JP2007218948A - Projection type display apparatus and control method thereof - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection type display apparatus which precisely informs of a light source to be replaced, and the position of the light source to be replaced, and also to provide a control method of the apparatus. <P>SOLUTION: When a power source key on a control panel 31 is operated while a lamp unit 40 is turned on, a control part 30 gives a lamp driving part 35 an instruction to turn off the light, and also, updates the accumulated lighting time of the lamp unit 40 by a counting part 30a. When the power supply to the lamp unit 40 is stopped and the lamp unit 40 is turned off by the lamp driving part 35, in reply to the instruction given by the control part 30, the control part 30 compares the updated accumulated lighting time with a standard replacement time, and judges whether the accumulated lighting time exceeds the standard replacement time. When judging that the accumulated lighting time exceeds the standard replacement time based on the comparison result, an instruction to energize a solenoid 50 is given to a solenoid driving part 30 so as to open a lamp cover. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a projection display apparatus that modulates light emitted from a light source according to image data and projects an image on a screen or the like, and a control method therefor.

  In a discharge type light source lamp such as an ultra-high pressure mercury lamp or a metal halide lamp used as a light source of a projection display device, the luminance gradually decreases as usage time (lighting time) is accumulated. If you continue to use it for a long time, the visibility of the image will be lost due to the decrease in brightness, and the lamp will be easily damaged, so a new light source lamp (lamp unit) must be installed before such symptoms appear. It is desirable to replace it with something. For this reason, there has been proposed a projection display apparatus that displays a message prompting lamp replacement on a projected image when a time that is a guide for lamp replacement has elapsed (see, for example, Patent Document 1).

JP 2000-267061 A

  However, users who are unfamiliar with the handling of devices often leave the message as it is without knowing the place where the light source lamp is mounted, as well as the replacement method, even if the above message is displayed. For this reason, it is impossible to display an image with an appropriate brightness by continuing to use it as it is, and in addition, the user is further confused when the lamp is damaged during image viewing. Had.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a projection display apparatus capable of clearly informing that the light source should be replaced and the position of the light source to be replaced, and its control. It is to provide a method.

  A projection display device according to the present invention includes a replaceable light source, a light modulation device that modulates light emitted from the light source according to image data, and an enlarged projection of the light modulated by the light modulation device. Measured by the projection optical system, the light source, the light modulation device, a housing for housing the apparatus main body including the projection optical system, a time measuring unit for measuring the cumulative lighting time of the light source, and the time measuring unit. A determination unit that determines whether or not the light source is to be replaced based on the cumulative lighting time; and the light source when the determination unit determines that the light source is to be replaced, or A cover member that closes a portion in which the light source is accommodated is provided with a protruding portion that protrudes from the housing.

  According to this projection display apparatus, when the determination unit determines that the light source should be replaced, the projecting portion protrudes the light source or its cover member from the housing, so that the user replaces the light source. And the position of the light source to be replaced can be easily known.

  In the projection display device, it is preferable that the protruding portion protrudes the light source or the cover member when the light source is turned off.

  According to this projection display apparatus, since the projecting portion projects the light source and the cover member while the light source is turned off, they do not project during the viewing of the image, and the viewing of the image is not hindered.

  In the projection display apparatus, it is preferable that the light source includes a storage unit that stores the cumulative lighting time measured by the time measuring unit.

  According to this projection display apparatus, since the storage unit for storing the cumulative lighting time is provided in the light source, it is possible to know the usage history of the newly mounted light source on the main body side. As a result, regardless of the usage history of the newly mounted light source, it is possible to know the replacement time more accurately, and it is possible to project the light source or the cover member at an appropriate time.

  The projection display device control method of the present invention is a method for controlling the projection display device, wherein the cumulative lighting time stored in the storage unit when the light source is inserted into the housing. In a first step of reading out, a second step of determining whether the light source is already in a state to be replaced based on the read out cumulative lighting time, and in the second step, And a third step of suspending the projection of the cover member that closes the light source or the part in which the light source is accommodated when it is determined that the state should already be replaced. .

  According to the control method of the projection display apparatus, when a light source that has already been replaced is inserted, the projection operation of the light source and the cover member is delayed for a predetermined time. It becomes possible. As a result, it is possible to avoid a situation in which an image cannot be viewed even under circumstances where it is difficult to replace the light source, such as when there is no new light source.

  Further, when the above-described projection display apparatus and its control method are constructed using a computer provided in the projection display apparatus, the present invention provides a program for realizing the function, or the program. It is also possible to configure in the form of a recording medium or the like that is recorded so as to be readable by the computer. As recording media, flexible disks, CD-ROMs, magneto-optical disks, IC cards, ROM cartridges, punch cards, printed matter on which codes such as barcodes are printed, projector internal storage devices (memory such as RAM and ROM), Various media that can be read by the computer, such as an external storage device, can be used.

(First embodiment)
Hereinafter, a projection display apparatus according to a first embodiment of the present invention will be described with reference to the drawings.
1 and 2 are perspective views showing a projector as a projection display device.
As shown in both figures, the projector 1 has a configuration surrounded by a housing 2 including a front case 21 covering the front surface, an upper case 22 covering the upper surface, a lower case 23 covering the bottom surface, and the like. A projection lens 160 that projects an image (optical image) is exposed on the front surface of the housing 2, and a connection terminal (not shown) to which image data is input from an external image supply device is exposed on the rear surface of the housing 2. Is provided.

  An operation panel 31 and a lamp cover 24 are provided on the upper surface of the housing 2. The operation panel 31 includes a plurality of keys such as a power key for turning on / off the power, a menu key for combining and displaying menu images, and a source key for switching input sources. Various instructions can be given to the projector 1 by operating each key on the operation panel 31.

  The lamp cover 24 is a substantially rectangular cover member and protects the lamp unit 40 as a light source provided in the housing 2. Further, a hinge mechanism (not shown) is formed on one end side of the lamp cover 24 with the upper case 22 so that the lamp cover 24 can be opened by lifting the other end (open end) side. ing. When the lamp cover 24 is opened, the concave lamp housing portion 4 formed in the housing 2 is exposed, and the lamp unit 40 mounted on the lamp housing portion 4 can be replaced.

FIG. 3 is a plan view showing a schematic configuration of the lamp unit 40, and is a view of the lamp unit 40 as viewed from the bottom surface side (side facing the bottom surface of the lamp housing portion 4). FIG. 4 is a plan view of the projector 1 with the lamp cover 24 opened as viewed from the upper surface side.
As shown in FIG. 3, the lamp unit 40 has a light source lamp 41 composed of a discharge type light source lamp such as an ultra-high pressure mercury lamp or a metal halide lamp. In addition, a reflector 42, a front glass 43, a connector 44, a housing The member 45 etc. are provided. The reflector 42 includes a concave reflecting surface 42a formed in a spheroid shape or a rotating paraboloid shape, and the light from the light source lamp 41 provided so as to be surrounded by the reflecting surface 42a is used as the opening end 42b. Reflect toward the side. A front glass 43 for protecting the light source lamp 41 is attached to the opening end 42 b of the reflector 42. The connector 44 is a connection terminal for supplying power to the light source lamp 41. When the lamp unit 40 is attached to the lamp housing portion 4 of the projector 1, the connector 5 (on the main body side provided on the bottom surface of the lamp housing portion 4 ( (See FIG. 4). The housing member 45 is a box-like body that forms the outer wall of the lamp unit 40, and supports and protects the reflector 42 and the connector 44 with the light source lamp 41 and the front glass 43 attached thereto.

  As shown in FIGS. 1, 2, and 4, the lamp cover 24 has a larger outer shape than the lamp housing portion 4 in a plan view from the upper surface side (see FIG. 4), and the lamp cover 24 is closed. The peripheral edge of the back surface of the lamp cover 24 comes into contact with the bottom surface 25 a of the recess 25 formed in the upper case 22 so as to surround the lamp housing portion 4. The depth of the recess 25 is substantially the same as the thickness of the lamp cover 24, and the surface of the lamp cover 24 in the closed state (see FIG. 1) is substantially flush with the surface of the upper case 22. To position.

  The left and right ends of the lamp cover 24 are provided with plate-like holding members 26 that protrude toward the back side of the lamp cover 24, and the bottom surface 25 a of the recess 25 is penetrated to engage with the holding member 26. A hole 27 is formed. As shown in FIG. 4, the recess 25 is provided with a push-type solenoid 50 for opening the lamp cover 24 at a position corresponding to the approximate center on the open end side of the lamp cover 24. The solenoid 50 causes the lamp cover 24 to protrude from the housing 2 by the raising operation of the plunger 51, and corresponds to a protruding portion of the present invention.

FIGS. 5A to 5C are explanatory views for explaining the holding structure of the lamp cover 24, and are sectional views showing the peripheral structure of the holding member 26 of the lamp cover 24.
As shown in FIGS. 5A to 5C, a hemispherical convex portion 26 a that protrudes outward is formed on the distal end side of the outer surface of the holding member 26. The convex portion 26a is locked to the lower end 27b of the outer wall portion 27a of the through hole 27 when the lamp cover 24 is closed, so that the lamp cover 24 is not easily opened (by a weak force). (See FIG. 5 (a)). Here, when a predetermined force or more is applied upward to the open end of the lamp cover 24, the front end side of the holding member 26 bends inward, so that the holding member 26 can move in the through hole 27. The lamp cover 24 can be raised (see FIG. 5B). When the lamp cover 24 is further raised to expose the convex portion 26a on the surface of the upper case 22, the bending of the holding member 26 is restored, and the tip of the convex portion 26a is the inner wall surface 27c (the concave portion 25) of the through hole 27. Projecting outward from the inner wall surface. Therefore, in this state, even if a weak force of about its own weight acts downward on the lamp cover 24, the convex portion 26a contacts the surface of the upper case 22, so the lamp cover 24 does not naturally close. The half-open state is maintained (see FIG. 5C). That is, even when the lamp cover 24 is closed, it is necessary to apply a force of a predetermined level or more in order to bend the holding member 26.

FIGS. 6A and 6B are side sectional views of the periphery of the lamp housing portion 4, wherein FIG. 6A shows a state in which the lamp cover 24 is closed, and FIG. 6B shows a state in which the lamp cover 24 is opened. ing.
As shown in FIGS. 6A and 6B, the solenoid 50 is disposed on the back side of the bottom surface 25 a of the recess 25 formed in the upper case 22 and at a position corresponding to the open end side portion of the lamp cover 24. ing. A through hole 28 is formed in the bottom surface 25 a of the recess 25, and the plunger 51 of the solenoid 50 can move up and down through the through hole 28. For this reason, when the solenoid 50 is energized, the plunger 51 moves upward, and the open end of the lamp cover 24 is moved until the convex portion 26a (see FIG. 5) of the holding member 26 is exposed on the surface of the upper case 22. Push up. As a result, as shown in FIG. 5B, the lamp cover 24 is in a half-open state. Thereafter, when the energization to the solenoid 50 is stopped, the plunger 51 moves downward due to its own weight, but the convex portion 26a of the holding member 26 is engaged with the surface of the upper case 22 as shown in FIG. Since it is stopped, the lamp cover 24 is maintained in a half-open state.

FIG. 7 is a block diagram illustrating a schematic configuration of the projector 1.
As shown in FIG. 7, the projector 1 includes an image projection unit 10 that projects an image, a control unit 30, the above-described operation panel 31, an image data conversion unit 32, an image data processing unit 33, and a light valve. The driving unit 34, the lamp driving unit 35, the solenoid driving unit 36, and the solenoid 50 described above are included.

First, the image projection unit 10 will be described. The image projection unit 10 includes the lamp unit 40 described above, three liquid crystal light valves 140R, 140G, and 140B, the projection lens 160 described above, and the like.
FIG. 8 is a configuration diagram showing the configuration of the image projection unit 10 in more detail, and shows an optical path from the light emitted from the lamp unit 40 to the screen SC.
As shown in FIG. 8, the image projection unit 10 includes an illumination optical system 110, a color light separation optical system 120, a relay optical system 130, three liquid crystal light valves 140R, 140G, and 140B as light modulation devices, and a cross A dichroic prism 150 and a projection lens 160 as a projection optical system are provided.

  The illumination optical system 110 includes a lamp unit 40, a first lens array 111, a first reflection mirror 112, a second lens array 113, a polarization conversion element 114, and a superimposing lens 115. The beam bundle emitted from the lamp unit 40 is divided into a large number of minute beam bundles by the first lens array 111 in which minute lenses 111a are arranged in a matrix, and then reflected by the first reflecting mirror 112. Then, the light enters the second lens array 113. The second lens array 113 and the superimposing lens 115 are provided such that each of the divided light bundles irradiates the entire three liquid crystal light valves 140R, 140G, and 140B that are illumination targets. For this reason, the light beams are superimposed by the liquid crystal light valves 140R, 140G, and 140B, and the entire liquid crystal light valves 140R, 140G, and 140B are illuminated almost uniformly.

  The polarization conversion element 114 has a function of aligning polarized light having a specific polarization direction so that the light from the lamp unit 40 can be efficiently used by the liquid crystal light valves 140R, 140G, and 140B. The polarized light emitted from the illumination optical system 110 enters the color light separation optical system 120.

  The color light separation optical system 120 includes a first dichroic mirror 121, a second reflection mirror 122, and a second dichroic mirror 123, and the light emitted from the illumination optical system 110 has a different wavelength range. Separate into three colors of light. The first dichroic mirror 121 reflects substantially red light and transmits light having a shorter wavelength than the reflected light. The red light R reflected by the first dichroic mirror 121 is further reflected by the second reflection mirror 122 to illuminate the liquid crystal light valve 140R for red light.

  Of the light transmitted through the first dichroic mirror 121, the green light G is reflected by the second dichroic mirror 123 and illuminates the liquid crystal light valve 140G for green light. Further, the blue light B passes through the second dichroic mirror 123, passes through the relay optical system 130, and illuminates the liquid crystal light valve 140B for blue light.

  Since the path of the blue light B is longer than the paths of the other color lights, the blue light B is used to prevent the illumination efficiency to the liquid crystal light valve 140B from being lowered due to the divergence of the light beam. The relay optical system 130 is provided in the path of. The relay optical system 130 includes an incident side lens 131, a third reflection mirror 132, a relay lens 133, a fourth reflection mirror 134, and an emission side lens 135. The blue light B emitted from the color light separation optical system 120 is converged in the vicinity of the relay lens 133 by the incident side lens 131 and diverges toward the emission side lens 135.

  Each of the liquid crystal light valves 140R, 140G, and 140B includes a liquid crystal panel 141 in which liquid crystal is sealed between a pair of transparent substrates, and the inner surface of the liquid crystal panel 141 is provided for each minute region (pixel) with respect to the liquid crystal. Transparent electrodes (pixel electrodes) to which a driving voltage can be applied are formed in a matrix. Further, an incident-side polarizing plate 142 and an emitting-side polarizing plate 143 are attached to the incident-side surface and the exit-side surface of the liquid crystal panel 141, respectively. The incident-side polarizing plate 142 and the exit-side polarizing plate 143 can transmit only polarized light having a specific polarization direction, and the incident-side polarizing plate 142 transmits polarized light having the polarization direction aligned by the polarization conversion element 114. It is possible. For this reason, most of each color light irradiated to the liquid crystal light valves 140R, 140G, and 140B passes through the incident-side polarizing plate 142 and enters the liquid crystal panel 141.

  Here, when a driving voltage corresponding to image data is applied to each pixel of the liquid crystal panel 141, the light incident on the liquid crystal panel 141 is modulated according to the driving voltage and has a different polarization direction for each pixel. It becomes polarized light. Of this polarized light, only the polarization component that can be transmitted through the exit-side polarizing plate 143 is emitted from the liquid crystal light valves 140R, 140G, and 140B. That is, the liquid crystal light valves 140R, 140G, and 140B transmit incident light with different transmittances for each pixel according to image data, so that an optical image having a gradation is formed for each color light. Optical images made up of the respective color lights emitted from the liquid crystal light valves 140R, 140G, and 140B are incident on the cross dichroic prism 150.

  The cross dichroic prism 150 combines the optical images of the respective colors emitted from the liquid crystal light valves 140R, 140G, and 140B for each pixel to form an optical image representing a color image. The optical image synthesized by the cross dichroic prism 150 is enlarged and projected on the screen SC by the projection lens 160 and displayed as an image.

  Returning to FIG. 7, the control unit 30 includes a CPU (Central Processing Unit), a ROM including a rewritable nonvolatile memory such as a flash ROM (Read Only Memory), and a RAM (Random Access) used for temporary storage of various data. Memory) and other electric circuits (not shown) and function as a computer. The control unit 30 performs overall control of the operation of the projector 1 by the CPU operating according to a control program stored in the ROM. The ROM stores various setting values in addition to the control program.

  The operation panel 31 is for giving various instructions to the projector 1 as described above. When the user operates the operation panel 31, the operation panel 31 sends an operation signal corresponding to the operation content of the user to the control unit. Output to 30. Instead of the operation panel 31 or together with the operation panel 31, a remote control (not shown) capable of remote operation may be provided. In this case, the remote controller emits an infrared operation signal corresponding to the operation content of the user, and a remote control signal receiving unit (not shown) receives this and transmits it to the control unit 30.

  The image data conversion unit 32 can input image data of various formats from an external image supply device (image reproduction device, personal computer, etc.) (not shown), and the input image data is used as an instruction from the control unit 30. Based on this, it is converted into image data in a format that can be processed by the image data processing unit 33 and output to the image data processing unit 33.

  Based on an instruction from the control unit 30, the image data processing unit 33 performs resolution conversion, luminance adjustment, and adjustment of the resolution of the input image data to the resolution (number of pixels) of the liquid crystal light valves 140 R, 140 G, and 140 B. Various image quality adjustments such as contrast adjustment and sharpness adjustment, or processing for synthesizing OSD (on-screen display) images such as menus and messages, and the processed image data are output to the light valve drive unit 34. The light valve driving unit 34 drives the liquid crystal light valves 140R, 140G, and 140B based on the image data.

  The lamp driving unit 35 is connected to the lamp unit 40 via the connectors 5 and 44 described above, and drives the lamp unit 40. Specifically, the lamp unit 40 is turned on or off by supplying or stopping power supply to the lamp unit 40 based on an instruction from the control unit 30. The solenoid drive unit 36 drives the solenoid 50 described above, and energizes the solenoid 50 and stops it based on an instruction from the control unit 30.

  Here, the control unit 30 is provided with a time measuring unit 30 a, which can measure the cumulative lighting time of the lamp unit 40 and store the measurement result in the ROM in the control unit 30. Specifically, the time measuring unit 30a measures the time from when the control unit 30 instructs the lamp driving unit 35 to turn on the lamp unit 40 until it instructs the lamp unit 40 to turn off, and calculates the accumulated lighting time stored in the ROM. The measured lighting time is added, and the cumulative lighting time after the addition is stored in the ROM to update the cumulative lighting time. When the user performs a predetermined operation using the operation panel 31, the control unit 30 instructs the image data processing unit 33 to use the accumulated lighting time stored in the ROM as an OSD image (for example, on the menu). As a single item) and displayed on the projected image. When the user performs an operation for resetting the cumulative lighting time using the operation panel 31, the control unit 30 stores a value of 0 as the cumulative lighting time in the ROM.

  The ROM of the control unit 30 stores an approximate replacement time for the lamp unit 40. The reference replacement time is a time used as a guide for replacement of the lamp unit 40, and is set to a time (for example, 2000 hours) in which the lamp unit 40 can be used in a substantially appropriate state. Therefore, the control unit 30 determines whether or not the lamp unit 40 is to be replaced by determining whether or not the cumulative lighting time has exceeded the replacement guide time.

Next, the operation of the projector 1 will be described.
FIG. 9 is a flowchart for explaining the operation of the projector 1 when the lamp unit 40 is turned off.
When the user finishes viewing the projected image and operates the power key of the operation panel 31 to turn off the lamp unit 40, the control unit 30 operates according to the flowchart.

  As shown in FIG. 9, when the power key is operated, the control unit 30 instructs the lamp driving unit 35 to turn off the light (step S201) and updates the cumulative lighting time by the time measuring unit 30a ( Step S202). When the lamp driving unit 35 stops supplying power to the lamp unit 40 according to an instruction from the control unit 30 and the lamp unit 40 is turned off, the control unit 30 compares the updated accumulated lighting time with the replacement guide time. Then, it is determined whether or not the cumulative lighting time exceeds the replacement guide time (step S203). As a result, if the replacement guide time is exceeded, the solenoid drive unit 36 is instructed to energize the solenoid 50 (step S204).

  When the solenoid drive unit 36 energizes the solenoid 50 in accordance with an instruction from the control unit 30, the plunger 51 protrudes to open the lamp cover 24. As a result, the lamp cover 24 is in a half-open state and protrudes from the upper surface of the housing 2, so that the user can recognize that the lamp unit 40 should be replaced. Thereafter, the user replaces the lamp unit 40, closes the lamp cover 24, and performs an operation for resetting the cumulative lighting time by the operation panel 31, so that the cumulative lighting time of the new lamp unit 40 can be accurately determined from the next time. It becomes possible to measure.

  Note that comparing the updated cumulative lighting time with the replacement guide time and determining whether the cumulative lighting time exceeds the replacement guide time (step S203) is a state in which the lamp unit 40 should be replaced. Therefore, the control unit 30 that performs this process corresponds to the determination unit of the present invention.

As described above, according to the projector 1 of the present embodiment, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, when the control unit 30 determines that the lamp unit 40 is to be replaced, the solenoid 50 causes the lamp cover 24 to protrude from the housing 2. It is possible to easily know that the lamp unit 40 should be replaced and the position where the lamp unit 40 to be replaced is accommodated (the position of the lamp accommodating portion 4). Further, since the lamp cover 24 is half opened by the solenoid 50, it is possible to easily remove the lamp unit 40.

  (2) According to the projector 1 of the present embodiment, since the lamp cover 24 protrudes only when the lamp unit 40 is turned off, the lamp cover 24 does not protrude during image viewing, and image viewing is hindered. You do n’t have to.

(Second Embodiment)
Hereinafter, a projection display apparatus according to a second embodiment of the present invention will be described with reference to the drawings.
10A and 10B are side sectional views showing a projector as a projection display apparatus according to this embodiment.
As shown in FIGS. 10A and 10B, the projector 1 according to the present embodiment has a lamp housing portion 4 that is open on the back side of the housing 2, and the lamp unit 40 can be replaced from the back side. To do. Further, the lamp cover 24 is not provided, and when the lamp unit 40 is mounted, the lamp unit 40 is exposed from the back surface.

  The lamp unit 40 has the same configuration as that of the first embodiment, and the lamp unit 40 is positioned so that the bottom surface of the lamp unit 40 faces the inner wall surface 4a on the back side of the lamp storage unit 4. Is inserted into the connector 44, the connector 44 of the lamp unit 40 is connected to the connector 5 provided on the inner wall surface 4a. A plurality of push-type solenoids 50 are disposed on the further inner side of the inner wall surface 4a. The plunger 51 of each solenoid 50 is movable in the horizontal direction. When the solenoid drive unit 36 energizes the solenoid 50, the plunger 51 protrudes and does not drop the lamp unit 40 from the housing 2. Can be extruded.

  The configuration other than the above is the same as that in the first embodiment, and FIG. 7 and FIG. 9 can be referred to for the block diagram and the operation flow when the light is turned off, respectively. That is, if the cumulative lighting time exceeds the replacement guide time, the control unit 30 instructs the solenoid drive unit 36 to instruct energization of the solenoid 50. In response to this, when the solenoid drive unit 36 energizes the solenoid 50, the plunger 51 protrudes to push out the lamp unit 40 and cause the lamp unit 40 to protrude from the back surface of the housing 2. Thereby, the user can recognize that the lamp unit 40 should be replaced.

  As described above, according to the projector 1 of the present embodiment, the same effect as that of the first embodiment can be obtained.

(Third embodiment)
Hereinafter, a projection display apparatus according to a third embodiment of the present invention will be described with reference to the drawings.
FIG. 11 is a block diagram showing a schematic configuration of a projector as a projection display apparatus according to the present embodiment.

  As shown in FIG. 11, the projector 1 of the present embodiment has substantially the same configuration as that of the second embodiment. When the cumulative lighting time exceeds the replacement guide time, the solenoid 50 causes the lamp unit 40 to be placed on the back surface. The lamp unit 40 according to the present embodiment includes a storage unit 46 formed of a rewritable nonvolatile memory such as a flash ROM.

  The storage unit 46 is for storing the cumulative lighting time of the lamp unit 40 instead of the ROM in the control unit 30 in the first embodiment, and a value of 0 is written initially (at the time of shipment). It is. Further, the control unit 30 can read and rewrite (update) the accumulated lighting time stored in the storage unit 46 through the connectors 5 and 44. For this reason, the timing unit 30a of the control unit 30 measures the time from when the control unit 30 instructs the lamp driving unit 35 to turn on the lamp unit 40 until it instructs the lamp unit 40 to turn off, and then is stored in the storage unit 46. The accumulated lighting time is read out, and the measured lighting time is added thereto, and the cumulative lighting time after the addition is stored in the storage unit 46 to update the cumulative lighting time.

  As described above, since the cumulative lighting time is stored in the storage unit 46, the control unit 30 can determine whether the lamp unit 40 is new or used when the lamp unit 40 is mounted in the lamp housing 4. The usage history of the lamp unit 40 can be known.

  Here, in step S204 in FIG. 9, when the lamp unit 40 that has exceeded the replacement guide time is pushed out, the user needs to replace it with a new lamp unit 40 accordingly. However, in this embodiment, when it is desired to postpone the replacement work because a new lamp unit 40 has not been prepared, the lamp unit 40 can be used again by reattaching the extruded lamp unit 40. It can be extended.

  FIG. 12 is a flowchart for explaining the operation when the lamp unit 40 is mounted in the lamp housing portion 4, and shows the operation process after the flow (steps S201 to S204) shown in FIG. 9 is finished. Yes. It is assumed that 2000 hours is stored in the ROM of the control unit 30 as a replacement guide time.

  As shown in FIG. 12, when the lamp unit 40 is mounted in the lamp housing unit 4, the control unit 30 reads the cumulative lighting time from the storage unit 46 of the lamp unit 40 (step S211), and the replacement guide time (2000). It is determined whether or not (time) is exceeded (step S212). Here, when the replacement guide time (2000 hours) has been exceeded, it is determined that the pushed lamp unit 40 is mounted again, and a predetermined extension time (for example, for example, the initial replacement guide time (2000 hours)) is determined. The 2100 hours obtained by adding (100 hours) is stored in the ROM as a new replacement guide time (step S213), and the process is terminated. Thereafter, in step S203 (see FIG. 9) in the flow when the lamp unit 40 is turned off, it is determined whether or not the replacement guide time after extension (2100 hours) has been exceeded. The use of the lamp unit 40 can be extended until the time exceeds 2100 hours. When the cumulative lighting time of the mounted lamp unit 40 exceeds the replacement guide time (2100 hours) after the extension, a new time extension may not be performed, or a plurality of times (for example, (3 times extension) may be permitted.

  On the other hand, in step S212, the initial replacement of the cumulative lighting time stored in the storage unit 46 of the mounted lamp unit 40 is replaced as in the case where a new lamp unit 40 (cumulative lighting time of 0 hour) is mounted. If the estimated time (2000 hours) has not been exceeded, the process proceeds to step S214, and if the replacement guide time stored in the ROM is extended, the control unit 30 sets the replacement guide time to the initial replacement guide time. Return to (2000 hours) to end the process.

As described above, according to the projector 1 of the present embodiment, the following effects can be obtained.
(1) According to the projector 1 of the present embodiment, since the storage unit 46 that stores the cumulative lighting time is provided in the lamp unit 40, the usage history of the newly installed lamp unit 40 is known on the main body side. Is possible. As a result, it is not necessary for the user to perform a reset operation each time the lamp unit 40 is replaced, and it becomes possible to know the replacement time more accurately regardless of the usage history of the newly installed lamp unit 40. The lamp unit 40 can be protruded at an appropriate time.

  (2) According to the projector 1 of the present embodiment, when the lamp unit 40 that is already in the state to be replaced is mounted, the replacement guide time is extended. That is, since the protruding operation of the lamp unit 40 is delayed for a predetermined time, it is possible to view an image using the lamp unit 40. As a result, it is possible to avoid a situation in which an image cannot be viewed even under circumstances where it is difficult to replace the lamp unit 40, such as when a new lamp unit 40 is not available.

(Modification)
In addition, you may change embodiment of this invention as follows.
In the first to third embodiments, the solenoid 50 is used as a projecting portion for projecting the lamp unit 40 and the lamp cover 24 from the housing 2, but a cam mechanism or a crank mechanism using a motor or the like as a drive source is used. You may make it use. Alternatively, a biasing means (a spring or the like) that constantly biases the lamp unit 40 or the lamp cover 24 to project the lamp unit 40 and a suppression means that suppresses the movement of the lamp unit 40 or the lamp cover 24 due to the biasing is provided. You may make it protrude by canceling | releasing the suppression by the said suppression means.

  In the first to third embodiments, when the lamp unit 40 is turned off, the cumulative lighting time stored in the ROM or the storage unit 46 is updated. While the lamp unit 40 is turned on, The accumulated lighting time may be updated at a predetermined time (for example, 5 minutes) interval.

  In the second and third embodiments, the lamp cover 24 is not provided. However, the lamp cover 24 may be integrated with the lamp unit 40. Further, the lamp cover 24 that can be opened and closed is provided in the same manner as in the first embodiment, and the lamp cover 24 may be opened in conjunction with the pushing operation of the lamp unit 40. The 40 extrusions may be driven individually.

  In the third embodiment, when a lamp unit 40 that has exceeded the replacement guide time is mounted, a predetermined extension time is added to the replacement guide time. However, the replacement guide time is fixed and the cumulative lighting time is set. Alternatively, the extension time equivalent may be subtracted.

  In the third embodiment, the lamp unit 40 may be provided with a display unit such as a liquid crystal display device so that the user can visually recognize the accumulated lighting time stored in the storage unit 46.

  In the first to third embodiments, a projector is described as an example of a projection display device. However, a rear projector that integrally includes a transmissive screen and projects an image from the back side of the screen. It is also possible to apply.

  In the first to third embodiments, the light source light is modulated using the transmissive liquid crystal light valves 140R, 140G, and 140B, but a reflective light modulator such as a reflective liquid crystal light valve is used. It is also possible. In addition, it is possible to use a micromirror array device that modulates the light emitted from the light source by controlling the emission direction of the incident light for each micromirror as a pixel.

1 is a perspective view showing a projector according to a first embodiment. 1 is a perspective view showing a projector according to a first embodiment. The top view which shows schematic structure of a lamp unit. The top view which looked at the projector of the state which opened the lamp cover from the upper surface side. (A)-(c) is explanatory drawing for demonstrating the holding structure of a lamp cover. (A), (b) is a sectional side view of a lamp accommodating part periphery. FIG. 2 is a block diagram showing a schematic configuration of a projector. The block diagram which shows the structure of an image projection part in detail. The flowchart for demonstrating operation | movement of the projector at the time of turning off a lamp unit. (A), (b) is a sectional side view which shows the projector of 2nd Embodiment. The block diagram which shows schematic structure of the projector of 3rd Embodiment. The flowchart for demonstrating operation | movement when a lamp unit is mounted | worn with the lamp accommodating part.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Housing | casing, 4 ... Lamp accommodating part, 10 ... Image projection part, 24 ... Lamp cover, 25 ... Recessed part, 26 ... Holding member, 30 ... Control part, 30a ... Time measuring part, 31 ... Operation panel, 32 ... Image data conversion unit, 33 ... Image data processing unit, 34 ... Light valve drive unit, 35 ... Lamp drive unit, 36 ... Solenoid drive unit, 40 ... Lamp unit, 41 ... Light source lamp, 46 ... Storage unit, 50 ... Solenoid, 51 ... plunger, 110 ... illumination optical system, 120 ... color light separation optical system, 130 ... relay optical system, 140R, 140G, 140B ... liquid crystal light valve, 150 ... cross dichroic prism, 160 ... projection lens.

Claims (4)

An interchangeable light source;
A light modulation device that modulates light emitted from the light source according to image data;
A projection optical system for enlarging and projecting the light modulated by the light modulation device;
A housing for housing an apparatus main body including the light source, the light modulation device, and the projection optical system;
A timer for measuring the cumulative lighting time of the light source;
A determination unit that determines whether or not the light source is in a state to be replaced based on the cumulative lighting time measured by the timing unit;
When the determination unit determines that the light source should be replaced, a projecting portion that projects the cover member that closes the light source or the part in which the light source is accommodated from the housing; and
A projection-type display device comprising:   The projection display device according to claim 1, wherein the projecting portion projects the light source or the cover member when the light source is turned off.   3. The projection display device according to claim 1, wherein the light source includes a storage unit that stores the accumulated lighting time measured by the time measuring unit. 4. A control method for a projection display device according to claim 3,
A first step of reading the accumulated lighting time stored in the storage unit when the light source is inserted into the housing;
A second step of determining based on the read accumulated lighting time whether the light source is already in a state to be replaced;
In the second step, when it is determined that it is already in a state to be replaced, a third step of delaying the protrusion of the cover member that closes the light source or the portion in which the light source is accommodated, for a predetermined time;
A control method for a projection display device, comprising:

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