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DE-102024133005-A1 - LiDAR system

DE102024133005A1DE 102024133005 A1DE102024133005 A1DE 102024133005A1DE-102024133005-A1

Abstract

A lidar system (10) comprises a laser device (15) configured to emit laser radiation (25) towards an object (20) and a detector device (16) configured to detect radiation (26) reflected from the object (20). The lidar system (10) further comprises a light-emitting film (17) comprising a translucent material (114, 115) in which a plurality of light-emitting elements (112) are embedded, and conductive traces (109) arranged in or on the light-emitting film (17) for electrically connecting the light-emitting elements (112). The light-emitting film (17) is arranged between the laser device (15) and the object (20), and a first region (117) of the light-emitting film (17) corresponds to a transmission area of the laser radiation (25) or the reflected laser radiation (26). A second area (118) corresponds to an area that is essentially not penetrated by laser radiation (25) or the reflected laser radiation (26).

Inventors

  • Erwin Lang
  • Daniel Kraus
  • Clemens Hofmann
  • Michael Jobst

Assignees

  • AMS-OSRAM INTERNATIONAL GMBH

Dates

Publication Date
20260513
Application Date
20241112

Claims (16)

  1. LIDAR system (10) comprising: a laser device (15) configured to emit laser radiation (25) in the direction of an object (20); a detector device (16) configured to detect radiation (26) reflected from the object (20), and a luminescent film (17) comprising a translucent material (114, 115) in which a plurality of light-emitting elements (112) are embedded, further comprising conductive traces (109) arranged in or on the luminescent film (17) for electrically connecting the light-emitting elements (112), the luminescent film (17) being arranged between the laser device (15) and the object (20), a first region (117) of the luminescent film (17) corresponding to a transmission region of the laser radiation (25) or the reflected laser radiation (26), and a second region (118) corresponding to a region that is substantially not penetrated by the laser radiation (25) or the reflected laser radiation (26).
  2. LiDAR system (10) according to Claim 1 , wherein the distance between adjacent conductor tracks (109) in the first area (117) is greater than in the second area (118).
  3. LiDAR system (10) according to Claim 1 or 2 , wherein the width of the conductor tracks (109) in the first region (117) is smaller than in the second region (118), the width being measured in a direction parallel to a propagation direction of the luminescent film (17).
  4. LIDAR system (10) according to one of the preceding claims, further comprising a filter layer (111) between the laser device (15) and the luminescent film (17) or between the detector device (16) and the luminescent film (17), wherein the filter layer (111) is configured to filter electromagnetic radiation (30, 31) in a wavelength range that has been emitted by the light-emitting elements (112) adjacent to the horizontal position of the filter layer (111).
  5. LIDAR system (10) according to one of the preceding claims, further comprising a lens (105) between the laser device (15) and the light-emitting film (17).
  6. LiDAR system (10) according to Claim 5 , wherein the lens (105) comprises a Fresnel lens (108).
  7. LIDAR system (10) according to one of the preceding claims, wherein the light-emitting elements are designed as LEDs (112).
  8. LiDAR system (10) according to Claim 7 , furthermore with a first mirror layer (125) applied to side walls of the LEDs (112).
  9. LiDAR system according to Claim 7 or 8 , furthermore with a second mirror layer (126) which is applied to one side of the LEDs (112) facing the laser device (15).
  10. LiDAR system (10) according to Claim 9 , wherein the LEDs (112) are applied to a carrier film (114) and the second mirror layer (126) is applied to a side of the carrier film (114) facing away from the LEDs (112).
  11. LIDAR system (10) according to one of the Claims 7 until 10 , furthermore with a first absorbing layer (127) which is configured to reduce reflection of electromagnetic radiation emitted by the laser device (15), wherein the first absorbing layer (127) is applied to side walls of the LEDs (112).
  12. LIDAR system (10) according to one of the Claims 7 until 11 , furthermore with a second absorbing layer (128) which is arranged to reduce reflection of electromagnetic radiation emitted by the laser device (15), wherein the second absorbing layer (128) is applied to a side of the LEDs (112) facing the laser device (15).
  13. LIDAR system (10) according to one of the preceding claims, wherein the light-emitting film (17) further comprises resistive heating elements (119).
  14. LiDAR system (10) according to Claim 13 , wherein the resistive heating elements (119) are arranged in the second area (118) of the luminescent film (17).
  15. LIDAR system (10) according to one of the preceding claims, wherein the laser device (15) is configured to emit laser radiation (25) in a wavelength range different from a wavelength range emitted by the light-emitting elements (112).
  16. LiDAR system (10) according to Claim 15 , wherein the laser device (15) is configured to emit laser radiation (15) in the IR range.

Description

LiDAR (Light Detection and Ranging) systems are used in a variety of applications, such as distance measurement or mapping a vehicle's surroundings. Efforts are generally underway to provide improved LiDAR systems. The present invention is based on the objective of providing an improved LIDAR system. According to various embodiments, the object of the patent is defined by the subject matter of the independent claims. Further developments are defined in the dependent claims. A LiDAR system comprises a laser device configured to emit laser radiation toward an object and a detector device configured to detect radiation reflected from the object. The LiDAR system further comprises a light-emitting film, which is a transparent material in which a plurality of light-emitting elements are embedded, and which has conductive traces arranged in or on the film for electrically connecting the light-emitting elements. The light-emitting film is positioned between the laser device and the object, and a first region of the film corresponds to a transmission area of the laser radiation or the reflected laser radiation. A second region corresponds to a region that is substantially not penetrated by the laser radiation or the reflected laser radiation. For example, the distance between adjacent conductor tracks is greater in the first area than in the second area. According to embodiments, the width of the conductor tracks in the first area is smaller than in the second area, wherein the width is measured in a direction parallel to a propagation direction of the luminescent film. The LIDAR system can further comprise a filter layer between the laser device and the luminescent film or between the detector device and the luminescent film, wherein the filter layer is configured to filter electromagnetic radiation in a wavelength range that has been emitted by the light-emitting elements adjacent to the horizontal position of the filter layer. The LIDAR system can further include a lens between the laser device and the light-emitting film. For example, the lens may be a Fresnel lens. According to embodiments, the light-emitting elements are designed as LEDs. The LIDAR system can also have a first reflective layer applied to the side walls of the LEDs. According to further embodiments, the LIDAR system can have a second mirror layer applied to one side of the LEDs facing the laser device. For example, the LEDs are applied to a carrier film, and the second mirror layer is applied to a side of the carrier film facing away from the LEDs. The LIDAR system can further include a first absorbing layer designed to reduce reflection of electromagnetic radiation emitted by the laser device, wherein the first absorbing layer is applied to sidewalls of the LEDs. According to further embodiments, the LIDAR system further comprises a second absorbing layer which is configured to reduce reflection of electromagnetic radiation emitted by the laser device, wherein the second absorbing layer is applied to a side of the LEDs facing the laser device. According to embodiments, the luminescent film can further comprise resistive heating elements. For example, the resistive heating elements can be arranged in the second area. According to embodiments, the laser device can be configured to emit laser radiation in a wavelength range that differs from a wavelength range emitted by the light-emitting elements. For example, the laser device can be set up to emit laser radiation in the IR range. The accompanying drawings serve to illustrate exemplary embodiments of the invention. The drawings depict these embodiments and, together with the description, serve to explain them. Further exemplary embodiments and many of the intended advantages will become apparent from the following detailed description. The elements and structures shown in the drawings are not necessarily They must be shown to scale. Identical reference symbols refer to identical or corresponding elements and structures. 1 shows a schematic view of a LIDAR system according to embodiments. 2A shows a horizontal cross-sectional view to illustrate arrangements of conductor tracks. 2B shows another horizontal cross-sectional view to illustrate arrangements of conductor tracks and heating elements. 2C shows another view for displaying heating elements. 3 shows a vertical cross-sectional view to illustrate further elements of the LIDAR system. The 4A to 4C These are vertical cross-sectional views to illustrate further features of the luminescent film according to embodiments. The 5A to 5C These are vertical cross-sectional views to illustrate further features of the luminescent film according to embodiments. 6 shows another view of the LIDAR system according to embodiments. The following detailed description refers to the accompanying drawings, which form part of the disclosure and show specific embodiments for illustrative purposes. In this context, directional terminology such as "top," "bottom," "