6、光学参数

6.1 液晶模组光学特性

6.2  测量系统

6.2.1 LCM  观看角度

Viewing angle is the angle at which the contrast ratio is greater than 10.The angles are determined for the horizontal or x axis and the vertical or y axis with respect to the z axis which is normal to the LCD surface.（视角是指对比度大于10时的角度。这些角度是为水平或x轴和垂直或y轴相对于垂直于液晶显示屏表面的z轴而确定的。

6.2.2  反应时间

Response time is the time required for the display to transition from white to black

(Rising time, Tr) and from black to white (Falling time, Tf) for additional information.（响应时间是指显示器从白色转换为黑色所需的时间 （上升时间，Tr)和从黑色到白色（下降时间，Tf)，以获取更多信息。）

6.2.3 对比度（CR）

Contrast Ratio (CR) is defined mathematically as:

                                  Surface Lumi nance with all white pixels

Contrast Ratio = ————————————————————

                                 Surface Lumi nance with all black pixels

Surface lumi nance is the center point across the LCD surface 500mm from the surface with all pixels displaying white. （表面亮度是距离液晶显示器表面500mm的中心点，所有像素都显示为白色。