A light emitting diode backlight driving circuit includes a plurality of LED light bars, a power supply driving the LED light bars to light, and comparing units corresponding to the LED light bars one by one. A method of heating water comprising the steps of transporting the water within at least one tube to a first combustion chamber provided in a downshot boiler and heating the first combustion chamber using a downshot burner such that the water within each tube is heated to a supercritical condition. The invention aims to propose a display method that reduces the blurring effect without causing color break-up.