CN213900764U - Wavelength conversion device with selective transmission device, light-emitting device and lamp - Google Patents
Wavelength conversion device with selective transmission device, light-emitting device and lamp Download PDFInfo
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- CN213900764U CN213900764U CN202023079314.5U CN202023079314U CN213900764U CN 213900764 U CN213900764 U CN 213900764U CN 202023079314 U CN202023079314 U CN 202023079314U CN 213900764 U CN213900764 U CN 213900764U
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 32
- 230000005540 biological transmission Effects 0.000 title claims abstract description 22
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- 230000003287 optical effect Effects 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims description 39
- 239000010410 layer Substances 0.000 claims description 36
- 239000011247 coating layer Substances 0.000 claims description 16
- 238000002834 transmittance Methods 0.000 claims description 12
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 9
- 229910052594 sapphire Inorganic materials 0.000 claims description 3
- 239000010980 sapphire Substances 0.000 claims description 3
- 238000009877 rendering Methods 0.000 abstract description 5
- 241001465382 Physalis alkekengi Species 0.000 abstract 1
- 230000006872 improvement Effects 0.000 description 8
- 238000005286 illumination Methods 0.000 description 5
- 230000005284 excitation Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000007888 film coating Substances 0.000 description 3
- 238000009501 film coating Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
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- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses wavelength conversion device and illuminator and lamps and lanterns with selective permeation device, including transparent heat conduction's basement, basement one side is provided with fluorescent material, one side that fluorescent material kept away from the basement covers there is the light filter, light filter transmission fluorescence, reflection part laser and transmission part laser. According to the technical scheme, part of laser can not be directly emitted through the optical filter, and the part of laser re-excites the fluorescent material, so that the laser component in the mixed light is reduced, and the purpose of controlling the color temperature of the mixed light is achieved; the fluorescent material comprises a yellow-green fluorescent material layer and an orange-red fluorescent material layer, and the mixed light component comprises laser, yellow-green fluorescence and orange-red fluorescence, so that the color rendering index is enhanced, and the wavelength width range of the mixed light is enlarged.
Description
Technical Field
The utility model belongs to the technical field of the lighting technology and specifically relates to, relate to wavelength conversion device with selective permeation device.
Background
The technology of laser used in the illumination field is mature day by day, and laser illumination generally adopts a laser light-emitting device to excite a wavelength conversion device to generate fluorescence, and the laser and the fluorescence are emitted together to form white light required by illumination. In the technical scheme of obtaining white light by exciting a fluorescent material by laser, using the fluorescent material to emit fluorescence, and mixing the fluorescence with laser of a non-excited fluorescent material, when the color temperature is controlled, the laser component of mixed light is generally controlled by controlling the thickness of the fluorescent material, the thicker the fluorescent material is, the higher the proportion of the laser-excited fluorescent material is, the less the component of the laser in the mixed light is, the thinner the fluorescent material is, the smaller the proportion of the laser-excited fluorescent material is, and the larger the component of the laser in the mixed light is. Secondly, the fluorescent material is thick enough to reduce the emission of fluorescence and laser, which affects the illumination intensity.
The white light synthesized by the fluorescence obtained by exciting the fluorescent material of another color by the laser of one color and the laser has narrow wavelength width and low color rendering index.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the shortcomings of the conventional technologies, and aims at overcoming the shortcomings of the prior art, the wavelength conversion device with the selective transmission device is provided.
In order to solve the above problems, the utility model adopts the following technical scheme: the wavelength conversion device with the selective transmission device comprises a transparent heat-conducting substrate, wherein a fluorescent material is arranged on one side of the substrate, an optical filter covers one side, far away from the substrate, of the fluorescent material, and the optical filter transmits fluorescence, reflects part of laser and transmits part of laser.
As an improvement of the technical scheme: the optical filter comprises a coating layer, and one surface of the optical filter, which is provided with the coating layer, is close to the fluorescent material.
As an improvement of the technical scheme: the optical filter is closely attached to the fluorescent material, and an air gap is formed between the optical filter and the fluorescent material.
As an improvement of the technical scheme: the fluorescent material comprises a white scattering medium therein.
As an improvement of the technical scheme: the phosphor material includes a first phosphor layer and a second phosphor layer.
As an improvement of the technical scheme: the first fluorescent material layer is made of a yellow-green fluorescent material, and the second fluorescent material layer is made of an orange-red fluorescent material; the first fluorescent material layer is disposed between the second fluorescent material layer and the substrate.
As an improvement of the technical scheme: the substrate material is sapphire.
As an improvement of the technical scheme: the wavelength conversion device comprises a wavelength conversion device with a selective transmission device and a laser light source, wherein the laser light source emits laser which excites the wavelength conversion device with the selective transmission device to emit mixed light.
As an improvement of the technical scheme: the transmittance of the laser light through the substrate and the fluorescent material is T1The transmittance of the filter to the laser light is T2Wherein 20% < T1＜50％，30％＜T2＜60％。
Due to the adoption of the technical scheme, compared with the prior art, the technical scheme has the advantages that part of laser can not be directly emitted through the optical filter, and the part of laser re-excites the fluorescent material, so that the laser component in the mixed light is reduced, and the purpose of controlling the color temperature of the mixed light is achieved;
the fluorescent material comprises a yellow-green fluorescent material layer and an orange-red fluorescent material layer, and the mixed light component comprises laser, yellow-green fluorescence and orange-red fluorescence, so that the color rendering index is enhanced, and the wavelength width range of the mixed light is enlarged.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic view of a wavelength conversion device having a selective transmission device.
Fig. 2 is an optical path diagram of a wavelength conversion device having a selective transmission device.
FIG. 3 is a schematic diagram of the position of the coating layer.
Fig. 4 is a schematic structural view of a fluorescent material.
Detailed Description
Example (b):
the color temperature of the light exiting the existing wavelength conversion device depends on the ratio of fluorescent light and light not exciting the wavelength conversion device. If one wants to reduce the color temperature of the emitted light, the light that does not excite the wavelength conversion device is usually reduced by increasing the thickness of the fluorescent material.
As shown in fig. 1, the wavelength conversion device with a selective transmission device includes a transparent heat-conducting substrate 101, in the present technical solution, the substrate 101 has high transmittance and heat-conducting performance, which can meet the use requirement, and a preferred embodiment is that the substrate 101 is made of sapphire, which has the characteristics of strong light transmittance and strong heat-conducting capability, and has the same transmittance for light of all wavelengths, and no color difference occurs. The fluorescent material 103 is disposed on one side of the substrate 101, and the fluorescent material 103 is usually fixed on the surface of the substrate 101 by coating or bonding, and this embodiment shows an embodiment in which the fluorescent material 103 is disposed on one side of the substrate 101, so that the same effect can be achieved when the fluorescent material 103 is disposed on both sides of the substrate 101, and in order to save the production cost and shorten the production cycle, the fluorescent material 103 is usually disposed on one side of the substrate 101 in practical production. The reason why the substrate 101 is required to have a high light transmittance in this embodiment is that the fluorescent material 103 is disposed on the substrate 101, the light emitted from the light source is emitted from one side of the substrate 101 and passes through the substrate 101 to excite the fluorescent material 103, and the fluorescent material 103 excited by the light emitted from the light source emits fluorescence, so that the substrate 101 is required to have a high light transmittance. Since the fluorescent material 103 emits lambertian light, in order to prevent the fluorescent light from being emitted to the light source side, a preferred embodiment is that a first film 102 is disposed between the fluorescent material 103 and the substrate 101, and the first film 102 reflects the fluorescent light and transmits the light emitted from the light source. In a specific embodiment, the light source is a laser diode 106 with high energy density and strong collimation, and the light emitted by the laser diode 106 is laser light 121. From the above principle, it is necessary to control the ratio of the fluorescence to the laser light in the mixed light 141 in order to control the color temperature of the mixed light 141 emitted from the wavelength conversion device, and to control the ratio of the fluorescence to the laser light in the mixed light 141 in order to change the ratio of the fluorescence to the laser light without changing the light source, the ratio of the laser light exciting the fluorescent material 103 is necessary to be controlled. The side of the fluorescent material 103 away from the substrate 101 is covered with an optical filter 105, and the optical filter 105 transmits fluorescence, reflects part of laser light and transmits part of laser light. In the technical scheme, the optical filter 105 which reflects part of laser and transmits part of laser is added in the light emitting direction of the mixed light 141, the part of laser reflected by the optical filter 105 returns to the fluorescent material 103 again, the fluorescent material 103 is excited again, the fluorescent material 103 emits fluorescence, the fluorescent component in the mixed light 141 is improved, the laser component is reduced, and the ratio of the fluorescence of the mixed light 141 to the laser is changed. Under the condition that the light source and the requirement on the mixed light 141 are not changed, the fluorescent material 103 can be made thinner, so that the material and production cost are saved, and the phenomenon that the emission of the fluorescent light and the laser light is influenced due to the large thickness of the fluorescent material 103 is avoided.
The laser light emitted from the filter 105 and the fluorescent light are mixed to form a white mixed light 141, the filter 105 changes the laser light component in the mixed light 141, and when the laser light component is changed, the color temperature of the mixed light 141 is changed accordingly. Taking blue laser light to excite a yellow fluorescent material as an example, when the proportion of the blue laser light in the mixed light 141 is reduced, the color temperature of the mixed light 141 is reduced, and when the proportion of the blue laser light in the mixed light 141 is increased, the color temperature of the mixed light 141 is increased.
To introduce the components of the mixed light 141 in the above technical solutions, for example, as shown in fig. 1 and 2, when refraction is not considered, the blue laser light 121 emitted by the light source sequentially passes through the substrate 101 and the first plated layer 102 and reaches the fluorescent material 103, the blue laser light 121 reaches the fluorescent material 103 and is scattered and reflected at the same time, the reflected part of the blue laser light 121 is the fourth laser light 126, and the fourth laser light 126 sequentially passes through the first plated layer 102 and the substrate 101 and then exits; the first laser light 122, the second laser light 123, and the third laser light 124 are formed by scattering. The third laser 124 sequentially passes through the fluorescent material 103, the coating layer 104 and the optical filter 105 and then is emitted, and becomes a part of the mixed light 141; the first laser 122 enters the fluorescent material 103, the fluorescent material 103 is excited by the first laser 122 to emit first fluorescent light 131, and the first fluorescent light 131 sequentially passes through the film coating layer 104 and the optical filter 105 and then exits as part of the mixed light 141; the second laser light 123 does not excite the fluorescent material 103 after passing through the fluorescent material 103, when the second laser light 123 reaches the coating layer 104, the second laser light is reflected back to the fluorescent material 103 by the coating layer 104 and excites the fluorescent material layer 103, the fluorescent material layer 103 excited by the second laser light 123 emits second fluorescent light 132, and the second fluorescent light 132 sequentially passes through the coating layer 104 and the optical filter 105 and then is emitted out of the wavelength conversion device with the selective transmission device to become a part of the mixed light 141; in practical application, part of the second laser light 123 is reflected by the coating layer 104 to form the fifth laser light 127, and the fifth laser light 127 sequentially passes through the fluorescent material 103, the first coating layer 102 and the substrate 101 and then exits in the opposite direction, and cannot become part of the mixed light 141.
Therefore, the fluorescent light component emitted from the same fluorescent material 103 increases after the filter 105 is used, and the fluorescent material 103 can be made thinner in practical use, which is advantageous for emitting laser light and fluorescent light without affecting the color temperature of the mixed light 141.
In the technical scheme, the optical filter 105 has the functions of transmitting fluorescence, reflecting part of laser and transmitting part of laser, and in order to realize the function, a preferable embodiment is that the optical filter 105 comprises a coating layer 104, and one surface of the optical filter 105, which is provided with the coating layer 104, is close to the fluorescent material 103. The addition of the coating layer 104 on the filter 105, which functions to transmit fluorescence, reflect part of the laser light and transmit part of the laser light, may in principle be added on either side, but in order to increase the light intensity during the implementation, the area of the light emitting region of the wavelength conversion device is usually reduced. As shown in fig. 3, in order to prove that the film coating layer 104 is disposed on the side of the optical filter 105 far from the fluorescent material 103, which causes the area of the light emitting region of the wavelength conversion device to increase, an example is given in which, when the reflective layer 104a is disposed on the side of the optical filter 105 near the fluorescent material 103, the first light 123a passes through the fluorescent material 103, is immediately reflected by the first reflective layer 104a, returns to the fluorescent material 103, and excites the fluorescent material 103, and the fluorescent material 103 emits the first excitation light 131a, where the distance from the first light 123a to the first excitation light 131a in the plane direction of the optical filter 105 is a; when the reflecting surface 104B is disposed on the side of the filter 105 far from the fluorescent material 103, the first light 123a enters the filter 105 to become the second light 123B, and when the second light 123B reaches the reflecting surface 104B, is reflected by the reflecting surface 104B, passes through the filter 105, returns to the fluorescent material 103 again, and excites the fluorescent material 103, the fluorescent material 103 emits the second excitation light 131B, and at this time, the distance from the second light 123B to the second excitation light 131B in the plane direction of the filter 105 is B, which is obviously indicated as B > a in the figure.
Since the coating layer 104 is disposed on the side of the filter 105 close to the fluorescent material 103, light is reflected between the coating layer 104 and the fluorescent material 103, and light entering the filter 105 cannot be emitted from the filter 105 once it is totally reflected in the filter 105. In a preferred embodiment, the filter 105 is closely attached to the fluorescent material 103, and an air gap is formed between the filter 105 and the fluorescent material 103. Refraction occurs between the film coating layer 104 and the fluorescent material 103, so that the optical filter 105 and the fluorescent material 103 are tightly attached to each other in order to avoid overlarge area of a light emitting region of the wavelength conversion device caused by the refraction; as can be seen from the optical principle, when a beam of light passes from a medium with a small refractive index to a medium with a large refractive index, the beam of light is totally reflected in the medium with the large refractive index, and the beam of light cannot exit from the medium with the large refractive index. In order to prevent light entering the filter 105 from being unable to exit, an air gap is provided between the fluorescent material 103 and the filter 105.
The laser light is incident into the fluorescent material 103 in order to excite the fluorescent material 103, and the amount of the laser light exciting the fluorescent material 103 determines the utilization rate of the laser light. Secondly, since the collimation of the laser light is high, the uniformity of the fluorescence emitted from the fluorescent material 103 excited by the laser light is not good. In a preferred embodiment, a white scattering medium is included in the fluorescent material 103. Laser enters the fluorescent material 103, and after the white scattering medium scatters the laser, the laser excites the fluorescent material 103 more sufficiently, so that the utilization rate of the laser is improved. Secondly, the fluorescence emitted by the fluorescent material 103 after being excited by the laser is also scattered by the white scattering medium, the uniformity of the fluorescence and the laser in the mixed light 141 is good, and the illumination effect of the mixed light 141 is obviously improved.
Since the fluorescent material 103 is generally in a granular shape, the granular fluorescent material 103 has a certain thickness, and the fluorescent material 103 is coated or adhered, the fluorescent material 103 far from the substrate 101 cannot be firmly adhered to the substrate 101, as shown in fig. 4, in a preferred embodiment, the fluorescent material 103 includes a first fluorescent material layer 103a and a second fluorescent material layer 103 b. After the first fluorescent material layer 103a and the second fluorescent material layer 103b are bonded into a whole, the first fluorescent material layer 103a and the second fluorescent material layer 103b are bonded to the substrate 101, and the bonding mode prevents the fluorescent material 103 from falling off from the substrate 101 due to poor bonding.
In the conventional light emitting device, a yellow fluorescent material is generally excited by a blue laser, the excited yellow fluorescent material emits yellow fluorescence, the yellow fluorescence and a blue laser which does not excite the yellow fluorescent material are simultaneously emitted to form a white mixed light 141, only blue light and yellow light in the mixed light 141 are synthesized, and the color rendering index is low and the color reproduction degree is low. In a preferred embodiment, the first fluorescent material layer 103a is composed of a yellow-green fluorescent material, and the second fluorescent material layer 103b is composed of an orange-red fluorescent material; the first fluorescent material layer 103a is disposed between the second fluorescent material layer 103b and the substrate 101. In the embodiment, the orange-red fluorescent material is added, the excited orange-red fluorescent material emits orange-red fluorescence, the orange-red fluorescence is added in the mixed light 141, the color rendering index is obviously improved, and the color reduction degree is obviously improved. According to the optical principle, the blue light wavelength is shortest, the red light wavelength is longest, and the yellow light wavelength is between the red light wavelength and the blue light wavelength, in the technical scheme, the laser diode 106 emits the blue laser 121, the blue light wavelength is shortest, the difficulty of directly exciting the orange-red fluorescent material by using the blue light wavelength with the shortest wavelength is higher, and the conversion rate is lower. In practice, therefore, the first fluorescent material layer 103a is attached to the substrate 101, and the second fluorescent material layer 103b is attached to the side of the first fluorescent material layer 103a away from the substrate 101.
As shown in fig. 1, the laser light source is a laser diode 106, the laser diode 106 emits a blue laser beam 121, and the blue laser beam 121 excites a wavelength conversion device having a selective transmission device to emit a mixed light 141.
When the color temperature of the mixed light 141 emitted by the wavelength conversion device with the selective transmission device is controlled, the proportion of the blue laser light 121 in the mixed light 141 needs to be controlled, and when the blue laser light 121 enters the mixed light 141, the blue laser light needs to transmit the substrate 101, the fluorescent material 105 and the optical filter 105, the transmittance of the blue laser light 121 through the substrate 101, the fluorescent material 105 and the optical filter 105 is particularly important, and a preferable mode is that the transmittance of the blue laser light 121 through the substrate 101 and the fluorescent material 103 is T1The transmittance of the filter 105 for the blue laser light 121 is T2Wherein 20% < T1＜50％，30％＜T2Is less than 60 percent. According to the actual requirement, when T is1*T2Between 10% and 30%, a relatively appropriate color temperature can be obtained. Since the filter 105 is partially transmissive and partially reflective to the laser light, when T is2When 50%, T1The control is required to be between 30 and 60 percent. Let T be140%. That is, 40% of the blue laser light 121 is transmitted to the filter 105 after being incident on the fluorescent material 103, because of T2At 50%, the filter 105 reflects half of the blue laser light 121 back to the phosphor material 103, and 40% of the reflected blue laser light 121 passes through the phosphor material 103 and the substrate 101, and the blue laser light 121 is lost, i.e., (40% by 50%) by 40% to 8%.
It can be seen that T1The phosphor material 103 becomes thinner and the thermal conductivity is improved when it becomes larger, while T is increased1Become large to result in T2Since the loss of the reflected blue laser light 121 is increased while decreasing, T in the present embodiment is increased1And T2The optimized value range of (1) is more than 20% < T1＜50％，30％＜T2＜60％。
The above detailed description of the embodiments of the present invention is the best mode for carrying out the present invention, and can not be used to limit the protection scope of the present invention. Any equivalent modifications and substitutions for the utility model are within the scope of the protection of the present invention for those skilled in the art.
Claims (9)
1. Wavelength conversion device with selective transmission device, including transparent heat conduction's base, base one side is provided with fluorescent material, its characterized in that: the side of the fluorescent material far away from the substrate is covered with an optical filter, and the optical filter transmits fluorescence, reflects part of laser and transmits part of laser.
2. The wavelength conversion device with selective transmission means according to claim 1, characterized in that: the optical filter comprises a coating layer, and one surface of the optical filter, which is provided with the coating layer, is close to the fluorescent material.
3. The wavelength conversion device with selective transmission means according to claim 1, characterized in that: the optical filter is closely attached to the fluorescent material, and an air gap is formed between the optical filter and the fluorescent material.
4. The wavelength conversion device with selective transmission means according to claim 1, characterized in that: the phosphor material includes a first phosphor layer and a second phosphor layer.
5. The wavelength conversion device with selective transmission means according to claim 4, characterized in that: the first fluorescent material layer is made of a yellow-green fluorescent material, and the second fluorescent material layer is made of an orange-red fluorescent material; the first fluorescent material layer is disposed between the second fluorescent material layer and the substrate.
6. The wavelength conversion device with selective transmission means according to claim 1, characterized in that: the substrate material is sapphire.
7. A light emitting device, characterized by: a wavelength conversion device with a selective transmission means comprising any one of claims 1-6, further comprising a laser light source that emits a laser that excites the wavelength conversion device with a selective transmission means to emit a mixed light.
8. The lighting device according to claim 7, wherein: the transmittance of the laser light through the substrate and the fluorescent material is T1The transmittance of the filter to the laser light is T2Wherein 20% < T1＜50％，30％＜T2＜60％。
9. A light fixture, characterized by: comprising a light emitting device according to claim 7 or 8.
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| CN202023079314.5U CN213900764U (en) | 2020-12-21 | 2020-12-21 | Wavelength conversion device with selective transmission device, light-emitting device and lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646026A (en) * | 2020-12-21 | 2022-06-21 | 杨毅 | Wavelength conversion device and light-emitting device with selective transmission device and a lamp |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114646026A (en) * | 2020-12-21 | 2022-06-21 | 杨毅 | Wavelength conversion device and light-emitting device with selective transmission device and a lamp |
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