A photo-sensing type touch panel embedded liquid crystal display device and a method for driving same are disclosed, where the device includes a liquid crystal panel includes a touch sensor provided in each of n pixels, where n is a Natural Number; a ROIC readout part which receives a readout voltage value from readout lines provided in the touch panel embedded liquid crystal panel; an ADC conversion part which converts an analog voltage value transmitted to the ROIC readout part into a digital value; a calculation part which calculates a calculated value by subtracting a corresponding value detected from the ADC conversion part when no-backlight is applied from a value detected from the ADC conversion part when a backlight is applied; and a position detection part for detecting a touch point on the photo-sensing type touch panel if the calculated value from the calculation part is beyond a predetermined value.