Abstract: A device, system and method for transmitting one or more of annotations and video prior to a video call is provided. A communication device receives a request for a video call from a first communication device, of other communication devices. Prior to the video call being established, the communication device: determines whether a user of the first communication device is an authorized caller; and when the user of the first communication device is an authorized caller, transmits, to the first communication device, one or more of annotations received at the input device and video from a video camera. The determination of whether a user of the first communication device is an authorized caller is based on profile data associated with users of one or more of the other communication devices.

Abstract: A developing unit provided in an image forming apparatus includes a regulating member that improves developer layer regulation performance. The developing unit is configured to feed developer to a photoconductor, on which an electrostatic latent image is formed, to form an image. The regulating member of the developing unit includes a bending portion contacting an outer peripheral surface of a developing device provided in a frame of the developing unit. The width of the regulating member is variable to increase rearward from the bending portion. The regulating member may further include an extension portion extending from the bending portion. Sealing members may be attached to both ends of the frame of the developing unit so as to contact the respective ends of the bending portion.

Abstract: A method for manufacturing a polarizer sheet includes: preparing a light transmission film where a metal thin film is formed, and forming metal patterns by irradiating a polarized pulse laser beam onto a plurality of regions of the metal thin film.

Abstract: A backlight unit capable of enhancing a luminance of an LCD is provided. The backlight unit includes a lamp for emitting light, a light guide plate for guiding the light emitted from the lamp, and an optical sheet disposed on a path of the light emitted from the light guide plate. The optical sheet includes a prism sheet having a plurality of prisms of which apex angles are obtuse, and a reflective polarizer film for reflecting and transmitting the light emitted from the prism sheet according to polarization components.