Provided are a display device with low power consumption which enables
reduction of an operation processing amount of a GPU and which does not
require a storage device for storing image data corresponding to one
screen, and a display system using the display device. The display device
is constituted by pixels each including storage circuits, an operation
processing circuit, and a display processing circuit and circuits each
having a function of storing image data in arbitrary storage circuits.
The display system is constituted by the display device and an image
processing device including the GPU. Image data is formed for each
structural component through operation processing in the GPU in the
display system. The formed image data is stored in the corresponding
storage circuit for each pixel. The stored image data is subjected to
composition processing by the operation processing circuit for each
pixel. Then, the image data is converted into an image signal in the
display processing circuit.