CN201444648U - Auto-adjusting circuit for button light brightness and mobile phone with same - Google Patents
Auto-adjusting circuit for button light brightness and mobile phone with same Download PDFInfo
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- CN201444648U CN201444648U CN2009200299855U CN200920029985U CN201444648U CN 201444648 U CN201444648 U CN 201444648U CN 2009200299855 U CN2009200299855 U CN 2009200299855U CN 200920029985 U CN200920029985 U CN 200920029985U CN 201444648 U CN201444648 U CN 201444648U
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- key lamp
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Abstract
The utility model discloses an auto-adjusting circuit button for light brightness and a mobile phone with the same. The auto-adjusting circuit comprises a button light unit, a CPU, a button scanning circuit and a camera; and the CPU is connected with the button light unit through a button light drive circuit. When the CPU detects that the buttons are activated through the button scanning circuit, the camera is started to perform image sampling to the external environment, so as to extract light intensity signals from the collected images and generate corresponding drive control signals through the light intensity signals; the drive control signals are output to the button light drive circuit; and the button light drive circuit can generate analog voltages or analog currents with different amplitudes according to different drive control signals, and the analog voltages or the analog currents are output to the button light unit to adjust the brightness of the button light. The circuit can automatically adjust the brightness of the button light according to the light intensity of the external environment, thereby effectively reducing electric quantity consumption, and prolonging the hours of use of batteries under the premise of normally meeting the use requirements of a user.
Description
Technical field
The utility model belongs to the mobile communication equipment technical field, specifically, relates to a kind ofly can regulate the control circuit of press key lamp brightness automatically and adopt the designed camera mobile phone of this press key lamp automatic brightness regulation circuit.
Background technology
Current cell phone appearance design main flow is ultra-thin, large-size screen monitors, and such structural design certainly will cause the structure space of battery very little, makes battery capacity less, and mobile phone has been caused sizable challenge cruising time.
The press key lamp controlling schemes of existing mobile phone adopts " often opening ", " normal closing " and " User Defined is lighted the period " three kinds of alternative control modes substantially.When selecting " normal closing " option for use, the use of very inconvenient mobile phone under the environment of the night or the low light level, thereby rare user selects this state; And select " User Defined is lighted the period " option for use, though can satisfy most users' normal use, but, need usually experience the varying environment of high light, low light level checker for the certain user, " User Defined is lighted the period " mode also seems inconvenient in this case, therefore, this class user has only selection " often to open " option could to satisfy use under the various environment.But " often holding " state can increase electric quantity consumption undoubtedly, shortens the cruising time of mobile phone.
The utility model content
The purpose of this utility model is to provide a kind of control circuit that can regulate press key lamp brightness according to the light intensity of external environment condition automatically, can both normally use under the prerequisite of mobile phone under the various environment satisfying the user, can play effective reduction electric quantity consumption, prolong the mobile phone effect in cruising time.
For solving the problems of the technologies described above, the utility model is achieved by the following technical solutions:
A kind of press key lamp automatic brightness regulation circuit comprises press key lamp unit, CPU and the key scanning circuit and the camera that are connected with described CPU; Described CPU connects described press key lamp unit by a press key lamp drive circuit, when CPU detects button and is activated by described key scanning circuit, start camera external environment condition is carried out image sampling, and then from the image that collects, extract light intensity signal, and export described press key lamp drive circuit to according to this light intensity signal generation corresponding driving control signal; Described press key lamp drive circuit exports described press key lamp unit to according to aanalogvoltage or the analog current that different drive control signal generates different amplitudes, and the brightness of press key lamp is regulated.
Wherein a kind of design as described press key lamp drive circuit, in described press key lamp drive circuit, include a digital to analog converter, CPU generates described drive control signal with number format, export the input of described digital to analog converter to, described digital to analog converter generates corresponding analog voltage signal with the drive control signal conversion that receives, export described press key lamp unit to by its output, brightness to press key lamp is regulated, and can realize the continuous variation of press key lamp brightness thus.
Another design as described press key lamp drive circuit, in described press key lamp drive circuit, include a variable connector, the common port of described variable connector connects DC power supply, many switch ways connects described press key lamp unit by current-limiting resistance separately, the gating control end of variable connector connects described CPU, receives the drive control signal of CPU output; Described CPU generates described drive control signal in the mode of gated data, export variable connector to and select different switch ways conductings to control described variable connector, and then change outputs to the analog current size of press key lamp unit, regulate with brightness, can realize that thus the brightness of a plurality of gears is selected press key lamp.
In order further to reduce power consumption, the light intensity that makes the backlight illumination of display screen also can follow external environment condition is realized regulating automatically, for the stronger press key lamp drive circuit of driving force, the output of described press key lamp drive circuit can be connected with the backlight of display screen simultaneously, when regulating press key lamp brightness, regulate the backlight illumination of display screen.And for the more weak press key lamp drive circuit of driving force, then the output of described press key lamp drive circuit can be connected with a backlight drive circuit earlier, after utilizing described backlight drive circuit that the aanalogvoltage of press key lamp drive circuit output or analog current are carried out the amplitude processing and amplifying, output to the backlight of display screen again, be implemented in the backlight illumination of regulating display screen when regulating press key lamp brightness.
Certainly, also described backlight drive circuit directly can be connected with CPU, receive the drive control signal of CPU output, and export display screen to, the backlight illumination of display screen is regulated according to aanalogvoltage or the analog current that different drive control signal generates different amplitudes.
Further again, in order to improve the response speed of press key lamp, avoid allowing the user produce the sensation of delay of response, described CPU is when detecting button and be activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit to, and control connected press key lamp with lit at maximum brightness by the press key lamp drive circuit; Then CPU starts camera external environment condition is carried out image sampling, and then exports described press key lamp drive circuit to according to ambient light intensity signal generation corresponding driving control signal, to regulate press key lamp brightness.
Further, described CPU is when detecting button and be activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit to, and control connected press key lamp on the one hand with lit at maximum brightness by the press key lamp drive circuit, export the aanalogvoltage of maximum amplitude or analog current on the other hand to described backlight drive circuit, and then the backlight by described backlight drive circuit control display screen is with lit at maximum brightness; Then CPU starts camera external environment condition is carried out image sampling, and then generates the output of corresponding driving control signal according to the ambient light intensity signal, to regulate the brightness of press key lamp and display backlight lamp.
Certainly, for the backlight drive circuit that directly is connected with the drive control signal output of CPU, then when CPU detects button and is activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit and backlight drive circuit respectively to, the backlight of control press key lamp and display screen is with lit at maximum brightness; Then CPU starts camera external environment condition is carried out image sampling, and then generates the output of corresponding driving control signal according to the ambient light intensity signal, regulates the brightness of press key lamp and display backlight lamp simultaneously.
In conjunction with above-mentioned press key lamp automatic brightness regulation circuit structure, the utility model provides a kind of designed mobile phone of described press key lamp automatic brightness regulation circuit that adopts again, when the user triggers the push button exciting mobile phone, CPU in the mobile phone at first opens the camera of the usefulness of taking pictures, rapidly external environment condition is carried out image sampling; Then the image that collects is transferred to the leaching process that CPU carries out light intensity signal; CPU generates the corresponding driving control signal according to the light intensity signal that extracts and exports the press key lamp drive circuit to; Utilize press key lamp drive circuit conversion to generate the aanalogvoltage or the analog current of different amplitudes, export the press key lamp unit to, luminous to drive the press key lamp unit, and its luminosity controlled.
Compared with prior art, advantage of the present utility model and good effect are: press key lamp automatic brightness regulation circuit of the present utility model is regulated press key lamp brightness automatically according to the light intensity of external environment condition, satisfying under the normal prerequisite of using of user, can effectively reduce electric quantity consumption, prolong the service time of battery.Be applied in the design of mobile phone circuit, the power consumption of mobile phone can be reduced to minimum,, prolong the cruising time of mobile phone, adapt to the lightening day by day development trend of handset structure design to improve the utilization rate of electrical of mobile phone.
After reading the detailed description of the utility model execution mode in conjunction with the accompanying drawings, other characteristics of the present utility model and advantage will become clearer.
Description of drawings
Fig. 1 is the schematic block circuit diagram of a kind of embodiment of the press key lamp automatic brightness regulation circuit that proposes of the utility model;
Fig. 2 is the circuit theory diagrams of a kind of embodiment of press key lamp drive circuit among Fig. 1;
Fig. 3 is the circuit theory diagrams of another embodiment of press key lamp drive circuit among Fig. 1;
Fig. 4 is the control flow chart of press key lamp brightness;
Fig. 5 is the press key lamp brilliance control flow chart after optimizing.
Embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is described in detail.
The utility model can be realized regulating automatically for the brightness that makes press key lamp according to the light intensity of external environment condition, to reduce the electric quantity consumption of equipment, proposed press key lamp automatic brightness regulation circuit as shown in Figure 1, having comprised: be used for whether button is triggered and has triggered the key scanning circuit which button detects in real time; Be used to gather the camera of external environment condition image; CPU as key control unit; The drive control signal of CPU output is converted to the aanalogvoltage of different amplitudes or analog current to be used for regulating the press key lamp drive circuit of press key lamp brightness; And press key lamp unit.
Described key scanning circuit, camera, press key lamp drive circuit all are connected with described CPU, when CPU detects the user and triggers push button exciting equipment (such as mobile phone) by key scanning circuit, at first, start camera and rapidly external environment condition is carried out image sampling to camera output control signal.Camera is delivered to CPU with the view data that sampling obtains, CPU obtains intensity information in the picture by certain image processing algorithm, and then the brightness of press key lamp is set according to this intensity information, promptly generate the corresponding driving control signal and transfer to the press key lamp drive circuit, utilize the conversion of press key lamp drive circuit to generate the aanalogvoltage or the analog current of certain amplitude, export the press key lamp unit to and light press key lamp, and output to the aanalogvoltage of press key lamp unit or the brightness that current amplitude changes press key lamp by change, to realize that press key lamp brightness is with the self-regulating purpose of design of the variation of external environment condition luminous intensity.
As expansion utilization to this technology, can be when regulating press key lamp brightness, the backlight illumination of equipment display screen is realized regulating simultaneously, thereby the backlight illumination of display screen also can be automatically adjusted along with the external environment condition light intensity, to reach the purpose of design of further saving electric energy.Based on this, the utility model has connected one road backlight drive circuit simultaneously at the output of press key lamp drive circuit, described backlight drive circuit can carry out the equal proportion power amplification to the aanalogvoltage or the analog current of press key lamp drive circuit output, under the prerequisite that satisfies backlight driving requirement, to the brightness realization control of backlight.This circuit structure is applied in the mobile phone, can saves the power consumption that mobile phone is used for the illumination aspect more effectively, obviously prolong the cruising time of mobile phone.
Certainly, has press key lamp drive circuit for some than high driving ability, if the aanalogvoltage of its output or analog current have been enough to satisfy the drive controlling to backlight, then can save the design of backlight drive circuit, and the output of press key lamp drive circuit directly is connected with the display backlight lamp, regulate when utilizing the aanalogvoltage of different amplitudes of press key lamp drive circuit output and analog current to realize, to reduce the hardware circuit cost of equipment press key lamp and brightness of backlight.
In addition, also described backlight drive circuit directly can be connected with CPU, receive the drive control signal of CPU output, and export display screen to, the backlight illumination of display screen is regulated according to aanalogvoltage or the analog current that different drive control signal generates different amplitudes.
For the design of press key lamp drive circuit among Fig. 1, describe in detail below by two specific embodiments.
Embodiment one, and referring to shown in Figure 2, present embodiment adopts a digital to analog converter DAC to design described press key lamp drive circuit.The input of DAC is connected CPU, receive the drive control signal of CPU output.CPU generates described drive control signal with number format, and promptly the pairing data value of aanalogvoltage amplitude exports DAC to by its data-interface.DAC carries out digital signal after the conversion of analog signal to the drive control signal that receives, and generates the aanalogvoltage of respective magnitudes, and the output by DAC exports the press key lamp unit to, directly drives press key lamp and lights, and the brightness of press key lamp is controlled.
Adopt DAC to design the continuous variation that the press key lamp drive circuit can be realized press key lamp brightness, thereby can set out desirable press key lamp brightness at various external environment light intensities.Weak point is to need the DAC chip, makes hardware cost that certain increase be arranged.
Embodiment two, and referring to shown in Figure 3, present embodiment adopts a variable connector to cooperate a plurality of current-limiting resistances to design described press key lamp drive circuit.With the DC power supply of the common port connection device inside of variable connector, such as+the 5V DC power supply; Many switch ways of variable connector separately by one road current-limiting resistance R1, R2 ..., Rn connects described press key lamp unit; The gating control end connection of variable connector is connected with described CPU, receives the drive control signal of CPU output.Here, the drive control signal of described CPU output need generate in the gated data mode that variable connector is supported, export variable connector to and select different switch ways conductings to control described variable connector, and then change outputs to the analog current size of press key lamp unit, to realize effective adjusting to press key lamp brightness, specifically, when the light of external environment is strong, CPU control variable connector is selected a road or the conducting of double switch path wherein, the electric current that exports the press key lamp unit this moment to is less, press key lamp brightness is lower, not influencing under the normal prerequisite of using of user, has saved electric energy.And when the light of external environment is dark, can clearly see each button in order to ensure the user, need to strengthen the brightness of press key lamp.At this moment, CPU output drive control signal control variable connector is selected most or all switch ways conductings wherein, the electric current that exports the press key lamp unit to is increased, thereby strengthen the luminous intensity of press key lamp, to satisfy user's user demand.
Adopt this design, it is lower to compare DAC chip cost, but can not realize the continuous adjusting of press key lamp brightness, can only realize that the brightness on several gears is selected, and therefore, result of use is not as embodiment one ideal.
Control flow to press key lamp brightness describes in detail below.
With the mobile phone is example, and referring to shown in Figure 4, when user's operation push-button activated mobile phone, mobile phone was at first opened the camera of the usefulness of taking pictures, rapidly external environment condition is carried out image sampling; Then, camera is delivered to CPU with the view data that sampling obtains, and CPU calls its inner image processing algorithm and extracts intensity information in the view data, calculates the driving numerical value of press key lamp brightness then according to this intensity information, be drive control signal, export the press key lamp drive circuit to; Afterwards, the press key lamp drive circuit exports the press key lamp unit to according to aanalogvoltage or the analog current that the drive control signal that receives generates respective magnitudes, to light press key lamp.
When this control flow can only be implemented in mobile phone and just has been activated, regulate the brightness of press key lamp according to the light intensity of external environment condition at that time, and after continuous use in, press key lamp brightness will remain constant.So, if the user transfers to the place that ambient light has significant difference again after Activating Phone, such as outdoorly transferring to dim indoorly from bright, be applicable to outdoor press key lamp brightness in the indoor luminance shortage that just seems this moment, thereby influenced user's normal use.
In order to address this problem, can in CPU, write a spot of software program, allow the light intensity of CPU deactivation camera collection external environment condition regularly, thereby timing adjusting is carried out in the brightness of press key lamp, to satisfy the normal use of user under varying environment.
In addition, if according to above-mentioned thinking design press key lamp drive circuit, need activate when lighting at press key lamp, all will pass through links such as ambient image collection, intensity signal extraction, drive circuit control earlier, press key lamp could be lighted afterwards.It is slow to the press key lamp response speed that this series of processes link makes that the user understands visual sense, is inconvenient to use.Therefore, can be optimized improvement, promptly on the control data of press key lamp drive circuit, make suitable modification above-mentioned design.When press key lamp need be activated when lighting, with complete bright Data Control press key lamp drive circuit and/or backlight drive circuit, then carry out the data acquisition of external environment luminous intensity, after the intensity information that gets access to external environment, use corresponding numerical value again instead and remove to control press key lamp drive circuit and/or backlight drive circuit.So, do not have the use experience that time delay influences the user, can realize the purpose of design of power saving, referring to shown in Figure 5 according to the intensity adjustments press key lamp brightness of external environment light and/or the backlight illumination of display screen again.
Certainly; the above only is a kind of preferred implementation of the present utility model; should be noted that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (10)
1. a press key lamp automatic brightness regulation circuit comprises press key lamp unit, CPU and the key scanning circuit and the camera that are connected with described CPU; It is characterized in that: described CPU connects described press key lamp unit by a press key lamp drive circuit, when CPU detects button and is activated by described key scanning circuit, start camera external environment condition is carried out image sampling, and then from the image that collects, extract light intensity signal, and export described press key lamp drive circuit to according to this light intensity signal generation corresponding driving control signal; Described press key lamp drive circuit exports described press key lamp unit to according to aanalogvoltage or the analog current that different drive control signal generates different amplitudes, and the brightness of press key lamp is regulated.
2. press key lamp automatic brightness regulation circuit according to claim 1, it is characterized in that: in described press key lamp drive circuit, include a digital to analog converter, CPU generates described drive control signal with number format, export the input of described digital to analog converter to, described digital to analog converter generates corresponding analog voltage signal with the drive control signal conversion that receives, export described press key lamp unit to by its output, the brightness of press key lamp is regulated.
3. press key lamp automatic brightness regulation circuit according to claim 1, it is characterized in that: in described press key lamp drive circuit, include a variable connector, the common port of described variable connector connects DC power supply, many switch ways connects described press key lamp unit by current-limiting resistance separately, the gating control end of variable connector connects described CPU, receives the drive control signal of CPU output; Described CPU generates described drive control signal in the mode of gated data, export variable connector to and select different switch ways conductings to control described variable connector, and then change the analog current size that outputs to the press key lamp unit, regulate with brightness press key lamp.
4. press key lamp automatic brightness regulation circuit according to claim 1 is characterized in that: the output of described press key lamp drive circuit connects the backlight of display screen simultaneously, regulates the backlight illumination of display screen when regulating press key lamp brightness.
5. press key lamp automatic brightness regulation circuit according to claim 1, it is characterized in that: the output of described press key lamp drive circuit connects backlight drive circuit, after described backlight drive circuit carries out the amplitude processing and amplifying to the aanalogvoltage of press key lamp drive circuit output or analog current, export the backlight of display screen to, when regulating press key lamp brightness, regulate the backlight illumination of display screen.
6. press key lamp automatic brightness regulation circuit according to claim 1, it is characterized in that: described CPU exports the drive control signal that generates to a backlight drive circuit simultaneously, described backlight drive circuit exports display screen to according to aanalogvoltage or the analog current that the different driving control signal that receives generates different amplitudes, and the backlight illumination of display screen is regulated.
7. press key lamp automatic brightness regulation circuit according to claim 1, it is characterized in that: described CPU is when detecting button and be activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit to, and control connected press key lamp with lit at maximum brightness by the press key lamp drive circuit; Then CPU starts camera external environment condition is carried out image sampling, and then exports described press key lamp drive circuit to according to ambient light intensity signal generation corresponding driving control signal, to regulate press key lamp brightness.
8. press key lamp automatic brightness regulation circuit according to claim 5, it is characterized in that: described CPU is when detecting button and be activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit to, and control connected press key lamp on the one hand with lit at maximum brightness by the press key lamp drive circuit, export the aanalogvoltage of maximum amplitude or analog current on the other hand to described backlight drive circuit, and then the backlight by described backlight drive circuit control display screen is with lit at maximum brightness; Then CPU starts camera external environment condition is carried out image sampling, and then generates the output of corresponding driving control signal according to the ambient light intensity signal, to regulate the brightness of press key lamp and display backlight lamp.
9. press key lamp automatic brightness regulation circuit according to claim 6, it is characterized in that: described CPU is when detecting button and be activated, at first generate complete bright pairing drive control signal and export described press key lamp drive circuit and backlight drive circuit respectively to, the backlight of control press key lamp and display screen is with lit at maximum brightness; Then CPU starts camera external environment condition is carried out image sampling, and then generates the output of corresponding driving control signal according to the ambient light intensity signal, to regulate the brightness of press key lamp and display backlight lamp.
10. a mobile phone is characterized in that: include as the described press key lamp automatic brightness regulation circuit of each claim in the claim 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200299855U CN201444648U (en) | 2009-07-18 | 2009-07-18 | Auto-adjusting circuit for button light brightness and mobile phone with same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200299855U CN201444648U (en) | 2009-07-18 | 2009-07-18 | Auto-adjusting circuit for button light brightness and mobile phone with same |
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| CN201444648U true CN201444648U (en) | 2010-04-28 |
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| CN2009200299855U Expired - Fee Related CN201444648U (en) | 2009-07-18 | 2009-07-18 | Auto-adjusting circuit for button light brightness and mobile phone with same |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102958241A (en) * | 2011-08-18 | 2013-03-06 | 财团法人工业技术研究院 | Lighting control systems and methods,handheld device and medium |
| CN106340272A (en) * | 2016-08-24 | 2017-01-18 | 珠海格力电器股份有限公司 | Electronic device and backlight control method and device thereof |
| CN106658834A (en) * | 2016-11-28 | 2017-05-10 | 邵建军 | Novel eye-protection lamp system |
| CN109842978A (en) * | 2017-11-24 | 2019-06-04 | 神讯电脑(昆山)有限公司 | Adjust the circuit of breath light brightness |
| CN110389536A (en) * | 2018-04-16 | 2019-10-29 | 浙江新涛电子科技有限公司 | A kind of household electrical appliances controller and its application method |
| CN111640399A (en) * | 2020-05-29 | 2020-09-08 | 创维液晶器件(深圳)有限公司 | Liquid crystal display module and brightness adjusting method, equipment, test board and medium thereof |
-
2009
- 2009-07-18 CN CN2009200299855U patent/CN201444648U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102958241A (en) * | 2011-08-18 | 2013-03-06 | 财团法人工业技术研究院 | Lighting control systems and methods,handheld device and medium |
| CN102958241B (en) * | 2011-08-18 | 2015-07-08 | 财团法人工业技术研究院 | Lighting control systems and methods,handheld device |
| CN106340272A (en) * | 2016-08-24 | 2017-01-18 | 珠海格力电器股份有限公司 | Electronic device and backlight control method and device thereof |
| CN106658834A (en) * | 2016-11-28 | 2017-05-10 | 邵建军 | Novel eye-protection lamp system |
| CN109842978A (en) * | 2017-11-24 | 2019-06-04 | 神讯电脑(昆山)有限公司 | Adjust the circuit of breath light brightness |
| CN110389536A (en) * | 2018-04-16 | 2019-10-29 | 浙江新涛电子科技有限公司 | A kind of household electrical appliances controller and its application method |
| CN111640399A (en) * | 2020-05-29 | 2020-09-08 | 创维液晶器件(深圳)有限公司 | Liquid crystal display module and brightness adjusting method, equipment, test board and medium thereof |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100428 Termination date: 20120718 |