PROJECTION DEVICE

摘要

The invention specifies a projection device having a light modulator which has a light reception region with a cross-sectional area to be illuminated having the size AM and with a maximum acceptance angle for incident light, and having at least one light source, by means of which, during its operation, a cone of light is produced for illuminating the cross-sectional area of the light reception region and which has a number N of luminescence diode chips having a maximum emission angle. At least one of the luminescence diode chips has a radiation output area having the size AD. The following relationship applies: 0.7*(A_M * sin²(a ))/(A_D * sin²(ß ) * n²) = N = 1.3*(A_M * sin²(a))/(A_D * sin²( ß) * n²), where n is equal to 1 or equal to the refractive index of a coupling medium with which the luminescence diode chips are provided.