JP2009003422A - Projector and control method of projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To cope with a safety problem by exerting control such that high luminance light is not directly projected but low luminance safe light is projected, thereby drawing attention from a user. <P>SOLUTION: When the projector body is connected to external power, the projector receives a Power switch ON operation from the screen of a touch panel. When the Power switch ON operation is performed, a light source is turned on while control is exerted so that a projection unit may project light that has light intensity level at which even if light enters the user's eyes, they are safe. In addition, the projector displays warning to prohibit a person to enter the projection area and operation message onto the screen of the touch panel and projects them onto the screen from the projection unit. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projector and a projector control method.

  In recent years, projection projectors that project light emitted from a light source device onto a screen have been widely used. Here, when a high-intensity light is projected from the projector, a safety problem has been pointed out in which the user directly receives the light. In order to cope with this safety problem, a technique for preventing a user from directly receiving light projected from a projector has been proposed. For example, in the projector described in Patent Document 1 below, when there is a possibility that light projected from the projector may be irradiated to a human, this is detected instantaneously by a sensor to reduce the power of the light source device. Or the light source device is switched off. In the projector described in Patent Document 2 below, an image projected on a screen is captured during image projection, and an input image signal is compared with the captured image. As a result of this comparison, when it is determined that the user has entered, the glare is reduced by reducing the projection light.

Japanese National Patent Publication No. 11-501419 JP 2004-254145 A

  However, the conventional techniques proposed in Patent Documents 1 and 2 described above can cope with the case where the user enters the projection area during the image projection, but the user enters the projection area before the image projection. I have not been able to deal with it. For example, a situation is assumed in which the user is in a position to receive the projected light before the image is projected. At this time, if a power operation is performed by a third party's easy operation and light is projected, the user may directly receive high-luminance and dangerous projection light, which is a safety problem. Arise. Further, in the conventional technology, since a user who enters the projection area is detected by using, for example, a sensor or by capturing an image, the configuration of the projector is complicated, and the cost associated with the device is increased. There is a problem that becomes higher.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

  An operation unit that receives an operation from a user; a projection unit that projects light according to an image signal; and a light intensity control unit that controls a light intensity of light projected from the projection unit. The projector, wherein when receiving an operation from the user a plurality of times, the light intensity control unit controls the light intensity according to an order of receiving the operation from the user.

  According to the projector described above, when the operation unit receives a plurality of operations from the user, the light intensity of the light projected from the projection unit is controlled according to the order in which each operation is received. That is, the light intensity of light projected from the projection unit by each operation can be made variable for each operation. For this reason, rather than suddenly projecting high-intensity projection light from the projection unit, the light intensity is increased stepwise according to the order in which each operation is accepted, and control is performed from low-intensity to high-intensity light. be able to. Accordingly, when light is projected by an operation while the user is entering the projection area, the user is controlled to project low-brightness and safe light instead of suddenly projecting high-brightness light. Can be alerted and can address safety issues. In addition, unlike the prior art, it is not necessary to detect whether or not the user is in the projection area using a sensor or the like, so that the safety problem is addressed with a simple configuration and the cost associated with the apparatus. can do.

  The light intensity control unit performs control so that light having a first light intensity is projected from the projection unit when a first operation is received from the user, and the second operation is performed following the first operation. A projector that controls so that light having a second light intensity greater than the first light intensity is projected from the projection unit when an operation is received.

  According to the projector described above, the first light intensity is projected from the projection unit when the first operation is received from the user, and the light having the second light intensity is projected from the projection unit when the second operation is subsequently received. It is controlled by the light intensity controller. At this time, since the second light intensity is larger than the first light intensity, first, the low brightness and safe projection light is projected by the first operation, and then the normal high brightness is projected by the second operation. It can control so that a projection light is projected. As a result, when light is projected by the first operation in a state where the user receives the projected light, low-luminance light that is safe for the user is projected, which is dangerous for the user. It is possible to cope with the safety problem of receiving a certain amount of projected light.

  The projector according to claim 1, wherein the first operation and the second operation are operations for instructing to project light from the projection unit.

  According to the projector described above, the operation for instructing the projection can be performed twice in the first operation and the second operation. Therefore, unlike the conventional technique, high-intensity light is not projected suddenly by an operation instructing one projection, but low-luminance and safe light is projected by an operation instructing the first projection. In the operation for instructing the second projection, normal high-intensity projection light can be projected as an image. As a result, it is possible to cope with a safety problem in which the user receives dangerous projection light.

  The projector is characterized in that the operation unit receives the second operation after a predetermined time has elapsed since the reception of the first operation.

  According to the projector described above, the second operation is accepted after a predetermined time has elapsed since the first operation was accepted. Thereby, it can be prevented that the user performs the second operation continuously without sufficiently confirming safety after the first operation, and receives the projection light with danger.

  The projector according to claim 1, wherein the predetermined time is approximately 5 seconds or more.

  According to the projector described above, the second operation is accepted after approximately 5 seconds or more have elapsed since the first operation was accepted. Thereby, time for a user to confirm safety | security enough after 1st operation can be ensured.

  A notification unit that outputs notification information to be notified to a user is further provided, and when the light with the first light intensity is projected from the projection unit, the notification unit is configured to detect light projected from the projection unit. A projector characterized by outputting notification information including information for prompting attention.

  According to the projector described above, when the light having the first light intensity is projected from the projection unit, the notification unit outputs notification information including information that calls attention to the projected light. From this, when low-luminance and safe projection light is projected, information that prompts the user to pay attention to the projection light can be shown. As a result, it is possible to cope with a safety problem in which the user receives dangerous projection light.

  The said notification part projects the light of the said 1st light intensity containing the said notification information from the said projection part, The projector characterized by the above-mentioned.

  According to the projector described above, it is possible to project and display information that calls attention to the projection light, and the user can read and confirm the projected content.

  The projector further comprising a display unit for displaying information to a user, wherein the notification unit causes the display unit to display the notification information.

  According to the projector described above, information for calling attention to the projection light can be displayed on the display unit provided in the projector, and the user can read and confirm the displayed content.

  The projector according to claim 2, wherein the operation of the operation unit in the second operation is different every time the second operation is received.

  According to the projector described above, the user performs different operations each time the second operation is performed. As a result, the user does not confirm the safety sufficiently after the first operation, and easily performs the second operation by the stored operation, and receives a dangerous projection light in the eyes. Can be prevented.

  A projector characterized in that at least the first light intensity of the first light intensity and the second light intensity can be set by a user.

  According to the projector described above, since at least the first light intensity can be set by the user, the first light intensity that should be low-brightness and safe projection light for the user can be freely set according to the use environment of the projector and the like. Can be set to

  The projection unit includes a light source unit that emits light, and the light intensity control unit controls the light intensity of light projected from the projection unit by adjusting the amount of light emitted from the light source unit. A projector characterized by that.

  According to the projector described above, the light intensity of the light projected from the projection unit is controlled by adjusting the amount of light emitted from the light source unit. Thereby, by controlling the electric energy supplied to the light source device, it is possible to easily control the light emitted from the light source unit to have a desired light amount.

  The light emitted from the light source unit is laser light.

  According to the projector described above, since the laser light is emitted from the light source unit, it is possible to project high-quality light with high luminance and excellent color reproducibility from the projector. In addition, since the amount of laser light emitted from the light source unit is stabilized in a short time, the projector can project low-luminance and safe projection light immediately after receiving the first operation.

  A projector that performs a process of verifying the stability of the amount of light emitted from the light source unit after the light having the first light intensity is projected from the projection unit.

  According to the projector described above, after the light having the first light intensity is projected, the process of verifying the stability of the light amount emitted from the light source unit is performed. As a result, the projector can perform a process of verifying the stability of the amount of light in a predetermined time from when the first operation is received until the second operation is received, and the user can stabilize the light amount. Can reduce the waiting time.

  An operation step for receiving an operation from a user; a projection step for projecting light according to an image signal; and a light intensity control step for controlling the light intensity of light projected in the projection step. When the operation from the user is received a plurality of times, in the light intensity control step, the light intensity is controlled in accordance with the order of reception of the operation from the user.

  According to the projector control method described above, when a plurality of operations are received from the user in the operation process, the light intensity of the light projected in the projection process is controlled according to the order in which each operation is received. That is, the light intensity of light projected in the projection process by each operation can be varied for each operation. For this reason, instead of suddenly projecting high-intensity projection light in the projection process, the light intensity is increased stepwise in accordance with the order of acceptance of each operation, and control is performed from low-intensity to high-intensity light. be able to. Accordingly, when light is projected by an operation while the user is entering the projection area, the user is controlled to project low-brightness and safe light instead of suddenly projecting high-brightness light. Can be alerted and can address safety issues. In addition, unlike the prior art, it is not necessary to detect whether or not the user is in the projection area using a sensor or the like, so that the safety problem is addressed with a simple configuration and the cost associated with the apparatus. can do.

(First embodiment)
Hereinafter, the projector according to the first embodiment will be described with reference to the drawings.

<Schematic configuration of projector>
First, a schematic configuration of the projector according to the first embodiment will be described.
FIG. 1 is a block diagram showing a schematic configuration of the projector according to the first embodiment. As shown in the figure, the projector 1 includes a projector body 10 and a remote control device 11. Further, in the projector main body 10, a power supply circuit 20, a display unit 31, a remote control circuit 32, an IF (abbreviation of interface) control circuit 33, a video input circuit 34 and a main circuit 40, and a projection unit 50 are used as projection liquid crystals. A drive circuit 51, a light source device drive circuit 52, a light source unit 53, a liquid crystal panel 54 for each color light, and a projection lens 55 are provided.

  The power supply circuit 20 includes a detection circuit 22 and a switch circuit 23. The power supply circuit 20 has a power supply terminal, and a power cable 21 is connected to the power supply terminal. By inserting a power plug at one end of the power cable 21 into, for example, an outlet, the projector body 10 is connected to external power via the power cable 21. When the projector main body 10 is connected to external power, the detection circuit 22 detects the power connection and outputs a detection signal to the switch circuit 23. Then, power is supplied to the projector body 10 by closing the switch circuit 23.

The display unit 31 is provided with a touch panel 31p as an operation unit. When the user operates the touch panel 31p (presses a specific part), the touch panel 31p outputs an operation signal corresponding to the operated position to the IF control circuit 33.
The remote control device 11 is used when the projector body 10 is remotely operated. When the user operates the remote control device 11, the remote control device 11 transmits an operation signal to the projector main body 10. The remote control circuit 32 of the projector body 10 receives the operation signal from the remote control device 11 and outputs it to the IF control circuit 33.

The IF control circuit 33 outputs operation signals from the touch panel 31p and the remote control circuit 32 to the main circuit 40. Further, the IF control circuit 33 performs control such as outputting a corresponding display image to the display unit 31 and control of the remote control circuit 32 in accordance with a signal from the main circuit 40.
The video input circuit 34 is connected to a personal computer (PC), a DVD (Digital Versatile Disc) playback device, or the like, and receives an image signal. The video input circuit 34 outputs the input image signal to the main circuit 40.

  The main circuit 40 includes a CPU 41 that performs image processing, signal processing, and the like, a memory 42 that includes a ROM (Read Only Memory) that stores a program, a notification unit 43, a light intensity control unit 44, and the like. The main circuit 40 controls operations of the IF control circuit 33, the video input circuit 34, the projection liquid crystal drive circuit 51, the light source device drive circuit 52, and the like based on the input signal. The main circuit 40 also outputs the image signal input from the video input circuit 34 to the projection liquid crystal drive circuit 51. The notification unit 43 displays a message serving as notification information to be notified to the user on the display unit 31 via the IF control circuit 33 or projects the message from the projection unit 50 onto the screen 60. The light intensity control unit 44 controls the light intensity of the light projected from the projection unit 50.

  The projection liquid crystal drive circuit 51 outputs a drive signal for each color light to the liquid crystal panel 54 for each color light based on the image signal input from the main circuit 40 to drive each liquid crystal panel 54. Each color light controlled in each liquid crystal panel 54 is combined by a dichroic prism (not shown), then enlarged by a projection lens 55 and projected onto a screen 60.

The light source device drive circuit 52 is a power supply circuit for supplying drive power to the light source unit 53, transforms the power supplied from the power supply circuit 20, and supplies it to the light source unit 53. The light source unit 53 is a laser light source device that emits laser light using, for example, a semiconductor laser or a solid-state laser as a light source.
Here, the light intensity control unit 44 adjusts the amount of laser light emitted from the light source unit 53 by controlling the power supplied from the light source device driving circuit 52 to the light source unit 53. Thereby, the light intensity of the light projected from the projection unit 50 is controlled.

<Projector operation>
Next, the operation of the projector 1 according to the first embodiment will be described.
FIG. 2 is a flowchart showing the operation of the projector according to the first embodiment. The flowchart shown in the figure shows the operation from when the projector body 10 is connected to external power via the power cable 21 until an image is projected on the screen 60.

  First, in step S110, when the projector main body 10 is connected to external power, the power supply circuit 20 detects power connection in the detection circuit 22 and closes the switch circuit 23 to supply power to the projector main body 10. .

In step S120, the main circuit 40 causes the notification unit 43 to display on the screen of the touch panel 31p of the display unit 31 an operation message for accepting the operation of the power switch as shown in FIG. For this purpose, the notification unit 43 of the main circuit 40 outputs a signal for displaying an operation message to the IF control circuit 33. Then, the IF control circuit 33 displays an operation message on the screen of the touch panel 31p based on the signal.
Here, as shown in FIG. 3, the screen of the touch panel 31p includes a system display unit 31a and a message display unit 31b. The system display unit 31a displays switches that can be operated by the user. A message to be notified to the user is displayed on the message display unit 31b.

  In step S130, the main circuit 40 determines whether the operation of the power switch is performed as the first operation from the screen of the touch panel 31p. Here, the operation of turning on the power switch is performed by pressing the “Power” portion displayed on the screen of the touch panel 31p shown in FIG. 3 by the user. If the power switch is turned on, the process proceeds to the next step S140. On the other hand, when the operation of the power switch is not performed, the process waits until the operation of the power switch is performed.

  In step S <b> 140, the main circuit 40 adjusts the light amount of the laser light emitted from the light source unit 53 to be smaller than normal under the control of the light intensity control unit 44, and turns on the light source unit 53. Here, the light intensity control unit 44 controls the amount of laser light so that the light projected from the projection unit 50 is at a safe light intensity level (first light intensity) even if the user directly receives the light. .

  In step S150, the main circuit 40 accepts a warning that a person enters the projection area and an operation of the Enter switch ON as shown in FIG. 4A, for example, on the screen of the touch panel 31p by the notification unit 43. Display the operation message. These warnings and operation messages are displayed on the screen of the touch panel 31p, and warnings and operation messages as shown in FIG. 4B are projected from the projection unit 50 onto the screen 60, for example. For this purpose, the notification unit 43 of the main circuit 40 outputs a signal for displaying a warning and an operation message on the screen of the touch panel 31p to the IF control circuit 33. Then, the IF control circuit 33 displays a warning and an operation message on the screen of the touch panel 31p based on the signal. In addition, a signal for projecting a warning and an operation message on the screen 60 is output to the projection liquid crystal drive circuit 51. The projection liquid crystal drive circuit 51 projects a warning and an operation message on the screen 60 based on the signal. Here, the warning displayed / projected on the screen of the touch panel 31p and the screen 60 is information that calls attention to the light projected from the projection unit 50.

  In step S <b> 160, the main circuit 40 performs processing for verifying the stability of the amount of light emitted from the light source unit 53 under the control of the projection liquid crystal drive circuit 51. The verification here is performed by determining whether or not the laser light is normally emitted from the light source unit 53 and there is no light leakage in the optical path.

  In step S170, the main circuit 40 determines whether or not a predetermined time has elapsed since the light source unit 53 was turned on in step S140. If the predetermined time has elapsed, the process proceeds to the next step S180. On the other hand, if the predetermined time has not elapsed, the system waits until the predetermined time elapses. In the present embodiment, a time of approximately 5 seconds or more is set as the predetermined time.

  In step S180, the main circuit 40 determines whether the Enter switch ON operation has been performed as the second operation from the screen of the touch panel 31p. Here, the operation of turning on the Enter switch is performed by the user pressing the “Enter” portion displayed on the screen shown in FIG. When the Enter switch ON operation is performed, the process proceeds to the next step S190. On the other hand, when the Enter switch ON operation is not performed, the process waits until the Enter switch ON operation is performed. Here, when the power switch is turned on from the screen shown in FIG. 4A, the light source unit 53 is turned off.

  In step S <b> 190, the main circuit 40 adjusts the laser light emitted from the light source unit 53 so that the light amount emitted from the light source unit 53 becomes a normal light amount from the small light amount so far, and turns on the light source unit 53. Then, the light intensity of the light projected from the projection unit 50 changes from a light intensity level (first light intensity) that is safe to the eyes so far to a normal light intensity level (second light intensity). It will be.

  In step S <b> 200, the main circuit 40 projects an image corresponding to the image signal input to the video input circuit 34 from the projection unit 50 onto the screen 60.

  In addition, the operation process of this invention is corresponded to said step S130 and step S180. Moreover, the projection process of this invention is corresponded to said step S200. Further, the light intensity control process of the present invention corresponds to the process of adjusting the light amount of the laser light emitted from the light source unit 53 in Step S140 and Step S190.

<Effect>
As described above, in the projector according to the present embodiment, after the projector body 10 is connected to the external power, the operation of the power switch ON is accepted from the screen of the touch panel 31p. When the power switch is turned on, control is performed so that light having a light intensity level that is safe even if it is directly received by the user is projected from the projection unit 50, and the light source unit 53 is turned on. Then, a warning that a person enters the projection area and an operation message are displayed on the screen of the touch panel 31p and projected from the projection unit 50 onto the screen 60. In other words, after connecting to external power, the first operation of the power switch is turned on, and instead of projecting high-intensity light at normal light intensity, low-intensity light that is safe for the user. Project.
As a result, when the user is in a position to receive the projection light and the power switch is turned on and the user receives the projection light, the user suddenly has a high-intensity light with danger. You will receive safe low-intensity light. At that time, a warning that a person enters the projection area is displayed on the screen of the touch panel 31p and projected onto the screen 60, so that the user can be alerted to the projection light. Accordingly, it is possible to cope with a safety problem in which a user receives a dangerous projection light.

Further, after a predetermined time has elapsed since the light source unit 53 was first turned on, an operation of turning on the Enter switch is accepted from the screen of the touch panel 31p. When the Enter switch is turned on, control is performed so that light having a normal light intensity level is projected from the projection unit 50, and the light source unit 53 is turned on. Then, an image corresponding to the input image signal is projected from the projection unit 50 onto the screen 60. That is, in the first operation, low-luminance light that is safe for the user is projected, and after a predetermined time has elapsed, a normal high-luminance image is projected on the screen 60 by the second operation.
Accordingly, it is possible to prevent the user from performing a second operation continuously without first confirming sufficient safety after the first operation, and receiving a dangerous projection light. In addition, since the process of verifying the stability of the amount of light emitted from the light source unit 53 is performed after the light source unit 53 is first turned on and before a predetermined time elapses, until the user stabilizes the light amount. You can reduce the waiting time. In the present embodiment, by setting the predetermined time to about 5 seconds or more, a time for allowing the user to sufficiently check the safety by reading the warning text is secured. In addition, the process for verifying the stability of the light quantity is completed within this time.

(Second Embodiment)
Hereinafter, a projector according to a second embodiment will be described with reference to the drawings.

  The schematic configuration of the projector according to the second embodiment is the same as the schematic configuration of the projector according to the first embodiment shown in FIG. The operation of the projector according to the second embodiment is the same as that of the flowchart according to the first embodiment shown in FIG. 2, but the process of displaying and projecting the warning and operation message in step S150 and the Enter switch in step S180. The process of accepting is different.

  In step S150 of the second embodiment, unlike the case of the first embodiment, for example, a warning and an operation message as shown in FIG. 5A are displayed on the screen of the touch panel 31p, and for example, as shown in FIG. As shown, a warning and an operation message are projected from the projection unit 50 onto the screen 60. As shown in FIG. 5A, a “Power” switch and four types of Enter switches “Enter1” to “Enter4” are displayed on the system display unit 31a of the screen of the touch panel 31p. Then, as shown in FIGS. 5A and 5B, the message display unit 31 b on the screen of the touch panel 31 p and the operation message SW on the screen 60 are displayed and projected to accept the “Enter 1” switch. Yes.

  Here, in step S150, the contents of the operation message displayed / projected on the message display unit 31b and the screen 60 are different each time step S150 is operated. That is, the warning and the operation message are different each time they are displayed / projected on the screen of the touch panel 31p and the screen 60. Specifically, the types of Enter switches included in the operation message are different. For example, at the location of the operation message SW as shown in FIGS. 6A and 6B, an indication to accept the “Enter 3” switch is displayed / projected. The order of the types of Enter switches to be displayed / projected is not particularly limited. For example, “Enter 1”, “Enter 2”, “Enter 3”, “Enter 4” may be displayed and projected in this order, or “Enter 1,” “Enter 4,” “Enter 2,” “Enter 3” may be arbitrarily displayed and projected.

  In step S180 of the second embodiment, the main circuit 40 determines whether the Enter switch ON operation has been performed from the screen of the touch panel 31p for the type of Enter switch displayed in the operation message in Step S150. That is, the type of Enter switch accepted here is different each time step S180 is operated. In the example of the screen of the touch panel 31p shown in FIG. 5A, the determination is made based on whether or not the “Enter 1” switch is pressed. In the example of the screen of the touch panel 31p shown in FIG. 6A, the “Enter 3” switch is pressed. Judgment is made depending on whether or not

<Effect>
As described above, in the projector according to the present embodiment, the Enter switch included in the operation message to be displayed / projected on the screen of the touch panel 31p and the screen 60 is set to a different type of Enter switch each time it is displayed / projected. When the displayed / projected Enter switch is pressed from the screen of the touch panel 31p, a normal high-brightness image is projected onto the screen 60. The user needs to check the content of the operation message every time in order to project a normal high-brightness image on the screen 60. As a result, after warnings and operation messages are displayed / projected on the screen of the touch panel 31p and the screen 60, the user continuously presses the Enter switch without sufficiently confirming safety, and receives dangerous projection light. Can be prevented.

(Modification 1)
In the above-described embodiment, after the projector body 10 is connected to the external power, the operation of the power switch ON is accepted from the screen of the touch panel 31p. However, the present invention is not limited to this, and after the image is projected on the screen 60, the power switch ON operation is performed by the user to turn off the light source unit 53. Thereafter, the power switch ON operation is performed again from the screen of the touch panel 31p. It also applies to accepting. Further, before accepting an operation of turning on the power switch from the screen of the touch panel 31p, for example, another operation such as accepting an operation of inputting a password may intervene.

(Modification 2)
In the above-described embodiment, warnings and operation messages are displayed on the screen of the touch panel 31p, and user operations are accepted from the screen of the touch panel 31p. However, the present invention is not limited to the touch panel 31p. For example, a warning and an operation message may be displayed on a display panel provided in the projector main body 10, and a user operation may be received from an operation button. Further, a warning and an operation message may be displayed on the remote control device, or a user operation may be received from the remote control device. In the above-described embodiment, the operation of the power switch ON and the enter switch ON is accepted. However, the type of the switch is not limited to this, and any switch or the like can be applied.

(Modification 3)
In the above-described embodiment, warnings and operation messages are displayed / projected on the screen of the touch panel 31p and the screen 60. At this time, in order to call attention, for example, the projection light on the screen 60 may be blinked. In addition to these displays and projections, for example, a buzzer sound or sound may be output to call attention.

(Modification 4)
In the above-described embodiment, the amount of laser light emitted from the light source unit 53 is adjusted by controlling the power supplied to the light source unit 53, and the light intensity of the light projected from the projection unit 50 is controlled. Yes. However, the present invention is not limited to this. For example, the light intensity is adjusted by providing a filter, a diaphragm, or the like on the optical path from the projection unit 50 until light is projected, or by processing image data to be projected. May be adjusted. Further, the light intensity of the projected light may be freely set by the user.

(Modification 5)
In the above-described embodiment, a laser light source device that emits laser light is used as the light source unit 53. However, the present invention is not limited to this, and for example, a discharge lamp such as a halogen lamp, a metal halide lamp, and a high-pressure mercury lamp may be used.

(Modification 6)
In the embodiment described above, a warning and an operation message as shown in FIG. 4A are displayed on the screen of the touch panel 31p, and a warning and an operation message as shown in FIG. . However, a message prompting the user to view the screen 60 may be displayed on the screen of the touch panel 31p, and a warning and an operation message as shown in FIG. In this case, the user who is viewing the screen of the touch panel 31p can surely check the screen 60.

1 is a block diagram showing a schematic configuration of a projector according to a first embodiment. 6 is a flowchart showing the operation of the projector according to the first embodiment. The figure which shows the example of a display of the screen of a touchscreen. The figure which shows the example of a screen of a touchscreen, and a screen. The figure which shows the example of a screen of the touchscreen which concerns on 2nd Embodiment, and a screen. The figure which shows the example of a screen of the touchscreen which concerns on 2nd Embodiment, and a screen.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 10 ... Projector main body, 11 ... Remote control device, 20 ... Power supply circuit, 21 ... Power supply cable, 22 ... Detection circuit, 23 ... Switch circuit, 31 ... Display part, 31a ... System display part, 31b ... Message display part , 31p ... touch panel, 32 ... remote control circuit, 33 ... IF control circuit, 34 ... video input circuit, 40 ... main circuit, 41 ... CPU, 42 ... memory, 43 ... notification unit, 44 ... light intensity control unit, 50 ... Projection unit 51... Projection liquid crystal drive circuit 52. Light source device drive circuit 53. Light source unit 54 54 Liquid crystal panel 55 Projection lens 60 Screen

Claims (14)

An operation unit for receiving an operation from the user;
A projection unit that projects light according to the image signal;
A light intensity control unit that controls the light intensity of light projected from the projection unit,
When the operation unit receives an operation from the user a plurality of times, the light intensity control unit controls the light intensity according to an operation reception order from the user.   The light intensity control unit performs control so that light having a first light intensity is projected from the projection unit when a first operation is received from the user, and the second operation is performed following the first operation. The projector according to claim 1, wherein when the operation is received, control is performed so that light having a second light intensity greater than the first light intensity is projected from the projection unit.   The projector according to claim 2, wherein the first operation and the second operation are operations for instructing light to be projected from the projection unit.   4. The projector according to claim 2, wherein the operation unit receives the second operation after a predetermined time has elapsed after receiving the first operation. 5.   The projector according to claim 4, wherein the predetermined time is approximately 5 seconds or more. It further includes a notification unit that outputs notification information to be notified to the user,
When light of the first light intensity is projected from the projection unit,
The projector according to claim 2, wherein the notification unit outputs notification information including information that calls attention to light projected from the projection unit.   The projector according to claim 6, wherein the notification unit causes the projection unit to project light having the first light intensity including the notification information. A display unit for displaying information to the user;
The projector according to claim 6 or 7, wherein the notification unit displays the notification information on the display unit.   9. The projector according to claim 2, wherein an operation of the operation unit in the second operation is different every time the second operation is received.   10. The projector according to claim 2, wherein at least the first light intensity of the first light intensity and the second light intensity can be set by a user. 11. . The projection unit includes a light source unit that emits light,
The said light intensity control part controls the light intensity of the light projected from the said projection part by adjusting the light quantity of the light inject | emitted from the said light source part, The any one of Claim 1 to 10 characterized by the above-mentioned. The projector according to item.   The projector according to claim 11, wherein light emitted from the light source unit is laser light.   The projector according to claim 12, wherein after the light having the first light intensity is projected from the projection unit, a process of verifying the stability of the amount of light emitted from the light source unit is performed. An operation process for receiving an operation from a user;
A projection step of projecting light according to the image signal;
A light intensity control step for controlling the light intensity of the light projected in the projection step,
When the operation from the user is received a plurality of times in the operation step, the light intensity is controlled in the light intensity control step according to the order in which the operation is received from the user.

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