Patent ID: 7145543

Claim:
An image display comprising: a pixel display circuit displaying a pixel density corresponding to a potential of a data holding node; a data write circuit applying one of first and second potentials to said data holding node in accordance with an image signal; and a refresh circuit refreshing a potential at said data holding node in response to a refresh signal when the potential at said data holding node exceeds a third potential, between the first and second potentials, and not refreshing the potential at said data holding node in response to a refresh signal when the potential at said data holding node does not exceed the third potential, wherein said refresh circuit includes: a first capacitor having first and second electrodes, the second electrode receiving the refresh signal, said capacitor having a capacitance varying according to potential difference between the first and second electrodes; a first field effect transistor, connected between the first electrode of said first capacitor and said data holding node, and having a gate electrode receiving a first drive potential; and a second field effect transistor having a first electrode receiving a second drive potential, having a second electrode connected to said data holding node, and having a gate electrode connected to the first electrode of said first capacitor.