CN102480592A - Double-camera control circuit and double-camera mobile terminal - Google Patents
Double-camera control circuit and double-camera mobile terminal Download PDFInfo
- Publication number
- CN102480592A CN102480592A CN2010105643004A CN201010564300A CN102480592A CN 102480592 A CN102480592 A CN 102480592A CN 2010105643004 A CN2010105643004 A CN 2010105643004A CN 201010564300 A CN201010564300 A CN 201010564300A CN 102480592 A CN102480592 A CN 102480592A
- Authority
- CN
- China
- Prior art keywords
- camera
- bbp
- clock signal
- control circuit
- master clock
- Prior art date
- 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.)
- Pending
Links
Images
Landscapes
- Studio Devices (AREA)
Abstract
The invention provides a double-camera control circuit and a double-camera mobile terminal, belonging to the technical field of portable communication equipment. Clock switches are additionally arranged on a baseband processor of a regular circuit and main clock signal lines of a primary camera and a secondary camera of the double-camera control circuit and are used for controlling switching-on/off of main clock signals among the primary camera and the secondary camera, and the baseband processor. According to the invention, one clock switch is additionally arranged in the double-camera control circuit and is used for controlling to select one of the main clock signal line of the primary camera and the main clock signal line of the secondary camera to be conducted. The double-camera control circuit and the double-camera mobile terminal provided by the invention solve the problems that the disabler or abnormal application of the camera at the working state is caused by electric leakage or leading-in of noises of the clock signal line corresponding to the camera at the idle state.
Description
Technical field
The invention belongs to the portable communication electronic device field, relate in particular to a kind of dual camera control circuit and dual camera portable terminal.
Background technology
Two camera shared data holding wires, clock cable, synchronous signal line and I2C buses of traditional dual camera control circuit.In order to prevent electrostatic interference; Traditional dual camera mobile terminal design scheme is at BBP and main camera and VGA (Video Graphics Array; Video Graphics Array) an EMI (Electromagnetic Interference is set on the data signal line between the camera, master clock signal line, pixel clock signal line, frame synchronizing signal line and the line synchronizing signal line; Electromagnetic interference) filter; Be used to eliminate the electromagnetic interference on data signal line, clock cable and the synchronous signal line, to strengthen anti-static ability.
But inventor of the present invention technique scheme is studied with practice process in find: the data wire of two cameras, master clock signal line, pixel clock signal line, frame synchronizing signal line, line synchronizing signal line and BBP all are in connected state.Like this when portable terminal uses main camera or secondary camera, the electric leakage or the introducing meeting of noise that wherein are on the corresponding clock cable of the camera of idle condition cause disabler or use unusual in running order camera.Therefore, though be provided with electromagnetic interface filter in the above-mentioned dual camera control circuit, performance significantly do not promoted, and increased design cost.
Summary of the invention
For addressing the above problem, the invention provides a kind of dual camera control circuit and dual camera portable terminal, one of them camera is in idle camera and can the camera that be in application state not be impacted when using.
A kind of dual camera control circuit comprises: BBP, main camera, secondary camera, linear voltage regulator; Said BBP is connected with secondary camera with main camera respectively and controls main camera and secondary camera; Said linear voltage regulator one end is connected with external power source, and the other end of linear voltage regulator is connected with main camera and secondary camera respectively, controls said linear voltage regulator by said BBP and supplies power for main camera and secondary camera;
Said control circuit also comprises: clock switch; Said clock switch is connected on the master clock signal line of BBP and main camera and secondary camera, is used to control the master clock signal line of said main camera and the master clock signal line of secondary camera is selected a conducting.
The present invention also provides a kind of dual camera portable terminal, comprises above-mentioned dual camera control circuit.
The present invention is provided with clock switch in the dual camera control circuit; Control the break-make of the master clock signal between main camera and secondary camera and the BBP through said clock switch; When promptly main camera is connected with the master clock signal line of BBP, breaks off secondary camera and be connected with the master clock signal line of BBP; When secondary camera is connected with the master clock signal line of BBP, breaks off main camera and be connected with the master clock signal line of BBP; When one of them camera is being used; Be in idle camera and can the camera that be in application state do not impacted, thereby the electric leakage or the introducing of noise that have solved on the corresponding clock cable of the camera that is in idle condition cause disabler or use unusual problem in running order camera.
Description of drawings
Fig. 1 is the dual camera control circuit sketch map that the embodiment of the invention provides.
Fig. 2 is that the dual camera control circuit signal that the embodiment of the invention provides connects sketch map.
Fig. 3 is the clock switch circuit figure that the embodiment of the invention provides.
Embodiment
Clearer for technical problem, technical scheme and beneficial effect that the present invention is solved, below in conjunction with accompanying drawing and embodiment, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explanation the present invention, and be not used in qualification the present invention.
As shown in Figure 1, dual camera control circuit of the present invention comprises: BBP 1, main camera 2, secondary camera 3, linear voltage regulator 4, clock switch 5; Said BBP 1 is connected with secondary camera 3 with main camera 2 respectively and controls main camera 2 and secondary camera 3; Said linear voltage regulator 4 one ends are connected with external power source 6; The other end is connected with main camera 2 and secondary camera 3 respectively, supplies power for main camera 2 with secondary camera 3 by the said linear voltage regulator 4 of said BBP 1 control.
Said control circuit also comprises: clock switch 5; Said clock switch 5 is connected on the master clock signal line of BBP 1 and main camera 2 and secondary camera 3, is used to control the master clock signal line of said main camera 2 and the master clock signal line of secondary camera 3 is selected a conducting.
As shown in Figure 2, the dual camera control circuit signal that provides for the embodiment of the invention connects sketch map; BBP 21 is connected with data-signal DATA, pixel clock PCLK, frame synchronizing signal VSYNC, line synchronizing signal HSYNC, the I2C bus signals of secondary camera 23 (can be the VGA camera) with main shooting 22 respectively; In addition, BBP 21 also is connected with reset signal RESET, the chip selection signal PWDN of main camera 22 separately, and BBP 21 is connected with the chip selection signal PWDN of secondary camera 23 separately.
When the control signal SWITCH of BBP is logic high; The first input end HSD1+ of first single-pole double-throw switch (SPDT) is connected with the first output D+; The first input end HSD1-of second single-pole double-throw switch (SPDT) is connected with the first output D-; Thereby realize that BBP control clock switch is communicated with the purpose of main camera master clock signal line ground connection with BBP with master clock signal line between the secondary camera.
When the control signal SWTCH of BBP is logic low; The second input HSD2+ of first single-pole double-throw switch (SPDT) is connected with the first output D+; The second input HSD2-of second single-pole double-throw switch (SPDT) is connected with the first output D-; Thereby realize that BBP control clock switch is communicated with the purpose of secondary camera master clock signal line ground connection with BBP with master clock signal line between the main camera.
When using secondary camera, BBP control signal SWITCH is set to logic high, and BBP is communicated with main camera master clock signal line ground connection with master clock signal line between the secondary camera.When using main camera, BBP control signal SWITCH is set to logic low, and BBP is communicated with secondary camera master clock signal line ground connection with master clock signal line between the main camera.Less than the electric leakage on the clock cable that disturbs, eliminated the camera correspondence that is in idle condition or the introducing of noise in running order camera is caused disabler or uses unusual problem between the master clock signal of two cameras.
As shown in Figure 2; LDO (Low Dropout Regulator; Linear voltage regulator) 24 the voltage signal of external power source 26 changed, convert analog part power supply signal AVDD, core numeral power supply signal VDD, the digital interface power supply signal DOVDD of main camera 22 respectively into.Linear voltage regulator 24 is changed the voltage signal of external power source 26, converts analog part power supply signal AVDD, the digital interface power supply signal DOVDD of secondary camera 23 respectively into.The work of linear voltage regulator 24 receives the control of BBP 21; When needs use main camera 22; BBP 21 control linear voltage regulators 24 convert external voltage signal analog part power supply signal AVDD, core numeral power supply signal VDD, the digital interface power supply signal DOVDD of main camera 22 into, do not give secondary camera 23 power supplies this moment.When needs used secondary camera 23, BBP 21 control linear voltage regulators 24 converted external voltage signal analog part power supply signal AVDD, the digital interface power supply signal DOVDD of secondary camera 23 into, do not give main camera 22 power supplies this moment.
Said BBP 21 comprises GPIO (General Purpose Input Output; General input and output) interface 27, and BBP 21 is connected with clock switch 25, linear voltage regulator 24, main camera 22 and secondary camera 23 through universal input/output interface 27.In addition, this universal input/output interface 27 can also be used for the bus expansion.
In addition; The present invention also provides a kind of dual camera portable terminal; Said dual camera portable terminal comprises above-mentioned dual camera control circuit, and the electric leakage or the introducing of noise that have solved on the corresponding clock cable of the camera that is in idle condition cause disabler or use unusual problem in running order camera.
The above is merely preferred embodiment of the present invention, not in order to restriction the present invention, all any modifications of within spirit of the present invention and principle, being done, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.
Claims (9)
1. a dual camera control circuit comprises: BBP, main camera, secondary camera, linear voltage regulator; Said BBP is connected with secondary camera with main camera respectively and controls main camera and secondary camera; Said linear voltage regulator one end is connected with external power source, and the other end of linear voltage regulator is connected with main camera and secondary camera respectively, controls said linear voltage regulator by said BBP and supplies power for main camera and secondary camera;
It is characterized in that; Said control circuit also comprises: clock switch; Said clock switch is connected on the master clock signal line of BBP and main camera and secondary camera, is used to control the master clock signal line of said main camera and the master clock signal line of secondary camera is selected a conducting.
2. dual camera control circuit as claimed in claim 1; It is characterized in that said clock switch comprises: be connected first single-pole double-throw switch (SPDT) on the master clock signal line of BBP and secondary camera, be connected second single-pole double-throw switch (SPDT) on the master clock signal line of BBP and main camera; The said first single-pole double-throw switch (SPDT) first input end connects BBP master clock signal end, second input end grounding, the master clock signal end of the first output auxiliary connection camera; Said second single-pole double-throw switch (SPDT), second input connects BBP master clock signal end, first input end ground connection, and first output connects the master clock signal end of main camera; Said clock switch also comprises control terminal, is electrically connected with BBP, is used to control the work of first single-pole double-throw switch (SPDT) and second single-pole double-throw switch (SPDT).
3. dual camera control circuit as claimed in claim 2 is characterized in that, said BBP control clock switch is communicated with secondary camera master clock signal line ground connection with BBP with master clock signal line between the main camera.
4. dual camera control circuit as claimed in claim 2 is characterized in that, said BBP control clock switch is communicated with main camera master clock signal line ground connection with BBP with master clock signal line between the secondary camera.
5. dual camera control circuit as claimed in claim 1; It is characterized in that; Said linear voltage regulator is changed external voltage signal, converts analog part power supply signal, core numeral power supply signal, the digital interface power supply signal of main camera respectively into.
6. dual camera control circuit as claimed in claim 1 is characterized in that said linear voltage regulator is changed external voltage signal, converts analog part power supply signal, the digital interface power supply signal of secondary camera respectively into.
7. dual camera control circuit as claimed in claim 1; It is characterized in that; Said BBP comprises universal input/output interface, and said BBP is connected with clock switch, linear voltage regulator, main camera and secondary camera through universal input/output interface.
8. dual camera control circuit as claimed in claim 1 is characterized in that, said universal input/output interface also is used for the bus expansion.
9. a dual camera portable terminal is characterized in that, said dual camera portable terminal comprises like each described dual camera control circuit of claim 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105643004A CN102480592A (en) | 2010-11-30 | 2010-11-30 | Double-camera control circuit and double-camera mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105643004A CN102480592A (en) | 2010-11-30 | 2010-11-30 | Double-camera control circuit and double-camera mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102480592A true CN102480592A (en) | 2012-05-30 |
Family
ID=46093060
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105643004A Pending CN102480592A (en) | 2010-11-30 | 2010-11-30 | Double-camera control circuit and double-camera mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102480592A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486465A (en) * | 2014-12-08 | 2015-04-01 | 上海斐讯数据通信技术有限公司 | Mobile terminal |
| CN106612377A (en) * | 2017-01-12 | 2017-05-03 | 维沃移动通信有限公司 | Circuit for controlling dual cameras, mobile terminal, and method for controlling dual cameras |
| CN107613169A (en) * | 2017-09-26 | 2018-01-19 | 天津光电通信技术有限公司 | A kind of dual camera system based on ARM chips |
| CN108848220A (en) * | 2018-06-29 | 2018-11-20 | 努比亚技术有限公司 | A kind of camera clock circuit and mobile terminal |
| CN109361414A (en) * | 2018-10-31 | 2019-02-19 | Oppo（重庆）智能科技有限公司 | A kind of Communication Jamming improves circuit and wireless telecom equipment |
| CN109995989A (en) * | 2017-12-30 | 2019-07-09 | 陈啸 | A kind of camera shooting head control circuit |
| WO2019205045A1 (en) * | 2018-04-26 | 2019-10-31 | 华为技术有限公司 | Signal switching method and terminal |
| CN112019764A (en) * | 2019-05-29 | 2020-12-01 | 北京地平线机器人技术研发有限公司 | Image pickup apparatus and image pickup system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299847A (en) * | 2008-06-25 | 2008-11-05 | 嘉兴闻泰通讯科技有限公司 | Method for setting, controlling and switching forward and backward CCD camera of mobile terminal |
| CN201307911Y (en) * | 2008-09-22 | 2009-09-09 | 宇龙计算机通信科技(深圳)有限公司 | A multi-camera circuit and a mobile terminal |
| CN201541285U (en) * | 2009-10-19 | 2010-08-04 | 中兴通讯股份有限公司 | Switching circuit for phone camera |
-
2010
- 2010-11-30 CN CN2010105643004A patent/CN102480592A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101299847A (en) * | 2008-06-25 | 2008-11-05 | 嘉兴闻泰通讯科技有限公司 | Method for setting, controlling and switching forward and backward CCD camera of mobile terminal |
| CN201307911Y (en) * | 2008-09-22 | 2009-09-09 | 宇龙计算机通信科技(深圳)有限公司 | A multi-camera circuit and a mobile terminal |
| CN201541285U (en) * | 2009-10-19 | 2010-08-04 | 中兴通讯股份有限公司 | Switching circuit for phone camera |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486465A (en) * | 2014-12-08 | 2015-04-01 | 上海斐讯数据通信技术有限公司 | Mobile terminal |
| CN106612377A (en) * | 2017-01-12 | 2017-05-03 | 维沃移动通信有限公司 | Circuit for controlling dual cameras, mobile terminal, and method for controlling dual cameras |
| CN106612377B (en) * | 2017-01-12 | 2019-09-27 | 维沃移动通信有限公司 | A kind of circuit, mobile terminal and method controlling dual camera |
| CN107613169A (en) * | 2017-09-26 | 2018-01-19 | 天津光电通信技术有限公司 | A kind of dual camera system based on ARM chips |
| CN109995989A (en) * | 2017-12-30 | 2019-07-09 | 陈啸 | A kind of camera shooting head control circuit |
| WO2019205045A1 (en) * | 2018-04-26 | 2019-10-31 | 华为技术有限公司 | Signal switching method and terminal |
| CN110832841A (en) * | 2018-04-26 | 2020-02-21 | 华为技术有限公司 | Signal switching method and terminal |
| CN108848220A (en) * | 2018-06-29 | 2018-11-20 | 努比亚技术有限公司 | A kind of camera clock circuit and mobile terminal |
| CN109361414A (en) * | 2018-10-31 | 2019-02-19 | Oppo（重庆）智能科技有限公司 | A kind of Communication Jamming improves circuit and wireless telecom equipment |
| CN112019764A (en) * | 2019-05-29 | 2020-12-01 | 北京地平线机器人技术研发有限公司 | Image pickup apparatus and image pickup system |
| CN112019764B (en) * | 2019-05-29 | 2022-01-14 | 北京地平线机器人技术研发有限公司 | Image pickup apparatus and image pickup system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102480592A (en) | Double-camera control circuit and double-camera mobile terminal | |
| US10698444B2 (en) | Docking station having adapter function and end-user device accessory | |
| US10572429B2 (en) | Port extension apparatus | |
| EP3098931B1 (en) | Charging circuit and terminal | |
| CN105071795A (en) | Multiplex circuit based on USB interface | |
| EP2546724B1 (en) | Device and method for charging a master device using a detachable device | |
| CN202364377U (en) | Parts detecting system | |
| CN111149298A (en) | Protection circuit for decoupling low-voltage circuitry from high-voltage circuitry | |
| CN103680750A (en) | MHL cable and electronic device | |
| CN218123908U (en) | Docking station | |
| CN201075214Y (en) | USB general-purpose data line | |
| CN102759978A (en) | Circuit for display equipment and power supply method | |
| US20150185817A1 (en) | Charging circuit for usb interface | |
| CN202616544U (en) | Terminal PC (personal computer) multifunctional lightning protection socket | |
| US20180224972A1 (en) | Touch System and Power Supply Circuit thereof | |
| KR101236299B1 (en) | A usb hub and hdmi adapter | |
| CN112787372B (en) | Charging equipment and charging system | |
| CN204946892U (en) | There is the integrated circuit of electrostatic discharge protective | |
| CN211089788U (en) | Vehicle machine video signal conversion device | |
| CN108200310A (en) | A kind of circuit module for improving all-in-one machine vision signal antijamming capability | |
| US20180241962A1 (en) | Television main board apparatus, television and television system | |
| CN210246371U (en) | Multi-source multi-port output circuit | |
| CN107256687B (en) | Electrostatic protection circuit, driving method, electrostatic protection module and display device | |
| CN109995989A (en) | A kind of camera shooting head control circuit | |
| CN203416349U (en) | Switching device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120530 |