CN109509404B - Flexible organic light emitting display device - Google Patents
Flexible organic light emitting display device Download PDFInfo
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- CN109509404B CN109509404B CN201910053857.2A CN201910053857A CN109509404B CN 109509404 B CN109509404 B CN 109509404B CN 201910053857 A CN201910053857 A CN 201910053857A CN 109509404 B CN109509404 B CN 109509404B
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- emitting display
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/301—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements flexible foldable or roll-able electronic displays, e.g. thin LCD, OLED
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
Abstract
The embodiment of the invention provides a flexible organic light-emitting display device, relates to the technical field of display, and is used for improving the display effect to enable the display effect in a bending state to be the same as that in a flattening state. The flexible organic light emitting display device includes: the display panel comprises at least two flexible organic light-emitting display panels which are arranged in an overlapped mode, wherein the light emitting directions of the at least two flexible organic light-emitting display panels are the same; the polaroids are arranged on the light emitting sides of the at least two flexible organic light-emitting display panels in a laminated mode; the optical adhesive is arranged between the polarizer and the at least two flexible organic light-emitting display panels and used for attaching the at least two flexible organic light-emitting display panels to the polarizer; the optical adhesive covers at least two of the flexible organic light-emitting display panels, and one surface, close to the light-emitting side, of the optical adhesive is kept in a flat state. The flexible organic light emitting display device is suitable for displaying.
Description
Technical Field
The invention relates to the technical field of display, in particular to a flexible organic light-emitting display device.
Background
In recent years, with the continuous development of display technologies, various display devices, such as liquid crystal display devices, organic light emitting display devices, etc., have become mainstream products of display industries at present, wherein a flexible organic light emitting display panel becomes a mainstream trend of the development of the display industries due to a series of excellent performances, such as lightness, thinness, low power consumption, high brightness, high contrast, high resolution, wide viewing angle, foldability, etc., and is a hot spot of the research in the current display field.
In the prior art, a splicing technology is mostly adopted for a large-size flexible organic light-emitting display panel screen, that is, two flexible organic light-emitting display panels are overlapped, an overlapping area of the two flexible organic light-emitting display panels is bonded by using an adhesive, then a polaroid is covered on a light-emitting side, and the polaroid and the edge of the flexible organic light-emitting display panel are sealed by using an adhesive, so that the flexible device can be bent or curled.
After the packaging is carried out by the glue sealing mode, a gap is formed between one of the two overlapped flexible organic light-emitting display panels far away from the light-emitting side and the polaroid, and when the two overlapped flexible organic light-emitting display panels are in a flattened state, normal display can be carried out; however, after the two flexible organic light emitting display panels are bent or curled, the polarizer may contact the screen, and the refractive index of light is different from that in the flat state, thereby affecting the display effect.
Therefore, how to make the display effect after bending the same as the display effect in the flat state is a main problem to be solved urgently in the field.
Disclosure of Invention
In view of the above, embodiments of the present invention provide a flexible organic light emitting display device for improving a display effect such that the display effect in a bent state is the same as that in a flattened state.
The present invention provides a flexible organic light emitting display device including:
the display panel comprises at least two flexible organic light-emitting display panels which are arranged in an overlapped mode, wherein the light emitting directions of the at least two flexible organic light-emitting display panels are the same;
the polaroids are arranged on the light emitting sides of the at least two flexible organic light-emitting display panels in a laminated mode;
the optical adhesive is arranged between the polarizer and the at least two flexible organic light-emitting display panels and used for attaching the at least two flexible organic light-emitting display panels to the polarizer;
the optical cement covers at least two of the flexible organic light-emitting display panels, and one surface of the optical cement, which is close to the light-emitting side, is kept in a flat state.
Optionally, the thickness of the optical adhesive contacting the flexible organic light-emitting display panel arranged above along the light emergent direction is h1, and h1 is greater than or equal to 0.05mm and less than or equal to 0.15mm; the thickness of the optical adhesive contacting with the flexible organic light-emitting display panel arranged below is h2, and h2 is more than or equal to 0.25mm and less than or equal to 0.35mm.
Optionally, the light transmittance T of the optical cement is more than or equal to 98%.
Optionally, the flexible organic light emitting display device further includes:
and the shading adhesive tape is used for bonding the surfaces, far away from the light emitting side, of the at least two flexible organic light emitting display panels which are arranged in an overlapped mode.
Optionally, the light-shielding adhesive tape is used for bonding the junction of the at least two overlapped flexible organic light-emitting display panels far away from the light-emitting side.
Optionally, the width of the light-shielding adhesive tape is K in the direction perpendicular to the light emergent direction, and K is greater than or equal to 0.8cm and less than or equal to 1.5cm.
Optionally, the light-shielding tape is an antistatic tape.
Optionally, the flexible organic light emitting display device further includes:
the adhesive is arranged along the light emitting direction, a first overlapping area is arranged on one side, deviating from the light emitting direction, of the flexible organic light emitting display panel arranged on the adhesive, a second overlapping area is arranged on one side, close to the light emitting direction, of the flexible organic light emitting display panel arranged below the adhesive, and the first overlapping area is adhered to the second overlapping area through the adhesive.
Optionally, the adhesive is the optical glue.
Optionally, in a curled state, a curling radius of at least two overlapped flexible organic light emitting display panels is R, and R is greater than or equal to 5mm.
The beneficial effects of the aspects and any possible implementation described above are as follows:
on the one hand, because the one side level that the optical cement is close to the light-emitting side for there is not the space between polaroid and the optical cement, the refracting index of emergent light has not had the interference of air bed, has improved flexible organic display device and has buckled or the display effect under the state of curling, thereby flexible organic display device is buckling or the display effect under the state of curling is close to the display effect under the flat state, has improved flexible organic light-emitting display device's display quality. On the other hand, the whole optical cement is covered on the flexible organic light-emitting display panel, so that the adhesion between the polarizer and the flexible organic light-emitting display panel is firmer.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a flexible organic light emitting display device according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view at the AA' position of FIG. 1 according to an embodiment of the present invention;
FIG. 3 is another cross-sectional view at the AA' position of FIG. 1 in accordance with an embodiment of the present invention;
FIG. 4 is another cross-sectional view at the AA' position of FIG. 1 in accordance with an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a flexible organic light emitting display device according to an embodiment of the present invention;
FIG. 6 is a cross-sectional view at the position BB' in FIG. 5 according to an embodiment of the present invention;
FIG. 7 is another cross-sectional view at position BB' of FIG. 5, in accordance with an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a flexible organic light emitting display device according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of another flexible organic light emitting display device according to an embodiment of the present disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe overlapping regions in embodiments of the present invention, these overlapping regions should not be limited by these terms. These terms are only used to distinguish the overlapping regions from each other. For example, the first overlap region may also be referred to as the second overlap region, and similarly, the second overlap region may also be referred to as the first overlap region without departing from the scope of embodiments of the present invention.
It should be noted that the terms "upper", "lower", "left", "right", and the like used in the description of the embodiments of the present invention are used in the angle shown in the drawings, and should not be construed as limiting the embodiments of the present invention. In addition, in this context, it is also to be understood that when an element is referred to as being "on" or "under" another element, it can be directly formed on "or" under "the other element or be indirectly formed on" or "under" the other element through an intermediate element.
Before the present solution is described in detail, the technical context of the present invention is briefly described:
when the inventors bond the polarizer and the display panel, there are several test methods as follows:
one method is to facilitate the solid glue to be adhered in a square shape, namely, glue is coated along the periphery of the display panel to adhere the panel and the polaroid. However, in the flexible display screen, after the display panel is bent, the stress on the bonding portion is uneven, and a gap occurs, thereby affecting the display effect.
The other is that the transparent optical adhesive is used for bonding in a square shape, the optical adhesive is liquid when in use, is convenient to coat, and has a large coverage area, so that the firmness is improved, but because a fall exists between two overlapped screens, the vertical distances between the two screens and a polaroid are different, air exists between the screens and the polaroid, and because the paths of emitted light of the screens are changed in a bent state, the display effect is different from that in a flat state; or, when the screen is in a curled state, the emitted light needs to pass through the air and the flexible substrate before being emitted, and at this time, the emitted light is refracted at the interface between the air and the flexible substrate, so that the display effect is different from that in a flat state.
In order to solve the above problems, the inventor designs the following technical solutions:
this embodiment provides a flexible organic light emitting display device, as shown in fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a flexible organic light emitting display device provided in an embodiment of the present invention, and fig. 2 is a cross-sectional view at an AA' position in fig. 1 provided in an embodiment of the present invention, where the flexible organic light emitting display device 500 includes: at least two flexible organic light emitting display panels 10 are overlapped, and the light emitting directions of the at least two flexible organic light emitting display panels 10 are the same. Wherein, the area of the dotted line is the overlapping area of the two. In order to meet the requirement of large size, two flexible organic light emitting display panels may be spliced together. Therefore, the requirement of large size can be met, and the display quality can be ensured.
As shown in fig. 2, along the arrow direction, the flexible organic light emitting display panel disposed above may be 101, and the flexible organic light emitting display panel disposed below may be 102. In this embodiment, the two flexible organic light emitting display panels may be a top emission structure flexible organic light emitting display panel, and may also be a bottom emission structure flexible organic light emitting display panel.
With continued reference to fig. 2, the flexible organic light emitting display device 500 further includes: the polarizers 11 disposed at the light emitting sides of the at least two flexible organic light emitting display panels 10 are stacked.
The flexible organic light emitting display device 500 further includes: and the optical adhesive 12 is arranged between the polarizer 11 and the at least two flexible organic light-emitting display panels 10, and the optical adhesive 12 is used for attaching the at least two flexible organic light-emitting display panels 10 to the polarizer 11. The optical adhesive 12 covers at least two flexible organic light emitting display panels 10, and one surface of the optical adhesive 12 close to the light emitting side is kept in a flat state.
The optical adhesive in this embodiment may be liquid optical adhesive (LOCA), and when in a liquid state, the optical adhesive is coated on two flexible organic light emitting display panels that are overlapped, and after the optical adhesive is cured, the flexible organic light emitting display panels and the polarizer may be attached together. On the one hand, because the optical cement is close to the one side level of light-emitting side for there is not the space between polaroid and the optical cement, the refracting index of emergent light has not had the interference of air bed, has improved flexible organic light emitting display device display effect under crooked or curling state, thereby flexible organic light emitting display device display effect under crooked or curling state is close the display effect under the flattening state, has improved flexible organic light emitting display device's display quality. On the other hand, the whole optical cement is covered on the flexible organic light-emitting display panel, so that the adhesion between the polarizer and the flexible organic light-emitting display panel is firmer.
In one embodiment, with continued reference to FIG. 2, the thickness of the optical adhesive in contact with the flexible OLED panel disposed above along the light emitting direction (as indicated by the arrow in FIG. 2) is h1,0.05mm ≦ h1 ≦ 0.15mm; the thickness of the optical adhesive contacting with the flexible organic light-emitting display panel arranged below is h2, and h2 is more than or equal to 0.25mm and less than or equal to 0.35mm.
The coating amount of the optical cement is small, the transmittance of light is high, but the firmness between the polarizer 11 and the flexible organic light-emitting display panel 10 cannot be guaranteed, so that the maximum thickness of the optical cement in the embodiment is 0.35mm, the firmness between the polarizer and the flexible organic light-emitting display panel is guaranteed on the one hand, and the sufficient transmittance of the emitted light is guaranteed on the other hand. Because the horizontal plane of two flexible organic light emitting display panel is inequality, in order to guarantee that the optical cement has smooth horizontal plane, thickness h2 with the optical cement of the flexible organic light emitting display panel contact that sets up under is certainly greater than with the thickness h1 of the optical cement of the flexible organic light emitting display panel contact that sets up at last, just so on the one hand can make polaroid and two flexible organic light emitting display panel all through the optical cement bond, on the other hand do not have the air bed between polaroid and the flexible organic light emitting display panel, the interference of air bed has been avoided to the light that jets out, make flexible organic light emitting display device at the level state with the display effect under the crimp state the same.
In one embodiment, the optical cement has a light transmittance T of 98% or more. The optical cement with high light transmittance can effectively increase the light emission amount and improve the light emission rate.
As shown in fig. 3, which is another cross-sectional view at the AA' position in fig. 1 according to an embodiment of the present invention, in this embodiment, the flexible organic light emitting display device 500 further includes:
and the light shielding adhesive tape 13 is used for bonding the surfaces, far away from the light emitting side, of the at least two overlapped flexible organic light emitting display panels 10. In fig. 3, a surface of the flexible organic light emitting display panel 101 disposed above and facing away from the arrow direction and a surface of the flexible organic light emitting display panel 102 disposed below and facing away from the arrow direction are bonded together. Such a design makes the two flexible organic light emitting display panels more robust.
Further, in a specific embodiment, as shown in fig. 4, which is another cross-sectional view at the AA' position in fig. 1 provided in the embodiment of the present invention, the light-shielding tape 13 is used to bond the boundary of at least two flexible organic light emitting display panels 10 that are overlapped and disposed away from the light-emitting side. In the embodiment, the junction of the two flexible organic light emitting display panels is bonded, so that on one hand, the firmness of the two flexible organic light emitting display panels which are arranged in an overlapped mode can be improved; on the other hand, the optical cement can be prevented from overflowing.
Still further, in another specific embodiment, with continuing reference to FIG. 4, the width of the light-shielding tape is K, where K is greater than or equal to 0.8cm and less than or equal to 1.5cm, in the direction perpendicular to the light-emitting direction. Along the light emitting direction (as shown by the arrow in fig. 4), if the width of the light-shielding tape is small, the two flexible organic light-emitting display panels which are arranged in an overlapped manner cannot be adhered; if the width of the shading adhesive tape is too long, the shading adhesive tape is wasted, and therefore, after the firmness and the practicability are considered, the width of the shading adhesive tape is set to be between 0.8cm and less than or equal to K and less than or equal to 1.5cm.
Alternatively, the light shielding tape 13 in this embodiment may be an antistatic tape. The antistatic adhesive tape can avoid the influence of static electricity on the screen.
It should be noted that, because the light-shielding tape itself is relatively small and is disposed at the junction of the two flexible organic light-emitting display panels that are overlapped, the organic light-emitting device is not shielded, and normal display is not affected.
In one embodiment, as shown in fig. 5 and fig. 6, fig. 5 is a schematic structural diagram of a flexible organic light emitting display device provided in an embodiment of the present invention, fig. 6 is a cross-sectional view of a position BB' in fig. 5 provided in an embodiment of the present invention, and the flexible organic light emitting display device 500 further includes:
and the adhesive 14 is arranged along the light outgoing direction (arrow direction in fig. 5), a first overlapping area 1011 is arranged on one side of the flexible organic light emitting display panel 101 arranged above, which is away from the light outgoing direction, a second overlapping area 1021 is arranged on one side of the flexible organic light emitting display panel 102 arranged below, which is close to the light outgoing direction, and the first overlapping area 1011 and the second overlapping area 1021 are adhered through the adhesive 14. This increases the robustness between the two flexible OLED panels. As shown in fig. 5, in order to clearly show the first overlapping area 1011 and the second overlapping area 1021, the flexible organic light emitting display panel 101 disposed thereon is set to have a transparency of 65%, so that the two overlapping areas can be clearly seen.
In one particular embodiment, the adhesive 14 may be an optical glue. As shown in fig. 7, which is another cross-sectional view at the position BB' in fig. 5 according to an embodiment of the present invention, in the embodiment, two overlapped flexible organic light emitting display panels 10 are bonded by the optical adhesive 12, so that on one hand, a process of applying an adhesive is saved, and on the other hand, the thickness of the flexible organic light emitting display device is reduced, so that the flexible organic light emitting display device is thinner.
As shown in FIG. 8, which is another schematic structural diagram of the flexible organic light emitting display device according to the embodiment of the present invention, in a rolled state, a rolling radius of at least two flexible organic light emitting display panels that are overlapped is R, where R ≧ 5mm. That is, the minimum radius of the flexible organic light emitting display device 500 is 5mm.
It should be noted that, in this embodiment, the flexible organic light emitting display device formed by splicing flexible organic light emitting display panels may include a plurality of flexible organic light emitting display panels, as shown in fig. 9 for example, which is another schematic structural diagram of the flexible organic light emitting display device provided in the embodiment of the present invention, and the flexible organic light emitting display device may include 3 flexible organic light emitting display panels arranged in an overlapping manner, and may also include 4 flexible organic light emitting display panels arranged in an overlapping manner.
In addition, the flexible organic light emitting display device 500 in this embodiment may be a mobile terminal, and specifically, the mobile terminal may include, but is not limited to, any electronic device with a display function, such as a Personal Computer (PC), a Personal Digital Assistant (PDA), a wireless handheld device, a Tablet Computer (Tablet Computer), an MP4 player, or a television.
Compared with the prior art, on the one hand, because the optical cement is close to the one side level of light-emitting side, make not have the space between polaroid and the optical cement, the refracting index of emergent light has not had the interference of air bed, has improved the display effect of flexible organic display device under crooked or crimping state, thereby the display effect of flexible organic display device under crooked or crimping state is close the display effect under the flat state, has improved flexible organic light-emitting display device's display quality. On the other hand, the whole optical cement is covered on the flexible organic light-emitting display panel, so that the adhesion between the polarizer and the flexible organic light-emitting display panel is firmer.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A flexible organic light emitting display device, comprising:
the display panel comprises at least two flexible organic light-emitting display panels which are arranged in an overlapped mode, wherein the light emitting directions of the at least two flexible organic light-emitting display panels are the same;
the polaroids are arranged on the light emitting sides of the at least two flexible organic light-emitting display panels in a laminated mode;
the optical adhesive is arranged between the polarizer and the at least two flexible organic light-emitting display panels and used for attaching the at least two flexible organic light-emitting display panels to the polarizer;
the optical adhesive covers at least two flexible organic light-emitting display panels, and one surface of the optical adhesive, which is close to the light emergent side, is kept in a flat state, so that the display effect in a bent or curled state is consistent with the display effect in a flat state;
the thickness of the optical adhesive contacting with the flexible organic light-emitting display panel arranged on the flexible organic light-emitting display panel along the light emergent direction is h1, and h1 is more than or equal to 0.05mm and less than or equal to 0.15mm; the thickness of the optical adhesive in contact with the flexible organic light-emitting display panel arranged below is h2, and h2 is more than or equal to 0.25mm and less than or equal to 0.35mm;
the shading adhesive tape is used for bonding the surfaces, far away from the light emergent side, of the at least two flexible organic light-emitting display panels which are arranged in an overlapped mode;
the shading adhesive tape is used for bonding the junction of at least two overlapped flexible organic light-emitting display panels far away from the light emergent side;
in the direction perpendicular to the light emergent direction, the width of the shading adhesive tape is K, and K is more than or equal to 0.8cm and less than or equal to 1.5cm.
2. A flexible organic light emitting display device according to claim 1,
the light transmittance T of the optical cement is more than or equal to 98 percent.
3. A flexible organic light emitting display device according to claim 1,
the shading adhesive tape is an anti-static adhesive tape.
4. The flexible organic light emitting display device according to claim 1, further comprising:
the adhesive is arranged along the light emitting direction, a first overlapping area is arranged on one side, deviating from the light emitting direction, of the flexible organic light emitting display panel arranged on the adhesive, a second overlapping area is arranged on one side, close to the light emitting direction, of the flexible organic light emitting display panel arranged below the adhesive, and the first overlapping area is adhered to the second overlapping area through the adhesive.
5. A flexible organic light emitting display device according to claim 4,
the adhesive is the optical cement.
6. A flexible organic light emitting display device according to claim 1,
in a curling state, the curling radius of at least two overlapped flexible organic light-emitting display panels is R, and R is larger than or equal to 5mm.
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| CN110610664B (en) * | 2019-09-25 | 2021-11-30 | 云谷（固安）科技有限公司 | Cover plate with polarization function, flexible display panel and rollable display device |
| CN111640377B (en) * | 2020-06-30 | 2022-06-03 | 上海天马微电子有限公司 | Display module and display device |
| CN112940638B (en) * | 2021-02-01 | 2023-01-03 | 武汉天马微电子有限公司 | Composite adhesive tape, display device and manufacturing method thereof |
| CN113093942A (en) * | 2021-04-13 | 2021-07-09 | 业成科技（成都）有限公司 | Display assembly and manufacturing method thereof, touch display module and electronic equipment |
| CN115132091B (en) * | 2022-07-20 | 2023-05-09 | 武汉华星光电半导体显示技术有限公司 | Splice module and electronic device |
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| CN106663396A (en) * | 2014-08-08 | 2017-05-10 | 株式会社半导体能源研究所 | Display device |
| CN206282058U (en) * | 2015-12-22 | 2017-06-27 | 株式会社日本显示器 | Display device and image display panel |
| CN106020336A (en) * | 2016-04-28 | 2016-10-12 | 蚌埠国显科技有限公司 | Multi-dimensional deformable display screen |
| CN205581451U (en) * | 2016-04-29 | 2016-09-14 | 上海中航光电子有限公司 | Display device |
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| CN109509404A (en) | 2019-03-22 |
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Application publication date: 20190322 Assignee: BAZHOU YUNGU ELECTRONIC TECHNOLOGY Co.,Ltd.|KUNSHAN NEW FLAT PANEL DISPLAY TECHNOLOGY CENTER Co.,Ltd.|KUNSHAN GO-VISIONOX OPTO-ELECTRONICS Co.,Ltd. Assignor: YUNGU (GU'AN) TECHNOLOGY Co.,Ltd. Contract record no.: X2019990000155 Denomination of invention: FLEXIBLE ORGANIC LIGHT EMITTING DISPLAY DEVICE License type: Common License Record date: 20191030 |
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Effective date of registration: 20191210 Address after: No. 2 Xiangshan Avenue, Yongning Street, Zengcheng District, Guangzhou, Guangdong province (the core of Zengcheng economic and Technological Development Zone) Applicant after: Guangzhou Guoxian Technology Co.,Ltd. Address before: 065500 Hebei Langfang County Guan emerging industry demonstration area Applicant before: YUNGU (GU'AN) TECHNOLOGY Co.,Ltd. |
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