, the blue glass 1211 of the filter 121 extends to cover the battery, that is, the blue glass 1211 extends to form the back cover 115 of the electronic device 10, and the antireflection film 1213 and the near infrared absorption pigment layer 1215 are disposed on the blue glass 1211 corresponding to the light incident position of the camera module 12. In other embodiments, the cover plate of the display module 113 of the electronic device 10 may also be mainly composed of the blue glass 1211 of the filter 121, that is, the blue glass 1211 of the filter 121 extends to cover the display module 113, that is, the blue glass 1211 extends to form the cover plate of the display module 113, and the antireflection film 1213 and the near infrared absorption pigment layer 1215 are disposed at positions of the blue glass 1211 corresponding to the light incident position of the camera module 12. This embodiment improves the integration of the device, facilitates the formation of the antireflection film 1213 and the near-infrared absorbing pigment layer 1215 due to the large area of the blue glass 1211, and reduces the thickness of the camera module 12 due to the default filter 121, thereby achieving a thin design of the camera module 12 and facilitating the light and thin design of the electronic device 10.

Referring to fig. 12, fig. 12 is a schematic structural diagram of an electronic device 10 according to an embodiment of the present disclosure. The electronic device 10 may include Radio Frequency (RF) circuitry 501, memory 502 including one or more computer-readable storage media, input unit 503, display unit 504, sensor 505, audio circuitry 506, Wireless Fidelity (WiFi) module 507, processor 508 including one or more processing cores, and power supply 509. Those skilled in the art will appreciate that the configuration of the electronic device 10 shown in FIG. 12 is not intended to be limiting of the electronic device 10 and may include more or fewer components than shown, or some components may be combined, or a different arrangement of components.

The rf circuit 501 may be used for receiving and sending information, or receiving and sending signals during a call, and in particular, receives downlink information of a base station and then sends the received downlink information to the one or more processors 508 for processing; in addition, data relating to uplink is transmitted to the base station. In general, radio frequency circuit 501 includes, but is not limited to, an antenna, at least one Amplifier, a tuner, one or more oscillators, a Subscriber Identity Module (SIM) card, a transceiver, a coupler, a Low Noise Amplifier (LNA), a duplexer, and the like. In addition, the radio frequency circuit 501 may also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to Global System for Mobile communications (GSM), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCDMA), Long Term Evolution (LTE), email, Short Message Service (SMS), and the like.

The memory 502 may be used to store applications and data. Memory 502 stores applications containing executable code. The application programs may constitute various functional modules. The processor 508 executes various functional applications and data processing by executing application programs stored in the memory 502. The memory 502 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the stored data area may store data (such as audio data, a phonebook, etc.) created according to the use of the electronic device 10, and the like. Further, the memory 502 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device. Accordingly, the memory 502 may also include a memory controller to provide the processor 508 and the input unit 503 access to the memory 502.

The input unit 503 may be used to receive input numbers, character information, or user characteristic information (such as a fingerprint), and generate a keyboard, mouse, joystick, optical, or trackball signal input related to user setting and function control. In particular, in one particular embodiment, the input unit 503 may include a touch-sensitive surface as well as other input devices. The touch-sensitive surface, also referred to as a touch display screen or a touch pad, may collect touch operations by a user (e.g., operations by a user on or near the touch-sensitive surface using a finger, a stylus, or any other suitable object or attachment) thereon or nearby, and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 508, and can receive and execute commands sent by the processor 508.

The display unit 504 may be used to display information input by or provided to the user as well as various graphical user interfaces of the electronic device 10, which may be made up of graphics, text, icons, video, and any combination thereof. The display unit 504 may include a display panel. Alternatively, the Display panel may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like. Further, the touch-sensitive surface may overlay the display panel, and when a touch operation is detected on or near the touch-sensitive surface, the touch operation is transmitted to the processor 508 to determine the type of touch event, and then the processor 508 provides a corresponding visual output on the display panel according to the type of touch event. Although in FIG. 12 the touch sensitive surface and the display panel are implemented as two separate components for input and output functions, in some embodiments the touch sensitive surface may be integrated with the display panel for input and output functions.

The electronic device 10 may also include at least one sensor 505, such as light sensors, motion sensors, and other sensors. Specifically, the light sensor may include an ambient light sensor that adjusts the brightness of the display panel based on the intensity of ambient light, and a proximity sensor that turns off the display panel and/or backlight when the electronic device 10 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which may be further configured to the electronic device 10, detailed descriptions thereof are omitted.

The audio circuitry 506 may provide an audio interface between a user and the electronic device 10 through a speaker, a microphone. The audio circuit 506 can convert the received audio data into an electrical signal, transmit the electrical signal to a speaker, and convert the electrical signal into a sound signal to output; on the other hand, the microphone converts the collected sound signal into an electrical signal, which is received by the audio circuit 506 and converted into audio data, which is then processed by the audio data output processor 508 and then sent to, for example, another electronic device 10 via the rf circuit 501, or output to the memory 502 for further processing. The audio circuitry 506 may also include an earphone jack to provide communication of a peripheral earphone with the electronic device 10.

Wireless fidelity (WiFi) belongs to short-range wireless transmission technology, and the electronic device 10 can help the user send and receive e-mail, browse web pages, access streaming media and the like through the wireless fidelity module 507, and provides wireless broadband internet access for the user. Although fig. 12 shows the wireless fidelity module 507, it is understood that it does not belong to the essential constitution of the electronic device 10, and may be omitted entirely as needed within the scope not changing the essence of the invention.

The processor 508 is a control center of the electronic device 10, connects various parts of the whole electronic device 10 by various interfaces and lines, performs various functions of the electronic device 10 and processes data by running or executing an application program stored in the memory 502 and calling data stored in the memory 502, thereby performing overall monitoring of the electronic device 10. Optionally, processor 508 may include one or more processing cores; preferably, the processor 508 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 508.

The electronic device 10 also includes a power supply 509 (i.e., a battery) to power the various components. Preferably, the power supply 509 may be logically connected to the processor 508 through a power management system, so that the power management system may manage charging, discharging, and power consumption. The power supply 509 may also include any component such as one or more dc or ac power sources, recharging systems, power failure detection circuitry, power converters or inverters, power status indicators, and the like.

Although not shown in fig. 12, the electronic device 10 may further include a bluetooth module or the like, which is not described in detail herein. In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily, and implemented as the same or several entities, and specific implementations of the above modules may refer to the foregoing method embodiment, which is not described herein again.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic device is characterized by comprising a body, a camera module and a protective cover plate, wherein the protective cover plate and the camera module are connected to the body;

the protective cover plate comprises an optical filter; the optical filter includes:

the light transmittance of the blue glass to light with the wavelength within the range of 700-1100 nm is less than 5%, and the blue glass is provided with a first surface and a second surface which are arranged in an opposite mode; and

a antireflection film covering at least one of the first surface and the second surface;

the optical filter is used for covering the camera module, and the blue glass extends and covers the display screen module or the battery.

2. The electronic device according to claim 1, wherein the first surface and the second surface are each covered with the antireflection film, and at least one of the first surface and the second surface is provided with a near-infrared absorbing pigment layer provided between the antireflection film and the blue glass.

3. The electronic device of claim 2, wherein the near-infrared absorbing pigment layer is spin coated on the blue glass.

4. The electronic device of claim 2 or 3, wherein at least one of the near-infrared absorbing pigment layer and the blue glass comprises an ultraviolet light absorbing material to cut off ultraviolet light having a wavelength in a range of 350 nanometers to 380 nanometers.

5. The electronic device according to claim 2, wherein the near-infrared absorbing pigment layer contains an organic pigment so as to be capable of absorbing light in a near-infrared band ranging from 750 nm to 1100 nm.

6. The electronic device according to claim 2, wherein the antireflection film is formed by a spin coating process.

7. The electronic device of claim 1, wherein the camera module comprises a lens and an image sensor, and the protective cover and the lens are disposed on a light incident side of the image sensor.

8. The electronic device of claim 7, wherein the lens is disposed between the protective cover and the image sensor.

9. The electronic device of claim 7, wherein the camera module comprises a housing, and wherein the lens and the image sensor are mounted to the housing, and the lens and the image sensor are positioned by the housing.

10. The electronic device of claim 9, wherein the electronic device includes a circuit board, and wherein the camera module is mounted to the circuit board through the housing and communicatively coupled to a processor on the circuit board.