Device and method for displaying images

PURPOSE: An image display apparatus and a method thereof are provided to prevent color mix, color break-up, and a flicker phenomenon and to improve color purity and brightness. CONSTITUTION: An image display apparatus includes an image analysis unit(210), a power voltage generator(250), a lamp driver(260), and a backlight(270). The image analysis unit provides an analysis result which is related with an area which has a color of different property from a peripheral area by analyzing a received unit frame image. The power voltage generator receives an AC voltage of 110V or 220V from the outside and generates and outputs various sizes of DC voltage. The lamp driver converts the voltage which is provided from the power voltage generator and provides to the backlight. The backlight operates LEDs differently according to whether the area which has a color of different property is included or not. [Reference numerals] (200) Interface unit; (210) Image analysis unit; (220) Timing controller; (230-1) Gate driver; (230-2) Source driver; (240) Display panel; (250) Power voltage generator; (260) Lamp driver; (270) Backlight; (280) Reference voltage generator; (AA) Image input; (BB) Data, control signal; (CC) Control signal