Abstract: An optical communication module for optical wavelength division multiplexing includes a plurality of light devices emitting or receiving light beams having different wavelengths, a single optical fiber, and an optical elements arranged between the plurality of light devices and the single optical fiber and having a plurality of lens areas to converge a light beam starting from a single point at a plurality of points or light beams starting from a plurality of points at a single point. In the optical communication module, the plurality of lens areas are arranged such that the center points of the plurality of lens areas are located at the same distance from a point, and the single point and the plurality of points are located at the opposite sides with respect to the optical element.

Abstract: An optical communication module for optical wavelength division multiplexing includes a plurality of light devices emitting or receiving light beams having different wavelengths, a single optical fiber, and an optical elements arranged between the plurality of light devices and the single optical fiber and having a plurality of lens areas to converge a light beam starting from a single point at a plurality of points or light beams starting from a plurality of points at a single point. In the optical communication module, the plurality of lens areas are arranged such that the center points of the plurality of lens areas are located at the same distance from a point, and the single point and the plurality of points are located at the opposite sides with respect to the optical element.

Abstract: In a method and apparatus for transmitting a video signal, parallel digital video signals output from a graphic controller of a computer are transmitted to a driver of a cathode ray tube monitor by converting the parallel digital video signals to serial digital video signals, transmitting the converted serial digital video signals to the cathode ray tube monitor via a cable, converting the transmitted serial digital video signals to serial analog video signals, and inputting the converted serial analog video signals to the driver of the cathode ray tube monitor.

Abstract: In a docking system for a portable computer, the bus sharing structure between the portable computer and a docking station and the structure of the docking station are improved so that the real time execution of a program and the sharing of data and peripheral devices are possible.

Abstract: A docking system for a computer includes a portable computer having a first signal transmitting unit and a main computer having a second signal transmitting unit. The portable computer includes a read-only memory (ROM) wherein a first operating system is stored, a microprocessor, a memory wherein commands and data are stored, and a first docking controller for selecting an operating system according to the existence or non-existence of docking of the portable computer at the main computer. The main computer includes an auxiliary storage device wherein a second operating system is stored, a second microprocessor, a second memory wherein commands and data are stored, and a second docking controller for controlling the first and second microprocessors so that they are used simultaneously when the portable computer is docked at the main computer. The signal transmitting units control transmission and reception of data between the portable computer and the main computer.

Abstract: An apparatus for transmitting over optical cables a red image signal, a green image signal, and a blue image signal output from a personal computer, a clock signal indicative of the starting points of data frames of the image signals, an enable signal indicative of scan and blank periods of the image signals, a vertical synchronization signal and a horizontal synchronization signal. The apparatus includes a reference signal generator, a parallel-to-serial converter and a light signal generator. The reference signal generator generates a reference signal having predetermined data when the blank period starts in accordance with the enable signal. The parallel-to-serial converter converts the reference signal corresponding to the blank period and the image signals corresponding to the scan periods into serial signals.

Abstract: A display device includes a display portion for displaying an image, a main board for controlling an overall system, and a display portion driving circuit board for driving the display portion. The display device is driven by a serial digital video signal, a clock signal and a control signal transmitted through a cable from a computer. The signals transmitted through the cable from the computer are input to the display portion driving circuit board. The display driving circuit board includes a serial-to-parallel converter for converting an input N-bit packet of a serial digital video signal to an N-bit parallel digital video signal, and a frequency divider for dividing the frequency of the clock signal by N. The display portion is driven by the parallel digital video signal, the divided clock signal and a control signal. The main board controls the system by receiving the control signal via the display portion driving circuit board.

Abstract: A signal transfer apparatus of a computer. The signal transfer apparatus includes a substrate installed in a main system frame of the computer, a driving device installed on the substrate, for converting a video signal into a current signal, a semiconductor laser array for emitting light corresponding to the current signal from the driving device, an optical fiber bundle for transferring the light emitted from the semiconductor laser array to a display, a photo receiver array for converting the light transferred through the optical fiber bundle into a current signal, and a converter for converting the current signal output from the photo receiver array into a video signal.

Abstract: A computer display apparatus is provided, and more particularly, a display apparatus having a graphic card is provided. The computer display apparatus includes an image signal receiving apparatus for receiving graphic information generated in an advanced graphic port (AGP) of a computer system; a graphic card for processing graphic information input through the image signal receiving apparatus and generating an image signal; and a display unit for displaying the image signal generated in the graphic card. As described above, the display apparatus according to the present invention has a graphic card and an image signal receiving apparatus which receives graphic information generated in the AGP port of the computer system, and therefore the resolution of a displayed image can be adjusted in the display apparatus itself.

Abstract: A bidirectional light transmitting and receiving device includes a first light transceiver having a first light emitter and a first light receiver for receiving a light beam entering around the first light emitter, and a second light transceiver having a second light emitter and a second light receiver for receiving a light beam entering around the second light emitter, and signal transmission and reception between the corresponding first and second light device units is achieved through the same optical passageway. The bidirectional light transmitting and receiving device has a simple configuration because optical signal transmission and reception are achieved through the single optical passageway. The number of optical fibers required for the signal transmission and reception in the device is reduced by half, and thus the manufacturing cost also becomes lower.

Abstract: A video signal transmitting apparatus including a reproducing device which reproduces a video signal from a storage medium and has a plurality of channels, a plurality of image display devices for forming a picture according to the video signal, a switching portion for converting a video signal reproduced by the reproducing device to an optical signal and distributing the optical signal to each of the image display devices, a plurality of optical cables for transmitting an optical signal between the switching portion and the image display devices, and a controller for controlling the reproducing device and the switching portion.

Abstract: An assembly structure for a display of an electronic appliance is provided. The electronic appliance includes a main body and a display for displaying an image according to an image signal input from the main body so as to facilitate the attachment and detachment of the display to and from the main body. The assembly structure includes a fitting device formed at the main body and the display. The fitting device has a fitting member which slidably fits into a fitting hole. An optical connector is provided between the main body and the display to be attached to the main body for transferring an image signal using light beams for the display.

Abstract: A data transmission method which maintains the direct current (DC) balancing of each channel and compensates for the skew between channels when digital video data made up of graphic data, control data and clock data is transmitted in series via channels allocated to the data, and a data receiving method, a data transmitter and a data receiver, are provided. In this method, the disparity representing the degree of the direct current (DC) balancing of the graphic data is calculated whenever the graphic data is transmitted. The calculated disparities are accumulated whenever the graphic data is transmitted. Scrambling is performed in which, when the accumulated disparity does not amount to the predetermined critical value, the received graphic data is transmitted without change, and when the accumulated disparity amounts to the predetermined critical value, the received graphic data is inverted.

Abstract: Disclosed is an optical connector module for being connected between first and second devices for receiving and/or outputting electrical information signals, and being capable of converting input electrical signals to optical signals, transmitting the converted signals and again converting the transmitted optical information signals into electrical information signals.

Abstract: A light transmission module for transmitting a light signal through an optical fiber coupled to a light device and/or receiving a light signal transmitted through the optical fiber is provided. The light transmission module includes a light device module having a socket member having a plurality of leads for transmitting an electrical signal, and a light device installed within the socket member to be electrically connected to the leads, for converting the electrical signal into a light signal or converting the light signal into an electrical signal, a connector module having a holder coupled to the socket member, and at least one optical fiber installed in the holder to face the light device, for transmitting the light signal, and a coupling means for slidably coupling the light device module and the connector module and packaging the same.

Abstract: A connection assembly of a computer and a port replicator for distributing a plurality of signals generated from the computer to each of a plurality of peripheral devices. The connection assembly includes a first optical connecter installed at the computer for transmitting input signals using light, a second optical connecter installed at the port replicator to correspond to the first optical connecter for transmitting input signals using light, and a portion for coupling the first and second optical connecters to communicate with each other. Thus, since the first and second light-receiving/emitting units are disposed to be separated a predetermined distance from each other and exchange information signals, the reliability with respect to connection can be maintained when the port replicator is repeatedly connected and disconnected to and from the computer. Also, EMI can be reduced by replacing the pin and pin holder with the first and second light-receiving/emitting units.

Abstract: An optical pickup includes at least two vertical cavity surface emitting lasers (VCSEL) disposed adjacent to each other on the same substrate for emitting light having different emission angles, a light path converter for converting the travel path of incident light, an objective lens for focusing incident light to form an optical spot on an optical recording medium, and an optical detector for receiving light which is reflected by the optical recording medium and passed through the objective lens and the light path converter. The optical pickup selectively drives one of the VCSELs so that disks of different thicknesses can be compatibly adopted, and high efficiency of light can be secured.

Abstract: A hologram optical pick-up device using a first and second laser sources emit laser beams having different wavelengths, which are then focused by an objective lens on a disc, and reflected at a surface of the disc. The reflected laser beams are diffracted by a first hologram or a second hologram, and then received by a first photo detector or a second photo detector. Accordingly, a laser beam having an adjustable wavelength according to a thickness and a recording surface of the disc is emitted by the first laser source or the second laser source in order compensate the aberration of the laser beam due to the thickness of the disc. Thereby, the same hologram optical pick-up device can reproduce data from discs having different recording surfaces without loss of data. Also, the hologram optical pick-up can record and reproduce data on/from any disc with an increased efficiency of the laser beam.

Abstract: A light emitting apparatus having a surface emitting laser including a substrate, a first reflection layer, an active layer and a second reflection layer stacked successively on the substrate, first and second electrodes formed respectively on the lower surface of the substrate and a portion of the upper surface of the second reflective layer, to emit light in the direction of the stacked layers, and a monitoring photodetector stacked on the second reflection layer to detect the amount of the emitted light from the surface emitting laser, is provided. The monitoring photodetector includes first semiconductor material layer, an absorbing layer and second semiconductor material layer stacked successively on the second reflection layer, a third electrode formed on the second semiconductor layer to output detecting signals of the monitoring photodetector, and a controlling layer formed on the bottom of the absorbing layer to intercept some of the incident light.

Abstract: An optical pickup is provided which detects information contained in an optical disk. The optical disk includes a light source, a hologram device, an objective lens, a photodetector, and a single chip. The light source is formed of a first vertical cavity surface-emitting laser (VCSEL) diode and emits a light beam. The hologram device converts the light beam emitted from said light source into a polarized parallel light beam and diffracts a reflected parallel light beam reflected from said optical disk to produce a diffracted beam. The objective lens focuses the polarized parallel light beam on said optical disk and converts a corresponding reflected beam into the parallel reflected beam. The photodetector is formed of a second VCSEL diode and detects various characteristics of the diffracted beam. Finally, the light source and the photodetector are integrated on the chip.