CN1870095A - Panel module and its electric saving method - Google Patents
Panel module and its electric saving method Download PDFInfo
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- CN1870095A CN1870095A CN 200610087994 CN200610087994A CN1870095A CN 1870095 A CN1870095 A CN 1870095A CN 200610087994 CN200610087994 CN 200610087994 CN 200610087994 A CN200610087994 A CN 200610087994A CN 1870095 A CN1870095 A CN 1870095A
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Abstract
An energy-saving method of front plate module includes receiving the first image data and the second image data by sequential controller and comparing two said data by said controller to obtain data comparison result in order to let sequential controller control multiple source electrode driving chip and multiple grid driving chip as well as DC/DC converter to enter into energy-saving mode or not according to compared result of image data.
Description
Technical field
The invention relates to the technical field of panel, refer to a kind of panel module and electricity saving method thereof of being applicable to especially.
Background technology
Fig. 1 shows the current-voltage curve of thin film transistor (TFT) under conducting/closed condition, and it shows that thin film transistor (TFT) itself is not a perfect switch.Because thin film transistor (TFT) is in off position the time, still can there be leakage current in thin film transistor (TFT), makes the drain current of thin film transistor (TFT) toward descending, thus thin film transistor (TFT) conducting again again after closing a period of time, to upgrade the stored electric charge of thin film transistor (TFT).
Fig. 2 shows the synoptic diagram of the panel module 2 of general LCD, and it comprises display panel 21, a plurality of source driving chip (Source Driver IC) 221,222,223,224, reaches a plurality of grid drive chip (Gate Driver IC) 231,232,233.Upgrade the mode of thin film transistor (TFT) at present, mainly be by described grid drive chip 231,232,233 output grid control signals, with the thin film transistor (TFT) conducting in the control display panel 21, and described source driving chip 221,222,223,224 meetings be done the thin film transistor (TFT) in the display panel 21 simultaneously and discharge and recharge action, with the stored electric charge of the thin film transistor (TFT) in the update displayed panel 21.Yet the known practice is that the thin film transistor (TFT) to all pixel cells in the display panel 21 upgrades, and no matter panel module 2 shown pictures are dynamic or static.In addition, experience the switch motion of the thin film transistor (TFT) in the display panel 21 for fear of the user, in general, thin film transistor (TFT) is updated in 1 second 60 times at least in the display panel 21, therefore, no matter be dynamic menu or tableaux, constantly the thin film transistor (TFT) in the display panel 21 upgraded processing and will seriously expend system power supply.
Summary of the invention
A purpose of the present invention is to provide a kind of panel module and electricity saving method thereof, can reduce the power consumption of panel module.
According to a characteristic of the present invention, provide a kind of electricity saving method of panel module.This electricity saving method comprises the steps: that (A) receives the first image frame data and the second image frame data by time schedule controller; (B) compare the first image frame data and the second image frame data by time schedule controller, to obtain an image data comparison result; And (C) deciding a plurality of driving circuit assemblies whether to enter a battery saving mode according to the image data comparison result, wherein said driving circuit assembly comprises a plurality of source driving chips, a plurality of grid drive chip, and DC-to-DC converter.
According to another characteristic of the present invention, provide a kind of panel module.This panel module comprises display panel, a plurality of source driving chip, a plurality of grid drive chip, DC-to-DC converter, reaches time schedule controller.Aforementioned described source driving chip, described grid drive chip, and DC-to-DC converter all electrically connect with time schedule controller, and DC-to-DC converter also electrically connects with described source driving chip and described grid drive chip, to provide power supply to described source driving chip and described grid drive chip.Above-mentioned time schedule controller also receives the first image frame data and the second image frame data respectively, and controller is compared the first image frame data and the second image frame data, obtaining the image data comparison result, for time schedule controller according to image data comparison result control source driving chip, grid drive chip, and DC-to-DC converter whether enter battery saving mode.
According to another characteristic of the present invention, provide a kind of electricity saving method of panel module.This panel module comprises display panel, a plurality of source driving chip, a plurality of grid drive chip, reaches DC-to-DC converter.This electricity saving method comprises the steps: that (A) receives image frame data by time schedule controller; (B) this time schedule controller is compared these image frame data and previous image frame data, and obtaining an image data comparison result, this time schedule controller also judges whether to enter a battery saving mode according to this image data comparison result; And (C) if enter battery saving mode, and this image data comparison result includes at least one static image, then this time schedule controller control and the renewal frequency of the corresponding described grid drive chip reduction of this at least one static image to this at least one static image.
Above-mentioned battery saving mode is meant by normal renewal frequency and is reduced to default renewal frequency, and default renewal frequency is less than normal renewal frequency.
Above-mentioned display panel can be divided into a plurality of drive areas, and each drive area is that one of them of described source driving chip and one of them common factor of described grid drive chip form.
The above-mentioned image data comparison result is if include at least one static image, and then the corresponding described driving circuit assembly of time schedule controller control and this at least one static image reduces the renewal frequency to this at least one static image.
If above-mentioned image data comparison result: the second image frame data are a dynamic menu with respect to the first image frame data, then time schedule controller control described source driving chip, described grid drive chip, and DC-to-DC converter enter normal manipulation mode.
If the image data comparison result is: the second image frame data are tableaux with respect to the first image frame data, then time schedule controller control described source driving chip, described grid drive chip, and DC-to-DC converter enter battery saving mode, and time schedule controller also can enter battery saving mode.
If the image data comparison result is: the part picture data in the second image frame data is the partial dynamic picture with respect to the first image frame data, and then time schedule controller control enters battery saving mode with incoherent grid drive chip of this partial dynamic picture and source driving chip.That is time schedule controller control grid drive chip and the source driving chip relevant with this corresponding drive area of partial dynamic picture enters normal manipulation mode.In addition, time schedule controller and control grid drive chip and the source driving chip relevant with other drive area enter a battery saving mode.
Above-mentioned panel module also comprises picture buffer, electrically connects with time schedule controller, keeps in the image frame data that time schedule controller is received for picture buffer.
Description of drawings
Fig. 1 is the current-voltage curve of known thin film transistor (TFT) under conducting/closed condition.
Fig. 2 is the synoptic diagram of the panel module of known LCD.
Fig. 3 is the systemic-function calcspar of a preferred embodiment of the present invention.
Fig. 4 is the process flow diagram of the reduction panel module power consumption of a preferred embodiment of the present invention.
Fig. 5 is the synoptic diagram of the image frame data that show of the display panel of a preferred embodiment of the present invention.
Fig. 6 is that the partial dynamic picture of a preferred embodiment of the present invention is in the position view of overall image picture.
Fig. 7 is the synoptic diagram of the driving scope of the source driving chip of a preferred embodiment of the present invention and grid drive chip.
Fig. 8 is the action flow chart of the present invention's second preferred embodiment.
Symbol description:
Panel module 2 display panels 21,36
Source driving chip 221,222,223,224,351,352,353,354
Grid drive chip 231,232,233,341,342,343
Time schedule controller 31 picture buffer 32
DC-to-DC converter 33 webpage pictures 50
Tableaux 51,53,54 dynamic menus 52
Step S410, S415, S420, S425, S430, S435, S440, S805, S810, S815, S820
S825，S830，S835
Embodiment
Relevant preferred embodiment of the present invention, please be with reference to the systemic-function calcspar of Fig. 3 demonstration, it comprises time schedule controller 31, picture buffer (Frame Buffer) 32, DC-to-DC converter (DC-DCConverter) 33, a plurality of grid drive chip 341,342,343, a plurality of source driving chips 351,352,353,354, reach display panel 36.
Above-mentioned time schedule controller 31 respectively with picture buffer 32, DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 electrically connect, and to control its operation, wherein picture buffer 32 is in order to keep in the image frame data that time schedule controller 31 is received.DC-to-DC converter 33 and respectively with described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 electrically connect, to provide power supply to described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354.Described grid drive chip 341,342,343 also electrically connects with display panel 36.Described source driving chip 351,352,353,354 also electrically connects with display panel 36.
In present embodiment, above-mentioned time schedule controller 31, DC-to-DC converter 33, described grid drive chip 341,342,343, and described source driving chip 351,352,353,354 all belong to the part of the driving circuit assembly in the panel module.
In present embodiment, display panel 36 is the panel of Thin Film Transistor-LCD (TFT LCD).Because LCD belongs to a kind of maintenance (Hold Type) display, thus can keep its shown picture, so for the part that does not have change in the display frame, if reduce the power effect consumption that its renewal frequency then can effectively reduce panel module.
Fig. 4 shows that present embodiment reduces the process flow diagram of panel module power consumption, and relevant its explanation please be in the lump with reference to Fig. 3.At first, time schedule controller 31 is in order to (for example: present image frame data) and with it be temporary in (step S410) in the picture buffer 32 to receive the image frame data.Then, time schedule controller 31 its present image frame data that receive of comparison (are called at this: present image frame data) (be called at this: previous image frame data) with the previous image frame data that received and be temporarily stored in the picture buffer 32, to obtain an image data comparison result, can control DC-to-DC converter 33, described grid drive chip 341 according to this image data comparison result for time schedule controller 31,342,343, reach described source driving chip 351,352, whether 353,354 enter battery saving mode (step S415).
The above-mentioned image data comparison result may comprise following several situation: the image frame data may be identical with previous image frame data at present, that is image frame is a tableaux for previous image frame at present; Perhaps the image frame data are different with previous image frame data possibility part at present, that is the partial image in the present image frame is dynamic menu for previous image frame; Perhaps the image frame data may be different fully with previous image frame data at present, that is image frame is a dynamic menu for previous image frame at present.
Therefore, time schedule controller 31 can judge that earlier the image data comparison result is above-mentioned which kind of situation.At first, time schedule controller 31 judges whether present image frame is dynamic menu (step S420) with respect to previous image frame.Note that in present embodiment so-called dynamic menu is meant that all picture datas of present image frame are neither together with respect to all picture datas of previous image frame.
If image frame is a dynamic menu with respect to previous image frame at present, then time schedule controller 31 controls comprise DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353 driving circuit is kept normal manipulation mode, and the thin film transistor (TFT) in the update displayed panel 36, that is DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 all keep normal running and do not enter battery saving mode (step S425).For example: this moment, display panel 36 shown pictures may be animation, therefore display panel 36 each shown image frame may be inequality, so the driving circuit assembly in the driving circuit under the display panel 36 is still kept normal running, and comes the thin film transistor (TFT) in the display panel 36 is carried out more new element according to normal renewal frequency.
If image frame is not a dynamic menu with respect to previous image frame at present, then represent present image frame may be tableaux with respect to previous image frame, the partial image in the perhaps present image frame may be dynamic menu with respect to previous image frame.So time schedule controller 31 continues to judge whether present image frame is tableaux (step S430) with respect to previous image frame.Note that in present embodiment so-called tableaux is meant that all picture datas of present image frame are all identical with respect to all picture datas of previous image frame.
If image frame is a tableaux with respect to previous image frame at present, then time schedule controller 31 output signals are controlled DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 enter battery saving mode (step S425).For example: this moment, display panel 36 shown pictures may be PowerPoint picture or document processing picture, and these pictures are generally tableaux.
Because display panel 36 can keep its shown picture, so source driving chip 351 in the driving circuit, 352,353,354 need not the thin film transistor (TFT) in the display panel 36 to be done to discharge and recharge action always, and the grid drive chip in the driving circuit 341,342,343 also need not conducting constantly or closes thin film transistor (TFT) in the display panel 36.So time schedule controller 31 is just controlled source driving chip 351,352,353,354 with grid drive chip 341,342,343 enter battery saving mode.In addition, because of described source driving chip 351,352,353,354 with described grid drive chip 341,342,343 all enter battery saving mode, so provide voltage to described source driving chip 351,352,353,354 with described grid drive chip 341,342,343 DC-to-DC converter 33 also can be controlled by time schedule controller 31 and enter battery saving mode.
In present embodiment, so-called battery saving mode be meant to the thin film transistor (TFT) in the display panel 36 more new element be reduced to a default renewal frequency by normal renewal frequency (for example: per second upgrade 60 times), to save the power consumption of panel module, wherein default renewal frequency is lower than normal renewal frequency.In present embodiment, the renewal frequency of battery saving mode is that per second upgrades 5 times, and in other embodiments, the renewal frequency of battery saving mode can be the renewal frequency that per second upgrades 10 times or other is fit to.Therefore, time schedule controller 31 is judged when its present image frame that receives is tableaux with respect to previous image frame, time schedule controller 31 control DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 enter battery saving mode.
If at present image frame is not that dynamic menu is when also being not tableaux with respect to previous image frame, then representing the partial image in the present image frame is dynamic menu with respect to previous image frame, and the other parts image in the present image frame may be tableaux with respect to previous image frame.At this moment, time schedule controller 31 control section grid drive chip 341,342,343 enter battery saving mode (step S440) with part source driving chip 351,352,353,354.
For example: Fig. 5 shows the synoptic diagram of the image frame data that display panel 36 is shown.Display panel 36 shown pictures are webpage picture 50, and wherein webpage picture 50 includes part tableaux 51,53,54 and partial dynamic picture 52.Above-mentioned partial dynamic picture 52 is meant that display panel 36 present displayed contents are what change with respect to display panel 36 previous displayed contents.In addition, above-mentioned part tableaux 51,53,54 is meant that display panel 36 present displayed contents are identical with respect to display panel 36 previous displayed contents.
Fig. 6 display part dynamic menu is in the position view of overall image picture, and it is corresponding with Fig. 5, and demonstrates partial dynamic picture 52 positions among Fig. 5.
Fig. 7 shows source driving chip 351,352,353,354 with the synoptic diagram of the driving scope of grid drive chip 341,342,343.In Fig. 7, display panel 36 can be divided into a plurality of drive areas, and (S0G0～S5G2), each drive area is by wherein one source pole chip for driving 351,352,353,354 and one of them grid drive chip 341,342,343 are occured simultaneously.In present embodiment, partial dynamic picture 52 is positioned at grid drive chip 343 and source driving chip 351,352, in 354 drive areas of being responsible for (S0G2, S1G2, S2G2), so thin film transistor (TFT) in the time schedule controller 31 control grid drive chip 343 conducting drive areas (S0G2, S1G2, S2G2), and time schedule controller 31 control source driving chips 351,352,354 under normal manipulation mode, so that the thin film transistor (TFT) in drive area (S0G2, S1G2, S2G2) is discharged and recharged action, to upgrade image frame.In addition, because when grid drive chip 343 is opened, can make all thin film transistor (TFT)s in its range of control be unlocked simultaneously, so all source driving chips 351,352,353,354 thin film transistor (TFT)s of being controlled all can be unlocked simultaneously, cause the thin film transistor (TFT) in S0G2～S5G2 interval can operate in normal manipulation mode, and can not enter battery saving mode.Relatively, grid drive chip 341,342, (S0G0～S5G0 and S0G1～S5G1) show tableaux in the drive area of being responsible for, therefore time schedule controller 31 just may command grid drive chip 341,342 enter battery saving mode, to reduce grid drive chip 341, the renewal frequency of other thin film transistor (TFT) in the 342 pairs of display panels 36 is to reach less electricity consumption.
Fig. 8 shows the action flow chart of the present invention's second preferred embodiment, and the driving circuit that it adopted is same as the previously described embodiments, has only motion flow and the foregoing description similar.Relevant its action specification please be with reference to Fig. 3.
At first, time schedule controller 31 receives the image frame data (step S805) of outside input.Then, time schedule controller 31 comparison image frame data and the previous image frame data that receive, to obtain the image data comparison result, can judge whether to enter a battery saving mode (step S810) according to the image data comparison result for time schedule controller 31.
For example: when the time schedule controller 31 present image frame data that receive are dynamic menu with respect to previous image frame data, then do not enter battery saving mode, so time schedule controller 31 control DC-to-DC converter 33, described grid drive chip 341,342,343, reach described source driving chip 351,352,353,354 keep normal running (step S815).
If the time schedule controller 31 present image frame data that receive are that tableaux or some picture are tableaux with respect to previous image frame data, then enter battery saving mode.At this moment, time schedule controller 31 can be judged according to the comparison result of image frame data that received and previous image frame data and enters which kind of battery saving mode (step S820).If the image data comparison result includes at least one static image, then time schedule controller 31 controls and the renewal frequency (step S825) of corresponding described grid drive chip 341,342,343 reductions of this at least one static image to this static image.If the image data comparison result is: these image frame data are tableaux with respect to these previous image frame data, then time schedule controller 31 is controlled described source driving chip 351,352,353,354, described grid drive chip 341,342,343, reach this DC-to-DC converter 33 and reduce its power consumptions (step S825, step S830, step S835).
By above explanation as can be known, the control signal that the present invention decides time schedule controller to export according to actual displayed image data image data comparison result enters battery saving mode with control source driving chip, grid drive chip or DC-to-DC converter.In addition, when technical characterictic of the present invention is that present image frame data present at least a portion static image with respect to previous image frame data, time schedule controller provided by the present invention can be at the driving circuit assembly relevant with this part static image (for example: grid drive chip) economize on electricity, to reduce the power consumption of panel module.
The foregoing description is only given an example for convenience of description, and the interest field that the present invention advocated should be as the criterion so that claim is described certainly, but not only limits to the foregoing description.
Claims (19)
1. the electricity saving method of a panel module comprises the steps:
(A) receive one first image frame data and one second image frame data by time schedule controller;
(B) compare these first image frame data and this second image frame data by this time schedule controller, to obtain an image data comparison result; And
(C) decide a plurality of driving circuit assemblies whether to enter a battery saving mode according to this image data comparison result.
2. electricity saving method as claimed in claim 1, wherein said driving circuit assembly comprise a plurality of source driving chips, a plurality of grid drive chip, reach a DC-to-DC converter.
3. electricity saving method as claimed in claim 2, wherein in step (C), if this image data comparison result is: these second image frame data are a dynamic menu with respect to these first image frame data, then this time schedule controller control described source driving chip, described grid drive chip, and this DC-to-DC converter enter a normal manipulation mode.
4. electricity saving method as claimed in claim 2, wherein in step (C), if this image data comparison result is: these second image frame data are a tableaux with respect to these first image frame data, then described source driving chip, described grid drive chip, and this DC-to-DC converter enter this battery saving mode.
5. electricity saving method as claimed in claim 2, wherein in step (C), if this image data comparison result is: the part picture data in these second image frame data is a part of dynamic menu with respect to these first image frame data, then enters this battery saving mode with the incoherent grid drive chip of this partial dynamic picture.
6. electricity saving method as claimed in claim 1, wherein this battery saving mode is meant by a normal renewal frequency and is reduced to a default renewal frequency, and should preset renewal frequency less than this normal renewal frequency.
7. electricity saving method as claimed in claim 1, wherein in step (C), if this image data comparison result includes at least one static image, then control and the renewal frequency of the corresponding described driving circuit assembly reduction of this at least one static image to this at least one static image.
8. panel module comprises:
One display panel;
A plurality of source driving chips electrically connect with this display panel;
A plurality of grid drive chip electrically connect with this display panel;
One DC-to-DC converter electrically connects with described source driving chip and described grid drive chip respectively, to provide power supply to described source driving chip and described grid drive chip; And
Time schedule controller, respectively with described source driving chip, described grid drive chip, and this DC-to-DC converter electrically connects, to control its operation, this time schedule controller also receives one first image frame data and one second image frame data respectively, and this time schedule controller is compared these first image frame data and this second image frame data, to obtain an image data comparison result, control described source driving chip according to this image data comparison result for this time schedule controller, described grid drive chip, and whether this DC-to-DC converter enters a battery saving mode.
9. panel module as claimed in claim 8, wherein if this image data comparison result be: these second image frame data are a dynamic menu with respect to these first image frame data, then this time schedule controller control described source driving chip, described grid drive chip, and this DC-to-DC converter enter a normal manipulation mode.
10. panel module as claimed in claim 8, wherein as if this image data comparison result be: these second image frame data are a tableaux with respect to these first image frame data, then described source driving chip, described grid drive chip, and this DC-to-DC converter enter this battery saving mode, and this time schedule controller also enters this battery saving mode.
11. panel module as claimed in claim 8, wherein as if this image data comparison result be: the part picture data in these second image frame data is a part of dynamic menu with respect to these first image frame data, and then this time schedule controller control enters a battery saving mode with incoherent grid drive chip of this partial dynamic picture and source driving chip.
12. panel module as claimed in claim 8, wherein this battery saving mode is meant by a normal renewal frequency and is reduced to a default renewal frequency, and should preset renewal frequency less than this normal renewal frequency.
13. panel module as claimed in claim 8, wherein this display panel is divided into a plurality of drive areas, and each drive area is that one of them of described source driving chip and one of them common factor of described grid drive chip form.
14. panel module as claimed in claim 13, wherein as if this image data comparison result be: the part picture data in these second image frame data is a part of dynamic menu with respect to these first image frame data, and then this time schedule controller control grid drive chip and source driving chip relevant with this corresponding drive area of partial dynamic picture enters a normal manipulation mode.
15. panel module as claimed in claim 14, wherein this time schedule controller and the control grid drive chip relevant with other drive area enter a battery saving mode.
16. panel module as claimed in claim 8 also comprises a picture buffer, electrically connects with this time schedule controller, keeps in the image frame data that this time schedule controller is received for this picture buffer.
17. panel module as claimed in claim 8, wherein this image data comparison result includes at least one static image, then this time schedule controller control and the renewal frequency of the corresponding described driving circuit assembly reduction of this at least one static image to this at least one static image.
18. the electricity saving method of a panel module, this panel module comprise a display panel, a plurality of source driving chip, a plurality of grid drive chip, reach a DC-to-DC converter, this electricity saving method comprises the steps:
(A) receive image frame data by time schedule controller;
(B) this time schedule controller is compared these image frame data and previous image frame data, and obtaining an image data comparison result, this time schedule controller also judges whether to enter a battery saving mode according to this image data comparison result; And
(C) if enter battery saving mode, and this image data comparison result includes at least one static image, then this time schedule controller control and the renewal frequency of the corresponding described grid drive chip reduction of this at least one static image to this at least one static image.
19. electricity saving method as claimed in claim 18, wherein in this step (C), if this image data comparison result is: these image frame data are a tableaux with respect to these previous image frame data, then this time schedule controller control described source driving chip, described grid drive chip, and this DC-to-DC converter enter this battery saving mode.
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