CN107464525A - A kind of display panel repairing method and display panel - Google Patents
A kind of display panel repairing method and display panel Download PDFInfo
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- CN107464525A CN107464525A CN201710850561.4A CN201710850561A CN107464525A CN 107464525 A CN107464525 A CN 107464525A CN 201710850561 A CN201710850561 A CN 201710850561A CN 107464525 A CN107464525 A CN 107464525A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000003990 capacitor Substances 0.000 claims description 84
- 239000002184 metal Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 19
- 230000015556 catabolic process Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 2
- 238000005067 remediation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
-
- 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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
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- 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]
- G09G3/3208—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] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
- G09G3/3258—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] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix with pixel circuitry controlling the voltage across the light-emitting element
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention provides a kind of display panel repairing method and display panel.This method includes：Determine pixel cell to be repaired, the connection of the control terminal of driving voltage and switch element in short circuit or open circuit pixel cell to be repaired, so that switch element is chronically at off-state, dim spotization pixel cell to be repaired in pixel cell after repairing.Implement the embodiment of the present invention, dim spot pixel cell method is simple, it is not necessary to puncture luminescent device, remediation efficiency is high.
Description
Technical Field
The invention relates to the technical field of display, in particular to a display panel repairing method and a display panel.
Background
An organic light emitting display panel is an active light emitting display panel. Compared with the mainstream thin film transistor liquid crystal display panel, the liquid crystal display panel has the advantages of high contrast, wide viewing angle, low power consumption, thin volume and the like, and is expected to become a next generation display panel following the thin film transistor liquid crystal display panel.
In the process of preparing the organic light-emitting display panel, pixel point defects and signal line disconnection defects are two main defects which are inevitable in the preparation process, and when the defects are detected, the organic light-emitting display panel needs to be repaired before leaving the factory.
In the prior art, a method of breaking down an organic light emitting device of a pixel point to be repaired is usually adopted to darken the pixel point, so as to repair an organic light emitting display panel. However, the area of the organic light emitting device is large, a large breakdown energy is required for breakdown, and it takes a long time to completely breakdown, thereby causing a low repair efficiency of the pixel.
Disclosure of Invention
The embodiment of the invention provides a display panel repairing method and a display panel, wherein the connection between a driving voltage in a pixel unit to be repaired and a control end of a switch unit is short-circuited or broken, so that the switch unit in the repaired pixel unit is in a disconnected state for a long time, the pixel unit to be repaired is darkened, and the repairing efficiency is high.
In a first aspect, an embodiment of the present invention provides a method for repairing a display panel, where the display panel includes a plurality of pixel units arranged in an array, where each pixel unit includes a light emitting device and a pixel driving circuit; the pixel driving circuit comprises a capacitor and a switch unit; the control end of the switch unit is connected with a driving voltage through the capacitor, the first port of the switch unit is connected with a data signal, the second port of the switch unit is connected with one end of the light-emitting device, and the other end of the light-emitting device is connected with a reference voltage; the switch unit is used for conducting a first port and a second port of the switch unit when a scanning signal connected with the switch unit is effective and the level of the control end is effective, so that the data signal drives the light-emitting device to emit light for display; the display panel repairing method comprises the following steps:
determining a pixel unit to be patched;
and short-circuiting or breaking the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit so as to enable the switch unit in the repaired pixel unit to be in a disconnected state for a long time and darken the pixel unit to be repaired.
With reference to the first aspect, in a first implementation of the first aspect, the short-circuiting connection between a driving voltage in the pixel unit to be repaired and a control terminal of a switch unit includes:
and breaking down the capacitor in the pixel unit to be repaired to input a control signal in the repaired pixel unit to the control end of the switch unit, so that the switch unit in the repaired pixel unit is in a disconnected state for a long time, and darkening the repaired pixel unit.
With reference to the first implementation manner of the first aspect, in a second implementation manner of the first aspect, the capacitor includes a first metal plate and a second metal plate that are oppositely disposed; the breakdown of the capacitor in the pixel to be repaired comprises:
and welding the first metal plate and the second metal plate of the capacitor through laser to conduct the first metal plate and the second metal plate.
With reference to the first aspect, in a third implementation of the first aspect, a control terminal of the switching unit is connected to a first terminal of the capacitor, and a second terminal of the capacitor is connected to the driving voltage; the step of disconnecting the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit comprises the following steps:
and cutting off a connecting line between the control end of the switch unit in the pixel unit to be repaired and the first end of the capacitor so as to block effective signals from being input to the control end of the switch unit in the repaired pixel unit during the light-emitting stage of the pixel unit, so that the switch unit in the repaired pixel unit is in a disconnected state, and darkening the repaired pixel unit.
With reference to the third implementation of the first aspect, in a fourth implementation of the first aspect, the cutting off the connection line between the control terminal of the switch unit and the first terminal of the capacitor in the pixel unit to be repaired includes: and cutting off a connecting line between the control end of the switch unit in the pixel unit to be repaired and the first end of the capacitor through laser.
With reference to the first aspect, in a fifth implementation of the first aspect, a control terminal of the switching unit is connected to a first terminal of the capacitor, and a second terminal of the capacitor is connected to the driving voltage; the disconnecting the connection of the driving voltage to the control terminal of the switching unit includes:
and cutting off a connecting line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired so as to block an effective signal from being input to the control end of the switch unit in the repaired pixel unit during the light emitting stage of the pixel unit, so that the switch unit in the repaired pixel unit is in a disconnected state, and darkening the repaired pixel unit.
With reference to the fifth implementation of the first aspect, in a sixth implementation of the first aspect, the cutting off a connection line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired includes: and cutting off a connecting line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired by laser.
With reference to the first aspect and any one of the first to sixth implementations of the first aspect, in a seventh implementation of the first aspect, the pixel driving circuit includes one of a 2T1C driving pixel circuit, a 4T2C driving pixel compensation circuit, a 4T2C driving pixel compensation circuit, a 5T1C driving pixel compensation circuit, a 6T1C driving pixel compensation circuit, a 6T2C driving pixel compensation circuit, and a 7T1C driving pixel compensation circuit.
In a second aspect, embodiments of the present invention further provide a display panel, where the display panel includes a plurality of pixel units arranged in an array, where each pixel unit includes a light emitting device and a pixel driving circuit; the pixel unit comprises a light emitting device and a pixel driving circuit; the pixel driving circuit comprises a capacitor and a switch unit; the control end of the switch unit is connected with a driving voltage through the capacitor, the first port of the switch unit is connected with a data signal, the second port of the switch unit is connected with one end of the light-emitting device, and the other end of the light-emitting device is connected with a reference voltage; the switch unit is used for conducting a first port and a second port of the switch unit when a scanning signal connected with the switch unit is effective and the level of the control end is effective, so that the data signal drives the light-emitting device to emit light for display; wherein,
the display panel also comprises a repaired pixel unit, wherein the short circuit or the open circuit between the driving voltage and the control end of the switch unit in the repaired pixel unit enables the switch unit in the repaired pixel unit to be in a disconnected state for a long time, and the repaired pixel unit is darkened.
With reference to the second aspect, in a first implementation of the second aspect, the capacitor in the repaired pixel unit is broken down, so that a control signal in the repaired pixel unit is input to the control terminal of the switch unit, and the switch unit in the repaired pixel unit is in an off state for a long time, thereby darkening the repaired pixel unit.
With reference to the second aspect, in a second implementation of the second aspect, a first end of the capacitor is connected to the control end of the switch unit, and a second end of the capacitor is connected to the driving voltage;
the connecting line between the control end of the switch unit in the repaired pixel unit and the first end of the capacitor is disconnected; and/or
And the connecting line between the driving voltage and the second end of the capacitor in the repaired pixel unit is disconnected.
In a third aspect, embodiments of the present invention further provide a display device, where the display device includes any one of the display panels described in the second aspect.
In the embodiment of the invention, the display panel comprises a plurality of pixel units which are arranged in an array mode, wherein each pixel unit comprises a light-emitting device and a pixel driving circuit; the pixel driving circuit comprises a capacitor and a switch unit; the control end of the switch unit is connected with the driving voltage through a capacitor, and the switch unit is used for conducting the data line and the light-emitting device when the scanning signal connected with the switch unit is effective and the level of the control end is effective, so that the data signal transmitted on the data line drives the light-emitting device to emit light for display; the repairing method for the display panel comprises the following steps: and determining the pixel unit to be repaired, and short-circuiting or breaking the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit so as to enable the switch unit in the repaired pixel unit to be in a disconnected state for a long time and darken the pixel unit to be repaired. By implementing the embodiment of the invention, the method for darkening the pixel unit is simple, the light-emitting device does not need to be broken down, and the repairing efficiency is high.
Drawings
In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings used in the description of the embodiment will be briefly introduced below.
Fig. 1 is a schematic circuit diagram of a pixel unit according to an embodiment of the present invention;
FIG. 2 is a circuit diagram of a 7T1C driving pixel compensation circuit according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a principle of a pixel unit after being repaired according to an embodiment of the invention;
FIG. 4 is a schematic diagram illustrating a pixel compensation circuit driven by the patch 7T1C according to an embodiment of the present invention;
FIG. 5 is a flowchart illustrating a method for repairing a display panel according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a breakdown capacitor according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
The display panel includes a plurality of pixel units arranged in an array. Referring to fig. 1, fig. 1 is a schematic circuit structure diagram of a pixel unit according to an embodiment of the invention. The pixel unit includes a light emitting device 11 and a pixel driving circuit 12; the pixel driving circuit 12 includes a capacitor C and a switching unit 121; the control terminal of the switch unit 121 is connected to a driving voltage Vdd through the capacitor C, the first port of the switch unit 121 is connected to a data signal Vda, the second port of the switch unit 121 is connected to one end of the light emitting device 11, and the other end of the light emitting device 11 is connected to a reference voltage; the switch unit 121 is configured to, when the scan signal scan (n) connected to the switch unit 121 is active and the level of the control terminal a is active, turn on the first port and the second port of the switch unit 121, so that the data signal Vda drives the light emitting device 11 to emit light for display.
The control terminal of the switch unit 121 is connected to the first terminal of the capacitor C, and the second terminal of the capacitor C is connected to the driving voltage Vdd.
It is understood that the switching unit 121 may include at least one switching tube.
In the present embodiment, the pixel driving circuit includes one of a 2T1C driving pixel circuit, a 4T2C driving pixel compensation circuit, a 4T2C driving pixel compensation circuit, a 5T1C driving pixel compensation circuit, a 6T1C driving pixel compensation circuit, a 6T2C driving pixel compensation circuit, a 7T1C driving pixel compensation circuit, and the like.
Referring to fig. 2, fig. 2 is a circuit diagram of a 7T1C driven pixel compensation circuit according to an embodiment of the present invention. The pixel compensation circuit comprises a first switch tube T1, a second switch tube T2, a third switch tube T3, a fourth switch tube T4, a fifth switch tube T5, a sixth switch tube T6, a seventh switch tube T7 and a first capacitor C1. A control end of the first switch tube T1 is connected to a lower pole plate of the first capacitor C1, a source electrode of the third switch tube T3 and a source electrode of the fourth switch tube T4, a drain electrode of the first switch tube T1 is connected to a drain electrode of the third switch tube T3 and a source electrode of the sixth switch tube T6, a source electrode of the first switch tube T1 is connected to a source electrode of the second switch tube T2 and a drain electrode of the fifth switch tube T5, a drain electrode of the second switch tube T2 is connected to the data signal Vda, and a gate electrode of the second switch tube T2 and a gate electrode of the third switch tube T3 are connected to the scan signal scan (n); the reset signal Vi is connected with the drain of the fourth switching tube T4 and the source of the seventh switching tube T7; the gate of the seventh switch transistor T7 is connected to the scan signal scan (n) or the scan correlation signal xscan (n) which changes synchronously with the scan signal scan (n); the grid electrode of the fourth switching tube T4 is connected to the primary Scan signal Scan (N-1), the upper plate electrode of the first capacitor C1 is connected to the driving signal Vdd and the source electrode of the fifth switching tube T5, the grid electrode of the fifth switching tube T5 and the grid electrode of the sixth switching tube T6 are connected to the compensation control signal EM, the drain electrode of the sixth switching tube T6 is connected to the anode of the light emitting diode and the drain electrode of the seventh switching tube T7, and the cathode of the light emitting diode is connected to the reference level.
The switching transistor in fig. 2 is a P-type transistor, and the driving signal and the data signal are high-level signals. Fig. 2 is merely an example provided by the present invention. The pixel driving circuit according to the present invention may be other types of circuit diagrams and/or other types of transistors, and the present invention is not limited thereto.
The display panel may include a pixel unit that cannot be normally displayed, and the pixel unit needs to be repaired. Darkening the pixel cell is one way to repair the pixel cell.
Referring to fig. 3 and fig. 4, fig. 3 is a schematic diagram illustrating a principle of a repaired pixel unit according to an embodiment of the invention. Fig. 4 is a schematic diagram illustrating a principle of a 7T 1C-patch driving pixel compensation circuit according to an embodiment of the present invention.
In the embodiment of the present invention, the display panel further includes a repaired pixel unit, where the repaired pixel unit includes a light emitting device 21 and a pixel driving circuit 22; the repaired pixel driving circuit 22 includes a capacitor C and a switch unit 221. The driving voltage Vdd in the repaired pixel unit is short-circuited or disconnected with the control terminal of the switch unit 221, so that the switch unit 221 in the repaired pixel unit is in an off state for a long time, and the repaired pixel unit is darkened.
In an embodiment of the present invention, a capacitor (e.g., the capacitor C in fig. 3 or the capacitor C1 in fig. 4) in the repaired pixel unit is broken down, so that the driving voltage Vdd in the repaired pixel unit is input to the control terminal of the switch unit 221, and the switch unit (e.g., the switch unit 221 in fig. 3 or the third switch transistor T3 in fig. 4) in the repaired pixel unit is in an off state for a long time, thereby darkening the repaired pixel unit.
The control end of the switch unit is connected with the first end of the capacitor, and the second end of the capacitor is connected with the driving voltage
In an embodiment of the invention, a connection line between a control terminal of a switch unit (e.g., the control terminal a of the switch unit 221 in fig. 3 or the gate of the third switch transistor T3 in fig. 4) and a first terminal of a capacitor (e.g., the first terminal of the capacitor C in fig. 3 or the lower plate of the capacitor C1 in fig. 4) in the repaired pixel unit is disconnected.
It can be understood that, for the pixel compensation circuit driven by 7T1C after repair shown in fig. 4, point a is the intersection of the first capacitor C1, the source of the fourth switching tube T4 and the gate of the first switching tube T1, the connection line between point a and the gate of the first switching tube T1 (the first cut-off position shown in fig. 4) may be cut off, and the connection line between point a and the lower plate of the first capacitor C1 (the second cut-off position shown in fig. 4) may also be cut off.
In an embodiment of the invention, the connection line between the driving voltage Vdd and the second terminal of the capacitor (e.g., the second terminal of the capacitor C in fig. 4 or the upper plate of the capacitor C1 in fig. 4) in the repaired pixel unit is disconnected.
It will be appreciated that for the repaired 7T1C pixel compensation circuit shown in fig. 4, the connection between the driving voltage Vdd and the top plate of the first capacitor C1 can be cut off (the third cut-off position shown in fig. 4).
It should be noted that the switching tubes according to the present invention may be all P-type transistors (the source and the drain are turned on when the gate is low) as shown in fig. 1 to 4, but in another embodiment of the present invention, some or all of the transistors in the drawings may be replaced by N-type transistors (the source and the drain are turned on when the gate is high), and the present invention is not limited thereto. Furthermore, the connection mode of the source and the drain of each transistor can be determined according to the type of the selected transistor, and when the transistor has a symmetric structure, the source and the drain can be regarded as two electrodes without special distinction, which are well known to those skilled in the art and will not be described herein again.
Referring to fig. 5, fig. 5 is a schematic flow chart illustrating a method for repairing a display panel according to an embodiment of the present invention, the method including the following steps:
step S1: determining a pixel unit to be patched;
step S2: and short-circuiting or breaking the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit so as to enable the switch unit in the repaired pixel unit to be in a disconnected state for a long time and darken the pixel unit to be repaired.
In an embodiment of the present invention, one implementation manner of short-circuiting connection between a driving voltage in a pixel unit to be repaired and a control terminal of a switch unit may be: and (3) breaking down a capacitor (such as a capacitor C in fig. 3 or a capacitor C1 in fig. 4) in the pixel unit to be repaired, so that a control signal in the repaired pixel unit is input to the control end of the switch unit, the switch unit in the repaired pixel unit is in an off state for a long time, and the repaired pixel unit is darkened.
In an embodiment of the present invention, please refer to fig. 6, and fig. 6 is a schematic diagram illustrating a principle of a breakdown capacitor according to an embodiment of the present invention. As shown in fig. 6, the capacitor includes a first metal plate 601 and a second metal plate 602 disposed oppositely; it will be appreciated that metals absorb more energy from the laser, and therefore one implementation of breakdown of the capacitance in the pixel to be repaired may be: the first metal plate 601 and the second metal plate 602 of the capacitor are welded by laser to conduct the first metal plate 601 and the second metal plate 602.
In an embodiment of the present invention, a first implementation manner of disconnecting the connection between the driving voltage in the pixel unit to be repaired and the control terminal of the switch unit may be: the connecting line between the control end (for example, node a in fig. 3) of the switch unit in the pixel unit to be repaired and the first end (for example, point P in fig. 3) of the capacitor is cut off to block the effective signal from being input to the control end of the switch unit in the pixel unit after being repaired, so that the switch unit in the pixel unit after being repaired is in an off state, and the pixel unit after being repaired is shaded.
It can be understood that, for the repaired 7T1C pixel compensation circuit shown in fig. 4, point a is the intersection of the source of the first capacitor C1 and the fourth switching tube T4 and the gate of the first switching tube T1, the connection line between point a and the gate of the first switching tube T1 (the first cut-off position shown in fig. 4) may be cut off, and the connection line between point a and the lower plate of the first capacitor C1 (the second cut-off position shown in fig. 4) may also be cut off.
The active signal is a signal for turning on the switching element, and for the 7T1C driving pixel compensation circuit shown in fig. 2, the active signal is at a low level for turning on the first switching transistor T1.
Alternatively, the connection line between the control terminal of the switching unit and the first terminal of the capacitor in the pixel unit to be repaired may be cut by laser.
In an embodiment of the present invention, a second implementation manner of disconnecting the connection between the driving voltage in the pixel unit to be repaired and the control terminal of the switch unit may be: the connecting line between the driving voltage Vdd and the second end (e.g., point Q in fig. 3) of the capacitor in the pixel unit to be repaired is cut off to block the effective signal from being input to the control end of the switch unit during the light emitting period of the pixel unit, so that the switch unit in the repaired pixel unit is in an off state to darken the repaired pixel unit.
It will be appreciated that for the repaired 7T1C pixel compensation circuit shown in fig. 4, the connection between the driving voltage Vdd and the top plate of the first capacitor C1 can be cut off (the third cut-off position shown in fig. 4).
Alternatively, the connecting line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired may be cut by laser.
It should be noted that "high" and "low" in this application refer to two logic states represented by a range of levels at a certain circuit node position, respectively. It is understood that the specific level height range can be set as required in a specific application scenario, and the present invention is not limited thereto.
Based on the same inventive concept, embodiments of the present invention provide a display device including any one of the display panels described above, thereby having advantages of any one of the display panels described above. The display device in this embodiment may be: the display device comprises any product or component with a display function, such as a display, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
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; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. The display panel repairing method is characterized in that the display panel comprises a plurality of pixel units which are arranged in an array mode, and each pixel unit comprises a light-emitting device and a pixel driving circuit; the pixel driving circuit comprises a capacitor and a switch unit; the control end of the switch unit is connected with a driving voltage through the capacitor, the first port of the switch unit is connected with a data signal, the second port of the switch unit is connected with one end of the light-emitting device, and the other end of the light-emitting device is connected with a reference voltage; the switch unit is used for conducting a first port and a second port of the switch unit when a scanning signal connected with the switch unit is effective and the level of the control end is effective, so that the data signal drives the light-emitting device to emit light for display; the display panel repairing method comprises the following steps:
determining a pixel unit to be patched;
and short-circuiting or breaking the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit so as to enable the switch unit in the repaired pixel unit to be in a disconnected state for a long time and darken the pixel unit to be repaired.
2. The method of claim 1, wherein the short-circuiting the connection between the driving voltage and the control terminal of the switching unit in the pixel unit to be repaired comprises:
and breaking down the capacitor in the pixel unit to be repaired to input a control signal in the repaired pixel unit to the control end of the switch unit, so that the switch unit in the repaired pixel unit is in a disconnected state for a long time, and darkening the repaired pixel unit.
3. The method of claim 2, wherein the capacitor comprises a first metal plate and a second metal plate disposed in opposition; the breakdown of the capacitor in the pixel to be repaired comprises:
and welding the first metal plate and the second metal plate of the capacitor through laser to conduct the first metal plate and the second metal plate.
4. The method according to claim 1, wherein a control terminal of the switch unit is connected to a first terminal of the capacitor, and a second terminal of the capacitor is connected to the driving voltage; the step of disconnecting the connection between the driving voltage in the pixel unit to be repaired and the control end of the switch unit comprises the following steps:
and cutting off a connecting line between the control end of the switch unit in the pixel unit to be repaired and the first end of the capacitor so as to block effective signals from being input to the control end of the switch unit in the repaired pixel unit during the light-emitting stage of the pixel unit, so that the switch unit in the repaired pixel unit is in a disconnected state, and darkening the repaired pixel unit.
5. The method according to claim 4, wherein the cutting off the connection line between the control terminal of the switch unit and the first terminal of the capacitor in the pixel unit to be repaired comprises: and cutting off a connecting line between the control end of the switch unit in the pixel unit to be repaired and the first end of the capacitor through laser.
6. The method according to claim 1, wherein a control terminal of the switch unit is connected to a first terminal of the capacitor, and a second terminal of the capacitor is connected to the driving voltage; the disconnecting the connection of the driving voltage to the control terminal of the switching unit includes:
and cutting off a connecting line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired so as to block an effective signal from being input to the control end of the switch unit in the repaired pixel unit during the light emitting stage of the pixel unit, so that the switch unit in the repaired pixel unit is in a disconnected state, and darkening the repaired pixel unit.
7. The method according to claim 6, wherein said cutting off the connection line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired comprises: and cutting off a connecting line between the driving voltage and the second end of the capacitor in the pixel unit to be repaired by laser.
8. A display panel is characterized by comprising a plurality of pixel units which are arranged in an array mode, wherein each pixel unit comprises a light-emitting device and a pixel driving circuit; the pixel unit comprises a light emitting device and a pixel driving circuit; the pixel driving circuit comprises a capacitor and a switch unit; the control end of the switch unit is connected with a driving voltage through the capacitor, the first port of the switch unit is connected with a data signal, the second port of the switch unit is connected with one end of the light-emitting device, and the other end of the light-emitting device is connected with a reference voltage; the switch unit is used for conducting a first port and a second port of the switch unit when a scanning signal connected with the switch unit is effective and the level of the control end is effective, so that the data signal drives the light-emitting device to emit light for display; wherein,
the display panel also comprises a repaired pixel unit, wherein the short circuit or the open circuit between the driving voltage and the control end of the switch unit in the repaired pixel unit enables the switch unit in the repaired pixel unit to be in a disconnected state for a long time, and the repaired pixel unit is darkened.
9. The display panel according to claim 8, wherein the capacitor in the repaired pixel unit is broken down, so that a control signal in the repaired pixel unit is input to the control terminal of the switch unit, and the switch unit in the repaired pixel unit is in an off state for a long time, thereby darkening the repaired pixel unit.
10. The display panel according to claim 8, wherein a first terminal of the capacitor is connected to the control terminal of the switch unit, and a second terminal of the capacitor is connected to the driving voltage.
The connecting line between the control end of the switch unit in the repaired pixel unit and the first end of the capacitor is disconnected; and/or
And the connecting line between the driving voltage and the second end of the capacitor in the repaired pixel unit is disconnected.
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| CN201710850561.4A CN107464525A (en) | 2017-09-19 | 2017-09-19 | A kind of display panel repairing method and display panel |
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Application publication date: 20171212 |