Abstract: A keyswitch including a keycap, a switch element, a rubber sheet, a housing, a balance lever is provided. The switch element, responsive to the reciprocal movement of the keycap, selectively turns ON. The rubber sheet is disposed on the switch element. The housing includes a pair of hook devices. The hook device and the housing constitutes a slot. A opening is provided on the housing at location corresponding to the hook device. The balance lever includes a longitudinal portion connected to two traverse portions forming an "U" shape. The end of the traverse portion is disposed into the slot corresponding to the hook device. A protrusion is provided integrally on the rubber sheet at location corresponding to the hook device. The protrusion passed the opening and contacts with the end terminals of the traverse portions of the balance lever to lower the noise.

Abstract: A keyboard assembly capable of protecting the circuit membrane or other internal circuitry in the keyboard from being damaged by water flowing in from the key seats and from the bolt holes.The keyboard assembly of the invention utilizes a water-resistant sheet, which covers the circuit membrane mounted on the base of the keyboard body and is surrounded by a sealing flange.

Abstract: The present invention relates to an image displaying device which can control the usage of the image displaying device according to some predetermined time-related events. The image displaying device comprises a screen for displaying an image frame, an image display circuit for displaying image signals on the screen to form the image frame, a clock circuit for generating clock signals containing time of day information in it, a control circuit for controlling usage of the image display circuit according to the clock signals, and an on-screen display circuit electrically connected between the control circuit and the image display circuit for displaying a warning message on the screen through the image display circuit to prevent the image display circuit from normally displaying the image signals on the screen.

Abstract: The invention provides a removable retain apparatus for a disc within a disc player. When the disc player of the type is disposed horizontally and the retainer is not needed any more, the user may easily disassembly the removable retainer. The disc player has a tray within which a cavity is provided to accommodate the disc and the cavity defines a circumference along which a plurality of grooves on the tray and each corresponding removable retain apparatus is provided. The removable retain apparatus includes a disc holder, a pivot pin and a elastic device. The pivot pin has a cap portion and a root portion. The disc holder has a predetermined thickness and has a shaft inserted within one corresponding groove located along the circumference defined by the cavity. The shaft has a first slot running through the thickness of the disc holder and a second slot disposed at a predetermined angle with respect to the first slot.

Abstract: A monitor shell includes a frame detachably and horizontally mounted to a seat, which is attached to the bottom of a metal housing for holding a cathode-ray tube. A circuit board is mounted on the detachable frame so that it is not necessary to detach the metal housing when repair or maintenance of the circuit board is needed.

Abstract: A method for positioning the initialization position of a light source for an image reading apparatus operated under a passing-light mode is provided. A platen including a reference area that provides a pattern disposed at a position x is provided. The method comprises a first step of positioning the scan model at the position x in order to read the pattern within the reference area. Secondly, the method moves the light source toward the reference area and, at the same time, triggers the scan module to scan the image. Thirdly, repeat the second step until the image scanned by the scan module meets a pre-determined criterion. Fourthly, the method makes the light source module further move a distance of .DELTA.D-.DELTA.d. The .DELTA.d is the distance traveled by the light source during an interval which begins at the capture of the pattern by the scan module and ends at the determination of the pre-determined criterion as being met.

Abstract: A device for receiving a memory card of a portable telephone set. The memory card-receiving device includes a memory card chamber being pivoted onto the transceiver of the telephone set. An engaging mechanism is provided to engage the memory card chamber when it is inserted into an open slot, which is an opening, cut in from the end surface and the side surface. An ejector is also provided for ejecting the memory card-receiving device when the memory card chamber is disengaged.

Abstract: A monitor base comprising a standing member and a movable member is disclosed. The standing member has a coupling member, while the movable member has an opening through which the coupling member is movably connected to the movable member, and a guard member provided in the opening to prevent the coupling member and the movable member from separating. The movable member is moved relative to the standing member with the coupling member constrained by the opening.

Abstract: A device for enhancing and shielding the light emitted from a rod-shaped light source. The device includes a plate strip made of light-reflecting material or provided with light-reflecting means disposed between the rod-shaped light source and a holder for holding the rod-shaped light source along the longitudinal axis direction thereof. The plate strip has an inwardly curved edge extending from the two ends thereof to the center. The width of the plate strip is gradually tapered from the two ends to the center.

Abstract: A keyboard comprising a plurality of Alpha-Numeric keys, a plurality of Direction keys and a Backspace key, a Delete key or a Enter key is provided. The plurality of Direction keys includes .fwdarw.,.rarw.,.uparw.,.dwnarw. keys to form an area of Direction keys. The Backspace key, a Delete key or a Enter key is disposed adjacent to the area of Direction keys for allowing a user's fingers to move between Direction keys and Backspace key, a Delete key or a Enter key without moving the palm.

Abstract: A supporting mechanism for scanning module comprises a supporting bracket for mounting a scanning module thereof Two end portions of the top surface of the supporting bracket are provided with a roller respectively. When the supporting bracket moves longitudinally, the rollers rolls along a bottom surface of a glass plate when a biasing force is exerted to the supporting bracket. The supporting mechanism further includes a biasing device moveably supported by a supporting runway at one end. The biasing device provides a horizontal and a vertical biasing force to the supporting bracket respectively. The supporting bracket is in close contact with a longitudinal reference surface due to the horizontal biasing force exerted thereon as the supporting bracket moves longitudinally. The clearance between the scanning module and the bottom surface of the glass plate is kept substantial constant by the vertical biasing force exerted to the supporting bracket when it moves longitudinally.

Abstract: This invention relates to a circuit board mounting apparatus with inverted U-shaped mounting arms for mounting a circuit board. The circuit board mounting apparatus comprises a base for loading the circuit board above it, two front end latching mechanisms installed on the base for removably and horizontally latching the front end of the circuit board, a supporting mechanism installed on the base for supporting the approximately center portion of the circuit board upward, and at least one inverted U-shaped mounting arm installed on the base having one open end facing downward. The open end of the mounting arm comprises an engaging means for engaging the rear end of the circuit board to prevent it from moving upward.

Abstract: The push button switch provided includes a housing, a key cap, an elastic actuator, and a membrane switch layer. The housing has a key top guide integral with the housing, and two slots are provided at the vicinity of the key top guide. The key top has a cap and two deformable hooks. The cap has a bottom surface, and a plunger is provided and extends from the bottom surface. The two deformable hooks are provided and extend from an edge of the cap. Each deformable hook corresponds to one of the slots and is disposed within the corresponding slot. The plunger is slidably disposed within the key top guide, which allows a reciprocal movement of the key top with respect to the housing. The actuator has an elastic dome and a deformable sheet membrane integral with the elastic dome. The elastic dome supports the plunger and deforms responsive to the reciprocal movement of the key top. The membrane switch layer is disposed underneath the actuator.

Abstract: A dual screen displaying device for displaying two NTSC video signals on the left and right sides of a monitor is disclosed. The displaying device comprises two tuners for receiving wireless signals from an antenna and generating two video signals V1 and V2, two digitizing circuits for digitizing the video signals V1 and V2, a control circuit for merging the outputs of the two digitizing circuits, a digital-to-analog converter for converting the merged digitized signals back to a combined video signal, and a display control circuit for displaying the combined video signal. Asynchronous condition may happen when displaying different fields of the two video signals V1 and V2 in the same time. And the control circuit uses a storage method which controls the storage of a specific field of the video signal V2 or a data retrieval method which controls the retrieval of a specific field of the video signal V2 to solve the asynchronous problem.

Abstract: The present invention relates to a radio transceiver having a plurality of switchable antennas. The radio transceiver comprises (1) a housing, (2) a dipole antenna installed on the housing for transmitting and receiving radio signals, (3) at least one patch antenna installed on the housing for transmitting and receiving radio signals, each patch antenna being connected to an antenna switch, (4) an impedance matching circuit connected to the dipole antenna and each said antenna switch, (5) a transceiver circuit connected to the impedance matching circuit for converting radio signals received by the antennas into base band signals and converting base band signals to be transmitted into radio signals, (6) and mode control means for controlling each said antenna switch and the impedance matching circuit to match the impedance of the impedance matching circuit with the connected antennas.

Abstract: A method of modifying the display aspect and the display position as the display mode of a computer system changes. In this present invention, a plurality of display parameter sets are previously provided. Each display parameter set, dedicated to one of the predefined display modes, at least includes the front porch times and the back porch times of the horizontal synchronizing signal and the vertical synchronizing signal. Using these previously prepared display parameters and the transmission between the computer and the monitor, the monitor can be set to be proper timing corresponding to a new display mode.

Abstract: A cover for covering a recessed portion of the case of a computer monitor. The cover includes a cover strip, a first engaging protrusion and a second engaging protrusion. The first engaging protrusion and the second engaging protrusion can be engaged with a first aperture and a second aperture formed in the recessed portion.

Abstract: An ejector apparatus of a tray device is provided. The tray device movably seats within the space of an electronic equipment. The ejector apparatus includes a support and an ejector. The support has a attachment apparatus adapted to mount on a chassis of the electronic equipment. The ejector pushes the tray device out of the electronic equipment in response to a force applied from the outside of the electronic equipment. The ejector is pivotally connected to the support.