WO2014014249A1 - 비대칭 자유곡면 수식을 적용한 엘이디 광확산렌즈 - Google Patents
비대칭 자유곡면 수식을 적용한 엘이디 광확산렌즈 Download PDFInfo
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- WO2014014249A1 WO2014014249A1 PCT/KR2013/006336 KR2013006336W WO2014014249A1 WO 2014014249 A1 WO2014014249 A1 WO 2014014249A1 KR 2013006336 W KR2013006336 W KR 2013006336W WO 2014014249 A1 WO2014014249 A1 WO 2014014249A1
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- light
- led
- lens
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- axis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
- F21K9/00—Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
- F21K9/60—Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/04—Refractors for light sources of lens shape
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V5/00—Refractors for light sources
- F21V5/08—Refractors for light sources producing an asymmetric light distribution
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0004—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed
- G02B19/0009—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only
- G02B19/0014—Condensers, e.g. light collectors or similar non-imaging optics characterised by the optical means employed having refractive surfaces only at least one surface having optical power
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B19/00—Condensers, e.g. light collectors or similar non-imaging optics
- G02B19/0033—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use
- G02B19/0047—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source
- G02B19/0061—Condensers, e.g. light collectors or similar non-imaging optics characterised by the use for use with a light source the light source comprising a LED
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/02—Simple or compound lenses with non-spherical faces
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
Definitions
- the present invention relates to an LED light diffusing lens for LED street light applying the asymmetric free curve formula, and more particularly, to increase the uniformity ratio of illumination by applying the asymmetric free curve formula, in particular, the surrounding conditions of the highway
- an LED light diffusion lens applying an asymmetric free-curve formula that can control an LED light source to exhibit all functions as an LED street light suitable for lane characteristics, and to apply an LED street light for a highway to the market.
- LED Light Emitting Diode
- the LED light source has a strong characteristic of the straightness of the light, and as shown in FIG. 1, the light energy emission form of the LED near the point light source generally forms a Gaussian distribution in which the light distribution is concentrated in the central portion of the light source. do. This results in glare and light pollution due to sparking because the center light is too strong compared to the surroundings.
- an optical lens has been developed to diffusely adjust the light distribution of the LED by being used in combination with the LED side.
- the radiation pattern of the light adjusted LED is shown in FIG.
- the Lambertian distribution is still present, indicating that the center light is stronger than the surroundings, and that it does not induce even brightness, and it is still insufficient to adjust the light diffusion of the LED light source.
- the glitter due to the central light concentration is still not able to remove the glare phenomenon, and the light control efficiency is greatly reduced, which proves that there is a considerable difficulty in controlling the divergent light of the LED such as light diffusion.
- LEDs are being widely used and marketed in various industries, such as indoor lighting, outdoor lighting, and backlight, due to various advantages, and the light distribution adjustment and stable optical characteristics are required for each application.
- the LED light diffusion optical lens developed and proposed conventionally induces only light diffusion with respect to the light emitted from the LED, and it can be used in either the X axis direction or the Y axis direction regardless of the characteristics of each application. As the light is adjusted to induce light diffusion only, the lighting efficiency and energy efficiency according to the specificity of each user is not maximized.
- LED lighting using LED as a light source has been variously applied to general street lamps, security lamps, tunnel lights, etc., but LED lighting for highways is not present.
- the present invention has been made in view of the above problems, and by applying an asymmetric free-curve equation, it is possible to increase the uniformity (even distribution of light in a certain space) according to the LED light control, especially in the vicinity of the highway
- the purpose is to provide LED light diffusion lens with asymmetrical free-curve formula that can control the light to show all functions and to provide the market with LED street light for highways. have.
- the present invention can provide a surface light source solution that is suitable for the characteristics of the highway while functioning as a diffuser capable of adjusting all directions of light emission by controlling all directions of light adjustment in the X and Y directions for the LED light source.
- a surface light source solution that is suitable for the characteristics of the highway while functioning as a diffuser capable of adjusting all directions of light emission by controlling all directions of light adjustment in the X and Y directions for the LED light source.
- the present invention has an aspherical surface on both the inside and the outside surface, so that the free curved surface can be utilized as much as possible, so that fine control by numerical control can be performed to increase the precision according to light control.
- fine control by numerical control can be performed to increase the precision according to light control.
- An object of the present invention is to provide an LED light diffusion lens to which an asymmetric free-curve formula is applied to improve the visibility of a highway, thereby eliminating driver fatigue and promoting safe driving.
- the entire body is made of a lens structure formed of a glass material or a polymer material;
- the lens structure is an aspherical surface forming the inner line of the body primarily to induce light uniformity of the LED light source, and form a curved surface in the form of a bent line in which the hills and valleys are formed, the center of the LED light source in the center It includes an icicle-type light adjusting protrusion disposed protruding toward the surface, and includes both an inner surface of the X-axis incidence and an inner surface of the Y-axis incidence.
- the entire body is made of a lens structure formed of a glass material or a polymer material;
- the lens structure is an aspherical surface forming the inner line of the body primarily to induce light uniformity of the LED light source, and form a curved surface in the form of a bent line in which the hills and valleys are formed, the center of the LED light source in the center It includes an icicle-type light adjusting protrusion disposed protruding toward the surface, and includes both an inner surface of the X-axis incidence and an inner surface of the Y-axis incidence.
- any one of the x, y, z variable may be formed such that the order coefficient of the odd order term satisfies zero.
- the uniformity ratio of illumination for a target area according to light control of an LED as a light source can be greatly increased, and in particular, an outer side, a city center, or a tonsil It is possible to provide LED streetlights for highways that have light control and lighting efficiency suitable for the surrounding conditions and lane characteristics of highways such as four lanes and two lanes, and can achieve usefulness for pioneering new markets.
- the present invention can be formed aspheric on both the entrance surface and the exit surface, but by utilizing the asymmetrical free surface to the maximum, it is possible to modify and change the surface more freely by adjusting the aspherical coefficient, and the numerical design and mathematical design by the free surface As a result, since fine control is possible through numerical control, it is possible to achieve the usefulness of increasing the precision according to the light control.
- the present invention can improve the visibility of the highway as well as improve the visibility of the highway by increasing the uniformity (even distribution of light in a certain space) for the target area of the highway irradiation surface when applied to LED streetlight for highway only It can achieve usefulness to eliminate and promote safe operation.
- the present invention can provide the surface light source solution suitable for the characteristics of the highway and can provide the advantage of not having to use the primary lens for the primary adjustment of the divergent light of the LED as a light source, through which the uniformity and lighting Efficiency and energy efficiency can be improved, and maintenance can also be achieved with ease of implementation.
- 1 is a view showing a general light energy emission form for the LED light source.
- Figure 2 is a view showing the radiation form of the LED light source is adjusted by the conventional light diffusing lens.
- Figure 3 is an external perspective view showing an LED light diffusion lens to which the asymmetric free-form surface formula according to an embodiment of the present invention.
- FIG. 4 is a cross-sectional view showing a state in which the X-X line of Figure 3 is cut in the LED light diffusing lens according to the present invention.
- FIG. 5 is a cross-sectional view showing a state taken along the line Y-Y of Figure 3 in the LED light diffusing lens according to the present invention.
- FIG. 6 is radiation pattern data showing a light distribution curve to which an LED light diffusing lens is applied according to an embodiment of the present invention
- FIG. 7 is a light distribution density data to which the LED light diffusing lens according to an embodiment of the present invention.
- FIG 8 is an external perspective view of the LED light diffusing lens to which the asymmetric free-form surface formula according to another embodiment of the present invention is applied.
- FIG. 9 is a cross-sectional view illustrating a state in which the X-X ray of FIG. 6 is cut in the LED light diffusing lens according to the present invention.
- FIG. 10 is a cross-sectional view showing a state taken along the line Y-Y of Figure 6 in the LED light diffusing lens according to the present invention.
- Figure 11 is a schematic illustration showing the installation state of the LED luminaire including the LED light diffusing lens to which the asymmetric free-form surface formula according to the present invention.
- Figure 12 is an exemplary view showing another embodiment showing an LED light diffusing lens to which the asymmetric free curve equation according to the present invention.
- FIG. 13 is simulation data and a diagram for explaining the free-form surface condition of the light exiting outer surface in the present invention.
- the LED light diffusing lens to which the asymmetric free curve equation is applied is configured to function as a diffuser of the LED light source to which the LED is used as the light source and to which the asymmetric free curve equation is applied.
- the entire body is made of a lens structure 100 formed of a glass material or a polymer (Polymer) material.
- the polymer material may include polycarbonate (PC), polymethyl methacrylate (PMMA), cyclo olefin copolymer (COC), and the like. Any one kind can be selected and used.
- PC polycarbonate
- PMMA polymethyl methacrylate
- COC cyclo olefin copolymer
- the lens structure 100 forms an inner line of the body and forms a light incident inner surface 110 of a curved surface formed to have an axisymmetric structure with respect to both the X-axis direction and the Y-axis direction, and forms an outer line of the body. And a curved light exiting outer surface 120 formed to be asymmetrical with respect to the direction and symmetrical with respect to the Y-axis direction.
- the LED which is a light source is disposed below the light incident inner surface 110.
- the light incident inner surface 110 and the light exiting outer surface 120 are composed of aspherical surfaces so as to make the best use of curved degrees of freedom by adjusting aspherical conic constants and aspheric coefficients, thereby radiating the emitted light of the LED as a light source. It is desirable to be able to arbitrarily adjust the path and the light distribution freely.
- the light incident inner surface 110 is formed to have a curved surface in the form of a bent line in which the hills and valleys are formed, but is configured to have an icicle-type light adjusting protrusion 111 disposed protruded toward the LED side as a light source at the center.
- X-axis incident inner surface 110x and Y-axis incident inner surface 110y It is formed to have a cross-sectional shape of ”.
- the light incident inner surface 110 is a portion at which the divergent light of the LED, which is the light source, begins to be incident, and functions to serve as a primary diffused light unit for the divergent light of the LED so that the light distribution can be adjusted. By simultaneously adjusting the reflection and the refraction, it adjusts the incident light emitted from the LED and refracts the incident light of the LED at the outside of the center so as to diffuse the light evenly to become a surface light source. It is.
- the light incident inner surface 110 is a part of controlling light so as to induce a uniform brightness as a whole with respect to the divergent light emitted from the LED which is a light source through the above-described action, and finely light for each field through numerical control It is designed to control and adjust the light distribution, and primarily to derive the overall light uniformity.
- Table 1 below shows aspherical data for the light incident inner surface 110 in the present invention.
- Table 1 shows that the light incident inner surface 110 having an aspherical surface having an axisymmetric structure has an aspherical curvature value, a conic constant, and an aspheric coefficient, which is aspheric. This indicates that the curvature value, the conic constant, and the aspherical surface coefficient can be adjusted, which means that the radiation path and the light distribution can be arbitrarily tuned freely with respect to the divergent light of the LED which is the light source, and to realize light uniformity.
- Equation 1 the rotationally symmetric high order aspherical surface about the optical axis may be represented by Equation 1 below.
- Equation 1 which is an aspherical equation, is composed of a formula including a conic constant and an aspherical coefficient, and is a value representing an aspherical shape.
- Application of the aspherical surface coefficient means that the degree of freedom due to the aspherical surface can be increased and the aspherical surface shape can be freely designed by adjusting the aspherical surface coefficient, and 1 for the emitted light of the LED which is the light source through the light incident inner surface 110. In other words, it indicates that light adjustment can be performed to match the overall light uniformity.
- the light exit outer surface 120 is to allow the light to be first diffused by the light incident inner surface 110 to re-diffuse the secondary light to control the light to widen the target area.
- the outer surface (120x) forms a convex curved surface with an asymmetric curved structure Formed in the cross-sectional shape of ", and the Y-axis exit surface 120y is" It is formed to have a cross-sectional shape of ”.
- the light exit outer surface 120 is a part that emits toward the target area by inducing diffusion to the target area by refraction for light that firstly induced light uniformity by the light incident inner surface 110. It covers a larger area of the target area of the plane, while also illuminating at even brightness.
- the light output outer surface 120 is formed as a nonlinear free curved surface having an asymmetrical structure with respect to the X axis direction and a symmetrical structure with respect to the Y axis direction, and when numerically expressed as to the shape of the free curved surface, As shown in Equation 2 below, a free-form surface equation (T) may be represented.
- any one of the x, y, z variable is configured so that the order coefficient of the odd order terms must satisfy 0 to have a function in the vertical direction of the lane.
- the light distribution correction efficiency and the light diffusion efficiency can be greatly increased by having a right function shape requiring symmetric light distribution.
- the light exit outer surface 120 satisfies the three-dimensional shape constraint in Equation 2 above, and may be represented by Equation 3 below with reference to the left simulation data in FIG. 13.
- the primary and tertiary side (odd order) order coefficient of the x variable is 0, the tertiary order coefficient of the y variable is 0.
- the light exit outer surface 120 shows that one of the x, y, z variables indicates that the order coefficient of the odd order term satisfies 0, which is the surface of the LED which is the surface light source that emits light on only one side.
- the street In the normal direction, the street should have the form of a function, and in the direction perpendicular to the lane, the street lamp is installed by combing the lane, and the lighting is installed at a certain distance from the center line. While it must have a functional form, it indicates that it is a condition that satisfies the right-hand form that requires symmetric light distribution in the lane direction.
- the LED light diffusing lens 100 according to the present invention having the structure of the above-described embodiment is designed to be suitable for LED streetlights for one-way four-lane highways, and has a wide range of domestic highways or continental installations in the Americas or Russia. It is to provide an LED streetlight suitable for the highway.
- FIG. 6 is radiation pattern data showing a light distribution curve in a state in which an LED light diffusing lens and a light source LED are assembled according to an embodiment of the present invention, as shown in the radiation pattern of FIG. It is shown that the light distribution has a radiation pattern of the double diffusion treatment by light control of the diffusion lens.
- the LED light diffusing lens according to the present invention performs light distribution for adjusting the light source at an angle of view of 20 to 40 degrees in the X axis direction with respect to the LED light source, and light distribution for light adjustment at an angle of view of 110 to 130 degrees in the Y axis direction. It is shown to perform.
- the present invention shows that the light is adjusted and controlled so as to have a double angle of view in the X-axis direction and the Y-axis direction according to the structure arrangement design of the light incident inner surface of the symmetrical structure and the light output outer surface of the asymmetrical structure. It is shown that it can function as a light diffusing lens for LED streetlights for highways that can be installed on wide 8-lane highways or continental areas.
- FIG. 7 is data showing light distribution density in a state in which an LED light diffusing lens and an LED as a light source are assembled according to an embodiment of the present invention, and is installed at a height of 12m and an array interval of 28m in consideration of the highway width of a one-way four lane If so, it is simulation data.
- FIG. 7 shows that each light adjustment and control is carried out in the X-axis direction and the Y-axis direction, and it has the shape of a surface light source and shows uniform brightness for the target area of the highway irradiation surface. It shows that a high level of homogeneity can be achieved.
- the portion indicated by the circle at the bottom left indicates that the light uniformity is formed also in the X-axis direction, which is the inside of the light incident inner surface 110 having the icicle-type light adjusting protrusion 111. It shows that uniform light control is performed by the shape, which is not found in the prior art.
- a convex curved surface is formed with respect to the X-axis exit outer surface 120x and has an asymmetric curved structure. It may be modified or modified to form a cross-sectional shape of ", and with respect to the Y-axis exit outer surface 120y" Modifications or variations may be made to have a cross-sectional shape of ”.
- the X-axis output outer surface 120y having the above-described embodiment and the symmetrical curved structure in which the concave grooves 121 are formed in the convex curved center are formed.
- the light diffusion is further extended to the divergent light of the light-controlled LED to maintain the light uniformity through the incident inner surface 110.
- FIG. 8 shows an external view of another embodiment having the modified curved surfaces of FIGS. 9 and 10.
- the LED light diffusing lens 100 according to the present invention having the structure of another embodiment is designed to be suitable for LED streetlights for one-way two-lane highways, and LED streetlights for highways suitable for places such as domestic highways or Japan or Europe. It would be to provide.
- the LED light diffusing lens 100 to which the asymmetric free curve equation according to the embodiments of the present invention is applied adjusts the aspherical conic constant and the aspheric coefficient with respect to the X-axis exit surface 120x of the light exit surface 120.
- the curved surface may be modified or deformed, and may be bent and radiated to form an inclination of 10 to 30 degrees with respect to the X-axis output light through the light diffusing lens 100, and sometimes in the example shown in FIG. 11.
- LED light fixtures combined with LEDs as light sources may be installed to form a slope of 0 to 30 degrees with respect to the vertical pole axis of the street light.
- the curved surface of the light diffusing lens 100 with respect to the X-axis exit surface 120x or the light diffusing lens 100 is inclined to the street lamp to cover a wider target area with uniform brightness. It will be able to, and can be made to be more useful and suitable for LED streetlight for highway only.
- the LED light-diffusion lens 100 to which the asymmetric free-curve equation with the embodiment of the present invention is applied is the light exit outer surface by the aspherical surface including the X-axis exit outer surface 120x and the Y-axis exit outer surface 120y ( By modifying and modifying the size and curved shape of the 120) it can provide usefulness, such as to adjust the interval of the arrangement of LED lighting fixtures when installed on the highway.
- FIG. 12 is an external view showing another embodiment of the LED light diffusing lens to which the asymmetric free curve formula according to the present invention is applied, and shows an example of the deformation of the overall size and curved shape of the LED light diffusing lens, It shows the type of work that can be applied according to the lane width.
- 110x X-axis incident inner surface
- 110y Y-axis incident inner surface
- the present invention it is possible to control the LED light source to perform all functions as an LED street light suitable for the surrounding conditions and lane characteristics of the highway while increasing the uniformity ratio of illumination by applying an asymmetric free-form surface equation.
- the present invention relates to an LED (light diffusing lens) applying an asymmetric free-curve equation with image availability.
Abstract
Description
Claims (3)
- 몸체 전체가 유리 재질 또는 폴리머 재질로 형성되는 렌즈구조체로 이루어지되;상기 렌즈구조체는 몸체의 내측라인을 형성하는 비구면으로 1차적으로 LED 광원의 광 균일도를 유도하기 위한 것이며, 산과 골이 형성되는 굴곡라인의 형태로 파여진 곡면을 이루되 중심부에 광원인 LED 측을 향하여 돌기 배치된 아이시클(icicle)형 광조정돌부를 포함하고, X축방향 입사내면과 Y축방향 입사내면 모두에 “”의 단면형상으로 형성시킨 광 입사내면과;
- 몸체 전체가 유리 재질 또는 폴리머 재질로 형성되는 렌즈구조체로 이루어지되;상기 렌즈구조체는 몸체의 내측라인을 형성하는 비구면으로 1차적으로 LED 광원의 광 균일도를 유도하기 위한 것이며, 산과 골이 형성되는 굴곡라인의 형태로 파여진 곡면을 이루되 중심부에 광원인 LED 측을 향하여 돌기 배치된 아이시클(icicle)형 광조정돌부를 포함하고, X축방향 입사내면과 Y축방향 입사내면 모두에 “”의 단면형상으로 형성시킨 광 입사내면과;
- 제 1항 또는 제 2항에 있어서,상기 광 출사외면은,아래의 수학식에 대한 비선형의 자유 곡면식으로 나타낼 때,x,y,z변수 중에서 어느 하나는 홀수차항의 오더 계수가 반드시 0을 만족하도록 형성되는 것을 특징으로 하는 비대칭 자유곡면 수식을 적용한 LED 광확산렌즈.(수학식)T = ax + by + cz + dx2 + ey2 + fz2 + gx3 + hy3 + iz3 + jx4 + ky4 + lz4 + α= 1여기서, α=0 이다.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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JP2015523004A JP6046252B2 (ja) | 2012-07-20 | 2013-07-16 | Led灯器具 |
US14/415,801 US9611986B2 (en) | 2012-07-20 | 2013-07-16 | LED light-diffusing lens adopting asymmetric free-form surface expression |
EP13820607.3A EP2876362A4 (en) | 2012-07-20 | 2013-07-16 | LIGHT DIFFUSION LIGHT EMITTING DIODE LENS ADOPTING ASYMMETRIC FREE FORM SURFACE EXPRESSION |
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KR1020120079105A KR101343563B1 (ko) | 2012-07-20 | 2012-07-20 | 비대칭 자유곡면 수식을 적용한 엘이디 광확산렌즈 |
KR10-2012-0079105 | 2012-07-20 |
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US (1) | US9611986B2 (ko) |
EP (1) | EP2876362A4 (ko) |
JP (1) | JP6046252B2 (ko) |
KR (1) | KR101343563B1 (ko) |
WO (1) | WO2014014249A1 (ko) |
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KR101580742B1 (ko) * | 2014-06-20 | 2015-12-28 | 엘지전자 주식회사 | 조명 장치의 렌즈 설계 방법 |
US10241309B2 (en) | 2015-04-14 | 2019-03-26 | Philips Lighting Holding B.V. | Forward throw asymmetric optic design |
KR101625353B1 (ko) | 2016-01-20 | 2016-06-15 | 에이펙스인텍 주식회사 | 비구면을 갖는 광 확산렌즈 |
KR101625352B1 (ko) | 2016-01-20 | 2016-06-10 | 에이펙스인텍 주식회사 | 비구면 광 확산렌즈 |
TWI610470B (zh) * | 2016-06-13 | 2018-01-01 | 隆達電子股份有限公司 | 發光二極體晶片級封裝結構、直下式背光模組及發光裝置的製造方法 |
KR102623546B1 (ko) | 2016-09-23 | 2024-01-10 | 삼성전자주식회사 | 조명용 렌즈, 조명용 렌즈 어레이 및 이를 포함하는 조명 장치 |
CN108343861B (zh) * | 2017-01-24 | 2020-07-10 | 清华大学 | 自由曲面照明系统 |
US11255513B2 (en) * | 2017-03-15 | 2022-02-22 | Northled Aps | Asymmetric illumination lens |
KR102041019B1 (ko) * | 2017-11-27 | 2019-11-05 | 한국광기술원 | 자유곡면 렌즈 |
CN108227298A (zh) * | 2017-12-28 | 2018-06-29 | 重庆秉为科技有限公司 | 基于液晶显示扩展光源的照明设计方法 |
JP7365625B2 (ja) * | 2018-10-10 | 2023-10-20 | パナソニックIpマネジメント株式会社 | 照明装置及び照明器具 |
CN112984415B (zh) * | 2021-02-25 | 2022-09-16 | 江苏大学 | 一种led灯偏光透镜结构及led仓库货架灯 |
KR102416246B1 (ko) * | 2022-02-18 | 2022-07-05 | 더웨이(주) | 식물생장 친화적 가로등 |
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- 2013-07-16 EP EP13820607.3A patent/EP2876362A4/en not_active Withdrawn
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Also Published As
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KR101343563B1 (ko) | 2013-12-19 |
JP6046252B2 (ja) | 2016-12-14 |
US20150192256A1 (en) | 2015-07-09 |
EP2876362A4 (en) | 2016-04-06 |
EP2876362A1 (en) | 2015-05-27 |
JP2015531885A (ja) | 2015-11-05 |
US9611986B2 (en) | 2017-04-04 |
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