JP3524448B2 - Projection display system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] The present invention relates to a lamp as a light source.
To display images on the screen.M
ToRelated. [0002] 2. Description of the Related Art As a projection type display system, for example,
Hollow rectangular frame and one side of this frame
Screen and screen from within the frame.
Projector that shines image light on the back of the
A lamp switching device for replacing a lamp
There is something. As a lamp switching device of this projection system,
Conventionally, as described in JP-A-5-313115,
There is something. This lamp switching device is mounted on a holder on a disk.
Attach the four lamps, rotate this holder and turn off
Replacing a new lamp with a new one.
You. [0004] [Problems to be solved by the invention]The present invention
Projection that does not cause apprehension to the viewer even if the pump exchange is performed
It is intended to provide a type display system. [0005] [0006] [0007] [MEANS FOR SOLVING THE PROBLEMS] To achieve the above object
ofProjection display systems display images on a screen.
A plurality of projection units having different projectors, and a plurality of
Each display area of the photo unit is assigned
The screen and each projector of the plurality of projection units
Projector control means for transmitting display data to the
The projection unit is one of at least two lamps.
Raise one of the lamps so that it can display images.
Moving mechanism for switching the pump, and a ramp of the moving mechanism
Lamp switching control means for controlling the switching operation.
The projector control means receives a signal from the lamp switching control means.
When the moving mechanism of the projection unit is
When it is notified that the projector is in the middle,
Indicates that the lamp of the certain projection unit is being replaced
To makeIt is characterized by. [0008] [0009] [0010] DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a projection type display system according to the present invention will be described.
Various embodiments of the stem will be described with reference to the drawings.
You. First, the present invention will be described with reference to FIGS.
A first embodiment of the projection display system will be described.
You. The projection type display system according to the present embodiment is shown in FIG.
And a hollow rectangular parallelepiped frame 4 as shown in FIG.
A frame 4f supporting the frame 4 and a frame 4
Screen 4a provided on one surface and frame
4 illuminate the screen 4a with video light from the
Projector 30 for displaying an image on screen 4a, and projector 30
And a lamp switching device 40 used for displaying images.
Have. In this embodiment, the projector 30 and the lamp
The projection unit 1 is constituted by the conversion device 40. In this embodiment, the projection unit 1 is
A total of four, two at the top, bottom, left and right, inside the frame 4
Have been. The projection unit 1 is such that the optical axis of the projector 30 is lead.
The unit provided on the frame 4 so as to face the right direction
It is attached to the mounting base 1b. On the projection unit 1
The image light from the projector 30 to the screen 4a
Mirror 4d is supported by the stay 4e in a forward tilted state.
Is held. The serviceman 5 is in this frame 4
Cleaning the screen 4a and the mirror 4d, and the lamp
Maintenance such as replacement of (A) 2a and lamp (B) 2b
Do the work. The frame 4 has a small depth (D dimension) 4b.
At last, the installation condition is good. FIG. 1 shows a projector 30 and a lamp changing device 40.
FIG. 3 is a perspective view of a projection unit 1 including: Lamp replacement
In the box 2 of the device 40, a projection capable of projecting an image is provided.
Lamp (A) 2a at the position where it can be taken, as a spare for replacement
Lamp (B) 2b, lamp movement in lamp replacement
The moving space 2c required for the movement is arranged on a straight line.
ing. For convenience of the following description, the optical axis of the projector 30 will be described.
The direction is the Z direction, the direction perpendicular to the Z direction, and the lamp is switched.
The direction of the device 40 is perpendicular to the X direction, the Z direction, and the X direction.
Is defined as the Y direction. Also, in FIG.
This is the lamp movement direction when the lamp is automatically replaced. As described above, in this embodiment, the spare
Lamp (A) 2a and lamp (B) 2b
By taking the form of the box 2 which is stored in a row, the lamp
The switching device 40 occupies only three lamps,
The size of the switching unit 40 can be reduced. This result
As a result, the depth (D dimension) 4b of the frame 4 is reduced.
Can be. Next, the lamp switching device 40 of this embodiment
Details will be described with reference to FIGS. The lamp (A) 2a and the lamp (B) 2b
It is attached to each case 11 by metal fittings 11a.
You. Connected to each of lamp (A) 2a and lamp (B) 2b
The end of the cable 7a is a housing with sufficient insulation.
Socket 7 is provided. This socket 7
It is fixed to case 11 via screws 7b. Case
11, the lamp (A) 2a and the lamp (B) 2b
An opening 11b is provided for transmitting the emitted light.
ing. The two cases 11, 11 are housed in the moving frame 10.
Has been delivered. A case 11 is housed in the moving frame 10.
In the state, an opening is provided at a position corresponding to the opening 11b of the case 11.
A portion 10c is formed and connected to the socket 7.
A through hole 10d for the plug 8 is formed. further,
On the −Y side surface of the moving frame 10, the case 1
An opening 10e for detaching the cover 1 is formed. K
The case 11 is fixed to the moving frame 11
Screw 11c to remove the opening 10e of the moving frame 10.
Direction, that is, in the direction 2e,
Can be removed. The outer surface on the + Y side of the moving frame 10
A rack 10a that extends and a slur that also extends in the Z direction
An id rail 10b is attached. This moving frame 1
0 is stored in the support box 2. Support box
The slide guide that extends in the Z direction is on the inner surface on the ± X side of 2.
6 are provided. This slide guide 6
The slide rail 10b of the frame 10 enters. That is,
The moving frame 10 is movable on the support box 2 in the Z direction.
Supported. On the + Y side inner surface of the support box 2,
A lamp moving motor 9 is provided via a motor mount 9c.
Have been. The drive shaft is connected to the output shaft of the lamp movement motor 9.
Is provided on the inner surface of the support box 2 in the ± Z direction.
Moving pulleys 9b, 9b are provided. These drives
And driven pulleys 9b, 9b, toothed belt 9a
Has been passed over. This toothed belt 9a moves
It is engaged with the rack 10a of the frame 10. Therefore, the lamp
The moving motor 9 is driven to rotate the toothed belt 9a.
Then, the moving frame 10 provided with the rack 10a is moved in the Z direction.
In the direction (direction 2d). As described above, the support box 2 is
A space where three lamps can be arranged in a straight line
Have been. For this reason, the transfer in which the two lamps are stored
The moving frame 10 moves in the Z direction (direction 2d) by one lamp.
it can. The inner surface of the support box 2 in the ± Z direction is
By contacting the outer surface of the moving frame 10 in the ± Z direction, the moving frame 1
The positions of the lamp (A) 2a and the lamp (B) 2b within 0 are detected.
The limit switches 13a and 13b
ing. The housing-like plug 8 with sufficient insulation is
And connected to the power supply via cable 8a.
Supply power to the lamp (A) 2a or the lamp (B) 2b
To do. Extends in the Y direction on the side of the plug 8
A rack 8b is provided. In addition, the support box 2
The outer surface in the + Y direction is connected to a motor via a motor mount 12c.
A motor 12 is mounted on the motor. This plug transfer
The output shaft of the dynamic motor 12 has a pini engaging with the rack 8b.
An ON 12a is provided. On the motor mount 12c
Is a side surface of the plug 8 and a rack 8b is provided.
A guide roller 12b that comes into contact with the side of the side that is not shaved
Is provided. Therefore, the plug moving motor 12
When driven and the pinion 12a rotates, the rack 10b
The attached plug 8 is in the Y direction, in other words
Then, the plug 8 moves in the insertion / removal direction 12d. Next, referring to FIG.
Will be described. Cable 8 for connecting plug 8 and power supply 42
a is provided with an ammeter (light-off detection means) 43.
You. The signal from the ammeter 43 and the limit switch 13
a and 13b are input to the switching controller 41.
It has become. The switching controller 41 is based on these signals.
And the lamp moving motor 9 and the plug moving motor 12
Drive control. Further, the switching controller 41 is provided at the position where projection is possible.
For measuring the lighting time of the lamp located in
Lamp that has
Whether the lighting time of the lamp has reached the predetermined lamp life
It also has the function of determining A projector controller 45 is connected to the projector 30.
Have been. The projector 30 of the present embodiment has a liquid crystal panel inside.
Light from a lamp, and the LCD panel
This is to enlarge and project the image on the screen. Projector controller 4
5 controls the operation of the projector 30 and
The display data is transmitted to the liquid crystal panel inside. Next, a lamp switching device will be described with reference to FIGS.
The operation of the device 40 will be described. As shown in FIG.
b is in the ON state, and the lamp (A) 2a
When the lamp is on, the life of the lamp (A) 2a or failure etc.
Suddenly turn off the light, and it becomes impossible to project images.
You. When the lamp (A) 2a is turned off, the ammeter 43
The change in the current value from 42 is transmitted to the switching controller 41. Off
In response, the switching controller 41 turns off the lamp (A) 2a.
First, the plug movement motor 12 is
Current to rotate lug 8 in direction to pull out from socket 7
Supply. Further, the switching controller 41 controls the lamp (A) 2
When it is determined that a has reached the predetermined lamp life,
It works similarly. This depends on the type of lamp,
Some lamps explode suddenly at the end of their pump life.
In such a case, the ammeter 43 cannot cope.
You. When the plug moving motor 12 is driven, as shown in FIG.
Thus, the plug 8 moves in the direction 12d, and
Come off. Next, the switching controller 41 controls the lamp moving motor.
9, the moving frame 10 is rotated so as to move in the -Z direction.
Supply current. When the lamp moving motor 9 rotates,
The moving frame 10 moves in the -Z direction. In this process, first,
The limit switch 13b is turned off, and
The power switch 13a is turned on. Limit switch 1
When 3a is turned on, the current to the lamp moving motor 9 is cut off.
When the moving frame 10 stops, the lamp (A) 2a is replaced.
As a result, the auxiliary lamp (B) 2b reaches the position where projection is possible. Further
In the opposite direction, the plug moving motor 12 removes the plug 8.
And the plug 8 is inserted into the socket 7 of the lamp (B) 2b.
The power supply required for the lamp (B) 2b is supplied.
It is. Here, as shown in FIG.
Replace the lamp (A) 2a with a new one.
When the image projection of the second lamp (B) 2b becomes impossible,
Prepare in advance. At this time, a ramp is
(A) Screw 11c for holding case 11 of 2a
And remove the case 1 of the ramp (A) 2a from the moving frame 10.
1 and then replace the lamp (A) 2a
Then, place the case 11 together with the new lamp (A) 2a at the original position.
Return to When the lamp (B) 2b needs to be replaced
In this case, the replacement of the lamp (A) 2a described above is omitted.
The same but different parts are the limit switches 13a, 1
3b that the ON / OFF state is opposite,
That is, the dynamic motor 9 rotates in the reverse direction. As described above, in this embodiment, the lamp is turned off.
The lamp can be changed automatically by the operation of the changing device 40.
You. Moreover, as the lamp moves, the lamp (A) 2
a, a plug 8 is provided in each socket 7 of the lamp (B) 2b.
The cable is automatically inserted and removed, so even if the lamp moves,
Of the lamp and the power supply
Incomplete connection can be avoided. In addition, multiple runs
Equipment can be handled with a single power supply.
Abbreviation can be achieved. In this embodiment, the light-off detecting means is used.
The ammeter 43 was used as the
Anything can be used, for example, run
It may be an optical sensor that directly detects the light of the pump. Next, the present invention will be described with reference to FIGS.
About the second embodiment of the projection display system according to
I will tell. The projection unit 1A of this embodiment is similar to that of FIG.
0, the support box 2 of the lamp switching device 40
Is the direction perpendicular to the optical axis of the projector 30
The lamp switching device 40 is turned to the projector 3 so as to face (Y direction).
0. The projection unit 1A has an optical axis of the projector 30.
The unit fixed to the frame 4 is oriented horizontally.
It is attached to the socket mounting base 1b. Projection lens 1b
Forwards the image light from the projection lens 1b to the screen
Mirror 4d for guiding to 4a is supported by stay 4e
Have been. As described above, the method of attaching the projection unit is
In other words, the length of the support box 2 of the lamp switching device 40
Direction, in other words, the moving direction of the lamp
May be oriented in any direction with respect to the optical axis. Next, the projection type display system according to the present invention will be described.
The third embodiment will be described with reference to FIGS.
I will tell. This embodiment is similar to the first embodiment.
The pump power supply system has been changed.
This is the same as the first embodiment. Therefore, in this embodiment,
Even if there are two lamps in the moving frame 10 including the spare
2a and 2b are provided side by side on a straight line.
The moving frame 10 moves in the direction in which 2a and 2b are arranged.
You. Thus, the total number of lamps including the spare
By moving the lamp back and forth in a straight line with only two lamps,
If you want to automatically replace the
Rather than providing a control system and drive system for automatically inserting and removing 8
Also for lamp (A) 2a and lamp (B) 2b
It is preferable to provide the power supplies 42a and 42b in the power supply. From each of the power supplies 42a and 42b,
Cable 8 for lamp (A) 2a and lamp (B) 2b
a is extended, and a plug 8 is provided at the tip thereof.
You. Each plug 8, 8 is screwed to the moving frame 10, respectively.
The lamp (A) 2a and the lamp (B) 2b.
It is connected to the sockets 7,7. Each power supply 42a, 42b
Is connected to one main power supply (not shown).
You. In this embodiment, the limit switch 13
a, 13b ON / OFF, the lamp to the required position
Power supply 42a,
An instruction is given to 42b. As described above, as in this embodiment, the total number of lamps
But the lamp is reciprocating in a straight line.
When the lamp is automatically replaced,
In order not to hinder the linear reciprocation, the cable 8a
If there is enough extra length, the cable will get caught halfway
Do not disconnect the plug 8 or disconnect the cable 8a.
And the plug 8 is automatically connected as in the first embodiment.
There is no need to provide a control system and drive system that can be inserted and removed by movement
Therefore, the device can be simplified. The fourth type of the projection type display system according to the present invention
An embodiment will be described with reference to FIG. This embodiment is a transfer of the first embodiment.
The moving frame moving mechanism has been changed.
It is basically the same as one embodiment. The moving frame moving mechanism according to the present embodiment includes a moving frame 1
0 and the ball screw 15 extending in the movement direction 2d.
Stepping for ramp movement to rotate ball screw 15
The motor 16 and the stepping motor 16
Motor mount 16c to be mounted on the box 2 and a ball screw
Rolling shaft 15 rotatably attached to the support box 2
Receiving members 15c, 15c,
A nut 15a and a nut 15a are fixed to the moving frame 10.
And a metal fitting 15b. In the present embodiment, the outline of the operation is as described above.
Of the lamp (A) 2a.
Unable to project images due to sudden turn off due to life or failure
If a situation arises, stepping from the lamp switching controller
The motor (16) moves the lamp (B) 2b to a position where projection is possible.
Current is supplied. Now, stepping mode
The ball screw 15 rotates, and the directly connected ball screw 15 also rotates,
The lamp (B) 2b contained in the moving frame 10 is
It moves with the object 15a. As is well known, the number of pulses is counted,
Number of controllable stepping motors 16 and backlash
Combines the ball screw 15 and nut 15a with the minimum screw size
The moving mechanism can perform high-precision movement positioning.
For automatic replacement of the lamp, which is the light source of the
This is convenient for positioning. After replacing the lamp automatically,
Replace the necessary lamp (A) 2a with a new one.
In advance, the image projection of the lamp (B) 2b becomes impossible next time
In such a case, preparing in advance is the same as in the first embodiment.
The same is true. Also, regarding the power supply to each lamp,
The description of the first embodiment has been omitted, but this is also the same as in the first embodiment.
You. The fifth type of the projection type display system according to the present invention
An embodiment will be described with reference to FIGS.
You. In this embodiment, the run from the lamp switching device
Lamp is removed, and new lamps are refilled.
The other basic configuration is the first
This is the same as the embodiment. The inner surface of the movable frame 10 on the + X side has
A photo sensor (preliminary lamp detecting means) 21 is provided for each
Have been killed. On the other hand, on the + X side outer surface of each case 11,
Is provided with a detected part 22 that enters the photo sensor 21.
Have been. The completion of the movement of the ramp 2 is indicated by the limit switch 1
After detection at 3a and 13b, the used lamp 2 is
When the case 11 is taken out, the case 11 moves
Since the detected part 22 moves with the movement, the photo sensor 21
Changes from ON to OFF. Also, a new lamp 2
The attached case 11 is set in the moving frame 10 again.
And the detected part 22 of the case 11
And the photo sensor is turned on. This photo center
The signal of the sensor 21 is sent to the lamp switching controller. Pho
When the sensor 21 switches from OFF to ON once,
The pump changeover controller recognizes that a new lamp has been refilled.
Then, the fact is transmitted to the projector controller. Projector controller
When the projector receives notification that a new lamp has been
For example, "The new lamp has been refilled
Was. Is sent. The projector uses this display
Data is received, the video light corresponding to this display data is scanned.
Hit clean and say, "New lamp has been refilled.
Was. Is displayed. If a new lamp 2 is stored
Case 11 is incorrectly set to the regular
If it is misaligned or reversed
Is "new" because the photo sensor 21 does not turn on.
The lamp has been refilled. Is not displayed. others
Therefore, in such a case, the worker can recognize the erroneous work. The completion of the movement of the ramp 2 is determined by the limit switch.
After a certain period of time after being detected by switches 13a and 13b
Use, for example, beyond the lamp life
Take out case 11 containing used lamp 2
Is not performed (when the photo sensor 21 does not turn off)
In addition, the completion of the movement of ramp 2 is indicated by a limit switch.
After detection at 13a and 13b, the used lamp 2
After the stored case 11 is taken out,
Case 1 in which new lamp 2 is stored even after a while
1 is not set (the photo sensor 21 is turned on)
If not, the lamp changeover controller will
Is not satisfied, and informs the projector controller to that effect.
I can. When the projector controller receives this, the projector
For example, display "Please add a new lamp."
You. Note that the above-mentioned "new run" is displayed on the screen screen.
Replenish the pump. Is inconvenient to display.
Display device, for example, separately prepared in a work room, etc.
And so on. During automatic lamp replacement, the screen
If it is not convenient to see nothing on the surface,
For example, use a projection unit other than the one whose
For example, "The lamp is currently being replaced.
No. "May be displayed. Specifically, the figure
As shown in FIG. 16, for example, a plurality of projection units 1A
a, 1Ab, the lamp of a certain projection unit 1Aa is
When the lamp has been replaced, the lamp
Portion 4a in which projection unit 1Aa under replacement is in charge of display
Nothing is displayed in b. Therefore, the lamp switching controller 4
1 is adjacent to the projection unit 1Aa during lamp replacement.
To the projection unit 1Ab
It is being replaced. Please wait for a little while. ". This
When the lamp replacement status is displayed as in
The system administrator and the viewers are not malfunctioning
Can be perceived and give extra anxiety
Absent. The sixth aspect of the projection display system according to the present invention
An embodiment will be described with reference to FIG. In this embodiment, one moving frame 17 is
The lamps are housed, and a total of 3 lamps including 2 spare lamps
There are two lamps on the tower. The three moving frames 17 are stored so as to be movable in the Z direction.
The support box 20 to be stored is provided with each moving frame 17.
Five lamps are stored in the Z direction to reach the position where shooting is possible
The space which can be done is secured. Of this support box 20
The + Z side moves the moving frame 17 in which a new lamp is stored.
An opening is formed for inserting the support box 20 into -Y.
On the side of the -Z side, used lamps are stored.
An opening for taking out the moving frame 17 stored therein is formed.
ing. In this embodiment, the -Z direction is vertically downward.
It is a direction. The surface on the −Y side of the support box 20 is
The moving frame moving mechanism 1
8 are provided. This moving frame moving mechanism 18 moves
Frame moving stepping motor 18a, pinion 18b
And the rotation of the stepping motor 18a is controlled by a pinion 18b.
And a belt 18c for transmitting the belt 18c. Support box
On the + Y side inner surface of the box 20, a slide extending in the Z direction
A rail 20b and a photo sensor 20c are provided.
You. The photo sensor 20c is run from the position where projection is possible.
It is provided at a position shifted by one step in the + Z direction. The moving frame 17 extends in the Z direction on the outer surface on the -Y side.
Rack 17a is provided on the outer surface on the + Y side in the Z direction.
A slide guide 17b having an elongated groove is provided.
Have been. The rack 17a of the moving frame 17 moves the moving frame.
It meshes with the pinion 18b of the mechanism 18. Also, moving frame 1
7 is a slide guide 17b of the support box 20.
It is slidably fitted in the id rail 20b. The lamp 19a located at the position where projection is possible
Of the moving frame moving mechanism 18
The on 18b is rotated to store the lamp 19a.
The moving frame 17 moves in the -Z direction. Of the moving frame 17
With the movement, it is located on the + Z side of the moving frame 17.
The moving frames 17, 17 also move in the -Z direction by their own weight, and
The lamp 19b reaches the position where projection is possible. This lamp 19b
When the light is turned off due to the life or the like, the moving frame moving mechanism 18 is again turned off.
The pinion 18b rotates to house the lamp 19b.
Moving frame 17 and its position on the + Z side of moving frame 17
Moving frame 17 moves in the -Z direction, and a new ramp
19c reaches the projection-possible position. Lamp 19c can be projected
When reaching the position, the photo sensor 20c detects the moving frame 17.
Since it becomes impossible to know,
Notify the amplifier switching controller. The lamp switching controller
When received, to the projector via the projector controller, for example,
Display the message "Please add a new lamp."
The photo sensor 20c detects the moving frame 17 again.
And inform the lamp switching controller that the spare moving frame has been replenished.
Tell When the lamp switching controller receives this, the projector
For example, `` A new lamp is
Was filled. Is displayed. Moving frame containing used lamps
17 are sequentially sent to the empty space 19,
The hole 20 is taken out from the opening on the -Z side. The power cable of the present embodiment is
This is the same as the embodiment. As described above, the present embodiment has been described above.
The moving frame does not reciprocate as in each embodiment.
In addition, since the moving frame 17 moves one way, the apparatus is simplified.
be able to. Incidentally, the present embodiment is a
Focus on reducing the frequency of refilling lamps
, And house a total of three lamps,
The same applies to the first to fourth embodiments described above.
Alternatively, a total of three lamps may be stored. However
In this case, as described above,
Cannot be expected. [0062] According to the present invention,For multiple projection units
If one of the projection units is replacing the lamp,
The lamp of a certain projection unit is being replaced in the projection unit.
To display the fact that there is
Not only the viewer but also the viewer
It can be done and does not cause any extra anxiety. [0063]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a projection unit according to a first embodiment of the present invention. FIG. 2 is a perspective view of a projection display system according to the first embodiment of the present invention. FIG. 3 is a cross-sectional view of the projection display system according to the first embodiment of the present invention. FIG. 4 is a sectional view taken along line IV-IV in FIG. FIG. 5 is a sectional view taken along line VV in FIG. FIG. 6 is a block diagram of a control system of the projection unit according to the first embodiment of the present invention. FIG. 7 is an explanatory diagram (part 1) illustrating an operation of the lamp switching device according to the first embodiment of the present invention. FIG. 8 is an explanatory view (No. 2) showing the operation of the lamp switching device in the first embodiment according to the present invention. FIG. 9 is an explanatory view (No. 3) showing the operation of the lamp switching device in the first embodiment according to the present invention. FIG. 10 is a perspective view of a projection unit according to a second embodiment of the invention. FIG. 11 is a sectional view of a projection display system according to a second embodiment of the present invention. FIG. 12 is a cross-sectional view (before lamp replacement) of a lamp switching device according to a third embodiment of the present invention. FIG. 13 is a cross-sectional view (after lamp replacement) of a lamp switching device according to a third embodiment of the present invention. FIG. 14 is a sectional view of a lamp switching device according to a fourth embodiment of the present invention. FIG. 15 is a sectional view of a lamp switching device according to a fifth embodiment of the present invention. FIG. 16 is a perspective view of a projection display system according to a fifth embodiment of the present invention. FIG. 17 is a sectional view of a lamp switching device according to a sixth embodiment of the present invention. [Description of Signs] 1, 1A, 1Aa, 1Ab: Projection unit, 2: Support box, 4: Frame, 4a: Screen, 2a, 2
b, 19a, 19b, 19c ... lamp, 7 ... socket,
7a, 8a, 8b: cable, 8: plug, 9: lamp moving motor, 10, 17: moving frame, 11: case, 12
... Plug moving motor, 13a, 13b ... Limit switch, 16 ... Lamp moving stepping motor, 18 ... Lamp moving mechanism, 20c, 21 ... Photo sensor, 30 ... Projector, 40 ... Lamp switching device, 41 ... Lamp switching controller , 42, 42a, 42b ... power supply, 43 ... ammeter, 45
... Projector controller.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Akio Yabe 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Within the Digital Media Systems Division, Hitachi, Ltd. (72) Inventor Tadashi Sato 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Hitachi, Ltd. Digital Media Systems Division (72) Keiichiro Tanaka, Inventor Keiichiro Tanaka 292, Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa Prefecture Hitachi, Ltd. Digital Media Systems Division (72) Inventor, Takashi Kanbara Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa 292 Hitachi Media Digital Media Systems Division (56) References JP-A-2-257193 (JP, A) JP-A-7-281146 (JP, A) JP-A-8-106128 (JP, A) Japanese Unexamined Patent Publication No. Hei 9-313436 (JP, A) JP, A) JP-A-60-218615 (JP, A) JP-A-61-176115 (JP, A) JP-A-64-88533 (JP, A) JP-A-2000-162706 (JP, A) JP-A-4-250437 (JP, A) JP-A-1-77612 (JP, U) JP-A-6-54004 (JP, U) JP-A-6-54299 (JP, A) U) Japanese Utility Model 7-39043 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03B 21/00-21/30 H04N 5/74

Claims (1)

(57) and a plurality of projection unit comprising a projection device for displaying an image to the Claims 1] on scan clean, the each display area of the plurality of projection units are assigned A screen, and projector control means for transmitting display data to each projector of the plurality of projection units , wherein the projection unit includes at least two lamps.
So that any one of the lamps can be displayed
A moving mechanism for performing a lamp switching operation, and a run mechanism of the moving mechanism;
Lamp switching control means for controlling the lamp switching operation, the projector control means, from the lamp switching control means,
When the moving mechanism of a certain projection unit is operating and receiving notification that the lamp is being replaced, the projector of another projection unit displays that the lamp of the certain projection unit is being replaced. Projection display system.