TWI408575B - Touch panel and displaying device using the same - Google Patents
Touch panel and displaying device using the same Download PDFInfo
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本發明涉及一種觸摸屏及顯示裝置,尤其涉及一種採用奈米碳管作透明導電層的觸摸屏及使用該觸摸屏的顯示裝置。 The invention relates to a touch screen and a display device, in particular to a touch screen using a carbon nanotube as a transparent conductive layer and a display device using the same.
近年來,伴隨著移動電話與觸摸導航系統等各種電子設備的高性能化和多樣化的發展,在液晶等顯示設備的前面安裝透光性的觸摸屏的電子設備逐步增加。這樣的電子設備的利用者通過觸摸屏,一邊對位於觸摸屏背面的顯示設備的顯示內容進行視覺確認,一邊利用手指或筆等方式按壓觸摸屏來進行操作。故,可以操作電子設備的各種功能。 In recent years, with the development of high performance and diversification of various electronic devices such as mobile phones and touch navigation systems, electronic devices in which a translucent touch panel is mounted on the front surface of a display device such as a liquid crystal are gradually increasing. The user of such an electronic device operates the display content of the display device located on the back surface of the touch panel by visually checking the touch panel while pressing the touch panel by a finger or a pen. Therefore, various functions of the electronic device can be operated.
按照觸摸屏的工作原理和傳輸介質的不同,先前技術中的觸摸屏分為四種類型,分別為電阻式、電容式、紅外線式以及表面聲波式。其中電容式觸摸屏因準確度較高、抗幹擾能力强應用較為廣泛。 According to the working principle of the touch screen and the transmission medium, the touch screens in the prior art are divided into four types, namely, resistive, capacitive, infrared, and surface acoustic wave. Among them, the capacitive touch screen is widely used due to its high accuracy and strong anti-interference ability.
先前技術中的電容式觸摸屏(請參見“連續薄膜電容式觸摸屏的研究”,李樹本等,光電子技術,Vol.15,p62(1995))包括一玻璃基板,一透明導電層,以及多個金屬電極。在該電容式觸摸屏中,玻璃基板的材料為鈉鈣玻璃。透明導電層為例如銦錫氧化物(ITO)或銻錫氧化物(ATO)等透明材料。電極為通過印製具有低電阻的導電金屬(例如銀)形成。電極間隔設置在透明導電層的各個角處。此外,透明導電層上塗覆有防護層。該防 護層由液體玻璃材料通過硬化或緻密化工藝,並進行熱處理後,硬化形成。 Prior art capacitive touch screens (see "Research on Continuous Thin Film Capacitive Touch Screens", Li Shuben et al., Optoelectronics Technology, Vol. 15, p. 62 (1995)) include a glass substrate, a transparent conductive layer, and a plurality of metal electrodes. . In the capacitive touch panel, the material of the glass substrate is soda lime glass. The transparent conductive layer is a transparent material such as indium tin oxide (ITO) or antimony tin oxide (ATO). The electrode is formed by printing a conductive metal (for example, silver) having a low electrical resistance. The electrode spacing is disposed at each corner of the transparent conductive layer. Further, the transparent conductive layer is coated with a protective layer. The defense The sheath is formed by a hardening or densification process of the liquid glass material, followed by heat treatment.
當手指等觸摸物觸摸在觸摸屏表面上時,由於人體電場,手指等觸摸物和觸摸屏中的透明導電層之間形成一個耦合電容。對於高頻電流來說,電容為直接導體,手指等觸摸物的觸摸將從接觸點吸走一個很小的電流。這個電流分別從觸摸屏上的電極中流出,並且流經這四個電極的電流與手指到四角的距離成正比,觸摸屏控製器通過對這四個電流比例的精確計算,得出觸摸點的位置。 When a touch object such as a finger touches the surface of the touch screen, a coupling capacitance is formed between the touch object such as a finger and the transparent conductive layer in the touch screen due to the human body electric field. For high-frequency currents, the capacitor is a direct conductor, and the touch of a finger or the like will draw a small current from the contact point. This current flows out of the electrodes on the touch screen, respectively, and the current flowing through the four electrodes is proportional to the distance from the finger to the four corners. The touch screen controller obtains the position of the touch point by accurately calculating the ratio of the four currents.
故,透明導電層對於觸摸屏為一必需的部件,先前技術中透明導電層通常採用ITO層,然,ITO層作為透明導電層具有機械和化學耐用性不够好等缺點。進一步地,採用ITO層作透明導電層存在電阻阻值分布不均勻的現象,導致先前技術中的電容式觸摸屏存在觸摸屏的分辨率低、精確度不高等問題。 Therefore, the transparent conductive layer is an essential component for the touch screen. In the prior art, the transparent conductive layer usually adopts an ITO layer. However, the ITO layer as a transparent conductive layer has disadvantages such as insufficient mechanical and chemical durability. Further, the use of the ITO layer as the transparent conductive layer has a phenomenon in that the resistance value distribution is uneven, which causes the capacitive touch screen of the prior art to have problems such as low resolution and low precision of the touch screen.
有鑒於此,確有必要提供一種分辨率高、精確度高及耐用的觸摸屏,以及使用該觸摸屏的顯示裝置。 In view of this, it is indeed necessary to provide a touch screen having high resolution, high precision, and durability, and a display device using the touch screen.
一種觸摸屏,該觸摸屏包括一基體;一透明導電層,該透明導電層設置於上述基體的表面;以及多個電極,該多個電極分別間隔設置,並與該透明導電層電連接。其中,所述透明導電層進一步包括一奈米碳管層,該奈米碳管層包括平行且間隔設置的由奈米碳管組成的多個奈米碳管帶狀膜結構,所述每個奈米碳管帶狀膜結構的兩端分別與兩個相對的電極電連接,且所述每個電極與至 少一個奈米碳管帶狀膜結構的一端電連接。 A touch screen includes a substrate; a transparent conductive layer disposed on a surface of the substrate; and a plurality of electrodes respectively spaced apart and electrically connected to the transparent conductive layer. Wherein, the transparent conductive layer further comprises a carbon nanotube layer comprising a plurality of carbon nanotube ribbon-like membrane structures consisting of carbon nanotubes arranged in parallel and spaced apart, wherein each of the nano-tubes Two ends of the carbon nanotube film-like film structure are electrically connected to two opposite electrodes, respectively, and each of the electrodes is One end of the carbon nanotube strip film structure is electrically connected.
一種顯示裝置,其包括一觸摸屏,該觸摸屏包括一基體;一透明導電層,該透明導電層設置於上述基體的表面;以及多個電極,該多個電極分別間隔設置,並與該透明導電層電連接;一顯示設備,該顯示設備正對且靠近觸摸屏的基體遠離透明導電層的一個表面設置。其中,所述透明導電層進一步包括一奈米碳管層,該奈米碳管層包括平行且間隔設置的由奈米碳管組成的多個奈米碳管帶狀膜結構,所述每個奈米碳管帶狀膜結構的兩端分別與兩個相對的電極電連接,且所述每個電極與至少一個奈米碳管帶狀膜結構的一端電連接。 A display device comprising a touch screen comprising a substrate; a transparent conductive layer disposed on a surface of the substrate; and a plurality of electrodes respectively spaced apart from the transparent conductive layer Electrical connection; a display device disposed adjacent to a surface of the touch screen and away from a surface of the transparent conductive layer. Wherein, the transparent conductive layer further comprises a carbon nanotube layer comprising a plurality of carbon nanotube ribbon-like membrane structures consisting of carbon nanotubes arranged in parallel and spaced apart, wherein each of the nano-tubes Both ends of the carbon nanotube film-like film structure are electrically connected to two opposite electrodes, respectively, and each of the electrodes is electrically connected to one end of at least one of the carbon nanotube film-like film structures.
與先前技術的觸摸屏及顯示裝置相比較,本技術方案提供的觸摸屏及顯示裝置具有以下優點:其一,由於透明導電層中的多個奈米碳管帶狀膜結構平行且間隔設置,因此,所述透明導電層具有較好的力學性能,從而使得上述的透明導電層具有較好的機械强度和韌性,故,採用上述的奈米碳管帶狀膜結構作透明導電層,可以相應的提高觸摸屏的耐用性,進而提高了使用該觸摸屏的顯示裝置的耐用性;其二,上述透明導電層中的多個奈米碳管帶狀膜結構平行且間隔設置,從而使得透明導電層具有均勻的阻值分布和透光性,且所述每個電極與其所在透明導電層中的至少一個奈米碳管帶狀膜結構的一端電連接,故可以通過探測觸摸點處與奈米碳管帶狀膜結構相連接的兩個電極之間的電流變化來更精確地確定觸摸點的位置,從而有利於提高觸摸屏及使用該觸摸屏的 顯示裝置的分辨率和精確度。 Compared with the touch screen and the display device of the prior art, the touch screen and the display device provided by the technical solution have the following advantages: First, since the plurality of carbon nanotube film films in the transparent conductive layer are parallel and spaced apart, The transparent conductive layer has good mechanical properties, so that the transparent conductive layer has good mechanical strength and toughness. Therefore, the above-mentioned carbon nanotube film structure can be used as a transparent conductive layer, which can be correspondingly improved. The durability of the touch screen further improves the durability of the display device using the touch screen; secondly, the plurality of carbon nanotube film films in the transparent conductive layer are parallel and spaced apart, so that the transparent conductive layer has uniformity a resistance distribution and a light transmissive property, and each of the electrodes is electrically connected to one end of at least one of the carbon nanotube strip-shaped film structures in the transparent conductive layer, so that the touched point and the carbon nanotube band can be detected The change in current between the two electrodes connected to the membrane structure to more accurately determine the position of the touch point, thereby facilitating the improvement of the touch screen and the use of the touch Screen The resolution and accuracy of the display device.
以下將結合附圖對本技術方案作進一步的詳細說明。 The technical solution will be further described in detail below with reference to the accompanying drawings.
請參閱圖1、圖2及圖3,觸摸屏20包括一基體22、一透明導電層24、一防護層26及至少多個電極28。基體22具有一第一表面221以及與第一表面221相對的第二表面222。透明導電層24設置在基體22的第一表面221上;所述多個電極28分別間隔設置,且與透明導電層24形成電連接,用以在透明導電層24上形成等電位面。防護層26可直接設置在透明導電層24以及電極28上。優選地,所述多個電極28間隔設置在所述透明導電層24相對的兩端。 Referring to FIG. 1 , FIG. 2 and FIG. 3 , the touch screen 20 includes a substrate 22 , a transparent conductive layer 24 , a shielding layer 26 and at least a plurality of electrodes 28 . The base 22 has a first surface 221 and a second surface 222 opposite the first surface 221. The transparent conductive layer 24 is disposed on the first surface 221 of the substrate 22; the plurality of electrodes 28 are respectively spaced apart and electrically connected to the transparent conductive layer 24 for forming an equipotential surface on the transparent conductive layer 24. The protective layer 26 can be disposed directly on the transparent conductive layer 24 and the electrode 28. Preferably, the plurality of electrodes 28 are spaced apart at opposite ends of the transparent conductive layer 24.
所述基體22為一曲面型或平面型的結構。該基體22由玻璃、石英、金剛石或塑料等硬性材料或柔性材料形成。所述基體22主要起支撑的作用。 The base 22 is a curved or planar structure. The base 22 is formed of a hard material such as glass, quartz, diamond or plastic or a flexible material. The base 22 serves primarily as a support.
所述透明導電層24包括平行且間隔設置的多個奈米碳管帶狀膜結構240,所述多個電極分別間隔設置在含有多個奈米碳管帶狀膜結構240的透明導電層24相對的兩端,所述每個奈米碳管帶狀膜結構240的兩端分別與兩個相對的電極電連接,且所述每個電極與所述透明導電層24中的至少一個奈米碳管帶狀膜結構240的一端電連接。具體地,所述多個電極28一一對應設置於奈米碳管帶狀膜結構240的兩端。 The transparent conductive layer 24 includes a plurality of carbon nanotube strip film structures 240 arranged in parallel and spaced apart, and the plurality of electrodes are respectively disposed at a transparent conductive layer 24 including a plurality of carbon nanotube strip film structures 240. The opposite ends of the carbon nanotube film structure 240 are respectively electrically connected to two opposite electrodes, and each of the electrodes and at least one of the transparent conductive layers 24 One end of the carbon tube strip film structure 240 is electrically connected. Specifically, the plurality of electrodes 28 are disposed one-to-one correspondingly at both ends of the carbon nanotube film structure 240.
所述奈米碳管帶狀膜結構240為一層奈米碳管薄膜,該奈米碳管薄膜包括多個定向排列的奈米碳管,且該多個奈 米碳管沿著奈米碳管帶狀膜結構240的長度方向排列。另外所述奈米碳管帶狀膜結構240也可為重叠設置的多層奈米碳管薄膜,每一奈米碳管薄膜包括多個定向排列的奈米碳管,且相鄰的兩層奈米碳管薄膜中的奈米碳管沿同一方向排列或沿不同方向排列。所述奈米碳管薄膜進一步包括多個首尾相連的奈米碳管束片段,每個奈米碳管束片段具有相等的長度且每個奈米碳管束片段由多個相互平行的奈米碳管束構成,所述多個奈米碳管束片段兩端通過凡德瓦爾力相互連接。該相鄰的奈米碳管束之間通過凡德瓦爾力緊密結合,該奈米碳管束包括多個長度相等且平行排列的奈米碳管。所述奈米碳管可以為單壁奈米碳管、雙壁奈米碳管及多壁奈米碳管中的一種或多種。所述奈米碳管帶狀膜結構的寬度為1毫米~10厘米。所述奈米碳管帶狀膜結構的厚度為0.5奈米~100微米。所述奈米碳管帶狀膜結構之間的間距為5奈米~1毫米。本實施例中,所述透明導電層24包括多個平行且間隔設置的奈米碳管帶狀膜薄膜結構240。所述每一奈米碳管帶狀膜結構240為一層奈米碳管薄膜。優選地,所述透明導電層24中的多個奈米碳管薄膜平行且等間距設置。 The carbon nanotube film structure 240 is a layer of carbon nanotube film, and the carbon nanotube film comprises a plurality of aligned carbon nanotubes, and the plurality of nano tubes The carbon nanotubes are arranged along the length direction of the carbon nanotube film structure 240. In addition, the carbon nanotube film structure 240 may also be a stacked multi-layered carbon nanotube film, each of which comprises a plurality of aligned carbon nanotubes, and adjacent two layers of carbon nanotubes. The carbon nanotubes in the carbon nanotube film are arranged in the same direction or in different directions. The carbon nanotube film further comprises a plurality of end-to-end carbon nanotube bundle segments, each of the carbon nanotube bundle segments having equal lengths and each of the carbon nanotube bundle segments being composed of a plurality of mutually parallel carbon nanotube bundles The two ends of the plurality of carbon nanotube bundle segments are connected to each other by a van der Waals force. The adjacent carbon nanotube bundles are tightly coupled by a van der Waals force, and the bundle of carbon nanotubes includes a plurality of carbon nanotubes of equal length and arranged in parallel. The carbon nanotubes may be one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a multi-walled carbon nanotube. The carbon nanotube film structure has a width of 1 mm to 10 cm. The carbon nanotube ribbon film structure has a thickness of 0.5 nm to 100 μm. The spacing between the carbon nanotube film structures is 5 nm to 1 mm. In this embodiment, the transparent conductive layer 24 includes a plurality of parallel and spaced carbon nanotube film film structures 240. Each of the carbon nanotube strip film structures 240 is a layer of carbon nanotube film. Preferably, the plurality of carbon nanotube films in the transparent conductive layer 24 are disposed in parallel and at equal intervals.
此外,由於所述透明導電層24中的多個奈米碳管帶狀膜平行且間隔設置。優選地,所述透明導電層24中的奈米碳管帶狀膜平行且等間距設置,從而使得所述透明導電層24具有均勻的阻值分布和透光特性,提高了觸摸屏20的分辨率和準確率。 Further, a plurality of carbon nanotube film films in the transparent conductive layer 24 are disposed in parallel and spaced apart. Preferably, the carbon nanotube strip films in the transparent conductive layer 24 are arranged in parallel and at equal intervals, so that the transparent conductive layer 24 has a uniform resistance distribution and light transmission characteristics, and the resolution of the touch screen 20 is improved. And accuracy.
可以理解,為了使得觸摸屏20具有更加均一的透明度, 可以在所述間隔設置的奈米碳管帶狀膜之間設置有光學補償膜。 It can be understood that in order to make the touch screen 20 have more uniform transparency, An optical compensation film may be disposed between the spaced carbon nanotube film layers.
本技術方案實施例透明導電層24的製備方法主要包括以下步驟:步驟一:提供一奈米碳管陣列形成於一基底,優選地,該陣列為超順排奈米碳管陣列。 The preparation method of the transparent conductive layer 24 of the embodiment of the technical solution mainly comprises the following steps: Step 1: providing a carbon nanotube array formed on a substrate, preferably, the array is a super-sequential carbon nanotube array.
本技術方案實施例提供的奈米碳管陣列為單壁奈米碳管陣列、雙壁奈米碳管陣列及多壁奈米碳管陣列中的一種。該奈米碳管陣列的製備方法採用化學氣相沈積法,其具體步驟包括:(a)提供一平整基底,該基底可選用P型或N型矽基底,或選用形成有氧化層的矽基底,本實施例優選為採用4英寸的矽基底;(b)在基底表面均勻形成一催化劑層,該催化劑層材料可選用鐵(Fe)、鈷(Co)、鎳(Ni)或其任意組合的合金之一;(c)將上述形成有催化劑層的基底在700℃~900℃的空氣中退火約30分鐘~90分鐘;(d)將處理過的基底置於反應爐中,在保護氣體環境下加熱到500℃~740℃,然後通入碳源氣體反應約5分鐘~30分鐘,生長得到奈米碳管陣列,其高度為100微米左右。該奈米碳管陣列為多個彼此平行且垂直於基底生長的奈米碳管形成的純奈米碳管陣列。該奈米碳管陣列與上述基底面積基本相同。通過上述控製生長條件,該超順排奈米碳管陣列中基本不含有雜質,如無定型碳或殘留的催化劑金屬顆粒等。 The carbon nanotube array provided by the embodiments of the present technical solution is one of a single-walled carbon nanotube array, a double-walled carbon nanotube array, and a multi-walled carbon nanotube array. The method for preparing the carbon nanotube array adopts a chemical vapor deposition method, and the specific steps thereof include: (a) providing a flat substrate, the substrate may be selected from a P-type or N-type germanium substrate, or a germanium substrate having an oxide layer formed thereon. Preferably, the present embodiment adopts a 4-inch germanium substrate; (b) uniformly forms a catalyst layer on the surface of the substrate, and the catalyst layer material may be selected from iron (Fe), cobalt (Co), nickel (Ni) or any combination thereof. One of the alloys; (c) annealing the substrate on which the catalyst layer is formed in air at 700 ° C to 900 ° C for about 30 minutes to 90 minutes; (d) placing the treated substrate in a reaction furnace in a protective gas atmosphere The mixture is heated to 500 ° C to 740 ° C, and then reacted with a carbon source gas for about 5 minutes to 30 minutes to grow to obtain a carbon nanotube array having a height of about 100 μm. The carbon nanotube array is an array of pure carbon nanotubes formed by a plurality of carbon nanotubes that are parallel to each other and perpendicular to the substrate. The carbon nanotube array is substantially the same area as the above substrate. The super-sequential carbon nanotube array contains substantially no impurities such as amorphous carbon or residual catalyst metal particles, etc., by controlling the growth conditions described above.
本實施例中碳源氣可選用乙炔、乙烯、甲烷等化學性質 較活潑的碳氫化合物,本實施例優選的碳源氣為乙炔;保護氣體為氮氣或惰性氣體,本實施例優選的保護氣體為氬氣。 In this embodiment, the carbon source gas may be selected from the chemical properties of acetylene, ethylene, methane, and the like. For the more active hydrocarbon, the preferred carbon source gas in this embodiment is acetylene; the shielding gas is nitrogen or an inert gas, and the preferred shielding gas in this embodiment is argon.
可以理解,本技術方案實施例提供的奈米碳管陣列不限於上述製備方法,也可為石墨電極恒流電弧放電沈積法、鐳射蒸發沈積法等等。 It can be understood that the carbon nanotube array provided by the embodiments of the present technical solution is not limited to the above preparation method, and may be a graphite electrode constant current arc discharge deposition method, a laser evaporation deposition method or the like.
步驟二:採用一拉伸工具從奈米碳管陣列中拉取奈米碳管獲得一奈米碳管薄膜。 Step 2: Pulling a carbon nanotube from the carbon nanotube array using a stretching tool to obtain a carbon nanotube film.
該奈米碳管薄膜的製備具體包括以下步驟:(a)從上述奈米碳管陣列中選定一定寬度的多個奈米碳管片斷,本實施例優選為採用具有一定寬度的膠帶接觸奈米碳管陣列以選定一定寬度的多個奈米碳管束;(b)以一定速度沿基本垂直於奈米碳管陣列生長方向拉伸多個該奈米碳管束,以形成一連續的奈米碳管薄膜。 The preparation of the carbon nanotube film specifically includes the following steps: (a) selecting a plurality of carbon nanotube segments of a certain width from the carbon nanotube array, and in this embodiment, preferably contacting the nano tape with a tape having a certain width. The carbon tube array selects a plurality of carbon nanotube bundles of a certain width; (b) stretching the plurality of carbon nanotube bundles at a constant speed along a growth direction substantially perpendicular to the carbon nanotube array growth to form a continuous nanocarbon Tube film.
在上述拉伸過程中,該多個奈米碳管束在拉力作用下沿拉伸方向逐漸脫離基底的同時,由於凡德瓦爾力作用,該選定的多個奈米碳管束分別與其他奈米碳管束首尾相連地連續地被拉出,從而形成一奈米碳管薄膜。該奈米碳管薄膜包括多個首尾相連且定向排列的奈米碳管束。該奈米碳管薄膜中的奈米碳管的排列方向基本平行於奈米碳管薄膜的拉伸方向。 In the above stretching process, the plurality of carbon nanotube bundles are gradually separated from the substrate in the stretching direction under the tensile force, and the selected plurality of carbon nanotube bundles are respectively combined with other nanocarbons due to the van der Waals force. The tube bundles are continuously pulled out end to end to form a carbon nanotube film. The carbon nanotube film comprises a plurality of carbon nanotube bundles connected end to end and oriented. The arrangement of the carbon nanotubes in the carbon nanotube film is substantially parallel to the stretching direction of the carbon nanotube film.
請參閱圖4,該奈米碳管薄膜為擇優取向排列的多個奈米碳管束首尾相連形成的具有一定寬度的奈米碳管薄膜。該直接拉伸獲得的擇優取向的奈米碳管薄膜比無序的奈 米碳管薄膜具有更好的均勻性,即具有更均勻的厚度以及具有更均勻的導電性能。同時該直接拉伸獲得奈米碳管薄膜的方法簡單快速,適宜進行工業化應用。 Referring to FIG. 4, the carbon nanotube film is a carbon nanotube film having a certain width formed by connecting a plurality of carbon nanotube bundles arranged in a preferential orientation. The preferentially oriented carbon nanotube film obtained by direct stretching is more than the disordered naphthalene The carbon nanotube film has better uniformity, that is, has a more uniform thickness and has more uniform electrical conductivity. At the same time, the direct stretching method for obtaining the carbon nanotube film is simple and rapid, and is suitable for industrial application.
本實施例中,所述奈米碳管薄膜的寬度與奈米碳管陣列所生長的基底的尺寸以及選取的奈米碳管片段的寬度有關,該奈米碳管薄膜的長度不限,可根據實際需求製得。當該奈米碳管薄膜中的奈米碳管為單壁奈米碳管、雙壁奈米碳管和雙壁奈米碳管中的一種或多種。所述單壁奈米碳管的直徑為0.5奈米~50奈米。所述雙壁奈米碳管的直徑為1.0奈米~50奈米。所述多壁奈米碳管的直徑為1.5奈米~50奈米。 In this embodiment, the width of the carbon nanotube film is related to the size of the substrate on which the carbon nanotube array is grown and the width of the selected carbon nanotube segment, and the length of the carbon nanotube film is not limited. According to actual needs. When the carbon nanotubes in the carbon nanotube film are one or more of a single-walled carbon nanotube, a double-walled carbon nanotube, and a double-walled carbon nanotube. The single-walled carbon nanotube has a diameter of 0.5 nm to 50 nm. The double-walled carbon nanotube has a diameter of 1.0 nm to 50 nm. The multi-walled carbon nanotube has a diameter of 1.5 nm to 50 nm.
步驟三:製備多個上述奈米碳管薄膜,形成一奈米碳管帶狀膜結構,將該奈米碳管帶狀膜結構平行且間隔鋪設在所述基體22的表面,從而形成所述透明導電層24。 Step 3: preparing a plurality of the above-mentioned carbon nanotube film to form a carbon nanotube film structure, and laying the carbon nanotube film structure in parallel and at intervals on the surface of the substrate 22, thereby forming the Transparent conductive layer 24.
所述奈米碳管帶狀膜結構240為一奈米碳管薄膜或重叠設置的多個奈米碳管薄膜。所述重叠設置的多個奈米碳管薄膜中相鄰兩層奈米碳管薄膜中的奈米碳管的排列方式不限,可沿同一方向排列,也可沿不同方向排列。所述奈米碳管帶狀膜結構240之間的設置間距為5奈米~1毫米,具體可根據觸摸屏20的透光性進行選擇。 The carbon nanotube film structure 240 is a carbon nanotube film or a plurality of carbon nanotube films arranged in an overlapping manner. The arrangement of the carbon nanotubes in the adjacent two layers of the carbon nanotube film in the plurality of stacked carbon nanotube films is not limited, and may be arranged in the same direction or in different directions. The arrangement distance between the carbon nanotube film-like film structures 240 is 5 nm to 1 mm, which can be selected according to the light transmittance of the touch screen 20.
由於本實施例超順排奈米碳管陣列中的奈米碳管非常純淨,且由於奈米碳管本身的比表面積非常大,所以該奈米碳管薄膜本身具有較强的粘性。因此,由該奈米碳管薄膜組成的奈米碳管帶狀膜結構作為透明導電層24可直 接粘附在所述基體22的表面。 Since the carbon nanotube in the super-sequential carbon nanotube array of the present embodiment is very pure, and since the specific surface area of the carbon nanotube itself is very large, the carbon nanotube film itself has strong viscosity. Therefore, the carbon nanotube film structure composed of the carbon nanotube film can be used as the transparent conductive layer 24 Attached to the surface of the substrate 22.
另外,可使用有機溶劑處理上述粘附在所述基體22上的奈米碳管帶狀膜結構240。具體地,可通過試管將有機溶劑滴落在奈米碳管帶狀膜結構240表面浸潤整個奈米碳管帶狀膜結構240。該有機溶劑為揮發性有機溶劑,如乙醇、甲醇、丙酮、二氯乙烷或氯仿,本實施例中採用乙醇。該奈米碳管帶狀膜結構240經有機溶劑浸潤處理後,在揮發性有機溶劑的表面張力的作用下,該奈米碳管帶狀膜結構可牢固地貼附在基體表面,且表面體積比减小,粘性降低,具有良好的機械强度及韌性。 Alternatively, the above-described carbon nanotube film structure 240 adhered to the substrate 22 may be treated with an organic solvent. Specifically, the entire carbon nanotube film structure 240 can be infiltrated by the surface of the carbon nanotube film structure 240 by dropping an organic solvent through a test tube. The organic solvent is a volatile organic solvent such as ethanol, methanol, acetone, dichloroethane or chloroform, and ethanol is used in this embodiment. After the carbon nanotube ribbon film structure 240 is infiltrated by an organic solvent, the carbon nanotube film structure can be firmly attached to the surface of the substrate under the action of the surface tension of the volatile organic solvent, and the surface volume is The ratio is reduced, the viscosity is lowered, and the mechanical strength and toughness are good.
另外,所述多個奈米碳管薄膜也可通過以下步驟製備:採用一拉伸工具從奈米碳管陣列中拉取奈米碳管獲得一較大尺寸的奈米碳管薄膜;將該奈米碳管薄膜切割成大小尺寸相等的多個奈米碳管薄膜。 In addition, the plurality of carbon nanotube films can also be prepared by using a stretching tool to pull a carbon nanotube from the carbon nanotube array to obtain a larger size carbon nanotube film; The carbon nanotube film is cut into a plurality of carbon nanotube films of equal size and size.
可以理解,本技術方案實施例提供的所述奈米碳管薄膜的製備不限於上述製備方法,也可通過碾壓法製備一奈米碳管薄膜,該奈米碳管薄膜中的多個奈米碳管沿同一方向排列、沿不同方向排列或各相同性排列。此外,還可採用絮化法製備一奈米碳管薄膜,該奈米碳管薄膜包括多個相互纏繞的奈米碳管。 It can be understood that the preparation of the carbon nanotube film provided by the embodiments of the present technical solution is not limited to the above preparation method, and a carbon nanotube film can also be prepared by a rolling method, and the plurality of naphthalene films in the carbon nanotube film are The carbon nanotubes are arranged in the same direction, arranged in different directions or arranged in the same order. In addition, a carbon nanotube film can be prepared by a flocculation method, and the carbon nanotube film comprises a plurality of intertwined carbon nanotubes.
另外,所述多個電極分別間隔設置在所述透明導電層24相對的兩端,所述每個奈米碳管帶狀膜結構的兩端分別與兩個相對的電極電連接,且所述每個電極與所述透明導電層24中的至少一個奈米碳管帶狀膜結構的一端電連 接。具體地,所述多個電極28一一對應設置於奈米碳管帶狀膜結構的兩端。 In addition, the plurality of electrodes are respectively disposed at opposite ends of the transparent conductive layer 24, and two ends of each of the carbon nanotube strip-shaped film structures are respectively electrically connected to two opposite electrodes, and the Each electrode is electrically connected to one end of at least one of the carbon nanotube strip film structures in the transparent conductive layer 24. Pick up. Specifically, the plurality of electrodes 28 are disposed one-to-one correspondingly at both ends of the carbon nanotube film structure.
可以理解,所述透明導電層24和基體22的形狀可以根據觸摸屏20的觸摸區域的形狀進行選擇。例如觸摸屏20的觸摸區域可為具有一長度的長線形觸摸區域、三角形觸摸區域及矩形觸摸區域等。本實施例中,觸摸屏20的觸摸區域為矩形觸摸區域。 It can be understood that the shapes of the transparent conductive layer 24 and the base 22 can be selected according to the shape of the touch area of the touch screen 20. For example, the touch area of the touch screen 20 may be a long line touch area having a length, a triangular touch area, a rectangular touch area, or the like. In this embodiment, the touch area of the touch screen 20 is a rectangular touch area.
對於矩形觸摸區域,透明導電層24和基體22的形狀也可為矩形。為了在上述的透明導電層24上形成均勻的電阻網絡,需在該透明導電層24的表面分別對稱設置多個電極28。該多個電極電極28可由金屬材料形成。具體地,在本實施例中,基體22為玻璃基板,所述多個電極28為由銀或銅等低電阻的導電金屬鍍層或者金屬箔片組成的條狀電極28。所述多個電極28間隔設置在所述的透明導電層24同一表面的相對的兩個邊上。可以理解,上述的電極28也可以設置在透明導電層24的不同表面上,其關鍵在於上述電極28的設置能使得在透明導電層24上形成等電位面即可。本實施例中,所述電極28設置在透明導電層24的遠離基體的一個表面上。所述電極28可以採用濺射、電鍍、化學鍍等沈積方法直接形成在透明導電層24上。另外,也可用銀膠等導電粘結劑將上述的電極28粘結在透明導電層24的一個表面上。 For the rectangular touch area, the shape of the transparent conductive layer 24 and the base 22 may also be rectangular. In order to form a uniform resistance network on the transparent conductive layer 24 described above, a plurality of electrodes 28 are symmetrically disposed on the surface of the transparent conductive layer 24, respectively. The plurality of electrode electrodes 28 may be formed of a metal material. Specifically, in the present embodiment, the base 22 is a glass substrate, and the plurality of electrodes 28 are strip electrodes 28 composed of a low-resistance conductive metal plating such as silver or copper or a metal foil. The plurality of electrodes 28 are spaced apart on opposite sides of the same surface of the transparent conductive layer 24. It can be understood that the above-mentioned electrodes 28 can also be disposed on different surfaces of the transparent conductive layer 24. The key point is that the electrodes 28 are disposed such that an equipotential surface is formed on the transparent conductive layer 24. In this embodiment, the electrode 28 is disposed on a surface of the transparent conductive layer 24 away from the substrate. The electrode 28 may be directly formed on the transparent conductive layer 24 by a deposition method such as sputtering, electroplating, or electroless plating. Alternatively, the above electrode 28 may be bonded to one surface of the transparent conductive layer 24 by a conductive adhesive such as silver paste.
可以理解,所述電極28亦可設置於透明導電層24與基體22之間,且與透明導電層24電連接,並不限於上述的設置方式和粘結方式。只要能使上述的電極28與透明導電 層24上之間形成電連接的方式都應在本發明的保護範圍內。 It can be understood that the electrode 28 can also be disposed between the transparent conductive layer 24 and the substrate 22 and electrically connected to the transparent conductive layer 24, and is not limited to the above arrangement and bonding manner. As long as the above electrode 28 can be transparently conductive The manner in which electrical connections are made between layers 24 is within the scope of the present invention.
進一步地,為了延長透明導電層24的使用壽命和限製耦合在接觸點與透明導電層24之間的電容,可以在透明導電層24和電極之上設置一透明的防護層26,防護層26可由氮化矽、氧化矽、苯并環丁烯(BCB)、聚酯膜或丙烯酸樹脂等形成。該防護層26具有一定的硬度,對透明導電層24起保護作用。可以理解,還可通過特殊的工藝處理,從而使得防護層26具有以下功能,例如减小炫光、降低反射等。 Further, in order to extend the service life of the transparent conductive layer 24 and limit the capacitance coupled between the contact point and the transparent conductive layer 24, a transparent protective layer 26 may be disposed on the transparent conductive layer 24 and the electrode, and the protective layer 26 may be It is formed of tantalum nitride, cerium oxide, benzocyclobutene (BCB), a polyester film or an acrylic resin. The protective layer 26 has a certain hardness and protects the transparent conductive layer 24. It will be appreciated that processing may also be performed by a special process such that the protective layer 26 has the following functions, such as reducing glare, reducing reflection, and the like.
在本實施例中,在形成有電極28的透明導電層24上設置一二氧化矽層用作防護層26,該防護層26的硬度達到7H(H為洛氏硬度試驗中,卸除主試驗力後,在初試驗力下壓痕殘留的深度)。可以理解,防護層26的硬度和厚度可以根據需要進行選擇。所述防護層26可以通過粘結劑直接粘結在透明導電層24上。 In the present embodiment, a ruthenium dioxide layer is disposed on the transparent conductive layer 24 on which the electrode 28 is formed as the protective layer 26, and the hardness of the protective layer 26 reaches 7H (H is the Rockwell hardness test, and the main test is performed. After the force, the depth of the indentation remains under the initial test force). It will be appreciated that the hardness and thickness of the protective layer 26 can be selected as desired. The protective layer 26 can be directly bonded to the transparent conductive layer 24 by an adhesive.
此外,為了减小由顯示設備產生的電磁干擾,避免從觸摸屏20發出的信號產生錯誤,還可在基體22的第二表面222上設置一屏蔽層25。該屏蔽層25可由銦錫氧化物(ITO)薄膜、銻錫氧化物(ATO)薄膜或奈米碳管薄膜等透明導電材料形成。該奈米碳管薄膜可以為定向排列的或其它結構的奈米碳管薄膜。本實施例中,該奈米碳管薄膜包括多個奈米碳管,所述多個奈米碳管在上述的奈米碳管薄膜中定向排列,其具體結構可與透明導電層24相同。該奈米碳管薄膜作為電接地點,起到屏蔽的作用 ,從而使得觸摸屏20能在無干擾的環境中工作。 Furthermore, in order to reduce the electromagnetic interference generated by the display device and to avoid errors in the signal emitted from the touch screen 20, a shielding layer 25 may also be provided on the second surface 222 of the substrate 22. The shield layer 25 may be formed of a transparent conductive material such as an indium tin oxide (ITO) film, an antimony tin oxide (ATO) film, or a carbon nanotube film. The carbon nanotube film can be a aligned or otherwise structured carbon nanotube film. In this embodiment, the carbon nanotube film comprises a plurality of carbon nanotubes, and the plurality of carbon nanotubes are aligned in the above-mentioned carbon nanotube film, and the specific structure thereof may be the same as that of the transparent conductive layer 24. The carbon nanotube film acts as an electrical grounding point and acts as a shield Thus, the touch screen 20 can operate in a non-interfering environment.
請參閱圖5,並結合圖2,本技術方案實施例提供一顯示裝置100,該顯示裝置100包括一觸摸屏20,一顯示設備30。該顯示設備30正對且靠近觸摸屏20設置。進一步地,上述的顯示設備30正對且靠近觸摸屏20的基體22第二表面222設置。上述的顯示設備30與觸摸屏20可間隔一預定距離設置或集成設置。 Referring to FIG. 5 , and in conjunction with FIG. 2 , the embodiment of the present invention provides a display device 100 . The display device 100 includes a touch screen 20 and a display device 30 . The display device 30 is disposed directly adjacent to the touch screen 20. Further, the display device 30 described above is disposed adjacent to and adjacent to the second surface 222 of the base 22 of the touch screen 20. The display device 30 described above and the touch screen 20 may be spaced apart by a predetermined distance or integrated.
顯示設備30可以為液晶顯示器、場發射顯示器、電漿顯示器、電致發光顯示器、真空螢光顯示器及陰極射線管等顯示設備中的一種。 The display device 30 may be one of display devices such as a liquid crystal display, a field emission display, a plasma display, an electroluminescence display, a vacuum fluorescent display, and a cathode ray tube.
請參閱圖2及圖6,進一步地,當顯示設備30與觸摸屏20間隔一定距離設置時,可在觸摸屏20的屏蔽層25遠離基體22的一個表面上設置一鈍化層104,該鈍化層104可由氮化矽、氧化矽、苯并環丁烯、聚酯膜、丙烯酸樹脂等材料形成。該鈍化層104與顯示設備30的正面間隔一間隙106設置。具體地,在上述的鈍化層104與顯示設備30之間設置兩個支撑體108。該鈍化層104作為介電層使用,所述鈍化層104與間隙106可保護顯示設備30不致於由於外力過大而損壞。 Referring to FIG. 2 and FIG. 6 , further, when the display device 30 is disposed at a distance from the touch screen 20 , a passivation layer 104 may be disposed on a surface of the shielding layer 25 of the touch screen 20 away from the substrate 22 , and the passivation layer 104 may be It is formed of a material such as tantalum nitride, cerium oxide, benzocyclobutene, a polyester film, or an acrylic resin. The passivation layer 104 is spaced apart from the front side of the display device 30 by a gap 106. Specifically, two support bodies 108 are disposed between the passivation layer 104 and the display device 30 described above. The passivation layer 104 is used as a dielectric layer that protects the display device 30 from damage due to excessive external forces.
當顯示設備30與觸摸屏20集成設置時,觸摸屏20和顯示設備30之間接觸設置。即將支撑體108除去後,上述鈍化層104無間隙地設置在顯示設備30的正面。 When the display device 30 is integrated with the touch screen 20, the touch screen 20 and the display device 30 are in contact with each other. Immediately after the support 108 is removed, the passivation layer 104 is disposed on the front surface of the display device 30 without a gap.
另外,上述的顯示裝置100進一步包括一觸摸屏控製器40、一顯示設備控製器60及一中央處理器50。其中,觸摸 屏控製器40、中央處理器50及顯示設備控製器60三者通過電路相互連接,觸摸屏控製器40連接觸摸屏20的電極28,顯示設備控製器60連接顯示設備30。 In addition, the display device 100 further includes a touch screen controller 40, a display device controller 60, and a central processing unit 50. Among them, touch The screen controller 40, the central processing unit 50, and the display device controller 60 are connected to each other by a circuit, the touch screen controller 40 is connected to the electrode 28 of the touch screen 20, and the display device controller 60 is connected to the display device 30.
本實施例觸摸屏20及顯示裝置100在應用時的原理如下:觸摸屏20在應用時可直接設置在顯示設備30的顯示面上。觸摸屏控製器40根據手指等觸摸物70觸摸的圖標或菜單位置來定位選擇信息輸入,並將該信息傳遞給中央處理器50。中央處理器50通過顯示器控製器60控製顯示設備30顯示。 The principle of the touch screen 20 and the display device 100 in this embodiment is as follows: The touch screen 20 can be directly disposed on the display surface of the display device 30 when applied. The touch screen controller 40 positions the selection information input based on an icon or menu position touched by the touch object 70 such as a finger, and transmits the information to the central processing unit 50. The central processor 50 controls the display of the display device 30 through the display controller 60.
具體地,在使用時,透明導電層24上施加一預定電壓。電壓通過電極28施加到透明導電層24上,從而在該透明導電層24上形成等電位面。使用者一邊視覺確認在觸摸屏20後面設置的顯示設備30的顯示,一邊通過手指或筆等觸摸物70按壓或接近觸摸屏20的防護層26進行操作時,觸摸物70與透明導電層24之間形成一耦合電容。對於高頻電流來說,電容為直接導體,於為手指從接觸點吸走了一部分電流。這個電流分別從觸摸屏20被觸摸的奈米碳管帶狀膜結構相連接的兩個電極中流出,並且流經這兩個電極的電流與手指到兩個電極的距離成正比,觸摸屏控製器40通過對這兩個電流比例的精確計算,得出觸摸點在被觸摸的奈米碳管帶狀膜結構上的位置,並和每個奈米碳管帶狀膜結構設置在觸摸屏20上的位置數據結合,從而得出觸摸點在觸摸屏20上的觸摸位置。之後,觸摸屏控製器40將數字化的觸摸位置數據傳送給中央處理器50。然後,中央處理器50接受上述的觸摸位置數 據並執行。最後,中央處理器50將該觸摸位置數據傳輸給顯示器控製器60,從而在顯示設備30上顯示接觸物70發出的觸摸信息。 Specifically, a predetermined voltage is applied to the transparent conductive layer 24 when in use. A voltage is applied to the transparent conductive layer 24 through the electrode 28 to form an equipotential surface on the transparent conductive layer 24. The user visually confirms the display of the display device 30 disposed behind the touch screen 20, and when the user touches or approaches the protective layer 26 of the touch screen 20 by a touch object 70 such as a finger or a pen, the touch object 70 and the transparent conductive layer 24 are formed. A coupling capacitor. For high-frequency currents, the capacitor is a direct conductor that draws a portion of the current from the contact point for the finger. This current flows from the two electrodes connected to the touched carbon nanotube ribbon film structure of the touch screen 20, respectively, and the current flowing through the two electrodes is proportional to the distance of the finger from the two electrodes, and the touch screen controller 40 By accurately calculating the ratio of the two currents, the position of the touched point on the touched carbon nanotube film structure is obtained, and the position of each carbon nanotube film structure on the touch screen 20 is set. The data is combined to derive the touch location of the touch point on the touch screen 20. Thereafter, the touch screen controller 40 transmits the digitized touch location data to the central processor 50. Then, the central processing unit 50 accepts the above-mentioned number of touch positions According to and executed. Finally, the central processor 50 transmits the touch location data to the display controller 60 to display the touch information emitted by the contact 70 on the display device 30.
本技術方案實施例提供的顯示裝置100具有以下優點:其一,由於透明導電層中的多個奈米碳管帶狀膜結構平行且間隔設置,因此,所述透明導電層具有較好的力學性能,從而使得上述的透明導電層具有較好的機械强度和韌性,故,採用上述的奈米碳管帶狀膜結構作透明導電層,可以相應的提高觸摸屏的耐用性,進而提高了使用該觸摸屏的顯示裝置的耐用性;其二,上述透明導電層中的多個奈米碳管帶狀膜結構平行且間隔設置,從而使得透明導電層具有均勻的阻值分布和透光性,且所述每個電極與其所在透明導電層中的至少一個奈米碳管帶狀膜結構的一端電連接,故可以通過探測觸摸點處電極之間的電流變化來更精確地確定觸摸點的位置,從而有利於提高觸摸屏及使用該觸摸屏的顯示裝置的分辨率和精確度。 The display device 100 provided by the embodiment of the present technical solution has the following advantages: First, since the plurality of carbon nanotube film films in the transparent conductive layer are parallel and spaced apart, the transparent conductive layer has better mechanics. The performance, so that the transparent conductive layer has good mechanical strength and toughness, so the use of the above-mentioned carbon nanotube film structure as a transparent conductive layer can correspondingly improve the durability of the touch screen, thereby improving the use of the The durability of the display device of the touch screen; secondly, the plurality of carbon nanotube film films in the transparent conductive layer are parallel and spaced apart, so that the transparent conductive layer has a uniform resistance distribution and light transmittance, and Each of the electrodes is electrically connected to one end of at least one of the carbon nanotube strip film structures in the transparent conductive layer, so that the position of the touched point can be more accurately determined by detecting a change in current between the electrodes at the touch point, thereby It is advantageous to improve the resolution and accuracy of the touch screen and the display device using the touch screen.
綜上所述,本發明確已符合發明專利之要件,遂依法提出專利申請。惟,以上所述者僅為本發明之較佳實施例,自不能以此限製本案之申請專利範圍。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飾或變化,皆應涵蓋於以下申請專利範圍內。 In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.
100‧‧‧顯示裝置 100‧‧‧ display device
104‧‧‧鈍化層 104‧‧‧ Passivation layer
106‧‧‧間隙 106‧‧‧ gap
108‧‧‧支撑體 108‧‧‧Support
20‧‧‧觸摸屏 20‧‧‧ touch screen
22‧‧‧基體 22‧‧‧ base
221‧‧‧第一表面 221‧‧‧ first surface
222‧‧‧第二表面 222‧‧‧ second surface
24‧‧‧透明導電層 24‧‧‧Transparent conductive layer
240‧‧‧奈米碳管長線 240‧‧‧Non carbon tube long line
25‧‧‧屏蔽層 25‧‧‧Shield
26‧‧‧防護層 26‧‧‧Protective layer
28‧‧‧電極 28‧‧‧Electrode
30‧‧‧顯示設備 30‧‧‧Display equipment
40‧‧‧觸摸屏控製器 40‧‧‧ touch screen controller
50‧‧‧中央處理器 50‧‧‧ central processor
60‧‧‧顯示設備控製器 60‧‧‧Display device controller
70‧‧‧觸摸物 70‧‧‧ touching objects
圖1為本技術方案實施例的觸摸屏的結構示意圖。 FIG. 1 is a schematic structural diagram of a touch screen according to an embodiment of the present technical solution.
圖2為沿圖1所示的線II-II的剖視圖。 Fig. 2 is a cross-sectional view taken along line II-II shown in Fig. 1.
圖3為本技術方案實施例的透明導電層的結構示意圖。 FIG. 3 is a schematic structural diagram of a transparent conductive layer according to an embodiment of the present technical solution.
圖4為本技術方案實施例的透明導電層的奈米碳管薄膜的掃描電鏡圖。 4 is a scanning electron micrograph of a carbon nanotube film of a transparent conductive layer according to an embodiment of the present technology.
圖5為本技術方案實施例的顯示裝置的結構示意圖。 FIG. 5 is a schematic structural diagram of a display device according to an embodiment of the present technical solution.
圖6為本技術方案實施例的顯示裝置的工作原理示意圖。 FIG. 6 is a schematic diagram of the working principle of the display device according to the embodiment of the present technical solution.
20‧‧‧觸摸屏 20‧‧‧ touch screen
22‧‧‧基體 22‧‧‧ base
221‧‧‧第一表面 221‧‧‧ first surface
222‧‧‧第二表面 222‧‧‧ second surface
24‧‧‧透明導電層 24‧‧‧Transparent conductive layer
25‧‧‧屏蔽層 25‧‧‧Shield
26‧‧‧防護層 26‧‧‧Protective layer
Claims (26)
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TWI408575B true TWI408575B (en) | 2013-09-11 |
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TW200407259A (en) * | 2002-11-05 | 2004-05-16 | Hon Hai Prec Ind Co Ltd | A carbon nanotube yarn and the method for making it |
TWI233570B (en) * | 2001-12-28 | 2005-06-01 | Lg Philips Lcd Co Ltd | Touch panel display apparatus and method of fabricating the same |
TW200705247A (en) * | 2005-05-26 | 2007-02-01 | Gunze Kk | Transparent planar body and transparent touch switch |
TW200713337A (en) * | 2005-07-07 | 2007-04-01 | 3M Innovative Properties Co | Touch panel sensor |
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TWI233570B (en) * | 2001-12-28 | 2005-06-01 | Lg Philips Lcd Co Ltd | Touch panel display apparatus and method of fabricating the same |
TW200407259A (en) * | 2002-11-05 | 2004-05-16 | Hon Hai Prec Ind Co Ltd | A carbon nanotube yarn and the method for making it |
TW200705247A (en) * | 2005-05-26 | 2007-02-01 | Gunze Kk | Transparent planar body and transparent touch switch |
TW200713337A (en) * | 2005-07-07 | 2007-04-01 | 3M Innovative Properties Co | Touch panel sensor |
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