CN100550094C - The display drive method that cpable of lowering power consumes - Google Patents

The display drive method that cpable of lowering power consumes Download PDF

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Publication number
CN100550094C
CN100550094C CNB2005100905796A CN200510090579A CN100550094C CN 100550094 C CN100550094 C CN 100550094C CN B2005100905796 A CNB2005100905796 A CN B2005100905796A CN 200510090579 A CN200510090579 A CN 200510090579A CN 100550094 C CN100550094 C CN 100550094C
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China
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row
conducting
image data
present
display
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CNB2005100905796A
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CN1917003A (en
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庄又春
史涴宜
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DIANJING SCIENCE AND TECHNOLOGY Co Ltd
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DIANJING SCIENCE AND TECHNOLOGY Co Ltd
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Abstract

The present invention is the display drive method that a kind of cpable of lowering power consumes, it utilizes a control module to determine the driving order of the sweep trace of a display panel, but not scanning one by one, wherein this control module includes the arithmetic logic unit that the internal memory and that can keep in display data connects this internal memory, utilizing arithmetic logic unit is reference column with the grey-tone image data of present conducting row, with this reference column be temporary in n row grey-tone image data to be scanned in internal memory comparison, the sequence of selected total GTG difference minimum is next conducting row, so earlier, two row of back conducting are because of the gray scale variation minimum, so can reduce power consumption.

Description

The display drive method that cpable of lowering power consumes
Technical field
The present invention is a kind of scan method that is applied to drive device for display, refers to especially a kind ofly determine the mode of scanning sequency with the grayscale difference according to image data, to reduce power consumers.
Background technology
As shown in Figure 2, it is the type of drive synoptic diagram of a known thin display, slim panel 50 generally is to utilize a delegation's driver module 62 and a row driver module 64 to intersect to control, and row driver module 62 is to be connected with a plurality of data lines 63, and row driver module 64 then provides multi-strip scanning line 65.Wherein, be to be formed with the multiple spot picture element on this slim panel 50, each picture element 51 is corresponding to both crossover locations of a data line 63 and sweep trace 65.
When the slim panel 50 of control makes its image output, aforementioned row driver module 64 is to send sweep signal in regular turn to sweep trace 65, in 51 GTG signals of being exported according to its data line 63 separately of same each picture element that lists, decision is to desire to carry out the charge or discharge action, because the renewal speed of scanning is exceedingly fast, utilize the persistence of vision impression of human eye just can on slim panel 50, present an image output with stable image quality.
Along with high-resolution thin display comes out, picture element 51 numbers on the slim panel 50 of the person of meaning increase relatively, therefore under the constant situation of frame updating frequency, each bar sweep trace 65 assigned ON time shortens relatively, in the so short time, each picture element 51 just is difficult to reach charge/discharge completely, promptly is that contrast declines to a great extent to the influence of picture quality.Moreover, the problem that slim panel 50 another factors that must consider promptly are power consumptions.As previously mentioned, known row driver element 60 be from first to last in regular turn the output scanning signal to those sweep traces 65, therefore when there is huge gray scale variation in the picture element 51 on the two adjacent sweep traces 65, to move caused power consumption problem obvious especially because of extreme charge/discharge.
For the portable electron device of lightweight and portable in volume, for example personal mobile phone, digital aid (PDA), digital music broadcasting machine (MP3Player) etc., slim display panel become the standard package that these digital devices show as data already.Angle with the research and development improvement, aforementioned means must be considered the power consumption problem that faces when the consumer uses, therefore, if the consumed power of this slim display panel is able to effective reduction, also can make the power consumption of single unit system can obtain benefiting to a certain degree.
Summary of the invention
When the GTG signal significantly changed, its power consumption improved relatively in view of traditional driving method that is applied to display pannel, and fundamental purpose of the present invention is the technology that a kind of non-scanning of conducting one by one is provided, and uses the power consumption that reduces drive unit.
For reaching aforementioned purpose, the invention provides the display drive method that a kind of cpable of lowering power consumes, this display has m column scan line, wherein, it is reference column that this driving method makes the grey-tone image data of present conducting row, this reference column compares to calculate the GTG difference one by one with whole its row grey-tone image data to be shown, and be next conducting row in wherein selecting total GTG difference reckling, all finish a complete scanning update cycle up to whole m column scan lines, and selected row to be scanned can force and carry out conducting scanning.
The display drive method that cpable of lowering power of the present invention consumes, also can make the grey-tone image data of present conducting row is reference column, this reference column compares with a part of its row grey-tone image data to be shown, and be next conducting row in wherein selecting total GTG difference reckling, so repeat all to finish a complete scanning update cycle up to whole m column scan lines, Xuan Ding row to be scanned can not force and carry out conducting scanning.
The display drive method that cpable of lowering power of the present invention consumes, also can classify the m column scan line of a display as a group of unit with N compares, and the sweep trace of last conducting of including last group in is for waiting to judge a datum line of group at present, and multiple calculating waits to judge (N+1) of the N bar sweep trace of group at present! Planting the GTG difference summation of permutation and combination order, get its GTG difference summation reckling, is the conducting order of this group's sweep trace.
By total GTG difference of each row image data of comparison, be to find out only conducting scanning sequency, effectively reduced power attenuation.
Description of drawings
Fig. 1: be circuit block diagram of the present invention.
Fig. 2: the type of drive synoptic diagram that is a known display.
[primary clustering symbol description]
10-control module 11-internal memory
The 12-arithmetic logic unit
The slim panel 51-of 50-picture element
The capable driver element 63-of 62-data line
64-row driver element 65-sweep trace
Embodiment
See also shown in Figure 1, circuit block diagram for one embodiment of the invention, one slim panel 50 utilizes delegation's driver element 62 and 64 controlling and driving of a row driver element equally, plural sweep trace 65 and data line 63 by row driver element 62 and 64 outputs of row driver element are to intersect to control the plural picture element 51 that is arranged on this slim panel 50, in the present invention, being an extra control module 10 decision scanning sequencies that add except that aforementioned basic module, is to include the arithmetic logic unit 12 that the internal memory 11 and that can keep in display data connects this internal memory 11 in this control module 10.
As can be known when the GTG data gap of two adjacent column greatly the time, power consumption obviously increases in the explanation of aforementioned known techniques.Therefore, if can avoid earlier, when total GTG data of two adjacent column of back conducting has significant change, just can effectively save power attenuation, based on above notion, the practice of the present invention is as follows:
Image data temporary to be shown is in this internal memory 11;
Read temporary image data and export arithmetic logic unit 12 to from internal memory 11;
Row image data GTG value during comparison is just scanning at present and the image data GTG value of other row to be scanned are to calculate both total GTG value difference distances;
The total GTG value difference of this row image data in selected and the current scanline is apart from its row image data of minimum, as next row image data that scans;
Repeat above-mentioned steps, all shown up to the image data of each row and finished.
Be the aforementioned practice of specific explanations, below will list several different embodiment of the present invention:
At first, for two different lines Row i, Row jTotal GTG data difference, be to be expressed as:
GLD ( ij ) = Σ k = 1 n | D ik - D jk |
Wherein, D is represented as the GTG value of each point picture element (pixel), generally is to represent (2 with m bit m), and have n picture element in the row, in two different lines (i, j) in the GTG difference of corresponding pixel points be | D Ik-D Jk|, and with after the GTG difference addition of being had a few, just be two different lines Row i, Row jTotal GTG data difference GLD (ij)Simplifying under the considering of computing, though the GTG of each point picture element is to represent with m bit, during actual operation, the tangible GTG value (being high bit MSB) of desirable its effect, and ignore it, for example a than low level (LSB) 5a 4a 3a 2a 1a 0-b 5b 4b 3b 2b 1b 0The time, a of two numerical value 1a 0, b 1b 0The position is to ignore, and only gets preceding four and compares.
Practice A: suppose that the 1st classifies present conducting row as, then utilize aforementioned arithmetic logic unit 12 to calculate indivedual and the 1st total GTG difference GLD that is listed as of the 2nd to s row (21), GLD (31)... GLD (s1), and in these differences taking-up recklings.If GLD (31)Be minimum value, the 3rd row promptly are chosen to be the next column of desiring conducting, then more relatively the 2nd, the difference GLD of 4-s row and the 3rd row (23), GLD (43)... GLD (s3), take out reckling as the next column of desiring conducting in these differences again.So constantly repeat comparison, up to finishing a complete scan period.
Practice B: this kind practice is to make aforementioned arithmetic logic unit 12 be compared with the image data of present conducting row and the image data of all the other N row at least two row, in these two row, select total GTG difference smaller as next conducting row, and not selected person is temporary in still in the internal memory 11.
Classify benchmark as with this conducting of selecting, be temporary in the row image data comparison that the row image data and in the internal memory 11 newly reads in, get total GTG difference smaller again and be next conducting row, so repeat to be listed as all been scanned up to each with this.
With two row data is example (N=2), if the 1st row are classified in conducting at present as, then compares total GTG difference GLD of the 2nd, 3 liang of row and the 1st row (21), GLD (31), if GLD (31)<GLD (21), then the selected the 3rd classify next conducting row as.And the 2nd row image data still is temporary in the internal memory 11, and reads in the 4th new row image data, and calculates the GTG difference GLD of 2,4 liang of row and the 3rd row (23), GLD (43), so repeat.
Yet, to two kinds of practices of aforementioned A, B, for the image data of avoiding a certain row slowly can't be switched on the display quality that scanning influences picture, this control module 10 is to have the function that the scanning of forcing is upgraded, in the specific time, even the GTG difference that should be listed as is undesirable, still force this row conducting to upgrade to keep preferable image output.
Practice C: be the columns GTG data in some, obtain the conducting order of full blast, the method is to be limited to earlier when carrying out the GTG comparisons, and N columns data is compared, and obtains its best conducting order.For example, if be listed as considering Row with 4 1, Row 2, Row 3, Row 4, and conducting person is the 1st row at present, then calculates following each value:
SGLD (1→2→3→4)=GLD (21)+GLD (32)+GLD (43)
SGLD (1→2→4→3)=GLD (21)+GLD (42)+GLD (34)
SGLD (1→3→2→4)=GLD (31)+GLD (23)+GLD (42)
SGLD (1→3→4→2)=GLD (31)+GLD (43)+GLD (24)
SGLD (1→4→2→3)=GLD (41)+GLD (24)+GLD (32)
SGLD (1→4→3→2)=GLD (41)+GLD (34)+GLD (23)
Above-mentioned six SGLD numeric representations under different conductings order, may the arranging of the gray scale variation total value of this 4 row image data, wherein the numerical value reckling is promptly represented best conducting order.After the order decision of 1-4 row, classify reference column as with that of last conducting again, with the mutual conducting order of obtaining full blast of comparing of 5-7 row, with this way, N row data is compared for one group, all each row all calculate and finish on panel, and this way can avoid two kinds of practices of aforementioned A, B to have wherein the row slowly can't conducting, and then influence the shortcoming of picture quality.
The present invention pursues the power consumption problem that column scan caused in view of tradition, so total GTG difference by each row image data of comparison, find out only conducting scanning sequency by this, be effectively to improve to commonly use shortcoming and possess tangible effect and promote, so in meeting under the patent of invention important document prerequisite, file an application in whence mere formality in accordance with the law.
Only the above person only is preferred embodiment of the present invention, when can not with restriction category of the present invention.Promptly the equalization of being done according to the present patent application claim generally changes and modifies, and will not lose main idea of the present invention place, does not also break away from the spirit and scope of the present invention, so all should be considered as further enforcement situation of the present invention.Therefore protection scope of the present invention is accurate for complying with when looking accompanying the claim person of defining of institute.

Claims (3)

1. the display drive method that consumes of a cpable of lowering power, this display has m column scan line, it is characterized in that, wherein, it is reference column that this driving method makes the grey-tone image data of present conducting row, this reference column compares to calculate the GTG difference one by one with whole its row grey-tone image data to be shown, and be next conducting row in wherein selecting total GTG difference reckling, all finish a complete scanning update cycle up to whole m column scan lines, Xuan Ding row to be scanned can not force and carry out conducting scanning.
2. the display drive method that consumes of a cpable of lowering power, this display has m column scan line, it is characterized in that, wherein, it is reference column that this driving method makes the grey-tone image data of present conducting row, and this reference column and a part its row grey-tone image data to be shown relatively and is listed as for next conducting in wherein selecting total GTG difference reckling, so repeat all to finish a complete scanning update cycle up to whole m column scan lines, Xuan Ding row to be scanned can not force and carry out conducting scanning.
3. the display drive method that consumes of a cpable of lowering power, it is characterized in that, classifying the m column scan line of a display as a group of unit with N compares, and the sweep trace of last conducting of including last group in is for waiting to judge a datum line of group at present, and multiple calculating waits to judge (N+1) of the N bar sweep trace of group at present! Planting the GTG difference summation of permutation and combination order, get its GTG difference summation reckling, is the conducting order of this group's sweep trace.
CNB2005100905796A 2005-08-17 2005-08-17 The display drive method that cpable of lowering power consumes Expired - Fee Related CN100550094C (en)

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KR20140071688A (en) * 2012-12-04 2014-06-12 삼성디스플레이 주식회사 Display Device and Driving Method Thereof
CN104575440A (en) 2015-02-15 2015-04-29 京东方科技集团股份有限公司 Display driving circuit, driving method of display driving circuit and display device
TWI559277B (en) * 2015-04-15 2016-11-21 Display and its scanning method
CN105047157B (en) 2015-08-19 2017-10-24 深圳市华星光电技术有限公司 A kind of source electrode drive circuit
CN106847219B (en) * 2017-03-10 2018-03-23 惠科股份有限公司 A kind of display methods and display device

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