Patent ID: 8199026

Claim:
A quantification indicating circuit which is suitable to be disposed on a circuit board, the quantification indicating circuit comprising: an indicating lighten element set having a plurality of indicating lighten elements; a converting circuit which receives a numerical signal of the circuit board and compares the numerical signal with a plurality of threshold values in the converting circuit to output a plurality of control bits; and an indicating lighten element control circuit controlling the number of the indicating lighten elements which are brightened according to a first control bit, a second control bit, and a third control bit, the indicating lighten element control circuit comprises: a first logic circuit comprising three diodes whose input terminals are connected to the first control bit, the second control bit and the third control bit, respectively; a second logic circuit comprising two diodes whose input terminals are connected to the first control bit and the second control bit, respectively; a third logic circuit comprising a diode whose input terminal is connected to the first control bit; a fourth logic circuit comprising two diodes whose output terminals are connected to the first control bit and the second control bit, respectively, wherein a high voltage is provided for a first common input terminal of the two diodes; and a fifth logic circuit comprising three diodes whose output terminals are connected to the first control bit, the second control bit and the third control bit, respectively, wherein the high voltage is provided for a second common input terminal of the three diodes.