Connect public, paid and private patent data with Google Patents Public Datasets

Electroluminescent filament

Download PDF

Info

Publication number
US3819973A
US3819973A US30310172A US3819973A US 3819973 A US3819973 A US 3819973A US 30310172 A US30310172 A US 30310172A US 3819973 A US3819973 A US 3819973A
Authority
US
Grant status
Grant
Patent type
Prior art keywords
filament
wires
wire
electroluminescent
mils
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
Inventor
A Hosford
Original Assignee
A Hosford
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
Grant date

Links

Images

Classifications

    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources
    • H05B33/12Light sources with substantially two-dimensional radiating surfaces
    • H05B33/26Light sources with substantially two-dimensional radiating surfaces characterised by the composition or arrangement of the conductive material used as an electrode
    • HELECTRICITY
    • H05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
    • H05B33/00Electroluminescent light sources

Abstract

An electroluminescent filament of at least two wires made of electrical conductors each having an electrically insulating covering over the surface is provided. The wires are placed in abutment and covered with a phosphorescent material and the total thickness of the filament is controlled. Helically wound wires are used wherein the distance between the helical loop centers is controlled for best performance.

Description

United States Patent 1191 Hosford June 25, 1974 5 ELECTROLUMINESCENT FILAMENT 3.069579 12/1962 Berg et al. 3 l3/l08 A [76] Inve to onzo L o o 30 S 3,571,647 3/l97l Robinson 3l3/l08 A Brentwood Dr., Moorestown, NJ. 1 08057 Primary Exammer-James W. Lawrence Assistant ExaminerWm. H. Punter [22] Filed: Nov. 2, 1972 Attorney, Agent, or Firm-Thomas A. Lennox, Esq. [21] Appl. No.: 303,101

[57] ABSTRACT 521 US. Cl. ..313/498, 313/345- electroluminescent filament of at least two Wires [51] Int. Cl. .lj.'.;.'....l.ii65323 made of electrical conductors each having electri- [58] n w of Search 313/108 A, 108 R, 92 p cally insulating covering over the surface is provided. 313/108 B, 344445; 250/225 The wires are placed in abutment and covered with a phosphorescent material and the total thickness of the [56] References Cited filament is controlled. Helically wound wires are used UNITED STATES PATENTS wherein the distance between the helical loop centers 2 684 450 7/1954 Mager at al 313/108 A is controlled for best performance. 1052:1212 9/1962 Dow 313/108 A 12 Claims, 3 Drawing Figures ELECTROLUMINESCENT FILAMENT BACKGROUND OF INVENTION Many electroluminescent devices have been proposed, but few, if any, have proved a sufficiently effective light source for mass commercial marketing. Deficiencies include low efficiency of light output, short life, inability to color the light effectively and pennanently, low capacity, inapplicable to low cost continuous production, and others.

Electroluminescent phosphors exhibit luminescence in the presence of electric fields. While it is known that higher voltage and/or higher frequency of alternating current yields higher brightness, these inputs seriously reduce the life of the electroluminescent device. In common practice, the electric fields are generated by alternating current which may be either a direct field or a fringing field. Therefore, it is most desirable to construct a filament which could be used alone or combined with other filaments to make strands which would provide efficient light output and long life at moderate voltage and frequencies, such as ordinary house current.

The present invention relates to an electroluminescent filament that uses a fringing electric field surrounding at least two electrical conductors separated by an electrical insulator. A phosphor is applied to the outer surface of the wires and caused to luminesce by an electrical current applied across the conductors.

Prior art devices have been described of this general type such as in U.S. Pat. No. 2,684,450 to E. L. Mager, et al., July 20, 1954, wherein conductors were wrapped around an insulator, covered with phosphor. Also, in U.S. Pat. No. 3,052,812 to F. w. Dow, Sept. 4, 1962, wherein two wires were wound in various configurations to form relatively large diameter strands, generally with only one wire insulated. Also, in U.S. Pat. No. 3,571,647 to Bessie A. Robinson, Mar. 23, 1971, insulated wires were twisted together without details. Attempts to construct these devices either provided filaments that fail almost immediately or yield an almost imperceptible glow under conditions that yield a reasonable life.

A particular difficulty arises from the use of commercially available wire, such as magnet wire, in that the surface of the smaller gauge wire has relatively large raised imperfections, which, when coated with a dielectric, provide points of weakness in the insulation and limit the life or performance of an electroluminescent device constructed from them. These hot spots on the surface make all prior electroluminescent devices using insulation on only one wire, essentially useless.

SUMMARY OF INVENTION More particularly, this invention relates to electroluminescent devices offering high brightness and efficiency at the voltage and alternating cycle chosen, a more efficient capacitance than prior devices, and extremely long service life. Further, this invention relates to electroluminescent devices which provide versatility and efficiency in allowing the inclusion of permanent color bodies into the phosphor. Further, the electroluminescent devices are extremely ductle and durable as compared to prior devices.

It is an object of my invention to provide an electroluminescent filament that has increased brightness at relatively low voltage and frequency and that can be commercially reliable without failing due to arcing between the conductors. It is a further object that the filament be able to be produced by continuous methods with reliability suitable for consumer use. It is the object that the filament be able to be formed, twisted or wound to fonn designs, such as signs, crafts and arts, digital readouts, and indicators of an ornate or decorative nature. It is also intended that the filaments be grouped to provide a higher light output for illumination of the object on which the filaments are attached, such as interior emergency lighting on fixtures, baseboards and the like.

Therefore, my invention is an electroluminescent filament of at least two wires with each wire being an electrical conductor covered with an electrical insulator on its surface. The wires are placed in an abutting relation along their length and a phosphor coating applied to both wires. The total thickness of the filament is less than 10 mils.

It should be realized that by using the term abutting it is intended to indicate that the insulation of the wires touch. However, in an embodiment of the invention, where wire is helically wound around other wire, the looping wire touches the relatively straight wire, but the adjacent loops of the helical coil are preferably spaced a certain distance apart. When the embodiment of the invention employs two or more relatively parallel wires, their insulation touches for greatest efficiency.

DESCRIPTION OF PREFERRED EMBODIMENTS For the purpose of illustrating the invention, drawings and specific descriptions are provided, although it should be understood that the invention is not limited to these specific embodiments.

FIG. 1 illustrates an embodiment of the present invention.

FIG. 2 is a perspective view of a second embodiment of the invention.

FIG. 3 is a transverse sectional view of the embodiment of FIG. 2.

I have found that the total thickness of the filament is critical to performance. The thickness is required to be less than 10 mils, and best performance is obtained if the total thickness is 8 mils or less. There is no minimum thickness until there is insufficient conductive material in the wire to carry the current required to excite the phosphor. The present state of the art limits the total thickness of the filament since copper wire presently produced less than about 2 mils in thickness is generally insufficient to efficiently carry the current and provide long life to the filament. Therefore, the use of copper presently limits the thickness of the filament to greater than about 4 mils depending upon the configuration of the filament. Of course, other more conductive material will allow thinner filaments.

As stated above, the wires are placed in an abutting relationship. When two or more wires are placed in parallel, it is necessary that they touch. However, as stated above, when wires are helically wound around relatively straight wire, it is preferred that the helically wound loops not touch. In fact, I have discovered that a specific pitch between the loops provides particularly efficient illumination. This pitch is dependent somewhat upon the total thickness of the filament, but is within the range of about 5 to 12 mils. The pitch is preferably controlled in the range of 6 to l0 mils. Most preferred filaments are obtained by controlling the pitch to the range of 7 to 9 mils. This pitch distance is measured between loops of the same wire or between loops of different wires in multi-loop constructions.

This invention is not limited to the number of wires in the construction and may include any number of essentially parallel wires and any number of helically wound wires wound around parallel, twisted or helical wires. The wires may be of differing colors and may be connected in pairs or groups to achieve various effects.

Considering the drawings in detail, there is shown in FIG. I, an electroluminescent filament designated 10. In this embodiment wire 11 consisting of copper conductor l2 and polymeric electrical insulator 13 and wire 15 consisting of copper conductor 16 and polymeric electrical insulator 17 are laid in abutment in a roughly parallel configuration. The wires may be twisted, intertwined or even entangled together depending on the effect desired as long as they are in abutment. A phosphor 20 is located primarily in the crevices between wires 11 and 15 but also to a lesser degree over the entire surface of the wires. A light transparent or at least highly translucent polymeric coating 21 covers and protects the entire filament from damage due to hard use.

A preferred embodiment is depicted in FIGS. 2 and 3 of an electroluminescent filament designated 10. It includes wire 11' helically wound around wire The wire 11 is shown the same size as wire 15' but this is not necessary even within this preferred embodiment. It should be understood that the wires can be of the same size or the straight wire can be larger or smaller than the helical wire if manufacturing procedures permit. Wire 11 consists of a copper conductor 12 covered with an insulator 13'. The insulator I3 is a dielectric material such as enamel or Paralyne C and N as disclosed below. The wall of the insulator 13' should be as thin as possible in accordance with the principles set forth below. Although the conductor 16 is illustrated as having a round cross section, the conductor and indeed the entire wire 15' can be square, rectangular or any shape in cross section as desired. The wire 15' includes a conductor 16' and an insulator 17'. The conductor 16 is preferably smaller in cross-sectional dimension than the conductor 12 so that it can be more readily would about it. However, this is not a necessary requirement. Otherwise, the conductor 16' is the same as the conductor 12. The insulator 17' is the same as the insulator 13', but may, of course, be of different thickness.

In FIG. 2, the coils of the wire 11' are shown spaced apart. This distance apart 25 between the coils as measured from wire center to wire center is referred to herein as the pitch." As stated above it is preferred that this distance be in the range of'6 to 12 mils.

The wires 11 and 15' are covered with a powdered phosphor material 20' mixed with an appropriate polymeric binder such as thermoplastic resins, epoxy resin, and the like, to make the phosphor adhere to the insulating coating on the wires 11 and 15. The phosphor coating is placed over and mostly between the wires to the extent possible. The phosphor may, for example, include any one of the following or a mixture thereof:

1. Sylvania Type 523 phosphor consisting of zinc sulfide and manganese which generates a yellow color at 60, 400 and 6,000 Hz with a peak wavelength of 580 nm and has Fisher sub-sieve sizer number of 19.4.

2. Sylvania Type 723 phosphor consisting of zinc sulfide and copper which generates a green color at 60 Hz, bluegreen at 400 Hz, and blue at 6,000 Hz with a peak wavelength of 497 nm and has Fisher sub-sieve sizer number of 20.0.

3. Sylvania Type 814 phosphor consisting of zinc sulfide and copper which generates a blue color at 60, 400 and 6,000 Hz with a peak wavelength of 452 nm and has a Fisher sub-sieve sizer number of 24.0.

Each of the above phosphors is available from the Sylvania Division of General Telephone and Electronics. Of course, other phosphors available on the market can be substituted for those disclosed above. If desired, fluorescent materials can be added to the phosphor to give it color in its unexcited states; that is, in ambient light. Such fluorescent materials may include fluores- 7 cent paints available on the market. One such fluorescent paint in varying colors is available from the Illinois Bronze Powder and Paint Co., Lake Zurich, Ill. and sold under the trademark DAZ-L.

If desired, wires 11' and 15 together with the phosphor material 20 may be enclosed within a coating of light transparent material such as a flexible polymeric. The coating permits the light to be emitted by the filament 10' while at the same time protecting the phosphor coating. The transparent coating may contain color bodies in the form of dye or translucent particles.

In accordance with known principles of electroluminescence, filaments 10 and 10' are energized by connecting a voltage source to the conductors. Such voltage source may, for example, be an alternating current at 60 Hz and the voltage at or 220 volts. A fringe electric field is developed that excites the phosphors to luminesce.

An example of a filament 10' which produces an enhanced luminescence consists of the following:

Wire 15' includes a No. 44, 2 mil, copper wire having an 0.05 mil enamel insulating coating. The wire 11' is also a No. 44 copper conductor with an 0.05 mil insulator coating. The wire 11 is would on the wire 15 at the density of turns per inch for a pitch of 8 mils to yield an overall diameter of the filament of 6 mils as desired. Measurements indicate that such a wire yields more than 0.4 foot lambert when excited with a 110 volt alternatingcurrent at 60 Hz..There is a substantial increase in brightness at 220 volts and 60 Hz since the brightness in foot lamberts is proportional to the square of the voltage. Experiments with known electroluminescent filaments produce substantially lower brightness levels.

In the example described above, the insulatordielectric for the wires 1 l and 15' is enamel. If desired, the insulator could be Parylene C and N coated on the conductors in accordance with the process available from Union Carbide Corporation. The advantage of using Parylene C and N is that it reduces the size of the insulator-dietectric on the wires. The reduction in the total thickness of the insulator-dietectric using the same size core conductors 12' and 16, enhances the fringe field and hence the excitation of the phosphors.

Similarly, the filament 10 may be constructed using No. 40, 3 mil, copper wire with 0.1 mil coating as wire 15 while retaining No. 44 insulated copper wire with an 8 mil pitch as the winding. The overall thickness of the filament is about 7 A mils and yields almost the same light output under the same excitation as the device above.

In a third construction of the filament the core wire is No. 37 (4 is mil) copper wire with an 0.15 mil insulation, wrapped again with insulated No. 44 wire on an 8 mil pitch to produce a filament about 9 mils thick. The illumination obtained is somewhat poorer than obtained with the first construction.-

Similar constructions to filament 10' yield the following results:

Measurements of capacitance on filament 10' yield a C-Factor of about 86 phase angle as compared to a perfect capacitor which would yield 90. This high efficiency is favorable as compared to prior filament devices.

The prior examples are merely illustrative of my invention and are not intended to limit the scope of the patent grant. My invention is limited only by the appended claims.

1 claim:

1. An electroluminescent filament comprising:

at least two wires,

each wire comprising an electrical conductor and an electrically insulating covering on the surface of the conductor,

the wires being in abutting relation along their length,

a phosphor coating overlying the wires, and

the total thickness of the filament including the insulators covering the conductors being less than 10 mils.

2. An electroluminescent filament in accordance with claim 1 wherein the total thickness of the filament is less than about 8 mils.

3. An electroluminescent filament in accordance with claim 1 wherein the total thickness of the filament including the phosphor coating, which is essentially all between the wires except where the wires are in abutment, is less than 10 mils.

4. An electroluminescent filament in accordance with claim 3 wherein the total thickness is less than 8 mils.

5. An electroluminescent filament as set forth in claim 1 wherein at least two wires are in parallel abutting relation.

6. An electroluminescent filament in accordance with claim 1 wherein the wires are interwound each upon the other.

7. An electroluminescent filament in accordance with claim 1 wherein at least one of the wires is helically wound around at least one of the other wires so that the wires are in abutting relation along their length.

8. An electroluminescent filament in accordance with claim 7 wherein the distance between centers of each loop of helically wound wire and the next adjacent loop of helically wound wire is in the range of about 6 mils to about 12 mils.

9. An electroluminescent filament in accordance with claim 8 wherein the total thickness of filament is less than about 8 mils and the distance between centers of each loop is about 7 to about 9 mils.

10. An electroluminescent filament in accordance with claim 1 including a light transparent coating overlying the wires and the phosphor.

11. An electroluminescent filament comprising:

at least two wires, each wire comprising an electrical conductor and an electrically insulating coating on the surface,

at least one of the wires being helically wound around one of the other wires so that the wires are in abutting relation along their length,

a phosphor coatingoverlying the wires,

the total thickness of the filament including the insulators covering the conductors and the phosphor coating being less than 10 mils, and

the distance between centers of each loop of helically wound wire and the next adjacent loop of helically wound wire being in the range of about 6 mils to about 12 mils.

12. An electroluminescent filament in accordance with claim 11 wherein the total thickness of the filament is in the range of about six to about nine mils and the distance between helically loops is about 7 to 9 mils.

Claims (12)

1. An electroluminescent filament comprising: at least two wires, each wire comprising an electrical conductor and an electrically insulating covering on the surface of the conductor, the wires being in abutting relation along their length, a phosphor coating overlying the wires, and the total thickness of the filament including the insulators covering the conductors being less than 10 mils.
2. An electroluminescent filament in accordance with claim 1 wherein the total thickness of the filament is less than about 8 mils.
3. An electroluminescent filament in accordance with claim 1 wherein the total thickness of the filament including the phosphor coating, which is essentially all between the wires except where the wires are in abutment, is less than 10 mils.
4. An electroluminescent filament in accordance with claim 3 wherein the total thickness is less than 8 mils.
5. An electroluminescent filament as set forth in claim 1 wherein at least two wires are in parallel abutting relation.
6. An electroluminescent filament in accordance with claim 1 wherein the wires are interwound each upon the other.
7. An electroluminescent filament in accordance with claim 1 wherein at least one of the wires is helically wound around at least one of the other wires so that the wires are in abutting relation along their length.
8. An electroluminescent filament in accordance with claim 7 wherein the distance between centers of each loop of helically wound wire and the next adjacent loop of helically wound wire is in the range of about 6 mils to about 12 mils.
9. An electroluminescent filament in accordance with claim 8 wherein the total thickness of filament is less than about 8 mils and the distance between centers of each loop is about 7 to about 9 mils.
10. An electroluminescent filament in accordance with claim 1 including a light transparent coating overlying the wires and the phosphor.
11. An electroluminescent filament comprising: at least two wires, each wire comprising an electrical conductor and an electrically insulating coating on the surface, at least one of the wires being helically wound around one of the other wires so that the wires are in abutting relation along their length, a phosphor coating overlying the wires, the total thickness of the filament including the insulators covering the conductors and the phosphor coating being less than 10 mils, and the distance between centers of each loop of helically wound wire and the next adjacent loop of helically wound wire being in the range of about 6 mils to about 12 mils.
12. An electroluminescent filament in accordance with claim 11 wherein the total thickness of the filament is in the range of about six to about nine mils and the distance between helically loops is about 7 to 9 mils.
US3819973A 1972-11-02 1972-11-02 Electroluminescent filament Expired - Lifetime US3819973A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US3819973A US3819973A (en) 1972-11-02 1972-11-02 Electroluminescent filament

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US3819973A US3819973A (en) 1972-11-02 1972-11-02 Electroluminescent filament

Publications (1)

Publication Number Publication Date
US3819973A true US3819973A (en) 1974-06-25

Family

ID=23170542

Family Applications (1)

Application Number Title Priority Date Filing Date
US3819973A Expired - Lifetime US3819973A (en) 1972-11-02 1972-11-02 Electroluminescent filament

Country Status (1)

Country Link
US (1) US3819973A (en)

Cited By (63)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699362A1 (en) * 1992-12-10 1994-06-17 Jerusalem College Tech Electroluminescent light sources.
WO1997024015A1 (en) * 1995-12-22 1997-07-03 Add-Vision, Inc. Electroluminescent filament
EP0838975A1 (en) * 1996-10-22 1998-04-29 Elam-Electroluminescent Industries Ltd. Electroluminescent light source
WO1998038624A1 (en) * 1997-02-28 1998-09-03 Miniflame Limited Sign apparatus
US5917288A (en) * 1997-06-11 1999-06-29 Feldman; Harold Sound responsive electroluminescent visual display
US5945632A (en) * 1997-08-15 1999-08-31 Dimarzio Inc. Ribbon overbraid cable
US5951140A (en) * 1997-06-11 1999-09-14 Live Wire Enterprises, Inc. Display with flexible electroluminescent connector
US5962967A (en) * 1998-03-19 1999-10-05 Kiryuschev; Irina Electroluminescent device and method of manufacturing same
GB2338332A (en) * 1997-02-28 1999-12-15 Miniflame Ltd Sign apparatus
WO2000013750A1 (en) * 1998-09-02 2000-03-16 Kennet Jonson Guide light system
US6054809A (en) * 1996-08-14 2000-04-25 Add-Vision, Inc. Electroluminescent lamp designs
US6074071A (en) * 1999-06-29 2000-06-13 Elam Electroluminescent Industries Ltd. Aquarium lighting system
NL1013742C2 (en) * 1999-12-03 2001-06-06 Mark Kok System for by means of electroluminescence generating light.
WO2002098177A1 (en) * 2001-05-31 2002-12-05 Agfa Gevaert N.V. System for generating light by means of electroluminescence
US6608438B2 (en) * 2001-11-09 2003-08-19 Visson Ip Llc 3-D flexible display structure
US20030206419A1 (en) * 2002-05-02 2003-11-06 Fatzer Ag Huber + Suhner Ag Luminous rope
US20040022053A1 (en) * 2000-12-13 2004-02-05 Avraham Sharon Electroluminescent cable and mounting system therefor
US20050152126A1 (en) * 2004-01-12 2005-07-14 Teldor Wires & Cables Ltd. Electroluminescent cable assembly and electroluminescent cable constructions included therein
WO2006030395A1 (en) * 2004-09-18 2006-03-23 Koninklijke Philips Electronics N.V. Elongated electro-optic device
US20080029720A1 (en) * 2006-08-03 2008-02-07 Intematix Corporation LED lighting arrangement including light emitting phosphor
US20080074583A1 (en) * 2006-07-06 2008-03-27 Intematix Corporation Photo-luminescence color liquid crystal display
US20080151143A1 (en) * 2006-10-19 2008-06-26 Intematix Corporation Light emitting diode based backlighting for color liquid crystal displays
US20080191890A1 (en) * 2005-03-07 2008-08-14 Anton Gustafsson Visualisation Arrangement
US20080192458A1 (en) * 2007-02-12 2008-08-14 Intematix Corporation Light emitting diode lighting system
US20080224598A1 (en) * 1996-03-26 2008-09-18 Cree, Inc. Solid state white light emitter and display using same
US20090224652A1 (en) * 2008-03-07 2009-09-10 Intematix Corporation MULTIPLE-CHIP EXCITATION SYSTEMS FOR WHITE LIGHT EMITTING DIODES (LEDs)
US20100027293A1 (en) * 2008-07-30 2010-02-04 Intematix Corporation Light Emitting Panel
US20100052560A1 (en) * 2007-05-07 2010-03-04 Intematix Corporation Color tunable light source
US20100102250A1 (en) * 2008-10-23 2010-04-29 Intematix Corporation Phosphor based authentication system
US20100123385A1 (en) * 2008-11-18 2010-05-20 Willorage Rathna Perera Electroluminescent fibers, methods for their production, and products made using them
US20100164346A1 (en) * 2008-12-31 2010-07-01 Intematix Corporation Light emitting device with phosphor wavelength conversion
US20100321919A1 (en) * 2009-06-18 2010-12-23 Intematix Corporation Led based lamp and light emitting signage
US20110110095A1 (en) * 2009-10-09 2011-05-12 Intematix Corporation Solid-state lamps with passive cooling
US20110115406A1 (en) * 2009-11-19 2011-05-19 Intematix Corporation High cri white light emitting devices and drive circuitry
US20110114360A1 (en) * 2009-11-17 2011-05-19 At&T Intellectual Property I, L.P. Visual cable identification
US20110149548A1 (en) * 2009-12-22 2011-06-23 Intematix Corporation Light emitting diode based linear lamps
US20110188228A1 (en) * 2007-03-05 2011-08-04 Intematix Corporation Light emitting diode (led) based lighting systems
US20110204805A1 (en) * 2007-04-13 2011-08-25 Intematix Corporation Color temperature tunable white light source
US20130039033A1 (en) * 2008-12-31 2013-02-14 Luma Brite Technologies Llc Lensed Cable Light Systems
CN103296048A (en) * 2013-05-22 2013-09-11 李尚霖 Electroluminescence principle based luminescent structure and display device
US8604678B2 (en) 2010-10-05 2013-12-10 Intematix Corporation Wavelength conversion component with a diffusing layer
US8610341B2 (en) 2010-10-05 2013-12-17 Intematix Corporation Wavelength conversion component
US8610340B2 (en) 2010-10-05 2013-12-17 Intematix Corporation Solid-state light emitting devices and signage with photoluminescence wavelength conversion
US8614539B2 (en) 2010-10-05 2013-12-24 Intematix Corporation Wavelength conversion component with scattering particles
US8616714B2 (en) 2011-10-06 2013-12-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US8686449B2 (en) 2007-10-17 2014-04-01 Intematix Corporation Light emitting device with phosphor wavelength conversion
US8740400B2 (en) 2008-03-07 2014-06-03 Intematix Corporation White light illumination system with narrow band green phosphor and multiple-wavelength excitation
US8783887B2 (en) 2007-10-01 2014-07-22 Intematix Corporation Color tunable light emitting device
US8807799B2 (en) 2010-06-11 2014-08-19 Intematix Corporation LED-based lamps
US8888318B2 (en) 2010-06-11 2014-11-18 Intematix Corporation LED spotlight
US8946998B2 (en) 2010-08-09 2015-02-03 Intematix Corporation LED-based light emitting systems and devices with color compensation
US8947619B2 (en) 2006-07-06 2015-02-03 Intematix Corporation Photoluminescence color display comprising quantum dots material and a wavelength selective filter that allows passage of excitation radiation and prevents passage of light generated by photoluminescence materials
US8957585B2 (en) 2010-10-05 2015-02-17 Intermatix Corporation Solid-state light emitting devices with photoluminescence wavelength conversion
US8994056B2 (en) 2012-07-13 2015-03-31 Intematix Corporation LED-based large area display
US8992051B2 (en) 2011-10-06 2015-03-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US9004705B2 (en) 2011-04-13 2015-04-14 Intematix Corporation LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion
US9115868B2 (en) 2011-10-13 2015-08-25 Intematix Corporation Wavelength conversion component with improved protective characteristics for remote wavelength conversion
US9217543B2 (en) 2013-01-28 2015-12-22 Intematix Corporation Solid-state lamps with omnidirectional emission patterns
US9252338B2 (en) 2012-04-26 2016-02-02 Intematix Corporation Methods and apparatus for implementing color consistency in remote wavelength conversion
US9318670B2 (en) 2014-05-21 2016-04-19 Intematix Corporation Materials for photoluminescence wavelength converted solid-state light emitting devices and arrangements
US9365766B2 (en) 2011-10-13 2016-06-14 Intematix Corporation Wavelength conversion component having photo-luminescence material embedded into a hermetic material for remote wavelength conversion
US9512970B2 (en) 2013-03-15 2016-12-06 Intematix Corporation Photoluminescence wavelength conversion components
US9546765B2 (en) 2010-10-05 2017-01-17 Intematix Corporation Diffuser component having scattering particles

Cited By (101)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2699362A1 (en) * 1992-12-10 1994-06-17 Jerusalem College Tech Electroluminescent light sources.
US5485355A (en) * 1992-12-10 1996-01-16 Elam-Electroluminescent Industries Ltd. Electroluminescent light sources
WO1997024015A1 (en) * 1995-12-22 1997-07-03 Add-Vision, Inc. Electroluminescent filament
US5753381A (en) * 1995-12-22 1998-05-19 Add Vision Inc Electroluminescent filament
US5876863A (en) * 1995-12-22 1999-03-02 Add-Vision, Inc. Electroluminescent filament
US8963182B2 (en) 1996-03-26 2015-02-24 Cree, Inc. Solid state white light emitter and display using same
US8860058B2 (en) 1996-03-26 2014-10-14 Cree, Inc. Solid state white light emitter and display using same
US20080224598A1 (en) * 1996-03-26 2008-09-18 Cree, Inc. Solid state white light emitter and display using same
US9698313B2 (en) * 1996-03-26 2017-07-04 Cree, Inc. Solid state white light emitter and display using same
US8659034B2 (en) 1996-03-26 2014-02-25 Cree, Inc. Solid state white light emitter and display using same
US8502247B2 (en) 1996-03-26 2013-08-06 Cree, Inc. Solid state white light emitter and display using same
US20080224597A1 (en) * 1996-03-26 2008-09-18 Cree, Inc. Solid state white light emitter and display using same
US6054809A (en) * 1996-08-14 2000-04-25 Add-Vision, Inc. Electroluminescent lamp designs
EP0838975A1 (en) * 1996-10-22 1998-04-29 Elam-Electroluminescent Industries Ltd. Electroluminescent light source
US5869930A (en) * 1996-10-22 1999-02-09 Elam-Electroluminescent Industries Ltd. Electroluminescent light source with a mixture layer filled with a transparent filler substance
GB2338332A (en) * 1997-02-28 1999-12-15 Miniflame Ltd Sign apparatus
WO1998038624A1 (en) * 1997-02-28 1998-09-03 Miniflame Limited Sign apparatus
GB2338332B (en) * 1997-02-28 2001-09-12 Miniflame Ltd Sign apparatus
US5917288A (en) * 1997-06-11 1999-06-29 Feldman; Harold Sound responsive electroluminescent visual display
US5951140A (en) * 1997-06-11 1999-09-14 Live Wire Enterprises, Inc. Display with flexible electroluminescent connector
US5945632A (en) * 1997-08-15 1999-08-31 Dimarzio Inc. Ribbon overbraid cable
US5962967A (en) * 1998-03-19 1999-10-05 Kiryuschev; Irina Electroluminescent device and method of manufacturing same
WO2000013750A1 (en) * 1998-09-02 2000-03-16 Kennet Jonson Guide light system
US6074071A (en) * 1999-06-29 2000-06-13 Elam Electroluminescent Industries Ltd. Aquarium lighting system
WO2001041511A1 (en) * 1999-12-03 2001-06-07 Mark Kok System for generating light by means of electroluminescence
NL1013742C2 (en) * 1999-12-03 2001-06-06 Mark Kok System for by means of electroluminescence generating light.
US20040022053A1 (en) * 2000-12-13 2004-02-05 Avraham Sharon Electroluminescent cable and mounting system therefor
US6851818B2 (en) 2000-12-13 2005-02-08 Teldor Wires & Cables Ltd. Electroluminescent cable and mounting system therefor
WO2002098177A1 (en) * 2001-05-31 2002-12-05 Agfa Gevaert N.V. System for generating light by means of electroluminescence
US6608438B2 (en) * 2001-11-09 2003-08-19 Visson Ip Llc 3-D flexible display structure
US7401961B2 (en) 2002-05-02 2008-07-22 Fatzer Ag Luminous wire rope
US20030206419A1 (en) * 2002-05-02 2003-11-06 Fatzer Ag Huber + Suhner Ag Luminous rope
EP1359248A3 (en) * 2002-05-02 2005-01-12 Fatzer AG Luminous rope
US20050152126A1 (en) * 2004-01-12 2005-07-14 Teldor Wires & Cables Ltd. Electroluminescent cable assembly and electroluminescent cable constructions included therein
WO2006030395A1 (en) * 2004-09-18 2006-03-23 Koninklijke Philips Electronics N.V. Elongated electro-optic device
US20080013309A1 (en) * 2004-09-18 2008-01-17 Koninklijke Philips Electronics, N.V. Elongated Electro-Optic Device
US20080191890A1 (en) * 2005-03-07 2008-08-14 Anton Gustafsson Visualisation Arrangement
US8791829B2 (en) * 2005-03-07 2014-07-29 The Interactive Institute Ii Ab Visualisation arrangement
US20080074583A1 (en) * 2006-07-06 2008-03-27 Intematix Corporation Photo-luminescence color liquid crystal display
US8947619B2 (en) 2006-07-06 2015-02-03 Intematix Corporation Photoluminescence color display comprising quantum dots material and a wavelength selective filter that allows passage of excitation radiation and prevents passage of light generated by photoluminescence materials
US9045688B2 (en) 2006-08-03 2015-06-02 Intematix Corporation LED lighting arrangement including light emitting phosphor
US9595644B2 (en) 2006-08-03 2017-03-14 Intematix Corporation LED lighting arrangement including light emitting phosphor
US20110187262A1 (en) * 2006-08-03 2011-08-04 Intematix Corporation Led lighting arrangement including light emitting phosphor
US20080029720A1 (en) * 2006-08-03 2008-02-07 Intematix Corporation LED lighting arrangement including light emitting phosphor
US20080151143A1 (en) * 2006-10-19 2008-06-26 Intematix Corporation Light emitting diode based backlighting for color liquid crystal displays
US20080192458A1 (en) * 2007-02-12 2008-08-14 Intematix Corporation Light emitting diode lighting system
US8538217B2 (en) 2007-02-12 2013-09-17 Intematix Corporation Light emitting diode lighting system
US8376580B2 (en) 2007-03-05 2013-02-19 Intematix Corporation Light emitting diode (LED) based lighting systems
US20110188228A1 (en) * 2007-03-05 2011-08-04 Intematix Corporation Light emitting diode (led) based lighting systems
US9739444B2 (en) 2007-03-05 2017-08-22 Intematix Corporation Light emitting diode (LED) based lighting systems
US8773337B2 (en) 2007-04-13 2014-07-08 Intematix Corporation Color temperature tunable white light source
US20110204805A1 (en) * 2007-04-13 2011-08-25 Intematix Corporation Color temperature tunable white light source
US20100052560A1 (en) * 2007-05-07 2010-03-04 Intematix Corporation Color tunable light source
US8783887B2 (en) 2007-10-01 2014-07-22 Intematix Corporation Color tunable light emitting device
US9458988B2 (en) 2007-10-01 2016-10-04 Intematix Corporation Color tunable light emitting device
US8686449B2 (en) 2007-10-17 2014-04-01 Intematix Corporation Light emitting device with phosphor wavelength conversion
US9476568B2 (en) 2008-03-07 2016-10-25 Intematix Corporation White light illumination system with narrow band green phosphor and multiple-wavelength excitation
US8567973B2 (en) 2008-03-07 2013-10-29 Intematix Corporation Multiple-chip excitation systems for white light emitting diodes (LEDs)
US8740400B2 (en) 2008-03-07 2014-06-03 Intematix Corporation White light illumination system with narrow band green phosphor and multiple-wavelength excitation
US9324923B2 (en) 2008-03-07 2016-04-26 Intermatix Corporation Multiple-chip excitation systems for white light emitting diodes (LEDs)
US20090224652A1 (en) * 2008-03-07 2009-09-10 Intematix Corporation MULTIPLE-CHIP EXCITATION SYSTEMS FOR WHITE LIGHT EMITTING DIODES (LEDs)
US20100027293A1 (en) * 2008-07-30 2010-02-04 Intematix Corporation Light Emitting Panel
US8822954B2 (en) 2008-10-23 2014-09-02 Intematix Corporation Phosphor based authentication system
US20100102250A1 (en) * 2008-10-23 2010-04-29 Intematix Corporation Phosphor based authentication system
US20100123385A1 (en) * 2008-11-18 2010-05-20 Willorage Rathna Perera Electroluminescent fibers, methods for their production, and products made using them
WO2010059284A1 (en) * 2008-11-18 2010-05-27 Pascale Industries, Inc. Electroluminescent fibers, methods for their production, and products made using them
US20150289342A1 (en) * 2008-12-31 2015-10-08 Light Media Industries, Llc Lensed Cable Light Systems
US9622318B2 (en) * 2008-12-31 2017-04-11 Light Media Industries, Llc Lensed cable light systems
US20130039033A1 (en) * 2008-12-31 2013-02-14 Luma Brite Technologies Llc Lensed Cable Light Systems
US20100164346A1 (en) * 2008-12-31 2010-07-01 Intematix Corporation Light emitting device with phosphor wavelength conversion
US9062860B2 (en) * 2008-12-31 2015-06-23 Light Media Industries, Llc Lensed cable light systems
US20100321919A1 (en) * 2009-06-18 2010-12-23 Intematix Corporation Led based lamp and light emitting signage
US8651692B2 (en) 2009-06-18 2014-02-18 Intematix Corporation LED based lamp and light emitting signage
US20110110095A1 (en) * 2009-10-09 2011-05-12 Intematix Corporation Solid-state lamps with passive cooling
US20110114360A1 (en) * 2009-11-17 2011-05-19 At&T Intellectual Property I, L.P. Visual cable identification
US8680400B2 (en) * 2009-11-17 2014-03-25 At&T Intellectual Property I, L.P. Visual cable identification
US8779685B2 (en) 2009-11-19 2014-07-15 Intematix Corporation High CRI white light emitting devices and drive circuitry
US20110115406A1 (en) * 2009-11-19 2011-05-19 Intematix Corporation High cri white light emitting devices and drive circuitry
US20110149548A1 (en) * 2009-12-22 2011-06-23 Intematix Corporation Light emitting diode based linear lamps
US8888318B2 (en) 2010-06-11 2014-11-18 Intematix Corporation LED spotlight
US8807799B2 (en) 2010-06-11 2014-08-19 Intematix Corporation LED-based lamps
US8946998B2 (en) 2010-08-09 2015-02-03 Intematix Corporation LED-based light emitting systems and devices with color compensation
US8604678B2 (en) 2010-10-05 2013-12-10 Intematix Corporation Wavelength conversion component with a diffusing layer
US8610340B2 (en) 2010-10-05 2013-12-17 Intematix Corporation Solid-state light emitting devices and signage with photoluminescence wavelength conversion
US8614539B2 (en) 2010-10-05 2013-12-24 Intematix Corporation Wavelength conversion component with scattering particles
US8957585B2 (en) 2010-10-05 2015-02-17 Intermatix Corporation Solid-state light emitting devices with photoluminescence wavelength conversion
US9546765B2 (en) 2010-10-05 2017-01-17 Intematix Corporation Diffuser component having scattering particles
US8610341B2 (en) 2010-10-05 2013-12-17 Intematix Corporation Wavelength conversion component
US9524954B2 (en) 2011-04-13 2016-12-20 Intematrix Corporation LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion
US9004705B2 (en) 2011-04-13 2015-04-14 Intematix Corporation LED-based light sources for light emitting devices and lighting arrangements with photoluminescence wavelength conversion
US8992051B2 (en) 2011-10-06 2015-03-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US8616714B2 (en) 2011-10-06 2013-12-31 Intematix Corporation Solid-state lamps with improved radial emission and thermal performance
US9115868B2 (en) 2011-10-13 2015-08-25 Intematix Corporation Wavelength conversion component with improved protective characteristics for remote wavelength conversion
US9365766B2 (en) 2011-10-13 2016-06-14 Intematix Corporation Wavelength conversion component having photo-luminescence material embedded into a hermetic material for remote wavelength conversion
US9252338B2 (en) 2012-04-26 2016-02-02 Intematix Corporation Methods and apparatus for implementing color consistency in remote wavelength conversion
US8994056B2 (en) 2012-07-13 2015-03-31 Intematix Corporation LED-based large area display
US9217543B2 (en) 2013-01-28 2015-12-22 Intematix Corporation Solid-state lamps with omnidirectional emission patterns
US9512970B2 (en) 2013-03-15 2016-12-06 Intematix Corporation Photoluminescence wavelength conversion components
CN103296048B (en) * 2013-05-22 2016-05-25 安徽唯象光电技术有限公司 Based on structural and electroluminescent display device the principles of the electroluminescent
CN103296048A (en) * 2013-05-22 2013-09-11 李尚霖 Electroluminescence principle based luminescent structure and display device
US9318670B2 (en) 2014-05-21 2016-04-19 Intematix Corporation Materials for photoluminescence wavelength converted solid-state light emitting devices and arrangements

Similar Documents

Publication Publication Date Title
US3261907A (en) High frequency power cable
US3354417A (en) Coil bobbin having projections extending beyond magnetic core
US3324417A (en) Shielded common return pairs and coaxial cable
US4601753A (en) Powdered iron core magnetic devices
US3617966A (en) Core and coil assembly
US4657342A (en) Flexible power cable with profiled core and support member
US3458650A (en) Composite winding for transformers
US3274329A (en) Shielded cords
US4207482A (en) Multilayered high voltage grading system for electrical conductors
US5206485A (en) Low electromagnetic and electrostatic field radiating heater cable
US2978530A (en) Conductor for transformer windings
US3007070A (en) Electroluminescent device
US3605055A (en) Two-piece winding bobbin for watt-hour meter potential coil
US4233543A (en) Internal shunt for series connected lamps
US3068433A (en) Electromagnetic coils
US3659336A (en) Method of manufacturing an inductive device
US3037068A (en) Retractile tinsel cordage
US2850707A (en) Electromagnetic coils
US3012164A (en) Plastic electroluminescent lighting articles and method of fabrication thereof
US3259688A (en) High voltage insulated electrical cable with layer of irradiated semiconductive ethylene copolymer
US4316116A (en) Triple-coil incandescent filament
US2773216A (en) Animated display device
US3264989A (en) Ignition assembly resistant to actuation by radio frequency and electrostatic energies
US3360754A (en) Transformer having reduced differential impedances between secondary portions
US3291898A (en) High voltage expanded electrical conductors