WO2015190242A1 - 発光デバイス - Google Patents
発光デバイス Download PDFInfo
- Publication number
- WO2015190242A1 WO2015190242A1 PCT/JP2015/064305 JP2015064305W WO2015190242A1 WO 2015190242 A1 WO2015190242 A1 WO 2015190242A1 JP 2015064305 W JP2015064305 W JP 2015064305W WO 2015190242 A1 WO2015190242 A1 WO 2015190242A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light
- light emitting
- emitting unit
- light source
- emitting device
- 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
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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
- H10H20/851—Wavelength conversion means
-
- 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
- H10H20/81—Bodies
- H10H20/811—Bodies having quantum effect structures or superlattices, e.g. tunnel junctions
-
- 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
- H10H20/852—Encapsulations
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2924/00—Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
- H01L2924/10—Details of semiconductor or other solid state devices to be connected
- H01L2924/11—Device type
- H01L2924/12—Passive devices, e.g. 2 terminal devices
- H01L2924/1204—Optical Diode
- H01L2924/12041—LED
Definitions
- the present invention relates to a light emitting device.
- Patent Document 1 describes a light-emitting device that includes a blue LED and a sealing portion that seals the blue LED and is made of a resin composition that includes quantum dots.
- the color tone of light emitted from the light emitting device does not differ depending on the light emitting direction.
- the light emitted from the light emitting device along the optical axis direction and the light emitted along the direction inclined with respect to the optical axis are required not to have different color tones. .
- the light-emitting device disclosed in Patent Document 1 contains a dispersant in the resin composition and uniformly irradiates light emitted from the blue LED to the quantum dots to improve the conversion efficiency. It has not led to improvement.
- the present invention provides a light emitting device using quantum dots and having a small color unevenness.
- the light emitting device includes a light emitting unit and a light source.
- the light emitting unit includes quantum dots.
- the light source is arranged at the center of the light emitting unit in plan view.
- the light source emits light having an excitation wavelength of the quantum dot to the light emitting unit. At least at the peripheral edge of the light emitting part, the thickness of the light emitting part gradually decreases toward the outside.
- the light-emitting device may further include a device main body having a concave portion that accommodates the light source and the light-emitting portion, and a cover member that covers the concave portion and seals the light source and the light-emitting portion together with the device main body.
- the light emission part is provided on the surface at the side of the recessed part of a cover member.
- the light-emitting device includes a first main wall portion, a second main wall portion facing the first main wall portion at an interval, a first main wall portion, and a second main wall portion. It may further include a cell having a side wall portion connected to the wall portion and arranged separately from the light source. In that case, the light emitting unit may be provided on the first or second main wall in the cell.
- the light source preferably emits divergent light to the light emitting portion.
- the light emitting section has a larger area than the light source in plan view.
- the light emitting section preferably emits mixed light of the light emission of the quantum dots and the light emitted from the light source and transmitted through the light emitting section.
- FIG. 1 is a schematic cross-sectional view of the light emitting device according to the first embodiment.
- FIG. 2 is a schematic cross-sectional view of the light emitting device according to the second embodiment.
- FIG. 3 is a schematic cross-sectional view of a light emitting device according to a third embodiment.
- FIG. 4 is a schematic cross-sectional view of a light emitting device according to a fourth embodiment.
- FIG. 5 is a schematic cross-sectional view of a light emitting device according to a fifth embodiment.
- FIG. 1 is a schematic cross-sectional view of a light emitting device 1 according to the first embodiment.
- the light emitting device 1 is a device that emits light having a wavelength different from that of the excitation light when the excitation light is incident.
- the light emitting device 1 may emit mixed light of excitation light and light generated by irradiation of excitation light.
- the light emitting device 1 has a device body 10.
- the device main body 10 includes a first member 11 and a second member 12.
- the second member 12 is provided on the first member 11.
- the second member 12 is provided with a through hole 12 a that opens to the first member 11.
- a recess 13 is formed by the through hole 12a.
- the through hole 12a tapers toward the first member 11 side. For this reason, the side wall 13 a of the recess 13 is inclined with respect to the main surface of the first member 11.
- the device body 10 may be made of any material.
- the device body 10 may be made of, for example, ceramics such as low-temperature co-fired ceramics, metal, resin, glass, or the like.
- the material constituting the first member 11 and the material constituting the second member 12 may be the same or different.
- the light source 20 is disposed on the bottom wall 13b of the recess 13 of the device body 10.
- the light source 20 can be composed of, for example, an LED (Light Emitting Diode) element, an LD (Laser Diode) element, or the like. In the present embodiment, an example in which the light source 20 is configured by LEDs will be described.
- a light emitting unit 30 is arranged in the recess 13.
- the light emitting unit 30 and the light source 20 are accommodated in the recess 13.
- the light emitting unit 30 is arranged so that light from the light source 20 enters.
- the light emitting unit 30 is provided on the surface of the cover member 40 on the concave portion 13 side.
- the light emitting unit 30 is disposed above the light source 20 so as to cover the light source 20.
- the light source 20 emits divergent light to the light emitting unit 30.
- the light source 20 emits light having an excitation wavelength of quantum dots included in the light emitting unit 30 to the light emitting unit 30.
- the light emitted from the light source 20 is not necessarily limited to the light having the excitation wavelength of the quantum dots.
- the light emitted from the light source 20 may include, for example, light of other wavelengths in addition to the light of the excitation wavelength of the quantum dots.
- the light source 20 is arranged at the center of the light emitting unit 30.
- the light source 20 is arranged so as to overlap the center line C extending in the thickness direction of the light emitting unit 30.
- the light emitting unit 30 has a larger area than the light source 20.
- the area of the light emitting unit 30 is preferably 2 to 400 times the area of the light source 20, and more preferably 20 to 75 times. If the area of the light emitting unit 30 is too small, a portion that passes through and exits the light emitting unit 30 and a portion that exits without passing through the light emitting unit 30 are likely to exist in a plan view, and uneven color tone increases. On the other hand, if the area of the light emitting unit 30 is too large, the light emitted from the light source 20 is difficult to be applied to the peripheral part of the light emitting unit 30, and the color tone unevenness increases.
- the light emitting unit 30 includes quantum dots.
- the light emitting unit 30 may include one type of quantum dot or may include a plurality of types of quantum dots.
- the quantum dot emits light having a wavelength different from that of the excitation light when the quantum dot excitation light is incident.
- the wavelength of the light emitted from the quantum dot depends on the particle diameter of the quantum dot. That is, the wavelength of the light obtained by changing the particle diameter of the quantum dots can be adjusted. For this reason, the particle diameter of a quantum dot is made into the particle diameter according to the wavelength of the light to obtain.
- the particle size of the quantum dots is usually about 2 nm to 10 nm.
- quantum dots that emits blue visible light (fluorescence with a wavelength of 440 nm to 480 nm) when irradiated with excitation light of ultraviolet to near ultraviolet with a wavelength of 300 nm to 440 nm
- the particle diameter is about 2.0 nm to 3.0 nm.
- quantum dots that emit green visible light (fluorescence having a wavelength of 500 nm to 540 nm) when irradiated with ultraviolet to near ultraviolet excitation light having a wavelength of 300 nm to 440 nm or blue excitation light having a wavelength of 440 nm to 480 nm include particle diameters.
- CdSe / ZnS microcrystals having a thickness of about 3.0 nm to 3.3 nm.
- Specific examples of quantum dots that emit yellow visible light (fluorescence having a wavelength of 540 nm to 595 nm) when irradiated with ultraviolet to near ultraviolet excitation light having a wavelength of 300 nm to 440 nm or blue excitation light having a wavelength of 440 nm to 480 nm include particle diameters.
- CdSe / ZnS microcrystals having a thickness of about 3.3 nm to 4.5 nm.
- quantum dots that emit red visible light (fluorescence with a wavelength of 600 nm to 700 nm) when irradiated with ultraviolet to near ultraviolet excitation light with a wavelength of 300 nm to 440 nm or blue excitation light with a wavelength of 440 nm to 480 nm include particle diameters.
- CdSe / ZnS microcrystals having a thickness of about 4.5 nm to 10 nm.
- the light emitting unit 30 is solid.
- the light emitting unit 30 includes a resin in which quantum dots are dispersed.
- the quantum dots are preferably dispersed substantially uniformly in the dispersion medium. By dispersing the quantum dots substantially uniformly in the dispersion medium, in-plane variation in the amount of light from the light emitting unit 30 can be suppressed.
- the resin preferably used include a silicone resin, an epoxy resin, and an acrylic resin.
- the light emitting unit 30 may further include, for example, a light dispersing agent in addition to the resin and the quantum dots.
- the light emission part 30 may be comprised by the laminated body of the multiple layers of light emitting layer.
- the plurality of light emitting layers may include a plurality of light emitting layers including quantum dots that emit light having different wavelengths.
- a stacked body of a plurality of light-emitting layers including a first light-emitting layer including quantum dots that emit light having a first wavelength and a second light-emitting layer including quantum dots that emit light having a second wavelength You may comprise the light emission part 30 by.
- the recess 13 is closed by the cover member 40.
- the cover member 40 and the device body 10 are joined.
- a sealing space 50 is defined by the cover member 40 and the device body 10.
- the light source 20 and the light emitting unit 30 are sealed in the sealed space 50.
- the light emitting part may be preferable to provide the light emitting part with a uniform thickness.
- the optical path length in the light emitting part of the light incident on the light emitting part is different between the part located immediately above the light source and the other part of the light emitting part.
- the incident angle of light to the light emitting unit is perpendicular to the portion of the light emitting unit located immediately above the light source. That is, in the portion located immediately above the light source, the incident angle of light to the light emitting portion is 0 °. Therefore, the optical path length is shortened in the portion located immediately above the light source.
- the incident angle of light to the light emitting unit increases as the distance from the light source increases in plan view. Therefore, the optical path length increases as the distance from the light source increases in plan view. For this reason, when the light emitting part has a uniform thickness, the optical path length in the light emitting part of the incident light to the light emitting part becomes longer as the distance from the light source in plan view. Therefore, in a plan view, in the portion near the light source in the light emitting unit, the amount of excitation light absorbed by the quantum dots is reduced by the amount of the optical path length, and the amount of light emitted from the quantum dots is also reduced.
- the amount of excitation light absorbed by the quantum dots increases as the optical path length increases, and the amount of light emitted from the quantum dots also increases.
- the color tone of light emitted from the light emitting unit varies depending on the position of the light emitting unit. Specifically, the color tone of light emitted from the light emitting device is different between a portion near the light source and a portion away from the light source in the plan view.
- the thickness of the light emitting unit 30 gradually decreases toward the outside at least at the peripheral portion of the light emitting unit 30. For this reason, the optical path length in the peripheral part of the light emission part 30 is short. Therefore, the difference between the optical path length in the central portion of the light emitting unit 30 and the optical path length in the peripheral portion of the light emitting unit 30 is small. Therefore, the difference between the color tone of the light emitted from the central portion of the light emitting unit 30 and the color tone of the light emitted from the peripheral portion of the light emitting unit 30 is small. Therefore, the color unevenness is small in the light emitting device 1.
- the optical path length of the light emitted from the light source in the light emitting unit 30 is substantially constant in any part of the light emitting unit 30. Therefore, for example, as in the present embodiment, it may be preferable that the thickness of the light emitting unit 30 monotonously decreases from the center in a plan view toward the outside.
- FIG. 2 is a schematic cross-sectional view of a light emitting device 1a according to the second embodiment.
- the thickness of the light emitting unit 30 is preferably monotonously decreasing from the center in plan view to the outside.
- the present invention is not limited to this configuration.
- the thickness of the portion excluding the peripheral portion of the light emitting unit 30 is substantially constant.
- the thickness of the light emitting portion 30 is gradually reduced toward the outside at the peripheral edge.
- FIG. 3 is a schematic cross-sectional view of a light emitting device 1b according to the third embodiment.
- the present invention is not limited to this configuration.
- the light emitting unit 30 is provided in the recess 13 so as to block the light source 20. Even in this case, uneven color tone can be reduced by configuring the light emitting unit 30 so that the thickness of the light emitting unit 30 gradually decreases toward the outside at least at the peripheral portion of the light emitting unit 30.
- FIG. 4 is a schematic cross-sectional view of a light emitting device 1c according to the third embodiment.
- the light emitting device 1 c includes a cell 60.
- the cell 60 has a first main wall portion 61, a second main wall portion 62, and a side wall portion 63.
- the first main wall portion 61 and the second main wall portion 62 are opposed to each other at an interval.
- the side wall portion 63 is provided between the first main wall portion 61 and the second main wall portion 62.
- the side wall portion 63 is joined to each of the first and second main wall portions 61 and 62.
- the side wall portion 63 and the first and second main wall portions 61 and 62 may be joined using, for example, anodic bonding, welding, or an inorganic bonding material.
- the first and second main wall portions 61 and 62 can be made of glass, ceramics, or the like, for example.
- the side wall 63 can be made of, for example, glass, ceramics, metal, a glass material covered with a metal coating layer, a ceramic material, or the like.
- the light emitting unit 30 is provided on the inner wall of each of the first and second main wall portions 61 and 62. Specifically, in the present embodiment, it is provided on the inner wall of the first main wall portion 61 located on the opposite side to the light source 20. But the light emission part may be provided on the inner wall of the 2nd main wall part by the side of a light source.
- the heat from the light source 20 is not easily transmitted to the light emitting unit 30 by arranging the light emitting unit 30 in the cell 60 separated from the light source 20 as in the present embodiment. Therefore, thermal degradation of the light emitting unit 30 can be suppressed.
- FIG. 5 is a schematic cross-sectional view of a light emitting device according to a fifth embodiment.
- 1st and 2nd embodiment demonstrated the example in which the sealing space 50 located between the light source 20 and the light emission part 30 was comprised by the space.
- the present invention is not limited to this configuration.
- the sealing space 50 is filled with a resin 70.
- the refractive index difference between the resin 70 and the light emitting unit 30 and the refractive index difference between the resin 70 and the light source 20 can be reduced. Therefore, the light emission efficiency can be improved.
- Resin 70 can be made of, for example, a silicone resin, an epoxy resin, an acrylic resin, or the like.
- Resin 70 may contain a light dispersing agent. In this case, the uniformity of light from the light source 20 to the light emitting unit 30 can be further enhanced.
- Light emitting device 10 Device main body 11 First member 12 Second member 12a Through hole 13 Recess 13a Side wall 13b Bottom wall 20 Light source 30 Light emitting unit 40 Cover member 50 Sealing space 60 Cell 61 First 1 main wall 62 second main wall 70 resin 63 side wall C center line
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- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
Description
図1は、第1の実施形態に係る発光デバイス1の模式的断面図である。
図2は、第2の実施形態に係る発光デバイス1aの模式的断面図である。
図3は、第3の実施形態に係る発光デバイス1bの模式的断面図である。
図4は、第3の実施形態に係る発光デバイス1cの模式的断面図である。
図5は、第5の実施形態に係る発光デバイスの模式的断面図である。
10 デバイス本体
11 第1の部材
12 第2の部材
12a 貫通孔
13 凹部
13a 側壁
13b 底壁
20 光源
30 発光部
40 カバー部材
50 封止空間
60 セル
61 第1の主壁部
62 第2の主壁部
70 樹脂
63 側壁部
C 中心線
Claims (6)
- 量子ドットを含む発光部と、
前記発光部の平面視における中央部に配されており、前記発光部に対して前記量子ドットの励起波長の光を出射する光源と、
を備え、
前記発光部の少なくとも周縁部において、前記発光部の厚みが外側に向かって漸減している、発光デバイス。 - 前記光源及び前記発光部を収容する凹部を有するデバイス本体と、
前記凹部を覆い、前記デバイス本体と共に前記光源及び前記発光部を封止するカバー部材と、
を備え、
前記発光部は、前記カバー部材の前記凹部側の表面の上に設けられている、請求項1に記載の発光デバイス。 - 第1の主壁部と、
前記第1の主壁部と間隔を置いて対向している第2の主壁部と、
前記第1の主壁部と前記第2の主壁部とを接続している側壁部と、
を有し、前記光源とは離間して配されたセルをさらに備え、
前記発光部は、前記セル内において、前記第1または第2の主壁部の上に設けられている、請求項1に記載の発光デバイス。 - 前記光源は、前記発光部に対して発散光を出射する、請求項1~3のいずれか一項に記載の発光デバイス。
- 平面視において、前記発光部は、前記光源よりも大面積である、請求項1~4のいずれか一項に記載の発光デバイス。
- 前記発光部からは、前記量子ドットの発光と、前記光源から出射されて前記発光部を透過した光との混合光が出射する、請求項1~5のいずれか一項に記載の発光デバイス。
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2016527714A JPWO2015190242A1 (ja) | 2014-06-09 | 2015-05-19 | 発光デバイス |
| KR1020167025770A KR20170016815A (ko) | 2014-06-09 | 2015-05-19 | 발광 디바이스 |
| CN201580013410.2A CN106133927A (zh) | 2014-06-09 | 2015-05-19 | 发光器件 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2014118733 | 2014-06-09 | ||
| JP2014-118733 | 2014-06-09 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015190242A1 true WO2015190242A1 (ja) | 2015-12-17 |
Family
ID=54833347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2015/064305 Ceased WO2015190242A1 (ja) | 2014-06-09 | 2015-05-19 | 発光デバイス |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPWO2015190242A1 (ja) |
| KR (1) | KR20170016815A (ja) |
| CN (1) | CN106133927A (ja) |
| TW (1) | TW201603330A (ja) |
| WO (1) | WO2015190242A1 (ja) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017224780A (ja) * | 2016-06-17 | 2017-12-21 | 日本電気硝子株式会社 | 波長変換部材及びその製造方法、並びに発光デバイス |
| KR20230039667A (ko) | 2020-07-16 | 2023-03-21 | 니폰 덴키 가라스 가부시키가이샤 | 전자장치 및 전자장치의 제조 방법 |
| KR20230039663A (ko) | 2020-07-16 | 2023-03-21 | 니폰 덴키 가라스 가부시키가이샤 | 보호캡, 전자 장치 및 보호캡의 제조 방법 |
| KR20240031317A (ko) | 2021-07-05 | 2024-03-07 | 니폰 덴키 가라스 가부시키가이샤 | 시일링 재료층 부착 유리 기판 및 기밀 패키지의 제조 방법 |
| KR20240081444A (ko) | 2021-10-22 | 2024-06-07 | 니폰 덴키 가라스 가부시키가이샤 | 보호캡, 전자 장치 및 보호캡의 제조 방법 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI823371B (zh) * | 2020-01-31 | 2023-11-21 | 日商日亞化學工業股份有限公司 | 面狀光源 |
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2015
- 2015-05-19 WO PCT/JP2015/064305 patent/WO2015190242A1/ja not_active Ceased
- 2015-05-19 CN CN201580013410.2A patent/CN106133927A/zh active Pending
- 2015-05-19 KR KR1020167025770A patent/KR20170016815A/ko not_active Withdrawn
- 2015-05-19 JP JP2016527714A patent/JPWO2015190242A1/ja active Pending
- 2015-05-29 TW TW104117511A patent/TW201603330A/zh unknown
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| WO2012102107A1 (ja) * | 2011-01-28 | 2012-08-02 | 昭和電工株式会社 | 量子ドット蛍光体を含む組成物、量子ドット蛍光体分散樹脂成形体、量子ドット蛍光体を含む構造物、発光装置、電子機器、機械装置及び量子ドット蛍光体分散樹脂成形体の製造方法 |
| US20140103384A1 (en) * | 2011-06-29 | 2014-04-17 | Panasonic Corporation | Light-emitting device |
| WO2013001687A1 (ja) * | 2011-06-30 | 2013-01-03 | パナソニック株式会社 | 発光装置 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017224780A (ja) * | 2016-06-17 | 2017-12-21 | 日本電気硝子株式会社 | 波長変換部材及びその製造方法、並びに発光デバイス |
| KR20230039667A (ko) | 2020-07-16 | 2023-03-21 | 니폰 덴키 가라스 가부시키가이샤 | 전자장치 및 전자장치의 제조 방법 |
| KR20230039663A (ko) | 2020-07-16 | 2023-03-21 | 니폰 덴키 가라스 가부시키가이샤 | 보호캡, 전자 장치 및 보호캡의 제조 방법 |
| KR20240031317A (ko) | 2021-07-05 | 2024-03-07 | 니폰 덴키 가라스 가부시키가이샤 | 시일링 재료층 부착 유리 기판 및 기밀 패키지의 제조 방법 |
| KR20240081444A (ko) | 2021-10-22 | 2024-06-07 | 니폰 덴키 가라스 가부시키가이샤 | 보호캡, 전자 장치 및 보호캡의 제조 방법 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015190242A1 (ja) | 2017-04-20 |
| TW201603330A (zh) | 2016-01-16 |
| KR20170016815A (ko) | 2017-02-14 |
| CN106133927A (zh) | 2016-11-16 |
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