Seiko Epson Corporation

Kazuya Takita

Seiji Takamatsu

Michio Yoshitake

Yuko Hirayama

Yuichi Kanai

A theoretical threshold corresponding to a transport path is set, and a control unit acquires a calculation value calculated based on a detection result of double feeding detection unit and a transport length of a document, determines occurrence of double feeding when the calculation value is greater than the theoretical threshold (step S), and determines non-occurrence of double feeding when the calculation value is smaller than the theoretical threshold. In addition, if a non-detection period for double feeding occurs (step S), the control unit sets a cumulative value in step S. As a result, detection of double feeding is ended in a short period while a document is being transported, and in a case that double feeding is no longer detected, determination of double feeding will not be made.

Document transport device, document transport method, and document transport control system

When a multi-feed of a document is detected, an image reading device acquires a document width from image data generated by a reading unit reading a leading end portion of the document. The document width is a length of the document in a width direction intersecting a transport direction. When, based on the document width, the size of the document corresponds to a specific size of a plastic card or an instant film, the image reading device does not execute error processing in response to an occurrence of the multi-feed, and when the size of the document does not correspond to the specific size, the image reading device executes the error processing.

Image reading device and image reading method

A reading unit is configured to capture an image of a shadow generated at a leading end of a document, and a control unit is configured to estimate a thickness of the document based on a pixel value of the shadow. A multifeeding error is displayed on a display unit when it is determined as thin paper in a thick paper determination. The control unit turns multifeeding detection to OFF and stands by until a feeding is completed, and upon completion, returns the multifeeding detection to ON.

Image reading apparatus for detecting multifeeding an interrupting or stopping the reading, and image reading method

An image reading device includes a reading unit that reads a document sheet and a reading standard surface and outputs read values corresponding to pixels arranged in a main scan direction, a control unit that processes the read values, and a storage unit storing information to be referenced by the control unit. In the storage unit, first data that is read values of the reading standard surface and serves as standards, and second data on ranges of variation, based on a change in a temperature, in the read values are stored. The control unit determines, based on the first data and the second data read from the storage unit and third data obtained by reading the reading standard surface after an acquisition of the first data, whether an abnormality exists in the pixels.

Image reading device, storage medium storing abnormality detection program, and abnormality detection method

A scanner has a first sensor array; a second sensor array; a timing controller that individually outputs at different times a first drive signal that drives the first sensor array, and a second drive signal that the second sensor array; and a light source configured that emits and illuminates a document during periods between the first drive signal and the second drive signal output next after the first drive signal, and periods between the second drive signal and the first drive signal output next after the second drive signal.

Scanner, and scanned image generating method

A screen display control device includes: a compression unit which compresses input image data in a line unit; a rewritable image memory to which the compressed data compressed in the line unit by the compression unit is written in non-synchronization with a reading process; a decompression unit which decompresses the compressed data periodically read from the image memory in synchronization with screen display to restore original image data; a display unit which displays an image of the image data decompressed and restored by the decompression unit; a buffer memory which temporarily maintains one-line data of the image data; and a writing/reading control unit which controls the process of writing the compressed data to the image memory and the processes of writing and reading the image data to and from the buffer memory.

Screen display control device

The invention provides a television-connection-state detecting device that includes: a resistor element that outputs an analog video signal that is to be displayed on a television receiver; a reference voltage generation circuit that generates reference voltages for comparing a voltage signal level at the television-connection-terminal side end of the resistor element and a voltage signal level at the opposite-side end of the resistor element; a first clamping circuit that clamps a voltage signal level at the television-connection-terminal side end of the resistor element at the first reference voltage; a second clamping circuit that clamps a voltage signal level at the opposite-side end of the resistor element at the second reference voltage; a comparison circuit; and a judging unit that judges whether an analog video signal input device is connected to the television connection terminal or not on the basis of a voltage signal level outputted from the comparison circuit.

Growing community of inventors

Yamaguchi, Japan

Kazuya Takita