Topic
Headlamp
About: Headlamp is a research topic. Over the lifetime, 1537 publications have been published within this topic receiving 11447 citations. The topic is also known as: headlights & headlamps.
Papers published on a yearly basis
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Papers
Patent•
26 Aug 1999TL;DR: In this article, a system for automatically controlling continuously variable headlamps on a controlled vehicle includes an imaging system capable of determining lateral and elevational locations of headlights from oncoming vehicles and tail lamps from leading vehicles.
Abstract: Continuously variable headlamps offer greater flexibility for roadway illumination but offer challenges in automatic control design. Each continuously variable headlamp has an effective illumination range varied by changing at least one parameter from a set including horizontal direction aimed, vertical direction aimed, and intensity emitted. A system for automatically controlling continuously variable headlamps on a controlled vehicle includes an imaging system capable of determining lateral and elevational locations of headlamps from oncoming vehicles and tail lamps from leading vehicles. The system also includes a control unit that can acquire an image from in front of the controlled vehicle. The image covers a glare area including points at which drivers of oncoming and leading vehicles would perceive the headlamps to cause excessive glare. The image is processed to determine if at least one oncoming or leading is within the glare area. If at least one vehicle is within the glare area, the headlamp illumination range is reduced. Otherwise, the headlamp illumination range is set to full illumination range.
373 citations
Patent•
27 Aug 1993TL;DR: In this paper, an apparatus for controlling the light distribution of a headlamp includes a vehicle speed sensor; a calculating device for estimating a position to be reached by the vehicle after a predetermined time along a forward roadway of the vehicle on the basis of vehicle speed and information representing a route of the forward roadway.
Abstract: An apparatus for controlling the light distribution of a headlamp includes a vehicle speed sensor; a calculating device for estimating a position to be reached by the vehicle after a predetermined time along a forward roadway of the vehicle on the basis of a vehicle speed and information representing a route of the forward roadway, and for calculating a direction of illumination or a range of illumination by the headlamp so that light is illuminated onto an estimated position; and a control device for controlling the direction of illumination or the range of illumination by the headlamp on the basis of a result of calculation by the calculating device. The light is illuminated onto a position, which is located ahead of the vehicle and which is viewed by a driver, for obtaining an optimum light distribution for a field of view of the driver.
266 citations
Patent•
6 May 1991TL;DR: An automatic headlamp dimmer system for switching a vehicle's headlamps from high beam to low beam when lights from another vehicle are detected in front of the vehicle is presented in this paper.
Abstract: An automatic headlamp dimmer system for switching a vehicle's headlamps from high beam to low beam when lights from another vehicle are detected in front of the vehicle. To prevent spurious responses to reflected light from signs and other sources, the dimmer system includes a light detector which is responsive only to infrared light. Also, unwanted responses to flashing lights are avoided by detecting the presence of a periodically varying light signal, and inhibiting switching between high and low beams in response thereto. The system is also capable of sensing the activation of windshield wipers and preventing headlamp switching caused by interruption of light to the system's light sensor by action of the wiper blades.
220 citations
Patent•
6 Apr 1994TL;DR: An automobile headlamp and running light control system for controlling an operating state of car headlamps and tail/marker lamps and determining an operating threshold for an automatic dimming rearview mirror system is presented in this article.
Abstract: An automobile headlamp and running light control system for controlling an operating state of automobile headlamps and tail/marker lamps, and determining an operating threshold for an automatic dimming rearview mirror system. The headlamp and running light control system including an ambient light sensing arrangement having an ambient light sensor which determines a present ambient light level in a vicinity of the vehicle, a first control arrangement for selecting an operating state of the vehicle lamps in accordance with an output of the ambient light sensor, a second control arrangement for determining the operating threshold of the automatic dimming rearview mirror system in accordance with the output of the ambient light sensor, and a lamp switching arrangement which activates and deactivates the vehicle lamps in response to the first control arrangement.
217 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2025 | 12 |
| 2024 | 12 |
| 2023 | 27 |
| 2022 | 40 |
| 2021 | 15 |
| 2020 | 55 |