RV Blinds - What are these?

There is a type of blind I've seen, generally on older or more upscale coaches, that are basically the soft fabric honeycomb. But the feature I'm asking about is where the darker (or blackout) is at the top and the light filtering or "sheer" so to speak is the bottom part. These, in effect, do both functions: blackout and privacy, but allow in light while in privacy mode. They are a top down/bottom up. Does anybody know what these are correctly called so I may do an Internet search? Thanks.