# US 11,999,286 B2 · Vehicle drawing device

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- Number: US 11,999,286 B2
- Document ID: US11999286B2
- Status: Granted
- Kind: B2
- Application number: 17/640,436
- Filed: 2020-08-11
- Published: 2022-10-27
- Granted: 2024-06-04
- Earliest claimed: 2019-09-09
- Assignees: Koito Manufacturing Co., Ltd.
- Applicants: Koito Manufacturing Co., Ltd.
- Inventors: Yuichi Shibata
- Web page: https://patentgrep.com/patent/US11999286B2

## CPC

- B60Q 1/38: using immovably-mounted light sources, e.g. fixed flashing lamps
- B60Q 1/381: {with several light sources activated in sequence, e.g. to create a sweep effect}
- B60Q 2400/50: Projected symbol or information, e.g. onto the road or car body
- B60Q: ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL

## Abstract

A vehicle drawing device draws a sign on a road surface with amber-colored light. When a luminance of the sign is assumed as a road surface drawing luminance, and a luminance in a surrounding environment of a driving vehicle is assumed as a background luminance, the amber-colored light is irradiated such that a luminance contrast calculated by the road surface drawing luminance and the background luminance is 0.2 or more.

## Claims

### Claim 1

A vehicle drawing device that draws a sign on a road surface with amber-colored light,
wherein, when a luminance of the sign is assumed as a road surface drawing luminance, and a luminance in a surrounding environment of a driving vehicle is assumed as a background luminance, the amber-colored light is irradiated such that a luminance contrast calculated by the road surface drawing luminance and the background luminance is 0.2 or more, and
wherein an angle formed by an inclination direction at a tip end of the sign with respect to an irradiation direction of the amber-colored light is less than 120 degrees.

### Claim 2 (depends on 1)

The vehicle drawing device according to claim 1, wherein an ON/OFF of the vehicle drawing device is performed at a same timing as an ON/OFF of a turn signal lamp.

### Claim 3 (depends on 1)

The vehicle drawing device according to claim 1, wherein the amber-colored light is irradiated such that the luminance contrast is less than 1.0.

### Claim 4

A vehicle drawing device that draws a sign on a road surface with amber-colored light,
wherein a maximum luminous intensity in a light distribution pattern of light irradiated from the vehicle drawing device is three times or more of a maximum luminous intensity in a light distribution pattern of light irradiated from a turn signal lamp, and
wherein an angle formed by an inclination direction at a tip end of the sign with respect to an irradiation direction of the amber-colored light is less than 120 degrees.

### Claim 5 (depends on 4)

The vehicle drawing device according to claim 4, wherein an ON/OFF of the vehicle drawing device is performed at a same timing as an ON/OFF of the turn signal lamp.

### Claim 6 (depends on 4)

The vehicle drawing device according to claim 4, wherein a plurality of signs is drawn, and
a maximum luminous intensity in a light distribution pattern of light that draws at least one sign among lights that draw the plurality of signs is three times or more of the maximum luminous intensity in the light distribution pattern of the light irradiated from the turn signal lamp.

### Claim 7 (depends on 4)

The vehicle drawing device according to claim 4, wherein the maximum luminous intensity in the light distribution pattern of light irradiated from the vehicle drawing device is twenty times or less of the maximum luminous intensity in the light distribution pattern of light irradiated from the turn signal lamp.