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Chia-Chun Chang, Tu-Cheng TW

Chia-Chun Chang, Tu-Cheng TW

Patent application numberDescriptionPublished
20090170402APPARATUS AND METHOD FOR GRINDING THREADED PORTION OF WORKPIECE - An apparatus for grinding a threaded portion of a workpiece, is provided. The threaded portion has a spiral groove formed therein. The apparatus includes a motor, a grinding cord, a detector and a controller. The motor has a rotary portion for rotating the threaded portion of the workpiece about an axis. The grinding cord is configured for being looped around the threaded portion of the workpiece with a middle part thereof engagingly received in a given portion of turns of the spiral groove for grinding the thread portion of the workpiece. The detector is for detecting a rotating cycle of the rotary portion. The controller is communicatively coupled to the detector for controlling the rotary portion to selectively rotate in a first rotating direction or in a reverse second rotating direction based on the received signal from the detector.07-02-2009
20090303617APERTURE STOP AND MANUFACTURING METHOD THEREOF - An aperture stop includes a body and a black film. The body is stainless steel and the black film is disposed on at least two corresponding ends of the body. A manufacturing method of the aperture stop is also provided. The aperture stop is produced using the characteristics of the stainless steel body.12-10-2009
20100046239LAMP HOUSING - A lamp housing includes a top plate and sidewalls. The top plate includes a first edge, a second edge, a first group of top-plate dissipation slots and a plurality of second top-plate dissipation slots. The first edge is opposite to the second edge. Each top-plate dissipation slot has the same width, and is rectangular. Each one of the plurality of first top-plate dissipation slots is separated by two widths thereof, and each of the plurality of second top-plate dissipation slots is separated by two widths thereof. The plurality of first top-plate dissipation slots is parallel and 20 to 24 slot widths away from the first edge toward the center of the top plate, and the plurality of second dissipation slots is parallel and 14 to 18 slot widths away from the second edge. A plurality of sidewall dissipation slots is provided on the sidewalls.02-25-2010
20100272848INJECTION MOLD - An injection mold for molding a lens barrel is disclosed. The injection mold includes a female die, a male die and a screw die. The female die and the male die are correspondingly connected to two ends of the screw die. The female die, the male die and the screw die cooperatively define a mold cavity. The female die includes a female die plate and a female die core protruding from the female die plate. The male die includes a male die plate and a male die core protruding from the male die plate. The male die defines a through hole passing through the male die plate and the male die core. An air gap is formed between the distal ends of female die core and the male die core, the air gap is communicated with the mold cavity and the through hole.10-28-2010
20100328793LENS MODULE - A lens module includes a lens barrel and a lens holder. The lens barrel includes a barrel. The barrel includes an outer surface and an outer thread portion formed on the outer surface. The lens holder includes a main body. The main body defines a receiving space to receive the lens barrel. An inner thread portion matching the outer thread portion is formed on an inner surface of the receiving space. The angle between the outer surface of the lens barrel and an optical axis of the lens module is different from the angle between the inner surface of the receiving space and the optical axis of the lens module.12-30-2010
20110001862CAMERA MODULE - A camera module includes a lens barrel assembly and a lens holder. The lens assembly includes a lens barrel and a lens received in the lens barrel. The lens include an optical axis. The lens barrel defines a recess in a sidewall of the lens barrel. The barrel holder includes a peripheral sidewall, an inner flange formed on an inner surface of the peripheral sidewall, and a protrusion extending from the inner flange. The peripheral sidewall of the barrel holder is threadedly engaged with the lens barrel. The protrusion extends in a direction parallel to the optical axis and is inserted in the recess.01-06-2011
20110058265FIXED-FOCUS LENS MODULE - A fixed-focus lens module includes an outer lens barrel, an inner lens, a first lens, and a second lens group. The outer lens barrel includes a first open end, a first cavity, and a second open end arranged in the order from the object side to the image side of the outer lens barrel. The inner lens barrel is received in the outer lens barrel adjacent to the first open end. The first lens is received in the inner lens barrel. The second lens group is received in the outer lens barrel adjacent to the second open end. An gap is defined between an outer wall of the inner lens barrel and an inner wall of the outer lens barrel at the first open end, and the center axis of the inner lens barrel is adjustable relative to the outer lens barrel for adjusting the alignment between the first lens and the second lens group.03-10-2011
20110075013LENS ASSEMBLY AND CAMERA MODULE HAVING SAME - A lens assembly includes a first lens and a second lens. The first lens includes an optical axis, and a first engaging face facing toward the optical axis and a first engaging structure formed on the first engaging face. The second lens is used for engagement with and coaxially alignment with the first lens. The second lens includes a second engaging face facing away from the optical axis and a second engaging structure formed on the second engaging face for engagement with the first engaging structure of the first lens. The second lens is rotatable about the axis but non-movable along the optical axis relative to the first lens when the second lens is engaged with the first lens.03-31-2011
20110102373OPTICAL PEN AND OPTICAL TOUCH DEVICE HAVING SAME - An exemplary optical pen includes a body, an infrared light source received in the body, a converging lens unit, and a tip. The converging lens unit is received in the body and is positioned along the light path of infrared light emitted from the infrared light source, and is configured for converging the infrared light. The tip includes a receiving end and a handwriting end at opposite sides thereof and defines a through hole extending from the receiving end to the handwriting end. The receiving end is received in the body and is configured for fixing the converging lens unit. The handwriting end protrudes from the body and is configured for projecting the converged infrared light.05-05-2011
20110150459CAMERA MODULE - A camera module includes a lens barrel, a first lens and a second lens. The lens barrel includes a substantially cylindrical inner wall. The first lens is received in the lens barrel. The first lens includes a first circumferential side surface spaced from the inner wall. The second lens is engaged with the first lens and received in the lens barrel. The second lens includes a second circumferential side surface. The second circumferential side surface has a first portion contacting the inner wall and a second portion spaced from the inner wall, thus a gap defined between the second portion and the inner wall. Adhesive is applied in the gap between the second portion and the inner wall.06-23-2011

Patent applications by Chia-Chun Chang, Tu-Cheng TW