CN218348567U

CN218348567U - Car light imaging optical system suitable for mu LED light source

Info

Publication number: CN218348567U
Application number: CN202222495748.6U
Authority: CN
Inventors: 王刚; 宝庆云; 朱才华; 叶丛卓
Original assignee: Shanghai Jinghe Photoelectric Technology Co ltd
Current assignee: Shanghai Jinghe Photoelectric Technology Co ltd
Priority date: 2022-09-21
Filing date: 2022-09-21
Publication date: 2023-01-20
Anticipated expiration: 2032-09-21

Abstract

The utility model discloses a car light imaging optical system suitable for mu LED light source, its characterized in that includes mu LED light source, borosilicate glass lens, PMMA lens and GOB type glass lens in proper order, the optical focus of borosilicate glass lens, PMMA lens, GOB type glass lens with car light imaging optical system's mu LED light emitting area center coincidence. The utility model solves the problem of chromatic aberration caused by the light with different wavelengths passing through the same material by using three lenses made of materials with different refractive indexes; the mixed design of illumination and imaging solves the problems of light effect reduction and edge imaging blurring; the lens group can be adapted to most mu LED light sources, only the light sources need to be replaced when the lens group faces different pixel requirements, a special die is not needed to be matched with a special module, and the lens group has extremely high universality, so that the lamp cost is greatly reduced.

Description

Car light imaging optical system suitable for mu LED light source

Technical Field

The utility model relates to a car light imaging optical system suitable for mu LED light source belongs to the car light lighting technology field of automobile parts.

Background

The traditional multiple independent LEDs are used as light sources, and in a far-light matrix scheme matched with a silica gel inner lens and an acrylic outer lens, micron-sized gaps can not be formed between LED light emitting surfaces, so that matrix projection of a matrix light area can be realized only by using the silica gel inner lens as a collimator to secondarily distribute light, along with the fact that the outer side LED is more and more far away from a focus, images projected by the LEDs which are closer to the outer side are more fuzzy, clear matrix partition illumination is difficult to achieve, the problem that the gaps between the LED light emitting surfaces are large is thoroughly solved due to the appearance of a mu LED novel surface light source, micron-sized gaps between adjacent light emitting surfaces are achieved, but the problem generated is also obvious, the traditional non-imaging optical system cannot be matched with the mu LED novel surface light source, and the technical characteristic that the small light emitting surfaces in the whole mu LED light emitting surface are independently controllable cannot be perfectly presented.

Disclosure of Invention

The utility model aims to solve the technical problem that: an imaging optical system adaptable to a novel area light source of a mu LED is provided.

In order to solve the technical problem, the utility model provides a car light imaging optical system suitable for mu LED light source, its characterized in that includes mu LED light source, borosilicate glass lens, PMMA lens and GOB type glass lens in proper order, the optical focus of borosilicate glass lens, PMMA lens, GOB type glass lens with car light imaging optical system's mu LED light emitting area center coincidence.

Preferably, the high borosilicate glass lens has a refractive index of 1.474 and a diameter of 32.7mm; the refractive index of the PMMA lens is 1.492, and the diameter is 38mm; the GOB type glass lens has a refractive index of 1.523 and a diameter of 54.5mm.

The utility model provides a car Light imaging optics scheme (mu LED: micro Light Emitting Diode, the chinese name is little Emitting Diode) suitable for mu LED Light source, regard mu LED Light Emitting area center as the dominant focus, the Light Emitting area normal line at this focus place is as the optical axis of all lenses of whole set of optical system, on the optical axis adjacent dominant focus place different refracting index materials in proper order, different radius curvatures, the three lens of different diameters, simultaneously, the respective optical focus of three lens must coincide with mu LED Light Emitting area center respectively.

Compared with the traditional non-imaging matrix projection distance light optical system, the utility model solves the problem of chromatic aberration caused by the light with different wavelengths passing through the same material by using the lenses made of three materials with different refractive indexes; the mixed design of illumination and imaging solves the problems of light effect reduction and edge imaging blurring; the lens group can be adapted to most mu LED light sources, only the light sources need to be replaced when the lens group faces different pixel requirements, a special die is not needed to be matched with a special module, and the lens group has extremely high universality, so that the lamp cost is greatly reduced. The utility model discloses a big problem in clearance between the LED light emitting area has thoroughly been solved to mu LED light source, and the little light emitting area is independently controllable in whole light emitting area simultaneously, provides new technical basis for the matrix distance light.

Compared with the prior art, the beneficial effects of the utility model reside in that:

1. the light effect and the pixel sharpness are both considered;

2. not only the central region is clear in imaging, but also the definition of the matrix projection of the boundary is ensured;

3. color difference is effectively inhibited, and pixel edge coloring is avoided;

4. the optical system disclosed by the invention has extremely high universality.

Drawings

Fig. 1 is a schematic structural diagram of a car light imaging optical system provided by the present invention;

fig. 2 is a front view of the imaging optical system for a vehicle lamp provided by the present invention;

FIG. 3 isbase:Sub>A cross-sectional view taken along the line A-A in FIG. 2;

FIG. 4 is a schematic view of the present invention during installation;

FIG. 5 is a schematic diagram of the optical path of the car light imaging optical system during central imaging;

fig. 6 is a schematic diagram of the light path when the imaging optical system for car light images at the edge.

Detailed Description

In order to make the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Examples

As shown in fig. 1-3, for the utility model provides a pair of car light imaging optical system suitable for mu LED light source, it includes mu LED light source 1, borosilicate glass lens 2, PMMA lens 3 and GOB type glass lens 4 in proper order, the optical focus of borosilicate glass lens 2, PMMA lens 3, GOB type glass lens 4 with car light imaging optical system's dominant focus coincidence. The GOB type glass lens 4 in this example, i.e., the K51 type glass lens, was purchased from Fuxin glass of Zhejiang.

In this embodiment, the refractive index of the high borosilicate glass lens 2 is 1.474, and the diameter is 32.7mm; the refractive index of the PMMA lens 3 is 1.492, and the diameter is 38mm; the GOB type glass lens 4 has a refractive index of 1.523 and a diameter of 54.5mm.

When the vehicle lamp imaging optical system is installed, as shown in fig. 4, the mu LED light source 1 is fixed on the radiator 8, the GOB-type glass lens 4 is fixedly connected with the radiator 8 through the first support 5, the second support 6 is fixedly connected with the first support 5, the PMMA lens 3 is installed on the second support 6, the third support 7 is fixedly connected with the second support 6, and the high borosilicate glass lens 2 is installed on the third support 7. The incidence plane of the high borosilicate glass lens 2 is a plane, the other side of the high borosilicate glass lens is a convex surface, the incidence plane of the PMMA lens 3 is a convex surface, the other side of the high borosilicate glass lens is a plane, the incidence plane of the GOB type glass lens 4 is a plane, and the other side of the high borosilicate glass lens is a convex surface.

The optical path of the vehicle lamp imaging optical system in the center imaging is shown in fig. 5, and the optical path in the edge imaging is shown in fig. 6. Therefore, the mixed design of illumination and imaging solves the problems of light effect reduction and edge imaging blurring; the lens group can be adapted to most mu LED light sources, and only the light sources need to be replaced when different pixel requirements are met.

Claims

1. The utility model provides a car light imaging optical system suitable for mu LED light source which characterized in that includes mu LED light source (1), borosilicate glass lens (2), PMMA lens (3) and GOB type glass lens (4) in proper order, the optical focus of borosilicate glass lens (2), PMMA lens (3), GOB type glass lens (4) with car light imaging optical system's mu LED light emitting area center coincidence.

2. Automotive lamp imaging optical system suitable for a μ LED light source according to claim 1, characterized in that said borosilicate glass lens (2) has a refractive index of 1.474 and a diameter of 32.7mm; the refractive index of the PMMA lens (3) is 1.492, and the diameter is 38mm; the GOB type glass lens (4) has a refractive index of 1.523 and a diameter of 54.5mm.