# US 10,767,830 B2 · Lighting and/or signalling device with liquid-crystal display, in particular for a motor vehicle

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- Number: US 10,767,830 B2
- Document ID: US10767830B2
- Status: Granted
- Kind: B2
- Application number: 16/329,470
- Filed: 2017-08-30
- Published: 2019-08-29
- Granted: 2020-09-08
- Earliest claimed: 2016-08-31
- Assignees: Valeo Vision
- Applicants: Valeo Vision
- Inventors: Pierre Albou
- Web page: https://patentgrep.com/patent/US10767830B2

## CPC

- F21S 43/26: {Refractors, transparent cover plates, light guides or filters not provided in groups F21S43/235 - F21S43/255}
- F21S 41/143: the main emission direction of the LED being parallel to the optical axis of the illuminating device
- F21S 41/645: {by electro-optic means, e.g. liquid crystal or electrochromic devices}
- F21S 43/14: Light emitting diodes [LED]
- F21S 43/16: Light sources where the light is generated by photoluminescent material spaced from a primary light generating element
- F21S 43/40: characterised by the combination of reflectors and refractors
- G02F 1/133504: {Diffusing, scattering, diffracting elements (associated to illuminating devices G02F1/133606)}
- G02F 1/133553: {Reflecting elements (associated to illuminating devices G02F1/133605)}
- G02F 1/133603: {with LEDs}
- F21W 2103/35: Brake lights
- F21W 2103/45: Reversing lights
- F21Y 2115/10: Light-emitting diodes [LED]
- G02F 2201/56: Substrates having a particular shape, e.g. non-rectangular
- F21S: NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- F21W: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO USES OR APPLICATIONS OF LIGHTING DEVICES OR SYSTEMS
- F21Y: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED

## Abstract

A device for a motor vehicle in order to transmit information to road users for safety is provided. The device includes a light source emitting a primary beam, a scattering element, at least one liquid-crystal display arranged between the light source and the scattering element, the at least one liquid crystal display being controlled in order to selectively transmit at least one portion of the primary beam toward the scattering element to form a secondary beam with at least two different distributions of light, and an image of the at least one liquid-crystal display being formed on the scattering element.

## Claims

### Claim 1

A device for a motor vehicle, the device comprising:
a light source emitting a primary beam;
a scattering element; and
at least one liquid-crystal display arranged between the light source and the scattering element, the at least one liquid crystal display
being controlled in order to selectively transmit at least one portion of the primary beam toward the scattering element to form a secondary beam with at least two different distributions of light, an image of the at least one liquid-crystal display being formed on the scattering element, wherein the at least one liquid-crystal display is curved so as to allow a small angle of incidence to be obtained for each of rays of the primary beam on the at least one liquid-crystal display, the small angle of incidence being smaller than or equal to 30° degrees.

### Claim 2 (depends on 1)

The device according to claim 1, wherein at least one dimension of the at least one liquid-crystal display is smaller than the corresponding dimension of the image formed on the scattering element.

### Claim 3 (depends on 1)

The device according to claim 1, wherein at least one dimension of the at least one liquid-crystal display is smaller than the corresponding dimension of the scattering element.

### Claim 4 (depends on 1)

The device according to claim 1 comprising at least two liquid-crystal displays placed angularly about the source so as to allow the small angle of incidence to be obtained for each of the rays of the primary beam on each liquid-crystal display.

### Claim 5 (depends on 1)

The device according to claim 1 comprising at least two light sources and two liquid-crystal displays, each of the at least two light sources being designed so as to illuminate one or other of the two liquid-crystal displays, respectively.

### Claim 6 (depends on 1)

The device according to claim 1, wherein the primary beam is divergent.

### Claim 7 (depends on 1)

The device according to claim 1, wherein the light source is point-like.

### Claim 8 (depends on 1)

The device according to claim 1, wherein the scattering element comprises luminophores suitable for converting wavelengths emitted by the light source into different wavelengths so as to obtain a different colour from that of the light source in particular by fluorescence or phosphorescence.

### Claim 9 (depends on 1)

A lighting module for the motor vehicle, the lighting module comprising the device according to claim 1.