398 results about "Contact image sensor" patented technology

The present invention relates to an information card with multiple storage media. Combining reading and writing characteristics of magnetic strip storages, ICs, PFIDs and etc. with large storage capacity of a compound printing 2D barcode, the invention uses a base card with a magnetic strip storage medium or a base card beset with an IC read-write chip, and a RF read-write chip. On said base card contains a first 2D barcode which has different reflectivities to lights in the first spectrum area between bars and spaces, there is a designated relation between data stored in the magnetic strip or the IC chip, RF chip and data stored in the first 2D barcode. The invention discloses a read-write device of the information card comprising a Contact Image Sensor (CIS), a magnetic head or an IC chip reader, an RF chip reader. The invention further discloses a method for reading and writing data in said information card.

A contact image sensor having a waveguiding structure for propagating light in a first direction including, in series, a first clad medium, a first core, a switchable grating clad, a second core, and a second clad medium sandwiched by transparent substrates, patterned parallel electrode elements orthogonally traversing the waveguides, a light source, a platen and a detector. Switchable grating regions overlapped by a first voltage-addressed electrode element diffract TIR light from the first core towards the platen. Switchable grating region overlapped by a second voltage-addressed electrode element diffract TIR light reflected from the platen into a TIR path within the second core.

The invention provides a design method of a multispectral paper currency detector, sequentially comprising the following steps: firstly, judging the orientation of a paper currency through double photoelectric cell signals and magnetic head signals when the paper currency enters the currency detector and then obtaining a paper currency image by using a CIS (contact image sensor); secondly, carrying out luminance compensation, paper currency edge detection and pretreatment of geometric correction on a collected CIS original image to obtain a standardized paper currency image; thirdly, extracting paper currency image features, distinguishing the truth of the paper currency according to the features and identifying the crown of the paper currency on the basis of an image analysis method; andfourthly, sending the distinguishing result or the crown identifying result to other devices or components through an RS-232, an Ethernet or a universal I/O (Input/Output) signal. Through the method,the truth distinguishing with higher reliability can be realized and the identification of the crowns of the paper currencies can be realized at the same time so that banking systems are supported torealize the scientific management of the currency circulation.

The invention provides a high-speed and high-resolution number collecting device of a banknote sorting machine and an identification method. The high-speed and high-resolution number collecting device of the banknote sorting machine comprises image sensors, a multichannel A/D (analog to digital) converter chip, a programmable logic chip, a digital signal processor chip, a dynamic memory chip and a communication structure chip, wherein the image sensors are respectively connected with the multichannel A/D converter chip, the multichannel A/D converter chip is connected with the programmable logic chip, and the programmable logic chip is respectively connected with the digital signal processor chip and the dynamic memory chip. The invention realizes the high-resolution collection to banknote images under the condition of high-speed operation of the banknotes. The contact type image sensors have the advantages of low cost, small volume and low requirements for light source performance. Positioning and cutting thresholds are not needed to be set in the identification method of banknote numbers, so that an accurate positioning and cutting position and ideal identification results can be obtained when the banknotes are depreciated and polluted.

The invention provides a photoelectric conversion device, in which a decrease in sensitivity and a crosstalk between wirings are suppressed. Plural pixel columns are arranged in one direction, plural pixels are arranged in a different direction to the one direction in a column manner in the pixel column, and the pixel includes a photodiode PD, a reset transistor M4 for resetting the photodiode PD, and a source follower input transistor M3 for receiving a signal from the photodiode PD. An independent readout wiring 16 is individually provided for each pixel. The reset transistor M4 and the source follower input transistor M3 included in one pixel column or another pixel column are arranged between the photodiode column in one pixel column and the photodiode column in another pixel column arranged adjacent to the one pixel column.

An image reader includes a casing, a contact glass plate, a contact image sensor, and a sliding mechanism; wherein the contact image sensor has a housing, a light source attached to the housing so as to face the contact glass plate, a plurality of light receiving elements attached to the housing so as to face the contact glass plate and aligned in parallel in a longitudinal direction of the housing, and a bearing formed integral to the housing at a position below a lower surface of the housing; and the sliding mechanism includes a guide shaft provided on the casing and extending in a short direction of the housing and inserted through the bearing, and an urging member elastically which urges the guide shaft toward the contact glass plate so that the housing is pressed against the contact glass plate.

A scanning module includes a contact image sensor unit and a supporting base. The contact image sensor unit has a top surface, a bottom surface, a front surface and a back surface. The supporting base has a guiding portion, a positioning board mounted on the guiding portion, the two sides of the positioning board extends sideward and bends upward to form an elastic arm respectively, the contact image sensor unit is placed on the positioning board and the elastic arm elastically contacts the bottom surface of the contact image sensor unit. The two sides of the supporting base of the scanning module have an elastic arm respectively, the elastic arm contacts the contact image sensor unit directly and makes sure that the contact image sensor unit contacts the glass tightly.

The invention provides an image compensation and correction method and a banknote detection and identification device. The image compensation and correction method is applied to the banknote detection and identification device. The banknote detection and identification device comprises a micro control unit, a field programmable gate array, an AD (Analog to Digital) chip, a driving circuit, a static random access memory and a contact image sensor, wherein the field programmable gate array is connected with the micro control unit, the AD chip, the driving circuit and the static random access memory are connected with the field programmable gate array respectively, and the contact image sensor is connected with the AD chip and the driving circuit respectively. A compensation and correction lookup table is pre-stored in the static random access memory and the field programmable gate array accesses the static random access memory to obtain banknote compensation and correction data corresponding to banknote image pixels and transmit to the micro control unit, so that the micro control unit directly obtains the banknote compensation and correction data from the field programmable gate array without performing compensation and correction on the obtained banknote image pixels any more, accordingly the system performance of the micro control unit is improved, and then the working efficiency of the banknote detection and identification device is improved.

An image reading apparatus of a contact image sensor type includes an area light source. The image reading apparatus is used for reading a light transmitting original placed on an original base by irradiating light thereto from the area light source and receiving transmission light. The original base has an uneven portion on a front surface on the side on which the light transmitting original is placed so that the adhesion of the light transmitting original to the original base is prevented upon placing the light transmitting original on the original base. The uneven portion does not effect optical characteristics for reading the light transmitting original.

A contact image sensor unit includes: a light source (10) illuminating an original; a rod-like light guide (11) guiding light from the light source to the original; an imaging element (12) forming reflected light from the original on a plurality of photoelectric conversion elements; a sensor substrate (14) on which the plurality of photoelectric conversion elements are mounted; a frame (15) to which they are attached and which has a positioning part (200) for attaching the light guide (11) thereto; and a supporting member (16) which attachably/detachably supports the light guide (11) and is attachably/detachably attached to the positioning part (200). Since the light guide (11) can be attached to the frame (15) without using an adhesive, the deformation of the light guide (11), the warpage of the contact image sensor unit and so on can be prevented.

A web inspection module is described for scanning an imprinted web in a printing press. The web inspection module includes a light source for illuminating a portion of the web, a contact image sensor having a plurality of sensing elements, and a processor for receiving and processing image data representative of the imprinted web.

An image scanning device is provided with a transparent plate, a contact image sensor, a scanning device casing, a cover member, and a display device. An image medium having an image to be scanned is placed on the transparent plate. The contact image sensor is disposed below the transparent plate, and scans the image of the image medium placed on the transparent plate. The scanning device casing houses the transparent plate and the contact image sensor. The cover member covers a top face of the transparent plate. The display device is capable of moving between a lying position and a standing position. In a state where the display device is positioned anywhere between the lying position and the standing position, a top end of the display device is lower than a top end of the cover member, and a bottom end of the display device is higher than a bottom end of the scanning device casing.

An image quality measurement apparatus measures quality of an image printed on a substrate. The apparatus comprises illumination elements and image sensors, both mounted in close proximity to the substrate, a controller of the image sensors and illumination elements, and an analyzer of the measurements of the image sensor. The measurements can be used as real time feedback to a printer. The measurements may include density, colorimetric data, and inspection of printed sheet using Contact Image Sensors (CIS).

In an image reading apparatus using a contact image sensor, an area light source for reading an image from a film original is provided. The area light source has a light guide plate and an LED device in the center of a side surface on the shorter side of the plate. In the LED device, red-, green-, and blue-LED chips are mounted on the same package and red-, green-, and blue-light are switched and lit. A white bottom plate covers the bottom surface of the light guide plate and a white case frame covers the four side surfaces. A scattering sheet is adhered to the upper surface of the white case frame, that is, a light emitting surface. On the rear surface of the light guide plate, light scatterers are formed by screen printing so that a specific pattern is drawn by high-reflectance white ink.

A contact image sensor includes a first optical sensing element and at least one additional optical sensing element. The first optical sensing element includes plural optical sensing units arranged in a line along a first direction. Plural first image units are successively generated when the first optical sensing element senses a first source light. The at least one additional optical sensing element is disposed at a lateral side of the first optical sensing element, and includes plural optical sensing units arranged in a line along the first direction. When the additional optical sensing element senses an additional source light, plural additional image units are successively generated. The adjacent optical sensing units of the first optical sensing element and the at least one additional optical sensing element are partially overlapped with each other along a second direction, which is perpendicular to the first direction.

The invention relates to a contact image sensor (CIS), belonging to the technical field of image readout devices. The invention is used for identifying the color-changing ink anti-counterfeiting label on the surface of the paper money. The CIS is characterized in that light sources different in light-emitting angles are respectively arranged at the two sides of a lens; and a non-reflecting film is adhered to the inner surface of a transparent board. As the color-changing ink anti-counterfeiting label on the surface of the genuine paper money changes in different colors from different angles, that is, the light irradiates the color-changing ink anti-counterfeiting label on the surface of the genuine paper money in different angles and the reflected light is different, but the counterfeit paper money does not have the characteristic, the light emitted by the two light sources of the CIS respectively irradiates the color-changing ink anti-counterfeiting label on the surface of the paper money in different angles, the reflected light is respectively received by the CIS, the CIS analyzes, processes and compares the two kinds of light received by the CIS and the obtained information is compared with the relevant information of the genuine paper money so as to achieve the aim of identifying authenticity of the paper money.