CN101685603B - Very-low power consumption display control circuit and relative method - Google Patents
Very-low power consumption display control circuit and relative method Download PDFInfo
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- CN101685603B CN101685603B CN2008102117442A CN200810211744A CN101685603B CN 101685603 B CN101685603 B CN 101685603B CN 2008102117442 A CN2008102117442 A CN 2008102117442A CN 200810211744 A CN200810211744 A CN 200810211744A CN 101685603 B CN101685603 B CN 101685603B
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Abstract
The invention discloses a very-low power consumption display control circuit and a relative method, which can save the power consumption of a display. The very-low power consumption display control circuit comprises a power conversion controller, a bias circuit, a first capacitor, a transformer, a second capacitor, a voltage stabilizer, an optical coupling component and a display controller. The very-low power consumption display control method comprises the following steps: sensing a direct current voltage level; using the display controller to control the magnitude of a coupling current of the optical coupling component to close the operation of the power conversion controller; and using the display controller to control the magnitude of the coupling current of the optical coupling component to start the operation of the power conversion controller.
Description
Technical field
The present invention relates to the power consumption of display, relate in particular to a kind of very-low power consumption (ultra-low power) display control circuit and correlation technique.
Background technology
Fig. 1 shows display circuit square Figure 100 of prior art display interior, comprise power circuit 110, scale controller 120 and backlight module 130, power circuit 110 converts appropriate voltage 114,116 to via AC power 112 power supplies, gives the running of backlight module 130 and scale controller 120 and power respectively.Display circuit square Figure 100 can be applied in the middle of computer monitor (monitor), simulated television or the Digital Television.In the world trends of carbon reduction, many manufacturers all are devoted to the saving of the power consumption of display under holding state, and prior art utilizes the power circuit 110 of ac/dc conversion (AC/DC conversion) to carry out power saving.
Therefore very ardent needs development display circuit and the correlation technique that a cover can the low-cost very-low power consumption of realizing.
Summary of the invention
Technical matters to be solved by this invention provides a kind of very-low power consumption display control circuit and correlation technique, and it can save the power consumption of display.
In order to solve above technical matters, the invention provides following technical scheme:
The invention provides a kind of very-low power consumption display control circuit, comprise switch controller of power supply, bias circuit, first electric capacity, transformer, second electric capacity, voltage stabilizer and display controller; Bias circuit is coupled to switch controller of power supply, in order to receive high-voltage dc voltage and to produce Dc bias with the power supply switch controller of power supply; First electric capacity is coupled to switch controller of power supply, in order to the stable DC bias voltage; Transformer is coupled to switch controller of power supply, in order to convert high-voltage dc voltage to DC voltage; Second electric capacity is coupled to transformer, in order to stable DC voltage; The low pressure difference linearity transformer is coupled to second electric capacity, in order to receive DC voltage and to produce DC voltage-stabilizing output; Display controller is coupled to voltage stabilizer, operates in order to receive DC voltage-stabilizing output; And the optically-coupled assembly is coupled to display controller and bias circuit; Display controller is via the size of the couple current of GPIO pin position control optically-coupled assembly, make the optically-coupled assembly see through bias circuit and feedback the compensation pin position of control switch controller of power supply, and the running of control switch controller of power supply whether.
The present invention also provides a kind of very-low power consumption display control circuit, comprises switch controller of power supply, first electric capacity, transformer, second electric capacity, voltage stabilizer, display controller; First electric capacity is coupled to this switch controller of power supply; Transformer is coupled to this switch controller of power supply, in order to a high-voltage dc voltage is converted to a direct current voltage; Second electric capacity is coupled to this transformer, in order to stablize this DC voltage; Voltage stabilizer is coupled to this second electric capacity, in order to receive this DC voltage and to produce direct current voltage stabilizing output; Display controller is coupled to this voltage stabilizer, operates in order to receive this DC voltage-stabilizing output; And the optically-coupled assembly, be coupled to this display controller; With the running of controlling this switch controller of power supply whether display controller is by the size of a couple current of this optically-coupled assembly of control.
The present invention more provides a kind of very-low power consumption display control method, comprising: the sense current in direct voltage level; Utilize the size of the couple current of universal input and output pin position control optically-coupled assembly by display controller, and the current potential height of the compensation pin position of control switch controller of power supply, running with the powered-down switching controller, for example, display controller increases the size of the couple current of optically-coupled assembly by the signal that starts universal input and output pin position, perhaps, display controller is by the size that universal input and output pin position conducting ground connection is increased this couple current of this optically-coupled assembly; And the size of the couple current of display controller control optically-coupled assembly, and start the running of this switch controller of power supply.Then, to first electric capacity and the charging of second electric capacity, for example charging arrives a predetermined level or continues to reach a scheduled period.
Very-low power consumption display control circuit and correlation technique that the present invention adopts by the running of control switch controller of power supply, can be saved the power consumption of display, reach purpose of power saving.
Description of drawings
Fig. 1 shows the display circuit calcspar of prior art display interior.
Fig. 2 shows the very-low power consumption display control circuit according to the specific embodiment of the invention.
Fig. 3 shows the main oscillogram that is relevant to Fig. 2 embodiment.
Fig. 4 shows the very-low power consumption display control circuit of another specific embodiment according to the present invention.
Fig. 5 shows the very-low power consumption display control circuit of another specific embodiment according to the present invention.
Fig. 6 shows the very-low power consumption display control circuit of another specific embodiment according to the present invention.
Fig. 7 shows the process flow diagram according to the very-low power consumption display control method of the specific embodiment of the invention.
[primary clustering symbol description]
Each assembly that is comprised during this case is graphic lists as follows:
100 display circuit square Figure 112 AC power
110 power circuits, 114,116 voltage signals
120 scale controllers, 130 backlight modules
300,400,500 display control circuits
302 AC power, 310 rectifiers
320,420 bias circuits, 330,530 transformers
340,540 switch controller of power supply, 342,542 current sources
350,550 voltage stabilizers, 360 scale controllers
370,570 optically-coupled assemblies, 560 display controllers
F1 fuse A, B node
NTC resistance
VDDP, VCC14V, VDD3V3, VCC5Vsense, COMP, HV, AC_OFF, DRV signal
R11, R12, R13, R2, R4, R5, R6, R72 resistance
D1, D21, D22, D3, D4, D5 diode
Q1, Q2, Q3, Q4, Q8 transistor
C1, C2, C3, C4 electric capacity
Embodiment
Fig. 2 shows the very-low power consumption display control circuit 300 according to the specific embodiment of the invention, and AC power 302 supply alternating voltages are given through rectifier 310, for example 80 to 220 volts of alternating voltages; Giving bias circuit 320 and transformer (transformer) 330 through rectifier 310 rectification output dc voltages, for example is 120 to 375 volts of DC voltage, and rectifier 310 for example is a full bridge rectifier; Through bias circuit 320 bias voltages is that DC voltage signal VDDP powers to switch controller of power supply 340 runnings, DC voltage signal VDDP for example is 20 volts of DC voltage, switch controller of power supply 340 is the mimic channel chip, usually be encapsulated as eight pin positions, because cost consideration has the pin number quantitative limitation.Transformer 330 utilizes coil-induced high-voltage dc voltage with its primary side to convert other suitable DC voltage to and exports in secondary side, for other circuit running, for example output dc voltage signal VCC14V and VCC5V, 14 volts and 5 volts of DC voltage are provided respectively, 14 volts of DC voltage can be supplied the running of backlight module, for example the running of the backlight module of cold cathode fluorescent lamp or light emitting diode.DC voltage signal VCC5V process, voltage stabilizer 350, low pressure difference linear voltage regulator (lowdrop-out regulator, be called for short LDO) 350 for example, voltage stabilizing output dc voltage signal 3V3 and powering to the running of scale controller 360.Scale controller 360 is according to the running of the control of the voltage condition on the DC voltage signal VCC5V of transformer 330 outputs switch controller of power supply 340, for example, with DC voltage signal VCC5V process resistance R 5, what the dividing potential drop signal VCC5Vsense of R6 sent scale controller 360 to progressively approaches buffer analog-digital converter (successive approximation ADC, abbreviation SAR ADC) voltage condition on the detecting DC voltage signal VCC5V, know this skill personage and can understand that progressively to approach the buffer analog-digital converter be the low speed analog-digital converter that low cost can realize, perhaps, dividing potential drop signal VCC5Vsense is sent to a comparer (not shown) and a reference voltage of scale controller 360, for example 4 volts, the voltage condition on the detecting DC voltage signal VCC5V; Then, scale controller 360 can utilize universal input and output (general purposeI/O, abbreviation GPIO) the pin position is through the compensation pin position COMP of optically-coupled assembly (opto-coupler or title photocoupler) 370 control switch controller of power supply 340, the unlatching of back coupling control switch controller of power supply 340 operates opportunity, reaches the purpose of very-low power consumption.It should be noted that, knowing this skill personage can understand switch controller of power supply 340 and be the mimic channel chip, usually being encapsulated as eight pin positions, wherein compensating pin position COMP and provide current source 342 in switch controller of power supply 340 inside, for example is the current source of 200 micromicroamperes (μ A).Bias circuit 320 comprises resistance R 11, R12, R13, diode D21, D22, transistor Q1, Q2, Q3.Bias circuit 320 utilizes resistance R 11, R12, transistor Q1 path that the high-voltage dc voltage bias voltage is powered to switch controller of power supply 340 runnings for DC voltage signal VDDP.
Switch controller of power supply 340 utilizes the stored electric charge of capacitor C1, when transistor Q1 closes and stops power supply, running that can of short duration power supply switching controller 340, but, know this skill personage passable electrolysis condenser C1 when also being related to power initiation, really beginning to supply normal DC voltage and operate the needed time, so capacitor C1 can not be too big, for example is 22 microfarads (μ F).Scale controller 360 then can utilize capacitor C2, when cutting off the electricity supply, running that can of short duration supply scale controller 360, typically capacitor C2 is quite big, for example be 2000 microfarads (μ F), it should be noted that the available storage electric power of capacitor C2 is big far beyond capacitor C1.
The very-low power consumption display control circuit 300 that Fig. 2 is shown, behind the shutdown system power supply, utilize the of short duration running that is powered at scale controller 360 of capacitor C2, power to the running of scale controller 360 through voltage stabilizer 350 voltage stabilizing output dc voltage signal 3V3, as long as DC voltage signal VCC5V is higher than through the DC voltage signal 3V3 of voltage stabilizer 350 voltage stabilizings output under the situation of operating voltage of scale controller 360, all can operate scale controller 360, the power consumption of voltage stabilizer 350 is extremely low, and makes that the voltage drop LDODrop between DC voltage signal VCC5V and DC voltage signal 3V3 is minimum.The operating voltage of supposing scale controller 360 is 3.3 volts, and C2 discharges gradually via capacitor, as long as DC voltage signal VCC5V surpasses (3.3 volts+LDODrop), all can make scale controller 360 runnings.
Behind the shutdown system power supply, scale controller 360 utilizes GPIO pin position to send the voltage status of signal AC_OFF with scale controller 360, give switch controller of power supply 340 ends to draw electric current via resistance R 4 and 370 reactions of optically-coupled assembly, 340 of switch controller of power supply utilize compensation pin position COMP to make current source 342 via resistance R 13, diode D21, D22 and transistor Q3 supply this electric current, for example, the current conversion ratio of optically-coupled assembly 370 (current transfer ration, be called for short CTR) be 1:1, then the electric current that draws of optically-coupled assembly 370 both sides is 1:1, and the position that is relevant to DC voltage signal VCC5V during the starting of signal AC_OFF (assertion) is accurate.When the voltage that senses scale controller 360 in compensation pin position COMP when switch controller of power supply 340 is lower than a predetermined level, of short duration driving signal DRV is to open transistor Q4, the primary side of of short duration starting transformer 330 draws external power source, with to capacitor C 1 charging and to big capacitor C 2 chargings of the secondary side of transformer 330, for scale controller 360 the running of next cycle period.The direction of arrow indicates the main current direction in several circuit analyses among Fig. 2, makes to know the running that this skill personage can more understand present embodiment.
For switch controller of power supply 340, when mobilizing signal AC_OFF, it for example is high levels, optically-coupled assembly 370 produces couple current, draws required couple current via node A, diode D21, D22 and optically-coupled assembly 370, makes the base voltage of transistor Q3 descend, turn-on transistor Q3 and diode D21, D22, make the compensation pin position COMP drops that powers on, close transistor Q2, make the base potential of transistor Q1 descend and close transistor Q1; Transistor Q3 has the effect that electric current amplifies, and can quicken the velocity of discharge of current source 342, if the current capacity of the current source 342 in the switch controller of power supply 340 is low, then can save transistor Q3, directly discharges by diode D22.On the other hand, when removing signal AC_OFF, it for example is low level, influence electricity miscarriage is given birth to, and turn-on transistor Q1 and to capacitor C 1 charging compensates pin position COMP then and goes up voltage and rise gradually, turn-on transistor Q2, make transistor Q1 base earth and close transistor Q1, make switch controller of power supply 340 use the stored electric power of capacitor C 1, make capacitor C 1 discharge; Therefore, by signal AC_OFF whether start control switch controller of power supply 340 and whether operate, with control capacitance C1 charging, discharge cycles running.
Fig. 3 shows about the main oscillogram of the very-low power consumption display control circuit 300 of Fig. 2, comprises the waveform relationship figure between signal AC_OFF, voltage signal VDDP, signal DRV, voltage signal VCC5V, the sensing signal VCC5Vsense.Cooperate the very-low power consumption display control circuit 300 of Fig. 2 to describe, in this embodiment, after signal AC_OFF draws high, seeing through diode D21, D22 and optically-coupled assembly 370 forces current source 342 discharges in the switch controller of power supply 340 to drag down current potential and close transistor Q1 apace, force and cut off the power supply of external power source switch controller of power supply 340, and voltage signal VDDP is dragged down fast, continues to maintain 0 volt one period considerable time, reaches purpose of power saving.After signal AC_OFF drags down, turn-on transistor Q1, to capacitor C 1 charging, make voltage signal VDDP fast rise, after arriving the highest voltage, for example 20 volts, compensation pin position COMP powers on to press and is raised to predetermined level, switch controller of power supply 340 mobilizes signal DRV momently, for example by pulse wave width modulation (the pulsewidth modulation in the switch controller of power supply 340, abbreviation PWM) controller produces the signal DRV of high low level width modulation momently, perhaps by pulse wave frequency modulating (pulse frequency modulation, be called for short PFM) the different signal DRV of controller generation frequency, turn-on transistor Q4 makes the of short duration conducting of primary side of transformer 330 charge to capacitor C 1 charging and to the big capacitor C 2 of secondary side momently, for example voltage signal VCC5V is drawn high 5 volts apace, it can perhaps for example charge the scheduled periods to the big capacitor C 2 of secondary side by relatively reaching with a comparer and a reference voltage; As long as before voltage signal VCC5V discharges into predetermined voltage, but scale controller 360 is the variation of normal operation monitoring sensing signal VCC5Vsense all, so continue the circulation running, for example, as long as voltage signal VCC5V gets final product normal operation all greater than (3.3 volts+voltage drop LDODrop) in the middle of guaranteeing whole process.Sensing signal VCC5Vsense then shows the variation that discharges and recharges of corresponding voltage signal VCC5V.It should be noted that, voltage signal VDDP continues to maintain 0 volt one period considerable time, make a good distance off during the driving of signal DRV, the consumption that can completely cut off external power source fully, reach the purpose of very-low power consumption, through circuit simulation, total electricity consumes below Yue Keda 150 milliwatts (mW), and the extra cost of actual needs expenditure is very low, takes into account the consideration of cost and usefulness.The running of other accessory part in the present embodiment, for example fuse F1, negative temperature coefficient resistance NTC, resistance R 2, capacitor C 4 or the like can be understood just and repeated no more by knowing this skill personage.
Fig. 4 shows the very-low power consumption display control circuit 400 of another specific embodiment according to the present invention, difference compared to the embodiment of Fig. 2 is bias circuit 420, utilize resistance R 18 that bias voltage control is provided, and omission transistor Q3, low order end shows that then 5 volts of signal PC5V from personal computer can be coupled to voltage signal VCC5V through diode D6, to capacitor C 2 chargings; And scale controller 360 also can extensively be integrated in display controller (display controller), is applied to simulated television and Digital Television, not escape category of the present invention.
Fig. 5 shows the very-low power consumption display control circuit 500 of another specific embodiment according to the present invention, and it mainly is the notion that is derived from Fig. 2 embodiment.Similarly signal also adopts the label of front signal, helps to understand the running of present embodiment.Main difference is that switch controller of power supply 540 integrated the similar assembly of bias circuit 320 among Fig. 2, and display controller 560 is directly detectd side voltage signal VDD3V3, saves the pin position of progressively approaching buffer analog-digital converter or comparer; Embodiment discloses as the front, detects the variation of side voltage signal VDD3V3 by display controller 560, for example, guarantees to detect side voltage signal VDD3V3 and is higher than 3.3 volts.For example, before voltage signal VDD3V3 is higher than 3.3 volts, can utilize GPIO pin position to mobilize signal AC_OFF, make switch controller of power supply 540 stop to draw external power source via optically-coupled assembly 570, compensation pin position COMP by display controller 560; Before voltage signal VDD3V3 falls 3.3 volts soon, remove signal AC_OFF by display controller 560, switch controller of power supply 540 momently draws external power source via high-voltage power supply pin position HV by Node B by opening the internal switch (not shown), make the controlled current source 542 of switch controller of power supply 540 inside, via voltage signal VDDp ' capacitor C 1 is charged, drive signal DRV momently, the primary side of starting transformer 530 makes 530 pairs of capacitor C of transformer 1 charging and big capacitor C 2 chargings of secondary side are reached a predetermined voltage or charge a scheduled period.Switch controller of power supply 540 cuts off external power source for a long time, significantly Jiang Di Mao.The direction of arrow indicates the main current direction in several circuit analyses, makes to know the running that this skill personage can more understand present embodiment.
According to the announcement of above many embodiment, know this skill personage and can make many may the variation, still escape category of the present invention not.For example, display controller 560 utilizes GPIO pin position controlling signal AC_OFF, via resistance R 4, optically-coupled assembly 570, back coupling control compensation pin position COMP, and whether control switch controller of power supply 540 draws external power source, the possibility of other variation can be arranged, for example, can revise near the circuit the optically-coupled assembly 570, make that the high low level of signal AC_OFF is opposite with respect to the running of switch controller of power supply 540; Perhaps, the collocation auxiliary circuit makes GPIO pin interdigit connect the running that control optically-coupled assembly 570 draws electric current; Perhaps, more than many embodiment be accurate by the position of GPIO pin position output controlling signal AC_OFF, by near the circuit the modification optically-coupled assembly 570, can make that GPIO pin position is the input mode running, as shown in Figure 6, optically-coupled assembly 570 is coupled to the GPIO pin position of display controller 560 via resistance R 72, control via transistor Q8 whether conducting is discharged, CTRL is launched when controlling signal, and turn-on transistor Q8 causes the running of switch controller of power supply 540 similar previous embodiment in signal COMP.
Fig. 7 shows the process flow diagram according to the very-low power consumption display control method of the specific embodiment of the invention.In step 702, the DC voltage position standard of sensing Circuit Fault on Secondary Transformer, for example, can sensing Fig. 2 in the variation of signal VCC5V, the perhaps variation of direct sensing signal VDD3V3 for example, guarantees that signal VDD3V3 all is higher than 3.3 volts; In step 704, display controller is by GPIO pin position conducting optically-coupled assembly, the compensation pin position of control switch controller of power supply, and the running of powered-down switching controller, for example, as shown in Figure 5, display controller 560 can mobilize signal AC_OFF to increase the size of the couple current of optically-coupled assembly 570 by GPIO pin position, and the running of powered-down switching controller 540, perhaps, as shown in Figure 6, optically-coupled assembly 570 is coupled to the GPIO pin position of display controller 560, form discharge path by transistor Q8, and the running of powered-down switching controller 540; In step 706, descend when arriving a predetermined level when the DC voltage position is accurate, via the size of the couple current of GPIO pin potential drop low light coupling assembly, the compensation pin position of control switch controller of power supply, and start the running of switch controller of power supply; In step 708, the primary side of of short duration conducting transformer, to first electric capacity and the of short duration charging of second electric capacity, for example, as shown in Figure 5, by the gate of pulse wave width modulation or pulse wave frequency modulating oxide-semiconductor control transistors Q4, make 530 pairs first capacitor C of transformer 1 and second capacitor C 2 of secondary side charge.
In sum, the present invention discloses a kind of very-low power consumption display control circuit, comprises switch controller of power supply, bias circuit, first electric capacity, transformer, second electric capacity, voltage stabilizer and display controller; Bias circuit is coupled to switch controller of power supply, in order to receive high-voltage dc voltage and to produce Dc bias with the power supply switch controller of power supply; First electric capacity is coupled to switch controller of power supply, in order to the stable DC bias voltage; Transformer is coupled to switch controller of power supply, in order to convert high-voltage dc voltage to DC voltage; Second electric capacity is coupled to transformer, in order to stable DC voltage; The low pressure difference linearity transformer is coupled to second electric capacity, in order to receive DC voltage and to produce DC voltage-stabilizing output; Display controller is coupled to voltage stabilizer, operates in order to receive DC voltage-stabilizing output; And the optically-coupled assembly is coupled to display controller and bias circuit; Display controller is via the size of the couple current of GPIO pin position control optically-coupled assembly, make the optically-coupled assembly see through bias circuit and feedback the compensation pin position of control switch controller of power supply, and the running of control switch controller of power supply whether.For example, display controller can be scale controller, and switch controller of power supply can comprise controller of pulse width modulation or pulse wave frequency modulating controller.The personage who has the knack of this skill can make other and may change, for example, the function of bias circuit is integrated in the switch controller of power supply, then display controller is via the size of the couple current of GPIO pin position control optically-coupled assembly, make the saturating directly back coupling of optically-coupled assembly control the compensation pin position of switch controller of power supply, and closing or starting of control switch controller of power supply need not via auxiliary bias circuit.Perhaps, haveing the knack of this skill person can be revised as 3.3 volts with the output voltage of the secondary side of transformer, and omits the voltage stabilizer assembly, still escape invention category of the present invention not.
The present invention more discloses a kind of very-low power consumption display control method, comprising: the sense current in direct voltage level; Utilize the size of the couple current of universal input and output pin position control optically-coupled assembly by display controller, and the current potential height of the compensation pin position of control switch controller of power supply, running with the powered-down switching controller, for example, display controller increases the size of the couple current of optically-coupled assembly by the signal that starts (assert) universal input and output pin position, perhaps, display controller is by the size that universal input and output pin position conducting ground connection is increased this couple current of this optically-coupled assembly; And the size of the couple current of display controller control optically-coupled assembly, start the running of this switch controller of power supply, for example, display controller reduces the size of the couple current of optically-coupled assembly by the signal of removing (deassert) universal input and output pin position, and starts the running of this switch controller of power supply.Then, to first electric capacity and the charging of second electric capacity, for example charging arrives a predetermined level or continues to reach a scheduled period.
In sum, though the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Anyly have the knack of this skill person, without departing from the spirit and scope of the present invention, when doing various changes and retouching, protection scope of the present invention should be as the criterion with claim.
Claims (15)
1. very-low power consumption display control circuit is characterized in that it comprises:
One switch controller of power supply;
One bias circuit is coupled to this switch controller of power supply, in order to receive a high-voltage dc voltage and to produce a direct current bias voltage with this switch controller of power supply of powering;
One first electric capacity is coupled to this switch controller of power supply, in order to stablize this Dc bias;
One transformer is coupled to this switch controller of power supply, in order to this high-voltage dc voltage is converted to a direct current voltage;
One second electric capacity is coupled to this transformer, in order to stablize this DC voltage;
One voltage stabilizer is coupled to this second electric capacity, in order to receive this DC voltage and to produce direct current voltage stabilizing output;
One display controller is coupled to this voltage stabilizer, operates in order to receive this DC voltage-stabilizing output; And
One optically-coupled assembly is coupled to this display controller and this bias circuit;
One bleeder circuit is coupled to this second electric capacity, receives this DC voltage and produces a sensing voltage to this display controller;
Wherein, of short duration conducting one transistor of this switch controller of power supply charges to this first electric capacity and this second electric capacity with this transformer of of short duration startup, this display controller is by the size of a couple current of this optically-coupled assembly of control, make this optically-coupled assembly see through this bias circuit and feedback a compensation pin position of this switch controller of power supply of control, whether with the running of controlling this switch controller of power supply.
2. very-low power consumption display control circuit as claimed in claim 1, it is characterized in that, wherein this optically-coupled assembly is coupled to a universal input and output pin position of this display controller, and this display controller is controlled the size of this couple current of this optically-coupled assembly via this universal input and output pin position.
3. very-low power consumption display control circuit as claimed in claim 1 is characterized in that, wherein this voltage stabilizer is a low pressure difference linear voltage regulator.
4. very-low power consumption display control circuit is characterized in that it comprises:
One switch controller of power supply;
One first electric capacity is coupled to this switch controller of power supply;
One transformer is coupled to this switch controller of power supply, in order to a high-voltage dc voltage is converted to a direct current voltage;
One second electric capacity is coupled to this transformer, in order to stablize this DC voltage;
One voltage stabilizer is coupled to this second electric capacity, in order to receive this DC voltage and to produce direct current voltage stabilizing output;
One display controller is coupled to this voltage stabilizer, operates in order to receive this DC voltage-stabilizing output; And
One optically-coupled assembly is coupled to this display controller;
Wherein, of short duration conducting one transistor of this switch controller of power supply charges to this first electric capacity and this second electric capacity with this transformer of of short duration startup; This display controller is by the size of a couple current of this optically-coupled assembly of control, and with the running of controlling this switch controller of power supply whether, this display controller is directly detected the DC voltage-stabilizing output of this voltage stabilizer.
5. very-low power consumption display control circuit as claimed in claim 4, it is characterized in that, wherein this display controller is by the size of this couple current of this optically-coupled assembly of control, and control the current potential height of a compensation pin position of this switch controller of power supply, and control closing or starting of this switch controller of power supply.
6. very-low power consumption display control circuit as claimed in claim 4, it is characterized in that, wherein this optically-coupled assembly is coupled to a universal input and output pin position of this display controller, and this display controller is controlled the size of this couple current of this optically-coupled assembly via this universal input and output pin position.
7. very-low power consumption display control circuit is characterized in that it comprises:
One switch controller of power supply;
One first electric capacity is coupled to this switch controller of power supply;
One transformer is coupled to this switch controller of power supply, in order to a high-voltage dc voltage is converted to a direct current voltage;
One second electric capacity is coupled to this transformer, in order to stablize this DC voltage;
One display controller is coupled to this second electric capacity, operates in order to receive this DC voltage; And
One optically-coupled assembly is coupled to this display controller;
One bleeder circuit is coupled to this second electric capacity, receive this DC voltage and produce a sensing voltage to this display controller, or display controller is directly detected second electric capacity galvanic current pressure signal;
Wherein, wherein of short duration conducting one transistor of this switch controller of power supply charges to this first electric capacity and this second electric capacity with this transformer of of short duration startup; With the running of controlling this switch controller of power supply whether this display controller is by the size of a couple current of this optically-coupled assembly of control.
8. very-low power consumption display control method is characterized in that it comprises:
Sensing one direct current voltage level;
Control the size of a couple current of an optically-coupled assembly by a display controller, to close the running of a switch controller of power supply;
The primary side of of short duration conducting one transformer, and to one first electric capacity and the charging of one second electric capacity; And
This display controller is controlled the size of the couple current of this optically-coupled assembly, and to start the running of this switch controller of power supply, this first electric capacity is coupled to power supply and transforms controller, and this second electric capacity is coupled to Circuit Fault on Secondary Transformer.
9. very-low power consumption display control method as claimed in claim 8 is characterized in that, wherein this display controller utilizes a universal input and output pin position to control the size of this couple current of this optically-coupled assembly.
10. very-low power consumption display control method as claimed in claim 8 is characterized in that, wherein this display controller increases the size of this couple current of this optically-coupled assembly by a signal that starts a universal input and output pin position.
11. very-low power consumption display control method as claimed in claim 8 is characterized in that, wherein this display controller is by the size that a universal input and output pin position conducting ground connection is increased this couple current of this optically-coupled assembly.
12. very-low power consumption display control method as claimed in claim 8 is characterized in that, wherein this display controller reduces the size of this couple current of this optically-coupled assembly by a signal of removing a universal input and output pin position.
13. very-low power consumption display control method as claimed in claim 8, it is characterized in that, wherein this step of closing this switch controller of power supply is to be controlled the size of the couple current of this optically-coupled assembly by this display controller, and controls the current potential height of a compensation pin position of this switch controller of power supply.
14. very-low power consumption display control method as claimed in claim 8 is characterized in that, more comprises one first electric capacity and one second electric capacity are charged up to the step of the accurate arrival in this DC voltage position one predetermined level.
15. very-low power consumption display control method as claimed in claim 12 is characterized in that, more comprises the step that to one first electric capacity and one second electric capacity charging continues to reach a scheduled period.
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| TWI488170B (en) * | 2012-04-11 | 2015-06-11 | Sitronix Technology Corp | Display the drive circuit of the panel |
| CN108170192A (en) * | 2017-12-28 | 2018-06-15 | 上海传英信息技术有限公司 | A kind of low pressure difference linear voltage regulator, control method and intelligent terminal |
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| CN1119758A (en) * | 1994-08-19 | 1996-04-03 | 现代电子产业株式会社 | High energy-saving circuit of a display apparatus |
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| CN1254117A (en) * | 1998-11-12 | 2000-05-24 | Lg电子株式会社 | Energy-saving circuit of display apparatus and its method |
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| CN101685603A (en) | 2010-03-31 |
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