通过流明、屏幕尺寸、增益和宽高比计算投影机屏幕亮度(英尺朗伯和尼特)。获取ANSI/SMPTE标准评估。
Calculating Screen Brightness is a fundamental and crucial step in home theater design. It is not just about measuring distance; it must be designed based on scientific evidence to maximize human visual perception limits and immersion. Incorrect settings can cause eye strain or fail to take advantage of resolution benefits. This tool complies with industry standards such as THX and SMPTE guides to provide the most precise data.
This system utilizes complex trigonometry and optical formulas. Based on the input variables (screen size, resolution, viewing angle, etc.), it simultaneously calculates the minimum distance where pixels do not appear clustered and the maximum immersion distance that fills the entire field of view. All results are reflected in real-time, suggesting figures optimized for the user's environment.
输入投影机流明数、屏幕对角线尺寸、宽高比和屏幕增益。计算器计算屏幕面积(平方英尺),然后将流明×增益除以面积得到英尺朗伯(fL)。
ANSI/SMPTE标准推荐暗室家庭影院SDR内容基准16 fL。低于12 fL图像显得暗淡,无法实现HDR。高于22 fL在有环境光的房间也能提供足够亮度。
屏幕增益放大视线方向的光线。增益1.0(哑光白)均匀反射光线。高增益(1.5–2.5)提高亮度但缩小视角。家庭影院推荐增益1.0–1.3。
英尺朗伯(fL)是测量屏幕亮度的单位,表示从屏幕反射到观看者方向的光亮度。ANSI/SMPTE标准推荐暗室家庭影院SDR内容基准16 fL。低于12 fL图像显得暗淡,无法实现HDR。
增益1.0屏幕基准,100英寸16:9屏幕达到16 fL(SDR标准)需要约1,800流明。增益1.3屏幕约需1,400流明。HDR 48 fL需要约5,400流明。
屏幕增益是相对于参考白色表面向观看者方向反射光线的倍数。增益1.0(哑光白)均匀向各方向反射光线。高增益(1.5–2.5)将光线集中向前,提高亮度但缩小视角。
SMPTE 196M推荐暗室SDR内容基准16英尺朗伯(55尼特)。HDR内容基准为48 fL(164尼特)。商业影院目标14–16 fL。
英尺朗伯乘以3.426得到尼特(cd/m²)。例如:16 fL × 3.426 = 54.8尼特。反之,尼特除以3.426得到英尺朗伯。