CN101493614A - LCD panel - Google Patents
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- CN101493614A CN101493614A CNA2008100046936A CN200810004693A CN101493614A CN 101493614 A CN101493614 A CN 101493614A CN A2008100046936 A CNA2008100046936 A CN A2008100046936A CN 200810004693 A CN200810004693 A CN 200810004693A CN 101493614 A CN101493614 A CN 101493614A
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Abstract
The invention discloses a liquid crystal display panel, which improves the phenomenon of color divergence by dividing a pixel into two sub-pixels and using a memory voltage signal to adjust the gray scale of one sub-pixel. The liquid crystal display panel only requires one memory voltage signal, thus effectively reducing the use number of the circumferential signal wiring, and further reducing the layout area and the production cost of the liquid crystal display panel.
Description
Technical field
The invention relates to a kind of display panels, and particularly relevant for a kind of display panels that utilizes single stored voltage signal to improve the image colour cast of each pixel.
Background technology
For allow LCD (Liquid Crystal Display LCD) has better display quality, at present LCD all towards the height contrast, characteristics such as colour cast is little, brightness is high, high color saturation, rapid reaction and wide viewing angle develop.With the wide viewing angle technology, generally be to adopt multidomain vertical alignment type (multi-domainvertically alignment, MVA) LCD.But, when the user when LCD is watched at bigger visual angle, being seen image can produce the color phenomenon of white (color washout) partially usually, this is the image colour cast.Wherein, the formation reason of image colour cast is, as the gamma curve synoptic diagram of the available liquid crystal display panel that Fig. 1 illustrated, be the ideal curve of observing from forward at this gamma curve 110, and gamma curve 120 is the curve from oblique observation.As shown in Figure 1, during from oblique observation image, gamma curve 120 can seriously depart from gamma curve 110, thereby has produced the phenomenon of image colour cast.
In order to address the above problem, U.S. Patent application discloses No. 20040001167 in early days and has proposed a kind of pixel, and wherein Fig. 2 illustrates the structural representation of the pixel of prior art for this reason, and Fig. 3 illustrates in order to the signal timing diagram of this prior art to be described.Please be simultaneously with reference to Fig. 2 and Fig. 3, the pixel 200 that this prior art proposed is made of two sub-pixels 210 and 220, wherein sub-pixel 210 comprises switch SW 21, liquid crystal capacitance CL21 and storage capacitors CS21, and sub-pixel 220 then comprises switch SW 22, liquid crystal capacitance CL22 and storage capacitors CS22.
At this, sub-pixel 210 and 220 is the signal VG that transmitted by by scan wiring GLm and data wiring SLn
mWith source signal VS
nDrive.In order to reduce the phenomenon of image colour cast, this prior art is electrically connected to storage capacitors distribution SPLm and SNLm respectively with storage capacitors CS21 and CS22, to utilize stored voltage signal VP
mWith VN
mCome the quantity of electric charge of modulation storage capacitors CS21 and CS22.As stored voltage signal VP
mPotential change one voltage difference delta V
SP2The time, be stored in the reverse signal VL in the liquid crystal capacitance CL21
21, also will produce a voltage difference delta V
LC2, voltage difference delta V wherein
LC2=Δ V
SP2* CS21/ (CL21+CS21).By that analogy, be stored in reverse signal VL among the liquid crystal capacitance CL22
22That is to say that this prior art can be by adjusting stored voltage signal VP
mWith VN
mCurrent potential, revise the gray scale of sub-pixel 210 and 220, and then improve the phenomenon of image colour cast.
Fig. 4 illustrates the synoptic diagram into the available liquid crystal display panel 400 that adopts pixel 200.Wherein, available liquid crystal display panel 400 comprises the pixel column unit 421～426 (representing with equivalent electrical circuit) that is configured in the pixel array region 410, and is configured in the peripheral signal wiring 431～436 (figure represents with practical layout) outside the pixel array region 410.At this, pixel column unit 421～426 comprises most pixels separately, and the inner structure of those pixels is identical with the inner structure of pixel 200 (being plotted in Fig. 2).For example, the pixel 441～443 in the pixel column unit 421, its inner structure is identical with pixel 200 (being plotted in Fig. 2).
On practical layout, pixel 200 (being plotted in Fig. 2) also need use the gray scale that two storage capacitors distributions are proofreaied and correct its inner sub-pixel 210 and 220 except using a scan wiring and a data wiring drive.So when liquid available liquid crystal display panel 400 adopts pixel 200 (being plotted in Fig. 2) for display element, pixel column unit 421～426 is except utilizing scan wiring GL1～GL6 and data wiring SL41～SL43 drive, also need pass through storage capacitors distribution 451～456 and 461～466, come to be electrically connected with pairing peripheral signal wiring 431～436, wherein each storage capacitors distribution comes to be electrically connected with pairing peripheral signal wiring 431～436 by by a contact hole (for example contact hole 471 that has indicated).Whereby, pixel column unit 421～426 can receive pairing stored voltage signal by peripheral signal wiring 431～436, and then revise the gray scale of its interior pixels.
Under the driving force of weighing the stored voltage signal, display panels 400 adopts the mode of most bars periphery signal wirings 431～436, provides pixel column unit 421～426 required stored voltage signal.Yet in practical layout, the formed late effect of stray capacitance and dead resistance but can influence the effect of improving of image colour cast.At this moment, prior art can utilize the width that strengthens peripheral signal wiring 431～436 to improve late effect.But this kind practice but will increase the layout area of display panels 400.In addition, prior art also can be improved late effect by the thickness that increases peripheral signal wiring 431～436 by the process technique of change display panels 400.Yet this kind practice but can cause the production cost of display panels 400 to increase and production efficiency reduces.
Summary of the invention
The invention provides a kind of display panels, utilize single stored voltage signal to come the gray scale of each pixel of modulation, and then improve the phenomenon and the use number that reduces peripheral signal wiring of image colour cast effectively.
The present invention proposes a kind of display panels, comprises N first pixel column unit and N+1 bar periphery signal wiring.Wherein, N the first pixel column configuration of cells is in pixel array region, and it is overseas that N+1 bar periphery signal wiring then is configured in pixel array region.In addition, N the first pixel column unit drives by the signal that N bar first scan wiring and most bar data wiring are transmitted, and, proofread and correct its corresponding gray scale by the signal that N bar first storage capacitors distribution and the N bar first common current potential distribution are transmitted, wherein N is the integer greater than 0.
At this, because the 1st electrically connects with the N bar first storage capacitors distribution respectively to N bar periphery signal wiring, and N+1 bar periphery signal wiring is electrically connected to the above-mentioned N bar first common current potential distribution, so display panels of the present invention can will hang down the use number of peripheral signal wiring effectively.
In display panels of the present invention, above-mentioned N the first pixel column unit comprises most first pixels separately, and each first pixel in the individual first pixel column unit of s, in order to its gray scale of modulating signal of being transmitted according to the s bar first storage capacitors distribution, s is integer and 1≤s≤N.
In display panels of the present invention, above-mentioned display panels also comprises N the second pixel column unit that is configured in the pixel array region.Wherein, N the second pixel column unit drives by the signal that N bar second storage capacitors distribution and the N bar second common current potential distribution are transmitted, and, proofread and correct its corresponding gray scale by the signal that N bar second storage capacitors distribution and the N bar second common current potential distribution are transmitted.
What deserves to be mentioned is that the second storage capacitors distribution electrically connects to N bar periphery signal wiring with the 1st respectively, and the N bar second common current potential distribution is electrically connected to N+1 bar periphery signal wiring.In addition, the second pixel column unit is identical with the inner structure of the first pixel column unit.
The present invention comes the gray scale of each pixel of modulation because of utilizing single stored voltage signal, so and prior art in comparison, the present invention also can reduce the layout area and the production cost of display panels by reducing the use number of peripheral signal wiring except improving the phenomenon of image colour cast.
Description of drawings
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, below in conjunction with accompanying drawing the specific embodiment of the present invention is elaborated, wherein:
Fig. 1 illustrates the gamma curve synoptic diagram into the available liquid crystal display panel.
Fig. 2 illustrates the structural representation into the pixel 200 of prior art.
Fig. 3 illustrates and is the signal timing diagram in order to key diagram 2 prior aries.
Fig. 4 illustrates to the synoptic diagram of pixel 200 as the available liquid crystal display panel 400 of display element.
Fig. 5 illustrates the structural representation into the pixel 500 of foundation one embodiment of the invention.
Fig. 6 illustrates and is the signal timing diagram in order to key diagram 5 embodiment.
Fig. 7 illustrates to the synoptic diagram of pixel 500 as the display panels 700 of display element.
Fig. 8～Figure 11 illustrates the partial schematic diagram into Fig. 7 embodiment.
The main element symbol description:
110,120: gamma curve
200,441～443,500,731～733: pixel
210,220,510,520: sub-pixel
SW21, SW22, SW51, SW52: switch
CL21, CL22, CL51, CL52: liquid crystal capacitance
CS21, CS22, CS51, CS52: storage capacitors
400,700: display panels
410,701: pixel array region
421～426,711a～711n, 712a～712n: pixel column unit
431～436,720a～720n+1: peripheral signal wiring
SPLm, SNLm, WL5,451～456,461～466,741a～741n, 742a～742n: storage capacitors distribution
471,721: contact hole
SLn, SLn+1, SL41～SL43, SL5, SL1～SL3: data wiring
GLm, GL1～GL6, GL5, GL1a～GL1n, GL2a～GL2n: scan wiring
TL5,751a～751n, 752a～752n: common current potential distribution
VP
m, VN
m: the stored voltage signal
VG
m, VG
5: signal
VS
n, VS
5: source signal
VL
21, VL
22, VL
51, VL
52: reverse signal
Δ V
SP2, Δ V
LC2, Δ V
SP5, Δ V
LC5: voltage difference
V
Com: common electric voltage
VD
5: the stored voltage signal
Wd81, Wd82, Wd91, Wd92, Wd11: width
Embodiment
Major technique of the present invention is characterized as a pixel is divided into two sub-pixels, and utilizes the gray scale of one of them sub-pixel of modulation to improve the phenomenon of image colour cast, reduces the use number of peripheral signal wiring whereby effectively.Below will enumerate explanation display panels of the present invention, but it is not in order to limit the present invention, have the knack of this operator and can modify slightly following embodiment according to spirit of the present invention, but it still to belong to scope of the present invention.
Before describing display panels, below explain orally earlier at the pixel in the display panels.Fig. 5 illustrates the structural representation into the pixel 500 of foundation one embodiment of the invention.Please refer to Fig. 5, pixel 500 comprises sub-pixel 510 and 520, and sub-pixel 510 comprises switch SW 51, liquid crystal capacitance CL51 and storage capacitors CS51.Sub-pixel 520 comprises switch SW 52, liquid crystal capacitance CL52 and storage capacitors CS52.Wherein, switch SW 51 is respectively a thin film transistor (TFT) with SW52.
Please continue with reference to Fig. 5, switch SW 51 is electrically connected to data wiring SL5 with first end of SW52, and its control end all is electrically connected to scan wiring GL5.Liquid crystal capacitance CL51 is electrically connected to second end and the common electric voltage V of switch SW 51
Com(for example: the common electric voltage of display panels).Storage capacitors CS51 is electrically connected between second end and storage capacitors distribution WL5 of switch SW 51.And liquid crystal capacitance CL52 is electrically connected to second end and the common electric voltage V of switch SW 52
Com, and second end that storage capacitors CS52 is electrically connected at switch SW 52 is switched between the distribution TL5 together.
Fig. 6 illustrates and is the signal timing diagram in order to key diagram 5 embodiment, please be simultaneously with reference to Fig. 5 and Fig. 6.At this, sub-pixel 510 and 520 drives by scan wiring GL5 and data wiring SL5 jointly.In the process that drives, the signal VG that sub-pixel 510 and 520 meetings are transmitted by scan wiring GL5
5, decide the conducting state of switch SW 51 and SW52, with the source signal VS that causes data wiring SL5 to be transmitted
5Can in time discharge and recharge liquid crystal capacitance CL51～CL52 and storage capacitors CS51～CS52.
In order to reduce the phenomenon of image colour cast, sub-pixel 520 receives common electric voltage V by common current potential distribution TL5
Com, so that be stored in the interior reverse signal VL of liquid crystal capacitance CL52
52, only along with source signal VS
5Change and change its current potential.In addition, sub-pixel 510 receives a stored voltage signal VD by storage capacitors distribution WL5
5, to utilize stored voltage signal VD
5Come the quantity of electric charge of modulation storage capacitors CS51 and liquid crystal capacitance CL51.For example, as stored voltage signal VD
5Potential change one voltage difference delta V
SP5The time, be stored in the reverse signal VL in the liquid crystal capacitance CL51
51, also will produce a voltage difference delta V
LC5=0.5* Δ V
SP5* CS51/ (CL51+CS51).
At this, though only be stored in the interior reverse signal VL of liquid crystal capacitance CL51
51, can be along with stored voltage signal VD
5Change and change its current potential, that is to say to have only the gray scale of sub-pixel 510 can be along with stored voltage signal VD
5Change and change.But, mix because the gray scale of pixel 500 is gray scales by sub-pixel 510 and 520.So the gray scale of working as sub-pixel 510 is along with stored voltage signal VD
5During change, the gray scale of pixel 500 also will change thereupon.That is to say that pixel 500 can be according to stored voltage signal VD
5Its gray scale of modulation, and then improve the problem of image colour cast.
Fig. 7 illustrates to the synoptic diagram of pixel 500 as the display panels 700 of display element.Please refer to Fig. 7, display panels 700 comprises that most pixel column unit (represent that with equivalent electrical circuit with N+1 bar periphery signal wiring 720a～720n+1 (figure represents with practical layout), wherein N is the integer greater than 0.At this, each the pixel column configuration of cells in the display panels 700 is in pixel array region 701, and peripheral signal wiring 720a～720n+1 is configured in outside the pixel array region 701.In addition, present embodiment is considered as one group mode with every N pixel column unit, and 720a～720n+1 is corresponding mutually with N+1 bar periphery signal wiring.For example, Fig. 7 is considered as one group with N pixel column unit 711a～711n, and N pixel column unit 712a～712n is considered as another group.
Please continue with reference to Fig. 7, pixel column unit 711a～711n comprises most pixels, and the inner structure of those pixels all the inner structure with pixel 500 (being plotted in Fig. 5) is identical.For example, pixel column unit 711a comprises pixel 731～733.Because pixel 731～733 is identical with the inner structure of pixel 500, so pixel 731 is electrically connected to a scan wiring GL1a, data wiring SL1, a storage capacitors distribution 741a and a common current potential distribution 751a.Similarly, pixel 732 is electrically connected to a scan wiring GL1a, data wiring SL2, a storage capacitors distribution 741a and a common current potential distribution 751a.By that analogy, the electric connection mode of each pixel among pixel column unit 711a～711n.
In addition, peripheral signal wiring 720a is electrically connected to storage capacitors distribution 741a, and peripheral signal wiring 720b is electrically connected to storage capacitors distribution 741b, and peripheral signal wiring 720n+1 is electrically connected to common current potential distribution 751a～751n.By that analogy, the electric connection mode of other peripheral signal wiring.In addition, peripheral signal wiring 720a～720n+1 is parallel to each other, and vertical mutually with the storage capacitors distribution 741a～741n that belongs to different layers.Wherein, each peripheral signal wiring is by a contact hole (for example contact hole 721 that has indicated), and storage capacitors distribution pairing with it or common current potential distribution are electrically connected.
At this, peripheral signal wiring 720a～720n does not join on electrically mutually, and peripheral signal wiring 720a～720n receives a stored voltage signal separately.Whereby, the stored voltage signal that pixel column unit 711a～711n can be transmitted by peripheral signal wiring 720a～720n comes the gray scale of its interior pixels of modulation.For example, pixel 731 drives by the signal that scan wiring GL1a and data wiring SL1 are transmitted.And because peripheral signal wiring 720a is electrically connected to storage capacitors distribution 741a, so its gray scale of modulating signal that pixel 731 can utilize storage capacitors distribution 741a to be transmitted.By that analogy, the principle of work of each pixel among pixel column unit 711a～711n.
That is to say, outside the signal that pixel column unit 711a～711n is transmitted by N bar scan wiring GL1a～GL1n and data wiring SL1～SL3 drives, and, come correction pixels column unit 711a～711n corresponding gray scale by the signal that storage capacitors distribution 741a～741n and common current potential distribution 751a～751n are transmitted.So compared with prior art, present embodiment only need use less peripheral signal wiring, just can reach the phenomenon of improving the image colour cast.
Similarly, because the inner structure of pixel column unit 712a～712n is identical with pixel column unit 711a～711n, so pixel column unit 712a～712n also can drive by the signal that N bar scan wiring GL2a～GL2n and data wiring SL1～SL3 are transmitted, and, come correction pixels column unit 712a～712n corresponding gray scale by the signal that N bar storage capacitors distribution 742a～742n and the common current potential distribution of N bar 752a～752n are transmitted.Wherein, N bar storage capacitors distribution 742a～742n can be electrically connected to N bar periphery signal wiring 720a～720n accordingly, and the common current potential distribution of N bar 752a～752n can be electrically connected to peripheral signal wiring 720n+ 1.
It should be noted that the cause that reduces owing to peripheral signal wiring, so at stray capacitance and the formed late effect of dead resistance, present embodiment can reduce late effect to improving the influence of image colour cast by the width that increases peripheral signal wiring.For example, if be example (N=5) with 6 among Fig. 7 embodiment peripheral signal wiring 720a～720f, and be depicted as shown in Figure 8.Wherein, the width of peripheral signal wiring 720a～720f is Wd81, and the width of two adjacent peripheral signal wirings is Wd82.At this, as shown in Figure 9, in order to reduce the formed late effect of peripheral signal wiring 720a～720f, Fig. 8 embodiment can be modified as width W d91 by the width W d81 with peripheral signal wiring 720a～720f, avoid the formation of late effect whereby, wherein width W d91＞width W d81.Relatively, increase along with the width W d81 of peripheral signal wiring 720a～720f, the width W d82 of two adjacent peripheral signal wirings will diminish accordingly, thus the width W d92 of two adjacent peripheral signal wirings among Fig. 9, will be less than the width W d82 of two adjacent peripheral signal wirings among Fig. 8.
In addition, compared with prior art, if prior art need adopt 2N bar periphery signal wiring, then present embodiment then only needs (N+1) bar periphery signal wiring just can reach effect same as the prior art.That is to say that present embodiment can reduce the layout area of display panels effectively.Relatively, if prior art is used identical layout area with present embodiment, then prior art is under the situation that adopts 2N bar periphery signal wiring, and the layout area that present embodiment then can be identical is realized 2N+1 bar periphery signal wiring.That is to say that as shown in figure 10, under present embodiment employing layout area same as the prior art, Fig. 8 embodiment can increase to 11 peripheral signal wiring 720a～720k as shown in figure 10 with 6 peripheral signal wiring 720a～720f.Whereby, promote the driving force of stored voltage signal, and then strengthen the effect of improving of image colour cast.Moreover as shown in figure 11, Fig. 8 embodiment also can be modified as width W d11 with the width W d82 of script two adjacent peripheral signal wirings, the convenience when improving layout periphery signal wiring whereby, wherein width W d11＞width W d82.
In sum, the present invention is divided into two sub-pixels with a pixel, and utilizes the gray scale of one of them sub-pixel of modulation, improves the phenomenon of image colour cast.In other words, because the present invention only need use a stored voltage to interrogate the gray scale of modulation pixel, thus can reduce the use number of peripheral signal wiring effectively, and then reduce the layout area and the production cost of display panels.
Though the present invention discloses as above with preferred embodiment; right its is not in order to qualification the present invention, any those skilled in the art, without departing from the spirit and scope of the present invention; when can doing a little modification and perfect, so protection scope of the present invention is when with being as the criterion that claims were defined.
Claims (8)
1. display panels comprises:
N the first pixel column unit, be configured in the pixel array region, those first pixel column unit drive by the signal that N bar first scan wiring and most bar data wiring are transmitted, and the signal that is transmitted by N bar first storage capacitors distribution and the N bar first common current potential distribution, proofread and correct those first pixel column unit corresponding gray scale, wherein N is the integer greater than 0; And
N+1 bar periphery signal wiring, it is overseas to be configured in this pixel array region, and wherein, the 1st electrically connects with those first storage capacitors distributions respectively to N bar periphery signal wiring, and N+1 bar periphery signal wiring is electrically connected to those first common current potential distributions.
2. display panels as claimed in claim 1, it is characterized in that, those first pixel column unit comprise most first pixels separately, and each those first pixel in the individual first pixel column unit of s, in order to its gray scale of modulating signal of being transmitted according to the s bar first storage capacitors distribution, s is integer and 1≤s≤N.
3. display panels as claimed in claim 2 is characterized in that, t the first pixel PI in the individual first pixel column unit of s (s t) comprising:
One first sub-pixel drives by s bar first scan wiring and t bar data wiring, and this first sub-pixel receives a stored voltage signal by the s bar first storage capacitors distribution; And
One second sub-pixel drives by s bar first scan wiring and t bar data wiring, and this second sub-pixel receives the common electric voltage of this display panels by the s bar first common current potential distribution,
Wherein, (s, t) according to this its gray scale of stored voltage modulating signal, and t is the integer greater than 0 to this first pixel PI.
4. display panels as claimed in claim 3 is characterized in that, this first sub-pixel comprises:
One first switch, its first end is electrically connected to t bar data wiring, and the control end of this first switch is electrically connected to s bar first scan wiring;
One first liquid crystal capacitance is electrically connected to second end of this first switch and the common electric voltage of this display panels; And
One first storage capacitors is electrically connected between second end and the s bar first storage capacitors distribution of this first switch.
5. display panels as claimed in claim 3 is characterized in that, this second sub-pixel comprises:
One second switch, its first end is electrically connected to t bar data wiring, and the control end of this second switch is electrically connected to s bar first scan wiring;
One second liquid crystal capacitance is electrically connected to second end of this second switch and the common electric voltage of this display panels; And
One second storage capacitors is electrically connected between second end and the s bar first common current potential distribution of this second switch.
6. display panels as claimed in claim 1 is characterized in that, those peripheral signal wirings are parallel to each other, and vertical mutually with those first storage capacitors distributions that belong to different layers.
7. display panels as claimed in claim 1 is characterized in that, also comprises:
N the second pixel column unit, be configured in this pixel array region, those second pixel column unit drive by the signal that N bar second scan wiring and those data wirings transmitted, and the signal that is transmitted by N bar second storage capacitors distribution and the N bar second common current potential distribution, proofread and correct those second pixel column unit corresponding gray scale
Wherein, those second storage capacitors distributions electrically connect to N bar periphery signal wiring with the 1st respectively, and those second common current potential distributions are electrically connected to N+1 bar periphery signal wiring.
8. display panels as claimed in claim 7 is characterized in that, those second pixel column unit are identical with the inner structure of those first pixel column unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100046936A CN101493614A (en) | 2008-01-21 | 2008-01-21 | LCD panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100046936A CN101493614A (en) | 2008-01-21 | 2008-01-21 | LCD panel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101493614A true CN101493614A (en) | 2009-07-29 |
Family
ID=40924271
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100046936A Pending CN101493614A (en) | 2008-01-21 | 2008-01-21 | LCD panel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10109235B2 (en) | 2015-04-23 | 2018-10-23 | Everdisplay Optronics (Shanghai) Limited | Compensation circuit, AMOLED structure and display device |
| WO2020093528A1 (en) * | 2018-11-05 | 2020-05-14 | 惠科股份有限公司 | Display panel drive method, drive device and display device |
-
2008
- 2008-01-21 CN CNA2008100046936A patent/CN101493614A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10109235B2 (en) | 2015-04-23 | 2018-10-23 | Everdisplay Optronics (Shanghai) Limited | Compensation circuit, AMOLED structure and display device |
| WO2020093528A1 (en) * | 2018-11-05 | 2020-05-14 | 惠科股份有限公司 | Display panel drive method, drive device and display device |
| US11322103B2 (en) | 2018-11-05 | 2022-05-03 | HKC Corporation Limited | Driving method and driving device of display panel and display device |
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Open date: 20090729 |