CN111627976B - Organic light emitting display device - Google Patents
Organic light emitting display device Download PDFInfo
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- CN111627976B CN111627976B CN202010663671.1A CN202010663671A CN111627976B CN 111627976 B CN111627976 B CN 111627976B CN 202010663671 A CN202010663671 A CN 202010663671A CN 111627976 B CN111627976 B CN 111627976B
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- 239000000758 substrate Substances 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims abstract description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 12
- 238000001514 detection method Methods 0.000 claims description 10
- 239000003990 capacitor Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 18
- 208000032005 Spinocerebellar ataxia with axonal neuropathy type 2 Diseases 0.000 description 6
- 208000033361 autosomal recessive with axonal neuropathy 2 spinocerebellar ataxia Diseases 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910021421 monocrystalline silicon Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007123 defense Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010295 mobile communication Methods 0.000 description 1
- 230000008707 rearrangement Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
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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
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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]
- G09G3/3266—Details of drivers for scan electrodes
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/10—OLED displays
- H10K59/12—Active-matrix OLED [AMOLED] displays
- H10K59/122—Pixel-defining structures or layers, e.g. banks
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Electroluminescent Light Sources (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Control Of El Displays (AREA)
Abstract
The invention discloses an organic light-emitting display device, which comprises a plurality of pixel units which are arranged in a matrix on a substrate, wherein each pixel unit comprises an anode, a public organic light-emitting layer and a cathode layer which are sequentially arranged on the substrate; a leakage current guiding structure is arranged between the adjacent pixel units, and comprises a conductive layer and a signal connecting layer, wherein the conductive layer is electrically connected with the signal connecting layer; the conductive layer and the common organic light-emitting layer are arranged in electrical contact, signals of each leakage current guiding-out structure are independently controlled, and each signal connection layer is connected to a display driving circuit potential signal of the pixel unit; the organic light emitting display device includes a light emitting stage in which a potential signal of the display driving circuit is transmitted to the signal connection layer.
Description
Technical Field
The present invention relates to the field of organic light emitting display, and more particularly, to an organic light emitting display device.
Background
The conventional micro Organic Light Emitting Display device, such as a silicon-based micro OLED (Organic Light-Emitting Display) device, uses a single crystal silicon chip as a substrate, has a pixel size of 1/10 of that of a conventional Display device, and has a fineness far higher than that of the conventional device, so that the micro Organic Light Emitting Display device can be used for forming a micro Display. The silicon-based OLED micro-display has wide market application space, and is particularly suitable for being applied to helmet displays, stereoscopic display mirrors, glasses type displays and the like. If the system is connected with a mobile communication network, a satellite positioning system and the like, accurate image information can be obtained anywhere and anytime, and the system has very important military value in military applications such as national defense, aviation, aerospace and even individual combat. The micro OLED micro-display can provide high-image-quality video display for mobile information products such as portable computers, wireless Internet browsers, portable DVDs, game platforms, wearable computers and the like. It can be said that the micro silicon-based OLED micro display provides an excellent approach for near-to-eye application (such as helmet display) both in the civil consumption field and industrial application and even military application, and is expected to raise the new trend of near-to-eye display in the military and consumer electronics fields.
The micro silicon-based OLED display device can cause crosstalk problem between adjacent pixel units due to the small pixel size. Referring to fig. 1, a schematic diagram of a micro silicon-based OLED display device in the prior art includes a substrate 10, a plurality of pixel units are disposed on the substrate 10, two pixel units U1 and U2 are shown in the figure, each pixel unit includes an anode 11 disposed on the substrate 10, a pixel defining layer 12 disposed on the anode 11 and located between the pixel units U1 and U2, and the pixel defining layer 12 forms a gentle slope shape due to an etching process. The hole injection layer 13, the hole transport layer 14, and the electron blocking layer 15 formed on the pixel defining layer 12 are all connection structures connecting between the pixel unit regions. An organic light emitting layer 19 disposed in each pixel unit region, a hole blocking layer 16 disposed on the organic light emitting layer 19, an electron transport layer 17 disposed on the hole blocking layer 16, a cathode 18 disposed on the electron transport layer 17, and a connection structure connecting the cathodes 18 between each pixel unit region. Under the structure of the micro-si-based OLED display device shown in fig. 1, display crosstalk between the pixel units U1 and U2 occurs, that is, when the pixel unit U1 has a display signal, a part of display current is transmitted to the pixel unit U2, so that the pixel unit U2 cannot display a predetermined pixel gray scale, which greatly affects the display effect of the micro-si-based OLED display device. Therefore, it is now urgently required to find out the cause of the pixel cell crosstalk and solve it.
Disclosure of Invention
The invention provides an organic light-emitting display device, which comprises a plurality of pixel units which are arranged in a matrix on a substrate, wherein each pixel unit comprises an anode, a public organic light-emitting layer and a cathode layer which are sequentially arranged on the substrate; a leakage current guiding structure is arranged between the adjacent pixel units, and comprises a conductive layer and a signal connecting layer, wherein the conductive layer is electrically connected with the signal connecting layer; the conductive layer and the common organic light-emitting layer are arranged in electrical contact, signals of each leakage current guiding-out structure are independently controlled, and each signal connection layer is connected to a display driving circuit potential signal of the pixel unit; the organic light emitting display device includes a light emitting stage in which a potential signal of the display driving circuit is transmitted to the signal connection layer.
Optionally, the display driving circuit includes a light emitting device and a reset transistor, a source of the reset transistor is connected to the light emitting device, and a first pole of the reset transistor is connected to a reset signal potential; the signal connection layer is connected to a first pole of the reset transistor.
Optionally, the first pole of the reset transistor is multiplexed as the signal connection layer.
Optionally, the organic light emitting display device includes a plurality of data lines arranged along a column direction for providing data signals to a plurality of columns of pixel units, each column of pixel units being connected to the same data line; in the column direction, a plurality of reset signal lines are further arranged for providing reset signals for the pixel units in a plurality of columns, each column of pixel units is connected with the same reset signal line, and meanwhile, the signal connection layer of the drain current guiding-out structure of each column of pixel units is also connected with the same reset signal line.
Optionally, the organic light emitting display device further includes a reset signal writing stage located before the light emitting stage; in the writing stage of the reset signal, the reset transistor is conducted, and the reset signal is transmitted to the anode of the light emitting device; in the light emitting stage, the reset transistor is turned off, the reset signal is unchanged, or the reset signal is adjusted to be a low potential signal, a high potential signal or a floating potential signal.
Optionally, the organic light emitting display device is provided with a detection module, and the detection module is used for detecting that a certain column of the pixel units display high gray scale or low gray scale; when the detection module detects that a certain column of pixel units display high gray scale, a low potential signal is transmitted to a signal connection layer of a drain current guiding structure adjacent to the certain column of pixel units; when the detection module detects that a certain column of pixel units display low gray scale, a high potential signal or a suspension signal potential is transmitted to a signal connection layer of a drain flow guiding structure adjacent to the certain column of pixel units.
Optionally, the display driving circuit includes a light emitting device and a light emission control transistor, a gate of the light emission control transistor is connected to a light emission control signal potential, and a drain of the light emission control transistor is connected to the light emitting device; the signal connection layer is connected to the grid electrode of the light-emitting control transistor and is connected with the light-emitting control signal potential.
Optionally, the organic light emitting display device further includes a data signal writing stage located before the light emitting stage; in a data writing stage of one row of pixel units, the light-emitting control signal is at a high level, and the light-emitting control transistor is disconnected; in the light emitting stage of one row of the pixel units, the light emitting control signal is at a low level, the light emitting control transistor is turned on, and the signal connection layer is connected to the low level.
Optionally, the organic light emitting display device includes a plurality of data lines arranged along a column direction for providing data signals to a plurality of columns of pixel units, each column of pixel units being connected to the same data line; in the row direction, a plurality of light-emitting control signal lines are arranged for providing light-emitting control signals for a plurality of rows of pixel units, each row of pixel units is connected with the same light-emitting control signal line, and meanwhile, the signal connection layer of the drain current leading-out structure of each row of pixel units is also connected with the same light-emitting control signal line.
Optionally, the pixel circuit includes a light emitting device, a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a reset transistor, and a light emission control transistor, and further includes a storage capacitor; the control end of the first transistor is connected with a light-emitting control signal, the first pole is connected with a first power supply signal, and the second pole is connected with the first pole of the driving transistor; the control end of the second transistor is connected with a second scanning signal, the first electrode is connected with a data signal, and the second electrode is connected with the second electrode of the first transistor and the first electrode of the driving transistor; the control end of the third transistor is connected to a second scanning signal, the first electrode and the control end of the driving transistor are connected to a first node, and the second electrode of the driving transistor are connected to a second node; the control end of the fourth transistor is connected to a first scanning signal, the first electrode is connected to a reset signal, and the second electrode is connected to the first node; the control end of the light-emitting control transistor is connected to a light-emitting control signal, the first electrode is connected to the second node, the second electrode is connected to the anode of the light-emitting device, and the third node is connected to the anode of the light-emitting device; the control end of the reset transistor is connected to the second scanning signal, the first electrode is connected to the reset signal, and the second electrode is connected to the third node; an anode of the light emitting device is connected to the third node, and a cathode is connected to a second power signal; a first plate of the storage capacitor is connected to the first power signal and a second plate is connected to the first node.
Optionally, the organic light emitting display device is a silicon-based micro organic light emitting display device.
According to the organic light-emitting display device, the leakage current leading-out structure is connected to the display driving circuit potential signal in the pixel unit, wiring of signal lines is not needed independently, the structure is simple, and the design difficulty of the pixel unit is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following description will briefly explain the drawings needed in the description of the embodiments of the present invention, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the contents of the embodiments of the present invention and these drawings without inventive effort for those skilled in the art.
FIG. 1 is a schematic diagram of a prior art micro-silicon-based OLED display device;
FIG. 2 is a schematic diagram of an organic light emitting display device according to a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a pixel circuit according to a first embodiment of the invention;
FIG. 4 is a timing diagram of a reset signal of the pixel circuit shown in FIG. 3;
fig. 5 is a schematic diagram of a signal connection structure of a drain-deriving structure in the first embodiment;
fig. 6 is a schematic wiring diagram of a data line and a reset signal line of an organic light emitting display device;
FIG. 7 is a schematic diagram of a pixel circuit according to a second embodiment of the invention;
FIG. 8 is a timing diagram of the light emission control signals of the pixel circuit shown in FIG. 7;
fig. 9 is a schematic wiring diagram of a data line and a light emission control signal line of an organic light emitting display device;
fig. 10 is a schematic diagram of a signal connection structure of a drain-deriving structure in the second embodiment.
Detailed Description
In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clear, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to fall within the scope of the invention.
Example 1
Fig. 2 is a schematic cross-sectional view of an organic light-emitting display device according to an embodiment of the present invention, where the organic light-emitting display device includes a plurality of pixel units U arranged in a matrix on a substrate 101, and each pixel unit U includes an anode 105, a common organic light-emitting layer 103, and a cathode layer 104 sequentially disposed on the substrate 101. The common organic light emitting layer 103 includes a plurality of organic film layers, at least one of which is a continuous structure in a space region between the pixel units U and U. A drain lead-out structure is disposed between adjacent pixel units U, and the drain lead-out structure shown in fig. 2 includes a conductive layer 106 and a signal connection layer 107, where the conductive layer 106 is electrically connected with the signal connection layer 107, specifically, the signal connection layer 107 is disposed on a lower layer of the conductive layer 106, an insulating layer 102 is disposed between the signal connection layer 107 and the conductive layer 106, and the signal connection layer 107 and the conductive layer 106 are electrically connected through a via hole 108 disposed in the insulating layer 102. The conductive layer 106 is disposed in electrical contact with the common organic light emitting layer 103, and more specifically, the conductive layer 106 and the common organic light emitting layer 103 are disposed in electrical contact with each other in an organic film layer of a continuous structure in a space region between the pixel units U and 103, and are in direct contact. The signal connection layer 107 is connected to a potential signal of a display driving circuit of the pixel unit. The organic light emitting display device includes a light emitting stage in which a potential signal of the display driving circuit is transmitted to the signal connection layer 107.
Fig. 3 is a schematic diagram of a pixel circuit according to a first embodiment of the present invention, where the pixel circuit includes a light emitting device OLED, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a driving transistor T5, a reset transistor T6, a light emitting control transistor T7, and a storage capacitor Cst. In the first embodiment, the signal connection layer 107 of the drain current guiding structure is connected to the first pole of the reset transistor T6 and is connected to the reset signal potential Vref.
Specifically, the control terminal of the first transistor T1 is connected to the emission control signal Emit, the first pole is connected to the first power signal Vdd, and the second pole is connected to the first pole of the driving transistor T5. The control terminal of the second transistor T2 is connected to the second Scan signal Scan2, the first pole is connected to the data signal data, and the second pole is connected to the second pole of the first transistor T1 and the first pole of the driving transistor T5. The control terminal of the third transistor T3 is connected to the second Scan signal Scan2, the first electrode and the control terminal of the driving transistor T5 are connected at the first node N1, and the second electrode of the driving transistor T5 are connected at the second node N2. The control terminal of the fourth transistor T4 is connected to the first Scan signal Scan1, the first pole is connected to the reset signal Vef, and the second pole is connected to the control terminal of the driving transistor T5, the control terminal of the first transistor T1, and the control terminal of the light emission control transistor T7 at the first node N1. The control terminal of the emission control transistor T7 is also connected to the emission control signal Emit, the first electrode is connected to the second node N2, and the second electrode is connected to the anode of the light emitting device OLED at the third node N3. The control terminal of the reset transistor T6 is connected to the second Scan signal Scan2, the first electrode is connected to the reset signal Vef, and the second electrode is connected to the second electrode of the light emission control transistor T7 and the anode of the light emitting device OLED at the third node N3. The anode of the light emitting device OLED is connected to the third node N3, the cathode is connected to the second power signal Vss, the first plate of the storage capacitor Cst is connected to the first power signal Vdd, and the second plate thereof is connected to the first node N1. In addition, the signal connection layer 107 is connected to the first electrode of the reset transistor T6, and is connected to the reset signal potential Vref.
Fig. 4 is a timing diagram of a reset signal of the pixel circuit shown in fig. 3. The timing of the reset signal includes a reset signal writing stage t11 and a light emitting stage t12. In the reset signal writing stage T11, the second Scan signal Scan2 connected to the control terminal of the reset transistor T6 controls the reset transistor T6 to be turned on, the low level signal of the reset signal Vef is transmitted to the anode of the light emitting device OLED through the reset transistor T6, the anode signal of the light emitting device OLED is pulled down to a low potential, and the anode of the light emitting device OLED is subjected to signal reset to eliminate the influence of the previous frame data signal. In the light emitting period T12, the second Scan signal Scan2 connected to the control terminal of the reset transistor T6 controls the reset transistor T6 to be turned off, the reset signal Vef is no longer transmitted to the anode of the light emitting device OLED, and in the whole light emitting period T12, the reset signal Vef is in an idle state.
Referring to fig. 3 and 5, in the pixel unit, an active layer T63 of a reset transistor T6 and an active layer T73 of a light emission control transistor T7 are provided on a substrate 101, a first insulating layer 109 is provided on an upper layer of the active layer, a control terminal T61 of the reset transistor T6 and a control terminal T71 of the light emission control transistor T7 are provided on the first insulating layer 109, and a second insulating layer 112 is provided on an upper layer of the control terminal. The second insulating layer 112 has a first electrode and a second electrode of the reset transistor T6 and a first electrode and a second electrode of the light emission control transistor T7. A via hole is provided in the first insulating layer 109 and the second insulating layer 112, the first electrode T62 of the reset transistor T6 is connected to the active layer T63 through the via hole 110, and the second electrode is connected to the active layer T63 through the via hole 111. The first electrode of the light emission control transistor T7 is connected to the active layer T73 through the via hole 113, and the second electrode is connected to the active layer T73 through the via hole 114. The first pole of the light emission control transistor T7 is connected to the second node N2, the second pole of the light emission control transistor T7 and the second pole and anode of the reset transistor T6 are connected to the third node N3, and the first pole of the reset transistor T6 is connected to the reset signal Vef.
A third insulating layer 102 is provided on the upper layers of the first and second electrodes, an anode 105 and a conductive layer 106 of a drain lead-out structure are provided on the upper layer of the third insulating layer 102, a via hole is provided in the third insulating layer 102, the conductive layer 106 is electrically connected to the first electrode T62 of the reset transistor T6 through the via hole 108, and the anode 105 is electrically connected to the first electrode of the light emission control transistor T7 through the via hole 115. Preferably, the first pole T62 of the reset transistor T6 is multiplexed as the signal connection layer 107 of the drain current lead-out structure.
The common organic light emitting layer 103 having a whole surface structure is provided on the anode 105 and the conductive layer 106, and the common organic light emitting layer 103 is in electrical contact with the conductive layer 106 having a drain lead-out structure in the space region between the pixel units. A cathode layer 104 is disposed on the upper layer of the common organic light emitting layer 103.
The first electrode T62 of the reset transistor T6 is multiplexed into the signal connection layer 107 of the drain current guiding structure, and the conductive layer 106, the via hole 108, the signal connection layer 107, and the external reset signal Vef form a path, so that the lateral drain current in the common organic light emitting layer 103 between the pixel units can be guided out, and the current is prevented from flowing to the adjacent pixel units, thereby avoiding crosstalk display caused by the lateral drain current.
Referring to fig. 5, a first electrode T62 of the reset transistor T6 is electrically connected to the conductive layer 106 of the drain lead-out structure through a via 108, and provides a reset signal potential Vref to the conductive layer 106 of the drain lead-out structure. In the light-emitting period t12 after the reset signal writing period t11, the potential of the reset signal potential Vref can also be adjusted.
Next, referring to fig. 6, fig. 6 is a schematic layout diagram of data lines and reset signal lines of an organic light emitting display device, wherein an X direction is a row direction and a Y direction is a column direction, and the organic light emitting display device includes a plurality of data lines D disposed on a substrate 101 along the column direction for providing data signals data to a plurality of columns of pixel units, each column of pixel units being connected to a same data line. In the column direction, a plurality of reset signal lines R are further provided for providing reset signals Vef to the pixel units in a plurality of columns, each column of pixel units is connected to the same reset signal line, and meanwhile, the signal connection layer of the drain current guiding structure of each column of pixel units is also connected to the same reset signal line R. The organic light emitting display device is provided with a detection module 150, and the detection module 150 may be disposed in a non-display area of the substrate 101 for detecting whether a pixel unit in a certain column displays a high gray level or a low gray level.
In the light emitting stage t12, when the detection module detects 150 that a pixel unit in a certain column displays a high gray level, a low potential signal is transmitted to the signal connection layer 107 of the drain current guiding structure adjacent to the pixel unit in the certain column, specifically, the reset signal Vef of the reset signal line R connected to the pixel unit in the certain column is adjusted to be a low potential signal. In the light emitting stage t12, when the detection module 150 detects that a pixel unit in a certain column displays a low gray level, a high potential signal or a floating signal potential is transmitted to the signal connection layer 107 of the drain current guiding structure adjacent to the pixel unit in the certain column, and specifically, the reset signal Vef of the reset signal line R connected to the pixel unit in the certain column is adjusted to be the high potential signal or the floating signal potential.
Because at least one organic film layer in the common organic light emitting layer 103 is in a continuous structure in the interval area between the pixel units U and the pixel units, the leakage current in one pixel unit may flow to the adjacent pixel unit, especially when one pixel unit displays high gray scale by high voltage, the leakage current may be transmitted to the adjacent pixel unit displaying low gray scale, and the adjacent pixel unit displaying low gray scale may be peeped and lightened to display undesired gray scale, thereby reducing the display effect. In the first embodiment of the present invention, a drain current guiding structure is disposed between the pixel units, the lateral drain current in the organic film layer flows into the conductive layer 106 of the drain current guiding structure and then is transmitted to the signal connection layer 107 through the via hole 108, and the signal connection layer 107 is connected to the potential signal in the pixel unit, so that the drain current is transmitted from the path and does not flow to the adjacent pixel unit, and the problem of lighting of the adjacent pixel unit is not caused. Meanwhile, since the reset transistor T6 is turned off in the light emitting period T12, a low potential signal is transmitted to the reset signal line, and the display of the pixel cell to which the reset signal line is connected is not affected. In the light emitting stage t12, when the detection module detects that a column of pixel units or a plurality of columns of pixel units display low gray scale, a high potential signal or a floating signal potential is transmitted through a reset signal line of the pixel unit or the pixel units in a certain column, and the high potential signal or the floating signal potential is transmitted to a signal connection layer of a drain lead-out structure adjacent to the pixel unit or the pixel units in the certain column. Meanwhile, since the reset transistor T6 is turned off in the light emitting period T12, a high potential signal or a floating signal potential is transmitted to the reset signal line, and the display of the pixel cell to which the reset signal line is connected is not affected.
It is understood that the pixel circuit is not limited to the structure shown in fig. 3, and other structures of pixel circuits are also applicable to the above-mentioned connection method and the function of deriving the leakage current.
According to the organic light-emitting display device provided by the embodiment of the invention, the potentials of the adjacent drain-flow guiding structures of the pixel units in different columns can be independently controlled, different potentials of the adjacent drain-flow guiding structures of the pixel units in different columns can be given according to the gray scale condition of the pixel units in each column in actual display, the transverse drain flow among the pixel units can be better restrained, and the display effect is improved. And the leakage current leading-out structure is connected to the reset signal in the pixel unit, so that the wiring of a signal wire is not required to be independently carried out, the structure is simple, and the design difficulty of the pixel unit is reduced.
Example two
Referring to fig. 7 to 10, fig. 7 is a schematic diagram of a pixel circuit according to a second embodiment, fig. 8 is a timing diagram of a light emission control signal of the pixel circuit shown in fig. 7, and fig. 9 is a wiring diagram of a data line and a light emission control signal line of an organic light emitting display device; fig. 10 is a schematic diagram of a signal connection structure of a drain-deriving structure in the second embodiment.
The pixel circuit shown in fig. 7 includes a light emitting device OLED, a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a driving transistor T5, a reset transistor T6, and a light emission control transistor T7, and further includes a storage capacitor Cst. The pixel circuit structure shown in fig. 7 is basically the same as that of the first embodiment, and is different in that, in the second embodiment, the signal connection layer of the drain current deriving structure is connected to the light emission control signal potential.
As shown in fig. 8, the timing of the light emission control signal includes a data signal writing stage t21 and a light emission time t22. In the data signal writing stage T21, the emission control signal Emit is at a high level, which controls the first transistor T1 and the emission control transistor T7 to be turned off, and at this time, the second Scan signal Scan2 is at a low level, which controls the second transistor T2 to be turned on, and the data signal data is written. At the light emission time T22, the light emission control signal Emit is always at a low level, and controls the first transistor T1 and the light emission control transistor T7 to be turned on, and at this time, the driving transistor T5 is also in a turned-on state, and the light emitting device OLED starts to Emit light.
In fig. 9, the X direction is a row direction and the Y direction is a column direction, and as shown in fig. 9, the organic light emitting display device includes a plurality of data lines D disposed along the column direction on the substrate 201 for providing data signals data to a plurality of columns of pixel units, each column of pixel units being connected to the same data line. In the row direction, a plurality of emission control signal lines E for supplying emission control signals Emit to a plurality of rows of pixel units, each row of pixel units being connected to the same emission control signal line, are provided.
Meanwhile, each light emission control signal line is also connected to the signal connection layer of the drain-out structure of the pixel unit of the row adjacent thereto. As shown in fig. 10, a light emission control transistor T7 is disposed on the substrate 201, a control terminal T71 of the light emission control transistor T7 is connected to a light emission control signal, and a first electrode is connected to the third node N3 and electrically connected to the anode 205. The light emission control signal line E and the control terminal T71 of the light emission control transistor T7 are disposed in the same layer, and are connected to the signal connection layer 207 of the drain lead-out structure through the via 209, and the conductive layer 206 of the drain lead-out structure is electrically connected to the signal connection layer 207 through the via 208.
In the data signal writing stage t21, since the light emitting devices OLED of the pixel units have not yet emitted light, no lateral leakage current between the pixel units is generated; at the light emission time t22, the signal connection layer 207 of the drain current guiding structure between the pixel units is a low level signal of the light emission control signal Emit, so that the lateral drain current between the pixel unit rows can be guided away and does not flow to the adjacent pixel units, thereby suppressing the display crosstalk caused by the lateral drain current.
It should be understood that the pixel circuit is not limited to the structure shown in fig. 7, and other structures of pixel circuits are equally applicable to the above-mentioned connection method and the function of deriving the leakage current.
In the organic light emitting display unit provided in the second embodiment, adjacent drain current guiding structures of pixel units in different rows are connected to different light emitting control signal lines, and signals can be provided through the light emitting control signal lines to inhibit lateral drain current among the pixel units, so that the display effect is improved. And the leakage current leading-out structure is connected to the reset signal in the pixel unit, so that the wiring of a signal wire is not required to be independently carried out, the structure is simple, and the design difficulty of the pixel unit is reduced.
Optionally, the organic light-emitting display device provided by the invention is a silicon-based micro organic light-emitting display device, the silicon-based micro organic light-emitting display panel uses a monocrystalline silicon chip as a substrate, the pixel size is 1/10 of that of a traditional display device, the fineness is far higher than that of the traditional device, and the silicon-based micro organic light-emitting display device can be used for forming a micro display. The pixel size is small, so that the lateral leakage flow is more easy to occur, and the structure is arranged between the pixel units of the silicon-based micro organic light-emitting display panel, thereby being beneficial to improving the display effect of the silicon-based micro organic light-emitting display panel.
Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.
Claims (11)
1. An organic light-emitting display device is characterized by comprising a plurality of pixel units which are arranged in a matrix on a substrate, wherein each pixel unit comprises an anode, a public organic light-emitting layer and a cathode layer which are sequentially arranged on the substrate; a leakage current guiding structure is arranged between the adjacent pixel units, and comprises a conductive layer and a signal connecting layer, wherein the conductive layer is electrically connected with the signal connecting layer; the conductive layer and the common organic light-emitting layer are arranged in electrical contact, signals of each leakage current guiding-out structure are independently controlled, and each signal connection layer is connected to a display driving circuit potential signal of the pixel unit;
the organic light emitting display device includes a light emitting stage in which a potential signal of the display driving circuit is transmitted to the signal connection layer;
the signal connection layer receives the luminous control signal potential, the organic luminous display device comprises a plurality of luminous control signal lines, the luminous control signal lines are used for providing luminous control signals for a plurality of rows of pixel units, each row of pixel units is connected with the same luminous control signal line, and the signal connection layer of the leakage current leading-out structure of each row of pixel units is connected with the same luminous control signal line; or, the signal connection layer receives the reset signal potential, and in the light-emitting stage, when detecting that a pixel unit in a certain column displays high gray scale, adjusts the reset signal received by the signal connection layer of the drain current guiding structure adjacent to the pixel unit in the certain column to be a low potential signal; when detecting that a pixel unit in a certain column displays low gray level, the reset signal received by the signal connection layer of the drain current guiding structure adjacent to the pixel unit in the certain column is adjusted to be a high potential signal or a suspension signal potential.
2. The organic light-emitting display device according to claim 1, wherein the display driving circuit includes a light-emitting device and a reset transistor, a source of the reset transistor is connected to the light-emitting device, and a first electrode of the reset transistor is connected to a reset signal potential; the signal connection layer is connected to a first pole of the reset transistor.
3. The organic light-emitting display device according to claim 2, wherein a first pole of the reset transistor is multiplexed as the signal connection layer.
4. The organic light-emitting display device according to claim 2, wherein the organic light-emitting display device includes a plurality of data lines arranged in a column direction for supplying data signals to a plurality of columns of the pixel units, each column of the pixel units being connected to the same data line; in the column direction, a plurality of reset signal lines are further arranged for providing reset signals for the pixel units in a plurality of columns, each column of pixel units is connected with the same reset signal line, and meanwhile, the signal connection layer of the drain current guiding-out structure of each column of pixel units is also connected with the same reset signal line.
5. The organic light-emitting display device according to claim 2, further comprising a reset signal writing stage located before the light-emitting stage;
in the writing stage of the reset signal, the reset transistor is conducted, and the reset signal is transmitted to the anode of the light emitting device; in the light emitting stage, the reset transistor is turned off.
6. The organic light-emitting display device according to claim 5, wherein the organic light-emitting display device is provided with a detection module for detecting whether a column of the pixel units shows a high gray level or a low gray level.
7. The organic light-emitting display device according to claim 1, wherein the display driver circuit includes a light-emitting device and a light-emission control transistor, a gate of the light-emission control transistor is connected to a light-emission control signal potential, and a drain of the light-emission control transistor is connected to the light-emitting device; the signal connection layer is connected with the luminous control signal potential.
8. The organic light-emitting display device according to claim 7, further comprising a data signal writing stage located before the light-emitting stage;
in a data writing stage of one row of pixel units, the light-emitting control signal is at a high level, and the light-emitting control transistor is disconnected; in the light emitting stage of one row of the pixel units, the light emitting control signal is at a low level, the light emitting control transistor is turned on, and the signal connection layer is connected to the low level.
9. The organic light-emitting display device according to claim 7, wherein the organic light-emitting display device includes a plurality of data lines arranged in a column direction for supplying data signals to a plurality of columns of pixel units, each column of pixel units being connected to the same data line.
10. The organic light-emitting display device according to claim 2 or claim 7, wherein the pixel circuit includes a light-emitting device, a first transistor, a second transistor, a third transistor, a fourth transistor, a driving transistor, a reset transistor, and a light-emission control transistor, and further includes a storage capacitor;
the control end of the first transistor is connected with a light-emitting control signal, the first pole is connected with a first power supply signal, and the second pole is connected with the first pole of the driving transistor;
the control end of the second transistor is connected with a second scanning signal, the first electrode is connected with a data signal, and the second electrode is connected with the second electrode of the first transistor and the first electrode of the driving transistor;
the control end of the third transistor is connected to a second scanning signal, the first electrode and the control end of the driving transistor are connected to a first node, and the second electrode of the driving transistor are connected to a second node;
the control end of the fourth transistor is connected to a first scanning signal, the first electrode is connected to a reset signal, and the second electrode is connected to the first node;
the control end of the light-emitting control transistor is connected to a light-emitting control signal, the first electrode is connected to the second node, the second electrode is connected to the anode of the light-emitting device, and the third node is connected to the anode of the light-emitting device;
the control end of the reset transistor is connected to the second scanning signal, the first electrode is connected to the reset signal, and the second electrode is connected to the third node;
an anode of the light emitting device is connected to the third node, and a cathode is connected to a second power signal; a first plate of the storage capacitor is connected to the first power signal and a second plate is connected to the first node.
11. The organic light-emitting display device according to claim 1, wherein the organic light-emitting display device is a silicon-based micro-organic light-emitting display device.
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| CN113178469B (en) | 2021-04-22 | 2023-10-27 | 厦门天马微电子有限公司 | Display panel and display device |
| CN114038360A (en) * | 2021-08-06 | 2022-02-11 | 重庆康佳光电技术研究院有限公司 | Backboard detection circuit, backboard detection method and display device |
| CN113964174B (en) * | 2021-12-16 | 2022-04-19 | 上海视涯技术有限公司 | Organic light-emitting display panel and organic light-emitting display device |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109728068A (en) * | 2019-02-28 | 2019-05-07 | 上海天马有机发光显示技术有限公司 | A kind of array substrate, its driving method and display device |
| CN110603642A (en) * | 2017-05-17 | 2019-12-20 | 苹果公司 | Organic light emitting diode display with reduced lateral leakage |
| CN110634922A (en) * | 2019-09-24 | 2019-12-31 | 昆山国显光电有限公司 | Display panel and display device |
| CN212303671U (en) * | 2020-07-10 | 2021-01-05 | 上海视涯技术有限公司 | Organic light emitting display device provided with leakage current lead-out structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102525501B1 (en) * | 2016-05-23 | 2023-04-24 | 엘지디스플레이 주식회사 | Organic light emitting display device |
-
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- 2020-07-10 CN CN202010663671.1A patent/CN111627976B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110603642A (en) * | 2017-05-17 | 2019-12-20 | 苹果公司 | Organic light emitting diode display with reduced lateral leakage |
| CN109728068A (en) * | 2019-02-28 | 2019-05-07 | 上海天马有机发光显示技术有限公司 | A kind of array substrate, its driving method and display device |
| CN110634922A (en) * | 2019-09-24 | 2019-12-31 | 昆山国显光电有限公司 | Display panel and display device |
| CN212303671U (en) * | 2020-07-10 | 2021-01-05 | 上海视涯技术有限公司 | Organic light emitting display device provided with leakage current lead-out structure |
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