This invention relates to multiparameter lighting fixtures and gobo rotation systems and methods.
Multiparameter lighting fixtures are lighting fixtures, which illustratively have two or more individually remotely adjustable parameters such as focus, color, gobo images, position, or other light characteristics. Multiparameter lighting fixtures are widely used in the lighting industry because they facilitate significant reductions in overall lighting system size and permit dynamic changes to the final lighting effect. Applications and events in which multiparameter lighting fixtures are used to great advantage include showrooms, television lighting, stage lighting, architectural lighting, live concerts, and theme parks. Illustrative multi-parameter lighting fixtures are described in the product brochure entitled “The High End Systems Product Line 2001” and are available from High End Systems, Inc. of Austin, Tex.
Multiparameter lighting fixtures are commonly constructed with a lamp housing that may pan and tilt in relation to a base housing so that light projected from the lamp housing can be remotely positioned to project on the stage surface. Commonly a plurality of multiparameter lights are controlled by an operator from a central controller. The central controller is connected to communicate with the plurality of multiparameter lights via a communication system. U.S. Pat. No. 4,392,187 titled “Computer controlled lighting system having automatically variable position, color, intensity and beam divergence” to Bornhorst and incorporated herein by reference disclosed a plurality of multiparameter lights and a central controller. Digital communications between a central controller and a multi-parameter light fixture typically is by wire. In 1986, the United States Institute of Theatre Technology (“USITT”) developed a digital communications system protocol for multi-parameter light fixtures known as DMX512.
The lamp housing of the multiparameter light contains the optical components such as a gobo wheel a lens and a lamp. The lamp housing is rotatably mounted to a yoke that provides for a tilting action of the lamp housing in relation to the yoke. The lamp housing is tilted in relation to the yoke by a motor actuator system that provides remote control of the tilting action by the central controller. The yoke is rotatably connected to the base housing that provides for a panning action of the yoke in relation to the base housing. The yoke is panned in relation to the base housing by a motor actuator system that provides remote control of the panning action by the central controller.
Multiparameter lights often use gobos to project patterns upon a stage or other projection surface. A gobo is often comprised of a metal or metal on glass that has been etched into a stencil pattern that provides an image or likeness of the gobo to be projected. The gobo wheel of a prior art multiparameter light is often comprised of a planetary type system and the gobos of the gobo wheel (like the planets) rotate around a sun gear located in the center. Any gobo positioned on the gobo wheel of the multiparameter light may be remotely selected to be brought into position and then projected by the multiparameter light. The gobo wheel often is comprised of two motors. One motor (the gobo select motor) is required to remotely position a selected gobo into the light path for projection and the second motor is required to remotely rotate the selected gobo in a smooth and continuous manner.
The Cyberlight by High End Systems of Austin, Tex. as described in the product brochure entitled “The High End Systems Product Line 2001” incorporates such a gobo wheel to bring selected patterns into the light path for projection and then smoothly rotate the selected gobo in the light path. A further description of a gobo wheel is shown in my U.S. Pat. No. 5,402,326 tilted “Gobo Holder for a Lighting System” to Belliveau et al. In the prior art it has been critical for the rotation of the selected gobo to be substantially smooth as to not cause a distraction during a show to the audience when the multiparameter light is in use. Great care has been taken by multiparameter lighting manufacturers to rotate a selected gobo without any jitter or jerking during the rotations. Motors that often are used to rotate the selected gobo are stepping motors and manufacturers often employ microstepping techniques and circuitry to substantially smoothly rotate the selected gobo.
Through recent experimentation by the inventors it has been found that it can also be desirable to not only rotate the selected gobo in a substantially smooth way but additionally rotate the selected gobo as to cause an animation effect. The animation effect of the selected gobo provides a pleasing new way of rotating the selected gobo of a multiparameter light and thus increases the value of the light during show use to the operator or designer.
In one embodiment of the present invention, a multiparameter lighting apparatus is disclosed that allows an operator of a central controller to remotely choose a first rotation of a selected gobo of the multiparameter lighting apparatus. The first rotation is typically a substantially smooth rotation. A second rotation can also be chosen, wherein the second rotation causes an animation of the selected gobo.
In at least one embodiment of the present invention the multiparameter lighting apparatus is comprised of a base and a lamp housing. The lamp housing is remotely positionable in relation to the base housing by a motor. The lamp housing is comprised of a lamp, a rotating gobo system, and a projection lens. The lamp typically produces a light path. The multiparameter lighting apparatus may be further comprised of a communications port, a processing system, and a memory, such as a computer or electronic memory.
The rotating gobo system may be comprised of a plurality of rotatable gobos. A first one of the plurality of rotatable gobos can be selected to be in the light path for projection on a projection surface by the projection lens. A first command received by the communications port may cause the first rotatable gobo to rotate in a first state, in which the first rotatable gobo rotates in a substantially smooth manner about a three hundred sixty degree rotation. A second command received by the communications port may cause the first rotatable gobo to rotate in a second state, in which the first rotatable gobo rotates in an incremental manner about a three hundred sixty degree rotation.
A dwell time may be stored in the memory. The dwell time may be a component of each increment when the gobo rotates in the second state. The first command and the second command may be compliant with the DMX protocol.
In one embodiment of the present invention a multiparameter lighting apparatus may be provided which may include a rotatable gobo, a communications port, and a lamp which produces a light path. A first command received by the communications port may cause the rotatable gobo to rotate in a substantially smooth manner about a three hundred sixty degree rotation while in the light path. A second command received by the communications port may cause the rotatable gobo to rotate in an incremental manner about a three hundred sixty degree rotation.
The multiparameter lighting apparatus may include a memory and the increments that the rotatable gobo rotates may be comprised of a rate. The rate may be stored in the memory. The increments that the rotatable gobo rotates may be comprised of a dwell time and the dwell time may be stored in the memory. The incremental manner the gobo is rotated may cause animation effects when a gobo likeness is projected by the multiparameter lighting apparatus.
In one embodiment of the present invention, a method for operating a multiparameter lighting apparatus is provided, wherein the multiparameter lighting apparatus includes a base housing, a yoke, a lamp housing, a projection lens, and a plurality of rotatable gobos, and the lamp housing is remotely positionable in relation to the base housing by a motor. The method may include causing the multiparameter lighting apparatus to produce a light path, and selecting a first rotatable gobo of the plurality of rotatable gobos to be in the light path for projection on a projection surface by the projection lens. The method may further include receiving a first command at a communications port of the multiparameter lighting apparatus and in response to the first command, causing the first rotatable gobo to rotate in a first state. In the first state the first rotatable gobo rotates in a substantially smooth manner about a three hundred sixty degree rotation.
The method may also include receiving a second command at the communications port and in response to the second command causing the first rotatable gobo to rotate in a second state and wherein in the second state the first rotatable gobo rotates in an incremental manner about a three hundred sixty degree rotation.
In the description that follows, like parts are marked throughout the specification and drawings with the same reference numerals, respectively. The drawing figures are not necessarily to scale. Certain features of the invention may be shown exaggerated in scale or in somewhat schematic form and some details of conventional elements may not be shown in the interest of clarity and conciseness. The present invention is susceptible to embodiments of different forms. There are shown in the drawings, and herein will be described in detail, specific embodiments of the present invention with the understanding that the present disclosure is to be considered an exemplification of the principles of the invention, and is not intended to limit the invention to that illustrated and described herein. It is to be fully recognized that the different teachings of the embodiments discussed below may be employed separately or in any suitable combination to produce the desired results.
The base housing 110 is rotatably connected to the yoke 120 by a bearing 125, i.e. the yoke 120 rotates or swivels with respect to the base housing 110. The yoke 120 is driven to rotate in relation to the base housing 110 by a motor actuator (not shown for simplification). The lamp housing 130 is rotatably connected by bearings (not show for simplification) to the yoke 120. The lamp housing 130 is driven to rotate in relation to the yoke 120 by a tilt motor actuator (not shown for simplification).
The lamp housing 130 has an output projection lens 140 used to project images of the selected gobo. The base housing 110 has a communication connector 112 for connecting an external communications cable 158 to a central controller 150 so that an operator may remotely control parameters, including the gobo parameters, of the multiparameter light 102. The communications connector 112 may also provide an output for serial communication to other multiparameter lights (not shown for simplification). A connection lead 114 to a power source (not shown for simplification) is also shown in
The central controller 150 can be used by an operator to remotely select a gobo to be projected by the output projection lens 140. The operator of the central controller 150 may use a video screen 152 to visualize commands sent from the central controller 150 over the communications line or cable 158 to the multiparameter light 102. A keypad 156 may be used by the operator to select a first or second rotation type for the selected gobo of the multiparameter light 102. One of the control knobs 154a, 154b, 154c, or 154d may be used by an operator to select a rotation rate of a selected gobo.
The motor control 218 is shown connected to two motor control lines 230 and 231, which run from the base housing 110 to the lamp housing 130. Motor control line 231 is used to send motor control signals to a motor 334 that turns motor shaft 332 used to position a selected gobo into the light path 280 as represented by dashed lines 280a and 280b. Motor control line 230 is used to send motor control signals to motor 324 that turns motor shaft 322 that is used to rotate the selected gobo in the light path 280 as represented by dashed lines 28a and 280b.
Power lead 114 is used to connect a source of power to the multiparameter light 102 (source of power not shown for simplification). The power lead 114 provides power to the power supply 220 that provides power to the electronic components and power to drive the motors such as motors 324 and 334. The power lead 114 also provides power to the lamp supply 221 used to provide power to the lamp 266 (connection not shown for simplification).
A gobo wheel 300 (which is shown in more detail in
The gobo position marked at zero degrees for
The operator of the central controller 150 can send commands to the multiparameter light 102 that remotely vary which one of the gobos, such as one of gobos 310a, 312a, and 314a, on the gobo wheel 300 are placed into the light path 280 of