CN101252659B - Circuit and method for managing standby and complete machine powering of television set - Google Patents
Circuit and method for managing standby and complete machine powering of television set Download PDFInfo
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- CN101252659B CN101252659B CN2007100137362A CN200710013736A CN101252659B CN 101252659 B CN101252659 B CN 101252659B CN 2007100137362 A CN2007100137362 A CN 2007100137362A CN 200710013736 A CN200710013736 A CN 200710013736A CN 101252659 B CN101252659 B CN 101252659B
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Abstract
The invention discloses a management method for the stand-by and the complete machine electrification of a television. The method adopts the following components: a main processor which is electrified to work after the television is turned on and an auxiliary MCU chip for maintaining the electrification work during the stand-by of the television, wherein, after receiving the turn-on command signal, the auxiliary MCU chip outputs a control signal and controls the complete machine electrification work of the television, and controls the turn-on display of the display screen after a period of time delay. The delay time is equal to the running time of the built-in initialization program of the main processor. The invention simultaneously discloses a management circuit for the stand-by and the complete machine electrification of a television, through the full use of the auxiliary MCU chip charged for receiving the turn-on command in the prior television circuit, the auxiliary MCU is simultaneously used as the electrification time sequence control unit of the display screen, thereby, phenomena of screen flash and image abnormality due to the uncontrollability of the display screen during the electrification initialization of the main processor, therefore, the image output quality is effectively improved.
Description
Technical field
The invention belongs to technical field of television sets, relate to a kind of standby and complete machine powering management method and circuit of television set.
Background technology
Along with the continuous development of technology, a lot of television function become increasingly complex, and cause system for TV set more and more huger.Present television set has developed into present SOC embedded system by 4 machines several years ago, 8 machines.Present embedded system is the operation (SuSE) Linux OS mostly, so make so large-scale system standby low-power consumption very difficult, therefore, someone has proposed to increase a lower-powered secondary MCU chip outside primary processor, be responsible for when the television set standby reception, and then realize management the complete machine power supply to remote-controlled start-up signal and button starting-up signal.Adopt the circuit design mode of this major and minor processor; make the primary processor shutdown of when standby, can cutting off the power supply fully; the complete machine power supply only need provide the supply power voltage of secondary MCU chip to get final product, thereby has significantly reduced the stand-by power consumption of television set, has reached energy saving purposes.
Television set for the major and minor processor circuit design of present employing, though solved the problem of standby low-power consumption, but the deficiency that still has two aspects: the switch of one, display screen still is subjected to the control of primary processor, the embedded system of primary processor is in start-up course, two-stage BOOT is arranged usually, when BOOT1, primary processor does not also have initialization to the periphery, be uncontrollable to display screen this moment, and phenomenons such as the screen sudden strain of a muscle that brings when powering on, image abnormity are uncontrollable and can't eliminate; Two, secondary MCU chip only is responsible for when the television set standby remote-controlled start-up signal and start push button signalling being received, all the other function buttons and teleswitch are still received by primary processor and handle, like this, secondary MCU chip just is in idle state after television set works on power, waste resource and electric energy.
Summary of the invention
Goal of the invention of the present invention is to provide a kind of standby and complete machine powering management method of television set, and to solve existing television set when starting shooting, the problem of sudden strain of a muscle and image abnormity appears shielding in display screen easily.
For solving the problems of the technologies described above, the present invention is achieved by the following technical solutions:
A kind of standby of television set and complete machine powering management method, when the secondary MCU chip that maintenance works on power when television standby receives the start-up command signal, output control signals to primary processor on the one hand, work on power with other circuit except that display screen in the control television set; The control display screen start shows that the running time of described time of delay and primary processor internal initialization program is suitable after postponing certain hour on the other hand.
Store in advance described time of delay and be set in the secondary MCU chip, perhaps determine by the mode that receives the control signal that primary processor exports behind the initialize routine end of run.
In order to reduce the workload of primary processor, reduce the consumption of primary processor port resource, described secondary MCU chip receives whole remote signal or push button signalling, is transferred to described primary processor after it is resolved to the corresponding digital command signal.
The real-time clock signal of described secondary MCU chip receive clock chip output, when the current time arrives start that the user sets or unused time, output instruction signal, control television set complete machine powering work or enter holding state.
Simultaneously, the present invention has correspondingly proposed a kind of standby and complete machine powering management circuit of television set again in conjunction with said method, keeps the secondary MCU chip that works on power when comprising the primary processor that works on power behind the television startup and television standby; Wherein, the input of described secondary MCU chip receives remote control or push button signalling, the switch control end that connects television display screen by one road output wherein, after described secondary MCU chip receives start-up command, according to the running time of described primary processor internal initialization program, by its described output output instruction signal, the control display screen start shows after postponing the described time.
In the present invention, described display screen is a liquid crystal display screen, and the pwm signal output of secondary MCU chip connects the backlight illumination of described liquid crystal display screen and regulates port, and the duty of the pwm signal by changing the output of secondary MCU chip is recently realized the adjusting to the liquid crystal display screen backlight illumination.
The switch control end of described display screen is the Enable Pin of liquid crystal display screen backlight, connects the switching signal output of described secondary MCU chip.In order to improve signal waveform, eliminate shake, the switching signal output of described secondary MCU chip amplifies the Enable Pin that negater circuit connects described liquid crystal display screen backlight by the two-stage signal of being made up of two triodes, realizes the accurate control of liquid crystal display screen switch.
In order to reduce the workload of primary processor, reduce the consumption of primary processor port resource, the ADC port of described secondary MCU chip and interrupt signal input port respectively with corresponding connection of output of analogue-key signal output part with the infrared remote control receiving head piece of television set keypad, to the input push button signalling carry out analog-to-digital conversion after, after perhaps the remote signal that receives being decoded, generate the corresponding digital command signal, the UART interface by secondary MCU chip sends described primary processor to.
In order to realize the timed power on/off function of television set, the I of described secondary MCU chip
2The C bus end passes through I
2The C bus respectively with corresponding connection of bus end of primary processor and real-time timepiece chip, the backup battery end of described real-time timepiece chip connects battery, provides working power for real-time timepiece chip when the television set standby; The main power source end of described real-time timepiece chip connects the low-voltage DC source output terminal of TV set power plate, provides working power for real-time timepiece chip after television set powers on; The interrupt signal output auxiliary connection MCU chip of described real-time timepiece chip when reaching user's setting-up time, to secondary MCU chip output interrupt signal, is realized timed power on/off control by described secondary MCU chip.
For convenience of secondary MCU chip online upgrading, described secondary MCU chip is connected with the upgrade interface of television set, receives the ROMPaq in the external program memory device, to upgrade its inner software program.
Compared with prior art, advantage of the present invention and good effect are: the present invention makes full use of by the secondary MCU chip that receives start-up command when being responsible for standby in the existing TV set circuit, it is also used as the electrifying timing sequence control unit of display screen, thereby phenomenons such as the screen sudden strain of a muscle of having avoided producing owing to display screen is uncontrollable during the primary processor power-up initializing, image abnormity have effectively improved the image output quality.In addition, by described secondary MCU chip is connected with real-time timepiece chip, thereby realized the timed power on/off function of television set.
Description of drawings
Fig. 1 is the standby and the complete machine powering management functional-block diagram of television set among the present invention;
Fig. 2 is real time clock circuit catenation principle figure;
Fig. 3 is the circuit catenation principle figure of secondary MCU chip and liquid crystal display screen backlight;
Fig. 4 circuit theory diagrams that to be remote signal be connected with secondary MCU chip with push button signalling;
Fig. 5 is the pin catenation principle figure of secondary MCU chip.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is done explanation in further detail.
Television set standby system of the present invention mainly is made up of following several parts: key circuit, remote control circuit, real time clock circuit and secondary MCU chip.In original system for TV set, the control signal to display screen when push button signalling, remote signal, real-time clock and TV start all is to be connected with the primary processor of TV.And in television system of the present invention, with the button remote control of outside with regularly all see and make external interrupt signal, obtain external information by secondary MCU chip, and then the communication that is connected of realization and primary processor, its system block diagram is referring to shown in Figure 1.
Among Fig. 1, EM8624L is the primary processor that works on power behind the television startup, and Atmega48 keeps the secondary MCU chip that works on power during for television standby.Described secondary MCU chip when receiving the start-up command signal that remote controller or keypad send, output control signal, the work of control television set complete machine powering; And according to running time of described primary processor internal initialization program, the demonstration of starting shooting of output start ON signal after postponing the described time, control display screen PANEL.
Can be set in the secondary MCU chip described time of delay according to storing in advance the running time of primary processor internal initialization program, secondary MCU chip is after receiving the start-up command signal, delay time after the described time demonstration of starting shooting of output start ON signal, control display screen PANEL.Certainly, described delay time also can be determined by the control signal that the reception primary processor is exported behind the initialize routine end of run, after secondary MCU chip receives this control signal, to display screen PANEL output start ON signal.
In order to reduce the workload of primary processor, reduce the consumption of primary processor port resource, described secondary MCU chip receives whole remote signal or push button signalling, is transferred to described primary processor after it is resolved to the corresponding digital command signal.
Described secondary MCU chip is connected with real time clock circuit TIMER simultaneously, the real-time clock signal of receive clock chip output, when the current time arrived the available machine time of user's setting, real time clock circuit TIMER exported interrupt signal, control television set complete machine powering, start work; When the current time arrives the unused time of user's setting, secondary MCU chip output standby command signal, control television set complete machine enters holding state.
Secondary MCU chip ATmega48 is by its universal asynchronous serial interface UART and I
2The C bus is connected with primary processor EM8624L, transmits remote control or key command signal and other data commands after resolving.The remote signal IR of infrared remote control receiving head piece output is connected with the interrupt signal input port INTO of secondary MCU chip ATmega48, after the remote signal that receives decoded, send primary processor EM8624L to by its UART interface, the response remote signal.Outside real-time clock TIMER provides timed power on/off to interrupt for secondary MCU chip ATmega48 by its interrupt signal output INT, perhaps passes through I
2The C bus is notified the current time of secondary MCU chip ATmega48.The ADC port of the analogue-key signal output part auxiliary connection MCU chip ATmega48 of keypad KEY, the analog signal of ADC port processing keypad KEY converts digital signal to and sends primary processor EM8624L to by the UART interface.Secondary MCU chip ATmega48 connects the Update upgrade interface of television set, different like this types, different display screen PANEL, as long as secondary MCU chip ATmega48 is connected with the external program memory device, download the ROMPaq in the peripheral hardware, can realize the compatibility coupling of secondary MCU chip ATmega48 and different cassette mechanism plate circuit.
Specifically set forth the syndeton of secondary MCU chip ATmega48 and peripheral components below in conjunction with Fig. 2~Fig. 5.Among Fig. 2, real time clock circuit adopts clock chip DS1339 to realize that its bus end SDA, SCL pass through I
227,28 pin of C bus auxiliary connection MCU chip U25, and connect the 3.3V DC power supply through pull-up resistor R176, R177 respectively.Secondary MCU chip U25 passes through I
2The C bus reads the temporal information among the clock chip DS1339, for example year, month, day, week, the time, grade, realized the correlation functions such as demonstration of time, as shown in Figure 5.The backup battery end VBACKUP of clock chip DS1339 connects battery BT1, BT2, provides working power for clock chip DS1339 when the television set standby.The main power source end VCC of clock chip DS1339 connects the 3.3V low-voltage DC source output terminal 3V3_MCU of TV set power plate, provides working power for clock chip DS1339 after television set powers on.26 pin of the interrupt signal output INT auxiliary connection MCU chip U25 of described clock chip DS1339, when arriving user's setting-up time, to secondary MCU chip U25 output interrupt signal RTC_INT1, realize the correlation functions such as timed power on/off of television set by described secondary MCU chip U25.The X1 of clock chip DS1339, X2 end connects external crystal-controlled oscillation X5, and reference clock is provided.
Fig. 3 is the circuit catenation principle figure of secondary MCU chip U25 and display screen PANEL, is that example is illustrated with the liquid crystal display screen.Pwm signal output 13 pin of secondary MCU chip U25 connect the backlight illumination of liquid crystal display screen backlight and regulate port PWM, and the duty of the pwm signal by changing secondary MCU chip U25 output is recently realized the adjusting to the liquid crystal display screen backlight illumination.Pwm signal output 13 pin of described secondary MCU chip U25 amplify the Bright port that negater circuit connects described liquid crystal display screen backlight by the signal that NPN type triode Q10 and peripheral circuit thereof are formed simultaneously.
After switching signal output 10 pin of described secondary MCU chip U25 amplify the negater circuit processing by the two-stage of being made up of triode Q11, Q12, the Enable Pin EN that connects the liquid crystal display screen backlight, switching signal PBIAS can effectively improve signal waveform by twice negate, removes shake.
Secondary MCU chip U25 takes over the control of primary processor to display screen PANEL, acts on as follows:
(1) to the powering on and control more flexibly of display screen PANEL, liberated primary processor;
(2) embedded system of primary processor has two-stage BOOT in start-up course, when BOOT1, master chip does not also have initialization to the periphery, and be uncontrollable to display screen PANEL this moment, the uncontrollable and elimination of phenomenons such as the screen sudden strain of a muscle that brings when powering on, image abnormity; And use secondary MCU chip U25 to manage, whole electrifying timing sequence that can control display screen PANEL.
Secondary MCU chip U25 is after receiving start-up command, and to TV set power plate output signal PWR_ON, the control power panel works on power by its output 2 pin; And pass through its output 23 pin to liquid crystal display screen logic card output starting-up signal PPWR.
Fig. 4 circuit theory diagrams that to be remote signal be connected with secondary MCU chip U25 with push button signalling, ADC port 22 pin of button from KEY end input analog signal to secondary MCU chip U25, and connect 3.3V DC power supply 3V3_MCU through pull-up resistor R171, R172.Behind the aanalogvoltage of ADC sampling button, be quantized into digital signal, be transferred to primary processor EM8624L by UART interface 30,31 pin, thereby effectively reduce the consumption of primary processor port resource.In addition, during standby,, can wake power supply up and start working if secondary MCU chip U25 collects start button voltage.
Infrared remote-controlled signal is held 32 pin that input to secondary MCU chip U25 by 1 pin of interface J23 from IR, after secondary MCU chip U25 deciphers the remote signal that receives, is transferred to primary processor EM8624L by its UART interface 30 pin (RXD), 31 pin (TXD).Remote signal is the same with push button signalling can wake TV set power up.
After television set worked on power, secondary MCU chip U25 was start color through triode Q8 control television indicator light by the standby color conversion by its 25 pin output indicator control signal LED.
For convenience of secondary MCU chip U25 online upgrading, 15,16,17 pin of described secondary MCU chip U25 connect the upgrade interface J25 of television set, receive the ROMPaq in the external program memory device,, realize coupling with the television main central layer to upgrade its inner software program.
Energy problem in 21st century is particularly outstanding, energy savings, and the development energy-saving electric appliance is extremely urgent thing, and tv product is the indispensable household electrical appliance of every household.Along with the increase of everybody energy consciousness and sense of crisis, energy-saving electric appliance will become a main flow in the electrical equipment.The present invention has realized the modularized design to power management in the television set standby process, not only reduced power consumption, and modular design can significantly reduce the cycle of system design, also make the control of display screen, keypad, remote signal and real-time clock flexible and controllable more, also avoid simultaneously the appearance of some challenges, accelerated the Time To Market of product.
Certainly; above-mentioned explanation is not to be limitation of the present invention; the present invention also is not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also should belong to protection scope of the present invention.
Claims (11)
1. the standby of a television set and complete machine powering management method, it is characterized in that: when the secondary MCU chip that maintenance works on power when television standby receives the start-up command signal, output control signals to primary processor on the one hand, work on power with other circuit except that display screen in the control television set; The control display screen start shows that the running time of described time of delay and primary processor internal initialization program is suitable after postponing certain hour on the other hand.
2. the standby of television set according to claim 1 and complete machine powering management method is characterized in that: store in advance described time of delay and be set in the secondary MCU chip.
3. the standby of television set according to claim 1 and complete machine powering management method is characterized in that: determine by the mode of the control signal that the reception primary processor is exported behind the initialize routine end of run described time of delay.
4. the standby of television set according to claim 1 and complete machine powering management method, it is characterized in that: described secondary MCU chip receives whole remote signal or push button signalling, is transferred to described primary processor after it is resolved to the corresponding digital command signal.
5. according to the standby and the complete machine powering management method of the arbitrary described television set of claim 1-4, it is characterized in that: the real-time clock signal of described secondary MCU chip receive clock chip output, when the current time arrives start that the user sets or unused time, output instruction signal is controlled television set complete machine powering work or is entered holding state.
6. the standby of a television set and complete machine powering management circuit, keep the secondary MCU chip that works on power when comprising the primary processor that works on power behind the television startup and television standby, it is characterized in that: the input of described secondary MCU chip receives remote control or push button signalling, the switch control end that connects television display screen by one road output wherein, after described secondary MCU chip receives start-up command, after postponing certain hour, pass through its described output output instruction signal, the control display screen start shows that the running time of described time of delay and primary processor internal initialization program is suitable.
7. the standby of television set according to claim 6 and complete machine powering management circuit, it is characterized in that: the ADC port of described secondary MCU chip and interrupt signal input port respectively with corresponding connection of output of analogue-key signal output part with the infrared remote control receiving head piece of television set keypad, to the input push button signalling carry out analog-to-digital conversion after, after perhaps the remote signal that receives being decoded, generate the corresponding digital command signal, the UART interface by secondary MCU chip sends described primary processor to.
8. the standby of television set according to claim 6 and complete machine powering management circuit, it is characterized in that: described display screen is a liquid crystal display screen, the pwm signal output of secondary MCU chip connects the backlight illumination of described liquid crystal display screen and regulates port; The switch control end of described display screen is the Enable Pin of liquid crystal display screen backlight, connects the switching signal output of described secondary MCU chip.
9. the standby of television set according to claim 8 and complete machine powering management circuit is characterized in that: the switching signal output of described secondary MCU chip amplifies the Enable Pin that negater circuit connects described liquid crystal display screen backlight by the two-stage signal of being made up of two triodes.
10. the standby of television set according to claim 6 and complete machine powering management circuit is characterized in that: the I of described secondary MCU chip
2The C bus end passes through I
2The C bus respectively with corresponding connection of bus end of primary processor and real-time timepiece chip, the backup battery end of described real-time timepiece chip connects battery, provides working power for real-time timepiece chip when the television set standby; The main power source end of described real-time timepiece chip connects the low-voltage DC source output terminal of TV set power plate, provides working power for real-time timepiece chip after television set powers on; The interrupt signal output auxiliary connection MCU chip of described real-time timepiece chip when arriving user's setting-up time, to secondary MCU chip output interrupt signal, is realized timed power on/off control by described secondary MCU chip.
11. the standby of television set according to claim 6 and complete machine powering management circuit, it is characterized in that: described secondary MCU chip is connected with the upgrade interface of television set, receive the ROMPaq in the external program memory device, to upgrade its inner software program.
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