JPS5595465A - Protective device of television receiver - Google Patents
Protective device of television receiverInfo
- Publication number
- JPS5595465A JPS5595465A JP180579A JP180579A JPS5595465A JP S5595465 A JPS5595465 A JP S5595465A JP 180579 A JP180579 A JP 180579A JP 180579 A JP180579 A JP 180579A JP S5595465 A JPS5595465 A JP S5595465A
- Authority
- JP
- Japan
- Prior art keywords
- voltage
- turns
- horizontal oscillation
- oscillation circuit
- pulse
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Details Of Television Scanning (AREA)
Abstract
PURPOSE:To protect effectively human bodies by preventing X-ray radiation by stopping the operation of a horizontal oscillation circuit when X-ray radiation can not be suppressed even by reducing it by increasing a horizontal oscillation frequency while lowering a high voltage. CONSTITUTION:As the anode voltage of CRT rises abnormally, a pulse applied to terminal 13 increases and a DC voltage obtained by rectifying 10 and smoothing 11 this pulse becomes larger. As a result, the base potential of transistor element 1 becomes greater than that of element 2 and element 1 turns OFF while element 2 turns ON. Through the conduction of element 1, element 14 turns OFF and element 17 turns ON. As a result, element 21 conducts to flow a current through capacitor 26 and when its across voltage exceeds a fixed value, element 29 is ON. At this time, the horizontal oscillation circuit increases in frequency to decrease a voltage pulse, suppressing X-rays through this repetitive operation. With a high voltage excessive, the voltage across capacitor 26 is high to turn element 24 ON, and elements 19 and 24 both turn ON successively. In consequence, the oscillation of the horizontal oscillation circuit stops and radiation of X-rays disappears.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP180579A JPS5595465A (en) | 1979-01-11 | 1979-01-11 | Protective device of television receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP180579A JPS5595465A (en) | 1979-01-11 | 1979-01-11 | Protective device of television receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5595465A true JPS5595465A (en) | 1980-07-19 |
Family
ID=11511782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP180579A Pending JPS5595465A (en) | 1979-01-11 | 1979-01-11 | Protective device of television receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5595465A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61189075A (en) * | 1985-02-15 | 1986-08-22 | Matsushita Electric Ind Co Ltd | X-ray protection circuit |
| EP0498589A2 (en) * | 1991-02-07 | 1992-08-12 | Nokia Display Products Oy | A method and a coupling for decreasing the detrimental radiation caused by a cathode-ray tube |
| US7239063B2 (en) | 2003-01-23 | 2007-07-03 | Asmo Co., Ltd. | Motor having supply brushes |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125723A (en) * | 1977-04-08 | 1978-11-02 | Victor Co Of Japan Ltd | Abnormal voltage prevention unit for electronic units |
-
1979
- 1979-01-11 JP JP180579A patent/JPS5595465A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53125723A (en) * | 1977-04-08 | 1978-11-02 | Victor Co Of Japan Ltd | Abnormal voltage prevention unit for electronic units |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61189075A (en) * | 1985-02-15 | 1986-08-22 | Matsushita Electric Ind Co Ltd | X-ray protection circuit |
| EP0498589A2 (en) * | 1991-02-07 | 1992-08-12 | Nokia Display Products Oy | A method and a coupling for decreasing the detrimental radiation caused by a cathode-ray tube |
| US7239063B2 (en) | 2003-01-23 | 2007-07-03 | Asmo Co., Ltd. | Motor having supply brushes |
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