Headup display device and method for indicating virtual image
First Claim
1. A headup display device configured to control a brightness of an image according to a present illumination in an environment of a vehicle and project the image to a front windshield of the vehicle to indicate the image as a virtual image in an interior of the vehicle, the headup display device comprising:
- an illumination determination unit configured to;
determine the present illumination by multiplying an increasing rate by an interior illumination, which is an illumination in the interior of the vehicle, in a light-adapted state, in which an interior of the vehicle is lighter than an exterior of the vehicle; and
determine the present illumination by multiplying a decreasing rate by an exterior illumination, which is an illumination in the exterior of the vehicle, in a dark-adapted state, in which an interior of the vehicle is darker than the exterior of the vehicle; and
a brightness control unit configured to control the brightness at a brightness corresponding to the present illumination determined by the illumination determination unit.
1 Assignment
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Accused Products
Abstract
A headup display device controls a brightness of an image according to a present illumination in an environment of a vehicle and projects the image to a front windshield of the vehicle to indicate the image as a virtual image in an interior of the vehicle. An illumination determination unit determines a present illumination by multiplying an increasing rate by an interior illumination in the interior of the vehicle when being in a light-adapted state, in which the interior of the vehicle is lighter than the exterior of the vehicle. The illumination determination unit determines the present illumination by multiplying a decreasing rate by an exterior illumination in the exterior of the vehicle when being in a dark-adapted state, in which the interior of the vehicle is darker than the exterior of the vehicle. A brightness control unit controls the brightness to correspond to the determined present illumination.
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Citations
8 Claims
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1. A headup display device configured to control a brightness of an image according to a present illumination in an environment of a vehicle and project the image to a front windshield of the vehicle to indicate the image as a virtual image in an interior of the vehicle, the headup display device comprising:
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an illumination determination unit configured to; determine the present illumination by multiplying an increasing rate by an interior illumination, which is an illumination in the interior of the vehicle, in a light-adapted state, in which an interior of the vehicle is lighter than an exterior of the vehicle; and determine the present illumination by multiplying a decreasing rate by an exterior illumination, which is an illumination in the exterior of the vehicle, in a dark-adapted state, in which an interior of the vehicle is darker than the exterior of the vehicle; and a brightness control unit configured to control the brightness at a brightness corresponding to the present illumination determined by the illumination determination unit. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for indicating a virtual image in an interior of a vehicle according to a present illumination in an environment of the vehicle, the method comprising:
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determining the present illumination by multiplying an increasing rate by an interior illumination, which is an illumination in the interior of the vehicle, in a light-adapted state, in which an interior of the vehicle is lighter than an exterior of the vehicle; determining the present illumination by multiplying a decreasing rate by an exterior illumination, which is an illumination in the exterior of the vehicle, in a dark-adapted state, in which an interior of the vehicle is darker than an exterior of the vehicle; controlling a brightness of an image corresponding to the determined present illumination; and projecting the image to a front windshield of the vehicle to indicate the image as the virtual image in the interior of the vehicle.
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Specification