Abstract: A projection display device includes a lens module, a light source and an adjusting device. The lens module has a first lens and a second lens. The light source emits light through the first lens and the second lens to a surface. The adjusting device is used to change the distance between the first lens and the second lens, thereby adjusting brightness and uniformity of the projected pictures on the surface.

Abstract: The present invention relates a water-resistant structure for keyboard assemblies with enhanced water-resistant ability. A keyboard hood is provided with a plurality of first slant walls extending toward the keyboard base, a keyboard base is provided with a plurality of second slant wall extending toward the keyboard hood and in parallel with the first slant walls, and an elastic water-resistant sheet is provided with upward-extending slanted edges sandwiched between the first and the second slant wall so as to form a water-resistant structure when the keyboard assembly has been fabricated. The keyboard base is fastened to the keyboard hood by fastening screws passing through holes formed in the centers of bosses in the keyboard base and screwed into holes in protrusion portions formed as part of the keyboard hood.

Abstract: A rotary encoder able to produce a first output signal and a second output signal. The rotary encoder of this invention includes a rotary wheel supported by a frame. An elastic means disposed on the frame provides elastic force to the inside wall of the rotary wheel. A plate is mounted on and rotates with the rotary wheel, and there are a plurality of apertures arranged at a predetermined pitch circularly around an axis of rotation of the plate. An axial rod extends perpendicularly from the center of the plate. Pressure applied to the rotary wheel causes the elastic means to compress and shifts the axis of the wheel and plate such that axial rod contacts a switch and produces the first output signal.

Abstract: The present invention provides a cellular phone handset which can display a variety of special characters.

Abstract: The present invention provides a keyboard assembly, which comprises a plurality of key caps; a keyboard hood provided with a plurality of through holes for allowing the key caps to be insert thereinto, and a plurality of protrusions being formed on the top rim of each through hole; a plurality of dome-shaped elastic components disposed within the through holes of the keyboard hood, each dome-shaped elastic component having an upper rim and a bottom, the protrusions formed on the top rim of each through hole being higher than the upper rim of the dome-shaped elastic components disposed within the through holes; a circuit membrane disposed in a manner that it contacts with the upper rims of the dome-shaped elastic components; and a keyboard base fastened to the keyboard hood so as to enclose the end portions of the key caps, the dome-shaped elastic components, the circuit membrane, and the plate therebetween.

Abstract: An input/output connector adapted for a mobile electric device. The input/output connector includes a connector body and at least one pair of terminals. The connector body is exposed to the outside and having at least one pair of terminal holes. Each terminal hole is provided with an engaging block at a position adjacent to the outside respectively. A contact portion is formed at one end of the terminal, and an engaging portion is formed at the other end. Each engaging portion engages with the engaging block, and the opposing contact portions hold a printed circuit board of the mobile electric device. Therefore, the printed circuit board is capable of electrically communicating with the external electric device.

Abstract: An optical scanner for retrieving digital images of opaque and transmissive objects. The scanner of the present invention includes a scanner body, a docking port, and a removable scanning platform. An object to be scanned is placed on the scanning platform, which is subsequently loaded into scanner body for scanning. Inside the scanner body, a sensor module, including a first light source and an image-retrieving device, is disposed above the docked scanning platform; a support frame, on which is disposed a second light source, is disposed below the docked scanning platform. A connecting rod engages the sensor module and the support frame, and a driving device synchronously moves the sensor module and the support frame along a longitudinal axis. In a first embodiment, the scanning platform can include an adhesive tape for adhering an opaque object to be scanned to the surface of the scanning platform.

Abstract: An input/output connector adapted for a mobile electric device. The input/output connector includes a connector body and at least one pair of terminals. The connector body is exposed to the outside and having at least one pair of terminal holes. Each terminal hole is provided with an engaging block at a position adjacent to the outside respectively. A contact portion is formed at one end of the terminal, and an engaging portion is formed at the other end. Each engaging portion engages with the engaging block, and the opposing contact portions hold a printed circuit board of the mobile electric device. Therefore, the printed circuit board is capable of electrically communicating with the external electric device.

Abstract: A power supply for converting an inputted oscillating voltage into an outputted steady state voltage. The power supply includes a voltage converting circuit for converting the inputted oscillating voltage into a first steady state voltage, a transformer for transforming the first steady state voltage into a second oscillating voltage, a pulse generator for generating a pulse signal so as to control on and off of the transformer, a rectifying circuit for rectifying the second oscillating voltage so as to generate the outputted steady state voltage, and a feedback circuit for controlling a duty cycle of the pulse signal according to the outputted steady state voltage and an output voltage generated by a variable power source so that the outputted steady state voltage generated by the power supply can be controlled by the variable power source.

Abstract: The present invention relates to an image processing method for converting a gray-level image into a binary image by using an image processing system. The gray-level image comprises a plurality of gray-level pixels arranged in a matrix format. The binary image comprises the same number of binary pixels arranged in the same manner as the gray-level image. The image processing system comprises a memory for storing programs and the gray-level and binary images, and a processor for executing the programs stored in the memory. The image processing method comprises two steps. The first step is to examine the gray-level pixels of the gray-level image so as to locate and define gray-level pixels with boundary characteristics as boundary points according to a predetermined boundary determination method, and to define gray-level pixels next to each of the boundary points as neighboring points according to a predetermined neighboring point determination method.

Abstract: An apparatus and a method for compensating the gray-scale values of an image scanned by a contact image sensor. The gray-scale compensating apparatus includes: a power supply for providing a fixed level of voltage source, a contact image sensor for scanning an image and outputting image voltages VIMG of pixels of the image, or scanning a white pixel and outputting the white-level voltage VP of the white pixel, an analog/digital converter, to receive the fixed voltage from the power supply and the image voltage VIMG or the white-level voltage VP, a microprocessor to calculate the average of n white-level values G(x, y), where n is an integer, and the average value G′(x)=(G(x, 0)+G(x, 1)+ . . . +G(x, n−1))/n. The microprocessor also determines the gray-scale values g′(x, y) of the image being compensated by calculating the gray-scale values g(x, y) of the image not compensated in accordance with the value of G′(x).

Abstract: A case bordering structure for externally suspending a CD drive located at an inside wall of two lateral boards of the case for preventing an optical disk processing unit from swaying rearward. It includes a pair of stopping flanges and stoppers. Each flange respectively extends from the lateral board toward the interior of the case for engaging with a rear side of the optical disk processing unit. Each stopper is formed as a bulge adjacent to a rear end of the stopping flange for reinforcement of the stopping flange. The stopping flange and the stopper are integrally and unitarily formed with the case. The case bordering structure for externally suspending a CD drive in accordance with the present invention has a small number of components and may be produced with high yield at low cost.

Abstract: The present invention provides a cellular telephone with an auxiliary circuit board having a light source and a volume control module and comprising a horizontal main circuit board, an LCD (liquid crystal display) panel, a supporting frame, an auxiliary circuit board with a light source, a light guiding panel, and a zebra connector. In the production of the cellular telephone, no complicated soldering is required. In addition, the number of components are reduced and the general structure is improved and simplified.

Abstract: A method and device for preventing the jumping phenomenon of the OSD display region on a monitor screen. The anti-jumping device comprises it included a comparison circuit, a signal generator and a multiplexer. The comparison circuit is used for calculating a difference time between the front edges of pulses of the synchronizing signals Vs and Hs, and the front edge of a corresponding pulse, comparing the difference time with a fixed time and producing a selection signal according the comparison result. The selection signal represent the timing relation between Hs and Vs. The signal generator is used for generating two clear reference signals that can be applied in various timing situations. The multiplexer receives the two clear reference signal and employs the selection signal to select one of the two clear reference signal as a clear signal that is applied to a counter used for counting the scanning location in the OSD processing circuit.

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 →,←,↑,⇓ 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: The present invention relates to a flatbed scanner with both a top light source and a bottom light source which can be easily switched by using a top light shield to scan transparent documents and opaque documents. The scanner comprises a housing, a scanning module, a top cover, a top light source, and light shield. The housing comprises a transparent platform for placing a document. The scanning module is slidably installed inside the housing for scanning the document placed on the transparent platform. The scanning module comprises a bottom light source for emitting light upward toward the document and an image converter for converting an image of the document into a digital image. The top cover is movably installed on the housing. The top light source is installed under the top cover for emitting light downward toward the document when the top cover is placed on the transparent platform. The light shield is movably installed under the top cover for shielding the top light source.

Abstract: A circuitry for attaining a fixed raster vertical scan size of a video display apparatus is proposed. The video display apparatus comprises a flyback transformer (FBT) which includes a primary winding and a secondary winding. The secondary winding has a terminal generating a high voltage to an anode of a cathode ray tube (CRT) of the video display apparatus via an external loading. Moreover, the secondary winding has a voltage reference terminal. The raster vertical scan size adjustment circuit comprises a compensation circuit and a raster vertical scan size control circuit. The compensation circuit includes an input terminal adapted to connect the voltage reference terminal of the secondary winding for detecting voltage change at the voltage reference terminal responsive to variation of the external loading. The compensation circuit has an output terminal generating the compensated signal.

Abstract: A coupling device for coupling a cover to a platform body of a scanner. The coupling device comprises two legs for attaching to the cover; a pivot shaft formed between the distal ends of the two legal a stopper coupled to the pivot shaft at a first predetermined angle; a pivot socket formed at the intersection top surface of the platform and the platform sidewall comprising a cavity, two vertical slots formed in the sidewall of the platform and extending to and penetrating the top surface of the platform for respectively receiving the two legs into the cavity, a horizontal slot formed in the sidewall of the platform for receiving the pivot shaft into the cavity, an upper engaging portion, and a lower engaging portion.

Abstract: A scissors-type push button switch having slanted surfaces on top of first and second bearing slots that are integrated to the surface of a bottom base plate. The slanted surfaces are designed as such so that lateral cylindrical protrusions located on one end of a linking bracket can snap in the bearing slots in position with just a single push towards the base plate which reduces cycle time during the component assembly process. In particular, the first slanted surface and the spaced-apart second slanted surface, for guiding insertion, are slantingly recessed surfaces that tilt slightly towards each other and directly above the first and second bearing slots. In a second embodiment, the surfaces on top of the first and bearing slots are flat and the ends of the lateral cylindrical protrusions are chamfered to form slanted surfaces slanted away from each other.

Abstract: The power control apparatus in a display device including a button, a link bar and a power switch is provided. The monitor includes a bracket, a circuit board and a panel. The bracket includes a guiding slot. The button, which includes a first end and a second end, is located on the panel. The first end is provided to be accessed by a user. The link bar has a first end and a second end. The first end of the link bar contacts with the second end of the button such that the link bar moves responsive to movement of the button. The power switch, responsive to movement of the second end of the link bar, selectively applies a power supply to the circuit board. The link bar includes an engagement portion for engaging with and sliding longitudinally along the bracket. The link bar of the invention is easily installed and disjoined and does not occupy the space on the print circuit board.