CN201541285U - Switching circuit for phone camera - Google Patents

Switching circuit for phone camera Download PDF

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Publication number
CN201541285U
CN201541285U CN2009201789974U CN200920178997U CN201541285U CN 201541285 U CN201541285 U CN 201541285U CN 2009201789974 U CN2009201789974 U CN 2009201789974U CN 200920178997 U CN200920178997 U CN 200920178997U CN 201541285 U CN201541285 U CN 201541285U
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CN
China
Prior art keywords
camera
clock line
switch
speed analog
analog switch
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.)
Expired - Lifetime
Application number
CN2009201789974U
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Chinese (zh)
Inventor
唐张欢
张翠兰
唐铁
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ZTE Corp
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ZTE Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by ZTE Corp filed Critical ZTE Corp
Priority to CN2009201789974U priority Critical patent/CN201541285U/en
Priority to PCT/CN2010/072644 priority patent/WO2010145355A1/en
Application granted granted Critical
Publication of CN201541285U publication Critical patent/CN201541285U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M2250/00—Details of telephonic subscriber devices
    • H04M2250/52—Details of telephonic subscriber devices including functional features of a camera
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N7/00—Television systems
    • H04N7/14—Systems for two-way working
    • H04N7/141—Systems for two-way working between two video terminals, e.g. videophone
    • H04N7/142—Constructional details of the terminal equipment, e.g. arrangements of the camera and the display
    • H04N2007/145—Handheld terminals

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Image Processing (AREA)
  • Telephone Function (AREA)

Abstract

The utility model provides a switching circuit for phone camera, comprising a primary camera, a secondary camera, an application processing chip and a high-speed analog switch, wherein, the high-speed analog switch receives a control signal from the application processing chip and then guides the primary camera or the secondary camera according to the control signal. a hardware circuit can finish switching, thus improving the switching speed and the stability of the camera and overcoming the problem that in the related technology using software for controlling the switching easily leads to the faults including switching halted or photographing mess and the like, therefore the camera cannot switch or unsteadily work, with low switching reliability, and influence the user experience.

Description

The commutation circuit that is used for mobile phone cam
Technical field
The utility model relates to the communications field, in particular to a kind of commutation circuit that is used for mobile phone cam.
Background technology
The fast development of mobile communication is effectively promoting mobile phone and is developing to intellectuality, miniaturization and high performance direction.
At present, mobile phone has entered the 3G epoch, and the intelligent 3G mobile dominant direction of mobile phone development especially.The 3G smart mobile phone also possesses many additional functions except the function that possesses regular handset, as: functions such as high speed data transfer, web page browsing, GPS (Global Position System, global positioning system), video telephone.The cell-phone visual business is a kind of video communication service of point-to-point, and it relies on the video and the voice signal of 3G network energy real time bidirectional ground transmission both call sides.
In order to realize the cell-phone visual business, need control the camera of mobile phone, generally by the software upper level applications, relevant bsp driver interface is called in response user request, to powering on of responding of camera, initialization, operation such as close.When having a plurality of camera, also the inferior camera of cell-phone visual business and the switching controls between the main camera need realized being used on a mobile phone.
A kind of changing method that is used for mobile phone cam is provided in the correlation technique, this method is passed through User Interface, select to switch the second camera option of first camera in a plurality of cameras, accept user's request, switch to second camera from first camera, the mode of promptly controlling and call the response bottom layer driving by upper layer software (applications) realizes the switching of the different cameras of mobile phone.
The inventor finds to be used in the correlation technique changing method of mobile phone cam by software control, faults such as the deadlock or the Hua Ping that takes pictures appear switching easily, cause camera can't switch or job insecurity, thereby the reliability that causes camera to switch is lower, influences user experience.
The utility model content
The utility model aims to provide a kind of commutation circuit that is used for mobile phone cam, can solve be used for mobile phone cam in the correlation technique changing method by software control, faults such as the deadlock or the Hua Ping that takes pictures appear switching easily, cause camera can't switch or job insecurity, thereby the reliability that causes camera to switch is lower, influences the problem of user experience.
To achieve these goals, according to an aspect of the present utility model, a kind of commutation circuit that is used for mobile phone cam is provided, comprise: high-speed analog switch, main camera, inferior camera and application process chip, wherein, high-speed analog switch receives the control signal of self-application process chip, and according to control signal conducting master's camera or inferior camera.
Preferably, in foregoing circuit, high-speed analog switch comprises: first clock port is electrically connected with the application process chip by first clock line; Switch is selected control port, is electrically connected with the application process chip by using the general input and output of process chip (General Purpose Input/Output is called for short GPIO) port; Switch control unit selects control port to be electrically connected with switch; Single-pole double-throw switch (SPDT) is electrically connected with switch control unit; The second clock port is electrically connected with main camera or inferior camera by the second clock line.
Preferably, in foregoing circuit, use process chip and be electrically connected with high-speed analog switch by using the process chip GPIO port and first clock line.
Preferably, in foregoing circuit, first clock line comprises the first pixel clock line and the first master clock line.
Preferably, in foregoing circuit, main camera is electrically connected with high-speed analog switch by the second clock line.
Preferably, in foregoing circuit, inferior camera is electrically connected with high-speed analog switch by the second clock line.
Preferably, in foregoing circuit, the second clock line comprises the second pixel clock line and the second master clock line.
The foregoing description adopt to be used process chip and is controlled high-speed analog switch and carry out switching between main camera and the inferior camera, promptly adopt hardware circuit to finish switching, crash or faults such as the Hua Ping that takes pictures so overcome in the correlation technique to adopt software to control to switch to occur easily switching, cause camera can't switch or job insecurity, the reliability that camera switches is lower, influence the problem of user experience, thereby improved speed and stability that camera switches.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present utility model, constitutes the application's a part, and illustrative examples of the present utility model and explanation thereof are used to explain the utility model, do not constitute improper qualification of the present utility model.In the accompanying drawings:
Fig. 1 shows the structure chart according to the commutation circuit of the utility model first embodiment;
Fig. 2 shows the structure chart according to the high-speed analog switch of the utility model second embodiment;
Fig. 3 shows the structure chart according to the commutation circuit of the utility model the 3rd embodiment.
Embodiment
Below with reference to the accompanying drawings and in conjunction with the embodiments, describe the utility model in detail.
Fig. 1 shows the structure chart according to the commutation circuit of the utility model first embodiment, this circuit comprises: main camera 1, inferior camera 2, application process chip 3 and high-speed analog switch 4, wherein, high-speed analog switch 4 receives the control signal of using process chip 3, and according to control signal conducting master's camera or inferior camera.
Present embodiment adopt to be used process chip 3 and is controlled high-speed analog switch 4 and carry out switching between main camera 1 and the inferior camera 2, promptly adopt hardware circuit to finish switching, crash or faults such as the Hua Ping that takes pictures so overcome in the correlation technique to adopt software to control to switch to occur easily switching, cause camera can't switch or job insecurity, the reliability that camera switches is lower, influence the problem of user experience, thereby improved speed and stability that camera switches.
Preferably, in foregoing circuit, high-speed analog switch 4 is a Dual Single-Pole Double-Throw High Speed Analog Switch.
Because Dual Single-Pole Double-Throw High Speed Analog Switch has only one tunnel signal communication at synchronization,, thereby improved the reliability that camera switches so present embodiment adopts Dual Single-Pole Double-Throw High Speed Analog Switch to guarantee the uniqueness of switch output signal.
Fig. 2 shows the structure chart according to the high-speed analog switch 4 of the utility model second embodiment, and wherein high-speed analog switch 4 comprises: first clock port is electrically connected with application process chip 3 by first clock line; Switch is selected control port 8, is electrically connected with application process chip 3 by using process chip GPIO port; Switch control unit 9 selects control port 8 to be electrically connected with switch; Single-pole double-throw switch (SPDT) 10 is electrically connected with switch control unit 9; The second clock port is electrically connected with main camera 1 or inferior camera 2 by the second clock line.
High-speed analog switch 4 in the present embodiment is selected control port 8 to receive from switch and is used process chip 3 by using the switch controlling signal (such as the high-low level logical signal) that process chip GPIO port transmission is come, switch control unit 9 changes the conducting direction of single-pole double-throw switch (SPDT) 10 according to this switch controlling signal, the data message that comes self-application process chip 3 that will receive from first clock port outputs to the target camera of switching via the second clock port.Do like this, realized control Dual Single-Pole Double-Throw High Speed Analog Switch 4 by hardware circuit, simple, and also reliability is higher.
Fig. 3 shows the structure chart according to the commutation circuit of the utility model the 3rd embodiment, and application process chip 3 wherein is electrically connected with high-speed analog switch 4 by the application process chip GPIO port 5 and first clock line.
The electrical connecting passage of using between process chip 3 and the high-speed analog switch 4 in the present embodiment comprises: use the process chip GPIO port 5 and first clock line.The signal of wherein using 5 outputs of process chip GPIO port is for using the switch controlling signal that is used to control high-speed analog switch 4 of process chip 3 outputs, such as output logic level (on behalf of high level, " 0 ", " 1 " represent low level), by the variation of GPIO port 5 level, control the switching of high-speed analog switch 4.Adopt the high-low level of GPIO port output to control high-speed analog switch 4, simple, and failure rate is low.
Preferably, in foregoing circuit, as Fig. 2 and shown in Figure 3, first clock line comprises the first pixel clock line 6 and the first master clock line 7.
Be used to use first clock line that is electrically connected between process chip 3 and the high-speed analog switch 4 in the present embodiment and comprise the first pixel clock line 6 and the first master clock line 7, wherein the first pixel clock line 6 is used for transmitting Pixel Information using between process chip 3 and the high-speed analog switch 4, the first master clock line 7 be used for and high-speed analog switch 4 between transfer clock information.Do like this, improved information transmission efficiency.
Preferably, in foregoing circuit, main camera 1 is electrically connected with high-speed analog switch 4 by the second clock line.
Second clock line in the present embodiment is the passage of data message between high-speed analog switch 4 and the main camera 1.Do like this, realized that relevant data message is transmission reliably between high-speed analog switch 4 and main camera 1 when high-speed analog switch 4 selections are communicated with main camera 1.
Preferably, in foregoing circuit, inferior camera 2 is electrically connected with high-speed analog switch 4 by the second clock line.
Second clock line in the present embodiment is the passage of data message between high-speed analog switch 4 and the main camera 1.Do like this, realized that relevant data message is transmission reliably between high-speed analog switch 4 and main camera 1 when high-speed analog switch 4 selections are communicated with main camera 1.
Preferably, in foregoing circuit, as Fig. 2 and shown in Figure 3, the second clock line comprises the second pixel clock line 12 and the second master clock line 11.
The second clock line that is used in the present embodiment being electrically connected between high-speed analog switch 4 and the camera 1,2 comprises the second pixel clock line 12 and the second master clock line 11, wherein the second pixel clock line 12 is used for the Pixel Information between transmitting high speed analog switch 4 and the camera 1,2, and the second master clock line 11 is used for 4 pairs of cameras of high-speed analog switch 1,2 and controls.Do like this, improved information transmission efficiency.
Main camera 1 in the present embodiment and time camera 2 are two modules independently, all drive by using process chip 3, comprise the two-way clock signal promptly: pixel clock signal 6,12 and master clock signal 7,11, the two-way clock signal provides clock for jointly two cameras 1,2, realize switching between two cameras 1,2 by high-speed analog switch 4, finishing the final output of two-way clock is main camera 1 or inferior camera 2.
When switching to time camera 2 during from main camera 1 when needs, at first main camera 1 is in running order, high-speed analog switch 4 selections were in and selected conducting master camera clock output (being the two paths of signals that is positioned at high-speed analog switch 4 upper ends among Fig. 3) this moment, after inferior camera 2 is activated, use process chip 3 by changing the output level of using process chip GPIO port 5, come to select control port 8 and switch control unit 9 to change single-pole double-throw switch (SPDT) 10 and switch to time camera output (being the two paths of signals that is positioned at high-speed analog switch 4 left sides among Fig. 3) by switch.
When switching to main camera 1 when need be and above-mentioned similar to the switching of inferior camera 2 by main camera 1 from inferior camera 2.
Utilize foregoing circuit to realize that the embodiment that controls the switching of primary and secondary camera may further comprise the steps:
Steps A. camera need switch, and is such as switched to time camera 2 by main camera 1, perhaps opposite;
Step B. uses the high-low level of process chip 3 according to 5 its outputs of conversion of camera switching command control application process chip control GPIO port;
Step C. controls Dual Single-Pole Double-Throw High Speed Analog Switch 4 and switches according to the variation of GPIO port 5 output levels;
Step D. switches the conducting direction of Dual Single-Pole Double-Throw High Speed Analog Switch 4, so that pixel clock and master clock signal export the target camera to;
Step e. finally finish camera and switch target camera operate as normal.
Present embodiment is finished switch operating between the primary and secondary camera with the design of hardware circuit, realized more stable and switching efficiently between main camera work and time camera, guarantee mobile phone can be in all cases freely camera is carried out switching controls, stopped the phenomenon of the camera unstable working condition that causes owing to software control.
As can be seen from the above description, the utility model the above embodiments adopt hardware circuit to finish switching, thereby have improved speed and stability that camera switches.
Obviously, those skilled in the art should be understood that, above-mentioned each module of the present utility model or each step can realize with the general calculation device, they can concentrate on the single calculation element, perhaps be distributed on the network that a plurality of calculation element forms, alternatively, they can be realized with the executable program code of calculation element, thereby, they can be stored in the storage device and carry out by calculation element, perhaps they are made into each integrated circuit modules respectively, perhaps a plurality of modules in them or step are made into the single integrated circuit module and realize.Like this, the utility model is not restricted to any specific hardware and software combination.
The above is a preferred embodiment of the present utility model only, is not limited to the utility model, and for a person skilled in the art, the utility model can have various changes and variation.All within spirit of the present utility model and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within the protection range of the present utility model.

Claims (7)

1. commutation circuit that is used for mobile phone cam, it is characterized in that, comprise: high-speed analog switch, main camera, inferior camera and application processor chip, wherein, described high-speed analog switch receives the control signal from described application process chip, and according to the described main camera of described control signal conducting or described camera.
2. circuit according to claim 1 is characterized in that, described high-speed analog switch comprises:
First clock port is electrically connected with described application process chip by first clock line;
Switch is selected control port, is electrically connected with described application process chip by using the process chip universal input and output port;
Switch control unit selects control port to be electrically connected with described switch;
Single-pole double-throw switch (SPDT) is electrically connected with described switch control unit;
The second clock port is electrically connected with described main camera or described camera by the second clock line.
3. circuit according to claim 2 is characterized in that, described application process chip is electrically connected with described high-speed analog switch by using process chip universal input and output port and described first clock line.
4. according to claim 2 or 3 described circuit, it is characterized in that described first clock line comprises the first pixel clock line and the first master clock line.
5. circuit according to claim 2 is characterized in that, described main camera is electrically connected with described high-speed analog switch by described second clock line.
6. circuit according to claim 2 is characterized in that, described time camera is electrically connected with described high-speed analog switch by described second clock line.
7. according to claim 2,5 or 6 described circuit, it is characterized in that described second clock line comprises the second pixel clock line and the second master clock line.
CN2009201789974U 2009-10-19 2009-10-19 Switching circuit for phone camera Expired - Lifetime CN201541285U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2009201789974U CN201541285U (en) 2009-10-19 2009-10-19 Switching circuit for phone camera
PCT/CN2010/072644 WO2010145355A1 (en) 2009-10-19 2010-05-11 Circuit for switching mobile phone cameras

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009201789974U CN201541285U (en) 2009-10-19 2009-10-19 Switching circuit for phone camera

Publications (1)

Publication Number Publication Date
CN201541285U true CN201541285U (en) 2010-08-04

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WO (1) WO2010145355A1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088643A1 (en) * 2010-01-22 2011-07-28 中兴通讯股份有限公司 Control method and apparatus for master-slave mode dual cameras of wireless terminal
CN102263904A (en) * 2011-08-17 2011-11-30 华为终端有限公司 Method and system for controlling double cameras and electronic equipment with double cameras
CN102480592A (en) * 2010-11-30 2012-05-30 比亚迪股份有限公司 Double-camera control circuit and double-camera mobile terminal
CN102685306A (en) * 2011-03-15 2012-09-19 联想(北京)有限公司 Method and mobile terminal for switching image collecting units
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
CN109995989A (en) * 2017-12-30 2019-07-09 陈啸 A kind of camera shooting head control circuit
CN111586291A (en) * 2020-04-22 2020-08-25 深圳市瀚邦为电子材料有限公司 Lifting camera system, camera equipment, camera lifting method and device

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CN103970472A (en) 2013-01-25 2014-08-06 宏达国际电子股份有限公司 Electronic Device And Camera Switching Method Thereof
CN205883377U (en) * 2015-01-24 2017-01-11 深圳市鑫龙上通讯科技有限公司 Anti -jamming cell -phone camera and cell -phone

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CN201084239Y (en) * 2007-04-25 2008-07-09 万成 A visual anti-theft alarm
CN101291379A (en) * 2008-06-05 2008-10-22 中兴通讯股份有限公司 Mobile terminal and picture-phone implementing method thereof
CN101299847B (en) * 2008-06-25 2013-04-10 闻泰通讯股份有限公司 Method for setting, controlling and switching forward and backward CCD camera of mobile terminal

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011088643A1 (en) * 2010-01-22 2011-07-28 中兴通讯股份有限公司 Control method and apparatus for master-slave mode dual cameras of wireless terminal
CN102480592A (en) * 2010-11-30 2012-05-30 比亚迪股份有限公司 Double-camera control circuit and double-camera mobile terminal
CN102685306A (en) * 2011-03-15 2012-09-19 联想(北京)有限公司 Method and mobile terminal for switching image collecting units
CN102685306B (en) * 2011-03-15 2014-06-04 联想(北京)有限公司 Method and mobile terminal for switching image collecting units
CN102263904A (en) * 2011-08-17 2011-11-30 华为终端有限公司 Method and system for controlling double cameras and electronic equipment with double cameras
CN109995989A (en) * 2017-12-30 2019-07-09 陈啸 A kind of camera shooting head control circuit
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
CN111586291A (en) * 2020-04-22 2020-08-25 深圳市瀚邦为电子材料有限公司 Lifting camera system, camera equipment, camera lifting method and device

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Granted publication date: 20100804