TWI415050B - Ultra-low power display control circuit and associated methed - Google Patents

Ultra-low power display control circuit and associated methed Download PDF

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Publication number
TWI415050B
TWI415050B TW097136108A TW97136108A TWI415050B TW I415050 B TWI415050 B TW I415050B TW 097136108 A TW097136108 A TW 097136108A TW 97136108 A TW97136108 A TW 97136108A TW I415050 B TWI415050 B TW I415050B
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Taiwan
Prior art keywords
voltage
controller
display control
power consumption
low power
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TW097136108A
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Chinese (zh)
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TW201013612A (en
Inventor
Guo Kiang Hung
Song Yi Lin
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Mstar Semiconductor Inc
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Priority to TW097136108A priority Critical patent/TWI415050B/en
Priority to US12/556,702 priority patent/US8654113B2/en
Priority to EP09011950.4A priority patent/EP2175550B1/en
Priority to EP09011952A priority patent/EP2166822A3/en
Priority to EP09011951.2A priority patent/EP2166821B1/en
Priority to KR1020090088634A priority patent/KR101054166B1/en
Publication of TW201013612A publication Critical patent/TW201013612A/en
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Publication of TWI415050B publication Critical patent/TWI415050B/en

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
    • H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G09G2330/022—Power management, e.g. power saving in absence of operation, e.g. no data being entered during a predetermined time
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0006—Arrangements for supplying an adequate voltage to the control circuit of converters
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M1/00—Details of apparatus for conversion
    • H02M1/0003—Details of control, feedback or regulation circuits
    • H02M1/0032—Control circuits allowing low power mode operation, e.g. in standby mode
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)
  • Dc-Dc Converters (AREA)

Abstract

PURPOSE: An ultra low power display control circuit and a control method thereof are provided to provide an ultra low power circuit by controlling the combination current size of opto-coupler, thereby controlling the electric potential level of the compensation pin of a power transform controller. CONSTITUTION: A first capacitance is connected to a power transform controller. A voltage transform device is connected to the power transform controller. The voltage transform device converts a high voltage into a low voltage. A second capacitance is connected to the voltage transform device. The second capacitance stabilizes the low voltage. A regulator(550) is connected to the second capacitance. A regulator stores a low voltage and outputs a direct constant voltage. A display controller(560) is connected to the voltage transform device. The display controller stores the direct constant voltage and outputs it again. An opto-coupler(570) is connected to the display controller.

Description

極低耗電之顯示控制電路與相關方法Very low power consumption display control circuit and related method

本發明有關於顯示器之耗電，特別是有關於一種極低耗電(ultra-low power)之顯示電路與相關方法。The present invention relates to power consumption of displays, and more particularly to an extremely low-power display circuit and related methods.

第一圖顯示習知技藝之顯示器內部的顯示電路方塊圖100，包含電源電路110、縮放控制器120以及背光模組130，電源電路110經由交流電源112供電轉換成適當電壓114、116，而分別供電給背光模組130及縮放控制器120之運作。顯示電路方塊圖100可以應用於電腦監視器(monitor)、類比電視或者數位電視當中。在節能減碳的世界潮流中，眾廠商皆致力於顯示器於待機狀態下的耗電量之節省，習知技藝利用交流/直流轉換(AC/DC conversion)之電源電路110進行省電。The first figure shows a display circuit block diagram 100 inside a display of a conventional technology, including a power supply circuit 110, a zoom controller 120, and a backlight module 130. The power supply circuit 110 is converted to an appropriate voltage 114, 116 via an AC power source 112, respectively. Power is supplied to the operation of the backlight module 130 and the zoom controller 120. The display circuit block diagram 100 can be applied to a computer monitor, an analog television, or a digital television. In the world trend of energy saving and carbon reduction, all manufacturers are working on the power consumption of the display in the standby state, and the conventional technology uses the AC/DC conversion power supply circuit 110 to save power.

因此十分殷切需要發展出一套可以低成本實現的極低耗電之顯示電路與相關方法。Therefore, it is very urgent to develop a display circuit and related methods that can achieve low power consumption at low cost.

本發明提出一種極低耗電顯示控制電路，包括電源轉換控制器、偏壓電路、第一電容、變壓器、第二電容、穩 壓器以及顯示控制器；偏壓電路耦接至電源轉換控制器，用以接收高壓直流電壓並產生直流偏壓以供電電源轉換控制器；第一電容耦接至電源轉換控制器，用以穩定直流偏壓；變壓器耦接至電源轉換控制器，用以將高壓直流電壓轉換成直流電壓；第二電容耦接至變壓器，用以穩定直流電壓；低壓差線性變壓器耦接至第二電容，用以接收直流電壓並產生直流穩壓輸出；顯示控制器耦接至穩壓器，用以接收直流穩壓輸出而運作；以及光耦合元件耦接至顯示控制器與偏壓電路；顯示控制器經由GPIO腳位控制光耦合元件之耦合電流之大小，使得光耦合元件透過偏壓電路回授控制電源轉換控制器之補償腳位，而控制電源轉換控制器之運作與否。The invention provides a very low power consumption display control circuit, comprising a power conversion controller, a bias circuit, a first capacitor, a transformer, a second capacitor, and a stable a voltage converter and a display controller; the bias circuit is coupled to the power conversion controller for receiving the high voltage DC voltage and generating a DC bias voltage to supply the power conversion controller; the first capacitor is coupled to the power conversion controller for The DC bias is stabilized; the transformer is coupled to the power conversion controller for converting the high voltage DC voltage into a DC voltage; the second capacitor is coupled to the transformer for stabilizing the DC voltage; and the low dropout linear transformer is coupled to the second capacitor. The device is configured to receive a DC voltage and generate a DC regulated output; the display controller is coupled to the voltage regulator for receiving the DC regulated output; and the optical coupling component is coupled to the display controller and the bias circuit; The device controls the coupling current of the optical coupling component via the GPIO pin, so that the optical coupling component feeds back the compensation pin of the control power conversion controller through the bias circuit, and controls the operation of the power conversion controller.

本發明更提出一種極低耗電顯示控制方法，包括：感測直流電壓位準；由顯示控制器利用通用型輸入輸出腳位控制光耦合元件之耦合電流之大小，而控制電源轉換控制器之補償腳位之電位高低，以關閉電源轉換控制器之運作，舉例而言，顯示控制器藉由發動通用型輸入輸出腳位之訊號而增加光耦合元件之耦合電流之大小，或者，顯示控制器藉由將通用型輸入輸出腳位之導通接地而增加該光耦合元件之該耦合電流之大小；以及顯示控制器控制光耦合元件之耦合電流之大小，而啟動該電源轉換控制器之運作。然後，對第一電容與第二電容充電，例如充電到達一預定位準或者持續達一預定期間。The invention further provides an extremely low power consumption display control method, comprising: sensing a DC voltage level; and controlling a power conversion controller by a display controller using a general-purpose input/output pin to control a coupling current of the optical coupling element; The potential of the compensation pin is turned on to turn off the operation of the power conversion controller. For example, the display controller increases the coupling current of the optical coupling element by starting the signal of the general-purpose input/output pin, or the display controller The coupling current of the optical coupling component is increased by grounding the general-purpose input/output pin; and the display controller controls the coupling current of the optical coupling component to activate the operation of the power conversion controller. Then, the first capacitor and the second capacitor are charged, for example, the charge reaches a predetermined level or continues for a predetermined period of time.

為了使　鈞局能更進一步瞭解本發明特徵及技術內 容，請參閱以下有關本發明之詳細說明與附圖，然而所附圖式僅提供參考與說明，並非用來對本發明加以限制。In order to enable the bureau to further understand the features and technologies of the present invention. The detailed description and the accompanying drawings are to be understood as

第二圖顯示根據本發明具體實施例之極低耗電顯示控制電路300，交流電源302供應交流電壓給經過整流器310，例如80至220伏交流電壓；經過整流器310整流輸出直流電壓給偏壓電路320與變壓器(transformer)330，例如是120至375伏直流電壓，整流器310例如是全橋式整流器；經過偏壓電路320偏壓為直流電壓訊號VDDP供電給電源轉換控制器340運作，直流電壓訊號VDDP例如是20伏直流電壓，電源轉換控制器340為類比電路晶片，通常封裝為八個腳位，由於成本考量有腳位數量之限制。變壓器330利用線圈感應將其一次側之高壓直流電壓轉換成其他適當的直流電壓於二次側輸出，供其他電路運作，例如輸出直流電壓訊號VCC14V與VCC5V，分別提供14伏與5伏直流電壓，14伏直流電壓可供應背光模組之運作，例如冷陰極燈管或者發光二極體之背光模組之運作。直流電壓訊號VCC5V經過，穩壓器350，例如低壓差線性穩壓器(low drop-out regulator，簡稱LDO)350，穩壓輸出直流電壓訊號3V3而供電給縮放控制器360之運作。縮放控制器360根據變壓器330輸出之直流電壓訊號VCC5V上的電壓狀況控制電源轉換控制器340之運作，舉例而 言，將直流電壓訊號VCC5V經過電阻R5、R6之分壓訊號VCC5Vsense送進縮放控制器360之逐步逼近暫存器類比數位轉換器(successive approximation ADC，簡稱SAR ADC)偵測直流電壓訊號VCC5V上的電壓狀況，熟知此技藝人士可以了解逐步逼近暫存器類比數位轉換器是低成本可以實現的低速類比數位轉換器，或者，將分壓訊號VCC5Vsense送進縮放控制器360之一比較器(未示出)與一參考電壓，例如4伏，偵測直流電壓訊號VCC5V上的電壓狀況；然後，縮放控制器360可利用通用型輸入輸出(general purpose I/O，簡稱GPIO)腳位經過光耦合元件(opto-coupler或稱photocoupler)370控制電源轉換控制器340之補償腳位COMP，回授控制電源轉換控制器340之開啟運作時機，達到極低耗電之目的。應注意到，熟知此技藝人士可以了解電源轉換控制器340為類比電路晶片，通常封裝為八個腳位，其中補償腳位COMP於電源轉換控制器340內部提供有電流源342，例如為200微安培(μA)之電流源。偏壓電路320包括電阻R11、R12、R13、二極體D21、D22、電晶體Q1、Q2、Q3。偏壓電路320利用電阻R11、R12、電晶體Q1路徑將高壓直流電壓偏壓為直流電壓訊號VDDP供電給電源轉換控制器340運作。The second figure shows a very low power consumption display control circuit 300 in accordance with an embodiment of the present invention. The AC power source 302 supplies an AC voltage to a rectifier 310, such as an AC voltage of 80 to 220 volts; and a rectified output DC voltage through a rectifier 310 to a bias voltage. The circuit 320 and the transformer 330 are, for example, a DC voltage of 120 to 375 volts, and the rectifier 310 is, for example, a full bridge rectifier; and is biased by the bias circuit 320 to supply a DC voltage signal VDDP to the power conversion controller 340 for operation, DC. The voltage signal VDDP is, for example, a 20 volt DC voltage. The power conversion controller 340 is an analog circuit chip, and is usually packaged in eight pins, which is limited by the number of pins due to cost considerations. The transformer 330 converts the high-voltage DC voltage of the primary side into other appropriate DC voltages on the secondary side by coil induction for other circuits, for example, outputting DC voltage signals VCC14V and VCC5V, respectively providing 14 volts and 5 volts DC voltage. The 14 volt DC voltage can supply the operation of the backlight module, such as the operation of a cold cathode lamp or a backlight module of a light emitting diode. The DC voltage signal VCC5V passes through a voltage regulator 350, such as a low drop-out regulator (LDO) 350, and the regulated output DC voltage signal 3V3 is supplied to the operation of the scaling controller 360. The scaling controller 360 controls the operation of the power conversion controller 340 according to the voltage condition on the DC voltage signal VCC5V output by the transformer 330. In other words, the DC voltage signal VCC5V is sent to the scaling controller 360 through the voltage divider VCC5Vsense of the resistors R5 and R6. The progressive approximation ADC (SAR ADC) detects the DC voltage signal VCC5V. Voltage conditions, those skilled in the art can understand that the progressive approximation register analog digital converter is a low-cost analog-to-digital converter that can be realized at a low cost, or the voltage-divided signal VCC5Vsense is sent to a comparator of the scaling controller 360 (not shown) And a reference voltage, for example 4 volts, to detect the voltage condition on the DC voltage signal VCC5V; then, the scaling controller 360 can utilize the general purpose input/output (GPIO) pin through the optical coupling element (opto-coupler or photocoupler) 370 controls the compensation pin COMP of the power conversion controller 340, and feedbacks the operation timing of the power conversion controller 340 to achieve extremely low power consumption. It should be noted that those skilled in the art will appreciate that the power conversion controller 340 is an analog circuit chip, typically packaged in eight pins, wherein the compensation pin COMP is provided with a current source 342 inside the power conversion controller 340, for example, 200 micro. Ampere (μA) current source. The bias circuit 320 includes resistors R11, R12, R13, diodes D21, D22, and transistors Q1, Q2, Q3. The bias circuit 320 uses the resistors R11, R12 and the transistor Q1 path to bias the high voltage DC voltage to the DC voltage signal VDDP to supply power to the power conversion controller 340.

電源轉換控制器340利用電容器C1所儲存的電荷，於電晶體Q1關閉而停止供電時，可以短暫供應電源轉換控制器340之運作，但是，熟知此技藝人士可以了解電容器C1亦關係到電源啟動時，真正開始供應正常直流電壓 運作所需要的時間，所以電容器C1也不能太大，例如為22微法拉(μF)。而縮放控制器360則可以利用電容器C2，於切斷電源時，可以短暫供應縮放控制器360之運作，典型地電容器C2相當大，例如為2000微法拉(μF)，應注意到電容器C2可提供的儲存電力遠較電容器C1大。The power conversion controller 340 utilizes the charge stored by the capacitor C1 to temporarily supply the operation of the power conversion controller 340 when the transistor Q1 is turned off to stop the power supply. However, those skilled in the art can understand that the capacitor C1 is also related to the power source startup. , really start to supply normal DC voltage The time required for operation, so the capacitor C1 should not be too large, for example 22 microfarads (μF). The zoom controller 360 can utilize the capacitor C2. When the power is turned off, the operation of the zoom controller 360 can be temporarily supplied. Typically, the capacitor C2 is relatively large, for example, 2000 microfarads (μF), and it should be noted that the capacitor C2 can provide The stored power is much larger than the capacitor C1.

第二圖所顯示之極低耗電顯示控制電路300，在關閉系統電源後，利用電容器C2短暫供電於縮放控制器360之運作，經過穩壓器350穩壓輸出直流電壓訊號3V3而供電給縮放控制器360之運作，只要直流電壓訊號VCC5V經過穩壓器350穩壓輸出之直流電壓訊號3V3高於縮放控制器360之工作電壓之狀況下，皆可運作縮放控制器360，穩壓器350之耗電量極低，並使得直流電壓訊號VCC5V與直流電壓訊號3V3間之電壓降LDODrop極小。假設縮放控制器360之工作電壓為3.3伏，經由電容器C2之逐漸放電，只要直流電壓訊號VCC5V超過(3.3伏＋LDODrop)，皆可使縮放控制器360運作。The extremely low power consumption display control circuit 300 shown in the second figure, after the system power is turned off, is temporarily powered by the capacitor C2 to operate the scaling controller 360, and is regulated by the regulator 350 to output a DC voltage signal 3V3 to supply power to the zoom. The operation of the controller 360 can operate the scaling controller 360 and the voltage regulator 350 as long as the DC voltage signal VCC5V is regulated by the regulator 350 and the DC voltage signal 3V3 is higher than the operating voltage of the scaling controller 360. The power consumption is extremely low, and the voltage drop LDODrop between the DC voltage signal VCC5V and the DC voltage signal 3V3 is extremely small. Assuming that the operating voltage of the scaling controller 360 is 3.3 volts, the gradual discharge via the capacitor C2 allows the scaling controller 360 to operate as long as the DC voltage signal VCC5V exceeds (3.3 volts + LDODrop).

在關閉系統電源後，縮放控制器360利用GPIO腳位送出訊號AC_OFF將縮放控制器360之電壓狀態，經由電阻R4以及光耦合元件370反應給電源轉換控制器340端以汲取電流，電源轉換控制器340則利用補償腳位COMP使電流源342經由電阻R13、二極體D21、D22與電晶體Q3供應此電流，舉例而言，光耦合元件370之電流轉換比例(current transfer ration，簡稱CTR)為1:1，則光耦合元件370兩側所汲取之電流為1:1，訊號AC_OFF之發動 (assertion)期間相關於直流電壓訊號VCC5V之位準。當電源轉換控制器340於補償腳位COMP感測到縮放控制器360之電壓低於一預定位準時，短暫驅動訊號DRV以打開電晶體Q4，短暫啟動變壓器330之一次側汲取外部電源，以對電容C1充電以及對變壓器330之二次側之大電容C2充電，以供下個循環期間縮放控制器360之運作。第二圖中箭頭方向標示出幾個電路分析中的主要電流流向，使得熟知此技藝人士可以更了解本實施例之運作。After the system power is turned off, the scaling controller 360 uses the GPIO pin to send the signal AC_OFF to scale the voltage state of the controller 360, and reacts to the power conversion controller 340 via the resistor R4 and the optical coupling component 370 to draw current. The power conversion controller 340 uses the compensation pin COMP to supply the current source 342 to the current through the resistor R13, the diodes D21, D22 and the transistor Q3. For example, the current transfer ratio (CTR) of the optical coupling element 370 is 1:1, the current drawn by the two sides of the optical coupling element 370 is 1:1, and the signal AC_OFF is activated. (assertion) is related to the level of the DC voltage signal VCC5V. When the power conversion controller 340 senses that the voltage of the scaling controller 360 is lower than a predetermined level at the compensation pin COMP, the signal DRV is briefly driven to turn on the transistor Q4, and the primary side of the transformer 330 is briefly activated to extract the external power source. Capacitor C1 is charged and the large capacitor C2 on the secondary side of transformer 330 is charged for operation of scaling controller 360 during the next cycle. The direction of the arrows in the second figure indicates the main current flow in several circuit analyses, so that those skilled in the art will be more aware of the operation of this embodiment.

對於電源轉換控制器340，當發動訊號AC_OFF時，例如為高位準，光耦合元件370產生耦合電流，經由節點A、二極體D21、D22與光耦合元件370汲取所需之耦合電流，使得電晶體Q3之基極電壓下降，導通電晶體Q3與二極體D21、D22，使得補償腳位COMP上電壓下降，關閉電晶體Q2，使得電晶體Q1之基極電位下降而關閉電晶體Q1；電晶體Q3具有電流放大之作用，可以加速電流源342之放電速度，如果電源轉換控制器340內之電流源342之電流能力低，則可以省掉電晶體Q3，直接靠二極體D22進行放電。另一方面，當解除訊號AC_OFF時，例如為低位準，無感應電流產生，導通電晶體Q1而對電容C1充電，然後補償腳位COMP上電壓逐漸上升，導通電晶體Q2，使得電晶體Q1之基極接地而關閉電晶體Q1，使得電源轉換控制器340使用電容C1所儲存之電力，使得電容C1放電；因此，藉由訊號AC_OFF之發動與否控制電源轉換控制器340運作與否，以控制電容C1充電、放電循環運作。For the power conversion controller 340, when the signal AC_OFF is emitted, for example, the high level, the optical coupling element 370 generates a coupling current, and the required coupling current is extracted from the node A, the diodes D21, D22 and the optical coupling element 370, so that the power is generated. The base voltage of the crystal Q3 drops, and the conductive crystal Q3 and the diodes D21 and D22 are turned on, so that the voltage on the compensation pin COMP drops, and the transistor Q2 is turned off, so that the base potential of the transistor Q1 drops and the transistor Q1 is turned off; The crystal Q3 has a function of current amplification, which can accelerate the discharge speed of the current source 342. If the current capability of the current source 342 in the power conversion controller 340 is low, the transistor Q3 can be omitted and discharged directly by the diode D22. On the other hand, when the signal AC_OFF is released, for example, a low level, no induced current is generated, the transistor Q1 is energized to charge the capacitor C1, and then the voltage on the compensation pin COMP gradually rises, and the transistor Q2 is turned on, so that the transistor Q1 is The base is grounded to turn off the transistor Q1, so that the power conversion controller 340 uses the power stored by the capacitor C1 to discharge the capacitor C1; therefore, the power conversion controller 340 is controlled to operate or not by the signal AC_OFF. Capacitor C1 is charged and discharged in a cycle.

第三圖顯示關於第二圖之極低耗電顯示控制電路300之主要波形圖，包括訊號AC_OFF、電壓訊號VDDP、訊號DRV、電壓訊號VCC5V、感測訊號VCC5Vsense之間的波形關係圖。配合第二圖之極低耗電顯示控制電路300進行說明，於此實施例中，訊號AC_OFF拉高之後，透過二極體D21、D22與光耦合元件370快速地強迫電源轉換控制器340內之電流源342放電拉低電位並關閉電晶體Q1，強迫切斷外部電源對電源轉換控制器340之供電，且電壓訊號VDDP被快速的拉低，持續維持在0伏一段相當長的時間，達到省電的目的。訊號AC_OFF拉低之後，開啟電晶體Q1，對電容C1充電，使得電壓訊號VDDP快速上升，到達最高的電壓後，例如20伏，補償腳位COMP上電壓上升到預定位準，電源轉換控制器340短暫地發動訊號DRV，例如由電源轉換控制器340內之脈波寬度調變(pulse width modulation，簡稱PWM)控制器短暫地產生高低位準寬度調變之訊號DRV，或者由脈波頻率調變(pulse frequency modulation，簡稱PFM)控制器產生頻率不同之訊號DRV，短暫地導通電晶體Q4，使得變壓器330之一次側短暫導通對電容C1充電以及對二次側的大電容C2充電，例如將電壓訊號VCC5V快速地拉升到5伏，其可藉由與一比較器與一參考電壓比較達成，或者例如對二次側的大電容C2充電一預定期間；只要在電壓訊號VCC5V放電到預定電壓之前，縮放控制器360皆可正常運作監控感測訊號VCC5Vsense之變化，如此持續循環運 作，舉例而言，只要確保整個過程當中電壓訊號VCC5V皆大於(3.3伏＋電壓降LDODrop)，即可正常運作。感測訊號VCC5Vsense則顯示對應電壓訊號VCC5V的充放電變化。應注意到，電壓訊號VDDP持續維持在0伏一段相當長的時間，使得訊號DRV之驅動期間相隔很遠，可以完全隔絕外部電源之消耗，達到極低耗電之目的，經過電路模擬，總電力消耗約可達150毫瓦(mW)以下，而實際需要支出的額外成本甚低，兼顧成本與效能兩者之考量。本實施例中其他輔助元件之運作，例如熔絲F1、負溫係數電阻NTC、電阻R2、電容C4等等，可以為熟知此技藝人士所了解便不再贅述。The third figure shows the main waveform diagram of the extremely low power consumption display control circuit 300 of the second figure, including the waveform relationship between the signal AC_OFF, the voltage signal VDDP, the signal DRV, the voltage signal VCC5V, and the sensing signal VCC5Vsense. The low power consumption display control circuit 300 of the second figure is described. In this embodiment, after the signal AC_OFF is pulled high, the power conversion controller 340 is quickly forced through the diodes D21 and D22 and the optical coupling element 370. The current source 342 discharges the low potential and turns off the transistor Q1, forcibly cuts off the power supply of the external power source to the power conversion controller 340, and the voltage signal VDDP is rapidly pulled down, and is maintained at 0 volts for a relatively long period of time. The purpose of electricity. After the signal AC_OFF is pulled low, the transistor Q1 is turned on, and the capacitor C1 is charged, so that the voltage signal VDDP rises rapidly. After reaching the highest voltage, for example, 20 volts, the voltage on the compensation pin COMP rises to a predetermined level, and the power conversion controller 340 The signal DRV is briefly activated. For example, a pulse width modulation (PWM) controller in the power conversion controller 340 temporarily generates a high and low level modulation signal DRV, or is modulated by a pulse frequency. The pulse frequency modulation (PFM) controller generates a signal DRV with a different frequency, and briefly conducts the crystal Q4, so that the primary side of the transformer 330 is briefly turned on to charge the capacitor C1 and charge the large capacitor C2 on the secondary side, for example, the voltage. The signal VCC5V is rapidly pulled up to 5 volts, which can be achieved by comparison with a comparator and a reference voltage, or for example, charging the secondary side of the large capacitor C2 for a predetermined period; as long as the voltage signal VCC5V is discharged to a predetermined voltage The zoom controller 360 can normally operate to monitor the change of the sensing signal VCC5Vsense, thus continuously circulating For example, as long as the voltage signal VCC5V is greater than (3.3 volts + voltage drop LDODrop) during the whole process, it can operate normally. The sensing signal VCC5Vsense displays the charge and discharge changes of the corresponding voltage signal VCC5V. It should be noted that the voltage signal VDDP is continuously maintained at 0 volts for a relatively long period of time, so that the driving period of the signal DRV is far apart, the external power supply can be completely isolated, and the power consumption is extremely low. The consumption can be as low as 150 milliwatts (mW) or less, and the extra cost of actual expenditure is very low, taking into account both cost and performance considerations. The operation of other auxiliary components in this embodiment, such as fuse F1, negative temperature coefficient resistor NTC, resistor R2, capacitor C4, etc., may be omitted for those skilled in the art.

第四圖顯示根據本發明之另一具體實施例之極低耗電顯示控制電路400，相較於第二圖之實施例之差異在於偏壓電路420，利用電阻R18提供偏壓控制，並省略電晶體Q3，而最右端則顯示來自個人電腦的5伏訊號PC5V可以透過二極體D6耦接於電壓訊號VCC5V對電容C2充電；而縮放控制器360也可被廣泛整合於顯示控制器(display controller)，應用於類比電視與數位電視，並不跳脫本發明之範疇。The fourth figure shows a very low power consumption display control circuit 400 in accordance with another embodiment of the present invention. The difference from the embodiment of the second embodiment is that the bias circuit 420 provides bias control using resistor R18, and The transistor Q3 is omitted, and the 5V signal from the personal computer PC5V can be coupled to the voltage signal VCC5V through the diode D6 to charge the capacitor C2; and the zoom controller 360 can be widely integrated into the display controller ( The display controller) is applied to analog TVs and digital TVs without departing from the scope of the present invention.

第五圖顯示根據本發明之另一具體實施例之極低耗電顯示控制電路500，其主要係源自第二圖實施例之概念。類似的訊號亦採用前面訊號之標號，有助於了解本實施例之運作。主要差異在於電源轉換控制器540整合了第二圖中偏壓電路320之類似元件，而顯示控制器560直接偵側 電壓訊號VDD3V3，節省逐步逼近暫存器類比數位轉換器或者比較器之腳位；如前面實施例所揭示，由顯示控制器560偵側電壓訊號VDD3V3之變化，舉例而言，確保偵側電壓訊號VDD3V3高於3.3伏。舉例而言，在電壓訊號VDD3V3高於3.3伏前，可由顯示控制器560利用GPIO腳位發動訊號AC_OFF，經由光耦合元件570、補償腳位COMP令電源轉換控制器540停止汲取外部電源；在電壓訊號VDD3V3快落到3.3伏前，由顯示控制器560解除訊號AC_OFF，電源轉換控制器540藉由打開內部開關(未示出)經由高壓電源腳位HV由節點B短暫地汲取外部電源，使得電源轉換控制器540內部的受控電流源542，經由電壓訊號VDDp'對電容C1充電，短暫地驅動訊號DRV，啟動變壓器530之一次側，使得變壓器530對電容C1充電以及對二次側之大電容C2充電達一預定電壓或者充電一預定期間。電源轉換控制器540長時間地切斷外部電源，可以大幅降低耗電。箭頭方向標示出幾個電路分析中的主要電流流向，使得熟知此技藝人士可以更了解本實施例之運作。The fifth figure shows a very low power consumption display control circuit 500 in accordance with another embodiment of the present invention, which is primarily derived from the concepts of the second embodiment. Similar signals are also labeled with the preceding signals to help understand the operation of this embodiment. The main difference is that the power conversion controller 540 integrates similar components of the bias circuit 320 in the second figure, and the display controller 560 directly detects the side. The voltage signal VDD3V3 saves the step closer to the register analog digital converter or the comparator; as shown in the previous embodiment, the display controller 560 detects the change of the voltage signal VDD3V3, for example, ensures the detection side voltage signal. VDD3V3 is higher than 3.3 volts. For example, before the voltage signal VDD3V3 is higher than 3.3 volts, the display controller 560 can use the GPIO pin to generate the signal AC_OFF, and the power conversion controller 540 stops the external power supply via the optical coupling component 570 and the compensation pin COMP; Before the signal VDD3V3 falls to 3.3 volts, the signal AC_OFF is released by the display controller 560, and the power conversion controller 540 temporarily draws the external power from the node B via the high voltage power pin HV by turning on an internal switch (not shown), so that the power is turned on. The controlled current source 542 inside the conversion controller 540 charges the capacitor C1 via the voltage signal VDDp', and briefly drives the signal DRV to start the primary side of the transformer 530, so that the transformer 530 charges the capacitor C1 and the capacitor on the secondary side. C2 is charged to a predetermined voltage or charged for a predetermined period of time. The power conversion controller 540 cuts off the external power supply for a long time, and the power consumption can be greatly reduced. The direction of the arrows indicates the main current flow in several circuit analyses, so that those skilled in the art will be more aware of the operation of this embodiment.

根據以上諸多實施例之揭示，熟知此技藝人士可以做出許多可能變化，仍不跳脫本發明之範疇。舉例而言，顯示控制器560利用GPIO腳位控制訊號AC_OFF，經由電阻R4、光耦合元件570，回授控制補償腳位COMP，而控制電源轉換控制器540是否汲取外部電源，可以有其他變化之可能，舉例而言，可以修改光耦合元件570附近之電 路，使得訊號AC_OFF之高低位準相對於電源轉換控制器540之運作相反；或者，搭配輔助電路使得GPIO腳位間接控制光耦合元件570汲取電流之運作；或者，以上諸多實施例係由GPIO腳位輸出控制訊號AC_OFF之位準，藉由修改光耦合元件570附近之電路，可使得GPIO腳位為輸入方式運作，如第六圖所示，光耦合元件570經由電阻R72耦接於顯示控制器560之GPIO腳位，經由電晶體Q8控制是否導通放電，當控制訊號CTRL被發動，導通電晶體Q8，於訊號COMP引發電源轉換控制器540類似前述實施例之運作。Many variations are possible in light of the above-described embodiments, without departing from the scope of the invention. For example, the display controller 560 uses the GPIO pin control signal AC_OFF to feedback the control compensation pin COMP via the resistor R4 and the optical coupling component 570, and controls whether the power conversion controller 540 captures the external power supply, and may have other changes. Possible, for example, that the power in the vicinity of the optical coupling element 570 can be modified The path is such that the high and low levels of the signal AC_OFF are opposite to the operation of the power conversion controller 540; or, in conjunction with the auxiliary circuit, the GPIO pin indirectly controls the operation of the current coupling element 570 to draw current; or, the above embodiments are performed by the GPIO pin. The level of the bit output control signal AC_OFF, by modifying the circuit in the vicinity of the optical coupling element 570, allows the GPIO pin to operate in an input mode. As shown in the sixth figure, the optical coupling element 570 is coupled to the display controller via a resistor R72. The GPIO pin of 560 controls whether the conduction is turned on via the transistor Q8. When the control signal CTRL is activated, the transistor Q8 is turned on, and the signal conversion controller 540 is caused by the signal COMP to operate similarly to the foregoing embodiment.

第七圖顯示根據本發明之具體實施例之極低耗電顯示控制方法之流程圖。於步驟702，感測變壓器二次側之直流電壓位準，舉例而言，可以感測第二圖中訊號VCC5V之變化，或者直接感測訊號VDD3V3之變化，舉例而言，確保訊號VDD3V3皆高於3.3伏；於步驟704，顯示控制器藉由GPIO腳位導通光耦合元件，控制電源轉換控制器之補償腳位，而關閉電源轉換控制器之運作，舉例而言，如第五圖所示，顯示控制器560可藉由GPIO腳位發動訊號AC_OFF增加光耦合元件570之耦合電流之大小，而關閉電源轉換控制器540之運作，或者，如第六圖所示，光耦合元件570耦接於顯示控制器560之GPIO腳位，藉由電晶體Q8形成放電路徑，而關閉電源轉換控制器540之運作；於步驟706，當直流電壓位準下降到達一預定位準時，經由GPIO腳位降低光耦合元件之耦合電流之大小， 控制電源轉換控制器之補償腳位，而啟動電源轉換控制器之運作；於步驟708，短暫導通變壓器之一次側，對第一電容與第二電容短暫充電，舉例而言，如第五圖所示，藉由脈波寬度調變或者脈波頻率調變控制電晶體Q4之閘極，使得變壓器530對第一電容C1與二次側之第二電容C2充電。The seventh figure shows a flow chart of a very low power consumption display control method in accordance with an embodiment of the present invention. In step 702, the DC voltage level of the secondary side of the transformer is sensed. For example, the change of the signal VCC5V in the second figure or the change of the direct sense signal VDD3V3 can be sensed. For example, the signal VDD3V3 is high. At step 704, the display controller turns on the optical coupling component by the GPIO pin to control the compensation pin of the power conversion controller, and turns off the operation of the power conversion controller, for example, as shown in FIG. The display controller 560 can turn off the operation of the power conversion controller 540 by increasing the coupling current of the optical coupling component 570 by the GPIO pin firing signal AC_OFF, or, as shown in the sixth figure, the optical coupling component 570 is coupled. In the GPIO pin of the display controller 560, the discharge path is formed by the transistor Q8, and the operation of the power conversion controller 540 is turned off; in step 706, when the DC voltage level falls to a predetermined level, the GPIO pin is lowered. The amount of coupling current of the optical coupling element, Controlling the compensation pin of the power conversion controller to activate the operation of the power conversion controller; in step 708, briefly turning on the primary side of the transformer to temporarily charge the first capacitor and the second capacitor, for example, as shown in FIG. It is shown that the gate of the transistor Q4 is controlled by the pulse width modulation or the pulse frequency modulation, so that the transformer 530 charges the first capacitor C1 and the second capacitor C2 on the secondary side.

綜上所述，本發明揭示一種極低耗電顯示控制電路，包括電源轉換控制器、偏壓電路、第一電容、變壓器、第二電容、穩壓器以及顯示控制器；偏壓電路耦接至電源轉換控制器，用以接收高壓直流電壓並產生直流偏壓以供電電源轉換控制器；第一電容耦接至電源轉換控制器，用以穩定直流偏壓；變壓器耦接至電源轉換控制器，用以將高壓直流電壓轉換成直流電壓；第二電容耦接至變壓器，用以穩定直流電壓；低壓差線性變壓器耦接至第二電容，用以接收直流電壓並產生直流穩壓輸出；顯示控制器耦接至穩壓器，用以接收直流穩壓輸出而運作；以及光耦合元件耦接至顯示控制器與偏壓電路；顯示控制器經由GPIO腳位控制光耦合元件之耦合電流之大小，使得光耦合元件透過偏壓電路回授控制電源轉換控制器之補償腳位，而控制電源轉換控制器之運作與否。舉例而言，顯示控制器可為縮放控制器，電源轉換控制器可包含脈波寬度調變控制器或者脈波頻率調變控制器。熟習此技藝之人士可以做出其他可能變化，舉例而言，將偏壓電路之功能整合至電源轉換控制器中，則顯示控制器經由GPIO腳位控制光耦合元 件之耦合電流之大小，使得光耦合元件透直接回授控制電源轉換控制器之補償腳位，而控制電源轉換控制器之關閉或啟動，無需經由輔助的偏壓電路。或者，熟習此技藝者可以將變壓器之二次側的輸出電壓修改為3.3伏，而省略穩壓器元件，仍不跳脫本發明之發明範疇。In summary, the present invention discloses a very low power consumption display control circuit including a power conversion controller, a bias circuit, a first capacitor, a transformer, a second capacitor, a voltage regulator, and a display controller; The utility model is coupled to the power conversion controller for receiving the high voltage DC voltage and generating a DC bias voltage to supply the power conversion controller; the first capacitor is coupled to the power conversion controller for stabilizing the DC bias; and the transformer is coupled to the power conversion The controller is configured to convert the high voltage DC voltage into a DC voltage; the second capacitor is coupled to the transformer for stabilizing the DC voltage; and the low dropout linear transformer is coupled to the second capacitor for receiving the DC voltage and generating a DC regulated output. The display controller is coupled to the voltage regulator for receiving the DC regulated output to operate; and the optical coupling component is coupled to the display controller and the bias circuit; the display controller controls the coupling of the optical coupling component via the GPIO pin The magnitude of the current causes the optical coupling element to feedback the compensation pin of the power conversion controller through the bias circuit, and control whether the power conversion controller operates or not . For example, the display controller can be a zoom controller, and the power conversion controller can include a pulse width modulation controller or a pulse frequency modulation controller. Those skilled in the art can make other possible changes. For example, by integrating the functions of the bias circuit into the power conversion controller, the display controller controls the optical coupling element via the GPIO pin. The coupling current of the device is such that the optical coupling component directly feeds back the compensation pin of the control power conversion controller, and the control power conversion controller is turned off or started without an auxiliary bias circuit. Alternatively, those skilled in the art can modify the output voltage of the secondary side of the transformer to 3.3 volts, omitting the regulator components without departing from the scope of the invention.

本發明更揭示一種極低耗電顯示控制方法，包括：感測直流電壓位準；由顯示控制器利用通用型輸入輸出腳位控制光耦合元件之耦合電流之大小，而控制電源轉換控制器之補償腳位之電位高低，以關閉電源轉換控制器之運作，舉例而言，顯示控制器藉由發動(assert)通用型輸入輸出腳位之訊號而增加光耦合元件之耦合電流之大小，或者，顯示控制器藉由將通用型輸入輸出腳位之導通接地而增加該光耦合元件之該耦合電流之大小；以及顯示控制器控制光耦合元件之耦合電流之大小，啟動該電源轉換控制器之運作，舉例而言，顯示控制器藉由解除(deassert)通用型輸入輸出腳位之訊號而減少光耦合元件之耦合電流之大小，而啟動該電源轉換控制器之運作。然後，對第一電容與第二電容充電，例如充電到達一預定位準或者持續達一預定期間。The invention further discloses a very low power consumption display control method, comprising: sensing a DC voltage level; and controlling a power conversion controller by a display controller using a general-purpose input and output pin to control a coupling current of the optical coupling component; The potential of the compensation pin is turned on to turn off the operation of the power conversion controller. For example, the display controller increases the coupling current of the optical coupling element by asserting the signal of the general-purpose input/output pin, or The display controller increases the coupling current of the optical coupling component by grounding the general-purpose input/output pin; and the display controller controls the coupling current of the optical coupling component to start the operation of the power conversion controller. For example, the display controller activates the operation of the power conversion controller by deasserting the signal of the general-purpose input/output pin and reducing the coupling current of the optical coupling element. Then, the first capacitor and the second capacitor are charged, for example, the charge reaches a predetermined level or continues for a predetermined period of time.

綜上所述，雖然本發明已以較佳實施例揭露如上，然其並非用以限定本發明。任何熟習此技藝者，在不脫離本發明之精神和範圍內，當可作各種更動與潤飾，本發明之保護範圍當視後附之申請專利範圍所界定者為準。In conclusion, the present invention has been disclosed in the above preferred embodiments, and is not intended to limit the present invention. The scope of the present invention is defined by the scope of the appended claims, unless otherwise claimed.

本案圖式中所包含之各元件列示如下：The components included in the diagram of this case are listed as follows:

100‧‧‧顯示電路方塊圖100‧‧‧Display circuit block diagram

112‧‧‧交流電源112‧‧‧AC power supply

110‧‧‧電源電路110‧‧‧Power circuit

114、116‧‧‧電壓訊號114, 116‧‧‧ voltage signal

120‧‧‧縮放控制器120‧‧‧ Zoom controller

130‧‧‧背光模組130‧‧‧Backlight module

300、400、500‧‧‧顯示控制電路300, 400, 500‧‧‧ display control circuit

302‧‧‧交流電源302‧‧‧AC power supply

310‧‧‧整流器310‧‧‧Rectifier

320、420‧‧‧偏壓電路320, 420‧‧‧ bias circuit

330、530‧‧‧變壓器330, 530‧‧‧ Transformers

340、540‧‧‧電源轉換控制器340, 540‧‧‧Power Conversion Controller

342、542‧‧‧電流源342, 542‧‧‧ current source

350、550‧‧‧穩壓器350, 550‧‧ ‧ voltage regulator

360‧‧‧縮放控制器360‧‧‧Zoom controller

370、570‧‧‧光耦合元件370, 570‧‧‧ optical coupling components

560‧‧‧顯示控制器560‧‧‧ display controller

F1‧‧‧熔絲F1‧‧‧Fuse

A、B‧‧‧節點A, B‧‧‧ nodes

NTC‧‧‧電阻NTC‧‧‧ resistance

VDDP、VCC14V、VDD3V3、VCC5Vsense、COMP、HV、AC_OFF、DRV‧‧‧訊號VDDP, VCC14V, VDD3V3, VCC5Vsense, COMP, HV, AC_OFF, DRV‧‧‧ signals

R11、R12、R13、R2、R4、R5、R6、R72‧‧‧電阻R11, R12, R13, R2, R4, R5, R6, R72‧‧‧ resistors

D1、D21、D22、D3、D4、D5‧‧‧二極體D1, D21, D22, D3, D4, D5‧‧‧ diodes

Q1、Q2、Q3、Q4、Q8‧‧‧電晶體Q1, Q2, Q3, Q4, Q8‧‧‧ transistors

C1、C2、C3、C4‧‧‧電容C1, C2, C3, C4‧‧‧ capacitors

本案得藉由下列圖式及詳細說明，俾得一更深入之了解：第一圖顯示習知技藝之顯示器內部的顯示電路方塊圖。This case can be further understood by the following drawings and detailed description: The first figure shows a block diagram of the display circuit inside the display of the conventional art.

第二圖顯示根據本發明具體實施例之極低耗電顯示控制電路。The second figure shows a very low power consumption display control circuit in accordance with an embodiment of the present invention.

第三圖顯示相關於第二圖實施例之主要波形圖。The third diagram shows the main waveform diagram associated with the second embodiment.

第四圖顯示根據本發明另一具體實施例之極低耗電顯示控制電路。The fourth figure shows a very low power consumption display control circuit in accordance with another embodiment of the present invention.

第五圖顯示根據本發明另一具體實施例之極低耗電顯示控制電路。The fifth figure shows a very low power consumption display control circuit in accordance with another embodiment of the present invention.

第六圖顯示根據本發明另一具體實施例之極低耗電顯示控制電路。The sixth figure shows a very low power consumption display control circuit in accordance with another embodiment of the present invention.

第七圖顯示根據本發明之具體實施例之極低耗電顯示控制方法之流程圖。The seventh figure shows a flow chart of a very low power consumption display control method in accordance with an embodiment of the present invention.

500‧‧‧顯示控制電路500‧‧‧Display control circuit

530‧‧‧變壓器530‧‧‧Transformer

540‧‧‧電源轉換控制器540‧‧‧Power Conversion Controller

542‧‧‧電流源542‧‧‧current source

550‧‧‧穩壓器550‧‧‧ Voltage Regulator

560‧‧‧顯示控制器560‧‧‧ display controller

570‧‧‧光耦合元件570‧‧‧Optical coupling components

Q4‧‧‧電晶體Q4‧‧‧Optoelectronics

C1、C2‧‧‧電容C1, C2‧‧‧ capacitor

Claims (33)

一種極低耗電顯示控制電路，包括：一電源轉換控制器；一偏壓電路，耦接至該電源轉換控制器，用以接收一高壓直流電壓並產生一直流偏壓以供電該電源轉換控制器；一第一電容，耦接至該電源轉換控制器，用以穩定該直流偏壓；一變壓器，耦接至該電源轉換控制器，用以將該高壓直流電壓轉換成一直流電壓；一第二電容，耦接至該變壓器，用以穩定該直流電壓；一穩壓器，耦接至該第二電容，用以接收該直流電壓並產生一直流穩壓輸出；一顯示控制器，耦接至該穩壓器，用以接收該直流穩壓輸出而運作；以及一光耦合元件，耦接至該顯示控制器與該偏壓電路；其中，該顯示控制器藉由控制該光耦合元件之一耦合電流之大小，使得該光耦合元件透過該偏壓電路回授控制該電源轉換控制器之一補償腳位，以控制該電源轉換控制器之運作與否。A very low power consumption display control circuit comprising: a power conversion controller; a bias circuit coupled to the power conversion controller for receiving a high voltage DC voltage and generating a DC bias to supply the power conversion a first capacitor coupled to the power conversion controller for stabilizing the DC bias voltage; a transformer coupled to the power conversion controller for converting the high voltage DC voltage into a DC voltage; a second capacitor coupled to the transformer for stabilizing the DC voltage; a voltage regulator coupled to the second capacitor for receiving the DC voltage and generating a DC regulated output; a display controller coupled Connected to the voltage regulator for receiving the DC regulated output; and an optical coupling component coupled to the display controller and the bias circuit; wherein the display controller controls the optical coupling The coupling current of one of the components is such that the optical coupling component is controlled by the bias circuit to control one of the power conversion controllers to control the operation of the power conversion controller. 如申請專利範圍第1項所述的極低耗電顯示控制電路，其中該電源轉換控制器短暫導通一電晶體以短暫啟動該變壓器對該第一電容與該第二電容充電。The extremely low power consumption display control circuit of claim 1, wherein the power conversion controller briefly turns on a transistor to briefly activate the transformer to charge the first capacitor and the second capacitor. 如申請專利範圍第1項所述的極低耗電顯示控制電路，其中該光耦合元件耦接至該顯示控制器之一通用型輸入輸出腳位，該顯示控制器經由該通用型輸入輸出腳位控制該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control circuit of the first aspect of the invention, wherein the optical coupling component is coupled to a general-purpose input/output pin of the display controller, and the display controller is connected to the universal input and output pin The bit controls the magnitude of the coupling current of the optical coupling element. 如申請專利範圍第1項所述的極低耗電顯示控制電路，其中該穩壓器為一低壓差線性穩壓器。The extremely low power consumption display control circuit according to claim 1, wherein the voltage regulator is a low dropout linear regulator. 如申請專利範圍第1項所述的極低耗電顯示控制電路，更包含一分壓電路，耦接至該第二電容，接收該直流電壓產生一感測電壓。The extremely low power consumption display control circuit of claim 1, further comprising a voltage dividing circuit coupled to the second capacitor, receiving the DC voltage to generate a sensing voltage. 如申請專利範圍第5項所述的極低耗電顯示控制電路，其中該顯示控制器利用一逐步逼近暫存器類比數位轉換器偵測該感測電壓之電壓位準。The extremely low power consumption display control circuit of claim 5, wherein the display controller detects the voltage level of the sensing voltage by using a stepwise approximation register analog digital converter. 如申請專利範圍第5項所述的極低耗電顯示控制電路，其中該顯示控制器利用一比較器比較該感測電壓之電壓位準與一參考電壓。The extremely low power consumption display control circuit according to claim 5, wherein the display controller compares a voltage level of the sensing voltage with a reference voltage by using a comparator. 一種極低耗電顯示控制電路，包括：一電源轉換控制器；一第一電容，耦接至該電源轉換控制器；一變壓器，耦接至該電源轉換控制器，用以將一高壓直流電壓轉換成一直流電壓；一第二電容，耦接至該變壓器，用以穩定該直流電壓；一穩壓器，耦接至該第二電容，用以接收該直流電壓並產生一直流穩壓輸出；一顯示控制器，耦接至該穩壓器，用以接收該直流穩 壓輸出而運作；以及一光耦合元件，耦接至該顯示控制器；其中，該顯示控制器藉由控制該光耦合元件之一耦合電流之大小，以控制該電源轉換控制器之運作與否。An extremely low power consumption display control circuit includes: a power conversion controller; a first capacitor coupled to the power conversion controller; and a transformer coupled to the power conversion controller for transmitting a high voltage DC voltage Converting to a DC voltage; a second capacitor coupled to the transformer for stabilizing the DC voltage; a voltage regulator coupled to the second capacitor for receiving the DC voltage and generating a DC regulated output; a display controller coupled to the voltage regulator for receiving the DC stability And operating the output device; and an optical coupling component coupled to the display controller; wherein the display controller controls the operation of the power conversion controller by controlling a magnitude of a coupling current of the optical coupling component . 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該顯示控制器藉由控制該光耦合元件之該耦合電流之大小，而控制該電源轉換控制器之一補償腳位之電位高低，而控制該電源轉換控制器之關閉或啟動。The ultra-low power consumption display control circuit according to claim 8, wherein the display controller controls one of the power conversion controllers to compensate the pin position by controlling the magnitude of the coupling current of the optical coupling component. The potential is high and low, and the power conversion controller is controlled to be turned off or started. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該電源轉換控制器短暫導通一電晶體以短暫啟動該變壓器對該第一電容與該第二電容充電。The extremely low power consumption display control circuit of claim 8, wherein the power conversion controller briefly turns on a transistor to briefly activate the transformer to charge the first capacitor and the second capacitor. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該穩壓器為一低壓差線性穩壓器。The extremely low power consumption display control circuit as described in claim 8 wherein the voltage regulator is a low dropout linear regulator. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該光耦合元件耦接至該顯示控制器之一通用型輸入輸出腳位，該顯示控制器經由該通用型輸入輸出腳位控制該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control circuit of claim 8, wherein the optical coupling component is coupled to a general-purpose input/output pin of the display controller, and the display controller is connected to the universal input and output pin. The bit controls the magnitude of the coupling current of the optical coupling element. 如申請專利範圍第12項所述的極低耗電顯示控制電路，其中該顯示控制器藉由發動該通用型輸入輸出腳位之一訊號，而控制該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control circuit according to claim 12, wherein the display controller controls the coupling current of the optical coupling element by starting a signal of the general-purpose input/output pin. 如申請專利範圍第12項所述的極低耗電顯示控制電路，其中該顯示控制器藉由將該通用型輸入輸出腳位導通接地，而控制該光耦合元件之該耦合電流之大小。The extremely low power consumption display control circuit according to claim 12, wherein the display controller controls the coupling current of the optical coupling element by grounding the general-purpose input/output pin. 如申請專利範圍第8項所述的極低耗電顯示控制電 路，更包含一分壓電路，耦接至該第二電容，接收該直流電壓產生一感測電壓。Very low power consumption display control power as described in item 8 of the patent application scope The circuit further includes a voltage dividing circuit coupled to the second capacitor, and receiving the DC voltage to generate a sensing voltage. 如申請專利範圍第15項所述的極低耗電顯示控制電路，其中該顯示控制器利用一逐步逼近暫存器類比數位轉換器偵測該感測電壓之電壓位準。The extremely low power consumption display control circuit of claim 15, wherein the display controller detects the voltage level of the sensing voltage by using a stepwise approximation register analog digital converter. 如申請專利範圍第15項所述的極低耗電顯示控制電路，其中該顯示控制器利用一比較器比較該感測電壓之電壓位準與一參考電壓。The extremely low power consumption display control circuit according to claim 15, wherein the display controller compares a voltage level of the sensing voltage with a reference voltage by using a comparator. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該顯示控制器係為一縮放控制器。The extremely low power consumption display control circuit of claim 8, wherein the display controller is a zoom controller. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該電源轉換控制器包含一脈波寬度調變控制器。The extremely low power consumption display control circuit of claim 8, wherein the power conversion controller comprises a pulse width modulation controller. 如申請專利範圍第8項所述的極低耗電顯示控制電路，其中該電源轉換控制器包含一脈波頻率調變控制器。The extremely low power consumption display control circuit of claim 8, wherein the power conversion controller comprises a pulse frequency modulation controller. 一種極低耗電顯示控制電路，包括：一電源轉換控制器；一第一電容，耦接至該電源轉換控制器；一變壓器，耦接至該電源轉換控制器，用以將一高壓直流電壓轉換成一直流電壓；一第二電容，耦接至該變壓器，用以穩定該直流電壓；一顯示控制器，耦接至該第二電容，用以接收該直流電壓而運作；以及一光耦合元件，耦接至該顯示控制器；其中，該顯示控制器藉由控制該光耦合元件之一耦合 電流之大小，以控制該電源轉換控制器之之運作與否。An extremely low power consumption display control circuit includes: a power conversion controller; a first capacitor coupled to the power conversion controller; and a transformer coupled to the power conversion controller for transmitting a high voltage DC voltage Converting to a DC voltage; a second capacitor coupled to the transformer for stabilizing the DC voltage; a display controller coupled to the second capacitor for receiving the DC voltage to operate; and an optical coupling component And coupled to the display controller; wherein the display controller is coupled by controlling one of the optical coupling elements The magnitude of the current to control the operation of the power conversion controller. 如申請專利範圍第21項所述的極低耗電顯示控制電路，其中該電源轉換控制器短暫導通一電晶體以短暫啟動該變壓器對該第一電容與該第二電容充電。The extremely low power consumption display control circuit of claim 21, wherein the power conversion controller briefly turns on a transistor to briefly activate the transformer to charge the first capacitor and the second capacitor. 一種極低耗電顯示控制方法，包括：感測一直流電壓位準；藉由一顯示控制器控制一光耦合元件之一耦合電流之大小，以關閉一電源轉換控制器之運作；以及該顯示控制器控制該光耦合元件之耦合電流之大小，以啟動該電源轉換控制器之運作。A very low power consumption display control method includes: sensing a DC voltage level; controlling a magnitude of a coupling current of an optical coupling component by a display controller to turn off operation of a power conversion controller; and displaying the display The controller controls the magnitude of the coupling current of the optical coupling element to initiate operation of the power conversion controller. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該關閉該電源轉換控制器之步驟係增加該光耦合元件之耦合電流之大小。The extremely low power consumption display control method according to claim 23, wherein the step of turning off the power conversion controller increases the coupling current of the optical coupling element. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該啟動該電源轉換控制器之步驟係減少該光耦合元件之耦合電流之大小。The extremely low power consumption display control method according to claim 23, wherein the step of starting the power conversion controller reduces a magnitude of a coupling current of the optical coupling element. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該顯示控制器利用一通用型輸入輸出腳位控制該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control method according to claim 23, wherein the display controller controls the coupling current of the optical coupling element by using a general-purpose input/output pin. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該顯示控制器藉由發動一通用型輸入輸出腳位之一訊號而增加該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control method according to claim 23, wherein the display controller increases the coupling current of the optical coupling element by starting a signal of a general-purpose input/output pin. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該顯示控制器藉由將一通用型輸入輸出腳位之導 通接地而增加該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control method according to claim 23, wherein the display controller is guided by a general-purpose input and output pin The grounding is increased to increase the coupling current of the optical coupling element. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該顯示控制器藉由解除一通用型輸入輸出腳位之一訊號而減少該光耦合元件之該耦合電流之大小。The ultra-low power consumption display control method according to claim 23, wherein the display controller reduces the coupling current of the optical coupling element by releasing a signal of a general-purpose input/output pin. 如申請專利範圍第23項所述的極低耗電顯示控制方法，其中該關閉該電源轉換控制器之步驟係由該顯示控制器控制該光耦合元件之耦合電流之大小，而控制該電源轉換控制器之一補償腳位之電位高低。The ultra-low power consumption display control method according to claim 23, wherein the step of turning off the power conversion controller is to control the power conversion by controlling a magnitude of a coupling current of the optical coupling component by the display controller. One of the controllers compensates for the potential level of the pin. 如申請專利範圍第23項所述的極低耗電顯示控制方法，更包含步驟：短暫導通一變壓器之一次側，而對一第一電容與一第二電容充電。The ultra-low power consumption display control method according to claim 23, further comprising the steps of: briefly turning on a primary side of a transformer, and charging a first capacitor and a second capacitor. 如申請專利範圍第23項所述的極低耗電顯示控制方法，更包含對一第一電容與一第二電容充電直到該直流電壓位準到達一預定位準之步驟。The ultra-low power consumption display control method of claim 23, further comprising the step of charging a first capacitor and a second capacitor until the DC voltage level reaches a predetermined level. 如申請專利範圍第23項所述的極低耗電顯示控制方法，更包含對一第一電容與一第二電容充電持續達一預定期間之步驟。The ultra-low power consumption display control method of claim 23, further comprising the step of charging a first capacitor and a second capacitor for a predetermined period of time.
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