CN208890906U - A kind of mobile phone imaging circuit mould group - Google Patents
A kind of mobile phone imaging circuit mould group Download PDFInfo
- Publication number
- CN208890906U CN208890906U CN201821511644.7U CN201821511644U CN208890906U CN 208890906 U CN208890906 U CN 208890906U CN 201821511644 U CN201821511644 U CN 201821511644U CN 208890906 U CN208890906 U CN 208890906U
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- mobile phone
- flash lamp
- circuit
- mould group
- phototriode
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Abstract
A kind of mobile phone imaging circuit mould group, including flash lamp and its driving circuit, it further include feedback module, the feedback module includes the phototriode being arranged near flash lamp, the phototriode and current-limiting resistance are connected between working power and ground, the phototriode connects booster circuit enable end, driving power of the output voltage of the booster circuit as flash lamp with the common end of current-limiting resistance.Using mobile phone described in the utility model imaging circuit mould group, the power on/off of control flash lamp is incuded using light-sensitive device, is overcome the defect of software control erroneous judgement, is improved flash lamp using effect.
Description
Technical field
The utility model belongs to electronic circuit field, is related to mobile phone module circuit, and in particular to a kind of mobile phone camera shooting electricity
Road mould group.
Background technique
Existing majority mobile phone has digital camera functionality, and the digital camera functionality of mobile phone refers to whether mobile phone can pass through
Built-in or external digital camera carries out shooting static images or short-movie shooting, as a new additional function of mobile phone,
The digital camera functionality of mobile phone is rapidly developed.Such as many mobile phone flash lamp functions, flash lamp are usually benefit
With the light-emitting LED high current led in 100-400 milliamperes of ranges within a short period of time, LED issues short time strong light and realizes flash of light effect
Fruit is usually in the prior art that software is utilized directly to operate for the control of flash lamp, the programming operations physical presence of software
Flash lamp is since hardware or software error causes flash of light can not achieve, or takes for flash of light and have been carried out and break in advance to flash lamp
Electricity causes to glisten or flash effect is poor.
Utility model content
To overcome defect existing for existing mobile phone flashlight control technology, the utility model discloses a kind of camera shootings of mobile phone
Circuit module.
Mobile phone described in the utility model imaging circuit mould group, including flash lamp and its driving circuit further include feedback mould
Block, the feedback module include the phototriode being arranged near flash lamp, the phototriode and current-limiting resistance series connection
Between working power and ground, the phototriode connects booster circuit enable end, the liter with the common end of current-limiting resistance
Driving power of the output voltage of volt circuit as flash lamp.
Preferably, the booster circuit is charge pump circuit.
Preferably, the phototriode connects booster circuit by delay trigger circuit with the common end of current-limiting resistance and makes
It can end.
Preferably, the phototriode is wrapped with filter coating.
Preferably, the driving circuit includes operational amplifier, adjustment pipe, feedback resistance；The operational amplifier is positive
One reference power supply of end connection, backward end connection adjustment pipe output end, operational amplifier output terminal connection adjustment pipe control terminal are described
Feedback resistance is connected between adjustment pipe output end and ground, and the flash lamp is LED pipe, is connected on adjustment pipe and feedback resistance
Between driving power and ground.
Further, the adjustment pipe is NPN triode.
Using mobile phone described in the utility model imaging circuit mould group, the on-off of control flash lamp is incuded using light-sensitive device
Electricity overcomes the defect of software control erroneous judgement, improves flash lamp using effect.
Detailed description of the invention
Fig. 1 is a kind of specific embodiment schematic diagram of mobile phone imaging circuit mould group described in the utility model, attached in figure
Icon is signed referred to as: AMP- operational amplifier, VREF- reference voltage source, VH- driving power, VCC- working power, T1- adjustment
Pipe, T2- phototriode, D- light emitting diode, R1- feedback resistance, R2- current-limiting resistance, DL- delay trigger circuit, CB- charge
Pump, C- capacitor, in- input terminal, out- output end, the enable end en-.
Specific embodiment
With reference to the accompanying drawing, specific embodiment of the present utility model is described in further detail.
Mobile phone described in the utility model imaging circuit mould group, including flash lamp and its driving circuit further include feedback mould
Block, the feedback module include the phototriode T2 being arranged near flash lamp, the phototriode and current-limiting resistance string
It is associated between working power VCC and ground, the phototriode connects booster circuit enable end, institute with the common end of current-limiting resistance
State driving power VH of the output voltage as flash lamp of booster circuit.
In specific embodiment as shown in Figure 1, the booster circuit is preferably charge pump circuit CB, such as ICL7660
It is larger not to need volume for equal High-current outputs charge pump, opposite other inductive types such as BOOST, the booster circuits such as BUCK-BOOST
Inductance, be conducive to integrated, and ripple caused by inductance repeated charge will not be generated, interference handset communication quality;Boosting electricity
The output end on road generally connects a capacitor C to ground.
It shines after booster circuit boosting from output end outputting drive voltage VH driving light emitting diode D, light emitting diode can
To be multiple series diodes, for electric current by flashlight driving circuit adjusting, driving circuit as shown in Figure 1 includes operation amplifier
Device AMP adjusts pipe T1, feedback resistance R1；The operational amplifier forward end connects a reference power supply, backward end connection adjustment pipe
Output end, operational amplifier output terminal connection adjustment pipe control terminal, the feedback resistance are connected to adjustment pipe output end and ground
Between, the flash lamp is LED pipe, is connected between driving power and ground with adjustment pipe and feedback resistance.
Feedback resistance R1 keeps operational amplifier both end voltage equal, that is, flow through the reference voltages such as the electric current of feedback resistance divided by
The stable constant current of electric current for flowing through light emitting diode can be realized by the adjusting of reference voltage for the resistance value of feedback resistance.Adjustment pipe
It is general to use the NPN triode that power is big, reaction speed is fast.
The starting of flash lamp is still controlled using extraneous control signal in the utility model, such as mobile phone software control liter
Volt circuit starting, it is however generally that, after user opens flash function, flash function at least just can be really used at 1 second or so, boosted
The boosting of circuit generally only needs several milliseconds, enough completion boost operations, and user's selection is taken pictures, and driving circuit is started to work,
In specific embodiment shown in Fig. 1, operational amplifier can be made to start to work, after lumination of light emitting diode, photosensitive three pole
After pipe senses luminous conducting, booster circuit enable end can be just pulled down, booster circuit is made no longer to work；If not sensing hair
Light then continues starting booster circuit, until flash of light is completed;The effect of current-limiting resistance R2 is limitation pull-down current.
For the sensitivity for reducing phototriode, photomask can be wrapped up outside phototriode or uses other optical filters
Deng the induction threshold value of light-inductive can be increased to meet brightness of flash lamp requirement.
It, can be in the common end of the phototriode and current-limiting resistance by prolonging in specific embodiment shown in FIG. 1
When trigger circuit connect booster circuit enable end, the closing of delays time to control booster circuit, be appropriately extended flash time, Time-delayed trigger
Circuit can be the analog delay circuit of capacitance resistance device composition, is also possible to digital time delayer such as SD2058 etc. and has delay
The clock chip of clocking capability.
Using mobile phone described in the utility model imaging circuit mould group, the on-off of control flash lamp is incuded using light-sensitive device
Electricity overcomes the defect of software control erroneous judgement, improves flash lamp using effect.
Previously described each preferred embodiment for the utility model, the preferred embodiment in each preferred embodiment
If not obvious contradictory or premised on a certain preferred embodiment, each preferred embodiment can be arbitrarily superimposed
It is applied in combination, the design parameter in the embodiment and embodiment is merely to clearly state the utility model of utility model people
Verification process, not to limit the scope of patent protection of the utility model, the scope of patent protection of the utility model still with
Subject to its claims, the variation of equivalent structure made by all specifications and accompanying drawing content with the utility model, similarly
It should be included in the protection scope of the utility model.
Claims (6)
1. a kind of mobile phone imaging circuit mould group, including flash lamp and its driving circuit, it is characterised in that, it further include feedback mould
Block, the feedback module include the phototriode being arranged near flash lamp, the phototriode and current-limiting resistance series connection
Between working power and ground, the phototriode connects booster circuit enable end, the liter with the common end of current-limiting resistance
Driving power of the output voltage of volt circuit as flash lamp.
2. mobile phone as described in claim 1 imaging circuit mould group, which is characterized in that the booster circuit is charge pump electricity
Road.
3. mobile phone as described in claim 1 imaging circuit mould group, which is characterized in that the phototriode and current-limiting resistance
Common end pass through delay trigger circuit connect booster circuit enable end.
4. mobile phone as described in claim 1 imaging circuit mould group, which is characterized in that the phototriode is wrapped with filter
Light film.
5. mobile phone as described in claim 1 imaging circuit mould group, which is characterized in that the driving circuit includes operation amplifier
Device, adjustment pipe, feedback resistance；The operational amplifier forward end connects a reference power supply, and backward end connection adjusts pipe output end,
Operational amplifier output terminal connection adjustment pipe control terminal, the feedback resistance is connected between adjustment pipe output end and ground, described
Flash lamp is LED pipe, is connected between driving power and ground with adjustment pipe and feedback resistance.
6. mobile phone as claimed in claim 5 imaging circuit mould group, which is characterized in that the adjustment pipe is NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821511644.7U CN208890906U (en) | 2018-09-17 | 2018-09-17 | A kind of mobile phone imaging circuit mould group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821511644.7U CN208890906U (en) | 2018-09-17 | 2018-09-17 | A kind of mobile phone imaging circuit mould group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208890906U true CN208890906U (en) | 2019-05-21 |
Family
ID=66512511
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821511644.7U Active CN208890906U (en) | 2018-09-17 | 2018-09-17 | A kind of mobile phone imaging circuit mould group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208890906U (en) |
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2018
- 2018-09-17 CN CN201821511644.7U patent/CN208890906U/en active Active
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 643000 Yuchuan Road, Yantan District Industrial Park, Zigong City, Sichuan Province (Dormitory B) Patentee after: Zigong Beyond Science and Technology Group Co., Ltd. Address before: 643000 Yuchuan Road, Yantan District Industrial Park, Zigong City, Sichuan Province (Dormitory B) Patentee before: Zigong beyond Technology Co., Ltd. |