Display driving apparatus

Details Display driving apparatus Display driving apparatus

2011-08-09

2011-08-09

Mengistu, Amare (Department: 2629)

Computer graphics processing and selective visual display system

Display driving control circuitry

C345S211000, C345S212000, C361S056000

Reexamination Certificate

active

07995046

ABSTRACT:
A display driving device outputting a driving signal to a display includes a high-voltage power supply terminal, an output terminal, a high-side output transistor connected between the high-voltage power supply terminal and the output terminal, a reference power supply terminal, a low-side output transistor connected between the output terminal and the reference power supply terminal, a buffer circuit including two MOS transistors connected in series, and a discharge element discharging charge stored in a gate of the low-side output transistor, wherein the gate of the low-side output transistor is connected to a connecting point of the two MOS transistors and the discharge element. Thus, even if electrostatic discharge is repeatedly applied to the output terminal by a positive charge as against the ground potential in the display driving apparatus, the low-side output transistor can be prevented from being damaged without charge stored in the gate of the low-side output transistor.

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patent: 5946177 (1999-08-01), Miller et al.
patent: 6348831 (2002-02-01), Baba
patent: 2005/0035960 (2005-02-01), Kobayashi
patent: 2007/0109698 (2007-05-01), Kim
patent: 2008/0205100 (2008-08-01), Sakamoto
patent: 2005-176298 (2005-06-01), None

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