CN112185942A

CN112185942A - LED light-emitting device, LED lamp and LED display screen

Info

Publication number: CN112185942A
Application number: CN201910585655.2A
Authority: CN
Inventors: 李闪; 陈鸣; 何孝亮; 傅姝炀
Original assignee: Shanghai Sansi Technology Co Ltd; Shanghai Sansi Electronic Engineering Co Ltd; Jiashan Sansi Photoelectric Technology Co Ltd; Pujiang Sansi Optoelectronics Technology Co Ltd
Current assignee: Shanghai Sansi Technology Co Ltd; Shanghai Sansi Electronic Engineering Co Ltd; Jiashan Sansi Photoelectric Technology Co Ltd; Pujiang Sansi Optoelectronics Technology Co Ltd
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2021-01-05

Abstract

In the LED light-emitting device, LED lamp, and LED display screen of the present application, the LED light-emitting device includes: a plurality of LED light-emitting units mounted on a heat sink; wherein, the plurality of LED light-emitting units are encapsulated with at least one phosphor. That is to say, by using each LED light-emitting unit to encapsulate the same phosphor powder or encapsulate a variety of phosphor powders, it is possible to easily control the light output color and even the mixed light color of multiple LED light-emitting units, thereby solving the problems in the prior art.

Description

LED light-emitting device, LED lamp and LED display screen

Technical Field

The application relates to the technical field of LEDs, in particular to an LED light-emitting device, an LED lamp and an LED display screen.

Background

In the lighting scheme of the multi-LED light-emitting chip, how to perform light distribution to obtain required mixed light is a technical problem in design.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, the present application aims to provide an LED lighting device, an LED lamp, and an LED display screen, which solve the problems in the prior art.

To achieve the above and other related objects, the present application provides an LED lighting device including: a plurality of LED light emitting units mounted on the heat sink; wherein, the LED light-emitting units are packaged with at least one fluorescent powder.

In one or more embodiments of the present application, the heat sink is made of ceramic.

In one or more embodiments of the present application, the light emitted from the plurality of LED lighting units is mixed into a mixed light output of a predetermined color.

In one or more embodiments of the present application, the plurality of LED lighting units comprises: one or more first light emitting units; each of the first light emitting units includes: the LED packaging structure comprises a first LED light-emitting wafer and a first optical packaging component which is packaged outside the first LED light-emitting wafer and provided with first fluorescent powder; wherein, the first fluorescent powder is irradiated and excited by the first LED luminous wafer to output: and the light emitting with the color determined by the color of the first fluorescent powder and the light emitting color of the first LED light emitting wafer.

In one or more embodiments of the present application, the plurality of LED lighting units further comprises: one or more second light emitting units; each of the second light emitting units includes: the second LED light-emitting chip and a second optical packaging component packaged outside the second LED light-emitting chip; wherein, the light emitted from the one or more second light emitting units is used for participating in the mixed light so as to set the color rendering index and/or the color temperature of the mixed light.

In one or more embodiments of the present application, there are a plurality of the first light-emitting units, the colors of the light emitted from the first LED light-emitting chips are the same or different, and the color temperature of the light emitted from each of the first light-emitting units is different due to different components of the first phosphor.

In one or more embodiments of the present application, there are a plurality of the first light emitting units, the colors of the light emitted from the first LED light emitting chips are the same, and the components of the first phosphor are the same, so that the color temperatures of the light emitted from the first LED light emitting chips are the same.

In one or more embodiments of the present application, the first phosphor includes: and the fluorescent powder is used for being matched with the light emitting color of the first LED light-emitting wafer to form a plurality of primary colors of white light.

In one or more embodiments of the present application, each LED lighting unit includes: and the at least two second light-emitting units are respectively used for setting the color rendering index and the color temperature of the mixed light.

In one or more embodiments of the present application, the second optical package component includes a transparent phosphor or no phosphor therein.

In one or more embodiments of the present application, the plurality of LED lighting units comprises: a plurality of third light emitting units; the light emitting colors of the third light emitting units are matched with each other to form mixed light with a preset color.

In one or more embodiments of the present application, the color of the light emitted by each third light emitting unit is white light, and the types of the light emitted by each third light emitting unit and the color of the light emitted by each third light emitting unit are matched with each other: three primary colors, or a combination of three primary colors with one or more mixed colors.

In one or more embodiments of the present application, each of the third light emitting units includes: the third LED light-emitting chip and a third optical packaging component which is packaged outside the third LED light-emitting chip and is provided with third fluorescent powder.

In one or more embodiments of the present application, the light emitting color of each third LED light emitting chip is different, and the composition of the third phosphor in each third optical package component is the same.

In one or more embodiments of the present application, the light emitting color of each third LED light emitting chip is the same, and the composition of the third phosphor in each third optical package component is different.

In one or more embodiments of the present disclosure, each of the third optical package components is connected to form an integral package component with an outer surface having a smooth curved surface.

To achieve the above and other related objects, the present application provides an LED lamp including: one or more of the LED light-emitting devices.

To achieve the above and other related objects, the present application provides an LED display screen, comprising: one or more of the LED light-emitting devices.

As described above, the LED lighting device, the LED lamp, and the LED display screen of the present application include: a plurality of LED light emitting units mounted on the heat sink; wherein, the LED light-emitting units are packaged with at least one fluorescent powder. That is, by encapsulating the same phosphor or encapsulating multiple phosphors with each LED light emitting unit, the light emission color can be easily controlled to be the mixed color of the multiple LED light emitting units, solving the problems of the prior art.

Drawings

Fig. 1 is a schematic structural diagram of an LED lighting device according to a first embodiment of the present disclosure.

Fig. 2 is a schematic structural diagram of an LED lighting device according to a second embodiment of the present application.

Fig. 3 is a schematic structural diagram of an LED lighting device according to a third embodiment of the present application.

Fig. 4 is a schematic structural diagram of an LED lighting device according to a fourth embodiment of the present application.

Detailed Description

The following description of the embodiments of the present application is provided by way of specific examples, and other advantages and effects of the present application will be readily apparent to those skilled in the art from the disclosure herein. The present application is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present application. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.

Embodiments of the present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art to which the present application pertains can easily carry out the present application. The present application may be embodied in many different forms and is not limited to the embodiments described herein.

In order to clearly explain the present application, components that are not related to the description are omitted, and the same reference numerals are given to the same or similar components throughout the specification.

Throughout the specification, when a component is referred to as being "connected" to another component, this includes not only the case of being "directly connected" but also the case of being "indirectly connected" with another element interposed therebetween. In addition, when a component is referred to as "including" a certain constituent element, unless otherwise stated, it means that the component may include other constituent elements, without excluding other constituent elements.

When an element is referred to as being "on" another element, it can be directly on the other element, or intervening elements may also be present. When a component is referred to as being "directly on" another component, there are no intervening components present.

Although the terms first, second, etc. may be used herein to describe various elements in some instances, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, the first interface and the second interface, etc. are described. Also, as used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context indicates otherwise. It will be further understood that the terms "comprises," "comprising," "includes" and/or "including," when used in this specification, specify the presence of stated features, steps, operations, elements, components, items, species, and/or groups, but do not preclude the presence, or addition of one or more other features, steps, operations, elements, components, species, and/or groups thereof. The terms "or" and/or "as used herein are to be construed as inclusive or meaning any one or any combination. Thus, "A, B or C" or "A, B and/or C" means "any of the following: a; b; c; a and B; a and C; b and C; A. b and C ". An exception to this definition will occur only when a combination of elements, functions, steps or operations are inherently mutually exclusive in some way.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" include plural forms as long as the words do not expressly indicate a contrary meaning. The term "comprises/comprising" when used in this specification is taken to specify the presence of stated features, regions, integers, steps, operations, elements, and/or components, but does not exclude the presence or addition of other features, regions, integers, steps, operations, elements, and/or components.

Terms indicating "lower", "upper", and the like relative to space may be used to more easily describe a relationship of one component with respect to another component illustrated in the drawings. Such terms are intended to include not only the meanings indicated in the drawings, but also other meanings or operations of the device in use. For example, if the device in the figures is turned over, elements described as "below" other elements would then be oriented "above" the other elements. Thus, the exemplary terms "under" and "beneath" all include above and below. The device may be rotated 90 or other angles and the terminology representing relative space is also to be interpreted accordingly.

Although not defined differently, including technical and scientific terms used herein, all terms have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. Terms defined in commonly used dictionaries are to be additionally interpreted as having meanings consistent with those of related art documents and the contents of the present prompts, and must not be excessively interpreted as having ideal or very formulaic meanings unless defined.

In view of the shortcomings of the prior art, the present application aims to provide a single or multiple phosphors packaged in a plurality of LED light emitting units, in combination with various color mixing combinations of original color light emission of the LED light emitting chip packaged by the phosphors, and to solve the problems of the prior art

The application provides a LED illuminator, includes: a plurality of LED light emitting units mounted on the heat sink; wherein, the LED light-emitting units are packaged with at least one fluorescent powder.

In a possible embodiment, each LED light-emitting unit comprises an LED light-emitting chip and an optical packaging component wrapping the LED light-emitting chip, wherein the optical packaging component may be a lens material or an encapsulant; optionally, one or more colors of phosphors may be disposed in the optical package, such as by coating the lens material with phosphors, or by making an encapsulant that mixes the phosphors.

It can be understood that the phosphor is excited by the light emitted from the LED light emitting chip to emit light, and the color of the phosphor is complementary to the color of the light emitted from the LED light emitting chip, that is, the color of the light emitted after the phosphor is excited is the mixed color of the light emitted from the LED light emitting chip and the color of the phosphor.

For example, the light emitted from each LED lighting unit may be white light, or primary colors of light mixed into white light, such as R (red), G (green), B (blue), or other colors; correspondingly, the types and colors of the fluorescent powder in each optical packaging component can be matched with the colors of the LED light-emitting chips so as to be capable of mixing white light or corresponding color light.

For example, if three primary color phosphors, i.e., red phosphor, green phosphor and blue phosphor, are disposed in the optical package of one LED light-emitting unit, the LED light-emitting chip may use, for example, an ultraviolet LED chip to emit ultraviolet rays, and excite the three primary color phosphors to form white light; or, the optical packaging component is internally provided with yellow fluorescent powder, and the LED light-emitting chip emits blue light which is mixed with blue-yellow light to form white light.

Or, the three LED light-emitting units respectively emit red light, green light and blue light, and can also be mixed to output white light; the light emitting colors of the three LED light emitting units can be obtained by exciting the fluorescent powder with corresponding colors by light emission of, for example, an ultraviolet LED chip, or can be obtained by emitting light from an LED chip with corresponding colors.

The following shows the structure of a possible LED lighting device by a plurality of embodiments.

Fig. 1 shows a schematic structural diagram of an LED lighting device in a first embodiment of the present application.

In the present embodiment, a plurality of LED light emitting units are mounted on the heating body 101.

The heat dissipation body is preferably a ceramic heat dissipation body, the multiple LED light-emitting units correspond to the multiple LED light-emitting chips, and heat is more, so that the heat dissipation of the multiple LED light-emitting chips is performed by adopting the heat dissipation body made of the ceramic material with the high heat conductivity coefficient, and the heat dissipation problem can be well solved.

The plurality of LED light-emitting units comprise: a plurality of first light emitting units 102. Although 3 are shown in the drawings, the number is not limited thereto.

In the present embodiment, each of the first light-emitting units 102 can emit light of a predetermined color (e.g., white, or other colors such as red, orange, yellow, green, cyan, blue, purple, etc.), and color temperatures of the color lights emitted by different first light-emitting units 102 may be different, for example, color temperatures of white lights emitted by the first light-emitting

units

102A, 102B, and 102C, respectively, are different.

In particular, in a possible embodiment, each first light-emitting unit 102 comprises: a first LED light emitting chip 121, and a first optical package member 122 packaged outside the first LED light emitting chip 121 and provided with a first phosphor; the first phosphor is excited by the first LED chip 121 to output color light.

Optionally, taking the first light emitting unit 102 as white light, the light emitting colors of the first LED light emitting chips 121 of the first light emitting unit 102A, the first light emitting unit 102B and the first light emitting unit 102C may be the same, for example, all of the light emitting colors are blue light or ultraviolet light, or may be different, for example, part of the light emitting colors is blue light, and the other part of the light emitting colors is ultraviolet light; the first phosphors have different compositions, for example, the first phosphors are configured by at least R, G, B phosphors with three primary colors, wherein R, G, B phosphors in one or more of the first phosphors may have different proportions or different contents, or be doped with phosphors with colors other than R, G, B phosphors (for example, yellow Y and/or cyan G).

Optionally, the LED lighting device further includes: the number of the one or more second light emitting units 103 is 2 in the embodiment, but not limited thereto.

The light emitted by the one or more second light emitting units 103 is used to participate in the light mixing to set the color rendering index and/or the color temperature of the light mixing. Optionally, in this embodiment, the number of the second light-emitting units 103 is 2, that is, at least two of the second light-emitting units 103 are provided, where one of the second light-emitting units is used to set a color rendering index of the mixed light (the mixed light of the white light emitted by the first light-emitting unit 102A, the first light-emitting unit 102B, and the first light-emitting unit 102C), and the other is used to set a color temperature of the mixed light.

The setting means that due to the presence of the second light emitting unit 103, the light emitted therefrom participates in the mixed light compared to the absence thereof, thereby changing the color temperature/color rendering index of the mixed light; thus, when the light emitted from the second light emitting unit 103 is determined, the color temperature/color rendering index of the mixed light can be controlled by adding the light to the LED light emitting device.

Each of the second light emitting units 103 includes: a second LED light emitting chip 131, and a second optical packaging member 132 packaged outside the second LED light emitting chip 131. Optionally, transparent phosphor or no phosphor is disposed in the second optical package component 132, and the second LED light emitting chip 131 can be selected to emit light with a desired color, such as blue; of course, the second optical package component 132 may also include phosphor powder with a desired color, and the combination of the color of the phosphor powder and the light emitting color of the LED light emitting chip can find a corresponding theoretical basis in the above embodiments or the conventional colorimetry, which is not described herein in any detail.

As shown in fig. 2, a schematic structural diagram of an LED lighting device in a second embodiment of the present application is shown.

Compared with the first embodiment, the heat radiator 201 is still used for radiating heat of the plurality of LED light-emitting units 202; the main differences in this embodiment are: the first phosphors in the first optical package parts 222 of the first

light emitting units

202A, 202B and 202C are the same composition, and the first LED light emitting chips 221 in the first optical package parts 222 of the first

light emitting units

202A, 202B and 202C may be the same, thereby outputting a mixed light of a fixed color temperature; alternatively, the first LED light emitting chips 221 in the first optical packaging member 222 of the first

light emitting units

202A, 202B and 202C may also be different, such as different power, different light emitting colors, etc.

The structure of the second light emitting unit 203 in this embodiment may be similar to the second light emitting unit 103 in the first embodiment, and therefore, the description thereof is not repeated.

Referring to fig. 3, a schematic structural diagram of an LED lighting device in a third embodiment of the present application is shown.

Compared with the first and second embodiments, the present embodiment has the following main differences in that:

the plurality of LED light-emitting units comprise: a plurality of third light emitting units 302; the light emitting colors of the third light emitting units 302 are matched with each other to form a mixed light with a desired color.

In a possible embodiment, taking the mixed light as white light as an example, the types of the light emitting colors of the third light emitting units 302 matching each other include: three primary colors, or a combination of three primary colors with one or more mixed colors.

For example, in fig. 3, 4 third light-emitting units 302 are shown, of which 3 emit R, G, B colors of light, thereby being capable of mixing into white light; the light emission color of the remaining one third light emitting unit 302 is a color for mixing light, for example, yellow Y or cyan G.

Each of the third light emitting units 302 includes: a third LED light emitting chip 321, and a third optical packaging member 322 packaged outside the third LED light emitting chip 321 and provided with a third phosphor.

Optionally, in some embodiments, the third LED light emitting chips 321 of the respective third light emitting units 302 emit light differently, and the third phosphors have the same composition, for example, 4 third LED light emitting chips output light of R, G, B, Y colors, respectively, and the respective third phosphors may be transparent phosphors; alternatively, the 4 third LED light emitting chips respectively output ultraviolet light, and the third phosphors may be phosphors corresponding to R, G, B, Y colors.

As shown in fig. 4, a schematic structural diagram of an LED lighting device in a fourth embodiment of the present application is shown.

Still using the heat dissipation body 401 for heat dissipation, compared to the aforementioned third embodiment, the main difference of this embodiment is:

the colors of the third phosphors provided in the third

optical packaging parts

432A, 432B, 432C, 432D included in the respective third light emitting units may be different, and the light emitting colors of the respective third LED light emitting chips (431A, 431B, 431C, 431D) may be the same.

Alternatively, in this embodiment, each of the third

optical packaging components

432A, 432B, 432C, 432D (e.g., the packaging adhesive) may be a part, and connected to form an integral packaging component with an outer surface having a smooth curved surface, that is, a curved lens is seen from the appearance, and the third

optical packaging components

432A, 432B, 432C, 432D with different shapes are actually spliced together as a component.

The LED lighting device described in the above embodiments may be applied to practical products, such as LED lamps, LED display screens, and the like, and may include one or more LED lighting devices in the above embodiments, and a plurality of LED lighting units capable of emitting light with a desired color by selectively encapsulating the same or different types of phosphors can achieve a desired mixed light output; optionally, the LED light-emitting device which adopts the ceramic heat sink to dissipate heat of the plurality of LED light-emitting units has good heat dissipation performance, so that the service lives of the LED lamp and the LED display screen can be effectively prolonged, and the user experience is improved.

To sum up, LED illuminator, LED lamps and lanterns and LED display screen of this application, LED illuminator includes: a plurality of LED light emitting units mounted on the heat sink; wherein, the LED light-emitting units are packaged with at least one fluorescent powder. That is, by encapsulating the same phosphor or encapsulating multiple phosphors with each LED light emitting unit, the light emission color can be easily controlled to be the mixed color of the multiple LED light emitting units, solving the problems of the prior art.

The above embodiments are merely illustrative of the principles and utilities of the present application and are not intended to limit the application. Any person skilled in the art can modify or change the above-described embodiments without departing from the spirit and scope of the present application. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical concepts disclosed in the present application shall be covered by the claims of the present application.

Claims

1. An LED light-emitting device, characterized in that, comprising:

A plurality of LED light-emitting units are mounted on the heat sink;

Wherein, the plurality of LED light-emitting units are packaged with at least one phosphor.

2 . The LED lighting device according to claim 1 , wherein the heat sink is made of ceramic material. 3 .

3 . The LED lighting device according to claim 1 , wherein the light emitted from the plurality of LED lighting units is mixed into a mixed light output of a predetermined color. 4 .

4. The LED lighting device according to claim 1, wherein the plurality of LED lighting units comprise:

One or more first light-emitting units; each first light-emitting unit includes: a first LED light-emitting chip, and a first optical packaging component encapsulated outside the first LED light-emitting chip and provided with a first phosphor powder; wherein, the The first phosphor is excited by the irradiation of the first LED light-emitting chip and outputs: the light of the color determined by the mixture of the color of the first phosphor powder and the light-emitting color of the first LED light-emitting chip.

5. The LED lighting device according to claim 4, wherein the plurality of LED lighting units further comprises:

One or more second light-emitting units; each second light-emitting unit includes: a second LED light-emitting chip, and a second optical packaging component packaged outside the second LED light-emitting chip; wherein, the one or more second light-emitting units The light emitted from the unit is used to participate in the light mixing to set the color rendering index and/or color temperature of the mixed light.

6 . The LED light-emitting device according to claim 4 , wherein there are a plurality of first light-emitting units, the light-emitting colors of the first LED light-emitting chips are the same or different, and the compositions of the first phosphors are different. 7 . Make the color temperature of each output light different.

7 . The LED light-emitting device according to claim 4 , wherein there are a plurality of the first light-emitting units, the light-emitting colors of their first LED light-emitting chips are the same, and the compositions of the first phosphors are the same so that each The color temperature of the output light is the same.

8 . The LED light-emitting device according to claim 4 , wherein the first phosphor powder comprises: phosphor powder of a plurality of primary colors for forming white light in coordination with the light-emitting color of the first LED light-emitting chip. 9 .

9 . The LED lighting device according to claim 5 , wherein each LED lighting unit comprises: at least two second lighting units, which are respectively used to set the color rendering index and color temperature of the mixed light. 10 .

10 . The LED lighting device according to claim 4 , wherein the second optical packaging component contains transparent phosphors or does not contain phosphors. 11 .

11. The LED lighting device according to claim 1, wherein the plurality of LED lighting units comprise:

A plurality of third light-emitting units; wherein the light-emitting colors of the third light-emitting units cooperate with each other to be mixed into a mixed light of a predetermined color.

12 . The LED lighting device according to claim 11 , wherein the light output color of each third light emitting unit is white light, and the types of mutual cooperation include: three primary colors, or three primary colors combined with one or more mixed light colors. 13 .

13. The LED lighting device according to claim 11, wherein each of the third lighting units comprises:

A third LED light-emitting chip, and a third optical packaging component encapsulated outside the third LED light-emitting chip and provided with a third phosphor powder.

14 . The LED light-emitting device of claim 13 , wherein the light-emitting colors of the third LED light-emitting chips are different, and the composition of the third phosphors in the third optical packaging components is the same. 15 .

15 . The LED light-emitting device of claim 13 , wherein the light-emitting colors of the third LED light-emitting chips are the same, and the compositions of the third phosphors in the third optical packaging components are different. 16 .

16. The LED lighting device according to any one of claims 13 to 15, wherein each of the third optical packaging components is connected to each other to form an integral packaging component whose outer surface is a smooth curved surface.

17. An LED lamp, characterized in that, comprising: one or more LED lighting devices according to any one of claims 1 to 16.

18. An LED display screen, characterized by comprising: one or more LED lighting devices according to any one of claims 1 to 16.