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Canon Patent Application: High powered speedlite with cooling | Canon News
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Canon Patent Application: High powered speedlite with cooling
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Canon Patent Application: High powered speedlite with cooling

In this patent application, Canon details a speedlite with built in forced air cooling to keep the flash head cool.

The mechanical design of the speedlite is quite developed in the patent application leading me to believe that the development is quite far along for this flash.  This speedlite is also a hybrid speedlite that contains a LED portion for continuous lighting (or perhaps as a modelling light).  

In Canon patentspeak;

An object of the present invention is to provide a lighting device capable of protecting a member related to light emission from heat associated with light emission.  A light source, a first optical member that transmits light emitted from the light source, and a light source that transmits light emitted from the light source are disposed between the light source and the first optical member. The second optical member and the air sucked from the first space, which is the inner space including the light source, on the light source side of the second optical member, and the first optical member and the second optical member. An air blowing mechanism that sends the air to a second space that is a space between the optical members.

Canon also mentions the flash head having LED's.  In the images below, 401 and 402 are LED's where the flash discharge tube is 102.  You can see from the air flow path that both the discharge tube and the LED's have air circulation around them.

The fan unit would be underside the flash head, protected mostly against the elements.

Japan Patent Application 2019-185021

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