CN104614901A - Pixel structure for liquid crystal display - Google Patents
Pixel structure for liquid crystal display Download PDFInfo
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- CN104614901A CN104614901A CN201510070709.3A CN201510070709A CN104614901A CN 104614901 A CN104614901 A CN 104614901A CN 201510070709 A CN201510070709 A CN 201510070709A CN 104614901 A CN104614901 A CN 104614901A
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- liquid crystal
- voltage
- crystal display
- counter electrode
- dot structure
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1343—Electrodes
- G02F1/13439—Electrodes characterised by their electrical, optical, physical properties; materials therefor; method of making
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- Mathematical Physics (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Liquid Crystal (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
Abstract
The invention provides a pixel structure for a liquid crystal display. The pixel structure for the liquid crystal display comprises a first substrate, a second substrate and a liquid crystal layer, wherein the liquid crystal layer is positioned between the first substrate and the second substrate; the second substrate is provided with a plurality of pixel electrodes, at least one scanning line, at least one data line, at least one common electrode and a balancing electrode; the pixel electrodes are arrayed in a matrix manner; the scanning lines are arranged on a first metal layer and extend along the horizontal direction; the data lines are arranged on a second metal layer and extend along the vertical direction; the data lines and the scanning lines are staggered; the common electrodes are electrically coupled to a first direct-current voltage; the balancing electrode is parallel to the scanning lines; at least one part of the balancing electrode and the scanning lines are overlapped; the balancing electrode is electrically coupled to a second direct-current voltage; and the square resistance value of the balancing electrode ranges from 0.25 omega/square to 15 omega/square. Compared with the prior art, the pixel structure has the advantages that the uniformity of the common electrodes can be improved by difference between coupling of signals at an edge of a panel of the balancing electrode and signals in the center of the panel of the balancing electrode.
Description
Technical field
The present invention relates to a kind of liquid crystal display, particularly relate to a kind of dot structure for liquid crystal display.
Background technology
In traditional active matric-type liquid crystal display, each pixel has a thin film transistor (TFT), and its grid is connected to the sweep trace of horizontal direction, and its source electrode is connected to the data line of vertical direction, and its drain electrode is connected to pixel electrode.For the picture element array structure containing a lot of pixel, on same sweep trace in the horizontal direction, the grid of all thin film transistor (TFT)s all links together, so applying voltage is interlock, such as, certain scan line applies enough large positive voltage, all thin film transistor (TFT)s then on this sweep trace all can be opened, and the pixel electrode on this sweep trace also can be electrically connected with the data line of vertical direction, and send into corresponding picture signal via data line, so that pixel electrode is charged to suitable voltage.Then, apply enough large negative voltage, all thin film transistor (TFT)s on sweep trace cut out, until re-write signal again next time, its chien shih electric charge is kept on liquid crystal capacitance.Now, restart next horizontal scanning line, send into corresponding picture signal, so sequentially the image signal data of whole picture is write, more again re-write from Article 1 sweep trace.
In addition, liquid crystal panel also comprises a common electric voltage driving circuit, be used to provide a common electric voltage (common voltage), between the pixel electrode and common electric voltage of each pixel cell, be formed with liquid crystal capacitance, the potential difference (PD) between pixel electrode and common electric voltage is referred to as pixel voltage.The yawing moment of liquid crystal molecule can change along with the voltage be carried between pixel electrode and common electric voltage and change, thus controls the light percent of pass of liquid crystal layer, and then the brightness of each pixel cell of control liquid crystal display.But one of thing followed problem is, easily there is common electric voltage situation pockety in liquid crystal panel, and this can cause liquid crystal panel to produce many defects such as film flicker (flicker) and luminance brightness homogeneity.In general, affect common electric voltage homogeneity and mainly comprise two reasons: first feed-trough voltage, when panel pair drives, because face plate edge is different with the resistance capacitance load of panel zone line, that causes RC to postpone is also different.Such as, in the region of the closer signal source of face plate edge, its waveform comparatively close to square wave, and in the panel between region, because distance signal source is far away, it is comparatively serious that its waveform is postponed by RC, when thin film transistor (TFT) cuts out, enters charge conservation state, capacitance partial pressure, delay waveform in various degree causes the feed-trough voltage of different size, comparatively large at the feed-trough voltage of face plate edge, and in the panel between the feed-trough voltage in region less; It two is that common electric voltage on array base palte defines coupling effect, when the gate switch of thin film transistor (TFT), the common electric voltage in face plate edge region is less by the impact of grid voltage, but the closer to face plate center, the impact that common electric voltage is subject to grid voltage is larger.Thus, when grid is closed, the waveform of common electric voltage is coupled by grid voltage and occurs declining, and voltage is diminished, and the voltage difference between the pixel electrode of liquid crystal capacitance and common electrode can become large, thus pixel voltage face plate edge region less and in the panel between region larger.Although the homogeneity of common electric voltage can be improved by gate waveform top rake, top rake degree is charged and the restriction of driving chip itself, improves effectiveness comparison limited.
In view of this, how to design a kind of new picture element array structure or existing picture element array structure is improved, effectively to improve the fringe region of common electric voltage at liquid crystal panel and the homogeneity of zone line, it is the problem that person skilled is urgently to be resolved hurrily in the industry.
Summary of the invention
For the above-mentioned defect existing for the dot structure for liquid crystal display of the prior art, that the invention provides a kind of novelty, that common electric voltage homogeneity can be improved dot structure.
According to one aspect of the present invention, provide a kind of dot structure for liquid crystal display, described dot structure comprises a first substrate, a second substrate and the liquid crystal layer between described first substrate and described second substrate, wherein, described second substrate and described first substrate are oppositely arranged, and have:
Multiple pixel electrode, is arranged in described second substrate in rectangular;
At least one sweep trace, is arranged at a first metal layer and extends in the horizontal direction;
At least one data line, is arranged at one second metal level and vertically extends, and described data line and described sweep trace are crisscross arranged;
At least one common electrode, is electrically coupled to one first DC voltage; And
One counter electrode, parallel with described sweep trace and overlapping at least partly, described counter electrode is electrically coupled to one second DC voltage,
Wherein, the sheet resistance value of described counter electrode between 0.25 ~ 15 Ω/, described dot structure by described counter electrode at the signal couple different of face plate edge and face plate center to improve the uniformity coefficient of described common electrode.
An embodiment wherein, the resistance of described counter electrode is 10 ~ 700 times of the resistance of described sweep trace.
An embodiment wherein, the RC value of described counter electrode is 10 ~ 220 times of the RC value of sweep trace.
An embodiment wherein, described counter electrode is nano silver wire (silver nanowire) or Nano Silver metal grill (metal mesh).
An embodiment wherein, described first DC voltage is provided by different signal wires respectively from described second DC voltage.
An embodiment wherein, described first DC voltage and described second DC voltage are provided by same signal wire, and described first DC voltage equals described second DC voltage.
An embodiment wherein, described counter electrode is electrically coupled to a transparency conducting layer via a via hole, and described transparency conducting layer and described pixel electrode are positioned at same layer.
An embodiment wherein, described counter electrode is electrically coupled to an intermediate conductive layer via a via hole, and described intermediate conductive layer and described pixel electrode overlap.
An embodiment wherein, described counter electrode comprises discontinuous multiple compensation section, and described compensation section is positioned at described second metal level, and couples mutually with electrically conducting transparent material via via hole between adjacent compensation section.
An embodiment wherein, described pixel electrode is tin indium oxide material.
Adopt the dot structure for liquid crystal display of the present invention, its sweep trace is arranged at a first metal layer and extends in the horizontal direction, its data line is arranged at one second metal level and vertically extends, above-mentioned data line and above-mentioned sweep trace are crisscross arranged, common electrode is electrically coupled to one first DC voltage, and counter electrode is parallel with sweep trace and overlapping at least partly, this counter electrode is electrically coupled to one second DC voltage.Compared to prior art, dot structure of the present invention by counter electrode at the signal couple different of face plate edge and face plate center to improve the uniformity coefficient of common electrode.
Accompanying drawing explanation
Reader, after having read the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein,
Fig. 1 illustrates one first embodiment according to the dot structure for liquid crystal display of the present invention;
When Fig. 2 (a) and Fig. 2 (b) illustrates the dot structure adopting Fig. 1 respectively, pixel voltage and counter electrode voltage change schematic diagram along with thin film transistor (TFT) is opened with voltage waveform when turning off;
When Fig. 3 (a) and Fig. 3 (b) illustrate the dot structure adopting Fig. 1 respectively, the pixel voltage being positioned at face plate edge region and the pixel voltage the being positioned at face plate center region schematic equivalent circuit based on the load effect of counter electrode thus when being coupled by sweep trace;
Fig. 4 illustrates one second embodiment according to the dot structure for liquid crystal display of the present invention;
Fig. 5 illustrates one the 3rd embodiment according to the dot structure for liquid crystal display of the present invention;
Fig. 6 illustrates one the 4th embodiment according to the dot structure for liquid crystal display of the present invention; And
Fig. 7 illustrates one the 5th embodiment according to the dot structure for liquid crystal display of the present invention.
Embodiment
The technology contents disclosed to make the application is more detailed and complete, and can refer to accompanying drawing and following various specific embodiment of the present invention, mark identical in accompanying drawing represents same or analogous assembly.But those of ordinary skill in the art should be appreciated that hereinafter provided embodiment is not used for limiting the scope that contains of the present invention.In addition, accompanying drawing, only for being schematically illustrated, is not drawn according to its life size.
With reference to the accompanying drawings, the embodiment of various aspects of the present invention is described in further detail.
Fig. 1 illustrates one first embodiment according to the dot structure for liquid crystal display of the present invention.With reference to Fig. 1, similar with the dot structure of existing most of liquid crystal display, dot structure of the present invention comprises a first substrate, a second substrate and the liquid crystal layer (not shown) between first substrate and second substrate.Second substrate and first substrate are oppositely arranged, such as, first substrate is color filter glass substrate (color filter glass substrate), and second substrate is thin-film transistor array base-plate (thin film transistor array substrate).It will be understood by those of skill in the art that dot structure of the present invention lays particular emphasis on and carry out improvement design to the framework of second substrate, thus the associated description of first substrate does not repeat them here.
As shown in Figure 1, second substrate comprises multiple pixel electrode 100, at least one sweep trace 102, at least one data line 104, at least one common electrode 106 and a counter electrode 108.Such as, this pixel electrode 100 is tin indium oxide (ITO) material.
Specifically, multiple pixel electrode 100 is arranged on second substrate in rectangular.Sweep trace 102 is arranged at a first metal layer (also can be described as M1 layer, not shown) and extends in the horizontal direction.Data line 104 is arranged at one second metal level (also can be described as M2 layer, not shown) and vertically extends.Data line 104 and sweep trace 102 are crisscross arranged.Common electrode 106 is electrically coupled to one first DC voltage U1, in order to provide common electric voltage to each pixel.
As stated in the Background Art, in existing dot structure, when the gate switch of the thin film transistor (TFT) on array base palte, the common electric voltage in face plate edge region is less by the impact of grid voltage; And the closer to face plate center, the impact that common electric voltage is subject to grid voltage is larger.Therefore, when grid is closed, the waveform of common electric voltage is coupled by grid voltage and occurs declining, voltage difference between the pixel electrode that liquid crystal capacitance two ends are connected and common electrode can become large, and pixel voltage face plate edge region less and in the panel between region comparatively large, affect the quality that picture shows.
In order to effectively solve this puzzlement, dot structure of the present invention is specially provided with counter electrode 108, and it is parallel to each other with sweep trace 102 and overlapping at least partly.This counter electrode 108 is electrically coupled to one second DC voltage U2.In FIG, the first DC voltage U1 is provided by different signal wires respectively from the second DC voltage U2, and the first DC voltage U1 is not equal to the second DC voltage U2.And the sheet resistance value of this counter electrode must between 0.25 ~ 15 Ω/, make this dot structure can by counter electrode 108 at the signal couple different of face plate edge and face plate center to improve the uniformity coefficient of common electrode.Preferably, the resistance of this counter electrode 108 is 10 ~ 700 times of the resistance of sweep trace 102.Or the RC value of this counter electrode 108 is 10 ~ 220 times of the RC value of sweep trace 102.
At a specific embodiment, counter electrode 108 is nano silver wire (silver nanowire) or Nano Silver metal grill (metal mesh).
In order to further illustrate the contribution of counter electrode for common electrode uniformity coefficient, composition graphs 2 (a), Fig. 2 (b), Fig. 3 (a) and Fig. 3 (b) are explained.Wherein, when Fig. 2 (a) and Fig. 2 (b) illustrates the dot structure adopting Fig. 1 respectively, pixel voltage and counter electrode voltage change schematic diagram along with thin film transistor (TFT) is opened with voltage waveform when turning off.When Fig. 3 (a) and Fig. 3 (b) illustrate the dot structure adopting Fig. 1 respectively, the pixel voltage being positioned at face plate edge region and the pixel voltage the being positioned at face plate center region schematic equivalent circuit based on the load effect of counter electrode thus when being coupled by sweep trace.
With reference to Fig. 2 (a) and Fig. 2 (b), because counter electrode 108 is parallel with sweep trace 102 and have overlap, its coupling influence being subject to sweep trace is large, and the voltage waveform on counter electrode 108 can change along with the open and close of sweep trace signal.In voltage change process, the moment of main change pixel voltage is when appearing at the closedown of sweep trace signal, at this moment the voltage waveform on counter electrode is because of the coupling effect of sweep trace, larger change in voltage can be produced, this change in voltage can through the counter electrode 108 side direction capacitive coupling with pixel electrode 100, and pixel voltage is drop-down thus pixel voltage is reduced.Dotted line in Fig. 2 (a) is pixel voltage waveform when not arranging counter electrode, solid line be provided with counter electrode after pixel voltage waveform, easily know, when sweep trace signal is closed, voltage on counter electrode can produce larger change in voltage, and this change in voltage also causes pixel voltage by drop-down and reduce.
With reference to Fig. 3 (a) and Fig. 3 (b), in order to reach the even results of common electric voltage at face plate edge region and panel zone line, except counter electrode will parallel with sweep trace except, we also must make the drop-down amount differentiation of the respective pixel voltage of counter electrode counter plate fringe region and zone line, that is, make the slippage of the pixel voltage in face plate edge region less, and make the slippage of the pixel voltage of panel zone line more.Therefore, counter electrode needs to configure special ohmic load, and make it can be maintained by DC signal U1 in face plate edge, the impact be coupled by sweep trace signal is less, and the slippage of pixel voltage is less; In the panel, region can closely suspend again, and ((floating) state, makes it be more easily coupled by sweep trace signal, increases the slippage of pixel voltage.From Fig. 3 (a), in face plate edge region, the voltage on counter electrode 108 is maintained because of DC signal U1, even sweep trace signal is closed, its coupling influence suffered is also less, and thus the slippage of pixel voltage is less; And in Fig. 3 (b), voltage on the counter electrode 108 of panel zone line is equivalent to suspension (floating) state substantially, when sweep trace signal gate closes, it is larger to the coupling influence of counter electrode 108, voltage now on counter electrode 108 is dragged down, affect the pixel voltage pixel of the pixel capacitance other end again through this counter electrode 108, make the slippage of pixel voltage more, and then reach the even of common electric voltage or balance.
Fig. 4 illustrates one second embodiment according to the dot structure for liquid crystal display of the present invention.
Compared by Fig. 4 and Fig. 1, its key distinction is, the first DC voltage U1 and the second DC voltage U2 is provided by same signal wire U, and the first DC voltage U1 equals the second DC voltage U2.
Fig. 5 illustrates one the 3rd embodiment according to the dot structure for liquid crystal display of the present invention.
Compared by Fig. 5 and Fig. 1, its key distinction is, counter electrode 108 is electrically coupled to a transparency conducting layer 112 (such as tin indium oxide material) via a via hole 110, and this transparency conducting layer 112 is positioned at same layer with pixel electrode 100.Because counter electrode 108 is connected to transparency conducting layer 112 via via hole 110, make between itself and pixel electrode 100, there is larger side direction electric capacity, the coupling effect of counter electrode and pixel electrode can be promoted.
Fig. 6 illustrates one the 4th embodiment according to the dot structure for liquid crystal display of the present invention.
Compared by Fig. 6 and Fig. 1, its key distinction is, counter electrode 108 is electrically coupled to an intermediate conductive layer 116 via a via hole 114, and this intermediate conductive layer 116 overlaps with pixel electrode 100, to increase the coupling effect of pixel voltage.
Fig. 7 illustrates one the 5th embodiment according to the dot structure for liquid crystal display of the present invention.
Fig. 7 and Fig. 1 is compared, its key distinction is the structure being counter electrode 108, it comprises discontinuous multiple compensation section, (namely each compensation section is positioned at the second metal level, same layer is positioned at data line 104), and couple mutually with electrically conducting transparent material via via hole between adjacent compensation section.Such as, compensation section 118 is electrically coupled to adjacent compensation section 120 via via hole P1, electrically conducting transparent material 122, via hole P2.
Adopt the dot structure for liquid crystal display of the present invention, its sweep trace is arranged at a first metal layer and extends in the horizontal direction, its data line is arranged at one second metal level and vertically extends, above-mentioned data line and above-mentioned sweep trace are crisscross arranged, common electrode is electrically coupled to one first DC voltage, and counter electrode is parallel with sweep trace and overlapping at least partly, this counter electrode is electrically coupled to one second DC voltage.Compared to prior art, dot structure of the present invention by counter electrode at the signal couple different of face plate edge and face plate center to improve the uniformity coefficient of common electrode.
Above, the specific embodiment of the present invention is described with reference to the accompanying drawings.But those skilled in the art can understand, when without departing from the spirit and scope of the present invention, various change and replacement can also be done to the specific embodiment of the present invention.These change and replace and all drop in claims of the present invention limited range.
Claims (10)
1. the dot structure for liquid crystal display, it is characterized in that, described dot structure comprises a first substrate, a second substrate and the liquid crystal layer between described first substrate and described second substrate, wherein, described second substrate and described first substrate are oppositely arranged, and have:
Multiple pixel electrode, is arranged in described second substrate in rectangular;
At least one sweep trace, is arranged at a first metal layer and extends in the horizontal direction;
At least one data line, is arranged at one second metal level and vertically extends, and described data line and described sweep trace are crisscross arranged;
At least one common electrode, is electrically coupled to one first DC voltage; And
One counter electrode, parallel with described sweep trace and overlapping at least partly, described counter electrode is electrically coupled to one second DC voltage,
Wherein, the sheet resistance value of described counter electrode between 0.25 ~ 15 Ω/, described dot structure by described counter electrode at the signal couple different of face plate edge and face plate center to improve the uniformity coefficient of described common electrode.
2. the dot structure for liquid crystal display according to claim 1, is characterized in that, the resistance of described counter electrode is 10 ~ 700 times of the resistance of described sweep trace.
3. the dot structure for liquid crystal display according to claim 1, is characterized in that, the RC value of described counter electrode is 10 ~ 220 times of the RC value of sweep trace.
4. the dot structure for liquid crystal display according to claim 1, is characterized in that, described counter electrode is nano silver wire or Nano Silver metal grill.
5. the dot structure for liquid crystal display according to claim 1, is characterized in that, described first DC voltage is provided by different signal wires respectively from described second DC voltage.
6. the dot structure for liquid crystal display according to claim 1, is characterized in that, described first DC voltage and described second DC voltage are provided by same signal wire, and described first DC voltage equals described second DC voltage.
7. the dot structure for liquid crystal display according to claim 1, is characterized in that, described counter electrode is electrically coupled to a transparency conducting layer via a via hole, and described transparency conducting layer and described pixel electrode are positioned at same layer.
8. the dot structure for liquid crystal display according to claim 1, is characterized in that, described counter electrode is electrically coupled to an intermediate conductive layer via a via hole, and described intermediate conductive layer and described pixel electrode overlap.
9. the dot structure for liquid crystal display according to claim 1, it is characterized in that, described counter electrode comprises discontinuous multiple compensation section, and described compensation section is positioned at described second metal level, and couples mutually with electrically conducting transparent material via via hole between adjacent compensation section.
10. the dot structure for liquid crystal display according to claim 1, is characterized in that, described pixel electrode is tin indium oxide material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510070709.3A CN104614901A (en) | 2015-02-11 | 2015-02-11 | Pixel structure for liquid crystal display |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510070709.3A CN104614901A (en) | 2015-02-11 | 2015-02-11 | Pixel structure for liquid crystal display |
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| CN104614901A true CN104614901A (en) | 2015-05-13 |
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| CN201510070709.3A Pending CN104614901A (en) | 2015-02-11 | 2015-02-11 | Pixel structure for liquid crystal display |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111047986A (en) * | 2019-11-27 | 2020-04-21 | 南京中电熊猫平板显示科技有限公司 | Display panel |
| CN112703448A (en) * | 2018-09-11 | 2021-04-23 | 株式会社日本显示器 | Display device and rearview mirror device |
-
2015
- 2015-02-11 CN CN201510070709.3A patent/CN104614901A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112703448A (en) * | 2018-09-11 | 2021-04-23 | 株式会社日本显示器 | Display device and rearview mirror device |
| CN111047986A (en) * | 2019-11-27 | 2020-04-21 | 南京中电熊猫平板显示科技有限公司 | Display panel |
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Application publication date: 20150513 |