Light assembly for a projector
View Patent ↗In one aspect, a light assembly configured to be installed in a movie theatre projector includes an emitter housing with an LED emitter plate that emits a beam of light and a lens assembly. The light assembly also includes a cooling assembly configured to dissipate heat from the LED emitter plate. The a cooling assembly includes a cooling fluid jacket coupled to the LED emitter plate, where the cooling fluid jacket comprises a metal layer enclosing a hollow path for cooling fluid, and where the cooling fluid jacket is configured to allow the cooling fluid to pass through cooling fluid jacket, thereby drawing heat from the LED emitter plate. The light assembly also includes a heat sink and a cooling fan. The cooling assembly further includes cooling sections to cool the cooling fluid that flows out of the cooling fluid jacket.
1. A light assembly configured to be installed in a movie theatre projector, the light assembly comprising:
an adaptor configured to mechanically couple to a bulb mount of the movie theatre projector;
an emitter housing that comprises a Light Emitting Diode (LED) emitter plate;
at least one LED directly or indirectly attached to the LED emitter plate and configured to emit a beam of light;
a lens assembly configured to collimate light emitted from the at least one LED; and
a cooling assembly configured to dissipate heat from the LED emitter plate, wherein the cooling assembly comprises:
a first cooling fluid jacket coupled to the LED emitter plate, wherein the first cooling fluid jacket comprises a metal layer enclosing a hollow path for cooling fluid, and wherein the first cooling fluid jacket is configured to allow the cooling fluid to pass into the first cooling fluid jacket, along the path and out of the first cooling fluid jacket, thereby drawing heat from the LED emitter plate;
a first heat sink coupled to the first cooling fluid jacket; and
a first cooling fan configured to pass air over the first heat sink.
2. The light assembly of claim 1 , wherein the cooling assembly comprises:
one or more cooling fluid conduits; and
one or more cooling sections configured to receive, via the one or more cooling fluid conduits, the cooling fluid from the first cooling fluid jacket, cool the cooling fluid and return the cooling fluid to the first cooling fluid jacket.
3. The light assembly of claim 2 , wherein each of the one or more cooling sections comprises:
a second cooling fluid jacket configured to receive and return the cooling fluid;
one or more Peltier plates configured to transfer heat from the second cooling fluid jacket;
a second heat sink configured to dissipate heat from the one or more Peltier plates; and
one or more second cooling fans configured to pass air over the second heat sink.
4. The light assembly of claim 2 , wherein the one or more cooling fluid conduits pass in and out of the emitter housing.
5. The light assembly of claim 2 , wherein the cooling assembly comprises:
one or more temperature sensors coupled to or embedded within the first cooling fluid jacket, the LED emitter plate and/or the first heat sink; and
a cooling control system configured to, based on a comparison of temperature information from the one or more temperature sensors to a given temperature threshold, activate a pump to move the cooling fluid between the first cooling fluid jacket and the one or more cooling sections.
6. The light assembly of claim 2 , further comprising pre-cooling fans configured to cool the cooling fluid flowing in the one or more fluid conduits from the first cooling fluid jacket to the one or more cooling sections.
7. The light assembly of claim 1 , wherein the path comprises a spiral with multiple turns.
8. The light assembly of claim 1 , wherein the path comprises an Archimedean spiral, parabolic spiral, a logarithmic spiral or a Fermat spiral.