CN213635296U

CN213635296U - Projection lamp using MLA

Info

Publication number: CN213635296U
Application number: CN202023320721.0U
Authority: CN
Inventors: 占爽
Original assignee: Suzhou Jingfang Photoelectric Technology Co ltd
Current assignee: Suzhou Jingfang Photoelectric Technology Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-07-06
Anticipated expiration: 2030-12-31

Abstract

The utility model relates to an use MLA's projection lamp, include: the light source, the collimating lens and the micro-lens array are sequentially arranged from front to back along a light path, the micro-lens array is provided with a plurality of light channels with display patterns, and image surface focuses of the light channels are overlapped. The utility model discloses introduce projection system with MLA (microlens array) technique, the light collimation that sends the LED light source through the collimating mirror is the parallel light, and preceding through microlens array and integrated at the inside pattern light cover of microlens array to form different patterns on the image plane medium. Compared with the prior art the utility model has the advantages of simple structure, compactness, image plane projected area is big, and the pattern is even clear.

Description

Projection lamp using MLA

Technical Field

The utility model belongs to the technical field of the optical projection, in particular to use projection lamp of microlens array technique.

Background

A Micro Lens Array (MLA) is an array type multi-lens structure with a multi-channel structure produced by a semiconductor manufacturing technology, can be applied to the fields of projectors, greeting projection lamps, warning illumination/projection and the like, and can integrate images into a Micro optical lens to generate clear images with gorgeous colors.

Referring to fig. 1, the conventional advertisement or greeting projection lamp generally uses an optical projection principle, and uses a high-brightness light source to project the pattern content on the film to the ground or other planes through an optical system composed of plastic or glass lenses, so as to form an image display and advertisement effect with rich visual impact. But the disadvantages of complex structure, large equipment volume, large power consumption of light source, high temperature, short service life and easy influence of dust on the whole equipment; in addition, the projection angle is fixed, the projection pattern is small, the brightness is uneven, the projection distance is short, the light source is easy to directly irradiate human eyes, risks are easy to cause, and the light source is also a pain point in use.

SUMMERY OF THE UTILITY MODEL

In order to solve the above technical problem, the present invention provides a projection lamp with compact structure and long projection distance.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme: a projection lamp using MLA, comprising: the light source, the collimating lens and the micro-lens array are sequentially arranged from front to back along the light path, the micro-lens array is provided with a plurality of light channels with display patterns, and images formed by the light channels are overlapped with one another.

In a further aspect, each of the light channels includes a transparent substrate, a patterned layer disposed on a front side of the transparent substrate, a first lens disposed on a rear side of the patterned layer, and a second lens disposed on a rear side of the transparent substrate.

Optionally, the first lens, the transparent substrate, the pattern forming layer, and the second lens are integrally formed.

Optionally, the pattern forming layer includes a mask and a plurality of light holes opened on the mask.

Optionally, the light source is one of an LED light source, a halogen lamp, an ultra-high pressure mercury lamp, a xenon lamp, and an incandescent lamp.

The utility model discloses a introduce projection system with MLA (microlens array) technique, the light collimation that sends the LED light source through the collimating mirror is the parallel light, then through microlens array and integrated at the inside pattern light cover of microlens array to form different patterns on image plane medium.

Compared with the prior art the utility model has the advantages of simple structure, compactness, image plane projected area is big, and the pattern is even clear.

Drawings

FIG. 1 is a schematic diagram of a conventional projection lamp;

FIG. 2 is a schematic view of an optical system of the projection lamp of the present invention;

FIG. 3 is a front view of a microlens array;

FIG. 4 is a bottom view of a microlens array;

wherein: 10. a light source; 11. a converging lens; 12. a color wheel; 13. trimming the lens; 14. a digital micro-mirror; 15. a DLP circuit; 16. a projection lens; 17. a projection screen; 2. a light source; 21. a collimating mirror; 22. a microlens array; 23. a first lens; 24. a pattern forming layer; 25. a transparent substrate; 26. a second lens.

Detailed Description

To explain the technical content, structural features, achieved objects and functions of the present invention in detail, the following detailed description is made with reference to the accompanying drawings.

This patent is directed to protecting a projection lamp employing MLA technology having a housing and an optical system disposed within the housing. Fig. 2 is a schematic structural diagram of an optical system of a projection lamp, and it can be seen from the diagram that the optical system of the projection lamp is composed of a light source 2, a collimating mirror 21 and a micro-lens array 22, and the optical system has a compact structure, few constituent components, easy assembly of the product and a small volume. The light source 2, the collimator lens 21, and the microlens array 22 are arranged in this order from front to back along the optical path. The microlens array 22 has a plurality of light channels with a display pattern, and images of the plurality of light channels are substantially coincident.

The light source 2 is one of an LED light source, a halogen lamp, an ultra-high pressure mercury lamp, a xenon lamp and an incandescent lamp. The light emitted from the light source 2 is collimated into parallel light by the collimator lens 21, and then passes through the microlens array 22 and the pattern forming layer 24 integrated inside the microlens array 22, thereby forming different patterns on the image plane medium. Since the optical channels can be clearly imaged on the image plane and a plurality of images are superposed with each other, light beams passing through the micro lens array can be superposed on the image plane medium, thereby improving the display definition and the brightness.

Referring to fig. 3 and 4, in one embodiment, each of the light channels includes a transparent substrate 25, a patterned layer 24 disposed on a front side of the transparent substrate 25, a first lens 23 disposed on a front side of the patterned layer 24, and a second lens 26 disposed on a rear side of the transparent substrate 25. Optionally, the transparent substrate 25 is a flat mirror structure as a support, and the material may be made of glass or polymer material. The first lens and the second lens are used for finishing the function of beam shaping and are made of high polymer materials; the pattern forming layer 24 serves as an input pattern, controlling the pattern on the final image plane.

In another embodiment of the present invention, the first lens 23, the transparent substrate 25, the pattern forming layer 24, and the second lens 26 are integrally formed by a wafer level lens manufacturing technique. The first lens 23 and the second lens 26 are respectively molded on the transparent substrate 25 by using a polymer material.

In this embodiment, the pattern forming layer 24 includes a mask and a plurality of light holes 27 formed on the mask, and the light holes 27 form pattern content, and when light passes through the microlens array, the light is projected on the focal plane with the same pattern content as the light holes 27.

The utility model discloses an introduce the projection lamp with the microlens array, replace original pattern film and plastic lens for the light source is more hidden, increases the projection distance.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration only, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims, specification and equivalents thereof.

Claims

1. A projection lamp using MLA, comprising: the light source (2), the collimating mirror (21) and the micro-lens array (22) are sequentially arranged from front to back along a light path, the micro-lens array (22) is provided with a plurality of light channels with display patterns, and images formed by the light channels are overlapped with one another.

2. The MLA projection lamp as set forth in claim 1, wherein: each light channel comprises a transparent substrate (25), a pattern forming layer (24) arranged on the front side of the transparent substrate (25), a first lens (23) positioned on the front side of the pattern forming layer (24) and a second lens (26) arranged on the rear side of the transparent substrate (25).

3. The MLA projection lamp as set forth in claim 2, wherein: the first lens (23), the transparent substrate (25), the pattern forming layer (24) and the second lens (26) are integrally formed.

4. The MLA projection lamp as set forth in claim 2, wherein: the pattern forming layer (24) comprises a photomask and a plurality of light holes (27) arranged on the photomask.

5. The MLA projection lamp as set forth in claim 1, wherein: the light source (2) is one of an LED light source, a halogen lamp, an ultrahigh pressure mercury lamp, a xenon lamp and an incandescent lamp.