Individual warping of image contents in an imaging unit of a HUD for ideal presentation of depth information
View Patent ↗An operating method for a vehicle head-up display device has an imaging unit, which is designed to generate a light beam with display content, and a partially transparent reflecting plate which is disposed in a user's field of view, reflects the light beam to their eye box and thereby presents the display content to them in a virtual image plane behind the reflecting plate. The particular display content is divided into a plurality of presentation sub-areas, each of which is pre-distorted, as it is generated in the imaging unit, using an associated individual digital warping matrix which is predetermined or dynamically determined independently of the other presentation sub-areas, so that the individual sub-areas can be presented in the virtual image plane with different perspective characteristics.
1 . A method for operating a field-of-view display apparatus for use in a vehicle, the field of display apparatus having:
an image-generating unit of the field-of-view display apparatus, the image-generating unit being configured for generating a light beam with a desired display content;
a partially transparent reflection panel arranged and designed in the field of view of a user such that the light beam is reflected by the reflection panel to an eyebox of the user and the display content is presented to the user thereby in a virtual image plane behind the reflection panel,
wherein the method comprises the steps of:
splitting the respective display content into a plurality of presentation subregions, which are presented side-by-side in the virtual image plane; and
pre-distorting each of the plurality of presentation subregions during generation thereof in the image-generating unit with an associated individual digital warping matrix, which is predetermined or dynamically determined independently of the respective other presentation subregions, whereby the plurality of individual presentation subregions are presentable in the virtual image plane with differing perspective properties, wherein
a first presentation subregion of the plurality of presentation subregions is defined by the first presentation subregion containing first objects which are intended to be presented in the virtual image plane with a first depth effect and/or a first contact-analog effect; and
a first warping matrix associated with the first presentation subregion is configured to perspectively distort the first presentation subregion to achieve the first depth effect and/or the first contact-analog effect.
2 . The method according to claim 1 , wherein
a second presentation subregion of the plurality of presentation subregions is defined by the second presentation subregion containing second objects which are intended to be presented in the virtual image plane with a second depth effect and/or a second contact-analog effect; and
a second warping matrix associated with the second presentation subregion is configured to perspectively distort the second presentation subregions to achieve the second depth effect and/or the second contact-analog effect, wherein the second depth effect is different from the first depth effect and/or the second contact-analog effect is different from the first contact-analog effect.
3 . The method according to claim 1 , wherein
a third presentation subregion of the plurality of presentation subregions is defined by the third presentation subregion containing third objects, and
a third warping matrix associated with the third presentation subregion is configured to not distort the third presentation subregion or do so according to a predetermined image correction without any depth effect and/or contact-analog effect.
4 . The method according to claim 3 , wherein
at least some of the third objects are intended to be presented in the virtual image plane without depth effect, and are text fields with system-related or vehicle-related information or other information without relation to real vicinity objects.
5 . The method according to claim 1 , wherein
the splitting of the display content into the individual presentation subregions and/or the determination of the associated individual warping matrices is carried out dynamically depending on the respective display content to be presented.
6 . The method according to claim 1 , wherein
the splitting of the display content into the individual presentation subregions and/or the determination of the associated individual warping matrices is static by being predefined in advance.
7 . A control unit of a field-of-view display apparatus having an image-generating unit configured for generating a light beam with a desired display content; a partially transparent reflection panel arranged and designed in the field of view of a user such that the light beam is reflected by the reflection panel to an eyebox of the user and the display content is presented to the user thereby in a virtual image plane behind the reflection panel, wherein the control unit is operatively configured to:
split the respective display content into a plurality of presentation subregions, which are presented side-by-side in the virtual image plane, and
pre-distort each of the plurality of presentation subregions during generation thereof in the image-generating unit with an associated individual digital warping matrix, which is predetermined or dynamically determined independently of the respective other presentation subregions, whereby the plurality of individual presentation subregions are presentable in the virtual image plane with differing perspective properties, wherein
a first presentation subregion of the plurality of presentation subregions is defined by the first presentation subregion containing first objects which are intended to be presented in the virtual image plane with a first depth effect and/or a first contact-analog effect; and
a first warping matrix associated with the first presentation subregion is configured to perspectively distort the first presentation subregion to achieve the first depth effect and/or the first contact-analog effect.
8 . A field-of-view display apparatus for use in a vehicle, comprising:
the image-generating unit designed for generating a light beam with desired display content;
the control unit according to claim 7 ; and
the partially transparent reflection panel arranged in the beam path of the light beam.
9 . The field-of-view display apparatus according to claim 8 , further comprising:
at least one mirror which is arranged in the beam path of the light beam generated by the image-generating unit and is configured such that the light beam is incident on the reflection panel in a predetermined form and direction so as to be reflected thereby to the eyebox of the user and to thereby present the display content to the user in the virtual image plane behind the reflection panel.
10 . The field-of-view display apparatus according to claim 8 , wherein
the field-of-view display apparatus is configured to present the display content in a virtual image plane which is horizontally inclined with respect to a vehicle-side Cartesian coordinate system or is horizontal when installed in a vehicle.
11 . A vehicle having mutually perpendicular longitudinal, lateral and height axes of a vehicle-side Cartesian coordinate system, comprising:
a windshield; and
an instrument panel arranged below the windshield; and
a field-of-view display apparatus according to claim 8 wherein
the image-generating unit of the display apparatus is arranged inside the instrument panel or in or on the top side thereof, and
the reflection panel is formed as a portion of the windshield or as a combiner panel arranged in front of the windshield inside the vehicle.