Appeal No. 1999-0864 Page 2
Application No. 08/757,550
In the conventional HMD, the periphery of a main display
image is covered with a black-colored field. As a result, a
user views an LCD screen floating in a black space.
Unfortunately, the difference of brightness between the main
display image and the periphery tires the user’s eyes.
The appellant’s HMD detects a change in the brightness or
color-tone of an image displayed on a screen of its LCDs; a
change in the volume or frequency of an accompanying sound; or
a change of the state surrounding a user who is viewing the
displayed image. According to the detected change, the HMD
varies the brightness or color-tone of the “environmental
image,” i.e., the periphery, surrounding the image on the LCD
screen. Reducing the difference in brightness between the
field-of-vision of the HMD and the external light around the
user reduces his eye fatigue. Varying the brightness or
color-tone, furthermore, enhances the user’s experience.
Claim 22, which is representative for our purposes,
follows:
Claim 22.
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