CN105280143A - Mura eliminating method for tri-gate liquid crystal display panel - Google Patents

Abstract

The invention discloses a mura eliminating method for a tri-gate liquid crystal display panel, which is characterized by comprising the steps of 101, establishing a lookup table 1 through measurement or a mathematical model; 102, as for a display unit P, acquiring a corrected gray-scale value Gadjust(P) and an adjusted Gdiff(P) through the lookup table 1 according to a image signal gray-scale value GlastLine(P) of the last line and a gray-scale value GcurLine(P) of the current line, wherein the Gdiff(P)= Gadjust(P)-GcurLine(P); 103, acquiring an adjustment gain factor Alpha<p> of the display unit P through a lookup table 2, and then calculating a corrected gray-scale value G'diff(P), which is adjusted according to the spatial position, of the display unit P on the basis of the adjustment gain factor Alpha<p>; and 104, displaying the corrected gray-scale value G'diff(P) of the display unit P to the tri-gate liquid crystal display panel, and acquiring a consistent display result. The mura eliminating method disclosed by the invention can dynamically adjust the definition of television video pictures, the best display quality is acquired, and the viewing experience of the audience is improved.

Description

The removing method of a kind of three grid pixel liquid crystal display panel Mura

Technical field

The present invention relates to image processing field, especially relate to the removing method of a kind of three grid pixel liquid crystal display panel Mura.

Background technology

Liquid crystal display relies on the features such as it is lightweight, volume is little, little power consumption, Low emissivity, and by various electronic equipment as computer screen, TV etc. widely use.Display panels is the important component part of liquid crystal display, can be divided into single grid pixel liquid crystal display panel (single-gatepanel) and three grid pixel liquid crystal display panels (tri-gatepanel) according to the drive pattern of dot structure.Fig. 1 is the dot structure vertical view of three grid-type pixel liquid crystal display panels of prior art, under image resolution is Ht × Wd, the number of the surface sweeping line that three grid-type pixel liquid crystal display panels have and data line is respectively 3 × Ht bar and Wd bar, and it has more low cost and power consumption relative to single grid pixel liquid crystal display panel.

But, on the one hand because each display unit is different to the distance of scan drive circuit (scandriver) on panel, so the significant response time during conversion of its GTG is different, the image frame of Display panel can be caused to occur visible unevenness (mura); Each display unit is different to the distance of data drive circuit (datadiver) on the other hand, so the delay of level conversion corresponding during GTG conversion is different, the image frame of Display panel also can be caused to occur visible unevenness.These unevenness can cause the distortion of image frame, reduce image frame display quality.

Summary of the invention

Object of the present invention is exactly the present situation occurring visible unevenness (mura) for the image frame of Display panel, the removing method of a kind of three grid pixel liquid crystal display panel Mura of proposition.

A removing method of three grid pixel liquid crystal display panel Mura, is characterized in that: comprise the following steps:

101, by measuring or Mathematical Models look-up table 1 and look-up table 2;

102, for display unit P, according to the signal of video signal grey decision-making G of its lastrow _laatLine(P) with the grey decision-making G of current line _curLine(P), obtain correcting grey decision-making G by look-up table 1 _adjust(P) with adjustment grey decision-making G _diff(P), wherein:

G _diff(P)＝G _adjust(P)-G _curLine(P)；

103, the adjustment gain factor Alpha of display unit P is obtained by look-up table 2 _p, then according to adjustment gain factor Alpha _pcalculate the correction grey decision-making G ' according to locus adjustment of display unit P _diff(P), namely

G’ _diff(P)＝G _curLine(P)+(Alpha _p/LUT2_precise)XG _diff(P)

Wherein, LUT2_precise is the precision size of element in look-up table 2;

104, by the correction grey decision-making G ' of display unit P _diff(P) be shown to three grid pixel liquid crystal display panels, obtain conforming display result.

Described look-up table 1 is generated by following steps:

201, fixing input one frame pure color image, its color is, red=g1, green=g1, and indigo plant=g2, g1 and g2 is the grey decision-making of two 0 ~ 255, and g1 is not equal to g2;

202, by range sweep driving circuit on display panel and data drive circuit near, there is no the normal viewing area of mura as target area Region_0, using viewing area serious for a mura any on display panel as the region Region_1 that will correct;

203, adjustment initial value is current line and lastrow grey decision-making in the look-up table 1 of zero is (g1, g2) unit LUT1 (g1, g2) correction grey decision-making size, and and current line and lastrow be respectively (g2, g1) unit LUT1 (g2, g1) correction grey decision-making size, makes the region Region_1 that will correct consistent with the colouring information that target area Region_0 is measured by color sensor;

204, whether the value of g1 and g2 has traveled through the coordinate figure of look-up table 1 correspondence, and if not, change the value of g1 and g2, g1 can equal g2, repeats step 203, if so, completes the foundation of look-up table 1.

Described look-up table 2 is generated by following steps:

301, fixing input one frame pure color image, its color is: red=g3, green=g3, and indigo plant=g4, g3 and g4 is the grey decision-making of two 0 ~ 255, and g3 is not equal to g4;

302, use color sensor measurement target region Region_0 and want colouring information Color0 and Color1 of correcting area Region_1;

303, color sensor is used to measure the colouring information of the viewing area Region_x of different spatial on display panel;

304, for viewing area Region_x, color sensor measurement obtains its colouring information Colorx, then the computing method of the adjustment gain factor of viewing area Region_x are:

${\mathrm{Alpha}}_x=\frac{\mathrm{difference}(\mathrm{Color}0,\mathrm{Colorx})}{\mathrm{difference}(\mathrm{Color}0,\mathrm{Color}1)}*\mathrm{LUT}2\_\mathrm{precise}$

If the representation of the colouring information of wherein color sensor measurement is the red, green, blue component grey decision-making size of color, then the method calculating colouring information difference is:

difference(Color0，Colorx)＝abs(R0-Rx)+abs(G0-Gx)+abs(B0-Bx)

difference(Color0，Color1)＝abs(R0-R1)+abs(G0-G1)+abs(B0-B1)

Wherein (R0, G0, B0), (R1, G1, B1), (Rx, Gx, Bx) is the colouring information Color0 of the region Region_0 that color sensor measures, Region_1, Region_x respectively, Color1, Colorx;

305, the Dynamic gene in all regions has calculated all on display panel, if not, performs step 303; If so, the foundation of look-up table 2 is completed.

Compared with prior art, effect of the present invention is actively significantly, specifically, the present invention is according to image up-downgoing gray level information, and on correction data line, level conversion postpones the unevenness of the display effect caused, then according to the spatial positional information of each display unit on three grid display panels, further adjustment display effect, dynamic conditioning television image image sharpness, obtains best display image quality, promotes spectators' viewing experience.

Accompanying drawing explanation

Fig. 1 is that the present invention is with the look-up table 1 of hexadecimal representation;

Fig. 2 is that the present invention is with the look-up table 2 of hexadecimal representation;

Fig. 3 is the screen image element structural drawing of three grid pixel liquid crystal display panels;

Fig. 4 is method flow Fig. 1 of the present invention;

Fig. 5 is method flow Fig. 2 of the present invention;

Fig. 6 is method flow Fig. 3 of the present invention;

Embodiment

Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.

As shown in Figure 1, the removing method of a kind of three grid pixel liquid crystal display panel Mura, is characterized in that: comprise the following steps:

101, by measuring or Mathematical Models look-up table 1 and look-up table 2;

102, for display unit P, according to the signal of video signal grey decision-making G of its lastrow _laatLine(P) the grey decision-making G of=1F and current line _curLine(P)=7F, obtains correcting grey decision-making G by look-up table 1 _adjust(P)=AA and adjustment grey decision-making G _diff(P)=2B, wherein:

2B＝AA-7F；

103, the adjustment gain factor Alpha of display unit P is obtained by look-up table 2 _p=80, then according to adjustment gain factor Alpha _pcalculate the correction grey decision-making G ' according to locus adjustment of display unit P _diff(P)=94, namely

G’ _diff(P)＝G _curLine(P)+(Alpha _p/LUT2_precise)XG _diff(P)＝7F+(80/100)x2B＝94

Wherein, LUT2_precise is the precision size of element in look-up table 2, is 100 in the present embodiment;

104, by the correction grey decision-making G ' of display unit P _diff(P) be shown to three grid pixel liquid crystal display panels, obtain conforming display result.

2, as shown in Figure 5, described look-up table 1 is generated by following steps:

201, fixing input one frame pure color image, its color is, red=g1, green=g1, and indigo plant=g2, g1 and g2 is the grey decision-making of two 0 ~ 255, and g1 is not equal to g2;

202, by range sweep driving circuit on display panel and data drive circuit near, there is no the normal viewing area of mura as target area Region_0, using viewing area serious for a mura any on display panel as the region Region_1 that will correct;

203, adjustment initial value is current line and lastrow grey decision-making in the look-up table 1 of zero is (g1, g2) unit LUT1 (g1, g2) correction grey decision-making size, and and current line and lastrow be respectively (g2, g1) unit LUT1 (g2, g1) correction grey decision-making size, makes the region Region_1 that will correct consistent with the colouring information that target area Region_0 is measured by color sensor;

204, whether the value of g1 and g2 has traveled through the coordinate figure of look-up table 1 correspondence, and if not, change the value of g1 and g2, g1 can equal g2, repeats step 203, if so, completes the foundation of look-up table 1.

3, as shown in Figure 6, described look-up table 2 is generated by following steps:

301, fixing input one frame pure color image, its color is: red=g3=7F, green=g3=7F, indigo plant=g4=1F;

302, use color sensor measurement target region Region_0 and want colouring information Color0=(7F, 7F, 1F) and the Color1=(6F, 7F, 27) of correcting area Region_1;

303, color sensor is used to measure the colouring information of the viewing area Region_x of different spatial on display panel;

304, for viewing area Regoin_x, color sensor measurement obtains its colouring information Colorx=(5F, 7F, 2F), then the computing method of the adjustment gain factor of viewing area Region_x are:

${\mathrm{Alpha}}_x=\frac{\mathrm{difference}(\mathrm{Color}0,\mathrm{Colorx})}{\mathrm{difference}(\mathrm{Color}0,\mathrm{Color}1)}*\mathrm{LUT}2\_\mathrm{precise}$

Wherein the computing method of colouring information difference are:

difference(Color0，Colorx)＝abs(R0-Rx)+abs(G0-Gx)+abs(B0-Bx)

difference(Color0，Color1)＝abs(R0-R1)+abs(G0-G1)+abs(B0-B1)

In the present embodiment ${\mathrm{Alpha}}_x=\frac{\mathrm{abs}(7F-6F)+\mathrm{abs}(7F-7F)+\mathrm{abs}(1F-27)}{\mathrm{abs}(7F-5F)+\mathrm{abs}(7F-7F)+\mathrm{abs}(1F-2F)}*256=128;$

305, calculate the Dynamic gene in all regions on display panel, complete the foundation of look-up table 2.

Claims (3)

1. a removing method of three grid pixel liquid crystal display panel Mura, is characterized in that: comprise the following steps:

101, by measuring or Mathematical Models look-up table 1 and look-up table 2;

102, for display unit P, according to the signal of video signal grey decision-making G of its lastrow _lastLine(P) with the grey decision-making G of current line _curLine(P), obtain correcting grey decision-making G by look-up table 1 _adjust(P) with adjustment grey decision-making G _diff(P), wherein:

G _diff(P)＝G _adjust(P)-G _curLine(P)；

103, the adjustment gain factor Alpha of display unit P is obtained by look-up table 2 _p, then according to adjustment gain factor Alpha _pcalculate the correction grey decision-making G ' according to locus adjustment of display unit P _diff(P), namely

G’ _diff(P)＝G _curLine(P)+(Alpha _p/LUT2_precise)×G _diff(P)

Wherein, LUT2_precise is the precision size of element in look-up table 2;

104, by the correction grey decision-making G ' of display unit P _diff(P) be shown to three grid pixel liquid crystal display panels, obtain conforming display result.

2. the removing method of a kind of three grid pixel liquid crystal display panel Mura as claimed in claim 1, is characterized in that: described look-up table 1 is generated by following steps:

201, fixing input one frame pure color image, its color is, red=g1, green=g1, and indigo plant=g2, g1 and g2 is the grey decision-making of two 0 ~ 255, and g1 is not equal to g2;

202, by range sweep driving circuit on display panel and data drive circuit near, there is no the normal viewing area of mura as target area Region_0, using viewing area serious for a mura any on display panel as the region Region_1 that will correct;

203, adjustment initial value is current line and lastrow grey decision-making in the look-up table 1 of zero is (g1, g2) unit LUT1 (g1, g2) correction grey decision-making size, and and current line and lastrow be respectively (g2, g1) unit LUT1 (g2, g1) correction grey decision-making size, makes the region Region_1 that will correct consistent with the colouring information that target area Region_0 is measured by color sensor;

204, whether the value of g1 and g2 has traveled through the coordinate figure of look-up table 1 correspondence, and if not, change the value of g1 and g2, g1 can equal g2, repeats step 203, if so, completes the foundation of look-up table 1.

3. the removing method of a kind of three grid pixel liquid crystal display panel Mura as claimed in claim 1, is characterized in that: described look-up table 2 is generated by following steps:

301, fixing input one frame pure color image, its color is: red=g3, green=g3, and indigo plant=g4, g3 and g4 is the grey decision-making of two 0 ~ 255, and g3 is not equal to g4;

302, use color sensor measurement target region Region_0 and want colouring information Color0 and Color1 of correcting area Region_1;

303, color sensor is used to measure the colouring information of the viewing area Region_x of different spatial on display panel;

304, for viewing area Region_x, color sensor measurement obtains its colouring information Colorx, then the computing method of the adjustment gain factor of viewing area Region_x are:

If the representation of the colouring information of wherein color sensor measurement is the red, green, blue component grey decision-making size of color, then the method calculating colouring information difference is:

difference(Color0，Colorx)＝abs(R0-Rx)+abs(G0-Gx)+abs(B0-Bx)

difference(Color0，Color1)＝abs(R0-R1)+abs(G0-G1)+abs(B0-B1)

Wherein (R0, G0, B0), (R1, G1, B1), (Rx, Gx, Bx) is the colouring information Color0 of the region Region_0 that color sensor measures, Region_1, Region_x respectively, Color1, Colorx;

305, the Dynamic gene in all regions has calculated all on display panel, if not, performs step 303; If so, the foundation of look-up table 2 is completed.