| 摘要 |
A light source 5 for a computer or television display 7, for example an LCD backlight, is arranged so as to be capable of being switched on or off by a control system 4. This switching is synchronised with a vision shuttering system 2 which is made alternately either transparent or opaque, and is done at a rapid rate at which human vision perceives a continuous rather than intermittent view. The light source is controlled so as to be on when the shuttering system is transparent, and off when it is opaque. The effective ratio, averaged over time, between light from the synchronised light source and light from other sources (e.g. glare from reflected sunlight), can thus be improved without increasing the (average) light power which the light is required to generate. Shuttering systems include, for example, LCD shutter glasses or goggles.
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