JPH06162805A - Lighting fixture - Google Patents

Abstract

PURPOSE: To provide a luminaire capable of quietly operating without a fan, by forming a beam by reflecting visible light from a light source by a reflector, and by permeating and dissipating infrared light through a heat sink. CONSTITUTION: A reflector 42 including a cold mirror is provided in the vicinity of a lamp 40, forming a beam by reflecting a visible part of light generated, its infrared part is permeated. This infrared part dissipates heat through a heat sink 52 equipped with a fin 57. On the other hand, the beam is led into a housing and projected by passing it through a multi-color filter 20 mounted to a cylindrical frame 10. The carrier 102 of this filter 20 is mounted to a hub 139, and is driven by a motor. The motor mount 124 of this motor is equipped with a heat sink 125 and has low thermal conductivity. This luminaire having variable parameters mentioned above can be operated at a low noise without providing a fan as a cooling device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to entertainment lighting fixtures, and more particularly to automated fixtures having a motorized mechanism.

The description of the present specification is based on the priority of the present application in US patent application Ser. No. 07 / 940,664 (19).
(Filed on Sep. 4, 1992), and the contents of the description of the US patent application constitute a part of the present specification by referring to the number of the US patent application. I shall.

[0003]

BACKGROUND OF THE INVENTION Conventional fixed focus luminaires typically have a Par 64 lamp with an integral reflector.
10; like a parabolic aluminum reflector)
It includes a 00 watt incandescent lamp, which is mounted in a tubular metal housing suspended on a metal yoke. The lamp produces a high intensity beam that includes a visible portion and a potentially damaging infrared portion. Refractory materials must be used in the housing to avoid damage from heat or frequent replacement.

The instrument is hung from a pipe or truss suspended above the stage and can be manually adjusted for orientation and height (focus). The instrument focus then remains fixed throughout the performance. A frame, typically mounted at one end of the lamp housing, carries a sheet or "gel" of colored plastic used to impart a particular color to the light beam. The gel was mounted manually and the color of the beam remains fixed throughout the performance. If the sheet or gel burns due to the heat from the beam, the sheet or gel needs to be replaced, which is not a trivial task when the instrument is suspended, especially when performance is required. Absent.

More recently, conventional fixed focus luminaires have been equipped with a motorized gel exchange mechanism to change the color of the light beam during performance. Such a gel exchange mechanism includes a motor for winding and unwinding a convoluted gel scroll, and a control electronics responsive to a control signal input for positioning the selected gel in front of the light beam. It may include a device. Therefore, there is a need for a fan to provide forced air cooling for the gel scroll, control electronics and motor. Without a fan, the high temperature inside the lamp housing would cause the gel to burn or the electronics to fail.

The automated illuminator includes within its housing a motorized mechanism for changing a number of parameters. For example, a motorized yoke assembly can be used to adjust the orientation and height of the lamp housing. A motorized mechanism that moves the glass color filters is used to adjust the color of the light beam, and a lens and other beam shaping device coupled to the motorized mechanism changes the size and shape of the light beam. Used to adjust. Control electronics responsive to the control signal input may be included in the lamp housing and / or the motorized yoke assembly. Multiple fans are typically required to cool the motors and electronics, as well as to cool the various components of the powered mechanism.
Louvers and baffles are included in the illuminator to allow hot air to exit the lamp housing while preventing stray light rays from exiting in any direction.

The disadvantages of controlled air cooling in entertainment luminaires become apparent when applied to things such as stage performances or operas where the sound produced by the performers is at a relatively low level. Become. The noise generated by fans built into the luminaire is not noticeable at loud rock concerts and country music shows, but is distracting at stage performances, classical music performances and the relatively quiet moments of opera. Will be things. However, reliable operation of automated illuminators without forced air ventilation from fans and other improved thermal management designs may not be feasible if that is not possible.

[0008]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an automated luminaire having multiple parameters including a fanless and improved thermal management design so that the luminaire can operate quietly. To do.

[0009]

SUMMARY OF THE INVENTION In accordance with the present invention, an automated illuminator having a number of adjustable parameters, including position, color and beam shaping mechanism, actuated by control electronics responsive to control signal inputs. Includes a high power light source mounted in a cold mirror reflector coupled to a heat sink with external fins. Ventilation holes located substantially through the lamp housing allow free airflow through the housing. An electric motor mounted in the lamp housing is supported by a thermally isolated motor mount and is provided with a finned heat sink. A heat shield is provided between the bulkhead of the color filter mechanism and the actuator coupled thereto, and between the lamp housing and the motorized yoke assembly including the control electronics and the powering mechanism for remotely positioning the lamp housing. It has been placed.

A first aspect of the present invention includes a light source for generating light having a visible portion and an infrared portion, an inner frame, and first and second end portions, the light source being the first end portion. A housing surrounding the light source and a reflector disposed near the light source for reflecting a portion of the light to form a beam projected toward the second end, the visible portion of the light A reflector including a cold mirror capable of reflecting and transmitting an infrared portion, a heat sink disposed in the vicinity of the reflector to dissipate heat from the infrared portion of the light transmitted through the reflector, and A movable color filter mechanism mounted on the frame in the path for changing the color of the beam, and at least one motor for driving the color filter mechanism are provided.

A second aspect of the present invention is a housing for enclosing a light source in a free air flow environment, and a reflection means for reflecting the light from the light source to form a light beam. Reflector means including means for passing heat rays;
Means for dissipating heat from the reflector and the light source;
A movable color filter means arranged in the path of the beam for changing the color of the beam, means for selectively changing the beam, motor means for driving the color filter means, and generated by the motor means It further comprises means for dissipating heat and means for isolating the air flow environment surrounding the motor means from the air flow environment surrounding the color filter means.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Referring to FIG. 1, a rotary filter module or subassembly 2 forming part of the luminaire of the present invention will be described. The subassembly 2 is constructed in a tubular frame (shown in dashed lines) 10 having a longitudinal or main axis 12 extending from an inlet opening 14 to an outlet opening 16. The three filters 20 have the main axis 12
Is supported for rotation about respective axes 18, which preferably intersect the main axis 12 to provide a radial alignment when viewed from either end of the. The filter 20 has a dichroic property (dich) having the same optical characteristics.
roic) filter and is provided near the axis 12 in FIG.
And rotatably supported, as described below with reference to FIG. The filter 20 is supported at its outer end by a gear wheel 22 interconnected by a suitable drive mechanism such as a ring gear 24, all wheels rotating simultaneously and at the same angular velocity.

The filters 20 can be rotated about their axes 18 from the closed position shown in FIG. 1 to an open position that is substantially parallel to the main axis 12. The filter 20 can be rotated in all intermediate positions between the two positions mentioned above. In the sub-assembly 2, all the filters in the sub-assembly 2 have the main axis 1
It is characterized by being present at the same angle with respect to the light beam passing through the filter parallel to 2.

The subassembly 2 receives the white light beam through the entrance aperture 14, selectively changes the color of the light beam as it passes through the filter 20, and sends the colored light beam through the exit aperture 16. It will be appreciated that when the dichroic filter 20 is in the closed position, substantially all rays of the light beam are blocked by the filter. The dichroic filter 20 has a longitudinal axis 12
When rotated to the other extreme position, which is parallel to, essentially none of the rays of the light beam are blocked by the filter. By positioning the filter 20 at selected locations between such extremes, the hue and saturation of the resulting light beam can be altered in a controlled manner.

The dynamic color change effect achieved by the present invention is determined by the characteristics of the dichroic filter. U.S. Pat. No. 4,392,187 discloses changing the angle of incidence of a dichroic filter on a light beam to cause the color spectrum sent through the filter to be changed. A dichroic filter operates on the principle of interference, which basically separates two colors from a white light source, one color being transmitted and the other color being the complement of the transmitted color being reflected. The color transmitted through the dichroic filter depends on the types of materials used in the filter layers and their refractive indices, the thickness of each layer, the number of layers, and the angle of incidence of the white light source impinging on the surface of the filter. By varying the angle of incidence of the filter, a preselected range of colors can be generated.

The dichroic filter used in the present invention may comprise a number of commercially available filters made by coating glass or the like with a dielectric film. Dichroic filters are made of multiple layers with alternating layers having low and high refractive indices, respectively.

Referring to FIG. 2, three subassemblies or modules 2, 4 and 6 abut to form a single tubular array and are in optical series with a frame (shown in dashed lines) 10. Connected in a relationship. Each module has a set of three dichroic filters that can be rotated in the manner described above with respect to the filter 20 of FIG.

The filter set of FIG. 2 is shown rotated to different positions. Module 2 shows a filter set A with the filter in the closed position substantially blocking all light rays passing through it.

Module 4 shows a filter set B whose filters are aligned substantially parallel to the longitudinal axis 12. This position will henceforth be referred to as the open position, where the filter essentially does not block any rays passing through the module.

Module 6 shows a filter set C whose filter is arranged in an intermediate position between the open and closed positions. The actual intermediate position shown in FIG. 2 is such that the faces formed by the filter set C are each arranged at an angle of 45 ° with respect to the longitudinal axis 12.

In the embodiment shown in FIG. 2, all filters of each set have axes of rotational movement which intersect the main axis 12 at a common point. In the preferred embodiment, the axis of rotational movement of each set of filters forms a radial surface. The present invention also contemplates various alternatives in which the filters of each set are offset in position so that their axes do not intersect the main axis 12 at a common point. In one such form, the axes of rotational movement of the filters within each set are slightly spaced along the main axis 12 so that, in their closed position, they have the appearance of a staircase in a spiral staircase. is doing.

In the preferred arrangement, the filters of set A consist of long-wave pass amber filters, the filters of set B consist of short-wave pass blue filters, and the filters of set C consist of multicolor magenta filters. In such an arrangement, the luminaire can produce a large selection of beam colors due to the combined effect of the three filter sets in series.

If the filter in the module 6 is located at an intermediate position other than the position range close to the closed position, at least some white light passes through the module 6. Similarly, the white and colored light emitted by module 6 will partially pass around the filter of module 4 unless the filter of module 4 is in the closed or close position. The same applies to the light passing through the module 2.

A preferred drive mechanism for rotating the filter 20 will be described with reference to FIG. Each set of three filters is rotated under the control of a bidirectional step motor 26 mounted in a suitable manner (not shown) on the frame 10. The shaft 28 of the motor 26 is terminated by the worm gear 3
It is 0. The worm gear 32 is mounted on one of the filter support wheels 22 by a drive shaft 34. Each filter support wheel 22 has outer peripheral teeth that complementarily mesh with the teeth of the ring gear 24, as schematically shown in FIGS. 2 and 3. Since the filter support wheels 22 are of the same size and each is driven by a ring gear 24 common to each module, all three filters in each module rotate in synchronism. The motor 26 is
It can be excited by a conventional control system (not shown) with a motor drive circuit, a feedback sensor and suitable electronic control circuits. Referring again to FIG. 2, each filter set A, B and C is independently rotatable under the control of a separate drive motor 26.

Referring now to FIG. 4, a luminaire including the assembly of FIG. 2 is shown assembled in a tubular outer housing 48. The housing may have a shape other than the cylindrical shape. The housing 48 provides a means of mounting and protecting the filter module and other components described below. A conventional mount device (not shown) is used. The housing 48 is closed at its front end by a bulkhead 50 and at its rear end by a bulkhead 52.

A lamp 40 and a reflector 42 are mounted on the bulkhead 52 at the back. The lamp 40 and the reflector 42 serve as a light source for projecting a beam of light along the longitudinal axis 12. The beam passes through the first rotating filter set C, then through the rotating filter set B, and finally through the rotating filter set A.

The front glass 54 of the lens body is also the axis 12
Are placed across the beam and intercept the beam of light after the beam has passed through the rotating filter set A. The glass directs the beam to provide wash luminary beam shape characteristics. This glass is
Mounted in an opening centered on the front bulkhead 50.

The luminaire of FIG. 4 is shown in US Pat. No. 4,39.
No. 2,187, may be used as one of the instruments in an automated system. In such systems, means are provided to suspend the luminaire, control its orientation, and control beam parameters such as aperture and intensity. The luminaire of FIG. 4 shows a unique array of rotatable filters that control the color and saturation of the beam.

To control the beam intensity, the lamp 4
0 may be a low voltage incandescent type such as a tungsten-halogen lamp and may be connected to an electronic dimmer (not shown). Alternatively, the lamp 40 may be an arc lamp such as a metal halide discharge lamp, and the brightness or intensity may be adjusted by a conventional mechanical dimmer (not shown) mounted within the housing 48.

A preferred technique for supporting the filter within the tubular frame 10 is shown in FIG. A central support member 60, which is preferably a long aluminum rod having a hexagonal cross section, is supported by the radial arm 62 on the frame 1.
Supported within 0. The arm 62 has a threaded end attached to the member 60. The screw fixture 64
The arm 62 is attached to the frame 10.

Referring to FIGS. 6 and 7, an alternative arrangement with six dichroic filters is shown in FIG.
Are shown arranged radially around. Each filter is attached to the support member 60 at its inner end with a U-shaped clip 66. Each clip 66
Are rotatable with respect to the support member 60. Each filter 2
0 is supported at its outer end by a gear wheel 22. The gear wheel 22 has a U-shaped channel 72 on its inner surface for receiving a filter. The gear wheel 22 is rotatably supported just inside the frame 10 by a bushing 68 attached to the frame wall. Low friction spacer or bearing 7
0 separates the gear wheel 22 from the bushing 68.

Each gear wheel has a hollow shaft 76 which extends through the bearing 70 and extends into the bushing 68. The material of the bushing 68 is selected to minimize friction between the bushing and the shaft 76 of the rotating gear wheel 22.

The gear wheel 22 is for synchronous rotation,
As best shown in FIG. 7, they are connected by a ring gear 24. The ring gear 24 is maintained in engagement with the gear wheel 22 by bearings 78 mounted to the frame by suitable fastening means. To effect rotation, one of the filter support wheels 22 is fitted onto the drive shaft 34. The drive shaft 34 is inserted into the hollow shaft 76 of the selected wheel 22 and secured by a suitable adhesive. Worm wheel 32 is mounted on drive shaft 34 to provide motorized actuation of the rotary filter assembly, as described above with respect to FIG.

The preferred shape of the filter used in the embodiment of FIG. 6 is shown in FIG. The filter 20 is a 6-sided polygon with two parallel sides for the mounts described above. The shape of the filter is such that the light beam is at an intermediate position between the fully closed position of the filter array as shown in FIG. 6 and the 45 degree position (ie, between the fully closed and fully open positions). Has been selected to block almost all rays of light.

It will be appreciated that embodiments of the present invention may be constructed with any number of filters. 1 of FIG.
The six filter embodiment per set is believed to provide the optimum stage luminaire.

The three-per-set filter embodiment of FIG. 4 is more suitable for small truck luminaires for in-office use and is easier to illustrate in perspective than the embodiment of FIG. Those skilled in the art will refer to the three modules of the six filter embodiment of FIG. 6 as modules 2, 4 of FIG.
It will be easy to see the result achieved by substituting 6 and 6.

Associated Actuation Mechanism FIG. 9 shows a luminaire according to another embodiment of the present invention. This embodiment features a selective filter actuation mechanism to provide improved actuation control. As shown in FIG. 9, the luminaire includes a tubular frame 10 and multiple sets of color filters 20 mounted thereto.
Each set of filters 20 is spaced apart along the longitudinal axis of the frame. The filter 20 is supported in the tubular frame 10 by a large filter carrier 100 and a small filter carrier 102.
Each of the large filter carriers 100 has a bushing 70.
Rotate inside. Each of the large filter carriers 100
One of the color filters 20 and the carrier shaft 34
A carrier shaft 34 extends through bushing 70 and through a plurality of openings along frame 10, including a channel 72 for receiving

FIG. 10 is an enlarged view of the outer portion of the frame 10, showing a mechanism for connecting two sets of the color filters 20. A length of spring wire 104 is attached to carrier shaft 34 and extends outwardly through slot 106 at the end of carrier shaft 34. The outwardly extending portion of the spring wire 104 includes a straight portion for connecting and operating with the connecting block 116. Spring wire 104 is preferably made of stainless steel.

Each connecting block 116 is a mount post 1.
17 is rotatably mounted on the ring 108 and includes a hole through which the straight portion of the spring wire 104 extends. The ring 108 surrounds the frame 10 and is rotatably supported on the frame 10 via rollers 110 attached to a plurality of tabs 112 on the ring 108. The roller 110 is attached to the tab 112 by a shaft pin 114 that is driven through a hole formed in the tab. The ring 108 is a semi-flexible glass fiber reinforced polyphenylene sulfide (polyp).
It is preferably made from high temperature thermoplastics (similar to the Ryton material manufactured by Phillips Petroleum) such as henylene sulphide.

In the coupling mechanism described above, rotation of the ring 108 about the center of the tubular frame 10 causes the color filter 20 to rotate about each axis generally transverse to the longitudinal axis of the tubular frame 10. Be understood.

FIG. 11 shows a drive mechanism according to the present invention. The drive mechanism may be a step motor 122 supported by a motor mount 124 mounted on the frame 10. The step motor 122 includes a shaft 121 that is extended or drawn by the forward and reverse rotations of the motor. One end of the shaft 121 is engaged with a flexible bracket 123, preferably made of spring steel. The bracket 123 is attached to the tab 127. The tab 127 is part of the ring 108.
Thus, when the motor 122 is driven in one direction, the shaft 121 extends while pushing the bracket 123 and the tab 127, thereby causing the ring 108 to rotate about the center of the frame 10 or the main axis 12 and about the frame 10. Rotate around the centerline. When motor 122 is rotated in the opposite direction, ring 108 correspondingly rotates in the opposite direction.

The coupling mechanism, including the filter carrier shaft 34, the spring wire 104 and the coupling block 116, allows at least three degrees of freedom of movement. First
In particular, when the ring 108 rotates forward and backward and the connecting block 116 passes over the shaft 34, the connecting block 116 rotates on its mount post 117 to accommodate angular changes between the connecting block 116 and the filter carrier shaft 34.

Second, the distance between connecting block 116 and filter carrier shaft 34 changes as ring 108 rotates. The spring wire 104 passes through the hole of the connecting block 116, but is not attached to the connecting block otherwise. Spring wire 104
The linear portion of is long enough to remain flexibly linked to the rotating connecting block 116 at any extreme movement, thereby accommodating changes in distance.

Third, the angle of height of the connecting block 116 with respect to the end of the filter carrier shaft 34 changes as the ring 108 rotates due to the bending of the frame 10 when viewed from the end of the tubular frame 10. To do. The straight portion of the spring wire 104 is bent slightly to match the changing angle.

With the drive and coupling mechanism according to this embodiment of the invention, the filter 20 is actuated via moving parts with a significantly reduced amount of friction. Thus, the filter 20
And the movement of the filter carrier 100 has very little backlash, especially when compared to the gear drive. Therefore, a more energy efficient actuation mechanism with more accurate actuation control is obtained.

Another improvement resulting from this embodiment is due to the flexibility of ring 108. This eliminates the tubular frame 10 being perfectly circular in its cross section. Therefore, the frame 10 may be made of relatively inexpensive sheet metal instead of precision casting. If the frame 10 is deformed from a slightly circular shape, the semi-flexible ring 108 compensates for small distortions in the shape of the frame over the slightly changing surface on the rollers 110.

Referring again to FIG. 10, the semi-flexible ring 108 includes a plurality of slots 128 through which guide posts 130 can be inserted. The guide post 130 is a carrier mount bracket 13 mounted on the frame 10.
It is attached to 2. Ring 108 is tubular frame 1
The slots 128 and guide posts 130 maintain the longitudinal position of the ring 108 and limit the amount of movement of the ring 108 about the frame 10 when rotated substantially coaxially with zero.

Thus, the ring 108 is maintained in approximately the same longitudinal position so that the spring wire 104 does not slip out of the hole in the rotating connecting block 116. The amount of movement of the ring 108 depends on the slot 128 and the guide post 13.
Being physically limited by 0, the ring 108 is not overdriven to the extent that the rotating coupling arrangement is damaged.

The large color filter carrier 100 also incorporates movement limiting features. As shown in FIG. 13, the large filter carrier 100 includes two moving end stoppers 140 and 142 integrally formed to limit the rotation range of the filter 20. The angle between the two stoppers is carefully chosen so that the color filters 20 are parallel to the longitudinal axis 12 when fully open and do not contact each other when fully closed.

Referring again to FIG. 10, slot 128
The length of is carefully selected so that the ring 108 is driven in the open direction slightly more than the filter carrier 100 is rotated. In such a case, the spring wire 104 will bend slightly and the flexible connection will not be damaged. The stepper motor 122 may be controlled by a microprocessor and memory based control system.
An example of such a control system is US Pat.
Those described in No. 0806 (Taylor et al) can be used.

When the control system is initialized,
The motor control subsystem calibrates the mechanism by driving the stepper motor 122 in the direction that the color filter 20 opens. The motor is driven to a physical end stop to ensure that all color filters 20 have been set to a known position parallel to the main longitudinal axis 12 of the luminaire. The motor control subsystem simply drives the stepper motor for a number of steps slightly greater than the number of steps required for the entire travel range, and then starts counting and recording the number of movement steps. No edge sensor is needed. The control system maintains in memory a record of the current position of the corresponding filter set. As such, the filter can be driven in open loop, eliminating the need for moving end sensors and control circuit interfaces for such sensors.

Another feature of the invention relates to the mounting arrangement of the filter 20 and the miniature filter carrier 102.
FIG. 12 is an enlarged view of the hub 139 of the lighting fixture or a portion in the vicinity thereof. As shown in FIG. 12, the hub 139 is suspended in the frame 10 by a support rod 134. The hub 139 includes a number of holes 136 through which the miniature filter carrier 102 is inserted. A compression device mounted within the hub 139, such as a finger spring 138, provides a compact filter carrier 102, filter 2
0 and the large filter carrier 100 are pressed against the end of the small filter carrier 102 to press against the bushing 70 mounted on the inner surface of the frame 10. The finger springs 138 maintain radial alignment of the coupling mechanism including the coupling block 116 and the spring wire 104.

The present invention also contemplates applications beyond stage lighting. For example, a large illuminator such as a searchlight that illuminates the night sky with beams of different colors can be constructed using the techniques described above. In such an embodiment of the invention, multiple rotary filters are considered to minimize the axial dimensions of the filter assembly. It will be appreciated that the disclosed radial array of filters is ideally suited for the projection of circular light beams, providing economic and performance advantages over square or rectangular filter arrays.

Thermal Management Technology FIG. 14 illustrates the thermal management features of the present invention. The fixture includes a lamp housing 48 suspended within a motorized yoke assembly 165. The lamp housing of the present invention is preferably about 10 inches in diameter and about 16 inches long. FIG. 15 shows a cross-sectional view of the interior of the device according to the invention. Light source 40, eg 1
A 000 watt incandescent lamp is mounted in a reflector 42 that produces a light beam that includes a visible portion and an infrared portion.

The reflector 42 is preferably made of heat-resistant glass and is preferably coated on its side facing the lamp 40 with a multilayer dielectric film, a cold mirror (reflecting visible light but allowing heat rays to pass through the film). cold
forming a mirror). For reflectors coated with cold mirrors along with other beam conditioners,
It is described in Applicant's US Patent Application No. 693,366 entitled "Improvement of High Intensity Light Projector", the contents of which are also incorporated herein by reference.

The reflector 42 is thermally connected to a heat sink 52, which is preferably made of cast aluminum. Preferably, the contact areas of the heat sink 52 and the reflector 42 may be finished somewhat flat to provide good thermal contact.

The rear surface of the glass reflector is located near the body of the heat sink. Most of the heat rays going to the reflector pass through the film and glass substrate of the reflector 42 and hit the heat sink 52. The heat sink 52 absorbs it as heat. A small amount of heat rays are absorbed by the glass substrate of the reflector 42 and radiated through the ventilation holes and by radiation to the heat sink 52.

The sheet sink 52 includes a plurality of fins 57 formed on the rear portion thereof, thereby increasing the surface area for heat radiation and increasing free convection. The protruding fins 57 are oriented vertically so that hot air is free to flow upwardly between the fins, so that free convection is not impeded by the fins themselves. The base of the lamp 40 is connected to a socket mounted in a cavity formed in the heat sink 52. An end cap 58 is provided covering the end of the heat sink 52 and serves as an optical baffle. The cavity between the heat sink 52 and the end cap 58 provides a space through which hot air can escape from around the lamp 40. The cavity acts as a chimney to cool the lamp socket when the lamp housing is facing down. The heat sink 52, lamp 40 and reflector 42 may be located at one end of the lamp housing 48. The light beam is directed through an exit opening at the other end of the lamp housing 48.

Most of the heat generated by the lamp 40 passes through the cold mirror coating of the reflector 42 and is dissipated by radiation and convection through the reflector glass substrate and heat sink 52. The visible and cooled portion of the beam is projected out of the housing 48 to illuminate the performer or stage. Since reflector 42 and heat sink 52 remove most of the heat, optical elements and other system components located in the beam path are protected from excessive thermal stress.

FIG. 16 shows the lamp housing 48 with the covers 156 and 158 removed to expose the filter actuation mechanism. The filter actuation mechanism is mounted on a finned heat sink 125 and driven by a motor 122 mounted on a non-metallic molded motor mount 124. The motor mount 124 is preferably made from a material with low thermal conductivity. In the preferred embodiment R
yton is used. The motor mount 124 is mounted on a metal plate 144 that is suspended from the tubular bulkhead 10 at a slight distance. The metal plate 144 acts as a shield against thermal radiation emanating from the bulkhead 10. The motor is thus protected against damage due to excess heat that accumulates in the motor housing.
(1) Metal plate heat shield 144 that blocks heat radiation and convection from the bulkhead 10, (2) thermal isolation motor mount 124 that resists heat transfer, and (3) generated by current flowing through the motor windings. It is protected by a finned heat sink 125 which dissipates heat.

Referring again to FIG. 15, the glass color filter 20 includes a metal center filter carrier 102 and a metal outer filter carrier 1 in the bulkhead 10.
Recall that it is supported by 00 and plastic bushing 70. The metal center filter carrier 102 is supported by a hub assembly 139 located generally along the longitudinal axis of the lamp housing and in the direct path of the light beam. The metallic center filter carrier 102 is made of a material that resists thermal deformation. Metal outer filter carrier 100
Are supported by a carrier holder 132 fastened to the outer surface of the bulkhead 10. The carrier holder 132 includes fins 133 that dissipate the heat absorbed from the bulkhead 10.

The heat-resistant glass lens 54 is arranged across the outer opening of the lamp housing 48 and is supported by the front ring 148. A plurality of ventilation holes 150 formed in the front ring allow air to pass through the ring. Ventilation holes formed in the front of the bulkhead 10 allow air to pass through the bulkhead 10. Light baffles 156 and 158 mounted on the tubular bulkhead prevent stray rays from the beam. A heat deflector 155 prevents heat radiation and convection from the heat sink 52 to the motor.
A metal cover fits around the bulkhead 10 while enclosing the motor and filter actuation mechanism to form an air chamber surrounding the tubular bulkhead. Ventilation holes 160 formed in the cover allow air to pass through the cover. A ridge 162 is formed in the cover 158 to accommodate the motor mounted in the thermally isolated motor mount 124. Ventilation holes 163 formed in the ridge 162 allow air to pass through the ridge. The metal plate 144, on which the motor mount is supported, forms an air chamber below the ridge, which air chamber
It is separate from the air chamber that surrounds the tubular bulkhead 10. Hot air surrounding the bulkhead is prevented from mixing with air surrounding the filter actuation motor 122. The lamp housing 48 is cooled by convection as hot air escapes from some ventilation holes while relatively cool air is drawn through the other ventilation holes.

The lamp housing 48 is suspended within a motorized yoke assembly 165 which is supported by a thermally insulated plastic rotating shaft 164. The yoke assembly 165 incorporates motorized mechanisms 166 and 168 (see FIGS. 18 and 19) that remotely adjust the position of the lamp housing with respect to orientation and height. The control electronics 170 responsive to the control signal input is also
It can be built into the yoke assembly. The electronic device includes a motor drive circuit for actuating the position adjustment mechanism and the filter actuation mechanism. Metal plate 17 interposed between the lamp housing and the yoke assembly
1, 172 and 173 are yoke cross members 174.
And attached to each of the two yoke legs 175, 176 and serves as a heat shield to protect the yoke assembly from hot air and heat radiation emanating from the lamp housing 48. Positioning motors and electronic control circuits can cause metal plates 171, 172 and 17 to fail due to excessive heat buildup in the yoke assembly.
Protected by the action of 3.

The various thermal management features described herein are designed to work in any orientation of the lamp housing. After all, the main feature of the luminaire is to pan the lamp housing in various directions.
And its ability to tilt.

Although some embodiments of the present invention have been shown in the accompanying drawings and described in the detailed description, the present invention is not limited to the disclosed embodiments but does not depart from the spirit of the invention. It will be appreciated that numerous rearrangements, variations, and replacements of parts and elements are possible.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing a subassembly of a rotatable filter according to the present invention.

FIG. 2 is a schematic perspective view of three adjacent rotatable filter subassemblies or modules showing different filter orientations.

FIG. 3 is a schematic end view of the embodiment of FIG.

4 is a schematic perspective view of a lighting device according to an embodiment of the present invention including the three modules of FIG. 2 enclosed in a tubular housing.

FIG. 5 is a cross-sectional view of a tubular frame showing a preferred center support according to the present invention.

FIG. 6 is a radial cross-sectional view of a tubular frame according to another embodiment of the invention, showing one module of six rotatable filters used in stage lighting.

7 is a sectional view in the axial direction of the embodiment of FIG.

FIG. 8 is a plan view of one rotatable filter used in the embodiment of FIG.

FIG. 9 is a perspective view of another embodiment of a luminaire showing a set of multiple filters.

FIG. 10 is an enlarged perspective view showing a connection mechanism for a color filter according to the present invention.

FIG. 11 is an enlarged perspective view showing a drive mechanism according to the present invention.

FIG. 12 is an enlarged perspective view showing a mounted state of the carrier of the rotatable filter on the shaft hub.

FIG. 13 shows a filter carrier, (A) to (D) are plan, front and side views, respectively.

FIG. 14 is a perspective view of a lighting device according to an embodiment of the present invention.

FIG. 15 is a cross-sectional view of the inside of a lighting fixture according to an embodiment of the present invention.

FIG. 16 is a perspective view of the lamp housing with a cover removed.

FIG. 17 is a rear view of the luminaire viewed from the rear of the lamp housing.

FIG. 18 is a right side view of the luminaire, including a cutaway view of the yoke assembly.

FIG. 19 is a left side view of the luminaire, including a cutaway view of the yoke assembly.

[Explanation of symbols]

2, 4, 6 Rotatable filter module, sub-assembly 10 Cylindrical frame, bulkhead 12 Main axis 14 Inlet opening 16 Outlet opening 18 Axis 20 (dichroic) filter 22 Gear wheel 24 Ring wheel 26 Step motor, drive motor 28 Shaft 30 worm gear 32 worm wheel 34 drive shaft, filter carrier shaft 40 lamp 42 reflector 48 outer housing, lamp housing 50 bulkhead 52 bulkhead, heat sink 54 glass lens 57 fins 58 end cap 60 center support member 62 radial arm 64 screw Fixture 66 U-shaped clip 68 Bushing 70 Bearing (bushing) 72 U-shaped channel 76 Hollow shaft 78 Bearing 100 Large filter key Rear 102 Small filter carrier 104 Spring wire 106 Slot 108 Ring 110 Roller 112 Tab 114 Axle pin 116 Coupling block 117 Mount post 121 Shaft 122 Step motor 123 Flexible bracket 124 Motor mount 125 Heat sink 127 Tab 128 Slot 130 Guide post 132 Carrier mount bracket , Carrier holder 133 Fin 134 Support rod 138 Finger spring 139 Hub 140,142 Stopper 144 Metal plate (heat shield) 148 Front ring 150 Ventilation hole 155 Heat deflector 156,158 Cover (optical baffle) 160 Ventilation hole 162 Raised 164 Rotation axis 165 Yoke assembly 166, 168 Motorized mechanism 170 Control electronic device 171, 172, 173 Metal plate 174 Yoke cross member 175, 176 Yoke leg

Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI Technical indication location G02B 5/22 7348-2K H04Q 9/00 301 B 7170-5K H05B 37/02 C 8715-3K (72) Invention Person Timothy. Stacy USA 75075 Plano Robin Road, Texas 3304

Claims (15)

[Claims] 1. A housing having a light source for generating light having a visible portion and an infrared portion, an inner frame and first and second ends, the housing enclosing the light source near the first end. A reflector disposed near the light source for reflecting a portion of the light to form a beam projected toward the second end, the reflector reflecting the visible portion of the light and the infrared portion. A reflector including a cold mirror capable of transmitting light; a heat sink disposed near the reflector for dissipating heat from the infrared portion of the light passing through the reflector; and mounted on the frame in the path of the beam. And a variable color filter mechanism for changing the color of the beam, and at least one motor for driving the color filter mechanism. 2. The luminaire according to claim 1, wherein the heat sink includes heat transfer fins arranged outside the frame. 3. The luminaire according to claim 1, wherein the heat sink is made of metal. 4. A thermal isolation motor mount having low thermal conductivity for mounting the motor on the frame, a heat shield plate for supporting the motor mount, and a heat sink with fins connected to the motor. The luminaire according to claim 1, wherein: 5. The luminaire of claim 1, wherein the housing includes ventilation holes that increase air flow through the housing. 6. The luminaire of claim 1, wherein the frame includes ventilation holes that increase air flow through the frame. 7. The lighting apparatus according to claim 1, further comprising a yoke attached to the housing, the yoke having a motor for panning and tilting the housing. 8. The luminaire according to claim 7, further comprising means for thermally shielding the yoke from the housing. 9. The luminaire of claim 7, further comprising an electronic device that receives a remote control input and that controls the motor in the yoke and housing. 10. The luminaire of claim 1, further comprising a plurality of light baffles mounted on the frame that block stray light rays from the beam. 11. The device according to claim 1, further comprising means for mounting the motor on the outside of the frame and thermally isolating the motor from the frame.
The luminaire described in. 12. A housing for enclosing a light source in a free air flow environment, and a reflecting means for reflecting light from the light source to form a light beam, the means for passing heat rays from the light source. Means for selectively altering the beam, including reflector means, means for dissipating heat from the reflector and the light source, and movable color filter means arranged in the path of the beam for changing the color of the beam. A motor means for driving the color filter means, a means for dissipating heat generated by the motor means, and an air flow environment surrounding the motor means from an air flow environment surrounding the color filter means. A motorized luminaire, comprising: means for isolating. 13. The luminaire of claim 12, further comprising ventilation means for increasing free air flow through the housing. 14. The luminaire according to claim 12, further comprising a yoke means for suspending the housing, wherein the yoke means further comprises means for rotating the housing in pan and tilt directions. 15. The luminaire of claim 14, further comprising means for isolating an air flow environment surrounding the housing from an air flow environment surrounding the yoke means.