CN110299115A - Over-driving method and sequence controller - Google Patents
Over-driving method and sequence controller Download PDFInfo
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- CN110299115A CN110299115A CN201810245071.6A CN201810245071A CN110299115A CN 110299115 A CN110299115 A CN 110299115A CN 201810245071 A CN201810245071 A CN 201810245071A CN 110299115 A CN110299115 A CN 110299115A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3607—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
Abstract
A kind of over-driving method and sequence controller are suitable for liquid crystal display panel.Over-driving method includes: detecting the picture frame speed of liquid crystal display panel, this picture frame speed corresponds to the over-drive value of liquid crystal display panel；And when determining picture frame speed change, correspondingly change over-drive value, and driving operation is carried out to liquid crystal display panel with the over-drive value after changing.
Description
Technical field
The present invention relates to a kind of over-driving method and sequence controllers, and in particular to a kind of for liquid crystal display panel
Over-driving method and sequence controller.
Background technique
Liquid crystal display is one of the main product in current display scientific and technological industry field.For liquid crystal display,
In the broadcasting of motion video, if the reaction speed of liquid crystal molecule is excessively slow, then it will lead to picture on the move and mobile mould be presented
The phenomenon that paste.In view of this, overdrive technique can be used in the broadcasting of motion video in liquid crystal display, to solve reaction speed
Cross slow problem.However, overdrive technique might have under different conditions influence display quality the phenomenon that generation, such as
It might have out luminous intensity when picture frame speed changes or when grayscale value changes to change excessive and cause asking for user experience reduction
Topic.
Summary of the invention
An aspect of of the present present invention is to be to provide a kind of over-driving method and sequence controller for liquid crystal display panel,
It can promote image display quality of the liquid crystal display panel when picture frame speed changes and the image when grayscale value changes is aobvious
Show quality.
Above-mentioned purpose according to the present invention proposes a kind of over-driving method for liquid crystal display panel, this side of overdriving
Method includes: detecting the picture frame speed of liquid crystal display panel, this picture frame speed corresponds to the over-drive value of liquid crystal display panel；With
And when determining picture frame speed change, correspondingly change over-drive value, and with the over-drive value after change to LCD display
Plate carries out driving operation.
One or more embodiments according to the present invention, the above-mentioned over-drive value that correspondingly changes includes: fast in determining picture frame
When rate increases, correspondingly increase over-drive value；And when determining picture frame speed reduces, correspondingly reduce over-drive value.
One or more embodiments according to the present invention, the mistake corresponding to i-th of picture frame after the change of above-mentioned picture frame speed
Driving value is ODO+[i(ODC-ODO)/N], wherein i is positive integer, ODOOver-drive value before changing for above-mentioned picture frame speed, ODC
Target over-drive value after changing for above-mentioned picture frame speed, N reach target over-drive value when institute after changing for above-mentioned picture frame speed
The picture frame number of process, and i≤N.
Above-mentioned purpose according to the present invention separately proposes a kind of over-driving method for liquid crystal display panel, this overdrives
Method includes: according to the previous grayscale value and current gray value of liquid crystal display panel, obtaining corresponding to previous grayscale from look-up table
The over-drive value of value and current gray value；Difference according to previous grayscale value and current gray value determines the first yield value；Foundation
Current gray value determines the second yield value；And to over-drive value, the first yield value and the second yield value carry out operation, then with
Result after operation updates over-drive value, and carries out driving operation to liquid crystal display panel with updated over-drive value.
One or more embodiments according to the present invention, above-mentioned previous grayscale value and above-mentioned current gray value be more than or equal to
0 and less than 2NPositive integer, and N be 8 or 10.
The difference of one or more embodiments according to the present invention, above-mentioned previous grayscale value and above-mentioned current gray value be less than or
Equal to 32.
The each of one or more embodiments according to the present invention, above-mentioned first yield value and above-mentioned second yield value is greater than
0 and be less than or equal to 1.
One or more embodiments according to the present invention, above-mentioned second yield value are the concave function, gradually of above-mentioned current gray value
Subtraction function or cumulative function.
Above-mentioned purpose according to the present invention separately proposes a kind of sequence controller, and sequence controller is suitable for liquid crystal display at this time
Panel and include that picture frame speed detection unit and over-drive value generate unit.Picture frame speed detection unit is to detect liquid crystal display
The picture frame speed of panel, this picture frame speed correspond to the over-drive value of liquid crystal display panel.Over-drive value generate unit to
It is determined when picture frame speed changes in picture frame speed detection unit and correspondingly changes and export over-drive value, to LCD display
Plate carries out driving operation.
Above-mentioned purpose according to the present invention separately proposes a kind of sequence controller, and sequence controller is suitable for liquid crystal display at this time
Panel and include that over-drive value generates unit and over-drive value adjustment unit.Over-drive value generates unit to obtain from look-up table
To the previous grayscale value of corresponding liquid crystal display panel and the over-drive value of current gray value, and according to previous grayscale value and current ash
The difference of rank value determines the first yield value and determines the second yield value according to current gray value.Over-drive value adjustment unit is to right
Over-drive value, the first yield value and the second yield value carry out operation, then update over-drive value with the result after operation, and with more
Over-drive value after new carries out driving operation to liquid crystal display panel.
Detailed description of the invention
In order to more completely understand embodiment and its advantage, done described below referring now to Figure of description, in which:
Fig. 1 is the block diagram that the over-drive value of some embodiments according to the present invention generates；
The relationship of picture frame serial number and over-drive value shows when Fig. 2 is the picture frame speed change of some embodiments according to the present invention
It is intended to；
Fig. 3 is the block diagram that the over-drive value of some embodiments according to the present invention generates；
Fig. 4 is the schematic diagram of the look-up table of some embodiments according to the present invention；
Fig. 5 is the difference of the previous grayscale value of some embodiments and current gray value according to the present invention and the first yield value
Correspondence table；And
Fig. 6 is the correspondence table of the second yield value Yu previous grayscale value of some embodiments according to the present invention.
Description of symbols:
110 picture frame speed detection units
120,310 over-drive values generate unit
130,320 look-up table
330 over-drive value adjustment units
Cur current gray value
The previous grayscale value of Pre
Specific embodiment
The embodiment of the present invention is hashed out below.It is understood, however, that embodiment provides many applicable hairs
Bright concept may be implemented in miscellaneous specific content.The specific embodiment discussed only for explanation, is not limited to
The scope of the present invention.
Fig. 1 is please referred to, Fig. 1 is the block diagram of (overdrive) the value generation of overdriving of some embodiments according to the present invention.
Block diagram shown in FIG. 1 includes picture frame speed detection unit 110, over-drive value generation unit 120 and look-up table 130, is used for
The processing of overdriving of liquid crystal display panel.In some embodiments, the processing of overdriving of liquid crystal display panel is in sequence controller
Middle progress, i.e. picture frame speed detection unit 110, over-drive value generate unit 120 and the memory for storing look-up table 130
It is respectively positioned in sequence controller.
Picture frame speed detection unit 110 detects the picture frame speed of liquid crystal display panel to receive drawing frame data accordingly,
And picture frame speed data to over-drive value is sent out according to testing result and generates unit 120.Over-drive value generates unit 120 according to connecing
The picture frame speed data received differentiate whether the picture frame speed of display device changes.If determining the picture frame speed of display device
Change, then over-drive value generates over-drive value of the unit 120 according to the data change output in look-up table 130, and is changed with this
Over-drive value afterwards carries out driving operation to liquid crystal display panel.
Specifically, increase if determining picture frame speed, then over-drive value generates unit 120 according in look-up table 130
The data of the corresponding picture frame speed changed generate new over-drive value, and it is defeated that this new over-drive value is greater than institute before picture frame speed changes
Over-drive value out.Relatively, if determining picture frame speed reduction, then over-drive value generates unit 120 according to look-up table 130
The data of the middle corresponding picture frame speed changed generate new over-drive value, before this new over-drive value has not been changed less than picture frame speed
The over-drive value exported.
In some embodiments, over-drive value generates unit 120 to first drawing frame data after picture frame speed changes
Used over-drive value is the data of the corresponding picture frame speed changed, i.e., corresponding target over-drive value.However, in picture frame
In the case of rate change is excessive, the over-drive value before target over-drive value and picture frame speed change has the possibility having big difference.
In this case, if directly using first after the target over-drive value to picture frame speed change of the corresponding picture frame speed changed
In a drawing frame data, then will because over-drive value short time (being herein a picture frame period) change it is excessive due to influence liquid crystal display
The image display quality of panel.
Therefore, in order to avoid generating the problem of influencing image display quality, in further embodiments, over-drive value is generated
Unit 120 progressively changes the target over-drive value of over-drive value to the corresponding picture frame speed changed after picture frame speed change.
In other words, over-drive value generates unit 120 and overdrives to caused by the several drawing frame datas of head after picture frame speed changes
Value be it is cumulative or decrescence, until reaching target over-drive value.
Over-drive value is after picture frame speed change to during reaching the target over-drive value for corresponding to the picture frame speed changed
It can be linear change.Specifically, if the picture frame of N of the over-drive value after picture frame speed change reaches target and overdrives
Value, then the over-drive value corresponding to i-th of picture frame after picture frame speed change is ODO+[i(ODC-ODO)/N], wherein i is
Positive integer and be less than or equal to N, ODOOver-drive value before changing for picture frame speed, and ODCFor the corresponding picture frame speed changed
Target over-drive value.
It should be noted that above-mentioned N value and ODCValue can be according to the corresponding adjustment of the characteristic of liquid crystal display panel, such as liquid crystal
Show the resolution ratio, unit pixel number and orientation type etc. of panel.In addition, according to different design and application demand, at other
In embodiment, over-drive value is after picture frame speed change to during reaching the target over-drive value for corresponding to the picture frame speed changed
It can be non-thread sexually revise.
Fig. 2 shows the relationships of picture frame serial number and over-drive value when picture frame speed change.In this example, over-drive value generates
The over-drive value that 9th frame of the unit 120 after picture frame speed change is exported is target over-drive value, and picture frame speed is
The target over-drive value arrived corresponding to 120fps is 200.As shown in Fig. 2, that is, picture frame speed is before picture frame speed change
When 60fps (60 picture frames per second), over-drive value 128；After picture frame speed increases to 120fps, over-drive value is with every picture frame
Increase by 8 for unit, i.e. the over-drive value of picture frame number FN+1 increases to 136, and the over-drive value of picture frame number FN+2 increases to
144 ... the rest may be inferred, until the over-drive value of picture frame number FN+9 increases to 200.
Referring to figure 3., Fig. 3 is the block diagram of the over-drive value generation of some embodiments according to the present invention.Side shown in Fig. 3
Block diagram includes that over-drive value generates unit 310, look-up table 320 and over-drive value adjustment unit 330, is used for liquid crystal display panel
Processing of overdriving.In some embodiments, the processing of overdriving of liquid crystal display panel carries out in sequence controller, that is, crosses and drive
Dynamic value generates unit 310, over-drive value adjustment unit 330 and the memory for storing look-up table 320 and is respectively positioned on timing control
In device processed.
Over-drive value generates unit 310 and receives the data of adjacent two picture frame, and obtains pair according to the data in look-up table 320
Answer the over-drive value of the data of this adjacent two picture frame.Specifically, the data of this two picture frame are respectively the previous ash of previous picture frame
The current gray value of rank value and current picture frame, and over-drive value generates unit 310 and looks for this corresponding previous ash in look-up table 320
The over-drive value of rank value and this current gray value.
In addition, over-drive value, which generates difference of the unit 310 also according to previous grayscale value and current gray value, determines the first increasing
Benefit value, and the second yield value is determined according to current gray value.After obtaining the first yield value and the second yield value, over-drive value adjustment
Unit 330 again carries out the over-drive value and the first yield value that obtain according to the data in look-up table 320 and the second yield value
Operation, such as over-drive value is multiplied by the first yield value multiplied by the second yield value, it is then updated with the result after operation again
Driving value, and driving operation is carried out to liquid crystal display panel with updated over-drive value.
In some embodiments, over-drive value adjustment unit 330 only carries out the lower over-drive value of grayscale value knots modification
Adjustment.In other words, over-drive value adjustment unit 330 is only to meeting the difference of previous grayscale value and current gray value less than one
Corresponding over-drive value is adjusted under conditions of threshold value.For example, in certain embodiments, meeting previous grayscale
Under conditions of the difference of value and current gray value is less than 32, driving value generates unit 310 and adjusts to corresponding over-drive value
It is whole.First yield value and the second yield value are all larger than 0 and are less than or equal to 1, so that updated driving value can be lower than look-up table
Over-drive value in 320.In this way, which lower over-drive value pair can be used in the case of grayscale value change degree is lower
Liquid crystal display panel carries out driving operation, avoids the luminous intensity out of liquid crystal display panel from changing excessive, and then promote liquid crystal display
The image display quality of panel.
It should be noted that above-mentioned threshold value, the first yield value and the second yield value can be according to the characteristics pair of liquid crystal display panel
It should adjust, such as grayscale bit number, resolution ratio, unit pixel number, orientation type and picture frame speed of liquid crystal display panel etc..
For example, it is 8 or 10 (i.e. grayscale values that the adjustment mode of above-mentioned over-drive value, which can be applicable to the grayscale bit number of each sub-pixel,
Be 0 to 255 or 0 to 1023) liquid crystal display panel and/or the second yield value can be the concave function, decrescence of current gray value
Function or cumulative function, but not limited to this.
In addition, in some embodiments, it can be to the difference and current gray value point of previous grayscale value and the current grayscale value
Not carry out interpolation arithmetic, and interpolation arithmetic result respectively corresponds specific first yield value and the second yield value, by Yu Houxu
It is illustrated in paragraph.
Illustrate the box that over-drive value shown in Fig. 3 generates for being applied to the liquid crystal display device of 8 bits below
Figure.Fig. 4 is the schematic diagram of the look-up table of some embodiments according to the present invention.As shown in figure 4, previous grayscale value and the current gray
Value is all the numerical value quantified, and over-drive value generation unit 310 is little in the difference of previous grayscale value and the current grayscale value
Over-drive value is adjusted in the case of 32, this adjustment mode will be illustrated in Fig. 5 and Fig. 6.Relatively, in previous ash
Rank value and the difference of the current grayscale value are greater than in the case of 32, and over-drive value, which generates unit 310, can directly be stored in lookup
Correspondence over-drive value in table 320 carries out driving operation to liquid crystal display panel.
Fig. 5 is that the difference of the previous grayscale value Pre and current gray value Cur of some embodiments increase with first according to the present invention
The correspondence table of benefit value.In the table of Fig. 5, previous grayscale value PreWith the difference of current gray value Cur (i.e. Δ | Pre-
Cur |) field has 9 default values, and these default values have corresponding first yield value.In addition, Fig. 6 is according to this
Invent the current gray value Cur of some embodiments and the correspondence table of the second yield value.In the table of Fig. 6, current ash
Rank, which is worth field, has 9 default values, and these default values have corresponding second yield value.
Over-drive value adjustment unit 330 can carry out linear interpolation arithmetic using the correspondence table of Fig. 5 and Fig. 6, with
To the first yield value and the second yield value.For example, if previous grayscale value and current gray value difference 16 and 32, then foundation
Fig. 5 and content shown in fig. 6, the first yield value and the second yield value that over-drive value adjustment unit 330 obtains are respectively 0.65
With 0.75；If previous grayscale value and current gray value difference 38 and 48, then according to Fig. 5 and content shown in fig. 6, over-drive value
The first yield value and the second yield value that adjustment unit 330 obtains be respectively 2 × 0.75/4+2 × 0.7/4=0.725 and 16 ×
0.75/32+16 × 0.875/32=0.8125.In addition, in other embodiments, over-drive value adjustment unit 330 can utilize Fig. 5
Non-linear interpolation operation is carried out with the correspondence table of Fig. 6.
It should be noted that content shown in above-mentioned fig. 4 to fig. 6 is merely illustrative, rather than to limit the scope of the invention.It lifts
For example, the size of look-up table 320 can be 33 × 33, and the difference field or current ash of previous grayscale value and current gray value
Rank value field may include 17 kinds of default values, i.e., the quantity and/or spacing of default value can be corresponding according to design and application demand
Change.In addition, above-mentioned Fig. 5 and correspondence table shown in fig. 6 can be stored in together depositing for sequence controller with look-up table 320
In reservoir.
Change in conclusion over-driving method and sequence drivers of the invention can promote liquid crystal display panel in picture frame speed
Image display quality when change and when grayscale value changes.
Although the present invention is disclosed as above with embodiment, however, it is not to limit the invention, any technical field
Middle technical staff without departing from the spirit and scope of the invention, can make a little variation and retouch, therefore protection of the invention
Range is subject to view claim.
Claims (10)
1. a kind of over-driving method is suitable for a liquid crystal display panel, which includes:
Detect a picture frame speed of the liquid crystal display panel, what which corresponded to the liquid crystal display panel one overdrives
Value；And
When determining picture frame speed change, correspondingly change the over-drive value, and with the over-drive value after change to this
Liquid crystal display panel carries out driving operation.
2. over-driving method as described in claim 1, wherein correspondingly changing the over-drive value and including:
When determining the picture frame speed and increasing, correspondingly increase the over-drive value；And
When determining the picture frame speed reduces, the over-drive value is correspondingly reduced.
3. over-driving method as claimed in claim 1 or 2, wherein corresponding to i-th of picture frame after picture frame speed change
Over-drive value be ODO+[i(ODC-ODO)/N], wherein i is positive integer, ODOOver-drive value before changing for the picture frame speed,
ODCA target over-drive value after changing for the picture frame speed, N are when reaching the target over-drive value after the picture frame speed changes
The picture frame number passed through, and i≤N.
4. a kind of over-driving method is suitable for a liquid crystal display panel, which includes:
According to the previous grayscale value and a current gray value of the liquid crystal display panel, obtain corresponding to this from a look-up table previous
One over-drive value of grayscale value and the current grayscale value；
A difference according to the previous grayscale value and the current grayscale value determines one first yield value；
One second yield value is determined according to the current grayscale value；And
Operation is carried out to the over-drive value, first yield value and second yield value, then updating with the result after operation should
Over-drive value, and driving operation is carried out to the liquid crystal display panel with the updated over-drive value.
5. over-driving method as claimed in claim 4, wherein the previous grayscale value and the current grayscale value are more than or equal to 0
And less than 2NPositive integer.
6. over-driving method as claimed in claim 4, wherein the difference of the previous grayscale value and the current grayscale value be less than or
Equal to 32.
7. the over-driving method as described in any in claim 4 to 6, wherein first yield value and second yield value
Each is greater than 0 and is less than or equal to 1.
8. the over-driving method as described in any in claim 4 to 6, wherein second yield value is the current grayscale value
One concave function, a decrescent function or a cumulative function.
9. a kind of sequence controller is suitable for a liquid crystal display panel, which includes:
One picture frame speed detection unit, to detect a picture frame speed of the liquid crystal display panel, which is corresponded to
One over-drive value of the liquid crystal display panel；And
One over-drive value generates unit, correspondingly changes to determine when the picture frame speed changes in the picture frame speed detection unit
Become and export the over-drive value, to carry out driving operation to the liquid crystal display panel.
10. a kind of sequence controller is suitable for a liquid crystal display panel, which includes:
One over-drive value generate unit, to obtain corresponding to from a look-up table liquid crystal display panel a previous grayscale value and
One over-drive value of one current gray value, and the difference according to the previous grayscale value and the current grayscale value determines one first increasing
Beneficial value and one second yield value is determined according to the current grayscale value；And
One over-drive value adjustment unit connects to carry out operation to the over-drive value, first yield value and second yield value
The over-drive value is updated with the result after operation, and the liquid crystal display panel is driven with the updated over-drive value
Operation.
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| CN113178178A (en) | 2021-07-27 |
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