Abstract: A speaker unit for an earphone includes a frame including an internal accommodation space; a low-frequency diaphragm; a low-frequency voice coil of a tubular structure connected to the low-frequency diaphragm; a center magnet disposed at the center of the low-frequency voice coil; a first ring-shaped magnet disposed between the center magnet and the low-frequency voice coil; a second ring-shaped magnet disposed on an outer side of the low-frequency voice coil; a high-frequency voice coil disposed on an outer side of the center magnet and including a tubular structure; a flexible substrate disposed on an outer side of the high-frequency voice coil; a coil fixing plate having a plate-shaped structure with one side being coupled to the high-frequency voice coil and another side being coupled to the flexible substrate; and a high-frequency diaphragm disposed above the coil fixing plate and configured to vibrate.

Abstract: A computer system includes a device which transmits data through a predetermined interface and outputs first recognition information in response to a predetermined power on self test (POST) control signal, a device controller which has second recognition information about whether the device is mounted, and a system controller which outputs the POST control signal to the device when powering on, and recognizes the device on the basis of the first recognition information and the second recognition information.

Abstract: A computer system includes a device which transmits data through a predetermined interface and outputs first recognition information in response to a predetermined power on self test (POST) control signal, a device controller which has second recognition information about whether the device is mounted, and a system controller which outputs the POST control signal to the device when powering on, and recognizes the device on the basis of the first recognition information and the second recognition information.

Abstract: A computer system includes a device which transmits data through a predetermined interface and outputs first recognition information in response to a predetermined power on self test (POST) control signal, a device controller which has second recognition information about whether the device is mounted, and a system controller which outputs the POST control signal to the device when powering on, and recognizes the device on the basis of the first recognition information and the second recognition information.

Abstract: A computer system, a disk storage device and a method of controlling the same reads data by a reading size from a disk storage unit in which the data is stored according to a request of an application for reading data. The data is divided from the reading size into a size allocated by the application and stored in a memory region which the application accesses.

Abstract: A computer system includes a device which transmits data through a predetermined interface and outputs first recognition information in response to a predetermined power on self test (POST) control signal, a device controller which has second recognition information about whether the device is mounted, and a system controller which outputs the POST control signal to the device when powering on, and recognizes the device on the basis of the first recognition information and the second recognition information.

Abstract: An apparatus and a method to test a computer system, wherein the apparatus to test a computer system includes: a computer system interface module to receive one or more power on self test (POST) codes from a computer system; a control module to search, or determine, error information corresponding to the last received POST code, of the one or more received POST codes, where a new POST code is not received during, or after elapse of, a critical, or predetermined, time period; and a display module to display the searched error information.

Abstract: A computer system with a display is provided to effectively prevent an unwanted user from accessing the computer system. The computer system has a password storage device to store a plurality of password request sentences and a plurality of passwords corresponding to the respective password request sentences, and a controller to randomly select and display at least one of the plurality of password request sentences on the display and to perform a system booting procedure when an input password is identical to the password corresponding to the displayed password request sentence.

Abstract: A computer providing a trace image booting password to control access to the computer. The computer includes a sensing plane; a sensor unit sensing a moving sensed unit contacting the sensing plane; an image generator generating a trace image along the movement of the sensed unit as sensed by the sensor unit; and an image storage storing a predetermined image password based upon a predetermined image. The computer further comprises a controller displaying the predetermined image on a display screen at a booting time of the computer to allow a user to move the sensed unit in contact with the sensing plane over the displayed predetermined image, comparing a trace image generated by the image generator along the moving trace of the sensed unit by the user with the stored image password, and booting the computer if the generated trace image corresponds to the stored image password.

Abstract: A method and an apparatus for confirming a power off signal generated by the aligning of a power switch into an off position. The operator can select from four options prior to the power to the computer system being terminated. This should improve the efficiency of document product ion, and reduce the amount of data lost due to accidental power terminations.

Abstract: A method and an apparatus for confirming a power off signal generated by the aligning of a power switch into an off position. The operator can select from four options prior to the power to the computer system being terminated. This should improve the efficiency of document product ion, and reduce the amount of data lost due to accidental power terminations.