CN205546130U - Flash light control circuit and contain its mobile terminal - Google Patents
Flash light control circuit and contain its mobile terminal Download PDFInfo
- Publication number
- CN205546130U CN205546130U CN201620066519.4U CN201620066519U CN205546130U CN 205546130 U CN205546130 U CN 205546130U CN 201620066519 U CN201620066519 U CN 201620066519U CN 205546130 U CN205546130 U CN 205546130U
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- China
- Prior art keywords
- light
- flash
- control circuit
- mobile terminal
- photoconductive resistance
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Abstract
The utility model relates to an electronic equipment technical field discloses a flash light control circuit and contain its mobile terminal. The utility model discloses in, the flash light control circuit contain: power, an at least flash light, electronic switch and photo resistance, flash light, electronic switch and photo resistance concatenate between power and ground, wherein, the size of the impedance of photo resistance increases along with the reinforcing of surrounding environment light. Mobile terminal contain camera, casing and if before flash light control circuit, the casing has feels the light zone territory corresponding to the first sense light zone territory of photo resistance and corresponding to the second of camera, and just the homonymy that the light zone territory is located the terminal is felt with the second in first sense light zone territory. Compared with the prior art, the utility model for the flash light flash the light intensity can be along with surrounding environment light intensity automatically regulated, thereby realize that light is strong, a little less than the light filling, a little less than the light, light filling effect that the light filling is strong, and then effectively improve the image quality promotes the user and shoots experience.
Description
Technical field
This utility model relates to technical field of electronic equipment, particularly to a kind of flash control circuit and bag
Mobile terminal containing it.
Background technology
Along with the development of science and technology, the integrated level of smart mobile phone is the highest, and function is more and more diversified, makes
The modern that becomes work, live, entertain and instrument that each side such as study is indispensable.With setting about
The continuous lifting of machine image quality, increasing user favors in using mobile phone to shoot, therefore eventually
The quality of end image quality becomes one of critical consideration that terminal dominates the market.
It is said that in general, picture pick-up device is each equipped with flash lamp.Flash lamp can be effectively increased light exposure, from
And can be provided in the effect of taking pictures under subdued light conditions.Actual when taking pictures, flash lamp is applied not only to light relatively
The moment illumination of dark occasion, and it is also used for the brighter occasion of light to subject local light filling.
But at present picture pick-up device is given to the driving electric current of flash lamp is changeless, and the flashing of flash lamp
Light intensity is relatively strong, often causes the phenomenon of overexposure of taking a picture night, and the shooting having a strong impact on user is experienced.And
And single light intensity of flashing also cannot carry out suitable exposure compensating, nothing for the light environment varied
Method meets user's actual demand for light exposure.
Utility model content
The purpose of this utility model is the mobile terminal providing a kind of flash control circuit and comprising it,
Flash lamp light intensity of flashing can be automatically adjusted along with surrounding light intensity, thus it be strong to realize light,
Light filling is weak, and light is weak, the light filling effect that light filling is strong, and then is effectively improved image quality, promotes user and claps
Take the photograph experience.
For solving above-mentioned technical problem, embodiment of the present utility model provides a kind of flash lamp and controls electricity
Road, comprises: power supply, at least one flash lamp, electrical switch and photoconductive resistance；Described flash lamp, institute
State electrical switch and described photoconductive resistance is serially connected with between described power supply and ground；Wherein, described photoconductive resistance
The size of impedance increase along with the enhancing of surrounding light.
Of the present utility model embodiment further provides a kind of mobile terminal, comprise: photographic head, housing with
And foregoing flash control circuit；Described housing has the first sense corresponding to described photoconductive resistance
Light region and the second photosensitive region corresponding to described photographic head, and described first photosensitive region is with described
Second photosensitive region is positioned at the homonymy of described terminal.
This utility model embodiment in terms of existing technologies, by flash control circuit increase
Add photoconductive resistance, and photoconductive resistance, flash lamp and electrical switch are serially connected with between power supply and ground, due to
The size of the impedance of photoconductive resistance increases along with the enhancing of surrounding light, thus ambient light around
When line is stronger, the overall impedance in flash control circuit increases, and when ambient light is more weak around,
Overall impedance in flash control circuit reduces, and then it is strong to reach light, and light filling is weak, and light is weak, benefit
The effect of flashing of light intensity so that light intensity of flashing suitably can expose for the light environment varied
Light compensates, and improves image quality further, thus improves user and shoot experience.
Preferably, described flash lamp is two, and after two flash lamp parallel connections with described electrical switch, institute
State photoconductive resistance to be serially connected with between described power supply and ground.Thus can be regulated by a photoconductive resistance simultaneously
The driving electric current of two flash lamies, simple in construction, improve flash lamp further and flash effect.
Preferably, described electrical switch is audion.
Preferably, described flash control circuit also comprises the current-limiting resistance concatenated with described flash lamp.From
And the reference current needed for flash lamp can be provided.
Preferably, described mobile terminal includes the eyeglass corresponding to described photoconductive resistance, and described housing is opened
Being provided with the opening corresponding to described eyeglass, described opening forms described first photosensitive region.
Preferably, described first photosensitive region is the housing transparent region corresponding to described photoconductive resistance.Logical
Cross employing transparent shell, thus improve the sealing of terminal.
Preferably, described mobile terminal also comprises processor, and described processor is connected to described electrical switch
Control end.
Accompanying drawing explanation
Fig. 1 is the flash control circuit according to this utility model the first embodiment with a flash lamp
Structural representation；
Fig. 2 is the flash control circuit according to this utility model the second embodiment with two flash lamies
Structural representation；
Fig. 3 is the structural representation according to this utility model the 3rd embodiment mobile terminal.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing pair
Each embodiment of the present utility model is explained in detail.But, those of ordinary skill in the art can
To understand, in each embodiment of this utility model, in order to make reader be more fully understood that, the application proposes
Many ins and outs.But, even if there is no these ins and outs and kind based on following embodiment
Plant and change and modifications, it is also possible to realize the application each claim technical scheme required for protection.
First embodiment of the present utility model relates to a kind of flash control circuit, as an example rather than limit
System, this flash control circuit can apply to smart mobile phone, panel computer, digital camera etc..Such as figure
Shown in 1, this flash control circuit 1 comprises: power supply 10, flash lamp 11, electrical switch 12, current limliting
Resistance 13 and photoconductive resistance 14.Flash lamp 11, current-limiting resistance 13, electrical switch 12 and photosensitive electricity
Resistance 14 is serially connected with between power supply 10 and ground 15.Flash lamp 11, electrical switch 12, current-limiting resistance 13
And photoconductive resistance 14 can be serially connected with between power supply 10 and ground 15 with random order, and present embodiment is for dodging
The concrete order of connection between light modulation 11, electrical switch 12, current-limiting resistance 13 and photoconductive resistance 14 is not made
Limit.Wherein, the size of the impedance of photoconductive resistance 14 increases along with the enhancing of surrounding light.
Specifically, as a example by smart mobile phone, can directly use the rechargeable battery in mobile phone as sudden strain of a muscle
The power supply of light modulation, rechargeable battery can be lithium battery or soft-package battery, such that it is able to for glistening
Lamp provides stable driving electric current.Flash lamp generally can select highlighted white light-emitting diode.Current limliting electricity
Resistance 13 is for providing the current threshold of flash lamp 11.Such as, cell phone platform cell voltage is about 4 volts,
The current-limiting resistance of 4 ohm can be selected to flash electric current with the benchmark obtaining 1 ampere, and it can meet existing rank
The demand of section major part flash lamp, certainly, the size of current-limiting resistance can be set according to being actually needed,
Should be as limit.Meanwhile, when flash lamp 11 works, photoconductive resistance 14 can be based on surrounding environment light
Line strength generation corresponding impedance, i.e. ambient light is the strongest, and photoconductive resistance impedance is the biggest, and ambient light is more
Weak, photoconductive resistance impedance is the least.So, the impedance changed with ambient light intensity by photoconductive resistance
And coordinate the most exportable electric current that flashes being adapted to varying environment light intensity of current-limiting resistance, and then provide conjunction
Suitable exposure compensation amount.
Table 1
In actual application, the specification of photoconductive resistance can determine by the following method.As shown in table 1, for
The output electric current of suggestion, corresponding flash light intensity and surrounding light intensity synopsis under varying environment.Need
It is noted that the design difference being limited to flash lamp and flashing lamp lens is relatively big, the data in table 1
It is only used as example reference.As shown in Table 1, different environmental light intensities is respectively to there being the corresponding electricity that flashes
Stream, when such as light intensity is about 300 lux illumination, the light intensity of flashing that the electric current that flashes of 50 milliamperes produces
(about 20 lumen) is more suitable, can retrodict out in varying environment thus according to electric current of flash lamp
Resistance requirements under light intensity selects required photoconductive resistance.
Electrical switch 12 can use audion, by the input 121 of audion 12, outfan 122
It is serially connected with between the power supply 10 of flash control circuit 1 and ground 15, the control end of audion 12
120 are connected to control circuit, are used for obtaining control signal.Specifically, when control signal is high level,
The input 121 of audion turns on outfan 122, and flash lamp flashes；When control signal is high level
Time, the input 121 of audion 12 ends with outfan 122, and flash lamp is in the state of turning off the light.
In sum, present embodiment in terms of existing technologies, by increasing photoconductive resistance, and is incited somebody to action
Photoconductive resistance, flash lamp, electrical switch, current-limiting resistance etc. are serially connected with between power supply and ground, thus utilize
The characteristic of photoconductive resistance is automatically adjusted flash lamp and drives electric current, and then can be for the surrounding's ring varied
Environmental light provides suitable exposure compensation amount, improves image quality further, improves user and shoots experience.
Second embodiment of the present utility model relates to a kind of flash control circuit.Second embodiment with
First embodiment is roughly the same, is in place of the main distinction: in the first embodiment, flash lamp
Number is one.And in this utility model the second embodiment, as in figure 2 it is shown, the number of flash lamp 11
Mesh is two, and is serially connected with power supply with electrical switch 12, photoconductive resistance 14 after the parallel connection of two flash lamies 11
Between 10 and ground 15.
Specifically, two flash lamies 11 can be respectively adopted a warm lamp, a cold lamp.Wherein,
Warm lamp such as can use amber warm light diode, and cold lamp can use bright white optical diode.Cold,
Warm double flashing light is with the use of so that light intensity colour temperature of flashing is closer to surrounding light color temperature, further
Improve imaging effect.Warm lamp and cold lamp are in parallel, then with electronic cutting again after concatenating with current-limiting resistance 13 respectively
Pass 12, photoconductive resistance 14 etc. are serially connected with between power supply 10 and ground 15.
Present embodiment controls the exposure compensation amount of two flash lamies, structure by a photoconductive resistance simultaneously
Simply, improve exposure of flash lamp compensation effect further, improve Consumer's Experience.
This utility model the 3rd embodiment relates to a kind of mobile terminal, comprises: processor, photographic head,
Fore shell and the flash control circuit as described in the first or second embodiment.As an example rather than limit
System, mobile terminal can be smart mobile phone, and photographic head can be the post-positioned pick-up head of smart mobile phone, but,
Photographic head should not be limited with the post-positioned pick-up head in present embodiment.Processor is connected to the control of electrical switch
End processed.As it is shown on figure 3, housing 3 has the first photosensitive region 30 corresponding to photoconductive resistance and correspondence
In the second photosensitive region 31 of photographic head, and the first photosensitive region 30 and the second photosensitive region 31 are positioned at end
The homonymy of end.
Specifically, processor passes through a GPIO (letter for General Purpose Input Output
Claiming, universal input/output) pin is connected to the control end of electrical switch, thus when needs flash, GPIO
Signal can be drawn high audion and control end, it is not necessary to when flashing, and GPIO signal drags down audion and controls end.
Photoconductive resistance surface mount is in the circuit board of mobile terminal, and mobile terminal includes corresponding to photoconductive resistance
Eyeglass, housing offers the opening corresponding to eyeglass, and opening forms the first photosensitive region.Photoconductive resistance
By the first photosensitive region sensing surrounding light intensity, and photographic head is photosensitive by the second photosensitive region
Imaging, is arranged at the homonymy of housing by the first photosensitive region and the second photosensitive region, so that photosensitive electricity
Hinder with photographic head residing for ambient light conditions consistent, and then make flash lamp can provide accurate
Light exposure.
This utility model the 4th embodiment relates to a kind of mobile terminal.4th embodiment and the 3rd is implemented
Mode is roughly the same, is in place of the main distinction: in the third embodiment, housing offer corresponding to
The opening of eyeglass, opening forms the first photosensitive region, and in this utility model the 4th embodiment, the
One photosensitive region is the housing transparent region corresponding to photoconductive resistance.
Specifically, transparent material can be used to make housing, corresponding to the sense of photoconductive resistance on housing
The trypsin method light shield layer in light region, so that photoconductive resistance is photosensitive by housing transparent region.Thus can
To reduce shell nozzle, improve the sealing of terminal.
It will be understood by those skilled in the art that the respective embodiments described above be realize of the present utility model
Specific embodiment, and in actual applications, can to it, various changes can be made in the form and details, and
Without departing from spirit and scope of the present utility model.
Claims (8)
1. a flash control circuit, it is characterised in that comprise: power supply, at least one flash lamp,
Electrical switch and photoconductive resistance；
Described flash lamp, described electrical switch and described photoconductive resistance are serially connected with between described power supply and ground；
Wherein, the size of the impedance of described photoconductive resistance increases along with the enhancing of surrounding light.
Flash control circuit the most according to claim 1, it is characterised in that described flash lamp
It is two, and is serially connected with described electricity with described electrical switch, described photoconductive resistance after two flash lamp parallel connections
Between source and ground.
Flash control circuit the most according to claim 1, it is characterised in that described electronic cutting
Close as audion.
Flash control circuit the most as claimed in any of claims 1 to 3, its feature exists
In, described flash control circuit also comprises the current-limiting resistance concatenated with described flash lamp.
5. a mobile terminal, it is characterised in that comprise photographic head, housing and such as claim 1
Flash control circuit described in any one in 4；
Described housing has the first photosensitive region corresponding to described photoconductive resistance and takes the photograph described in corresponding to
As the second photosensitive region of head, and described first photosensitive region is positioned at described end with described second photosensitive region
The homonymy of end.
Mobile terminal the most according to claim 5, it is characterised in that described mobile terminal comprises
The eyeglass corresponding to described photoconductive resistance, described housing is had to offer the opening corresponding to described eyeglass, institute
State opening and form described first photosensitive region.
7. according to the mobile terminal described in claim 5, it is characterised in that described first photosensitive area
Territory is the housing transparent region corresponding to described photoconductive resistance.
8. according to the mobile terminal described in claim 5, it is characterised in that described mobile terminal is also
Comprising processor, described processor is connected to the control end of described electrical switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066519.4U CN205546130U (en) | 2016-01-22 | 2016-01-22 | Flash light control circuit and contain its mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620066519.4U CN205546130U (en) | 2016-01-22 | 2016-01-22 | Flash light control circuit and contain its mobile terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205546130U true CN205546130U (en) | 2016-08-31 |
Family
ID=56768149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620066519.4U Expired - Fee Related CN205546130U (en) | 2016-01-22 | 2016-01-22 | Flash light control circuit and contain its mobile terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205546130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106412456A (en) * | 2016-12-06 | 2017-02-15 | 上海传英信息技术有限公司 | Flash device and shooting device |
-
2016
- 2016-01-22 CN CN201620066519.4U patent/CN205546130U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106412456A (en) * | 2016-12-06 | 2017-02-15 | 上海传英信息技术有限公司 | Flash device and shooting device |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20160831 Termination date: 20200122 |