1356237 一1___一 、 ，100年οέ月08自修正替¥頁 六、發明說明： • · Τ - 【發明所屬之技術領域】 [0001] 本發明係關於一種雙屏液晶顯示裝置及採用該雙屏液晶 顯示裝置之筆記型電腦。 【先前技術】 [0002] 因液晶顯示裝置具輕、薄、短小等優點，故廣泛應用於 筆記型電腦、行動電話等現代化資訊設備中。然，傳統 液晶顯示裝置只具單一液晶顯示屏，採用傳統液晶顯示 裝置之筆記型電腦、行動電話等資訊設備閉合後，使用 者無法了解其所需如系統時間、待機時長等訊息。故， 市場上出現一種雙屏液晶顯示裝置，其主要應用於筆記 型電腦、行動電話等資訊設備，當資訊設備閉合後，使 用者仍可藉由雙屏液晶顯示裝置之一顯示屏幕了解相關 訊息。 [0003] 請參閱圖1，係一種先前技術雙屏液晶顯示裝置之側視圖 。該雙屏液晶顯示裝置10包括一顯示驅動電路（圖未示） 及自上而下依次層疊設置之一副顯示面板11、一副背光 模組12、一主背光模組13及一主顯示面板14。該副顯示 面板11之面積小於該主顯示面板14之面積。該副背光模 組12為該副顯示面板11提供平面光。該主背光模組13為 該主顯示面板14提供平面光。該顯示驅動電路用於驅動 該雙屏液晶顯示裝置10。 [0004] 然，因該雙屏液晶顯示裝置1 0具一副背光模組12及一主 背光模組13，故其體積及重量均較大，不能滿足市場對 其輕薄化之要求。 096103218 表單编號Α0101 第4頁/共29頁 1003286222-0 1356237 [0005] 100年.08月08日按正_頁 為解決前述雙屏液晶顯示裝置10體積及重量較大之問題 ，葉界通常採用一種具有單一背光模組之雙，屏液晶顯示 * · ί.· ： 裝置。 [0006] 如圖2所示，係另一種先前技術雙屏液晶顯示裝置之侧視 圖。該雙屏液晶顯示裝置20包括一顯示驅動電路（圖未示 )及自上而下依次層疊設置之一副顯示面板21、一背光模 組22及一主顯示面板24。該副顯示面板21之面積小於該 主顯示面板24之面積。該背光模組22係一側入式背光模 組，分別為該副顯示面板21及該主顯示面板24提供平面 光，其包括一導光板223及複數發光二極體（Light Emitting Diode, LED) 221，該複數發光二極體221 設置於該導光板223之一側。該顯示驅動電路包括一主顯 示面板驅動電路（圖未示）、一副顯示面板驅動電路（圖未 示）及一背光模組驅動電路（圖未示）。該背光模組驅動電 路驅動該背光模組22。該主顯示面板驅動電路及該副顯 示面板驅動電路分別驅動該主顯示面板24及該副顯示面 板21 〇 [0007] 當該主顯示面板24需顯示時，該顯示驅動電路之背光驅 動電路點亮該背光模組22之全部發光二極體221，同時， 該主顯示面板驅動電路為該主顯示面板24提供資料訊號 ，使該主顯示面板21顯示圖像，而該副顯示面板21此時 處於關閉狀態。當該副顯示面板21需顯示時，該顯示驅 動電路之背光驅動電路亦點亮該背光模組22之全部發光 二極體221，同時該副顯示面板驅動電路為該副顯示面板 21提供資料訊號，使該副顯示面板21顯示圖像，而該主 096103218 表單編號A0101 第5頁/共29頁 1003286222-0 1356237 100年οέ月08白修正替&頁 顯示面板24此時處於關閉狀態。 [0008] 惟，由於前述貪晶顯示裝置20之ώ顯示面板21顯示 圖像時，該背光模組22仍需點亮全部發光二極體221，造 成電能之較大浪費。同時，採用該雙屏液晶顯示裝置20 之筆記型電腦之能耗亦較大。 【發明内容】 [0009] 有鑑於此，提供一種較為省電之雙屏液晶顯示裝置實為 必要。 [0010] 另，提供一種較為省電之筆記型電腦亦為必要。 [0011] —種雙屏液晶顯示裝置包括一導光板、複數光源、一第 一顯示面板、一第二顯示面板及一顯示驅動電路。該導 光板包括一入光面及鄰近該入光面之第一出光面與第二 出光面。該複數光源鄰近該入光面。該第一顯示面板鄰 近該第一出光面。該第二顯示面板鄰近該第二出光面。 該顯示驅動電路包括一主系統、一開關電路、一第一驅 動電路以及一第二驅動電路，該開關電路用於控制該主 系統輸出工作電壓之流向，該第一驅動電路與第二驅動 電路分別連接該主系統。當該第二顯示面板需顯示時， 該開關電路控制主系統為第一驅動電路提供工作電壓， 並且該主系統通過該第一驅動電路將顯示所需之資料訊 號輸出至第一顯示面板，第一驅動電路驅動部份光源為 該第一顯示面板提供光，且該開關電路控制該主系統停 止為第二驅動電壓提供工作電壓，該主系統停止輸出該 顯示所需之資料訊號至第二驅動電路。當該第二顯示面 板需顯示時，該顯示驅動電路該開關電路控制該主系統 096103218 表單编號 Α0101 第 6 頁/共 29 頁 1003286222-0 1356237 100年.08月08日修正t«頁 為該第二驅動電路提供工作電壓，並且該主系統通過該 • 第二驅動電路將該顯示所需之資料til.號輪Iti.i至該第二顯 示面板，該第二驅動電路控制驅動全部光源為該第二顯 示面板提供光，且該開關電路控制該主系統停止為第一 驅動電路提供工作電壓，該主系統停止輸出該顯示所需 之資料訊號至第一驅動電路。 [0012] 一種雙屏液晶顯示裝置包括一導光板、一第一光源、一 第二光源、一第一顯示面板、一第二顯示面板及一顯示 驅動電路。該導光板包括一第一入光面、一鄰近該第一 入光面之第一出光面、一第二入光面及一鄰近該第二入 光面之第二出光面。該第一光源鄰近該第一入光面。第 二光源鄰近該第二入光面。第一顯示面板鄰近該第一出 光面。該第二顯示面板鄰近該第二出光面。該顯示驅動 電路包括一主系統、一開關電路、一第一驅動電路以及 一第二驅動電路，該開關電路用於控制該主系統輸出工 作電壓之流向，該第一驅動電路與第二驅動電路分別連 接該主系統。當該第一顯示面板需顯示時，該開關電路 控制該主系統為第一驅動電路提供工作電壓，並且該主 系統通過該第一驅動電路將顯示所需之資料訊號輸出至 第一顯示面板，第一驅動電路驅動該第一光源為該第一 顯示面板提供光，且該開關電路控制該主系統停止為第 二驅動電壓提供工作電壓，該主系統停止輸出該顯示所 需之資料訊號至第二驅動電路。當該第二顯示面板需顯 示時，該開關電路控制該主系統為該第二驅動電路提供 工作電壓，並且該主系統通過該第二驅動電路將該顯示 096103218 表單編號A0101 第7頁/共29頁 1003286222-0 1356237 loo年οέ月od.白核正雜頁 所需之資料訊號輸出至該第二顯示面板，該第二驅動電 1路驅動該第二光源為該第二顯示面板:提供光，且該開關4 電路控制該主系統停止為第一驅動電路提供工作電壓， 該主系統停止輸出該顯示所需之資料訊號至第一驅動電 路。 [0013] 一種筆記型電腦包括一主機、一雙屏液晶顯示裝置及一 轉軸。該轉軸枢接該主機及該雙屏液晶顯示面板。該雙 屏液晶顯示裝置包括一導光板、複數光源、一第一顯示 面板、一第二顯示面板及一顯示驅動電路。該導光板包 括一入光面及鄰近該入光面之第一出光面與第二出光面 。該複數光源鄰近該入光面。該第一顯示面板鄰近該第 一出光面。該第二顯示面板鄰近該第二出光面。該顯示 驅動電路包括一主系統、一開關電路、一第一驅動電路 以及一第二驅動電路，該開關電路用於控制該主系統輸 出工作電壓之流向，該第一驅動電路與第二驅動電路分 別連接該主系統。當該第二顯示面板需顯示時，該開關 電路控制主系統為第一驅動電路提供工作電壓，並且該 主系統通過該第一驅動電路將顯示所需之資料訊號輸出 至第一顯示面板，第一驅動電路驅動部份光源為該第一 顯示面板提供光，且該開關電路控制該主系統停止為第 二驅動電壓提供工作電壓，該主系統停止輸出該顯示所 需之資料訊號至第二驅動電路。當該第二顯示面板需顯 示時，該顯示驅動電路該開關電路控制該主系統為該第 二驅動電路提供工作電壓，並且該主系統通過該第二驅 動電路將該顯示所需之資料訊號輸出至該第二顯示面板 096103218 表單编號A0101 第8頁/共29頁 1003286222-0 1356237 100’年.08月08日按正替換頁 ，該第二驅動電路控制驅動全部光源為該第二顯示面板 提供光乂技該％關電路控制該主系，統停止為第一驅動違-路提供工作電壓，該主系統停止輸出該顯示所需之資料 訊號至第一驅’動電路。 [0014] 一種筆記型電腦包括一主機、一雙屏液晶顯示裝置及一 轉軸。該轉轴樞接該主機及該雙屏液晶顯示面板。雙屏 液晶顯示裝置包括一導光板、一第一光源、一第二光源 、一第一顯示面板、一第二顯示面板及一顯示驅動電路 。該導光板包括一第一入光面、一鄰近該第一入光面之 第一出光面、一第二入光面及一鄰近該第二入光面之第 二出光面。該第一光源鄰近該第一入光面。第二光源鄰 近該第二入光面。第一顯示面板鄰近該第一出光面。該 第二顯示面板鄰近該第二出光面。該顯示驅動電路包括 一主系統、一開關電路、一第一驅動電路以及一第二驅 動電路，該開關電路用於控制該主系統輸出工作電壓之 流向，該第一驅動電路與第二驅動電路分別連接該主系 統。當該第一顯示面板需顯示時，該開關電路控制該主 系統為第一驅動電路提供工作電壓，並且該主系統通過 該第一驅動電路將顯示所需之資料訊號輸出至第一顯示 面板，第一驅動電路驅動該第一光源為該第一顯示面板 提供光，且該開關電路控制該主系統停止為第二驅動電 壓提供工作電壓，該主系統停止輸出該顯示所需之資料 訊號至第二驅動電路。當該第二顯示面板需顯示時，該 開關電路控制該主系統為該第二驅動電路提供工作電壓 ，並且該主系統通過該第二驅動電路將該顯示所需之資 096103218 表單編號Α0101 第9頁/共29頁 1003286222-0 1356237 -----..... i_户丨 . 丨》 100年.οέ月08®梭正替換頁 料訊號輸出至該第二顯示面板，該第二驅動電路驅動該 第立洗源為讀’第二顯示面板提供光，且該開關電路控制 W ， 該主系統停止為第一驅動電路提供工作電壓，該主系統 停止輸出該顯示所需之資料訊號至第一驅動電路。 [0015] 該雙屏液晶顯示裝置之第一顯示面板顯示及第二顯示面 板顯示時，僅需其所對應之光源點亮，為其提供光，其 餘光源不點亮，故該雙屏液晶顯示裝置可節省電能。同 時，採用該雙屏液晶顯示裝置之筆記型電腦亦可節省電 【實施方式】 [0016] 請參閱圖3，係採用本發明雙屏液晶顯示裝置第一實施方 式之筆記型電腦之立體示意圖。該筆記型電腦3包括一雙 屏液晶顯示裝置30、一主機31、一轉軸32及一霍爾開關 33。該主機31與該雙屏液晶顯示裝置30藉由該轉軸32柩 接，該雙屏液晶顯示裝置30可繞該轉軸32於0度~180度 範圍内轉動。該霍爾開關33設置於該雙屏液晶顯示裝置 30靠近轉軸32—侧，其遵循霍爾效應，隨該雙屏液晶顯 示裝置30與該主機31之夾角之變化方向及大小而產生電 能，並輸出相應訊號。 [0017] 請參閱圖4，係圖3所示雙屏液晶顯示裝置30之立體分解 示意圖。該雙屏液晶顯示裝置30包括一顯示驅動電路（圖 未示）及自上而下依次層疊設置之一副顯示面板310、一 背光模組320及一主顯示面板330。該副顯示面板310之 面積小於該主顯示面板330之面積。該背光模組320分別 為該副顯示面板310及該主顯示面板330提供平面光。該 096103218 表單编號Α0101 第10頁/共29頁 1003286222-0 1356237 . ~：~~—.,. - 100年.08月08日孩正替埃頁 顯示驅動電路驅動該雙屏液晶顯示裝置30。 一 * * [〇〇18] 該背ί0ϊΚ32〇係一侧入式背光模組，其包括複數發光二、’ - 極體321及自上而下依次層疊設置之一副光學膜片組325 、一反射片323、一導光板322、一主光學膜片組324。 該導光板322包括一入光面326、一鄰近該入光面326之 副出光面328與一相對該副出光面328之主出光面327。 該複數發光二極體321鄰近該導光板322之入光面326， 其中部份發光二極體321對應於該副顯示面板31〇，該部 份發光二極體321可為該副顯示面板31〇提供充足之光， 其通常對應於該副顯示面板310於該副出光面328之垂直 • 投影。該副光學膜片組325設置於該導光板322之副出光 • 面328與該副顯示面板310間。該反射片323包括一對鹿 該副光學膜片組325之開口 329 ’且該開口 329之面積與 該副光學膜片組325及該副顯示面板3大致相等。該主 光學膜片組324设置於該導光板322之主出光面327與該 主顯示面板330間’其面積與該主顯示面板“ο大致相等 〇 [0019]請參閱圖5 ’係圖3所示雙屏液晶顯示裝置30之顯示驅動 電路之結構框圖。該顯示驅動電路包括_主系統343、一 開關電路344、一第一驅動電路345及一第二驅動電路 346 » —外接電源（圖未示）為該主系統343供電，該主系 統343將該外接電源提供之電壓轉化為該第一驅動電路 345及該第二驅動電路346所需之電壓，並為該第一驅動 電路345及該第二驅動電路346提供資料訊號。該開關電 路344包括一第一通路344丨及一第二通路3α2 ,其受該 096103218 表單編號Α0101 第11頁/共29頁 1003286222-0 1356237 . ‘ __'—― 1〇〇年οέ月'όέ·曰修正替換寊 霍爾開關33之輸出訊號控制而選擇導通通路。當該第一 ’ _通路左4丨4 :導遠時·，該主系統3 4 3為該第一驅動電路3 4 5供‘ ：’ 電並關斷該第二驅動電路346 ;當該第二電路3412導通時 ，該主系統343為該第二驅動電路346供電並關斷該第一 驅動電路345。該第一驅動電路345連接該背光模組320 之全部發光二極體321，該第二驅動電路346連接該副顯 示面板310所對應之部份發光二極體321。 [0020] 當該筆記型電腦3之雙屏液晶顯示裝置30與該主機31間夹 角沿某一方向變化且大於一定預設角度時，如二者之夾 角變大且處於100度〜150度之間時，該霍爾開關33根據 所述夾角變化之方向輸出一控制訊號控制該開關電路344 · 之第一通路3441導通，則該主系統343經由該第一通路 · 3441為該第一驅動電路345供電，而該第一驅動電路345 發出一反饋訊號至該主系統343，該主系統343根據其内 部之程式，經由該第一驅動電路345為該主顯示面板330 提供資料訊號而停止為該第二驅動電路346提供資料訊號 。同時，該第一驅動電路345為該背光模組320之全部發 光二極體321供電，點亮全部發光二極體321。該發光二 極體321發出之光經該導光板322、該反射片323及該主 光學膜片組324之光學作用，為該主顯示面板330提供均 勻之平面光，以使該主顯示面板330正常顯示，此時，由 於該副顯示面板310無資料訊號及電能供應，故其處於關 閉狀態。 [0021] 當該筆記型電腦3之雙屏液晶顯示裝置30與該主機31間夾 角沿某一方向變化小於一定預設角度時，如二者之夾角 096103218 表單编號A0101 第12頁/共29頁 1003286222-0 1356237 小於30度時，該霍爾開關33根據夹角 100年0?月08日 變化方向輸出另一 修正 控制訊號使該開補:電路344之第二通路3442導通’則該主 系統343經由該第二通路3442為該第二驅動電路—供電 ’而該第二驱動電路346發出另_反饋訊號至該主系統 343，該主系統343根據其内部之程式控制經由該第二 驅動電路346為該副顯示面板31G提供資料訊號而停止為 該主顯示面板33G提供資料訊同時，該第二驅動電路 346為該副顯示面板310對應之部份發光二極體供電 ，使部份發光二極體321發光。該部份發光二極體奶發 出之光經該導光板322、該第二光學膜片組325之光學作 用，使該副顯示面板3H正常顯示。而該主顯示面板33〇 因無資料城及電祕應，故其處於關閉狀態。 [0022] 相較於先前技術，前述雙屏液晶顯示裝置3()藉由霍爾開 關33之訊號，根據該主顯示面板33Q與該副顯示面板31〇 之顯示需求’控制部份或全部發光二極體32ι應需點亮， 而非-直全亮’從而収顯示需求時亦節約電能並延 長部份發光二極體321之工作壽命。 [0023] 清參閱圖6，係採用本發明雙屏液晶顯示I置第二實施方 式之立體分解結構示意圖。該雙屏液晶顯示裝置4〇包括 一副顯示面板410、-背光模組42〇及一主顯示面板43〇 。該雙屏液晶顯示裝置4〇與該雙屏液晶顯示裝置㈣基本 相同，其區別在於：該背光模組420包括一主燈管412、 一副燈管413及自上而下依次μ設置之 一射⑽、一導光板働一主光學：： 。該導光板422包括-主人光面4G2、1近該主入光面 096103218 表單編號A〇101 第13頁/共29頁 1003286222-0 1356237 loo年〇έ月叫a i修正替換頁 402之主出光面4 27、一相對該主入光面402之副入光面 3及一鄰近該副公.光面403且相對該主出光面427之副 出光面428。該主燈管412係冷陰極螢光燈（Cold Cath-ode Florescent Lamp，CCFL)，其鄰近該主入光面 402，為該主顯示面板430提供光。該副燈管413亦為冷 陰極螢光燈，其鄰近該副入光面403，為該副顯示面板 410提供光。該副燈管41 3之功率小於該主燈管41 2之功 率，且該副燈管413之長度小於該主燈管412之長度，其 通常與該副顯示面板410於該副出光面428之垂直投影之 長度相等。 [0024] 相較先前技術，該雙屏液晶顯示裝置40之顯示驅動電路（ 圖未示）接收霍爾開關之訊號，且根據該主顯示面板410 及該副顯示面板430之顯示需求，控制該主燈管412或該 副燈管413分別點亮，從而達到省電之目的。 [0025] 前述雙屏液晶顯示裝置30及雙屏液晶顯示裝置40不僅適 用於筆記型電腦之顯示裝置，其亦可用於行動電話、個 人數位助理等現代資訊設備中。 [0026] 综上所述，本發明符合發明專利要件，爰依法提出專利 申請。惟，以上所述者僅為本發明之較佳實施例，舉凡 熟悉本案技藝之人士，在援依本案創作精神所作之等效 修飾或變化，皆應包含於以下之申請專利範圍内。 【圖式簡單說明】 [0027] 圖1係一種先前技術雙屏液晶顯示裝置之側視圖。 [0028] 圖2係另一種先前技術雙屏液晶顯示裝置之側視圖。 096103218 表單编號A0101 第14頁/共29頁 1003286222-01356237一1___一,,100年οέ月08自改改¥页六, invention description: • Τ - [Technical field of invention] [0001] The present invention relates to a dual-screen liquid crystal display device and the use of the pair A notebook computer with a screen LCD display device. [Prior Art] [0002] Since liquid crystal display devices are light, thin, and short, they are widely used in modern information devices such as notebook computers and mobile phones. However, the conventional liquid crystal display device has only a single liquid crystal display, and after the information device such as a notebook computer or a mobile phone of the conventional liquid crystal display device is closed, the user cannot understand the information such as the system time and the standby time. Therefore, there is a dual-screen liquid crystal display device on the market, which is mainly used in information devices such as notebook computers and mobile phones. When the information device is closed, the user can still display related information through one of the dual-screen liquid crystal display devices. . Please refer to FIG. 1, which is a side view of a prior art dual screen liquid crystal display device. The dual-screen liquid crystal display device 10 includes a display driving circuit (not shown) and a sub-display panel 11 , a sub-backlight module 12 , a main backlight module 13 and a main display panel stacked in this order from top to bottom. 14. The area of the sub display panel 11 is smaller than the area of the main display panel 14. The sub backlight module 12 supplies planar light to the sub display panel 11. The main backlight module 13 provides planar light to the main display panel 14. The display driving circuit is for driving the dual screen liquid crystal display device 10. [0004] However, since the dual-screen liquid crystal display device 10 has a pair of backlight modules 12 and a main backlight module 13, the volume and weight thereof are large, which cannot meet the requirements of the market for thinning and thinning. 096103218 Form No. 1010101 Page 4/Total 29 Page 1003286222-0 1356237 [0005] 100 years. August 08th, according to the positive page, to solve the problem of the volume and weight of the above-mentioned dual-screen liquid crystal display device 10, the leaf boundary usually A dual, on-screen liquid crystal display with a single backlight module* · ί.. : device. 2 is a side elevational view of another prior art dual screen liquid crystal display device. The dual-screen liquid crystal display device 20 includes a display driving circuit (not shown) and a sub-display panel 21, a backlight module 22 and a main display panel 24 stacked in this order from top to bottom. The area of the sub display panel 21 is smaller than the area of the main display panel 24. The backlight module 22 is a side-lit backlight module that provides planar light to the sub-display panel 21 and the main display panel 24, and includes a light guide plate 223 and a plurality of light emitting diodes (LEDs). 221. The plurality of LEDs 221 are disposed on one side of the light guide plate 223. The display driving circuit comprises a main display panel driving circuit (not shown), a sub display panel driving circuit (not shown) and a backlight module driving circuit (not shown). The backlight module driving circuit drives the backlight module 22. The main display panel driving circuit and the sub display panel driving circuit respectively drive the main display panel 24 and the sub display panel 21. [0007] When the main display panel 24 is to be displayed, the backlight driving circuit of the display driving circuit is lit. All of the LEDs 221 of the backlight module 22, at the same time, the main display panel driving circuit provides a data signal to the main display panel 24, so that the main display panel 21 displays an image, and the sub display panel 21 is at this time Disabled. When the sub-display panel 21 is to be displayed, the backlight driving circuit of the display driving circuit also illuminates all the LEDs 221 of the backlight module 22, and the sub-display panel driving circuit provides the sub-display panel 21 with the data signal. The sub display panel 21 is caused to display an image, and the main 096103218 form number A0101 page 5 / 29 pages 1003286222-0 1356237 100 years οέ month 08 white correction & page display panel 24 is now closed. [0008] However, when the display panel 21 of the crystal display device 20 displays an image, the backlight module 22 still needs to illuminate all of the light-emitting diodes 221, resulting in a large waste of electrical energy. At the same time, the energy consumption of the notebook computer using the dual-screen liquid crystal display device 20 is also large. SUMMARY OF THE INVENTION [0009] In view of the above, it is necessary to provide a relatively power-saving dual-screen liquid crystal display device. [0010] In addition, it is also necessary to provide a more power-saving notebook computer. [0011] A dual-screen liquid crystal display device includes a light guide plate, a plurality of light sources, a first display panel, a second display panel, and a display driving circuit. The light guide plate includes a light incident surface and a first light emitting surface and a second light emitting surface adjacent to the light incident surface. The plurality of light sources are adjacent to the light incident surface. The first display panel is adjacent to the first light emitting surface. The second display panel is adjacent to the second light emitting surface. The display driving circuit includes a main system, a switching circuit, a first driving circuit and a second driving circuit, wherein the switching circuit is configured to control a flow direction of the output voltage of the main system, the first driving circuit and the second driving circuit Connect to the main system separately. When the second display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the first driving circuit, and the main system outputs the required data signal to the first display panel through the first driving circuit, a driving circuit drives a part of the light source to provide light to the first display panel, and the switching circuit controls the main system to stop providing an operating voltage for the second driving voltage, and the main system stops outputting the data signal required for the display to the second driving Circuit. When the second display panel is to be displayed, the display drive circuit controls the main system 096103218 Form No. 1010101 Page 6 of 29 1003286222-0 1356237 100. 08/08 Revision t« page for The second driving circuit provides an operating voltage, and the main system passes the second driving circuit to display the required data til. wheel Iti.i to the second display panel, and the second driving circuit controls to drive all the light sources to The second display panel provides light, and the switch circuit controls the main system to stop providing an operating voltage to the first driving circuit, and the main system stops outputting the data signal required for the display to the first driving circuit. [0012] A dual-screen liquid crystal display device includes a light guide plate, a first light source, a second light source, a first display panel, a second display panel, and a display driving circuit. The light guide plate includes a first light incident surface, a first light emitting surface adjacent to the first light incident surface, a second light incident surface, and a second light emitting surface adjacent to the second light incident surface. The first light source is adjacent to the first light incident surface. The second light source is adjacent to the second light incident surface. The first display panel is adjacent to the first light emitting surface. The second display panel is adjacent to the second light emitting surface. The display driving circuit includes a main system, a switching circuit, a first driving circuit and a second driving circuit, wherein the switching circuit is configured to control a flow direction of the output voltage of the main system, the first driving circuit and the second driving circuit Connect to the main system separately. When the first display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the first driving circuit, and the main system outputs the data signal required for display to the first display panel through the first driving circuit. The first driving circuit drives the first light source to supply light to the first display panel, and the switching circuit controls the main system to stop providing an operating voltage for the second driving voltage, and the main system stops outputting the data signal required for the display to the first Two drive circuits. When the second display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the second driving circuit, and the main system displays the display 096103218 form number A0101 through the second driving circuit. Page 1003286222-0 1356237 loo year οέ month od. The information signal required for the white core positive page is output to the second display panel, and the second driving circuit 1 drives the second light source to the second display panel: providing light And the switch 4 circuit controls the main system to stop supplying the working voltage to the first driving circuit, and the main system stops outputting the data signal required for the display to the first driving circuit. [0013] A notebook computer includes a main body, a dual screen liquid crystal display device, and a rotating shaft. The rotating shaft pivotally connects the host and the dual-screen liquid crystal display panel. The dual-screen liquid crystal display device comprises a light guide plate, a plurality of light sources, a first display panel, a second display panel and a display driving circuit. The light guide plate includes a light incident surface and a first light emitting surface and a second light emitting surface adjacent to the light incident surface. The plurality of light sources are adjacent to the light incident surface. The first display panel is adjacent to the first light exiting surface. The second display panel is adjacent to the second light emitting surface. The display driving circuit includes a main system, a switching circuit, a first driving circuit and a second driving circuit, wherein the switching circuit is configured to control a flow direction of the output voltage of the main system, the first driving circuit and the second driving circuit Connect to the main system separately. When the second display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the first driving circuit, and the main system outputs the required data signal to the first display panel through the first driving circuit, a driving circuit drives a part of the light source to provide light to the first display panel, and the switching circuit controls the main system to stop providing an operating voltage for the second driving voltage, and the main system stops outputting the data signal required for the display to the second driving Circuit. When the second display panel is to be displayed, the display driving circuit controls the main system to provide an operating voltage for the second driving circuit, and the main system outputs the data signal required for display by the second driving circuit To the second display panel 096103218 Form No. A0101 Page 8 / 29 pages 1003286222-0 1356237 100' year. August 08, according to the replacement page, the second driving circuit controls to drive all the light sources to the second display panel Providing the optical technology, the % off circuit controls the main system, and the system stops supplying the working voltage for the first driving violation, and the main system stops outputting the data signal required for the display to the first driving circuit. [0014] A notebook computer includes a main unit, a dual screen liquid crystal display device, and a rotating shaft. The rotating shaft pivotally connects the host and the dual-screen liquid crystal display panel. The dual-screen liquid crystal display device comprises a light guide plate, a first light source, a second light source, a first display panel, a second display panel and a display driving circuit. The light guide plate includes a first light incident surface, a first light emitting surface adjacent to the first light incident surface, a second light incident surface, and a second light emitting surface adjacent to the second light incident surface. The first light source is adjacent to the first light incident surface. The second light source is adjacent to the second light incident surface. The first display panel is adjacent to the first light emitting surface. The second display panel is adjacent to the second light emitting surface. The display driving circuit includes a main system, a switching circuit, a first driving circuit and a second driving circuit, wherein the switching circuit is configured to control a flow direction of the output voltage of the main system, the first driving circuit and the second driving circuit Connect to the main system separately. When the first display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the first driving circuit, and the main system outputs the data signal required for display to the first display panel through the first driving circuit. The first driving circuit drives the first light source to supply light to the first display panel, and the switching circuit controls the main system to stop providing an operating voltage for the second driving voltage, and the main system stops outputting the data signal required for the display to the first Two drive circuits. When the second display panel is to be displayed, the switch circuit controls the main system to provide an operating voltage for the second driving circuit, and the main system passes the display of the required 096103218 form number Α0101 by the second driving circuit. Page / Total 29 pages 1003286222-0 1356237 -----... i_户丨. 丨" 100 years. οέ月08® Shuttle is replacing the page signal output to the second display panel, the second The driving circuit drives the first source to provide light for reading the second display panel, and the switch circuit controls W, the main system stops supplying the working voltage to the first driving circuit, and the main system stops outputting the data signal required for the display To the first drive circuit. [0015] When the first display panel display and the second display panel of the dual-screen liquid crystal display device are displayed, only the corresponding light source needs to be lighted to provide light, and the remaining light sources are not lit, so the dual-screen liquid crystal display The device saves energy. At the same time, the notebook computer using the dual-screen liquid crystal display device can also save electricity. [Embodiment] Referring to Figure 3, there is shown a perspective view of a notebook computer using the first embodiment of the dual-screen liquid crystal display device of the present invention. The notebook computer 3 includes a dual screen liquid crystal display device 30, a main unit 31, a rotating shaft 32, and a Hall switch 33. The mainframe 31 and the dual-screen liquid crystal display device 30 are connected by the rotating shaft 32. The dual-screen liquid crystal display device 30 can rotate around the rotating shaft 32 within a range of 0 to 180 degrees. The Hall switch 33 is disposed on the side of the dual-screen liquid crystal display device 30 near the rotating shaft 32, and follows the Hall effect, and generates electric energy according to the direction and magnitude of the change between the angle between the dual-screen liquid crystal display device 30 and the host computer 31, and Output the corresponding signal. Please refer to FIG. 4, which is a perspective exploded view of the dual-screen liquid crystal display device 30 shown in FIG. The dual-screen liquid crystal display device 30 includes a display driving circuit (not shown) and a sub-display panel 310, a backlight module 320 and a main display panel 330 stacked in this order from top to bottom. The area of the sub display panel 310 is smaller than the area of the main display panel 330. The backlight module 320 provides planar light to the sub display panel 310 and the main display panel 330, respectively. The 096103218 Form No. 1010101 Page 10 / Total 29 Page 1003286222-0 1356237 . ~:~~—.,. - 100 years. On August 08, the child is driving the display circuit to drive the dual-screen liquid crystal display device 30. . a * * [〇〇 18] the back ί ϊΚ 〇 〇 〇 一侧 一侧 一侧 , , , , , , , , 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧 一侧The reflective sheet 323, a light guide plate 322, and a main optical film group 324. The light guide plate 322 includes a light incident surface 326, a sub-light-emitting surface 328 adjacent to the light-incident surface 326, and a main light-emitting surface 327 opposite to the sub-light-emitting surface 328. The plurality of light-emitting diodes 321 are adjacent to the light-incident surface 326 of the light guide plate 322 , and the partial light-emitting diodes 321 are corresponding to the sub-display panel 31 , and the partial light-emitting diodes 321 can be the sub-display panel 31 . A sufficient amount of light is provided, which generally corresponds to the vertical projection of the secondary display panel 310 on the secondary light exit surface 328. The sub-optical film group 325 is disposed between the sub-light-emitting surface 328 of the light guide plate 322 and the sub-display panel 310. The reflection sheet 323 includes a pair of openings 329' of the pair of sub-optical film groups 325, and the area of the opening 329 is substantially equal to the sub-optical film group 325 and the sub-display panel 3. The main optical film group 324 is disposed between the main light-emitting surface 327 of the light guide plate 322 and the main display panel 330. The area thereof is substantially equal to the main display panel ο [0019] Please refer to FIG. 5 A block diagram of a display driving circuit of a dual-screen liquid crystal display device 30. The display driving circuit includes a main system 343, a switching circuit 344, a first driving circuit 345, and a second driving circuit 346. The main system 343 is powered by the main system 343. The main system 343 converts the voltage provided by the external power supply into the voltage required by the first driving circuit 345 and the second driving circuit 346, and is the first driving circuit 345. The second driver circuit 346 provides a data signal. The switch circuit 344 includes a first path 344A and a second path 3α2, which are numbered by the 096103218 form number 1010101 page 11/29 pages 1003286222-0 1356237. '__' ——— 1〇〇 έ έ όέ όέ 曰 曰 曰 寊 寊 寊 寊 寊 寊 寊 寊 开关 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊 寊3 for the first driving circuit 3 4 5 ':' electrically and shuts down the second drive circuit 346; when the second circuit 3412 is turned on, the main system 343 supplies power to the second drive circuit 346 and turns off the first drive circuit 345. The first drive circuit 345 is connected to all of the LEDs 321 of the backlight module 320. The second driving circuit 346 is connected to a portion of the LEDs 321 corresponding to the sub-display panel 310. [0020] When the notebook computer 3 is dual-screened When the angle between the liquid crystal display device 30 and the main unit 31 changes in a certain direction and is greater than a certain preset angle, if the angle between the two becomes larger and is between 100 degrees and 150 degrees, the Hall switch 33 is according to the When the direction of the angle change is outputting a control signal to control the first path 3441 of the switch circuit 344 to be turned on, the main system 343 supplies power to the first driving circuit 345 via the first path · 3441, and the first driving circuit 345 sends out A feedback signal is sent to the main system 343. The main system 343 stops providing the data signal to the second driving circuit 346 by providing the data signal to the main display panel 330 via the first driving circuit 345 according to the internal program. The first driving circuit 345 supplies power to all of the LEDs 321 of the backlight module 320 to illuminate all of the LEDs 321 . The light emitted by the LEDs 321 passes through the light guide plate 322 and the reflective sheet 323 . The optical function of the main optical film group 324 provides uniform planar light for the main display panel 330 to display the main display panel 330 normally. At this time, since the sub display panel 310 has no data signal and power supply, It is off. [0021] When the angle between the dual-screen liquid crystal display device 30 of the notebook computer 3 and the host computer 31 changes in a certain direction by less than a certain preset angle, such as the angle between the two 096103218, the form number A0101, page 12/total 29 When the page 1003286222-0 1356237 is less than 30 degrees, the Hall switch 33 outputs another correction control signal according to the angle of change of the angle of 100 years from the month of the month of the year of the month of the year: the second path 3442 of the circuit 344 is turned on. The system 343 supplies power to the second driving circuit via the second path 3442, and the second driving circuit 346 sends another feedback signal to the main system 343. The main system 343 is controlled according to its internal program via the second The driving circuit 346 provides a data signal for the sub-display panel 31G to stop providing data for the main display panel 33G. The second driving circuit 346 supplies power to a portion of the LEDs corresponding to the sub-display panel 310. The light emitting diode 321 emits light. The light emitted by the portion of the light-emitting diode milk passes through the optical function of the light guide plate 322 and the second optical film group 325, so that the sub-display panel 3H is normally displayed. The main display panel 33 is in a closed state because there is no data and electricity. [0022] Compared with the prior art, the dual-screen liquid crystal display device 3() controls some or all of the illumination according to the display requirements of the main display panel 33Q and the sub-display panel 31 by the signal of the Hall switch 33. The diode 32ι should be lit, not - straight and bright enough to save power and extend the working life of some of the LEDs 321 when the demand is displayed. [0023] Referring to FIG. 6, a perspective exploded view of a second embodiment of the dual-screen liquid crystal display I of the present invention is used. The dual-screen liquid crystal display device 4 includes a sub-display panel 410, a backlight module 42A, and a main display panel 43A. The dual-screen liquid crystal display device 4 is basically the same as the dual-screen liquid crystal display device (4), and the difference is that the backlight module 420 includes a main lamp tube 412, a sub-light tube 413, and one of the top-down steps. Shot (10), a light guide plate, a main optics:: . The light guide plate 422 includes a master light surface 4G2, 1 near the main light incident surface 096103218, a form number A 〇 101, a page 13 / a total of 29 pages 1003286222-0 1356237 loo year 〇έ month called ai correction replacement page 402 main light surface 4 27. A sub-light incident surface 3 opposite to the main light incident surface 402 and a sub-light exit surface 428 adjacent to the sub-light surface 403 and opposite to the main light exit surface 427. The main lamp tube 412 is a Cold Cath-ode Florescent Lamp (CCFL) adjacent to the main light incident surface 402 to provide light to the main display panel 430. The sub-lamp 413 is also a cold cathode fluorescent lamp adjacent to the sub-light incident surface 403 to provide light to the sub-display panel 410. The power of the sub-light tube 41 3 is less than the power of the main lamp tube 41 2 , and the length of the sub-light tube 413 is less than the length of the main lamp tube 412 , which is generally associated with the sub-display panel 410 on the sub-light-emitting surface 428 The vertical projections are of equal length. [0024] Compared with the prior art, the display driving circuit (not shown) of the dual-screen liquid crystal display device 40 receives the signal of the Hall switch, and controls the display according to the display requirements of the main display panel 410 and the sub-display panel 430. The main lamp tube 412 or the sub-light tube 413 is respectively illuminated to achieve power saving. [0025] The dual-screen liquid crystal display device 30 and the dual-screen liquid crystal display device 40 are not only applicable to a display device of a notebook computer, but also can be used in modern information devices such as mobile phones and personal assistants. In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only the preferred embodiment of the present invention, and those skilled in the art will be able to include the equivalent modifications or variations in the spirit of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS [0027] FIG. 1 is a side view of a prior art dual screen liquid crystal display device. 2 is a side view of another prior art dual screen liquid crystal display device. 096103218 Form No. A0101 Page 14 of 29 1003286222-0
100年.08月08日修正替換頁 1356237 [0029] 圖3係採用本發明雙屏液晶顯示裝置第一實施方式之筆記 型電腦之立體示意;Ργ : ,. s - [0030] 圖4係圖3所示雙屏液晶顯示裝置之立體分解示意圖。 [0031] 圖5該圖3所示雙屏液晶顯示裝置之顯示驅動電路之結構 框圖。 [0032] 圖6係本發明雙屏液晶顯示裝置第二實施方式之立體分解 示意圖。 【主要元件符號說明】 [0033] 筆記型電腦： 3 [0034] 雙屏液晶顯示裝置：30、ζ [0035] 主機：31 [0036] 轉軸：32 [0037] 霍爾開關：33 [0038] 副顯示面板： 310 、 410 [0039] 背光模組：320、420 [0040] 主顯示面板： 330 、 430 [0041] 發光二極體： 321 [0042] 導光板：322 ' 422 [0043] 反射片：323 ' 423 [0044] 主光學膜片組 ：324 ' 424 [0045] 副光學膜片組 ：325 ' 425 表單編號Α0101 第15頁/共29頁 096103218 1003286222-0 1356237 100年οέ月08自核正替換頁 [0046] 入光面：326 [0047] 主出光面：327、427 [0048] 副出光面：328、428 [0049] 開口 ： 329、429 [0050] 主系統：343 [0051] 開關電路：344 [0052] 第一通路：3441 [0053] 第二通路：3442 [0054] 第一驅動電路：345 [0055] 第二驅動電路：346 [0056] 主燈管·· 412 [0057] 副燈管：413 [0058] 主入光面：402 [0059] 副入光面：403 1003286222-0 096103218 表單編號A0101 第16頁/共29頁100 years. August 08 revision replacement page 1356237 [0029] FIG. 3 is a perspective view of a notebook computer using the first embodiment of the dual screen liquid crystal display device of the present invention; Ρ γ : ,. s - [0030] FIG. 3 is a perspective exploded view of the dual-screen liquid crystal display device. 5 is a block diagram showing the structure of a display driving circuit of the dual-screen liquid crystal display device shown in FIG. 3. 6 is a perspective exploded view of a second embodiment of a dual screen liquid crystal display device of the present invention. [Main component symbol description] [0033] Notebook computer: 3 [0034] Dual-screen liquid crystal display device: 30, ζ [0035] Main unit: 31 [0036] Rotary shaft: 32 [0037] Hall switch: 33 [0038] Display panel: 310, 410 [0039] Backlight module: 320, 420 [0040] Main display panel: 330, 430 [0041] Light-emitting diode: 321 [0042] Light guide: 322 ' 422 [0043] Reflector: 323 ' 423 [0044] Main optical film set: 324 ' 424 [0045] Sub-optical diaphragm set: 325 ' 425 Form No. 101 0101 Page 15 / Total 29 096103218 1003286222-0 1356237 100 years οέ月08 self-nuclear Replacement page [0046] Light-in plane: 326 [0047] Main light-emitting surface: 327, 427 [0048] Sub-light-emitting surface: 328, 428 [0049] Opening: 329, 429 [0050] Main system: 343 [0051] Switching circuit [3442] First path: 3441 [0053] Second path: 3442 [0054] First drive circuit: 345 [0055] Second drive circuit: 346 [0056] Main lamp · · 412 [0057] Sub lamp Tube: 413 [0058] Main entrance surface: 402 [0059] Sub-lighting surface: 403 1003286222-0 096103218 Form number A0101 Page 16 of 29