CN217559726U - Lighting device based on lens array - Google Patents

Abstract

The utility model belongs to the technical field of the illumination, a lighting device based on lens array is disclosed, include: the LED chip comprises a light source, a chip LED and a light source, wherein the light source comprises a plurality of chip LEDs which are arranged in an array; the micro lens group is provided with micro lens units which correspond to the patch type LEDs one by one and used for projecting and transmitting light rays emitted by the patch type LEDs; and the projection lens is used for projecting and transmitting the light rays passing through the micro lens group. The utility model discloses a lighting device, the light source form of arranging is nimble, can select the mode of arranging as required to projection facula border is clear, does not have crosstalk, overlap between the adjacent facula.

Description

Lighting device based on lens array

Technical Field

The utility model relates to the field of lighting technology, particularly, relate to a lighting device based on lens array.

Background

In an illumination device (such as an automobile headlamp) using a micro lens array technology to realize illumination and projection, besides meeting basic illumination requirements, various projections are provided, so that richer functions such as displaying of warning patterns and the like are realized. Although the purpose of accurately controlling the illumination area is completely realized through the pixelation control, the existing car lamps applied to the market have the problems of illumination dark areas, low definition, insufficient illumination and the like, meanwhile, due to the process problems in the process of packaging and manufacturing the LED chips, a certain gap exists between the pixels, the gap of the traditional projection lens can be projected to the ground together, so that the light spots have dark areas, therefore, when the car is driven, flaws can occur in the illumination area, the driving is influenced, and potential safety hazards exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a lighting device based on lens array, it adopts SMD LED as the light source, can arrange in a flexible way and satisfy diversified pattern demand, and projection facula boundary is clear simultaneously, and there is not crosstalk, overlap between the adjacent facula.

The utility model discloses a following technical scheme realizes:

a lens array based illumination device comprising:

the LED chip comprises a light source and a plurality of LED chips, wherein the light source comprises a plurality of surface mount type LEDs which are arranged in an array;

the micro lens group is provided with micro lens units which correspond to the patch type LEDs one by one and used for projecting and transmitting light rays emitted by the patch type LEDs;

and the projection lens is used for projecting and transmitting the light rays passing through the micro lens group.

Alternatively,

the curvature of the micro lens unit corresponding to the luminous patch type LED position in the micro lens group is larger than that of the micro lens unit corresponding to the non-luminous patch type LED position.

Or,

the patch type LED in the light source and the micro lens unit in the micro lens set are arranged in a matrix mode.

Alternatively,

the microlens group includes a first microlens and a second microlens arranged in a light transmission direction, and the curvature of a microlens unit of the first microlens and the curvature of a microlens unit of the second microlens are different.

Alternatively,

both sides of the micro lens unit of the micro lens group are convex structures.

Or,

the patch type LEDs are arranged according to a one-dimensional array, a two-dimensional array, a rectangular array or a circular array.

Or,

the projection lens comprises a first projection lens and a second projection lens which are arranged along the light transmission direction, and the curvatures of the first projection lens and the second projection lens are different.

Or,

and a shading grating is also arranged between the first micro lens and the second micro lens.

Alternatively,

the light incident side of the projection lens is a concave surface, and the light emergent side of the projection lens is a convex surface;

or the light inlet side and the light outlet side of the projection lens are convex surfaces.

The technical scheme of the utility model following beneficial effect has at least:

the lighting device of the utility model adopts the surface mount type LED to form the LED array, each LED light source in the LED array corresponds to each micro lens unit in the micro lens group one by one, thereby avoiding the crosstalk between adjacent pixel points and accurately controlling light spots through a single pixel;

through the combination of the micro-lens group and the projection lens, the occurrence of dark gaps of light spots caused by LED packaging is avoided, the uniform distribution of the projection light spots of the LED projection array can be realized by accurately controlling the on and off of the LED lamp, the boundary of each light spot is clear, the light emitted between the adjacent LEDs cannot be mutually crosstalked, and no obvious dark gap occurs.

Drawings

Fig. 1 is a schematic view of the light path structure of the lighting device of the present invention;

fig. 2 is a diagram of the arrangement of the surface mount LEDs of the light source of the present invention, wherein (a) is a one-dimensional array, (b) is a two-dimensional array, (c) is a circular array, and (d) is a rectangular array.

Icon: the method comprises the following steps of 1-a light source, 101-a patch type LED, 2-a first micro lens, 3-a second micro lens, 4-a first projection lens, 5-a second projection lens, 6-a projection objective object plane and 7-a projection objective image plane.

Detailed Description

Referring to fig. 1, fig. 2, the utility model discloses a lighting device based on lens array, including light source 1, microlens group and projection lens, wherein, light source 1 includes the SMD LED101 that a plurality of array was arranged, in this embodiment, SMD LED101 can adopt the physics mode of arranging of one-dimensional array, two-dimensional array, rectangular array or circular array, of course, also can adopt on the mode basis that rectangular array arranged, the mode through on-off control lets the LED that corresponds different array modes light and the mode that other LEDs closed, also can obtain various array modes. Therefore, the light sources 1 of the present embodiment can be flexibly arranged according to specific requirements to obtain different light sources 1.

The micro lens group is provided with micro lens units which are in one-to-one correspondence with the patch type LEDs 101 and used for projecting and transmitting light rays emitted by the patch type LEDs 101. In the present embodiment, the microlens set includes the first microlens 2 and the second microlens 3 arranged along the light transmission direction, the curvatures of the microlens unit of the first microlens 2 and the microlens unit of the second microlens 3 are different, and the number of the microlens set is not limited to two groups of microlenses, but may be two or more groups. In this embodiment, the first microlenses 2 and the second microlenses 3 both adopt a rectangular array microlens unit arrangement form, and in order to match with the patch LED101 of the light source 1, only the curvature of the microlens unit of the corresponding unit needs to be adjusted, for example, the light source 1 adopts a linear array, only the curvature of the microlens unit corresponding to the linear array needs to be adjusted to be larger than the curvatures of the microlens units at other positions, and the microlens set can maintain the rectangular array.

In this embodiment, each microlens unit includes two surfaces, wherein the two surfaces are convex structures.

The projection lens is used for projecting and transmitting the light passing through the micro lens group, in this embodiment, the projection lens includes a first projection lens 4 and a second projection lens 5 arranged along the light transmission direction, the curvatures of the first projection lens 4 and the second projection lens 5 are different, and of course, the number of the projection lenses is not limited to two, and may be more than two. In this embodiment, the light incident side of the first projection lens 4 and the second projection lens 5 is a concave surface, and the light emitting side is a convex surface, or both the light incident side and the light emitting side of the first projection lens 4 and the second projection lens 5 are convex surfaces.

In order to ensure that the light emitted from the light source 1 is refracted by the first and second microlenses 2, 3 and then propagates in the space, and to avoid crosstalk, a light shielding grid made of a highly absorptive material may be added between the first and second microlenses 2, 3, wherein each small grid of the light shielding grid is square or rectangular.

The light source 1 of the embodiment is installed by fixing the patch type LED101 on the substrate, light emitted by the LED is refracted to the projection objective object plane 6 through the first micro lens 2 and the second micro lens 3, and then the light is refracted and imaged through the first projection lens 4 and the second projection lens 5 and is uniformly distributed on the image plane on the projection objective image plane 7.

The utility model discloses a lighting device adopts SMD LED101 to form the LED array, and each microlens unit one-to-one in each LED light source 1 in the LED array and the microlens group avoids crosstalking between the adjacent pixel and through single pixel accurate control facula, owing to do not adopt the highly integrated LED commonly used among the prior art, and constitute the array of high degree of freedom with the help of the single LED light source 1 of no several, and is higher to the fitness of different scene demands.

Through the combination of the micro-lens group and the projection lens, the occurrence of dark gaps of light spots caused by LED packaging is avoided, the uniform distribution of the projection light spots of the LED projection array can be realized by accurately controlling the on and off of the LED lamp, the boundary of each light spot is clear, the light emitted between the adjacent LEDs cannot be mutually crosstalked, and no obvious dark gap occurs.

Claims (9)

1. A lens array based illumination device, comprising:

the LED chip comprises a light source, a chip LED and a light source, wherein the light source comprises a plurality of chip LEDs which are arranged in an array;

the micro lens group is provided with micro lens units which correspond to the patch type LEDs one by one and used for projecting and transmitting light rays emitted by the patch type LEDs;

and the projection lens is used for projecting and transmitting the light rays passing through the micro lens group.

2. The lens array based illumination device of claim 1,

the curvature of the micro lens unit corresponding to the luminous patch type LED position in the micro lens group is larger than that of the micro lens unit corresponding to the non-luminous patch type LED position.

3. The lens array based illumination device of claim 1,

the patch type LED in the light source and the micro lens unit in the micro lens group are arranged in a matrix mode.

4. The lens array based illumination device of claim 1,

the microlens group includes a first microlens and a second microlens arranged in a light transmission direction, and the curvature of a microlens unit of the first microlens and the curvature of a microlens unit of the second microlens are different.

5. The lens array based illumination device of claim 1,

both sides of the micro lens unit of the micro lens group are convex structures.

6. The lens array based illumination device of claim 1,

the patch type LEDs are arranged according to a one-dimensional array, a two-dimensional array, a rectangular array or a circular array.

7. The lens array based illumination device of claim 1,

the projection lens comprises a first projection lens and a second projection lens which are arranged along the light transmission direction, and the curvatures of the first projection lens and the second projection lens are different.

8. The lens array based illumination device of claim 4,

and a shading grating is also arranged between the first micro lens and the second micro lens.

9. The lens array based illumination device of claim 1,

the light incident side of the projection lens is a concave surface, and the light emergent side of the projection lens is a convex surface;

or the light-in side and the light-out side of the projection lens are convex.

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