JP2007093880A - Projection device, method for controlling operation of projection device, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely protect a light source lamp by preventing temperature rise inside a projection device in advance even when a cooling fan is deteriorated with the lapse of time. <P>SOLUTION: The projection device includes: the light source lamp 18; a micro-mirror display element 28 for projecting an image corresponding to an input image signal with light from the light source lamp; a projection system including a projection lens 45; the cooling fan 87 for generating cooling air for cooling the light source lamp 18; and a control part 80 for measuring the cumulative operation time of the cooling fan 87 and stopping energizing the light source lamp 18 at the point of time when the measured value becomes a predetermined value. <P>COPYRIGHT: (C)2007,JPO&INPIT

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).

For example, even in the patent literature, the rotation speed of the cooling fan is controlled in accordance with the setting state of the device, and further, it is not necessary for the user when it is necessary to increase the rotation speed of the cooling fan due to a change in the setting of the device. In order not to give pleasure, it is provided with a cooling fan for cooling the inside of the equipment, a fan driving means for driving the cooling fan, and a temperature detecting means for detecting the temperature inside the equipment. A projection type display device that controls the number of rotations of the cooling fan in accordance with the temperature detected by the detecting means, wherein a plurality of setting switching means for switching the setting of the device and the setting switching means are operated. When the device settings change, the fan rotation speed control characteristics set for each device setting state are switched corresponding to the changed device setting state, and the fan rotation speed control characteristics after switching are changed. There techniques to have a eruption labor control means for controlling the rotational speed of the cooling fan is described. (For example, Patent Document 1)
JP 2005-099379 A

  However, a cooling fan that is generally used has no exception, for example, a characteristic that the aging deterioration occurs on the order of, for example, about 30,000 hours in cumulative operation time, and even if a rated voltage is applied, the specified rotation speed is not reached. have.

  Therefore, projectors that do not take into account the aging degradation of the cooling fan, including the technology described in the above-mentioned patent document, will eventually cause a situation where the light source lamp cannot be cooled properly due to long-term use. However, there is a problem in that the cooling of the light source is inadequate and the expensive light source lamp is deteriorated, and the life of the light source lamp is remarkably shortened.

  The present invention has been made in view of the above circumstances, and its purpose is to prevent temperature rise inside the device even when the cooling fan is aged and to reliably protect the light source lamp. It is an object of the present invention to provide a projection apparatus, an operation control method for the projection apparatus, and a program.

  The invention described in claim 1 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, a cooling fan that generates cooling air for cooling the light source lamp, It is characterized by comprising time measuring means for measuring the cumulative operation time of the cooling fan and control means for stopping energization of the light source lamp when the time measured by the time measuring means reaches a predetermined value.

  According to a second aspect of the invention, in the first aspect of the invention, the control means boosts and sets the drive voltage to the cooling fan when the time measured by the time measuring means reaches a first predetermined value. The power supply to the light source lamp is stopped when the second predetermined value is larger than the first predetermined value.

  The invention described in claim 3 is a light source lamp, projection means for projecting an image corresponding to the input image signal with light from the light source lamp, a cooling fan for generating cooling air for cooling the light source lamp, Rotational speed measuring means for measuring the rotational speed of the cooling fan, and control means for boosting the supply voltage to the cooling fan by a certain value when the measured value by the rotational speed measuring means becomes a predetermined value or less. It is characterized by having.

  The invention according to claim 4 is a light source lamp, projection means for projecting an image corresponding to the input image signal by light from the light source lamp, a cooling fan for generating cooling air for cooling the light source lamp, Temperature measuring means for measuring the temperature of the light source lamp, and control means for boosting the supply voltage to the cooling fan by a certain value when the measured value at the temperature measuring means becomes a predetermined value or less. It is characterized by.

  The invention according to claim 5 is the invention according to claim 3 or 4, wherein the control means stops energization of the light source lamp when a supply voltage to the cooling fan exceeds a preset limit value. It is characterized by doing.

  The invention according to claim 6 is the invention according to claim 3 or 4, wherein the control means reduces the light emission luminance of the light source lamp when the supply voltage to the cooling fan exceeds a preset limit value. It is characterized in that drive control is performed.

According to a seventh aspect of the present invention, in the above-described third and fourth aspects of the present invention, the cooling fan includes a plurality of cooling fans, and the control unit divides the plurality of cooling fans into a plurality of groups and performs the rotation for each group. According to the control based on the measured value by the number measuring means and the control based on the measured value by the temperature measuring means, the boosting setting of the supply voltage to the cooling fan is set for each of the fixed values.

  According to an eighth aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. An operation control method comprising: a time measuring process for measuring the cumulative operation time of the cooling fan; and a control process for stopping energization of the light source lamp when the time measured in the time measuring process reaches a predetermined value. It is characterized by that.

  According to a ninth aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. An operation control method comprising: a rotational speed measuring step for measuring the rotational speed of the cooling fan; and a supply voltage to the cooling fan at a constant value when a measured value in the rotational speed measuring process becomes a predetermined value or less. And a control step of boosting the voltage.

  According to a tenth aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. A temperature control process for measuring the temperature of the light source lamp, and the supply voltage to the cooling fan is boosted by a certain value when a measured value in the temperature measurement process becomes a predetermined value or less. And a control step.

  According to an eleventh aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. A program executed by a built-in computer, which measures a time step for measuring the cumulative operation time of the cooling fan, and stops energization of the light source lamp when the time value in the time measurement step reaches a predetermined value. The control step is executed by a computer.

  According to a twelfth aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal by light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. A program executed by a built-in computer, the rotation speed measuring step for measuring the rotation speed of the cooling fan, and when the measured value in the rotation speed measurement step becomes a predetermined value or less, And a control step of boosting the supply voltage by a certain value.

  According to a thirteenth aspect of the present invention, there is provided a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air for cooling the light source lamp. A program executed by a built-in computer, the temperature measuring step for measuring the temperature of the light source lamp, and the supply voltage to the cooling fan when the measured value in the temperature measuring step becomes a predetermined value or less. And a control step of boosting the voltage by a certain value.

  According to the first aspect of the present invention, even when the cooling fan has deteriorated over time, the temperature inside the apparatus can be prevented from rising and the light source lamp can be reliably protected.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to cope with a slight deterioration of the cooling fan over time, and when the cooling fan is still usable, the supply voltage is sequentially increased. By doing so, the projection operation can be continued to the end although some noise is generated.

  According to the third aspect of the present invention, the rotational speed of the cooling fan is constantly monitored, and when a decrease is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan deteriorates to some extent. Even if this occurs, it is possible to prevent the temperature inside the apparatus from rising, and to continue the projection operation while reliably protecting the light source lamp.

  According to the fourth aspect of the present invention, the temperature of the light source lamp is constantly monitored, and when a rise is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan is deteriorated to some extent. Even if it occurs, the temperature inside the apparatus can be prevented from rising, and the projection operation can be continued while reliably protecting the light source lamp.

  According to the invention described in claim 5, in addition to the effect of the invention described in claim 3 or 4, when the supply voltage to the cooling fan exceeds a preset limit value, the cooling fan is completely It can be determined that the light source lamp has deteriorated, the power supply to the light source lamp is stopped, and the light source lamp can be reliably protected.

  According to the invention described in claim 6, in addition to the effect of the invention described in claim 3 or 4, when the supply voltage to the cooling fan exceeds a preset limit value, the cooling fan is completely The projection operation can be continued while protecting the light source lamp by judging that the light source lamp has deteriorated and lowering the light emission luminance of the light source lamp and greatly reducing the amount of heat generated by the light source lamp.

  According to the seventh aspect of the invention, in addition to the effects of the third and fourth aspects, the cooling fan is deteriorated by performing finer control in accordance with the characteristics of each cooling fan. Even in this case, the projection operation can be continued for a longer time while suppressing the noise generated by the cooling fan as much as possible.

  According to the eighth aspect of the present invention, even when the cooling fan has deteriorated over time, the temperature inside the apparatus can be prevented from rising and the light source lamp can be reliably protected.

  According to the ninth aspect of the present invention, the rotational speed of the cooling fan is constantly monitored, and when a decrease is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan deteriorates to some extent. Even if this occurs, the temperature inside the apparatus can be prevented from rising, and the projection operation can be continued while reliably protecting the light source lamp.

  According to the tenth aspect of the present invention, the temperature of the light source lamp is constantly monitored, and when an increase is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan is deteriorated to some extent. Even if it occurs, the projection operation can be continued while the temperature inside the apparatus is prevented from being raised and the light source lamp is reliably protected.

  According to the eleventh aspect of the present invention, even when the cooling fan has deteriorated over time, the temperature inside the apparatus can be prevented from rising and the light source lamp can be reliably protected.

  According to the twelfth aspect of the present invention, the rotational speed of the cooling fan is constantly monitored, and when a decrease is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan deteriorates to a certain level. Even if this occurs, the temperature inside the apparatus can be prevented from rising, and the projection operation can be continued while reliably protecting the light source lamp.

  According to the thirteenth aspect of the present invention, the temperature of the light source lamp is constantly monitored, and when an increase is detected, the supply voltage to the cooling fan is sequentially increased, so that the cooling fan is deteriorated to some extent. Even if it occurs, the projection operation can be continued while the temperature inside the apparatus is prevented from being raised and the light source lamp is reliably protected.

(First embodiment)
A first embodiment when the present invention is applied to a projector apparatus will be described below 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. And a projection lens 45 that projects onto a projection surface such as a screen that is not.

  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. On the top surface, the power key 2, the lamp indicator 3 for displaying the lighting of the light source device 17, and the light source device 17 are provided. The display color changes between the overheat indicator 4 for displaying the 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 the commercial power supply, and the power key 2 is turned on. A power / standby indicator 7 to be operated, various adjustment keys (not shown) operated by opening the opening / closing lid 8, and a speaker sound emitting unit 9. The surface, providing a remote control receiving unit 10 for receiving an infrared signal from a remote control unit (not shown).

  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 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 so that the front direction thereof faces 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 disposed so as to collect the image light that is incident on 28 and exits 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 Since the portion corresponding to the display area of the micromirror display element 28 in the circular lens and the other portion are ineffective areas, in this embodiment, the shape in which the ineffective area is cut off from the circular lens To do.

  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. Opposing 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 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. Connected to a light source temperature measuring sensor 78, which will be described later, although not shown here. It is.

  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 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. The expansion to is intended to be projected onto the projection surface, to the projection surface, red, green, visual overlap monochromatic image of three colors of blue to display a full-color image.

  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, 59 and the exhaust fans 62, 63, 64 are driven, and 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 visually white as a whole.

  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, an EEPROM (Electrically Erasable Programmable Read Only Memory) 80 a that stores 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

  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 during 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 emit sound. Sound or generate a 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 supplies necessary power to each. It is individually detected that the rotation speed of the fans 58, 59, 62 to 64 is lowered or stopped by a pulse signal output in synchronization with the rotation.

  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 shows the contents of the control processing mainly related to the operation of the cooling fan 87 after the power is turned on by operating the power key 2. The control operation is an operation program stored in the internal EEPROM 80a by the control unit 80 in advance. Run based on.

  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 rotate (step S01), the light source lamp 18 is also driven to emit light by applying the rated voltage by the projection driving unit 77 (step S02).

  Thereafter, the contents of the initial value flag stored in advance in the EEPROM 80a and becoming “0 (zero)” when the cooling fan 87 is replaced are checked (step S03). It is determined whether or not the projection operation by operating 2 is the first after the cooling fan 87 is replaced (step S04).

  Here, the initial value “0 (zero)” is set as the cumulative operation time of the cooling fan 87 only when it is determined that it is the first projection operation after the cooling fan 87 is replaced according to the contents of the initial value flag. Is stored and set (step S05).

  If it is determined that the initial value flag is not the first projection operation after the cooling fan 87 is replaced, the accumulated operation time since the cooling fan 87 has been replaced is already set in the EEPROM 80a. Therefore, the process of step S05 is not performed.

  Thereafter, the cumulative operation time of the cooling fan 87 is measured and further updated to the EEPROM 80a (step S06), and then the first useful time, for example, 25,000 hours, set in advance after the update is set. It is determined whether or not it has elapsed (step S07). If it has not elapsed, the process returns to step S05.

  Thereafter, the operations of steps S05 and S06 are repeatedly executed, and the cooling fan 87 is driven at the rated voltage value, and the system waits for the cumulative operation time to reach the first service life.

  Accordingly, when the cumulative operation time stored in the EEPROM 80a has passed the first service life, this is determined in step S07, and the drive voltage of the cooling fan 87 is increased by a certain value, for example, 10% of the rated voltage. After performing the adjustment control (step S08), the cumulative operation time of the cooling fan 87 is again measured and updated to the EEPROM 80a (step S09), and the updated cumulative operation time is set in advance. It is determined whether or not a second service life, for example, 30,000 hours, which is greater than the service life of 1, has elapsed (step S10). If not, the process returns to step S09.

  Thereafter, by repeatedly executing the operations of steps S09 and S10, the cooling fan 87 is driven at a voltage value higher than the rated value by a constant value, and even if the cooling fan 87 itself has deteriorated over time, the amount of air generated is reduced. While the temperature of the light source lamp 18 of the light source device 17 is reliably cooled without decreasing, it waits for the cumulative operation time to reach the second service life.

  Accordingly, when the accumulated operation time stored in the EEPROM 80a has passed the second service life, this is determined in step S10, and at that time, the light source lamp 18 is turned off to stop the projection operation (step S11), and the cooling is performed. The fact that an error has occurred in the fan 87 is notified by, for example, blinking display of both the lamp indicator 3 and the overheat indicator 4 (step S12), and the processing in FIG. 5 is completed and the cooling fan 87 is replaced. Wait.

  As described above, even when the cooling fan 87 deteriorates over time, the operating time of the cooling fan 87 used for the projection operation is measured and managed, so that the internal temperature of the projector apparatus may increase. Therefore, the light source lamp 18 can be reliably protected.

  In addition, in the above-described embodiment, by setting a plurality of time values to be compared with the operation time of the cooling fan 87, it is possible to cope with minor aging of the cooling fan 87, and in a state where the cooling fan is still usable. By increasing the supply voltage, it is possible to maintain the state in which the amount of cooling air is not reduced although some noise is generated, and the projection operation can be continued until the end when it is determined that the cooling fan 87 cannot be used completely due to deterioration over time.

(Second Embodiment)
A second embodiment in which the present invention is applied to a projector apparatus will be described below with reference to the drawings.

  The perspective view of the projector device in use is shown in FIG. 1, the cross-sectional view is shown in FIG. 2, the longitudinal cross-sectional view is shown in FIG. 3, and the functional configuration of the main electronic circuit is shown. Are basically the same as those in FIG. 4 described above, and the same reference numerals are used for the same parts and their illustration and description are omitted.

Next, the operation of the above embodiment will be described.
FIG. 6 shows the contents of the control processing mainly related to the operation of the cooling fan 87 after the power is turned on by operating the power key 2. The control operation is an operation program stored in the internal EEPROM 80a by the control unit 80 in advance. Run based on.

  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 and rotated (step S21), the light source lamp 18 is also driven to emit light by applying the rated voltage by the projection driving unit 77 (step S22).

  Thereafter, the contents of the initial value flag stored in advance in the EEPROM 80a and becoming “0 (zero)” when the cooling fan 87 is replaced are checked (step S23). Whether or not the projection operation by operating No. 2 is the first after the cooling fan 87 is replaced is determined (step S24).

  Here, only when it is determined from the content of the initial value flag that the projection operation is the first after the cooling fan 87 is replaced, the fan control unit 83 configures the intake fans 58 and 59 and the large fan. Each rotation state of the wind exhaust fans 62, 63, 64 is measured by a pulse signal detected from a motor that rotates each fan (step S25), and stored in the EEPROM 80a as the number of rotations of the cooling fan 87 during normal rotation. (Step S26).

  If it is determined that the content of the initial value flag is not the first projection operation after the cooling fan 87 is replaced, the processes in steps S25 and S26 are not performed.

  Thereafter, the rotational speeds of the individual fan motors constituting the cooling fan 87 are actually measured (step S27), and the measured rotational speeds are compared based on the rotational speeds stored in the EEPROM 80a, resulting in a lower value. It is determined whether or not deterioration due to aging has occurred (step S28).

  Here, when it is determined that the actually measured rotational speed of the cooling fan 87 is equivalent to the rotational speed stored in the EEPROM 80a, the individual fan motors constituting the cooling fan 87 have not deteriorated over time. Then, the process returns to step S27 again.

  Thereafter, by repeatedly executing the operations in steps S27 and S28, the cooling fan 87 is driven at the rated voltage value, and the process waits for the rotational speed to decrease due to deterioration over time.

  If at least one of the rotation speeds of the individual fan motors constituting the cooling fan 87 is lower than the corresponding rotation speed stored in the EEPROM 80a, this is determined in step S28, and the cooling fan 87 is configured. After performing adjustment control to increase the drive voltage of each fan motor by a fixed value, for example, 5% of the rated voltage (step S29), the drive voltage is set to a limit value set in advance by the adjustment, for example, the rated voltage. After confirming that it has not exceeded the 25% increment (step S30), the processing from step S27 is resumed.

  Thus, adjustment control is performed so that the drive voltage is increased by a certain value when the drive voltage of the individual fan motors constituting the cooling fan 87 falls below a specified rotational speed within a range not exceeding the limit value. The rotation speed of the cooling fan 87 is always maintained and the light source lamp 18 is reliably cooled.

  Accordingly, as a result of sequentially increasing the drive voltage by a certain value due to the deterioration of the cooling fan 87, when the limit value is exceeded, this is immediately judged in step S30, and the light source lamp 18 is turned off at that time. Then, the projection operation is stopped (step S31), and the fact that an error has occurred in the cooling fan 87 is notified by, for example, blinking display of both the lamp indicator 3 and the overheat indicator 4 (step S32). The process is terminated and the system waits for the cooling fan 87 to be replaced.

  In this way, the number of rotations of the cooling fan 87 is constantly monitored, and when a decrease is detected, the supply voltage to the cooling fan 87 is sequentially increased, so that the cooling fan 87 has deteriorated to some extent. Even in this case, it is possible to prevent the temperature inside the apparatus from rising and to continue the projection operation while reliably protecting the light source lamp.

  In addition, when the supply voltage to the cooling fan 87 exceeds a preset limit value, it is determined that the cooling fan 87 has completely deteriorated, and the power supply to the light source lamp 18 is stopped. The light source lamp 18 can be reliably protected.

  In the above embodiment, in order to facilitate the explanation, at least one of the individual fan motors of the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64 that constitute the cooling fan 87 has a specified rotation. Although it has been described that the supply voltage is uniformly increased by a constant value when the number is lower than the number, it is not necessary to increase the drive voltage of the fan motor whose rotation speed has not decreased. The same control is performed for each motor.

(Third embodiment)
A third embodiment when the present invention is applied to a projector apparatus will be described below with reference to the drawings.

  The perspective view of the projector device in use is shown in FIG. 1, the cross-sectional view is shown in FIG. 2, the longitudinal cross-sectional view is shown in FIG. 3, and the functional configuration of the main electronic circuit is shown. Are basically the same as those in FIG. 4 described above, and the same reference numerals are used for the same parts and their illustration and description are omitted.

Next, the operation of the above embodiment will be described.
In this embodiment, intake fans 58 and 59 constituting cooling fan 87 are in a first group (referred to as “first group” in the figure), and large wind exhaust fans 62, 63, and 64 are in a second group (see FIG. Now, the case where the control is performed in units of groups divided into two groups will be described.

  FIG. 7 shows the contents of the control process mainly related to the operation of the cooling fan 87 after the power is turned on by operating the power key 2. The control operation is an operation program stored in the internal EEPROM 80a by the control unit 80 in advance. Run based on.

  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 applying a voltage to drive the rotation (step S41), the projection driving unit 77 applies a rated voltage to the light source lamp 18 to drive the light emission (step S42).

  Thereafter, the contents of the initial value flag stored in advance in the EEPROM 80a and becoming “0 (zero)” when the cooling fan 87 is replaced are checked (step S43). Whether or not the projection operation by operating No. 2 is the first after the cooling fan 87 is replaced is determined (step S44).

  Here, only when it is determined from the content of the initial value flag that the projection operation is the first after the cooling fan 87 is replaced, the fan control unit 83 configures the intake fans 58 and 59 and the large fan. Each rotation state of the wind exhaust fans 62, 63, 64 is measured by a pulse signal detected from a motor that rotates each fan (step S45), and is stored in the EEPROM 80a as the number of rotations of the cooling fan 87 during normal rotation. (Step S46).

  If it is determined that the content of the initial value flag is not the first projection operation after the cooling fan 87 is replaced, the processes in steps S45 and S46 are not performed.

  After that, among the cooling fans 87, the rotational speeds of the fan motors of the intake fans 58 and 59 that constitute the first group (group) are actually measured (step S47), and the measured rotational speed is stored in the EEPROM 80a. The corresponding number of revolutions is compared as a reference, and it is determined whether or not deterioration due to aging has occurred depending on whether or not the value is lower (step S48).

  Here, if it is determined that the actually measured rotational speed of the intake fans 58 and 59 constituting the first group is equal to the rotational speed stored in the EEPROM 80a, the individual intake fan motors 58 and 59 still have individual fan motors. Assuming that no aging has occurred, the process returns to step S47.

  Thereafter, the operations of steps S47 and S48 are repeatedly executed to drive the intake fans 58 and 59 at the rated voltage value and wait for the rotational speed to decrease due to deterioration over time.

  If at least one of the rotational speeds of the individual fan motors 58 and 59 falls below the corresponding rotational speed stored in the EEPROM 80a, this is determined in step S48, and the individual intake fans 58 and 59 are individually detected. After performing adjustment control to increase the drive voltage of the fan motor by a certain value, for example, 5% of the rated voltage (step S49), the drive voltage is set to a limit value set in advance by the adjustment, for example, 25 of the rated voltage. After confirming that the percentage increment has not been exceeded (step S50), the processing from step S47 is resumed.

  In this way, adjustment control is performed such that when the drive voltage of each fan motor 58, 59 of the first group does not exceed the limit value, the drive voltage is increased by a certain value when it falls below a specified rotational speed. The light source lamp 18 is reliably cooled by always maintaining the rotational speed of the intake fans 58 and 59.

  Accordingly, as a result of sequentially increasing the drive voltage by a constant value due to the deterioration of the intake fans 58 and 59, when the limit value is exceeded, this is immediately judged in step S50, and for the time being, the intake air of the first group After setting the drive voltage of the fans 58 and 59 to the rated value in the fan control unit 83 (step S51), the large wind exhaust fans 62, 63 and 64 constituting the second group (group) are then rated. Adjustment control is performed to increase the voltage by a certain value, for example, 5% of the rated voltage (step S52).

  Next, the detected temperature from the light source temperature measuring sensor 78 is checked (step S53), and it is determined whether or not the light source lamp 18 exceeds a specified temperature (step S54).

  Here, if the light source lamp 18 is within the specified temperature range, it is assumed that there is no problem, and the process returns to step S53 again.

  Thereafter, the operations of steps S53 and S54 are repeatedly executed, whereby the intake fans 58 and 59 are set to rated voltage values, and the large wind exhaust fans 62, 63 and 64 are set to voltages obtained by raising the rated voltage values by a fixed value. While driving each, it waits for the detected temperature of the light source lamp 18 to exceed a specified value.

  If the detected temperature of the light source lamp 18 exceeds the specified value, this is determined in step S54, and the driving voltages of the individual fan motors of the second group of large wind exhaust fans 62, 63, 64 are further increased by a certain value. For example, after performing adjustment control to increase the rated voltage by 5% (step S55), the adjustment confirms that the drive voltage does not exceed a preset limit value, for example, 25% increment of the rated voltage. After that (step S56), the processing from step S53 is reached again.

  In this way, the drive voltage of the individual fan motors of the first group of intake fans 58 and 59 is intentionally maintained at the rated value, and the decrease in the cooling air volume is gradually reduced to the drive voltage of the second group of large wind exhaust fans 62, 63 and 64. The light source lamp 18 is reliably cooled while supplementing by raising.

  Therefore, as a result of increasing the drive voltage of the large wind exhaust fans 62, 63, 64 by a predetermined value, if the limit value is exceeded, this is immediately judged in step S56, and the second group is more than that. The large wind exhaust fan 62, 63, 64 cannot be compensated for by an increase in the driving voltage, and at that time, the light source lamp 18 is turned off to stop the projection operation (step S57), and an error occurs in the cooling fan 87. The occurrence is notified by, for example, blinking display of both the lamp indicator 3 and the overheat indicator 4 (step S58), and the processing of FIG. 7 is finished as described above, and the cooling fan 87 is waited to be replaced.

  In this way, the temperature of the light source lamp is constantly monitored, and if an increase is detected, the supply voltage to the cooling fan is increased sequentially, so that even if the cooling fan has deteriorated to some extent, Therefore, the projection operation can be continued while the light source lamp is reliably protected.

  In addition, in the above-described embodiment, the first group of intake fans 58 and 59 and the second group of large wind exhaust fans 62, 63, and 64 that constitute the cooling fan 87 are separated, and the characteristics of the individual cooling fans, etc. Even if some of the cooling fans are deteriorated, the projection operation is continued for a longer time while suppressing the noise generated by other cooling fans as much as possible. be able to.

(Fourth embodiment)
A fourth embodiment when the present invention is applied to a projector apparatus will be described below with reference to the drawings.

  The perspective view of the projector device in use is shown in FIG. 1, the cross-sectional view is shown in FIG. 2, the longitudinal cross-sectional view is shown in FIG. 3, and the functional configuration of the main electronic circuit is shown. Are basically the same as those in FIG. 4 described above, and the same reference numerals are used for the same parts and their illustration and description are omitted.

Next, the operation of the above embodiment will be described.
FIG. 8 shows the contents of the control processing mainly related to the operation of the cooling fan 87 after the power is turned on by operating the power key 2. The control operation is an operation program stored in the internal EEPROM 80a by the control unit 80 in advance. Run based on.

  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 and rotated (step S61), the light source lamp 18 is also driven to emit light by applying the rated voltage by the projection driving unit 77 (step S62).

  Thereafter, the contents of the initial value flag stored in advance in the EEPROM 80a and becoming “0 (zero)” when the cooling fan 87 is replaced are checked (step S63). It is determined whether or not the projection operation by operating 2 is the first after the cooling fan 87 is replaced (step S64).

  Here, only when it is determined from the content of the initial value flag that the projection operation is the first after the cooling fan 87 is replaced, the fan control unit 83 configures the intake fans 58 and 59 and the large fan. Each rotation state of the wind exhaust fans 62, 63, 64 is measured by a pulse signal detected from a motor that rotates each fan (step S65), and stored in the EEPROM 80a as the number of rotations of the cooling fan 87 during normal rotation. (Step S66).

  If it is determined that the content of the initial value flag is not the first projection operation after the cooling fan 87 is replaced, the processes of steps S65 and S66 are not performed.

  Thereafter, the rotational speeds of the fan motors of the intake fans 58 and 59 and the large wind exhaust fans 62, 63 and 64 constituting the cooling fan 87 are actually measured (step S67), and the measured rotational speeds are stored in the EEPROM 80a. Each corresponding number of revolutions is compared as a reference, and it is determined whether or not deterioration due to aging has occurred depending on whether or not at least one has a lower value (step S68).

  Here, if it is determined that the measured rotational speeds of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 are all equal to the rotational speeds stored in the EEPROM 80a, the intake fans 58, 59, 59 and the large wind exhaust fans 62, 63, 64 Assuming that the individual fan motors have not deteriorated over time, the processing returns to step S67 again.

  Thereafter, by repeatedly executing the operations of steps S67 and S68, the intake fans 58 and 59 and the large wind exhaust fans 62, 63 and 64 constituting the cooling fan 87 are driven at rated voltage values, respectively. Wait for the rotation speed to decrease due to aging.

  If at least one of the rotational speeds of the individual fan motors falls below the corresponding rotational speed stored in the EEPROM 80a, this is determined in step S68. After the determination, adjustment control is performed to increase the drive voltage of each of the intake fans 58 and 59 and the large wind exhaust fans 62, 63, and 64 by a certain value, for example, 5% of the rated voltage (step S69). ) After confirming that the drive voltage does not exceed a preset limit value, for example, 25% increment of the rated voltage (step S70), the process from step S67 is resumed.

  In this way, when the drive voltage of each of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 constituting the cooling fan 87 does not exceed the limit value, it is driven when it falls below a specified rotational speed. Adjustment control is performed to increase the voltage by a certain value, and the rotation speed of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 is always maintained to cool the light source lamp 18 reliably.

  Accordingly, as a result of sequentially increasing the drive voltage by a certain value due to deterioration of the intake fans 58 and 59 and the large wind exhaust fans 62, 63 and 64, if the limit value is exceeded, this is immediately performed in step S70. A warning output is made on the assumption that any one of the fan motors constituting the cooling fan 87 has deteriorated over time, for example, the lamp indicator 3 and the overheat indicator 4 are both notified by flashing the emission color yellow ( In step S71), the voltage applied to the light source lamp 18 is set to the lowest value within the allowable range, so that the light emission is driven at low luminance, and the amount of heat generated from the light source lamp 18 is reduced. (Step S72), the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 constituting the cooling fan 87 are The dynamic voltage respectively set to the fan controller 83 to return to the rated value (step S73).

  Next, the detected temperature from the light source temperature measuring sensor 78 is checked (step S74), and it is determined whether or not the light source lamp 18 exceeds a specified temperature (step S75).

  Here, if the light source lamp 18 is within the specified temperature range, it is assumed that there is no problem, and the process returns to step S74 again.

  Thereafter, by repeatedly executing the operations in steps S74 and S75, the detected temperature of the light source lamp 18 is specified while the intake fans 58 and 59 and the large wind exhaust fans 62, 63 and 64 are driven at rated voltage values, respectively. Wait for the value to be exceeded.

  If the detected temperature of the light source lamp 18 exceeds the specified value, this is determined in step S75, and the drive voltages of the individual fan motors of the intake fans 58 and 59 and the large wind exhaust fans 62, 63 and 64 are set to a constant value. For example, 5% of the rated voltage is adjusted (step S76), and then the drive voltage does not exceed a preset limit value, for example, 25% increment of the rated voltage. After confirming (step S77), the processing from step S74 is reached again.

  In this way, the light source lamp 18 emits light with low brightness, and while the heat generation amount itself is suppressed, the drive voltage of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 is gradually increased to reliably cool the light source lamp 18. Let

  Accordingly, as a result of increasing the drive voltages of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64 by a certain value, if the limit value is exceeded, this is immediately judged in step S77, It is assumed that the above cannot be compensated for by the increase of the drive voltage of the intake fans 58, 59 and the large wind exhaust fans 62, 63, 64. At that time, the light source lamp 18 is turned off and the projection operation is stopped (step S78). ), The fact that an error has occurred in the cooling fan 87 is notified by, for example, blinking display in red of both the lamp indicator 3 and the overheat indicator 4 (step S79), and the processing of FIG. Wait for the to be replaced.

  Thus, when the supply voltage to the individual fans constituting the cooling fan 87 exceeds a preset limit value, it is determined that the cooling fan has deteriorated, and the light emission luminance of the light source lamp 18 is determined. , And the amount of heat generated by the light source lamp 18 is greatly reduced, so that the projection operation can be continued while the light source lamp 18 is matched with the decrease in cooling capacity and the light source lamp 18 is protected.

  The first to fourth embodiments have been described with respect to the case where the present invention is applied to a projector apparatus using a micromirror display element 28, but the present invention is not limited to this. Of course, the present invention can be similarly applied to a liquid crystal projector apparatus using a transmission type color liquid crystal panel as a display element.

  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 a first 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 at the time of the power supply which concerns on the embodiment. The flowchart which shows the processing content of the cooling fan operation control at the time of power-on which concerns on the 2nd Embodiment of this invention. The flowchart which shows the processing content of the operation control of the cooling fan at the time of power-on which concerns on the 3rd Embodiment of this invention. The flowchart which shows the processing content of the operation control of the cooling fan at the time of power-on which concerns on the 4th Embodiment of this invention.

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, 80a ... EEPROM, DESCRIPTION OF SYMBOLS 81 ... Indicator part, 82 ... Audio | voice processing part, 83 ... Fan control part, 84 ... Speaker, 85 ... Key switch part, 86 ... Ir receiving part, 87 ... Cooling fan, SB ... System bus, W ... Cooling air.

Claims (13)

A light source lamp,
Projecting means for projecting an image corresponding to the input image signal with light from the light source lamp;
A cooling fan that generates cooling air for cooling the light source lamp;
A time measuring means for measuring the cumulative operation time of the cooling fan;
And a control unit that stops energization of the light source lamp when the time measured by the time measuring unit reaches a predetermined value.   The control means boosts the drive voltage to the cooling fan when the time measured by the time measuring means reaches a first predetermined value, and when the second predetermined value greater than the first predetermined value is reached. The projection apparatus according to claim 1, wherein energization of the light source lamp is stopped. A light source lamp,
Projecting means for projecting an image corresponding to the input image signal with light from the light source lamp;
A cooling fan that generates cooling air for cooling the light source lamp;
A rotational speed measuring means for measuring the rotational speed of the cooling fan;
A projection apparatus comprising: control means for stepping up the supply voltage to the cooling fan by a certain value when the value measured by the rotational speed measurement means becomes a predetermined value or less. A light source lamp,
Projecting means for projecting an image corresponding to the input image signal with light from the light source lamp;
A cooling fan that generates cooling air for cooling the light source lamp;
Temperature measuring means for measuring the temperature of the light source lamp;
A projection apparatus comprising: control means for stepping up the supply voltage to the cooling fan by a predetermined value when the measured value by the temperature measuring means becomes a predetermined value or less.   5. The projection apparatus according to claim 3, wherein the control unit stops energization of the light source lamp when a supply voltage to the cooling fan exceeds a preset limit value.   5. The projection apparatus according to claim 3, wherein the control unit performs drive control so that the light emission luminance of the light source lamp decreases when a supply voltage to the cooling fan exceeds a preset limit value. 6. . The cooling fan consists of multiple
The control means divides the plurality of cooling fans into a plurality of groups, and controls each of the cooling fans by control based on the measurement value of the rotation speed measurement means and control based on the measurement value of the temperature measurement means for each group. 5. The projection apparatus according to claim 3, wherein the supply voltage is boosted by the predetermined value. An operation control method for a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp.
A time measuring process for measuring the cumulative operation time of the cooling fan;
And a control step of stopping energization of the light source lamp when the measured value in the timing step reaches a predetermined value. An operation control method for a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp.
A rotational speed measurement step for measuring the rotational speed of the cooling fan;
And a control step of boosting the supply voltage to the cooling fan by a certain value when the measured value in the rotational speed measurement step becomes a predetermined value or less. An operation control method for a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp.
A temperature measuring step for measuring the temperature of the light source lamp;
And a control step of boosting the supply voltage to the cooling fan by a predetermined value when the measurement value in the temperature measurement step becomes a predetermined value or less. A program executed by a computer incorporated in a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp. Because
A time measuring step for measuring the cumulative operation time of the cooling fan;
A program that causes a computer to execute a control step of stopping energization of the light source lamp when a time measured value in the time measuring step reaches a predetermined value. A program executed by a computer incorporated in a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp. Because
A rotational speed measuring step for measuring the rotational speed of the cooling fan;
A program for causing a computer to execute a control step of boosting a supply voltage to the cooling fan by a certain value when a measured value in the rotational speed measuring step becomes a predetermined value or less. A program executed by a computer incorporated in a projection apparatus comprising: a projection system that projects an image corresponding to an input image signal with light from a light source lamp; and a cooling fan that generates cooling air that cools the light source lamp. Because
A temperature measuring step for measuring the temperature of the light source lamp;
A program that causes a computer to execute a control step of boosting a supply voltage to the cooling fan by a certain value when a measured value in the temperature measuring step becomes a predetermined value or less.

Images