200926897 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種照明系統，其具有一種由電子式鎭流 器和DBD-燈所構成的組合，所謂DBD-燈是指一種介電質阻 障式放電燈（DBD: Dielectric Barrier Discharge)。 【先前技術】 針對介電質阻障式放電而設置的燈（以下簡稱爲DBD-燈）自數年以來即廣泛地被開發及使用。此種燈例如涉及格 式較大、很平坦的燈（以下稱爲平面式輻射器），大致上是用 於監視器之背光照明；或此種燈亦可爲線形的DBD-燈。除 了傳統的燈藉由發光材料以產生可見光以外，DBD·燈以各 種不同的造型而用作紫外線（UV)-燈，例如，其可在塑料硬 化或辨公室自動化之類的技術過程中用來殺菌。 基本上此種DBD -燈以電子式鎭流器（Ballast)來控制及 操作，此乃因只有這樣才可產生所需的點燃電壓和操作電 壓。因此’以數個10 kHz之較高的頻率來將短的功率載入 脈波予以輸入，這些功率載入脈波將在D B D -燈中引起個別 的放電過程。個別的放電過程藉由介電層之充電所造成之 內部的相反極化而終止，其中個別的放電過程藉由無放電 的中間相位而相隔開。 已使用各種不同拓樸（topology)形式的轉換器以作爲適 當的鎭流器，特別是可使用E類型（Class E)轉換器以及具有 相連接的變壓器之通量（flux)轉換器。此種鎭流器原則上已 200926897 滿足對鎭流器本身所設定的需求，但較昂貴且就其效率而 言仍有改進的可能。在設計此種鎭流器時，特別是須考慮 DBD-燈之大電容的特性。 EP 1 7 5 3 27 2 A2顯示一種已針對先前技術而改進的轉 換器拓樸形式，其是由開關電晶體所構成的具有充電電容 的半橋式和全橋式電路，但不具備變壓器。因此，鎭流器 已大大地簡化且可達成較佳的效率。 【發明內容】 本發明的目的是以技術問題作爲基準，其用來改良先 前技術。 本發明涉及一種照明系統，其包括電子式鎭流器和 DBD-燈，其中電子式鎭流器包括：方波轉換器，其藉由二 個轉換器輸入電位之間的交換式切換而將一轉換器輸出電 位發送至燈終端，其中該轉換器具有：至少二個開關電晶 體，以進行交換式切換，且各開關電晶體之終端在電性上 與燈終端之一極相連接；以及一與燈相串聯的充電電感， 其位於燈終端之一極和一開關電晶體之一終端之間，此電 子式鎭流器之特徵在於，各開關電晶體在斷開狀態時由多 個二極體以單方向跨接著，使各二極體分別處於一施加至 該開關電晶體之轉換器輸入電位和轉換器輸出電位之間， 且該照明系統由於一相較於該燈已足夠小的充電電感値而 受到衰減，以便在已點燈的操作期間第一電流超越量 (overshoot)的尖峰値在主電流尖峰之後最多只爲主尖峰之 200926897 三分之一。 該照明系統之較佳的配置方式描述在申請專利範圍各 附屬項中。 如上所述，DBD -燈亦可用來產生不可見的光，特別是 紫外光。因此，此槪念”照明系統’’亦表示一種”紫外線-照 明”。此槪念因此渉及電子式鎭流器和DBD -燈之可操作的組 合。 本發明的基本槪念在於，可節省先前技術EP 1 7 53 272 A2中已爲人所知的與開關電晶體串聯之二極體，該處稱爲 電流閥。取而代之的是，各開關電晶體在斷開的狀態下在 一方向中被跨接著，且明確而言，這是藉由另一並聯的二 極體或藉由原來是電晶體的二極體（FETs之主體二極體）來 跨接著。此種跨接實際上無需電流閥而是設置在相對應的 轉換器槽（r a st)中，這些跨接用的二極體應處於轉換器輸入 電位和轉換器輸出電位之間。本發明因此未包括上述先前 Q 技術中FETs之組件，此乃因該處的主體二極體所跨接的開 關電晶體不是位於轉換器輸入電位和轉換器輸出電位之 間，這是由於個別的電流閥所造成。 電流閥之在先前技術中所設置的功能是用來防止由充 電電感和電容性的電燈所形成的振盪電路的能量之過大的 反向振盪。依據本發明，此功能以較小的充電電感値來實 現。於是，振盪電路之相對應的衰減和能量之反向振盪之 受限都可在轉換器槽中達成。在量的方面須進行測量，使 200926897 燈電流之電流/時間圖中在第一主電流尖峰之後的第一超越 量的尖峰値具有反向的極性且最多等於第一主電流尖峰値 之振幅之三分之一。電流尖峰値之比値較佳是小於1:4。 於是，由振盪衰減用的燈電流直至下一次放電點燈爲止所 定義的電流大小應作爲參考値。 DBD-燈之等效電路可以較簡單的方式而表示成並聯電 路，其由第一電容和歐姆電阻所構成的串聯電路、以及第 二電容所構成。第二電容描述該燈在未點燃的狀態下的電 容特性。 此電容特性在點燃時和點燃之後被強化，此乃因在放 電空間中會產生自由的電荷載體。因it，當該燈被點燃時， 第一電容可有效地與該歐姆電阻串聯。第一電容基本上是 放電用的電漿之電容。 該歐姆電阻會隨時間而變化，即，在點燈之前實際上 該歐姆電阻是無限的，在點燈過程中大大地下降。在放電 現象減輕之後，該電阻又上升。在特定的放電過程期間， 該電阻由等效電路中一種不隨時間而變的電阻開始。然 而，爲了更易了解，一種具有古典式定値的歐姆電阻之等 效電路在該特定的放電過程期間有助於了解。 在說明一實施例時，由一已簡化的電路圖開始，振盪 的衰減値隨著充電電感之値的增加而下降且亦隨著該燈電 容-和等效的歐姆電阻値下降而下降。在所設定的一種燈 中，藉由足夠小的充電電容可確保較大的衰減。 200926897 此處須指出，由於該燈之先前稱爲第二電容之電容上 的作用，則在未點燈的狀態下在點燈之前亦已存在著一種 LC-振盪電路。當然，在DBD-燈中第一電容較第二電容大很 多，以便在點燈狀態下使一由該等效電路圖之在歐姆電阻 中的歐姆損耗所衰減的LC-振盪電路之已簡化的電路圖可 描述實際情況的主要部份。 該充電電容當然可像上述的先前技術一樣由多於一個 個別的構件所構成。目前的描述是與電感値之和（sum)有 關。此外，該充電電感形成一變壓器之替代物，本發明中 應省略此變壓器。相對應地，在各開關電晶體之終端和該 轉換器之燈終端之一極之間存在一種電性連接。 有利的方式是，由於對稱的原因而將該充電電感劃分 成多個構件。特別可劃分成二個在該燈之二側上對稱的充 電電感。 因此，本發明的優點在於，可省略作爲構件用的電流 閥二極體。此外，可藉由省略此種二極體而允許一種反向 振盪。這與稍後才點燈或未點燈有關。在上述的先前技術 中，藉由電流閥的截止作用，則由轉換器而泵送至振盪電 路中的能量可持續地振盪且理論上特別是可無限地使燈電 壓提高。當該燈未即時點燈時，則會造成有問題的過（over) 電壓。 本發明中，上述特性所造成的危險性很小，此乃因電 流閥並無整流作用。於是’該轉換器可藉由共振過（over)電 200926897 壓而在振盪電路中激發較高的電壓，但此種電壓不會無限 制地使電壓上升，此乃因能量亦會流回。另一方面，藉由 足夠的衰減可在正常操作時防止能量發生太強的反向振 盪，因此可確保一種很好的效率。 在先前技術中提及電晶體半橋式電路和全橋式電路。 在本發明中，電晶體全橋式電路亦形成本發明的轉換器之 特別有利的實施形式。另一有利的實施形式是多位準反向 器，特別是”串接式單元（Cascaded-Cell)型’’。 作爲所考慮的轉換器之基本槪念，此處使用”方波轉換 器”之槪念，其當然亦包括半橋式電路，即，包括全部的此 種轉^器：其藉由交換式地切換各開關電晶體而產生一種 近似方波的轉換器輸出電位値，各開關電晶體具有連接至 電源電位的切換的終端。所謂切換的終端此處另外是指電 晶體之所連接的區段的一終端，其大致上是指FET之一源 極端或汲極端，或雙載子電晶體之射極端或集極端。 因此’較佳是只應採用該轉換器輸出電位値之極端 値’即，無中間步階，這特別是與串接式單元-多位準反相 器有關，其亦以轉換器輸出電位値之中間步階來操作。（當 然，此處可在一固定且時間上定値的轉換器輸出電位値之 已簡化的電路圖中說明理由，這當然只針對定性的特性。） 雖然不需變壓器，但由於LC-共振電路之激發而相對於 電源電位之間的電壓形成過高的共振，則可很容易地保持 一種高很多的燈電壓，然而’可藉由一變壓器來達成大的 -10- 200926897 電壓轉移。因此，在與設有變壓器的轉換器相比較下，本 發明的電路的轉換器在情況需要時需要較高的電源電壓。 此電源電壓較佳是用在一種中間電路中，其中該中間 電路電壓是藉由功率因數修正電路來產生。特別是可考慮 一種高壓設定器。因此，能以簡易的方式產生一種lkV大 小的中間電路電壓，使其不取決於一種高的變壓比。轉換 器輸入電位特別是大於0.6kV，較佳是大於0.7kV或0.8kV。 然而，較高的中間電路電壓所需的耗費可藉由很簡單 〇 的轉換器拓樸而合理化。特別是省略變壓器時所表示的意 義是：當希望時亦能以很低的操作頻率來接近該燈，且在 磁性構件中不會有隔離的問題以及鐵損或銅損。該燈上的 電壓上升速率對該燈之效率很重要，此種電壓上升速率可 藉由適當地選取充電電感來最佳化。此處，變壓器的雜散 電感會造成干擾。成本下降和體積下降因此是有利的。 在上述之先前技術中，依據每一轉換器槽中可支配的 Q 開關電晶體之電壓穩固性，即，依據介於轉換器輸入電位 和轉換器輸出電位之間的電壓穩固性，多個電晶體亦可互 相串聯。這亦適用於本發明。當然，每一轉換器槽中的拓 樸形式較佳是分別只具有一個開關電晶體。 此外，亦可省略其它像點燃電極之類的點燃輔助器， 且燈電壓之由於LC-振盪電路所造成的可能的共振過高現 象亦可避免。 又，本發明可特別有利地用在平面式輻射器中，即， -11- 200926897 可用在具有較大電容之較大的燈中。 以下將描述一實施例來說明本發明，個別的特徵 合亦可以是發明。須預先注意的是’目前以及隨後所 的內容亦隱含一種DBD-燈、一鎭流器以及一由其所構 照明系統的操作方法。 【實施方式】 第1圖顯示一種習知的作爲功率因數修正電路用 壓設定器以用來產生一中間電路電壓，第1圖左方以 來表示直流電壓源。此中間電路電壓以直流電壓源來 且大小大約是〇.9k V，其介於第1圖上方-和下方的水 支之間，其中在此二個分支之間存在一種由四個開關 體S1-S4構成的全橋式電路。於此，開關電晶體S1和 以及S 3和S4分別互相串聯且位於此二個分支之間。： 和S2之間的中間測量點、以及S3和S4之間的中間測 上分別存在著轉換器輸出電壓。 在此二個中間測量點之間連接著一種以參考符號 來表示的介電質阻障式放電燈。於此，此放電燈是一 面式輻射器，其對角線是32吋長且面積大約是〇.28m2 是由位於德國慕尼黑之歐斯朗股份有限公司所提供’ 名稱爲”Planon”。 DBD-燈經由二個分別連接於中間的6/zH之充電 L 1和L2而連接至該二個中間測量點。此二個電感互相 一種有效之12μΗ的總充電電感，但爲了對稱亦可分 的組 揭示 成的 的高 符號 表示 平分 電晶 S2、 生S1 量點 DBD 種平 ，其 商標 電感 形成 配在 -12- 200926897 —個構件上。 第2圖顯示DBD-燈之上述等效電路，其具有第一電容 C1和第二電容C2以及一種會隨著時間而變化的歐姆電阻 R1。此處所使用的燈之等效電路具有一種在未點燈的狀態 下有效的第二電容C2(大約200 pF)以及另一較大的與歐姆 電阻串聯之第一電容C1(大約2200pF)。放電時會有功率損 耗的歐姆電阻R1在放電期間大約是242 Ω，此値會隨著時 間變化’即’隨著放電的減弱而又上升，在個別的放電脈200926897 IX. Description of the Invention: [Technical Field] The present invention relates to an illumination system having a combination of an electronic choke and a DBD-lamp, the so-called DBD-lamp being a dielectric barrier Discharge lamp (DBD: Dielectric Barrier Discharge). [Prior Art] A lamp (hereinafter referred to as a DBD-lamp) provided for a dielectric barrier discharge has been widely developed and used for several years. Such a lamp, for example, relates to a relatively large, very flat lamp (hereinafter referred to as a planar radiator), which is generally used for backlighting of a monitor; or such a lamp may be a linear DBD-lamp. In addition to conventional lamps that use luminescent materials to produce visible light, DBD lamps are used as ultraviolet (UV) lamps in a variety of different shapes, for example, in technical processes such as plastic hardening or office automation. To sterilize. Basically such DBD-lamps are controlled and operated by an electronic choke (Ballast), as this is the only way to produce the required ignition voltage and operating voltage. Therefore, a short power is applied to the pulse wave at a higher frequency of several 10 kHz, and these power loading pulses will cause an individual discharge process in the D B D - lamp. The individual discharge processes are terminated by internal opposite polarizations caused by the charging of the dielectric layer, with individual discharge processes being separated by an intermediate phase without discharge. Converters of various topological forms have been used as suitable chokes, in particular E-type (Class E) converters and flux converters with connected transformers. In principle, such chokes have met 200926897 to meet the requirements set for the choke itself, but are more expensive and there is still room for improvement in terms of efficiency. In designing such a choke, in particular, the characteristics of the large capacitance of the DBD-lamp must be considered. EP 1 7 5 3 27 2 A2 shows a converter topology which has been improved for the prior art, which is a half-bridge and full-bridge circuit with a charging capacitor formed by a switching transistor, but without a transformer. Therefore, the choke has been greatly simplified and a better efficiency can be achieved. SUMMARY OF THE INVENTION The object of the present invention is to use a technical problem as a reference for improving the prior art. The invention relates to an illumination system comprising an electronic choke and a DBD-lamp, wherein the electronic choke comprises: a square wave converter, which is switched by switching between two converter input potentials The converter output potential is sent to the lamp terminal, wherein the converter has: at least two switching transistors for switching, and the terminals of the respective switching transistors are electrically connected to one of the lamp terminals; a charging inductor connected in series with the lamp, located between one pole of the lamp terminal and one terminal of a switching transistor, wherein the electronic choke is characterized in that each switching transistor is separated by a plurality of diodes The body is slid in a single direction such that each of the diodes is between a converter input potential applied to the switching transistor and a converter output potential, and the illumination system is charged sufficiently smaller than the lamp. The inductor is attenuated so that the peak of the first current overshoot during the operation of the lighting is at most one-third of the main peak of 200926897 after the main current spike. A preferred configuration of the illumination system is described in the accompanying claims. As mentioned above, DBD-lamps can also be used to generate invisible light, especially ultraviolet light. Therefore, this commemorative "lighting system" also means a kind of "ultraviolet-illumination". This commemoration therefore combines the operational combination of the electronic choke and the DBD-light. The basic complication of the present invention is that it can save A diode which is known in the prior art in EP 1 7 53 272 A2 in series with a switching transistor, is referred to as a current valve. Instead, each switching transistor is in an open state in one direction. It is taken across, and specifically, this is done by another parallel diode or by a diode that is originally a transistor (the body diode of the FETs). This kind of jump does not actually need The current valves are instead disposed in corresponding converter slots, which should be between the converter input potential and the converter output potential. The present invention therefore does not include the prior Q techniques described above. The components of the FETs, because the switching transistor across the body diode is not located between the converter input potential and the converter output potential due to the individual current valve. The current valve is previously Set in the technology The function is to prevent excessive reverse oscillation of the energy of the oscillating circuit formed by the charging inductor and the capacitive lamp. According to the invention, this function is realized with a smaller charging inductance 。. Thus, the corresponding oscillating circuit The attenuation of the attenuation and the inverse oscillation of the energy can be achieved in the converter slot. In terms of quantity, the first overshoot after the first main current spike in the current/time diagram of the 200926897 lamp current must be measured. The peak 値 has a reverse polarity and is at most equal to one third of the amplitude of the first main current spike 。. The ratio of the current peak 値 is preferably less than 1:4. Thus, the lamp current used for oscillation attenuation continues until The current defined by the discharge of a single discharge should be used as a reference. The equivalent circuit of the DBD-lamp can be represented as a parallel circuit in a relatively simple manner, a series circuit composed of a first capacitor and an ohmic resistor, and a second The second capacitor describes the capacitance characteristics of the lamp in an unignited state. This capacitance characteristic is reinforced during ignition and after ignition, because of the discharge space. A free charge carrier is generated. Because of this, when the lamp is ignited, the first capacitor can be effectively connected in series with the ohmic resistor. The first capacitor is basically the capacitance of the plasma for discharge. The ohmic resistor will be over time. The change, that is, the ohmic resistance is actually infinite before the lighting, and greatly decreases during the lighting process. After the discharge phenomenon is alleviated, the resistance rises again. During the specific discharge process, the resistance is replaced by an equivalent circuit. One of the resistances that does not change with time begins. However, for easier understanding, an equivalent circuit with a classically defined ohmic resistance is helpful during this particular discharge process. In describing an embodiment, At the beginning of the simplified circuit diagram, the attenuation of the oscillations decreases as the charging inductance increases and also decreases as the lamp capacitance - and the equivalent ohmic resistance 値 drop. In a lamp set, a large attenuation can be ensured by a sufficiently small charging capacitor. 200926897 It should be noted here that due to the action of the lamp previously referred to as the capacitance of the second capacitor, an LC-oscillation circuit already exists before the lighting in the unlit state. Of course, the first capacitor in the DBD-lamp is much larger than the second capacitor in order to make a simplified circuit diagram of the LC-oscillation circuit attenuated by the ohmic loss in the ohmic resistor of the equivalent circuit diagram in the lighting state. The main part of the actual situation can be described. The charging capacitor can of course be constructed of more than one individual component as in the prior art described above. The current description is related to the sum of the inductances (sum). Furthermore, the charging inductor forms an alternative to a transformer which should be omitted in the present invention. Correspondingly, there is an electrical connection between the terminals of the respective switching transistors and one of the terminals of the lamp terminals of the converter. Advantageously, the charging inductance is divided into a plurality of components for reasons of symmetry. In particular, it can be divided into two charging inductors that are symmetrical on the two sides of the lamp. Therefore, the present invention is advantageous in that a current valve diode as a member can be omitted. Furthermore, a reverse oscillation can be allowed by omitting such a diode. This is related to lighting or not lighting later. In the above prior art, the energy pumped by the converter to the oscillating circuit oscillates continuously by the cut-off action of the current valve and theoretically, in particular, the lamp voltage can be increased indefinitely. When the lamp is not lit immediately, it will cause a problematic over voltage. In the present invention, the above characteristics are less dangerous, because the current valve has no rectifying action. Thus, the converter can excite a higher voltage in the oscillating circuit by resonating the voltage of 200926897, but this voltage does not increase the voltage indefinitely because the energy also flows back. On the other hand, with sufficient attenuation, it is possible to prevent the reverse oscillation of the energy from being too strong during normal operation, thus ensuring a good efficiency. Transistor half-bridge circuits and full-bridge circuits are mentioned in the prior art. In the present invention, the transistor full bridge circuit also forms a particularly advantageous embodiment of the converter of the invention. A further advantageous embodiment is a multi-level inverter, in particular a "Cascaded-Cell type". As a basic concept of the converter under consideration, a "square wave converter" is used here. The commemoration, of course, also includes a half-bridge circuit, that is, including all such converters: it switches the switching transistors to produce an approximately square wave converter output potential 値, each switch The transistor has a terminal connected to the switching of the power supply potential. The so-called switched terminal here additionally refers to a terminal of the segment to which the transistor is connected, which generally refers to one of the source terminal or the 汲 terminal of the FET, or a double load The emitter or collector terminal of the sub-transistor. Therefore, it is preferable to use only the extreme 値 of the converter output potential 即, that is, without intermediate steps, especially with the series-unit-multi-level inverter Relatedly, it also operates in the middle step of the converter output potential 値. (Of course, the reason can be explained here in a simplified circuit diagram of a fixed and time-varying converter output potential ,, which of course only for qualitative Special Although a transformer is not required, due to the excitation of the LC-resonant circuit, the voltage between the power supply potential forms an excessive resonance, so that a much higher lamp voltage can be easily maintained, however, a transformer can be used. To achieve a large voltage transition of -10 200926897. Therefore, in comparison with a converter provided with a transformer, the converter of the circuit of the present invention requires a higher power supply voltage when needed. This power supply voltage is preferably used. In an intermediate circuit, wherein the intermediate circuit voltage is generated by a power factor correction circuit. In particular, a high voltage setter can be considered. Therefore, an intermediate circuit voltage of lkV size can be generated in a simple manner, so that it does not depend on For a high transformation ratio, the input potential of the converter is especially greater than 0.6kV, preferably greater than 0.7kV or 0.8kV. However, the cost of the higher intermediate circuit voltage can be reduced by a very simple converter. Simple and rational. Especially when the transformer is omitted, the meaning is: when desired, the lamp can be accessed at a very low operating frequency, and in the magnetic member There will be no isolation problems and iron loss or copper loss. The rate of voltage rise on the lamp is important to the efficiency of the lamp. This rate of voltage rise can be optimized by appropriately selecting the charging inductance. The stray inductance of the transformer can cause interference. Cost reduction and volume reduction are therefore advantageous. In the prior art described above, the voltage stability of the Q-switched transistor that is available in each converter slot is determined, ie, The voltage stability between the converter input potential and the converter output potential, and the plurality of transistors can also be connected in series with each other. This is also applicable to the present invention. Of course, the topology in each converter slot preferably has only A switching transistor can also be omitted. Other ignition aids such as ignition electrodes can be omitted, and the possible excessive resonance of the lamp voltage due to the LC-oscillation circuit can be avoided. Moreover, the invention can be used particularly advantageously in planar radiators, i.e., -11-200926897 can be used in larger lamps having larger capacitances. An embodiment will be described below to illustrate the invention, and individual features may also be the invention. It should be noted in advance that the current and subsequent contents also imply a DBD-lamp, a choke, and a method of operation of the illumination system constructed thereby. [Embodiment] Fig. 1 shows a conventional voltage setter for a power factor correction circuit for generating an intermediate circuit voltage, and the DC voltage source is shown on the left in Fig. 1. The intermediate circuit voltage is derived from a DC voltage source and is approximately 〇.9k V, which is between the upper and lower waters of Figure 1, wherein there is a four-switch S1 between the two branches. -S4 consists of a full bridge circuit. Here, the switching transistors S1 and S3 and S4 are respectively connected in series with each other and between the two branches. The converter output voltage exists between the intermediate measurement point between S2 and S2 and the intermediate measurement between S3 and S4. A dielectric barrier discharge lamp, indicated by reference numerals, is connected between the two intermediate measuring points. Here, the discharge lamp is a one-sided radiator having a diagonal of 32 inches and an area of about 28.28 m2 which is provided by the "Oslan" company in Munich, Germany, under the name "Planon". The DBD-lamp is connected to the two intermediate measuring points via two 6/zH chargings L1 and L2 respectively connected to the middle. The two inductors are mutually effective 12μΗ total charging inductance, but the high symbol for the symmetrical group can be expressed as the bisecting crystal S2, the raw S1 measuring point DBD leveling, and the trademark inductance is formed at -12. - 200926897 - on a component. Fig. 2 shows the above equivalent circuit of the DBD-lamp having a first capacitor C1 and a second capacitor C2 and an ohmic resistor R1 which changes with time. The equivalent circuit of the lamp used herein has a second capacitor C2 (about 200 pF) which is effective in the unlit state and a further large capacitor C1 (about 2200 pF) which is connected in series with the ohmic resistor. The ohmic resistor R1 which has a power loss during discharge is approximately 242 Ω during discharge, and this 値 varies with time 'i', as the discharge decreases, and rises again, in individual discharge veins.
D 波之間歐姆電阻R1實際上是無限大且亦與功率有關，藉此 來操作該燈。DBD-燈可在某一範圍內進行調光，其中歐姆 電阻在相同的燈中隨著燈的平均功率之增加而減少。左已 設定的資料中，該燈大約以135W來操作，此時一種例示性 的構造之總功率消耗大約是150W。 在一種以第一電容C1爲主之LC-振盪電路之簡化的圖 中，即’在第二電容C2可忽略時的點燈狀態下，對LC-振 U 盪電路之一種超臨界（over-critical)的衰減而言會有以下的 關係存在： L1+L2 < (R12xC1)/4 此種情況表示：超臨界衰減時的L1和L2之和（sum)應 小於32.2yH，這顯然可滿足上式關係式。然而，此處只是 —種近似的定量測量。事實上第3圖所示的電流-/時間曲線 和電壓-/時間曲線iu"和Vlamp顯示出在個別的主尖峰（第3 圖中以或來表示）之後仍然有輕微的過振盪尖峰， -13- 200926897 其分別具有相反的極性且在振輻比例上就電流而言是主尖 峰之五分之一至六分之一’就電壓而言是五分之一。 第1圖所示的開關電晶體S1-S4是一種IGBTs，如第1 圖所示，反向並聯的二極體D1-D4導通。例如，當使用FET 時，此功能可藉由固有的主體二極體來達成。於是，將造 成第3圖所示的反向振盪，即，在時間圖中顯示出極性相 反的尖峰。第3圖中在50%處的有規律的特性基本上亦可具 有其它値。 〇 相較於先前技術EP 1 75 3 272 A2而言，此處須注意： 該文件中藉由電流閥來達成一種”反向振盪特性的衰減”。 LC-振盪電路之原來的”歐姆”抗流圈在該文件中較輕微。因 此，在該文件的第4圖中在同等級的DBD-燈中總充電電感 設定爲208 # Η。 該ΕΡ-文件中該電流閥之作用另外在段落0018中有說 明。該文件所述的上升的電流値和電壓値是以該文件中的 Q 電流閥二極體之截止作用爲基準。本發明中則不需此種電 流閥’取而代之的是將該充電電感設計成非常小。此種方 式的優點已如上所述。此外，該ΕΡ-文件中的描述當然亦適 用於本發明。 【圖式簡單說明】 第1圖本發明之實施例之一簡化的電路原理圖。 第2圖由第1圖所構成的DBD-燈的等效電路圖。 第3圖由第1圖所構成的電路之電流-/時間曲線及電 -14- 200926897 壓-/時間曲線。 【主要元件符號說明】 S 1 -S4 開關電晶體 D 1-D4 二極體 LI -L2 充電電感 DBD D B D -燈 Cl , C2 電容 R1 歐姆電阻 ❹The ohmic resistance R1 between the D waves is actually infinite and also related to power, thereby operating the lamp. The DBD-lamp can be dimmed over a range where the ohmic resistance decreases as the average power of the lamp increases in the same lamp. In the data set to the left, the lamp operates at approximately 135 W, at which time the total power consumption of an exemplary configuration is approximately 150 W. In a simplified diagram of an LC-oscillation circuit based on a first capacitor C1, that is, in a lighting state in which the second capacitor C2 is negligible, a supercriticality of the LC-oscillation circuit (over- In the case of the attenuation of critical), the following relationship exists: L1+L2 < (R12xC1)/4 This case means that the sum (sum) of L1 and L2 at the time of supercritical attenuation should be less than 32.2yH, which is obviously satisfactory. The above formula. However, here is just an approximate quantitative measurement. In fact, the current-/time curve and voltage-/time curves iu" and Vlamp shown in Figure 3 show that there are still slight over-oscillation spikes after individual main spikes (indicated by or in Figure 3), - 13- 200926897 They have opposite polarities and are one-fifth to one-sixth of the main peak in terms of current in terms of current ratio, which is one-fifth of the voltage. The switching transistors S1-S4 shown in Fig. 1 are IGBTs. As shown in Fig. 1, the antiparallel diodes D1-D4 are turned on. For example, when using a FET, this function can be achieved by the inherent body diode. Thus, the reverse oscillation shown in Fig. 3 is caused, i.e., the opposite polarity peak is displayed in the time chart. The regular characteristics at 50% in Fig. 3 can basically have other flaws. 〇 Compared to the prior art EP 1 75 3 272 A2, it should be noted here: In this document a current valve is used to achieve a “attenuation of the reverse oscillation characteristic”. The original "ohmic" choke of the LC-oscillation circuit is slightly mild in this document. Therefore, in Figure 4 of the document, the total charging inductance is set to 208 # 在 in the DBD-lamp of the same class. The effect of this current valve in this file is additionally described in paragraph 0018. The rising current 値 and voltage 所述 described in this document are based on the cutoff action of the Q current valve diode in this document. In the present invention, such a current valve is not required. Instead, the charging inductance is designed to be very small. The advantages of this approach have been described above. Moreover, the description in this document is of course also applicable to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a simplified circuit schematic diagram of one embodiment of the present invention. Fig. 2 is an equivalent circuit diagram of a DBD-lamp constructed by Fig. 1. Figure 3 shows the current-/time curve of the circuit formed by Figure 1 and the voltage-/time curve of -14-200926897. [Main component symbol description] S 1 -S4 switching transistor D 1-D4 diode LI -L2 charging inductor DBD D B D - lamp Cl , C2 capacitor R1 ohmic resistor ❹
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