JPS62136165A - Electronic blackboard - Google Patents

Abstract

PURPOSE:To automatically cut off the power supply to an electronic blackboard even when a power source switch is left turned on so as to economize the power consumption, by providing a photosensor which detects the illuminance of the location where the main body of the backboard is provided and cutting off the power supply when the illuminance detected by the photosensor declines to a level below a fixed value. CONSTITUTION:In an electronic blackboard power supply is required to various members, such as a winding shaft 3 driving motor, etc., and a power supply switch 13 is provided in a power source circuit 12. In addition, a photosensor 14 which detects the illuminance of the location where the main body 1 of this blackboard is provided is installed to the upper front section of the main body 1. Furthermore, a power supply turning-off circuit 16 which turns off the power supply to the blackboard by opening a relay contact 15 connected with the said power supply switch 13 is series when the illuminance detected by the photosensor 14 declines to a level which is lower than a fixed value (for example, 300 x) is provided.

Description

[Detailed description of the invention] Technical field The present invention relates to an electronic whiteboard.

BACKGROUND OF THE INVENTION In recent years, electronic blackboards have been developed in which image information such as characters and figures written on a blackboard surface can be read and output to a printer to obtain a hard copy. Such electronic blackboards are installed and used in conference rooms and the like.

However, when using this, due to the feeling of using a normal blackboard, the user may forget to turn off the power switch and leave the room after use, resulting in a waste of electricity.

Purpose The present invention was made in view of the above points, and an object of the present invention is to provide an electronic blackboard that can automatically turn off the power even if the user forgets to turn off the power switch, thereby saving power.

Configuration In order to achieve the above object, the present invention provides an electronic blackboard that reads and hard copies information written on the blackboard surface, and includes a light sensor that detects the illuminance of the installation location of the blackboard main body.
The device is characterized by being provided with a power OFF circuit that turns off the power when the illuminance detected by the optical sensor becomes less than a certain value.

Hereinafter, one embodiment of the present invention will be described based on the drawings. First, the appearance of the blackboard main body 1 is constructed as shown in FIG. More specifically, as shown in FIG.
6. Therefore, when the copy button is pressed using the operating section 7 provided on the entire surface of the blackboard main body 1, the white sheet 2 is wound and moved to the left by the winding shaft 3.

At this time, near the winding shaft 3, a lamp 8 facing the white sheet 2 sequentially exposes the sheet surface to slit light. Then, the reflected light from the sheet surface is sequentially imaged on an image sensor 10 such as a CCD via a lens 9, and image information is read. This will be output to a printer and made into a hard copy. 11 is a back plate that receives the white sheet 2.

In such an electronic blackboard, a power supply is required for various components such as a motor for driving the winding shaft 3, and a power supply circuit 1 is required.
2 is provided with a power switch 13. Further, an optical sensor 14 is provided at the upper front of the blackboard body 1 to detect the illuminance at the location where the blackboard body 1 is installed. Then, when the illuminance detected by this optical sensor 14 becomes less than a certain value (for example, 300 Q x), the power is turned off by opening the relay contact 15 connected in series to the power switch 13. Power OFF circuit 1
6 is provided.

According to such a configuration, even if a person forgets to turn off the power switch 13 and leaves the room after the end of a meeting or the like, the lighting equipment in the conference room or the like is generally turned off, so the illuminance decreases. At this time, as long as the power switch 13 is on, the optical sensor 14 always detects the illuminance at the installation location of the blackboard main body 1, and when a decrease in the illuminance is detected, the power is turned off.
By activating the circuit 16 and opening the relay contact 15, the power is automatically turned off. This makes it possible to save power.

Effects Since the present invention is configured as described above, even if you forget to turn off the power switch after use, the power will eventually be automatically turned off when the illuminance at the installation location drops below a certain value. This means that the power will be turned off, thereby saving power.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a block diagram, FIG. 2 is an external perspective view, and FIG. 3 is a plan view showing the basic configuration of an electronic blackboard. ■... Blackboard body, 14... Light sensor, 16...
Power OFF circuit 'ii:, il:'+'''I - Fig. 1

Claims (1)

[Claims] Electronic blackboards that read and hard copy information written on the blackboard are equipped with a light sensor that detects the illuminance at the location where the blackboard itself is installed, and when the illuminance detected by this light sensor falls below a certain value, the power is turned off. An electronic whiteboard characterized by being provided with a power OFF circuit for turning OFF.