CN112750400B - Voltage compensation structure of display substrate - Google Patents
Voltage compensation structure of display substrate Download PDFInfo
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- CN112750400B CN112750400B CN202011644625.3A CN202011644625A CN112750400B CN 112750400 B CN112750400 B CN 112750400B CN 202011644625 A CN202011644625 A CN 202011644625A CN 112750400 B CN112750400 B CN 112750400B
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- 239000000758 substrate Substances 0.000 title claims abstract description 72
- 230000000903 blocking effect Effects 0.000 claims abstract description 54
- 239000010410 layer Substances 0.000 claims description 147
- 239000011229 interlayer Substances 0.000 claims description 14
- 238000002161 passivation Methods 0.000 claims description 11
- 238000000034 method Methods 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- 230000003287 optical effect Effects 0.000 description 11
- 239000003086 colorant Substances 0.000 description 5
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- 238000006243 chemical reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
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- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
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- 230000005684 electric field Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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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]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
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Abstract
The invention provides a voltage compensation structure of a display substrate, which comprises a substrate, a light blocking plate, a grid power supply, an auxiliary power supply and a pixel light source, wherein the light blocking plate is arranged on the substrate and is electrically connected with a flat cable of the power supply; the grid power supply and the auxiliary power supply are arranged above the light-blocking plate, and the auxiliary power supply is electrically connected with the light-blocking plate; the pixel light source is arranged above the grid power supply and is electrically connected with the grid power supply. The technical scheme of the invention relates to the technical field of OLED display, and the auxiliary power supply is connected to the light blocking plate to improve the voltage value of the light blocking plate, so that the voltage of the light blocking plate is compensated in the process of electrically connecting the light blocking plate and a power supply flat cable, the voltages of power supplies at different positions for driving the pixel light source are the same, and the problem of uneven display brightness caused by uneven voltage at positions far away from and near the power supply is avoided.
Description
Technical Field
The invention relates to the technical field of OLED display, in particular to a voltage compensation structure of a display substrate.
Background
An OLED (organic light-Emitting Diode), also called an organic electroluminescent Display, an organic light-Emitting semiconductor (OLED). The OLED is a current-type organic light emitting device, and emits light by injection and recombination of carriers, and the intensity of light emission is proportional to the injected current. Under the action of an electric field, holes generated by an anode and electrons generated by a cathode move, are respectively injected into a hole transport layer and an electron transport layer, and migrate to a light emitting layer. When the two meet at the light emitting layer, energy excitons are generated, thereby exciting the light emitting molecules to finally generate visible light. However, in the prior art, as the size of the display screen is larger, the voltage on the driving circuit at a position far away from the power supply and a position close to the power supply is not uniform, and the display brightness is not uniform.
Disclosure of Invention
The invention mainly aims to provide a voltage compensation structure of a display substrate, and aims to solve the technical problem of uneven display brightness caused by uneven voltage at positions far away from a grid and close to the grid in the prior art.
In order to achieve the above object, the present invention provides a voltage compensation structure for a display substrate, the voltage compensation structure for a display substrate includes a substrate, a light blocking plate, a gate power supply, an auxiliary power supply and a pixel light source, wherein the light blocking plate is disposed on the substrate and electrically connected to a flat cable of the power supply; the grid power supply and the auxiliary power supply are arranged above the light-blocking plate, and the auxiliary power supply is electrically connected with the light-blocking plate; the pixel light source is arranged above the grid power supply and is electrically connected with the grid power supply.
Optionally, the gate power supply includes a gate, a source drain, and an active layer, the gate and the source drain are disposed above the active layer, a gate insulating layer is disposed between the gate and the active layer, the source drain is electrically connected to the active layer, and the pixel light source is electrically connected to the source drain.
Optionally, the display substrate voltage compensation structure further includes an interlayer insulating layer disposed on the gate electrode and the active layer to cover the gate electrode and the active layer.
Optionally, the display substrate voltage compensation structure further includes a passivation layer disposed on the auxiliary power supply and the source and drain electrodes to wrap the auxiliary power supply and the source and drain electrodes between the passivation layer and the interlayer insulating layer.
Optionally, the display substrate voltage compensation structure further includes a buffer layer, the buffer layer is disposed above the light blocking plate, a through groove is disposed on the buffer layer, and the auxiliary power supply passes through the through groove and is electrically connected to the light blocking plate.
Optionally, the display substrate voltage compensation structure further includes a flat layer disposed on the substrate and covering the light blocking plate, the gate power supply, and the auxiliary power supply, and the pixel light source is disposed on the flat layer.
Optionally, the display substrate voltage compensation structure further includes a bank disposed between the pixel light source and the flat layer, wherein the bank and the light blocking plate are disposed in an overlapping manner in a direction perpendicular to the substrate.
Optionally, a plurality of light blocking plates are arranged on the substrate, the light blocking plates are arranged at intervals, a light emitting surface is formed between every two adjacent light blocking plates, and light beams of the pixel light source are emitted from the light emitting surface.
Optionally, the pixel light source includes an organic light source and a quantum layer disposed on a side of the organic light source facing the substrate and electrically connected to the organic light source; the quantum layer is positioned above the light-emitting surface, and light beams emitted by the organic light source penetrate through the quantum layer to convert the color of the light beams.
Optionally, the voltage compensation structure of the display substrate further includes an optical filter disposed on the substrate, wherein the quantum layer and the optical filter are disposed along a direction perpendicular to the substrate.
In the technical scheme of the invention, the auxiliary power supply is connected to the light blocking plate to improve the voltage value of the light blocking plate, so that the voltage of the light blocking plate is compensated in the process of electrically connecting the light blocking plate and a power supply flat cable, the voltages of the power supplies at different positions for driving the pixel light sources are the same, and the problem of uneven display brightness caused by uneven voltage at positions far away from the power supply and close to the power supply is solved.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the embodiments or technical solutions of the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a display substrate voltage compensation structure according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a voltage compensation structure for a display substrate according to the present invention;
FIG. 3 is a schematic diagram of another embodiment of a voltage compensation structure for a display substrate according to the present invention.
The reference numbers illustrate:
| reference numerals | Name(s) | Reference numerals | Name (R) |
| 10 | |
11 | |
| 12 | Source and |
13 | Active layer |
| 14 | |
20 | |
| 30 | |
40 | Pixel light source |
| 50 | |
60 | |
| 70 | |
80 | |
| 90 | Embankment part | 100 | |
| 110 | |
120 | Substrate |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a voltage compensation structure of a display substrate, please refer to fig. 1, which comprises a substrate 120, a light blocking plate 20, a grid power supply 10, an auxiliary power supply 30 and a pixel light source 40, wherein the light blocking plate 20 is arranged on the substrate 120, and the light blocking plate 20 is electrically connected with a power supply flat cable; the grid power supply 10 and the auxiliary power supply 30 are arranged above the light blocking plate 20, and the auxiliary power supply 30 is electrically connected with the light blocking plate 20; the pixel light source 40 is disposed above the gate power supply 10, and the pixel light source 40 is electrically connected to the gate power supply 10.
In this embodiment, the substrate 120 serves as an upper substrate, and when the display substrate voltage compensation structure is mounted on a display device, the upper substrate is used for being mounted on a display screen side of the display device, and the pixel light source 40 is disposed on a back panel side of the display device, that is, the display device assembled by the display substrate voltage compensation structure performs display in a back-illuminated manner. The light blocking plate 20 is externally connected to a bus bar of an external power source, thereby providing basic power for the display substrate 120; the pixel light source 40 is electrically connected to the gate power supply 10, so as to adjust the current magnitude of the pixel light source 40.
Specifically, in practical applications, the display substrate 120 is formed by a plurality of pixel light sources 40, one pixel light source 40 can form sub-pixels with different colors, such as red, green, and blue colors, which are also called red light pixels, blue light pixels, or green light pixels (RGB pixels), and the placement sequence of the red light pixels, the blue light pixels, and the green light pixels can be adjusted, that is, the predetermined sequence is the red light pixels, the blue light pixels, and the green light pixels, or the blue light pixels, the red light pixels, and the green light pixels, and the like, sequentially from left to right. The number of the red pixels, the blue pixels and the green pixels is at least one. In this embodiment, in order to meet the requirement of the user, the number of the red pixels, the blue pixels, and the green pixels may be adjusted, for example, two red pixels, one green pixel, and one blue pixel may be set; or one red pixel, one blue pixel, three green pixels and the like. Therefore, the display brightness, the color saturation and the like of the OLED display are changed, and the compatibility of the OLED display is improved.
The sub-pixels of different colors emit light by the organic light source, and light beams (color light) emitted from the red pixel, the blue pixel, and the green pixel are added at different luminance ratios to generate light beams of various colors. When a plurality of the pixel light sources 40 are arranged in a matrix manner and emit light beams of different colors to cooperate with each other, the purpose of displaying different image information is achieved. The pixel light sources 40 of each color are separated by the light blocking plates 20, specifically, the substrate 120 is provided with a plurality of light blocking plates 20, the plurality of light blocking plates 20 are arranged at intervals, a light emitting surface is formed between two adjacent light blocking plates 20, and light beams of the pixel light sources 40 are emitted from the light emitting surface. The light blocking plate 20 is electrically connected to a flat cable of an external power source to supply power to the pixel light source 40.
In the technical scheme of the invention, the auxiliary power supply 30 is connected to the light blocking plate 20 to increase the voltage value of the light blocking plate 20, so that the voltage of the light blocking plate 20 is compensated in the process of electrically connecting the light blocking plate 20 with a power flat cable, the voltages of the pixel light sources 40 driven by the power supplies at different positions are the same, and the problem of uneven display brightness caused by uneven voltage at positions far away from and near the power supplies is avoided.
Specifically, the Gate power supply 10 includes a Gate 11(Gate), a source drain 12(SD) and an active layer 13(ACT, IGZO), the Gate 11 and the source drain 12 are disposed above the active layer 13, a Gate insulating layer 14(GI) is disposed between the Gate 11 and the active layer 13, the source drain 12 is electrically connected to the active layer 13, and the pixel light source 40 is electrically connected to the source drain 12. The gate insulating layer 14 isolates the gate electrode 11 from the active layer 13 to prevent the gate power supply 10 from being short-circuited or open-circuited, a Cathode layer (Cathode AL) is disposed on the pixel power supply, the Cathode layer is electrically connected to the source and drain electrodes 12, and the light blocking plate 20 is electrically connected to a bus bar of an external power supply to supply power to an anode of the pixel light source 40, so that the pixel light source 40 is turned on.
In the above process, the plurality of pixel light sources 40 are arranged in a matrix manner, and after being connected in parallel, a plurality of horizontal row pixel light sources 40 and a plurality of column pixel light sources 40 are formed, and the plurality of horizontal row pixel light sources 40 and the plurality of column pixel light sources 40 are interlaced to form a net. When driving, the on-state voltages of the pixel light sources 40 or the pixel light sources 40 in the same horizontal row are the same, however, in some large-sized display substrates 120, the pixel light sources 40 in the same column are different in distance from the power supply, the wires from the pixel light sources 40 close to the power supply are shorter, the resistance is smaller, the wires from the pixel light sources 40 far from the power supply to the power supply are longer, and the resistance is larger, so that the voltages shared by the pixel light sources 40 in different positions are not uniform, and the brightness is not uniform. Therefore, in this embodiment, each of the light blocking plates 20 is connected to an independent auxiliary power supply 30(Vdd auxiliary power supply) to compensate the voltage of the pixel light sources 40 connected thereto, so as to ensure that the voltages shared by the pixel light sources 40 at any position are the same, ensure uniformity of brightness, and improve display effect.
Further, the voltage compensation structure of the display substrate further includes an interlayer insulating layer 50(ILD), wherein the interlayer insulating layer 50 is disposed on the gate electrode 11 and the active layer 13 to cover the gate electrode 11 and the active layer 13, so as to separate the gate electrode 11 from the source drain electrode 12, and it can be understood that the interlayer insulating layer 50 may extend to the edge of the active layer 13 along the surface of the substrate 120, and then extend to the surface of the active layer 13 until the gate electrode 11 is completely covered, that is, the interlayer insulating layer 50 may completely cover the entire substrate 120 to completely cover the active layer 13 and the gate electrode 11, so as to prevent the gate electrode 11 and the source drain electrode 12 from being short-circuited, and meanwhile, a via hole or a pad hole is disposed on the interlayer insulating layer 50 for connecting the source drain electrode 12 to the active layer 13 through the via hole or the pad hole, thereby ensuring the normal operation of the gate power supply 10. Meanwhile, the voltage compensation structure of the display substrate further includes a passivation layer 60(PAS), and the passivation layer 60 is disposed on the auxiliary power supply 30 and the source/drain electrode 12, so as to wrap the auxiliary power supply 30 and the source/drain electrode 12 between the passivation layer 60 and the interlayer insulating layer 50. The passivation layer 60 can cover the whole interlayer insulating layer 50, so that the auxiliary power supply 30 and the source and drain electrodes 12 are wrapped between the interlayer insulating layer 50 and the passivation layer 60, contact between the auxiliary power supply 30 and an external element is avoided, short circuit risk of the grid power supply 10 or the auxiliary power supply 30 is reduced, and stability is improved. It should be noted that the interlayer insulating layer 50 and the passivation layer 60 are made of transparent materials, so as to ensure that the light beam of the pixel light source 40 can be emitted from the light emitting surface, and ensure that the display substrate 120 displays normally.
Further, the voltage compensation structure of the display substrate further includes a buffer layer 70(buffer), the buffer layer 70 is disposed above the light blocking plate 20, a through groove is disposed on the buffer layer 70, and the auxiliary power supply 30 passes through the through groove and is electrically connected to the light blocking plate 20. The buffer layer 70 may protect the auxiliary power supply 30 and the gate power supply 10, and when an external force is applied to the display substrate 120, the buffer layer 70 may buffer the external force, thereby protecting the inside from being damaged.
Specifically, the voltage compensation structure of the display substrate further includes a planarization layer 80(OC), the planarization layer 80 is disposed on the substrate 120 and covers the light blocking plate 20, the gate power supply 10 and the auxiliary power supply 30, and the pixel light source 40 is disposed on the planarization layer 80. In order to ensure uniformity of the brightness of the pixel light sources 40 when the pixel light sources 40 emit light, the pixel light sources 40 are disposed flatly, or the pixel light sources 40 are disposed parallel to the display screen. However, the auxiliary power supply 30 and the gate power supply 10 are composed of a plurality of components, and the surfaces thereof are uneven, so that a flat setting platform is provided for the pixel light source 40 by arranging the flat layer 80 on the auxiliary power supply 30 and the gate power supply 10, thereby ensuring the flatness of the pixel light source 40 and improving the uniformity of the brightness thereof.
Further, the display substrate voltage compensation structure further includes a Bank 90(Bank), wherein the Bank 90 is disposed between the pixel light source 40 and the flat layer 80, and the Bank 90 and the light blocking plate 20 are disposed to overlap in a direction perpendicular to the substrate 120. The dam portion 90 is made of an insulating material, two adjacent pixel light sources 40 are separated by the dam portion 90, and two adjacent pixel light sources 40 can be independently driven, that is, only a red pixel or a blue pixel, etc. is turned on; in addition, since the light emitting efficiency and the light emitting life of each color pixel are different, in order to ensure the uniformity of the light, the light emitting efficiency of the red light pixel, the light emitting efficiency of the blue light pixel, the light emitting efficiency of the green light pixel, and the light emitting efficiency of the white light pixel need to be the same, and the light emitting efficiencies of the red light pixel, the blue light pixel, and the white light pixel are different from each other, in this embodiment, the shape of the bank 90 is changed to indirectly change the installation manner of each sub-pixel in the pixel light source 40, for example, a plurality of red light pixels, green light pixels, and blue light pixels are arranged in a triangular manner, or arranged in a rectangular manner, or arranged in a circular manner, so as to specify the shape and the size of the pixel light source 40.
Specifically, the pixel light source 40 includes an organic light source and a quantum layer 100, wherein the quantum layer 100 is disposed on one side of the organic light source facing the substrate 120 and is electrically connected to the organic light source; the quantum layer 100 is located above the light exit surface, and the light beam emitted by the organic light source passes through the quantum layer 100 to change the color of the light beam. When the light beam emitted by the organic light source passes through the quantum layer 100, the quantum layer 100 may convert the color of the light beam emitted by the organic light source, for example, when the quantum layer 100 is a red quantum layer, the color of the light beam emitted by the organic light source is converted into red, thereby forming a red pixel; when the quantum layer 100 is a green quantum layer, the color of the light beam emitted from the organic light source is converted into green, thereby forming a green pixel; in practical applications, since the conversion efficiency of the blue light beam is high, in this embodiment, it is not necessary to provide a blue quantum layer to convert the light beam emitted by the organic light source, and only the blue filter 110 is provided to filter the light beam into the blue light beam, thereby reducing the production cost of the OLED display. Meanwhile, the quantum layer 100 can be used to improve the conversion efficiency of the light beam emitted by the organic light source, thereby indirectly improving the light emitting efficiency of the organic light source and making the color brighter.
Further, the display substrate voltage compensation structure further includes an optical filter 110, where the optical filter 110 is disposed on the substrate 120, and the quantum layer 100 and the optical filter 110 are disposed along a direction perpendicular to the substrate 120. In order to further improve the Color reproducibility of the light beam, a Filter 110 (C/F) may be further used, where the Filter 110 is disposed on the substrate 120, and the quantum layer 100 and the Filter 110 are disposed along a direction perpendicular to the substrate 120, that is, after the light beam passes through the quantum layer 100, the light beam passes through the Filter 110 to improve the Color reproducibility of the light beam. It should be noted that, the color of the optical filter 110 is the same as the color of the quantum layer 100, that is, when the quantum layer 100 is red, the optical filter 110 is a red optical filter, so that after the red light beam passing through the red quantum layer passes through the red optical filter again, the color reproducibility is higher, and the display effect is further improved.
It should be noted that the organic light source may adopt a white light source or a blue light source. As an embodiment, when the organic light source is a white light source, that is, the color of the light beam emitted by the organic light source is white, specifically, the white light source includes a Yellow-Green emitting layer (Yellow-Green EML) and two Blue emitting layers (Blue EML), and the Yellow-Green emitting layer is disposed between the two Blue emitting layers so that the light beams emitted by the Yellow-Green emitting layer and the two Blue emitting layers are superimposed to form a white light beam. In addition, the white light source also comprises an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), a positive charge generation layer (P.CGL), a negative charge generation layer (n.CGL) and the like, and the white light source can realize the light emitting function after being combined in a specific mode.
When the white light source is used as a light source, in order to realize that the sub-pixel emits a red light beam (i.e., the red light pixel is formed), the red quantum layer may be used to cover the white light source, so that the color of the light beam transmitted through the red quantum layer is converted into red, and the red light pixel is formed. In addition, in order to further improve the Color reproducibility of the light beam, a Filter 110 (C/F) may be used, and the Filter 110 is disposed on the substrate 120.
Similarly, in order to realize that the sub-pixel emits a green light beam (i.e., forms the green pixel), the green quantum layer may be used to cover the white light source, so that the color of the light beam transmitted through the green quantum layer is converted into green, thereby forming the green pixel. In addition, as in the red pixel, a green filter may be used to further improve the color reproducibility of the light beam, and it is only necessary to ensure that the color of the filter 110 is consistent with the color of the quantum layer 100.
It should be noted that, in practical applications, since the conversion efficiency of the blue light beam is high, in the embodiment, referring to fig. 2, it is not necessary to convert the light beam emitted by the white light source by disposing a blue quantum layer, and only a blue filter is disposed to filter the light beam into the blue light beam.
When the organic light source is a white light source, the quantum layer 100 and the filter 110 may not be provided so that the sub-pixel emits a white light beam, and the white light beam may directly transmit through the display panel to be emitted (see fig. 3).
As another embodiment, when the organic light source may be a Blue light source, that is, a color of a light beam emitted by the organic light source is Blue, specifically, the Blue light source includes at least three Blue light emitting layers (Blue EMLs), and in addition, the white light source further includes an Electron Transport Layer (ETL), an Electron Injection Layer (EIL), a Hole Transport Layer (HTL), a positive charge generation layer (p.cgl), a negative charge generation layer (n.cgl), and the like, and the light emitting function is realized by combining specific modes.
When the blue light source is used as the light source, similarly, in order to realize that the sub-pixel emits a red light beam (i.e., forms the red light pixel), the red quantum layer may be used to cover the blue light source, so that the color of the light beam passing through the red quantum layer is converted into red, and the red light pixel is formed. In addition, in order to further improve the Color reproducibility of the light beam, a Filter 110 (C/F) may be used, and the Filter 110 is disposed on the substrate 120.
Similarly, in order to realize that the sub-pixel emits a green light beam (i.e., forms the green pixel), the green quantum layer may be used to cover the blue light source, so that the color of the light beam transmitted through the green quantum layer is changed into green, thereby forming the green pixel.
It can be understood that, different from the white light source, the blue light source capable of emitting the blue light beam is adopted, and in practical application, the light emitting efficiency of the blue light beam is high, so that the quantum layer 100 and the optical filter 110 (see fig. 3) do not need to be disposed in this embodiment, that is, the light beam emitted by the blue light source directly passes through the glass substrate to be emitted.
However, when the blue light source is used, a green light emitting layer may be further disposed in the blue light source to adjust color parameters of light beams, so that the blue light source is applicable to more different application scenarios, specifically, the blue light source further includes a green light emitting layer disposed between any two adjacent blue light emitting layers, the number of the green light emitting layers may be one or more, and the green light emitting layers may be specifically adjusted according to different requirements, so as to improve compatibility of the OLED display.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (8)
1. A display substrate voltage compensation structure, comprising:
a bank portion;
a substrate;
the light blocking plate is arranged on the substrate and is electrically connected with a flat cable of a power supply;
the grid power supply and the auxiliary power supply are arranged above the light blocking plate, and the auxiliary power supply is electrically connected with the light blocking plate;
the pixel light source is arranged above the grid power supply and is electrically connected with the grid power supply;
the grid power supply comprises a grid, a source drain and an active layer, the grid and the source drain are arranged above the active layer, a grid insulating layer is arranged between the grid and the active layer, the source drain is electrically connected with the active layer, the pixel light source is electrically connected with the source drain, a cathode layer is arranged on the pixel light source, the cathode layer is electrically connected with the source drain, and the light blocking plate is electrically connected with a flat cable of the power supply to be used as an anode of the pixel light source for supplying power;
the auxiliary power supply and the grid power supply are arranged right below the dike part at intervals;
the display substrate voltage compensation structure further comprises a buffer layer, the buffer layer is arranged above the light blocking plate, a through groove is formed in the buffer layer, and the auxiliary power supply penetrates through the through groove to be electrically connected with the light blocking plate; each light blocking plate is connected with an independent auxiliary power supply so as to compensate the voltage of the pixel light source correspondingly connected with the light blocking plate.
2. The display substrate voltage compensation structure of claim 1, further comprising an interlayer insulating layer disposed on the gate electrode and the active layer to cover the gate electrode and the active layer.
3. The display substrate voltage compensation structure of claim 2, further comprising a passivation layer disposed on the auxiliary power supply and the source and drain electrodes to wrap the auxiliary power supply and the source and drain electrodes between the passivation layer and the interlayer insulating layer.
4. The voltage compensation structure of claim 1, further comprising a planarization layer disposed on the substrate and covering the light blocking plate, the gate power supply and the auxiliary power supply, wherein the pixel light source is disposed on the planarization layer.
5. The voltage compensation structure of claim 4, wherein the bank is disposed between the pixel light source and the planarization layer, wherein the bank and the light blocking plate are overlapped in a direction perpendicular to the substrate.
6. The voltage compensation structure of claim 1, wherein a plurality of the light blocking plates are disposed on the substrate, the plurality of light blocking plates are disposed at intervals, a light emitting surface is formed between two adjacent light blocking plates, and light beams of the pixel light sources are emitted from the light emitting surface.
7. The voltage compensation structure of claim 6, wherein the pixel light source comprises:
an organic light source;
a quantum layer disposed on a side of the organic light source facing the substrate and electrically connected to the organic light source;
the quantum layer is positioned above the light-emitting surface, and light beams emitted by the organic light source penetrate through the quantum layer to convert the color of the light beams.
8. The display substrate voltage compensation structure of claim 7, further comprising a filter disposed on the substrate, wherein the quantum layer and the filter are disposed in a direction perpendicular to the substrate.
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| KR102061115B1 (en) * | 2013-02-26 | 2020-01-02 | 삼성디스플레이 주식회사 | Organic Light Emitting Display |
| CN109037273B (en) * | 2017-06-08 | 2020-06-09 | 京东方科技集团股份有限公司 | Organic light emitting diode array substrate, preparation method thereof and display device |
| CN107863373A (en) * | 2017-10-31 | 2018-03-30 | 昆山国显光电有限公司 | Display panel and terminal |
| CN108470749A (en) * | 2018-03-07 | 2018-08-31 | 深圳市华星光电半导体显示技术有限公司 | Display panel and its manufacturing method |
| US11545540B2 (en) * | 2018-04-02 | 2023-01-03 | Beijing Boe Technology Development Co., Ltd. | Array substrate, display apparatus, method of reducing current-resistance drop and data loss in display apparatus, and method of fabricating array substrate |
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| CN107230692A (en) * | 2016-03-25 | 2017-10-03 | 三星显示有限公司 | Organic light-emitting display device including layered structure |
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