Method for producing camera module

Patent metadata

Field	Value
Publication number	US-10348968-B2
Application number	US-201415027513-A
Country	US
Kind code	B2
Filing date	Aug 5, 2014
Priority date	Oct 9, 2013
Publication date	Jul 9, 2019
Grant date	Jul 9, 2019

Abstract

An optical section ( 3 ) and a lens holder ( 4 ) are fixed to each other in a state where the lens holder ( 4 ) is at an intermediate position within a movable range so that the optical section ( 3 ) does not come into contact with an image pickup section ( 10 ) in a case where the lens holder ( 4 ) is driven within the movable range. This makes it possible to provide (i) a camera module in which it is possible to reduce the influence of a tilt that occurs in the vicinity of an infinite-distance side mechanical end and also reduce the influence of a tilt that occurs at an intermediate position away from the infinite-distance side mechanical end and a macro side and in which image pickup lenses are attachable with high positional accuracy and (ii) a method for producing a camera module.

First claim

The invention claimed is:

1. A method for producing a camera module,
the camera module including:
an optical section including a plurality of image pickup lenses;
a lens driving device including:
a base;
an intermediate support that is supported by suspension wires with respect to the base movably in a biaxial direction perpendicular to a direction of an optical axis of the plurality of image pickup lenses;
a lens holder configured to hold the optical section;
a protrusion on an infinite-distance side of the lens holder,
the protrusion serving as a movable range limiting section configured to limit,
in the direction of the optical axis of the plurality of image pickup lenses,
a movable range for the lens holder on the infinite-distance side respect to the intermediate support; and
a protrusion on a macro side of the lens holder,
the protrusion serving as a movable range limiting section configured to limit,
in the direction of the optical axis of the plurality of image pickup lenses,
a movable range for the lens holder on the macro side with respect to the intermediate support,
the lens driving device being configured to drive the optical section and the lens holder integrally at least along the optical axis of the plurality of image pickup lenses; and
an image pickup section including an image pickup element,
the image pickup section being disposed on the infinite-distance side of the optical section and the lens driving device,
the method comprising:
a first step of positioning the optical section with respect to the lens holder with use of a dummy sensor cover while sliding the optical section on the lens holder in a state where the lens holder is spaced from the intermediate support and where the lens holder is at an intermediate position within the movable range which intermediate position is away from a movable range limit position on the infinite-distance side and from a movable range limit position on the macro side; and
a second step of fixing the optical section to the lens holder at a position at which the optical section has been positioned through the first step.

2. The method according to claim 1 ,
wherein:
the lens holder is at the intermediate position in a state where the lens driving device is not in operation; and
the first step positions the optical section without driving the lens driving device.

3. The method according to claim 1 ,
wherein:
during the first step, the lens driving device is driven so that the lens holder is held at the intermediate position.

4. The method according to claim 2 ,
wherein:
the lens holder is at the intermediate position in a state where the lens driving device is not in operation; and
the first step positions the optical section by driving the lens driving device so that the lens holder is displaced to a vicinity of a limit of the movable range on the infinite-distance side within the intermediate position.

5. The method according to claim 1 , further comprising:
a third step of placing the image pickup section on the infinite-distance side of the optical section and the lens driving device,
wherein:
the third step is carried out after the first step and the second step.

6. The method according to claim 5 ,
wherein:
the dummy sensor cover is provided with a protrusion configured to separate the dummy sensor cover from the optical section by a predetermined distance;
the first step involves use of the dummy sensor cover so that the optical section is positioned with respect to the lens holder in a state where the optical section abuts on the protrusion; and
the third step involves use of the dummy sensor cover instead of the dummy image pickup section.

7. A method for producing a camera module,
the camera module including:
an optical section including a plurality of image pickup lenses;
a lens driving device including:
a base;
a lens holder configured to hold the optical section;
a protrusion on an infinite-side of the lens holder,
the protrusion serving as a movable range limiting section configured to limit,
in a direction of an optical axis of the plurality of image pickup lenses,
a movable range for the lens holder on the infinite-distance side and a macro side with respect to the base; and
a protrusion on a macro side of the lens holder,
the protrusion serving as a movable range limiting section configured to limit,
in a direction of an optical axis of the plurality of image pickup lenses,
a movable range for the lens holder on the macro side with respect to the base,
the lens driving device being configured to drive the optical section and the lens holder integrally at least along the optical axis of the plurality of image pickup lenses; and
an image pickup section including an image pickup element,
the image pickup section being disposed on the infinite-distance side of the optical section and the lens driving device,
the method comprising:
a first step of positioning the optical section with respect to the lens holder with use of a dummy sensor cover while sliding the optical section on the lens holder in a state where the lens holder is spaced from base and where the lens holder is at an intermediate position within the movable range which intermediate position is away from a movable range limit position on the infinite-distance side and from a movable range limit position on the macro side; and
a second step of fixing the optical section to the lens holder at a position at which the optical section has been positioned through the first step.

Assignees

• Sharp Kk

Inventors

• Sekimoto Yoshihiro

Classifications

• H04N23/54

  Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils · CPC title

• H04N23/687 Primary

  by shifting the lens or sensor position · CPC title

• H04N23/55

  Optical parts specially adapted for electronic image sensors; Mounting thereof · CPC title

• G02B7/08 Primary

  adapted to co-operate with a remote control mechanism · CPC title

• H04N23/57

  Mechanical or electrical details of cameras or camera modules specially adapted for being embedded in other devices · CPC title