[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

NL2012957B1 - A lighting unit and a method. - Google Patents

A lighting unit and a method. Download PDF

Info

Publication number
NL2012957B1
NL2012957B1 NL2012957A NL2012957A NL2012957B1 NL 2012957 B1 NL2012957 B1 NL 2012957B1 NL 2012957 A NL2012957 A NL 2012957A NL 2012957 A NL2012957 A NL 2012957A NL 2012957 B1 NL2012957 B1 NL 2012957B1
Authority
NL
Netherlands
Prior art keywords
light source
strip
elongated
elements
sheet
Prior art date
Application number
NL2012957A
Other languages
Dutch (nl)
Inventor
Marc Nik De Ketelaere Ward
Original Assignee
Etap Nv
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Etap Nv filed Critical Etap Nv
Priority to NL2012957A priority Critical patent/NL2012957B1/en
Application granted granted Critical
Publication of NL2012957B1 publication Critical patent/NL2012957B1/en

Links

Classifications

    • 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
    • F21V5/02—Refractors for light sources of prismatic shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
    • B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
    • B29C59/022—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing characterised by the disposition or the configuration, e.g. dimensions, of the embossments or the shaping tools therefor
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • 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
    • F21Y2103/00—Elongate light sources, e.g. fluorescent tubes
    • F21Y2103/10—Elongate light sources, e.g. fluorescent tubes comprising a linear array of point-like light-generating elements
    • 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]

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Planar Illumination Modules (AREA)

Abstract

The invention relates to a lighting unit including an optical refractive element for refracting light emerging from an elongated light source. The optical refractive element comprises a mainly elongated sheet of optical transparent material having a first side facing towards the light source and a second side facing away from the light source. The first sheet side is provided with a linear Fresnel contour that is mainly invariant in a length direction of the sheet for obtaining a desired light distribution in a direction transverse to the elongated light source. Further, the second sheet side is provided with deglaring elements extending in the length direction of the sheet. The optical refractive element can be manufactured using an extrusion process and a hot embossing process, preferably followed by a curving process.

Description

P104671NL00
Title: A lighting unit and a method
The invention relates to a lighting unit, including an optical refractive element for refracting light emerging from an elongated light source, the optical refractive element comprising a mainly elongated sheet of optical transparent material having a first side facing towards the light source and a second side facing away from the light source.
Optical refractive elements are generally known, e.g. for point light source as well as for elongated light sources. Such refractive elements, also called lenses, have been designed for obtaining a desired light distribution from light emerging from the light source or light sources. The lens is e.g. implemented as an individual lens, a multi pack lens, a freeform lens, a TIR lens or a Fresnel lens. The lens can be manufactured using injection molding techniques, and has the ability, in principle, to direct light in any desired direction.
Optical refractive elements can also be manufactured as extruded elements. In a first variant, an extrusion process is applied on two-dimensional lenses resulting in two-dimensional beam shaping of light. In a second variant includes flat or curved profiles wherein a repetitive pattern is realized using an embossing drum roll. The profile can be bended along its longitudinal axis. Then, a deglaring function is obtained, however, without the option to provide a desired light distribution.
It is an object of the present invention to provide a lighting unit according to the preamble having an improved optical performance. Thereto, according to the invention, the first sheet side is provided with a linear Fresnel contour that is mainly invariant in a length direction of the sheet for obtaining a desired light distribution in a direction transverse to the elongated light source, and wherein the second sheet side is provided with de glaring elements extending in the length direction of the sheet.
By splitting the functionality of the first, interior sheet side and the second, exterior sheet side, both sheet sides can be optimized for their individual function. According to an aspect of the invention, the interior sheet side is provided with a linear Fresnel contour for obtaining a desired light distribution in a direction transverse to the length direction of the lens. Further, according to another aspect of the invention, the exterior sheet side is provided with deglaring elements so that the occurrence of skimming light beam in the length direction of the sheet is counteracted. Then, a chance of glaring in the length direction of the sheet is reduced considerably. According to an aspect of the invention, modification of the light emerging from the light source in both the length direction and the transverse direction is performed by a single optical refractive element.
In an advantageous embodiment of the invention, the optical refractive element has been formed by an extrusion process, wherein the linear Fresnel contour and the deglaring elements have been formed using an inline hot embossing roll process. Optionally, the typically flat refractive element has been bended or curved, along its length direction, after the inline hot embossing roll process has ended. By forming the first and second sheet side using an extrusion process, followed by an inline hot embossing process, preferably an inline continuous hot embossing process, the optical refractive element can be manufactured in a very simple, cheap and robust process. Further, the occurrence of optical aberrations such as an injection molding point or a molding ejector sinkmark can be counteracted. Also, visual separation lines in the length direction of the sheet can be avoided, in contrast with typical injection molding process products.
Further, the invention relates to a method of manufacturing a lighting unit.
By way of example only, embodiments of the present invention will now be described with reference to the accompanying figures in which
Fig. 1 shows a schematic perspective view of a lighting unit including an optical refractive element according to the invention;
Fig. 2 shows a schematic cross sectional view of the lighting unit of Fig. 1, further including a housing and an elongated light source;
Fig. 3a shows a cross sectional view of the light distribution of the lighting unit of Fig. 2 in a first embodiment;
Fig. 3b shows a cross sectional view of the light distribution of the lighting unit of Fig. 2 in a second embodiment;
Fig. 3c shows a longitudinal sectional view of the light distribution of the lighting unit of Fig. 2;
Fig. 4 shows a cross sectional view of a deglaring element on a side of the optical refractive element facing away from the light source;
Fig. 5 shows a schematic perspective view of the optical refractive element shown in Fig. 1 during a hot embossing step of a manufacturing process, and
Fig. 6 shows a schematic perspective view of the optical refractive element shown in Fig. 1 during a curving step of a manufacturing process.
It is noted that the figures merely show preferred embodiments according to the invention. In the figures, the same reference numbers refer to equal or corresponding parts.
Figure 1 shows a schematic perspective view of a lighting unit 1 according to the invention. The lighting unit 1 includes an optical refractive element 2, also called lens, for refracting light emerging from an elongated light source 3. The optical refractive element 2 comprises a mainly elongated sheet 2 of optical transparent material having a first side 4 facing towards the light source 3 and a second side 5 facing away from the light source 3. The first, inner side 4 is provided with a linear Fresnel contour 6 that is mainly invariant in a length direction L of the sheet 2 for obtaining a desired light distribution in a direction transverse T to the elongated light source 3. The second, exterior sheet side 5 is provided with de glaring elements 7 extending in the length direction L of the sheet 2. The optical refractive element 2 is made of optically transparent material.
Figure 2 shows a schematic cross sectional view of the lighting unit 1 of Fig. 1, including a housing 10 and the elongated light source 3.
Figures 3a,b show a cross sectional view of the light distribution of the lighting unit 1 in a first and second embodiment, respectively. In the first embodiment, the linear Fresnel contour 6 is designed such that specific, preferably symmetric zones Al, A2 are intensively illuminated by light beams BI, B2 more than other zones, thereby providing a so-called batwing distribution. The specific zones are offset with respect to a centerline C extending downwardly from the light source 3, in the direction T transverse to the length direction L of the sheet 2. In the second embodiment, the linear Fresnel contour 6 is designed such that a central zone A3 traversed by the centerline C is intensively illuminated by a light beam B3, more than other zones, thus providing a so-called narrow beam distribution. It is noted that, alternatively, another light distribution in a direction transverse T to the elongated light source 3 can be provided by applying another design of the linear Fresnel contour 6 on the first, inner side 4 of the sheet 2.
Figure 3c shows a longitudinal sectional view of the light distribution of the lighting unit 1. Light beams B10-B18 having an angle greater than a predetermined shielding angle alpha with respect to the length direction L of the sheet 2 may pass substantially unhindered, while light beams B20-B23 having an angle smaller than the predetermined shielding angle alpha with respect to the length direction L of the sheet 2 are mainly blocked due to the deglaring elements 7 extending in the length direction L of the sheet 2. Then, a chance that glaring occurs, is reduced. As an example, the shielding angle alpha can be circa 30 degrees. However, smaller or larger shielding angles are also possible, e.g. circa 20 degrees or circa 40 degrees.
Figure 4 shows a cross sectional view of a deglaring element 30 on a side 5 of the optical refractive element 2 facing away from the light source 3. The deglaring element 30 has a base 31 directed towards the sheet 2, two side walls 32, 33 and two inclined end walls 34, 35 meeting each other at a symmetry body axis B extending from the base 31. The two inclined end walls 34, 35 are directed away from the sheet 2. The shown deglaring element 30 is a prism element extending transverse to the length direction L of the sheet 2. The geometry of the deglaring element 30 induces the optical deglaring effect described referring to Fig. 3c.
Preferably, the second, exterior side 5 of the optical refractive element 2 includes a multiple number of de glaring elements, more preferably in a repeated pattern. The second, exterior side 5 of the optical refractive element 2 may include a corrugating contour, see e.g. Fig. 1 described above. The second, exterior side 5 of the optical refractive element 2 may be formed as a Fresnel structure.
It is noted that the deglaring element 30 can also be implemented as a pyramid element or a sawtooth element. It is further noted, that the de glaring element can be oriented to be mainly invariant in a direction T transverse to the length direction L of the sheet 2 or mainly invariant in another direction, e.g. over an angle of approximately 45 degrees with said transverse direction T. Then, the de glaring elements 30 are in fact two-dimensional structures. Further, as an alternative, the second, exterior side 5 of the sheet 2 may include a number of deglaring elements that are not invariant in a direction along the exterior side 5 of the sheet 2. As an example, the exterior side 5 may include a number of three-dimensional de glaring elements 30 distributed over said exterior side 5.
Figure 5 shows a schematic perspective view of the optical refractive element 2 during a manufacturing process, in particular during a hot embossing step thereof. Here, a sheet 2 of optically transparent material has been extruded, e.g. a plastic material. Then, the linear Fresnel contour on the first side 4 of the sheet 2 and the deglaring elements on the second side 5 of the sheet 2 are provided on the sheet 2 by performing a hot embossing process, e.g. by applying rollers 40, 41 having corresponding exterior contours 42, 43. By guiding the sheet 2 between the rollers 40, 41 a linear pattern in the length direction L is realized on the first side 4 of the sheet 2, and a linear pattern in the transverse direction T is realized on the exterior side 5 of the sheet 2.
Figure 6 shows a schematic perspective view of the optical refractive element 2 during a bending step of the manufacturing process. Here, the sheet 2 is brought in a permanently curved geometry, such as a semi-circular cylinder 50 or cylinder having another cross sectional shape such as a partial polygone, that is mainly invariant with respect to the length direction L of the sheet 2, for at least partially surrounding the light source 3. The bending step can be performed in line with the extrusion process and the hot embossing process. However, also other geometries can be applied, e.g. a flat sheet 2. Further, the sheet can be continuous, made from a single piece. As an example, a sheet having a length of several meters can be made. Then, after performing the extrusion process and the hot embossing process, the sheet can be cut or sawn at specific lengths for obtaining sheets having desired dimensions.
The elongated light source 3 can be implemented as a single elongated lighting element or a multiple number of lighting elements, such as LEDs, arranged in an elongated profile, e.g. aligned with each other forming a single virtual lighting line in a linear direction. Alternatively, the lighting elements can be positioned at corrugated locations forming two or more virtual lighting lines. Preferably, the orientation of the elongated light source 3 and the length direction L of the sheet 2 mainly map to optimize the optical performance of the lighting unit 1.
The lighting unit 1 can be used as an industrial line luminaire, an office luminaire, outdoor luminaire, parking area luminaire, shop lighting, luminaire, tunnel lighting luminaire, vehicle luminaire, e.g. for bus, metro, train or airplane.
According to an aspect of the invention, a method is provided for manufacturing a lighting unit, including an optical refractive element for refracting light emerging from an elongated light source, the method comprising steps of providing an optical refractive element, applying an extrusion process for obtaining an optical refractive element comprising a mainly elongated sheet of optical transparent material having a first side facing towards the light source and a second side facing away from the light source, and applying an inline hot embossing process to the extruded optical refractive element such that the first sheet side is provided with a linear Fresnel contour that is mainly invariant in a length direction of the sheet for obtaining a desired light distribution in a direction transverse to the elongated light source, and such that the second sheet side is provided with deglaring elements extending in the length direction of the sheet.
Optionally, the method further includes a step of curving the sheet for at least partially surrounding the light source, after performing the inline hot embossing process
The invention is not restricted to the embodiment described therein. It will be understood that many variants are possible.
As an example, the elongated light source can be implemented as a single or a multiple number of blue LED’s. By applying an optical refractive element provided with phosphor particles, a resulting white light beam can be generated.
Further, the linear Fresnel contour on the first, interior sheet side can be designed to magnify the appearance of the elongated light source in the transversal direction T for dividing the luminance over a wide range of the total output direction, in order to reduce the luminance and glare of the lighting unit dramatically. Then, a low luminance design is obtained.
Optionally, when the lighting unit can be designed such that the housing and the optical refractive element having a waterproof sealing.
These and other embodiments will be apparent for the person skilled in the art and are considered to fall within the scope of the invention as defined in the following claims. For the purpose of clarity and a concise description features are described herein as part of the same or separate embodiments. However, it will be appreciated that the scope of the invention may include embodiments having combinations of all or some of the features described.

Claims (14)

1. Verhchtingseenheid, omvattende een optisch brekingselement voor het breken van hcht dat uittreedt uit een langwerpige hchtbron, waarbij het optisch brekingselement een in hoofdzaak langwerpige strook van optisch transparant materiaal heeft met een eerste zijde dat naar de hchtbron is gericht en een tweede zijde die van de hchtbron vandaan is gericht, waarbij de eerste strookzijde is voorzien van een lineaire Fresnel -contour die in hoofdzaak invariant is in een lengterichting van de strook voor het verkrijgen van een gewenste lichtverdeling in een richting dwars op de langwerpige lichtbron, en waarbij de tweede strookzijde is voorzien van elementen voor het verminderen van schittering die zich uitstrekken in de lengterichting van de strook.A releasing unit, comprising an optical refractive element for breaking a hatch that exits from an elongated hold source, the optical refractive element having a substantially elongated strip of optically transparent material with a first side facing the hold source and a second side that of the tack source is directed away, the first strip side being provided with a linear Fresnel contour that is substantially invariant in a longitudinal direction of the strip for obtaining a desired light distribution in a direction transverse to the elongated light source, and wherein the second strip side is provided with elements for reducing glare extending in the longitudinal direction of the strip. 2. Verhchtingseenheid volgens conclusie 1, waarbij de elementen voor het verminderen van schittering op de tweede strookzijde een verspringende contour hebben met een herhalend patroon.Relation unit according to claim 1, wherein the elements for reducing glare on the second strip side have a staggered contour with a repeating pattern. 3. Verhchtingseenheid volgens conclusie 1 of 2, waarbij de elementen voor het verminderen van schittering prisma elementen, piramide elementen en/of zaagtand elementen hebben.3. Relation unit according to claim 1 or 2, wherein the glare reduction elements have prism elements, pyramid elements and / or sawtooth elements. 4. Verhchtingseenheid volgens één der voorgaande conclusies, waarbij de elementen voor het verminderen van schittering in hoofdzaak invariant zijn in een richting dwars op de lengterichting van de strook.4. Relation unit according to one of the preceding claims, wherein the elements for reducing glare are substantially invariant in a direction transverse to the longitudinal direction of the strip. 5. Verhchtingseenheid volgens één der voorgaande conclusies, waarbij het optische brekingselement gevormd is door een extrusieproces, en waarbij de eerste en tweede strookzijde zijn gevormd door een uitgelijnd verwarmd reliëfvormend (hot embossing) proces.5. A relationship unit according to any one of the preceding claims, wherein the optical refractive element is formed by an extrusion process, and wherein the first and second strip side are formed by an aligned heated embossing (hot embossing) process. 6. Verlichtingseenheid volgens één der voorgaande conclusies, waarbij de strook gekromd is nadat het uitgelijnd verwarmd reliëfvormend proces gereed is, voor het ten minste gedeeltelijk omgeven van de lichtbron.The illumination unit according to any one of the preceding claims, wherein the strip is curved after the aligned heated relief-forming process is ready to at least partially surround the light source. 7. Verlichtingseenheid volgens één der voorgaande conclusies, waarbij de strook continu is.A lighting unit according to any one of the preceding claims, wherein the strip is continuous. 8. Verlichtingseenheid volgens één der voorgaande conclusies, omvattende een langwerpige lichtbron.A lighting unit according to any one of the preceding claims, comprising an elongated light source. 9. Verlichtingseenheid volgens conclusie 8, waarbij de oriëntatie van de langwerpige lichtbron en de strook in hoofdzaak samenvallen.The illumination unit according to claim 8, wherein the orientation of the elongated light source and the strip substantially coincide. 10. Verlichtingseenheid volgens conclusie 8 of 9, waarbij de langwerpige lichtbron een enkelvoudig langwerpig lichtelement omvat.The lighting unit according to claim 8 or 9, wherein the elongated light source comprises a single elongated light element. 11. Verlichtingseenheid volgens conclusie 8 of 9, waarbij de langwerpige lichtbron een meervoudig aantal lichtelementen omvat die in een lineaire richting zijn uitgelijnd.The illumination unit according to claim 8 or 9, wherein the elongated light source comprises a plurality of light elements that are aligned in a linear direction. 12. Verlichtingseenheid volgens conclusie 6, waarbij de binnenste strookzijde van de strook ontworpen is voor het vergroten van het schijnsel van de langwerpige lichtbron in de dwarsrichting.The illumination unit of claim 6, wherein the inner strip side of the strip is designed to increase the glare of the elongated light source in the transverse direction. 13. Werkwijze voor het vervaardigen van een lichtbron, omvattende een optisch brekingselement voor het breken van licht dat uittreedt uit een langwerpige lichtbron, waarbij de werkwijze de stappen omvat van: - het verschaffen van een optisch brekingselement; - het toepassen van een extrusieproces voor het verkrijgen van een optisch brekingselement omvattende een in hoofdzaak langwerpige strook van optisch transparant materiaal met een eerste zijde dat naar de lichtbron is gericht en een tweede zijde die van de lichtbron vandaan is gericht; - het toepassen van een uitgelijnd verwarmd reliëfvormend (hot embossing) proces op het geëxtrudeerde optische brekingselement zodanig dat de eerste strookzijde is voorzien van een lineaire Fresnel-contour die in hoofdzaak invariant is in een lengterichting van de strook voor het verkrijgen van een gewenste lichtverdeling in een richting dwars op de langwerpige lichtbron, en zodanig dat de tweede strookzijde is voorzien van elementen voor het verminderen van schittering die zich uitstrekken in de lengterichting van de strook.A method of manufacturing a light source comprising an optical refractive element for refracting light emerging from an elongated light source, the method comprising the steps of: - providing an optical refractive element; - applying an extrusion process to obtain an optical refractive element comprising a substantially elongated strip of optically transparent material with a first side facing the light source and a second side facing away from the light source; - applying an aligned heated embossing (hot embossing) process to the extruded refractive optical element such that the first strip side is provided with a linear Fresnel contour that is substantially invariant in a longitudinal direction of the strip for obtaining a desired light distribution in a direction transverse to the elongated light source, and such that the second strip side is provided with elements for reducing glare extending in the longitudinal direction of the strip. 14. Werkwijze volgens conclusie 13, voorts omvattende een stap van het krommen van de strook voor het ten minste gedeeltelijk omgeven van de lichtbron, na het uitvoeren van het uitgelijnde verwarmde reliëfvormend proces.The method of claim 13, further comprising a step of curving the strip to at least partially surround the light source after performing the aligned heated embossing process.
NL2012957A 2014-06-05 2014-06-05 A lighting unit and a method. NL2012957B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
NL2012957A NL2012957B1 (en) 2014-06-05 2014-06-05 A lighting unit and a method.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL2012957A NL2012957B1 (en) 2014-06-05 2014-06-05 A lighting unit and a method.

Publications (1)

Publication Number Publication Date
NL2012957B1 true NL2012957B1 (en) 2016-06-22

Family

ID=51660534

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2012957A NL2012957B1 (en) 2014-06-05 2014-06-05 A lighting unit and a method.

Country Status (1)

Country Link
NL (1) NL2012957B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2023024B1 (en) * 2019-04-29 2020-11-05 Veko Lightsystems Int B V Thin-walled optical element lens for a light source provided with prismatic structures on both sides.

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1941079A (en) * 1931-09-05 1933-12-26 Holophane Co Inc Lighting apparatus employing rectilinear light sources
US2474317A (en) * 1949-06-28 Light refracting and transmitting
US3483366A (en) * 1966-11-01 1969-12-09 Holophane Co Inc Luminaire lens
DE10231531A1 (en) * 2002-07-12 2004-01-29 Herbert Waldmann Gmbh & Co. Tubular light for use in wet environments or underwater has cylindrical housing with ribs which are parallel to its axis and are arranged to form Fresnel pattern, so that light is emitted over predetermined angle
DE102007038739A1 (en) * 2006-08-22 2008-04-24 Citizen Electronics Co., Ltd., Fujiyoshida Light guide plate, method for producing a light guide plate and backlight unit with the light guide plate
JP2011056667A (en) * 2009-09-04 2011-03-24 Fukuvi Chemical Industry Co Ltd Method of manufacturing plastic lighting cover

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2474317A (en) * 1949-06-28 Light refracting and transmitting
US1941079A (en) * 1931-09-05 1933-12-26 Holophane Co Inc Lighting apparatus employing rectilinear light sources
US3483366A (en) * 1966-11-01 1969-12-09 Holophane Co Inc Luminaire lens
DE10231531A1 (en) * 2002-07-12 2004-01-29 Herbert Waldmann Gmbh & Co. Tubular light for use in wet environments or underwater has cylindrical housing with ribs which are parallel to its axis and are arranged to form Fresnel pattern, so that light is emitted over predetermined angle
DE102007038739A1 (en) * 2006-08-22 2008-04-24 Citizen Electronics Co., Ltd., Fujiyoshida Light guide plate, method for producing a light guide plate and backlight unit with the light guide plate
JP2011056667A (en) * 2009-09-04 2011-03-24 Fukuvi Chemical Industry Co Ltd Method of manufacturing plastic lighting cover

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2023024B1 (en) * 2019-04-29 2020-11-05 Veko Lightsystems Int B V Thin-walled optical element lens for a light source provided with prismatic structures on both sides.

Similar Documents

Publication Publication Date Title
CN104864338B (en) Lighting device for vehicle
DE102007035528B4 (en) lamp
EP2587120B1 (en) Light guide and automotive vehicle equipped with such a light guide
DE102011054232B4 (en) lighting device
DE202016002197U1 (en) Direct-emitting LED lamp with anti-glare effect
US9574731B2 (en) Light guide for an automobile lighting and/or signaling device
US20160320025A1 (en) Optical element, and assembly for emitting light
EP3012521B1 (en) Light for a motor vehicle
CN101949494A (en) Light-emitting assembly
JP2017518615A (en) Lighting device
JP7083830B2 (en) Light emitting module with light guide plate for automobile headlights
ITTO960988A1 (en) LIGHTING DEVICE SUITABLE TO GENERATE A RECTANGULAR PATTERN IN THE WORKING AREA, FOR EXAMPLE FOR THE LIGHTING OF STRIPS
DE202016008100U1 (en) lighting device
DE102011051978A1 (en) Taillight for e.g. bicycle, has lens that is provided on luminous surface of light guide with respect to LED, and LED that is arranged in plane with respect to reflective surface of light guide
EP3524873A1 (en) Efficient projection light module comprising microprojectors for a motor vehicle headlamp
EP3523573A1 (en) Light deflection device, lighting device and use
NL2012957B1 (en) A lighting unit and a method.
EP3626425B1 (en) Lamp component for forming a lamp having a large emission angle, lamp and method for manufacturing such a lamp component
US20100329606A1 (en) Lateral guide optical fiber
CN113924442A (en) Pre-collimator for a lighting device
EP2926047B1 (en) Lighting unit, especially for road illumination
TWI491837B (en) Light guide plate for illumination and illuminating lamp
EP2543540A1 (en) Optical fibre, illuminant and motor vehicle light
EP4086506B1 (en) Lighting device for a motor vehicle and manufacturing method
NL2019706B1 (en) A lighting unit

Legal Events

Date Code Title Description
HC Change of name(s) of proprietor(s)

Owner name: ETAP LIGHTING INTERNATIONAL NV; BE

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), CHANGE OF OWNER(S) NAME; FORMER OWNER NAME: ETAP N.V.

Effective date: 20220825