TW201312245A - 導光液態膠及其應用之觸控顯示裝置 - Google Patents

導光液態膠及其應用之觸控顯示裝置 Download PDF

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TW201312245A
TW201312245A TW101121070A TW101121070A TW201312245A TW 201312245 A TW201312245 A TW 201312245A TW 101121070 A TW101121070 A TW 101121070A TW 101121070 A TW101121070 A TW 101121070A TW 201312245 A TW201312245 A TW 201312245A
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light guiding
liquid glue
light
touch
panel
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TWI612368B (zh
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Yuh-Wen Lee
Qiong Yuan
xian-bin Xu
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Tpk Touch Solutions Xiamen Inc
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Abstract

本發明係有關於導光液態膠及其應用之觸控顯示裝置，導光液態膠包含複數個導光粒子分散於液態膠中，導光粒子佔導光液態膠的體積百分比為10%至50%，導光粒子具有光散射性，可以將線光轉變為面光，使得導光液態膠具有導光性。觸控顯示裝置包含顯示面板和觸控面板，導光液態膠設置於顯示面板與觸控面板之間，可以將顯示面板發出的光均勻地傳導出去。

Description

導光液態膠及其應用之觸控顯示裝置
本發明係有關於一種液態膠，特別有關於一種具有導光性的液態膠及其應用之觸控顯示裝置。
近年來，觸控顯示器已經被大量應用在各種電子產品中，例如手機、個人數位助理(PDA)或掌上型個人電腦等。 觸控顯示器通常包含觸控面板及顯示面板，觸控面板貼合至顯示面板上，使用者可觸碰觸控顯示器上顯示的圖像，藉此輸入訊息或操控電子產品。
傳統上，在顯示面板的表面上通常需貼合導光膜，然後再藉由液態膠將顯示面板與觸控面板貼合。然而，在顯示面板上貼合導光膜的製程需要使用滾輪滾壓或使用真空貼合，因此容易造成顯示面板損傷不良或殘留應力。此殘留應力在後續使用液態膠貼合顯示面板和觸控面板時容易導致貼合不良，同時，液態膠在導光膜上的流動速度非常慢，使得液態膠在流動時容易產生氣泡，更加造成顯示面板和觸控面板的貼合不良。
另外，貼合導光膜之後還需要進行脫泡製程，這使得傳統觸控顯示器的貼合製程繁複且耗時，影響產品的良率與產能。
有鑑於此，本發明設計了具有導光性的液態膠，並利用具有導光性的液態膠來做為顯示面板及觸控面板之間的貼合媒介，以省去導光膜的設計，進而得以改善因導光膜 貼合製程所造成的顯示面板損傷、殘留應力及後續貼合製程不良的問題。
本發明之實施例提供一種導光液態膠，包括：液態膠以及複數個導光粒子分散於液態膠中，其中導光粒子佔導光液態膠的體積百分比為10%至50%。這些導光粒子具有光散射性，可以將線光轉變為面光，使得導光液態膠具有導光性。
另外，本發明之實施例還提供一種觸控顯示裝置，包括：顯示面板、觸控面板，以及上述實施例的導光液態膠設置於顯示面板與觸控面板之間，導光液態膠可以將顯示面板發出的光均勻地傳導出去。
為了讓本發明之上述目的、特徵、及優點能更明顯易懂，以下配合所附圖式作詳細說明。
本發明實施例之導光液態膠同時具有導光性、黏著性與流動性，適用於觸控顯示裝置的液態膠貼合製程。當本發明實施例之導光液態膠用於貼合觸控顯示裝置的顯示面板與觸控面板時，在顯示面板的表面上不需再貼合導光膜，因此不會有顯示面板損傷不良或應力殘留等問題發生。
同時，由於本發明實施例之導光液態膠是直接塗佈在顯示面板上，導光液態膠在顯示面板上的流動速度會大於在傳統導光膜上的流動速度，因此可避免氣泡產生，提升顯示面板與觸控面板的貼合品質。
此外，相較於傳統觸控顯示器的貼合製程，使用本發明實施例之導光液態膠進行顯示面板與觸控面板的貼合製 程時，可以省略導光膜的貼合與脫泡步驟，使得觸控顯示裝置的貼合製程簡化並縮短製程時間，有效提高觸控顯示裝置的良率與產能。
本發明實施例之導光液態膠包括液態膠，以及複數個導光粒子分散於液態膠中，其中導光粒子佔導光液態膠的體積百分比約為10%至50%。實際在比例的設計上，以同時能符合導光性及透明可視度的需求為主。
液態膠可以是液態光學膠，其材料包含壓克力系高分子、丙烯酸樹脂(acrylic resin)或環氧樹脂等高分子材料。壓克力系高分子例如為由丙烯酸甲酯、丙烯酸乙酯、丙烯酸丁酯或其他丙烯酸酯(acrylate)單體共聚而成的共聚物。環氧樹脂可以是自由基型環氧樹脂、雙組分環氧樹脂或雙陽離子環氧樹脂。
導光粒子為具有光散射性的粒子，其粒徑介於30nm至5μm之間，導光粒子可由無機透明材料以及/或有機透明材料製成，例如為二氧化矽(SiO2)、氧化鋁(Al2O3)、二氧化鈦(TiO2)、玻璃粉及透明樹脂顆粒等材料。
將導光粒子利用直接混合、攪拌、研磨/珠磨、三滾軸碾壓及超聲波震動分散等方式均勻分散在液態膠中，形成本發明實施例之導光液態膠，導光液態膠中的導光粒子可以將線光轉變為面光，達到導光效果。
此外，本說明書中所稱的方位“上方”及“下方”，僅是用來表示相對的位置關係，對於本說明書的圖式而言，觸控顯示裝置的上方較接近使用者，而下方則較遠離使用者。
參閱第1圖，其顯示依據本發明之一實施例，觸控顯示裝置200的剖面示意圖。觸控顯示裝置200包含顯示面板100以及觸控面板116，顯示面板100例如為液晶顯示面板或其他顯示元件，觸控面板116例如為電容式觸控面板或其他類型的觸控面板。
依據本發明之實施例，導光液態膠110全面性地直接塗佈在顯示面板100用來射出光線的一表面，如第1圖所示的上方表面，進而觸控面板116即可透過導光液態膠110貼合於顯示面板100上方。導光液態膠110由複數個導光粒子114均勻分散在液態膠112中組成，導光粒子114具有光散射性，可以將線光轉變成面光，因此導光液態膠110不僅可以將顯示面板100與觸控面板116貼合，還可以進一步讓顯示面板100發出的光均勻地傳導出來。
因此，依據本發明實施例之觸控顯示裝置200，顯示面板100的表面上不需貼合導光膜，導光液態膠110直接做為顯示面板100與觸控面板116之間的貼合媒介，以同時達到導光與貼合的作用。
接著，在使用導光液態膠110來貼合觸控面板116及顯示面板100之後，需對導光液態膠110進行固化。導光液態膠110可依據實際所採用之液態膠112的種類的不同，而分別藉由紫外(UV)光固化、熱固化、濕氣固化、厭氧固化、雙組分固化等方式固化。
另外，本實施例的觸控顯示裝置200還包含保護蓋(Cover Lens)120貼合於觸控面板116上方之表面，用來對觸控顯示裝置200提供支撐及保護作用。保護蓋120可利 用黏著層118來與觸控面板116貼合。其中，保護蓋120例如為透明玻璃基板，並且可以進一步是經過強化、抗菌、抗眩等加工處理的透明玻璃基板；而黏著層118則可以是液態膠或其他黏膠。
附帶說明的是，上述有關於製程的描述，僅是方便用來說明本實施例之觸控顯示裝置200的架構，並非用來限制本發明。本實施例更可例如是先將保護蓋120貼合於觸控面板116上方，之後再以導光液態膠110來將上方貼有保護蓋120的觸控面板116貼合於顯示面板100上方。
請參閱第2圖，其顯示依據本發明之另一實施例，觸控顯示裝置200’的剖面示意圖。本實施例的觸控顯示裝置200’的架構與設計大致與第1圖之實施例相同，包含顯示面板100及觸控面板122，並且顯示面板100及觸控面板122之間是直接透過導光液態膠110來進行貼合。其差異點在於，本實施例的觸控面板122除了是用來做為觸碰感測之外，更是直接做為保護層，對觸控顯示裝置200’提供支撐及保護作用。換句話說，觸控面板122本身的基板是經過強化、抗菌、抗眩等加工處理，並且進一步形成有感測電極陣列(圖未示)，以用來感測觸碰點。
相較於第1圖的觸控顯示裝置200，第2圖的觸控顯示裝置200’可以減少一片保護蓋120的設置，使得觸控顯示裝置200’整體的厚度減薄，並且可減少使用黏著層118將保護蓋120與觸控面板116貼合的製程步驟。
綜上所述，本發明實施例之導光液態膠可以取代傳統觸控顯示器中的導光膜及用來貼合導光膜與顯示面板的液 態膠。因此在本發明實施例之觸控顯示裝置中，顯示面板的表面不需再貼合導光膜，可以直接透過導光液態膠來與觸控面板貼合。
因此，本發明實施例之觸控顯示裝置可以避免因為貼合導光膜而造成的顯示面板損傷不良或應力殘留等問題發生。同時，導光液態膠直接塗佈於顯示面板上的流動性佳，可以避免氣泡產生，提升顯示面板與觸控面板的貼合品質。
另外，相較於傳統觸控顯示器的貼合製程，本發明實施例之觸控顯示裝置的貼合製程可以省略導光膜的貼合與脫泡步驟，使得觸控顯示裝置的製程簡化且時間縮短，有效地提高觸控顯示裝置的生產良率與產量。
此外，依據本發明實施例之觸控顯示裝置，在顯示面板上不需貼合導光膜，因此不會有應力殘留等問題發生，這使得在觸控面板外側貼合保護蓋的貼合品質提升。
雖然本發明已揭露較佳實施例如上，然其並非用以限定本發明，任何熟悉此項技藝者，在不脫離本發明之精神和範圍內，當可做些許更動與潤飾，因此本發明之保護範圍當視後附之申請專利範圍所界定為準。
100‧‧‧顯示面板
110‧‧‧導光液態膠
112‧‧‧液態膠
114‧‧‧導光粒子
116、122‧‧‧觸控面板
118‧‧‧黏著層
120‧‧‧保護蓋
200、200’‧‧‧觸控顯示裝置
第1圖顯示依據本發明之一實施例所繪示的觸控顯示裝置的剖面示意圖；第2圖顯示依據本發明之另一實施例所繪示的觸控顯示裝置的剖面示意圖。
100‧‧‧顯示面板
110‧‧‧導光液態膠
112‧‧‧液態膠
114‧‧‧導光粒子
116‧‧‧觸控面板
118‧‧‧黏著層
120‧‧‧保護蓋
200‧‧‧觸控顯示裝置

Claims (13)

  1. 一種導光液態膠，包括：一液態膠；以及複數個導光粒子，分散於該液態膠中。
  2. 如申請專利範圍第1項所述之導光液態膠，其中該些導光粒子佔該導光液態膠的體積百分比為10%至50%。
  3. 如申請專利範圍第1項所述之導光液態膠，其中該些導光粒子的粒徑介於30nm至5μm之間。
  4. 如申請專利範圍第1項所述之導光液態膠，其中該些導光粒子的材料包括有機透明材料或無機透明材料。
  5. 如申請專利範圍第1項所述之導光液態膠，其中該些導光粒子的材料係選自於由二氧化矽、氧化鋁、二氧化鈦、玻璃粉及透明樹脂顆粒所組成之群組。
  6. 如申請專利範圍第1項所述之導光液態膠，其中該液態膠包括一液態光學膠。
  7. 如申請專利範圍第1項所述之導光液態膠，其中該液態膠的材料包括壓克力系高分子、丙烯酸樹脂或環氧樹脂。
  8. 如申請專利範圍第7項所述之導光液態膠，其中該壓克力系高分子包括丙烯酸甲酯、丙烯酸乙酯及丙烯酸丁酯的共聚物，該環氧樹脂包括自由基型環氧樹脂、雙組分環氧樹脂或雙陽離子環氧樹脂。
  9. 一種觸控顯示裝置，包括：一顯示面板；一觸控面板；以及一如申請專利範圍第1項所述之導光液態膠，設置於 該顯示面板與該觸控面板之間。
  10. 如申請專利範圍第9項所述之觸控顯示裝置，其中該導光液態膠直接設置於該顯示面板上。
  11. 如申請專利範圍第9項所述之觸控顯示裝置，其中該導光液態膠中的該些導光粒子將該顯示面板發出的光均勻地傳導出來。
  12. 如申請專利範圍第9項所述之觸控顯示裝置，進一步包含：一保護蓋，貼合於該觸控面板的一上表面。
  13. 如申請專利範圍第9項所述之觸控顯示裝置，其中該觸控面板進一步係一支撐及保護用之面板。
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