電容式觸控面板因需把感應觸控位置及動作的感應電路做成圖樣化,而有無感應電路的區域因膜層疊構的不同,造成薄膜干涉的結果不同,會讓我們在觸控式顯示器上看到感應電路圖樣,影響了顯示品質。本篇論文利用薄膜光學及色彩學等相關理論,並使用薄膜光學軟體,研究當ITO作為感應電路之電極時觸控面板的光學及色度表現,接著利用加入折射率匹配膜層的方法,對不同面板疊構下的折射率匹配膜層做設計,同時也考慮實際製程上的效益與產品良率,來降低觸控產品ITO感應電路可視性與面板的色偏。我們也觀察了實際的觸控產品,分析其在不同面板疊構以及不同條件的光源入射下,面板呈現的光學表現,並對於各種降低ITO感應電路可視性的方法,在製程考量以及光學表現等做相對的優缺比較。
The patterned sensing circuit used to detect touch action and position on capacitive touch panels, the different stackup of films result in different optical performance, so we can observe the patterned sensing circuit on touched display and reduce the visual quality. In this study, we use the theory of optical thin films, color science and thin film simulation software to research the optical and color performance on touch panels. We adjust the parameters of ITO, and design index matching films for different stackup to decrease the visibility of ITO pattern and color shift on touch panels. We also observe the real products, and analyze the optical and color performance under different stackup of panels and incident light source. Finally, we summarize the pros and cons of these methods for optimize touch panels with process and optical performance.