1345072 九、發明說明： 【發明所屬之技術領域】 本發明係關於一種電濕潤式顯示裝置。 【先前技術】 -如今，諸多光電技術正在快速的發展且應用於下 平板顯示器，如投影顯示器（Projecti〇n Display)、可 示器（Flexible Dispaly)等。在此環境下，—種基於=們 原理的顯示裝置由於其響應速度快、視角廣、耗電量小、 #輕薄便攜等優點受到廣泛的關注。 。月參閱圖1 ’係-種先前技術揭示之電濕潤式顯示掌 置中-子像素單元平面結構示意圖。該子像素單元i〇q • -狹長的長方形，其包括二相對之長邊(未標示)及二相對 2短邊（未標示），該子像素單元⑽之形㈣由—側 未示）限定’該側壁係採用疏水性材料製成。一矩形的薄膜 ^晶體元件m設置於該子像素單元⑽之μ處，並定 義該薄膜電晶體元件121與相對的子像素單元長邊之 間的，域為第-區域129。該薄膜電晶體元件ΐ2ι在該子 像素單元100短邊方向上的寬度約佔該短邊長度的三分之 —。一電極m對應該子像素單元1〇〇透光的區域設置， 即其形狀對應該子像素單元100除該薄膜電晶體元件ΐ2ι 外的區域。一疏水性絕緣層（圖未示）、一層油（圖未示）及一 層水（圖未示）依序設置於該薄膜電晶體元件i2i及該電極 上，且遍及整個該子像素單元1〇〇。其中，該子像素單 7G 100之面積為x ’該薄膜電晶體元件121之面積為y。 ’准’由於該子像素單元100為狹長之長方形，且該油 6 1345072 ί =壁之親和性，該油較易沿該子像素單元長邊的 严二#動，而不易沿短邊的方向移動。故該第一區域129 區域：應：=二移動至該薄膜電晶體元件121所對應的 121 “ ^時仍然遮蔽約三倍薄膜電晶體元件 Γ3?/積的透光區域(即該第-區域吻，實際開口率為 r y)/x ,造成該電濕潤式顯示裝置開口率較低。 【發明内容】 ' 為4鐘於此，提供-種開口率較高之電濕潤式顯示裝置實 _ ^種電濕潤式顯示裝置’其包括複數矩形之子像 ΓΓ/像素單元包括二相對之長邊及二相對之短邊，、至 f早70包括—第—基板；—與該第—基板相對之第 ，反’ I電的第一液體’夾於該第一基板與第二基板之 =，一非極性的第二液體，夾於該第一基板盥第二美 二體互不相容;一電極設置於該第二基板靠 ::液體之表面；其中，該電極包括一開口，該開口於 上的投影長度與該短邊長度之比大於等於且小於 與先前技術相比，本發明之電濕潤式顯示裝置由於其電 σ沿該子像素單元短邊方向上的最大長度與該短邊 =度=比大於等於08且小於等於工，使在同樣的開口面積 :，曰恕時該第二液體可以較多的收縮進該開口所對應之區 域，使該電濕潤式顯示裝置開口率較高。 【實施方式】 請參閱圖2,係本發明電濕潤式顯示裝置第一實施方 7 1345072 • ^ « ; 式之平面結構示意圖。該電濕潤式顯示裝置4可實現彩色 . 顯示，其包括複數呈矩陣排列之像素單元40，每一像素單 元40包括三子像素單元400。每一像素單元40所包括的 三子像素單元400分別呈紅、綠及藍色，以使該像素單元 40可以實現全色彩顯示。該子像素單元400為一狹長的長 方形，以使三子像素單元400所組成的像素單元40為一近 似正方形的形狀以獲得較佳的視覺效果。 請參閱圖3，係圖2所示電濕潤式顯示裝置4之一子 鲁像素單元400的放大剖視結構示意圖。該子像素單元400 包括一上基板41、一與其相對之下基板42及設置於該二 基板41、42之間的四側壁43，該四側壁43依序首尾相接 與該二基板41、42形成一收容空間44。該上基板41係使 ' 用透明材料製成，如玻璃或塑膠。 - 該收容空間44由互不相融的一第一液體45及一第二 液體46充滿。該第一液體45可以是水或鹽溶液等導電液 體或極性液體，如氯化鉀（KC1)溶解於水和普通酒精（Ethyl # Alcohol)混合液後所形成的溶液。該第二液體46可以是著 黑色的鏈烷或烷烴（Alkane)等非極性液體，如十六烷 (Hexadecane)或油，以作為一種遮蔽液體。 該子像素單元400還包括一電極421、一驅動元件422 及一絕緣層423。該電極421及該驅動元件422設置於該 下基板42鄰近該收容空間44之表面，該絕緣層423設置 於該電極421及該驅動元件422上且遍及整個子像素單元 400。該絕緣層423由疏水性材料製成，如無定型的含氟聚 合物（Amorphous Fluoropolymer)。 8 1345072 - 請參閱圖4，係圖3所示子像素單元400之平面結構 . 示意圖。該長方形的子像素單元400包括二相對之長邊401 及二相對之短邊402。其中，該子像素單元400之面積為X。 •該電極421包括一矩形的開口 429，其設置於該子像素單 元400之一短邊402處，且該開口 429沿該子像素單元400 短邊402方向的長度與該短邊402長度相同，即該開口 429 於該短邊402上的投影長度與該短邊402相同。該電極421 亦呈一矩形，該電極421沿該子像素單元400短邊402方 鲁向的長度與該短邊402長度相同，該電極421沿該子像素 單元400長邊401方向的長度小於該長邊401長度。該驅 動元件422為一不透光之元件，其形狀與該開口 429 —致， 其面積為y，並對應該開口 429設置。 ' 當該第一液體45與該電極421之間不存在電壓差時， - 由於該絕緣層423之疏水性，即由於該絕緣層423、第一 液體45及第二液體46三者之間的表面張力（Interfacial Tension)作用，該第二液體46充分覆蓋該絕緣層423。由 #於該第二液體46呈黑色，吸收了絕大部份入射之光束，故 此時之子像素單元400為暗態（Off State)。 當一電壓差加載於該第一液體45與該電極421上時， 電荷的重新分佈破壞了暗態時分子張力的平衡態，即此時 庫倫力的介入使該第一液體45傾向於接觸該絕緣層423 對應該電極421之區域。該絕緣層423對應該開口 429之 部份仍可以體現疏水性，故該第一液體45會將該第二液體 46排向該開口 429處，從而實現亮態（On State)。 由於該開口 429於該短邊402上的投影長度與該短邊 9 1345072 術長度相同’從而該第二液體46沿該長邊撕方向 並完全收縮到該開口 429所對應的區二 49Q #4. 1 入田於該開口 十應之區域為該驅動元件422,故該子像素單元4〇〇 之開口率為（x-y)/x。 •相較於先前技術，本發明之電濕潤式顯示裝置由於其1345072 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to an electrowetting display device. [Prior Art] - Today, many optoelectronic technologies are rapidly developing and applied to lower panel displays such as Projection displays, Flexible Dispaly, and the like. In this environment, the display device based on the principle of the ones has been widely concerned due to its fast response speed, wide viewing angle, low power consumption, and light and portable. . Referring to Fig. 1 is a schematic diagram showing the planar structure of the sub-pixel unit in the electrowetting display of the prior art. The sub-pixel unit i〇q • is an elongated rectangle including two opposite long sides (not labeled) and two opposite two short sides (not labeled), and the shape (4) of the sub-pixel unit (10) is defined by the side not shown 'The side wall is made of a hydrophobic material. A rectangular thin film crystal element m is disposed at the μ of the sub-pixel unit (10), and defines a region between the thin film transistor element 121 and the long side of the opposite sub-pixel unit, the domain being the first region 129. The width of the thin film transistor element ΐ2ι in the short side direction of the sub-pixel unit 100 is about three-thirds of the length of the short side. An electrode m is disposed in a region where the sub-pixel unit 1 is transparent to light, that is, a shape corresponding to a region of the sub-pixel unit 100 excluding the thin film transistor element ΐ2ι. A hydrophobic insulating layer (not shown), a layer of oil (not shown), and a layer of water (not shown) are sequentially disposed on the thin film transistor element i2i and the electrode, and throughout the sub-pixel unit. Hey. The area of the sub-pixel unit 7G 100 is x ’, and the area of the thin film transistor element 121 is y. Because the sub-pixel unit 100 is a long and narrow rectangle, and the oil 6 1345072 ί = wall affinity, the oil is relatively easy to move along the long side of the sub-pixel unit, and is not easy to follow the direction of the short side. mobile. Therefore, the first region 129 region: should be: = two moved to the thin film transistor corresponding to the thin film transistor 121 121, still obscuring about three times the thin film transistor element Γ 3? / product of the light-transmitting region (ie, the first region Kiss, the actual aperture ratio is ry) / x, resulting in a low aperture ratio of the electrowetting display device. [Summary of the invention] ' For 4 minutes, provide an electrowetting display device with a high aperture ratio _ ^ An electrowetting display device comprising: a plurality of rectangular sub-images/pixel units including two opposite long sides and two opposite short sides, to f early 70 including a --substrate; - opposite to the first substrate a first liquid that is sandwiched between the first substrate and the second substrate, and a non-polar second liquid that is incompatible with the first substrate and the second body; an electrode Provided on the surface of the second substrate:: liquid; wherein the electrode includes an opening, the ratio of the projected length of the opening to the length of the short side is greater than or equal to and less than the electrowetting of the present invention compared to the prior art. Display device because its electrical σ is along the short side of the sub-pixel unit The maximum length on the upper side and the short side = degree = ratio is greater than or equal to 08 and less than or equal to the work, so that in the same opening area: the second liquid can be more retracted into the area corresponding to the opening, so that The electrowetting display device has a high aperture ratio. [Embodiment] Please refer to FIG. 2, which is a schematic diagram of a planar structure of a first embodiment of the electrowetting display device of the present invention 7 1345072 • ^ « . A color display can be implemented, which includes a plurality of pixel units 40 arranged in a matrix, each pixel unit 40 including three sub-pixel units 400. Each of the three sub-pixel units 400 included in each pixel unit 40 is red, green, and blue. Therefore, the pixel unit 40 can realize full color display. The sub-pixel unit 400 is an elongated rectangle, so that the pixel unit 40 composed of the three sub-pixel units 400 has an approximately square shape to obtain a better visual effect. Please refer to FIG. 3 , which is a schematic cross-sectional structural view of a sub-pixel unit 400 of the electrowetting display device 4 shown in FIG. 2. The sub-pixel unit 400 includes an upper substrate 41 and a The substrate 42 and the four side walls 43 disposed between the two substrates 41 and 42 respectively form a receiving space 44 with the two substrates 41 and 42 in series with each other. The upper substrate 41 is made to be ' Made of a transparent material, such as glass or plastic. - The receiving space 44 is filled with a first liquid 45 and a second liquid 46 which are incompatible with each other. The first liquid 45 may be a conductive liquid such as water or a salt solution or A solution of a polar liquid such as potassium chloride (KC1) dissolved in a mixture of water and an ordinary alcohol (Ethyl #Alcohol). The second liquid 46 may be a black paraffin or a non-polar liquid such as an alkane (Alkane). , such as Hexadecane or oil, as a masking liquid. The sub-pixel unit 400 further includes an electrode 421, a driving element 422, and an insulating layer 423. The electrode 421 and the driving component 422 are disposed on the surface of the lower substrate 42 adjacent to the receiving space 44. The insulating layer 423 is disposed on the electrode 421 and the driving component 422 and extends through the entire sub-pixel unit 400. The insulating layer 423 is made of a hydrophobic material such as an amorphous fluorine polymer (Amorphous Fluoropolymer). 8 1345072 - Please refer to FIG. 4, which is a plan view of the planar structure of the sub-pixel unit 400 shown in FIG. The rectangular sub-pixel unit 400 includes two opposite long sides 401 and two opposite short sides 402. The area of the sub-pixel unit 400 is X. The electrode 421 includes a rectangular opening 429 disposed at a short side 402 of the sub-pixel unit 400, and the length of the opening 429 along the short side 402 of the sub-pixel unit 400 is the same as the length of the short side 402. That is, the projection length of the opening 429 on the short side 402 is the same as the short side 402. The electrode 421 also has a rectangular shape. The length of the electrode 421 along the short side 402 of the sub-pixel unit 400 is the same as the length of the short side 402. The length of the electrode 421 along the long side 401 of the sub-pixel unit 400 is smaller than the length. Long side 401 length. The driving element 422 is an opaque element having a shape that is identical to the opening 429 and has an area y that is disposed in the opening 429. 'When there is no voltage difference between the first liquid 45 and the electrode 421, - due to the hydrophobicity of the insulating layer 423, that is, due to the insulation layer 423, the first liquid 45 and the second liquid 46 The surface tension (Interfacial Tension) acts to sufficiently cover the insulating layer 423. Since the second liquid 46 is black, most of the incident light beam is absorbed, so the sub-pixel unit 400 at this time is in an off state. When a voltage difference is applied to the first liquid 45 and the electrode 421, the redistribution of charge destroys the equilibrium state of the molecular tension in the dark state, that is, the intervention of the Coulomb force causes the first liquid 45 to tend to contact the The insulating layer 423 corresponds to the region of the electrode 421. The portion of the insulating layer 423 corresponding to the opening 429 can still exhibit hydrophobicity, so that the first liquid 45 will discharge the second liquid 46 toward the opening 429 to achieve an On State. Since the projection length of the opening 429 on the short side 402 is the same as the length of the short side 9 1345072, the second liquid 46 is torn along the long side and is completely contracted to the area corresponding to the opening 429. 1 The area in which the opening is applied to the opening is the driving element 422, so the aperture ratio of the sub-pixel unit 4 is (xy) / x. • Compared to the prior art, the electrowetting display device of the present invention is
4電429於該短邊4G2上的投影長度與該短邊 長度相同’在暗態時該第二液體可以全部收縮進該開 口 42二所對應之區域，使該電濕潤式顯示|置開口率較高。 、請參閱圖5，係本發明電濕潤式顯示裝置第二實施方 式之結構示意圖。本實施方式之電濕潤式顯示裝置鱼第一 實施方式之電濕潤式顳示裝置之區別在於：電極52ι、包括 一，殊形狀之開口 529，其設置於該子像素單元5〇〇之一 角洛處，該電極521對應該開口 529之邊緣為一曲線。該 開口 529沿該子像素單&谓短邊5()2方向的最大長度與 該短邊502長度之比為大於等於〇 8且小與丄，即該開口 汹於該短邊5G2上的投影長度與該短邊長度之比為大於 等於0.8且小與1。該驅動元件522為一不透光之元件， 其對應該開口 529設置。 相較於第一實施方式’本發明之電濕潤式顯示裝置由 於其電極521之該開口 529沿該子像素單元5〇〇短邊5〇2 方向的最大長度與該短邊502長度之比為在〇8到i之 間，可以使該驅動元件522與該子像素單元5〇〇邊緣保持 一定距離，從而減少該驅動元件522與其他元件的串擾。 亦對製程精度要求較低。同時，開口率不小於（x_i25y)/x， 使該電濕潤式顯示裝置開口率亦較大。 1345072 |示上所述’本發明確已符合發明之要件，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 藝之人士援依本發明之精神所作之等效修㈣變=，皆 垮蓋於以下申請專利範圍内。 w 【圖式簡單說明】 圖1係-種先前技術揭示之電濕潤式 單元平面結構示意圖。 子像 圖:::發明電濕潤式顯示裝置第-實施方式之平面結構 式顯示裝置之一子像素單元的放大 圖3係圖2所示電濕潤 剖視結構示意圖。 園4係圖3所示子像素單元之 圖5係本發明電濕潤 ：.：思圖。 單元之平面結構示意圖y裝置^實施方式之一子傷 【主要元件符號說明】 電濕潤式顯示裝置 像素單元 上基板 下基板 側壁 4 40 41 42 收容空間 第一液體 第二液體 子像素單元 長邊 43 44 45 46 400 、 500 11 401 1345072 短邊 402 電極 421 驅動元件 422 絕緣層 開口 429 502 521 522 423 529The projection length of the 4 electric 429 on the short side 4G2 is the same as the length of the short side. In the dark state, the second liquid can be completely shrunk into the area corresponding to the opening 42 to make the electrowetting display | Higher. Referring to Fig. 5, it is a schematic structural view of a second embodiment of the electrowetting display device of the present invention. The electrowetting display device of the first embodiment of the present invention differs from the electrowetting device of the first embodiment in that the electrode 521 includes an opening 529 of a special shape, which is disposed at a corner of the sub-pixel unit 5 At this point, the electrode 521 has a curve corresponding to the edge of the opening 529. The ratio of the maximum length of the opening 529 along the sub-pixel single & short side 5 () 2 direction and the length of the short side 502 is greater than or equal to 〇 8 and small and 丄, that is, the opening is on the short side 5G2 The ratio of the projected length to the length of the short side is greater than or equal to 0.8 and small and one. The drive element 522 is an opaque element that is disposed corresponding to the opening 529. Compared with the first embodiment, the electrowetting display device of the present invention has a ratio of the maximum length of the opening 529 of the electrode 521 along the short side 5〇2 of the sub-pixel unit 5 to the length of the short side 502. Between 8 and i, the drive element 522 can be kept at a distance from the edge of the sub-pixel unit 5, thereby reducing crosstalk between the drive element 522 and other elements. It also requires low process accuracy. At the same time, the aperture ratio is not less than (x_i25y)/x, so that the aperture ratio of the electrowetting display device is also large. 1345072 | Shown on the above] The present invention has indeed met the requirements of the invention, and has filed a patent application in accordance with the law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to make an equivalent repair according to the spirit of the present invention. All are covered by the following patent application. w [Simplified description of the drawings] Fig. 1 is a schematic diagram showing the planar structure of an electrowetting cell disclosed in the prior art. Sub-image::: Inventive electrowetting display device - Planar structure of the embodiment - Magnification of one sub-pixel unit of the display device Fig. 3 is a schematic view of the electrowetting cross-sectional structure shown in Fig. 2. Figure 5 is a sub-pixel unit shown in Figure 3. Figure 5 is an electrowetting of the present invention: . Schematic diagram of the planar structure of the unit y device ^ one of the embodiments of the sub-injury [main symbol description] electrowetting display device pixel unit upper substrate lower substrate side wall 4 40 41 42 housing space first liquid second liquid sub-pixel unit long side 43 44 45 46 400 , 500 11 401 1345072 Short side 402 electrode 421 Drive element 422 Insulation opening 429 502 521 522 423 529
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