Other

Umax Data Systems, Inc.

Transpacific IP Limited

Shih-Huang Chen

Shih-Zheng Kuo

Ben Min-Jer Lin

Chun-Jen Chen

Yin-Chun Huang

Chuan-Yu Hsu

Wen-Tso Tseng

An optical module with movable reflective mirrors is provided in the invention. The optical module, which is set in a scanner for the scanning of documents, comprises the following elements: a first carriage comprising a first reflective mirror, a lens and a photoelectric sensing device, wherein the first carriage moves along the scanning direction to scan the document to be scanned; a second carriage comprising a second reflective mirror, a lens and a photoelectric sensing device, wherein the second carriage can make relative movement corresponding to the first carriage along the scanning direction; and a third carriage comprising a third reflective mirror, a lens and an photoelectric sensing device, wherein the third carriage can make relative movement corresponding to the first carriage along the scanning direction. Of which, the first carriage is situated between the second carriage and the third carriage with the distance between the second carriage and the third carriage being fixed at a constant value during the course of scanning, while the image light of the document to be scanned forms an image on the photoelectric sensing device via the focusing of the lens after having been reflected via the first reflective mirror, the second reflective mirror, and the third reflective mirror sequentially.

Optical device with movable optical module

A circuit of a scanner to perform a color space conversion on an RGB signal. The circuit has several sampling-amplified-offset devices to sample, amplify and compensate potential of an R charge signal, a G charge signal and a B charge signal to obtain an R analog signal, a G analog signal and a B analog signal. The circuit further has a gain adder to multiply the corresponding weighted gain with the R analog signal, the G analog signal and the B analog signal. The multiplication results are then summed up to obtain an addition analog signal. A multiplexer is also included to select between the R analog signal, the G analog signal, the B analog signal and the addition analog signal for output.

Circuit scanner to perform color space conversion on RGB signal

Circuit of scanner to perform color space conversion on RGB signal

A scanning apparatus of the invention comprises a scanning module that is slidably mounted to a guiding structure, and a scanning platform where is placed a document sheet to be scanned. The guiding structure includes a first track portion and a second track portion that oppositely face the scanning platform. Thereby when the scanning module is located on the first track portion, it captures the image of the front side of the document sheet. When the scanning module is located on the second track portion, it captures the image of the reverse side of the document sheet.

Scanning module movement process and guiding structure therefor

A CMOS light sensor and the operation method thereof are disclosed. The CMOS light sensor has a plurality of light sensing lines and a plurality of capacitor lines. Each light sensing line has a plurality of light sensors such that the number of capacitors in each capacitor line is smaller than the number of light sensing cells in each light sensing line. The capacitors are used for holding a portion of the potentials produced by the light sensing cells due to illumination. The method of operating the CMOS light sensor includes transferring the data captured by the light sensing line to the capacitor line and reading out the data according to a pre-defined order so that the leakage of charges from the capacitor is reduced.

CMOS light sensor with the quantity of light sensing cells along a line is more than the quantity of corresponding capacitors and operation method thereof

CMOS light sensor and operation method thereof

A method for reading sensor that stores data in numerous separate memory cells, such as 1-D linear sensor or 2-D sensor composed of some 1-D linear sensor. To read the sensor, initially receiving a parameter which is a positive integer N, then skipping some former memory cells, finally starting to read following memory cells behind the (N&#x2212;1)th memory cell.

Method for reading sensor

Optical module with movable carriage having mirror

Apparatus for reducing exposing time of an image processing system is disclosed herein. The image processing system including a shift register coupled to a photo-sensing means, the photo-sensing device is used to convert an optical image from a lens to a plurality groups of charge to form an electrical signal. The apparatus includes control device (counter) and a reset gate. The control device generates the first reset signal and the second reset signal depending on whether the image processing system is in a first resolution mode or a second resolution mode. A first number of cells of the photo-sensing device are exposed to the light of the optical image during the first resolution mode, and a second number of cells of the photo-sensing device being exposed to the optical image during the second resolution mode. The first number of cells is greater than the second number of cells. The reset device is used to eliminate the residual charges in the shift register responding to the first reset signal and the second reset signal. The reset device is coupled to the shift register, and throwaway charges generated by the cells of the photo-sensing device, which are not exposed to the light of the optical image.

Apparatus for reducing exposing time of an image processing system

A method of resolving photoelectron coupling that results from the operation of a staggered charge-coupled device inside a scanner. The staggered charge-coupled device at least includes an optical sensor group comprising of an optical sensor array and a neighboring optical sensor array for scanning pixels. The method includes the step of: recording the quantity of photoelectrons transferred between a first quantity of photoelectrons captured by the optical sensor array and a second quantity of photoelectrons captured by the neighboring optical sensor array during a scanning time interval t. Thereafter, the quantity of transferred photoelectrons is subtracted from the first quantity of photoelectrons captured by the optical sensor array to obtain the correct quantity of photoelectrons captured by the optical sensor array during the scanning time interval t. Using the corrected value, accurate brightness value of the pixels scanned by the optical sensor array is obtained.

Method for resolving photoelectron coupling in staggered charge-coupled device

A method of image sampling and an apparatus thereof. The apparatus comprises: an adder; a first register, the output of which is fed back to the adder; a first multiplexer, which outputs a ratio or a weighted parameter; a multiplier, which receives an input image value and the output of the first multiplexer; an adder/subtracter, which receives the output of the multiplier; a second multiplexer, which receives the output of the adder/subtracter and the multiplier; and a second register, which receives the output of the second multiplexer. By the method of approximation and recursion, the input image data can be processed in real time to produce the output image data.

Method of image sampling and apparatus thereof

The present invention improves the contrast of the image signal before further adjustment by the principle of superposition of the optical-transferring system. There are two ways to carry out the principle of superposition one is in space domain, the other is in frequency domain. Each of them can be implemented by the system or method of the present invention. To implement the compensation in space domain, the present invention utilize the result of scanning the correction board to compensate the optical energy scattered by the optical-transferring system. A pixel in object space can be expressed in terms of the linear combination of the corresponding pixels in image space according to the principle of superposition. Thus is obtained by extracting the coefficients of the linear combination. The pixels of desired picture in image space is multiplied by the compensation vector and the image with sharp contrast is produced by the present invention in space domain. To implement the compensation in frequency domain, the present invention get the result of scanning the correction board and transform it to frequency form. Thus the compensation vector is obtained by extracting the amplitude and phase angle of the frequency form of the result of scanning the correction board. Transform the result of scanning the desired picture into frequency form, followed by dividing it by the compensation vector. The desired picture in frequency form is obtained. Taking the inverse transform of the desired picture, which is in frequency form, the result is transformed in space domain and can be processed or displayed with sharp contrast.

Growing community of inventors

Hsinchu, Taiwan

Shih-Huang Chen