!375〇84 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種背光模組及採用該背光模組之液晶 .顯示裝置。 【先前技術】 液晶顯示裝置具有低韓射、輕薄及省電等優點，已廣 泛應用於各種資訊、通訊、消費性數位產品中。 由於成本及市場需要’目前之液晶顯示裝置通常採用 鲁簡單矩陣結構之超級扭曲向列（Super twisted nematic，STN) 才吴式以及使用有源矩陣結構之扭曲向列（twisted nematic, TN)模式。但是，上述模式之液晶顯示裝置之可視角度狹 窄。 請參閱圖1’係—種先前技術液晶顯示裝置之結構示 意圖。該液晶顯示裝置⑽包括一液晶顯示面板u及—背 光模組1〇。該背光模組10包括-第-擴散片12、-稜鏡 片13、第一擴散片14、一導光板15、一反射片16及一 光源17。該液晶顯示面板u、該第—擴散片12、該棱鏡 片13、第二擴散片14、該導光板15及該反射片16從上至 下依次設置。該光源17靠近該導光板一側邊設置。 該光源17為該道忠4 c 6丄丄# $ u 導先板15提供光線。該反射片16用於 反射由s亥導光板15淹、、g +也从 Π將光源發出之光線至該導光板15。該導光板 η。光線經該第二t! 光形式導出至該第二擴散片 U Iff M 散片14擴散均勻後射出至該稜鏡片 13。s亥稜鏡片13上*而目各 之 _ 〃有複數棱型突起結構，將光線 6 2射角度向中央集中，使光線向垂直於該棱鏡片13方向匯 °亥第—擴散片12進—步將從該棱鏡片13射出之光線 :::匕。然後，光線透過該第一擴散片12後進入該液晶顯 ::、U ’從而能夠顯示各種畫面。因此，在觀看者正對 顯示面板11時’由於光線充足，可以獲得較好的觀 -而Γ ’在—些特殊場合，需要從特定角度觀看該液晶顯 ="11時，該液晶顯示裝置100則無法勝任。例如，若 :從特疋之較大角度（如與該液晶顯示面板11呈一定角 觀看該液晶顯示面板11時，在該特定角度下所 ϋ 效果較差，從而影響液晶顯示裝置_的正 【發明内容】 有鑑於此，提供一種在特定角度下仍可 裝置能夠正常使用之背光模組實為必要。以曰曰』不 、正定角度觀看時仍可使得液晶顯示裝置能 约正^使用之液晶顯示裝置亦為必要。 相互’其包括—控制層一第—電極及複數 談第-、ΐ 該控制層其係—高分子分散液晶層。 σχ 、第二電極分別位於該控制層的兩側，該第—φ技 與該第-電極之間具有一傾斜角度。當該第 被施加電壓時，該液晶層中之 向排列，在與該第一、第二電極之間的== 該控制層之先透過率加強，表現特定㈣特,向上 7 1375084 =電極未被施加電壓時，該液晶層中之液晶分子呈雙極 排列’並且軸向各異，光線在控制層令發生散射。 广-種液日日日㈣裝置，其包括—液晶顯示面板及一背光 板、且。遠液晶顯示面板包括—第—基板、—第二基板及一 :置於，二基板之間之液晶層。該背光模組包括一控制 二:弟-電極及複數相互平行第二電極。該控制層盆係 子分散液晶層。該第一、第二電極分別位於該控制 層的兩侧’該第二電極與該第—電極之間具有—傾斜角 該第-、第二電極被施加電壓時，該液晶層中之液 日曰刀子之長軸平行電場方向排列，在與該第―、第二 之間的電場平行的方向上該控制層之光透過率 = 特，視角特性’當該第一、第二電極未被施加電壓時表： 液曰曰層中之液晶分子呈雙極排列’並且 光 控制層中發生散射。 九線在 "=ίΓ:，上述背光模組包括該第-電極、該 工g 1㈣—f極，該第二電極與該第 傾：角度广第-、第二電極被施加電壓時，I與 “第-第-、第二電極之間的電場平行的方向 率加強’表現特定視角特性，從而在特定；i; 正常裝置時，該液晶顯示裝置具有足夠的輝度能夠 【實施方式】 發明液晶顯示裝置第-實施方式之 、、，。構该液晶顯示裝置200包括一液晶顯示面板21 8 l375〇84 及月光模組20。該背光模組20包括一第一電極22、一 控制層23、複數第二電極24、一稜鏡片25、一擴散片％、 一導光板27、一反射片28及一光源29〇該液晶顯示面板 21、該控制層23、該稜鏡片25、該擴散片26、該導光板 及27及該反射片28從上至下依次設置。 該液晶顯示面板21包括一第一基板（未標示）、一相對 亥苐基板之第一基板（未標示）及一設置於該第一、第二 基板之間之液晶層（未標示）。 邊導光板27包括一入光面（未標示）、一與該入光面垂 f相接之出光面（未標示）及一與該出光面相對之底面（未 ‘:。该光源29相鄰該入光面設置。該擴散片％鄰近該 出光面。該反射片28鄰近該導光板27之底面設置。該導 ，板27可將來自光源29之紐轉㈣平面光射出至該擴 政片26。4擴散片26用於將光線均勻擴散後射出至該稜 鏡片25。 • 該稜鏡片25鄰近該控制層23之上表面具有複數連續 分佈之Λ型突起（未標示）。每一八型突起具有一第一側面 (未標示）及與該第一侧面相接之第二侧面（未標示），該第 •―、第三侧面分別與該控制層23呈一定傾斜角度。該複數 .第-側面相互平行’該複數第二側面亦彼此相互平行。該 複數Λ型突起之第-、第二側面延伸至該稜鏡片25之整個 上表面。該Λ型突起可將光線向垂直於該控制層23之方向 匯聚後提升該匯聚區域内之光線輝度。該複數第二電極Μ 为別設置於該複數Λ型突起之第一側面上。 9 1375084 請一並參閱圖3，其係該稜鏡片25之立體放大示意 圖。該稜鏡片25之複數Λ型突起二端分別用一導電膠帶 (未標示）覆蓋，該導電膠帶係貼附於該複數第二電極24 上，並電連接該複數第二電極24。 該控制層23係由高分子分散液晶（polymer dispersed liquid crystal, PDLC)構成，包括複數液晶微滴及高分子聚 合物。該複數液晶微滴均勻分佈於該高分子聚合物中。該 液晶微滴之直徑大小在1 # m與4 # m之間，其中充滿液晶 籲分子。當光線沿著液晶分子長軸方向傳播時，其光波之電 場振動方向皆垂直於該液晶分子長軸，光速皆相同，稱為 尋常光，定義其折射率稱為尋常光折射率。該液晶微滴中 之液晶分子之尋常光折射率一般在1.4與1.5之間。該高 分子聚合物可以是聚乙稀醇（Polyvinyl Alcohol, PVA)、三 醋酸纖維素（Triacetyl Cellulose Film, TAC)或者聚甲基丙 烯酸甲 S旨（Polymethyl Methacrylate，PMMA)，其對應折射 率分別為 1.446、1.485 及 1.49。 * 該第一電極22設置於該控制層23鄰近該液晶顯示面 板21之表面上，呈層狀佈滿該控制層23。該第一、第二 電極22、24均為透明電極，其材質可為氧化銦錫（indium tin oxide，ITO)。 當該控制層23未被施加電場時，該液晶微滴中之液晶 分子呈雙極排列，並且軸向各異，該控制層23呈散射狀 態，光線在該控制層23中發生散射現象。 當該控制層23被施加一定電場時，該液晶微滴中之液 1375084 二I:，行電場方向排列。此時入射光線在該液晶 發生折射，平行於電場方向之光分量直接射出， 場方向之光分量繼續發生折射，以使得可以射出 平行於該電場方向之光線。即，使得與液晶分子長 致的光透過率加強，並降低其他方向的透過率’ 見角特性’從而在特定角度觀看液晶顯示裝置 時’该液晶顯禾裝置具有足夠的輝度能夠正常使用。 並參閲圖4及圖5，其係該控制層23之工作原理 二二該液晶顯示裝置200進一步包括一電源電路2〇1。 ^二电路2〇1包括一直流電源、2〇2及一控制開關203。 ^ '開關203可以根據觀看者輸入之控制訊號開啟 電源— 當觀看者位於該液晶顯示面板21正前方時，觀看者輸 =閉訊號至該控制開關203。該控制開關2〇3關閉， 層23未被施加電場’該控制層。處於散射狀態， 斤I :此時，來自該稜鏡片25之向垂直該控制層 難 該控制層23後發生散射。域在該控 曰23散射後，變得更加均句並射出至該液晶顯示面板 Z I ° w t觀看者因特殊需要而位於該液晶顯示面板21 -側 定角度觀看日寸’觀看者輸入一開啟訊號至該控制開關 Z該控制開關203開啟，該第-、第二電極22、24通 电’該第-電極22為正電壓，該第二電極“為負電壓。 1375084 該控制層23被施加電場，^該控制23處於透明狀離375 〇 84 IX. Description of the Invention: [Technical Field] The present invention relates to a backlight module and a liquid crystal display device using the same. [Prior Art] The liquid crystal display device has the advantages of low Han shot, light weight, and power saving, and has been widely used in various information, communication, and consumer digital products. Due to cost and market demand, the current liquid crystal display devices usually adopt the Super Twisted Nematic (STN) of the simple matrix structure and the twisted nematic (TN) mode using the active matrix structure. However, the liquid crystal display device of the above mode has a narrow viewing angle. Please refer to FIG. 1' for a schematic diagram of a prior art liquid crystal display device. The liquid crystal display device (10) includes a liquid crystal display panel u and a backlight module. The backlight module 10 includes a first diffusion sheet 12, a cymbal sheet 13, a first diffusion sheet 14, a light guide plate 15, a reflection sheet 16, and a light source 17. The liquid crystal display panel u, the first diffusion sheet 12, the prism sheet 13, the second diffusion sheet 14, the light guide plate 15, and the reflection sheet 16 are disposed in order from top to bottom. The light source 17 is disposed adjacent to one side of the light guide plate. The light source 17 provides light to the channel loyalty 4 c 6 丄丄 # $ u lead plate 15. The reflection sheet 16 is for reflecting light that is flooded by the light guide plate 15, and g + also emits light from the light source to the light guide plate 15. The light guide plate η. The light is led to the second diffusion sheet via the second t! light form. U Iff M The diffusion sheet 14 is uniformly diffused and then emitted to the cymbal sheet 13.稜鏡 稜鏡 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 13 The light emitted from the prism sheet 13 is:::匕. Then, the light passes through the first diffusion sheet 12 and enters the liquid crystal display ::, U ' to display various screens. Therefore, when the viewer is facing the display panel 11, 'because the light is sufficient, a better view can be obtained - and in some special occasions, when the liquid crystal display is required to be viewed from a specific angle, the liquid crystal display device 100 is not competent. For example, if the liquid crystal display panel 11 is viewed at a certain angle from the liquid crystal display panel 11, the effect is poor at the specific angle, thereby affecting the liquid crystal display device. In view of this, it is necessary to provide a backlight module that can still be used normally under a certain angle. The liquid crystal display device can still be used for liquid crystal display when viewed from a fixed angle. The device is also necessary. It includes a control layer, a first electrode, a plurality of electrodes, and a plurality of layers. The control layer is a polymer dispersed liquid crystal layer. The σχ and the second electrodes are respectively located on both sides of the control layer. The first-φ technique has an oblique angle with the first electrode. When the voltage is applied, the alignment in the liquid crystal layer is between the first and second electrodes == the control layer First, the transmittance is enhanced, and the performance is specific (four). Up 7 1375084 = When the electrode is not applied with voltage, the liquid crystal molecules in the liquid crystal layer are bipolarly arranged 'and the axial directions are different, and the light is scattered in the control layer. The liquid day and day (4) device comprises a liquid crystal display panel and a backlight panel, and the far liquid crystal display panel comprises a first substrate, a second substrate and a liquid crystal layer disposed between the two substrates. The backlight module includes a control unit: a second electrode and a plurality of parallel second electrodes. The control layer basin disperses the liquid crystal layer. The first and second electrodes are respectively located on opposite sides of the control layer. When the first and second electrodes are applied with a voltage between the first and second electrodes, the long axis of the liquid kiln in the liquid crystal layer is aligned in parallel with the electric field direction, and between the first and second The light transmittance of the control layer in the direction parallel to the electric field is special, the viewing angle characteristic 'when the first and second electrodes are not applied with voltage, the liquid crystal molecules in the liquid helium layer are arranged in a bipolar shape' and the light control layer The scattering occurs in the middle line. The backlight module includes the first electrode, the g 1 (four)-f pole, the second electrode and the first tilt: the angle is wide - and the second electrode is applied At voltage, between I and "the first - and second electrodes The parallel direction of the electric field is enhanced to 'represent a specific viewing angle characteristic, so that the liquid crystal display device has sufficient luminance when it is a normal device. [Embodiment] The liquid crystal display device of the invention is embodied in the first embodiment. The liquid crystal display device 200 includes a liquid crystal display panel 21 8 375 〇 84 and a moonlight module 20. The backlight module 20 includes a first electrode 22, a control layer 23, a plurality of second electrodes 24, a cymbal 25, and a diffusion. a sheet %, a light guide plate 27, a reflection sheet 28, and a light source 29, the liquid crystal display panel 21, the control layer 23, the cymbal sheet 25, the diffusion sheet 26, the light guide plate 27, and the reflection sheet 28 from above The liquid crystal display panel 21 includes a first substrate (not labeled), a first substrate (not labeled) opposite to the substrate, and a liquid crystal layer disposed between the first and second substrates ( Not marked). The side light guide plate 27 includes a light incident surface (not shown), a light exit surface (not labeled) that is in contact with the light incident surface, and a bottom surface opposite to the light exit surface (not ': the light source 29 is adjacent to the light source 29 The light-incident surface is disposed adjacent to the light-emitting surface. The reflection sheet 28 is disposed adjacent to the bottom surface of the light guide plate 27. The guide plate 27 can emit the light from the light source 29 to the expansion sheet. 26. 4 diffuser 26 is used to uniformly diffuse the light and then exit to the cymbal 25. The cymbal 25 has a plurality of continuously distributed 突起-shaped protrusions (not labeled) adjacent to the upper surface of the control layer 23. The protrusion has a first side surface (not labeled) and a second side surface (not labeled) that is in contact with the first side surface, and the first and third side surfaces respectively have a certain inclination angle with the control layer 23. The plural number - the sides are parallel to each other'. The plurality of second sides are also parallel to each other. The first and second sides of the plurality of dome-shaped protrusions extend to the entire upper surface of the cymbal 25. The ridge-shaped protrusions can direct the light perpendicular to the control The direction of the layer 23 is concentrated to enhance the area in the convergence area. The second electrode Μ is disposed on the first side of the plurality of protrusions. 9 1375084 Please refer to FIG. 3 together, which is a perspective enlarged view of the cymbal 25. The plurality of cymbals 25 The two ends of the 突起-shaped protrusion are respectively covered with a conductive tape (not shown) attached to the plurality of second electrodes 24 and electrically connected to the plurality of second electrodes 24. The control layer 23 is dispersed by a polymer. The liquid crystal polymer (PDLC) comprises a plurality of liquid crystal droplets and a polymer. The plurality of liquid crystal droplets are evenly distributed in the polymer. The diameter of the liquid crystal droplets is 1 #m and 4 Between the #m, which is filled with liquid crystal molecules. When the light propagates along the long axis of the liquid crystal molecules, the direction of the electric field vibration of the light waves is perpendicular to the long axis of the liquid crystal molecules, and the speed of light is the same, called ordinary light, defining its refraction. The rate is called the ordinary refractive index. The ordinary light refractive index of the liquid crystal molecules in the liquid crystal droplets is generally between 1.4 and 1.5. The high molecular polymer may be Polyvinyl Alcohol (PVA). Triacetyl Cellulose Film (TAC) or Polymethyl Methacrylate (PMMA) has a corresponding refractive index of 1.446, 1.485 and 1.49, respectively. * The first electrode 22 is disposed on the control layer 23 The control layer 23 is layered on the surface of the liquid crystal display panel 21. The first and second electrodes 22 and 24 are transparent electrodes, and the material thereof may be indium tin oxide (ITO). When the control layer 23 is not applied with an electric field, the liquid crystal molecules in the liquid crystal droplets are arranged in a bipolar manner and are axially different, and the control layer 23 is in a scattering state, and light is scattered in the control layer 23. When the control layer 23 is applied with a certain electric field, the liquid in the liquid crystal droplets is 1375084, and the direction of the electric field is aligned. At this time, the incident light is refracted in the liquid crystal, and the light component parallel to the direction of the electric field is directly emitted, and the light component in the field direction continues to be refracted so that the light parallel to the direction of the electric field can be emitted. Namely, the light transmittance which is longer with the liquid crystal molecules is enhanced, and the transmittance in other directions is lowered, and the angle characteristic is seen to be viewed when the liquid crystal display device is viewed at a specific angle. The liquid crystal display device has sufficient luminance to be used normally. Referring to FIG. 4 and FIG. 5, it is the working principle of the control layer 23. The liquid crystal display device 200 further includes a power circuit 2〇1. ^Two circuits 2〇1 include a DC power supply, a 2〇2, and a control switch 203. ^ 'The switch 203 can turn on the power according to the control signal input by the viewer. When the viewer is directly in front of the liquid crystal display panel 21, the viewer inputs a closed signal to the control switch 203. The control switch 2〇3 is turned off and the layer 23 is not applied with an electric field 'the control layer. In the scattering state, jin I: at this time, the direction from the cymbal 25 is perpendicular to the control layer, and the control layer 23 is difficult to scatter. After the control 23 is scattered, the domain becomes more uniform and is emitted to the liquid crystal display panel ZI ° wt. The viewer is located on the liquid crystal display panel 21 due to special needs - side angle viewing day inch 'viewer input one open signal To the control switch Z, the control switch 203 is turned on, and the first and second electrodes 22, 24 are energized 'the first electrode 22 is a positive voltage, and the second electrode is a negative voltage. 1375084 The control layer 23 is applied with an electric field. ^The control 23 is in a transparent state
如圖5所示。根據電場線垂直電極表面之原理 二J 極22與該第二電極24間 / 屯 示而柘场方向偏向該液晶顯 一則，而與該液晶顯示面板21成一定角戶。 該控制層23中之液晶分子長軸按照電場方向排列。此^ 來自該稜鏡片25之光線進人該控制層23後在該電場方向 上先透過率加強’並降低其他方向的透過率，表現出As shown in Figure 5. According to the principle of the electric field line perpendicular to the surface of the electrode, the liquid crystal display is biased between the J pole 22 and the second electrode 24, and the liquid crystal display panel 21 is formed at a certain angle. The long axes of the liquid crystal molecules in the control layer 23 are arranged in the direction of the electric field. When the light from the cymbal 25 enters the control layer 23, the transmittance is first enhanced in the direction of the electric field and the transmittance in the other direction is lowered, showing
，角特性’從而在該特定角度觀看液晶顯示裝置時，該液 晶顯不裝置200具有足夠的輝度能夠正常使用。 XThe angular characteristic is such that when the liquid crystal display device is viewed at the specific angle, the liquid crystal display device 200 has sufficient luminance to be used normally. X
請參閱圖6,係本發明液晶顯示裝置第二實施方式之 結構示意圖。該液晶顯示裝置3〇〇包括一液晶顯示面板Η 及一背光模組30。該背光模組3〇包括一第— 稜鏡片352、一擴散片36、一導光板37、一反射片％及 光源39。該液晶顯示面板3丨、該控制層、該第一浐 鏡片351、該第二稜鏡片352、該擴散片％、該導光板^ 及該反射片38從上至下依次設置。 該液晶顯示面板31包括一第一基板（未標示）、一第二 •基板（未標示）及一設置於該二基板之間之液晶層（未標示）。 該導光板37包括-人光面（未標示）、_與該入光面垂 直相接之出光面（未標示）及一與該出光面相對之底面（未 標示）。該光源39鄰近該入光面設置。該擴散片刊鄰近該 出光面設置。該反射片38鄰近該導光板37之底面設置。 該導光板用於將來自光源39之光線以平面出射形式導出 1375084 至該擴散片36。該擴散片％用於將 至該第二稜鏡片352。用於將先線均句擴散後射出 ，近該控制層33之表面上具有複數 浐二35^犬ί(未私不”该第二稜鏡片352鄰近該第-^片州之面亦具有複數連續之Λ型突起。每一八型 具有一弟一側面(未標示)及一與該第一側面相接之 =側面(未標示)。該第一稜鏡片351上之複數八型突起 之第-側面相互平行，第二侧面亦相互平行。該第 二3…複數Λ型突起之第一側面相互平行，第二侧： :目互平仃’並且該第二稜鏡片352上之複數Λ型突起之 第一、第二側面之延伸方向分別垂直於該第 上之複數Λ型突起之第一、第二側面之延伸方向。 該複數第二電極34分別設置於該第一、第二稜鏡片 351、352上之複數八型突起之第一側面上。 請一併參閱圖7,係該第一、第二稜鏡片351、352之 :體放大示意圖。該第-稜鏡片351上之複數八型突起之 第一、第二側面之二端分別用導電膠帶（未標示）連接起 來。該導電膠帶係貼附於該複數第二電極34上用於分別 電連接該第一稜鏡片351上之複數第二電極34。該第二棱 ’見片3 5 2之複數八型突起之第一、第二側面之二端亦分別 用導電膠帶（未標示）連接起來。該導電膠帶係貼附於該複 數第二電極34上，用於分別電連接該第二棱鏡片352上之 複數第二電極34。 叫併參閱圖8及圖9，圖8係該液晶顯示裝置300 13 1375084 之局部正視圖’圖9係該液晶顯示裝置300之局部側視圖。 該液晶顯示裝置300進一步包括一電源電路3〇1。該電源 电路301包括一直流電源302、一第一控制開關3〇4及一 第二控制開關303。該第一、第二控制開關3〇4、3〇3可以 根據觀看者輸入之控制訊號開啟或者關閉。該第一電極32 經由該直流電源302及該第一、第二控制開關3〇4、3〇3 分別電連接至該第一、第二稜鏡片351、352上之複數第二 電極34。 由於該第一、第二稜鏡片351、352之複數八型突起 之延伸方向相互垂直，因此該第一、第二稜鏡片351、352 上對應之第二電極34之延伸方向亦相互垂直。從而可以根 據需要分別控制該第一控制開關3〇4及該第二控制開關 3〇3之開啟與關閉，使得該液晶顯示裝置3〇〇向不同方向 調整光線射出角度，可以滿足更為廣泛之需求。 本發明液晶顯示裝置200、300亦可具有其他變更實施 方式，如：在該背光模組200中，該複數第二電極24亦可 ，置於複數Λ型突起之第二側面上。在該背光模組3〇〇 该複數第二電極34亦可設置於該複數Λ型突起之第二 細上所述，本發明確已符合發明之要件，麦依 專利申請。惟，以上所述者僅為本發明之較佳實施 本發明之範圍並不以上述實施方式為限，舉凡孰 藝之人士援依本發明之精神所作之等效修物：，$ 涵蓋於以下申請專利範圍内。 自應 1375084 【圖式簡單說明】 圖1係一種先前技術液晶顯示裝置之結構示意圖。 圖2係本發明液晶顯示裝置第一實施方式之結構示意圖 圖3係圖2所示棱鏡片之立體放大示意圖。 θ 圖4〜圖5係圖2所示控制層之工作原理示意圖。 圖6係本發明液晶顯示裝置第二實施方式之結構示音、圖 圖7係圖6所示第一及第二棱鏡片之立體放大示意^。 圖8係圖6所示液晶顯示裝置局部正視示意圖。 圖9係圖6所示液晶顯示裝置局部側視示意圖。 【主要元件符號說明】 液晶顯示裝置 背光模組 液晶顯示面板 第一電極 控制層 第二電極 稜鏡片 擴散片 導光板 2〇〇、300 反射片 28、38 20、 30 光源 29、39 21、 31電源電路 201、301 22、 32直流電源 202、302 23、 33控制開關 203 24、 34第一控制開關 303 25第二控制開關 304 26、 36第一稜鏡片 351 27、 37第二稜鏡片 352 15Referring to Fig. 6, there is shown a schematic structural view of a second embodiment of a liquid crystal display device of the present invention. The liquid crystal display device 3 includes a liquid crystal display panel and a backlight module 30. The backlight module 3 includes a first die 352, a diffusion sheet 36, a light guide plate 37, a reflection sheet %, and a light source 39. The liquid crystal display panel 3, the control layer, the first lens 351, the second die 352, the diffuser%, the light guide plate, and the reflective sheet 38 are disposed in order from top to bottom. The liquid crystal display panel 31 includes a first substrate (not shown), a second substrate (not labeled), and a liquid crystal layer (not labeled) disposed between the two substrates. The light guide plate 37 includes a human face (not shown), a light exit surface (not shown) that is perpendicularly connected to the light incident surface, and a bottom surface (not shown) opposite the light exit surface. The light source 39 is disposed adjacent to the light incident surface. The diffusion sheet is disposed adjacent to the light exiting surface. The reflection sheet 38 is disposed adjacent to the bottom surface of the light guide plate 37. The light guide plate is used to direct the light from the light source 39 to the diffuser 36 in a planar emission form. The diffuser % is used for the second slab 352. It is used to diffuse the first-line average sentence and emit it, and the surface of the control layer 33 has a plurality of 浐2 35^ dogs ί (not private). The second 352 352 is adjacent to the first---the state of the state Continuous ridge type protrusions. Each eight type has a side (not shown) and a side (not shown) which is connected to the first side. The plurality of octagonal protrusions on the first slab 351 The first side faces are parallel to each other, and the second side faces are also parallel to each other. The first side faces of the second plurality of Λ-shaped protrusions are parallel to each other, and the second side: 目 互 并且 并且 and the plurality of 稜鏡 该 on the second 稜鏡 352 The extending direction of the first and second side faces of the protrusion is perpendicular to the extending direction of the first and second sides of the first plurality of Λ-shaped protrusions. The plurality of second electrodes 34 are respectively disposed on the first and second edges The first side surface of the plurality of eight-shaped protrusions on the lenses 351 and 352. Please refer to FIG. 7 together, which is a schematic enlarged view of the first and second cymbals 351 and 352. The two ends of the first and second sides of the plurality of eight-shaped protrusions are respectively connected by conductive tape (not shown) The conductive tape is attached to the plurality of second electrodes 34 for electrically connecting the plurality of second electrodes 34 on the first cymbal 351. The second rib 'sees the plurality of octagonal protrusions of the sheet 3 5 2 The two ends of the first and second sides are also respectively connected by a conductive tape (not shown). The conductive tape is attached to the plurality of second electrodes 34 for electrically connecting the plurality of the second prism sheets 352, respectively. The second electrode 34. Referring to FIG. 8 and FIG. 9, FIG. 8 is a partial front view of the liquid crystal display device 300 13 1375084. FIG. 9 is a partial side view of the liquid crystal display device 300. The liquid crystal display device 300 further includes a The power circuit 301 includes a DC power source 302, a first control switch 3〇4, and a second control switch 303. The first and second control switches 3〇4, 3〇3 can be viewed according to The control signal input is turned on or off. The first electrode 32 is electrically connected to the first and second dies 351 and 352 via the DC power source 302 and the first and second control switches 3〇4, 3〇3, respectively. a plurality of second electrodes 34. Because of the first, The extending directions of the plurality of octagonal protrusions 351 and 352 are perpendicular to each other, so that the extending directions of the corresponding second electrodes 34 on the first and second dies 351 and 352 are also perpendicular to each other, so that they can be separately controlled as needed. The opening and closing of the first control switch 3〇4 and the second control switch 3〇3 enable the liquid crystal display device 3 to adjust the light emission angle in different directions, which can meet a wider range of requirements. The device 200, 300 can also have other modified embodiments. For example, in the backlight module 200, the plurality of second electrodes 24 can also be disposed on the second side of the plurality of dome-shaped protrusions. The plurality of second electrodes 34 may also be disposed on the second thin portion of the plurality of dome-shaped protrusions. The present invention has indeed met the requirements of the invention, and the patent application of Maiyi. However, the above is only the preferred embodiment of the present invention and the scope of the present invention is not limited to the above embodiments, and the equivalents of the present invention are in accordance with the spirit of the present invention: Within the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural view of a prior art liquid crystal display device. 2 is a schematic structural view of a first embodiment of a liquid crystal display device of the present invention. FIG. 3 is a perspective enlarged view of the prism sheet shown in FIG. θ Figure 4 to Figure 5 are schematic diagrams showing the operation of the control layer shown in Figure 2. Fig. 6 is a perspective view showing the structure of the second embodiment of the liquid crystal display device of the present invention, Fig. 7 is a perspective enlarged view of the first and second prism sheets shown in Fig. 6. Figure 8 is a partial front elevational view showing the liquid crystal display device of Figure 6. Figure 9 is a partial side elevational view of the liquid crystal display device of Figure 6. [Description of main component symbols] Liquid crystal display device backlight module Liquid crystal display panel First electrode control layer Second electrode 扩散片 diffusion sheet Light guide plate 2〇〇, 300 Reflecting sheet 28, 38 20, 30 Light source 29, 39 21, 31 Power supply Circuits 201, 301 22, 32 DC power supply 202, 302 23, 33 control switch 203 24, 34 first control switch 303 25 second control switch 304 26, 36 first diaphragm 351 27, 37 second diaphragm 352 15