Patent ID: 9076406
Filing Date: 2015-07-07
Classification: G09G,H02M

Abstract:
1. A power supplying unit for a liquid crystal display device, comprising: a power integrated circuit configured to generate a source voltage and a compensation voltage, the compensation voltage linearly varying according to an ambient temperature; and a charge pumping part configured to generate a gate high voltage using the source voltage and the compensation voltage, the gate high voltage linearly varying when the ambient temperature is lower than a reference temperature, wherein the power integrated circuit comprises: a boosting part configured to generate the source voltage; a linear low temperature compensating part configured to generate the compensation voltage; and a level shifting part configured to output the gate high voltage by switching, wherein the linear low temperature compensating part comprises: a compensation controlling part configured to generate a compensation control voltage corresponding to the ambient temperature; and a low temperature compensating part configured to generate the compensation voltage according to the compensation control voltage, and wherein the low temperature compensating part comprises: a second temperature sensing part configured to output a second sense voltage; and a first transistor configured to output the second sense voltage as the compensation voltage by switching according to the compensation control voltage.