JP2006053288A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector which can easily recognize operations and abnormal states. <P>SOLUTION: When an I/F section 14 detects the operation of turning off a power source, a control section 18 turns off a lamp 1 as a light source, and operates a fan 13, as a cooling section, for a predetermined period of time. Further, the control section 18 transmits a sound signal, serving as a trigger for causing loudspeakers Rsp and Lsp to sound for the predetermined period of time, to a voice processing section 6. Using the sound signal as the trigger, the voice processing section 6 generates voice data, composed of melody, to be supplied to the loudspeakers Rsp and Lsp via a sound source circuit 8 composed of a melody IC. The loudspeakers Rsp and Lsp output the melody sound for the predetermined period of time. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector that projects an image defined by an input video signal, and more particularly to a projector that notifies an operating state.

  In the projector, a discharge lamp capable of obtaining high brightness such as a high-pressure mercury lamp or a metal halide lamp is used as a light source. Since these discharge lamps emit light by evaporating mercury or the like enclosed in the lamp, a certain amount of time is required for the mercury to warm up and completely evaporate during lighting. Further, when the discharge lamp is turned off, it is necessary to cool the discharge lamp itself with a fan or the like over a predetermined time in order to prevent deterioration of the discharge lamp itself due to heat generated by the discharge lamp. In particular, if the user accidentally unplugs the projector during the cooling operation after the discharge lamp is turned off, the cooling fan stops and the heat dissipated by the discharge lamp is trapped inside the projector, increasing the internal temperature. However, the discharge type lamp may be deteriorated.

  For this reason, a projector that visually notifies the operating state is disclosed in Patent Document 1 below. The projector of Patent Document 1 changes the color tone of the LED according to the elapsed time in order to notify how long the cooling fan after the lamp is turned off will operate.

JP 2003-121929 A

  However, in Patent Document 1, since the LED is provided in the projector body, it is difficult to know the operation state unless the user consciously views the LED, and the power supply is accidentally turned on during the operation of the projector. There is a problem that it may be pulled out. In particular, a conference room or the like is often used with a projector installed on the ceiling in order to effectively use the space of the conference room. In this case, the user must consciously look up at the projector installed on the ceiling in order to confirm the operating state of the cooling fan. Similarly, even when the projector detects an abnormality in the operation and components and enters a power-off operation due to the abnormality detection, there is a problem that the abnormal state cannot be sufficiently recognized by visual notification.

  In order to solve the above problems, an object of the present invention is to provide a projector that can easily recognize an operation and an abnormal state.

  In order to achieve the above object, according to the present invention, there is provided a projector that projects an image defined by an input video signal, a light source unit that supplies light for image projection, and a light source unit that is cooled. A cooling unit, a storage unit that stores at least data related to a predetermined time during which the cooling unit performs a cooling operation, a voice processing unit that generates voice data to be supplied to a speaker that outputs voice, and at least a power-off input operation An I / F unit that detects an input operation based on an operation signal from an operation unit that receives the power, a power supply unit that supplies power for operating the projector, a light source unit, a cooling unit, a storage unit, a sound processing unit, And an I / F unit and a control unit that controls the operation of the power supply unit and has a timekeeping function. When the I / F unit detects a power-off input operation, the control unit turns off the light source unit and the cooling unit. The memory part Time is operated for, to the audio processing unit, and wherein the sending the sound signal as a trigger to sound the speaker when reached during or predetermined time for a predetermined time.

  According to this configuration, the loudspeaker generates sound using the audio data for a predetermined time or when the predetermined time is reached. When sounding for a predetermined time, the user can recognize that the cooling operation is being performed by a sound coming into the auditory consciousness without being conscious. Further, when the cooling operation is finished, the sound generation is finished, so that it can be understood that the power can be removed. In addition, when sounding when a predetermined time is reached, the user may recognize that the cooling operation has ended without being aware of the notification sound that naturally enters the auditory sense, and may disconnect the power. It can be recognized that the state has been reached. Therefore, even if the LED is not consciously viewed as in a conventional projector, the operation state can be grasped by the notification sound that naturally enters the auditory sense. Therefore, it is possible to provide a projector that can easily recognize the operation state.

  The projector according to the present invention further includes an opening detection unit that detects opening of the lid of the light source unit, and the control unit turns off the light source unit when the opening detection unit detects the opening of the lid of the light source unit, and cools the light source unit. It is preferable to operate the unit for a predetermined time in the storage unit and send a sound generation signal as a trigger for causing the speaker to sound during the predetermined time or when the predetermined time is reached.

  According to this configuration, when detecting the opening of the lid of the light source unit, the control unit turns off the light source unit and operates the cooling unit for a predetermined time. Therefore, the high-temperature light source unit can be quickly cooled. Therefore, even if a user touches it, it can lead to a safe state promptly. Further, the components other than the opening detection unit can commonly use a configuration such as a sound processing unit of a projector that notifies the cooling operation state during the power-off operation by sound. Therefore, since a dedicated audio processing unit or the like is not necessary, the number of parts can be reduced and the configuration can be made at low cost.

  The projector of the present invention further includes a temperature measurement unit that measures the temperature of the light source unit, and the control unit turns off the light source unit when detecting that the temperature measured by the temperature measurement unit exceeds the rated value, It is preferable to operate the cooling unit according to a predetermined time in the storage unit and send a sound generation signal as a trigger for causing the speaker to sound during the predetermined time or when the predetermined time is reached.

  According to this configuration, when the control unit detects that the temperature of the light source unit measured by the temperature measurement unit exceeds the rated value, the control unit turns off the light source unit and operates the cooling unit for a predetermined time of the storage unit. Therefore, when the temperature of the light source unit exceeds the rated value, the light source unit can be turned off so that the temperature does not further increase. Furthermore, the light source unit can be cooled for a predetermined time necessary for cooling the light source unit that is at a high temperature. In addition, the predetermined time during which the cooling unit stored in the storage unit performs the cooling operation varies depending on the temperature measured by the temperature measurement unit, and the predetermined time as the cooling time increases as the temperature increases. Is set to Therefore, the light source unit can be reliably cooled. Further, the components other than the temperature measurement unit can commonly use a configuration such as a sound processing unit of a projector that notifies the cooling operation state during the power-off operation by sound. Therefore, since a dedicated audio processing unit or the like is not necessary, the number of parts can be reduced and the configuration can be made at low cost.

  A projector of the present invention is a projector that projects an image defined by an input video signal and a light source unit that supplies light for projecting an image, and a lighting inspection that checks a lighting state of the light source unit A sound processing unit that generates sound data to be supplied to a speaker that outputs sound, an I / F unit that detects an input operation based on an operation signal from an operation unit that accepts at least a power-on input operation, and a projector that operates A power supply unit that supplies power to perform, a light source unit, a lighting detection unit, a sound processing unit, an I / F unit, and a control unit that controls the operation of the power supply unit and has a timekeeping function When the I / F unit detects a power-on input operation, the unit starts a startup operation including a lighting operation of the light source unit, and until the sound processing unit detects lighting of the light source unit based on an inspection signal from the lighting inspection unit During Other when detecting the lighting of the light source unit, and wherein the sending the sound signal as a trigger to sound the speaker.

  According to this configuration, the speaker generates sound based on the sound data until the lighting of the light source unit is detected or when the lighting of the light source unit is detected. When the speaker is sounding until the lighting of the light source unit is detected, the user can recognize that the activation operation is being performed by the sound coming into the auditory sense without being conscious. Further, when it is detected that the light source unit is turned on, the sound generation is finished, so that it is possible to recognize that the video projection is ready. In addition, when the speaker generates a sound when detecting the lighting of the light source unit, the user can recognize that the activation operation has been completed by a notification sound for notifying that the activation operation has been completed. Further, at the time of activation, when the lighting of the light source unit is detected, the activation operation is completed, so that it can be recognized visually that the projection preparation is completed by the projection image by the lighting of the light source unit. Therefore, it is possible to provide a projector capable of easily recognizing the operation state by notifying the operation state at the time of activation by sound.

  According to the projector of the present invention, it is preferable that the sound processing unit generates the sound data defining the melody or the sound based on the sound generation signal from the control unit.

  The projector according to the present invention has a predetermined time or a predetermined time required for an end operation due to power-off, an end operation due to an abnormality detection due to opening of the lid of the light source unit or an increase in temperature, and a light source unit extinguishing and lighting operation during start-up operation. When it reaches, the speaker is pronounced. According to this configuration, the loudspeaker generates a sound by sound generation data composed of a melody or sound during a predetermined time or when the predetermined time is reached. When sounding for a predetermined time, the melody is made to flow from the speaker for a predetermined time by using sound generation data including, for example, a melody. As a result, the user can recognize that the projector is operating from the melody that comes into the hearing without being conscious of the user. Also, when sounding when a predetermined time is reached, for example, sounding data composed of sound is notified that “the cooling operation has been completed. It is safe to unplug the power”.

  As a result, the user can understand the operating state by voice notification and can understand that the power supply can be removed. Furthermore, unlike a beep sound generated by a rectangular wave, the melody and voice can be heard naturally because they are not harsh. Therefore, it is possible to provide a projector that can easily recognize the operation state by notifying the operation and the abnormal state with a melody or voice.

  The projector of the present invention preferably supplies the audio data generated by the audio processing unit to the external output terminal.

  According to this configuration, the projector supplies the audio data generated by the audio processing unit to the external output terminal. Therefore, even if the projector does not include an internal speaker, the operation and abnormal state can be notified by sound if the projector is connected to the external speaker.

  The projector of the present invention further includes an operation state display unit that displays the operation state of the projector, and the control unit causes the operation state display unit to synchronize a display signal for driving the operation state display unit with the sound generation signal. It is preferable to send.

  According to this configuration, the operation state display unit displays the operation state in synchronization with the voice notification. Therefore, the user can confirm the operation state by hearing and vision. Therefore, it is possible to provide a projector that can more reliably notify the operation and abnormal state by sound and display.

  According to the projector control method of the present invention, there is provided a projector control method for projecting an image in accordance with an input video signal, wherein the input operation is detected by an operation signal from an operation unit that accepts at least an input operation for turning off the power. When the power-off input operation is detected in the input operation detection step and the input operation detection step, the light source unit that supplies light for image projection is turned off, and the cooling unit that cools the light source unit is set for a predetermined time. As a trigger for causing the speaker to emit sound during the predetermined time or when the predetermined time has been reached to the light source unit to be turned off and the audio processing unit that generates and supplies audio data to the speaker that outputs audio And a sound generation control step for sending a sound generation signal.

  According to this control method, the loudspeaker generates a sound by the sound data during a predetermined time required for cooling the light source unit or when the predetermined time is reached. Therefore, even if the LED is not consciously viewed as in a conventional projector, the operation state can be grasped by the notification sound that naturally enters the auditory sense. Therefore, it is possible to provide a projector control method capable of easily recognizing the operation and abnormal state by notifying the operation state with sound.

An embodiment of a projector according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by this embodiment.
(Embodiment 1)

  FIG. 1 is a schematic configuration diagram of a projector according to the first embodiment. The projector 100 separates the light emitted by the lamp 1 serving as the light source unit into three primary color components of red light, blue light, and green light, and converts the light into a video signal by the liquid crystal light valve 2 for each color light. This is a so-called liquid crystal three-plate type projector that modulates in response and then synthesizes again and projects it onto the screen SC. Here, a schematic configuration of projector 100 will be described first, and then a power-off routine of projector 100 will be described.

  In the projector 100, for example, a video signal Vin and an audio signal Sin are supplied via an external connection terminal (not shown) from an external audio / video supply device 3 such as a DVD player or a television receiver. Hereinafter, a state in which a DVD player is connected as the audio / video supply device 3 and a movie is being watched on a DVD will be described. The video signal Vin supplied from the DVD player is supplied with a component signal that is an analog video signal. The video signal Vin is A / D converted by the video signal processing unit 4 and further subjected to processing such as scaling and γ correction in order to obtain a signal suitable for display on the liquid crystal light valve 2. Dout is supplied to the liquid crystal panel drive unit 5. The liquid crystal panel driving unit 5 supplies the liquid crystal light valve 2 with a video signal Dout, a driving voltage, and the like, and displays an image on the liquid crystal light valve 2.

  The lamp 1 as the light source unit is, for example, a discharge lamp such as a high-pressure mercury lamp, a metal halide lamp, or a halogen lamp. Although these discharge lamps provide high brightness, they emit light by evaporating mercury or the like enclosed in the lamp, so it takes a certain time for the mercury to warm up and completely evaporate during lighting. is there. Further, when the discharge lamp is turned off, it is necessary to cool the discharge lamp itself with a fan or the like for a predetermined time in order to prevent the discharge lamp itself from being deteriorated by heat generated by the discharge lamp. The lamp driving unit 9 is turned on and off by driving the lamp 1. The temperature measuring unit 10 that measures the temperature of the lamp 1 includes a temperature sensor 11, and the temperature sensor 11 is installed in the vicinity of the lamp 1. The fan 13 as a cooling unit is rotated by a servo motor (not shown), and the lamp 1 is air-cooled by a flow of air generated by the rotation. The fan drive unit 12 drives the fan 13.

  The audio signal Sin synchronized with the video signal Vin is a stereo audio analog signal, and is supplied to the audio processing unit 6 from an external connection terminal such as a 2RCA terminal (not shown). The audio processing unit 6 includes an amplifier 7 and a sound source circuit 8. The audio processing unit 6 is connected to a right channel speaker Rsp, a left channel speaker Lsp, a right channel output terminal Rte, and a left channel output terminal Lte. The audio signal Sin is amplified by the amplifier 7 and then supplied to the speakers Rsp and Lsp as stereo audio data. The speakers Rsp and Lsp correspond to stereo sound, the speaker Rsp outputs sound corresponding to the right channel sound data, and the speaker Rsp outputs sound corresponding to the left channel sound data. The right channel audio data and the left channel audio data are supplied to the speakers Rsp and Lsp, and are also supplied to the right channel output terminal Rte and the left channel output terminal Lte. The tone generator circuit 8 is composed of a melody generating IC or a voice synthesizing IC, and generates voice data composed of a melody or a voice by a sound generation signal from the control unit 18 described later.

  The operation state display unit 21 includes three LEDs and displays the operation state of the projector 100. The three LEDs are red (R), green (G), and orange (O) color tones. The I / F unit 14 receives an input operation by an operation signal from a remote controller 15 as an operation unit that receives an input operation. The operation unit is not limited to the remote controller 15, and may be, for example, a switch (not shown) provided in the main body of the projector 100 or a USB (Universal Serial) connected to the I / F unit 14. An external device (not shown) such as an externally connected personal computer that sends an operation signal via a bus can be regarded as an operation unit. The power supply unit 16 guides an AC voltage from an external AC power supply 17 from a plug (not shown), and performs processing such as transformation, rectification, and smoothing by an internal AC / DC conversion unit (not shown). The stabilized DC voltage is supplied to each part of the projector 100.

  The control unit 18 selects an operation processing routine suitable for the operation content received by the I / F unit 14 from the storage unit 20 storing the operation processing routine of the projector 100, and is connected by a bus line according to the selected operation processing routine. Control each part. The control part 18 is comprised from MCU (Microcontoller Unit), and is provided with the time measuring part 19 which consists of a timer etc. inside.

  Subsequently, a power-off routine of the projector 100 will be described with reference to FIGS. 1 and 2. FIG. 2 is a flowchart showing a power-off routine of projector 100. The power-off routine of the projector 100 is a process of turning off the lamp 1 and cooling it for a predetermined time and returning it to a standby state waiting for an input operation receiving power supply from the AC power source 17. When the lamp 1, which is a discharge lamp, is turned off, it is necessary to cool it with a fan or the like over a predetermined time in order to prevent deterioration of the lamp 1 itself due to the heat generated by the lamp 1 being trapped. The predetermined time varies depending on the model, but even a fast model requires a cooling time of about 20 seconds. The projector 100 before entering the power-off routine is in an operation in which the lamp 1 is lit, and the green LED (G) of the operation state display unit 21 indicating that the lamp is in operation is lit.

  First, in step S <b> 1, a power-off operation signal is sent from the remote controller 15 to the I / F unit 14. The I / F unit 14 detects a power-off operation input based on a power-off operation signal, and sends a power-off operation detection signal to the control unit 18. In step S <b> 2, the control unit 18 selects a power-off routine from various operation routines stored in the storage unit 20 based on a power-off operation detection signal from the I / F unit 14. From step S3, the control unit 18 issues a command according to the selected power-off routine to each unit connected to the bus line, and the power-off routine is executed.

  In step S <b> 3, first, the control unit 18 sends a turn-off command to the lamp driving unit 9 to turn off the lamp 1. At this time, the fan 13 cools the lamp 1 by blowing air because the projector 100 is operating, but continues the cooling operation for a predetermined time after the lamp 1 is turned off. In addition, here, the timing unit 19 in the control unit 18 starts measuring a predetermined time during which the fan 13 included in the power-off routine of the storage unit 20 performs the cooling operation. Further, the control unit 18 sends the sound generation signal to the sound processing unit 6 and the display signal to the operation state display unit 21.

  In step S4, sound data based on a melody is generated by the tone generator circuit 8 in the sound processing unit 6 based on the sound generation signal. The sound source circuit 8 is composed of a melody IC, and can generate sound data based on a plurality of melody. Here, since the melody selection information is included in the sound generation signal, a melody indicating that the power-off operation is being performed can be selected from the sound data of a plurality of melody. In step S5, the sound data based on the melody generated by the sound source circuit 8 is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. The speakers Rsp and Lsp output a melody sound based on the audio data.

  Here, the sound data based on the melody generated by the sound source circuit 8 composed of the melody IC may be monaural sound data or stereo sound data. The audio data is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. However, the audio data may be supplied only to the left channel of the speaker Lsp and the output terminal Lte. In addition, the operation state display unit 21 switches the green LED (G) from lighting indicating that the green LED (G) is operating to blinking that indicates that the power is being turned off by a display signal sent in synchronization with the sound generation signal. In step S6, it is confirmed whether or not the predetermined time at which time measurement was started in step S3 has been reached. When the predetermined time has not been reached, the process of step S5 is continued. When the predetermined time is reached, the process proceeds to step S7.

  In step S <b> 7, the control unit 18 sends a stop command to the fan drive unit 12 to stop the fan 13 because the predetermined time has been reached. Further, a stop command is sent to the voice processing unit 6 and a display signal is sent to the operation state display unit 21. The sound processing unit 6 stops the supply of sound data by melody to the speakers Rsp and Lsp and the output terminals Rte and Lte by a stop command. The operation state display unit 21 turns off the green LED (G) in response to the display signal, and turns on the orange LED (O) indicating the standby state waiting for an input operation receiving power supply from the AC power supply 17. As a result, the power-off routine ends and enters a standby state, and it is safe even if a plug (not shown) is removed from the AC power source 17.

As described above, according to the first embodiment, the following effects can be obtained.
(1) When the I / F unit 14 detects a power-off input operation, the control unit 18 turns off the lamp 1 serving as the light source unit, and causes the fan driving unit 12 to replace the fan 13 serving as the cooling unit with a predetermined amount in the storage unit 20. Operate for hours. Furthermore, the control unit 18 sends a sound generation signal as a trigger for causing the speaker to sound for a predetermined time to the sound processing unit 6. The sound processing unit 6 generates sound data composed of a melody to be supplied to a speaker by a sound source circuit 8 composed of a melody IC using a sound generation signal as a trigger.

  Thereby, the speakers Rsp and Lsp output a melody sound for a predetermined time. Since the melody is sounded for a predetermined time, the user can recognize that the cooling operation is being performed by the melody that comes into the hearing without being conscious. Further, when the cooling operation is finished, the melody is finished, so that it can be understood that it is possible to remove the plug (not shown) from the AC power source 17. Therefore, it is possible to provide the projector 100 that can easily recognize the operation state by notifying the operation state by sound even when the LED is not consciously viewed as in the conventional projector. Therefore, for example, even when the projector 100 is installed on the ceiling, there is no need to consciously look up at the projector body in order to confirm the operating state. Furthermore, unlike a beep sound generated by a rectangular wave, the melody is not harsh and can be heard naturally.

  (2) The control unit 18 sends a display signal synchronized with the sound generation signal to the operation state display unit 21. The operation state display unit 21 blinks the green LED (G) indicating that the power-off operation is being performed for a predetermined time according to the display signal. Further, when a predetermined time is reached, a display signal for indicating a standby state is sent to the operation state display unit 21. The operation state display unit 21 turns off the green LED (G) according to the display signal and turns on the orange LED (O) indicating the standby state. Thereby, even if the user is not conscious, when the user recognizes the operation of the projector 100 by the notification by the melody that naturally enters the auditory sense and wants to confirm the state, the user can turn the line of sight toward the projector main body. The operating state can be reliably recognized by the color, blinking, and lighting display of the LED synchronized with the notification. Therefore, it is possible to provide the projector 100 that can more reliably notify the operation state by sound and display.

  (3) The voice data based on the melody generated by the tone generator circuit 8 is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. According to this configuration, the sound generation data generated by the sound processing unit 6 can be supplied to the external output terminals Rte and Lte even in a projector having no internal speaker but having an external sound output terminal. Thereby, even if it is a projector which is not provided with an internal speaker, if it is connected to the external speaker, the operation and the abnormal state can be notified by sound.

(4) Furthermore, since the operating state can be easily recognized by notifying the operating state by sound, for example, a user who unplugs the plug (not shown) from the AC power source 17 during the operation of the projector 100, for example. It is possible to reduce misoperations.
(Embodiment 2)

  Subsequently, a second embodiment of the present invention will be described based on the drawings. In addition, the same code | symbol is attached | subjected to the part same as description in Embodiment 1, and the overlapping description is abbreviate | omitted. In the projector 100 according to the second embodiment, the sound source circuit 8 in the voice processing unit 6 includes a voice synthesis IC instead of the melody IC according to the first embodiment. Other configurations are the same as those of the first embodiment. FIG. 3 is a flowchart showing a temperature abnormality processing routine of projector 100. Hereinafter, the temperature abnormality processing routine of the projector 100 will be described with reference to FIGS. 1 and 3.

  The temperature abnormality processing routine of the projector 100 means that when the temperature of the lamp 1 exceeds a rated value for some reason, the lamp 1 is turned off and cooled for a predetermined time to forcibly stand by in order to prevent the lamp 1 from deteriorating. It is a process to return to. In this case, the predetermined time for cooling the lamp 1 varies depending on the detected temperature, and the predetermined time as the cooling time is set longer in the storage unit 20 as the temperature increases. This is because the temperature of the lamp 1 is higher than the rated value, so that the normal cooling time is not enough to return to normal temperature.

  When the lamp 1 is turned on and the projector 100 is in an operating state, the temperature measurement unit 10 periodically measures the temperature of the lamp 1 according to a control command from the control unit 18. The temperature sensor 11 connected to the temperature measuring unit 10 is a thermistor, and is installed in the vicinity of the lamp 1. The temperature of the lamp 1 is periodically measured at a cycle of about once every 0.5 seconds, and the temperature of the measurement signal is detected. Send to part 10. In addition, the projector 100 before entering the power-off routine is in an operation in which the lamp 1 is lit, and the green LED (G) of the operation state display portion indicating that the lamp is in operation is lit.

  In step S11, the temperature measurement unit 10 converts the measurement signal from the temperature sensor 11 periodically sent at a cycle of about once every 0.5 seconds into a temperature signal by A / D conversion, and then controls the control unit 18. Send to. In step S12, the control unit 18 compares the temperature signal from the temperature detection unit 10 with the temperature table stored in the storage unit 20, and checks whether the temperature of the lamp 1 exceeds the rated value. When the temperature of the lamp 1 is within the rated value, the process returns to step S11 and the temperature measurement is continued. When the temperature of the lamp 1 exceeds the rated value, the process proceeds to step S13. In step S <b> 13, the control unit 18 detects that the lamp 1 is at an abnormal temperature based on the temperature signal from the temperature measurement unit 10, and therefore the temperature abnormality processing routine is selected from the various operation routines stored in the storage unit 20. Select. From step S14, the control unit 18 issues a command according to the selected temperature abnormality processing routine to each unit connected to the bus line, and the temperature abnormality processing routine is executed.

  In step S <b> 14, first, the control unit 18 sends a turn-off command to the lamp driving unit 9 to turn off the lamp 1. At this time, the fan 13 as a cooling unit cools the lamp 1 by blowing air because the projector 100 is operating, but continues the cooling operation for a predetermined time even after the lamp 1 is turned off. In addition, here, the timing unit 19 in the control unit 18 starts measuring a predetermined time during which the fan 13 included in the power-off routine of the storage unit 20 performs the cooling operation. As described above, the length of the predetermined time at this time is set so that the predetermined time as the cooling time becomes longer as the temperature of the lamp 1 becomes higher. Further, the control unit 18 sends a display signal to the operation state display unit 21. In step S15, the operation state display unit 21 turns off the green LED (G) by the display signal, and blinks the red LED (R) indicating that the power-off operation is being performed due to temperature abnormality. In step S16, it is confirmed whether or not the predetermined time at which time measurement was started in step S14 has been reached. When the predetermined time has not been reached, the red LED (R) in step S15 continues to blink. When the predetermined time is reached, the process proceeds to step S17.

  In step S <b> 17, the control unit 18 sends a sound generation signal to the sound processing unit 6 because the predetermined time has been reached, and a display signal for switching the red LED (R) from blinking to lighting to the operation state display unit 21. In step S18, sound data based on sound is generated by the sound source circuit 8 in the sound processing unit 6 based on the sound generation signal. The sound source circuit 8 is composed of a voice synthesis IC, and can generate voice data based on a plurality of voice patterns expressing operations and abnormal states. Here, since the sound signal includes the selection information of the sound pattern, the sound pattern indicating that the temperature abnormality processing operation is being performed can be selected from the sound data of a plurality of sound patterns. As the sound pattern indicating that the temperature abnormality processing operation is in progress, for example, a sound pattern such as “A lamp temperature abnormality has been detected. The power is turned off.” Is selected. In step S19, audio data based on the audio pattern generated by the sound source circuit 8 is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. Speakers Rsp and Lsp say "Lamp temperature abnormality is detected. Power is turned off" by voice data.

  In step S20, the control unit 18 sends a stop command to the fan drive unit 12 to stop the fan 13 because the predetermined time has been reached. The operation state display unit 21 switches the red LED (R) from blinking to lighting by a display signal, and displays that it has been forcibly terminated by detecting an abnormal state.

  As described above, according to the configuration of the second embodiment, the following effects can be obtained in addition to the effects of the first embodiment.

  (1) When the control unit 18 detects a temperature abnormality of the lamp 1 as the light source unit from the temperature signal from the temperature detection unit 10, the control unit 18 turns off the lamp 1, and the fan driving unit 12 stores the fan 13 as the cooling unit. Operate according to 20 predetermined times. Furthermore, the control unit 18 sends a sound generation signal as a trigger for sounding the speakers Rsp and Lsp to the sound processing unit 6 when a predetermined time is reached. The sound processing unit 6 generates sound data composed of sound patterns to be supplied to the speakers Rsp and Lsp in the sound source circuit 8 composed of a sound synthesizing IC with the sound generation signal as a trigger. As a result, the speakers Rsp and Lsp say, “A lamp temperature abnormality has been detected. The power is turned off.” When a predetermined time is reached. Since the user can hear the detection of the abnormal state by words and the explanation of the processing state, the state of the projector 100 can be easily recognized. Therefore, it is possible to provide the projector 100 that can easily recognize the abnormal state by notifying the abnormal state with sound.

  (2) The control unit 18 compares the temperature signal from the temperature detection unit 10 with the temperature table stored in the storage unit 20, and checks whether the temperature of the lamp 1 exceeds the rated value. When the temperature abnormality of the lamp 1 is detected, the lamp 1 is turned off, and the fan drive unit 12 operates the fan 13 as a cooling unit according to a predetermined time in the storage unit 20. Thereby, when the temperature of the lamp 1 exceeds the rated value, the lamp 1 can be turned off so that the temperature does not rise any further. The predetermined time for cooling the high-temperature lamp 1 varies depending on the detected temperature, and is set in the storage unit 20 so that the predetermined time as the cooling time becomes longer as the temperature becomes higher. . Therefore, the lamp 1 as the light source unit can be reliably cooled.

(3) The configuration for notifying the temperature abnormality of the lamp 1 by sound is the same as the basic configuration of the projector 100 except for the temperature measurement unit 10 and the temperature sensor 11. Accordingly, since a new dedicated audio processing unit or the like is not required, the number of parts can be reduced and a low-cost configuration can be achieved.
(Embodiment 3)

  Subsequently, a third embodiment of the present invention will be described with reference to the drawings. The same parts as those of the projector 100 according to the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 4 is a schematic configuration diagram of the projector according to the third embodiment. The projector 110 according to the third embodiment does not include the temperature measurement unit 10 and the temperature sensor 11 in the projector 100 according to the second embodiment. In place of the temperature measurement unit 10 and the temperature sensor 11, the projector 110 includes a lamp lid 30 used when replacing the lamp 1 as the light source unit, a detection switch 31 that detects the opening of the lamp lid 30, and an opening from the detection switch 31. An opening detection unit 32 that detects the opening of the lamp lid 30 based on the detection signal is provided. The other configuration is the same as that of the projector 100. FIG. 5 is a flowchart showing a lamp lid opening process routine of the projector 110. Hereinafter, the lamp lid opening process routine of the projector 110 will be described with reference to FIGS. 4 and 5.

  The lamp 1 has a high temperature of about 600 ° C. when it is lit. The lamp lid opening process routine of the projector 110 is to turn off the lamp 1 in order to prevent danger due to exposure of the high temperature lamp 1 when the lamp lid 30 is opened for some reason during the operation of the projector 110. It is a process of cooling for a predetermined time and forcibly returning to a standby state. The detection switch 31 is a mechanical switch and is attached to the opening / closing part of the lamp lid 30. The detection switch 31 always detects the open state of the lamp lid 30 while the power from the AC power supply 17 is supplied to the projector 110. The projector 110 before entering the lamp lid opening process routine is in an operation in which the lamp 1 is lit, and the green LED (G) of the operation state display section indicating that the lamp is in operation is lit.

  In step S <b> 31, the opening detection unit 32 constantly monitors the change in the open / close signal of the detection switch 31. In step S32, the opening detection unit 32 continues the detection of opening of the lamp lid 30 in step S31 when there is no change in the open / close signal and the lamp lid 30 remains closed. When the opening / closing signal is detected to detect the opening of the lamp cover 30, an opening detection signal is sent to the control unit 18. In step S <b> 33, the control unit 18 detects the opening of the lamp lid 30 based on the opening detection signal, and therefore selects a lamp lid opening processing routine from various operation routines stored in the storage unit 20. From step S34, the control unit 18 issues a command according to the selected lamp cover opening process routine to each part connected to the bus line, and the lamp cover opening process routine is executed.

  In step S34, first, the control unit 18 sends a turn-off command to the lamp driving unit 9 to turn off the lamp 1. At this time, the fan 13 cools the lamp 1 by blowing air because the projector 110 is in operation, but continues the cooling operation for a predetermined time after the lamp 1 is turned off. In addition, the timer 19 in the control unit 18 starts measuring a predetermined time during which the cooling unit included in the power-off routine of the storage unit 20 performs the cooling operation. Further, the control unit 18 sends a sound generation signal to the sound processing unit 6 and a display signal to the operation state display unit 21.

  In step S35, sound data based on sound is generated by the sound source circuit 8 in the sound processing unit 6 based on the sound generation signal. The sound source circuit 8 is composed of a voice synthesis IC, and can generate voice data based on a plurality of voice patterns expressing operations and abnormal states. Here, since the sound signal includes the selection information of the sound pattern, the sound pattern indicating that the temperature abnormality processing operation is being performed can be selected from the sound data of a plurality of sound patterns. The voice pattern indicating that the temperature abnormality processing operation is in progress is selected, for example, a voice pattern such as “Lamp cover is open. In step S36, audio data based on the audio pattern generated by the sound source circuit 8 is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. Speakers Rsp and Lsp say "The lamp cover is open. The power will be turned off."

  In step S <b> 37, the operation state display unit 21 turns off the green LED (G) by a display signal synchronized with the sound generation signal, and indicates a red LED (R) indicating that the power-off operation is being performed by opening the lamp cover 30. Blinks. In step S38, it is confirmed whether or not the predetermined time at which time measurement was started in step S34 has been reached. When the predetermined time has not been reached, the red LED (R) in step S37 continues to blink. When the predetermined time is reached, the process proceeds to step S39.

  In step S39, since the predetermined time has been reached, the control unit 18 sends a stop command to the fan drive unit 12 to stop the fan 13. In addition, a display signal is sent to the operation state display unit 21. The operation state display unit 21 switches the red LED (R) from blinking to lighting by a display signal, and displays that it has been forcibly terminated by detecting an abnormal state. In order to restart in this state, it is necessary to close the lamp cover 30. Incidentally, when the lamp cover 30 is open when the projector 110 is in the standby state, the open detection unit 32 detects a change in the open / close signal of the detection switch 31 and sends the open detection signal to the control unit 18. Receiving the opening detection signal, the control unit 18 performs control so as not to accept the startup operation input of the projector 110.

  As described above, according to the configuration of the third embodiment, the following effects can be obtained in addition to the effects of the respective embodiments.

  (1) When the controller 18 detects the opening of the lamp lid 30 based on the opening detection signal from the opening detector 32, the controller 18 turns off the lamp 1 and causes the fan drive unit 12 to operate the fan 13 as a cooling unit for a predetermined time. . Thereby, the high temperature lamp 1 can be quickly cooled. Therefore, even if a user touches, a safe state can be ensured promptly. Further, since the lamp 1 is cooled for a predetermined time, the deterioration of the lamp 1 can be prevented.

  (2) The control unit 18 sends a sound generation signal to the sound processing unit 6 when the predetermined time starts during the predetermined time. The speakers Rsp and Lsp say “The lamp cover is open. The power will be turned off.” When a predetermined time is started by the sound data generated from the sound generation signal. Thereby, since the user can hear the detection of the abnormal state by words and the explanation of the processing state, the state of the projector 110 can be easily recognized. Therefore, it is possible to provide the projector 110 that notifies the abnormal state and the operation state easily by voice.

(3) As a configuration for notifying the opening abnormality of the lamp lid 30 by sound, the parts other than the lamp lid 30, the opening detection unit 32, and the detection switch 31 are the same as the basic configuration of the projector 100. . Accordingly, since a new dedicated audio processing unit or the like is not required, the number of parts can be reduced and a low-cost configuration can be achieved.
(Embodiment 4)

  Next, a fourth embodiment of the present invention will be described with reference to the drawings. The same parts as those of the projector 100 according to the first embodiment are denoted by the same reference numerals, and redundant description is omitted. FIG. 6 is a schematic configuration diagram of a projector according to the fourth embodiment. The projector 120 according to the fourth embodiment does not include the temperature measurement unit 10 and the temperature sensor 11 in the projector 100 according to the first embodiment. The projector 120 includes a lighting inspection unit 40 that inspects lighting of the lamp 1 as a light source unit and an optical sensor 41 that detects the amount of light, instead of the temperature measurement unit 10 and the temperature sensor 11. The other configuration is the same as that of the projector 100. FIG. 6 is a flowchart showing a startup routine of projector 120. Hereinafter, a startup routine of the projector 120 will be described with reference to FIGS. 6 and 7.

  The discharge lamp 1 emits light by evaporating mercury or the like enclosed in the lamp, although high brightness is obtained. When the lamp is turned on, a certain time is required until the mercury is warmed and completely evaporated. is there. The startup routine of the projector 120 is a process for starting the projector 120 from the standby state to the operating state including the lighting operation of the lamp 1. The optical sensor 41 is a photodiode, and is attached at a position where a part of the light emitted from the lamp 1 enters the light receiving surface of the optical sensor 41 in the vicinity of the lamp 1. When the lamp 1 is turned on, the optical sensor 41 sends a light detection signal proportional to the amount of light incident on the light receiving surface to the lighting inspection unit 40. The projector 120 before entering the startup routine is in a standby state waiting for an input operation receiving power supply from the AC power supply 17, and an orange LED (O) indicating the standby state of the operation state display unit 21 is lit.

  First, in step S41, a power-on operation signal is sent to the I / F unit 14 from the remote controller 15 as the operation unit. The I / F unit 14 detects a power-on input operation based on a power-on operation signal, and sends a detection signal to the control unit 18. In step S <b> 42, the control unit 18 selects a startup routine from various operation routines stored in the storage unit 20 based on the detection signal of the power-on input operation from the I / F unit 14. From step S43, the control unit 18 issues a command according to the selected startup routine to each unit connected to the bus line, and the startup routine is executed.

  In step S43, first, the control unit 18 sends an initialization command to each unit connected to the bus line. Each unit performs initialization processing according to the initialization command. Further, the control unit 18 sends the sound generation signal to the sound processing unit 6 and the display signal to the operation state display unit 21. In step S44, sound data based on a melody is generated by the tone generator circuit 8 in the sound processing unit 6 based on the sound generation signal. The sound source circuit 8 is composed of a melody IC, and can generate sound data based on a plurality of melody. Here, since the melody selection information is included in the sound generation signal, it is possible to select a melody indicating that it is being activated from voice data of a plurality of melody. In step S45, the sound data based on the melody generated by the sound source circuit 8 is supplied to the speakers Rsp and Lsp and the output terminals Rte and Lte. The speakers Rsp and Lsp output a melody sound based on the audio data. In addition, the operation state display unit 21 turns off the orange LED (O) by the display signal sent in synchronization with the sound generation signal, and blinks the green LED (G) indicating that the operation is in progress.

  In step S46, the number of times the lamp 1 has been turned on in step S47, which will be described later, is counted. When the lamp 1 is turned on for the fourth time, the process proceeds to a lighting abnormality processing routine in step S50. In the lighting abnormality processing routine of step S50, the operation state display unit 21 performs processing such as blinking the red LED (R) indicating lighting abnormality, but the description is omitted because it is not the gist of the present invention. When the lighting operation of the lamp 1 is less than four times, the process proceeds to step S47.

  In step S <b> 47, the control unit sends a lamp 1 lighting command to the lamp driving unit 9. The lamp driving unit 9 performs a lighting operation of the lamp 1 such as forming a discharge path by applying a high frequency high voltage between the electrodes of the lamp 1 by an igniter circuit (not shown) according to a lighting command. In step S <b> 48, the lighting inspection unit 40 inspects the lighting state of the lamp 1 based on the light detection signal from the optical sensor 41, and sends the inspection signal to the control unit 18. The control unit 18 detects the lighting state of the lamp 1 by comparing the inspection signal with the lighting state table stored in the storage unit 20. If it is detected that the lamp 1 is not lit, the process returns to step S45, and the output of the melody sound and the blinking of the green LED (G) are continued. If lighting of the lamp 1 is detected, the process proceeds to step S49.

  In step S49, the control unit 18 sends a stop command to the sound processing unit 6 and a display signal to the operation state display unit 21 because the lamp 1 is lit. The sound processing unit 6 stops the supply of sound data by melody to the speakers Rsp and Lsp and the output terminals Rte and Lte by a stop command. The operating state display unit 21 switches the green LED (G) from blinking to lighting in response to the display signal, and displays that the start process has been completed and the operation state has been entered.

  As described above, according to the configuration of the fourth embodiment, the following effects can be obtained in addition to the effects of the respective embodiments.

  (1) When the I / F unit 14 detects a power-on input operation, the control unit 18 starts a start-up operation including a lighting operation of the lamp 1. Further, the control unit 18 inspects the sound processing unit 6 from the lighting inspection unit 40. Until the lighting of the lamp 1 is detected by the signal, a sound generation signal is sent as a trigger for causing the speakers Rsp and Lsp to sound. The sound processing unit 6 generates sound data composed of a melody that is supplied to the speaker using a sound generation signal as a trigger. Thus, the speakers Rsp and Lsp output a melody for a predetermined time. The user can recognize that the projector 120 is being activated by the melody that comes into the hearing without being conscious of it. Further, when it is detected that the lamp 1 is turned on, it is understood that the melody is finished and the image can be projected. Therefore, it is possible to provide the projector 120 that can easily recognize the operation state by notifying the operation state at the time of activation by sound.

  In addition, this invention is not limited to each embodiment mentioned above, A various change, improvement, etc. can be added to each embodiment mentioned above. A modification will be described below.

  (Modification 1) This will be described with reference to FIG. 6 and FIG. The sound processing unit 6 of each of the embodiments includes the sound source circuit 8 formed of the melody IC or the voice synthesis IC, but is not limited to including the sound source circuit 8. For example, instead of the sound source circuit 8, a plurality of patterns of beep sound can be stored in the frequency dividing circuit (not shown) of the control unit 18 and the storage unit 20, thereby generating sound data. First, a frequency that is easy for humans to hear, for example, 4 kHz, is generated by dividing the operation clock of the control unit 18 by a frequency dividing circuit (not shown) of the control unit 18. In the storage unit 20, a plurality of patterns for intermittently generating the 4 kHz frequency generated by the control unit 18 are stored.

  For example, when waiting for lighting of the lamp 1 in the start-up routine in the fourth embodiment, the pattern “Pip, Pip, Pip ...” is selected, and the “Pip” time is set to 100 ms and “Pip” is selected. And pronounce the interval between “pits” in 2 seconds. This pattern sound is generated until the lamp 1 is turned on in step S48 instead of the melody. Further, in the lamp lid opening routine in the third embodiment, a pattern of “pea, pea, pea, pea, pea, pea, pea, pea” is selected, and the time of “pea” is set to 2 s, “pea”. , “P” intervals are pronounced in 2s. This pattern sound is generated instead of the sound when the predetermined time starts during the predetermined time in step S35 of FIG. As described above, by storing a plurality of beep sound patterns corresponding to the operation and abnormal state of the projector in the storage unit 20, the operation and abnormal state of the projector are notified by the beep sound even without the sound source circuit 8. be able to.

  (Modification 2) This will be described with reference to FIG. The projector according to each of the embodiments has a configuration in which an audio signal Sin from the outside is received by the audio processing unit 6 and subjected to processing such as amplification by the amplifier 7 and then output to the speakers Rsp and Lsp or the external output terminals Rte and Rte. However, the present invention is not limited to this configuration. For example, the present invention can be applied to a projector that does not have a configuration for receiving an external audio signal Sin, and that does not have an output speaker and an external output terminal. In this case, instead of the audio processing unit 6, a notification unit that outputs audio data based on a beep sound is connected to the bus line, and a piezoelectric buzzer is connected to the notification unit. The beep sound pattern signal described in the first modification is supplied from the control unit 18 to the notification unit. The notification unit supplies the beep sound pattern signal as it is to the piezoelectric buzzer. Further, in order to increase the sound pressure of the beep sound, a boosting circuit including one general-purpose transistor and one boosting coil may be added inside the notification unit.

  Thereby, in a projector having no voice input and no voice output, the operation and abnormal state of the projector can be notified by a beep sound. In addition, a sound notification function can be easily added with a configuration of a small number of components such as adding a piezoelectric buzzer and a booster circuit to the notification unit. Furthermore, since these additional parts can be obtained at low cost, the manufacturing cost can be reduced.

  (Modification 3) In each of the above-described embodiments and modifications, the technology that can easily recognize the operation state and the abnormal state by notifying the operation state with sound projects an image on a screen provided outside. The projector is not limited to a projection type projector. Any electronic device that requires a predetermined time to reach a desired state in startup, termination, and abnormal states can be applied. For example, the present invention can be applied to a rear projector that includes an optical system substantially similar to a projection projector and projects a projected image from the back onto a transmission screen provided in the same individual. In addition, although the light modulation unit of the projector according to each of the embodiments and the modifications is configured to use a transmissive liquid crystal light valve, the present invention is not limited to this. For example, a reflective liquid crystal display device or a tilt mirror device may be used.

  (Modification 4) This will be described with reference to FIG. The projector according to each of the embodiments and the modifications is configured to be supplied with the video signal Vin and the audio signal Sin from the video / audio supply device 3 installed outside, but is not limited to this configuration. . For example, a video signal and an audio signal may be received from a personal computer (both not shown) connected to the outside via a USB connected to the I / F unit 14. A function expansion card for connecting a local area network is attached to the I / F unit 14 to receive a video signal and an audio signal from a client computer (none of which is shown) connected to the local network. It can also be configured. In this case, if the local network is connected to the Internet, video signals and audio signals can also be received from a server computer (not shown) connected to the Internet.

  The technical ideas other than the contents described in the claims that can be grasped from the respective embodiments and modifications will be described below together with the effects thereof.

  A projector control method for projecting an image defined by an input video signal, wherein an input operation is detected by an operation signal from an operation unit that receives an input operation, and the input operation detection step When the power-off input is detected, the light source unit that supplies light for projecting the image is turned off, the light source unit turning off process for operating the cooling unit that cools the light source unit for a predetermined time, and the sound to the speaker that outputs sound A projector control method comprising: a sound generation control step of sending a sound generation signal as a trigger for causing the speaker to sound when the predetermined time starts to a sound processing section that generates and supplies data.

  According to this control method, in the input operation detection step, an input operation is detected by an operation signal from the operation unit. In the light source unit extinguishing step, when a power-off input is detected in the input operation detecting step, the light source unit is extinguished and the cooling unit that cools the light source unit is operated for a predetermined time. In the sound generation control step, a sound generation signal as a trigger for causing the speaker to sound when a predetermined time starts is sent to the sound processing unit. As a result, the speaker generates sound based on the audio data when a predetermined time required for cooling the light source unit starts. Therefore, it is possible to provide a projector control method capable of easily recognizing the operation and abnormal state by notifying the operation state with sound.

1 is a schematic configuration diagram of a projector according to a first embodiment. The flowchart of a power-off routine. The flowchart of a temperature abnormality process routine. FIG. 6 is a schematic configuration diagram of a projector according to a third embodiment. 7 is a flowchart of a lamp lid opening process routine. FIG. 6 is a schematic configuration diagram of a projector according to a fourth embodiment. The flowchart of a starting routine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Lamp as light source part, 2 ... Liquid crystal light valve, 3 ... Image | video audio | voice supply apparatus, 4 ... Video signal processing part, 5 ... Liquid crystal panel drive part, 6 ... Audio | voice processing part, 7 ... Amplifier, 8 ... Sound source circuit, DESCRIPTION OF SYMBOLS 9 ... Lamp drive part, 10 ... Temperature measurement part, 11 ... Temperature sensor, 12 ... Fan drive part, 13 ... Fan as cooling part, 14 ... I / F part, 15 ... Remote control as operation part, 16 ... Power supply part 17 ... AC power source, 18 ... control unit, 19 ... timer, Vin, Dout ... video signal, Sin ... audio signal, Rsp ... right speaker, Lsp ... left speaker, Rte ... right channel output terminal, Lte ... left channel output Terminal, SC ... screen.

Claims (8)

A projector that projects an image defined by an input video signal,
A light source unit that supplies light for projecting the image;
A cooling unit for cooling the light source unit;
A storage unit that stores at least data related to a predetermined time during which the cooling unit performs a cooling operation;
An audio processing unit that generates audio data to be supplied to a speaker that outputs audio;
An I / F unit that detects an input operation based on an operation signal from an operation unit that accepts at least an input operation to turn off the power;
A power supply for supplying power for operating the projector;
The light source unit, the cooling unit, the storage unit, the sound processing unit, the I / F unit, a control unit that controls the operation of the power supply unit and has a timekeeping function,
When the I / F unit detects the power-off input operation, the control unit turns off the light source unit, operates the cooling unit for the predetermined time of the storage unit, and causes the audio processing unit to perform the predetermined operation. A sound generation signal is sent as a trigger for causing the speaker to generate sound during a period of time or when the predetermined time is reached. Furthermore, an opening detection unit for detecting the opening of the lid of the light source unit,
The control unit turns off the light source unit when the opening detection unit detects the opening of the lid of the light source unit, operates the cooling unit for the predetermined time of the storage unit, and causes the sound processing unit to The projector according to claim 1, wherein a sound generation signal is transmitted as a trigger for causing the speaker to sound during the predetermined time or when the predetermined time is reached. Furthermore, a temperature measuring unit that measures the temperature of the light source unit is provided,
When the control unit detects that the temperature measured by the temperature measurement unit exceeds a rated value, the control unit turns off the light source unit, operates the cooling unit according to the predetermined time of the storage unit, and The projector according to claim 1, wherein a sound generation signal is sent to the processing unit as a trigger for causing the speaker to sound during the predetermined time or when the predetermined time is reached. A projector that projects an image defined by an input image signal image signal,
A light source for supplying light for image projection;
A lighting inspection unit for confirming a lighting state of the light source unit;
An audio processing unit that generates audio data to be supplied to a speaker that outputs audio;
An I / F unit that detects an input operation based on an operation signal from an operation unit that accepts at least a power-on input operation;
A power supply for supplying power for operating the projector;
The light source unit, the lighting detection unit, the sound processing unit, the I / F unit, and a control unit that controls the operation of the power supply unit and has a clocking function,
When the I / F unit detects the power-on input operation, the control unit starts a start-up operation including a lighting operation of the light source unit, and the sound processing unit receives the inspection signal from the lighting inspection unit. A projector that transmits a sound generation signal as a trigger for generating sound from the speaker until the lighting of the light source unit is detected or when the lighting of the light source unit is detected.   The projector according to claim 1, wherein the voice processing unit generates the voice data that defines a melody or a voice based on the sound generation signal from the control unit.   The projector according to claim 1, wherein the sound processing unit supplies the sound data to an external output terminal. Furthermore, an operation state display unit for displaying the operation state of the projector is provided,
7. The control unit according to claim 1, wherein the control unit sends a display signal for driving the operation state display unit in synchronization with the sound generation signal to the operation state display unit. projector. A method of controlling a projector that projects an image according to an input video signal,
An input operation detection step of detecting an input operation based on an operation signal from an operation unit that accepts at least an input operation of turning off the power;
When the power-off input operation is detected in the input operation detection step, the light source unit turn-off step of turning off the light source unit that supplies light for image projection and operating the cooling unit that cools the light source unit for a predetermined time When,
A sound generation control step of sending a sound generation signal as a trigger for causing the speaker to sound during the predetermined time or when the predetermined time is reached, to a sound processing unit that generates and supplies sound data to a speaker that outputs sound And a projector control method.

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