METHOD FOR DRIVING LIGHT SOURCE AND LIGHT SOURCE DRIVING CIRCUIT, LIGHT SOURCE ASSEMBLY HAVING THE LIGHT SOURCE DRIVING CIRCUIT AND DISPLAY APPARATUS

摘要

PPROBLEM TO BE SOLVED: To provide a method of driving a light source for compensating fluctuation of a light quantity of the light source by every light color without using a color sensor. PSOLUTION: The light source is driven by the following steps. First, driving signals, each having a reference frequency different in the reference frequency, are provided to a plurality of color light sources, each emitting different color light by predetermined duty ratio and adjusts light quality of the plurality of color light sources to a value according to duty ratio of the driving signals. Next, light in which different color light emitted from the plurality of color light sources is mixed is detected to output a detection signal. Then, components of a frequency band in which reference frequency belongs are extracted by a filter to output the components as a plurality of color signals. Furthermore, the plurality of color signals are utilized to output a light quality control signal. Here, the light quality control signal indicates target values of the plurality of color light sources by every color. After that, the duty ratio of the driving signal is adjusted based on the light quality control signal. PCOPYRIGHT: (C)2009,JPO&INPIT