WO2011021402A1 - 発光装置 - Google Patents
発光装置 Download PDFInfo
- Publication number
- WO2011021402A1 WO2011021402A1 PCT/JP2010/005155 JP2010005155W WO2011021402A1 WO 2011021402 A1 WO2011021402 A1 WO 2011021402A1 JP 2010005155 W JP2010005155 W JP 2010005155W WO 2011021402 A1 WO2011021402 A1 WO 2011021402A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light emitting
- emitting element
- phosphor
- sealing portion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/8506—Containers
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
- H10H20/851—Wavelength conversion means
- H10H20/8511—Wavelength conversion means characterised by their material, e.g. binder
- H10H20/8512—Wavelength conversion materials
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/882—Scattering means
-
- H10W90/00—
-
- H10W90/724—
Definitions
- the present invention relates to a light emitting device in which a phosphor is contained in a sealing portion for sealing a light emitting element.
- a light-emitting device in which a phosphor is contained in a sealing portion that seals a light-emitting element is known.
- the phosphor emits light whose wavelength is converted by being excited by light from the light emitting element.
- the light to the outside is a mixture of the light from the light emitting element and the light whose wavelength is converted by the phosphor. Therefore, desired light different from the light emitted from the light emitting element can be obtained by including the phosphor in the sealing portion.
- a semiconductor light-emitting device disclosed in Patent Document 1 is known as a light-emitting device containing a phosphor in such a sealing portion.
- a flip chip type light emitting element is conductively mounted on a submount element, and the light emitting element is sealed with a resin package containing a fluorescent substance for wavelength conversion.
- the wavelength conversion degree by the fluorescent material can be made uniform with respect to all directions in the light emitting direction of the light emitting element. Is.
- JP 2001-135861 A JP 2007-288125 A JP 2008-166782 A JP 2008-239677 A
- an object of the present invention is to provide a light emitting device that contains a phosphor, can easily form a sealing portion for sealing a light emitting element, and has little color unevenness.
- the light-emitting device of the present invention is a light-emitting device in which a light-emitting element is mounted on a substrate, and a phosphor is contained in a sealing portion that seals the light-emitting element.
- a light diffusing portion containing a granular material for diffusing light is provided.
- the light diffusing portion is provided on the sealing portion, the light from the light emitting element is diffused by the light diffusing portion and the uneven color can be alleviated.
- FIG. 3 is a plan view illustrating the light-emitting device according to Embodiment 1.
- Sectional view showing light-emitting element Plan view showing a light emitting element Circuit diagram showing connection between light-emitting element and Zener diode (A)-(d) is a figure which shows each process of the manufacturing method of the light-emitting device shown in FIG. (A)-(d) is a figure which shows each process of the manufacturing method of the light-emitting device shown in FIG. (A)
- (b) is a figure which shows each process of the manufacturing method of the light-emitting device shown in FIG.
- FIG. 5 is a plan view showing a light-emitting device according to Embodiment 2.
- AA line sectional view of the light emitting device shown in FIG. Schematic for explaining a color liquid crystal panel according to a second embodiment (A)-(d) is a figure which shows each process of the manufacturing method of the light-emitting device shown in FIG.
- FIG. 9 is a plan view showing a light-emitting device according to Embodiment 4. 28 is a cross-sectional view of the light emitting device shown in FIG.
- a light emitting device in which a light emitting element is mounted on a base and a phosphor is contained in a sealing portion that seals the light emitting element, light from the light emitting element is diffused on the sealing portion.
- the light diffusion part containing the granular material to be provided is provided.
- the light diffusing portion is provided on the sealing portion. Since the light from the element is diffused by the light diffusion portion, the color unevenness can be alleviated.
- the light diffusing section is characterized in that a transparent medium as a main material contains silicone dioxide as a diffusing material.
- the transparent medium can function as a light diffusing portion that diffuses light from the light emitting element.
- sealing portion is provided with a light reflecting portion that reflects light from the light emitting element on a peripheral surface other than the top surface.
- the light reflecting portion is provided on the peripheral surface excluding the top surface of the sealing portion, the light toward the peripheral surface is reflected in the directly upward direction, so that the luminance in the directly upward direction is improved.
- the entire top surface of the sealing portion can be a light emitting surface with little color unevenness.
- the light reflecting portion includes a transparent medium as a main material containing titanium dioxide as a reflecting material.
- the transparent medium can function as a light reflecting portion that reflects light from the light emitting element.
- Still another preferred embodiment is characterized in that the sealing portion is formed so that the thickness in the side surface direction is thicker than the thickness in the direction directly above the light emitting element.
- the thickness of the sealing part is constant in the direction right above the light emitting element, the thickness of the top surface of the sealing part increases as the thickness in the side surface direction increases.
- FIG. 1 is a plan view showing a light emitting device according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along line AA of the light emitting device shown in FIG. 1
- FIG. 3 is a bottom view of the light emitting device shown in FIG. Is a cross-sectional view showing the light emitting element
- FIG. 5 is a plan view showing the light emitting element
- FIG. 6 is a circuit diagram showing the connection between the light emitting element and the Zener diode.
- the light emitting device 1 includes a light emitting element 2, a Zener diode 3, a wiring substrate 4, a sealing portion 5, a light reflecting portion 6, and a light diffusing portion 7. LED (Light Emitting Diode).
- the light emitting device 1 has a rectangular shape of about 2 mm ⁇ 1.6 mm and a thickness of about 0.75 mm.
- the light-emitting element 2 is a flip-chip type light-emitting diode, and includes a substrate 21, an n-type layer 22, an active layer 23, a p-type layer 24, an n-side electrode 25, and a p-side electrode 26.
- the substrate 21 serves to hold a semiconductor layer formed from the n-type layer 22, the active layer 23, and the p-type layer 24.
- insulating sapphire can be used.
- the light emission efficiency and the light emitting part are made of gallium nitride (GaN)
- GaN gallium nitride
- the refractive index equivalent to that of the light emitting layer is reduced in order to reduce the reflection of light at the interface between the n-type layer 22 and the substrate 21. It is preferable to use GaN, SiC, AlGaN, or AlN.
- the n-type layer 22, the active layer 23, and the p-type layer 24 that become the light emitting layer are sequentially stacked on the substrate 21.
- the material of these light emitting layers is preferably a gallium nitride compound.
- the n-type layer 22 is GaN
- the active layer 23 is InGaN
- the p-type layer 24 is GaN, and the like.
- AlGaN or InGaN can also be used. It is also possible to form a buffer layer made of GaN or InGaN between the n-type layer 22 and the substrate 21.
- the active layer 23 may have a multilayer structure (quantum well structure) in which InGaN and GaN are alternately stacked.
- the n-side electrode 25 removes the active layer 23 and the p-type layer 24 from a part of the n-type layer 22, the active layer 23, and the p-type layer 24 stacked on the substrate 21, exposing the n-type layer 22, It is formed on this exposed n-type layer 22.
- the n-side electrode can be formed directly on the substrate by exposing the substrate.
- the p-side electrode 26 is formed on the p-type layer 24. That is, by removing the active layer 23 and the p-type layer 24 and exposing the n-type layer 22, the light-emitting layer, the p-side electrode 26, and the n-side electrode 25 are formed on the same surface with respect to the substrate 21.
- the p-side electrode 26 is an electrode formed of Ag, Al, Rh or the like having high reflectivity in order to reflect light emitted from the light emitting layer to the substrate 21 side.
- the n-side electrode 25 can be formed of Al, Ti, or the like. It is desirable to use Au or Al on the surfaces of the p-side electrode 26 and the n-side electrode 25 in order to increase the adhesive strength. These electrodes can be formed by vacuum deposition, sputtering, ion plating, or the like.
- the size of the light-emitting element 2 in order to increase the amount of light, it is better that the entire area is wide, and it is desirable that one side is 600 ⁇ m or more.
- the zener diode 3 functions as a protective element by being connected in parallel with a reverse polarity to the light emitting element 2 as shown in FIG. 6 so that an excessive voltage is not applied to the light emitting element 2.
- the Zener diode 3 is formed by providing a p-type semiconductor region on a part of an n-type silicone substrate.
- the Zener diode 3 is used as the protective element, but it can be simply a diode, a capacitor, a resistor, or a varistor.
- the wiring board 4 is a printed wiring board that functions as a base body in which a wiring pattern 42 is formed on an insulating substrate 41.
- the wiring pattern 42 includes a surface electrode 42a formed on the mounting surface side, a bottom electrode 42b formed on a surface opposite to the mounting surface, and a through-hole electrode 42c that connects the surface electrode 42a and the bottom electrode 42b. It has.
- the insulating substrate 41 can be a glass epoxy resin, a BT resin (bismaleimide triazine resin-based thermosetting resin), or a ceramic (alumina, aluminum nitride) substrate.
- the sealing portion 5 is formed on the entire periphery of the light emitting element 2 and the entire periphery of the Zener diode 3.
- the sealing portion 5 is formed such that the thickness in the side surface direction is thicker than the thickness in the direction directly above the light emitting element 2.
- the sealing portion 5 is obtained by dispersing inorganic or organic phosphor particles in a transparent medium which is a main material such as resin or glass. For example, when the light emitting element 2 emits blue light and the light emission color of the light emitting device 1 itself is white, the phosphor that is excited by receiving blue light from the light emitting element 2 and converts the wavelength to yellow and emits it. Is adopted.
- rare earth doped nitride or rare earth doped oxide phosphor is preferable. More specifically, rare earth doped alkaline earth metal sulfide, (Y ⁇ Sm) 3 (Al ⁇ Ga) 5 O 12 : Ce and (Y 0.39 Gd 0.57 Ce 0.03 Sm 0.01 ) 3 Al 5 O of rare earth doped garnet 12. Rare earth doped alkaline earth metal orthosilicate, rare earth doped thiogallate, rare earth doped aluminate and the like are suitable.
- silicate phosphor (Sr 1-a1-b2- x Ba al Ca b2 Eu x) 2 SiO 4 or alpha sialon ( ⁇ -sialon: Eu) Mx (Si, Al) 12 (O, N) 16 yellow It may be used as a phosphor material for light emission.
- a resin mainly composed of a silicone resin, an epoxy resin and a fluororesin, or a glass material produced by a sol-gel method can be used.
- Some glass materials have a curing reaction temperature of about 200 degrees Celsius, and can be said to be a suitable material in consideration of heat resistance of materials used for bumps and electrode portions.
- the light reflecting portion 6 disperses particles reflecting light from the light emitting element 2 in a transparent medium such as a resin such as epoxy resin, acrylic resin, polyimide resin, urea resin, silicone resin, fluorine resin, or glass. It has been made.
- the light reflecting portion 6 is formed so as to surround a peripheral surface excluding the top surface of the sealing portion 5 that seals the light emitting element 2 and the Zener diode 3.
- the light reflecting portion 6 can be formed by curing a liquid resin containing titanium oxide particles and a dispersing agent as a reflecting material that is a granular material that reflects light.
- a liquid resin containing powdered titanium oxide and a dispersant By forming the light reflecting portion 6 by hardening a liquid resin containing powdered titanium oxide and a dispersant, the light reflecting portion 6 can be provided with a reflecting function while maintaining insulation. .
- the thixotropy-imparting agent for example, fine powder silica can be used.
- titanium oxide is used as the reflective material, but aluminum oxide, silicon dioxide, boron nitride, or the like can also be used as the reflective material. That is, the reflective material can be used as long as it is a metal oxide having an insulating property and a reflective function.
- the titanium oxide is included to make the light reflecting portion 6 having both light shielding properties and reflectivity.
- SiO2 is added to the resin or other metal oxides are mixed into the resin. It can be used as a reflection part.
- the light diffusing unit 7 disperses particles that diffuse light from the light emitting element 2 in a transparent medium such as epoxy resin, acrylic resin, polyimide resin, urea resin, silicone resin, fluororesin, or a main material such as glass. It has been made.
- the light diffusion part 7 is formed on the entire top surface including the sealing part 5 and the light reflection part 6.
- SiO2 particles can be used as the granular material for diffusing light from the light emitting element 2.
- FIGS. 7 to 9 are diagrams showing each step of the method for manufacturing the light emitting device shown in FIG. In FIGS. 7A to 9A, only one light emitting device is shown.
- a substrate material 10 in which wiring boards 4 are continuously arranged in columns and rows is prepared (see FIG. 7A).
- the light emitting element 2 and the Zener diode 3 are sequentially mounted on the surface electrode 42a formed on the substrate material 10 (see FIG. 7B).
- the phosphor layer 11 that forms the sealing portion 5 that seals the light emitting element 2 and the Zener diode 3 is formed.
- the sealing portion 5 is formed by a printing method, it is easy to shorten the time.
- the sealing portion 5 is formed by the printing method, the printing plate 12 with the light emitting element 2 and the Zener diode 3 being opened is covered, and a transparent medium such as resin or glass containing phosphor is applied to the opening portion of the printing plate 12. Fill and cure (see FIG. 7C).
- the phosphor layer 11 When the phosphor layer 11 is cured, it is polished by the polishing machine 30 in order to make the top surface of the phosphor layer 11 flat (FIG. 7D). Next, the phosphor layer 11 is cut to form the light reflecting portion 6.
- the positions where the phosphor layer 11 is cut are between the light emitting element 2 and the Zener diode 3, the side surface on the light emitting element 2 side which becomes the end face by the printing plate 12 (see FIG. 7C), and the side of the Zener diode 3 side. On the side. With respect to these positions, cutting is performed by a cutting machine 31 from the top surface of the phosphor layer 11 to the mounting surface of the wiring board 4 (see FIG. 8A). By this cutting, a groove is formed between the light emitting element 2 and the Zener diode 3, both side surfaces of the phosphor layer 11 become flat surfaces, and the phosphor layer 11 becomes the sealing portion 5.
- the printing plate 13 is covered over the entire surface including the sealing portion 5, and filled with a resin or glass in which particles that reflect the light from the light emitting element 2 are dispersed and cured to form the reflective layer 14 (FIG. 8 (b)).
- the entire reflective layer 14 is polished by the polishing machine 30 until the sealing portion 5 is exposed.
- the reflective layer 14 is polished until the top surface of the sealing portion 5 is exposed, so that the remainder of the reflective layer 14 becomes the light reflecting portion 6 (FIG. 8C).
- the entire printing plate 15 including the polished sealing portion 5 and the light reflecting portion 6 is covered and filled with a resin or glass in which particles that reflect the light from the light emitting element 2 are dispersed and light diffusion is performed.
- the layer 16 is formed (see FIG. 8D).
- the light diffusing layer 16 becomes the light diffusing portion 7 by polishing the top surface of the light diffusing layer 16 with a polishing machine 30 to form a flat surface (FIG. 9A). And the board
- FIG. 10 is a diagram for explaining a use state of the light-emitting device shown in FIG.
- the blue light from the light emitting element 2 includes light traveling in the side surface direction F2 in addition to the light traveling in the direction F1 directly above the light emitting element 2.
- the light in the directly upward direction F1 reaches the light diffusion unit 7 at a short distance.
- the light in the side surface direction F ⁇ b> 2 is reflected by the light reflecting portion 6 and reaches the light diffusing portion 7. Accordingly, since the light is reflected and folded back to the light reflecting portion 6, the distance traveled in the sealing portion 5 becomes long.
- the sealing portion 5 is formed to be longer in the side surface direction F2 than in the directly upward direction F1, the light reflected on the light reflecting portion 6 travels further within the sealing portion 5. Since the transparent medium forming the sealing part 5 contains a phosphor that is excited by blue light from the light emitting element 2 and emits yellow light by wavelength conversion, the distance traveled in the sealing part 5 The longer the is, the stronger the light emission by the phosphor, and the stronger the yellowness. Therefore, at the boundary surface between the sealing portion 5 and the light diffusion portion 7, color unevenness in which the degree of yellow becomes stronger toward the periphery centering directly on the light emitting element 2.
- the light diffusing unit 7 is provided on the sealing unit 5, the light from the light emitting element 2 is diffused by the light diffusing unit 7 and alleviates color unevenness. be able to. Therefore, the light emitting device 1 with less color unevenness can be obtained.
- a micro uneven structure may be formed on the top surface of the sealing portion. By making the top surface of the sealing portion a micro uneven surface, it is possible to reduce total reflection at the top surface where the light emitting element 2 becomes the exit surface of the sealing portion. However, the minute uneven surface has low diffusibility, and color unevenness appears as it is on the exit surface. Therefore, it is desirable to form the light diffusion part 7 containing the diffusing material on the sealing part 5 in order to alleviate the color unevenness due to the phosphor.
- the sealing portion 5 is formed so that the side surface direction F2 is longer than the direct upward direction F1, a wide top surface of the sealing portion 5 can be secured, and thus a high luminous flux can be obtained.
- Example 1- The light emitting device 1 according to the present embodiment was manufactured and the luminous flux was measured. The results are shown in Table 1 below. In addition, in the sealing portion 5, the thickness D directly above the light emitting element 2 and the thickness W in the side surface direction of the light emitting element 2 are respectively changed. Inventive products 1 to 4 are thicker than the thickness D. It is a thing. For comparison, comparative products 1 and 2 having the thickness W thinner than the thickness D were also manufactured and the luminous flux was measured.
- Comparative products 1 and 2 and invention products 1 to 4 are the same except for the thickness of the sealing portion for sealing the light emitting element 2.
- the light-emitting element 2 used had a square shape with a side of 0.8 mm, and the measurement conditions were that the total luminous flux was measured with an integrating sphere at an input power of 200 mA and a pulse width of 55 msec.
- Inventions 1 to 4 in which the ratio of the thickness D in the immediately above direction of the light emitting element 2 to the thickness W in the side surface direction of the light emitting element 2 is 1.43 to 3.95 times are 0.
- the luminous flux is clearly improved compared to the comparative products of .60 times and 0.97 times.
- the light flux of the comparative product 1 and the inventive products 3 and 4 is improved by about 20% even in the light emitting element 2 having the same luminance.
- the phosphor emits light whose wavelength is converted by being excited by light from the light emitting element.
- the light to the outside is a mixture of the light from the light emitting element and the light whose wavelength is converted by the phosphor. Therefore, desired light different from the light emitted from the light emitting element can be obtained by including the phosphor in the sealing portion.
- the light emitting device described in Patent Document 2 covers an LED chip (light emitting element) that emits blue light with a phosphor layer in which a yellow phosphor and a red phosphor are mixed and dispersed in a transparent resin. A white light emission is obtained.
- LED chip light emitting element
- an amber (light blue) light emitting device is used for a turn signal or an electric bulletin board of a vehicle.
- a light emitting device that emits amber color a combination of a light emitting element that emits blue light and a phosphor that emits orange light is used.
- This amber color is an xy chromaticity diagram shown in FIG. 14, for example, (x, y) is (0.509, 0.408), (0.509, 0.49), (0.591, 0). .408) (indicated by a triangular range S1 in the figure).
- the blue light by the light emitting element and the orange light by the phosphor vary due to individual differences between the light emitting elements and the phosphor, for example, the color mixture of the blue light by the light emitting element and the orange light by the phosphor is a point D1. If the chromaticity is indicated by the following formula, an amber color with good color rendering can be obtained because it can only move in the direction of arrow F on the xy chromaticity diagram even if it is adjusted with the concentration of the phosphor emitting orange light. Absent.
- the light emitting element emits blue light for the purpose of providing a light emitting device capable of obtaining amber color with good color rendering.
- the sealing portion 5 is formed on the entire periphery of the light emitting element 2 and the entire periphery of the Zener diode 3.
- the sealing portion 5 is formed such that the thickness in the side surface direction is thicker than the thickness in the top surface direction of the light emitting element 2.
- a phosphor that emits orange light when excited by blue light from the light emitting element 2 in a transparent medium that is a main material such as resin or glass (hereinafter referred to as an orange phosphor). It is contained.
- a phosphor that is excited by blue light from the light emitting element 2 and emits red light (hereinafter referred to as a red phosphor) is dispersed. It is included.
- orange phosphor examples include (Ba, Sr) 2 SiO 4 : Eu 2+ , (Sr, Ca) 2 SiO 4 : Eu 2+ , (Ba, Sr, Ca) 2 SiO 4 : Eu 2+ , (Ba, Sr, Mg) 2 SiO 4 : Eu 2+ , (Sr, Eu 2+ , Yb) OSiO 2 , Sr 3 SiO 5 : Eu 2+ , Y 3 Al 5 O 12 : Ce, Y 3 (Al, Ga) 5 O 12 : Ce 3+ , Y 3 (Al, Gd) 5 O 12 : Ce 3+ or a combination thereof.
- These orange phosphors emit orange light having a dominant wavelength in the range of 555 to 600 nm.
- These red phosphors emit red light having a dominant wavelength in the range of 610 to 670 nm.
- the sealing portion 5 is formed by the printing method, the printing plate 12 with the light emitting element 2 and the Zener diode 3 being opened is covered, and the orange phosphor is placed on a transparent medium such as a resin or glass containing the orange phosphor. Then, after containing a red phosphor whose amount is adjusted, the opening portion of the printing plate 12 is filled and cured (see FIG. 7C).
- FIG. 11 is an xy chromaticity table for explaining the amber color.
- 12 and 13 are partially enlarged views of an xy chromaticity table showing chromaticity when a red phosphor is mixed with an orange phosphor.
- an orange fluorescent substance and a red fluorescent substance contain.
- the orange light phosphor a silicate-based fluorescence of (Ba, Sr, Ca) 2 SiO 4 : Eu 2+ or (Ba, Sr, Mg) 2 SiO 4 : Eu 2+ having a main emission wavelength of 580 to 590 nm.
- the red phosphor (Sr, Ca) AlSiN 3 : Eu 2+ having a main emission wavelength of 640 to 660 nm is used.
- the light emitting element 2 has a main wavelength of 425 to 475 nm.
- Blue light from the light emitting element 2 becomes light that travels directly to the outside and light that travels reflected by the light reflecting section 6.
- blue light excites the orange phosphor contained in the sealing portion 5 and excites the red phosphor.
- the amber color is the xy chromaticity table of FIG. 11 and (x, y) is (0.509, 0.408), (0.509, 0.49), (0.591, 0.408). ) (Indicated by a triangular range S1 in the figure) and (x, y) are (0.603, 0.397), (0.532, 0.467), (0. 522, 0.46) and (0.589, 0.393) (indicated by a rectangular range S2 in the figure), the chromaticity of light emitted by the orange phosphor is As shown in FIG. 12, the position is indicated by a point D11. That is, the point D11 is included in the triangular range S1 and is located approximately at the center on the line connecting red and green.
- the point D11 is located at a position slightly closer to the green side than the center in the rectangular range S2. Therefore, when the desired amber color is in the rectangular range S2, it may deviate in the green direction due to variations in the light emitting elements 2 and orange phosphors. Therefore, in order to secure a sufficient margin and to obtain a color with better color rendering, adjustment is made so that the chromaticity of the amber color is positioned at the center of the rectangular range S2.
- the chromaticity of the emission color of the light emitting device 1 is point D12 as shown in FIG. (Mixing ratio 9: 1), it moves in the red direction as point D13 (mixing ratio 3: 1).
- the point D13 when the mixing ratio of the orange phosphor and the red phosphor is 3: 1 can be positioned closest to the center of the rectangular range S2.
- a compounding ratio is set to 1: 1, it has already exceeded the center of the rectangular range S2, and it turns out that the red fluorescent substance is added too much.
- Phosphors used as orange phosphors are (Ba, Sr) 2 SiO 4 : Eu 2+ , (Sr, Ca) 2 SiO 4 : Eu 2+ , (Ba, Sr, Ca) 2 SiO 4 : Eu 2+.
- (Ba, Sr, Mg) 2 SiO 4 : Eu 2+ is excellent in terms of light emission efficiency because of high light emission intensity, but gradually emits light in high temperature or high humidity environments. This causes a problem of lowering. Therefore, as the orange phosphor, for example, (Sr, Eu 2+ , Yb) OSiO 2 or Sr 3 SiO 5 : Eu 2+ phosphor having a main wavelength of emission of 555 to 580 nm and high weather resistance is used. .
- the chromaticity of the light emission by the orange phosphor is at the position indicated by the point D21, and the chromaticity greatly deviates not only from the rectangular range S2 but also from the triangular range S1. . Therefore, adjustment is performed to increase the blending ratio of the red phosphor as an adjustment material for the orange phosphor.
- the point D23 (mixing ratio 3: 1) enters the triangular range S1, and when the point 24 (mixing ratio 1: 1) is set, the position closest to the center of the rectangular range S2 is not within the triangular range S1. Can be made.
- the adjustment of fine chromaticity can be performed by including the red phosphor as the adjusting material in the sealing portion 5 where adjustment is not possible with the orange phosphor alone. It becomes possible.
- both the orange phosphor and the red phosphor emit light when excited by the blue light from the light emitting element 2, but the light emitting element may emit ultraviolet light.
- the red phosphor is excited by ultraviolet rays to emit light, and a phosphor that emits blue light by ultraviolet rays can be further included in the sealing portion 5, or a sealing layer is provided in the sealing portion 5. It may be provided and contained.
- the red phosphor in addition to the orange phosphor, is contained in the same sealing part 5, but each containing sealing layer is divided and the sealing part is constituted by a plurality of layers. Also good. In that case, it is desirable to make the emission wavelength of the phosphor shorter as it goes outward with the light emitting element 2 as the center. In other words. Of the orange light phosphor and the red phosphor, it is desirable that the red phosphor is inside and the orange phosphor is outside.
- the second embodiment relates to a light emitting device capable of improving the spectral characteristics of a color filter by reducing the overlapping range of emission colors having adjacent main wavelengths, and a color liquid crystal device using the same. .
- the phosphor contained in the upper wavelength conversion material layer has a wavelength to green light that is converted to a shorter wavelength than the phosphor that converts the wavelength to red light contained in the lower wavelength conversion material layer. Therefore, the phosphor that emits green light can emit green light without loss without affecting the red light from the lower wavelength conversion material layer.
- blue light from the light emitting element red light that has been wavelength-converted by the lower wavelength conversion material layer, and green light that has been wavelength-converted by the upper wavelength conversion layer, have a main wavelength as a peak in the short wavelength direction and the long wavelength direction,
- the blue light from the light emitting element having the dominant wavelength and the green light from the upper wavelength conversion layer overlap with each other at the intermediate wavelength because the intensity attenuates so that the base of the mountain spreads. And the emission intensity increases, which may be inconvenient.
- the light emitting device described in Patent Document 3 is used as a light source of a backlight of a color liquid crystal device provided with a color filter used in a flat-screen television or the like.
- the color filter transmits only a single wavelength, but has a transmission characteristic that attenuates so that the base of the peak spreads in the short wavelength direction and long wavelength direction with the main wavelength as a peak.
- the light transmitted by the green filter transmits not only the green light from the upper wavelength conversion layer but also the long wavelength portion of the blue light from the light emitting element. Accordingly, when the green filter is transmitted with an intensity in which the short wavelength portion of green light and the long wavelength portion of blue light are mixed, there is a possibility that the balance with other colors deteriorates and the image has poor color.
- the inventors of the present application have conceived that the spectral characteristics of the color filter can be improved by reducing the overlapping range of the emission colors adjacent to each other at the main wavelength, and have reached the present embodiment.
- a first sealing of the two or more sealing parts is provided in a light emitting device in which a light emitting element is mounted on a base and two or more sealing parts are provided that sequentially cover the light emitting element as a center.
- the portion contains a phosphor that is excited by inner light from the inside of the first sealing portion and emits light having a main wavelength adjacent to the inner light, and is located outside the first sealing portion.
- the second sealing portion has a longer emission wavelength than the phosphor contained in the first sealing portion, is excited by the inner light, and has a short wavelength portion of the inner light and a shorter light from the first sealing portion.
- the light-emitting device includes a phosphor that is excited to a wavelength in a range where the wavelength portion overlaps.
- the short wavelength portion of the light by the phosphor of the first sealing portion becomes the light that excites the phosphor of the second sealing portion located outside the first sealing portion
- the short wavelength portion of light by the phosphor in one sealing portion is attenuated as a loss. Therefore, the light emission wavelength characteristic is such that the short wavelength portion of the light by the first sealing portion overlaps with the long wavelength portion of the inner light from the inside of the first sealing portion whose main wavelength is adjacent to this light.
- the overlapping range can be reduced.
- the light emitting element emits blue light
- the first sealing portion receives blue light from the light emitting element and emits green light
- the second sealing portion Is a light emitting device that emits red light in response to blue light and green light.
- the short wavelength portion of the green light from the first sealing portion becomes the light that excites the phosphor that emits the red light of the second sealing portion. Therefore, the short wavelength portion of the green light is attenuated as a loss. Therefore, the overlapping range of the short wavelength part of the green light by the 1st sealing part and the long wavelength part of the light from a light emitting element can be reduced as a characteristic of light emission wavelength.
- a color liquid crystal panel including a backlight using the light emitting device of the above embodiment as a light source and a liquid crystal panel provided with three primary color filters with the backlight disposed on the back side may be provided.
- the characteristics of the light emission wavelength are the short wavelength portion of green light by the first sealing portion and the long wavelength of light from the light emitting element.
- the overlapping range with the part can be reduced.
- FIG. 15 is a plan view showing the light emitting device according to this embodiment
- FIG. 16 is a cross-sectional view taken along line AA of the light emitting device shown in FIG. 15
- FIG. 3 is a bottom view of the light emitting device shown in FIG.
- FIG. 5 is a plan view showing the light emitting element
- FIG. 6 is a circuit diagram showing the connection between the light emitting element and the Zener diode.
- the light emitting device 1 includes a light emitting element 2, a Zener diode 3, a wiring substrate 4, a sealing portion 5, a light reflecting portion 6, and a light diffusing portion 7.
- the emitted light color is a white LED (Light Emitting Diode).
- the light emitting device 1 has a rectangular shape of about 2 mm ⁇ 1.6 mm and a thickness of about 0.75 mm.
- the light-emitting element 2 includes a substrate 21, an n-type layer 22, an active layer 23, a p-type layer 24, an n-side electrode 25, and a p-side electrode 26, and a blue color having a dominant wavelength in the range of 425 to 475 nm. It is a flip chip type light emitting diode that emits light.
- the substrate 21 serves to hold a semiconductor layer formed from the n-type layer 22, the active layer 23, and the p-type layer 24.
- insulating sapphire can be used.
- the light emission efficiency and the light emitting part are made of gallium nitride (GaN)
- GaN gallium nitride
- the refractive index equivalent to that of the light emitting layer is reduced in order to reduce the reflection of light at the interface between the n-type layer 22 and the substrate 21. It is preferable to use GaN, SiC, AlGaN, or AlN.
- the n-type layer 22, the active layer 23, and the p-type layer 24 that become the light emitting layer are sequentially stacked on the substrate 21.
- the material of these light emitting layers is preferably a gallium nitride compound.
- the n-type layer 22 is GaN
- the active layer 23 is InGaN
- the p-type layer 24 is GaN, and the like.
- AlGaN or InGaN can also be used. It is also possible to form a buffer layer made of GaN or InGaN between the n-type layer 22 and the substrate 21.
- the active layer 23 may have a multilayer structure (quantum well structure) in which InGaN and GaN are alternately stacked.
- the n-side electrode 25 removes the active layer 23 and the p-type layer 24 from a part of the n-type layer 22, the active layer 23, and the p-type layer 24 stacked on the substrate 21, exposing the n-type layer 22, It is formed on this exposed n-type layer 22.
- the n-side electrode 25 can be formed directly on the substrate by exposing the substrate.
- the p-side electrode 26 is formed on the p-type layer 24. That is, by removing the active layer 23 and the p-type layer 24 and exposing the n-type layer 22, the light-emitting layer, the p-side electrode 26, and the n-side electrode 25 are formed on the same surface with respect to the substrate 21.
- the p-side electrode 26 is an electrode formed of Ag, Al, Rh or the like having high reflectivity in order to reflect light emitted from the light emitting layer to the substrate 21 side.
- the n-side electrode 25 can be formed of Al, Ti, or the like. It is desirable to use Au or Al on the surfaces of the p-side electrode 26 and the n-side electrode 25 in order to increase the adhesive strength with other elements and wires. These electrodes can be formed by vacuum deposition, sputtering, or the like.
- the size of the light-emitting element 2 in order to increase the amount of light, it is better that the entire area is wide, and it is desirable that one side is 600 ⁇ m or more.
- the Zener diode 3 is used as the protective element, but it can be simply a diode, a capacitor, a resistor, or a varistor.
- the wiring board 4 is a printed wiring board that functions as a base body in which a wiring pattern 42 is formed on an insulating substrate 41.
- the wiring pattern 42 includes a surface electrode 42a formed on the mounting surface side, a bottom electrode 42b formed on a surface opposite to the mounting surface, and a through-hole electrode 42c that connects the surface electrode 42a and the bottom electrode 42b. It has.
- the insulating substrate 41 can be a glass epoxy resin, a BT resin (bismaleimide triazine resin-based thermosetting resin), or a ceramic (alumina, aluminum nitride) substrate.
- the sealing portion 5 is formed on the entire periphery of the light emitting element 2 and the entire periphery of the Zener diode 3.
- the sealing portion 5 is obtained by dispersing inorganic or organic phosphor particles in a transparent medium which is a main material such as resin or glass.
- the sealing portion 5 is composed of two sealing portions that sequentially cover the light emitting element.
- the two sealing parts 5 are formed of a first sealing part 51 located on the inner side and a second sealing part 52 located on the outer side of the first sealing part 51.
- the first sealing portion 51 contains a phosphor that emits green light having a dominant wavelength of 510 to 550 nm, preferably 525 to 530 nm, when excited by blue light from the adjacent light emitting element 2.
- a phosphor that emits green light having a dominant wavelength of 510 to 550 nm, preferably 525 to 530 nm, when excited by blue light from the adjacent light emitting element 2.
- phosphors (Ba, Sr) 2 SiO 4 : Eu 2+ , (Sr, Ca) 2 SiO 4 : Eu 2+ , (Ba, Sr, Ca) 2 SiO 4 : Eu 2+ , (Ba, Sr) , Mg) 2 SiO 4 : Eu 2+ , CaSc 2 O 4 : Ce, and the like can be used.
- the second sealing part 52 is excited by the light from the light emitting element 2 and the green light from the first sealing part 51, so that the dominant wavelength becomes 610 nm to 670 nm, preferably 640 nm to 660 nm in red. It contains a phosphor that emits light.
- the phosphor CaAlSiN 3 : Eu 2+ , (Sr, Ca) AlSiN 3 : Eu 2+ , Sr 2 Si 5 N 3 : Eu 2+ can be used.
- a resin mainly composed of a silicone resin, an epoxy resin and a fluororesin, or a glass material produced by a sol-gel method can be used.
- Some glass materials have a curing reaction temperature of about 200 degrees Celsius, and can be said to be a suitable material in consideration of heat resistance of materials used for bumps and electrode portions.
- the light reflecting portion 6 disperses particles reflecting light from the light emitting element 2 in a transparent medium such as a resin such as epoxy resin, acrylic resin, polyimide resin, urea resin, silicone resin, fluorine resin, or glass. It has been made.
- the light reflecting portion 6 is formed so as to surround a peripheral surface excluding the top surface of the sealing portion 5 that seals the light emitting element 2 and the Zener diode 3.
- the light reflecting portion 6 can be formed by curing a liquid resin containing titanium oxide particles and a dispersing agent as a reflecting material that is a granular material that reflects light.
- a liquid resin containing powdered titanium oxide and a dispersant By forming the light reflecting portion 6 by hardening a liquid resin containing powdered titanium oxide and a dispersant, the light reflecting portion 6 can be provided with a reflecting function while maintaining insulation. .
- the thixotropy-imparting agent for example, fine powder silica can be used.
- titanium oxide is used as the reflective material, but aluminum oxide, silicon dioxide, boron nitride, or the like can also be used as the reflective material. That is, the reflective material can be used as long as it is a metal oxide having an insulating property and a reflective function.
- the light reflecting portion 6 having both insulating properties and reflectivity is obtained.
- SiO 2 is added to the resin, or other metal oxides are mixed into the resin. It is possible to make it a reflection part.
- the light diffusing unit 7 disperses particles that diffuse light from the light emitting element 2 in a transparent medium such as epoxy resin, acrylic resin, polyimide resin, urea resin, silicone resin, fluororesin, or a main material such as glass. It has been made.
- the light diffusion part 7 is formed on the entire top surface including the sealing part 5 and the light reflection part 6.
- SiO 2 particles can be used as the granular material for diffusing light from the light emitting element 2.
- the color liquid crystal device 100 is a liquid crystal display device used for a television or a car navigation device in which the light emitting device 1 is arranged as a light source of a backlight in a row and row on a wiring board 101 and arranged on the back side of the liquid crystal panel 102. It is.
- the color filters 103 of the three primary colors of red, green and blue are arranged in a dot matrix corresponding to the liquid crystal cells (not shown).
- the red filter 103a of the color filter 103 has a maximum transmittance characteristic at 600 to 670 nm.
- the green filter 103b has a maximum transmittance characteristic at 510 to 550 nm.
- the blue filter 103c has a maximum transmittance characteristic at 425 to 475 nm.
- a light guide plate is not provided as a backlight, but the liquid crystal panel 102 may be configured to irradiate light from the light emitting device 1 via the light guide plate.
- FIGS. 18 to 20 are diagrams showing each step of the manufacturing method of the light emitting device shown in FIG. 18A to 20D, only one light emitting device is illustrated.
- a substrate material 10 is prepared in which wiring boards 4 are continuously arranged in columns and rows (see FIG. 18A).
- the light emitting element 2 and the Zener diode 3 are sequentially mounted on the surface electrode 42a formed on the substrate material 10 (see FIG. 18B).
- the first phosphor layer 11 to be the first sealing portion 51 that seals the light emitting element 2 and the Zener diode 3 is formed.
- the first sealing portion 51 is formed by a printing method, it is easy to shorten the time.
- the sealing portion 5 is formed by a printing method, the printing plate 12 is covered with a printing plate 12 in which the positions of the light emitting element 2 and the Zener diode 3 are opened, and a transparent medium such as a resin or glass containing a phosphor that emits green light. Are filled and cured (see FIG. 18C).
- the first phosphor layer 11 is polished by a polishing machine 30 in order to make the top surface of the first phosphor layer 11 flat (see FIG. 18D).
- the first phosphor layer 11 is cut to form the second sealing portion 52.
- the positions where the first phosphor layer 11 is cut are between the light emitting element 2 and the Zener diode 3, the side surface on the light emitting element 2 side which becomes the end face by the printing plate 12 (see FIG. 18C), and the Zener diode 3. It is the side of the side.
- the cutting machine 31 cuts from the top surface of the first phosphor layer 11 to the mounting surface of the wiring board 4 (see FIG. 19A). By this cutting, a groove is formed between the light emitting element 2 and the Zener diode 3, both side surfaces of the first phosphor layer 11 become flat surfaces, and the first phosphor layer 11 becomes the first sealing portion 51.
- the printing plate 13 is covered on the entire surface including the first sealing portion 51, and a transparent medium such as a resin or glass containing a phosphor that emits red light is filled in the opening portion of the printing plate 13 and cured.
- a transparent medium such as a resin or glass containing a phosphor that emits red light is filled in the opening portion of the printing plate 13 and cured.
- Two phosphor layers 14 are formed (see FIG. 19B).
- the second phosphor layer 14 is polished by a polishing machine 30 to make the top surface of the second phosphor layer 14 flat (see FIG. 19C).
- the second phosphor layer 14 is cut to form the light reflecting portion 6.
- the positions where the second phosphor layer 14 is cut are between the light emitting element 2 and the Zener diode 3, the side surface on the light emitting element 2 side which becomes the end face by the printing plate 13 (see FIG. 19B), and the Zener diode 3. This is a side surface (see FIG. 19A).
- a cutting machine 31 cuts from these positions to the mounting surface of the wiring board 4 from the top surface of the second phosphor layer 14. By this cutting, a groove is formed in the second phosphor layer 14 between the light emitting element 2 and the Zener diode 3, both side surfaces of the second phosphor layer 14 become flat surfaces, and the second phosphor layer 14 is sealed in the second seal.
- a stop 52 is formed.
- the printing plate 15 is covered over the entire surface including the second sealing portion 52, and the reflective layer 16 is formed by filling and curing a resin or glass in which particles that reflect the light from the light emitting element 2 are dispersed. (See FIG. 20 (a)).
- the entire reflective layer 16 is polished by the polishing machine 30 until the second sealing portion 52 is exposed.
- the remainder of the reflective layer 16 becomes the light reflecting portion 6 (see FIG. 20B). Since a groove is formed in the second phosphor layer 14 between the light emitting element 2 and the Zener diode 3 in advance, the light reflecting portion 6 surrounding the entire periphery of the light emitting element 2 can be formed. Light emitted from the element 2 to the side can be reflected by the light reflecting portion 6 without being obstructed by the Zener diode 3.
- the entire printing plate 17 including the polished second sealing portion 52 and the light reflecting portion 6 is covered and filled with a resin or glass in which particles that reflect the light from the light emitting element 2 are dispersed.
- the light diffusion layer 18 is formed (see FIG. 20C).
- the light diffusing layer 18 becomes the light diffusing portion 7 by polishing the top surface of the light diffusing layer 18 with a polishing machine 30 to be a flat surface (see FIG. 20D). And the board
- FIG. 21 is a graph showing the relationship between the emission wavelength of the light emitting device shown in FIG. 15 and the transmission wavelength of the color filter.
- Blue light from the light emitting element 2 becomes light that travels directly from the first sealing portion 51 to the second sealing portion 52 and light that reflects and travels by the light reflecting portion 6.
- the blue light from the light emitting element 2 serving as the inner light excites the phosphor contained in the first sealing portion 51 and is wavelength-converted to green.
- the green light from the phosphor of the first sealing portion 51 proceeds to the second sealing portion 52 together with the blue light from the light emitting element 2.
- the second sealing portion 52 not only the blue light from the light emitting element 2 excites the phosphor contained in the second sealing portion 52, but also the green light from the first sealing portion 51 of 470 to 530 nm. Red light is emitted when excited by light of a short wavelength portion.
- the short wavelength portion of the green light when used for exciting the phosphor emitting red light, the short wavelength portion of the green light due to the phosphor of the first sealing portion 51 is attenuated and attenuated. Therefore, as the characteristics of the emission wavelength shown in FIG. 11, the short wavelength portion of the green light by the first sealing portion 51 and the long wavelength portion of the blue light from the light emitting element 2 that becomes the light from the inside of the first sealing portion. Can be reduced (the hatched portion in FIG. 21 indicates a range in which no overlap occurs).
- a narrow characteristic is obtained as green light in a predetermined wavelength range by reducing the overlapping range of the short wavelength portion of green light and the long wavelength portion of blue light. Therefore, in the color liquid crystal device 100 shown in FIG. 17 in which the light emitting device 1 is used as the light source of the backlight, the light transmitted through the green filter 103b can be in a narrower wavelength range, so that the spectral characteristics can be improved. Display screen with good color and contrast.
- the first sealing portion 51 containing the phosphor that emits green light located inside, and the first sealing portion 51.
- the emission color is set to white by the second sealing portion 52 that contains the phosphor that emits red light, located outside, the emission color of the light emitting element and the emission color of the phosphor can be other combinations. .
- the light emitting element emits ultraviolet light
- the first sealing portion contains a phosphor that emits green light by ultraviolet light
- the second sealing portion contains a phosphor that emits red light by ultraviolet light
- the emission color white by providing a third sealing portion further inside the first sealing portion and including a phosphor that emits blue light by ultraviolet rays serving as inner light.
- the emission wavelength of the phosphor contained in the sealing portion located on the inner side is the sealing wavelength located on the outer side of the sealing portion.
- the stop part should just contain the fluorescent substance with longer emission wavelength than the fluorescent substance of an inner sealing part.
- the color liquid crystal device is a liquid crystal display device, but may be a projection device such as a liquid crystal projector.
- Embodiment 3 relates to a light-emitting device capable of achieving high luminance by sealing a light-emitting element with a sealing material having high heat resistance.
- Epoxy resins are excellent in terms of ease of handling, moldability, and cost, but have disadvantages such as yellowing due to ultraviolet rays and blue light and low heat resistance. Silicone resin is stronger in ultraviolet light and blue light than epoxy resin and has excellent heat resistance. Therefore, it seals light emitting elements that emit white light by emitting ultraviolet light or blue light and mixing with the emission color of the phosphor. It is a material suitable as a stopper.
- Patent Document 4 A light-emitting device using such a silicone resin as a sealing material for a light-emitting element is described in Patent Document 4, for example.
- the temperature of the silicone resin exceeds 150 ° C.
- the hardness changes, and defects such as cracks and collapse start to occur.
- the temperature may rise from 150 ° C. by flowing a large current.
- the silicone resin is placed at a high temperature, it oxidizes to generate formaldehyde and low molecular siloxane. Thereby, the transmittance
- Light-emitting devices are expected to increase in demand as light sources for lighting devices and display devices have a longer life compared to fluorescent lamps and light bulbs and power savings. Expected to be pictured.
- the inventors of the present application have conceived that high luminance can be achieved by sealing the light emitting element using a sealing material having high heat resistance, and the present embodiment has been achieved.
- a step of forming a sealing layer for sealing the light-emitting element, and a step of forming a resin material on the sealing layer and then curing to form at least one resin layer This is a method for manufacturing a light emitting device.
- the encapsulant dissolved in the solvent undergoes a large volume change due to the solvent volatilizing during curing, but is cured after dropping the resin material on the encapsulating layer, and at least By forming one or more resin layers, the reduced volume can be compensated.
- the step of forming the sealing layer is characterized in that the sealing layer is formed of a sealing material containing a phosphor that emits light when excited by light from the light emitting element.
- the phosphor if the phosphor is contained in the sealing layer, the volume is reduced by volume change when the sealing layer is cured. Therefore, the dispersed phosphor is reduced in volume by the sealing layer. Accordingly, the light emitting element can be brought close to the light emitting element. Therefore, since the phosphor layer can be formed in a state where the phosphor is aggregated around the entire periphery of the light emitting element, light from the light emitting element can efficiently reach the phosphor.
- FIG. 22 is a plan view of the light emitting device according to the embodiment of the invention.
- FIG. 23 is a cross-sectional view of the light emitting device shown in FIG. 24 is a circuit diagram of the light-emitting device shown in FIG. 25 is a cross-sectional view of a light-emitting element used in the light-emitting device shown in FIG.
- FIG. 26 is a plan view of the light-emitting element shown in FIG.
- the light emitting device 100 includes a protection element 111, a light emitting element 112, a base 113, and a resin sealing portion 114.
- the protective element 111 has a light emitting element 112 conductively mounted on the upper surface cathode electrode 111a and the upper surface anode electrode 111b so that an excessive voltage is not applied to the light emitting element 112.
- Zener diode provided with A circuit diagram in which the light emitting element 112 is mounted on the protection element 111 is shown in FIG.
- the protective element 111 is the Zener diode Z, but a diode, a capacitor, a resistor, a varistor, or a printed wiring board in which a wiring pattern is formed on an insulating substrate can also be used.
- the protection element 111 is supplied with power by a bottom electrode (not shown) and a wire 115.
- the light emitting element 112 is a flip chip type light emitting diode that emits blue light, and includes a substrate 112a, an n-type layer 112b, an active layer 112c, a p-type layer 112d, A side electrode 112e and a p-side electrode 112f are provided.
- the substrate 112a serves to hold a semiconductor layer formed from the n-type layer 112b, the active layer 112c, and the p-type layer 112d.
- insulating sapphire can be used.
- the light emission efficiency and the light emitting part are made of gallium nitride (GaN)
- GaN gallium nitride
- the refractive index equivalent to that of the light emitting layer is reduced in order to reduce the reflection of light at the interface between the n-type layer 112b and the substrate 112a. It is preferable to use GaN, SiC, AlGaN, or AlN.
- the n-type layer 112b, the active layer 112c, and the p-type layer 112d to be the light emitting layer are sequentially stacked on the substrate 112a.
- the material of these light emitting layers is preferably a gallium nitride compound.
- the n-type layer 112b is GaN
- the active layer 112c is InGaN
- the p-type layer 112d is GaN, and the like.
- AlGaN or InGaN can also be used for the n-type layer 112b and the p-type layer 112d.
- a buffer layer made of GaN or InGaN can be formed between the n-type layer 112b and the substrate 112a.
- the active layer 112c may have a multilayer structure (quantum well structure) in which InGaN and GaN are alternately stacked.
- the n-side electrode 112e removes the active layer 112c and the p-type layer 112d from a part of the n-type layer 112b, the active layer 112c, and the p-type layer 112d stacked on the substrate 112a, and exposes the n-type layer 112b. It is formed on this exposed n-type layer 112b.
- the n-side electrode can be formed directly on the substrate by exposing the substrate.
- the p-side electrode 112f is formed on the p-type layer 112d. That is, by removing the active layer 112c and the p-type layer 112d and exposing the n-type layer 112b, the light-emitting layer, the p-side electrode 112f, and the n-side electrode 112e are formed on the same side of the substrate 112a.
- the p-side electrode 112f is an electrode formed of Ag, Al, Rh or the like having high reflectivity in order to reflect light emitted from the light emitting layer to the substrate 112a side.
- n-side electrode 112e can be formed of Al, Ti, or the like. It is desirable to use Au or Al on the surfaces of the p-side electrode 112f and the n-side electrode 112e in order to increase the adhesive strength with other elements and wires. These electrodes can be formed by vacuum deposition, sputtering, or the like.
- the entire area is wide, and it is desirable that one side is 600 ⁇ m or more.
- flip chip type has been described in detail as the light emitting element 112, other types of light emitting elements can also be used.
- the base body 113 is provided with a recess 113b in a base body 113a formed in a rectangular parallelepiped shape, and a protection element 111 and a light emitting element 112 are mounted on the bottom of the recess 113b.
- the base 113 is provided with a bottom cathode electrode 113v and a bottom anode electrode 113w formed of a metal film on the bottom of the base body 113a.
- the bottom cathode electrode 113v is electrically connected to the wire connection pattern 113s on the mounting surface B1 of the base body 113a on which the protection element 111 is mounted via the through-hole wiring 113x.
- the bottom anode electrode 113w is electrically connected to the die bond connection pattern 113t on the mounting surface B1 connected to the protection element 111 via the through-hole wiring 113y.
- the inner peripheral wall surface of the recess 113b of the base body 113a is formed on a reflective surface 113c having an opening area that gradually increases as the light travels from the light emitting element 112.
- the reflection surface 113c of the base body 113 will be described in detail.
- the base body 113a can be formed of, for example, Amodel (registered trademark) which is a polyphthalamide resin.
- the reflective surface 113c which is the inner peripheral wall surface of the recess 113b, is a silicon dioxide film or a two-layer film in which a silicon dioxide film is formed on an aluminum film or a silver film. It can be a close contact surface.
- the base body 113a can be made of ceramic in addition to polyphthalamide resin.
- the reflective surface 113c is made of a silicon dioxide film or a two-layer film in which a silicon dioxide film is formed on a silver film. It can be a surface.
- the reflective surface 113c is a silicon dioxide film, it can be formed by sputtering.
- the aluminum film or the silver film can be formed by vapor deposition.
- the resin sealing portion 114 includes a first resin sealing portion 114a (sealing layer) and a second resin sealing portion 114b (resin layer).
- the first resin sealing portion 114 a is sealed by covering the entire periphery of the light emitting element 112.
- the first resin sealing portion 114a contains silicon dioxide as a viscosity adjusting material.
- the first resin sealing portion 114a contains a phosphor 114x (not shown in FIG. 22) that is excited by light from the light emitting element 112 and converts the wavelength. Since the light emitting element 112 emits blue light, if the phosphor 114x emits light that is a complementary color of blue, the first resin sealing portion 114a emits white light by mixing blue and yellow. Can be made.
- the phosphor 114x is preferably a rare earth doped nitride or rare earth doped oxide phosphor.
- rare earth doped alkaline earth metal sulfide (Y ⁇ Sm) 3 (Al ⁇ Ga) 5 O 12 : Ce and (Y 0.39 Gd 0.57 Ce 0.03 Sm 0.01 ) 3 Al 5 O of rare earth doped garnet 12.
- Rare earth doped alkaline earth metal orthosilicate, rare earth doped thiogallate, rare earth doped aluminate and the like are suitable.
- silicate phosphor Sr 1-a1-b2- x Ba al Ca b2 Eu x) 2 SiO 4 or alpha sialon ( ⁇ -sialon: Eu) Mx (Si, Al) 12 (O, N) 16 yellow It may be used as a phosphor material for light emission.
- the second resin sealing portion 114b is disposed between the first resin sealing portion 114a and the outside by being disposed as a cover layer on the first resin sealing portion 114a.
- the second resin sealing portion 114b may be the same resin as the first resin sealing portion 114a.
- a silicone resin can be used.
- the second resin sealing portion 114b is formed of silicone resin, there is no problem because the light emitting element 112 is sealed by the first resin sealing portion 114a even if it contains moisture due to hygroscopicity.
- FIGS. 27A to 27E are diagrams showing manufacturing steps of the light-emitting device shown in FIG.
- a mounting process for mounting the light emitting element 112 on the base body 113 on which the protective element 111 is conductively mounted is performed.
- a sealing step is performed in which a sealing material containing a phosphor is dropped and filled into the recess 113b of the base 113 on which the protective element 111 and the light emitting element 112 are mounted (see FIG. 27A).
- the base 113 filled with the sealing material is put into a heating furnace, and the sealing material is cured (see FIG. 27B). Since the sealing material is in a state in which the alkoxysilane resin is dissolved in the solvent, the solvent is volatilized and greatly reduced in volume by being cured (see FIG. 27C).
- the volume of the sealing material that has become the first resin sealing portion 114 a is reduced by curing, so that the dispersed phosphor 114 x can be brought close to the light emitting element 112. For example, if the phosphor is evenly distributed throughout the resin sealing portion 114, the phosphor located in the upper layer of the resin sealing portion 114 is far from the light emitting element 112, and thus proceeds in the resin sealing portion 114. As a result, light having a reduced emission intensity arrives. However, in the first resin sealing portion 114a formed by reducing the volume of the sealing material, the phosphor 114x can be in a state of being aggregated around the entire periphery of the light emitting element 112. Can reach the phosphor 114x with little attenuation. Therefore, the light from the light emitting element 112 can reach the phosphor 114x efficiently with little attenuation.
- silicone resin is filled on the first resin sealing portion 114a up to the opening surface of the recess 113b by potting (see FIG. 27D). .
- the second resin sealing portion 114b is formed by filling and curing the silicone resin (see FIG. 27E). Since the sealing material forming the first resin sealing portion 114a is in a state of being dissolved in a solvent, the solvent volatilizes during curing and a large volume change occurs, but the resin material is dropped on the first resin sealing portion 114a. Then, it is cured to form the second resin sealing portion 114b, so that the reduced volume can be compensated.
- the upper surface of the base 113 and the upper surface of the second resin sealing portion 114b can be made to be a substantially flat surface, so that the light emitting device 100 is transported by a collet.
- the upper surface of the light emitting device 100 can be a stable suction surface.
- FIG. 28 is a plan view showing the light emitting device according to the present embodiment.
- 29 is a cross-sectional view of the light-emitting device shown in FIG. Note that in this embodiment mode, a light-emitting element having the same structure as that shown in FIGS. 22 and 23 can be used, so the same reference numerals are given in FIGS. 28 and 29 and description thereof is omitted.
- a protective element 222 and a light emitting element 112 are mounted on a base 221 which is a rectangular printed wiring board.
- the base 221 is provided with a bottom cathode electrode 221v and a bottom anode electrode 221w formed of a metal film on the bottom surface of a base body 221a formed of ceramic.
- the bottom cathode electrode 221v is electrically connected to the top cathode electrode 221s on the mounting surface B2 of the base body 221a on which the protection element 222 and the light emitting element 112 are mounted via a through-hole wiring 221x.
- the bottom anode electrode 221w is conductively connected to the top anode electrode 221t on the mounting surface B2 via the through-hole wiring 221y.
- the protective element 222 and the light emitting element 112 are conductively connected with the polarity of the anode and the cathode matched so as to straddle the upper surface cathode electrode 221s and the upper surface anode electrode 221t.
- the protection element 222 is a Zener diode, and has the same function as the protection element 111 (see FIGS. 22 and 23) used in the light emitting device according to Embodiment 3. The difference is that an electrode (not shown) is provided on the bottom surface of the protective element 222, and the light emitting element 112 is connected to the upper surface cathode electrode 221s and the upper surface anode electrode 221t formed on the base 221.
- the light emitting element 112 is sealed by the first resin sealing portion 223.
- the light emitting element 112 sealed by the first resin sealing portion 223 is sealed by the second resin sealing portion 224 together with the protection element 222.
- the first resin sealing portion 223 is formed of a sealing material containing silicon dioxide (not shown) as a viscosity adjusting material and a phosphor 223x.
- the first resin sealing portion 223 includes a printing plate in which an opening serving as a peripheral wall surrounding the entire periphery of the light emitting element 112 is disposed after the light emitting element 112 is mounted on the base 221, and the sealing material is disposed in the opening. It can be formed by a screen printing method in which the material is filled and leveled with a squeegee or the like.
- the opening area of this printing plate is adjusted in consideration of the volume reduction.
- the second resin sealing portion 224 may be the same resin as the first resin sealing portion 114a. However, since the volume change when cured is large, for example, a silicone resin may be used as in the first embodiment. it can.
- the second resin sealing portion 224 is provided with a printing plate in which an opening serving as a peripheral wall surrounding the entire periphery of the base 221 is disposed, and the opening is filled with resin. It can be formed by a screen printing method of molding by leveling with a squeegee or the like.
- the volume of the sealing material is reduced by thermosetting, so that the phosphor 223x dispersed in the sealing material can emit light. Since the 1st resin sealing part 223 can be formed in the state aggregated to the whole circumference
- the resin sealing portion has a two-layer structure of the first resin sealing portions 114a and 223 and the second resin sealing portions 114b and 224, but the resin layer on the light emitting element 112 side.
- the other resin layer may be used with another resin material such as a silicone resin to form one or more resin layers as necessary.
- a sealing portion for sealing the light emitting element can be easily formed, and color unevenness is small, and thus the light emitting device in which the phosphor is contained in the sealing portion for sealing the light emitting element It is suitable for.
Landscapes
- Led Device Packages (AREA)
Abstract
Description
実施の形態1に係る発光装置を図面に基づいて説明する。図1は本発明の実施の形態に係る発光装置を示す平面図、図2は図1に示す発光装置のA-A線断面図、図3は図1に示す発光装置の底面図、図4は発光素子を示す断面図、図5は発光素子を示す平面図、図6は、発光素子とツェナーダイオードとの接続を示す回路図である。
本実施の形態に係る発光装置1を作製して光束を測定した。以下の表1にその結果を示す。なお、封止部5において、発光素子2の直上方向の厚みDと、発光素子2の側面方向の厚みWをそれぞれ変更したもので、発明品1~4は厚みDより厚みWの方が厚くしたものである。比較のために、厚みDより厚みWの方を薄くした比較品1,2も作製して光束を測定した。
蛍光体は、発光素子からの光により励起されて波長変換された光を発する。外部への光は、発光素子からの光と、蛍光体により波長変換された光とが混色したものとなる。従って、蛍光体を封止部へ含有させることで、発光素子が発する光と異なる所望の光を得ることができる。
実施の形態2は、主波長が隣接する発光色の重複範囲を低減することで、カラーフィルタの分光特性を優れたものとすることができる発光装置およびこれを用いたカラー液晶装置に関するものである。
生する。
実施の形態3は、高い耐熱性を備えた封止材により発光素子を封止することで、高輝度化を図ることが可能な発光装置に関するものである。
実施の形態4に係る発光装置を図28および図29に基づいて説明する。図28は、本実施の形態に係る発光装置を示す平面図である。図29は、図28に示す発光装置の断面図である。なお、本実施の形態では、発光素子は図22および図23に示すものと同じ構成のものが使用できるので、図28および図29において同符号を付して説明を省略する。
2 発光素子
3 ツェナーダイオード
4 配線基板
5 封止部
6 光反射部
7 光拡散部
10 基板材
11 蛍光体層
12,13,15 印刷版
14 反射層
16 光拡散層
21 基板
22 n型層
23 活性層
24 p型層
25 n側電極
26 p側電極
30 研磨機
31 切削機
32 ダイサー
41 絶縁基板
42 配線パターン
42a 表面電極
42b 底面電極
42c スルーホール電極
51 第1封止部
52 第2封止部
100 発光装置
111 保護素子
111a 上面カソード電極
111b 上面アノード電極
112 発光素子
112a 基板
112b n型層
112c 活性層
112d p型層
112e n側電極
112f p側電極
113 基体
113a 基体本体
113b 凹部
113c 反射面
113s ワイヤ接続パターン
113t ダイボンド接続パターン
113v 底面カソード電極
113w 底面アノード電極
113x スルーホール配線
113y スルーホール配線
114 樹脂封止部
114a 第1樹脂封止部
114b 第2樹脂封止部
114x 蛍光体
115 ワイヤ
200 発光装置
221 基体
221a 基体本体
221s 上面カソード電極
221t 上面アノード電極
221v 底面カソード電極
221w 底面アノード電極
221x スルーホール配線
221y スルーホール配線
222 保護素子
223 第1樹脂封止部
223x 蛍光体
224 第2樹脂封止部
Claims (10)
- 発光素子が基体上に搭載され、前記発光素子を封止する封止部に蛍光体が含有された発光装置において、
前記封止部上には、前記発光素子からの光を拡散する粒状体を含有した光拡散部が設けられ、
前記封止部は、前記発光素子の直上方向の厚みより側面方向の厚みの方が厚く形成されていることを特徴とする発光装置。 - 前記発光素子は青色光を発光する素子である、請求項1に記載の発光装置。
- 前記光拡散部は、主材である透明媒体に拡散材として二酸化シリコーンを含有したものである請求項1または2に記載の発光装置。
- 前記封止部には、天面を除く周囲面に、前記発光素子からの光を反射する光反射部が設けられており、
前記光反射部は、主材である透明媒体と反射材として二酸化チタンとを有している請求項1から3のいずれか一つに記載の発光装置。 - 前記封止材は、組成式が、-(RnSiO(4-n)/2)m-(但し、式中Rはアルキル基であり、n=1,mは整数である。)で表される樹脂である請求項1に記載の発光装置。
- 前記封止部に含有され、青色光により励起されてオレンジ色光を発光する蛍光体と、
前記封止部に含有され、前記青色光と前記オレンジ色光との混色光を調整する調整材として、赤色光を発光する蛍光体とを備えたことを特徴とする請求項1または2に記載の発光装置。 - 前記オレンジ色光を発光する蛍光体は、(Ba、Sr)2SiO4:Eu2+、(Sr、Ca)2SiO4:Eu2+、(Ba、Sr、Ca)2SiO4:Eu2+、(Ba、Sr、Mg)2SiO4:Eu2+、(Sr、Eu2+、Yb)OSiO2、Sr3SiO5:Eu2+、Y3Al5O12:Ce、Y3(Al、Ga)5O12:Ce3+、Y3(Al、Gd)5O12:Ce3+のいずれかまたはこれらの組み合わせた蛍光体である請求項6に記載の発光装置。
- 前記赤色光を発光する蛍光体は、CaAlSiN3:Eu2+、(Sr、Ca)AlSiN3:Eu2+、Sr2Si5N8:Eu2+いずれかまたはこれらの組み合わせた蛍光体である請求項6または7に記載の発光装置。
- 前記封止部は第1封止部と第2封止部とを含み、
前記第1封止部には、当該第1封止部より内側からの内側光に励起され、当該内側光と隣接する主波長を有する光を発光する蛍光体が含有され、
前記第1封止部より外側に位置する前記第2封止部には、前記第1封止部に含有された蛍光体より発光波長が長く、前記内側光に励起されると共に、前記内側光の長波長部分と前記第1封止部からの光の短波長部分とが重なる範囲の波長に励起される蛍光体が含有されていることを特徴とする請求項1に記載の発光装置。 - 前記発光素子は、青色光を発光するものであり、
前記第1封止部は、前記発光素子からの青色光を受けて緑色光を発光するものであり、
前記第2封止部は、前記青色光と前記緑色光とを受けて赤色光を発光するものである請求項9に記載の発光装置。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US13/391,070 US20120146077A1 (en) | 2009-08-21 | 2010-08-20 | Light emitting device |
| JP2011527592A JPWO2011021402A1 (ja) | 2009-08-21 | 2010-08-20 | 発光装置 |
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2009-191562 | 2009-08-21 | ||
| JP2009191562 | 2009-08-21 | ||
| JP2009238069 | 2009-10-15 | ||
| JP2009-238069 | 2009-10-15 | ||
| JP2010-069648 | 2010-03-25 | ||
| JP2010069648 | 2010-03-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2011021402A1 true WO2011021402A1 (ja) | 2011-02-24 |
Family
ID=43606860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2010/005155 Ceased WO2011021402A1 (ja) | 2009-08-21 | 2010-08-20 | 発光装置 |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20120146077A1 (ja) |
| JP (1) | JPWO2011021402A1 (ja) |
| WO (1) | WO2011021402A1 (ja) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012227346A (ja) * | 2011-04-19 | 2012-11-15 | Citizen Electronics Co Ltd | 半導体発光装置 |
| JP2014112635A (ja) * | 2012-11-09 | 2014-06-19 | Nichia Chem Ind Ltd | 発光装置の製造方法および発光装置 |
| KR20140143398A (ko) * | 2012-03-19 | 2014-12-16 | 오스람 옵토 세미컨덕터스 게엠베하 | 광전자 반도체 칩, 및 상기 반도체 칩을 포함한 헤드램프 |
| US9040353B2 (en) | 2012-09-18 | 2015-05-26 | Toyoda Gosei Co., Ltd. | Method for manufacturing semiconductor light emitting device |
| US9660148B2 (en) | 2013-03-25 | 2017-05-23 | Nichia Corporation | Method for manufacturing light emitting device, and light emitting device |
| JP2017168767A (ja) * | 2016-03-18 | 2017-09-21 | 豊田合成株式会社 | 発光装置および発光装置の製造方法 |
| US9865779B2 (en) | 2015-09-30 | 2018-01-09 | Nichia Corporation | Methods of manufacturing the package and light-emitting device |
| JP2023525972A (ja) * | 2020-05-19 | 2023-06-20 | プレッシー・セミコンダクターズ・リミテッド | モノリシックrgbマイクロledディスプレイ |
| JP2023142482A (ja) * | 2022-03-25 | 2023-10-05 | 日東電工株式会社 | 表示体および光半導体素子封止用シート |
| JP2024085446A (ja) * | 2022-12-15 | 2024-06-27 | 日亜化学工業株式会社 | 発光装置 |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013135082A (ja) * | 2011-12-26 | 2013-07-08 | Toyoda Gosei Co Ltd | 発光装置 |
| JP2013135083A (ja) * | 2011-12-26 | 2013-07-08 | Toyoda Gosei Co Ltd | 発光装置 |
| US8664681B2 (en) * | 2012-07-06 | 2014-03-04 | Invensas Corporation | Parallel plate slot emission array |
| TWI479175B (zh) * | 2013-01-15 | 2015-04-01 | Architek Material Co Ltd | 轉換結構、影像偵測裝置以及轉換結構之製備方法 |
| DE102013202904A1 (de) * | 2013-02-22 | 2014-08-28 | Osram Opto Semiconductors Gmbh | Optoelektronisches Halbleiterbauteil und Verfahren zu seiner Herstellung |
| KR102085897B1 (ko) | 2013-06-10 | 2020-03-06 | 엘지이노텍 주식회사 | 발광 소자 및 발광 소자 패키지 |
| JP2015106641A (ja) * | 2013-11-29 | 2015-06-08 | 日亜化学工業株式会社 | 発光装置 |
| JP6176171B2 (ja) * | 2014-03-28 | 2017-08-09 | 豊田合成株式会社 | 発光装置の製造方法 |
| JP6381327B2 (ja) * | 2014-07-17 | 2018-08-29 | シチズン電子株式会社 | Led発光装置およびその製造方法 |
| US9930750B2 (en) * | 2014-08-20 | 2018-03-27 | Lumens Co., Ltd. | Method for manufacturing light-emitting device packages, light-emitting device package strip, and light-emitting device package |
| JP6648467B2 (ja) * | 2014-12-25 | 2020-02-14 | 日亜化学工業株式会社 | 発光装置 |
| CN104570481A (zh) * | 2014-12-26 | 2015-04-29 | 上海天马微电子有限公司 | 一种led光源、背光模组及液晶显示装置 |
| JP6372394B2 (ja) * | 2015-02-27 | 2018-08-15 | 豊田合成株式会社 | 発光装置 |
| DE102015105661B4 (de) * | 2015-04-14 | 2022-04-28 | OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung | Optoelektronische Vorrichtung mit einer Mischung aufweisend ein Silikon und ein fluor-organisches Additiv |
| EP3709374B1 (en) * | 2015-05-29 | 2022-08-03 | Nichia Corporation | Light emitting device |
| WO2016194405A1 (ja) * | 2015-05-29 | 2016-12-08 | シチズン電子株式会社 | 発光装置およびその製造方法 |
| EP4141974A1 (en) * | 2016-03-24 | 2023-03-01 | Sony Group Corporation | Light emitting device, display apparatus, and illumination apparatus |
| KR20170124682A (ko) * | 2016-05-02 | 2017-11-13 | 삼성디스플레이 주식회사 | 표시 장치 |
| JP7064129B2 (ja) * | 2017-12-22 | 2022-05-10 | 日亜化学工業株式会社 | 発光装置 |
| EP3754386A4 (en) * | 2018-02-14 | 2021-11-17 | NGK Spark Plug Co., Ltd. | DEVICE FOR CONVERSING OPTICAL WAVELENGTHS |
| US20210074880A1 (en) * | 2018-12-18 | 2021-03-11 | Bolb Inc. | Light-output-power self-awareness light-emitting device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005019663A (ja) * | 2003-06-26 | 2005-01-20 | Nichia Chem Ind Ltd | 発光装置及びその製造方法 |
| JP2005302920A (ja) * | 2004-04-09 | 2005-10-27 | Shoei Chem Ind Co | 発光装置 |
| JP2007070600A (ja) * | 2005-08-11 | 2007-03-22 | Asahi Kasei Corp | 封止材用組成物及び光学デバイス |
| JP2008505477A (ja) * | 2004-07-05 | 2008-02-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 放射線源と蛍光物質とを含む照明システム |
| JP2008135707A (ja) * | 2006-10-31 | 2008-06-12 | Toshiba Lighting & Technology Corp | 発光装置 |
| JP2008186777A (ja) * | 2007-01-31 | 2008-08-14 | Seiko Instruments Inc | 照明装置及びこれを備える表示装置 |
| JP2008280471A (ja) * | 2007-05-14 | 2008-11-20 | Sony Corp | 発光組成物及びこれを用いた光源装置並びにこれを用いた表示装置 |
| JP2009016779A (ja) * | 2007-06-05 | 2009-01-22 | Sharp Corp | 発光装置、発光装置の製造方法、電子機器および携帯電話機 |
| JP2009152482A (ja) * | 2007-12-21 | 2009-07-09 | Citizen Electronics Co Ltd | 反射枠付表面実装型led |
| JP2009177106A (ja) * | 2007-12-28 | 2009-08-06 | Panasonic Corp | 半導体発光装置用セラミックス部材、半導体発光装置用セラミックス部材の製造方法、半導体発光装置および表示装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5192811B2 (ja) * | 2004-09-10 | 2013-05-08 | ソウル セミコンダクター カンパニー リミテッド | 多重モールド樹脂を有する発光ダイオードパッケージ |
| KR100946015B1 (ko) * | 2007-01-02 | 2010-03-09 | 삼성전기주식회사 | 백색 발광장치 및 이를 이용한 lcd 백라이트용 광원모듈 |
| US7968899B2 (en) * | 2007-08-27 | 2011-06-28 | Avago Technologies Ecbu Ip (Singapore) Pte. Ltd. | LED light source having improved resistance to thermal cycling |
-
2010
- 2010-08-20 JP JP2011527592A patent/JPWO2011021402A1/ja active Pending
- 2010-08-20 WO PCT/JP2010/005155 patent/WO2011021402A1/ja not_active Ceased
- 2010-08-20 US US13/391,070 patent/US20120146077A1/en not_active Abandoned
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005019663A (ja) * | 2003-06-26 | 2005-01-20 | Nichia Chem Ind Ltd | 発光装置及びその製造方法 |
| JP2005302920A (ja) * | 2004-04-09 | 2005-10-27 | Shoei Chem Ind Co | 発光装置 |
| JP2008505477A (ja) * | 2004-07-05 | 2008-02-21 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 放射線源と蛍光物質とを含む照明システム |
| JP2007070600A (ja) * | 2005-08-11 | 2007-03-22 | Asahi Kasei Corp | 封止材用組成物及び光学デバイス |
| JP2008135707A (ja) * | 2006-10-31 | 2008-06-12 | Toshiba Lighting & Technology Corp | 発光装置 |
| JP2008186777A (ja) * | 2007-01-31 | 2008-08-14 | Seiko Instruments Inc | 照明装置及びこれを備える表示装置 |
| JP2008280471A (ja) * | 2007-05-14 | 2008-11-20 | Sony Corp | 発光組成物及びこれを用いた光源装置並びにこれを用いた表示装置 |
| JP2009016779A (ja) * | 2007-06-05 | 2009-01-22 | Sharp Corp | 発光装置、発光装置の製造方法、電子機器および携帯電話機 |
| JP2009152482A (ja) * | 2007-12-21 | 2009-07-09 | Citizen Electronics Co Ltd | 反射枠付表面実装型led |
| JP2009177106A (ja) * | 2007-12-28 | 2009-08-06 | Panasonic Corp | 半導体発光装置用セラミックス部材、半導体発光装置用セラミックス部材の製造方法、半導体発光装置および表示装置 |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012227346A (ja) * | 2011-04-19 | 2012-11-15 | Citizen Electronics Co Ltd | 半導体発光装置 |
| KR102069911B1 (ko) * | 2012-03-19 | 2020-01-23 | 오스람 옵토 세미컨덕터스 게엠베하 | 광전자 반도체 칩, 및 상기 반도체 칩을 포함한 헤드램프 |
| KR20140143398A (ko) * | 2012-03-19 | 2014-12-16 | 오스람 옵토 세미컨덕터스 게엠베하 | 광전자 반도체 칩, 및 상기 반도체 칩을 포함한 헤드램프 |
| US9040353B2 (en) | 2012-09-18 | 2015-05-26 | Toyoda Gosei Co., Ltd. | Method for manufacturing semiconductor light emitting device |
| JP2014112635A (ja) * | 2012-11-09 | 2014-06-19 | Nichia Chem Ind Ltd | 発光装置の製造方法および発光装置 |
| US9660148B2 (en) | 2013-03-25 | 2017-05-23 | Nichia Corporation | Method for manufacturing light emitting device, and light emitting device |
| US10461227B2 (en) | 2013-03-25 | 2019-10-29 | Nichia Corporation | Method for manufacturing light emitting device, and light emitting device |
| US9865779B2 (en) | 2015-09-30 | 2018-01-09 | Nichia Corporation | Methods of manufacturing the package and light-emitting device |
| US10367121B2 (en) | 2015-09-30 | 2019-07-30 | Nichia Corporation | Package and light-emitting device |
| JP2017168767A (ja) * | 2016-03-18 | 2017-09-21 | 豊田合成株式会社 | 発光装置および発光装置の製造方法 |
| JP2023525972A (ja) * | 2020-05-19 | 2023-06-20 | プレッシー・セミコンダクターズ・リミテッド | モノリシックrgbマイクロledディスプレイ |
| JP2023142482A (ja) * | 2022-03-25 | 2023-10-05 | 日東電工株式会社 | 表示体および光半導体素子封止用シート |
| JP2024085446A (ja) * | 2022-12-15 | 2024-06-27 | 日亜化学工業株式会社 | 発光装置 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2011021402A1 (ja) | 2013-01-17 |
| US20120146077A1 (en) | 2012-06-14 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011021402A1 (ja) | 発光装置 | |
| JP7054025B2 (ja) | 発光装置 | |
| US7884538B2 (en) | Light-emitting device | |
| US10026718B2 (en) | Light emitting device | |
| KR101180134B1 (ko) | 백색 led 및 그를 사용한 백라이트 및 액정 표시 장치 | |
| JP6524904B2 (ja) | 発光装置 | |
| JP5558665B2 (ja) | 発光装置 | |
| EP3561885B1 (en) | Light emitting device | |
| JP2007273562A (ja) | 半導体発光装置 | |
| JP2017188592A (ja) | 発光装置 | |
| WO2017164214A1 (ja) | 光源装置および発光装置 | |
| CN107408610B (zh) | 发光器件 | |
| CN108963056B (zh) | 发光装置 | |
| JP2019016780A (ja) | 発光装置 | |
| US11756939B2 (en) | Light emitting element with particular phosphors | |
| JP2014093311A (ja) | 発光装置およびその製造方法 | |
| JP4417906B2 (ja) | 発光装置及びその製造方法 | |
| JP6511887B2 (ja) | 発光装置 | |
| JP2004342782A (ja) | 発光装置及びその製造方法 | |
| US20180097155A1 (en) | Method for manufacturing light emitting device | |
| JP2011249856A (ja) | 半導体発光装置 | |
| JP6658829B2 (ja) | 発光装置の製造方法 | |
| JP2006269448A (ja) | Led | |
| JP6773166B2 (ja) | 発光装置 | |
| JP2010199629A (ja) | 半導体発光装置 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 10809748 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 2011527592 Country of ref document: JP |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 13391070 Country of ref document: US |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 10809748 Country of ref document: EP Kind code of ref document: A1 |