Registered Active-Matrix Field Emission Display and Its Driving Method

Inventors

Yoon-Ho Song, Kim Dae Jun, Jeong Jin-Woo, Lee Jin Ho, Kang Kwang-Yong

Application No.

12096595 (2006.11.27)

Publication No.

20080284314 (2008.11.20)

Registration No.

8054249 (2011.11.08)

Country

UNITED STATES

Abstract

Provided is a field emission display (FED) capable of driving on the basis of current and preventing leakage current caused by thin film transistors (TFTs). The FED includes: a plurality of unit pixels including an emission element in which cathode luminescence of a phosphor occurs and a TFT for driving the emission element; a current source for applying a scan signal to each unit pixel; and a voltage source for applying a data signal to each unit pixel. Here, the on-current of the current source is high enough to take care of the load resistance and capacitance of a scan row within a given writing time, and the off-current of the current source is so low that the electron emission of each pixel can be ignored. In addition, the pulse amplitude or pulse width of the data signal applied from the voltage source is changed, and thereby the gray scale of the display is represented.

KSP Keywords

Cathode luminescence, Current source, Driving method, Electron emission, Field Emission, Field emission displays(FEDs), Gray-scale, Leakage Current, Matrix field, Off current, Thin-Film Transistor(TFT), load resistance, on-current, pulse amplitude, pulse width, thin film(TF), voltage source