# US 2019/0317322 A1 · Head-up display device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2019/0317322 A1
- Document ID: US20190317322A1
- Status: Published application
- Kind: A1
- Application number: 16/454,491
- Filed: 2019-06-27
- Published: 2019-10-17
- Earliest claimed: 2017-02-03
- Assignees: Denso Corporation
- Applicants: Denso Corporation
- Inventors: Yuichiro HAYAKAWA; Takashi TAKAZAWA; Makoto SAKAI
- Web page: https://patentgrep.com/patent/US20190317322A1

## CPC

- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- B60K 35/215: characterised by the combination of multiple visual outputs, e.g. combined instruments with analogue meters and additional displays
- B60K 35/23: Head-up displays [HUD] (optical aspects of head-up displays G02B27/01)
- B60K 35/60: Instruments characterised by their location or relative disposition in or on vehicles (arrangements of lighting devices on dashboards B60Q3/10)
- B60K 35/81: for controlling displays
- B60K 35/22: Display screens
- B60K 35/85: Arrangements for transferring vehicle- or driver-related data
- B60K 2360/1526: Dual-view displays
- G02B 2027/011: {comprising device for correcting geometrical aberrations, distortion}
- G02B 2027/0127: {comprising devices increasing the depth of field}
- G02B 2027/0145: {creating an intermediate image}
- G02B 2027/0147: {comprising a device modifying the resolution of the displayed image}
- G02B 2027/0185: {Displaying image at variable distance}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- B60K: ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES

## Abstract

A head-up display device projects a near display image and a far display image onto a windshield to visibly display a near virtual image and a far virtual image imaged at different positions from each other. The head-up display device includes a magnification optical element and a correction optical element in addition to a first display surface that emits and displays the near display image and a second display surface that emits and displays the far display image. The magnification optical element magnifies the light emitted from the first display surface and the second display surface and reflects the light toward the windshield. The correction optical element is provided in an optical path of the light of the far display image, and corrects an optical influence, together with the magnification optical element, to be generated in the far virtual image by the reflection on the windshield.

## Claims

### Claim 1

A head-up display device that projects two display images on a windshield of a mobile unit to display virtual images of the two display images at different positions to be visible for an occupant of the mobile unit, comprising:
a first display surface configured to emit a near display image to display a near virtual image at a position near the windshield, of the two display images;
a second display surface configured to emit a far display image to display a far virtual image at a position farther from the windshield than the near virtual image, of the two display images;
a magnification optical element configured to magnify light emitted from the first display surface and the second display surface and to reflect the light toward the windshield to form the near virtual image and the far virtual image respectively magnified from the near display image and the far display image; and
a correction optical element provided in an optical path of the light of the far display image, wherein
the correction optical element is configured to correct an optical influence, together with the magnification optical element, to be generated in the far virtual image by a reflection on the windshield,
the magnification optical element has a first incident area on which the light of the near display image is incident and a second incident area on which the light of the far display image is incident, and
at least a part of the first incident area overlaps with at least a part of the second incident area.

### Claim 2 (depends on 1)

The head-up display device according to claim 1, wherein
the correction optical element is disposed between the second display surface and the magnification optical element in the optical path of the light of the far display image.

### Claim 3 (depends on 1)

The head-up display device according to claim 1, wherein
the correction optical element has a reflective surface to reflect the light of the far display image emitted from the second display surface toward the magnification optical element.

### Claim 4 (depends on 3)

The head-up display device according to claim 3, wherein
the correction optical element, in a state of being mounted on the mobile unit, is located opposite to the windshield with respect to the first display surface.

### Claim 5 (depends on 3)

The head-up display device according to claim 3, wherein
the second display surface is located opposite to the first display surface with respect to the correction optical element.

### Claim 6 (depends on 1)

The head-up display device according to claim 1, wherein
the correction optical element has a refractive surface to refract light of the far display image emitted from the second display surface and to emit the light toward the magnification optical element.

### Claim 7

A head-up display device that projects two display images on a windshield of a mobile unit to display virtual images of the two display images at different positions to be visible for an occupant of the mobile unit, comprising:
a first display surface configured to emit a near display image to display a near virtual image at a position near the windshield, of the two display images;
a second display surface configured to emit a far display image to display a far virtual image at a position farther from the windshield than the near virtual image, of the two display images;
a magnification optical element configured to magnify light emitted from the first display surface and the second display surface and to reflect the light toward the windshield to form the near virtual image and the far virtual image respectively magnified from the near display image and the far display image; and
a correction optical element provided in an optical path of the light of the far display image, wherein
the correction optical element is configured to correct an optical influence, together with the magnification optical element, to be generated in the far virtual image by a reflection on the windshield,
the correction optical element has a reflective surface to reflect the light of the far display image emitted from the second display surface toward the magnification optical element, and
the correction optical element, in a state of being mounted on the mobile unit, is located opposite to the windshield with respect to the first display surface.

### Claim 8

A head-up display device that projects two display images on a windshield of a mobile unit to display virtual images of the two display images at different positions to be visible for an occupant of the mobile unit, comprising:
a first display surface configured to emit a near display image to display a near virtual image at a position near the windshield, of the two display images;
a second display surface configured to emit a far display image to display a far virtual image at a position farther from the windshield than the near virtual image, of the two display images;
a magnification optical element configured to magnify light emitted from the first display surface and the second display surface and to reflect the light toward the windshield to form the near virtual image and the far virtual image respectively magnified from the near display image and the far display image; and
a correction optical element provided in an optical path of the light of the far display image, wherein
the correction optical element is configured to correct an optical influence, together with the magnification optical element, to be generated in the far virtual image by a reflection on the windshield,
the correction optical element has a reflective surface to reflect the light of the far display image emitted from the second display surface toward the magnification optical element, and
the second display surface is located opposite to the first display surface with respect to the correction optical element.

### Claim 9 (depends on 7)

The head-up display device according to claim 7, wherein
the correction optical element is disposed between the second display surface and the magnification optical element in the optical path of the light of the far display image.

### Claim 10 (depends on 1)

The head-up display device according to claim 1, further comprising:
a near correction optical element provided in an optical path of the light of the near display image, wherein the near correction optical element is configured to correct an optical influence, together with the magnification optical element, to be generated in the near virtual image by a reflection on the windshield.