CN214672604U

CN214672604U - Light mixing structure of fluorescent powder-free multi-primary-color LED lamp

Info

Publication number: CN214672604U
Application number: CN202120208246.3U
Authority: CN
Inventors: 罗昕; 徐龙权; 郭醒; 王光绪; 熊新华; 付江; 李宁
Original assignee: Nanchang Guiji Semiconductor Technology Co ltd; Nanchang University
Current assignee: Jiangxi Yuming Intelligent Photoelectric Co ltd
Priority date: 2021-01-26
Filing date: 2021-01-26
Publication date: 2021-11-09
Anticipated expiration: 2031-01-26

Abstract

The utility model discloses a mixed light structure of no phosphor powder polybase color LED lamps and lanterns, this mixed light structure include that bottom plate, base plate, first mixed light unit, second mix the light unit. The first light mixing unit comprises a fluorescent powder-free multi-primary color LED lamp bead, and the fluorescent powder-free multi-primary color LED lamp bead comprises four LED chips with different main wavelengths. The second light mixing unit is composed of the first light mixing units distributed in a quadrilateral way, and a complementary color unit containing four LED chips with different main wavelengths is arranged in the second light mixing unit. The utility model discloses in can eliminating no phosphor powder many primary colors LED lamps and lanterns, different monochromatic light is respectively in the not equidirectional enrichment and the lamps and lanterns subregion more obvious mixed light colour cast phenomenon that leads to, improves the photochromic homogeneity of light-emitting.

Description

Light mixing structure of fluorescent powder-free multi-primary-color LED lamp

Technical Field

The utility model relates to a semiconductor lighting technology especially relates to an improve mixed light structure of the photochromic homogeneity of many primary colors LED lamps and lanterns of no phosphor powder.

Background

According to the semiconductor lighting research plan of the U.S. energy agency, the limit value of the efficiency of synthesizing white light by the fluorescent powder-free multi-primary color LED is 330lm/W, which is greater than the limit value of the white light lighting efficiency excited by the fluorescent powder, which is 250lm/W, so that the eye of the research institutions at home and abroad is more and more focused on the research and development of the fluorescent powder-free multi-primary color LED lighting field, and the fluorescent powder-free multi-primary color LED white light lighting is the development trend of the next generation of semiconductor lighting technology. However, when the LED chips with multiple dominant wavelengths are packaged into the all-in-one phosphor-free multi-primary-color LED lamp bead, due to the difference in spatial layout of the different dominant wavelength chips in the phosphor-free multi-primary-color LED lamp bead, the light type of the monochromatic light may shift toward the direction of the position of the LED chip itself. Finally, light with different colors is enriched in different directions in the lamp, and a mixed light color cast phenomenon occurs on the lamp mask, the panel or the edge position of the lamp. If there is not many primary colors LED lamp pearl of phosphor powder and add big visual angle lens, the eccentric phenomenon of light type is more obvious, and can be towards the opposite direction skew of LED chip self position, and mixed light colour cast phenomenon is more serious.

Chinese patent No. CN102280443B, publication date 2016, 10, and 05, which discloses a multi-primary color combined COB and a method for manufacturing the same, wherein a light emitting region is divided on a substrate, and LED chips are welded on the light emitting region, and the LED lamp bead is composed of at least three colors of LED chips; the LED chips with different colors form a light mixing unit, the light mixing units are uniformly distributed in the light emitting area, first light mixing is carried out on the light mixing units, the LED chips with multiple colors are mixed to obtain needed colors, then light emitted by each light mixing unit is uniformly mixed, and uniform light emitting of monochromatic light in the whole light emitting surface is ensured. However, in the light source layout of the method, the relative positions of the single-color LED chips in the LED lamp bead are consistent, and the phenomenon of single-color light enrichment in a certain direction still exists, so that the phenomenon of regional mixed light color cast caused by the adoption of the multi-in-one fluorescent powder-free multi-primary-color pure LED cannot be eliminated.

Disclosure of Invention

An object of the utility model is to provide a can improve mixed light structure of photochromic homogeneity of light-emitting, this mixed light structure is through rearranging LED chip and lamp pearl, has solved the photochromic inhomogeneous problem on no phosphor powder many primary colors LED lamps and lanterns face guard or the panel.

The purpose of the utility model is realized like this:

the utility model provides a mixed light structure of no phosphor powder polybase color LED lamps and lanterns which the characteristic is: the LED light source comprises a bottom plate, a substrate, a first light mixing unit and a second light mixing unit, wherein the first light mixing unit comprises a plurality of fluorescent powder-free multi-primary-color LED lamp beads, and each fluorescent powder-free multi-primary-color LED lamp bead comprises four LED chips with different main wavelengths; the first light mixing units are arranged on the substrate, and the substrate is uniformly distributed on the bottom plate; the second light mixing unit is composed of four first light mixing units arranged in a quadrilateral shape and comprises a complementary color unit.

Furthermore, four adjacent first light mixing units forming the second light mixing unit are arranged in a square, rectangular or parallelogram shape, so that a color complementing unit can be formed in the second light mixing unit to improve the space color uniformity of the lamp.

Further, the complementary color unit in the second light mixing unit is composed of LED chips with different dominant wavelengths in adjacent first light mixing units in the second light mixing unit, and the first light mixing units have different LED chip arrangement modes, so that the complementary color unit includes a plurality of monochromatic LED chips with four different dominant wavelengths from different first light mixing units.

Compared with the prior art, the utility model provides an above technical scheme, the advantage is:

the LED chips with different dominant wavelengths are pre-mixed in the first light mixing unit, after the first light mixing unit pre-mixes light, the monochromatic LED chips have different relative positions in two adjacent first light mixing units in the second light mixing unit, so that the color complementing unit formed by the monochromatic LED chips comprises four LED chips with different dominant wavelengths, light emitted by the first light mixing unit can further complement and mix light in a space, the enrichment phenomenon of the monochromatic light of the fluorescent powder-free multi-primary color LED lamp beads in a certain direction in the space is eliminated, and the light color uniformity of the fluorescent powder-free multi-primary color LED lamp in the space is further improved.

Drawings

Fig. 1 is a schematic top view of a layout of a light mixing structure according to embodiment 1 of the present invention;

fig. 2 is an enlarged schematic view of a second light mixing unit according to embodiment 1 of the present invention;

fig. 3 is a schematic top view of a layout of a light mixing structure according to embodiment 2 of the present invention;

fig. 4 is an enlarged schematic view of a second light mixing unit according to embodiment 2 of the present invention.

Detailed Description

The technical solution in the embodiment of the present invention is further explained below with reference to the drawings in the embodiment of the present invention. In addition, the drawings of the utility model all adopt very simplified non-precise proportion, and are only used for convenient and clear auxiliary explanation of the utility model.

Example 1:

fig. 1 is a schematic top view of a layout of a light mixing structure in embodiment 1, in which a first light mixing unit 11 is disposed on a substrate 12, and the substrate 12 is uniformly disposed on a bottom plate 13 of a lamp. The four first light mixing units 11 at the upper left corner are combined into a second light mixing unit 14, so that the light source arrangement of the whole lamp can be seen, and the result is actually obtained by copying and translating the second light mixing unit 14.

Fig. 2 is an enlarged schematic view of the second light mixing unit 14 in embodiment 1, wherein the second light mixing unit 14 includes first

light mixing sub-units

141, 142, 143, and 144, respectively.

The first

light mixing sub-units

141, 142, 143, and 144 are the same light mixing unit, that is, the first light mixing unit 11 belonging to the same LED chip arrangement position.

The arrangement positions of the four different dominant wavelength LED chips in the first light-mixing subunit 141 are the same as that of the first light-mixing subunit 144.

The arrangement positions of the four different dominant wavelength LED chips in the first light mixing subunit 142 are the same as those of the first light mixing subunit 143.

The first light mixing subunit 142 is formed by rotating the first light mixing subunit 141 by 180 degrees, and the first light mixing subunit 144 is formed by rotating the first light mixing subunit 143 by 180 degrees.

The yellow chip (Y) and the green chip (G) in the first light mixing subunit 141, and the red chip (R) and the blue chip (B) in the first light mixing subunit 143 constitute a complementary color unit 145.

The red chip (R) and the green chip (G) in the first light mixing subunit 141, and the yellow chip (Y) and the blue chip (B) in the first light mixing subunit 142 form a complementary color unit 146.

Since the lights of the four LED chips with different dominant wavelengths in the

complementary color units

145 and 146 can be mixed into white light in space, the color cast phenomenon of mixed light caused by single color light enrichment in the same direction is eliminated.

Similarly, the first light mixing subunit 143 and the first light mixing subunit 144, and the first light mixing subunit 142 and the first light mixing subunit 144 in the second light mixing unit 14 also improve the color cast phenomenon of mixed light according to the same light mixing complementary color principle.

Example 2:

fig. 3 is a schematic top view of a layout of a light mixing structure in embodiment 2, and the difference between embodiment 2 and embodiment 1 is: in the second light mixing unit of embodiment 2, the LED chips of the first light mixing unit have different orientations and different manufacturing methods.

In fig. 3, the first light mixing unit 21 is placed on a substrate 22, and the substrate 22 is uniformly arranged on the lamp bottom plate 23; the four first light mixing units 21 are combined into the second light mixing unit 24, and it can be seen that the light source arrangement of the lamp is the result of the second light mixing unit 24 after being replicated and translated.

Fig. 4 is an enlarged schematic view of the second light mixing unit 24 according to embodiment 2, wherein the second light mixing unit 24 has four first

light mixing sub-units

241, 242, 243, and 244, respectively.

The four first

light mixing sub-units

241, 242, 243, and 244 belong to the light mixing unit arranged at two different LED chip positions, that is, the light mixing unit 21 arranged at two different LED chip positions.

The relative arrangement positions of the LED chips of four colors in the first light-mixing subunit 244 are the same as the relative arrangement position of the first light-mixing subunit 241, and the first light-mixing subunit 241 can form the first light-mixing subunit 244 after rotating 180 degrees along the center origin. The arrangement positions of the four color chips in the first light-mixing subunit 243 are the same as those of the first light-mixing subunit 242, and the first light-mixing subunit 242 can be formed by rotating 180 degrees along the center origin to form the first light-mixing subunit 243.

The first light mixing subunit 242 is formed by interchanging the positions of the first row of LED chips and the second row of LED chips in the first light mixing subunit 241, that is, the first light mixing subunit 242 and the first light mixing subunit 241 are the first light mixing units 21 arranged at two different LED chip positions respectively.

The yellow chip (Y) and the green chip (G) in the first light mixing subunit 241, and the blue chip (B) and the red chip (R) in the first light mixing subunit 243 also form a complementary color unit 245.

The red chip (R) and the green chip (G) in the first light mixing subunit 241, and the blue chip (B) and the yellow chip (Y) in the first light mixing subunit 242 constitute a complementary color unit 246.

Since the lights of the four LEDs with different dominant wavelengths in the

complementary color units

245 and 246 can be mixed into white light in space, the color shift phenomenon of mixed light caused by the enrichment of single color light in the same direction is eliminated.

Similarly, the first light mixing subunit 243 and the first light mixing subunit 244, and the first light mixing subunit 242 and the first light mixing subunit 244 in the second light mixing unit 24 also improve the color cast phenomenon of mixed light according to the same light mixing complementary color principle.

The above are merely two specific embodiments of the present invention, rather than all embodiments, and it is obvious that the present invention can also have many similar modifications, and for those skilled in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, including other light mixing structures formed by using the complementary color principle, all of which belong to the protection scope of the present invention.

Claims

1. The utility model provides a mixed light structure of no phosphor powder polybase color LED lamps and lanterns which characterized in that: the LED light mixing device comprises a bottom plate, a substrate, a first light mixing unit and a second light mixing unit, wherein the first light mixing unit comprises a fluorescent powder-free multi-primary-color lamp bead, and the fluorescent powder-free multi-primary-color lamp bead comprises four LED chips with different main wavelengths; the first light mixing units are arranged on the substrate, and the substrate is uniformly distributed on the bottom plate; the second light mixing unit is composed of four first light mixing units arranged in a quadrilateral shape, and a complementary color unit is arranged in the second light mixing unit.

2. The light mixing structure of the phosphor-free multi-primary color LED lamp according to claim 1, wherein: the four adjacent first light mixing units forming the second light mixing unit are arranged in a square, rectangular or parallelogram shape.

3. The light mixing structure of the phosphor-free multi-primary color LED lamp according to claim 1, wherein: the first light mixing unit has different chip arrangements, so that a complementary color unit is formed in the second light mixing unit.

4. The light mixing structure of the phosphor-free multi-primary color LED lamp according to claim 3, wherein: the complementary color unit in the second light mixing unit is composed of LED chips with different dominant wavelengths from the adjacent first light mixing unit in the second light mixing unit and comprises a plurality of LED chips with four different dominant wavelengths in the second light mixing unit.