JPS6116671A - Image read and display system - Google Patents

Abstract

PURPOSE:To shorten a display switching operation time and to prevent an image from being displayed upside down on a display part by reading a picture by an image reading means throughout a both forward and backward moving period and changing moving directions of an image carrier according to the moving direction of the image reading means. CONSTITUTION:An aerial image 10 is scanned and read by a CCD11 while a carriage 16 is moved by the motor 14 at the side of an image reader X as shown by an arrow A. At this time, an image is formed outside a beltlike photosensitive body 23 at the side of an image display device while the photosensitive body 23. At this time, a mirror 34 is at a solid-line position and an exposure position 28 is exposed. Then, when a next frame (f) of a microfilm F is read, the detection signal of a photosensor S is inputted to a control circuit and the motor 14 starts reversing, so that the aerial image 11 is read while the carriage 16 is moved as shown by an arrow D. At this time, the image display device Y moves the photosensitive body 23 are shown by an arrow G and the mirror 34 moves to a broken-line position, thereby exposing an exposure position 37.

Description

[Detailed Description of the Invention] [Technical Field] The present invention relates to an image reading and display system equipped with an image reading device and an image display device. The present invention relates to an image reading and display system that includes an image reading device that reads data and converts it into an electrical signal, and an image display device that visually displays a microscopic image according to the image information that has been converted into an electrical signal.

[Prior art]

Conventionally, this type of system has a large-capacity recording medium such as microfilm on which image information such as a large amount of documents or drawings is stored and recorded, and the information recorded on the microfilm can be searched as necessary. There are known microfilm retrieval devices that display information on a display screen.

This microfilm retrieval device generally employs a method in which a transmitted light image from the image surface of the microfilm is optically projected onto a display screen surface, and this projected image is displayed.

As an alternative to this system, the applicant has developed an image reading device that uses a charge-coupled device (hereinafter referred to as CAN) to read a transmitted light image from the image surface of a microfilm and convert the read information into an electrical signal. An image information processing device is being developed that includes an image display device having a belt-like image carrier that carries an image corresponding to image information converted into an electrical signal as a visible image.

FIG. 1 shows a perspective view of a microfilm image reading device applied to the system.

The microfilm F is housed in a cartridge 1 and is wound onto a reel 5 via rollers 2.3 and 4. Each frame f of microfilm F placed in a predetermined position
is illuminated by illumination light from the illumination lamp 6 that passes through the first mirror 7 . The transmitted light that has passed through the image plane of the frame f is imaged by the lens 8 via the second mirror 9 at the optical image forming position as an aerial image 1o. This aerial image 10 is read by a CCD 11 and converted into an electrical signal by driving a carriage 6 equipped with a CGD 11 as an image reading means in the direction of arrow A along a pair of guides 12 and 13. The carriage 1B is driven by transmitting the driving force from the motor 14 to the carriage 18 via the wire 15.

Figure 2 shows the image information of frame f of microfilm F scanned and read by CGDII as described above.
An example of a cross section of an image display device for displaying in a visible form is shown.

In the figure, 17 is a housing in which the following elements are arranged, and inside this housing 17 is a belt-shaped photoreceptor 23 which is an image supporting member that is guided by rollers 18 to 22 and is intermittently driven. is passed over the rollers 18 to 22. The belt-shaped photoreceptor 23 is preferably one in which a photoconductive layer is provided on a transparent conductive belt base, for example.

Further, based on the image information read by the image reading device shown in FIG. is scanned.

Furthermore, this scanned laser light exposes the inner surface of the belt-shaped photoreceptor 23 via the f-theta lens 25 and the mirror 2B.

The toner developing device 27 is located at the exposure position 2 of the belt-shaped photoreceptor 23.
8. This toner developer 27
According to the exposure state of the belt-shaped photoreceptor 23, toner is attached to the outer surface side of the belt-like photoreceptor 23 to form a visible image depending on the exposure state.

This image forming method is disclosed in JP-A-58-98748 or JP-A-58-98748, and can be used.

One roller among the five rollers 18 to 22 mentioned above,
For example, the roller 18 is moved by an arrow B by a motor (not shown).
By driving in the direction of arrow C, the belt-like sensing/light body 23 is rotated in the direction of arrow C. By exposing the inner surface of the belt-shaped photoreceptor 23 to laser light from a semiconductor laser while rotating the belt-shaped photoreceptor 23, the film F read by the image reading device shown in FIG.
A toner image corresponding to the image of frame f is formed.

The toner image as a visible image formed on the outer peripheral surface of the belt-like photoreceptor 23 in this way is sent to the display section 29 as the belt-like photoreceptor 23 rotates, and at the position of the display section 28. Stop. The display unit 28 has a rectangular window hole 30 in the upper surface of the housing 17 and covers the window hole 30 with a transparent member 31, so that the toner image on the belt-shaped photoreceptor 23 is transparently transmitted through the transparent member 31. It becomes possible to visually recognize the member 31 from above.

However, the image reading and display system having the image reading device and the image display device shown in FIGS. 1 and 2 has the following drawbacks. That is, the carriage 16 is moved in the direction of the arrow as shown in FIG.
When the aerial image 10 is read by II and the read information is reproduced and displayed by the belt-shaped photoreceptor 23 moving in the direction of arrow C as shown in FIG. This results in a mirror image of the image of frame f in F, or an image with the top and bottom reversed.

For this purpose, the moving direction of the carriage 16, in other words c
The scanning direction of cntt is limited to the direction of the arrow.

In this way, when the moving direction of the carriage 16 is limited only to the direction of the arrow A, after the reading of the CCD II in the direction of the arrow A is completed, the carriage 18 is reversely moved in the direction of the arrow.
Furthermore, the predetermined reading start position of CGDII! A series of operations are required to return the carriage 1B to the original position.

During this return operation of the carriage 1B, the CCD
Since the image cannot be read by the carriage 11, this return operation time of the carriage 18 is wasted time. Moreover, when the images on the microfilm F are to be displayed sequentially on the single-image display device side, a waiting time equal to the above-mentioned return operation time of the carriage 16 or frame-by-frame feeding time of the microfilm F occurs after one screen is displayed. Moreover, since the aerial image 10 read by CGDII is an enlarged image of frame f of the microfilm F, the return operation time of the carriage 1B described above is longer than the time for advancing the microfilm F one frame. Generally required.

Therefore, in an image reading display system having an image reading device such as CGDII in which the reading element requires a return operation, there is a drawback that the waiting time when sequentially switching the display screen on the image display device side becomes long. will have.

〔the purpose〕

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to not limit the image reading direction on the image reading device side, to eliminate the need for a return operation of the image reading means, and to improve image display on the image display device side. An object of the present invention is to provide an image reading and display system that can switch image displays at high speed by reducing waiting time.

Another object of the present invention is to provide an image reading and display system in which an image displayed on an image display device always corresponds to the read image and does not become a mirror image or an upside-down image.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 3 is a sectional view showing an example of the configuration of an image display device applied to the system of the present invention. In FIG. 3, parts similar to those in FIG. 2 are designated by the same reference numerals, and detailed explanation thereof will be omitted.

Here, the belt-shaped photoreceptor 23, which is an image supporting member, is passed over six rollers 18, 32, 33, 20, 21 and 22, respectively.

This swinging mirror 3 passes through the lens 25 and the first mirror 26.
4, this laser beam is sent to mirror 35 or 36.
can be deflected in either direction.

That is, when the swinging mirror 34 is at the position indicated by the solid line in the figure, the laser beam reaches the first exposure position 28 via the mirror 35. On the other hand, the swinging mirror 34 is shown in the figure.

When the laser beam is at the position indicated by the broken line in the middle, the laser beam is reflected by the mirror 36.
The second exposure position 37 is reached via .

A first developing device 27 and a second developing device 27A are disposed at positions opposite to each of the first exposure position 28 and the second exposure position 37 so as to sandwich the belt-shaped photoreceptor 23, respectively.

FIG. 4 shows a perspective view of the vicinity of the drive roller 18, and shows a motor 38 that can rotate the shaft of the drive roller 18 in both forward and reverse directions.
Directly connected to. Therefore, the belt-shaped photoreceptor 23 is movable in both directions, as shown by arrows C and G in FIG. 3, as will be described later.

Further, as the image reading apparatus applied to the apparatus of the present invention, the apparatus shown in FIG. 1 can be applied, except that the control system of the motor 14 is different as will be described later, so a detailed explanation thereof will be omitted.

FIG. 5 shows an example of the configuration of main parts of the control system according to the system of the present invention. In the figure, X indicates an image reading device, and Y indicates an image display device.

Here, S is located at the position shown in FIG.

It is a projection type photosensor, and is used to detect the position of the carriage 16 driven by the motor 14. A control circuit 40 is supplied with a detection signal from the reflective photosensor S, and issues instructions to the motor controller 41 and the control circuit 51 of the image display device Y in accordance with the detection signal.

motor! 4 is rotatable in both forward and reverse directions and has an encoder ENI. The rotational direction and rotational speed of the motor 14 are detected by the encoder ENI, and the detection signal is fed back to the motor controller 41. 42 is a motor drive circuit, which generates a signal to drive the motor 14 in either forward or reverse direction based on the control of the motor controller F roller 41, and sends that signal to the motor! Supply to 4.

The motor 38 has an encoder EN2, and this motor 38
The rotational direction and rotational speed of the motor are detected by the encoder EN2, and the detection signal is fed back to the motor controller 52. Reference numeral 53 denotes a motor drive circuit, which drives the motor in a rotational direction corresponding to the rotational direction of the motor 38 under the control of the motor controller 52.

It generates a signal to move the motor 38 and supplies the signal to the motor 38.

Next, an example of the operation of the system of the present invention will be described. First, the motor 14 on the image reading device The aerial image 10 is scanned and read by the CCD 11. Along with this reading, on the image display device Y side, the motor 38 is rotated in the forward direction by the motor drive circuit 53 similarly to the motor 14, and the belt-shaped photoreceptor 23 is rotated in the third direction. While moving in the direction of the arrow C shown in the figure, move the CCD II to the outside of the belt-shaped photoreceptor 23 as shown in the arrow A.
Form an image read in the direction.

At this time, the mirror 34 is at the solid line position as shown in FIG. A toner image is formed. Further, this formed image is moved to the display section 28 and becomes visible there.

Here, the carriage 18 on the side of the image reading device X comes to a stopped state at a position facing the photosensor S after the image reading of the frame f of the microfilm F is completed.

Next, when the next frame f of the microfilm F is to be read by the CGD 11, the detection signal of the photosensor S is input to the control circuit 40. Therefore, the control circuit 40 instructs the motor controller 41 to reversely rotate the motor 14, and a signal to that effect is supplied to the motor 14 via the motor drive circuit 42. As a result, the motor 14
starts reversing, the carriage 1B becomes movable in the direction of the arrow as shown in FIG. 1, and C1l:D 11 reads the aerial image 11 while moving in the direction of the arrow.

At this time, an image leading edge synchronization signal and a motor reversal signal are supplied from the control circuit 40 of the image reading device X to the control circuit 51 of the image display device Y via signal lines 54 and 55, respectively. The control circuit 51 to which the image leading edge synchronization signal and the motor reversal signal are supplied reversely rotates with respect to the motor controller 52.

instruct.

In response to this instruction, a signal to that effect is supplied to the motor 38 via the motor drive circuit 53, and the motor 38 starts rotating in reverse, moving the belt-shaped photoreceptor 23 in the direction of arrow G shown in FIG. , C on the outside of the belt-shaped photoreceptor 23.
At C111,1, an image read in the direction of the arrow is formed.

At this time, the mirror 34 is at the broken line position as shown in FIG. 3, the belt-shaped photoreceptor 23 is exposed at the second exposure position 37, and the toner developer 2 is placed at the corresponding position on the opposite side of the exposed area.
A toner image is formed as a visible image. Further, this formed image is moved to the display section 28 and becomes visible on the display section 28.

After the image reading of the frame f of the microfilm F is completed, the carriage 1G on the image reading device X side stops at the position shown in FIG. .

Furthermore, when reading the image of the next frame f on the microfilm F, the detection signal from the photosensor S is not input to the control circuit 40, so the control circuit 10 instructs the motor controller 41 to reverse rotation based on the detection signal. does not give an instruction, and also prevents the control circuit 51 of the image display device Y from sending out a motor reversal signal via the signal line 55.
Therefore, in the image reading device X, the carriage 16 is
The CGDII reads the aerial image 1o while moving in the direction, and the belt-like photoreceptor 23 of the image display device 1Y moves in the direction of the arrow C, and the CGDII reads the belt-like photoreceptor 23 outside the belt-like photoreceptor 23 in the direction of the arrow A. A read image is formed.

In this way, the moving direction of the carriage 1B, that is, the CG
Since the moving direction of the belt-shaped photoreceptor 23 can be changed according to the scanning direction of DII, when the scanning direction of CGDII is in the direction of arrow A in FIG. 1, the belt-shaped photoreceptor 23 moves in the direction of arrow C in FIG. 3. On the other hand, when the scanning direction of the CCD II is in the direction of the arrow in FIG.
3 can be moved in the direction of arrow G in FIG.

Therefore, on the belt-shaped photoreceptor 23 of the image display device Y,
An image corresponding to the frame f on the microfilm F of the image reading device Furthermore, the CGDII can be read in both directions of the carriage 1B, and there is no need to perform a return operation after the reading as in the conventional example, so the overall CCDII reading time is shortened. Ru.

As described above, in this embodiment, the endless belt-like photoreceptor 23 is used as the image-bearing member of the image display device Y, but instead, a plate-like photoreceptor is used as the image-bearing member. , a visual image may be formed on the photoreceptor by moving and scanning the developing device.

Furthermore, although the microfilm reading device shown in FIG. 1 is used as the image reading device, a document image reading device that reads reflected light from a document such as a general document using COD may be used instead.

〔effect〕

As described above, according to the present invention, when the image reading means reads an image over a reciprocating period, the read image is formed on the image carrier, and the formed image is displayed on the display section, Since the moving direction of the image carrier is changed in accordance with the moving direction of the image reading means, display switching operation time is shortened, and in one display section, the image read by the reading means can be displayed as a mirror image or vertically. However, there will be no inconvenience such as an inverted image being displayed.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an example of the configuration of a conventional image reading device, FIG. 2 is a sectional view showing an example of the configuration of a conventional image display device, and FIG.
The figure is a sectional view showing an example of the configuration of an image display device applied to the system of the present invention, FIG. 4 is a perspective view showing an example of the configuration near the drive roller shown in FIG. 3, and FIG. 5 is a system of the present invention. 1 is a block diagram illustrating an example of a configuration of a motor control system of an image reading device and an image display device applied to the image reading device and the image display device. 6... Illumination lamp, 8... Lens, 11... COD C charge coupled device), 14... Motor, 18... Carriage, 23... Belt-shaped photoreceptor, 24... Scanner , 25...f fist θ lens, 27.27A...toner developer, 28...display section, 34...swing mirror, 35.38...mirror, 38...motor, 40.51 ...Control circuit, 41.52...Motor controller, 42.53...
- Motor drive circuit, F...micro film, f...frame, S...photo sensor, X...image reading device, Y...image display device.

Claims (1)

[Scope of Claims] A reading means for reading an image; a first moving means for reciprocating the reading means to scan in forward and reverse directions; and forming an image read by the reading means on an image carrier. an image forming means; a second moving means for reciprocating the image carrier to perform scanning in forward and reverse directions; a display section through which an image formed on the image carrier can be visually viewed; An image reading and display system comprising: a control means for controlling a moving means to change the moving direction of the image carrier in accordance with the moving direction of the reading means.