TW201308683A - Light emitting diode - Google Patents

Abstract

The present invention relates to a light emitting diode (LED) including a substrate, a light source arranged on the substrate, and a filter layer configured on a light path of the LED chip. The filter layer a plurality of red filter areas, green filter areas, and blue filter areas. The red filter areas, green filter areas, and blue filter areas are alternately aligned along a first direction and a second direction perpendicular to the first direction.

Description

Light-emitting diode

The invention relates to a light-emitting diode, in particular to a white light-emitting diode.

At present, some white light emitting diodes on the market use a blue light emitting diode chip and a yellow light fluorescent powder, and the yellow light generated by the yellow light fluorescent powder being excited by the blue light is mixed with the blue light not absorbed by the yellow light fluorescent powder. Get white light. However, the white light obtained by this method has insufficient color rendering properties and cannot meet specific light-emitting requirements.

In order to improve the color rendering of the light-emitting diode, some white light-emitting diodes are disposed in the same package structure in a red light-emitting diode chip, a green light-emitting diode chip, and a blue light-emitting diode chip. The green, blue and blue lights are mixed into white light. The light-emitting diode comprising the three-color light-emitting diode chip has good color rendering property. However, when the light-emitting diode is mixed with red, green and blue light, it is necessary to separately control the color light-emitting diodes. The working current of the wafer, thereby adjusting the distribution ratio of the respective colors of light, is mixed into white light, resulting in a complicated color matching of the light-emitting diode.

In view of the above, it is necessary to provide a light-emitting diode having uniform light emission and high color rendering.

A light emitting diode includes a base, a light emitting diode light source on the base, and a filter layer disposed on the light exiting path of the light emitting diode light source. The light emitting diode light source emits white light. The filter layer includes a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions, the plurality of red filter regions, green filter regions, and blue filters The sheet regions are alternately arranged in a matrix shape in the first and second directions perpendicular to each other.

The light emitted by the light emitting diode of the light emitting diode respectively excites the red, green and blue color filters to generate red light, green light, blue light and then white light, so that the light emitting diode not only emits light uniformly, Moreover, the color rendering property is good, and the light mixing of the light emitting diode is simple without additional current control to achieve the color matching purpose.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIG. 1, a light-emitting diode 10 according to a first embodiment of the present invention includes a susceptor 11, a light-emitting diode light source 12, and a filter layer 14.

The susceptor 11 includes a substrate 110, a reflective cup 112 disposed on the substrate 110, and first electrodes 114 and second electrodes 116 on both sides of the substrate 110.

The substrate 110 and the reflective cup 112 may be integrally formed of LCP (Liquid Crystal Polymer) material, or may be separately manufactured from different materials. For example, the reflective cup 112 is made of an LCP material, and the substrate 110 is a germanium substrate. Plastic substrate or ceramic substrate.

The first electrode 114 and the second electrode 116 are made of a metal material and are bent into a U shape and disposed opposite to each other on the base 11 . The first electrode 114 and the second electrode 116 are spaced apart from each other to avoid a short circuit. The first electrode 114 and the second electrode 116 each include a contact segment 1140, 1160 at the bottom of the substrate 110, a wiring segment 1142, 1162 on the top surface of the substrate 110 and exposed to the bottom of the reflective cup 112, and connection contact segments 1140, 1160 and Connection segments 1144, 1164 of wiring segments 1142, 1162. The contact segments 1140, 1160 are for connection to external circuitry (not shown) to conduct electrical energy to the wiring segments 1142, 1162 via the connection segments 1144, 1164. The wiring segments 1142, 1162 are electrically connected to the LED light source 12 to supply the electric energy required for the LED light source 12 to emit light. In the present embodiment, the segments 1142, 1162 are parallel to the contact segments 1140, 1160 and perpendicular to the connecting segments 1144, 1164.

The light emitting diode light source 12 emits white light. In the embodiment, the light emitting diode light source 12 includes a blue light emitting diode chip 121, a light transmissive package body 122 covering the blue light emitting diode chip 121, and a setting. Yellow phosphor powder 123 in the package 122. The yellow fluorescent powder 123 is excited by blue light emitted from the blue light emitting diode chip 121 to generate yellow light, which is mixed with blue light that is not absorbed by the yellow fluorescent powder 123 to obtain white light.

The blue light emitting diode chip 121 is received in the reflective cup 112 of the susceptor 11 and is fixed on the surface of the wiring segment 1142 of the first electrode 114. The two electrodes of the blue light emitting diode chip 121 are respectively connected to the wiring segments 1142, 1162 of the first electrode 114 and the second electrode 116 through the metal wires 15 to achieve electrical connection. Of course, the blue light emitting diode chip 121 can also be directly fixed to the surface of the wiring segments 1142 and 1162 of the first electrode 114 and the second electrode 116 by flip-chip without using the metal wire 15.

The package body 122 may be made of a transparent material such as polycarbonate or polymethyl methacrylate. The package body 122 is filled in the reflective cup 112 and covers the blue light emitting diode wafer 121 and a portion of the substrate 110 that is not covered by the first electrode 114 and the second electrode 116. In the embodiment, the yellow phosphor powder 123 is uniformly disposed in the package body 122.

The filter layer 14 is disposed on a surface of the package body 122 away from the light emitting diode light source 12. The filter layer 14 includes a plurality of red filter regions 140, a plurality of green filter regions 142, and a plurality of blue filter regions 144. The plurality of red filter regions 140, green filter regions 142, and blue filter regions 144 are arranged in a matrix.

In this embodiment, the red filter region 140, the green filter region 142, and the blue filter region 144 are arranged in a matrix in a mosaic pattern. As shown in FIG. 2, the red filter region 140, the green filter region 142, and the blue filter region 144 are alternately arranged in the X and Y directions, respectively, and the X direction and the Y direction are perpendicular to each other. In this embodiment, the ratio of the plurality of red filter regions 140, the plurality of green filter regions 142, and the plurality of blue filter regions 144 included in the filter layer 14 is 1:1:1. specific:

From left to right, the first filter region of the Nth (N=2n+1, n is an integer) row in the X direction is the red filter region 140 and the order is "Red Green Blue (RGB), red and green Blue (RGB)"; the first filter region of the (N+1)th row in the X direction is the blue filter region 144 and the order is "blue red green (BRG), blue red green (BRG)";

The first filter region of the Nth (N=3n+1, n is an integer) row in the Y direction is the red filter region 140 and is arranged in the order of "red blue (RB), red blue (RB)..." The first filter region of the (N+1)th row in the Y direction is the green filter region 142 and is arranged in the order of "green red (GR), green red (GR)..."; the N+2 in the Y direction The first filter area of the line is the blue filter area 144 and is arranged in the order of "blue-green (BG), blue-green (BG)...".

In the filter layer 14 disposed in this manner, any two of the same color filter regions in the X direction are not adjacent to each other, and any two of the same color filter regions in the Y direction are not adjacent to each other, thereby making each color The filter areas are evenly distributed to achieve a more uniform light mixing effect. The light-emitting diode 10 has high color rendering properties and simple light distribution. In this embodiment, the light emitting diode 10 emits a cool white light, and the light is uniform.

Referring to FIG. 3, a light emitting diode 20 of a second embodiment of the present invention is different from the light emitting diode 10 provided in the first embodiment in that the light emitting diode light source 22 includes blue light emitting in series. a diode chip 221, a red light emitting diode chip 222, and a green light emitting diode chip 223; a red filter region 240 included in the filter layer 24 disposed on the light emitting surface of the light emitting diode light source 22, The green filter region 242 and the blue filter region 244 are alternately arranged in the X and Y directions, respectively, the X direction and the Y direction are perpendicular to each other, and the red filter region 240, the green filter region 242, and the blue The filter area 244 is set to a ratio of 3:6:1, and its arrangement is shown in FIG. 4, specifically:

From left to right, the first filter region of the Nth (N=4n+1, n is an integer) row in the X direction is the green filter region 242 and the order is "green green red green green green red green blue green red" (GGRGGRGBGR), green green red red green green red green blue green red (GGRGGRGBGR)..."; the first filter area of the N+1th row in the X direction is the red filter area 240 and the order is "red green blue green" Red green green red green green (RGBGRGGRGG), red green blue green red green green red green green (RGBGRGGRGG)..."; the first filter area of the N+2th row in the X direction is the green filter area 242 and the order is "green" Red, blue, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green, green It is “green green red green green red red blue red green (GGRGGGRBRG), green green red green green green red blue red green (GGRGGGRBRG)...”;

Correspondingly, the first filter region of the Nth (N=10n+1, n is an integer) row in the Y direction is the green filter region 242 and is "green red green green (GRGG), green red green green (GRGG). The order of ...", the first filter region of the N+1th row in the Y direction is the green filter region 242 and is arranged in the order of "green green red green (GGRG), green green red green (GGRG..."; The first filter area of the N+2th row in the direction is the red filter area 240 and is arranged in the order of "red and blue red (RBBR), red and blue red (RBBR)..."; the Nth in the Y direction The first filter area of the +3 line is the green filter area 242 and is arranged in the order of "green green red green (GGRG), green green red green (GGRG)..."; the first of the N+4 lines in the Y direction The filter area is the green filter area 242 and is arranged in the order of "green red green green (GRGG), green red green green (GRGG)..."; the first filter area of the N+5th line in the Y direction is red The filter regions 240 are arranged in the order of "red green green green (RGGG), red green green green (RGGG)..."; the first filter region of the N+6th row in the Y direction is the green filter region 242 and "Green Green Green Red (GGGR), Green Green Green Red (GGGR) The order of the first filter area of the N+7th row in the Y direction is the blue filter area 244 and in the order of "blue red red blue (BRRB), blue red red blue (BRRB)..." Arrange; the first filter region of the N+8th row in the Y direction is the green filter region 242 and is arranged in the order of "green green green red (GGGR), green green green red (GGGR)..."; The first filter region of the N+9 row is the red filter region 240 and is arranged in the order of "Red Green Green Green (RGGG), Red Green Green Green (RGGG)...".

Of course, the position of the filter layer 24 can be appropriately changed on the light-emitting path of the light-emitting diode light source 22, and the distribution of the red, green, and blue filter regions can also be modified in various other ways. Repeat them one by one. Further, the light-emitting diode light sources 12, 22 may also be in other forms, such as light-exciting yellow light-emitting powder emitted by a blue light-emitting diode chip and green light-emitting powder emitting white light, or using ultraviolet light to emit a diode chip. The emitted light excites red, green, and blue fluorescent powders to emit white light.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

10, 20. . . Light-emitting diode

11. . . Pedestal

12, 22. . . Light-emitting diode source

121, 221. . . Blue light emitting diode chip

222. . . Red light emitting diode chip

223. . . Green light emitting diode chip

123. . . Yellow light fluorescent powder

122. . . Package

14, 24. . . Filter layer

140, 240. . . Red filter area

142, 242. . . Green filter area

144, 244. . . Blue filter area

110. . . Base

112. . . Reflective cup

114. . . First electrode

116. . . Second electrode

1140, 1160. . . Contact segment

1142, 1162. . . Wiring section

1144, 1164. . . Connection segment

1 is a schematic structural view of a light emitting diode according to a first embodiment of the present invention.

FIG. 2 is a schematic view showing the arrangement of filter regions of the light-emitting diode shown in FIG. 1. FIG.

3 is a schematic structural view of a light emitting diode according to a second embodiment of the present invention.

4 is a schematic view showing the arrangement of the filter regions of the light-emitting diode shown in FIG. 3.

10. . . Light-emitting diode

11. . . Pedestal

12. . . Light-emitting diode source

121. . . Blue light emitting diode chip

222. . . Red light emitting diode chip

223. . . Green light emitting diode chip

123. . . Yellow light fluorescent powder

122. . . Package

14. . . Filter layer

140. . . Red filter area

142. . . Green filter area

144. . . Blue filter area

110. . . Base

112. . . Reflective cup

114. . . First electrode

116. . . Second electrode

1140, 1160. . . Contact segment

1142, 1162. . . Wiring section

1144, 1164. . . Connection segment

Claims (8)

A light-emitting diode includes a pedestal and a light-emitting diode light source on a pedestal, and the light-emitting diode light source emits white light, and the improvement is that a light filter is disposed on the light-emitting path of the light-emitting diode light source a layer, the filter layer includes a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions, the plurality of red filter regions, green filter regions, and blue The filter regions are alternately arranged in a matrix shape in the first and second directions perpendicular to each other. The light-emitting diode according to claim 1, wherein the base comprises a substrate and a reflective cup formed on the substrate, and the light-emitting diode light source is disposed on the substrate and located in the reflective cup. The light-emitting diode according to claim 1, wherein the light-emitting diode light source comprises a blue light-emitting diode chip disposed on the base, and a light-transmitting package covering the blue light-emitting diode chip. And a yellow fluorescent powder disposed in the package, the filter layer disposed on a side of the yellow fluorescent powder away from the blue light emitting diode chip. The illuminating diode of claim 3, wherein the pedestal comprises a substrate and a reflective cup formed on the substrate, the illuminating diode light source is disposed on the substrate and located in the reflective cup, The package is filled in the reflective cup, and the package covers the light emitting diode and the portion of the substrate that is not covered by the first electrode and the second electrode. The filter layer is disposed on the reflective cup away from the blue light. One side of the diode wafer. The light-emitting diode according to claim 1, wherein the light-emitting diode light source comprises a blue light-emitting diode chip disposed on the pedestal, a red light-emitting diode chip, and a green light-emitting diode Body wafer. The light-emitting diode of claim 1, wherein the light-emitting diode light source further comprises a blue light-emitting diode chip, a red light-emitting diode chip, and a green light-emitting diode chip. The light transmissive package has a flat plate shape and is disposed on a surface of the package. The light-emitting diode according to claim 1, wherein the filter layer includes a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions. It is 1:1:1. The light-emitting diode according to claim 1, wherein the filter layer includes a plurality of red filter regions, a plurality of green filter regions, and a plurality of blue filter regions. It is 3:6:1.