JPH01297671A - Image display device - Google Patents

Abstract

PURPOSE:To improve the ability of expression by performing color code on the surface of a belt-like recording medium, selectively changing the position of the leading edge of an image and displaying it. CONSTITUTION:The surface of the recording belt 5 turned by conveying rollers 11 and 11 is divided into color areas such as a red area 23, a yellow area 24 and other white area. A photosensor 20 for detecting the position of the recording belt 5 is provided by pinching the end part of the recording belt 5 and outputs a signal SR when a hole part 21 provided on the recording belt 5 passes the photosensor 20. A control circuit 32 controls the respective parts according to the signals from a host computer 33 and an image signal is formed into the image on the surface of the recording belt 5 to be displayed. By constituting the title device so that the position of the leading edge of the image can be selectively changed and displayed, color imagery is added to the image and partial emphasis can be performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an image display device, and in particular, an image display device that forms an image by depositing toner on the surface of a belt-shaped recording medium and observes the image. The present invention relates to such an image display device.

[Prior Art] This type of conventional image display device forms an image by attaching toner to the surface of the belt, which is a recording medium, while rotating the belt, and is suitable for large screen display. Sizes such as AO size and AO size can be provided relatively easily and at low cost. And this device is, for example, A4
By scanning a sized original with a scanner and enlarging it to A1 size through electrical processing, it can be used for meetings, internal bulletin boards, advertisements, etc.

[Problems to be Solved by the Invention] However, in conventional image display devices of this type, since they display still images and display monochrome images, they have poor expressive power and may not be able to emphasize parts or make the viewer's The problem is that it cannot be used in a way that attracts attention.

In addition, in order to increase the expressive power, it is possible to form images using multi-colored toner, but in such a case, it is necessary to attach a complicated leaning device that can select each color separately. However, there is a problem in that toners of different colors mix with each other during cleaning, making it impossible to reuse the toners.

The present invention aims to solve the above problems. That is, an object of the present invention is to provide an image display device that adds a color image and improves expressiveness without using multicolor toner.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention provides a belt-shaped recording medium with a row of electrodes provided facing the recording medium in a direction perpendicular to the rotating direction of the recording medium. In an image display device in which toner is attached to the surface of a recording medium by applying a voltage to the recording medium, the surface of the recording medium is color-coded, and an image recording start position is specified with respect to the color-coded position. a position detecting means for detecting the position of the recording medium in a rotating direction; and a control means for controlling recording of an image according to signals from the specifying means and the position detecting means. .

[Function] According to the present invention, the surface of the belt-shaped recording medium is color-coded, and the leading edge position of the image can be selectively changed and displayed. Compared to displaying only colors, the image has a colored image and can be partially emphasized.

[Embodiment] FIG. 1 shows a recording medium that is the main part of an embodiment of the present invention.

In FIG. 1, reference numeral 5 denotes a recording belt, which is a recording medium, and is rotated by conveyance rollers it, it. The surface of the recording belt 5 is color-coded into a red area 23, a yellow area 24, and other white areas. Further, 20 is a photo sensor, 21 is a hole, and a frame indicated by a broken line 22 is a display area.

FIG. 2 shows an embodiment of the present invention, that is, shows the overall configuration.

In FIG. 2, a recording electrode (see FIG. (not shown) and a pair of transport rollers 11. which are recording medium supporting members. A part of the orbit of the recording belt 5 rotated by it is made to face the electrode, and a recording control section (not shown) electrically connected to the recording electrode receives a signal from an input device such as an image scanner. The application of voltage to the recording electrodes is turned on and off according to the input.

The recording belt 5 also has an insulating layer facing the outer side of its rotational track, and a conductive layer (both not shown) facing the inner side of the rotational track.

Such a configuration is installed inside the case-like body frame 12 so as to form a vertically long rotational track as shown in the figure, and furthermore, the recording belt 5 is placed inside the body frame 12 on the back side of the rotational track of the recording belt 5 inside the body frame 12. A cleaning device 8 having a magnet 9 is provided at the position of the cleaning device 8, which erases the displayed image formed on the surface of the recording belt 5 which rotates in the direction of the arrow in the figure, so that it can be removed by the next recording electrode. The surface of the recording belt 5 is cleaned so that an image writing operation can be performed.

In the display device having such a configuration, the toner 1 is applied to the recording belt 5 in response to the application of a signal voltage to the recording electrode.
The operation of moving and adhering to or not adhering to the surface is repeated, and a predetermined image is formed.

By the way, in the display device shown in FIG. 2, a rotating magnet (not shown) housed inside the non-magnetic cylinder 3 is connected to the motor 1 via the timing belt 17
As shown in the figure, the motor 17 is disposed on the back side of the toner container 10 (on the side opposite to the display opening in the main body frame 12).

Further, a stepping motor 18 for rotating the recording belt 5 is interlocked with the rotating shaft of the conveying roller 11 via a plurality of gears 18° (or a timing belt), and the stepping motor 18 is also connected to the rotating shaft of the conveying roller 11. Like the rotation motor 17, it is disposed at the rear of the toner container 10, as shown in the figure.

Reference numeral 16 shown in FIG. 2 is a scattering prevention section serving as an enclosure for preventing the toner 1 removed from the surface of the recording belt 5 by the cleaning device 8 from scattering within the main body frame 12. In the example, it is integrated with the toner container 10. 15 is the cleaning device 8;
A distal end flange portion of a scattering prevention portion 16 extending from the side toward the rotational upstream side of the recording belt 5 is shown, and 14 represents a back plate facing the cleaning device 8 with the recording belt 5 in between.

Reference numeral 20 denotes a photosensor for detecting the position of the recording belt 5. As shown in FIG. When the belt 5 rotates and passes through the holes 21 provided in the recording belt 5, a signal SR is generated.

FIG. 3 is an electrical block diagram of the device shown in FIG. 2.

In FIG. 3, reference numeral 31 denotes an electric drive circuit that applies voltage to predetermined terminals of the recording electrodes 30 arranged in a line. Further, numeral 33 is a host computer composed of a personal computer or the like, which serves as a specifying means, and image information read by a scanner or the like is temporarily stored.

Then, when the operator selects a position on the recording belt 5 at which the leading edge of the image should be positioned, an image signal is sent to the control circuit 32 together with the position data. This control circuit 32 controls various parts according to signals from a host computer 33 to form and display an image signal on the surface of the recording belt 5.

Furthermore, the control circuit 32 controls the stepping motor 1 when the power is turned on.
8 to rotate the recording belt 5, and when the signal SR from the photosensor 2o is sent out with the rotation, the count value of the built-in counter is reset to O,
Thereafter, one count is added every time the stepping motor 18 is driven by 10 pulses. At that time, a signal SR is sent from the photosensor 20, and the count value is reset. Then, when the count value reaches 700, the recording belt 5 makes exactly one revolution. In addition, 297 counts, that is, 2970 pulses of the stepping motor 18 are set to be displayed on the main body display. For example, in the case of an A4 size document, the vertical length is 297.
Image formation is performed with mm corresponding to 2970 pulses.

That is, by operating the recording electrode 30 every pulse, an image is formed at a dot density equivalent to 10 dots per 1 mm of an A4-sized document.

FIG. 4 is a diagram schematically showing the relative relationship between the count value of the counter and the recording belt 5.

FIG. 4 shows the relationship between the recording electrode 30 and the recording belt 5 when the hole 21 is at the position of the photosensor 20 and the recording belt 5 is at the position where the signal SR is emitted, that is, when the count value is 0. It shows.

The numbers marked with 0 in FIG. 4 represent count values. For example, when the stepping motor 18 is driven to the count value 297, the position (297) on the recording belt 5 just reaches the position of the recording electrode.

In addition, in FIG. 4, for the sake of explanation, the recording belt 5 is unfolded on a flat surface and is continuously exposed in the same way as when it is further rotated, and the yellow areas 24 are displayed in two places. However, they are the same.

Furthermore, 22 shown in FIG. 4 relatively indicates the display area of the display section of the main body, and an area corresponding to 297 counts from a position corresponding to 80 counts from the recording electrode position is displayed. That is, the count value is from 0 to 297
The image written during this period has a count value of 377, which is 297 plus 80, and if the stepping motor 18 is stopped, it will stop at the position of the display area 22.
In other words, the image is displayed on the display section.

The operation of displaying a read image in the apparatus of this embodiment configured as described above will be described.

FIG. 5 shows the flowchart.

In step S1, when the document is read and the operator specifies the image leading edge position a from the keyboard, etc., in step S2, the stepping motor 18 is activated,
When the recording belt 5 is rotated and the count value A becomes a, writing is started in the Stellar tube S3, and when the count value A becomes a+297, the writing is finished and the recording belt 5 is rotated in step S4. When the count value A reaches a+297+80, in step S5,
Stop all operations and enter the display state.

For example, when displaying a document as shown in Figure 6(a), if the operator specifies O as the leading edge position of the image,
Since the count value is written from 0 to 297, an image is formed and displayed on the entire white background as shown in FIG. 6(b). If 300 is designated as the image leading edge position, a red area 23 is displayed at the top as shown in FIG. 6(c). If you specify 350, as shown in Figure 6(d), the area 23 whose upper part is red,
The image is displayed with a yellow area 24 at the bottom.

In this way, when the leading edge position of the image is designated, the recording start position on the recording belt 5 is controlled.

That is, since the background color of the image can be selected, display variations are expanded.

In the above embodiment, the recording belt 5 is color-coded in stripes, but circles or squares may be used, or landscapes or the like may be printed in color.

[Effects of the Invention] As described above, according to the present invention, the surface of the belt-shaped recording medium is color-coded and the leading edge position of the image can be selectively changed and displayed. Compared to displaying only colors and toner colors, this has the effect of improving expressive ability by adding a color-like image, and by changing the background color of the necessary area, it can be emphasized.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main parts of an embodiment of the present invention;
FIG. 2 is a sectional elevational view showing the entire device, FIG. 3 is an explanatory diagram showing the device in FIG. 2 as an electrical block diagram, and FIG. 4 is an explanatory diagram of the operating principle of the device in FIG. 2. Fig. 5 is an explanatory diagram showing the operation of the device shown in Fig. 2 in the form of a flowchart, and Fig. 6 (
2a), 2b, 2c, and 2d are explanatory diagrams showing examples of display by the apparatus of FIG. 2; 1... Toner 5 &... Recording Rad 20...
・Photo sensor 21...hole 22...display area
23... Red area 24... Yellow area Figure 2 1 Figure 4

Claims (1)

[Claims] 1. Toner is attached to the surface of the recording medium by applying a voltage to the recording medium using a row of electrodes provided facing the recording medium in a direction perpendicular to the rotating direction of the belt-shaped recording medium. In the image display device, the surface of the recording medium is color-coded, and a specifying means for specifying an image recording start position with respect to the color-coded position, and a position detecting means for detecting a position of the recording medium in a rotating direction. and a control means for controlling recording of an image according to signals from the specifying means and the position detecting means.