CN102278618A - LED lamp - Google Patents
LED lamp Download PDFInfo
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- CN102278618A CN102278618A CN2010102011426A CN201010201142A CN102278618A CN 102278618 A CN102278618 A CN 102278618A CN 2010102011426 A CN2010102011426 A CN 2010102011426A CN 201010201142 A CN201010201142 A CN 201010201142A CN 102278618 A CN102278618 A CN 102278618A
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Abstract
The invention provides an LED lamp, comprising four groups of luminescent wafers and a first group of phosphor powder light-emitting elements. Coordinate points of lights that are obtained after mixing of lights emitted by the four groups of luminescent wafers on a CIE 1931 chromaticity diagram are away from blackbody radiation curves in the chromaticity diagram by a distance at least ten times the MacAdam Ellipse. Coordinate points of lights that are obtained by mixing lights emitted by the first group of luminescent wafers and the first group of phosphor powder light-emitting elements on the CIE 1931 chromaticity diagram are limited within the prospective region. The prospective region is a closed region surrounded by four points. The coordinates of the four points are (0.2, 0.17), (0.32, 0.49), (0.54, 0.33) and (0.26, 0.12), respectively. The LED lamp of the invention can reflect true colors of objects more accurately.
Description
Technical field
The present invention relates to the LED lighting technical field, particularly a kind of LED light fixture.
Background technology
MacAdam's ellipse is by the elliptic region of the chromaticity coordinate of center, close horizontal inclination angle and variance scope definition, and this ellipse has defined the chromaticity coordinate scope that is limited by correlated colour temperature.
LED is a kind of solid-state semiconductor device that electric energy can be converted into visible light, has the light efficiency height, the life-span is long, operating temperature is low, advantage such as pollution-free, therefore is called as green illumination light source.
In order to more clearly understand lighting technical field, below the simple colour rendering down of introducing.
Colour rendering is the influence of lighting source to the object color table.The demonstration of color of object surface is also depended on the spectral power distribution of light source except the characteristic that is decided by body surface.When the light source of irradiating object had different spectral power distribution, the color that body surface shows also difference can occur.
The colour rendering of light source is meant the degree that is consistent with the color that shows in the color that body surface under the light source irradiation shows under the reference light source irradiation.The colour rendering of light source characterizes with colour rendering index usually.Colour rendering index be the quantitative analysis sample of colour under light source with the matching degree of true colors, the colour rendering index maximum is 100.Show index be 100 expression samples of colour under light source shown color with its really the aberration of color be zero, promptly conform to fully.The demonstration index of daylight is 100, and the demonstration index of incandescent lamp probably is 95, and the demonstration index of fluorescent lamp is about 70-80.Show that people's the instant response time can significant prolongation when index was low.
Existing LED lamp is a kind of encapsulating products, and the LED luminescent wafer is encapsulated in the same unit by being electrically connected.White light generally is the mixing of two or more band of light, white light LEDs can be by the integrated generation that is packaged together of three kinds of luminescent wafers of RGB, also can send blue light and be wrapped in yellow fluorescent powder around the wafer by the blue light wafer to inspire yellow light mix and produce.
The light efficiency of present led light source is higher, but colour rendering index is lower.For example the blue light wafer demonstration index that adds the fluorescent material encapsulated LED is generally about 75, for red and dark green colour developing ability is relatively poor.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of LED light fixture, has higher colour rendering index.
The invention provides a kind of LED light fixture, comprising: four groups of luminescent wafers are respectively first group of luminescent wafer, second group of luminescent wafer, the 3rd group of luminescent wafer and the 4th group of luminescent wafer; Also comprise first group of light-emitting phosphor element;
Described first group of luminescent wafer, being used to send dominant wavelength ranges is the light of 430nm to 480nm;
Described second group of luminescent wafer, being used to send dominant wavelength ranges is the light of 600nm to 630nm;
Described the 3rd group of luminescent wafer, being used to send dominant wavelength ranges is the light of 490nm to 540nm;
Described the 4th group of luminescent wafer, being used to send dominant wavelength ranges is the light of 570nm to 600nm;
Described first group of light-emitting phosphor element, being used to send dominant wavelength ranges is the light of 550nm to 590nm;
The x of the light that light that described four groups of luminescent wafers send obtains after mixing on CIE 1931's chromatic diagram, y coordinate points at least apart from the blackbody radiance curve in the chromatic diagram in ten times of MacAdam's ellipse scopes;
X, the y coordinate points of light on CIE 1931's chromatic diagram that the light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send obtains after mixing is limited in the presumptive area on the chromatic diagram, and described presumptive area is the closed area that is surrounded by four points; The coordinate of these four points is respectively (0.2,0.17), (0.32,0.49), (0.54,0.33) and (0.26,0.12).
Preferably, the mixed light of light that sends of the light that sends of described first group of luminescent wafer and first group of light-emitting phosphor element is white light; The light that described second group of luminescent wafer sends is ruddiness; Described the 3rd group of light that luminescent wafer sends is green glow; Described the 3rd group of light that luminescent wafer sends is gold-tinted.
Preferably, every group of luminescent wafer comprises at least one LED in described four groups of luminescent wafers.
Preferably, the ratio of the luminous power of the light, the 3rd group of light that luminescent wafer sends and the 4th group of light that luminescent wafer sends that send of the mixed light of light that sends of the light that sends of described first group of luminescent wafer and first group of light-emitting phosphor element, second group of luminescent wafer is: 4: 2: 1: 1.
Preferably, described first group of luminescent wafer comprises 8 white light LEDs; Described second group of luminescent wafer comprises 4 red LED; The 3rd group of luminescent wafer comprises 2 green light LEDs; The 4th group of luminescent wafer comprises 2 yellow light LEDs;
The luminous power of every described LED is identical.
Preferably, the dominant wavelength of the light that described first group of luminescent wafer sends is 460nm, applies YAG fluorescent material around the luminescent wafer.
Preferably, also comprise aluminium base, lamp body, radiator and diffusion shell;
Described four groups of luminescent wafers are welded on the described aluminium base;
Described aluminium base is connected on the described lamp body by heat-conducting glue; The inner surface of described lamp body is provided with reflectance coating;
Described radiator and lamp body have a style of one's own;
Described diffusion shell is positioned at the top of described lamp body, is used to seal described four groups of luminescent wafers.
Compared with prior art, the present invention has the following advantages:
LED light fixture provided by the invention comprises four groups of luminescent wafers, and the light that these four groups of luminescent wafers send can reach higher colour rendering index after mixing, thereby can react the true colors of object more accurately.
Description of drawings
Fig. 1 is the profile of LED light fixture provided by the invention;
Fig. 2 is an area schematic that defines in International Commission on Illumination (CIE) 1931 chromatic diagrams;
Fig. 3 is the schematic diagram of the luminescent wafer that provides of the embodiment of the invention.
The specific embodiment
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the specific embodiment of the present invention is described in detail below in conjunction with accompanying drawing.
The CIE1931 chromatic diagram relevant with the present invention as shown in Figure 2, represented different colors in the chromatic diagram by chromaticity coordinates x and y.Leg-of-mutton frame is represented the distribution of color of the high colour saturation of different spectrum, all tones that can feel comprising human eye.Deviation in chromatic diagram between 2 can directly be represented with chromaticity coordinates x and y, also can represent with MacAdam's ellipse.A curve of its central area is a blackbody radiance curve, on the blackbody radiance curve or fringe region be white light field, white light field has comprised the different white light colour temperature sections from low colour temperature to high colour temperature, and Fig. 2 acceptance of the bid shows the coordinate points position of 2500K on the blackbody radiance curve, 3000K, 3800K, 5600K, 6300K, 10000K colour temperature.The chromaticity coordinates regional extent of the light that obtains after the light that the light that first group of luminescent wafer of 6 expressions sends among Fig. 2 and first group of light-emitting phosphor element send mixes.
The LED light fixture that present embodiment provides comprises: four groups of luminescent wafers are respectively first group of luminescent wafer, second group of luminescent wafer, the 3rd group of luminescent wafer and the 4th group of luminescent wafer; Also comprise first group of light-emitting phosphor element;
Described first group of luminescent wafer, being used to send dominant wavelength ranges is the light of 430nm to 480nm;
Described second group of luminescent wafer, being used to send dominant wavelength ranges is the light of 600nm to 630nm;
Described the 3rd group of luminescent wafer, being used to send dominant wavelength ranges is the light of 490nm to 540nm;
Described the 4th group of luminescent wafer, being used to send dominant wavelength ranges is the light of 570nm to 600nm;
Described first group of light-emitting phosphor element, being used to send dominant wavelength ranges is the light of 550nm to 590nm;
The x of the light that light that described four groups of luminescent wafers send obtains after mixing on CIE 1931's chromatic diagram, y coordinate points at least apart from the blackbody radiance curve in the chromatic diagram in ten times of MacAdam's ellipse scopes;
X, the y coordinate points of light on CIE 1931's chromatic diagram that the light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send obtains after mixing is limited on the chromatic diagram in the presumptive area that four line segments surround, and described presumptive area is the closed area that is surrounded by four points; The coordinate of these four points is respectively (0.2,0.17), (0.32,0.49), (0.54,0.33) and (0.26,0.12).
Need to prove that these four points are four summits of this closed area, connect these four summits and obtain four line segments that these four line segments surround this closed area.
The LED light fixture that present embodiment provides comprises four groups of luminescent wafers and one group of light-emitting phosphor element, wherein, first group of luminescent wafer and first group of light-emitting phosphor element are made a kind of mixed light of as a whole generation, and other three groups of luminescent wafers produce monochromatic light separately respectively.It is higher that these four kinds of light mix the colour rendering index of light of generation, can reach more than 90.
Need to prove, the colour temperature that this LED light fixture produces not simultaneously, correspondence flows through the electric current difference of LED.
The light that the LED light fixture that the embodiment of the invention provides sends by four groups of luminescent wafers mixes to produce and shows the higher light of index.
Need to prove that every group of luminescent wafer can comprise at least one LED.
Preferably, the mixed light of light that sends of the light that sends of described first group of luminescent wafer and first group of light-emitting phosphor element is white light; The light that described second group of luminescent wafer sends is ruddiness; Described the 3rd group of light that luminescent wafer sends is green glow; Described the 3rd group of light that luminescent wafer sends is gold-tinted.
Introduce the structure of LED light fixture in detail below in conjunction with Fig. 1.
Referring to Fig. 1, this figure is the profile of LED light fixture provided by the invention.
The LED light fixture that present embodiment provides comprises four groups of luminescent wafers 3, aluminium base 4, lamp body 2, radiator and diffusion shell 1;
Described four groups of luminescent wafers 3 are welded on the described aluminium base 4;
Described aluminium base 4 is connected on the described lamp body 2 by heat-conducting glue; The inner surface of described lamp body 2 is provided with reflectance coating 21;
Described radiator 2 and lamp body have a style of one's own;
Described diffusion shell 1 is positioned at the top of described lamp body 2, is used to seal described four groups of luminescent wafers 3.
Need to prove that the ratio of the luminous power of light, the 3rd group of light that luminescent wafer sends and the 4th group of light that luminescent wafer sends that the mixed light of light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send, second group of luminescent wafer send is: 4: 2: 1: 1.
Referring to Fig. 3, this figure is the schematic diagram of the luminescent wafer that provides of the embodiment of the invention.
The LED luminescent wafer that present embodiment provides comprises four luminescence units, comprising two first luminescence units 11, comprises two second luminescence units 22.As shown in Figure 3, these four luminescence units are evenly distributed in the square.Wherein, two first luminescence units 11 are distributed on the foursquare upper left lower-right diagonal position line, and two second luminescence units 22 are distributed on the diagonal of foursquare upper right lower-left.
Introduce the composition of first luminescence unit 11 and second luminescence unit 22 in detail below in conjunction with Fig. 3.
At first, implication of each letter representative among Fig. 3 once is described, R represents red LED, and W represents White LED, and Y represents yellow led, and G represents green LED.
First group of luminescence unit 11 comprises a R, a Y and two W, promptly comprises a red LED, a yellow led and two White LEDs.These four LED also are evenly distributed in the square, and wherein, foursquare upper left side is a red LED, and the lower right is a yellow led, and the upper right side is a White LED, and the lower left also is a White LED.
Second group of luminescence unit 22 comprises a R, a G and two W, promptly comprises a red LED, a green LED and two White LEDs.These four LED also are evenly distributed in the square, and wherein, foursquare upper left side is a red LED, and the lower right is a green LED, and the upper right side is a White LED, and the lower right also is a White LED.
Need to prove that Fig. 3 only is the embodiment that the embodiment of the invention provides, be understandable that, Fig. 3 can be regarded as a luminescent wafer unit, LED light fixture can comprise the integral multiple of luminescent wafer unit shown in Figure 3.
The light that luminescent wafer in the LED light fixture that the embodiment of the invention provides sends can reach higher colour rendering index, can react the real color of object more accurately.
The above only is preferred embodiment of the present invention, is not the present invention is done any pro forma restriction.Though the present invention discloses as above with preferred embodiment, yet be not in order to limit the present invention.Any those of ordinary skill in the art, do not breaking away under the technical solution of the present invention scope situation, all can utilize the method and the technology contents of above-mentioned announcement that technical solution of the present invention is made many possible changes and modification, or be revised as the equivalent embodiment of equivalent variations.Therefore, every content that does not break away from technical solution of the present invention, all still belongs in the scope of technical solution of the present invention protection any simple modification, equivalent variations and modification that above embodiment did according to technical spirit of the present invention.
Claims (7)
1. a LED light fixture is characterized in that, comprising: four groups of luminescent wafers are respectively first group of luminescent wafer, second group of luminescent wafer, the 3rd group of luminescent wafer and the 4th group of luminescent wafer; Also comprise first group of light-emitting phosphor element;
Described first group of luminescent wafer, being used to send dominant wavelength ranges is the light of 430nm to 480nm;
Described second group of luminescent wafer, being used to send dominant wavelength ranges is the light of 600nm to 630nm;
Described the 3rd group of luminescent wafer, being used to send dominant wavelength ranges is the light of 490nm to 540nm;
Described the 4th group of luminescent wafer, being used to send dominant wavelength ranges is the light of 570nm to 600nm;
Described first group of light-emitting phosphor element, being used to send dominant wavelength ranges is the light of 550nm to 590nm;
The x of the light that light that described four groups of luminescent wafers send obtains after mixing on CIE 1931's chromatic diagram, y coordinate points at least apart from the blackbody radiance curve in the chromatic diagram in ten times of MacAdam's ellipse scopes;
X, the y coordinate points of light on CIE 1931's chromatic diagram that the light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send obtains after mixing is limited in the presumptive area on the chromatic diagram, and described presumptive area is the closed area that is surrounded by four points; The coordinate of these four points is respectively (0.2,0.17), (0.32,0.49), (0.54,0.33) and (0.26,0.12).
2. LED light fixture according to claim 1 is characterized in that, the mixed light of light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send is white light; The light that described second group of luminescent wafer sends is ruddiness; Described the 3rd group of light that luminescent wafer sends is green glow; Described the 3rd group of light that luminescent wafer sends is gold-tinted.
3. LED light fixture according to claim 1 is characterized in that, every group of luminescent wafer comprises at least one LED in described four groups of luminescent wafers.
4. LED light fixture according to claim 1 and 2, it is characterized in that the ratio of the luminous power of light, the 3rd group of light that luminescent wafer sends and the 4th group of light that luminescent wafer sends that the mixed light of light that the light that described first group of luminescent wafer sends and first group of light-emitting phosphor element send, second group of luminescent wafer send is: 4: 2: 1: 1.
5. LED light fixture according to claim 4 is characterized in that, described first group of luminescent wafer comprises 8 white light LEDs; Described second group of luminescent wafer comprises 4 red LED; The 3rd group of luminescent wafer comprises 2 green light LEDs; The 4th group of luminescent wafer comprises 2 yellow light LEDs;
The luminous power of every described LED is identical.
6. LED light fixture according to claim 1 is characterized in that, the dominant wavelength of the light that described first group of luminescent wafer sends is 460nm, applies YAG fluorescent material around the luminescent wafer.
7. LED light fixture according to claim 1 is characterized in that, also comprises aluminium base, lamp body, radiator and diffusion shell;
Described four groups of luminescent wafers are welded on the described aluminium base;
Described aluminium base is connected on the described lamp body by heat-conducting glue; The inner surface of described lamp body is provided with reflectance coating;
Described radiator and lamp body have a style of one's own;
Described diffusion shell is positioned at the top of described lamp body, is used to seal described four groups of luminescent wafers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102011426A CN102278618A (en) | 2010-06-09 | 2010-06-09 | LED lamp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102011426A CN102278618A (en) | 2010-06-09 | 2010-06-09 | LED lamp |
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| CN102278618A true CN102278618A (en) | 2011-12-14 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007059272A (en) * | 2005-08-25 | 2007-03-08 | Omron Corp | Lighting system and lighting method |
| CN101392891A (en) * | 2007-09-18 | 2009-03-25 | 华兴电子工业股份有限公司 | Array type illuminating device with high colour rendering |
| CN201232879Y (en) * | 2008-07-22 | 2009-05-06 | 深圳市同洲电子股份有限公司 | High color rendering property LED lamp |
| US20090114932A1 (en) * | 2007-11-05 | 2009-05-07 | Enertron, Inc. | Light Source and Method of Controlling Light Spectrum of an LED Light Engine |
| CN201434229Y (en) * | 2009-04-11 | 2010-03-31 | 中山泰腾灯饰有限公司 | Spotlight LED lamp |
| CN201739821U (en) * | 2010-06-09 | 2011-02-09 | 艾迪光电（杭州）有限公司 | LED lamp |
-
2010
- 2010-06-09 CN CN2010102011426A patent/CN102278618A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007059272A (en) * | 2005-08-25 | 2007-03-08 | Omron Corp | Lighting system and lighting method |
| CN101392891A (en) * | 2007-09-18 | 2009-03-25 | 华兴电子工业股份有限公司 | Array type illuminating device with high colour rendering |
| US20090114932A1 (en) * | 2007-11-05 | 2009-05-07 | Enertron, Inc. | Light Source and Method of Controlling Light Spectrum of an LED Light Engine |
| CN201232879Y (en) * | 2008-07-22 | 2009-05-06 | 深圳市同洲电子股份有限公司 | High color rendering property LED lamp |
| CN201434229Y (en) * | 2009-04-11 | 2010-03-31 | 中山泰腾灯饰有限公司 | Spotlight LED lamp |
| CN201739821U (en) * | 2010-06-09 | 2011-02-09 | 艾迪光电（杭州）有限公司 | LED lamp |
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Address after: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Applicant after: LED ONE (Hangzhou) Co., Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Applicant before: Aidi Photoelectric (Hangzhou) Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: LED ONE (HANGZHOU) LIMITED COMPANY TO: LED ONE (HANGZHOU) CO., LTD. |
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Owner name: ZHEJIANG THINKLUX LIGHTING TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: INVENTRONICS (HANGZHOU), INC. Effective date: 20130329 |
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Effective date of registration: 20130329 Address after: Hangzhou City, Zhejiang province Binjiang District 315002 shore road 95 2 Building 3 layer Applicant after: Thinklux (Zhejiang) Lighting Technology Co., Ltd. Address before: Hangzhou City, Zhejiang province 310053 Binjiang District Dongxin Road No. 66 East communication B block 309 Applicant before: LED ONE (Hangzhou) Co., Ltd. |
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Application publication date: 20111214 |