JP2017173476A - Projection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection device capable of sharply rising the lamp temperature safely immediately after turning ON a lamp, and capable of turning OFF the lamp in a short time after turning ON the lamp without reducing the lamp service life.SOLUTION: The projection device includes: a lamp unit for generating light; means that returns light and heat from the lamp to the lamp by using a shutter unit; means that drives the shutter unit; and means that determines to drive the driving means to thereby raise the lamp temperature.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection apparatus having a light source such as a high-pressure mercury lamp, and more particularly to improvement of user convenience.

  Conventionally, a projection device uses various light sources and projects light from the light sources onto a screen. One example is a high-pressure mercury lamp. A high-pressure mercury lamp that generates projection light vaporizes mercury in a glass tube under high pressure, uses it as a catalyst between discharge electrodes, and discharges between the electrodes to generate light.

  Also, high-pressure mercury lamps become hot when they emit light, and the temperature inside the projection device rises, which affects other devices in the projection device. Therefore, the high-pressure mercury lamp is usually cooled by the air flow created by the cooling fan motor. Have been.

  The high-pressure mercury lamp has an unstable mercury vaporization state until it emits light and the temperature rises due to its own heat. If the lamp is turned off while the temperature is rising and the temperature drops, a problem will occur in the solidified state of mercury inside the lamp and the lamp life will be shortened. The light emission state is also unstable.

  For this reason, since the lamp is turned on after the lamp has been turned on for a time when the lamp temperature rises to a temperature at which the lamp can be turned off, the user needs to wait for a long time.

  Therefore, Patent Document 1 discloses a method of controlling the fan motor to weaken the air volume to accelerate the lamp temperature rise.

JP 2003-35932 A

  However, the prior art disclosed in the above-mentioned Patent Document 1 considers only the temperature rise of the lamp when the lamp is turned on, and does not consider the operation of turning off the lamp immediately after the lamp is turned on. Further, in the method of controlling the cooling fan motor of Patent Document 1 to change the air volume to promote the temperature rise, it is difficult to ensure the safety because the peripheral members other than the lamp become high temperature. Furthermore, in order to control the air volume of the fan motor, a feedback circuit using an advanced sensor is required, resulting in an expensive circuit.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a projection device that can quickly turn off the lamp temperature immediately after the lamp is turned on and can be turned off in the shortest time without shortening the lamp life after the lamp is turned on. It is in.

In order to achieve the above object, a projection apparatus according to the present invention provides:
In the projection device,
A lamp device for generating light;
Means for returning heat from the lamp to the lamp using a shutter unit;
Means for driving the shutter unit;
Means for determining to drive the drive means;
The lamp temperature is raised.

  An object of the projection apparatus according to the present invention is to stabilize the lamp immediately after lighting and to turn off the lamp in the shortest time. Therefore, a device for reflecting the heat energy from the lamp to the lamp is inserted in front of the lamp to accelerate the temperature rise of the lamp. As described above, it is possible to shorten the time until the lamp is stabilized immediately after the lighting, and it is possible to provide a projection apparatus that can shorten the lamp turning-off time after the power is turned on.

It is a block diagram of the configuration of the projection apparatus of the present invention. It is a flowchart which shows operation | movement of this invention. It is a 2nd block diagram of the projection apparatus of this invention. It is a 2nd flowchart which shows operation | movement of this invention.

  When the projection device receives a turn-off command immediately after the lamp is turned on, the projector operates the shutter unit disposed between the lamp and the optical system or closes the aperture unit. The surface on the lamp side of the shutter unit or diaphragm is processed to reflect heat emitted from the lamp and reflect it toward the lamp body. The shutter unit reflected heat can raise the temperature of the lamp body without the heat of the lamp escaping through the lens. Therefore, immediately after the lamp is turned on, the temperature of the lamp rises quickly, the mercury and halogen conditions inside the lamp are stabilized, the lamp life is sacrificed, and the time until the lamp is turned off is compatible.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a projection apparatus according to an embodiment of the present invention.

  Hereinafter, a projection apparatus according to a first embodiment of the present invention will be described with reference to FIG.

  The projection apparatus shown in FIG. 1 has a high-pressure mercury lamp as a light source, and the light can project various images on a screen (not shown) through an image panel. The projected image is input from an image output device (not shown). The image output device is a PC, a video disk player, or the like, and various images are input such as digital signal DVI, HDMI (registered trademark), and analog signal NTSC.

  Each element will be described below.

  FIG. 1 is a block diagram of the projection apparatus of the present invention.

  Reference numeral 1 denotes a projection apparatus according to the present invention, which is characterized in that the lamp can be turned off in the shortest time without impairing the lamp life even if the lamp is stopped immediately after the lamp is turned on.

  An optical unit 2 is a box-like object that holds a high-pressure mercury lamp 3, an image panel 4, a shutter 5, and the like. The mercury lamp 3 can be cooled.

  The shutter 5 is a device that can be disposed so as to block the optical path of the lamp 3 by driving the shutter motor 9, and can efficiently return the light and heat of the lamp 3 to the lamp 3.

  The CPU 8 is a central processing unit capable of arbitrarily controlling the shutter motor 9 and the fan driver 10 and is a device capable of various determinations and operations. Further, a memory 11 having various setting information and adjustment information is connected, so that necessary information can be obtained. The shutter motor 9 can drive the shutter 5 under the control of the CPU 8.

  Reference numeral 12 denotes an external input, and a wide variety of videos are input from an image output device (not shown). The input video passes through the external input 12, is converted into an appropriate resolution by the video processing panel 4 of the projection apparatus 1 by the image processing IC 13, and then sent to the panel driver 14. The sent signal drives the video panel device 4 by the panel driver 14.

  The image panel 4 is composed of three sheets for each of the three primary colors of red, blue, and green light, and the light that has passed through each panel is combined by the optical system 15 and sent to the lens 16 for projection.

  In order to project the image on the video panel 4, the lamp 3 needs to emit light. For this purpose, the ballast device 17 is supplied with power from the external power input 18.

  The external power supply input 18 obtains commercial power from an external AC power supply (not shown) and supplies direct current of various voltages to the ballast device 17 and other parts.

  Reference numeral 19 denotes a control panel which is connected to the CPU 8 and inputs operation information, which can transmit the operator's intention to the projection apparatus 1 such as turning on / off the power supply or selecting an input signal.

  The operation of the projection apparatus configured as described above will be described below.

  FIG. 2 is a flowchart showing the operation of the projection apparatus of the present invention.

  In the projection apparatus 1 configured as described above, the CPU 8 receives a lighting command from the control panel 19 and activates the ballast device 17 to turn on the lamp 3 in S201. Also, the video signal from the external input 12 is converted into an appropriate resolution for the video panel 4 by the image processing IC 13 and sent to the panel driver 14, the panel 4 is driven, and the video is projected by the light of the lamp 3.

  When the lamp 3 is turned on and projection of an image is started, the process proceeds to S202, and monitoring of whether a turn-off command is input from the control panel 19 is started.

  When monitoring is started, the process proceeds to S203 to continue monitoring whether there is a turn-off command.

  If a turn-off command is input from the control panel 19, the process proceeds to S204, and the CPU 8 determines whether the lamp temperature has sufficiently increased in the time since the lamp is turned on, or whether it has not yet reached a temperature that can be turned off.

  If it is determined that the temperature rise is sufficient, the process proceeds to S205, and after the lamp 3 is turned off, the process proceeds to S206. The CPU 3 controls the intake motor 6 and the exhaust motor 7 to perform the cooling operation.

  If it is determined that the temperature has not risen sufficiently and the temperature has not been extinguished, the process proceeds to S207, and the CPU 8 operates the shutter motor 9 to insert the shutter 5 into the optical unit 2. The inserted shutter 5 enters the projection surface of the lamp 3 to efficiently reflect the heat of the lamp 3 and efficiently raise the temperature of the lamp 3.

  After operating the shutter in S207, the process proceeds to S208, and the CPU 8 obtains information on the shutter input time derived from the time from the lighting of the lamp 3 stored in the memory 11, and proceeds to S209.

  In S209, counting of the time obtained in S208 is started, and the process proceeds to S210.

  In S210, the CPU 3 counts the necessary time and proceeds to S211.

  In S211, after the lamp 3 is turned off, the process proceeds to S212, and the CPU 3 controls the intake motor 6 and the exhaust motor 7 to perform a cooling operation.

  The projection device 1 controlled as described above analyzes whether the lamp temperature rise is sufficient in the time from the lamp lighting and determines that the lamp temperature rise is insufficient, and drives the shutter 5 with the shutter motor 9. Insert into the optical unit 2.

  The shutter 5 introduced into the optical system 15 efficiently returns the heat from the lamp 3 to the lamp 3 and accelerates the temperature rise of the lamp 3.

  By performing the operation as described above, the temperature of the lamp 3 can be increased rapidly, and the vaporization state of the internal mercury is unstable due to the low temperature, so that the lamp cannot be turned off immediately after lighting. It can be finished in time.

  Therefore, even if the user orders to turn off immediately after lighting, it is possible to minimize waiting for the lamp temperature to rise sufficiently, and to avoid the possibility that the inside of the lamp will turn off while being unstable. This makes it possible to extend the life of the lamp.

  A projection apparatus according to the second embodiment of the present invention will be described below with reference to FIG.

  The projection apparatus shown in FIG. 3 has a high-pressure mercury lamp as a light source, and the light can project various images on a screen (not shown) through an image panel. The projected image is input from an image output device (not shown). The image output device is a PC, a video disc player, or the like, and various images are input such as DVI and HDMI of digital signals and NTSC of analog signals.

  Each element will be described below.

  FIG. 3 is a block diagram of the projection apparatus of the present invention.

  Reference numeral 1 denotes a projection apparatus according to the present invention, which is characterized in that the lamp can be turned off in the shortest time without impairing the lamp life even if the lamp is stopped immediately after the lamp is turned on.

  An optical unit 2 is a box-like object that holds a high-pressure mercury lamp 3, an image panel 4, a shutter 5, and the like. The mercury lamp 3 can be cooled.

  The shutter 5 is a device that can be disposed so as to block the optical path of the lamp 3 by driving the shutter motor 9, and can efficiently return the light and heat of the lamp 3 to the lamp 3.

  The CPU 8 is a central processing unit capable of arbitrarily controlling the shutter motor 9 and the fan driver 10 and is a device capable of various determinations and operations. Further, a memory 11 having various setting information and adjustment information is connected, so that necessary information can be obtained.

  Reference numeral 20 denotes a temperature sensor that can measure the lamp temperature and notify the CPU 8 of the lamp temperature.

  The shutter motor 9 can drive the shutter 5 under the control of the CPU 8.

  Reference numeral 12 denotes an external input, and various types of video are input from an image output device (not shown). The input video passes through the external input 12, is converted into an appropriate resolution by the video processing panel 4 of the projection apparatus 1 by the image processing IC 13, and then sent to the panel driver 14. The sent signal drives the video panel device 4 by the panel driver 14.

  The image panel 4 is composed of three sheets for each of the three primary colors of red, blue, and green light, and the light that has passed through each panel is combined by the optical system 15 and sent to the lens 16 for projection.

  In order to project the image on the video panel 4, the lamp 3 needs to emit light. For this purpose, the ballast device 17 is supplied with power from the external power input 18.

  The external power supply input 18 obtains commercial power from an external AC power supply (not shown) and supplies direct current of various voltages to the ballast device 17 and other parts.

  Reference numeral 19 denotes a control panel which is connected to the CPU 8 and inputs operation information, which can transmit the operator's intention to the projection apparatus 1 such as turning on / off the power supply or selecting an input signal.

  The operation of the projection apparatus configured as described above will be described below.

  FIG. 4 is a flowchart showing the operation of the projection apparatus of the present invention.

  In the projection apparatus configured as described above, in S401, the CPU 8 receives a lighting command from the control panel 19 and activates the ballast device 17 to turn on the lamp 3. Also, the video signal from the external input 12 is converted into an appropriate resolution for the video panel 4 by the image processing IC 13 and sent to the panel driver 14, the panel 4 is driven, and the video is projected by the light of the lamp 3.

  When the lamp 3 is turned on and image projection starts, the process proceeds to S <b> 402 to start monitoring whether a turn-off command is input from the control panel 19.

  When monitoring is started, the process proceeds to S403 to continue monitoring whether there is a turn-off command.

  If a turn-off command is input from the control panel 19, the process proceeds to S404, and the CPU 8 measures the lamp temperature using the temperature sensor 20, and then proceeds to S405.

  In S <b> 405, the CPU 8 determines from the information of the temperature sensor 20 whether the lamp temperature has risen sufficiently or has not yet reached a temperature at which it can be turned off.

  If it is determined that the temperature rise is sufficient, the process proceeds to S406, and after the lamp 3 is turned off, the process proceeds to S407. The CPU 3 controls the intake motor 6 and the exhaust motor 7 to perform the cooling operation.

  If it is determined that the temperature has not risen sufficiently and has not reached the temperature at which it can be turned off, the process proceeds to S408, and the CPU 8 operates the shutter motor 9 to put the shutter 5 into the optical unit 2.

  The inserted shutter 5 enters the projection surface of the lamp 3 to efficiently reflect the heat of the lamp 3 and efficiently raise the temperature of the lamp 3.

  After operating the shutter in S408, the process proceeds to S409, and the CPU 8 continues monitoring until the temperature information of the temperature sensor 20 reaches a temperature at which the light can be turned off. If it is determined that the temperature can be turned off, the process proceeds to S410.

  In S410, after the lamp 3 is turned off, the process proceeds to S411, and the CPU 3 controls the intake motor 6 and the exhaust motor 7 to perform a cooling operation.

  The projection device 1 controlled as described above analyzes whether the lamp temperature rise is sufficient based on the information from the temperature sensor 20 and determines that the lamp temperature rise is insufficient, and drives the shutter 5 with the shutter motor 6. Into the optical unit 2.

  The shutter 5 introduced into the optical system 15 efficiently returns the heat from the lamp 3 to the lamp 3 and accelerates the temperature rise of the lamp 3.

  By performing the operation as described above, the temperature of the lamp 3 can be increased rapidly, and the vaporization state of the internal mercury is unstable due to the low temperature, so that the lamp cannot be turned off immediately after lighting. It can be finished in time.

  Therefore, even if the user commands turning off immediately after turning on, it is possible to avoid waiting for the lamp temperature to rise sufficiently, and to avoid turning off the lamp while it is unstable. It is possible to extend the life of the lamp.

1 Projector, 2 Optical unit, 3 High pressure mercury lamp, 4 Video panel,
5 Shutter, 6 Intake fan motor, 7 Exhaust fan motor,
8 CPU (Central Processing Unit), 9 Shutter Motor, 10 Fan Driver,
11 Memory, 12 External input, 13 Image input IC, 14 Panel driver,
15 optical system, 16 lens, 17 ballast, 18 external power input, 19 operation panel,
20 Temperature sensor

Claims (9)

In the projection device,
A lamp device for generating light;
Means for returning heat from the lamp to the lamp;
Means for driving the means;
Means for determining to drive the drive means;
A projection apparatus characterized by raising a lamp temperature. In the projection device,
A lamp device for generating light;
Means for returning heat from the lamp to the lamp using a shutter;
Means for driving the shutter;
Means for determining to drive the drive means;
A projection apparatus characterized by raising a lamp temperature. In the projection device,
A lamp device for generating light;
Means for returning heat from the lamp to the lamp;
Means for driving the means;
Means for determining to drive the drive means;
A projection apparatus characterized in that a lamp temperature can be quickly raised immediately after lighting and the lamp can be turned off in a short time without impairing the lamp life. In the projection device,
A lamp device for generating light;
Means for returning heat from the lamp to the lamp using a diaphragm;
Means for driving the diaphragm;
Means for determining to drive the drive means;
A projection apparatus characterized by raising a lamp temperature. 3. The projection apparatus according to claim 2, wherein the shape of the means for returning the heat from the lamp to the lamp using a shutter is conical to return the light efficiently. 3. The projection apparatus according to claim 2, wherein a mirror-finished metal is used as a material of means for returning heat from the lamp to the lamp using a shutter. The projection apparatus according to claim 1, wherein the passage of time is used for the determination of the means for determining. The projection apparatus according to claim 1, wherein a temperature is used for the determination of the determining unit. The projection apparatus according to claim 1, wherein information on light from a lamp is used for the determination by the determining unit.