WO2019153755A1 - Illumination module and illumination lamp - Google Patents

Abstract

Disclosed is an illumination module and an illumination lamp. The illumination module comprises an LED light source set (10), a wavelength conversion layer (20), and a reflective bowl (30). The LED light source set (10) and the wavelength conversion layer (20) are located inside the reflective bowl (30) and are successively attached in an opening direction of the reflective bowl (30). A side face of the wavelength conversion layer (20) is located at the focus of the reflective bowl (30), and a total reflection layer (50) is provided on one face, away from the LED light source set (10), of the wavelength conversion layer (20). The side face of the wavelength conversion layer (20) is covered with a transparent layer (40), and the refractive index of the transparent layer (40) is between the refractive index of the wavelength conversion layer (20) and the refractive index of air, thus reducing the refractive index difference of two sides of the light emergent interface and improving the light extraction efficiency, the illumination brightness, and the brightness of the illumination lamp.

Description

 Lighting module and lighting technology

 [0001] The present invention relates to the field of lighting technologies, and in particular, to a lighting module and an illumination lamp.

 Background technique

 [0002] With the development of semiconductor technology, LED (Light Emitting Diode) light source is gradually replacing traditional incandescent lamps and energy saving due to its high luminous flux, long life, small structure, safety, high efficiency, energy saving and so on. The lamp becomes a universal illumination source.

 [0003] 5 See some LED lights usually put a blue or ultraviolet LED chip and a transparent phosphor sheet, the phosphor in the phosphor sheet is excited by blue or ultraviolet light emitted by the blue or ultraviolet LED chip to generate excitation light. The final excitation light is mixed with the remaining blue light into a white light beam. Such LED lamps usually have problems of insufficient brightness, and are particularly limited in applications such as headlights or stage lights.

 Summary of invention

 technical problem

 Problem solution

 Technical solution

 The present invention provides a lighting module and an illumination lamp to solve the problems of low light extraction efficiency, insufficient illumination brightness, and limited application in the prior art.

 [0005] In order to solve the above technical problem, the technical solution of the present invention is: a lighting module, comprising an LED light source group, a wavelength conversion layer and a reflective bowl, wherein the LED light source group and the wavelength conversion layer are located inside the reflective bowl, And disposed in the order of the opening direction of the reflective bowl, the side of the wavelength conversion layer is located at the focus of the reflective bowl, and the surface of the wavelength conversion layer away from the LED light source group is provided with a total reflection layer.

 [0006] Further, a side surface of the wavelength conversion layer is covered with a transparent layer, and a refractive index of the transparent layer is between a wavelength conversion layer and a refractive index of air.

 Further, the transparent layer is made of a silicone gel.

 [0008] Further, the wavelength conversion layer is a fluorescent ceramic sheet.

[0009] Further, the size of the wavelength conversion layer is not smaller than the size of the LED light source group. [0010] Further, the LED light source group includes a plurality of LED chips, the plurality of LED chips are arranged in a rectangular shape or a circular shape or an approximately circular shape, and the wavelength conversion layer has a cross section that is compatible with the shape of the LED light source group. Match

[0011] Further, a heat conducting layer is disposed between the LED light source group and the wavelength conversion layer, and the heat conducting layer transmits light emitted by the LED light source group to reflect light excited by the wavelength conversion layer.

 [0012] Further, the size of the heat conductive layer is not smaller than the size of the wavelength conversion layer.

 [0013] Further, the heat conducting layer is made of glass or sapphire.

 [0014] The present invention also provides an illumination lamp comprising the illumination module as described above.

 Advantageous effects of the invention

 Beneficial effect

 [0015] The illumination module and the illumination lamp provided by the invention comprise an LED light source group, a wavelength conversion layer and a reflective bowl, wherein the LED light source group and the wavelength conversion layer are located inside the reflective bowl, and along the reflective bowl The opening direction is sequentially disposed, the side of the wavelength conversion layer is located at the focus of the reflective bowl, and the surface of the wavelength conversion layer away from the LED light source group is provided with a total reflection layer. By providing a total reflection layer on the side of the wavelength conversion layer away from the LED light source group, the light is reflected, so that the light finally emerges from the side of the wavelength conversion layer, since the wavelength conversion layer is closer to and away from the LED light source group than the side surface, The area of the light exit surface is greatly reduced, and the brightness of the light emitting surface is increased. By coating the transparent layer on the side of the wavelength conversion layer, and the refractive index of the transparent layer is between the wavelength conversion layer and the refractive index of the air, the light is emitted. The refractive index difference on both sides of the interface improves the light extraction efficiency and illumination brightness, which ultimately improves the brightness and application of the illumination.

 Brief description of the drawing

 DRAWINGS

 1 is a schematic structural view of a specific embodiment of a lighting module of the present invention;

 2 is a schematic structural view of another embodiment of a lighting module of the present invention;

 3 is a schematic structural view of a specific embodiment of a light source group according to the present invention;

 4 is a schematic structural view of another specific embodiment of a light source group according to the present invention.

[0020] The figure shows: 10, LED light source group; 110, LED chip; 20, wavelength conversion layer; 30, reflective bowl; 40, transparent layer; 50, total reflection layer; 60, heat conduction layer. Invention embodiment

 Embodiments of the invention

 [0021] The present invention will be described in detail below with reference to the accompanying drawings:

 [0022] As shown in FIG. 1, the present invention provides a lighting module including an LED light source group 10, a wavelength conversion layer 20, and a reflective bowl 30. The LED light source group 10 and the wavelength conversion layer 20 are located in the reflective bowl. 30, and disposed in the order of the opening direction of the reflective bowl 30, the side of the wavelength conversion layer 20 is located at the focus of the reflective bowl 30, and the surface of the wavelength conversion layer 20 away from the LED light source group 10 is provided with a total reflection layer 50. . Specifically, the light emitted from the LED light source group 10 is projected onto the wavelength conversion layer 20. Since the wavelength conversion layer 20 is provided with the total reflection layer 50 on one side of the LED light source group 10, the wavelength conversion particles inside the wavelength conversion layer 20 are excited. The light finally exits from the side of the wavelength conversion layer 20 and is reflected by the reflective bowl 30 to form an illumination beam. The wavelength conversion layer 20 is a phosphor layer, and the surface close to and away from the LED light source group 10 is much larger than the side surface, that is, when the wavelength When the conversion layer 20 has a rectangular parallelepiped structure, the length and the width are much larger than the height, and the difference is usually 10 times or more. When the wavelength conversion layer 20 has a cylindrical structure, the diameters of the upper and lower bottom surfaces are much larger than the height, and usually differ by more than 10 times, so the present invention passes The light is emitted from the side of the wavelength conversion layer 20, the area of the light exit surface is greatly reduced, and the brightness of the exit surface is improved. In addition, it should be noted that the side surface of the wavelength conversion layer 20 is located at the focus of the reflective bowl 30, which is equivalent to each point of the conventional conventional reflective bowl 30 (that is, a paraboloid formed by rotating a parabola about 360 degrees from the axis). The central axis is outwardly translated by a distance equal to the half length or half width or radius of the cross section of the wavelength conversion layer 20, and the focus is plural and forms a rectangle or a circle, that is, the reflective bowl is a compound paraboloid. The light in the figure is only a schematic diagram. In reality, the light is not absolutely parallel, and some of the light will exit from the middle of the vacancy, thus forming a uniform illumination spot.

其中 [0023] As shown in FIG. 2, a transparent layer 40 is disposed outside the side surface of the wavelength conversion layer 20, and the refractive index of the transparent layer 40 is between the wavelength conversion layer 20 and the refractive index of the air, and the wavelength conversion layer A side of the 20 away from the LED light source group 10 is provided with a total reflection layer 50. The wavelength conversion layer 20 is preferably a fluorescent ceramic sheet. Specifically, the wavelength conversion layer 20 is generally a phosphor sheet or a fluorescent ceramic sheet having a refractive index of about 1.8 and a refractive index of air of 1, so that the difference between the two is large, and the calculation formula according to the reflectance is:

among them

The refractive index of the medium on both sides of the light exit interface is known to reduce the difference between the two, thereby reducing the reflectance and increasing the light exit rate. The wavelength conversion layer 20 is farther away from the side of the LED light source group 10 than the side surface, that is, when the wavelength conversion layer 20 has a rectangular parallelepiped structure, the length and the width are much larger than the height, and usually differ by more than 10 times, when the wavelength conversion layer 20 is a cylindrical structure. When the diameters of the upper and lower bottom surfaces are much larger than the height, the difference is usually 10 times or more, and thus the present invention greatly reduces the area of the light exiting surface by increasing the light exiting surface by increasing the light exiting surface from the side of the wavelength conversion layer 20.

 [0024] Preferably, the transparent layer 40 is made of a silicone gel. Since the silica gel has good light transmittance and a refractive index of about 1.5, the light extraction efficiency can be greatly improved. Of course, the transparent layer can also be made of other low refractive index high temperature transparent materials, and is not limited herein.

 [0025] Preferably, the size of the wavelength conversion layer 20 is not smaller than the size of the LED light source group 10. That is, the wavelength conversion layer 20 can cover the LED light source group 10, and the light emitted from the LED light source group 10 can be completely projected onto the wavelength conversion layer 20.

 As shown in FIG. 3, the LED light source group 10 includes a plurality of LED chips 110, the plurality of LED chips 110 are arranged in a rectangular shape, and a cross section of the wavelength conversion layer 20 is in a shape corresponding to the shape of the LED light source group 10. Fitted rectangle. In Fig. 2, the number of LED chips 110 is nine, and a 3*3 square array is arranged in the length and width directions. At this time, the wavelength conversion layer 20 has a square structure structure, and light rays are emitted from four sides thereof. Of course, the number of LED chips 110 may be more or less, which is not limited herein.

[0027] As shown in FIG. 4, the LED light source group 10 includes a plurality of LED chips 110, the plurality of LED chips 110 are arranged in a circular or approximately circular shape, and the wavelength conversion layer 20 has a cross section and the LED light source. The shape of the group 10 is a matching circle. That is, the plurality of LED chips 110 correspond to one phosphor layer, and it is not necessary to separately provide a phosphor layer for each of the LED chips 110, which simplifies the structure and is more convenient to manufacture. In FIG. 4, the number of the LED chips 110 is eight, arranged in an approximate manner. In the circular shape, at this time, the wavelength conversion layer 20 has a cylindrical structure, and light rays are emitted from the side surface to form a circular spot. Of course, the number of LED chips 110 can be more or less, not to do here. Limited.

 [0028] Referring to FIG. 2, a heat conducting layer 60 is disposed between the LED light source group 10 and the wavelength conversion layer 20 for quickly deriving the heat generated by the wavelength conversion layer 20 and the LED light source group 10 to avoid the wavelength conversion layer. 20 The heat is too high and is damaged. The heat conducting layer 60 transmits the light emitted by the LED light source group 10, and reflects the light excited by the wavelength conversion layer 20. The size of the heat conducting layer 60 (ie, the size of the cross section) is not less than the wavelength. The size of the conversion layer 20 (i.e., the size of the cross section) can be connected to the heat sink (not shown) on the outer side of the reflective bowl 30, and the heat dissipation can be quickly performed by the heat sink. Preferably, the heat conducting layer 60 is made of glass or sapphire. Further, the heat conducting layer 60 is coated with an optical film which transmits light emitted from the LED light source group 10 and reflects the light excited by the wavelength converting layer 20.

 [0029] The present invention also provides an illumination lamp comprising the illumination module as described above.

 [0030] In summary, the present invention provides a lighting module and an illumination lamp, the lighting module includes an LED light source group 10, a wavelength conversion layer 20, and a reflective bowl 30, and the LED light source group 10 and the wavelength conversion layer 20 are located. The inside of the reflective bowl 30 is disposed in the order of the opening direction of the reflective bowl 30. The side of the wavelength conversion layer 20 is located at the focus of the reflective bowl 30, and the wavelength conversion layer 20 is disposed away from the side of the LED light source group 10. Total reflection layer 50. By providing a total reflection layer 50 on the side of the wavelength conversion layer 20 remote from the LED light source group 10, the light is reflected so that the light finally emerges from the side of the wavelength conversion layer 20, since the wavelength conversion layer 20 is close to and away from the surface of the LED light source group 10. It is much larger than the side surface, so that the area of the light exit surface can be greatly reduced, and the brightness of the light emitting surface can be improved; by coating the transparent layer 40 on the side of the wavelength conversion layer 20, and the refractive index of the transparent layer 40 is interposed between the wavelength conversion layer 20 and the air. Between the refractive indices, the refractive index difference between the two sides of the light exit interface is lowered, the light extraction efficiency and the illumination brightness are improved, and the brightness and application versatility of the illumination lamp are finally improved.

 [0031] While the embodiments of the present invention have been described in the specification, these embodiments are merely illustrative and are not intended to limit the scope of the invention. Various omissions, substitutions and changes may be made without departing from the scope of the invention.

Claims

Claim  [Claim 1] A lighting module includes an LED light source group, a wavelength conversion layer, and a reflective bowl, wherein the LED light source group and the wavelength conversion layer are located inside the reflective bowl, and along the opening direction of the reflective bowl In turn, the side of the wavelength conversion layer is located at the focus of the reflective bowl, and the surface of the wavelength conversion layer away from the LED light source group is provided with a total reflection layer.  [Claim 2] The illumination module according to claim 1, wherein a side surface of the wavelength conversion layer is covered with a transparent layer, and a refractive index of the transparent layer is interposed between a wavelength conversion layer and air refraction. Between the rates.  [Claim 3] The lighting module according to claim 2, wherein the transparent layer is made of silicon gel. [Claim 4] The lighting module according to claim 2, wherein the wavelength conversion layer is a fluorescent ceramic sheet. [Claim 5] The lighting module according to claim 1, wherein the wavelength conversion layer has a size not less than a size of the LED light source group. [Claim 6] The lighting module according to claim 1, wherein the LED light source group includes a plurality of LED chips, and the plurality of LED chips are arranged in a rectangular or circular shape or an approximately circular shape, and the wavelength conversion The cross section of the layer is adapted to the shape of the set of LED light sources.  [Claim 7] The lighting module according to claim 1, wherein a heat conducting layer is disposed between the LED light source group and the wavelength conversion layer, and the heat conducting layer transmits light emitted by the LED light source group, and reflects the wavelength The light that is excited by the conversion layer.  [Claim 8] The lighting module according to claim 1, wherein the heat conductive layer has a size not less than a size of the wavelength conversion layer. [Claim 9] The lighting module according to claim 7, wherein the heat conducting layer is made of glass or sapphire.  [Aspect 10] A lighting lamp, comprising the lighting module according to any one of claims 1 to 9.