SYSTEM FOR MEASURING LIGHT LEVELS FROM A DISPLAY PROJECTOR

摘要

A system for measuring light levels from a display projector comprises a projection screen (2), a display projector (4), and a light measuring device (3). The projection screen has a front surface with a light measuring area (10). The display projector has a light source (22) that projects about 100 percent white light on the light measuring area. The light measuring device measures the intensity of the white light on the light measuring area. The light source is then adjusted depending on the measurement of the intensity of the white light on the light measuring area.