CN109755279B - OLED display panel and OLED display device - Google Patents
OLED display panel and OLED display device Download PDFInfo
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- CN109755279B CN109755279B CN201910019887.1A CN201910019887A CN109755279B CN 109755279 B CN109755279 B CN 109755279B CN 201910019887 A CN201910019887 A CN 201910019887A CN 109755279 B CN109755279 B CN 109755279B
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Abstract
The invention provides an OLED display panel and an OLED display device, relates to the technical field of display and is used for solving the technical problem that the light-transmitting area of the existing OLED display panel is low in occupied ratio. The power supply line can transmit power supply potential to at least two rows of storage capacitors, the number of the power supply lines is reduced, more metal film layers are prevented from being staggered in the OLED display panel, and therefore the light-transmitting area occupation ratio of the OLED display panel can be improved.
Description
Technical Field
The invention relates to the technical field of display, in particular to an OLED display panel and an OLED display device.
Background
Organic Light Emitting Diode (OLED) devices, also called Organic electroluminescent Diode devices, have attracted attention because of their advantages of self-luminescence, rich colors, fast response, wide viewing angle, Light weight, thin thickness, low power consumption, and flexible display, and OLED display devices made of OLED devices are regarded as display devices with great application prospects.
OLED display device includes OLED display panel usually, has more metal rete in the OLED display panel usually, and because the structural design restriction of metal rete, causes OLED display panel's light-transmitting area to account for than lower, sets up fingerprint identification device when the dorsal part at OLED display panel to when the function of fingerprint identification under the realization screen, can influence fingerprint identification device to the positive finger fingerprint identification precision of touch at OLED display panel.
Disclosure of Invention
In view of the foregoing problems, embodiments of the present invention provide an OLED display panel and an OLED display device, which are used to solve the technical problem that the light-transmitting area of the existing OLED display panel is low.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a first aspect of an embodiment of the present invention provides an OLED display panel, which includes a plurality of sub-pixels arranged in an array, each of the sub-pixels has a corresponding driving circuit, the driving circuit includes a storage capacitor, the OLED display panel further includes a plurality of power supply lines arranged along a column direction or a row direction, each of the power supply lines corresponds to one row of the storage capacitors parallel to the power supply line, and at least one of the power supply lines is connected to at least two rows of the storage capacitors parallel to the power supply line.
In the OLED display panel provided in the embodiments of the present invention, among the plurality of power supply lines arranged in the column direction or the row direction, at least one power supply line is connected to at least two rows of storage capacitors parallel to the power supply lines, and a power supply potential can be transmitted to the at least two rows of storage capacitors through the one power supply line, so that the number of the power supply lines can be reduced.
As an improvement of the OLED display panel according to the embodiment of the present invention, a plurality of the power supply lines are arranged in parallel, and any two adjacent power supply lines have the same number of rows of the storage capacitors. When the OLED display panel displays, the power supply line transmits power supply potential to the storage capacitor, so that the difference of the power supply potential received by the storage capacitor at each part in the OLED display panel is lower, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, the plurality of power supply lines are divided into a plurality of line groups, and the storage capacitors are arranged in the same number of rows between any two adjacent line groups. The power supply lines can be arranged according to the situation of each part in the OLED display panel, so that the stability of the power voltage transmitted to the storage capacitor through the power supply lines is improved, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, the number of the power supply lines in the line group is several, and two adjacent power supply lines in the line group respectively correspond to two adjacent rows of the storage capacitors. The power supply lines in the line groups are closely arranged, and the power supply lines among the line groups are loosely arranged, so that the power supply lines in the line groups are concentrated, the arrangement flexibility of the power supply lines in the OLED display panel is improved, the stability of the power supply voltage transmitted to the storage capacitor through the power supply lines is improved, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, in the line group, the number of the power supply lines is several, and at least one row of the storage capacitors is spaced between two adjacent power supply lines in the line group; the number of rows of the storage capacitors spaced between two adjacent power supply lines in the line group is smaller than the number of rows of the storage capacitors spaced between two adjacent line groups. The plurality of power supply lines are densely and sparsely distributed in the OLED display panel, so that the power supply potential difference received by the storage capacitors at all parts in the OLED display panel is further reduced, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the invention, at least a part of adjacent two of the storage capacitors is connected by a conductive line, and the conductive line or an extension line of the conductive line may intersect with the power supply line, and preferably, the conductive line is perpendicular to the power supply line. The transmission distance of the power supply potential transmitted to the storage capacitor is shortened, the difference of the power supply potentials received by the storage capacitors at all parts in the OLED display panel is reduced, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, the storage capacitors in the rows parallel to the power supply lines are divided into a plurality of storage capacitor groups, and each storage capacitor group is correspondingly connected to one power supply line; in the storage capacitor group including a plurality of rows of the storage capacitors, two adjacent storage capacitors are connected by a conductive line, and the conductive line or an extension line of the conductive line may intersect the power supply line, and preferably, the conductive line is perpendicular to the power supply line. When the storage capacitor groups comprise a plurality of rows of storage capacitors, two adjacent storage capacitors are connected through the conducting wire in the direction perpendicular to the power supply lines, and the adjacent storage capacitors are not connected with each other between the two adjacent storage capacitor groups, so that the number of column-direction power supply lines is reduced, the number of row-direction power supply lines is also reduced, and the light-transmitting area occupation ratio of the OLED display panel is further improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, a vertical distance between any one row of the storage capacitors and the power supply line connected to the row of the storage capacitors is the smallest. Therefore, the vertical distance between any storage capacitor and the power supply line connected with the storage capacitor is minimized, the transmission distance of power supply voltage is reduced, the difference of power supply potentials received by the storage capacitors at all parts in the OLED display panel is reduced, and the display effect of the OLED display panel is improved.
As a further improvement of the OLED display panel according to the embodiment of the present invention, the storage capacitor includes an electrode layer connected to the power supply line; the power supply line and the electrode layer are positioned on the same layer, so that the process steps of manufacturing the OLED display panel are reduced, the efficiency is improved, and the cost is reduced; or the power supply line and the electrode layer are positioned on different layers, an insulating layer is arranged between the power supply line and the electrode layer, and the power supply line and the corresponding electrode layer are connected through via holes formed in the insulating layer, so that the occurrence of short circuit in the OLED display panel can be reduced, and the yield of the OLED display panel is improved.
A second aspect of the embodiments of the present invention provides an OLED display device, where the OLED display device includes the OLED display panel according to the above technical solution, and a fingerprint identification device disposed on a back side of the OLED display panel.
Compared with the prior art, the OLED display device has the same advantages as the OLED display panel according to the above technical solution, and details are not repeated herein.
In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the advantages brought by the technical features of the technical solutions, other technical problems solved by the OLED display panel and the OLED display device provided by the embodiments of the present invention, other technical features included in the technical solutions, and advantages brought by the technical features will be further described in detail in the detailed description.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an OLED display panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another OLED display panel according to an embodiment of the present invention.
Description of reference numerals:
1-a storage capacitor, 2-a power supply line,
3-conductive lines, 4-storage capacitor banks,
5-line family.
Detailed Description
In order to make the aforementioned objects, features and advantages of the embodiments of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a few embodiments of the invention, and not all 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.
As described in the background art, the OLED display panel in the prior art has a problem of low light transmission area, and the inventor researches and discovers that a film structure forming a driving circuit mainly includes a plurality of metal films, for example, the driving circuit of a sub-pixel in the OLED display panel generally includes a switching thin film transistor, a driving thin film transistor and a storage capacitor. When the OLED display panel operates, a fixed potential, i.e., a power supply potential, needs to be applied to the storage capacitor to implement the function of the storage capacitor, and therefore, a power supply line for applying the power supply potential to the storage capacitor needs to be disposed in the OLED display panel. In the conventional OLED display panel, a plurality of power supply lines are generally disposed along a column direction and a row direction, respectively, and each column-direction power supply line corresponds to one column of storage capacitors in the OLED display panel, and connected to each of the storage capacitors in the column, each row-wise power supply line corresponding to a row of storage capacitors in the OLED display panel, and is connected with each storage capacitor in the row storage capacitor, and the column-direction power supply line and the row-direction power supply line are arranged in a crossed manner, so that more metal film layers are staggered in the OLED display panel, thereby causing the light transmission area of the OLED display panel to be low, when the fingerprint identification device is arranged at the back side of the OLED display panel, the quantity of light reflected from the finger received by the fingerprint identification device is influenced, and further influence the fingerprint identification device to the fingerprint identification precision of the finger touching at the front of the OLED display panel.
For the above reasons, please refer to fig. 1, fig. 3 or fig. 4, an embodiment of the invention provides an OLED display panel, where the OLED display panel includes a plurality of sub-pixels arranged in an array, each sub-pixel has a corresponding driving circuit, and the driving circuit includes a storage capacitor; the OLED display panel further includes a plurality of power supply lines 2 arranged in a column direction or a row direction, each power supply line 2 corresponds to one row of storage capacitors 1 parallel to the power supply line 2, and at least one power supply line 2 is connected to at least two rows of storage capacitors 1 parallel to the power supply line 2, where the row is referred to as a column or a row.
It should be noted that, in the embodiment of the present invention, a plurality of sub-pixels are arranged in an array, each sub-pixel has a corresponding driving circuit, and the driving circuit includes a plurality of storage capacitors 1, so that each storage capacitor 1 corresponds to one sub-pixel, and the plurality of storage capacitors 1 are also arranged in an array. The power supply lines 2 may be arranged along the column direction of the sub-pixel array or the storage capacitor array in the OLED display panel, and in this case, the "rows" in this document are denoted as columns; the power supply lines 2 may also be arranged along the rows of the sub-pixel array or the storage capacitor array in the OLED display panel, and in this case, the "rows" herein mean the rows. For convenience of description, the embodiment of the present invention is described in detail by taking an example that the power supply line 2 is arranged along the column direction of the sub-pixel array or the storage capacitor array in the OLED display panel, and the case that the power supply line 2 is arranged along the row direction of the sub-pixel array or the storage capacitor array in the OLED display panel is similar to the case of the embodiment of the present invention, and is not repeated.
Specifically, with reference to fig. 1, the OLED display panel includes a plurality of sub-pixels arranged in an array, where the array may be an n × m array, that is, an array including n rows and m columns, the plurality of sub-pixels are arranged in the OLED display panel in an array including n rows and m columns, each sub-pixel has a corresponding driving circuit, the driving circuit may include a switching thin film transistor, a driving thin film transistor, and a storage capacitor 1, the number of the storage capacitors 1 is multiple, each storage capacitor 1 corresponds to one sub-pixel, and the plurality of storage capacitors 1 are also arranged in an array; a plurality of power supply lines 2 are arranged along the column direction of a storage capacitor array in the OLED display panel, the plurality of power supply lines 2 are sequentially arranged in parallel along the row direction of the storage capacitor array, and each power supply line 2 corresponds to one column of storage capacitors 1; in the plurality of power supply lines 2, at least one power supply line 2 is connected to at least two columns of storage capacitors 1, for example, in the plurality of power supply lines 2, one power supply line 2 may be connected to two, three or more columns of storage capacitors 1, or in the plurality of power supply lines 2, a part of the power supply line 2 may be connected to two, three or more columns of storage capacitors 1, or in the plurality of power supply lines 2, each power supply line 2 may be connected to two, three or more columns of storage capacitors 1, so as to transmit a power supply voltage to at least two columns of storage capacitors 1 through one power supply line 2.
As can be seen from the above description, in the OLED display panel according to the embodiment of the present invention, at least one power supply line 2 among the plurality of power supply lines 2 arranged in the column direction or the row direction is connected to at least two rows of storage capacitors 1 parallel to the power supply line 2, and the power supply potential can be transmitted to the at least two rows of storage capacitors 1 through the one power supply line 2, so that the number of the power supply lines 2 can be reduced, and compared with the prior art in which one column-direction power supply line 2 is arranged in the column direction corresponding to each column of storage capacitors 1 and one row-direction power supply line 2 is arranged in the row direction corresponding to each row of storage capacitors 1, it is possible to prevent a large number of metal film layers from being staggered in the OLED display panel, and thus it is possible to increase the light transmission area ratio.
When a device needing light detection is arranged on the back side of the OLED display panel to realize the function of under-screen identification, the light transmission area ratio of the OLED display panel provided by the embodiment of the invention is improved, so that the influence on the device needing light detection for identification can be reduced, the effect of the under-screen identification function can be improved, and the use experience of a user can be improved.
The OLED display device provided with the OLED display panel according to the embodiment of the present invention may be applied to different products, for example, mobile terminal products such as a mobile phone, a tablet computer, an electronic book, and a vehicle, and also products such as medical treatment, anti-theft, and door control, which are not limited herein.
It should be noted that, in the above embodiment, at least one power supply line 2 of the plurality of power supply lines 2 is connected to at least two rows of storage capacitors 1 parallel to the power supply line 2, for example, referring to fig. 1, the power supply lines 2 are arranged in a column direction, and at least one power supply line 2 is connected to at least two rows of storage capacitors 1, so that the number of column-direction power supply lines 2 is reduced compared with the prior art. In practical application, please refer to fig. 2, the number of the column-wise power supply lines 2 may be set to be the same as the number of columns of the storage capacitors 1, that is, each column-wise power supply line 2 corresponds to one column of the storage capacitors 1 and is connected to each storage capacitor 1 in the column of the storage capacitors 1, and in the row direction, the storage capacitors 1 may be independent from each other, that is, the storage capacitors 1 in the same row are not connected to each other, that is, the arrangement of the row-wise power supply lines is omitted, so that more metal films may be prevented from being interlaced in the OLED display panel, and the light transmission area ratio of the OLED display panel may be increased; accordingly, in practical applications, the column-oriented power supply lines may be omitted instead of the row-oriented power supply lines.
In the above embodiment, at least one power supply line 2 of the plurality of power supply lines 2 is connected to at least two rows of storage capacitors 1 parallel to the power supply lines 2, and in practical applications, the arrangement of the plurality of power supply lines 2 may be varied, which will be described below by way of example, but the arrangement of the plurality of power supply lines 2 includes, but is not limited to, the following exemplary arrangements.
For example, the plurality of power supply lines 2 are arranged in parallel with each other, and the same number of rows of storage capacitors 1 are spaced between any two adjacent power supply lines 2. Specifically, referring to fig. 1, the power supply lines 2 are arranged along a column direction, a plurality of power supply lines 2 are uniformly arranged in the OLED display panel, each power supply line 2 overlaps one column of storage capacitors 1, or each power supply line 2 corresponds to one column of storage capacitors 1, and any two adjacent power supply lines 2 are spaced by the same column number of storage capacitors 1, for example, referring to fig. 1, two columns of storage capacitors 1 are uniformly spaced between any two adjacent power supply lines 2, that is, from the left side to the right side in fig. 1, two columns of storage capacitors 1 are spaced between a first power supply line 2 and a second power supply line 2, two columns of storage capacitors 1 are spaced between a second power supply line 2 and a third power supply line 2, and two columns of storage capacitors 1 are spaced between a third power supply line 2 and a fourth power supply line 2, the two columns of storage capacitors 1 are also spaced between the s-th power supply line 2 and the s + 1-th power supply line 2, and the two columns of storage capacitors 1 are also spaced between the penultimate power supply line 2 and the last power supply line 2, and at this time, each power supply line 2 is connected to the three columns of storage capacitors 1 in the row direction.
When the OLED display panel displays, when power supply lines 2 transmit power supply potentials to the storage capacitors 1, the difference of the power supply potentials received by the storage capacitors 1 at each part in the OLED display panel is lower, and the display effect of the OLED display panel is improved.
In the embodiment of the present invention, the plurality of power supply lines 2 may be arranged in such a manner that the plurality of power supply lines 2 are divided into a plurality of line groups 5, and the same number of rows of storage capacitors 1 are spaced between any two adjacent line groups 5. Specifically, referring to fig. 3 or 4, the power supply lines 2 are arranged along a column direction, the power supply lines 2 are divided into a plurality of line groups 5, and any two adjacent line groups 5 are spaced by the storage capacitors 1 in the same number of columns, for example, referring to fig. 3, two column storage capacitors 1 are spaced between any two adjacent line groups 5, that is, two column storage capacitors 1 are spaced between a first line group 5 and a second line group 5, two column storage capacitors 1 are spaced between a second line group 5 and a third line group 5, two column storage capacitors 1 are spaced between a third line group 5 and a fourth line group 5, two column storage capacitors 1 are also spaced between a p line group 5 and a p +1 line group 5, and two column storage capacitors 1 are also spaced between a penultimate line group 5 and a last line group 5. By such design, the power supply line 2 can be arranged according to the situation of each part in the OLED display panel, so that the stability of the power supply voltage transmitted to the storage capacitor 1 through the power supply line 2 is improved, and the display effect of the OLED display panel is improved.
When the plurality of power supply lines 2 are divided into a plurality of groups 5, the number of the power supply lines 2 in the group 5 may be set according to actual needs, for example, the number of the power supply lines 2 in each group 5 may be the same in the plurality of groups 5, for example, the number of the power supply lines 2 in each group 5 is two, or the number of the power supply lines 2 in each group 5 is three or more; in the plurality of line groups 5, the number of the power supply lines 2 in each line group 5 may be different, for example, the number of the power supply lines 2 in a part of the line groups 5 is one, the number of the power supply lines 2 in a part of the line groups 5 is two, and the number of the power supply lines 2 in a part of the line groups 5 is three or more.
When the plurality of power supply lines 2 are divided into a plurality of line groups 5, the power supply lines 2 in the line groups 5 may be arranged in various ways, for example, in the line groups 5, the number of the power supply lines 2 is multiple, and two adjacent power supply lines 2 in the line groups 5 correspond to two adjacent rows of storage capacitors 1, respectively, that is, the line group 5 includes a plurality of power supply lines 2, and the two adjacent power supply lines 2 are not separated by one row of storage capacitors 1 or multiple rows of storage capacitors 1. Specifically, referring to fig. 3, the power supply lines 2 are arranged along a column direction, the plurality of power supply lines 2 are divided into a plurality of line groups 5, two storage capacitors 1 are spaced between any two adjacent line groups 5, each line group 5 includes two power supply lines 2, in each line group 5, the two adjacent power supply lines 2 correspond to the two adjacent storage capacitors 1, for example, referring to fig. 3, from the left side to the right side in fig. 3, a first power supply line 2 in a first line group 5 corresponds to a first storage capacitor 1, and a second power supply line 2 in the first line group 5 corresponds to a second storage capacitor 1. By the design, the power supply lines 2 in the line group 5 are concentrated, the arrangement flexibility of the power supply lines 2 in the OLED display panel is improved, the stability of the power supply voltage transmitted to the storage capacitor 1 through the power supply lines 2 is improved, and the display effect of the OLED display panel is improved.
When the plurality of power supply lines 2 are divided into a plurality of line groups 5, the power supply lines 2 in the line groups 5 may be arranged in such a manner that the number of the power supply lines 2 in the line group 5 is plural, and at least one row of storage capacitors 1 is provided between two adjacent power supply lines 2 in the line group 5; the number of rows of the storage capacitors 1 spaced between two adjacent power supply lines 2 in the line group 5 is smaller than the number of rows of the storage capacitors 1 spaced between two adjacent line groups 5. Specifically, referring to fig. 4, the power supply lines 2 are arranged along columns, the plurality of power supply lines 2 are divided into a plurality of line groups 5, any two adjacent line groups 5 are separated by three storage capacitors 1, each line group 5 includes three power supply lines 2, in each line group 5, two adjacent power supply lines 2 are separated by one storage capacitor 1, for example, from the left side to the right side in fig. 4, a first line group 5 includes three power supply lines 2, a first power supply line 2 in the first line group 5 corresponds to the first storage capacitor 1, a second power supply line 2 in the first line group 5 corresponds to the third storage capacitor 1, a third power supply line 2 in the first line group 5 corresponds to the fifth storage capacitor 1, that is, in the first line group 5, a second storage capacitor 1 is separated between the first power supply line 2 and the second power supply line 2, a fourth column of storage capacitors 1 is provided between the second power supply line 2 and the third power supply line 2. By the design, the plurality of power supply lines 2 are densely and sparsely distributed in the OLED display panel, so that the power supply potential difference received by the storage capacitors 1 at each part in the OLED display panel is further reduced, and the display effect of the OLED display panel is improved.
It should be noted that when the plurality of power supply lines 2 are divided into a plurality of line groups 5, the arrangement of the power supply lines 2 in the line groups 5 may be combined with the above two ways, that is, the plurality of power supply lines 2 are divided into a plurality of line groups 5, any two adjacent line groups 5 have the same number of rows of storage capacitors 1, and each line group 5 includes a plurality of power supply lines 2; in a part of the line groups 5, two adjacent power supply lines 2 in the line group 5 respectively correspond to two adjacent rows of storage capacitors 1; in the remaining line groups 5, at least one row of storage capacitors 1 is provided between two adjacent power supply lines 2, and the number of rows of storage capacitors 1 provided between two adjacent power supply lines 2 is smaller than the number of rows of storage capacitors 1 provided between two adjacent line groups 5. By the design, the power supply lines 2 in the partial line groups 5 are concentrated, the power supply lines 2 in the partial line groups 5 are distributed in a loose mode, the arrangement flexibility of the power supply lines 2 in the OLED display panel is improved, the stability of power supply voltage transmitted to the storage capacitor 1 through the power supply lines 2 is improved, the display effect of the OLED display panel is improved, meanwhile, the power supply lines 2 are distributed densely and sparsely in the OLED display panel, the difference of power supply potentials received by the storage capacitors 1 at all parts in the OLED display panel is further reduced, and the display effect of the OLED display panel is improved.
In the above embodiment, in order to reduce the difference in the power supply potentials received by the storage capacitors 1 at each location in the OLED display panel, referring to fig. 1, in the OLED display panel provided in the embodiment of the present invention, at least a portion of two adjacent storage capacitors 1 are connected by the conductive line 3, the conductive line 3 or an extension line of the conductive line 3 may intersect with the power supply line 2, and preferably, in a direction perpendicular to the power supply line 2, at least a portion of two adjacent storage capacitors 1 are connected by the conductive line 3, that is, the conductive line 3 is preferably perpendicular to the power supply line 2. Therefore, the transmission distance of the power supply potential transmitted to the storage capacitor 1 can be shortened, the power supply potential difference received by the storage capacitor 1 at each part in the OLED display panel is reduced, and the display effect of the OLED display panel is improved.
In the above embodiment, in order to further improve the light transmission area ratio of the OLED display panel, in the OLED display panel provided in the embodiment of the present invention, the storage capacitors 1 in a plurality of rows parallel to the power supply line 2 are divided into a plurality of storage capacitor groups 4, and each storage capacitor group 4 is connected to one power supply line 2; in the storage capacitor group 4 including a plurality of rows of storage capacitors 1, two adjacent storage capacitors 1 are connected by a conductive line 3, the conductive line 3 or an extended line of the conductive line 3 may intersect the power supply line 2, and preferably, at least a part of two adjacent storage capacitors 1 are connected by the conductive line 3 in a direction perpendicular to the power supply line 2, that is, the conductive line 3 is preferably perpendicular to the power supply line 2. Specifically, referring to fig. 1, the power supply lines 2 are arranged in a column direction, a plurality of power supply lines 2 are uniformly arranged in the OLED display panel, each power supply line 2 overlaps one column of storage capacitors 1, that is, each power supply line 2 corresponds to one column of storage capacitors 1, two columns of storage capacitors 1 are uniformly spaced between any two adjacent power supply lines 2, from left to right in fig. 1, two columns of storage capacitors 1 are spaced between a first power supply line 2 and a second power supply line 2, two columns of storage capacitors 1 are spaced between a second power supply line 2 and a third power supply line 2, two columns of storage capacitors 1 are spaced between a third power supply line 2 and a fourth power supply line 2, two columns of storage capacitors 1 are also spaced between an s power supply line 2 and an s +1 power supply line 2, and two columns of storage capacitors 1 are also spaced between a last power supply line 2 and a last power supply line 2, at this time, along the row direction, each power supply line 2 is connected with three columns of storage capacitors 1; at this time, the storage capacitors 1 in multiple rows may be divided into multiple storage capacitor groups 4, for example, referring to fig. 1, from the left side to the right side of fig. 1, every three rows of storage capacitors 1 serve as one storage capacitor group 4, in the storage capacitor group 4, one row of storage capacitors 1 located in the middle corresponds to and is connected to the corresponding power supply line 2, and in the row direction, two adjacent storage capacitors 1 are connected by the conductive line 3, so that each storage capacitor 1 in the storage capacitor group 4 is connected to one power supply line 2, and the storage capacitors 1 in two adjacent storage capacitor groups 4 are not connected to each other. With such a design, the number of column-direction power supply lines 2 is reduced, and the number of row-direction power supply lines 2 is also reduced, thereby further improving the light transmission area ratio of the OLED display panel.
In the embodiment of the present invention, when the plurality of rows of storage capacitors 1 are divided into the plurality of storage capacitor groups 4, the vertical distance between any one row of storage capacitors 1 and the power supply line 2 connected to the row of storage capacitors 1 is the smallest, so that the vertical distance between any one storage capacitor 1 and the power supply line 2 connected to the storage capacitor 1 is the smallest, the transmission distance of the power voltage is reduced, the difference of the power potentials received by the storage capacitors 1 at various positions in the OLED display panel is reduced, and the display effect of the OLED display panel is improved. For example, please continue to participate in fig. 1, from the left side to the right side of fig. 1, every three columns of storage capacitors 1 are used as a storage capacitor group 4, each storage capacitor group 4 corresponds to a power supply line 2, the power supply line 2 corresponds to one column of storage capacitors 1 located in the middle of the corresponding storage capacitor group 4, the other two columns of storage capacitors 1 are respectively located at two sides of the power supply line 2, and correspond to one column of storage capacitors 1 located at the edge of the power supply line 2 and the corresponding storage capacitor group 4, and the other two columns of storage capacitors 1 are located at the same side of the power supply line 2, so that the vertical distance between each column of storage capacitors 1 and the corresponding power supply line 2 is minimized, that is, the vertical distance between each storage capacitor 1 and the corresponding power supply line 2 is minimized, so as to reduce the transmission distance of the power supply voltage and reduce the difference of the power supply potentials received by the storage capacitors 1 at various parts, the display effect of the OLED display panel is improved.
In the above embodiment, the storage capacitor 1 includes the electrode layers connected correspondingly to the power supply lines; the power supply line 2 and the electrode layer may be located on the same layer in the OLED display panel, and at this time, the power supply line 2 and the electrode layer may be made of the same material and formed through a one-step patterning process, so as to reduce the process steps for manufacturing the OLED display panel, improve the efficiency, and reduce the cost. Or, the power supply line 2 and the electrode layer may also be located at different levels in the OLED display panel, an insulating layer is disposed between the power supply line 2 and the electrode layer, and the power supply line 2 and the corresponding electrode layer are connected through a via hole formed in the insulating layer.
The embodiment of the invention also provides an OLED display device, which comprises the OLED display panel and a fingerprint identification device arranged on the back side of the OLED display panel.
The advantages of the OLED display device and the OLED display panel described in the above embodiments are the same as those of the OLED display panel in the prior art, and are not described herein again.
In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (9)
1. An OLED display panel comprises a plurality of sub-pixels arranged in an array, each sub-pixel is provided with a corresponding driving circuit, each driving circuit comprises a storage capacitor, and the OLED display panel is characterized by further comprising a plurality of power supply lines arranged along the column direction or the row direction, each power supply line corresponds to one row of storage capacitors parallel to the power supply line, and at least one power supply line is connected with at least two rows of storage capacitors parallel to the power supply line;
the plurality of power supply lines are divided into a plurality of line groups, each line group comprises a plurality of power supply lines, and at least one row of storage capacitors are arranged between two adjacent power supply lines in each line group; the number of rows of the storage capacitors spaced between two adjacent power supply lines in the line group is smaller than the number of rows of the storage capacitors spaced between two adjacent line groups.
2. The OLED display panel according to claim 1, wherein a plurality of the power supply lines are arranged in parallel with each other, and any two adjacent power supply lines are spaced by the same number of rows of the storage capacitors.
3. The OLED display panel of claim 1, wherein any two adjacent line groups are separated by the same number of rows of the storage capacitors.
4. The OLED display panel according to claim 3, wherein the line group comprises a plurality of the power supply lines, and two adjacent power supply lines in the line group respectively correspond to two adjacent rows of the storage capacitors.
5. The OLED display panel according to claim 1, wherein at least two of the storage capacitors adjacent to each other are connected by a conductive line, and the conductive line or an extension line of the conductive line intersects the power supply line.
6. The OLED display panel according to claim 1, wherein a plurality of rows of the storage capacitors parallel to the power supply line are divided into a plurality of storage capacitor groups, each of the storage capacitor groups being connected to one of the power supply lines;
in the storage capacitor group including a plurality of rows of the storage capacitors, two adjacent storage capacitors are connected by a conductive line, and the conductive line or an extension line of the conductive line intersects the power supply line.
7. The OLED display panel of claim 6, wherein the vertical distance between any row of the storage capacitors and the power supply line connecting the row of storage capacitors is minimized.
8. The OLED display panel of claim 1,
the storage capacitor includes an electrode layer connected to the power supply line; the power supply line and the electrode layers are located on the same layer, or the power supply line and the electrode layers are located on different layers, an insulating layer is arranged between the power supply line and the electrode layers, and the power supply line and the corresponding electrode layers are connected through via holes in the insulating layer.
9. An OLED display device comprising the OLED display panel according to any one of claims 1 to 8, and a fingerprint recognition device disposed on a back side of the OLED display panel.
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| CN111314517B (en) * | 2020-03-03 | 2022-03-01 | 惠州Tcl移动通信有限公司 | Display panel and mobile terminal |
| CN113096601B (en) * | 2021-04-07 | 2022-08-16 | 京东方科技集团股份有限公司 | Pixel driving circuit and display panel |
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