Scanning circuit for image device and driving method for scanning circuit
US5872563A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1994 |
| Grant date | Feb 16, 1999 |
| Priority date | — |
| Expiry date | Nov 2, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2310/0283
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bidirectional scanning circuit for a peripheral driving circuit for a liquid crystal display, a contact-type image sensor, a liquid crystal shutter, a vacuum fluorescent display or the like is improved in operation speed and yield in production. In the scanning circuit, a data signal is successively delayed and transferred to produce scanning pulse signals to be outputted. The scanning circuit comprises a plurality of switching transistors connected in cascade connection such that each switching transistor receives a data signal outputted from a preceding switching transistor and passes the data signal so as to be applied to a following switching transistor in response to a pair of clock signals, a plurality of feedback circuits each for receiving a signal outputted from a corresponding switching transistor in response to a further pair of clock signals and compensating for a drop of the signal level of the thus received signal, and a plurality of buffer circuits for individually receiving signals successively outputted from the feedback circuits and individually outputting the received signals as scanning pulse signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.