JPH0451164A - image display device - Google Patents

Abstract

PURPOSE:To make the format of image data transmitted to a picture display device uniform and to facilitate control by changing and displaying the list of the image data on the picture display device side. CONSTITUTION:A control means B1 is constituted of a controller 105 and controls the readout and the write of an image information storage means A1. A list changing means C1 is constituted of the controller 105, a readout controller 106 for a side A, a readout controller 107 for a side B and a parallel- serial conversion circuit 104 and changes the list of the displayed image information to any state obtained by reversing from top to bottom, from right to left, and from top to bottom and from right to left base on positional relation between the moving direction of a recording medium 217 and a display surface. Then, the list of the image data is changed and displayed on the picture display device side. In the case of transmitting the data, a host need not consider the development and the recording of the image data, thereby making the format of the image data transmitted to the picture display device uniform and facilitating the control.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an image display device, and particularly to an image display device that displays an image on a heald-shaped image recording medium.

[Conventional technology]

FIG. 5 is a side sectional view of a conventional image display device, and FIG. 6 is a diagram showing a state in which toner is applied in accordance with image information.
Fig. 7 shows a state in which the image forming means is located above the display section, and Fig. 8 shows A when direct data is sent in the conventional example.
, a diagram showing surface B, and FIG. 9 is a perspective view showing the display of surfaces A and B in FIG. 6. FIG. 9(a) is a view seen from surface A, and FIG. It is a view seen from the back side B.

In FIG. 5, an endless belt-shaped recording medium 217 is wound between a pair of rollers 211 and 219, and an image forming means 218 is positioned opposite one of the rollers 219.
This is provided. This image forming means 218 is
The material disclosed in Japanese Patent No. 46707 or the like may be used.

That is, as shown in FIG. 6, conductive magnetic toner 7 is conveyed around the outer periphery of non-magnetic cylinder 6 by the magnetic field of rotating magnet 8. As shown in FIG. At this time, a voltage corresponding to the image information is applied by the recording control section 1° to the recording electrodes 9 densely arranged along the axial direction on the non-magnetic cylinder, and toner is attached in accordance with the image information. Then, an image is displayed (hereinafter, the long axis direction of this nonmagnetic cylinder will be referred to as the main scanning direction, and the moving direction of the recording sheet will be referred to as the sub-scanning direction).

The image displayed on the recording medium 217 (FIG. 5) is
A display section 213 formed on the front and rear surfaces of the device main body,
212 respectively.

The recording medium 217 is provided with a cleaning mechanism 214 as an erasing means for erasing the image displayed on the recording medium 217.

There are various forms of this apparatus, such as a case where the image forming means is located above the display section as shown in FIG. Incidentally, in Figure 7 of the drawing, 1 is toner, 2 is a rotating & ff material, 3 is a non-magnetic cylinder, 4 is a recording electrode, 5 is a recording medium, 6 is a first display surface, and 7 is a second display surface. It is.

As mentioned above, the characteristic of the image display device is that in order to form a screen line-by-line, the image data recorded on the recording medium must be reversed, depending on the moving direction of the recording electrodes and the recording medium. . This is explained in detail in Figure 8 below.

This will be explained using FIGS. 9 and 3.

FIG. 8 shows a conventional image display device.

The display surface displayed in the front of FIG. 8 is called the A side, and the back side is called the B side.

For example, in an image display device as shown in FIG. 8 of the drawings, images are formed on the display surface A and the display surface B in line sequence when the recording medium 5 comes out from the image forming means.
When the data is read from an image reading device or the like and sent directly to the image forming means, the display screen B is displayed as shown in FIG.
are displayed upside down, left and right, compared to display screen A.

In order to display the same data on both sides A and B, the data read by the image reading device must be imported into another memory, for example, the host, and when outputting to 8 screens, the data must be sent in the opposite directions (vertically, horizontally, and vertically). A normal screen as shown in Figure 3 could not be obtained.

In this way, the display screen of the image display device is created by the host rearranging the image data taking into consideration the type of the image display device, generating several types of data, and sending the generated data to the image forming means of the image display device. I had to.

Similarly, in the case of FIG. 7 in which the image forming means is located on the display section, it is no longer necessary to display the data sent from the controller by rearranging them vertically and horizontally.

[Problem to be solved by the invention]

As explained above, in conventional image display devices, when the host sends data, the image recording device must consider how the image data will be developed and recorded on the recording medium. There were some problems.

That is, there was a problem in that the image data had to be rearranged vertically and horizontally and then sent.

Furthermore, when controlling multiple image recording devices, it is necessary to prepare image data corresponding to the display surface in order to display one type of screen, which makes controlling the image display devices difficult. There was a problem.

This invention was made to solve the above problems, and the image display device side converts and displays the arrangement of image data, so that when the host sends data,
To facilitate control by unifying the format of image data sent to an image display device without having to consider development and recording of image data.

(Means for Solving the Problems) Therefore, in the present invention, a belt-shaped recording medium, a conveying means for moving the recording medium in the longitudinal direction, and a coloring substance attached to the recording medium according to image information are provided. an image forming means for forming an image by displaying the image information; an image information storage means for storing the image information; a control means for controlling reading and writing of the image information storage means; The above object is achieved by an image display device including a rearranging means for rearranging media according to the moving direction of the medium and the positional relationship of the display surface.

Further, in the above invention, the rearranging means attempts to achieve the above object by using an image display device which is a means for arranging the image information to be displayed upside down, upside down, right and left, or upside down and left and right. It is.

[Effect]

In the image display device of the present invention, the recording medium is moved in the longitudinal direction by the conveying means, the image forming means forms an image by depositing a colored substance on the recording medium according to the image information, and the image information storage means forms the image. The control means reads the image information storage means and controls writing, and the rearrangement means arranges the image information to be displayed according to the moving direction of the recording medium and the positional relationship of the display surface. exchange.

Further, in the image display device according to the present invention, the rearranging means rearranges the images upside down, upside down left and right, or upside down upside down and left right.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

It is assumed that the image display device of this embodiment has two screen displays (side A and side B) as in the conventional example.

Figure 1 is a configuration diagram of an image display device according to an embodiment of the present invention, Figure 2 is a timing chart showing the operation timing of this embodiment, and Figure 3 is a perspective view showing the state of image display according to this embodiment. 4 are diagrams showing operation control of a plurality of types of image display devices of the present invention.

In FIG. 1 of the drawings, A1 is an image information storage means;
It is composed of a page memory (described later) 103 and is means for storing image information. B1 is a control means, controller 1
05, and is means for controlling reading and writing of image information storage means A1. C1 is a sorting means, and controller 105. It is composed of a readout controller 106 for side A, a readout controller 1o7 for side B, and a parallel-to-serial conversion circuit 104, and the arrangement of image information to be displayed can be arranged upside down, left or right, depending on the moving direction of the recording medium 217 and the positional relationship of the display surface. This is a means for rearranging the items either upside down or upside down, left or right (details will be described later).

101 is an interface, 102 is a serial-parallel conversion circuit (8Bit), 104 is a parallel-serial conversion circuit (8Bit), and controller 105 is an A-side read controller 106. It selects one of the B-side readout controllers 107 and controls other operations of this embodiment.

108 is a 1-line shift register, and 109 is a recording electrode driver. Here, details of the interface 101 will be explained.

The interface 101 is a one-way interface from a host (not shown), and the meaning of each signal shown in FIG. 1 is as shown in Table 1 below, which corresponds to FIG. 2 of the drawing.

The format of the data in Table 1 is 1 line with 1680 pixels, and 1 pixel is I
It is assumed that the data is transferred in synchronization with the clock of MH2.

Next, the operation of this embodiment will be explained using FIG.

Image data is sent from a host (not shown) through an interface circuit 101 to a serial-parallel conversion circuit 102.
After the data is converted, it is determined whether the data sent by the controller 105 is a command or image data.

Serial-parallel circuit backs up 8 bits at a time
Output as Byte, the first input bit is M
Become SH.

The controller 105 uses a command to determine whether the sent image data is to be displayed on side A or side B.
Either the side read controller 106 or the B side read controller 107 is selected.

The sent data is temporarily recorded in the page memory 103. The controller 105 receives the STB sent from the host.
The page memory 103 is activated by the clock signal generated from the signal.
Control the timing of recording.

After storing the current image data in the page memory 103, the controller 105 determines whether to display the image data on the A side or the B side according to the command from the host as described above. Select the address generator for reading side A or the address generator for reading side B, and read the memory.

As mentioned above, the B-side display screen requires the sent image data to be turned upside down, horizontally and vertically, so the B-side reading counter (built into the controller) is the A-side reading counter (built into the controller). Compared to this, the configuration is such that the read address is generated in the opposite way.

Next, the operation of this embodiment will be explained using FIG.

The address counter A is for the down screen and is an up counter. The controller 105 sends a clock synchronized to the STB (Table 1) to the address counter A to store the eight backed-up image data converted by the serial-parallel conversion circuit 102 in the page memory 103. Image data is recorded in 103.

Since one line of data has 1680 pixels, one line of image data is stored in page memory 103 as 210 bytes of data. Since the image data is recorded in the A counter, if you want to display this image data on the next screen, the counter A reads the data from the page memory, converts it in the parallel-serial conversion circuit 104, and then converts it into the shift register. The data is sent to 108 and displayed on the recording screen.

Address counter B is a counter for eight screens.

This counter is the A counter for 8 screens and page memory 103.
This is a down counter configured to read data in descending order from the last address of the image data.

In order to generate addresses for 8 screens, after the address after R of data is input from the controller IO5, the address is sequentially decreased by the clock from the controller 105 and the data is read from the page memory 103.

The read data is 8 pixels arranged and the left and right sides are not reversed, so when the parallel-serial conversion circuit 104 -F
Shift register 108 with reverse bit and lower bit
Send data to. This operation allows the image to be developed on the recording medium in the opposite direction.

Next, a sequence for displaying images for eight screens on the image display device will be explained using Table 1, FIG. 1, and FIG. 2.

In this embodiment, the standard format is adapted to the display surface A.

In Figure 2 of the drawing, the host first connects to interface 1.
01 (Figure 1) to inform the image display device that a command is to be sent to the image display device.
Make it OW. Thereafter, the host sets READY to LOW and transmits a status indicating that the screen to be sent from now on is data for 8 screens to the image display device in accordance with the STB.

Next, the host sends COM/DATA to notify the image display device that the data to be sent is image data.
Set to HIGH. Then the host puts READY in LO
Set to W and transmit data for 8 screens to the image display device in accordance with STH. At this time, READY is set to HIGH once for each line, and EOL (an image data reception confirmation signal for one line, not shown) is set to LOW to notify the image display device of the delimitation of one line of data.

After sending the last line of image data, set EOP (one screen data end confirmation signal, not shown) to LOW and turn 1.
Notifies the end of screen image data. In this way,
The image display device converts the sent image data into 8-bit data using a serial-parallel converter and sequentially stores the data in a page memory. When the EOP becomes LOW, the image display device sequentially reads one page of image data from the page memory 103 using eight screen reading addresses in reverse order, and converts the data one line at a time using the parallel-to-serial converter 104. Expand on shift register 108.

The data stored in the line shift register 108 is applied as a voltage to the recording electrode in the image forming means 218 by the recording electrode driver 109.

Since the data transfer for one screen has been completed, the host connects COM/
Set DATA to LOW to prepare for output of the next screen.

FIG. 10 shows a flowchart for rearranging image data in this embodiment, and FIG. 11 shows an overall flowchart in this embodiment.

Next, we will illustrate the case where multiple types of this embodiment are used,
This will be explained using FIG.

FIG. 4 shows a method of controlling three types of image display devices as an example of a plurality of image display devices.

In FIG. 4 of the drawing, image data sent from a host controller 401 is sent to interfaces 402 and 40.
5,408 to the image display device (1) to 3). Image display devices (1) and (2)
), the image forming means 404, 407 are located below the display surface 217 of the recording medium, and the image display device (3) is located above the recording medium.

As in the case described above, such an image display device (3) cannot display a normal image unless the arrangement of image data on the display surface 217 of the board record is horizontally reversed and transmitted to the image forming means 410. do not have. For this purpose, the image data is rearranged.

That is, when the image data sent from the host 401 is first written to each of the memories 403, 406, and 409 in the image display device, each image is displayed in the reverse direction, vertically, horizontally, and vertically according to the method described above. The images are expanded in the page memories 403, 406, and 409 in the display order suitable for the device, and then output to the image forming means 404, 407, and 410.
It is then read out and transmitted line-by-line.

With this operation, data can be sent to the image display device side without worrying about the type of the image display device on the host controller 401 side.

[Effects of the Invention] As explained above, according to the present invention, by converting and displaying the arrangement of image data on the image display device side,
When the host sends data, there is no need to consider the development and recording of the image data, and the format of the image data sent to the image display device can be unified, making control easier.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an image display device according to an embodiment of the present invention, FIG. 2 is a timing chart showing the operation timing of this embodiment, and FIG. 3 is a diagram showing the state of image display according to this embodiment. FIG. 4 is a diagram showing operation control of multiple types of image display devices of the present invention, FIG. 5 is a side sectional view of a conventional image display device, and FIG. FIG. 7 is a diagram showing the state in which the image forming means is placed above the display section, FIG. 8 is a diagram showing the A and B sides when direct data is sent in the conventional example, FIG. 9 is a perspective view showing the display of surfaces A and B in FIG. 6, and FIG. 9(a) is a view when viewed from surface A,
10 is a flowchart of the reversal flow of the embodiment, and FIG. 11 is a flowchart of the entire flow of the embodiment. 101---Interface circuit 102---
...Serial-parallel conversion circuit 103------
Page memory 104---parallel-serial conversion circuit 105-
-----Controller 10B---1 line shift register 109---
. . . Recording electrode driver 111 --- Screen A 112 --- Screen B 218 --- Image forming means Note that the same reference numerals in the drawings indicate the same or corresponding parts. ATA 4 TA 1, usec o, D168o

Claims (2)

[Claims] (1) A belt-shaped recording medium, a conveying means for moving the recording medium in the longitudinal direction, an image forming means for depositing a colored substance on the recording medium to form an image according to the image information, and the image information an image information storage means for storing; a control means for controlling reading and writing of the image information storage means; and an arrangement for rearranging the arrangement of the image information to be displayed according to the moving direction of the recording medium and the positional relationship of the display surface. 1. An image display device comprising: a changing means; and an image display device. (2) The image display device according to claim 1, wherein the rearranging means is a means for arranging the image information to be displayed in any one of upside-down, upside-down, or up-down and left-right upside down.