CN201277998Y - Power-on indication circuit for electric power - Google Patents
Power-on indication circuit for electric power Download PDFInfo
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- CN201277998Y CN201277998Y CNU2008201460360U CN200820146036U CN201277998Y CN 201277998 Y CN201277998 Y CN 201277998Y CN U2008201460360 U CNU2008201460360 U CN U2008201460360U CN 200820146036 U CN200820146036 U CN 200820146036U CN 201277998 Y CN201277998 Y CN 201277998Y
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- filter capacitor
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Abstract
The utility model relates to a power source power-on indicating circuit which is characterized by comprising resistors R1, R2 and R3, a PNP transistor Q1, NPN transistor Q2, filter capacitors C1 and C2 and a dichromatic light emitting diode D. The utility model can be used for prompting intuitively after a device terminal is powered on, thereby avoiding the defect that the terminal is powered on for a long time under the unused situations. Moreover the utility model has the advantages of novel concept and simple and practical circuit.
Description
Technical field
The utility model relates to a kind of equipment energising indicating circuit technology, particularly a kind of power indicating circuit.
Background technology
Existing electric equipment is after energising, and its pilot lamp only lights when terminal works, but does not show after the terminal energized, causes the user can't judge directly whether terminal powers on.The long charged static that is easy to generate of equipment, and very easily some accurate devices of equipment are caused damage.
Summary of the invention
The purpose of this utility model is that a kind of power supply energising indicating circuit will be provided, this circuit not only has the in running order function of the consumer of demonstration, and be under the holding state situation at equipment and also can be in electriferous state by display device, thereby avoided terminal under operating position not, long charged.
The utility model power supply energising indicating circuit is characterised in that: by resistance R 1, R2, R3, and PNP transistor Q1, NPN transistor Q2, filter capacitor C1, C2 and dichromatic LED D form; One end of described resistance R 1 links to each other with the negative pole of dichromatic LED D, and the other end links to each other with an end of resistance R 2 and ground connection; The other end of described resistance R 2 links to each other with the base stage of PNP transistor Q1, the emitter-base bandgap grading of NPN transistor Q2; The collector of described PNP transistor Q1 links to each other with the positive pole [1] of dichromatic LED D, and its emitter-base bandgap grading links to each other with the end of NPN transistor Q2 collector, filter capacitor C1; The base stage of described NPN transistor Q2 links to each other with the positive pole [2] of dichromatic LED D, the end of filter capacitor C2 by resistance R 3; The other end of described filter capacitor C2, the filter capacitor C1 other end are connected between resistance R 1, the R2;
The positive 5V of accessory power supply that described NPN transistor Q2 collector connects power supply, the positive pole of described dichromatic LED D [2] meet the positive 5V of primary power of power supply.
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Description of drawings
Fig. 1 is the circuit diagram of the utility model embodiment.
Embodiment
As shown in Figure 1, the utility model is by resistance R 1, R2, R3, PNP transistor Q1, and NPN transistor Q2, filter capacitor C1, C2 and dichromatic LED D form; One end of described resistance R 1 links to each other with the negative pole of dichromatic LED D, and the other end links to each other with an end of resistance R 2 and ground connection; The other end of described resistance R 2 links to each other with the base stage of PNP transistor Q1, the emitter-base bandgap grading of NPN transistor Q2; The collector of described PNP transistor Q1 links to each other with the positive pole [1] of dichromatic LED D, and its emitter-base bandgap grading links to each other with the end of NPN transistor Q2 collector, filter capacitor C1; The base stage of described NPN transistor Q2 links to each other with the positive pole [2] of dichromatic LED D, the end of filter capacitor C2 by resistance R 3, and the other end of filter capacitor C2, the filter capacitor C1 other end are connected between resistance R 1, the R2;
Among the figure+and 5VSB is the accessory power supply of Switching Power Supply, another group+5V is the primary power of Switching Power Supply.When circuit working, NPN transistor Q2 collector is connected with the positive 5V of the accessory power supply of power supply, the positive pole [2] of dichromatic LED D is connected with the positive 5V of the primary power of power supply.
The course of work of the present utility model is as follows: primary power turn-offs in standby, LED[2] (blue led) outage knocks out, but accessory power supply still works, and to the power supply of standby indicator light circuit, lights (red LED) standby indicating lamp of dual-colored LED [1].Q1 uses as switching tube at this circuit, obtains low level Q1 conducting by R2 under the situation of primary power+5V outage, lights LED[1] (red LED).In the time of the primary power power supply of+5V, LED[2] (blue led) be applied in the Hair Fixer light that powers on, and by resistance R 3 be applied with+voltage of 5V is to the base stage of triode Q2, make the Q2 conducting, the base stage level of Q1 drawn high+and 5V ends Q1, thus turn-offing red LED standby indicating lamp, R1 is the current-limiting resistance of LED among the figure, C1, C2 are that jamproof filter capacitor prevents misoperation.
The utility model can be after the device end energized intuitively prompting, avoided terminal under operating position not, long charged defective, and it is novel, circuit is simple and practical.
Claims (1)
1, a kind of power supply energising indicating circuit is characterized in that: by resistance R 1, R2, R3, and PNP transistor Q1, NPN transistor Q2, filter capacitor C1, C2 and dichromatic LED D form; One end of described resistance R 1 links to each other with the negative pole of dichromatic LED D, and the other end links to each other with an end of resistance R 2 and ground connection; The other end of described resistance R 2 links to each other with the base stage of PNP transistor Q1, the emitter-base bandgap grading of NPN transistor Q2; The collector of described PNP transistor Q1 links to each other with the positive pole [1] of dichromatic LED D, and its emitter-base bandgap grading links to each other with the end of NPN transistor Q2 collector, filter capacitor C1; The base stage of described NPN transistor Q2 links to each other with the positive pole [2] of dichromatic LED D, the end of filter capacitor C2 by resistance R 3; The other end of described filter capacitor C2, the filter capacitor C1 other end are connected between resistance R 1, the R2;
The positive 5V of accessory power supply that described NPN transistor Q2 collector connects power supply, the positive pole of described dichromatic LED D [2] meet the positive 5V of primary power of power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201460360U CN201277998Y (en) | 2008-10-28 | 2008-10-28 | Power-on indication circuit for electric power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201460360U CN201277998Y (en) | 2008-10-28 | 2008-10-28 | Power-on indication circuit for electric power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201277998Y true CN201277998Y (en) | 2009-07-22 |
Family
ID=40895584
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201460360U Expired - Fee Related CN201277998Y (en) | 2008-10-28 | 2008-10-28 | Power-on indication circuit for electric power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201277998Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104102564A (en) * | 2014-07-23 | 2014-10-15 | 浪潮电子信息产业股份有限公司 | Device for lighting bicolor LED lamp on basis of different power supply states |
| WO2016090573A1 (en) * | 2014-12-10 | 2016-06-16 | Thomson Licensing | Indicator circuit and apparatus using the same |
| EP2608515B1 (en) * | 2011-12-20 | 2019-03-20 | HP Printing Korea Co., Ltd. | Image forming aparatus with power saving mode |
-
2008
- 2008-10-28 CN CNU2008201460360U patent/CN201277998Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2608515B1 (en) * | 2011-12-20 | 2019-03-20 | HP Printing Korea Co., Ltd. | Image forming aparatus with power saving mode |
| CN104102564A (en) * | 2014-07-23 | 2014-10-15 | 浪潮电子信息产业股份有限公司 | Device for lighting bicolor LED lamp on basis of different power supply states |
| WO2016090573A1 (en) * | 2014-12-10 | 2016-06-16 | Thomson Licensing | Indicator circuit and apparatus using the same |
| US10477632B2 (en) | 2014-12-10 | 2019-11-12 | Interdigital Ce Patent Holdings | Indicator circuit and apparatus using the same |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHENZHEN YURONG SCIENCE AND TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: FUJIAN GUANYU SCIENCE AND TECHNOLOGY INVESTMENT CO., LTD. Effective date: 20100419 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 350003 A, 36/F, GLOBAL PLAZA, NO.158, WUSI ROAD, GULOU DISTRICT, FUZHOU CITY, FUJIAN PROVINCE TO: 518000 ROOM 1502, TOWER A, CHUANGXIN SCIENCE PLAZA STAGE I, FUTIAN DISTRICT, SHENZHEN CITY |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20100419 Address after: 518000, room 1502, block A, Futian District innovation and Technology Plaza, Shenzhen, China Patentee after: Shenzhen Yurong Technology Co.,Ltd. Address before: 36, 350003 floor, global Plaza, No. 54, 158 Road, Gulou District, Fujian, Fuzhou, A Patentee before: Fujian Chamory Sicence Technology Investment Co., Ltd. |
|
| 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: 20090722 Termination date: 20171028 |