Camera module and electronic device

Abstract

A camera module includes an imaging lens, a driving module, and a positioning module. The imaging lens has a central axis. The driving module drives the imaging lens to move along the central axis. The positioning module includes a positioning light source emitting module, a positioning light source receiving module, and a positioning light shield. The positioning light source receiving module receives emitted light from the positioning light source emitting module. The positioning light shield moves synchronously with the imaging lens. When the imaging lens moves along the central axis, the positioning light shield at least partially blocks the emitted light from the positioning light source emitting module, and the light intensity of the emitted light received by the positioning light source receiving module changes with the movement of the positioning light shield, and outputs a corresponding positioning signal according to the received light intensity.

Claims

1. A camera module, comprising: an imaging lens having a central axis; a driving module for driving the imaging lens to move along the central axis; and a positioning module comprising: a positioning light source emitting module; a positioning light source receiving module for receiving emitted light from the positioning light source emitting module; and a positioning light shield for moving synchronously with the imaging lens; wherein, When the imaging lens moves along the central axis, the positioning light shield at least partially blocks the emitted light from the positioning light source emitting module, and the light intensity of the emitted light received by the positioning light source receiving module changes with the movement of the positioning light shield, and outputs a corresponding positioning signal according to the received light intensity.

2. The camera module as described in claim 1, wherein the area of ​​the positioning light shield that blocks the emitted light gradually changes along the direction of the central axis.

3. The camera module as described in claim 1, wherein the positioning light shield includes a light shield body and a hollow structure, the hollow structure penetrating the light shield body, and the hollow structure is used to allow a portion of the emitted light from the positioning light source emitting module to pass through.

4. The camera module as described in claim 1, wherein the light transmittance of the positioning light shield gradually changes along a direction parallel to the central axis.

5. The camera module as claimed in claim 1 further includes a light shield, wherein the light shield extends from the top of the positioning light source emitting module and the top of the positioning light source receiving module toward the positioning light shield, and the light shield is used to block ambient light outside the positioning module.

6. The camera module as described in claim 1 further comprises: a first light-shielding slot for accommodating the positioning light source emitting module; and a second light-shielding slot for accommodating the positioning light source receiving module.

7. The camera module as claimed in claim 1, wherein the positioning light source emitting module comprises a plurality of light source emitting units, and the light source emitting units are arranged in an array.

8. The camera module as claimed in claim 1, wherein the positioning light source emitting module includes a strip light source emitting unit, and the strip light source emitting unit is positioned perpendicular to the central axis.

9. The camera module as described in claim 1 further comprises: a calibration module, including: a calibration light source emitting module; a calibration light source receiving module for receiving calibration light from the calibration light source emitting module; and a calibration light shield for moving synchronously with the imaging lens; wherein, When the imaging lens moves to an origin position along the central axis, the correction shield blocks the correction light emitted by the correction light source emitting module, and the correction light source receiving module outputs a corresponding correction signal.

10. The camera module as claimed in claim 9, wherein in a direction parallel to the central axis, the distance between the correction light source receiving module and the correction light shield is greater than the distance between the positioning light source receiving module and the positioning light shield.

11. The camera module as claimed in claim 1 further includes a storage unit for storing the displacement of the imaging lens.

12. An electronic device comprising: a camera module as described in claim 1.

13. A camera module, comprising: an imaging lens having a central axis; an optical path deflection element disposed on the object side or image side of the imaging lens, the optical path deflection element comprising: at least one reflective surface for deflecting the optical path; a driving module for driving the optical path deflection element to move along the central axis; and a positioning module comprising: a positioning light source emitting module; a positioning light source receiving module for receiving emitted light from the positioning light source emitting module; and a positioning light shield for moving synchronously with the optical path deflection element; wherein, When the optical path deflection element moves along the direction of the central axis, the positioning light shield at least partially blocks the emitted light of the positioning light source emitting module, and the light intensity of the emitted light received by the positioning light source receiving module changes with the movement of the positioning light shield, and outputs a corresponding positioning signal according to the received light intensity.

14. The camera module as described in claim 13, wherein the area of ​​the positioning light shield that blocks the emitted light gradually changes along the direction of the central axis.

15. The camera module as claimed in claim 13, wherein the positioning light shield includes a light shield body and a cutout structure that extends through the light shield body and allows a portion of the emitted light from the positioning light source emitting module to pass through.

16. The camera module as claimed in claim 13, wherein the light transmittance of the positioning light shield gradually changes along a direction parallel to the central axis.

17. The camera module as claimed in claim 13 further includes a light shield, wherein the light shield extends from the top of the positioning light source emitting module and the top of the positioning light source receiving module toward the positioning light shield, and the light shield is used to block ambient light outside the positioning module.

18. The camera module as claimed in claim 13 further comprises: a first light-shielding slot for accommodating the positioning light source emitting module; and a second light-shielding slot for accommodating the positioning light source receiving module.

19. The camera module as claimed in claim 13, wherein the positioning light source emitting module comprises a plurality of light source emitting units, and the light source emitting units are arranged in an array.

20. The camera module as claimed in claim 13, wherein the positioning light source emitting module includes a strip light source emitting unit, and the strip light source emitting unit is positioned perpendicular to the central axis.

21. The camera module as described in claim 13 further comprises: a calibration module, including: a calibration light source emitting module; a calibration light source receiving module for receiving calibration light from the calibration light source emitting module; and a calibration light shield for moving synchronously with the optical path deflection element; wherein, When the optical path deflection element moves to an origin position along the direction of the central axis, the correction shield blocks the correction light emitted by the correction light source emitting module, and the correction light source receiving module outputs a corresponding correction signal.

22. The camera module as claimed in claim 13, wherein the optical path deflection element comprises at least two reflective surfaces and the optical path deflection element is used to deflect the optical path multiple times.

23. An electronic device comprising: a camera module as described in claim 13.

24. A camera module, comprising: an imaging lens having a central axis; a driving module for driving the imaging lens to move along a first direction and / or a second direction, the first direction being different from the second direction, and both the first direction and the second direction being perpendicular to the central axis; a first positioning module, comprising: a first positioning light source emitting module; a first positioning light source receiving module for receiving a first emitted light from the first positioning light source emitting module; and a first positioning light shield for moving synchronously with the imaging lens; and a second positioning module, comprising: a second positioning light source emitting module; a second positioning light source receiving module for receiving a second emitted light from the second positioning light source emitting module; and a second positioning light shield for moving synchronously with the imaging lens; wherein... When the imaging lens moves along the first direction, the first positioning light shield at least partially blocks the first emitted light from the first positioning light source emitting module, and the first light intensity of the first emitted light received by the first positioning light source receiving module changes with the movement of the first positioning light shield, and outputs a corresponding first signal according to the received first light intensity; and wherein, when the imaging lens moves along the second direction, the second positioning light shield at least partially blocks the second emitted light from the second positioning light source emitting module, and the second light intensity of the second emitted light received by the second positioning light source receiving module changes with the movement of the second positioning light shield, and outputs a corresponding second signal according to the received second light intensity.

25. The camera module as claimed in claim 24, wherein the light transmittance of at least one of the first positioning light shield and the second positioning light shield gradually changes along the moving direction of the imaging lens.

26. The camera module as claimed in claim 24 further comprises: a first light shield extending from the top of the first positioning light emitting module and the top of the first positioning light receiving module toward the first positioning light shield, and the first light shield being used to block ambient light outside the first positioning module; and a second light shield extending from the top of the second positioning light emitting module and the top of the second positioning light receiving module toward the second positioning light shield, and the second light shield being used to block ambient light outside the second positioning module.

27. The camera module as claimed in claim 24 further comprises: a first light-shielding slot for accommodating the first positioning light source emitting module and the first positioning light source receiving module; and a second light-shielding slot for accommodating the second positioning light source emitting module and the second positioning light source receiving module.

28. The camera module as claimed in claim 24, wherein the first positioning light source emitting module and the second positioning light source emitting module each include a plurality of light source emitting units, and the light source emitting units are arranged in an array.

29. The camera module as claimed in claim 24, wherein the first positioning light source emitting module and the second positioning light source emitting module each include a strip light source emitting unit, and the strip light source emitting unit is positioned perpendicular to the central axis.

30. An electronic device comprising: a camera module as described in claim 24.

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