Bidirectional shift register and image display device using the same
US8803782B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jun 21, 2011 |
| Grant date | Aug 12, 2014 |
| Priority date | — |
| Expiry date | Aug 7, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2330/025
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A bidirectional shift register outputs pulses from a plurality of cascaded unit register circuits in a shift order which is one of a forward direction and a reverse direction. A λth stage of unit register circuit (38) has two set terminals connected to respective outputs of (λ−1)th and (λ+1)th stages and two reset terminals connected to respective outputs of (λ+2)th and (λ−2)th stages. The unit register circuit (38) sets, when a pulse is input to any one of the set terminals, a reference point N1 to an H level, and, when a pulse is input to any one of the reset terminals, N1 to an L level. The order of phase change of clock signals is reversed according to the direction of a shift, and whether a start trigger signal is applied to a top stage or a bottom stage is switched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.