Light-emitting device

Abstract

The embodiment of the invention discloses a light-emitting device, and the device comprises a substrate which comprises a light-emitting region and a non-light-emitting region surrounding the light-emitting region; the light-emitting area comprises a plurality of light-emitting units, and each light-emitting unit comprises a first electrode, a light-emitting layer and a second electrode; the non-luminous area comprises a binding area, the binding area comprises a plurality of first external pins, and the first electrodes are electrically connected with the first external pins through first electrode leads; at least one conductive block is arranged between the binding area and the light-emitting area, and the second electrode is electrically connected with the conductive block in a contact manner; the at least one conductive block comprises a first tip, the at least one first electrode lead comprises a second tip, and the first tip and the second tip are oppositely arranged. The embodiment of the invention can prevent static electricity from damaging the light-emitting unit and improve the reliability of the light-emitting device.

Description

Technical Field

[0001] The present invention relates to the field of anti-static technology, and in particular to a light-emitting device. Background Art

[0002] Organic Light-Emitting Diode (OLED) is a new type of display and lighting technology that is gradually being widely used. OLED has the risk of failure under the action of static electricity, so a highly reliable anti-static method is needed. Summary of the invention

[0003] The present invention provides a light-emitting device and a highly reliable electrostatic discharge method, which can avoid electrostatic damage to the light-emitting unit and improve the reliability of the light-emitting device.

[0004] According to one aspect of the present invention, there is provided a light emitting device, comprising:

[0005] A substrate, the substrate comprising a light-emitting area and a non-light-emitting area arranged around the light-emitting area;

[0006] The light-emitting area includes a plurality of light-emitting units, each of which includes a first electrode, a light-emitting layer, and a second electrode;

[0007] The non-luminescent area includes a binding area, the binding area includes a plurality of first external pins, and the first electrode is electrically connected to the first external pins through a first electrode lead;

[0008] At least one conductive block is arranged between the binding area and the light emitting area, and the second electrode is in contact and electrically connected with the conductive block;

[0009] At least one conductive block includes a first tip, and at least one first electrode lead includes a second tip. The first tip and the second tip are arranged opposite to each other.

[0010] Optionally, the distance between the first tip and the second tip is 0.1um-5um;

[0011] The angle range of the first tip is greater than or equal to 5° and less than or equal to 30°, and the angle range of the second tip is greater than or equal to 5° and less than or equal to 30°.

[0012] Optionally, the first electrode lead includes a protruding portion, and the second tip is disposed on a side of the protruding portion adjacent to the conductive block;

[0013] Each protrusion is provided with a plurality of second tips.

[0014] Optionally, the first tip and the second tip are arranged in the same layer;

[0015] The angle range of the first tip is greater than or equal to 5° and less than 30°, and the angle range of the second tip is greater than or equal to 5° and less than 30°.

[0016] Optionally, the apex of the first tip is adjacent to the side of the second tip, and the apex of the second tip is adjacent to the side of the first tip.

[0017] Optionally, a section of the first electrode lead opposite to the conductive block includes a first lead segment and a second lead segment, and the first lead segment and the second lead segment are connected in parallel;

[0018] The first lead segment is located at a side of the second lead segment adjacent to the conductive block; the second tip is arranged at a side of the first lead segment adjacent to the conductive block; and the line width of the first lead segment is greater than that of the second lead segment.

[0019] Optionally, the gap between the first tip and the second tip is filled with air, an inert gas or silicon oxide.

[0020] Optionally, the first tip and the second tip are made of different materials.

[0021] Optionally, the material of the first tip is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO;

[0022] The material used for the second tip is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO.

[0023] Optionally, the binding area further includes a second external pin, the non-luminous area further includes a lap pin, the second electrode is in contact and electrically connected to the lap pin, and the lap pin is electrically connected to the second external pin via a second electrode lead.

[0024] In the embodiment of the present invention, at least one conductive block is arranged between the binding area and the light-emitting area, and the second electrode is in contact with the conductive block and electrically connected; at least one conductive block includes a first tip, and at least one first electrode lead includes a second tip, and the first tip and the second tip are arranged opposite to each other. When static electricity acts on the light-emitting device, tip discharge occurs between the first tip and the second tip to release the static electricity, thereby preventing static electricity from damaging the light-emitting unit. The first tip is arranged on the first electrode lead electrically connected to the first electrode, and the second tip is arranged on the conductive block electrically connected to the second electrode. The first electrode and the second electrode have a potential difference to form a current path, thereby making it easier for static electricity to be released between the first tip and the second tip, further ensuring that static electricity will not damage the light-emitting unit. Therefore, the static electricity release method of this embodiment has higher reliability.

[0025] It should be understood that the contents described in this section are not intended to identify the key or important features of the embodiments of the present invention, nor are they intended to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 is a structural schematic diagram of a light emitting device provided by an embodiment of the present invention;

[0028] Figure 2 is a partial enlarged view of a light emitting device provided by an embodiment of the present invention;

[0029] Figure 3 is a partial enlarged view of another light emitting device provided by an embodiment of the present invention;

[0030] Figure 4 is a partial enlarged view of another light emitting device provided by an embodiment of the present invention;

[0031] Figure 5 is a partial enlarged view of another light emitting device provided by an embodiment of the present invention;

[0032] Figure 6 is a schematic diagram of a process for manufacturing a tip of another light emitting device provided by an embodiment of the present invention;

[0033] Figure 7 It is a schematic structural diagram of another light emitting device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0034] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0035] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0036] An embodiment of the present invention provides a light emitting device, Figure 1 is a structural schematic diagram of a light emitting device provided by an embodiment of the present invention, Figure 2 It is a partial enlarged view of a light emitting device provided by an embodiment of the present invention.

[0037] refer to Figure 1 and Figure 2 , the light emitting device comprises:

[0038] A substrate 100, the substrate 100 includes a light-emitting area 200 and a non-light-emitting area 300 arranged around the light-emitting area;

[0039] The light-emitting area 200 includes a plurality of light-emitting units 20 , each of which includes a first electrode 21 , a light-emitting layer, and a second electrode 22 ;

[0040] The non-luminescent area 300 includes a binding area 30 , the binding area 30 includes a plurality of first external pins 31 , and the first electrode 21 is electrically connected to the first external pins 31 through a first electrode lead 32 ;

[0041] At least one conductive block 33 is disposed between the binding area 30 and the light emitting area 200 , and the second electrode 22 is in contact and electrically connected with the conductive block 33 ;

[0042] At least one conductive block 33 includes a first tip 301 , and at least one first electrode lead 32 includes a second tip 302 . The first tip 301 and the second tip 302 are disposed opposite to each other.

[0043] Among them, the light-emitting unit 20 can be an organic light-emitting unit, one of the first electrode 21 and the second electrode 22 is an anode and the other is a cathode, and the light-emitting layer is an organic light-emitting layer. The light-emitting layer is not shown in the figure, and the light-emitting layer is arranged between the first electrode 21 and the second electrode 22. The light-emitting unit 20 can also include film layers such as an electron injection layer, an electron transport layer, a hole blocking layer, an electron blocking layer, a hole transport layer and a hole injection layer. The binding area 30 is used to bind an external circuit, and the external circuit is electrically connected to the first external pin 31. The external circuit sends a driving signal to the first electrode lead 32 connected to the first external pin 31 to drive the light-emitting unit 20 to emit light. The conductive block 33 is electrically connected to the second electrode 22 in a lap connection, and the conductive block 33 and the second electrode 22 have the same potential. The conductive block 33 can be electrically connected only to the second electrode 22 and not to other conductive structures. The number of conductive blocks 33 can be one, two or more. The first tip 301 and the second tip 302 both have sharp tops. When static electricity acts on the light-emitting device, the first tip 301 and the second tip 302 discharge the static electricity to avoid static electricity damaging the light-emitting unit 20.

[0044] In the embodiment of the present invention, at least one conductive block 33 is arranged between the binding area 30 and the light-emitting area 200, and the second electrode 22 is in contact with the conductive block 33 and electrically connected; at least one conductive block 33 includes a first tip 301, and at least one first electrode lead 32 includes a second tip 302, and the first tip 301 and the second tip 302 are arranged opposite to each other. When static electricity acts on the light-emitting device, tip discharge occurs between the first tip 301 and the second tip 302 to release the static electricity and prevent static electricity from damaging the light-emitting unit 20. The first tip 301 is arranged on the first electrode lead 32 electrically connected to the first electrode 21, and the second tip 302 is arranged on the conductive block 33 electrically connected to the second electrode 22. The first electrode 21 and the second electrode 22 have a potential difference to form a current path, so that static electricity is more easily released between the first tip 301 and the second tip 302, further ensuring that static electricity will not damage the light-emitting unit 20. Therefore, the static electricity release method of this embodiment has higher reliability.

[0045] Based on the above embodiment, optionally, the distance between the first tip 301 and the second tip 302 is 0.1um-5um;

[0046] The angle range of the first tip 301 is greater than or equal to 5° and less than or equal to 30°, and the angle range of the second tip 302 is greater than or equal to 5° and less than or equal to 30°. Exemplarily, the angle of the first tip 301 may be 5°, 10°, 15°, 20°, 25°, 28°, 30°, etc.; the angle of the second tip 302 may be 5°, 10°, 15°, 20°, 25°, 28°, 30°, etc.; preferably, the angle range of the first tip is greater than or equal to 5° and less than 30°, and the angle range of the second tip is greater than or equal to 5° and less than 30°.

[0047] Specifically, the smaller the distance between the first tip 301 and the second tip 302, the easier it is for tip discharge to occur between the first tip 301 and the second tip 302, and the smaller the angle between the first tip 301 and the second tip 302, the easier it is for tip discharge to occur. By setting the distance between the first tip 301 and the second tip 302 to 0.1um-5um; the angle range of the first tip 301 is greater than or equal to 5° and less than or equal to 30°, and the angle range of the second tip 302 is greater than or equal to 5° and less than or equal to 30°, when static electricity acts on the light-emitting device, tip discharge is more likely to occur between the first tip 301 and the second tip 302, which can better avoid static electricity from damaging the light-emitting unit 20, improve the reliability of static electricity release, and improve the reliability of the light-emitting device.

[0048] Figure 3 is a partial enlarged view of another light emitting device provided in an embodiment of the present invention. Based on the above embodiment, optionally, refer to Figure 3 , the first electrode lead 32 includes a protruding portion 303 , and the second tip 302 is disposed on a side of the protruding portion 303 adjacent to the conductive block 33 ;

[0049] A plurality of second tips 302 are disposed on each protrusion 303 .

[0050] Specifically, static electricity is more likely to accumulate at the protruding position, and by arranging the second tip 302 on the protruding portion 303, static electricity is more likely to be discharged at the first tip 301 and the second tip 302, thereby better preventing the light-emitting unit from being damaged by static electricity. Furthermore, by arranging a plurality of second tips 302 on the protruding portion 303, while increasing the discharge rate, after one or some second tips 302 are damaged by static electricity, other second tips 302 continue to discharge static electricity.

[0051] On the basis of the above embodiment, optionally, the first electrode lead 32 includes a bending corner, and the bending corner is a protrusion 303 .

[0052] Specifically, the protruding top corner of the bent corner faces the conductive block 33 , and a plurality of second discharge tips 302 are disposed on the protruding top corner of the bent corner.

[0053] Optionally, the first tip 301 and the second tip 302 are arranged in the same layer;

[0054] The angle range of the first tip is greater than or equal to 5° and less than 30°, and the angle range of the second tip is greater than or equal to 5° and less than 30°.

[0055] Specifically, the first tip 301 and the second tip 302 are arranged on the same layer, and the angle range of the first tip is greater than or equal to 5° and less than 30°, and the angle range of the second tip is greater than or equal to 5° and less than 30°, so that tip discharge is more likely to occur between the first tip 301 and the second tip 302, and static electricity can be better released. When the first tip 301 and the second tip 302 are made of the same material, the first tip 301 and the second tip 302 are arranged on the same layer, so that the first tip 301 and the second tip 302 can be prepared in the same process, thereby reducing the process cost.

[0056] Figure 4 is a partial enlarged view of another light emitting device provided by an embodiment of the present invention. Figure 4 The vertex of the first tip 301 is adjacent to the side of the second tip 302 , and the vertex of the second tip 302 is adjacent to the side of the first tip 301 .

[0057] Specifically, the staggered design of the first tip 301 and the second tip 302 makes the first tip 301 and the second tip 302 closer to each other and have a larger relative area, so that tip discharge is more likely to occur between the first tip 301 and the second tip 302, thereby better releasing static electricity.

[0058] Figure 5 is a partial enlarged view of another light emitting device provided by an embodiment of the present invention. Figure 5 , the section of the first electrode lead 32 opposite to the conductive block 33 includes a first lead segment 304 and a second lead segment 305, and the first lead segment 304 and the second lead segment 305 are connected in parallel;

[0059] The first lead segment 304 is located at a side of the second lead segment 305 adjacent to the conductive block 33 ; the second tip 302 is disposed at a side of the first lead segment 304 adjacent to the conductive block 33 ; the line width of the first lead segment 304 is greater than the line width of the second lead segment 305 .

[0060] Specifically, the first lead segment 304 and the second lead segment 305 are connected in parallel, and the line width of the first lead segment 304 is greater than the line width of the second lead segment 305, so that the resistance of the first lead segment 304 is less than the resistance of the second lead segment 305, so that the current flowing through the first lead segment 304 is greater than the current flowing through the second lead segment 305, and the first lead segment 304 is subjected to greater static electricity, and the second tip 302 is arranged on the first lead segment 304, so that static electricity is more likely to accumulate in the first lead segment 304 and the second tip 302, and the first tip 301 and the second tip 302 are more likely to discharge the tip and release the static electricity. And when the static electricity is large, causing the first lead segment 304 to be damaged and disconnected by static electricity during tip discharge, the second lead segment 305 can still transmit the driving signal, thereby not affecting the light emission of the light-emitting unit. Therefore, the scheme implemented by the present invention can release static electricity while ensuring that the signal transmission of the first electrode lead 32 is not affected, and the reliability of the light-emitting device can be further improved.

[0061] Based on the above embodiment, optionally, the gap between the first tip 301 and the second tip 302 is filled with air, an inert gas or silicon oxide.

[0062] The inert gas may be nitrogen, etc. By filling air, inert gas or silicon oxide, the medium between the first tip 301 and the second tip 302 is less likely to be broken down, thereby increasing the service life of the first tip 301 and the second tip 302. Exemplarily, the breakdown field strength of silicon oxide is more than 1,000 times that of air. By filling silicon oxide in the gap between the first tip 301 and the second tip 302, the gap between the first tip 301 and the second tip 302 is less likely to be broken down, thereby releasing greater static electricity.

[0063] Figure 6 FIG. 1 is a schematic diagram of another tip manufacturing process of a light emitting device provided by an embodiment of the present invention. Figure 6 The first tip 301 and the second tip 302 are made of different materials.

[0064] Specifically, refer to Figure 5When the first tip 301 and the second tip 302 are made of different materials, different etching materials can be used for etching when the first tip 301 and the second tip 302 are manufactured. For example, the first tip 301 is manufactured first, and when the second tip 302 is manufactured, the material for manufacturing the second tip 302 can cover the first tip 301, and then the second tip 302 is formed by etching the material. Since the material of the second tip 302 covers the first tip 301, the second tip 302 formed by etching can be closer to the first tip 301, making it easier for the first tip 301 and the second tip 302 to discharge. Similarly, the second tip 302 is manufactured first, and when the first tip 301 is manufactured, the material of the first tip 301 can cover the second tip 302, and then the first tip 301 is formed by etching the material. Since the material of the first tip 301 covers the second tip 302, the first tip 301 formed by etching can be closer to the second tip 302, making it easier for the first tip 301 and the second tip 302 to discharge.

[0065] Optionally, the material of the first tip 301 is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO;

[0066] The material of the second tip 302 is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO.

[0067] Wherein, the first tip 301 and the second tip 302 can both adopt AlMo laminated structure, MoAlMo laminated structure, AlTi laminated structure or TiAlTi laminated structure, and can also adopt ITO or AZO material. Exemplarily, when the first tip 301 and the second tip 302 are in the same layer as the first electrode lead, the first tip 301 and the second tip 302 and the first electrode lead adopt the same material, and the material of the first electrode lead can be one of AlMo, MoAlMo, AlTi and TiAlTi. When the first tip 301 and the second tip 302 are arranged in the same layer as the first electrode, the first tip 301 and the second tip 302 can adopt the same material as the first electrode, and the material of the first electrode can be ITO or AZO. In addition, when the first tip 301 and the second tip 302 adopt different materials, the first tip 301 can adopt one or more materials of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO, and the second tip 302 adopts a material different from the first tip 301. Exemplarily, the first tip 301 is made of ITO material, and the second tip 302 is made of AlMo, MoAlMo, AlTi or TiAlTi; or, the second tip 302 is made of ITO material, and the first tip 301 is made of AlMo, MoAlMo, AlTi or TiAlTi.

[0068] Figure 7 FIG. 1 is a schematic diagram of another light emitting device provided by an embodiment of the present invention. Figure 7 The binding area 30 also includes a second external pin 34 , and the non-luminous area 300 also includes a lap pin 35 . The second electrode 22 is in contact and electrically connected with the lap pin 35 . The lap pin 35 is electrically connected with the second external pin 34 through a second electrode lead 36 .

[0069] Specifically, the second external pin 34 is used to connect a fixed potential, and the fixed potential is transmitted to the strapping pin 35 through the second electrode lead 36. The second electrode 22 is in contact and electrically connected with the strapping pin 35, so that the second electrode 22 and the conductive block 33 are connected to a fixed potential.

[0070] It should be understood that the various forms of processes shown above can be used to reorder, add or delete steps. For example, the steps described in the present invention can be executed in parallel, sequentially or in different orders, as long as the desired results of the technical solution of the present invention can be achieved, and this document does not limit this.

[0071] The above specific implementations do not constitute a limitation on the protection scope of the present invention. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A light emitting device, characterized in that: include: A substrate, the substrate comprising a light-emitting area and a non-light-emitting area arranged around the light-emitting area; The light-emitting area includes a plurality of light-emitting units, each of which includes a first electrode, a light-emitting layer, and a second electrode; The non-luminescent area includes a binding area, the binding area includes a plurality of first external pins, and the first electrode is electrically connected to the first external pins through a first electrode lead; At least one conductive block is disposed between the binding area and the light emitting area, and the second electrode is in contact and electrically connected with the conductive block; At least one of the conductive blocks includes a first tip, and at least one of the first electrode leads includes a second tip, and the first tip and the second tip are arranged opposite to each other.

2. The light emitting device according to claim 1, characterized in that: The distance between the first tip and the second tip is 0.1um-5um; The angle range of the first tip is greater than or equal to 5° and less than or equal to 30°, and the angle range of the second tip is greater than or equal to 5° and less than or equal to 30°.

3. The light emitting device according to claim 1, characterized in that: The first electrode lead comprises a protruding portion, and the second tip is arranged on a side of the protruding portion adjacent to the conductive block; Each of the protruding parts is provided with a plurality of second tips.

4. The light emitting device according to claim 1, characterized in that: The first tip and the second tip are arranged in the same layer; The angle range of the first tip is greater than or equal to 5° and less than 30°, and the angle range of the second tip is greater than or equal to 5° and less than 30°.

5. The light emitting device according to claim 1, characterized in that: The apex of the first tip is adjacent to the side of the second tip, and the apex of the second tip is adjacent to the side of the first tip.

6. The light emitting device according to claim 1, characterized in that: The section of the first electrode lead opposite to the conductive block includes a first lead segment and a second lead segment, and the first lead segment and the second lead segment are connected in parallel; The first lead segment is located at a side of the second lead segment adjacent to the conductive block; the second tip is arranged at a side of the first lead segment adjacent to the conductive block; and the line width of the first lead segment is greater than the line width of the second lead segment.

7. The light emitting device according to claim 1, characterized in that: The gap between the first tip and the second tip is filled with air, an inert gas or silicon oxide.

8. The light emitting device according to claim 1, characterized in that: The first tip and the second tip are made of different materials.

9. The light emitting device according to claim 1, characterized in that: The material of the first tip is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO; The material used for the second tip is at least one of AlMo, MoAlMo, AlTi, TiAlTi, ITO and AZO.

10. The light emitting device according to claim 1, characterized in that: The binding area further includes a second external pin, the non-luminous area further includes a lap pin, the second electrode is in contact and electrically connected with the lap pin, and the lap pin is electrically connected with the second external pin through a second electrode lead.

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