JP2005062614A - Light source device, detecting/controlling device, control method and screen for the light source device, optical device and detection method for same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light source device, a control method and a screen for the light source device, an optical device and a detecting method for the optical device, constituted so that the optical device such as a telescope equipped with optical components having a light condensing function and the light source device equipped with a laser for a projector are prevented from being operated at the same time, then, the safety is enhanced. <P>SOLUTION: Regarding the light source device 1 equipped with at least the laser, when non-contact IC tags 21 and 22 arranged in the optical devices 11 and 12 equipped with at least the optical components having the light condensing function are detected, the light source device 1 is controlled so that the output of the laser light beams may be reduced or stopped. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a light source device, a detection control device, a control method for the light source device, a screen, an optical device, and a detection method for the purpose of safely using a light source device having a laser as a light source.

  In recent years, image projection devices for projecting image information such as video signals onto screens, so-called projectors, have become larger, and high-intensity lamps and laser light sources have been incorporated to make the screens larger and for viewing in bright places. It is.

  In a device using a laser, it is necessary to ensure safety during use because the laser beam may affect the human eye. For this reason, the method of use is stipulated in the international standard IEC-60825 by the laser output for the equipment using the laser.

  In a light source device such as a projector that scans and projects a laser beam modulated in accordance with a video signal or the like onto a screen, for example, in the international standard IEC-60825-3, an audience enters as a laser show guidance. Where you can. It is specified that the projection area is 3 m or more upward from the floor and 2.5 m or more in the horizontal direction.

  However, in reality, there are few theaters and venues such as projection rooms where the laser light can be charged and separated from the audience in this way, and projection outside the theater is also limited.

In order to comply with the guidance of the international standard IEC-60825-3 and to prevent the laser beam from irradiating the human body, the APR (Automatic Power Reduction; Various types of automatic output control have been proposed.
For example, as a safety device for a projection television receiver, the output of the light source is controlled based on the detection output from the detection means and the detection means for detecting the intrusion of the moving body from the projection optical system to the projection area on the screen, There has been proposed a television receiver characterized in that the light output is reduced or blocked (see, for example, Patent Document 1).

According to the above-mentioned international standard IEC-60825 for laser safety, optical devices such as telescopes, that is, optical components having a condensing function, are required as class 1 requirements (which are safe even if the laser is directly seen). It is stipulated that it is safe to look through the device.
Looking into a light source such as a laser projector with an optical device such as a telescope must be avoided because a wide range of light received by the lens may be focused on the eye and affect the eye. .

However, the laser output at a level that is safe even when viewed through a telescope or the like is extremely reduced to about 1/5 compared with a case where an optical device such as a telescope is not taken into consideration. It is difficult to obtain good images and images by projecting on the screen.
Japanese Laid-Open Patent Publication No. 4-111585 Japanese Unexamined Patent Publication No. 2002-183690 JP 2002-298106 A

  The present invention solves the above-mentioned problems and improves safety by making it impossible to simultaneously use an optical component including an optical component having a condensing function such as a telescope and a light source device such as a projector having a laser. A light source device, a control method thereof, a screen, an optical device, and a detection method thereof are proposed.

  In order to solve the above-described problem, a light source device according to the present invention detects a non-contact IC tag provided in an optical device that has at least a laser and includes an optical component having at least a light collecting function. Is configured to perform control to reduce or stop the laser light output of the light source device.

  Further, the detection control device according to the present invention has a function of detecting a non-contact IC tag provided in an optical device including at least an optical component having a light collecting function, and when detecting the non-contact IC tag, The light source device having a laser is controlled to reduce or stop the laser light output.

  Furthermore, the method of controlling the light source device according to the present invention reduces the laser light output of the light source device having a laser when a non-contact IC tag provided in the optical device including at least an optical component having a light collecting function is detected. It is set as the structure which performs control which makes or stops.

  Furthermore, the present invention provides a method for controlling a light source device as described above, wherein at least before the projection of laser light from the light source device, the presence or absence of a non-contact IC tag provided in the optical device is detected, and this non-contact IC tag is detected. If so, the laser light output of the light source device is controlled.

  The screen according to the present invention is a screen for projecting light from a light source device having at least a laser, and when a non-contact IC tag provided in an optical device including an optical component having at least a light collecting function is detected. Further, a detection control device that performs control to reduce or stop the laser light output of the light source device is provided.

Furthermore, the optical device according to the present invention includes at least an optical component having a light collecting function and a non-contact IC tag.
Furthermore, in the method for detecting an optical device according to the present invention, the optical device is detected by a non-contact IC tag provided in the optical device having at least an optical component having a condensing function.

  According to each of the above-described present inventions, since a non-contact IC tag is provided in an optical device having an optical component such as a lens having a condensing function, when this non-contact IC tag is detected, that is, for example, an optical device such as binoculars Is detected when the viewer enters the venue where the light source device such as a projector is used, and the laser light is reduced or stopped by controlling the laser light. It is possible to reliably avoid situations such as peeping.

The non-contact IC tag is an information transmission means capable of transmitting information in a non-contact manner with an external device using RFID (Radio Frequency Identification: automatic recognition using radio) technology. It is also called “wireless IC tag”, “non-contact IC label” or the like. There are transmission using an electromagnetic induction method and transmission using an electrostatic coupling method, and various structures have been proposed (see, for example, Patent Documents 2 and 3).
Such a non-contact IC tag can be treated in advance, for example, when the optical device is manufactured or sold.

  Further, in the present invention, by providing a detection control device having a function of detecting such a non-contact IC tag and performing control for reducing or stopping the laser light output of the light source device having a laser, for example, it is separated from the light source device. By disposing the detection control device at the position where it is placed, safety can be improved more reliably.

  In the light source device control method of the present invention, at least before the projection of the laser light from the light source device, the presence or absence of the non-contact IC tag provided in the optical device is detected, and the light source is detected when this non-contact IC tag is detected. By adopting a configuration that controls the laser light output of the device, it is possible to avoid erroneously operating the light source device before starting the detection control device and to reliably detect the non-contact IC tag during the operation time of the light source. , Can increase safety.

  In addition, by using the screen according to the present invention, it is possible to improve the safety of viewers in the venue where the laser light is projected.

  The international standard IEC-60825 is required to be safe within the foreseeable range, and according to the present invention, as described above, a light source device such as a projector and other optical devices cannot be used simultaneously. By doing so, it is possible to surely avoid the danger of peeping with an optical device such as a telescope, and it is possible to obtain safety in compliance with the international standard.

  According to the light source device and the detection control device according to the present invention, when the non-contact IC tag provided in the optical device is detected, the laser light source is controlled via the optical device by performing control to reduce or stop the laser light output. It is possible to improve safety by reliably avoiding peeping.

Moreover, according to the control method of the light source device according to the present invention, similarly, the safety can be further improved when the light source device is used.
Further, in the above-described method for controlling the light source device, by detecting the presence / absence of the non-contact IC tag before projecting the laser light, it is possible to ensure reliable safety during the period of projecting the laser light.

  Further, in the above-described light source device control method, by providing the detection control device in the venue where the light source device is disposed, the optical device possessed by the viewer in the venue can be reliably detected, and safety can be improved. .

  Furthermore, in the above-described light source device control method, the detection control device is provided on the screen that projects the laser light from the light source device, so that the safety of viewers in the hall can be improved.

  Further, according to the optical device and the detection method thereof according to the present invention, it is possible to reliably avoid bringing the optical device into a venue or the like where the light source device having laser light is used, and to carry the optical component when using the light source device. Safety of the person can be increased.

  Examples of the best mode for carrying out the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following examples, and various modifications are possible without departing from the configuration of the present invention. Needless to say, changes are possible.

[1] First Embodiment First, an example of a light source device and a detection control device according to the present invention will be described in detail with reference to the schematic configuration diagram of FIG.

  The light source device 1 such as a laser scan projector projects, for example, an image on a screen (not shown) by scanning, for example, RGB (red, blue, and green) laser light.

  Here, for example, when the light source device 1 is turned on, it is assumed that the mode is set to prohibit emission of projection light. Next, before emitting the projection light, the detection control means 2 causes the optical devices 11 and 12 having a condensing function such as a telescope to emit detection radio waves as indicated by a solid line s, and the non-contact IC tag 21. , 22 is checked.

  When the non-contact IC tags 21 and 22 provided in the optical devices 11 and 12 receive the radio wave signal for detection from the detection control unit 12, the non-contact IC tags 21 and 22 are supplied from the detection control unit 2 without power by the power generated by the antenna. In response to the radio wave, respond and send your own recognition signal. In FIG. 1, an arrow d schematically shows how this response signal is detected.

Based on the recognition number of the non-contact IC tag 13, the telescope detector 12 can identify a radio wave response signal having a telescope recognition number from among response signals from various non-contact IC tags.
Therefore, when this recognition signal is detected by the detection control means 2, it is determined that there is an optical device such as a telescope in the same room and the laser projection light is emitted, the safety is impaired, and the light source device 1 By performing control to reduce or stop the laser light output, it is possible to reliably avoid simultaneous use of the optical devices 11 and 12 and the light source device 1 and to ensure safety.

  The detection control device 2 may be disposed close to the light source device 1, and may be disposed at a position separated from the light source device 1, for example, as illustrated in FIG. 2. FIG. 2 shows a state in which a video signal or the like is projected from the light source device 1 such as a laser projector onto the projection area 31 of the screen 30, and is detected when, for example, one of the viewers uses the optical device 11. The optical device 11 can be reliably detected by the non-contact IC tag 21 by the control device 2.

  The detection control device 2 may be configured integrally with the light source device 1.

  Further, it is possible to perform control for prohibiting the projection light from being emitted when the optical device 11 or the like is detected. When the detection of the optical device 11 or the like continues, it is possible to perform control such as resuming projection after confirming that the optical device 11 or the like is carried out of the venue so that the prohibit mode cannot be canceled.

An example of the process flow of such a control method will be described with reference to the flowchart of FIG.
First, before starting the operation of the light source device 1, or at least before the laser light projection, the operation of the detection control device 2 is started, and the detection of the non-contact IC tag is started.

  When the detection control device 2 does not detect the non-contact IC tags 21 and 22, the detection control device 2 does not output a detection signal or outputs a non-detection signal. In this case, control for performing projection by the light source device 1 is performed. For example, control is performed to switch the light source device 1 to a mode in which projection light can be output, and the projection is performed after shifting to a normal projectable state.

  This function also operates in a normal use state, and during the projection, the detection is continued except for the end of the projection. That is, when a person with a telescope or the like enters the room during the screening, the detection control device 2 detects this and sends a detection control signal to the light source device 1 to reduce or stop the laser light output, etc. Control. As a result, when the optical device is detected even during the screening, the laser light output is reduced to a safe level even when viewed through the telescope, or it is completely stopped and the projection is disabled, i.e., the end of the projection. Transition.

  In this way, when the optical device is brought into the venue where the light source device is used, this is surely detected, and the control of the laser light output is reduced or stopped so that the viewer can place the optical device in the venue. For example, even when a child or the like accidentally takes it out and uses it, it is possible to reliably detect it and to avoid looking into the laser light source to ensure safety.

  As described above, the international standard IEC-60825 requires safety within a foreseeable range. According to the present invention, a light source device such as a projector and other optical devices cannot be used at the same time. Therefore, it is possible to reliably avoid the danger of peeping with an optical device such as a telescope, and to obtain safety in compliance with the international standard.

[2] Second Embodiment Next, by using the method for controlling a light source device according to the present invention, it has a function of detecting a non-contact IC tag at least near the entrance of a venue where the light source device is arranged. An example in the case of arranging the detection control device 2 for controlling the laser light output will be described with reference to FIG. In this example, IC tag sensors 2A and 2B connected to the detection control device 2 are provided on both sides of the entrance 32 of the projection venue. When the transmission / reception distance of the non-contact IC tag 21 is 1 m or less, the radio waves for recognition signals cannot be blown to a far distance, so that the optical device 11 such as a telescope can be detected when passing through the entrance 32. . The entrance 32 may also serve as the exit.

  The IC tag sensors 2A and 2B at the entrance 32 can be operated even when the light source device 1 such as a projector is not operating, and can be controlled to always check the entrance 32 during the screening. When the light source device 1 is activated, a signal from the detection control device 2 is taken in, and after confirming that the optical device 11 has not passed through the entrance 32 in the past, the mode shifts to a mode in which the projection light can be output. You can also.

  Further, when the optical device 11 or the like is detected, it is possible to confirm that there is no danger after removing the optical device 11 in the venue 33 and reset the detection signal of the detection control device 2. As described above, the detection control device 2 is reset and the detection signal is shifted to “non-detection”, and then the light source device 1 is shifted to a normal projectable mode, thereby further improving safety. .

  Thus, by providing the detection control device 2 at least near the entrance 31 of the venue 33 where the light source device 1 is used, it is possible to reliably prevent the optical device from being brought into the venue 33 and ensure safety. In addition, as described above, by detecting and controlling the carry-in history of the optical device 21 by the detection control device 2, it is possible to provide a light source device with further improved safety and its control method.

[3] Third Embodiment In this example, a configuration in which the detection control device 2 is provided on the screen 30 is shown. In FIG. 5, parts corresponding to those in FIG.
In this way, by providing the detection control device 2 on the screen 30, the operation of the detection control device 2 can be confirmed without fail when the screen 30 is used, and the optical device in the venue is reliably detected. Can be secured.

  As described above, according to the present invention, since it is possible to reliably avoid looking into the laser light source through the optical device, the light source device excellent in safety in compliance with the safety standard required in the international standard described above. Can be provided. Therefore, it becomes possible to increase the output of the laser beam in order to provide a better image in a projector or the like, and it is possible to project a good image and image with excellent visibility and a safer light source device. Can be provided.

It is a schematic block diagram of an example of the light source device by this invention. It is a schematic block diagram of an example of the light source device by this invention. It is a flowchart explaining an example of the control method of the light source device by this invention. It is a schematic block diagram of an example of the light source device by this invention. It is a schematic block diagram of an example of the screen by this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source device 2 Detection control apparatus 2A IC tag sensor 2B IC tag sensor 11 Optical apparatus 12 Optical apparatus 21 Non-contact IC tag 22 Non-contact IC tag 30 Screen 31 Projection area 32 Entrance 33 Venue

Claims (13)

A light source device having at least a laser,
When a non-contact IC tag provided in an optical device including at least an optical component having a light collecting function is detected, control for reducing or stopping the laser light output of the light source device is performed. Light source device. Having a function of detecting a non-contact IC tag provided in an optical device including an optical component having at least a light collecting function;
A detection control device that performs control to reduce or stop laser light output of a light source device having a laser when the non-contact IC tag is detected. When a non-contact IC tag provided in an optical device including at least an optical component having a condensing function is detected, control is performed to reduce or stop the laser light output of the light source device having a laser. Method of controlling the light source device. At least before the projection of the laser light from the light source device, the presence or absence of a non-contact IC tag provided in the optical device is detected, and when the non-contact IC tag is detected, the laser light output of the light source device is controlled. The method of controlling the light source device according to claim 3. 4. The method of controlling a light source device according to claim 3, wherein a detection control device that controls a laser light output of the light source device when the non-contact IC tag is detected is provided in a venue where the light source device is disposed. . 5. The method of controlling a light source device according to claim 4, wherein a detection control device that controls a laser light output of the light source device when the non-contact IC tag is detected is provided in a venue where the light source device is disposed. . 4. The light source device according to claim 3, wherein a detection control device for controlling the laser light output of the light source device when the non-contact IC tag is detected is provided at least near the entrance of the venue where the light source device is arranged. Control method. 5. The light source device according to claim 4, wherein a detection control device for controlling a laser light output of the light source device when the non-contact IC tag is detected is provided at least near an entrance of a venue where the light source device is disposed. Control method. 4. The light source device according to claim 3, wherein a detection control device that controls a laser light output of the light source device when the non-contact IC tag is detected is provided on a screen that projects light from the light source device. Control method. 5. The light source device according to claim 4, wherein a detection control device that controls a laser light output of the light source device when the non-contact IC tag is detected is provided on a screen that projects light from the light source device. Control method. A screen for projecting light from a light source device having at least a laser,
A detection control device is provided for performing control to reduce or stop the laser light output of the light source device when a non-contact IC tag provided in an optical device including at least an optical component having a light collecting function is detected. A screen characterized by comprising. An optical device comprising an optical component having at least a light collecting function and provided with a non-contact IC tag. A method for detecting an optical device, comprising: detecting the optical device with a non-contact IC tag provided in an optical device having at least an optical component having a light collecting function.

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