Frequency dependent X-ray protection for a multimedia monitor
US6282071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 1999 |
| Grant date | Aug 28, 2001 |
| Priority date | — |
| Expiry date | Nov 8, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C55/00
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A frequency compensation circuit influences an X-radiation protection (XRP) circuit in a high voltage regulator circuit for a cathode ray tube (CRT) to operate properly under varying frequencies of voltage energizing a high voltage transformer. The frequency compensation circuit includes an input to a source of first voltage related to a high voltage output of the high voltage regulator circuit, a voltage source generator responsive to a high voltage generator frequency of the CRT. A voltage controlled circuit is responsive to the voltage source generator for controlling conveyance of the first voltage to the XRP circuit so that a relatively constant proportion of the high voltage output is reported to the XRP circuit under varying high voltage generator frequencies.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.