# US 2026/0063901 A1 · Head-up display device

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- Number: US 2026/0063901 A1
- Document ID: US20260063901A1
- Status: Published application
- Kind: A1
- Application number: 19/276,216
- Filed: 2025-07-22
- Published: 2026-03-05
- Earliest claimed: 2024-08-27
- Assignees: Nippon Seiki Co., Ltd.
- Applicants: Nippon Seiki Co.,Ltd.
- Inventors: Yoshiyuki Iida
- Web page: https://patentgrep.com/patent/US20260063901A1

## CPC

- G02B 27/0149: {characterised by mechanical features (G02B27/0176 takes precedence)}
- G02B 27/0101: {characterised by optical features (G02B27/0172 takes precedence)}
- G02B 2027/0159: {with mechanical means other than scaning means for positioning the whole image}
- G02B: OPTICAL ELEMENTS, SYSTEMS OR APPARATUS

## Abstract

To provide a lightweight head-up display device that can withstand heat due to concentration of light. A head-up display device includes, a display that emits display light, a correction mirror that reflects the display light to cause an upper end and a lower end of the display light to cross each other, a concave mirror that reflects the display light to project the display light outside the head-up display device, a case made of a synthetic resin, housing the display, the correction mirror, and the concave mirror, and having an opening unit through which the display light passes, and a blind cover made of metal, provided on an inner bottom surface of the case, and forming an optical path space through which the display light travels within the case.

## Claims

### Claim 1

A head-up display device, comprising:
a display that emits display light;
a correction mirror that reflects the display light to cause an upper end and a lower end of the display light to cross each other;
a concave mirror that reflects the display light to project the display light outside the head-up display device;
a case made of a synthetic resin, the case housing the display, the correction mirror, and the concave mirror, the case having an opening unit through which the display light passes; and
a blind cover made of metal and provided on an inner bottom surface of the case, the blind cover forming an optical path space through which the display light travels within the case.

### Claim 2 (depends on 1)

The head-up display device according to claim 1, wherein the blind cover includes a light blocking wall extending from a portion of an edge unit of the opening unit, to block sunlight.

### Claim 3 (depends on 1)

The head-up display device according to claim 1, comprising a mirror rotation drive unit that rotates the concave mirror around a rotation axis extending in a left-right direction, wherein
the blind cover includes,
a bottom plate unit located between the correction mirror and the concave mirror and facing the inner bottom surface of the case, and
an extension unit formed at an end unit of the bottom plate unit on the concave mirror side and protruding toward a position below the concave mirror.

### Claim 4 (depends on 1)

The head-up display device according to claim 1, wherein
the blind cover includes a plurality of wall units surrounding an outer periphery of the display light traveling from the display to the correction mirror,
the plurality of wall units include one wall facing an inner side surface of the case and at least a portion of the one wall is omitted to form a gap, and
the case includes a closing unit that closes the gap.

### Claim 5 (depends on 1)

The head-up display device according to claim 1, wherein
the blind cover includes a mirror installation frame unit holding the correction mirror and having a frame shape, and
the correction mirror is attached to the mirror installation frame unit, from a direction along a traveling direction of the display light reflected by the correction mirror.

### Claim 6 (depends on 1)

The head-up display device according to claim 1, wherein
the blind cover includes,
a bottom plate unit located between the correction mirror and the concave mirror and facing the inner bottom surface of the case, and
a plurality of positioning units formed on a back surface of the bottom plate unit facing the inner bottom surface of the case, each of the plurality of positioning units being positioned with respect to a counterpart positioning unit formed on the inner bottom surface of the case, and
at least one of the plurality of positioning units is located to face the correction mirror in a direction along the display light traveling between the correction mirror and the concave mirror.