Abstract: An optical path folding apparatus of the present invention receives an incident light and reflects a reflection light on a lens set. The optical path folding apparatus comprises a first portion receiving the incident light and reflecting a first light beam, a second portion receiving the first light beam and reflecting a second light beam, a third portion receiving the second light beam and reflecting a third light beam, a fourth portion receiving the third light beam and reflecting a fourth light beam, a fifth portion receiving the fourth light beam and reflecting a fifth light beam, and a sixth portion receiving the fifth light beam and reflecting a reflection light on the lens set. In a preferred embodiment, the first portion and the fifth portion are coplanar on a first mirror, while the second portion, the fourth portion and the sixth portion are coplanar on a second mirror.

Abstract: An adjustable liquid crystal display device comprises a liquid crystal display (refers to LCD), a light source, a first polarizer, and a second polarizer. The LCD has a light-receiving surface and a light-emitting surface, and shows the image and the characters. The light source emits a light toward the light-receiving surface of the liquid crystal display. The first polarizer locates between the light source and the LCD, and converts the light into a polarized light that can pass through the LCD. The second polarizer locates on the same side with the light-emitting surface of the liquid crystal display.

Abstract: A backlight device that includes a transparent substrate, a plurality of protrusions, a first layer of transparent material, a second layer of transparent material and a light source. The protrusions are provided on the substrate. The first layer of transparent material is attached to the substrate. Also, the first layer of transparent material has an index of refraction smaller than the substrate. The second layer of transparent material is attached to the first layer of transparent material, while the second layer of transparent material has particles inside. The light source emits light. The light is scattered by the protrusions, propagates through the substrate and the first layer of material, propagates into the second layer of material, is scattered by the particles of the second layer of material, and then propagates out from the backlight device.

Abstract: A collapsible keyboard that includes a base, at least one hinge and a plurality of keys. The base has a plurality of sections. The keys are provided on the sections of the base. The hinge connects the plurality of sections so that the sections are rotatable with respect to each other, allowing collapsibility of the keyboard to facilitate transport.

Abstract: The present invention relates to a brushless motor system. The brushless motor system has a brushless motor, a motor driver, and at least one sensing circuit. The brushless motor has a rotor, and the sensing circuit is used to detect the rotor position. The sensing circuit has a Hall sensor and two capacitor devices. The Hall sensor has two output ports. As the rotor rotates, the Hall sensor will generate a sensing signal at each of the two output ports. Each of the capacitor devices is connected in series to one of the two output ports of the Hall sensor, and the two capacitor devices are used to filter out DC biases in the two sensing signals. The motor driver is connected to the two capacitor devices for driving the rotor of the brushless motor according to the two sensing signals from the two capacitor devices.

Abstract: A media feeding mechanism mainly comprises a base provided with a first surface and a second surface, a first roller, a second roller, a first one-way bearing used to support the first roller, a second one-way bearing used to support the second roller, a cam gear and a stopper. To prevent media from wrinkling or skewing, the media transmitted by the first roller is deskewed by contacting with the idled second roller for a predetermined period of time. The first roller 11 is idled when the deskewing process concludes. Rotation of the second roller clockwise scrubs the media toward the exit point.

Abstract: A projector having a projection system includes a reflecting projection unit. The projection system has an image display device and a projection lens, which is provided with an optical axis. The reflecting projection unit includes a first mirror and a second mirror. The first mirror reflects an image from the projection lens according to a predetermined angle. The second mirror receives the image from the first mirror, and reflects it onto a screen. The invention has the advantages of increasing image offset and the zoom ratio of the projector.

Abstract: A portable communications device has a housing with a circuit board set within the housing. An I/O connector has an interface connector that mounts on the housing. The interface connector thus has internal and external sides. Conductors on the external side present an I/O interface for an external device. These conductors have corresponding contacts on the internal side. The contacts on the internal side make electrical connections with contacts set on an edge of the circuit board.

Abstract: The feeding mechanism for feeding media from an initial site to a predetermined site comprises a base, a scrubber, a deskewer, two feeders, a lifting device having two cam portions, a driving element and a releasing device. The deskewer is moved between a first position and a second position and sets the media located at the initial site. The two feeders are used for transmitting the media located at the initial site toward the predetermined site. The cam portions are used as a lifter to move the deskewer from the first position to the second position. The driving element disposed between the lifting device and the releasing device generates forces to actuate the cam portions to move the deskewer. The releasing device is used as an overload protection clutch connected between the lifting device and the driving element, having a first plate separately contacting the driving element.

Abstract: The push-button switch has a base plate, a circuit membrane, a key cap, a scissors-type linkage and a resilient element. The scissors-type linkage having a first linking bracket and a second linking bracket is disposed between the circuit membrane and the key cap and movable along a specified path. The resilient element is mounted on the scissors-type linkage so as to move the key cap and the scissors-type linkage back to the initial state as the force applied on the key cap is released. The scissors-type linkage is provided with a guiding portion thereon, and the resilient element has a trigger, which is actuated by the guiding portion and used to trigger the switch as the key cap is fully pressed. The resilient element also can be a V-shaped reed connected to the first linking bracket and the second linking bracket, or the resilient element can be a spring connected to the first linking bracket and the second linking bracket.

Abstract: A computer keyswitch with accurately positioned rubber domes. The computer keyswitch includes a base plate, a membrane circuit board installed on the base plate, and a rubber sheet positioned on the membrane circuit board. The membrane circuit board has a plurality of pressure sensors. The rubber sheet has a plurality of upwardly protruding rubber domes each above a corresponding pressure sensor, and a plurality of rubber pegs around each of the rubber domes. The base plate and the membrane circuit board have a plurality of fastening holes positioned corresponding to the rubber pegs. The rubber pegs will engage with the fastening holes to accurately position the rubber domes of the rubber sheet on the pressure sensors of the membrane circuit board.

Abstract: An automatic locking apparatus for a movable module in a device uses device's weight and position to lock the movable module. It includes an input unit located on a bottom wall of the device to detect if the device is positioned on a support plane under a normal state, a transfer unit for receiving input from the input unit to generate a response, and an output unit for receiving the response to actuate a lock or unlock action on the movable module. When the input unit detects the device being properly positioned on the support plane, the transfer unit will be triggered to make the output unit disengaged with the movable module for normal operation. When the input unit detects the device being removed from the support plane at an abnormal state, the transfer unit will be triggered to make the output unit locking the movable module inside the device at a selected location.

Abstract: An I/O connector has a housing with front, rear and top openings. Set within the housing is a monolithically formed latch. This latch has first and second tines. The first tine has a notch at its front end for engaging with an appropriate locking niche on the portable communications device, and a button at its back end. The button protrudes through the top opening of the housing, and the front ends of the tines protrude through the front opening of the housing. By pressing on the button, the first tine is depressed towards the second tine, which unlocks the I/O connector from the locking niche. The second tine is slightly longer than the first tine to ensure that the first tine stays locked within the locking niche.

Abstract: A method for automatically aligning a charge coupled device of a scanner by using a software contained in the scanner instead of physically aligning the charge coupled device is disclosed. The scanner comprises a charge coupled device (CCD) having an array of optic sensors for converting a reflected line image into an analog signal array, an analog-to-digital (A/D) converter for converting the analog signal array into an image data array, and a test region having a positioning mark in it. The method comprises the following steps of: (1) generating an image data array which comprises the image of the test region in it by using the CCD and the A/D converter; (2) identifying the positioning mark from the image data array; and (3) setting an effective scanning range which defines the start and stop positions of valid image data within the image data array according to the identified positioning mark.

Abstract: A control grid voltage generating circuit comprises a high voltage source, a low voltage source and an amplifier biased by the high/low voltage sources. The high voltage source is coupled to the ground through a low-impedance path. The amplifier receives an input signal and generates a control grid voltage in response to the input signal. When the CRT is powered off, the amplifier can be rapidly discharged via the low-impedance path, thereby speedily turning off the amplifier. The control grid voltage is then driven to be the low reference voltage, thereby cutting off the electron beam and protecting the CRT.