CN202533696U - Micro projector with reversal power supply function - Google Patents
Micro projector with reversal power supply function Download PDFInfo
- Publication number
- CN202533696U CN202533696U CN2012201475790U CN201220147579U CN202533696U CN 202533696 U CN202533696 U CN 202533696U CN 2012201475790 U CN2012201475790 U CN 2012201475790U CN 201220147579 U CN201220147579 U CN 201220147579U CN 202533696 U CN202533696 U CN 202533696U
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- Prior art keywords
- power supply
- micro projector
- reverse
- circuit
- supplying power
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Abstract
The present utility model discloses a micro projector with a reversal power supply function. The micro projector is characterized in that the micro projector is provided with a reversal power supply circuit, and the reversal power supply circuit is composed of a built-in backup battery, a level converting circuit for converting the backup battery to a DC reversal power supply in a voltage-reducing way, and an output circuit of a standard USB interface. The micro projector is provided with the reversal power supply function, when the micro projector is connected with most mobile portable terminals, especially a smart phone MHL interface in an audio and video way, an HDMI interface, and a common MHL-to-HDMII bridging line adopting an HDMI solution scheme of US Silicon Image Company are combined to use, thus reversal power supply of the most mobile portable terminals, especially the smart phone can be realized. Moreover, the micro projector can also be independently used as a backup power supply to charge mobile portable equipment with a charging interface of DC 5V, especially a smart phone.
Description
Technical field
The utility model relates to the projection utensil, particularly relates to a kind of micro projector with reverse function of supplying power.
Background technology
Mobile high definition connects (Mobile High-Definition Link; Initialism is MHL) interface is the audio-visual standard interface that is used to connect portable consumer electronic device of the U.S. brilliant picture (Silicon Image) company research and development; Belong to high-definition digital multimedia interface (High Defnition Multimedia Interface; Initialism is HDMI) upgrade version; Only use a special-purpose MHL to change the HDMI bridging line; No matter be mobile phone, digital camera, digital camera and portable media player, all can pass through prior standard HDMI interface or common smart mobile phone charging inlet Micro USB (Universal Serial Bus, initialism are USB); The complete quality digital HD Audio/video data up to 1080p resolution is directly transmitted on the HDTV, and do not damage the high-resolution effect of film.Yet there is the long problem of stand-by time in the communication terminal of supporting the MHL interface at present particularly smart mobile phone, when the transmission tone video transmission, need give the power supply of MHL reverse interface.The backup battery that existing part minitype projection machine carries only is to be used for the minitype projection machine mobile working, and Shang Weijian has the micro projector with reverse function of supplying power.
Summary of the invention
The utility model technical matters to be solved is the defective that remedies above-mentioned prior art, and a kind of micro projector with reverse function of supplying power is provided.
The technical matters of the utility model solves through following technical scheme.
This characteristics with micro projector of reverse function of supplying power are:
Be provided with reverse feed circuit; The composition of said reverse feed circuit comprises built-in backup battery, said backup battery step-down is converted into the level shifting circuit of the reverse power supply of direct current; And the output circuit that comprises standard USB interface; The reverse power supply of said direct current can satisfy great majority and move the particularly charging demand of smart mobile phone of portable terminal device
The technical matters of the utility model solves through following further technical scheme.
Said built-in backup battery is a lithium battery.
Said standard USB interface and mobile portable terminal device be the charging inlet compatibility of smart mobile phone particularly.
The technical matters of the utility model solves through following further again technical scheme.
Be connected in series with holding circuit between reverse power supply of said direct current and the said standard USB interface; The reverse power supply of said direct current outputs to said USB interface via said holding circuit; Be used to limit maximum output current, externally the reverse feed circuit of protection do not damage under load overload or the short-circuit conditions.
Said holding circuit is a resettable fuse.
Said lithium battery is the lithium battery of 7.4V/1900mA.
The reverse power supply of said direct current is the reverse power supply of direct current 5V.
This micro projector with reverse function of supplying power also is provided with standard HDMI interface.
The utility model beneficial effect compared with prior art is:
The minitype projection machine of the utility model has reverse function of supplying power and great majority when moving portable terminal devices particularly smart mobile phone MHL interface audio frequency and video being connected; Through the MHL commentaries on classics HDMII bridging line supporting use of utilization U.S. crystalline substance common on HDMI interface and the market as the HDMI solution of company; For great majority move portable terminal device particularly smart mobile phone oppositely supply power; In addition; Can also be the particularly smart mobile phone charging of mobile portable equipment of direct current 5V for charging inlet separately, as its back-up source.
Description of drawings
Fig. 1 is the composition block scheme of the utility model embodiment and the user mode figure that charges with charging wire;
Fig. 2 is backup battery and the circuit diagram of level shifting circuit among Fig. 1;
Fig. 3 is the circuit diagram of the reverse power supply of the direct current among Fig. 1, holding circuit and output circuit;
Fig. 4 is the utility model embodiment is changeed the reverse power supply of HDMI bridging line with outside MHL user mode figure.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the utility model is described.
A kind of minitype projection machine shown in Fig. 1～4 with reverse function of supplying power; Comprise built-in 7.4V/1900mA reserve lithium battery, the step-down of reserve lithium battery be converted into the level shifting circuit of the reverse power supply of direct current 5V; And comprise and mobile the portable terminal device particularly compatible standard USB interface of the charging inlet of smart mobile phone and the output circuit of standard HDMI interface; The reverse power supply of direct current 5V can satisfy great majority and move the particularly charging demand of smart mobile phone of portable terminal device
Be connected in series with resettable fuse RC1 between reverse power supply of direct current 5V and the standard USB interface, be used to limit maximum output current, externally the reverse feed circuit of protection do not damage under load overload or the short-circuit conditions.
The back-up source of the 7.4V of this embodiment is the reserve lithium battery of 7.4V/1900mA, converts the reverse power supply of direct current 5V to through level shifting circuit, and the reverse power supply of direct current 5V is transported on the standard USB interface through resettable fuse RC1.
Be used for to mobile portable terminal device smart mobile phone when charging particularly; As long as will move the particularly standard USB interface of this embodiment of standard USB plug insertion of smart mobile phone charging wire of portable terminal device, the reverse power supply of direct current 5V can be to the particularly smart mobile phone charging of mobile portable terminal device.
When being used for changeing the HDMI bridging line and oppositely supplying power with outside MHL, as long as with the standard USB interface of this embodiment of connecting line insertion of standard USB plug, the reverse power supply of direct current 5V can to mobile portable terminal device particularly smart mobile phone direct current 5V is provided power supply.
Above content is the further explain that combines concrete preferred implementation that the utility model is done, and can not assert that the practical implementation of the utility model is confined to these explanations.Those of ordinary skill for technical field under the utility model; Make some being equal under the prerequisite of the utility model design and substitute or obviously modification and performance or purposes are identical not breaking away from, all should be regarded as belonging to the scope of patent protection that the utility model is confirmed by claims of being submitted to.
Claims (8)
1. micro projector with reverse function of supplying power is characterized in that:
Be provided with reverse feed circuit, the composition of said reverse feed circuit comprises built-in backup battery, said backup battery step-down is converted into the level shifting circuit of the reverse power supply of direct current, and the output circuit that comprises standard USB interface.
2. the micro projector with reverse function of supplying power as claimed in claim 1 is characterized in that:
Said built-in backup battery is a lithium battery.
3. according to claim 1 or claim 2 the micro projector with reverse function of supplying power is characterized in that:
The charging inlet of said standard USB interface and mobile portable terminal device is compatible.
4. the micro projector with reverse function of supplying power as claimed in claim 3 is characterized in that:
Be connected in series with holding circuit between reverse power supply of said direct current and the said standard USB interface.
5. the micro projector with reverse function of supplying power as claimed in claim 4 is characterized in that:
Said holding circuit is a resettable fuse.
6. the micro projector with reverse function of supplying power as claimed in claim 5 is characterized in that:
Said lithium battery is the lithium battery of 7.4V/1900mA.
7. the micro projector with reverse function of supplying power as claimed in claim 6 is characterized in that:
The reverse power supply of said direct current is the reverse power supply of direct current 5V.
8. the micro projector with reverse function of supplying power as claimed in claim 7 is characterized in that:
Be provided with standard HDMI interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201475790U CN202533696U (en) | 2012-04-10 | 2012-04-10 | Micro projector with reversal power supply function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201475790U CN202533696U (en) | 2012-04-10 | 2012-04-10 | Micro projector with reversal power supply function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202533696U true CN202533696U (en) | 2012-11-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201475790U Expired - Fee Related CN202533696U (en) | 2012-04-10 | 2012-04-10 | Micro projector with reversal power supply function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202533696U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928947A (en) * | 2013-01-10 | 2014-07-16 | 联想(北京)有限公司 | Charge method, apparatus and system of electronic device |
| CN103944218A (en) * | 2014-04-02 | 2014-07-23 | 苏州佳世达电通有限公司 | Charging protection method and display device |
| CN106463097A (en) * | 2014-06-19 | 2017-02-22 | 谷歌公司 | Method for producing a printed circuit board with an embedded sensor chip, and printed circuit board |
| CN107315310A (en) * | 2017-07-04 | 2017-11-03 | 芜湖迈特电子科技有限公司 | Field multifunctional micro projector |
| CN107819335A (en) * | 2016-09-13 | 2018-03-20 | 中兴通讯股份有限公司 | Charge control method, device and terminal |
-
2012
- 2012-04-10 CN CN2012201475790U patent/CN202533696U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103928947A (en) * | 2013-01-10 | 2014-07-16 | 联想(北京)有限公司 | Charge method, apparatus and system of electronic device |
| CN103944218A (en) * | 2014-04-02 | 2014-07-23 | 苏州佳世达电通有限公司 | Charging protection method and display device |
| CN103944218B (en) * | 2014-04-02 | 2016-08-17 | 苏州佳世达电通有限公司 | Charge protection method and display device |
| CN106463097A (en) * | 2014-06-19 | 2017-02-22 | 谷歌公司 | Method for producing a printed circuit board with an embedded sensor chip, and printed circuit board |
| CN107819335A (en) * | 2016-09-13 | 2018-03-20 | 中兴通讯股份有限公司 | Charge control method, device and terminal |
| CN107819335B (en) * | 2016-09-13 | 2021-11-23 | 中兴通讯股份有限公司 | Charging control method and device and terminal |
| CN107315310A (en) * | 2017-07-04 | 2017-11-03 | 芜湖迈特电子科技有限公司 | Field multifunctional micro projector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Shenzhen Yuwei Technology Co. Ltd. Assignor: Zhao Hui Contract record no.: 2013440020127 Denomination of utility model: Micro projector with reversal power supply function Granted publication date: 20121114 License type: Exclusive License Record date: 20130426 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| 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: 20121114 Termination date: 20210410 |