Patent ID: 7403337

Claim:
A focus adjustable head mounted display system used in a head mounted display device comprising: an image capturing device for capturing environment images; an image processing unit connected to the image capturing device for receiving image signals from the image capturing device and processing the received image signals; a focus adjustment unit included in the image processing unit for adjusting an input image from the image capturing device according an input focus adjustment signal to generate an adjusted display image so that the adjusted display image is in response to the focus adjustment signal; an image display unit connected to the image 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 image processing unit; the focus input unit providing a focus value to the focus adjustment unit.