Thermal conductivity and phase transition heat transfer mechanism including optical element to be cooled by heat transfer of the mechanism

Patent metadata

Field	Value
Publication number	US-9459000-B2
Application number	US-201414249736-A
Country	US
Kind code	B2
Filing date	Apr 10, 2014
Priority date	Aug 30, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

A thermal conductivity and phase transition heat transfer mechanism incorporates an active optical element. Examples of active optical elements include various phosphor materials for emitting light, various electrically driven light emitters and various devices that generate electrical current or an electrical signal in response to light. The thermal conductivity and phase transition between evaporation and condensation, of the thermal conductivity and phase transition heat transfer mechanism, cools the active optical element during operation. At least a portion of the active optical element is exposed to a working fluid within a vapor tight chamber of the heat transfer mechanism. The heat transfer mechanism includes a member that is at least partially optically transmissive to allow passage of light to or from the active optical element and to seal the chamber of the heat transfer mechanism with respect to vapor contained within the chamber.

First claim

What is claimed:

1. A thermal conductivity and phase transition heat transfer mechanism comprising:
an integral active optical element to be cooled by phase transition of the mechanism, at least a portion of the active optical element being exposed to a working fluid within a vapor tight chamber of the heat transfer mechanism, the active optical element comprising a phosphor;
a member that is at least partially optically transmissive serving both to seal the working fluid within the chamber and to allow passage of light to or from the active optical element; and
a wicking structure within the chamber, wherein the phosphor is formed in at least a portion of the wicking structure.

2. The mechanism of claim 1 , wherein the phosphor is an opto-luminescent type of phosphor.

3. The mechanism of claim 1 , wherein the phosphor is electroluminescent type of phosphor.

4. A thermal conductivity and phase transition heat transfer mechanism comprising:
an integral active optical element to be cooled by phase transition of the mechanism, at least a portion of the active optical element being exposed to a working fluid within a vapor tight chamber of the heat transfer mechanism; and
a member that is at least partially optically transmissive serving both to seal the working fluid within the chamber and to allow passage of light to or from the active optical element, wherein:
the active optical element comprises an opto-electrical transducer; and
the working fluid is electrically conductive for carrying electrical current to or from a portion of the opto-electrical transducer during operation of the opto-electrical transducer.

5. The mechanism of claim 4 ,
wherein:
pressure throughout the chamber configures the working fluid to perform a phase transition cycle that moves the fluid and changes states of the fluid so as to absorb heat during operation of the active optical element, to vaporize at a relatively hot location of the mechanism as it absorbs heat, to transfer heat to and condense at a relatively cold location of the mechanism, and to return as a liquid to the relatively hot location of the mechanism; and
the phase transition cycle is performed without power or any mechanical part.

6. The mechanism of claim 4 , wherein the opto-electrical transducer is a light emitter.

7. The mechanism of claim 6 , wherein the light emitter is a type of emitter selected from the group consisting of: a light emitting diode (LED), an organic light emitting diode (OLED), a laser diode, a nanowire light emitter, and an electroluminescent device.

8. The mechanism of claim 4 , wherein the opto-electrical transducer is a light-to electricity converter.

9. The mechanism of claim 8 , wherein the light-to electricity converter is a sensor or a photovoltaic device.

10. The mechanism of claim 4 , further comprising a wicking structure mounted within the chamber to facilitate flow of condensed liquid of the working fluid from the cold location of the mechanism to the hot location of the mechanism.

11. The mechanism of claim 10 , wherein the wicking structure comprises grooves, sintered powder, mesh, wires or nanowires on an inner surface of the chamber.

12. The mechanism of claim 10 , wherein the wicking structure is at least substantially reflective.

Assignees

• Abl Ip Holding Llc

Inventors

• Ramer David P
• Rains Jr Jack C

Classifications

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• H10H20/8586

  comprising fluids, e.g. heat-pipes · CPC title

• H10F77/68

  using gaseous or liquid coolants, e.g. air flow ventilation or water circulation · CPC title

• H10F77/63

  Arrangements for cooling directly associated or integrated with photovoltaic cells, e.g. heat sinks directly associated with the photovoltaic cells or integrated Peltier elements for active cooling · CPC title