CN201039295Y - A digital picture frame - Google Patents
A digital picture frame Download PDFInfo
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- CN201039295Y CN201039295Y CNU2007201422580U CN200720142258U CN201039295Y CN 201039295 Y CN201039295 Y CN 201039295Y CN U2007201422580 U CNU2007201422580 U CN U2007201422580U CN 200720142258 U CN200720142258 U CN 200720142258U CN 201039295 Y CN201039295 Y CN 201039295Y
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Abstract
The utility model provides a digital photo frame, which comprises a main body circuit used for storing the data and decoding the image for the data as well as displaying the corresponding images; at least one inductor used for inducting whether people exists or not at a preset range and sending the detection result to a power managing unit; the power managing unit which obtains the detection result and select a preset operation mode to realize the power-saving control for the main body circuit according to the detection result; and a power unit which supplies power to the main body circuit, the power managing circuit and at least one inductor.
Description
Technical field
The utility model relates to the mass consumption electronic applications, relates in particular to a kind of DPF.
Background technology
Along with continuous progress in science and technology, increasing mass consumption electronic product appears in people's the life life that is convenient for people to and amusement.A kind of DPF (Digital PhotoFrame, DPF) that just occurs is exactly a kind of mass consumption electronic product that is used for showing digital photograph in recent years.Usually the DPF fixed placement is in places such as family, offices, it mainly shows form static images such as JPEG automatically, can also play form music such as video image, MP3 such as MPEG4 automatically, increase people's life, work temperament and interest, it is communicated by letter with mobile phone, MP4 etc., the form of mobile portable product is very different.
The content that DPF displays the play leaves on Flash Card (flash memory) cards such as built-in Flash chip or external CF, MS, MMC, SM, MicroDrive usually.And can pass through wired or wireless communication down loading updating contents such as USB, WiFi.Display screen adopts liquid crystal (LCD) screen usually, also can adopt OLED screen etc.
Existing DPF product power consumption is very big, needs ac power supply usually, and this place that requires to place DPF possesses AC power supply jack, and this is not easily concerning a lot of application scenarios, has influenced popularizing of DPF.Though individual product can be used powered battery, but because the high power consumption of DPF makes DPF when battery-powered operation, the several hrs of can only working, this charges with regard to needs frequent replacing battery or to battery, causes the increase of battery use cost or uses very inconvenient.
Similar method in mobile phone, the MP4 player is generally continued to use in existing DPF power saving design.Mobile phone, MP4 are usually according to network state, manual operation, predefined mode of operation, clock timing setting mode of operation etc., whether control the operating state of each circuit module (for example display screen, interface, communication module, storage medium) (for example works, the voltage of work, frequency etc.), to reach the purpose of saving electric weight to greatest extent.But because handheld mobile devices such as mobile phone, MP4 have different application scenarioss with DPF, the power conservation techniques of original mobile phone, MP4 just not exclusively is applicable to DPF.In order to reduce the power consumption of DPF significantly, need carry out the control of power saving according to the products characteristics of DPF.
The utility model content
The technical problem that the utility model embodiment will solve provides a kind of electricity saving method and device of DPF.
For solving above-mentioned technical problem of carrying out power saving according to the products characteristics of DPF, the purpose of the utility model embodiment is achieved through the following technical solutions, and the utility model comprises:
The main body circuit is used to store data, described data is carried out picture decoding and shown corresponding image;
At least one inductor, whether the scope that preset in have human body, testing result is sent to Power Management Unit if being used to respond to;
Power Management Unit is obtained testing result, by the mode of operation that described testing result is selected to preset the main body circuit is carried out power-saving control;
Power subsystem is for described main body circuit, Power Management Unit and at least one inductor provide power supply.
Above technical scheme as can be seen, the utility model embodiment detects in the DPF certain limit by being increased in whether the close function of people is arranged, make the described DPF of the utility model embodiment more be directed to the application mode of DPF with respect to the power saving mode of prior art, make that the power-saving control of DPF is fine and smooth more, effectively reduced the power consumption of DPF.
Description of drawings
Fig. 1 is the utility model embodiment DPF system diagram;
The functional circuit that Fig. 2 comprises for the utility model embodiment main body circuit;
Fig. 3 is the utility model embodiment sensor structure figure;
State transition graph when Fig. 4 is two kinds of mode of operations of the utility model embodiment;
Fig. 5 has the DPF system diagram of real-time clock unit for the utility model embodiment;
Fig. 6 has the DPF system diagram of remote control receiving element for the utility model embodiment;
State transition graph when Fig. 7 is three kinds of mode of operations of the utility model embodiment;
State transition graph when Fig. 8 is five kinds of mode of operations of the utility model embodiment;
Fig. 9 is the utility model embodiment Power Management Unit structure chart.
Embodiment
The purpose of the utility model embodiment is to provide a kind of DPF of power saving more and the electricity saving method of DPF.For achieving this end, the utility model embodiment realizes by following proposal:
Referring to Fig. 1, be the utility model embodiment system diagram;
Have at the DPF described in the embodiment 1: main body circuit 03, inductor 01, Power Management Unit 02, power module 04;
The basic function of DPF main body circuit is to finish picture decoding and demonstration.Decoded image is stored on the storage medium with the compressed bit stream form, and typical image compression format is JPEG; Can also be used to audio plays, video file.
The main body circuit can comprise functional circuit as shown in Figure 2:
311 microprocessor units: comprise processor, general input-output unit, interrupt control unit, serial/Remote Control Interface unit, timing unit (Timer), watchdog unit and relevant bus system thereof.That microprocessor unit is handled is parallel, serial signal with communicate by letter, control whole digital photo frame main body circuit working, and can bear processing such as picture decoding and audio decoder.
Processor can use single-chip microcomputer (as being compatible with 8051 Series chip), risc processor (as ARM7) or DSP, and can dispose buffer memory or high-speed cache (Cache) on the sheet.
General input-output unit can insert input switch amounts such as button, and LED light etc. is lighted in output.
Interrupt control unit is accepted outside or internal element interruption controls signal, send microprocessor processes.
Serial and Remote Control Interface unit generally include RS232 serial line interface and/or infrared remote control serial signal interface.
Timing unit (Timer) is used for processor regularly.
Whether the dog unit that opens the door is used for measurement processor and crashes, and startup processor again can reset during deadlock.
Processor unit can also dispose analog digital converting unit, receives analog input signal.
312 image decoders: finish the decoding of JPEG rest image, can also finish the MPEG4 video decode.Typically, some complex calculation are handled with Digital Logical Circuits and are realized that microprocessor software can be finished treatment steps such as code stream analyzing.
Shows signal is exported to display screen in 313 image processing and demonstration output interface unit, to simulating display screen, needs digital-to-analogue conversion.
314 display screens, when display screen used simulation LCD screen, the main body circuit also comprised the screen drive circuit.
315 dynamic memory controllers: SDRAM or DDR sdram interface are provided.
316SDRAM typical data bit wide is 16bit.SDRAM also can be DDR SDRAM.The SDRAM typical volume is 8M Bytes.
317 static storage and Flash controller: Flash is provided interface, comprises NAND Flash interface.
318Flash memory: be used to deposit processor program and/or image code stream.Be generally NANDFlash, wherein actuating section is a NOR Flash piece.
The main body circuit can also comprise:
319 audio decoders: compression audio decoders such as MP3 are provided.Can realize with Digital Logical Circuits, also can decode with microprocessor software.
320 audio frequency DAC (digital-to-analogue conversion) and output interface unit;
321 loud speakers.
322 memory card interface unit: insert various flash cards,, provide the external image code stream as the SD card;
323 communication units: as USB interface (USB1.1, USB 2.0, USB OTG), wave point such as WiFi, bluetooth (Bluetooth) etc.
Clock, reset unit: this unit all has with each functional unit of main body circuit and is connected, for the main body circuit provides each work clock, reset signal.
Bus system: connect each main body circuit module.Typical in the AMBA bus, comprise AHB and APB.
In some cases, the main body circuit can also comprise the I2C unit, is used for communicating by letter of main body circuit and Power Management Unit.
Below roughly introduced each functional module in the DPF main body circuit, briefly introduced the basic step of its picture decoding and demonstration here, this step comprises:
1, the compressed image code stream is prestored into storage medium;
Storage medium generally adopts non-volatile memory device, is typically flash memory (Flash).
This device can onboard flash memory, and code stream is poured into the onboard flash memory from external equipment in advance by interface.Described interface includes line interface and wave point, wireline interface such as flash memory card interface, USB interface (USB1.1, USB 2.0, USB OTG), wave point such as WiFi, bluetooth (Bluetooth) etc.Described external equipment can be flash card, digital camera, PC computer, portable hard disk, mobile phone, or the server on the network etc.
Code stream also can directly leave in the flash card, and flash card is inserted on the memory card interface unit of this digital photo frame.
2, from storage medium, read one section compressed image code stream by the setting order;
Usually bear the picture decoding process control with a processor.Reading, decode and showing by processor program of code stream controlled, and concrete order can be by Automatic Program or artificial the setting.
The main body circuit also disposes dynamic ram usually, and as SDRAM, before the decoding, the code stream that can read big section in advance from Flash dumps among the SDRAM, reads a bit of decoding during picture decoding again from SDRAM.
3, this segment encode stream is decompressed;
For jpeg compressed image, the decoding basic procedure comprises steps such as entropy decoding, counter-scanning, inverse transformation, anti-DCT.
4,, decompressing image is carried out format conversion, convergent-divergent processing, output shows signal according to the display screen display requirement;
The form of decompressing image was generally YCbCr 4: 2: 0, in order to satisfy display screen shows signal form, dimensional requirement, guarantee display quality, need carry out format conversion, as change 4: 2: 2 forms of YCbCr, rgb format etc. into, and amplifying or narrow down to scanning resolution, the size of display screen requirement, format conversion and convergent-divergent adopt digital filter to finish usually.
Different display screens is to shows signal call format difference.For the digital display screen, need to generate corresponding digital scanning shows signal (containing capable field synchronization digital signal).For simulating display screen, need carry out digital-to-analogue conversion in advance, become analog signal output.
5, display screen display image;
The image display panel that digital photo frame is commonly used has liquid crystal display (LCD) and OLED (Organic LightEmitting Display, i.e. organic light emitting display) two big classes.In the LCD image display panel, TFT (Thin Film Transistor, thin-film transistor) commonly used.
LCD display generally includes LCD, backlight circuit, drive circuit etc.
The power consumption of display screen accounts for the major part of digital photo frame power consumption, and size is got over large-screen, and corresponding power consumption is also big more during demonstration.
Still image also has MJPEG, JPEG2000, BMP or the like except that JPEG.H.264 or the like except that the still image decoding and displaying, digital photo frame can also be used to carrying out video image decoding and shows, compressed video format commonly used is MPEG4, also has MPEG1, MPEG2, VC-1, RM, AVS.With MPEG4 is example, the decoding and displaying basic procedure and the JPEG of video image are similar, and main difference is that its decompression step is except that entropy decoding, counter-scanning, inverse transformation, anti-DCT, also comprise inter motion compensation, reconstruction, also may comprise compensation and block elimination filtering in the frame.
Except that picture decoding showed, digital photo frame can also carry out audio decoder and broadcast.Compressed audio format commonly used has MP3, MPEGAAC, AC3 etc.The audio frequency that decompresses becomes simulated audio signal output through digital-to-analogue conversion, plays in loud speaker.
Below roughly introduce the 26S Proteasome Structure and Function of main body circuit, introduced power module 04 among the utility model embodiment, inductor 01 and Power Management Unit 02 below.
Power module 04: comprise outside input power supply and/or built-in power.
Outside input power supply can be AC power or DC power supply.When outside input ac power, need the AC/DC conversion, i.e. rectification, voltage stabilizing obtain DC power supply.
Built-in power can be common batteries group and rechargeable battery.Common batteries also claims primary cell, as: carbon zinc battery, alkaline battery, mercury battery, lithium battery.Rechargeable battery also claims secondary cell, as: Ni-Cd nickel-cadmium, nickel-hydrogen chargeable cell, lithium rechargeable batteries, lead-acid battery, solar cell.Solar battery cell mainly is made of solar panel, and solar panel can be placed on the back side of frame, and absorb solar energy and be converted to the electric energy that DPF needs, and storage.
No matter be outside input power supply and/or built-in power, all need further conversion to obtain the needed DC power supply of respectively organizing of this device, common DC power supply voltage comprises+12V, 5V, 3.3V, 1.8V, 1.2V or the like.Among Fig. 1, accessory power supply only is the circuit supply except that the main body circuit.Main power source only is used for the main body circuit supply.Power module can be to concentrate one, also can be distributed, promptly is distributed in each functional circuit.
This power module can use outside input power supply and built-in power simultaneously, when external power source is imported, uses external power source, and can be embedded rechargeable.When no external power source is imported, use the built-in power power supply.
For the described DPF of the utility model embodiment mains switch can also be set, thoroughly cut off this and install all power supplies when not needing work, this moment, main power source and accessory power supply were all closed, but solar cell is understood continuous firing and rechargeable battery is charged.
The utility model embodiment adopt passive infrared detect A (A described herein can represent human body in this article) whether close method control the electric power thus supplied of each functional circuit of DPF, whether detect the people near mainly finishing by inductor 01.
Whether inductor 01, this inductor 01 are used to respond in the scope that DPF presets has human body close, if having then testing result-" people is near signal " is sent to Power Management Unit 02.
This inductor 01 mainly comprises several sections, referring to Fig. 3: sensor unit 01A, signal processing unit 01B, comparison decision circuit 01C;
Processing such as signal processing unit 01B, the signal that sensor unit is exported amplify;
Relatively decision circuit 01C is used for signal processing unit amplifying signal and the signal threshold value of presetting being compared output " people is close " logic level index signal or " people leaves " logic level index signal.
Described transducer can use the infrared thermal release electric infrared sensor, is exactly Passive Infrared Sensor commonly used.
Can also claim Fresnel Lenses for Passive Infrared Sensor increases optical lens.The Fresnel Lenses effect has two: the one, and focussing force is about to heat and releases infrared signal refraction (reflection) on lens; Second effect is to release infrared signal be divided into several area pellucidas and dark space in the search coverage, make the mobile object that the enters search coverage heat that can change with the form of variations in temperature on Passive Infrared Sensor.By installing Fresnel Lenses additional, can improve directionality to the human body detection zone, improve sensitivity and detection, reduce false-alarm, can reach better detection effect.
Passive Infrared Sensor need be installed in different positions according to dissimilar (the adaptation places) of digital photo frame with optical lens.Usually the front of digital photo frame should be installed in, frame bottom can be installed in for the wall-hung type digital photo frame.
By regulating circuit parameter or selection adjustment Fresnel Lenses in the inductor, can select or change human body sensing distance or induction direction (zone) targetedly, adapt to the display screen or the installation application places of different size type.
Described signal processing unit 01B and comparison decision circuit 01C often are integrated in together.As BISS0001 is a transducing signal processing integrated circuit with superior performance, mixes application-specific integrated circuit (ASIC) by the digital-to-analogue that operational amplifier, voltage comparator, state controller, time of delay, timer and blocking time timer etc. constituted.
Can also delay function be set by delay circuit in the inductor, when reaching certain distance, do not export " people is close " index signal immediately as the people is close, but time-delay certain hour (as several seconds), if this moment, the people was still close, just export " people is close " index signal.Similarly, when the people when reaching certain distance, not invalid immediately " people is close " index signal, promptly do not export " people leaves " signal at once, but time-delay certain hour (as several seconds), if this moment, the people was still away from reaching certain distance, just invalid " people is close " index signal is exported " people leaves " signal.
The described inductor detection mode of the utility model embodiment is not limited to passive infrared.Also can use phonoreception should, electric field induction, passive detection such as photoinduction, and microwave, active probe modes such as active infrared, these detection modes can use separately or be used in combination with detection mode such as passive infrared.
Referring to Fig. 9, Power Management Unit 02 comprises working mode change unit 021,023 3 parts of power control unit 022 and scene state Signal Pretreatment unit.
Scene state Signal Pretreatment unit 023, be used for to the input analog signal amplify, thresholding relatively changes digital signal level into, digital circuits such as signal (numeral) signal to input latchs, edge triggering, broadening, timer counter are handled, and become and are convenient to the digital signal that working mode change unit 021 uses.
Working mode change unit 021 is used for producing one group of power saving control signal according to input signal (comprise preprocessor after output).The working mode change unit realizes that with combination sequential Digital Logical Circuits typical, it is a state machine in the digital circuit, and state machine has a plurality of states, the corresponding a kind of digital photo frame mode of operation of each state.According to input signal logical transition mode of operation.One group of power saving control signal is exported in the working mode change unit, and this group signal is subjected to mode of operation and/or input scene state signal controlling, when mode of operation and/or input signal change, and this group control signal respective change.
Power control unit 022 is used for being switched on or switched off according to power saving control signal the power supply of main body circuit general supply or partial function circuit.
Power saving control signal can also be sent in the main body circuit, in main body circuit its own power source unit, is switched on or switched off the power supply of one or more unit in the main body circuit respectively.The clock that power saving control signal can also be controlled clock, reset unit has or not or the frequency height, and various hardware reset.
Giving an example below specifies a kind of DPF electricity-saving control method of having used behind the inductor 01, referring to Fig. 4, supposes to have preset at present two kinds of mode of operations, a kind of be the pattern of quitting work (S1), a kind of be normal mode of operation (S2); Finish corresponding conversion between these two mode of operations and be respectively condition 1 to 4, if a certain moment T satisfies certain condition, then next (T+1) constantly mode of operation constantly changes accordingly.
When normal mode of operation work can be set, each functional unit of main body circuit can both receive operate as normal; When quitting work, power module stops to be each functional unit power supply of main body circuit.
Each conditional definition is as follows, and each condition is a combinational logic expression formula, " and " presentation logic and, " or " presentation logic or, " no " presentation logic is non-; Logical operation priority is followed successively by " no ", " and ", " or " from high to low.
Condition 1: Power Management Unit receives " people is near signal " that inductor sends;
Condition 2: Power Management Unit receives " people leaves signal " that inductor sends;
Condition 3: Power Management Unit receives " people is near signal " that inductor sends;
Condition 4: Power Management Unit receives " people leaves signal " that inductor sends.
For more whether human body is close, can detect apart from the situation of the different distance of DPF, for example set distance D 1 apart from DPF, distance D 2 apart from DPF is set between D1 and DPF, when the people so also exports corresponding D2 signal when the D2, Power Management Unit is according to different D1 or the D2 distance signal is selected, definition is different mode of operation.The follow-up people that will specifically introduce different distance combines with other signals near situation and selects to preset the situation of mode of operation.
In order to make the whether close situation of human body more accurate, can increase a delay unit, it is inner or outside coupled that this clock unit can be arranged on inductor.Be used under the triggering of Power Management Unit, picking up counting, and when duration is preset in arrival, notify described Power Management Unit.
The testing result that receives when Power Management Unit and testing result last time start the delay unit timing not simultaneously; If in the duration that presets, the testing result of inductor does not change, and then arrives when presetting duration, and the mode of operation of selecting to preset in conjunction with the basis of inductor testing result is carried out power-saving control to functional circuit.
In order to increase user's operability, make that the situation of DPF work is diversified more, can increase real-time clock unit 05, referring to Fig. 5, this clock unit is connected with power module with Power Management Unit, main body circuit.
Real-time clock unit 05 is used for by the time of presetting instruction being set, self-clocking, and when moment that arrival is preset, the output index signal " is timed to ";
05 time of carrying out of real-time clock unit is provided with and can carries out by button or by processor, perhaps the mode that receives by remote control.The time precision that presets can be set as required.
Power Management Unit can be selected the mode of operation that presets in conjunction with the inductor testing result after the notice that receives real-time clock unit 05, perhaps also can select the mode of operation that presets voluntarily according to the situation of clock unit.
Two kinds of mode of operations having only as Fig. 4 still are set, 4 kinds of conditions, the mode of operation of selecting to preset in conjunction with the inductor testing result can be following situation:
Condition 1: " people is near signal " or that Power Management Unit receives the inductor transmission " is timed to " signal;
Condition 2: Power Management Unit receives " people leaves signal " and (no (condition 1)) that inductor sends;
Condition 3: " people is near signal " or that Power Management Unit receives the inductor transmission " is timed to " signal;
Condition 4: Power Management Unit receives " people leaves signal " and (no (condition 1)) that inductor sends.
This DPF needs to be provided with a manual key switch device at least, and one road key switch signal is provided, and this signal is given Power Management Unit, can also give the main body circuit.When the key switch signal was varying level or the variation of generation level, the main body circuit can be operated in different mode of operations.As, this key switch signal is as mains switch, and when the main body circuit was not switched on, if the key switch signal changes (as by " 0 " change " 1 "), Power Management Unit was connected the main body circuit power.When the main body circuit was in running order, if the key switch signal changes (as by " 0 " change " 1 "), Power Management Unit disconnected the main body circuit power.
Other manual key switch signal can also comprise:
" mode of operation " configuration switch: this signal is given Power Management Unit, can also give the main body circuit.When " workplace " key switch signal is varying level, Power Management Unit with or the main body circuit can be operated in different mode of operations.For example: in " mode of operation " is under 1 situation, and when " people is close " was effective, display screen stopped to show after the half an hour of working; In " workplace " is under 0 situation, and when " people is close " was effective, display screen stopped to show after the half an hour of working.
Manually being provided with of key switch signal can be diversified, carries out different settings according to different needs.
Being provided with under the situation of manual key switch device, can also increase Long-distance Control mode-remote control signal reception, improve user's experience.
Referring to Fig. 6, remote control receiving element 06 is connected respectively with inductor 01, Power Management Unit 02, main body circuit 03, power module 04.
After remote control receiving element 06 receives the wireless remote control signal, induction, amplification, integer output serial remote control pulse signal;
This DPF can also comprise the start indicating member, when this unit is used for the main body circuit and does not power on, after Power Management Unit receives serial remote control pulse signal, the pulse signal string manipulation that described remote control command is included becomes single pulse signal, as power-on command, each functional circuit of main body circuit is powered on according to power-on command.
For example be in when quitting work state when the main body circuit, if remote control receiving element output remote control receives serial signal, microprocessor unit can not receive processing, trigger and receive serial signal with this remote control by the start indicating member, produce " remote control work " level index signal, when " remote control work " when level is effective, no matter whether " people is close " level is effective, all be transformed into " operate as normal " state, connect main body circuit general supply.After the microprocessor in the main body circuit and serial/underwater acoustic remote control interface unit work, can receive serial signal to remote control and normally receive processing.When receiving the mode of operation instruction of remote control " shutdown ", can close each unit clock of main body circuit, give Power Management Unit by parallel interface output " remote-control closedown " significant level simultaneously, make " remote control work " level invalid, when " people is close " when level is invalid, be transformed into " quitting work " state, close main body circuit general supply by Power Management Unit.
Two kinds of mode of operations having only as Fig. 4 still are set, 4 kinds of conditions, the mode of operation of selecting to preset in conjunction with the testing result of two kinds of different distance of inductor can be following situation:
Condition 1: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 2: Power Management Unit receives " people leaves D1 " and (no (condition 1)) that inductor sends;
Condition 3: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 4: Power Management Unit receives " people leaves D1 " and (no (condition 1)) that inductor sends.
Be mainly the situation of in-line power in conjunction with the application mode of DPF, the described DPF of the utility model embodiment can also increase by first monitoring means on above-mentioned basis, whether be externally fed, and the result is sent to Power Management Unit if being used to monitor described DPF.
After Power Management Unit received the externally fed index signal, the mode of operation of selecting to preset was that main body circuit all functions circuit is powered according to rated power, for example can be the power supply that keeps the main body circuit basic function circuit except that display screen.
And this first monitoring means can also further be monitored the built-in power dump energy when monitoring in-line power, and monitoring result is sent to Power Management Unit; Power Management Unit is carried out power-saving control in conjunction with the mode of operation that the inductor monitoring result is selected to preset to each functional circuit according to the built-in power electric quantity monitoring result who receives.
In conjunction with the various control signal, the working condition that the more work pattern is controlled the main body circuit can be set, reach purpose of power saving.Three kinds of mode of operations for example can be set be the Mode S 1 that quits work, normal mode of operation S2, dormancy mode of operation S3.Wherein S3 is for newly-increased, and he is that with the difference of normal mode of operation under the dormancy mode of operation, Power Management Unit control power module is not the display screen power supply, perhaps when display screen when demonstration is above certain hour continuously, can change S3 automatically over to, the saving electric weight.
Referring to Fig. 7, aforesaid three kinds of mode of operations can be set, produced 9 kinds of conditions thus, the mode of operation of selecting to preset in conjunction with the testing result of two kinds of different distance of inductor can be following situation:
Condition 1: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 2:(Power Management Unit receives " people leaves D1 " or " processor indication shutdown " that inductor sends) and (no (condition 1));
Condition 3:(Power Management Unit receives inductor transmission " people is near D1 " and Power Management Unit and receives " people leaves D2 " or " stream time surpasses predetermined value " that inductor sends) and (no (condition 2));
Condition 4: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 5:(no (condition 4)) and (no (condition 6));
Condition 6: " people is near D1 " or " externally fed ";
Condition 7:(no (condition 1)) and (no (condition 6));
Condition 8:(no (condition 2)) and (no (condition 3));
Condition 9:(no (condition 4)) and (no (condition 5)).
For refinement mode of operation further, select differently in occasion differently that electric power thus supplied reaches power saving ground purpose, can also increase the intensity monitor unit;
The intensity monitor unit comprises photodiode inductor and support circuit thereof.When environmental light intensity arrived predetermined threshold, output " night " index signal or other are index signal differently.The environmental light intensity signal can be given Power Management Unit and main body circuit.For example Power Management Unit " night " index signal and combination " people is close " index signal are controlled the main body circuit power, regulate parameter and display modes such as screen voltage, as contrast, brightness, color saturation, backlight etc., obtain preferable subjective display effect, and lower power consumption.
Further the main body circuit can increase by second monitoring means and system control unit, communicates by letter (as general input/output port) by mutual interface signal with Power Management Unit, cooperatively interacts, and realizes multi-level power-saving control.Second monitoring means is used for detecting the state of each unit of main body circuit except that processor unit, these unit comprise clock and reset, display screen, image decoder, memory access, communication interface etc.These states comprise whether powering up, whether clock is arranged, and whether the clock frequency height resets, and whether works live load weight grade etc.Microprocessor provides the amount of information of each functional unit power supply of control in the main body circuit to Power Management Unit in conjunction with the result who detects.System control unit is according to the work state information from Power Management Unit, and controlled by microprocessor unit, according to frame operating state and each each unit of scene state Signal Regulation main body circuit work, comprise the switching clock, change the clock frequency height, reset, start or close work, the task load is adjusted etc.And provide the switching information amount of each unit power supply of opening/closing to Power Management Unit.
Under second monitoring means ground control with the cooperation of system control unit under, operate as normal, two mode of operations of dormancy further can also be segmented.
The dormancy mode of operation is divided into two states: dormancy and deep dormancy.The difference of two patterns is: during deep dormancy, the main body circuit is except that processor unit, SDRAM and clock, reset circuit, all can not work or cut off the power supply, the phase-locked loop of clock part is closed, processor quits work, or be operated on the lower operating frequency, as be operated on the 32768Hz that RTC provides, SDRAM can keep refreshing.During the dormancy situation, processor and partial function circuit working are as can playing back music.The switching of sleep and deep sleep mainly is subject to processing the device unit controls, and the electricity that cut-offs of correlation unit provides the associated scenario status signal to Power Management Unit by processor unit, is controlled by Power Management Unit.
Normal mode of operation is divided into operate as normal and operates at full capacity.The difference of two states is: under the state of operating at full capacity, the main body circuit working is in high workload clock frequency, picture decoding, processor, display screen, SDRAM, bus system working clock frequency are in the highest, data throughput is in high level, and typical scene is JPEG, MPEG4 large-size images, high frame per second decoding and displaying; Under the normal operating conditions, the main body circuit working is in the exemplary operation clock frequency, picture decoding, processor, display screen, SDRAM, bus system working clock frequency are representative value, and data throughput is an average level, typical scene be the JPEG small-medium size, in low frame per second decoding and displaying.Operate at full capacity under the state, Power Management Unit selects control main body circuit voltage to be in high state, clock unit selects the highest clock work frequency of output to give picture decoding, processor, SDRAM, bus system, and brightness of display screen, frame per second satisfy current display format requirement.Under the normal operating conditions, Power Management Unit selects control main body circuit voltage to be in typicalness, according to concrete live load situation, the clock work frequency typical or that reduce that clock unit selects output to meet the demands is given picture decoding, processor, SDRAM, bus system, suitably turns down brightness of display screen, frame per second etc.
State transition graph presets the five kinds of mode of operations in above-mentioned ground as shown in Figure 8: operate as normal, quit work, dormancy, deep dormancy, operate at full capacity; 15 kinds of conditions of corresponding existence;
This DPF can comprise two each and every one above-described inductors, and each inductor presets different induction ranges; Perhaps described inductor is preset different induction ranges.The mode of operation of selecting to preset in conjunction with the testing result of two kinds of different distance of two inductors or inductor can be following situation:
Condition 1: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 2:(Power Management Unit receives " people leaves D1 " or " processor indication shutdown " that inductor sends) and (no (condition 1));
Condition 3:(Power Management Unit receives inductor transmission " people is near D1 " and Power Management Unit and receives " people leaves D2 " or " stream time surpasses predetermined value " that inductor sends) and (no (condition 2));
Condition 4: Power Management Unit receives " people is near D2 " that inductor sends or " has remote signal " that or " manually button start " or " is timed to ";
Condition 5:(no (condition 4)) and (no (condition 6));
Condition 6: " people is near D1 " or " externally fed ";
Condition 7:(no (condition 1)) and (no (condition 6));
Condition 8:(no (condition 2)) and (no (condition 3));
Condition 9:(no (condition 4)) and (no (condition 5));
Condition 10: " picture size * frame per second to be decoded is greater than predetermined value ";
Condition 11: " picture size * frame per second to be decoded is less than predetermined value ";
Condition 12: " picture size * frame per second to be decoded is greater than predetermined value ";
Condition 13: " variation of external interface input signal " or " externally fed ";
Condition 14: " the resting state duration surpasses set point " and " in-line power " and " not audio plays ";
Condition 15:no (condition 13).
The utility model embodiment increases inductor, be increased in whether detection has the close function of people in the DPF certain limit, make the described DPF of the utility model embodiment press close to the application mode of DPF more with respect to the power saving mode of prior art, make that the power-saving control of DPF is fine and smooth more, effectively reduced the power consumption of DPF.
Increase delay unit further and made that the people of monitoring is more accurate, fine and smooth near signal, avoided some unnecessary working mode change processes.
Further increased the real-time clock unit, manually by key control unit, remote control receiving element, first monitoring means, second monitoring means, intensity monitor unit, these functional units have all enriched the control mode of DPF greatly, on the basis of these functional units, the more work pattern can be set, further refinement the operating state of DPF, basic enterprising one go on foot and carried out power-saving control what improve user satisfaction.
The problem that the utility model embodiment mainly solves is above a kind of DPF provided by the utility model to be described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof; Simultaneously, for one of ordinary skill in the art, according to thought of the present utility model, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as restriction of the present utility model.
Claims (12)
1. a DPF is characterized in that, comprising:
The main body circuit is used to store data, described data is carried out picture decoding and shown corresponding image;
At least one inductor, whether the scope that preset in have human body, testing result is sent to Power Management Unit if being used to respond to;
Power Management Unit is obtained testing result, by the mode of operation that described testing result is selected to preset the main body circuit is carried out power-saving control;
Power subsystem is for described main body circuit, Power Management Unit and at least one inductor provide power supply.
2. DPF according to claim 1 is characterized in that, described inductor comprises:
Sensor unit comprises passive infrared sensing device and supporting drive circuit, be used for when the people near or the people leave constantly, export corresponding signal;
Signal processing unit is used for the signal of described sensor unit output is carried out processing and amplifying;
Relatively decision circuit is used for signal processing unit amplifying signal and the signal threshold value of presetting are compared, and obtains testing result, and testing result is sent to Power Management Unit.
3. DPF according to claim 1 is characterized in that, when described inductor during at least two, each inductor presets different induction ranges;
When described inductor was one, described inductor preset different induction ranges.
4. DPF according to claim 1 is characterized in that, described main body circuit comprises: microprocessor unit is used to control the collaborative work of each functional unit;
Image decoder is used to finish the rest image decoding;
Image processing and demonstration output interface unit are used for to display screen output shows signal;
Storage medium is used for storing image data;
Storage control is used to provide the interface of storage medium;
Clock unit is used to each functional unit of main body circuit that each work clock signal is provided;
Reset unit is used to each functional unit of main body circuit that each power on reset signal is provided.
5. DPF according to claim 1 is characterized in that, this DPF also comprises: the real-time clock unit;
The real-time clock unit is provided with instruction by the time of presetting, self-clocking, and when moment that arrival is preset, the output index signal;
After Power Management Unit was obtained the index signal of real-time clock unit, the mode of operation of selecting in conjunction with the basis of described inductor testing result to preset was carried out power-saving control to the main body circuit.
6. DPF according to claim 1 is characterized in that, this DPF also comprises: the wireless remote control receiving element;
The wireless remote control receiving element is used to receive the wireless remote control signal, to described wireless remote control signal respond to, amplification, shaping, output serial remote control pulse signal;
Power Management Unit receives described serial remote control pulse signal, and the mode of operation of selecting to preset in conjunction with the inductor testing result is for to carry out power-saving control to each functional circuit of main body circuit.
7. DPF according to claim 6, it is characterized in that, this DPF also comprises the start indicating member, when this unit is used for the main body circuit and does not power on, after receiving described serial remote control pulse signal, the pulse signal string manipulation that described remote control command is included becomes single pulse signal, as power-on command, according to power-on command each functional circuit of main body circuit is powered on.
8. DPF according to claim 1 is characterized in that, this DPF also comprises:
First monitoring means is used for further monitoring the built-in power dump energy, and built-in power dump energy index signal being sent to Power Management Unit monitoring described DPF when being not externally fed;
Power Management Unit, according to the built-in power electric weight index signal that receives, the mode of operation of selecting to preset in conjunction with the inductor testing result is for to carry out power-saving control to each functional circuit of main body circuit.
9. DPF according to claim 1 is characterized in that, this DPF also comprises: second monitoring means;
Second monitoring means is used to monitor the operating state of each functional circuit of described main body circuit, exports corresponding index signal;
Power Management Unit is used to receive the operating state index signal of described each functional circuit of main body circuit, and the mode of operation of selecting to preset in conjunction with the inductor testing result is for to carry out power-saving control to each functional circuit of main body circuit.
10. DPF according to claim 1 is characterized in that, this DPF also comprises: the light intensity detecting unit;
The light intensity detecting unit is used for the monitoring of environmental light intensity signal, and the light intensity signal that monitors is sent to Power Management Unit;
Power Management Unit is used for according to described light intensity signal, in conjunction with the mode of operation of selecting on the basis of inductor testing result to preset the display screen of main body circuit is regulated control.
11. DPF according to claim 1 is characterized in that, this DPF also comprises: delay unit;
Power Management Unit is used for periodically obtaining the testing result of inductor, if testing result and last time testing result not simultaneously, start the delay unit timing; If in the duration that presets, the testing result of inductor does not change, and then arrives when presetting duration, and the mode of operation of selecting to preset in conjunction with the basis of inductor testing result is carried out power-saving control to each functional circuit of main body circuit;
Delay unit is used for picking up counting under the triggering of Power Management Unit, and notifies described Power Management Unit when duration is preset in arrival.
12. DPF according to claim 1 is characterized in that, this DPF also comprises solar powered unit, and this unit is made of solar panel, absorb solar energy and be converted to the electric energy that DPF needs, and storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201422580U CN201039295Y (en) | 2007-04-19 | 2007-04-19 | A digital picture frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201422580U CN201039295Y (en) | 2007-04-19 | 2007-04-19 | A digital picture frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201039295Y true CN201039295Y (en) | 2008-03-19 |
Family
ID=39211825
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201422580U Expired - Lifetime CN201039295Y (en) | 2007-04-19 | 2007-04-19 | A digital picture frame |
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| Country | Link |
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| CN (1) | CN201039295Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010054594A1 (en) * | 2008-11-14 | 2010-05-20 | 华为终端有限公司 | Picture displaying method and device thereof |
| CN102480579A (en) * | 2010-11-19 | 2012-05-30 | 富士施乐株式会社 | Power-supply control device, image processing apparatus, power-supply control method |
| CN104091553A (en) * | 2014-06-24 | 2014-10-08 | 吕志雪 | Intelligent electronic photo frame system |
| CN104217555A (en) * | 2014-09-09 | 2014-12-17 | 广东中安合创人防科技有限公司 | Multimedia terminal control box for civil defense alarm |
| CN112731834A (en) * | 2020-12-22 | 2021-04-30 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
-
2007
- 2007-04-19 CN CNU2007201422580U patent/CN201039295Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010054594A1 (en) * | 2008-11-14 | 2010-05-20 | 华为终端有限公司 | Picture displaying method and device thereof |
| CN102480579A (en) * | 2010-11-19 | 2012-05-30 | 富士施乐株式会社 | Power-supply control device, image processing apparatus, power-supply control method |
| CN102480579B (en) * | 2010-11-19 | 2016-08-10 | 富士施乐株式会社 | Power supply control apparatus, image processing equipment and method for controlling power supply |
| CN104091553A (en) * | 2014-06-24 | 2014-10-08 | 吕志雪 | Intelligent electronic photo frame system |
| CN104217555A (en) * | 2014-09-09 | 2014-12-17 | 广东中安合创人防科技有限公司 | Multimedia terminal control box for civil defense alarm |
| CN112731834A (en) * | 2020-12-22 | 2021-04-30 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
| CN112731834B (en) * | 2020-12-22 | 2022-07-01 | 重庆德科电子仪表有限公司 | System and method for low-power-consumption driving of indicator lamp of full-segment code instrument |
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