Light valve

A light valve (LV) is a device for varying the quantity of light, from a source, which reaches a target. Examples of targets are computer screen surfaces, or a wall screen in the case of a light projector.

There are two basic principles of achieving this. One is by deflecting the light on its way to the target (a reflective LV). The other method is to block the light (a transmissive LV).

单词	Light valve
释义	Light valve 英语百科 Light valve A light valve (LV) is a device for varying the quantity of light, from a source, which reaches a target. Examples of targets are computer screen surfaces, or a wall screen in the case of a light projector. There are two basic principles of achieving this. One is by deflecting the light on its way to the target (a reflective LV). The other method is to block the light (a transmissive LV).
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