1335470 - 099年09月21日修正替换頁 六、發明說明： 【發明所屬之技術領域】 [0001] 本發明係關於一種液晶顯示裝置，特別係關於一種扭轉 向列型液晶顯示裝置。 【先前技術】 [0002] 扭轉向列型液晶顯示裝置（Twisted Nematic mode Liquid Crystal Display，TN-LCD)相對於其他液晶 顯示裝置，具有成本低，輸出灰階級數少，液晶分子偏 轉速度快，響應時間短等優點，因此扭轉向列型液晶顯 示裝置成為目前應用最廣泛之入門級液晶顯示裝置，特 . 別是響應時間為8ms以下之疼晶顧示產品基本上均採用扭 轉向列型液晶顯示裝置。', [0003] 然，扭轉向列型液晶顯示裝置由於其結構特點，液晶面 板兩端施加電場之後液晶分子會傾斜站立，但由於受到 邊界效應之影響，液晶分子之傾角分佈不對稱，使得光 線穿過液晶層時會產生相位延遲，進而導致其視角存在 缺陷。因此，目前市面上之扭轉向列型液晶顯示裝置基 • 本上均採用改良之扭轉向列型液晶面板，即在扭轉向列 - 型液晶面板中添加相位補償膜來彌補其視角不足之缺陷 〇 [0004] 如圖1所示，係一種先前技術所揭示之扭轉向列型液晶顯 示裝置之結構圖，該液晶顯示裝置100包括一液晶面板 110及一與該液晶面板110 ί合設置之背光模組120。該 液晶面板110包括依次疊放之一第一偏光片111、一第一 相位補償膜112、一第一基板113、一液晶層114、一第 095143003 表單編號Α0101 第3頁/共18頁 0993339266-0 1335470 099年09月21日俊正替换頁 二基板115、一第二相位補償膜11 6及一與該背光模組 120相鄰設置之第二偏光片117。 [0005] 該第一相位補償膜11 2之光軸方向與該第二相位補償膜 116之光軸方向相垂直，光線經過該相位補償膜112及 116時，其產生之負相位延遲剛好補償了該液晶層114之 正相位延遲，提高了該扭轉向列型液晶顯示裝置100之視 角。 [0006] 然，該液晶面板110搭配該第一相位補償膜112及該第二 相位補償膜116之後，由於不同波長的光線對同一介質之 折射率不同，受到該二相位補償膜112及116折射率之影 響，該扭轉向列型液晶顯示裝置100在黑畫面時無法讓所 有波長的光線之偏振方向均毳該第一偏光片111之光軸方 向成理想的90度，尤其是部份長波段之光線，如波長大 於700奈米之光線無法被該第一偏光片111有效地吸收， 導致黑晝面時此部份光線會透過該第一偏光片111而產生 漏光現象。而作為衡量液晶顯示裝置性能重要參數之一 的對比度，其係指液晶顯示裝置在内定黑白電壓下，白 畫面亮度與黑畫面亮度之比值。因此，該第一相位補償 膜112及該第二相位補償膜116之存在，使得黑晝面亮度 提高，進而導致該液晶顯示裝置100之對比度下降。 【發明内容】 [0007] 有鑑於此，有必要提供一種有效避免黑畫面漏光現象， 提高對比度之液晶顯示裝置。 一種液晶顯示裝置，其包括一液晶面板及一與該液晶面 095143003 板疊合設置之背光模組，該背光模組包括一導光板，該 表單編號A0101 第4頁/共18頁 0993339266-0 [0008] 1335470 099年09月21日按正替換頁 導光板包括一底面及設置於該底面之複數網點’該網點 含有吸收波長大於700奈米之可見光線之材質》 [0009] 一種液晶顯示裝置，其包括一液晶面板及一與該液晶面 板疊合設置之背光模組，該背光模組包括一導光板，該 導光板包括一底面及設置於該底面之複數網點，該網點 吸收長波段光線。 [0010] 相較於先前技術’本發明之液晶顯示裝置，其網點包含 了吸收長波段光線之材質，該材質有效地吸收部份長波 段光線，藉由此調整了液晶顯示裝置之畫面亮度，抑制 了液晶顯示裝置在暗態時此部份光線透過偏光片而產生 .... 漏光現象，有效地降低黑畫面之亮度，提高丨液晶顯示裝 置之對比度。 [0011] 相較於先前技術，本發明之液晶顯示裝置，其網點有效 地吸收部份長波段光線，藉由此調整了液晶顯示裝置之 畫面亮度，抑制了液晶顯示裝置在暗態時此部份光線透 過偏光片而產生漏光現象，有效地降低黑畫面之亮度， 提高液晶顯示裝置之對比度。 【實施方式】 [0012] 請參閱圖2 ’係本發明-種較佳實施方式所揭示之液晶顯 示裝置之結構示意圖。該液晶顯示裝置⑽包括一液晶面 板210及一與該液晶面板21〇疊合設置之背光模組22〇 ^ 該背光模組220為該液晶面板21〇提供一輝度充分且分佈 均勻之面光源。 [0013] 該液晶面板210包括依次疊放之 一第一偏光片211 第 095143003 表單編號A0101 第5頁/共18頁 0993339266-0 1335470 099年09月21日按正替換頁 [0014] [0015] [0016] [0017] 基板213、一液晶層214、 、 I· I. » 弟一 相位補償膜212 第二基板215、-第二相位補償膜216及—第二偏光片 217 °該第二偏光片217將非偏振光轉化為偏振光；該第 -偏光片211實現偏振光之透過與料；該第—基板213 及該第二基板215用於夹持該液晶層214 ;該液晶層214 通過其内部液晶分子在電壓作用下之旋轉實現偏振光偏 振方向之改變；該第一相位補償膜212之光軸方向與該第 二相位補償膜216之光軸方向相垂直，且該第一相位補償 膜212及該第二相位補償膜216利用其產生之負相位延遲 補償該液晶層214產生之正相位延遲。 該背光模組2 2 0包括一導光板2 21及一光源2 2 2。 該導光板221為印刷式導光板，其包括一設置於該液晶面 板210之第二偏光片217 —側之出光面225、一與該出光 面225相對之底面226、與該底面226相鄰之入光面224及 設置於該底面226之複數網點223。 該光源222為冷陰極螢光燈管（Cold Cathode Fluor_ escent Lamp, CCFL)’其設置於該導光板221之入光面 224 一 側。 該導光板221為平板型，其主要材質為具有優良光學特性 且白光透過率高達9 2%之聚曱基丙烯酸曱酯（p〇i ymethyl Methacrylate, PMMA)。該網點223為圓柱型，其係利 用具有高反射及高折射作用之印刷材質，如高發散光之 油墨，通過印刷法製作的，其可使射至該網點223之光線 產生散射’並從該導光板221之出光面225均勻出射。 095143003 表單編號Α0101 第6頁/共18頁 0993339266-0 [0018] [0018] 099年 09月 «亥背光核組22G中’用於製作該網點223之印刷材質，係 i用導光U特殊的有機樹脂配製而成該有機樹脂可 以為纖維素樹脂、乙烯樹脂及丙烯樹脂等。該印刷材質 /、有折射率n N著力強、分散度均句及低溫即可固化 等特點。且，在該印刷材質中，加入了少量能有效吸收 長波段光狀錄材質，祕㈣f可以為碳奈来管、 奈米氧化鋅等。碳奈米管及奈米氡化鋅等材質可以有效 地吸收波長大於7GG奈米之纽，使得此騎光線在射至 該網點223時能被該網點223吸收。上述印刷材質中所加 入之吸收材質必須保證其不會大幅度影響該液晶顯示裝 置200之飽和度及白畫面之亮度。 ' . f ： .. *r.-.1335470 - SEPTEMBER 21, DECEMBER 21, REPRESENTATION REPLACEMENT PAGE 6. Description of the Invention: [Technical Field] [0001] The present invention relates to a liquid crystal display device, and more particularly to a twisted nematic liquid crystal display device. [Previous Technology] [0002] Twisted Nematic mode Liquid Crystal Display (TN-LCD) has a low cost, a small number of output gray levels, and a fast deflection of liquid crystal molecules, and a response with respect to other liquid crystal display devices. The short-term time and other advantages, so the twisted nematic liquid crystal display device has become the most widely used entry-level liquid crystal display device, especially the painful crystal display product with a response time of 8ms or less basically adopts a twisted nematic liquid crystal display. Device. ', [0003] However, due to its structural characteristics, the twisted nematic liquid crystal display device, the liquid crystal molecules will stand obliquely after applying an electric field at both ends of the liquid crystal panel, but due to the boundary effect, the tilt distribution of the liquid crystal molecules is asymmetric, so that the light A phase delay occurs when passing through the liquid crystal layer, which in turn causes defects in its viewing angle. Therefore, the twisted nematic liquid crystal display device on the market currently uses a modified twisted nematic liquid crystal panel, that is, a phase compensation film is added to the twisted nematic liquid crystal panel to compensate for the lack of viewing angle. [0004] FIG. 1 is a structural diagram of a twisted nematic liquid crystal display device disclosed in the prior art. The liquid crystal display device 100 includes a liquid crystal panel 110 and a backlight module disposed with the liquid crystal panel 110. Group 120. The liquid crystal panel 110 includes a first polarizer 111, a first phase compensation film 112, a first substrate 113, a liquid crystal layer 114, a 095143003, a form number Α0101, a third page, a total of 18 pages, 0993339266- 0 1335470 On September 21, 2010, the company replaced the second substrate 115, a second phase compensation film 11 6 and a second polarizer 117 disposed adjacent to the backlight module 120. The optical axis direction of the first phase compensation film 11 2 is perpendicular to the optical axis direction of the second phase compensation film 116. When the light passes through the phase compensation films 112 and 116, the negative phase delay generated is just compensated. The positive phase retardation of the liquid crystal layer 114 improves the viewing angle of the twisted nematic liquid crystal display device 100. [0006] After the liquid crystal panel 110 is matched with the first phase compensation film 112 and the second phase compensation film 116, the light of different wavelengths is different from the same medium, and is refracted by the two phase compensation films 112 and 116. According to the influence of the rate, the twisted nematic liquid crystal display device 100 cannot make the polarization direction of the light of all wavelengths uniform to the optical axis direction of the first polarizer 111 at a desired black level, especially a part of the long wavelength band. The light, such as light having a wavelength greater than 700 nm, cannot be effectively absorbed by the first polarizer 111, and the light is transmitted through the first polarizer 111 to cause light leakage. The contrast ratio, which is one of the important parameters for measuring the performance of the liquid crystal display device, refers to the ratio of the brightness of the white screen to the brightness of the black screen under the black and white voltage of the liquid crystal display device. Therefore, the presence of the first phase compensation film 112 and the second phase compensation film 116 increases the brightness of the black surface, which in turn causes the contrast of the liquid crystal display device 100 to decrease. SUMMARY OF THE INVENTION [0007] In view of the above, it is necessary to provide a liquid crystal display device that effectively avoids black light leakage and improves contrast. A liquid crystal display device includes a liquid crystal panel and a backlight module disposed on the liquid crystal surface 095143003. The backlight module includes a light guide plate. The form number A0101 is 4th/18 pages 0993339266-0 [ 0008] 1335470 On September 21, 099, the light guide plate includes a bottom surface and a plurality of dots disposed on the bottom surface. The dot contains a material that absorbs visible light having a wavelength greater than 700 nm. [0009] A liquid crystal display device, The backlight module includes a liquid crystal panel and a backlight module disposed on the liquid crystal panel. The backlight module includes a light guide plate. The light guide plate includes a bottom surface and a plurality of dots disposed on the bottom surface, and the dot absorbs long-wavelength light. [0010] Compared with the prior art, the liquid crystal display device of the present invention includes a material for absorbing long-wavelength light, and the material effectively absorbs part of the long-wavelength light, thereby adjusting the brightness of the liquid crystal display device. The light-emitting phenomenon of the liquid crystal display device is prevented from being transmitted through the polarizer in the dark state. The light leakage phenomenon effectively reduces the brightness of the black image and improves the contrast of the liquid crystal display device. [0011] Compared with the prior art, the liquid crystal display device of the present invention effectively absorbs part of the long-wavelength light by the dot, thereby adjusting the brightness of the liquid crystal display device, and suppressing the liquid crystal display device in the dark state. The light passes through the polarizer to cause light leakage, effectively reducing the brightness of the black image and improving the contrast of the liquid crystal display device. [Embodiment] [0012] Please refer to FIG. 2, which is a schematic structural view of a liquid crystal display device according to a preferred embodiment of the present invention. The liquid crystal display device (10) includes a liquid crystal panel 210 and a backlight module 22 disposed on the liquid crystal panel 21. The backlight module 220 provides a surface light source with sufficient brightness and uniform distribution for the liquid crystal panel 21A. [0013] The liquid crystal panel 210 includes one of the first polarizers 211 stacked in sequence. 095143003 Form No. A0101 Page 5 / 18 pages 0993339266-0 1335470 September 21, 2009 Pressing the replacement page [0014] [0015] [0017] a substrate 213, a liquid crystal layer 214, an I. I., a phase compensation film 212, a second substrate 215, a second phase compensation film 216, and a second polarizer 217 ° the second polarized light The sheet 217 converts the unpolarized light into polarized light; the first polarizer 211 transmits the polarized light and the material; the first substrate 213 and the second substrate 215 are used to sandwich the liquid crystal layer 214; the liquid crystal layer 214 passes The rotation of the internal liquid crystal molecules under the action of the voltage realizes the change of the polarization direction of the polarized light; the optical axis direction of the first phase compensation film 212 is perpendicular to the optical axis direction of the second phase compensation film 216, and the first phase compensation The film 212 and the second phase compensation film 216 compensate for the positive phase delay produced by the liquid crystal layer 214 using the negative phase retardation that it produces. The backlight module 220 includes a light guide plate 21 and a light source 2 22 . The light guide plate 221 is a printed light guide plate, and includes a light exit surface 225 disposed on a side of the second polarizer 217 of the liquid crystal panel 210, a bottom surface 226 opposite to the light exit surface 225, and a bottom surface 226 adjacent to the bottom surface 226. The light incident surface 224 and the plurality of dots 223 disposed on the bottom surface 226. The light source 222 is a Cold Cathode Fluorescent Lamp (CCFL) disposed on one side of the light incident surface 224 of the light guide plate 221 . The light guide plate 221 is of a flat type, and is mainly made of p〇i ymethyl Methacrylate (PMMA) having excellent optical characteristics and a white light transmittance of up to 92%. The dot 223 is a cylindrical type, which is made of a printing material having high reflection and high refraction, such as a high-dispersion ink, which is produced by a printing method, which can scatter light incident on the dot 223 and from the guide The light exit surface 225 of the light plate 221 is uniformly emitted. 095143003 Form No. 1010101 Page 6/Total 18 Page 0993339266-0 [0018] [0018] In September 2009, the "Hui Backlight Nuclear Group 22G" was used to make the printing material of the dot 223, which is a special light guide U. The organic resin may be a cellulose resin, a vinyl resin, an acrylic resin or the like. The printing material has the characteristics of strong refractive index n N , uniform dispersion and solidification at low temperatures. Moreover, in the printing material, a small amount of light-absorbing material capable of effectively absorbing long-wavelength is added, and the secret (four) f can be carbon nanotubes, nano zinc oxide, and the like. Materials such as carbon nanotubes and nano zinc telluride can effectively absorb the wavelengths of wavelengths greater than 7 GG nanometers, so that the riding light can be absorbed by the dots 223 when it hits the dots 223. The absorbing material added to the above printing material must be such that it does not greatly affect the saturation of the liquid crystal display device 200 and the brightness of the white screen. ' . f : .. *r.-.
[0019] 相較於先前技術’本發明之.液晶顯示裝置2〇〇，其在製作 該導光板221之網點223之印刷材質中加入能吸收長波段 光線之材質，使得該光源222發出之光線射至該網點223 時，其中長波段光線被該由上述印刷材質印製而成之網 點223有效地吸收’避免了該液晶顯示裝置200在暗熊時 此部份光線透過該第一偏光片221而產生漏光，降低了供 態時該液晶顯示裝置2〇〇之穿透率’同時減小其黑畫面之 亮度，提高該液晶顯示裝置200之對比度。 [0020]請參照圖3，係該液晶顯示裝置200在黑畫面時的穿透頻 譜圖。該頻譜圖係表示黑畫面時該液晶顯示裝置2〇〇之穿 透率與光線波長的關係曲線’其包括一第一曲線31〇及一 第二曲線320，其中該第一曲線310為用於製作該網點 223之印刷材質中未加入可吸收長波段光線之材質時之穿 透率/波長曲線，該第二曲線320為本發明用於製作該網 095143003 表單编號A0101 第7頁/共18頁 0993339266-0 1335470 099年09月21日修正替换頁 點223之印刷材質中加入少量奈米氧化鋅後之穿透率/波 長曲線。根據該頻譜圖可以得到，本發明之液晶顯示裝 置200中，用於製作該網點223之印刷材質中加入少量奈 米氧化鋅後，在黑畫面時，波長為700奈米以下之光線之 穿透率基本不受影響，該第一曲線310及該第二曲線320 在此頻譜段基本重合；而該第二曲線320中，由於波長為 700奈米以上之光線被奈米氧化鋅很好地吸收，因此該第 二曲線320不會出現如該第一曲線310中，在波長700奈 i 米以上之頻譜段，穿透率突然明顯增大之情況。 [0021] 請參照圖4，係該液晶顯示裝置200在黑晝面時該液晶面 板210表面之光能量強度頻譜圖。該頻譜圖係表示黑畫面 時該液晶面板21 0表面之光能量強度與光線波長的關係曲 線，其包括一第一曲線410及一第二曲線420，其中該第 一曲線410為用於製作該網點223之印刷材質中未加入可 吸收長波段光線之材質時之光能量強度/波長曲線，該第 二曲線420為本發明用於製作該網點223之印刷材質中加 入少量奈米氧化鋅後之光能量強度/波長曲線。根據該頻 譜圖可以得到，本發明之液晶顯示裝置200中，用於製作 該網點2 2 3之印刷材質中加入少量奈米氧化鋅後，在黑晝 面時，在該液晶面板210表面，波長為700奈米以下之光 線之光能量強度基本不受影響，該第一曲線410及該第二 曲線420在此頻譜段基本重合；而該第二曲線420中，由 於波長為700奈米以上之光線被奈米氧化鋅很好地吸收， 在該頻譜段中，該液晶面板210表面之光能量強度基本下 降至零，不會出現該第一曲線410中此頻譜段在該液晶面 095143003 表單編號A0101 第8頁/共18頁 0993339266-0 1335470 099年09月21日梭正替換頁 板210表面之光能量強度仍存在之情況。根據該頻譜圖， 經過積分計算可得到，本發明之液晶顯示裝置200中，用 於製作該網點223之印刷材質中加入少量奈米氧化鋅後， 在黑畫面時該液晶顯示裝置200之亮度降為該印刷材質中 未加入可吸收長波段光線之材質時之91. 0%。 [0022] 請參照圖5，係該液晶顯示裝置200在白畫面時該液晶面 板210表面之光能量強度頻譜圖。該頻譜圖係表示白畫面 時該液晶面板210表面之光能量強度與光線波長之關係曲 線，其包括一第一曲線510及一第二曲線520，其中該第 一曲線510為用於製作該網點223之印刷材質中未加入可 吸收長波段光線之材質時之光能量強度/波長曲線，該第 二曲線520為本發明用於製作該網“ 22 3之印刷材質中加 入少量奈米氧化辞後之光能量強度/波長曲線。根據該頻 譜圖可以得到，本發明之液晶顯示裝置200中，用於製作 該網點223之印刷材質中加入少量奈米氧化鋅後，在白晝 面時，在該液晶面板210表面，波長為700奈米以下之光 線之光能量強度基本不受影響，該第一曲線510及該第二 曲線520在此頻譜段基本重合；而該第二曲線520中，由 於波長為700奈米以上之光線被奈米氧化辞所吸收，在該 頻譜段，該液晶面板210表面之光能量強度基本下降至零 ，不會出現該第一曲線510中此頻譜段在該液晶面板210 表面之光能量強度仍存在之情況。根據該頻譜圖，經過 積分計算可得到，本發明之液晶顯示裝置200中，用於製 作該網點223之印刷材質中加入少量奈米氧化鋅後，在白 畫面時該液晶顯示裝置200之亮度下降為該印刷材質中未 095143003 表單編號A0101 第9頁/共18頁 0993339266-0 1335470 099年09月21日修正替換頁 [0023] [0024] [0025] [0026] [0027] [0028] [0029] 095143003 加入可吸收長波段光線之材質時之98. 2%。 由此可得，本發明之液晶顯示裝置200之對比度提昇比率 為98. 2%/91. 0%=108%。也就是說，本發明之液晶顯示 裝置200，在用於製作該網點223之印刷材質中加入少量 能吸收長波段光線之奈米氧化鋅後，其黑晝面及白晝面 亮度分別得到調整，而黑晝面亮度之下降比例遠高於白 畫面。因此，相較於先前技術，該液晶顯示裝置200之對 比度可以得到8%之提高。 惟，本發明液晶顯示裝置200並不限於以上實施例所描述 。如，該導光板221還可為楔型或碟型，其底面226可為 弧形曲面；該複數網點223還可為圓台型、圓錐型、半球 面型或棱台型等其他規則之幾何形狀等。 綜上所述，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方式，本 發明之範圍並不以上述實施方式為限，舉凡熟悉本案技 藝之人士，在援依本案發明精神所作之等效修飾或變化 ，皆應包含於以下申請專利範圍内。 【圖式簡單說明】 圖1係一種先前技術液晶顯示裝置之結構圖。 圖2係本發明一種較佳實施方式所揭示之液晶顯示裝置之 結構示意圖。 圖3係本發明液晶顯示裝置在黑晝面時之穿透頻譜圖。 圖4係本發明液晶顯示裝置在黑晝面時之光能量強度頻譜 圖。 表單编號A0101 第10頁/共18頁 0993339266-0 1335470 099年09月21日核正替換頁 [0030] 圖5係本發明液晶顯示裝置在白畫面時之光能量強度頻譜 圖。 【主要元件符號說明】 [0031] 液晶顯示裝置：200 [0032] 第二相位補償膜： 216 [0033] 液晶面板· 21 0 [0034] 第二偏光片：217 [0035] 背光模組：220 [0036] 導光板：221 [0037] 第一偏光片：211 [0038] 光源：222 [0039] 第一相位補償膜： 212 [0040] 網點：22 3 [0041] 第一基板：213 [0042] 入光面：2 2 4 [0043] 液晶層：214 [0044] 出光面：225 [0045] 第二基板：215 [0046] 底面：226 095143003 表單編號A0101 第11頁/共18頁 0993339266-0[0019] Compared with the prior art, the liquid crystal display device 2 of the present invention adds a material capable of absorbing long-wavelength light to the printing material of the dot 223 of the light guide plate 221, so that the light emitted by the light source 222 When the light is applied to the dot 223, the long-wavelength light is effectively absorbed by the dot 223 printed by the printed material. This prevents the liquid crystal display device 200 from transmitting the light to the first polarizer 221 during the dark bear. The light leakage is generated, the transmittance of the liquid crystal display device 2 is reduced when the state is supplied, and the brightness of the black screen is reduced, and the contrast of the liquid crystal display device 200 is improved. [0020] Please refer to FIG. 3, which is a transmission spectrum diagram of the liquid crystal display device 200 in a black screen. The spectrum diagram shows a relationship between the transmittance of the liquid crystal display device 2 and the wavelength of the light when the black screen is displayed. The first graph 310 is used for the first curve 31〇 and the second curve 320. The transmittance/wavelength curve of the material for absorbing the long-wavelength light is not added to the printing material of the dot 223, and the second curve 320 is used for making the net 095143003 for the present invention. Form No. A0101 Page 7 of 18 Page 0993339266-0 1335470 September 21, 099 Correction of the transmittance/wavelength curve of a small amount of nano zinc oxide added to the printed material of the replacement page 223. According to the spectrogram, in the liquid crystal display device 200 of the present invention, a small amount of nano zinc oxide is added to the printing material for fabricating the dot 223, and the light having a wavelength of 700 nm or less is penetrated in a black screen. The rate is substantially unaffected, the first curve 310 and the second curve 320 are substantially coincident in the spectrum segment; and in the second curve 320, the light having a wavelength of 700 nm or more is well absorbed by the nano zinc oxide. Therefore, the second curve 320 does not appear as in the first curve 310, in a spectrum segment having a wavelength of 700 nm or more, and the transmittance suddenly increases significantly. [0021] Please refer to FIG. 4 , which is a spectrum diagram of light energy intensity of the surface of the liquid crystal panel 210 when the liquid crystal display device 200 is in a black surface. The spectrum diagram shows a relationship between the intensity of the light energy of the surface of the liquid crystal panel 21 and the wavelength of the light when the black screen is displayed, and includes a first curve 410 and a second curve 420, wherein the first curve 410 is used to create the The light energy intensity/wavelength curve of the material of the dot 223 is not added to the material of the long-wavelength light, and the second curve 420 is a small amount of nano zinc oxide added to the printing material for forming the dot 223 of the present invention. Light energy intensity / wavelength curve. According to the spectrogram, in the liquid crystal display device 200 of the present invention, a small amount of nano zinc oxide is added to the printing material for fabricating the dot 2 2 3 , and the surface of the liquid crystal panel 210 is on the black surface. The light energy intensity of the light below 700 nm is substantially unaffected, and the first curve 410 and the second curve 420 substantially coincide in the spectrum segment; and in the second curve 420, the wavelength is 700 nm or more. The light is well absorbed by the nano zinc oxide. In the spectrum segment, the light energy intensity of the surface of the liquid crystal panel 210 is substantially reduced to zero, and the spectrum segment in the first curve 410 does not appear on the liquid crystal surface 095143003. A0101 Page 8 of 18 0993339266-0 1335470 On September 21, 099, the shuttle is replacing the light energy intensity on the surface of the page 210. According to the spectrogram, it is obtained by integral calculation that in the liquid crystal display device 200 of the present invention, after a small amount of nano zinc oxide is added to the printing material for fabricating the dot 223, the brightness of the liquid crystal display device 200 is lowered in a black screen. 0. 0%。 The printing material is not added to absorb the material of the long-wavelength light 91.0%. [0022] Please refer to FIG. 5, which is a frequency energy intensity spectrum diagram of the surface of the liquid crystal panel 210 in the white screen of the liquid crystal display device 200. The spectrum diagram shows a relationship between the intensity of the light energy of the surface of the liquid crystal panel 210 and the wavelength of the light when the white screen is displayed, and includes a first curve 510 and a second curve 520, wherein the first curve 510 is used to create the dot. The light energy intensity/wavelength curve of the material of the 223 is not added to the material of the long-wavelength light, and the second curve 520 is used in the printing material of the invention for adding a small amount of nano-oxidation. According to the spectrogram, in the liquid crystal display device 200 of the present invention, after a small amount of nano zinc oxide is added to the printing material for fabricating the dot 223, the liquid crystal is used in the white enamel surface. On the surface of the panel 210, the light energy intensity of the light having a wavelength of 700 nm or less is substantially unaffected, and the first curve 510 and the second curve 520 substantially coincide with each other in the spectrum segment; and in the second curve 520, the wavelength is The light above 700 nm is absorbed by the nanometer oxidation, in which the light energy intensity of the surface of the liquid crystal panel 210 is substantially reduced to zero, and the first curve 5 does not appear. The intensity of the light energy of the spectrum segment on the surface of the liquid crystal panel 210 is still present in 10. According to the spectrogram, the liquid crystal display device 200 of the present invention is used in the printing material for fabricating the dot 223. After adding a small amount of nano zinc oxide, the brightness of the liquid crystal display device 200 is reduced to 095,143,003 in the printing material on the white screen. Form No. A0101 Page 9/18 pages 0993339266-0 1335470 Correction replacement page on September 21, 099 [0028] [0029] [0029] [0029] 095143003 When the material of the long-wavelength light is absorbed, 98.2% is obtained. Thus, the liquid crystal display device 200 of the present invention is obtained. The contrast enhancement ratio is 98.2%/91. 0%=108%. That is, the liquid crystal display device 200 of the present invention adds a small amount of nanometer capable of absorbing long-wavelength light to the printing material used to fabricate the dot 223. After the zinc oxide, the brightness of the black and white surface is adjusted, and the brightness of the black surface is much lower than that of the white screen. Therefore, compared with the prior art, the contrast of the liquid crystal display device 200 can be 8%. improve However, the liquid crystal display device 200 of the present invention is not limited to the above embodiments. For example, the light guide plate 221 may also be a wedge-shaped or dish-shaped shape, and the bottom surface 226 may be a curved curved surface; the plurality of dots 223 may also be a truncated cone Other rules, such as type, cone type, hemispherical shape or prism type, etc. In summary, the invention complies with the invention patent requirements, and patent application is filed according to law. However, the above is only the comparison of the present invention. The scope of the present invention is not limited to the above-described embodiments, and equivalent modifications or variations made by those skilled in the art will be included in the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a structural view of a prior art liquid crystal display device. Fig. 2 is a schematic view showing the structure of a liquid crystal display device according to a preferred embodiment of the present invention. Fig. 3 is a perspective view showing the penetration spectrum of the liquid crystal display device of the present invention on a black surface. Fig. 4 is a spectrum diagram showing the light energy intensity of the liquid crystal display device of the present invention on a black surface. Form No. A0101 Page 10 of 18 0993339266-0 1335470 September 21, 2009, Nuclear Replacement Page [0030] FIG. 5 is a spectrum diagram of light energy intensity of a liquid crystal display device of the present invention in a white screen. [Main component symbol description] [0031] Liquid crystal display device: 200 [0032] Second phase compensation film: 216 [0033] Liquid crystal panel · 21 0 [0034] Second polarizer: 217 [0035] Backlight module: 220 [ 0036] Light guide plate: 221 [0037] First polarizer: 211 [0038] Light source: 222 [0039] First phase compensation film: 212 [0040] Dot: 22 3 [0041] First substrate: 213 [0042] Glossy: 2 2 4 [0043] Liquid crystal layer: 214 [0044] Light-emitting surface: 225 [0045] Second substrate: 215 [0046] Bottom surface: 226 095143003 Form number A0101 Page 11 / Total 18 pages 0993339266-0