CN102723421A - Wavelength conversion apparatus and luminous apparatus - Google Patents
Wavelength conversion apparatus and luminous apparatus Download PDFInfo
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- CN102723421A CN102723421A CN2012100210335A CN201210021033A CN102723421A CN 102723421 A CN102723421 A CN 102723421A CN 2012100210335 A CN2012100210335 A CN 2012100210335A CN 201210021033 A CN201210021033 A CN 201210021033A CN 102723421 A CN102723421 A CN 102723421A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 73
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Abstract
The invention provides a wavelength conversion apparatus. The wavelength conversion apparatus comprises a wavelength conversion layer, a reflecting layer and a light distribution transformation layer, wherein the wavelength conversion layer comprises a first surface and second surface which are opposite to each other; the reflecting layer is located on one side of the first surface of the wavelength conversion layer and reflects stimulated light; the light distribution transformation layer is located on one side of the second surface of the wavelength conversion layer. The light distribution transformation layer comprises a plane and a microstructure surface which are opposite to each other. The plane faces the second surface of the wavelength conversion layer. The microstructure surface comprises a plurality of microstructure units. The shape of the microstructure unit is a pyramid or a cone. The invention also provides a luminous apparatus which comprises the wavelength conversion apparatus and an excitation light source emitting the excitation light. In the wavelength conversion apparatus and the luminous apparatus of the invention, the light distribution transformation layer is used to reflect the small-angle light, and propagation and scattering of the light between the light distribution transformation layer and the reflecting layer are used to realize compression of the angel the light emitted by the wavelength conversion layer so as to reduce an optical extended amount of luminescence.
Description
Technical field
The present invention relates to optical field, particularly relate to Wavelength converter and light-emitting device.
Background technology
At present, semiconductor light source has more and more received people's attention.Especially in field of projection display,, therefore very urgent to the demand of long-life light source owing to have only 3000 hours the useful life of conventional bulb.
Present solution has two kinds.First kind is directly to use light-emitting diode (LED, light emitting diode) as monochromatic source, and another kind is to excite a Wavelength converter to produce versicolor Stimulated Light by the use blue-ray LED that United States Patent (USP) 7547114 is disclosed.Both problems all are the luminance shortage of LED, and this mainly is because the light-emitting area of single LEDs is too big, makes that the optical extend of LED emitted light beams is excessive.Certainly, the latter can use blue laser as excitation source, but the cost of blue laser is higher, and useful life is more much lower than LED.
Therefore, need a kind of Wavelength converter, can when producing Stimulated Light, realize reducing of optical extend.
Summary of the invention
The technical problem underlying that the present invention solves is to propose a kind of Wavelength converter, can when producing Stimulated Light, realize reducing of optical extend.
The present invention proposes a kind of Wavelength converter, comprises being used to the wavelength conversion layer that absorbs exciting light and launch Stimulated Light, and this wavelength conversion layer comprises opposite first and second surface; Comprise the reflector that is positioned at wavelength conversion layer first surface one side, the said Stimulated Light of this reflective layer reflects; Also comprise the light distribution transformation layer that is positioned at wavelength conversion layer second surface one side, this light distribution transformation layer comprises relative plane and micro-structural face, and this plane is towards the second surface of wavelength conversion layer.Wherein comprise a plurality of microstructure units on the micro-structural face, the shape of microstructure unit is pyramid or circular cone.
The present invention also proposes a kind of light-emitting device; The excitation source that comprises above-mentioned Wavelength converter and emission exciting light; Exciting light is incident in the wavelength conversion layer of Wavelength converter from a side in the reflector of Wavelength converter, or exciting light is incident in the wavelength conversion layer of Wavelength converter from a side of the light distribution transformation layer of Wavelength converter.
In Wavelength converter of the present invention and light-emitting device; Utilize of reflection and these light propagation and the scattering light distribution transformation layer and reflector between of light distribution transformation layer to low-angle light; The compression of the angle of the light of having realized wavelength conversion layer is sent, and then reduced luminous optical extend.
Description of drawings
Fig. 1 a is the sketch map of the first embodiment of the present invention;
Fig. 1 b is the vertical view of the light distribution transformation layer of the first embodiment of the present invention;
Fig. 1 c is the operation principle sketch map of the first embodiment of the present invention;
Fig. 2 a and 2b are other two kinds of possible microstructure unit shapes of the light distribution transformation layer of the first embodiment of the present invention;
Fig. 3 is the vertical view of the light distribution transformation layer of microstructure unit when being circular cone;
Fig. 4 a is the sketch map of the second embodiment of the present invention;
Fig. 4 b is the vertical view of the wavelength conversion layer of second embodiment of the invention;
Fig. 5 is a sketch map of giving an example of second embodiment of the invention;
Fig. 6 is the vertical view of the light distribution transformation layer of microstructure unit when being the one dimension prism.
Embodiment
The structure of the first embodiment of the present invention is shown in Fig. 1 a.Wavelength converter 100 comprises and is used to the wavelength conversion layer 101 that absorbs exciting light 111 and launch Stimulated Light 121 that this wavelength conversion layer 101 comprises opposite first 101a and second surface 101b; Also comprise the reflector 103 that is positioned at wavelength conversion layer first surface 101a one side, these reflector 103 reflection Stimulated Light; Also comprise the light distribution transformation layer 105 that is positioned at wavelength conversion layer second surface 101b one side; This light distribution transformation layer 105 comprises relative plane 105b and micro-structural face 105a; This plane 105b is towards the second surface 101b of wavelength conversion layer, and comprises a plurality of microstructure unit 105a1 on the micro-structural face 105a.
Light distribution transformation layer uses transparent material to be made, for example glass or transparent organic material.In the present embodiment, the shape of each microstructure unit all is a rectangular pyramid; If use transparent organic material such as epoxy resin to make this light distribution transformation layer, then can use the method for mold injection to obtain the micro-structural of the micro-structural face of light distribution transformation layer.
In the present embodiment, microstructure unit 105a1 is on micro-structural face 105a and periodically arranges; The vertical view of micro-structural face is shown in Fig. 1 b.The benefit that this periodicity is arranged is that its repeatability makes processing and fabricating more convenient, and cost is lower.
Operation principle with regard to the Wavelength converter of present embodiment describes below.
Shown in Fig. 1 c, wavelength conversion layer 101 stimulated luminescences are isotropism, and the light 122 that wherein sends from first surface 101a is incident in the surperficial 103a in reflector 103.In this embodiment, reflector 103 is interferometric filters.Interferometric filter is exactly plating low-refraction and the high refractive index film that uses the method for sputter to replace in lens substrate surface, and its transmission exciting light 111 reflects Stimulated Light 122 simultaneously in the present embodiment.As preferred embodiment, the plated film face of interferometric filter is towards the first surface 101a of wavelength conversion layer.Therefore, Stimulated Light 122 is reflected back toward wavelength conversion layer after inciding surface, reflector 103a.Be appreciated that the existence owing to the reflector, this part light finally can be from wavelength conversion layer second surface 101b outgoing.
From the Stimulated Light of the second surface 101b outgoing of wavelength conversion layer according to angle different be divided into three parts of outgoing in wavelength conversion layer; The light of shooting angle minimum is shown in 123 among the figure, and meeting on two inwalls of the microstructure unit 105a1 of the micro-structural face of light distribution transformation layer 105 total reflection takes place and is back to wavelength conversion layer 101; The maximum light of shooting angle can outgoing from a microstructure unit 105a1 shown in 124 among the figure, and is incident among another microstructure unit 105a2 that is adjacent and generation total reflection and be back to wavelength conversion layer 101 on an one of which inwall; The marginal light of shooting angle in figure shown in 125, can pass through the refraction on a surface of microstructure unit after, form the outgoing of low-angle light.
Therefore, from the light of the second surface 101b outgoing of wavelength conversion layer some with the low-angle outgoing, all the other then are reflected back toward wavelength conversion layer.This part light that is reflected can be by wavelength conversion layer 101 scatterings and reflection, layer 103 reflection that also can be reflected, and be incident in once more on the light distribution transformation layer 105, a part of light wherein can be with the low-angle outgoing, and all the other light then are reflected once more.So repeatedly after the circulation, final most of Stimulated Light can space outerpace with low-angle outgoing and light distribution transformation layer in.
In sum, because light distribution transformation layer, makes that most of energy is with the low-angle outgoing in the Stimulated Light that wavelength conversion layer sends to the optionally reflex and the propagation and the scattering of light between light distribution transformation layer and reflector of light; Compare with isotropic light beam that wavelength conversion layer self sends, the optical extend of the light that this Wavelength converter sends is littler, so brightness is higher.
In the present embodiment; Microstructure unit on light distribution transformation layer direction in two dimension on the micro-structural face is periodically expanded; In fact can find out according to Fig. 1 c and above-mentioned description; If each microstructure unit is that its cross sectional shape is a triangle along the structure of the one dimension extension of first direction, a plurality of microstructure units edge second direction vertical with first direction periodically expanded simultaneously; As shown in Figure 6, also can realize the compression of beam angle and reducing of corresponding optical extend this moment.But; Its problem is that the compression of its lighting angle can only carry out on second direction; Because the pattern along the first direction microstructured layers does not have variation so the angle of light beam on this direction can not reflect change, promptly still on second direction, keeps isotropic distribution.In addition, if light distribution transformation layer shown in Figure 6 is used and following the second and the 3rd embodiment that will describe, this moment, the direction of beam angle compression can change along with the rotation of drive unit, and therefore optical extend can't reduce on average.
In the present embodiment, the shape of microstructure unit is a rectangular pyramid.In fact combine foregoing description to be appreciated that microstructure unit also can be other structures.What Fig. 2 a represented is the vertical view of the microstructure unit of positive hexagonal pyramid shape, and what Fig. 2 b represented is the vertical view of the microstructure unit of triangular pyramid shape.Can know that according to simple geometric knowledge positive triangular pyramid, positive rectangular pyramid, positive hexagonal pyramid all are can be periodically compact arranged; In fact, can there be the space between the adjacent microstructures unit.
Fig. 3 shows is to be the part of vertical view of the light distribution transformation layer of microstructure unit with the circular cone, though visible each microstructure unit try one's best near, also can have the gap.Total reflection not taking place and directly outgoing at this gap location light, therefore can influence the effect of this light distribution transformation layer.Yet consider that the shared ratio in this gap is very little, so this light distribution transformation layer still there is the effect that significantly reduces optical extend.Be appreciated that thus; Also can use can not compact arranged microstructure unit; Pentagonal pyramid for example can compact arranged microstructure unit even perhaps use, and also can allow to exist between adjacent two microstructure units certain clearance to reduce the difficulty of processing.
In the superincumbent description, each possible microstructure unit all has a pointed end, and in fact this exist difficulty in processing.Be appreciated that the fillet that makes this pointed end become a cambered surface can reduce difficulty of processing and processing cost significantly.Similar, also can this pointed end be scabbled, promptly become a little flat-top, for example a conical microstructure unit becomes truncated cone, so also can reduce difficulty of processing.Because the shared area of the fillet on top or flat-top is very little, so for the performance impact of light distribution transformation layer and little.Therefore, this top microstructure unit of pyramid or circular cone that becomes the cambered surface fillet or be whittled into flat-top is also in protection scope of the present invention.
In the present embodiment, preferred, wavelength conversion layer 101 next-door neighbour reflector 103, and have air-gap between the two; It is simpler that wherein the effect of air-gap is to make the design of interference filter plated film in reflector 103, and processing cost is lower.Preferred in addition, wavelength conversion layer tight 101 adjacent light distribution transformation layers 105, and have air-gap between the two; The effect of this air-gap is that the Stimulated Light that wavelength conversion layer is sent incides and refraction takes place behind the plane 105b of light distribution transformation layer and angle diminishes that this helps the realization of the beneficial effect of light distribution transformation layer the experiment proof.
In the present embodiment, a side of 111 is incident in wavelength conversion layer to exciting light 111 from the reflector; In fact, the side that exciting light can also light distribution transformation layer is incident on the wavelength conversion layer; Preferably, exciting light is incident on the light distribution transformation layer with low-angle, and this moment, exciting light was higher through the efficient of light distribution transformation layer.Preferably, this moment, exciting light was also reflected in the reflector, made the residual excitation light that is not absorbed by wavelength conversion layer reflect back into the second use that wavelength conversion layer is realized this part exciting light once more.This moment Stimulated Light still from a side of light distribution transformation layer with the low-angle outgoing, this does not influence beneficial effect of the present invention.It is understandable that,, need beam split filter of use utilize exciting light both light paths to be separated with the difference of wavelength of Stimulated Light because this moment, exciting light and Stimulated Light were positioned at same light path; This is a prior art, does not give unnecessary details here.
The structure of the second embodiment of the present invention is shown in Fig. 4 a.Different with first embodiment is that in this Wavelength converter 400, wavelength conversion layer 401, reflector 403 and light distribution transformation layer 405 are mutually permanently connected; And also comprise drive unit 409 in this Wavelength converter 400, be used to drive wavelength conversion layer 401 and carry out cycle movement.
In the present embodiment, drive unit 409 is motors of a rotation, and the motor revolving shaft of this motor is fixedly connected with reflector 403, and drive wavelength conversion layer 401, reflector 403 and light distribution transformation layer 405 rotate with the axle center of this motor drive shaft together.In rotation process, exciting light 411 incidents and wavelength conversion layer, the Stimulated Light 421 that wavelength conversion layer sends penetrates with low-angle.Because during wavelength conversion layer is kept in motion all the time; Therefore each local material for transformation of wave length not can owing to exciting light continue excite and overheated generation thermal quenching phenomenon, this has effectively guaranteed the operate as normal of this Wavelength converter 400 under high-power exciting light.
Be appreciated that this motor 409 also can drive wavelength conversion layer 401, reflector 403 and 405 rotation of light distribution transformation layer with 405 fixed connection of light distribution transformation layer.It is understandable that equally drive unit also can be the motor of straight reciprocating motion campaign.This does not influence the realization of beneficial effect of the present invention.
In the present embodiment, wavelength conversion layer 401 comprises three zones, and the vertical view of this wavelength conversion layer 401 is shown in Fig. 4 b.Wherein regional 401a comprises the red wavelength transition material, and regional 401b comprises the green wavelength transition material, and regional 401c comprises the blue wavelength transition material, and these three zones are along the cycle movement direction of wavelength conversion layer, and promptly circumferencial direction is arranged.Like this when exciting light 411 is ultraviolet light, along with the rotation of drive unit 411, zones of different periodically is excited light 411 irradiations successively and produces the primary lights of three kinds of colors of red, green, blue.This light source can be applied in the middle of the Projection Display.
It is understandable that, have two zones on the wavelength conversion layer 401 at least, just can alternately produce the output of different colours light.
In the present embodiment, if use blue light as exciting light 411, then regional 401c does not comprise material for transformation of wave length but directly uses exciting light to export as blue light.Preferably; Zone 401c comprises diffusion material; This is used for the light of exciting light distributed and is diffused as the Stimulated Light light that more approaches other regional material for transformation of wave length and distributes, and helps making peace and finally project the raising of the color homogeneity on the screen of collection efficiency of shades of colour light like this; For exciting light is the situation of blue laser, this coherence who helps to eliminate exciting light with and the spot that on projection screen, produces.
Further; As shown in Figure 5; If use blue light as exciting light, then blue region 501c does not comprise material for transformation of wave length, and the microstructure unit on this time distribution transformation layer does not just have necessity of existence; Therefore on the micro-structural face of light distribution transformation layer 505 with the corresponding zone of blue region 501c on, be plane and do not have microstructure unit
The present invention also proposes a kind of light-emitting device; The excitation source that comprises above-mentioned Wavelength converter and emission exciting light; Exciting light is incident in the wavelength conversion layer of Wavelength converter from a side in the reflector of Wavelength converter, or exciting light is incident in the wavelength conversion layer of Wavelength converter from a side of the light distribution transformation layer of Wavelength converter.
The above is merely embodiments of the invention; Be not so limit claim of the present invention; Every equivalent structure or equivalent flow process conversion that utilizes specification of the present invention and accompanying drawing content to be done; Or directly or indirectly be used in other relevant technical fields, all in like manner be included in the scope of patent protection of the present invention.
Claims (11)
1. a Wavelength converter is characterized in that, comprising:
Be used to the wavelength conversion layer that absorbs exciting light and launch Stimulated Light, this wavelength conversion layer comprises opposite first and second surface;
Be positioned at the reflector of wavelength conversion layer first surface one side, the said Stimulated Light of this reflective layer reflects;
Be positioned at the light distribution transformation layer of wavelength conversion layer second surface one side, this light distribution transformation layer comprises relative plane and micro-structural face, and this plane is towards the second surface of said wavelength conversion layer;
Comprise a plurality of microstructure units on the said micro-structural face, the shape of this microstructure unit is pyramid or circular cone.
2. Wavelength converter according to claim 1 is characterized in that, said microstructure unit is on said micro-structural face periodically arranges.
3. Wavelength converter according to claim 1 is characterized in that said reflector is an interferometric filter, and this interferometric filter reflects said Stimulated Light and the said exciting light of transmission.
4. Wavelength converter according to claim 1 is characterized in that said wavelength conversion layer is close to said reflector, and has air-gap between the two.
5. Wavelength converter according to claim 1 is characterized in that, said wavelength conversion layer is close to said smooth distribution transformation layer, and has air-gap between the two.
6. Wavelength converter according to claim 1 is characterized in that, the shape of said microstructure unit is triangular pyramid or rectangular pyramid or hexagonal pyramid.
7. Wavelength converter according to claim 1 is characterized in that, said wavelength conversion layer, reflector and light distribution transformation layer are mutually permanently connected;
Also comprise drive unit, be used to drive wavelength conversion layer and carry out cycle movement.
8. Wavelength converter according to claim 7; It is characterized in that; Said wavelength conversion layer comprises at least two zones, and wherein at least one zone comprises first material for transformation of wave length, and at least one zone comprises second material for transformation of wave length or do not comprise material for transformation of wave length;
Arrange along the cycle movement direction of wavelength conversion layer in these at least two zones.
9. Wavelength converter according to claim 8 is characterized in that, does not comprise that the zone of material for transformation of wave length comprises diffusion material.
10. Wavelength converter according to claim 8 is characterized in that, does not comprise on the regional corresponding zone of material for transformation of wave length on the micro-structural face of light distribution transformation layer with on the wavelength conversion layer, is plane and do not have said microstructure unit.
11. a light-emitting device is characterized in that, comprising:
According to any described Wavelength converter in the claim 1 to 10;
The excitation source of emission exciting light; Said exciting light is incident in the wavelength conversion layer of Wavelength converter from a side in the reflector of Wavelength converter, or said exciting light is incident in the wavelength conversion layer of Wavelength converter from a side of the light distribution transformation layer of Wavelength converter.
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| CN201210021033.5A CN102723421B (en) | 2012-01-30 | 2012-01-30 | Wavelength conversion apparatus and luminous apparatus |
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| CN201210021033.5A CN102723421B (en) | 2012-01-30 | 2012-01-30 | Wavelength conversion apparatus and luminous apparatus |
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| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
| CN109870873A (en) * | 2017-12-05 | 2019-06-11 | 青岛海信激光显示股份有限公司 | A kind of Wavelength converter, light supply apparatus and optical projection system |
| CN110543016A (en) * | 2018-05-31 | 2019-12-06 | 深圳疆程技术有限公司 | Head-up display based on laser light source |
| CN112820803A (en) * | 2019-11-15 | 2021-05-18 | 深圳市聚飞光学材料有限公司 | Brightness enhancement film, manufacturing method thereof and light-emitting device |
| CN113054084A (en) * | 2019-12-26 | 2021-06-29 | 台达电子工业股份有限公司 | Wavelength conversion element |
| US11405597B2 (en) | 2019-01-15 | 2022-08-02 | Coretronic Corporation | Illumination system and projection device |
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| CN103777447A (en) * | 2012-10-17 | 2014-05-07 | 深圳市绎立锐光科技开发有限公司 | Light source system, wavelength conversion device and relevant projection system |
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| US11405597B2 (en) | 2019-01-15 | 2022-08-02 | Coretronic Corporation | Illumination system and projection device |
| CN112820803A (en) * | 2019-11-15 | 2021-05-18 | 深圳市聚飞光学材料有限公司 | Brightness enhancement film, manufacturing method thereof and light-emitting device |
| CN113054084A (en) * | 2019-12-26 | 2021-06-29 | 台达电子工业股份有限公司 | Wavelength conversion element |
| US11306898B2 (en) | 2019-12-26 | 2022-04-19 | Delta Electronics, Inc. | Wavelength conversion element |
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| CN102723421B (en) | 2014-12-10 |
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Denomination of invention: Wavelength conversion device and luminous device Effective date of registration: 20161010 Granted publication date: 20141210 Pledgee: Bank of Jiangsu Limited by Share Ltd. Shenzhen branch Pledgor: APPOTRONICS Corp.,Ltd. Registration number: 2016440020008 |
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| PLDC | Enforcement, change and cancellation of contracts on pledge of patent right or utility model | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20171225 Granted publication date: 20141210 Pledgee: Bank of Jiangsu Limited by Share Ltd. Shenzhen branch Pledgor: APPOTRONICS Corp.,Ltd. Registration number: 2016440020008 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
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Denomination of invention: Wavelength conversion device and luminous device Effective date of registration: 20180105 Granted publication date: 20141210 Pledgee: Bank of Jiangsu Limited by Share Ltd. Shenzhen branch Pledgor: APPOTRONICS Corp.,Ltd. Registration number: 2018440020003 |
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| CP01 | Change in the name or title of a patent holder | ||
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: APPOTRONICS Corp.,Ltd. Address before: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee before: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. |
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| CP03 | Change of name, title or address | ||
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Address after: 518000 20-22, 20-22 headquarters building, 63 high tech Zone, Xuefu Road, Nanshan District, Guangdong Province, Guangdong. Patentee after: SHENZHEN GUANGFENG TECHNOLOGY Co.,Ltd. Address before: 518057 Guangfeng Photoelectric Technology Co., Ltd. on the third floor of Fangda Building, Nanshan Science Park, Shenzhen City, Guangdong Province Patentee before: APPOTRONICS Corp.,Ltd. |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20190319 Granted publication date: 20141210 Pledgee: Bank of Jiangsu Limited by Share Ltd. Shenzhen branch Pledgor: APPOTRONICS Corp.,Ltd. Registration number: 2018440020003 |
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| PM01 | Change of the registration of the contract for pledge of patent right | ||
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Change date: 20190318 Registration number: 2018440020003 Pledgor after: APPOTRONICS Corp.,Ltd. Pledgor before: APPOTRONICS Corp.,Ltd. |