Camera module having driving driver and sensor units for lens movement

1 . A camera module comprising:

a magnet disposed on a mover configured to move at least one lens;

a first sensor unit and a second sensor sense a position of the magnet along a first direction; and

a driving driver configured to receive a first sensing signal of the first sensor unit and a second sensing signal of the second sensor unit,

wherein the first sensor unit senses the position of the magnet corresponding to a first region among moving regions of the mover,

wherein the second sensor unit senses the position of the magnet corresponding to a second region among the moving regions,

wherein the first region and the second region are arranged in the first direction,

wherein a first output of the first sensor unit and a second output of the second sensor unit are connected to the driving driver, and the first output and the second output are not connected to each other, and

wherein the driving driver includes:

a first amplification unit electrically connected to the first sensor unit via the first output and configured to amplify the first sensing signal based on a first gain value; and

a second amplification unit electrically connected to the second sensor unit via the second output and configured to amplify the second sensing signal based on a second gain value.

2 . The camera module of claim 1 , wherein the magnet is coupled to the mover to linearly move between a first point closest to an image side and a second point closest to an object side.

3 . The camera module of claim 2 , wherein the first sensor unit is disposed to correspond to a position between the first point and a third point between the first point and the second point.

4 . The camera module of claim 2 , wherein the second sensor unit is disposed to correspond to a position between the second point and a third point between the first point and the second point.

5 . The camera module of claim 2 , wherein the first sensor unit is disposed to be spaced a predetermined distance from the second sensor unit in a moving direction of the mover, and

the predetermined distance is smaller than a length of the first sensor unit in the moving direction of the mover.

6 . The camera module of claim 1 , wherein the first region and the second region do not overlap each other.

7 . The camera module of claim 2 , wherein the driving driver calibrates the first sensor unit to sense the first region based on a first sensing value sensed by the first sensor unit when the magnet is positioned at the first point and a second sensing value sensed by the first sensor unit when the magnet is positioned at a third point between the first point and the second point.

8 . The camera module of claim 7 , wherein the driving driver includes:

a first analog-to-digital convert (ADC) unit configured to receive the amplified first sensing signal and convert the received first sensing signal into a digital signal, and

the first gain value is set based on the first sensing value and the second sensing value.

9 . The camera module of claim 2 , wherein the driving driver calibrates the second sensor unit to sense the second region based on a third sensing value sensed by the second sensor unit when the magnet is positioned at the second point and a fourth sensing value sensed by the second sensor unit when the magnet is positioned at a third point between the first point and the second point.

10 . The camera module of claim 9 , wherein

the driving driver includes a second analog-to-digital convert (ADC) unit configured to receive the amplified second sensing signal and convert the received second sensing signal into a digital signal, and

the second gain value is set based on the third sensing value and the fourth sensing value.

11 . The camera module of claim 1 , wherein the driving driver generates a final sensing signal based on the first sensing signal and the second sensing signal.

12 . The camera module of claim 6 , wherein the first region is a region between the first point and a third point, and the third point is a center point of the first point and the second point.

13 . The camera module of claim 12 , wherein the second region is a region between the second point and the third point.

14 . The camera module of claim 2 , wherein the first sensor unit and the second sensor unit are disposed side by side to correspond to the first region and the second region, respectively, in a moving direction of the magnet.

15 . The camera module of claim 5 , wherein the predetermined distance is smaller than a length of the second sensor unit in the moving direction of the mover.

16 . The camera module of claim 1 , wherein the first output of the first sensor unit includes two output terminals.

17 . The camera module of claim 16 , wherein the two output terminals of the first sensor unit are respectively connected to an inverting input terminal and a non-inverting input terminal of the first amplification unit.

18 . The camera module of claim 1 , wherein the second output of the second sensor unit includes two output terminals.

19 . The camera module of claim 18 , wherein the two output terminals of the second sensor unit are respectively connected to an inverting input terminal and a non-inverting input terminal of the second amplification unit.

20 . The camera module of claim 17 , wherein an output terminal of the first amplification unit is connected to an input terminal of the first ADC unit, and the output terminal of the first amplification unit transmits the amplified first sensing signal to the first ADC unit.