Abstract: A color data signal (DATA) and the control signal (CTL) are supplied from a central processor to a display controller, and an address conversion parameter included in the control signal (CTL) is stored in a control register 5. In accordance with the address conversion parameter, display address generating means 6 performs address conversion to generate a display address, and in accordance with the display address, the color data signal (DATA) is stored in a primary storage means 7. Thereafter, an image signal is outputted via image signal outputting means 8 to a display panel. This makes it possible to provide the display controller which can reduce a mounting area and power consumption and reduce the load of a processing on the central processor which performs a processing for editing image data.

Abstract: The invention provides a display device which is capable of adjusting the image refresh rate to an optimal value regardless of the type of image data, and thus has low power consumption. The display device includes a liquid crystal panel for displaying images, a liquid crystal controller for refreshing images displayed in the liquid crystal panel according to an image data signal, and a CPU for inputting the image data signal to the liquid crystal controller. In the display device, the CPU has a discrimination section for discriminating whether the image data is a moving image or a still image based on an input interval of the image data from the CPU to the liquid crystal controller, and the liquid crystal controller has an image refresh demand signal generation circuit for changing the image refresh rate of the liquid crystal panel based on the result of discrimination by the CPU.

Abstract: A color data signal (DATA) and the control signal (CTL) are supplied from a central processor to a display controller, and an address conversion parameter included in the control signal (CTL) is stored in a control register 5. In accordance with the address conversion parameter, display address generating means 6 performs address conversion to generate a display address, and in accordance with the display address, the color data signal (DATA) is stored in a primary storage means 7. Thereafter, an image signal is outputted via image signal outputting means 8 to a display panel. This makes it possible to provide the display controller which can reduce a mounting area and power consumption and reduce the load of a processing on the central processor which performs a processing for editing image data.

Abstract: The invention provides a display device which is capable of adjusting the image refresh rate to an optimal value regardless of the type of image data, and thus has low power consumption. The display device includes a liquid crystal panel for displaying images, a liquid crystal controller for refreshing images displayed in the liquid crystal panel according to an image data signal, and a CPU for inputting the image data signal to the liquid crystal controller. In the display device, the CPU has a discrimination section for discriminating whether the image data is a moving image or a still image based on an input interval of the image data from the CPU to the liquid crystal controller, and the liquid crystal controller has an image refresh demand signal generation circuit for changing the image refresh rate of the liquid crystal panel based on the result of discrimination by the CPU.