Patent ID: 6765549
Filing Date: 2004-07-20
Classification: G09G,H01L

Abstract:
A display device comprising:a first pixel comprising a first switching TFT, a first SRAM, a first EL driver TFT, and a first EL element wherein the first switching TFT is electrically connected to the first EL driver TFT through the first SRAM; a second pixel adjacent to said first pixel, said second pixel comprising a second switching TFT, a second SRAM, a second EL driver TFT and a second EL element wherein the second switching TFT is electrically connected to the second EL driver TFT through the second SRAM; a gate signal line electrically connected to a gate electrode of the first switching TFT and a gate electrode of the second TFT; a first source signal line and a second source signal line, each extending across said gate signal line wherein one of a source region or a drain region of the first switching TFT is connected to the first source signal line and one of a source region or a drain region of the second switching TFT is connected to the second source signal line; an electric power supply line extending across said gate signal line wherein said electric power supply line is located between said first signal line and said second signal line and is commonly connected to said first and second EL driver TFTs, wherein the first SRAM stores a digital data signal input to the first SRAM from the first source signal line through the first switching TFT, until the next digital data signal is input to the first SRAM,wherein at least one of said first and second SRAM comprises two p-channel TFTs, an n-channel TFT, and a resistor, source regions of the two p-channel TFTs are each connected to the high voltage side electric power supply, a drain region of one p-channel TFT is connected to a drain region of the n-channel TFT, and a drain region of the other p-channel TFT is connected to the low voltage side electric power supply through the resistor, and a source region of the n-channel TFT is connected to the low voltage side electric power supply.