CN102103844A - Power management method - Google Patents
Power management method Download PDFInfo
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- CN102103844A CN102103844A CN2011100346966A CN201110034696A CN102103844A CN 102103844 A CN102103844 A CN 102103844A CN 2011100346966 A CN2011100346966 A CN 2011100346966A CN 201110034696 A CN201110034696 A CN 201110034696A CN 102103844 A CN102103844 A CN 102103844A
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- power supply
- sweep trace
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Abstract
The invention provides a power management method which is designed for solving the technical problem of inconvenience of power supply debugging. The method comprises the following steps: providing a plurality of driving power supplies; detecting the conditions of the driving power supplies; judging whether one or more driving power supplies in the driving power are abnormal; and executing an operation when one or more driving power supplies in the driving power are abnormal. The method has the following advantages: not only can the protection function be provided, but also the driving power supply which has fault and other abnormal conditions can be intuitively and quickly judged, i.e., the power supply is convenient to debug.
Description
Technical field
The invention relates to a kind of management method of power supply, especially about a kind of management method of driving power of LCD panel of thin-film transistor.
Background technology
Thin Film Transistor-LCD (Thin Film Transistor LCD, TFT-LCD), be meant that each the liquid crystal pixel point on the LCD all is to be driven by the thin film transistor (TFT) that is integrated in thereafter, thereby can accomplish high-speed, high brightness, high-contrast display screen information, being one of at present best LCD color display apparatus, is the main flow display device on the present Laptop ﹠ Desktop.According to the principle of TFT-LCD, TFT-LCD needs different voltage multiple power supplies to drive its circuit, promptly needs four kinds of different driving power supplys, and is as follows respectively:
Analog power (AVDD): the high voltage heavy duty, realized with booster type power supply unit (Boost) usually;
Logic power (VLogic): the low voltage heavy duty, realize with voltage-dropping type power supply unit (Buck) circuit usually;
Sweep trace positive supply (VGH): ceiling voltage underloading, common implementation are booster type charge pump (Positive Charge Pump) circuit;
Sweep trace negative supply (VGL): the negative voltage underloading is many at present with negative-pressure type charge pump (NegativeCharge Pump).
In view of this sequential control between each characteristic of four road driving powers, each road driving power and to TFT-LCD protection etc.; then need to provide power management integrated circuit (Integrated Circuits; IC) decide each road driving power operational scenario; as power management integrated circuit TPS65161 commonly used at present; it not only provides four kinds of required driving powers of the TFT-LCD display panel; defencive function also is provided, and as short circuit and overvoltage protection, and heat is shut down.But, for current power management IC, when when makeing mistakes or other abnormal case are arranged in the multichannel driving power (as, when working temperature is too high or input supply voltage cross low etc.), no matter be which road driving power is made mistakes or other abnormal case in the multichannel driving power, power management IC will close all driving powers, can not judge quickly intuitively which road driving power has and will make mistakes and other abnormal case thereby cause, and bring some inconvenience promptly for the debug of power supply.And electric power management circuit faces the situation that special pattern is difficult to follow the trail of at present.For instance: when other assembly generation product quality problems causes circuit can't balance, provide given voltage and when entering guard mode, may be because of unpredictable situations such as abnormal current cause that peripheral circuit burns.How effectively to judge and follow the trail of any road driving power still other abnormal case of makeing mistakes, become an important problem.
Summary of the invention
Technical matters solved by the invention is the inconvenience of power supply debug.
In order to solve the problems of the technologies described above, the present invention proposes a kind of method for managing power supply, this method comprises: a plurality of driving powers are provided; Detect the state of these a plurality of driving powers; Judge whether one or more driving power in these a plurality of driving powers is unusual; And when one or more driving power in these a plurality of driving powers is unusual, enter a protected mode.
Preferably, this method also comprises provides an input power supply.
Preferably, this method also comprises provides a working temperature.
Preferably, these a plurality of driving powers comprise analog power, logic power, sweep trace positive supply and sweep trace negative supply.
Preferably, when input supply voltage is lower than one first predetermined voltage or working temperature when being higher than a predetermined temperature or logic power when being lower than one second predetermined voltage, then enter one first protected mode.
Preferably, when entering first protected mode, then close whole driving powers.
Preferably, when analog power voltage is lower than one the 3rd predetermined voltage, then enter one second protected mode.
Preferably, when entering described second protected mode, then close analog power and sweep trace positive supply.
Preferably, when the sweep trace positive voltage is lower than one the 4th predetermined voltage, then enter one the 3rd protected mode.
Preferably, when entering the 3rd protected mode, then close the sweep trace positive supply.
Preferably, when the sweep trace negative supply voltage is higher than one the 5th predetermined voltage, then enter one the 4th protected mode.
Preferably, when entering the 4th protected mode, close described analog power, described sweep trace positive supply and described sweep trace negative supply.
Use the present invention not only can provide defencive function, under situation mostly, incomplete powered-down can also be judged quickly intuitively which road driving power has to make mistakes and other abnormal case, promptly is convenient to the debug of power supply.
Description of drawings
Fig. 1 illustrates the process flow diagram according to the method for managing power supply of an embodiment of the present invention;
Fig. 2 illustrates the process flow diagram according to the method for managing power supply of another embodiment of the present invention
Embodiment
Below will and describe clear explaination embodiments of the present invention in detail with accompanying drawing, for the purpose of simplifying accompanying drawing, some known habitual structures and assembly will illustrate in the mode of simple signal in the accompanying drawings.
Referring to Fig. 1, it illustrates the process flow diagram according to the method for managing power supply of an embodiment of the present invention.As shown in Figure 1, in step 110, provide a plurality of driving powers, in the present embodiment, also can provide an input power supply and a working temperature.Then, in step 120, detect the state of a plurality of driving powers.Afterwards, enter step 130, judge whether one or more driving power in a plurality of driving powers is unusual, last, in step 140, when one or more driving power in these a plurality of driving powers is unusual, enter a protected mode.
In another embodiment of the present invention, as shown in Figure 2, Fig. 2 illustrates the process flow diagram according to the method for managing power supply of another embodiment of the present invention, at first, a plurality of driving powers, input power supply and working temperature (step 210) are provided, afterwards, in step 220, detect the state of a plurality of driving powers, input power supply etc., judge afterwards whether one or more driving power in these a plurality of driving powers reaches unusually whether other abnormal case (step 230) is arranged, afterwards, if having unusually, then enter different flow processs according to different abnormal case.If when input supply voltage is lower than one first predetermined voltage or working temperature when being higher than a predetermined temperature or logic power when being lower than one second predetermined voltage (step 240), then enter first protected mode (step 242), and close whole driving power (step 244); If analog power voltage then enters one second protected mode (step 252), and closes analog power and sweep trace positive supply (step 254) when being lower than one the 3rd predetermined voltage (step 250); If the sweep trace positive voltage then enters one the 3rd protected mode (step 262) when being lower than one the 4th predetermined voltage (step 260), enter the 3rd protected mode (step 262), and close sweep trace positive supply (step 264); If the sweep trace negative supply voltage is higher than one the 5th predetermined voltage (step 270), then enters one the 4th protected mode (step 272), and close analog power, sweep trace positive supply and sweep trace negative supply (step 274).
For the present invention; can be according to the abnormal electrical power supply situation of TFT-LCD; correspondingly close driving power; thereby reach protection to TFT-LCD; in addition, because the present invention adopts for various abnormal case to close whole driving power, but make the corresponding driving power-off according to different abnormal case; thereby make and to come intuitively to judge quickly that according to the driving power of being closed which road driving power has makes mistakes or other abnormal case, promptly be convenient to the debug of power supply.
Above, describe the specific embodiment of the present invention with reference to the accompanying drawings.But those skilled in the art can understand, and under situation without departing from the spirit and scope of the present invention, can also do various changes and replacement to the specific embodiment of the present invention.These changes and replace all drop in claims of the present invention institute restricted portion.
Claims (10)
1. a method for managing power supply is characterized in that, this method comprises:
A plurality of driving powers are provided, comprise:
Analog power;
Logic power;
The sweep trace positive supply; And
The sweep trace negative supply;
Detect the state of these a plurality of driving powers;
Judge whether one or more driving power in these a plurality of driving powers is unusual; And
When one or more driving power in these a plurality of driving powers is unusual, enter a protected mode.
2. method for managing power supply according to claim 1 is characterized in that, also comprising provides an input power supply and a working temperature.
3. method for managing power supply according to claim 2; it is characterized in that; when described input supply voltage is lower than one first predetermined voltage or described working temperature when being higher than a predetermined temperature or described logic power when being lower than one second predetermined voltage, then enter one first protected mode.
4. method for managing power supply according to claim 3 is characterized in that, when entering described first protected mode, then closes described a plurality of driving power.
5. method for managing power supply according to claim 3 is characterized in that, when described analog power voltage is lower than one the 3rd predetermined voltage, then enters one second protected mode.
6. method for managing power supply according to claim 5 is characterized in that, when entering described second protected mode, then closes described analog power and described sweep trace positive supply.
7. method for managing power supply according to claim 2 is characterized in that, when described sweep trace positive voltage is lower than one the 4th predetermined voltage, then enters one the 3rd protected mode.
8. method for managing power supply according to claim 7 is characterized in that, when entering described the 3rd protected mode, then closes described sweep trace positive supply.
9. method for managing power supply according to claim 2 is characterized in that, when described sweep trace negative supply voltage is higher than one the 5th predetermined voltage, then enters one the 4th protected mode.
10. method for managing power supply according to claim 9 is characterized in that, when entering described the 4th protected mode, closes described analog power, described sweep trace positive supply and described sweep trace negative supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100346966A CN102103844A (en) | 2011-01-30 | 2011-01-30 | Power management method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100346966A CN102103844A (en) | 2011-01-30 | 2011-01-30 | Power management method |
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| CN102103844A true CN102103844A (en) | 2011-06-22 |
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Family Applications (1)
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| CN2011100346966A Pending CN102103844A (en) | 2011-01-30 | 2011-01-30 | Power management method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI558061B (en) * | 2015-11-18 | 2016-11-11 | 宏碁股份有限公司 | Power management device, power management method and electronic device |
| CN107016968A (en) * | 2016-01-27 | 2017-08-04 | 三菱电机株式会社 | Drive device and liquid crystal display device |
| CN107808645A (en) * | 2016-08-30 | 2018-03-16 | 乐金显示有限公司 | Display device and electric power monitoring circuit |
-
2011
- 2011-01-30 CN CN2011100346966A patent/CN102103844A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI558061B (en) * | 2015-11-18 | 2016-11-11 | 宏碁股份有限公司 | Power management device, power management method and electronic device |
| CN107016968A (en) * | 2016-01-27 | 2017-08-04 | 三菱电机株式会社 | Drive device and liquid crystal display device |
| US10720119B2 (en) | 2016-01-27 | 2020-07-21 | Mitsubishi Electric Corporation | Drive device and liquid crystal display apparatus |
| CN107808645A (en) * | 2016-08-30 | 2018-03-16 | 乐金显示有限公司 | Display device and electric power monitoring circuit |
| CN107808645B (en) * | 2016-08-30 | 2020-08-07 | 乐金显示有限公司 | Display device and power monitoring circuit |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20110622 |