EP2781140A1 - Hochfrequenzlampe sowie verfahren zum betreiben einer hochfrequenzlampe - Google Patents
Hochfrequenzlampe sowie verfahren zum betreiben einer hochfrequenzlampeInfo
- Publication number
- EP2781140A1 EP2781140A1 EP12794674.7A EP12794674A EP2781140A1 EP 2781140 A1 EP2781140 A1 EP 2781140A1 EP 12794674 A EP12794674 A EP 12794674A EP 2781140 A1 EP2781140 A1 EP 2781140A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frequency
- glass bulb
- glass
- frequency signal
- lamp
- 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.)
- Withdrawn
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/048—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by using an excitation coil
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
- H01J65/044—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field the field being produced by a separate microwave unit
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/302—Vessels; Containers characterised by the material of the vessel
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J61/00—Gas-discharge or vapour-discharge lamps
- H01J61/02—Details
- H01J61/30—Vessels; Containers
- H01J61/34—Double-wall vessels or containers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J65/00—Lamps without any electrode inside the vessel; Lamps with at least one main electrode outside the vessel
- H01J65/04—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels
- H01J65/042—Lamps in which a gas filling is excited to luminesce by an external electromagnetic field or by external corpuscular radiation, e.g. for indicating plasma display panels by an external electromagnetic field
-
- 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
- H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
- H05B41/14—Circuit arrangements
- H05B41/24—Circuit arrangements in which the lamp is fed by high frequency ac, or with separate oscillator frequency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
Definitions
- the invention relates to a high frequency lamp according to claim 1, a method for operating a high frequency lamp according to claim 9 and a use of glass according to claim 13 and a use of a high frequency signal according to claim 14.
- lamps should emit light as efficiently as possible with the best possible color spectrum. Each lamp converts energy into light with more or less good efficiency. Often, a lot of heat is lost during conversion. As a rule, the emitted light spectrum and its emission behavior are decisive over the intended use. Fluorescent lamps or gas discharge lamps are known from the prior art.
- Gas discharge lamps are light sources which use a gas discharge and thereby the spontaneous emission by atomic or molecular electronic
- the gas contained in the quartz glass bulb is generally a mixture of metal vapors (eg mercury) and noble gases (eg argon) and possibly other gases as well as halogens.
- Gas discharge lamps are divided into the two classes of low and high pressure discharge lamps. The former uses a glow discharge and the latter uses an arc discharge.
- Ballast (CCG) of a fluorescent lamp contains a choke and a bimetallic contact as a starter circuit.
- the choke, the start is used as a series resistor for the fluorescent tube (often called ionization chamber here).
- This simple circuit is designed for operation at 50 Hz.
- ECGs Electronic ballasts
- U. a. reduces the size and improves the efficiency.
- An ECG consists z. B. off a bridge rectifier, a control electronics, an inverter with two power transistors and a resonant circuit.
- the two transistors of the inverter are operated with opening times of around 45%, so that a short-circuit current can never flow to ground. These 45% times require special control electronics.
- the switching times of the inverter are in the kHz range.
- a special form of the gas discharge lamp is the sulfur lamp. It consists of a quartz glass ball filled with sulfur and argon. In the glass ball, a plasma is generated by high-frequency radiation.
- the ballast incorporates a magnetron that has lower durability than other lamp ballast techniques because of the finite life of the heavily heated cathode.
- the sulfur lamp stands out from the rest of the gas discharge lamps in that it has a very high color temperature and thus has an almost white light spectrum.
- the technique for this lamp is very expensive and therefore expensive.
- it is only available as a high wattage kW kW power lamp.
- HF lamps which are often operated at 2.45 GHz. These lamps work with small high-frequency powers (30-200 W) and use instead of the waveguide coupling a coupling via a trans-electromagnetic line (coaxial line) with
- these lamps are more appropriately referred to as RF antenna lamps.
- RF antenna lamps In these lamps as well as in sulfur lamps, the requirements for frequency stability of the HF generator are low.
- the HF antenna lamps can be ignited without a circuit, they require a lot of power (over 30 W)
- Microwave power Furthermore, both concepts use conventional gas discharge lamps in the form of antennas. This has the serious disadvantage in practice that high-frequency radiation is emitted to a greater extent. Significantly greater plasma efficiencies and thus light efficiencies (measured in lumens per watt) are achieved with RF lamps that have highly effective impedance transformers. By means of these transformers, the voltage in the coupling is transformed upwards and thus the ionization is achieved at lower electrical powers.
- HF lamp is known for example from DE 10 2007 057 581 AI.
- HF lamps can be designed as a microplasma lamp.
- the plasma is often generated at 2.45 GHz. It forms in the often selected unbalanced feed as a ball around the feed electrode.
- the connection to ground is purely capacitive.
- an ionized gas has the same number of electrons and ions, then it is a gas that is space-charge-free and called plasma.
- ⁇ frequency of the high-frequency signal.
- Equation (2) shows that the (small) resistance and thus the losses increase with increasing frequency. Consequently, at higher frequencies, the gases can be heated better.
- Hydrogen or oxygen is attenuated.
- Tesla transformers can be used to produce 100W generators with 5 kV output voltage and thus generate 10 cm long spark gaps in air.
- the inventor has already produced 1 cm long micro-plasma regions at 2.45 GHz by means of a 10 W transmitter and a voltage of 2 kV.
- DE 10 2007 057 581 A1 describes a high-frequency lamp with an ionization chamber and a first electrode which enter the ionization chamber protrudes.
- the ionization chamber contains a gas that is capable of being excited to glow.
- the electrode transmits an electrical signal to the gas in the ionization chamber to produce a plasma in the ionization chamber.
- control electronics for generating the electrical signal is connected.
- this control electronics is a Hochfrequenzoszilator, at the output of a power amplifier is arranged to increase the power of the high frequency signal.
- the power amplifier is followed by an impedance transformer, at the output of the electrode is located, via which the electrical signal is transmitted to the gas.
- the glass bulb of the high-frequency lamp according to DE 10 2007 057 581 A1 is made of quartz glass, as in classical gas discharge lamps. Within this quartz glass bulb is a metal vapor mixture. The composition of the gas metal vapor mixture is not further specified; In principle, however, mercury is used, which is also used as standard in classic gas discharge lamps. Mercury already evaporates at
- Color rendering index which is important for a faithful reproduction of colors.
- classical gas discharge lamps in particular low-pressure discharge lamps
- line emitters which do not emit a continuous spectrum.
- Heating up the glass bulb of the high-frequency lamp in which the metal salt is located is a heating of the glass bulb with heat radiation.
- such heating is
- the transfer to the gaseous state is in any case absolutely necessary for the operation of a high-frequency lamp, because, only if the
- the invention has for its object to provide a high-frequency lamp and a method for operating a high-frequency lamp, which lead to relatively low pollution for the environment and in particular can be manufactured or operated with little effort.
- a high-frequency lamp comprising at least one glass bulb and at least one high-frequency signal supply device for supplying a high-frequency signal to a
- said glass bulb contains an ionizable by the high frequency signal in the gaseous state substance and consists at least in sections of a glass Tanoé on average a loss factor of at least 2xl0 "4 , preferably at least 5xl0 "4, more preferably at least 20 x 10" 4, even more preferably at least 50 x 10 "4, measured at a reference temperature of 20 ° C and a
- Reference signal of 1 M Hz has. Furthermore, a transparent housing, in particular a second, outer glass bulb (or outer bulb) is provided, in which the first glass bulb is arranged.
- a core idea of the invention is to use for the glass bulb not the quartz glass used in the prior art with a loss factor tanö of (about) 1 x 10 "4 , but a glass with a larger loss factor of at least 2 x 10 " 4 .
- This allows the glass bulb by the high-frequency signal to a temperature, for example of at least 40 ° C, in particular of at least 120 ° C, preferably of at least 150 ° C, more preferably of at least 200 ° C, are heated in the metal salts, for.
- sodium salts or lithium iodide begin to evaporate, which is crucial for the operation of the lamp.
- the reason for the heating of the glass is the frequency and the loss factor tanö of the dielectric, in this case glass. The higher the frequency and the larger the loss factor, the more electrical energy is converted into heat in the glass. This phenomenon can be observed in microwave ovens where glass is comparatively even through the glass
- the heating process can be further improved, in particular since a thermal insulation is provided. As a result, the efficiency during operation of the high-frequency lamp can be further increased.
- the power of the high-frequency signal may be, for example, in the range of 0.1 W to 100 W, in particular 5 W to 80 W, preferably 10 W to 30 W.
- a surface of the glass bulb may preferably be 4 cm 2 to 200 cm 2 , more preferably 10 cm 2 to 100 cm 2 .
- Glass bulb may be, for example, 0.1 mm to 2.0 mm, preferably 0.2 mm to 5.0 mm.
- the substance may comprise at least one metal and / or at least one halide and / or at least one noble gas, in particular consist of a metal-halogen-noble gas mixture.
- glass may also include special ceramics or quartz glasses with a correspondingly high loss angle (for example produced by impurities).
- High-frequency signal generating device and a glass bulb wherein the producible power and frequency of the glass flask to be supplied high-frequency signal and the structural design of the glass bulb,
- Loss factor of tanö lxlO "4 are used.
- the high-frequency signal is not only used for ionization and excitation of the gas in the glass bulb, but also for heating the wall of the glass bulb to the required temperature of at least 40 ° C.
- the use of mercury is not mandatory. This also reduces the risk to the environment and humans. In this context, it was also deliberately contrary to the trend in the art, where quartz glass in the field of
- the average predetermined loss factor is less than Tanoé lOOxlO "4, more preferably less than 80xl0" 4, still more preferably less than 60xl0 "4, still more preferably less than or equal to 50xl0" 4.
- the loss factor tanö of the glass of the glass bulb can be at least partially constant and / or with increasing distance from the
- High-frequency signal supply device in particular at least
- a thickness of the glass of the glass bulb may be constant or increase with increasing distance from the high-frequency signal supply device, in particular at least in sections continuously and / or in discrete steps. With a constant training, the production cost is reduced. In a training with varying thickness and / or a
- the temperature of the glass bulb in regions further away from the high-frequency signal supply device is allowed to have a similar or (approximately) equal amount as within regions in the vicinity of the high-frequency signal supply device Near or within the contact area.
- a temperature gradient can be reduced or even set to zero.
- an increase in the loss factor and / or the thickness can be linear.
- the loss factor and / or thickness of the glass may be at least 1.5 times, more preferably at least 2 times, more preferably at least 3 times as large as at one point, at a point farthest from the radio frequency signal supply means, which is closest to the high-frequency signal supply device, in particular within the
- the loss factor tanö of the glass of the glass bulb decreases with increasing distance from the high-frequency signal supply device, in particular at least in sections continuously and / or in discrete steps. Furthermore, a thickness of the glass of the glass bulb with increasing distance from the high-frequency supply device, in particular at least partially continuously and / or in discrete steps, decrease. A decrease in the loss factor and / or the thickness can be linear in particular.
- the loss factor and / or the thickness of the glass at a point farthest from the high-frequency signal supply means may be at most 0.8 times, preferably at most 0.5 times be large as at a point closest to the radio frequency signal supply means, especially within the contact area.
- tan ⁇ 5 tan (90 ° -
- At least two, in particular two, high-frequency signal supply devices are provided which are designed to supply a high-frequency signal of preferably 10 MHz to 100 GHz to at least one contact region of the glass bulb, and are preferably arranged opposite one another such that the glass bulb ( essentially) midway between the high frequency signal supply means.
- the high-frequency signal coupling can be simplified.
- this measure also achieves temperature uniformity (at least approximately). Overall, the efficiency of the high-frequency lamp is further improved.
- a gap is provided between the transparent housing, in particular in the second, outer glass bulb, and the first glass bulb.
- the glass bulb is at least partially, in particular coated within an outside of the contact area outside area with an electrically conductive layer, in particular (thin) metal layer, in particular vapor-deposited.
- an electrically conductive layer in particular (thin) metal layer, in particular vapor-deposited.
- a metal layer metal layer is exemplified below for an electrically conductive layer
- a Layer thickness of in particular 10 nm to 1 ⁇ , preferably 20 nm to 200 nm are understood.
- the metal layer should be so thin that the glass bulb is still optically transparent.
- the thin and optically transparent metal layer ensures that an increased field strength is established at a predetermined distance from the contact region in which the high-frequency signal is supplied, and thus the glass bulb is heated comparatively uniformly. As a result, a temperature gradient can be reduced, which also reduces the risk of possible damage. In general, this exception increases the efficiency of the high frequency lamp.
- the thin metal layer ensures a shield of the glass bulb. An unwanted radiation of the high-frequency signal is attenuated.
- the (thin) conductive layer (metal layer) thus serves both for shielding and for heating the high-frequency lamp. As a result, two functions can be accommodated by a structural measure, which further reduces the manufacturing costs in a synergistic manner.
- a monofrequency or modulated and / or pulsed frequency can be supplied via the high-frequency signal supply device.
- Radio frequency signal of the predetermined frequency can be provided.
- the glass bulb can be heated particularly efficiently.
- a possibly provided high-frequency amplifier could be optimized for a corresponding operation, so that during the starting phase of the high-frequency lamp additional heating of the glass bulb takes place due to the higher losses at the higher frequency.
- Another advantageous aspect of exploiting the third harmonic is the easier ionization of the gases. As the frequency increases, it has been proven that less energy is needed to ionize the metal salts, which in turn means a reduction in the energy required, which generally improves the efficiency of the high frequency lamp.
- the abovementioned object is achieved independently by a method for operating a high-frequency lamp, in particular of the type described above, wherein a glass bulb is provided in such a way and a high-frequency signal with at least one predetermined frequency and power is generated and supplied to the glass bulb such that the glass bulb opens heated to a predetermined temperature, wherein one in the gaseous state through the High frequency signal ionizable substance, in particular an ionizable salt, is evaporated from an inner wall of the glass bulb.
- a method for operating a high-frequency lamp in particular of the type described above, wherein a glass bulb is provided in such a way and a high-frequency signal with at least one predetermined frequency and power is generated and supplied to the glass bulb such that the glass bulb opens heated to a predetermined temperature, wherein one in the gaseous state through the High frequency signal ionizable substance, in particular an ionizable salt, is evaporated from an inner wall of the glass bulb.
- High frequency signal can be used for both the ionization of the phosphor and the heating of the glass bulb.
- a third harmonic of the fundamental frequency is generated and supplied.
- the starting phase may, for example, last at least 5 seconds, in particular at least 20 seconds and / or at most 200 seconds, in particular 100 seconds.
- the predetermined temperature is at least 40 ° C
- the glass bulb is provided in such a way and
- High frequency signal having at least a predetermined frequency and power generated and supplied such that the predetermined temperature in
- the above object is independently achieved by the use of glass having a loss factor of at least Tanoé 2xl0 "4; preferably at least 5xl0"4; more preferably at least 20xl0 "4; still more preferably at least 50xl0" 4 for the production of a glass bulb of a
- High-frequency lamp in particular of the type described above, preferably for carrying out the method of the type described above.
- High frequency lamp directed is further achieved independently by the use of a high frequency signal of preferably 100 M Hz to 1000 GHz, for
- Heating a lamp bulb of a high-frequency lamp in particular of the type described above, preferably for carrying out the method of the type described, in particular to at least 40 ° C, preferably at least 120 ° C, even more preferably at least 150 ° C.
- the high frequency signal preferably has a frequency of 10 MHz to 100 GHz, in particular 300 MHz to 50 GHz, more preferably from 800 M Hz to 10 GHz, even more preferably about 2 GHz to 3 GHz, even more preferably (about) 2.45 GHz ,
- FIG. 1 shows a glass flask according to the invention with a high-frequency signal
- FIG. 2 shows a schematic representation of a second embodiment of a glass bulb according to the invention with a high-frequency signal supply device
- Fig. 3 shows a schematic representation of a third embodiment of a glass bulb according to the invention with two high-frequency signal supply devices
- Fig. 4 is a schematic representation of a fourth embodiment of a
- Fig. 5 is a schematic representation of a fifth embodiment of a
- Fig. 1 shows a glass bulb 10 and a preferably shielded
- Waveguide 11 of a high frequency lamp comprises a preferably coaxial outer conductor 12 and an inner conductor 13 which is preferably round in cross-section.
- the waveguide 11 may be formed such that an impedance transformation, in particular according to DE 10 2007 057 581 A1, is made possible.
- the high frequency signal is the glass bulb 10 in a
- Contact area 14 in which the waveguide 11 is in contact with the glass bulb 10 is supplied. It can be an electrode, preferably a metal electrode
- the glass bulb (not shown in the figures).
- the thickness of the glass bulb 10 is constant (but may vary, notwithstanding the figures).
- the use of a single type of glass allows a comparatively inexpensive production.
- the waveguide 11, which is a high-frequency signal supply means, is a
- High frequency heating realized which may be coupled with the control for ionization of the salts in the interior of the glass bulb 10 to the operation of the
- an impedance transformation can be used for the ionization of the gas.
- Heating the glass wall can be used.
- the waveguide 11 supplies the preferably previously transformed high-frequency signal to the combustion chamber.
- the glass bulb 10 can preferably be fastened to the waveguide 11 via a connection point 15 which is in particular thermally insulating.
- the high-frequency signal can be supplied via a capacitive coupling to the glass bulb 10 or a (gas-filled) combustion chamber 16 within the glass bulb 10.
- the glass bulb is heated at a coupling point 17 the strongest.
- the glass bulb is heated at a coupling point 17 the strongest.
- the glass bulb is heated at a coupling point 17 the strongest.
- Glass bulb 10 reaches a temperature of at least 80 ° C, in particular at least 40 ° C. However, it should be avoided that too large
- the supply of the high-frequency signal in Fig. 2 is carried out in the same manner as in Fig. 1.
- the glass bulb 10 in Fig. 2 is deviating from Fig. 1 is formed.
- the glass bulb 10 is here divided into a first glass bulb section 21, a second glass bulb section 22, a third glass bulb section 23 and a fourth glass bulb section 24.
- the first glass piston portion 21 which is located in the contact region 14 and the region of the high-frequency coupling is made of a high-quality glass with a low loss factor Tanoé, for example, lxlO "4 to l, 5xl0" 4. With increasing distance from the waveguide 11 glasses with larger loss factors are used.
- a loss factor tanö of 1.5x10 "4 to 2x10 " 4 can be formed in the second glass bulb portion.
- the loss factor tanö 2xl0 "4 to 3xl0 " 4 amount.
- the loss factor tanö 3xl0 "4 bis
- the high frequency signal radiates not only on the glass of the glass bulb, but also at the same time in the combustion chamber 16, in which then the heated or
- vaporized gases are ionized and thereby the light emission is initiated.
- the subdivision of the glass bulb into regions with different loss factors can, as in FIG. 2, be carried out discretely, into previously defined regions, but alternatively also can be infinitely variable. Thanks to a stepless design, the wall temperature can be set very precisely, which can, if necessary, achieve a uniform temperature of the wall. However, even in the discrete embodiment, a relatively uniform Temperature distribution can be achieved. Thus, it can be prevented that a portion of the high-frequency lamp has too low a temperature and the lamp can not be put into operation. On the other hand, it can be prevented that the glass bulb is too hot locally and too strong
- any problems that may occur can be reduced or avoided by locally increasing the temperature in the vicinity of the high-frequency coupling.
- the temperature depends on the distance to the area of the coupling.
- the "cold spot" (coldest point of the glass bulb) can thereby be decisive for the operation of a
- High-frequency lamp and is expected, for example, when using a spherical glass bulb 10 with respect to the coupling (in one-sided coupling). With two - sided coupling (which in one-sided coupling). With two - sided coupling (which in one-sided coupling).
- FIG. 3 an embodiment of the high-frequency lamp is shown in fragmentary form, in which in addition to the glass bulb 10 and the first waveguide 11, a second waveguide 31 corresponding to the first waveguide 11th
- the waveguides 11, 31 can be controlled (also in the other embodiments) with differential technology to produce a local maximum of the field strength in the center of the combustion chamber 16 and at the same time heat the glass bulb on both sides.
- the glass bulb 10 is also formed inhomogeneous in the starting example according to FIG. 3 and comprises a first glass bulb section 41, a second glass bulb section 42, a third glass bulb section 43, a fourth glass bulb section 44 and a fifth glass bulb section 45, preferably the first glass bulb section 41 and the fifth
- Glass piston portion 45 are made of a same material and even more preferably the second glass piston portion 42 and the fourth
- Glass piston portion 44 also consist of a same material.
- the first The glass bulb section 41 is located in the contact region 14 of the first waveguide 11.
- the fifth glass bulb section is located in the contact region 14 of the second waveguide 31.
- the first glass bulb section 41 and the fifth glass bulb section 45 are made of a material having a comparatively low loss factor tanö.
- the second glass bulb portion 42 and the fourth glass bulb portion 44 immediately adjacent to the respective contact regions 14 are made of a material having a higher dissipation factor tan0.
- Contact area 42 and the fourth contact area 44 is, has an even higher loss factor tanö.
- Fig. 4 shows a section of a high-frequency lamp, wherein the first
- Glass bulb 10 is provided within a second glass bulb 50.
- Interspace 51 between the second glass bulb 50 and the first glass bulb 10 is preferably evacuated or evacuated. As a result, the heating process can be additionally supported, resulting in economic operation of the
- the second glass bulb 50 is replaced by a
- the second glass bulb 50 may be satin or clear.
- the high-frequency signal can be supplied analogously to FIGS. 1 and 2 via the waveguide 11 or its outer conductor 12 and inner conductor 13 to the first glass bulb 10.
- the first glass bulb 10 according to FIG. 4 consists of a first glass bulb section 53, a second one
- Glass bulb portion 55 is disposed opposite to the first glass bulb portion 53, which in turn is disposed in the contact region 14.
- the second glass bulb portion 54 is disposed between the first glass bulb portion 53 and the third glass bulb portion 55.
- the evacuated gap 51 ensures a thermal insulation of the first glass bulb 10. Die
- Embodiment according to FIG. 4 is also expandable to a two-sided control, as shown in FIG. 3.
- FIG. 5 essentially corresponds to FIG
- the (thin) metal layer 57 is vapor-deposited.
- the (thin) metal layer 57 may preferably be electrically connected to the outer conductor 12 of the waveguide 11 wherein the outer conductor 12 is further preferably connected to ground (which may also be the case in the other embodiments)
- the (thin and optically transparent) metal layer 57 enables an increased field strength to be established at a certain distance from the contact region 14
- this (thin) metal layer 57 enables a shielding of the lamp, thereby attenuating radiation of the high-frequency signal.
- the losses and thus also the heating of the glass bulb depend on the loss factor tanö of the glass and on the frequency.
- the third harmonic is another way to influence the temperature increase of the glass bulb.
- An intended high-frequency amplifier could be optimized for a corresponding operation, so that during a start phase of the high-frequency lamp, an additional heating of the
- Glass bulb 10 can take place, due to the then higher losses at the higher frequency.
- Another advantage of using the third harmonic is easier ionization of the gases. With increasing frequency, less energy must be expended to ionize the metal side, which in turn means a reduction in the energy required.
- High frequency radiation takes place and the lamp is eligible. Furthermore, the efficiency can be improved.
- Glass bulb is relatively high impedance, which are given by adaptation very large electric field strengths at low power.
- the heating of the glass bulb of the high frequency lamp is realized by one or two-sided irradiation of a microwave.
- the temperature gradients on the wall of the glass bulb can be minimized, so that the temperature of the entire wall of the glass bulb is relatively homogeneously distributed.
- the high frequency lamp can be used to build microwave driven
- the high-frequency lamp is particularly well suited for use in private households as a light source due to its many-line spectrum.
- the microwave-driven high-frequency lamp can be by means of
- Telecommunications market are relatively inexpensive available, and conventional gas discharge lamp technology manufactured very inexpensive, especially since the high voltage requirements are significantly lower compared to classic starter circuits.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Circuit Arrangements For Discharge Lamps (AREA)
- Discharge Lamps And Accessories Thereof (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011055486A DE102011055486A1 (de) | 2011-11-18 | 2011-11-18 | Hochfrequenzlampe sowie Verfahren zum Betreiben einer Hochfrequenzlampe |
PCT/EP2012/072888 WO2013072483A1 (de) | 2011-11-18 | 2012-11-16 | Hochfrequenzlampe sowie verfahren zum betreiben einer hochfrequenzlampe |
Publications (1)
Publication Number | Publication Date |
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EP2781140A1 true EP2781140A1 (de) | 2014-09-24 |
Family
ID=47278267
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP12794674.7A Withdrawn EP2781140A1 (de) | 2011-11-18 | 2012-11-16 | Hochfrequenzlampe sowie verfahren zum betreiben einer hochfrequenzlampe |
Country Status (6)
Country | Link |
---|---|
US (1) | US20140306602A1 (de) |
EP (1) | EP2781140A1 (de) |
CN (1) | CN103947297A (de) |
DE (1) | DE102011055486A1 (de) |
TW (1) | TW201327623A (de) |
WO (1) | WO2013072483A1 (de) |
Family Cites Families (8)
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US4070603A (en) * | 1976-07-14 | 1978-01-24 | Gte Laboratories Incorporated | Solid state microwave power source for use in an electrodeless light source |
DE69706453T2 (de) * | 1996-02-01 | 2002-06-06 | Osram Sylvania Inc., Danvers | Elektrodenlose Hochleistungsentladungslampe mit einer Borsulfid enthaltende Füllung |
JP2000311659A (ja) * | 1999-04-27 | 2000-11-07 | Harison Electric Co Ltd | 外面電極蛍光ランプ |
CN1350698A (zh) * | 1999-05-12 | 2002-05-22 | 熔化照明股份有限公司 | 高亮度微波灯 |
TW200512167A (en) * | 2003-08-08 | 2005-04-01 | Nippon Electric Glass Co | Outer sleeve for external electrode fluorescent lamp |
DE102007057581A1 (de) | 2007-11-28 | 2009-06-04 | Fachhochschule Aachen | Hochfrequenzlampe und Verfahren zu deren Betrieb |
DE102009022755A1 (de) * | 2009-05-26 | 2010-12-02 | Fachhochschule Aachen | Hochfrequenzlampe über Impedanztransformation |
WO2010140691A1 (ja) * | 2009-06-04 | 2010-12-09 | 国立大学法人静岡大学 | 放電灯及び放電灯装置 |
-
2011
- 2011-11-18 DE DE102011055486A patent/DE102011055486A1/de not_active Withdrawn
-
2012
- 2012-10-25 TW TW101139443A patent/TW201327623A/zh unknown
- 2012-11-16 US US14/357,802 patent/US20140306602A1/en not_active Abandoned
- 2012-11-16 EP EP12794674.7A patent/EP2781140A1/de not_active Withdrawn
- 2012-11-16 CN CN201280056428.7A patent/CN103947297A/zh active Pending
- 2012-11-16 WO PCT/EP2012/072888 patent/WO2013072483A1/de active Application Filing
Non-Patent Citations (1)
Title |
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See references of WO2013072483A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE102011055486A1 (de) | 2013-05-23 |
TW201327623A (zh) | 2013-07-01 |
WO2013072483A1 (de) | 2013-05-23 |
US20140306602A1 (en) | 2014-10-16 |
CN103947297A (zh) | 2014-07-23 |
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