Abstract:
An image reading apparatus for reading a document has an image sensor unit, which is moved along a platen glass in a sub-scanning direction, mounting an LED, a light guide and a sensor. A white reference panel for use of shading correction is provided on the platen glass on the side thereof opposite the image sensor unit. Light shield plates are provided on the platen glass on the side facing the image sensor unit along both sides of the white reference panel.
Abstract:
The invention relates to a joining construction for mounting the CCD cells of a color line camera on a color splitting prism (30) attached to a prism housing (2). Each CCD cell (6, 7, 8) is attached, by a first glue joint (13), to its fastening element (9), the length (L2) whereof is essentially larger than the length (L1) of the CCD cell, and which fastening element (9) extends from the housing margin (12a) located on one side of said exit surface (20a, 20b, 20c) of the color splitting prism to the other housing margin (12b) located on the opposite side thereof. Each fastening element (9) is attached to said margins by third glue joints (11).
Abstract:
A photosensor having an electrically insulating, translucent substrate; an opaque conductive layer formed on the substrate; and insulating layer formed on the conductive layer, and a semiconductive layer formed on the insulating layer for receiving light and providing a current corresponding thereto. A pair of electrodes are formed in contact with the semiconductor layer and define a light receiving window therebetween. The electrodes are formed so as to not substantially overlap the conductive layer. The conductive layer is supplied with a bias voltage corresponding to a polarity and an amount of carriers defining the current of the semiconductor layer and a voltage Va of a small absolute value during a non-reading period of the photosensor.
Abstract:
A contact-type linear image sensor has two separate substrates aligned adjacent to each other. A linear array of amorphous silicon photoelectric converting elements serving as photoelectric cells and a matrix wiring unit are provided on a first substrate. Driver IC chips are mounted on a second substrate. Connection pad patterns for common cell electrodes of cell groups and connection pad patterns for row signal lines of the matrix wiring unit are provided concentrically at a peripheral edge of the first substrate to be aligned along a junction edge line defined between the substrates. Connection pad patterns for the IC chips are linearly aligned at a peripheral edge of the second substrate and along the substrate junction edge line to oppose the pad patterns of the first substrate. A connector unit for electrically connecting the pad patterns of the first and second substrates may be provided at only one position of the junction edge portion of the first and second substrates.
Abstract:
A reading apparatus that reads a sheet includes: a first light emitting diode (LED) configured to emit light with a specific wavelength; a light emitting element including a second LED configured to emit light with the specific wavelength and a phosphor configured to be excited by the light emitted from the second LED; a line sensor configured to generate a reference signal according to a quantity of received light emitted from the first LED and reflected off the sheet, and also generate an image signal according to a quantity of received light emitted from the light emitting element and reflected off the sheet; and a controller configured to generate an image representing the sheet from a differential result obtained by removing a component corresponding to the reference signal from the image signal.
Abstract:
An image reading apparatus includes a main unit, an openable unit, a cable connected to the openable unit and routed in the main unit, and a holding member attached to the main unit. The holding member includes a first guide portion configured to hold a first specified portion of the cable. The holding member, with the first guide portion holding the first specified portion of the cable, is configured to move from a first position to a second position. When the holding member is in the first position, the cable has no slack in a second specified portion of the cable, the second specified portion being closer to an end of the cable disposed in the openable unit than the first specified portion. When the holding member is in the second position, the cable has slack in a second specified portion of the cable routed in the main unit.
Abstract:
The reading device includes an image reading unit, a document feeder unit, a table document detection unit for detecting presence or absence of a document on the place-reading contact glass, a document set sensor for detecting setting of the document, a size detection unit for detecting a size of the document on the document tray, and an open/close detection unit for detecting open and close of the document feeder unit. In a determination necessary state in which setting of the document is not detected while an object on the document tray is detected, it is determined to execute feed reading, or to execute place reading, or to be disabled to confirm to execute the place reading or the feed reading, based on whether or not there is a document on the place-reading contact glass and based on history information.
Abstract:
A light collecting member includes a lens to make incident light be collected on a light receiving member, a lens barrel to house the lens, an end portion into which a light enters of the lens barrel being arranged near the light receiving member and a fence member to cover the end portion into which a light enters of the lens barrel and the light receiving member, the fence member having an exhaust port formed in a manner extending in a vertical direction.
Abstract:
A configuration is adopted in which an image sensor unit includes: a sensor substrate on which a plurality of photoelectric conversion elements are mounted; a light source that includes light-emitting elements and is for illuminating a document; a light guide that guides light from the light source from one end face in a longitudinal direction and linearly illuminates the document; a rod lens array imaging reflected light from the document on the sensor substrate; and a frame attaching each of these, and in which the frame detachably includes a spacer provided in proximity to the light source, and the spacer includes a light shielding roof elongated so as to cover the light source and the end of the light guide.
Abstract:
A semiconductor device that includes: a first trans-impedance amplifier that converts a first current signal generated by a first photodiode, into which an optical signal is input, into a first voltage signal; a second trans-impedance amplifier that converts a second current signal generated by a second photodiode, to which an optical signal is blocked, into a second voltage signal; a peak hold circuit that holds the peak value of the first voltage signal; a comparator that outputs a pulse on the basis of the first and second voltage signals; and a threshold current setting circuit that draws out a threshold current, which is proportional to a reference current generated on the basis of a voltage difference between a peak voltage output by the peak hold circuit and a reference voltage at the output node of the second photodiode, from the connection between the second photodiode and the second trans-impedance amplifier.