Clock generator and organic light emitting display (OLED)...

Details Clock generator and organic light emitting display (OLED)... Clock generator and organic light emitting display (OLED)...

2006-08-18

2008-03-04

Richards, N. Drew (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Clock or pulse waveform generating

C327S108000

Reexamination Certificate

active

07339413

ABSTRACT:
A clock generator, which can be included in an Organic Light Emitting Display (OLED), includes four switching units and two inverters. Each of the switching units includes two transistors. Transistors of two switching units that are connected to a high-level voltage line are PMOS transistors, and transistors of two switching units that are connected to a low-level voltage line are NMOS transistors. The switching units are sequentially turned on/off in response to four control signals so that the clock generator generates a clock signal. Each of the control signals has a duty ratio of 50%, and there is a phase difference of 90° between the control signals. The clock signal alternates between a low level and a high level every ¼ of a cycle of each of the control signals.

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