Unit for determining the type of a dominating light source by means of two photodiodes

摘要

The invention relates to a unit (1) for determining the dominant light source type in electromagnetic radiation (2) incident on the unit (1) and generated from a plurality of light sources of different types. The unit comprises at least one first photodiode (10) designed to detect electromagnetic radiation in the visible spectral range and to generate a first output signal (11). The unit comprises at least one second photodiode (20) designed to detect electromagnetic radiation in the infrared spectral range and to generate a second output signal (21). The unit comprises at least one calculation unit (30) designed to derive a quotient result (23) and a frequency result (13) from the first (11) and second (21) output signals. The frequency result (13) provides information about the presence or absence of signal components in a predetermined frequency range contained in the electromagnetic radiation. The unit comprises at least one evaluation unit (40) designed to derive the dominant light source type from the quotient result (23) and the frequency result (13).

主权项

1. A unit for determining a dominant light source type in electromagnetic radiation incident on the unit and generated from a plurality of light sources of different types, comprising:
at least one first photodiode designed to detect electromagnetic radiation in the visible spectral range and to generate a first output signal; at least one second photodiode designed to detect electromagnetic radiation in the infrared spectral range and to generate a second output signal; at least one calculation unit designed to derive a quotient result and a frequency result from the first and second output signals, the frequency result providing information about the presence or absence of signal components in a predetermined frequency range contained in the electromagnetic radiation; and at least one evaluation unit designed to derive the dominant light source type from the quotient result and the frequency result, wherein the calculation unit comprises a first determination unit designed to integrate the first output signal, and wherein the first determination unit is designed to perform a plurality of integrations with different time constants.