Patent US 6964501 B2.
I wonder if this has actually been implemented? Although there have always been issues with LED overheating, this is something pretty inefficient. Peltier cell efficiency is lower than that of compressor-based refrigerators. They have no mechanical parts (= quiet) and their lifetime is almost unlimited though.
Does anybody know if it was ever used in an extreme(?) application where the lamp efficiency is not so crucial? Automotive?

Note: It could also be quite easy to make a Peltier-cooled lamp at home as the cells are quite cheap.

this is an totally waste of energy: peltier have something about 10% of efficiency, so thermal dissipation will be worse.
Spending 30W to get an 3W led be something 5% more efficient isn't an good idea (except where cooling is an must, as laser module).

However, automotive example is not working, because fuel cost a lot.

I doubt it makes any sense when the efficacy is the main concern. However when the LED's are needed for some other reason (spectrum,...), it may allow to operate them at higher power even in high temperature environment.
Or it's use could be, when the temperature is normally low most of the time (when the efficacy matters) and the high temperature exposure is there for just quite short time (so when the efficacy does not matter that much, but what would be a show stopper for the LED's without such heat pump). And it does not help when you are considering small heatsink: The Peltier adds quite significant thermal resistance, so needs large heatsink anyway, so it is really usable when really the high temperature comes from some other source than the LED.

I doubt it would be of any use in automotive, there the temperature profiles are well within the reach of the LED's even without such heat pump.

And in automotive, for the fuel economy way more important than the lamp efficacy is the weight of the system - the extra mass of the LED headlight system (that means not only the light itself, but as well the front lens defrosting) means higher fuel consumption than powering the less efficient halogens (utilizing the waste heat radiation for the defrosting, so no extra equipment needed for that) at about 30% of the driving time (normal headlight used only at low visibility)...
And the all time running DRL's do not need as accurate beam control, so do not have to run at so high power densities and mainly do not need the lens defrosting. But the low power density means they can well operate even at high ambient temperatures without any such apparatus (not speaking the halogen would be way lighter anyway).

OK, I understand...

Recently, another member posted a BMW LED Motorbike Headlight Unit picture that is a full LED headlamp + DRL. The information on the stand doesn't indicate how it's actually cooled though. The requested luminous flux for a big/fast motorbike could be quite high, but there might be a fan as well. (They can't rely on the air flow caused by motorbike moving at some speed. Peltier cell might be helpful here in case you're stuck in a traffic jam and there's almost none.)

Some of our local train (Regionova or City Elephant) locos have had LED headlights for a few years, but these are probably just DRLs whatever strong they are.

The lights are governed by quite tight standards, so all motorbikes have them practically equal regardless of the used technology, there is no room for any significant variations.

The thing is, even when the Peltier would be actively cooling just in the traffic jam, during normal move it's thermal resistance would be so high, you will need quite large heatsink anyway. On that BMW headlight is nothing beside of just a heatsink (maybe just automatic high beam switch OFF at stop and a bit of intensity reduction)

The trains headlights are indeed a form of DLR, there the reason is the (expected) lifetime. The main illumination beam light is in the center above the windshield and most likely it is just a halogen incandescent (rather frequent switching)...

And regarding the patent: If there is patent of anything, it does not mean at all it should be of any practical use, or if it really helps at all. It just block that idea for anyone else (only what is written in the "claims" section matters; and it could be really very loosely related to the patent title)...