201024848 六、發明說明： 【發明所屬之技術領域】 本發明係關於一種液晶顯示裝置，特別是關於一種適用於最 小化流經燈管之電流之振動所導致之雜訊之液晶顯示裝置。 【先前技術】 隨著資訊時代進步，以電訊號為基礎上在視覺上顯示大量資 料之顯示裝置被迅猛發展。因此，具有例如重量輕、樣式薄以及 電功率消耗低等卓越性能之平面顯示裝置已經廣泛被經銷。平面 @ 顯示裝置包含液晶顯示裝置、電漿顯示裝置、場發射顯示裝置、 電致發光顯示裝置等。這些習知技術之陰極射線管迅速地被平面 顯示裝置代替。 為了形成影像（或圖像）’因為液晶顯示裝置無法發射它們自 己的光線，所以液晶顯示裝置接收形成影像（或圖像）所需之光 線。換言之，液晶顯示裝置係為接收型裝置。因此，液晶顯示裝 置必須包含獨立的光源，例如背光單元。液晶顯示裝置中使用的© 背光單元賴螢紐管之放置被分_直下式或侧光式。直下式 背光單70包含複數個螢絲管，湖於液晶面板下方之平面上， 而侧光式背光單元包含放置於導光面板之一個側邊部上之一榮光 燈管。 更特別地，侧光式背光單元包含用於引導光線之導光面板以· 及放置於導絲板-側表面上的燈管部。燈管部包含發光燈管、 4 201024848 被安裝用於接收與保護燈管兩端之燈管支架，以及圍繞燈管之外 部圓周表面之反射板。反射板之一側表面被插入導光面板之一侧 表面内。反射板向導光面板方向反射燈管發射之光線。這種側光 式背光單元主要用於相對小尺寸之液晶顯示裝置中，小尺寸液晶 顯示裝置被應用於膝上型與桌上型電腦之監視器。侧光式背光單 元具有均勻的光分佈以及内部組件之長壽命，並且允許液晶顯示 裝置更薄。 直下式背光單元之發展從液晶顯示裝置之放大開始。直下式 背光單元包含複數個燈管，排列於擴散板下方以直接地照射光線 於液晶面板之整個表面上。這樣，直下式背光單元比側光式背光 單元具有更高的發光效率。考慮到這點，直下式背光單元主要被 用於需要高階亮度之大尺寸液晶顯示裝置中。其間，直下式背光 單元包含很乡燈管。包含直τ式背光單元㈣顯示裝置之大尺寸 監視器或電視比膝上型電腦具有更長之壽命。由於這些原因，直 下式背光單元_光式背光單元更雜蚊障，並錄可能由於 部分燈管之壽命結束將無法工作。 實際上，應用至液晶顯示裝置之直下式背光單元包含：複數 個榮光燈管，排列於上下框卿成的内部空間（或腔室）中；反 射板，放置於複數個螢光燈管下方並且用於反射光線；以及光學 片’放置於複脑t統管上方並且祕舰與⑽複數個螢光 燈官之光線。複數個螢光燈管被插入平衡印刷電路板上的固定組 5 201024848 件内’並且被放置於底蓋内。平衡印刷電路板與底蓋透過之間形 成的絕緣層彼此絕緣。 當複數個螢光燈管使用與燈管驅動電壓分別對應的電流產生 光線時’流經螢光燈管的電流導致振動（vibrations)。此振動被傳 送至平衡印刷電路板。傳送的振動到達底蓋，透過絕緣層被降低 為非常輕微之程度。 然而，當液晶顯示裝置逐漸變薄時，絕緣層之厚度也隨之降 低。這樣，平衡印刷電路板與底蓋之間的距離被降低。此外，複 _ 數個螢光燈管解衡印織路板之__也被降低。由於這些 原因’與習知技術之振動相比’流經複數個螢光燈管之電流所造 成之振動大幅增加^此，底蓋之整個表面上可能產生雜訊。 【發明内容】 因此’本發明之目的在於提供一種液晶顯示裝置，實質上避 免習知技術之關與缺點所導致的—❹個問題。 本發月之目的在於提供—種液晶顯示裝置，包含：形成於平❹ 衡印刷電路板與底蓋之間的複數個絕緣層，與形成於平衡印刷電 路板與複數個絕緣層與底蓋之間的空氣層，從而最小化流經複數 個螢光燈管之電流之振動所導致的雜訊。 實施例其他的特徵和伽將在如下的·書中部分地加以闊. =，並且本發明其他的特徵和優點對於本領域的普通技術人員來 說’可以透過本發明如下的說簡崎分地理解或者可以從本發 201024848 明的實踐中得出。本發明的優點可以透過本發明所記載的說明書 和申請專利範圍中特別指明的結構並結合圖式部份，得以實現和 獲得。 依照實施例之一般方面’液晶顯示裝置包含：液晶面板；背 光單元’包含複數個燈管，排列於液晶面板之後表面上，以及複 數個光學片，用於應用複數個燈管發射之光線至液晶面板；底蓋， 用於接收液晶面板與背光單元；第一與第二平衡印刷電路板，各 ® 自被放置於底蓋之内侧之左右邊緣處，各自包含用於接收複數個 燈管兩端之燈管插座；第一絕緣膜；第二絕緣膜，被放置於底蓋 與第一與第二平衡印刷電路板之間，第一絕緣膜被放置於第一與 第二平衡印刷電路板與第二絕緣膜之間，其中至少兩個空氣層形 成於平衡印刷電路板與第二絕緣膜之間。 依照實施例之另一方面，液晶顯示裝置包含：液晶面板；背 光單元，包含複數個燈管，排列於該液晶面板之後表面上，以及 複數個光學片，用於應用複數個燈管發射之光線至液晶面板；底 蓋，用於接收液晶面板與背光單元；第一與第二平衡印刷電路板， 各自被放置於底蓋之内侧之左右邊緣處，各自包含用於接收複數 個燈管兩端之燈管插座；防音材料之反射板，被放置於底蓋之内 側上，並且用於反射複數個燈管發射的光線至光學片；以及絕緣 膜，被放置於底蓋與第一與第二平衡印刷電路板之間，並且相對 第一與第二平衡印刷電路板而形成，其中至少兩個空氣層形成於 201024848 第一與第二平衡印刷電路板與反射板之間。 考察以下圖式以及詳細描述，本領域之技術人員顯然可看出 其他系統、方法、特徵以及優點。全部這些祕、方法、特徵以 及優點將包含於此描述巾，係在本發明之賴細之内，並且受 到以下中請專概圍之倾。此章節内容並非被視為這些專利申 凊範圍之_。以下結合實施靖論其他方面與優點。可以理解 的是，如上所述的本發明之概括說明和隨後所述的本發明之詳細 說明均是具有代綠和轉性的說明，並且是為了進—步揭示本 發明之申請專利範圍。 【實施方式】 現在將結合圖式部份對本發明的較佳實施方式作詳細說明。 以下介紹的這些實施例被用作例子，以將它們的精神傳達至本領 域之普通技術人員。因此，這些實施例以不同形狀被具體化，而 並非限制於本說明書所述之這些實施例。此外，為了圖式之方便， 此裝置之尺寸與厚度可以被放大。在本揭露以及這些圖式部份中 所使用的相同的參考標號代表相同或同類部件。 「第1圖」所示係為本揭露第一實施例之液晶顯示裝置之展 開透視圖。請參考「第1圖」，本揭露第一實施例之液晶顯示裝置 包含液晶面板110以及第一與第二印刷電路板Ilia與lllb。液晶 面板110包含上下基板，其間包含液晶層。在上基板與下基板上， 用於產生電場之電極彼此相對形成。第一與第二印刷電路板111a 201024848 與111b連接至液晶面板110，並且應用掃描訊號與資料訊號至下 基板上形成的閘極線與資料線。用於供應掃描訊號至閘極線之閘 極驅動器被裝設於第一印刷電路板Ilia上。用於供應資料至資料 線之資料驅動器被裝設於第二印刷電路板111b上。 液晶顯示裝置更包含背光單元120,背光單元120被放置於液 晶面板110之後表面上並且應用光線至液晶面板11()。背光單元 120係為直下型。這樣，背光單元12〇包含複數個燈管122以及複 參數個光學片（optical sheets) 114。燈管122依照固定間隔彼此平 行排列。光學片114堆疊於燈管122上方並且擴散燈管122發射 的光線，從而改善視角。 這種液晶顯示裝置被調變為導光面板112、底蓋126、頂殼(top case) 140以及複數個組合構件（圖中未表示）。導光面板112具 有矩形邊緣形狀，圍繞液晶面板11〇與背光單元12〇。底蓋126支 撐背光單元120之侧面與後面。頂殼140形成為矩形邊緣形狀， 圍繞液晶面板110之前方（或上部）表面之邊緣，並且與導光面 板112組合。複數個組合構件組合導光面板112、底蓋126以及頂 殼 140。 為了解釋背光單元120中燈管122之組合配置，複數個燈管 122之一端被緊固至第一平衡印刷電路板（Balance pjinted circuit Board ; B-PCB) 124a，複數個燈管122之另一端被緊固至第二平 衡印刷電路板124b。第一與第二平衡印刷電路板124a與12物被 201024848 支撐側塊（support sider) 116所覆蓋。支撐侧塊116分別與支撐 後部之底蓋126的兩側邊緣以及背光單元120之側表面組合。反 射板132被放置於底蓋之内部上。反射板132用以反射複數個燈 管122發射之光線’並且應用反射光線至複數個光學片114。此外， 第三印刷電路板（圖中未表示）被放置於底蓋126之後表面上。 第三印刷電路板包含反向器（圖中未表示），用於應用燈管驅動電 壓至複數個燈管122。 第一與第二平衡印刷電路板124a與124b各自包含燈管插座 134。燈管插座134沿第一與第二平衡印刷電路板124a與124b各 自的縱向方向排列成列，並且透過焊接被緊固至第一與第二平衡 印刷電路板124a與124b。每一燈管122之兩端被插入燈管插座 134 内。 第一絕緣膜與第二絕緣膜被提供於第一與第二平衡印刷電路 板124a與124b之對面’其中第一與第二平衡印刷電路板124a與 124b被放置於底蓋126之左/右側邊緣上。第一絕緣膜與第二絕 緣膜被堆疊於底蓋126與第一與第二平衡印刷電路板124a與124b 之間’並且形成堆疊層。換言之’第一絕緣膜位於第一與第二平 衡印刷電路板124a與124b與第二絕緣膜之間，第二絕緣膜位於 第一絕緣膜與底蓋126之間。此外，第一絕緣膜與第二絕緣膜由 包含聚對笨二曱酸乙二酯（poly ethylene terephthalate ; PET )或聚 碳酸醋（polycarbonate ; PC)之材料形成。 201024848 更特別地，第一絕緣膜包含第一左絕緣臈128a與第一右絕緣 膜128b，第二絕緣膜包含第二左絕緣膜13〇a與第二右絕緣膜 130b。第一左絕緣膜128a被放置於第一平衡印刷電路板i24a與 第二左絕緣膜130a之間，第一右絕緣膜〗28b被放置於第二平衡 印刷電路板124b與第二右絕緣膜i3〇b之間。第二左絕緣膜i3〇a 被放置於第一左絕緣膜128a與底蓋126之間，第二右絕緣膜130b 被放置於第一右絕緣膜128b與底蓋126之間。 「第2圖」所示係為「第1圖」之液晶顯示裝置之調變狀態 之剖視圖’「第3圖」所示係為「第2圖」之第一平衡印刷電路板 與第一與第二絕緣膜依照順序堆疊之狀態之剖視圖。如「第1圖」、 「第2圖」與「第3圖」所示，底蓋126接收背光單元（「第丄圖」 之背光單元120)以及包含組合上基板101與下基板1〇3之液晶面 板110。液晶面板110之下基板103上的閘極線與資料線彼此交 又，並且定義晝素區域。薄膜電晶體（圖中未表示）分別形成於 畫素區域中。與晝素區域相對的純濾光學片順彳且重複地形成 於上基板101之上。偏光板（圖中未表示）被接合至上基板 與下基板103之外表面。 反射板132被接合至底蓋126之内表面，第一與第二平衡印 刷電路板124a與124b被放置於底蓋126之左右侧邊緣處。第一 左絕緣膜128a與第二左絕緣膜130a形成於底蓋126與第一平衡 印刷電路板124a之間。類似地，第一右絕緣膜12跖與第二右絕 11 201024848 緣膜130b形成於底蓋126與第二平衡印刷電路板124b之間。第 一絕緣膜與第二絕緣膜之總厚度等於習知技術液晶顯示裝置中底 * 蓋與平衡印刷電路板之間的絕緣膜之厚度。 因此，第二絕緣膜被放置於底蓋120上，第一絕緣膜被放置 於第二絕緣膜上，第一與第二平衡印刷電路板124a與124b被放 置於第一絕緣膜之上。這樣，空氣層即第一空氣層被提供於第一 與第二平衡印刷電路板124a與124b與第一絕緣膜之間，第一絕 緣膜與第一絕緣膜之間，以及第二絕緣膜與底蓋126之間。換言❹ 之，至少兩個空氣層形成於第一平衡印刷電路板124a與底蓋126 之間’以及至少兩個空氣層形成於第二平衡印刷電路板㈣與底 蓋126之間。 當第一與第二平衡印刷電路板124a與124b上流經燈管122 之電流產生振動’並且此振動被傳送至第—與第二平衡印刷電路 板124a與124b時’空氣層吸收部分被傳送至第一與第二平衡印 刷電路板124a與124b之振動。因此，到達底蓋126之振動極大❹ 地被降低。 換言之，放置於平衡印刷t路板與底蓋126之間的至少兩層 絕緣膜能夠形成至少兩個空氣層，這樣部分位於絕緣膜之間的空 氣層用於吸收透過平衡印刷電路板與第一與第二絕緣膜從燈管 122傳送至底蓋126之振動。這樣，從燈管122傳送至底蓋 之振動極大地降低。 12 201024848 依照這種方式，本揭露第一實施例之液晶顯示裝置包含至少 兩個絕緣層，形成於平衡印刷電路板與底蓋126之間，並且允許 提供至少兩個空氣層。這種空氣層吸收燈管122中產生的振動。 因此，傳送至底蓋126之振動極大地降低。 第一與第二絕緣膜由例如聚氨基甲酸酯泡沫（ foam)與poron (poron係為聚氨基甲酸酯材料之衝擊吸收物質） 等一系列防音(或多泡)材料任意其一形成，從而吸收由流經燈管之 電々IL (或官中電流）所造成的振動。因此，流經燈管122之電流 (或官中電流）所導致的振動幅度極大地被降低。 如第4A圖」與帛4B圖」戶斤示，第一與第二絕膜更包 含不易燃、不導電織物162，具有v〇之安全標準度並且圍繞防音 =包)材料16〇’因為防音(多泡)材料10〇例如聚氨脂泡珠 谷易燃燒。不導電織物透過黏合劑161被鍵合至防音材料。 ❹不導電織物162可根據需要被塗部樹脂層職。樹脂層隐 透過KI塗佈製程被形成，塗佈製程包含塗佈騎（m〇iten) 樹脂材料於不導電織物162上，使用具有浮雕圖案（embossed 轉錄各種浮雕圖案_，以及 烘幹且硬化塗佈區域之材料。透過阳塗部製程，被塗部樹脂層之 •不導電織物變得堅硬，從而更多地改善器處理與操作特性。 這種第m軸包含有高介度長度之不導電 織物圍繞之防音(或多泡)材料，並且吸收流經複數個燈管122之電 201024848 流（或管電流）所造成的振動’並且保護元件避免外部衝擊。 「第5圖」所示係為本揭露第二實施例之液晶顯示裝置之剖 面圖。「第6圖」所示係為「第5圖」之第一平衡印刷電路板、絕 緣膜以及反射板順序地被堆疊之狀態之剖面圖。本揭露第二實施 例之液晶顯示裝置包含與上述第一實施例之液晶顯示裝置相同的 基本配置。因此，將省略本揭露第二實施例之液晶顯示裝置之基 本配置。 如「第5圖」所示，本揭露第二實施例之液晶顯示裝置包含： 防音(或多泡)材料之反射板232，被放置於底蓋126之内表面處； 以及第一與第二平衡印刷電路板124a與124b，各自放置於反射板 232之左右邊緣處。防音(或多泡)材料之反射板232可由υχζΐ形 成。反射板232用於有效地分散液晶顯示裝置之内側上之光線， 但是它可以透過發泡製程被形成。這樣’反射板232可額外地完 成聲音吸收功能。 液晶顯示裝置更包含防音（或多泡）材料之第一左絕緣膜 228a ’放置於第一平衡印刷電路板124a與反射板232之間，以及 防音(或多泡)材料之第一右絕緣膜228b，放置於第二平衡印刷電 路板124b與反射板232之間。絕緣膜（即，左絕緣膜22如蛊 絕緣膜228b)由聚對苯二甲酸乙二酯（pET)與聚碳酸醋（pc) 任意其一形成。或者，絕緣膜可由上述之防音(或多泡)材料例如聚 絕緣臈228被圍繞具 氨基甲酸醋泡沫或poron形成。這種情況下， 201024848 有vo安全標準度之不易燃、不導電織物’這是因為例如聚氨基曱 酸酯泡沫或poron等防音(或多泡)材料容易燃燒。不導電織物透過 黏合劑被鍵合至防音（防音）材料。這種絕緣膜包含防音(或多泡) 材料，被圍繞具有高介電強度之不導電織物，並且吸收流經複數 個燈管122之電流（或管電流）所造成的振動，以及保護元件避 免外部衝擊。 換言之，防音（或多泡）材料之反射板232被放置於底蓋126 ® 之内表面上，絕緣膜（即，左絕緣膜228a與右絕緣膜228b)形成 於反射板上，第一與第二平衡印刷電路板124a與124b被放置於 絕緣膜（更特別地，左絕緣膜228a與右絕緣膜228b)之上。堆疊 結構允許空氣層形成於第一與第二平衡印刷電路板124a與124b 與絕緣膜（即，左絕緣膜228a與右絕緣膜228b)之間，另一空氣 層將被形成於絕緣膜與防音（或多泡）材料之反射板232之間， 如「第6圖」所示。此外，再另一空氣層形成於防音（或多泡） 參 材料之反射板232與底蓋126之間。 第一與第二平衡印刷電路板124a與124b與底蓋126之間放 置的若干層結構建立第一與第二平衡印刷電路板124a與124b與 底蓋126之間的空氣層，這樣空氣層吸收流經燈管122之電流所 造成的部分振動。這樣，透過第一與第二平衡印刷電路板124a與 124b被傳送至底蓋126之振動極大地被降低。此外，反射板232 用於吸收流經燈管122之電流所造成的部分振動，從而減少透過 15 201024848 第一與第二平衡印刷電路板124a與124b被傳送至底蓋126之更 多振動。 第7圖」所示係為本揭露實施例與習知技術之液晶顯示裝 置中產生之振動之測量資料表。「第7圖」所示之資料表示當驅動 電壓依照不同位準被應用時，從本揭露第一與第二實施例以及習 知技術之液晶顯示裝置中五次測量之雜訊大小（或數值）（册）。 在第一試驗中，其中具有“〇伏特，’與3〇%工作比（dutyratio) 之驅動電壓被應用至燈管，從習知技術液晶顯示裝置中測量 23.0dB之雜訊值，而從第一實施例之液晶顯示裝置中測量181dB 之雜訊值，從第二實施例之液晶顯示裝置中測量l78dB之雜訊 值。與習知技術液晶顯示裝置相比，第一實施例之液晶顯示裝置 降低大約4.9dB之雜訊’與習知技術液晶顯示裝置相比，第二實 施例之液晶顯示裝置降低大約5.2dB之雜訊。 當0伏特與30%工作比之驅動電壓被應用至燈管122時，請 參考此時測量的第五次雜訊資料，習知技術液晶顯示裝置產生大 約23.0dB之雜訊，第一實施例之液晶顯示裝置產生大約18 2dB 之雜訊，第二實施例之液晶顯示裝置產生大約17.ldB之雜訊。換 言之，與習知技術液晶顯示裝置相比，第一實施例之液晶顯示裝 置降低大約4.8dB之雜訊，第二實施例之液晶顯示裝置降低大約 5.9dB之雜訊。 在第一試驗中，其中具有“1.65伏特，，與70%工作比之驅動電 201024848 壓被應用至燈管，從習知技術液晶顯示裝置中測量到大約19.4dB 之雜訊值’而從第一實施例之液晶顯示裝置中測量大約18.5dB之 雜訊值’從第二實施例之液晶顯示裝置中測量大約17.〇dB之雜訊 值。因此’與習知技術液晶顯示裝置相比，第一實施例之液晶顯 示裝置降低大約0.9dB之雜訊，與習知技術液晶顯示裝置相比， 第二實施例之液晶顯示裝置降低大約2.4dB之雜訊。 當1.65伏特與70%工作比之驅動電壓被應用至燈管122時， ® 從測量的第五次雜訊資料可看出，習知技術液晶顯示裝置產生大 約20.7dB之雜訊’第一實施例之液晶顯示裝置產生大約18.8dB 之雜訊’第二實施例之液晶顯示裝置產生大約17.1dB之雜訊。換 言之，與習知技術液晶顯示裝置相比，第一實施例之液晶顯示裝 置降低大約1.9dB之雜訊，第二實施例之液晶顯示裝置降低大約 3.6dB之雜訊。 這些測量資料表明與習知技術液晶顯示裝置相比第一與第二 ❷ 實施例之液晶顯示裝置能夠降低雜訊數量。雜訊數量被表示為基 本單位“dB” ’並且由方程1計算得到。 【方程1】 dB=\0\〇gx 比較由方程1得到的雜訊值，20dB比10dB大10倍，比OdB 大100倍。此外，30dB比20dB大1〇倍，比〇dB大looo倍。另 17 201024848 外，100dB的聲音比OdB聲音大百億（ten billion)倍。實際上， 如果聲音從OdB放大到ldB，人類感覺的聲音大小變得至少一倍 大，或者準確的說1.26倍大。 _ 根據測量之圖式，與習知技術液晶顯示裝置相比，第一與第 二實施例之液晶顯示裝置降低至少〇.9dB之雜訊。因此，與相對 的液晶顯示裝置不同’第一與第二實施例之液晶顯示裝置可最小 化流經燈管之電流之振動所造成的雜訊。 如上所述’本揭露實施例之液晶顯示裝置包含至少兩層絕緣 € 膜或者一層絕緣膜與一個防音（或多泡）材料之反射板於底蓋與 平衡印刷電路板之間。因此，液晶顯示裝置可極大地降低流經燈 管之電流之振動所造成的雜訊(胆）。 此外，即使由於液晶顯示裝置變薄導致複數個燈管與平衡印 刷電路板之間的距離減少，本揭露第一與第二實施例之液晶顯示 裝置中包含的每一絕緣膜吸收流經燈管之電流所造成的部分振 動。這樣’第-與第二實施例之液晶顯示裝置可減少振動造成的 雜訊。 雖然本發明以前述之實施例揭露如上，然其並義以限定本 發明。在不脫離本發明之精神和範圍内，所為之更動與潤飾，均 屬本發明之專祕圍。_本發騎界定之舰範_參考 所附之申請專利範圍。 【圖式簡單說明】 18 201024848 視圖； 第1圖所示係為本揭露第—實施例之液晶顯置之展門透 面圖； 第2圖所示係為第1圖所示之液晶顯示裝置之調變狀 態之剖 第3圖所示係為第2圖所示第一平衡印刷電路板與第一與第 絕緣膜依照順序堆疊之狀態之剖面圖； ©意圖； 第4Α圖所示係為第3圖所示之第一與第二絕緣膜之詳細示 第4Β圖所示為沿第4Α圖所示之I〜I，之剖面圖； 第5圖所不係為依照本揭露第二實施例之液晶顯示裝置之剖 面圖； 第6圖所示係為第5圖之第一平衡印刷電路板、絕緣膜以及 反射板依照順序堆疊之狀態之剖面圖；以及 第7圖所示係為本揭露實施例與習知技術之液晶顯示裝置產 生之振動之測量資料表。 【主要元件符號說明】 101 103 上基板 下基板 110 111a 111b 液晶面板 第一印刷電路板 第二印刷電路板 201024848 112 ...........................導光面板 114 ...........................光學片 116 ...........................支撐侧塊 120 ...........................背光單元 122 ...........................燈管 124a...........................第一平衡印刷電路板 124b...........................第二平衡印刷電路板 126 ...........................底蓋 128a...........................第一左絕緣膜 128b...........................第一右絕緣膜 130a...........................第二左絕緣膜 130b...........................第二右絕緣膜 132 ...........................反射板 134 ...........................燈管插座 140 ...........................頂殼 160 ...........................防音(多泡)材料 161 ...........................黏合劑 162 ...........................不導電織物 162a...........................樹脂層 162b...........................浮雕圖案 228a...........................第一左絕緣膜 201024848 228b...........................第一右絕緣膜 232 ...........................反射板BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device suitable for use in minimizing noise caused by vibration of a current flowing through a lamp. [Prior Art] With the advancement of the information age, display devices that visually display a large amount of information on the basis of a telecommunication signal have been rapidly developed. Therefore, flat display devices having excellent performance such as light weight, thin pattern, and low power consumption have been widely distributed. The plane @ display device includes a liquid crystal display device, a plasma display device, a field emission display device, an electroluminescence display device, and the like. These conventional cathode ray tubes are quickly replaced by flat display devices. In order to form an image (or image), the liquid crystal display device receives the light required to form an image (or image) because the liquid crystal display device cannot emit their own light. In other words, the liquid crystal display device is a receiving type device. Therefore, the liquid crystal display device must include a separate light source, such as a backlight unit. The placement of the © backlight unit used in the liquid crystal display device is divided into a direct type or a side light type. The direct-lit backlight unit 70 includes a plurality of fluorescent tubes, the lake is on a plane below the liquid crystal panel, and the edge-lit backlight unit includes a glory lamp placed on one side of the light guide panel. More particularly, the edge-lit backlight unit includes a light guide panel for guiding light and a tube portion placed on the side surface of the godet. The lamp section contains a light-emitting tube, 4 201024848 is installed to receive and protect the lamp holder at both ends of the tube, and a reflector surrounding the outer circumferential surface of the tube. One side surface of the reflecting plate is inserted into one side surface of the light guiding panel. The reflector guides the light panel to reflect the light emitted by the tube. This side-lit backlight unit is mainly used in a relatively small-sized liquid crystal display device, and a small-sized liquid crystal display device is applied to a monitor of a laptop and a desktop computer. The edge-lit backlight unit has a uniform light distribution and a long life of the internal components, and allows the liquid crystal display device to be thinner. The development of the direct type backlight unit starts from the amplification of the liquid crystal display device. The direct type backlight unit includes a plurality of lamps arranged below the diffusion plate to directly illuminate the entire surface of the liquid crystal panel. Thus, the direct type backlight unit has higher luminous efficiency than the edge type backlight unit. In view of this, the direct type backlight unit is mainly used in a large-sized liquid crystal display device requiring high-order brightness. In the meantime, the direct-lit backlight unit contains a very light bulb. Large size monitors or televisions with a direct-thumb type backlight unit (4) display device have a longer life than a laptop. For these reasons, the direct-lit backlight unit _light-type backlight unit is more ridiculous, and may not work due to the end of the life of some of the lamps. In fact, the direct type backlight unit applied to the liquid crystal display device includes: a plurality of glory tubes arranged in an inner space (or a chamber) of the upper and lower frames; the reflection plate is placed under the plurality of fluorescent tubes and It is used to reflect light; and the optical sheet is placed above the complex brain and the secret ship and (10) a plurality of fluorescent lights. A plurality of fluorescent tubes are inserted into the fixed group 5 201024848 on the balanced printed circuit board and placed in the bottom cover. The insulating layer formed between the balanced printed circuit board and the bottom cover is insulated from each other. When a plurality of fluorescent tubes generate light using currents corresponding to respective lamp driving voltages, the current flowing through the fluorescent tubes causes vibrations. This vibration is transmitted to the balanced printed circuit board. The transmitted vibration reaches the bottom cover and is reduced to a very slight extent by the insulating layer. However, as the liquid crystal display device is gradually thinned, the thickness of the insulating layer is also lowered. Thus, the distance between the balanced printed circuit board and the bottom cover is lowered. In addition, the __ of several fluorescent tubes to balance the printed board is also reduced. For these reasons, the vibration caused by the current flowing through the plurality of fluorescent tubes is greatly increased as compared with the vibration of the conventional technique, and noise may be generated on the entire surface of the bottom cover. SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a liquid crystal display device which substantially avoids the problems caused by the disadvantages and disadvantages of the prior art. The purpose of this month is to provide a liquid crystal display device comprising: a plurality of insulating layers formed between the flat printed circuit board and the bottom cover, and formed on the balanced printed circuit board and the plurality of insulating layers and the bottom cover The air layer between them minimizes the noise caused by the vibration of the current flowing through the plurality of fluorescent tubes. Other features and gammas of the embodiments will be partially broadened in the following text. =, and other features and advantages of the present invention will be apparent to those skilled in the art from the following description of the invention. It can be understood or can be derived from the practice of this publication 201024848. The advantages of the present invention can be realized and obtained by the structure specified in the specification and the appended claims. According to a general aspect of the embodiments, a liquid crystal display device includes: a liquid crystal panel; the backlight unit includes a plurality of lamps arranged on a rear surface of the liquid crystal panel, and a plurality of optical sheets for applying light emitted from the plurality of lamps to the liquid crystal a bottom cover for receiving the liquid crystal panel and the backlight unit; the first and second balanced printed circuit boards, each of which is disposed at the left and right edges of the inner side of the bottom cover, each for receiving a plurality of ends of the lamp a lamp socket; a first insulating film; a second insulating film disposed between the bottom cover and the first and second balanced printed circuit boards, the first insulating film being placed on the first and second balanced printed circuit boards Between the second insulating films, at least two air layers are formed between the balanced printed circuit board and the second insulating film. According to another aspect of the embodiment, a liquid crystal display device includes: a liquid crystal panel; a backlight unit including a plurality of lamps arranged on a rear surface of the liquid crystal panel, and a plurality of optical sheets for applying light emitted by the plurality of lamps a liquid crystal panel; a bottom cover for receiving the liquid crystal panel and the backlight unit; the first and second balanced printed circuit boards are respectively placed at the left and right edges of the inner side of the bottom cover, each of which is configured to receive a plurality of ends of the lamp a lamp socket; a reflector for soundproofing material placed on the inner side of the bottom cover and used to reflect light emitted from the plurality of lamps to the optical sheet; and an insulating film placed on the bottom cover and the first and second The printed circuit boards are balanced and formed relative to the first and second balanced printed circuit boards, wherein at least two air layers are formed between the first and second balanced printed circuit boards and the reflectors of 201024848. Other systems, methods, features, and advantages will be apparent to those skilled in the <RTIgt; All of these secrets, methods, features, and advantages will be included in the description of the present invention, and are subject to the scope of the present invention. The contents of this section are not considered to be the scope of these patent applications. The following combines the implementation of other aspects and advantages of the theory. It is to be understood that the general description of the invention as described above and the detailed description of the invention as described hereinafter are intended to be illustrative of the invention and the scope of the invention. [Embodiment] A preferred embodiment of the present invention will now be described in detail in conjunction with the drawings. The embodiments described below are used as examples to convey their spirit to those of ordinary skill in the art. Accordingly, the embodiments are embodied in different shapes and are not limited to the embodiments described herein. Moreover, the size and thickness of the device can be exaggerated for convenience of the drawings. The same reference numbers are used in the present disclosure and the drawings. Fig. 1 is a perspective view showing the liquid crystal display device of the first embodiment of the present invention. Referring to Fig. 1, the liquid crystal display device of the first embodiment includes a liquid crystal panel 110 and first and second printed circuit boards Ilia and 111b. The liquid crystal panel 110 includes upper and lower substrates with a liquid crystal layer interposed therebetween. On the upper substrate and the lower substrate, electrodes for generating an electric field are formed opposite to each other. The first and second printed circuit boards 111a, 201024848 and 111b are connected to the liquid crystal panel 110, and the scanning signal and the data signal are applied to the gate lines and the data lines formed on the lower substrate. A gate driver for supplying a scan signal to the gate line is mounted on the first printed circuit board Ilia. A data driver for supplying data to the data line is mounted on the second printed circuit board 111b. The liquid crystal display device further includes a backlight unit 120 which is placed on the rear surface of the liquid crystal panel 110 and applies light to the liquid crystal panel 11 (). The backlight unit 120 is of a direct type. Thus, the backlight unit 12A includes a plurality of lamps 122 and a plurality of optical sheets 114. The lamps 122 are arranged in parallel with each other at a fixed interval. The optical sheet 114 is stacked above the tube 122 and diffuses the light emitted by the tube 122 to improve the viewing angle. This liquid crystal display device is modulated into a light guide panel 112, a bottom cover 126, a top case 140, and a plurality of combined members (not shown). The light guide panel 112 has a rectangular edge shape surrounding the liquid crystal panel 11 and the backlight unit 12A. The bottom cover 126 supports the side and the rear of the backlight unit 120. The top case 140 is formed in a rectangular edge shape, surrounds the edge of the front (or upper) surface of the liquid crystal panel 110, and is combined with the light guide panel 112. A plurality of combination members combine the light guide panel 112, the bottom cover 126, and the top case 140. To explain the combined configuration of the lamps 122 in the backlight unit 120, one end of the plurality of tubes 122 is fastened to a first balanced printed circuit board (B-PCB) 124a, and the other end of the plurality of tubes 122 It is fastened to the second balanced printed circuit board 124b. The first and second balanced printed circuit boards 124a and 12 are covered by a 201024848 support sider 116. The support side blocks 116 are combined with the side edges of the bottom cover 126 supporting the rear portion and the side surfaces of the backlight unit 120, respectively. The reflector 132 is placed on the inside of the bottom cover. The reflector 132 is used to reflect the light emitted by the plurality of tubes 122 and to apply reflected light to the plurality of optical sheets 114. Further, a third printed circuit board (not shown) is placed on the rear surface of the bottom cover 126. The third printed circuit board includes an inverter (not shown) for applying the lamp driving voltage to the plurality of lamps 122. The first and second balanced printed circuit boards 124a and 124b each include a lamp socket 134. The lamp socket 134 is arranged in a row along the respective longitudinal directions of the first and second balanced printed circuit boards 124a and 124b, and is fastened to the first and second balanced printed circuit boards 124a and 124b by soldering. Both ends of each of the tubes 122 are inserted into the lamp socket 134. The first insulating film and the second insulating film are provided opposite to the first and second balanced printed circuit boards 124a and 124b, wherein the first and second balanced printed circuit boards 124a and 124b are placed on the left/right side of the bottom cover 126 On the edge. The first insulating film and the second insulating film are stacked between the bottom cover 126 and the first and second balanced printed circuit boards 124a and 124b' and form a stacked layer. In other words, the first insulating film is located between the first and second balanced printed circuit boards 124a and 124b and the second insulating film, and the second insulating film is located between the first insulating film and the bottom cover 126. Further, the first insulating film and the second insulating film are formed of a material containing polyethylene terephthalate (PET) or polycarbonate (PC). More specifically, the first insulating film includes a first left insulating film 128a and a first right insulating film 128b, and the second insulating film includes a second left insulating film 13a and a second right insulating film 130b. The first left insulating film 128a is placed between the first balanced printed circuit board i24a and the second left insulating film 130a, and the first right insulating film 28b is placed on the second balanced printed circuit board 124b and the second right insulating film i3. 〇b between. The second left insulating film i3〇a is placed between the first left insulating film 128a and the bottom cover 126, and the second right insulating film 130b is placed between the first right insulating film 128b and the bottom cover 126. Figure 2 is a cross-sectional view showing the modulation state of the liquid crystal display device of "Fig. 1", which is the first balanced printed circuit board of "Fig. 2" and the first A cross-sectional view of a state in which the second insulating film is stacked in order. As shown in "1", "2" and "3", the bottom cover 126 receives the backlight unit ("the backlight unit 120" of the "FIG.") and includes the combined upper substrate 101 and lower substrate 1〇3. The liquid crystal panel 110. The gate lines and the data lines on the substrate 103 under the liquid crystal panel 110 are overlapped with each other, and a halogen region is defined. Thin film transistors (not shown) are formed in the pixel regions, respectively. A pure filter optical sheet opposite to the halogen region is formed smoothly and repeatedly on the upper substrate 101. A polarizing plate (not shown) is bonded to the outer surfaces of the upper substrate and the lower substrate 103. The reflecting plate 132 is joined to the inner surface of the bottom cover 126, and the first and second balanced printed circuit boards 124a and 124b are placed at the left and right side edges of the bottom cover 126. The first left insulating film 128a and the second left insulating film 130a are formed between the bottom cover 126 and the first balanced printed circuit board 124a. Similarly, the first right insulating film 12A and the second right insulating film 2010b are formed between the bottom cover 126 and the second balanced printed circuit board 124b. The total thickness of the first insulating film and the second insulating film is equal to the thickness of the insulating film between the bottom cover and the balanced printed circuit board in the liquid crystal display device of the prior art. Therefore, the second insulating film is placed on the bottom cover 120, the first insulating film is placed on the second insulating film, and the first and second balanced printed circuit boards 124a and 124b are placed on the first insulating film. Thus, an air layer, that is, a first air layer, is provided between the first and second balanced printed circuit boards 124a and 124b and the first insulating film, between the first insulating film and the first insulating film, and the second insulating film and Between the bottom covers 126. In other words, at least two air layers are formed between the first balanced printed circuit board 124a and the bottom cover 126' and at least two air layers are formed between the second balanced printed circuit board (4) and the bottom cover 126. When the current flowing through the bulb 122 on the first and second balanced printed circuit boards 124a and 124b generates vibration 'and this vibration is transmitted to the first and second balanced printed circuit boards 124a and 124b, the 'air layer absorbing portion is transmitted to The first and second balances the vibration of the printed circuit boards 124a and 124b. Therefore, the vibration reaching the bottom cover 126 is greatly reduced. In other words, at least two insulating films placed between the balanced printing t-board and the bottom cover 126 can form at least two air layers, such that an air layer partially located between the insulating films is used for absorbing the balanced printed circuit board and the first The vibration transmitted from the lamp tube 122 to the bottom cover 126 with the second insulating film. Thus, the vibration transmitted from the tube 122 to the bottom cover is greatly reduced. 12 201024848 In this manner, the liquid crystal display device of the first embodiment of the present disclosure includes at least two insulating layers formed between the balanced printed circuit board and the bottom cover 126 and allows at least two air layers to be provided. This air layer absorbs the vibration generated in the bulb 122. Therefore, the vibration transmitted to the bottom cover 126 is greatly reduced. The first and second insulating films are formed of a series of soundproof (or multi-bubble) materials such as polyurethane foam and Poron (impact absorbent material of polyurethane material). Thereby absorbing the vibration caused by the electric current IL (or the current in the official) flowing through the lamp. Therefore, the amplitude of the vibration caused by the current flowing through the tube 122 (or the current in the official) is greatly reduced. As shown in Figure 4A and Figure 4B, the first and second films contain a non-flammable, non-conductive fabric 162, with a safety standard of v〇 and around the soundproofing = package) 16 〇 ' because of soundproofing The (multi-bubble) material 10, for example, the polyurethane bubble bead is easily burned. The non-conductive fabric is bonded to the soundproofing material through the adhesive 161. The non-conductive fabric 162 can be coated with a resin layer as needed. The resin layer is formed by a KI coating process, and the coating process comprises coating a resin material on the non-conductive fabric 162, using an embossed pattern (embossed transcription of various relief patterns _, and drying and hardening coating) The material of the cloth area. Through the galvanic part process, the non-conductive fabric of the resin layer to be coated becomes hard, thereby further improving the processing and operating characteristics of the device. The m-th axis contains a high-medium length non-conducting. The fabric surrounds the soundproof (or multi-bubble) material and absorbs the vibration caused by the electrical flow of the 201024848 (or tube current) flowing through the plurality of tubes 122 and protects the components from external shocks. "Figure 5" shows A cross-sectional view of a liquid crystal display device according to a second embodiment of the present invention is shown in FIG. 6 which is a cross-sectional view showing a state in which the first balanced printed circuit board, the insulating film, and the reflecting plate are sequentially stacked in the "fifth drawing". The liquid crystal display device of the second embodiment includes the same basic configuration as the liquid crystal display device of the first embodiment described above. Therefore, the liquid crystal display device of the second embodiment of the present disclosure will be omitted. The liquid crystal display device of the second embodiment includes: a soundproof (or multi-bubble) material reflective plate 232 placed at the inner surface of the bottom cover 126; and the first And the second balanced printed circuit boards 124a and 124b are respectively placed at the left and right edges of the reflective plate 232. The anti-sound (or multi-bubble) material reflective plate 232 can be formed by a crucible. The reflective plate 232 is used to effectively disperse the inner side of the liquid crystal display device. The light above, but it can be formed through the foaming process. Thus, the 'reflecting plate 232 can additionally perform the sound absorbing function. The liquid crystal display device further includes the first left insulating film 228a of the soundproof (or multi-bubble) material. A first right insulating film 228b between the balanced printed circuit board 124a and the reflective plate 232 and the soundproof (or multi-bubble) material is placed between the second balanced printed circuit board 124b and the reflective plate 232. The insulating film (ie, The left insulating film 22 such as the germanium insulating film 228b) is formed of any one of polyethylene terephthalate (pET) and polycarbonate (pc). Alternatively, the insulating film may be made of the above-mentioned soundproof (or multi-bubble) material such as poly The edge 228 is formed around a urethane foam or poron. In this case, 201024848 has a vo safety standard of non-flammable, non-conductive fabric 'this is because of the soundproofing of polyurethane foam or poron (or more) The foam material is easily burned. The non-conductive fabric is bonded to the soundproof (anti-sound) material through the adhesive. The insulating film contains a soundproof (or multi-bubble) material, is surrounded by a non-conductive fabric having a high dielectric strength, and absorbs the flow. The vibration caused by the current (or tube current) of the plurality of tubes 122 and the protection element avoid external impact. In other words, the anti-sound (or multi-bubble) material reflector 232 is placed on the inner surface of the bottom cover 126 ® , The insulating film (i.e., the left insulating film 228a and the right insulating film 228b) is formed on the reflective plate, and the first and second balanced printed circuit boards 124a and 124b are placed on the insulating film (more specifically, the left insulating film 228a is insulated from the right) Above film 228b). The stacked structure allows an air layer to be formed between the first and second balanced printed circuit boards 124a and 124b and the insulating film (i.e., the left insulating film 228a and the right insulating film 228b), and the other air layer is formed on the insulating film and the soundproofing Between the reflectors 232 of the material (or multi-bubble), as shown in Fig. 6. Further, another air layer is formed between the reflection plate 232 of the soundproof (or multi-bubble) ginseng material and the bottom cover 126. The plurality of layers disposed between the first and second balanced printed circuit boards 124a and 124b and the bottom cover 126 establish an air layer between the first and second balanced printed circuit boards 124a and 124b and the bottom cover 126 such that the air layer absorbs Part of the vibration caused by the current flowing through the tube 122. Thus, the vibration transmitted to the bottom cover 126 through the first and second balanced printed circuit boards 124a and 124b is greatly reduced. In addition, the reflector 232 is adapted to absorb a portion of the vibration caused by the current flowing through the tube 122, thereby reducing more vibration transmitted through the 15 201024848 first and second balanced printed circuit boards 124a and 124b to the bottom cover 126. Fig. 7 is a measurement data sheet for vibration generated in the liquid crystal display device of the embodiment and the prior art. The data shown in Fig. 7 indicates the noise size (or value) measured five times from the liquid crystal display devices of the first and second embodiments and the prior art when the driving voltage is applied according to different levels. )(book). In the first test, a driving voltage having a "〇V," and a 3% duty ratio is applied to the lamp, and a noise value of 23.0 dB is measured from a conventional liquid crystal display device, and In a liquid crystal display device of an embodiment, a noise value of 181 dB is measured, and a noise value of 178 dB is measured from the liquid crystal display device of the second embodiment. Compared with the liquid crystal display device of the prior art, the liquid crystal display device of the first embodiment Reducing noise of about 4.9 dB. Compared with the conventional liquid crystal display device, the liquid crystal display device of the second embodiment reduces noise by about 5.2 dB. When 0 volts and 30% of the driving voltage is applied to the lamp At 122 o'clock, please refer to the fifth noise data measured at this time. The conventional liquid crystal display device generates about 23.0 dB of noise, and the liquid crystal display device of the first embodiment generates about 18 2 dB of noise. The second embodiment The liquid crystal display device generates noise of about 17.ldB. In other words, the liquid crystal display device of the first embodiment reduces noise of about 4.8 dB compared with the liquid crystal display device of the prior art, and the liquid crystal display of the second embodiment The device reduces the noise by about 5.9 dB. In the first test, which has "1.65 volts, the drive power of 201024848 is applied to the lamp with a 70% duty ratio, and about 19.4 is measured from a conventional liquid crystal display device. A noise value of dB' is measured from the liquid crystal display device of the first embodiment by a noise value of about 18.5 dB. A noise value of about 17. 〇 dB is measured from the liquid crystal display device of the second embodiment. Therefore, the liquid crystal display device of the first embodiment reduces noise of about 0.9 dB as compared with the conventional liquid crystal display device, and the liquid crystal display device of the second embodiment is reduced by about 2.4 dB as compared with the conventional liquid crystal display device. The noise. When the driving voltage of 1.65 volts and 70% is applied to the lamp 122, ® can see from the fifth data of the measurement that the conventional liquid crystal display device generates about 20.7 dB of noise. The liquid crystal display device of the example generates about 18.8 dB of noise. The liquid crystal display device of the second embodiment generates about 17.1 dB of noise. In other words, the liquid crystal display device of the first embodiment reduces noise of about 1.9 dB as compared with the conventional liquid crystal display device, and the liquid crystal display device of the second embodiment reduces noise of about 3.6 dB. These measurement data show that the liquid crystal display devices of the first and second embodiments can reduce the amount of noise compared with the conventional liquid crystal display device. The amount of noise is expressed as the basic unit "dB"' and is calculated by Equation 1. [Equation 1] dB=\0\〇gx Compare the noise value obtained by Equation 1, 20dB is 10 times larger than 10dB, and 100 times larger than OdB. In addition, 30dB is 1〇 times larger than 20dB, which is a lot more than 〇dB. Another 17 201024848, 100dB sound is ten billion times more than OdB sound. In fact, if the sound is amplified from OdB to ldB, the size of the human sensed sound becomes at least doubled, or accurately 1.26 times larger. According to the measurement pattern, the liquid crystal display devices of the first and second embodiments reduce the noise of at least 99 dB as compared with the conventional liquid crystal display device. Therefore, unlike the liquid crystal display device of the first embodiment, the liquid crystal display devices of the first and second embodiments can minimize the noise caused by the vibration of the current flowing through the lamp. The liquid crystal display device of the present embodiment as described above comprises at least two layers of an insulating film or an insulating film and a reflection plate of a soundproofing (or multi-bubble) material between the bottom cover and the balanced printed circuit board. Therefore, the liquid crystal display device can greatly reduce the noise (biliary) caused by the vibration of the current flowing through the lamp. In addition, even if the distance between the plurality of lamps and the balanced printed circuit board is reduced due to the thinning of the liquid crystal display device, each of the insulating films included in the liquid crystal display devices of the first and second embodiments is absorbed and flows through the lamps. Part of the vibration caused by the current. Thus, the liquid crystal display devices of the first and second embodiments can reduce noise caused by vibration. Although the present invention has been disclosed above in the foregoing embodiments, it is intended to limit the invention. Modifications and retouchings are all within the spirit and scope of the present invention. _ This is a definition of the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a liquid crystal display of the first embodiment; FIG. 2 is a liquid crystal display device shown in FIG. FIG. 3 is a cross-sectional view showing a state in which the first balanced printed circuit board and the first and second insulating films are sequentially stacked in the second embodiment; FIG. 4 is a view showing a state in which FIG. FIG. 3 is a cross-sectional view taken along line I to I shown in FIG. 4, and FIG. 5 is not a second embodiment in accordance with the present disclosure. A cross-sectional view of a liquid crystal display device of the example; FIG. 6 is a cross-sectional view showing a state in which the first balanced printed circuit board, the insulating film, and the reflecting plate are stacked in order according to FIG. 5; A measurement data sheet of vibrations generated by the liquid crystal display device of the embodiment and the prior art is disclosed. [Main component symbol description] 101 103 Upper substrate Lower substrate 110 111a 111b Liquid crystal panel First printed circuit board Second printed circuit board 201024848 112 ..................... ......Light guide panel 114 ........................... Optical sheet 116 .......... .................Support side block 120 ...........................Backlight unit 122 ...........................Lamp tube 124a................... ........The first balanced printed circuit board 124b.........................the second balanced printed circuit board 126. ..........................Bottom cover 128a..................... ...first left insulating film 128b........................first right insulating film 130a..... ......................Second left insulating film 130b................... ..... second right insulating film 132 ...........................reflecting plate 134 ......... ..................Lamp tube socket 140 ........................... top Shell 160 ........................... Soundproof (multi-bubble) material 161 .............. .............Binder 162 ........................... Non-conductive fabric 162a... ....................... .Resin layer 162b.............................. Embossed pattern 228a................ ...........first left insulating film 201024848 228b...........................first right insulating film 232 ...........................reflector
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