HEAD-UP DISPLAY
First Claim
1. A head-up display that projects display light to a projection member, the head-up display comprising:
- a beam generator that emits a beam of light as the display light;
a scanner including a moveable reflective surface, the scanner receiving the display light from the beam generator and scanning the display light;
an optical actuator that integrally rotates the beam generator and the scanner to change a scanner angle of incidence of the display light at the scanner;
a screen that receives the display light from the scanner and reflects the display light;
a concave mirror that receives the display light from the screen and reflects and expands the display light to the projection member;
a concave mirror actuator that changes, based on external instructions, a concave mirror angle of incidence of the display light at the concave mirror by rotating the concave mirror; and
a controller including a CPU and a memory, whereinthe display light travels between the beam generator, the scanner, the screen, the concave mirror, and the projection member substantially along a common plane, andthe controller is programmed to drive, based on the concave mirror angle of incidence, the optical actuator to change the scanner angle of incidence such that display light distortions generated at the concave mirror are offset by display light distortions generated at the scanner.
1 Assignment
0 Petitions
Accused Products
Abstract
A head-up display includes a concave mirror actuator that changes, based on external instructions, a reflection angle by which a concave mirror reflects display light. A drawing unit includes a beam generator, a scanner, an optical actuator, and a controller. The beam generator emits a beam, and the scanner scans the beam in two dimensions by moving a reflection surface to draw an image. The optical actuator changes an angle of incidence of when the beam is emitted to the scanner. The controller drives the optical actuator to change the angle of incidence such that display light distortions generated at the concave mirror are offset by display light distortions generated at the scanner.
13 Citations
7 Claims
-
1. A head-up display that projects display light to a projection member, the head-up display comprising:
-
a beam generator that emits a beam of light as the display light; a scanner including a moveable reflective surface, the scanner receiving the display light from the beam generator and scanning the display light; an optical actuator that integrally rotates the beam generator and the scanner to change a scanner angle of incidence of the display light at the scanner; a screen that receives the display light from the scanner and reflects the display light; a concave mirror that receives the display light from the screen and reflects and expands the display light to the projection member; a concave mirror actuator that changes, based on external instructions, a concave mirror angle of incidence of the display light at the concave mirror by rotating the concave mirror; and a controller including a CPU and a memory, wherein the display light travels between the beam generator, the scanner, the screen, the concave mirror, and the projection member substantially along a common plane, and the controller is programmed to drive, based on the concave mirror angle of incidence, the optical actuator to change the scanner angle of incidence such that display light distortions generated at the concave mirror are offset by display light distortions generated at the scanner. - View Dependent Claims (2)
-
-
3. A head-up display that projects display light to a projection member, the head-up display comprising:
-
a beam generator that emits a beam of light as the display light; a scanner including a moveable reflective surface, the scanner receiving the display light from the beam generator and scanning the display light; an optical actuator that integrally rotates the beam generator and the scanner to change a scanner angle of incidence of the display light at the scanner; a screen that receives the display light from the scanner and reflects the display light; a concave mirror that receives the display light from the screen and reflects and expands the display light to the projection member; a concave mirror actuator that changes, based on external instructions, a concave mirror angle of incidence of the display light at the concave mirror by rotating the concave mirror; and a controller including a CPU and a memory, wherein the display light travels between the beam generator, the scanner, the screen, the concave mirror, and the projection member substantially along a common plane, the controller is programed to drive, when the concave mirror actuator rotates the concave mirror by a first angle change, the optical actuator to rotate the scanner by a second angle change, such that display light distortions generated by the first angle change are offset by display light distortions generated by the second angle change. - View Dependent Claims (4, 5, 6)
-
-
7. A head-up display that projects display light to a projection member, the head-up display comprising:
-
a beam generator that emits a beam of light as the display light; a scanner including a moveable reflective surface, the scanner receiving the display light from the beam generator and scanning the display light; a screen that receives the display light from the scanner and reflects the display light; a concave mirror that receives the display light from the screen and reflects and expands the display light to the projection member; a concave mirror actuator that changes, based on external instructions, a concave mirror angle of incidence of the display light at the concave mirror by rotating the concave mirror; and a link mechanism that mechanically links together the concave mirror and the scanner, wherein the display light travels between the beam generator, the scanner, the screen, the concave mirror, and the projection member substantially along a common plane, when the scanner is rotated to have a default scanner angle of incidence and the concave mirror is rotated to have a default concave mirror angle of incidence, distortions in the display light at the projection member are minimized, and the link mechanism is formed to rotate, when the concave mirror actuator rotates the concave mirror by a first angle change, the scanner by a second angle change, such that display light distortions generated by the first angle change are offset by display light distortions generated by the second angle change, a change in the scanner angle of incidence due to the second angle change being proportional to a change in the concave mirror of incidence due to the first angle change.
-
Specification