The idea of the "About Us" is to demonstrate that you are a serious company that's here to bring value to your customers and that you have the experience to do so. If you say in your About Us: "We are beginners, no experience, we have launched a couple of weeks ago on a idea and I trying to make some money" of course you could put you picture up there I don't believe it's going to help.
Now, if you put your background experience, showing how relevant it is to your business, no specifics about when you started unless you have actually spend several years on it, showing what VC or investors (with relevant experience), etc.. you get the idea. Then your name and picture is just to bring a little more human touch to your description. People like to see you they are dealing with.
If you are private, put your first name and first letter of last name or something like that. It should be enough. But remember, the About Us is a marketing tool, not just for show.