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Motor for driving liquid lens and lens group

A liquid lens and motor technology, which is applied to lenses, focusing devices of cameras, focusing devices of projectors, etc., can solve the problems of liquid lenses and complex structure of lens groups that are not considered, and achieve sensitive curvature, sensitive adjustment functions, and time saving. Effect

Pending Publication Date: 2019-04-09
DONGGUAN PRECISION PHOTONICS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The driving of the mobile phone lens is generally driven by a voice coil motor. In the prior art, when a voice coil motor is used to drive a liquid lens, the mover of the voice coil motor is used to drive the liquid lens, so that the curvature of the liquid lens changes, and the voice coil motor The direct combination with the liquid lens does not take into account the influence of the structure of the liquid lens on the voice coil motor. Therefore, when the voice coil motor is used to drive the liquid lens, the structure of the lens group composed of the voice coil motor and the liquid lens is relatively complicated; and , the size of the liquid lens is small. When using a voice coil motor to drive the liquid lens, it is necessary to precisely control the displacement of the voice coil motor mover to ensure precise control of the liquid lens

Method used

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  • Motor for driving liquid lens and lens group
  • Motor for driving liquid lens and lens group
  • Motor for driving liquid lens and lens group

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] For the motor driving the liquid lens in this embodiment, refer to figure 1 - Figure 4 As shown, it includes a seat body, a bracket 31 , a carrier 4 , a Hall sensor 73 , a mounting frame 13 , a driving assembly and a second reset member 5 .

[0032]The base body includes a lower cover 12, and an upper cover 11 fixedly connected with the lower cover 12, and the upper cover 11 has an accommodating cavity in which the carrier 4, the first lens 2 and the driving assembly are arranged. , and the cavity opening for the first lens 2 and the carrier 4 to extend out of the accommodating cavity. In this embodiment, the cavity opening is a through hole 112 adapted to the shape of the liquid lens 3 , the first lens 2 and the carrier 4 .

[0033] In this embodiment, the first lens 2 and the carrier 4 protrude from the accommodation cavity, and are connected to the liquid lens 3 outside the accommodation cavity. In order to protect the liquid lens 3, a protective part 111 is provi...

Embodiment 2

[0047] The lens group of this embodiment, such as figure 1 - Figure 4 As shown, it includes the motor for driving the liquid lens, the first lens 2 and the liquid lens 3 in the first embodiment.

[0048] The first lens 2 is fixedly installed on the lower cover 12 and is located in the accommodating cavity, which is an optical lens in this embodiment.

[0049] The liquid lens 3 includes a lens body, a movable plate and liquid arranged in the lens body. The movable plate moves relative to the lens body to adjust the shape of the liquid, and then adjust the curvature of the liquid lens 3 . The lens body is fixedly installed on the first lens 2 , and the first lens 2 is fixedly installed on the lower cover 12 , that is, the liquid lens 3 is installed on the base through the first lens 2 . The first lens 2 and the liquid lens 3 are distributed along the optical axis and arranged correspondingly, the distance between the first lens 2 and the liquid lens 3 is fixed, that is, the f...

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Abstract

The present invention relates to a drive device, in particular to a motor for driving a liquid lens and a lens group. The motor comprises a seat body, a carrier, a first resetting member, a sensor anda driving assembly; the carrier is movably disposed in the seat body in a direction towards or away from the liquid lens; the driving assembly comprises a rotor disposed on the carrier and a stator disposed on the base body, and the stator drives the rotor to move up and down along an optical axis and / or to deflect around the optical axis; the first resetting member is disposed on the liquid lensand acts on the carrier when the carrier moves to provide a reset force for restoring an initial position of the carrier; the sensor and the rotor are correspondingly fixedly arranged in the seat body for sensing the displacement of the mover or the change of the magnetic field; the carrier moves to act on the first resetting member, the first resetting member is displaced relative to the liquidlens so as to adjust the curvature of the liquid lens, and when restoring to the initial position, the first resetting member provides the reset force for restoring to the initial position for the carrier. The motor of the present invention has the advantage of precise control of the liquid lens.

Description

technical field [0001] The invention relates to a driving device, in particular to a motor and a lens group for driving a liquid lens. Background technique [0002] The mobile phone camera is an important part of the mobile phone. Consumers have higher and higher requirements for the functions of the mobile phone camera such as auto focus and optical image stabilization when using the mobile phone. For the beauty and convenience of the mobile phone, the size of the mobile phone camera is also required to be smaller and smaller. . The liquid lens mainly changes the curvature of the interface of the liquid body by applying a voltage to the chamber containing the liquid. The liquid lens can achieve ultra-close focusing without causing a decrease in optical resolution when performing optical anti-shake compensation , and light in weight, suitable for miniaturized imaging devices, therefore, more and more used in mobile phone cameras in recent years. The driving of the mobile p...

Claims

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Application Information

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IPC IPC(8): G02B3/14G02B26/08G03B13/34G03B5/00H04N5/225H04N5/232
CPCG02B26/0875G03B5/00G03B13/34G02B3/14H04N23/55H04N23/685
Inventor 王彬洪航庆刘志远
Owner DONGGUAN PRECISION PHOTONICS LTD
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