Adjustable support device for display

A support device comprising:

• a housing including a chamber formed therein;
• a transmission device attached to said housing, said transmission device including a carrier slidably attached to said housing and moveable up and down relative to said housing, and said transmission device including a driving device connected to said carrier for driving and moving said carrier up and down relative to said housing;
• an object attached to said carrier and supported on said carrier;
• a sensor element attached to said object for detecting an approaching of a user toward said object;
• a sensor member disposed close to said housing for detecting the approaching of the user toward said object, said sensor member being selected from a sensor mat supported on a ground and disposed and located close to said housing;
• and
• a control device connected to said sensor element and to said sensor member for receiving signals from said sensor element and said sensor member, and said control device being connected to said driving device for driving and moving said carrier up and down relative to said housing and for moving said object to a selected position relative to the user.