Search

EP-4418822-B1 - HEADLAMP LIGHT-SENSING DETECTION DEVICE, AND HEADLAMP

EP4418822B1EP 4418822 B1EP4418822 B1EP 4418822B1EP-4418822-B1

Inventors

  • LI, WENJIE

Dates

Publication Date
20260506
Application Date
20230428

Claims (14)

  1. A headlamp light-sensing detection device, comprising a condensing lens (11), a lens hood (2) , a first lens (1) and a light-sensing element (7), wherein the condensing lens is arranged in front of the light-sensing element, and is configured to converge external light to the light-sensing element; the lens hood is arranged between the light-sensing element and the condensing lens, and is configured to shield the light-sensing element from the influence of light sources of a headlamp comprising the headlamp light-sensing detection device, so as to reduce optical crosstalk; and the light-sensing element is configured to provide, according to the brightness of sensed external light, a corresponding signal for controlling the increasing and reducing of light-emitting brightness of the headlamp, the headlamp light-sensing detection device being characterized in that the condensing lens is integrally formed with the first lens (1) of the headlamp light-sensing detection device, the condensing lens is of a convex lens structure, and the first lens is configured to diffuse light of a high beam light source (9) and a low beam light source (10) in the headlamp.
  2. The headlamp light-sensing detection device as claimed in claim 1, wherein the light-sensing element is arranged on a Printed Circuit Board, PCB, (6) and a Micro Control Unit, MCU, chip is mounted on the PCB; the PCB is configured to supply power to the light-sensing element and the MCU chip; the PCB is configured to carry signal transmission between the light-sensing element and the MCU chip; and the PCB is further configured to output a control signal of the MCU chip.
  3. The headlamp light-sensing detection device as claimed in claim 1, further comprising a housing (5) with a recessed cavity (8), the lens hood and a lamp panel (4), wherein the first lens and the housing are detachably connected to coat the lamp panel and the lens hood in the recessed cavity; the PCB is mounted on the side of the housing that is away from the first lens; and the housing is arranged between the PCB and the first lens.
  4. The headlamp light-sensing detection device as claimed in claim 3, wherein the lamp panel is provided with a first light hole (41); the surface of the recessed cavity of the housing is provided with a second light hole (51); and the first light hole, the second light hole and the light-sensing element are all aligned with the condensing lens.
  5. The headlamp light-sensing detection device as claimed in claim 3, wherein one end of the lens hood is in contact with and aligned with the condensing lens, and a gasket (3) is arranged between the other end of the lens hood and the lamp panel; and the gasket and the first light hole are arranged in an aligned manner.
  6. The headlamp light-sensing detection device as claimed in claim 3, wherein the lamp panel is provided with the high beam light source and the low beam light source; and the lamp panel is configured to supply power to the high beam light source and the low beam light source, and is configured to transmit the signal for controlling the increasing and reducing of the light-emitting brightness to the high beam light source and the low beam light source.
  7. The headlamp light-sensing detection device as claimed in claim 1, wherein the light-sensing element has a discontinuous multi-stage triggering threshold; for the sensed external light, when the brightness of the sensed external light reaches a stage triggering threshold each time, different fixed photoelectric parameters are generated; and a MCU chip of the headlamp light-sensing detection device is configured to provide a corresponding fixed control signal by reading the fixed photoelectric parameters of the light-sensing element.
  8. The headlamp light-sensing detection device as claimed in claim 1, wherein the light-sensing element has a triggering threshold; for the sensed external light, after the brightness of the sensed external light reaches the triggering threshold, the light-sensing element performs steplessly adjustment in real time according to the brightness of the sensed external light light, and is configured to provide real-time photoelectric parameters; and a MCU chip of the headlamp light-sensing detection device is configured to provide a corresponding continuous control signal by reading the real-time photoelectric parameters of the light-sensing element.
  9. A headlamp, comprising: a first lens (1); a condensing lens (11); a lens hood (2); a lamp panel (4), provided with a high beam light source (9) and a low beam light source (10), wherein the lamp panel is provided with a first light hole (41); a housing (5), provided with a recessed cavity, wherein the recessed cavity (8) is configured to accommodate the first lens, the lens hood and the lamp panel, and the housing is provided with a second light hole (51); and a PCE (6), provided with a light-sensing element (7), wherein the condensing lens is configured to converge external light to the light-sensing element, the light-sensing element is configured to provide, according to the intensity of sensed external light, a corresponding signal for controlling the increasing and reducing of light-emitting brightness of the headlamp, the first lens, the lens hood and the lamp panel are arranged on one side of the housing, and the PCB is arranged on the other side of the housing; the lens hood is arranged between the condensing lens and the lamp panel; the condensing lens, the lens hood, the first light hole, the second light hole and the light-sensing element are arranged in an aligned manner; after being gathered by the condensing lens, the external sensed light successively passes through the lens hood, the first light hole and the second light hole, and is finally projected to the light-sensing element; and the lens hood is configured to shield the light-sensing element from the light projected by the high beam light source and the low beam light source, the headlamp being characterized in that the condensing lens is integrally formed with the first lens, the condensing lens is of a convex lens structure, and the first lens is configured to diffuse light of the high beam light source and the low beam light source in the headlamp.
  10. The headlamp as claimed in claim 9, wherein the first lens is provided with a mounting groove (18) that allows the lens hood to be embedded; and the mounting groove is configured to ensure that the condensing lens and the lens hood are arranged in an aligned manner.
  11. The headlamp as claimed in claim 9, wherein a gasket (3) is arranged between the lens hood and the lamp panel.
  12. The headlamp as claimed in claim 9, wherein each of two sides of the lamp panel is provided with a positioning hole (12); the side of the first lens that faces the lamp panel is provided with two positioning pins (13); the two positioning pins correspond to the positioning holes on a one-to-one base; and the positioning pins are inserted into the positioning holes, so as to realize the aligned arrangement between the condensing lens and the first light hole.
  13. The headlamp as claimed in claim 9, wherein the side of the first lens that faces the lamp panel is provided with four mounting columns (14); the mounting columns are provided with internal threaded holes; the housing is provided with four through holes (15); the PCB is provided with four mounting holes; the four mounting columns, the four through holes and the four mounting holes are in one-to-one correspondence; and bolts first penetrate the mounting holes and the through holes, and then are locked in the internal threaded holes of the mounting columns, so as to achieve a detachable connection between the PCB and the first lens, and fix the first lens, the lens hood and the lamp panel in the recessed cavity of the housing.
  14. The headlamp as claimed in claim 9, wherein four buffer rings (17) are arranged between the housing and the PCB; and the four buffer rings and the four mounting holes are arranged in one-to-one correspondence and arranged in an aligned manner.

Description

Technical Field The present application relates to the technical field of headlamps, and specifically, to a headlamp light-sensing detection device, and a headlamp. Background In a current headlamp, a plurality of brightness gears are usually designed. In an environment where a user uses the headlamp, there are various obstacles with different distances and reflectivity. If the user has been turned on a low brightness gear, in open scenes or scenes with low reflectivity, the user will not feel bright enough and may not be able to see clearly. If the user has been turned on a high brightness gear, in narrow scenes or scenes with high reflectivity, the user will feel very dazzling, or even threaten his/her safety, such that the user may need to frequently switch gears to adapt changes in scenes. Therefore, there is indeed a need for an automatic adjustment function of headlamp brightness. The automatic brightness adjustment function of the current headlamp is implemented generally by depending on a light-sensing element for sensing the light intensity of an environment. However, a lens for collecting reflected light is arranged independent of a main lens. Since the main lens and the lens for collecting light are separately arranged, the current headlamp is complex in entire structure and not easy to assemble. A patent document with Application Publication No. CN 115183166 A discloses a mobile lighting apparatus with automatic dimming. By means of arranging a lens for converging external entering light, then using optical fiber to receive light from the lens and guiding the external entering light to a light-sensing receiver, the light-sensing receiver may transmit a signal to a driving plate, so as to control the increasing and reducing of light-emitting brightness of a light-emitting unit. By means of the patent application, the lens receiving ambient light is integrated with a main lens. Although the structure is simplified, there are still problems with optical crosstalk. It can be seen that, there are still some defects in the related art, and it is necessary to make further improvements to the related art. GB 2 595 010 A discloses the preamble of the independent claims. Summary The present application provides a headlamp light-sensing detection according to claim 1 and a headlamp according to claim 9, to solve the problems that a headlamp is complex in structure and not easy to assemble and there is optical crosstalk in the related art. Preferred embodiments are defined in the dependent claims. In order to implement the above objective, the present application uses the following technical solutions. A headlamp light-sensing detection device according to claim 1. Further, the headlamp light-sensing detection device further includes a housing with a recessed cavity, the lens hood and a lamp panel. A first lens and the housing are detachably connected to coat the lamp panel and the lens hood in the recessed cavity. The PCB is mounted on the side of the housing that is away from the first lens; and the housing is arranged between the PCB and the first lens. Further, the lamp panel is provided with a first light hole; the surface of the recessed cavity of the housing is provided with a second light hole. The first light hole, the second light hole and the light-sensing element are all aligned with the condensing lens. Further, one end of the lens hood is in contact with and aligned with the condensing lens, and a gasket is arranged between the other end of the lens hood and the lamp panel. The gasket and the first light hole are arranged in an aligned manner. Further, the lamp panel is provided with a high beam light source and a low beam light source. The lamp panel supplies power to the high beam light source and the low beam light source, and is capable of transmitting the signal for controlling the increasing and reducing of the light-emitting brightness to the high beam light source and the low beam light source. Further, the lamp panel is electrically connected to the PCB, so as to transmit a current and the control signal. Further, the light-sensing element has a discontinuous multi-stage triggering threshold. For received light, when the brightness of the light reaches a stage triggering threshold each time, different fixed photoelectric parameters are generated. The MCU chip provides a corresponding fixed control signal by means of collecting the fixed photoelectric parameters of the light-sensing element. Further, the light-sensing element has a triggering threshold. For received light, after the brightness of the light reaches the triggering threshold, the light-sensing element performs steplessly adjustment in real time according to the brightness of the received light, and provides real-time photoelectric parameters. The MCU chip provides a corresponding continuous control signal by means of collecting the real-time photoelectric parameters of the light-sensing element. A headlamp according to cl