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CN-121993752-A - Light source and DMD chip coupling device of automobile pixel headlight

CN121993752ACN 121993752 ACN121993752 ACN 121993752ACN-121993752-A

Abstract

The invention discloses a light source and DMD chip coupling device of an automobile pixel headlight, which belongs to the technical field of automobile illumination and comprises a mounting shell, a light source module, a DMD chip module, a heat conduction seat, a driver and a heat dissipation module, wherein light dual alignment and convergence are realized through a micro lens array, a convex ball lens and a converging lens of the light source module, the light propagation direction of a reflecting mirror and a TIR prism is accurately changed, a three-dimensional micro-motion platform of the DMD chip module can be finely adjusted in multiple directions to compensate assembly, vibration and thermal expansion offset, a heat transfer rod of the heat conduction seat filters vibration through damping effect, offset caused by rigid transfer is avoided, the light is ensured to be always accurately coupled to the DMD chip, the coupling precision and stability are greatly improved, the high-definition light projection effect of the automobile pixel headlight is ensured, and glare interference is avoided.

Inventors

  • WU XINMIN

Assignees

  • 深圳拜波赫技术有限公司

Dates

Publication Date
20260508
Application Date
20260323

Claims (10)

  1. 1. The light source and DMD chip coupling device of the automobile pixel headlight comprises a mounting shell (1) and is characterized in that a heat dissipation module (6) is fixedly arranged at the inner bottom end of the mounting shell (1), two groups of symmetrically distributed drivers (8) are fixedly arranged at the upper ends of the heat dissipation module (6), heat conduction seats (7) are fixedly arranged at the upper ends of the drivers (8), a light source module (2) and a DMD chip module (3) which are symmetrically distributed are respectively and fixedly arranged at the upper ends of the heat conduction seats (7), locking modules (4) are fixedly arranged at the front end and the rear end of the mounting shell (1), and an acceleration sensor (5) is fixedly arranged at the upper ends of the locking modules (4).
  2. 2. The device for coupling the light source and the DMD chip of the automobile pixel headlight according to claim 1, wherein the light source module (2) comprises a light source mounting seat (21), an LED mounting groove (22) is formed in the upper end of the light source mounting seat (21), a plurality of linearly distributed LED lamp beads (23) are fixedly mounted in the LED mounting groove (22), a converging lens (26) is arranged above the LED lamp beads (23), a reflecting mirror (27) is arranged on the converging lens (26), and the reflecting direction of the reflecting mirror (27) faces the DMD chip module (3).
  3. 3. The device for coupling the light source of the automotive pixel headlight with the DMD chip according to claim 2, wherein the micro lens array (24) is fixedly arranged at the top of the LED mounting groove (22), and a plurality of convex ball lenses (25) corresponding to the LED lamp beads (23) are integrally formed on the micro lens array (24).
  4. 4. The device for coupling the light source and the DMD chip of the automobile pixel headlight according to claim 3, wherein the DMD chip module (3) comprises a DMD mounting seat (31), a DMD mounting groove (32) is formed in the upper end of the DMD mounting seat (31), a three-dimensional micro-motion platform (33) is fixedly arranged in the DMD mounting groove (32), a DMD chip (34) is fixedly arranged at the upper end of the three-dimensional micro-motion platform (33), and a TIR prism (35) corresponding to the reflecting mirror (27) is arranged at the upper end of the DMD chip (34).
  5. 5. The device for coupling a light source of a pixel headlight of an automobile with a DMD chip of claim 4, wherein the heat dissipation module (6) comprises a liquid cooling plate (61), a heat absorbing plate (62) is fixedly arranged at the upper end of the liquid cooling plate (61), and a serpentine liquid cooling pipeline (63) is arranged in an inner cavity of the liquid cooling plate (61).
  6. 6. The device for coupling a light source to a DMD chip of a pixel headlight of an automobile of claim 5, wherein the heat conducting base (7) comprises an upper heat conducting plate (71), a lower heat conducting plate (72) and a plurality of heat transfer rods (73) fixedly installed between the upper heat conducting plate and the lower heat conducting plate, the upper heat conducting plate (71) is fixedly installed at the lower ends of the light source installation base (21) and the DMD installation base (31) respectively, and the lower heat conducting plate (72) is abutted against the upper surface of the heat absorbing plate (62).
  7. 7. The device for coupling a light source of a car pixel headlight with a DMD chip according to claim 6, wherein the heat transfer rod (73) comprises a sleeve (731) fixedly installed on the upper surface of the lower heat conducting plate (72), a heat conducting rod (733) is installed in the sleeve (731) in a sliding mode, the heat conducting rod (733) is fixedly installed on the lower surface of the upper heat conducting plate (71), a sealing ring (732) is fixedly installed at an opening on the upper side of the sleeve (731), heat conducting oil is filled in the sleeve (731), a plurality of evenly distributed balance holes (735) are formed in the side wall of the lower end of the sleeve (731), an elastic bag sleeve (736) communicated with the balance holes (735) is fixedly sleeved on the outer surface of the lower end of the sleeve (731), and a porous plate (734) is fixedly installed in the sleeve (731).
  8. 8. The device for coupling a light source of a pixel headlight of an automobile with a DMD chip of claim 7, wherein the driver (8) comprises a shape memory alloy actuating plate (81), the lower end of the shape memory alloy actuating plate (81) is fixedly arranged at the upper end of the liquid cooling plate (61) through a plurality of supporting columns (82), a plurality of uniformly distributed ball plungers (83) are fixedly arranged at the upper end of the shape memory alloy actuating plate (81), and a plurality of ball grooves matched with the ball plungers (83) are formed in the lower surface of the upper heat conducting plate (71).
  9. 9. The device for coupling the light source and the DMD chip of the automobile pixel headlight according to claim 8, wherein the locking module (4) comprises a fixed box (41), a plurality of mounting holes are formed in the fixed box (41), electromagnets (42) are fixedly mounted on the outer sides of the mounting holes, locking pins (43) are slidingly mounted in the mounting holes, and positioning grooves matched with the locking pins (43) are formed in the light source mounting seat (21) and the DMD mounting seat (31).
  10. 10. The device for coupling a light source of a car pixel headlight with a DMD chip according to claim 9, wherein the locking pin (43) comprises a positioning rod (431), a permanent magnet (432) is fixedly arranged at one end of the positioning rod (431) close to the electromagnet (42), and a return spring (433) is fixedly arranged between the positioning rod (431) and the electromagnet (42).

Description

Light source and DMD chip coupling device of automobile pixel headlight Technical Field The invention relates to the technical field of automobile illumination, in particular to a light source and DMD chip coupling device of an automobile pixel headlight. Background In the technical field of automobile illumination, a pixel headlight is used as novel intelligent lighting equipment, and by virtue of the advantages of high-definition shadow projection, intelligent dimming, self-adaptive road conditions and the like, the intelligent lighting equipment gradually becomes core configuration of a high-end automobile, can accurately control the irradiation range, intensity and shape of light rays according to the change of driving scenes and road conditions, effectively improves the night driving safety, and avoids glare interference on opposite vehicles and pedestrians. The core technology of the pixel headlight is that the light source is precisely coupled with the DMD chip, the DMD chip is used as a core component for light pixelation regulation, and stable, uniform and precisely positioned light emitted by the light source is required to be received to realize projection of high-definition light shadows, so that the coupling precision and stability of the light source and the DMD chip directly determine the lighting effect and the working reliability of the automobile pixel headlight. At present, the coupling device of the light source and the DMD chip of the traditional automobile pixel headlight has a plurality of technical defects in practical application, and severely restricts the performance exertion and popularization and application of the pixel headlight. In the aspect of light coupling precision, the light source light straightening structure of the traditional coupling device is unreasonable in design, light is subject to propagation path deviation after multiple reflection and refraction, an effective error compensation mechanism is lacked, assembly errors, vibration deviation and thermal expansion deviation cannot be compensated, the light cannot be precisely coupled to an effective photosensitive area of a DMD chip, problems of light shadow blurring, poor glare control and the like occur, and the lighting effect and the driving safety are affected. In the aspect of heat dissipation performance, a large amount of heat can be generated in the working process of a light source (especially an LED lamp bead) and a DMD chip, the heat dissipation structure of the traditional coupling device is simple in design, single heat dissipation fins are adopted for heat dissipation, the heat dissipation efficiency is low, the heat is easy to accumulate on the surface of a core component, the temperature of the component is increased, the aging of the component is accelerated, the service life is shortened, the luminous intensity of the light source is reduced, the response speed of the DMD chip is reduced, and the light coupling precision and the working stability of the device are further influenced. Disclosure of Invention 1. Technical problem to be solved Aiming at the problems existing in the prior art, the invention aims to provide a light source and DMD chip coupling device of an automobile pixel headlight, which realizes double alignment and convergence of light rays through a micro lens array, a convex ball lens and a converging lens of a light source module, precisely changes the propagation direction of the light rays through a reflecting mirror and a TIR prism, can finely adjust in multiple directions, compensates assembly, vibration and thermal expansion offset, filters vibration through damping effect by a heat transfer rod of a heat conducting seat, avoids offset caused by rigid transfer, ensures that the light rays are always and precisely coupled to the DMD chip, greatly improves coupling precision and stability, ensures high-definition light projection effect of the automobile pixel headlight, and avoids glare interference. 2. Technical proposal In order to solve the problems, the invention adopts the following technical scheme. The utility model provides a light source and DMD chip coupling device of car pixel headlight, includes the installation casing, the fixed mounting has the heat dissipation module in the installation casing inner bottom, heat dissipation module upper end fixed mounting has two sets of symmetrical distribution's driver, driver upper end fixed mounting has the heat conduction seat, two heat conduction seat upper end respectively fixed mounting has symmetrical distribution's light source module and DMD chip module, both ends all fixed mounting have locking module around the installation casing, locking module upper end fixed mounting has acceleration sensor. As a further improvement of the invention, the light source module comprises a light source mounting seat, an LED mounting groove is formed in the upper end of the light source mounting seat, a plurality of LED lamp beads