EP1536668A1 - Induktionsherd - Google Patents

Induktionsherd Download PDF

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Publication number
EP1536668A1
EP1536668A1 EP03741372A EP03741372A EP1536668A1 EP 1536668 A1 EP1536668 A1 EP 1536668A1 EP 03741372 A EP03741372 A EP 03741372A EP 03741372 A EP03741372 A EP 03741372A EP 1536668 A1 EP1536668 A1 EP 1536668A1
Authority
EP
European Patent Office
Prior art keywords
light
lights
light source
induction heating
coil
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.)
Granted
Application number
EP03741372A
Other languages
English (en)
French (fr)
Other versions
EP1536668A4 (de
EP1536668B1 (de
Inventor
Tetsuya Kaji
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP1536668A1 publication Critical patent/EP1536668A1/de
Publication of EP1536668A4 publication Critical patent/EP1536668A4/de
Application granted granted Critical
Publication of EP1536668B1 publication Critical patent/EP1536668B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
    • H05B6/1218—Cooking devices induction cooking plates or the like and devices to be used in combination with them with arrangements using lights for heating zone state indication
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00—Illuminated signs; Luminous advertising
    • G09F13/18—Edge-illuminated signs

Definitions

  • the present invention relates to an induction heating cooker with household use and more specifically a light emitting part for make an optical pictogram on the top plate on which is placed a dish to heat such as a dish in pan.
  • An induction heating cooker uses a magnetic field high frequency generated by a heating coil traversed by a current at high frequency and therefore to an eddy current generated through this high frequency magnetic field on a pan (a charge) coupled magnetically with the heating coil.
  • This eddy current gives birth to a heat by Joule effect at the level of the pan, heat allowing the pan to heat up itself and therefore to cook.
  • Induction heaters are, however, disadvantage: it is impossible to control (perceive) visually the state of the induction heating because the pan itself heats up unlike of a gas cooker for which the flames are visible and a electric heating for which the heating part is incandescent.
  • FIG. 7 is a sectional view of the cooker with conventional induction heating according to the prior art described in said newspaper official.
  • FIG. 7 shows a plate 2 made of insulating material on a main body 1 forming a frame. It's on this top plate 2 that is placed an object to be heated 3 such as a pan. Then, we find, under the top plate 2, a heating coil 4 for heating the object to heat 3 by induction. Finally, under the heating coil 4, there is a part 5.
  • the light emitting part 5 is composed of a light source 6 and a light pipe 7 and the lights emanate from the emitting face 8 to the top plate 2 which is translucent.
  • the command of the coil and the light emitting part 5 is provided by a block of order 9.
  • the heating coil 4 When the heating coil 4 is crossed by a high current determined frequency, the object to be heated 3 is heated by induction.
  • the light source 6 lights up and, its lights, guided by the light pipe 7, emanate from the emitting face light 8 to radiate the underside of the top plate 2.
  • These lights pass through the top plate 2 and reach his face upper and an annular luminous pattern represented by hatching in Figure 8 is created on the upper face of the top plate 2. This pattern allows a cooker user to visually identify (perceive) the area of the top plate 2 facing the (and lying just above) heating coil 4 brought to a high temperature by induction by the turn on this light pattern.
  • a duct fan segment 7a of light and a light source 6 disposed on the receiver portion of 7a of light pipe segment 7a form a block of the conduit of light 7 as shown in Figure 9 which is a close-up of the parts main.
  • a plurality (6 to 8 for example) of such blocks formed, according to said prior art, an annular light emitting portion 5 as shown in Figure 8. It is therefore necessary to gather a good number of blocks for producing the annular light emitting portion 5 and cabling up to each light source 6 in a space particularly limited after this meeting of blocks. So, the prior art had as disadvantages a high number of component parts as well as of operative steps. There was also a motive of sharpness of the motive annular luminous due to the irregularity of the luminosity and the light leak, these two phenomena stemming from the importance of the number of sources of light.
  • the wind beam of cooling sent by the fan (not drawn) arranged on the bottom of the main body 1 to the heating coil 4 is intercepted by the conduit of light 7 and therefore the heating coil 4 is not sufficiently cooled due to the fact that the disk-shaped part of the light pipe 7 is arranged under the heating coil 4.
  • the object of the present invention is to propose a heat induction having an improved light emitting portion providing a better brightness thanks to less loss of the lights transmitted in the led light, with a lesser irregularity of brightness and a less light leakage.
  • the induction heating cooker includes a coil holder for carrying a heating coil, a conduit formed on the perimeter of said heating coil, a source of light emitting the lights to a light receiving portion of said duct of light and a compartment in which is stowed said light source.
  • Said serpentine holder and said light source form a single set and said coil holder is equipped with a light-shielding screen that avoids any dissipation of unwanted lights. This arrangement allows to direct the lights reflected on the coil holder towards the wall of the light pipe constituting the light source compartment and intensify the lights emanating from this wall.
  • the induction heating cooker comprises a heating coil for heating a product to be heated by induction, a coil holder for carrying said heating coil, a light pipe formed on the perimeter of said heating coil, a light source emitting the lights to a light-receiving portion of said lead of light and a compartment in which is stowed said light source.
  • Said serpentine holder and said light source form a single set and said coil holder is equipped with a light-shielding screen that avoids any dissipation of unwanted lights. This arrangement allows to direct the lights reflected on the coil holder towards the wall of the light pipe constituting the light source compartment and intensify the lights emanating from this wall. It also reduces the irregularity of the color and brightness on the entire light pipe.
  • the induction heating cooker according to claim 2 is arranged, particular in the arrangement according to claim 1, so that the The coil holder is designed to intercept lights emanating from the perimeter of the light pipe. This limits the radiation bright side walls of the light pipe and reduce the irregularity of the color and brightness over the entire light pipe because the light radiation from the light emitting face become more intense.
  • the induction heating cooker according to claim 3 is equipped with particularly in the arrangement according to claim 1 or 2, a plate carrying a light source. Said plate, if it consists of material shading, avoids any light leakage to the outside and reduces the irregularity of the color and brightness.
  • the induction heating cooker according to claim 4 is arranged, particularly in the arrangement according to claim 3, so that least part of said plate is equipped with a non-transparent layer to the light. This arrangement prevents any leakage of lights to the outside.
  • the induction heating cooker according to claim 5 is arranged, in particular in the arrangement according to any one of claims 1 to 3, in such a way that a light-tight screen intercepting the lights emanating from the light source is mounted on the coil holder.
  • This arrangement avoids any light leakage from the upper part of the light source compartment and helps reduce the irregularity of the color and brightness, because the light radiation of the emitting face of light become more intense.
  • the induction heating cooker according to claim 6 is arranged, particularly in the arrangement according to claim 5, so that the light-tight screen intercepts the lights emitted by the party receiver of light formed on the light pipe. This arrangement avoids any light leakage from the light receiving portion.
  • the induction heating cooker according to claim 7 is arranged, particularly in the arrangement according to claim 6, such that a part of said light-receiving part is equipped with a light diffuser.
  • This arrangement allows a better reflection of the incident lights of the receiving part of light and therefore to increase the amount of lights sent to the light pipe that is in front of the party receiver of light.
  • the induction heating cooker according to claim 8 is arranged, particular in the arrangement according to claim 1, so that the light source be equipped with a light-shielded screen that avoids any dissipation of unwanted lights.
  • the installation of this waterproof screen to the light covering the lateral part of the light source allows to increase the amount of light sent from the front of the light source towards the light receiving face of the light pipe.
  • FIG. 1 is an exploded perspective view of a main portion of the induction heating cooker according to the invention.
  • Figure 2 is a view of above the light emitting face of this same heat-heated cooker induction and
  • Figure 3 is a sectional view along the plane III-III of Figure 2.
  • the FIG. 4 is a top view of the heating coil assembly of FIG. induction heating cooker of the exemplary embodiment.
  • the layout of base of the induction heating cooker according to this embodiment being practically the same as that of classical shown in Figure 7, the elements common to these two examples of achievement will be assigned a same reference and will not be described in detail. According to the need, we refer to Figure 7.
  • light-emitting device 55 consists of a light source 26 and a annular light conduit 30 having a quadrangular section.
  • the conduit of light 30 is a translucent plastic annular piece having a section quadrangular, as shown in Figure 3.
  • the faces outer and inner cylindrical of this duct are mirror polished and that the play between the outer and inner faces, ie the thickness of the part cylindrical be uniform.
  • its plastic material should preferably have a low number of beams of lights on the inside and an important optical refractive index.
  • the source of light 26 is preferably a light emitting diode.
  • a part of the cylindrical outer face of the light pipe 30 is equipped with a part receiving light 11 for routing the lights emanating from the light source 26 towards the annular portion.
  • the light receiving part 11 is a translucent piece shaped wedge.
  • the light receiving part 11 comprises two light-receiving faces 12 arranged one-to-one at a determined distance from the outer circumferential face 30a of the light 30 and a slope 11a whose thickness gradually decreases each light-receiving face 12 towards the outer circumferential face 30a.
  • the light source 26 mounted on the plate 19 is disposed in front of each light-receiving face12.
  • the reflectivity of the the sealing surface between the receiving portion 11 and the light pipe 30 is null or extremely weak. It is better to improve this transmission efficiency, to involve the silicone oil having a optical refraction lying between those two parts.
  • the bottom 30b of the light pipe 30 is coated with a layer optical reflector 13 such as a layer deposited by evaporation under empty which reflects the lights traveling from the light pipe 30 towards the bottom 30b.
  • the lights reflected on the optical reflective layer 13 emanate of the light emitting face 14 disposed on the upper face of the conduit of light 30 and move upwards or enter the air.
  • the face light emitter 14, hatched in FIG. 1 does not represent a section, but means that its upper face is rigorous.
  • the reflective layer optical 13 can receive on its bottom 30b a non-translucent paint and having a high reflectivity such as a silicone resin paint. he is also possible to apply sticky tape or tape on this bottom 30b. It is Moreover, it is possible to make a reflective layer 13 by the means such as a formation of irregularities.
  • the roughness of the face light emitter 14, for example by a formation of fine irregularities or a significant number of shallow grooves at the level of the part high, that is to say on the upper face of the annular light duct 30, allows to increase the amount of lights coming out of this surface.
  • the lights entering the light pipe 30 by its part light receiver 11 are then transmitted along the light pipe 30 as shown by the arrows 40 and 41 in Figure 2.
  • the lights at their transmission along the light pipe 30, propagate between the faces lateral 14a and external 14b by repeating their total reflection and without never leak outside these inner side faces 14a and outer 14b.
  • the incident lights propagate in the led light 30 in a clockwise direction and the others in the opposite direction, because there are 2 sources of lights 26 radiating the 2 light-receiving portions 11, i.e., left and right, which send the lights towards the light pipe 30.
  • the intensity of the lights radiated towards the outside by the different portions of the annular light emitting face 14 of the light pipe 30 is the sum of the intensities of the lights sent in both ways.
  • the intensity of the lights radiated outwards by the different portions of the light emitting face 14 is practically uniform throughout the perimeter of the annular light emitting face 14.
  • the portion L near the light receiving portion 11 of the duct light 30, shown in FIG. 2 is a point of arrival of the lights in from the two light-receiving parts 11 and having traveled all around the light pipe 30.
  • the quantity of lights tends to decrease slightly during this journey. That's why the brightness of the ring of light on the top plate vis-à-vis this part L lowers slightly and easily exhibits irregularities of light. In this mode of realization, this problem is solved by the arrangement described below.
  • FIG. 4 is a top view.
  • the heating coil 4 is placed on the coil-carrier 15. At the bottom of this heating coil 4, there is a large space (not drawn) to put the cooling wind directly in contact with the heating coil 4.
  • the coil holder 15 has a side wall light shield 15a for stopping lights from the light pipe 30.
  • the perimeter of the heating coil 4 is equipped with a leak-proof ring magnet 16 made of a conductive material such as aluminum to prevent any magnetic leak.
  • the light pipe 30 is disposed between the ring magnetic anti-leakage device 16 and the sidewall 15a of the coil-holder 15.
  • the light source compartment 17 and the coil holder 15 form a together.
  • the source compartment of light 17 is a private bottom space and located between the coil holder 15 and the light pipe 30.
  • the light-tight screen 18 covering the upper face at 20.
  • the light-tight screen 18 and the plate 19 are respectively fixed on the top and bottom of the compartment of light source 17 with the screws 20 serving as clamping means.
  • the screen 18 is provided on its underside with means for reflecting lights such as a layer of aluminum foil or paint reflective to avoid any emanation of lights from the light source 25 the upper side and to get the lights back into the light 30 by reflecting them on the light-tight screen 18.
  • FIG. 5 Another arrangement of the light-tight screen 18 consists of as shown in Figure 5, to arrange the extensions 18a and 18b serving light-proof screen on light-shielded screen 48 and use this light-shielded screen 48 so as to hide the upper face of the light-receiving part 11.
  • Plate 19 carries 2 light sources 26 located opposite the light-receiving parts 11.
  • the upper face of the plate 19 is provided with means for reflecting the lights such as a layer of sheet metal or a reflective paint, means similar to those for the underside of the light-shielded screen 18.
  • the plate 19 of FIG. 1 is equipped with a connector 21 and this connector 21 is electrically connected to the light source 6 on the plate 19.
  • the connector 21 is installed so as to be positioned in the part lower part of the coil-holder 15 when the plate 19 is fixed on the light source compartment 17. This arrangement facilitates the assembly of supply leads on the connector 21.
  • This ring optic is used to indicate the position of the heating coil 4.
  • the ring magnetic leakage device 16 disposed on the inner periphery of the conduit of light 30 as well as the side wall of the coil holder 15, disposed on the external periphery of this same duct, avoid any light leakage by inner and outer faces of the light pipe 30. The lights emanate therefore effectively the light emitting face 14.
  • the intensity of the lights emanating from the light emitting face 14 decreases slightly as they move away from the game receiving light 11, because these lights entering through the receiving part of light 11 are circularly guided inside the light pipe 30 while radiating outward.
  • the part L (FIG. light 30 forming the wall of the light source compartment 17 is a point arrival lights from the two light-receiving parts 11 and having traveled all around the light pipe 30. That is why the intensity of the lights falls and therefore the brightness of the emitting face light 14 of Part L may be lower than other parts.
  • light source compartment 17 is provided at its upper part with a light-shielded screen 18 and, in its lower part, a plate 19.
  • the side wall of the coil-holder 15 is made of light-tight material which makes it difficult for the lights of the source 26 to escape to the outside. That's why that most of the lights emitted by the light source 26 but not having penetrated into the light-receiving portion 11 are reflected in a manner repeated inside the light source compartment 17 and another part lights enter the light pipe 30 through its receiving portion of light 11.
  • the roughness of the upper faces of the receiving part of light increases the amount of lights emanating from these faces 11c and 11d.
  • the roughness as described above of the wall (sic) 30a of the light pipe 30 of the part L and 30d opposite inside face can increase the amount of lights penetrating into the light pipe 30 and consequently to increase the quantity of lights emanating from the light emitting face 14 of the part L.
  • a simple arrangement of placing an annular light pipe 30 on the periphery of the heating coil 4 can display a small annular optical pattern irregular on the top plate 2.
  • a light-tight screen 18 or 48 covering the light source compartment 17 not only prevents any leakage lights, but also to make invisible the light-receiving part 11 of the light pipe 30 and the light sources 26, which contributes to the aesthetics of the induction heating cooker.
  • a light pipe 30 ring shape has been described, but the invention is not limited to this mode of embodiment and the light conduit may be of any shape, for example hexagonal.
  • a light pipe of given shape makes it possible to display on the plate from above a pattern having this shape.
  • the shape of the section of the led of light is in no way limited to a rectangle shown in the figure 3, but can be any, for example a trapezium.
  • the plate 19 carrying the light sources 26 passes more or less the lights but, according to this embodiment, it is preferable to be light-proof. That's why a translucent plate is coated with paint and some of this coating is protected by a light-proof screen to prevent light from passing through. Moreover, the prohibition of any passage of light by the formation of a layer light-tight on the plate 19 can increase the amount of light penetrating into the light pipe through its side wall and therefore the amount of light emanating from the light emitting face 14. This provision further reduces the irregularities of the brightness of the face light emitting 14. The weakness of the amount of light leakage at level of the underside of the heating coil assembly 15 avoids any presence of the light leak in the aim of the user looking from above and it will not feel discomfort.
  • the present embodiment thus aims to shade the light source compartment 17 and therefore to exploit more effectively the light rays from the source e light 2 and the invention is not limited to this embodiment provided that it achieves this goal.
  • the lights emanating from a light source penetrate into an annular light pipe and translucent by its face side and out through its light emitting face which is a side face ring of this same light pipe.
  • the lights entering the conduit of light pass through this ring-shaped conduit by repeating a reflection total on the cylindrical face serving as lateral wall, thus allowing the relatively uniform distribution of the lights inside the light pipe and reduce irregularities in the amount of outgoing light at the level of each annular part. It is then possible to display an optical pattern of a relatively uniform brightness.
  • the light pipe, located around the heating coil does not disturb the bottom cooling ventilation of coil and therefore does not affect the cooling of this coil of heater.
  • the present invention provides, at the level of a heat private induction of fire and heating element, a light emitting part sharper with better brightness thanks to less loss of lights transmitted in the light pipe of a display device optical by the lights emitted by the means of emission of lights on the top plate generating a magnetic field for induction heating, with less unevenness of brightness and less light leakage.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Induction Heating Cooking Devices (AREA)
EP03741372.1A 2002-07-12 2003-07-14 Induktionsherd Expired - Fee Related EP1536668B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2002203840 2002-07-12
JP2002203840 2002-07-12
PCT/JP2003/008887 WO2004023846A1 (ja) 2002-07-12 2003-07-14 誘導加熱調理器

Publications (3)

Publication Number Publication Date
EP1536668A1 true EP1536668A1 (de) 2005-06-01
EP1536668A4 EP1536668A4 (de) 2012-05-16
EP1536668B1 EP1536668B1 (de) 2014-01-08

Family

ID=31972365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03741372.1A Expired - Fee Related EP1536668B1 (de) 2002-07-12 2003-07-14 Induktionsherd

Country Status (7)

Country Link
EP (1) EP1536668B1 (de)
JP (1) JP4081086B2 (de)
KR (1) KR100917726B1 (de)
CN (1) CN100456897C (de)
AU (1) AU2003298883A1 (de)
HK (1) HK1080672A1 (de)
WO (1) WO2004023846A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458934A1 (de) * 2009-07-24 2012-05-30 Panasonic Corporation Kochvorrichtung
US8912471B2 (en) 2009-07-24 2014-12-16 Panasonic Corporation Heating cooker

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4569501B2 (ja) * 2006-03-20 2010-10-27 パナソニック株式会社 加熱調理器
JP5067285B2 (ja) * 2008-06-30 2012-11-07 パナソニック株式会社 加熱調理器
JP4831214B2 (ja) * 2009-07-01 2011-12-07 パナソニック株式会社 誘導加熱調理器
WO2012137517A1 (ja) * 2011-04-08 2012-10-11 パナソニック株式会社 誘導加熱調理器
EP3104664B1 (de) 2015-06-10 2021-03-31 Electrolux Appliances Aktiebolag Kochfeld mit heizzonenbeleuchtungsmitteln
EP3386271B1 (de) * 2017-04-07 2021-05-19 Electrolux Appliances Aktiebolag Optisches system und induktionskochfeld mit optischem system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001041510A1 (fr) * 1999-12-02 2001-06-07 Matsushita Electric Industrial Co., Ltd. Plaque de cuisson a induction
EP1213543A1 (de) * 2000-12-08 2002-06-12 Kabushiki Kaisha Toshiba Kochheizung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6321297A (ja) 1986-07-10 1988-01-28 Murata Mfg Co Ltd 酸化亜鉛圧電結晶薄膜の製造方法
JPH0514302Y2 (de) * 1988-02-19 1993-04-16
JP2604417Y2 (ja) * 1993-09-30 2000-05-15 日本精機株式会社 表示装置
JP3405298B2 (ja) * 1999-12-02 2003-05-12 松下電器産業株式会社 誘導加熱調理器
JP3647721B2 (ja) * 2000-05-30 2005-05-18 リンナイ株式会社 加熱調理器
CN2432751Y (zh) * 2000-06-23 2001-05-30 北京福瑞德机电新技术公司 电磁烹调炉
JP3770154B2 (ja) * 2001-12-25 2006-04-26 松下電器産業株式会社 誘導加熱調理器

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001041510A1 (fr) * 1999-12-02 2001-06-07 Matsushita Electric Industrial Co., Ltd. Plaque de cuisson a induction
EP1213543A1 (de) * 2000-12-08 2002-06-12 Kabushiki Kaisha Toshiba Kochheizung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2004023846A1 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2458934A1 (de) * 2009-07-24 2012-05-30 Panasonic Corporation Kochvorrichtung
EP2458934A4 (de) * 2009-07-24 2014-08-06 Panasonic Corp Kochvorrichtung
US8912471B2 (en) 2009-07-24 2014-12-16 Panasonic Corporation Heating cooker

Also Published As

Publication number Publication date
CN1669360A (zh) 2005-09-14
CN100456897C (zh) 2009-01-28
JPWO2004023846A1 (ja) 2006-01-05
WO2004023846A1 (ja) 2004-03-18
EP1536668A4 (de) 2012-05-16
JP4081086B2 (ja) 2008-04-23
AU2003298883A1 (en) 2004-03-29
HK1080672A1 (en) 2006-04-28
KR20050021457A (ko) 2005-03-07
KR100917726B1 (ko) 2009-09-15
EP1536668B1 (de) 2014-01-08

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