CN101315745A - Image display system and its moire defect elimination method - Google Patents
Image display system and its moire defect elimination method Download PDFInfo
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- CN101315745A CN101315745A CNA2007101057276A CN200710105727A CN101315745A CN 101315745 A CN101315745 A CN 101315745A CN A2007101057276 A CNA2007101057276 A CN A2007101057276A CN 200710105727 A CN200710105727 A CN 200710105727A CN 101315745 A CN101315745 A CN 101315745A
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Abstract
The invention provides an image display system, not only discloses a method for collecting test data but also discloses various algorithms for eliminating the defect of cloud pattern; the invention does not need to change the structure of pixel and also large storage space is not needed; while the cloud pattern is eliminated, the algorithms disclosed by the invention can carry out dynamic adjustment for gamma parameters, white point setting and peak brightness according to the requirements of different users or different using environments and the difference from the traditional technique is that adjustment is needed to be carried out for the parameters by extra processes.
Description
Technical field
The present invention relates to a kind of image display system, particularly relate to a kind of method of eliminating the cloud pattern defects (mura defects) of display.
Background technology
Whether the driving of each pixel in the display, is whether the conducting by the film thin film field effect transistor TFT in the described pixel determines.Yet the characteristic electron of thin film field effect transistor TFT and the precision of technology are closely bound up.Any skew slightly of technology all will more or less change the characteristic electron of thin film field effect transistor TFT.Because the thin film field effect transistor TFT of each pixel is difficult to have consistent characteristic electron, so the luminous situation of all pixels of display and inconsistent.The shown picture of display has cloud pattern defects (muradefects).
A kind of traditional settling mode is dot structure for a change, directly the cloud pattern defects compensation system is added in the image element circuit, comprising a driven (voltage driving) mode and a current drives (current driving) mode.In this voltage driving mode, each pixel needs 5 thin film field effect transistor TFT at least, and only can compensate the threshold voltage (V of above-mentioned thin film field effect transistor TFT
Th) caused cloud pattern defects.In this current drives mode, each pixel needs 4 thin film field effect transistor TFT at least, and also bad to the compensation ability of low GTG value.The solution of this change dot structure usually needs more thin film field effect transistor TFT, not only influences aperture ratio of pixels (apertureratio), more is not suitable for being applied in (for example 2 o'clock QVGA or higher resolution) on the high-resolution display.Conventional art not only influences the characteristics of luminescence of pixel, also can increase the area of each pixel.
Another kind of known technology is external compensation technology (external compensation).U.S. Patent number U.S.6,911,781B2 directly adjusts the GTG value of pixel with the compensation cloud pattern defects according to test data.Yet, U.S.6,911,781B2 does not propose new technology and collects test data, does not also propose the algorithm of compensation cloud pattern defects time institute foundation.In addition, U.S.6,911,781B2 needs great memory span store test results.
Therefore, we need a kind of method of novelty to overcome the defective of above-mentioned conventional art.
Summary of the invention
The invention provides a kind of image display system, wherein, not only disclose a kind of method of collecting test data, more disclose the algorithm of multiple elimination cloud pattern defects.The present invention does not only need to change the structure of pixel, does not more need the large memories space.When eliminating cloud pattern defects, the disclosed algorithm of the present invention more can be simultaneously according to the requirement of different users or environment for use, advance to move dynamic adjustment at gamma parameter (Gamma setting), white point setting (white point) and peak brightness (peak brightness), if conventional art needs adjust above-mentioned parameter with extra flow process separately.
The disclosed image display system of the present invention comprises: a plurality of pixels, a storer and a special IC.This storer is to be used for storing a described pixel moire separately to compensate the row of entering a match.This special IC will read above-mentioned moire from this storer and compensate the row of entering a match.The moire compensation of each pixel is entered a match behind this special IC of row input, the function of this special IC will be the moire compensation letter formula group of this pixel, drive this pixel in order to an original GTG value is converted to moire elimination GTG value to replace this original GTG value.
Wherein, above-mentioned moire compensation is entered a match to be listed as and is produced by a parameter generator.This parameter generator comprises a plurality of sensing elements, a mean flow rate measuring appliance and a processing unit of corresponding described pixel.Above-mentioned sensing element will be distinguished the luminous situation of the above-mentioned pixel of sensing and produce a sensing data.After treating that this mean flow rate measuring appliance measures a mean flow rate of described pixel, this processing unit will convert the sensing data of described pixel to a brightness data respectively according to this mean flow rate.This processing unit will be tested the GTG value with at least one and test described pixel, and according to the relation of above-mentioned test GTG value and pairing brightness data, the above-mentioned moire compensation that estimates each pixel row of entering a match.
Eliminate in above-mentioned moire under the driving of GTG value, the cloud pattern defects of the display of this image display system will improve greatly.
For above and other objects of the present invention, feature and advantage can be become apparent, cited below particularlyly go out preferred embodiment, and conjunction with figs. elaborates.
Description of drawings
Fig. 1 is an embodiment of image display system of the present invention;
Fig. 2 produces a kind of algorithm that above-mentioned moire compensation is entered a match and is listed as with flow chart description;
How Fig. 3 drives a pixel with the pairing special IC of the algorithm of flow chart description Fig. 2
Fig. 4 produces the another kind of algorithm that above-mentioned moire compensation is entered a match and is listed as with flow chart description;
How Fig. 5 drives a pixel with the pairing special IC of the algorithm of flow chart description Fig. 4;
Fig. 6 produces the another kind of algorithm that above-mentioned moire compensation is entered a match and is listed as with flow chart description;
How Fig. 7 drives a pixel with the pairing special IC of the algorithm of flow chart description Fig. 6;
Fig. 8 produces the another kind of algorithm that above-mentioned moire compensation is entered a match and is listed as with flow chart description;
How Fig. 9 drives a pixel with the pairing special IC of the algorithm of flow chart description Fig. 8;
Figure 10 is the process flow diagram of one embodiment of the invention; And
Figure 11 is an one embodiment of the present invention.
The reference numeral explanation
The 102-picture element matrix; The 104-pixel;
106-image frame source; 108 (y
o)-original GTG value;
The 110-digital/analog converter; The 112-storer;
114-special IC (ASIC);
116-moire is eliminated GTG value (y
c); The 118-parameter generator;
Many sensing elements of 120-; 122-mean flow rate measuring appliance;
The 124-processing unit; The transmission line of 126-sensing data;
The 128-mean flow rate;
The 1100-electronic installation; The 1102-picture element matrix;
The 1104-display pannel; The 1106-input block;
The data-data signal line;
S202-collects under a plurality of test GTG values, the brightness data that a plurality of pixel produced;
S204-sets an index parameters n, and with y=ax
n+ bx
2+ cx+d simulates GTG value (y)-brightness (x) relation of above-mentioned pixel, asks its a, b, c and d;
The moire compensation that S206-is considered as above-mentioned pixel with n, a, b, c, with the d row of entering a match, and be stored in a storer;
S302-receives an original GTG value y
o
S304-with
Should original GTG value y
oBe converted to an expection brightness x
e
S306-is with y
c=ax
e n+ bx
E2+ cx
e+ d should expect brightness x
eBe converted to a moire and eliminate GTG value y
c
S308-exports this moire and eliminates GTG value y
cTo drive this pixel;
S402-collects under a plurality of test GTG values, the brightness data that a plurality of pixel produced;
S404-judges the index parameters of this pixel according to the position of above-mentioned pixel at display;
S406-is with y=ax
n+ bx+c simulates GTG value (y)-brightness (x) relation of above-mentioned pixel, asks its a, b and c;
The moire compensation that S408-is considered as above-mentioned pixel with n, a, b, with the c row of entering a match, and be stored in a storer;
S502-receives an original GTG value y
o
S504-with
Should original GTG value y
oBe converted to an expection brightness x
e
S506-is with y
c=ax
e n+ bx
e+ c should expect brightness x
eBe converted to a moire and eliminate GTG value y
c
S508-exports this moire and eliminates GTG value y
cTo drive this pixel;
S602-collects under a plurality of test GTG values, the brightness data x that a plurality of pixel produced
t
S604-with
With above-mentioned brightness data x
tConvert a required GTG value y respectively to
r
S606-asks above-mentioned test GTG value and pairing required GTG value y
rBetween a GTG value difference distance;
S608-is stored in a storer with above-mentioned GTG value difference distance;
S702-receives an original GTG value;
S704-judges the size of this original GTG value;
S706-selects the test GTG value of approximate this original GTG value, apart from this original GTG value of compensation, eliminates GTG value to calculate a moire with its pairing above-mentioned GTG value difference;
S802-collects under the test GTG value, the brightness data x that a plurality of pixel produced
t
S804-with
With above-mentioned brightness data x
tConvert a required GTG value y respectively to
r
S806-calculates this test GTG value and required GTG value y at each pixel
rBetween a GTG value difference distance;
S808-is stored in a storer with a plurality of proportion parameters and above-mentioned GTG value difference distance;
S902-receives an original GTG value;
S904-judges the size of this original GTG value;
S906-selects suitable proportion parameter according to the size of this original GTG value, and this proportion parameter be multiply by above-mentioned GTG value difference distance to produce a proportion GTG value difference distance;
S908-apart from this original GTG value of compensation, eliminates GTG value to calculate above-mentioned moire with this proportion GTG value difference;
S1002-captures the sensing data of each pixel;
S1004-measures a mean flow rate of described pixel;
S1006-is according to this mean flow rate, and the sensing data of each pixel is converted to brightness data;
S1008-estimates the characteristics of luminescence of each pixel according to the relation of test GTG value and brightness data, and the moire of exporting each pixel compensates the row of entering a match;
S1010-enters a match above-mentioned moire compensation to be listed as and is stored in a storer;
S1012-is according to producing the algorithm that is adopted when row are entered a match in above-mentioned moire compensation, design a special IC, being combined into above-mentioned pixel moire compensation letter formula group separately in order to the moire compensation of storing with this storer row of entering a match, is that a moire is eliminated the GTG value to change an original GTG value;
S1004-eliminates the GTG value with above-mentioned moire and drives above-mentioned pixel; And
The Scan-scan signal line.
Embodiment
Fig. 1 is an embodiment of image display system of the present invention.Comprise a plurality of pixels (detailed circuit that only shows a pixel 104 among the figure explains) in one picture element matrix 102 of this image display system.Thin film transistor (TFT) in this pixel 104 is after one scan signal wire scan conducting, and the magnitude of voltage on the data signal line data will write this pixel 104.In this embodiment, this pixel 104 is a 2T1C form, and this only is used for helping reader to understand the present invention, is not to be used for limiting the scope of the invention.The pixel of any other structure all can be applicable to the present invention.
Compared to direct input one digital/analog converters 110 of the GTG value signal 108 of the technology of a no moire compensation-image frame source 106 is exported, import this pixel 104-image display system of the present invention via this data signal line da ta and more comprise a storer 112 and a special IC (ASIC) 114 to produce a magnitude of voltage.The moire that these storer 112 storeies store up above-mentioned pixel compensates the row of entering a match.The GTG value signal 108 that this image frame source 106 is exported will be converted to signal 116 via this special IC 114 earlier before converting magnitude of voltage to.With pixel 104 is example, this special IC 114 after row are entered a match in the moire compensation that this storer 112 reads this pixel 104, the function equivalent one moire compensation letter formula group of this special IC 114.One original GTG value y of this pixel 104
oAfter these special IC 114 effects, will convert a moire to and eliminate GTG value y
c, in order to replace this original GTG value y
oImport this digital/analog converter 110.This moire is eliminated GTG value y
cTo convert magnitude of voltage to by this digital/analog converter 110, become the signal that drives this pixel 104.
The moire compensation that this storer 112 is stored is entered a match to be listed as and is produced by a parameter generator 118.This parameter generator 118 comprises sensing element 120, a mean flow rate measuring appliance 122 and a processing unit 124 of the described pixel of a plurality of correspondences.Described sensing element 120 will produce a sensing data respectively, via signal wire 126 these processing units 124 of input.Described sensing element can be a charge coupled cell (Charge Coupled Device, CCD) array, photomultiplier or galvanometer, its embodiment for example is: a plurality of sensitization coupling elements (Charge Coupled Device of one scan instrument, CCD), the above-mentioned sensing data that is produced is a relative GTG value, influenced by the depth of exposure of sensitization coupling element.Described sensing element also can be realized by a plurality of current sensors of the described pixel of correspondence.At this moment, above-mentioned sensing data is the pixel current value.Because the sensing data that above-mentioned sensing element produced not is a brightness value, compensate the row of entering a match if will produce above-mentioned moire, need additionally carry out complicated conversion.Therefore, the present invention more provides this mean flow rate measuring appliance 122, measures a mean flow rate 128 of described pixel.Based on this mean flow rate 128, this processing unit 124 converts the sensing data of described pixel to a brightness data (for example, unit is nits) respectively, to omit the needed complicated conversion of conventional art.
This mean flow rate measuring appliance 122 can be common on the market nitometer (or claiming brightness photometer), and measured mean flow rate (128) value is L
AVGAbove-mentioned sensing data is denoted as G.Along with the difference of the above-mentioned sensing element 120 that is adopted, above-mentioned sensing data G can be GTG value, photoelectron number or average current value.The mean value of the sensing data G of each pixel is denoted as G
AVGIn one embodiment, the computing formula of the brightness data L of a pixel is:
L＝L
AVG.(G/G
AVG)
r
Wherein, r one adjusts coefficient, will be according to the measured sensing data of sensing element and to some extent difference different with linear degree between the actual light intensity.
This processing unit 124 will be tested described pixel with a test GTG value at least.According to the relation of test GTG value and brightness data, this processing unit 124 will analyze the characteristics of luminescence of described pixel, and the above-mentioned moire that produces each pixel compensates the row of entering a match.
The present invention more tests the relation of GTG value and brightness data with multiple arthmetic statement.Different algorithms not only can produce different moire and compensate the row of entering a match, and above-mentioned ASIC Design is also along with algorithm changes.
The process flow diagram of Fig. 2 is for producing a kind of algorithm that above-mentioned moire compensation is entered a match and is listed as.Step S202 at first tests described pixel with a plurality of test GTG values, to obtain the brightness data that each pixel is produced under multiple test GTG value drives.Step 204 is set its index parameters n (for example, making n=1/ γ) according to a gamma parameter γ of each pixel.Based on the test result of step S202 gained, more with a GTG value-brightness relationship of each pixel of a curve fitting (curvefitting) technology rough estimate, the simulation letter formula that is adopted is as follows for step S204:
y＝a·x
n+b·x
2+c·x+d。(letter formula 1)
With arbitrary pixel is example, and y is for driving the GTG value of this pixel, and the brightness data that x is produced when GTG value y for this pixel, n are above-mentioned index parameters.A, b, c, calculate via curve fitting technique with the value of d after, will be stored in above-mentioned storer 112 together with this index parameters n, the above-mentioned moire compensation of forming this pixel row (step S206) of entering a match.
The gamma parameter of supposing all pixels is all identical, and then above-mentioned index parameters n is a definite value.With QVGA (Quarter VGA, 320 * 240 * RGBW) is example, this storer 112 is except storing above-mentioned index parameters n, an array of still needing, its size be 320 * 240 * 4 (using) * 4 for R, G, B and W pixel (for a, b, c, with the use of d parameter).
Among this embodiment, this special IC 114 must be made according to letter formula 1.To drive a certain pixel is example, and this special IC 114 will be by the moire compensation that this storer 112 reads this pixel enter a match row a, b, c, d and n.Specially after row a, b, c, d and n were entered a match in the above-mentioned moire compensation of special IC 114 receptions of design, the computing action was with equivalent moire compensation letter formula group.This moire compensation letter formula group comprises:
y
c＝a·x
e n+b·x
e 2+c·x
e+d。(letter formula 3)
Wherein, y
oOriginal GTG value for this pixel.x
eTo should original GTG value y
oOne the expection brightness.Letter formula 2 military orders should expection brightness x
eA peak brightness L of this pixel will be satisfied
PeakWith a gamma parameter γ.This original GTG value y
oTo convert a moire to by this moire compensation letter formula group (letter formula 2 and 3) and eliminate GTG value y
c
Fig. 3 drives the action of a certain pixel with this special IC 114 of flow chart description.This special IC 114 receives an original GTG value y at step S302
oAsk for this original GTG value y at step S304 with letter formula 2
oAn expection brightness x
eCalculate this expection brightness x at step S306 with letter formula 3
eA pairing moire is eliminated GTG value y
cIn step S308, this special IC 114 will be exported this moire and eliminate GTG value y
c, to replace this original GTG value y
oDrive this pixel.
Letter formula 2 (S304) military order the present invention more can satisfy the gamma parameter γ and the peak brightness L of each pixel simultaneously when eliminating the display cloud pattern defects
PeakBecause it is that peak brightness by shades of colour (red, green, blueness) pixel is determined that white point (white point) is set, so this picture system also can satisfy user's white point setting easily.This special IC 114 more can be above-mentioned gamma parameter γ and peak brightness L
PeakSpecial design output terminal, make this display system dispatch from the factory after, the user still can change its value voluntarily.
The process flow diagram of Fig. 4 is for producing the another kind of algorithm that above-mentioned moire compensation is entered a match and is listed as.Step S402 at first tests described pixel with a plurality of test GTG values, to obtain the brightness data that each pixel is produced under multiple test GTG value drives.This algorithm is divided into a plurality of blocks with a display, and each block will have different index parameters n according to its characteristic electron.Step 404 is set its index parameters n according to each pixel region.Based on the test result of step S402 gained, step S406 is with a GTG value-brightness relationship of each pixel of a curve fitting (curve fitting) technology rough estimate, and the emulation function that is adopted is:
y＝a·x
n+b·x+c。(letter formula 4)
With arbitrary pixel is example, and y is for driving the GTG value of this pixel, and the brightness data that x is produced when GTG value y for this pixel, n are the index parameters of this pixel.A, b, with after c calculates via curve fitting technique, will be stored in above-mentioned storer 112 together with this index parameters n, the above-mentioned moire compensation of forming this pixel row (step S408) of entering a match.
Compare with letter formula 1, the difference of letter formula 4 maximums is the selection of index parameters n.Analyze the characteristics of luminescence of a display, because the cause of the online ohm voltage drop of power supply, near can find to be positioned at the power lead pixel can be brighter.If can select suitable index parameters value at the characteristics of luminescence of the zones of different of display, can estimate the GTG value-brightness relationship of each pixel more accurately, and reduce the complexity of simulation letter formula, so letter formula 4 is simplified than letter formula 1, only need to calculate a, b, with three parameters of c, store the required byte number of each parameter simultaneously and also can descend.
A kind of method of setting each regional index parameters is as follows: according to the characteristics of luminescence of this display, this display is divided into a plurality of blocks; In above-mentioned block, sample; Calculate a sample index parameter of the pixel of being sampled, to estimate an average index parameter of each block; And make that above-mentioned average index parameter is the above-mentioned index parameters of pairing block.
With QVGA (Quarter VGA, 320 * 240 * RGBW) is example, the storer 112 of this embodiment will be stored each regional index parameters n, and a size (using) * 3 that are 320 * 240 * 4 for R, G, B and W pixel (for a, b, with the use of c parameter) array.Compare with the related embodiment of letter formula 1, this embodiment saves the massage storage space.
In the embodiment that adopts letter formula 4, this special IC 114 must be made according to letter formula 4.To drive a certain pixel is example, and this special IC 114 will be by the moire compensation that this storer 112 reads this pixel enter a match row a, b, c and n.The special IC 114 of this particular design receives above-mentioned moire compensation and enters a match behind row a, b, c and the n, and equivalent moire compensation letter formula group is moved in its computing.This moire compensation letter formula group comprises:
y
c＝a·x
e n+b·x
e+c。(letter formula 5)
y
oOriginal GTG value for this pixel.x
eFor to should original GTG value y
oOne the expection brightness.x
eA peak brightness L of this pixel will be satisfied
PeakWith a gamma parameter γ.This original GTG value y
oTo convert a moire to by this moire compensation letter formula group (letter formula 2 and 5) and eliminate GTG value y
c
Fig. 5 drives the action of a certain pixel with this special IC 114 of flow chart description.This special IC 114 receives an original GTG value y at step S502
oShould original GTG value y at step S504 with letter formula 2
oBe converted to an expection brightness x
eShould expect brightness x at step S506 with letter formula 5
eBe converted to a moire and eliminate GTG value y
cIn step S508, this special IC 114 will be exported this moire and eliminate GTG value y
c, to replace this original GTG value y
oDrive this pixel.
Similarly, letter formula 2 (S304) military order the present invention more can satisfy gamma parameter γ, the peak brightness L of this display simultaneously when eliminating the display cloud pattern defects
Peak, set with white point (white point).This special IC 114 more can be above-mentioned gamma parameter γ and peak brightness L
PeakSpecial design output terminal, make this display system dispatch from the factory after, the user still can change its value voluntarily.
The process flow diagram of Fig. 6 is for producing the another kind of algorithm that above-mentioned moire compensation is entered a match and is listed as.Step S602 at first tests described pixel with a plurality of test GTG values, to obtain the brightness data that each pixel is produced under multiple test GTG value drives.In step S604, above-mentioned brightness data will be converted into a required GTG value respectively:
Wherein, x
tBe above-mentioned brightness data, y
rRepresent this required GTG value.Letter formula 6 will guarantee that native system satisfies a peak brightness L of each pixel
PeakWith a gamma parameter γ.This processing unit 124 calculates above-mentioned test GTG value and pairing above-mentioned required GTG value y at step S606
rBetween a GTG value difference distance; And above-mentioned GTG value difference distance is stored in this storer 112 at step S608.With a certain pixel is example, and the pairing above-mentioned GTG value difference distance of the described test GTG value i.e. above-mentioned moire of this pixel compensates the row of entering a match.
Suppose that this embodiment adopts m test GTG value altogether.With QVGA (Quarter VGA, 320 * 240 * RGBW) is example, this storer 112 can be m array, its size is all 320 * 240 * 4 (using for R, G, B and W pixel).
Among this embodiment, this special IC 114 must comprise a totalizer (or subtracter).To drive a certain pixel is example, and Fig. 7 is with the action of this special IC 114 of flow chart description.This special IC 114 receives an original GTG value at step S702; Judge the size of this original GTG value at step S704; And, apart from this original GTG value of compensation, eliminate the GTG value to calculate a moire with its pairing above-mentioned GTG value difference in the test GTG value that step S706 selects approximate this original GTG value.This moire is eliminated the GTG value and will be replaced this original GTG value to drive this pixel.
Compare with above-mentioned other embodiment, this embodiment is calculating gamma parameter γ and the peak brightness L that considers each pixel when row are entered a match in above-mentioned moire compensation
Peak
Yet under the very not serious situation of the cloud pattern defects of display, in order more to save the usage space of storer, the present invention more proposes another kind of algorithm.Fig. 8 produces the process flow diagram that above-mentioned moire compensation is entered a match and is listed as for it.Step S802 only tests described pixel with a test GTG value.Described pixel will convert a required GTG value respectively to the brightness data that should test the GTG value in step S804:
Wherein, x
tBe above-mentioned brightness data, y
rRepresent this required GTG value.Letter formula 6 will guarantee that native system satisfies a peak brightness L of each pixel
PeakWith a gamma parameter γ.This processing unit 124 will calculate this test GTG value and required GTG value y at each pixel at step S806
rBetween a GTG value difference distance; And a plurality of proportion parameters and above-mentioned GTG value difference distance are stored in this storer 112 at step S808.With a certain pixel is example, the pairing above-mentioned GTG value difference of this test GTG value apart from the i.e. above-mentioned moire compensation of this pixel of the described proportion parameter row of entering a match.
Because this embodiment only adopts a test GTG value.With QVGA (Quarter VGA, 320 * 240 * RGBW) is example, this storer 112 only needs an array space 320 * 240 * 4 (using for R, G, B and W pixel) except needs are stored described proportion parameter.Compare with the described embodiment of Fig. 6, present embodiment will reduce the space requirement amount of this storer 112 greatly.
Among this embodiment, this special IC 114 also comprises a totalizer (or subtracter).To drive a certain pixel is example, and Fig. 9 is with the action of this special IC 114 of flow chart description.This special IC 114 receives an original GTG value at step S902; Judge the size of this original GTG value at step S904; Select suitable proportion parameter at step S906 according to the size of this original GTG value, and this proportion parameter be multiply by above-mentioned GTG value difference distance to produce a proportion GTG value difference distance.This special IC 114 will be at step S908 with this proportion GTG value difference apart from compensation this original GTG value, to calculate above-mentioned moire elimination GTG value.This moire is eliminated the GTG value and will be replaced this original GTG value to drive this pixel.
Figure 10 is a process flow diagram of the present invention.Step S1002 provides a plurality of sensing elements, and a plurality of pixels of a corresponding display produce a sensing data separately respectively.Step S1004 provides a mean flow rate measuring appliance, measures a mean flow rate of described pixel.Step S1006 provides a processing unit, according to this mean flow rate, converts the sensing data of described pixel to a brightness data respectively.Step S1008 tests described pixel with at least one test GTG value, and according to the relation of above-mentioned test GTG value and pairing brightness data, a moire that estimates each pixel compensates the row of entering a match.Step S1010 enters a match above-mentioned moire compensation to be listed as and is stored in the storer.Step S1012 produces the algorithm that is adopted when row are entered a match in above-mentioned moire compensation according to this processing unit, makes a special IC.This special IC will read the above-mentioned moire compensation row of entering a match from this storer, and be combined into a moire and compensate letter formula group with the above-mentioned moire compensation of each pixel row of entering a match respectively.The original GTG value that above-mentioned moire compensation letter formula group will be changed pairing pixel is that a moire is eliminated the GTG value.Step S1014 will eliminate the GTG value with above-mentioned moire and drive above-mentioned pixel.
Pixel of the present invention is except for the pixel of the same type, also can be dissimilar pixels.Full-color display for example, above-mentioned pixel can be categorized as redness, green, blueness even white polytype.Because it is " brightness data " that the present invention takes off the test data of getting, so need not develop the cloud pattern defects that compensating movement can improve full-color display easily separately at color of pixel.
Figure 11 diagram one electronic installation 600 is comprising a picture element matrix 1102, a display pannel 1104 and an input block 1106.This picture element matrix 1102 can be an active organic electroluminescent display (Active Matrix Organic Light Emitting Display, AMOLED).This input block 1106 couples this display pannel 1104, desires the image frame that shows with this display pannel 1104 with reception.
The scope of institute of the present invention desire protection comprises this display pannel 1104, and the mentioned pixel of the present invention can be formed this picture element matrix 1102.Storer that the present invention is mentioned and special IC are the part of this display pannel 1104.In addition, the scope of institute of the present invention desire protection more comprises this electronic installation 1100.This electronic installation 1100 can be a mobile phone, a digital camera, a PDA(Personal Digital Assistant), a mobile computer, a desktop PC, a televisor, an automobile and dials with a display or a portable disc and put device.
Though the present invention discloses as above with preferred embodiment; so it is not in order to limit scope of the present invention; anyly have the knack of this skill person; without departing from the spirit and scope of the present invention; when can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking the claim person of defining of the present invention.
Claims (15)
1. image display system, comprising:
A plurality of pixels;
One storer is stored a described pixel moire separately and is compensated the row of entering a match; And
One special IC, read above-mentioned moire from this storer and compensate the row of entering a match, and entering a match to be listed as with the moire compensation of each pixel respectively is combined into moire compensation letter formula group, is that a moire is eliminated the GTG value to drive this pixel with an original GTG value of changing pairing pixel;
Wherein, above-mentioned moire compensation is entered a match to be listed as and is produced by a parameter generator, and this parameter generator comprises:
A plurality of sensing elements, corresponding described pixel, and produce a sensing data respectively;
One mean flow rate measuring appliance is measured a mean flow rate of described pixel; And
One processing unit according to this mean flow rate, converts the sensing data of described pixel to a brightness data respectively;
Wherein, this processing unit will be tested the GTG value with at least one and test described pixel, and according to the relation of above-mentioned test GTG value and pairing brightness data, the above-mentioned moire compensation that estimates each pixel row of entering a match.
2. image display system as claimed in claim 1, wherein, this processing unit will be tested the above-mentioned brightness data of described pixel with a plurality of above-mentioned test GTG values, to estimate a described pixel GTG value-brightness relationship separately; And above-mentioned moire compensation letter formula group comprises an original GTG value-expection brightness transition, is expressed as follows with the letter formula:
Wherein,
y
oBe above-mentioned original GTG value;
L
PeakPeak brightness for this pixel;
γ is a gamma parameter of this pixel; And
x
eBe this original GTG value y
oSatisfy this peak brightness L
PeakExpection brightness with this gamma parameter γ.
3. image display system as claimed in claim 2, wherein, above-mentioned GTG value-brightness relationship is expressed as follows with the letter formula:
y＝a·x
n+b·x
2+c·x+d；
Wherein,
Y is for driving the GTG value of this pixel;
X is the brightness data of the corresponding GTG value of this pixel y;
N is an index parameters, by the above-mentioned gamma parameter decision of this pixel; And
A, b, c, with d will with the above-mentioned moire compensation that this index parameters n forms this pixel row of entering a match.
4. image display system as claimed in claim 3, wherein, above-mentioned moire compensation letter formula group more comprises an expection brightness-moire elimination GTG value conversion, is expressed as follows with the letter formula:
yc＝a·x
e n+b·x
e 2+c·x
e+d；
Wherein, y
cFor the above-mentioned moire of this pixel is eliminated the GTG value.
5. image display system as claimed in claim 2, wherein, above-mentioned GTG value-brightness relationship is expressed as follows with the letter formula:
y＝a·x
n+b·x+c；
Wherein,
Y is for driving the GTG value of this pixel;
X is the brightness data of the corresponding GTG value of this pixel y;
N is an index parameters, by the characteristics of luminescence decision of this pixel region on the display; And
A, b, with c will with the above-mentioned moire compensation that this index parameters n forms this pixel row of entering a match.
6. image display system as claimed in claim 5, wherein, the establishing method of above-mentioned index parameters comprises:
According to the characteristics of luminescence of this display, this display is divided into a plurality of blocks;
In above-mentioned block, sample;
Calculate a sample index parameter of the pixel of being sampled, to estimate an average index parameter of each block; And
Make that above-mentioned average index parameter is the above-mentioned index parameters of pairing block.
7. image display system as claimed in claim 5, wherein, above-mentioned moire compensation letter formula group more comprises an expection brightness-moire elimination GTG value conversion, is expressed as follows with the letter formula:
y
c＝a·x
e n+b·x
e+c；
Wherein, y
cFor the above-mentioned moire of this pixel is eliminated the GTG value.
8. image display system as claimed in claim 1, wherein, above-mentioned processing unit is more carried out a brightness data-required GTG value conversion to above-mentioned brightness data, is expressed as follows with the letter formula:
Wherein,
x
tBe above-mentioned brightness data;
L
PeakPeak brightness for this pixel;
γ is a gamma parameter of this pixel; And
y
rFor this pixel satisfies above-mentioned peak brightness L
PeakOne required GTG value of required input during with gamma parameter γ.
9. image display system as claimed in claim 8, wherein, above-mentioned processing unit more calculates the GTG value difference distance between above-mentioned test GTG value and the pairing above-mentioned required GTG value.
10. image display system as claimed in claim 9, wherein, the pairing above-mentioned GTG value difference distance of a plurality of above-mentioned test GTG values is that above-mentioned moire compensates the row of entering a match; And the performed action of above-mentioned moire compensation letter formula group more comprises:
Judge the size of this original GTG value; And
Select the test GTG value of approximate this original GTG value, apart from this original GTG value of compensation, eliminate the GTG value to calculate above-mentioned moire with its pairing above-mentioned GTG value difference.
11. image display system as claimed in claim 9, wherein, the relevant proportion parameter of size of pairing above-mentioned GTG value difference distance of a certain above-mentioned test GTG value and a plurality of and above-mentioned original GTG value is that above-mentioned moire compensates the row of entering a match; And the performed action of above-mentioned moire compensation letter formula group more comprises:
Judge the size of this original GTG value;
To multiply by above-mentioned GTG value difference distance to above-mentioned proportion parameter that should original GTG value, to calculate a proportion GTG value difference distance; And
Apart from this original GTG value of compensation, eliminate the GTG value with this proportion GTG value difference to calculate above-mentioned moire.
12. image display system as claimed in claim 1 more comprises a display pannel, comprising above-mentioned pixel, this storer and this special IC.
13. image display system as claimed in claim 12 more comprises an electronic installation, comprising:
The aforementioned display device panel; And
One input block couples this display pannel, desires the image frame that shows with this display pannel with reception.
14. image display system as claimed in claim 13, wherein, this electronic installation is that a mobile phone, a digital camera, a personal digital assistant, a mobile computer, a desktop PC, a televisor, an automobile are dialled with a display or a portable disc and put device.
15. image display system as claimed in claim 1, wherein, the formula of being followed when this processing unit is asked for above-mentioned brightness data is:
L＝L
AVG.(G/G
AVG)
r，
Wherein,
L
AVGFor above-mentioned mean flow rate,
G be above-mentioned sensing data,
G
AVGFor the mean value of the pairing above-mentioned sensing data of described pixel,
R one adjusts coefficient, is determined by a linear relationship of the actual luminous intensity of above-mentioned sensing data and institute's respective pixel.
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