CN113707019A - Display device and alignment mark identification method for display device binding area - Google Patents
Display device and alignment mark identification method for display device binding area Download PDFInfo
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- CN113707019A CN113707019A CN202111003672.4A CN202111003672A CN113707019A CN 113707019 A CN113707019 A CN 113707019A CN 202111003672 A CN202111003672 A CN 202111003672A CN 113707019 A CN113707019 A CN 113707019A
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L23/00—Details of semiconductor or other solid state devices
- H01L23/544—Marks applied to semiconductor devices or parts, e.g. registration marks, alignment structures, wafer maps
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/0277—Bendability or stretchability details
- H05K1/028—Bending or folding regions of flexible printed circuits
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/02—Details
- H05K1/11—Printed elements for providing electric connections to or between printed circuits
- H05K1/118—Printed elements for providing electric connections to or between printed circuits specially for flexible printed circuits, e.g. using folded portions
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L2223/00—Details relating to semiconductor or other solid state devices covered by the group H01L23/00
- H01L2223/544—Marks applied to semiconductor devices or parts
- H01L2223/54426—Marks applied to semiconductor devices or parts for alignment
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- Computer Hardware Design (AREA)
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- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
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Abstract
The invention provides a display device and a method for identifying alignment marks of a binding area of the display device, wherein the display device comprises a display panel, a flexible circuit board electrically connected with the binding area of the display panel and a back plate positioned at the back of the display panel; the binding region comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the connecting electrode group and the outer drain electrode group are in contraposition pressing; the alignment mark is at least positioned at the blank position of one side of the outer drain electrode group, specifically, virtual electrode groups are arranged on two sides of the outer drain electrode group, the alignment mark is arranged on the surface of the virtual electrode groups, and the alignment mark is used for identifying the accuracy of the electric connection between the display panel binding area and the flexible circuit board; wherein, the backplate corresponds is provided with the black light shield layer on the counterpoint mark position, and the influence that the counterpoint mark caused because of bubble, ground colour difference can be eliminated to the black light shield layer to improve the microcosmic picture definition of the position of counterpoint mark, improve the precision that discernment flexible circuit board bound, thereby promote display device production efficiency.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a method for identifying alignment marks of a binding area of the display device.
Background
In the modern communication industry, the market demands of products such as mobile phones, televisions, flat panels, notebooks, digital cameras and the like are increasing, various display devices are also developing towards larger sizes, larger screen occupation ratios and flexible screens, and in the production process of the flexible screens, the following problems are easy to occur in the current product design: 1. the flexible circuit board is attached to a backboard of the binding area to generate bubbles, so that the identification of the front alignment mark of the display panel is influenced; 2. the reinforcing plate is designed with a shielding layer according to the requirements of some customers, the shielding layer is generally made of a silver wave absorbing material, the alignment mark is generally made of molybdenum, the color of the alignment mark is silver white and gray brown, the alignment mark is just close to the color of the shielding layer and is not easy to identify, the alignment mark is bent to the north in the production process of a binding area, the color of the alignment mark is affected by the ground color of the silver wave absorbing material, and the alignment mark is easy to mistakenly grab or grab and fail during identification; the above abnormalities all affect the production efficiency of the equipment and the precision of the product.
Therefore, it is desirable to provide a display device and a method for identifying alignment marks in a bonding area of the display device, so as to solve the problem of poor accuracy identification of electrical alignment between the bonding area of the display panel and the flexible circuit board in the display device.
Disclosure of Invention
The embodiment of the invention provides a display device and a method for identifying alignment marks of a binding region of the display device, which can solve the problem of poor accuracy identification of electric connection alignment between the binding region of a display panel and a flexible circuit board in the display device in the prior art.
The embodiment of the invention provides a display device, which comprises a display panel, a flexible circuit board electrically connected with a binding area of the display panel and a back plate positioned at the back of the display panel; the binding area is provided with an alignment mark, and the alignment mark is used for identifying the accuracy of the electric connection between the display panel binding area and the flexible circuit board; and a black shading layer is arranged on the position of the back plate corresponding to the alignment mark.
According to a preferred embodiment of the present invention, the bonding region includes an outer drain electrode group, the flexible circuit board includes a connection electrode group, and the connection electrode group and the outer drain electrode group are pressed in an aligned manner; and the alignment mark is at least positioned at the blank of one side of the outer drain electrode group.
According to a preferred embodiment of the present invention, dummy electrode groups are disposed on two sides of the outer drain electrode group, and the alignment mark is disposed on a surface of the dummy electrode group.
According to a preferred embodiment of the present invention, the alignment mark is a cross-shaped structure, and the material of the cross-shaped structure is molybdenum.
According to a preferred embodiment of the invention, the back plate comprises a transparent PET base film and a transparent pressure sensitive adhesive layer positioned on the transparent PET base film, the black shading layer is of a complete structure, and the black shading layer is flush with the edge of the transparent PET base film;
the black shading layer is positioned on one side, far away from the transparent PET base film, of the transparent pressure sensitive adhesive layer; or, the black light shield layer is located transparent PET base film is kept away from transparent pressure sensitive adhesive layer one side, perhaps, the black light shield layer is located transparent PET base film with between the transparent pressure sensitive adhesive layer.
According to a preferred embodiment of the present invention, the back sheet includes a transparent PET base film and a transparent pressure sensitive adhesive layer on the transparent PET base film; the alignment marks comprise a first alignment mark and a second alignment mark, the first alignment mark and the second alignment mark are located on two sides of the binding area, the back plate is provided with a first black shading layer corresponding to the first alignment mark, and the back plate is provided with a second black shading layer corresponding to the second alignment mark.
According to a preferred embodiment of the present invention, a first partition area and a second partition area are respectively disposed on two sides of the transparent pressure sensitive adhesive layer, and the first black shading layer and the second black shading layer are respectively filled in the first partition area and the second partition area.
According to a preferred embodiment of the present invention, a first cut and a second cut are disposed between the transparent PET base film and the transparent pressure sensitive adhesive layer, and the first black light shielding layer and the second black light shielding layer are respectively filled in the first cut and the second cut.
According to a preferred embodiment of the present invention, the back sheet includes a transparent PET base film and the black light shielding layer on the transparent PET base film.
According to the display panel of the above embodiment, the present invention further provides a method for identifying alignment marks in a binding region of a display device, the method comprising:
step S10, providing a display panel to be bonded and a flexible circuit board, wherein the bonding area of the display panel comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the blank side of the bonding area is provided with an alignment mark.
And step S20, after the connection electrodes and the outer drain electrode group are aligned and pressed, the flexible circuit board is bound on the binding area of the display panel, shooting is carried out by adopting shooting equipment from the back of the display panel to the position of the alignment mark so as to obtain a microscopic picture of the corresponding alignment mark, and the shot microscopic picture is compared with the microscopic picture of the alignment mark in a standard state so as to identify the accuracy of the electric connection between the binding area of the display panel and the flexible circuit board.
The invention has the beneficial effects that: the embodiment of the invention provides a display device and a method for identifying alignment marks of a binding area of the display device, wherein the display device comprises a display panel, a flexible circuit board electrically connected with the binding area of the display panel and a back plate positioned at the back of the display panel; the binding region comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the connecting electrode group and the outer drain electrode group are in contraposition pressing; the display panel comprises an outer drain electrode group, an alignment mark, a flexible circuit board and a display panel binding area, wherein the alignment mark is at least positioned at the blank position of one side of the outer drain electrode group; wherein, the backplate corresponds is provided with the black light shield layer on the counterpoint mark position, and the influence that the counterpoint mark caused because of bubble, ground colour difference can be eliminated to the black light shield layer to improve the microcosmic picture definition of the position of counterpoint mark, improve the precision that discernment flexible circuit board bound, thereby promote display device production efficiency.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a structure of alignment marks on a back plate and a display panel in the prior art.
Fig. 2 is a schematic structural view of a micro-picture taken by a registration mark on a display panel in the prior art.
Fig. 3 is a schematic diagram of a film structure of a display device according to the present invention.
Fig. 4-8 are schematic diagrams of a backplane structure of a display device according to one aspect of the present invention.
Fig. 9 is a schematic diagram of a film structure of a bonding region in a display device according to the present invention.
FIGS. 10-13 are schematic views of another type of backplane structure in a display device according to the present invention.
FIGS. 14-16 are schematic views illustrating a black light-shielding layer in a back plate of a display device according to the present invention.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings that illustrate specific embodiments in which the invention may be practiced. The directional terms mentioned in the present invention, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terms used are used for explanation and understanding of the present invention, and are not used for limiting the present invention. In the drawings, elements having similar structures are denoted by the same reference numerals, and broken lines in the drawings indicate that the elements do not exist in the structures, and only the shapes and positions of the structures are explained.
As shown in fig. 1, the display device includes a display panel 14, a flexible circuit board bound in a binding area of the display panel and a back plate located at the back of the display panel, the back plate includes black bubble glue 11, a silver wave-absorbing material layer 12 and a transparent pressure-sensitive adhesive layer 13 located on the surface of the black bubble glue 11, after the flexible circuit board is bound in the binding area of the display panel, the precision of the flexible circuit board binding needs to be detected in batches, a camera device 16 is used for obtaining a microscopic picture of a position of an alignment mark, the photographed microscopic picture is compared with a microscopic picture of the alignment mark in a standard state, and the precision of the display panel binding area and the flexible circuit board electric connection is identified.
As shown in fig. 2 (a) and (b), the transparent pressure-sensitive adhesive layer 13 is likely to generate bubbles, the bubbles are different in size, and present an uneven state, and are likely to appear under the alignment mark, the bubbles in fig. 2 (a) are large and easily block the alignment mark 15, and the bubbles in fig. 2 (b) are large in number and annularly distributed, so that the microscopic image of the position of the alignment mark 15 is blurred, which affects the recognition of the alignment mark 15, and the image pickup device 16 captures the position of the alignment mark 15, and cannot acquire specific position information of the alignment mark 15, which seriously affects the recognition of the alignment mark 15. The microscopic pictures of the alignment marks 15 in (c) and (d) in fig. 2 are fuzzy, the silver wave-absorbing material layer 12 is generally a silver wave-absorbing material, and is bent to the north in the production process of the binding area, the colors of the alignment marks are affected by the bottom color of the silver wave-absorbing material, and the silver wave-absorbing material layer is easy to mistakenly grab or grab and fail during identification, so that the backboard of the type is used as a photographed substrate, the microscopic pictures of the positions of the alignment marks 15 are fuzzy, the identification is abnormal, the binding precision of the flexible circuit board cannot be identified, and the production efficiency of the equipment is influenced.
In view of the above technical problems, the present invention provides a display device, which includes a display panel, a flexible circuit board electrically connected to a display panel binding region, and a back plate located at the back of the display panel; the binding area is provided with the alignment mark, the backboard is provided with the black shading layer in the position corresponding to the alignment mark, the backboard does not contain silver wave absorbing materials, and the black shading layer can eliminate the influence of the alignment mark caused by air bubbles and bottom color difference, so that the definition of microscopic pictures of the position of the alignment mark is improved, and the binding precision of the flexible circuit board is improved.
As shown in fig. 3, the present invention provides a schematic structural diagram of a display device 100, the display device 100 includes a back plate 101, a display panel 102 located on the back plate 101, a polarizing layer 103 located on the display panel 102, an optical adhesive layer 104 located on the polarizing layer 103, a protective cover plate 105 located on the optical adhesive layer 104, and a flexible circuit board 1061 and a driving chip 1062 electrically connected to a bonding region 1022 of the display panel 102, the basic structure of the polarizing layer 103 includes a middle-most polyvinyl alcohol layer, three cellulose acetate layers located on two sides of the polyvinyl alcohol layer, a pressure sensitive adhesive layer located on two sides of the three cellulose acetate layers, and a release film layer, and the protective cover plate 105 is preferably a glass cover plate. The display panel 102 is preferably an OLED display panel or an LED display panel.
The bending section 1021 of the display panel 102 is bent to the back of the display device 100, a binding region 1022 is disposed at the end of the bending section 1021, an organic protection layer 1031 is disposed at the outer side of the polarizing layer 103, and the organic protection layer 1031 is attached to the bending section 1021 for protecting and buffering external force directly applied to the bending section 1021. The bonding region 1022 includes an outer drain electrode group, the flexible circuit board 1061 includes a connection electrode group, and the connection electrode group and the outer drain electrode group are aligned and pressed; the outer drain electrode group is also electrically connected with the driving chip 1062, and the blank of one side of the outer drain electrode group is provided with a counterpoint mark 1023, the counterpoint mark 1023 is of a cross-shaped structure, and the material of the cross-shaped structure is metal molybdenum. The back plate 101 is provided with a black light shielding layer 1013 at a position corresponding to the alignment mark 1023, and the back plate 101 of the embodiment includes a transparent PET base film 1011 and a transparent pressure sensitive adhesive layer 1012 on the transparent PET base film 1011, and the transparent PET base film 1011 is preferably a transparent polyethylene terephthalate film. Black light shield layer 1013 is located transparent pressure sensitive adhesive layer 1012 and separates the department, and black light shield layer 1013 can eliminate the counterpoint mark because of the influence that bubble, ground colour difference caused to improve production problems such as backplate 101 laminating bubble, silver grey ground colour, promote equipment production efficiency, guarantee the precision that flexible circuit board 1061 and driver chip 1062 bound. The black light-shielding layer 1013 is preferably a black matrix.
The invention improves the back plate, adds the black light-shielding layer 1013, and designs various alternative schemes, and the specific structure refers to fig. 4 to fig. 13.
Fig. 4-8 are schematic views of a backplane structure of a display device according to the present invention, wherein the black light shielding layer 1013 is a complete structure, and the black light shielding layer 1013 is flush with the edge of the backplane 101, as shown in fig. 4. Specifically, as shown in fig. 5, the back sheet 101 includes a transparent PET base film 1011 and a transparent pressure-sensitive adhesive layer 1012 on the transparent PET base film 1011, and the black light shielding layer 1013 is located on the side of the transparent pressure-sensitive adhesive layer 1012 away from the transparent PET base film 1011. As shown in fig. 6, the black light shielding layer 1013 is located between the transparent PET base film 1011 and the transparent pressure sensitive adhesive layer 1012. As shown in fig. 7, the black light shielding layer 1013 is located on the side of the transparent PET base film 1011 remote from the transparent pressure-sensitive adhesive layer 1012. As shown in fig. 8, the transparent pressure sensitive adhesive layer 1012 is not provided in the back sheet 101, and the back sheet 101 includes a transparent PET base film 1011 and a black light shielding layer 1013 on the transparent PET base film 1011.
FIGS. 9-13 are schematic diagrams of another type of backplane structure in a display device according to the present invention. In the back plate structure, the black light-shielding layer 1013 is a structure formed by combining a plurality of parts, and the black light-shielding layer 1013 is located at two ends of the back plate 101. As shown in fig. 9 and 10, the back sheet 101 includes a transparent PET base film 1011 and a transparent pressure-sensitive adhesive layer 1012 on the transparent PET base film 1011; the alignment mark 1023 includes a first alignment mark 10231 and a second alignment mark 10232 located at two sides of the bonding area, the backplane 101 is provided with a first black shading layer 10131 corresponding to the first alignment mark 10231, and the backplane 101 is provided with a second black shading layer 10132 corresponding to the second alignment mark 10232, referring to fig. 11-13.
As shown in fig. 11, the transparent pressure sensitive adhesive layer 1012 is symmetrically disposed on two sides as a first partition region and a second partition region, and the first black shading layer 10131 and the second black shading layer 10132 are respectively filled in the first partition region and the second partition region.
As shown in fig. 12, a first notch and a second notch are provided between the transparent PET base film 1011 and the transparent pressure sensitive adhesive layer 1012, and the first black shading layer 10131 and the second black shading layer 10132 fill the first notch and the second notch, respectively.
As shown in fig. 13, both ends of the transparent PET base film 1011 on the side away from the transparent pressure sensitive adhesive layer 1012 are provided with a first black light shielding layer 10131 and a second black light shielding layer 10132.
As shown in fig. 14, the present invention provides a specific method for preparing a black light-shielding layer 1013, in which a black light-shielding layer 1013 is deposited on a transparent PET base film 1011, and the edge of the black light-shielding layer 1013 is flush with the edge of the transparent PET base film 1011.
As shown in fig. 15, on the basis of the black light-shielding layer 1013 prepared in fig. 14, a back plate 101 of the transparent PET base film 1011 is formed by etching away a portion of the periphery of the black light-shielding layer 1013 by a single mask.
As shown in fig. 16, in addition to the black light-shielding layer 1013 prepared in fig. 15, a portion of the black light-shielding layer 1013 in the middle is etched through a photomask to form a first black light-shielding layer 10131 and a second black light-shielding layer 10132.
Aiming at the condition that the flexible circuit board 1061 in the upper display device is electrically connected with the binding region 1022 of the display panel 102, the binding region 1022 comprises an outer drain electrode group, the flexible circuit board 1061 comprises a connecting electrode group, and the connecting electrode group and the outer drain electrode group are aligned and pressed; the alignment mark 1023 is at least located at a blank of one side of the outer drain electrode set, specifically, two sides of the outer drain electrode set are provided with a virtual electrode set, and the alignment mark 1023 is located on the virtual electrode set.
According to the display panel of the above embodiment, the present invention further provides a method for identifying alignment marks in a binding region of a display device, the method comprising:
step S10, providing a display panel to be bound and a flexible circuit board, wherein the binding area of the display panel comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the blank side of the binding area is provided with an alignment mark; step S20, after the connection electrodes and the outer drain electrode group are aligned and pressed, so that the flexible circuit board is bound on the binding region of the display panel, and then a photographing device is used to photograph the alignment mark position from the back of the display panel to obtain a micro-picture of the corresponding alignment mark, and the photographed micro-picture is compared with the micro-picture of the alignment mark in a standard state to identify the accuracy of the electrical connection between the binding region of the display panel and the flexible circuit board.
The embodiment of the invention provides a display device and a method for identifying alignment marks of a binding area of the display device, wherein the display device comprises a display panel, a flexible circuit board electrically connected with the binding area of the display panel and a back plate positioned at the back of the display panel; the binding region comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the connecting electrode group and the outer drain electrode group are in contraposition pressing; the display panel comprises an outer drain electrode group, an alignment mark, a flexible circuit board and a display panel binding area, wherein the alignment mark is at least positioned at the blank position of one side of the outer drain electrode group; wherein, the backplate corresponds is provided with the black light shield layer on the counterpoint mark position, and the influence that the counterpoint mark caused because of bubble, ground colour difference can be eliminated to the black light shield layer to improve the microcosmic picture definition of the position of counterpoint mark, improve the precision that discernment flexible circuit board bound, thereby promote display device production efficiency.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. The display device is characterized by comprising a display panel, a flexible circuit board electrically connected with a binding area of the display panel and a back plate positioned at the back of the display panel; the binding area is provided with an alignment mark, and the alignment mark is used for identifying the accuracy of the electric connection between the display panel binding area and the flexible circuit board; and a black shading layer is arranged on the position of the back plate corresponding to the alignment mark.
2. The display device according to claim 1, wherein the bonding region comprises an outer drain electrode group, the flexible circuit board comprises a connection electrode group, and the connection electrode group and the outer drain electrode group are pressed in an aligned mode; and the alignment mark is at least positioned at the blank of one side of the outer drain electrode group.
3. The display device according to claim 2, wherein dummy electrode groups are provided on both sides of the outer drain electrode group, and the alignment mark is provided on a surface of the dummy electrode group.
4. The display device according to claim 1, wherein the alignment marks are cross-shaped structures, and the material of the cross-shaped structures is molybdenum metal.
5. The display device according to claim 1, wherein the back sheet comprises a transparent PET base film and a transparent pressure sensitive adhesive layer on the transparent PET base film, the black light shielding layer is a complete structure, and the black light shielding layer is flush with the edge of the transparent PET base film;
the black shading layer is positioned on one side, far away from the transparent PET base film, of the transparent pressure sensitive adhesive layer; or, the black light shield layer is located transparent PET base film is kept away from transparent pressure sensitive adhesive layer one side, perhaps, the black light shield layer is located transparent PET base film with between the transparent pressure sensitive adhesive layer.
6. The display device according to claim 1, wherein the back sheet comprises a transparent PET base film and a transparent pressure sensitive adhesive layer on the transparent PET base film;
the alignment marks comprise a first alignment mark and a second alignment mark, the first alignment mark and the second alignment mark are located on two sides of the binding area, the back plate is provided with a first black shading layer corresponding to the first alignment mark, and the back plate is provided with a second black shading layer corresponding to the second alignment mark.
7. The display device according to claim 6, wherein a first partition area and a second partition area are respectively arranged on two sides of the transparent pressure sensitive adhesive layer, and the first black shading layer and the second black shading layer are respectively filled in the first partition area and the second partition area.
8. The display device according to claim 6, wherein a first slit and a second slit are provided between the transparent PET base film and the transparent pressure-sensitive adhesive layer, and the first black light-shielding layer and the second black light-shielding layer fill the first slit and the second slit, respectively.
9. The display device according to claim 1, wherein the back sheet comprises a transparent PET base film and the black light shielding layer on the transparent PET base film.
10. A method for identifying alignment marks of a binding area of a display device is characterized by comprising the following steps:
step S10, providing a display panel to be bound and a flexible circuit board, wherein the binding area of the display panel comprises an outer drain electrode group, the flexible circuit board comprises a connecting electrode group, and the blank side of the binding area is provided with an alignment mark;
step S20, after the connection electrodes and the outer drain electrode group are aligned and pressed, so that the flexible circuit board is bound on the binding region of the display panel, and then a photographing device is used to photograph the alignment mark position from the back of the display panel to obtain a micro-picture of the corresponding alignment mark, and the photographed micro-picture is compared with the micro-picture of the alignment mark in a standard state to identify the accuracy of the electrical connection between the binding region of the display panel and the flexible circuit board.
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| CN202111003672.4A CN113707019B (en) | 2021-08-30 | 2021-08-30 | Display device and alignment mark identification method of display device binding area |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114093274A (en) * | 2021-12-09 | 2022-02-25 | 武汉华星光电半导体显示技术有限公司 | Display device and display terminal |
| CN114120846A (en) * | 2021-12-13 | 2022-03-01 | 深圳市华星光电半导体显示技术有限公司 | Spliced display panel and mobile terminal |
| WO2024060085A1 (en) * | 2022-09-21 | 2024-03-28 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display device |
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| JP2004274081A (en) * | 2004-05-25 | 2004-09-30 | Sumitomo Bakelite Co Ltd | Method for registering flexible printed board, and apparatus for the method |
| KR20080034732A (en) * | 2006-10-17 | 2008-04-22 | 삼성에스디아이 주식회사 | Display device and the fabrication method thereof |
| CN104536181A (en) * | 2014-12-25 | 2015-04-22 | 昆山国显光电有限公司 | FOG process alignment method and system |
| CN108427216A (en) * | 2017-02-15 | 2018-08-21 | 京东方科技集团股份有限公司 | A kind of bound flag identification device and bound device |
| CN113287198A (en) * | 2019-12-20 | 2021-08-20 | 京东方科技集团股份有限公司 | Display panel and manufacturing method and alignment method thereof |
| CN111383537A (en) * | 2020-04-02 | 2020-07-07 | 上海天马有机发光显示技术有限公司 | Display panel and display device |
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| CN114093274A (en) * | 2021-12-09 | 2022-02-25 | 武汉华星光电半导体显示技术有限公司 | Display device and display terminal |
| CN114120846A (en) * | 2021-12-13 | 2022-03-01 | 深圳市华星光电半导体显示技术有限公司 | Spliced display panel and mobile terminal |
| CN114120846B (en) * | 2021-12-13 | 2023-11-28 | 深圳市华星光电半导体显示技术有限公司 | Spliced display panel and mobile terminal |
| WO2024060085A1 (en) * | 2022-09-21 | 2024-03-28 | 京东方科技集团股份有限公司 | Display panel and manufacturing method therefor, and display device |
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