CN1332371C - Liquid crystal drive circuit - Google Patents
Liquid crystal drive circuit Download PDFInfo
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- CN1332371C CN1332371C CNB031102115A CN03110211A CN1332371C CN 1332371 C CN1332371 C CN 1332371C CN B031102115 A CNB031102115 A CN B031102115A CN 03110211 A CN03110211 A CN 03110211A CN 1332371 C CN1332371 C CN 1332371C
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Abstract
The purpose of the present invention is to provide a liquid crystal drive circuit. Voltage applied to liquid crystal is properly controlled, and the response speed of the liquid crystal can be correctly controlled. The liquid crystal drive circuit of the present invention is provided with an image data processing influence device, for example, the existing image is coded, a coded image is decoded, the coded picture is delayed for one frame period, the delayed coded picture is coded, two decoding images are used, and corrected data used for correcting a tone value of the existing image is generated. A coding process step reduces the image data quantity and secondary quantity of frame memories required by the delay of the image. The corrected data perfectly leads liquid crystal to reach a transmissivity value which is corresponding to the tone value of the existing image in about a frame period. The liquid crystal drive circuit of the present invention can correctly control the response speed of liquid crystal.
Description
Technical field
The invention relates to the liquid crystal indicator that uses liquid crystal panel, especially relevant for liquid crystal display drive circuit and LCD drive method in order to improve response speed of liquid crystal.
Background technology
Liquid crystal has to tackle the shortcoming that changes fast dynamic image because of transmissivity changes according to the cumulative response effect.In order to address this is that, have liquid crystal drive voltage by with tonal variation the time and be made as greatlyyer than general driving voltage, improve the method for response speed of liquid crystal.
Figure 72 is that expression utilizes above-mentioned method to drive the figure of the LCD drive g device example of liquid crystal, and its details for example is recorded in the spy and opens in the flat 6-189232 communique.At Figure 72, the 100th, the A/D translation circuit, the 101st, keep the video memory of data of a frame of picture signal, the 102nd, the comparator circuit of output tonal variation signal after the view data before view data and the frame relatively now, the 103rd, the driving circuit of liquid crystal panel, the 104th, liquid crystal panel.
Secondly explanation action.A/D translation circuit 100 according to the clock of fixed frequency picture signal is taken a sample, be transformed into the view data of digital form after, to video memory 101 and comparator circuit 102 outputs.Video memory 101 view data imported is postponed to be equivalent to picture signal a frame during after, to comparator circuit 102 outputs.Comparator circuit 102 is relatively after the view data before the frame of the existing view data of A/D translation circuit 100 outputs and video memory 101 outputs, exports the tonal variation signal of the tonal variation of both images of expression to driving circuit 103 with existing view data.Driving circuit 103 is supplied with the driving voltage higher than general liquid crystal drive voltage for tone value according to the pixel that the tonal variation signal increases, and drives the display pixel of liquid crystal panel 104, supplies with low voltage drive for the pixel that is reduced.
At the image display device shown in Figure 72, the display pixel number of liquid crystal panel 104 becomes for a long time, because of the view data of a frame being write at video memory 101 increases, has required memory span and becomes big problem.Open in the image display device of flat 4-204593 communique record the spy,, shown in Figure 73,4 pixels are distributed an address of video memory in order to reduce the capacity of video memory 101.That is,, be stored in video memory, when reading video memory,, reduce the capacity of video memory by reading the view data identical repeatedly with the pixel of being stored for the pixel that is extracted every pixel decimation view data in length and breadth.For example, for (a, B), (b, A), (b, pixel B) are read the data of address 0.
As noted above, bigger than general liquid crystal drive voltage under the situation of the variation before tone value and frame by making liquid crystal drive voltage, can improve response speed of liquid crystal., because of the variation according to the magnitude relationship of tone value only makes the liquid crystal drive voltage increase and decrease, and under the situation about before tone value is than a frame, increasing and its recruitment irrespectively apply without exception than general high driving voltage.Thereby, in the small situation of the variation of tone value, because of liquid crystal being applied too high voltages the image quality deterioration takes place.
In addition, shown in Figure 73, in the view data of abstract image storer 101 and reduce the situation of the capacity of video memory 101, problem shown below takes place.Figure 74 is because of extracting the key diagram of handling the problem that takes place in order to explanation.At Figure 74, (a) be illustrated in the view data of n+1 frame, (b) expression is extracted the view data of processing to the image of the n+1 frame shown in (a), and (c) expression has been to having carried out extracting the view data of being read after the view data interpolation of handling, (d) view data of the n frame before frame of expression.Shown in Figure 74 (a), (d), the image of n frame is identical with the image of n+1 frame.
Carrying out under the extraction disposition, shown in Figure 74 (c), (B, a), (B reads on view data b) that (A, view data a) is in that (B, c) (B reads (A, view data c) on view data d).That is actual view data of reading tone value 150, with the view data of tone value 50.Thereby, although the ratio before image and the frame does not change, the n+1 frame (B, a), (B, b), (B, c), (B, pixel d) is to drive than general high driving voltage.
So carrying out under the extraction disposition, correctly do not control voltage in the part that view data is extracted, take place by the problem that applies the caused image quality deterioration of unnecessary voltage.
Summary of the invention
The present invention proposes in view of the above-mentioned problems, and its purpose is to provide a kind of liquid crystal display drive circuit and LCD drive method, by suitably controlling the voltage that liquid crystal is applied, can correctly control response speed of liquid crystal.
Another purpose is to provide a kind of liquid crystal display drive circuit and LCD drive method, in situation about having reduced in order to the capacity of the frame memory of reading an image before the frame, also can correctly control the voltage that liquid crystal is applied.
The invention provides a kind of liquid crystal display drive circuit, the tone value generation view data according to the input picture that is made of a series of frame by liquid crystal being applied the voltage according to described view data decision, makes it show input picture.
First kind of liquid crystal display drive circuit of the present invention comprises: and the frame correspondence of input picture will show picture coding, the device of the image of output and described existing image corresponding codes; With described coded image decoding, the device of first decoded picture of output and existing image correspondence; Make described coded image postpone to be equivalent to a frame during device; With the described coded image decoding after postponing, export the device of second decoded picture; Produce the correction device of the correction data of the tone value of image now according to first decoded picture and second decoded picture; And according to showing the device that image and correction data produce described view data.
The tone value that will show image in the correction data of this situation is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
The device that produces correction data also comprises: the quantization digit of the tone value of first decoded picture and second decoded picture is reduced, produce and the 3rd decoded picture of the first decoded picture correspondence and with the device of the 4th decoded picture of the second decoded picture correspondence; Reach device according to the 3rd decoded picture and second decoded picture or first decoded picture and the 4th decoded picture output calibration data.
In addition, the device that produces described correction data also comprises: the device that detects the error of first decoded picture and existing image; Reach device according to the value of the error limitation correction data that is detected.
In addition, the device of generation correction data also comprises: the device that detects the error of first decoded picture and existing image; By sum of errors first decoded picture that will be detected and the second decoded picture addition produce and the 5th decoded picture of the first decoded picture correspondence and with the device of the 6th decoded picture of the second decoded picture correspondence; And the device that uses the 5th decoded picture and the 6th decoded picture output calibration data.
In addition, the device of generation correction data also comprises: the device that detects the error of first decoded picture and existing image; By sum of errors first decoded picture that will be detected or the second decoded picture addition produce and the 5th decoded picture of the first decoded picture correspondence or with the device of the 6th decoded picture of the second decoded picture correspondence; And according to the device of the 5th decoded picture and second decoded picture or first decoded picture and the 6th decoded picture output calibration data.
First kind of liquid crystal display drive circuit also comprises: the frequency band limits device, the existing image of restriction contained fixed frequency content; And will be to the device of the existing picture coding behind the output encoder of frequency band limits device.
First kind of liquid crystal display drive circuit also comprises: the luminance signal of the existing image of output and the device of chrominance signal; And will be to the device of the existing picture coding behind brightness and the chrominance signal coding.
Second kind of liquid crystal display drive circuit of the present invention comprises: the quantization digit of the tone value by making existing image reduces the figure place that makes with the existing image of the frame correspondence of input picture and is kept to still less the device of first image of output and existing image correspondence; Make first picture delay be equivalent to a frame during output second image device; Produce the correction device of the correction data of the tone value of image now according to first image and second image; And according to showing the device that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
The third liquid crystal display drive circuit of the present invention comprises: and the frame correspondence of input picture will show picture coding, the device of first coded image of output and existing image correspondence; Make first coded image postpone to be equivalent to a frame during the device of output second coded image; With the decoding of second coded image, the device of the decoded picture of the input picture correspondence before the frame of output and existing image; Produce the correction device of the correction data of the tone value of image now according to existing image and decoded picture; And according to showing the device that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
In addition, the device that produces correction data is included in the identical situation of first coded image and second coded image and the value of correction data is made as zero device.
The 4th kind of liquid crystal display drive circuit of the present invention comprises: the device of the coded image data output encoder image that will produce for the frame of the input picture before the frame in a series of frame; With the coded image decoding, export the device of first decoded picture; Make coded image postpone to be equivalent to a frame during device; With the coded image decoding after postponing, export the device of second decoded picture; Produce device according to first decoded picture and second decoded picture in order to the correction data of the tone value of adjusting image; And according to showing the device that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
The method of driving liquid crystal of the present invention comprises: the step that produces view data from the tone value of the image that is made of a series of frame; And according to the step of view data to liquid crystal applied voltages.
The method of driving liquid crystal of the present invention comprises: by producing with the existing picture coding of the frame correspondence of image and the step of existing image corresponding codes image; By the coded image decoding being produced and shows the step of first decoded picture of image correspondence; By coded image is postponed be equivalent to a frame during, with the coded image decoding after postponing, produce the step of second decoded picture; Produce the correction step of the correction data of the tone value of image now according to first decoded picture and second decoded picture; And according to showing the step that image and correction data produce described view data.
The tone value that the correction data of this situation will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
Producing correction data also comprises: reduce figure place by quantification with the tone value of first decoded picture and second decoded picture, produce and the 3rd decoded picture of the first decoded picture correspondence and with the step of the 4th decoded picture of the second decoded picture correspondence; Reach step according to the 3rd decoded picture and the 4th decoded picture output calibration data.
Producing correction data also comprises: reduce figure place by quantification with the tone value of first decoded picture or second decoded picture, produce and the 3rd decoded picture of the first decoded picture correspondence or with one the step wherein of the 4th decoded picture of the second decoded picture correspondence; Reach step according to the 3rd decoded picture and second decoded picture or first decoded picture and the 4th decoded picture output calibration data.
Producing correction data also comprises according to the step of first decoded picture with the value of the error limitation correction data of existing image.
Producing correction data also comprises: by first decoded picture and second decoded picture being added the error of first decoded picture and existing image, produce and the 5th decoded picture of the first decoded picture correspondence and with the step of the 6th decoded picture of the second decoded picture correspondence; And the step of use the 5th decoded picture and the 6th decoded picture output calibration data.
In addition, producing correction data also comprises: by first decoded picture or second decoded picture being added the error of first decoded picture and existing image, produce and the 5th decoded picture of the first decoded picture correspondence or with the step of the 6th decoded picture of the second decoded picture correspondence; Reach step according to the 5th decoded picture and second decoded picture or first decoded picture and the 6th decoded picture output calibration data.
In addition, first method also comprise by limit existing image contained fixed frequency content, produce the step of the band limited image of encoding in order to produce coded image.
The method of existing picture coding is also comprised the brightness of existing image and the step of chrominance signal coding.
The second method of driving liquid crystal of the present invention comprises: the quantization digit of the tone value by reducing existing image makes the frame correspondence with input picture that the figure place of existing image is kept to still less, the step of first image of output and existing image correspondence; Make first picture delay be equivalent to a frame during the step of back output second image; Produce the correction step of the correction data of the tone value of image now according to first image and second image; And according to showing the step that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
The third method of driving liquid crystal of the present invention comprises: and the frame correspondence of input picture will show picture coding, the step of first coded image of output and existing image correspondence; Make first coded image postpone to be equivalent to a frame during the step of back output second coded image; With the decoding of second coded image, the step of the decoded picture of the input picture correspondence before the frame of output and existing image; Produce the correction step of the correction data of the tone value of image now according to existing image and decoded picture; And according to showing the step that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmittance values of tone value correspondence of image better in about image duration.
Producing correction data also can be included in first coded image and second coded image and the value of correction data is made as when identical zero step.
The 4th kind of method of driving liquid crystal of the present invention comprises: the step that will produce output encoder image behind the coded image data of frame of the input picture before the frame in a series of frame; With the coded image decoding, export the step of first decoded picture; Make coded image postpone to be equivalent to a frame during, with the coded image decoding after postponing, export the step of second decoded picture; Produce step according to first decoded picture and second decoded picture in order to the correction data of the tone value of adjusting image; And according to showing the step that image and correction data produce view data.
The tone value that the correction data of this situation also will show image is adjusted to that liquid crystal reaches and to show the transmissivity of tone value correspondence of image better in about image duration.
Now the tone value of image is adjusted to that liquid crystal reaches and the transmissivity of the tone value correspondence of the existing image of correct control response speed of liquid crystal is better in about image duration.
The simple declaration of accompanying drawing:
Fig. 1 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 1.
Fig. 2 is the structural map of the liquid crystal display drive circuit of expression embodiment 1.
Fig. 3 is the structural map of the correction data generator of expression embodiment 1.
Fig. 4 is the mode chart of structure of the correction data generation device of expression embodiment 1.
Fig. 5 is the figure of expression response speed of liquid crystal example.
Fig. 6 is the figure of expression response speed of liquid crystal example.
Fig. 7 is the figure of expression correction data example.
Fig. 8 is the figure of expression response speed of liquid crystal example.
Fig. 9 is the figure of expression correction data example.
Figure 10 (a)～10 (c) is the key diagram in order to the action of the liquid crystal display drive circuit of explanation embodiment 1.
Figure 11 (a)～11 (h) is in order to the error of the explanation coding and decoding key diagram to the influence of existing view data.
Figure 12 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 2.
Figure 13 is first figure that constructs of the correction data generator of expression embodiment 2.
Figure 14 is a structural map of representing question blank shown in Figure 13 on pattern.
Figure 15 is a structural map of representing question blank shown in Figure 13 on pattern.
Figure 16 is second figure that constructs of the correction data generator of expression embodiment 2.
Figure 17 is a structural map of representing question blank shown in Figure 16 on pattern.
Figure 18 is a structural map of representing question blank shown in Figure 16 on pattern.
Figure 19 is the 3rd figure that constructs of the correction data generator of expression embodiment 2.
Figure 20 is a structural map of representing question blank shown in Figure 19 on pattern.
Figure 21 is a structural map of representing question blank shown in Figure 19 on pattern.
Figure 22 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 3.
Figure 23 is first figure that constructs of the correction data generator of expression embodiment 3.
Figure 24 is a structural map of representing question blank shown in Figure 23 on pattern.
Figure 25 is the key diagram in order to the computing method of explanation correction data.
Figure 26 is second figure that constructs of the correction data generator of expression embodiment 3.
Figure 27 is a structural map of representing question blank shown in Figure 26 on pattern.
Figure 28 is the key diagram in order to the computing method of explanation correction data.
Figure 29 is the 3rd figure that constructs of the correction data generator of expression embodiment 3.
Figure 30 is a structural map of representing question blank shown in Figure 29 on pattern.
Figure 31 is the key diagram in order to the computing method of explanation correction data.
Figure 32 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 4.
Figure 33 is the structural map of the liquid crystal display drive circuit of expression embodiment 4.
Figure 34 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 5.
Figure 35 is the structural map of the liquid crystal display drive circuit of expression embodiment 5.
Figure 36 is first figure that constructs of the correction data generator of expression embodiment 5.
Figure 37 is other structural map of expression correction data generator shown in Figure 36.
Figure 38 is other structural map of expression correction data generator shown in Figure 36.
Figure 39 is other structural map of expression correction data generator shown in Figure 36.
Figure 40 is second figure that constructs of the correction data generator of expression embodiment 5.
Figure 41 is other structural map of expression correction data generator shown in Figure 40.
Figure 42 is other structural map of expression correction data generator shown in Figure 40.
Figure 43 is other structural map of expression correction data generator shown in Figure 40.
Figure 44 is other structural map of expression correction data generator shown in Figure 40.
Figure 45 is the 3rd figure that constructs of the correction data generator of expression embodiment 5.
Figure 46 is other structural map of expression correction data generator shown in Figure 45.
Figure 47 is other structural map of expression correction data generator shown in Figure 45.
Figure 48 is other structural map of expression correction data generator shown in Figure 45.
Figure 49 is the structural map of the liquid crystal display drive circuit of expression embodiment 6.
Figure 50 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 7.
Figure 51 is the structural map of the liquid crystal display drive circuit of expression embodiment 7.
Figure 52 is first figure that constructs of the correction data generator of expression embodiment 7.
Figure 53 is other structural map of correction data generator shown in expression Figure 52.
Figure 54 is other structural map of correction data generator shown in expression Figure 52.
Figure 55 is other structural map of correction data generator shown in expression Figure 52.
Figure 56 is second figure that constructs of the correction data generator of expression embodiment 7.
Figure 57 is the 3rd figure that constructs of the correction data generator of expression embodiment 7.
Figure 58 is the 4th figure that constructs of the correction data generator of expression embodiment 7.
Figure 59 is the process flow diagram of the action of expression embodiment 8 liquid crystal display drive circuits.
Figure 60 is the structural map of the liquid crystal display drive circuit of expression embodiment 8.
Figure 61 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 9.
Figure 62 is the structural map of the liquid crystal display drive circuit of expression embodiment 9.
Figure 63 is the process flow diagram of action of the liquid crystal display drive circuit of expression embodiment 10.
Figure 64 is the structural map of the liquid crystal display drive circuit of expression embodiment 10.
Figure 65 is other structural map of the liquid crystal display drive circuit of expression embodiment 10.
Figure 66 is first figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.
Figure 67 (a)～(c) is the key diagram in order to the action of the liquid crystal display drive circuit of explanation embodiment 11.
Figure 68 is second figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.
Figure 69 is the 3rd figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.
Figure 70 is the 4th figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.
Figure 71 is the 5th figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.
Figure 72 is a structural map of representing liquid crystal display drive circuit in the past.
Figure 73 is the key diagram of handling in order to the extraction of explanation video memory.
Figure 74 (a)～74 (d) is the key diagram that extracts the problem points of handling in order to explanation.
The embodiment of invention
Following reference has the figure that the key element of identical functions represents with identical reference marks embodiments of the invention is described.
Fig. 2 is the structural map of the liquid crystal display drive circuit of expression embodiment 1.Receiving trap 2 receives picture signal by input terminal 1, successively the existing view data Di1 of the image of a frame of output expression (hereinafter referred to as existing image).View data handling part 3 is made of code device 4, deferred mount 5, decoding device 6,7, correction data generator 8 and means for correcting 9, the new view data Di1 of generation and existing view data Di1 correspondence.Display device 10 utilizes general display panels to constitute, and carries out display action by the voltage that liquid crystal is applied with the tone value correspondence of image.
Decoding device 6 is by decoding encoded data D a1 the decode image data Db1 of the existing image correspondence that the existing view data Di1 of output and utilization represents.Simultaneously, the encoded data D a0 decoding of decoding device 7 by deferred mount 5 is postponed, the decode image data Db0 of the image correspondence before the frame of output and existing image.
Means for correcting 9 is by with correction data Dc and existing view data Di1 addition (or multiplying each other), produces and the new view data Dj1 of view data Di1 correspondence.Display device 10 by according to view data Dj1 to liquid crystal apply fixed voltage carry out display action.
Fig. 1 is the process flow diagram of the action of expression liquid crystal display drive circuit shown in Figure 2.
At coded image data step (St1), utilize code device 4 will show view data Di1 coding, outputting encoded data Da1.Postpone step (St2) in coded data, utilize deferred mount 5 with encoded data D a1 postpone to be equivalent to a frame during after, output will show the encoded data D a0 behind the coded image data before the frame of view data Di1.At image data decoding step (St3), utilize decoding device 6,7 with encoded data D a1, Da0 decoding, output decoder view data Db1, Db0.Produce step (St4) in correction data, utilize correction data generator 8 according to decode image data Db1, Db0 output calibration data Dc.At view data aligning step (St5), utilize the new view data Dj1 of means for correcting 9 according to correction data Dc output and existing view data Di1 correspondence.More than, the action of each step of St1～St5 is carried out at each frame for existing view data Di1.
Fig. 3 is the figure of the internal structure example of expression correction data generator 8.Question blank (LUT) 11 stores the data Dc1 of expression according to each value of the correction data Dc of decode image data Db1, Db0 decision, and the output Dc1 of question blank 11 is as correction data Dc.
Fig. 4 is the figure of the structure of expression question blank 11 on pattern.At this, the view data of decode image data Db1, Db0 each 8 naturally (256 tones), value 0～255.As shown in Figure 4, question blank 11 has 256 * 256 data of the two dimension of being arranged in, and the correction data Dc1=dt of the two value correspondences of output and decode image data Db1, Db0 (Db1, Db0).
Below describe correction data Dc in detail.When if the tone of existing image is 8 (0～255 tone), the situation at existing view data Di1=127 applies transmissivity to liquid crystal and becomes 50% voltage V50.Equally, the situation at existing view data Di1=191 applies transmissivity to liquid crystal and becomes 75% voltage V75.Fig. 5 is expression has applied the situation of described voltage V50, V75 to the liquid crystal of transmissivity 0% response speed figure.As shown in Figure 5, liquid crystal arrive fixed transmissivity need be longer than an image duration response time.Thereby, situation about changing at the tone value of existing image, the transmissivity when applying through an image duration becomes the voltage of desired transmissivity, and response speed of liquid crystal is improved.
As shown in Figure 5, in the situation that has applied voltage V75, the transmissivity during through an image duration becomes 50%.Thereby, be 50% situation in the object penetrating rate, be made as V75 by voltage with liquid crystal, can in an image duration, liquid crystal be made as desired transmissivity.That is, fade to 127 situation from 0, after will described existing view data being made as Di1=191, export, liquid crystal is applied to the voltage that becomes desired transmissivity in the image duration to display device 10 at existing view data Di1.
Fig. 6 is the figure of expression response speed of liquid crystal example, the x axle is the value (at the tone value of existing image) of existing view data Di1, the y axle is the value (tone value of the image before a frame) of the view data Dj0 before the frame, the z axle represent liquid crystal from a frame before the transmissivity of tone value correspondence become and show the required response time till the transmissivity of tone value correspondence of view data Di1.At this, be 8 situation at the tone value of existing image, the combination that reaches the tone value of the image before a frame because of existing image has 256 * 256 kinds, and response speed also has 256 * 256 kinds.To become 8 * 8 kinds with the combination corresponding response speed reduced representation of tone value at Fig. 6.
Fig. 7 represents to become through an image duration time and the show that shows the value correspondence of view data Di1 is penetrated rate and the value of correction data Dc that existing view data Di1 is added for liquid crystal.At the tone value of existing image is 8 situation, the combination correspondence of the tone value of correction data Dc and existing image and the image before a frame have 256 * 256 kinds.To become 8 * 8 kinds with the combination corresponding response speed reduced representation of tone value at Fig. 7.
As shown in Figure 6, response speed of liquid crystal is because of different at each tone value of existing image and the image before a frame, because of utilizing simple calculating formula to ask the value of correction data Dc, in 256 * 256 kinds of correction datas that question blank 11 stores and now image reaches the dichromatism tone pitch correspondence of the image before a frame.
Fig. 8 is the not figure of example of expression response speed of liquid crystal.Fig. 9 represents to become through an image duration time and show the transmissivity of value correspondence of view data Di1 and the value of correction data Dc that existing view data Di1 is added for the liquid crystal with response characteristic shown in Figure 8.Shown in Fig. 6,8, because of the response characteristic of liquid crystal becomes because of the material of liquid crystal, electrode shape, temperature etc., comprise question blank 11 with the correction data Dc of this service condition correspondence by use, can be according to the Characteristics Control response speed of liquid crystal.
Correction data Dc=dt (Db1, Db0) is set as for the correction quantitative change of the combination of the slow tone value of response speed of liquid crystal big.The liquid crystal especially response speed when medium tone (grey) becomes high tone (white) is slow.Therefore, by will and representing that the value of the correction data dt (Db1, Db0) of the decode image data Db1 correspondence of high tone is made as big value, response speed is improved with the decode image data Db0 that represents medium tone.
The data Dc1 that correction data generator 8 is exported question blank 11 exports as correction data Dc.Means for correcting 9 passes through correction data Dc and existing view data Di1 addition, the new view data Dj1 of output and existing image correspondence.Display device 10 is carried out display action by the voltage that applies to liquid crystal with view data Dj1 correspondence.
Figure 10 is the key diagram in order to the action of the liquid crystal display drive circuit of explanation present embodiment.At Figure 10, the existing view data Di1 of Figure 10 (a) expression, the value of the view data Dj1 after Figure 10 (b) expression is proofreaied and correct according to correction data Dc, the response characteristic of liquid crystal when Figure 10 (c) expression has applied according to the voltage of view data Dj1.At Figure 10 (c), the characteristic of utilizing dotted line to represent is the response characteristic that has applied liquid crystal when basis shows view data Di1.Shown in Figure 10 (b), increase situation about reducing at tone value, by subtracting each other, produce the view data Dj1 of the new image of expression and existing image correspondence according to corrected value V1, V2 and the existing view data Di1 addition of correction data Dc.In display device 10, by liquid crystal being applied voltage according to view data Dj1, shown in Figure 10 (c), can be in about image duration with liquid crystal drive become to become fixed transmissivity.
The liquid crystal display drive circuit of present embodiment utilizes code device 4 will show behind the view data Di1 coding the data capacity compression and postpones when producing correction data Dc, can reduce to show the capacity that view data Di1 postpones required storer image duration.In addition, because of the coding and decoding of the Pixel Information that do not extract existing view data Di1, produce the correction data Dc of appropriate value, control response speed of liquid crystal that can be correct.
In addition, because of producing correction data Dc according to the decode image data Db1, the Db0 that utilize code device 4 and decoding device 6,7 coded decodings, view data Dj1 is as the error effect of not decoded shown in following.
Figure 11 is that error in order to the explanation coding and decoding is to the key diagram of the influence of view data Dj1.
Figure 11 (d), Figure 11 (a) are respectively the figure of value of the view data Di0 of the image before the frame of the existing view data Di1 of the existing image of expression on pattern, existing image.Shown in Figure 11 (d), (a), existing view data Di1 and constant before a frame.
Figure 11 (b), Figure 11 (e) are respectively the figure of the view data Di0 corresponding codes data of the image before the existing view data Di1 shown in expression and Figure 11 (d), (a) and the frame on pattern.At this, the coded data that Figure 11 (b), (e) expression utilize the FTBC coding to obtain, (La Lb) is made as 8, and each pixel is distributed 1 with typical value.Figure 11 (c), (f) represent the decoded decode image data Db0 of coded data, the Db1 shown in Figure 11 (e), (b).Figure 11 (g) expression is according to the value of the correction data Dc of decode image data Db0, Db1 shown in Figure 11 (c), (f) generation, and Figure 11 (h) expression is at this moment from the value of means for correcting 9 to the view data Dj1 of display device 10 outputs.
Shown in Figure 11 (d), (f), situation in the coding and decoding generation error of following existing view data Di1, also pass through the value according to the correction data Dc of decode image data Db0, Db1 shown in Figure 11 (c), (f) generation, shown in Figure 11 (g), the value of correction data Dc becomes 0.Thereby shown in Figure 11 (h), the error effect ground that is not subjected to take place because of coding and decoding is to display device 10 output image data Dj1.
In the above description, the data that are illustrated in question blank 11 input are situations of 8, but limit so, so long as utilize interpolation processing etc. can produce the figure place of correction data in fact, can be made as figure place arbitrarily.
In addition, the value of correction data Dc is made as and shows the multiplication value that view data Di1 multiplies each other and also can.In this situation, it is the coefficient of the variation of the multiplying power at center and correcting value correspondence that correction data Dc is expressed as with 1.0 times.In this situation, means for correcting 9 is at the textural multiplier that comprises.In addition, correction data Dc is set as the scope that view data Dj1 is no more than display device 10 displayable tones.
Figure 13 is first figure that constructs of the correction data generator 8 of expression embodiment 2.Data converting apparatus 12 is for example undertaken from 8 figure place conversion that are reduced to 3 by the quantization digit with decode image data Db1, the new decode image data De1 of output and decode image data Db1 correspondence.Decode image data De1 and the decode image data Db0 output calibration data Dc1 of question blank 13 after according to the figure place conversion.
Figure 12 is the process flow diagram of the action of the expression liquid crystal display drive circuit with correction data generator 8 shown in Figure 13.At coded data converting step (St6), utilize data converter 12 to reduce the quantization digit of decode image data Db1.Produce step (St4) in next correction data, according to the decode image data De1 and the decode image data Db0 output calibration data Dc1 that utilize after the question blank 13 figure place conversion.The action of other each steps with illustrated the same of embodiment 1.
Figure 14 is a structural map of representing question blank 13 shown in Figure 13 on pattern.At this, the decode image data De1 after the figure place conversion is 3 (8 tone) data, value 0～7.As shown in figure 14, question blank 13 has 256 * 8 data of the two dimension of being arranged in, and the correction data Dc1=dt corresponding according to two values of 3 decode image data De1 and 8 s' decode image data Db0 output and De1, Db0 (De1, Db0).
Utilize the transform method of the quantization digit of data converting apparatus 12 to use equal interval quantizing or make any of the nonlinear quantization that changes of the quantization resolution of fixed tone value all can.
Figure 15 is that expression utilizes the structural map of nonlinear quantization with the question blank 13 of the situation of decode image data De1 figure place conversion on pattern.In this situation, data converting apparatus 12 with the tone value of decode image data Db1 and with a plurality of threshold values of conversion figure place corresponding preset relatively after, export after immediate threshold values is made as decode image data De1.At Figure 15, the interval correspondence of the interval of each correction data Dc of Pai Lieing and a plurality of threshold values in the horizontal direction.
So, when utilizing nonlinear quantization,, can reduce the error that figure place reduces the correction data Dc that is followed by quantization resolution being made as height in the big zone of the variation of correcting value with the figure place conversion.
Figure 16 is second figure that constructs of the correction data generator 8 of expression present embodiment.Data converting apparatus 14 is for example undertaken from 8 figure place conversion process that are reduced to 3 by the quantization digit with decode image data Db0, the new decode image data De0 of output and decode image data Db0 correspondence.Decode image data De0 and the decode image data Db1 output calibration data Dc1 of question blank 15 after according to the figure place conversion.
Figure 17 is a structural map of representing question blank 15 shown in Figure 16 on pattern.At this, the decode image data De0 after the figure place conversion is 3 (8 tone) data, value 0～7.As shown in figure 17, question blank 15 has 8 * 256 data of the two dimension of being arranged in, and the correction data Dc1=dt corresponding according to two values of 3 decode image data De0 and 8 s' decode image data Db1 output and Db1, De0 (Db1, De0).
Utilize the transform method of the quantization digit of data converting apparatus 14 to use equal interval quantizing or make any of the nonlinear quantization that changes of the quantization resolution of fixed tone value all can.
Figure 18 is that expression utilizes the structural map of nonlinear quantization with the question blank 15 of the situation of decode image data De0 figure place conversion on pattern.
Figure 19 is the 3rd figure that constructs of the correction data generator 8 of expression present embodiment. Data converting apparatus 12,14 is for example undertaken from 8 figure place conversion process that are reduced to 3 by the quantization digit with decode image data Db1, Db0, new decode image data De1, the De0 of output and decode image data Db1, Db0 correspondence.Decode image data De1, the De0 output calibration data Dc1 of question blank 16 after according to the figure place conversion.
Figure 20 is a structural map of representing question blank 16 shown in Figure 19 on pattern.At this, the decode image data De1 after the figure place conversion, De0 are 3 (8 tone) data, value 0～7.As shown in figure 20, question blank 16 has 8 * 8 data of the two dimension of being arranged in, and the correction data Dc1=dt corresponding according to two values of 3 decode image data De1, De0 output and De1, De0 (De1, De0).
Utilize the transform method of the quantization digit of data converting apparatus 12,14 to use equal interval quantizing or make any of the nonlinear quantization that changes of the quantization resolution of fixed tone value all can.
Figure 21 is that expression utilizes the structural map of nonlinear quantization with the question blank 16 of the situation of decode image data De1, the conversion of De0 figure place on pattern.
As described above,, reduce the data volume of question blank 13,15,16, can simplify the structure of correction data generator 8 by reducing the quantization digit of decode image data Db1 and/or decode image data Db0.
In addition, in the above description, at data converting apparatus 12,14, expression is the situation of quantization digit from 8 bit maps to 3, but limits so, so long as utilize interpolation processing etc. can produce the figure place of correction data in fact, can be made as figure place arbitrarily.
Figure 23 is first figure that constructs of the correction data generator of expression embodiment 3.Data converting apparatus 17 is decode image data Db 1 equal interval quantizing, with quantization digit for example after 8 bit maps to 3, the decode image data De1 after the carry-out bit transformation of variables.Simultaneously, data converting apparatus 17 calculates interpolation coefficient k1 described later.The decode image data De1 of question blank 18 after and decode image data Db0 output 2 inner correction data Df1, Df2 of 8 according to the figure place conversion.Correction data interpolating apparatus 19 produces correction data Dc1 according to 2 inner correction data Df1, Df2 and interpolation coefficient k1.
Figure 22 is the process flow diagram of action of the liquid crystal display drive circuit of the expression present embodiment with correction data generator 8 shown in Figure 23.At coded data converting step (St6), utilize data converting apparatus 17 to reduce the figure place conversion of the quantization digit of decode image data Db1, and export interpolation coefficient k1.Produce step (St4) in correction data, according to decode image data De1 and decode image data Db0 output 2 inner correction data Df1, Df2 of utilizing after the question blank 18 figure place conversion.At correction data interpolation procedure (St7), utilize correction data interpolating apparatus 19 to produce correction data Dc1 according to 2 inner correction data Df1, Df2 and interpolation coefficient k1.The action of other each steps with illustrated the same of embodiment 1.
Figure 24 is the structural map of expression question blank 18 on pattern.At this, the decode image data De1 after the figure place conversion is 3 (8 tone) data, value 0～7.Shown in Fig. 24, question blank 18 has 256 * 9 data of the two dimension of being arranged in, will with the corresponding correction data Dc1=dt (De1 of two values of 3 decode image data De1 and 8 s' decode image data Db0, Db0) export after being made as inner correction data Df1, (De1+1 Db0) exports after being made as inner correction data Df2 dt that will be adjacent with inner correction data Df1.
Data converting apparatus 19 uses 2 inner correction data Df1, Df2 and interpolation coefficient k1, utilizes following formula (1) compute correction data Dc1.
Dc1＝(1-k1)×Df1+k1×Df2 (1)
Figure 25 is the key diagram that is used to illustrate the computing method of correction data DC1.
Figure 25, s1, s2 are the threshold values that uses when utilizing the figure place of data converting apparatus 17 conversion decode image data Db1.S1 be with the figure place conversion after the threshold values of decode image data De1 correspondence, s2 is and threshold values than the decode image data De1+1 correspondence of the big tone of the decode image data De1 after the figure place conversion.
At this moment, interpolation coefficient k1 utilizes following formula (2) to calculate.
K1＝(Db1-s1)/(s2-s1)(2)
Wherein, s1＜Db1≤s2
Utilize correction data Dc1 that interpolation arithmetic calculates as shown in Figure 2, as correction data Dc from correction data generator 8 to means for correcting 9 outputs.Means for correcting 9 is proofreaied and correct existing view data Di1 according to correction data Dc, the view data Dj1 after display device 10 transmits correction.
As noted above, calculate and decode image data (De1 by using at the interpolation coefficient k1 that the figure place conversion clock of decode image data Db1 is calculated, Db0) reach (De1+1, Db0) interpolation of Dui Ying 2 inner correction data Df1, Df2, ask correction data Dc1, can reduce of the influence of the quantization error of decode image data De1 correction data Dc.
Figure 26 is second figure that constructs of the correction data generator 8 of expression present embodiment 3.Data converting apparatus 20 is decode image data Db0 equal interval quantizing, with quantization digit for example after 8 bit maps to 3, the decode image data De0 after the carry-out bit transformation of variables.Simultaneously, data converting apparatus 20 calculates interpolation coefficient k0 described later.3 the decode image data De0 of question blank 21 after and decode image data Db1 output 2 inner correction data Df3, Df4 of 8 according to the figure place conversion.Correction data interpolating apparatus 22 produces correction data Dc1 according to 2 inner correction data Df3, Df4 and interpolation coefficient k0.
Figure 27 is the structural map of expression question blank 21 on pattern.At this, the decode image data De0 after the figure place conversion is 3 (8 tone) data, value 0～7.As shown in figure 27, question blank 21 has 256 * 9 data of the two dimension of being arranged in, will with the corresponding correction data dt (Db1 of two values of 8 decode image data Db1 and 3 s' decode image data De0, De0) export after being made as corrected value Df3, (Db1 De0+1) exports after being made as corrected value Df4 correction data dt that will be adjacent with corrected value Df3.
Correction data interpolating apparatus 22 uses correction data Df3, Df4 and interpolation coefficient k0, utilizes following formula (3) compute correction data Dc1.
Dc1＝(1-k0)×Df3+k0×Df4 (3)
Figure 28 is the key diagram of computing method that utilizes the correction data Dc1 of aforesaid way (3) expression in order to explanation.At Figure 28, s3, s4 are the threshold values that uses when utilizing the quantization digit of data converting apparatus 20 conversion decode image data Db0.S3 be with the figure place conversion after the threshold values of decode image data De0 correspondence, s4 is and threshold values than the decode image data De0+1 correspondence of the big tone of the decode image data De0 after the figure place conversion.
At this moment, interpolation coefficient k0 utilizes following formula (4) to calculate.
K0＝(Db0-s3)/(s4-s3) (4)
Wherein, s3＜Db0≤s4
Utilize the correction data Dc1 that interpolation arithmetic calculated shown in above-mentioned formula (3) to export to means for correcting 9 from correction data generator 8 as correction data Dc.After means for correcting 9 is proofreaied and correct existing view data Di1 according to correction data Dc, the view data Dj1 after display device 10 transmits correction.
As noted above, calculate and decode image data (Db1 by using at the interpolation coefficient k0 that the figure place conversion clock of decode image data Db0 is calculated, De0) reach (Db1, De0+1) interpolation of Dui Ying 2 inner correction data Df3, Df4, ask correction data Dc1, can reduce of the influence of the quantization error of decode image data De0 correction data Dc.
Figure 29 is the 3rd figure that constructs of the correction data generator 8 of expression present embodiment 3. Data converting apparatus 17,20 is separately with decode image data Db1, Db0 equal interval quantizing, with quantization digit for example after 8 bit maps to 3, output decoder view data De1, De0.Simultaneously, data converting apparatus 17,20 calculates interpolation coefficient k0, k1 separately.Question blank 23 is according to 3 decode image data De1, De0 output calibration value Df1～Df4.Correction data interpolating apparatus 24 produces correction data Dc1 according to proofreading and correct Df1～Df4 and interpolation coefficient k0, k1.
Figure 30 is the structural map of expression question blank 23 on pattern.At this, the decode image data De1 after the figure place conversion, De0 are 3 (8 tone) data, value 0～7.As shown in figure 30, question blank 23 has 9 * 9 data of the two dimension of being arranged in, will with the corresponding correction data dt (De1 of two values of 3 decode image data De1, De0, De0) export after being made as corrected value Df1,3 correction data dt (De1+1 that will be adjacent with corrected value Df1, De0), dt (De1, De0+1), (De1+1 De0+1) exports after being made as corrected value Df2, Df3, Df4 separately dt.
Correction data interpolating apparatus 24 uses correction data Df1～Df4 and interpolation coefficient k1, k0, utilizes following formula (5) compute correction data Dc1.
Dc1＝(1-k0)×{(1-k1)×Df1+k1×Df2}+k0×{(1-k1)×Df3+k1×Df4}(5)
Figure 31 is the key diagram of computing method that utilizes the correction data Dc1 of above-mentioned formula (5) expression in order to explanation.At Figure 31, s1, s2 are the threshold values that uses when utilizing the quantization digit of data converting apparatus 17 conversion decode image data Db1.S3, s4 are the threshold values that uses when utilizing the quantization digit of data converting apparatus 20 conversion decode image data Db0.S1 be with the figure place conversion after the threshold values of decode image data De1 correspondence, s2 is and threshold values than the decode image data De1+1 correspondence of the big tone of the decode image data De1 after the figure place conversion.In addition, s3 be with the figure place conversion after the threshold values of decode image data De0 correspondence, s4 is and threshold values than the decode image data De0+1 correspondence of the big tone of the decode image data De0 after the figure place conversion.
At this moment, interpolation coefficient k1, k0 utilize following formula (6), (7) to calculate separately.
k1＝(Db1-s1)/(s2-s1) (6)
Wherein, s1＜Db1≤s2
k0＝(Db0-s3)/(s4-s3) (7)
Wherein, s3＜Db0≤s4
The correction data Dc1 that interpolation arithmetic calculated of utilization shown in above-mentioned formula (5) exports to means for correcting 9 from correction data generator 8 as correction data Dc as shown in Figure 2.After means for correcting 9 is proofreaied and correct existing view data Di1 according to correction data Dc, the view data Dj1 after display device 10 transmits correction.
As noted above, by use interpolation coefficient k0, k1 that the figure place conversion clock of decode image data Db0, Db1 is calculated calculate and decode image data (De1, De0), (De1+1, De0), (De1, De0+1) and
(De1+1, De0+1) interpolation of Dui Ying 4 corrected value Df1～Df4 is asked correction data Dc1, can reduce the influence of the quantization error of decode image data De0, De1 to correction data Dc.
In addition, correction data interpolating apparatus 19,22,24 uses the structure of the interpolation arithmetic compute correction data Dc1 of the function that adopts high order also can except linear interpolation.
Figure 33 is the structural map of the liquid crystal display drive circuit of expression embodiment 4.View data handling part 25 at present embodiment is made of data converting apparatus 26, deferred mount 5, correction data generator 8 and means for correcting 9.The quantization digit of data converting apparatus 26 by will showing view data Di1 for example reduces data capacity from 8 bit maps to 3.Any of quantization transformation of variable use equal interval quantizing or nonlinear quantization all can.View data Da1 after 8 outputs of deferred mount 5 and correction data generator utilize data converting apparatus 26 figure place conversion.Deferred mount 5 by the view data Da1 after the figure place conversion is postponed be equivalent to a frame during, the view data Da0 of the image correspondence before the frame of output and existing image.
The view data Da0 output calibration data Dc of correction data generator 8 before according to view data Da1 and frame.After means for correcting 9 is proofreaied and correct existing view data Di1 according to correction data Dc, the view data Dj1 behind display device 10 output calibrations.
In the quantization transformation of variable, any that uses equal interval quantizing or nonlinear quantization all can, utilize the quantization digit of the view data Da1 of data converting apparatus 26 figure place conversion be made as 3 beyond also can, welcome setting.The quantization digit of view data Da1 is made as fewer, in deferred mount 5 usefulness so that view data Da1 postpones the capacity of required storer image duration more lacks.
In addition, the correction data of the figure place correspondence of 8 maintenances of correction data generator and view data Da1, Da0.
Figure 32 is the process flow diagram of action of the liquid crystal display drive circuit of expression present embodiment.
At view data shift step (St8), utilize data converting apparatus 26 to reduce the figure place conversion of quantization digit of existing view data Di1 after, the new view data Da1 of output and existing view data Di1 correspondence.Postpone step (St2) in next view data, utilize deferred mount 5 with view data Da1 postpone to be equivalent to a frame during.Produce step (St4) in correction data, utilize correction data generator 8 according to view data Da1, Da0 output calibration data Dc.At view data aligning step (St5), utilize means for correcting 9 to produce view data Dj1 according to correction data Dc.
As shown above,, because of quantization digit packed data capacity, omit decoding device, and simplify the structure of correction data generator 8, can dwindle circuit scale by the existing view data Di1 of conversion at present embodiment 4.
Figure 35 is the structural map of the liquid crystal display drive circuit of expression embodiment 5.At the view data handling part 27 of present embodiment, after correction data generator 28 detects the error of existing view data Di1 and decode image data Db1, according to the correcting value of the error limitation correction data Dc that is detected.Other action is the same with the action of embodiment 1.
Figure 36 is first figure that constructs of the correction data generator 28 of expression present embodiment.Question blank 11 is according to decode image data Db1, Db0 output calibration data Dc1.Error measuring means 29 detects because of handle the error in decode image data Db1 generation at the coding and decoding of code device 4 and decoding device 6 by relatively showing view data Di1 and decode image data Db1.Error measuring means 29 has surpassed the situation of institute's definite value in the difference of existing view data Di1 and decode image data Db1, to the correcting value restricting signal j1 of restraint device 30 outputs in order to the correcting value of restriction correction data Dc.
Figure 34 is the process flow diagram of action of the liquid crystal display drive circuit of expression present embodiment shown in Figure 35.The step of utilization till St1～St4 and the action generation correction data Dc1 the same with embodiment 1.Then, at error determination step (St9), utilize the error of existing view data Di1 of 29 pairs of each pixel detection of error measuring means and decode image data Db1.At correction data conditioning step (St10), surpassed the situation of institute's definite value in the error of utilizing error measuring means 29 to be detected, utilize the value of restraint device 30 restriction correction data Dc1 after, export new correction data Dc2.View data aligning step (St5) utilizes means for correcting 9 according to correction data Dc2 image correcting data Dj1.
As noted above, the big situation of error at existing view data Di1 and decode image data Db1 diminishes by the value that is controlled to correction data Dc, and control response speed of liquid crystal that can be correct prevents the deterioration of the unnecessary caused display image of correction.
Figure 37 is other structural map of expression correction data generator 28 shown in Figure 36.As shown in figure 37, the data converting apparatus 12 of the figure place of conversion decode image data Db1 is set, also can according to the decode image data De1 output calibration data Dc1 after the figure place conversion textural.
In addition, correction data generator 28 is provided with the data converting apparatus 12,14 of the figure place of conversion decode image data Db1, Db0 as shown in figure 39, also can according to the decode image data De1 after the figure place conversion, De0 output calibration data Dc1 textural.
At this, about action of each structure of data converting apparatus 12,14 and question blank 13,15,16 with illustrated the same of embodiment 2.If according to the structure shown in Figure 37～39, can reduce the data capacity of question blank 13,15,16, dwindle circuit scale.
Figure 40 is second figure that constructs of the correction data generator 28 of expression present embodiment.After the error of existing view data Di1 of 31 pairs of each pixel detection of error measuring means and decode image data Db1, export after the error that is detected is made as correction signal j2.Data correction apparatus 32 according to correction signal j2 each data of utilizing error measuring means 31 output to each pixel correction decode image data Db0, Db1 after, decode image data Dg1, Dg0 behind question blank 11 output calibrations.
At this, decode image data Db0, Db1 and proofread and correct according to correction signal j2 after the relation of decode image data Dg0, Dg1 utilize following formula (8)～(10) expression.
Dg1＝Db1+j2 (8)
Dg0＝Db1+j2 (9)
j2＝Di1-Db1 (10)
As shown in above-mentioned formula (8), (9), by each data to decode image data Db1, Db0 add correction signal j2 (=Di1-Db1), can offset and follow coding and decoding to handle the error percentage j2 that takes place at decode image data Db1, Db0.
Question blank 11 is according to decode image data Dg1, Dg0 output calibration data Dc1 after proofreading and correct.Correction data generator 28 is made as behind the correction data Dc correction data Dc1 that utilizes question blank 11 output to means for correcting 9 outputs as shown in figure 35.
As shown above, add that by each data to decode image data Db1, Db0 existing view data Di1 and decoded picture money are the error j2 of Db1, recoverable is handled the error that takes place at decode image data Db1, Db0 because of coding and decoding.Thereby control response speed of liquid crystal that can be correct prevents the deterioration of the unnecessary caused display image of correction.
In addition, the decode image data Dg1 after the correction is as equating with existing view data Di1 shown in the following formula (11).
Dg1＝Db1+Di1-Db1＝Di1 (11)
Therefore, as shown in figure 41, the decode image data Dg1 after textural alternative corrective will show view data Di1 input inquiry table 11 and also can.
Figure 42 is other structural map of expression correction data generator 28 shown in Figure 40.As shown in figure 42,, by being set, the data converting apparatus 12 of the figure place that reduces the decode image data Dg1 that utilizes data correction apparatus 32 outputs also can textural according to the decode image data De1 output calibration data Dc1 after the figure place conversion.
In addition, correction data generator 28 as shown in figure 44,, by being set, the data converting apparatus 12,14 of the figure place that reduces the decode image data Dg1, the Dg0 that utilize data correction apparatus 32 outputs also can textural according to the decode image data De1 after the figure place conversion, De0 output calibration data Dc1.
More than, if according to the structure shown in Figure 42～44, can reduce the data capacity of question blank 13,15,16, dwindle circuit scale.
Figure 45 is the 3rd figure that constructs of the correction data generator of expression embodiment 5.Error measuring means 29 has surpassed the situation of institute's definite value in the error of existing view data Di1 and decode image data Db1, to the correcting value restricting signal j1 of restraint device 30 outputs in order to the correcting value of restriction correction data Dc1.In addition, after the error of existing view data Di1 of 31 pairs of each pixel detection of error measuring means and decode image data Db1, the error that is detected is made as behind the correction signal j2 to data correction apparatus 32 outputs.
As shown above, by error correction decode image data Dg1, Dg0 and correction data Dc1 according to existing view data Di1 and decode image data Db1, in the big situation of error of handling the decode image data Db1, the Db0 that take place because of coding and decoding, control response speed of liquid crystal that also can be correct prevents the deterioration of the unnecessary caused display image of correction.
Figure 46 is other structural map of expression correction data generator 28 shown in Figure 45.As shown in figure 46,, by being set, the data converting apparatus 12 of the figure place that reduces the decode image data Dg1 that utilizes data correction apparatus 32 outputs also can textural according to the decode image data De1 output calibration data Dc1 after the figure place conversion.
In addition, correction data generator 28 as shown in figure 48,, by being set, the data converting apparatus 12,14 of the figure place separately that reduces the decode image data Dg1, the Dg0 that utilize data correction apparatus 32 outputs also can textural according to the decode image data De1 after the figure place conversion, De0 output calibration data Dc0.
More than, as if structure, can reduce the data capacity of question blank 13,15,16 according to the correction data generator 28 shown in Figure 46～48, dwindle circuit scale.
Figure 49 is the structural map of the liquid crystal display drive circuit of expression present embodiment 6.The view data handling part 34 of present embodiment is made of code device 4, deferred mount 5, decoding device 7, correction data generator 35 and means for correcting 9.Code device 4 will show view data Di1 coding back outputting encoded data Da1.Deferred mount 5 with encoded data D a1 postpone to be equivalent to a frame during encoded data D a0 after the output delay of back.At this, utilize the view data correspondence before the frame of encoded data D a0 after deferred mount 5 postpones and encoded data D a1.Decoding device 7 is with encoded data D a0 decoding, output decoder view data Db0.Correction data generator 35 is according to after now view data Di1 and decode image data Db0 produce correction data Dc, to means for correcting 9 outputs.
As shown in figure 49, by producing correction data Dc according to existing view data Di1 and decode image data Db0 at the textural correction data generator 35 that utilizes, omission in order to will with the decoding device 6 of existing view data Di1 corresponding codes data Da1 decoding, can dwindle circuit scale.
Figure 51 is the structural map of the liquid crystal display drive circuit of expression present embodiment 7.The view data handling part 36 of present embodiment is made of code device 4, deferred mount 5, decoding device 7, correction data generator 37 and means for correcting 9.Editing device 4 will show view data Di1 coding, to deferred mount 5 and correction data generator 37 outputting encoded data Da1.Deferred mount 5 with encoded data D a1 postpone to be equivalent to a frame during after, the encoded data D a0 after decoding device 7 and 37 output delaies of correction data generator.At this, utilize the view data correspondence before the frame of encoded data D a0 after deferred mount 5 postpones and encoded data D a1.Decoding device 7 is with encoded data D a0 decoding, to correction data generator 37 output decoder view data Db0.
Figure 52 is the figure of first structure of expression correction data generator 37.Question blank 11 is according to existing view data Di1 and decode image data Db0 output calibration data Dc1.Comparison means 38 is relatively behind encoded data D a0, the Da1,, exports value with correction data Dc1 to restraint device 39 and is made as 0 correcting value restricting signal j3 because of needn't proofreading and correct in the identical situation of two coded datas.
Figure 50 is the process flow diagram of the action of the liquid crystal display drive circuit shown in expression Figure 51.Utilize with the embodiment 1 the same step till St1 to St4 and produce correction data Dc1.Then at comparison step (St11), utilize comparison means 38 relatively behind coded image data Da1, the Da0, are identical data conditions output calibration amount restricting signal j3 at both.At correction data conditioning step (St12), utilize restraint device 39 according to correcting value restricting signal j3 output calibration data Dc2.At view data aligning step (St5), according to the existing view data Di1 of correction data Dc2 correction of restraint device 39 outputs.
As noted above, when the existing view data Di1 of liquid crystal display drive circuit basis of present embodiment and decode image data Db0 produce correction data Dc, in the identical situation of encoded data D a1, Da0, be made as 0 by value with correction data Dc1, control response speed of liquid crystal that can be correct prevents the deterioration of the unnecessary caused display image of correction.
Figure 53 is other structural map of correction data generator 37 shown in expression Figure 52.Shown in Figure 53, by the data converting apparatus 12 of the figure place that reduces decode image data Db1 is set, also can according to the decode image data De1 output calibration data Dc1 after the figure place conversion textural.
In addition, correction data generator 37, also can according to the decode image data De0 output calibration data Dc1 after the figure place conversion by the data converting apparatus 14 of the figure place that reduces decode image data Db0 is set textural shown in Figure 55.
Figure 56 is the figure of second structure of expression correction data generator 37.Data converting apparatus 17 reduces the quantization digit of decode image data Db1, and after calculating interpolation coefficient k1, transmits the interpolation coefficient k1 that is calculated to correction data interpolating apparatus 19.Correction data generation device 18 decode image data De1 and decode image data Db0 output 2 inner correction data Df1, Df2 after according to the figure place conversion pass to correction data interpolating apparatus 19.Correction data interpolating apparatus 19 is according to correction data Df1, Df2 and interpolation coefficient k1, behind the compute correction data Dc1, to restraint device 39 outputs.Behind the correcting value of restraint device 39 according to the correcting value restricting signal j3 restriction correction data Dc1 of comparison means 38 outputs, export new correction data Dc2.
In addition, each action of the data converting apparatus shown in Figure 56 17, correction data generation device 18 and correction data interpolating apparatus 19 with illustrated the same of embodiment 3.
Figure 57 is the 3rd structural map of expression correction data generator 37.Data converting apparatus 20 reduces the figure place conversion process of the quantization digit of decode image data Db0, and after calculating interpolation coefficient k0, transmits the interpolation coefficient k0 that is calculated to correction data interpolating apparatus 22.Question blank 21 decode image data De0 and decode image data Db1 output 2 inner correction data Df3, Df4 after according to the figure place conversion pass to correction data interpolating apparatus 22.Correction data interpolating apparatus 22 is according to correction data Df3, Df4 and interpolation coefficient k0, behind the compute correction data Dc1, to restraint device 39 outputs.Behind the correcting value of restraint device 39 according to the correcting value restricting signal j3 restriction correction data Dc1 of comparison means 38 outputs, export new correction data Dc2.
In addition, each action of the data converting apparatus shown in Figure 57 20, question blank 21 and correction data interpolating apparatus 22 with illustrated the same of embodiment 3.
Figure 58 is the figure of the 4th structure of expression correction data generator 37. Data converting apparatus 17,20 reduces decode image data Db1, Db0 quantization digit separately, and after calculating interpolation coefficient k1, k0, transmits interpolation coefficient k1, the k0 that is calculated to correction data interpolating apparatus 24.Decode image data De1, De0 output 4 inner correction data Df1, Df2s, Df3, the Df4 of correction data generation device 24 after according to the figure place conversion passes to correction data interpolating apparatus 24.Correction data interpolating apparatus 24 carries out interpolation arithmetic according to correction data Df1, Df2, Df3, Df4 and interpolation coefficient k1, k0, behind the compute correction data Dc1, to restraint device 39 outputs.Behind the correcting value of restraint device 39 according to the correcting value restricting signal j3 restriction correction data Dc1 of comparison means 38 outputs, export new correction data Dc2.
In addition, each action of the data converting apparatus shown in Figure 58 17,20, question blank 23 and correction data interpolating apparatus 24 with illustrated the same of embodiment 3.
Figure 60 is the structural map of the liquid crystal display drive circuit of expression embodiment 8.The view data handling part 40 of present embodiment comprises frequency band limits device 41.41 export-restrictions of frequency band limits device existing view data Di1 the view data Dh1 of fixed frequency content.Frequency band limits device 41 for example utilizes the low-pass filter of limit frequency composition to constitute.The view data Dh1 that code device 4 will utilize frequency band limits device 41 to limit frequency band encodes outputting encoded data Da1.Deferred mount 5 with encoded data D a1 postpone to be equivalent to a frame during after, outputting encoded data Da0.Simultaneously, decoding device 6 is with encoded data D a1 decoding, output decoder view data Db1.In addition, decoding device 7 is with encoded data D a0 decoding, output decoder view data Db0.Correction data generator 8 produces correction data Dc according to view data Db1, Db0.At this, about the action of the back segment of code device 4, identical with embodiment 1.
Figure 59 is the process flow diagram of the action of the liquid crystal display drive circuit shown in expression Figure 60.Frequency band limits step (St13) output that is initial step utilize frequency band limits device 41 limited existing view data Di1 fixed frequency content influence data Dh1.In next picture coding step (St1), limited the coding of the view data Dh1 of frequency band.The same about the action of each step of afterwards St2～St5 and embodiment 1.
As noted above, after limiting unnecessary frequency content, encode, can suppress the encoding error of existing view data Di1.Thereby, control response speed of liquid crystal that can be correct.
In addition, frequency band limits device 41 utilize restriction the bandpass filter of fixed radio-frequency component and low-frequency component constitute and also obtain the same effect.
Figure 62 is the structural map of the liquid crystal display drive circuit of expression embodiment 9.After noise removing device 43 was removed the noise contribution of existing view data Di1, the view data Dk1 of noise contribution had been removed in output.At this, noise contribution is the little radio-frequency component of the accurate variation in position.Code device 4 will utilize the view data Dk1 coding of noise removing device 43 outputs, outputting encoded data Da1.The same about the action of the back segment of code device 4 and embodiment 1.
Figure 61 is the process flow diagram of the action of the liquid crystal display drive circuit shown in expression Figure 62.Remove step (St14) at the noise that is initial step, output utilizes noise removing device 43 to remove the view data Dk1 of the noise contribution of existing view data Di1.In the coded image data step (St1) that is second step, carry out the coding of view data Dk1.The same about the action of each step of afterwards St2～St5 and embodiment 1.
As noted above, after removing noise contribution, encode, can suppress the encoding error of existing view data Di1.Thereby, control response speed of liquid crystal that can be correct.
Figure 64 is the structural map of the liquid crystal display drive circuit of expression embodiment 10.Utilize the picture signal formation of the picture signal of receiving trap 2 receptions by red (R), green (G), blue (B).View data handling part 44 at present embodiment comprises colour space transformation device 45,46,47.After colour space transformation device 45 is transformed into the Y-C signal that is made of luminance signal (Y) and chrominance signal (C) with the existing view data Di1 of R, G, B, the existing view data Dm1 of output Y-C signal.Code device 4 will show back output of view data Dm1 coding and existing view data Dm1 corresponding codes data Da1.Deferred mount 5 by encoded data D a1 is postponed be equivalent to a frame during after, the image corresponding codes data Da0 before the frame of output and existing image.Decoding device 6,7 is by with encoded data D a1, Da0 decoding, exports and show the decode image data Db1 and and the decoded data Db0 of the preceding image correspondence of a frame of existing image of image correspondence respectively.
After decode image data Db1, the Db0 of the Y-C signal that colour space transformation device 46,47 will be made of luminance signal (Y) and chrominance signal (C) is transformed into the digital signal of R, G, B, view data Dn1, the Dn0 of output R, G, B.Correction data generator 8 is according to view data Dn1, Dn0 output calibration data Dc.
Figure 63 is the process flow diagram of action of the liquid crystal display drive circuit of the present embodiment of expression shown in Figure 64.In the first colour space transformation step (St15) that is initial step, output utilizes colour space transformation device 45 the existing view data Di1 of R, G, B to be transformed into the view data Dm1 of the Y-C signal that is made of luminance signal (Y) and chrominance signal (C).In next coded image data step (St1), utilize the encoded data D a1 after view data Dm1 is encoded in code device 4 outputs.
Postpone step (St2) in coded data, utilize the preceding encoded data D a0 of a frame of deferred mount 5 outputting encoded data Da1.In next image data decoding step (St3), the decoded decode image data Db1 of encoded data D a0, Db0 before utilizing decoding device 6,7 output with encoded data D a1 and frame.
In the second colour space transformation step (St16), output utilizes colour space transformation device 46,47 decode image data Db1, Db0 to be transformed into view data Dn1, the Dn0 of R, G, B digital signal from the Y-C signal that is made of luminance signal (Y) and chrominance signal (C).Produce step (St4) in next correction data, produce correction data Dc according to view data Dn1, Dn0.
As noted above, by encoding behind the view data Dm1 that R, G, B signal transformation is become the Y-C signal that constitutes by luminance signal and chrominance signal, can improve encoding rate (data compression rate).Thereby, can reduce making encoded data D a1 postpone the capacity of the storer of required deferred mount 5.
In addition, also can according to luminance signal and chrominance signal change compressibility textural.At this moment,, improve compressibility, can reduce the capacity of encoded data D a1 and keep the required information of generation of correction data for chrominance signal by reducing compressibility in the range of information not damaging for luminance signal.
Figure 65 is other structural map of the liquid crystal display drive circuit of expression present embodiment.
Figure 65 represents to utilize receiving trap 2 with the structure of picture signal as the situation of the Y-C signal reception that is made of luminance signal and chrominance signal.At view data handling part 48,49 outputs of colour space transformation device are transformed into the existing view data Di1 of Y-C signal the view data Dn2 of R, G, B digital signal.46,47 outputs of colour space transformation device are transformed into decode image data Db1, Db0 decode image data Dn1, the Dn0 of R, G, B, digital signal.
Figure 66 is first figure that constructs of the liquid crystal display drive circuit of expression present embodiment 11.Shown in Figure 66, at the view data handling part 50 of present embodiment, code device 4 outputs will utilize the encoded data D a1 after the view data Dj1 of means for correcting 9 outputs encodes.Deferred mount 5 output with encoded data D a1 postpone to be equivalent to a frame during encoded data D a0.Decoding device 6,7 outputs are with the decoded separately decode image data Db1 of encoded data D a1, Da0, Db0.At this, decode image data Db1 and the view data Dj1 correspondence of utilizing means for correcting 9 to export, decode image data Db0 and the view data correspondence of before the frame of view data Dj1, exporting.Correction data generator 8 is according to decode image data Db0, Db1 output calibration data Dc.Means for correcting 9 is the same with the action of embodiment 1, by the tone value according to correction data Dc image correcting data Di1, behind the new view data Dj1 of generation and existing view data Di1 correspondence, to display device 10 and code device 4 outputs.
Figure 67 is the figure of response characteristic that is illustrated in the liquid crystal of display device 10.At Figure 67, the existing view data Di1 before (a) expression is proofreaied and correct, the value of the view data Dj1 after (b) expression is proofreaied and correct, the response characteristic of liquid crystal when (c) expression has applied voltage according to view data Dj1.Shown in Figure 67 (b), before the tone value of existing image is than a frame, increase situation about reducing, by subtracting each other, produce the expression and the existing view data Dj1 of the new image of image correspondence according to corrected value and the existing view data Di1 addition of correction data Dc.In display device 10, by liquid crystal being applied voltage, shown in Figure 67 (c), can drive liquid crystal according to view data Dj1, make in about image duration, become fixed transmissivity.Shown in Figure 67 (b), situation about before the tone value that shows image is than a frame, increasing, the tone value of the view data Dj1 after the correction only increases V1 ' with respect to existing view data Di1, at next frame, only reduces V3 with respect to existing view data Di1.In addition, situation about before than a frame, reducing, the tone value of the view data Dj1 after the correction only reduces V2 ' with respect to existing view data Di1, at next frame, only increases V4 with respect to existing view data Di1.Thereby, shown in Figure 67 (c), the pace of change that shows tone is improved, and can emphasize the variation of tone.
Figure 68 is second figure that constructs of the liquid crystal display drive circuit of expression present embodiment.At view data handling part 51, substitute illustrated code device 4 at embodiment 4, data converting apparatus 26 is set, the quantization digit of the view data Dj1 by will utilizing means for correcting 9 outputs is for example from 8 bit maps to 3 a packed data capacity.
Figure 69 is the 3rd figure that constructs of the liquid crystal display drive circuit of expression present embodiment.At view data handling part 52, as shown in the explanation of embodiment 5, at correction data generator 28, detection utilizes the view data Dj1 of means for correcting 9 outputs and the error of decode image data Db1, according to the correcting value of the error limitation correction data Dc that is detected textural.
Figure 70 is the 4th figure that constructs of the liquid crystal display drive circuit of expression embodiment 11.In the correction data generating unit 35 of view data handling part 53, produce correction data Dc at textural view data Dj1 and decode image data Db0 according to means for correcting 9 outputs.On effect, obtain the effect the same with embodiment 6.
Figure 71 is the 5th figure that constructs of the liquid crystal display drive circuit of expression present embodiment.At view data handling part 54, as shown in the explanation of embodiment 7, at textural relatively encoded data D a1 and the encoded data D a0 that utilizes after deferred mount 5 postpones, at the correcting value of both identical situations restriction correction data Dc.
The present invention is not defined as at the above-mentioned structure that each embodiment put down in writing, and those of ordinary skill in the art changes other structure in the content shown in the claim also can.
The effect of invention
If according to liquid crystal display drive circuit of the present invention and LCD drive method, by after will postponing The figure place that the tone value of Image Coding or minimizing image quantizes can reduce making picture delay required The capacity of frame memory, can eliminate because extracting and process the incorrect Control of Voltage that takes place.
In addition, because of the correction data of the tone value of the existing image of output calibration, so that at an about frame Liquid crystal becomes and shows the transmissivity corresponding to tone value of image, control liquid crystal that can be correct during this time Response speed.
Claims (15)
1. a liquid crystal display drive circuit (3), producing decision from the tone value of the input picture that is made of a series of frame is the view data that input picture is shown in the voltage that liquid crystal applies, and it is characterized in that, comprising:
Correspondingly with the frame of input picture will show picture coding, output and the described device (4) that shows image corresponding codes image;
With described coded image decoding, the device (6) of first decoded picture of output and existing image correspondence;
Make described coded image postpone to be equivalent to a frame during device (5);
With the described coded image decoding after postponing, export the device (7) of second decoded picture;
Produce the correction device (8) of the correction data of the tone value of image now according to first decoded picture and second decoded picture; And
According to showing the device (9) that image and correction data produce described view data.
2. liquid crystal display drive circuit as claimed in claim 1 (3) is characterized in that, described correction data reaches liquid crystal in about image duration and shows the transmittance values of the tone value correspondence of image.
3. liquid crystal display drive circuit as claimed in claim 1 (3) is characterized in that, the device (8) that produces described correction data comprise reduce first decoded picture and second decoded picture at least one the device (12,14) of quantization digit of tone value.
4. liquid crystal display drive circuit as claimed in claim 3 (3) is characterized in that, the device (8) that produces described correction data comprising:
The decoded picture that use has reduced quantization digit produces the device (18,21,23) of the first inner correction data and the second inner correction data; And
Utilize the device (19,22,24) of interpolation calculation correction data from the first inner correction data and the second inner correction data.
5. liquid crystal display drive circuit as claimed in claim 1 (3) is characterized in that, the device (28) that produces correction data comprising:
Detect the device (29) of the error of first decoded picture and existing image; And
Device (30) according to the value of the error limitation correction data that is detected.
6. liquid crystal display drive circuit as claimed in claim 1 (3) is characterized in that, the device (28) that produces correction data comprising:
Detect the device (31) of the error of first decoded picture and existing image; And
With sum of errors first decoded picture that detected and the device (32) of the second decoded picture addition.
7. liquid crystal display drive circuit as claimed in claim 1 (40) is characterized in that, comprising:
Frequency band limits device (41), reduce existing image contained fixed frequency content; And
By with the output encoder of frequency band limits device and will show the device (4) of picture coding.
8. liquid crystal display drive circuit as claimed in claim 1 (42) is characterized in that, comprising:
Noise removing device (43) reduces the existing contained noise contribution of image; And
By with the output encoder of noise removing device and will show the device (4) of picture coding.
9. liquid crystal display drive circuit as claimed in claim 1 (44) is characterized in that, comprising:
With the luminance signal of existing image and the device (45) of chrominance signal conversion; And
By luminance signal and chrominance signal coding being showed the device (4) of picture coding.
10. a liquid crystal display drive circuit (25), from the input picture that constitutes by a series of frame with the tone value that quantizes of fixed figure place to produce decision be the view data that input picture is shown in the voltage that liquid crystal applies, it is characterized in that, comprising:
By the corresponding quantization digit that reduces the tone value of existing image, produce and the device (26) of first image of existing image correspondence with the frame of input picture;
By make first picture delay be equivalent to a frame during output second image device (5);
Produce the correction device (8) of the correction data of the tone value of image now according to first image and second image; And
According to showing the device (9) that image and correction data produce described view data.
11. liquid crystal display drive circuit as claimed in claim 10 (25) is characterized in that, described correction data reaches liquid crystal in about image duration and shows the transmittance values of the tone value correspondence of image.
12. a liquid crystal display drive circuit (34), producing decision from the tone value of the input picture that is made of a series of frame is the view data that input picture is shown in the voltage that liquid crystal applies, and it is characterized in that, comprising:
Correspondingly with the frame of input picture will show picture coding, the device (4) of first coded image of output and existing image correspondence;
By described first coded image is postponed be equivalent to a frame during the device (5) of output second coded image;
With the decoding of second coded image, the device (7) of the decoded picture of the preceding frame correspondence of output and input picture;
Produce the correction device (35) of the correction data of the tone value of image now according to existing image and decoded picture; And
According to showing the device (9) that image and correction data produce described view data.
13. liquid crystal display drive circuit as claimed in claim 12 (34) is characterized in that, described correction data reaches liquid crystal in about image duration and shows the transmittance values of the tone value correspondence of image.
14. liquid crystal display drive circuit as claimed in claim 12 (34) is characterized in that, the device (37) that produces described correction data is included in the identical situation of first coded image and second coded image and the value of correction data is made as zero device (38,39).
15. liquid crystal display drive circuit as claimed in claim 12 (34) is characterized in that, also comprises with the decoding of first coded image device (6) of the decoded picture of output and existing image correspondence;
The device (28) that produces correction data comprising:
Detect the device (31) of the error of existing image and the decoded picture corresponding with existing image; And
Will with the device (32) of the sum of errors input picture addition that decoded picture detected of preceding frame correspondence.
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| CNB031102115A CN1332371C (en) | 2003-04-04 | 2003-04-04 | Liquid crystal drive circuit |
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| CNB031102115A CN1332371C (en) | 2003-04-04 | 2003-04-04 | Liquid crystal drive circuit |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6189232A (en) * | 1984-09-28 | 1986-05-07 | デーエスエム・ナムローゼ・フェンノートシャップ | Continuous production of polymer uniform solution |
| JP2002091390A (en) * | 2000-09-13 | 2002-03-27 | Advanced Display Inc | Liquid crystal display device and its circuit device for drive |
| US20020126075A1 (en) * | 2001-03-12 | 2002-09-12 | Willis Donald Henry | Reducing sparkle artifacts with post gamma correction slew rate limiting |
| JP2002297104A (en) * | 2001-03-29 | 2002-10-11 | Fujitsu Ltd | Control circuit for performing drive compensation for high speed response for liquid crystal display device |
| CN1375813A (en) * | 2001-03-09 | 2002-10-23 | 汤姆森特许公司 | Method and apparatus for using low-brightness to treat non-natural signal of reducing glint |
| CN1375995A (en) * | 2001-03-09 | 2002-10-23 | 汤姆森特许公司 | Use of low-brightness filtering to reduce non-natural glint signals |
-
2003
- 2003-04-04 CN CNB031102115A patent/CN1332371C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6189232A (en) * | 1984-09-28 | 1986-05-07 | デーエスエム・ナムローゼ・フェンノートシャップ | Continuous production of polymer uniform solution |
| JP2002091390A (en) * | 2000-09-13 | 2002-03-27 | Advanced Display Inc | Liquid crystal display device and its circuit device for drive |
| CN1375813A (en) * | 2001-03-09 | 2002-10-23 | 汤姆森特许公司 | Method and apparatus for using low-brightness to treat non-natural signal of reducing glint |
| CN1375995A (en) * | 2001-03-09 | 2002-10-23 | 汤姆森特许公司 | Use of low-brightness filtering to reduce non-natural glint signals |
| US20020126075A1 (en) * | 2001-03-12 | 2002-09-12 | Willis Donald Henry | Reducing sparkle artifacts with post gamma correction slew rate limiting |
| JP2002297104A (en) * | 2001-03-29 | 2002-10-11 | Fujitsu Ltd | Control circuit for performing drive compensation for high speed response for liquid crystal display device |
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