CN202634565U - Television set with voltage reverse apply protecting circuit - Google Patents
Television set with voltage reverse apply protecting circuit Download PDFInfo
- Publication number
- CN202634565U CN202634565U CN 201220250789 CN201220250789U CN202634565U CN 202634565 U CN202634565 U CN 202634565U CN 201220250789 CN201220250789 CN 201220250789 CN 201220250789 U CN201220250789 U CN 201220250789U CN 202634565 U CN202634565 U CN 202634565U
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- Prior art keywords
- television set
- voltage
- circuit
- voltage reverse
- external
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- 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.)
- Expired - Lifetime
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- 230000001681 protective effect Effects 0.000 claims description 8
- 239000002699 waste material Substances 0.000 abstract description 5
- 102100023170 Nuclear receptor subfamily 1 group D member 1 Human genes 0.000 description 2
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Abstract
The utility model relates to a television set with a voltage reverse apply protecting circuit. The television set with the voltage reverse apply protecting circuit comprises an external connecting port, and is characterized by also comprising a comparison amplifying circuit, wherein the comparison amplifying circuit compares the voltage of a 5V power supply end of the television with the voltage of a 5V power end of the external connecting port; the 5V power supply end is connected with the 5V power end through a switch circuit; and an output end of the comparison amplifying circuit controls the on and off of the switch circuit. By the television set with the voltage reverse apply protecting circuit, the problems that external equipment is damaged by voltage reverse apply, and the service life of the external equipment is shortened can be solved, and the waste of energy of the television set caused by the voltage reverse apply can be reduced.
Description
Technical field
The utility model relates to a kind of television set of anti-filling protective circuit with voltage.
Background technology
LCD TV external equipment (for example: portable hard drive, wireless network card, USB Hub etc.) for guaranteeing the external equipment operate as normal, provides system power supply to external equipment usually, controls opening or closing of external equipment power supply through mains switch.Under the present this mode, when external equipment is that active equipment itself is when just having power supply (for example active USB Hub, equipment such as portable hard drive); When the AC power supplies of LCD TV has pulled out; Because the power supply of external equipment instead is irritated back system end, cause system board still working, be in closed condition and TV is backlight because of no AC power supplies; Cause the user to think TV being in closed condition, but reality is still in work.The anti-filling of this voltage not only can cause the damage of external equipment, and descend to useful life, but also the power consumption that can waste television set causes the waste of the energy.
Summary of the invention
The purpose of the utility model provides a kind of television set of anti-filling protective circuit with voltage, can solve because of voltage is anti-and irritate the damage that causes external equipment, and the problem that descend to useful life simultaneously, reduces the anti-waste of irritating the TV energy that causes of voltage.
The utility model adopts following scheme to realize: a kind of television set of anti-filling protective circuit with voltage; The external-connected port that comprises television set; It is characterized in that; Also comprise: an amplifying circuit relatively, this is the relatively voltage of the 5V feeder ear of this television set and the 5V power end voltage of said external-connected port of amplifying circuit relatively; Said 5V feeder ear is connected with described 5V power end through a switching circuit; The described relatively output of amplifying circuit is controlled the open and close of said switching circuit.
In the utility model one embodiment, described external-connected port is a USB interface.
In the utility model one embodiment, described television set is a lcd television set.
The utility model compares through the voltage with the 5V power end of the 5V feeder ear of television set and external-connected port; Judge whether external equipment has that power supply is counter irritates, and power supply is counter irritates if having, then cut off the 5V power supply of system for TV set; Thoroughly solve the damage that causes external equipment because of the anti-filling of voltage; The problem that descend to useful life simultaneously, reduces the anti-waste of irritating the TV energy that causes of voltage.
Description of drawings
Fig. 1 is that the utility model embodiment circuit structure connects sketch map.
Fig. 2 is the circuit theory sketch map of the utility model USB interface.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further specified.
As shown in Figure 1; Present embodiment provides a kind of television set of anti-filling protective circuit with voltage; The external-connected port that comprises television set; It is characterized in that, also comprise: an amplifying circuit relatively, this is the relatively voltage of the 5V feeder ear of this television set and the 5V power end voltage of said external-connected port of amplifying circuit relatively; Said 5V feeder ear is connected with described 5V power end through a switching circuit; The described relatively output of amplifying circuit is controlled the open and close of said switching circuit.Present embodiment is given described relatively amplifying circuit with the voltage of said 5V feeder ear 1 and 5V power end 2 and is compared; If the voltage of the voltage of 5V power end 2 is higher than the voltage of said 5V feeder ear 1; Then judge the anti-system for TV set that is poured into of power supply of external equipment; This is amplifying circuit output control signal relatively, cuts off described electric switch circuit.
See also Fig. 2, the described television set of the utility model is a lcd television set, and described external-connected port is a USB interface.This external equipment comprises portable hard drive, wireless network card, USB Hub etc.
The above is merely the preferred embodiment of the utility model, and all equalizations of being done according to the utility model claim change and modify, and all should belong to the covering scope of the utility model.
Claims (3)
1. the television set of an anti-filling protective circuit with voltage; The external-connected port that comprises television set; It is characterized in that, also comprise: an amplifying circuit relatively, this is the relatively voltage of the 5V feeder ear of this television set and the 5V power end voltage of said external-connected port of amplifying circuit relatively; Said 5V feeder ear is connected with described 5V power end through a switching circuit; The described relatively output of amplifying circuit is controlled the open and close of said switching circuit.
2. the television set of anti-filling protective circuit with voltage according to claim 1 is characterized in that: described external-connected port is a USB interface.
3. the television set of anti-filling protective circuit with voltage according to claim 1 is characterized in that: described television set is a lcd television set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250789 CN202634565U (en) | 2012-05-31 | 2012-05-31 | Television set with voltage reverse apply protecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220250789 CN202634565U (en) | 2012-05-31 | 2012-05-31 | Television set with voltage reverse apply protecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202634565U true CN202634565U (en) | 2012-12-26 |
Family
ID=47387703
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220250789 Expired - Lifetime CN202634565U (en) | 2012-05-31 | 2012-05-31 | Television set with voltage reverse apply protecting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202634565U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810820A (en) * | 2015-05-15 | 2015-07-29 | 深圳市共进电子股份有限公司 | USB (Universal Serial Bus) power supply circuit |
-
2012
- 2012-05-31 CN CN 201220250789 patent/CN202634565U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810820A (en) * | 2015-05-15 | 2015-07-29 | 深圳市共进电子股份有限公司 | USB (Universal Serial Bus) power supply circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121226 |