Samsung Electronics Co., Ltd.

Young-su Ryu

Min Woo Hong

Yong-Sik Kim

Hyoung-jo Jeon

Jae-hyun Jung

Ho-seok Choi

Jae-wan Kim

Jun-bo Kim

Myung-Ho Jung

Hwa-sub Shim

Joung-hag Kim

Sung-chai Kim

Seung-gun Byoun

Suk-in Yoo

Kyu-nam Choi

Heong-min Ahn

Jae-yeong Lee

A method of inspecting a flat panel display including inputting an image data signal into the flat panel display, obtaining an image displayed on the flat panel display in response to the input image data signal with a camera, extracting a raw brightness information corresponding to each location from the obtained image, calculating a fitting brightness information corresponding to each location through the curve fitting based on the raw brightness information, calculating a brightness difference corresponding to each location between the raw brightness information and the fitting brightness information, and detecting stain locations with the brightness difference beyond a predetermined permitted limit.

Method of inspecting a flat panel display

A coma aberration correcting apparatus of an optical pickup includes an optical pickup main body having a photo diode, and an actuator mounted on an objective lens focusing a beam emitted from the photo diode onto a recording medium. The coma aberration correcting apparatus includes a main supporting unit, a holding unit, an optical system, a driving part, and a controller. The main supporting unit detachably supports the optical pickup main body. The holding unit holds and releases the actuator on the optical pickup main body supported by the main supporting unit. The optical system magnifies and photographs the beam emitted from the photo diode through the objective lens of the actuator held by the holding unit. The driving part adjusts a position of the actuator relative to the optical pickup main body. The controller controls the driving part to correct the coma aberration of the objective lens.

Coma aberration correcting apparatus for optical pickup

Growing community of inventors

Suwon-si, South Korea

Young-su Ryu