• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    light emitting device. The present invention relates to a light-emitting device whose objective is to provide a light-emitting device that has a smaller size and fewer color irregularities. the light-emitting device includes a light-emitting element whose upper surface is a light-extracting face, a light-transmitting member having an upper surface and a lower surface and covering the light-extracting face of the light-emitting element, a light transmitting member containing phosphor, a top surface and a bottom surface of the light transmitting member which are flat surfaces and parallel to each other, and a side surface of the light transmitting member having a protruding component that projects to the side and is in contact with the lower surface.
    公开号:BR112015026316B1
    申请号:R112015026316-0
    申请日:2014-03-26
    公开日:2022-01-11
    发明作者:Kunihito Sugimoto；Keisuke Sejiki；Tsukasa Tokida；Shinpei Maeda
    申请人:Koito Manufacturing Co., Ltd.；Nichia Corporation；
    IPC主号:
    专利说明:

    TECHNICAL FIELD
    [001] The present invention relates to a light-emitting device equipped with a light-transmitting member that is capable of transmitting light from a light-emitting element. BACKGROUND OF THE INVENTION
    [002] In recent years, semiconductor light-emitting elements have been used not only as light sources for use in lighting as an alternative to fluorescent lights, but also as light sources that have good directionality and high luminance, such as in automotive headlights. and others such as spotlights, projected lighting and the like.
    [003] The use of a light-emitting device was proposed in document JP2010-272847A. With such a light-emitting device, in order to obtain the highest possible luminance, the light-emitting element is covered, the outer peripheral side surface of an associated light-transmitting member is an inclined surface that spreads outward and towards the lower surface, and of this lower surface, and the inclined surface and part of this lower surface not associated with the light-emitting element are covered with a light-reflecting resin. SUMMARY OF THE INVENTION PROBLEM TO BE SOLVED
    [004] However, in the development of light-emitting devices, there is a particular need for devices that are more compact for vehicular applications and that present few color irregularities.
    [005] The present invention was conceived in view of the above problem, and its objective is to present a light emitting device that has a smaller size and less color irregularities. MEANS TO SOLVE THE PROBLEM
    [006] The light emitting device of the present invention includes
    [007] a light-emitting element whose top surface is a light-extracting face, and
    [008] a light-transmitting member having a top surface and a bottom surface, and which covers the light-extracting face of the light-emitting element,
    [009] wherein the light transmitting member contains phosphorus,
    [0010] The top surface and the bottom surface of the light transmitting member are both flat and parallel surfaces,
    [0011] The side surface of the light transmitting member has a projecting component that projects to the side and is in contact with the bottom surface. EFFECTS OF THE INVENTION
    [0012] The light-emitting device of the present invention allows further miniaturization to be carried out. A light emitting device with uniform frontal luminance and less color irregularities can be provided. BRIEF DESCRIPTION OF THE DRAWINGS
    [0013] Figure 1A is a simplified plan view of the light-emitting device in Embodiment 1 of the present invention.
    [0014] Figure 1B is a cross section along the line A-A' of Figure 1A;
    [0015] Figure 2A is a simplified plan view of the light transmitting member used in the light emitting device in Embodiment 1 of the present invention;
    [0016] Figure 2B is a cross section along line A-A' of Figure 2A;
    [0017] Figure 3A is a graph of cross-sectional data for the luminance of the light-emitting device in Embodiment 1 of the present invention;
    [0018] Figure 3B is a detailed view of part A of Figure 3A;
    [0019] Figure 4A is a simplified plan view of the light-transmitting member used in a comparative light-emitting device; and
    [0020] Figure 4B is a cross section along the line C-C' of Figure 4A. DESCRIPTION OF MODALITIES
    [0021] The sizes and arrangement relationships of the members in each of the drawings are occasionally shown in an exaggerated way to facilitate explanation. In the description below, the same designations or the same reference numbers may, in principle, denote the same member or similar members, and duplicate descriptions will appropriately be omitted. Furthermore, the constitutions described in some of the examples and modalities may be employed in other examples and modalities.
    [0022] As shown in the plan view of Figure 1A and the cross-section of Figure 1B, a light-emitting device 10 comprises light-emitting elements 1 whose upper surfaces serve as a light-extracting face, and a light-transmitting member 2 which has a top surface and a bottom surface and covers the light-extracting faces of the light-emitting elements 1. Light Emitting Elements 1
    [0023] As a light-emitting element, a light-emitting diode is usually used.
    [0024] The composition, emission color or wavelength, size, number and other items of light emitting element can be selected according to the intended use. For example, examples such as a blue or green light-emitting element include a light-emitting element that uses a semiconductor layer such as ZnSe, a nitride-based semiconductor material (In-XAlYGa1-X-YN (0< X, 0<Y, X+Y<1) and GaP; and a red light-emitting element includes a light-emitting element that uses a semiconductor layer such as GaAlAs, AlInGaP.
    [0025] The light emitting element is normally formed by laminating a semiconductor layer onto a light transmission enhancing substrate (such as a sapphire substrate). The substrate becomes the upper surface side of the light-emitting element, and serves as the light-extracting face. The substrate may have a texture on the surface where it meets the semiconductor layer. This allows light emitted from the semiconductor layer to be easily extracted to the outside of the substrate by intentionally varying the critical angle when light is applied to the substrate.
    [0026] With the light emitting element, the augmentation substrate can be removed after lamination of the semiconductor layer. Such removal can be carried out, for example, by polishing, LLO (laser detachment) or the like. In cases where the augmentation substrate is removed, the semiconductor layer closest to the substrate becomes the top surface side, and serves as the light extraction face.
    [0027] Light emitting elements preferably have a pair of positive and negative electrodes on the same side. This allows the light-emitting elements to be flip-chipped mounted on the mounting substrate. In this case, the surface that is opposite the surface on which the electrode pair is formed becomes the light extraction face.
    [0028] A single light-emitting device may include one or more light-emitting elements. In other words, one or more light-emitting elements may be covered by a single light-emitting member. Light Transmitting Member
    [0029] The light transmitting member covers the light extracting face of the light emitting element, transmits the light emitted from the light emitting element and allows that light to be released to the outside. The light transmitting member contains phosphorus.
    [0030] The light transmitting member has a top surface and a bottom surface. The lower surface covers the light-extracting face of the light-emitting element, and the upper surface serves as the light-emitting surface of the light-emitting element. Generally, for all light emitted from the light-emitting elements to be extracted, it may be necessary for the light-transmitting member to cover the entire light-extracting face of the light-emitting element. On the other hand, it was confirmed that the larger the light transmitting member in relation to the light extracting face, the greater the decrease in the luminance of the extracted light. Therefore, the upper surface of the light-transmitting member covering the light-emitting element is equal to or greater than the light-extracting faces of the light-emitting elements, but is preferably as close as possible to having the same face size. light extraction. That is, the edge of the top surface of the light-emitting member preferably coincides with the outer edge of the light-emitting element in the plan view. This not only makes it possible for the light-emitting device to be even smaller, but also allows for greater luminance.
    [0031] In the case where a plurality of light-emitting elements are covered by a single light-transmitting member, all light-extracting faces of the plurality of light-emitting elements will have to be covered by the light-transmitting member. Furthermore, the edges of the upper surface of the light-transmitting member preferably coincide with the outer edges of the group of light-emitting elements arranged on the substrate in the plan view.
    [0032] The top surface and the bottom surface of the light transmitting member are preferably flat surfaces and parallel to each other. The term parallel encompasses a situation where one of the upper and lower surfaces is permitted to be inclined by approximately ±5° to each other. Such a shape allows for a light-emitting device with few color irregularities and uniform front luminance on the upper surface of the light-transmitting member that serves as the emitting face.
    [0033] There is no particular limitation on the thickness of the light transmitting member, but it can be around 50 to 300 μm, for example.
    [0034] As shown in Figures 2A and 2B, the light transmitting member 2 has a projecting component 3 that projects to the side and is in contact with the lower surface 2b, on the side surface 2c. The expression "contacts the bottom surface 2b" means that part of the surface constituting the bottom surface 2b of the light transmitting member 2 becomes part of the surface constituting the protruding components 3. In other words, it means that the surface extending from the lower surface 2b of the light transmitting member 2 becomes part of the surface constituting the projecting components 3 so as to form the same plane as that of the lower surface 2b of the light transmitting member 2.
    [0035] The protruding components 3 of the light transmitting member 2 have not only the lower surface 2b of the light transmitting member 2, but also a vertical surface adjoining the lower surface 2b, and a surface 3b adjoining that vertical surface 3a and is parallel to the upper surface 2a of the light transmitting member 2. The projecting members 3 preferably have a second vertical surface 3c which adjoins the upper surface 2a and the surface 3b parallel to the upper surface 2a of the light transmitting member 2.
    [0036] Alternatively, in the case where the top surface of the light transmitting member 2 is textured, curved or lens-shaped, the surface adjoining the vertical surface 3a and the second vertical surface 3c is preferably parallel to the facets of extracting light from the light-emitting elements or the lower surface of the light-transmitting member 2.
    [0037] The vertical surface 3a, the second vertical surface 3c and the parallel surfaces 3b on the side surfaces 2c of the light transmitting member 2 are preferably smooth, flat surfaces which are neither angled nor curved. This allows for a uniform thickness of the light-reflecting member disposed on top of the lateral protruding components (on surfaces 3b). Therefore, there is a marked difference in luminance between the emitting part (the top surface of the light transmitting member (2a)) and the non-emitting part (the white resin that surrounds the light transmitting member (3b)), and an emitting device of light with few color irregularities can be obtained.
    [0038] The length L (see Figure 2B) of the projecting component 3 that projects to the side is about 10 to 300 μm, for example. The longer the length, all the upper surfaces of the light-emitting elements can be covered by the lower surface of the light-transmitting member, even when there is some positional displacement, in the coverage of the light-emitting elements by the light-transmitting member, as will be discussed below. . However, the greater this length, the greater the proportion to be arranged beyond the upper surfaces of the light emitting elements, which can cause color irregularities when this length is too large.
    [0039] The height H (see Figure 2B) of the components protruding from the lower surface 2b of the light transmitting member 2 is preferably about 25% of the thickness of the light transmitting member, for example. The greater the thickness, the smaller the amount of light-reflecting member placed on the protruding components, which can cause color irregularities. Also, the thinner the thickness, the greater the likelihood of splintering, and the light from the light-emitting elements will have more difficulty propagating to the upper surface.
    [0040] Thus, in the case where the light transmitting member has protruding components, a sufficient surface area can be guaranteed on the side of the lower surface to be able to receive all the light emitted from the light-emitting elements. Furthermore, on the upper surface side, i.e., on the light-extracting face side of the light-transmitting member, received light may be emitted from the same flat surface area as the light-emitting elements. As a result, the luminance can be increased.
    [0041] On the light-extracting face of the light-transmitting member, since the light output around the light-emitting part can be reduced, it is possible to provide a light-emitting device with good clarity/visibility. The term good sharpness or good visibility means that the boundary between the light-emitting portion and the non-light-emitting portion is clear, in other words, there is a distinct boundary between the emitting region and the non-emitting region, as the The luminance difference between the light-emitting portion and the non-light-emitting portion is more pronounced, the property of sharpness or visibility is improved.
    [0042] The surface area of the lower surface of the light-emitting member is greater than the surface area of the upper surfaces of the light-emitting elements. Consequently, all light-emitting faces of the light-emitting elements can be covered with the light-transmitting member, and thereby the light loss can be reduced. Furthermore, even when there may be some positional displacement in the arrangement of the light transmitting member above the light-emitting elements, since all the upper surfaces of the light-emitting elements can be covered with the lower surface of the light-transmitting member, this shift will cause almost no change in luminance. As a result, the yield will be higher in the manufacture of light-emitting devices. Furthermore, as will be discussed below, when an adhesive agent is used to bond the light-emitting elements to the light-transmitting member, leakage or falling off of adhesive from the side surfaces of the light-transmitting member can be prevented. An adhesive agent will absorb or scatter light from the light-emitting elements, so light from the light-emitting elements is efficiently reflected by the light-reflecting member (discussed below). Thus, preferably no adhesive material or other joining members will be provided anywhere else, but only on the joining surfaces.
    [0043] The term "surface area" refers to the flat surface area when the lower surface of the light-transmitting member and the upper surfaces of the light-emitting elements are flat surfaces, and when they are not flat surfaces, it means the area of surface within the outer edges of the upper surfaces of the light-emitting elements and the lower surface of the light-transmitting member.
    [0044] The ratio of the surface area of the lower surface of the light-transmitting member to the surface area of the upper surfaces of the light-emitting elements is preferably from about 10:8 to 10:10, more preferably about about 10:10. 10:9 to 10:10, and even more preferably from about 10:9 to 10:9.5.
    [0045] The surface area of the upper surface of the light-emitting member is preferably the same as the surface area of the upper surfaces of the light-emitting element. The term "the same" means that a difference of about ±10% is allowed.
    [0046] There is no particular restriction on the material of the light transmitting limb, as long as it contains phosphorus, but examples include resin, glass and inorganic substances. The material may also be cut from an ingot of phosphorus, such as single crystals or polycrystals of phosphorus, or a precipitate of phosphorus powder, or it may be a sintered mixture of phosphorus powder with a resin, a glass, a inorganic substance or something like that. The higher the transparency, the more readily light will be reflected at the interface with the light-reflecting member discussed below, and thus luminance can be increased.
    [0047] Examples of phosphors that emit white light when combined with a blue light-emitting element include YAG and BOS-based materials. When a phosphor such as this is contained in the light transmitting member, the concentration of phosphor is preferably about 5 to 50%, for example.
    [0048] The light transmitting member is joined so as to cover the light extracting face of the light emitting elements. Such bonding can be accomplished by compression bonding, sintering, bonding with a known adhesive such as epoxy or silicone, bonding with an organic adhesive that has a high refractive index, bonding with low-melting glass, etc.
    [0049] For example, in the case where the light transmitting member contains a phosphor that emits white light when combined with a blue light emitting element, containing a red phosphor in the adhesive agent that joins the blue light emitting element to the light transmitting member light, a light-emitting device can be obtained that emits the color of electric lamp in accordance with JIS standards.
    [0050] The protruding components of the light transmitting member can be formed into the aforementioned shape by properly selecting the blade width and blade tip angle of the cutting blade when the light transmitting member is cut into individual parts. They can also be formed by half-cutting according to the cutting method. light reflecting member
    [0051] As shown in Figures 1A and 1B, the light-emitting device may comprise a light-reflecting member 6 which contains the light-emitting elements 1 and/or the light-transmitting member 2. It is especially preferable in this case that the light-emitting member 6 light-reflecting member 6 contains the light-emitting elements 1 and the light-transmitting member 2. However, when the light-reflecting member 6 contains the light-transmitting member 2, it is preferable that the upper surface 2a of the light-transmitting member 2 is not covered by the light-reflecting member 6, so that the top surface 2a of the light-transmitting member 2 and the light-reflecting member 6 are flush with, or protrude from, the top surface of the light-reflecting member 6.
    [0052] In general, light emitted from the upper surface of the light-transmitting member serving as the emitting face also scatters outward in the lateral direction. In the case where the top surface of the light-reflecting member is projected from the top surface of the light-transmitting member (i.e., in the case where it is higher than the top surface of the light-transmitting member), the light emitted from the upper surface of the light transmitting member will be applied to the light reflecting member and will be reflected, resulting in variance in the light distribution. In this way, the emitted light can be extracted directly to the outside by covering the side surfaces of the light transmitting member with the light reflecting member, while lowering the height of the light reflecting member covering the outer periphery of these side surfaces.
    [0053] Furthermore, when the light transmitting member is separated, there may be a change in the distribution of the phosphor located between the light emitting elements and the emitting face, resulting in color irregularities. On the other hand, in the case where the light transmitting member is surrounded by a light reflecting member and the light transmitting member is held down by it, there will be no separation, displacement or the like of the light transmitting member and thus , there will be no risk of color irregularities and the like.
    [0054] The light-reflecting member is formed of a material with the ability to reflect the light emitted from the light-emitting elements. Accordingly, light emitted from the light-emitting elements is reflected within the light-emitting elements or the light-transmitting member at the boundary between the light-reflecting member and the light-emitting elements or the light-transmitting member. As a result, light propagates within the light-emitting elements or the light-transmitting member, and is finally emitted to the outside of the upper surface of the light-transmitting member.
    [0055] The light-reflecting member may be formed from a resin that includes at least one of a silicone resin, a modified silicone resin, an epoxy resin, a modified epoxy resin, an acrylic resin, or a hybrid resin that contains one or more of those resins, and a reflective substance. Examples of reflective substance include titanium oxide, silicon oxide, zirconium oxide, potassium titanate, alumina, aluminum nitride, boron nitride, mullite and the like.
    [0056] The light reflecting member can be made of a material that is not only reflective but also dissipates heat. Examples of such a material include boron nitride and aluminum nitride with high thermal conductivity. The thermal conductivity of the light-reflecting member is preferably at least 1 W/m^K, and more preferably at least 3 W/m^K. Thus, setting a high thermal conductivity allows the surface area of contact between the light transmitting member and the light reflecting member to be increased, along with the shape of the aforementioned protruding components on the side surfaces of the light transmitting member. . As a result, heat that accumulates in the light transmitting member will be readily transmitted to the light reflecting member, which improves the heat dissipation of the light transmitting member. Phosphorus contained in the light transmitting member can sometimes undergo self-heating due to Stokes loss, and this heat can decrease the light conversion efficiency. However, when the thermal conductivity of the light-reflecting member is adjusted upwards, as discussed above, heat from the phosphor in the light-transmitting member can be released efficiently.
    [0057] The amount of light reflected, the amount transmitted and others can be varied by varying the amount and/or thickness of the reflective substance, etc. In this way, the characteristics, etc., of the light-emitting device to be obtained can be adjusted as desired. For example, it is preferred that the amount in which the reflective substance is contained is at least 30% by weight, and that its thickness is at least 20 μm.
    [0058] The light reflecting member can be formed by injection molding, impregnation molding, resin printing method, transfer molding method or compression molding method.
    [0059] A Zener diode or other protective element can be mounted on the light emitting device of the present invention. The shielding element can be fitted to the light reflecting member 6 to prevent a decrease in light extraction when light from the light-emitting elements is absorbed by the shielding element or when light is blocked by the shielding element.Substrate
    [0060] As shown in Figures 1A and 1B, the light emitting elements 1 of the light emitting device are normally on a substrate 4. Examples of the substrate material include epoxy glass, resin, ceramic or other insulating member and a metal member on which an insulating member has been formed. It is especially favorable to use a ceramic with high weather resistance and heat resistance. Examples of ceramic materials include alumina, aluminum nitride and mullite. Such ceramic materials can be combined with BT resin, glass epoxy, with an epoxy resin or other such insulating material, for example.
    [0061] The substrate 4 normally has on its surface 5 an electrical wiring that is connected to the light-emitting elements 1. Such substrate is known in this field, and any substrate that is used for the assembly of the light-emitting elements and others can be used . Luminance Assessment
    [0062] Using the light emitting member 2 shown in Figures 2A and 2B, the light emitting device 10 shown in Figures 1A and 1B was produced and its luminance distribution was measured.
    [0063] In this light-emitting device 10, four light-emitting elements 1 (measuring 1.3 x 1.3 mm) were arranged in series on substrate 4. The substrate was produced by vapor deposition in a standard of titanium, palladium and gold, in that order, on the surface of an aluminum nitride material that has a thermal conductivity of about 170 W/m^K, and then with a gold coating over it. The light-emitting elements were flipchipped mounted with gold composite projections.
    [0064] The upper surfaces of the light emitting elements 1 were covered by a flat light transmitting member 2 (containing 5 to 10% by weight YAG phosphor and measuring 1.55 x 5.9 x 0.20 mm (thickness) ) which was formed by mixing and sintering YAG and alumina. This covering was made by heat curing an adhesive agent composed of a silicone resin.
    [0065] The length L of the protruding components 3 of the light transmitting member 2 was 0.125 mm, and the height H was 0.05 mm.
    [0066] The side surfaces of the heat-transmitting member 2 and the light-emitting elements 1 were surrounded by the light-reflecting member 6 by impregnation. The light reflecting member 6 consisted of a silicone resin with 30% by weight titanium oxide, and its thermal conductivity was about 1 W/m^K.
    [0067] The light-reflecting member 6 was substantially flush with the upper surface 2a of the light-transmitting member 2, and the thickness of the side surfaces of the light-emitting elements 1 and the light-transmitting member 2 was about 1.2 mm
    [0068] Also, for comparison purposes, the same light-emitting device was produced using the light-transmitting member 12 shown in Figures 4A and 4B, and the luminance distribution was measured.
    [0069] With this light transmitting member 12, the size and thickness of the top and bottom surfaces, as well as the material, are the same as those of the light transmitting member 2 discussed above, but the side surfaces thereof have an inclined surface. which is inclined by 45° on the upper surface side, and on the lower surface side has a vertical surface that projects a length L' (0.125 mm) beyond the upper surface and has a height H' (0.075 mm).
    [0070] A ProMetric PM-1423F-1 instrument was used to measure the luminance distribution, and a relative comparison was made. Luminance distribution was measured on the front surfaces of light-emitting devices produced using light-transmitting members 2 and 12, and cross-sectional data (Figures 3A and 3B) were produced from the luminance distribution on the front surfaces .
    [0071] As a result, as shown in Figures 3A and 3B, with the light-emitting device in this embodiment comprising the components protruding from the light-transmitting member, there was a considerable difference in luminance between the light-emitting part and the non-emitting part. , and a light-emitting device with good sharpness was provided.
    [0072] Light output from places other than the light-emitting part is also considered to be a cause of glare, since unwanted light shines in unwanted places when the light-emitting device is incorporated into a headlamp or the like. , for example. When the luminance on the front surface of a light-emitting device is taken into account, it is important that there is a clearly defined boundary between the light-emitting part and the non-emitting part (good sharpness). Industrial Applicability
    [0073] The light emitting device of the present invention can be used for various light sources, such as an illuminating light source, various indicator light sources, automotive light sources, display light sources, backlight light sources crystal, traffic signs, vehicle parts, billboard channel letters and the like.
    权利要求:
    Claims (5)
    [0001]
    1. A light-emitting device (10), comprising: a plurality of light-emitting elements (1) whose upper surface is a light-extracting face, a light-reflecting member (6) encompassing the light-emitting elements (1) ), and a single light transmitting member (2) which has an upper surface (2a) and a lower surface (2b), and covers the light-extracting face of the light-emitting element (1), the light transmitting member ( 2) contains phosphor, the top surface (2a) and the bottom surface (2b) of the light transmitting member (2) are flat and parallel to each other, a side surface of the light transmitting member (2) has a component protrusion (3) projecting to the side and making contact with the lower surface (2b), a plurality of light emitting elements (1) are covered as a whole by a light transmitting member (2) and by the reflecting member light (6), characterized by the fact that the light transmitting member (2) has the entire side surface covered with the light-reflecting member (6) and the upper surface (2a) of the light-transmitting member (2) is exposed from the light-reflecting member (6), and the protruding member (3) of the light-transmitting member (2) ) has a vertical surface (3a) that touches the lower surface (2b), and a surface (3b) that touches this vertical surface (3a) and is parallel to the upper surface (2a) of the light transmitting member (2), and it still has a second vertical surface (3c) that touches the upper surface (2a).
    [0002]
    2. Light emitting device (10) according to claim 1, characterized in that the upper surface (2a) of the light transmitting member (2) and the light reflecting member (6) are leveled or project out of the upper surface (2a) of the light transmitting member (2).
    [0003]
    3. Light-emitting device (10) according to claim 1 or 2, characterized in that an edge of the upper surface (2a) of the light-transmitting member (2) coincides with an outer edge of the light-emitting element (1) in plan view.
    [0004]
    4. Light emitting device (10), according to any one of claims 1 to 3, characterized in that the ratio between the surface area of the lower surface (2b) of the light transmitting member (2) and the area of surface of the upper surfaces of the light-emitting elements (1) is 10:8 to 10:10, and the surface area of the upper surface (2a) of the light-transmitting member (2) is 100±10% of the surface area of the upper surfaces of the light emitting element (1).
    [0005]
    5. Light emitting device (10), according to any one of claims 1 to 4, characterized in that the length L of the protrusion component (3) that projects to the side is from 10 to 300 μm, or the height H of the protruding member (3) from the lower surface (2b) of the light transmitting member (2) is 25% of the thickness of the light transmitting member (2).
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    法律状态:
    2018-11-13| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-03-31| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-03-16| B07A| Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]|
    2021-07-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|
    2021-11-16| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2022-01-11| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 26/03/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    JP2013-086357|2013-04-17|
    JP2013086357|2013-04-17|
    PCT/JP2014/058530|WO2014171277A1|2013-04-17|2014-03-26|Light emitting device|
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