CN103854616A - Crosstalk compensation method of display panel and display device thereof - Google Patents
Crosstalk compensation method of display panel and display device thereof Download PDFInfo
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- CN103854616A CN103854616A CN201210524278.XA CN201210524278A CN103854616A CN 103854616 A CN103854616 A CN 103854616A CN 201210524278 A CN201210524278 A CN 201210524278A CN 103854616 A CN103854616 A CN 103854616A
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Abstract
The embodiment of the invention provides a crosstalk compensation method of a display panel and a display device of the crosstalk compensation method. The crosstalk compensation method includes the following steps that firstly, a gray scale compensation range is set, wherein the gray scale compensation range includes gray scales ranging between the lowest gray scale and the highest gray scale; secondly, a lookup table is established to record a plurality of compensation values which correspond to the gray scales in the gray scale compensation range respectively; thirdly, whether the gray scale of first-color sub-pixels on the display panel is within the gray scale compensation range or not is judged, if yes, a corresponding compensation value is selected from the lookup table to adjust the initial gray scale of second-color sub-pixels to a corrected gray scale, and otherwise the initial gray scale of the second-color sub-pixels is maintained, wherein the first-color sub-pixels are adjacent to the second-color sub-pixels.
Description
Technical field
The present invention relates to a kind of compensation method and display device thereof of display panel, and particularly a kind of crosstalk compensation method and display device thereof of display panel.
Background technology
Lightweight, the advantage such as volume is little, low power consumption, low battery that display panel has, has been widely used in various types of communication and consumption electronic products, such as TV, notebook computer, mobile phone and personal digital assistant etc. at present.
For the aperture opening ratio that increases pixel on display panel is to obtain higher penetration or lower power consumption, generally the spacing between adjacent subpixels electrode can be reduced, even by overlapping the data line of pixel electrode and adjacent sub-pixel.But this way can cause capacitive coupling to increase, and then causes the demonstration problems such as cross-talk.Industry, by laying approximately 2～4 microns of organic layers that (um) is thick of one deck (polymer flm on array, PFA), alleviates capacitive coupling situation at present.
But in specific drive pattern situation, the laying mode of above-mentioned sub-pixel still has the capacitive coupling phenomenon of certain degree.For instance, in the time using the reversion of N row to add pure color picture, because voltage difference between sub-pixel is apart from large, still can cause serious color cross-talk (color crosstalk) situation.Brightness and colourity when described color cross-talk refers to that hot, green, blue three-color sub-pixel lays respectively at certain specific grey-scale (pure red, pure green, ethereal blue), after calculating via colour mixture and be not equal to white brightness and colourity.White is to be all positioned under this specific grey-scale at whole sub-pixels herein, measured brightness and colourity.Color cross-talk ratio can be calculated and be obtained by following formula (1),
Wherein black brightness represents the brightness that whole sub-pixels all have in the time of zero GTG, represents the brightness of background.
For example, if the maximum color cross-talk of display panel is when exceeding the specification (maximum color cross-talk ratio is 20%) that client specifies, represent that this display panel is under this client's driving is set, its display quality is compared other display panels may be poor, especially the situation of GTG brightness display error may be comparatively obvious, therefore do not accepted by client.
Summary of the invention
In view of this, the embodiment of the present invention provides a kind of crosstalk compensation method and display device thereof of display panel, can be according to the GTG of a sub-pixel in display panel, the gray scale voltage of synchronous another sub-pixel of adjusting contiguous this sub-pixel of configuration, uses and reduces or eliminate cross-talk than the quality of the display panels promoting.
The embodiment of the present invention provides a kind of crosstalk compensation method of display panel.Described crosstalk compensation method comprises the following steps.First, set a gray scale compensation scope, wherein this gray scale compensation scope is greater than the minimum gray scale of the first color sub-pixels and is less than the high gray of the first color sub-pixels.Secondly, set up a look-up table, this look-up table has the multiple offsets to each GTG within the scope of should gray scale compensation.In the time that the GTG of the first color sub-pixels is positioned at this gray scale compensation scope according to a view data, searches this look-up table and obtain a corresponding offset.Then, according to this offset, the initial GTG of the second color sub-pixels is adjusted into correction GTG.When the GTG of the first color sub-pixels is positioned at outside this gray scale compensation scope according to view data, maintain the GTG of the second color sub-pixels in initial GTG.Described the first color sub-pixels is adjacent with described the second color sub-pixels.
The embodiment of the present invention provides a kind of display device, and described display device comprises a display panel, and it has one first adjacent color sub-pixels and one second color sub-pixels, and a driver element.Driver element has time schedule controller, data drive circuit and reservoir.Data drive circuit receives the GTG signal of time schedule controller output and changes GTG signal into magnitude of voltage, shows with the first color sub-pixels and the second color sub-pixels that drive display panel.Described driver element is in order to carry out the following step.First, set a gray scale compensation scope, wherein gray scale compensation scope is greater than the minimum gray scale of the first color sub-pixels and is less than the high gray of the first color sub-pixels.Secondly, set up a look-up table and be stored in reservoir, wherein look-up table has the multiple offsets to each GTG within the scope of should gray scale compensation.In the time that the GTG of the first color sub-pixels is positioned at this gray scale compensation scope according to a view data, this time schedule controller is obtained a corresponding offset via this look-up table.This time schedule controller is adjusted to correction GTG according to this offset by the initial GTG of this second color sub-pixels.When the GTG of the first color sub-pixels is positioned at outside this gray scale compensation scope according to view data, this time schedule controller maintains this second color sub-pixels in this initial GTG.
Crosstalk compensation method and the display device thereof of the display panel that in sum, the embodiment of the present invention provides.The crosstalk compensation method of this display panel and display device thereof can in drive display panel wherein a color sub-pixels shows a GTG time, by adjusting the GTG brightness of another color sub-pixels adjacent thereto, effectively eliminate the cross-talk between color sub-pixels and another color sub-pixels of vicinity.Accordingly, can reduce the luminance difference between adjacent color sub-pixel on display panel, and then promote the quality of overall display frame.
For enabling further to understand feature of the present invention and technology contents, refer to following about detailed description of the present invention and accompanying drawing, but these explanations with appended graphic be only for the present invention is described, but not claim scope of the present invention is done to any restriction.
Brief description of the drawings
Fig. 1 is the circuit diagram of the display device that provides of the embodiment of the present invention.
Fig. 2 is the gray scale variation curve synoptic diagram of the embodiment of the present invention the second color sub-pixels.
Fig. 3 is that the embodiment of the present invention provides color cross-talk to compare curve synoptic diagram.
Fig. 4 is the schematic flow sheet of the crosstalk compensation method of the display panel that provides of the embodiment of the present invention.
[main element symbol description]
100: display device
112: main pixel
114a: red sub-pixel
114b: green sub-pixels
110: display panel
120: backlight module
130: driver element
131: scan drive circuit
132: data drive circuit
133: time schedule controller
134: reservoir
200: square frame
R, G, B: color sub-pixels is capable
C10～C40: curve
K: offset
X: the maximum value of offset
L: the maximum modified GTG of the second color sub-pixels
W: gray scale compensation scope
R10, R20: region
S100～S170: steps flow chart
Embodiment
Please refer to Fig. 1, Fig. 1 illustrates the circuit diagram of the display device that the embodiment of the present invention provides.The display device 100 of the present embodiment is a liquid crystal indicator, comprises display panel 110, backlight module 120 and driver element 130.Driver element 130 couples display panel 110 and backlight module 120, in order to this display panel 110 and this backlight module 120 driving data signal and voltage signals to be provided.In the present embodiment, driver element 130 can utilize gray scale compensation mode (being crosstalk compensation method) to reduce or for example eliminate in display panel 110, because meeting the pixel electrode (pixel electrode) (red sub-pixel R) that starts and intercouple and produce cross-talk with adjacent pixel electrode (green sub-pixels G) or data line (not shown), uses the quality of the display frame that promotes display panel.
Say further, display panel 110 has a pel array (pixel array), comprise multiple pixel 112(pixel), M bar is arranged in parallel and the sweep trace (scan line) (not being illustrated in Fig. 1) of mutually insulated and N bar and the staggered data line (data line) (not shown in Fig. 1) of sweep trace, and M, N are positive integer.Each pixel 112 in display panel 110 described in this embodiment is to be made up of three color sub-pixels (sub-pixel), is also that red sub-pixel R, green sub-pixels G and blue subpixels B form.Taking single pixel as example, the sub-pixel of three colors couples a sweep trace jointly, and each color sub-pixels couples respectively a data line.In other words, every a line is to be arranged by same color sub-pixels, and each row is sequentially to be arranged by red sub-pixel R, green sub-pixels G and blue subpixels B.
The display panel 110 of the present embodiment is to use N row reversion (N-line inversion) type of drive.Specifically, as shown on 110 polarity signs of display panel in Fig. 1, be to adopt biserial reversion (2-line inversion) type of drive, the also i.e. polarity that alternately changes gray scale voltage of the sub-pixel on every two row horizontal lines.But it should be noted that display panel 110 also can adopt 3 row reversions (3-line inversion), the modes such as some reversion (dot inversion) or row reversion (column inversion) drive, and the present embodiment does not limit.
In the present embodiment, time schedule controller 133 can for example, for example, according to the corresponding initial GTG of adjusting adjacent the second color sub-pixels (green sub-pixels 114b) of the GTG of the first color sub-pixels of view data (red sub-pixel 114a).Eliminate according to this for example, for example, cross-talk between the first color sub-pixels (red sub-pixel 114a) and the second color sub-pixels (green sub-pixels 114b).It should be noted that the first color sub-pixels and the second color sub-pixels do not limit, also can be other combinations outside red-green, for example green sub-pixels G and blue subpixels B.
Specifically, time schedule controller 133 can, by initiatively searching reservoir 134, obtain the offset of the second color sub-pixels of corresponding each GTG, and the corresponding initial GTG of adjusting the second color sub-pixels is for revising GTG.The correction GTG signal that time schedule controller 133 is exported the second color sub-pixels to export corresponding gray scale voltage, is adjusted the brightness of the second color sub-pixels to data drive circuit 132.Accordingly to reduce the first color sub-pixels and the second color sub-pixels brightness (or voltage) difference in display frame.
In detail, described reservoir 134 has a look-up table, and described look-up table records corresponding each color sub-pixels in multiple offsets of each GTG.The mode of setting up of described look-up table can be the gray scale compensation scope that first determines corresponding the first color sub-pixels, then inputs the compensation GTG of the second color sub-pixels.Specifically, described gray scale compensation scope is greater than the minimum gray scale of the first color sub-pixels and is less than the high gray of the first color sub-pixels, is also that gray scale compensation scope is between the high gray and the minimum gray scale of the first color sub-pixels of the first color sub-pixels.In other words, gray scale compensation scope does not comprise minimum gray scale and high gray, to avoid display panel 110 cannot meet pure color (being high gray and the minimum gray scale of solid color sub-pixel) brightness and the colourity specification of customer demand.Having 8 (8-bit) resolution as example taking solid color sub-pixel in display panel 110 for instance, is also each color sub-pixels tool 256 GTG, and the gray scale compensation scope of the first color sub-pixels does not comprise 0 GTG and 255 GTGs.
In addition, described gray scale compensation scope can be that the grey-scale range that is subject to crosstalk effect according to color sub-pixels in display panel 110 arranges, but the present embodiment is not as limit.In a practice, gray scale compensation scope can recently arrange according to the measured color cross-talk of display panel 110.Moreover within gray scale compensation scope, look-up table has the offset that is not 0 GTG, and is positioned at beyond gray scale compensation scope, in look-up table, corresponding offset is all 0 GTG.
If within time schedule controller 133 judges that according to view data the GTG of the first color sub-pixels is positioned at this gray scale compensation scope, time schedule controller 133 compensates the initial GTG of the second adjacent color sub-pixels, produce one and revise GTG.Time schedule controller 13 is exported the correction GTG signal of the second corresponding color sub-pixels subsequently to data drive circuit 131.If time schedule controller 133 judges the first color sub-pixels and is positioned at beyond this gray scale compensation scope, the GTG of the second color sub-pixels is not compensated and corrected, and the initial GTG signal that maintains the second color sub-pixels corresponding to initial GTG output is to data drive circuit 131.
In addition, if the solid color sub-pixel of a display device 100 has i GTG, for example 8 color sub-pixels have 256 GTGs, and i is that 256,10 color sub-pixels have 1024 GTGs, and i is 1024, and wherein i is positive integer.If the offset of each GTG of the second color sub-pixels within the scope of gray scale compensation is arranged and is presented an ordered series of numbers according to the GTG of the first color sub-pixels order from small to large.If the compensation GTG value of the second color sub-pixels is between 0～2 GTG within the scope of the gray scale compensation of the first color sub-pixels, the maximum value in offset ordered series of numbers need be less than or equal to i/128.If the compensation GTG value of the second color sub-pixels is between 0～4 GTG within the scope of the gray scale compensation of the first color sub-pixels, the maximum value in offset ordered series of numbers need be less than or equal to i/64.Accordingly, to avoid causing the difference of significant brightness in display frame, affect Picture Showing.In other words, the second color sub-pixels maximum value in offset ordered series of numbers within the scope of gray scale compensation can be according on display panel 110, the optical specification of the second color sub-pixels being arranged.
In addition, these offsets in offset ordered series of numbers are by the lower limit of this gray scale compensation scope between the maximum value of offset ordered series of numbers being sort ascending, and it represents must be more than or equal to close to the offset of this maximum value in offset ordered series of numbers the offset of the upper limit that approaches this gray scale compensation scope.On the contrary, these offsets in offset ordered series of numbers are by the maximum value of offset ordered series of numbers between the upper limit of this gray scale compensation scope being sort descending, and it represents must be more than or equal to close to the offset of this maximum value in offset ordered series of numbers the offset of the lower limit that approaches this gray scale compensation scope.In other words, in offset ordered series of numbers, these offsets are at the lower limit of this gray scale compensation scope between the maximum value of offset ordered series of numbers, meeting is along with the GTG of the first color sub-pixels increases and cumulative, and these offsets are directly proportional at this interval GTG to the first color sub-pixels.And in offset ordered series of numbers these offsets in the maximum value of offset ordered series of numbers to increasing and decrescence, these offsets and the first color sub-pixels are inversely proportional at this interval GTG along with the GTG of the first color sub-pixels between the upper limit of this gray scale compensation scope.That is to say, this offset ordered series of numbers presents a step curve.
Subsidiary one carries, and can have multiple trapezoidal offset ordered series of numbers within the scope of this gray scale compensation.That is to say, the first color sub-pixels of display panel 110 can compare specification demands according to the color cross-talk of measuring, and there is gray scale compensation scope multiple times, to pass through to adjust the GTG value of the second adjacent color sub-pixels in gray scale compensation scope, reduce or eliminate the cross-talk ratio of the first color sub-pixels and the second color sub-pixels within the scope of these gray scale compensation, and then improve the quality of the display frame of display panel.
Then, utilize offset further to comprise the following steps with the step of the initial GTG of revising the second color sub-pixels.First, the deviser of display panel 110 can preset the maximum modified GTG of corresponding the second color sub-pixels.Maximum modified GTG, between the high gray and minimum gray scale of the second color sub-pixels, and is not minimum gray scale and high gray.More particularly, described maximum modified GTG is more than or equal to the maximum compensation GTG value of the second color sub-pixels in gray scale compensation scope, the maximum value of also mending normal value ordered series of numbers.
Then, time schedule controller 133 judges the relation of initial GTG and the maximum modified GTG of the second color sub-pixels.If time schedule controller 133 judges the initial GTG of the second color sub-pixels and is greater than this maximum modified GTG, uncompensation and directly exporting as revising GTG using initial GTG.If time schedule controller 133 judges the initial GTG of the second color sub-pixels and is less than or equal to maximum modified GTG, utilize following interpolation method formula, formula (2) calculates the correction GTG of the second color sub-pixels,
Wherein revise GTG and be generally a positive integer.For example, in a practice, if the correction GTG of calculating has decimal fractions, the mode that can round up or remove decimal fractions is processed and all can.In another practice, to revise GTG and also can there is decimal fractions, time schedule controller 133 also can utilize trembles look algorithm (dithering), glimmers and drives the second color sub-pixels colour mixture to produce required correction GTG brightness with space or time mode.Tremble the real the technology of the present invention field those of ordinary skill that belongs to of technology contents of look algorithm and know well, therefore also no longer repeated at this.
In addition, in the GTG ordered series of numbers through the GTG value of corrected the second color sub-pixels at the second color sub-pixels, must be ascending series, namely GTG does not have reversal development and produces.All correction GTGs must be less than or equal to the overhaul GTG of the second color sub-pixels.
Then, have 8 bit resolutions as example taking each color sub-pixels, driver element 130 can carry out by transmitting 8 bit digital GTG signals in the time enabling in scan drive circuit 131 analog voltage of drive control data driving circuit generation adjustment color sub-pixels.As aforementioned, reservoir 134 has a look-up table of corresponding red sub-pixel R, green sub-pixels G and blue subpixels B, and look-up table has the multiple offsets of corresponding each color sub-pixels at each GTG.Time schedule controller 133 can be searched according to the GTG of the first color sub-pixels the offset of the corresponding color sub-pixels GTG of the second color sub-pixels.In this embodiment, look-up table is as following table (i.e. table one).
Above-mentioned gray scale compensation scope is as shown in table 1, is 4 GTG to 254 GTGs.In other words, gray scale compensation scope under be limited to 4 GTGs.And gray scale compensation scope on be limited to 254 GTGs.
In simple terms, taking red sub-pixel 114a as the first color sub-pixels, and being the second color sub-pixels, green sub-pixels 114b illustrates.Please refer to table, when time schedule controller 133 wishs drive driving data driving circuit control red sub-pixel 114a(first color sub-pixels of display panels 110) for example, while showing a GTG (being 6 GTGs), time schedule controller 133 can be because the GTG of judgement red sub-pixel 114a be within the scope of gray scale compensation, and automatic searching is stored in green sub-pixels 114b(the second color sub-pixels corresponding in the look-up table of reservoir 134) offset, i.e. 6 GTGs.
Then, time schedule controller 133 is according to green sub-pixels 114b(the second color sub-pixels) offset, judge green sub-pixels 114b(the second color sub-pixels) offset (i.e. 6 GTGs) whether be greater than the maximum modified GTG of the second default color sub-pixels.If time schedule controller 133 judges green sub-pixels 114b(the second color sub-pixels) offset (i.e. 6 GTGs) be less than default green sub-pixels 114b(the second color sub-pixels) maximum modified GTG, time schedule controller 133, immediately by above-mentioned interpolation method formula, is also the correction GTG that formula (2) calculates the second color sub-pixels.
For instance, suppose green sub-pixels 114b(the second color sub-pixels) initial GTG be zero GTG, and maximum modified GTG is 10 GTGs, green sub-pixels 114b(the second color sub-pixels) correction GTG be 6 GTGs, calculate as formula (3) in detail,
Accordingly, time schedule controller 133 simultaneously output device has corresponding red sub-pixel 114a(the first color sub-pixels) be the digital gray level signal and corresponding green sub-pixels 114b(the second color sub-pixels of 6 GTGs) correction GTG be the numeral correction GTG signal of 6 GTGs to data drive circuit 132, drive red sub-pixel 114a and green sub-pixels 114b to carry out picture disply to produce corresponding driving voltage cooperation scan drive circuit 131.
Again for instance, suppose green sub-pixels 114b(the second color sub-pixels) initial GTG be 4 GTGs, and maximum modified GTG is 10 GTGs, green sub-pixels 114b(the second color sub-pixels) correction GTG be 6 GTGs, calculate as formula (4) in detail
Accordingly, time schedule controller 133 simultaneously output device has corresponding red sub-pixel 114a(the first color sub-pixels) be the digital gray level signal and corresponding green sub-pixels 114b(the second color sub-pixels of 6 GTGs) correction GTG be one of them numeral correction GTG signal of 7.6 GTGs, 7 GTGs (removal radix point) and 8 GTGs (rounding up) to data drive circuit 132, drive red sub-pixel 114a and green sub-pixels 114b to carry out picture disply to produce corresponding driving voltage cooperation scan drive circuit 131.
And judge red sub-pixel 114a(the first color sub-pixels when time schedule controller 133) GTG between gray scale compensation scope, but green sub-pixels 114b(the second color sub-pixels) be greater than default green sub-pixels 114b(the second color sub-pixels) maximum modified GTG time, time schedule controller 133 is using green sub-pixels 114b(the second color sub-pixels) initial GTG as revising GTG.Accordingly, time schedule controller 133 simultaneously output device has corresponding red sub-pixel 114a(the first color sub-pixels) be the GTG signal and corresponding green sub-pixels 114b(the second color sub-pixels of 6 GTGs) the correction GTG signal of initial GTG to data drive circuit 132, to carry out picture disply.
In addition, if judge red sub-pixel 114a(the first color sub-pixels when time schedule controller 133) GTG exceed gray scale compensation scope, for example, while being 255 GTG, time schedule controller 133 can direct basis green sub-pixels 114b(the second color sub-pixels) initial GTG output, and uncompensated action.Although in above-mentioned example, to illustrate with two-wire inversion driving mode, but use three lines reversions or other type of drive to drive the mode of display panels 110 via the driver element that the those of ordinary skill in above-mentioned explanation field of the present invention should be known this enforcement by inference, therefore do not repeat at this.
Then, Fig. 2 illustrates the gray scale variation curve synoptic diagram of the embodiment of the present invention the second color sub-pixels.As shown in Figure 2, curve C 10 represents that the second color sub-pixels is in the gray scale compensation curve of corresponding the first color sub-pixels of each GTG.Region R10 refers to that the initial GTG of the second color sub-pixels produces correction GTG in the time of zero GTG via gray scale compensation.The initial GTG of the second color sub-pixels is K in the offset of zero GTG, and maximum value in offset is X.If the initial GTG of the second color sub-pixels is less than or equal to maximum modified GTG L, the correction GTG of the second color sub-pixels is adopted gradual (ascending series) increases, be region R20, wherein the each correction GTG in the R20 of region is to see through to utilize interpolation method formula, i.e. formula (2) computing produces.Make according to this GTG brightness curve smooth-going (smooth) of the second color sub-pixels, use the difference of avoiding causing on visual contrast.It should be noted that, as shown in curve C 10, the initial GTG of the second color sub-pixels the highest compensation GTG in the offset of zero GTG has been maximum value X, therefore the correction GTG of the initial GTG of the second color sub-pixels in the time of non-zero GTG need be greater than maximum value X, and present in cumulative mode, be that curve C 10 avoids the GTG of the second color sub-pixels to produce reversal development for having the curve of positive slope, using.
In addition, from region R10, in the gray scale compensation scope W of the first color sub-pixels, offset between the maximum value X of offset and the lower limit of gray scale compensation scope W is and increases progressively curve, the curve and offset between the maximum value X of offset and the upper limit of gray scale compensation scope W tapers off.In other words, as shown in Figure 2, the offset of the second color sub-pixels is limited between the maximum value X of offset under the gray scale compensation scope W of the first color sub-pixels can be increased and cumulative along with the GTG of the first color sub-pixels; The offset of the second color sub-pixels at the maximum value X of offset to increasing and decrescence along with the GTG of the first color sub-pixels between the upper limit of the gray scale compensation scope W of the first color sub-pixels.That is to say, the region R10 that the correction GTG that the initial GTG of the second color sub-pixels produces in zero GTG forms is trapezoid area.
Then, please refer to Fig. 3 and simultaneously with reference to Fig. 1, Fig. 3 illustrates that color cross-talk that the embodiment of the present invention provides is than curve synoptic diagram, and its condition is in the situation that the initial GTG of the second color sub-pixels is zero GTG.Curve C 20 represents that display panel 110 compares curve in the color cross-talk of not carrying out crosstalk compensation.Curve C 30 represents that the color cross-talk of display panel 110 after carrying out crosstalk compensation compares curve.When curve C 40 compensates for corresponding curve C 30, adjacent the second color sub-pixels is in the compensated curve of zero GTG.
As shown in Figure 3, when display panel 110 is compensated, the color cross-talk of display panel 110, than curve (being curve C 30), obviously reduces, especially in low gray-scale areas.Thereby described compensation type of drive can reduce color cross-talk effectively, promote display frame quality.In addition, it is worth mentioning that, in the time that display panel 110 has compensated, its color cross-talk can have a slope variation than curve (being curve C 30), as square frame 200 indicates.For example, moreover in the region not compensating, the color cross-talk of display panel 110 is more identical with curve C 10 respective range than curve (being curve C 30) slope, 0 GTG～10 GTG and 200 GTG～255 GTGs.
Be noted that table 1 is only in order to illustrate a kind of look-up table of display device.Fig. 1 is only in order to illustrate a kind of implementing circuit of display panel 110.Fig. 2 is only in order to illustrate a kind of gray scale compensation matrix diagram of display device.Fig. 3 only for corresponding under a compensation way display panel color cross-talk ratio improve result.Therefore, table 1, Fig. 1, Fig. 2 and Fig. 3 are not in order to limit the present invention.
By the above embodiments, the present invention can summarize a kind of crosstalk compensation method of display panel, is applicable to the display device described in above-described embodiment.Described display device comprises display panel, backlight module and driver element.Described display panel can adopt the type of drive such as the reversion of N row, some reversion or row reversion, and the present embodiment does not limit.
Please refer to Fig. 4 and simultaneously with reference to Fig. 1, Fig. 4 illustrates the schematic flow sheet of the crosstalk compensation method of the display panel that the embodiment of the present invention provides.First,, in step S100, the deviser of display panel 110 can predetermine the gray scale compensation scope of corresponding the first color sub-pixels.Described gray scale compensation scope does not comprise the minimum gray scale of the first color sub-pixels and the high gray of the first color sub-pixels.Described gray scale compensation scope can be for example that the deviser of display panel 110 recently arranges according to the measured color cross-talk of display panel 110.Secondly,, in step S110, in the pre-reservoir 134 prior to driver element 130, set up a look-up table of the luminance compensation of color sub-pixels on corresponding display panel 110 (as red sub-pixel R, green sub-pixels G and blue subpixels).Look-up table can comprise the brightness value of color sub-pixels correspondence 0～i-1 GTG on display panel 110 and the offset of adjacent other color sub-pixels, and wherein i is the total grey exponent number of solid color sub-pixel institute tool, and i is positive integer.If solid color sub-pixel has 8 bit resolutions, i is 2
∧8=256 GTG, if solid color sub-pixel is 10 bit resolutions, is 2
∧10=1024 GTG, by that analogy.
Described reservoir 134 can utilize the volatility such as flash chip, ROM chip or random access memory chip or non-volatile memory chip to realize, but the present embodiment is not as limit.
Thereafter,, in step S120, time schedule controller 133, according to a view data, judges whether the GTG of the first color sub-pixels is positioned at gray scale compensation scope.If time schedule controller 133 judges the GTG of the first color sub-pixels and is positioned at gray scale compensation scope, performs step S130.If time schedule controller 133 judges the GTG of the first color sub-pixels and is positioned at outside gray scale compensation scope, performs step S170.
In step S130, according to this view data judge the initial GTG of the second color sub-pixels whether be greater than the second color sub-pixels maximum modified GTG.If time schedule controller 133 judges the initial GTG of the second color sub-pixels and is less than the maximum modified GTG of the second color sub-pixels, execution step S140.If time schedule controller 133 judges the initial GTG of the second color sub-pixels and is greater than the maximum modified GTG of the second color sub-pixels, execution step S170.
In step S140, search look-up table to obtain the offset of the second corresponding color sub-pixels, and utilize aforesaid interpolation method formula, formula (2) calculates the correction GTG of the second color sub-pixels.Then, in step S150, time schedule controller 133 according to the correction GTG of the GTG of the first color sub-pixels and the second color sub-pixels corresponding output control the GTG signal of the first color sub-pixels and the correction GTG signal of the second color sub-pixels to data drive circuit 132.Then, in step S160, data drive circuit 132 coordinates the activation time of scan drive circuit 131, and in output voltage, when driving the first color sub-pixels, synchronous output voltage is to drive the second color sub-pixels to carry out picture disply.Accordingly, to reduce the voltage difference between the second color sub-pixels and the first color sub-pixels and the color cross-talk ratio producing that is coupled.And in step S170, the initial GTG of the second color sub-pixels is made as correction GTG by time schedule controller 133, and perform step S150.
Crosstalk compensation method and the driver element thereof of the display panel that in sum, the embodiment of the present invention provides.The crosstalk compensation method of this display panel and driver element thereof can in drive display panel wherein a sub-pixels shows a GTG time, by adjusting the GTG brightness of another sub-pixels adjacent thereto, effectively eliminate the cross-talk between sub-pixels and another sub-pixels of vicinity, to reduce on display panel voltage and luminance difference between sub-pixels, and then promote the quality of overall display frame.
The foregoing is only embodiments of the invention, it is not in order to limit to the scope of the claims of the present invention.
Claims (10)
1. a crosstalk compensation method for display panel, is characterized in that, comprising:
In the time that the GTG of one first color sub-pixels is positioned at a gray scale compensation scope according to a view data, search a look-up table to obtain a corresponding offset, thereby according to described offset, one initial GTG of one second color sub-pixels is adjusted into a correction GTG; And
When the GTG of described the first color sub-pixels is positioned at outside described gray scale compensation scope according to described view data, maintain the GTG of described the second color sub-pixels in described initial GTG;
Wherein said gray scale compensation scope is greater than the minimum gray scale of described the first color sub-pixels and is less than the high gray of described the first color sub-pixels, and described look-up table has multiple offsets of each GTG of described the first color sub-pixels within the scope of corresponding described gray scale compensation;
Wherein, described the first color sub-pixels is adjacent with described the second color sub-pixels.
2. the crosstalk compensation method of display panel according to claim 1, it is characterized in that, described the second color sub-pixels has i GTG, and the described offset that is positioned at described gray scale compensation scope is arranged from small to large and is an ordered series of numbers, the maximum value of described ordered series of numbers is less than or equal to i/128 GTG, and wherein i is a positive integer.
3. the crosstalk compensation method of display panel according to claim 2, it is characterized in that, described offset increases progressively between the maximum value of described ordered series of numbers from the lower limit of described gray scale compensation scope, and described offset successively decreases between the upper limit of described gray scale compensation scope from the maximum value of described ordered series of numbers.
4. the crosstalk compensation method of display panel according to claim 1, is characterized in that, the step of adjusting the GTG of described the second color sub-pixels also comprises;
Judge according to described view data whether the described initial GTG of described the second color sub-pixels is greater than a maximum modified GTG of described the second color sub-pixels;
When the described initial GTG of described the second color sub-pixels is greater than if judge described maximum modified GTG, using described initial GTG as described correction GTG; And
In the time that the described initial GTG of described the second color sub-pixels is less than or equal to described maximum modified GTG, calculate described correction GTG with following formula:
Wherein said maximum modified GTG is more than or equal to the maximum value of the described offset within the scope of described gray scale compensation, and described maximum modified GTG is less than the high gray of described the second color sub-pixels.
5. the crosstalk compensation method of display panel according to claim 4, is characterized in that, the GTG of described the second color sub-pixels is ascending series, and described correction GTG is less than the high gray of described the second color sub-pixels.
6. a display device with crosstalk compensation, is characterized in that, comprising:
One display panel, has one first adjacent color sub-pixels and one second color sub-pixels; And
One driver element, there is time schedule controller, a data drive circuit and a reservoir, described data drive circuit receives the GTG signal that described time schedule controller is exported according to a view data, and accordingly described GTG signal is converted to magnitude of voltage, to drive described the first color sub-pixels and described second color sub-pixels of described display panel, and described driver element is in order to carry out the following step:
In the time that the GTG of described the first color sub-pixels is positioned at a gray scale compensation scope according to described view data, the described time schedule controller of described driver element is searched a look-up table to obtain a corresponding offset, thereby according to described offset, one initial GTG of described the second color sub-pixels is adjusted into a correction GTG; And
When the GTG of described the first color sub-pixels is positioned at outside described gray scale compensation scope according to described view data, the described time schedule controller of described driver element maintains described the second color sub-pixels in described initial GTG;
Wherein said gray scale compensation scope is greater than minimum gray scale and is less than high gray, and described look-up table is stored in described reservoir, and described look-up table has multiple offsets of the each GTG within the scope of corresponding described gray scale compensation.
7. display device according to claim 6, it is characterized in that, described the second color sub-pixels has i GTG, and the described offset that is positioned at described gray scale compensation scope is arranged from small to large and is an ordered series of numbers, and the maximum value of described ordered series of numbers is less than or equal to i/128 GTG, wherein i is positive integer.
8. display device according to claim 7, it is characterized in that, described offset increases progressively between the maximum value of described ordered series of numbers from the lower limit of described gray scale compensation scope, and described offset successively decreases between the upper limit of described gray scale compensation scope from the maximum value of described ordered series of numbers.
9. display device according to claim 6, is characterized in that, the step of adjusting described the second color sub-pixels GTG comprises;
Judge whether the described initial GTG of described the second color sub-pixels is greater than a maximum modified GTG of described the second color sub-pixels;
If judge when the described initial GTG of described the second color sub-pixels is greater than described maximum modified GTG, using described initial GTG as described correction GTG; And
If judge when the described initial GTG of described the second color sub-pixels is less than or equal to described maximum modified GTG, calculate described correction GTG with following formula:
Wherein said maximum modified GTG is more than or equal to the maximum value of the described offset within the scope of described gray scale compensation, and described maximum modified GTG is less than the high gray of described the second color sub-pixels.
10. display device according to claim 9, is characterized in that, the GTG of described the second color sub-pixels is ascending series, and described correction GTG is less than the high gray of described the second color sub-pixels.
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