Abstract: A scanner module with adjustable magnification ratio includes a photo-mechanical body, a charge-coupled device module and a pressing device, such as a wedge element or an adjusting screw. The photo-mechanical body is arranged along an optical distance and has a first plane vertical to the direction of the optical distance. The charge-coupled device module is arranged along the direction of the optical distance in the photo-mechanical body and has a second plane vertical to the optical distance and facing to the first plane. The pressing device is supported by the second plane and vertical to the first plane, for enabling the charge-coupled device module to move back and forth along the optical distance. Therefore, the magnification ratio of the scanner module can be adjusted through the length of the optical distance.

Abstract: An image-sensor emulating device establishing a link with a host system by using peripheral interface bus. The image-sensor emulating device emulates the functions of image-sensors by programmably generating the relevant image-sensor and timing signals. Alternatively, the timing signals can also be generated from the timing signals outputted by an outside image-sensor. Therefore, the emulating device can generate predetermined image-sensor signals and timing signals such that the debugging process is simplified and the developing efficiency is improved. Moreover, the emulating device according to the present invention can also generate a timing signal serving as a reference timing signal for emulating an image-sensor. The reference timing signal can be used to compare with the actual timing signals of an image-sensor.

Abstract: An automatic method detects missing lines occurred in an image, thereby identifying possible internal problems in the scanner. The method comprises the following steps. First, from the image of a slanting line, the pixel having gray levels closest to the median value of the predetermined highest gray levels and set a fault tolerance value are identified. Then the pixel as (Xi,Yj). Then, the gray levels of the pixels on (Xi,Yj) and (Xi−1,Yj+1) are compared. If the gray-level difference between these two pixels is larger than the fault tolerance value, the occurrence of a missing line is determined. To determine the total number of missing lines on that row, the gray levels to check if (Xi−2,Yj+1)≦(Xi,Yj)<(Xi−1,Yj+1) are compared. If not, the shift index k is incremented by one repeatedly until the gray-level difference is correspondent to the predetermined comparison condition.

Abstract: The present invention relates to a method and apparatus for displaying subtitles by a multination language human-machine interface that having small memory space occupation and conveniently for program maintenance. First of all, a character database is been edited, and in accordance with the character size to edit the bitmap file for each individual character. The bitmap file is then transferred to 80c51xa assembly language and stored in the character database. Then, the “string code”, the “string combination code and position shifting code”, and the “string combination code of multination language and position shifting code” of the controlling program are established, and the content of the character database is been called. During a practical usage, the desired string is been called by the controlling program, then carried out the language judgement of the exercising nation.

Abstract: An image scanner having an improved scanning quality is disclosed. Two different color blocks having an interface therebetween are provided on the document platform of the image scanner. The image pickup device passes by the color blocks prior to the document area so that color calibrations and/or error detection can be performed before the scanning operation is performed. By this way, the color data such as the brightness of the obtained image can be compensated, and the deflection rate and/or the amplification error of the image pickup device can be corrected.

Abstract: The present invention provides a control method for moving and positioning multiple lens of a scanner to their accurate position. The method mainly uses a linear reference image, such as a calibration paper with some marks in the scanning range, taken by a specific lens to a CCD for verifying if the lens is well positioned according to a decision rule. The lens is controlled to move to its correct position by the continuous feedback signals from the CCD, so the accuracy and reliability of the positioning can be kept without being influenced from any worn-out of frequent movements of the mechanism.

Abstract: An automatic cooling mechanism for an electrical device having a high-temperature element and a rolling shaft is provided. The mechanism includes a fan mounted within the electrical device; and a rotation transmission and variation mechanism connected between the fan and the rolling shaft for variationally transmitting rotational kinetic energy from the rolling shaft to the fan.

Abstract: The present invention discloses an apparatus and a method for detecting the scanning range when applying the assistant frames in the flatbed scanners. Fixed marks allocated at the front side of the assistant frames are used to determine the sizes of the assistant frames. The required scanning ranges are thus determined according to the recognized assistant frames obtained from pre-scan. Only the front sides but whole of the assistant frames need to be pre-scanned, and thus to reduce the scanning time interval.

Abstract: A method and structure for coupling to a step motor shaft is characterized by providing a predetermined back-lash distance defined between the step motor shaft and a key, thereby to instantly reach the desired speed for driving a load. Accordingly, a shaft coupling device is provided to connect to a rotatable load. The shaft coupling device has a key which maintains a back-lash distance defined between a step motor shaft and the key. Eventually, when the step motor shaft is not driving the load, they are separated. When the step motor shaft is driven by the step motor, it self-spins in a first direction and travels through a distance so as to form a predetermined back-lash distance between the key. As soon as the back-lash distance is formed, the step motor shaft reverses its rotation direction and then starts to travel through the predetermined back-lash distance to drive the load. The speed of the step motor shaft soon increases as it rotates in a second direction and approaches the load.

Abstract: An alignment pad is set in front of the image sensor. A lens is set between the alignment pad and the image sensor. The alignment pad includes a set of boundary alignment patterns. At least one sets of resolution analysis patterns are formed on the alignment pad. Each set of the resolution analysis pattern includes a horizontal analysis resolution pattern and a vertical resolution analysis pattern. The horizontal analysis resolution pattern is consisted of a plurality of vertical lines to analyze the horizontal resolution of the lens. The vertical resolution analysis pattern is consisted of a plurality of oblique lines to analyze the vertical resolution of the lens. The signals detected by the image sensor is fed to an application specific integrated circuits (ASIC) to generate a collation data. Subsequently, the collation data is fed into a buffer to store the data. A computer is responsive to these signal, and displays the collation data on the monitor in gray mode for collation.

Abstract: A fast and effective method and an apparatus are provided for obtaining relative and absolute magnifying factors in the transverse and longitudinal directions to improve the scanning quality.

Abstract: The present invention provides a scanner having an image pickup module which comprises a transparent groove over its scanning surface for scanning a document and also reducing sticking effect when a document with viscous membrane such as a photo picture is carried through the scanning surface of the image pickup module. The scanner comprises an image pickup module and a document roller for rotatably carrying a document through the image pickup module. The image pickup module comprises a housing having a scanning surface, a light source and an elongated light sensor installed inside the housing under the scanning surface. The scanning surface has a line-shaped scanning position parallel to the light sensor. When a document is carried through the scanning position, the light reflected from the document over the scanning position will be received by the light sensor.

Abstract: A method adapted for distinguishing an object scanned by a transmissive/reflective scanning device for as a transmissive object or a reflective object. The scanning device includes a transmitting light source and a reflecting light source. The method includes the steps of (a) turning on one of the light sources, (b) scanning a first portion of the object to obtain a first image signal by using the light source turned on int the step (a), (c) calculating a first scanning value of the first image signal, (d) turning off the first light source turned on in the step (a) and turing on the other light source, (e) scanning a second portion of the object to obtain a second image signal by using the light source turned on in the step (d), (f) calculating a second scanning value of the second image signal, and (g) comparing the scanning values to distinguish the object to be one of the transmissive object and the reflective object.

Abstract: A method is provided for distinguishing an object to one of a transmissive object and a reflective object used in a transmissive/reflective scanning device. The scanning device includes a transmitting light source and a reflecting light source. The method includes steps of (a) lighting up one of the transmitting light source and the reflecting light source, (b) scanning a portion of the object by using the lighted light source to obtain an image signal, (c) calculating a scanning value of the image signal, and (d) distinguishing the object to be one of the transmissive object and the reflective object according to the scanning value of the image signal.

Abstract: The present invention provides a resolution adjustment method for adjusting the resolution of a scanning module. The scanning module is installed in a scanner for scanning a document and comprises a case with a line-shaped opening on its top for receiving light from the document, a sensor installed in the case and comprising linearly arranged sensing units for scanning the light from the document and generating correspondent image signals, a lens installed in the case for converging the light from the document to the sensor, and a mirror module installed in the case for passing the light from the document through the lens to the sensor. The resolution adjustment method provides the scanning module with a calibration picture for generating a calibration image which comprises two groups of parallel lines in two directions for calibrating the resolutions of the sensor in the two different directions.

Abstract: A locking mechanism for fixing a carriage at a specific position automatically is provided. This locking mechanism includes a fixing device and a transmitting device. The fixing device is used for securing the carriage at the specific position, and the transmitting device is used for driving the carriage to be secured to the fixing device in a first instance and detaching the carriage from the fixing device in a second instance.

Abstract: The present invention discloses a flatbed scanner that utilizes a single dynamic source to support dynamic for both the light source projection device and the image generation device. The dynamic generated by the single dynamic source is respectively dispatched to the light source projection device and the image generation device through two separate transmission paths for scanning.

Abstract: The present invention relates to a scanning method of an image scanning system for scanning a plurality of designated areas. The system comprises a transparent platform having front, rear, left and right ends for placing documents, and a scanning module for scanning the designated areas within the platform in a front-to-rear direction.

Abstract: A scanner with transmission-mode scanning function for scanning an article to obtain an electronic signal. The scanner includes a housing, a scanning window having a first side and a second opposite side, a moving carriage having therein an image-picking device and mounted at the first side of the scanning window, and a combining device which includes a guiding path, a first luminous body mounted at the second opposite side of the scanning window for providing a first optical signal, and a linking device connected to the moving carriage and to the first luminous body to enable the moving carriage and the first luminous body to be synchronously moved along the guiding path.

Abstract: A cover assembly having a cover member and a plurality of articulated links is disclosed. One end of each link is pivotally mounted to a recessed region of a housing body and an opposed end of the link is pivotally mounted to extending legs of the rigid cover member. Articulated movement of the cover assembly enables the cover member to assume a substantially parallel disposition relative the platen regardless of the thickness of document. Another feature of the invention allows the rigid cover to remain substantially vertical in its fully raised position. The engagement of top portions of the links and flat areas on rear wall of the cover member between the extending legs stops the cover from pivoting towards the backs of the links.