Abstract: A compact zoom lens includes first, second, third, and fourth lens groups sequentially arranged from an object side. The first lens group includes a first lens and at least one reflection optical component and at least the third lens group moves during zooming. The zoom lens satisfies a condition that 0.22?ST3/OL?0.25 where “ST3” is the distance of movement of the third lens group from a wide angle position to a telephoto position and “OL” is the overall length of the zoom lens. The compact zoom lens embodies a folding type inner zoom to reduce the thickness and the length of the zoom lens so it is suitable for use in digital cameras as well as personal mobile devices.

Abstract: Disclosed is a zoom lens optical system. The optical system includes a first lens group, which is fixed and has a total reflection prism, the prism turning an optical axis from an object side to an image side, and the first lens group having a positive lens power, a second lens group having a negative lens power, a third lens group having a positive lens power; and a fourth lens group having a positive lens power. The first through fourth lens groups are sequentially arranged from the object side to the image side, and the fourth lens group is fixed while magnification variation is executed by moving the second lens group and the third lens group.

Abstract: Disclosed herein is a method for compressing an image using a permissible-error (PE) encoding method and a dynamic link-size encoding method. An image compression efficiency can be increased by selectively applying the permissible-error encoding method and the dynamic link-size encoding method to a zero loss compression method, for example, a Lempel-Ziv compression method.

Abstract: An apparatus and method for managing a memory in a mobile communication terminal. The apparatus enables a user to freely store user data without limiting user data types or the number of the user data by adopting a file system inside of a mobile communication terminal, and allows the user to selectively store data as needed by the user. The apparatus generates the user data as a file in case of storing the user data in the memory, stores the file in the memory, and provides a user interface to the file such that the user gains access to the file in file units or deletes the file in file units.

Abstract: Disclosed herein is a method for compressing an image using a permissible-error (PE) encoding method and a dynamic link-size encoding method. An image compression efficiency can be increased by selectively applying the permissible-error encoding method and the dynamic link-size encoding method to a zero loss compression method, for example, a Lempel-Ziv compression method.

Abstract: Disclosed is a system that allows the user of a computer having a plurality of integrated monitors controlled by A one central processing unit (CPU) to adjust the display controls of the individual monitors with a single display adjustment key switch set. The display adjustment system includes a body, a plurality of monitors integrated with the body, an analog digital (AD) board, and an input. The AD board includes a display adjustment key switch set and an on-screen display (OSD) controller for the user to selectively adjust the display controls of the individuals monitors, and the OSD controller is built in the body. The display adjustment key switch set, formed as a set of buttons is mounted outside the body for the user to adjust the display controls by pressing the buttons.

Abstract: Disclosed is a computer having one body integrated with multiple displays, and more particularly, a computer that has at least one display integrated or associated with one body to enable angle control, thereby providing the best angle of vision for users and especially for realizing multitasking and multimedia. The computer having one body integrated with multiple displays comprises a computer body including a main board, a CPU, a hard disk, a memory, a graphics processor or modem, and a display section that is integrally provided on one side of the computer body. The display section includes at least one display that is controllable in position.

Abstract: A computer system comprises a plurality of a graphic data output units for displaying the graphic data to a user, a plurality of graphic data processors for analyzing the graphic data and converting them into data that fit the graphic data processors' output-formats; a first graphic data controller for receiving the graphic data, setting a graphic data processor according to control signals, and providing the corresponding graphic data to the set graphic data processor; a control signal input unit for generating the control signals for setting by what graphic data processor the corresponding graphic data are to be processed; an application program storage unit for storing application programs; and a CPU for driving the application programs, receiving graphic data generated when driving the application programs, receiving the control signals from the control signal input unit, and outputting the graphic data and the control signals to the graphic data controller.

Abstract: A method for managing a schedule as a supplementary function of a mobile communication terminal. The method is capable of efficiently managing schedule information such as anniversaries to be repeated every year. Further, the method is capable of conveniently making contact with another party by providing telephone numbers of the other party at the same time when the schedule information is provided to a user.

Abstract: Provided are an apparatus and method for manufacturing a current collector for a secondary battery. In the current collector manufacturing method, a current collector source material is first prepared, pre-treated and then passed between rollers, one of which has patterns shaped like openings to be formed in the source material to then coat a pattern forming composition. Then, the resultant is dried and etched to form the openings, thereby completing the current collector. The current collector manufacturing apparatus includes a main roller, a guide roller coupled to the main roller so that the current collector passes therebetween, and a pattern forming composition storage unit, installed under the main roller, for supplying the pattern forming composition to a patterned portion.

Abstract: Disclosed is an advertisement access history recording system which comprises a user authentication server for determining whether the user who accesses an advertisement providing web site logs in to the advertisement providing web site, and storing the user's personal information; a web server for managing the advertisement providing web site for storing a selection of the advertisement, execution of the selected advertisement, computation of run time of the selected advertisement and run time of the computed advertisement run time in the user authentication server; and an advertisement data server for storing the advertisements provided by the advertisement providing web site. According to the present invention, the sponsor can accurately know data such as the number of the users and advertisement run time.