发明名称 |
DRIVING CIRCUIT AND DISPLAY DEVICE USING SAME |
摘要 |
PURPOSE:To secure an action in the area of safe operation(ASO) of a Darlington connection NPN transistor and to obtain a driving circuit having a sufficient current driving capacity by switching the number of the steps of a Darlington connection. CONSTITUTION:In a sink side switch composed of Darlington connected NPN transistors 71-73, a base current supply source is provided at bases 72 and 73 of the NPN transistor behind the intermediate step except a first step NPN transistor 71. At the time of discharging a picture element 10, the control of a sink side switch 7 is executed with the base current supply source. Thus, the action in the ASO of a Darlington connection transistor is secured and a driving circuit to bring out the current driving capacity to the maximum is obtained. |
申请公布号 |
JPH01276820(A) |
申请公布日期 |
1989.11.07 |
申请号 |
JP19880104228 |
申请日期 |
1988.04.28 |
申请人 |
HITACHI LTD;HITACHI ENG CO LTD |
发明人 |
OKUTSU MITSUHIKO;ABE KENJI;KARIYA TADAAKI |
分类号 |
H03K17/567;H03K17/08;H03K17/615;H03K17/66 |
主分类号 |
H03K17/567 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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