CN201145172Y - Light-emitting diode projection lamp - Google Patents

Abstract

The utility model relates to a light emitting diode projection lamp, which is characterized in that an optical main shaft is defined on the projection path, and a lamp bracket, an LED lamp source, a light mixing mirror and a lens are arranged in sequence along the optical main shaft; the LED lamp source is arranged on the lamp holder and provided with a plurality of LED chips which are symmetrically distributed on the optical main shaft and can respectively emit light rays with different wavelengths; the light mixing mirror is provided with a structural surface facing the lens, the structural surface is provided with a plurality of parallel and side-by-side strip-shaped convex parts, and light rays emitted by the LED chip are scattered at the position for at least one time and then penetrate through the lens to be emitted to the outside, so that the light rays with different wavelengths are subjected to optical interference and can be fully mixed, and the purpose of uniformly mixing the light rays is achieved.

Description

LED Projector Light

technical field

The utility model is related to a projection lamp, and more specifically refers to a light-emitting diode projection lamp with uniform light mixing effect.

Background technique

White light emitting diode (Light Emitting Diode, LED) light source is widely used in the lighting market because of its advantages of energy saving, environmental protection and long service life.

Please refer to the known white light emitting diode projection lamp 1 shown in Fig. 1, which includes a lamp frame 2, an LED light source 3 arranged at the inside bottom of the lamp frame 2 (red, green and blue three colors arranged in a straight line) composed of LED chips) and a convex lens 4 located on one side of the lamp holder 2; when the light-emitting diode projection lamp 1 actually operates, the LED chips of different colors in the LED light source 3 are driven by voltage to emit light, and these light rays mix with each other at the intersection part to generate white light, and the white light is concentrated by the convex lens 4 to increase its brightness.

However, it should be noted that not all of the light emitted by the LED chips of the above-mentioned LED light source 3 with different colors has been mixed, that is, it has been directly emitted to the outside, resulting in the appearance of unmixed light around the external projection area. Therefore, the white light-emitting diode projection lamp 1 of this multi-color chip combination form still has its inconvenience in use.

Utility model content

The main purpose of this utility model is to provide a light-emitting diode projection lamp. Through the design of the optical structure, the light emitted by the LED chips of different colors in the LED light source can be emitted after uniform light mixing, so as to improve the surrounding area of the projection area. halo phenomenon.

In order to achieve the above-mentioned main purpose, an LED projection lamp provided by the present invention defines an optical axis on the projection path. The LED projection lamp includes: a lamp holder with a first A carrying portion and a second carrying portion; an LED light source, combined on the first carrying portion of the lamp holder, and having a plurality of LED chips symmetrically distributed on the optical axis, and these LED chips can be carried toward the second carrying portion The direction of the part emits light of different wavelengths; a lens is combined on the second bearing part of the lamp holder, and the optical axis passes through the center of the lens; and a light mixing mirror is located on the optical axis and is located on the LED Between the light source and the lens, the light mixing mirror has a structural surface facing the lens, and the structural surface has a plurality of parallel and side-by-side elongated protrusions for the light emitted by each LED chip to generate at least After one scattering, it exits towards the lens and passes through the lens to the outside.

According to an embodiment of the present invention, the LED light source has three LED chips emitting red, green, and blue light respectively, and the three LED chips are located on the same plane and arranged around the optical axis.

According to the embodiment of the present utility model, the luminous intensity of the three LED chips is the same.

According to an embodiment of the present invention, the light emitted by the three LED chips forms a single white light beam on the optical axis after passing through the light mixing mirror and the lens.

According to an embodiment of the present invention, the surface of each elongated protrusion is arc-shaped.

According to an embodiment of the present utility model, the lens is a condenser lens.

The positive effect of the utility model is that the utility model is arranged between the lens and the LED light source and has a light mixing mirror with a special optical structure, so that the light of different wavelengths passing through the surface of the structure can be uniformly mixed, and then Then pass through the lens to emit to the outside, so as to improve the light uniformity and brightness of the projected area at the same time, and improve the halo phenomenon.

Description of drawings

FIG. 1 is a schematic cross-sectional view of the structure of a known white light emitting diode projection lamp.

Fig. 2 is a three-dimensional exploded view of a LED projection lamp according to a preferred embodiment of the present invention.

FIG. 3 is a schematic cross-sectional view of the structure of the LED projection lamp of the above-mentioned embodiment.

Fig. 4 is a sectional view taken along line 4-4 of Fig. 3 .

Description of main component symbols:

100 LED Projector Lights

10 Lamp Holder 11 First Bearing Part 12 Second Bearing Part

20 LED light sources

21, 22, 23 LED chips

30 Lens 31 Flat Surface 32 Curved Surface

40 light mixing mirror 41 structured surface 42 structured surface

421 Convex

L Optical spindle

S Accommodating space

The representative figure of the designated summary of this case is: Figure 2.

Detailed ways

The preferred embodiments of the present utility model are listed below, and are described in detail in conjunction with the following drawings, wherein:

Please refer to FIG. 2 to FIG. 3 , which are LED projection lamps 100 of a preferred embodiment of the present invention. The projection lamp 100 defines an optical axis L on its projection path, and the projection lamps 100 are sequentially along the optical axis L. There is a light stand 10, an LED light source 20, a light mixing mirror 40 and a lens 30, wherein:

The lamp holder 10 is a cover body, which has a first bearing part 11 formed on the inner bottom of the lamp holder 10, a second bearing part 12 located at the opening of the lamp holder 10, and a second bearing part 12 located at the first bearing part. The accommodating space S between the part 11 and the second bearing part 12;

The LED light source 20 is combined on the first bearing portion 11 of the lamp holder 10, and is electrically connected to a power source (not shown in the figure); please refer to FIG. 4, in this embodiment, the LED light source 20 is composed of three LED chips 21, 22, and 23 that can respectively emit light of different wavelengths toward the direction of the second bearing portion 12. These light rays of different wavelengths are red light, green light and blue light respectively. White light can be obtained after light mixing; it should be noted that the three LED chips 21, 22, 23 in this embodiment are located on the same plane (that is, the first bearing part 11), and are arranged around the optical axis L as the center , and the luminous intensity is the same; thus, the light mixing area can be increased, and the white light chromaticity obtained after light mixing is better;

The lens 30, as shown in Figures 2 and 3, is a condenser lens in this embodiment, which is combined with the second carrying portion 12 of the lamp holder 10 to close the accommodating space S of the lamp holder 10; wherein , the side of the lens 30 facing the accommodating space S is a flat surface 31, and the opposite side is a curved surface 32, whereby the passing light can be concentrated to increase the brightness;

The light mixing mirror 40 can be combined with the lamp holder 10 in various ways and located in the accommodating space S, such as using other methods such as screw fixing, but because its combination method is not the key point of the present utility model, it will not be discussed here. I will go into details, so only its relative position is shown schematically in FIGS. Between them, it has a flat surface 41 facing the LED light source 20 and a structural surface 42 facing the lens 30. The structural surface 42 is integrally formed or stacked with a plurality of parallel parallel elongated convex parts 421, And the surface of each of the convex portions 421 in this embodiment is curved, so that the light rays passing through the light mixing mirror 40 can be optically interfered, so that the light rays of different wavelengths are scattered toward the lens 30 after being scattered several times, and It can fully mix the light and greatly reduce the light that is not mixed to the outside.

The above is the description of the various components and their relative positions of the light-emitting diode projection lamp 100 of the present invention. In actual application, the LED chips 21, 22, and 23 of different colors located on the same plane and arranged around the optical axis L receive the electric power The sources are driven to emit light respectively, thus, the light mixing area of these light rays is larger than that of the known LED chips arranged in a straight line; moreover, when these light rays pass through the light mixing mirror 40, they are received by the convex portion 421 of the structure surface 42 Optical interference can achieve sufficient staggered mixed light, and then emit in the direction of the lens 30 to obtain uniform mixed light, so as to greatly reduce the output of unmixed light, thereby improving the halo phenomenon around the projection area, and the Some of the light is emitted to the outside after passing through the lens 30; in other words, the projection lamp 100 of this embodiment can project a single white light beam located on the optical axis L, so that the light uniformity and brightness of the projected area are both Improvement can be obtained, and the known halo phenomenon can be improved, so it is practical.

The above descriptions are only preferred feasible embodiments of the present utility model, so all equivalent structural changes made by applying the specification of the present utility model and the scope of the patent application should be included in the scope of the patent of the present utility model.

Claims (6)

1. a light emitting diode projecting lamp is characterized in that, is that definition has an optical main axis on projected path, and this light emitting diode projecting lamp comprises:

One lamp bracket has one first supporting part and one second supporting part that are provided with along this optical main axis;

One LED lamp source is incorporated on this first supporting part of this lamp bracket, and has this optical main axis distribution of most led chip symmetries, and those led chips send the light of different wave length respectively towards the direction of this second supporting part;

One lens are incorporated on this second supporting part of this lamp bracket, and this optical main axis is by this lens centre; And

One mixed light mirror, be positioned on this optical main axis, and between this LED lamp source and this lens, this mixed light mirror has a body structure surface and faces this lens, this body structure surface has most parallel strip protuberances side by side, is towards this lens direction outgoing and pass these lens and be incident upon the outside after in this place primary scattering taking place at least for light that respectively this led chip sent.

2. light emitting diode projecting lamp as claimed in claim 1 is characterized in that, this LED lamp source has three led chips that send red, green, blue coloured light line respectively, and these three led chips are positioned at the isoplanar, and is that center ring is around arrangement with this optical main axis.

3. light emitting diode projecting lamp as claimed in claim 2 is characterized in that the luminous intensity of these three led chips is identical.

4. light emitting diode projecting lamp as claimed in claim 3 is characterized in that, these three light that led chip sent form a single white light beam that is positioned on this optical main axis after passing this mixed light mirror and this lens.

5. light emitting diode projecting lamp as claimed in claim 4 is characterized in that respectively the surface of this strip protuberance is curved.

6. light emitting diode projecting lamp as claimed in claim 5 is characterized in that, these lens are condenser.

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