CN114613325B - Display substrate and display device - Google Patents
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- CN114613325B CN114613325B CN202210156197.2A CN202210156197A CN114613325B CN 114613325 B CN114613325 B CN 114613325B CN 202210156197 A CN202210156197 A CN 202210156197A CN 114613325 B CN114613325 B CN 114613325B
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- 239000000758 substrate Substances 0.000 title claims abstract description 75
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- 238000001514 detection method Methods 0.000 abstract description 7
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- 229920001621 AMOLED Polymers 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
-
- 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
- G09G3/2007—Display of intermediate tones
- G09G3/2074—Display of intermediate tones using sub-pixels
Abstract
The embodiment of the disclosure provides a display substrate and a display device, and belongs to the technical field of display. The display substrate includes a plurality of switch circuit groups, each switch circuit group including a plurality of switch circuits. Each switch circuit is used for transmitting the data signal provided by the coupled data transmission line to the sub-pixel through the coupled data line based on the signal provided by the coupled switch control line so as to light the sub-pixel. In each switch circuit group, each switch circuit is coupled with the same color sub-pixels through each data line positioned at the same layer, and each switch circuit is coupled with different data transmission lines and/or switch control lines. In this way, each switch circuit in each switch circuit group can transmit different data signals to each data line which is located in the same layer and is coupled to the same color sub-pixel. Furthermore, when the data lines are short-circuited, the coupled sub-pixels have different luminous brightness, so that the reliable detection of the luminous abnormality caused by the short circuit of the data lines is realized.
Description
Technical Field
The disclosure relates to the technical field of display, and in particular relates to a display substrate and a display device.
Background
Organic light-emitting diode (OLED) display substrates are widely used in various display devices due to their self-luminescence, fast response speed, wide viewing angle, and the like.
Disclosure of Invention
The embodiment of the disclosure provides a display substrate and a display device, which can solve the problem that the light-emitting abnormality caused by the short circuit of data lines coupled with sub-pixels with the same color cannot be reliably detected in the related art.
The technical scheme is as follows:
in one aspect, there is provided a display substrate including:
a substrate having a display region and a non-display region at least partially surrounding the display region;
a plurality of subpixels of different colors located in the display area;
a plurality of data lines in the display region and the non-display region, the plurality of data lines coupled to the plurality of sub-pixels and configured to provide data signals to the plurality of sub-pixels;
and a plurality of first switch control lines, a plurality of data transmission lines and a plurality of switch circuit groups, each of the switch circuit groups including a plurality of switch circuits, each of the switch circuits being coupled to one of the first switch control lines, one of the data transmission lines and one of the data lines, respectively, and being configured to transmit data signals provided by the data transmission lines to the data lines in response to first switch control signals provided by the first switch control lines, each of the switch circuits being coupled to a different one of the data lines;
at least two data lines in the plurality of data lines are positioned on different layers, and at least two data lines coupled with sub-pixels with the same color are positioned on the same layer; in each switch circuit group, each switch circuit is coupled with the sub-pixels with the same color through a data line, the data lines coupled with each switch circuit are positioned on the same layer, each switch circuit is coupled with different target signal lines, and each target signal line comprises at least one of the data transmission line and the first switch control line.
Optionally, each data line coupled to the same color sub-pixel is located at the same layer, and each data line coupled to different color sub-pixels is located at a different layer;
in each switch circuit group, each switch circuit is coupled with each adjacent data line.
Optionally, the target signal line is the data transmission line;
in each switch circuit group, each switch circuit is coupled with the same first switch control line.
Optionally, the target signal line is the first switch control line;
in each switch circuit group, each switch circuit is coupled with the same data transmission line.
Optionally, each of the switching circuits includes: a first switching transistor;
the grid electrode of the first switch transistor is coupled with the first switch control line, the first pole of the first switch transistor is coupled with the data transmission line, and the second pole of the first switch transistor is coupled with the data line.
Optionally, the display substrate further includes:
and a plurality of second switch control lines located in the non-display area, each switch circuit is further coupled to one second switch control line, and each switch circuit is used for responding to the first switch control signal provided by the first switch control line and the second switch control signal provided by the second switch control line and transmitting the data signal provided by the data transmission line to the data line.
Optionally, each of the switching circuits includes: a first switching transistor and a second switching transistor;
a gate of the first switching transistor is coupled to the first switching control line, a first pole of the first switching transistor is coupled to the data transmission line, and a second pole of the first switching transistor is coupled to a first pole of the second switching transistor;
the gate of the second switching transistor is coupled to the second switching control line, and the second pole of the second switching transistor is coupled to the data line.
Optionally, the first switch control line, the second switch control line and the data transmission line are shared among the switch circuit groups coupled to the same color sub-pixels through data lines.
Optionally, each of the switch circuit groups includes: two of the switching circuits.
In another aspect, there is provided a display device including: a power supply assembly and a display substrate as described in the above aspects;
the power supply assembly is coupled with the display substrate and is used for supplying power to the display substrate.
In summary, the beneficial effects brought by the technical solution provided by the embodiments of the present disclosure at least may include:
a display substrate and a display device are provided. The display substrate includes a plurality of switch circuit groups, each switch circuit group including a plurality of switch circuits. Each switch circuit is respectively coupled with the switch control line and the data transmission line and is coupled with the sub-pixel through the data line, and each switch circuit can transmit the data signal provided by the data transmission line to the sub-pixel through the data line based on the switch control signal provided by the switch control line so as to lighten the sub-pixel. In each switch circuit group, each switch circuit is coupled with the same color sub-pixels through each data line positioned on the same layer, and each switch circuit is coupled with different data transmission lines and/or different switch control lines. In this way, each switch circuit in each switch circuit group can transmit different data signals to each data line which is located in the same layer and is coupled to the same color sub-pixel. Furthermore, when the data lines are short-circuited, the coupled sub-pixels have different luminous brightness, so that the reliable detection of the luminous abnormality caused by the short circuit of the data lines is realized.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and other drawings may be obtained according to these drawings without inventive effort for a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure;
FIG. 2 is a schematic view of another display substrate according to an embodiment of the disclosure;
FIG. 3 is a schematic diagram of a circuit structure in a display substrate, illustrating the structure shown in FIG. 1;
FIG. 4 is a schematic diagram of a circuit structure in a display substrate, illustrating the structure shown in FIG. 2;
FIG. 5 is an equivalent circuit diagram of the structure shown in FIG. 2;
FIG. 6 is an equivalent circuit diagram of the structure shown in FIG. 4;
FIG. 7 is a schematic view of a structure of a display substrate according to another embodiment of the disclosure;
FIG. 8 is a schematic diagram of a circuit structure in a display substrate, illustrating the structure shown in FIG. 7;
FIG. 9 is an equivalent circuit diagram of the structure shown in FIG. 7;
FIG. 10 is a schematic view of a structure of a display substrate according to another embodiment of the disclosure;
FIG. 11 is a schematic diagram of a circuit structure in a display substrate, which is exemplified by the structure shown in FIG. 9;
fig. 12 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure.
Detailed Description
In order to make the objects, technical solutions and advantages of the present disclosure more apparent, embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings.
The terminology used in the description of the embodiments of the disclosure is for the purpose of describing the embodiments of the disclosure only and is not intended to be limiting of the disclosure. Unless defined otherwise, technical or scientific terms used in the embodiments of the present disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present disclosure belongs. For example, the use of "first," "second," or "third," and the like, in embodiments of the present disclosure, does not denote any order, quantity, or importance, but rather is used to distinguish one element from another. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, is intended to mean that elements or items that are present in front of "comprising" or "comprising" are included in the word "comprising" or "comprising", and equivalents thereof, without excluding other elements or items. "upper", "lower", "left" or "right" etc. are only used to indicate relative positional relationships, which may also be changed accordingly when the absolute position of the object to be described is changed. "coupled" or "connected" refers to electrical connection. "and/or" means that there may be three relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist together, and B exists alone. The character "/" generally indicates that the context-dependent object is an "or" relationship.
Display devices employing an OLED display substrate have become a mainstream trend, and the OLED display substrate generally includes a plurality of pixels arranged in an array, and each pixel includes a plurality of sub-pixels of different colors. That is, the OLED display substrate generally includes a plurality of sub-pixels of different colors. The subpixels of the same column may be connected to one data line to receive a data signal provided by the data line. The subpixels of different columns may be coupled to different data lines.
The data lines are often wired using metal (e.g., molybdenum Mo), i.e., the material of the data lines is a metal material. In addition, in order to meet the higher requirements of the resolution improvement of the display substrate on the process error (Margin) on the premise of ensuring that the display substrate reliably displays the monochromatic images, a plurality of data lines in the display substrate are often arranged in double-layer metal wiring at different layers. That is, one layer of metal wiring is used for one part of the data lines, and another layer of metal wiring is used for the other part of the data lines. And, can be provided with the insulating layer between this bilayer metal to keep apart different layer metals, avoid signal crosstalk.
However, metal residues (Remain) occur more or less during the metal wiring, and the metal residues easily cause Short circuits (Short) between adjacent data lines using the same-layer metal wiring, so that abnormal data signals transmitted to the sub-pixels are easily caused, and abnormal light-emitting brightness of the sub-pixels affects normal display of the display substrate.
At present, before the OLED display substrate leaves the factory, a lighting test is performed on a plurality of sub-pixels with different colors, so as to verify whether the sub-pixels can emit light normally. In the related art, in order to perform a lighting test on a plurality of sub-pixels, a plurality of switch circuits are generally disposed in the OLED display substrate, and each switch circuit is respectively coupled to a switch control line and a data transmission line, and is further coupled to the sub-pixels through a data line. Each of the switching circuits is configured to transmit a data signal supplied from the data transmission line to the sub-pixel via the data line in response to a switching control signal supplied from the switching control line to light the sub-pixel. And, each switch circuit coupled to the same color sub-pixel shares the same data transmission line and the same switch control line, i.e., each switch circuit simultaneously transmits the same data signal to the coupled sub-pixel.
However, through testing, the same data signal is transmitted to the same color sub-pixels at the same time, so that the problem of abnormal light emission caused by short circuit of the data lines coupled to the same color sub-pixels cannot be reliably and timely detected. If the short circuit problem cannot be detected in time during the lighting test, the display substrate enters a Module (MDL) factory for further processing, which causes loss of MDL materials and increases production cost.
The embodiment of the disclosure provides a display substrate, in which different switch circuits can write different data signals into each data line which is positioned on the same layer and is coupled with the same color sub-pixel in a lighting test stage, and the different data signals can be data signals with different potentials and/or data signals which are not written at the same time. In this way, when the data line is shorted, the load (Loading) on the data line where the short occurs can be changed with respect to the load on the data line where the short does not occur. The sub-pixels have different light emission luminance based on the load change. Furthermore, the abnormal problem of the lighting picture caused by short circuit can be timely detected, and the display substrate with the poor problem of the signal line can be timely intercepted during lighting test, so that MDL materials are prevented from being wasted.
Wherein, the same layer may refer to: and forming a film layer for forming a specific pattern by adopting the same film forming process, and then patterning the film layer by using the same mask plate through a one-time patterning process to form a layer structure. Depending on the particular pattern, a patterning process may include multiple exposure, development, or etching processes, and the particular pattern in the formed layer structure may be continuous or discontinuous. That is, multiple elements, components, structures, and/or portions located in a "same layer" are composed of the same material and formed by the same patterning process. In this way, the manufacturing process and manufacturing cost can be saved, and the manufacturing efficiency can be increased. In the embodiment of the disclosure, the data lines located in the same layer refer to data lines formed in the same layer at one time by using the same material.
Fig. 1 is a schematic structural diagram of a display substrate according to an embodiment of the disclosure. As shown in fig. 1, the display substrate includes: a substrate 01, the substrate 01 having a display area A1 and a non-display area B1 at least partially surrounding the display area A1. For example, the non-display area B1 shown in fig. 1 is located at the lower side of the display area A1, and is adjacent to the display area A1, i.e., partially surrounds the display area A1. Of course, the non-display area B1 is not limited to being located at the lower side of the display area A1, and for example, the non-display area B1 may be located at the upper side of the display area A1. In the embodiment of the present disclosure, the non-display region B1 may also be referred to as a Pad region (Pad Area).
With continued reference to fig. 1, the display substrate further includes: a plurality of sub-pixels of different colors located in the display area A1. For example, fig. 1 shows that in the display substrate, the plurality of subpixels of different colors include a plurality of Red (Red) subpixels R, a plurality of Green (Green) subpixels G, and a plurality of Blue (Blue) subpixels B. One red sub-pixel R, one green sub-pixel G, and one blue sub-pixel B may belong to one pixel.
With continued reference to fig. 1, the display substrate further includes: a plurality of data lines D0 located in the display area A1 and the non-display area B1, and a plurality of first switch control lines SW1, a plurality of data transmission lines D1 and a plurality of switch circuit groups 02 each including a plurality of switch circuits 021, both located in the non-display area B1.
The plurality of data lines D0 are coupled to the plurality of sub-pixels, and the plurality of data lines D0 are used for providing data signals to the plurality of sub-pixels. For example, referring to fig. 1, a plurality of data lines D0 may be coupled to a plurality of columns of subpixels in a one-to-one correspondence. That is, the subpixels in the same column are coupled to the same data line D0, and the subpixels in different columns are coupled to different data lines D0. The plurality of green sub-pixels G may be located in the same column and coupled to one data line D0. The red sub-pixels R and the blue sub-pixels B may be located in the same column and coupled to a data line D0. That is, the red and blue subpixels R and B may share one data line D0.
Of course, in some other embodiments, the red subpixel R and the blue subpixel B may be coupled with different data lines D0. For example, a plurality of red subpixels R may be located in the same column and coupled to one data line D0. And, a plurality of blue sub-pixels B may be located in the same column and coupled to one data line D0.
Each switch circuit 021 is coupled to one first switch control line SW1, one data transmission line D1 and one data line D0, respectively, and each switch circuit 021 is coupled to a different data line D0. Each of the switching circuits 021 is for transmitting the data signal supplied from the data transmission line D1 to the data line D0 in response to the first switching control signal supplied from the first switching control line SW1.
For example, each of the switch circuits 021 may control the data transmission line D1 and the data line D0 to be turned on when the potential of the first switch control signal provided by the first switch control line SW1 is an active potential, and then the data signal provided by the data transmission line D1 may be transmitted to the sub-pixel via the data line D0. And, each of the switching circuits 021 may control the data transmission line D1 and the data line D0 to be decoupled when the potential of the first switching control signal supplied from the first switching control line SW1 is an inactive potential. Wherein the effective potential may be a low potential relative to the ineffective potential.
In the embodiment of the disclosure, at least two data lines D0 of the plurality of data lines D0 are located at different layers, and at least two data lines D0 coupled to the same color sub-pixel are located at the same layer. As described in the above embodiments, the different layers herein refer to: wiring is made of different layers of metals. Located at the same layer means: is wired by the same layer metal.
For example, referring to fig. 1, a display substrate is shown in which a plurality of data lines D0 are wired using a double-layered metal. That is, a part of the data line D0 is wired by a first layer metal close to the substrate 01, and another part of the data line D0 is wired by a second layer metal far from the substrate 01. In the figure, the line thickness is used for distinguishing, a relatively thick data line D0 adopts a first layer of metal wiring, and a relatively thin data line D0 adopts a second layer of metal wiring.
On the basis, in each switch circuit group 02 described in the embodiments of the present disclosure, each switch circuit 021 is coupled to the same color sub-pixel through the data line D0, the data lines to which each switch circuit 021 is coupled are located at the same layer, and each switch circuit 021 is coupled to a different target signal line. Wherein the target signal line may include at least one of a data transmission line D1 and a first switch control line SW1.
For example, referring to fig. 1, each of the switching circuit groups 02 shown includes two switching circuits 021, and the target signal line is a data transmission line D1. That is, two switching circuits 021 in each switching circuit group 02 are respectively coupled to different two data transmission lines D1. On this basis, the two switch circuits 021 can transmit different data signals to the same color sub-pixels via the respective data lines D0 by flexibly controlling the data signals supplied from the respective data transmission lines D1, which may be referred to herein as different potentials. Thus, when the two data lines D0 coupled to the two switch circuits 021 are shorted, the sub-pixels coupled to the two data lines D0 have abnormal light-emitting brightness due to different written data signals. Further, the problem of abnormal display due to the short circuit can be detected, that is, the detection of the short circuit due to the metal residue of the data line D0 positioned at the same layer can be realized.
Referring to fig. 1, if the target signal line is the first switch control line SW1, the first switch control signals provided by the first switch control lines SW1 may be flexibly controlled, so that each switch circuit 021 in one switch circuit group 02 transmits different data signals to the same color sub-pixels via each data line D0, where the time period of writing the data signals may be different. Thus, the detection of the short circuit of the data line D0 located at the same layer due to the metal residue can be also realized.
In summary, the embodiments of the present disclosure provide a display substrate. The display substrate includes a plurality of switch circuit groups, each switch circuit group including a plurality of switch circuits. Each switch circuit is used for transmitting the data signal provided by the coupled data transmission line to the sub-pixel through the coupled data line based on the signal provided by the coupled switch control line so as to light the sub-pixel. In each switch circuit group, each switch circuit is coupled with the same color sub-pixels through each data line positioned on the same layer, and each switch circuit is coupled with different data transmission lines and/or switch control lines. In this way, each switch circuit in each switch circuit group can transmit different data signals to each data line which is located in the same layer and is coupled to the same color sub-pixel. Furthermore, when the data lines are short-circuited, the coupled sub-pixels have different luminous brightness, so that the reliable detection of the luminous abnormality caused by the short circuit of the data lines is realized.
Alternatively, in the embodiment of the disclosure, the data lines D0 coupled to the same color sub-pixel may be located at the same layer, and the data lines D0 coupled to different color sub-pixels may be located at different layers. Thus, referring to fig. 1, it can be seen that for the arrangement of the sub-pixels shown in fig. 1, the data lines D0 coupled to the sub-pixels in the odd columns are located in the same layer, and the data lines coupled to the sub-pixels in the even columns are located in different layers.
For example, in a direction away from the substrate 01, the data line D0 formed by the first layer metal wiring may be coupled to the green sub-pixel G located in the even numbered columns, and the data line D0 formed by the second layer metal wiring may be coupled to the red sub-pixel R and the blue sub-pixel B located in the odd numbered columns.
Optionally, as can be further seen with continued reference to fig. 1, in each switch circuit group 02, a respective switch circuit 021 may be coupled to a respective adjacent data line D0. Here adjacent means: the data lines D0 are located at the same layer and adjacent to each other. In this way, wiring can be simplified.
Optionally, as can be further seen with continued reference to fig. 1, each switch circuit group 02 may include: two switching circuits 021. In conjunction with the above embodiment, the two switch circuits 021 may be coupled to two data lines (e.g., two data lines D1 shown in fig. 1) and may be coupled to two data lines D0 located on the same layer and adjacent to each other. In this way, reliable detection of a short circuit of every two data lines D0 located on the same layer and adjacent to each other can be achieved.
Alternatively, as can also be seen with continued reference to fig. 1, the respective switch circuit groups 02 coupled to the same color subpixels via data lines D0 may share the first switch control line SW1 and the data transmission line D1. That is, referring to fig. 1, the respective switching circuit groups 02 coupled to the same color sub-pixels may be coupled to the same two data transmission lines D1 and may be coupled to the same one first switching control line SW1. Thus, wiring can be further simplified, and cost can be saved.
Alternatively, as an alternative implementation, referring to fig. 1, the target signal line described in the embodiment of the present disclosure may be a data transmission line D1. On the basis of this, in each switch circuit group 02, the respective switch circuits 021 may be coupled to the same first switch control line SW1. That is, each switch circuit 021 can simultaneously transmit data signals from different data transmission lines D1 to each data line D0 to which it is coupled.
As another alternative implementation, referring to fig. 2, the target signal line may be the first switch control line SW1. On the basis of this, in each switch circuit group 02, the respective switch circuits 021 may be coupled to the same data transmission line D1. That is, the respective switching circuits 021 may not simultaneously transmit the data signals from the same data transmission line D1 to the respective data lines D0 to which they are coupled.
It should be noted that, referring to fig. 1 and 2, in order to distinguish between different data transmission lines D1, the data transmission line D1 coupled to the switch circuit 021 coupled to the green sub-pixel G is denoted as d1_g, and the data transmission line D1 coupled to the switch circuit 021 coupled to the red sub-pixel R and the blue sub-pixel B is denoted as d1_rb. To distinguish between the different first switch control lines SW1, the first switch control line SW1 coupled to the switch circuit 021 coupled to the green sub-pixel G is denoted as sw1_g, and the first switch control line SW1 coupled to the switch circuit 021 coupled to the red sub-pixel R and the blue sub-pixel B is denoted as sw1_rb.
And, for the structure shown in fig. 1, the display substrate may include: four data transmission lines d1_g1, d1_g2, d1_rb1, and d1_rb2, and two first switch control lines sw1_g and sw1_rb. For the structure shown in fig. 2, the display substrate may include: four first switch control lines sw1_g1, sw1_g2, sw1_rb1, and sw1_rb2, and two data transmission lines d1_g and d1_rb. The following drawings are identified in the same manner and will not be repeated.
In the implementation manner shown in fig. 1 and fig. 2, the purpose of writing the differential data signal into the data line D0 positioned at the same layer can be achieved, and further, the abnormal display problem caused by the poor (e.g. short circuit) signal line can be reliably detected during the lighting test.
As can be seen from fig. 2, on the basis that each switch circuit 021 in each switch circuit group 02 is coupled to each adjacent data line D0, each switch circuit group 02 is coupled to the same two data lines D1, and is coupled to the same first switch control line SW1, the first switch control signal provided by the first switch control line sw1_g1 and the first switch control signal provided by the first switch control line sw1_g2 can be controlled for the green sub-pixel G, so that when each switch circuit 021 coupled to an odd-numbered row of green sub-pixels G transmits data signals to each data line D0 at the same time, each switch circuit 021 coupled to an even-numbered row of green sub-pixels G stops transmitting data signals to each data line D0 coupled. And, when each switch circuit 021 coupled to the even-numbered row green sub-pixel G transmits the data signal to each data line D0 coupled at the same time, each switch circuit 021 coupled to the odd-numbered row green sub-pixel G stops transmitting the data signal to each data line D0 coupled.
Of course, in some other embodiments, the target signal line may be the data transmission line D1 and the first switch control line SW1. That is, the respective switching circuits 021 in each switching circuit group 02 can transmit data signals from different data transmission lines D1 to the respective coupled data lines D0 at different times.
As for the structures shown in fig. 1 and 2, referring to the schematic structural diagrams of the display substrate shown in fig. 3 and 4, respectively, each of the switching circuits 021 may include: a first switching transistor K1.
The gate of the first switching transistor K1 may be coupled to the first switching control line SW1, the first pole of the first switching transistor K1 may be coupled to the data transmission line D1, and the second pole of the first switching transistor K1 may be coupled to the data line D0.
By way of example, fig. 5 shows a circuit equivalent diagram of the structure shown in fig. 1 and 3, taking green subpixel G as an example. Referring to fig. 3 and 5, in each switch circuit group 02 coupled to the green sub-pixel G, the gates of the two first switch transistors K1 included in the two switch circuits 021 may be both coupled to the same first switch control line sw1_g. And the first pole of one first switching transistor K1 may be coupled with one data transmission line d1_g1, and the first pole of the other first switching transistor K1 may be coupled with the other data transmission line d1_g2. And, the second poles of the two first switch transistors K1 may be respectively coupled to two data lines D0 located at the same layer and adjacent to each other.
That is, as shown in fig. 5, for the green sub-pixel G, the first switching transistors K1 coupled to the odd-numbered rows of green sub-pixels G are coupled to the same data transmission line d1_g1, and the first switching transistors K1 coupled to the even-numbered rows of green sub-pixels G are coupled to the same data transmission line d1_g2. And the first switch transistors K1 coupled to the green sub-pixels G of each row are all coupled to the same first switch control line sw1_g. The red sub-pixel R and the blue sub-pixel B are the same, and are not described in detail herein.
By way of example, fig. 6 shows an equivalent circuit diagram of the structure shown in fig. 2 and 4, taking green subpixel G as an example. Referring to fig. 4 and 6, in each switching circuit group 02 coupled to the green sub-pixel G, two switching circuits 021 include two first switching transistors K1, wherein a gate of one first switching transistor K1 may be coupled to one first switching control line sw1_g1, a gate of the other first switching transistor K1 may be coupled to the other first switching control line sw1_g2, and first poles of the two first switching transistors K1 may be coupled to the same data transmission line d1_g. And, the second poles of the two first switch transistors K1 may be respectively coupled to two data lines D0 located at the same layer and adjacent to each other.
That is, as shown in fig. 6, for the green sub-pixel G, the first switching transistors K1 coupled to the odd-numbered rows of green sub-pixels G are coupled to the same first switching control line sw1_g1, and the first switching transistors K1 coupled to the even-numbered rows of green sub-pixels G are coupled to the same first switching control line sw1_g2. And the first switch transistors K1 coupled to the green sub-pixels G of each row are all coupled to the same data transmission line d1_g. Furthermore, as described in the above embodiment, the first switch control signal provided by the first switch control line sw1_g1 and the first switch control signal provided by the first switch control line sw1_g2 are strictly mutually exclusive, so that when the first switch transistor K1 coupled to the odd-numbered row of green sub-pixels G is turned on, the first switch transistor K1 coupled to the even-numbered row of green sub-pixels G is turned off. And when the first switch transistor K1 coupled to the even-numbered row green sub-pixels G is turned on, the first switch transistor K1 coupled to the odd-numbered row green sub-pixels G is turned off. The red sub-pixel R and the blue sub-pixel B are the same, and are not described in detail herein.
Alternatively, based on the structure shown in fig. 2, as a further alternative implementation manner: referring to fig. 7, it can be seen that the display substrate according to the embodiment of the disclosure may further include: a plurality of second switch control lines SW2 located in the non-display area B1.
Each of the switch circuits 021 may be further coupled to a second switch control line SW2. Accordingly, each of the switching circuits 021 may be used to transmit the data signal supplied from the data transmission line D1 to the data line D0 in response to the first switching control signal supplied from the first switching control line SW1 and the second switching control signal supplied from the second switching control line SW2.
For example, each of the switching circuits 021 may control the coupled data transmission line D1 and the data line D0 to be turned on when the potential of the first switching control signal and the potential of the second switching control signal are both active potentials, and may control the coupled data transmission line D1 and the data line D0 to be decoupled when the potential of the first switching control signal and/or the potential of the second switching control signal are inactive potentials. By further providing the second switch control line SW2, control reliability can be improved.
In order to distinguish between the different second switch control lines SW2, the second switch control line SW2 coupled to the switch circuit 021 coupled to the green sub-pixel G is denoted as sw2_g in fig. 7, and the second switch control line SW2 coupled to the switch circuit 021 coupled to the red sub-pixel R and the blue sub-pixel B is denoted as sw2_rb.
Alternatively, in the embodiment of the present disclosure, the second switch control line SW2 may be shared by the respective switch circuit groups 02 coupled to the same color subpixels through the data line D0. That is, referring to fig. 7, each of the switching circuit groups 02 coupled to the same color sub-pixel may be coupled to the same one of the second switching control lines SW2. Thus, wiring can be further simplified, and cost can be saved. That is, for the structure shown in fig. 7, the display substrate includes two second switch control lines sw2_g and sw2_rb in total.
With respect to the structure shown in fig. 7, fig. 8 shows a schematic structural view of still another display substrate. As can be seen with reference to fig. 8, each of the switching circuits 021 may include, on the basis of including the second switch control line SW 2: a first switching transistor K1 and a second switching transistor K2. The switching circuit 021 including the first switching transistor K1 and the second switching transistor K2 may be referred to as a selection (MUX) circuit.
The gate of the first switching transistor K1 may be coupled to the first switching control line SW1, the first pole of the first switching transistor K1 may be coupled to the data transmission line D1, and the second pole of the first switching transistor K1 may be coupled to the first pole of the second switching transistor K2.
The gate of the second switching transistor K2 may be coupled to the second switching control line SW2, and the second poles of the second switching transistor K2 may be coupled to the data line D0.
By way of example, fig. 9 shows an equivalent circuit diagram of the structure shown in fig. 7 and 8, taking green subpixel G as an example. Referring to fig. 7 and 9, it can be seen that each switching circuit 021 includes a first switching transistor K1 and a second switching transistor K2 in each switching circuit group 02 coupled to the green subpixel G. In each of the switch circuit groups 02, the two switch circuits 021 include two first switch transistors K1, wherein a gate of one first switch transistor K1 may be coupled to one first switch control line sw1_g1, a gate of the other first switch transistor K1 may be coupled to the other first switch control line sw1_g2, and first poles of the two first switch transistors K1 may be coupled to the same data transmission line d1_g. And, the second poles of the two first switching transistors K1 may be coupled with the first poles of the two second switching transistors K2 included in the two switching circuits 021, respectively. The gates of the two second switching transistors K2 may be coupled to the same second switching control line sw2_g, and the second poles of the two second switching transistors K2 may be coupled to two data lines D0 located at the same layer and adjacent to each other, respectively.
That is, as shown in fig. 9, for the green sub-pixels G, the first switching transistors K1 coupled to the odd-numbered rows of green sub-pixels G are coupled to the same first switching control line sw1_g1, the first switching transistors K1 coupled to the even-numbered rows of green sub-pixels G are coupled to the same first switching control line sw1_g2, and the first switching transistors K1 coupled to the respective rows of green sub-pixels G are coupled to the same data transmission line d1_g. The second switch transistors K2 coupled to the green sub-pixels G of each row are coupled to the same second switch control line sw2_g. The red sub-pixel R and the blue sub-pixel B are the same, and are not described in detail herein.
Optionally, the first switching transistor K1 and the second switching transistor K2 described in the embodiments of the present disclosure may be P-type transistors. Accordingly, as described in the above embodiments, the effective potential may be a low potential with respect to the ineffective potential. Of course, in some other embodiments, the first switching transistor K1 and the second switching transistor K2 may be N-type transistors, where the effective potential may be high with respect to the ineffective potential.
Alternatively, fig. 10 shows a schematic structural diagram of still another display substrate based on fig. 8. Referring to fig. 10, in some embodiments, each switch circuit group coupled to only the green sub-pixel G may be coupled to a different target signal line, i.e., only the differential data signal is written to the data line D0 coupled to the green sub-pixel G and located at the same layer. On this basis, referring to fig. 10, each of the switching circuits 021 coupling the red subpixel R and the blue subpixel B may be coupled with the same first switching control line sw1_rb and the same data transmission line d1_rb. On the basis of this, each switching circuit 021 is used to transmit the same data signal to the coupled red subpixel R and blue subpixel B at the same time.
Of course, in some embodiments, it is also possible to couple only each switch circuit group of the red subpixel R and the blue subpixel B, where each switch circuit is coupled to a different target signal line. On the basis, referring to fig. 10, each of the switch circuits 021 coupled to the green sub-pixel G may be coupled to the same first switch control line sw1_g and the same data transmission line d1_g, and each of the switch circuits 021 is used to simultaneously transmit the same data signal to the coupled green sub-pixel G.
Alternatively, referring to fig. 3, 4, 8 and 11, it can be seen that the first switch control line SW1, the second switch control line SW2 and the data transmission line D1 may be coupled with an Equipment Test (ET) circuit for receiving the first switch control signal, the second switch control signal and the data signal provided by the ET circuit, respectively. And, each data line D0 may be further coupled to a source driving integrated circuit (integrated circuit, IC) and used for receiving a data signal provided by the IC. In the lighting test according to the embodiment of the present disclosure, the ET circuit supplies the data signal, that is, the IC does not supply the data signal. During normal lighting, the data signal is provided by the IC, i.e. the ET circuit does not provide a data signal. It will be appreciated that the IC may be coupled to the data line D0 at the MDL factory and the ET circuit may be removed at the MDL factory. That is, the final shipped display device may not include the ET circuit.
Alternatively, referring to fig. 3, 4, 8 and 11, it can be further seen that the green sub-pixel G is generally pentagonal in shape. The blue subpixel B and the red subpixel R are generally hexagonal in shape.
Optionally, referring to fig. 10, it may also be seen that in an embodiment of the present disclosure, each data line D0 may include: a data line lead D01 located in the non-display area B1, and a data signal line D02 located in the display area A1. Each of the switching circuits 021 and IC may be coupled to a data line lead D01 included in each of the data lines D0, the data line lead D01 is coupled to a data signal line D02, and the data signal line D02 is coupled to the sub-pixel.
Alternatively, as can be seen with reference to fig. 1 to 10, in the embodiment of the present disclosure, the display area A1 and the non-display area B1 may be arranged along the pixel row direction Y1, and the first switch control line SW1, the second switch control line SW2, and the data transmission line D1 in the display substrate may each extend along the pixel column direction X1, and the data line D0 may extend along the pixel row direction Y1. Wherein the pixel column direction X1 and the pixel row direction Y1 may intersect. As shown in fig. 1, the pixel column direction X1 and the pixel row direction Y1 are perpendicular to each other.
In summary, the embodiments of the present disclosure provide a display substrate. The display substrate includes a plurality of switch circuit groups, each switch circuit group including a plurality of switch circuits. Each switch circuit is used for transmitting the data signal provided by the coupled data transmission line to the sub-pixel through the coupled data line based on the signal provided by the coupled switch control line so as to light the sub-pixel. In each switch circuit group, each switch circuit is coupled with the same color sub-pixels through each data line positioned on the same layer, and each switch circuit is coupled with different data transmission lines and/or switch control lines. In this way, each switch circuit in each switch circuit group can transmit different data signals to each data line which is located in the same layer and is coupled to the same color sub-pixel. Furthermore, when the data lines are short-circuited, the coupled sub-pixels have different luminous brightness, so that the reliable detection of the luminous abnormality caused by the short circuit of the data lines is realized.
Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present disclosure. As shown in fig. 12, the display device includes: a power supply assembly J1, and a display substrate 00 as shown in the above-described drawings.
The power supply assembly J1 is coupled with the display substrate 00 and is used for supplying power to the display substrate 00.
Alternatively, the display device may be: OLED display devices, active-matrix organic light-emitting diode (AMOLED) display devices, cell phones, tablet computers, televisions, and displays, and the like.
The foregoing description of the preferred embodiments of the present disclosure is provided for the purpose of illustration only and is not intended to limit the disclosure to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, alternatives, and alternatives falling within the spirit and principles of the disclosure.
Claims (10)
1. A display substrate, the display substrate comprising:
a substrate having a display region and a non-display region at least partially surrounding the display region;
a plurality of subpixels of different colors located in the display area;
a plurality of data lines in the display region and the non-display region, the plurality of data lines coupled to the plurality of sub-pixels and configured to provide data signals to the plurality of sub-pixels;
and a plurality of first switch control lines, a plurality of data transmission lines and a plurality of switch circuit groups, each of the switch circuit groups including a plurality of switch circuits, each of the switch circuits being coupled to one of the first switch control lines, one of the data transmission lines and one of the data lines, respectively, and being configured to transmit data signals provided by the data transmission lines to the data lines in response to first switch control signals provided by the first switch control lines, each of the switch circuits being coupled to a different one of the data lines;
at least two data lines in the plurality of data lines are positioned on different layers, and at least two data lines coupled with sub-pixels with the same color are positioned on the same layer; in each switch circuit group, each switch circuit is coupled with the sub-pixels with the same color through a data line, the data lines coupled with each switch circuit are positioned on the same layer, each switch circuit is coupled with different target signal lines, and each target signal line comprises at least one of the data transmission line and the first switch control line; the different switching circuits are used for writing different data signals into the data lines which are positioned on the same layer and are coupled with the same color sub-pixels in the lighting test stage, wherein the different data signals refer to data signals with different potentials and/or data signals which are not written at the same time.
2. The display substrate of claim 1, wherein each data line coupled to a same color sub-pixel is located at a same layer, and each data line coupled to a different color sub-pixel is located at a different layer;
in each switch circuit group, each switch circuit is coupled with each adjacent data line.
3. The display substrate according to claim 1, wherein the target signal line is the data transmission line;
in each switch circuit group, each switch circuit is coupled with the same first switch control line.
4. The display substrate according to claim 1, wherein the target signal line is the first switch control line;
in each switch circuit group, each switch circuit is coupled with the same data transmission line.
5. A display substrate according to claim 3 or 4, wherein each of the switching circuits comprises: a first switching transistor;
the grid electrode of the first switch transistor is coupled with the first switch control line, the first pole of the first switch transistor is coupled with the data transmission line, and the second pole of the first switch transistor is coupled with the data line.
6. The display substrate of claim 4, further comprising:
and a plurality of second switch control lines located in the non-display area, each switch circuit is further coupled to one second switch control line, and each switch circuit is used for responding to the first switch control signal provided by the first switch control line and the second switch control signal provided by the second switch control line and transmitting the data signal provided by the data transmission line to the data line.
7. The display substrate of claim 6, wherein each of the switching circuits comprises: a first switching transistor and a second switching transistor;
a gate of the first switching transistor is coupled to the first switching control line, a first pole of the first switching transistor is coupled to the data transmission line, and a second pole of the first switching transistor is coupled to a first pole of the second switching transistor;
the gate of the second switching transistor is coupled to the second switching control line, and the second pole of the second switching transistor is coupled to the data line.
8. The display substrate of claim 6, wherein the first switch control line, the second switch control line, and the data transmission line are shared among respective switch circuit groups coupled to the same color subpixels through data lines.
9. The display substrate according to any one of claims 1 to 4, wherein each of the switch circuit groups comprises: two of the switching circuits.
10. A display device, characterized in that the display device comprises: a power supply assembly as claimed in any one of claims 1 to 9;
the power supply assembly is coupled with the display substrate and is used for supplying power to the display substrate.
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| CN1670800A (en) * | 2004-03-15 | 2005-09-21 | 三星Sdi株式会社 | Display device and driving method thereof |
| CN110264966A (en) * | 2019-05-09 | 2019-09-20 | 京东方科技集团股份有限公司 | Display base plate and its driving method, display device |
| CN113296324A (en) * | 2021-05-20 | 2021-08-24 | 福州京东方光电科技有限公司 | Display substrate, driving method thereof, display panel and display device |
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| KR101015312B1 (en) * | 2009-08-20 | 2011-02-15 | 삼성모바일디스플레이주식회사 | Organic light emitting display device and mother substrate thereof |
| CN109817134B (en) * | 2019-03-19 | 2022-03-18 | 京东方科技集团股份有限公司 | Organic light emitting diode display substrate and driving method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1670800A (en) * | 2004-03-15 | 2005-09-21 | 三星Sdi株式会社 | Display device and driving method thereof |
| CN110264966A (en) * | 2019-05-09 | 2019-09-20 | 京东方科技集团股份有限公司 | Display base plate and its driving method, display device |
| CN113296324A (en) * | 2021-05-20 | 2021-08-24 | 福州京东方光电科技有限公司 | Display substrate, driving method thereof, display panel and display device |
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