CN-121986038-A - Vehicle lamp, control device for variable light distribution, and software program

CN121986038ACN 121986038 ACN121986038 ACN 121986038ACN-121986038-A

Abstract

A control device (300) controls the light distribution variable lamp (110). The variable light distribution lamp (110) includes a plurality of control Pixels (PIX) capable of independently controlling the gradation, and is configured to be capable of emitting a light beam having an intensity distribution corresponding to the gradation of the plurality of control Pixels (PIX). An interface circuit (302) receives vehicle ROI information from a vehicle that indicates a range of presence of a preceding vehicle. The arithmetic processing unit (304) uses a rectangle containing n existence ranges indicated by the last received prescribed n (n≥2) vehicle ROI information as a reference area (REF), and determines a light distribution Pattern (PTN) with illuminance gradually changing based on the reference area (REF). A control device (300) controls the gradation of a plurality of control pixels based on a light distribution Pattern (PTN).

Inventors

KAMIYA KYOUHEI
KODA HIROTAKA

Assignees

株式会社小糸制作所

Dates

Publication Date: 20260505
Application Date: 20241003
Priority Date: 20231012

Claims (6)

1. A control device for controlling a variable light distribution lamp is characterized in that, The variable light distribution lamp includes a plurality of control pixels capable of independently controlling gray scales, and is configured to be capable of emitting a light beam having an intensity distribution corresponding to the gray scales of the plurality of control pixels; the control device is provided with: an interface circuit that receives light shielding information indicating a presence range of a preceding vehicle from the vehicle, and A calculation processing unit that determines a light distribution pattern in which illuminance gradually changes with reference to a reference area, using a rectangle including n existence ranges indicated by the prescribed n pieces of light shielding information that have been received recently as the reference area, wherein n is not less than 2; the control device controls the gradation of the plurality of control pixels based on the light distribution pattern.
2. The control device of claim 1, wherein, The arithmetic processing unit obtains The leftmost coordinate x LEFT in the n presence ranges, The right-most coordinate x RIGHT in the n presence ranges, The lowest end coordinate y BOTTOM in the n presence ranges, The coordinates y TOP of the uppermost of the n presence ranges, Generated to (x LEFT ,y BOTTOM ) (x LEFT ,y TOP ) (x RIGHT ,y BOTTOM ) (x RIGHT ,y TOP ) The reference region being the vertex.
3. The control device according to claim 1 or 2, wherein, In the light distribution pattern, the illuminance outside the reference region is 100%, the illuminance in the inside offset region offset inward from the reference region is 0%, and the illuminance between the reference region and the inside offset region gradually changes.
4. A lamp for a vehicle, characterized in that, The variable light source device comprises a variable light distribution lamp comprising a plurality of control pixels capable of independently controlling gray scales, configured to emit light beams having intensity distribution corresponding to the gray scales of the plurality of control pixels, and A control device that receives shade information indicating a range of existence of a preceding vehicle from the vehicle, and controls the light distribution variable lamp based on the shade information; The control device controls the gradation of the plurality of control pixels of the variable light distribution lamp with respect to a reference area including a rectangle of n existing ranges indicated by the prescribed n pieces of light shielding information received recently, where n is not less than 2, so that illuminance gradually changes with respect to the reference area.
5. A software program for controlling a variable light distribution lamp, characterized in that, The variable light distribution lamp includes a plurality of control pixels capable of independently controlling gray scales, and is configured to be capable of emitting a light beam having an intensity distribution corresponding to the gray scales of the plurality of control pixels; the software program causes the processor to perform the steps of: A step of storing light shielding information indicating a presence range of a preceding vehicle in a memory, A step of determining a light distribution pattern having illuminance gradually changed with reference to a reference area, which is a rectangle including n existence ranges indicated by the prescribed n pieces of light shielding information received recently, where n is equal to or greater than 2, and And controlling the gray scale of the plurality of control pixels based on the light distribution pattern.
6. A control device for controlling a variable light distribution lamp is characterized in that, The variable light distribution lamp includes a plurality of control pixels capable of independently controlling gray scales, and is configured to be capable of emitting a light beam having an intensity distribution corresponding to the gray scales of the plurality of control pixels; The control device controls the light distribution variable lamp such that when the light spot moves in the horizontal direction, the lateral width of the light shielding portion expands following the light spot in the horizontal direction, and a light distribution in which illuminance gradually changes is formed around the light shielding portion.

Description

Vehicle lamp, control device for variable light distribution, and software program Technical Field The present disclosure relates to a vehicle lamp. Background A vehicle lamp is generally capable of switching between a low beam and a high beam. The low beam illuminates the vicinity of the vehicle with a predetermined illuminance, and determines that there is a light distribution regulation so as not to cause glare to the oncoming vehicle and the preceding vehicle, and is mainly used when traveling in urban areas. On the other hand, the high beam illuminates a distant place with a high illuminance, and is mainly used when traveling at a high speed on a road where the number of oncoming vehicles and preceding vehicles is small. Therefore, the high beam is more excellent in visibility for the driver than the low beam, but has a problem of causing glare for the driver and the pedestrian of the vehicle existing in front of the vehicle. In recent years, an ADB (ADAPTIVE DRIVING Beam: adaptive high Beam) technology has been proposed in which a light distribution pattern of high Beam is dynamically and adaptively controlled based on a state around a vehicle. The ADB technology detects the presence or absence of a preceding vehicle, an oncoming vehicle (collectively referred to as a preceding vehicle), and a pedestrian in front of the vehicle, and reduces glare to the vehicle or the pedestrian by, for example, dimming an area corresponding to the vehicle or the pedestrian. Prior art literature Patent literature Patent document 1 International publication WO2021/182151A1 Patent document 2 International publication WO2021/200701A1 Disclosure of Invention Technical problem to be solved by the invention The resolution of ADB control is advancing by using a spatial light modulator such as an LED array, DMD, or liquid crystal. In the ADB control with high resolution, a front vehicle is detected by a sensor such as a camera or LiDAR, and a light shielding range is controlled. Specifically, based on the output of the sensor, information indicating the range in which the preceding vehicle exists, which is referred to as vehicle ROI (Region Of Interest: region of interest), is generated. For example, the vehicle ROI information may include angle information indicating a left end and angle information indicating a right end of a vehicle body of a preceding vehicle with respect to a horizontal direction, and may include angle information indicating an upper end and angle information indicating a lower end of the vehicle body with respect to a vertical direction. The ADB headlamp forms a light distribution including a shade portion based on the vehicle ROI information. The present inventors studied light distribution in which illuminance gradually changes in the outline of a light shielding portion (hereinafter, also referred to as blur light distribution). The blurred light distribution contributes to reduction of discomfort in most driving scenes. On the vehicle side, there is a case where the detection accuracy of the existence range of the preceding vehicle is lowered. Specifically, a phenomenon occurs in which the existing range of the preceding vehicle shown by the vehicle ROI information vibrates to a small extent. In this case, if light distribution is formed based on the vehicle ROI information, the light shielding portion with blurred outline vibrates slightly, and instead gives a sense of discomfort. The present disclosure has been made under such circumstances, and an exemplary object thereof is to provide a vehicle lamp that reduces discomfort associated with ADB control. Technical means for solving the technical problems One embodiment of the present disclosure relates to a control device that controls a light distribution variable lamp. The variable light distribution lamp includes a plurality of control pixels capable of controlling gradation independently, and is configured to be capable of emitting a light beam having an intensity distribution corresponding to gradation of the plurality of control pixels. The control device is provided with an interface circuit which receives light shielding information indicating the existence range of a preceding vehicle from the vehicle, and an arithmetic processing unit which determines a light distribution pattern, the illuminance of which gradually changes with reference to a reference area, by using a rectangle containing n existence ranges indicated by the prescribed n (n≥2) light shielding information which has been received recently as the reference area, and controls the gradation of a plurality of control pixels based on the light distribution pattern. Another aspect of the present disclosure relates to a vehicle lamp. The vehicle lamp includes a light distribution variable lamp including a plurality of control pixels capable of independently controlling gradation, the light distribution variable lamp being configured to be capable of emitting a light beam having an