Driving circuit for display device, and test circuit and...

Electric lamp and discharge devices: systems – Current and/or voltage regulation

Reexamination Certificate

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Details

C315S169100, C315S169300, C345S098000, C345S092000, C345S211000, C345S212000, C324S750300, C324S762010, C324S762020, C257S355000, C257S357000

Reexamination Certificate

active

08054005

ABSTRACT:
A driving circuit, which drives a display panel in a voltage range between a high negative voltage and a high positive voltage, includes: an electric charge discharging circuit; and a test external terminal. The electric charge discharging circuit connects a first terminal supplied with the high negative voltage to a second terminal of a ground voltage in response to a drop of a power source voltage. The test external terminal is connected to the electric charge discharging circuit. The high negative voltage is supplied to the semiconductor substrate. The electric charge discharging circuit interrupts a connection between the first terminal and the second terminal based on a control signal from the test external terminal.

REFERENCES:
patent: 6621228 (2003-09-01), Harada et al.
patent: 7072218 (2006-07-01), Fujito et al.
patent: 7187373 (2007-03-01), Tobita
patent: 7227523 (2007-06-01), Ishikawa et al.
patent: 2005-331927 (2005-12-01), None
patent: 2007-94016 (2007-04-01), None

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