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 interior illuminance sensor detecting an interior illumination, wherein the interior illumination is an illumination of a first detection area within the vehicle;
an exterior illuminance sensor detecting an exterior illumination, wherein the exterior illumination is an illumination of a second detection area external of the vehicle;
an illumination determination unit configured to;
determine an illumination state based on the interior illumination detected by the interior illuminance sensor and the exterior illumination detected by the exterior illuminance sensor, wherein the illumination state is in a light-adapted state when the interior illumination is greater than the exterior illumination and the illumination state is in a dark-adapted state when the exterior illumination is greater than or equal to the interior illumination,determine the present illumination of the vehicle by multiplying an increasing rate by the interior illumination, in the light-adapted state,determine the present illumination of the vehicle by multiplying a decreasing rate by the exterior illumination, in the dark-adapted state; 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.
6 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 interior illuminance sensor detecting an interior illumination, wherein the interior illumination is an illumination of a first detection area within the vehicle; an exterior illuminance sensor detecting an exterior illumination, wherein the exterior illumination is an illumination of a second detection area external of the vehicle; an illumination determination unit configured to; determine an illumination state based on the interior illumination detected by the interior illuminance sensor and the exterior illumination detected by the exterior illuminance sensor, wherein the illumination state is in a light-adapted state when the interior illumination is greater than the exterior illumination and the illumination state is in a dark-adapted state when the exterior illumination is greater than or equal to the interior illumination, determine the present illumination of the vehicle by multiplying an increasing rate by the interior illumination, in the light-adapted state, determine the present illumination of the vehicle by multiplying a decreasing rate by the exterior illumination, in the dark-adapted state; 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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detecting an interior illumination, wherein the interior illumination is an illumination of a first detection area within the vehicle; detecting an exterior illumination, wherein the exterior illumination is an illumination of a second detection area external of the vehicle; determining an illumination state based on the interior illumination and the exterior illumination, wherein the illumination state is in a light-adapted state when the interior illumination is greater than the exterior illumination and the illumination state is in a dark-adapted state when the exterior illumination is greater than or equal to the interior illumination; determining the present illumination of the vehicle by multiplying an increasing rate by the interior illumination, in the light-adapted state; determining the present illumination of the vehicle by multiplying a decreasing rate by the exterior illumination, in the dark-adapted state; 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