CN101477284B - LCD with improved display trace caused by uneven brightness and driving method thereof - Google Patents
LCD with improved display trace caused by uneven brightness and driving method thereof Download PDFInfo
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- CN101477284B CN101477284B CN2009100053277A CN200910005327A CN101477284B CN 101477284 B CN101477284 B CN 101477284B CN 2009100053277 A CN2009100053277 A CN 2009100053277A CN 200910005327 A CN200910005327 A CN 200910005327A CN 101477284 B CN101477284 B CN 101477284B
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Abstract
The invention discloses a liquid crystal display device and a method for driving the same. A pixel array of the liquid crystal display device comprises two first pixel sets and two second pixel sets. Two first pixel sets are adjacently arranged on the same side of a data wire; each first pixel set comprises a first pixel and a second pixel; two second pixel sets are adjacently arranged on the other side of the data wire; and each second pixel set comprises a third pixel and a fourth pixel. The method for driving the liquid crystal display device comprises the following steps: driving one second pixel set of the two second pixel sets, and transmitting a first signal to the fourth pixel; driving the first pixel of the first pixel set, and transmitting a second signal to the first pixel; driving the other second pixel set, and transmitting a third signal to the other fourth pixel; and driving the third pixel of the former second pixel set, and transmitting a fourth signal to the third pixel.
Description
Technical field
The present invention relates to a kind of LCD with and driving method, relate in particular to a kind of improvement causes vertical bar shape display trace (Mura) because of brightness irregularities LCD with and driving method.
Background technology
Function advanced person's display gradually becomes the valuable feature of consumption electronic product now, and wherein LCD has become the display that various electronic equipments such as TV, mobile phone, PDA(Personal Digital Assistant), digital camera, computer screen or the widespread use of mobile computer screen institute have the high-resolution color screen gradually.
See also Fig. 1, Fig. 1 is the functional block diagram of the liquid crystal indicator of prior art.LCD 10 comprises pel array (pixel matrix) 12, gate drivers (gate driver) 14 and source electrode driver (source driver) 16.Pel array 12 comprises most and represents the trichromatic pixel of RGB (RGB) to constitute respectively.With the pel array 12 of one 1024 * 768 resolution, need 1024 * 768 * 3 combination of pixels to form altogether.Gate drivers 14 makes the unlatching in regular turn of each row via sweep trace G0-Gn output scanning signal, 16 pixels via corresponding data-signal to a permutation of data line S0-Sm output of source electrode driver make it be charged to required separately display voltage simultaneously, to show different GTGs.After the charging of same row finished, the sweep signal that gate drivers 14 just will be listed as was closed, then gate drivers 14 again the output scanning signal transistor of the pixel of next column is opened, the pixel by 16 pairs of next columns of source electrode driver discharges and recharges again.So go down in regular turn, all charge up to all pixels of pel array 12 and finish, again since the first row charging.
In the design of present pel array, gate drivers 14 equivalences are gone up and are offset buffers (shiftregister), its purpose promptly every a fixed intervals output scanning signal to pel array 12.With the pel array 12 of one 1024 * 768 resolution and the renewal frequency of 60Hz is example, and the demonstration time of each picture (frame) is about 1/60=16.67ms, so the pulse of each sweep signal is about 16.67ms/768=21.7 μ s; Source electrode driver 16 can discharge and recharge required voltage with pixel 20, to demonstrate corresponding GTG in the time of this 21.7 μ s.
See also Fig. 1, Fig. 1 is that (Half Source Driver, HSD) line of pixels of the LCD of technology lists intention to tradition use half source electrode driver.Because the characteristic of traditional HSD framework causes with source electrode driver 16 directly to link to each other and the transistor that links to each other indirectly, its charging times can be different.With pixel T1-T8 is example, and at each picture (frame), directly pixel T1, T3, T6, the T8 that is connected with source electrode driver 16 will be recharged twice.And pixel T2, the T4, T5, the T7 that are connected with source electrode driver 16 indirectly only are recharged once.
See also Fig. 2, the local enlarged diagram of display trace appears in the pel array 12 that Fig. 2 illustrates Fig. 1.Because the number of times difference of pixel T1-T8 transistor charging, make the inhomogeneous problem of display trace (Mura) that causes of pixel intensity produce, especially when showing single grey menu, the display trace of several vertical bar shapes is particularly evident, and reduces the quality of image of panel integral body.
Summary of the invention
Technical matters to be solved by this invention is to provide a kind of improvement to cause the LCD of vertical bar shape display trace because of brightness irregularities, to solve prior art problems.
For achieving the above object, the invention provides a kind of LCD, it comprises a pel array.This pel array comprises first sweep trace, second sweep trace and the three scan line that be arranged in parallel, and intersects at this first, second and the data line of three scan line.Two first pixel groups are adjacent to the same side of this data line, and each first pixel groups comprises first pixel and second pixel.Two second pixel groups then are adjacent to the opposite side of this data line, and respectively this second pixel groups comprises one the 3rd pixel and one the 4th pixel.This first pixel comprises one first active member, electrically connect with this second sweep trace and this data line, this second pixel comprises one second active member, electrically connect with this first sweep trace and this first active member, the 3rd pixel comprises one the 3rd active member, electrically connect with this three scan line and this data line, the 4th pixel comprises one the 4th active member, electrically connects with this second sweep trace and the 3rd active member.
For achieving the above object, according to one embodiment of the invention, the driving method of this LCD comprises following steps: drive one second pixel groups of these at least two second pixel groups, and by this data line transmit one first signal in the 4th pixel and a secondary signal in the 3rd pixel.Drive another second pixel groups of this at least two second pixel groups, and by this data line transmit one first signal in the 4th pixel and a secondary signal in the 3rd pixel.Drive wherein one first pixel groups of this at least two first pixel groups, and by this data line transmit one the 3rd signal in this second pixel and one the 4th signal in this first pixel.Drive another first pixel groups of this at least two first pixel groups, and by this data line transmit one the 3rd signal in this second pixel and one the 4th signal in this first pixel.
And for achieving the above object, according to another embodiment of the present invention, the driving method of this LCD comprises following steps: drive one second pixel groups of these at least two second pixel groups, and transmit one first signal in the 4th pixel by this data line.Drive wherein first pixel of this first pixel groups, and transmit a secondary signal in this first pixel by this data line.Drive this another second pixel groups of this at least two second pixel groups, and transmit one the 3rd signal in another the 4th pixel by this data line.Drive one the 3rd pixel of these at least two second pixel groups, and transmit one the 4th signal in the 3rd pixel by this data line.
In sum, the employed pixel array architecture of LCD of the present invention is under the vision of human eye, because tessellated display trace is comparatively fuzzy than vertical bar shape display trace, so visually improved the vertical display trace that prior art utilizes the sawtooth pattern array to be staggered and to cause under the half source electrode driver Technical Architecture of type, make the screen defect of its perception more not obvious.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Description of drawings
Fig. 1 uses the line of pixels of the LCD of half source electrode driver technology for tradition and lists intention;
The local enlarged diagram of display trace appears in the pel array that Fig. 2 illustrates Fig. 1;
Fig. 3 is the synoptic diagram of LCD of the present invention;
Fig. 4 is the process flow diagram of type of drive of the LCD of driving Fig. 3 of the present invention;
Fig. 5 is the local enlarged diagram that display trace appears in the pel array that illustrates Fig. 3;
Fig. 6 is the process flow diagram of another type of drive of the LCD of driving Fig. 3 of the present invention.
Wherein, Reference numeral:
10,100: liquid crystal indicator 12,102: pel array
14,104: gate drivers 16,106: source electrode driver
Sx, Sm: data line Gy-Gn: sweep trace
111,112: the first pixel groups 121,122: the second pixel groups
P1a, P1b: active member P2a, P2b: active member
P3a, P3b: active member P4a, P4b: active member
P11, P12: pixel P21, P22: pixel:
P13, P14: pixel P23, P24: pixel
T1-T8: pixel P31, P32: pixel
P41, P42: pixel P1c, P1d: active member
P2c, P2d: active member
Embodiment
See also Fig. 3, Fig. 3 is the synoptic diagram of LCD 100 of the present invention.LCD device 100 comprises pel array (pixel matrix) 102, gate drivers (gate driver) 104 and source electrode driver (source driver) 106.Pel array 102 comprises pixel (pixel), and each pixel of pel array comprises three and represents the trichromatic majority of RGB (RGB) pixel cell pixel to constitute respectively.Gate drivers 104 output scanning signals, make the pixel cell of opening each row in regular turn open in regular turn via sweep trace G0-Gn, 106 pixels via corresponding data-signal to a permutation of data line S0-Sm output of source electrode driver make it be charged to required separately display voltage simultaneously, to show different GTGs.In the present embodiment, the pixel of pel array 102 is triangularly arranged (delta RGB), and the be staggered half source electrode driver technology of (Zigzag Pixel Design) type of collocation sawtooth pattern array.
For ease of explanation, only acquisition part pel array illustrates as present embodiment on the pel array 102.Pel array comprises the first sweep trace Gy, the second sweep trace Gy+1, three scan line Gy+2, the 4th sweep trace Gy+3 and the 5th sweep trace Gy+4 that be arranged in parallel, and the data line Sx that intersects at this first, second, third, fourth and the 5th sweep trace Gy, Gy+1, Gy+2, Gy+3, Gy+4.Two first pixel groups 111,112 are adjacent to the same side of data line Sx, and first pixel groups 111 comprises the first pixel P11 and the second pixel P12, and first pixel groups 112 comprises the first pixel P21 and the second pixel P22.Two second pixel groups 121,122 then are adjacent to the opposite side of data line Sx, and second pixel groups 121 comprises the 3rd pixel P13 and the 4th pixel P14, and second pixel groups 122 comprises the 3rd pixel P23 and the 4th pixel P24.
The first pixel P11 of first pixel groups 111 comprises the first active member P1a, electrically connect with three scan line Gy+2 and data line Sx, the second pixel P12 of first pixel groups 111 comprises the second active member P2a, electrically connect with the first active member P1a of the 4th sweep trace Gy+3 and the first pixel P11, the first pixel P21 of first pixel groups 112 comprises the first active member P1b, electrically connect with the 4th sweep trace Gy+3 and data line Sx, the second pixel P22 of first pixel groups 112 comprises the second active member P2b, with the first active member P1b electric connection of the 5th sweep trace Gy+4 and the first pixel P21.The 3rd pixel P13 of second pixel groups 121 comprises the 3rd active member P3a, electrically connect with the first sweep trace Gy and data line Sx, the 4th pixel P14 of second pixel groups 121 comprises the 4th active member P4a, electrically connect with the 3rd active member P3a of the second sweep trace Gy+1 and the 3rd pixel P13, the 3rd pixel P23 of second pixel groups 122 comprises the 3rd active member P3b, electrically connect with the second sweep trace Gy+1 and data line Sx, the 4th pixel P24 of second pixel groups 122 comprises the 4th active member P4b, with the 3rd active member P3b electric connection of three scan line Gy+2 and the 3rd pixel P23.And first pixel groups and second pixel groups are arranged in the not homonymy of data line Sx in regular turn in twos along data line Sx.With Fig. 3 is example, along data line Sx, from top to bottom (away from the direction of source electrode driver 106), be respectively second pixel groups 121,122 that is arranged in data line Sx left side (than a side) near gate drivers 104, and first pixel groups 111,112 that is arranged in data line Sx right side (than the opposite side near gate drivers 104), other is partly asked, and the rest may be inferred will repeat no more herein.
See also Fig. 3 and Fig. 4, Fig. 4 is the process flow diagram of type of drive of the LCD of driving Fig. 3 of the present invention.Method of the present invention comprises following step:
Step 402: drive second pixel groups 121, and by data line Sx transmit one first signal in the 4th pixel P14 and a secondary signal in the 3rd pixel P13.
Step 404: drive second pixel groups 122, and by data line Sx transmit this first signal in the 4th pixel P24 and this secondary signal in the 3rd pixel P23.
Step 406: drive first pixel groups 111, and by data line Sx transmit one the 3rd signal in the second pixel P12 and one the 4th signal in the first pixel P11.
Step 408: drive first pixel groups 112, and by data line Sx transmit one the 3rd signal in the second pixel P22 and one the 4th signal in the first pixel P21.
Wherein, in step 402 and 404, be sent to first signal of the 4th pixel P14 and P24, be preferably identical signal, but those skilled in the art also can provide the 4th pixel P14 the signal different with P24 according to actual demand, and the present invention is not to exceed.In the same manner, in step 402 and 404, be sent to the secondary signal of the 3rd pixel P13 and P23, in step 406 and 408, be sent to the second pixel P12 with in step 406 and 408, the 3rd signal of P22 be sent to the 4th signal of the first pixel P11 and P21.
See also Fig. 3 and Fig. 6, Fig. 6 is the process flow diagram of another type of drive of the LCD of driving Fig. 3 of the present invention.Method of the present invention comprises following step:
Step 602: drive second pixel groups 121, and transmit one first signal in the 4th pixel P14 by data line Sx.
Step 604: drive first pixel groups 114, and transmit a secondary signal in the first pixel P41 by data line Sx.
Step 606: drive second pixel groups 122, and transmit one the 3rd signal in the 4th pixel P24 by data line Sx.
Step 608: drive second pixel groups 121, and transmit one the 4th signal in the 3rd pixel P13 by data line Sx.
Wherein, in step 602, in the process that transmits first signal to the, four pixel P14, need to transmit by sweep trace Gy and Gy+1 simultaneously to scan signal to open the 3rd active member P3a and the 4th active member P4a.In step 606, in the process that transmits the 3rd signal to the four pixel P24, need to transmit by sweep trace Gy+1 and Gy+2 simultaneously to scan signal to open the 3rd active member P3b and the 4th active member P4b.
Similarly, next gate drivers 104 transmits sweep signal via sweep trace Gy+3, Gy+2, active member P2a, the P1a of the pixel groups 111 of winning are opened, source electrode driver 106 transmitted active member P2a, the P1a of the 5th signal process unlatching and was sent to the second pixel P12 through data line Sx this moment, and this moment, the first pixel P11 and the second pixel P12 showed GTG according to the 5th signal.Then transmit sweep signal via sweep trace Gy+2, make the active member P3b of second pixel groups 122 open, source electrode driver 106 transmitted the active member P3b of one the 6th signal process unlatching and was sent to the 3rd pixel P23 through data line Sx this moment, and this moment, the 3rd pixel P23 showed GTG according to the 6th signal.Gate drivers 104 transmits sweep signal via sweep trace Gy+3, Gy+4 again, active member P1b, the P2b of the pixel groups 112 of winning are opened, source electrode driver 106 transmitted active member P1b, the P2b of one the 7th signal process unlatching and was sent to the second pixel P22 through data line Sx this moment, and this moment, the first pixel P21 and the second pixel P22 showed GTG according to the 7th signal.Follow via sweep trace Gy+2 transmission sweep signal, the active member P1a of the pixel groups 111 of winning is opened, source electrode driver 106 transmitted the active member P1a of one the 8th signal process unlatching and was sent to the first pixel P11 through data line Sx this moment.
By above-mentioned mechanism, all charge up to all pixels of pel array 102 and to finish, again since the first row charging.No matter adopt Fig. 4 or type of drive shown in Figure 6, in a display frame process, pixel P11, the P21, P13, P23, P31, the P41 that are directly connected in data line Sx can be recharged twice, and be connected in pixel P12, P22, P14, P24, P32, the P42 of data line Sx indirectly, then only be recharged once.So when the display frame of single GTG, the display trace that pel array 102 presents is to present the chessboard trellis as shown in Figure 5.Under the vision of human eye, the tessellated display trace of pel array 102 of the present invention spatially and to present the display trace of vertical bar shape unlike prior art pel array 12 obvious.
In sum, the employed pixel array architecture of LCD of the present invention is under the vision of human eye, because tessellated display trace is comparatively fuzzy than vertical bar shape display trace, so visually improved the vertical display trace that prior art utilizes the sawtooth pattern array to be staggered and to cause under the half source electrode driver Technical Architecture of type, make the screen defect of its perception more not obvious.
Certainly; the present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make various corresponding changes and distortion according to the present invention, but these corresponding changes and distortion all should belong to the protection domain of the appended claim of the present invention.
Claims (6)
1. LCD, it comprises a pel array, it is characterized in that, this pel array comprises:
One first sweep trace, one second sweep trace, a three scan line, one the 4th sweep trace and one the 5th sweep trace, it be arranged in parallel;
One data line, it intersects at this first, second, third, fourth and the 5th sweep trace;
At least two first pixel groups be adjacent to the same side of this data line, and respectively this first pixel groups comprise one first pixel and one second pixel; And
At least two second pixel groups be adjacent to the opposite side of this data line, and respectively this second pixel groups comprise one the 3rd pixel and one the 4th pixel;
Wherein this first pixel comprises one first active member, electrically connect with this first sweep trace and this data line, this second pixel comprises one second active member, electrically connect with this second sweep trace and this first active member, the 3rd pixel comprises one the 3rd active member, electrically connect with this second sweep trace and this data line, the 4th pixel comprises one the 4th active member, electrically connects with this three scan line and the 3rd active member.
2. LCD according to claim 1 is characterized in that, this pel array is the sawtooth pattern array and is staggered.
3. a type of drive that is used for driving the described LCD of claim 1 is characterized in that, comprising:
Drive one second pixel groups of these at least two second pixel groups, and by this data line transmit one first signal in the 4th pixel and a secondary signal in the 3rd pixel;
Drive another second pixel groups of this at least two second pixel groups, and by this data line transmit one first signal in the 4th pixel and a secondary signal in the 3rd pixel;
Drive wherein one first pixel groups of this at least two first pixel groups, and by this data line transmit one the 3rd signal in this second pixel and one the 4th signal in this first pixel; And
Drive another first pixel groups of this at least two first pixel groups, and by this data line transmit one the 3rd signal in this second pixel and one the 4th signal in this first pixel.
4. a type of drive that is used for driving the described pel array of claim 1 is characterized in that, comprising:
Drive one second pixel groups of these at least two second pixel groups, and transmit one first signal in the 4th pixel by this data line, in the process that transmits first signal to the, four pixels, need to transmit by sweep trace simultaneously to scan signal to open the 3rd active member and the 4th active member;
Drive wherein first pixel of this first pixel groups, and transmit a secondary signal in this first pixel by this data line;
Drive this another second pixel groups of this at least two second pixel groups, and transmit one the 3rd signal in another the 4th pixel by this data line, in the process that transmits the 3rd signal to the four pixels, need to transmit by sweep trace simultaneously to scan signal to open the 3rd active member and the 4th active member;
Drive one the 3rd pixel of these at least two second pixel groups, and transmit one the 4th signal in the 3rd pixel by this data line.
5. the type of drive of pel array according to claim 4 is characterized in that, this drives one second pixel groups of these at least two second pixel groups, for the 3rd active member and the 4th active member one scan signal are provided simultaneously.
6. the type of drive of pel array according to claim 5 is characterized in that, drives this another second pixel groups of this at least two second pixel groups, for this another the 3rd active member and this another the 4th active member one scan signal are provided simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100053277A CN101477284B (en) | 2009-02-09 | 2009-02-09 | LCD with improved display trace caused by uneven brightness and driving method thereof |
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| CN2009100053277A CN101477284B (en) | 2009-02-09 | 2009-02-09 | LCD with improved display trace caused by uneven brightness and driving method thereof |
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| CN101477284B true CN101477284B (en) | 2011-06-08 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101777302B (en) * | 2010-03-04 | 2012-01-04 | 友达光电股份有限公司 | Display circuit for monitor and monitor |
| CN104298041B (en) * | 2014-11-10 | 2017-04-26 | 深圳市华星光电技术有限公司 | Array substrate, liquid crystal display panel and liquid crystal display |
| CN104360551B (en) * | 2014-11-10 | 2017-02-15 | 深圳市华星光电技术有限公司 | Array substrate, liquid crystal panel and liquid crystal display |
| CN105070273B (en) * | 2015-09-02 | 2017-07-28 | 深圳市华星光电技术有限公司 | The luminance compensation method in Mura regions and the design method of Mura pixel brightness |
| CN112542145B (en) * | 2019-09-18 | 2021-12-31 | 友达光电股份有限公司 | Display panel |
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