CN201178304Y - Television set having over-current protection for USB port - Google Patents
Television set having over-current protection for USB port Download PDFInfo
- Publication number
- CN201178304Y CN201178304Y CNU2008200929588U CN200820092958U CN201178304Y CN 201178304 Y CN201178304 Y CN 201178304Y CN U2008200929588 U CNU2008200929588 U CN U2008200929588U CN 200820092958 U CN200820092958 U CN 200820092958U CN 201178304 Y CN201178304 Y CN 201178304Y
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- over
- usb port
- microprocessor
- television set
- overcurrent
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- 238000001514 detection method Methods 0.000 claims abstract description 4
- 230000001681 protective effect Effects 0.000 claims description 16
- 238000012790 confirmation Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000002045 lasting effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model relates to a television under the over-current protection of a USB port. The television comprises a micro-processor and an over-current protecting device for detecting the USB port over-current. The starting ENABLE pin and the negative mark FLAG pin of the over-current protecting device are connected with the I/O port of the micro-processor. When the over-current protecting device detects that the over-current occurs in the USB port, the negative mark FLAG pin is set as the low electrical level and sends an over-current detection signal to the micro-processor. When the microprocessor detects that the negative mark FLAG pin is continuously at the low electrical level within a pre-determined time, the starting ENABLE pin is set as the high electrical level and the over-current protecting device is switched off. The television can thoroughly switch off the power supply to the USB device after the confirmation of the actual presence of the over-current. The television displays the related information or makes the specific sound to remind a user of carrying out corresponding treatment.
Description
Technical field
The utility model relates to television set, more particularly, relates to a kind of television set of USB port overcurrent protection.
Background technology
Very many television set bands have been arranged at present on the market USB port, simultaneously USB device on the market is of a great variety, very different, may break down or short circuit during USB interface on receiving television set, cause electric current sharply to increase, might burn out USB device even burn out the electric power system of television set; And break down or short circuit when causing overcurrent when USB device, the user does not know that probably fault has taken place or does not know where fault occurs in, thereby can not in time fix a breakdown and allow USB device be in malfunction always, might cause bigger injury to USB device, even may have influence on the operate as normal of whole set of television power supply.
The utility model content
The technical problems to be solved in the utility model is, at the above-mentioned defective of prior art, provides a kind of television set of USB port overcurrent protection.
The technical scheme that its technical problem that solves the utility model adopts is: the television set of constructing a kind of USB port overcurrent protection, comprise microprocessor and the overcurrent protective device that is used to detect the USB port overcurrent, the startup ENABLE pin of overcurrent protective device is connected with the I/O port of microprocessor with negative indicia FLAG pin; When the overcurrent protective device detected USB port and overcurrent occurs, negative indicia FLAG pin was set to low level and sends the over-current detection signal to microprocessor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, start the ENABLE pin and be set to high level and turn-off overcurrent protective device.
In the television set of USB port overcurrent protection described in the utility model, described television set also comprises audio video processor and display screen, and microprocessor is connected with audio video processor, and display screen is connected with audio video processor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, send alarm signal to audio video processor, to drive display screen display alarm.
In the television set of USB port overcurrent protection described in the utility model, described television set also comprises loudspeaker arrangement, and described loudspeaker arrangement is connected with audio video processor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, send alarm signal to audio video processor, to drive the loudspeaker arrangement sounding alarm.
Preferably, described loud speaker is loudspeaker.
Implement the television set of USB port overcurrent protection of the present utility model, have following beneficial effect: can continue to detect by a period of time, the physical presence of confirming overcurrent be with the power supply of thorough shutoff to USB device.And show relevant information on TV or send specific sound and remind the user to make corresponding processing.Realized USB when protection by tv display screen information or loudspeaker output alarm sound, and the mode that screen shows and two operations of chimes of doom start simultaneously points out user USB overcurrent, comparing conventional art need not increase cost, and more humane.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the circuit block diagram of television set one embodiment of the utility model USB port overcurrent protection.
Embodiment
As shown in Figure 1, in television set one embodiment of USB port overcurrent protection of the present utility model, a kind of television set of USB port overcurrent protection, comprise microprocessor, video processor, display screen, loudspeaker arrangement, be used to detect the overcurrent protective device of USB port overcurrent, the startup ENABLE pin of overcurrent protective device is connected with the I/O port of microprocessor with negative indicia FLAG pin; Microprocessor is connected with audio video processor, and display screen is connected with audio video processor respectively with loudspeaker arrangement; When the overcurrent protective device detected USB port and overcurrent occurs, negative indicia FLAG pin was set to low level and sends the over-current detection signal to microprocessor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, start the ENABLE pin and be set to high level and turn-off overcurrent protective device; Send alarm signal to audio video processor simultaneously, to drive display screen display alarm and to drive the loudspeaker arrangement sounding alarm.
During operate as normal, the ENABLE of overcurrent protective device is a low level, the overcurrent protective device conducting, and 5V_Supply is connected with Vbus, and USB device obtains power supply, and FLAG is a high level, and prompting microprocessor USB device is working properly; When USB device hinders or short circuit when causing electric current sharply to increase for some reason; overcurrent protective device detects overcurrent; start autoprotection mechanism electric current is limited in a very little safe value; play the effect of temporary protection USB device; simultaneously FLAG is dragged down; inform microprocessor USB device generation overcurrent; microprocessor starts timing program (as several seconds); state at this section lasting monitoring of microprocessor FLAG in the time; if during this period of time; FLAG is the words that overcurrent continues existence for hanging down always; then microprocessor is drawn high ENABLE; turn-off overcurrent protective device; 5V_Supply and Vbus disconnect; play the effect of thorough protection USB device; start the OSD program of TV simultaneously; on screen, show relevant prompt text information or send specific alarm sound or screen message and two operations of alarm sound are sent simultaneously; after the user presses on certain remote controller or the keypad arbitrarily button; microprocessor thinks that the user has handled fault; then close OSD program and alarm sound; again drag down ENABLE, recover power supply USB device.If during this period of time, fault is got rid of overcurrent and is disappeared, and promptly microprocessor is read FLAG and uprised level, does not then carry out any processing.
The utility model describes by several specific embodiments, it will be appreciated by those skilled in the art that, under the situation that does not break away from the utility model scope, can also carry out various conversion and be equal to alternative the utility model.In addition, at particular condition or concrete condition, can make various modifications to the utility model, and not break away from scope of the present utility model.Therefore, the utility model is not limited to disclosed specific embodiment, and should comprise the whole execution modes that fall in the utility model claim scope.
Claims (4)
1, a kind of television set of USB port overcurrent protection, comprise microprocessor, it is characterized in that, also comprise the overcurrent protective device that is used to detect the USB port overcurrent, the startup ENABLE pin of overcurrent protective device is connected with the I/O port of microprocessor with negative indicia FLAG pin; When the overcurrent protective device detected USB port and overcurrent occurs, negative indicia FLAG pin was set to low level and sends the over-current detection signal to microprocessor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, start the ENABLE pin and be set to high level and turn-off overcurrent protective device.
2, the television set of USB port overcurrent protection according to claim 1 is characterized in that, described television set also comprises audio video processor and display screen, and microprocessor is connected with audio video processor, and display screen is connected with audio video processor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, send alarm signal to audio video processor, to drive display screen display alarm.
3, the television set of USB port overcurrent protection according to claim 2 is characterized in that, described television set also comprises loudspeaker arrangement, and described loudspeaker arrangement is connected with audio video processor; When microprocessor when a preset value detects negative indicia FLAG pin and is continuously low level in the time, send alarm signal to audio video processor, to drive the loudspeaker arrangement sounding alarm.
4, the television set of USB port overcurrent protection according to claim 3 is characterized in that, described loud speaker is loudspeaker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200929588U CN201178304Y (en) | 2008-03-28 | 2008-03-28 | Television set having over-current protection for USB port |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200929588U CN201178304Y (en) | 2008-03-28 | 2008-03-28 | Television set having over-current protection for USB port |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201178304Y true CN201178304Y (en) | 2009-01-07 |
Family
ID=40218326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200929588U Expired - Fee Related CN201178304Y (en) | 2008-03-28 | 2008-03-28 | Television set having over-current protection for USB port |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201178304Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388349A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Automatic water supplying control system |
| CN109256819A (en) * | 2017-07-12 | 2019-01-22 | 中兴通讯股份有限公司 | Mobile terminal charger guard method, device, mobile terminal and USB |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
-
2008
- 2008-03-28 CN CNU2008200929588U patent/CN201178304Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388349A (en) * | 2012-05-11 | 2013-11-13 | 四川优的科技有限公司 | Automatic water supplying control system |
| CN109256819A (en) * | 2017-07-12 | 2019-01-22 | 中兴通讯股份有限公司 | Mobile terminal charger guard method, device, mobile terminal and USB |
| CN110933383A (en) * | 2018-09-19 | 2020-03-27 | 青岛海信电器股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
| CN110933383B (en) * | 2018-09-19 | 2022-04-29 | 海信视像科技股份有限公司 | Overcurrent protection method and device for antenna control chip and satellite television receiver |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090107 Termination date: 20110328 |