A liquid crystal driving integrated circuit for generating liquid crystal driving voltages (VLCD0, VLCD1, VLCD2, VLCD3) that drive a liquid crystal panel in order to present a display, the voltages being provided from respective connection points of a plurality of serially connected resistor elements forming a first resistor, wherein a reference voltage (VLCD0) applied to one end of said first resistor is variable so as to adjust display contrast of said liquid crystal panel, said circuit further comprising: a second resistor formed by a plurality of serially connected resistor elements (R5, R6, R7), the second resistor being connected to a power supply (VLCD, VSS); characterised in that the liquid crystal driving integrated circuit further comprises: a reference voltage generation circuit having a selection circuit having a switching element (TG0-TG10, CAO-CA10) for selecting one of the voltages at respective connection points of said plurality of serially connected resistor elements (R5, R6, R7) forming said second resistor, supplying a voltage of a connection point selected by said switching element to a voltage follower and generating the output from the voltage follower as said reference voltage; a first switch circuit for selectively connecting said one end of said first resistor with the power supply (VLCD) or said reference voltage generation circuit; a second switch circuit for connecting or disconnecting said second resistor with or from the power supply (VLCD); and a circuit for enabling or disabling operation of said reference voltage generation circuit, wherein said first switch circuit is turned off and said second switch circuit is turned on when said reference voltage generation circuit is to be operated, and said first switch circuit is turned on and said second switch circuit is turned off when said reference voltage generation circuit is to be turned off. a second resistor formed by a plurality of serially connected resistor elements (R5, R6, R7), the second resistor being connected to a power supply (VLCD, VSS); characterised in that the liquid crystal driving integrated circuit further comprises: a reference voltage generation circuit having a selection circuit having a switching element (TG0-TG10, CAO-CA10) for selecting one of the voltages at respective connection points of said plurality of serially connected resistor elements (R5, R6, R7) forming said second resistor, supplying a voltage of a connection point selected by said switching element to a voltage follower and generating the output from the voltage follower as said reference voltage; a first switch circuit for selectively connecting said one end of said first resistor with the power supply (VLCD) or said reference voltage generation circuit; a second switch circuit for connecting or disconnecting said second resistor with or from the power supply (VLCD); and a circuit for enabling or disabling operation of said reference voltage generation circuit, wherein said first switch circuit is turned off and said second switch circuit is turned on when said reference voltage generation circuit is to be operated, and said first switch circuit is turned on and said second switch circuit is turned off when said reference voltage generation circuit is to be turned off. a reference voltage generation circuit having a selection circuit having a switching element (TG0-TG10, CAO-CA10) for selecting one of the voltages at respective connection points of said plurality of serially connected resistor elements (R5, R6, R7) forming said second resistor, supplying a voltage of a connection point selected by said switching element to a voltage follower and generating the output from the voltage follower as said reference voltage; a first switch circuit for selectively connecting said one end of said first resistor with the power supply (VLCD) or said reference voltage generation circuit; a second switch circuit for connecting or disconnecting said second resistor with or from the power supply (VLCD); and a circuit for enabling or disabling operation of said reference voltage generation circuit, wherein said first switch circuit is turned off and said second switch circuit is turned on when said reference voltage generation circuit is to be operated, and said first switch circuit is turned on and said second switch circuit is turned off when said reference voltage generation circuit is to be turned off.