CN112967658A

CN112967658A - Pixel circuit, light-emitting panel and display device

Info

Publication number: CN112967658A
Application number: CN202110220294.9A
Authority: CN
Inventors: 东强; 孙晓平; 马从华; 王丽花
Original assignee: Xiamen Tianma Microelectronics Co Ltd
Current assignee: Xiamen Tianma Microelectronics Co Ltd
Priority date: 2021-02-26
Filing date: 2021-02-26
Publication date: 2021-06-15
Anticipated expiration: 2041-02-26
Also published as: CN112967658B

Abstract

The invention discloses a pixel circuit, a light-emitting panel and a display device. The pixel circuit comprises a first power input module, a second power input module and a light-emitting control module, the first power input module comprises at least two first power input units, the second power input module comprises at least two second power input units, the light-emitting control module and a first light-emitting element are arranged between the output end of the first power input unit and the output end of the second power input unit in series, and the light-emitting control module and a second light-emitting element are arranged between the output end of the first power input unit and the output end of the second power input unit in series. The pixel circuit, the light-emitting panel and the display device provided by the invention do not need a threshold compensation circuit or an external compensation circuit, have simple structures, reduce the cost and the power consumption, reduce the design requirements of a power supply, and solve the problems of high complexity, high cost, high power consumption and high difficulty in power supply design of a pixel driving circuit in the prior art.

Description

Pixel circuit, light-emitting panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a pixel circuit, a light-emitting panel and a display device.

Background

With the rapid development of electronic technology, display devices have been widely used in people's lives, such as mobile phones, computers, tablets, and the like.

In the conventional display device, one pixel driving circuit is provided for each pixel, and the conventional pixel driving circuit requires a complicated threshold compensation circuit or an external compensation circuit, so that the pixel driving circuit having a plurality of thin film transistors, such as 7T1C and 16T1C (T refers to a thin film transistor and C refers to a storage capacitor), is generally adopted, and has complicated circuit, high cost and high power consumption (large consumption on the thin film transistor), and the conventional power supply IC design is difficult to support the power supply requirement required by the pixel driving circuit.

Disclosure of Invention

The invention provides a pixel circuit, a light-emitting panel and a display device, which aim to reduce cost and power consumption.

In a first aspect, an embodiment of the present invention provides a pixel circuit, including a first power input module, a second power input module, and a light-emitting control module;

the first power input module comprises at least two first power input units, and the at least two first power input units comprise a first power input unit A and a first power input unit B;

the second power input module comprises at least two second power input units, and the at least two second power input units comprise a second power input unit and a second power input unit;

the light-emitting control module and the first light-emitting element are arranged between the output end of the first power input unit and the output end of the second power input unit in series, and enabling stages of the first power input unit and the second power input unit are at least partially overlapped;

the light emitting control module and the second light emitting element are arranged between the output end of the first second power input unit and the output end of the second power input unit in series, and the enabling stages of the first second power input unit and the second power input unit are at least partially overlapped; and enabling stages of the first power input unit A and the first power input unit B are not overlapped.

In a second aspect, an embodiment of the present invention further provides a light-emitting panel including a light-emitting region and a non-light-emitting region surrounding the light-emitting region, in which the pixel circuit according to the first aspect is disposed;

the light-emitting area is also provided with scanning lines and light-emitting control signal lines, the scanning lines and the light-emitting control signal lines are distributed in a crossed manner to define a plurality of sub-light-emitting areas, and each sub-light-emitting area is provided with one pixel circuit;

the non-luminous area is provided with a scanning drive circuit and a luminous control circuit, the scanning lines are respectively and electrically connected with the scanning drive circuit and the pixel circuit, and the luminous control signal lines are respectively and electrically connected with the luminous control circuit and the pixel circuit.

In a third aspect, embodiments of the present invention further provide a display device including the light-emitting panel of the second aspect.

The pixel circuit, the light-emitting panel and the display device provided by the embodiment of the invention are provided with the first power input module, the second power input module and the light-emitting control module, wherein the first power input module comprises at least two first power input units so as to output a first power supply in an enabling stage, and the second power input module comprises at least two second power input units so as to output a second power supply in the enabling stage. The at least two first power input units comprise a first power input unit and a first second power input unit, the at least two second power input units comprise a second first power input unit and a second power input unit, the first power input unit and the first light-emitting element are arranged between the output end of the first power input unit and the output end of the second first power input unit in series through design, enabling stages of the first power input unit and the second first power input unit are at least partially overlapped, the first power input unit and the second first light input unit can provide a first power and a second power for the first light-emitting element at the same time, and the light-emitting control module can control the first light-emitting element to emit light to achieve display. The light-emitting control module and the second light-emitting element are designed to be arranged between the output end of the first second power input unit and the output end of the second power input unit in series, and the enabling stages of the first second power input unit and the second power input unit are at least partially overlapped, so that the first second power input unit and the second power input unit can provide a first power and a second power for the second light-emitting element at the same time, and the light-emitting control module can control the second light-emitting element to emit light to realize display. The pixel circuit design does not need a threshold compensation circuit or an external compensation circuit, has a simple structure, is easy to realize, and is beneficial to reducing the cost and the power consumption and reducing the design requirement on a power supply. Meanwhile, the pixel circuit provided by the embodiment of the invention has the advantages that the enabling stages of the first power input unit A and the first power input unit B are not overlapped, so that the light-emitting control module can control the first light-emitting element and the second light-emitting element to emit light in a time-sharing manner, the first light-emitting element and the second light-emitting element share one light-emitting control module, the number of light-emitting control modules is reduced, the cost and the power consumption are further reduced, the design requirement on the power supply is greatly reduced, and the problems of high complexity, high cost, high power consumption and high power supply design difficulty of a pixel driving circuit in the prior art are solved.

Drawings

Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;

FIG. 4 is a diagram illustrating a scan signal according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention;

fig. 8 is a schematic diagram of a light-emitting control signal according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a light-emitting panel according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is a schematic structural diagram of a pixel circuit according to an embodiment of the present invention, and as shown in fig. 1, the pixel circuit according to the embodiment of the present invention includes a first power input module 10, a second power input module 11, and a light-emitting control module 12. The first power input module 10 includes at least two first power input units 101, and the at least two first power input units 101 include a first power input unit 101a and a first second power input unit 101 b. The second power input module 11 includes at least two second power input units 111, and the at least two second power input units 111 include a second power input unit 111a and a second power input unit 111 b. The light emission control module 12 and the first light emitting element 13a are disposed in series between the output terminal 21a of the first power input unit 101a and the output terminal 22a of the second power input unit 111a, and the enable stages of the first power input unit 101a and the second power input unit 111a at least partially overlap. The light emission control module 12 and the second light emitting element 13b are disposed in series between the output end 21b of the first second power input unit 101b and the output end 22b of the second power input unit 111b, the enabling stages of the first second power input unit 101b and the second power input unit 111b are at least partially overlapped, and the enabling stages of the first power input unit 101a and the first second power input unit 101b are not overlapped.

Specifically, as shown in fig. 1, the first power input module 10 includes at least two first power input units 101, the first power input units 101 are configured to output a first power during an enable phase, the second power input module 11 includes at least two second power input units 111, and the second power input units 111 are configured to output a second power during the enable phase.

With continued reference to fig. 1, taking as an example that the first power input module 10 includes two first power input units 101, and the second power input module 11 includes two second power input units 111, the first power input units 101 may include a first power input unit 101a and a first second power input unit 101b, and the second power input units 111 may include a second power input unit 111a and a second power input unit 111 b.

With continued reference to fig. 1, the light-emitting control module 12 and the first light-emitting element 13a are serially disposed between the output terminal 21a of the first power input unit 101a and the output terminal 22a of the second first power input unit 111a, wherein when the first power input unit 101a is in the enabling stage, the output terminal 21a of the first power input unit 101a provides the first power to the first light-emitting element 13 a; when the second power input unit 111a is in the enable stage, the output terminal 22a of the second power input unit 111a supplies the second power to the first light emitting element 13 a. By setting the enabling phases of the first power input unit 101a and the second power input unit 111a to overlap at least partially, the first power input unit 101a and the second power input unit 111a can simultaneously supply the first power and the second power to the first light emitting element 13a, and at this time, the light emitting control module 12 can control the current to flow through the first light emitting element 13a, so that the first light emitting element 13a emits light to realize display. Compared with the existing pixel driving circuit, the pixel circuit design has the advantages of simple structure, easiness in realization and contribution to reducing the cost and the power consumption, thereby reducing the design requirement on a power supply.

With continued reference to fig. 1, the light-emitting control module 12 and the second light-emitting element 13b are serially disposed between the output terminal 21b of the first second power input unit 101b and the output terminal 22b of the second power input unit 111b, wherein when the first second power input unit 101b is in the enabling stage, the output terminal 21b of the first second power input unit 101b provides the first power to the second light-emitting element 13 b; when the second power input unit 111b is in the enable stage, the output terminal 22b of the second power input unit 111b supplies the second power to the second light emitting element 13 b. By setting the enabling phases of the first second power input unit 101b and the second power input unit 111b to at least partially overlap, the first second power input unit 101b and the second power input unit 111b can simultaneously provide the first power and the second power to the second light emitting element 13b, and at this time, the light emitting control module 12 can control the current to flow through the second light emitting element 13b, so that the second light emitting element 13b emits light to realize display. Compared with the existing pixel driving circuit, the pixel circuit design has the advantages of simple structure, easiness in realization and contribution to reducing the cost and the power consumption, thereby reducing the design requirement on a power supply.

With reference to fig. 1, by setting that the enabling stages of the first power input unit 101a and the first power input unit 101b are not overlapped, the light-emitting control module 12 can control the first light-emitting element 13a and the second light-emitting element 13b to emit light in a time-sharing manner, so that the first light-emitting element 13a and the second light-emitting element 13b share one light-emitting control module 12, the number of the light-emitting control modules 12 is reduced, which is beneficial to further reducing the cost and the power consumption, and meanwhile, the power consumption of the pixel circuit is further reduced, the requirements for the power supply to supply current and voltage are also reduced, so that the design requirements for the power supply can be greatly reduced.

It should be noted that the first power input module 10 may further include more first power input units 101, and the second power input module 11 may also include more second power input units 111, which may be set by those skilled in the art according to actual needs, and the embodiment of the present invention is not limited thereto.

The pixel circuit provided by the embodiment of the present invention is provided with a first power input module 10, a second power input module 11 and a light emitting control module 12, wherein the first power input module 10 includes at least two first power input units 101 to output a first power in an enable phase, and the second power input module 11 includes at least two second power input units 111 to output a second power in the enable phase. Wherein the at least two first power input units 101 include a first power input unit 101a and a first power input unit 101b, the at least two second power input units 111 include a second power input unit 111a and a second power input unit 111b, by designing the light emission control module 12 and the first light emitting element 13a to be disposed in series between the output terminal 21a of the first power input unit 101a and the output terminal 22a of the second power input unit 111a, and the enabling stages of the first power input unit 101a and the second power input unit 111a at least partially overlap, so that the first power input unit 101a and the second power input unit 111a can simultaneously supply the first power and the second power to the first light emitting element 13a, thereby enabling the light emission control module 12 to control the first light emitting element 13a to emit light to realize display. By designing the light-emitting control module 12 and the second light-emitting element 13b to be arranged in series between the output end 21b of the first second power input unit 101b and the output end 22b of the second power input unit 111b, and enabling stages of the first second power input unit 101b and the second power input unit 111b are at least partially overlapped, the first second power input unit 101b and the second power input unit 111b can simultaneously provide the first power and the second power to the second light-emitting element 13b, and further the light-emitting control module 12 can control the second light-emitting element 13b to emit light to realize display. The pixel circuit design does not need a threshold compensation circuit or an external compensation circuit, has a simple structure, is easy to realize, and is beneficial to reducing the cost and the power consumption and reducing the design requirement on a power supply. Meanwhile, the pixel circuit provided by the embodiment of the invention has the advantages that the enabling stages of the first power input unit 101a and the first second power input unit 101b are not overlapped, so that the light-emitting control module 12 can control the first light-emitting element 13a and the second light-emitting element 13b to emit light in a time-sharing manner, the first light-emitting element 13a and the second light-emitting element 13b share one light-emitting control module 12, the number of the light-emitting control modules 12 is reduced, the cost and the power consumption are further reduced, the design requirement on the power supply is greatly reduced, and the problems of high complexity, high cost, high power consumption and high power design difficulty of a pixel driving circuit in the prior art are solved.

With reference to fig. 1, optionally, the first electrode 131a of the first light emitting element 13a is electrically connected to the output end 21a of the first power input unit 101a, and the second electrode 132a of the first light emitting element 13a, the output end 22b of the second power input unit 111b and the first end 121 of the light emitting control module 12 are connected to the first node 31. The first electrode 131b of the second light emitting device 13b is electrically connected to the output terminal 21b of the first power input unit 101b, and the second electrode 132b of the second light emitting device 13b, the output terminal 22a of the second power input unit 111a, and the second terminal 122 of the light emission control module 12 are connected to the second node 32. The control terminal 123 of the light emission control module 12 is connected to the light emission control signal 33, and the light emission control module 12 is configured to provide a driving current to the light emitting element 13.

As shown in fig. 1, with the above connection relationship, when the first power input unit 101a and the second power input unit 111a are in the enabled stage, the first power input unit 101a, the first light emitting element 13a, the light emitting control module 12, and the second power input unit 111a form a conducting loop, and at this time, the light emitting control module 12 controls the light emitting element 13 to emit light by controlling the driving current supplied to the first light emitting element 13 a. When the first second power input unit 101b and the second power input unit 111b are in the enabled stage, the first second power input unit 101b, the second light emitting element 13b, the light emitting control module 12 and the second power input unit 111b form a conducting loop, and the light emitting control module 12 controls the light emitting element 13 to emit light by controlling the driving current supplied to the second light emitting element 13 b. The pixel circuit provided by the embodiment of the invention has a simple structure and is easy to realize.

With continued reference to fig. 1, optionally, the first electrode 131 is an anode and the second electrode 132 is a cathode; alternatively, the first electrode 131 is a cathode and the second electrode 132 is an anode.

For example, as shown in fig. 1, taking the first electrode 131 as an anode and the second electrode 132 as a cathode as an example, the first electrode 131a of the first light emitting element 13a is electrically connected to the output end 21a of the first power input unit 101a, and the second electrode 132a of the first light emitting element 13a is electrically connected to the first node 31; the first electrode 131b of the second light emitting element 13b is electrically connected to the output terminal 21b of the first b power input unit 101b, and the second electrode 132b of the second light emitting element 13b is electrically connected to the second node 32.

With reference to fig. 1, when the first power input unit 101a and the second power input unit 111a are in the enabling stage, the first power input unit 101a, the first light emitting element 13a, the light emitting control module 12 and the second power input unit 111a sequentially form a conducting loop, and at this time, the first power output by the output end 21a of the first power input unit 101a sequentially passes through the first electrode 131a (anode) of the first light emitting element 13a, the second electrode 132a (cathode) of the first light emitting element 13a, the light emitting control module 12 and the second power input unit 111a, that is, current sequentially flows through the anode and the cathode of the first light emitting element 13a, so as to realize the light emission of the first light emitting element 13 a.

With reference to fig. 1, when the first second power input unit 101b and the second power input unit 111b are in the enabling stage, the first second power input unit 101b, the second light emitting element 13b, the light emitting control module 12 and the second power input unit 111b sequentially form a conducting loop, and at this time, the first power output by the output end 21b of the first second power input unit 101b sequentially passes through the first electrode 131b (anode) of the second light emitting element 13b, the second electrode 132b (cathode) of the second light emitting element 13b, the light emitting control module 12 and the second power input unit 111b, that is, the current sequentially passes through the anode and the cathode of the second light emitting element 13b, so as to realize the light emission of the second light emitting element 13 b. The first power source may be a PVDD voltage, and the second power source may be a PVEE voltage.

In another embodiment, the first electrode 131 may be a cathode and the second electrode 132 may be an anode, which will be described below with reference to an embodiment.

Fig. 2 is a schematic structural diagram of another pixel circuit according to an embodiment of the invention, as shown in fig. 2, exemplarily, a first electrode 131 is taken as a cathode, a second electrode 132 is taken as an anode, when the first power input unit 101a and the second power input unit 111a are in the enable stage, the second power input unit 111a, the light-emitting control module 12, the first light-emitting element 13a, and the first power input unit 101a constitute a conduction loop in this order, and at this time, the second power outputted from the output terminal 22a of the second power input unit 111a sequentially passes through the light emission control module 12, the second electrode 132a (anode) of the first light emitting element 13a, the first electrode 131a (cathode) of the first light emitting element 13a and the first power input unit 101a, that is, current flows through the anode and the cathode of the first light emitting element 13a in order to realize the light emission of the first light emitting element 13 a.

With reference to fig. 2, when the first second power input unit 101b and the second power input unit 111b are in the enabling stage, the second power input unit 111b, the light-emitting control module 12, the second light-emitting element 13b and the first second power input unit 101b sequentially form a conducting loop, and at this time, the second power output by the output end 22b of the second power input unit 111b sequentially passes through the light-emitting control module 12, the second electrode 132b (anode) of the second light-emitting element 13b, the first electrode 131b (cathode) of the second light-emitting element 13b and the first second power input unit 101b, that is, the current sequentially flows through the anode and the cathode of the second light-emitting element 13b, so as to realize the light emission of the second light-emitting element 13 b. The first power source may be a PVEE voltage and the second power source may be a PVDD voltage.

With reference to fig. 1, optionally, the first power input module 10 includes M first power input units 101, the second power input module 11 includes N second power input units 111, the pixel circuit provided in the embodiment of the present invention further includes a scan signal input terminal 15, the scan signal input terminal 15 includes a first type scan signal input terminal 151 and a second type scan signal input terminal 152, the first type scan signal input terminal includes Q first scan signal input terminals 1511, the second type scan signal input terminal includes R second scan signal input terminals 1521, the first scan signal input terminal 1511 is configured to input a first scan signal, and the second scan signal input terminal 1521 is configured to output a second scan signal. Wherein M is more than or equal to 2 and is an integer, N is more than or equal to 2 and is an integer, Q is more than or equal to 2 and is an integer, R is more than or equal to 2 and is an integer, and M is equal to Q, N is equal to R, and M is more than or equal to N. The input terminal 23 of the first power input unit 101 is electrically connected to the first power supply terminal 153, the output terminal 21 of the first power input unit 101 is electrically connected to the first electrode 131 of the light emitting element 13, the control terminal 25 of the first power input unit 101 is electrically connected to the first scan signal input terminal 1511, and the enable phases of any two first scan signals do not overlap. The input end 24 of the second power input unit 111 is electrically connected to the second power supply end 154, the output end 22 of the second power input unit 111 is electrically connected to the second electrode 132 of the light emitting element 13, the control end 26 of the second power input unit 111 is electrically connected to a second scan signal input terminal 1521, the enable stages of any two second scan signals do not overlap, and the enable stage of the second scan signal corresponds to the enable stage of at least one first scan signal.

Specifically, as shown in fig. 1, the first power input module 10 includes M first power input units 101, an input end 23 of each first power input unit 101 is electrically connected to a first power supply end 153, and the first power supply end 153 is configured to provide a first power supply to the input end 23 of the first power input unit 101; the output terminal 21 of the first power input unit 101 is electrically connected to the first electrode 131 of the light emitting element 13, and the output terminal 21 of the first power input unit 101 is used for supplying a first power to the first electrode 131 of the light emitting element 13; the control terminal 25 of the first power input unit 101 is electrically connected to the first scan signal input terminal 1511, the first scan signal input terminal 1511 is used for providing a first scan signal to the control terminal 25 of the first power input unit 101 to control the first power input unit 101 to be enabled, and when the first power input unit 101 is in an enabled stage, the output terminal 21 of the first power input unit 101 outputs a first power to the first electrode 131 of the light emitting element 13.

The second power input module 11 includes N second power input units 111, an input end 24 of the second power input unit 111 is electrically connected to a second power supply end 154, and the second power supply end 154 is configured to provide a second power supply to the input end 24 of the second power input unit 111; the output terminal 22 of the second power input unit 111 is electrically connected to the second electrode 132 of the light emitting element 13, and the output terminal 22 of the second power input unit 111 is used for supplying a second power to the second electrode 132 of the light emitting element 13; the control end 26 of the second power input unit 111 is electrically connected to the second scan signal input terminal 1521, the second scan signal input terminal 1521 is used for providing a second scan signal to the control end 26 of the second power input unit 111 to control the second power input unit 111 to be enabled, and when the second power input unit 111 is in an enabled stage, the output end 22 of the second power input unit 111 outputs a second power to the second electrode 132 of the light emitting element 13.

The enabling stage of the second scan signal corresponds to the enabling stage of at least one first scan signal, so that the output terminal 21 of the first power input unit 101 outputs the first power to the first electrode 131 of the light emitting element 13, and the output terminal 22 of the second power input unit 111 outputs the second power to the second electrode 132 of the light emitting element 13, so that the first power input unit 101, the light emitting element 13, and the second power input unit 111 form a conducting loop, and a current can flow through the light emitting element 13, so that the light emitting element 13 can emit light to realize display.

In addition, by setting the enabling phases of any two first scanning signals not to overlap, the light-emitting elements 13 connected with different first power input units 101 emit light in a time-sharing manner, so that the time-sharing driving of one light-emitting control module 12 for a plurality of light-emitting elements 13 is realized, the number of light-emitting control modules 12 is reduced, and the cost and the power consumption are further reduced.

Similarly, the enabling stages of any two second scanning signals are not overlapped, so that the light-emitting elements 13 connected with different second power input units 111 emit light in a time-sharing manner, and further, the time-sharing driving of one light-emitting control module 12 on a plurality of light-emitting elements 13 is realized, the number of light-emitting control modules 12 is reduced, and the cost and the power consumption are further reduced.

It should be noted that, those skilled in the art can set the M, N, Q, R according to actual requirements, and only need to satisfy that M is greater than or equal to 2 and M is an integer, N is greater than or equal to 2 and N is an integer, Q is greater than or equal to 2 and Q is an integer, R is greater than or equal to 2 and R is an integer, and M is equal to Q, N is equal to R, and M is greater than or equal to N.

Fig. 3 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, as shown in fig. 3, optionally, the output end 21a of the first power input unit 101a and the output end 21b of the first second power input unit 101b are electrically connected to different light emitting elements 13, the output end 22a of the second power input unit 111a and the output end 21a of the first power input unit 101a are electrically connected to the same light emitting element 13, and the output end 22b of the second power input unit 111b and the output end 21b of the first second power input unit 101b are electrically connected to the same light emitting element 13.

Specifically, as shown in fig. 3, taking M ═ 2, N ═ 2, Q ═ 2, and R ═ 2 as an example, the first power input unit 101 includes a first power input unit 101a and a first second power input unit 101b, and the second power input unit 111 includes a second power input unit 111a and a second power input unit 111 b. The input terminal 23a of the first power input unit 101a and the input terminal 23b of the first second power input unit 101b are electrically connected to the first power supply terminal 153, the output terminal 21a of the first power input unit 101a is electrically connected to the first electrodes 131a of the plurality of first light emitting elements 13a, the output terminal 21b of the first second power input unit 101b is electrically connected to the first electrodes 131b of the plurality of second light emitting elements 13b, and the output terminal 21a of the first power input unit 101a and the output terminal 21b of the first second power input unit 101b are electrically connected to different light emitting elements 13. The input end 22a of the second dimethyl power input unit 111a and the input end 22b of the second power input unit 111b are electrically connected to the second power supply end 154, the output end 22a of the second dimethyl power input unit 111a is electrically connected to the second electrodes 132a of the plurality of first light emitting elements 13a after passing through the plurality of light emitting control modules 12, the output end 22b of the second power input unit 111b is electrically connected to the second electrodes 132b of the plurality of second light emitting elements 13b after passing through the plurality of light emitting control modules 12, and the output end 22b of the second power input unit 111b is electrically connected to the same light emitting element 13 as the output end 21b of the first second power input unit 101 b.

When the first power input unit 101a and the second power input unit 111a are in the enabled stage, the first power input unit 101a, the plurality of first light-emitting elements 13a, the light-emitting control module 12, and the second power input unit 111a form a conductive loop, and at this time, the plurality of light-emitting control modules 12 control the plurality of first light-emitting elements 13a to emit light by controlling the driving current of the corresponding plurality of first light-emitting elements 13 a. When the first second power input unit 101b and the second power input unit 111b are in the enabling stage, the first second power input unit 101b, the plurality of second light emitting elements 13b, the light emitting control module 12 and the second power input unit 111b form a conducting loop, and at this time, the plurality of light emitting control modules 12 control the plurality of second light emitting elements 13 to emit light by controlling the driving current of the corresponding plurality of second light emitting elements 13b, so as to implement the time-sharing control of different pixel regions.

Fig. 4 is a schematic diagram of a scan signal according to an embodiment of the present invention, as shown in fig. 3 and fig. 4, optionally, the first type of scan signal input terminal 151 includes a first scan signal input terminal 1511a and a first second scan signal input terminal 1511b, and the second type of scan signal input terminal 152 includes a second scan signal input terminal 1521a and a second scan signal input terminal 1521 b. The control terminal 25a of the first power input unit 101a is electrically connected to the first scanning signal input terminal 1511a, the control terminal 25b of the first second power input unit 101b is electrically connected to the first second scanning signal input terminal 1511b, the control terminal 26a of the second power input unit 111a is electrically connected to the second scanning signal input terminal 1521a, and the control terminal 26b of the second power input unit 111b is electrically connected to the second scanning signal input terminal 1521 b. The first a scanning signal input terminal 1511a and the second a scanning signal input terminal 1521a are electrically connected to the same scanning signal output terminal 41, and the first b scanning signal input terminal 1511b and the second b scanning signal input terminal 1521b are electrically connected to the same scanning signal output terminal 42.

As shown in fig. 3 and 4, the first SCAN signal input terminal 1511a is configured to output a first SCAN signal SCAN1a, the second SCAN signal input terminal 1521a is configured to output a second SCAN signal SCAN2a, the first SCAN signal input terminal 1511a and the second SCAN signal input terminal 1521a are electrically connected to the same SCAN signal output terminal 41, that is, the first SCAN signal SCAN1a and the second SCAN signal SCAN2a are the same, and the enable stages of the first SCAN signal SCAN1a and the second SCAN signal SCAN2a are overlapped. The first second SCAN signal input terminal 1511b is configured to output a first second SCAN signal SCAN1b, the second SCAN signal input terminal 1521b is configured to output a second SCAN signal SCAN2b, the first second SCAN signal input terminal 1511b and the second SCAN signal input terminal 1521b are electrically connected to the same SCAN signal output terminal 42, that is, the first second SCAN signal SCAN1b and the second SCAN signal SCAN2b are the same, and the enable stages of the first second SCAN signal SCAN1b and the second SCAN signal SCAN2b are overlapped.

With continued reference to fig. 3 and 4, illustratively, the plurality of light emitting elements 13 are arranged in an array, wherein the plurality of first light emitting elements 13a are arranged in a row direction and the plurality of second light emitting elements 13b are arranged in the row direction. When the first and second

power input units

101a and 111a are in the enabled stage when the first and second SCAN signals SCAN1a and SCAN2a are at the high level, the first power input unit 101a, the plurality of first light emitting elements 13a, the light emission control module 12, and the second power input unit 111a constitute a conductive loop, and at this time, the plurality of light emission control modules 12 control the plurality of first light emitting elements 13a to emit light by controlling the driving current of the corresponding plurality of first light emitting elements 13 a. When the first second SCAN signal SCAN1b and the second SCAN signal SCAN2b are at a high level, and the first second power input unit 101b and the second power input unit 111b are in an enable stage, the first second power input unit 101b, the plurality of second light-emitting elements 13b, the light-emission control module 12, and the second power input unit 111b form a conduction loop, and at this time, the plurality of light-emission control modules 12 control the plurality of second light-emitting elements 13 to emit light by controlling the driving currents of the corresponding plurality of second light-emitting elements 13b, thereby implementing time-sharing control of the first light-emitting element 13a row and the second light-emitting element 13b row. Compared with the prior art in which one pixel corresponds to one pixel driving circuit, the number of the light-emitting control modules 12 is reduced by at least half, the cost and the power consumption are further reduced, and the pixel circuit is simple in structure and easy to implement.

It should be noted that the arrangement of the first light emitting elements 13a and the second light emitting elements 13b can be set according to actual requirements, for example, as shown in fig. 3, a plurality of first light emitting elements 13a are arranged along a row direction, a plurality of second light emitting elements 13b are arranged along the row direction, and the rows of the first light emitting elements 13a and the second light emitting elements 13b are alternately arranged along a column direction, so as to realize the alternate control of the rows of the first light emitting elements 13a and the second light emitting elements 13 b. In other embodiments, a plurality of first light emitting elements 13a may be arranged in the column direction, and a plurality of second light emitting elements 13b may be arranged in the column direction, so as to implement time-sharing control of the first light emitting element 13a column and the second light emitting element 13b column, which is not limited in the embodiment of the present invention.

Fig. 5 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, as shown in fig. 5, optionally, the output end 21a of the first power input unit 101a is electrically connected to the first electrodes 131 of at least two odd-numbered light emitting elements 13 sequentially arranged along the first direction X, and the output end 21b of the first power input unit 101b is electrically connected to the first electrodes 131 of at least two even-numbered light emitting elements 13 sequentially arranged along the first direction X. The output terminal 22a of the second power input unit 111a is electrically connected to the second electrodes 132 of the at least two odd-numbered light emitting elements 13 sequentially arranged in the first direction X, and the output terminal 22b of the second power input unit 111b is electrically connected to the second electrodes 132 of the at least two even-numbered light emitting elements 13 sequentially arranged in the first direction X.

Illustratively, as shown in fig. 5, the plurality of light emitting elements 13 are arranged in an array, taking the first direction X as a column direction as an example, the plurality of first light emitting elements 13a are arranged along a row direction, the plurality of second light emitting elements 13b are arranged along the row direction, the rows of the first light emitting elements 13a and the rows of the second light emitting elements 13b are alternately arranged along the column direction, the first light emitting elements 13a are odd numbered light emitting elements 13 arranged along the first direction X, and the second light emitting elements 13b are even numbered light emitting elements 13 arranged along the first direction X. The output terminal 21a of the first power input unit 101a is electrically connected to the first electrodes 131a of the at least two first light emitting elements 13a, and the output terminal 21b of the first power input unit 101b is electrically connected to the first electrodes 131b of the at least two second light emitting elements 13 b. The output terminal 22a of the second power input unit 111a is electrically connected to the second electrodes 132a of the at least two first light emitting elements 13a, and the output terminal 22b of the second power input unit 111b is electrically connected to the second electrodes 132b of the at least two second light emitting elements 13b sequentially arranged in the first direction X.

With continued reference to fig. 4 and 5, the first SCAN signal input terminal 1511a is configured to output the first SCAN signal SCAN1a, the second SCAN signal input terminal 1521a is configured to output the second SCAN signal SCAN2a, the first second SCAN signal input terminal 1511b is configured to output the first second SCAN signal SCAN1b, and the second SCAN signal input terminal 1521b is configured to output the second SCAN signal SCAN2 b. When the first and second

power input units

101a and 111a are in the enabled stage when the first and second SCAN signals SCAN1a and SCAN2a are at the high level, the first power input unit 101a, the plurality of first light emitting elements 13a, the light emission control module 12, and the second power input unit 111a constitute a conductive loop, and at this time, the plurality of light emission control modules 12 control the plurality of first light emitting elements 13a to emit light by controlling the driving current of the corresponding plurality of first light emitting elements 13 a. When the first second SCAN signal SCAN1b and the second SCAN signal SCAN2b are at a high level, and the first second power input unit 101b and the second power input unit 111b are in an enable stage, the first second power input unit 101b, the plurality of second light-emitting elements 13b, the light-emitting control module 12, and the second power input unit 111b form a conducting loop, and at this time, the plurality of light-emitting control modules 12 control the plurality of second light-emitting elements 13 to emit light by controlling the driving currents of the corresponding plurality of second light-emitting elements 13b, thereby implementing time-sharing control of the area where the first light-emitting element 13a is located and the area where the second light-emitting element 13b is located. In the pixel circuit structure, one light-emitting control module 12 can control a plurality of light-emitting elements 13 to emit light, so that the number of the light-emitting control modules 12 is further reduced by half, and the cost and the power consumption are further reduced.

In other embodiments, the first direction X may also be a row direction or any other direction, and a person skilled in the art may set the first direction X according to actual requirements, which is not limited in the embodiments of the present invention.

Fig. 6 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, as shown in fig. 6, optionally, each second power input unit 111 corresponds to at least two first power input units 101, the output end 22 of the second power input unit 111 and the output ends 21 of the at least two first power input units 101 corresponding thereto are connected to the same light emitting element 13, and the enable phase of the second scan signal corresponds to the enable phase of the at least two first scan signals.

Illustratively, as shown in fig. 6, taking two first power input units 101 per second power input unit 111 as an example, the second power input units 111 include a second power input unit 111a and a second power input unit 111b, the first power input units 101 include a first power input unit 101a and a first second power input unit 101b, the first third power input unit 101c and the first third power input unit 101d, the second power input unit 111a corresponds to the first power input unit 101a and the first third power input unit 101c, the output end 22a of the second power input unit 111a and the output end 21a of the first power input unit 101a are both connected with the first light emitting element 13a, and the output end 22a of the second power input unit 111a and the output end 21c of the first third power input unit 101c are both connected with the third light emitting element 13 c. The second power input unit 111b corresponds to the first second power input unit 101b and the first third power input unit 101d, the output end 22b of the second power input unit 111b and the output end 21b of the first second power input unit 101b are both connected to the second light emitting element 13b, and the output end 22b of the second power input unit 111b and the output end 21d of the first third power input unit 101d are both connected to the fourth light emitting element 13 d.

With continued reference to fig. 6, the control terminal 25a of the first power input unit 101a is electrically connected to the first scan signal input terminal 1511a, and the first scan signal input terminal 1511a is used to provide the first scan signal to the control terminal 25a of the first power input unit 101a to control the first power input unit 101a to be enabled; the control terminal 25b of the first second power input unit 101b is electrically connected to the first second scanning signal input terminal 1511b, and the first second scanning signal input terminal 1511b is used for providing a first second scanning signal to the control terminal 25b of the first second power input unit 101b to control the enabling of the first second power input unit 101 b; the control terminal 25c of the first third power input unit 101c is electrically connected to the first third scanning signal input terminal 1511c, and the first third scanning signal input terminal 1511c is used for providing the first third scanning signal to the control terminal 25c of the first third power input unit 101c to control the enabling of the first third power input unit 101 c; the control end 25d of the first power input unit 101d is electrically connected to the first scanning signal input terminal 1511d, and the first scanning signal input terminal 1511d is used for providing the first scanning signal to the control end 25d of the first power input unit 101d to control the enabling of the first power input unit 101 d; the control terminal 26a of the second power input unit 111a is electrically connected to the second scanning signal input terminal 1521a, and the second scanning signal input terminal 1521a is used for providing a second scanning signal to the control terminal 26a of the second power input unit 111a to control the enabling of the second power input unit 111 a; the control terminal 26b of the second power input unit 111b is electrically connected to the second scanning signal input terminal 1521b, and the second scanning signal input terminal 1521b is used for providing a second scanning signal to the control terminal 26b of the second power input unit 111b to control the enabling of the second power input unit 111 b.

Wherein, the enabling stage of the second scanning signal is set to correspond to the enabling stage of the first scanning signal and the first third scanning signal respectively, so as to realize the light emission of the first light-emitting element 13a and the third light-emitting element 13 c; the enabling stages of the second scanning signal are respectively corresponding to the enabling stages of the first second scanning signal and the first third scanning signal, so that the second light-emitting element 13b and the fourth light-emitting element 13d emit light. Specifically, when the first scanning signal and the second scanning signal are both in the enabling stage, the first power input unit 101a, the first light emitting element 13a, the light emitting control module 12, and the second power input unit 111a form a conducting loop, and the light emitting control module 12 controls the first light emitting element 13a to emit light; when the first third scanning signal and the second scanning signal are both in the enabling stage, the first third power input unit 101c, the third light emitting element 13c, the light emitting control module 12 and the second power input unit 111a form a conducting loop, and the light emitting control module 12 controls the third light emitting element 13c to emit light; when the first second scanning signal and the second scanning signal are both in the enabling stage, the first second power input unit 101b, the second light emitting element 13b, the light emitting control module 12 and the second power input unit 111b form a conducting loop, and the light emitting control module 12 controls the second light emitting element 13b to emit light; when the first scanning signal and the second scanning signal are both in the enabling stage, the first power input unit 101d, the fourth light emitting element 13d, the light emitting control module 12 and the second power input unit 111b form a conducting loop, and the light emitting control module 12 controls the fourth light emitting element 13d to emit light.

Further, as shown in fig. 6, the enabling stages of the first scanning signal, the first second scanning signal, the first third scanning signal and the first third scanning signal are all not overlapped, so that one light-emitting control module 12 can control the first light-emitting element 13a, the second light-emitting element 13b, the third light-emitting element 13c and the fourth light-emitting element 13d in a time-sharing manner to perform display, the number of light-emitting control modules 12 is further reduced, and the cost and the power consumption are reduced.

It should be noted that, in the above embodiment, only two first power input units 101 are used for each second power input unit 111, in other embodiments, more first power input units 101 may be used for each second power input unit 111, and those skilled in the art can set the configuration according to actual requirements, which is not limited in the embodiment of the present invention.

With continued reference to fig. 3 and 4, optionally, the enable phases of the first scan signals input by two adjacent first scan signal input terminals 1511 are staggered by a preset time t.

For example, as shown in fig. 3 and 4, taking the first electrode 131 as an anode and the second electrode 132 as a cathode, the first SCAN signal input terminal 1511a is used for outputting the first SCAN signal SCAN1a, the second first SCAN signal input terminal 1521a is used for outputting the second SCAN signal SCAN2a, the first second SCAN signal input terminal 1511b is used for outputting the first second SCAN signal SCAN1b, and the second SCAN signal input terminal 1521b is used for outputting the second SCAN signal SCAN2 b. The first SCAN signal input terminal 1511a and the first second SCAN signal input terminal 1511b are adjacent to each other, and the first SCAN signal SCAN1a and the first second SCAN signal SCAN1b are first SCAN signals input to the adjacent two first SCAN signal input terminals 1511.

With reference to fig. 3 and 4, when the first SCAN signal SCAN1a and the second SCAN signal SCAN2a are at a high level, the first power input unit 101a and the second power input unit 111a are in an enabling phase, and the first power input unit 101a, the first light emitting element 13a, the light emitting control module 12 and the second power input unit 111a form a conducting loop, and at this time, the first power output by the output end 21a of the first power input unit 101a sequentially passes through the first electrode 131a (anode) of the first light emitting element 13a, the second electrode 132a (cathode) of the first light emitting element 13a, the first end 121 of the light emitting control module 12, the second end 122 of the light emitting control module 12 and the second power input unit 111a, so as to realize the light emission of the first light emitting element 13 a. When the first second SCAN signal SCAN1b and the second SCAN signal SCAN2b are at a high level, the first second power input unit 101b and the second power input unit 111b are in an enabling stage, and the first second power input unit 101b, the second light emitting device 13b, the light-emitting control module 12 and the second power input unit 111b sequentially form a conducting loop, and at this time, the first power output by the output terminal 21b of the first second power input unit 101b sequentially passes through the first electrode 131b (anode) of the second light emitting device 13b, the second electrode 132b (cathode) of the second light emitting device 13b, the second terminal 122 of the light-emitting control module 12, the first terminal 121 of the light-emitting control module 12 and the second power input unit 111b, so as to realize the light emission of the second light emitting device 13 b.

As can be seen from the above process, when the light emission of the first light emitting element 13a is changed to the light emission of the second light emitting element 13b, the current direction is reversed, and therefore, by setting the enabling phases of the first scan signals input by the two adjacent first scan signal input terminals 1511 to be staggered by the preset time t and setting t > 0, an interval exists between the period when the first light emitting element 13a emits light and the period when the second light emitting element 13b emits light, a sufficient time is left for the current reversal, and the current flow when the first light emitting element 13a emits light is prevented from affecting the light emission of the second light emitting element 13 b.

Fig. 7 is a schematic structural diagram of another pixel circuit according to an embodiment of the present invention, as shown in fig. 7, optionally, the first power input unit 101 includes a first switch unit 1011, a second switch unit 1012 and at least one resistor 1013, an input end 51 of the first switch unit 1011 serves as an input end 23 of the first power input unit 101, an output end 52 of the first switch unit 1011 serves as an output end 21 of the first power input unit 101, a first end 53 of the resistor 1013 is electrically connected to the input end 51 of the first switch unit 1011, a second end 54 of the resistor 1013 is electrically connected to a control end 55 of the first switch unit 1011 and an input end 56 of the second switch unit 1012, an output end 57 of the second switch unit 1012 is grounded, and a control end 58 of the second switch unit 1012 serves as a control end 25 of the first power input unit 101.

Illustratively, as shown in fig. 7, the first power input unit 101 includes a first power input unit 101a and a first second power input unit 101b, the first power input unit 101a includes a first switch unit 1011a, a second switch unit 1012a and at least one first resistor 1013a, an input terminal 51a of the first switch unit 1011a is used as an input terminal 23a of the first power input unit 101a, an output terminal 52a of the first switch unit 1011a is used as an output terminal 21a of the first power input unit 101a, a first terminal 53 of the first resistor 1013a is electrically connected to the input terminal 51a of the first switch unit 1011a, a second terminal 54a of the first resistor 1013a is electrically connected to a control terminal 55a of the first switch unit 1011a and an input terminal 56a of the second switch unit 1012a, an output terminal 57a of the second switch unit 1012a is grounded, and a control terminal 58a of the second switch unit 1012a is used as a control terminal 25 of the first power input unit 101a a. The control end 58a of the second switch unit 1012a is electrically connected to the first scanning signal input terminal 1511a as the control end 25a of the first power input unit 101a, the first scanning signal input terminal 1511a is used for outputting the first scanning signal, during the enabling stage of the first scanning signal, the second switch unit 1012a is turned on, the potential at the control end 55a of the first switch unit 1011a is lowered, so that the first switch unit 1011a is turned on, and the first power supply end 153 outputs the first power supply to the first light emitting element 13 a.

Continuing with fig. 7, similarly, the first second power input unit 101b includes a first second switch unit 1011b, a second switch unit 1012b and at least one second resistor 1013b, wherein the input end 51b of the first second switch unit 1011b is used as the input end 23b of the first second power input unit 101b, the output end 52b of the first second switch unit 1011b is used as the output end 21b of the first second power input unit 101b, the first end 53b of the second resistor 1013b is electrically connected with the input end 51b of the first second switch unit 1011b, the second end 54b of the second resistor 1013b is electrically connected with the control end 55b of the first second switch unit 1011b and the input end 56b of the second switch unit 1012b, the output end 57b of the second switch unit 1012b is grounded, and the control end 58b of the second switch unit 1012b is used as the control end 25b of the first second power input unit 101 b. The control end 58b of the second switch unit 1012b is electrically connected to the first second scanning signal input terminal 1511b as the control end 25b of the first second power input unit 101b, the first second scanning signal input terminal 1511b is used for outputting the first second scanning signal, during the enabling stage of the first second scanning signal, the second switch unit 1012b is turned on, the potential at the control end 55b of the first second switch unit 1011b is reduced, so that the first second switch unit 1011b is turned on, and the first power supply end 153 outputs the first power supply to the second light emitting element 13 b.

The resistor 1013 ensures that a voltage difference exists between the input terminal 51a and the control terminal 55a of the first switching unit 1011, thereby ensuring that the first switching unit 1011 is turned on.

In the pixel circuit provided in the embodiment of the present invention, the first power input unit 101 includes the first switch unit 1011, the second switch unit 1012 and the at least one resistor 1013, and the first switch unit 1011 is configured to implement the function of the control terminal 25 of the first power input unit 101, and the second switch unit 1012 is configured to implement the functions of the input terminal 23 and the output terminal 21 of the first power input unit 101, so that the functions of the control terminal 25 and the functions of the input terminal 23 and the output terminal 21 are implemented by two switch units, thereby solving the problem that a single switch device in the prior art cannot stably output current, and implementing stable output of current.

With continued reference to fig. 7, optionally, the first switching unit 1011 includes a P-type switching unit and the second switching unit 1012 includes an N-type switching unit.

Specifically, as shown in fig. 7, the second switch unit 1012 includes an N-type switch unit, and when the first scanning signal is at a high level, the second switch unit 1012 is turned on, the potential at the control terminal 55 of the first switch unit 1011 is lowered, and the resistor 1013 causes a voltage difference between the input terminal 51 and the control terminal 55 of the first switch unit 1011, so that the first switch unit 1011 is turned on, thereby enabling the first power supply terminal 153 to output the first power supply to the first light emitting element 13.

With continued reference to fig. 7, optionally, the first power input unit 101 further includes a voltage dividing resistor 1014, and the voltage dividing resistor 1014 is connected in series between the control terminal 55 of the first switch unit 1011 and the input terminal 56 of the second switch unit 1012.

Illustratively, as shown in fig. 7, the first power input unit 101 includes a first power input unit 101a and a first second power input unit 101b, the first power input unit 101a includes a first voltage dividing resistor 1014a, and the first voltage dividing resistor 1014a is connected in series between the control terminal 55a of the first switch unit 1011a and the input terminal 56a of the second switch unit 1012 a. In the enabling phase of the first scanning signal, the second switch unit 1012a is turned on, the first resistor 1013a and the first voltage dividing resistor 1014a divide the voltage, and the potential at the control terminal 55a of the first switch unit 1011a is lowered, so that the first switch unit 1011a is turned on, thereby realizing that the first power supply terminal 153 outputs the first power supply to the first light emitting element 13 a.

Similarly, the first second power input unit 101b includes a second voltage dividing resistor 1014b, and the second voltage dividing resistor 1014b is connected in series between the control terminal 55b of the first second switch unit 1011b and the input terminal 56b of the second switch unit 1012 b. In the enabling phase of the first second scanning signal, the second switch unit 1012b is turned on, the second resistor 1013b and the second voltage dividing resistor 1014b divide the voltage, and the potential at the control terminal 55b of the first second switch unit 1011b is lowered, so that the first second switch unit 1011b is turned on, thereby realizing that the first power supply terminal 153 outputs the first power supply to the second light emitting element 13 b.

The resistance values of the resistor 1013 and the voltage dividing resistor 1014 can be set according to actual requirements, for example, the resistance values of the resistor 1013 and the voltage dividing resistor 1014 are both 10k Ω, which is not limited in the embodiment of the present invention.

Fig. 8 is a schematic diagram of a light-emitting control signal according to an embodiment of the present invention, as shown in fig. 8, optionally, the light-emitting control signal 33 includes a first pulse width modulation signal 331 or a first voltage signal, and the first pulse width modulation signal 331 is used to adjust an on-time of the light-emitting control module 12 to control a light-emitting brightness of the light-emitting element 13. The first voltage signal is used to adjust a voltage difference between the control terminal 123 of the light emitting control module 12 and the first terminal 121 or the second terminal 122, and adjust a driving current flowing through the light emitting device 13, so as to control the light emitting brightness of the light emitting device 13.

Specifically, as shown in fig. 3 and 8, taking the example that the light emission control signal 33 includes the first pulse width modulation signal 331 as an example, the first SCAN signal SCAN1a is identical to the second SCAN signal SCAN2a (not shown), and the first second SCAN signal SCAN1b is identical to the second SCAN signal SCAN2b (not shown).

With continued reference to fig. 3 and 8, when the first SCAN signal SCAN1a is at a high level, the first and second

power input units

101a and 111a are in an enable phase, the light-emission control module 12 controls the first light-emitting element 13a to emit light; when the first second SCAN signal SCAN1b is at a high level, the first second power input unit 101b and the second power input unit 111b are in an enable stage, and the light emission control module 12 controls the second light emitting element 13b to emit light.

When the light-emitting control module 12 controls the light-emitting element 13 to emit light, the control terminal 123 of the light-emitting control module 12 receives the first pulse width modulation signal 331, and the first pulse width modulation signal 331 controls the conduction time between the first terminal 121 and the second terminal 122 of the light-emitting control module 12 by modulating the pulse width (duty ratio), so as to control the light-emitting luminance of the light-emitting element 13.

For example, as shown in fig. 8, the first pwm signal 331 may control the conduction time period between the first end 121 and the second end 122 of the light emission control module 12 by modulating the number of pulses per unit time (see 331a in fig. 8), wherein the larger the number of pulses per unit time, the longer the conduction time period between the first end 121 and the second end 122 of the light emission control module 12 per unit time, and the longer the light emission time of the light emitting element 13 per unit time, the larger the light emission brightness of the light emitting element 13.

Continuing with fig. 8, for example, the first pulse width modulation signal 331 can also control the conduction time between the first end 121 and the second end 122 of the light-emitting control module 12 by modulating the width of a single pulse (see 331b in fig. 8), wherein the wider the width of the single pulse, the longer the conduction time between the first end 121 and the second end 122 of the light-emitting control module 12, the longer the light-emitting time of the light-emitting element 13, and the larger the light-emitting brightness of the light-emitting element 13.

The first pwm signal 331 is used to adjust the on-time of the light-emitting control module 12 to control the light-emitting brightness of the light-emitting element 13, so as to improve the control accuracy of the light-emitting brightness of the light-emitting element 13.

In other embodiments, the light-emitting control signal 33 may further include a first voltage signal, and the voltage difference between the first end 121 and the second end 122 of the light-emitting control module 12 is controlled by modulating the voltage of the first voltage signal, so as to control the turn-on degree of the light-emitting control module 12, and adjust the magnitude of the driving current flowing through the light-emitting element 13, so as to control the light-emitting brightness of the light-emitting element 13. The larger the voltage difference between the first end 121 and the second end 122 of the light-emitting control module 12 is, the larger the opening degree of the light-emitting control module 12 is, the larger the driving current flowing through the light-emitting element 13 is, and the larger the light-emitting brightness of the light-emitting element 13 is.

With continued reference to fig. 7, optionally, the first switching unit 1011, the second switching unit 1012, the second power input module 11, and the light emission control module 12 all include field effect transistors or thin film transistors.

Specifically, the channel material of the Field-Effect Transistor (FET) is usually polysilicon, so that the on-resistance is small, and the Field-Effect Transistor (FET) is used by providing the first switch unit 1011, the second switch unit 1012, the second power input module 11, and the light-emitting control module 12, thereby contributing to further reduction of power consumption. The Field-Effect Transistor (FET) may be a Junction Field-Effect Transistor (JFET) or a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET), and may be set by a person skilled in the art according to actual requirements.

In addition, compared with a Thin Film Transistor (TFT), a Field-Effect Transistor (FET) is less affected by process fluctuation and has better uniformity, so when the first switching unit 1011, the second switching unit 1012, the second power input module 11, and the light emission control module 12 all use a Field-Effect Transistor (FET), a complex threshold compensation circuit or an external compensation circuit does not need to be provided, and the structure is simple and easy to implement. In addition, in the pixel circuit provided in the embodiment of the present invention, the plurality of light emitting elements 13 are arranged to emit light and share one light emitting control module 12, so that the number of light emitting control modules 12, that is, the number of Field-Effect transistors (FETs) is reduced, which is beneficial to reducing the cost and the power consumption, and the cost of the pixel circuit is not too high. In other embodiments, the first switch unit 1011, the second switch unit 1012, the second power input module 11, and the light emission control module 12 may also adopt Thin Film Transistors (TFTs) to further reduce the production cost, which is not limited in the embodiment of the present invention.

Alternatively, the light emitting element 13 includes an organic light emitting diode, a light emitting diode, or a micro light emitting diode.

Specifically, the Light Emitting element 13 may be an Organic Light Emitting Diode (OLED), a Light Emitting Diode (LED), or a Micro Light Emitting Diode (Mic-LED), but is not limited thereto, and the Light Emitting Diode as the current type Light Emitting device has many advantages of active Light emission, fast response speed, wide viewing angle, rich color, high brightness, low power consumption, and the like.

Micro-LEDs and Mini-LEDs can be adopted as Micro Light-Emitting diodes (Mic-LEDs), wherein the Micro-LEDs refer to LED chips with the grain size of less than 100 micrometers, a display screen with pixel particles of 0.05 mm or smaller can be realized, the power consumption of the Micro-LEDs is very low, and the Micro Light-Emitting diodes have good material stability and no image residues. The Mini-LED is an LED chip with the grain size of between 100 and 1000 microns, when the Mini-LED is adopted, the yield is high, the special-shaped cutting characteristic is achieved, and the backlight form with a high curved surface can be formed by matching the Mini-LED with the flexible substrate, so that the color rendering property is better.

Alternatively, the light emitting element 13 may be a single LED chip, or may be a plurality of LED chips connected in series or in parallel, and those skilled in the art can set the LED chips according to actual requirements.

With reference to fig. 1, optionally, the pixel circuit according to the embodiment of the present invention further includes a first current limiting resistor 16 and a second current limiting resistor 17, where the first current limiting resistor 16 is serially connected between the second electrode 132 of the light emitting element 13 and the first end 121 of the light emitting control module 12, and the second current limiting resistor 17 is serially connected between the second electrode 132 of the light emitting element 13 and the second end 122 of the light emitting control module 12. The first current limiting resistor 16 and the second current limiting resistor 17 serve as protective devices when the input of the external power supply fluctuates, and therefore the service life of the pixel circuit is prolonged.

According to the pixel circuit provided by the embodiment of the invention, the light-emitting control module 12 is arranged to control the light-emitting elements 13 to emit light in a time-sharing manner, so that the brightness control in different areas is realized, the number of the light-emitting control modules 12 is reduced, and the cost and the power consumption are further reduced. In addition, the on-time of the light emitting control module 12 is adjusted by the first pulse width modulation signal 331 to control the light emitting brightness of the light emitting element 13, thereby improving the control accuracy of the light emitting brightness of the light emitting element 13. And by arranging that the first power input unit 101 includes the first switch unit 1011, the second switch unit 1012 and the at least one resistor 1013, the function of the control terminal 25 and the functions of the input terminal 23 and the output terminal 21 of the first power input unit 101 are realized by two switch units, so that the problem that a single switch device in the prior art cannot stably output current is solved, and stable output of current is realized.

Based on the same inventive concept, an embodiment of the present invention further provides a light emitting panel, and fig. 9 is a schematic structural diagram of the light emitting panel provided in the embodiment of the present invention, as shown in fig. 9, the light emitting panel includes a light emitting region 60 and a non-light emitting region 61 surrounding the light emitting region 60, and a pixel circuit provided in any of the above embodiments is disposed in the light emitting region 60, so that the light emitting panel provided in the embodiment of the present invention has the technical effects of the technical solutions in any of the above embodiments, and the explanations of the structures and terms identical to or corresponding to the above embodiments are not repeated herein.

With continued reference to fig. 9, the light emitting region 60 is further provided with scan lines 62 and light emission control signal lines 63, the scan lines 62 and the light emission control signal lines 63 are distributed crosswise to define a plurality of sub-light emitting regions 64, and one pixel circuit 65 is provided in each sub-light emitting region 64. A scanning drive circuit 66 and a light emission control circuit 67 are provided in the non-light emitting region 61, the scanning lines 62 are electrically connected to the scanning drive circuit 66 and the pixel circuits 66, respectively, and the light emission control signal lines 63 are electrically connected to the light emission control circuit 67 and the pixel circuits 66, respectively.

The scanning driving circuit 66 supplies the pixel circuit 66 with a first scanning signal and a second scanning signal through the scanning line 62, and the light-emission control circuit 67 supplies the pixel circuit 66 with the light-emission control signal 33 through the light-emission control signal line 63, so that the pixel circuit 66 is supported to drive the light-emitting element to emit light to realize a display function.

Optionally, the light-emitting panel provided by the embodiment of the invention comprises a display panel or a backlight module.

The light-emitting panel can comprise a display panel, so that the display is directly performed, and the power consumption and the cost are low. The light-emitting panel can also be used as a backlight module, and brightness control is carried out by partitioning the pixel circuit, so that bright-state pictures can have higher brightness, and dark-state pictures can approach zero brightness, and the display effect is favorably improved.

Based on the same inventive concept, an embodiment of the present invention further provides a display device, fig. 10 is a schematic structural diagram of the display device provided in the embodiment of the present invention, and as shown in fig. 10, the display device 90 includes a display panel 91 according to any embodiment of the present invention, so that the display device 90 provided in the embodiment of the present invention has the technical effects of the technical solutions in any embodiment, and explanations of structures and terms that are the same as or corresponding to the embodiments are not repeated herein. The display device 90 provided in the embodiment of the present invention may be a mobile phone shown in fig. 10, and may also be any electronic product with a display function, including but not limited to the following categories: the touch screen display system comprises a television, a notebook computer, a desktop display, a tablet computer, a digital camera, an intelligent bracelet, intelligent glasses, a vehicle-mounted display, medical equipment, industrial control equipment, a touch interaction terminal and the like, and the embodiment of the invention is not particularly limited in this respect.

It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A pixel circuit is characterized by comprising a first power input module, a second power input module and a light-emitting control module;

2. The pixel circuit according to claim 1,

a first electrode of the first light-emitting element is electrically connected with an output end of the first power input unit, and a second electrode of the first light-emitting element, an output end of the second power input unit and a first end of the light-emitting control module are connected to a first node;

a first electrode of the second light-emitting element is electrically connected with an output end of the first power input unit, and a second electrode of the second light-emitting element, an output end of the second power input unit and a second end of the light-emitting control module are connected to a second node;

the control end of the light-emitting control module is connected with a light-emitting control signal, and the light-emitting control module is used for providing driving current for the light-emitting element.

3. The pixel circuit according to claim 2, wherein the first electrode is an anode and the second electrode is a cathode;

or, the first electrode is a cathode and the second electrode is an anode.

4. The pixel circuit according to any of claims 1-3, wherein the first power input module comprises M first power input units;

the second power input module comprises N second power input units;

the pixel circuit further includes scan signal input terminals including first-class scan signal input terminals including Q first-scan signal input terminals and second-class scan signal input terminals including R second-scan signal input terminals; the first scanning signal input terminal is used for inputting a first scanning signal, and the second scanning signal input terminal is used for outputting a second scanning signal;

wherein M is more than or equal to 2 and is an integer, N is more than or equal to 2 and N is an integer, Q is more than or equal to 2 and Q is an integer, R is more than or equal to 2 and R is an integer, and M is Q, N is R, M is more than or equal to N;

the input end of the first power input unit is electrically connected with a first power supply end, the output end of the first power input unit is electrically connected with a first electrode of the light-emitting element, the control end of the first power input unit is electrically connected with the first scanning signal input terminal, and the enabling stages of any two first scanning signals are not overlapped;

the input end of the second power input unit is electrically connected with a second power supply end, and the output end of the second power input unit is electrically connected with the second electrode of the light-emitting element; the control end of the second power input unit is electrically connected with the second scanning signal input terminal, the enabling stages of any two second scanning signals are not overlapped, and the enabling stage of the second scanning signal corresponds to the enabling stage of at least one first scanning signal.

5. The pixel circuit according to claim 4, wherein the first power input unit A is electrically connected to a different light emitting element from the output terminal of the first power input unit B;

the output end of the second power input unit is electrically connected with the output end of the first power input unit, and the output end of the second power input unit is electrically connected with the output end of the first power input unit.

6. The pixel circuit of claim 5,

the first scanning signal input terminal comprises a first scanning signal input terminal A and a first scanning signal input terminal B, and the second scanning signal input terminal comprises a second scanning signal input terminal and a second scanning signal input terminal B;

the control end of the first A power input unit is electrically connected with the first A scanning signal input terminal, and the control end of the first B power input unit is electrically connected with the first B scanning signal input terminal; the control end of the second power supply input unit is electrically connected with the second scanning signal input terminal, and the control end of the second power supply input unit is electrically connected with the second scanning signal input terminal;

the first scanning signal input terminal and the second scanning signal input terminal are electrically connected with the same scanning signal output end, and the first scanning signal input terminal and the second scanning signal input terminal are electrically connected with the same scanning signal output end.

7. The pixel circuit according to claim 5, wherein an output terminal of the first power input unit is electrically connected to first electrodes of at least two odd-numbered light emitting elements arranged in sequence in a first direction, and an output terminal of the first power input unit is electrically connected to first electrodes of at least two even-numbered light emitting elements arranged in sequence in the first direction;

the output end of the second power input unit is electrically connected with the second electrodes of at least two odd-numbered light-emitting elements which are sequentially arranged along the first direction, and the output end of the second power input unit is electrically connected with the second electrodes of at least two even-numbered light-emitting elements which are sequentially arranged along the first direction.

8. The pixel circuit according to claim 4, wherein each of the second power input units corresponds to at least two of the first power input units; the output end of the second power input unit and the output ends of at least two corresponding first power input units are connected with the same light-emitting element;

the enabling phase of the second scanning signal corresponds to the enabling phase of at least two first scanning signals.

9. The pixel circuit according to claim 4, wherein enable phases of the first scan signals input to adjacent two of the first scan signal input terminals are staggered by a predetermined time.

10. The pixel circuit according to claim 4, wherein the first power supply input unit includes a first switching unit, a second switching unit, and at least one resistor;

the input end of the first switch unit is used as the input end of the first power input unit, the output end of the first switch unit is used as the output end of the first power input unit, the first end of the resistor is electrically connected with the input end of the first switch unit, the second end of the resistor is respectively electrically connected with the control end of the first switch unit and the input end of the second switch unit, the output end of the second switch unit is grounded, and the control end of the second switch unit is used as the control end of the first power input unit.

11. The pixel circuit according to claim 10, wherein the first switching unit comprises a P-type switching unit, and the second switching unit comprises an N-type switching unit.

12. The pixel circuit according to claim 2, wherein the light emission control signal includes a first pulse width modulation signal or a first voltage signal;

the first pulse width modulation signal is used for adjusting the conduction time of the light-emitting control module so as to control the light-emitting brightness of the light-emitting element;

the first voltage signal is used for adjusting a voltage difference between a control end of the light-emitting control module and the first end or the second end, and adjusting a driving current flowing through the light-emitting element so as to control the light-emitting brightness of the light-emitting element.

13. The pixel circuit according to claim 10, wherein the first switching unit, the second power input module, and the light emission control module each include a field effect transistor or a thin film transistor.

14. The pixel circuit according to claim 1, wherein the light emitting element comprises an organic light emitting diode, a light emitting diode, or a micro light emitting diode.

15. A light-emitting panel characterized by comprising a light-emitting region in which the pixel circuit according to any one of claims 1 to 14 is provided, and a non-light-emitting region surrounding the light-emitting region;

16. A display device characterized by comprising the light-emitting panel according to claim 15.