We encounter hot air re‐circulation issue with thermal rear venting to convertible laptop with
stage hinge design. The hot air re‐circulation issue will result in thermal capacity reduction due
to hot air flow back. (as Pic. 1) No fresh cold air can get from the inlet. With those issues, heat
be generated from ICs (CPU/GPU…etc) can’t be removed successfully, this will also cause the
processor performance limitation which result in total system performance reduction.
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INC, HP, "A MECHANISM TO PREVENT HOT AIR RECIRCULATION TO CONVERTIBLE LAPTOP WITH STAGE HINGE DESIGN", Technical Disclosure Commons, (July 14, 2021)