Patent ID: 8471884
Filing Date: 2013-06-25
Classification: B41J,G03G,H01L

Abstract:
1. A driving device that drives a light emitting thyristor array including plural stages of light emitting thyristors that each include a first terminal commonly connected to a common power source, a second terminal commonly connected to a common terminal, and a first control terminal that performs on-off switching between the first and second terminals, the driving device comprising: a first driving circuit that is operated by the power source and that drives the common terminal to high and low logic levels; a scanning circuit that includes plural stages of scanning thyristors that each include a third terminal commonly connected to the common power source, a fourth terminal, second and third control terminals that each perform on-off switching between the third and fourth terminals, the second control terminal being connected to the first control terminal of a corresponding one of the light emitting thyristors, the scanning circuit sequentially driving each of the plural stages of the light emitting thyristors by controlling the scanning thyristors; and a second driving circuit that is operated by the power source, that generates a first clock signal and a second clock signal for driving the scanning circuit, and that outputs the first and second clock signals from a first clock terminal and a second clock terminal, respectively, wherein the fourth terminal of each odd numbered stage of the scanning thyristors is commonly connected to the first clock terminal, the fourth terminal of each even numbered stage of the scanning thyristors is commonly connected to the second clock terminal, the second control terminal of a first stage scanning thyristor is connected to the second clock terminal, and the third control terminal of a previous scanning thyristor is connected to the second control terminal of a subsequent scanning thyristor via an electrical connection part.