Modulation circuit and image display using the same
US6771281B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 30, 2001 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Nov 28, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2320/0276
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A modulation circuit for outputting a pulse signal modulated in accordance with the value of input data by a predetermined period, comprising a clock generation circuit for generating and outputting a first clock pulse changing in frequency by the predetermined period, a clock counting circuit for receiving the first clock pulse, counting the first clock pulse from a predetermined initial value in an initial stage of the predetermined period, and outputting a clock count and a pulse signal output circuit for comparing magnitudes of the clock count and the value of the input data and inverting a level of the pulse signal in the vicinity of a time when the magnitudes of the clock count and the value of the input data invert.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.