CN101232014B - Organic illuminated display element and manufacturing method thereof - Google Patents
Organic illuminated display element and manufacturing method thereof Download PDFInfo
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- CN101232014B CN101232014B CN200710007326A CN200710007326A CN101232014B CN 101232014 B CN101232014 B CN 101232014B CN 200710007326 A CN200710007326 A CN 200710007326A CN 200710007326 A CN200710007326 A CN 200710007326A CN 101232014 B CN101232014 B CN 101232014B
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Abstract
The invention discloses an organic light emitting display device (OLED), which consists of a first substrate and a second substrate arranged corresponding to the first substrate. The first substrate comprises a plurality of transistors electrically connected with each other, and a first connection electrode electrically connected with one of the transistors. The second substrate includes a plurality of sub-pixels, each including an emitting region and a non-emitting region, wherein the non-emitting region includes a second connection electrode covered by a barrier rib on the periphery and protruding in a direction toward the first substrate, the top end height of the second connection electrode is not lower than the top end height of the barrier rib, and the first substrate is electrically connected with the second substrate through the first and the second connection electrodes. According to the organic light emitting display device and manufacturing method thereof, the invention enables the manufacture of displays with high yield, high aperture ratio, high reliability, etc.
Description
Technical field
The invention relates to a kind of organic illuminated display element and manufacturing approach thereof, and particularly relevant for a kind of organic illuminated display element and manufacturing approach thereof with high yield, high aperture and high-reliability.
Background technology
The structure and the manufacturing approach of tradition OLED (OLED) are in regular turn thin-film transistor (TFT) circuit and light-emitting component to be formed complete display element on single substrate; Afterwards, in a cover plate display element being sealed in again, in case extraneous aqueous vapor gets into and the deterioration light-emitting component.In manufacture process, because thin-film transistor processing procedure and light-emitting component processing procedure are successively accomplished on single substrate, the yield of substrate is the multiplied result of TFT process rate and light-emitting component process rate, far below individual other yield.Characteristics such as yield, aperture opening ratio and reliability in order to improve OLED have developed at present existing processing procedure have been cut apart, and accomplish the manufacturing of display with the technology that the double-basis plate engages.
Please with reference to Fig. 1, it illustrates a kind of generalized section of organic illuminated display element of traditional double substrates.As shown in Figure 1, double-basis plate joining technique mainly is that the organic illuminated display element tectonic province is divided into first substrate (claim not only TFT substrate), 10 and second substrate (but also claiming oled substrate) 20.On first substrate 10, form most switching transistor (not shown)s, driving transistors 12 and electrical connecting units 14.Wherein, electrical connecting unit 14 provides second substrate 20 picture element signals in order to connection.Then form light-emitting component on second substrate 20, comprise first electrode 21, luminescent layer (for example can send the luminescent layer of ruddiness, green glow and blue light respectively) 22, insulating barrier 23, barrier rib 24 and second electrode 25.Wherein, insulating barrier 23 is to block each photochromic luminescent layer and affiliated first, second electrode; 24 of barrier ribs are in order to separate second electrode 25.
After first substrate 10 and 20 pairs of groups of second substrate, then form an OLED.Wherein, the electrical connecting unit 14 on first substrate 10 is to be connected with the drain electrode of driving transistors 12.Therefore, after the two substrates combination, electrical connecting unit 14 can make the pixel electrode electric connection of drain electrode and second substrate 20 of the driving transistors 12 of first substrate 10, so that the required signal of light-emitting component on second substrate 20 to be provided.
Because during the combination of double-basis plate, electrical connecting unit 14 is directly to contact with the light-emitting component of second substrate, 20 luminous zones one by one, has high probability can damage light-emitting component, cause yield to reduce.
Summary of the invention
The present invention is a kind of organic illuminated display element and the manufacturing approach thereof with high yield, high aperture and high-reliability that provides for the above-mentioned shortcoming that overcomes the prior art existence.
According to the object of the invention, a kind of organic illuminated display element (OLED) is proposed, be by one first substrate with one second substrate of the corresponding setting of first substrate group is formed.First substrate comprises most transistors of mutual electric connection and one first connection electrode that electrically connects with one of these transistors.Second substrate has most time pixels (sub-pixel); Pixel has a luminous zone and a non-light-emitting area each time; Wherein, non-light-emitting area comprises one second connection electrode, the second connection electrode around, one barrier rib; And second connection electrode is that the top of second connection electrode is not less than the height on barrier rib top towards the direction projection of first substrate.Wherein, first substrate and second substrate are to electrically connect via second connection electrode and first connection electrode.
According to the object of the invention, the manufacturing approach of a kind of organic illuminated display element (OLED) is proposed, may further comprise the steps:
One first substrate is provided, and on first substrate, forms most the transistors that electrically connect each other;
Form one first connection electrode on first substrate, and first connection electrode and those transistorized electric connections;
One second substrate is provided, and second substrate has a majority time pixel, and pixel has a luminous zone and a non-light-emitting area each time, and in non-light-emitting area, forms one second connection electrode, and the direction projection of second connection electrode and court's first substrate; And
To organizing first substrate and second substrate, first connection electrode and second connection electrode are electrically connected.
Use organic illuminated display element of the present invention and manufacturing approach thereof, can produce the display of characteristics such as having high yield, high aperture and high-reliability.
Description of drawings
For letting above-mentioned purpose of the present invention, characteristic and the advantage can be more obviously understandable, below specially lift a preferred embodiment, and cooperate appended graphicly, elaborate.Wherein:
Fig. 1 illustrates a kind of generalized section of organic illuminated display element of traditional double substrates.
Fig. 2 illustrates the vertical view according to the organic illuminated display element of the present invention's one preferred embodiment.
Fig. 3 illustrates the generalized section according to the organic illuminated display element of the hatching A-A ' of Fig. 2.
Fig. 4 A, Fig. 4 B illustrate the sketch map according to two kinds of the present invention's one preferred embodiment first multi-form connection electrode respectively.
Fig. 5 is the flow chart according to organic illuminated display element (OLED) manufacturing approach of the present invention's one preferred embodiment.
The main element symbol description is following among the figure:
3: the luminous zone
4: non-light-emitting area
10,50: the first substrates
12,52: driving transistors
14: electrical connecting unit
20,60: the second substrates
21,61: the first electrodes
22,62: luminescent layer
23,63: insulating barrier
24,64: barrier rib
25,65: the second electrodes
54: the first connection electrode
541a, 541b: contact electrode
543: the reinforcement electrode
545: reinforcing body
67: the second connection electrode
671: bottom electrode
672: connector
673: organic layer
674: top electrode
Embodiment
The present invention proposes a kind of organic illuminated display element and manufacturing approach thereof; Make electrical connecting unit after first, second substrate is to group; Can avoid because of second electrode 25 of direct contact like luminous zone on second substrate 20 of Fig. 1, and then the luminescent layer 22 that destroys second electrode 25 and cover.Wherein, First, second substrate is claimed TFT substrate, oled substrate respectively again; And the thin-film transistor of TFT substrate (Thin Film Transistor) can be PMOS (P-Type Metal OxideSemiconductor), NMOS (N-Type Metal Oxide Semiconductor) or CMOS (Complementary Metal Oxide Semiconductor), can adopt technology such as amorphous silicon (Amorphous silicon) or low temperature polycrystalline silicon (LTPS) on the processing procedure.
Below with a preferred embodiment as detailed description of the present invention, yet, the scope of this embodiment desire protection can't limit of the present invention.In addition, omitted unnecessary element in the diagram, with clear demonstration technical characterstic of the present invention.
It is the vertical view according to the organic illuminated display element of the present invention's one preferred embodiment that Fig. 2 illustrates.It is the generalized section according to the organic illuminated display element of the hatching A-A ' of Fig. 2 that Fig. 3 illustrates.Please be simultaneously with reference to Fig. 2 and Fig. 3.Organic illuminated display element (OLED) is to be formed by one first substrate 50 and 60 pairs of groups of one second substrate, and display element has most time pixels (sub-pixel), and pixel has a luminous zone 3 and a non-light-emitting area 4 each time.As shown in Figure 2,4 times pixel has emitting red light district (R from left to right respectively
1), green emitting district (G
1), blue-light-emitting district (B
1) and emitting red light district (R
2).And each time in the pixel, the nearly Outboard Sections of circle is the vertical view of barrier rib 64, and circle center partly is the vertical view of the connector 672 of second connection electrode 67, and the zone at its place is all non-light-emitting area 4.
On first substrate 50 most individual transistor and one first connection electrode 54 with mutual electric connection.Wherein, transistor comprises that switching transistor (not shown) and driving transistors 52, the first connection electrode 54 then transistorized one electrically connect with those.First connection electrode 54 can be the structure of metal, metal alloy, metal oxide, metal-to-metal adhesive or coating conductive metal layer or compound conductive material layer.Please with reference to Fig. 4 A, Fig. 4 B, it illustrates the sketch map according to two kinds of the present invention's one preferred embodiment first multi-form connection electrode respectively.When practical application; First connection electrode 54 can be contact electrode (contact electrode) 541a, the 541b that electrically connects with drain electrode or source electrode; Be to illustrate first connection electrode 54 to be contact electrode 541a in Fig. 4 A, this contact electrode is the approach of general transistor drain or source electrode and extraneous conducted signal.In addition; First connection electrode 54 also can comprise a reinforcement electrode 543; And reinforcement electrode 543 electrically connects with contact electrode 541a, shown in Fig. 4 B, wherein; Reinforcement electrode 543 more can comprise a reinforcing body 545, reinforcing body 545 for example be structure or the compound conductive material layer of metal, metal alloy, metal oxide, metal-to-metal adhesive or coating conductive metal layer or by non-conductor for example silica (SiOx), silicon nitride (SiNx) or macromolecular material (polymer) constitute.In this preferred embodiment, first connection electrode 54 for example is the source electrode of driving transistors 52 or the contact electrode of drain electrode (like the contact electrode 541a of Fig. 4 A), can save the light shield processing procedure.
As shown in Figure 3; Second substrate 60 is the luminous zone 3 of pixel each time; Be have first electrode 61 (for example transparent electric conducting material is metal, metal alloy, metal oxide etc. for example), luminescent layer (for example can send the luminescent layer of ruddiness, green glow and blue light respectively; Luminescent layer comprises the organic layer of light-emitting component, can be selected from electric hole implanted layer (HIL), electric hole conducting shell (HTL), luminous material layer (EL), electronic conductive layer (ETL), electron injecting layer (EIL) and carrier barrier layer (carrierblocking layer)) 62, insulating barrier 63, barrier rib 64 and second electrode 65.Second electrode 65 for example is aluminium (Al), calcium (Ca), magnesium (Mg) or double-deck lithium fluoride/aluminium electric conducting materials such as (LiF/Al).Wherein, insulating barrier 63 is to block each photochromic luminescent layer 62 and the first affiliated electrode 61, with electrically isolated these times pixel.
It should be noted that non-light-emitting area 4 places of second substrate 60, is to have one second connection electrode 67, and second connection electrode 67 is outstanding towards the direction of first substrate 50, and its top is not less than the height on barrier rib 64 tops.In this preferred embodiment, second connection electrode 67 is to coat a connector 672 with a conductive composite layer to form.
As shown in Figure 3, second connection electrode 67 of non-light-emitting area 4 preferably comprises a bottom electrode 671, a connector 672, an organic layer 673 and a top electrode 674.Wherein, bottom electrode 671 is positioned on second substrate 60, and electrically connects with first electrode 61 of luminous zone 3; Connector 672 is positioned on the bottom electrode 671; Organic layer 673 is formed on the connector 672; 674 of top electrodes are positioned on the connector 672, cover organic layer 673 and connector 672, and in connector 672 peripheral and bottom electrode 671 electric connections.Wherein, connector 672 is a patterned conductor or a non-conductor.
After first substrate 50 and 60 pairs of groups of second substrate; Second connection electrode 67 outstanding towards first substrate, 50 directions can electrically connect with first connection electrode 54; The driving transistors 52 of first substrate 50 and the pixel electrode of second substrate 60 are electrically connected; Conduct to first electrode 61 on second substrate 60 so that drive signal is seen through second connection electrode 67, and the required signal of light-emitting component on second substrate 60 is provided.
Moreover in this preferred embodiment, barrier rib 64 is to be formed on the insulating barrier 63 also second connection electrode 67 to be surrounded closedly, with second electrode 65 of separation luminous zone 3 and second connection electrode 67 of non-light-emitting area 4.And the insulating barrier 63 between the barrier rib 64 and second substrate 60 then can increase the adhesive force of barrier rib 64.Certainly, barrier rib 64 also is formed directly on second substrate 60, and the present invention is to this not special restriction.
When actual fabrication, the bottom electrode 671 of the non-light-emitting area 4 on second substrate 60 can be processed by same material with first electrode 61 of luminous zone 3.Same, the organic layer 673 of non-light-emitting area 4 can have same structure with the luminescent layer 62 of luminous zone 3 and processed by same material; The top electrode 674 and second electrode 65 can be processed by same material.
Fig. 5 is the flow chart according to organic illuminated display element (OLED) manufacturing approach of the present invention's one preferred embodiment.Please be simultaneously with reference to Fig. 2 and Fig. 3.At first, one first substrate 50 is provided, and on first substrate, forms most the transistors (comprising driving transistors 52) that electrically connect each other, shown in step 501.Then, form one first connection electrode 54 on first substrate 50, and first connection electrode 54 and the electric connection of one of these transistors, shown in step 502.One second substrate 60 is provided; Second substrate 60 has most time pixels, and pixel has a luminous zone 3 and a non-light-emitting area 4 each time, and in non-light-emitting area 4, forms one second connection electrode 67; And the direction projection of second connection electrode 67 and court's first substrate 50 is shown in step 503.Then, to organizing first substrate 50 and second substrate 60, first connection electrode 54 and second connection electrode 67 are electrically connected, shown in step 504.
Wherein, When making the element on second substrate 60; Connector 672 is the direction projections towards first substrate 50; And the bottom electrode 671 of non-light-emitting area 4 can form with first electrode 61 of luminous zone 3 simultaneously, and the organic layer 673 of non-light-emitting area 4 can form with the luminescent layer 62 of luminous zone 3 simultaneously, and the top electrode 674 and second electrode 65 can form simultaneously.
If second connection electrode 67 does not comprise organic layer 673; Must shelter from this tie point zone on the metal cap curtain that then the organic luminous layer vapor deposition is used; Because of considering aligning accuracy and metal cap screen making precision on the vapor deposition processing procedure, in the design of organic luminous layer 62 metal cap curtains, need shelter from the scope bigger than the tie point zone, so can reduce original luminous zone; Reduce aperture opening ratio; But, if the top electrode 674 of second connection electrode 67 of non-light-emitting area 4 can more intactly be electrically connected with bottom electrode 671, then can be according to those luminescent layers of aforesaid way vapor deposition.
In addition, if make the present invention possess high aperture, then use the processing procedure of preferred embodiment of the present invention; The zone of in the design of the metal cap curtain of vapor deposition luminescent layer 62, can not need cover second connection electrode 67; Under the situation that need not reduce in the luminous zone, make top electrode 674 and bottom electrode 671, the drive signal of first substrate 50 is conducted on the pixel of second substrate 60 in connector 672 peripheral electric connections; Its method can be reached by following several method, comprising:
(1) preferably utilizes difference on top electrode 674 and organic layer 673 vapor deposition molecular sizes and the kinetic energy; The area that top electrode 674 can be covered in the zone of second connection electrode 67 is bigger than organic layer 673; The edge of the top electrode 674 of vapor deposition can be directly and bottom electrode 671 edges electrically connect near the zone of barrier rib 64 bottoms, the zone can conduct current to bottom electrode 671 by top electrode 674 thus;
During (2) with vapor deposition and the second electrode deposition material source of second substrate, 60 close together; Organic layer 673 vapor deposition source that collocation is far away with second substrate 60; Can dwindle the interior organic layer 673 vapor deposition areas in zone of second connection electrode 67, electrically connect in order to top electrode 674 and bottom electrode 671;
(3) utilization separates sloped sidewall and the surface of insulating layer or the folded angle of horizontal plane (with the second level of base plate face) of the barrier rib 64 of second electrode 65; More little top electrode 674 and the bottom electrode 671 of making more easily of its angle electrically connects; Aforementioned angle is preferable less than 70 °; Be more preferred between 40 ° to 60 °, the best is between 55 ° to 60 °.
Moreover two substrates is to when group, and first connection electrode 54 is to contact at non-light-emitting area 4 with second connection electrode 67, therefore, can not destroy the light-emitting component of luminous zone 3.In addition; With the contact electrode of the source electrode of the driving transistors 52 on first substrate 50 or drain electrode as first connection electrode 54, except can saving the light shield processing procedure, if the area of first connection electrode 54 strengthens slightly; Cooperate the design of last second connection electrode 67 (outstanding towards first substrate, 50 directions; And it highly is not less than the height of barrier rib 64 on every side), two substrates precision requirement when contraposition is reduced, improve and produce yield.
According to above-mentioned, use organic illuminated display element of the present invention and manufacturing approach thereof, can produce the display of characteristics such as having high yield, high aperture and high-reliability.
In sum, though the present invention discloses as above with a preferred embodiment, so it is not in order to limit the present invention.Those skilled in the art under the present invention are not breaking away from the spirit and scope of the present invention, can do various changes and retouching.Therefore, protection scope of the present invention is when looking being as the criterion that claims define.
Claims (10)
1. an organic illuminated display element is characterized in that, comprising:
One first substrate, this first substrate comprise most transistors of mutual electric connection; And
One first connection electrode electrically connects with one of said transistor;
One second substrate, with the corresponding setting of said first substrate, this second substrate has most time pixels, and pixel has each time:
One luminous zone and a non-light-emitting area, said non-light-emitting area comprise one second connection electrode, this second connection electrode around, one barrier rib, and the top of this second connection electrode is not less than the height on this barrier rib top;
Wherein, said luminous zone comprises:
One first electrode is positioned on said second substrate;
One luminescent layer is positioned on said first electrode; And
One second electrode is positioned on the said luminescent layer;
Wherein, said second connection electrode of said non-light-emitting area comprises:
One bottom electrode is positioned on said second substrate, and electrically connects with said first electrode of said luminous zone;
One connector is positioned on this bottom electrode; With
One top electrode is positioned on this connector and this connector of complete covering, and electrically connects with this bottom electrode in this connector is peripheral;
Said second connection electrode also comprises: an organic layer is arranged between this connector and the top electrode;
Wherein, Said first substrate and said second substrate; Electrically connect via this second connection electrode and said first connection electrode; The area coverage more said organic layer of said top electrode in the zone of second connection electrode is bigger, and the edge of said top electrode directly electrically connects with the zone of said bottom electrode edge near the barrier rib bottom.
2. display element as claimed in claim 1; It is characterized in that; Said transistor on said first substrate comprises most switching transistors and plurality of drive transistor, the source electrode that said first connection electrode is one of said driving transistors or a contact electrode of drain electrode.
3. display element as claimed in claim 2 is characterized in that, said first connection electrode also comprises a reinforcement electrode, is electrically connected on the said contact electrode of source electrode or drain electrode of one of said driving transistors.
4. display element as claimed in claim 1 is characterized in that, the said bottom electrode of non-light-emitting area and said first electrode of said luminous zone are same material in the said second substrate time pixel.
5. display element as claimed in claim 1 is characterized in that, the said top electrode of non-light-emitting area and said second electrode of said luminous zone are same material in the said second substrate time pixel.
6. like claim 1 a described display element, it is characterized in that the said organic layer of luminescent layer and said non-light-emitting area is to be same material described in the luminous zone of said second substrate time pixel.
7. an organic illuminated display element is characterized in that, comprising:
One first substrate, this first substrate comprises: the most individual switching transistor and the driving transistors that electrically connect each other; And
One first connection electrode electrically connects with one of said driving transistors;
One second substrate, with the corresponding setting of said first substrate, this second substrate has most time pixels, and pixel has each time:
One luminous zone and a non-light-emitting area, said non-light-emitting area comprise one second connection electrode, this second connection electrode around, one barrier rib, and this second connection electrode is that a conductive composite layer coats a connector;
Wherein, said luminous zone comprises:
One first electrode is positioned on said second substrate;
One luminescent layer is positioned on said first electrode; And
One second electrode is positioned on the said luminescent layer;
Wherein, said second connection electrode of said non-light-emitting area comprises:
One bottom electrode is positioned on said second substrate, and electrically connects with said first electrode of said luminous zone;
One connector is positioned on this bottom electrode; With
One top electrode is positioned on this connector and this connector of complete covering, and electrically connects with this bottom electrode in this connector is peripheral;
Said second connection electrode also comprises: an organic layer is arranged between this connector and the top electrode;
Wherein, said first substrate and said second substrate are to electrically connect via this second connection electrode and said first connection electrode;
The area coverage more said organic layer of said top electrode in the zone of second connection electrode is bigger, and the edge of said top electrode directly electrically connects with the zone of said bottom electrode edge near the barrier rib bottom.
8. the manufacturing approach of an organic illuminated display element is characterized in that, may further comprise the steps:
One first substrate is provided, and on this first substrate, forms most the transistors that electrically connect each other;
Form one first connection electrode on this first substrate, and one of this first connection electrode and said transistor electrically connect;
One second substrate is provided, and this second substrate has most time pixels, and pixel has a luminous zone and a non-light-emitting area each time, and in said non-light-emitting area, forms one second connection electrode, and this second connection electrode and towards the direction projection of this first substrate; And
To organizing this first substrate and this second substrate, said first connection electrode and this second connection electrode are electrically connected;
Wherein, said luminous zone comprises:
One first electrode is positioned on said second substrate;
One luminescent layer is positioned on said first electrode; And
One second electrode is positioned on the said luminescent layer;
Wherein, said second connection electrode of said non-light-emitting area comprises:
One bottom electrode is positioned on said second substrate, and electrically connects with said first electrode of said luminous zone;
One connector is positioned on this bottom electrode; With
One top electrode is positioned on this connector and this connector of complete covering, and electrically connects with this bottom electrode in this connector is peripheral;
Said second connection electrode also comprises: an organic layer is arranged between this connector and the top electrode;
The area coverage more said organic layer of said top electrode in the zone of second connection electrode is bigger, and the edge of said top electrode directly electrically connects with the zone of said bottom electrode edge near the barrier rib bottom.
9. manufacturing approach as claimed in claim 8 is characterized in that, in the said luminous zone of said second substrate, is formed with:
One first electrode is formed on said second substrate;
One luminescent layer is formed on this first electrode; With
One second electrode is formed on the said luminescent layer.
10. manufacturing approach as claimed in claim 9 is characterized in that, the step that forms said second connection electrode comprises:
Form a bottom electrode on said second substrate, and said first electrode of this bottom electrode and said luminous zone electrically connects;
Form a connector on this bottom electrode, and this connector is the direction projection towards said first substrate; With
Form a top electrode to cover this connector and to electrically connect with said bottom electrode.
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| CN200710007326A CN101232014B (en) | 2007-01-25 | 2007-01-25 | Organic illuminated display element and manufacturing method thereof |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638554A (en) * | 2003-12-30 | 2005-07-13 | Lg.菲利浦Lcd株式会社 | Organic electroluminescent device and method of fabricating the same |
| CN1761371A (en) * | 2004-10-12 | 2006-04-19 | Lg.菲利浦Lcd株式会社 | Organic electro luminescence device and fabrication method thereof |
| CN1983622A (en) * | 2005-12-14 | 2007-06-20 | Lg.菲利浦Lcd株式会社 | Organic electro-luminescence display device and method for fabricating of the same |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1638554A (en) * | 2003-12-30 | 2005-07-13 | Lg.菲利浦Lcd株式会社 | Organic electroluminescent device and method of fabricating the same |
| CN1761371A (en) * | 2004-10-12 | 2006-04-19 | Lg.菲利浦Lcd株式会社 | Organic electro luminescence device and fabrication method thereof |
| CN1983622A (en) * | 2005-12-14 | 2007-06-20 | Lg.菲利浦Lcd株式会社 | Organic electro-luminescence display device and method for fabricating of the same |
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Effective date of registration: 20120917 Address after: Taiwan, China Hsinchu science and Technology Industrial Park, Miaoli County, Southern Town, science Road, No. 160 Patentee after: Chimei Optoelectronics Co., Ltd. Patentee after: Qijing Photoelectric Co., Ltd. Address before: China Taiwan Tainan County Tainan Science Industrial Park odd Road No. 1 Patentee before: Chimei Optoelectronics Co., Ltd. Patentee before: Qijing Photoelectric Co., Ltd. |