Organic light emitting display panel and display device

An organic light emitting display panel and a display device are provided. The organic light emitting display panel includes: an anode power wire, the anode power wire including a first extension segment and a second extension segment, a head end of the first extension segment being electrically connected to the driving power supply, a tail end of the first extension segment being electrically connected to a head end of the second extension segment; each sub-pixel includes a light emitting device and two pixel driving circuits, anode connection terminals of the two pixel driving circuits are electrically connected to an anode of the light emitting device; anode power wire connection terminals of the two pixel driving circuits are electrically connected to the first extension segment and the second extension segment, respectively.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application claims priority to Chinese Patent Application No. 201910375170.0, filed on May 7, 2019, the content of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the field of display technologies, and more particularly, to an organic light emitting display panel and a display device.

BACKGROUND

With the development of display technologies, an Organic Light Emitting Display (OLED) panel has more and more applications due to its excellent characteristics such as self-luminous, high brightness, wide viewing angle and fast response. The organic light emitting display panel includes a light emitting device, a pixel driving circuit corresponding to each light emitting device, and an anode signal wire. The pixel driving circuit is used to drive the light emitting device to emit light to realize display of sub-pixels. The anode signal wire extends from one end of the organic light emitting display panel to the other opposite end, for transferring an anode power supply voltage to each pixel driving circuit in a display region.

However, as resolution continues to increase, available space in the display region becomes smaller and smaller, and a signal wire width becomes smaller and smaller, such that a voltage drop greatly changes during transmission of the anode power supply voltage on the anode signal wire. A difference in anode power supply voltage values acquired by respective pixel driving circuits is relatively large, thereby causing a problem of uneven display brightness.

SUMMARY

Embodiments of the present disclosure provide an organic light emitting display panel and a display device, which can alleviate a problem of uneven display brightness caused by a voltage drop of an anode power supply voltage on a signal wire.

In one aspect, an embodiment of the present disclosure provides an organic light emitting display panel, the organic light emitting display panel having a display region and a first non-display region located at a side of the display region in a column direction, the organic light emitting display panel including:

a plurality of pixel driving circuits arranged in a matrix and located in the display region;

a driving power supply located in the first non-display region;

one or more anode power wires each comprising a first extension segment and a second extension segment, a head end of the first extension segment being electrically connected to the driving power supply, the first extension segment extending at least to a first position along the column direction, a tail end of the first extension segment being electrically connected to a head end of the second extension segment, the second extension segment extending at least to a second position along the column direction, wherein a row of pixel driving circuits of the plurality of pixel driving circuits in the display region that is farthest from the first non-display region is located at the first position, and a row of pixel driving circuits of the plurality of pixel driving circuits in the display region that is closest to the first non-display region is located at the second position; and

one or more first sub-pixel columns corresponding to the one or more anode power wire, each of the one or more first sub-pixel columns comprising a plurality of sub-pixels arranged in the column direction, each of the plurality of sub-pixels comprising a light emitting device and two pixel driving circuits of the plurality of pixel driving circuits, the light emitting device comprising a cathode, an organic light emitting layer and an anode that are disposed in a stacked manner, each of the two pixel driving circuits comprising an anode power wire connection terminal, an anode connection terminal, and a driving transistor connected in series between the anode power wire connection terminal and the anode connection terminal, wherein in the sub-pixel, the anode connection terminals of the two pixel driving circuits are electrically connected to the anode of the light emitting device;

wherein in each of the plurality of sub-pixels of each first sub-pixel column of the one or more first sub-pixel columns, the anode power wire connection terminals of the two pixel driving circuits are respectively electrically connected to the first extension segment and the second extension segment of one of the one or more anode power wires corresponding to the first sub-pixel column.

In another aspect, an embodiment of the present disclosure provides a display device including the organic light emitting display panel above.

In the organic light emitting display panel and the display device in the embodiments of the present disclosure, the same light emitting device is configured to be driven by two pixel driving circuits, and the two pixel driving circuits respectively obtain the anode power supply voltage from the first extension segment and the second extension segment. Transmission directions of the anode power supply voltage on the first extension segment and the second extension segment are opposite to each other, such that in the driving process of the light emitting device, the anode power supply voltage at the corresponding position on the first extension segment and the second extension segment is compensated. Thus, for different sub-pixels in the first sub-pixel column, brightness of the light emitting device are closer, i.e., the problem of uneven display brightness caused by the voltage drop of the anode power supply voltage on the signal wire is alleviated.

DESCRIPTION OF EMBODIMENTS

In order to better understand technical solutions of the present disclosure, the embodiments of the present disclosure are described in details with reference to the drawings. It should be clear that the described embodiments are merely part of the embodiments of the present disclosure rather than all of the embodiments. All other embodiments obtained by those skilled in the art without paying creative effort shall fall into the protection scope of the present disclosure.

The terms used in the embodiments of the present disclosure are merely for the purpose of describing particular embodiments and not intended to limit the present disclosure. Unless otherwise noted in the context, the singular form expressions “a”, “an”, “the” and “said” used in the embodiments and appended claims of the present disclosure are also intended to represent a plural form.

As shown inFIG. 1,FIG. 2andFIG. 3,FIG. 1is a structural schematic diagram of an organic light emitting display panel according to an embodiment of the present disclosure.FIG. 2is a cross-sectional structural schematic diagram of a sub-pixel inFIG. 1, andFIG. 3is an equivalent circuit diagram of a part of pixels in a first sub-pixel column inFIG. 1. An embodiment of the present disclosure provides an organic light emitting display panel, including: a display region1, and a first non-display region21located at a side of the display region1in a column direction y; pixel driving circuits3arranged in a matrix and located in the display region1; a driving power supply4located in the first non-display region21; anode power wires5, each of the anode power wires5including a first extension segment51and a second extension segment52, a head end of the first extension segment51being electrically connected to the driving power supply4, the first extension segment51extending at least to a first position L1along the column direction y, the first position L1being a position where a row of the pixel driving circuits3in the display region1that is farthest from the first non-display region21is located, i.e., a position where a first row of the pixel driving circuits3counting from top to bottom is located shown inFIG. 1, a tail end of the first extension segment51is electrically connected to a head end of the second extension segment52, the second extension segment52extending at least to a second position L2along the column direction y, the second position L2being a position where a row of the pixel driving circuits3in the display region1that is closest to the first non-display region21is located, i.e., a position where a last row of the pixel driving circuit3counting from top to bottom is located inFIG. 1; a first sub-pixel column61corresponding to the anode power wire5. The first sub-pixel column61includes a plurality of sub-pixels60arranged in the column direction y. Each of the sub-pixels60includes a light emitting device7(not shown inFIG. 1) and two pixel driving circuits3. Each of the light emitting devices7includes an anode71, an organic light emitting layer72, and a cathode73which are disposed in a stacked manner. Each of the pixel driving circuits3includes an anode power wire connection terminal PVDD, an anode connection terminal N, and a driving transistor Td connected in series between the anode power wire connection terminal PVDD and the anode connection terminal N. In the sub-pixel60, the anode connection terminals N of the two pixel driving circuits3are electrically connected to the anode71of the light emitting device7. In each of the sub-pixels60of the first sub-pixel column61, the anode power wire connection terminals PVDD of two pixel driving circuits3are electrically connected to the first extension segment51and the second extension segment52of the anode power wire5corresponding to the first sub-pixel column61, respectively.

For example, the display panel includes a buffer layer01, a semiconductor layer02, a gate insulation layer03, a gate metal layer04, a first interlayer insulation layer05, a capacitance metal layer06, a second interlayer insulation layer07, a source/drain metal layer08, a planarization layer09and a pixel defining layer10, which are sequentially stacked in a direction perpendicular to a plane in which the organic light emitting display panel is located. The pixel driving circuit3and the light emitting device7are further included, and the pixel driving circuit3is used to drive the light emitting device7. The pixel driving circuit3includes a thin film transistor and a storage capacitor C. The thin film transistor includes a driving transistor Td. A film structure of the following thin film transistor is described by taking the driving transistor Td as an example. The driving transistor Td includes an active layer M1, a gate M2, a source M3, and a drain M4. The active layer M1is located in the semiconductor layer02, and the gate M2is located in the gate metal layer04. The source M3and the drain M4are located in the source/drain metal layer08. The storage capacitor C includes a first electrode plate C1and a second electrode plate C2. The first electrode plate C1is located in the gate metal layer04, and the second electrode plate C2is located in the capacitance metal layer06. The pixel defining layer10is provided with openings, and each opening corresponds to one light emitting device7. The light emitting device7includes an anode71, an organic light emitting layer72and a cathode73, and the anodes71of the respective light emitting devices7are independent from each other. In a direction perpendicular to the organic light emitting display panel, the anode71overlaps the opening in the pixel defining layer10. The organic light emitting layer72is located in the opening of the pixel defining layer10, and a light emission area of the light emitting device7is defined by the opening of the pixel defining layer10. The cathode73covers each opening of the pixel defining layer10. In display region1, the cathode73may be a continuous structure over the entire surface. In the present embodiment, the drain M4of the driving transistor Td in the pixel driving circuit is electrically connected to the anode71of the corresponding light emitting device7through a via-hole, for supplying voltage to the anode71. Under an action of a voltage applied to the anode71and the cathode73, holes and electrons will be injected into the organic light emitting layer72and are recombined in the organic light emitting layer72so as to release energy to achieve light emission. Taking the pixel driving circuit3shown inFIG. 3as an example, the pixel driving circuit3shown inFIG. 3is a 2T1C structure. i.e., a structure including two thin film transistors and one capacitor. The pixel driving circuit3includes one switching transistor T, one driving transistor Td and one storage capacitor C. One terminal of a source and a drain in the driving transistor Td is electrically connected to the anode power wire connection terminal PVDD, and the other terminal of the source and the drain of the driving transistor Td is electrically connected to the anode connection terminal N. Two poles of the storage capacitor C are electrically connected to the anode power wire connection terminal PVDD and a gate of the driving transistor Td, respectively. One terminal of a source and a drain of the switching transistor T is electrically connected to the gate of the driving transistor Td, and the other terminal of the source and the drain of the switching transistor T is electrically connected to a data wire Vdata. A gate of the switching transistor T is electrically connected to a scanning wire S. Each of the first sub-pixel columns61corresponds to one data wire Vdata, and each row of the pixel driving circuits3corresponds to one scanning wire S. During a driving process of the organic light emitting display panel, a plurality of the scanning wires S sequentially provide a turn-on level, and the turn-on level is a control level for turning on the switching transistor T, to cause the pixel driving circuit3to enter a data writing state row by row. In a data writing state, the turn-on level on the row of the scanning wires S controls the switching transistor T to be turned on, and a data signal on the data wire Vdata is written in the gate of the driving transistor Td. The driving transistor Td generates a driving current under control of a gate voltage, and the driving current controls the light emitting device7to emit light, to realize a display of a color of the corresponding sub-pixel, thereby completing scanning of one row of the sub-pixels. Thereafter, this row of the scanning wires S is at a turn-off level, i.e., a control level for turning off the switching transistor T, at which the switching transistors T in this row of the pixel driving circuits3are all turned off. At this time, due to the action of the storage capacitor C, a gate voltage of the driving transistor Td is stored. At this time, a next row of the scanning wires S is at the turn-on level, i.e., the next row performs scanning accordingly. By analogy, after scanning of all the sub-pixels is completed, refresh of an image is achieved.

The relationship between the anode power wire5and the pixel driving circuit3will be further described below. For the same light emitting device7, it is driven by two pixel driving circuits3, in which one of the pixel driving circuits3obtains an anode power supply voltage by connecting to the first extension segment51and the other pixel driving circuit3obtains an anode power supply voltage by connecting to the second extension segment52. “X” inFIG. 1is used to indicate a position where the pixel driving circuit3and the anode power wire5are connected. The first extension segment51and the second extension segment52are electrically connected to each other by a bent connection wire structure at a side facing away from the driving power supply4, so that the anode power wire5has a U-shaped structure as a whole, in which the first extension segment51and the second extension segment52are respectively two arms of the U-shaped structure. For the anode power wire5, a signal source is obtained by driving the power source4. The signal is first transmitted through the first extension segment51in a direction facing away from the driving power supply4, and is then, at the tail end of the first extension segment51, transmitted through the second extension segment52in a direction close to the driving power supply4, and is finally transmitted to the tail end of the second extension segment52, i.e., an end of the second extension segment52closest to the driving power supply4. The anode voltage signal will generate a voltage drop during the transmission by the anode power wire5, i.e., at the anode power wire5, starting from the driving power supply4, a transmission path of the signal is negatively correlated with the voltage value on the anode power wire5, i.e., the longer the transmission path of the signal, the lower the voltage at that position on the anode power wire5. In the embodiment of the present disclosure, transmission directions of the anode power supply voltage on the first extension segment51and the second extension segment52are opposite to each other. In the same first sub-pixel column61, for two different sub-pixels60, although the anode power supply voltage obtained from the first extension segment51has a voltage drop, the anode power supply voltage obtained from the second extension segment52just has a voltage drop in an opposite direction, i.e., the anode power supply voltage drop on the second extension segment52can compensate for the anode power supply voltage drop on the first extension segment51, such that in the case where write voltages of the data wires Vdata are the same, the light emitting brightness of two different sub-pixels60are closer in the same first sub-pixel column61. For example, inFIG. 3, A1and A2are respectively two pixel driving circuits3corresponding to the same sub-pixel, and jointly drive the same light emitting device. A3and A4are respectively two pixel driving circuits3corresponding to another sub-pixel, and jointly drive the same light emitting device. An anode power supply voltage of 5.5V is obtained by A3from the first extension segment51, thereby driving the driving transistor Td in A3to obtain a corresponding driving current I3. An anode power supply voltage of 5.4V is obtained by A1from the first extension segment51, thereby driving the driving transistor Td in A1to obtain a corresponding driving current I1. An anode power supply voltage of 5.3V is obtained by A2from the second extension segment52, thereby driving the driving transistor Td in A2to obtain a corresponding driving current I2. An anode power supply voltage of 5.2V is obtained by A4from the second extension segment52, thereby driving the driving transistor Td in A4to obtain a corresponding driving current I4. A driving current of the light emitting device corresponding to A1and A2equals I1+I2, and a driving current of the light emitting device corresponding to A3and A4equals I3+I4, while the driving current is related to its corresponding anode power supply voltage, so that when the voltages on the data wires Vdata are the same, I1+I2=I3+I4, i.e., the light emitting brightness of the two light emitting devices are the same.

In the organic light emitting display panel of the embodiment of the present disclosure, the same light emitting device is configured to be driven by two pixel driving circuits, and the two pixel driving circuits respectively obtain the anode power supply voltage from the first extension segment and the second extension segment. Transmission directions of the anode power supply voltage on the first extension segment and the second extension segment are opposite to each other, such that in the driving process of the light emitting device, the anode power supply voltage at the corresponding position on the first extension segment and the second extension segment is compensated. Thus, for different sub-pixels in the first sub-pixel column, brightness of the light emitting device are closer, i.e., the problem of uneven display brightness caused by the voltage drop of the anode power supply voltage on the signal wire is alleviated.

Optionally, in each of the sub-pixels60, equivalent circuit structures of the two pixel driving circuits3are the same. When the two pixel driving circuits3in the same sub-pixel60are the same, a compensation effect on the anode power supply voltage is better.

Optionally, in each of the sub-pixels60, the two pixel driving circuits3are of mirror-image structures. For two identical pixel driving circuits3, when the two are mirror-image structures, a layout is relatively simple, and the anode power wire5of a “U” structure can be better utilized to improve a space utilization rate.

Optionally, in each of the sub-pixels60, the two pixel driving circuits3are electrically connected to the same data wire Vdata. Since the two pixel driving circuits3in each sub-pixel60have the same structure and are of mirror-image structures, the two pixel driving circuits3can be driven by the same data voltage. At this time, by arranging the two pixel driving circuits3to be electrically connected to the same data wire Vdata, number of the signal wires in the layout can be further reduced, thereby improving the space utilization rate.

Optionally, as shown inFIG. 1,FIG. 3andFIG. 4,FIG. 4is another cross-sectional structural schematic diagram of one sub-pixel inFIG. 1. In each of the sub-pixels60, the anode71of the light emitting device7has an uninterrupted continuous structure.

In the same sub-pixel60, the two anode connection terminals N of the two pixel driving circuits3are electrically connected to the same node. At this time, a driving current value of the light emitting device7is equal to a sum of driving current values generated by the driving transistors Td of the two pixel driving circuits3. Through a compensation action of the voltage drop of the anode power supply voltage on the first extension segment and the second extension segment, in the case where the data voltage provided by the data wire Vdata is constant, for the same column of the sub-pixels60, different light emitting devices7correspond to the same driving currents, i.e., the light emitting brightness of the different light emitting devices7are the same.

Optionally, as shown inFIG. 1,FIG. 2andFIG. 3, in each sub-pixel60, the anode71of the light emitting device7includes a first anode711and a second anode712. The first anode711and the second anode712are spaced apart from each other, and the anode connection terminals N of the two pixel driving circuits3are electrically connected to the first anode711and the second anode712, respectively.

Although the anode71of the light emitting device7is respectively the first anode711and the second anode712that are independent from each other, since both the first anode711and the second anode712constitute the same light emitting device7together with the cathode73, it can still be understood that the driving current value corresponding to the light emitting device7is equal to the sum of the driving current values generated by the driving transistors Td of the two pixel driving circuits3. Through the compensation action of the voltage drop of the anode power supply voltage on the first extension segment and the second extension segment, in the case where the data voltage supplied from the data wire Vdata is constant, for the same column of the sub-pixels60, different light emitting devices7correspond to the same driving current, i.e., the light emitting brightness of the different light emitting devices7are the same. It can also be understood that the light emitting device7is divided into two independent light emitting sub-devices, corresponding to the first anode711and the second anode712, respectively. The brightness of one of the light emitting sub-devices is determined by a value of the driving current generated by the drive transistor Td of one of the pixel driving circuits3, and the brightness of the other light emitting sub-device is determined by a value of the driving current generated by the driving transistor Td of the driving transistor3of the other one of the pixel driving circuit3. However, overall light emitting brightness of the two light emitting sub-devices are related to the driving currents of the two pixel driving circuits3. Therefore, through the compensation action of the voltage drop of the anode power supply voltage on the first extension segment and the second extension segment, in the case where the data voltage supplied from the data wire Vdata is constant, the different light emitting devices7have closer brightness for the same column of the sub-pixels60.

Optionally, as shown inFIG. 1, the above organic light emitting display panel includes a plurality of anode power wires5arranged in a row direction x. Each of the anode power wires5corresponds to one first sub-pixel column61, and the row direction x is perpendicular to the column direction y.

Optionally, as shown inFIG. 5andFIG. 6,FIG. 5is a structural schematic diagram of another organic light emitting display panel according to an embodiment of the present disclosure, andFIG. 6is a partially enlarged schematic diagram of a partial region inFIG. 5. The above organic light emitting display panel further includes a plurality of second sub-pixel columns62arranged in the row direction x, and one second sub-pixel column62is disposed between every two adjacent first sub-pixel columns61. The second sub-pixel column62includes a plurality of sub-pixels60arranged in the column direction y. Each of the sub-pixels60includes a light emitting device (not shown inFIG. 5andFIG. 6) and two pixel driving circuits3. Each of the light emitting devices includes a cathode, an organic light emitting layer and an anode which are disposed in a stack manner. A film structure of the light emitting device in the second sub-pixel column62is the same as a film structure of the light emitting device in the first sub-pixel column61. Referring to the structure of the light emitting device inFIG. 2orFIG. 4, each pixel driving circuit3includes an anode power wire connection terminal PVDD, an anode connection terminal N, and a driving transistor Td connected in series between the anode power wire connection terminal PVDD and the anode connection terminal N. In the sub-pixel60, both the anode connection terminals N of the two pixel driving circuits3are electrically connected to the anode of the light emitting device. For each second sub-pixel column62, the two first sub-pixel columns61adjacent to the second sub-pixel column62in the row direction x are a first adjacent sub-pixel column601and a second adjacent sub-pixel column602, respectively. An anode power wire5corresponding to the first adjacent sub-pixel column601is a first adjacent anode power wire501, and an anode power wire5corresponding to the second adjacent sub-pixel column602is a second adjacent anode power wire502. In each of the sub-pixels60of each of the second sub-pixel columns62, the anode power wire connection terminals PVDD of the two pixel driving circuits3are electrically connected to the first extension segment51of the first adjacent anode power wire501and the second extension segment52of the second adjacent anode power wire502, respectively.

In some embodiments, a specific structure of the second sub-pixel column62may be similar to a specific structure of the first sub-pixel column61in the above embodiments, one difference being that each of the first sub-pixel columns61is individually provided with a corresponding anode power wire5, while the second sub-pixel column62is not provided with an individual anode power wire5, and the pixel driving circuit3in the second sub-pixel column62shares the anode power wire5with the adjacent first sub-pixel column61, for example, as the structure shown inFIG. 6. In some embodiments, the foregoing difference is the only difference between the specific structure of the second sub-pixel column62and the specific structure of the first sub-pixel column61. In one sub-pixel60in the second sub-pixel column62, an anode power wire connection terminal PVDD of one pixel driving circuit3is electrically connected to the second extension segment52corresponding to the first sub-pixel column61adjacent to the left side, and an anode power wire connection terminal PVDD of the other pixel driving circuit3is electrically connected to the first extension segment51corresponding to the first sub-pixel column61adjacent to the right side. Two pixel driving circuits3in the same sub-pixel60are respectively connected to two anode power wires5, and correspondingly connected to the first extension segment51and the second extension segment52therein. The first extension segment51and the second extension segment52belong to different anode power wires5, respectively, however, they both transmit the same anode power supply voltage signal, and the anode power supply voltage signals are transmitted in opposite directions. Therefore, the anode power supply voltages obtained by the second sub-pixel column62from the first extension segment51and the second extension segment52have voltage drops in opposite directions. The anode power supply voltage drop on the second extension segment52can also compensate for the anode power supply voltage drop on the first extension segment51. The specific compensation principle is the same as that in the case where the anode power supply voltages are obtained from the same anode power wire5in the first sub-pixel column61, which will not be described again. Therefore, compared with the structure shown inFIG. 1, both the structures shown inFIG. 5andFIG. 6can make the light emitting brightness of different sub-pixels in the same column of sub-pixels closer to each other, i.e., the problem of uneven display brightness due to the voltage drop of the anode power supply voltage on the signal wire is alleviated. Moreover, due to the multiplexing of the anode power wire5, the number of anode power wires5is reduced, thereby increasing the space utilization rate of the display panel.

Optionally, as shown inFIG. 1andFIG. 5, in the display region1, the plurality of anode power wires5are insulated from each other, so as to ensure that different anode power wires5do not have the same potentials between the display regions1and cause the same anode power wire5to have a corresponding change in the voltage drop in the display regions1, thereby utilizing the change in the voltage drop more effectively to compensate for the anode power supply voltage by the action of the first extension segment51and the second extension segment52.

Optionally, as shown inFIG. 1andFIG. 5, the tail end of the second extension segment52of each anode power wire5is suspended, which reduces the space occupied by the signal wires while ensuring that the anode power supply voltage signal has voltage drops in opposite directions on the second extension segment52and the first extension segment51.

Optionally, as shown inFIG. 7, the tail ends of the second extension segments52of the plurality of anode power wires5are electrically connected to each other. The tail ends of the second extension segments52of different anode power wires5are electrically connected to each other. However, it is necessary to ensure insulation between the tail end of the second extension segment52and the driving power supply4, so as to ensure that the anode power supply voltage is compensated by the first extension segment51and the second extension segment52. Electrically connecting the tail ends of the second extension segments52of the plurality of anode power wires5to each other can make the voltage between the second extension segments52of the different anode power wires5consistent, further alleviating the problem of uneven brightness of the different sub-pixels60in the row direction x.

Optionally, as shown inFIG. 8,FIG. 8is a structural schematic diagram of an organic light emitting display panel according to an embodiment of the present disclosure. The organic light emitting display panel further includes a second non-display region22at a side of the display region1facing away from the first non-display region21in the column direction y. The first extension segment51passes through the display region1in the column direction y and extends to the second non-display region22, and the tail end of the first extension segment51is electrically connected to the head end of the second extension segment52in the second non-display region22. By arranging the tail end of the first extension segment51to be connected with the head end of the second extension segment52in the second non-display region22through a bent signal wire, the space utilization rate of the display region1can be improved.

Optionally, as shown inFIG. 8, the second extension segment52extends in the column direction y to the first non-display region21.

In addition, the pixel driving circuit3of the 2T1C structure is illustrated inFIG. 3andFIG. 6. The specific structure of the pixel driving circuit is not limited in the embodiment of the present disclosure, and the pixel driving circuit may also be of other structures. For example, as shown inFIG. 9,FIG. 9is a structural schematic diagram of another pixel driving circuit according to an embodiment of the present disclosure. The pixel driving circuit3shown inFIG. 9is a 7T1C structure, i.e., including seven thin film transistors and one capacitor, wherein there is one driving transistor Td and six switching transistors. A gate of the driving transistor Td is electrically connected to the first node N1, and one terminal of the source and the drain thereof is electrically connected to a second node N2, and the other terminal thereof is electrically connected to a third node N3; a gate of the first switching transistor T1is electrically connected to a light emitting control terminal Emit, and one terminal of the source and the drain is electrically connected to the anode power wire connection terminal PVDD, and the other terminal thereof is electrically connected to the second node N2; a gate of the second switching transistor T2is electrically connected to a second scanning terminal S2, and one terminal of the source and the drain is electrically connected to the data wire Vdata and the other terminal thereof is electrically connected to the second node N2; a gate of the third switching transistor T3is electrically connected to the second scanning terminal S2, and one terminal of the source and the drain is electrically connected to the first node N1, and the other terminal thereof is electrically connected to the third node N3; a gate of the fourth switching transistor T4is electrically connected to a first scanning terminal S1, and one terminal of the source and the drain is electrically connected to a reference voltage terminal Vref and the other terminal thereof is electrically connected to the first node N1; a gate of the fifth switching transistor T5is electrically connected to the light emitting control terminal Emit, and one terminal of the source and the drain is electrically connected to the third node N3and the other terminal thereof is electrically connected to the anode connection terminal N; a gate of the sixth switching transistor T6is electrically connected to the first scanning terminal S1, and one terminal of the source and the drain is electrically connected to the reference voltage terminal Vref and the other terminal thereof is electrically connected to the anode connection terminal N; the two poles of the storage capacitor C are electrically connected to the anode power wire connection terminal PVDD and the first node N1, respectively. As shown inFIG. 10,FIG. 10is a structural schematic diagram of another pixel driving circuit according to an embodiment of the present disclosure. The pixel driving circuit3shown inFIG. 10is a 6T1C structure, i.e., includes six thin film transistors and one capacitor, of which one is driving transistor Td and the other five are switching transistors. The gate of the driving transistor Td is electrically connected to the second node N2, and one terminal of the source and the drain is electrically connected to the first node N1, and the other terminal thereof is electrically connected to the third node N3; the gate of the first switching transistor T1is electrically connected to the first scanning terminal S1, and one terminal of the source and the drain is electrically connected to the data wire Vdata, and the other terminal thereof is electrically connected to a fourth node N4; the gate of the second switching transistor T2is electrically connected to the second scanning terminal S2, and one terminal of the source and the drain is electrically connected to the reference voltage terminal Vref, and the other terminal thereof is electrically connected to the fourth node N4; the gate of the third switching transistor T3is electrically connected to the first scanning terminal S1, and one terminal of the source and the drain is electrically connected to the second node N2, and the other terminal thereof is electrically connected to the third node N3; the gate of the fourth switching transistor T4is electrically connected to a third scanning terminal S3, and one terminal of the source and the drain is electrically connected to the third node N3, and the other terminal thereof is electrically connected to the anode connection terminal N; the gate of the fifth switching transistor T5is electrically connected to a fourth scanning terminal S4, and one terminal of the source and the drain is electrically connected to the anode power wire connection terminal PVDD, and the other terminal thereof is electrically connected to the first node N1; the two poles of the storage capacitor C are electrically connected to the second node N2and the fourth node N4, respectively. It can be seen that the driving transistor Td is connected in series between the anode power wire connection terminal PVDD and the anode connection terminal N, regardless of the type of the pixel driving circuit.

As shown inFIG. 11,FIG. 11is a structural schematic diagram of a display device according to an embodiment of the present disclosure. The embodiment of the present disclosure further provides a display device including the organic light emitting display panel100above.

The specific structure of the display panel100is the same as that in the foregoing embodiments, and details are not described herein again. The display device may be any electronic device having a display function such as a mobile phone, a tablet computer, a laptop computer, an electronic paper book, or a television.

In the display device of the embodiment of the present disclosure, the same light emitting device is configured to be driven by two pixel driving circuits, and the two pixel driving circuits respectively obtain the anode power supply voltage from the first extension segment and the second extension segment. Transmission directions of the anode power supply voltage on the first extension segment and the second extension segment are opposite to each other, such that in the driving process of the light emitting device, the anode power supply voltage at the corresponding position on the first extension segment and at the second extension segment is mutually compensated. Thus, for different sub-pixels in the first sub-pixel column, brightness of the light emitting device are closer, i.e., the problem of uneven display brightness caused by the voltage drop of the anode power supply voltage on the signal wire is alleviated.

The above are only the preferred embodiments of the present disclosure and are not intended to limit the present disclosure. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present disclosure, should be included in the scope of the present disclosure.

The above-described embodiments are representative of the present disclosure; but the invention is not limited to such embodiments. Although the present disclosure has been described in detail with reference to the above-described embodiments, it should be understood by those skilled in the art that, it is still possible to modify the technical solutions described in the above embodiments or to equivalently replace some or all of the technical features therein, but these modifications or replacements do not cause the essence of corresponding technical solutions to depart from the scope of the present disclosure.