201250767 六、發明說明： [0001] 【發明所屬之技術領域】 本發明為有關一種高強度氣體放電燈，尤指一種可消除 該放電燈點燈時所產生的音頻共振之情形的高強度氣體 放電燈燈管結構。 [0002] 【先前技術·】 相較於傳統鎢絲燈泡，高強度氣體放電燈（high intensity discharge lamp ， HID) 不需裝設鶴絲 ，故不 〇 會有鎢絲燈泡其鎢絲容易斷裂、損耗的情形，因而具有 較長的使用壽命，可達1 0000小時以上，同時，高強度氣 體放電燈的發光效率根據充填不同的發光元素而異，分 別可達每瓦60〜150流明以上，是鎢絲燈泡的3〜10倍， 可說是目前節能效益最高且實用化之照明光源。基於上 述優點，高強度氣體放電燈已廣泛應用如公園、運動場 、商店以及道路上的照明，近來尤其是大量使用在車輛 的頭燈上。 〇 _3] 然而，現今的高強度氣體放電燈，在使用高頻電子式安 定器點燈時，因放電頻率的關係，使燈管内的氣體被週 期性的加熱及冷卻，其結果使該氣體於燈管内產生了同 步的壓力張弛，從而形成一壓力波而在燈管内來回震盪 ，此震盪的壓力波與燈管内壁反射回來的壓力波同相位 時，會產生共振，因其共振頻率在音頻範圍内，因此稱 為音頻共振，而發生音頻共振的頻率會因燈管構造不同 而異，且燈管内壁不同之位置也會形成不同的共振頻率 ，由於這些共振彼此混合，使得即使同一顆高強度氣體 100119510 表單編號A0101 第3頁/共20頁 1002032994-0 201250767 放電燈也會有非常多會產生音頻共振的頻率範圍。當形 成音頻共振時，該壓力波會被加強，而壓迫到燈管内的 放電電弧，使得放電電弧產生彎曲、抖動以及放電電壓 、電流的高低起伏，進而使光輸出起伏波動或閃爍，嚴 重時還會造成放電電弧熄滅，甚至是燈管的爆裂。 [0004] 為解決此種因壓力波而產生之不穩定音頻共振的情形， 中華民國專利公開第201 0381 34號揭示可以高頻（高於 500kHz)電流，或是以低頻（低於1kHz)方波電流驅動燈 管，藉此避開音頻共振頻率，惟如此將增加電子式安定 器電路設計之複雜度，進而提高成本。此外，另有提出 一種將不同的高強度氣體放電燈搭配特定規格之安定器 的解決方法，或是針對不同廠家製作的燈管的音頻共振 特性，把安定器的點燈頻率設定在某些不會產生音頻共 振的頻率窗口，然此舉將限制不同廠商生產之安定器與 高強度氣體放電燈彼此間搭配使用的相容性，也增加電 子式安定器設計上的困難。綜上，當前仍無較符合經濟 效益的技術，可解決高強度氣體放電燈易發生音頻共振 的問題。 【發明内容】 [0005] 本發明的主要目的，在於解決習知高強度氣體放電燈， 必須搭配使用較高成本設計之特定頻率規格的安定器， 才可避免音頻共振的問題。 [0006] 為達上述目的，本發明提供一種高強度氣體放電燈結構 ，包含有一燈管、一第一電極、一第二電極以及複數個 凸出部，該燈管具有一放電空間以及一内壁面，該放電 100119510 表單編號A0101 第4頁/共20頁 1002032994-0 201250767 空間容置可離子化氣體；該第一電極與該第二電極位於 該放電空間内，該第一電極與該第二電極彼此相隔一放 電間距，該可離子化氣體於該放電間距之間形成一放電 電弧。該凸出部自該燈管之内壁面突向該放電空間，且 該凸出部具有可將放電電弧發出之壓力波反射發散至該 放電空間的反射表面。 [0007] 由以上可知，本發明相較於習知技術可達到的有益效果 在於： [0008] —、由於該燈管之内壁面設置有該凸出部，當該壓力波 於放電電弧形成瞬間在該燈管内產生時，該壓力波將碰 撞該凸出部的反射表面而朝向迥異於原先入射方向之反 射方向行進，因此，該壓力波將因此而被凸出部反射表 面發散而大幅降低其形成音頻共振之機會； [0009] 二、同時，當該壓力波經由多次反射及發散後，該壓力 波的強度將逐漸下降，終使該壓力波消失於該燈管内， 避免形成音頻共振，從而解決因發生音頻共振而導致放 電電弧熄滅或燈管破裂等問題； [0010] 三、本發明僅需對該燈管進行機械加工而得到具有該凸 出部的結構，或是於燈管製造時一併成形該凸出部，即 可避免後續使用上音頻共振的問題，而毋須牽涉電路元 件的設計，因此，可大幅減低生產成本。 【實施方式】 [0011] 有關本發明的詳細說明及技術内容，現就配合圖式說明 如下： 100119510 表單編號A0101 第5頁/共20頁 1002032994-0 201250767 [0012] 請先參閱「圖ΙΑ」，為本發明第一實施例的剖面結構示 意圖，本發明為一種高強度氣體放電燈結構，包含有一 燈管10、一第一電極20、一第二電極30以及複數個凸出 部13。該燈管10具有一放電空間11以及一内壁面12，該 放電空間11容置有可離子化氣體（圖中未示），於本實施 例中，該可離子化氣體為氙氣；該第一電極20與該第二 電極30設置於該放電空間11内，其中，該第一電極20具 有一第一放電端21，該第二電極30具有一第二放電端31 ，且該第一放電端21與該第二放電端31之間相距一放電 Γ) 間距，該第一放電端21及該第二放電端31透過施加外部 電力而產生一放電電弧。 [0013] 於本實施例中，該燈管10的外形為長橢球型，然本發明 並不限於此，依實際應用需求，該燈管10的外形可為圓 球形、圓柱型或不規則的長橢球形，且該燈管10的材質 可為氧化鋁陶瓷或石英玻璃。此外，該可離子化氣體可 為惰性氣體或其與鹵素之混合物，惰性氣體可為氖、氩 、氪、氙或其混合物，鹵素可為氯、溴、碘或其混合物 ，其中，添加_素之目的在於增加該放電燈的使用壽命 。該可離子化氣體可進一步包含裡、鈉、銘、銃、鋅、 嫁、砸、銦、錫、鈽、镨、矩、鏑、欽、録、給、汞、 銘、灶中之任一種或其一種以上之混合物或化合物，以 令該放電燈可發出不同顏色之光線，因應各種使用場合 。除此之外，在本實施例中，該第一電極20及該第二電 極30的材料可為鎢、鑭鎢、钍鎢或鈽鎢之金屬或合金， 且該凸出部13的表面形狀可為圓錐形、角錐形或圓弧形 100119510 表單編號Α0101 第6頁/共20頁 1002032994-0 201250767 [0014] Ο [0015]201250767 VI. Description of the Invention: [0001] The present invention relates to a high-intensity gas discharge lamp, and more particularly to a high-intensity gas discharge capable of eliminating the situation of audio resonance generated when the discharge lamp is lit. Lamp tube structure. [0002] [Previous Technology·] Compared with the conventional tungsten filament bulb, the high intensity discharge lamp (HID) does not need to be equipped with a crane wire, so there is no tungsten filament bulb, and the tungsten filament is easily broken. In the case of loss, it has a long service life of up to more than 100,000 hours. At the same time, the luminous efficiency of high-intensity discharge lamps varies according to different luminescent elements, which can reach 60~150 lumens per watt, respectively. 3 to 10 times that of tungsten light bulbs, it can be said that it is currently the most energy-efficient and practical lighting source. Based on the above advantages, high-intensity discharge lamps have been widely used in parks, sports fields, shops, and on-road lighting, and have recently been used in large quantities on the headlights of vehicles. 〇_3] However, in today's high-intensity gas discharge lamps, when the high-frequency electronic ballast is used for lighting, the gas in the lamp tube is periodically heated and cooled due to the discharge frequency. The gas generates a synchronous pressure relaxation in the lamp tube, thereby forming a pressure wave to oscillate back and forth in the lamp tube. When the oscillating pressure wave is in phase with the pressure wave reflected from the inner wall of the lamp tube, resonance occurs due to resonance. The frequency is in the audio range, so it is called audio resonance, and the frequency of the audio resonance will vary depending on the structure of the lamp, and different positions will be formed at different positions on the inner wall of the tube. Since these resonances are mixed with each other, even The same high-intensity gas 100119510 Form No. A0101 Page 3 / Total 20 pages 1002032994-0 201250767 Discharge lamps also have a very large frequency range that produces audio resonance. When the audio resonance is formed, the pressure wave is strengthened, and the discharge arc is pressed into the lamp tube, so that the discharge arc is bent, shaken, and the voltage and current of the discharge voltage and current fluctuate, thereby causing the light output to fluctuate or flicker. It also causes the discharge arc to go out, even the burst of the lamp. [0004] In order to solve such an unstable audio resonance caused by a pressure wave, the Republic of China Patent Publication No. 201 0381 34 discloses that a high frequency (above 500 kHz) current or a low frequency (less than 1 kHz) can be used. The wave current drives the lamp, thereby avoiding the audio resonance frequency, but this will increase the complexity of the electronic ballast circuit design, thereby increasing the cost. In addition, a solution for matching different high-intensity gas discharge lamps with a ballast of a specific specification or a sound resonance characteristic of a lamp made by different manufacturers is proposed, and the lighting frequency of the ballast is set to some The frequency window of the audio resonance will be generated, but this will limit the compatibility of the ballasts produced by different manufacturers and the high-intensity gas discharge lamps, and increase the difficulty in designing the electronic ballast. In summary, there are still no economically viable technologies that can solve the problem of high-intensity gas discharge lamps susceptible to audio resonance. SUMMARY OF THE INVENTION [0005] The main object of the present invention is to solve the problem of audio resonance by using a conventional high-intensity gas discharge lamp that must be used in conjunction with a ballast of a specific frequency specification designed at a higher cost. [0006] In order to achieve the above object, the present invention provides a high-intensity gas discharge lamp structure including a lamp tube, a first electrode, a second electrode, and a plurality of protrusions, the lamp tube having a discharge space and an inner portion Wall, the discharge 100119510 Form No. A0101 Page 4 / Total 20 pages 1002032994-0 201250767 Space accommodating ionizable gas; the first electrode and the second electrode are located in the discharge space, the first electrode and the second The electrodes are spaced apart from each other by a discharge spacing, and the ionizable gas forms a discharge arc between the discharge intervals. The projection protrudes from the inner wall surface of the tube toward the discharge space, and the projection has a reflective surface that reflects the pressure wave emitted from the discharge arc to the discharge space. [0007] From the above, the beneficial effects that the present invention can achieve compared to the prior art are: [0008] - since the inner wall surface of the lamp tube is provided with the protruding portion, when the pressure wave is formed at the moment of the discharge arc When generated in the lamp tube, the pressure wave will collide with the reflecting surface of the protruding portion and travel toward a reflection direction different from the original incident direction. Therefore, the pressure wave will be diverged by the convex reflecting surface and thus greatly reduced. It forms an opportunity for audio resonance; [0009] 2. At the same time, when the pressure wave is reflected and diverged multiple times, the intensity of the pressure wave will gradually decrease, and the pressure wave disappears in the tube to avoid audio formation. Resonance, thereby solving the problem that the discharge arc is extinguished or the lamp tube is broken due to the occurrence of the audio resonance; [0010] 3. The present invention only needs to machine the lamp tube to obtain the structure having the protruding portion, or the lamp When the tube is formed at the time of manufacture, the problem of subsequent use of the audio resonance can be avoided, and the design of the circuit component is not required, so that the production cost can be greatly reduced. [Embodiment] [0011] The detailed description and technical contents of the present invention will now be described as follows: 100119510 Form No. A0101 Page 5 of 20 1002032994-0 201250767 [0012] Please refer to "图ΙΑ" The present invention is a high-intensity gas discharge lamp structure comprising a lamp tube 10, a first electrode 20, a second electrode 30, and a plurality of protrusions 13. The lamp tube 10 has a discharge space 11 and an inner wall surface 12, and the discharge space 11 houses an ionizable gas (not shown). In this embodiment, the ionizable gas is helium; The electrode 20 and the second electrode 30 are disposed in the discharge space 11. The first electrode 20 has a first discharge end 21, the second electrode 30 has a second discharge end 31, and the first discharge end 21 is spaced apart from the second discharge end 31 by a discharge ,) spacing, and the first discharge end 21 and the second discharge end 31 generate a discharge arc by applying external power. [0013] In the embodiment, the shape of the lamp tube 10 is a long ellipsoidal shape, but the invention is not limited thereto, and the shape of the lamp tube 10 may be spherical, cylindrical or irregular according to practical application requirements. The long ellipsoid is spherical, and the material of the tube 10 can be alumina ceramic or quartz glass. In addition, the ionizable gas may be an inert gas or a mixture thereof with a halogen, the inert gas may be helium, argon, neon, krypton or a mixture thereof, and the halogen may be chlorine, bromine, iodine or a mixture thereof, wherein _ The purpose is to increase the service life of the discharge lamp. The ionizable gas may further comprise any one of lining, sodium, indium, strontium, zinc, marry, strontium, indium, tin, antimony, bismuth, moment, bismuth, chin, recording, giving, mercury, inscription, and stove. More than one mixture or compound, so that the discharge lamp can emit light of different colors, in response to various use occasions. In addition, in this embodiment, the material of the first electrode 20 and the second electrode 30 may be a metal or an alloy of tungsten, tantalum tungsten, tantalum tungsten or tantalum tungsten, and the surface shape of the protrusion 13 Can be conical, pyramidal or arc-shaped 100119510 Form number Α0101 Page 6 / Total 20 pages 1002032994-0 201250767 [0014] Ο [0015]
如「圖ΙΑ」所示，在此實施例中，該燈管丨〇具有相對設 置的一第一端口 15及一第二端口 16，且該燈管1〇之外徑 分別朝該第一端口 15與該第二端口 16漸縮。該第一端口 15與該第二端口 16供該第一電極2〇與該第二電極3〇嵌入 固定，據此，透過該第一電極2〇及該第二電極3〇分別封 閉該第一端口 15及該第二端口 16，令該燈管1〇内可形成 封閉的該放電空間11，以填充可離子化氣體於其中。請 搭配參閱「圖1Β」，為本發明第一實施例的局部放大示 意圖，該凸出部13自該燈管1〇之内壁面12突向該放電空 間11，並於相鄰兩凸出部13之間形成一凹陷部14，該凸 出部13各包含一反射表面131，在此實施例中，該反射表 面131 ’包括一第一傾斜面132及一第二傾斜面丨33，該 第一傾斜面132與該第二傾斜面133間夾一頂角α。 於點燈啟動時，該第一電極2〇與該第二電極3〇接收高電 壓的外部電力，而於該第一放電端21及該第二放電端31 之間形成一放電電弧，進而發出光線。在形成該放電電 弧的同時，該燈管1〇内的該可離子化氣體受到因放電電 弧頻率產生的週期性加熱及冷卻，從而產生一波一波不 間斷的壓力波40，請參閱「圖2」所示，為本發明第一實 施例的壓力波路徑示意圖。「圖2j顯示該壓力波4〇形成 後於該燈管10中的路徑，在此實施例中，以該壓力波4〇 於該燈管10内經過兩次反射做為舉例說明，該壓力波4〇 包括一發射波41、一第一反射波42與一第二反射波43， 當該第一電極20與該第二電極3〇之間建立該放電電弧後 100119510 表單編號A0101 第7頁/共20頁 1002032994-0 201250767 ，該發射波41先碰撞其中一該凸出部13，而該凸出部13 的反射表面131將令該發射波41反射至一與該發射波41行 進方向相異的方位，即形成該第一反射波42，接著，該 第一反射波42遇到另一該凸出部13的反射表面131後，該 第一反射波42將反射至另一與該第一反射波42行進方向 相異的方位’即形成該第二反射波43，因此，該凸出部 13的反射表面131可將該壓力波40發散於該放電空間11 内，而不讓該壓力波40於同一轴線重覆折返，因此避免 了音頻共振的情形。 [0016] 此外，當壓力波40碰觸該凸出部13的反射表面131時，會 被該反射表面131反射發散’其反射發散方向依入射角等 於出射角的物理原則’從而使壓力波4〇強度亦因此而被 分散減弱’經多次反射後終至消失，例如該發射波41依 序轉換為該第一反射波42及該第二反射波43的同時，該 壓力波40的強度亦將逐漸減弱，換言之，該第二反射波 43的強度小於該第一反射波42 ’而該第一反射波42的強 度小於該發射波41，當經過多次反射後，該發射波41最 終將失去強度。 [0017] 請繼續參閱「圖3A」與「圖3B」所示，為本發明第二實 施例的剖面結構及局部放大示意圖，在此實施例中，該 凸出部13之外徑沿該凸出部13突起之一軸向漸縮，並使 該凸出部13之反射表面131成形為一弧形曲面134。請參 閱「圖4」，為本發明第二實施例的壓力波路徑示意圖， 同樣的，該壓力波40產生後’該發射波41將碰撞該凸出 部13，陸續轉換為方向迥異的該第一反射波42及該第二 100119510 表單編號A0101 第8頁/共20頁 1002( 201250767 反射波43 ’且該壓力波40的強度漸漸減弱，故避免音頻 共振的情形。再請搭配參閱「圖5」，為本發明第二實施 例的壓力波反射示意圖，當複數個方向一致的壓力波 射向該反射表面131，由於該弧形曲面134上相異位置的 切面互不平行，故該壓力波50將分別反射至不同的方向 ，即轉換為複數個方向分散的反射波51。 . [0018] Ο ❹ [0019] 於上述實施例中，該凸出部13以成形為一尖錐狀（如第一 實施例的「圖1Α」與「圖1Β」所示）或一半球狀（如第二 實施例的「圖3Α」與「圖3Β」所示），且該反射表面131 呈一平面或一弧形曲面134做為舉例說明，然本發明並不 限於此，依據實際應用需求或製造考量，該凸出部13亦 可為各種幾何形狀’如矩形或不規則之凸出結構。此外 ’上述實施例的該凸出部13為呈規則排列，但於其他實 施例中，該凸出部13亦可呈散亂排列；或依特定圖樣擺 置。或者’該凸出部13可為沿一平行於該燈管1〇之内壁 面12的長方向延伸，即該凸出部13呈一山脊狀，並分佈 於該燈管10之内壁面12。 綜上所述，由於本發明藉由於燈管的内壁面設置複數凸 出部，並利用複數該凸出部反射表面的反射，分散壓力 波反射路控，削減了壓力波的強度，從而避免了音頻共 振的發生’進而解決了高強度氣體放電燈因音頻共振而 造成的閃爍、熄滅，甚至是燈管爆裂的問題。同時，本 發明僅需對該燈管進行機械加工，得到具有該凸出部的 結構，或疋於製造該燈管時成形該凸出部，即可避免後 續使用上音頻共振的問題，而毋須牽涉電路元件的設計 100119510 表單編號A0101 第9頁/共20頁 1002032994-0 201250767 ，故可大幅減低燈具的生產及使用成本。因此本發明極 具進步性及符合申請發明專利的要件，爰依法提出申請 ，祈鈞局早曰賜准專利，實感德便。 [0020] [0021] [0022] [0023] [0024] [0025] [0026] [0027] [0028] [0029] [0030] [0031] [0032] 以上已將本發明做一詳細說明，惟以上所述者，僅爲本 發明的一較佳實施例而已，當不能限定本發明實施的範 圍。即凡依本發明申請範圍所作的均等變化與修飾等， 皆應仍屬本發明的專利涵蓋範圍内。 【圖式簡單說明】 「圖1A」，為本發明第一實施例的刳面結構示意圖。 「圖1B」，為本發明第一實施例的局部放大示意圖。 「圖2」，為本發明第一實施例的壓力波路徑示意圖。 「圖3A」，為本發明第二實施例的剖面結構示意圖。 「圖3B」，為本發明第二實施例的局部放大示意圖。 「圖4」，為本發明第二實施例的壓力波路徑示意圖。 「圖5」，為本發明第二實施例的壓力波反射示意圖。 【主要元件符號說明】 10 :燈管 11 :放電空間 12 :内壁面 1 3 :凸出部 131 :反射表面 100119510 表單編號A0101 第10頁/共20頁 1002032994-0 201250767 [0033] 132:第一傾斜面 [0034] 133 :第二傾斜面 [0035] 134 :弧形曲面 [0036] 1 4 :凹陷部 [0037] 1 5 :第一端口 [0038] 16 :第二端口 [0039] 20 :第一電極 〇 [0040] 21 :第一放電端 [0041] 30 :第二電極 [0042] 31 :第二放電端 [0043] 40 :壓力波 [0044] 41 :發射波 [0045] 〇 42 :第一反射波 [0046] 43 :第二反射波 [0047] 5 0 :壓力波 [0048] 51 :反射波 [0049] α :頂角 100119510 表單編號Α0101 第11頁/共20頁 1002032994-0As shown in FIG. 3, in this embodiment, the lamp tube has a first port 15 and a second port 16 disposed opposite to each other, and the outer diameter of the tube 1 分别 faces the first port respectively. 15 is tapered with the second port 16. The first port 15 and the second port 16 are configured to be embedded and fixed by the first electrode 2 and the second electrode 3, respectively, and the first electrode 2 and the second electrode 3 are respectively closed by the first electrode 2 The port 15 and the second port 16 form a closed discharge space 11 in the lamp tube 1 to fill the ionizable gas therein. Please refer to FIG. 1A for a partial enlarged view of the first embodiment of the present invention. The protruding portion 13 protrudes from the inner wall surface 12 of the tube 1 toward the discharge space 11 and adjacent to the two protrusions. A recessed portion 14 is formed between the 13 and the reflective portion 13 includes a reflective surface 131. In this embodiment, the reflective surface 131 ′ includes a first inclined surface 132 and a second inclined surface 丨 33. An inclined surface 132 is sandwiched between the inclined surface 132 and the second inclined surface 133. When the lighting is started, the first electrode 2〇 and the second electrode 3〇 receive a high-voltage external power, and a discharge arc is formed between the first discharge end 21 and the second discharge end 31, thereby emitting Light. While forming the discharge arc, the ionizable gas in the lamp vessel 1 is periodically heated and cooled by the discharge arc frequency, thereby generating a wave of uninterrupted pressure waves 40, see "Figure 2" is a schematic view of the pressure wave path of the first embodiment of the present invention. "Fig. 2j shows the path of the pressure wave 4 〇 in the bulb 10, and in this embodiment, the pressure wave 4 is subjected to two reflections in the bulb 10 as an example, the pressure wave 4〇 includes a transmitting wave 41, a first reflected wave 42 and a second reflected wave 43. After the discharge arc is established between the first electrode 20 and the second electrode 3〇, 100119510 Form No. A0101 Page 7 / A total of 20 pages 1002032994-0 201250767, the emitted wave 41 first hits one of the protrusions 13, and the reflecting surface 131 of the protrusion 13 will reflect the emitted wave 41 to a direction different from the traveling direction of the transmitting wave 41. Orienting, that is, forming the first reflected wave 42. Then, after the first reflected wave 42 encounters the reflective surface 131 of the other protruding portion 13, the first reflected wave 42 will reflect to the other and the first reflection The direction of travel of the wave 42 is different, that is, the second reflected wave 43 is formed. Therefore, the reflective surface 131 of the protruding portion 13 can diverge the pressure wave 40 into the discharge space 11 without the pressure wave 40. The foldback is repeated on the same axis, thus avoiding the situation of audio resonance. [0016] When the pressure wave 40 touches the reflective surface 131 of the protrusion 13 , the reflection surface 131 is reflected by the reflection surface 131, and the direction of the reflection divergence is equal to the physical principle of the angle of incidence corresponding to the angle of incidence, so that the intensity of the pressure wave is also However, the intensity of the pressure wave 40 is gradually weakened, and the intensity of the pressure wave 40 is gradually reduced, as the transmitted wave 41 is sequentially converted into the first reflected wave 42 and the second reflected wave 43. In other words, the intensity of the second reflected wave 43 is smaller than the first reflected wave 42' and the intensity of the first reflected wave 42 is smaller than the emitted wave 41. When a plurality of reflections are made, the transmitted wave 41 will eventually lose its intensity. Please refer to FIG. 3A and FIG. 3B for a cross-sectional structure and a partially enlarged schematic view of the second embodiment of the present invention. In this embodiment, the outer diameter of the protruding portion 13 is along the convex portion. One of the projections of the portion 13 is axially tapered, and the reflecting surface 131 of the projection 13 is shaped into a curved curved surface 134. Please refer to FIG. 4 , which is a schematic diagram of a pressure wave path according to a second embodiment of the present invention. Similarly, after the pressure wave 40 is generated, the emitted wave 41 will collide with the protruding portion 13 and be successively converted into the same direction. A reflected wave 42 and the second 100119510 form number A0101 page 8 / 20 pages 1002 (201250767 reflected wave 43 ' and the intensity of the pressure wave 40 is gradually weakened, so avoid audio resonance. Please refer to "Figure 5 The pressure wave reflection diagram of the second embodiment of the present invention, when a plurality of pressure waves having the same direction are directed toward the reflection surface 131, the pressure waves are not parallel to each other on the curved surface 134. 50 will be respectively reflected to different directions, that is, converted into a plurality of directions of scattered reflected waves 51. [0018] In the above embodiment, the protruding portion 13 is shaped into a tapered shape (such as The first embodiment is shown in FIG. 1A and FIG. 1B or half-spherical (as shown in FIG. 3A and FIG. 3B in the second embodiment), and the reflective surface 131 is in a plane or An arcuate surface 134 is taken as an example, The present invention is not limited thereto, and the protruding portion 13 may also have various geometric shapes such as a rectangular or irregular protruding structure according to actual application requirements or manufacturing considerations. Further, the protruding portion 13 of the above embodiment is Regularly arranged, but in other embodiments, the protrusions 13 may also be arranged in a random arrangement; or placed in a specific pattern. Or 'the protrusion 13 may be along an inner wall parallel to the tube 1〇 12 extends in the longitudinal direction, that is, the projection 13 has a ridge shape and is distributed on the inner wall surface 12 of the tube 10. As described above, since the present invention is provided with a plurality of projections on the inner wall surface of the tube, And using the reflection of the reflective surface of the plurality of protrusions, dispersing the pressure wave reflection path, reducing the intensity of the pressure wave, thereby avoiding the occurrence of audio resonance, thereby solving the flicker caused by the audio resonance of the high-intensity discharge lamp, Extinguish, even the problem of bursting of the lamp. At the same time, the invention only needs to machine the lamp tube to obtain the structure with the protruding portion, or to form the protruding portion when manufacturing the lamp tube, thereby avoiding Follow-up The problem of audio resonance does not involve the design of circuit components 100119510 Form No. A0101 Page 9 / Total 20 pages 1002032994-0 201250767, so the production and use cost of the lamp can be greatly reduced. Therefore, the present invention is highly progressive and conforms to the application. The requirements of the invention patent, 提出 application in accordance with the law, the 钧 钧 曰 曰 曰 曰 , , , 。 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [0032] The present invention has been described in detail above, but the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention. That is, the equivalent changes and modifications made by the scope of the present application should remain within the scope of the patent of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1A is a schematic view showing the structure of a facet according to a first embodiment of the present invention. Fig. 1B is a partially enlarged schematic view showing the first embodiment of the present invention. Fig. 2 is a schematic diagram of a pressure wave path according to a first embodiment of the present invention. Fig. 3A is a schematic cross-sectional view showing a second embodiment of the present invention. Fig. 3B is a partially enlarged schematic view showing a second embodiment of the present invention. Fig. 4 is a schematic view showing a pressure wave path according to a second embodiment of the present invention. Fig. 5 is a schematic view showing pressure wave reflection according to a second embodiment of the present invention. [Description of main component symbols] 10: Lamp 11 : Discharge space 12 : Inner wall surface 1 3 : Projection 131 : Reflective surface 100119510 Form No. A0101 Page 10 / Total 20 pages 1002032994-0 201250767 [0033] 132: First Inclined surface [0034] 133: second inclined surface [0035] 134: curved curved surface [0036] 1 4 : depressed portion [0037] 1 5 : first port [0038] 16: second port [0039] 20: One electrode 〇 [0040] 21 : first discharge end [0041] 30 : second electrode [0042] 31 : second discharge end [0043] 40 : pressure wave [0044] 41 : emission wave [0045] 〇 42: A reflected wave [0046] 43: second reflected wave [0047] 5 0 : pressure wave [0048] 51 : reflected wave [0049] α : apex angle 100119510 Form number Α 0101 Page 11 / Total 20 pages 1002032994-0