Nec Corporation

Nec Engineering, Ltd.

Other

Nec Platforms, Ltd.

Tetsuichiro Yamamoto

Shinya Kubo

Kouji Okada

Hiroshi Hoshimiya

Kouji Nakahara

Yasushi Matsumoto

Yutaka Okazaki

Hiroya Ooki

Tatsuya Shimizu

The present invention provides a control method of an image reading device, an image reading device, and a non-transitory computer-readable medium having a program stored thereon, which avoid a reduction in reading resolution. The control method of the image reading device includes: a first step (ST) of generating N line-shaped images indicating N line-shaped regions (W) in an imaging target (T) being conveyed in a conveying direction (X) by imaging the N line-shaped regions (W) extending in a direction perpendicular to the conveying direction (X); a second step (ST) of performing the same step as the first step (ST) at a point in time when the imaging target (T) is conveyed by an amount associated to a width () of N&#x2212;1 line-shaped regions; and a step (ST) of generating a read image by arranging the N line-shaped images generated in each of the steps in ascending order.

Image reading device control method, image reading device, and non-transitorycomputer-readable medium with stored program

An image reading device includes: a CCD for reading an image on a document to output an image signal; a light source for switchingly emitting visible light and non-visible light; and lighting control means for controlling lighting periods of the light source. The lighting control means is adapted to perform control such that a first light source lighting period for applying non-visible light is longer than a second light source lighting period for applying visible light. The image reading device also includes splitting means for splitting the image signals outputted from the CCD into an image signal upon application of visible light and an image signal upon application of non-visible light.

Image reading device for reading document images with visible light and non-visible light being switchingly applied

The present invention provides an image reader apparatus capable of obtaining an image having stable brightness while suppressing an increase of the cost of the apparatus. The image reader apparatusfor reading an image on a documentbeing fed and outputting an image signal includes a synchronization signal generation circuitfor generating a synchronization signal SS synchronous with a feed timing and a feed cycle of the document, a CCDfor reading an image on the documentin synchronism with the synchronization signal SS, an LEDfor emitting white light, and a lighting control circuitfor turning the LEDon in synchronism with the synchronization signal SS and turning the light source off so that a lighting period is equalized for each line irrespective of a variation of the feed cycle of the documentThe lighting control circuitturns the LEDoff so that the lighting period of the LEDis equal to a predetermined preset period.

Image reader apparatus and method of driving the same

An image reading apparatus includes a touch panel that outputs a press position pressed by a finger as coordinate information in a sub-scanning direction, the finger being placed on the surface of the touch panel, a CCD that takes an image of the finger placed on the touch panel from the rear side of the touch panel in a main-scanning direction, and outputs an image signal, and a motor that moves the CCD in the sub-scanning direction so as to follow a rotational movement of the finger based on the movement amount detected by the movement detection unit.

Image reading apparatus and image reading method

An image reading apparatus is provided which is capable of reading an original document at a higher speed. M pieces of lines on the surface of the original document can be simultaneously read by M pieces of line-like strings of light sensing devices making up a CCD (Charge-Coupled Device) having an interval represented by N pieces of lines to be read. When simultaneous reading is completed, the original document is moved to a line existing apart by L pieces of lines from the lines that have been read. While the original document is moving, image signals of lines that have been read are A/D (analog to digital) converted and then stored to memory regions. Simultaneous reading operation and subsequent storing are sequentially performed on lines on which the line-like strings of light sensing devices are placed.

Image reading method and apparatus for same

The scanner includes the switch that is closed when a document is read, the boosted-voltage conversion circuit that boosts a DC voltage of 12 volts (V) supplied from a power source (not shown) and then converts it into a high-frequency signal b of 50 KHz, the temperature detection circuit formed of the thermistor for ambient temperature detection and correction circuit , and the dimmer control circuit that varies the high-frequency signal b from the boosted-voltage conversion circuit according to a temperature detected by the thermistor and produces a drive signal c to vary the luminance of the cold-cathode-tube light source

Scanner having cold-cathode-tube light source and method of controlling a drive signal for illuminating a cold-cathode-tube light source

An image reading apparatus according to the present invention employs an optical system including a fluorescent lamp as a line light source for illumination of the image source. An image reader housing has an elongated window. The translucent lamp positioned within the housing has a light emitting tube. The light emitting tube includes a middle section that is elongated in a direction parallel to the window width with a length at least equal to the maximum extent of the window width. The light emitting tube includes two boundary sections between which the middle section extends. The two boundary sections have bent ends connected to the middle section at ends thereof, respectively.

Image reading apparatus

An image reader including a light source irradiating light to a reading object, a reading device reading an image on the reading object based on the radiated light; and a lens focusing the image onto the reading device and having a characteristic by which a distortion rate is increased from the central part to the end part. The distortion rate of the end part is set to a value in which there is no need to complement the read image.

Image reader which can shorten focal length in optical system having optical lens while keeping predetermined image reading width

An image input apparatus comprises a cold cathode tube light source and a solid imaging device. The image input apparatus reads an image from a document paper by receiving at the solid imaging device a reflected light which is obtained by reflecting a light of the cold cathode tube light source on the document paper. On putting cold cathode tube light source into an on-state, an inverter control circuit controls an inverter to make the inverter supply the cold cathode tube light source with an overcurrent higher than a predetermined tube current which is for use in continuously and stably irradiating a predetermined luminous energy from the cold cathode tube light source. After the overcurrent is applied to the cold cathode tube light source during a predetermined duration, the inverter control circuit controls the inverter to make the inverter reduce the overcurrent to a predetermined current in accordance with an output of the solid imaging device.

Control apparatus capable of improving a rise time characteristic of a light source

A scanner according to the present invention includes a cold-cathode tube for radiating light on a manuscript reading position where an image on a manuscript is detected by an image sensor, a pre-heater for preheating before the lighting of the cold-cathode tube, a light source for detection connected to the pre-heater in series for radiating light toward the manuscript reading position to detect the end of the manuscript, a detecting element for detecting light reflected in the manuscript reading position from the light source for detection and generating a detection signal showing that the end of the manuscript is detected and a driving circuit for controlling the lighting of the cold-cathode tube and the stop of the pre-heater according to the detection signal from the detecting element. The lighting of the light source for detection and preheating by the pre-heater can be controlled with common power by connecting the pre-heater and the light source for detection for detecting the end of a manuscript in series and in addition, the lighting of the light source for detection and preheating can be simultaneously started.

Scanner and method of controlling lighting cold-cathode tube thereof

When the scanner moves over the subject copy, the first reading elements of a close contact type image sensor (1) read the copy. As the movement causes a platen roller (5) to rotate, an encoder ring (4), having a prescribed distinguishing pattern (10) printed within, rotates. Second reading elements configured outside the copy reading range of the close contact type image sensor (1) read the distinguishing pattern, which moves over the reading face as the encoder ring (4) rotates. The second reading elements which read the distinguishing pattern are driven independently of the first reading elements for reading the subject copy, and their reading period is shorter than that of the first reading elements. This configuration enables the moving speed to be accurately detected even when the scanner moves faster than the copy reading speed.

Scanner

An image reading device, particularly a hand scanner, capable of setting a reading position in the main scanning direction accurately at all times. A stage glass is affixed to the reading surface of the hand scanner. A reference line is printed on the stage glass outside of the valid reading range of a CCD (Charge Coupled Device) image scanner. For the adjustment of the valid reading range, the image sensor and a lens are roughly adjusted such that data representative of the reference line appears at the edge of the valid reading range. Subsequently, the valid reading range is electrically shifted in the main scanning direction such that the reference line disappears.

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Tokyo, Japan

Tetsuichiro Yamamoto