CN214256446U

CN214256446U - Phase focusing device, camera module and electronic equipment

Info

Publication number: CN214256446U
Application number: CN202120491347.6U
Authority: CN
Inventors: 杨宗保; 郑严
Original assignee: Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2021-03-08
Filing date: 2021-03-08
Publication date: 2021-09-21
Anticipated expiration: 2031-03-08

Abstract

The disclosure relates to a phase focusing device, a camera module and an electronic device, wherein the phase focusing device comprises: a light sensing device including a plurality of light sensing units; the shielding structure covers the photosensitive device and comprises a plurality of shielding units, the shielding units are arranged in one-to-one correspondence with the first photosensitive units in the photosensitive units, and each shielding unit shields at least part of the area corresponding to the first photosensitive unit; the driving structure is in transmission connection with the shielding structure, and the shielding structure drives the plurality of shielding units to move through the driving structure. The structure of the present disclosure can effectively improve the density of the phase detection points. Meanwhile, bad pixel points are effectively reduced, and imaging quality is guaranteed.

Description

Phase focusing device, camera module and electronic equipment

Technical Field

The present disclosure relates to the field of terminals, and in particular, to a phase focusing device, a camera module and an electronic apparatus.

Background

With the progress of technology, electronic devices have become necessities in human life. In the related art, electronic devices such as mobile phones have a shooting function, and focusing methods mainly include contrast focusing and phase focusing in the shooting process of the electronic devices. Phase Detection Auto Focus (PDAF) is performed by reserving a photosensitive unit on a sensor for Phase Detection, and performing accurate focusing according to a Phase difference detected by the photosensitive unit.

The following technical problems exist in the related art: a group of photosensitive units (i.e. a group of phase detection points) for performing phase detection can only be used for phase detection, and the group of photosensitive units can become bad pixels, which affects the imaging quality. In order to control the number of bad pixels, the density of the phase detection points cannot be increased, and the accuracy of the phase detection is affected if the number of the phase detection points is small.

SUMMERY OF THE UTILITY MODEL

To overcome the problems in the related art, the present disclosure provides a phase focusing device, a camera module and an electronic apparatus.

According to a first aspect of the embodiments of the present disclosure, a phase focusing apparatus is provided, including:

a light sensing device including a plurality of light sensing units;

the shielding structure covers the photosensitive device and comprises a plurality of shielding units, the shielding units are arranged in one-to-one correspondence with the first photosensitive units in the photosensitive units, and each shielding unit shields at least partial area corresponding to the first photosensitive unit;

the driving structure is in transmission connection with the shielding structure, and the shielding structure drives the plurality of shielding units to move through the driving structure.

Optionally, the size ratio of the shielding unit to the photosensitive unit is 1: 2;

the shielding unit shields a first area of the first photosensitive unit before movement, and the shielding unit shields a second area of the second photosensitive unit after movement, wherein the second photosensitive unit is adjacent to the first photosensitive unit.

Optionally, the shielding structure comprises: the first transparent substrate, the second transparent substrate and the shielding unit;

the first transparent substrate and the second transparent substrate are arranged oppositely, an accommodating space is formed between the first transparent substrate and the second transparent substrate, and the shielding units are arranged in the accommodating space.

Optionally, the method further comprises: the color filter is arranged on one side, far away from the photosensitive device, of the shielding structure.

Optionally, the driving structure is further connected to the color filter to drive the shielding structure and the color filter to move simultaneously.

Optionally, the method further comprises: installing a frame;

the mounting frame set up in photosensitive device reaches the circumference of sheltering from the structure, the stiff end of drive structure with mounting frame fixed connection, the drive end of drive structure with shelter from the structure.

Optionally, the shape of the shielding structure is set to be square;

either side of the shielding structure extending along the first direction is connected with at least one driving structure, and/or,

any side edge of the shielding structure extending along the second direction is connected with at least one driving structure; wherein the first direction and the second direction are perpendicular.

Optionally, the method further comprises: an elastic member;

one side edge of the shielding structure extending along the target direction is connected with the driving structure;

one end of the elastic piece is connected with the other side edge of the shielding structure extending along the target direction, the other end of the elastic piece is connected with the mounting frame, and the target direction is a first direction and/or a second direction.

Optionally, the driving end of the driving structure is a magnetic part, and the fixed end of the driving structure is a coil.

Optionally, the driving structure comprises: a drive rod and a connecting piece;

one end of the driving rod is connected with the fixed end of the driving structure, and the driving rod is connected with the shielding structure or the color filter through the connecting piece;

the driving rod moves along a first direction or a second direction so as to drive the shielding structure or the color filter to move along the first direction or the second direction through the connecting piece.

Optionally, the driving structure further comprises: the limiting part is arranged at the circumferential edge of the shielding structure or the color filter;

the limiting portion is provided with a first through hole, one end of the connecting piece is assembled with the first through hole, the other end of the connecting piece is provided with a second through hole, and the driving rod is assembled with the second through hole.

Optionally, the drive structure is a shape memory alloy wire driver, a voice coil motor driver, or a piezoelectric ceramic driver.

According to a second aspect of the embodiments of the present disclosure, a camera module is provided, which includes a lens and the phase focusing device described in any one of the above; the lens is positioned on one side of the shielding structure far away from the photosensitive device.

According to a third aspect of the embodiments of the present disclosure, an electronic device is provided, which includes the camera module.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects: the phase focusing device disclosed drives the shielding structure to move through the driving structure, so that the shielding unit can shield different photosensitive units before and after moving, a plurality of groups of phase detection points can be obtained by moving once, and the density of the phase detection points is effectively improved. Simultaneously, owing to shelter from the removal of unit, the sensitization unit for example first sensitization unit can become the non-state of sheltering from by the state of sheltering from to change into normal pixel, effectively reduce bad pixel, guarantee imaging quality.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

Fig. 1 is a schematic diagram of a phase focusing structure in the related art.

Fig. 2 is a schematic diagram illustrating a phase focusing structure according to an exemplary embodiment.

FIG. 3 is a schematic diagram of a photosensitive device shown in accordance with an exemplary embodiment.

Fig. 4 is an exploded view of a phase focusing structure according to an exemplary embodiment.

FIG. 5 is a schematic diagram of an occlusion structure shown in accordance with an exemplary embodiment.

FIG. 6 is a side view of a shielding structure shown in accordance with an exemplary embodiment.

FIG. 7 is a schematic diagram illustrating movement of an occluding structure according to an exemplary embodiment.

Fig. 8 is an enlarged schematic view according to the structure shown at a in fig. 7.

Fig. 9 is a structural diagram illustrating phase focusing according to another exemplary embodiment.

Fig. 10 is a structural diagram illustrating phase focusing according to another exemplary embodiment.

Fig. 11 is an exploded view of a portion of the structure of fig. 10.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.

With the progress of technology, electronic devices have become necessities in human life. In the related art, electronic devices such as mobile phones have a shooting function, and focusing methods mainly include contrast focusing and phase focusing in the shooting process of the electronic devices.

Phase Detection Auto Focus (PDAF) is performed by reserving a photosensitive unit on a sensor for Phase Detection, and performing accurate focusing according to a Phase difference detected by the photosensitive unit.

In the related art, the phase focusing is performed on adjacent photosensitive units, for example, as shown in fig. 1, a light-shielding material is used to shield a left half of a first photosensitive unit 1 ' (left-half-shift), and a light-shielding material is used to shield a right half of a second photosensitive unit 2 ' (right-half-shift) adjacent to the first photosensitive unit 1 ', so as to perform a function similar to that of the left and right eyes of a human body. The first light sensing unit 1 'receives the object light to obtain a first waveform signal, and the second light sensing unit 2' receives the object light to obtain a second waveform signal.

The detected data of the first photosensitive unit 1 'and the second photosensitive unit 2' can be compared, for example, when the first waveform signal and the second waveform signal coincide to indicate that the phase difference of the detected data of the first photosensitive unit and the second photosensitive unit is zero, the focusing state is obtained. For another example, when one waveform signal is located at the front side or the rear side of the second waveform signal, which indicates that there is a phase difference between the detection data of the first photosensitive unit 1 'and the second photosensitive unit 2', the distance and the direction of the lens to be moved need to be determined according to the phase difference, and focusing is performed. When the moving distance is determined, for example, the DAC (Digital to Analog Converter) value of the moving distance is determined in the algorithm library by using the phase difference, and then the motor is controlled to drive the lens to move by a corresponding distance until the phases of the detection data of the first photosensitive unit 1 'and the second photosensitive unit 2' are consistent, so as to complete the focusing process.

A group of photosensitive units (for example, the first photosensitive unit 1 'and the second photosensitive unit 2' which are shielded and adjacent to each other, i.e., a group of phase detection points) for performing phase detection in the related art can only be used for phase detection, and the group of photosensitive units can become a bad pixel. On this basis, the phase focusing structure in the related art has at least the following technical problems:

firstly, in order to avoid the influence of bad pixel points on the imaging quality, separate bad point correction needs to be performed, and the operation is complex.

Secondly, in order to control the number of bad pixels, the density of the phase detection points cannot be increased, and the accuracy of the phase detection is affected if the number of the phase detection points is small.

To solve technical problems in the related art, the present disclosure provides a phase focusing apparatus, including: the photosensitive device comprises a plurality of photosensitive units. The shielding structure covers the photosensitive device and comprises a plurality of shielding units; a plurality of units that shelter from set up with a plurality of first sensitization units one-to-one in the sensitization unit, every shelters from the unit and shelters from the at least partial region of corresponding first sensitization unit. The driving structure is in transmission connection with the shielding structure, and the shielding structure is driven to move through the driving structure to drive the shielding units to move. The phase focusing device disclosed drives the shielding structure to move through the driving structure, so that the shielding unit can shield different photosensitive units before and after moving, a plurality of groups of phase detection points can be obtained by moving once, and the density of the phase detection points is effectively improved. Simultaneously, owing to shelter from the removal of unit, the sensitization unit for example first sensitization unit can become the non-state of sheltering from by the state of sheltering from to change into normal pixel, effectively reduce bad pixel, guarantee imaging quality.

In an exemplary embodiment, as shown in fig. 2 to 11, the phase focusing apparatus of the present embodiment includes: a photosensitive device 10, a shielding structure 20 and a driving structure 30.

The photosensitive Device 10 may be, for example, a Charge Coupled Device (CCD), the photosensitive Device 10 plays a role of photosensitive recording, and when the phase focusing apparatus is used in a terminal Device, the photosensitive Device 10 may be disposed in a camera assembly of the terminal Device. The light sensing device 10 converts light transmitted from the lens into an electrical signal and further into a digital signal.

As shown in fig. 3, the photosensitive device 10 includes a plurality of photosensitive units 101, and the photosensitive units 101 have the same specification. The plurality of photosensitive cells 101 may be arranged in a square array. Here, each light-sensing unit 101 senses R light, G light, or B light, that is, each light-sensing unit 101 can sense monochromatic light (the obtained single light DATA can be referred to as RAW DATA), so each light-sensing unit 101 can be regarded as one pixel or pixel point.

As shown in fig. 4, the shielding structure 20 covers the photosensitive device 10, and the size and shape of the shielding structure 20 may be adapted to the photosensitive device 10, for example, the size and shape of the shielding structure 20 is the same as the size and shape of the photosensitive device 10, or the size of the shielding structure 20 is slightly larger than the size of the photosensitive device 10.

As shown in fig. 5, the shielding structure 20 includes a plurality of shielding units 201, and the shielding units 201 may be distributed on the shielding structure 20 according to a preset arrangement manner.

In one example, the shielding structure 20 includes: the supporting frame and shelter from unit 201, a plurality of units 201 that shelter from distribute on the supporting frame according to the mode of arranging that predetermines. The supporting frame may be, for example, a grid or a lattice, and the shielding units 201 are distributed on the supporting frame at intervals.

In another example, the shielding structure 20 includes: transparent backup pad and shelter from unit 201, a plurality of shelter from unit 201 according to the preset mode of arranging set up with the backup pad on.

In another example, as shown in fig. 6, the shielding structure 20 includes: two transparent plates and shelter from unit 201, a plurality of unit 201 that shelter from can set up in the intermediate layer that two transparent plates formed according to the mode of arranging that predetermines.

In this example, as shown in fig. 6, the shielding structure 20 includes: a first transparent substrate 202, a second transparent substrate 203 and a shielding unit 201.

The first transparent substrate 202 and the second transparent substrate 203 are disposed opposite to each other, an accommodating space 204 is formed between the first transparent substrate 202 and the second transparent substrate 203, and the plurality of shielding units 201 are disposed in the accommodating space 204.

The first transparent substrate 202 and the second transparent substrate 203 may be, for example: transparent glass or film, the shielding unit 201 may be, for example: a photoresist attached to the first transparent substrate 202 or the second transparent substrate 203.

In this embodiment, the plurality of shielding units 201 are disposed in one-to-one correspondence with the plurality of first photosensitive units 1011 in the photosensitive unit 101, and each shielding unit 201 shields at least a partial region corresponding to the first photosensitive unit 1011. At least a part of the area may be, for example, half, one quarter, or three quarters of the first photosensitive unit 1011. For example, in some possible embodiments, the at least partial region may also be the entire region; the driving structure drives the shielding structure to move within a set time, the shielding unit 201 shields all the areas corresponding to the first photosensitive unit 1011 before the shielding structure moves, the shielding unit 201 shields all the areas corresponding to the second photosensitive unit 1012 after the shielding structure moves, and phase focusing is realized by utilizing pixel information of the first photosensitive unit 1011 and the second photosensitive unit 1012 before and after the shielding structure shields, wherein the first photosensitive unit 1011 and the second photosensitive unit 1012 are adjacent.

As shown in fig. 2, the driving structure 30 is in transmission connection with the shielding structure 20, and the shielding structure 20 is driven by the driving structure 30 to move and drives the plurality of shielding units 201 to move. In the moved preset state, each shielding unit 201 shields the second photosensitive unit 1012 adjacent to the corresponding first photosensitive unit 1011. Each of the adjacent first and second

photosensitive units

1011 and 1012 forms a set of phase detection points per completion of the movement. The second photosensitive unit 1012 is: the photosensitive unit 101 adjacent to the first photosensitive unit 1011 in the first direction or the second direction. The first direction may be, for example: the Y direction is shown in fig. 7. The second direction may be, for example: fig. 7 shows the X direction.

As shown in fig. 5 or fig. 7, before the driving structure 30 drives the shielding structure 20 to move, the plurality of shielding units 201 shield the plurality of first photosensitive units 1011 in a one-to-one correspondence manner. As shown in fig. 7, after the driving structure 30 drives the shielding structure 20 to move, the plurality of shielding units 201 move and shield the plurality of second photosensitive units 1012 in a one-to-one correspondence. In fig. 7, the shielding structure 20 of the solid line indicates the state before the movement, and the shielding structure 20 of the broken line indicates the state after the movement. Before and after the movement, the first photosensitive unit 1011 that is shielded and the second photosensitive unit 1012 that is shielded and adjacent can be used as a group of phase detection points.

In this embodiment, the set of phase detection points a in fig. 7 is taken as an example. As shown in fig. 8, each time the shielding structure 20 moves once, the photosensitive unit 101 shielded by each shielding unit 201 is changed from the first photosensitive unit 1011 to the corresponding second photosensitive unit 1012, and two photosensitive units 101 (the first photosensitive unit 1011 and the second photosensitive unit 1012) shielded by each shielding unit 201 before and after the movement form a set of phase detection points. Therefore, after each movement of the shielding structure 20, a plurality of sets of phase detection points can be obtained.

In the phase focusing process, still referring to fig. 8, taking the detection data of a group of phase detection points for phase focusing as an example: the first signal when the shielding unit 201 shields the first photosensitive unit 1011 before the movement is acquired, and the second signal when the shielding unit 201 shields the second photosensitive unit 1012 after the movement is acquired. The processor calculates the phase difference between the acquired first signal and the acquired second signal, determines a Digital to Analog Converter (DAC) value of the moving distance in the algorithm library according to the phase difference, and controls the motor to drive the lens to move the corresponding distance to finish focusing.

In an exemplary embodiment, as shown in fig. 5 or 7, a plurality of shielding units 201 are disposed in one-to-one correspondence with a plurality of first photosensitive units 1011 in the photosensitive unit 101.

In this embodiment: the size ratio of the shielding unit 201 to the photosensitive unit 101 is 1: 2. In each set of phase detection points, the shielding unit 201 shields a first area of the first photosensitive unit 1011 before moving, and the shielding unit 201 shields a second area of the second photosensitive unit 1012 after moving. The position of the first region on the first photosensitive unit 1011 should not be on the same side as the position of the second region on the second photosensitive unit 1012.

In one example, the first region is a left half of the photosensitive unit, and the second region is a right half of the photosensitive unit. As shown in fig. 8, before moving, each shielding unit 201 shields the left half of the corresponding first photosensitive unit 1011 (forming a left-half-shift); after the movement, each shielding unit 201 can shield the right half (right-half-shield) of the corresponding second photosensitive unit 1012, so that each first photosensitive unit 1011 and the corresponding second photosensitive unit 1012 form a set of phase detection points.

In another example, the first region is an upper half of the photosensitive unit, and the second region is a lower half of the photosensitive unit. Before moving, each shielding unit shields the upper side corresponding to the first photosensitive unit; after the movement, each shielding unit can shield the lower half of the corresponding second photosensitive unit, so that each first photosensitive unit and the corresponding second photosensitive unit form a group of phase detection points.

In another example, the first area is a lower left half of a diagonal line of the photosensitive unit, and the second area is an upper right half of the diagonal line of the photosensitive unit, with the diagonal line as a boundary. Before moving, each shielding unit shields the lower left half side of the corresponding first photosensitive unit; after the movement, each shielding unit can shield the upper right side of the corresponding second photosensitive unit, so that each first photosensitive unit and the corresponding second photosensitive unit form a group of phase detection points.

In an exemplary embodiment, as shown in fig. 4, further includes: a color filter 40. The color filter 40 is disposed on a side of the shielding structure 20 away from the photosensitive device 10. In a predetermined direction (illustrated as a Z direction), the color filter 40, the shielding structure 20, and the photosensitive device 10 are sequentially disposed.

In an exemplary embodiment, as shown in fig. 2 to 8, the driving structure 30 is further connected to the color filter 40 to drive the shielding structure 20 and the color filter 40 to move simultaneously.

When the driving structure 30 is only in transmission connection with the shielding structure 20, the driving structure 30 only drives the shielding structure 20 to move, so that phase focusing is realized.

When the driving structure 30 is in transmission connection with the shielding structure 20 and the color filter 40, the driving structure 30 drives the shielding structure 20 and the color filter 40 to move simultaneously. At this time, the size of the color filter 40 should be larger than the array size of the photosensitive device 10.

In an exemplary embodiment, as shown in fig. 9-11, the driving structure 30 includes a driving end and a fixed end. The driving end can be, for example, a movable end for moving the shielding structure 20, and a fixed end, i.e., an end of the driving structure 30 fixed, can also be used for providing power.

In this embodiment, as shown in fig. 2, the phase focusing apparatus of this embodiment further includes: the frame 50 is mounted. The mounting frame 50 is disposed in the circumferential direction of the photosensitive device 10 and the shielding structure 20, the fixed end of the driving structure 30 is fixedly connected to the mounting frame 50, and the driving end of the driving structure 30 is connected to the shielding structure 20. The mounting frame 50 may fix the driving structure 30 and protect the photosensitive device 10 and the shielding structure 20.

Wherein, enough space is reserved between the circumferential direction of the shielding structure 20 and the mounting frame 50 for the shielding structure 20 to move.

In this embodiment, there are various directions in which the driving structure 30 drives the shielding structure 20 to move on the extending plane of the shielding structure 20.

For example, a predetermined distance in the first direction and/or the second direction. The first direction is perpendicular to the second direction. For another example, the shielding structure is moved by a predetermined distance along a diagonal direction of the shielding structure.

As shown in fig. 7, the extending plane of the shielding structure 20 may be, for example, a surface of the first transparent substrate 202 or the second transparent substrate 203. The first direction may be, for example, the Y direction shown in fig. 7, and the second direction may be, for example, the X direction shown in fig. 7.

When the phase focusing apparatus is applied to a terminal device, a processor of the terminal device may issue a control command according to a program pre-stored in the terminal device, where the control command includes a direction, a stroke, and a time of each movement of the shielding structure 20. The driving structure 30 drives the shielding structure 20 to move according to the control command.

In one example, the state before the movement is shown by the solid line in fig. 7, each shielding unit 201 of the shielding structure 20 correspondingly shields the left half of the first photosensitive unit 1011 (forming a left-half-shift).

The driving structure 30 can drive the shielding structure 20 to translate a preset distance along the first direction first, and then drive the shielding structure 20 to translate a preset distance along the second direction, and the total movement duration cannot exceed the preset duration range. The moved state is shown by the dotted line in fig. 7, and each shielding unit 201 of the shielding structure 20 correspondingly shields the right half (right-half-shield) of the second photosensitive unit 1012.

Thus, the shielding structure 20 is translated in a very short time, so that each first photosensitive unit 1011 forms a set of phase detection points with the adjacent second photosensitive unit 1012.

In another example, the driving structure 30 may drive the shielding structure 20 to translate a predetermined distance along the second direction, and then drive the shielding structure 20 to translate a predetermined distance along the first direction. The phase detection point as described above can also be obtained.

In an exemplary embodiment, as shown in fig. 5 or 7, the shielding structure 20 is provided in a square shape. Either side of the shielding structure 20 extending in the first direction is connected to the at least one driving structure 30, and/or either side of the shielding structure 20 extending in the second direction is connected to the at least one driving structure 30.

The number of the driving structures 30 can be set according to actual requirements, for example, when each side is connected with a plurality of driving structures 30, the driving structures 30 move synchronously, so that the shielding structure 20 can be driven to move along the corresponding direction more efficiently and more stably. For convenience of illustration, each side is connected to one of the driving structures 30 in the present embodiment.

In one example, the first side 210 of the shielding structure 20 extending along the first direction is connected to the driving end of the first driving structure 301, and the fixed end of the first driving structure 301 is connected to the mounting frame 50. The first driving structure 301 may control the shielding structure 20 to translate along the second direction according to the control command.

In another example, the second side 220 of the shielding structure 20 extending along the second direction is connected to the driving end of the second driving structure 302, and the fixed end of the second driving structure 302 is connected to the mounting frame 50. The second driving structure 302 can control the shielding structure 20 to translate along the first direction according to the control command.

In another example, the first side 210 of the shielding structure 20 is connected to the driving end of the first driving structure 301, and the second side 220 is connected to the driving end of the second driving structure 302. The first driving structure 301 may control the shielding structure 20 to translate along the second direction according to the control command. The second driving structure 302 can control the shielding structure 20 to translate along the first direction according to the control command.

In an exemplary embodiment, as shown in fig. 2 or fig. 9 to 11, the phase focusing apparatus of the present embodiment further includes: an elastic member 60. The elastic member 60 may be a spring, for example.

Wherein, one side of the shielding structure 20 extending along the target direction is connected to the driving structure 30; one end of the elastic member 60 is connected to the other side of the shielding structure 20 extending along the target direction, and the other end of the elastic member 60 is connected to the mounting frame 50, wherein the target direction is the first direction and/or the second direction.

In one example, the first side 210 of the shielding structure 20 extending along the first direction is connected to the driving end of the first driving structure 301, and the fixed end of the first driving structure 301 is connected to the mounting frame 50. The third side 230 (opposite to the first side 310) is connected to one end of the elastic member 60, and the other end of the elastic member 60 is connected to the mounting frame 50.

The second side 220 of the shielding structure 20 extending along the second direction is connected to the driving end of the second driving structure 302, and the fixed end of the second driving structure 302 is connected to the mounting frame 50. The fourth side 240 (opposite to the second side 220) is connected to one end of the elastic member 60, and the other end of the elastic member 60 is connected to the mounting frame 50.

The number of the elastic members 60 between the third side 230 and the mounting frame 50 and the number of the elastic members 60 between the fourth side 240 and the mounting frame 50 can be set according to actual requirements, and is not particularly limited in this embodiment.

In this embodiment, the first side 210 of the shielding structure 20 is translated along the second direction by the first driving structure 301, and the third side 230 compresses the corresponding elastic element 60 during the moving process. The second side 220 of the shielding structure 20 is translated in the first direction by the second driving structure 302, and the fourth side 240 compresses the corresponding elastic member 60 during the movement process.

In an exemplary embodiment, as shown in fig. 9, the driving end of the driving structure 30 is a magnetic member 310 and the fixed end of the driving structure 30 is a coil 320.

The driving structure 30 may be, for example, a voice coil motor driver (VCM). By changing the direction of the current flowing through the coil, the direction of the attraction force between the coil and the magnetic part is changed, so that the magnetic part has pushing force or pulling force. Thereby, the shielding structure or the color filter is pushed or pulled to move.

In one example, the driving structure may be provided in plural, and for convenience of description, the driving force in each direction is exemplified by one driving structure in this example. Wherein the drive structure is a voice coil motor driver.

As shown in fig. 9, the driving force for the shielding structure 20 to move in the second direction is from the first driving structure 301. The first side 210 of the shielding structure 20 is fixedly connected to the magnetic member 310 of the first driving structure 301, and at least one elastic member 60 is disposed between the third side 230 opposite to the first side 210 and the mounting frame 50.

The driving force for the movement of the shielding structure 20 in the first direction is from the second driving structure 302. The second side 220 of the shielding structure is fixedly connected to the magnetic member 310 of the second driving structure 302, and at least one elastic member 60 is disposed between the fourth side 240 opposite to the second side 220 and the mounting frame 50.

The first driving structure 301 generates a repulsive thrust between the coil 320 and the magnetic member 310 by adjusting the direction of the current in the coil 320 according to the received control command. Thereby pushing the shielding structure 20 to move in the second direction while the elastic member 60 between the third side 230 and the mounting frame 50 is compressed.

The second driving structure 302 generates a repulsive thrust between the coil 320 and the magnetic member 310 by adjusting the direction of the current in the coil 320 according to the received control command. Thereby pushing the shielding structure 20 to move in the first direction while the elastic member 60 between the fourth side 240 and the mounting frame 50 is compressed.

In an exemplary embodiment, the drive structure may also be a piezoceramic driver.

As shown in fig. 10, the fixed end of the driving structure 30 may be a disk structure 330 made of piezoelectric ceramic material, for example. The driving structure 30 includes: and one end of the driving rod 340 is connected with the fixed end of the driving structure 30, and the piezoelectric ceramic can generate mechanical deformation under the action of an electric field, so that the driving rod 340 is driven to move.

The driving structure 30 further includes a connecting member 350, and the driving rod 340 is connected to the shielding structure 20 or the color filter 40 through the connecting member 350. The driving rod 340 moves along the first direction or the second direction to drive the shielding structure 20 or the color filter 40 to move along the first direction or the second direction through the connecting member 350.

In an exemplary embodiment, as shown in fig. 10 and 11, the driving structure 30 further includes: the limiting portion 360 is disposed at a circumferential edge of the shielding structure 20 or the color filter 40.

The limiting part 360 is provided with a first through hole 3601, one end of the connecting piece 350 is assembled with the first through hole 3601, the other end of the connecting piece 350 is provided with a second through hole 3501, and the driving rod 340 is assembled with the second through hole 3501.

The driving rod 340 moves along a direction to drive the connecting member 350 and the limiting portion 360 to move, so as to drive the shielding structure 20 or the color filter 40 to move along a direction; when the shielding structure 20 or the color filter 40 moves in the other direction, the connection member 350 can move in the other direction in the first through hole 3601.

In a specific example, the description is given taking as an example that the driving force in each direction is provided by one driving structure. Wherein the driving structure is a piezoelectric ceramic driver. In this example, the position-limiting portion 360 may be fixed on the shielding structure 20 or fixed on the color filter 40.

As shown in fig. 10 to 11, the driving force for the shielding structure 20 to move in the first direction is from the first driving structure 301. The first side 210 of the shielding structure 20 is provided with a limiting portion 360, and one end of the connecting member 350 is assembled with the first through hole 3601 of the limiting portion 360. The second through hole 3501 at the other end of the connecting member 350 is fitted with the driving lever 340.

According to the control command, the fixed end of the first driving structure 301 deforms under the action of the electric field, and drives the driving rod 340 to move along the first direction. Therefore, the driving rod 340 moves to drive the limiting portion 360 to move through the connecting member 350, the limiting portion 360 drives the shielding structure 20 to move, or the limiting portion 360 drives the shielding structure 20 and the color filter 40 to move together along the first direction.

The driving force for the shielding structure 20 to move in the second direction is from the second driving structure 302, wherein the second driving structure 302 may be disposed on both the second side 220 and the fourth side. The second side edge 220 of the shielding structure 20 is provided with a limiting portion 360, and one end of the connecting member 350 is assembled with the first through hole 3601 of the limiting portion 360. The second through hole 3501 at the other end of the connecting member 350 is fitted with the driving lever 340.

According to the control command, the fixed end of the second driving structure 302 deforms under the action of the electric field, so as to drive the driving rod 340 to move along the second direction. Therefore, the driving rod 340 moves to drive the limiting portion 360 to move through the connecting member 350, the limiting portion 360 drives the shielding structure 20 to move, or the limiting portion 360 drives the shielding structure 20 and the color filter 40 to move together along the second direction.

During the movement in the second direction, the connection member 350 connected to the first side 210 may move in the corresponding first through hole 3601. Similarly, during the movement along the first direction, the connecting element 350 connected to the second side 220 can also move in the corresponding first through hole 3601. Therefore, while the shielding structure 20 is effectively moved in the second direction, the size of the driving structure 30 can be reduced, which is beneficial to controlling the size of the whole phase focusing structure. The elastic member 60 may not be provided in this embodiment.

In an exemplary embodiment, the driving structure 30 may also be: a shape memory alloy wire driver.

As shown in fig. 2 and 7, the fixing end of the Shape Memory Alloy (SMA) wire is fixed to the mounting frame 50, and the driving end is connected to the shielding structure 20. The SMA wires can deform under temperature change, thereby generating a driving force to drive the shielding structure 20 to move.

As shown in fig. 2, the first side 210 and the second side 220 of the shielding structure 20 are connected to different driving structures (a first driving structure 301 and a second driving structure 302), respectively.

The first driving structure 301(SMA wire) connected to the first side 210 provides a driving force along the second direction, and drives the shielding structure 20 to move along the second direction. While the elastic member 60 between the third side 230 and the mounting frame 50 is compressed.

A second driving structure 302(SMA wire) connected to the second side 220 provides a driving force in the first direction to drive the shielding structure 20 to move in the first direction. While the elastic member 60 between the fourth side 240 and the mounting frame 50 is compressed.

In an exemplary embodiment, the present disclosure further provides a camera module, which includes a lens and the phase focusing device in the above embodiments. The lens is located the one side that shelters from the structure and keeps away from photosensitive device.

As shown in fig. 4, in the direction of light incidence on the camera module, there are a lens (Micro lens), a color filter (color filter)40, a shielding structure 20, and a light sensor 10(sensor array) in sequence.

In an exemplary embodiment, the present disclosure further provides an electronic device including the camera module of the above embodiment. The electronic device may be a portable device with a camera function, such as a notebook computer, a mobile phone, and a tablet computer. The processor of the electronic equipment is communicated with the image processor of the camera module and can issue a control instruction for driving the shielding structure to move.

Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the embodiments disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.

It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A phase focusing apparatus, comprising:

a light sensing device including a plurality of light sensing units;

2. The phase focusing device according to claim 1, wherein the size ratio of the shielding unit to the photosensitive unit is 1: 2;

3. The phase focusing device of claim 1, wherein the shielding structure comprises: the first transparent substrate, the second transparent substrate and the shielding unit;

4. The phase focusing device of claim 1, further comprising: the color filter is arranged on one side, far away from the photosensitive device, of the shielding structure.

5. The phase focusing device as claimed in claim 4, wherein the driving structure is further connected to the color filter for driving the shielding structure and the color filter to move simultaneously.

6. The phase focusing device of claim 1, further comprising: installing a frame;

the installation frame set up in photosensitive device reaches the circumference of sheltering from the structure, the stiff end of drive structure with installation frame fixed connection, the drive end of drive structure with shelter from the structural connection.

7. The phase focusing device of claim 6, wherein the shielding structure is provided in a square shape;

8. The phase focusing device of claim 7, further comprising: an elastic member;

9. The phase focusing device of claim 6, wherein the driving end of the driving structure is a magnetic member and the fixed end of the driving structure is a coil.

10. The phase focusing device of claim 6, wherein the driving structure comprises: a drive rod and a connecting piece;

11. The phase focusing device of claim 10, wherein the driving structure further comprises: the limiting part is arranged at the circumferential edge of the shielding structure or the color filter;

12. The phase focusing device of claim 6, wherein the driving structure is a shape memory alloy wire driver, a voice coil motor driver, or a piezoceramic driver.

13. A camera module, comprising a lens and the phase focusing device of any one of claims 1 to 12; the lens is positioned on one side of the shielding structure far away from the photosensitive device.

14. An electronic device comprising the camera module of claim 13.