Abstract: A paper pressing device for a scanning apparatus is provided, which include a scanning module and a paper track corresponding to the scanning module, wherein the paper track is provided for a paper sheet passing through. The paper pressing device includes a film and a pressing block. The film is disposed on one side of the paper track opposite to the scanning module. The pressing block is disposed on one side of the film opposite to the scanning module and presses against the film for reducing the height of the paper track above the scanning module. When the paper sheet is passes over the scanning module, the paper pressing device presses the paper sheet for maintaining the paper sheet flat while being scanned.

Abstract: A paper feeding mechanism for carrying a paper passing through a scanning station having a scanning module includes a partition, a paper transporting device, and a switching member movably disposed corresponding to one end of the partition. A first paper feeding channel is formed between the partition and the scanning station, and a second paper feeding channel is formed on another side of the partition. The paper transporting device carries the paper passing over the side of the partition through the first paper feeding channel with a first page of the paper facing the scanning module. Then, the paper is flipped for a second page of the paper facing the scanning module. The switching member can be selectively moved for guiding the paper passing through the first paper feeding channel or the second paper feeding channel.

Abstract: A system and method for demodulating amplitude modulated input signals uses two comparators and a charge pump circuit, which is positioned between the two comparators, to produce a demodulated signal of an amplitude modulated input signal. The two comparators and the charge pump circuit form a demodulating unit that may be a part of an infrared remote control receiver. The first comparator converts the input signal from a waveform to a pulse form. The charge pump circuit then converts the pulse signal into an integrated signal in a triangular pulse form. The second comparator converts the integrated signal from a triangular pulse form to a rectangular pulse form to produce the demodulated signal.

Abstract: A method for improving print quality by using lossless image compression (JPEG-LS) technology and system thereof are provided. The detailed characteristics of prediction errors generated during lossless image compression encoding or decoding process are retrieved and fed back to a halftone print mode of the printer and are used to adjust the halftone print mode.

Abstract: An automatic document feeder for electric equipment includes an input tray, a driving mechanism, and a block mechanism. The input tray has a receiving end, a discharge end, and a first path extending from the receiving end to the discharge end. The driving mechanism includes a separating-roller shaft disposed above the input tray and in proximity to the discharge end, and a separating roller sleeved fixedly on the shaft. The blocking mechanism includes a blocking member pivotable between a blocking position whereat the blocking member is disposed on the first path, and a non-blocking position whereat the blocking member is removed from the first path. A driven arm is connected to and co-rotatable with the separating-roller shaft so as to pivot the blocking member between the blocking position and the non-blocking position.

Abstract: A portable electronic product with a Qwerty keyboard has a single display for reducing the manufacturing cost and a Qwerty keyboard for inputting data more conveniently. The portable electronic product includes a housing, a Qwerty keyboard mounted in the housing and a display. The Qwerty keyboard is exposed to a bottom surface of the housing and has an outer surface that is lower than the bottom surface of the housing. The display is assembled on a top surface of the housing and has a side edge that is partially or fully mounted with one edge of the housing pivotally. Therefore, the display is able to swivel relative to the housing. When the user needs to input data, the display can be turned to a position that simultaneously faces to the user with the Qwerty keyboard.

Abstract: An optical receiver has a voltage supply, a first node, and a second node. A first input of a differential amplifier is coupled to the first node and a second input of the differential amplifier is coupled to the second node. A photodetector is coupled between the voltage supply and the first node, which produces a photodetector capacitance. A programmable variable capacitor having a capacitance selectively matched to the photodetector capacitance is coupled between the voltage supply and the second node.

Abstract: A thin MFP includes a scanning module, a printing module, a paper advance module, a paper switch module and a paper-guiding module all disposed in a casing thereof. Both the scanning module and the printing module are fixed on the same plane. The paper advance module has a first paper advance box and a second paper advance box for guiding paper into the casing, respectively. The paper switch module mates with the paper advance module for selectively guiding paper from the first paper advance box or the second paper advance box. The paper-guiding module mates with the paper switch module for guiding paper from the paper switch module to the scanning module for scanning or to the printing module for printing. Whereby, the size of the thin MFP is reduced by changing the disposition of the scanning module and the printing module and sharing the paper-guiding module.

Abstract: An image noise reduction method in frequency domain is provided, comprising selecting a first image and applying a Fourier transform thereon to acquire a first frequency spectrum, wherein each pixel of the first frequency spectrum has a real part X and a imaginary part Y, calculating a first energy of each pixel and a first mean energy of all first energies of the pixels, calculating a first mean value and a first standard deviation of the real part of the pixels, calculating a second mean value and a second standard deviation of the imaginary part of the pixels, determining a first and a second predetermined values, when the first energy exceeds the first mean energy, the first and second predetermined value are replaced with X and Y, and when the first energy does not exceed the first mean energy, X and the Y are reserved.

Abstract: A book scanner for scanning two adjacent pages in documents bound in volume includes a housing, two image scanning units, and a conveying device. The housing has two scanning tables connected to each other. An included angle is formed between the two scanning tables and a crest line is formed at a connection of the two scanning tables. The two image scanning units are movably disposed in the housing to project a scanning light through a window of each scanning table respectively, so as to scan images of the two adjacent pages. The two image scanning units are connected to the conveying device to be supported and moved relative to the corresponding scanning tables in a direction parallel to the crest line, so as to be moved simultaneously and to scan the images of the two adjacent pages respectively.

Abstract: A print control module for a thermal printer includes a housing, a transmission device, a first driving mechanism, a second driving mechanism, and a power switching mechanism all installed in the housing. The transmission device includes a motor, and a transmission gears set for transmitting power of the motor. When the motor rotates in a first direction, the power switching mechanism transfers power of the motor to the first driving mechanism, and when the motor rotates in a direction opposite to the first direction, the power switching mechanism fixes the first driving mechanism and transfers power of the motor to the second driving mechanism.

Abstract: A power converter includes: a transformer controlled by a main switch to receive an input power according to a driving signal; a switching circuit outputting a sync signal; and a driving circuit including a dead time controller that includes first and second switches operating according to the sync signal, and an inverse phase generator that includes third and fourth switches and that generates a switching signal. A circuit switch of the switching circuit operates according to the switching signal. Transition of the driving signal from high to low causes the switching signal to transition from low to high with a dead time between a falling edge of the sync signal and a rising edge of the switching signal. Transition of the driving signal from low to high causes the switching signal to transition from high to low with a dead time between a falling edge of the switching signal and a rising edge of the sync signal.

Abstract: A dual-band dipole antenna includes two radiating arms and a short-circuited element. The two radiating arms and the short-circuited element are formed monolithically. Each radiating arm has a feed-in end and a radiating end. Each radiating arm has a slot that divides the radiating arm into a first radiating portion and a second radiating portion. The resonant frequencies of the first radiating portion and the second radiating portion are different to radiate/receive wireless signals in two frequencies respectively. The short-circuited element is connected to the feed-in end of each radiating arm, so as to electrically connect the two radiating arms. The short-circuited element also makes an included angle formed between the two radiating arms, so as to obtain the effect of dipole gains of the radio waves transferred or received by the two radiating arms.

Abstract: A light guide for a keypad includes a plurality of through hole portions adapted to correspond respectively to keys on the keypad. Each of the through hole portions is adapted to receive at least a part of the corresponding key, and to receive light incident thereinto from at least one light source. Each of selected ones of the through hole portions has a contour with a non-curved contour portion that includes a light incident face and a reflecting face forming an angle with the light incident face. Light incident on the reflecting face is reflected into at least one other through hole portion. The light guide can also be configured to have a tree-like structure.

Abstract: An automatic paper feeding apparatus used in an electronic apparatus including a tray frame, a tray body, a paper-taking roller, at least a wiggling device and a frictional roller is provided. The tray body can move into and out from the tray frame. The paper-taking roller moves the top paper by rotating along a rotating direction. The wiggling device wiggles toward the paper-taking roller from an initial position. When the paper-taking roller moves the top paper, the frictional roller faces the paper-taking roller and contacts the top paper by the same frictional surface. When the tray body moves out the tray frame, the frictional roller rotates and causes the other frictional surface of the frictional roller to face the paper-taking roller substantially. When the tray body moves into the tray frame, the wiggling device wiggles toward the paper-taking roller from the initial position and wiggles back to the initial position.

Abstract: A cushion unit includes a frame having a plurality of corners, and a plurality of reinforcing corner plates respectively disposed in the corners. Each reinforcing corner plate has two main portions angled to each other to form a substantially L-shape, and two wing portions projecting respectively from the main portions. Each corner has two adjacent corner wall sections respectively formed with first engaging grooves for engagement with the wing portions of the respective reinforcing corner plate. The main portions of the reinforcing corner plates are disposed respectively on inner sides of the corner wall sections of the corners when the wing portions of the reinforcing corner plates engage respectively the first engaging grooves in the corner wall sections.

Abstract: A computer case retention structure includes a cover and a base. The base has a bottom plate and a guided way with a protruding hook. The cover has at least one side plate, a first and second elastic blades are disposed on the side plate. A protrusion is extended downward from a tip of the second elastic blade to slide against the guided way. For fixing the cover onto the base, the protrusion slides over the protruding hook and then stopped by the protruding hook, so that the cover is fixed onto the base without being moved relative to the base. For removing the cover, a release element disposed on the first elastic blade is pressed to bend the first and second elastic blades, separating the protrusion from the guided way. Then the cover can be removed from the base without the protrusion being stopped.

Abstract: An ink cartridge and loading mechanism for ink cartridge are provided. A mounting structure is formed on one side of the ink cartridge. The loading mechanism includes a loading section, a gear set, and a lever set. The loading section has lateral walls and a deck. The gear set is located on one of the lateral walls and has a spur gear and a pinion gear engaged to each other. The spur gear has at least one protrusion inserted into the mounting structure of the ink cartridge. The lever set is connected to the pinion gear for driving the gear set. Therefore, the gear set may change the torque of the protrusion. Then the protrusion may be coupled with the mounting structure to suppress the ink cartridge downward, or to lift the ink cartridge to be removed.

Abstract: A system switches the display screen of an idle web video conferencing device to a digital frame. If there is no video conferencing signal coming into a VoIP phone, its display interface is used as a digital frame. The system includes a display to display the video conferencing image sent by another party over the Internet and outputting a digital frame image when it is idle; a medium processing device including an audio/video (AV) decoder for processing the video conferencing AV signals and an image decoder for processing digital pictures; a switch control device for switching between the AV decoder and the image decoder, achieving the goal of converting between the video conferencing AV and the digital frame image.

Abstract: A paper feeding apparatus including a paper pickup roller assembly, a paper conveying roller assembly, a one-way driving assembly, and a reverse driving assembly is provided. The one-way driving and the reverse driving assembly are connected to a driving device, such as a motor, wherein the one-way driving assembly is engaged with the paper pickup roller assembly only in one direction to drive the paper pickup roller assembly forward as the driving device rotates forward and stop driving the paper pickup roller assembly as the driving device rotates backward, and the reverse driving assembly is provided for driving the paper conveying roller assembly to constantly rotate forward for conveying the paper sheet to move forward no matter whether the driving device rotates forward or backward.