JP2008180837A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector which detects vibration from the outside and performs predetermined safety operation according to a result of detection. <P>SOLUTION: The projector 24 for projecting a video to a body to be projected (screen) is equipped with an acceleration detector 1 for detecting vibration such as acceleration (shock or earthquake), and a safety function part (power source control part 3) automatically started to perform the predetermined safety operation according to a result of detection by the acceleration detector 1. The power source control part 3 detects the vibration from the outside, and the projector performs the predetermined safety operation such as putting the power source of a power source part 4 in a standby state according to a result of the detection. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projector, and more particularly to a projector that performs control based on a result of detecting external vibration.

  As shown in FIG. 15, in the past, the image 21 projected from the projector 24 tilted at the projection angle 23 has a problem that the image is distorted into a trapezoid compared to the image 22 projected without an angle. .

  To correct this problem, the image projected from the projector 24 is distorted into a trapezoid opposite to the projected trapezoid image so that the image is a normal square image (keystone correction). ). This keystone correction is manually adjusted by the user, but the projector 24 includes an acceleration detector that detects displacement and acceleration, and modulates light by detecting the gravity applied to the projector 24 and the projection angle 23. A trapezoidally distorted image displayed on an element (for example, a liquid crystal panel or DMD chip) can be automatically corrected to a normal square image.

  In such a conventional projector, the acceleration detector is provided for measuring the displacement of the projector and performing keystone correction, and measurement of acceleration such as vibration and impact on the projector has not been performed. For example, as a method of preventing the risk of smoke emission from the projector due to vibration or impact such as an earthquake, turn off the power of the projector on the projector main body or instruction manual, or `` If an abnormality occurs, It was necessary for the user to turn off the power by making a note saying “Unplug the power plug immediately!”.

  However, with such a method, a user who cannot read the notice (for example, a child or an infant), a user who has failed to read the notice (for example, a viewer or a handler), or a projector in a public place For viewers watching video releases (for example, movies) using, and users who were not in a normal state at the time of the earthquake (for example, viewers and handlers) There is a possibility of forgetting to turn off the projector, which may lead to fire or electric shock. Even when the projector is designed to be earthquake-resistant, there is a possibility that these people may escape late because a clear evacuation passage is not instructed to viewers and users.

  As a countermeasure for conventional projectors in the event of an earthquake as described above, there is one that receives disaster occurrence information sent from the outside via a communication line and displays an evacuation passage by the projector (for example, patents) Reference 1). In addition, there is a case in which an alarm notification signal is received by wireless communication using radio waves of a predetermined frequency and is notified to the user by means of light emission, sound generation, vibration, and the like (see, for example, Patent Document 2). There is a method in which a system that transmits data measured by a provided seismometer to a disaster prevention center or the like by radio waves is used for an advertising medium transmission system using a projector (see, for example, Patent Document 3).

JP 2004-329390 A JP 2006-135789 A JP 2001-331138 A

  However, the conventional projectors described in Patent Document 1 and Patent Document 2 do not include a means for detecting an earthquake, and therefore cannot notify the occurrence of an earthquake only with the projector. The projector described in Patent Document 3 includes means for detecting an earthquake. However, since the detected signal is transmitted to the outside, the occurrence of the earthquake cannot be notified only by the projector.

  The present invention has been made to solve such a problem, and an object thereof is to provide a projector that detects external vibration and performs a predetermined safe operation in accordance with the detection result.

  In order to solve the above problems, a projector according to the present invention is a projector that projects an image on a projection target, and automatically starts according to an acceleration detector that detects vibration and a detection result by the acceleration detector. And a safety function unit for executing a predetermined safety operation.

  The present invention includes an acceleration detector that detects vibration and a safety function unit that is automatically activated in accordance with a detection result by the acceleration detector and executes a predetermined safety operation. Therefore, it is possible to provide a projector that detects vibration from the outside and executes a predetermined safe operation according to the detection result.

  Embodiments of the present invention will be described below with reference to the drawings.

<Embodiment 1>
FIG. 1 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to Embodiment 1 of the present invention. As shown in FIG. 1, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The power supply control unit 3 includes a safety function unit that is automatically activated in accordance with the detection result of the acceleration detector 1 and executes a predetermined safety operation. The voltage input from the filter 2 is periodically received. The power supply unit 4 is controlled by measuring and transmitting a control signal to the power supply unit 4 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, the power supply unit 4 is in the ON state. If the input voltage is outside the set voltage range, the power supply unit 4 is controlled to be in a standby state. The power supply unit 4 is provided to supply power to the electric circuit.

  As shown in FIG. 16, each of the acceleration detector 1, the filter 2, the power supply control unit 3, and the power supply unit 4 is provided inside the projector, and can operate without any problem as long as it is placed inside the projector. Therefore, it is possible to arrange all of them together on the same substrate as the power supply control unit 3. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 2 is a flowchart of operation processing in the projector according to the first embodiment of the present invention. The symbols shown in FIG. 2 will be described below. V0 is a voltage that is output through the filter 2 according to the vibration applied to the acceleration detector 1 from the outside, and V1 is guaranteed from malfunction, failure, or destruction of the projector even if vibration is applied to the projector from the outside. Voltage V0. T0 is the time required for the entire process, and is set to 0 as an initial setting when power is supplied to the projector. T1 is a time interval for measuring the voltage V0 output from the filter 2.

  Next, the overall operation process of the first embodiment of the present invention will be described.

  In step S100, power is supplied to the projector and processing is started.

  In step S101, initial setting of T0 = 0 is performed in the power supply control unit 3, and the process proceeds to step S102.

  In step S102, the power supply control unit 3 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S102, the process proceeds to step S103 and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S102, the process proceeds to step S104.

  In step S104, the power supply control unit 3 sets T0 = 0. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S105.

  In step S105, the power supply control unit 3 measures V0. Thereafter, the measured V0 and V1 are compared, and if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S102. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step S106.

  In step S106, a control signal is transmitted from the power supply control unit 3 to the power supply unit 4 so that the power supply unit 4 enters a standby state, and the process proceeds to step S107.

  In step S107, the power supply unit 4 receives the control signal transmitted from the power supply control unit 3 and enters a standby state. And a process is complete | finished by step S108.

  From the above, the power supply control unit 3 executes a safe operation for controlling the power supply unit 4 to the standby state according to the detection result by the acceleration detector 1, thereby preventing the user (viewer and viewer) from danger such as fire or electric shock. It is possible to protect the handler.

<Embodiment 2>
FIG. 3 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to the second embodiment of the present invention. As shown in FIG. 3, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The lamp power supply control unit 5 is provided with a safety function unit that is automatically activated according to the detection result of the acceleration detector 1 and executes a predetermined safety operation. The lamp power supply unit 6 is controlled by transmitting a control signal to the lamp power supply unit 6 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, power is supplied to the lamp power source 6 and the light source lamp 7 is turned on. On the other hand, when the input voltage is outside the set voltage range, the power supply to the lamp power supply unit 6 is cut off and the light source lamp 7 is turned off. The lamp power supply unit 6 is provided to supply power to the light source lamp 7. The light source lamp 7 is a light source of the projector and is supplied with electric power from the lamp power source 6.

  Each of the acceleration detector 1, the filter 2, the lamp power control unit 5, the lamp power supply unit 6, and the light source lamp 7 is provided inside the projector, and can operate without any problem as long as it is placed inside the projector. Therefore, it is possible to arrange them all together on the same substrate as the lamp power supply control unit 5. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 4 is a flowchart of operation processing in the projector according to the second embodiment of the present invention. The description of the symbols shown in FIG. 4 is the same as the description in the first embodiment, and is omitted here.

  Next, the overall operation process of the second embodiment of the present invention will be described.

  In step S200, power is supplied to the projector to start processing.

  In step S201, initial setting of T0 = 0 is performed in the lamp power supply controller 5, and the process proceeds to step S202.

  In step S202, the lamp power control unit 5 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S202, the process proceeds to step S203 and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S202, the process proceeds to step S204.

  In step S204, T0 = 0 is set in the lamp power supply control unit 5. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S205.

  In step S205, the lamp power supply controller 5 measures V0. Thereafter, the measured V0 and V1 are compared, and if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S202. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step S206.

  In step S206, a control signal is transmitted from the lamp power supply control unit 5 to the lamp power supply unit 6 so that the lamp power supply unit 6 is turned off, and the process proceeds to step S207.

  In step S207, the lamp power supply unit 6 receives the control signal transmitted from the lamp power supply control unit 5 and enters a disconnected state. As a result, the power supplied to the light source lamp 7 is cut off. In step S208, the light source lamp 7 is turned off, and the process ends in step S209.

  From the above, the lamp power control unit 5 executes a safe operation for controlling the lamp power supply unit 6 to be cut off according to the detection result by the acceleration detector 1, so that the user ( Viewers and handlers) can be protected.

<Embodiment 3>
FIG. 5 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to the third embodiment of the present invention. As shown in FIG. 5, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The power supply control unit A8 is provided with a safety function unit that is automatically activated in accordance with the detection result of the acceleration detector 1 and executes a predetermined safety operation. The voltage input from the filter 2 is periodically supplied. The power supply unit A9 is controlled by measuring and transmitting a control signal to the power supply unit A9 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, the power supply unit A9 is in the ON state, and if the input voltage is outside the set voltage range, the power supply unit A9 is controlled to the standby state. The power supply unit A9 is provided to supply power to the electric circuit.

  Note that each of the acceleration detector 1, the filter 2, the power supply control unit A8, and the power supply unit A9 is provided inside the projector and operates without any problem anywhere within the projector. Can be all placed together in the same substrate. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 6 is a flowchart of operation processing in the projector according to the third embodiment of the present invention. Description of the symbols shown in FIG. 6 is omitted here because it is the same as the description in the first embodiment.

  Next, the overall operation process of the third embodiment of the present invention will be described.

  In step S300, power is supplied to the projector and processing is started.

  In step S301, initial setting of T0 = 0 is performed in the power supply controller A8, and the process proceeds to step S302.

  In step S302, power supply control unit A8 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S302, the process proceeds to step S303 and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S302, the process proceeds to step S304.

  In step S304, T0 = 0 is set in the power supply controller A8. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S305.

  In step S305, the power supply control unit A8 measures V0. Thereafter, the measured V0 and V1 are compared, and if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S302. On the other hand, if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S306.

  In step S306, a control signal is transmitted from the power supply control unit A8 to the power supply unit A9 so that the power supply unit A9 is turned off, and the process proceeds to step S307.

  In step S307, the power supply unit A9 receives the control signal transmitted from the power supply control unit A8 and enters a disconnected state.

  In step S308, the power supplied to each circuit including the power supply control unit A8 is cut off. And a process is complete | finished by step S309.

  From the above, the power supply control unit A8 executes the safe operation of controlling the power supply unit A9 to be in a disconnected state according to the detection result by the acceleration detector 1, thereby preventing the user (viewer and viewer) from danger such as fire or electric shock. It is possible to protect the handler.

<Embodiment 4>
FIG. 7 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to the fourth embodiment of the present invention. As shown in FIG. 7, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The image control unit 10 includes a safety function unit that is automatically activated according to the detection result of the acceleration detector 1 and executes a predetermined safety operation. The voltage input from the filter 2 is periodically received. The image display unit 11 is controlled by measuring and transmitting a control signal to the image display unit 11 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, PICTURE_A that is image data of the video signal from the outside of the projector is sent to the image display unit 11. On the other hand, when the input voltage is outside the set voltage range, the registered image data PICTURE_B (evacuation passage guidance display, display notifying that an earthquake has occurred, display notifying that an impact has been applied) is displayed on the image display unit 11. Send to. The image display unit 11 is provided for projecting and displaying an image on a screen which is a projection target.

  Note that each of the acceleration detector 1, the filter 2, and the image control unit 10 is provided inside the projector and operates without any problem anywhere within the projector. It is possible to put everything together. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 8 is a flowchart of operation processing in the projector according to the fourth embodiment of the present invention. The symbols shown in FIG. 8 will be described. V0, V1, T0, and T1 are the same as those described in the first embodiment. PICTURE_A is image data of a video signal from the outside of the projector that is input to the image control unit 10, and PICTURE_B is registered image data.

  Next, an overall operation process according to the fourth embodiment of the present invention will be described.

  In step S400, power is supplied to the projector to start processing.

  In step S401, initial setting of T0 = 0 is performed in the image control unit 10, and the process proceeds to step S402.

  In step S <b> 402, the image control unit 10 sends PICTURE_A that is image data to the image display unit 11.

  In step S403, the image display unit 11 projects PICTURE_A input from the image control unit 10 on the screen, and the process proceeds to step S404.

  In step S404, the image control unit 10 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S404, the process proceeds to step S405, and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S404, the process proceeds to step S406.

  In step S406, the image control unit 10 sets T0 = 0. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S407.

  In step S407, the image control unit 10 measures V0. Thereafter, the measured V0 and V1 are compared. If V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S404. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step S408.

  In step S <b> 408, the image control unit 10 sends the image data of PICTURE_B to the image display unit 11 instead of PICTURE_A.

  In step S409, the image display unit 11 projects PICTURE_B received from the image control unit 10 on the screen, and the process ends in step S410.

  As described above, the image display unit 11 displays the registered image data (evacuation path guidance display, display notifying that an earthquake has occurred, display notifying that an impact has been applied, etc.) according to the detection result by the acceleration detector 1. When the image display unit 10 executes a safe operation for controlling to display the image, for example, a spectator watching a video release (movie, etc.) by using a projector in a public place, and a normal time when an earthquake occurs For users who are not in a state (viewers, handlers, etc.), a clear evacuation passage instruction is given to assist evacuation.

<Embodiment 5>
FIG. 9 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to the fifth embodiment of the present invention. As shown in FIG. 9, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The image control unit A12 is provided with a safety function unit that is automatically activated according to the detection result of the acceleration detector 1 and executes a predetermined safety operation. The voltage input from the filter 2 is periodically received. The image display unit A13 is controlled by measuring and transmitting a control signal to the image display unit A13 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, PICTURE_C14 which is image data of the video signal from the outside of the projector is sent to the image display unit A13. On the other hand, when the input voltage is outside the set voltage range, PICTURE_D15 (television early warning of television broadcast, image set by the user), which is predetermined image data input from the outside of the projector, is transmitted to the image display unit A13. The image display unit A13 is provided for projecting and displaying an image on a screen.

  Note that each of the acceleration detector 1, the filter 2, and the image control unit A12 is provided inside the projector and operates without any problem as long as it is placed inside the projector. It is possible to put everything together. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 10 is a flowchart of operation processing in the projector according to the fifth embodiment of the present invention. The symbols shown in FIG. 10 will be described. V0, V1, T0, and T1 are the same as those described in the first embodiment. PICTURE_C is image data of a video signal from the outside of the projector that is input to the image control unit A12, and PICTURE_D is predetermined image data that is input from the outside.

  Next, the overall operation process of the fifth embodiment of the present invention will be described.

  In step S500, power is supplied to the projector to start processing.

  In step S501, the image control unit A12 performs initial setting of T0 = 0, and the process proceeds to step S502.

  In step S502, the image control unit A12 sends PICTURE_C14 that is image data to the image display unit A13.

  In step S503, the image display unit A13 projects PICTURE_C14 input from the image control unit A12 on the screen, and the process proceeds to step S504.

  In step S504, the image control unit A12 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S504, the process proceeds to step S505, and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S504, the process proceeds to step S506.

  In step S506, the image control unit A12 sets T0 = 0. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S507.

  In step S507, the image control unit A12 measures V0. Then, the measured V0 and V1 are compared, and if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S504. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step S508.

  In step S508, the image control unit A12 sends the image data of PICTURE_D15 to the image display unit A13 instead of PICTURE_C14.

  In step S509, the image display unit A13 projects PICTURE_D15 received from the image control unit A12 on the screen, and the process ends in step S510.

  From the above, control is performed so that predetermined image data (television early warning of television broadcast, image set by the user) input from the outside according to the detection result by the acceleration detector 1 is displayed on the image display unit A13. When the image display unit A13 executes the safe operation, for example, a spectator watching a video release (movie, etc.) by using a projector in a public place, and use when the earthquake is not normal For the viewer (viewer, handler, etc.), information can be obtained quickly, which helps evacuation.

<Embodiment 6>
FIG. 11 is a schematic block diagram of a projector according to Embodiment 6 of the present invention. As shown in FIG. 11, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The control unit 16 includes a safety function unit that is automatically activated according to the detection result of the acceleration detector 1 and executes a predetermined safety operation, and periodically measures the voltage input from the filter 2. The product operation display unit 17 is controlled by transmitting a control signal to the product operation display unit 17 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, the product operation display unit 17 displays green indicating that the video data is normally displayed, and if the input voltage is outside the set voltage range, the projector Control is performed to display red flashing (for example, repetition of an operation of turning off for 1 second after turning on for 1 second) indicating that vibration is applied from the outside. The product operation display unit 17 is provided for displaying the operation state of a product (projector or the like).

  Note that each of the acceleration detector 1, the filter 2, the control unit 16, and the product operation display unit 17 is provided inside the projector and operates without any problem anywhere within the projector. Can be all placed together in the same substrate. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  FIG. 12 is a flowchart of operation processing in the projector according to the sixth embodiment of the present invention. The description of the symbols shown in FIG. 12 is the same as the description in Embodiment 1, and is omitted here.

  Next, an overall operation process according to the sixth embodiment of the present invention will be described.

  In step S600, power is supplied to the projector and processing is started.

  In step S601, initial setting of T0 = 0 is performed in the control unit 16, and the process proceeds to step S602.

  In step S602, the control unit 16 sends a control signal to the product operation display unit 17 so as to display green so as to indicate that the video data is normally displayed.

  In step S <b> 603, the product operation display unit 17 displays green according to the control signal received from the control unit 16.

  In step S604, the control unit 16 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S604, the process proceeds to step S605, and the time until the condition is satisfied is added. On the other hand, if the condition is satisfied in step S604, the process proceeds to step S606.

  In step S606, the control unit 16 sets T0 = 0. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S607.

  In step S607, the power supply unit 16 measures V0. Thereafter, the measured V0 and V1 are compared. If V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step 604. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step 608.

  In step S608, instead of green indicating that the video data is normally displayed, red blinking indicating that vibration such as acceleration (impact, earthquake) is applied (for example, lighting for 1 second and then turning off for 1 second) Controls to display (repeat operation).

  In step S609, the product operation display unit 17 receives the control signal transmitted from the control unit 16 and starts blinking red. Then, the process ends at step S610.

  From the above, when the control unit 16 executes a safe operation for controlling the operation display unit 17 to give a warning according to the detection result of the acceleration detector 1, for example, by using a projector in a public place. Information can be obtained quickly for spectators watching video releases (movies, etc.) and for users who are not in a normal state at the time of the earthquake (viewers and handlers), thus helping evacuation. . In addition, it is possible to provide information that allows the user to easily guess the cause of the failure.

<Embodiment 7>
FIG. 13 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to the seventh embodiment of the present invention. As shown in FIG. 13, the acceleration detector 1 outputs to the filter 2 a voltage corresponding to vibrations such as acceleration (impact, earthquake) applied from the outside. The filter 2 removes noise components mixed in the voltage input from the acceleration detector 1. Here, the filter 2 is obtained by digital processing corresponding to an intermediate waveform between the acceleration and speed of the earthquake motion in the frequency range of 0.5 to 10 Hz. The control unit A18 includes a safety function unit that is automatically activated according to the detection result of the acceleration detector 1 and executes a predetermined safety operation, and periodically measures the voltage input from the filter 2. The image display unit B19 is controlled by transmitting a control signal to the image display unit B19 according to the measurement result. At the time of measurement, if the input voltage is within the set voltage range, PICTURE_C that is image data of the video signal from the outside of the projector is sent to the image display unit B19. On the other hand, when the input voltage is outside the set voltage range, PICTURE_D (television early warning of television broadcast, image set by the user), which is predetermined image data input from the outside of the projector, is displayed in the image display unit B19. Or control the power supply unit C20 to a standby state. The power supply unit C20 is provided to supply power to the electric circuit.

  Note that each of the acceleration detector 1, the filter 2, the control unit A18, and the power supply unit C20 is provided inside the projector and operates without any problem as long as it is arranged inside the projector. Therefore, the same substrate as the control unit A18 is used. It is possible to put everything together inside. Further, the acceleration detector 1 may be any device that detects acceleration, such as a piezoelectric type, but there is an acceleration detector that cannot be arranged by arbitrarily setting a direction for detecting acceleration.

  The seventh embodiment of the present invention is characterized in that the user or the like is notified by various methods in accordance with the result of comparison between the voltage input in the control unit A18 and the set value voltage. In the seventh embodiment, as one example, the process of either the first embodiment or the fifth embodiment is performed according to the result determined by the control unit A18. In the seventh embodiment of the present invention, the combination of the first embodiment and the fifth embodiment is described. However, the projector may include a plurality of configurations described in the other embodiments.

  FIG. 14 is a flowchart of operation processing in the projector according to the seventh embodiment of the invention. The symbols shown in FIG. 14 will be described. V0, V1, T0, and T1 are the same as those described in the first embodiment, and PICTURE_C and PICTURE_D are the same as those in the fifth embodiment. V2 is a range of voltage V0 that is guaranteed from malfunction, failure, or destruction of the projector even when vibration is applied to the projector from the outside, but it is wider than V1. That is, the relationship between V1 and V2 is V1 <V2.

  Next, an overall operation process according to the seventh embodiment of the present invention will be described.

  In step S700, power is supplied to the projector to start processing.

  In step S701, initial setting of T0 = 0 is performed in the control unit A18, and the process proceeds to step S702.

  In step S702, the control unit A18 sends PICTURE_C, which is image data, to the image display unit B19.

  In step S703, the image display unit B19 projects PICTURE_C input from the control unit A18 on the screen, and the process proceeds to step S704.

  In step S704, the control unit A18 compares T0 and T1, and determines whether the condition of T0 ≧ T1 is satisfied. If the condition is not satisfied in step S704, the process proceeds to step S705 and time is added until the condition is satisfied. On the other hand, if the condition is satisfied in step S704, the process proceeds to step S706.

  In step S706, T0 = 0 is set in the control unit A18. That is, the time T0 is reset. After setting T0 = 0, the process proceeds to step S707.

  In step S707, the controller A18 measures V0. Thereafter, the measured V0 and V1 are compared, and if V0 is within the voltage range of V1, it is determined that the vibration is small, and the process proceeds to step S704. On the other hand, if V0 is outside the voltage range of V1, it is determined that the vibration is large, and the process proceeds to step S708.

  In step S708, the control unit A18 measures V0 again. Then, the measured V0 and V2 are compared, and if V0 is within the voltage range of V2, the process proceeds to step S712, and if V0 is outside the voltage range of V2, the process proceeds to step S709.

  In step S709, a signal is sent from the control unit A18 so that the power supply unit C20 is in a standby state, the power supply unit C20 is in a standby state in step S710, and the process ends in step S711.

  On the other hand, in step S712, the control unit A18 sends PICTURE_D image data to the image display unit B19 instead of PICTURE_C, and in step S713, the image display unit B19 projects the PICTURE_D image data received from the control unit A18 on the screen. In step S711, the process ends.

  From the above, depending on the detection result by the acceleration detector 1, predetermined image data (television broadcast earthquake warning, image set by the user) input from the outside is displayed on the image display unit B19, or When the image display unit B19 or the power supply unit C20 executes a safe operation for controlling the power supply unit A18 to be in a standby state, for example, viewing a video release (movie or the like) by using a projector in a public place. Information can be obtained quickly for existing spectators and users (such as viewers and handlers) who are not in a normal state at the time of the earthquake. In addition, it is possible to protect users (viewers and handlers) from dangers such as fire and electric shock.

1 is a schematic block diagram of a projector that projects an image on a projection object such as a screen according to Embodiment 1 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 1 of this invention. It is a schematic block diagram of the projector which projects an image on to-be-projected bodies, such as a screen, according to Embodiment 2 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 2 of this invention. It is a schematic block diagram of the projector which projects an image on to-be-projected bodies, such as a screen, according to Embodiment 3 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 3 of this invention. It is a schematic block diagram of the projector which projects an image | video on to-be-projected bodies, such as a screen, according to Embodiment 4 of this invention. It is a flowchart of the operation | movement process in the projector by Embodiment 4 of this invention. It is a schematic block diagram of the projector which projects an image on to-be-projected bodies, such as a screen, according to Embodiment 5 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 5 of this invention. It is a schematic block diagram of the projector which projects an image on to-be-projected bodies, such as a screen, according to Embodiment 6 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 6 of this invention. It is a schematic block diagram of the projector which projects an image on to-be-projected bodies, such as a screen, according to Embodiment 7 of the present invention. It is a flowchart of the operation | movement process in the projector by Embodiment 7 of this invention. It is a principle explanatory view of keystone correction. It is a block diagram of the projector by embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Acceleration detector, 2 Filter, 3 Power supply control part, 4 Power supply part, 5 Lamp power supply control part, 6 Lamp power supply part, 7 Light source lamp, 8 Power supply control part A, 9 Power supply part A, 10 Image control part, 11 Image display unit, 12 Image control unit A, 13 Image display unit A, 14 PICTURE_C, 15 PICTURE_D, 16 Control unit, 17 Product operation display unit, 18 Control unit A, 19 Image display unit B, 20 Power supply unit C, 21 Projection Image projected on the screen after setting the angle, 22 Image projected on the screen before setting the projection angle, 23 Projection angle, 24 Projector.

Claims (8)

A projector that projects an image on a projection object,
An acceleration detector that detects vibration;
A safety function unit that is automatically activated according to a detection result by the acceleration detector and executes a predetermined safe operation;
A projector comprising: A power supply for supplying power to the electrical circuit;
A power control unit that is provided with the safety function unit and controls the power source unit;
Further comprising
The projector according to claim 1, wherein the predetermined safe operation is an operation of controlling the power supply unit to a standby state according to a detection result by the acceleration detector. A light source lamp;
A lamp power supply for supplying power to the light source lamp;
The safety function unit is provided, and a lamp power supply control unit that controls the lamp power supply unit;
Further comprising
2. The projector according to claim 1, wherein the predetermined safe operation is an operation of controlling the lamp power supply unit to be cut according to a detection result by the acceleration detector. A power supply for supplying power to the electrical circuit;
A power control unit that is provided with the safety function unit and controls the power source unit;
Further comprising
The projector according to claim 1, wherein the predetermined safe operation is an operation of controlling the power supply unit to a cut-off state according to a detection result by the acceleration detector. An image display unit for displaying an image on the projection object;
An image control unit that is provided with the safety function unit and controls the image display unit;
Further comprising
2. The projector according to claim 1, wherein the predetermined safe operation is an operation for controlling the registered image data to be displayed on the image display unit in accordance with a detection result by the acceleration detector. . An image display unit for displaying an image on the projection object;
An image control unit that is provided with the safety function unit and controls the image display unit;
Further comprising
The predetermined safe operation is an operation of controlling to display predetermined image data input from the outside on the image display unit in accordance with a detection result by the acceleration detector. Projector. An operation display for displaying the operating status of the projector;
The safety function unit is provided, and a control unit that controls the operation display unit;
Further comprising
The projector according to claim 1, wherein the predetermined safe operation is an operation of controlling the operation display unit to notify a warning according to a detection result by the acceleration detector.   8. The projector according to claim 1, comprising a plurality of the configurations according to claim 2 to claim 7, respectively.

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