CN101783130A - Display driving device and display overdriving method - Google Patents
Display driving device and display overdriving method Download PDFInfo
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- CN101783130A CN101783130A CN200910002688A CN200910002688A CN101783130A CN 101783130 A CN101783130 A CN 101783130A CN 200910002688 A CN200910002688 A CN 200910002688A CN 200910002688 A CN200910002688 A CN 200910002688A CN 101783130 A CN101783130 A CN 101783130A
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Abstract
The invention discloses a display driving device and a display overdriving method. The display overdriving method comprises the following steps: firstly, setting a power-saving mode parameter to be equal to an initial value; secondly, receiving current frame data; thirdly, reading previous frame data stored in a memory; fourthly, comparing the current frame data with the previous frame data to change the power-saving mode parameter; and finally, executing an overdriving program on a display by comparing the power-saving mode parameter with a reference value.
Description
Technical field
The present invention relates to the drive unit and the driving method of display, and particularly about a kind of over-driving method of drive unit of display.
Background technology
Along with advancing by leaps and bounds of electronics technology, the consumer also increases day by day for the demand of the electronic product with multi-media player function.Particularly in the part of the broadcast of image, display now not only needs to provide to be play outside the tableaux, provides the requirement of dynamic menu also to become the basic functions demand.
At this, on the display of large-size, in order to strengthen the expressivity that image is play, (over driving, type of drive OD) is suggested a kind of so-called overdriving.Wherein, (Liquid Crystal Display is LCD) on the panel, because that the reversal rate of liquid crystal relatively plays the reaction velocity of driving voltage is many slowly in liquid crystal display.Therefore, this mode of overdriving drives the upset speed of quickening liquid crystal by utilizing bigger driving voltage, to promote the GTG expressivity of display.
Please refer to Fig. 1, Fig. 1 illustrates the process flow diagram of the existing mode of overdriving.Wherein in the existing mode of overdriving, at first, receive present picture frame data (S110), then, read last time picture frame data (S120) stored in the internal memory.Then at present picture frame data and last time the picture frame data compare, and produce new picture frame data (S130), and utilize these new picture frame data to produce corresponding driving voltage, come driving display (S150).At this, for instance, if last time the GTG value of picture frame data was 0, and the GTG value of present picture frame data is 63, is 63 position in order to allow liquid crystal be turned to the GTG value fast, adopts GTG value 80 as new picture frame data, and the display of overdriving.In addition, present picture frame data then are stored in the note body (S140), and the last time picture frame data of the comparison foundation of conduct in the time will showing next picture frame.
Be not difficult to find by above-mentioned explanation, no matter the received picture frame data of the existing mode of overdriving are tableaux or dynamic menu, all necessary access memory.Yet, in fact the data that last time reach present picture frame data of tableaux are similar mostly, the comparison and the access memory that do not need repetition, this repeats the action of access memory and comparison, obviously is too to waste the frequency range of internal memory and cause unwanted power consumption.
Summary of the invention
The invention provides a kind of over-driving method of display, is tableaux or dynamic menu in order to judgement display frame, and the corresponding program of overdriving of carrying out.
The invention provides a kind of drive unit of display, is tableaux or dynamic menu in order to judgement display frame, and the corresponding program of overdriving of carrying out.
The invention provides a kind of over-driving method of display, comprising: at first, the setting power saving mode parameter equals initial value, and, receive present picture frame data, then, read last time picture frame data stored in the internal memory.Then, the present picture frame data of comparison and this last time the picture frame data change the battery saving mode parameter.At last, come display is carried out the program of overdriving according to comparison battery saving mode parameter and reference value.
The invention provides a kind of drive unit of display, comprise internal memory and controller.Internal memory is in order to storing last time picture frame data, and controller then is to couple internal memory, in order to receiving present picture frame data, and reads last time picture frame data, and compare present picture frame data and last time the picture frame data with change battery saving mode parameter.In addition, controller comes at the corresponding program of overdriving of carrying out of display according to the result of comparison battery saving mode parameter and reference value.
Based on above-mentioned, the present invention can effectively judge and show that the picture frame data are dynamic menu or tableaux, and the corresponding program of overdriving of carrying out, make the internal memory that is used for storing present picture frame data can remove from repeatedly access and the power that avoids waste.And, when showing tableaux, do not need to carry out the unnecessary program of overdriving, the consume that can effectively save power equally.
For above-mentioned feature and advantage of the present invention can be become apparent, embodiment cited below particularly, and cooperate appended graphic being described in detail below.
Description of drawings
Fig. 1 illustrates the process flow diagram of the existing mode of overdriving;
Fig. 2 illustrates the synoptic diagram of drive unit 210 of the display of one embodiment of the invention;
Fig. 3 illustrates the process flow diagram of the over-driving method of one embodiment of the invention.
[main element symbol description]
210: drive unit
211: controller
212: internal memory
213: driving circuit
220: display
PFD: picture frame data
S110～S150, S310～S390: the step of the mode of overdriving
Embodiment
At first please refer to Fig. 2, Fig. 2 illustrates the synoptic diagram of drive unit 210 of the display of one embodiment of the invention.Drive unit 210 comprises controller 211, internal memory 212 and driving circuit 213.Wherein, controller 211 couples internal memory 212 and driving circuit 213, and drive unit 210 also couples driving display 220 with driving display 220.In the present embodiment, display 220 is a LCD.
Aspect the action details of drive unit 210, controller 211 receives present picture frame data PFD by the outside, and this present picture frame data PFD is exactly the picture frame data that will show at present.After controller 211 receives present picture frame data PFD, just by stored last time picture frame data before reading in the internal memory 212.And at being compared by last time picture frame data of reading in the internal memory 212 and present picture frame data PFD, this compares action, and is simple, is exactly the poor of the relatively GTG value between two picture frame data.
At this, if the grayscale difference between two picture frame data is little, just representing also in fact that two shown images of frame data almost are identical, just display 220 will show the picture of a static state.In other words, if the grayscale difference between two picture frame data represents then that greatly to more than certain degree two shown images of frame data have very big difference, just display 220 is to display is a dynamic image.At this, the difference of above-mentioned so-called certain degree then is comparison critical value that user or deviser provided.That is to say, when the grayscale difference of present picture frame data PFD and picture frame data last time greater than critical value relatively, the image that expression display 220 will show may be dynamic image.
Owing to the picture frame data may be because interference that factor of environmental produced make present picture frame data PFD inaccurate with the difference of picture frame data last time, once this inaccurate change is when very big, and when making the big too above-mentioned comparison critical value of the difference of the GTG value between two picture frame data, the view data that controller can be judged present picture frame data PFD by accident is that dynamic image data produces misoperation.Or only have the GTG value between the picture frame data of minority that bigger change is arranged in the continuous images picture frame data, when the GTG value change between most picture frame data is all little, be not dynamic image data.Therefore, more be provided with a so-called battery saving mode parameter in the present embodiment.At first, controller 211 can first setting power saving mode parameter be an initial value, in case the picture frame data PFD that controller 211 comparison is present and when last time the difference of picture frame data was greater than critical value relatively, the controller 211 battery saving mode parameter (for example making this battery saving mode parameter subtract 1) of successively decreasing, if when controller 211 was compared present picture frame data and last time the difference of picture frame data was not more than the comparison critical value, 211 of controllers increased progressively battery saving mode parameter (for example making this battery saving mode parameter add 1).
Certainly, in order to make the battery saving mode parameter that the phenomenon of overflow (overflow or underflow) can not take place, when controller 211 increases progressively battery saving mode parameter to last prescribing a time limit, just can not increase the battery saving mode parameter again, opposite, when controller 211 successively decreases battery saving mode parameter to down in limited time, just can not increase and decrease the battery saving mode parameter again.
In addition, controller 211 and comparison battery saving mode parameter and reference value are used as whether will carrying out the foundation of the program of overdriving.In other words, be exactly when controller 211 comparison repeatedly present picture frame data and when last time the difference of picture frame data was greater than critical value relatively, and make the battery saving mode parameter be decremented to when being less than or equal to reference value, then the GTG value judged between a plurality of continuous picture frame data of expression changes all very greatly, therefore, what display 220 will show is dynamic image data, must carry out the program of overdriving.
Overdrive aspect the program in execution, controller 211 stores present picture frame data PFD in internal memory 212, controller 211 and according to present picture frame data PFD and the difference of picture frame data and the present picture frame data PFD display 220 of overdriving last time.For instance, if present picture frame data PFD and last time the difference of picture frame data be 10, that GTG value of picture frame data that is used for driving display 220 can be set at and calculate present picture frame data PFD and add 15.
What deserves to be mentioned is that employed internal memory 212 is DRAM (Dynamic Random Access Memory) in the present embodiment, certainly, other can all can be used for implementing present embodiment for the internal memory of read-write, and this knows usually that for this area tool the knowledgeable all can understand easily, then seldom gives unnecessary details herein.
In addition, if controller 211 received present picture frame data PFD are the picture frame data of the first stroke, 211 of controllers directly store present picture frame data PFD to internal memory 212, and directly according to present picture frame data PFD this display 220 of overdriving.
In addition, 213 of driving circuits are the reception picture frame data that controller produced, and the corresponding driving voltage that produces comes driving display 220.Driving circuit 213 includes gate driver circuit (Gate Driver) and source class driving circuit (Source Driver), and driving voltage 213 to be this area tools know usually circuit that the knowledgeable knows and can implement is easily seldom given unnecessary details herein.
Below please refer to Fig. 3, Fig. 3 illustrates the process flow diagram of the over-driving method of one embodiment of the invention.Its step comprises: at first, the setting power saving mode parameter equals initial value (step S310), then, receives present picture frame data (step S320), then, judges that whether the battery saving mode parameter is greater than reference value (step S330).If the result who judges then shows present picture frame data (step S390) with common type of drive for being, just utilize the direct driving display of GTG value of present picture frame data.If the result who judges then reads last time picture frame data (step S340) stored in the internal memory for not.And, compare at picture frame data last time and present picture frame data, and utilize result relatively to change battery saving mode parameter (step S350).
Then, with present picture frame data storing (step S360) in internal memory, and according to present picture frame data and the difference of picture frame data last time and at present the picture frame data calculate the picture frame data that make new advances and come driving display (step S370).
In sum, the present invention thus, can make the frequency range of internal memory use more efficient by judging that display image to display is that dynamic image or still image determine whether getting Dram, and, the unnecessary power consumption that is produced when being saved excessive access memory.In addition, the present invention can not need to continue to overdrive when showing tableaux yet, can save power.
Though the present invention discloses as above with embodiment; right its is not in order to limit the present invention; have in the technical field under any and know the knowledgeable usually; without departing from the spirit and scope of the present invention; when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (12)
1. the over-driving method of a display is characterized in that comprising:
Set a battery saving mode parameter and equal an initial value;
Receive present picture frame data;
Read in the internal memory stored one picture frame data last time;
Compare these present picture frame data and this last time the picture frame data change this battery saving mode parameter; And
Come this display execution one program of overdriving according to comparison this battery saving mode parameter and a reference value.
2. over-driving method as claimed in claim 1 is characterized in that, this program of overdriving comprises:
Store these present picture frame data in this internal memory; And
According to these present picture frame data and this difference of picture frame data and present picture frame data this display of overdriving last time.
3. over-driving method as claimed in claim 1, this foundation of described over-driving method these present picture frame data of comparison and this last time the picture frame data step that changes this battery saving mode parameter comprise:
When these present picture frame data and this last time the difference of picture frame data greater than one relatively during critical value, this battery saving mode parameter of successively decreasing; And
When these present picture frame data and this when last time the difference of picture frame data was not more than this comparison critical value, increase progressively this battery saving mode parameter.
4. over-driving method as claimed in claim 3 is characterized in that, this step of this display carrying out this program of overdriving according to this battery saving mode parameter of comparison and this reference value comprises:
When this battery saving mode parameter is less than or equal to this reference value, carry out this program of overdriving.
5. over-driving method as claimed in claim 1 is characterized in that, also comprises:
When receiving these present picture frame data of the first stroke, store the first stroke this present picture frame data to this internal memory, and direct according to these present picture frame data of the first stroke this display of overdriving.
6. over-driving method as claimed in claim 1 is characterized in that, saves as DRAM (Dynamic Random Access Memory) in this.
7. the drive unit of a display is characterized in that comprising:
One internal memory is in order to store picture frame data last time; And
One controller, couple this internal memory, receive present picture frame data, and read this last time picture frame data, and compare these present picture frame data and this last time the picture frame data to change a battery saving mode parameter, this controller is also according to the result of comparison this battery saving mode parameter and a reference value, comes at this display corresponding execution one program of overdriving.
8. the drive unit of display as claimed in claim 7, it is characterized in that, this controller stores these present picture frame data in this internal memory, and according to these present picture frame data and this last time the difference of picture frame data overdrive this display to carry out this program of overdriving.
9. the drive unit of display as claimed in claim 7, it is characterized in that, when this controller judge picture frame data that this is present and this last time the difference of picture frame data greater than one relatively during critical value, this controller this battery saving mode parameter of successively decreasing, and when this controller was judged picture frame data that this is present and this last time the difference of picture frame data was less than or equal to this comparison critical value, this controller increased progressively this battery saving mode parameter.
10. the drive unit of display as claimed in claim 7 is characterized in that, when this controller judges that this battery saving mode parameter is not more than this reference value, carries out this program of overdriving.
11. the drive unit of display as claimed in claim 7, it is characterized in that, when controller received these present picture frame data of the first stroke, this controller stored these present picture frame data of the first stroke to this internal memory, and according to these present picture frame data of the first stroke this display of overdriving.
12. the drive unit of display as claimed in claim 7 is characterized in that, saves as DRAM (Dynamic Random Access Memory) in this.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910002688A CN101783130A (en) | 2009-01-19 | 2009-01-19 | Display driving device and display overdriving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910002688A CN101783130A (en) | 2009-01-19 | 2009-01-19 | Display driving device and display overdriving method |
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| CN200910002688A Pending CN101783130A (en) | 2009-01-19 | 2009-01-19 | Display driving device and display overdriving method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592555A (en) * | 2012-02-03 | 2012-07-18 | 福州瑞芯微电子有限公司 | Regulating circuit and regulating method capable of reducing power consumption of screen |
| CN103943074A (en) * | 2013-01-17 | 2014-07-23 | 瑞昱半导体股份有限公司 | Overdrive control method and overdrive control circuit |
| US9355604B2 (en) | 2013-01-09 | 2016-05-31 | Realtek Semiconductor Corp. | Overdriving control method with image compression control and related circuit |
| CN113178178A (en) * | 2018-03-23 | 2021-07-27 | 奇景光电股份有限公司 | Overdrive method and time sequence controller |
-
2009
- 2009-01-19 CN CN200910002688A patent/CN101783130A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102592555A (en) * | 2012-02-03 | 2012-07-18 | 福州瑞芯微电子有限公司 | Regulating circuit and regulating method capable of reducing power consumption of screen |
| CN102592555B (en) * | 2012-02-03 | 2014-07-30 | 福州瑞芯微电子有限公司 | Regulating circuit and regulating method capable of reducing power consumption of screen |
| US9355604B2 (en) | 2013-01-09 | 2016-05-31 | Realtek Semiconductor Corp. | Overdriving control method with image compression control and related circuit |
| CN103943074A (en) * | 2013-01-17 | 2014-07-23 | 瑞昱半导体股份有限公司 | Overdrive control method and overdrive control circuit |
| CN103943074B (en) * | 2013-01-17 | 2017-04-12 | 瑞昱半导体股份有限公司 | Overdrive control method and overdrive control circuit |
| CN113178178A (en) * | 2018-03-23 | 2021-07-27 | 奇景光电股份有限公司 | Overdrive method and time sequence controller |
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Application publication date: 20100721 |