CN112309268A - Display device and preparation method thereof - Google Patents
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- CN112309268A CN112309268A CN201910703632.7A CN201910703632A CN112309268A CN 112309268 A CN112309268 A CN 112309268A CN 201910703632 A CN201910703632 A CN 201910703632A CN 112309268 A CN112309268 A CN 112309268A
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- 239000002184 metal Substances 0.000 claims description 11
- 238000005553 drilling Methods 0.000 claims description 6
- 238000005520 cutting process Methods 0.000 claims description 4
- 238000001755 magnetron sputter deposition Methods 0.000 claims description 4
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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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- 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
- G09F9/302—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 characterised by the form or geometrical disposition of the individual elements
- G09F9/3026—Video wall, i.e. stackable semiconductor matrix display modules
Abstract
The invention provides a display device and a display device manufacturing method, which are used for solving the problems of large splicing seams and poor image quality of a display panel caused by external driving electrical connection in microLED splicing. The device of the invention comprises: the display panel and the flexible substrate are positioned on one side of the display panel, which is far away from the light emergent surface; the surface of the flexible substrate facing the display panel is provided with a conductive structure; a signal line and/or a data line are/is arranged on one side of the display panel, which is far away from the flexible substrate; the display panel comprises a plurality of sub-panels distributed in an array, wherein in the row direction and/or the column direction, in each two adjacent sub-panels: a plurality of conductive channels are arranged at the edge part of one sub-panel adjacent to the other sub-panel, conductive bodies are filled in the conductive channels, one end of each conductive body is connected with the conductive structure, and the other end of each conductive body is connected with the signal line and/or the data line; the sub-panels are not electrically connected through external driving, and are provided with a plurality of scanning and data circuits, so that the image quality of the display panel is improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display device and a preparation method of the display device.
Background
Micro LEDs (Micro-scale light emitting diodes) are considered to be an ideal form of future display technology due to their characteristics of high brightness, fast response, high stability, etc. Currently, Micro LEDs have only small-sized panels, which are based on CMOS (Complementary Metal Oxide Semiconductor), PCB (Printed Circuit Board) or TFT (Thin Film Transistor), and the large-sized panels can be realized by splicing based on PCB, but have low resolution, and the TFT driving technology is necessary to realize high-resolution Micro LED display.
At present, a panel displayed by an LED (Light Emitting Diode) based on a TFT is smaller than 5 inches, and a plurality of panels need to be spliced, a conventional splicing panel is arranged by 2 × 2 and 3 × 2 at present, a built-in data line and a scan line driving circuit are arranged on one side or two sides of the display panel, and are connected by a PFC (Power Factor Correction) outer pin, and a splicing seam can reach several millimeters due to control of two side edges of a TFT substrate and electrical connection between a signal line and a unit, and the splicing seam is large; with the improvement of definition, signals of an external drive IC (Integrated Circuit) are increased, the lead pitch of the corresponding allowable automatic tape bonding is small, and scanning and data circuits cannot be arranged on the middle panel, which affects the image quality of the display panel.
Disclosure of Invention
The invention provides a display device and a display device manufacturing method, which are used for solving the problems that in the prior art, splicing seams are large and the image quality of a display panel is poor due to the fact that micro LEDs are spliced through external driving electrical connection.
The specific technical scheme provided by the embodiment of the invention is applied to a display device comprising a micro LED display panel, and the specific scheme is as follows:
in a first aspect, an embodiment of the present invention provides a display device, including: the display panel and the flexible substrate are positioned on one side of the display panel, which is far away from the light emergent surface; wherein:
the surface of the flexible substrate facing the display panel is provided with a conductive structure;
a signal line and/or a data line are/is arranged on one side of the display panel, which is far away from the flexible substrate;
the display panel comprises a plurality of sub-panels distributed in an array, wherein in the row direction and/or the column direction, in each two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a plurality of conductive channels, the conductive channels are filled with conductive bodies, one end of each conductive body is connected with the conductive structure, and the other end of each conductive body is connected with the signal line and/or the data line.
In one possible implementation, in the row direction and/or the column direction, in each two adjacent sub-panels: the side of one sub-panel facing the other sub-panel is provided with a slot to form a conductive channel.
In one possible implementation, in the row direction and/or the column direction, in each two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a through hole to form a conductive channel.
In one possible implementation, the two ends of the conductor in the conductive channel are provided with elongated terminals, one of which is connected to the signal and/or data line and the other of which is connected to the conductive structure.
In one possible implementation, the sub-panel is a glass substrate.
The device is characterized in that in the sub-panels distributed in the array, along the row direction and/or the column direction, in each two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a plurality of conductive channels, conductive bodies are filled in the conductive channels, signal lines and/or data lines in the display device are connected with one ends of the conductive bodies, the other ends of the conductive bodies are connected with the conductive structures on the flexible panel, and the conductive structures on the flexible panel are also connected with the conductive bodies in the conductive channels arranged on the edge part of the other sub-panel adjacent to the sub-panel; therefore, in the sub-panels distributed in a plurality of arrays, the electric conductors in one sub-panel are connected with the electric conductors in the adjacent sub-panel through the electric conduction structures on the flexible substrate, signals and/or data are led to the electric conductors in the sub-panels through the corresponding signal lines and/or data lines, and then are led to the electric conduction structures on the flexible substrate through the electric conductors of the sub-panels, and then are led to the electric conductors in the adjacent sub-panels, so that the two adjacent sub-panels are spliced, and the splicing seams are reduced because external drive electric connection is not needed, and a plurality of electric conductors are arranged in each sub-panel, so that a plurality of scanning and data circuits can be arranged, and the image quality of the display panel is improved.
In a second aspect, an embodiment of the present invention provides a method for manufacturing a display device, including:
forming a conductive channel in the edge part of each sub-panel, which is adjacent to other sub-panels along the row direction and/or the column direction, and forming a conductive body in the conductive channel;
the sub-panels provided with the electric conductors are placed on a flexible substrate provided with the electric conduction structures in the display device in an array mode, so that in each two adjacent sub-panels along the row direction and/or along the column direction: one section of the conductor is connected with the conductive structure, and the other end of the conductor is connected with a signal line and/or a data line in the display device.
In one possible implementation, the conductive paths are through holes, the sub-panels are glass substrates, and when each sub-panel is used to form the conductive paths along the edge portions of the sub-panel adjacent to other sub-panels along the row direction and/or the column direction:
before annealing the glass substrate, drilling holes according to a set shape and/or size at the edge part of the glass substrate, and forming through holes at the edge part of the sub-panel.
In one possible implementation, the conductive channel is a slot, the sub-panels are glass substrates, and when each sub-panel is used for forming the conductive channel along the edge portion adjacent to the other sub-panels along the row direction and/or the column direction:
before annealing the glass substrate, drilling holes on the edge part of the glass substrate according to a set shape and/or size to form a through hole;
and cutting the redundant edges of the glass substrate along a line which passes through the central point and is vertical to the two sides of the glass substrate, and forming a slot on the side surface of the sub-panel.
In one possible implementation, the signal lines and/or the data lines in the display device are generated by:
and forming a metal layer or an ITO layer on the sub-panel provided with the conductor by a magnetron sputtering process to form a signal line and/or a data line.
The method comprises the steps of forming a conductive channel in a sub-panel, filling a conductive body in the conductive channel, further placing the sub-panel on a flexible substrate with a conductive structure, enabling the conductive body to be connected with the conductive structure on the flexible substrate, connecting the conductive body with a signal line and/or a data line in a display device, connecting the conductive body with the conductive body through the signal line and/or the data line, connecting the conductive body with the conductive structure, connecting the conductive structure with the conductive body of another sub-panel, connecting the conductive body of the other sub-panel with the signal line and/or the data line on the sub-panel, reducing a splicing gap without external driving electrical connection when the sub-panels are spliced, and arranging a plurality of conductive channels in the sub-panels, thereby forming a plurality of scanning and data circuits and improving the image quality of the display panel.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1A is a schematic diagram of a display panel assembly according to the prior art;
FIG. 1B is a schematic diagram of another prior art display panel assembly;
fig. 2A is a schematic view of a display device according to an embodiment of the invention;
FIG. 2B is a schematic diagram of another display device according to an embodiment of the present invention;
FIG. 3A is a cross-sectional view of a first display device according to an embodiment of the invention;
FIG. 3B is a cross-sectional view of a second display device according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for manufacturing a display device according to an embodiment of the invention;
FIG. 5 is a diagram illustrating a method for manufacturing a display device according to an embodiment of the present invention when the conductive vias are formed as trenches.
Detailed Description
The application scenario described in the embodiment of the present invention is for more clearly illustrating the technical solution of the embodiment of the present invention, and does not form a limitation on the technical solution provided in the embodiment of the present invention, and it can be known by a person skilled in the art that with the occurrence of a new application scenario, the technical solution provided in the embodiment of the present invention is also applicable to similar technical problems. In the description of the present invention, the term "plurality" means two or more unless otherwise specified.
In the display device of the LED display panel based on the TFT, the display panel is formed by splicing a plurality of panels, as shown in fig. 1A and fig. 1B, the display panel is an arrangement mode when two panels are spliced in the prior art, and meanwhile, one side or two sides of the panel are provided with built-in data lines and scanning drive circuits and are connected through outer pins; because the control of the two sides of the TFT substrate, the circuit connection between the signal lines and the units can reach several millimeters, the signal of the external drive IC is increased along with the improvement of the definition, the relative pin interval allowing the automatic tape bonding is smaller, the limit of the outer pin interval is reached, and the scanning and data circuits cannot be arranged on the middle panel, thereby affecting the image quality of the display panel.
Based on the above, the present invention provides a display device, which includes a display panel and a flexible substrate located on a side of the display panel away from a light exit surface; the display panel is formed by splicing a plurality of micro LED sub-panels, and a conductive structure is arranged on the surface of the flexible substrate facing the display panel; one side that display panel deviates from the flexible substrate is provided with signal line and/or data line, and display panel includes the sub-panel (micro LED sub-panel) of a plurality of array distributions, among the sub-panel of a plurality of array distributions, along row direction and/or column direction, in every two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a plurality of conductive channels, the conductive channels are filled with conductive bodies, one end of each conductive body is connected with the conductive structure, and the other end of each conductive body is connected with the signal line and/or the data line.
In practical application, signals and/or data are transmitted to the electric conductors of the sub-panels through corresponding signal lines and/or data lines, the electric conductors are connected with the electric conduction structures, the electric conduction structures are also connected with the electric conductors of the other sub-panel, therefore, the signals and/or the data are connected with each adjacent sub-panel through the electric conductors and the electric conduction structures, the sub-panels are not spliced in an external driving electric connection mode, splicing gaps between the panels are reduced, a plurality of electric conduction channels are arranged in each sub-panel, and the electric conductors are arranged in the plurality of electric conduction channels, therefore, a plurality of scanning and data circuits can be arranged in one sub-panel according to the arranged electric conductors, and the image quality of the display panel is improved.
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 2A and 2B, a structure diagram of a display device according to an embodiment of the present invention includes: the display panel is positioned on the flexible substrate on one side of the display panel, which is far away from the light emergent surface; wherein:
the surface of the flexible substrate facing the display panel is provided with a conductive structure 30;
a signal line and/or a data line 40 is/are arranged on one side of the display panel, which is far away from the flexible substrate;
the display panel comprises a plurality of sub-panels 101 distributed in an array, wherein along a row direction and/or a column direction, in each two adjacent sub-panels 101: a plurality of conductive channels are formed in the edge portion of one sub-panel 101 adjacent to the other sub-panel 101, the conductive channels are filled with conductive bodies 104, one end of each conductive body 104 is connected to the conductive structure 30, and the other end is connected to the signal line and/or the data line.
The device is characterized in that in the sub-panels distributed in the array, along the row direction and/or the column direction, in each two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a plurality of conductive channels, conductive bodies are filled in the conductive channels, signal lines and/or data lines in the display device are connected with one ends of the conductive bodies, the other ends of the conductive bodies are connected with the conductive structures on the flexible panel, and the conductive structures on the flexible panel are also connected with the conductive bodies in the conductive channels arranged on the edge part of the other sub-panel adjacent to the sub-panel; therefore, in the sub-panels distributed in an array, the electric conductors in one sub-panel are connected with the electric conductors in the adjacent sub-panel through the electric conduction structures on the flexible substrate, signals and/or data are led to the electric conductors in the sub-panels through the corresponding signal lines and/or data lines, are led to the electric conduction structures on the flexible substrate through the electric conductors of the sub-panels and then are led to the electric conductors in the adjacent sub-panels, the two adjacent sub-panels are spliced, and due to the fact that the splicing gaps are reduced in a mode of not electrically connecting through external driving, and the plurality of electric conductors are arranged in each sub-panel, a plurality of scanning and data circuits can be arranged, and the image quality of the display panel is improved.
In an embodiment of the present invention, the conductive structure disposed on the surface of the flexible substrate facing the display panel includes one or a combination of the following: a flexible conductive cable, a metal layer, an ITO (Indium Tin Oxides) layer;
the signal lines and/or the data lines are formed by generating a metal layer or an ITO layer with the thickness of about 300nm on one side of the display panel, which is far away from the flexible substrate, through a magnetron sputtering technology, then coating positive glue on the metal layer or the ITO layer, and adopting a Photo aligner exposure technology.
In the embodiment of the present invention, the conductive channel may be a through hole, or the conductive channel is a slot;
when the conductive channel is a through hole, along the row direction and/or the column direction, in each two adjacent sub-panels: the edge portion of one sub-panel adjacent to the other sub-panel is provided with a through hole to form the conductive channel, and the edge portion of the sub-panel is located inside the sub-panel at this time, as shown in fig. 2A;
when the conductive channel is a slot, in the row direction and/or the column direction, in each two adjacent sub-panels: the side of one sub-panel facing the other sub-panel is provided with a slot to form the conductive channel, and the edge of the sub-panel is located on the side of the sub-panel, as shown in fig. 2B.
In an embodiment of the present invention, the conductive body filled in the conductive channel includes: metal elements, alloys, composite metals, and the like.
In the embodiment of the invention, the sub-panel is a glass substrate.
In the embodiment of the invention, when one end of the conductor in the conductive channel is connected with the signal line and/or the data line and the other end of the conductor is connected with the conductive channel, the conductor is connected with the signal line and/or the data line and the conductive structure through the extension terminals arranged at the two ends of the conductor.
As shown in fig. 3A and fig. 3B, the extension terminals at the two ends of the conductor have one end connected to the signal line and/or the data line and the other end connected to the conductive structure, so as to ensure that the signal lines on the two sub-panels are connected through the extension terminals at the two ends of the conductor, and at this time, the sub-panels are spliced.
Based on the same inventive concept, the embodiment of the invention also provides a preparation method of the display device.
As shown in fig. 4, a schematic flow chart of a manufacturing method of a display device according to an embodiment of the present invention includes the following steps:
In the method, a plurality of conductive channels are formed at the edge part of each sub-panel, which is used for being adjacent to other sub-panels along the row direction and/or the column direction, and conductive bodies are formed in the conductive channels; the sub-panels provided with the electric conductors are placed on a flexible substrate provided with the electric conduction structures in the display device in an array mode, so that in each two adjacent sub-panels along the row direction and/or along the column direction: one section of the conductor is connected with the conductive structure, and the other end of the conductor is connected with a signal line and/or a data line in the display device.
The method comprises the steps of forming a conductive channel in a sub-panel, filling a conductive body in the conductive channel, further placing the sub-panel on a flexible substrate with a conductive structure, enabling the conductive body to be connected with the conductive structure on the flexible substrate, connecting the conductive body with a signal line and/or a data line in a display device, connecting the conductive body with the conductive body through the signal line and/or the data line, connecting the conductive body with the conductive structure, connecting the conductive structure with the conductive body of another sub-panel, connecting the conductive body of the other sub-panel with the signal line and/or the data line on the sub-panel, reducing a splicing gap without external driving electrical connection when the sub-panels are spliced, and arranging a plurality of conductive channels in the sub-panels, thereby forming a plurality of scanning and data circuits and improving the image quality of the display panel.
In an embodiment of the present invention, the conductive structure includes one or a combination of the following: a flexible conductive cable, a metal layer, an ITO (Indium Tin Oxides) layer;
the signal lines and/or the data lines are formed by generating a metal layer or an ITO layer with the thickness of about 300nm on one side of the display panel, which is far away from the flexible substrate, through a magnetron sputtering technology, then coating positive glue on the metal layer or the ITO layer and adopting a Photo aligner exposure technology;
the conductive channel can be a through hole, or the conductive channel is a slot;
the sub-panel is a glass substrate.
In the embodiment of the present invention, when the conductive path is a through hole, the conductive path is formed by:
and before the glass substrate is annealed, drilling holes according to a set shape and/or size at the edge part of the glass substrate, and forming the through holes at the edge part of the sub-panel.
When the conductive channel is a slot, the conductive channel is formed by the following method:
before the glass substrate is annealed, drilling holes according to a set shape and/or size at the edge part of the glass substrate to form a through hole;
and cutting the redundant edges of the glass substrate along a line which passes through the central point and is vertical to the two sides of the glass substrate, and forming a slot on the side surface of the sub-panel.
As shown in fig. 5, a schematic diagram of a micro led display panel is generated when a conductive channel is formed in a sub-panel and the conductive channel is a slot in the embodiment of the present invention;
in the embodiment of the present invention, when the conductive channel is a through hole, it is preferable to provide a metal connection post with a diameter of about 20-50 μm on the sub-panel, and provide an extension terminal at both ends for connecting with a signal line and/or a data line and connecting with a conductive structure;
thus, when the conductive vias are slots, the slots are formed by cutting a semicircular glass substrate from metal connection posts having a diameter of about 20-50 μm, with a radius of about 20 μm.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (9)
1. A display device, characterized in that the display device comprises: the display panel comprises a display panel and a flexible substrate positioned on one side of the display panel, which is far away from the light emergent surface; wherein:
a conductive structure is arranged on the surface of the flexible substrate facing the display panel;
a signal line and/or a data line are/is arranged on one side of the display panel, which is far away from the flexible substrate;
the display panel comprises a plurality of sub-panels distributed in an array, wherein in the row direction and/or the column direction, in each two adjacent sub-panels: the edge part of one sub-panel adjacent to the other sub-panel is provided with a plurality of conductive channels, the conductive channels are filled with conductive bodies, one ends of the conductive bodies are connected with the conductive structures, and the other ends of the conductive bodies are connected with the signal lines and/or the data lines.
2. The apparatus of claim 1, wherein in each two adjacent sub-panels, in a row direction and/or a column direction: and a side surface of one sub-panel facing to the other sub-panel is provided with a slot to form the conductive channel.
3. The apparatus of claim 1, wherein in each two adjacent sub-panels, in a row direction and/or a column direction: the edge part of one sub-panel adjacent to the other sub-panel is provided with a through hole to form the conductive channel.
4. The apparatus of claim 1, wherein the electrical conductors in the conductive paths have elongate terminals at opposite ends, one of the elongate terminals being connected to the signal and/or data lines and the other of the elongate terminals being connected to the conductive structure.
5. The device of any of claims 1 to 3, wherein the sub-panel is a glass substrate.
6. A method of manufacturing a display device, the method comprising:
forming a plurality of conductive channels in the edge part of each sub-panel, which is adjacent to other sub-panels along the row direction and/or the column direction, and forming a conductive body in each conductive channel;
the sub-panels provided with the electric conductors are placed on a flexible substrate provided with the electric conduction structures in the display device in an array mode, so that in each two adjacent sub-panels along the row direction and/or along the column direction: one section of the conductor is connected with the conductive structure, and the other end of the conductor is connected with a signal line and/or a data line in the display device.
7. The method of claim 6, wherein the conductive vias are through holes, the sub-panels are glass substrates, and forming the conductive vias in edge portions of each sub-panel adjacent to other sub-panels in a row direction and/or a column direction comprises:
and before the glass substrate is annealed, drilling holes according to a set shape and/or size at the edge part of the glass substrate, and forming the through holes at the edge part of the sub-panel.
8. The method of claim 6, wherein the conductive vias are slots, the sub-panels are glass substrates, and forming the conductive vias in edge portions of each sub-panel adjacent to other sub-panels in a row direction and/or a column direction comprises:
before the glass substrate is annealed, drilling holes according to a set shape and/or size at the edge part of the glass substrate to form a through hole;
and cutting the redundant edges of the glass substrate along a line which passes through the central point and is vertical to the two sides of the glass substrate, and forming a slot on the side surface of the sub-panel.
9. A method as claimed in claim 6, characterized in that the signal lines and/or the data lines in the display device are generated by:
and forming a metal layer or an ITO layer on the sub-panel provided with the conductor by a magnetron sputtering process to form the signal line and/or the data line.
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| CN201910703632.7A CN112309268A (en) | 2019-07-31 | 2019-07-31 | Display device and preparation method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114141154A (en) * | 2021-12-06 | 2022-03-04 | Tcl华星光电技术有限公司 | Tiled display device |
| CN114373396A (en) * | 2022-02-10 | 2022-04-19 | 惠州华星光电显示有限公司 | Splicing display panel and splicing display device |
| WO2022198716A1 (en) * | 2021-03-22 | 2022-09-29 | Tcl华星光电技术有限公司 | Spliced lamp panel and display apparatus |
| US11841569B2 (en) | 2021-12-06 | 2023-12-12 | Tcl China Star Optoelectronics Technology Co., Ltd. | Splicing display device |
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| CN114373396B (en) * | 2022-02-10 | 2023-10-17 | 惠州华星光电显示有限公司 | Spliced display panel and spliced display device |
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