Line of sight detection apparatus and an equipment having the li

Details Line of sight detection apparatus and an equipment having the li Line of sight detection apparatus and an equipment having the li

1995-12-27

1998-01-06

Dang, Hung X.

Optics: eye examining, vision testing and correcting

Eye examining or testing instrument

Objective type

354402, A61B 314

Patent

active

057060711

ABSTRACT:
A device for detecting a line of sight includes an image pick-up element for picking up an eyeball image of a user, a line of sight detection circuit for detecting the line of sight of the user by calculating an output from the image pick-up element, a maximum value detection circuit for detecting a maximum output value output from the image pick-up element, a comparison circuit for comparing the maximum value with a predetermined threshold value, and an inhibition circuit for inhibiting a line of sight detection operation of the line of sight detection circuit when the maximum value is smaller than the threshold value.

REFERENCES:
patent: 5296888 (1994-03-01), Yamada
patent: 5486892 (1996-01-01), Suzuki et al.

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