JP4802512B2 - Projection apparatus, operation control method and program for projection apparatus - Google Patents

Description

  The present invention relates to a projection apparatus that uses a high-temperature lamp that requires cooling, such as a high-pressure mercury lamp, as a light source, an operation control method for the projection apparatus, and a program.

  Conventionally, projector devices, including the purpose of preventing the deterioration of light source lamps such as high-pressure mercury lamps, which are extremely hot, have completed projection, called after-cooling, not only during projection operations, but also after projection operations. Even after the lamp is turned off, it is necessary to continuously drive the plurality of cooling fans to sufficiently cool the inside of the housing including the light source lamp.

  In this type of projector apparatus, the applied voltage to the light source lamp is reduced compared to that during normal projection to suppress the light emission luminance, and at the same time, the operation (rotation) speed of each cooling fan is suppressed to reduce noise. Some of them have an operation mode (silent mode).

In addition to this silent mode, there is a technology of a liquid crystal projector in which the internal temperature of the liquid crystal projector is detected and the cooling fan is driven to rotate at a drive voltage corresponding to the detected temperature in order to reduce the noise caused by the cooling fan. It is disclosed. (For example, Patent Document 1)
However, the plurality of cooling fans are generally driven and controlled collectively including the operation in the silent mode. Therefore, for example, when a foreign object is inserted into the fan blade part of one cooling fan or the rotation is hindered by cotton entangled with the rotating shaft part, the fan is destroyed and the insert etc. is destroyed by the fan. In order to prevent this, the light source lamp is turned off and all the cooling fans are stopped at once.
JP 2002-072170 A

  However, when all the cooling fans are stopped all at once by inserting a foreign object into one of the cooling fans, the light source lamp is also turned off accordingly. Since the inside of the apparatus does not flow at all, depending on the heat storage state of the apparatus itself, the internal temperature may rise for a certain time even after the light source lamp is turned off, and thereafter the internal temperature may be gradually lowered.

  That is, a situation in which the light source lamp cannot be cooled correctly due to the batch stop of the cooling fan may cause deterioration of the expensive light source lamp, significantly shortening its life, or in some cases rupturing the light source lamp. There was a problem that it was possible.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to minimize the rise in temperature inside the apparatus even when an abnormality occurs in the rotation of the cooling fan, and to reliably secure the light source lamp. It is an object of the present invention to provide a projection apparatus that can be cooled, an operation control method for the projection apparatus, and a program.

The invention described in claim 1 is a light source lamp, projection means for projecting an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans for generating cooling air for cooling the light source lamp. A detecting means for detecting an abnormality of each of the plurality of fans, and a control means for stopping the fan in which the abnormality is detected by the detecting means and operating another normal fan to continue cooling the light source lamp. When the control means detects an abnormality of the fan in the silent mode in which the light emission brightness of the light source lamp is suppressed as compared with the normal projection mode and the rotation speeds of the plurality of fans are suppressed, the light source lamp is turned off. The silent mode is canceled after stopping the fan that detects an abnormality, and the other normal fans are operated at least at the respective rotation speeds in the normal projection mode, and the light source Characterized in that to continue the cooling of the lamp.

According to a second aspect of the present invention, there is provided a light source lamp, projection means for projecting an image corresponding to the input image signal by light from the light source lamp, and a plurality of fans for generating cooling air for cooling the light source lamp. A detecting means for detecting an abnormality of each of the plurality of fans, and a control means for stopping the fan in which the abnormality is detected by the detecting means and operating another normal fan to continue cooling the light source lamp. The control means, when detecting an abnormality of the fan during the non-projection operation with the light source lamp turned off, operates another normal fan to continue cooling the light source lamp until a predetermined condition is satisfied. To do.

According to a third aspect of the present invention, in the first or second aspect of the invention, the detecting means detects an abnormality of each of the plurality of fans by a pulse signal detected from a motor that rotates the plurality of fans. It is characterized in that it is determined whether or not the rotational speed of the fan is decreasing or there is a fan that is stopped .

According to a fourth aspect of the present invention, there is provided a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. And a detection process for detecting an abnormality of each of the plurality of fans, a fan that detects the abnormality in the detection process is stopped, and another normal fan is operated to A control step of continuing cooling of the light source lamp, and the control step suppresses the light emission luminance of the light source lamp as compared with a normal projection mode and suppresses each rotation speed of the plurality of fans in the silent mode. When a fan abnormality is detected, the light source lamp is turned off, the fan that detected the abnormality is stopped, the silent mode is canceled, and other normal fans are at least in the normal projection mode. Running on the rotational speed when, characterized in that it further comprises the step of continuing the cooling of the light source lamp.

The invention according to claim 5 is a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. And a detection process for detecting an abnormality of each of the plurality of fans, a fan that detects the abnormality in the detection process is stopped, and another normal fan is operated to A control process for continuing cooling of the light source lamp, and when the abnormality of the fan is detected during the non-projection operation in which the light source lamp is turned off, the other normal fan is operated to cool the light source lamp. The method further includes a step of continuing until the predetermined condition is satisfied .

According to a sixth aspect of the present invention, there is provided a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. A program executed by a computer incorporated in the projection apparatus including: a detection step for detecting an abnormality of each of the plurality of fans; and a light emission luminance of the light source lamp as compared with a normal projection mode. When an abnormality is detected in the detection step in the silent mode for suppressing the rotation speeds of the plurality of fans, the light source lamp is turned off, the fan that detects the abnormality is stopped, the silent mode is canceled, It is performed by at least running in normal respective rotational speeds of the projection mode a working fan and a control step of continuing the cooling of the light source lamp in the computer And wherein the Rukoto.
The invention according to claim 7 is a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. A detection step for detecting an abnormality of each of the plurality of fans, and detecting the abnormality in the detection step during a non-projection operation in which the light source lamp is turned off. The computer is caused to execute a control step of operating another normal fan and continuing cooling of the light source lamp until a predetermined condition is satisfied.

According to the first aspect of the present invention, even if an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, since the light source lamp is turned off during the projection operation and then the cooling operation is started, the light source lamp can be cooled more reliably. In addition, if an abnormality occurs in the cooling fan during the silent mode, the cooling capacity of other normal cooling fans can be fully utilized by canceling the silent mode to ensure more reliable light source lamps. Can be reliably cooled.

According to the second aspect of the present invention, even when an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, even when an abnormality occurs in a part of the cooling fan during the after-cooling operation, the cooling can be reliably continued until the light source lamp does not need to be cooled.

According to the fourth aspect of the present invention, even when an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, since the light source lamp is turned off during the projection operation and then the cooling operation is started, the light source lamp can be cooled more reliably. In addition, if an abnormality occurs in the cooling fan during the silent mode, the cooling capacity of other normal cooling fans can be fully utilized by canceling the silent mode to ensure more reliable light source lamps. Can be reliably cooled.
According to the invention described in claim 5, even when an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, even when an abnormality occurs in a part of the cooling fan during the after-cooling operation, the cooling can be reliably continued until the light source lamp does not need to be cooled.

According to the sixth aspect of the present invention, even when an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, since the light source lamp is turned off during the projection operation and then the cooling operation is started, the light source lamp can be cooled more reliably. In addition, if an abnormality occurs in the cooling fan during the silent mode, the cooling capacity of other normal cooling fans can be fully utilized by canceling the silent mode to ensure more reliable light source lamps. Can be reliably cooled.
According to the seventh aspect of the present invention, even if an abnormality is detected in a part of the plurality of cooling fans, the cooling operation is continued by another normal cooling fan, so that the light source lamp can be reliably cooled. It becomes. In addition, even when an abnormality occurs in a part of the cooling fan during the after-cooling operation, the cooling can be reliably continued until the light source lamp does not need to be cooled.

  Hereinafter, an embodiment in which the present invention is applied to a projector apparatus will be described with reference to the drawings.

  1 is an external perspective view of the projector apparatus in use, FIG. 2 is a transverse plan view of the projector apparatus, and FIG. 3 is a longitudinal sectional view taken along line III-III in FIG.

  The projector device has a light source device 17 and a display area in which a plurality of pixels are arranged in a matrix in the row direction and the column direction in a projector case 1 having a rectangular planar shape, and is incident on the plurality of pixels. The display element 28 that controls the emission of the emitted light to display an image, the light source side optical system 29 that makes the emitted light from the light source device 17 incident on the display element 28, and the emitted light from the display element 28 are shown in the figure. The projection lens 45 which projects on projection surfaces, such as a screen which does not carry, is arrange | positioned.

  The projector case 1 includes a case main body 1a constituting both side surfaces, a rear surface, and a bottom surface, an upper panel 1b, and a front panel 1c. On the rear surface of the projector case 1, a personal computer USB terminal and a color image signal are provided. An audio signal input terminal, a video signal input terminal, and a power connector (none of which are shown) are provided. The overheat indicator 4 that displays 17 overheat, the automatic image quality adjustment key 5 and the silent mode setting key 6, the standby state in which the power connector is connected to a commercial power source, and the power color of the power key 2 are turned on. A changing power / standby indicator 7, various adjustment keys (not shown) operated by opening the opening / closing lid 8, and a speaker sound emitting unit 9 are provided. Is, on the front, the remote control receiving unit 10 for receiving an infrared signal from a remote control device (not shown) provided.

  Further, on the bottom surface of the projector case 1, a pair of left and right rear foot members 14a disposed on both sides of the rear region, and a position slightly rearward from the front edge of the case near the center of the front region. One forefoot member 14b is provided.

  The rear foot member 14a and the front foot member 14b support the projector case 1 in an obliquely upward state with the front side raised when the projector is used (during projection). It is fixed to the lower end of a screw leg (not shown) screwed to the bottom of the projector case 1, and the forefoot member 14b is held by a leg lock mechanism (not shown) provided in the projector case 1 so as to be slidable in the vertical direction. It is fixed to the lower end of the rod leg 15 and is provided so that the protruding height from the bottom surface of the case can be adjusted.

  Next, the light source device 17 will be described. As shown in FIGS. 2 and 3, the light source device 17 has a light source lamp 18 and an open surface for emitting light, and reflects the radiated light from the light source lamp 18 disposed therein to open the light source device 17. And a reflector 21 emitting from the surface.

  The light source lamp 18 is a short arc lamp such as a high-pressure mercury lamp having a spherical bulge in the middle. One reflector 21 is an ellipsoidal reflector having a focal point at a point in the reflector on the axis and a point in front of the open surface, and an ultraviolet transmissive reflective film is provided on the entire inner surface of the heat-resistant glass body. The cylindrical explosion-proof cover 25 and the explosion-proof glass 24 are fitted to the front side of the open surface.

  The display element 28 (see FIG. 2) is a display element that does not include a means for coloring incident light such as a color filter. In this embodiment, the display element 28 is generally a micromirror display element (Digital Micromirror Device) generally abbreviated as DMD. ) (Registered trademark). Hereinafter, the display element 28 is referred to as a micromirror display element.

  Although the configuration of the micromirror display element 28 is not shown, each pixel is arranged in an array in which each pixel is tilted in one tilt direction and the other tilt direction by a CMOS-based mirror driving element. These micromirrors are made of ultrathin metal pieces (for example, aluminum pieces) having a vertical and horizontal width of 10 [μm] to 20 [μm].

  The micromirror display element 28 is arranged on one side of the rear region in the projector case 1 with its front direction facing the projection port 11 provided on one side of the front surface of the projector case 1. .

  Further, the light source side optical system 29 that causes the light emitted from the light source device 17 to enter the micromirror display element 28 converts the light emitted from the light source device 17 into red, green, and blue as shown in FIGS. A color wheel 30 for sequentially coloring the three colors, a light guide rod 33 for making the intensity distribution of the light emitted from the light source device 17 uniform, and the light guide rod 33 colored by the color wheel 30. It comprises two light source side lenses 34 and 35 and a mirror 37 before and after projecting the light whose intensity distribution is made uniform toward the front surface of the micromirror display element 28.

  The color wheel 30 is composed of a rotating plate in which fan-shaped red, green and blue color filters are arranged in the circumferential direction, and is fixed to the rotating shaft of the color wheel rotating motor 32. Are arranged in the optical path of the outgoing light from the light source device 17 and the three color filters are rotated at high speed by the motor 32 so as to sequentially traverse the optical path of the outgoing light from the light source device 17. The

  The light guide rod 33 has a cross-sectional shape similar to the outer shape of a display area in which a plurality of pixels of the micromirror display element 28 are arranged in a matrix shape, and has a reflection film provided on the entire inner peripheral surface. An incident surface for entering light is formed at one end of the cylindrical body, an exit surface for light incident from the incident surface is formed at the other end, and the light incident from the incident surface is transmitted to the inner peripheral surface of the rod. The light is guided while being reflected by the reflective film, and light having a uniform intensity distribution is emitted from the emission surface.

  The light source side lenses 34 and 35 are disposed in a lens support tube 36 disposed on the light exit side of the light guide rod 33.

  The reflector 21 of the light source device 17, the color wheel rotation motor 32 of the light source side optical system 29, and the lens support cylinder 36 that supports the light guide rod 33 and the light source side lenses 34, 35 are open on the light source side. The housing 38 is fixed in a predetermined positional relationship.

  The mirror 37 of the light source side optical system 29 is a plane mirror. The mirror 37 has openings 40, 41, and 42 on one side, the rear surface, and the front surface. The exit end of the lens support tube 36 is inserted into the opening 40 on one side surface, and the rear surface opening 41 is displayed on the micromirror display. In the mirror housing 39 installed in the projector case 1 so as to face the element 28, the light source device is made to face the emission end of the lens support tube 36 across the front area of the micromirror display element 28. 17, the light transmitted through the color wheel 30, the light guide rod 33, and the light source side lenses 34 and 35 is reflected toward the micromirror display element 28, and the reflected light is reflected on the micromirror display element 28. It arrange | positions so that it may project from the direction inclined in one direction with respect to the front direction.

  A cover glass 43 that protects the micromirror display element 28 is disposed on the front surface of the micromirror display element 28. The cover glass 43 is provided on the front surface side of the opening on the rear surface of the mirror housing 39 and is emitted from the light source device 17. Then, the light projected on the micromirror display element 28 by the light source side optical system 29 is corrected to parallel light along a direction inclined by a predetermined angle with respect to the front direction of the micromirror display element 28, and the micromirror display element A relay lens 44 is provided that collects the image light emitted from the micromirror display element 28 and enters the projection lens 45.

  This relay lens 44 emits the light reflected on the surface of the relay lens among the projection light from the light source side optical system 29 in a direction other than the projection direction by the projection lens 45, and its effective area is Of the circular lens, it is a part corresponding to the display area of the micromirror display element 28, and the other part is an ineffective area. In this embodiment, the ineffective area is cut off from the circular lens. Yes.

  The projection lens 45 includes an incident-side fixed barrel 46 and an emission-side movable barrel 47 that is engaged with the fixed barrel 46 and moves forward and backward in the axial direction by a rotation operation. 47 is a variable focus lens provided with lens groups 48 and 49 each composed of a combination of a plurality of lens elements, and the incident end of the fixed barrel 46 is connected to the micromirror display via the relay lens 44. Opposite to the element 28, the exit end of the movable lens barrel 47 is movably fitted to the projection port 11 provided on one side of the front surface of the projector case 1, and is disposed in the projector case 1.

  On the side surface of the projector case 1 on the side where the projection lens is disposed, the movable lens barrel 47 of the projection lens 45 is manually rotated and moved in the axial direction to adjust the focus of the projection lens 45. Is provided.

  In the projector case 1, a display / audio circuit board 51 connected to a USB terminal (not shown) provided on the rear surface of the projector case 1, an input terminal for color image signals and audio signals, and a video signal input terminal is provided. Further, the projector case 1 is disposed in a standing state between the rear surface portion of the projector case 1 and the light source side housing 38, the micromirror display element 28 is provided on the circuit board 51, and a speaker is provided on the upper surface portion in the projector case 1. A speaker (not shown) arranged to face the sound emission unit 9 is connected.

  Further, a power system circuit board 52 connected to a power connector (not shown) provided on the rear surface of the projector case 1 is horizontally disposed in a space on the front side of the light source side housing 38 in the projector case 1. The light source lamp 18 of the light source device 17 is connected to the circuit board 52 via a lead wire (not shown), and the color wheel rotation motor 32 is also connected via a lead wire (not shown).

  In the projector case 1, a projector control circuit board 54 is horizontally disposed between the upper surface portion of the projector case 1 and the light source side housing 38 and the mirror housing 39. An audio system circuit board 51 and a power system circuit board 52, a lamp indicator 3 and an overheat indicator 4 provided on the upper surface of the projector case 1, an automatic image quality adjustment key 5 and a silent mode setting key 6, and a power / standby indicator 7. Various adjustment keys operated by opening the opening / closing lid 8, a receiving element (not shown) provided in the projector case 1 facing the remote control receiving unit 10 on the front surface thereof, and the reflector 21 in the light source side housing 38. A light source temperature measurement sensor (not shown) arranged in the vicinity is connected.

  Further, the bottom surface of the projector case 1, the side surface on the side where the projection lens 45 is disposed, and the rear surface are respectively provided with a plurality of long hole-like intake holes 55, 56, 57 for air-cooling the inside of the projector case 1. Is provided.

  The light source side housing 38 and the power supply system circuit board 52 are arranged with a ventilation space between the bottom surface portion of the projector case 1 and the plurality of air intake holes 55 on the bottom surface of the case are formed on the light source side housing. 38 and the power system circuit board 52.

  The projection lens 45 is disposed with a ventilation space between the side surface portion of the projector case 1 and the plurality of air intake holes 56 on the side surface of the case have projection lens focus adjustment openings 50 on the side surface of the case. It is provided over substantially the entire region of the rear portion.

  Further, the display / audio system circuit board 51 is disposed with a ventilation space between the upper surface portion of the projector case 1 and a plurality of air intake holes 57 on the rear surface of the case are formed on the micromirror display element 28. It is provided in a part corresponding to the arrangement part.

  Among the plurality of intake holes 55 on the bottom surface of the case, an intake hole (not shown) provided on the lower side of the power circuit board 52 and an intake hole 56 on the right side surface of the case are natural intake holes. An air intake hole 55 provided in a lower part of the light source side housing 38 and an air intake hole 57 provided in a part corresponding to the arrangement portion of the micromirror display element 28 on the rear surface of the case are forced air intake holes. 1, intake fans 58 and 59 are arranged to face the forced intake holes 55 and 57, respectively.

  A plurality of elongated exhaust holes 61 are provided on substantially the entire left side surface of the projector case 1 where the light source device 17 is disposed.

  Note that the side surface of the projector case 1 on the side where the light source device 17 is disposed is configured by a fitting panel 60, and the plurality of exhaust holes 61 are provided in substantially the entire area of the fitting panel 60.

  These exhaust holes 61 are all forced exhaust holes. In the projector case 1, a plurality of units, for example, three units are provided in correspondence with the region where the exhaust holes 61 are formed, that is, substantially the entire region of the fitting panel 60. Large wind exhaust fans 62, 63, 64 are arranged.

  The intake fans 58 and 59 and the exhaust fans 62, 63 and 64 are connected to the power supply system circuit board 52.

  A plurality of radiating fins 66 extending horizontally in parallel with the projector control circuit board 54 are directly disposed on the lower surface of the upper panel 1 b of the projector case 1. A plurality of these heat radiating fins 66 extend in the left-right direction in FIG. 3 along the flow of the cooling air W accompanying the rotational drive of the intake fans 58, 59 and the exhaust fans 62, 63, 64. Heat exchange between the outside air (particularly directly above the projector) and the cooling air W flowing in the projector is promoted through the top panel 1b and arranged in parallel at the same interval to cool the cooling air W.

  The projector emits light from the light source device 17 and rotationally drives the color wheel 30 of the light source side optical system 29 at high speed, whereby light emitted from the light source device 17 and incident on the light source side optical system 29 is obtained. The color wheel 30 sequentially colors red, green, and blue, and the light guide rod 33 makes the intensity distribution uniform, and the light source side lenses 34 and 35 and the mirror 37 form the micromirror display element 28. And sequentially writing single-color image data of red, green, and blue on the micromirror display element 28 in synchronization with the projection period of the red, green, and blue light. The red, green, and blue monochromatic images are sequentially displayed on the projector, and the red, green, and blue monochromatic image lights sequentially emitted from the micromirror display element 28 are projected onto the projection lens 4. It is designed to project expansion to the projection surface by, on the projection surface, to display red, green, full-color images that appear to overlap each other monochromatic image of three colors of blue.

  The projector is used by turning on the power by operating the power key 2. When the power is turned on, the light source lamp 18 of the light source device 17 is turned on, and the color wheel 30 is rotated. Then, red, green, and blue light are sequentially projected onto the micromirror display element 28, and red, green, and blue light sequentially emitted from the micromirror display element 28 are projected by the projection lens 45, and the intake fan. 58 and 59 and the exhaust fans 62, 63 and 64 are driven, and the air cooling in the projector case 1 is started.

  Further, the posture adjustment of the projector case 1 that matches the projection direction of the projection lens 45 with the projection surface is performed by adjusting the protrusion height of the forefoot member 14b in a state where the red, green, and blue light is projected by the projection lens 45. Is done.

  When no image signal or video signal is input from the personal computer, red, green and blue lights are sequentially emitted in full gradation from the entire display area of the micromirror display element 28, and the light is emitted by the projection lens 45. Projected. Therefore, the projection area of the projection surface at this time is white throughout.

  When the image signal or video signal is input, red, green, and blue single-color image data are sequentially written in the micromirror display element 28, and three colors of red, green, and blue are displayed on the projection surface. Images are sequentially projected to display a full color image.

  Further, after the image projection is finished, the input of the image signal or video signal is stopped and the power key 2 is operated to turn off the power. The light source of the light source device 17 is turned off by the power key 2 being operated. The lamp 18 is turned off, the rotational driving of the color wheel 30 is stopped, and after a certain time after the after cooling is completed, or when the light source temperature becomes a certain temperature or less, the intake fans 58 and 59 and the exhaust fan 62. , 63, 64 are stopped.

Next, the functional configuration of the main electronic circuit of the projector apparatus will be described with reference to FIG.
In the figure, image signals of various standards including RGB video signals input from the input / output connector unit 71 are converted into images of a predetermined format by the image conversion unit 73 via the input / output interface (I / F) 72 and the system bus SB. After being unified into a signal, it is sent to the projection encoder 74.

  The projection encoder 74 develops and stores the transmitted image signal in the video RAM 75, generates a video signal from the stored contents of the video RAM 75, and outputs the video signal to the projection processing unit 76.

  The projection processing unit 76 appropriately speeds up time division by multiplying an appropriate frame rate, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations in accordance with the transmitted image signal. The micromirror display element 28 is driven to display by driving.

  High-luminance white light emitted from the light source lamp 18 disposed in the reflector 21 is appropriately colored to the primary color via the color wheel 30 with respect to the micromirror display element 28, and the light guide rod 33, mirror By irradiating through 37 etc., an optical image is formed by the reflected light, and projected and displayed on a screen (not shown) through the projection lens 45 etc.

  However, the lighting driving of the light source lamp 18 and the color wheel rotation motor (M) 32 for rotating the color wheel 30 operate based on the supply voltage from the projection drive unit 77.

  The projection drive unit 77 also receives a detection signal from a light source temperature measurement sensor 78 attached in the vicinity of the light source lamp 18 of the reflector 21, digitizes it, and outputs it to the control unit 80.

  The control unit 80 controls all the operations of the above circuits. The control unit 80 includes a CPU, a non-volatile memory storing an operation program executed by the CPU including processing of a projection operation and a power supply control operation, which will be described later, and a work memory.

  The control unit 80 is also connected to an indicator unit 81, an audio processing unit 82, and a fan control unit 83 via the system bus SB.

  The indicator unit 81 includes a lamp indicator 3, an overheat indicator 4, and a power / standby indicator 7 disposed on the top panel 1b, and drives them to light / flash.

  The sound processing unit 82 includes a sound source circuit such as a PCM sound source, converts the sound data given at the time of the projection operation into an analog signal, and drives the speaker 84 provided in the speaker sound emitting unit 9 of the case main body 1a to generate a loud sound emission. Or beep if necessary.

  The fan control unit 83 controls and controls the cooling fans 87 including the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64, and power necessary for normal operation and silent mode operation described later. On the other hand, it is detected that the rotational speed is reduced or stopped by the pulse signal output in synchronization with the rotation of each of the fans 58, 59, 62 to 64.

  It should be noted that the key switch unit 85 is configured by various adjustment keys for opening the opening / closing lid 8 provided in the projector device, the power key 2, the automatic image quality adjustment key 5, and the silent mode setting key 6. Signals from the switch unit 85 and the Ir receiving unit 86 are directly input to the control unit 80.

  The Ir receiving unit 86 includes the remote control receiving unit 10 provided on the front surface of the projector device, and a remote control receiving unit (not shown) provided on the back surface in the same manner as the remote control receiving unit 10, and the infrared light reception signal is coded. The signal is converted and sent to the control unit 80.

Next, the operation of the above embodiment will be described.
FIG. 5 is a control process mainly related to the operation of the cooling fan 87 from when the power is turned on by operating the power key 2 until the power is turned off by operating the power key 2 again, or when the power is turned off by detecting some abnormality. The control operation is executed by the control unit 80 based on an operation program stored in advance in an internal nonvolatile memory.

  That is, when the power key 2 is operated, the control unit 80 first sets the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64 constituting the cooling fan 87 by the fan control unit 83, respectively, during normal operation. While the voltage is applied to drive the rotation (step S01), the light source lamp 18 is also driven to emit light by applying the rated voltage by the cooling fan 87 (step S02).

  While performing this normal operation, the fan control unit 83 detects the rotation states of the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64 that constitute the cooling fan 87 from the motor that rotates each fan. (Step S03) to determine whether there is an abnormal rotation, specifically, whether the rotational speed has decreased or there is a stopped fan (step S04), and at the same time, a silent mode setting key These states are obtained by repeatedly determining whether or not the silent mode is designated by the operation 6 (step S05) and whether or not the power key 2 is operated again to designate the power-off (step 06). Wait for.

  At the same time, the control unit 80 simultaneously drives the micromirror display element 28 based on the image signal input from the input / output connector unit 71 to form a light image generated by light emission from the light source lamp 18, and the projection lens 45. The light source lamp 18, which is projected and displayed on a screen (not shown) to be projected, is maintained at a predetermined temperature or less by the cooling air W generated by the rotational driving of the cooling fan 87.

  If the silent mode setting key 6 is operated during the normal operation, this is determined in step S05, and after setting the silent mode corresponding to the key operation (step S07), the process reaches step S06. .

  In the silent mode, for example, the applied voltage is lowered to a predetermined value so that the light emission luminance of the light source lamp 18 is about 70% of that during normal operation, and the intake fans 58 and 59 and the large wind force constituting the cooling fan 87 are also combined. The applied voltage is lowered to a predetermined value so that the air volume of the cooling air W by the exhaust fans 62, 63, 64 is also about 70% of that during normal operation, and the rotational speed of each fan 58, 59, 62, 63, 64 is increased. By reducing the noise mainly based on the wind noise of the fan, the brightness of the projected image is reduced to some extent, but the noise generated from the cooling fan 87 is reduced.

  However, when it is determined in step S04 that an abnormality has occurred in any of the fans constituting the cooling fan 87, the fan controller 83 then identifies the fan in which the abnormality has occurred (step S08). Only the generated fan is stopped from rotating (step S09).

  At the same time, the light source lamp 18 is turned off by the projection drive unit 77, and further heat generation by the light source lamp 18 serving as a heat source is suppressed (step S10).

  At the same time, the control unit 80 determines whether the silent mode is set instead of the normal operation mode at that time by the processing in step S07 (step S11), and the silent mode is set. Only when the determination is made, the silent mode is canceled and the setting to return to the normal operation mode is performed, so that the cooling by all the fans other than the fan that causes the abnormality constituting the cooling fan 87 described below is performed. A decrease in the air volume of the wind W is avoided (step S12).

  After that, among the fans 58, 59, 62, 63, 64 that constitute the cooling fan 87 by the fan control unit 83, operation setting for rotationally driving all the fans other than the fan that has specified the abnormality at the rated voltage is performed. (Step S13).

  Further, the temperature near the light source lamp 18 is detected by the light source temperature measuring sensor 78 (step S14), and whether or not the detected temperature is lower than a preset temperature at which the light source lamp 18 needs to be cooled by the cooling fan 87. Therefore, it is determined whether or not the light source lamp 18 needs to be cooled (step S15). If it is determined that cooling is still necessary, the process returns to step S14 and the light source temperature measurement sensor 78 returns to the light source lamp. By repeatedly executing the process of detecting the temperature 18, the process waits until the temperature of the light source lamp 18 decreases until cooling is unnecessary.

  Therefore, when it is determined in step S15 that the temperature of the light source lamp 18 has sufficiently decreased and cooling by all the fans other than the fan that has caused an abnormality is unnecessary, all the fans constituting the cooling fan 87 are not affected. The rotational drive is stopped (step S16), the power supply is completely turned off, and the process of FIG. 5 is terminated.

  In addition, the processes in steps S03 to S06 are repeatedly executed, and the power key 2 is operated to specify the power off from the state of waiting for an abnormality while performing the operation in the normal operation mode or the silent mode. In this case, this is determined in step S06, and in accordance with the operation specification of the power key 2, the light source lamp 18 is first turned off by the projection drive unit 77, and further heat generation by the light source lamp 18 serving as a heat source is suppressed (step S17). ).

  Thereafter, the control unit 80 determines the rotation states of the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64 constituting the cooling fan 87 by the fan control unit 83 based on pulse signals detected from the motors that rotate the fans. Search is performed (step S18), and it is determined whether or not there is an abnormal rotation, specifically, the rotational speed is decreased or there is a stopped fan (step S19).

  Here, if it is determined that an abnormality has occurred in any of the fans constituting the cooling fan 87, then the fan control unit 83 identifies the fan that has an abnormality (step S20), and the identified abnormality has occurred. Only the fan stops its rotational drive (step S21).

  Thereafter, the process proceeds from step S13 to cool the light source lamp 18 with a normal fan. When the cooling is no longer necessary, the power supply is completely turned off, and the process of FIG.

  If it is determined in step S19 that none of the fans constituting the cooling fan 87 is normal and all are normal, the process proceeds to step S14 as it is and the light source lamps 18 of all the fans are set. Cooling is performed, and when the cooling becomes unnecessary, the power supply is completely turned off, and the processing of FIG. 5 is ended.

  As described above, even when an abnormality is detected in a part of the plurality of cooling fans 58, 59, 62 to 64, the abnormal cooling fan is stopped and the cooling operation is continued by another normal cooling fan. Therefore, the light source lamp 18 can be reliably cooled.

  In the case of the above embodiment, when an abnormality of the cooling fan is detected during the projection operation, the light source lamp 18 is immediately turned off and the cooling operation is started. Therefore, the light source lamp 18 can be cooled more reliably, and the short life and destruction of the expensive light source lamp 18 can be reliably prevented.

  In addition, if any of the fans 58, 59, 62 to 64 becomes abnormal when the silent mode is set, the silent mode setting is canceled, so that other normal cooling fans are included. The light source lamp 18 can be surely cooled more reliably by fully utilizing the cooling capacity.

  In the above embodiment, the fans 58, 59, and 62 are operated not only during the projection operation but also when the power key 2 is operated from the power-on state to turn off the light source lamp 18 and shift to the after cooling. Even when an abnormality occurs in a part of ˜64, since the cooling is continued until the cooling of the light source lamp 18 becomes unnecessary, it is possible to reliably prevent shortening of the life and destruction of the expensive light source lamp 18.

  In the above embodiment, the cooling fan in which an abnormality has occurred is stopped, and then the remaining normal cooling fans are all driven by applying a rated voltage. However, the present invention is limited to this. First, use a cooling fan with a large amount of cooling air in advance and drive it with sufficient margin during normal operation. If it is judged normal when an abnormality occurs, stop the other cooling fan that caused the abnormality. In order to compensate for the shortage of wind power caused by the above, a higher voltage than that during normal operation may be applied to fully utilize the cooling capacity.

  In the above embodiment, a projector apparatus using a short arc lamp such as a high-pressure mercury lamp as the light source lamp 18 and a micromirror display element as the display element 28 has been described, but the present invention is not limited thereto. The present invention can be similarly applied to all projection apparatuses that use a light source lamp that generates heat by light emission driving and needs to be cooled at a high temperature.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a perspective view showing an external configuration of a projector apparatus according to an embodiment of the present invention. The cross-sectional top view of the projector apparatus which concerns on the same embodiment. The longitudinal cross-sectional view of the projector apparatus which followed the III-III line | wire of FIG. 2 based on the embodiment. 2 is a block diagram showing a functional configuration of the electronic circuit according to the embodiment. FIG. The flowchart which shows the processing content of the operation control of the cooling fan from the time of power-on to the time of power-off concerning the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector case, 2 ... Power key, 3 ... Lamp indicator, 4 ... Overheat indicator, 5 ... Automatic image quality adjustment key, 6 ... Silent mode setting key, 7 ... Power / standby indicator, 10 ... Remote control receiver, 15 ... Rod Leg, 17 ... Light source device, 18 ... Light source lamp, 19 ... Glass bulb, 21 ... Reflector, 22 ... Motor, 24 ... Explosion-proof glass, 25 ... Explosion-proof cover, 28 ... Micromirror display element, 29 ... Light source side optical system, 30 ... Color wheel, 32 ... Color wheel rotation motor, 33 ... Light guide rod, 34, 35 ... Light source side lens, 37 ... Mirror, 38 ... Light source side housing, 43 ... Cover glass, 44 ... Relay lens, 45 ... Projection lens, 52 ... Power supply system circuit board, 58, 59 ... Intake fan, 62-64 ... Large wind exhaust fan, 71 ... Input / output connector section 72 ... I / O interface, 73 ... Image conversion unit, 74 ... Projection encoder, 75 ... Video RAM, 76 ... Projection processing unit, 77 ... Projection drive unit, 78 ... Light source temperature measurement sensor, 80 ... Control unit, 81 ... Indicator unit , 82: Audio processing unit, 83 ... Fan control unit, 84 ... Speaker, 85 ... Key switch unit, 86 ... Ir receiving unit, 87 ... Cooling fan, SB ... System bus, W ... Cooling air.

Claims (7)

A light source lamp,
Projecting means for projecting an image corresponding to the input image signal with light from the light source lamp;
A plurality of fans that generate cooling air for cooling the light source lamp;
A detecting means for detecting an abnormality of each of the plurality of fans;
A control means for stopping the fan that has detected an abnormality by the detection means and operating another normal fan to continue cooling the light source lamp ,
When the control means detects an abnormality of the fan in the silent mode in which the light emission brightness of the light source lamp is suppressed as compared with the normal projection mode and the rotation speeds of the plurality of fans are suppressed, the light source lamp is turned off. The fan that has detected an abnormality is stopped, the silent mode is canceled, and other normal fans are operated at least at the respective rotation speeds in the normal projection mode to continue cooling the light source lamp. Projection device. A light source lamp,
Projecting means for projecting an image corresponding to the input image signal with light from the light source lamp;
A plurality of fans that generate cooling air for cooling the light source lamp;
A detecting means for detecting an abnormality of each of the plurality of fans;
A control means for stopping the fan that has detected an abnormality by the detection means and operating another normal fan to continue cooling the light source lamp,
The control means, when detecting a fan abnormality during a non-projection operation in which the light source lamp is turned off, operates another normal fan to continue cooling the light source lamp until a predetermined condition is satisfied. apparatus. The detecting means detects an abnormality of each of the plurality of fans by a pulse signal detected from a motor that rotates the plurality of fans, and a fan whose rotational speed is reduced or stopped is detected. projection apparatus according to claim 1 or 2, characterized in that to determine whether there. Operation control of a projection apparatus comprising: a light source lamp; a projection unit that projects an image corresponding to an input image signal with light from the light source lamp; and a plurality of fans that generate cooling air that cools the light source lamp A method,
A detection step of detecting an abnormality of each of the plurality of fans;
A control step of stopping the fan that has detected an abnormality in this detection step and operating another normal fan to continue cooling the light source lamp ,
The control process turns off the light source lamp when a fan abnormality is detected in a silent mode in which the light emission luminance of the light source lamp is suppressed and the rotation speeds of the plurality of fans are suppressed as compared with a normal projection mode. A step of stopping the fan that has detected an abnormality and then canceling the silent mode and operating other normal fans at least at the respective rotation speeds in the normal projection mode to continue cooling the light source lamp. An operation control method for a projection apparatus, comprising : Operation control of a projection apparatus comprising: a light source lamp; a projection unit that projects an image corresponding to an input image signal with light from the light source lamp; and a plurality of fans that generate cooling air that cools the light source lamp A method,
A detection step of detecting an abnormality of each of the plurality of fans;
A control step of stopping the fan that has detected an abnormality in this detection step and operating another normal fan to continue cooling the light source lamp ,
The control step further includes a step of operating another normal fan to continue cooling the light source lamp until a predetermined condition is reached when a fan abnormality is detected during a non-projection operation in which the light source lamp is turned off. An operation control method for a projection apparatus. Built in a projector that includes a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. A program executed by a computer,
A detection step for detecting an abnormality of each of the plurality of fans;
When the abnormality is detected in the detection step in the silent mode in which the light emission luminance of the light source lamp is suppressed as compared with the normal projection mode and the rotation speeds of the plurality of fans are suppressed , the light source lamp is turned off and the abnormality is detected. A control step of stopping the detected fan and then canceling the silent mode and operating other normal fans at least at the respective rotation speeds in the normal projection mode to continue cooling the light source lamp. A program characterized by being executed. Built in a projector that includes a light source lamp, a projection unit that projects an image corresponding to an input image signal with light from the light source lamp, and a plurality of fans that generate cooling air that cools the light source lamp. A program executed by a computer,
A detection step for detecting an abnormality of each of the plurality of fans;
When an abnormality is detected in the detection step during the non-projection operation when the light source lamp is turned off , the computer is caused to execute a control step of operating another normal fan and continuing cooling of the light source lamp until a predetermined condition is satisfied. A program characterized by

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