Panasonic ET-ELW21C Operating Instructions Manual page 24

z 投影距离计算方法
z Projection distance formulas
下表中的尺寸可能略有误差。
在下表的计算公式中， 句点代表小数点。
The dimensions of the following table contain a slight error.
Periods are used to represent decimal points in the calculation formulas in the following
table.
z PT-SMZ77C / PT-SMZ67C / PT-SMZ57C / PT-SLZ77C
ET-ELW21C 当屏幕宽高比为 16:10 时
When the screen aspect ratio is 16:10
当屏幕宽高比为 16:9 时
When the screen aspect ratio is 16:9
当屏幕宽高比为 4:3 时
When the screen aspect ratio is 4:3
ET-ELW20C 当屏幕宽高比为 16:10 时
When the screen aspect ratio is 16:10
当屏幕宽高比为 16:9 时
When the screen aspect ratio is 16:9
当屏幕宽高比为 4:3 时
When the screen aspect ratio is 4:3
ET-ELT22C 当屏幕宽高比为 16:10 时
When the screen aspect ratio is 16:10
当屏幕宽高比为 16:9 时
When the screen aspect ratio is 16:9
当屏幕宽高比为 4:3 时
When the screen aspect ratio is 4:3
ET-ELT23C 当屏幕宽高比为 16:10 时
When the screen aspect ratio is 16:10
当屏幕宽高比为 16:9 时
When the screen aspect ratio is 16:9
当屏幕宽高比为 4:3 时
When the screen aspect ratio is 4:3
12
附表 / Appendix
L
LW
= 0.6763 x SD - 0.0577
= 0.6951 x SD - 0.0577
= 0.7656 x SD - 0.0577
= 1.0557 x SD - 0.0555
= 1.0851 x SD - 0.0555
= 1.1952 x SD - 0.0555
= 2.3662 x SD - 0.1140
= 2.4320 x SD - 0.1140
= 2.6788 x SD - 0.1140
= 3.8667 x SD - 0.2123
= 3.9742 x SD - 0.2123
= 4.3775 x SD - 0.2123
( 单位 / Unit : m)
LT
= 1.4374 x SD - 0.0534
= 1.4774 x SD - 0.0534
= 1.6273 x SD - 0.0534
= 3.8583 x SD - 0.1129
= 3.9656 x SD - 0.1129
= 4.3680 x SD - 0.1129
= 6.1416 x SD - 0.2108
= 6.3123 x SD - 0.2108
= 6.9529 x SD - 0.2108