Abstract: A lighting device includes a light guide plate configured to guide and diffuse a light from a light source, and a garnish body including a lighting area to which the diffused light is radiated, wherein the light guide plate is disposed at a predetermined angle with respect to the garnish body.

Abstract: A feedback control method for a chaos system that automatically determines a control condition based on a control bifurcation (CB) phenomenon uses adaptive tracking to adjust control parameters based on an analysis of the output of the chaos system, and uses feedback to achieve a control condition based on the control parameters. Feedback control is performed irrespective of variations in the parameter of the chaos system. The feedback control method includes an adaptive tracking step for analyzing a chaos system output and for adaptively-tracking a value of a control parameter in accordance with the analyzed system output, and a feedback control step for performing feedback control to vary a system parameter and a state variable of the chaos system in accordance with the control parameter.