TW201308529A - Multi-layered array-type LED light engine - Google Patents

Abstract

A multi-layered array-type LED light engine at least comprises a substrate, a package body, two lead-frame pairs, an LED grain, and an optical lens set, wherein the circular periphery of the substrate is wrapped up through the package body, and the wrapping range needs to cover the upper and lower peripheral parts of the periphery, so that the package body and the substrate are formed into an absolutely sealed structure body. The present invention can dispose a fluorescent layer between an optical gel layer and a silicone protection layer in the optical chamber of the package body, so as to form another moisture-proof mechanism to prevent the fluorescent layer from being moistened and deterioration, wherein the optical gel layer has a refractive coefficient with a predetermined range, so as to enhance the probability of photon to be emitted out of the optical chamber, thereby achieving a multi-layered array-type LED light engine capable of enhancing the light-emitting efficiency and completely preventing the optical element from being moistened.

Description

Multilayer array type light emitting diode light engine

A multi-layer array type light-emitting diode light engine, in particular, relates to a multi-layer array type light-emitting diode light engine which can improve luminous efficiency and completely avoid moisture of optical components.

According to the principle of LED illumination, it is different from the inherent characteristics of semiconductors. It is different from the principle of discharge and heat emission of incandescent lamps. Instead, it will emit light when flowing current into the PN junction of the semiconductor, so the LED is called Cold light. LEDs are widely used in the lighting industry because of their high durability, long life, light weight, low power consumption, and no harmful substances such as mercury. They are usually applied to electronic boards in LED array packages. Business areas such as traffic signs.

The packaging method of the multi-layer array type light-emitting diode of the prior art is to first prepare a substrate, and position the two lead frames in the lead frame receiving groove of the substrate, and then project a package module to form the substrate with two The lead frame is embedded and fixed, and then the light-emitting diode crystal grains are disposed on the surface of the light-emitting area of the substrate, and the light-emitting diode crystal grains and the two lead frames form an electrical circuit. An insulating protective layer and a phosphor layer are sequentially formed on the diode, and finally the lens cover is directly emitted on the package module, wherein the light emitting diodes can be arranged on the substrate by array arrangement, and the present invention is laminated. The packaging method of the method is to form a multilayer array type light emitting diode.

However, the shortcomings of the prior art are that it cannot be used for a long time in an environment with high water and moisture content, and a sinister environment such as deep sea, space or military, because the layers of the package after the completion of the package are not surely sealed and joined, of course, cannot be required. The overall airtightness, so moisture or moisture easily penetrates into the inside of the package structure, resulting in deterioration or even damage of the light-emitting element and the optical unit, so that it cannot be used in a humid environment, and the overall structural strength is affected, and the reflector must be Separate fabrication and assembly results in low package efficiency, which must be improved and provide a package structure for a light-emitting diode that completely blocks moisture ingress, is robust, and maintains optical component performance over time.

The main object of the present invention is to provide a multi-layer array type light emitting diode light engine, which provides an absolute sealed and multi-layer moisture-proof structure structure, thereby preventing the phosphor layer and the optical element from being deteriorated by moisture.

In order to achieve the above object, the specific technical means of the present invention comprises a substrate having a surface and a light exiting portion, the surface is provided with a slot, the slot is disposed around the light exiting portion, and the substrate has a circumference of the ring, the package holes are disposed at a periphery of the circumference of the ring of the substrate; and a package body completely covering the circumference of the substrate and the periphery of the circumference of the ring, The package body also covers the package holes and the slot, the package body and surrounding an optical cavity, the optical cavity has a light exit port corresponding to the light exit portion, the optical cavity has a light chamber The inner wall surface has a top surface, and the inner wall surface has an angle relationship with respect to a surface of the light exit portion, and a top surface of the inner wall surface is provided with a joint surface, the sealing surface and the package body Between the top surfaces, there is a surface difference; two lead frames are embedded in the package and spaced apart from the substrate, and each lead frame has two ends, and the two lead frames The ends are outside Outside the package; a plurality of light-emitting diode crystal grains, the light-emitting diode crystal grains are located on a surface of the light-emitting portion, and the light-emitting diode crystal grains and the two lead frames constitute an electric a crystalline protective layer, the die protection layer is located above the light emitting diode die; an optical adhesive layer, the optical adhesive layer is located above the die protective layer; a fluorescent layer, the The phosphor layer is disposed on the optical adhesive layer; a silicone protective layer on the fluorescent layer; and an optical lens assembly for sealingly sealing the optical opening.

The optical adhesive layer has a specific range of refractive index to enhance the probability of photons exiting the optical chamber.

The embodiments of the present invention will be described in more detail below with reference to the drawings and the <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt; </ RTI> <RTIgt;

Referring to the first figure, a perspective cross-sectional view of a multilayer array type light emitting diode light engine of the present invention which can eliminate moisture. The invention relates to a multi-layer array type light-emitting diode light engine, which can completely prevent moisture from entering the interior of the multi-layer array type light-emitting diode light engine, and prevent internal important components from being deteriorated by moisture. The multi-layer array type LED light engine includes at least one substrate 1, a package 3, two lead frame pairs 5, a plurality of LED dipoles 5, and an optical lens group 20.

The substrate 1 has a surface 11 , a light exiting portion 13 and a plurality of package holes 15 . The light exiting portion 13 is located at a central portion of the surface 11 , and the surface 11 is provided with at least one slot slit 111 , the at least one turn The slit 111 is disposed around the light exit portion 13. The shape of the at least one slit slot 111 may be a ring shape as shown in this embodiment, or may be other suitable forms, and the substrate 1 has a ring circumference 113. The package holes 115 are distributed at the periphery of the ring periphery 113 of the substrate 1.

The cross-sectional shape of the at least one slot 111 may be V-shaped, concave, U-shaped or other suitable shape, and preferably, a hook portion 111a is formed on the inner edge of the at least one slot 111. As shown in the second figure, the hook portion 111a can be formed in any direction within the at least one slit slot 111.

Referring to the third figure, a side view of the package forming of the substrate and the package of the present invention. The package body 3 completely covers the ring periphery 113 of the substrate 1 and the periphery of the ring periphery 113. The package 3 also covers the package holes 15 and the slot 11 together. The optical cavity 31 has an optical opening 31 311 corresponding to the light exiting portion 13 . The optical cavity 31 has an inner wall surface 313 , and the package body 3 has a top surface 33 . The inner wall surface 313 has an angle relationship with the surface of the light exiting portion 13, that is, if the surface of the light exiting portion 13 presents a horizontal plane, the inner wall surface 313 is disposed as a slope to facilitate reflection of light to the multilayer array type. In addition to the light-emitting diode light engine, the top edge of the inner wall surface 313 is provided with a mating surface 35, and the sealing surface 35 has a surface difference with the top surface 33 of the package body 3, wherein A reflector 4 can be disposed above the inner wall surface 313.

The two lead frames 5 are embedded in the package 3 and spaced apart from the substrate 1. Each lead frame 5 has two ends, and the two ends of the two lead frames 5 are exposed to the package. Outside of body 3.

Referring to the fourth figure, a schematic cross-sectional view of a multilayer array type light emitting diode light engine of the present invention which can eliminate moisture is shown. The light emitting diodes 6 are located on the surface of the light exiting portion 13, so that when the light emitting diodes 6 generate light, the emitted light can be reflected by the reflector 4 to the multilayer array. In addition to the light-emitting diode light engine, the light-emitting luminance and the light-emitting efficiency are effectively improved, and the light-emitting diode crystal grains 6 are preferably arranged in an array type arrangement, wherein the light-emitting diode crystal grains are arranged. 6 is wire-bonded and electrically connected to one end of the two lead frames 5 to form a circuit, and the other end of the two lead frames 5 is connected to a power source.

A die-protective layer 7 is formed on the light-emitting diodes 6 and the die-protective layer 7 is coated to protect the light-emitting diodes 6 and the die-protective layer 7 Forming an optical adhesive layer 8, a phosphor layer 9 and a silicone protective layer 10, wherein the phosphor layer 9 is interposed between the optical adhesive layer 8 and the silicone protective layer 10, wherein the optical adhesive layer 8 is reflected The coefficient is at least greater than 1.5.

The optical lens unit 20 is configured to be sealed with the light exit opening 311 to prevent moisture from entering. The optical lens unit 20 may be composed of an upper optical lens 210, a spacer ring 220 and a lower optical lens 230. The ring 220 is disposed on the upper optical lens 210 and the lower optical lens 230, and the spacer ring 220 is disposed on the sealing surface 35 and is sealingly sealed with the sealing surface 35. The lens 210 may be a flat lens, a concave lens, a curved mirror, or a convex lens as shown in the fifth figure.

Referring to FIG. 6 , a schematic diagram of a third embodiment of a multi-layer array type LED light engine capable of eliminating moisture according to the present invention, and referring to FIG. 7 , the multi-layer array type LED of the present invention can eliminate moisture. A schematic diagram of a fourth embodiment of a body light engine. As shown in FIG. 6 and FIG. 7 , the two lead frames 5 can also be packaged in the package 3 corresponding to the silicone protective layer 10 when the light emitting diodes 6 are illuminated by light. When the generated heat energy is transmitted to the two lead frames 5, even if the heat or moisture generated in the interior thereof is not affected by the phosphor layer 9, the deterioration is deteriorated.

As shown in the seventh figure, the optical lens group 20 can also use a single optical lens 240. It should be noted that the mutual arrangement thickness ratio between the die protection layer 7, the optical adhesive layer 8, the phosphor layer 9, and the silicone protective layer 10 is determined according to actual needs, and is merely illustrative. The examples are not intended to limit the scope of the invention.

As described above, the present invention penetrates the peripheral edge 113 of the substrate 1 through the package 3, and particularly covers the lower peripheral portion of the peripheral edge 113 of the ring, thus causing the package 3 and the substrate 1 to form an absolutely sealed structure. And because the package holes 15 and the slots 11 are established, the package 3 can be fixedly formed with the substrate 1 very tightly.

Furthermore, the present invention further provides the phosphor layer 9 between the optical adhesive layer 8 and the silicone protective layer 10 in the optical chamber 31, thereby providing a more moisture-proof mechanism to prevent the fluorescent light. The layer 9 is deteriorated by moisture. It is worth noting that the optical adhesive layer 8 has a reflection coefficient of at least greater than 1.5, which is more advantageous for increasing the reflection efficiency of the light. The multiple sealing structure of the present invention can prevent the internal optical components from being damaged by moisture. The purpose is also to improve luminous efficiency and brightness.

The above is only a preferred embodiment for explaining the present invention, and is not intended to limit the present invention in any way, and any modifications or alterations to the present invention made in the spirit of the same invention. All should still be included in the scope of the intention of the present invention.

1. . . Substrate

11. . . surface

13. . . Light exit

15. . . Package hole

111. . . Slot

111a. . . Hook

113. . . Ring circumference

3. . . Package

31. . . Optical chamber

33. . . Top surface

35. . . Sealing surface

313. . . Inner wall

4. . . Reflector

5. . . Lead frame

6. . . Light-emitting diode grain

7. . . Grain protection layer

8. . . Optical adhesive layer

9. . . Fluorescent layer

10. . . Silicone protective layer

20. . . Optical lens unit

210. . . Upper optical lens

220. . . Spacer ring

230. . . Lower optical lens

240. . . optical lens

The first figure is a perspective cross-sectional view showing a multilayer array type light emitting diode light engine of the present invention which can eliminate moisture.

The second figure is a schematic view showing a first embodiment of the multi-layer array type light-emitting diode light engine of the present invention which can eliminate moisture.

The third figure is a side view showing the package forming of the substrate and the package of the present invention.

The fourth figure is a schematic cross-sectional view showing a multi-layer array type light-emitting diode light engine of the present invention which can eliminate moisture.

The fifth figure is a schematic view showing a second embodiment of the multi-layer array type light-emitting diode light engine of the present invention which can prevent moisture.

Fig. 6 is a view showing a third embodiment of the multi-layer array type light-emitting diode light engine of the present invention which can eliminate moisture.

The seventh figure is a schematic view showing a fourth embodiment of the multi-layer array type light-emitting diode light engine of the present invention which can eliminate moisture.

1. . . Substrate

11. . . surface

13. . . Light exit

15. . . Package hole

111. . . Slot

113. . . Ring circumference

3. . . Package

33. . . Top surface

35. . . Sealing surface

313. . . Inner wall

4. . . Reflector

5. . . Lead frame

6. . . Light-emitting diode grain

20. . . Optical lens unit

210. . . Upper optical lens

220. . . Spacer ring

230. . . Lower optical lens

Claims (6)

A multilayer array type light emitting diode light engine capable of eliminating moisture, comprising: a substrate having a surface and a light exiting portion, wherein the surface is provided with at least one groove slot, the at least one groove The slit is disposed around the light exiting portion, and the substrate has a ring circumference, and the package holes are distributed around the periphery of the ring of the substrate; a package body, the package body surrounds the ring of the substrate and The package is completely covered at the periphery of the circumference of the ring, and the package also covers the package holes and the slot. The package body and an optical chamber is defined. The optical chamber has a corresponding An optical port of the light exiting portion, the optical cavity has an inner wall surface, and the package body has a top surface, the inner wall surface has an angle of intersection with the surface of the light exiting portion, and the top edge of the inner wall surface is outwardly disposed a sealing surface having a surface difference from the top surface of the package; two lead frames embedded in the package and spaced apart from the substrate, each having a spacing a lead frame with two The two ends of the two lead frames are exposed outside the package; a plurality of light-emitting diode crystal grains are disposed on the surface of the light-emitting portion, and the light-emitting diodes The polar body die and the two lead frames form an electrical connection; a die protection layer, the die protection layer is located above the light emitting diode die; an optical adhesive layer, the optical adhesive layer is located Above the die protection layer; a phosphor layer on the optical adhesive layer; a silicone protective layer on the phosphor layer; and an optical lens group, the optical lens The group is used for sealing and sealing with the light exit port. The multilayer array type light emitting diode light engine according to claim 1, wherein a reflector can be disposed on the inner wall surface. The multilayer array type light emitting diode light engine according to claim 1, wherein the optical adhesive layer has a refractive index of at least not less than 1.5. The multi-layer array type light emitting diode light engine according to claim 1, wherein the optical lens group is composed of an upper optical lens, a spacer ring and a lower optical lens. The ring is disposed on the upper optical lens and the lower optical lens, and the spacer ring is disposed on the sealing surface and sealed to the sealing surface. The multilayer array type light emitting diode light engine according to claim 1, wherein the cross-sectional shape of the at least one groove slot can be set to at least a V shape, a concave shape or a U shape. . The multilayer array type light emitting diode light engine according to claim 1, wherein the inner edge of the at least one slit is formed with a hook portion.