This patent application is assigned to
The following quote was obtained by the news editors from the background information supplied by the inventors: "The teachings in accordance with the exemplary embodiments of this present disclosure generally relate to a camera module and a light blocking layer forming method of the camera module.
"Recently, demand on small-sized camera modules is high as image input devices for various multimedia fields such as tablet computers, camera phones, PDAs (Personal Digital Assistants), smart phones, toys, monitoring cameras and video tape recorders. Particularly, the smart phones require small-sized camera modules in response to increased demand by consumers preferring miniaturized designs.
"The camera module is generally manufactured using an image sensor chip or a photoelectric conversion device of a CCD (Charge Coupled Device) type or a CMOS (Complementary Metal Oxide Semiconductor) type to converge light from an object to a photosensitive element through a lens and to form an image of the object on a display medium such as an LCD (Liquid Crystal Display) display device."
In addition to the background information obtained for this patent application, VerticalNews journalists also obtained the inventor's summary information for this patent application: "An object of the present disclosure is to provide a camera module integrally formed with a light blocking layer to allow forming an aperture on an outermost lens of an auto focusing unit using lens movement or on a moving lens.
"In order to achieve at least the above object, in whole or in part, and in accordance with the purposes of the disclosure, as embodied and broadly described, and in one general aspect of the present disclosure, there is provided a camera module, the camera module comprising:
"a lens holder configured to support a plurality of sheets of lenses;
"an actuator configured to be arranged at an upper surface of the lens holder;
"an outermost lens configured to move along an optical axis by the actuator; and
"a light blocking layer configured to be positioned on a surface of the outermost lens.
"Preferably, but not necessarily, the light blocking layer may be formed by any one method of painting or stamping on the surface of the outermost lens.
"Preferably, but not necessarily, the light blocking layer may be positioned on at least one of an exposed surface of the outermost lens and a non-exposed floor surface opposite to the lens.
"Preferably, but not necessarily, a holder cover may be interposed between the lens holder and the actuator.
"Preferably, but not necessarily, the holder cover may be conductibly connected to the actuator.
"Preferably, but not necessarily, the light blocking layer may take a shape of a disc centrally formed with a through hole.
"Preferably, but not necessarily, the actuator may be any one of a micro actuator, a liquid crystal lens, a piezoelectric polymer lens, a non-MEMS (Micro Electro Mechanical System) actuator, a MEMS actuator, a silicon type actuator and a liquid lens.
"In another general aspect of the present disclosure, there is provided a light blocking layer forming method of a camera module, the method comprising:
"forming a light blocking stamping surface on a substrate;
"contacting a master mold formed with a ring-shaped lug to the light blocking stamping surface;
"forming a light blocking layer by transcribing the light blocking layer on the lug using a surface energy difference; and
"forming the ring-shaped light blocking layer on an exposed outermost lens surface by contacting the ring-shaped light blocking layer transcribed on the lug to an outermost lens surface activated by an actuator and by transcribing the light blocking layer to the outermost lens surface using a surface energy difference.
"Preferably, but not necessarily, the step of transcribing the light blocking layer may include aligning a center of the outermost lens to a center of the ring-shape lug.
"Preferably, but not necessarily, the step of transcribing the light blocking layer may include aligning a distal end of the ring-shaped lug to a periphery of the outermost lens by forming a diameter of the ring-shaped lug corresponding to a diameter of the outermost lens.
"Preferably, but not necessarily, the step of transcribing the light blocking layer to the outermost lens surface may include transcribing the light blocking layer to an exposed upper surface of the outermost lens.
"Preferably, but not necessarily, the step of transcribing the light blocking layer to the outermost lens surface may include transcribing the light blocking layer to an exposed surface of the outermost lens.
"The present disclosure has an advantageous effect in that an outermost lens moving for auto focusing function is formed with an aperture using a light blocking layer to simplify a manufacturing process thereby dispensing with inconvenience of forming an aperture using a separate film member.
"Another advantageous effect is that a lens weight can be reduced compared with a lens using a conventional light blocking layer to thereby improve a response characteristic of an auto focusing unit.
BRIEF DESCRIPTION OF THE DRAWINGS
"The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the disclosure and together with the description serve to explain the principle of the disclosure. In the drawings:
"FIG. 1 is a schematic cross-sectional view illustrating a camera module according to an exemplary embodiment of the present invention; and
"FIGS. 2 to 6 are schematic views illustrating a method of forming a light blocking layer on an outermost lens according to an exemplary embodiment of the present invention."
URL and more information on this patent application, see: PARK,
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SEPTEMBER 22, 2014
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