摘要
車用抬頭顯示器(Head-up Display)可將速度、導航、控制警示系統等重要的行車資訊投射到駕駛的視線上，讓駕駛員在行車時可保持抬頭之駕駛視線狀態，減輕眼睛調視的負擔，降低駕駛遇到狀況時的反應時間，大幅提高行車之安全性。本論文所提出之投影式抬頭顯示器架構，目的為縮減現有抬頭顯示器的體積，使其能被裝置於儀錶台上，且具顯示導航資訊的能力；以符合汽車售後零件市場(after-market)之接受度，且以平易的價格符合消費性電子市場的需求，進而應用於更多車款。 本論文提出之架構為使用穿透式TFT-LCD面板作為影像源，LED為照明光源，首先藉由設計及優化導光管的外型及LED的排列方式，均勻混合光線分布，提升面板上的均勻度及光源的使用效率，接著再利用一片非球面透鏡，放大及投影顯示影像。並可透過折疊光路縮減抬頭顯示組件之體積。依照上述的結構，目前已完成兩個架構的原型機，驗證其光路可行性，且具有顯示導航資訊的成像品質，多彩顯示及圖片等級的解析度。本論文提出之車用抬頭顯示器可作為可攜式導航系統的顯示介面，並可望在近期量產上市。
並列摘要
Head-up display (HUD) is the most suitable visual interface of navigation system in terms of safety consideration. Drivers can receive information without moving their line of sight from the road and it helps to reduce driver visual strain and improve driving reaction time. This thesis proposes a new architecture of HUD unit, which is compact enough as a portable device which can be mounted on the dashboard of most car models for after-market service. This HUD unit also can provide multicolor and picture grade resolution so as to integrate more functions in the display unit. A transmissive TFT LCD is used as the image source, and white LEDs are used as the illumination light source. A tapered light pipe is used for mixing illumination light for uniformity. An aspheric lens is positioned in front of the LCD panel for magnifying the image and placing the virtual image at a desire viewing distance in front of the driver. As compactness is one major concern, the light path, including illumination and imaging light path, could be folded for minimizing the overall volume of the device. Two HUD models using the abovementioned concept and configuration have been built. Due to its powerful display capability, this proposed HUD can show all the necessary navigation information just like a popular portable navigation device. Hopefully, it will appear on the after-market recently.
參考文獻
[1] Yung-Ching Liu and Ming-Hui Wen, "Comparison of Head-up display(HUD) vs. head-down display(HDD): driving performance of commercial vehicle operators in Taiwan," International Journal of Human-Computer Studies, vol.61, 2004.
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[6] Jennifer Colegrove, "Emerging Display Technologies and Market," SID Display Applications Conference, 2007.