LIQUID CRYSTAL DISPLAY DEVICE AND POWER SOURCE SUPPLYING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a power source supplying device which is capable of reducing the number of mounting components of a thermistor and the like and at the same time which is capable of supplying power performing the temperature compensation of the temperature characteristics being the objects of a drive such as a liquid crystal display element or the like and also which is capable of reducing power consumption of the display element and a liquid crystal display device using the power source supplying device. SOLUTION: In a liquid crystal display device capable of changing over an operation mode to an all-screen display mode and a partial display mode by changing the number of driving scanning electrodes among entire scanning electrodes of a liquid crystal display panel, a power source supplying circuit 4 is provided with a switching circuit 9 stopping the supply of a second power source voltage in the case of the partial display mode between first and second power source voltages whose temperature gradients are different and an adding circuit 8 outputting a driving voltage having a prescribed temperature gradient in accordance with a power source voltage to be supplied. Then, the temperature gradient of the driving voltage roughly coincides with the temperature gradient of the light transmissivity of the display panel in the case of the all-screen display mode and is within temperature gradient maintaining the transmissivity of the display panel to be roughly constant when the display panel is driven based on the driving voltage having that temperature gradient in the case of the partial display mode.