JPS61241194A - 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 [Technical Field of the Invention] The present invention relates to an improvement in the indicating means of a display device such as a blackboard that has a copying function. A display device, such as a blackboard, which has an instruction means for instructing an arbitrary display surface, and which can switch to a display surface designated by a new instruction while switching an arbitrary display surface according to an instruction from the instruction means. It is.

[Prior art]

Traditionally, letters were written on a blackboard at meetings, lectures, etc.

It is common for the audience to transcribe the shapes in their notes, but
Eliminate the hassle of such transcription.

A blackboard with a copying device has been proposed to prevent writing errors and to directly copy characters written on the blackboard. Such a blackboard has a display surface composed of a white panel that moves in one direction and copies nine characters and figures drawn on the display surface.

However, this type of blackboard with a copying device has only one display surface, and it is cumbersome to make copies by moving the panel on the display surface for each display surface. In order to eliminate this inconvenience, a blackboard with a copying device has been proposed that has a display surface into which a paper-like sheet can be rolled up.

C. Problems with the Prior Art] In the conventional display device as described above, that is, a blackboard with a copying device that allows sheets to be rolled up, the board sheet wound between the winding roller and the unwinding roller is sequentially exposed through the window of the frame. A predetermined number of display surfaces (hereinafter referred to as the number of pages) can be displayed, and the number of pages is designated by a board operation section provided in the display device. The instruction means consisting of the board operation section has a switch means for winding the board sheet around the winding and rewinding rollers, and a switch means for winding the board sheet around the rewinding roller, and each time the switch for the forwarding or rewinding direction is pressed. This is because the page is moved one page left or right.

When you want to emit light on multiple pages, you have to press the switch multiple times. Further, if the indicating means is provided with switch means corresponding to the number of pages of the board sheet, it is possible to avoid pressing the switch multiple times. However, 9 For example, now I
If the page is displayed on the display screen and the board sheet is moving to the 5th page by specifying the 5th page, even if the 3rd page also has the necessary information, it is not possible to press the 3rd page. Once designated, the page cannot be designated by pressing the switch for the next third page until movement to the designated page is completed, which is extremely inconvenient.

[Purpose of the invention]

The present invention provides a display device that eliminates the above-mentioned inconvenience, and an object of the present invention is to provide a display device that can specify a page regardless of whether the board sheet of a blackboard with a copying device is stopped or moving. .

[Key points of the invention]

In order to achieve the above object, the present invention includes: an instruction means capable of selecting a display surface to be displayed on a display window of a display means having a plurality of display surfaces; a driving means for switching the display surface;
It is equipped with a detection means for detecting the display surface displayed on the display window, and a controller means for comparing the display surface data according to the output direction of the detection means with the new display surface data according to the output of the instruction means made by the selection of the instruction means. The present invention is characterized in that, when a new instruction is given by the instruction means while the two display screens are being switched in response to an instruction from the instruction means, the display screen is switched in response to the new instruction.

〔Example〕

Hereinafter, two embodiments of the display device of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a concrete plan view of the instruction means which is the board operation section;
FIG. 2 is a fundamental system diagram of the display device of the present invention, and FIG. 3 is a plan view of the board sheet of the present invention.

FIG. 4 is a memory configuration diagram of the board controller of the present invention,
FIG. 5 is a flowchart of the display device of the present invention, and FIG. 6 (al,
(b) is an external view of two blackboards of the present invention, and FIG. 7 is a diagram of FIG. 6 (a).
), and FIG. 8 shows a schematic diagram of the optical system of the present invention, and FIG. 6(a), (
In b), ■ is a board section, and the display means consisting of a frame 1a and a board sheet 3 having a substantially rectangular display surface has a board operation section 4 for instructing the frame to page of the board.
The copying device 2 is movable in a direction perpendicular to the board sheet surface on a rail 5a provided on a copying machine stand 5 bridged between the legs supporting the display means. Then, the copying device is pulled out, the original is placed on the original glass 2a, and a normal copy is made.

In the state shown in FIG. 6(b), the copying device 2 is pushed in to copy characters, figures, etc. drawn on the board sheet 3, thereby forming a display device. The structure inside the frame of the display means is shown in No. 711, and the board sheet 3 is configured such that the display surface is exposed through a window 9 formed in the frame 1a.A back-up board 6 is arranged at the rear of the window 9. A take-up roller 7 and a rewind roller 8 are rotatably pivoted to both ends of the window 9 of 1a, and both ends of the board sheet 3 are fixed to both rollers 7.8 and wound in large numbers.

The board sheet 3 fixed to one end of the take-up roller is fixed to the rewind roller 8 via the feed rollers 8a, 8b, 8c, the front window 9 of the backup board 6, and the feed roller 8d, and is wound in one roll. Take roller 7
is rotated by a drive motor (not shown) or the like. 17 and 18 are detection means for detecting marks on the board sheet. A plan view and a schematic diagram of the optical system are shown in FIGS. 7 and 8,
Feed roller 3a.

The part of the board sheet 3 on which characters 1, figures, etc. are written, stretched between 8b, is irradiated with a halogen lamp 10, and the reflected light passes through an optical path 11 to the first mirror 12→second mirror 13- An image is formed on the photosensitive drum 16 of the copying device 2 through the board lens 14 and the optical path 15. A shutter (not shown) is disposed between the board lens 14 and the photosensitive drum 16, and during normal copying as shown in FIG. 6(a), the shutter is shielded and the exposure opening of the copying device 2 is closed. When copying from a blackboard as shown in FIG. 6(b), the shutter is structured to automatically open the exposure aperture. In the optical system described above, as shown in FIG. 8, the first mirror 12 is arranged at an angle of 45 degrees with respect to the optical path 11, and the reflected light from the first mirror is perpendicular to the three surfaces of the board sheet. The light that is reflected backward and incident on the second mirror 13 is reflected downward at 90 degrees and is transmitted through the exposure port of the copying device 2 by the board lens 14 to the photosensitive drum 16 in the copying device.
reach the top.

In FIG. 2, 18 (17) is the light emitting element 18a (1
Marks provided on the upper and lower side edges of the board sheet 3 as shown in FIG. 3 are detected by a detecting means such as a photo ink printer comprising a light receiving element 7a) and a light receiving element 18b (17b).

In addition, a first page detection mark 19 is provided on the upper edge of the board sheet 3 and detected by the detection means 17. Marks 20 are also provided on the lower edge opposite to the upper edge. 2 For example, page detection marks 20, 22, etc. are provided at regular intervals on the lower edge, which serve as page detection marks, along the length of the board sheet 3. Marks are added for the corresponding number of pages. Further, on the lower edge of the board sheet 3, timing marks 21a, 21b, . . . for timing with the copying device are provided at regular intervals after the page detection mark.

These are detected by the detection means 18 provided on the lower side.

An operating voltage of +■ is applied to the light emitting element 18a of the detecting means through the resistor R1, and an operating voltage +V is also applied to the light receiving element 18b and the C terminal of the board controller 23, and the output of the detecting means 18 is indicated by C of the board controller. given to the terminal. The other ends of the light emitting element 18a and the light receiving element 18b are grounded, and the board sheet 3 on which page 9 detection or timing marks are attached moves between the light emitting element 18a and the light receiving element 18b, and a change in reflected light is detected and applied to the C terminal. It will be done. Inside the board controller, the current position data of the board sheet 3 is obtained by counting the pulse signals applied to this C terminal. The output from the terminal indicated by L of the board controller 23 is provided on the board operation section 4, which is an instruction means, and is output from page display lamps 29a, 29b for each page as shown in FIG. 1.
It is added to 9d and 29e to make them light up or blink. The B terminal is supplied with an instruction signal from the page instruction switches 30a, 30b, . . . 30d, 30e of the board operating section 4 for each page.

31 of the board operation unit 4 is a power switch, 27 is a power lamp 928 is a copy alarm lamp, and 32 is a print switch. With the above configuration, the page instruction switches 30a to 30
When one of e is pressed, the board sheet 3 is wound up or rewound until the corresponding page appears in the window 9 of the display means. Page display lamp 2 corresponding to the page specified during that time
98 to 29e are in a blinking state. Also, 1 page display lamp 29
The page display lamp corresponding to the page currently displayed in window 9 among those a to 29e is lit continuously. Therefore, each time the board sheet 3 moves and the detection means 18 provided in the board section 1 detects a page detection mark 20, 22..., the page display lamp 2
The lighting of 9a to 29e changes.

The board controller 23 in FIG. 2 is a page instruction switch 30.
By comparing the signals from a to 30e with the position signal of the board sheet 3 obtained from the detection means I8, it is determined whether to move the board sheet 3 forward or backward, and the winding motor 25 or Controls the rewind motor 26. or.

Inside the board controller 23, as shown in FIG. 4, there is a B register 3 that registers information input to the C and B terminals.
4 and C register 35 and forward direction (FOR) flag 36
．． A data register 33 having a reverse direction (REV) flag 37 and the like is provided.

A method of controlling the board seat drive of the board controller 23 described above will be explained with reference to the flowchart shown in FIG. Fifth
In the figure, at the start 38, in step 1, it is monitored whether or not the page designation switches 30a to 30e, which specify the page of the board sheet 3 appearing on the window 9 of the display device, have been pressed. Return to starting position 38,
If it is pressed and “YES”, the board controller 23
moves the data specified by the page instruction switches 30a to 30e, that is, the data B applied to the B terminal, in step 2.
Get it at

On the other hand, a page detection pulse signal obtained by waveform-shaping the detection output obtained from the light receiving element 18b of the detection means 18 and made into a pulse signal is applied to the terminal C of the controller 23, and from this signal the current position data C of the board sheet 3 I am getting .

Then, in the board controller 23, data B and data C
Compare the size with (Step 4).

In step 4, if "YES", the reverse direction flag (R
It is confirmed whether the EV flag (EV flag) 37 is "1" (step 5). If "YES" here, the first rewind motor 26 is being driven and the board sheet 3 is moving in the feeding direction, so the first rewind motor 26 is stopped (Step 6), and the @ taking motor 25 is turned on ( Step 7).On the other hand, if step 5 is "No", the winding motor 25 is turned on (step 7), and the FOR flag is set.

Reset the REV flag.

On the other hand, in step 4, if signal B>signal C is not found, the process proceeds to step 9, where it is determined whether signal B<signal C. This case is also similar to step 4 above.

For example, it is performed by comparing the current position data C of the counter in the board controller 23 and the movement destination data B, and
ES", it is determined whether the FOR flag is set, and if the FOR flag is set, the take-up motor 25 is in operation, so the step is taken to stop the take-up remote motor 25 since it will move in the feeding direction. 11) Turn on the 1 rewind motor 26 (step 12). On the other hand, if the FOR flag is not set, the moving directions match, so turn on the rewind motor 26 and set the REV flag. The FOR flag is reset (step 13).

During this time, in step 4, it is monitored whether or not the page instruction switches 30a to 30e are pressed while the board sheet 3 is being moved.If any of the instruction switches 30a to 30e is operated, the process branches to step 4. Returning to , the destination data B and current position data C are obtained again, and data B and data C are compared as described above.

In this way, step 4. The determination is made in step 9, etc., and the flow is repeated until the condition B=C is reached.

Next, if the condition of B=C is reached, in step 15, RE
It is determined whether the V flag 37 is a cent or not.

If “YES”, go to steps 16 to 18, and “N” again.
o”, after processing steps 19 to 22 and step 23, board sheet 3 is processed in steps 16 to ■8.
performs the stopping operation.

This is the page detection mark 2 placed at the bottom of the board sheet 3.
0.22... is provided with a certain width for the purpose of preventing detection errors by the detection means 18, so when the board sheet 3 stops from the winding state and when it stops from the @returning state. There will be a difference in the stopping position depending on the case. In order to absorb the deviation of the stop position caused by the width of the detection mark, steps 15 to 23 are performed to always stop the rewinding state. That is, if the rewind state is detected in step 15 and the answer is YES, the detection means 18 detects the page detection mark and the rewind motor 26 starts to step when the current position data C changes from 2 to 1, for example. 17, all flags in data register 33 are reset as in step 18, and return 39 is performed. Of course, if the detection means 18 is not "on" in step 16, the process returns to step 14 and the above-described determination of B<C, B>C, etc. is repeated. On the other hand, if in step 15 the REV flag = ``No''.

This means that B=C when the winding motor 25 is winding up the board sheet 3, which violates the principle that positioning is always performed in the direction of rewinding movement, so the setting of the 20th FOR flag is confirmed (step 19). ), the 2nd take-up motor 25 is stopped (step 20), 1st step, 2nd step.
In step 1, the rewind motor 26 is turned on, and in step 22, the REV flag is set to 1 and the FOR flag is set to 0. By stopping the return motor 26, it is possible to suppress fluctuations in the stopping position due to variations in the width of the page detection marks.

Note that this stopping method may also be used to always stop from the 9-winding state.

Furthermore, since the current position data C of the board sheet 3 currently displayed on the window 9 of the display device 9 changes every time the detection means 18 detects the page detection mark 20, 22 of the board sheet 3, the board sheet 3 is moved. While the board sheet 3 is moving, only the last input page data is stored, so when the page instruction switches 30a to 30e are pressed while the board sheet 3 is moving, the current position data C and the destination instruction data B match. However, it is not possible to immediately stop the winding or rewinding motor. Even in such a case, it is possible to designate a page by pressing the page designation switches 30a to 30e while the board sheet 3 is moving by using steps 15 to 23 described above. That is.

It is determined that the current position data C and the movement destination instruction data B are B=C, and as in step 15, the REV flag is 1, and that the board sheet 3 is moving in the rewinding direction, and step 1
If the page detection means is "on" in 6, 9 rewind motor 2
6 “off”. If the board sheet 3 is moving in the winding direction as in the case where step 19 is "YES" (
FOR flag=1) Stop the take-up motor 25, turn on the rewind motor 26, and then stop it. Furthermore,
B=C and REV flag=not 1 (Step 1
5) And the FOR flag = 1 (if the 1st page detection means is "on", there is no need to move the board sheet 3, so the motor remains stopped and the page detection means is "on").
If not, the process returns to before step 21, the rewind motor 26 is turned on, and the process from step 22 to step 16 is performed. Therefore, even if the board sheet 3 is moved, it is possible to press the page designation switch and designate the destination of a new page.

〔Effect of the invention〕

The present invention is configured as described above, so that even if the page instruction switch for changing the destination is pressed while the board sheet is moving, the board sheet can be correctly stopped at the changed destination. With this, the board sheet can be moved to the target page in the shortest possible time, the amount of movement is reduced, and the life of the drive system can be extended.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the board operation panel of the display device of the present invention. FIG. 2 is a system diagram of the display device of the present invention. FIG. 3 is a plan view of a board sheet used in the display device of the present invention. FIG. 4 is a data register of the board controller of the display device of the present invention. FIG. 5 is a flowchart of the display device of the present invention. FIG. 6(a) is an external view of the display device of the present invention with the copying machine pulled out. FIG. 6(b) is an external view of the display device of the present invention with a copying machine inserted therein. FIG. 7 is a sectional view taken along the line AA' of FIG. 6 (al). FIG. 8 is a schematic diagram of the optical system of the display device of the present invention. 1... Board part. 1a. ...Frame. 2.. Copying device. 3.. Board sheet. 4.. Board operation section. 5.. Copying machine stand. 5a.. Rail. 6.. Backup board. 7.. - Winding roller. 8... Rewinding roller. 8a to 8e... Feed roller. 9. Second window. 10... Halogen lamp. 11.15... Optical path. 12.13... No. 1 and 2nd mirror. 14... Board lens. 16... Photosensitive drum. ■7.I8... Detection means. 20. 22... Page detection mark. 23... Board controller. 24... Motor drive circuit. 25... Winding motor. 26... Rewinding motor. 29a to 29e... Page indication lamp. 30a to 30e... Page indication switch. 33... Data register Patent applicant Casio Computer Co., Ltd. Same as above.
Casio Electronics Co., Ltd. Figure 1 Figure 2v! J Figure 3 Figure 4 Figure 6 (Q) (b) Figure 7 Figure 8

Claims (1)

[Claims] An instruction means capable of selecting a display surface to be displayed on a display window of a display means having a plurality of display surfaces, a driving means for switching and operating the display surface, and a detection means for detecting the display surface displayed on the display window. , controller means for comparing display surface data output from the detection means and new display surface data output from the instruction means made by the selection of the instruction means, and a display screen switching operation according to an instruction from the instruction means; A display device characterized in that when a new instruction is received by the instruction means in the display device, the display screen is switched in accordance with the new instruction.