EP1621809B1 - Leuchtkörper - Google Patents
Leuchtkörper Download PDFInfo
- Publication number
- EP1621809B1 EP1621809B1 EP04018179A EP04018179A EP1621809B1 EP 1621809 B1 EP1621809 B1 EP 1621809B1 EP 04018179 A EP04018179 A EP 04018179A EP 04018179 A EP04018179 A EP 04018179A EP 1621809 B1 EP1621809 B1 EP 1621809B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- emitting diode
- focus lens
- light emitting
- focusing lens
- light
- 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
Links
- 230000003287 optical effect Effects 0.000 claims abstract description 9
- 238000011282 treatment Methods 0.000 claims description 10
- 230000007423 decrease Effects 0.000 claims description 3
- 238000005286 illumination Methods 0.000 claims description 2
- 230000020169 heat generation Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 229910052736 halogen Inorganic materials 0.000 description 1
- 150000002367 halogens Chemical class 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
Images
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
- F21V5/04—Refractors for light sources of lens shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
-
- 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 invention relates to a luminous body, in particular a portable filament for illuminating a treatment field in a medical treatment, e.g. at the dentist, or in fine mechanical work, such as in watchmaking.
- Such luminous bodies are known from the prior art.
- filaments have been developed that are small and lightweight, for example, to be worn on the head of a user.
- luminous bodies are often used, for example during operations, in addition to an operating lamp. Both in the medical and in the fine mechanical field, the luminous intensity emitted by the luminous element is of crucial importance.
- luminous bodies have been used in the prior art so far, which by means of glass fiber technology or liquid light guides emit the light.
- these luminaries have a relatively high luminous intensity, they have the disadvantage that they require an expensive, large and heavy unit, which is too large and too heavy to generate and feed the light into the fiber optic cable or into the liquid light guide to be worn on the body.
- the necessary cable is often a hindrance, as it restricts the freedom of movement
- filaments have become known, which essentially correspond to a portable, possibly held on the head by means of a belt flashlight.
- Such lamps are classically equipped with a normal light bulb. If such portable flashlights are powered by batteries, then they are relatively light and thus portable; however, the disadvantage of this variation is that with such bulb operated lamps, 80 percent of the energy is converted to heat while only 20 percent of the energy is converted to light.
- Such solutions are therefore often too faint with still acceptable battery size to come in the targeted applications of medical treatment or precision engineering as a portable filament for use. For even the attempt to increase the light output by increasing the overall performance, does not succeed in such conventional lamps, because then the lamp is too hot, so that the treatment field too strong - not acceptable in the medical field - experiences heat by such a lamp ,
- U.S. Patent 6,478,453 B1 is a luminous body with the features listed in the preamble of claim 1 known.
- the invention includes the knowledge that the use of a light-emitting diode as the light source on the one hand provides a light and therefore portable light-emitting body, and on the other hand low heat generation can be recorded simultaneously with low energy consumption. In this way, the known from the prior art problems with excessive heat generation are successfully avoided by the use of a light emitting diode as the lighting means of the luminous body according to the invention.
- a second focusing lens which is arranged in front of the first focusing lens in the emission direction of the light-emitting diode. If such a second focusing lens, preferably with a certain radius of curvature, is arranged on the optical axis of the first focusing lens at a certain distance from the first focusing lens, it is possible to have a typical treatment distance of about 25 cm to about 50 cm for the application areas mentioned at the outset to achieve a light intensity of about 19,000 lux to about 50,000 lux.
- the efficiency of the luminous element according to the invention is considerably higher, since a light-emitting diode converts about 80 percent of the energy into light and only about 20 percent of the energy into heat energy. It is thus possible to work with the luminaires according to the invention also with the help of batteries for a very long time, without sacrificing the high levels of light in the previously mentioned area.
- These special housing forms exploit the knowledge according to the invention that in the application areas cited in the medical or precision engineering field, the evaluation of luminous bodies based exclusively on the achievable maximum light intensity in particular at a distance of about 25 cm to about 50 cm, preferably at a distance of About 30 cm, from the LED is made.
- maximizing the size of the light cone plays only a minor role, since the treatment fields in the application areas cited at the beginning are usually very small.
- a light cone with a diameter of about 3 cm to about 8 cm at a distance of about 25 cm to about 50 cm, preferably at a distance of about 30 cm, from the light-emitting diode to deliver. It can therefore be made with the help of the housing according to the invention on the lenses used further focusing the light beam generated by the light emitting diode to the light intensity at a distance of about 25 cm to about 50 cm, preferably at a distance of about 30 cm, from the To maximize light emitting diode.
- housing with a certain opening angle is preferably used.
- Aperture angles of from about 40 ° to about 80 °, preferably from about 50 ° to about 70 °, more preferably from about 58 ° to about 64 ° are preferred.
- an outer contour of the second focusing lens is slightly larger than the opening angle of the housing, e.g. by about 1 ° to about 2 °, larger opening angle. Because in this way, an air gap can be made available between the second focusing lens and housing. This air gap leads to a further optimization of the light output.
- Fig. 1 shows a first embodiment 1 of a filament according to the invention.
- the luminous body 1 shown in FIG. 1 which is suitable in particular as a portable filament 1 for the illumination of a medical or precision mechanical treatment field, has a rotationally symmetrical, substantially funnel-shaped housing 2 about the axis of rotation 2a.
- a light emitting diode 4 In the housing 2 is a light emitting diode 4.
- This light emitting diode 4 is from an energy source, not shown, e.g. a portable battery, supplied with power via a line not shown in a known manner.
- the first focusing lens 6 has a radiation profile, which substantially corresponds to a Lambert curve.
- the first focusing lens 6 is made of glass or any other suitable transparent and refractive material.
- the first focusing lens 6 has substantially the shape of a hemisphere.
- the hemisphere has a radius of curvature of 2.5 mm.
- the hemisphere has in the emission direction 2a of the light emitting diode 4 - in Fig. 1 upwards - the curvature of the hemisphere.
- the hemisphere is extended below a section 5 inserted in the drawing only for reasons of better understanding in the drawing, by a section 6a in a downward cylindrical manner in the direction of the light-emitting diode.
- the section 6a is shown delineated only in the drawing by the line 5.
- the portion 6a is integrally connected to the hemisphere of the lens 6 and therefore also made of the same material as the hemisphere and has the same diameter of 5 mm as the hemisphere.
- the diameter of section 6a substantially corresponds to the diameter of a light-emitting part (not shown in detail in FIG. 1) of light-emitting diode 4.
- a second focusing lens 8 is further provided.
- the second focusing lens 8 is made of PMMA crystal, but may be made of glass or any other suitable transparent and refractive material.
- the second focusing lens 8 has a substantially cylindrical recess 10.
- the recess 10 faces the first focusing lens 6.
- the depth p (see FIG. 3) of the recess 10 is such that the first focusing lens 6, including its portion 6 a, fits completely within the recess 10.
- One of the first focusing lens 6 facing bottom 12 of the recess 10 is formed curved in the direction of the first focusing lens 6.
- a distance a between the first focusing lens 6 and the bottom 12 is present along the optical axis 2a of the first focusing lens 6, a distance a between the first focusing lens 6 and the bottom 12 is present.
- the distance a is 1.8 mm.
- the radius of curvature of the bottom 12 is about 9 mm and is therefore substantially greater than the 2.5 mm radius of curvature of the bottom 12 facing hemispherical surface of the first focusing lens. 6
- embodiments with an outer diameter of about 24 mm to about 35 mm are possible. In this case, the remaining dimensions should be adjusted accordingly.
- the portion 14 of the outer wall 16 of the second focusing lens 8 highlighted in FIG. 3 runs parallel to the optical axis 2a of the first focusing lens 6 and the second focusing lens 8 applies to the clearly highlighted in Fig. 2 upper portion 18 of the inner wall 20 of the housing 2.
- the dimensions e and d can be varied as desired and also be the same size.
- the second focusing lens 8 has, between the section 14, its outer surface 16 and its bottom 24, a sloping section 26 tapering towards the light-emitting diode 4 in the shape of a truncated cone.
- air gap 30 is present between the inclined outer surface 26 of the second focusing lens 8 and a corresponding also truncated cone-shaped inclined portion 28 of the inner wall 20 of the housing 2.
- the air gap 30 decreases continuously from its maximum extent in the immediate vicinity of the light emitting diode 4 in the direction of the upper portion 14. In the region of section 14, no air gap is present between outer wall 14 and inner wall 18 of housing 2.
- the dimensions g and h can be varied as desired and also be the same size.
- the area 34 filled with air underneath the light-emitting diode 4 can be used, for example, to guide power cables to supply the light-emitting diode 4.
- FIG. 2 shows an enlarged view of the housing 2 of the first embodiment 1 of FIG. 1.
- FIG. 2 serves in particular for the exact and essential to the invention representation of the opening angle a of the lower portion 28 of the inner wall 20 of the housing 2.
- This opening angle ⁇ is in the first illustrated in Figs. 1 and 2 embodiment 1 of the filament 58 ° according to the invention.
- the inclination angle ⁇ measured on the outer surface 34a of the housing 2 of the outer surface of the housing 2 is 60 °.
- the maximum outer diameter i of the housing 2 in the region of the portion 18 of the housing 2 is 28 mm. Since the wall thickness of the housing 2 are arbitrarily increased, inclination angle ⁇ and maximum outer diameter i of the housing 2 can also assume any other values.
- the air gap 30 shown in FIG in Fig. 1 illustrated continuously decreasing manner.
- Fig. 3 shows the second focusing lens 8 alone.
- the height p is chosen so that the first focusing lens 6 can be completely absorbed in the recess 10 and on the other hand, the distance a shown in FIG. 1 can be maintained.
- the diameter q of the recess 10 is chosen so that the first focusing lens 6 easily, i. still with a slight play, can be inserted into the recess 10. As can be seen from FIG. 1, a direct contact between the first focusing lens 6 and the second focusing lens 8 in the region of the recess 10 is undesirable.
- FIG. 4 shows a cross section through a second embodiment 200 of the filament according to the invention. Identical or functionally identical parts are designated by the same reference numerals as in the previous figures.
- the second embodiment 200 essentially corresponds to the first embodiment 1 shown in FIG. 1.
- the dimensions which are arbitrarily variably described in the above embodiment as beyond the tolerance customary to the person skilled in the art can also be varied as desired in this embodiment 200.
- the opening angle ⁇ of the housing 2 in the region of the section 28 of the inner wall 20 of the housing 2 was changed in the second embodiment 200, in particular.
- This change in the opening angle ⁇ is shown enlarged in FIG. 5 for the housing 2 alone.
- the angle ⁇ is in the in FIGS. 4 and 5 illustrated second embodiment 200 64 °. Due to this larger opening angle a extends in the embodiment 200 shown in FIG. 4, the air gap 30 further upward toward the upper portion 14 of the second focusing lens 8 and the upper portion 18 of the inner wall 20 of the housing 2. Because the inclination of the lower Section 26 of the second focusing lens 8 has remained unchanged at 32.5 ° in the second embodiment 200 compared to the first embodiment 1. There is thus a slower decrease of the air gap 30.
- the power of the light emitting diode 4 is 3 W. With such power, a maximum heat of approximately 55 ° C., but at least less than 60, results ° C.
- Both filaments 1 and 200 are, in particular due to the dimensions shown in detail above, fastened and portable by means of a corresponding attachment to the head of a user.
- the light-emitting diode 4 can be advantageously connected via the open region 34 of the housing 2 with the aid of power cables, not shown, to a mobile energy source, for example a portable battery.
- a mobile energy source for example a portable battery.
- This battery can for example also be worn on the body of a user of the filament according to the invention, so that a total of a mobile and portable light is provided.
- Both the first embodiment 1 of the filament according to the invention and the second embodiment 200 shown in FIG. 1 generate at a distance of about 30 cm from the second focusing lens 8 along the optical axis 2a in a cone of light of about 3 cm to about 8 cm in diameter
- Light intensity of about 30,000 lux can generate a light intensity of about 50,000 lux at a distance of about 30 cm from the second focusing lens 8 along the optical axis 2a in a light cone of about 3 cm to about 8 cm in diameter.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
- Led Device Packages (AREA)
- Electroluminescent Light Sources (AREA)
- Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
- Automatic Focus Adjustment (AREA)
- Luminescent Compositions (AREA)
- Securing Globes, Refractors, Reflectors Or The Like (AREA)
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04018179A EP1621809B1 (de) | 2004-07-30 | 2004-07-30 | Leuchtkörper |
AT04018179T ATE380976T1 (de) | 2004-07-30 | 2004-07-30 | Leuchtkörper |
PL04018179T PL1621809T3 (pl) | 2004-07-30 | 2004-07-30 | Korpus oświetleniowy |
ES04018179T ES2294407T3 (es) | 2004-07-30 | 2004-07-30 | Estructura de lampara. |
DE502004005705T DE502004005705D1 (de) | 2004-07-30 | 2004-07-30 | Leuchtkörper |
US11/028,442 US7222991B2 (en) | 2004-07-30 | 2004-12-31 | Light source for precision work |
AU2005202265A AU2005202265B2 (en) | 2004-07-30 | 2005-05-25 | Light source for precision work |
JP2005173359A JP2006049283A (ja) | 2004-07-30 | 2005-06-14 | 発光体 |
KR1020050060891A KR20060049901A (ko) | 2004-07-30 | 2005-07-06 | 발광체 |
CA002511253A CA2511253C (en) | 2004-07-30 | 2005-07-27 | Light source for precision work |
CNA2005100873189A CN1727744A (zh) | 2004-07-30 | 2005-07-28 | 发光体 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04018179A EP1621809B1 (de) | 2004-07-30 | 2004-07-30 | Leuchtkörper |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1621809A1 EP1621809A1 (de) | 2006-02-01 |
EP1621809B1 true EP1621809B1 (de) | 2007-12-12 |
Family
ID=34926015
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04018179A Expired - Lifetime EP1621809B1 (de) | 2004-07-30 | 2004-07-30 | Leuchtkörper |
Country Status (11)
Country | Link |
---|---|
US (1) | US7222991B2 (ko) |
EP (1) | EP1621809B1 (ko) |
JP (1) | JP2006049283A (ko) |
KR (1) | KR20060049901A (ko) |
CN (1) | CN1727744A (ko) |
AT (1) | ATE380976T1 (ko) |
AU (1) | AU2005202265B2 (ko) |
CA (1) | CA2511253C (ko) |
DE (1) | DE502004005705D1 (ko) |
ES (1) | ES2294407T3 (ko) |
PL (1) | PL1621809T3 (ko) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWM315936U (en) * | 2007-01-24 | 2007-07-21 | Polytronics Technology Corp | High-power LED lamp and LED device thereof |
GB0721060D0 (en) * | 2007-10-29 | 2007-12-05 | Pilkington Group Ltd | Optical inspection |
CN103133987B (zh) * | 2011-11-22 | 2016-04-13 | 海洋王照明科技股份有限公司 | Led透镜及含有该led透镜的led灯具 |
CN102980073A (zh) * | 2012-12-15 | 2013-03-20 | 邱旭 | 一种小夜灯 |
WO2014142816A1 (en) * | 2013-03-13 | 2014-09-18 | Ofs Fitel, Llc | Light-emitting diode input for hybrid solar lighting systems |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5839357A (ja) * | 1981-08-31 | 1983-03-08 | Sanyo Electric Co Ltd | Ramのアドレス方法 |
US5042048A (en) * | 1990-03-02 | 1991-08-20 | Meyer Brad E | Target illuminators and systems employing same |
US5173810A (en) * | 1991-08-21 | 1992-12-22 | Aisens Co., Ltd. | Light transmitting lens for use with a photoelectric sensor |
WO2000024062A1 (en) * | 1998-10-21 | 2000-04-27 | Koninklijke Philips Electronics N.V. | Led module and luminaire |
JP2002532893A (ja) * | 1998-12-17 | 2002-10-02 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | 光エンジン |
TW512214B (en) * | 2000-01-07 | 2002-12-01 | Koninkl Philips Electronics Nv | Luminaire |
US20040264196A1 (en) * | 2003-06-30 | 2004-12-30 | Kuo-Fen Shu | LED spotlight (type I) |
-
2004
- 2004-07-30 ES ES04018179T patent/ES2294407T3/es not_active Expired - Lifetime
- 2004-07-30 AT AT04018179T patent/ATE380976T1/de not_active IP Right Cessation
- 2004-07-30 PL PL04018179T patent/PL1621809T3/pl unknown
- 2004-07-30 EP EP04018179A patent/EP1621809B1/de not_active Expired - Lifetime
- 2004-07-30 DE DE502004005705T patent/DE502004005705D1/de not_active Expired - Lifetime
- 2004-12-31 US US11/028,442 patent/US7222991B2/en not_active Expired - Fee Related
-
2005
- 2005-05-25 AU AU2005202265A patent/AU2005202265B2/en not_active Ceased
- 2005-06-14 JP JP2005173359A patent/JP2006049283A/ja active Pending
- 2005-07-06 KR KR1020050060891A patent/KR20060049901A/ko not_active Application Discontinuation
- 2005-07-27 CA CA002511253A patent/CA2511253C/en not_active Expired - Fee Related
- 2005-07-28 CN CNA2005100873189A patent/CN1727744A/zh active Pending
Also Published As
Publication number | Publication date |
---|---|
JP2006049283A (ja) | 2006-02-16 |
CA2511253A1 (en) | 2005-10-15 |
ES2294407T3 (es) | 2008-04-01 |
CN1727744A (zh) | 2006-02-01 |
ATE380976T1 (de) | 2007-12-15 |
DE502004005705D1 (de) | 2008-01-24 |
KR20060049901A (ko) | 2006-05-19 |
PL1621809T3 (pl) | 2008-05-30 |
AU2005202265A1 (en) | 2006-02-16 |
AU2005202265B2 (en) | 2008-08-07 |
CA2511253C (en) | 2007-05-29 |
US20060023458A1 (en) | 2006-02-02 |
EP1621809A1 (de) | 2006-02-01 |
US7222991B2 (en) | 2007-05-29 |
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