JP2012063789A - Picture display device and lamp unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a picture display device capable of smoothly managing the use of a lamp, and a lamp unit for the picture display device.SOLUTION: A picture display device comprises a lamp holder 600 for holding a lamp 500, a lamp side circuit portion 700 arranged on the lamp holder 600, a holder storage portion 800 for detachably storing the lamp holder 600, a body side circuit portion 900 arranged on a body side, and connector portions 706 and 903 for electrically connecting the lamp side circuit portion 700 and the body side circuit portion 900. The lamp side circuit portion 700 has a memory portion 62 for storing integrated time information about an integrated use time of the lamp 500 in a writable/readable manner, and the integrated use time of the lamp 500 stored in the memory portion 62 can be notified to a user.

Description

  The present invention relates to a video display device and a lamp unit attached to the video display device, and is particularly suitable for use when the lamp unit is replaceable.

  Currently, projection-type image display devices (hereinafter referred to as “projectors”) that enlarge and project an image onto a screen have been commercialized and widely used. In such projectors, a lamp is generally used as a light source, and light from the lamp is modulated by a light modulation element and projected onto a screen.

  In this case, if the lamp is turned off during the projection operation, the image display is interrupted. In order to cope with such a situation, in a projector, a lamp is usually replaceable.

  If the lamp can be replaced by a simple operation, it is assumed that the lamp is replaced as appropriate according to the usage scene of the projector. For example, when a presentation is performed using a projector, an old lamp may be used during practice, and a new high-brightness lamp may be used in actual performance.

When lamp replacement occurs frequently, it is necessary to manage the lifetime, compatibility with the projector, etc. for each lamp. The following Patent Document 1 describes a configuration in which information indicating whether or not the printer is compatible is held in a toner cartridge, and the printer reads this information when the toner cartridge is mounted to determine the compatibility of the toner cartridge. Yes.
JP 2004-145170 A

  In the case of diverting the technique described in Patent Document 1 to a lamp, a configuration is conceivable in which the lamp holds information indicating whether the lamp is compatible with the projector. However, with this configuration, the lamp cannot be managed according to the usage situation. Normally, the lamp deteriorates according to the use situation. Therefore, when the lamp is frequently replaced, it is necessary to hold information reflecting the past usage history in the lamp and appropriately control lighting of the lamp based on the information.

  The present invention has been made in view of this point, and it is an object of the present invention to provide a video display device capable of smoothly managing the use of a lamp and a lamp unit therefor.

  A lamp holder for holding a lamp; a lamp-side circuit portion disposed in the lamp holder; a holder housing portion for detachably housing the lamp holder; a body-side circuit portion disposed on the body side; and the lamp side A connector unit that electrically connects the circuit unit and the main body side circuit unit, and the lamp side circuit unit includes a storage unit that stores the accumulated time information related to the accumulated usage time of the lamp in a readable and writable manner. And the accumulated usage time of the lamp stored in the recording unit can be notified to the user.

  As described above, according to the present invention, it is possible to provide an image display device capable of smoothly managing the use of a lamp.

  The effects and significance of the present invention will become more apparent from the following description of embodiments. However, the following embodiment is merely an example when the present invention is implemented, and the present invention is not limited to what is described in the following embodiment.

The figure which shows the external view of the projector which concerns on embodiment The figure which shows the structure of the optical engine which concerns on embodiment The perspective view which shows the structure of the mirror unit which concerns on embodiment The disassembled perspective view which shows the structure of the lamp unit which concerns on embodiment. The partially expanded view which shows the structure of the lamp unit which concerns on embodiment The figure which shows the structure of the circuit board of the lamp unit which concerns on embodiment The perspective view explaining the attachment method of the lamp unit which concerns on embodiment The perspective view which shows the attachment state of the lamp unit which concerns on embodiment Partial sectional drawing which shows the attachment state of the lamp unit which concerns on embodiment The figure which shows the circuit structure of the projector which concerns on embodiment The figure which shows the system configuration | structure of the circuit part of the controller and lamp unit side which concerns on embodiment The flowchart which shows the update process of the use accumulation time which concerns on embodiment The flowchart which shows a process when the lamp management information which concerns on embodiment cannot be read

  The configuration of the projector according to the embodiment will be described below with reference to the drawings. Note that the projector according to the present embodiment has two lamp units as light sources of the illumination device.

  FIG. 1 is a diagram (outer perspective view) showing a configuration of a projector. The projector includes a cabinet 1. The cabinet 1 has a substantially rectangular parallelepiped shape that is thin in the vertical direction and long in the front-rear direction, and an intake port 5 for taking outside air into the cabinet 1 is formed on a side surface thereof. Note that a lamp cover (not shown) is disposed on the back surface of the cabinet 1 so as to be openable and closable, and the user can open the lamp cover and replace the lamp unit as appropriate.

  In the cabinet 1, an optical engine 2, a projection lens 3, and a cooling device 4 are arranged. The optical engine 2 generates light (video light) modulated by the video signal. A projection lens 3 is attached to the optical engine 2, and a front portion of the projection lens 3 is exposed from the front surface of the cabinet 1. The image light generated by the optical engine 2 is projected by the projection lens 3 onto a screen surface arranged in front of the projector. The cooling device 4 takes in outside air from the intake port 5 and supplies this outside air to the optical engine 2 as cooling air.

  FIG. 2 is a diagram illustrating a configuration of the optical engine. In the figure, reference numeral 10 denotes an illumination device having two lamp units 10a and 10b and a mirror unit 10c. The lamp units 10a and 10b include a lamp made of an ultrahigh pressure mercury lamp, a metal halide lamp, a xenon lamp, or the like. Light from the lamp units 10a and 10b is emitted as substantially parallel light by the action of the reflector. The configuration of the lamp units 10a and 10b will be described in detail later.

The mirror unit 10c is provided with a mirror that can be rotated in parallel with the XZ plane of FIG. The mirror guides the light from the lamp unit 10a to the fly eye integrator 11 when the lamp unit 10a is activated, and the lamp unit 1 when the lamp unit 10b is activated.
It is rotated to guide the light from 0b to the fly eye integrator 11. The configuration of the mirror unit 10c will be described later with reference to FIGS.

  Light from the illumination device 10 is incident on a PBS (polarized beam splitter) array 12 and a condenser lens 13 via a fly eye integrator 11. The fly-eye integrator 11 includes first and second fly-eye lenses made up of eyelid-shaped lens groups, and the illumination device 10 has a uniform light amount distribution when entering the liquid crystal panels 18, 24, 33. An optical action is imparted to the light incident from.

  The PBS array 12 has a plurality of PBSs and half-wave plates arranged in an array, and aligns the polarization direction of the light incident from the fly eye integrator 11 in one direction. The condenser lens 13 condenses light incident from the PBS array 12. The light transmitted through the condenser lens 13 enters the dichroic mirror 14.

  The dichroic mirror 14 transmits only the light in the blue wavelength band (hereinafter referred to as “B light”) out of the light incident from the condenser lens 13, and the light in the red wavelength band (hereinafter referred to as “R light”). Reflects light in the green wavelength band (hereinafter referred to as “G light”). The B light transmitted through the dichroic mirror 14 is reflected by the mirror 15 and enters the condenser lens 16.

  The condenser lens 16 imparts an optical action to the B light so that the B light enters the liquid crystal panel 18 as substantially parallel light. The B light transmitted through the condenser lens 16 is incident on the liquid crystal panel 18 via the incident side polarizing plate 17. The liquid crystal panel 18 is driven according to the blue video signal, and modulates the B light according to the driving state. The B light modulated by the liquid crystal panel 18 is incident on the dichroic prism 20 via the emission side polarizing plate 19.

  Of the light reflected by the dichroic mirror 14, G light is reflected by the dichroic mirror 21 and enters the condenser lens 22. The condenser lens 22 imparts an optical action to the G light so that the G light enters the liquid crystal panel 24 as substantially parallel light. The G light transmitted through the condenser lens 22 is incident on the liquid crystal panel 24 through the incident side polarizing plate 23. The liquid crystal panel 24 is driven according to the green video signal and modulates the G light according to the driving state. The G light modulated by the liquid crystal panel 24 is incident on the dichroic prism 20 via the output side polarizing plate 25.

  The R light transmitted through the dichroic mirror 21 is incident on the condenser lens 26. The condenser lens 26 imparts an optical action to the R light so that the R light enters the liquid crystal panel 33 as substantially parallel light. The R light transmitted through the condenser lens 26 travels on an optical path composed of relay lenses 27, 29, 31 for adjusting the optical path length and two mirrors 28, 30, and is incident on the liquid crystal panel 33 through the incident side polarizing plate 32. . The liquid crystal panel 33 is driven according to the red video signal, and modulates the R light according to the driving state. The R light modulated by the liquid crystal panel 33 is incident on the dichroic prism 20 via the emission side polarizing plate 34.

  The dichroic prism 20 color-synthesizes the B light, G light, and R light modulated by the liquid crystal panels 18, 24, and 33 and causes the light to enter the projection lens 3. The projection lens 3 includes a lens group for forming an image of projection light on a projection surface, and an actuator for adjusting a zoom state and a focus state of a projection image by displacing a part of the lens group in the optical axis direction. It has. The light synthesized by the dichroic prism 20 is enlarged and projected on the screen by the projection lens 3.

  Next, the configuration of the mirror unit 10c will be described with reference to FIG.

  FIG. 3 is a perspective view showing the configuration of the mirror unit 10c.

  In the figure, a base 100 includes an upper plate portion 101, a lower plate portion 102, a back plate portion 103, and two wall portions 104. The upper plate portion 101, the lower plate portion 102, the back plate portion 103, and the two wall portions 104 are integrally formed by aluminum die casting. In addition, a concave portion 105 connected to the upper plate portion 101 is disposed between the two wall portions 104. The lower plate portion 102 and the upper plate portion 101 are parallel to each other. A mirror holder 200 is rotatably disposed between the lower plate portion 102 and the upper plate portion 101.

  On the inner side surfaces of the two wall portions 104 and the back plate portion 103, a concave portion having a slightly larger outline than the adjustment plate 203 is formed, and the adjustment plate 203 is fitted into this concave portion and screwed. The adjustment plate 203 has a central portion screwed to the back plate portion 103, and portions corresponding to the two wall portions 104 are pressed against the wall portion 104 so as to be elastically displaceable. The adjustment plate 203 is made of a flexible metal thin plate. Further, adjustment screws 204 are screwed onto the outer surfaces of the two wall portions 104, and the tips of these adjustment screws 204 are in contact with the adjustment plate 203.

  The two wall portions 104 have an inner surface of approximately 45 ° with respect to the traveling direction of light from the lamp units 10a and 10b when the mirror unit 10c is arranged in the optical engine of FIG. It is formed to tilt at an angle.

  A mirror 201 is attached to the mirror holder 200. Further, shafts 202 project from the upper and lower surfaces of the mirror holder 200 at coaxial positions. A shaft 202 disposed on the lower surface of the mirror holder 200 is fitted into a shaft hole disposed on the lower plate portion 102, and the shaft 202 disposed on the upper surface is mounted on the torque limiter 402 via a bearing.

  A substrate 300 is mounted on the upper surface of the upper plate portion 101 via a boss. Two detection switches 301 and 302 are mounted on the lower surface of the substrate 300. These detection switches 301 and 302 are pressed by a projection (not shown) on the upper surface of the mirror holder 200 and turned on when the mirror holder 200 is in the rotation end position.

  The drive unit 400 includes a gear 401 provided with a torque limiter 402, a gear 403, a motor 404, a gear (not shown) attached to a drive shaft of the motor 404, a cover 405, and the lower plate portion 102 side. The coil spring 406 is provided. The torque limiter 402 idles the gear 401 when a certain torque or more is applied. The gear 403 is rotatably attached to the cover 405. The cover 405 is formed with a shaft hole that engages with the shaft 402 a of the torque limiter 402. The cover 405 is screwed to a boss formed on the outer surface of the wall portion 104. The motor 404 is attached to the concave portion 105 disposed between the two wall portions 104.

  The driving force from the motor 404 is transmitted to the torque limiter 402 via the gear mounted on the driving shaft of the motor 404 and the gears 403 and 401, and further the shaft 202 on the upper surface of the mirror holder 200 mounted on the torque limiter 402. Is transmitted to. Thereby, the mirror 201 rotates together with the mirror holder 200.

  A coil spring 406 is mounted on the back side of the lower plate portion 102. The coil spring 406 is attached to the mirror unit 10 c so that both ends are locked between a collar formed on the lower surface of the mirror holder 200 and a collar formed on the back surface of the lower plate section 102. In the state of FIG. 3A, the coil spring 406 urges the mirror holder 200 in a direction to be pressed against the wall 104 on the front side of the figure, and in the state of FIG. 3B, the coil spring 406 is applied to the wall part 104 on the back side of the figure. The mirror holder 200 is urged in the pressing direction.

  The rotation end position of the mirror holder 200 can be adjusted by the amount by which the adjustment plate 203 is lifted by the adjustment screw 204. When the mirror unit 10c is incorporated in the optical engine shown in FIG. 2, the amount of lifting of the adjusting plate 203 by the adjusting screw 204 is adjusted so that the light from each of the lamp units 10a and 10b is properly directed to the fly eye integrator 11. Adjusted.

  When in the state shown in FIG. 5A, the light from the lamp unit 10 b is reflected by the mirror 201 and guided to the flying eye integrator 11. When switching the lamp unit to be used from this state, the motor 404 is driven to rotate the mirror unit 200 counterclockwise. This rotation is continued until a certain time elapses after the detection switch 302 is turned on.

  During this time, the mirror unit 200 is pressed against the adjusting plate 203, and the mirror 201 is positioned at the position shown in FIG. Note that the gear 401 idles due to the action of the torque limiter 402 during such pressing. Thus, the mirror unit 200 is positioned in the state shown in FIG. 5B, and the light from the lamp unit 10a is reflected by the mirror 201 and guided to the flying eye integrator 11. When the mirror unit 10c is switched from the state shown in FIG. 5B to the state shown in FIG. 5A, the same operation as described above is performed except that the driving direction of the motor 404 is opposite to the above.

  Next, the configuration of the lamp unit and the method for attaching the lamp unit will be described with reference to FIGS. In the following, one lamp unit will be described as an example, but the configuration and mounting method of the lamp unit shown below are applied to both of the two lamp units 10a and 10b shown in FIG. .

  FIG. 4 is a diagram showing the configuration of the lamp unit and its mounting portion. The lamp unit includes a lamp 500, a lamp holder 600 that holds the lamp 500, and a circuit board 700. Further, a holder housing portion 800 for housing the lamp holder 600 and a circuit board 900 are disposed on the main body chassis side. The mirror unit 200 is mounted on the mirror unit mounting portion 830 in the drawing.

  The lamp holder 600 includes a box portion 610 on which the lamp 500 is mounted, and an opening 611 for guiding light from the lamp 500 forward is formed on the front surface of the box portion 610. In addition, a flange portion 620 that protrudes forward is formed in the upper front portion of the box portion 610, and a hole 621 is formed in the flange portion 620. Furthermore, two pins 622 projecting downward are formed on the front upper portion of the box portion 610. Further, an L-shaped flange 630 that protrudes rearward is formed on the upper rear surface of the box portion 610, and a substrate holding portion 640 extends from the flange 630.

  FIG. 5A is an enlarged view of the substrate holder 640. An opening 641 penetrating vertically is formed in the substrate holding portion 640, and an L-shaped locking portion 642 for locking the circuit board 700 in the X-axis direction and the Y-axis direction is formed on the upper surface. ing. Further, the substrate holding portion 640 is formed with a screw hole 643 into which the screw 710 is screwed. Further, on the upper surface of the substrate holding part 640, a placement part 644 on which the periphery of the circuit board 700 is placed is formed.

FIG. 6 is a diagram illustrating a configuration of the circuit board 700. FIGS. 9A and 9B are a top view and a back view of the circuit board 700, respectively. Two holes 701 are formed in the circuit board 700, and a notch 702 is formed at a position corresponding to the screw 710 on the side surface. Further, the circuit board 700 has a notch 70 at a position corresponding to the locking part 642 of the board holding part 640.
3, 704 are formed. A circuit portion 705 including an IC and a connector 706 electrically connected to the circuit portion 705 are disposed on the back surface of the circuit board 700.

  Referring to FIG. 5A, when circuit board 700 has notches 703 and 704 fitted into locking portions 642 and the periphery is placed on mounting portion 644, circuit board 700 has a predetermined stroke in the X-axis direction and Z-axis direction. It has a contour shape that can be displaced. Further, the mounting portion 644 has such a width that the circuit board 700 does not fall into the opening 641 even when the circuit board 700 is displaced in this way.

  Returning to FIG. 4, the holder housing portion 800 includes a box mounting portion 811 whose front and upper surfaces are open, and the box portion 610 on the lamp holder 600 side is mounted on the box mounting portion 811. Pins 812 that are respectively engaged with the two holes 621 on the lamp holder 600 side are formed on the front upper portion of the box mounting portion 811. In addition, holes 813 (not shown in FIG. 4; see FIG. 7) that engage with the two pins 622 on the lamp holder 600 side are formed in the bottom on the front side of the box mounting portion 811. Further, the box mounting portion 811 is formed with a pair of guide portions 814 that guide the lamp holder 600 by locking the back surface of the box portion 610 when the lamp holder 600 is mounted. In addition, vent holes 815 for allowing air to pass through the box mounting portion 811 are formed in the two walls of the box mounting portion 811.

  In the holder accommodating portion 800, a substrate holding portion 820 is formed at a position facing the substrate holding portion 640 on the lamp holder 600 side when the lamp holder 600 is mounted.

  FIG. 5B is an enlarged view of the substrate holder 820. The substrate holding unit 820 includes a recess 821, two pins 822 and a screw hole 823 that project from the recess 821. Further, a notch 824 is formed in the wall in the vicinity of the screw hole 823 in the wall surrounding the recess 821.

  The circuit board 900 has a notch 901 and a hole 902 that engage with the two pins 822 on the board holding portion 820 side, respectively. On the upper surface of the circuit board 900, a connector 903 for joining the connector 706 on the circuit board 700 disposed on the lamp holder 600 side and a connector 904 for electrically joining the connector 903 to the main board are mounted. ing. The circuit board 900 is attached to the board holding portion 820 by screwing the screw 905 into the screw hole 823.

  Returning to FIG. 4, when the lamp unit is attached, first, the lamp 500 is mounted on the box portion 610 of the lamp holder 600. Next, the circuit board 700 is mounted on the board holding part 640 of the lamp holder 600. Referring to FIG. 5A, the circuit board 700 is mounted by placing the circuit board 700 on the mounting portion 644 while fitting the notches 703 and 704 into the L-shaped locking portion 642. This is done by screwing the screw 710 into the screw hole 643. At this time, the screw 710 is screwed into the screw hole 643 so that there is a slight gap between the screw 710 and the upper surface of the circuit board 700. As a result, the circuit board 700 is mounted on the board mounting portion 640 in a state that can be displaced by a predetermined stroke in the X-axis direction and the Z-axis direction.

  Returning to FIG. 4, on the other hand, on the main chassis side, the circuit board 900 is mounted on the board holding portion 820. Referring to FIG. 5B, the mounting of the circuit board 900 is performed by fitting the notch 901 and the hole 902 to the two pins 822, while the notch 824 and the base pedestal of the pin 822 are provided. 822a. The upper surface of the pedestal portion 822a and the upper surface of the notch 824 have the same height. Thereafter, the screw 905 is screwed into the screw hole 823.

Here, the notch 901 and the hole 902 engage with the pin 822 without substantial play. Therefore, when the circuit board is placed on the notch 824 and the pedestal portion 822a at the root of the pin 822 as described above, the circuit board 900 is positioned with respect to the board holding portion 820 in the X-axis direction and the Z-axis direction. The screw 905 is screwed into the screw hole 823 until it is pressed against the upper surface of the circuit board 900. As a result, the circuit board 900 cannot be displaced in the Y-axis direction and is positioned in the Y-axis direction.

  FIG. 7 is a view showing a state where two circuit boards 700 and 900 are mounted on the board holding portions 640 and 820, respectively. Thereafter, the lamp holder 600 is attached to the holder housing portion 800 by pushing the back surface of the box portion 610 into the box mounting portion 811 while being in contact with the guide portion 814.

  Note that the distance between the front inner surface of the box mounting portion 811 and the guide portion 814 is slightly larger than the length of the box portion 610 in the X-axis direction. Therefore, the lamp holder 600 is housed in a predetermined position of the holder housing portion 800 by pushing the back surface of the box portion 610 into the box mounting portion 811 while abutting the guide portion 814.

  When the lamp holder 600 is pushed into the box mounting portion 811 in this way, the tips of the two pins 812 on the holder housing portion 800 side are on the lamp holder 600 side before the lamp holder 600 reaches a predetermined position in the holder housing portion 800. The tips of the two pins 622 on the lamp holder 600 side are inserted into the two holes 813 on the holder housing portion 800 side. At the same time, the tips of the two pins 822 projecting from the board holding part 820 are inserted into the two holes 701 of the circuit board 700.

  Here, since the ends of the pins 812 and 622 are both tapered, when the lamp holder 600 is further pushed into the box mounting portion 811 from this state, the lamp holder 600 has the tips of the pins 812 and 622. It is guided to the inclination of and is positioned at a predetermined position. Thus, the optical axis of the lamp 500 mounted on the lamp holder 600 is optimized with respect to the subsequent optical system.

  Further, since the tapered inclined portion 822b (see FIG. 5B) is also formed at the end of the pin 822, the lamp holder is further removed from the state where the pin 822 is inserted into the hole 701 as described above. When 600 is pushed into the box mounting portion 811, the circuit board 700 is guided by the inclined portion 822 b at the tip of the pin 822 and displaced in the X-axis direction and the Z-axis direction. As a result, the connector 706 disposed on the circuit board 700 correctly faces the connector 903 on the circuit board 900 side, and then the lamp holder 600 is further pushed in, so that the connector 706 and the connector 903 are joined. .

  FIG. 8A is a view showing a state when the lamp holder 600 is completely pushed into the box mounting portion 811. FIG. 8B is a perspective view showing a state in the vicinity of the substrate housing portions 640 and 820 at that time, and FIG. 8C is a perspective view in a state where the substrate 700 is removed in FIG. 8B. .

  As illustrated, in a state where the lamp holder 600 is completely pushed into the box mounting portion 811, the lamp 500 is positioned, and the connector 706 of the circuit board 700 and the connector 903 of the circuit board 900 are joined.

FIG. 9 is a cross-sectional view taken along line AA ′ of FIG. Before the connector 903 on the circuit board 900 starts to be joined to the connector 706 on the circuit board 700, the length of the pin 822 is fitted to the hole 701 of the circuit board 700 from the tip of the pin 822. Designed to be as long as possible. By doing so, when the connector 706 and the connector 903 start to be joined, the positioning between the two connectors is completed, and the connector 706 and the connector 903 can be joined smoothly.

  FIG. 10 shows a circuit configuration of the projector according to the present embodiment. In the figure, only the configuration related to the lamp units 10a and 10b and the mirror unit 10c is shown, and the other configurations are omitted.

  The lamp power supply 51 supplies power for driving the lamp to the relay circuit 52 in accordance with a control signal from the controller 54. The lamp power source 51 monitors the voltage applied to the lamp 500 to determine whether the lamp is lit and supplies the determination result to the controller 54. Specifically, a determination result indicating that the lamp is turned on when the applied voltage is less than a predetermined threshold is supplied to the controller 54, and the lamp is turned off when the applied voltage exceeds the predetermined threshold. A determination result indicating that the data is present is supplied to the controller 54.

  The relay circuit 52 supplies power from the lamp power supply 51 to the lamp instructed by the controller 54 of the lamp units 10a and 10b. The relay circuit 52 receives signals from the detection switches 301 and 302 disposed in the mirror unit 10c. When the mirror 201 in the mirror unit 10 c is directed toward the lamp unit 10 a, the detection switch 301 is turned on, and an ON signal is input from the detection switch 301 to the relay circuit 52. On the other hand, when the mirror 201 is directed toward the lamp unit 10 b, the detection switch 302 is turned on, and an ON signal from the detection switch 302 is input to the relay circuit 52.

  Even if a control signal for supplying power to the lamp unit 10a is input from the controller 54, if the ON signal is not input from the detection switch 301, the relay circuit 52 supplies power from the lamp power source 51 to the lamp unit 10a. Similarly, even if a control signal for supplying power to the lamp unit 10b is input from the controller 54, if the ON signal is not input from the detection switch 302, the power from the lamp power source 51 is supplied to the lamp unit 10b. The circuit is configured not to supply.

  The mirror driver 53 drives the mirror unit 10 c in response to a control signal from the controller 54. When the mirror unit 10c is driven, the controller 54 monitors the signals from the detection switches 301 and 302 disposed in the mirror unit 10c. Then, after an ON signal is input from the detection switch in the driving direction, a control signal for further driving the mirror 201 in the driving direction is supplied to the mirror driver 53 for a certain period. This ensures that the mirror 201 is positioned at the desired switching position.

  When such control is executed, the motor 404 continues to be driven even after the back surface of the mirror holder 200 comes into contact with the adjustment plate 203. However, in this case, since the driving force of the motor 404 is absorbed by the torque limiter 402 as described above, problems such as damage due to overload of the motor 404 and angular deviation of the mirror 201 due to distortion of the mirror holder 200 do not occur.

  The controller 54 includes a CPU (not shown) and a switch 54a, and controls each unit according to a control program stored in advance. The switch 54a connects any one of the circuit units 705 arranged in the lamp units 10a and 10b to the data bus in the controller 54, respectively. The controller 54 switches the switch 54a to establish a communication path with one of the circuit units 705 arranged in the lamp units 10a and 10b. Then, lamp management information is acquired from the circuit unit 705 via the communication path, and the acquired management information is stored in the memory 55.

  The configuration and control operation relating to communication between the controller 54 and the circuit unit 705 disposed in the lamp units 10a and 10b will be described in detail later with reference to FIGS.

  In the configuration of FIG. 10, when one of the lamps is driven and the lamp is burned out, a signal indicating this is input from the lamp power supply 51 to the controller 54. In response to this, the controller 54 stops power supply to the lamp power supply 51 and then supplies a control signal to the mirror driver 53 for rotating the mirror 201 to a position where the light from the other lamp is reflected. Thereby, the mirror 201 is rotated.

  Thereafter, when the mirror 201 is rotated to an appropriate position, an ON signal is supplied to the controller 54 from one of the detection switches 301 and 302. The controller 54 outputs a control signal for starting power supply to the lamp power source 51 after the predetermined period has elapsed after receiving the ON signal, and at the same time, controls for supplying power to the relay circuit 52 to the other lamp. Output a signal. As a result, the other lamp is turned on and image projection is resumed.

  Next, a configuration related to communication between the controller 54 and the circuit unit 705 disposed in the lamp units 10a and 10b will be described with reference to FIG.

  4A is a system block diagram of the controller 54 and the circuit unit 705, FIG. 2B is a diagram showing the contents of lamp management information stored in the storage units 71a and 71b, and FIG. It is a figure which shows the structure of use history data among lamp management information. In FIG. 9A, the connectors 706 and 903 interposed between the switch 54a and the circuit unit 705 and the intermediate circuit board 900 are not shown.

  As shown in FIG. 5A, the circuit unit 705 of the lamp units 10a and 10b includes control units 70a and 70b and storage units 71a and 71b. The control units 70a and 70b control data writing / reading with respect to the storage units 71a and 71b. The storage units 71a and 71b store data shown in FIG. 5B as lamp management information.

  Here, the lamp identification information is data for identifying the lamp 500 mounted in the lamp units 10a and 10b, and includes data relating to the manufacturer name, model, and the like of the lamp 500, for example. The accumulated time data is data indicating the accumulated accumulated time of the lamp 500. In addition, the “use accumulated time” is a total use time after the lamp 500 is used for the first time after manufacture, and is obtained by adding up all the lights that have been lit up to the present after the first use. .

  The usage history data includes a flag relating to malfunction and a flag relating to availability as shown in FIG. Here, the flag relating to the malfunction is set to “1” if the lamp 500 has never been lit in the past, and is set to “0” if it has not been lit at all. . In addition, the flag relating to availability is set to “1” when the lamp 500 has been disabled because it has not been turned on a predetermined number of times in the past, and is set to “0” otherwise.

  Returning to FIG. 5A, the controller 54 includes a communication control unit 61, a storage unit 62, a lighting / extinguishing detection unit 63, a time measurement unit 64, a calculation unit 65, a usability determination unit 66, and a notification. Unit 67 and availability update unit 68.

The communication control unit 61 controls the switch 54a to switch the lamp units 10a, 10
A communication path is established with any one of the circuit units 705 arranged in b. And the said lamp | ramp management information is acquired from the memory | storage parts 71a and 71b of the circuit part 705 which established the communication path.

  The storage unit 62 stores the lamp management information acquired by the communication control unit 61. The lamp management information stored in the storage unit 62 is updated at any time by processing by the calculation unit 65 and the availability update unit 68 when the lamp is used. The storage unit 62 sets a storage area for lamp management information in the memory 55.

  The lighting / extinguishing detection unit 63 determines the lighting start and lighting end of the lamp 500 to be lit based on the lamp lighting determination result supplied from the lamp power supply 51. Specifically, during the driving operation of the lamp 500, it is detected that the lighting of the lamp 500 is started at a timing when a determination result indicating that the lamp 500 is in a lighting state is supplied from the lamp power source 51. The end of lighting of the lamp 500 is detected at a timing when a determination result indicating that the lamp 500 is turned off is supplied from the power source 51. When the lighting operation of the lamp 500 is finished, such as when the lamp 500 is switched or when the projection operation is finished, the lighting / light-off detecting unit 63 turns off the lamp 500 at the timing when the power supply to the lamp 500 is stopped. Is detected.

  The time measuring unit 64 starts time measurement when the lighting start signal from the lighting / light extinguishing detection unit 63 is input, and delivers the measurement result to the calculating unit 65 at regular time intervals. In addition, when the lighting end signal from the lighting / light extinguishing detection unit 63 is input, the time measuring unit 64 ends the time measurement and passes the measurement result at the end point to the calculation unit 65.

  The computing unit 65 updates the accumulated time data based on the accumulated time data in the lamp management information stored in the storage unit 62 and the measurement result of the elapsed time input from the time measuring unit 64, and the updated accumulated time. Data is written back to the storage unit 62.

  The usability determination unit 66 refers to the lamp identification data in the lamp management information stored in the storage unit 62 to determine whether the lamp 500 to be lit is suitable for itself (projector), and notifies the determination result of the determination result 67. Pass to. The usability determination unit 66 holds in advance a list of lamp identification data of lamps suitable for itself (projector). Depending on whether the lamp identification data stored in the storage unit 62 is included in the list, Whether the lamp 500 can be adapted is determined.

  Further, the usability determination unit 66 determines whether or not the lighting target lamp 500 is usable by referring to the use history data in the lamp management information stored in the storage unit 62, and delivers the determination result to the notification unit 67. . Specifically, referring to the availability flag in the usage history data (see (c) in the figure), if the availability flag is “1”, it is determined that the lamp 500 cannot be used.

  When the determination result from the usability determination unit 66 indicates nonconformity or unusability, the notification unit 67 performs a process for notifying the user of that fact. For example, the notification is displayed on the display unit of the projector or is output by voice. When the lamp unit to be lit is incompatible with the projector or cannot be used in this way, the lamp unit is not lit and the above notification is given to the user.

The availability update unit 68 updates the usage history data in the lamp management information stored in the storage unit 62 according to the usage status of the lamp 500. That is, the availability update unit 68 does not supply a determination result indicating that the lamp 500 is in the lighting state from the lamp power source 51 at the start of the lighting operation of the lamp 500, or during the lighting operation, In response to the determination result indicating that the lamp 500 is turned off from the power supply 51, the usage history data stored in the storage unit 62 is referred to. When the malfunction flag is “0”, the availability update unit updates the malfunction flag to “1”, sets the number of malfunctions to 1, and the malfunction flag is already “1”. In this case, 1 is added to the number of malfunctions, and the availability flag is set to “1” if the number after the addition exceeds the threshold number.

  When the usage history data is updated in this way, the communication control unit 61 writes the update result back to the storage units 71a and 71b of the corresponding lamp units 10a and 10b. In addition, when a failure occurs in the lighting of the lamp 500 as described above, the lighting of the lamp 500 is stopped.

  Next, with reference to FIG. 12, an update processing operation for the accumulated usage time will be described. Note that the processing flow in the figure is performed when the lamp management information can be read from the lamp unit 10a or 10b, and the lamp management information cannot be read from the lamp unit 10a or 10b. The process shown in FIG. 13 is performed.

  When the projection operation is started by an operation input from the user (S101: YES), the communication control unit 61 establishes a communication path with the circuit unit 705 of the lamp unit 10a or 10b to be turned on (S102). ). Then, the communication control unit 61 communicates with the circuit unit 705 that established the communication path (S103), reads lamp management information from the storage unit 71a or 71b of the circuit unit 705 (S104), and uses the read lamp management information. The storage unit 62 is initialized (S105).

  Thereafter, the usability determination unit 66 refers to the lamp identification data and the use history data (usability flag) in the lamp management information stored in the storage unit 62, and as described above, the lamp unit 10a or 10b to be lit. Is compatible with itself (projector) and is usable (S106). Here, if it is incompatible or unusable (S106: NO), the lamp unit is not turned on as described above, and notification that the lamp unit is unusable is made (S107). On the other hand, if it is not incompatible or not usable (S106: YES), lighting of the lamp unit 10a or 10b is started (S108).

  Thus, when the lighting of the lamp unit 10a or 10b to be lit is started, the elapsed time measurement by the time measuring unit 64 is started. At the same time, the calculation unit 65 updates the accumulated usage time of the lamp unit 10a or 10b based on the measurement time by the time measurement unit 64 and the accumulated time data stored in the storage unit 62. Then, the updated accumulated usage time is overwritten in the storage unit 62 as needed, and written back to the storage unit 71a or 71b of the lamp unit 10a or 10b (S109). The update storage of the accumulated usage time is continued until the lamp unit 10a or 10b is turned off (S110: YES), or the lamp unit to be lit is switched by the user or automatically (S111: YES). The

  When the lighting operation of the lamp unit 10a or 10b is stopped due to a malfunction of the lamp unit or by a user command (S110: YES), the lighting of the lamp unit 10a or 10b is ended (S112). Here, the termination due to the malfunction is performed based on the determination result from the lamp power supply 51 as described above. In this case, as described above, the usage history data is updated by the availability update unit 68, and the updated usage history data is written back to the storage unit 71a or 71b of the lamp unit 10a or 10b.

When the lighting of the lamp unit 10a or 10b is finished in S112, the measurement of the elapsed time and the calculation of the use accumulated time in the time measurement unit 64 and the calculation unit 65 are finished, and the use accumulated time at that time is calculated by the lamp unit 10a or 10b is written back to the storage units 71a and 71b (S113). Thereafter, the communication path is released (S114), and the process ends.

  On the other hand, when it is determined in S111 that the lamp unit to be used has been switched (S111: YES), the lighting of the lamp unit 10a or 10b is ended (S115). In response to this, the measurement of the elapsed time and the calculation of the accumulated usage time in the time measuring unit 64 and the computing unit 65 are terminated, and the accumulated usage time at that time is written back to the storage units 71a and 71b of the lamp unit 10a or 10b. (S116). Then, the communication path is released (S117), the process returns to S102, and the processes after S102 are performed on the lamp unit 10a or 10b after switching.

  Next, a process when the lamp management information cannot be read from the lamp unit 10a or 10b will be described with reference to FIG.

  As in the case of FIG. 12, when the projection operation is started by an operation input from the user (S101: YES), the communication control unit 61 communicates with the circuit unit 705 of the lamp unit 10a or 10b to be turned on. A communication path is established (S121). If a communication path can be established within a certain time (S123) (S122: YES), the process proceeds to S103 in FIG. 12, and the communication control unit 61 communicates with the circuit unit 705 that has established the communication path. In this case, the process after S104 of FIG. 12 is performed.

  If the communication path cannot be established within a certain time (S122: NO, S123: YES), the controller 54 turns on the lamp unit 10a or 10b to be lit in the low power consumption and low illuminance mode (S124), A message indicating that an appropriate lamp unit is not mounted and an image for allowing the user to select whether or not to continue lighting the lamp unit are displayed on the projection screen (S125). In response to this, a selection input is made by the user via the remote controller or the body key (S126: YES), and if this selection input instructs to stop lighting (S127: YES), the controller 54 The unit is turned off and the projector is set to a standby state (S128).

  On the other hand, if the selection input from the user instructs to continue lighting (S127: NO) or if the selection input from the user is not made within a certain time (S126: NO, S129: YES), the controller 54 When the lamp unit is used on the projection screen, a message indicating that the function of the projector is limited and an image for allowing the user to select whether or not to continue lighting the lamp unit are displayed (S130). ).

  Note that the functions restricted in this case include the light emission mode and lighting switching mode of the lamp unit. For example, the light emission mode of the lamp unit is fixed to the low illuminance and low power consumption mode, and the lamp unit is predetermined. The automatic switching mode that is automatically switched according to the control (for example, every predetermined time) cannot be set, and a message is presented to the user that the lamp unit to be lit is fixed to the currently lit lamp unit.

  In response to this message, a selection input is made by the user via the remote controller or the body key (S131: YES), and if this selection input instructs to stop lighting (S132: YES), the controller 54 The lamp unit is turned off and the projector is set to a standby state (S128). On the other hand, if the selection input from the user instructs to continue lighting (S132: NO), or if the selection input from the user is not made within a certain time (S131: NO, S133: YES), the controller 54 The lamp unit is kept lit according to the above-mentioned function restriction (S134).

  As described above, according to the present embodiment, the storage units 71a and 71b for storing the lamp management information are arranged in the lamp units 10a and 10b, and the lamp management information held in the storage units 71a and 71b is stored in the lamp units 10a and 10b. Therefore, the lamp management information reflecting the past usage history can be held in the lamp. Therefore, when the lamp units 10a and 10b are used, it is possible to appropriately control the lamp lighting based on the lamp management information reflecting the past usage history.

  In this embodiment, since the accumulated usage time of the lamp is held as the lamp management information, the lamp life can be determined based on this information, for example. Then, according to the determination result, for example, it is possible to notify the user of the end of life or the remaining amount of life, or to perform control such as automatically switching the lamp unit to be used.

  Further, in the present embodiment, since information (usage history data) relating to the availability of the lamp is held as the lamp management information, as described above, the availability of the lamp unit is determined when the lamp unit is used. can do. If the determination result is unusable, the lamp unit can be prevented from being turned on. Thereby, useless lighting operation of the lamp can be avoided.

   Further, in the present embodiment, since lamp identification data for identifying the lamp is held as the lamp management information, the lamp unit is adapted to itself (projector) when the lamp unit is used as described above. Can be determined. When the determination result is incompatible, the lamp unit can be prevented from being turned on. As a result, it is possible to avoid a lighting operation for a non-conforming lamp and prevent damage to the lamp.

  Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. The embodiment of the present invention can be variously modified in addition to the above.

  For example, in the above embodiment, a projector capable of mounting two lamp units is taken as an example, but the number of lamp units mounted may be one, or may be three or more. The lamp unit according to the present invention can also be applied to products other than projectors.

  In the above embodiment, the three types of data shown in FIG. 11B are shown as the lamp management information for managing the lamp unit. However, other information can be included in the lamp management information. It is. For example, information related to the characteristics of the lamp, such as lamp illuminance and color unevenness, can be included as lamp management information. In this way, the projection image can be appropriately corrected based on this information on the projector side, and the quality of the projection image can be improved.

  In addition, information regarding the name of the lamp unit, the use start date, the operation state, and the like can be appropriately included in the lamp management information by the user. Such information can be input, for example, via the operation unit of the projector, or can be written from a personal computer via a dedicated interface. In this way, the user can appropriately confirm the unique information of the lamp unit, and the convenience for the user can be improved.

Furthermore, in the above-described embodiment, the lamp management information is read from the lamp unit to be used for each use, and the storage unit 62 is initialized with the read management information. However, the capacity of the storage unit 62 is sufficiently large. For example, the lamp management information may be read out and stored in the storage unit 62 when the two lamp units 10a and 10b are mounted.

  In addition, in the said embodiment, although the circuit board 900 for relaying to a main board | substrate was distribute | arranged to the holder accommodating part 800, it respond | corresponds to the board | substrate holding | maintenance part 640 by the side of the lamp holder 600 near the holder accommodating part 800. If it is possible to arrange the main board at a position, a connector that joins the connector 706 of the lamp holder 600 may be arranged at this position on the main board. In addition to the form shown in the above embodiment, the connector part of the present invention has a form in which two connectors attached to wirings respectively drawn from the main board side and the lamp holder side are joined to each other with fingers. You can also.

  The embodiments of the present invention can be appropriately modified in various ways within the scope of the technical idea shown in the claims.

10a, 10b ... Lamp unit 500 ... Lamp 600 ... Lamp holder 640 ... Substrate holding part 700 ... Circuit board 705 ... Circuit part (lamp side circuit part)
706 ... Connector 800 ... Holder housing part 820 ... Board holding part 900 ... Circuit board 903 ... Connector 54 ... Controller (main body side circuit part)
55 ... Memory (Body side circuit part)
61 ... Communication control unit (update storage unit)
63 ... lighting / extinguishing detection unit (information updating unit)
64 ... Time measurement unit (information update unit)
65 .. Calculation unit (information update unit)
66 ... Usability determination unit (use determination unit, lamp determination unit)
68 ... Usability update part (update storage part)
71a, 71b ... storage unit (storage unit)

Claims (1)

A lamp holder for holding the lamp;
A lamp-side circuit unit arranged in the lamp holder;
A holder accommodating portion for detachably accommodating the lamp holder;
A main body side circuit section arranged on the main body side;
A connector part for electrically connecting the lamp side circuit part and the main body side circuit part;
With
The lamp side circuit unit has a storage unit that stores accumulated time information related to the accumulated accumulated time of the lamp so as to be able to write and read,
The video display device characterized in that the accumulated usage time of the lamp stored in the recording unit can be notified to a user.