Can my 4K TV be upgraded to support HDR?
High Dynamic Range (HDR) is only supported by a specific set of 4K Android TV™ models. For more information on what this feature is and which models are supported for use with this feature, view What is the High Dynamic Range (HDR) feature on the 4K Android TV?
NOTE: If you have a 4K TV model other than the ones listed in the link above, it is not possible to upgrade to or add HDR to the TV.