Patent ID: 8837094
Filing Date: 2014-09-16
Classification: G02F,H02M,H05B

Abstract:
1. A DC/AC inverter substrate having a voltage abnormality detector circuit, the voltage abnormality detector circuit comprising: a transformer; a connection point for connecting to a lamp; a low voltage side detection sensor that is disposed at the connection point without being electrically connected to the connection point; a low-voltage voltage abnormality detector circuit that receives a sense voltage from the low voltage side detection sensor and outputs an abnormality detection signal when the sense voltage is equal to or higher than a set value; and a control circuit that receives the abnormality detection signal from the low-voltage voltage abnormality detector circuit and stops transformer output, wherein the low voltage side detection sensor is disposed in a vicinity of a terminal of the lamp return current side of the connection point without being electrically connected to the connection point, and wherein the closest distance between the low voltage side detection sensor and the connection point is 1 to 10 mm.