CN108847194A - Display device and driving method - Google Patents
Display device and driving method Download PDFInfo
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- CN108847194A CN108847194A CN201810652128.4A CN201810652128A CN108847194A CN 108847194 A CN108847194 A CN 108847194A CN 201810652128 A CN201810652128 A CN 201810652128A CN 108847194 A CN108847194 A CN 108847194A
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- 238000010586 diagram Methods 0.000 description 17
- 239000004973 liquid crystal related substance Substances 0.000 description 15
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- 238000005516 engineering process Methods 0.000 description 2
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- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- 230000009977 dual effect Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
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- 238000002834 transmittance Methods 0.000 description 1
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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
- G09G3/3614—Control of polarity reversal in general
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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
- G09G3/3696—Generation of voltages supplied to electrode 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
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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- Crystallography & Structural Chemistry (AREA)
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- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
Abstract
The invention discloses a display device and a driving method thereof. Firstly, the positive and negative polarity changes between the current frame and the next frame of the pixel array are compared. And then, judging whether a first overvoltage driving lookup table or a second overvoltage driving lookup table is applicable, wherein if the positive and negative polarities between the current frame picture and the next frame picture are not switched, the first overvoltage driving lookup table is applicable, and if the positive and negative polarities between the current frame picture and the next frame picture are switched, the second overvoltage driving lookup table is applicable. And determining a gray scale voltage difference according to the applicable first overvoltage driving lookup table or the second overvoltage driving lookup table. And then, carrying out overvoltage driving on the pixel array by using the gray scale voltage difference. The invention can improve the problem of low gray scale bright and dark lines and improve the image quality.
Description
Technical field
The present invention relates to a kind of actuation techniques of display device more particularly to a kind of display devices with dual-gate framework
And the method for driving.
Background technique
In recent years, with the development of science and technology much different display equipment, such as liquid crystal display (Liquid
Crystal Display, LCD) or electroluminescence (Electroluminescent Display, ELD) show equipment it is extensive
Ground is applied to flat-panel screens.By taking liquid crystal display as an example, liquid crystal display is largely backlight liquid crystal display, be by
Liquid crystal display panel and backlight module (backlight module) are formed.Liquid crystal display panel be by two panels transparent substrate with
And the liquid crystal being enclosed between substrate is constituted.
Existing liquid crystal display usually provides number by multiple pixels (pixel) electrode according to image information respectively
It is believed that number, and the light transmittance of multiple pixel units is controlled to show required image.Particularly, each pixel electrode divides
Other coupling data line and scan line, scan line pass through TFT (Thin Film Transistor, thin film transistor (TFT)) and pixel electrode
Coupling.It is opened by scanning line traffic control TFT, data line is pixel electrode charging.
The driving method of liquid crystal display is usually generated using sequence controller (timing controller) each
Formula controls signal, so that source electrode drive circuit (source driver) and gate drive circuit (gate driver) can drive according to this
Pixel on dynamic panel is to show image.According to the difference of drive mode, the dot structure of liquid crystal display can mainly be divided into
Single gate (single-gate) pixel structure and two kinds of pixel structure of dual-gate (dual-gate).
Under identical resolution ratio, compared to the liquid crystal display using single lock type dot structure, using double-gate type pixel
Scan line (scan line) number of the liquid crystal display of structure can be double, i.e. gate drive number of chips is double, and data line
(data line) number then halves, i.e. source driving chip quantity halves.Since the cost and power consumption of gate drive chip are equal
Compared with source driving chip be it is low, using double-gate type dot structure design can reduce production cost and power consumption, therefore current liquid crystal
Display largely uses double-gate type pixel structure.Also, for image quality, double-gate type pixel structure would generally arrange in pairs or groups column inversion or row
Inversion mode drives, but also brings along the bright concealed wire problem under low ash rank in this way.
Summary of the invention
The invention proposes a kind of display device and its driving method, the bright concealed wire of low ash rank can be solved the problems, such as, and promoted
Image quality.
The present invention proposes a kind of driving method, in a display device, which is characterized in that includes step：Compared pixels
Positive-negative polarity variation between array present frame picture and next frame picture；Judge to be applicable in the first overvoltage drive look-up table or second
Overvoltage drive look-up table, wherein if being applicable in when switching between the present frame picture and the next frame picture without positive-negative polarity
The first overvoltage drive look-up table is fitted if having positive-negative polarity switching between the present frame picture and the next frame picture
With the second overvoltage drive look-up table；It is searched according to the first be applicable in overvoltage drive look-up table or the second overvoltage drive
Table determines that a gray scale voltage is poor；And overvoltage drive is carried out to the pixel array with the gray scale voltage difference.
In one embodiment of this invention, the pixel array has dual-gate framework.
In one embodiment of this invention, a step is further included:Compare the present frame picture and the next frame picture
Between grey scale.
In one embodiment of this invention, corresponding to the grey scale of identical numerical value, second overvoltage drive is searched
The gray scale voltage that table provides is poor, poor greater than the gray scale voltage that the first overvoltage drive look-up table provides.
In one embodiment of this invention, corresponding to the grey scale of identical numerical value, second overvoltage drive is searched
The gray scale voltage that table provides is poor, poor compared to the gray scale voltage provided than the first overvoltage drive look-up table, puts down
Big 8 grayscale.
In addition the present invention also proposes a kind of driving method, special for having in a display device of a dual-gate framework
Sign is, includes step：Grey scale and positive-negative polarity between compared pixels array present frame picture and next frame picture change；If
When switching between the present frame picture and the next frame picture without positive-negative polarity, determined according to the first overvoltage drive look-up table
The first gray scale voltage corresponding to the grey scale is poor；If having positive-negative polarity between the present frame picture and the next frame picture
When switching, determine that the second gray scale voltage for corresponding to the grey scale is poor according to the second overvoltage drive look-up table, wherein corresponding to
The grey scale of identical numerical value, it is poor that the second gray scale voltage difference is greater than first gray scale voltage；With first grayscale
Voltage difference or the second gray scale voltage difference carry out overvoltage drive to the pixel array.
In one embodiment of this invention, corresponding to the grey scale of identical numerical value, the second gray scale voltage difference is big
In poor 8 grayscale of first gray scale voltage.
The present invention and propose a kind of display device, which is characterized in that include：One pixel array has a dual-gate frame
Structure includes multiple red sub-pixel rows, multiple green sub-pixels rows and multiple blue subpixels row sequentials；And one ratio
Compared with module, for the positive-negative polarity variation between the pixel array present frame picture and next frame picture；One judgment module,
For judging to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table, wherein if the present frame picture and institute
It states when switching between next frame picture without positive-negative polarity, the first overvoltage drive look-up table is applicable in, if the present frame picture
When having positive-negative polarity switching between the next frame picture, it is applicable in the second overvoltage drive look-up table；One data line signal mould
Block, according to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table, one gray scale voltage of generation is poor, to institute
It states pixel array and carries out overvoltage drive.
In one embodiment of this invention, present frame picture and the next frame picture described in the comparison module and comparison
Between grey scale.
In one embodiment of this invention, corresponding to the grey scale of identical numerical value, second overvoltage drive is searched
The gray scale voltage that table provides is poor, poor greater than the gray scale voltage that the first overvoltage drive look-up table provides.
The problem of concealed wire bright due to effective solution dual-gate framework display device picture, so provided by the invention aobvious
The picture of showing device can maintain uniform brightness, and picture effect also can be able to be expansion.Further, since being directed to the polarity of charging voltage
Variation, using different gray scale voltages, to accelerate to reach expected charge target, therefore, the whole average noon for showing picture
It can shorten between seasonable, further promote the quality of display picture.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, it is special below to lift preferred embodiment, and cooperate attached drawing, detailed description are as follows.
Detailed description of the invention
Included attached drawing is used to provide that a further understanding of the embodiments of the present application, and which constitute one of specification
Point, for illustrating presently filed embodiment, and with verbal description come together to illustrate the principle of the application.Under it should be evident that
Attached drawing in the description of face is only some embodiments of the present application, for those of ordinary skill in the art, is not paying wound
Under the premise of the property made is laborious, it is also possible to obtain other drawings based on these drawings.In the accompanying drawings：
Fig. 1 is the pel array schematic diagram with dual-gate framework (dual gate).
Fig. 2 is charging voltage signal time diagram.
Fig. 3 is the schematic diagram that bright concealed wire situation occurs for the pixel array of dual-gate framework.
Fig. 4 is a kind of method flow diagram of driving method of the present invention.
Fig. 5 is the method flow diagram of another driving method of the invention.
Fig. 6 is a kind of component Configuration schematic diagram of display device.
Fig. 7 is a kind of overvoltage drive circuit diagram of the present invention.
Fig. 8 is another overvoltage drive circuit diagram of the invention.
Fig. 9 is overvoltage drive of the present invention data signal waveforms figure adjusted
Specific embodiment
Specific structure and function details disclosed herein are only representative, and are for describing the present invention show
The purpose of example property embodiment.The present invention can be implemented by many alternative forms, and be not interpreted as only
It is limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that, term " directly to ", " transverse direction ", "upper", "lower", "left", "right",
The orientation or positional relationship of the instructions such as "inner", "outside" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of retouching
It states the present invention and simplifies description, rather than the device or component of indication or suggestion meaning must have a particular orientation, with specific
Orientation construction and operation, therefore be not considered as limiting the invention.In addition, term " first ", " second " are only used for retouching
Purpose is stated, relative importance is not understood to indicate or imply or implicitly indicates the quantity of indicated technical characteristic.By
This defines " first ", the feature of " second " can explicitly or implicitly include one or more of the features.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " configuration ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
The connection of two component internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Term used herein above is not intended to limit exemplary embodiment just for the sake of description specific embodiment.Unless
Context clearly refers else, otherwise singular used herein above "one", " one " also attempt to include plural number.Also answer
When understanding, term " includes " and/or "comprising" used herein above provide stated feature, integer, step, operation,
The presence of unit and/or component, and do not preclude the presence or addition of other one or more features, integer, step, operation, unit,
Component and/or combination thereof.
Fig. 1 is the pel array schematic diagram with dual-gate framework.As shown in the figure, this pixel array 10 is by multiple sons
Pixel arrangement is constituted at the matrix that a M row x N is arranged.These sub-pixels include red sub-pixel Rs, green sub-pixels Gs
And blue subpixels Bs, and the mode arranged evenly in pixel array 10 is substantially distinguished with going, that is, entire picture
Pixel array be by multiple red sub-pixel rows, multiple green sub-pixels rows and multiple blue subpixels rows, sequentially arrange in turn and
It constitutes.
By taking Fig. 1 as an example, the rows of 10 leftmost side of pixel array, it is considered as the first row, is denoted as C1, sequentially counts to the right
Number, then the rows of 10 rightmost side of pixel array are M row, are denoted as CM.Wherein, the first row sub-pixel C1 is all by red
Sub-pixels Rs is constituted, and the second row sub-pixel C2 is made of green sub-pixels Gs, and the third line sub-pixel C3 is all blue son
Pixel B s is constituted.It is arranged line by line according to the sequence of such red, edge color, blue, and forms the pixel array 10 in Fig. 1.
As for the configuration relation between scan line and signal line and sub-pixel, referring to Fig.1, scan line is the side to be laterally extended
Formula, is configured at the top and lower section of sub-pixel column, be then as signal line by directly to extension in a manner of, be configured at rows
Right side and left side.
Every two rows sub-pixel be controlled by same data line, such as:The red sub-pixel of the first row C1 and the second row C2
Green sub-pixels, be to be controlled by data line Dl；The blue subpixels of the third line C3 and the red sub-pixel of fourth line C4, then
It is to be controlled by data line D2；The blue subpixels of the green sub-pixels of fifth line C5 and the 6th row C6 are by data line D3 institute
Control, and the rest may be inferred.
On the other hand, each column sub-pixel be then controlled by adjacent two scan lines, that is, a column sub-pixel it is upper,
Lower two sides respectively configure a scan line, use the sub-pixel column controlled between this two scan lines.Referring to Fig.1, if picture
The sub-pixel column of 10 the top of pixel array is considered as first row, is denoted as R1, sequentially counts downwards, then pixel array 10 bottom
Sub-pixel column, as Nth column, are denoted as RN.By taking first row sub-pixel R1 as an example, upper and lower sides abut scan line S1 and S2 respectively,
And the sub-pixel in first row sub-pixel R1, then the scan line S1 of the top or scan line S2 of lower section is sequentially connected in turn.Together
Sample, secondary series sub-pixel R2 upper and lower sides abut scan line S3 and S4 respectively, and sub-pixel then sequentially connects scanning overhead in turn
The line S3 or scan line S4 of lower section.
Refer to the charging voltage signal time diagram of Fig. 2, it is shown that the pixel array with dual-gate framework into
The situation of row charging.Wherein, Vcom represents the common electric voltage for being applied to common electrode, and Vpixel is then to represent to be applied to sub-pixel
The charging voltage of its pixel electrode.Since charging voltage Vpixel is alternating voltage, compared to the common electricity as benchmark
Vcom is pressed, polar variation can be generated.As shown in the figure, when charging voltage Vpixel is greater than common electric voltage Vcom, for anode
Property；Conversely, being then negative polarity when charging voltage Vpixel is less than common electric voltage Vcom.
So the variation with charging voltage Vpixel in timing, it may appear that four kinds of situations.For example, in charging procedure
In, the polarity of charging voltage is from positive polarity to positive polarity, such as rectangle region 21 in figure；Or in charging procedure, charging voltage
Polarity is from negative polarity to negative polarity, such as rectangle region 22 in figure；Further it is also possible to there is the polarity of charging voltage by positive sex reversal
Be negative polar situation, such as rectangle region 23 in figure；Or the polarity of charging voltage is changed into the situation of positive polarity by negative polarity, such as
Rectangle region 24 in figure.
It is worth noting that, in above-mentioned charging process, whether from positive polarity to positive polarity, such as rectangle region 21 in figure；
Or from negative polarity to negative polarity, such as rectangle region 22 in figure, due to no cross-pressure or cross-pressure very little, pixel charging will compare
Saturation, brightness will be expected brightness.Conversely, when charging voltage is from positive polarity to negative polarity, or by negative polarity to anode
Property when, cross-pressure when charging is bigger, and because voltage switching is also required to one section the reason of capacitance resistance load (RC loading)
Climb the time, pixel charge ratio is less likely saturated at this time, and expected brightness is not achieved, and leads to luminance shortage and partially dark.
Referring to FIG. 3, this figure shows the bright concealed wire situation of the pixel array of dual-gate framework.Since Fig. 3 is only one brief
Schematic diagram, therefore pixel array 30 be a 12 row x 3 column sub-pixel matrix.This pixel array 30 also has dual-gate frame
Structure is sequentially to be arranged by multiple red sub-pixel rows, multiple green sub-pixels rows and multiple blue subpixels rows and constituted in turn.
In order to make it easy to understand, row and column is to count respectively from the left-to-right of pixel array 30, up to getting off herein.That is, pixel array 30
The rows of the leftmost side be considered as the first row C1, sequentially right count；The sub-pixel column of top side is considered as first row R1, sequentially
It counts downwards.
Red sub-pixel row includes the 1st of pixel array 30 in Fig. 3 the, 4,7,10 rows, be respectively designated as C1, C4, C7,
C10；Green sub-pixels row, then include pixel array 30 in Fig. 3 the 2nd, 5,8,11 rows, be respectively designated as C2, C5, C8,
C11；As for, blue subpixels row, then include pixel array 30 in Fig. 3 the 3rd, 6,9,12 rows, be respectively designated as C3, C6,
C9、C12。
By taking green sub-pixels row C2 and blue subpixels row C3 in Fig. 3 as an example, a shared signal line D2, but its
Sub-pixel in same row is then to be controlled respectively by two different scan lines of its upper and lower sides.For example, with first
The sub-pixel of R1 is arranged, line S1 and S2 is scanned respectively and is controlled；With the sub-pixel in secondary series R2, then respectively be scanned line S3 with
S4 is controlled；With the sub-pixel in third column R3, it is scanned line S5 and S6 respectively and is controlled.
Therefore, when gate signal is inputted one by one by scan line S1 to S6, the time that same row sub-pixel starts to charge will
It there is the two row sub-pixel of left and right for successively causing shared same data line, different polarity switching shapes may be respectively at
State.For example, the charging voltage change in polarity when blue subpixels row C3 sub-pixel is in positive polarity to positive polarity or cathode
Property to negative polarity when, green is as the charging voltage change in polarity of row C2 sub-pixel is but in positive polarity to negative polarity or bears
Polarity causes the charging of green sub-pixels row C2 pixel to be not easy to be saturated to the switching of positive polarity, and be not achieved expected brightness and
It is partially dark.Finally, bright concealed wire as shown in Figure 3 can be led to the problem of, wherein the sub-pixel charge condition of odd-numbered line is more satisfactory,
Therefore bright line is presented；But the sub-pixel of even number line charge it is unsaturated, luminance shortage and generate concealed wire 32.In particular, when picture exists
Under low ash rank, the case where this bright concealed wire, can be more obvious.
Fig. 4 is referred to, Fig. 4 is a kind of method flow diagram of driving method of the present invention.It is aobvious to can be used for one for such driving method
Showing device can be especially useful in the display device with a dual-gate framework.The step of driving method, is described as follows.Firstly,
Positive-negative polarity between compared pixels array present frame picture and next frame picture changes (step 11).Secondly, according to positive-negative polarity
Whether change, judges to be applicable in the first overvoltage drive look-up table (OD Table) or the second overvoltage drive look-up table (OD Table)
(step 12).Wherein, if switch between the present frame picture and the next frame picture without positive-negative polarity, it is applicable in described the
One overvoltage drive look-up table is applicable in institute if having positive-negative polarity switching between the present frame picture and the next frame picture
State the second overvoltage drive look-up table.Then, it is searched according to the first be applicable in overvoltage drive look-up table or the second overvoltage drive
Table determines the poor (step 13) of a gray scale voltage.Then, overvoltage drive is carried out to the pixel array with the gray scale voltage difference
(step 14).
In one embodiment, pixel array described in step 1, it is identical as pixel array shown in Fig. 1, that is,
For the pixel array with dual-gate framework.
In another embodiment, it can increase by a step before and after carrying out the step 1 or simultaneously:Compare described current
Grey scale between frame picture and the next frame picture.
In addition, corresponding to the grey scale of identical numerical value, the gray scale voltage that the second overvoltage drive look-up table provides is poor, greatly
It is poor in the gray scale voltage that the first overvoltage drive look-up table provides.In one embodiment, corresponding to the grey scale of identical numerical value,
The gray scale voltage that second overvoltage drive look-up table provides is poor, poor compared to the gray scale voltage that the first overvoltage drive look-up table provides,
Average big 8 grayscale or so.
Fig. 5 is referred to, Fig. 5 shows the method flow diagram of driving method in another embodiment of the invention.Driving side
The step of method, is described as follows.Firstly, grey scale and positive-negative polarity between compared pixels array present frame picture and next frame picture
Change (step 21).If switch between the present frame picture and next frame picture without positive-negative polarity, driven according to the first over-voltage
Dynamic look-up table determines the poor (step 22) of the first gray scale voltage for corresponding to the grey scale.If the present frame picture and it is described under
When having positive-negative polarity switching between one frame picture, the second ash for corresponding to the grey scale is determined according to the second overvoltage drive look-up table
Rank voltage difference, wherein corresponding to the grey scale of identical numerical value, the second gray scale voltage difference is greater than the first grayscale electricity
Pressure difference (step 23).Finally, being carried out with the first gray scale voltage difference or the second gray scale voltage difference to the pixel array
Overvoltage drive (step 24).
In one embodiment, corresponding to the grey scale of identical numerical value, the second gray scale voltage difference can averagely be greater than
Described poor 8 grayscale of first gray scale voltage or so.
Fig. 6 is referred to, Fig. 6 shows a kind of component Configuration schematic diagram of display device 6.This display device 6 contains a picture
Pixel array 60, a comparison module 61, a judgment module 62 and a data line signal module 63.Wherein, pixel array 60 has
Dual-gate framework constitutes the detailed arrangement and connection relationship of component, reference can be made to pixel array 10 shown in Fig. 1, also that is,
This pixel array 60, the pixel array 10 being identical in Fig. 1 include multiple red sub-pixel rows, multiple green of sequential
Sub-pixels row and multiple blue subpixels rows.
In addition, comparison module 61, then be used to positive and negative between the pixel array present frame picture and next frame picture
Change in polarity.In one embodiment, the comparison module 61 and can be between the present frame picture and the next frame picture
Grey scale.
Judgment module 62 is then used to judge to be applicable in the first overvoltage drive look-up table T1 or the second overvoltage drive look-up table
T2.Wherein, if switch between the present frame picture and the next frame picture without positive-negative polarity, it is applicable in first over-voltage
Drive look-up table T1；Conversely, if being applicable in described when having positive-negative polarity switching between the present frame picture and the next frame picture
Second overvoltage drive look-up table T2.In one embodiment, corresponding to the grey scale of identical numerical value, the second overvoltage drive look-up table T2
The gray scale voltage of offer is poor, poor greater than the gray scale voltage that the first overvoltage drive look-up table T1 is provided.In one embodiment, correspond to
The grey scale of identical numerical value, the second gray scale voltage difference are greater than poor 8 grayscale of the first gray scale voltage or so.
As for data line signal module 63 then can be according to the first be applicable in overvoltage drive look-up table T1 or the second mistake
Pressure driving look-up table T2, one gray scale voltage of generation is poor, carries out overvoltage drive to the pixel array.
Refer to Fig. 7, a kind of overvoltage drive circuit diagram of Fig. 7 display present invention.This overvoltage drive circuit 7 contains a picture
Input unit 71, a controller 72, a memory 73, an overvoltage drive look-up table 74, time schedule controller 75 and a pixel
Array 76.Wherein, pixel array 76 has dual-gate framework, the detailed arrangement and connection relationship of component is constituted, reference can be made to Fig. 1
In shown pixel array 10, also that is, this pixel array 76, the pixel array 10 being identical in Fig. 1, include sequential
Multiple red sub-pixel rows, multiple green sub-pixels rows and multiple blue subpixels rows.
Picture data is inputted and is respectively sent to controller 72 and overvoltage drive look-up table 74 by picture input unit 71.Extremely
In overvoltage drive look-up table 74 has included at least the first overvoltage drive look-up table T1 and the second overvoltage drive look-up table T2.Control
Picture data is transmitted and is stored in memory 73 by device 72, and compares the change of the positive-negative polarity between present frame picture and next frame picture
Change, judges to be applicable in the first overvoltage drive look-up table T1 or the second overvoltage drive look-up table T2.Then, sequence controller 75 can incite somebody to action
Overvoltage drive data-signal adjusted, is sent to pixel array 76, carries out overvoltage drive to the pixel array.
Refer to Fig. 8, another overvoltage drive circuit diagram of Fig. 8 display present invention.This overvoltage drive circuit 8 mainly contains
One overvoltage drive processing unit 80, a judging unit 82, the first overvoltage drive look-up table T1, the second overvoltage drive look-up table T2,
First switch M1, second switch M2.
When sequence controller work, present frame picture will record, and be compared with next frame picture.At this point, judgement
It when unit 82 switches between before and after frames picture without positive-negative polarity, judges using the first overvoltage drive look-up table T1, and exports
First controls the control terminal of signal to first switch M1 and second switch M2.At this point, first switch M1 is opened, second switch M2 is closed
It closes, therefore, overvoltage drive processing unit 80 can read number from the first overvoltage drive look-up table T1 according to data to be processed
According to, then output overvoltage driving data-signal adjusted.
Conversely, judging unit 82 then judges using the second overvoltage drive when having positive-negative polarity switching between before and after frames picture
Look-up table T2, and export the control terminal of the second control signal to first switch M1 and second switch M2.At this point, second switch M2 is opened
It opens, first switch M1 is closed, and therefore, overvoltage drive processing unit 80 can be looked into according to data to be processed from the second overvoltage drive
It looks in table T2 and reads data, then output overvoltage drives data adjusted.
In one embodiment, as shown in figure 8, the first switch M1 is a P-type transistor, the second switch M2 is one
N-type transistor.At this point, the first control signal is a low level signal, to open first switch M1 and close second switch M2；
As for the second control signal is then a high level signal, to open second switch M2 and close first switch M1.
Second overvoltage drive look-up table T2 is compared with the data in the first overvoltage drive look-up table T1, for identical grayscale
Difference, the voltage difference increased in the second overvoltage drive look-up table T2, the voltage difference being greater than in the first overvoltage drive look-up table T1.Also
That is, liquid crystal molecule deflects to the speed of target angle faster when using the second overvoltage drive look-up table T2.In one embodiment
Gray scale voltage difference in two overvoltage drive look-up table T2 big 8 ashes poorer than gray scale voltage in the first overvoltage drive look-up table T1
Rank.
Fig. 9 is referred to, Fig. 9 is a waveform diagram, is shown in the present invention through overvoltage drive data signal waveforms adjusted.With
For same pending data, after being handled using the first overvoltage drive look-up table T1, actual signal output waveform is in Fig. 9
Waveform 91；After being handled using the second overvoltage drive look-up table T2, actual signal output waveform is then waveform 92 in Fig. 9.Its
In, the crest voltage of waveform 91 is C1, and the crest voltage of waveform 92 is then higher C2, it is shown that is looked into using the second overvoltage drive
Table T2 is looked for treated signal voltage, it can be bigger than using the signal voltage of the first overvoltage drive look-up table T1.
In one embodiment, the voltage difference of the crest voltage C1 of the crest voltage C2 and waveform 91 of waveform 92, as first
The difference of 8 grayscale of data in overvoltage drive look-up table T1 and the second overvoltage drive look-up table T2, about 0.2 volt.Value
It is noted that the charge efficiency of pixel is related with the area of waveform in Fig. 9 in time t, i.e., the hatched example areas face in figure
Product.Waveform area is bigger, and charging efficiency is better.Because the crest voltage C2 of waveform 92 is greater than the crest voltage C1 of waveform 91, institute
It is greater than the area of waveform 91 with the area of waveform 92, that is, the charge efficiency of waveform 92 is higher than the charge efficiency of waveform 91.
In above-mentioned driving method and display device, it is contemplated that the situation of its change in polarity of charging voltage, and use
Different overvoltage drive look-up tables, it is poor come the gray scale voltage that provides different.Therefore, its parity rows of pixel array can effectively be balanced
Between charge efficiency, and then compensate because of charging voltage switching time for losing of climbing, and imitate the charging of parity rows pixel
Fruit reaches the same.When making charging voltage by positive polarity to negative polarity or negative polarity to positive polarity, charging effect can also reach pre-
Phase, brightness reach desired value, without partially secretly, to solve the problems, such as the bright concealed wire of low ash rank, and promoting the picture product of display device
Matter.
Due to poor using the gray scale voltage in different overvoltage drive look-up tables, the charge efficiency of balance odd even in the ranks is come
It compensates because the time that voltage switching climbing loses makes positive polarity to negative polarity or cathode so that charging effect be made to reach the same
Property to positive polarity when, charging can also reach expected, and brightness reaches desired value, rather than partially dark.To solve the bright concealed wire of low ash rank
Problem promotes picture quality.Furthermore the problem of concealed wire bright due to effective solution dual-gate framework display device picture, institute
Uniform brightness can be maintained with the picture of display device, picture effect also can be able to be expansion.Further, since for charging voltage
Change in polarity, it is therefore, whole to show the flat of picture to accelerate to reach expected charge target using different gray scale voltages
It can shorten between equal noon is seasonable, further promote the quality of display picture.
The above described is only a preferred embodiment of the present invention, be not intended to limit the present invention in any form, though
So the present invention has been disclosed as a preferred embodiment, and however, it is not intended to limit the invention, any technology people for being familiar with this profession
Member, without departing from the scope of the present invention, when the method and technique content using the disclosure above make it is a little more
Equivalent embodiment that is dynamic or being modified to equivalent variations, but anything that does not depart from the technical scheme of the invention content, according to the present invention
Technical spirit any simple modification, equivalent change and modification to the above embodiments, still fall within technical solution of the present invention
In the range of.
Claims (10)
1. a kind of driving method of display device, which is characterized in that include step：
Positive-negative polarity variation between compared pixels array present frame picture and next frame picture；
Judge to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table, wherein if the present frame picture and institute
It states when switching between next frame picture without positive-negative polarity, the first overvoltage drive look-up table is applicable in, if the present frame picture
When having positive-negative polarity switching between the next frame picture, it is applicable in the second overvoltage drive look-up table；
According to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table, determine that a gray scale voltage is poor；With
And
Overvoltage drive is carried out to the pixel array with the gray scale voltage difference.
2. the driving method of display device as described in claim 1, which is characterized in that the pixel array has dual-gate frame
Structure.
3. driving method as described in claim 1, which is characterized in that further include a step:Compare the present frame picture with
Grey scale between the next frame picture.
4. driving method as claimed in claim 3, which is characterized in that corresponding to the grey scale of identical numerical value, described the
The gray scale voltage that two overvoltage drive look-up tables provide is poor, the grayscale provided greater than the first overvoltage drive look-up table
Voltage difference.
5. driving method as claimed in claim 3, which is characterized in that corresponding to the grey scale of identical numerical value, described the
The gray scale voltage that two overvoltage drive look-up tables provide is poor, described in providing than the first overvoltage drive look-up table
Gray scale voltage is poor, average big 8 grayscale.
6. a kind of driving method, which is characterized in that include step：
Grey scale and positive-negative polarity between compared pixels array present frame picture and next frame picture change；
If switch between the present frame picture and the next frame picture without positive-negative polarity, searched according to the first overvoltage drive
The first gray scale voltage that voting corresponds to the grey scale surely is poor；
If have positive-negative polarity switching between the present frame picture and the next frame picture, according to the second overvoltage drive look-up table
Determine that the second gray scale voltage for corresponding to the grey scale is poor, wherein correspond to the grey scale of identical numerical value, described second
It is poor that gray scale voltage difference is greater than first gray scale voltage；
Overvoltage drive is carried out to the pixel array with the first gray scale voltage difference or the second gray scale voltage difference.
7. driving method as claimed in claim 6, which is characterized in that corresponding to the grey scale of identical numerical value, described the
Two gray scale voltage differences are greater than poor 8 grayscale of first gray scale voltage.
8. a kind of display device, which is characterized in that include：
One pixel array has a dual-gate framework, includes multiple red sub-pixel rows, multiple green sub-pixels rows and multiple
Blue subpixels row sequential；
One comparison module, for the positive-negative polarity variation between the pixel array present frame picture and next frame picture；
One judgment module, for judging to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table, wherein if institute
When stating between present frame picture and the next frame picture without positive-negative polarity switching, it is applicable in the first overvoltage drive look-up table,
If have positive-negative polarity switching between the present frame picture and the next frame picture, it is applicable in second overvoltage drive and searches
Table；
One data line signal module is produced according to be applicable in the first overvoltage drive look-up table or the second overvoltage drive look-up table
A raw gray scale voltage is poor, carries out overvoltage drive to the pixel array.
9. display device as claimed in claim 8, which is characterized in that the comparison module is drawn for the present frame
Grey scale between face and the next frame picture.
10. display device as claimed in claim 9, which is characterized in that corresponding to the grey scale of identical numerical value, described the
The gray scale voltage that two overvoltage drive look-up tables provide is poor, the grayscale provided greater than the first overvoltage drive look-up table
Voltage difference.
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| CN201810652128.4A CN108847194A (en) | 2018-06-22 | 2018-06-22 | Display device and driving method |
| PCT/CN2018/105072 WO2019242118A1 (en) | 2018-06-22 | 2018-09-11 | Display device and driving method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810652128.4A CN108847194A (en) | 2018-06-22 | 2018-06-22 | Display device and driving method |
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| WO (1) | WO2019242118A1 (en) |
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