JP2013054388A - Projection device, projection control method, and program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To specify, when a light source lamp is unexpectedly extinguished, a factor of extinguishment and to respond to the factor.SOLUTION: A projection device comprises: a light source lamp 18 comprising gas sealed within a tube and emitting light by electrification; projection systems 14-17 and 19-25 for forming a light image using the light emitted by the light source lamp 18 and emitting it toward a projection object; a microphone 27 for detecting breakage of the light source lamp 18; a CPU 28 for temporarily stopping, according to the detection by the microphone 27, the electrification to the light source lamp 18 and a projecting operation in the projection systems 14-17 and 19-25; a main memory 29; and a program memory 30.

Description

  The present invention relates to a projection apparatus, a projection control method, and a program that use a discharge lamp such as a high-pressure mercury lamp as a lamp of a light source.

  Conventionally, a lamp drive circuit, a fan drive circuit that drives a cooling fan, and a photosensor that detects the light emission state of the lamp, and the fan drive circuit is controlled by detecting light from the lamp by the photosensor. Thus, a technology of a cooling device for a projection display device is considered in which the fan is maintained in a rotating state while the lamp is lit. (For example, Patent Document 1)

JP 2002-156704 A

  The technique described in the above-mentioned technical document 1 detects the fact that the lamp is actually lit regardless of whether the apparatus is normal or abnormal, and maintains the operation of the cooling fan.

  However, when the lamp of the light source is turned off for reasons other than the expected operation, including the technique of Patent Document 1, the user cannot identify whether the lamp has exploded or is due to other factors. .

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a projection apparatus that can identify and deal with the cause when the lamp of the light source is turned off unexpectedly, To provide a projection control method and program.

The invention according to claim 1 is a projection apparatus, comprising: a light source lamp that emits light when energized; a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target; and the light source. Detection means for detecting breakage of the lamp, and control means for stopping energization of the light source lamp according to the detection by the detection means, the control means at the projection means according to the detection by the detection means In addition to stopping the projection operation, the control means has a determination means for determining that the light source lamp has been replaced, and the projection is performed when the determination means determines that the light source lamp has been replaced. The stopping of the projection operation by the means is released, and energization to the light source lamp is started.

  The invention described in claim 2 is the invention described in claim 1, further comprising holding means for holding the detection result of the detecting means when the apparatus is turned off.

The invention according to claim 3 is the invention according to claim 1 or 2, wherein the detection means is
The image processing apparatus includes an image capturing unit that captures an image of the light source lamp, and a determination unit that determines whether the light source lamp is damaged from an image signal obtained by the image capturing unit.
According to a fourth aspect of the present invention, in the invention according to the third aspect, the determination means compares the image data of the image signal with reference image data of a light source lamp stored in advance by pattern matching processing. It is determined whether the light source lamp is damaged or not.
According to a fifth aspect of the present invention, in the first or second aspect of the invention, the detection means collects sound in a region including the light source lamp, and an audio signal obtained by the sound collection means. And determining means for determining whether or not the sound pressure exceeds a predetermined threshold value.

  According to a sixth aspect of the present invention, in the first or second aspect of the invention, the detection means includes a pressure detection means for detecting a pressure in a region including the light source lamp, and a pressure signal obtained by the pressure detection means. And determining means for determining whether or not a predetermined threshold value is exceeded.

The invention according to claim 7 is a projection control method, comprising: a light source lamp that emits light when energized; and a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target. A projection control method for a projection apparatus, comprising: a detection step of detecting breakage of the light source lamp; and a control step of stopping energization of the light source lamp in accordance with detection in the detection step. In accordance with the detection in the detection step, the projection operation in the projection unit is stopped, and the control step includes a determination step of determining that the light source lamp has been replaced, and the light source lamp of the light source lamp is determined in the determination step. When it is determined that the replacement has been performed, the stop of the projection operation in the projection unit is canceled, and the energization of the light source lamp is started.

  According to an eighth aspect of the present invention, there is provided a computer built in a projection apparatus comprising: a light source lamp that emits light when energized; and a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target. The computer executes a detection step of detecting breakage of the light source lamp, and a control step of stopping energization of the light source lamp according to the detection in the detection step. The projection operation in the projection unit is stopped according to the detection in the detection step, and the control step includes a determination step of determining that the light source lamp has been replaced, and the light source lamp of the light source lamp is determined in the determination step. When it is determined that the replacement has been made, the projection operation stop at the projection unit is released, and energization of the light source lamp is started. It is characterized in.

  According to the present invention, even when the lamp of the light source is turned off unexpectedly, the cause can be specified and dealt with.

1 is a block diagram showing a functional configuration of an electronic circuit included in a data projector device according to a first embodiment of the present invention. The flowchart shown about the control processing operation | movement with respect to the light source lamp after the power supply which concerns on the embodiment. The block diagram which shows the function structure of the electronic circuit with which the data projector apparatus which concerns on the 2nd Embodiment of this invention is provided. The flowchart shown about the control processing operation | movement with respect to the light source lamp after the power supply which concerns on the embodiment.

(First embodiment)
A first embodiment in which the present invention is applied to a DLP (Digital Light Processing) (registered trademark) data projector apparatus will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a functional configuration of an electronic circuit included in the data projector device 10 according to the embodiment.
In the figure, reference numeral 11 denotes an input / output connector portion provided on the back side of the main body casing of the data projector apparatus 10 and includes, for example, a pin jack (RCA) type video input terminal, RGB input terminal, and USB terminal.

  Image signals of various standards input from the input / output connector unit 11 include the number of gradations and the like in an image conversion unit 13 that is generally also referred to as a scaler via an input / output interface (I / F) 12 and a system bus SB. After being unified into an image signal of a predetermined format, it is sent to the projection image processing unit 14.

  At this time, the OSD (On Screen Display) mode image and symbols such as a pointer are also sent to the projection image processing unit 14 in a state of being superimposed on the image signal as necessary.

  The projection image processing unit 14 develops and stores the transmitted image signal in the video RAM 15, and then generates a video signal from the stored contents of the video RAM 15.

  The projection image processing unit 14 performs spatial light modulation element by faster time-division driving that multiplies the frame rate of the video signal, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations. For example, the micromirror element 16 which is (SOM) is driven to display.

  On the other hand, a light source lamp 18 using, for example, an ultra-high pressure mercury lamp disposed in the reflector 17 emits white light with high luminance. The white light emitted from the light source lamp 18 is colored into primary colors in a time-sharing manner through the color wheel 19, and is converted into a luminous flux having a uniform luminance distribution by the integrator 20, then totally reflected by the mirror 21 and reflected on the micromirror element 16. Irradiated.

  Then, an optical image is formed by the reflected light from the micromirror element 16, and the formed optical image is projected and displayed via a projection lens unit 22 on a screen (not shown) to be projected.

  As described above, the projection lens unit 22 enlarges and projects the optical image formed by the micromirror element 16 onto a target such as a screen, and the focus position and the zoom position (projection angle of view) can be arbitrarily changed. Shall.

  That is, among a plurality of optical lenses constituting the projection lens unit 22, both a focus lens and a zoom lens (not shown) are controlled by moving back and forth along the optical axis direction. These lenses are stepping motors (M). It moves by the rotational drive of 23.

  A motor (M) 24 that rotates the color wheel 19 is provided.

  However, the projection light processing unit 25 executes lighting driving of the light source lamp 18, rotation driving of the motor 24 for the color wheel 19, and rotation driving of the stepping motor 23 for the projection lens unit 22.

  In addition, the projection light processing unit 25 is attached to the reflector 17 to detect temperature data from the temperature sensor 26 that detects the temperature of the light source lamp 18, and is also attached to the opening of the reflector 17 to generate sound generated in the reflector 17. The voice data from the microphone 27 for picking up the sound is input.

  The CPU 28 controls all the operations of the above circuits. The CPU 28 uses a main memory 29 composed of SDRAM (synchronous DRAM), and a program memory 30 composed of an electrically rewritable nonvolatile memory storing operation programs, various fixed data, and the like in the data projector apparatus 10. The control operation is executed.

  The CPU 28 performs various projection operations according to operation signals from the operation unit 31. The operation unit 31 includes a key operation unit and an infrared reception unit that receives an infrared modulation signal from a remote controller (not shown) dedicated to the data projector device 10, and is operated by a user directly or via the remote controller. Is directly output to the CPU 28.

  The CPU 28 is further connected to the indicator unit 32 and the audio processing unit 33 via the system bus SB.

  The indicator unit 32 displays on / off of the power source, temperature abnormality of the light source lamp 18 and the like by lighting and blinking of LEDs (light emitting diodes) such as green and red, respectively.

  The sound processing unit 33 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker unit 34 to emit a loud sound, or generates a beep sound or the like if necessary.

Next, the operation of the above embodiment will be described.
The main memory 29 is provided with a lamp burst flag register in which a flag “1” is set when a burst of the light source lamp 18 is detected. The contents of the lamp burst flag register are set by the CPU 28. When the power is turned off, the contents of the lamp burst flag register are transferred and held in the program memory 30 which is a non-volatile memory. By reading the contents and setting them again in the main memory 29, the contents are held regardless of whether the power is on or off unless the CPU 28 releases the set state.

  FIG. 2 shows a processing operation related to the light source lamp 18 immediately after the power switch is turned on to the normal projection operation until the power switch is turned off. The operation program stored in the memory 30 is read and executed while being expanded in the main memory 29.

  At the beginning of the process of turning on the power, it is first determined whether or not the flag “1” is set in the lamp burst flag register that is read from the program memory 30 to the main memory 29 and held (step S101).

Here, if it is determined that the flag “1” is set, the light source lamp 18 remains ruptured at the previous power-off, so that an error message indicating that, for example, a voice processing unit From speaker unit 34 using 33
"Replace the lamp
Please press the reset button after replacement. ''
A voice guide message like this is made to be emitted (step S102). At this time, it is also possible to notify the user that some abnormality has occurred in the light source lamp 18 by blinking the LED lamp that notifies the abnormality of the light source lamp 18 in the indicator unit 32.

  In addition, a reset button disposed separately from the key operation unit operated during normal projection operation in the vicinity of the mounting portion of the light source lamp 18 to be replaced and a predetermined operation associated therewith, for example, the light source lamp 18 replaced in units. Whether or not an operation for resetting the operation lamp burst flag register for resetting the lamp burst flag register has been performed is determined based on whether or not the operation has been performed (step S103).

  Here, when the reset operation of the lamp burst flag register is not performed, the process returns to step S102 again, and the error message notification is continued. Thereafter, the processes of steps S102 and S103 are repeatedly executed to wait for the replacement of the light source lamp 18 and the reset operation associated therewith.

  When the user performs a reset operation of the lamp rupture flag register, this is determined in step S103, and the flag “1” set in the lamp rupture flag register is reset according to the operation, and the contents are set to “0”. ".

  Of course, if it is determined in step S101 that the flag “1” is not set in the lamp burst flag register, the processes in steps S102 to S104 are omitted and not executed.

  Thereafter, the light source lamp 18 is turned on again by the projection light processing unit 25 (step S105), and the process proceeds to a normal activation process (step S106).

  Thereafter, when executing a normal projection operation, the state of the light source lamp 18 is simultaneously detected by sound from the microphone 27 (step S107), and whether or not the light source lamp 18 has burst is specifically obtained by the microphone 27. Judgment is made based on whether or not the sound pressure of the sound signal exceeds a predetermined threshold (step S108).

  When it is determined that the sound pressure of the sound signal from the microphone 27 does not exceed a predetermined threshold value and the light source lamp 18 is not ruptured, the operation unit 31 further performs a key operation to turn off the power switch. It is determined whether or not (step S109).

  If it is determined that no key operation is performed to turn off the power here, it is assumed that no problem has occurred, and the projection system including the micromirror element 16 and the projection lens unit 22 continues normal projection operation. The process returns to step S107.

  By repeatedly executing the processes of steps S107 to S109 in this way, the apparatus waits for the light source lamp 18 to rupture or to perform a key operation to turn off the power supply while continuing the normal projection operation.

  However, if the light source lamp 18 is ruptured, it is determined in step S108, and after the flag "1" is set in the lamp rupture flag register of the main memory 29 (step S110), the specified power-off is accompanied. Various standard processes are executed (step S111), and the process shown in FIG.

  The various routine processes associated with the power-off include a process of transferring and holding the contents of the lamp burst flag register of the main memory 29 to the program memory 30 which is a nonvolatile memory as described above.

  If it is determined in step S109 that the key operation for turning off the power switch has been performed on the operation unit 31, the process proceeds to step S111 as it is, and various routine processes associated with the prescribed power off are executed. The process shown in FIG.

  As described above, according to the present embodiment, since the burst of the light source lamp 18 is constantly monitored when the data projector device 10 is turned on, the light source lamp 18 bursts and is unexpected from the original projection operation. When the light is turned off, it is possible to identify the cause and deal with it.

  In addition, when the burst of the light source lamp 18 is detected, the flag “1” is set in the lamp burst flag register in the main memory 29, and the contents of the flag register are transferred to the program memory 30 even when the power is turned off. Therefore, information indicating that the light source lamp 18 is in a ruptured state is maintained even after the apparatus is turned off, and the light source lamp 18 is inadvertently started to energize when the power is turned on again. Can be surely avoided.

  Further, since the flag set in the lamp burst flag register is released by a dedicated reset key operated when the light source lamp 18 is replaced, normal operation after confirming the replacement of the light source lamp 18 is performed. It can be safely transferred.

In the above embodiment, as a means for detecting the burst of the light source lamp 18, the microphone 27 that collects the sound in the range including the light source lamp 18 in the reflector 17 is provided, and the sound obtained by the microphone 27 is provided. Judgment was made based on whether or not the sound pressure of the signal exceeded a predetermined threshold value.
Thereby, it is possible to accurately determine the breakage of the light source lamp 18 with a relatively simple structure by eliminating the influence of the heat of the light source lamp 18 that becomes high heat.

  In this type of projector apparatus, since the light source lamp has a structure in which high-pressure mercury vapor is enclosed, such as a high-pressure mercury lamp of 100 to 1000 [kPa] and an ultrahigh-pressure mercury lamp of 1000 [kPa] or more, In many cases, the light source lamp has a unit structure in which the entire light source lamp and the reflector are covered with explosion-proof glass. With such a structure, it is difficult to detect a burst sound of the light source lamp from the outside of the unit.

  Therefore, in the case of adopting the above unit structure, the microphone 27 also has an integral structure for detecting sound in the sealed space in the unit, and the microphone 27 is also exchanged unit by unit, or the outside of the unit. It is necessary to form a through-hole for attaching the microphone 27 in a part of the explosion-proof glass.

  In the above embodiment, it has been described that the breakage of the light source lamp 18 is detected by sound using the microphone 27. However, when the light source lamp 18 bursts, not only the sound but also the pressure temporarily fluctuates greatly. Therefore, a pressure sensor may be used in place of the microphone 27.

  Thus, even when the pressure sensor detects the breakage (rupture) of the light source lamp 18, it is a relatively simple structure and accurately eliminates the influence of the heat of the light source lamp 18 that becomes hot. It is possible to determine whether the lamp 18 is broken.

  Even when this pressure sensor is used, it is difficult to detect the burst sound of the light source lamp from the outside of the unit in the unit structure in which the light source lamp is covered with the explosion-proof glass as described above. An integrated structure is adopted to detect the pressure in the enclosed space, and the pressure sensor is replaced with a unit unit, or a through hole for attaching the pressure sensor is formed in a part of the explosion-proof glass outside the unit. There is a need.

(Second Embodiment)
A second embodiment when the present invention is applied to a DLP (registered trademark) data projector apparatus will be described below with reference to the drawings.

  FIG. 3 is a block diagram showing a functional configuration of an electronic circuit included in the data projector apparatus 10 ′ according to the embodiment. In this figure, the basic configuration itself relating to the projection of the image is the same as that of the data projector apparatus 10 shown in FIG. 1, and therefore, the same parts are denoted by the same reference numerals and description thereof is omitted.

  Furthermore, it is assumed that an optical lens 41 and an image sensor 42 are provided in place of the microphone 27 in FIG. 1 so that an image of the light source lamp 18 in the reflector 17 can be taken. The image signal obtained by the image sensor 42 is digitized by the process circuit 43 and then subjected to processing such as contour enhancement, and then sent to the CPU 28 via the system bus SB.

  In the program memory 30, in addition to the data of the operation program executed by the CPU 28, a reference image similar to the light source lamp 18 in the reflector 17 photographed by the image sensor 42 is stored in advance. By comparing the obtained actual image with the reference image stored in the program memory 30, it is determined whether the light source lamp 18 is damaged (exploded).

  Further, an LED lamp 44 is provided to illuminate the light source lamp 18 in the reflector 17. The LED lamp 44 is composed of, for example, a high-intensity white LED, and illuminates the light source lamp 18 in the reflector 17 by driving the projection light processing unit 25.

Next, the operation of the above embodiment will be described.
The main memory 29 is provided with a lamp burst flag register in which a flag “1” is set when a burst of the light source lamp 18 is detected. The contents of the lamp burst flag register are set by the CPU 28. When the power is turned off, the contents of the lamp burst flag register are transferred and held in the program memory 30 which is a non-volatile memory. By reading the contents and setting them again in the main memory 29, the contents are held regardless of whether the power is on or off unless the CPU 28 releases the set state.

  FIG. 4 shows a processing operation related to the light source lamp 18 immediately after the power switch is turned on to the normal projection operation until the power switch is turned off. The operation program stored in the memory 30 is read and executed while being expanded in the main memory 29.

  At the beginning of the process when the power is turned on, it is first determined whether or not the flag “1” is set in the lamp burst flag register that is read from the program memory 30 to the main memory 29 (step S301).

Here, if it is determined that the flag “1” is set, the light source lamp 18 remains ruptured at the previous power-off, so that an error message indicating that, for example, a voice processing unit From speaker unit 34 using 33
"Replace the lamp
Please press the reset button after replacement. ''
A voice guide message like the above is emitted (step S302). At this time, it is also possible to notify the user that some abnormality has occurred in the light source lamp 18 by blinking the LED lamp that notifies the abnormality of the light source lamp 18 in the indicator unit 32.

  In addition, a reset button disposed separately from the key operation unit operated during normal projection operation in the vicinity of the mounting portion of the light source lamp 18 to be replaced and a predetermined operation associated therewith, for example, the light source lamp 18 replaced in units. Whether or not an operation for resetting the operation lamp burst flag register for resetting the lamp burst flag register has been performed is determined based on whether or not the operation has been performed (step S303).

  Here, when the reset operation of the lamp burst flag register is not performed, the process returns to step S302 again, and the error message notification is continued. Thereafter, the processes of steps S302 and S303 are repeatedly executed to wait for the replacement of the light source lamp 18 and the reset operation associated therewith.

  Then, when the user performs a reset operation of the lamp rupture flag register, this is determined in step S303, and the flag “1” set in the lamp rupture flag register is reset according to the operation, and the contents are set to “0”. ".

  Of course, if it is determined in step S301 that the flag “1” is not set in the lamp burst flag register, the processes in steps S302 to S304 are omitted and not executed.

  Thereafter, the light source lamp 18 is driven to turn on again by the projection light processing unit 25 (step S305), and the LED lamp 44 is also driven to turn on (step S306). Then, the process proceeds to normal startup processing (step S307).

  Thereafter, when executing the normal projection operation, the state of the light source lamp 18 is simultaneously photographed by the image sensor 42 (step S308), and the image data obtained by the photographing and the reference image of the light source lamp 18 stored in advance in the program memory 30 are taken. By comparing the data with the pattern matching process, it is determined whether or not the light source lamp 18 has exploded (step S309).

  If it is determined that the image data obtained by photographing is substantially equivalent to the reference image data and the light source lamp 18 is not ruptured, it is further determined whether or not a key operation for turning off the power switch is performed on the operation unit 31. (Step S310).

  If it is determined that no key operation is performed to turn off the power here, it is assumed that no problem has occurred, and the projection system including the micromirror element 16 and the projection lens unit 22 continues normal projection operation. The process returns to step S308.

  By repeatedly executing the processes of steps S308 to S310 in this way, the apparatus waits for the light source lamp 18 to burst or a key operation to turn off the power to be performed while continuing the normal projection operation.

  However, if the light source lamp 18 is ruptured, this is determined in step S309, and after setting the flag "1" in the lamp rupture flag register of the main memory 29 again (step S311), the specified power-off is accompanied. Various fixed processes are executed (step S312), and the process shown in FIG. 4 is completed.

  The various routine processes associated with the power-off include a process of transferring and holding the contents of the lamp burst flag register of the main memory 29 to the program memory 30 which is a nonvolatile memory as described above.

  If it is determined in step S310 that the key operation for turning off the power switch has been performed on the operation unit 31, the process proceeds to step S312 as it is, and various routine processes associated with the prescribed power off are executed. The process shown in FIG. 4 ends.

  As described above, according to the present embodiment, since the burst of the light source lamp 18 is constantly monitored by the image of the light source lamp 18 when the data projector device 10 is turned on, the light source lamp 18 bursts and the original projection is performed. From the operation, when the light is turned off unexpectedly, the cause can be identified and dealt with.

  In particular, in this type of projector apparatus, since the light source lamp has a structure in which high-pressure mercury vapor is enclosed, such as a high-pressure mercury lamp of 100 to 1000 [kPa] and an ultrahigh-pressure mercury lamp of 1000 [kPa] or more, In many cases, the light source lamp has a unit structure in which the entire light source lamp and the reflector are covered with explosion-proof glass. With such a structure, it is difficult to detect a change in sound and pressure due to the burst of the light source lamp from the outside of the unit.

  However, in the present embodiment, the image of the light source lamp 18 is taken by the image sensor and the breakage (rupture) of the light source lamp 18 is detected from the contents thereof. Therefore, the breakage of the light source lamp 18 is reliably determined even from outside the unit. can do.

  In each of the above embodiments, the case where the present invention is applied to a DLP (registered trademark) type data projector apparatus has been described. However, a structure is formed if the projector uses a discharge lamp as a light source lamp. Therefore, the present invention can be similarly applied to various other apparatuses such as a liquid crystal projector using a transmissive liquid crystal panel, a rear projection television apparatus, and an overhead projector (OHP).

  In addition, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the functions executed in the above-described embodiments may be implemented in appropriate combination as much as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination according to a plurality of disclosed structural requirements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the embodiment, if an effect is obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

  DESCRIPTION OF SYMBOLS 10,10 '... Data projector apparatus, 11 ... Input / output connector part, 12 ... Input / output interface (I / F), 13 ... Image conversion part, 14 ... Projection image processing part, 15 ... Video RAM, 16 ... Micromirror element (SOM), 17 ... reflector, 18 ... light source lamp, 19 ... color wheel, 20 ... integrator, 21 ... mirror, 22 ... projection lens unit, 23 ... stepping motor (M), 24 ... motor (M), 25 ... projection Optical processing unit, 26 ... temperature sensor, 27 ... microphone, 28 ... CPU, 29 ... main memory, 30 ... program memory, 31 ... operation unit, 32 ... indicator unit, 33 ... audio processing unit, 34 ... speaker, 41 ... optical Lens, 42 ... Image sensor, 43 ... Process circuit, 44 ... LED lamp, SB ... System bus.

The invention according to claim 1 is a projection apparatus, comprising: a light source lamp that emits light when energized; a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target; and the light source. Detection means for detecting breakage of the lamp, holding means for holding the detection result of the detection means when the apparatus is turned off, and the detection held by the holding means prior to energization of the light source lamp when the power is turned on Referring to the results, characterized by comprising a control means for controlling the energization to the light source lamp based on the detection result.

According to a second aspect of the present invention, in the first aspect of the invention, when the detection result held by the holding means indicates that the light source lamp is broken, the control means applies the light to the light source lamp. It is characterized by stopping energization .
According to a third aspect of the present invention, in the first or second aspect of the present invention, the control means includes determination means for determining that the light source lamp has been replaced, and the control means includes the holding means. In the case where the detection result held in FIG. 4 indicates that the light source lamp is broken, the power supply to the light source lamp is stopped until the determination means determines that the light source lamp has been replaced. And
According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects of the present invention, when the detection result held by the holding means indicates that the light source lamp is broken, When the determination means determines that the light source lamp has been replaced, the stop of energization of the light source lamp is released.
According to a fifth aspect of the present invention, in the invention according to any one of the first to fourth aspects, the control means stops the projection operation by the projection means in accordance with the detection by the detection means.

The invention according to claim 6 is the invention according to any one of claims 1 to 5, wherein the detection means includes:
The image processing apparatus includes an image capturing unit that captures an image of the light source lamp, and a determination unit that determines whether the light source lamp is damaged from an image signal obtained by the image capturing unit.
The invention according to claim 7 is the invention according to claim 6 , wherein the determination means compares the image data of the image signal with reference image data of a light source lamp stored in advance by pattern matching processing. It is determined whether the light source lamp is damaged or not.
The invention according to claim 8 is the invention according to any one of claims 1 to 7, wherein the detection means is obtained by sound collection means for collecting sound in a region including the light source lamp, and the sound collection means. And determining means for determining whether or not the sound pressure of the audio signal exceeds a predetermined threshold value.

The invention according to claim 9 is the invention according to any one of claims 1 to 8, wherein the detection means is a pressure detection means for detecting a pressure in a region including the light source lamp, and a pressure obtained by the pressure detection means. And determining means for determining whether or not the signal exceeds a predetermined threshold value.

The invention of claim 10 wherein the light source lamp that emits light by passing electricity, using the light emitted from the light source lamp to form an optical image, a projection control method of a projection device and a projection unit for emitting toward the projection target A detection step for detecting breakage of the light source lamp, a holding step for holding a detection result in the detection step when the apparatus is turned off, and a holding step prior to energization of the light source lamp when the power is turned on. Referring to have been the result of detection held in, characterized by being perforated and a control step of controlling the power supply to the light source lamp based on the detection result.

According to an eleventh aspect of the present invention, there is provided a computer built in a projection apparatus comprising: a light source lamp that emits light when energized; and a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target. A detection step for detecting breakage of the light source lamp, a holding step for holding the detection result in the detection step when the apparatus is turned off, and energizing the light source lamp when the power is turned on. , Referring to the detection result held in the holding step, and causing a computer to execute a control step of controlling energization to the light source lamp based on the detection result .

Claims (8)

A light source lamp that emits light when energized;
A projection means for forming a light image using light emitted from the light source lamp and emitting the light image toward a projection target;
Detection means for detecting breakage of the light source lamp;
Control means for stopping energization of the light source lamp according to detection by the detection means,
The control means stops the projection operation by the projection means according to the detection by the detection means,
The control means has a determination means for determining that the light source lamp has been replaced, and stops the projection operation at the projection means when the determination means determines that the light source lamp has been replaced. Is released, and energization of the light source lamp is started.   The projection apparatus according to claim 1, further comprising holding means for holding a detection result of the detection means when the apparatus is turned off. The detecting means is
Photographing means for photographing the light source lamp;
3. The projection apparatus according to claim 1, further comprising a determination unit that determines whether or not the light source lamp is damaged from an image signal obtained by the photographing unit. The determination means determines whether or not the light source lamp is damaged by comparing the image data of the image signal with reference image data of the light source lamp stored in advance by pattern matching processing. The projection apparatus according to claim 3, wherein: The detecting means is
Sound collecting means for collecting sound in a region including the light source lamp;
The projection apparatus according to claim 1, further comprising: a determination unit that determines whether or not a sound pressure of the audio signal obtained by the sound collection unit exceeds a predetermined threshold value. The detecting means is
Pressure detecting means for detecting the pressure in the region including the light source lamp;
The projection apparatus according to claim 1, further comprising a determination unit that determines whether or not a pressure signal obtained by the pressure detection unit exceeds a predetermined threshold value. A projection control method for a projection apparatus, comprising: a light source lamp that emits light by energization; and a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target,
A detection step of detecting breakage of the light source lamp;
A control step of stopping energization of the light source lamp according to the detection in the detection step,
The control step stops the projection operation in the projection unit according to the detection in the detection step,
The control step includes a determination step of determining that the light source lamp has been replaced, and stops the projection operation at the projection unit when it is determined in the determination step that the light source lamp has been replaced. The projection control method is characterized in that energization of the light source lamp is started by canceling. A program executed by a computer built in a projection apparatus having a light source lamp that emits light by energization and a projection unit that forms a light image using light emitted from the light source lamp and emits the light toward a projection target,
A detection step of detecting breakage of the light source lamp;
And causing the computer to execute a control step of stopping energization of the light source lamp according to the detection in the detection step,
The control step stops the projection operation in the projection unit according to the detection in the detection step,
The control step includes a determination step of determining that the light source lamp has been replaced, and stopping the projection operation at the projection unit when the determination step determines that the light source lamp has been replaced. Is released, and energization of the light source lamp is started.

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