Lamp for vehicle and vehicle including the same

Patent metadata

Field	Value
Publication number	US-11644173-B2
Application number	US-202217849317-A
Country	US
Kind code	B2
Filing date	Jun 24, 2022
Priority date	Jul 21, 2021
Publication date	May 9, 2023
Grant date	May 9, 2023

Abstract

Disclosed in a lamp for a vehicle, the lamp including a light source configured to emit light, and a pattern conversion unit disposed forward of the light source and configured to form two or more types of light distribution patterns by receiving the light emitted from the light source, in which the pattern conversion unit includes a light-transmitting member disposed to face the light source and configured to transmit the light emitted from the light source, and a polymer dispersed liquid crystal (PDLC) member provided to be in close contact with one surface of the light-transmitting member.

First claim

What is claimed is:

1. A lamp for a vehicle, comprising:
a light source configured to emit light; and
a pattern conversion unit positioned to receive the light emitted from the light source and configured to generate, based on the received light, a plurality of light distribution patterns, wherein the pattern conversion unit comprises:
a light-transmitting member facing the light source and configured to transmit the light emitted from the light source; and
a polymer dispersed liquid crystal (PDLC) member in contact with the light-transmitting member and comprising:
a first PDLC member divided into a plurality of regions, each region of the first PDLC member configured to generate a first light distribution pattern based on the light transmitted from the light source through the light-transmitting member; and
a second PDLC member in contact with the first PDLC member and divided into a plurality of regions arranged corresponding to the plurality of regions of the first PDLC member, respectively, each region of the second PDLC member having a shape and size corresponding to those of a corresponding region of the first PDLC member and configured to generate a second light distribution pattern different from the first light distribution pattern based on the light transmitted from the light source through the light-transmitting member and the first PDLC member,
wherein the pattern conversion unit is configured to individually control a light transmittance of each region of the first and second PDLC members to generate the plurality of light distribution patterns.

2. The lamp of claim 1 , wherein the PDLC member is attached to the light-transmitting member.

3. The lamp of claim 1 , wherein:
the light-transmitting member has first and second surfaces facing mutually opposed directions, the first surface of the light-transmitting member facing the light source, and
the PDLC member is in contact with the second surface of the light-transmitting member.

4. The lamp of claim 1 , wherein the pattern conversion unit is configured to selectively apply a current to each region of the first and second PDLC members to individually control the light transmittance of the regions of the first and second PDLC members.

5. The lamp of claim 1 , wherein:
the plurality of regions of the first PDLC member includes first and second regions, and
the PDLC member is configured to:
cause the first region to transmit the received light at a first time period, and
cause the first and second regions to transmit the received light at a second time period following the first time period.

6. The lamp of claim 5 , wherein:
the plurality of regions of the PDLC member further includes a third region, and
the PDLC member is configured to cause the first, second region and third regions to transmit the received light at a third time period following the second time period.

7. The lamp of claim 1 , wherein the PDLC member is configured to cause the entire regions of the second PDLC member and some of the regions of the first PDLC member to transmit the received light at a first time period.

8. The lamp of claim 7 , wherein:
the PDLC member further comprise a third PDLC member in contact with the second PDLC member, the third PDLC member divided into a plurality of regions, and
the PDLC member is configured to cause the entire regions of the first and third PDLC members and some of the regions of the second PDLC member to transmit the received light at a second time period following the first time period.

9. The lamp of claim 8 , wherein the PDLC member is configured to cause the entire regions of the first and second PDLC members and some of the regions of the third PDLC member to transmit the received light at a third time period following the second time period.

10. The vehicle of claim 8 , wherein the plurality of regions of the third PDLC member are arranged corresponding to the plurality of regions of the second PDLC member, respectively, each region of the third PDLC member having a shape and size corresponding to those of a corresponding region of the second PDLC member and configured to generate a third light distribution pattern different from the first and second light distribution patterns based on the light transmitted from the light source through the light-transmitting member and the first and second PDLC members.

11. The lamp of claim 1 , further comprising:
a collimator disposed between the light source and the pattern conversion unit; and
a projection lens unit disposed in front of the pattern conversion unit.

12. A vehicle comprising the lamp of claim 1 .

13. The vehicle of claim 12 , wherein the lamp comprises a backup guide lamp, a turn-signal lamp or a welcome guide lamp of the vehicle.

Assignees

• Hyundai Mobis Co Ltd

Inventors

• Han Seong Yeon

Classifications

• F21S41/645

  by electro-optic means, e.g. liquid crystal or electrochromic devices · CPC title

• F21S41/68 Primary

  by acting on screens · CPC title

• B60Q1/22

  for reverse drive · CPC title

• B60Q1/34

  for indicating change of drive direction (B60Q1/22 takes precedence) · CPC title

• F21S43/255

  Filters · CPC title