Patent ID: 6947219

Claim:
A focus adjustable head mounted display system used in a head mounted display device for displaying digital contents comprising: a digital content storage unit for storing digital data including audio data and image data; a signal processing unit connected to the digital content storage unit for receiving image signals outputted from the digital content storage unit and processing the received image signals; a focus adjustment unit included in the signal processing unit for adjusting an input image from the digital content storage unit according an input focus adjustment signal to generate an adjusted display image so that the adjusted display image responses the focus adjustment signal; an image display unit connected to the signal processing unit; the image display unit being installed at a head mounted display device for displaying the adjusted display image which is directly viewed by at least one eye of a user wearing the head mounted display; and a focus input unit connected to the focus adjustment unit; focus input unit being a manually operation device for generating the focus adjustment signal to the signal processing unit; the focus input unit providing a focus value to the focus adjustment unit.