CN101667381B - Pixel group, flat display panel and driving method for flat display device - Google Patents
Pixel group, flat display panel and driving method for flat display device Download PDFInfo
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- CN101667381B CN101667381B CN200810214868.6A CN200810214868A CN101667381B CN 101667381 B CN101667381 B CN 101667381B CN 200810214868 A CN200810214868 A CN 200810214868A CN 101667381 B CN101667381 B CN 101667381B
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Abstract
The invention discloses a driving method for a pixel group. The pixel group comprises a plurality of film transistors, and the plurality of film transistors are electrically connected to a first scan line or a second line and a data line. The pixel group is provided with a first display area and a second display area. The first display area is coupled with the data line and the first scan line. The second display area is coupled with the data line, the first scan line and the second scan line. The driving method comprises the following steps that: in a first time interval, providing a first driving signal by the first scan line, providing a second driving signal by the second scan line to conduct the plurality of film transistors, and writing the pixel data into the first display area and the second display area of the pixel group through the data line; and in the second time interval, providing a third driving signal by the second scan line to conduct the plurality of film transistors electrically connected to the second scan line so as to redistribute electric charges at two sides of each film transistor.
Description
Technical field
The present invention relates to driving method, particularly for driving the driving method of pixel groups, two-d display panel and flat display apparatus.
Background technology
Flat display apparatus (Flat Panel Display, FPD), with respect to traditional cathode-ray tube (CRT) (Cathode Ray Tube, CRT) display device, have slim, lightweight, low in energy consumption, the radiationless pollution of size and can with the advantages such as semiconductor fabrication compatibility, be widely used in the various electronic products with display screen.Flat display apparatus is according to its structure and principle of work at present, include for example liquid crystal indicator (Liquid Crystal Display, LCD), plasm display device (Plasma Display Panel, PDP), organic LED display device (Organic LightEmitting Diode display, OLED), field emission display device (Field emission display), Surface-conduction Electron-emitter Display device (Surface conduction Electron Emitter Display, SED), CNT field emission display device (Carbon Nanotube Field Emission Display, CNTFED) etc.
Wherein, take liquid crystal display as example, it utilizes input voltage to control liquid crystal molecule and produces different ordered states, makes its characteristic that light is had to different polarizations or refraction effect control the transmission amount of light, and then makes liquid crystal display show the image of different gray scales.But because light transmission and input voltage are not linear relationship, therefore in order to make liquid crystal display there is preferably display quality, the adjustment of gamma curve (Gamma curve) just seems quite important, and wherein, gamma curve represents the relation curve of gray scale and transmissivity.
Figure 1 shows that the gamma curve schematic diagram of the corresponding different visual angles of different primary colors in available liquid crystal display.General liquid crystal display comprises the sub-pixel of redness, green and blue three kinds of primary colors, and the equal corresponding gamma curve separately of each primary colors.If (being positive visual angle) watches liquid crystal display from the visual angle vertical with liquid crystal display, its trichromatic gamma curve almost can overlap.Yet, if while watching liquid crystal display from side-looking angle, the gamma curve of each primary colors will produce skew, and side-play amount inconsistent, make same gray scale show different colors for positive visual angle from side-looking angle.For example, for can showing the liquid crystal display of 0 to 255 gray scale, if while all applying the input voltage of 128 gray scales for red, green and blue subpixels, for positive visual angle, will show grey, but for side-looking angle, because trichromatic gamma curve side-play amount is different, will show indigo (Indigo).
The side-play amount of this gamma curve, larger when middle gray, less in higher or lower gray scale hour offset amount.In the liquid crystal display of upper example, described middle gray is for example 64 to 196 gray scales, and higher gray scale is 197 to 255 gray scales, and lower gray scale is 0 to 63 gray scale.
Therefore, a kind of method that solves side-looking angle color offset having proposed, to use above-mentioned gamma curve when higher and lower gray scale, to there is the characteristic of less offset amount, a pixel groups is divided into the first viewing area and the second viewing area, be clear zone and dark space, and in the first viewing area, input the voltage of higher gray scale, and in the second viewing area, input the voltage of lower gray scale, with emulation middle gray, make sub-pixel there is approximate color for positive visual angle and side-looking angle.
The driving method of traditional intelligence colour cast alignment technique (Low color shift) be the pixel of the every a line of P-SCAN, and each sweep signal does not have overlapping each other.For example, when opening the 2nd sweep trace, data voltage is inputted the first viewing area and second viewing area of pixel groups simultaneously.Close after the 2nd sweep trace, open immediately the 3rd sweep trace, now open the second viewing area of pixel groups, the storage capacitors of the second viewing area and the electric charge on building-out capacitor are redistributed, make the first viewing area of pixel groups show different gray scales from the second viewing area, to reach Yu Zheng visual angle, side-looking angle, there is approximate color.
But, because above-mentioned driving method provides identical sweep signal to each pixel groups, make the gray scale adjustment of the second viewing area there is no elasticity, if expectation is carried out colour cast compensation for different gray scales, cannot make optimized adjustment for each gray scale.
Therefore, how to provide a kind of for driving the driving method of pixel groups, two-d display panel and flat display apparatus, make all can make optimized adjustment for each gray scale, real is one of current important topic.
Summary of the invention
In view of above-mentioned problem, the object of the present invention is to provide and a kind ofly by circuit, adjust display effect, thereby drive the driving method of pixel groups, two-d display panel and flat display apparatus.
In order to achieve the above object, according to a kind of driving method of the present invention, for driving pixel groups, wherein this pixel groups comprises a plurality of thin film transistor (TFT)s, this thin film transistor (TFT) is electrically connected to the first sweep trace, the second sweep trace and data line, and this pixel groups has the first viewing area and the second viewing area.The first viewing area and data line and the first sweep trace couple, and the second viewing area and data line, the first sweep trace and the second sweep trace couple.This driving method comprises the following steps: in first o'clock distance, the first sweep trace provides the first driving signal and the second sweep trace to provide two driving signal with this thin film transistor (TFT) of conducting, and by data line by the first viewing area of pixel data writing pixel group and the second viewing area; And in second o'clock distance, the second sweep trace provides the 3rd to drive signal to be connected in this thin film transistor (TFT) on the second sweep trace with electric conduction, and the electric charge of each thin film transistor (TFT) both sides is redistributed.
In order to achieve the above object, according to a kind of driving method of the present invention, be used for driving two-d display panel, wherein two-d display panel has at least one pixel groups, one first sweep trace, one second sweep trace and a data line, wherein pixel groups comprises a plurality of thin film transistor (TFT)s, and this thin film transistor (TFT) is electrically connected to the first sweep trace, the second sweep trace and data line.This pixel groups has the first viewing area and the second viewing area, and the first viewing area and data line and the first sweep trace couple, and the second viewing area and data line, the first sweep trace and the second sweep trace couple.This driving method comprises the following steps: in first o'clock distance, the first sweep trace provides the first driving signal and the second sweep trace to provide two driving signal with this thin film transistor (TFT) of conducting, and by data line by the first viewing area of pixel data writing pixel group and the second viewing area; And in second o'clock distance, the second sweep trace provides the 3rd to drive signal to be connected in this thin film transistor (TFT) on the second sweep trace with electric conduction, and the electric charge of each thin film transistor (TFT) both sides is redistributed.
In order to achieve the above object, according to a kind of driving method of the present invention, be used for driving flat display apparatus, wherein flat display apparatus has two-d display panel, and two-d display panel has at least one pixel groups, the first sweep trace, the second sweep trace and data line, wherein this pixel groups comprises a plurality of thin film transistor (TFT)s, and this thin film transistor (TFT) is electrically connected to the first sweep trace, the second sweep trace and data line.This pixel groups has the first viewing area and the second viewing area, and the first viewing area and data line and the first sweep trace couple, and the second viewing area and data line, the first sweep trace and the second sweep trace couple.This driving method comprises the following steps: in first o'clock distance, the first sweep trace provides the first driving signal and the second sweep trace to provide two driving signal with this thin film transistor (TFT) of conducting, and by data line by the first viewing area of pixel data writing pixel group and the second viewing area; And in second o'clock distance, the second sweep trace provides the 3rd to drive signal to be connected in the plurality of thin film transistor (TFT) on the second sweep trace with electric conduction, and the electric charge of each thin film transistor (TFT) both sides is redistributed.
As mentioned above, according to of the present invention for driving the driving method of pixel groups, two-d display panel and flat display apparatus, two sweep traces of conducting simultaneously in the write time of data, to adjust the transmissivity of the first viewing area and the second viewing area.Compared with prior art, the present invention can not need to increase under the prerequisite of data line, the inconsistent phenomenon of gamma curve in the time of can improving display device and face with side-looking, and can make optimized adjustment for each gray scale, thereby raising display quality, and can reduce cost and avoid aperture opening ratio to reduce.
Accompanying drawing explanation
Figure 1 shows that the gamma curve schematic diagram of the corresponding different visual angles of different primary colors in existing a kind of liquid crystal indicator;
Figure 2 shows that the circuit diagram according to the driving method of a kind of pixel groups of the preferred embodiment of the present invention;
Figure 3 shows that the process flow diagram according to the driving method of the pixel groups of the preferred embodiment of the present invention;
Fig. 4 is to the schematic diagram Figure 6 shows that according to different driving waveform in the pixel groups driving method of the preferred embodiment of the present invention;
Figure 7 shows that according to different pressure reduction in the pixel groups driving method of the preferred embodiment of the present invention the schematic diagram of corresponding different gamma curve;
Figure 8 shows that the gamma curve schematic diagram of the corresponding different visual angles of different primary colors in the pixel groups driving method according to the preferred embodiment of the present invention;
Fig. 9 A is depicted as the circuit diagram according to the flat display apparatus driving method of the preferred embodiment of the present invention;
Fig. 9 B is depicted as the corresponding table of the gray scale of storing in the storage unit of Fig. 9 A; And
Figure 10 shows that the another kind of structural representation of the Drive and Control Circuit of Fig. 9 A.
Embodiment
Hereinafter with reference to relevant drawings, the driving method of a kind of according to the preferred embodiment of the invention pixel groups, two-d display panel and flat display apparatus is described, wherein identical element represents the Reference numeral with identical.
First, shown in Fig. 2, the pixel groups 1 being combined with pixel groups driving method of the present invention has the first viewing area 11 and the second viewing area 12, wherein, the first viewing area 11 couples with data line S1 and the first sweep trace G1, and the second viewing area 12 couples with data line S1, the first sweep trace G1 and the second sweep trace G2.This so-called " coupling ", be for example by the formed electrical connection of transmission of electric charge.In addition, in the present embodiment, the first viewing area 11 and the second viewing area 12 can be general alleged clear zone and dark space.
The first viewing area 11 has the first film transistor 111 and the first pixel capacitance 112.The second viewing area 12 has the second thin film transistor (TFT) 121, the 3rd thin film transistor (TFT) 122, the second pixel capacitance 123 and distributes electric capacity 124.Wherein, the first pixel capacitance 112 comprises the first liquid crystal capacitance C1 and the first storage capacitors C2, and the second pixel capacitance 123 comprises the second liquid crystal capacitance C3 and the second storage capacitors C4.
The first film transistor 111 couples with data line S1, the first sweep trace G1 and the first pixel capacitance 112 respectively; The second thin film transistor (TFT) 121 couples with data line S1, the first sweep trace G1 and the second pixel capacitance 123 respectively; The 3rd thin film transistor (TFT) 122 couples with the second sweep trace G2, the second pixel capacitance 123 and distribution electric capacity 124 respectively.
Refer again to shown in Fig. 3, according to the driving method of the pixel groups of the preferred embodiment of the present invention, comprise that step S01 is to step S02.Below explanation is more simultaneously with reference to Fig. 2 and Fig. 3.
Step S01 is apart from T at first o'clock
1in, via the first sweep trace G1, provide the first driving signal, and provide two driving signal with electric conduction, to be connected in the first film transistor 111 and the second thin film transistor (TFT) 121 of the first sweep trace G1 via the second sweep trace G2.In the present embodiment, by least one scan line drive circuit output first, drive signal to the first sweep trace G1, and export two driving signal to the second sweep trace G2.At the first driving signal and two driving signal, export to respectively after the first sweep trace G1 and the second sweep trace G2, by pixel data D
1by the first viewing area 11 and second viewing area 12 of data line S1 writing pixel group 1.Wherein, when being electrically connected on the first film transistor 111 of the first sweep trace G1 and the second thin film transistor (TFT) 121 conducting, pixel data D
1form with electric charge writes respectively the first pixel capacitance 112 and the second pixel capacitance 123 via the first film transistor 111 and the second thin film transistor (TFT) 121, now, and represent pixel data D
1the first voltage transmission to the first liquid crystal capacitance C1, the first storage capacitors C2, the second liquid crystal capacitance C3 and the second storage capacitors C4.
Step S02 is apart from T at second o'clock
2in, via the second sweep trace G2, provide the 3rd to drive signal with electric conduction, to be connected in the 3rd thin film transistor (TFT) 122 of the second sweep trace G2, the electric charge of the 3rd thin film transistor (TFT) 122 both sides is redistributed.When being electrically connected on the 3rd thin film transistor (TFT) 122 conducting of the second sweep trace G2, because the voltage of the second liquid crystal capacitance C3 and the second storage capacitors C4 is unequal with the voltage of distribution electric capacity 124, so electric charge can be redistributed, make the second liquid crystal capacitance C3, the second storage capacitors C4 and distribute the voltage of electric capacity 124 to be all second voltage.
Finally, the voltage of the first liquid crystal capacitance C1 is the first voltage, and the voltage of the second liquid crystal capacitance C3 is second voltage.Owing to controlling the 3rd, drive holding time and/or controlling the first voltage of signal, can control the ratio that is charged to the first voltage that distributes electric capacity 124, therefore can further adjust the pressure reduction △ V of the first voltage and second voltage.In addition, the On current of the 3rd thin film transistor (TFT) 122 can be designed to smaller value, makes above-mentioned control method can be easier to control.
When the glazed area of the first viewing area 11 and the glazed area of the second viewing area 12 equate, adjust pressure reduction △ V and can obtain different side-looking gamma curve, to improve display device, face the inconsistent phenomenon of gamma curve with side-looking.Shown in Fig. 7, for instance, when the voltage of the first liquid crystal capacitance C1 is 7V, (for example: wavelength is 550nm can obtain corresponding side-looking gamma curve; Phi angle is 60 degree, represents horizontal direction and panel normal direction folder 60 degree; Theta angle is 0 degree, represent vertical direction and panel normal direction folder 0 degree, this is polar coordinate representation), wherein, near the variation of the side-looking gamma curve that pressure reduction △ V is 1200mV gray-scale value 128 is too violent, during side-looking, easily produce the too unexpected situation of change color, preferably approximately to fall within pressure reduction △ V be between 650mV and 850mV to condition.It is worth mentioning that, due to side-looking gamma curve in the corresponding transmittance of high gray-scale value and low gray-scale value region, change very little, so when pixel groups 1 is wanted the color beyond display white and the colour of skin, can reduce pressure reduction △ V to increase brightness and contrast.
Fig. 8 shows the gamma curve schematic diagram of the corresponding different visual angles of different primary colors in the pixel groups of the preferred embodiment of the present invention.As shown in Figure 8, red green blue tricolor to face gamma curve almost overlapping, and compared to Fig. 1, blue side-looking gamma curve turning point (as shown in Fig. 1 dashed circle marked position) is than less obvious (gray-scale value 96～128 and gray-scale value 160～192), so the side-play amount of the side-looking gamma curve of red green blue tricolor is more approaching.
It is worth mentioning that, above-mentioned first o'clock apart from T
1represent pixel data D
1the write time of writing pixel group 1.In addition, in the present embodiment, as shown in Figure 4, first to drive the initial time of signal and the initial time of two driving signal can be simultaneously, and it holds time equally, but first drive the amplitude size of signal and two driving signal unequal.Also can be as shown in Figure 5 or Figure 6, the first driving initial time of signal and the initial time of two driving signal can be different, and it is unequal to hold time, but first drives the amplitude equal and opposite in direction of signal and two driving signal.These are only illustrative, the first initial time that drives signal and two driving signal, hold time and drive the permutation and combination of signal magnitude to be not limited only to above-mentioned permutation and combination form.
In addition, driving method according to a kind of two-d display panel of the preferred embodiment of the present invention, wherein two-d display panel is for example display panels, it has at least one pixel groups, the first sweep trace, the second sweep trace and data line, wherein pixel groups comprises a plurality of thin film transistor (TFT)s, and it is electrically connected to the first sweep trace, the second sweep trace and data line.Pixel groups has the first viewing area and the second viewing area, and the first viewing area and data line and the first sweep trace couple, and the second viewing area and data line, the first sweep trace and the second sweep trace couple.Because the driving method of two-d display panel is identical with the driving method of above-mentioned pixel groups, therefore repeat no more.
Moreover as shown in Figure 9 A, according to a kind of flat display apparatus 2 of the preferred embodiment of the present invention, wherein flat display apparatus 2 is for example liquid crystal indicator, it has two-d display panel 3, data drive circuit 4, scan drive circuit 5 and Drive and Control Circuit 6.Wherein the driving method of two-d display panel 3 is identical with the driving method of above-mentioned pixel groups, therefore repeat no more.
As shown in Figure 9 A, data drive circuit 4 is electrically connected on respectively two-d display panel 3 with scan drive circuit 5.Drive and Control Circuit 6 is electrically connected on respectively data drive circuit 4 and scan drive circuit 5, and wherein Drive and Control Circuit 6 has timing control unit 61 (Timing controller), storage unit 62 and adjustment unit 63.Input gray level S
itransfer to respectively timing control unit 61 and storage unit 62, wherein timing control unit 61 is according to input gray level S
icontrol data drive circuit 4 and scan drive circuit 5.
As shown in figure 10, the another kind of structure of its Drive and Control Circuit that is the preferred embodiment of the present invention.Different from Drive and Control Circuit 6, the Drive and Control Circuit 6a of flat display apparatus 2a also comprises delay cell 64, detecting unit 65 and control module 66.Detecting unit 65 receives input gray level S
ito calculate image features, control module 66 is according to input gray level S
iimage features with output control signal S
c2, adjustment unit 63 is according to control signal S
c2to adjust the waveform of the first driving signal and two driving signal.In addition, delay cell 64 is for making timing control unit 61 and adjustment unit 63 synchro control scan drive circuits 5.
In sum, the driving method of a kind of pixel groups of the present invention, two-d display panel and flat display apparatus, the thin film transistor (TFT) that while electric conduction is connected in two sweep traces in the write time of data, to adjust the transmissivity of the first viewing area and the second viewing area.Compared with prior art, the present invention utilizes the change of type of drive and can not increase under the prerequisite of data line, can improve display device and face the inconsistent phenomenon of gamma curve with side-looking, and only need the driving time of adjusting each sweep trace according to customer demand to distribute, can reach corresponding gamma curve demand, to make optimized adjustment for each gray scale, so can reduce cost and avoid aperture opening ratio to reduce, and then promote display quality.
The foregoing is only illustrative, but not be restrictive.Anyly do not depart from principle of the present invention and category, and the equivalent modifications that it is carried out or change all should be included in accompanying claim scope.
Claims (9)
1. a driving method, be used for driving pixel groups, wherein said pixel groups comprises a plurality of thin film transistor (TFT)s, described pixel groups has the first viewing area and the second viewing area, described the first viewing area and data line and the first sweep trace couple, described the second viewing area and described data line, described the first sweep trace and the second sweep trace couple, wherein said the first viewing area has the first film transistor and the first pixel capacitance, described the second viewing area has the second thin film transistor (TFT), the 3rd thin film transistor (TFT), the second pixel capacitance and distribution electric capacity, described the first film transistor respectively with described data line, described the first sweep trace and described the first pixel capacitance couple, described the second thin film transistor (TFT) respectively with described data line, described the first sweep trace and described the second pixel capacitance couple, described the 3rd thin film transistor (TFT) respectively with described the second sweep trace, described the second pixel capacitance and described distribution electric capacity couple, described driving method comprises the following steps:
In first o'clock distance, described the first sweep trace provides the first driving signal and described the second sweep trace to provide two driving signal with the first film transistor, described the second thin film transistor (TFT) and described the 3rd thin film transistor (TFT) described in conducting, and pixel data is write to described the first viewing area and described second viewing area of described pixel groups by described data line; And
Second o'clock apart from, described the second sweep trace provides the 3rd to drive signal to be connected in the described thin film transistor (TFT) on described the second sweep trace with electric conduction, and the electric charge of thin film transistor (TFT) both sides described in each is redistributed.
2. driving method according to claim 1, wherein said first drives the initial time of signal, the initial time of two driving signal and the described the 3rd drives the initial time while of signal or when different.
3. driving method according to claim 1, wherein said first drives signal, described two driving signal and described the 3rd driving signal equivalence or non-equivalence.
4. driving method according to claim 1, wherein said first drives holding time of the holding time of signal, described two driving signal to drive holding time of signal to equate with the described the 3rd or unequal.
5. driving method according to claim 1, wherein said first o'clock apart from write the write time of described pixel groups for described pixel data.
6. driving method according to claim 1, wherein, when being electrically connected on the described the first film transistor of described the first sweep trace and described the second thin film transistor (TFT) conducting, described pixel data writes respectively described the first pixel capacitance and described the second pixel capacitance via described the first film transistor and described the second thin film transistor (TFT).
7. driving method according to claim 6, wherein, when being electrically connected on described the 3rd thin film transistor (TFT) conducting of described the second sweep trace, the pixel data being stored in described the second pixel capacitance is sent to described distribution electric capacity gradually via described the 3rd thin film transistor (TFT).
8. driving method according to claim 1, wherein said the first pixel capacitance has the first liquid crystal capacitance and the first storage capacitors, and described the second pixel capacitance has the second liquid crystal capacitance and the second storage capacitors.
9. a driving method, be used for driving two-d display panel, wherein said two-d display panel has at least one pixel groups, one first sweep trace, one second sweep trace and a data line, wherein said pixel groups comprises a plurality of thin film transistor (TFT)s, described pixel groups has the first viewing area and the second viewing area, described the first viewing area and described data line and described the first sweep trace couple, described the second viewing area and described data line, described the first sweep trace and described the second sweep trace couple, wherein said the first viewing area has the first film transistor and the first pixel capacitance, described the second viewing area has the second thin film transistor (TFT), the 3rd thin film transistor (TFT), the second pixel capacitance and distribution electric capacity, described the first film transistor respectively with described data line, described the first sweep trace and described the first pixel capacitance couple, described the second thin film transistor (TFT) respectively with described data line, described the first sweep trace and described the second pixel capacitance couple, described the 3rd thin film transistor (TFT) respectively with described the second sweep trace, described the second pixel capacitance and described distribution electric capacity couple, described driving method comprises the following steps:
In first o'clock distance, described the first sweep trace provides the first driving signal and described the second sweep trace to provide two driving signal with the first film transistor, described the second thin film transistor (TFT) and described the 3rd thin film transistor (TFT) described in conducting, and pixel data is write to described the first viewing area and described second viewing area of described pixel groups by described data line; And
Second o'clock apart from, described the second sweep trace provides the 3rd to drive signal to be connected in the described thin film transistor (TFT) on described the second sweep trace with electric conduction, and the electric charge of thin film transistor (TFT) both sides described in each is redistributed.
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| CN101364401B (en) * | 2007-08-07 | 2014-01-22 | 群创光电股份有限公司 | Color management system and driving method thereof |
| CN103810949A (en) * | 2012-11-06 | 2014-05-21 | 群康科技(深圳)有限公司 | Display device |
| TWI505256B (en) * | 2013-08-06 | 2015-10-21 | Au Optronics Corp | Pixel driving method |
| TWI564860B (en) * | 2015-09-17 | 2017-01-01 | 友達光電股份有限公司 | Driving method for display panel |
| CN107516494A (en) * | 2017-07-21 | 2017-12-26 | 惠科股份有限公司 | The driving method of display panel drive device, display device and display panel |
| KR20200111215A (en) * | 2018-02-09 | 2020-09-28 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | How to drive the display device |
| CN109742108B (en) * | 2019-01-03 | 2020-12-01 | 京东方科技集团股份有限公司 | Display panel, manufacturing method thereof and display device |
| CN113219745B (en) * | 2021-04-20 | 2022-07-05 | 北海惠科光电技术有限公司 | Display panel, display device, and driving method of display panel |
| CN114677925A (en) * | 2022-03-07 | 2022-06-28 | 云谷（固安）科技有限公司 | Display panel and display device |
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| CN1773355A (en) * | 2004-11-08 | 2006-05-17 | 夏普株式会社 | Substrate of liquid crystal display device and liquid crystal display device with the same substrate and driving method |
| CN101025486A (en) * | 2006-02-22 | 2007-08-29 | 三星电子株式会社 | Liquid crystal display device having improved side visibility |
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| CN1773355A (en) * | 2004-11-08 | 2006-05-17 | 夏普株式会社 | Substrate of liquid crystal display device and liquid crystal display device with the same substrate and driving method |
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