A microprocessor controlled optical keyboard emulator

摘要: An optical keyboard emulator (OKE) which allows individuals with severe motor dysfunction to access personal computer systems by small head movements is discussed. The OKE incorporates a focused headpointer can detect one light-emitting diode (LED) on driven LED array providing the high information bandwidth of direct selection technique. spacing array, reference light pointer, and key memory system provide improvements over commercially available allowing without accurate control utilize this device. microprocessor-based, yielding versatility in layout compatibility between while being completely transparent computer. >