摘要:
A scanning optical system deflects a light beam by a reflection surface of a polygon mirror toward an object surface through an image forming optical system so that the light beam scans on the object surface to form an image thereon. A light shielding member is disposed between the polygon mirror and the image forming optical system. The shielding member is an opaque plate disposed perpendicular to the optical axis of the image forming optical system. The light shielding member prevents a ghost light that is reflected by another reflection surface of the polygon mirror located adjacent to the reflection surface deflecting the light beam from entering the image forming optical system and impinging onto the object surface.
摘要:
A multi-beam scanning device includes a light source for emitting a plurality of laser beams, a polygon mirror for deflecting the laser beams so that the laser beams scan across an object surface in a main scanning direction, an fθ lens disposed between the polygon mirror and the object surface, and a cylindrical lens that converges each laser beam in a vicinity of the polygon mirror in the auxiliary direction. A mirror is disposed between the light source and the cylindrical lens which deflects the laser beams in the auxiliary scanning direction. The mirror is rotatably supported by a mirror holder such that the traveling direction of the laser beams deflected by the mirror can be adjusted.
摘要:
When a computer is not externally powered, it operates from installed first and second batteries. In top surface of the computer, LEDs are provided which indicates three states of each battery; need of charging, during charging, and completion of charging.
摘要:
A personal computer, wherein a setup processing is performed to select a display mode, either a normal-display mode or a reverse-display mode, and also to select one of the external devices such as a printer and an external floppy disk drive. Also, a display auto-off mode and a display auto-off period are set during the setup processing. A period is measured during which no data is input from a keyboard. When the measured time value exceeds the display auto-off period, the supplement of power to the back light is stopped automatically.
摘要:
A computer has a conversion module for converting a password to be registered into a compressed-bit row in accordance with a predetermined rule. A registration module stores the compressed bit row of the registered password in a backup RAM. A conversion module converts a password to be compared with the registered password into a compressed bit row. A comparison module compares the compressed bit row of the compared password with the compressed bit row of the registered password. Upon detecting a coincidence between the two compressed bit rows, a system activation module is activated to set the system to a access allowable state.
摘要:
Upon detecting removal of a display section from a computer unit's main body, dismounting a battery, removal of a memory board from the computer unit's main body or the like, the CPU saves system data no matter whether or not the resume mode is on and turns off the main power supply. Subsequently when the power switch is turned on the CPU checking if said system data is saved. The CPU restores said system data and restarts the data processing in case where the preservation of said system data is detected.
摘要:
An electronic apparatus has a plurality of operating systems. The apparatus includes a setting unit which preselects a program to be displayed or recorded under control of a first operating system, and a notifying unit which makes a notification as to whether the setting unit preselects the program while an application program is being executed under control of a second operating system.
摘要:
In a computer to which an external ten-key pad is connectable, whether or not the external ten-key pad is connected to the computer is detected. When the external ten-key pad is not connected, the overlay keys in the keyboard body function as letter keys or numeric keys depending on whether the computer is set in an NL state. When the external ten-key pad is connected, the overlay keys function as letter keys only.
摘要:
In a computer system to which externally- and internally-set hard disk drives can be coupled, a drive number is set to the externally-set hard disk drive and/or internally-set hard disk drive in accordance with a coupling state of the externally- and internally-set hard disk drives and a swithing state of a dip switch of the externally-set hard disk drive. When the externally-set hard disk drive and/or internally-set hard disk drive are/is coupled to the computer system, pop-up menu data for the externally-set hard disk drive and/or internally-set hard disk drive is added to the normal pop-up menu data. A pop-up menu is therefore displayed using the normal pop-up menu data including the pop-up menu data for the externally-set hard disk drive and/or internally-set hard disk drive.
摘要:
A portable computer that includes a first ROM for storing an OS, a second ROM for storing at least one piece of existing application software, and a flat display panel for displaying at least one icon to read out the existing application software stored in the second ROM. Since the DOS and the application program are respectively stored in a DOS ROM and an application ROM, the DOS or the application can be quickly executed without install processing from floppy disks.