发明名称 |
Display device driving voltage providing circuit |
摘要 |
A voltage dividing circuit provides an intermediate level potential or intermediate level potentials between the maximum and minimum level potentials necessary for dynamic- or scanning-driving a liquid crystal display device. The voltage dividing circuit includes at least one insulated gate field effect transistor and a plurality of resistive elements each with relatively small resistance connected in series between power source terminals. The insulated gate field effect transistor is enabled during a fixed time interval at the initial stage of one display cycle to provide drive voltage to the liquid crystal display device with low output resistance. A first dividing circuit including low resistive elements enabled by an insulated gate field effect transistor or transistors may be connected in parallel with a second dividing circuit including relatively high resistive elements which provides the intermediate level potential or potentials with the same level as of the first dividing circuit.
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申请公布号 |
US4158786(A) |
申请公布日期 |
1979.06.19 |
申请号 |
US19770818295 |
申请日期 |
1977.07.22 |
申请人 |
TOKYO SHIBAURA ELECTRIC CO., LTD. |
发明人 |
HIRASAWA, MASATAKA |
分类号 |
G09G3/18;(IPC1-7):H03K1/00;G06F3/14 |
主分类号 |
G09G3/18 |
代理机构 |
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