JPS63155177A - Image display device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to an image display device using, for example, a magnetic stylus recording method, and the present invention relates to an image display device using, for example, a magnetic stylus recording method, The present invention relates to an image display device that reproduces and displays stored information stored in a disk device, a microfilm device, etc. as a visible image.

(Conventional technology) Conventionally, CRT display, LCD CP & crystal display7
2. Description of the Related Art A variety of image display devices, such as a PDP (7' lasma display/A panel), and an ELD (electroluminescence display), have been developed and put into practical use.

Recently, compared to these image display devices, the structure is simpler,
The development of image display devices using the magnetic stylus recording method disclosed in, for example, Japanese Unexamined Patent Publication No. 59-3462, which is capable of displaying high-quality images, is being developed and put into practical use. .

The magnetic stylus recording method is one of the electrostatic recording methods, and the basic principle of the magnetic stylus recording method will be explained in detail below with reference to FIG. 3. In FIG. 3, 1 is an image conveyance section, 2 is a developing device (toner supply section), and 3 is an image recording section. The image conveyance section 1 includes an electrically conductive drum 4 that is rotationally driven in the right direction in the figure, and an insulating recording sheet 5 formed on the outer peripheral surface of the drum 4. The drum 4 is connected to ground potential.

The developing device 2 includes a conductive sleeve roll 6 which is disposed close to the drum 4 at a predetermined position and is driven to rotate rightward in the figure, and a conductive sleeve roll 6 which is disposed on the inner peripheral side of the sleeve roll 6 and whose surface polarity is The toner hopper arm 9 includes a magnet roll 7 which is circumferentially polarized into multiple polarities and is rotationally driven in the left direction in the drawing, and a toner hopper arm 9 which is disposed close to the sleeve roll 6 and accommodates conductive magnetic toner 8. A developing bias voltage is applied to the sleeve roll 6 from a DC source 10 .

The toner hopper 9 has an opening toward the sleeve roll 6, and can always supply the conductive magnetic toner 8.

The image recording unit 3 includes a recording head I which is arranged near the drum 4 with a predetermined gap from the sleeve roll 6, and a recording head 11 fixed on the recording head 11 so that its tip is close to the drum 4. A stylus electrode 12 is formed by a large number of needle-like electrodes each having a recording area of 10 μm width arranged in the axial direction of the drum 4, and this stylus electrode 120 is arranged facing each other with a predetermined gap on both sides and is driven to rotate. It consists of two sleeve rolls 13, 24 and fixed magnets 15, 16 arranged on the inner peripheral side of each sleeve roll 13, 14 so that the same poles face each other.

Each needle-like electrode of the stylus electrode J2 is made of, for example, Fe-N.
It is made of conductive ferromagnetic material such as i6 or Fe-Co. Further, each needle electrode of the pole 12 of the stylus 1 is connected to an electrode drive circuit (not shown), and when these needle electrodes are turned on, a signal voltage having the same value as the developing bias voltage is applied, and when they are turned off, a signal voltage of the same value as the developing bias voltage is applied. It is designed to be connected to ground potential.

In such a structure, when the magnet roll 7 of the developing device 2 is rotated to the left in the drawing and the sleeve roll 6 is rotationally driven to the right in the drawing, the conductive magnetic toner 8 in the toner hopper 9 is transferred to the sleeve roll 6. It adheres to the surface of the sleeve roll 6 and is conveyed in the direction of rotation of the surface of the sleeve roll 6 while spreading uniformly. At this time, since a developing bias voltage is applied to the sleeve roll 6, the conductive magnetic toner 8 attached to the surface of the sleeve roll 6 is positively charged. When this positively charged conductive magnetic toner 8 on the surface of the sleeve roll 6 is conveyed to a position close to the drum 4, since the drum 4 is connected to the ground potential, the surface of the opposing drum 4 is is charged with a negative charge corresponding to the positive charge of the conductive magnetic toner 8. As a result,
The conductive magnetic toner 8 on the surface of the sleeve roll 6 is uniformly adhered to the surface of the recording sheet 5 formed on the drum 4 which is rotationally driven in the right direction in the figure, and is transported by the recording sheet 5. .

On the other hand, in the image recording section 3, the magnetic field generated by the fixed magnets 15 and 16 causes the stylus electrode 12 to record (see) 511C.
It is strongly magnetized in the direction toward which it is directed. As a result, a large magnetic field directed toward the recording sheet 5 is generated in the recording area at the tip of the stylus electrode 12. Therefore, the conductive magnetic toner 8 that has been conveyed to the recording area by the recording sheet 5 is strongly influenced by this magnetic field and is strongly attracted toward the recording head 11, and as shown in FIG. A chain 8a of conductive magnetic toner 8 is placed in the recording area between the electrode J2.
form. As a result, conductive magnetic toner 8 is deposited in the recording area.
A conductive path is formed. When the needle-like electricity of the stylus electrode 12 is turned on while maintaining this state, a voltage is applied to the needle-like electrode at this part, so a positive charge is injected into the conductive magnetic toner 8, and at the same time, the drum 4 is charged with a positive charge. An opposite negative charge is induced and an electric field is generated within the recording sheet 5. The conductive magnetic toner 8 is moved onto the recording sheet 5 by the force of this electric field.
It is drawn to the side and remains on the surface of the recording sheet 5. On the other hand, when the needle electrode of the stylus *pole 12 is turned off, the needle electrode is connected to the ground potential at this portion, and the four-torque magnetic toner 8 loses its charge. As a result, the conductive magnetic toner 8 that has lost its charge is transferred to the fixed magnet 1.
5.16 is attracted to the stylus electrode Jl side, away from the surface of the recording sheet 5, and the stylus electrode 1
Move to side 1. That is, a desired toner image is formed on the surface of the recording sheet 5 by selectively turning on and off each needle electrode of the stylus electrode J2 according to the image information to be recorded.

The conductive magnetic toner 8 that has moved to the stylus electrode JJ side is transferred to the sleeve roll 13 by the magnetic force of the fixed magnets 15 and 16.
, 14. The sleeve rolls 13 and 14 are driven to rotate 9, and the conductive magnetic toner 8 adhering to their surfaces is scraped off by a toner scraping member (not shown) and stored in a toner collection container (not shown) for reuse.

FIG. 5 shows an example of a conventional image display device using the above-described magnetic stylus recording method. This image display device includes an apparatus main body 191, an image conveyance section 20, a developing device (toner supply section) 21, and an image recording section 2.
2, pack ground cleaning section 23, all cleaning section 24, image display section 25, and toner transport section 2
The main parts are comprised from 6 onwards. The image display section 25 is arranged on the front side of the main body 19, and the image recording section 2
2. The pack ground cleaning section 23 and the all cleaning section 24 are arranged in a vertical relationship on the back side of the main body 19 in the following order from the top: the all cleaning section 24, the developing device 21, the image recording section 22, and the background cleaning section 23. The image transport unit 20 is disposed along the image conveyance unit 20 .

The image conveying section 20 includes an endless sheet-like recording belt 27 with a white surface, which is placed under tension around a drive roller 28 and idle rollers 29, 30, and 31.

The recording belt 27 is driven, for example, in the direction of the arrow in the figure, by rotationally driving a drive roller 28 by a motor (not shown).

For example, the recording belt 27 is made by coating a conductive layer on a flexible plastic film containing a white pigment, and then laminating an insulating layer made of polyethylene or polyester, which has a high electrical charge retention ability, on top of the conductive layer. The conductive layer is connected to ground potential. That is, the recording belt 27 has the same function as the drum 4 and recording sheet 5 in FIG. 3.

The developing device 2 has the same configuration as the developing device 2 shown in FIG.
3 and the magnet roll 34 contain conductive magnetic toner 35.
The toner collection container 36 contains the toner.

The image recording section 22 also has the same configuration as the image recording section 3 in FIG. 3, and includes a recording head 37, a stylus electrode 38, sleeve rolls 39 and 40, and fixed magnets 41 and 42. Note that the idle roller 29 is disposed at a position corresponding to the tip of the recording head 37, and the idle roller 29
The recording belt 27 is supported such that a predetermined gap is formed between the surface of the recording head 37 and the tip of the recording head 37.

The pack ground cleaning section 23 cleans the recording belt 27.
A fixed sleeve roll 43 disposed close to the sleeve roll 43, and a magnet rotatably driven to the left in the figure, disposed on the inner peripheral side of the sleeve roll 43 and having a surface polarized to multiple polarities in the circumferential direction. A toner collection container 45 disposed below the roll 44 and containing the conductive magnetic toner 35
It consists of. The toner collection container 45 also accommodates the electrically conductive magnetic toner 35 scraped off from the sleeve rolls 39 and 40 in the image recording section 22.

The all-cleaning section 24 includes a sleeve roll 46 that is disposed close to the recording belt 27 and is rotationally driven in the right direction in the figure, and is disposed on the inner peripheral side of this sleeve roll 46, and has a surface polarity that varies in the circumferential direction. The toner collection container 4 containing the conductive magnetic toner 35 is connected to a magnet roll 47 which is polarized and rotated to the left in the figure.
It is located within 8. Note that the sleeve roll 46 is connected to ground potential.

The image display section 25 is provided with a transparent display window (such as transparent glass) 49 so that the surface of the recording belt 27 on which an image has been formed by the image recording section 22 can be viewed from the outside using reflected light. It will be set up.

The toner transport section 26 is connected to the pack ground cleaning section 2.
3 and the toner collection container 4 of the all cleaning section 24
5. Toner accumulation section so, 5x provided at one end of 48
A spiral roll 52, 53 which is provided with Vc and driven to rotate to collect the conductive magnetic toner 35, and a toner accumulating portion 5 provided at one end of the toner collection container 36 of the developing device 2J.
4, a rotationally driven spiral roll 55 that conveys the conductive magnetic toner 35 along the axial direction of the sleeve roll 33 and uniformly supplies it thereto, and a toner accumulation section of the all cleaning section 24. A toner conveying belt 56 transports the conductive magnetic toner 35 from No. 5 to the toner accumulating section 54 of the developing device 21, and a toner conveying belt 56 conveys the conductive magnetic toner 35 from the toner accumulating section 50 of the pack ground cleaning section 23 to the toner accumulating section 54 of the developing device 2. It consists of a toner conveying belt 57 that conveys the toner 35. The toner conveying belts 56 and 57 are
For example, it is an endless type made of magnetic material, which is placed around rotating rollers with tension applied to them.
The conductive magnetic toner 35 is conveyed while adhering to the surface of the magnetic material.

In this configuration, a toner image is formed on the surface of the running recording belt 27 by the developing device 2 and the image recording section 22, similar to the operation based on the basic principle described above.

Then, in the pack ground cleaning section 23,
The conductive magnetic toner 35 that cannot be moved to the recording head 37 side by the magnetic force of the fixed magnets 4 and 42 in the image recording section 22 and has no charge and remains on the surface of the recording belt 270 is transferred to the magnetic roll 44. Due to the magnetic force, this conductive magnetic toner 3 separates from the surface of the recording belt 27 and adheres to the surface of the sleeve roll 43, and furthermore, because the magnet roll 44 is rotationally driven in the left direction in the figure, the conductive magnetic toner 3
5 is conveyed rightward in the figure on the surface of the sleeve roll 43, and is removed from the toner collection container 4 by a toner scraping member (not shown).
Scraped off within 5 minutes. In this way, the unnecessary conductive magnetic toner 35 on the surface of the recording belt 27 is removed, and the toner image formed with only the necessary conductive magnetic toner 35 remaining remains attached to the surface of the recording belt 27. The display unit 251C is transported and an image is displayed.

After the image display, the toner image is conveyed to the all-cleaning section 24 while remaining attached to the surface of the recording belt 27. Then, in the all-cleaning section 24, the conductive magnetic toner 35 smoothed and adhered to the surface of the sleeve roll 46 by the magnetic force of the magnet roll 47 comes into contact with the conductive magnetic toner 35 forming the toner image on the surface of the recording belt 27. The sleeve roll 46 is connected to the ground potential, so the conductive magnetic toner 35 on the surface of the recording belt 27 loses its charge, and the magnetic force of the magnet roll 47 causes the recording belt 27 to become electrically conductive. This conductive magnetic toner 35 is attached to the surface of the sleeve roll 46 away from the surface, and furthermore, because the magnet roll 47 and the sleeve roll 46 are rotated to the left in the figure and to the right in the figure, respectively. is conveyed on the surface of the sleeve roll 46 in the right direction in the figure, and is scraped off into the toner collection container 48 by a toner scraping member (not shown).

In this way, the recording belt 27 from which the conductive magnetic toner 35 (toner toner image) has been removed is returned to the developing device 27.
1, and a similar image display operation is performed.

On the other hand, in the pack ground cleaning section 23 and the all cleaning section 24, the toner collection container 45.4
The conductive magnetic toner 35 scraped off in the toner transport belt 56 . 8 is collected in the toner collecting portion 50 . 57 , the toner is conveyed onto the toner accumulation section 54 of the developing device 21 .

Then, the conductive magnetic toner 35 on the toner conveying belts 56 and 57 is scraped off onto the toner accumulating portion 54 of the developing device 21 by a toner scraping member (not shown). Conductive magnetic toner 35 scraped off by the toner accumulation section 54 of the developing device 2
is the slope roll 33 by the spiral roll 55.
It is conveyed in the axial direction of the sleeve roll 33, and is uniformly fed onto the sleeve roll 33 to be used again.

(Problems to be Solved by the Invention) However, in the past, unfixed images were formed and displayed on the front side of the recording belt facing the image display window, so static electricity generated in the image display window However, there has been a problem in that the toner forming the image scatters and adheres to the image display window, making the dirt display window difficult to see.

[Structure of the Invention (Means for Solving the Problems)] In order to solve the above-mentioned problems, the present invention includes a recording material that is run and whose front side faces the display window, and a recording material that is provided on the back side of the recording material and that The t￥f feature is that it is equipped with an image forming means for forming an unfixed image using a powder developer on the back surface.

(Function) By using the above method, a recording material is interposed between the display window and the unfixed image, and the unfixed image is removed! This prevents the developer that forms the ili image from adhering to the display window.

(Embodiment) The present invention will be described below with reference to an embodiment shown in FIGS. 1 and 2. Note that the same parts as those shown in FIG. 5 are given the same numbers, and the explanation thereof will be omitted.

In the figure, reference numeral 61 denotes a recording belt as a recording material, and this recording belt 61 is made by coating a four-electrode layer between two transparent sheets with high insulating properties and a charge retention ability.

Furthermore, in the lower part of the apparatus main body 19, a developing device 63 and an image recording section 64 constituting the image forming means 62 are arranged, as well as a pack ground cleaner 65 and an all cleaner 66. These developing device 63, image recording section 64, pack ground cleaner 65, and all cleaner 66 are arranged to face the back side of the recording belt 61 so as to form an unfixed image on the back side of the recording belt 6. It has become.

Further, a conductive pack yf? as a back body facing the image display window 25 and housing the white pigment? -1'67 is provided, and the recording belt 61 is run between this conductive backmate 67 and the image display window 25. The recording belt 6 has its front side facing the image display window 25, and its back side facing the conductive backboard 67. Recorded by the conductive board)
61 (D unfixed image is clearly displayed with white background.

When the developing magnet roller 33 of the developing device 63 rotates, the back side of the recording belt 61 is uniformly coated with toner as a powder developer. Charge is injected into the coated toner from the back side of the recording belt 6) by the stylus head 38 of the image recording section 64, forming a mirror toner image. Then, this formed toner image passes through the pack ground cleaner 67 and is displayed on the image display window 25.

As described above, since the toner image is formed on the back side of the recording belt 6J, the toner forming the image is unlikely to scatter even if it is affected by static electricity generated in the image display window 25, and even if it does scatter, It will not be blocked by the recording belt 6J and attached to the image display window 25.

Also, inside the recording belt 61, a developing device 63, an image recording section 64, a pack ground cleaner 65, and an all cleaner 6 are provided.
6, the space can be used effectively.

By the way, generally, the repose angle of toner is 60°,
On slopes of 60° or more, the toner slides down the slope due to its own weight. As shown in Figure 1, the holes/
By setting the slope of J-68 to 60 degrees or more, the toner collected in the all cleaner 66 and the puncture ground cleaner 65 is simply scraped off by the sweeping blade 69 and falls down the slope under its own weight.

In this manner, by arranging each device inside the recording belt 61, the angle of repose can be effectively utilized and toner recycling becomes possible.

Note that when forming "A f&" on the back surface of the recording belt 61, it is necessary to support the recording belt 61 so as not to disturb the image.Therefore, as shown in FIG. That is, the support shaft 7
Idlers 71 and 71 were provided on both ends of the belt, and a francif 2°72 was formed on these idlers 71 and 72 to prevent belt meandering. Mydra-71, 71 above
supports the outside of the toner image forming area of the recording belt 27, and the seven lunges 72, 72 are in contact with the end surface of the recording belt 6. As a result, the recording belt 27 is supported only outside the toner image forming area without meandering, and the recording belt 61 can be run without disturbing the image.

Note that the present invention is not limited to the above-mentioned series,
The back door drawer may be constructed from a self-luminous element such as an EL. According to this, good image recognition is possible without being affected by the environment in which the device is used.

[Effects of the Invention] As explained above, according to the present invention, the powder developer of the undefined image formed on the recording material does not adhere to the display window, and the image can be displayed satisfactorily from the display window. This has this effect.

[Brief explanation of the drawing]

1 and 2 show an embodiment of the present invention,
Fig. 1 is a configuration diagram showing the image display device, Fig. 2 is a perspective view showing the support structure of the recording belt, and Fig. 3 is a magnetic
A vertical side view of a companion to explain the basic principle of the stylus recording method, Figure 4 is a vertical side view showing an enlarged view of the main parts in Figure 3, and Figure 5 is a vertical side view of a conventional image display device. It is. 25... Display window, #-... Recording material (recording belt), 6
2... Image forming means, 67... Back plate. Applicant's agent Patent attorney Suzue Takehiko Figure 1 Figure 2 Figure 3 Figure 5

Claims (4)

[Claims] (1) A recording material that is run and faces the display window with its surface side facing the display window;
An image display device comprising an image forming means provided on the back side of the recording material and forming an unfixed image on the back side using a powder developer. (2) The image display device according to claim 1, wherein the recording material is formed of a transparent member. (3) The image display device according to claim 1, characterized in that a back body is provided on the back side of the recording material. (4) The image display device according to claim 1, wherein the image is formed by a magnetic stylus recording method.