CN114779554A - Camera module and electronic equipment - Google Patents

Abstract

The application discloses a camera module and electronic equipment, the camera module includes: a lens, a filter unit and an imaging chip; the filter unit includes: a first light-transmitting medium, a second light-transmitting medium and a hydrophilic encapsulation layer; One side of the hydrophilic encapsulation layer is connected with the first light-transmitting medium, and the other side is connected with the second light-transmitting medium. The hydrophilic encapsulating layer, the first light-transmitting medium and the second light-transmitting medium constitute a chamber; The driving electrode and the liquid; the lens, the first light-transmitting medium, the second light-transmitting medium, and the imaging chip are sequentially arranged along the optical axis direction of the lens; wherein, when the driving electrode applies a preset voltage to the liquid, the liquid spreads on the first Between a light-transmitting medium and a second light-transmitting medium to cut off invisible light; when the driving electrode is powered off, the liquid shrinks at the hydrophilic encapsulation layer.

Description

Camera module and electronic equipment

technical field

The present application relates to the field of optical technology, and in particular, to a camera module and an electronic device.

Background technique

With the rapid development of electronic devices, the camera function has become one of the basic functional configurations of electronic devices such as smart terminals. The size of an imaging chip (sensor) of an electronic device is affected by a camera assembly. Usually, the size of the imaging chip is small, and the image quality of the camera assembly is poor when shooting in a dark light environment.

SUMMARY OF THE INVENTION

The present application aims to provide a camera module and an electronic device to solve the technical problem of poor imaging quality of a camera assembly in the related art when shooting in a dark light environment.

In order to solve the above technical problems, this application is implemented as follows:

In the first aspect, an embodiment of the present application proposes a camera module, the camera module includes: a lens, a filter unit and an imaging chip;

The filter unit includes: a first light-transmitting medium, a second light-transmitting medium and a hydrophilic encapsulation layer; one side of the hydrophilic encapsulation layer is connected with the first light-transmitting medium, and the other side is connected with the second light-transmitting medium, which is hydrophilic The encapsulation layer, the first light-transmitting medium and the second light-transmitting medium form a cavity; the cavity is provided with a driving electrode and a liquid;

The lens, the first light-transmitting medium, the second light-transmitting medium, and the imaging chip are sequentially arranged along the optical axis direction of the lens;

Wherein, when the driving electrode applies a preset voltage to the liquid, the liquid spreads between the first light-transmitting medium and the second light-transmitting medium to cut off invisible light;

In the case of the power-off state of the drive electrode, the liquid shrinks at the hydrophilic encapsulation layer.

In a second aspect, an embodiment of the present application provides an electronic device, and the electronic device includes the camera module of the first aspect.

The camera module in the embodiment of the present application includes: a lens, a filter unit and an imaging chip; the filter unit includes: a first light-transmitting medium, a second light-transmitting medium and a hydrophilic encapsulation layer; one side of the hydrophilic encapsulation layer is connected with the first light-transmitting medium, and the other side is connected with the second light-transmitting medium, and the hydrophilic encapsulation layer, the first light-transmitting medium and the second light-transmitting medium constitute a chamber; the chamber is provided with a driving electrode and a liquid; and, The lens, the first light-transmitting medium, the second light-transmitting medium, and the imaging chip are sequentially arranged along the direction of the optical axis of the lens. Therefore, in the process of shooting with the camera module, if it is necessary to cut off invisible light (for example, when shooting in the daytime), the driving electrode can apply a preset voltage to the liquid in the chamber, so that the liquid spreads on the first light-transmitting medium between the second light-transmitting medium and the second light-transmitting medium to cut off invisible light; if it is necessary to increase the light input of the camera module (for example, when shooting in a dark light environment at night), the driving electrode can be in a power-off state, so that the above-mentioned liquid can be naturally It shrinks at the hydrophilic encapsulation layer to prevent the liquid from blocking the incoming light on the incident light path of the camera module. It can make full use of the energy of invisible light, increase the light intake of the camera module, and improve the shooting quality in the dark light environment.

Additional aspects and advantages of the present application will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

Fig. 1 is one of the structural schematic diagrams of the camera module provided by the embodiment of the present application;

Fig. 2 is an exploded view of the filter unit in Fig. 1;

3 is the second schematic structural diagram of the camera module provided by the embodiment of the present application;

4 is a schematic structural diagram of a second electrode of a camera module provided by an embodiment of the present application;

5 is a third schematic structural diagram of a camera module provided by an embodiment of the present application;

6 is a fourth schematic structural diagram of a camera module provided by an embodiment of the present application;

FIG. 7 is one of the schematic structural diagrams of the electronic device provided by the embodiment of the present application;

FIG. 8 is a second schematic structural diagram of an electronic device provided by an embodiment of the present application;

FIG. 9 is a third schematic structural diagram of an electronic device provided by an embodiment of the present application.

Reference number:

Camera module 1000,

Filter unit 100, first light-transmitting medium 110, second light-transmitting medium 120; hydrophilic encapsulation layer 130, driving electrode 140, first electrode 141, second electrode 142, liquid 150, dielectric hydrophobic layer 160, lens 300 , the imaging chip 400;

Electronic device 200 , angle detection unit 210 , power supply unit 220 , control unit 230 , storage unit 240 .

Detailed ways

Embodiments of the present application will be described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, but should not be construed as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

The features of the terms "first" and "second" in the description and claims of this application may expressly or implicitly include one or more of such features. In the description of this application, unless stated otherwise, "plurality" means two or more. In addition, "and/or" in the description and claims indicates at least one of the connected objects, and the character "/" generally indicates that the associated objects are in an "or" relationship.

In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "vertical", "horizontal", "vertical", "clockwise", "counterclockwise", etc. are based on the orientations shown in the drawings Or the positional relationship is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

In the related art, the camera assembly usually includes an infrared cutoff filter (Infrared cutoff filter, IRCF). After the light entering the camera assembly passes through the infrared light cutoff filter, the non-visible light will be filtered out, and generally only wavelengths of 380nm-780nm light enters the imaging chip in the camera assembly. This structure will not affect the imaging quality of the imaging chip when the light in the environment where the camera assembly is located is bright. However, in a dark light environment, the external ambient light itself is very limited, and the light entering the imaging chip The light will be partially cut off by the infrared light cut filter, resulting in poor image quality of the camera module in a dark light environment. At present, the photosensitive effect of the imaging chip is usually improved through software, but the total light source energy entering the imaging chip has not increased, and the problem of poor imaging quality cannot be fundamentally solved.

However, in the camera module of the present application, if the non-visible light needs to be cut off (for example, when shooting during the day) during the shooting process using the camera module, the driving electrode can apply a preset voltage to the liquid in the chamber, so that the liquid spreads in all places. between the first light-transmitting medium and the second light-transmitting medium to cut off invisible light; if it is necessary to increase the light input of the camera module (for example, when shooting in a dark light environment at night), the driving electrode can be in a power-off state , so that the above-mentioned liquid naturally shrinks at the hydrophilic encapsulation layer, so as to prevent the liquid from being on the incident light path of the camera module and block the incoming light, making full use of the energy of non-visible light, increasing the amount of light entering the camera module, and improving the dark light environment. shooting quality below. That is to say, the present application is a camera module, which can flexibly control the liquid to spread between the first light-transmitting medium and the second light-transmitting medium under different lighting environments, so as to cut off non-visible light (such as infrared light). light), or control the liquid to shrink at the hydrophilic encapsulation layer of the camera module, so that the liquid avoids the amount of light entering the incident light path of the camera module, so as to increase the amount of light entering the camera module, making full use of the energy of non-visible light, increasing the camera module. The light energy absorbed by the imaging chip of the module improves the shooting quality in the dark light environment.

The following describes the camera module 1000 and the electronic device 200 provided by the embodiments of the present application with reference to FIGS. 1 to 9 .

As shown in FIG. 1 , the camera module 1000 includes: a lens 300 , a filter unit 100 and an imaging chip 400 ; the filter unit includes: a first light-transmitting medium 110 , a second light-transmitting medium 120 and a hydrophilic encapsulation layer 130 ; One side of the hydrophilic encapsulation layer 130 is connected with the first light-transmitting medium, and the other side is connected with the second light-transmitting medium. The hydrophilic encapsulating layer, the first light-transmitting medium and the second light-transmitting medium constitute a chamber; There are drive electrodes 140 and liquid 150 .

The lens 300, the first light-transmitting medium 110, the second light-transmitting medium 120, and the imaging chip 400 are sequentially arranged along the optical axis direction of the lens.

Wherein, when the driving electrode applies a preset voltage to the liquid, the liquid spreads between the first light-transmitting medium and the second light-transmitting medium to cut off invisible light;

In the case of the power-off state of the drive electrode, the liquid shrinks at the hydrophilic encapsulation layer.

It can be understood that in this embodiment of the present application, the lens 300, the first light-transmitting medium 110, the second light-transmitting medium 120, and the imaging chip 400 are sequentially arranged along the optical axis of the lens, which means: the lens 300, the filter unit 100, The imaging chip 400 is sequentially arranged on the incident light path of the camera module. Exemplarily, as shown in FIG. 1 , in FIG. 1 , the lens 300 , the filter unit 100 , and the imaging chip 400 are sequentially arranged on the incident light path of the camera module, and the direction of the arrow in FIG. 1 is the light entering the camera module. direction.

Exemplarily, with reference to FIG. 1, as shown in FIG. 2, FIG. 2 is an exploded view of the filter unit in FIG. They are sequentially arranged on the incident light path of the camera module (ie, the lens 300 , the first light-transmitting medium 110 , the second light-transmitting medium 120 and the imaging chip 400 are sequentially arranged along the optical axis direction of the lens). Therefore, when shooting, the incident light passes through the lens, the first light-transmitting medium and the second light-transmitting medium in sequence, and then enters the imaging chip to perform imaging, thereby completing the shooting.

It can be understood that a gap exists between the first light-transmitting medium 110 and the second light-transmitting medium 120 for accommodating and encapsulating the above-mentioned liquid 150 .

In this embodiment of the present application, the above-mentioned liquid 150 may be droplets, such as tiny droplets.

In the embodiment of the present application, the shapes of the first light-transmitting medium 110 and the second light-transmitting medium 120 may be other possible shapes such as a circle, a square, and the like.

Exemplarily, the first light-transmitting medium 110 and the second light-transmitting medium 120 may use glass substrates, such as colorless glass or blue glass that can transmit light.

In the embodiment of the present application, the two sides of the hydrophilic encapsulation layer 130 may be connected to the edge of the first light-transmitting medium 110 and the edge of the second light-transmitting medium 120 , or be connected to the periphery of the first light-transmitting medium 110 , respectively. and the outer periphery of the second light-transmitting medium 120 (ie, connected to the edge near the first light-transmitting medium 110 and the edge of the second light-transmitting medium 120, respectively), as long as the hydrophilic encapsulation layer 130 can interact with the first light-transmitting medium 130 The medium 110 and the second light-transmitting medium 120 only need to form one chamber.

Exemplarily, as shown in FIG. 3 , two sides of the hydrophilic encapsulation layer 130 are respectively connected to the edge of the first light-transmitting medium 110 and the edge of the second light-transmitting medium 120 . It can be seen in FIG. 3 that the hydrophilic encapsulation layer 130 The above-mentioned chamber formed with the first light-transmitting medium 110 and the second light-transmitting medium 120, and the liquid 150 is located in the chamber.

It should be noted that the hydrophilic encapsulation layer 130 can shrink the above-mentioned liquid 150 to the inner side of the side wall of the hydrophilic encapsulation layer 130 when the driving electrode 140 is powered off, that is, when the light input of the camera module needs to be increased. According to the principle that the larger the surface energy, the worse the hydrophobic performance, the material of the hydrophilic encapsulation layer 130 has a larger surface energy. When the surface energy in the camera module is the smallest, the above-mentioned liquid 150 can be accumulated in the hydrophilic encapsulation layer. At 130, the effect of confining the liquid 150 is achieved.

Exemplarily, the material of the hydrophilic encapsulation layer 130 may be hydrophilic fibers, or hydrophilic resins, or other possible materials.

It can be understood that the above-mentioned liquid 150 can be a liquid 150 that can cut off invisible light, for example, a liquid 150 that absorbs infrared light, or a liquid 150 that reflects infrared light, or other possible liquids 150 .

It can be understood that the above-mentioned driving electrodes 140 are located in the chamber and are in contact with the above-mentioned liquid 150 . In this way, in the process of shooting with the camera module, if it is necessary to cut off non-visible light (for example, when shooting during the day), the driving electrode 140 can apply a preset voltage to the liquid 150 in the chamber, so that the liquid 150 can be spread evenly on the first Between a light-transmitting medium 110 and a second light-transmitting medium 120 to cut off invisible light; if it is necessary to increase the light input of the camera module (for example, when shooting at night), the driving electrode 140 can be in a power-off state, so that the above liquid The 150 is naturally contracted at the hydrophilic encapsulation layer 130 to avoid blocking the light input of the camera module, making full use of the energy of invisible light, and increasing the light input of the camera module.

Exemplarily, as shown in FIG. 3 , FIG. 3 shows a possible side view in which the driving electrode 140 may be in a power-off state, and the above-mentioned liquid 150 shrinks naturally at the hydrophilic encapsulation layer 130 . As can be seen in FIG. 3 , the liquid 150 shrinks at the hydrophilic encapsulation layer 130, it can be understood that the liquid 150 can shrink at the hydrophilic encapsulation layer 130 on the inner sidewall of the chamber.

Exemplarily, the camera module includes a wire electrically connected to the driving electrode 140 , one end of the wire may be located in the chamber, the other end may pass through the chamber, and the wire and the chamber are sealed.

In the camera module provided by the embodiment of the present application, if the non-visible light needs to be cut off during the shooting process using the camera module, the driving electrode can apply a preset voltage to the liquid in the chamber, so that the liquid spreads on the first transparent Between the optical medium and the second light-transmitting medium to cut off invisible light (such as infrared light); if it is necessary to increase the light input of the camera module, the driving electrode can be in a power-off state, so that the above-mentioned liquid naturally shrinks to the pro- The water encapsulation layer is used to avoid liquid blocking the light input of the camera module. In this way, when shooting in a dark light environment, the energy of invisible light can be fully utilized, which increases the light input of the camera module and improves shooting in a dark light environment. quality.

Optionally, in the embodiment of the present application, as shown in FIG. 2 , a dielectric hydrophobic layer 160 is further provided in the above-mentioned chamber, and the liquid is located between the dielectric hydrophobic layer and the target light-transmitting medium; the target light-transmitting medium is the first transparent medium. any one of the optical medium and the second light-transmitting medium; wherein, when the driving electrode 140 is in a power-off state, the dielectric hydrophobic layer is not electrified, and the hydrophobic contact angle between the dielectric hydrophobic layer and the liquid is the first angle; in When the drive electrode applies a preset voltage to the liquid, the dielectric hydrophobic layer is electrified, and the hydrophobic contact angle between the dielectric hydrophobic layer and the liquid is a second angle; the first angle is greater than the second angle.

It can be understood that the dielectric hydrophobic layer can transmit light.

In the embodiment of the present application, the material of the dielectric hydrophobic layer may be dielectric and hydrophobic conforming materials, and the dielectric hydrophobic layer has a large dielectric constant and a large hydrophobic angle, so that the driving electrode can apply a preset voltage to the liquid after the drive electrode is applied with a preset voltage. , the liquid can have a large dynamic range along the dielectric hydrophobic layer, and control the free flow of the liquid in the chamber, so that the flow of the liquid can not be affected by the posture of the camera module.

In the embodiment of the present application, the dielectric hydrophobic layer is connected to the driving electrode, so that when the driving electrode is energized (for example, when the driving electrode applies a preset voltage to the liquid), the dielectric hydrophobic layer is in an energized state.

In the embodiment of the present application, according to the principle of electrowetting, the larger the driving voltage, the smaller the hydrophobic angle of the dielectric hydrophobic layer, and the entire film layer of the dielectric hydrophobic layer tends to be in a hydrophilic state.

That is to say, the hydrophobic capability of the dielectric hydrophobic layer is negatively correlated with the electrification voltage of the dielectric hydrophobic layer, that is, the greater the electrification voltage of the dielectric hydrophobic layer, the smaller the hydrophobic capability of the dielectric hydrophobic layer, and the electrification voltage of the dielectric hydrophobic layer. The smaller the value, the greater the hydrophobic ability of the dielectric hydrophobic layer. If the electrification voltage of the dielectric hydrophobic layer is 0, the hydrophobic ability of the dielectric hydrophobic layer is the largest.

In this way, if the non-visible light needs to be cut off, the driving electrode is in an energized state, correspondingly, the dielectric hydrophobic layer is in an energized state, and the hydrophobic ability of the dielectric hydrophobic layer is weakened, so that the liquid quickly and uniformly spreads on the first light-transmitting medium and the second light-transmitting medium. Between two light-transmitting media (that is, between the dielectric hydrophobic layer and the target light-transmitting medium); if it is necessary to increase the light input of the camera module, the driving electrode is in a power-off state, and correspondingly, the dielectric hydrophobic layer is in a power-off state , the hydrophobicity of the dielectric hydrophobic layer is the largest, so that the liquid rapidly shrinks at the hydrophilic encapsulation layer to avoid blocking the light input of the camera module.

Exemplarily, the material of the dielectric hydrophobic layer may be polymethyl methacrylate (PMMA), or polydimethylsiloxane (PDMS).

It can be understood that when the driving electrode is in a power-off state, the dielectric hydrophobic layer is not energized (that is, in a power-off state), and the hydrophobicity of the dielectric hydrophobic layer is the largest in this state; when the driving electrode applies a preset voltage to the liquid In the case where the dielectric hydrophobic layer is electrified, the hydrophobicity of the dielectric hydrophobic layer is weakened compared to the case where the dielectric hydrophobic layer is in an off state. Therefore, the first angle is greater than the second angle.

It can be understood that, as shown in FIG. 2 , the first light-transmitting medium, the dielectric hydrophobic layer, and the second light-transmitting medium are sequentially arranged on the incident light path of the camera module. If the target light-transmitting medium is different, the position of the liquid will be different. Based on this, the present application includes the following possible examples.

In a possible example, if the target light-transmitting medium is the first light-transmitting medium, as shown in FIG. 2 , the liquid 150 is located between the first light-transmitting medium 110 and the dielectric hydrophobic layer 160 .

In another possible example, if the target light-transmitting medium is the second light-transmitting medium, the liquid is located between the second light-transmitting medium and the dielectric hydrophobic layer.

Optionally, in this embodiment of the present application, as shown in FIG. 2 , the above-mentioned driving electrode 140 includes a first electrode 141 and a second electrode 142 ; along the first direction, the first electrode 141 , the liquid 150 , the dielectric hydrophobic layer 160 , the and the second electrodes 142 are arranged in sequence.

Wherein, the first direction is: the direction from the target light-transmitting medium to the dielectric hydrophobic layer.

It can be understood that both the first electrode and the second electrode can transmit light.

Exemplarily, if the target light-transmitting medium is the first light-transmitting medium, as shown in FIG. 2 , along the first direction (the direction from top to bottom in FIG. 2 ), the first light-transmitting medium 110 and the first electrode 141 , the liquid 150 , the dielectric hydrophobic layer 160 , the second electrode 142 , and the second light-transmitting medium 120 are arranged in sequence.

Exemplarily, if the target light-transmitting medium is the second light-transmitting medium, along the first direction, the second light-transmitting medium, the first electrode, the liquid, the dielectric hydrophobic layer, the second electrode, and the first light-transmitting medium are arranged in sequence. .

Optionally, in the embodiment of the present application, as shown in FIG. 2 , the above-mentioned first electrode 141 is an integrated electrode.

It can be understood that the first electrode is an integrally formed electrode.

Exemplarily, the shape of the first electrode is consistent with the shape of the first light-transmitting medium.

Optionally, in the embodiment of the present application, as shown in FIG. 2 , the second electrode 142 is a split electrode, and the second electrode includes a plurality of sub-electrodes, and the plurality of sub-electrodes are arranged at intervals.

Exemplarily, a plurality of sub-electrodes may be uniformly arranged in the above-mentioned chamber. For example, as shown in FIG. 4 , a plurality of sub-electrodes may be arranged in an array in the above-mentioned chamber.

Optionally, in the embodiment of the present application, as shown in FIG. 5 and FIG. 6 , when the camera module is in the first shooting state, under the condition that the driving electrode applies a preset voltage to the liquid, each sub-electrode in the plurality of sub-electrodes The corresponding voltages are equal;

When the camera module is in the second shooting state, under the condition that the driving electrode applies a preset voltage to the liquid, among the plurality of sub-electrodes, the voltage corresponding to each sub-electrode gradually decreases along the second direction.

Exemplarily, when the camera module is in the first shooting state, the camera module may be in a horizontal placement state (or close to a horizontal placement state), and the first light-transmitting medium and the second light-transmitting medium are also in a horizontal placement state (or close to a horizontal placement state). horizontal position).

Exemplarily, the second direction may be the direction of gravity.

Exemplarily, when the camera module is in the second shooting state, the camera module may be in a vertical placement state, and the first light-transmitting medium and the second light-transmitting medium are also in a vertical placement state.

Exemplarily, when the camera module is in the second shooting state, the angle between the camera module and the horizontal plane is greater than or equal to the preset angle, and less than or equal to 90°; similarly, the first light-transmitting medium and the second The included angle between the light-transmitting medium and the horizontal plane is greater than or equal to the preset angle and less than or equal to 90°.

It can be understood that when the camera module is in the first shooting state, and the driving electrode applies a preset voltage to the liquid, it means that the light intensity of the environment where the camera module is located is greater than or equal to the preset threshold, and it is necessary to cut off invisible light. Therefore, the driving electrode applies a preset voltage to the liquid, and the voltage corresponding to each sub-electrode in the plurality of sub-electrodes is equal, so that the liquid is uniformly spread between the first light-transmitting medium and the second light-transmitting medium.

It can be understood that when the camera module is in the second shooting state, when the driving electrode applies a preset voltage to the liquid, it means that the light intensity of the environment where the camera module is located is greater than or equal to the preset threshold, and it is necessary to cut off invisible light. Therefore, the driving electrode applies a preset voltage to the liquid, and among the plurality of sub-electrodes, the voltage corresponding to each sub-electrode gradually decreases along the second direction, so that the liquid evenly spreads between the first light-transmitting medium and the second light-transmitting medium between.

In this way, the partition control of the liquid is realized to overcome the influence of different postures of the camera modules on the shooting effect.

Example 1, as shown in FIG. 6, FIG. 6 shows a schematic diagram of the camera module in the second shooting state. In FIG. 6, the second electrode 142 includes 5 groups of sub-electrodes along the second direction, and each group of sub-electrodes can be At least one sub-electrode is included, and the voltages corresponding to each group of sub-electrodes are sequentially 2.5V, 2V, 1.5V, 1V, and 0.5V along the second direction.

In this way, the lower the position is, the lower the voltage corresponding to the sub-electrode of the second electrode is, so that the hydrophobic performance of the liquid in this area is better. becomes worse to overcome the effect of gravity.

Example 2, in conjunction with Example 1 and FIG. 4, it can be seen that each group of sub-electrodes includes 5 sub-electrodes.

It should be noted that the voltage corresponding to each sub-electrode in Example 1 is only a schematic representation. For different camera modules, it is also necessary to compare the gravity performance of different camera modules to actually calculate the voltage distribution.

In the actual scene, the actual voltage distribution of each sub-electrode can be pre-calculated according to the gravity performance of different camera modules, and the voltage distribution table corresponding to the calculated actual voltage distribution can be stored in the storage unit. In the second shooting state, the driving electrode can directly apply a voltage to the liquid according to the voltage distribution pre-stored in the storage unit.

Electrowetting principle: Electrowetting on Dielectric (EWOD) is one of the most effective methods to control tiny droplets by changing the interfacial tension. The voltage outside the electrically-hydrophobic layer) and the conductive liquid on its surface controls the change of the wetting properties of the dielectric layer, and further drives the change of the contact angle of the liquid-solid phase by generating a pressure difference inside it, resulting in the deformation of the droplet, and finally achieves the The purpose of controlling the driving voltage to modulate the shape and position of the droplet. The dielectric layer between electrodes and droplets plays a crucial role in EWOD devices, and the selection of dielectric layer materials and fabrication processes directly affect the performance and applications of the devices. The Young-Lippmann equation can describe the wetting principle of polar liquids with voltage dependence in electrowetting devices.

Young-Lippmann equation, the above equation only applies to ideal smooth, uniform, rigid, inert surfaces, where d is the thickness of the dielectric wetting layer; _γlg is the surface tension of the gas-liquid interface; _ε0 is the vacuum dielectric constant; ε is the dielectric constant of the dielectric wetting layer; V is the applied voltage; θ is the droplet contact angle under the applied voltage V; θ ₀ is the initial static contact angle.

According to the above equation, the threshold voltage is determined by the ratio of the thickness of the dielectric layer to the dielectric constant, so a dielectric film with a high dielectric constant is crucial for lowering the driving threshold voltage, improving device reliability, and ensuring contact during voltage driving. The angle has a large variation range. The low surface energy and low wettability of the dielectric layer are another key factor to ensure more convenient flow of microfluidics on the surface of the film. Therefore, a dielectric layer with a high dielectric constant and a hydrophobic surface is the key to low-voltage electrowetting devices.

Optionally, in the embodiment of the present application, with reference to FIG. 1 and as shown in FIG. 2 , the first light-transmitting medium, the first electrode, the dielectric hydrophobic layer, the second electrode, and the second light-transmitting medium are sequentially arranged on the camera. On the incident light path of the module;

The target light-transmitting medium is the first light-transmitting medium.

Exemplarily, referring to FIG. 1 , it can be known that the direction of the incident light path is from top to bottom. Referring to FIG. 2 , the first light-transmitting medium 110 , the first electrode 141 , the dielectric hydrophobic layer 160 , the second electrode 142 , and the second transparent medium 110 . The optical media 120 are arranged sequentially from top to bottom. In this example, the liquid 150 is located between the first electrode 141 and the dielectric hydrophobic layer 160 .

Optionally, in the embodiment of the present application, the first electrode and the second electrode are both light-transmitting conductive films.

Exemplarily, both the first electrode and the second electrode may be an indium tin oxide semiconductor transparent conductive film, or other possible light-transmitting conductive films.

Optionally, in the embodiment of the present application, the first electrode is plated on the surface of the first light-transmitting medium, and the second electrode is plated on the surface of the second light-transmitting medium.

Exemplarily, the first electrode may be vapor-deposited on the surface of the first light-transmitting medium, and the second electrode may be vapor-deposited on the surface of the second light-transmitting medium.

Exemplarily, the surface of the side of the first light-transmitting medium close to the second light-transmitting medium may be plated with the first electrode on the entire surface.

It can be understood that each sub-electrode of the second electrode is plated on the surface of the second light-transmitting medium by partitioning.

An embodiment of the present application further provides an electronic device 200, as shown in FIG. 7, the electronic device includes the camera module 1000 in any one of the foregoing embodiments.

Optionally, in the embodiment of the present application, with reference to FIG. 7 , as shown in FIG. 8 , the above-mentioned electronic device includes an angle detection unit 210 , a power supply unit 220 and a control unit 230 ; the angle detection unit is used to detect the tilt angle of the electronic device; The unit is respectively connected with the angle detection unit and the power supply unit; the power supply unit is connected with the driving electrodes of the camera module; the control unit is used for controlling the supply voltage of the power supply unit to the driving electrodes according to the tilt angle detected by the angle detection unit.

It can be understood that the tilt angle of the electronic device detected by the angle detection unit is the tilt angle of the camera module. For example, when the camera module is in the first shooting state, the tilt angle corresponding to the camera module (that is, the camera module The angle of the included angle with the horizontal plane) is 0 degrees, and when the camera module is in the second shooting state, the corresponding inclination angle of the camera module is 90 degrees. Wherein, the inclination angle corresponding to the camera module is: the angle between the camera module and the horizontal plane.

Exemplarily, the angle detection unit may use a gyroscope, or other possible structural components for detecting the angle.

It should be noted that, with reference to FIG. 8 , as shown in FIG. 9 , the electronic device may further include a storage unit 240 , and the storage unit 240 may be the aforementioned storage unit.

Exemplarily, the storage unit 240 may include the above-mentioned voltage distribution table, and the control unit is connected to the storage unit for controlling the supply voltage of the power supply unit to the driving electrodes according to the tilt angle detected by the angle detection unit and the voltage distribution table.

Exemplarily, the difference between the voltages of adjacent sub-electrodes along the second direction is positively correlated with the tilt angle of the electronic device.

Exemplarily, the tilt angle of the electronic device may range from 0° to 90°.

In this way, when the electronic device shoots vertically, the control unit can directly control the power supply voltage of the power supply unit to the driving electrodes according to the inclination angle and the voltage distribution table detected by the angle detection unit, thereby controlling the voltage applied by the driving electrodes to the liquid, so that the The liquid spreads evenly between the first light-transmitting medium and the second light-transmitting medium, overcoming the influence of gravity on the liquid distribution.

It can be understood that an electronic device usually includes an angle detection unit, a control unit, a power supply unit and a storage unit. Therefore, these unit devices (ie, the angle detection unit, the control unit, the power supply unit and the storage unit) in the electronic device can be directly reused, to save space on electronic equipment.

In this way, the electronic device of the embodiment of the present application can flexibly control the power supply voltage of the power supply unit to the driving electrodes through the control unit under different lighting environments, according to the tilt angle of the electronic device detected by the angle detection unit, thereby flexibly control the liquid in the camera module to spread between the first light-transmitting medium and the second light-transmitting medium to cut off invisible light (such as infrared light), or control the liquid to shrink at the hydrophilic packaging layer of the camera module , so that the liquid avoids the amount of light entering the incident light path of the camera module, so as to increase the amount of light entering the camera module, can make full use of the energy of invisible light, increase the light energy absorbed by the imaging chip of the camera module, and improve the dark light environment. shooting quality below.

It should be noted that the electronic devices in the embodiments of the present application may include mobile electronic devices and non-mobile electronic devices. Exemplarily, the mobile electronic device may be a mobile terminal device, such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a vehicle electronic device, a wearable device, an ultra-mobile personal computer (UMPC), a netbook, or a personal digital Assistant (personal digital assistant, PDA), etc., the non-mobile electronic device may be a non-mobile terminal device, such as a server, a network attached storage (network attached storage, NAS), a personal computer (personal computer, PC), etc., which are not specifically described in the embodiments of this application. limited.

In the description of this specification, reference to the terms "one embodiment," "some embodiments," "exemplary embodiment," "example," "specific example," or "some examples", etc., is meant to incorporate the embodiments A particular feature, structure, material, or characteristic described by an example or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (10)

1. A camera module is characterized in that,

the camera module comprises: the device comprises a lens, a filtering unit and an imaging chip;

the filtering unit includes: the packaging structure comprises a first light-transmitting medium, a second light-transmitting medium and a hydrophilic packaging layer; one side of the hydrophilic packaging layer is connected with the first light-transmitting medium, the other side of the hydrophilic packaging layer is connected with the second light-transmitting medium, and the hydrophilic packaging layer, the first light-transmitting medium and the second light-transmitting medium form a cavity; a driving electrode and liquid are arranged in the cavity;

the lens, the first light-transmitting medium, the second light-transmitting medium and the imaging chip are sequentially arranged along the optical axis direction of the lens;

wherein, in a case where the driving electrode applies a preset voltage to the liquid, the liquid spreads between the first light-transmitting medium and the second light-transmitting medium to cut off non-visible light;

in the case where the driving electrode is in a power-off state, the liquid contracts at the hydrophilic encapsulation layer.

2. The camera module of claim 1,

a dielectric hydrophobic layer is further arranged in the cavity, and the liquid is located between the dielectric hydrophobic layer and a target light-transmitting medium;

the target light-transmitting medium is any one of the first light-transmitting medium and the second light-transmitting medium;

wherein, under the condition that the driving electrode is in a power-off state, the dielectric hydrophobic layer is not electrified, and a hydrophobic contact angle between the dielectric hydrophobic layer and the liquid is a first angle;

under the condition that the driving electrode applies a preset voltage to the liquid, electrifying the dielectric hydrophobic layer, wherein a hydrophobic contact angle of the dielectric hydrophobic layer and the liquid is a second angle;

the first angle is greater than the second angle.

3. The camera module of claim 2,

the driving electrode comprises a first electrode and a second electrode;

the first electrode, the liquid, the dielectric hydrophobic layer, and the second electrode are sequentially disposed along a first direction;

wherein the first direction is: a direction from the target light-transmitting medium to the dielectric hydrophobic layer.

4. The camera module of claim 3,

the second electrode is a split electrode and comprises a plurality of sub-electrodes which are arranged at intervals.

5. The camera module of claim 4,

when the camera module is in a first shooting state, under the condition that the driving electrode applies preset voltage to the liquid, the voltage corresponding to each sub-electrode in the plurality of sub-electrodes is equal;

when the camera module is in a second shooting state, under the condition that the driving electrode applies preset voltage to the liquid, the voltage corresponding to each sub-electrode in the plurality of sub-electrodes is gradually reduced along a second direction.

6. The camera module of claim 3,

the first light-transmitting medium, the first electrode, the dielectric hydrophobic layer, the second electrode and the second light-transmitting medium are sequentially arranged on an incident light path of the camera module;

the target light-transmitting medium is the first light-transmitting medium.

7. The camera module of claim 6,

the first electrode and the second electrode are both transparent conductive films.

8. The camera module according to claim 7, wherein the first electrode is plated on the surface of the first light-transmitting medium, and the second electrode is plated on the surface of the second light-transmitting medium.

9. An electronic apparatus comprising the camera module according to any one of claims 1 to 9.

10. The electronic device according to claim 9, wherein the electronic device includes an angle detection unit, a power supply unit, and a control unit;

the angle detection unit is used for detecting the inclination angle of the electronic equipment;

the control unit is respectively connected with the angle detection unit and the power supply unit;

the power supply unit is connected with a driving electrode of the camera module;

and the control unit is used for controlling the power supply voltage of the power supply unit to the driving electrode according to the inclination angle detected by the angle detection unit.

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