本研究論文就在各製程就先行做調整,就可以減少Gamma的偏移, 事先控制在最佳化的Gamma數值內。那樣可以縮短製程參數調整,加快產品產出速度,這就是俗稱的防範重於治療。由於人的眼睛感受亮度是呈現指數函數關係,通常是以Gamma參數值來表示,然而TFT-LCD呈現並非人眼所預期的亮度為Gamma 2.2~2.5,所以我們必須要有矯正的機制,使得TFT-LCD呈現出來的亮度是與人眼感覺相符。 因為TFT-LCD液晶模型的透光率與供應的特性曲線,可發現液晶面板的轉換對於所加入電壓呈現非線性特徵。一般傳統Gamma矯正電路通常是用驅動晶體廠商的規格資料,可得知其畫素電壓在各灰階分別對應到各電壓 ,透過外部各節點的Gamma參考電壓,進行不同資料D/A轉換,輸出灰階電壓給面內畫素液晶分子。 在製作液晶面板時,訊號會透過許多的材料製程(如液晶liquid Crystal、TFT Thin film Transfer、偏光板polarizer、CF Color Filter、Glass…等),都是會影響到光的呈現,呈現的不同也就會有不同的Gamma數據。所以在製程變因數之關係加以分析並以不同於一般產品的設計,來呈現更近乎Gamma 2.2~2.5 的變化。 本研究論文就是針對這個問題點加以探討,製程變因數之關係加以分析,並以不同於一般產品的設計,在各製程就先行做調整,就可以減少Gamma的偏移, 事先控制在最佳化的Gamma數值內。來呈現更近佳Gamma 2.2~2.5 內的變化並改善減少產品參數的調整加快產品產出的速度。這就是俗稱的防範重於治療。
Since the human eye feel brightness exponentially with function. this brightness represents the Gamma parameter values. However, TFT-LCD showing the human eye is not expected brightness of gamma 2.2~2.5, so we must have a corrective faculty, making the presentation of the TFT-LCD brightness is consistent with the human eye. In the production of LCD panel, the signal through many the manufacturing process of materials, such as liquid crystal, thin film transfer, polarizer, color filter, glass...etc. manufacturing process of materials are light will affect presentation, the performance of different data will have different Gamma. Traditional method modify each node of gamma reference voltage in the external circuit of chip, that can change different data D/A converter, and the gray scale voltage output to the pixel in the panel. This research paper is the first to make adjustments in the manufacturing process, we can reduce offset the gamma value, control optimization within the gamma value in advance. That can shorten the process parameters to adjust the time, and to accelerate the speed product output.