CN101083065A - Liquid crystal display device and driving method thereof - Google Patents
Liquid crystal display device and driving method thereof Download PDFInfo
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Abstract
To provide a liquid crystal display device displaying a moving image whose image quality is enhanced.The liquid crystal display device 30 comprises a frame memory 1, a correction data generating circuit 2, a source driver 3, a gate driver 4 and a display panel 5. The correction data generating circuit 2 comprises a subtracter 11, an [alpha] multiplier 12 and an adder 13. The subtracter 11 performs subtraction processing after receiving previous frame image data L0 output from the frame memory 1 and current frame image data L1. The multiplier 13 performs multiplication processing by an multiplication factor [alpha] after receiving a signal output from the subtracter 11. The adder 13 performs addition processing after receiving the previous image data L0 output from the frame memory 1 and the result of [alpha] multiplication output from the [alpha] multiplier 12 and outputs an over-driven correction image data L<SB>LAO</SB>to the source driver 3.
Description
Technical field
The present invention relates to liquid crystal indicator, particularly about improving the technology of dynamic image image quality.
Background technology
In recent years, liquid crystal indicator to maximize, height becomes more meticulous development, the application of PC, portable terminal, TV, vehicle-mounted etc. display is also in expansion.Along with the multifunction of PC and TV etc., the shown image of liquid crystal indicator is from the still image to the dynamic image, and scope also becomes greatly, and this just requires liquid crystal indicator to have the more Presentation Function of high image quality.In the liquid crystal indicator,, be difficult to realize that the dynamic image with enough Presentation Functions shows because the liquid crystal material reaction velocity is slow.Therefore, used the overdrive technique that improves the liquid crystal cells reaction velocity, improves the demonstration of display panels dynamic image in the liquid crystal indicator mostly.This overdrive technique has used LUT (Look-up table) (as referring to Patent Document 1 and 2), and LUT is the form that is used to set by the view data of preceding 1 frame and present correction data that view data determined.
But, in the overdrive technique of LUT mode, when redesigning display panels, all need to measure best correction data at every turn, in storeies such as ROM, write and the grey of view data correction data that match, that quantity is huge.In addition, in the LUT mode, output terminal subnumber and power consumption have also increased, particularly limit number of terminals and require the low portable terminal of power consumption, when using the overdrive technique of LUT mode in the mobile phone, because the increase of number of terminals and power consumption is relatively more difficult in the application.Except mobile phone, as portable digital audio player, portable game machine, the dynamic image of concert show and the dynamic image demonstration of simulation in same problem is also arranged.
[patent documentation 1]
The spy open the 2004-109796 communique (the 8th page, Fig. 2)
[patent documentation 2]
No. 2005/0253785 instructions of U.S. Patent Application Publication
Summary of the invention
The present invention relates to show the liquid crystal indicator and the driving method thereof of the dynamic image picture after image quality improves.
In order to achieve the above object, the liquid crystal indicator of a mode of the present invention is characterised in that to have: storer, received image signal, storing image data; Revise the data generative circuit, the laggard professional etiquette of subtraction result that comprises the substracting unit that carries out subtraction process with the view data of present frame with after the view data input of preceding 1 frame of above-mentioned storer output, the above-mentioned substracting unit of input surely doubly multiplication process multiplier, the above-mentioned multiplier of input multiplication result and from the view data of the view data of preceding 1 frame of above-mentioned storer output or present frame and carry out the adder of addition process, the processing of overdriving during for dynamic image of above-mentioned view data.
In order to achieve the above object, the driving method of the liquid crystal indicator of a mode of the present invention is characterised in that, comprising: with the step of image data storage in frame memory; From the dynamic image data of present frame, deduct the step of the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory; Dynamic image data after using the 1st slope value to subtraction process carries out the step of multiplication process; After dynamic image data after the multiplication process and the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory carried out addition process, as the step of the correction dynamic image data after overdriving; Utilize above-mentioned correction dynamic image data to show the step of dynamic image data; Judge that dynamic images displayed is best image or the step that needs the image of improvement; When above-mentioned dynamic images displayed is judged as the image that need to improve, carry out subtraction process, multiplication process and addition process, repeat this processings becomes the image of the best until above-mentioned dynamic image step based on the 2nd slope value that is different from above-mentioned the 1st slope value.
According to the present invention, can provide the liquid crystal indicator and the driving method thereof that show the dynamic image after image quality improves.
Description of drawings
The schematic block diagram of the liquid crystal indicator of [Fig. 1] expression embodiment of the invention 1.
The interframe difference signal of [Fig. 2] expression embodiment of the invention 1 and the figure of the signal relation of overdriving.
[Fig. 3] illustrates the figure of the inter frame image level of the embodiment of the invention 1.
The schematic block diagram of the liquid crystal indicator of [Fig. 4] expression embodiment of the invention 2.
The process flow diagram of the liquid crystal indicator action of [Fig. 5] expression embodiment of the invention 2.
The schematic block diagram of the liquid crystal indicator of [Fig. 6] expression embodiment of the invention 3.
[Fig. 7] illustrates that the edge of the embodiment of the invention 3 emphasizes the figure that handles.
The figure that the coefficient relation is emphasized at the translational speed of [Fig. 8] expression embodiment of the invention 3 and edge.
The process flow diagram of the liquid crystal indicator action of [Fig. 9] expression embodiment of the invention 3.
The liquid crystal of [Figure 10] expression embodiment of the invention 4 schematic block diagram of source electrode driver.
The liquid crystal of [Figure 11] expression embodiment of the invention 5 schematic block diagram of source electrode driver.
The liquid crystal of [Figure 12] expression embodiment of the invention 6 schematic block diagram of source electrode driver.
The liquid crystal of [Figure 13] expression embodiment of the invention 7 schematic block diagram of source electrode driver.
The figure in the still image that shows in the display panel of [Figure 14] expression embodiment of the invention 8 and the zone of dynamic image.
The liquid crystal of [Figure 15] expression embodiment of the invention 8 schematic block diagram of source electrode driver.
The process flow diagram of the liquid crystal indicator action of [Figure 16] expression embodiment of the invention 8.
The schematic block diagram of the liquid crystal indicator of [Figure 17] expression embodiment of the invention 9.
Symbol description
1 frame memory
The 1a storer
2,2a, 2b, 2c, 2d revise the data generative circuit
3,3a, 3b, 3c, 3d, 3e source electrode driver
4 gate drivers
5 display panels
6 registers
7 input circuits/control circuit
8 output circuits
11,11a, 11m, 22 subtracters
12,12a, 12m α multiplier
13,13a, 13m, 24 totalizers
14 β multipliers
20 edge accentuator circuits
21 edge sense circuits
23 γ multipliers
30,30a, 30b, 30c liquid crystal indicator
The view data of preceding 1 frame of L0
The view data of L1 present frame
Lc emphasizes view data in the edge
L
LAOThe correction image data
S
DGADynamic image regional address specification signal
S
DOSynchronizing signal
S
GSPicture signal
S
INInput signal
S
REThe register output signal
S
SEL, S
SELA, S
SELBSelect signal
S
SGControl signal
SW1a, SW1m, SW2a, SW2m, SW3a, SW3m commutation circuit
Embodiment
Embodiments of the invention are described with reference to the accompanying drawings.
[embodiment 1]
At first, with reference to the liquid crystal indicator of the description of drawings embodiment of the invention 1.Fig. 1 is the schematic block diagram of expression liquid crystal indicator structure.In the present embodiment, liquid crystal indicator does not use LUT (Look-up table), is provided with the correction data generative circuit of revising dynamic image.
As shown in Figure 1, be provided with frame memory 1 in the liquid crystal indicator 30, revise data generative circuit 2, source electrode driver 3, gate drivers 4 and display panel (LCD LiquidCrystal Display) 5, be used for mobile phone.
Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Revise data generative circuit 2 and be arranged between frame memory 1 and the source electrode driver 3, the input dynamic image data carries out calculation process, with the correction image data L after overdriving
LAOTo source electrode driver 3 outputs.Picture signal S
GSDuring for static image data, revise data generative circuit 2 and directly static image data is exported to source electrode driver 3.
Subtracter (substracting unit) 11 is arranged between frame memory 1 and the α multiplier (multiplier) 12, the view data L0 of preceding 1 frame that input is exported from frame memory 1 and the view data L1 of present frame, carry out subtraction process, its result is exported to α multiplier 12.
α multiplier (multiplier) 12 is arranged between subtracter 11 and the totalizer (adder) 13, and the signal of input output from subtracter 11 carries out α calculation process doubly, and its result is exported to totalizer 13.About the α multiplication process, will be described in detail in the back.
Totalizer (adder) 13 is arranged between frame memory 1 and α multiplier 12 and the source electrode driver 3, the α multiplication result of the view data L0 of preceding 1 frame that input is exported from frame memory 1 and output from α multiplier 12, carry out addition process, with its result as correction image data L
LAOTo source electrode driver 3 outputs.And, correction image data L
LAOMaximal value, when view data is nbit, be no more than 2
n-1 gray scale when for example being 8bit, is no more than 255 gray scales.
Gate drivers 4, input and picture signal S
GSSynchronous synchronizing signal S
DO, the sweep trace that constitutes to the Mch of display panel 5 bar number is provided for the voltage of display video.Each sweep trace is connected with the grid of TFT in being arranged on display panel 5.
Below, the relation of interframe difference signal and the signal of overdriving is described with reference to Fig. 2 and Fig. 3.Fig. 2 is the figure of the relation of the expression interframe difference signal and the signal of overdriving, Fig. 3 is the figure of explanation inter frame image level, Fig. 3 (a) is explanation from the figure of low gray scale interframe image level when the high grey scale change, and Fig. 3 (b) is explanation from the figure of high gray scale interframe image level when the low grey scale change.
As (L1-L0) of interframe difference signal with as (the L of the signal of overdriving
LAO-L0) relation as shown in Figure 2, almost be that straight line is approximate.Here, the slope of straight line is α, and the view data of preceding 1 frame is L0, and the view data of present frame is L1, and the correction image data are L
LAOThe time, be expressed as:
L
LAO=α (L1-L0)+L0....................................... formula (1)
That is, in subtracter 11, carry out the subtraction process of (L1-L0) respectively, in α multiplier 12, carry out the α multiplication process of α (L1-L0), in totalizer 13, carry out the addition process of α (L1-L0)+L0, generate the correction image data L after overdriving thus
LAO
Here, in the distributed data shown in Figure 2, the value of slope α is 1.4473, square r of correlation coefficient r
2Be 0.9948, stronger positive correlation is arranged.And, the liquid crystal material that display panel uses not simultaneously, square r of slope α and correlation coefficient r
2Also different with above-mentioned value, but very strong mutual relationship is arranged.That is, other liquid crystal materials also can be suitable for formula (1).
Shown in Fig. 3 (a), image level from low gray scale when the high grey scale change, correction image data L
LAOOn the view data L1 of present frame, add modified value.Here, the correction image data L after overdriving
LAOImage intensity bigger than the view data L1 of present frame, show reaction velocity so can accelerate the dynamic image of liquid crystal cells.
In addition, shown in Fig. 3 (b), image level from high gray scale when the low grey scale change, correction image data L
LAOOn the view data L1 of present frame, deduct modified value.Here, the correction image data L after overdriving
LAOImage intensity littler than the view data L1 of present frame, so can eliminate dynamic image picture preceding 1 frame, that image intensity is big rapidly.Slope α does not preferably use fixed value, uses the slope α that changes at any time.
As above-mentioned, in the liquid crystal indicator of present embodiment, be provided with frame memory 1, revise data generative circuit 2, source electrode driver 3, gate drivers 4 and display panel 5.Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Revise data generative circuit 2, with the dynamic image data processing of overdriving, as picture signal S
GSDuring for static image data, directly static image data is exported to source electrode driver 3.The view data L0 of subtracter 11 inputs preceding 1 frame of output from frame memory 1 and the view data L1 of present frame carry out subtraction process.The signal of α multiplier 12 input outputs from subtracter 11 carries out α calculation process doubly.The view data L0 of totalizer 13 inputs preceding 1 frame of output from frame memory 1 and the α multiplication result of output from α multiplier 12 carry out addition process, with the correction image data L after overdriving
LAOTo source electrode driver 3 outputs.
Therefore, can not use LUT, in display panels, show the fast dynamic image of reaction velocity.In addition, when designing display panels, in storeies such as ROM, do not write and the grey of view data correction data that match, that quantity is huge after not needing to measure best correction data at every turn.And, do not need to be used for the lead-out terminal corresponding, increase that can the control output end subnumber with LUT.In addition, compare with the LUT mode, owing to can simplify circuit structure, so can realize low power consumption.Therefore, can be applicable to as the restriction number of terminals and require the liquid crystal indicator of mobile phone etc. of the portable terminal of low power consumption.
[embodiment 2]
The liquid crystal indicator and the driving method thereof of the embodiment of the invention 2 are described with reference to the accompanying drawings.Fig. 4 is the schematic block diagram of expression liquid crystal indicator.In the present embodiment, be provided with the register of storage slope α.
Below, the structure division identical with embodiment 1 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in Figure 4, be provided with frame memory 1 among the liquid crystal indicator 30a, revise data generative circuit 2, source electrode driver 3, gate drivers 4, display panel 5 and register 6, be used for mobile phone.
Register (slope memory storage) 6, input has the input signal S of the slope α information of input outside liquid crystal indicator 30a
IN, and store this information.Then, the register output signal S that contains slope α information to 12 outputs of α multiplier
REα multiplier 12 when the slope α of register 6 inputs is passed through in input from the outside, uses this slope α to carry out the α multiplication process.By using, concerning the people who sees video, can appropriately set best dynamic image from the slope α of outside input.The appropriate example of setting, as changing along with environment temperature and the variation of the correction corresponding, that cause along with the variation of frequency of operation of the correction of the correspondence of the variation of the liquid crystal characteristic that the time variation causes, the gray level relevant corresponding etc. with the ダ ィ ミ Na ミ ッ Network gamma-corrected that is used to reduce power consumption backlight, but should not be defined in above-mentioned reason, the variation that can cause with common various reasons is corresponding.
The action of liquid crystal indicator is described below with reference to Fig. 5.Fig. 5 is the process flow diagram of expression liquid crystal indicator action.
As shown in Figure 5, at first to frame memory 1 received image signal S
GS, storing image data (step S1).
Then, during dynamic image data, will be input to the subtracter 11 of revising data generative circuit 2, carry out subtraction process from the view data L0 of preceding 1 frame of frame memory 1 output and the view data of present frame.View data after the subtraction process in the α multiplier 12 of revising data generative circuit 2, for example uses the slope α 1 of setting to carry out the α multiplication process.The view data L0 of view data after the α multiplication process and preceding 1 frame is input in the totalizer 13 of revising data generative circuit 2 carries out addition process (step S2).
Then, with the correction image data L after the addition process, after overdriving
LAOBe input in the source electrode driver 3.To be input to display panel 5, display image (step S3) from the video data line information of the Nch bar number of source electrode driver 3 output with from the sweep trace information of gate driver 4 outputs.
Judge that then dynamic image is best image or the image that needs improvement for the people who sees image.For example, as determinating reference, judge whether move clear (the step S4) of dynamic image.
When dynamic image is judged as best image, directly carries out image and show (step S5).Moving of dynamic image for example is not clearly, is judged as in the time of need improving, to α multiplier 12 inputs of revising data generative circuit 2 be different from by register 6 from the regulation slope α 1 of outside input, the slope α 2 bigger for example than the value of slope α 1, carry out α multiplication process (step S6).Carry out image correction (step S2) and image demonstration (step S3) based on the view data after the α multiplication process then.Repeat this step, till to be judged to be for the people who sees image dynamic image similarly be best image.
As above-mentioned, in the liquid crystal indicator and driving method thereof of present embodiment, be provided with frame memory 1, revise data generative circuit 2, source electrode driver 3, gate drivers 4, display panel 5 and register.Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Revise data generative circuit 2, to the dynamic image data processing of overdriving, picture signal S
GSDuring for static image data, directly static image data is exported to source electrode driver 3.Subtracter 11, input is carried out subtraction process from the view data L0 of preceding 1 frame of frame memory 1 output and the view data L1 of present frame.α multiplier 12, input carry out α calculation process doubly from the signal of subtracter 11 outputs.Totalizer 13, input is carried out addition process, with the correction image data L after overdriving from the view data L0 of preceding 1 frame of frame memory 1 output and the α multiplication result of exporting from α multiplier 12
LAOTo source electrode driver 3 outputs.Register 6, input has the input signal S of the slope α information of input outside liquid crystal indicator 30a
INThis information is stored in the back, and imports the register output signal S with slope α information to α multiplier 12
REAfter being input to α multiplier 12 by register 6 from the slope α of outside input, use this slope α to carry out the α multiplication process.
Therefore, can not use LUT in display panels, to show the dynamic image that reaction velocity is fast.In addition, when designing display panels, in storeies such as ROM, do not write and the grey of view data correction data that match, that quantity is huge after not needing to measure best correction data at every turn.And, do not need to be used for the lead-out terminal corresponding, increase that can the control output end subnumber with LUT.In addition, compare with the LUT mode, owing to can simplify circuit structure, so can realize low power consumption.And can suitably set the value of slope α when liquid crystal display picture is seen in the outside, making dynamic image is best moving, so can shorten the minute of revising data, need not design according to liquid crystal material or liquid crystal panel again.Therefore, can be applicable to as the restriction number of terminals and require the liquid crystal indicator of mobile phone etc. of the portable terminal of low power consumption.
The dynamic image judgement is undertaken by the people in the present embodiment, also can use the mensuration machine to judge.In addition, can replace register 6, as the information of using non-volatile memory to store slope α with storer.
[embodiment 3]
The liquid crystal indicator of the embodiment of the invention 3 is described with reference to the accompanying drawings.Fig. 6 is the schematic block diagram of expression liquid crystal indicator.Fig. 7 emphasizes the figure that handles for the edge is described, Fig. 8 emphasizes the graph of a relation of coefficient for expression translational speed and edge.In the present embodiment, during dynamic image, carry out implementing to overdrive processing after the edge is emphasized to handle.
Below, the structure division identical with embodiment 1 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in Figure 6, be provided with frame memory 1 among the liquid crystal indicator 30b, revise data generative circuit 2, source electrode driver 3, gate drivers 4, display panel 5 and edge accentuator circuit 20, be used for mobile phone.
Be provided with edge sense circuit 21, subtracter 22, γ multiplier 23 and totalizer 24 in the edge accentuator circuit 20.Edge accentuator circuit 20, received image signal S
GS, carry out the edge behind the dynamic image zone of extraction image and emphasize to handle.
Coefficient gamma is emphasized at the edge that uses in order to carry out the edge to emphasize to handle, and as shown in Figure 8, is that 0 (still image) is the smaller value A to translational speed from translational speed, sets γ=1.Translational speed is that value A and translational speed are between the higher value B, sets the edge and emphasizes that the coefficient gamma straight line increases.In the zone of translational speed greater than value B, the edge emphasizes that coefficient gamma is set at certain value.The edge emphasizes that coefficient gamma is for example by the decisions such as gradation data of edge sense circuit 21 employed wave filters and image.
Subtracter (substracting unit) 22, input is carried out subtraction process from the view data L0 of preceding 1 frame of frame memory 1 output and the view data L1 of present frame, and its result is exported to γ multiplier 23.
γ multiplier (multiplier) 23 is arranged between subtracter 22 and the totalizer 24, and input is carried out γ calculation process doubly from the signal of subtracter 23 outputs based on the signal from 23 outputs of γ multiplier, and its result is exported to totalizer 24.To be described in detail in the back about the γ multiplication process.
Totalizer 24 (adder) is arranged between γ multiplier 23 and the frame memory 1, input is from the view data L0 of preceding 1 frame of frame memory 1 output and the γ multiplication result of exporting from γ multiplier 23, carry out addition process, its result is emphasized that as the edge view data Lc is to frame memory 1 and subtracter 11 outputs.
Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Subtracter (substracting unit) 11 is arranged between frame memory 1 and the α multiplier (multiplier) 12, input is emphasized view data Lc from the view data L0 of preceding 1 frame of frame memory 1 output with from the edge of totalizer 24 outputs, carry out subtraction process, its result is exported to α multiplier 12.The action of α multiplier 12 and totalizer 13 is the same with embodiment 1, so omit explanation.
Here, the edge emphasizes that coefficient is that the slope of γ, straight line is that the view data of α, preceding 1 frame is that the view data of L0, present frame is that L1, correction image data are L
LAOThe time, the edge emphasizes that view data Lc is expressed as:
Lc=γ (L1-L0)+L0.................................................. formula (2)
Promptly, in subtracter 22, carry out the subtraction process of (L1-L0) respectively, in γ multiplier 23, carry out the γ multiplication process of γ (L1-L0), in totalizer 24, carry out the addition process of γ (L1-L0)+L0, thus, view data L is emphasized at the edge that generates after the edge is emphasized.
Correction image data L
LAOBe expressed as:
L
LAO=α (Lc-L0)+L0................................................ formula (3)
That is, in subtracter 11, carry out the subtraction process of (Lc-L0) respectively, in α multiplier 12, carry out the α multiplication process of α (Lc-L0), in totalizer 13, carry out the addition process of α (Lc-L0)+L0, thus, generate the correction image data L after overdriving
LAO
Here, in edge sense circuit 21, calculate the edge and emphasize coefficient gamma, also can import the edge of emphasizing that coefficient gamma or input are stored in the register etc. in advance in the edge from the outside and emphasize coefficient gamma.
The action of liquid crystal indicator is described below with reference to Fig. 9.Fig. 9 is the process flow diagram of expression liquid crystal indicator action.
As shown in Figure 9, at first to edge accentuator circuit 20 received image signal S
GS(step S21).Whether whether dynamic image zone and still image zone are then arranged in the process decision chart picture, judging needs the edge to emphasize to handle (step S22).For example, when still images etc. do not need the edge to emphasize to handle, the step (step S24) of the image correction that advancing to overdrives handles.The dynamic image zone is arranged, when needing the edge to emphasize to handle,, calculate best edge by edge accentuator circuit 20 and emphasize coefficient gamma (step S23) according to the translational speed of dynamic image picture.
Then, emphasize coefficient gamma, be created on the edge that has carried out in the edge accentuator circuit 20 after the edge is emphasized to handle and emphasize view data Lc according to the edge that calculates, with these data to frame memory 1 and totalizer 11 outputs (step S24).
Emphasize view data Lc to subtracter 11 inputs of revising data generative circuit 2 from the view data L0 and the edge of preceding 1 frame of frame memory 1 output then, carry out subtraction process.View data after the subtraction process in the α multiplier 12 of revising data generative circuit 2, for example uses the slope α 1 of setting to carry out the α multiplication process.The view data L0 of view data after the α multiplication process and preceding 1 frame is input to the totalizer 13 of revising data generative circuit 2, carries out addition process (step S25).
Then with the correction image data L after the addition process, after overdriving
LAOBe input to source electrode driver 3.To be input to display panel 5, display image (step S26) from the video data line information of the Nch bar number of source electrode driver 3 output with from the sweep trace information of gate driver 4 outputs.
Judge that then dynamic image similarly is the image that best image still need improve for the people who sees image.For example, as determinating reference, judge whether moving of dynamic image be clear, whether the image edge dazzling (step S27).
When dynamic image is judged as best image, directly carries out image and show (step S29).Moving of dynamic image for example be not clearly, be judged as in the time of need improving, to α multiplier 12 inputs of revising data generative circuit 2 be different from slope α 1, the slope α 2 bigger for example than the value of slope α 1, carry out α multiplication process (step S28).Carry out image correction (step S25) processing afterwards based on the view data after the α multiplication process then.Repeat this step, till to be judged to be for the people who sees image dynamic image similarly be best image.
Process decision chart as edge thorn at the moment, set and use be different from the edge that calculates emphasize coefficient gamma 1, for example emphasize that than the edge the little edge of value of coefficient gamma 1 emphasizes coefficient gamma 2, carry out the edge and emphasize to handle (step S24).Carry out the edge then and emphasize to handle (step S24) later processing.Repeat this step, till to be judged to be for the people who sees image dynamic image similarly be best image.
As above-mentioned, in the liquid crystal indicator and driving method thereof of present embodiment, be provided with frame memory 1, revise data generative circuit 2, source electrode driver 3, gate drivers 4, display panel 5 and edge accentuator circuit 20.Be provided with edge sense circuit 21, subtracter 22, γ multiplier 23 and totalizer 24 in the edge accentuator circuit 20.Edge accentuator circuit 20 carries out the edge and emphasizes to handle when the dynamic image zone is arranged in image, the image information after the edge is emphasized to handle is to frame memory 1 and revise 2 outputs of data generative circuit.Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Revise data generative circuit 2, to the dynamic image data processing of overdriving, picture signal S
GSDuring for static image data, directly static image data is exported to source electrode driver 3.Subtracter 11, input is emphasized view data Lc from the view data L0 and the edge of preceding 1 frame of frame memory 1 output, carries out subtraction process.α multiplier 12, input carry out α calculation process doubly from the signal of subtracter 11 outputs.Totalizer 13, input is carried out addition process, with the correction image data L after overdriving from the view data L0 of preceding 1 frame of frame memory 1 output and the α multiplication result of exporting from α multiplier 12
LAOTo source electrode driver 3 outputs.
Therefore,, can also only emphasize the edge of dynamic image except effect similarly to Example 1, so, compare with embodiment 1, distinct, fuzzy few dynamic image can be provided.
And in the present embodiment, the value of translational speed is during at (A) with (B), and the edge emphasizes that coefficient (γ) is set at straight line and increases, also can appropriate change, and be set to wait and replace straight line to increase as 2 curve increases.
[embodiment 4]
The liquid crystal indicator of the embodiment of the invention 4 is described with reference to the accompanying drawings.Figure 10 is the block diagram of expression liquid crystal with source electrode driver.In the present embodiment, be provided with in the source electrode driver and revise the data generative circuit.
Below, the structure division identical with embodiment 1 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in figure 10, be provided with frame memory 1 among the source electrode driver 3a, revise data generative circuit 2, input circuit/control circuit 7 and output circuit 8, be used for mobile phone.Here, frame memory 1 is as showing that in order to reduce power consumption the display-memory of 1 picture part and the frame memory corresponding with overdrive technique play a role.
Be provided with register 6 in input circuit/control circuit 7.Input circuit/control circuit 7, received image signal S
GSWith control signal picture signal S
SG, with image data information to frame memory 1 output, with the view data L1 of present frame to subtracter 11 outputs of revising data generative circuit 2.
As above-mentioned, in the liquid crystal indicator and driving method thereof of present embodiment, frame memory 1, correction data generative circuit 2, input circuit/control circuit 7 and output circuit 8 are arranged among the source electrode driver 3a.Revise in the data generative circuit 2 and be provided with subtracter 11, α multiplier 12 and totalizer 13.Revise data generative circuit 2, to the dynamic image data processing of overdriving, picture signal S
GSDuring for static image data, directly static image data is exported to output circuit 8.Subtracter 11, input is carried out subtraction process from the view data L0 of preceding 1 frame of frame memory 1 output and the view data L1 of present frame.α multiplier 12, input carry out α calculation process doubly from the signal of subtracter 11 outputs.Totalizer 13, input is carried out addition process, with the correction image data L after overdriving from the view data L0 of preceding 1 frame of frame memory 1 output and the α multiplication result of exporting from α multiplier 12
LAOTo output circuit 8 outputs.Register 6 is arranged in input circuit/control circuit 7, and input has from the input signal S of the slope α information of outside input
INThis information is stored in the back, and imports the register output signal S with slope α information to α multiplier 12
REAfter being input to α multiplier 12 by register 6 from the slope α of outside input, use this slope α to carry out the α multiplication process.
Therefore, can not use LUT in display panels, to show the dynamic image that reaction velocity is fast.In addition, when designing display panels, in storeies such as ROM, do not write and the grey of view data correction data that match, that quantity is huge after not needing to measure best correction data at every turn.And, do not need to be used for the lead-out terminal corresponding, increase that can the control output end subnumber with LUT.In addition, compare with the LUT mode, owing to can simplify circuit structure, so can realize low power consumption.And can suitably set slope α when liquid crystal display picture is seen in the outside, making dynamic image is best moving, so can shorten the minute of revising data, need not design according to liquid crystal material or liquid crystal panel again.In addition, revise data generative circuit 2 and register 6 and be arranged among the source electrode driver 3a,, can realize the lightness and the miniaturization of liquid crystal indicator so can reduce the number of components of liquid crystal indicator.
[embodiment 5]
The liquid crystal indicator of the embodiment of the invention 5 is described with reference to the accompanying drawings.Figure 11 is the block diagram of expression liquid crystal with source electrode driver.In the present embodiment, a plurality of totalizers, α multiplier and subtracter have been set respectively in the correction data generative circuit of source electrode driver.
Below, the structure division identical with embodiment 4 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in figure 11, be provided with frame memory 1 among the source electrode driver 3b, revise data generative circuit 2a, input circuit/control circuit 7 and output circuit 8, be used for mobile phone.Here, display panels is for example during the picture of QVGA size, it is pixel (pixel) number of 240 (RGB) * 320, the output terminal subnumber of source electrode driver 3b is 240 (RGB) * 3=720, owing to do not use the LUT mode, so increase that can the control output end subnumber.In addition, when view data was 6bit, the capacity of frame memory 1 was 240 * 3 * 320 * 6bit.
Revise among the data generative circuit 2a and be provided with N=720 subtracter, α multiplier and totalizer respectively, carry out N=720 the processing of overdriving respectively.
As above-mentioned, in the liquid crystal indicator of present embodiment, frame memory 1, correction data generative circuit 2, input circuit/control circuit 7 and output circuit 8 are arranged among the source electrode driver 3b.Revise among the data generative circuit 2a and be provided with N subtracter, α multiplier and totalizer respectively.Revise data generative circuit 2, to the dynamic image data processing of overdriving, picture signal S
GSDuring for static image data, directly static image data is exported to output circuit 8.Register 6 is arranged in input circuit/control circuit 7, and input has from the input signal S of the slope α information of outside input
INThis information is stored in the back, and exports the register output signal S with slope α information to N α multiplier
REAfter being input to N multiplier by register 6 from the slope α of outside input, use this slope α to carry out the α multiplication process.Therefore, has similarly to Example 4 effect.
[embodiment 6]
The liquid crystal indicator of the embodiment of the invention 6 is described with reference to the accompanying drawings.Figure 12 is the block diagram of expression liquid crystal with source electrode driver.In the present embodiment, set a plurality of totalizers, α multiplier and subtracter respectively in the correction data generative circuit of source electrode driver, its quantity is lacked than embodiment 5.
Below, the structure division identical with embodiment 4 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in figure 12, be provided with frame memory 1 among the source electrode driver 3c, revise data generative circuit 2b, input circuit/control circuit 7, commutation circuit SW1a ..., commutation circuit SW1m, commutation circuit SW2a ... commutation circuit SW2m and output circuit 8 are used for mobile phone.
Here, commutation circuit SW1a, ..., the quantity of commutation circuit SW1m is m and has same structure, commutation circuit SW2a, ..., the quantity of commutation circuit SW2m is m and has same structure, constitute the subtracter 11a that revises data generative circuit 2b, ..., the quantity of subtracter 11m is m and has same structure, constitute the α multiplier 12a that revises data generative circuit 2b, ..., the quantity of α multiplier 12m is m and has same structure, constitutes the totalizer 13a that revises data generative circuit 2b, ..., the quantity of totalizer 13m is m and has same structure.
The output terminal subnumber of source electrode driver 3c, for example during N=720, here, the quantity of commutation circuit SW1, commutation circuit SW2, subtracter 11, α multiplier 12 and totalizer 13, be set at m=72 (output terminal subnumber N=720 1/10) respectively, commutation circuit SW1 and commutation circuit SW2 play a role as the view data selecting arrangement.
Input circuit/control circuit 7, received image signal S
GSWith control signal S
SG, with image data information to frame memory 1 output, with the view data L1 of present frame respectively to the subtracter 11a that revises data generative circuit 2a ..., subtracter 11m output.Then, control circuit output control commutation circuit SW1a ..., the selection signal S of commutation circuit SW1m action
SELAWith control commutation circuit SW2a ..., the selection signal S of commutation circuit SW2m action
SELB
Commutation circuit SW1a is made of the SP10T switch, is arranged between frame memory 1 and the subtracter 11a, and the view data L0 of input 1 frame before 10 of frame memory 1 output is according to selecting signal S
SELASelect the view data L0 of any one preceding 1 frame wherein, to subtracter 11a and totalizer 13a output.
Subtracter 11a is arranged between commutation circuit SW1a and frame memory 1 and the α multiplier 12a, the view data L0 of preceding 1 frame of output and the view data L1 of present frame are selected in input from commutation circuit SW1a, carry out subtraction process, its result is exported to α multiplier 12a.
Commutation circuit SW2a is made of the SP10T switch, is arranged between totalizer 13a and the output circuit 8, and input is from the correction image data L of totalizer 13a output
LAO, according to selecting signal S
SELBSelect to export any one in 10 input terminals that are arranged in the output circuit 8.Here, be provided with 10m (10 * 72=720) input terminal in the output circuit 8 at least.
Commutation circuit SW1m is made of the SP10T switch, is arranged between frame memory 1 and the subtracter 11m, and the view data L0 of input 1 frame before 10 of frame memory 1 output is according to selecting signal S
SELASelect the view data L0 of any one preceding 1 frame wherein, to subtracter 11m and totalizer 13m output.
Commutation circuit SW2m is made of the SP10T switch, is arranged between totalizer 13m and the output circuit 8, and input is from the correction image data L of totalizer 13m output
LAO, according to selecting signal S
SELBSelect to export any one in 10 input terminals that are arranged in the output circuit 8.
As above-mentioned, in the liquid crystal indicator of present embodiment, frame memory 1, revise data generative circuit 2b, input circuit/control circuit 7, commutation circuit SW1a ..., commutation circuit SW1m, commutation circuit SW2a ... commutation circuit SW2m and output circuit 8 are arranged among the source electrode driver 3c.M commutation circuit SW1, the view data L0 of input 1 frame before 10 of frame memory 1 output is according to selecting signal S
SELASelect the wherein view data L0 of any one preceding 1 frame, respectively to subtracter corresponding 11 and totalizer 13 outputs with commutation circuit SW1.Revise among the data generative circuit 2a and be provided with N subtracter, α multiplier and totalizer respectively.Revise data generative circuit 2, to the dynamic image data processing of overdriving, picture signal S
GSDuring for static image data, directly static image data is exported to output circuit 8.Register 6 is arranged in input circuit/control circuit 7, and input has from the input signal S of the slope α information of outside input
INThis information is stored in the back, and exports the register output signal S with slope α information to N α multiplier
REAfter being input to N multiplier by register 6 from the slope α of outside input, use this slope α to carry out the α multiplication process.
M commutation circuit SW2, input is exported from m totalizer 13, the correction image data L corresponding respectively with commutation circuit SW2
LAO, according to selecting signal S
SELBSelect to export any one in 10 input terminals that are arranged in the output circuit 8.
Therefore, except effect similarly to Example 4, can also reduce the quantity that constitutes subtracter, α multiplier and the totalizer of revising data generative circuit 2b, so can simplify the circuit structure of source electrode driver 3c.
In the present embodiment, output terminal subnumber 720 with respect to source electrode driver 3c, the quantity of commutation circuit SW1, commutation circuit SW2, subtracter 11, α multiplier 12 and totalizer 13 is set at 72 respectively (output terminal subnumber 1/10), also can be set at other ratios, for example be set at 1/5 etc. of output terminal subnumber.In addition, set m commutation circuit SW1 and m commutation circuit respectively as SP10T, also can appropriate change commutation circuit SW1 and the structure of commutation circuit.
[embodiment 7]
The liquid crystal indicator of the embodiment of the invention 7 is described with reference to the accompanying drawings.Figure 13 is the block diagram of expression liquid crystal with source electrode driver.In the present embodiment, be provided with a plurality of 2 kinds of α multipliers and positive and negative decision circuit respectively in the correction data generative circuit of source electrode driver.
Below, the structure division identical with embodiment 4 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in figure 13, be provided with frame memory 1 among the source electrode driver 3d, revise data generative circuit 2c, input circuit/control circuit 7 and output circuit 8, be used for mobile phone.
Input circuit/control circuit 7, received image signal S
GSWith control signal S
SG, with image data information to frame memory 1 output, with the view data L1 of present frame to revising data generative circuit 2c output.
Revising data generative circuit 2c is arranged between frame memory 1 and the output circuit 8.Revise among the data generative circuit 2c and be provided with N subtracter, positive and negative decision circuit, α 1 multiplier, α 2 multipliers and totalizer respectively.α 1 multiplier carries out the α multiplication with slope α 1 and calculates, and the α multiplier carries out the α multiplication with slope α 2 and calculates.
Here, the relation of the view data L1 of the view data L0 of preceding 1 frame and present frame
(L1-L0)＞0....................................... formula (4)
The view data in represented zone is used slope α 1 to carry out the α multiplication and is calculated,
(L1-L0)＜0....................................... formula (5)
The view data in represented zone is used slope α 2 to carry out the α multiplication and is calculated.
Here, for example (L1-L0) is positive zone and (L1-L0) in the negative zone, with (L
LAO-L0) concern difference, (L1-L0) with (L
LAO-L0) relation supposition has more weak mutual relationship.At this moment, use slope α 1 that (L1-L0) come for the approximate institute of the straight line in positive zone obtains and (L1-L0) obtain next slope α 2 processing of overdriving for the straight line in negative zone is approximate, thus can show reaction velocity soon, dynamic image clearly.
The positive and negative judgement of value (L1-L0) is undertaken by positive and negative decision circuit, selects α 1 multiplier or α 2 multipliers according to the signal of positive and negative decision circuit output.
During slope α 1, the view data after the α multiplication that the totalizer input is exported from α 1 multiplier calculates and the view data L0 of preceding 1 frame carry out addition process.During slope α 2, the view data after the α multiplication that the totalizer input is exported from α 2 multipliers calculates and the view data L0 of preceding 1 frame carry out addition process.
As above-mentioned, in the liquid crystal indicator of present embodiment, frame memory 1, correction data generative circuit 2c, input circuit/control circuit 7 and output circuit 8 are arranged among the source electrode register 3d.Revise among the data generative circuit 2c and be provided with N subtracter, positive and negative decision circuit, α 1 multiplier, α 2 multipliers and totalizer respectively.Revise data generative circuit 2c, at (L1-L0) for using slope α 1 processings of overdriving in the positive zone, (L1-L0) for negative zone in use slope α 2 processing of overdriving.
Therefore, except effect similarly to Example 4, even (L1-L0) with (L
LAO-L0) mutual relationship a little less than, (L1-L0) be positive zone and, so can show reaction velocity dynamic image soon and clearly (L1-L0) for using best slope α in the negative zone respectively.
In the present embodiment, slope α is divided into 2, but is not limited thereto, also can be divided into 3,4 or more.
[embodiment 8]
The liquid crystal indicator and the driving method thereof of the embodiment of the invention 8 are described with reference to the accompanying drawings.Figure 14 is the figure in the zone of shown still image of expression display panel and dynamic image, and Figure 15 is the block diagram of expression liquid crystal with source electrode driver.In the present embodiment, be provided with the commutation circuit of a plurality of switching still images and dynamic image.
Below, the structure division identical with embodiment 4 represent with prosign, and omit the explanation of this part, and different parts only is described.
When showing dynamic image and still image simultaneously in the display panel 5, as shown in figure 14, overdrive technique is used in dynamic image zone shown in a part of zone of display panel 5, and overdrive technique is not used in other shown still image zones, zone.
As shown in figure 15, be provided with among the source electrode driver 3e storer 1a, revise data generative circuit 2a, input circuit/control circuit 7, commutation circuit SW3a ..., commutation circuit SW3n and output circuit 8, be used for mobile phone.Here, commutation circuit SW3a ..., the quantity of commutation circuit SW3n is N and has same structure, play a role as the view data selecting arrangement.
Input circuit/control circuit 7, received image signal S
GS, control signal S
SGWith dynamic image regional address specification signal S
DGA, image data information to storer 1a output, is exported the view data L1 of present frame respectively to N subtracter revising data generative circuit 2a.Then, control circuit output control commutation circuit SW3a ..., N selection signal S of commutation circuit SW3n action
SEL, formulate signal S according to the dynamic image regional address
DGACarrying out the address of dynamic image data specifies.
Storer 1a is arranged between input circuit/control circuit 7 and N the commutation circuit SW3, with the view data L0 of preceding 1 frame of dynamic image and still image respectively to N commutation circuit SW3 output.Here, use as the frame memory of the view data that keeps preceding 1 frame in the zone of storer 1a of storage dynamic image data, and the zone of the storer 1a of storage static image data is as common display-memory use.
Commutation circuit SW3a is made of the SPDT switch, be arranged between the 1st subtracter of storer 1a and correction data generative circuit 2a, input is from the view data of the still image of storer 1a output and view data (dynamic image data) L0 of preceding 1 frame, according to selecting signal S
SELSelect any one view data wherein.
When view data is still image, directly export to output circuit 8 from the static image data of commutation circuit SW3a output.When view data is dynamic image, by dynamic image regional address specification signal S
DGACarry out the address and specify, the dynamic image data of being selected by commutation circuit SW3a carries out data correction in revising data generative circuit 2a, as correction image data L
LAOTo output circuit 8 outputs.
N commutation circuit SW3n is made of the SPDT switch, be arranged between n the subtracter of storer 1a and correction data generative circuit 2a, input is from the view data of the still image of frame memory 1 output and view data (dynamic image data) L0 of preceding 1 frame, according to selecting signal S
SELSelect any one view data wherein.
When view data is still image, directly export to output circuit 8 from the static image data of N commutation circuit SW3n output.When view data is dynamic image, by dynamic image regional address specification signal S
DGACarry out the address and specify, the dynamic image data of being selected by N commutation circuit SW3n carries out data correction in revising data generative circuit 2a, as correction image data L
LAOTo output circuit 8 outputs.
The action of liquid crystal indicator is described below with reference to Figure 16.Figure 16 is the process flow diagram of expression liquid crystal indicator action.
As shown in figure 16, at first, to storer 1a received image signal S
GS, storing image data (step S11).Then, according to selecting signal S
SEL, in commutation circuit SW3, select from the dynamic image data and the static image data (step S12) of storer 1a output.
When the view data of storer 1a output is dynamic image, by dynamic image regional address specification signal S
DGACarry out the address and specify, in revising data generative circuit 2a, carry out data correction by the dynamic image data of selecting among the commutation circuit SW3, as correction image data L
LAOTo output circuit 8 outputs (step S13).When the view data of storer 1a output was still image, the static image data of being selected by commutation circuit SW3 was directly to output circuit 8 outputs (step S14).
Then, will be from revising the correction image data L of data generative circuit 2a output
LAOBe input in the output circuit 8 with the static image data of from commutation circuit SW3, selecting to export.Demonstration is input to image (step S15) the display panels from the video data line information of output circuit output with from the sweep trace information of gate drivers output.
As above-mentioned, in the liquid crystal indicator and driving method thereof of present embodiment, storer 1a, revise data generative circuit 2a, input circuit/control circuit 7, commutation circuit SW3a ..., commutation circuit SW3n and output circuit 8 be arranged among the source electrode driver 3e.Input circuit/control circuit 7, received image signal S
GS, control signal S
SGWith dynamic image regional address specification signal S
DGA, image data information to storer 1a output, is exported the view data L1 of present frame respectively to N subtracter revising data generative circuit 2a.Register 6, input have from the input signal S of the slope α information of outside input
INThis information of back storage.Storer 1a exports the view data L0 of preceding 1 frame of dynamic image and still image respectively to N commutation circuit SW3.N commutation circuit SW3 imports respectively from the view data of the still image of storer 1a output and view data (dynamic image data) L0 of preceding 1 frame, according to selecting signal S
SELSelect wherein view data arbitrarily.When view data is still image, directly export to output circuit 8 from the static image data of N commutation circuit SW3 output.When view data is dynamic image, by dynamic image regional address specification signal S
DGACarry out the address and specify, in revising data generative circuit 2a, carry out data correction by the dynamic image data of selecting respectively among N the commutation circuit SW3, as correction image data L
LAOTo output circuit 8 outputs.
Therefore, except effect similarly to Example 4, can also in display panels, show simultaneously reaction velocity soon and clearly dynamic image and still image.
[embodiment 9]
The liquid crystal indicator of the embodiment of the invention 9 is described with reference to the accompanying drawings.Figure 17 is the schematic block diagram of expression liquid crystal indicator.In the present embodiment, changed the structure of revising the data generative circuit.
Below, the structure division identical with embodiment 1 represent with prosign, and omit the explanation of this part, and different parts only is described.
As shown in figure 17, be provided with frame memory 1 among the liquid crystal indicator 30c, revise data generative circuit 2d, source electrode driver 3, gate drivers 4 and display panel 5, be used for mobile phone.
Revise among the data generative circuit 2d and be provided with subtracter 11, totalizer 13 and β multiplier 14.Revise data generative circuit 2d and be arranged between frame memory 1 and the source electrode driver 3, the input dynamic image data carries out calculation process, with the correction image data L after overdriving
LAOTo source electrode driver 3 outputs.Picture signal S
GSDuring for static image data, revise data generative circuit 2 and directly static image data is exported to source electrode driver 3.
Subtracter (substracting unit) 11 is arranged between frame memory 1 and the β multiplier (multiplier) 14, input is from the view data L0 of preceding 1 frame of frame memory 1 output and the view data L1 of present frame, carry out subtraction process, its result is exported to β multiplier 14.
Here, as the signal of overdriving, use (L
LAO-L1) replace (L
LAO-L0), straight slope at this moment is that the view data of β, preceding 1 frame is that the view data of L0, present frame is that L1, correction image data are L
LAOThe time, be expressed as:
L
LAO-L1=β (L1-L0) ... ... ... ... ... ... ... .... formula (6)
Be expressed as after formula (4) is out of shape:
L
LAO=β (L1-L0)+L1................................................. formula (7)
That is, in subtracter 11, carry out the subtraction process of (L1-L0) respectively, in β multiplier 14, carry out the β multiplication process of β (L1-L0), in totalizer 13, carry out the addition process of β (L1-L0)+L1, thus, generate the correction image data L after overdriving
LAO
As above-mentioned, in the liquid crystal indicator of present embodiment, be provided with frame memory 1, revise data generative circuit 2d, source electrode driver 3, gate drivers 4 and display panel 5.Revise among the data generative circuit 2d and be provided with subtracter 11, totalizer 13 and β multiplier 14.Revise data generative circuit 2d, with the dynamic image data processing of overdriving, as picture signal S
GSDuring for static image data, directly static image data is exported to source electrode driver 3.The view data L0 of subtracter 11 inputs preceding 1 frame of output from frame memory 1 and the view data L1 of present frame carry out subtraction process.The signal of β multiplier 14 input outputs from subtracter 11 carries out β calculation process doubly.The view data L1 of totalizer 13 input present frames and the β multiplication result of output from β multiplier 14 carry out addition process, with the correction image data L after overdriving
LAOTo source electrode driver 3 outputs.Therefore, has similarly to Example 1 effect.
The present invention is not limited to the foregoing description, as long as in the scope that does not break away from inventive concept, can carry out various variations.
For example, among the embodiment, will use the overdrive technique of revising the data generative circuits to be used for mobile phone, also can be used for the display (display device) of PC, TV, vehicle-mounted or tester etc. as portable terminal.In addition, among the embodiment 3, implement to overdrive processing again after the edge that has carried out dynamic image is emphasized to handle, this edge is emphasized to handle and is not limited to embodiment 3, also is applicable to other embodiment.Among the embodiment 9, use slope β in β multiplier 14, the signal from subtracter 11 outputs to be carried out the β multiplication process, also can in revising the data generative circuit, a plurality of β multipliers be set, in each β multiplier, use different slope β to carry out the β multiplication process, the processing of overdriving.In addition, also can in embodiment 9, register be set, will be input to the β multiplier by the slope β information of register from the outside input.
Claims (13)
1. liquid crystal indicator is characterized in that having:
Storer, received image signal, storing image data; With
Revise the data generative circuit, have: the substracting unit that carries out subtraction process with the view data of present frame with after the view data input of preceding 1 frame of above-mentioned storer output, the laggard professional etiquette of subtraction result of importing above-mentioned substracting unit is doubly the multiplier of multiplication process surely, import the multiplication result of above-mentioned multiplier and from the view data of the view data of preceding 1 frame of above-mentioned storer output or present frame and carry out the adder of addition process, the processing of overdriving when wherein, above-mentioned view data is for dynamic image.
2. liquid crystal indicator is characterized in that having:
Storer, received image signal, storing image data; With
The slope memory storage, storage is from the slope value of outside input;
Revise the data generative circuit, have: the substracting unit that carries out subtraction process after the view data and the view data that is stored in preceding 1 frame in the above-mentioned storer of present frame are imported, import the subtraction result of above-mentioned substracting unit and use above-mentioned slope value to carry out the multiplier of multiplication process, import the multiplication result of above-mentioned multiplier and from the view data of the view data of preceding 1 frame of above-mentioned storer output or present frame and carry out the adder of addition process, wherein, the processing of overdriving during for dynamic image of above-mentioned view data is directly exported as static image data when above-mentioned view data is still image.
3. liquid crystal indicator is characterized in that having:
Frame memory, received image signal, storing image data;
The slope memory storage, storage is a plurality of slope value input, different from the outside;
Revise the data generative circuit, have: the subtracter that from the view data of present frame, deducts the view data that is stored in preceding 1 frame in the above-mentioned frame memory, according to the subtraction process result from above-mentioned different a plurality of slope value judge and select 1 decision circuit, import the subtraction result of above-mentioned subtracter and use the slope value of selecting by above-mentioned decision circuit to carry out the multiplier of multiplication process, import the multiplication result of above-mentioned multiplier and be stored in the view data of preceding 1 frame in the above-mentioned frame memory and carry out the totalizer of addition process, wherein, the processing of overdriving during for dynamic image of above-mentioned view data is directly exported as static image data when above-mentioned view data is still image.
4. according to claim 2 or 3 described liquid crystal indicators, it is characterized in that above-mentioned slope memory storage is the register of storage slope value.
5. liquid crystal indicator is characterized in that having:
The edge accentuator circuit, received image signal when the dynamic image zone is arranged in the image, partly carries out the edge to dynamic image and emphasizes to handle;
Storer, input from the carrying out of above-mentioned edge accentuator circuit output the edge of edge after emphasizing to handle emphasize view data, and storing image data; With
Revise the data generative circuit, have: view data is emphasized at above-mentioned edge and carried out the substracting unit of subtraction process after the view data input of preceding 1 frame of above-mentioned storer output, the laggard professional etiquette of subtraction result of importing above-mentioned substracting unit is doubly the multiplier of multiplication process surely, import the multiplication result of above-mentioned multiplier and emphasize view data from the view data of preceding 1 frame of above-mentioned storer output or above-mentioned edge and carry out the adder of addition process, the processing of overdriving when wherein, above-mentioned view data is for dynamic image.
6. the driving method of a liquid crystal indicator is characterized in that, comprising:
With the step of image data storage in frame memory;
From the dynamic image data of present frame, deduct the step of the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory;
Dynamic image data after using the 1st slope value to subtraction process carries out the step of multiplication process;
After dynamic image data after the multiplication process and the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory carried out addition process, as the step of the correction dynamic image data after overdriving;
Utilize above-mentioned correction dynamic image data to show the step of dynamic image data;
Judge that dynamic images displayed is best image or the step that needs the image of improvement; With
When above-mentioned dynamic images displayed is judged as the image that need to improve, carry out subtraction process, multiplication process and addition process, repeat this processings becomes the image of the best until above-mentioned dynamic image step based on the 2nd slope value that is different from above-mentioned the 1st slope value.
7. the driving method of a liquid crystal indicator is characterized in that, comprising:
In dynamic image when zone, arranged in the view data, dynamic image is partly carried out the edge emphasize the step handled;
Dynamic image data after the edge emphasized is stored in the step in the frame memory;
Deduct the step of the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory the dynamic image data after above-mentioned edge is emphasized;
Dynamic image data after using the 1st slope value to subtraction process carries out the step of multiplication process;
After dynamic image data after the multiplication process and the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory carried out addition process, as the step of the correction dynamic image data after overdriving;
Utilize above-mentioned correction dynamic image data to show the step of dynamic image data;
Judge that dynamic images displayed is best image or the step that needs the image of improvement; With
When above-mentioned dynamic images displayed is judged as the image that need to improve, carry out subtraction process, multiplication process and addition process, repeat this processings becomes the image of the best until above-mentioned dynamic image step based on the 2nd slope value that is different from above-mentioned the 1st slope value.
8. the driving method of a liquid crystal indicator comprises:
When being arranged in the view data, the dynamic image zone time use the 1st edge to emphasize that coefficient value partly carries out the edge to dynamic image and emphasizes the step handled;
Dynamic image data after the edge emphasized is stored in the step in the frame memory;
Deduct the step of the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory the dynamic image data after above-mentioned edge is emphasized;
Dynamic image data after using the 1st slope value to subtraction process carries out the step of multiplication process;
After dynamic image data after the multiplication process and the dynamic image data that is stored in preceding 1 frame in the above-mentioned frame memory carried out addition process, as the step of the correction dynamic image data after overdriving;
Utilize above-mentioned correction dynamic image data to show the step of dynamic image data;
Judge that dynamic images displayed is best image or the step that needs the image of improvement;
When above-mentioned dynamic images displayed mobile is determined when unintelligible, carries out subtraction process, multiplication process and addition process, repeats this processing becomes best image until above-mentioned dynamic image step based on the 2nd slope value that is different from above-mentioned the 1st slope value;
When the image edge of above-mentioned dynamic images displayed is judged as thorn at the moment, emphasize that based on being different from above-mentioned the 1st edge the 2nd edge of coefficient value emphasizes coefficient value, repeats the edge and emphasize to handle the step that becomes best image until above-mentioned dynamic image.
9. the driving method of a liquid crystal indicator comprises:
With the step of image data storage in storer;
To switch to the step of dynamic image or still image from the view data of above-mentioned storer output;
When above-mentioned view data is dynamic image, from the dynamic image data of present frame, deduct the dynamic image data that is stored in preceding 1 frame in the above-mentioned storer, the dynamic image data after using slope value to subtraction process carries out multiplication process, with the dynamic image data after the multiplication process with the dynamic image data of preceding 1 frame after switching carries out addition process and as the step of the correction dynamic image data after overdriving; With
Above-mentioned correction dynamic image data after the appointment of address and static image data are carried out the step that image shows.
10. liquid crystal indicator has:
Dynamic image is partly carried out the edge emphasize the edge accentuator circuit handled, have: received image signal also judges whether dynamic image zone and still image zone are arranged in the image, translational speed according to dynamic image when the dynamic image zone calculates the edge sense circuit that coefficient is emphasized at the edge, carry out the 1st substracting unit of subtraction process after the view data of input present frame and the view data of preceding 1 frame, import after the subtraction result of above-mentioned the 1st substracting unit according to emphasizing that from the edge of above-mentioned edge sense circuit output coefficient carries out the 1st multiplier of multiplication process, import the 1st adder that carries out addition process after the view data of the multiplication result of above-mentioned the 1st multiplier and preceding 1 frame;
View data is emphasized at edge after storer, input are emphasized to handle from the edge of above-mentioned edge accentuator circuit output, and storing image data; With
Revise the data generative circuit, have: import the 2nd substracting unit that above-mentioned edge is emphasized view data and carried out subtraction process after the view data of preceding 1 frame of above-mentioned storer output, the laggard professional etiquette of subtraction result of importing above-mentioned the 2nd substracting unit is doubly the 2nd multiplier of multiplication process surely, carry out the 2nd adder of addition process after importing the multiplication result of above-mentioned the 2nd multiplier and emphasizing view data from the view data of preceding 1 frame of above-mentioned storer output or above-mentioned edge, the processing of overdriving when wherein, above-mentioned view data is for dynamic image.
11. a liquid crystal indicator has:
Storer, received image signal, storing image data;
Register, storage is from the slope value of outside input;
Commutation circuit, input select to export any one from the static image data of above-mentioned storer output and the dynamic image data of preceding 1 frame; With
Revise the data generative circuit, have: the subtracter that from the dynamic image data of present frame, deducts the dynamic image data of preceding 1 frame of selecting by above-mentioned commutation circuit, use above-mentioned slope value to carry out the multiplier of multiplication process after importing the subtraction result of above-mentioned subtracter, import the dynamic image data of the multiplication result of above-mentioned multiplier and selected preceding 1 frame of above-mentioned commutation circuit and carry out the totalizer of addition process, wherein, the processing of overdriving during for dynamic image of above-mentioned view data is directly exported as static image data when above-mentioned view data is still image.
12. a liquid crystal indicator has:
Frame memory, received image signal, storing image data;
Register, storage is from the slope value of outside input;
The 1st commutation circuit is selected output any one from the view data of m preceding 1 frame of above-mentioned frame memory output, and wherein, m is the integer more than 2;
Revise the data generative circuit, have: the subtracter that from the view data of present frame, deducts the view data of preceding 1 frame of selecting by above-mentioned the 1st commutation circuit, use above-mentioned slope value to carry out the multiplier of multiplication process after importing the subtraction result of above-mentioned subtracter, import the view data of the multiplication result of above-mentioned multiplier and selected preceding 1 frame of above-mentioned the 1st commutation circuit and carry out the totalizer of addition process, wherein, the processing of overdriving during for dynamic image of above-mentioned view data is directly exported as static image data when above-mentioned view data is still image; With
The 2nd commutation circuit will select to output to m the input terminal of output circuit any one from the view data of above-mentioned correction data generative circuit output.
13. according to claim 11 or 12 described liquid crystal indicators, wherein, be provided with N above-mentioned subtracter, above-mentioned multiplier and above-mentioned totalizer respectively, wherein, N is the integer more than 2.
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