JPS6251365A - Picture reader - Google Patents

Abstract

PURPOSE:To keep only correct picture information and to attain efficient reading by providing a display device monitoring picture information stored in a memory so as to prevent mistake at reading. CONSTITUTION:In reading an original 3, a semiconductor memory unit 2 is mounted on the reader 1 and the reader 1 is set onto the original 3 (an image sensor 14 is made coincident in the transverse direction of the original 3). Then the power supply of the reader 1 is turned on and the reader 1 is moved slowly from the upper end to the lower end of the original 3 manually while the reader 1 is monitored by a display device 4. The original image within the read with of the image sensor 14 is formed via a lens array 12 and a mirror 13, picture information subjected to photoelectric conversion is stored in the semiconductor memory unit 2 and displayed on the display device 4 at every main scanning. Moreover, in desiring to read the specific part of the original 3, the reader has only to be moved to the part only.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image reading device that enables monitoring of read images and prevents erroneous memorization.

[Conventional technology]

A conventional image reading device includes, for example, a platen on which a document to be read is placed, a reading optical system (a light source for illumination, an optical lens that forms an image of light reflected from the surface of the document, and an image obtained through the optical lens). (composed of a photoelectric conversion element such as a COD that photoelectrically converts an image) is moved relatively and automatically (for example, moved at a constant speed in the longitudinal direction of the document), and the image is sequentially scanned in the width direction. However, there is a device that reads the image optically, converts it photoelectrically, and stores the image information in a memory built into the device. The image information stored in the memory can be read out at any time, and the image can be reproduced by supplying data to a printer unit integrated into the image reading device or an external printer and printing it.

[Problem that the invention seeks to solve]

However, conventional image reading devices are not configured to be able to immediately monitor the image information read into the device, so it cannot be determined whether the image information is accurately stored in the memory by the image reading device alone. Unable to confirm, the only way to make a decision was to read the contents of the memory and print it out using a printer.

For this reason, in the case of hand-driven scanning devices (devices that perform sub-scanning manually, making it possible to reduce the size and read any part of the document), the sub-scanning speed (i.e., the manual movement speed of the device) If there is a variation (too slow or too fast) from the standard speed, or if there is a variation in height, there is a problem that the converted image information is stored in the memory without being read properly. However, this erroneous memory cannot be confirmed until it is printed out.

[Means and effects for solving the problems] The present invention has been made in view of the above, and in order to enable monitoring of the image information stored in the memory, the image information stored in the memory is divided into one bit. The present invention provides an image reading device that is attached with a display such as an LCD that displays each image.

〔Example〕

Hereinafter, an image reading device according to the present invention will be explained in detail.

1 and 2 show the appearance and the arrangement of the optical system of an embodiment of the present invention, in which a document 3 to be read is sequentially scanned and read in every predetermined width, and the image signal is decomposed into pixels and each A reading device 1 that outputs a binary signal according to a pixel and to which a semiconductor memory unit 2 can be detachably attached, and a reader device 1 that can be detachably attached to each of the device 1 and a printer as an external connection device (not shown). There is a card-shaped semiconductor memory unit 2 to which image information is written when attached to the reading device 1 and only read when attached to the printer, and image information written to the semiconductor memory unit 2. It is composed of a display 4 using an LCD that displays 1 bit at a time. The display 4 is formed into a panel shape and is attached to the back of the main body (in addition to the LCD, the display 4 can also be configured using an LCD array, CRT, etc.).

As shown in FIG. 2, the optical system built into the reading device 1 includes an illumination light source 11 using a fluorescent lamp, an LED array, etc. that illuminates the reading surface of the document 3, and a light source 11 that uses light reflected from the surface of the document 3 due to the illumination. a lens array 12 that forms an image on the light receiving surface of the image sensor 14; a mirror 13 that reflects the light from the lens array 12 onto the light receiving surface of the image sensor 14;
An image sensor 14 configured using a photodiode array made of COD, amorphous silicon, etc., which receives a light image from 3 and photoelectrically converts it, and outputs an electric signal obtained by digitizing the received light image for each bit, and the sensor 14 The control circuit 15 displays the obtained image information on a liquid crystal display or the like and controls writing to the semiconductor memory unit 2.

Incidentally, a rubber roller for driving a rotary encoder constituting a position detecting section, which will be described later, is mounted on the bottom surface of the reading device I. Further, the semiconductor memory unit 2 is
Backup battery and CMOS static R
It is configured in combination with non-volatile memory such as AM or EEPROM, and is used in the form of a card. Writing to this semiconductor memory unit 2 is performed in synchronization with a clock signal (output from the position detection section), but the image information is
As shown in the figure, after the output signal of the image sensor 14 is amplified by the amplifier 16, only the signals for which the output signal of the amplifier 16 exceeds the reference voltage E are outputted from the comparator 17, and this comparator output is synchronized with the clock signal. is written into the semiconductor memory unit 2 and the control circuit 15
is displayed on the display 4.

In the above configuration, when reading the original 3, the semiconductor memory unit 2 is attached to the reading device 1, and the reading device 1 is set on the original 3 (the image sensor 14
).

Next, the power of the reading device 1 is turned on, and the reading device 1 is manually moved slowly from the upper end to the lower end of the document 3 while being monitored on the display 4. The document image within the reading width of the image sensor 14 is transmitted to the lens array 12. mirror 13
The image information is formed on the image sensor 4 via the image sensor 4, and the photoelectrically converted image information is stored in the semiconductor memory unit 2 and displayed on the display 4 for each main scan. Note that if it is desired to read a specific part of the document 3, the reading device may be moved only to that part.

Since the width read by the image sensor 14 is limited to the reading width of the sensor 14, it is necessary to move the reading device 1 itself to perform sub-scanning. A position detection section is built into the reading device 1 to determine the position of this sub-scanning.

FIG. 4 shows the configuration of the position detection unit, which is rotated by the driving force transmitted via the rubber roller 5 that presses against the three surfaces of the document via the rubber belt 7 and the rubber belt 7, and generates a pulse signal in accordance with the rotation. a rotary encoder 6,
It is composed of a rubber belt 7 that is loaded between the encoder 6 and the rubber roller 5 and rotates as the reading device 1 moves on the document surface.

In the above configuration, when the reading device 1 set on the original 3 is moved, the rubber belt 7 rotates due to the friction between the rubber belt 7 and the original 3.

The rotational force of the rubber belt 7 is transmitted to the rotary encoder 6, and the rotary encoder 6 rotates. The rotary encoder 6 generates pulse signals at intervals depending on the rotation speed. This pulse signal serves to determine the resolution of the reading device 1.

That is, when the resolution is high, the number of pulses per moving distance increases, and when the resolution is low, there are fewer pulses.

When sub-scanning the reading device 1, the original 3 can be read normally if the generation interval of the pulse signal mentioned above is within a predetermined cycle, that is, the moving speed of the reading device 1 is within a predetermined speed range. An image identical to the content of the main scanned original is displayed on the display 4. If the contents of the document 3 and the displayed contents do not match, it means that there has been a change in the sub-scanning speed, and the reading is performed again to ensure that the correct display is displayed on the display 4. Thereafter, the entire surface of the document 3 is read while monitoring the display 4.

The image information stored in the semiconductor memory unit 2 can be read out by pulling it out from the reading device 1 and inserting it into a dedicated printer (or connected to a regular printer via an adapter), and can be reproduced by printing it out. You can get the image.

In FIG. 2, the light exiting the lens array 12 is reflected by the mirror 13, but the mirror 13 can be removed as shown in FIG.

In this case, the image sensor 14 is of a contact type and is placed close to the lens array 12.

Further, for the lens array 12, optical lenses other than the array type can also be used. Furthermore, although a rotary encoder is used as the position detection section, any other device can be used as long as it is capable of emitting electrical pulses in accordance with the moving distance.

Furthermore, although the display 4 was assumed to be provided integrally with the main body,
It may be separated from the main body and the two may be connected by a cable.

〔Effect of the invention〕

As explained above, according to the image reading device of the present invention, since a display device is provided to monitor the image information stored in the memory, mistakes in reading can be prevented and only correct image information can be saved. Reading can be performed efficiently.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of the present invention, and FIG. 2 is a perspective view showing one embodiment of the present invention.
FIG. 3 is a block diagram showing an example of a signal processing system according to the present invention; FIG. 4 shows a schematic configuration of a position detection section applied to the embodiment shown in FIG. 1. FIG. 5 is a front view and a layout diagram showing another example of the optical system. Explanation of symbols 1 -------~-・Reading device, 2-----1・-Semiconductor memory unit, 3 ・・−・
-・Original, 4-・-・Display device, 5-・・-Rubber roller, 6 ...-・・-Il:l-IJ-encoder, 7
---Rubber belt, 11-------Light source, 12--Lens array, 13--Mirror,
14--... Image sensor. Patent Applicant Fuji Xerox Co., Ltd. Agent Patent Attorney Shin Matsuhara 2 Dosage Kiyoshi Muraki
Same as above Jun Shima - Same as above
Hiroshi Sakai Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] Each time a device is manually moved over the document surface to perform sub-scanning, the document is optically main scanned, the read image is converted into a binary symbol by a photoelectric conversion element, and the converted image is converted into a binary symbol by a photoelectric conversion element. An image reading device that stores image information in a memory, further comprising a display that displays the image information.