CN101488325B - Image driving method and driving circuit for display, and display apparatus - Google Patents
Image driving method and driving circuit for display, and display apparatus Download PDFInfo
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Abstract
A display image drive method comprises receiving an image frame and loading at least one part thereof. Wherein, the image frame consist of a foreside frame and a backside frame which are respectively subjected to a first brightness adjustment as a first part of a first image frame and a second image frame; a second part of the first image frame is fill with the previously received image frame and the data processed by a second brightness, and a second part of the second image frame is filled currently received image frame and the data processed by the second brightness into; and then the entire first image frame and second image frame are output for the subsequent display.
Description
Technical field
The present invention is relevant for a kind of image display technology, and particularly relevant for a kind of image-driven method and driving circuit of display.
Background technology
In recent years, how to improve the dynamic image fuzzy problem of LCD (LCD), be one of main problem of industry always.The reaction velocity that its origin cause of formation mainly comes from liquid crystal is crossed slow and itself is the type of drive that belongs to the formula of keeping (Hold-type).The problem that reaction velocity is slow excessively has technology such as " (OverDrive) overdrive " can do effective improvement traditionally.Keep the problem of the type of drive of formula, traditionally so that " pulsed drive (Impulsive Drive) is " with " performance prediction and compensation (Motion Estimation andCompensation " two general orientation sustainable developments.Yet no matter be that " overdriving ", " pulsed drive " or " performance prediction and compensation " all need be done a large amount of accesses to storer.In addition, then will cause the bandwidth and the capacity requirement of a large amount of raising storeies if need to combine more than the two.
Fig. 1 representes the schematic diagram of mechanism of traditional pulsed drive.Consult Fig. 1, the mechanism of pulsed drive is according to original image, inserts a darker image in the centre.Darker image is basic with the original image, forms in the gamma curve 104 darker gamma curve 100 of applying mechanically than estimating.And relatively, original image also need be applied mechanically brighter gamma curve 102, the image that makes it become brighter.So because the mean flow rate of two images is unaffected, and because of the insertion of dark picture reaches the effect of " pulsed drive ", thereby can improve the fuzzy problem of dynamic image.The method is called " two gamma " algorithm again.
Fig. 2 representes to realize the traditional images driving circuit synoptic diagram of pulsed drive.Consult Fig. 2, for example with the speed incoming frame multiplier (Frame Doubler) 106 of 60Hz, it at first can be deposited in the storer of frame buffer 108 data of picture frame (Frame).Next, frame multiplier 106 reads out image with the speed (120Hz) of twice again.That is to say, in the time of 16ms, promptly be under the speed of 60Hz, and frame buffer 108 can be written into a new images.Before new images does not write as yet, read old image twice continuously, promptly read old image with the speed of 120Hz.An image of reading is input to reason unit 110, dark place, does dark gamma curve brightness adjustment back output and shows.Another image of reading is input to bright processing unit 112, does bright gamma line brightness adjustment back output and shows.So, can reach, be promoted to the effect of 120Hz from 60Hz the frame updating frequency.Image through 120Hz is applied mechanically different gamma curve respectively, can realize " two gamma " algorithm.
Fig. 3 representes the driving method synoptic diagram according to traditional structure.Consult Fig. 3, frame 114 can be transfused to primitive frame 0 and primitive frame 1 in regular turn with frame 120 in the time of 16ms, and is stored in the frame buffer.Here such as general technology knowledge because an image is by the multi-strip scanning line, for example 900 sweep traces are formed, because of this picture frame for example is to represent the frame of 900 sweep traces to describe.In graphic, primitive frame 0, primitive frame 1... represent the new images of importing in regular turn with 60Hz, contain the data of 900 sweep traces.The image that frame 116,118,122,124 is read with 120Hz is with the adjusted frame of brightness.With primitive frame 114, can from frame buffer, read the image twice of primitive frame 0, therefore can obtain two picture frames 116,118.Display mode be one then one from frame buffer, read in proper order, alternately applying mechanically bright and dark gamma curve more respectively becomes bright frame 0 and spacer 0, then demonstration.Therefore must be earlier etc. after complete the reading of image of previous original frame 0, could then begin to read next image, promptly be primitive frame 1.So this structure must be deposited one whole image in frame buffer, read secondary by the time after new images just import, its operating efficiency still has needs to be hoisted.
How effectively to separate display, problem the such as for example access bandwidth of LCD and storer be excessive still need continue research and development.
Summary of the invention
The present invention provides a kind of image-driven mode and concrete implementation structure of display, can solve the bandwidth of storer and the problem of capacity at least.
The present invention proposes a kind of image-driven method of display, comprises a posterior images frame of depositing a previous picture frame, and wherein this posterior images frame is not an initial image frame.One picture frame is received, and wherein picture frame is divided into a front image frame and comprises the scan-line data and the posterior images frame that belong to forward part and comprise the scan-line data that belongs to the rear section.Again, corresponding said picture frame produces one first display frame and one second display frame shows in regular turn; And all be divided into anterior frame respectively and comprise the scan-line data that belongs to forward part; Comprise the scan-line data that belongs to the rear section with the rear portion frame, show said anterior frame and said rear portion frame simultaneously according to a rule.This rule is included in the anterior frame at first display frame, shows the said front image frame of received said picture frame, and it is through the adjusted view data of one first brightness conditions.The frame at the rear portion of first display frame, the posterior images frame that shows previous picture frame is through the adjusted view data of one second brightness conditions.At the anterior frame of second display frame, the said front image frame that shows received said picture frame is through the adjusted view data of said second brightness conditions.The frame at the said rear portion of second display frame, the said posterior images frame that shows received said picture frame is through the adjusted view data of said first brightness conditions.
Image-driven method according to the display of one embodiment of the invention for example receives said picture frame and receives with a frequency, and produces said first display frame and the multiple velocity rate generation of said second display frame with said frequency, and demonstration in regular turn.
According to the image-driven method of the display of one embodiment of the invention, for example for initial said first display frame, its rear portion picture frame is display image not.
According to the image-driven method of the display of one embodiment of the invention, for example when received said picture frame different with previous said picture frame and when needing, more comprise the data of said picture frame are carried out the processing of overdriving.
The present invention proposes a kind of image-driven method of display, comprises receiving a picture frame, and at least a portion of depositing this picture frame.A scan-line data and a rear portion frame that picture frame has an anterior frame to comprise and belongs to forward part comprise the scan-line data that belongs to the rear section.Respectively anterior frame and rear portion frame are done one first brightness processed, with a first as one first picture frame and one second picture frame.To a second portion of first picture frame, insert the picture frame of previous reception and through the data after one second brightness processed.To a second portion of second picture frame, insert the picture frame of present reception and the data after said second brightness processed of process.Export complete said first picture frame and said second picture frame, supply follow-up demonstration.
The present invention proposes a kind of image driver circuitry of display, comprises one frame buffer, a frame multiplier, one first main feed line impact damper, one first brightness adjustment unit, one second main feed line impact damper and one second brightness adjustment unit.Frame multiplier and frame buffer couple, and receive a picture frame with a first frequency, and according to one scan line order said picture frame are write said frame buffer.The first main feed line impact damper directly receives the sweep trace of picture frame in regular turn, and wherein picture frame is divided into a front image frame and comprises the scan-line data that the belongs to forward part a part of view data as one first output frame; Comprise the scan-line data that belongs to the rear section a part of view data with a posterior images frame as one second output frame.The first brightness adjustment unit and the said first main feed line impact damper couple, with the said picture frame of one first brightness conditions adjustment input.The second main feed line impact damper is read a part of picture frame that said frame buffer is stored through said frame multiplier.The said front image frame of corresponding said first output frame reads the said posterior images frame of the said picture frame of previous reception, or the said posterior images frame of corresponding said second output frame, reads the said front image frame of said picture frame.The second brightness adjustment unit and the said second main feed line impact damper couple, with the said picture frame of one second brightness conditions adjustment input.Front image frame and said posterior images frame constitute said first frame and said second frame after the brightness adjustment, according to second frequency output.
According to the image driver circuitry of the display of one embodiment of the invention, for example the said second frequency of output is many times of said first frequency of input.
According to the image driver circuitry of the display of one embodiment of the invention, for example for initial said first display frame, its rear portion picture frame is display image not.
According to the image driver circuitry of the display of one embodiment of the invention, for example the capacity of said frame buffer is enough stored the data of a picture.
The image driver circuitry that accordings to the display of one embodiment of the invention, for example the capacity of said frame buffer only needs enough data of half picture of storage.
According to the image driver circuitry of the display of one embodiment of the invention, the for example said second main feed line impact damper begins reading of data prior to importing present said picture frame.
The image driver circuitry that accordings to the display of one embodiment of the invention is failed the beginning reading of data in the present said picture frame of input behind the for example said second main feed line impact damper.
The present invention proposes a kind of image driver circuitry of display again, comprises one frame buffer, a frame multiplier, one first main feed line impact damper, one second main feed line impact damper, one the 3rd main feed line impact damper, overdrive device, one first brightness adjustment unit and one second brightness adjustment unit.Frame multiplier and frame buffer couple, and receive a picture frame with a first frequency, according to one scan line order said picture frame are write frame buffer.The first main feed line impact damper directly receives the sweep trace of said picture frame in regular turn, and wherein said picture frame is divided into a front image frame and comprises the scan-line data that the belongs to forward part a part of view data as one first output frame; Comprise the scan-line data that belongs to the rear section a part of view data with a posterior images frame as one second output frame.The second main feed line impact damper is read a part of picture frame that said frame buffer is stored through said frame multiplier; The said front image frame of wherein corresponding said first output frame; Read the said posterior images frame of the said picture frame of previous reception; Read the said front image frame of said picture frame again or the said posterior images frame of corresponding said second output frame.The 3rd main feed line impact damper is read said frame buffer through said frame multiplier and is stored a part of data that belong to previous said picture frame, the said parts of images data that the corresponding said first main feed line impact damper is read.The device of overdriving receives the said parts of images data of said first main feed line impact damper output and the said partial data of said the 3rd main feed line impact damper output, adjusts the brightness of the said parts of images data of said first main feed line impact damper output according to the mechanism of overdriving.The first brightness adjustment unit couples with the said device of overdriving, with the said picture frame of one first brightness conditions adjustment input.The second brightness adjustment unit and the said second main feed line impact damper couple, with the said picture frame of one second brightness conditions adjustment input.Wherein, said front image frame and said posterior images frame, constitute said first frame and said second frame through brightness adjustment back, according to a second frequency and export.
According to the image driver circuitry of the display of one embodiment of the invention, for example when received said picture frame different with previous said picture frame and when needing, just said picture frame is carried out the processing of overdriving.
The present invention proposes a kind of image-driven method of display device again, comprising:
With the multi-strip scanning line of a display frame,, be divided into one first group of sweep trace, with one second group of sweep trace according to one scan line sequence number.Receive an input image data again.This input image data of a first that corresponding first group of sweep trace institute should show is accordinged to a frame sequential and is alternately done the image color correction, for this first group of sweep trace demonstration with one first chroma-luminance correction and one second chroma-luminance correction one of which.This input image data of a second portion that corresponding second group of sweep trace institute should show is accordinged to this frame sequential with other one of which of this first chroma-luminance correction and this second chroma-luminance correction and is alternately done the image color correction.Wherein, in a frame time, show in regular turn that simultaneously of this first group of sweep trace and this second group of sweep trace exports display image.
The present invention proposes a kind of display device again, comprises an array of display, is made up of a plurality of pixel, and this Matrix Display is shown multirow as the multi-strip scanning line, and divides into one first group of sweep trace, with one second group of sweep trace.One drive circuit drives to these a plurality of pixels that should a plurality of sweep traces, to show a view data.Wherein, first group of sweep trace and second group of sweep trace show in the image demonstration time simultaneously in regular turn, and be alternate for two chroma-luminance corrections of this first group of sweep trace and this second group of sweep trace.
For let above-mentioned and other purposes of the present invention, feature and advantage can be more obviously understandable, hereinafter is special lifts preferred embodiment, and conjunction with figs., specifies as follows.
Description of drawings
Fig. 1 representes the schematic diagram of mechanism of traditional pulsed drive.
Fig. 2 representes to realize the traditional images driving circuit synoptic diagram of pulsed drive.
Fig. 3 representes the driving method synoptic diagram according to traditional structure.
Fig. 4 representes according to the embodiment of the invention, the image-driven method synoptic diagram of display.
Fig. 5 representes according to the embodiment of the invention, a kind of synoptic diagram of image driver circuitry of display.
Fig. 6 representes the time sequential routine synoptic diagram according to the circuit of Fig. 5.
Fig. 7 representes according to another embodiment of the present invention, a kind of synoptic diagram of image driver circuitry of display.
Fig. 8 representes the time sequential routine synoptic diagram according to the circuit of Fig. 7.
Fig. 9 representes to consider the schematic diagram of mechanism overdrive according to the embodiment of the invention.
Figure 10 representes according to another embodiment of the present invention, a kind of synoptic diagram of image driver circuitry of display.
Figure 11 representes the circuit according to Figure 10, reaches the sequential synoptic diagram of " two gamma " structure in conjunction with " overdriving ".
Figure 12 representes according to an embodiment, sweep trace frame sequential synoptic diagram.
Figure 13 representes according to an embodiment, the display device synoptic diagram.
The main element symbol description
100: dark gamma curve
102: bright gamma curve
104: gamma curve
106: the frame multiplier
108: frame buffer
110: reason unit, dark place
112: bright processing unit
114,116,118,120,122,124: frame
200,202,204,206,208,210,212,214: frame
220,240,252: the frame multiplier
222,254: frame buffer
224,244,256,258: preceding main feed line impact damper
226,246,260: the present frame line buffer
228,248,264: dark gamma adjustment unit
230,250,266: bright gamma adjustment unit
242: the field impact damper
232-2 38: signal
268-276: signal
300,312: frame
302: go up field
304: following field
306,308: scanning-line signal
310: the clear area
400: display device
402: array of display
404: data drive circuit
406: gate driver circuit
408: time schedule controller
Embodiment
The image-driven method of display panel of the present invention for example can be useful in LCD, or the image-driven of other plane formula displays.The present invention exports raw frames and the new picture that will insert simultaneously, and raw frames like this need not passed through depositing of storer and can be exported immediately.Also only need deposit half image during new picture that calculating will be inserted and get final product, so can lower the bandwidth and the capacity requirement of storer.Explicit mode of the present invention more can be applicable to any algorithm that changes into 120Hz from 60Hz.In addition, the present invention also can combine " overdriving " to promote the liquid crystal reaction velocity.The present invention only does " overdriving " to raw frames, therefore also only need deposit half image and get final product.Below lift some embodiment as description of the invention, but the present invention is not limited only to the embodiment that lifts.In addition, a plurality of embodiment that lift also can do suitable combination each other, and it need not is embodiment independently individually.
Fig. 4 representes according to the embodiment of the invention, the image-driven method synoptic diagram of display.Consult Fig. 4, picture frame the 200, the 210th is according to primitive frame 0, the primitive frame 1 of speed input.Picture frame the 202,208,212, the 214th, the picture frame that export.Here only do the explanation of display driver mechanism with two frames.Again, the speed of input for example is 60Hz, and estimates that wanting the speed of output image is its twice, for example 120Hz.
The picture frame 200 of first input is in original state, with primitive frame 0 expression.The present invention gets the picture line that a complete picture frame for example contains 900 levels and explains as instance, but in fact need not to limit the quantity of frame scan line.
Mechanism of the present invention comprises that arranging to make bright and dark picture to be divided into two parts exports demonstration simultaneously.At first picture is divided into two blocks up and down, is called anterior frame again and comprises the scan-line data that belongs to forward part, comprise the scan-line data that belongs to the rear section with the rear portion frame.When the first half was shown as bright picture, then Lower Half showed dark picture, otherwise when if the first half is shown as dark picture, then Lower Half shows bright picture.Because its display mode is brightly secretly alternately to read simultaneously and show, therefore for example only needs the velocity sweeping with 60Hz.But in the time of a line originally, must see respectively respectively one of the bright dark data of forwardly frame and rear portion frame simultaneously off.Therefore with single pixel, be equal to or do the variation of 120Hz.Yet because bright dark picture is shown in the first half or Lower Half respectively; Therefore can differ from half image from the position that storer reads; And the starting point that is shown in picture also can differ from half image, and the highlights image outputs to the last item by article one always, as the 900th; Dark portion image outputs to the 450th from article one after then outputing to the 900th by the centre as the 451st always more always.In addition, because same picture need show bright dark two images simultaneously, so the sequential control of LCD also must relative making an amendment.Differing from half image at this with bright dark picture is example, right this skill of convention personage can with as differ from 1/3 image or as differ from 2/3 image etc. and go to realize also not depart from the scope of the present invention this way.
Thin portion is an original state when primitive frame 0 input, and this moment is because the previous image of Shang Weiyou.In the anterior frame 204 of first picture frame 202, the frame data that will belong to this part are inserted, and directly export demonstration, for example with the data presentation after the bright processing of gamma, promptly are bright frames 0.Rear portion frame 206 can be kept not video data at this moment.Then when bright frame 0 is shown to the rear portion frame 206 of second picture frame 208, the data that continue to show the primitive frame 0 that receives at present with the bright processing of gamma after for follow-up demonstration.Yet at the anterior frame 204 of second picture frame 208, carry out the demonstration of spacer 0 simultaneously.This spacer 0 is the anterior frame data by the primitive frame of receiving at present 0, with the spacer 0 after the reason of gamma dark place.Spacer 0 constitutes the image of primitive frame 0 with bright frame 0, but bright and dark part is arranged.First picture frame 202 and second picture frame 208 show that with the speed of twice for example the frequency with 120Hz shows.
Aforementioned is the display mechanism of the primitive frame 0 of original state.According to similar principle, continue to show the picture frame of follow-up reception.For example do explanation with primitive frame 1.Primitive frame 1 is new image, so directly insert the anterior frame 204 of first picture frame 212, for example does the bright frame 1 after the bright processing, for follow-up demonstration.Side by side, belong to the data of the rear portion frame of primitive frame 0, the spacer 0 after the reason of dark place is also simultaneously done demonstration at the rear portion frame 206 of first picture frame 212.In other words, in first picture frame 212, contain the view data of the previous primitive frame 0 of some a present primitive frame 1 and a part, show simultaneously.
Then, the display mechanism with second picture frame 208 is the same.The rear portion frame 206 of second picture frame 214; During the bright frame 1 of the rear section data that are shown to primitive frame 1 when bright frame 1 after bright processing; The anterior frame 204 of second picture frame 214 shows the spacer 1 of forward part data after the reason of dark place of primitive frame 1; The primitive frame of follow-up reception is mechanism demonstration according to this also, reaches the effect of display frequency multiplication.
The data of primitive frame are to be deposited at frame buffer in addition.And the data of the new present primitive frame of the accepting frame buffer that can write direct, can be not influenced.The capacity of frame buffer for example only need be stored an image and get final product.If when arranging to write new data to frame buffer, earlier the data of corresponding scanning line are read, then the capacity of frame buffer can lack than the content of a picture frame, for example the capacity of half frame.In addition, mechanism of the present invention also can be incorporated the processing of overdriving into, for example only needs that bright frame is done the processing of overdriving and gets final product.The circuit embodiments of implementing is below described.
Fig. 5 representes according to the embodiment of the invention, a kind of synoptic diagram of image driver circuitry of display.Consult Fig. 5, a frame multiplier 220 couples with one frame buffer 222, and with a first frequency, for example 60Hz receives a picture frame, and its order according to sweep trace writes frame buffer 222 with picture frame.
In addition, one first main feed line impact damper, for example the present frame line buffer 226, directly receive one or multi-strip scanning line of picture frame in regular turn, and it is decided according to the capacity of impact damper.Certainly entire image generally is made up of the multi-strip scanning line, and it can cooperate frame buffer to operate.Picture frame is mechanism as described in Figure 4, is divided into a part of view data of a front image frame as one first output frame, and it more for example is the data of sweep trace 1 to sweep trace 450.In addition, the posterior images frame as a part of view data of one second output frame, for example is the data of sweep trace 451 to sweep trace 900.
One first brightness adjustment unit 230 for example is bright gamma adjustment unit 230, couples with present frame line buffer 226, with the picture frame of one first brightness conditions adjustment input.
In addition; One second main feed line impact damper, for example preceding main feed line impact damper 224 is read a part of picture frame that frame buffer 222 is stored through frame multiplier 220; The front image frame of wherein corresponding first output frame; Read the posterior images frame of the picture frame of previous reception, and the posterior images frame of corresponding second output frame, the front image frame of reading images frame.
One second brightness adjustment unit, for example dark gamma adjustment unit 228 couples with preceding main feed line impact damper 224, with this picture frame of one second brightness conditions adjustment input.Front image frame and this posterior images frame constitute this first frame and this second frame after the brightness adjustment, according to second frequency output.For example, primitive frame is with the frequency input of 60Hz, and first frame that produces and this second frame are with the frequency output of 120Hz, for follow-up demonstration.
Because vertical direction is with the velocity sweeping of 60Hz, therefore the data of bright picture do not need to deposit via the storer of frame buffer, can directly directly be read by data input pin.And dark picture and bright picture have the mistiming of half image, therefore need last image is deposited in the impact damper, so that the image output of dark picture to be provided.Yet for showing bright and dark each line in the time that is implemented in a line; Obtain bright dark picture by front end and need distinctly to deposit in earlier line buffer 224,226; Bright dark data in the line buffer are read individually with the speed of twice by the rear end again, apply mechanically the relative position that is shown in picture after other gamma curve respectively.So can reach the effect that 60Hz changes into 120Hz, but in the time of 16ms, only need to read an image, so bandwidth demand only is the half the of traditional structure from frame buffer 222.
Fig. 6 representes the time sequential routine synoptic diagram according to the circuit of Fig. 5.Consult Fig. 6, the frame data of signal 232 representative inputs for example comprise 900 sweep traces, and for example sweep trace 1 to 450 are set at anterior frame, and sweep trace 451 to 900 is set at the rear portion frame.Article 900, sweep trace can be by input in regular turn in the time of 16ms.
Signal 234 representatives write the storer of frame buffer 222, for example SDRAM, and the sequential that is input to present frame line buffer 226.Then, signal 236 representatives are by the sequential of frame multiplier reading scan line data.Because data write sweep trace 1 earlier, what still will read is sweep trace 451, and the operation that therefore writes can not change previous frame data.Generally speaking, after the image input, can write frame buffer 222 and line buffer 226 at once, after line buffer stores certain capacity into, then can begin to read from line buffer with the fast speed of twice.Signal 238 representatives are read and are belonged to two sweep traces anterior and the rear portion different blocks; Formation one image shows bright and dark data simultaneously after applying mechanically bright gamma curve and dark gamma curve respectively, and for example the bright sweep trace 1 of image and the scanning in darkness line 451 of last image are shown on same image at present.Behind the bright sweep trace 450 that has shown present image, shown in dotted line, just begin to show second picture frame.Second picture frame comprises the present picture frame that continue to show the rear portion, begins to show from the bright sweep trace 451 of present image.The block that originally belonged to sweep trace 1 to 450 then shows the front image frame of present image, but passes through the processing of dark gamma curve respectively.A pair of sweep trace in the signal 238, the scan-line data of back reads aftertreatment by signal 236.
Fig. 7 representes according to another embodiment of the present invention, a kind of synoptic diagram of image driver circuitry of display.Consult Fig. 7, this image driver circuitry comprises frame multiplier 240, field impact damper 242, preceding main feed line impact damper 244, present frame line buffer 246, dark gamma adjustment unit 248, bright gamma adjustment unit 250.The circuit of Fig. 7 is identical haply with the circuit of Fig. 5 and operation mechanism, and difference therebetween is the adjustment of reading sequential, and a part of data that make the capacity of field impact damper 242 only need to store an image get final product, and preferable for example half view data gets final product.
Fig. 8 representes the time sequential routine synoptic diagram according to the circuit of Fig. 7.Consult Fig. 8, signal 236 is sequential of sense data.When if the capacity of field impact damper 242 is not the data of whole image, writes data 234 and perhaps can change original data bright or the dark place reason of not carrying out as yet.Yet signal 236 is just to read at the preceding of write signal 234.Last sweep trace of a pair of sweep trace in the signal 238 is to handle earlier from the data that signal 236 is read, and therefore can not destroy still untreated data.The capacity of field impact damper 242 just can reduce.This embodiment is an example with the capacity of storing half view data, but is not unique condition.Again, bright and dark processing also only is embodiment, the demonstration of frame also can bright frame and spacer exchange, display mechanism can not change.Yet present image has better visual effect with the mode that bright gamma curve shows earlier.
As aforementioned, above-mentioned mechanism is incorporated the operation of overdriving in addition.Fig. 9 representes to consider the schematic diagram of mechanism overdrive according to the embodiment of the invention.Consult Fig. 9, the picture frame so that 60Hz shows can show an image in 16ms.With regard to single pixel, when view data had brightness to change, the actual light intensity that produces was to the change of time curve.The solid line of ladder is the brightness variation of raw image data among Fig. 9, and after " two gamma " calculation, actual output data will present bright dark alternate.Yet when the brightness of two original images in front and back changes greatly, promptly need consider the problem that the liquid crystal reaction time is slow excessively.Heavy line among Fig. 9; Be because the brightness of present image (for example frame 2) and the brightness of last image (for example frame 1) have bigger drop; Therefore the bright picture of frame 2 images can't immediate reaction to this brightness that has; And cause the overall brightness of frame 2 images drop to be arranged with frame 3 images, so also can cause the fuzzy of dynamic image.And to such problem, " overdriving " is an effective solution, therefore combines " overdriving " and " two gamma " algorithm to be only total solution.Yet for saving the access of storer, the present invention only does " overdriving " to bright picture, like the processing of the dotted line among Fig. 9, with the compensation appropriate brightness.The storage access that so promptly can simplify most accomplishes that combinations " overdrived " and the solution of " two gamma " algorithm.
Figure 10 representes according to another embodiment of the present invention, a kind of synoptic diagram of image driver circuitry of display.Consult Figure 10, the image driver circuitry of display comprises one frame buffer 254, a frame multiplier 252, one first main feed line impact damper 260, one second main feed line impact damper 256, one the 3rd main feed line impact damper 258, overdrive device 262, one first brightness adjustment unit 266 and one second brightness adjustment unit 264.Frame multiplier 252 couples with frame buffer 254, receives a picture frame with a first frequency, according to the sweep trace order picture frame is write frame buffer 254.
The first main feed line impact damper 260 directly receives the sweep trace of said picture frame in regular turn.Picture frame also is divided into a part of view data of a front image frame as one first output frame; And one the posterior images frame as a part of view data of one second output frame.The second main feed line impact damper 256 is read a part of picture frame that frame buffer 254 is stored through frame multiplier 252.This part picture frame is the front image frame of corresponding first output frame, reads the posterior images frame of the picture frame of previous reception.Or the posterior images frame of corresponding second output frame, the front image frame of reading images frame.The 3rd main feed line impact damper 258 is read a part of data that 254 storages of frame buffer belong to previous said picture frame through frame multiplier 252, a part of view data that the corresponding first main feed line impact damper 260 is read.The device 262 of overdriving receives the parts of images data of the first main feed line impact damper, 260 outputs and the partial data of the 3rd main feed line impact damper 258 outputs.The device 262 of overdriving is adjusted the parts of images data of the first main feed line impact damper, 260 outputs according to the mechanism of overdriving.The first brightness adjustment unit 266 couples with the device 262 of overdriving, with the picture frame of first brightness conditions adjustment input.The second brightness adjustment unit 264 and the second main feed line impact damper 256 couple, with the picture frame of one second brightness conditions adjustment input.Wherein, front image frame and posterior images frame, constitute said first frame and said second frame through brightness adjustment back, according to second frequency and export.
Figure 10 circuit is still similar with the circuit of Fig. 5, only is the mechanism of the overdriving adding with Fig. 9.In other words, when the difference of the previous brightness of image of brightness ratio of present image is when a predetermined value is above, just need do the processing of overdriving.The processing of overdriving needs previous view data, therefore deposits view data earlier through the 3rd main feed line impact damper 258, as the one of which of the needed input data of overdriving.Above-mentioned only is an embodiment who starts the mechanism of overdriving.Generally speaking, be to set according to actual needs startup opportunity of the mechanism of overdriving, for example different with previous picture frame and when needing when received picture frame, just can comply with the needs startup processing of overdriving.
Practical operation, for bright picture is done " overdriving ", the data that need deposit last picture are to compare; Therefore when data are imported with 60Hz; The result who obtains " overdriving " after the comparison at once can bright picture output, and also can extract required preceding half view data of dark picture from the last picture of depositing with the time, likewise two pictures through other gamma curve adjustment after; Get final product output image, accomplish " two gamma " calculation.Because dark required preceding half view data of picture is contained in last required complete picture of " overdriving ", therefore need not increase the capacity requirement of storer.Yet because need with the time to bright picture of memory fetch and the required data of dark picture, so bandwidth is the twice of previous embodiment.
Figure 11 representes the circuit according to Figure 10, reaches the sequential synoptic diagram of " two gamma " structure in conjunction with " overdriving ".Consult Figure 11, because after data-signal 268 is with the 60Hz input, at once in write store and the present main feed line register, shown in signal 270.Want the computing required data of " overdriving ",, must do sth. in advance to be read in order to avoid the signal that newly write 270 covers data like signal 274.For signal 272, the data that it reads the rear portion frame earlier like previous identical mechanism.Last signal 276 after treatment is with the speed output of twice, for follow-up demonstration.
That is to say, after the line buffer of the line buffer of this picture and last picture stores the data of some into, can begin to do " overdriving " computing of bright picture with the speed of twice.Data with dark picture of time also begin to read and be stored in line buffer 256 from frame buffer 254.After the computing of bright picture executes demonstration output, and then also read from line buffer 256 with the fast speed of twice, accomplish the demonstration of dark picture image.
In the image-driven method that the present invention proposes, consist essentially of and receive a picture frame, and at least a portion of depositing this picture frame.Picture frame has an anterior frame and a rear portion frame.Respectively anterior frame and rear portion frame are done one first brightness adjustment, with a first as one first picture frame and one second picture frame.To a second portion of first picture frame, insert the picture frame of previous reception and through the data after one second brightness processed.To a second portion of second picture frame, insert the picture frame of present reception and through the data after second brightness processed.This first picture frame and this second picture frame that follow, output are complete supply follow-up demonstration.
The present invention can be applicable to display device.Figure 12 representes according to an embodiment, sweep trace frame sequential synoptic diagram.Consult Figure 12, display device has many horizontal scanning line according to the size of resolution.Present embodiment is example G1-G900 with 900 sweep traces.Each sweep trace structure being aligned frame.Whole image has 900 sweep traces to constitute a frame, shows an image with the frequency of 120Hz.Yet be noted that the mechanism of similar Fig. 4, a complete image is the frame 300 that is made up of general demonstration speed 60Hz the frame of two 120Hz.
According to the present invention, for example frame comprises on one field 302 and field 304 once.Wherein a kind of mode for example be planning sweep trace G1-G450 as last field, in addition with sweep trace G451-G900 as field down.Scanning-line signal 306,308 among the figure, the pixel data that allows to belong to this sweep trace shows.The present invention will belong to the view data of field 302 with a color brightness correction, and the view data of field 304 is with another chroma-luminance correction under will belonging to.In a frame time, show in regular turn simultaneously and go up field 302 and following field 304.Yet, at the next frame that is right after 312, the correction meeting alternate of chroma-luminance.For example two of field 302 bright and dark variations of consecutive frame meeting on belonging to, and belong to the variations that two consecutive frames of field 304 can be bright and dark down.Section 310 is safe white spaces of a picture, yet this case technology also can contain section 310, and the quantity that so goes up the sweep trace of field just is not limited to G1-G450, and the sweep trace of field also is not limited to G451-G900 down.
With regard to display device, driving mechanism of the present invention is installed on the driving circuit of display device in addition.Figure 13 representes according to an embodiment, the display device synoptic diagram.Consult Figure 13, display device 400 comprises an array of display 402, is made up of a plurality of pixel, and this Matrix Display is shown multirow as the multi-strip scanning line, and divides into one first group of sweep trace, with one second group of sweep trace.Driving circuit comprises data drive circuit 404, and the gradation data of pixel is provided, and gate driver circuit 406 provides sweep signal with the driven sweep line.Time schedule controller 408 in addition, respectively data driving circuit 404 and gate driver circuit 406 done sequential control, with display image.Mechanism of the present invention can be installed in the driving circuit, reaches desired controlling mechanism.Therein, first group of sweep trace and second group of sweep trace show in the image demonstration time simultaneously in regular turn, and be alternate for two chroma-luminance corrections of this first group of sweep trace and this second group of sweep trace.
Though the present invention with preferred embodiment openly as above, so it is not in order to limit the present invention.Those of ordinary skill under any in the technical field under the situation that does not break away from the spirit and scope of the present invention, can carry out various changes and modification.Therefore, protection scope of the present invention is as the criterion with the scope of the claim that proposed.
Claims (26)
1. the image-driven method of a display comprises:
Deposit a posterior images frame of a previous picture frame, wherein this posterior images frame is not an initial image frame;
Receive a picture frame, be divided into a front image frame and comprise the scan-line data and the posterior images frame that belong to forward part and comprise the scan-line data that belongs to the rear section; And
To should picture frame producing one first display frame and one second display frame shows in regular turn; And all be divided into anterior frame respectively and comprise the scan-line data that belongs to forward part; Comprise the scan-line data that belongs to the rear section with the rear portion frame; Showing simultaneously according to a rule should front portion frame and this rear portion frame, and this rule comprises:
This front portion frame of this first display frame, this front image frame that shows received this picture frame is through the adjusted view data of one first brightness conditions;
This rear portion frame of this first display frame, this posterior images frame that shows this previous picture frame is through the adjusted view data of one second brightness conditions;
This front portion frame of this second display frame, this front image frame that shows received this picture frame is through the adjusted view data of this second brightness conditions; And
This rear portion frame of this second display frame, this posterior images frame that shows received this picture frame is through the adjusted view data of this first brightness conditions.
2. the image-driven method of display as claimed in claim 1 wherein receives this picture frame and receives with a frequency, produces with the multiple velocity rate of this frequency and produce this first display frame and this second display frame, and shows in regular turn.
3. the image-driven method of display as claimed in claim 1, wherein for this initial first display frame, its rear portion picture frame is display image not.
4. the image-driven method of display as claimed in claim 1, wherein when received this picture frame and previous this picture frame not simultaneously, comply with and need more comprise the data of this picture frame are carried out the processing of overdriving.
5. the image driver circuitry of a display comprises:
One frame buffer;
One frame multiplier couples with this frame buffer, receives a picture frame with a first frequency, according to one scan line order this picture frame is write this frame buffer;
One first main feed line impact damper directly receives the one scan line of this picture frame in regular turn, and wherein this picture frame is divided into a front image frame and comprises the scan-line data that the belongs to forward part a part of view data as one first output frame; Comprise the scan-line data that belongs to the rear section a part of view data with a posterior images frame as one second output frame;
One first brightness adjustment unit couples with this first main feed line impact damper, with this picture frame of one first brightness conditions adjustment input;
One second main feed line impact damper; Read a part of picture frame that this frame buffer is stored through this frame multiplier; Wherein to this front image frame that should first output frame; Read this posterior images frame of this picture frame of previous reception, or, read this front image frame of this picture frame this posterior images frame that should second output frame; And
One second brightness adjustment unit couples with this second main feed line impact damper, with this picture frame of one second brightness conditions adjustment input,
Wherein this front image frame and this posterior images frame constitute this first frame and this second frame after the brightness adjustment, according to second frequency output.
6. the image driver circuitry of display as claimed in claim 5, wherein this second frequency of output is many times of this first frequency of input.
7. the image driver circuitry of display as claimed in claim 5, wherein for this initial first display frame, its rear portion picture frame is display image not.
8. the image driver circuitry of display as claimed in claim 5, wherein the capacity of this frame buffer is enough stored the data of a picture.
9. the image driver circuitry of display as claimed in claim 5, wherein the capacity of this frame buffer only needs enough to store the data of half picture.
10. the image driver circuitry of display as claimed in claim 5, wherein this second main feed line impact damper begins reading of data prior to importing this present picture frame.
11. the image driver circuitry of display as claimed in claim 5 is wherein failed the beginning reading of data in this present picture frame of input behind this second main feed line impact damper.
12. the image driver circuitry of a display comprises:
One frame buffer;
One frame multiplier couples with this frame buffer, receives a picture frame with a first frequency, according to one scan line order this picture frame is write this frame buffer;
One first main feed line impact damper directly receives the one scan line of this picture frame in regular turn, and wherein this picture frame is divided into a front image frame and comprises the scan-line data that the belongs to forward part a part of view data as one first output frame; Comprise the scan-line data that belongs to the rear section a part of view data with a posterior images frame as one second output frame;
One second main feed line impact damper; Read a part of picture frame that this frame buffer is stored through this frame multiplier; Wherein to this front image frame that should first output frame; Read this posterior images frame of this picture frame of previous reception, or, read this front image frame of this picture frame this posterior images frame that should second output frame;
One the 3rd main feed line impact damper is read this frame buffer through this frame multiplier and is stored a part of data that belong to previous this picture frame, to these parts of images data that should the first main feed line impact damper be read;
One device of overdriving receives these parts of images data of this first main feed line impact damper output and this partial data of the 3rd main feed line impact damper output, according to one overdrive these parts of images data that this first main feed line impact damper of mechanism adjustment exports brightness;
One first brightness adjustment unit couples with this device of overdriving, with this picture frame of one first brightness conditions adjustment input;
One second brightness adjustment unit couples with this second main feed line impact damper, with this picture frame of one second brightness conditions adjustment input,
Wherein this front image frame and this posterior images frame constitute this first frame and this second frame after the brightness adjustment, according to second frequency output.
13. the image driver circuitry of display as claimed in claim 12, wherein this second frequency of output is many times of this first frequency of input.
14. the image driver circuitry of display as claimed in claim 12, wherein for this initial first display frame, its rear portion picture frame is display image not.
15. the image driver circuitry of display as claimed in claim 12, wherein the capacity of this frame buffer is enough stored the data of a picture.
16. the image driver circuitry of display as claimed in claim 12, wherein the capacity of this frame buffer is enough stored the data of a picture.
17. the image driver circuitry of display as claimed in claim 12, wherein this second main feed line impact damper begins reading of data prior to importing this present picture frame.
18. the image driver circuitry of display as claimed in claim 12 is wherein failed the beginning reading of data in this present picture frame of input behind this second main feed line impact damper.
19. the image driver circuitry of display as claimed in claim 12, wherein this mechanism of overdriving is not comply with simultaneously and need carry out the processing of overdriving to this picture frame with previous this picture frame when received this picture frame.
20. the image-driven method of a display comprises:
Receive a picture frame, and deposit at least a portion of this picture frame, a scan-line data and a rear portion frame that this picture frame has an anterior frame to comprise and belongs to forward part comprise the scan-line data that belongs to the rear section;
Respectively this front portion frame and this rear portion frame are done one first brightness processed, with a first as one first picture frame and one second picture frame;
To a second portion of this first picture frame, insert this picture frame of previous reception, through the data after one second brightness processed;
To a second portion of this second picture frame, insert this picture frame of present reception, through the data after this second brightness processed; And
Export this complete first picture frame and this second picture frame, supply follow-up demonstration.
21. the image-driven method of a display device comprises:
With the multi-strip scanning line of a display frame,, be divided into one first group of sweep trace, with one second group of sweep trace according to one scan line sequence number;
Receive an input image data;
To should first group of sweep trace this input image data of a first that should show with one first chroma-luminance correction and one second chroma-luminance correction one of which, alternately do the image color correction according to a frame sequential, show for this first group of sweep trace;
To should second group of sweep trace this input image data of a second portion that should show with this first chroma-luminance correction and this second chroma-luminance correction in addition one of which alternately do the image color correction according to this frame sequential; And
In a frame time, show an output display image of this first group of sweep trace and this second group of sweep trace simultaneously in regular turn.
22. the image-driven method of display device as claimed in claim 21, wherein this first group of sweep trace and this second group of sweep trace show the half the or image of an estimated rate of this output display image individually.
23. the image-driven method of display device as claimed in claim 21, wherein this frame time of this display frame is 120Hz.
24. a display device comprises:
One array of display is made up of a plurality of pixel, and this Matrix Display is shown multirow as the multi-strip scanning line, and divides into one first group of sweep trace, with one second group of sweep trace;
One drive circuit drives these a plurality of pixels that should a plurality of sweep traces, showing a view data,
Wherein this first group of sweep trace and this second group of sweep trace show simultaneously in the image demonstration time in regular turn, and are alternate for two chroma-luminance corrections of this first group of sweep trace and this second group of sweep trace.
25. display device as claimed in claim 24, wherein this first group of sweep trace can equate with the sweep trace quantity of this second group of sweep trace or be unequal.
26. display device as claimed in claim 24, wherein this first group of sweep trace and this second group of sweep trace show with the frequency of 120Hz.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200810002642XA CN101488325B (en) | 2008-01-14 | 2008-01-14 | Image driving method and driving circuit for display, and display apparatus |
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| CN200810002642XA CN101488325B (en) | 2008-01-14 | 2008-01-14 | Image driving method and driving circuit for display, and display apparatus |
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| CN101488325B true CN101488325B (en) | 2012-03-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1279560A (en) * | 1999-07-02 | 2001-01-10 | 深圳市赛格集团有限公司 | Method and device for interlaced display of video signals on plasma display |
| EP1097593A1 (en) * | 1998-07-17 | 2001-05-09 | THOMSON multimedia | Method for timing data processing and implementing device |
| EP1387577A2 (en) * | 2002-07-25 | 2004-02-04 | Samsung Electronics Co., Ltd. | Deinterlacing apparatus and method |
| CN1577482A (en) * | 2003-06-27 | 2005-02-09 | 株式会社日立显示器 | Display device and driving method thereof |
| CN1592356A (en) * | 2003-08-27 | 2005-03-09 | 三洋电机株式会社 | Image signal processor circuit and portable terminal device |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1097593A1 (en) * | 1998-07-17 | 2001-05-09 | THOMSON multimedia | Method for timing data processing and implementing device |
| CN1279560A (en) * | 1999-07-02 | 2001-01-10 | 深圳市赛格集团有限公司 | Method and device for interlaced display of video signals on plasma display |
| EP1387577A2 (en) * | 2002-07-25 | 2004-02-04 | Samsung Electronics Co., Ltd. | Deinterlacing apparatus and method |
| CN1577482A (en) * | 2003-06-27 | 2005-02-09 | 株式会社日立显示器 | Display device and driving method thereof |
| CN1592356A (en) * | 2003-08-27 | 2005-03-09 | 三洋电机株式会社 | Image signal processor circuit and portable terminal device |
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| CN101488325A (en) | 2009-07-22 |
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