Automotive headlamp apparatus and method of controlling automotive headlamp apparatus where high beam illumination area is controlled
An automotive headlamp apparatus is provided with a light source for producing a high beam and a controller for controlling illumination from the light source. Given that at least a portion of a high beam illumination area illuminated by the light source is vertically divided into a plurality of blocks, the controller controls illumination from the light source such that a plurality of first regions having a predetermined horizontal width are formed at least in some of the blocks toward the bottom, and that a second region having a greater horizontal width than the first regions is formed in the block toward the top.
1. An automotive headlamp apparatus comprising:
a light source for producing a high beam; and
a controller for controlling the illumination from the light source, wherein
given that at least a portion of a high beam illumination area illuminated by the light source is vertically divided into a plurality of blocks, the controller controls illumination from the light source such that a plurality of first regions having a predetermined horizontal width are formed at least in some of the blocks toward the bottom, and that a second region having a greater horizontal width than the first regions is formed in the block toward the top, and
wherein the controller is operative to control illumination from the light source such that when an object that requires reduced illumination is found in the high beam illumination area, the portion of the high beam illumination area corresponding to the location occupied by the object is turned off.
2. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the first and second regions are formed so as to include the vicinity of the center of the high beam illumination area illuminated by the light source.
3. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the high beam illumination area corresponds to an overhead sign region.
4. The automotive headlamp apparatus according to claim 1 , wherein
the controller turns on the second region while a low beam is being turned on so as to add to the low beam.
5. The automotive headlamp apparatus according to claim 3 , wherein
the controller turns on the second region while a low beam is being turned on so as to add to the low beam.
6. The automotive headlamp apparatus according to claim 1 , wherein
the controller turns on the vicinity of the center of the first regions while a low beam is being turned on so as to add to the low beam.
7. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the size of the first regions is increased in steps from the center toward the sides.
8. The automotive headlamp apparatus according to claim 1 , wherein
the light source comprises a plurality of individual light sources adapted to form the first and second regions individually, and
the controller produces the high beam illumination area by individually controlling the individual light sources.
9. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls, when a vehicle is turning, illumination from the light source such that the first and second regions are formed in the direction of turning.
10. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the first and
second regions are formed in accordance with the forward or backward inclination of a vehicle.
11. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the first and second regions are formed in accordance with information obtained from a navigation system or a camera.
12. The automotive headlamp apparatus according to claim 1 , wherein
the controller controls illumination from the light source such that the end portions of the high beam illumination area are integrated with the second region.
13. The automotive headlamp apparatus according to claim 1 , wherein
the controller forms the first and second regions by using a liquid crystal filter to variably shield light from the light source.
14. A method of controlling an automotive headlamp apparatus for controlling illumination from a light source for producing a high beam, comprising:
vertically dividing at least a portion of a high beam illumination area illuminated by the light source into a plurality of blocks;
controlling illumination from the light source such that a plurality of first regions having a predetermined horizontal width are formed at least in some of the blocks toward the bottom, and that a second region having a greater horizontal width than the first regions is formed in the block toward the top; and
when an object that requires reduced illumination is found in the high beam illumination area, the portion of the high beam illumination area corresponding to the location occupied by the object is turned off.
15. The method according to claim 14 , wherein
an image indicating the presence of the object is displayed superimposed in the direction, as viewed from the driver, to be illuminated by the region turned off.
16. The method according to claim 15 , wherein
when the image is displayed superimposed, an audio announcement is made to let know that the object that requires reduced illumination is found.