CN113889033B - Display panel, manufacturing method thereof and display device - Google Patents
Display panel, manufacturing method thereof and display device Download PDFInfo
- Publication number
- CN113889033B CN113889033B CN202111234045.1A CN202111234045A CN113889033B CN 113889033 B CN113889033 B CN 113889033B CN 202111234045 A CN202111234045 A CN 202111234045A CN 113889033 B CN113889033 B CN 113889033B
- Authority
- CN
- China
- Prior art keywords
- light emitting
- emitting device
- voltage line
- switching circuit
- display panel
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
Abstract
The embodiment of the invention provides a display panel, a manufacturing method thereof and a display device. The display panel comprises normal light-emitting devices and redundant light-emitting devices, wherein one redundant light-emitting device corresponds to at least one normal light-emitting device; the display panel includes a pixel circuit including a first pixel circuit; the redundant light emitting device is connected with the first pixel circuit through the switching circuit; the switching circuit is used for realizing the conduction or the interruption of a path between the redundant light-emitting device and the first pixel circuit. The invention can compensate the normal luminescent device with defects, can improve the product yield and reduce the cost.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel, a manufacturing method thereof and a display device.
Background
In the conventional micro-LED (light-emitting diode) display technology, the micro-LED needs to be grown on a wafer and then transferred onto a driving substrate. The manufacturing of the micro LED has a certain yield, and each process has the yield in the transferring and assembling process of the micro LED, so that the final number of bad defects is huge, and the yield of products is low.
Disclosure of Invention
The embodiment of the invention provides a display panel, a manufacturing method thereof and a display device, which are used for improving the yield of products and reducing the cost.
In a first aspect, an embodiment of the present invention provides a display panel, including: normal light emitting devices and redundant light emitting devices, one redundant light emitting device corresponding to at least one normal light emitting device;
the display panel includes a pixel circuit including a first pixel circuit; the redundant light emitting device is connected with the first pixel circuit through the switching circuit;
the switching circuit is used for realizing the conduction or the disconnection of a path between the redundant light emitting device and the first pixel circuit.
In a second aspect, an embodiment of the invention provides a method for manufacturing a display panel,
in a third aspect, an embodiment of the present invention provides a display device including the display panel provided in any embodiment of the present invention.
The display panel, the manufacturing method thereof and the display device provided by the embodiment of the invention have the following beneficial effects: when the normal light-emitting device has defects, the switching circuit is configured, and when the switching circuit is used for realizing the conduction of a channel between the redundant light-emitting device and the first pixel circuit, the first pixel circuit can drive the redundant light-emitting device to emit light, and the redundant light-emitting device can replace the defective normal light-emitting device to serve as a sub-pixel for displaying. When the normal light emitting device has no defect, the switching circuit is configured, and the switching circuit is used for realizing the cut-off of the path between the redundant light emitting device and the first pixel circuit. The display panel provided by the embodiment of the invention can compensate the normal luminescent device with defects, can improve the product yield and reduce the cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without inventive labor.
FIG. 1 is a simplified diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a simplified diagram of another display panel according to an embodiment of the present invention;
FIG. 3 is a schematic view of another display panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of another display panel according to an embodiment of the present invention;
FIG. 5 is a schematic view of another display panel according to an embodiment of the present invention;
FIG. 6 is a simplified diagram of another display panel according to an embodiment of the present invention;
FIG. 7 is a flowchart illustrating a method for fabricating a display panel according to an embodiment of the present invention;
fig. 8 is a simplified schematic diagram of a circuit structure in a driving substrate according to an embodiment of the present invention;
fig. 9 is a schematic circuit diagram of a display panel after transferring a light emitting device to a driving substrate;
FIG. 10 is a schematic diagram of a circuit structure of the display panel after step S103;
FIG. 11 is a simplified diagram of another display panel according to an embodiment of the present invention;
fig. 12 is a schematic view of a display device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the description of the invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
The embodiment of the invention provides a display panel, wherein light-emitting devices in the display panel comprise a normal light-emitting device and a redundant light-emitting device, wherein the normal light-emitting device is a preset device which is used as a sub-pixel to emit light for display. After the light emitting device is transferred onto the driving substrate, a defect of the light emitting device is detected. When the normal light-emitting device has a display defect, the switching circuit is configured, and the switching circuit is used for realizing the conduction of a passage between the redundant light-emitting device and the pixel circuit so as to replace the light-emitting device with the defect by using the redundant light-emitting device; when the normal light-emitting device has no defect, the switching circuit is configured, and the switching circuit is used for realizing the cut-off of the path between the redundant light-emitting device and the pixel circuit, so that the redundant light-emitting device can not emit light when the display panel displays normally. Therefore, the product yield can be improved, and the cost can be reduced. The present invention will be explained below in specific examples.
In the display panel provided by the embodiment of the invention, one redundant light-emitting device corresponds to at least one normal light-emitting device; in some embodiments, one redundant light emitting device corresponds to one normal light emitting device, and when the normal light emitting device has a defect, the corresponding redundant light emitting device is used as a sub-pixel to emit light. In some embodiments, one redundant light emitting device corresponds to two or more normal light emitting devices, and when one of the normal light emitting devices has a defect, the redundant light emitting device is used to emit light to replace the defective normal light emitting device.
The embodiment of the invention does not limit the setting position and the number of the redundant light-emitting devices in the display panel. In some embodiments, the normal light emitting devices in the display panel each correspond to a redundant light emitting device. In other embodiments, the redundant light emitting devices are disposed only in a partial display region of the display panel, that is, only some of the normal light emitting devices correspond to the redundant light emitting devices.
The light-emitting device in the display panel provided by the embodiment of the invention can be a micro light-emitting diode or a mini light-emitting diode.
Fig. 1 is a simplified schematic diagram of a display panel according to an embodiment of the present invention, and fig. 1 illustrates a normal light emitting device 10 corresponding to a redundant light emitting device 20 in a partial display area of the display panel. The display panel further includes a pixel circuit 30, and the pixel circuit 30 is used to drive the light emitting device to emit light. Wherein the pixel circuit 30 includes a first pixel circuit 31; the redundant light emitting device 20 is connected to the first pixel circuit 31 through the switching circuit 40; the switching circuit 40 is used to make or break a path between the redundant light emitting device 20 and the first pixel circuit 31. That is, whether the path between the redundant light emitting device 20 and the first pixel circuit 31 is turned on or off is determined by the switching circuit 40. Each of the redundant light emitting devices 20 is provided with a switching circuit 40 correspondingly.
Each normal light emitting device 10 is provided with a pixel circuit 30 corresponding thereto in the display panel. The normal light emitting device 10 is illustrated in fig. 1 electrically connected to the first pixel circuit 31. That is, the normal light emitting device 10 and the redundant light emitting device 20 corresponding thereto are connected to the same first pixel circuit 31. The redundant light emitting device 20 and the normal light emitting device 10 share the pixel circuit, and thus, the redundant light emitting device 20 does not need to be additionally provided with the pixel circuit, so that the wiring space of the pixel circuit in the display panel can be saved, and the wiring mode of the pixel circuit can be simplified. In addition, fig. 1 illustrates a first pixel circuit 31 connected to a normal light emitting device 10. In some embodiments, one first pixel circuit 31 connects two or more numbers of normal light emitting devices 10, that is, one pixel circuit simultaneously drives two or more numbers of normal light emitting devices 10.
It should be noted that, in the embodiment of the present invention, the switching circuit 40 implements the path cut between the redundant light emitting device 20 and the first pixel circuit 31, which means that the first pixel circuit 31 cannot drive the redundant light emitting device 20 to emit light, and at this time, the first pixel circuit 31 can generate the driving current, but the driving current generated by the first pixel circuit 31 cannot be supplied to the redundant light emitting device 20 to drive the redundant light emitting device 20 to emit light after being applied by the switching circuit 40.
When the normal light emitting device 20 has a defect, the switching circuit 40 is configured, and when the switching circuit 40 is used to turn on the path between the redundant light emitting device 20 and the first pixel circuit 31, the first pixel circuit 31 can drive the redundant light emitting device 20 to emit light, and the redundant light emitting device 20 can replace the defective normal light emitting device 20 to be displayed as a sub-pixel. When the normal light emitting device 20 is not defective, the switching circuit 40 is configured, and the path cutoff between the redundant light emitting device 20 and the first pixel circuit 31 is achieved by the switching circuit 40. The display panel provided by the embodiment of the invention can compensate the normal light-emitting device with defects, can improve the yield of products and reduce the cost.
In some embodiments, if none of the normal light emitting devices 10 in the display panel is defective, none of the redundant light emitting devices 20 is enabled, the redundant light emitting devices 20 are connected to the first pixel circuits 31 through the switching circuits 40, and the switching circuits 40 are configured to achieve path cutoff between the redundant light emitting devices 20 and the first pixel circuits 31.
In other embodiments, if a portion of the normal light emitting devices 10 in the display panel is defective, the redundant light emitting devices corresponding to the portion of the normal light emitting devices 10 are enabled. The partial switching circuit 40 is configured to achieve a path conduction between the redundant light emitting device 20 and the first pixel circuit 31; the remainder converting circuit 40 is configured to realize a path cutoff between the redundant light emitting device 20 and the first pixel circuit 31.
It should be noted that fig. 1 is only for illustrating the connection manner between the redundant light emitting device 20 and the first pixel circuit 31, and the arrangement manner of the light emitting devices and the pixel circuits in the display panel is not limited. The display panel provided by the embodiment of the present invention includes a driving substrate, where the normal light emitting device 10 and the redundant light emitting device 20 are both located on the same side of the driving substrate, and the driving substrate is provided with a pixel circuit 30.
In addition, the structure of the pixel circuit 30 is not limited in the embodiment of the present invention, and the pixel circuit 30 may be any circuit structure that can drive a light emitting device to emit light in the prior art. The pixel circuit 30 includes at least a drive transistor and a storage capacitor. In one embodiment, the pixel circuit 30 is a 2T1C circuit, i.e., includes two transistors and a capacitor. In another embodiment, the pixel circuit 30 is a 7T1C circuit, i.e., includes seven transistors and a capacitor.
Fig. 2 is a simplified schematic diagram of another display panel according to an embodiment of the present invention. As shown IN fig. 2, the switching circuit 40 includes a first input terminal IN1, a second input terminal IN2, and an output terminal OUT.
The display panel further comprises at least one voltage line group Z, wherein the voltage line group Z comprises a first voltage line X1 and a second voltage line X2, and the voltage value of a signal supplied by the first voltage line X1 is greater than that of a signal supplied by the second voltage line X2; wherein, the first and the second end of the pipe are connected with each other,
the first input terminal IN1 of the switching circuit 40 is electrically connected to the output terminal of the first pixel circuit 31, and the output terminal OUT of the switching circuit 40 is electrically connected to the redundant light emitting device 20. The light emitting device in the embodiment of the invention includes a first electrode, an active layer, and a second electrode. The active layer can be excited to emit light after voltages are applied to the first electrode and the second electrode, respectively. Alternatively, for the normal light emitting device 10, when the normal light emitting device 10 is electrically connected to the first pixel circuit 31, the output terminal of the first pixel circuit 31 is electrically connected to the first electrode of the normal light emitting device 10.
The second input terminal IN2 of the switching circuit 40 is electrically connected to the first voltage line X1 for achieving the conduction of the path between the redundant light emitting device 20 and the first pixel circuit 31. That is, when the output terminal of the first pixel circuit 31 supplies the voltage signal to the first input terminal IN1 of the switching circuit 40 while the first voltage line X1 supplies the voltage signal to the second input terminal IN2 of the switching circuit 40, the switching circuit 40 is configured such that the path between the first pixel circuit 31 and the redundant light emitting device 20 is turned on, and the first pixel circuit 31 can supply the driving current to the redundant light emitting device 20 to drive the redundant light emitting device 20 to emit light.
The second input terminal IN2 of the switching circuit 40 is electrically connected to the second voltage line X2 for realizing the path cutoff between the redundant light emitting device 20 and the first pixel circuit 31. That is, when the output terminal of the first pixel circuit 31 supplies the voltage signal to the first input terminal IN1 of the switching circuit 40 while the second voltage line X2 supplies the voltage signal to the second input terminal IN2 of the switching circuit 40, the switching circuit 40 is configured such that a path between the first pixel circuit 31 and the redundant light emitting device 20 is cut off, the first pixel circuit 31 cannot supply the driving current to the redundant light emitting device 20, and the redundant light emitting device 20 does not emit light.
The switching circuit 40 IN this embodiment is configured to include two input terminals and one output terminal, and the first input terminal IN1 is configured to be connected to the output terminal of the first pixel circuit 31, and the output terminal OUT is configured to be connected to the redundant light emitting device 20, so that the redundant light emitting device 20 is connected to the first pixel circuit 31 through the switching circuit 40. When the second input terminal IN2 is configured to be electrically connected to the first voltage line X1, it is possible to realize that the output signal of the output terminal of the switching circuit 40 has correlation with the input signal of the first input terminal IN1, so that the path between the redundant light emitting device 20 and the first pixel circuit 31 is turned on, and it is possible to realize that the redundant light emitting device 20 is driven to emit light by the first pixel circuit 31. When the second input terminal IN2 is configured to be electrically connected to the second voltage line X2, a path between the redundant light emitting device 20 and the first pixel circuit 31 can be cut off.
When the display panel is manufactured, the light emitting device is transferred onto the driving substrate, the defect of the light emitting device is detected, and the connection mode between the second input terminal IN2 of the switching circuit 40 and the voltage line group Z is configured according to the detection result. When the normal light emitting device 10 has a defect, the second input terminal IN2 of the configuration switching circuit is electrically connected to the first voltage line X1, and the switching circuit 40 is used to realize the conduction of the path between the redundant light emitting device 20 and the first pixel circuit 31; when the normal light emitting device 10 has no defect, the second input terminal IN2 of the configuration switching circuit 40 is electrically connected to the second voltage line X2, and the path cutoff between the redundant light emitting device 20 and the first pixel circuit 31 is achieved by the switching circuit 40. Therefore, the normal light-emitting device 10 with defects can be compensated, the product yield can be improved, and the cost can be reduced.
Two switching circuits 40 are illustrated in fig. 2, the two switching circuits 40 corresponding to the same voltage line group Z. In the display panel provided by the embodiment of the invention, one voltage line group Z corresponds to a plurality of switching circuits 40. By the arrangement, the number of the voltage line groups Z can be reduced, and the wiring space of the display panel is saved.
In some embodiments, the switching circuit in the embodiments of the present invention is an and circuit. Fig. 3 is a schematic diagram of another display panel according to an embodiment of the present invention, and fig. 3 illustrates a specific structure of a switching circuit 40. As shown in fig. 3, the switching circuit 40 includes two diodes, i.e., a first diode 41 and a second diode 42, and a resistor R. The cathode of the first diode 41 is electrically connected to the first input terminal IN1, the cathode of the second diode 42 is electrically connected to the second input terminal IN2, and the anodes of the two diodes and one end of the resistor R are electrically connected to the output terminal OUT. The cathode of the first diode 41 is electrically connected to the output terminal of the first pixel circuit 31, and the cathode of the second diode 42 is electrically connected to the first voltage line X1 or the second voltage line X2. The other end of the resistor R is electrically connected with the power end P, and the resistance value of the resistor R is 3K omega. The voltage drop of the first diode 41 and the second diode 42 is 0.7V when the first diode and the second diode are conducted in the forward direction.
For example, when the voltage signal output from the output terminal of the first pixel circuit 31 is set to be between 0V and 4V, the light emitting device can be driven to realize full gray scale display. The power source terminal P supplies a high level voltage signal higher than 4V. According to the working principle of an AND gate circuit: the output is high only if all inputs are high at the same time, otherwise the output is low. The voltage value of the voltage signal supplied from the first voltage line X1 is set to be larger than the voltage value of the voltage signal supplied from the second voltage line X2. When the second input terminal IN2 of the configuration switching circuit 40 is electrically connected to the first voltage line X1, it can be achieved that the output signal of the output terminal of the switching circuit 40 has a correlation with the input signal of the first input terminal IN1, so that the path between the redundant light emitting device 20 and the first pixel circuit 31 is turned on, and it can be achieved that the redundant light emitting device 20 is driven to emit light by the first pixel circuit 31. When the second input terminal IN2 is configured to be electrically connected to the second voltage line X2, a path between the redundant light emitting device 20 and the first pixel circuit 31 can be cut off.
When the second input terminal IN2 of the switching circuit 40 is electrically connected to the second voltage line X2, since the voltage value supplied from the second voltage line X2 is small, that is, the second input terminal IN2 inputs a low level, the output terminal OUT can only output a low level. Taking the voltage value provided by the second voltage line X2 as 0V for example, when the second input terminal IN2 of the switching circuit 40 is electrically connected to the second voltage line X2, the second diode 42 will be turned on, and the voltage drop of the second diode 42 is limited to 0.7V. When the voltage signal supplied from the output terminal of the first pixel circuit 31 to the first input terminal IN1 is 0V, the first diode 41 and the second diode 42 are both forward-biased, and the output terminal OUT of the switching circuit 40 outputs a low-level signal of 0.7V. When the voltage signal provided by the output terminal of the first pixel circuit 31 to the first input terminal IN1 is greater than 0V, since the voltage at the anode of the first diode 41 is 0.7V, the first diode 41 will be reversely biased and turned off, and finally the output terminal OUT of the switching circuit 40 outputs a low level signal of 0.7V. And the output terminal of the switching circuit 40 supplies a low level signal to the redundant light emitting device 20, the redundant light emitting device 20 cannot be driven to emit light. That is, the second input terminal IN2 of the switching circuit 40 is set to be electrically connected to the second voltage line X2, the switching circuit 40 is configured to realize the path cutoff between the redundant light emitting device 20 and the first pixel circuit 31.
When the second input terminal IN2 of the switching circuit 40 is electrically connected to the first voltage line X1, the voltage value provided by the first voltage line X1 is taken as 4V for example. The voltage value of the voltage signal supplied from the output terminal of the first pixel circuit 31 to the first input terminal IN1 is not more than 4V. When the first diode 41 is forward biased, the anode potential of the first diode 41 is U +0.7V, and U is the voltage value of the voltage signal provided by the output terminal of the first pixel circuit 31 to the first input terminal IN1, and at this time, the second diode 42 is turned off because the anode voltage is smaller than the cathode voltage, and the voltage output by the output terminal OUT of the switching circuit 40 is U +0.7V. That is, when the second input terminal IN2 of the switching circuit 40 is electrically connected to the first voltage line X1, the output signal of the output terminal OUT of the switching circuit 40 is +0.7V of the input signal of the first input terminal IN1, and the output signal of the output terminal OUT of the switching circuit 40 can drive the redundant light emitting device 20 to perform full gray scale display.
As can be understood from the above description of the principle, in the embodiment in which the switching circuit 40 includes the and circuit, by configuring the switching circuit 40, when the normal light emitting device 10 has a defect, the conduction of the path between the first pixel circuit 31 and the redundant light emitting device 20 is realized by the switching circuit 40, and the first pixel circuit 31 can realize the driving of the redundant light emitting device 20 for the full gray scale display. When the normal light emitting device 10 is not defective, the output terminal of the switching circuit 40 supplies a low level signal to the redundant light emitting device 20, and the redundant light emitting device 20 cannot be driven to emit light, i.e., the path cutoff between the first pixel circuit 31 and the redundant light emitting device 20 is realized by the switching circuit 40.
In one embodiment, the output terminal of the first pixel circuit 31 is connected to the redundant light emitting device 20 through the switching circuit 40, and at the same time, the output terminal of the first pixel circuit 31 is electrically connected to the normal light emitting device 10. When the first pixel circuit 31 is electrically connected to the redundant light emitting device 20 through the switching circuit 40 and the voltage value provided by the output terminal of the switching circuit 40 to the redundant light emitting device 20 is greater than the voltage value received by the first input terminal IN1 of the switching circuit 40 after the switching circuit 40 is activated, the luminance of the redundant light emitting device 20 is different from the expected luminance. At this time, the magnitude of the data signal written to the first pixel circuit 31 may be reduced to make the light emission luminance of the redundant light emitting device 20 close to the intended luminance, ensuring the display panel luminance uniformity.
In an embodiment, fig. 4 is a schematic diagram of another display panel according to an embodiment of the present invention, as shown in fig. 4, the voltage line group Z further includes a third voltage line X3, the and circuit further includes a power source terminal P, the power source terminal P is electrically connected to the third voltage line X3, and a voltage value of a signal provided by the third voltage line X3 is greater than a voltage value of a signal provided by the first voltage line X1. As understood in conjunction with the switching circuit 40 illustrated in fig. 3, the other end of the resistor R is connected to the third voltage line X3.
In some embodiments, the pixel circuit 30 further includes a plurality of second pixel circuits. Fig. 5 is a schematic diagram of another display panel according to an embodiment of the invention, and as shown in fig. 5, an output terminal of the second pixel circuit 32 is electrically connected to the normal light emitting device 10. The redundant light emitting device 20 is connected to the first pixel circuit 31 through the switching circuit 40. In this embodiment, the redundant light emitting device 20 and the normal light emitting device 10 corresponding thereto are connected to different pixel circuits. The positions of the redundant light emitting devices 20 can be designed, so that two or more normal light emitting devices 10 correspond to the same redundant light emitting device 20, and one redundant light emitting device 20 can compensate for two or more sub-pixel display defects, so that the number of the redundant light emitting devices 20 can be reduced, and the space of a display area can be saved.
In some embodiments, one redundant light emitting device 20 corresponds to two normal light emitting devices 10, wherein the two normal light emitting devices 10 are adjacent normal light emitting devices 10 that emit light of the same color. Fig. 6 is a simplified schematic diagram of another display panel according to an embodiment of the present invention, and fig. 6 schematically illustrates an arrangement of light emitting devices, which is not intended to limit the present invention. As shown in fig. 6, the normal light emitting device 10 includes a red light emitting device 10R, a blue light emitting device 10B, and a green light emitting device 10G. The redundant light emitting device 20 includes a red redundant light emitting device 20R, a blue redundant light emitting device 20B, and a green redundant light emitting device 20G. Among them, the red redundant light emitting device 20R corresponds to two adjacent red light emitting devices 10R, the blue redundant light emitting device 20B corresponds to two adjacent blue light emitting devices 10B, and the green redundant light emitting device 20G corresponds to two adjacent green light emitting devices 10G. Taking the red redundant light emitting device 20R as an example corresponding to two adjacent red light emitting devices 10R, that is, when any one of the two adjacent red light emitting devices 10R has a defect, the display can be replaced with the red redundant light emitting device 20R corresponding thereto. In order to realize a color display, the red light emitting device 10R, the blue light emitting device 10B, and the green light emitting device 10G are required to be matched to mix colors to constitute a display unit. The arrangement of the embodiment of the invention can reduce the number of the redundant light emitting devices 20, thereby saving the space of the display area. Meanwhile, the distance between the normal light emitting device 10 and the corresponding redundant light emitting device 20 is not too far, and when the redundant light emitting device 20 is started to replace the normal light emitting device 10 for displaying, the display unit has a better light mixing display effect when the redundant light emitting device 20 participates in color mixing for displaying.
In some embodiments, an embodiment of the present invention further provides a method for manufacturing a display panel, which can be used to manufacture the display panel provided in the embodiment of the present invention. Fig. 7 is a flowchart of a manufacturing method of a display panel according to an embodiment of the present invention, and as shown in fig. 7, the manufacturing method includes:
step S101: a driving substrate is provided. Fig. 8 is a simplified schematic diagram of a circuit structure in a driving substrate according to an embodiment of the present invention. As shown in fig. 8, the driving substrate includes a pixel circuit 30, a switching circuit 40, a voltage line group Z; the pixel circuit 30 includes a first pixel circuit 31, the switching circuit 40 includes a first input terminal IN1, a second input terminal IN2, and an output terminal OUT, and the voltage line group Z includes one first voltage line X1 and one second voltage line X2; the first input terminal IN1 of the switching circuit 40 is electrically connected to the output terminal of the first pixel circuit 31, and the second input terminal IN2 of the switching circuit 40 is electrically connected to the first voltage line X1 and the second voltage line X2.
Ports corresponding to the normal light emitting devices and the redundant light emitting devices are reserved in the driving substrate. The output terminal of the switching circuit 40 is exposed as a port connected to the redundant light emitting device, and the redundant light emitting device corresponds to the output terminal of the switching circuit 40 after the redundant light emitting device is transferred onto the driving substrate.
In an embodiment where part of the normal light emitting devices and the redundant light emitting devices share the first pixel circuit 31, the output terminal of the first pixel circuit 31 is used for corresponding connection with the normal light emitting devices.
In some embodiments, the redundant light emitting device and the corresponding normal light emitting device are connected to different pixel circuits, and a second pixel circuit is provided in the driving substrate, and an output terminal outlet port of the second pixel circuit is used for corresponding connection with the normal light emitting device.
Step S102: transferring a plurality of light emitting devices onto a driving substrate, the light emitting devices including normal light emitting devices and redundant light emitting devices, one redundant light emitting device corresponding to at least one normal light emitting device; the redundant light emitting device is electrically connected with the output end of the switching circuit. Fig. 9 is a schematic circuit configuration diagram of the display panel after the light emitting device is transferred onto the driving substrate. Fig. 9 illustrates an example in which the normal light emitting device and the redundant light emitting device share the first pixel circuit in the partial display area, as shown in fig. 9, the normal light emitting device 10 is electrically connected to the first pixel circuit 31, and the redundant light emitting device 20 is electrically connected to the first pixel circuit 31 through the switching circuit 40. The first input terminal IN1 of the switching circuit 40 is connected to the output terminal of the first pixel circuit 31, the second input terminal IN2 of the switching circuit 40 is electrically connected to the first voltage line X1 and the second voltage line X2, and the output terminal OUT of the switching circuit 40 is electrically connected to the redundant light emitting device 20.
After step S102, the defect of the light emitting device is detected, and when it is detected that the normal light emitting device has a display defect, the switching circuit 40 is configured in the subsequent step according to the defect detection result of the normal light emitting device, so as to replace the defective normal light emitting device with the redundant light emitting device.
Step S103: configuring the switching circuit 40 according to the defect detection result of the normal light emitting device 10; wherein, when the normal light emitting device 10 corresponding to the redundant light emitting device 20 is defective, the connection wire between the second input terminal IN2 of the switching circuit 40 and the second voltage line X2 is blown so that the second input terminal IN2 of the switching circuit 40 is electrically connected only to the first voltage line X1; when the normal light emitting device 10 corresponding to the redundant light emitting device 20 has no defect, the connection wire between the second input terminal IN2 of the switching circuit 40 and the first voltage line X1 is fused so that the second input terminal IN2 of the switching circuit 40 is electrically connected only to the second voltage line X2.
Fig. 10 is a schematic diagram of a circuit structure in the display panel after step S103. Three normal light emitting devices, 10-1, 10-2 and 10-3, respectively, are illustrated in FIG. 10. Three redundant light emitting devices, 20-1, 20-2, and 20-3, respectively. The defect detection result shows that the normal light emitting device 10-1 and the normal light emitting device 10-2 have a display defect, and the normal light emitting device 10-3 has no defect. As shown IN fig. 10, IN step S103, the connecting wire between the second input terminal IN2 of the switching circuit 40 corresponding to the redundant light emitting device 20-1 and the second voltage line X2 is fused so that the second input terminal IN2 of the switching circuit 40 is electrically connected to only the first voltage line X1; fusing a connection wire between the second input terminal IN2 of the switching circuit 40 corresponding to the redundant light emitting device 20-2 and the second voltage line X2 so that the second input terminal IN2 of the switching circuit 40 is electrically connected only to the first voltage line X1; the connection wire between the second input terminal IN2 of the switching circuit 40 corresponding to the redundant light emitting device 20-3 and the first voltage line X1 is fused so that the second input terminal IN2 of the switching circuit 40 is electrically connected only to the second voltage line X2.
When the display panel is driven to display, the voltage value of the voltage signal provided by the first voltage line X1 is controlled to be larger than the voltage value of the voltage signal provided by the second voltage line X2. The switching circuit 40 corresponding to the redundant light emitting device 20-1 can be used to realize the path conduction between the redundant light emitting device 20-1 and the first pixel circuit 31, and the redundant light emitting device 20-1 can replace the normal light emitting device 10-1 to emit light for display. Likewise, the switching circuit 40 corresponding to the redundant light emitting device 20-2 is configured to realize the conduction of the path between the redundant light emitting device 20-2 and the first pixel circuit 31, and the redundant light emitting device 20-2 can emit light for display in place of the normal light emitting device 10-2. And the switching circuit 40 corresponding to the redundant light emitting device 20-3 is configured to achieve path cutoff between the redundant light emitting device 20-3 and the first pixel circuit 31, the redundant light emitting device 20-3 does not emit light.
By adopting the manufacturing method provided by the embodiment of the invention, before the light-emitting device is transferred to the driving substrate, the light-emitting device is not configured by the switching circuit, the first input end of the switching circuit is electrically connected with the output end of the first pixel circuit, and the second input end of the switching circuit is electrically connected with the first voltage line and the second voltage line. Configuring a switching circuit according to a defect detection result of the light emitting device after transferring the light emitting device to the driving substrate such that a second input terminal of the switching circuit is electrically connected to only one of the first voltage line and the second voltage line; when the second input terminal of the switching circuit is electrically connected with the first voltage line, the switching circuit is configured to realize the conduction of a path between the redundant light emitting device and the first pixel circuit; when the second input terminal of the switching circuit is electrically connected to the second voltage line, the switching circuit is configured to realize a path cutoff between the redundant light emitting device and the first pixel circuit. By adopting the manufacturing method provided by the embodiment of the invention, the redundant light-emitting device can be used for replacing a normal light-emitting device with defects, the product yield can be improved, and the cost can be reduced.
In an embodiment, fig. 11 is a simplified schematic diagram of another display panel provided in an embodiment of the present invention, and fig. 11 is only for explaining a setting manner of voltage lines in a voltage line group in the embodiment of the present invention, and is not limited to the present invention. As shown in fig. 11, the first voltage line X1 and the second voltage line X2 extend in the same direction, and the first voltage line X1 and the second voltage line X2 are located in different layers. Also illustrated in fig. 11 are a plurality of switching circuits 40, and one voltage line group Z corresponds to the plurality of switching circuits 40. The first voltage line X1 and the second voltage line X2 are arranged in different layers, so that the mutual crossing short circuit between the first voltage line X1 and the second voltage line X2 can be avoided, the design that one voltage line group Z corresponds to a plurality of switching circuits 40 can be realized, and the number of wiring lines of the voltage lines in the display panel is reduced.
As shown IN fig. 11, the display panel further includes a first connection line LX, one end of the first connection line LX is electrically connected to the second input terminal IN2 of the switching circuit 40, and the other end of the first connection line LX is floating. The first connection line LX-1 and the first connection line LX-2 are illustrated in fig. 11. The first connecting line LX-1 corresponds to the first voltage line X1, and the connecting line between the first voltage line X1 and the second input terminal IN2 of the switching circuit 40 is fused during the manufacturing process of the display panel, so that the first connecting line LX-1 is electrically connected to the second input terminal IN2 of the switching circuit 40. The second connecting line LX-2 corresponds to the second voltage line X2, and the connecting line between the second voltage line X2 and the second input terminal IN2 of the switching circuit 40 is fused to form the second connecting line LX-2 electrically connected to the second input terminal IN2 of the switching circuit 40.
Fig. 12 is a schematic view of a display device according to an embodiment of the present invention, and as shown in fig. 12, the display device includes a display panel 100 according to any embodiment of the present invention. The structure of the display panel has been described in the above embodiments, and is not described herein again. The display device provided by the embodiment of the invention is any equipment with a display function, such as a mobile phone, a tablet computer, a notebook computer, an electronic book, a television, an intelligent watch and the like.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and these modifications or substitutions do not depart from the spirit of the corresponding technical solutions of the embodiments of the present invention.
Claims (11)
1. A display panel comprising normal light emitting devices and redundant light emitting devices, one of said redundant light emitting devices corresponding to at least one of said normal light emitting devices;
the display panel includes a pixel circuit including a first pixel circuit; the redundant light emitting device is connected with the first pixel circuit through a switching circuit;
the switching circuit is used for realizing the conduction or the cutoff of a path between the redundant light-emitting device and the first pixel circuit;
the switching circuit comprises a first input end, a second input end and an output end;
the display panel further comprises at least one voltage line group, wherein the voltage line group comprises a first voltage line and a second voltage line, and the voltage value of a signal supplied by the first voltage line is larger than that of a signal supplied by the second voltage line; wherein the content of the first and second substances,
a first input end of the switching circuit is electrically connected with an output end of the first pixel circuit, and an output end of the switching circuit is electrically connected with the redundant light emitting device;
the second input end of the switching circuit is electrically connected with the first voltage line and is used for realizing the conduction of a path between the redundant light-emitting device and the first pixel circuit; or the second input end of the switching circuit is electrically connected with the second voltage line for realizing the path cut-off between the redundant light emitting device and the first pixel circuit.
2. The display panel according to claim 1,
the switching circuit is an AND gate circuit.
3. The display panel according to claim 2,
the set of voltage lines further includes a third voltage line,
the AND circuit further comprises a power supply end, the power supply end is electrically connected with the third voltage line, and the voltage value of the signal provided by the third voltage line is larger than the voltage value of the signal provided by the first voltage line.
4. The display panel according to claim 1,
the output end of the first pixel circuit is also electrically connected with at least one normal light emitting device.
5. The display panel according to claim 1,
the pixel circuit further includes a plurality of second pixel circuits, and an output terminal of the second pixel circuit is electrically connected to at least one of the normal light emitting devices.
6. The display panel according to claim 1,
one of the voltage line groups corresponds to a plurality of the switching circuits.
7. The display panel according to claim 6,
the first voltage line and the second voltage line have the same extension direction, and are located in different layers.
8. The display panel according to claim 1,
the display panel further comprises a first connecting wire, one end of the first connecting wire is electrically connected with the second input end of the switching circuit, and the other end of the first connecting wire is suspended.
9. The display panel according to claim 1,
one redundant light emitting device corresponds to two normal light emitting devices, wherein the two normal light emitting devices are adjacent normal light emitting devices which have the same light emitting color.
10. A manufacturing method of a display panel is characterized by comprising the following steps:
providing a driving substrate; the driving substrate comprises a pixel circuit, a switching circuit and a voltage line group; the pixel circuit comprises a first pixel circuit, the switching circuit comprises a first input end, a second input end and an output end, and the voltage line group comprises a first voltage line and a second voltage line; a first input terminal of the switching circuit is electrically connected to an output terminal of the first pixel circuit, and a second input terminal of the switching circuit is electrically connected to the first voltage line and the second voltage line;
transferring a plurality of light emitting devices onto the driving substrate, the light emitting devices including normal light emitting devices and redundant light emitting devices, one of the redundant light emitting devices corresponding to at least one of the normal light emitting devices; wherein the redundant light emitting device is electrically connected with the output end of the switching circuit;
configuring the switching circuit according to the defect detection result of the normal light emitting device; wherein when the normal light emitting device corresponding to the redundant light emitting device is defective, a connection wire between the second input terminal of the switching circuit and the second voltage line is fused so that the second input terminal of the switching circuit is electrically connected only to the first voltage line; and fusing a connection wire between the second input terminal of the switching circuit and the first voltage line so that the second input terminal of the switching circuit is electrically connected only to the second voltage line when the normal light emitting device corresponding to the redundant light emitting device has no defect.
11. A display device characterized by comprising the display panel according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234045.1A CN113889033B (en) | 2021-10-22 | 2021-10-22 | Display panel, manufacturing method thereof and display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111234045.1A CN113889033B (en) | 2021-10-22 | 2021-10-22 | Display panel, manufacturing method thereof and display device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113889033A CN113889033A (en) | 2022-01-04 |
| CN113889033B true CN113889033B (en) | 2022-11-11 |
Family
ID=79004382
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111234045.1A Active CN113889033B (en) | 2021-10-22 | 2021-10-22 | Display panel, manufacturing method thereof and display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113889033B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114613884A (en) * | 2022-02-22 | 2022-06-10 | 重庆惠科金渝光电科技有限公司 | Display panel and repairing method thereof |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011048101A (en) * | 2009-08-26 | 2011-03-10 | Renesas Electronics Corp | Pixel circuit and display device |
| JP5381721B2 (en) * | 2010-01-07 | 2014-01-08 | ソニー株式会社 | Display device, light detection method, electronic device |
| CN107623019A (en) * | 2017-08-30 | 2018-01-23 | 上海天马微电子有限公司 | A kind of display panel, its preparation method and display device |
| CN110197638A (en) * | 2019-06-28 | 2019-09-03 | 上海天马有机发光显示技术有限公司 | A kind of driving method of display panel, display device and display panel |
| CN213519210U (en) * | 2020-11-12 | 2021-06-22 | 重庆康佳光电技术研究院有限公司 | Pixel circuit, light-emitting device, and display panel |
-
2021
- 2021-10-22 CN CN202111234045.1A patent/CN113889033B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN113889033A (en) | 2022-01-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11056041B2 (en) | Display panel redundancy schemes | |
| US11688336B2 (en) | Array substrate, display panel, spliced display panel and display driving method | |
| US11210975B2 (en) | Transparent display device and transparent display panel | |
| CN100423061C (en) | Organic electroluminescent device with stand-by driving unit | |
| CN101833916B (en) | Pixel drive circuit of a luminous display panel | |
| US20200027944A1 (en) | Array Substrate And Method For Repairing Array Substrate | |
| TW200427062A (en) | Electronic device, device substrate, optoelectronic device, manufacturing method of optoelectronic device and electronic machine | |
| US10991789B2 (en) | Foldable display device having plurality of signal lines connected to non-foldable display regions | |
| CN211654192U (en) | Array substrate and splicing display panel | |
| CN108447441B (en) | Pixel circuit and its driving method, display base plate, display device | |
| CN113889033B (en) | Display panel, manufacturing method thereof and display device | |
| CN110648632B (en) | Display substrate and driving method thereof | |
| US11049439B2 (en) | Display device, tiling electronic device and method for repairing a display device | |
| CN110390900B (en) | Display device and spliced electronic device | |
| CN108538863B (en) | Display substrate, repairing method thereof and display device | |
| WO2021227713A1 (en) | Array substrate and detection method therefor, and tiled display panel | |
| US20110291098A1 (en) | Organic el display device, mother substrate of organic el display device, and method of testing organic el display device | |
| CN113257185B (en) | Display panel, display device and method for arranging light-emitting elements of display panel | |
| WO2022068653A1 (en) | Display apparatus, driving chip, and electronic device | |
| CN113299232A (en) | Display panel, driving method thereof and display device | |
| CN107808633B (en) | Pixel circuit, display panel and display device | |
| US11854493B2 (en) | Display substrate and display device | |
| CN117012122A (en) | Display panel, testing method thereof and display device | |
| WO2021109008A1 (en) | Light emitting diode display module, repairing method therefor, and display device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |