CN113299706A - Display panel and display device - Google Patents
Display panel and display device Download PDFInfo
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- CN113299706A CN113299706A CN202110511054.4A CN202110511054A CN113299706A CN 113299706 A CN113299706 A CN 113299706A CN 202110511054 A CN202110511054 A CN 202110511054A CN 113299706 A CN113299706 A CN 113299706A
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- display panel
- area
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/85—Arrangements for extracting light from the devices
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- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
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Abstract
The invention provides a display panel and a display device. The display panel comprises a display area, a non-display area and a polaroid, wherein the non-display area is positioned on the periphery of the display area, a press fit area is arranged in the non-display area positioned on one side of the display area along a first direction, at least one grounding terminal is arranged in the press fit area, and the polaroid is arranged corresponding to an area outside the press fit area; the polarizer is electrically connected with the grounding terminal through conductive adhesive, and the conductive adhesive extends from the edge to the center along the first direction. According to the invention, the conductive adhesive extends from the edge to the center along the first direction, so that the conductive area between the conductive adhesive and the polaroid is increased, the conductive effect is improved, the poor appearance of the display panel caused by the conductive adhesive overflowing to the display area is avoided, and the risk of the conductive adhesive breaking is also reduced.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel and a display device.
Background
An Organic Light-Emitting Diode (OLED) display panel has advantages of self-luminescence, wide viewing angle, high contrast, low power consumption, fast response speed, and the like, and is receiving wide attention. The OLED display panel mainly includes a TFT (Thin Film Transistor) backplane, an organic light emitting layer, a glass cover plate, and the like, and since the glass cover plate is easily affected by ambient light, a polarizer needs to be disposed between the organic light emitting layer and the glass cover plate to eliminate the ambient light, so that the chromaticity and the brightness of light emitted by the OLED display panel are more uniform. However, after the polarizer is attached, static electricity remains on the surface of the polarizer, and the residual static electricity affects the display effect of the OLED display panel. In the prior art, metal glue is usually arranged at the edge of the polarizer and is connected with the grounding terminal, so that static electricity on the surface of the polarizer is conducted to the grounding terminal through the metal glue, the static electricity is released, and the display effect of the OLED display panel under the condition of static electricity accumulation is effectively improved.
At present, narrow frame design has become the mainstream in the market, and because the frame narrows down for the pressfitting point of OLED display panel glues the region and diminishes, and the point of metal glue is glued the shape and is blocky, and blocky metal glue overflows easily to the display area and causes the outward appearance bad. In addition, in the manufacturing process or the using process of the OLED display panel, when the OLED display panel is affected by thermal shock or external force shock, the metal glue arranged at the edge of the polarizer is often damaged or even broken, so that static electricity on the surface of the polarizer cannot be led out, the display effect of the OLED display panel is finally affected, and the time for machine tuning and downtime is increased. Therefore, it is necessary to improve this defect.
Disclosure of Invention
The embodiment of the invention provides a display panel, which is used for solving the technical problems that in the prior art, due to the fact that a frame of the display panel is narrowed, blocky metal glue overflows to a display area to cause poor appearance and the metal glue is easy to break.
The embodiment of the invention provides a display panel, which comprises a display area, a non-display area and a polaroid, wherein the non-display area is positioned at the periphery of the display area, the non-display area positioned at one side of the display area along a first direction is provided with a press fit area, at least one grounding terminal is arranged in the press fit area, the display panel also comprises the polaroid, and the polaroid is arranged corresponding to the area outside the press fit area; the polarizer is electrically connected with the grounding terminal through conductive adhesive, and the conductive adhesive extends from the edge to the center along the first direction.
In the display panel provided by the embodiment of the invention, the conductive adhesive is silver adhesive.
In the display panel provided by the embodiment of the invention, the stitching region is provided with two ground terminals, and the two ground terminals are symmetrically distributed on two sides of the stitching region along a second direction perpendicular to the first direction.
In the display panel provided by the embodiment of the invention, the cross section of the conductive adhesive is in a shape of a rounded rectangle, and a long side of the rounded rectangle extends from the edge to the center along the first direction.
In the display panel provided in the embodiment of the present invention, the cross-sectional shape of the conductive paste is an ellipse, and a major axis of the ellipse extends from the edge to the center along the first direction.
In the display panel provided in the embodiment of the present invention, the cross-sectional shape of the conductive paste is crescent, a line formed by connecting two ends of the crescent extends from an edge to a center along the first direction, and a concave surface of the crescent is located on a side away from the display area.
In the display panel provided in the embodiment of the present invention, the display panel further includes a thin film transistor array disposed below the polarizer, and the ground terminal and the thin film transistor array are disposed in the same layer.
In the display panel provided by the embodiment of the invention, the thickness of the conductive adhesive is more than 120 micrometers and less than 180 micrometers.
In the display panel provided by the embodiment of the invention, the length of the cross section of the conductive adhesive is greater than 200 micrometers and less than 300 micrometers, and the width of the cross section of the conductive adhesive is greater than 50 micrometers and less than 150 micrometers.
The embodiment of the invention also provides a display device which comprises the display panel.
Has the advantages that: the display panel provided by the embodiment of the invention comprises a display area, a non-display area positioned at the periphery of the display area, a press fit area arranged on the non-display area positioned at one side of the display area along a first direction, at least one grounding terminal arranged in the press fit area, and a polaroid arranged corresponding to the area outside the press fit area; the polarizer is electrically connected with the grounding terminal through conductive adhesive, and the conductive adhesive extends from the edge to the center along the first direction. According to the invention, the conductive adhesive extends from the edge to the center along the first direction, so that the conductive area between the conductive adhesive and the polaroid is increased, the conductive effect is improved, the poor appearance of the display panel caused by the conductive adhesive overflowing to the display area is avoided, and the risk of the conductive adhesive breaking is also reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below.
Fig. 1 is a schematic diagram of a basic structure of a display panel according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a basic structure of another display panel according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a basic structure of another display panel according to an embodiment of the present invention.
Fig. 4 is a comparison graph of conductive areas before and after optimization of the conductive adhesive arrangement provided by the embodiment of the invention.
Fig. 5 is a graph comparing the defective rates before and after the conductive adhesive arrangement method provided by the embodiment of the present invention is optimized.
Fig. 6 is a comparison graph of the gluing thickness before and after optimization of the conductive adhesive arrangement provided by the embodiment of the invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the size and thickness of components illustrated in the drawings are not to scale for clarity and ease of understanding and description.
As shown in fig. 1, which is a schematic diagram of a basic structure of a display panel according to an embodiment of the present invention, the display panel includes a display area a1, a non-display area a2 located around the display area a1, a stitching area a21 located in the non-display area a2 located on one side of the display area a1 along a first direction, at least one ground terminal 10 located in the stitching area a21, and a polarizer 20, where the polarizer 20 is located corresponding to an area outside the stitching area a 21; the polarizer 20 is electrically connected to the ground terminal 10 through a conductive adhesive 30, and the conductive adhesive 30 extends from the edge to the center along the first direction.
It should be noted that the bonding area a21 corresponds to a mounting area of a flip chip film (not shown) of the display panel. Specifically, the display panel needs to receive a driving signal provided by an external driver (not shown in the figure), and the external driver needs to be electrically connected to the display panel through the flip-chip film, so that at least one bonding region needs to be provided for disposing the flip-chip film to transmit the external driving signal.
It should be noted that the first direction refers to the arrangement direction of the stitching region a21, and if an external driving signal is transmitted from the bottom of the display panel (as shown in fig. 1), the first direction corresponds to a downward direction, and if an external driving signal is transmitted from the top of the display panel, the first direction corresponds to an upward direction.
It should be noted that the polarizer 20 is used for shielding ambient light to prevent the ambient light from affecting the display panel, but a large amount of static electricity is generated in the lamination process of the polarizer 20 to affect the display effect of the display panel, in order to release the static electricity on the polarizer 20, the ground terminal 10 is usually disposed in the lamination area a21, and the polarizer 20 is electrically connected to the ground terminal 10 by coating the conductive adhesive 30, so that the static electricity on the polarizer 20 is released through the ground terminal 10, thereby preventing the display effect of the display panel from being affected. However, the current conductive adhesive is coated in a block shape, and as the frame of the display panel becomes narrower, the width of the stitching area a21 also becomes smaller, and the block conductive adhesive easily overflows to the display area a1, which causes poor appearance of the display panel and affects the user experience. In the embodiment of the invention, the arrangement mode of the conductive adhesive 30 is changed to extend from the edge to the center along the first direction, so that the circuit on the laminating area A21 is not interfered, the contact area between the conductive adhesive 30 and the polarizer 20 is increased, the conductive effect is improved, the display panel appearance is prevented from being poor due to the fact that the conductive adhesive 30 overflows to the display area A1, and the risk of fracture of the conductive adhesive 30 is reduced.
Specifically, if the conductive adhesive is only in contact with the side surface of the polarizer according to the block coating in the prior art, if the conductive adhesive is broken, static electricity on the polarizer cannot be released, which may affect the display effect of the display panel. One end of the conductive adhesive 30 away from the first direction is located at the vertex angle of the non-display area a2, so that a larger coating space is provided, the contact area with the polarizer 20 can be increased, and the conductive adhesive 30 can be prevented from overflowing to the display area a1 to cause poor appearance, therefore, the arrangement mode of the conductive adhesive 30 provided by the embodiment of the invention can improve the conductive effect and prevent the display panel from having poor appearance, and the conductive adhesive 30 provided by the embodiment of the invention is obliquely arranged to avoid vertical contact with the polarizer 20, so that the stress is too large, and the conductive adhesive is easy to break.
In one embodiment, the conductive paste 30 is silver paste. The silver paste bonds the conductive particles together by the adhesive action of the matrix resin to form a conductive path, so as to realize the conductive connection of the adhered materials (the polarizer 20 and the grounding terminal 10). Specifically, the silver colloid mainly comprises a resin matrix, conductive particles, a dispersing additive, an auxiliary agent and the like. The resin matrix is generally a thermosetting adhesive, such as an adhesive system of epoxy resin, silicone resin, polyimide resin, phenolic resin, polyurethane, acrylic resin, and the like, and the adhesive forms a molecular skeleton structure of silver colloid after curing, provides guarantee for mechanical properties and adhesive properties, and fills conductive particles to form channels, wherein the conductive particles can be gold, silver, copper, aluminum, zinc, iron, nickel powder, graphite and some conductive compounds.
In one embodiment, the stitching region a21 is provided with two ground terminals 10, and the two ground terminals 10 are symmetrically distributed on two sides of the stitching region a21 along a second direction perpendicular to the first direction. It can be understood that, in the embodiment, by providing two ground terminals 10 and symmetrically distributing the two ground terminals on two sides of the pressing region a21, one ends of the two ground terminals 10 away from the first direction are both disposed at the vertex angle of the non-display region a2, so as to have a larger coating space, further increase the contact area with the polarizer 20, accelerate the release of static electricity, and further reduce the risk of the conductive adhesive 30 breaking, and if the conductive adhesive 30 at one end breaks, the conductive adhesive 30 at the other end can still release the static electricity of the polarizer 20.
It should be noted that the second direction is determined according to the first direction, and if the first direction is downward or upward, the second direction is leftward or rightward, that is, the two ground terminals 10 are respectively disposed at the left and right sides of the pressing area a 21.
In one embodiment, the cross-sectional shape of the conductive paste 30 is a rounded rectangle (as shown in fig. 1), the long side of the rounded rectangle extends from the edge to the center along the first direction, and the extension line of the short side of the rounded rectangle coincides with the bisector of the display area a1 near the top corner of the conductive paste 30. The long side of the cross section of the conductive adhesive 30 is greater than 200 micrometers and less than 300 micrometers, and the short side of the cross section of the conductive adhesive 30 is greater than 50 micrometers and less than 150 micrometers.
In an embodiment, the thickness of the conductive adhesive 30 is greater than 120 micrometers and less than 180 micrometers, and compared with the existing coating thickness of 350 micrometers to 456 micrometers, the thickness of the coating is reduced, and the production cost is reduced.
In one embodiment, the display panel further includes a thin film transistor array (not shown) disposed under the polarizer 20, and the ground terminal 10 is disposed in the same layer as the thin film transistor array. The grounding terminal 10 is provided with a groove 101, the cross section of the groove 101 is in a cross shape, the groove 101 is used for accommodating the conductive adhesive 30, the contact area between the conductive adhesive 30 and the grounding terminal 10 is further increased, and the conductive effect is improved.
Next, referring to fig. 2, a basic structure diagram of another display panel according to an embodiment of the present invention is shown, where the display panel includes a display area a1, a non-display area a2 located around the display area a1, the non-display area a2 located on one side of the display area a1 along a first direction is provided with a stitching area a21, at least one ground terminal 10 is disposed in the stitching area a21, the display panel further includes a polarizer 20, and the polarizer 20 is disposed corresponding to an area outside the stitching area a 21; the polarizer 20 is electrically connected to the ground terminal 10 through a conductive adhesive 30, and the conductive adhesive 30 extends from the edge to the center along the first direction.
In this embodiment, the cross-sectional shape of the conductive adhesive 30 is an ellipse, the major axis of the ellipse extends from the edge to the center along the first direction, and the extension line of the bisector of the display area a1 near the vertex angle of the conductive adhesive 30 coincides with one vertex of the ellipse. Wherein, the major axis of the cross section of the conductive adhesive 30 is larger than 200 micrometers and smaller than 300 micrometers, and the minor axis of the cross section of the conductive adhesive 30 is larger than 50 micrometers and smaller than 150 micrometers.
Next, referring to fig. 3, a basic structure diagram of another display panel according to an embodiment of the present invention is shown, where the display panel includes a display area a1, a non-display area a2 located around the display area a1, the non-display area a2 located on one side of the display area a1 along a first direction is provided with a stitching area a21, at least one ground terminal 10 is disposed in the stitching area a21, the display panel further includes a polarizer 20, and the polarizer 20 is disposed corresponding to an area outside the stitching area a 21; the polarizer 20 is electrically connected to the ground terminal 10 through a conductive adhesive 30, and the conductive adhesive 30 extends from the edge to the center along the first direction.
In this embodiment, the cross-sectional shape of the conductive paste 30 is a crescent shape, a line formed by connecting two ends of the crescent shape extends from the edge to the center along the first direction, and a concave surface of the crescent shape is located on a side away from the display area a 1. The line formed by connecting two ends of the cross section of the conductive adhesive 30 is greater than 200 micrometers and less than 300 micrometers, and the line formed by connecting the most concave point and the most convex point of the cross section of the conductive adhesive 30 is greater than 50 micrometers and less than 150 micrometers.
Next, referring to fig. 4, a comparison graph of conductive areas before and after optimization of the conductive adhesive arrangement method according to the embodiment of the present invention is shown, wherein the abscissa represents 100 samples, and the ordinate represents the conductive area (unit: square micron). The thicker solid line in the figure represents the conductive area before optimization (conductive paste is block coated) ranging from 60 to 90 square microns with an average of 83 square microns; the thin solid line represents the conductive area after optimization (the conductive paste is spread in the first direction extending from the edge to the center) and ranges between 120 and 160 square microns with an average of 148 square microns. The experimental data prove that the block-shaped coating mode is optimized into the coating mode extending from the edge to the center along the first direction, so that the conductive area of the conductive adhesive is integrally improved by 80%, and the conductive capability is greatly improved.
Next, referring to fig. 5, a comparison graph of the fraction defective before and after optimization of the conductive adhesive arrangement manner according to the embodiment of the present invention is shown, in which the abscissa indicates that 13 sampling sample groups exist, and the ordinate indicates the fraction defective. In the figure, the thicker solid line indicates: the fraction defective of the samples coated in the coating mode before optimization (block coating) in the first 5 sample groups ranged from 6.20% to 6.80%, with an average value of 6.50%; the latter 8 sample groups coated samples in an optimized coating pattern (extending from the edge to the center in the first direction) with a reject ratio in the range of 2.10% to 5.50%, with an average of 3.20%. The thin solid line indicates the target defect rate, which is 4.00%. The invention can be confirmed from experimental data that the block-shaped coating mode is optimized into the coating mode extending from the edge to the center along the first direction, so that the defects of the glue foreign matters in the display area of the display panel are reduced by 60 percent, the defect rate is lower than the target defect rate, and the risk of glue overflow is reduced.
Next, referring to fig. 6, a comparison graph of the paste thickness before and after optimization of the conductive paste arrangement method according to the embodiment of the present invention is shown, wherein the abscissa represents 13 sample groups, and the ordinate represents the paste thickness (unit: μm). In the figure, the thicker solid line indicates: the gumming thickness of the samples coated in the coating mode before optimization (block coating) for the first 5 sample groups ranged between 350 microns and 456 microns with an average value of 390 microns; the samples of the latter 8 sample groups coated in an optimized coating mode (coating extending from the edge to the center in the first direction) had a paste thickness in the range of 126 to 176 microns, with an average of 140 microns. The thinner solid line represents the target paste thickness, which is 0 microns. The invention can be confirmed from experimental data that the coating thickness is reduced, the usage amount of the adhesive material is reduced, and the material cost is reduced by optimizing the block-shaped coating mode into the coating mode extending from the edge to the center along the first direction.
An embodiment of the present invention further provides a display device, including the display panel, and please refer to fig. 1 to fig. 3 and related descriptions for specific structures of the display panel, which are not repeated herein. The display device provided by the embodiment of the invention can be as follows: products or components with display functions such as mobile phones, tablet computers, notebook computers, digital cameras, navigators and the like.
In summary, an embodiment of the present invention provides a display panel, including a display area, a non-display area located around the display area, where the non-display area located on one side of the display area along a first direction is provided with a pressing area, and the pressing area is provided with at least one ground terminal, and the display panel further includes a polarizer, where the polarizer is disposed corresponding to an area outside the pressing area; the polarizer is electrically connected with the grounding terminal through conductive adhesive, and the conductive adhesive extends from the edge to the center along the first direction. According to the invention, the conductive adhesive extends from the edge to the center along the first direction, so that the conductive area between the conductive adhesive and the polaroid is increased, the conductive effect is improved, the poor appearance of the display panel caused by the overflow of the conductive adhesive to the display area is avoided, the risk of the breakage of the conductive adhesive is also reduced, and the technical problems that the appearance is poor and the metal adhesive is easy to break caused by the overflow of the blocky metal adhesive to the display area due to the narrowing of the frame of the display panel in the prior art are solved.
The display panel and the display device provided by the embodiments of the present invention are described in detail above. It should be understood that the exemplary embodiments described herein should be considered merely illustrative for facilitating understanding of the method of the present invention and its core ideas, and not restrictive.
Claims (10)
1. A display panel comprises a display area and a non-display area positioned around the display area, and is characterized in that the non-display area positioned on one side of the display area along a first direction is provided with a press fit area, at least one grounding terminal is arranged in the press fit area, the display panel also comprises a polaroid, and the polaroid is arranged corresponding to an area outside the press fit area;
the polarizer is electrically connected with the grounding terminal through conductive adhesive, and the conductive adhesive extends from the edge to the center along the first direction.
2. The display panel of claim 1, wherein the conductive paste is silver paste.
3. The display panel of claim 1, wherein the bonding area is provided with two ground terminals, and the two ground terminals are symmetrically distributed on two sides of the bonding area along a second direction perpendicular to the first direction.
4. The display panel according to claim 3, wherein the cross-sectional shape of the conductive paste is a rounded rectangle, and a long side of the rounded rectangle extends from an edge to a center in the first direction.
5. The display panel according to claim 3, wherein a cross-sectional shape of the conductive paste is an ellipse, and a major axis of the ellipse extends from an edge to a center in the first direction.
6. The display panel according to claim 3, wherein the cross-sectional shape of the conductive paste is a crescent shape, a line connecting both ends of the crescent shape extends from an edge to a center in the first direction, and a concave surface of the crescent shape is located on a side away from the display region.
7. The display panel of claim 1, further comprising a thin film transistor array disposed under the polarizer, wherein the ground terminal is disposed in a same layer as the thin film transistor array.
8. The display panel of claim 1, wherein the conductive paste has a thickness greater than 120 microns and less than 180 microns.
9. The display panel of claim 1, wherein the length of the cross section of the conductive paste is greater than 200 microns and less than 300 microns, and the width of the cross section of the conductive paste is greater than 50 microns and less than 150 microns.
10. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110511054.4A CN113299706A (en) | 2021-05-11 | 2021-05-11 | Display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110511054.4A CN113299706A (en) | 2021-05-11 | 2021-05-11 | Display panel and display device |
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| CN113299706A true CN113299706A (en) | 2021-08-24 |
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| CN202110511054.4A Pending CN113299706A (en) | 2021-05-11 | 2021-05-11 | Display panel and display device |
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| CN115172366A (en) * | 2022-09-05 | 2022-10-11 | 晶通半导体(深圳)有限公司 | Gallium nitride device of monolithic integrated voltage divider |
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Application publication date: 20210824 |