Having a simple, less furniture, effective and ergonomics tools are the very favorable aspects to have in a modern room design recently, especially for modern bedroom design. Moreover, one of the important part that might define the whole look of a bedroom design is the door design.
Furthermore, if you want to have an industrial design for your bedroom, then you need to prepare the whole aspects like unfinished look for some points in your room and specifically you can choose sliding door. This kind of door is perfect to be installed to a your bedroom which is not too spacy. Moreover, this door design is easy to access and also ergodinamics.
Another option to have a synchronized door design with its room design is about the material used. You can choose a full wooden door with full iron frame. Moreover, paint it with brown woody color or without painted it would be nice, so it is really woody exposed door design or rustic look.
Briefly, industrial design is just one of some bedroom designs which the door design is the important part of others. So, if you want to try apply a theme to your bedroom, those pics above could be your inspiration. But, one addition tips, make sure to have one or two colors to creat a simple, neat and clean nuance because those aspects are more specific to indicate a modern design of a room, like bedroom.