CN112614863A - Micro light-emitting diode display panel, dead pixel repairing method and display - Google Patents
Micro light-emitting diode display panel, dead pixel repairing method and display Download PDFInfo
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- CN112614863A CN112614863A CN202011480147.7A CN202011480147A CN112614863A CN 112614863 A CN112614863 A CN 112614863A CN 202011480147 A CN202011480147 A CN 202011480147A CN 112614863 A CN112614863 A CN 112614863A
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H29/00—Integrated devices, or assemblies of multiple devices, comprising at least one light-emitting semiconductor element covered by group H10H20/00
- H10H29/10—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00
- H10H29/14—Integrated devices comprising at least one light-emitting semiconductor component covered by group H10H20/00 comprising multiple light-emitting semiconductor components
- H10H29/142—Two-dimensional arrangements, e.g. asymmetric LED layout
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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
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67288—Monitoring of warpage, curvature, damage, defects or the like
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L22/00—Testing or measuring during manufacture or treatment; Reliability measurements, i.e. testing of parts without further processing to modify the parts as such; Structural arrangements therefor
- H01L22/20—Sequence of activities consisting of a plurality of measurements, corrections, marking or sorting steps
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/80—Constructional details
- H10H20/85—Packages
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10H—INORGANIC LIGHT-EMITTING SEMICONDUCTOR DEVICES HAVING POTENTIAL BARRIERS
- H10H20/00—Individual inorganic light-emitting semiconductor devices having potential barriers, e.g. light-emitting diodes [LED]
- H10H20/01—Manufacture or treatment
- H10H20/036—Manufacture or treatment of packages
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Abstract
The invention provides a micro light-emitting diode display panel, a dead pixel repairing method and a display, wherein the micro light-emitting diode display panel comprises: the pixel structure comprises a substrate, wherein a plurality of pixel units are arranged on the substrate, and a main pixel area and a backup pixel area are arranged in each pixel unit; the backup pixel area is internally provided with a backup micro light-emitting diode which is a blue micro light-emitting diode.
Description
Technical Field
The invention belongs to the technical field of display, and particularly relates to a micro light-emitting diode display panel and a display.
Background
The Micro light emitting diode (Micro LED, mu LED, abbreviated as Micro LED) display is a display which realizes image display by taking a high-density Micro-sized LED array integrated on a substrate as display pixels, and like a large-sized outdoor LED display screen, each pixel can be addressed and independently driven to be lightened, can be regarded as a Micro version of the outdoor LED display screen, and reduces the distance between pixel points from a millimeter level to a micron level. The micro LED display belongs to a self-luminous display, and compared with an OLED display, the micro LED display has the advantages of better material stability, longer service life, no image branding and the like, and has greater application potential.
When the micro LED display panel is prepared, pixel array processing can be realized by transferring and welding the LED chip arrays on the driving backboard in batches. However, due to the limitation of the micro LED manufacturing process, the micro LED array transferred to the driving backplane usually includes micro LEDs with abnormal photoelectric performance. In the prior art, after a dead pixel is detected, a dead pixel is generally repaired by adopting a repairing method of dead pixel elimination and fixed point single placement, that is, each dead pixel is eliminated, and a new Micro-LED chip is placed at the dead pixel. However, this repair method requires multiple times of removing the defective pixel and multiple times of placing a new Micro-LED chip, and the repair efficiency is very low. In addition, the repairing process is easy to generate interference and other problems to the surrounding normal micro LED.
Disclosure of Invention
The invention provides a micro light-emitting diode display panel and a micro light-emitting diode display capable of repairing abnormal micro LEDs in pixel units, aiming at the problem of how to repair the abnormal micro LEDs in the pixel units of the micro light-emitting diode display panel and improve the product yield of the micro light-emitting diode display panel.
The technical scheme of the invention provides a micro light-emitting diode display panel, which comprises: the pixel structure comprises a substrate, wherein a plurality of pixel units are arranged on the substrate, and a main pixel area and a backup pixel area are arranged in each pixel unit; the backup pixel area is internally provided with a backup micro light-emitting diode which is a blue micro light-emitting diode.
As an optional technical solution, a first micro light emitting diode, a second micro light emitting diode and a third micro light emitting diode are disposed in the main pixel region.
As a selectable technical solution, the first micro light emitting diode, the second micro light emitting diode and the third micro light emitting diode are blue light micro light emitting diodes, respectively.
As an optional technical solution, a first color conversion layer and a second color conversion layer are respectively disposed on any two blue micro light emitting diodes of the backup micro light emitting diode, the first micro light emitting diode, the second micro light emitting diode and the third micro light emitting diode, wherein the first color conversion layer is a red quantum dot layer, and the second color conversion layer is a blue quantum dot layer.
As an optional technical solution, the first micro light emitting diode, the second micro light emitting diode and the third micro light emitting diode are respectively a blue light micro light emitting diode, a red light micro light emitting diode or a green light micro light emitting diode.
As an optional technical solution, the substrate is a TFT driving backplane.
As an optional technical solution, the TFT driving backplane includes a backup driving circuit, and the backup driving circuit is electrically connected to the backup micro light emitting diode.
The invention also provides a display which comprises the micro light-emitting diode display panel.
The invention also provides a method for repairing the dead pixel of the micro light-emitting diode display panel, which comprises the following steps:
s1, providing a substrate, wherein the substrate is provided with a plurality of pixel units, and each pixel unit comprises a main pixel area and a backup pixel area;
s2, transferring huge quantities of the first, second and third micro-leds to the main pixel area, and transferring huge quantities of the backup micro-leds to the backup pixel area;
s3, detecting all the first micro light-emitting diodes, the second micro light-emitting diodes and the third micro light-emitting diodes on the substrate, and finding out the micro light-emitting diodes with dead spots; and
s4, controlling the open circuit of the main switch on the substrate electrically connected with the micro light-emitting diode of the dead point, and controlling the backup switch on the substrate electrically connected with the backup light-emitting diode;
wherein, the backup micro light-emitting diode is a blue light micro light-emitting diode.
As an optional technical solution, the first micro light emitting diode, the second micro light emitting diode and the third micro light emitting diode are blue light micro light emitting diodes respectively; or the first micro light-emitting diode, the second micro light-emitting diode and the third micro light-emitting diode are respectively a blue light micro light-emitting diode, a red light micro light-emitting diode or a green light micro light-emitting diode.
Compared with the prior art, the invention provides a micro light-emitting diode display panel, a dead pixel repairing method and a display, wherein a backup blue light micro light-emitting diode is additionally arranged in a backup pixel area of each pixel unit on a substrate to control the backup micro light-emitting diode to repair a dead pixel micro light-emitting diode possibly existing in the pixel unit, so that the repair in the existing micro LED display panel preparation process is reduced, the high repair cost is avoided, and the preparation cost of the micro LED display panel is reduced.
The invention is described in detail below with reference to the drawings and specific examples, but the invention is not limited thereto.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic view of a micro led display panel according to an embodiment of the invention.
Fig. 2 is an enlarged schematic view of the pixel unit in fig. 1.
Fig. 3 is a schematic diagram of the pixel unit in fig. 2 after being colorized.
Fig. 4 and 5 are schematic diagrams illustrating a partial defective pixel repairing process of the micro led display panel in fig. 1.
Fig. 6 is an enlarged schematic view of a pixel unit of a micro led display panel according to another embodiment of the invention.
Fig. 7 and 8 are schematic views illustrating a partial defective pixel repairing process of a micro led display panel according to another embodiment of the present invention.
Fig. 9 is a flowchart of a method for repairing a defective pixel of a micro led display panel according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to embodiments and accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in fig. 1 and fig. 2, the present invention provides a micro led display panel 100, which includes a substrate 101, a plurality of pixel units 102 are disposed on the substrate 101, each pixel unit 102 includes a main pixel region 1021 and a backup pixel region 1022; the backup pixel region 1022 has a backup micro led 10, and the backup micro led 10 is a blue micro led.
In the invention, the blue micro light-emitting diode is additionally arranged in the backup pixel area of the pixel unit, so that the purpose of repairing the dead-spot micro light-emitting diode in the pixel unit at low cost is achieved.
As shown in fig. 2, a first micro light emitting diode 21, a second micro light emitting diode 22 and a third micro light emitting diode 23 are disposed in a main pixel area 1021 of the pixel unit 102; preferably, the first micro light emitting diode 21, the second micro light emitting diode 22 and the third micro light emitting diode 23 are blue micro light emitting diodes.
The substrate 10 is, for example, a TFT driving backplane, and includes a main driving circuit for driving the main pixel area 1021 and a backup driving circuit for driving the backup pixel area 1022, preferably, the main driving circuit includes a plurality of main switches, the backup driving circuit includes a backup switch, and the plurality of main switches are electrically connected to the first micro light emitting diodes 21, the second micro light emitting diodes 22, and the third micro light emitting diodes 23.
As shown in fig. 2 and 3, when the first micro light emitting diode 21, the second micro light emitting diode 22 and the third micro light emitting diode 23 are all blue micro light emitting diodes, in order to realize the colorized display of the micro light emitting diode display panel 100, color conversion layers are disposed on two micro light emitting diodes of the first micro light emitting diode 21, the second micro light emitting diode 22 and the third micro light emitting diode 23, for example, a first color conversion layer 221 is disposed on the second micro light emitting diode 22, and a second color conversion layer 231 is disposed on the third micro light emitting diode 23, wherein the first color conversion layer 221 is a red quantum dot layer, and the second color conversion layer 231 is a green quantum dot layer.
The blue light emitted by the blue micro-leds is converted into corresponding red and green light by the red and green quantum dot layers, and then is displayed in color together with the blue light of other micro-leds in the pixel unit 102.
As shown in fig. 1, fig. 2, fig. 4 and fig. 5, the process of repairing the dead pixel of the pixel units 102 of the micro led display panel 100 includes:
the control substrate 101, namely, the TFT driving back plate is powered on to light the micro light emitting diodes in the main pixel area 1021 of all the pixel units 102, and obtain dead pixels or abnormal micro light emitting diodes in all the main pixel area 1021; if the dead-point micro light emitting diode in the main pixel area 1021 is judged to be the first micro light emitting diode 21 which is a blue light micro light emitting diode, the main switch corresponding to the first micro light emitting diode 21 is controlled to be in an open circuit, the backup micro light emitting diode 10 in the backup pixel area 1022 is started, and the backup switch is controlled to be in a closed circuit; if the dead micro led in the main pixel area 1021 is determined to be the second micro led 22, the main switch corresponding to the second micro led 22 is controlled to be turned off, and the backup micro led 10 in the backup pixel area 1022 is turned on, the backup switch is turned on, and the first color conversion layer 221, such as a red quantum dot layer, is formed on the backup micro led 10; if the dead micro led in the main pixel area 1021 is determined to be the third micro led 23, the main switch corresponding to the third micro led 23 is controlled to be turned off, the backup micro led 10 in the backup pixel area 1022 is turned on, the backup switch is turned on, and the second color conversion layer 231, for example, a green quantum dot layer, is formed on the backup micro led 10.
As shown in fig. 6 to 8, in another embodiment of the present invention, a micro led display panel 200 is provided, which is different from the micro led display panel 100 in that in a plurality of pixel units 202 of the micro led display panel 200, a first micro led 220, a second micro led 230 and a third micro led 240 are disposed in a main pixel region 2021 of each pixel unit 202; preferably, the first micro light emitting diode 220, the second micro light emitting diode 230 and the third micro light emitting diode 240 are blue micro light emitting diodes. The backup pixel region 2022 of each pixel unit 202 has a backup micro led 210, which is a blue micro led.
As shown in fig. 7 and 8, the process of repairing the dead pixel of the plurality of pixel units 202 of the micro led display panel 200 includes:
the control substrate, that is, the TFT driving backplane is powered on to light the micro leds in the main pixel area 2021 of all the pixel units 202, so as to obtain dead pixels or abnormal micro leds in all the main pixel areas 2021; if the micro light-emitting diode with the dead point in the main pixel area 2021 is judged to be the first micro light-emitting diode 220 which is a blue light micro light-emitting diode, the main switch corresponding to the first micro light-emitting diode 220 is controlled to be in an open circuit, the backup micro light-emitting diode 210 in the backup pixel area 2022 is started, and the backup switch is controlled to be in a closed circuit; if the micro led with a dead pixel in the main pixel region 2021 is determined to be the second micro led 230, the main switch corresponding to the second micro led 230 is controlled to be in an open circuit, the backup micro led 210 in the backup pixel region 2022 is started, the backup switch is in a closed circuit, and a first color conversion layer 2301, such as a red quantum dot layer, is formed on the backup micro led 210; if the micro led with a dead pixel in the main pixel area 2021 is determined to be the third micro led 240, the main switch corresponding to the third micro led 240 is controlled to be turned off, the backup micro led 210 in the backup pixel area 2022 is turned on, the backup switch is turned on, and the second color conversion layer 2401, such as a green quantum dot layer, is formed on the backup micro led 210.
In other words, in the micro LED display panels 100 and 200 provided by the present invention, two blue micro LEDs are disposed in each pixel unit 102 and 202 on the substrate, and one of the blue micro LEDs is controlled to serve as a backup micro LED to repair a defective micro LED possibly existing in the pixel unit, so as to reduce the repair in the existing micro LED display panel manufacturing process, avoid the high repair cost, and reduce the manufacturing cost of the micro LED display panel.
In addition, the invention also provides a display, which comprises one of the micro light emitting diode display panels 100 and 200.
As shown in fig. 9, the present invention further provides a method for repairing a defective pixel of a micro led display panel, which includes:
s1, providing a substrate, wherein the substrate is provided with a plurality of pixel units, and each pixel unit comprises a main pixel area and a backup pixel area;
s2, transferring huge quantities of the first, second and third micro-leds to the main pixel area, and transferring huge quantities of the backup micro-leds to the backup pixel area;
s3, detecting all the first micro light-emitting diodes, the second micro light-emitting diodes and the third micro light-emitting diodes on the substrate, and finding out the micro light-emitting diodes with dead spots; and
s4, controlling the open circuit of the main switch on the substrate electrically connected with the micro light-emitting diode of the dead point, and controlling the backup switch on the substrate electrically connected with the backup light-emitting diode;
wherein, the backup micro light-emitting diode is a blue light micro light-emitting diode.
In this embodiment, if the first micro light emitting diode, the second micro light emitting diode and the third micro light emitting diode are blue light micro light emitting diodes, a huge amount of the first micro light emitting diode, the second micro light emitting diode, the third micro light emitting diode and the backup micro light emitting diode are simultaneously transferred to the main pixel area and the backup pixel area of the pixel unit.
If the first micro light-emitting diode, the second micro light-emitting diode and the third micro light-emitting diode are respectively a blue light micro light-emitting diode, a red light micro light-emitting diode or a green light micro light-emitting diode, the first micro light-emitting diode and the backup micro light-emitting diode are simultaneously transferred into a main pixel area and a backup pixel area of a pixel unit, and then the second micro light-emitting diode and the third micro light-emitting diode are respectively transferred into the main pixel area of the substrate in times.
In summary, the invention provides a micro-LED display panel, a dead pixel repairing method, and a display, in which a backup blue micro-LED is added in a backup pixel region of each pixel unit on a substrate to control the backup micro-LED to repair a dead micro-LED possibly existing in the pixel unit, thereby reducing repair in the existing micro-LED display panel preparation process, avoiding high repair cost, and reducing the preparation cost of the micro-LED display panel.
The present invention has been described in relation to the above embodiments, which are only exemplary of the implementation of the present invention. Furthermore, the technical features mentioned in the different embodiments of the present invention described above may be combined with each other as long as they do not conflict with each other. It is to be noted that the present invention may take various other embodiments, and that various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (10)
1. A micro light emitting diode display panel, comprising:
the pixel structure comprises a substrate, wherein a plurality of pixel units are arranged on the substrate, and a main pixel area and a backup pixel area are arranged in each pixel unit;
the backup pixel area is internally provided with a backup micro light-emitting diode which is a blue micro light-emitting diode.
2. The micro led display panel of claim 1, wherein the main pixel region has a first micro led, a second micro led and a third micro led.
3. The micro light-emitting diode display panel of claim 2, wherein the first micro light-emitting diode, the second micro light-emitting diode, and the third micro light-emitting diode are blue light micro light-emitting diodes, respectively.
4. The micro led display panel of claim 3, wherein a first color conversion layer and a second color conversion layer are respectively disposed on any two blue micro leds of the backup micro leds, the first micro leds, the second micro leds and the third micro leds, wherein the first color conversion layer is a red quantum dot layer and the second color conversion layer is a blue quantum dot layer.
5. The micro light-emitting diode display panel of claim 2, wherein the first, second and third micro light-emitting diodes are blue, red or green micro light-emitting diodes, respectively.
6. The micro led display panel of claim 1, wherein the substrate is a TFT driver backplane.
7. The micro led display panel of claim 6, wherein the TFT driver backplane comprises a backup driver circuit, the backup driver circuit electrically connected to the backup micro leds.
8. A display comprising a micro-led display panel according to any one of claims 1 to 7.
9. A dead pixel repairing method of a micro light emitting diode display panel is characterized by comprising the following steps:
s1, providing a substrate, wherein the substrate is provided with a plurality of pixel units, and each pixel unit comprises a main pixel area and a backup pixel area;
s2, transferring huge quantities of the first, second and third micro-leds to the main pixel area, and transferring huge quantities of the backup micro-leds to the backup pixel area;
s3, detecting all the first micro light-emitting diodes, the second micro light-emitting diodes and the third micro light-emitting diodes on the substrate, and finding out the micro light-emitting diodes with dead spots; and
s4, controlling the open circuit of the main switch on the substrate electrically connected with the micro light-emitting diode of the dead point, and controlling the backup switch on the substrate electrically connected with the backup light-emitting diode;
wherein, the backup micro light-emitting diode is a blue light micro light-emitting diode.
10. The method of repairing a dead pixel of claim 9, wherein the first micro light emitting diode, the second micro light emitting diode, and the third micro light emitting diode are blue light micro light emitting diodes, respectively; or the first micro light-emitting diode, the second micro light-emitting diode and the third micro light-emitting diode are respectively a blue light micro light-emitting diode, a red light micro light-emitting diode or a green light micro light-emitting diode.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011480147.7A CN112614863A (en) | 2020-12-15 | 2020-12-15 | Micro light-emitting diode display panel, dead pixel repairing method and display |
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| CN202011480147.7A CN112614863A (en) | 2020-12-15 | 2020-12-15 | Micro light-emitting diode display panel, dead pixel repairing method and display |
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| WO2024238878A1 (en) * | 2023-05-18 | 2024-11-21 | Applied Materials, Inc. | Repair methods for micro-led displays using intensity averaging |
| WO2024238583A1 (en) * | 2023-05-18 | 2024-11-21 | Applied Materials, Inc. | Structure for reducing impact of defects on display quality |
| WO2024238240A1 (en) * | 2023-05-18 | 2024-11-21 | Applied Materials, Inc. | Color-dependent defective pixel mitigation method |
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| WO2024238240A1 (en) * | 2023-05-18 | 2024-11-21 | Applied Materials, Inc. | Color-dependent defective pixel mitigation method |
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