Patent ID: 11961430
Assignee: YAZAKI CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  B | IPC G

Claim 0:
1. A display device for a vehicle, the display device comprising:
an image display unit that projects a display image on a projected member of a vehicle, and causes a driver of the vehicle to visually recognize a virtual image corresponding to the display image projected on the projected member;
an imaging unit that acquires a face image including a face of the driver;
a pupil detection unit that detects a pupil of the driver based on the face image acquired by the imaging unit;
a moving speed calculation unit that calculates a moving speed of the pupil based on a position of the pupil detected by the pupil detection unit;
a pupil diameter calculation unit that calculates a pupil diameter of the pupil based on the pupil detected by the pupil detection unit; and
an adjustment unit that adjusts brightness of the virtual image based on at least the pupil diameter, wherein
the pupil diameter calculation unit
outputs the pupil diameter to the adjustment unit based on a comparison result between the moving speed calculated by the moving speed calculation unit and a threshold,
calculates the pupil diameter at a present time based on the pupil at the present time detected by the pupil detection unit in a case in which the moving speed is equal to or lower than the threshold, and outputs the calculated pupil diameter at the present time to the adjustment units, and
outputs the pupil diameter calculated at a previous time to the adjustment unit as the pupil diameter at the present time in a case in which the moving speed exceeds the threshold.