CN101159810B - Field failure protection relieving circuit and method of television set - Google Patents
Field failure protection relieving circuit and method of television set Download PDFInfo
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- CN101159810B CN101159810B CN 200710123664 CN200710123664A CN101159810B CN 101159810 B CN101159810 B CN 101159810B CN 200710123664 CN200710123664 CN 200710123664 CN 200710123664 A CN200710123664 A CN 200710123664A CN 101159810 B CN101159810 B CN 101159810B
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- circuit
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- failure protection
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- 238000000034 method Methods 0.000 title claims abstract description 12
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 230000001681 protective effect Effects 0.000 claims description 10
- 238000012423 maintenance Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007257 malfunction Effects 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
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Abstract
The invention discloses a TV set field invalid protection release circuit and a method. The invention is to solve technical problem of judging the fault part of a TV set conveniently and timely. A circuit and a CPU provided by the invention are connected with a field pulse forming circuit and the input/output port of the field pulse forming circuit is connected with a field invalid protection release circuit. The method of the invention comprises the following steps: when the TV set is turned on, the CPU detects the set release of the filed invalid protection circuit; After the turn-on of the TV set, the CPU carries out the field invalid detection; when the field scanning invalidation is detected, the TV set enters into the protection state; when the protection circuit has set the release of the field invalid protection, which is detected, then the TV set is turned on. Compared with the existing technology, the CPU of the invention can fast judge whether it is the field scanning invalid protection, thus the field invalid protection is released quickly and the TV set can be turned on. The invention is convenient in maintenance. The invention overcomes the former problems that the protection circuit functions after the circuit is invalid but can not turn on the TV set and the circuit is hard to maintain.
Description
Technical field
The present invention relates to protective circuit and the method for a kind of television set, particularly a kind of television set.
Background technology
Television set extensively is used in people's daily life, industry control, scientific research, study and information propagating.In the situation of the television set inefficacy on the scene of prior art, its protective circuit works, and makes television set enter standby or picture blanking state, in case fault expansion, thereby play the effect of protecting the television set complete machine.At the field failure protection state, although protective circuit can make TV set enter standby or picture blanking state, play a protective role.But can't failure judgement be by which position of television set to be lost efficacy to cause, be unfavorable for promptly and accurately failure judgement position and convenient for maintaining.
Summary of the invention
The purpose of this invention is to provide a kind of television airdrome failure protection relieving circuit and method, the technical problem that solve is the convenient trouble location of in time judging television set.
The present invention is by the following technical solutions: a kind of television airdrome failure protection relieving circuit, the central processing unit of television set are connected with field pulse and form circuit, and the I/O port of described central processing unit is connected with field failure protection relieving circuit.
Field failure protection relieving circuit of the present invention is an I/O mouth of television set central processing unit (MCU), or a multiplexing I/O mouth is provided with switching device.
A kind of television airdrome failure protection relieving method may further comprise the steps: one, central processing unit detects the releasing field failure protection circuit that arranges during television boot-strap; Two, behind the television boot-strap, central processing unit carries out a failure detection; Three, when central processing unit detected the field scan inefficacy, television set entered guard mode; Four, central processing unit detects protective circuit the setting of releasing field failure protection has been set, and then television set is opened.
Behind the method television boot-strap of the present invention, central processing unit carries out the protection project and detects.
An I/O mouth of television set central processing unit of the present invention (MCU), or a multiplexing I/O mouth is output as low level and then can removes the field failure protection function.
An I/O mouth of television set central processing unit of the present invention (MCU), or a multiplexing I/O mouth ground connection then can be removed the field failure protection function.
The present invention compared with prior art; input/output interface at central processing unit connects the protection relieving circuit; central processing unit determines whether the field scan fail safe fast from several guard modes; thereby remove fast field failure protection; allow television set open; be convenient to maintenance, overcome in the past behind the circuit malfunction protective circuit and played effect and can not start shooting, can't judge the problem of failure site, difficult maintenance.
Description of drawings
Fig. 1 is the method flow diagram of the embodiment of the invention.
Fig. 2 is the circuit block diagram of the embodiment of the invention.
Fig. 3 is the circuit theory diagrams of Fig. 2.
Embodiment
Below in conjunction with drawings and Examples the present invention is described in further detail.As shown in Figure 1, television airdrome failure protection relieving method of the present invention may further comprise the steps: one, central processing unit detects the releasing field failure protection circuit that arranges during television boot-strap; Two, behind the television boot-strap, central processing unit carries out a failure detection, and whether the I/O level that detects is low level, and low level represents that the field failure protection function removes; Three, when central processing unit detected the field scan inefficacy, television set entered guard mode; Four, central processing unit detects protective circuit the setting of releasing field failure protection has been set, and then television set is opened.More than three, 4 two steps can judge simply that this moment, whether television set was that field scan was lost efficacy or the inefficacy of other functions.Television set is provided with protective circuit, and the setting of releasing field failure protection is set, and television set just can not lose efficacy because of the field and not enter guard mode, and TV set circuit is unlocked, so that detect and the maintenance television set.
As shown in Figure 2; television airdrome failure protection relieving circuit of the present invention, the central processor MCU of television set are connected with field pulse and form circuit, an I/O port I/O of central processor MCU; or a multiplexing I/O mouth, be connected with field failure protection relieving circuit.
As shown in Figure 3; 1): an I/O mouth selecting television set central processing unit (MCU); an or multiplexing I/O mouth; 2): carry out hardware for this I/O mouth and remove the field failure protection function setting; as adding a K switch 1 at a multiplexing I/O mouth; if K1 is closed, namely direct current DC ground connection then can be removed the field failure protection function.If K1 opens, then the field failure protection function is effective.MCU is exactly that the state that arranges according to this I/O mouth judges whether to remove the field failure protection function.
The present invention is in the situation of the large effect of television airdrome; guard mode produces; central processor MCU concludes whether it is in the field failure protection relieving state; if; then do not enter the field failure protection state after the start, otherwise, the field failure protection state entered; the phenomenon that so just can very clearly cause complete machine not start shooting field failure protection state and other reason makes a distinction, so that maintenance.
Claims (2)
1. television airdrome failure protection relieving circuit, the central processing unit of television set is connected with field pulse and forms circuit, it is characterized in that: the I/O port of described central processing unit is connected with field failure protection relieving circuit, described field failure protection relieving circuit is an I/O mouth of television set central processor MCU, or a multiplexing I/O mouth is provided with switching device; Described television airdrome failure protection relieving circuit, the employing following methods is realized: one, central processing unit detects the releasing field failure protection circuit that arranges during television boot-strap, described field failure protection relieving circuit is an I/O mouth of television set central processor MCU, or a multiplexing I/O mouth is provided with switching device; Two, behind the television boot-strap, central processing unit carries out a failure detection; Three, when central processing unit detected the field scan inefficacy, television set entered guard mode; Four, central processing unit detects protective circuit the setting of releasing field failure protection has been set, and then television set is opened;
Behind the described television boot-strap, central processing unit carries out the protection project and detects;
An I/O mouth of described television set central processor MCU, or a multiplexing I/O mouth is output as low level and then can removes the field failure protection function;
An I/O mouth of described television set central processor MCU, or a multiplexing I/O mouth ground connection then can be removed the field failure protection function.
2. television airdrome failure protection relieving method, may further comprise the steps: one, central processing unit detects the releasing field failure protection circuit that arranges during television boot-strap, described field failure protection relieving circuit is an I/O mouth of television set central processor MCU, or a multiplexing I/O mouth is provided with switching device; Two, behind the television boot-strap, central processing unit carries out a failure detection; Three, when central processing unit detected the field scan inefficacy, television set entered guard mode; Four, central processing unit detects protective circuit the setting of releasing field failure protection has been set, and then television set is opened;
Behind the described television boot-strap, central processing unit carries out the protection project and detects;
An I/O mouth of described television set central processor MCU, or a multiplexing I/O mouth is output as low level and then can removes the field failure protection function;
An I/O mouth of described television set central processor MCU, or a multiplexing I/O mouth ground connection then can be removed the field failure protection function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710123664 CN101159810B (en) | 2007-09-29 | 2007-09-29 | Field failure protection relieving circuit and method of television set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200710123664 CN101159810B (en) | 2007-09-29 | 2007-09-29 | Field failure protection relieving circuit and method of television set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101159810A CN101159810A (en) | 2008-04-09 |
| CN101159810B true CN101159810B (en) | 2013-03-27 |
Family
ID=39307714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200710123664 Expired - Fee Related CN101159810B (en) | 2007-09-29 | 2007-09-29 | Field failure protection relieving circuit and method of television set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101159810B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176301A (en) * | 1977-03-17 | 1979-11-27 | U.S. Philips Corporation | Circuit arrangement for supplying a protection signal for a television picture display tube |
| CN2114253U (en) * | 1991-10-08 | 1992-08-26 | 王钦贺 | Protector of tv receiver |
| CN2357450Y (en) * | 1998-11-16 | 2000-01-05 | 海信集团公司 | Field output feedback device for TV set or display device |
| KR20020008722A (en) * | 2000-07-25 | 2002-01-31 | 구자홍 | The method of shut off power stabilization in video display appliance |
| US20020054235A1 (en) * | 2000-11-07 | 2002-05-09 | Hirofumi Okabe | CRT display device |
| CN1787600A (en) * | 2004-12-09 | 2006-06-14 | Tcl王牌电子(深圳)有限公司 | Protecting circuit for TV set kinescope |
-
2007
- 2007-09-29 CN CN 200710123664 patent/CN101159810B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4176301A (en) * | 1977-03-17 | 1979-11-27 | U.S. Philips Corporation | Circuit arrangement for supplying a protection signal for a television picture display tube |
| CN2114253U (en) * | 1991-10-08 | 1992-08-26 | 王钦贺 | Protector of tv receiver |
| CN2357450Y (en) * | 1998-11-16 | 2000-01-05 | 海信集团公司 | Field output feedback device for TV set or display device |
| KR20020008722A (en) * | 2000-07-25 | 2002-01-31 | 구자홍 | The method of shut off power stabilization in video display appliance |
| US20020054235A1 (en) * | 2000-11-07 | 2002-05-09 | Hirofumi Okabe | CRT display device |
| CN1787600A (en) * | 2004-12-09 | 2006-06-14 | Tcl王牌电子(深圳)有限公司 | Protecting circuit for TV set kinescope |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101159810A (en) | 2008-04-09 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130327 Termination date: 20180929 |