TWM460411U - Light-emitting structure - Google Patents

Abstract

A light-emitting structure includes a substrate, a light element, an encapsulating gel, and several wavelength conversion lines. The light element is disposed on the substrate. The encapsulating gel is covered with the light element. The wavelength conversion lines are alternately disposed in the light lateral of the light element, and an interval is formed between each of the wavelength conversion lines and the light element.

Description

Light structure

The present invention relates to a light-emitting structure, and more particularly to a light-emitting structure of a light-emitting diode.

In recent years, in order to save energy, many different forms of energy-saving lighting devices have been developed at this stage. Light Emitting Diode (LED) is widely used in many lighting devices because of its high luminous efficiency, low power consumption, mercury-free and long service life.

As for the white LED for illumination, the prior art has disclosed various fabrication methods, one of which is to use the LED chip together with the phosphor powder, so that the white LED can emit white light by mixing light. For example, the blue light generated by the blue LED chip can excite the yellow phosphor to produce yellow light, and further mix the blue light and the yellow light to emit light in the form of white light.

In addition, when using LED chips in combination with phosphors to make lighting tools, the common phosphor coating technology includes a remote phosphor technology (Remote Phosphor). One way to stay away from the phosphor powder technology is to apply the phosphor powder to the diffuser. This technology prevents the phosphor from being emitted by the LED chip when compared to the traditional way of adding the phosphor to the encapsulant. Heat impact. In addition, because the life of fluorescent powder is not as good as LED chip Body, so once the color temperature of the light changes, just replace the diffuser and continue to use. However, when the phosphor powder is applied to the diffusion plate, since the area of the phosphor powder coating needs to be equal to the light-emitting area of the light-emitting structure, the amount of powder for the phosphor powder is greatly increased. In addition, the cost of the phosphor powder is expensive, and the manufacturing cost of the lighting tool is also increased.

In view of the problems faced by the prior art, the present invention provides a light emitting structure to solve the problems caused by the prior art.

According to an embodiment of the present invention, a light emitting structure includes a substrate, a light emitting element, an encapsulant, and a plurality of wavelength conversion lines. The light emitting element is disposed on the substrate. The encapsulant covers the illuminating element. A plurality of wavelength conversion lines are arranged at intervals on the light emitting side of the light emitting element, and each of the wavelength conversion lines and the light emitting element have a spacing.

In an embodiment of the present invention, the wavelength conversion lines are arranged in parallel with each other.

In an embodiment of the present invention, each of the wavelength conversion lines has a light-transmitting wire body and a wavelength converting material, and the wavelength converting material is coated on the outer surface of the light-transmitting wire body or placed in the light-transmitting wire body.

In an embodiment of the invention, the wavelength converting substance comprises a phosphor.

In an embodiment of the invention, the material of the light-transmitting wire body comprises polyethylene.

In an embodiment of the invention, each wavelength conversion line is curved.

In an embodiment of the present invention, the vertical distance between the wavelength conversion line and the substrate relative to the upper surface of the light emitting element is greater than the vertical distance of one end of each wavelength conversion line from the substrate.

In an embodiment of the present invention, the distance between each wavelength conversion line and the adjacent wavelength conversion line is increased from the center of the proximity light-emitting element to both sides.

In an embodiment of the present invention, the wavelength conversion line is disposed above the encapsulant or inside the encapsulant.

In an embodiment of the present invention, the light emitting structure further includes at least two connecting portions disposed on the substrate and respectively located on opposite sides of the light emitting element, wherein the top surface of each connecting portion is higher than the light emitting element for the wavelength conversion line On the connection.

In an embodiment of the present invention, the light emitting structure further includes a retaining wall surrounding the periphery of the substrate.

In an embodiment of the present invention, the wavelength conversion line includes a plurality of first wavelength conversion lines and a plurality of second wavelength conversion lines, the first wavelength conversion lines are arranged in parallel with each other, and the second wavelength conversion lines are arranged in parallel with each other, first The wavelength conversion line has a perpendicular intersection with the second wavelength conversion line and has a pitch.

In an embodiment of the present invention, the orthographic projection of each of the first wavelength conversion lines and the orthographic projection of the corresponding second wavelength conversion line are interlaced with each other.

In an embodiment of the present invention, the orthographic projection of each of the first wavelength conversion lines and the orthographic projection of the corresponding second wavelength conversion line are perpendicular to each other.

In an embodiment of the present invention, the wavelength conversion line includes a plurality of first wavelength conversion lines and a plurality of second wavelength conversion lines, and the first wavelength conversion line The second wavelength conversion lines are parallel to each other and are alternately staggered.

In an embodiment of the present invention, the first wavelength conversion line and the second wavelength conversion line have different phosphor components.

In the above-mentioned embodiment of the present invention, the wavelength conversion line provided by the light-emitting structure is kept at a distance from the light-emitting element, so that the wavelength conversion substance of the wavelength conversion line is prevented from being affected by the high temperature generated by the light-emitting element, so that the wavelength conversion material of the wavelength conversion line Has a long service life. Since the wavelength conversion lines are arranged at intervals on the light-emitting side of the light-emitting element, the amount of the wavelength-converting substance required to apply the wavelength-converting substance to the diffusion plate is generally small, and the light-emitting structure can be reduced in production. the cost of. In addition, the wavelength conversion line with different wavelength converting substances can be matched, so that the light emitting structure can accurately emit light of a specific chromaticity, that is, the arrangement density, the number of the wavelength conversion lines, and the set position can control the light emitting structure to emit light. The color and the uniformity of chromaticity.

100, 100', 500, 600, 800a, 800b‧‧‧ light-emitting structures

101‧‧‧ spacing

102‧‧‧ spacing

110‧‧‧Substrate

112‧‧‧Wire

114‧‧‧ Conductive layer

120‧‧‧Lighting elements

130‧‧‧Package colloid

140, 140'‧‧‧ wavelength conversion line

140a‧‧‧First wavelength conversion line

140b‧‧‧second wavelength conversion line

140c‧‧‧first wavelength conversion line

140d‧‧‧second wavelength conversion line

142‧‧‧Light-transmitting body

144‧‧‧ wavelength conversion substances

150‧‧‧Connecting Department

150’‧‧‧Connecting Department

160‧‧‧Retaining wall

d ₁ ‧‧‧distance

d ₂ ‧‧‧distance

d ₃ ‧‧‧distance

d ₄ ‧‧‧distance

7-7’‧‧‧ hatching

The description of the present invention and other objects, features, advantages and embodiments will be more apparent and understood. FIG. 1 is a cross-sectional view of a light emitting structure in accordance with an embodiment of the present invention.

Fig. 2 is a top view showing the light emitting structure according to Fig. 1.

3 is a cross-sectional view showing a light emitting structure according to another embodiment of the present invention.

Fig. 4A is a cross-sectional view showing an embodiment of a wavelength conversion line of the light emitting structure according to Fig. 1.

4B is a cross-sectional view showing another embodiment of a wavelength conversion line of the light emitting structure according to FIG. 1.

Figure 5 is a top plan view of a light emitting structure in accordance with still another embodiment of the present invention.

Figure 6 is a top plan view of a light emitting structure in accordance with still another embodiment of the present invention.

Figure 7 is a cross-sectional view of the light-emitting structure according to Figure 6 taken along section line 7-7'.

8A is a top view of a light emitting structure in accordance with still another embodiment of the present invention.

8B is a top view of a light emitting structure in accordance with still another embodiment of the present invention.

The spirit and scope of the present invention will be described in the following detailed description of the preferred embodiments of the present invention, which may be modified and modified by the teachings of the present invention. The spirit and scope of the new model. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessarily limiting the present invention.

Please refer to FIG. 1 and FIG. 2 . FIG. 1 is a cross-sectional view showing a light emitting structure 100 according to an embodiment of the present invention, and FIG. 2 is a drawing A top view of the light emitting structure 100 in accordance with Fig. 1 is shown. As shown in FIGS. 1 and 2, the light-emitting structure 100 is composed of a substrate 110 in which the light-emitting elements 120 are combined and a plurality of spaced-apart wavelength conversion lines 140 are applied, and then filled in a package of the encapsulant 130. In addition, when the light emitted by the light-emitting element 120 is emitted to the wavelength conversion line 140, the wavelength conversion line 140 may be excited to generate light having another wavelength, and the light generated by the wavelength conversion line 140 and the light emitted by the light-emitting element 120 may be further mixed to form a light. Light that is predetermined by the light-emitting structure 100. Since the plurality of wavelength conversion lines 140 are spaced apart to have a gap, the amount required for generally applying the wavelength converting substance to the diffusion plate of the same size is small.

The light emitting element 120 is disposed on the substrate 110 , wherein the light emitting element 120 is connected to the conductive layer 112 disposed on the substrate 110 through the wire 114 . Therefore, electrical energy can be transmitted through the conductive layer 112 and transmitted to the light emitting element 120 via the wire 114, so that the light emitting element 120 is energized to emit light. In this embodiment, the light emitting element 120 can be a light emitting diode, but is not limited thereto.

Furthermore, the encapsulant 130 of the light emitting structure 100 covers the light emitting element 120. Further, a retaining wall 160 may be formed around the substrate 110, wherein the retaining wall 160 forms an accommodating space around the substrate 110. Therefore, the encapsulant 130 can be filled in the accommodating space formed by the retaining wall 160 and encapsulate the illuminating element 120 in the accommodating space. In this embodiment, the encapsulant 130 can be an encapsulating resin, and can be a transparent colloid, but is not limited thereto.

In addition, a plurality of wavelength conversion lines 140 are arranged at intervals on the light emitting side of the light emitting element 120, and each of the wavelength conversion lines 140 and the light emitting element 120 has a pitch 101 such that the wavelength conversion material on the wavelength conversion line 140 The quality 144 (see FIG. 4A) is not affected by the heat generated by the light emission of the light-emitting element 120, and affects the lifetime of the wavelength conversion substance 144 (refer to FIG. 4A). In this embodiment, the light emitting structure 100 further includes at least two connecting portions 150 disposed in the accommodating space formed by the retaining wall 160 and located on the substrate 110 while being respectively located on opposite sides of the light emitting element 120, wherein each A top surface of a connecting portion 150 is higher than the light emitting element 120 for the wavelength conversion line 140 to be disposed thereon. In the present embodiment, the wavelength conversion line 140 is disposed on the top surface of the connecting portion 150 via a wire bonding process. Therefore, when both ends of the wavelength conversion line 140 are respectively disposed on the top surfaces of the two connection portions 150, a pitch 101 can be formed between each of the wavelength conversion lines 140 and the light-emitting elements 120.

In the present embodiment, a plurality of wavelength conversion lines 140 are provided at equal intervals in the light-emitting side of the light-emitting element 120. In addition, each of the wavelength conversion lines 140 is curved, and a vertical distance d ₁ between the wavelength conversion line 140 and the substrate 110 relative to the upper surface of the light emitting element 120 is greater than one end of each wavelength conversion line 140 and the substrate 110 The vertical distance d _{2 is} such that the path length of the light emitted by the light-emitting element 120 through the wavelength conversion line 140 is substantially the same, that is, the light intensity emitted by the light emitted from the light-emitting element 120 through the wavelength conversion line 140 can be substantially the same. In the present embodiment, by changing the curvature of the wavelength conversion line 140, the light-emitting structure 100 can have different light field distributions when it emits light.

In this embodiment, the wavelength conversion lines 140 are arranged in parallel with each other, and the distances d _{3 of the} wavelength conversion lines 140 are the same, but are not limited thereto. In addition, in the embodiment, the wavelength conversion line 140 is disposed above the encapsulant 130, but is not limited thereto.

In the embodiment, the wavelength conversion line 140 includes phosphor powder, but is not limited thereto. For example, when the light of the predetermined light emitted by the light emitting structure 100 is white light, and the light emitting element 120 is a blue light emitting element, the wavelength conversion line 140 having the yellow fluorescent powder may be disposed above the light emitting side of the light emitting element 120. The blue light emitted by the light-emitting element 120 is caused to excite the yellow fluorescent powder to generate yellow light when passing through the wavelength conversion line 140, and the blue light emitted by the mixed light-emitting element 120 and the yellow light emitted by the wavelength conversion line 140 are excited, so that the light-emitting structure 100 can be A white light that is scheduled to emit light. It should be understood that the present embodiments are merely illustrative and are not intended to limit the present invention.

Referring to FIG. 3, a cross-sectional view of a light emitting structure 100' in accordance with another embodiment of the present invention is illustrated. As shown in FIG. 3 , in the present embodiment, the wavelength conversion line 140 is disposed inside the encapsulant 130 , that is, the wavelength conversion line 140 is disposed on the top surface of the connection portion 150 and disposed inside the encapsulant 130 . At the same time, the light transmissive mesh structure 140 maintains a spacing 101 from the light emitting element 120. It should be understood that the difference between the light-emitting structure 100' of Fig. 3 and the light-emitting structure 100 of Fig. 1 is only at the position where the wavelength conversion line 140 is disposed, and the structure of the other elements is the same as that produced. Therefore, as is apparent from FIGS. 1 and 2, the wavelength conversion line 140 only needs to be disposed on the light-emitting side of the light-emitting element 120 while maintaining a pitch 101 with the light-emitting element 120. Therefore, the wavelength conversion line 140 can be disposed inside the encapsulant 130 or outside the encapsulant 130.

Referring to FIG. 4A, a cross-sectional view of an embodiment of a wavelength conversion line 140 of the light emitting structure 100 in accordance with FIG. 1 is illustrated. Each wavelength conversion line 140 has a light transmitting body 142 and a wavelength converting substance 144. In the embodiment, the wavelength converting substance 144 is coated on the outer surface of the transparent wire 142, wherein the wavelength converting substance 144 contains the fluorescent powder, and the material of the transparent wire 142 comprises polyethylene, but not limit.

In addition, please refer to FIG. 4B, which is a cross-sectional view showing another embodiment of the wavelength conversion line 140' of the light emitting structure 100 according to FIG. 1. In the present embodiment, the wavelength conversion line 140' is composed of the wavelength conversion substance 144 disposed in the light-transmitting wire body 142, wherein the wavelength conversion substance 144 contains the phosphor powder, and the material of the light-transmitting wire body 142 comprises polyethylene ( Polyethylene), but not limited to this.

Referring to FIG. 5, a top view of a light emitting structure 500 in accordance with still another embodiment of the present invention is illustrated. As shown in FIG. 5, in the present embodiment, the distance d ₄ between each wavelength conversion line 140 and the adjacent wavelength conversion line 140 is increased from the center of the light-emitting element 120 toward both sides. In other words, since the density of the wavelength conversion line 140 in the region where the light-emitting element 120 emits light is concentrated, a large number of wavelength conversion substances 144 are present in this region (see FIG. 4A). Therefore, the light of the light-emitting element 120 that is directly emitted and of higher intensity can be substantially excited by the wavelength conversion line 140 to be converted into light of another wavelength. On the other hand, the density of the wavelength conversion line 140 disposed far from the light-emitting element 120 is relatively dispersed, so that there are fewer wavelength-converting substances 144 in this region (refer to FIG. 4A).

As described above, the number of the wavelength conversion lines 140, that is, the number of the wavelength conversion substances 144 (refer to FIG. 4A) is arranged in accordance with the light emission intensity of the light emitted from the light-emitting element 120 when passing through the wavelength conversion line 140. The wavelength conversion line 140 can efficiently emit the light emitting element 120 The light is converted to light of another wavelength. Therefore, the number of different wavelength conversion lines 140 can be configured in different regions corresponding to the intensity when the light passes through the wavelength conversion line 140, so that the wavelength conversion line 140 can efficiently convert the light emitted by the light-emitting element 120 into light of another wavelength. .

Please refer to FIG. 6 and FIG. 7 . FIG. 6 is a top view of a light emitting structure 600 according to still another embodiment of the present invention, and FIG. 7 is a cross-sectional view 7 of the light emitting structure 600 according to FIG. 6 . Sectional view of -7'. As shown in FIG. 6 and FIG. 7, the wavelength conversion line 140 of the light emitting structure 600 includes a plurality of first wavelength conversion lines 140a and a plurality of second wavelength conversion lines 140b, wherein the first wavelength conversion lines 140a are arranged in parallel with each other. The second wavelength conversion lines 140b are arranged in parallel with each other. Meanwhile, the first wavelength conversion line 140a and the second wavelength conversion line 140b have a perpendicular intersection, and the first wavelength conversion line 140a and the second wavelength conversion line 140b have a Spacing 102. In this embodiment, the first wavelength conversion line 140a is disposed on the top surface of the corresponding connection portion 150, and the second wavelength conversion line 140b is disposed on the top surface of the corresponding connection portion 150', but is not limited thereto.

In the present embodiment, the orthographic projection of each of the first wavelength conversion lines 140a and the orthographic projection of the corresponding second wavelength conversion line 140b are interlaced with each other. It is further described that the orthographic projection of each of the first wavelength conversion lines 140a and the orthographic projection of the corresponding second wavelength conversion line 140b are perpendicular to each other, but are not limited thereto.

For example, when the light emitting element 120 is a blue light emitting element, and the first wavelength conversion line 140a has a red phosphor and the second wavelength conversion line 140b has a green phosphor, the blue light emitted by the light emitting element 120 can excite the first wavelength. The red phosphor of the conversion line 140a produces red light and can be excited at the same time The green phosphor of the second wavelength conversion line 140b produces green light. Further, after mixing the blue light, the red light, and the green light, a white light can be generated to serve as the color of the light that the light-emitting structure 600 has subscribed to. It should be understood that the present embodiments are merely illustrative and not intended to limit the implementation of the invention.

Please refer to FIG. 8A, which is a top view of a light emitting structure 800a according to still another embodiment of the present invention. As shown in FIG. 8A, in the embodiment, the wavelength conversion line 140 includes a plurality of first wavelength conversion lines 140c and a plurality of second wavelength conversion lines 140d. The first wavelength conversion line 140c and the second wavelength conversion line 140d are mutually connected. Parallel and equidistantly arranged, wherein the first wavelength conversion line 140c and the second wavelength conversion line 140d have different phosphor components. For example, the first wavelength conversion line 140c has green phosphor powder, and the second wavelength conversion line 140d has red phosphor powder, wherein the two second wavelength conversion lines 140d have two first wavelength conversion lines 140c therebetween. Therefore, after the first wavelength conversion line 140c and the second wavelength conversion line 140d are arranged at intervals in the above arrangement, the blue light emitting element 120 emits blue light to excite the first wavelength conversion line 140c to emit green light and the second wavelength conversion line 140d. Red light is emitted, and then red, green, and blue light are mixed to produce a light that is nearly cool white. The term "cold white light" refers to white light having a color temperature ranging from 6000 to 6500 k.

Please refer to FIG. 8B, which is a top view of a light emitting structure 800b according to still another embodiment of the present invention. As shown in FIG. 8B, in the embodiment, the wavelength conversion line 140 includes a plurality of first wavelength conversion lines 140c and a plurality of second wavelength conversion lines 140d. The first wavelength conversion line 140c and the second wavelength conversion line 140d are mutually connected. Parallel and equidistantly arranged, wherein the first wavelength is rotated The line change 140c and the second wavelength conversion line 140d have different phosphor components. For example, the first wavelength conversion line 140c has a green phosphor powder, and the second wavelength conversion line 140d has a red phosphor powder, wherein one of the second wavelength conversion lines 140d and one of the first wavelength conversion lines 140c are arranged at a staggered interval from each other. Therefore, after the first wavelength conversion line 140c and the second wavelength conversion line 140d are arranged at intervals in the above arrangement, the blue light emitting element 120 emits blue light to excite the first wavelength conversion line 140c to emit green light and the second wavelength conversion line 140d. Red light is emitted, which in turn mixes red, green, and blue light to produce a light that is nearly warm white. It should be understood that the term "warm white light" refers to white light having a color temperature ranging from 2700 to 3000 k.

As can be seen from FIGS. 8A and 8B, the color temperature of the light-emitting structures 800a/800b can be precisely controlled by the ratio or the number of the first wavelength conversion lines 140c and the second wavelength conversion lines 140d.

It can be seen from the above-mentioned embodiments that the present invention has the following advantages: the wavelength conversion line provided by the light-emitting structure and the light-emitting element are kept at a certain distance, so that the wavelength conversion substance of the wavelength conversion line is prevented from being affected by the high temperature generated by the light-emitting element, so that The wavelength converting material of the wavelength conversion line has a long service life. Since the wavelength conversion lines are arranged at intervals on the light-emitting side of the light-emitting element, the amount of the wavelength-converting substance required to apply the wavelength-converting substance to the diffusion plate is generally small, and the light-emitting structure can be reduced in production. the cost of. In addition, the wavelength conversion line with different wavelength converting substances can be matched, so that the light emitting structure can accurately emit light of a specific chromaticity, that is, the arrangement density, the number of the wavelength conversion lines, and the set position can control the light emitting structure to emit light. Color and chromaticity uniformity Performance.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention. Any one skilled in the art can make various changes and retouchings without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100‧‧‧Lighting structure

101‧‧‧ spacing

110‧‧‧Substrate

112‧‧‧Wire

114‧‧‧ Conductive layer

120‧‧‧Lighting elements

130‧‧‧Package colloid

140‧‧‧wavelength conversion line

150‧‧‧Connecting Department

160‧‧‧Retaining wall

D1‧‧‧ distance

D2‧‧‧ distance

Claims (16)

A light-emitting structure comprising: a substrate; at least one light-emitting element disposed on the substrate; an encapsulant covering the light-emitting element; and a plurality of wavelength conversion lines disposed at intervals on the light-emitting side of the light-emitting element, and each A wavelength conversion line has a spacing from the light emitting element. The light emitting structure of claim 1, wherein the wavelength conversion lines are arranged in parallel with each other. The light-emitting structure of claim 1, wherein each of the wavelength conversion lines has a light-transmitting wire body and a wavelength converting substance, and the wavelength converting material is coated on the outer surface of the light-transmitting wire body or placed in the light-transmissive layer Light in the body. The luminescent structure of claim 3, wherein the wavelength converting substance comprises a phosphor. The light-emitting structure of claim 3, wherein the material of the light-transmitting wire body comprises polyethylene. The light emitting structure of claim 1, wherein each of the wavelength conversion lines is curved. The light emitting structure according to claim 6, wherein a vertical distance of the wavelength conversion line from the upper surface of the light emitting element to the substrate is greater than a vertical distance of one end of each of the wavelength conversion lines from the substrate. The light emitting structure according to claim 1, wherein a distance between each of the wavelength conversion lines and the adjacent wavelength conversion line is increased from a center close to the light emitting element to both sides. The light emitting structure of claim 1, wherein the wavelength conversion lines are disposed above the encapsulant or inside the encapsulant. The light-emitting structure of claim 1, further comprising at least two connecting portions disposed on the substrate and respectively located on opposite sides of the light-emitting element, wherein a top surface of each of the connecting portions is higher than the light-emitting element for providing The wavelength conversion lines are disposed on the two connecting portions. The illuminating structure according to claim 1, further comprising a retaining wall surrounding the periphery of the substrate. The light emitting structure of claim 1, wherein the wavelength conversion lines comprise a plurality of first wavelength conversion lines and a plurality of second wavelength conversion lines, the first wavelength conversion lines being arranged in parallel with each other, the second wavelengths The conversion lines are arranged in parallel with each other, and the first wavelength conversion lines have perpendicular intersections with the second wavelength conversion lines and have a pitch. The illuminating structure of claim 12, wherein the orthographic projection of each of the first wavelength conversion lines and the orthographic projection corresponding to the second wavelength conversion line are interlaced with each other. The illuminating structure of claim 13, wherein the orthographic projection of each of the first wavelength conversion lines and the orthographic projection corresponding to the second wavelength conversion line are perpendicular to each other. The illuminating structure of claim 1, wherein the wavelength conversion lines comprise a plurality of first wavelength conversion lines and a plurality of second wavelength conversion lines, the first wavelength conversion lines and the second wavelength conversion lines being parallel to each other And arranged equidistantly. The illuminating structure of claim 15, wherein the first wavelength conversion lines and the second wavelength conversion lines have different phosphor components.