JPH0274988A - Display device - Google Patents

Abstract

PURPOSE:To make the display contents easily visible and easily understandable by resetting a timer and executing a control so as to continue a display of the same image, when an observer is detected on the way of an image display, at the time of switching, and displaying successively a display image at a time interval which is determined in advance. CONSTITUTION:A floor switch 1 being a detecting means detects whether a person (observer) who is looking at a display screen (display board) exists or not, a display controller 2 being a display control means executes a screen control such as switching of the display screen, etc., and an IC memory 3 being a storage means stores in advance plural image data. In this state, at the time of switching and displaying successively a display image at a time interval which is determined in advance, when an observer is detected on the way of an image display, a timer 11 is reset and a control is executed so as to continue a display of the same image. In such a way, the display time is extended substantially, and when a person is looking at an image which is being displayed, even if a prescribed time comes, the display image remains unchanged, and the display contents becomes easily visible and easily understandable.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a display device capable of sequentially displaying a plurality of images that have been stored or recorded in advance, and particularly for display devices that can be used to guide various information, advertisements, etc. This is suitable for large-sized display devices used for.

[Prior Art] Conventionally, in this type of display device whose display target is an unspecified target such as a passerby, stored images are automatically switched and displayed at regular time intervals.

[Problem to be Solved by the Invention] However, in such conventional devices, the screen automatically switches to the next screen after a certain period of time has passed, so the person watching the display screen (hereinafter referred to as an observer) )
The display had the disadvantage that it disappeared even while viewing the screen, and the display effect of information, advertisements, etc. was not sufficient.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the above-mentioned drawbacks, and to prevent the displayed image from changing even if the specified screen switching time has elapsed while the person is looking at the screen when a person is detected in front of the display screen. The object of the present invention is to provide a display device with improved display effects.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a display device that sequentially switches and displays a plurality of images on a display screen at predetermined time intervals, and a clock means for measuring the time intervals. , a detection means for detecting the presence of a person in front of the display screen;
The present invention is characterized by comprising display control means for resetting the clock means and extending the display of the same image in response to the detection by the detection means.

[Function 1] With the above configuration, the present invention resets the timer to display the same image when an observer is detected in the middle of image display when displaying images are sequentially switched and displayed at predetermined time intervals. Since the display is controlled to continue, the display time is effectively extended, and when a person is looking at the displayed image, the displayed image does not change even after the specified time has elapsed, making it easier to see and understand the displayed content. become more susceptible to

[Embodiment J] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 shows a schematic circuit configuration of an embodiment of the present invention. In this figure, 1 is a detection means for detecting whether or not there is a person (observer) looking at a display screen (also called a display board). 2 is a display control device as a display control means that performs screen control such as switching the display screen, 3 is an IC memory as a storage means in which a plurality of image data is recorded in advance, and 4 is a large screen display. This is a large display device body that uses a suitable magnetic stylus development method.

The above-mentioned display control device 2 is composed of a CPU (central processing unit) 10 such as a one-chip microcomputer that controls overall arithmetic operations and a timer 11 that measures time.
The CPU 10 executes the display control according to the present invention according to the control procedure shown in FIG. 2, which is stored in advance in the internal memory ROM of the CPU 10.

Further, the timer 11 is appropriately set in advance for the time required to view one screen.

Next, the operation of the embodiment of the present invention will be described with reference to the flowcharts in FIGS. 2(^) and 2(B).

First, the timer 11 is reset and started (step St, step 52).Next, image data is read from the image memory 3 (step S3), and the read image data is transferred to the display device 4 to display the image. Display (step S4).

Thereafter, after a while, when the timer 11 has fully counted (step S5), the read start address of the memory 3 is updated (step S6), the flag variable "F" to be described later is reset to zero (step S7), and the above steps are repeated. Returning to S1, the same operation as described above is repeated.

However, when it is detected that the floor switch 1 has been pressed during the above operation (step S8), the value of the timer 11 is reset and restarted by interrupt processing (
Step 5IO), this interrupt processing allows the display time of the same screen (image) to be extended until the display image is finished reading. Here, the flag variable "F" is used to prevent the display time from being extended to the maximum, and when "1" is set to "1F" (step 511), the interrupt by the floor switch 1 is not allowed until the timer 11 has fully counted. No counter is added (step S9).

With these operations described above, even if you go to look at the display board of the display device 4 just before the specified time, the display will not be updated before you finish looking at it, and you will be able to fully understand the displayed content. be able to.

FIG. 3 shows an example of the internal configuration of the large display device 4 shown in FIG.
In this figure, 120 is a charged sheet for display, 110 is a roller for sheet feeding, and 111 is an electrode corresponding to a pixel in the main scanning direction. 150 is a magnetic stylus developing block, which includes, in addition to the electrode 111, a developing cylinder 140.
and toner 130.

The display control device 2 described above applies a voltage corresponding to one line of pixels to the electrode 111. This voltage charges the display sheet 120, and the toner 13 is placed in the charged position.
0 is attached and an image of the °C1 line is formed. At the same time, a roller 110 is used to separate the display sheet 1 for each line.
20 in the upward direction of arrow 17G in the figure, the entire image is formed.

Furthermore, after a certain period of time has passed, the rotation of the sheet 120 causes
What was previously displayed on display side A will be moved to back side B.
The newly input image is displayed on display surface A. In addition,
The image on the back side B is hidden from public view.

After that, the back side B is further rotated by the rotation of the sheet 120.
The image on top is erased by the static eliminating needle 112, and a new image is drawn at the erased position. Naturally, at this time, the image on the display surface A moves to the back surface B, repeating zero or more operations, and the display device continues to display the image.

Note that the above-described large display device 4 is not limited to the one using the magnetic stylus development method as described in this embodiment.
For example, those using fluid ink (Japanese Patent Application No. 62-19
8189), a CR7 type projector, and the like can be used. Further, the switch 1 is not limited to a floor switch as in this embodiment, but can also be used as an infrared sensor, for example. Furthermore, the memory 3 is not limited to an IC memory, but may also be a floppy disk or the like, or may be replaced by a document reader with an ADF that automatically reads microfilm or documents.

[Effects of the Invention] As explained above, according to the present invention, when sequentially switching and displaying display images at predetermined time intervals,
When an observer is detected during image display, the timer is reset and the same image continues to be displayed.
The display time is substantially extended, and when a person is looking at the image being displayed, the displayed image does not change even after a predetermined time has elapsed, resulting in the effect that the displayed content is easier to see and understand. Therefore, if the device of the present invention is used for guidance, advertising, etc., the display effect can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic circuit configuration of an embodiment of the present invention, FIGS. 2(A) and (B) are flowcharts showing the control operation procedure of the embodiment of the present invention in FIG. 1, and FIG. FIG. 2 is a perspective view showing an example of the internal configuration of the large-sized display device shown in FIG. 1; DESCRIPTION OF SYMBOLS 1... Switch (detection means), 2... Display control device (display control means), 3... Memory, 4... Large display device, 10... CPU. 11...Timer (timekeeping means). Figure 1

Claims (1)

[Scope of Claims] A display device that sequentially switches and displays a plurality of images on a display screen at predetermined time intervals, comprising: a timer that measures the time interval; and a timer that detects the presence of a person in front of the display screen. A display device comprising: a detection means; and a display control means for resetting the clock means and extending the display of the same image in response to the detection by the detection means.