I see your point. Patent does not specifically mention blue electrochromic film, which is the concept for eliminating the LED chips for microLED. However, it does have this bucket clause which I think would enable Apple to use blue electrochromic film instead of blue LED.

Quote:

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Having described several embodiments, it will be recognized by those skilled in the art that various modifications, alternative constructions, and equivalents may be used without departing from the spirit of the invention. Additionally, a number of well-known processes and elements have not been described in order to avoid unnecessarily obscuring the present invention. Accordingly, the above description should not be taken as limiting the scope of the invention.

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