Abstract:
A planar light source device includes: a substrate having a thickness larger than 0.9 mm and including a metal layer; and a plurality of light-emitting diode chips disposed on the substrate in a matrix array. Each light-emitting diode chip has a chip size ranging from 0.0784 mm2 to 0.25 mm2. Two adjacent ones of the light-emitting diode chips are spaced apart from each other by a distance of at least two times a length of the light-emitting diode chips.
Abstract:
A broadband antenna includes a substrate having a first surface on which a first radiator arm, a second radiator arm, a first connecting conductor and a first grounding section are disposed, and a second surface on which a second connecting conductor and a second grounding section are disposed. The first connecting conductor has one end connected to a junction at which the first and second radiator arms are interconnected, and has another end connected to the first grounding section. The first connecting conductor has a feed-in point disposed thereon. The second connecting conductor has one end connected to the second grounding section. Moreover, at least a portion of the first connecting conductor overlaps with a projection of the second connecting conductor onto the first surface so that transmission directions of signals in the first and second connecting conductors are the same.
Abstract:
A sheet-fed double-sided document scanner is disclosed and includes a first image-capturing assembly, a second image-capturing assembly, a sheet-transporting mechanism, a power receiving interface, and a control circuit. The scanner switches scanning modes according to a power input. The sheet-transporting mechanism transports a document past the first image-capturing assembly and the second image-capturing assembly. The power receiving interface receives power. When a power level of the received power is less than a default threshold level, the control circuit controls the scanner to scan a first side and a second side of the document in a first mode. When the power level of the received power reaches the default threshold level, the control circuit controls the scanner to scan the first side and the second side of the document in a second mode.
Abstract:
An image capturing apparatus is provided for scanning documents, each of which has first and second pages of data. The image capturing apparatus includes first and second image sensors for reading the first and second pages of data of the documents. The method of capturing images includes scanning the m-th document and registering the first and the second image data in the first and second memories of one memory set and outputting the image data, wherein the value m has an initial value of 1; and increasing m by an increment of 1 when in the first and the second memories of at least one memory set are stored no image data or the first and the second image data are being completely output, and repeating the step of scanning the m-th document until the image capturing of all the documents is completed.
Abstract:
A sheet-conveying apparatus and a method for detection of the multifeed thereof are provided. The sheet-conveying apparatus includes a passageway, a sheet-transporting mechanism and a sheet-detecting device. The sheet-detecting device disposed in the passageway includes a first transmitter, a first receiver, a second transmitter and a second receiver. A first signal is transmitted from the first transmitter along a first transmitting path and received by the first receiver. A second signal is transmitted from the second transmitter along a second transmitting path and received by the second receiver. The second transmitting path is oblique to the first transmitting path. The sheet-detecting device further includes a control-process unit for determining if the condition of the multifeed has occurred in the sheet-conveying apparatus according to the variations in the first signal and the second signal respectively received by the first receiver and the second receiver.
Abstract:
A scanning device includes an input tray, an input path, an output path, an output tray, a first scanning head, a second scanning head and a sheet-transporting mechanism. The input tray stores a plurality of documents. The input path is connected to the input tray and the output path, and the output tray is connected to the output path. The first scanning head on the input path scans a backside of each document to output a backside image signal. The second scanning head on the output path scans a front side of each document to output a front side image signal. The sheet-transporting mechanism transports each document from the input tray to the output tray sequentially along the input path and the output path. The sheet-transporting mechanism transports each document in the input path in one direction and in the output path in a reverse direction.
Abstract:
A method for duplex scanning and generating corresponding images includes generating a first image by scanning a first side of a double-sided document, generating a second image by scanning a second side of the double-sided document, and eliminating background noise corresponding to the second side from the first image and background noise corresponding to the first side from the second image according to the first image and the second image.
Abstract:
In a multi-stage scanning method for increasing a scanning speed and enhancing an image quality, an optical module is firstly moved from a start position to a forward-internal position in a forward direction, and then enabled to scan a first portion of a document to obtain a first image until the module reaches a forward-boundary position. Then, the module is moved from the forward-boundary position to an end position in the forward direction. Next, the module is moved from the end position to a reverse-internal position in a reverse direction, and then enabled to scan a second portion of the document to obtain a second image until the module reaches a reverse-boundary position. Then, the module is moved from the reverse-boundary position to the start position, in the reverse direction, and then stopped. Finally, the first and second images are stitched into a complete image.
Abstract:
A scan device includes a body, a scanning module disposed in the body, a cover pivotably connected to the body, an optical sensor and a power supply controller. The body has a scan platen, on which a document may be placed. The optical sensor for receiving ambient light and correspondingly outputting an open-state signal is disposed on the cover or body. The power supply controller electrically connected to the optical sensor controls power supplied to the scanning module according to the open-state signal.