| 发明名称 |
DRIVE CIRCUIT AND DISPLAY APPARATUS |
| 摘要 |
PROBLEM TO BE SOLVED: To provide a drive circuit and a display apparatus that prevents occurrence of an overcurrent at a high-voltage side operational amplifier and a low-voltage side operational amplifier. SOLUTION: The drive circuit in the display apparatus includes: the operational amplifiers 37A and 37B; and a control part. The operational amplifier 37A operates using a power-supply voltage VSS and a power-supply voltage VMM (VSS<VMM) and outputs a negative analog voltage. The operational amplifier 37B operates using the power-supply voltage VMM and a power-supply voltage VDD (VMM<VDD) and outputs a positive analog voltage. When a connection destination of the operational amplifier 37A is switched from a data line 31A to a data line 31B, the control part applies a voltage of VSS<V≤VMM+Vt (Vt is a threshold voltage of a SW2) to a gate of an n-channel type field-effect transistor SW2 to make the n-channel type field-effect transistor SW2 transit to a conduction state. COPYRIGHT: (C)2011,JPO&INPIT |
| 申请公布号 |
JP2011138008(A) |
申请公布日期 |
2011.07.14 |
| 申请号 |
JP20090298120 |
申请日期 |
2009.12.28 |
| 申请人 |
OKI SEMICONDUCTOR CO LTD |
发明人 |
HASEGAWA HIDEAKI;HARAYAMA KUNIHIRO;HIGUCHI KOUJI;HIRAMA ATSUSHI |
| 分类号 |
G09G3/36;G02F1/133;G09G3/20 |
主分类号 |
G09G3/36 |
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