TW201724566A - Light emitting diode package structure - Google Patents

Abstract

A light emitting diode package structure including a containing tank and a light-emitting element, the containing tank consisting of a base and at least one wall, the light-emitting element disposing on the base, the two positions corresponding to the opposite two sides of the base being asymmetric structure.

Description

Light emitting diode package structure

The invention relates to a light emitting diode package structure, in particular to a light emitting diode package structure with an asymmetric light type.

Light Emitting Diode (LED) has high brightness, fast response, small size, low pollution, high reliability, and suitable for mass production. Therefore, LEDs are used in lighting or consumer electronics. The development and application will also be more and more. At present, LEDs have been widely used in large billboards, traffic lights, mobile phones, scanners, fax machine light sources and lighting devices. Based on the above, the luminous efficiency and brightness requirements of the light-emitting diodes will be more and more important. Therefore, the research and development of high-brightness light-emitting diodes will be an important issue in solid-state lighting applications.

In addition, taking the lamp as an example, in addition to the specification of the brightness, the lamp must also meet the specification of the projection angle to ensure the driving safety of the driver. However, the current practice is to make an asymmetric design on the reflector lamp cup. When the light-emitting diode is matched with the asymmetrically designed reflector lamp cup, the asymmetric light pattern can be generated by the guide of the reflector lamp cup. That is to say, through the asymmetric design of the reflector lamp cup, the projection angle and brightness of the lamp are in compliance with the vehicle specifications. However, in addition to the cost increase due to the need to use a special reflector lamp cup, the current practice is more susceptible to the assembly error between the reflector lamp cup and the light-emitting diode, which in turn causes inconvenience in light-type adjustment of the lamp, and excessive The primary and secondary optics design will also cause unnecessary loss of light efficiency.

The invention provides a light-emitting diode package structure, thereby solving the problem that the cost of the light-emitting diode is increased by the need of a special reflector lamp cup, and there is still an assembly error between the reflector lamp cup and the light-emitting diode. Along with the problem of inconvenient adjustment of the light type of the lamp.

A light emitting diode package structure according to an embodiment of the present invention includes a groove and a light emitting element. The groove is formed by a bottom and at least one side wall. The bottom has an inner surface. The side wall protrudes from the inner surface. The light emitting element is disposed on the inner surface of the bottom. The opposite sides of the bottom are in an asymmetrical structure.

According to the LED package structure of the above embodiment, the opposite side portions or adjacent side portions of the transmitted light reflecting surface are asymmetrically arranged with respect to the light emitting element, so that the LED package structure itself can provide an asymmetrical The light-emitting diode package structure of the present embodiment can avoid the use of a special reflector lamp cup, and only needs to be matched with a general reflector lamp cup, thereby reducing the light-emitting diode body having the light-emitting diode package structure of the embodiment. The cost of the luminaire.

In addition, since the light-emitting diode package structure itself can provide an asymmetric light type, and no additional primary or secondary optics is required, the assembly error between the light-emitting diode package structure and the related reflector cup and the lens can be eliminated. The impact and loss of efficiency are minimized. Thereby, the light pattern produced by the light-emitting diode lamp having the light-emitting diode package structure of the present embodiment is more easily conformed to the required specifications.

The above description of the present invention and the following description of the embodiments are intended to illustrate and explain the principles of the invention, and to provide a further explanation of the scope of the invention.

Please refer to Figure 1 to Figure 3. 1 is a top plan view of a light emitting diode package structure according to a first embodiment of the present invention. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1.

As shown in FIG. 1 , the LED package structure 10 of the present embodiment includes a recess 100 , a light emitting component 200 , and an encapsulant 300 .

As shown in FIG. 2 and FIG. 3 , the groove 100 includes a bottom portion 110 , a first side wall 120 , a second side wall 130 , a third side wall 140 , and a fourth side wall 150 . The bottom portion 110 has an opposite inner surface 111 and an inner surface 112. The first side wall 120, the second side wall 130, the third side wall 140, and the fourth side wall 150 are respectively located on each side of the bottom portion 110. Each of the side walls 120, 130, 140, 150 protrudes from the inner surface 111 of the bottom portion 110, and the adjacent side walls are connected to make the first side wall 120, the second side wall 130, the third side wall 140 and the fourth side The side walls 150 collectively form an annular side wall (as shown in Figure 1). The opposite sides of the bottom portion 110 are in an asymmetrical structure. For example, the first side wall 120 and the second side wall 130 on opposite sides of the bottom portion 110 have an asymmetrical structure (as shown in FIG. 2). A detailed description will be given later.

In addition, the first side wall 120 has a first reflecting surface 121. The second side wall 130 has a second reflecting surface 131. The third side wall 140 has a third reflecting surface 141. The fourth side wall 150 has a fourth reflecting surface 151. The form of each of the reflecting surfaces 121, 131, 141, and 151 will be described later.

The light emitting element 200 is disposed on the inner surface 111 of the bottom portion 110, and the light emitting element 200 is located at a position of the inner surface 111 with respect to the center point C1 of the outer surface 112, and the first reflecting surface 121, the second reflecting surface 131, and the third reflecting surface 141 And the fourth reflecting surface 151 surrounds the light emitting element 200. The light emitting element 200 has a light emitting surface 210 on a side away from the bottom portion 110. In the present embodiment, the light-emitting element 200 is located at a position C1 of the inner surface 111 with respect to the center point C1 of the outer surface 112, and is not located at the center point C of the inner surface 111, but is not limited thereto. In other embodiments, The light emitting element 200 may also be located at a center point C of the inner surface 111.

The encapsulant 300 is stacked on the recess 100 and covers the light emitting element 200. The encapsulant 300 is doped with at least one phosphor material.

Please continue to see Figure 2. In this embodiment, the first reflective surface 121 is a curved surface, and the first reflective surface 121 protrudes from the inner surface 111 by a first height H1. The second reflecting surface 131 is an upright surface, and the second reflecting surface 131 protrudes from the inner surface 111 by a second height H2. The first height H1 is equal to the second height H2. However, since the first reflecting surface 121 and the second reflecting surface 131 are respectively a curved surface and an upright surface, the first reflecting surface 121 and the second reflecting surface 131 at the opposite sides of the bottom portion 110 have an asymmetrical structure.

Referring to FIG. 3, in the embodiment, the third reflecting surface 141 is a curved surface, and the third reflecting surface 141 protrudes from the inner surface 111 by a third height H3. The fourth reflecting surface 151 is an upright surface, and the fourth reflecting surface 151 protrudes from the inner surface 111 by a fourth height H4. The third height H3 is equal to the fourth height H4. Since the third reflecting surface 141 and the fourth reflecting surface 151 are respectively a curved surface and an upright surface, the third reflecting surface 141 and the fourth reflecting surface 151 at the opposite sides of the bottom portion 110 have an asymmetrical structure.

It should be noted that, in this embodiment, the first reflective surface 121 and the second reflective surface 131, and the third reflective surface 141 and the fourth reflective surface 151 are both asymmetric structures, but not limited thereto. In the embodiment, only the first reflective surface 121 and the second reflective surface 131 may have an asymmetrical structure or only the third reflective surface 141 and the fourth reflective surface 151 may have an asymmetrical structure.

Please refer to Figure 1 to Figure 3. In this embodiment, the first reflective surface 121 and the third reflective surface 141 are both curved surfaces, and the curvature of the curved surface is the same, but the first reflective surface 121 is different from the first distance D1 held by the light-emitting element 200. The third reflecting surface 141 and the third distance D3 held by the light emitting element 200, so that the adjacent first reflecting surface 121 and third reflecting surface 141 are opposite to a plane S1 passing through the center point C2 of the light emitting element 200 Asymmetrical structure.

Since the second reflective surface 131 and the third reflective surface 141 are surfaces of different forms (ie, an upright surface and a curved surface), and the second reflective surface 131 and the second distance D2 held by the light emitting element 200 are different from the third reflection The surface 141 is at a third distance D3 maintained by the light-emitting element 200. Therefore, the adjacent second reflective surface 131 and the third reflective surface 141 are asymmetric with respect to the plane S2 passing through the center point C2 of the light-emitting element 200. .

Since the first reflective surface 121 and the fourth reflective surface 151 are surfaces of different forms (ie, a curved surface and an upright surface), and the first reflective surface 121 and the first distance D1 held by the light emitting element 200 are different from the fourth reflection The surface 151 is at a fourth distance D4 maintained by the light-emitting element 200. Therefore, the adjacent first reflective surface 121 and fourth reflective surface 151 are asymmetric with respect to the plane S2 passing through the center point C2 of the light-emitting element 200. .

Since the second reflecting surface 131 and the second distance D2 held by the light emitting element 200 are different from the fourth reflecting surface 151 and a fourth distance D4 held by the light emitting element 200, the center point C2 of the light emitting element 200 is passed. For the plane S1, the adjacent second reflecting surface 131 and fourth reflecting surface 151 have an asymmetric arrangement.

It is to be noted that, in this embodiment, the adjacent reflective surfaces of the LED assembly 10 are asymmetric with respect to the illuminating element 200, but are not limited thereto. In other embodiments, One or two sets of adjacent reflective faces of the light emitting diode package structure 10 may also have an asymmetrical structure for the light emitting element 200.

In addition, in the embodiment, the forms of the first reflective surface 121, the second reflective surface 131, the third reflective surface 141, and the fourth reflective surface 151 are merely illustrative, and are not limited thereto. In other embodiments, The first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface are all selected from the group consisting of a curved surface, an inclined surface and an upright surface. For example, the first reflecting surface may be a combination of a curved surface and an upright surface, or a combination of an upright surface and an inclined surface.

Please refer to Figure 4. 4 is a schematic view showing the light pattern of the light emitting diode package structure of FIG. 1. The groove 100 is an asymmetrical structure. The light pattern of the LED package structure 10 is converted from a conventional symmetrical form (as indicated by the dashed line) to an asymmetrical form (as indicated by the solid line). It can be seen from the above-mentioned light pattern that the light-emitting diode package structure 10 of the present embodiment can be used to provide a non-symmetrical light type. Therefore, the light-emitting diode package structure 10 of the present embodiment can avoid the special reflective light cup. The cost of the light-emitting diode lamp (not shown) having the light-emitting diode package structure 10 of the embodiment is reduced by using a common reflector lamp cup.

In addition, since the light-emitting diode package 10 itself can provide an asymmetric light type, the influence of assembly error between the light-emitting diode package structure 10 and the reflector cup (not shown) can be minimized. . Thereby, the light pattern produced by the light-emitting diode lamp having the light-emitting diode package structure 10 of the present embodiment is more easily conformed to the required specifications.

In the above embodiment, the first reflective surface 121 of the first sidewall 120 is a curved surface, and the second reflective surface 131 of the second sidewall 130 is an upright surface such that the first reflective surface 121 and the second reflective surface 131 are opposite to each other. The light-emitting element 200 is asymmetrically arranged, but is not limited thereto. Please refer to Figure 5. FIG. 5 is a cross-sectional view showing a light emitting diode package structure according to a second embodiment of the present invention. Here, the cutting position of FIG. 5 is the same as the cutting position of FIG. 2.

In the LED package structure 10a of the present embodiment, the first sidewall 120a and the second sidewall 130a are located on opposite sides of the bottom portion 110 and protrude from the inner surface 111 of the bottom portion 110. The first reflecting surface 121a of the first side wall 120a covers at least a part of the light emitting surface 210 of the light emitting element 200, and the second reflecting surface 131a of the second side wall 130a is an upright surface, so that the first reflection of the bottom side 110 opposite to the two sides The surface 121a and the second reflection surface 131a are arranged asymmetrically with respect to the light-emitting element 200.

Please refer to Figure 6. FIG. 6 is a cross-sectional view showing a light emitting diode package structure according to a third embodiment of the present invention. Here, the cutting position of FIG. 6 is the same as the cutting position of FIG. 2.

In the LED package structure 10b of the present embodiment, the first sidewall 120b and the second sidewall 130b are located on opposite sides of the bottom portion 110 and protrude from the inner surface 111 of the bottom portion 110. A first height H1 of the first reflective surface 121b of the first side wall 120b protruding from the inner surface 111 of the bottom portion 110 is smaller than a second height of the inner surface 111 of the bottom portion 110 of the second reflective surface 131b of the second side wall 130b. H2 is such that the first reflecting surface 121a and the second reflecting surface 131a at the opposite sides of the bottom portion 110 are asymmetrically arranged with respect to the light emitting element 200.

Please refer to Figure 7. FIG. 7 is a cross-sectional view showing a light emitting diode package structure according to a fourth embodiment of the present invention. Here, the cutting position of FIG. 7 is the same as the cutting position of FIG. 2.

In the LED package 10c of the present embodiment, the first sidewall 120c and the second sidewall 130c are located on opposite sides of the bottom portion 110 and protrude from the inner surface 111 of the bottom portion 110. The first reflecting surface 121c of the first side wall 120c and the second reflecting surface 131c of the second side wall 130c are both inclined surfaces. A first angle θ1 of the first reflecting surface 121c and the inner surface 111 are maintained, and the second reflecting surface 130c and the inner surface 111 maintain a second angle θ2, and the first angle θ1 is smaller than the second angle θ2. Thereby, the first reflecting surface 121c and the second reflecting surface 131c at the opposite sides of the bottom portion 110 are arranged asymmetrically with respect to the light emitting element 200.

Please refer to Figure 8. FIG. 8 is a cross-sectional view showing a light emitting diode package structure according to a fifth embodiment of the present invention. Here, the cutting position of FIG. 8 is the same as the cutting position of FIG. 2.

In the LED package 10d of the present embodiment, the first sidewall 120d and the second sidewall 130d are located on opposite sides of the bottom portion 110 and protrude from the inner surface 111 of the bottom portion 110. The first reflecting surface 121d of the first side wall 120d and the second reflecting surface 131d of the second side wall 130d are both curved surfaces, and the curvature of the first reflecting surface 121d is different from the curvature of the second reflecting surface 131d. Thereby, the first reflecting surface 121d and the second reflecting surface 131d at the opposite sides of the bottom portion 110 are arranged asymmetrically with respect to the light emitting element 200.

Please refer to Figure 9. FIG. 9 is a cross-sectional view showing a light emitting diode package structure according to a sixth embodiment of the present invention. Here, the cutting position of Fig. 9 is the same as the cutting position of Fig. 2.

In the LED package structure 10e of the present embodiment, the first sidewall 120e is located on one side of the bottom portion 110 and protrudes from the inner surface 111 of the bottom portion 110. That is, only one side of the bottom 110 has a side wall. The first reflective surface 121e of the first side wall 120e is a curved surface such that the positions of the bottom portion 110 opposite to each other are asymmetrically arranged, that is, the space above the opposite side of the first reflecting surface 121e and the bottom portion 110 on the side of the bottom portion 110 is opposite to The light emitting element 200 is in an asymmetric configuration.

Please refer to Figure 10. FIG. 10 is a cross-sectional view showing a light emitting diode package structure according to a seventh embodiment of the present invention. Here, the cutting position of FIG. 10 is the same as the cutting position of FIG.

In the LED package structure 10f of the present embodiment, the first sidewall 120f is located on one side of the bottom portion 110 and protrudes from the inner surface 111 of the bottom portion 110. That is, only one side of the bottom 110 has a side wall. The first reflective surface 121f of the first side wall 120f covers at least a portion of the light emitting surface 210 of the light emitting element 200. Thereby, the positions of the opposite sides of the bottom portion 110 are asymmetrically arranged, that is, the space above the first reflecting surface 121f on the side of the bottom portion 110 and the side opposite to the bottom portion 110 is asymmetrically arranged with respect to the light emitting element 200.

It should be noted that the above embodiments of FIGS. 5 to 10 are described in which the reflecting surfaces on opposite sides of the light-emitting element are arranged asymmetrically. However, it is not limited thereto. In other embodiments, the concepts of FIGS. 5 to 10 can also be applied to the reflective surfaces of adjacent sides of the light-emitting element.

According to the LED package structure of the above embodiment, the through-groove is asymmetrically arranged with respect to the light-emitting element, so that the LED package structure itself can provide an asymmetric light type, so the light-emitting diode of the embodiment The package structure can avoid the special reflector lamp cup, and only needs to be matched with a general reflector lamp cup, thereby reducing the cost of the LED package having the LED package structure of the embodiment.

In addition, since the light-emitting diode package structure itself can provide an asymmetric light type, the influence of the assembly error between the light-emitting diode package structure and the reflector lamp cup can be minimized. Thereby, the light pattern produced by the light-emitting diode lamp having the light-emitting diode package structure of the present embodiment is more easily conformed to the required specifications.

Furthermore, the portion of the reflective surface covers at least a portion of the light-emitting surface of the light-emitting element, so that the light-emitting diode package structure can more easily reduce the amount of light emitted at a position where the amount of light output is low, and increase the amount of light at a position where the amount of light output is high. It is thus easier to conform the light pattern of the LED package structure to the required specifications.

While the present invention has been described above in terms of the preferred embodiments thereof, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The patent protection scope of the invention is subject to the definition of the scope of the patent application attached to the specification.

10, 10a, 10b, 10c, 10d, 10e, 10f‧‧‧Light emitting diode package structure
100‧‧‧ Groove
110‧‧‧ bottom
111‧‧‧ inner surface
112‧‧‧ outer surface
120, 120a, 120b, 120c, 120d, 120e, 120f‧‧‧ first side wall
121, 121a, 121b, 121c, 121d, 121e, 121f‧‧‧ first reflective surface
130, 130a, 130b, 130c, 130d‧‧‧ second side wall
131, 131a, 131b, 131c, 131d‧‧‧ second reflecting surface
140‧‧‧The third side wall
141‧‧‧ third reflecting surface
150‧‧‧fourth wall
151‧‧‧fourth reflecting surface
200‧‧‧Lighting elements
210‧‧‧Glossy surface
300‧‧‧Package
C1, C2‧‧‧ center point
H1~H4‧‧‧ Height
D1~D4‧‧‧Distance
S1, S2‧‧ plane

1 is a top plan view of a light emitting diode package structure according to a first embodiment of the present invention. 2 is a schematic cross-sectional view taken along line A-A of FIG. 1. 3 is a schematic cross-sectional view taken along line B-B of FIG. 1. 4 is a schematic view showing the light pattern of the light emitting diode package structure of FIG. 1. FIG. 5 is a cross-sectional view showing a light emitting diode package structure according to a second embodiment of the present invention. FIG. 6 is a cross-sectional view showing a light emitting diode package structure according to a third embodiment of the present invention. FIG. 7 is a cross-sectional view showing a light emitting diode package structure according to a fourth embodiment of the present invention. FIG. 8 is a cross-sectional view showing a light emitting diode package structure according to a fifth embodiment of the present invention. FIG. 9 is a cross-sectional view showing a light emitting diode package structure according to a sixth embodiment of the present invention. FIG. 10 is a cross-sectional view showing a light emitting diode package structure according to a seventh embodiment of the present invention.

10‧‧‧Light emitting diode package structure

100‧‧‧ Groove

110‧‧‧ bottom

111‧‧‧ inner surface

112‧‧‧ outer surface

120‧‧‧First wall

121‧‧‧First reflecting surface

130‧‧‧Second side wall

131‧‧‧Second reflective surface

200‧‧‧Lighting elements

210‧‧‧Glossy surface

300‧‧‧Package

C, C1, C2‧‧‧ center point

H1~H2‧‧‧ Height

D1~D2‧‧‧Distance

Claims (19)

A light-emitting diode package structure comprising: a groove formed by a bottom portion and at least one side wall; and a light-emitting element disposed on the bottom portion, wherein the bottom portion has an asymmetric structure at opposite sides. The light emitting diode package structure of claim 1, wherein the bottom portion has an opposite inner surface and an outer surface, and the light emitting element is disposed on the inner surface and located on the inner surface relative to the bottom portion. The position of one of the center points of the outer surface. The light emitting diode package structure of claim 1, wherein the light emitting element has a light emitting surface, and a portion of the side wall covers at least a portion of the light emitting surface of the light emitting element. The illuminating diode package structure of claim 1, wherein the at least one side wall has one and includes a first side wall on one side of the bottom and protrudes from the bottom An inner surface having a first reflective surface. The light emitting diode package structure of claim 4, wherein the first reflective surface is selected from the group consisting of a curved surface, an inclined surface, and an upright surface. The light emitting diode package structure of claim 4, wherein the light emitting element has a light emitting surface on a side away from the bottom portion, and a portion of the first reflecting surface covers at least part of the light emitting surface of the light emitting element. . The illuminating diode package structure of claim 1, wherein the at least one side wall has two, including a first side wall and a second side wall, and the illuminating element is stacked on an inner surface. The first side wall and the second side wall are respectively located on opposite sides of the bottom and protrude from the inner surface of the bottom, the first side wall has a first reflecting surface, and the second side wall has a second reflecting surface, the second reflecting surface being asymmetric with respect to the first reflecting surface. The light emitting diode package structure of claim 7, wherein the first reflective surface has a first height protruding from the inner surface, and the second reflective surface has a second surface protruding from the inner surface Height, the first height being different from the second height. The light emitting diode package structure of claim 7, wherein the first reflective surface and the second reflective surface are planar, and the first reflective surface and the inner surface maintain a first angle, the first The two reflecting surfaces maintain a second angle with the inner surface, and the first angle is different from the second angle. The light emitting diode package structure of claim 7, wherein the first reflective surface and the second reflective surface are curved surfaces, and the curvature of the first reflective surface is different from the curvature of the second reflective surface. The light emitting diode package structure of claim 7, wherein the first reflective surface is a curved surface, and the second reflective surface is a flat surface. The light-emitting diode package structure of claim 7, wherein the light-emitting element has a light-emitting surface on a side away from the bottom portion, and a portion of the first reflective surface covers at least a portion of the light-emitting surface of the light-emitting element. . The light emitting diode package structure of claim 7, wherein the groove further comprises a third side wall, the first side wall and the third side wall are respectively located on adjacent sides of the bottom, And protruding from the inner surface of the bottom, the first side wall has a first reflecting surface, the third side wall has a third reflecting surface, the third reflecting surface is asymmetric with respect to the first reflecting surface. The light emitting diode package structure of claim 13, wherein the first reflective surface has a first height protruding from the inner surface, and the third reflective surface has a third surface protruding from the inner surface Height, the first height being different from the third height. The light emitting diode package structure of claim 13, wherein the first reflective surface and the third reflective surface are planar, and the first reflective surface and the inner surface maintain a first angle, the first The three reflecting surface maintains a third angle with the inner surface, and the first angle is different from the third angle. The light emitting diode package structure of claim 13, wherein the first reflective surface and the third reflective surface are curved surfaces, and the curvature of the first reflective surface is different from the curvature of the third reflective surface. The light emitting diode package structure of claim 13, wherein the first reflective surface is a curved surface, and the third reflective surface is a flat surface. The light emitting diode package structure of claim 13, wherein the groove further comprises a fourth side wall, the fourth side wall and the third side wall are respectively located on opposite sides of the bottom side, and Projecting from the inner surface of the bottom portion, the fourth side wall has a fourth reflecting surface, and the first reflecting surface, the second reflecting surface, the third reflecting surface and the fourth reflecting surface are opposite to the light emitting element It is an asymmetric structure. The light emitting diode package structure of claim 1, further comprising an encapsulant, the potting compound being doped with a fluorescent material.