Abstract: Disclosed are a method and an apparatus for an instant messaging service to provide a schedule service. A schedule management server according to an example embodiment includes receiving a schedule creating request, selecting any one of a first type of calendar belonging to a chatroom in which the schedule creating request is created and a second type of calendar belonging to a user account which creates the schedule creating request, according to a schedule type included in the schedule creating request; and creating a schedule corresponding to the selected type of calendar.

Abstract: Disclosed are a method and an apparatus for an instant messaging service to provide a schedule service. A schedule management server according to an example embodiment includes receiving a schedule creating request, selecting any one of a first type of calendar belonging to a chatroom in which the schedule creating request is created and a second type of calendar belonging to a user account which creates the schedule creating request, according to a schedule type included in the schedule creating request; and creating a schedule corresponding to the selected type of calendar.

Abstract: The present technology provides a controller for controlling a memory device comprising: a hard syndrome calculator configured to generate a hard syndrome of a hard data chunk received from the memory device; a delta syndrome calculator configured to generate a delta syndrome of a delta bit data received from the memory device, the delta bit data indicating a reliability of the hard data chunk; a soft syndrome generator configured to generate a soft syndrome of the hard syndrome and the delta syndrome; a data determinator configured to select, as hard decision data, one of the hard data chunk and a soft data chunk, the selected data chunk corresponding to a syndrome having a lowest syndrome weight; and an error corrector configured to perform an ECC decoding operation on the hard decision data.

Abstract: Disclosed is a light unit used for backlighting a display device such as an LCD panel, which emits perpendicularly-directed white surface light by using lateral monochromatic light. The light unit of the invention comprises: a monochromatic light source for emitting monochromatic light; a light guide plate placed at the side of the monochromatic light source, and having a hologram pattern formed on at least one of front and rear faces oriented perpendicular to incident light introduced from the monochromatic light source for emitting light in a direction substantially perpendicular to the incidence direction of light; and a fluorescent layer applied on the front face of the light guide plate for converting perpendicularly-directed emitted light into white light.