CN102024440A - Method for compensating pixel voltage of display panel and framework - Google Patents
Method for compensating pixel voltage of display panel and framework Download PDFInfo
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- CN102024440A CN102024440A CN2011100068725A CN201110006872A CN102024440A CN 102024440 A CN102024440 A CN 102024440A CN 2011100068725 A CN2011100068725 A CN 2011100068725A CN 201110006872 A CN201110006872 A CN 201110006872A CN 102024440 A CN102024440 A CN 102024440A
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Abstract
The invention discloses a method for compensating a pixel voltage of a display panel and framework. The method comprises the following steps: building a pixel voltage compensation table in an inquiry window unit; deciding a compensated gray scale of a pixel to be compensated by a sequential control unit according to the pixel voltage compensation table; transmitting the compensated gray scale to a source electrode controller by the sequential control unit; corresponding the compensated gray scale to a compensated voltage by the source electrode controller; and outputting the compensated voltage to the pixel to be compensated by the source electrode controller.
Description
Technical field
The invention relates to a kind of voltage compensating method, particularly about the pixel voltages compensation method of many open-shelfs of sweep trace structure display panel.
Background technology
Because traditional LCD itself can be not luminous voluntarily, therefore the place of light source deficiency outside must use the mode of illumination to come luminous.For example, the LCD of wrist-watch uses simple miniature bulb as illumination; Employed LCD such as automobile ammeter or OA terminating machine are luminous by the lighting source at rear, just can obtain distinct demonstration.These use the mode of slim white light source to be called (Back Light) backlight overleaf.General LCD is to utilize colored filter to filter light source, makes single picture element show trichromatic composition simultaneously, to show required color.In the LCD of this kind tool colored filter, each picture element all is to be combined by three sub-picture elements (sub-pixel), to correspond to red, the green and blue color filter of colored filter respectively, and human eye receives light source shown red, green and blue light that goes out after by colored filter, it can be mixed, and then perception gets the color of this picture element.Yet the colorized optical filtering sector-meeting influences the light transmittance of LCD integral body, and in addition, colored filter also influences display dot (dot) size of the single picture element of LCD, causes the resolution of LCD to be subjected to the restriction of colored filter.
A kind of look preface method (Color Sequential) LCD in order to improve problems such as above-mentioned resolution and light transmittance, to develop then now.Color sequential liquid crystal display can show three former colour contents of a picture element in regular turn and present color.Each picture element of this kind color sequential liquid crystal display is by three light emitting sources, send red, green respectively and blue light with as backlight.In time, this picture element can be according to red, the green and blue light of the corresponding respectively unlatching of video data at a picture frame.Utilize the persistence of vision of human eye, the people can pick out the color of this picture element.Therefore, color sequential liquid crystal display need not be provided with colored filter, and,, and can improve resolution so color sequential liquid crystal display can reduce cost because the size of each picture element of color sequential liquid crystal display is less than each picture element of the LCD of tool colored filter.
The picture element of color sequential liquid crystal display is scanning signal and the data signals that produces according to its control circuit, and show image.In addition, each picture element of this kind color sequential liquid crystal display must be by the three primary colors light emitting source, respectively at same picture frame send red, green and blue light with as backlight, to demonstrate chromatic image, therefore each scanning signal needed must scan each colour backlight source in the demonstration time of each picture frame, so the sweep velocity of color sequential liquid crystal display (or frequency) must be promoted to 3 times of conventional liquid crystal.
In order to solve the required high frequency problem of color sequential liquid crystal display, the panel framework that a kind of sweep trace is opened more in response to and give birth to.Particularly, be that the multi-strip scanning line is opened simultaneously and closed simultaneously, the therefore online picture element of switch multi-strip scanning simultaneously, and then promote the sweep frequency of panel.Particularly, the framework of opening with sweep trace three is an example, if the picture element quantity in the panel is identical with conventional architectures, and the switching time of sweep trace is identical with conventional architectures, because three online picture elements of scanning of three-open type framework open and close simultaneously, and the conventional liquid crystal online picture element of one of open and close scanning once, therefore, under the identical time, the picture element amount that sweep trace three open-shelf structures can scan is three times of conventional architectures, so its time of scanning all picture elements only is 1/3rd of conventional architectures, therefore, its sweep frequency can promote 3 times into conventional architectures.So the framework that utilizes sweep trace to open can effectively promote the sweep frequency of display more, and then the display quality of lifting color sequential liquid crystal display.
Only, the problem of picture element capacitive coupling amount inequality easily takes place in many open-shelfs of sweep trace structure, if be used for color sequential liquid crystal display, easily produces tangible colored gridiron pattern phenomenon, if be used for general LCD, then easily causes the problem of film flicker.Particularly, can consult shown in Figure 1, Fig. 1 is a kind of sweep trace three open-shelf structures, learn by observing among the figure, in the time of t1 to t2, sweep trace G2, G3, and G4 can open at t1 simultaneously, close at t2 simultaneously, sweep trace G1 is then permanent in closing, and because sweep trace G2, G3, and G4 from moment of reaching the pass under the situation of charge conservation, electric charge on the pixel electrode no longer stays into data line, then can cause the generation of capacitance coupling effect, this effect can be reflected on the stray capacitance Cpg between picture element and the sweep trace, and then influence the display voltage of picture element, as seen from Figure 1, because sweep trace G1 is permanent in closing, so capacitor C pg1 will not have the problem of capacitance coupling effect, and sweep trace G2 can transfer to from unlatching and closing, so Cpg2 can produce capacitance coupling effect, therefore the first display voltage Vdisp1 can be subjected to being coupled to the capacitor C pg2 influence of sweep trace G2, in like manner as can be known, the capacitor C pg3 that the second display voltage Vdisp2 then can be subjected to being coupled to the capacitor C pg2 ' of sweep trace G2 and be coupled to sweep trace G3 influences, and the capacitor C pg4 that the 3rd display voltage Vdisp3 can be subjected to being coupled to the capacitor C pg3 ' of sweep trace G3 and being coupled to sweep trace G4 influences.From the above, the first display voltage Vdisp1 only is subjected to the influence of a stray capacitance, the second display voltage Vdisp2 and the 3rd display voltage Vdisp3 then are subjected to the influence of two stray capacitances, so Vdisp1 is subjected to the influence of capacitance coupling effect less, and then cause the asymmetric degree varies of three picture element display voltage to cause, the difficulty that causes common electrode voltage to adjust, can't restrain in order to do making common electrode voltage, and then cause colored gridiron pattern phenomenon at color sequential display, cause phenomenon of picture flicker in general LCD.
Because the asymmetric degree varies of the different picture element display voltage that cause of capacitive coupling amount causes.If the point of collocation colour field is changed the adjustment mode of electrode voltage together, can cause the former picture of GTG that should show to be shown as colored gridiron pattern, for example, its three kinds common illustrative aspects are shown in first aspect, second aspect and the elicit illness state sample of Fig. 2 respectively, wherein, when common electrode voltage is adjusted to first aspect, can make the display voltage Vdisp1 symmetry of winning, and then can show normal GTG, yet the second display voltage Vdisp2 and the 3rd display voltage Vdisp3 then still can't be symmetrical, and can't show normal GTG; If when common electrode voltage is adjusted to second aspect, though can make the second display voltage Vdisp2 and the 3rd display voltage Vdisp3 symmetry, cause the first display voltage Vdisp1 can't symmetry, and can't show normal GTG.Therefore, the picture of first aspect and second aspect can produce colored tessellated phenomenon because of the display voltage of part picture element is asymmetric, and then cause the horizontal stripe sense of picture, therefore so obvious for colored tessellated phenomenon and horizontal stripe sense are not had, select the common electrode voltage of compromise elicit illness state sample to adjust mode, but colored gridiron pattern phenomenon still exist.
In sum, in known many open-shelfs of sweep trace structure, still there are some difficulties and shortcoming, with to be overcome.
Summary of the invention
For overcoming above-mentioned difficulty and shortcoming, the invention provides a kind of compensation method of pixel voltages, especially for the pixel voltages compensation method of many open-shelfs of sweep trace structure.
A purpose of the present invention is in color sequential liquid crystal display, improves colored gridiron pattern phenomenon and horizontal stripe sense that many open-shelfs of sweep trace structure is caused.
Another order of the present invention is in general LCD, improves film flicker and the residual problem of direct current that many open-shelfs of sweep trace structure is caused.
In order to achieve the above object, the invention provides a kind of pixel voltages compensation method that is used for panel, wherein, above-mentioned panel has plural picture element group, each above-mentioned plural picture element group comprises one first picture element and other picture element of plural number, step of the present invention comprises: at first, utilize one to look into forms unit (look up table unit) and set up a pixel voltages compensation meter; Then, utilize a sequential control module to determine a compensation back GTG value of above-mentioned first picture element according to above-mentioned pixel voltages compensation meter; Then, utilize above-mentioned timing control unit with above-mentioned compensation after the GTG value be sent to the one source pole controller; Come again, utilize above-mentioned source electrode controller with above-mentioned compensation after the GTG value correspond to a compensation back voltage; At last, utilize above-mentioned source electrode controller with above-mentioned compensation after voltage export above-mentioned first picture element to.Wherein, above-mentioned first picture element and plural number gate line that other picture element couples are all opened simultaneously and are closed, that is the framework opened of sweep trace more.The disclosed pixel voltages compensation meter of the present invention is to see through following method to set up, and its step is as described below: at first, set one second common electrode voltage, make other picture element be GTG; Then, set one first common electrode voltage, make first picture element be GTG; Then, the difference with above-mentioned first common electrode voltage and the above-mentioned second common electrode voltage is defined as a bucking voltage; Come again, the display voltage of first picture element is deducted above-mentioned bucking voltage, to obtain a compensation back voltage; At last, voltage after the above-mentioned compensation is corresponded to GTG value after the above-mentioned compensation.In the method, the second common electrode voltage is the common electrode voltage that is decided to be after the convergence, that is the common electrode voltage of whole front panel, so except first picture element, other picture element all is GTG, therefore, the problem that desire solves is how to make first picture element also to be GTG.By said method, the present invention can be at the positive polarity and the reverse voltage of each GTG value of first picture element, set GTG value after the compensation of a correspondence respectively, to set up the pixel voltages compensation meter, then, compensate back GTG value to the source electrode controller by timing control unit according to this pixel voltages compensation meter output, produce after the corresponding compensation voltage and be sent to first picture element by the source electrode controller again, make the picture element of winning be GTG, and because other picture element all is GTG, so the problem of can prevent colored gridiron pattern phenomenon and film flicker.
Said method is to do voltage compensation at each picture element group's first picture element, and in like manner, the present invention also can do voltage compensation at other picture element of each picture element group, and its step is as described below: at first, utilize one to look into forms unit and set up a pixel voltages compensation meter; Then, utilize a sequential control module to determine a compensation back GTG value of above-mentioned other picture element of plural number according to above-mentioned pixel voltages compensation meter; Then, utilize above-mentioned timing control unit with above-mentioned compensation after the GTG value be sent to the one source pole controller; Come again, utilize above-mentioned source electrode controller with above-mentioned compensation after the GTG value correspond to a compensation back voltage; At last, utilize above-mentioned source electrode controller with above-mentioned compensation after voltage export other picture element of above-mentioned plural number to.In the method, the first common electrode voltage is the common electrode voltage that is decided to be after the convergence, that is the common electrode voltage of whole front panel, so only there is first picture element among every picture element group to be GTG, therefore, the problem that desire solves is how to make other picture element also to be GTG.By said method, the present invention can be at the positive polarity and the reverse voltage of each GTG value of other picture element of plural number, set GTG value after the compensation of a correspondence respectively, to set up the pixel voltages compensation meter, then, by timing control unit according to the exportable compensation of this pixel voltages compensation meter back GTG value to the source electrode controller, voltage is sent to other picture element of plural number after producing a corresponding compensation by this, make other picture element of plural number be GTG, and because first picture element all is GTG among each picture element group, so the problem of can prevent colored gridiron pattern phenomenon and film flicker.
In another viewpoint of the present invention, a kind of panel framework more is provided, it comprises: a pair of haplotype data transfer rate SDRAM (Synchronous dynamic random access memory) (DDR SRAM), in order to handle image signal; One sequential control module is coupled to above-mentioned Double Date Rate SDRAM (Synchronous dynamic random access memory), and receives above-mentioned image signal; One looks into forms unit, is coupled to above-mentioned timing control unit, and wherein, the above-mentioned forms unit that looks into has a pixel voltages compensation meter, in order to define at least one compensation back GTG value; The one source pole controller is coupled to above-mentioned timing control unit, receiving above-mentioned at least one compensation of being exported by above-mentioned timing control unit GTG value afterwards, and exports plural source electrode signal to the complex data line; And a gate controller, be coupled to above-mentioned timing control unit, to export plural gate signal to plural sweep trace; Wherein, above-mentioned plural source electrode signal comprises at least one compensation back voltage, its be by above-mentioned source electrode controller according to above-mentioned compensation after the decision of GTG value.By this, panel framework of the present invention can will compensate the picture element that back voltage reaches each desire compensation according to the pixel voltages compensation meter, make it be GTG, and then the problem of prevent colored gridiron pattern phenomenon and film flicker.
The above be in order to illustrate purpose of the present invention, reach this purpose technological means, with and the advantage that produces or the like.And the present invention can and follow back accompanying drawing formula and claim to make the reader be able to clearly more understand from the narration of following preferred embodiment.
Description of drawings
Fig. 1 shows known sweep trace three open-shelf structures;
The tessellated three kinds of aspects of Fig. 2 display color;
Fig. 3 shows the preferred embodiment of panel framework of the present invention;
Fig. 4 shows that the present invention is used for the most preferred embodiment of the pixel voltages compensation method of panel;
Fig. 5 shows that the present invention sets up an embodiment of pixel voltages compensation meter;
Fig. 6 shows the specific embodiment of pixel voltages compensation meter of the present invention;
Fig. 7 shows that the present invention is used for another embodiment of the pixel voltages compensation method of panel;
Fig. 8 shows that the present invention sets up another embodiment of pixel voltages compensation meter.
[primary clustering symbol description]
101 treating apparatus
102 sequential control circuit plates
103 connectors
104 picture buffer
The integrated circuit of 105 special applications
106 Double Date Rate SDRAM (Synchronous dynamic random access memory)
107 look into forms unit
108 timing control units
109?Gamma?IC
110 gate controllers
111 source electrode controllers
112 display panels
The 201-205 step
The 301-306 step
The 401-405 step
The 501-506 step
G1, G2, G3, G4 sweep trace
Cpg1, Cpg2, Cpg2 ', Cpg3, Cpg3 ', Cpg4 stray capacitance
Vdisp1 first display voltage
Vdisp2 second display voltage
Vdisp3 the 3rd display voltage
T1 sweep trace G2, G3, G4 opening time
T2 sweep trace G2, G3, G4 shut-in time.
Embodiment
The present invention will be narrated with preferred embodiment and viewpoint, and this type of narration is to explain structure of the present invention and step, only in order to explanation but not in order to limit claim of the present invention.Therefore, the preferred embodiment in instructions, the present invention also can extensively be rendered among other embodiment.
The present invention discloses a kind of pixel voltages compensation method that is used for panel, it is by construction one pixel voltages compensation meter, and utilize lookup table mode to carry out the action of voltage compensation at the picture element of display voltage mistake by timing control unit, use the display voltage of the picture element that changes the display voltage mistake, thereby make this picture element present the GTG that desire shows, and then prevent colored gridiron pattern and phenomenon of picture flicker.The applicable panel of the present invention can comprise, but is not limited to color sequential liquid crystal display.
Illustrate that at first the present invention is in order to carry out the panel framework of pixel voltages compensation method, see also shown in Figure 3, this figure is the preferred embodiment that discloses panel framework of the present invention, it comprises a treating apparatus 101, one sequential control circuit plate 102, a connector 103, one picture buffer (frame buffer) 104, one Application Specific Integrated Circuit 105 (application specific integrated circuit, Asic), a pair of haplotype data transfer rate SDRAM (Synchronous dynamic random access memory) (DDR SRAM) 106, one looks into forms unit 107, one sequential control module 108, one Gamma IC 109, one gate controller 110, an one source pole controller 111 and a display panel 112.Above-mentioned treating apparatus 101 can comprise, but be not limited to, arithmetic processing apparatus such as computing machine or mobile computer, its purpose is to transmit the raw video signal and gives sequential control circuit plate 102, and sequential control circuit plate 102 comprises connector 103, picture buffer 104, Application Specific Integrated Circuit (Asic) 105, reaches Gamma IC109.Above-mentioned Application Specific Integrated Circuit (Asic) 105 more comprises DDR control module 106, looks into forms unit 107, reaches sequential control module 108.Connector 103 is that electrical couplings is to treating apparatus 101, to receive the raw video signal, particularly, can utilize eDP cable to connect this connector 103 transmits to carry out signal with treating apparatus 101, can transmit it to the DDR control module 106 in the Application Specific Integrated Circuit 105 behind the connector 103 reception raw video signals, and can reaching the raw video signal that is received picture buffer 104, this DDR control module 106 rearranges, and the image signal of DDR control module 106 after thereupon will rearranging read back, and be transmitted to timing control unit 108.Look into forms unit 107 and have a pixel voltages compensation meter, it can set up data or the data that are made of original GTG value, primary voltage, desire bucking voltage, compensation back voltage and compensation back GTG value at the picture element of any desire bucking voltage, the purpose of this compensation meter is to adjust because of the uneven picture element that causes the display voltage mistake of capacitive coupling amount, its correct display voltage is provided, make it show correct GTG, and then overcome film flicker, and colored tessellated problem.About the detailed technology content of this pixel voltages compensation meter, will chat bright in addition in this instructions further part.And timing control unit 108 is to be coupled to gate controller 110 and source electrode controller 111, and it is in order to source electrode signal and gate pole signal are offered source electrode controller 111 and gate pole controller 110 respectively.Particularly, the source electrode signal is a mini low voltage differential signal (mini-LVD), and the gate signal comprises start signal (STV) and baseband signal (CKV).Then, source electrode controller 111 exports the source electrode signal to the complex data line again, 110 of gate controllers export the gate signal to plural sweep trace, use the display voltage and the switching time of all picture elements in the decision display panel 112, wherein, the source electrode signal comprises at least one compensation back voltage, it is that the GTG value is determined after the compensation that is transmitted according to timing control unit 108 by source electrode controller 111, in order to adjust because of the uneven picture element that causes the display voltage mistake of capacitive coupling amount, make it show correct GTG, and then prevent colored gridiron pattern and phenomenon of picture flicker.Gamma IC 109 is in order to the pairing voltage of decision picture element GTG value, and be to send source electrode controller 111 to this corresponding closing, for example, 30 pairing voltages of GTG value of definable first picture element in Gamma IC, and be to transfer in the source electrode controller 111 with this corresponding closing, source electrode controller 111 then can calculate the pairing voltage of all GTG values according to the corresponding relation of above-mentioned 30 GTG values, and this technology is not feature of the present invention place, will not give unnecessary details in detail in this paper.
See also shown in Figure 4, this figure discloses and the present invention is based on the preferred embodiment that above-mentioned framework is applied to the compensation method of panel pixel voltages, wherein, the panel that this method was suitable for is preferably many open types of sweep trace framework, it comprises, but be not limited to, sweep trace three opens, four open, five open ... N opens or the like.Particularly, this panel has plural picture element group, each picture element group comprises one first picture element and other picture element of plural number, for example, if sweep trace is three open-shelf structures, then other picture element is two, if sweep trace four open-shelf structures, it is three that three other picture element numbers are then arranged, and the rest may be inferred, as can be known if sweep trace is a N open-shelf structure, (N-1) individual other picture element is then arranged, palpus attention person, the gate line that above-mentioned first picture element and other picture element connected is for opening simultaneously and closing, and the panel common electrode voltage of present embodiment is to be set at the voltage that can make other picture element display voltage symmetry, even also other picture element of plural number shows the voltage of correct GTG, for example, under sweep trace three open-shelf structures, can make the 2nd, 3 picture element display voltage symmetries are as shown in second aspect among Fig. 2.Under this aspect, the purpose of present embodiment is to make the display voltage of the 1st picture element also to be symmetry, its step is as described below: at first, consult Fig. 4, in step 201, the pixel voltages compensation meter that forms unit sets up is in advance looked in utilization, make and to look into the picture element that forms unit can corresponding any desire bucking voltage, positive polarity and reverse voltage at all GTG values are set up by original GTG value, primary voltage, desire bucking voltage, data or data form that compensation back voltage and compensation back GTG value are constituted, its purpose is to adjust because of the uneven picture element that causes the display voltage mistake of capacitive coupling amount, its correct display voltage is provided, make it show correct GTG, and then overcome film flicker, and colored tessellated problem.In present embodiment, be to set up this pixel voltages compensation meter at the positive polarity voltage and the reverse voltage of each GTG value of first picture element; Then, in step 202, utilize timing control unit to determine GTG value after the compensation of first picture element according to the pixel voltages compensation meter.Particularly, when desire is controlled first picture element and is shown first GTG, 88 GTGs under the positive polarity voltage for example, its original GTG value is 88, then timing control unit can be inquired about original GTG value 88 pairing compensation back GTG values in the pixel voltages compensation meter, 100 GTGs under the positive polarity voltage for example, then the GTG value after the compensation is 100; Then, in step 203, utilize timing control unit will compensate back GTG value and be sent to the source electrode controller, wherein this compensation back GTG value promptly is by the resulting value of timing control unit inquiry pixel voltages compensation meter, for example above-mentioned 100.Then, in step 204, utilize the source electrode controller will compensate back GTG value and correspond to compensation back voltage, particularly, because the corresponding relation that has each GTG value and corresponding voltage in the source electrode controller, so it receives resulting any GTG value, all but corresponding conversion is a voltage, so can in the source electrode controller, be a magnitude of voltage with GTG value corresponding conversion after the compensation of timing control unit transmission, and this magnitude of voltage be compensation back voltage.At last, in step 205, utilize the source electrode controller to export first picture element to, and then change the display voltage of first picture element, make it can show correct GTG, thereby prevent colored gridiron pattern, phenomenon of picture flicker by the resulting compensation of step 204 back voltage.
Then can consult Fig. 5 about setting up pixel voltages compensation meter method, this figure discloses the embodiment that the present invention sets up the pixel voltages compensation meter, its step is as described below: at first, in step 301, set an original GTG value, it is because the pixel voltages compensation meter is at voltage and compensation back GTG value after the positive polarity of each GTG value of first picture element and the compensation that reverse voltage is set up a correspondence, be a selected original GTG value n so set up the first step of this table, with 8 256 GTGs is example, and n comprises 0, the integer of 1-255; Then, after the selected good original GTG value, promptly enter in the step 302, set one second common electrode voltage V
Com2, be GTG in order to do other picture element that makes each picture element group, for example, if sweep trace three open-shelf structures, will be shown in second aspect of Fig. 2, the 2nd, 3 picture element is to show GTG.In addition, and with this second common electrode voltage V
Com2Set the common electrode voltage of panel for this reason.Then, in step 303, with the second common electrode voltage V
Com2Be adjusted into the first common electrode voltage V
Com1, make each picture element group's first picture element be GTG, for example, if sweep trace three open-shelf structures, will be shown in first aspect of Fig. 2, the 1st picture element is to show GTG; Then, in step 304, the difference of the first common electrode voltage and the second common electrode voltage is defined as a bucking voltage, the absolute value of its preferable difference for this reason, can consult Fig. 6 in the lump in this, it shows the specific embodiment of pixel voltages compensation meter of the present invention, and it is to be example with 8 256 GTGs, wherein, bucking voltage be △ V (n)=| V
Com1-V
Com2|; Then, in step 305, the display voltage of first picture element is deducted bucking voltage,, be first picture element and deduct above-mentioned bucking voltage △ V (n) in the display voltage V of n GTG (n) to be compensated back voltage, that is V (n)-△ V (n); At last, in step 306, voltage after the above-mentioned compensation is corresponded to a corresponding GTG value, can be compensated back GTG value gray (n), after this compensation back GTG value storage, then get back in the step 301, other GTG values (for example next GTG value n+1) are repeated the step of 302-306.By said method, can obtain the pairing compensation back voltage of each GTG value and the compensation back GTG value of first picture element, for example: original GTG value n=88, the computing of this table of process can be compensated back GTG value gray (88)=100.
Above embodiment all is that first picture element at plural picture element group carries out voltage compensation, for example, and the 1st, 4,7 picture element of sweep trace three open-shelf structures.Yet, in another embodiment of the present invention, also can carry out voltage compensation at other picture element of plural picture element group, for example, the 2nd, 3,5,6 or 7,8 picture element of sweep trace three open-shelf structures.Can consult shown in Figure 7 at this, this figure discloses another embodiment that the present invention is used for the pixel voltages compensation method of panel, wherein, the panel common electrode voltage of present embodiment is to be set at the voltage that can make the first picture element display voltage symmetry, even also first picture element shows the voltage of correct GTG, for example, under sweep trace three open-shelf structures, can make the 1st picture element display voltage symmetry, shown in first aspect among Fig. 2.Therefore, under this aspect, the purpose of present embodiment is the 2nd, the display voltage of 3 picture elements is done compensation, be symmetry, its step is as described below: at first, in step 401, utilization is looked into forms unit and is set up a pixel voltages compensation meter, particularly, is to set up this pixel voltages compensation meter at the positive polarity and the reverse voltage of all GTG values of other picture element, wherein, other above-mentioned picture element is meant among each picture element group, all picture elements except first picture element, and for example: under the sweep trace three open-shelf structures is the 2nd, 3 picture elements, under the sweep trace four open-shelf structures is the 2nd, 3,4 picture elements, by that analogy; Then, in step 402, utilize timing control unit to determine GTG value after the compensation of other picture element according to the pixel voltages compensation meter, particularly, when desire is controlled other picture element and is shown a certain GTG, 88 GTGs under the positive polarity voltage for example, its original GTG value is 88, then timing control unit can be inquired about original GTG value 88 pairing compensation back GTG values in the pixel voltages compensation meter, 100 GTGs positive polarity voltage under for example, and the GTG value after then compensating is 100; Then, in step 403, utilize timing control unit will compensate back GTG value and be sent to the source electrode controller; Then, in step 404, utilize the source electrode controller will compensate back GTG value and correspond to compensation back voltage, particularly, being in the source electrode controller, be a magnitude of voltage with GTG value corresponding conversion after the compensation of timing control unit transmission, and this magnitude of voltage is compensation back voltage; At last, in step 405, utilize the source electrode controller to export other picture element to, and then change the display voltage of other picture element, make it can show correct GTG, thereby prevent colored gridiron pattern, phenomenon of picture flicker by the resulting compensation of step 404 back voltage.
About how setting up the pixel voltages compensation meter of other picture element, can consult shown in Figure 8ly, its step is as described below: at first, in step 501, setting an original GTG value n, is example with 8 256 GTGs, n comprises 0, the integer of 1-255; Then, after the selected good original GTG value, promptly enter in the step 502, set one first common electrode voltage V
Com1, make each picture element group's first picture element be GTG, for example, if sweep trace three open-shelf structures, will be shown in first aspect of Fig. 2, the display voltage symmetry of its 1st picture element is GTG.In addition, and with this first common electrode voltage V
Com1Set the common electrode voltage of panel for this reason.Then, in step 503, with the first common electrode voltage V
Com1Be adjusted into the second common electrode voltage V
Com2, make other picture element of each picture element group be GTG, for example, if sweep trace three open-shelf structures, will be shown in second aspect of Fig. 2, wherein the display voltage symmetry of the 2nd, 3 picture element is GTG; Then, in step 504, the difference of the first common electrode voltage and the second common electrode voltage is defined as a bucking voltage, the absolute value of its preferable difference for this reason can and be consulted Fig. 6 in this, and it shows the specific embodiment of pixel voltages compensation meter of the present invention, wherein, bucking voltage be △ V (n)=| V
Com1-V
Com2|; Then, in step 505, the display voltage of other picture element is deducted bucking voltage,, be other picture element and deduct above-mentioned bucking voltage △ V (n) in the display voltage V of n GTG (n) to be compensated back voltage, that is V (n)-△ V (n); At last, in step 506, voltage after the above-mentioned compensation is corresponded to a corresponding GTG value, can be compensated back GTG value gray (n), after this compensation back GTG value storage, then get back in the step 501, other GTG values (for example next GTG value n+1) are repeated the step of 502-506.By said method, can obtain the pairing compensation back voltage of each GTG value and the compensation back GTG value of other picture element.
Above-mentioned narration is to be preferred embodiment of the present invention.The skill person in this field is deserved to be in order to explanation the present invention but not in order to limit the patent right scope that the present invention was advocated to understand it.Its scope of patent protection when on accompanying claim and etc. same domain decide.All skill persons who is familiar with this field, in not breaking away from this patent spirit or scope, change of being done or retouching all belong to the equivalence of being finished under the disclosed spirit and change or design, and should be included in the following claim.
Claims (13)
1. the pixel voltages compensation method of a display panel, this panel has plural picture element group, and each should plural number picture element group comprise one first picture element and other picture element of plural number, it is characterized in that its step comprises:
Look in one and to set up a pixel voltages compensation meter in the forms unit;
Determine GTG value after the compensation of this first picture element with a sequential control module according to this pixel voltages compensation meter;
Should compensate back GTG value by this timing control unit and be sent to the one source pole controller;
Should compensate back GTG value with this source electrode controller and correspond to a compensation back voltage; And
Should compensate back voltage by this source electrode controller and export this first picture element to.
2. the pixel voltages compensation method of display panel according to claim 1 is characterized in that: the positive polarity and the reverse voltage that more comprise each GTG value of this first picture element that should plural number picture element group to each are set this compensation back GTG value respectively.
3. the pixel voltages compensation method of display panel according to claim 1 is characterized in that: the described step of setting up this pixel voltages compensation meter comprises:
Set one second common electrode voltage, make other picture element of this plural number be GTG;
Set one first common electrode voltage, make this first picture element be GTG;
The difference of this first common electrode voltage and this second common electrode voltage is defined as a bucking voltage;
The display voltage of this first picture element is deducted this bucking voltage, to obtain a compensation back voltage; And
Should compensate back voltage and correspond to this compensation back GTG value.
4. the pixel voltages compensation method of display panel according to claim 3, it is characterized in that: the positive polarity and the reverse voltage that more comprise each GTG value of this first picture element repeat to set up this pixel voltages compensation meter, with positive polarity and pairing this compensation back GTG value of reverse voltage of this each GTG value of defining this first picture element.
5. the pixel voltages compensation method of a display panel, this panel has plural picture element group, and each should plural number picture element group comprise one first picture element and other picture element of plural number, it is characterized in that its step comprises:
Look into forms unit in one and set up a pixel voltages compensation meter;
Determine a compensation back GTG value of this other picture element of plural number with a sequential control module according to this pixel voltages compensation meter;
Should compensate back GTG value by this timing control unit and be sent to the one source pole controller;
Should compensate back GTG value with this source electrode controller and correspond to a compensation back voltage; And
Should compensate back voltage by this source electrode controller and export other picture element of this plural number to.
6. the pixel voltages compensation method of display panel according to claim 5 is characterized in that: more comprise to each should other picture element of this plural number of plural number picture element group in, the positive polarity of each GTG value and reverse voltage are set this compensation back GTG value respectively.
7. the pixel voltages compensation method of display panel according to claim 5 is characterized in that: the described step of setting up this pixel voltages compensation meter comprises:
Set one first common electrode voltage, make this first picture element be GTG;
Set one second common electrode voltage, make other picture element of this plural number be GTG;
The difference of this first common electrode voltage and this second common electrode voltage is defined as a bucking voltage;
The display voltage of this other picture element of plural number is deducted this bucking voltage, to obtain a compensation back voltage; And
Should compensate back voltage and correspond to this compensation back GTG value.
8. the pixel voltages compensation method of display panel according to claim 7, it is characterized in that: more comprise at the positive polarity of each GTG value of this other picture element of plural number and the step that reverse voltage repeats to set up this pixel voltages compensation meter, with positive polarity and pairing this compensation back GTG value of reverse voltage of this each GTG value of defining this other picture element of plural number.
9. the display panel framework of a tool pixel voltages compensation is characterized in that, comprises:
A pair of haplotype data transfer rate SDRAM (Synchronous dynamic random access memory) is in order to handle image signal;
One sequential control module, electrical couplings are to this Double Date Rate SDRAM (Synchronous dynamic random access memory), to receive this image signal;
One looks into forms unit, and electrical couplings is to this timing control unit, and wherein this is looked into forms unit and has a built-in pixel voltages compensation meter, in order to define at least one compensation back GTG value;
One source pole controller, electrical couplings be to this timing control unit, in order to receive by this timing control unit export should at least one compensation back GTG value, and export plural source electrode signal to the complex data line; And
One gate controller, electrical couplings are to this timing control unit, in order to export plural gate signal to plural sweep trace;
Wherein should comprise at least one compensation back voltage by plural number source electrode signal, it is according to this compensation back GTG value decision by this source electrode controller.
10. the display panel framework of tool pixel voltages compensation according to claim 9 is characterized in that: more comprise plural picture element group, each should plural number picture element group comprise one first picture element and other picture element of plural number.
11. the display panel framework of tool pixel voltages compensation according to claim 10, it is characterized in that: the described forms unit that looks into utilizes one first common electrode voltage and one second common electrode voltage to define this compensation back GTG value, and the voltage the when voltage when this first common electrode voltage is GTG for this first picture element, this second common electrode voltage are GTG for other picture element of this plural number.
12. the display panel framework of tool pixel voltages according to claim 10 compensation is characterized in that: described at least one compensation back voltage is to export this first picture element that each should plural number picture element group to.
13. the display panel framework of tool pixel voltages according to claim 10 compensation is characterized in that: described at least one compensation back voltage is to export other picture element of this plural number that each should plural number picture element group to.
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