Field of view optimization
Systems and methods disclosed herein include, among other aspects, a head-up display comprising an eye-box having a first dimension and a second dimension, where the head-up display is arranged to form first image content in a first image area at a first image area distance from the eye-box and second image content in a second image area at a second image area distance from the eye-box, where the first image area distance is less than the second image area distance and the first image area is at least partially overlapping in the first dimension with the second image area, and where the second image area extends less far in angular space than the first image area in at least one direction of the first dimension.
1 . A head-up display comprising an eye-box having a first dimension and a second dimension, wherein the head-up display is arranged to form first image content in a first image area at a first image area distance from the eye-box and second image content in a second image area at a second image area distance from the eye-box, wherein the first image area distance is less than the second image area distance and the first image area is at least partially overlapping in the first dimension with the second image area, and wherein the second image area extends less far in angular space than the first image area in both directions of the first dimension such that a size of the second image area in angular space is no more than that of the first image area.
2 . The head-up display of claim 1 , wherein the first image content and the second image content are formed from a display pattern displayed on a display device comprising a spatial light modulator.
3 . The head-up display of claim 2 , wherein the display pattern is a diffractive pattern such as a hologram.
4 . The head-up display of claim 3 , wherein the diffractive pattern comprises one or more of a Fourier hologram, a Fresnel hologram, a point cloud hologram, or a combination thereof.
5 . The head-up display of claim 2 , wherein the first image content and the second image content are simultaneously formed from a common display pattern displayed on the display device.
6 . The head-up display of claim 5 , wherein the common display pattern is a diffractive pattern.
7 . The head-up display of claim 1 , wherein at least one of (i) the first image content comprises first virtual image content or (ii) the second image content comprises second virtual image content.
8 . The head-up display of claim 1 , wherein the second image area extends no further in angular space than the first image area in at least one direction of the first dimension from all positions within the eye-box such that light rays forming the first image content and the second image content are delimited such that they are displayed within a volume of space defined by the first image area.
9 . The head-up display of claim 1 , wherein the first dimension is a vertical direction.
10 . The head-up display of claim 1 , wherein a center of the first image area in the second dimension is substantially aligned with a center of the second image area in the second dimension.
11 . The head-up display of claim 1 , wherein the second dimension is a horizontal direction.
12 . The head-up display of claim 1 , wherein the first image area is at least partially overlapping in the first dimension with the second image area, and wherein the second image area extends no further in angular space than the first image area in at least one direction of the first dimension from all positions within the eye-box.
13 . The head-up display of claim 1 , wherein at least one of (i) the first image distance is less than 5 meters or (ii) the second image distance is less than 20 meters.
14 . The head-up display of claim 1 , wherein at least one of (i) the first image distance is less than 3 meters or (ii) the second image distance is less than 15 meters.
15 . The head-up display of claim 1 , wherein at least one of (i) an angular field of view of the head-up display in the second dimension is in a range of about 5 to 25 degrees or (ii) the angular field of view of the head-up display in the first dimension is about 3 to 10 degrees.
16 . The head-up display of claim 1 further comprising a user-tracking system, wherein the head-up display is arranged to determine a display pattern in real-time at least partially based on an eye-box position within the eye-box determined by the user-tracking system.
17 . The head-up display of claim 16 , wherein the user-tracking system comprises an eye-tracking system.
18 . A method of displaying image content, wherein the method is performed by a head-up display comprising an eye-box having a first dimension and a second dimension, wherein the head-up display is arranged to form first image content in a first image area at a first image area distance from the eye-box and second image content in a second image area at a second image area distance from the eye-box, wherein the first image area distance is less than the second image area distance and the first image area is at least partially overlapping in the first dimension with the second image area, wherein the second image area extends less far in angular space than the first image area in both directions of the first dimension such that a size of the second image area in angular space is no more than that of the first image area, wherein the head-up display further comprises a user-tracking system, wherein the head-up display is arranged to determine a display pattern in real-time at least partially based on an eye- box position within the eye-box determined by the user-tracking system, and wherein the method comprises:
changing at least one of the first and second image area distance based on a change to the eye-box position determined by the user-tracking system.
19 . The method of displaying image content of claim 18 , wherein the first image content and the second image content are formed from a diffractive pattern displayed on a display device comprising a spatial light modulator of the head-up display, wherein at least one of the first and second image area distance is changed by changing at least one lens function associated with the diffractive pattern.