CN1869878A - Input method of video chip changable voltage - Google Patents
Input method of video chip changable voltage Download PDFInfo
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- CN1869878A CN1869878A CN 200510040164 CN200510040164A CN1869878A CN 1869878 A CN1869878 A CN 1869878A CN 200510040164 CN200510040164 CN 200510040164 CN 200510040164 A CN200510040164 A CN 200510040164A CN 1869878 A CN1869878 A CN 1869878A
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Abstract
A method for inputting variable voltage of video chip includes setting voltage value inputted to video chip to be multiple value, judging whether input voltage of video chip is on cell mode or not, judging whether input voltage is set on lowest voltage or not if input voltage is on cell mode and inputting said lowest voltage for decreasing power consumption of video chip to be minimum.
Description
Technical field
The present invention relates to the video chip changable voltage input method, this method is set at input voltage a plurality of, reaches the purpose that reduces power consumption by the input minimum voltage.Particularly under the situation of battery mode, the voltage of video chip input is set at minimum voltage in a plurality of voltages that input set, reaches the minimized purpose of consuming cells like this in battery mode.
Background technology
Below existing correlation technique is described.
Fig. 1 is the block scheme of existing computer system.
As shown in the figure, the CPU of control system, power supply 10 and video unit 50 etc. are connected to each other by bus or data line.
Wherein, include as lower device in the said power supply (power supply) 10: the AC adapter (AC adaptor) 20 of common power (Source) alternating voltage being carried out rectification; Built-in in system, the battery (battery) 30 of use accessory power supply; And the dc voltage that is connected, imports with power supply boosted or the direct current stabilizer (DC-DC converter) 40 of step-down.
Promptly, in order to obtain the required power type of system, and dispose boosting and the direct current stabilizer (DC-DC converter) 40 of step-down of power supply based on most of portable set of notebook computer (notebook PC) from power supply (source) AC adapter 20 or battery 30.
Fig. 2 is the synoptic diagram of setting according to the existing video image chip of double frequency (dual frequency) mode.
As shown in the figure, input system voltage is under the situation of battery mode, and the user sets or sets low frequency automatically in double frequency 101, starts video chip.
Usually power consumption is calculated by following mathematical expression.
Mathematical expression 1
P＝VI＝I
2R(V＝IR)
Here, exist under the situation of inductance L, replace the R value, induce inductance XL=2 π fL.
But according to above-mentioned existing double frequency power-saving method, very small of the aspect of the power consumption of saving.
Summary of the invention
Among the present invention,, be to reduce power consumption, adopt method to video chip input variable voltage when portable computer is under the portable mode (battery mode) when using.
The present invention is in the state of operational system operation, and the input voltage of video image chip can be selected by the user, and input.
To achieve these goals, the electric power minimizing method in the portable computer of video chip input variable voltage of the present invention comprised as the next stage: the phase one: set the magnitude of voltage of video chip input a plurality of; Subordinate phase: whether the input voltage of judging video chip is battery mode; Phase III: when the result who judges is the situation of battery mode, judge whether to be set at lower voltage in a plurality of voltages of input; And another stage: as the result who judges, under the situation of setting the input low voltage, the stage of input low voltage.
In addition, another embodiment of the present invention, input voltage is under the situation of battery mode, when not being voltage lower in a plurality of voltages of having set of automatic setting input, the voltage that the video chip input is set by the user.
Identical with last explanation, be suitable for dual voltage technology, in battery mode, activation graph reduces the electric power that consumes simultaneously effectively as the changeable of chip input voltage.
Description of drawings
Fig. 1 is the block scheme of existing computer system;
Fig. 2 is the synoptic diagram that the existing video image chip of double frequency (dual frequency) mode is set;
Fig. 3 is the synoptic diagram that uses dual voltage to set according to the present invention;
Fig. 4 is the power-saving method process flow diagram that uses dual voltage according to the present invention.
Embodiment
Below with reference to accompanying drawings embodiments of the invention are elaborated.
Fig. 3 is the synoptic diagram that can set dual voltage 302;
That is, under battery mode, change and be suitable for the working voltage of the video image chip that passes through the dual voltage technology of use, and then reduce the electric power that consumes.
That is, power consumption is according to P=V
2/ R=I
2The XL formula calculates, and the power consumption of voltage 302 of the present invention and traditional frequency 301 is proportional.
Fig. 4 is the process flow diagram that reduces according to the electric power that the dual voltage of the present invention is set.
With identical shown in the figure, for the video chip input voltage, the magnitude of voltage of video chip input can be set at a plurality of by the user, such as 1.05V and 1.5V (S401).
Judge system or/whether the video chip input voltage is battery mode (S402).
Above judged result, when being in battery mode, judge whether to set lower voltage 1.05V (S403) in a plurality of voltages that automatic input sets above.
Top judged result under the situation that is set at automatic input low voltage, is imported lower voltage, makes video chip operation (S404).
On the other hand, when input voltage is in battery mode, if be not in lower voltage condition in a plurality of voltages that automatic setting input set, the voltage that is set by the user to the video chip input then, and make its operation (S405,406).
In the present invention, set the voltage of setting according to user's judgement.
In addition, system is not or/and the input voltage of video chip is under the situation of battery mode, the voltage that the video chip input is set by the user, and make its operation (S407,408).
Identical with the above, the variable voltage input method of video chip of the present invention is meant that the voltage that video chip is imported is set at minimum voltage in a plurality of voltages of the setting that is transfused to, and in battery mode the electric power that consumes is reduced to minimum like this.
By above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.
Therefore, the technical scope of this invention is not limited to the content on the instructions, must determine its technical scope according to interest field.
Claims (2)
1, a kind of input method of video chip changable voltage comprised as the next stage:
Phase one: set the magnitude of voltage of video chip input a plurality of;
Subordinate phase: whether the input voltage of judging video chip is battery mode;
Phase III: when the result who judges is the situation of battery mode, judge whether to be set at lower voltage in a plurality of voltages of input;
And another stage: as the result who judges, under the situation of setting the input low voltage, the stage of input low voltage.
2, as the input method of video chip changable voltage as described in the claim item 1,
It is characterized in that: when input voltage is under the battery mode, and when the automatic setting of lower voltage is in closed condition in a plurality of voltages of having set of input, the voltage that is set by the user to the video chip input then.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100401648A CN100381976C (en) | 2005-05-24 | 2005-05-24 | Input method of video chip changable voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100401648A CN100381976C (en) | 2005-05-24 | 2005-05-24 | Input method of video chip changable voltage |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1869878A true CN1869878A (en) | 2006-11-29 |
| CN100381976C CN100381976C (en) | 2008-04-16 |
Family
ID=37443556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100401648A Expired - Fee Related CN100381976C (en) | 2005-05-24 | 2005-05-24 | Input method of video chip changable voltage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100381976C (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100310100B1 (en) * | 1996-07-10 | 2001-12-17 | 윤종용 | Power supply apparatus for portable computer and dc input selection circuit adapted to same |
| JP2001273055A (en) * | 2000-03-24 | 2001-10-05 | Toshiba Corp | Portable information processing unit and method for system startup of the same |
| KR100424484B1 (en) * | 2001-07-05 | 2004-03-24 | 엘지전자 주식회사 | A power supply for central processing unit |
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2005
- 2005-05-24 CN CNB2005100401648A patent/CN100381976C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN100381976C (en) | 2008-04-16 |
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| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080416 Termination date: 20190524 |