JPH0439262B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a portable device that can be held in the hand, arbitrarily scans the surface of a document, stores the data in a memory, reads it from the memory at any time, and transfers it onto paper, for example. Related to portable scanners such as mold transfer machines.

BACKGROUND ART In an image sensor, in order to obtain the same voltage for each line to be read, it is necessary to provide a certain charge accumulation time for each line and output accumulated information to the processing circuit side after this time has elapsed.
Therefore, one line is read every fixed accumulation time.

By the way, since the portable scanner manually scans the document surface, the scanning speed varies.

Problems to be Solved by the Invention Conventionally, the accumulated information is output to the processing circuit at regular intervals, and reading is performed at regular intervals as described above, so the scanning speed is reduced as shown in Figure 6. The line density is small in large areas, and the line density is high in small areas, causing the problem that the transferred image expands and contracts with respect to the original image.

Means for Solving the Problems In order to solve these problems, the present invention, as illustrated in FIG. However, in a portable scanner that reads data from the memory 19 at a constant speed and performs sub-scanning at a constant speed during transfer recording, as shown in FIG. The speed detecting means 33 and the pulses from the scanning speed detecting means 33 are counted every charge accumulation time of the image sensor 18, and the image information accumulated in the image sensor 18 is stored in the memory a number of times corresponding to the number of counts. The write circuit 34 writes to 19 different storage areas.

Operation In this way, if the manual scanning speed is high, the same image information can be stored at multiple addresses in the memory 19 using more write cycles.

Embodiments Next, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a side view showing a simplified basic mechanical configuration of a portable scanner (transfer machine) according to the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a bottom view of the same. It is housed in a case 10 that is large enough to be held in one hand, and is designed so that all operations can be performed with one hand. Bottom surface 1 of case 10
0a, a tire window 11 is formed in the center thereof, and a scan window 13 and a transfer window 14, which are closed with a cover glass 12, are formed before and behind this.

Inside the case 10 is a light source as a scanning section.
LED array 15, mirror 16, lens 17,
A CCD type image sensor 18 is provided, and the light from the LED array 15 is projected outside through the scan window 13, and the reflected light enters the case 10 again through the scan window 13, reflects off the mirror 16, and enters the lens 17. After the light is focused, it is converted into an electrical signal by the image sensor 18 and stored in the memory 19 built into the case 10 as will be described later.

In addition, a part of the case 10 is provided with a tire window 1.
Tire 20, which is the main vehicle, protrudes outward from 1.
A driven wheel 21 and a slip/clutch mechanism 22 are provided. The rotation of the tire 20 is transmitted in only one direction by the one-way clutch 23 from the pulley 24 to the pulley 26 via the transmission belt 25, and further to the driven wheel 21 via the slip/clutch mechanism 22. communicated.

Furthermore, in the case 10, an ink ribbon 27 is provided.
is removably loaded in a cassette.
The rotation of the tire 20 is also transmitted to the ribbon roll 28 of the ink ribbon 27 via the rotation transmission system as described above, and the ink ribbon 27 is conveyed from the ribbon roll 28 to the transfer window 14. This transfer window 14 has a thermal head 2 as a printing head.
9 is attached, the thermal head 29 is urged outward by a spring 30, and the ink ribbon 2
The structure is such that it is pressed against the document surface via the guide 7.

The rotation of the tire 20 and the ribbon roll 28 is
It is detected by the rotation detector 33 composed of the encoder 31 and the photo sensor 32, and the image sensor 18
The photoelectric conversion and storage in the memory 19 in the fourth
The write circuit 34 shown in the figure performs the following depending on the speed of the tire 20.

That is, FIGS. 5A and 5B show the image sensor 18.
The relationship between the number of pulses of the rotation detector 33 and the charge accumulation time of the rotation detector 33 is shown.
0.125mm) Outputs one pulse for each scan. This number of pulses is counted in the write circuit 34 for each cycle of charge accumulation time. When writing the image information accumulated in the image sensor 18, a number of write cycles corresponding to the number of pulse counts are generated for each charge accumulation time, and the memory is written for the number of cycles.
Repeat writing to 9. For example, when two pulses occur during a certain charge accumulation time, the write cycle is set twice and the same image information is written to the storage area of two rows of the memory 19 as shown in FIG. When there are three, it is written in the storage area for three lines.

In this way, when reading from the memory 19 by the reading circuit 35 and transferring it by the thermal head 29 via the ink ribbon 27, an image that does not expand or contract in the scanning direction is reproduced regardless of the scanning speed at the time of reading. can.

Note that this transfer machine is used by switching between a scanning mode and a transfer mode using a switch, for example, and when the scanning mode is set, the lower surface 10a of the case 10 is directed toward the document surface, and the document is If the tire 20 is moved along the surface and scanned, the information from the scan is stored in the memory 1 as described above.
9 is stored. In addition, when the transfer mode is set, by applying the ink ribbon 27 to the paper surface and moving it along it, the information stored in the memory 19 can be read out as described above and can be applied to any desired paper. It can be freely transferred to any position.

Effects of the Invention According to the present invention, an image without expansion or contraction in the scanning direction can be reproduced regardless of the scanning speed during reading. That is, when reading, it is possible to read with a constant linear density, and when reading and transferring, it is possible to realize an image that does not expand or contract with respect to the original image.

[Brief explanation of drawings]

Fig. 1 is a simplified side view of an embodiment of the present invention, Fig. 2 is a front view thereof, Fig. 3 is a bottom view, Fig. 4 is a block diagram, and Fig. 5 A, B, and C are charge accumulation of the image sensor. FIG. 3 is an explanatory diagram showing the relationship between time, the number of pulses of a rotation detector, and a writing mode to a memory. Further, FIG. 6 is an explanatory diagram showing that linear density unevenness occurs in the conventional method. 18...Image sensor, 19...Memory, 3
4...Writing circuit.

Claims (1)

[Claims] 1 In a portable scanner that manually scans the document surface, reads it with an image sensor, stores the data in memory, and performs sub-scanning at a constant speed while reading from the memory at a constant speed during transfer recording, the manual scanning speed is a scanning speed detecting means for detecting and generating pulses in accordance with the scanning speed detecting means, and counting the pulses from the scanning speed detecting means for each charge accumulation time of the image sensor, and converting the image information accumulated in the image sensor into a count number. 1. A portable scanner comprising: a write circuit that writes data to different storage areas of the memory a corresponding number of times.