CN103839935A - Integrated white light LED light source high in color expression capacity - Google Patents
Integrated white light LED light source high in color expression capacity Download PDFInfo
- Publication number
- CN103839935A CN103839935A CN201410095257.XA CN201410095257A CN103839935A CN 103839935 A CN103839935 A CN 103839935A CN 201410095257 A CN201410095257 A CN 201410095257A CN 103839935 A CN103839935 A CN 103839935A
- Authority
- CN
- China
- Prior art keywords
- light led
- spectrum
- led chip
- light source
- light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention discloses an integrated white light LED light source high in color expression capacity. The light source comprises dark blue light LED chips, blue light LED chips, a substrate and fluorescent powder layers, wherein the dark blue light LED chips and the blue light LED chips are evenly distributed on the substrate with a quantitative proportion of 1:5 - 1:10, the upper surface of each dark blue light LED chip is coated with a yellow fluorescent powder layer, and the upper surface of each blue light LED chip is coated with a yellow fluorescent powder layer. According to the light source, the radiation spectrum of a low-color-temperature while light LED is improved. Compared with the existing low-color-temperature white light LED, the light source has the advantages that the peak wavelength of the improved radiator spectrum deviates to a high band; meanwhile, due to the additional arrangement of a 380 nm - 430 nm dark blue light wave band, the spectrum of the white light LED is closer to the spectrum of a traditional metal halide lamp and the spectrum of natural light on visible wavebands, and red, green, blue, white, purple and other conventional color expression capacity is improved greatly.
Description
Technical field
The invention belongs to technical field of semiconductor illumination, be specifically related to a kind of integrated form white LED light source with high color representation ability.
Background technology
Energy-conservation new light sources-LED as 21 century develops rapidly, and along with the continuous progress of encapsulation and application technology, LED light fixture just progressively replaces conventional lamp and is used widely in commercial lighting field.
The ceramet Halogen lamp LED (ceramic gold-halogen lamp) adopting in traditional commercial lighting is a kind of more advanced light source, mainly relies on metal halide as luminescent material.Metal halide exists in lamp with solid forms, light fixture is lighted after work, metal halide raises and constantly evaporates and become metal halide steam with temperature, under the effect of thermal convection, constantly flow to arc center, a part of metal halide, by electric arc 5500～6000K pyrolysis, becomes metallic atom and halogen atom, under the effect of electric field, metallic atom is excited luminous; Another part metal halide is not decomposed by high arc temperature, under high temperature and electric field double action, directly excites formation mulecular luminescence.Due to various metal halide evaporating temperature differences, therefore, it is luminous that these particles evaporate participation successively, so there is different atom spectrum in succession to occur, along with the rising gradually of temperature, in electric arc, metallic atom density increases gradually, produce resonance absorption, atomic features spectrum weakens gradually until disappear, and expand to long-wave band, because lamp temperature further improves and sets up heat balance, so all metal halide evaporations, molecular spectrum occurs thereupon, photochromic and brightness also tends towards stability, lamp internal gas pressure can reach tens atmospheric pressure, in lamp, electric arc transfers high pressure arc discharge to by low pressure arc discharge, voltage of both ends of lamp is stabilized to 100V left and right gradually, enter normal luminance.
Artificial light light source is all the evaluation index as color rendering with general colour rendering index, and color rendering index is also the Important Parameters of weighing light source colour characteristic simultaneously.According to CIE color rendering index computing method, color rendering index values and the spectral distribution of light source are closely related, more approach nature spectrum (or perhaps standard spectrum), and color rendering index is higher.Calculating for conventional light source color rendering index has various test and has set up relevant criterion, but while utilizing color rendering index to evaluate LED color rendering, the color rendering of reflection LED light fixture that sometimes but can not be correct.
Due to the spectrum of metal halide lamp be on the basis of continuous spectrum superposition intensive line-spectra, therefore color rendering index is high especially, be that color reducibility is good especially, metal halide lamp is because brightness is high, volume is little, therefore comparative lifetime is shorter, due to the restriction of material, technique, another shortcoming of metal halide lamp is difficulty in starting, necessary with special trigger.
Current, along with the continuous progress of semiconductor lighting technology, the luminous efficiency of LED light source constantly promotes, and has substantially exceeded Metal halogen lamp on the market at present for the white light LEDs light efficiency throwing light on.LED is little with its volume simultaneously, and response is fast, without features such as stroboscopics, aspect alternative traditional Metal halogen lamp tool, has greater advantage.
The now LED device for throwing light on, the pattern of almost having used yellow fluorescent powder to add blue light completely produces white light, LED chip sends blue light, a part for light incides the light that inspires another kind of yellow on yellow fluorescent powder, these two kinds of light mix generation white light, and its typical spectral composition is as Fig. 1 solid line.As seen from Figure 1, the spectrum of the light that LED sends is incomplete, and such spectrum will inevitably cause the defects of vision of human eye for throwing light on, and makes eye-observation feel uncomfortable.Although the high-pressure sodium lamp that its color rendering is used than conventional road lamp is high a lot, lower than incandescent lamp.
In low color rendering index LED spectrum, lack peony, blue-green, purple light emittance, due to part spectrum disappearance, even if the LED of high color rendering index (CRI) and high R9 is also poor for the color reducing power of white object, can show colour cast Huang and dim sensation.
Therefore how to produce the white light of high-color rendering, the key point that under especially low colour temperature, the white light of high-quality becomes LED and enters general lighting.At present, the composition of change fluorescent material and coating ratio, mode, and be the focus that people study by the luminous more perfect white-light spectrum of spectral composition that is mixed to get of other three-primary color LED chips or multiple monochromatic LED chip.
Summary of the invention
The present invention aims to provide a kind of integrated form white LED light source with high color representation ability, by the luminous more perfect white-light spectrum of spectral composition that is mixed to get of multiple monochromatic LED chip.
Technical scheme of the present invention is as follows:
The invention provides a kind of integrated form white LED light source with high color representation ability, this LED light source comprises dark blue-light LED chip, blue-light LED chip, substrate and phosphor powder layer; The radiation spectrum wave band of described dark blue-light LED chip is 380nm～430nm, emission peak is 400～410nm, excitation spectrum peak value after excitated fluorescent powder is 650nm, the radiation spectrum wave band of described blue-light LED chip is 440nm～470nm, and described dark blue-light LED chip and blue-light LED chip are evenly arranged on described substrate with the quantitative proportion of 1:5～1:10; Described phosphor powder layer is yellow, is coated in the upper surface of described dark blue-light LED chip and described blue-light LED chip.
Useful technique effect of the present invention is:
The present invention adopts the blue chip of two kinds of specifications to arrange with the ratio of some, then applies the fluorescent material of the high firing rate matching, and obtains radiation spectrum.The present invention has improved the radiation spectrum of low color temperature white light LED.As shown in Figure 1, solid line is the relative radiation spectrum of the low color temperature white light LED of prior art production, dotted line is to improve relative radiation spectrum afterwards, compared to existing low color temperature white light LED, radiation spectrum peak wavelength after improvement is offset to high band, increased by the dark blue optical band of 380～430nm simultaneously, make white light LEDs more approach the spectrum of conventional metals halogenic lamps and lanterns and natural daylight at the spectrum of visible light wave range, on the expressive ability of the conventional color such as red, green, blueness, white and purple, greatly strengthen.
Brief description of the drawings
Fig. 1 is the comparison diagram of prior art and relative radiation spectrum of the present invention.
Fig. 2 is relative radiation spectrum separately after two kinds of LED chip excitated fluorescent powders of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
As shown in Figure 1, solid line is the radiation spectrum of the low color temperature white light LED light source (hereinafter to be referred as conventional LED) of existing routine techniques production, and dotted line is the radiation spectrum of the white LED light source after the present invention improves.Contrast can find out, the radiation spectrum of conventional LED is in 380～430nm wave band disappearance, simultaneously in the proportion relative deficiency of the red spectral band of 600～780nm.Therefore the present invention has the LED chip of the emission spectrum in the not enough region of conventional LED by interpolation, in the case of ensure the light conversion efficiency of final light source less even substantially constant, obtain the light source of high color representation ability.Actual test result shows, the variation that this kind of the present invention changes caused light conversion efficiency is in 5%.Meanwhile, because do not change the packing forms of original LED, therefore can bring hardly the packaging cost of final light source and the increase of technique.
The selected emission spectrum wave band of dark blue-light LED chip that the present invention adds is controlled at the dark blue wave band of 380～430nm, emission peak is 400～410nm, excitation spectrum after excitated fluorescent powder concentrates between 530～700nm, as shown in curve in Fig. 22, wherein peak wavelength mainly concentrates between 630～680nm.The spectrophotometric curve of the blue-light LED chip that in Fig. 2, curve 1 is conventional LED.
In actual preparation process, the dark blue-light LED chip being added by blue-light LED chip and the present invention of conventional LED is evenly arranged on substrate with special ratios, and the ratio of dark blue-light LED chip (wavelength: 380nm～430nm) and blue-light LED chip (wavelength: 440nm～470nm) is between 1:5～1:10.Wherein dark blue-light LED chip can adopt Epistar(Taiwan wafer photoelectricity) deep blue family chip, blue-light LED chip is continued to use existing chip.Two kinds of chip tops all apply yellow fluorescence bisque.Dark blue-light LED chip and blue-light LED chip partial radiation energy will directly see through phosphor powder layer and penetrate, wherein after blue-light LED chip excitated fluorescent powder, launch the relative radiation spectrum shown in curve 1 in Fig. 2, after dark blue-light LED chip excitated fluorescent powder, launch the relative radiation spectrum shown in curve 2 in Fig. 2, by obtaining spectrum of the present invention after two kinds of spectrum stacks.
Above-described is only the preferred embodiment of the present invention, the invention is not restricted to above embodiment.Be appreciated that the oher improvements and changes that those skilled in the art directly derive or associate without departing from the spirit and concept in the present invention, within all should thinking and being included in protection scope of the present invention.
Claims (1)
1. an integrated form white LED light source with high color representation ability, is characterized in that, comprises dark blue-light LED chip, blue-light LED chip, substrate and phosphor powder layer; The radiation spectrum wave band of described dark blue-light LED chip is 380nm～430nm, emission peak is 400～410nm, excitation spectrum peak value after excitated fluorescent powder is 650nm, the radiation spectrum wave band of described blue-light LED chip is 440nm～470nm, and described dark blue-light LED chip and blue-light LED chip are evenly arranged on described substrate with the quantitative proportion of 1:5～1:10; Described phosphor powder layer is yellow, is coated in the upper surface of described dark blue-light LED chip and described blue-light LED chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410095257.XA CN103839935A (en) | 2014-03-14 | 2014-03-14 | Integrated white light LED light source high in color expression capacity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410095257.XA CN103839935A (en) | 2014-03-14 | 2014-03-14 | Integrated white light LED light source high in color expression capacity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103839935A true CN103839935A (en) | 2014-06-04 |
Family
ID=50803281
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410095257.XA Pending CN103839935A (en) | 2014-03-14 | 2014-03-14 | Integrated white light LED light source high in color expression capacity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103839935A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539348A (en) * | 2020-12-09 | 2021-03-23 | 江西鸿利光电有限公司 | Method for realizing high-color-rendering-index LED |
| CN112602489A (en) * | 2020-12-30 | 2021-04-06 | 福建省中科生物股份有限公司 | Bimodal blue light for promoting plant growth |
| CN112664908A (en) * | 2020-12-25 | 2021-04-16 | 广东省科学院半导体研究所 | Method for enhancing specific wavelength intensity of white light LED, light source system and microscope |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629536A (en) * | 2003-12-19 | 2005-06-22 | 安捷伦科技有限公司 | Method and apparatus for producing untainted white light using off-white light emitting diodes |
| CN101855492A (en) * | 2007-11-12 | 2010-10-06 | 三菱化学株式会社 | Lighting system |
| WO2013150470A1 (en) * | 2012-04-06 | 2013-10-10 | Koninklijke Philips N.V. | White light emitting module |
-
2014
- 2014-03-14 CN CN201410095257.XA patent/CN103839935A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1629536A (en) * | 2003-12-19 | 2005-06-22 | 安捷伦科技有限公司 | Method and apparatus for producing untainted white light using off-white light emitting diodes |
| CN101855492A (en) * | 2007-11-12 | 2010-10-06 | 三菱化学株式会社 | Lighting system |
| WO2013150470A1 (en) * | 2012-04-06 | 2013-10-10 | Koninklijke Philips N.V. | White light emitting module |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112539348A (en) * | 2020-12-09 | 2021-03-23 | 江西鸿利光电有限公司 | Method for realizing high-color-rendering-index LED |
| CN112664908A (en) * | 2020-12-25 | 2021-04-16 | 广东省科学院半导体研究所 | Method for enhancing specific wavelength intensity of white light LED, light source system and microscope |
| CN112602489A (en) * | 2020-12-30 | 2021-04-06 | 福建省中科生物股份有限公司 | Bimodal blue light for promoting plant growth |
| CN112602489B (en) * | 2020-12-30 | 2023-08-11 | 福建省中科生物股份有限公司 | Double-peak blue light for promoting plant growth |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2923187C (en) | Enhanced color-preference light sources | |
| CN102265378A (en) | Enhanced color contrast light source at elevated color temperatures | |
| JP2010093237A (en) | System and method for manufacturing light emitting diode back light unit provided with high color reproducibility | |
| CN102244185B (en) | White light LED (light emitting diode) with high color rendering index, high light efficiency and low color temperature and preparation method thereof | |
| CN103779346A (en) | Near ultraviolet or ultraviolet excited LED light-emitting device | |
| TW201011942A (en) | Method and system for configuring high CRI LED | |
| CN107369742B (en) | A kind of high S/P value white light LEDs of high color rendering index (CRI) and its preparation method and application | |
| CN204387966U (en) | A kind of lighting device and comprise the light fixture of this lighting device | |
| WO2011143907A1 (en) | Led light source module and method for improving color rendering index of led light source module | |
| He et al. | A model for LED spectra at different drive currents | |
| CN101872825A (en) | Novel method for preparing high-power white LED with low color temperature and high color rendering property | |
| WO2016039817A1 (en) | Enhanced color-preference led light sources using silicate, nitride, and pfs phosphors | |
| CN104633545B (en) | Height is aobvious to refer to LED lamp and its design method | |
| CN206708776U (en) | A kind of light source module group and the lighting device including the light source module group | |
| CN106931332A (en) | A kind of light source module and the lighting device including the light source module | |
| CN207009473U (en) | A kind of high saturation light source of anti-blue light | |
| CN207146291U (en) | A kind of light source module group and the lighting device including the light source module group | |
| CN101866911A (en) | Structure of light-emitting diode with high color rendering index | |
| CN103839935A (en) | Integrated white light LED light source high in color expression capacity | |
| CN204648124U (en) | A kind of ultraviolet LED lamp | |
| WO2020220669A1 (en) | Novel light emitting lamp bead and lamp | |
| CN206708775U (en) | A kind of light source module group and the lighting device including the light source module group | |
| CN109929554B (en) | Boron phosphate green fluorescent powder and preparation method and application thereof | |
| CN109437561B (en) | Fluorescent glass material and preparation method thereof, lampshade and lamp | |
| Loan et al. | The application of double-layer remote phosphor structures in increasing WLEDs color rendering index and lumen output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20160217 Address after: Baolong Baolong Industrial City Longgang District of Shenzhen city road six beneficial Guangdong Tatsu 518116 Science Park building seven Applicant after: SHENZHEN SHIYIDA LIGHTING CO., LTD. Address before: 214028 No. 92, Lijiang Road, national hi tech Industrial Development Zone, Jiangsu, Wuxi, China Applicant before: Wuxi Sea Star Electronics Co., Ltd. |
|
| CB02 | Change of applicant information |
Address after: Baolong Baolong Industrial City Longgang District of Shenzhen city road six beneficial Guangdong Tatsu 518116 Science Park building seven Applicant after: Shenzhen Sea Star Technology Limited by Share Ltd Address before: Baolong Baolong Industrial City Longgang District of Shenzhen city road six beneficial Guangdong Tatsu 518116 Science Park building seven Applicant before: SHENZHEN SHIYIDA LIGHTING CO., LTD. |
|
| COR | Change of bibliographic data | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140604 |
|
| WD01 | Invention patent application deemed withdrawn after publication |