Lens module capable of changing focal distance and electronic device using the same

Abstract

A lens module includes a printed circuit board, a lens component, and at least two electric conductors. The lens component includes a first lens and a microscope base, the first lens is formed on the microscope base, the microscope base is formed on the printed circuit board, and the first lens is electrically conductive and deforms under voltage. The first lens is electrically connected to the printed circuit board by the electric conductors. The printed circuit board outputs a voltage to the first lens through the electric conductors; the first lens deforms according to the voltage thereby changing a focal distance of light passing through the first lens. The disclosure also relates to an electronic device using the lens module. The lens module can has a zoom function and has a litter volume.

What is claimed is: 
     
         1 . A lens module comprising:
 a printed circuit board;   a lens component, wherein the lens component comprises a first lens and a microscope base, the first lens is formed on the microscope base, the microscope base is formed on the printed circuit board, the first lens comprises at least two electrodes, a sealing body with a cavity, and a filler sealed in the cavity; and   at least two electric conductors, wherein the first lens is electrically connected to the printed circuit board by the at least two electric conductors; one end of each of the at least two electrodes is electrically connected to a corresponding one of the at least two electric conductors, the other end of each of the at least two electrodes extends to the cavity and is electrically connected to the filler, the printed circuit board outputs a voltage to the first lens through the at least two electric conductors; the first lens is configured to deform under a change of the voltage applied to the first lens, thereby changing a focal distance of the first lens.   
     
     
         2 . The lens module of  claim 1 , wherein at least two first receiving grooves are defined in an outer wall of the microscope base, and the at least two electric conductors are received in the at least two first receiving grooves. 
     
     
         3 . The lens module of  claim 2 , wherein the lens module further comprises a bearing seat mounted on the printed circuit board, the at least two first receiving grooves are defined in an outer wall of the bearing seat, and the at least two first receiving grooves are defined from the first lens to the outer wall of the microscope base and from the outer wall of the bearing seat to the printed circuit board. 
     
     
         4 . The lens module of  claim 1 , wherein the lens component further comprises a second lens received in the microscope base, the second lens is formed between the first lens and the microscope base. 
     
     
         5 . The lens module of  claim 1 , wherein at least two second receiving grooves are defined in the printed circuit board, at least two conductive terminals are received in the at least two second receiving grooves; the conductive terminals have opposite polarity; the at least two electrodes have opposite polarity; the at least two electrodes are electrically connected to the conductive terminals formed on the printed circuit board to electrically connect to a positive pole and a negative pole of the printed circuit board. 
     
     
         6 . The lens module of  claim 1 , wherein the filler is at least one of a liquid filler and a solid filler. 
     
     
         7 . The lens module of  claim 1 , wherein the sealing body is made from a euphotic material. 
     
     
         8 . The lens module of  claim 1 , wherein the filler is a liquid filler, the filler comprises a first liquid and a second liquid; the first liquid and the second liquid cannot dissolve with each other; at least one of the first liquid and the second liquid is electrically conductive and deforms under a change of the voltage to change a shape and a curvature of a contacting surface between the first liquid and the second liquid thereby changing the focal distance of the first lens. 
     
     
         9 . The lens module of  claim 3 , wherein the lens module further comprises a sensor formed on and electrically connected to the printed circuit board; a through hole is defined in the bearing seat; and the through hole penetrates through the bearing seat and faces the sensor. 
     
     
         10 . An electronic device, comprising:
 a body;   a lens module mounted in the body comprising:
 a printed circuit board; 
 a lens component, wherein the lens component comprises a first lens and a microscope base, the first lens is formed on the microscope base, the microscope base is formed on the printed circuit board, the first lens comprises at least two electrodes, a sealing body with a cavity, and a filler sealed in the cavity; and 
 at least two electric conductors, wherein the first lens is electrically connected to the printed circuit board by the at least two electric conductors; one end of each of the at least two electrodes is electrically connected to a corresponding one of the at least two electric conductors, the other end of each of the at least two electrodes extends to the cavity and is electrically connected to the filler, the printed circuit board outputs a voltage to the first lens through the at least two electric conductors; 
   the first lens is configured to deform under a change of the voltage applied to the first lens, thereby changing a focal distance of the first lens.   
     
     
         11 . The electronic device of  claim 10 , wherein at least two first receiving grooves are defined in an outer wall of the microscope base, the at least two electric conductors are received in the at least two first receiving grooves. 
     
     
         12 . The electronic device of  claim 11 , wherein the lens module further comprises a bearing seat mounted on the printed circuit board, the at least two first receiving grooves are defined in an outer wall of the bearing seat, and the at least two first receiving grooves are defined from the first lens to the outer wall of the microscope base and from the outer wall of the bearing seat to the printed circuit board. 
     
     
         13 . The electronic device of  claim 10 , wherein the lens component further comprises a second lens received in the microscope base, the second lens is formed between the first lens and the microscope base. 
     
     
         14 . The electronic device of  claim 10 , wherein at least two second receiving grooves are defined in the printed circuit board, at least two conductive terminals are received in the at least two second receiving grooves; the conductive terminals have opposite polarity; the at least two electrodes have opposite polarity; the at least two electrodes are electrically connected to the conductive terminals formed on the printed circuit board to electrically connect to a positive pole and a negative pole of the printed circuit board. 
     
     
         15 . The electronic device of  claim 10 , wherein the filler is at least one of a liquid filler and a solid filler. 
     
     
         16 . The electronic device of  claim 10 , wherein the sealing body is made from a euphotic material. 
     
     
         17 . The electronic device of  claim 10 , wherein the filler is a liquid filler, the filler comprises a first liquid and a second liquid; the first liquid and the second liquid cannot dissolve with each other; at least one of the first liquid and the second liquid is electrically conductive and deforms under a change of the voltage to change a shape and a curvature of a contacting surface between the first liquid and the second liquid thereby changing the focal distance of the first lens. 
     
     
         18 . The electronic device of  claim 12 , wherein the lens module further comprises a sensor formed on and electrically connected to the printed circuit board; a through hole is defined in the bearing seat; and the through hole penetrates through the bearing seat and faces the sensor.