| 摘要 |
A semiconductor integrated circuit (10) for driving liquid crystal is provided with an output terminal connected to a display panel; an output circuit block including a DAC circuit (8) which can be connected to the output terminal; and an auxiliary output circuit block including a DAC circuit (28) which can be connected to the output terminal. The semiconductor integrated circuit is also provided with an operation amplifier (1) which compares an output signal outputted from the DAC circuit (8) with an output signal outputted from the DAC circuit (28); a judging circuit (3) which judges whether the DAC circuit (8) is failure or not, based on the comparison results obtained from the operation amplifier (1); and switches (2c, 2d), which connect the DAC circuit (28) as a substitute for the DAC circuit (8), to the output terminal, in the case where the judgment result obtained from the judgment circuit (3) indicated failure of the output circuit. Thus, the integrated circuit for driving the display device is provided with the specific means for easily detecting defects of the output circuit, and is permitted to self-repair a defect in the case where the defect is detected in the output circuit.
|
