JP2001305989A - Video display system and video display method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the direct entry of the rays to the human eyes passing an inlet and to effectively and effeciently provide the information desired to be transmitted. SOLUTION: A door 1 having transmissibility is provided with a transmissible screen 2 and the videos are projected by a projector 4 to this transmissible screen 2, to display the videos. The door 1 is provided with a sensor 6 for detecting the opening thereof and a control mechanism 8 controls the projector 4 so as to interrupt the video projection by the projector 4 when the sensor 6 detects the opening of the door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility such as a store or a public institution, which displays an image including information such as advertisements and guidance on a door of the facility to effectively transmit information to visitors and passers-by. The present invention relates to a video display system and a video display method for transmitting.

[0002]

2. Description of the Related Art As a conventional technique for displaying an image including information such as advertisements and guidance on a transparent (transparent) door installed at the entrance of a facility such as a store or a public institution, for example, Japanese Patent Laid-Open No. What is described in -43821 is known. This is a sensor that provides a translucent screen on a transparent glass door, projects an image on the screen with a liquid crystal video projector, displays the image on the screen, and detects a person approaching the door. In this case, the projection of the image is interrupted by the sensing signal to prevent the light of the projection from directly entering the eyes of the visitors and dazzling.

[0003]

However, according to the above-mentioned prior art, when a person approaches the entrance door, the projection is interrupted, and the user stands in front of the door and continues to look at information. Can not. If the entrance of the facility faces a street such as a sidewalk, the projection may be interrupted every time a pedestrian passes nearby.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing problems, and has as its object to prevent a projection light beam from directly entering the eyes of a person passing through an entrance and to transmit information to be transmitted. It is to provide it effectively and efficiently.

[0005]

In order to achieve the above object, according to the present invention, a sensor for detecting the opening and closing of a transparent door provided with a screen is provided, and an image is displayed on the screen in response to a detection signal from the sensor. Is configured to control a projection device that projects the image. That is, when the sensor detects that the door has been opened, the image projection of the projection device is interrupted, and thereafter, when the sensor detects that the door is closed, the image projection of the projection device is restarted. Things.

[0006] The restart of image projection when the door is closed may be performed after a predetermined time has passed since the door was closed. According to such a configuration, the display of the image is not interrupted just by a person passing by or standing near the door, so that the image can be sufficiently viewed while standing in front of the door, which is effective. Information can be transmitted efficiently. Further, since the projection of the image is interrupted by opening the door, it is possible to prevent the projection light beam from directly entering the human eye.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a cross-sectional view of a facility entrance provided with a video display system according to the present invention as viewed from the side.
A transparent screen 2 is provided inside the facility of a transparent, for example, glass door 1, and a projection device 4 including a lens unit 11 which is an image output port is mounted on a ceiling 3 by a fixing bracket 5. Fixed. The door 1 may be an automatic door, a manual door, or a sliding door. In the present embodiment, the projection device 4 uses a liquid crystal projector. Of course, a film projector or the like having a similar role can be used, and this may be used. The projection device 4 projects an image including information such as a notice or guidance on the transmission screen 2 provided on the door 1, and displays the image outside the facility through the transmission screen.

Further, a sensor 6 is provided in the vicinity where the door 1 and the wall surface 10 are in contact with each other. The sensor 6 has a function of detecting opening and closing of the door 1. The fixing fitting 5 is provided with a control mechanism 8 configured using, for example, a microcomputer, and the sensor 6 and the control mechanism 8 are connected by a detection signal cable 7. The control mechanism 8 and the projection device 4 are connected by a control signal cable 9.

FIG. 2 is a control block diagram of the video display system in the present embodiment. The sensor 6 includes a detection signal generation circuit 12, and detects the opening and closing of a door to generate a detection signal. The detection signal is input to the control mechanism 8. The control mechanism 8 includes a control signal generation circuit 13 and generates a control signal based on the detection signal output from the detection signal generation circuit. The control signal is input to the projection device 4. The projection device 4 includes a drive control circuit 14 and a video display circuit 15. The drive control circuit 14 performs drive control for interrupting or restarting projection, and the video display circuit 15 suspends or restarts projection. When the sensor 6 detects the opening of the door 1, the detection signal generation circuit 12 generates a detection signal (for example, an H level signal) indicating the opening of the door 1 and outputs it to the control mechanism 8.
The control signal generation circuit of the control mechanism 8 includes the detection signal generation circuit 1
A control signal for interrupting the image projection of the projection device 4 is generated based on the detection signal output from the control unit 2. In the present embodiment, the control signal for interrupting the video projection controls the drive control circuit 14, and the drive control circuit changes the video input signal to the video display circuit 15 to a black signal input to perform black display. Includes instructions to enter state. Thus, light is not substantially emitted from the projection device 4. That is, in the present embodiment, at least while the sensor 6 detects the opening of the door 1, the projection of the image by the projection device 4 is interrupted so that the image is not displayed.

On the other hand, when the door 1 is closed, the detection signal generation circuit 12 generates a detection signal (for example, an L-level signal) indicating that the door 1 is closed, and outputs the detection signal to the control mechanism 8. The control signal generation circuit 8 generates a control signal for restarting image projection of the projection device 4 based on the detection signal output from the detection signal generation circuit 12. In the present embodiment, the control signal for interrupting the video projection controls the drive control circuit 14, and the drive control circuit changes the video input signal to the video display circuit 15 into a normal signal input, thereby causing the black display. Contains instructions for canceling.
In the present embodiment, as a configuration for interrupting the image projection, the image input signal of the projection device 4 is set to the non-display state by inputting no image (black signal). The shutter may be closed in the optical path of the lens unit 11 in response to a control signal including a command to suspend video projection output from the control signal generation circuit 13 of the control mechanism 8.

[0011] The restart of the projection of the image when the door 1 is closed is anticipated at the time when the vibration of the door 1 stops or the time at which the person sufficiently leaves the door 1, and the door 1 is closed (that is, the door 1 is closed). The sensor 6 detects that it has been closed,
The detection may be performed after a predetermined time (for example, 1 to 2 seconds) has elapsed since the detection signal generation circuit 12 outputs the detection signal. In this case, a timer function of the microcomputer of the control mechanism 8 is used. For example, a control signal for interrupting the image projection is output after a preset time has elapsed in the timer of the microcomputer after the detection signal is input to the control mechanism 8. You may do so. Further, a delay circuit may be provided in the output stage of the sensor 6 or the input stage of the control mechanism 8, and the detection signal from the sensor 6 may be delayed by a predetermined time and input to the control mechanism 8.

FIG. 3 is a diagram showing an example of a sensor for detecting the opening and closing of the outward opening door. The sensor uses a magnet to open and close a switch, and is composed of a switch unit 16 and a magnet unit 17. When the door 1 with the screen 2 closes,
It is detected that the magnet unit 17 approaches the switch unit 16 and the door is closed. Of course, the door can be used not only in the case of opening outward but also in the case of opening inside. FIG. 4 shows an example of a sensor for detecting the opening / closing of a sliding door, which detects the opening / closing of the door as in the case of the outward opening door of FIG. This method can be applied to both manual and automatic doors.

As described above, according to the present embodiment, it is possible to provide effective information using a space of high interest such as a door at the entrance of a facility. Even in a facility that does not have a window glass or a show window suitable for installing a screen, the screen can be attached to the entrance glass door. The type of the entrance door is not limited, and the door can be widely used, such as an automatic door, an outside door, an inside door, and a sliding door. Further, when installing the projection device in the facility, the use of the entrance has an effect that the distance and space required for projection can be easily secured.

Further, since the projection from the projection device is interrupted when the door is opened, it is possible to prevent a light beam of the projection from directly entering the eyes of a person passing through the entrance and dazzling. Since the opening and closing of the door is detected by the sensor, it is possible to continue to see the information in front of the door, and there is no needless interruption of the image by people passing in front of the door, so the information to be conveyed is effectively and efficiently There is an effect that it can be provided.

Further, when the door is closed, the projection of the image is resumed after the elapse of a predetermined time, so that the image can be prevented from shaking due to the vibration of the door, and the image can be prevented from being interrupted by a person.

[0016]

According to the present invention, it is possible to effectively and efficiently transmit information while preventing a projection light beam from directly entering a human eye.

[Brief description of the drawings]

FIG. 1 is a diagram showing an embodiment of a video display system according to the present invention.

FIG. 2 is a control block diagram of the video display system according to the present invention.

FIG. 3 is a diagram showing an example of a sensor 6 provided on an outward opening door;

FIG. 4 shows an example of a sensor 6 provided on a sliding door.

[Description of Signs] 1 ... door, 2 ... transmissive screen, 4 ... projection device, 6 ...
Sensor, 8 ... control mechanism.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Masaki Sato 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Inside Digital Media System Division of Hitachi, Ltd. (72) Inventor Akinori Yuhara Yoshida, Totsuka-ku, Yokohama-shi, Kanagawa No. 292, Hitachi, Ltd. Digital Media Development Division, Hitachi, Ltd. (72) Inventor Makoto Matsuhashi 292, Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture F-term, Digital Media System Division, Hitachi, Ltd. 5C058 EA26 EA32 EA38 5G435 AA01 BB17 DD06 DD09 EE30 GG46 LL15

Claims (6)

[Claims] 1. A screen is provided on a door having transparency,
In an image display system configured to project and display an image on a screen by a projection device, a sensor for detecting opening and closing of the door, and an image performed by the projection unit in response to a detection signal from the sensor. And a control mechanism for controlling interruption or start of projection of the image. 2. The control device according to claim 1, wherein when the sensor outputs a detection signal indicating that the door has been opened, control is performed so as to interrupt projection of an image performed by the projection device. The video display system according to claim 1. 3. The control mechanism according to claim 1, wherein when the sensor outputs a detection signal indicating that the door is closed, control is performed so as to start projection of an image performed by the projection device. The video display system according to claim 1. 4. The control mechanism controls the projection device to start projecting an image after a predetermined time has passed since the sensor outputs a detection signal indicating that the door is closed. The video display system according to claim 1, wherein: 5. An image display system according to claim 1, wherein said door is a door at an entrance of a facility. 6. An image display method for projecting an image on a screen provided on a transparent door by a projection device and displaying the image on the screen, wherein opening and closing of the door is detected by a sensor. An image display method characterized by controlling interruption or start of image projection performed by the projection means in response to a detection signal from a sensor.