異型切割背光模組設計改善之研究

在液晶顯示器(Liquid Crystal Display, LCD)技術的高速發展下，日常生活中液晶顯示器已經無所不在，隨著近年手機大廠相繼推出全面屏產品，此時全面屏已然成為行動裝置的趨勢。全面屏手機的螢幕為了達到窄邊框的設計，面板邊緣會非常貼近手機機身，所以為了避免跌落時造成面板碎裂以及預留光學模組的元件空間，將面板模組加工成非直角及元件預留區缺口的異形切割變得十分必要。目前市場上有運到異形切割的手持裝置大多是使用AMOLED面板(Active-matrix organic light-emitting diode，主動矩陣有機發光二極體)，本研究的目的是要使液晶顯示面板模組(TFT-LCD module)異形切割的效果等同甚至超越AMOLED面板並且具有成本優勢及量產性。液晶顯示面板模組中的背光模組(Backlight)雖然可以達到異形切割的外型，但是卻有光學視效不均勻及可靠性測試異常的問題需要克服，本研究利用導光板(Light guide plate)網點結構的反(折)射效果來解決亮暗不均勻的視效問題；至於可靠性測試異常的部分，則藉由材料設計及製程優化來克服。依照目前研究結果顯示，異形切割背光模組在符合模具成型條件下並且適當運用導光板調整光學視效，異形切割背光可以做到跟一般習知背光模組相同的光學視效和光學規格，並且符合終端客戶的可靠性驗證。本研究實驗的結果對於液晶顯示面板(TFT-LCD)應用在異型切割的小尺寸液晶模組有相當的助益，此研究亦可讓液晶顯示面板模組(TFT-LCD module)在手機下一世代新產品更具競爭力。

關鍵字

背光模組

並列摘要

In the rapid development of Liquid Crystal Display (LCD) technology era, LCD have been all over the place in daily life. This year, major mobile phone manufacturers have introduced a full screen products in succession, then the full screen has become a trend of mobile devices. Full-screen mobile phone screen in order to achieve a narrow border design, the edge of the screen will be very close to the phone body. Therefore, in order to reduce the possibility of broken screen and reserve the component space of the module, it is necessary to cut the screen into non-right-angle and shaped cut of the reserved area. Currently on the market there are mostly hand-held devices shipped to shaped cutting using AMOLED panel. This research can equalize and even outperform the AMOLED panel with the advantages of cost-cutting and mass-production of the shaped cutting of the TFT-LCD module. Although the backlight module in the LCD panel module can achieve the appearance of profiled cutting, the problem of poor optical visual and reliability testing needs to be overcome. We redesigned a Light guide plate network structure different from the conventional backlight module to solve the problem of light / dark block (line) using the anti-reflection effect of the network structure. The failed part of the reliability test we use material design and process optimization to overcome. According to the current research results, the notch-shaped backlight module can achieve the same optical visual and optical specifications as the conventional backlight module if it meets the mold forming conditions and appropriate revise the light guide plate pattern to adjust optical visual effects, and pass the end-customer reliability verification. The results of this research experiment for the special-shaped cutting applications in small-size backlight module has a considerable benefit. This research also makes TFT-LCD modules more competitive with the next generation of mobile handsets.