TWI480579B - Camera module - Google Patents

Camera module Download PDF

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Publication number
TWI480579B
TWI480579B TW098125128A TW98125128A TWI480579B TW I480579 B TWI480579 B TW I480579B TW 098125128 A TW098125128 A TW 098125128A TW 98125128 A TW98125128 A TW 98125128A TW I480579 B TWI480579 B TW I480579B
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TW
Taiwan
Prior art keywords
element
magnetic
fixed
magnetic element
movable
Prior art date
Application number
TW098125128A
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Chinese (zh)
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TW201104283A (en
Inventor
Shun Fan Chiang
Original Assignee
Hon Hai Prec Ind Co Ltd
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Priority to TW098125128A priority Critical patent/TWI480579B/en
Publication of TW201104283A publication Critical patent/TW201104283A/en
Application granted granted Critical
Publication of TWI480579B publication Critical patent/TWI480579B/en

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Description

Camera module

The invention relates to an optical image stabilization technology, in particular to a camera module capable of realizing optical image stabilization.

The camera module controls the length of time that the light is projected onto the image sensor by the shutter. For example, when the shutter speed is 1/2 second, the image sensor is sensitive to 1/2 second, if 1/2 second. The same beam of light moves on the image sensor due to the jitter, and the image sensor records the motion track of the light, making the captured photo obscure. In order to compensate for the amount of light offset caused by jitter, camera modules using image stabilization systems to prevent jitter began to appear in the 1990s. For details, please refer to the paper "Optical image stabilization for digital cameras" by Cardani B. et al., April 2006, Control Systems Magazine, IEEE (Volume 26, Issue 2, Page(s): 21-22).

With the continuous development of digital camera technology, the camera body is often small and light, which is easy to cause hand shake, resulting in blurred images. The following three situations are prone to blurry images: First, long focal length shooting, because the long lens will magnify the amplitude of the camera, slight jitter will also cause greater blur, so the impact of hand vibration on the sharpness of the image is more obvious than using a wide-angle lens. . Second, shooting in low light environment, in indoor, dusk and other weak light source environment, the camera will adjust the shutter speed to slower to increase the amount of light, so it is more prone to jitter. Third, macro shooting, subtle objects in the case of high magnification of the lens, slight vibration It will become quite obvious. These conditions can cause jitter and blur the image. Since the distance of the object being photographed is much larger than the displacement of the camera shake, the main cause of image blur caused by the hand shake is the deflection of the camera itself, rather than the displacement of the camera itself, especially in the case of long-distance shooting. Therefore, the essence of the anti-shake technique is that during camera image correction, the camera shake causes the light to shift corresponding to the imaging position on the camera module.

In view of this, it is necessary to provide a camera module capable of preventing an image shift due to camera shake during shooting.

A camera module will be described below with specific embodiments.

A camera module includes a voice coil motor, a lens module, an image sensor optically coupled to the lens module, a first Hall element, and a control circuit. The voice coil motor includes a fixed element, a movable element, an elastic element, a rolling element, a first magnetic element, and a second magnetic element. The movable element is received in the fixing element, and the elastic element is elastically connected between the movable element and the fixed element. The rolling element is rollably coupled between the stationary element and the movable element. The first magnetic element is fixed to the fixing element, and the second magnetic element is fixed to the movable element and opposite to the first magnetic element. The lens module and the image sensor are housed in the movable element, and the first Hall element is connected to the control circuit and located in the magnetic field of the second magnetic element for sensing the positional relationship between the fixed element and the movable element. The control circuit is configured to control a magnetic force of interaction between the first magnetic element and the second magnetic element according to a sensing result of the first Hall element such that the movable element moves relative to the fixed element by rolling of the rolling element , thereby moving the lens module and the image sensor relative to the fixed component.

The camera module provided by the technical solution can rotate relative between the fixed component and the movable component, and the first Hall component senses a positional relationship between the movable component and the movable component, and the control circuit receives the first The sensing result of the element controls the rotation of the movable element relative to the movable element, thereby compensating for the deflection caused by the vibration, thereby avoiding the imaging blur caused by the camera module when shooting.

10, 20‧‧‧ camera module

100‧‧‧ voice coil motor

110‧‧‧Fixed components

111‧‧‧Fixed frame

1111‧‧‧First side wall

1112‧‧‧ second side wall

1113‧‧‧ third side wall

1114‧‧‧ fourth side wall

1115‧‧‧ accommodating space

1116‧‧‧First receiving hole

1117‧‧‧Second receiving hole

1118‧‧‧ third receiving hole

1119‧‧‧ dent

112‧‧‧ fixed board

1121‧‧‧Receiving Department

1122‧‧‧Fixed Department

1123‧‧‧ inner surface

1124‧‧‧First storage trough

120‧‧‧movable components

121‧‧‧ Containment frame

1211‧‧‧First side panel

1212‧‧‧ second side panel

1213‧‧‧ second side panel

1214‧‧‧4th side panel

1215‧‧‧ top board

1216‧‧‧Second containment space

122‧‧‧Connecting plate

1221‧‧‧Connecting Department

1222‧‧‧Second holding trough

130‧‧‧Flexible components

131‧‧‧First Fixed Department

132‧‧‧Second fixed department

133‧‧ Third Fixed Department

134‧‧‧First flexible joint

1341‧‧‧First extension

1342‧‧‧First connection segment

1343‧‧‧Second extension

135‧‧‧Second elastic connection

1351‧‧‧ third extension

1352‧‧‧Second connection

1353‧‧‧4th extension

141‧‧‧First magnetic component

1411‧‧‧Part 1

1412‧‧‧Part II

142‧‧‧ Third magnetic component

1421‧‧‧Part III

1422‧‧‧Part IV

143‧‧‧ fifth magnetic element

151‧‧‧Second magnetic component

1511‧‧‧First permanent magnet

1512‧‧‧Second permanent magnet

152‧‧‧4th magnetic element

1521‧‧‧ Third permanent magnet

1522‧‧‧fourth permanent magnet

153‧‧‧ sixth magnetic element

160‧‧‧ rolling elements

200‧‧‧ lens module

300‧‧‧Image Sensor

400‧‧‧ circuit board

510‧‧‧First Hall element

520‧‧‧Second Hall element

530‧‧‧ third Hall element

600‧‧‧Control circuit

1 is a perspective view of a camera module provided by an embodiment of the present technical solution.

FIG. 2 is an exploded schematic view of a camera module provided by an embodiment of the present technical solution.

Figure 3 is a schematic cross-sectional view taken along line III-III of Figure 1.

Figure 4 is a schematic cross-sectional view taken along line IV-IV of Figure 1.

FIG. 5 is a schematic cross-sectional view of the camera module of FIG. 3 after being deflected about the X axis.

6 is a schematic cross-sectional view of the camera module of FIG. 4 after being deflected about the Y axis.

FIG. 7 is a schematic diagram of an optical path when a camera module according to an embodiment of the present disclosure is shaken.

FIG. 8 is a schematic diagram of an optical path corrected by a camera module provided by an embodiment of the present technical solution.

The camera module of the present technical solution will be further described in detail below with reference to the accompanying drawings and embodiments.

Referring to FIG. 1 to FIG. 4 , the camera module 10 includes a voice coil motor 100 , a lens module 200 , an image sensor 300 , a circuit board 400 , and a first Hall element 510 . The second Hall element 520, the third Hall element 530, and the control circuit 600.

The voice coil motor 100 includes a fixing member 110, a movable member 120, an elastic member 130 connected between the fixing member 110 and the movable member 120, a first magnetic member 141, a third magnetic member 142, a fifth magnetic member 143, and a second magnetic body. The element 151, the fourth magnetic element 152, and the sixth magnetic element 153 are rotatably coupled to the rolling element 160 between the fixed element 110 and the movable element 120.

The fixing component 110 includes a fixing frame 111 and a fixing plate 112.

The fixing frame 111 has a rectangular fixing frame, and includes a first sidewall 1111, a second sidewall 1112, a third sidewall 1113 and a fourth sidewall 1114. The first sidewall 1111, the second sidewall 1112, the third sidewall 1113 and the fourth sidewall 1114 are enclosed. A first receiving space 1115. The first sidewall 1111 is opposite to the second sidewall 1112 , and the third sidewall 1113 is disposed opposite to the fourth sidewall 1114 . A first receiving hole 1116 is defined in the center of the second side wall 1112, and a second receiving hole 1117 is defined in the center of the third side wall 1113. The third receiving hole 1118 is defined in the center of the fourth side wall 1114. A recess 1119 is formed in the center of one end of the first side wall 1111 parallel to the central axis direction of the fixed frame 111 for fixing and fixing the fixing plate 112 to the fixing frame 111.

In the present embodiment, the direction perpendicular to the third side wall 1113 is defined as the X-axis direction, the direction perpendicular to the first side wall 1111 is defined as the Y-axis direction, and the direction parallel to the central axis of the fixed frame 111 is defined as the Z-axis direction.

The fixing plate 112 is fixed to the fixing frame 111 for fixing the elastic member 130 to the fixing frame 111 and for mating connection with the rolling element 160. The shape of the fixing plate 112 matches the shape of the fixing frame 110. The fixing plate 112 includes a receiving portion 1121 and a fixing portion 1122 that is connected to the receiving portion 1121 . The shape of the receiving portion 1121 is matched with the shape of the recess 1119. The receiving portion 1121 is received in the recess 1119. The fixing portion 1122 is fixed to the first side wall 1111, the third side wall 1113 and the fourth side wall 1114. In the accommodating part 1122 The inner surface 1123 of the accommodating space 1115 is provided with a circular first receiving groove 1124 for receiving the rolling element 160.

The movable element 120 includes a receiving frame 121 and a connecting plate 122.

The receiving frame 121 is received in the first receiving space 1115 and includes a first side plate 1211, a second side plate 1212, a third side plate 1213, a fourth side plate 1214, and a top plate 1215. The first side plate 1211, the second side plate 1212, the third side plate 1213, the fourth side plate 1214, and the top plate 1215 enclose a rectangular parallelepiped second receiving space 1216. The second receiving space 1216 is for accommodating components that require the voice coil motor 100 to be driven, such as a lens or a lens module. The first side plate 1211 is adjacent to the first side wall 1111, the second side plate 1212 is adjacent to the second side wall 1112, the third side plate 1213 is adjacent to the third side wall 1113, and the fourth side plate 1214 is adjacent to the fourth side wall 1114.

The connecting plate 122 is fixed to the receiving frame 121 for cooperating with the fixing plate 113 to receive the rolling element 160. In this embodiment, the connecting plate 122 is fixed to the top plate 1215 of the receiving frame 121 and the first side plate 1211. The connecting plate 122 has a connecting portion 1221. The connecting portion 1221 is disposed between the receiving portion 1121 of the fixing plate 112 and the first side plate 1211. The connecting portion 1221 is not in contact with the receiving portion 1121. A second receiving groove 1222 is defined at a position corresponding to the first receiving groove 1124. The second receiving groove 1222 is also a hemispherical groove. Preferably, the second receiving slot 1222 is equal in size to the first receiving slot 1124.

It can be understood that the first receiving slot 1124 can be opened in the first side wall 1111, and the second receiving slot 1222 is formed in the first side plate 1211. The first receiving slot 1124 is opposite to the second receiving slot 1222, and the enclosed space can be accommodated. The scrolling element 160 is sufficient.

In this embodiment, the elastic member 130 is a spring piece, and includes a first fixing portion 131, a second fixing portion 132, a third fixing portion 133, a first elastic connecting portion 134, and a second elastic joint. The joint 135. The first fixing portion 131 is fixed to the housing frame 121 , and the second fixing portion 132 and the third fixing portion 133 are both fixed to the fixing frame 111 . The first elastic connecting portion 134 is connected between the first fixing portion 131 and the second fixing portion 132 , and the second elastic connecting portion 135 is connected between the first fixing portion 131 and the third fixing portion 133 . In this embodiment, the first fixing portion 131 is fixed to the top plate 1215 of the receiving frame 121, the second fixing portion 132 is fixed between the fixing plate 112 and the third side wall 1113, and the third fixing portion 133 is fixed to the fixing plate 112 and the fourth portion. Between the side panels 1114. The first elastic connecting portion 134 has a "U" shape, and the opening direction faces the second side wall 1112. That is, the first elastic connecting portion 134 includes a first extending portion 1341, a first connecting portion 1342, and a second extending portion 1343 which are connected to each other. The first extending portion 1341 is connected to the first fixing portion 131 and extends in a direction perpendicular to the first side wall 1111 in the direction of the first side wall 1111. The second extending portion 1343 is connected to the second fixing portion 132 and is vertical. The first connecting portion 1342 is connected to the first extending portion 1341 and the second extending portion 1343 adjacent to one end of the first side wall 1111. The second elastic connecting portion 135 has a "U" shape, and the opening direction faces the third side wall 1113. That is, the second elastic connecting portion 135 includes a third extending portion 1351, a second connecting portion 1352, and a fourth extending portion 1353 which are connected to each other. The third extension 1351 is connected to the first fixing portion 131 and extends in a direction perpendicular to the first sidewall 1111 in the direction of the first sidewall 1111. The fourth extension 1343 is connected to the third fixing portion 133 and is vertical. The first side wall 1111 extends in the direction of the first side wall 1111, and the second connecting portion 1352 is connected to the third extending portion 1351 and the fourth extending portion 1353 near one end of the first side wall 1111.

Of course, the elastic member 130 is not limited to the elastic structure in the embodiment, and may be a plurality of springs or the like connected between the movable member 120 and the fixed member 110.

In the embodiment, when the movable element 120 is rotated, the elastic element 130 can be generated. The elastic restoring force causes the movable member 120 to be in an elastic equilibrium position. Of course, the shape of the first elastic connecting portion 134 and the second elastic connecting portion 135 is not limited to the shape provided in the embodiment, and may be a spiral shape, a wave shape or any other shape.

In the present embodiment, the first magnetic element 141, the third magnetic element 142, and the fifth magnetic element 143 are electromagnets. The first magnetic element 141 is fixed to the second side wall 1112 , the third magnetic element 142 is fixed to the third side wall 1113 , and the fifth magnetic element 143 is fixed to the fourth side wall 1114 . The central axis of the first magnetic element 141 is perpendicular to the second side wall 1112, the central axis of the third magnetic element 142 is perpendicular to the third side wall 1113, and the central axis of the fifth magnetic element 143 is perpendicular to the fourth side wall 1114. In this embodiment, the first magnetic element 141 is received and fixed in the first receiving hole 1116, the third magnetic element 142 is received and fixed in the second receiving hole 1117, and the fifth magnetic element 143 is received and fixed in the third receiving hole. Within 1118.

The first magnetic element 141 is opposite the second magnetic element 151 and includes a first portion 1411 above its central axis and a second portion 1412 below its central axis. It can be understood that when a current is passed through the first magnetic element 141, the current of the first portion 1411 flows opposite to the current flow of the second portion 1412.

The second magnetic element 151 is fixed to the second side plate 1212. When a current is passed through the first magnetic element 141, a magnetic force parallel to the Z-axis direction is generated between the second magnetic element 151 and the first magnetic element 141. The second magnetic element 151 includes a first permanent magnet 1511 opposite the first portion 1411 and a second permanent magnet 1512 opposite the second portion 1412. The first permanent magnet 1511 and the second permanent magnet 1512 are disposed adjacent to each other in the direction parallel to the Z-axis, and the magnetic lines of the first permanent magnet 1511 and the second permanent magnet 1512 are opposite to each other. In this embodiment, the S pole of the first permanent magnet 1511 is close to the second side plate 1212, and the N pole of the first permanent magnet 1511 is away from the second side plate 1212. The N pole of the second permanent magnet 1512 is close to the second side plate 1212, the S pole of the second permanent magnet 1512 is away from the second side plate 1212. Of course, in a case where the N pole of the first permanent magnet 1511 is close to the second side plate 1212, the S pole of the first permanent magnet 1511 may also be away from the second side plate 1212. The S pole of the second permanent magnet 1512 is adjacent to the second side plate 1212, and the N pole of the second permanent magnet 1512 is away from the second side plate 1212.

Therefore, when a current is passed through the first magnetic element 141, the currents in the first portion and the second portion are opposite in direction, and the magnetic lines of force in the magnetic field generated by the first permanent magnet 1511 and the second permanent magnet 1512 are located. The direction is also reversed such that the first permanent magnet 1511 and the second permanent magnet 1512 are received in the same direction as the Lorentz force of the central axis of the fixed member 110.

The third magnetic element 142 is opposite the fourth magnetic element 152 and includes a third portion above its central axis and a fourth portion below its central axis. It can be understood that when a current is passed through the third magnetic element 142, the current flow of the third portion 1421 is opposite to the current flow of the fourth portion 1422.

The fourth magnetic member 152 is fixed to the third side plate 1213. The fourth magnetic element 152 is used to receive a force parallel to the Z-axis direction when a current is passed through the third magnetic element 142. The fourth magnetic element 152 includes a third permanent magnet 1521 opposite the third portion 1421 and a fourth permanent magnet 1522 opposite the fourth portion 1422. The third permanent magnet 1521 and the fourth permanent magnet 1522 are disposed adjacent to each other in the direction parallel to the Z-axis, and the magnetic lines of the third permanent magnet 1521 and the fourth permanent magnet 1522 are opposite to each other. In this embodiment, the S pole of the third permanent magnet 1521 is close to the third side plate 1213, and the N pole of the third permanent magnet 1521 is away from the third side plate 1213. The N pole of the fourth magnetic element 1512 is close to the third side plate 1213, and the S pole of the fourth permanent magnet 1522 is away from the third side plate 1213. Of course, in the case where the N pole of the third permanent magnet 1521 is close to the third side plate 1213 and the S pole of the third permanent magnet 1521 is away from the third side plate 1213, the S pole of the fourth permanent magnet 1522 is close to the third side plate 1212, The N pole of the four permanent magnet 1522 is away from the third side plate 1213.

Therefore, when a current is passed through the third magnetic element 142, the current flows in the third portion and the fourth portion are opposite to each other, and the magnetic field lines of the magnetic field generated by the third permanent magnet 1521 and the fourth permanent magnet 1522 are opposite to each other, thereby The third permanent magnet 1521 and the fourth permanent magnet 1522 are oriented in the same direction as the Lorentz force parallel to the central axis of the fixed member 110.

Similarly, the sixth magnetic member 153 is fixed to the fourth side plate 1213 and corresponds to the fifth magnetic member 143. The sixth magnetic element 153 is for causing the sixth magnetic element 153 to receive a force parallel to the Z-axis direction when a current is passed through the fifth magnetic element 143. Moreover, by controlling the direction of the current in the first magnetic element 141 and the fifth magnetic element 143, the second magnetic element 151 and the sixth magnetic element 153 are biased in opposite directions, thereby causing the movable assembly 120 to rotate. Of course, the voice coil motor 100 may not include the sixth magnetic element 153 and the fifth magnetic element 143.

Of course, the second magnetic element 151, the fourth magnetic element 152, and the sixth magnetic element 153 may be fixed to the fixed element 110, and the first magnetic element 141, the third magnetic element 142, and the fifth magnetic element 143 may be fixed correspondingly. In the movable element 120. Of course, the second magnetic element 151, the fourth magnetic element 152, and the sixth magnetic element 153 may also be composed of two electromagnets.

The rolling element 160 is cooperatively received between the fixing element 110 and the movable element 120 such that the movable element 120 is rotatable relative to the fixed element 110. In this embodiment, the rolling element 160 is a spherical ball that is received in the first receiving groove 1124 and the second receiving groove 1222 and is in contact with the inner wall of the first receiving groove 1124 and the inner wall of the second receiving groove 1222. . When the second magnetic element 151 is subjected to a force parallel to the Z-axis direction, then the movable element 120 is the fulcrum element 160 as a fulcrum about a line parallel to the X-axis relative to the solid The fixed element 110 rotates. When the fourth magnetic element 152 and the sixth magnetic element group 153 are subjected to a force parallel to the Z-axis direction, and they are subjected to the opposite direction of the force, the movable element 120 is the fulcrum element 160 as a fulcrum wound parallel to Y. The straight line in the axial direction rotates relative to the fixed element 110.

It can be understood that when the voice coil motor 100 is only used when the second magnetic element 151 is subjected to a force parallel to the Z-axis direction, and the movable element 120 can be rotated about a line parallel to the X-axis, the rolling element 160 can also be A pivot disposed between the movable member 120 and the fixed member 110 in a direction parallel to the X-axis, and the pivot may be an element such as a roller. In this case, the voice coil motor 100 does not need to provide the third magnetic element 142, the fourth magnetic element 152, the fifth magnetic element 143, and the sixth magnetic element 153.

The lens module 200 is received and fixed in the second receiving space 1216 of the receiving frame 121 of the movable element 120 of the voice coil motor 100. The optical axis of the lens module 200 is parallel to the Z axis. The lens module 200 is used for optical imaging. The lens module 200 is optically coupled to the image sensor 300.

The circuit board 400 is used to carry the fixed frame 110 and is used to package the first Hall element 510, the second Hall element 520, the third Hall element 530, and the control circuit 600. The circuit board 400 is disposed perpendicular to the central axis of the fixed component 110.

The first Hall element 510 corresponds to the center of the second magnetic element 151 and is located in the magnetic field of the second magnetic element 151 for measuring the distance between the first Hall element 510 and the second magnetic element 151. The second Hall element 520 corresponds to the center of the fourth magnetic element 152 and is located in the magnetic field of the fourth magnetic element 152 for measuring the distance between the second Hall element 520 and the fourth magnetic element 152. The third Hall element 530 corresponds to the center of the sixth magnetic element 153 and is located in the magnetic field of the sixth magnetic element 153 for measuring the distance between the third Hall element 530 and the sixth magnetic element 153. Second Hall The element 520 and the third Hall element 530 are symmetrically disposed about a central axis of the fixed element 110. The operating current of the Hall element remains the same, and it moves in a uniformly varying magnetic field. The value of the Hall voltage output is determined only by the amount of displacement in the magnetic field. The control circuit 600 is configured to receive the sensing results of the first Hall element 510, the second Hall element 520, and the third Hall element 530, and to the first magnetic element 141 and the third magnetic element 142 according to the sensing result. The fifth magnetic element 153 provides a corresponding current such that the movable element 120 rotates relative to the fixed element 110. Control circuit 600 can be packaged on circuit board 400. The control circuit 600 includes a power supply circuit, a processing chip, a current controller, and the like.

The power supply circuit is configured to provide an operating voltage to the first Hall element 510, the second Hall element 520, the third Hall element 530, the processing wafer, and the current controller. The processing chip is configured to acquire sensing results of the first Hall element 510, the second Hall element 520, and the third Hall element 530, and calculate the deflection of the movable element 120 about the X-axis and the Y-axis according to the sensing result. At the angle, the magnitude and direction of the current to be supplied to the first magnetic element 141, the third magnetic element 142, and the fifth magnetic element 153 are calculated based on the above angles. The current controller is configured to receive a calculation result of the processing chip and control the magnitude and direction of the output current. Since the movement of the fixing element 110 precedes the movable element 120, in this case, the control circuit 600 controls the first magnetic quantity according to the sensing results of the first Hall element 510, the second Hall element 520, and the third Hall element 530. The magnitude and direction of the current in the element 141, the third magnetic element 142, and the fifth magnetic element 153 cause the movable element 120 to rotate relative to the fixed element 110 to adjust the relative positions of the fixed element 110 and the movable element 120.

Referring to FIG. 3 and FIG. 5 together, the control circuit 600 can process the sensing results of the second Hall element 520 and the third Hall element 530 of the first Hall element 510 in the following manner: When no current is passed through the first magnetic element 141, the third magnetic element 142, and the fifth magnetic element 143 in the voice coil motor 100, the movable element 120 does not rotate. At this time, the first Hall element 510 and the second magnetic element The distance D1 between the elements 151 is a determined value, and the distance L1 between the first Hall element 510 and the central axis of the fixed element 110 is also a determined value. When the second magnetic element 151 is subjected to a force to cause the movable element 140 to rotate. Since the angle at which the movable element 140 rotates is small, it is considered that the second magnetic element 151 generates a linear motion with respect to the first Hall element 510. Since the distance between the first Hall element 510 and the second magnetic element 151 is denoted as D1. The processing circuit 600 calculates D1 and D1, and the difference D1, and then the ratio of D1, and L1 is the tangent of the angle at which the movable component 120 is deflected, so that the movable element 120 can be polarized around the X axis at any time. The angle.

Similarly, the second Hall element 520 or the third Hall element 530 can also measure the angle of deflection of the movable element 120 about the Y axis at any time. Referring to FIG. 4 and FIG. 6 , in addition, the angle of rotation of the movable element 120 about the Y axis can also be calculated according to the following manner: when the first magnetic element 141 , the third magnetic element 142 and the fifth magnetic element are in the voice coil motor 100 When there is no current flowing in 143, the movable element 120 does not rotate, the distance between the second Hall element 520 and the fourth magnetic element 152 is equal to the distance D3 between the third Hall element 530 and the sixth magnetic element 153, and the second The distance between the Hall element 520 and the third Hall element 530 is L2, wherein D2, D3, and L2 of one camera module 100 are all determined values, and when the movable element 120 rotates around the Y axis, the second Hall The distance between the element 520 and the fourth magnetic element 152 is changed to D2, and the distance between the third Hall element 530 and the sixth magnetic element 153 is changed to D3, and the difference D between D2 and D3 is calculated. Then, the ratio of D, and L2 is the tangent of the angle at which the movable component 120 is deflected around Y, so that the angle at which the movable element 120 is polarized about the Y axis at any time can be obtained.

Referring to FIG. 3, when the camera module 10 starts to take an image, the elastic member 130 is in a natural state. At this time, the light passes through the lens module 200 to reach the first position of the image sensor 300.

Referring to FIG. 7, when the camera module 10 rotates due to the vibration of the hand, the camera module 10 rotates around the X axis, assuming that the direction of the deflection is the positive direction of the Z axis, and the light passes through the lens module of the camera module 10. The group 200 reaches the second position of the image sensor 300, and the first position and the second position are offset from each other, thus causing image blurring.

Referring to FIG. 8, in the embodiment, during the deflection of the camera module 10, the control circuit 600 controls the direction of the current in the first magnetic component 141 according to the sensing result of the first Hall element 510, so that A magnetic element 141 corresponds to the Lorentz force of the second magnetic element 151 in the negative direction of the Z-axis, so that the second magnetic element 151 deflects the side of the second side plate 1213 of the movable element 120 in the negative direction of the Z-axis, thereby The light above can still reach the first position of the image sensor 300 through the lens module 200, thereby avoiding imaging blur of the camera module 10.

It can be understood that when the camera module 10 rotates due to the vibration of the hand, the camera module 10 rotates around the X axis, and the direction of the current of the first magnetic element 141 can be controlled, assuming that the direction of the deflection is the negative direction of the Z axis. Corresponding to the first magnetic element 141, the second magnetic element 151 receives the Lorentz force in the positive direction of the Z axis, so that the second magnetic element 151 drives the side of the second side plate 1213 of the movable element 120 to deflect in the positive direction of the Z axis. Therefore, the light passing through the lens module 200 can still reach the first position of the image sensor 300.

It can be understood that the control circuit 600 can also control the direction and magnitude of the current in the third magnetic element 142 and the fifth magnetic element 143 according to the sensing results of the second Hall element 520 and the third Hall element 530. The deflection of the Y axis is compensated, thereby The camera module 10 is imaged clearly.

The camera module provided by the technical solution can rotate relative between the fixed component and the movable component, and the Hall component senses the positional relationship between the movable component and the movable component, and the control circuit receives the sense of the Hall component. The measuring structure controls the movable element to rotate relative to the movable element, thereby compensating for the deflection caused by the vibration, thereby avoiding the imaging blur caused by the camera module when shooting.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

10‧‧‧ camera module

112‧‧‧ fixed board

1124‧‧‧First storage trough

122‧‧‧Connecting plate

130‧‧‧Flexible components

141‧‧‧First magnetic component

1411‧‧‧Part 1

1412‧‧‧Part II

151‧‧‧Second magnetic component

1511‧‧‧First permanent magnet

1512‧‧‧Second permanent magnet

160‧‧‧ rolling elements

200‧‧‧ lens module

300‧‧‧Image Sensor

400‧‧‧ circuit board

510‧‧‧First Hall element

Claims (9)

  1. A camera module includes a voice coil motor, a lens module, an image sensor optically coupled to the lens module, a first Hall element, and a control circuit, the voice coil motor including a fixed component, a movable component, An elastic element, a rolling element, a first magnetic element and a second magnetic element, the movable element being received in the fixing element, the elastic element being elastically connected between the movable element and the fixing element, the rolling element being rollably Coupling between the fixed element and the movable element, the first magnetic element is fixed to the fixed element, the second magnetic element is fixed to the movable element, and opposite to the first magnetic element, the lens module The group and the image sensor are housed in the movable element, the first Hall element is connected to the control circuit, and the first Hall element is located in the magnetic field of the second magnetic element for sensing the fixed element and the movable element a positional relationship between the control circuit for controlling a magnetic force of interaction between the first magnetic element and the second magnetic element according to a sensing result of the first Hall element The movable component is moved relative to the fixed component by the rolling of the rolling component, so that the lens module and the image sensor are moved relative to the fixed component, the elastic component is a spring piece, and the second fixing part is sequentially connected, first The elastic connecting portion, the first fixing portion, the second elastic connecting portion and the third fixing portion, the first elastic connecting portion and the second connecting portion are connected to opposite sides of the first fixing portion, the first fixing portion The fixed part is fixed to the movable component, and the second fixing part and the third fixing part are both fixed to the fixing component.
  2. The camera module of claim 1, wherein the camera module further comprises a circuit board, and the fixing component, the first Hall element and the control circuit are fixed to the circuit board.
  3. The camera module of claim 1, wherein the camera module further comprises a control circuit, the first magnetic component is a coil, and the control circuit is configured to receive the sensing of the first Hall component As a result, and controlling the magnitude and current of the current in the first magnetic element according to the sensing result Orienting, thereby causing the movable element to deflect relative to the fixed element.
  4. The camera module of claim 1, wherein the fixing component has a first receiving slot, and the movable component has a second receiving slot corresponding to the first receiving slot, the first receiving slot Cooperating with the second receiving groove to accommodate the rolling elements.
  5. The camera module of claim 1, wherein the fixing component comprises a first sidewall, a third sidewall and a second sidewall connected to each other, the first sidewall is opposite to the second sidewall, and the third sidewall is vertical Connected between the first side wall and the second side wall, the movable element includes a first side plate and a second side plate disposed opposite to each other, the first side plate is adjacent to the first side wall, and the second side wall is adjacent to the second side plate, The rolling element is disposed between the first side plate and the first side wall, the first magnetic element is fixed to the second side wall, the second magnetic element is fixed to the second side plate, the first magnetic element and the second magnetic element The element is adapted to generate an interactive magnetic force to rotate the movable element relative to the fixed element about a direction perpendicular to the third side wall.
  6. The camera module of claim 5, wherein the rolling element is a pivot disposed between the first side panel and the first side wall perpendicular to a central axis of the fixing element.
  7. The camera module of claim 5, wherein the movable element further comprises a third side plate connected between the first side plate and the second side plate, the third side wall being adjacent to the third side plate, The voice coil motor further includes a third magnetic element, a fourth magnetic element and a second Hall element, the third magnetic element is fixed to the third side wall, and the fourth magnetic element is fixed to the third side plate, a second Hall element is located in the magnetic field of the fourth magnetic element and coupled to the control circuit for sensing a distance between the fourth magnetic element and the second Hall element, the control circuit being further used according to the second The sensing result of the element calculates a positional relationship between the fixed element and the movable element, and controls a magnetic force of interaction between the third magnetic element and the fourth magnetic element such that the movable element is relatively opposed by rolling of the rolling element The fixing member rotates in a direction perpendicular to the first sidewall, so that the lens module and the image sensor rotate relative to the fixing component in a direction perpendicular to the first sidewall.
  8. The camera module of claim 7, wherein the fixing assembly further includes a fourth sidewall, the fourth sidewall is opposite to the third sidewall, and is connected between the first sidewall and the second sidewall The movable element further includes a fourth side plate connected between the first side plate and the second side plate, the fourth side wall is adjacent to the fourth side plate, and the camera module further includes a fifth magnetic An element, a sixth magnetic element and a third Hall element, wherein the fifth magnetic element is fixed to the fourth side wall, the sixth magnetic element is fixed to the fourth side plate, and the fifth magnetic element is a coil, the The three Hall element is located in the magnetic field of the sixth magnetic element and is connected to the control circuit for sensing the distance between the sixth magnetic element and the third Hall element, and the control circuit is based on the sensing result of the third Hall element Calculating a positional relationship between the fixed element and the movable element, and controlling a magnetic force of interaction between the fifth magnetic element and the sixth magnetic element such that the movable element is perpendicular to the fixed element by rolling of the rolling element Rotating in the direction of the first side wall, so that the lens module and the image sensor rotate relative to the fixed component in a direction perpendicular to the first side wall.
  9. The camera module of claim 8, wherein the rolling element is a ball, the fixing element has a first receiving groove, and the movable element has a second receiving groove corresponding to the first receiving groove. The first receiving slot and the second receiving slot cooperate to receive the rolling element.
TW098125128A 2009-07-24 2009-07-24 Camera module TWI480579B (en)

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Publication number Priority date Publication date Assignee Title
TWI491251B (en) * 2009-12-30 2015-07-01 Hon Hai Prec Ind Co Ltd Camera module

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100392471C (en) * 2005-06-20 2008-06-04 佳能株式会社 Optical apparatus having image-blur correction/reduction system
CN101246293A (en) * 2007-02-15 2008-08-20 富士能株式会社 Image stabilization unit, image stabilization device, and imaging apparatus
EP2003881A2 (en) * 2007-06-15 2008-12-17 Fujinon Corporation Image blur correction unit, image blur correction device, imaging device and portable device
TW200926560A (en) * 2007-12-04 2009-06-16 Ind Tech Res Inst Voice coil motor

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100392471C (en) * 2005-06-20 2008-06-04 佳能株式会社 Optical apparatus having image-blur correction/reduction system
CN101246293A (en) * 2007-02-15 2008-08-20 富士能株式会社 Image stabilization unit, image stabilization device, and imaging apparatus
EP2003881A2 (en) * 2007-06-15 2008-12-17 Fujinon Corporation Image blur correction unit, image blur correction device, imaging device and portable device
TW200926560A (en) * 2007-12-04 2009-06-16 Ind Tech Res Inst Voice coil motor

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