Sight line detection device

Abstract

The invention provides a sight line detection device. A light transmitting part before a light source and a camera is thin, and the strength can be guaranteed. An illuminating camera part (20) comprises a camera (21) and a light source (22). A front part (30), which is covered on the illuminating camera part (20), is formed by tightly connected a light transmitting part (31) and a light shielding part (35) through a bicolor moulding technology. So the strength can be guaranteed, even the thickness (t) of the covered part (32) in the front of light transmitting part (31) is less than 2 mm in front of the camera hole (23). By configuring a thin front covered part (32), the light emitted by the light source (22) will only propagate in the front covered part (32), and will not be emitted to the camera (21); and thus the phenomenon that the light is directly provided to the camera (21) is prevented.

Description

technical field [0001] The present invention relates to a line-of-sight detection device capable of detecting the line-of-sight direction of a target person other than a driver of a vehicle. Background technique [0002] In the gaze point detection method described in Patent Document 1, two cameras are directed toward the eyes of the subject. Two types of light sources are arranged concentrically around each camera. A light source emitting light with a center wavelength of 850 nm is arranged along the inner circle near the camera, and a light source emitting light with a center wavelength of 950 nm is arranged along the outer circle. light source. By irradiating light of 850 nm, images of bright pupils can be acquired by the camera, and images of dark pupils can be acquired by irradiating light of 950 nm. [0003] In this fixation point detection method, a pupil image is obtained based on a difference image between a bright pupil image and a dark pupil image, and a corneal...

AI Technical Summary

Problems solved by technology

When covering the front of the camera and the light source that are placed close to each other with the same cover, there is a problem that the light emitted from the light source propagates inside the cover, and part of the light is emitted from the cover and is easily detected by the camera.

[0008] However, a cover with a thickness of 2 mm or less has very low strength, and it is difficult to cover the front of both cameras and light sources, and it is difficult to form a wide-area cover that can cover all of the two cameras and the light sources placed close to each camera.

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