Ink injection type writing system using amplitude-modulated electrical signals
US4072958A · kind A · utility
13Cited by
4References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 2, 1976 |
| Grant date | Feb 7, 1978 |
| Priority date | — |
| Expiry date | Apr 2, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/034
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An ink ejection system of the invention includes an electrical circuit generating sinusoidal wave pulses and a liquid applying unit operable to discharge the liquid in pulsed jets in response to the sinusoidal wave pulses. The circuit comprises means for generating a sinusoidal signal of constant amplitude and frequency higher than the highest instantaneous frequency of a video signal, and means for modulating the amplitude of the sinusoidal signal in accordance with the video signal to generate a signal containing no harmonic components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.