CN114334898A

CN114334898A - Display module and display panel

Info

Publication number: CN114334898A
Application number: CN202111591780.8A
Authority: CN
Inventors: 李漫铁; 龙亦雄; 龚高平
Original assignee: Ledman Optoelectronic Co Ltd
Current assignee: Ledman Optoelectronic Co Ltd
Priority date: 2021-12-23
Filing date: 2021-12-23
Publication date: 2022-04-12

Abstract

The invention discloses a display module and a display panel. The display module comprises a row driving unit, a column driving unit, a first connecting line and pixel units arranged in an array; the pixel unit comprises at least two light-emitting devices with different light-emitting colors and a common end, and a first electrode of each light-emitting device is connected with the common end; an output of line drive unit is connected with the common terminal electricity of a row of pixel, an output of row drive unit is connected with the second electrode electricity of the luminescent device of same luminous colour in the pixel of a line, the common terminal of same row of pixel is connected through first connecting wire, first connecting wire and common terminal are with layer setting, the circuit design of circuit connection in the display module has been simplified, reduce the required sheet layer setting of display module simultaneously, be favorable to reducing the number of layers setting of base plate, thereby be favorable to simplifying the structural design of display module, reduce the cost of display module.

Description

Display module and display panel

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display module and a display panel.

Background

The Light Emitting Diode (LED) display screen comprises a plurality of unit modules, and each unit module comprises a plurality of row driving chips, a plurality of column driving chips and a plurality of LED lamp beads. Thousands of LED lamp beads respectively emit light with specified colors, so that the LED display screen can display one frame of picture. When the unit module sends out light with a specified color, the LED display screen can drive the LED lamp beads to emit light in a dynamic scanning mode. Illustratively, the LED display screen can adopt an 8-scan dynamic scanning mode to drive the LED lamp beads to emit light, namely, each row driving chip is connected with one row of LED lamp beads, each column driving chip is connected with 8 LED lamp beads in one column, one row is controlled by the row driving chips, and one column of LED lamp beads is controlled by the column driving chips, so that each LED lamp bead is driven to emit light.

In the prior art, a row driving chip, a column driving chip and a plurality of LED lamp beads are arranged on a substrate and used for forming a unit module, the substrate is provided with a plurality of layers of circuit boards, and each layer of circuit board is used for forming different connecting wires so as to realize the connection of the row driving chip and the column driving chip with the plurality of LED lamp beads. For example, in the prior art, the circuit connection in the unit module may adopt six layers of second-order circuit boards to implement the connection between the row driver chip and the plurality of LED lamp beads, so that the number of substrate board layers required by the unit module is too many, thereby resulting in the complicated circuit connection and the complicated structure of the display module.

Disclosure of Invention

The invention provides a display module and a display panel, which are used for reducing the requirement on the number of substrate plate layers of the display module, simplifying the circuit connection complexity of the display module and reducing the cost of the display module.

In a first aspect, an embodiment of the present invention provides a display module, including a row driving unit, a column driving unit, a first connecting line, and pixel units arranged in an array;

the pixel unit comprises at least two light-emitting devices with different light-emitting colors and a common end, and a first electrode of each light-emitting device is connected with the common end;

one output end of the row driving unit is electrically connected with the common end of one row of the pixel units, and one output end of the column driving unit is electrically connected with the second electrode of the light-emitting device with the same light-emitting color in one row of the pixel units; and the public ends of the pixel units in the same row are electrically connected through the first connecting line, and the first connecting line and the public ends are arranged in the same layer.

Optionally, the number of rows of the pixel units is greater than the number of columns of the pixel units.

Optionally, the common ends of the pixel units in the same column and the first connecting lines correspondingly connected are distributed in a straight line.

Optionally, the display module further includes a second connection line, and the second electrodes of the light emitting devices of the same light emitting color in the pixel unit in one row are connected through the second connection line; the second connecting line and the pixel units are arranged in different layers.

Optionally, the display module further includes a first substrate and a second substrate stacked on each other;

the first substrate comprises a first surface and a second surface which are oppositely arranged, the second substrate comprises a third surface and a fourth surface which are oppositely arranged, the first surface is arranged on one side of the second surface far away from the third surface, and the fourth surface is arranged on one side of the third surface far away from the second surface;

the row driving unit and the column driving unit are arranged on the first surface, the second surface further comprises signal connecting lines, the second connecting lines are arranged on the third surface, and the pixel units are arranged on the fourth surface; the row driving unit and the column driving unit are connected with the signal connecting line, and the signal connecting line is used for providing driving signals for the row driving unit and the column driving unit; the row driving unit provides a first driving signal for the first electrodes of a row of the light emitting devices through the common terminal, and the column driving unit provides a second driving signal for the second electrodes of a row of the light emitting devices through the second connection line.

Optionally, the pixel unit includes three light emitting devices with different emission colors, the column driving unit includes three column driving sub-units, and one output end of each column driving sub-unit is electrically connected to the second electrode of the light emitting device with the same emission color in one row of the pixel units.

Optionally, the display module includes at least one column driving unit, the at least one column driving unit includes a plurality of output terminals, and each output terminal of the column driving unit is electrically connected to the second electrode of the light emitting device of the same light emitting color in the pixel unit of one row.

Optionally, the row driving unit includes a plurality of output ends, and the number of columns of the pixel units and the number of output ends of the row driving unit are in a multiple relationship.

Optionally, the row driving unit includes at least two row driving sub-units, and the same output terminal of each row driving sub-unit is connected to the common terminal of the pixel units in the same column.

In a second aspect, an embodiment of the present invention further provides a display panel, including the display module provided in the first aspect.

According to the technical scheme of the embodiment of the invention, the public ends of the same row of pixel units are connected through the first connecting line, and the first connecting line and the public ends are arranged on the same layer, so that the first connecting line and the public ends can be prevented from being punched and changed in layers and connected, the reliability of the first connecting line can be ensured, and a layer plate additionally arranged for forming the first connecting line can be avoided, the circuit design of circuit connection in the display module is simplified, the layer plate arrangement required by the display module is reduced, the layer arrangement of the substrate is favorably reduced, the structural design of the display module is favorably simplified, and the cost of the display module is reduced.

Drawings

Fig. 1 is a schematic partial structural diagram of a display module according to an embodiment of the present invention;

fig. 2 is a schematic view of a partial front view structure of a display module according to an embodiment of the present invention;

fig. 3 is a schematic partial structure diagram of another display module 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.

In the prior art, an LED display screen is generally a 16:9 display screen, and the sizes of unit modules forming the display screens with different resolutions are different. Illustratively, when the LED display screen is a 2K standard display screen of 16:9, the length and height of the unit modules constituting the LED display screen may be 60.8 × 170.1 mm. When the distance between the pixels is set to be equal to about 1.26mm, the length of the unit module can be 48 pixels and the height can be 135 pixels. The cell module has 48 rows by 135 rows of pixels. When the unit module drives the pixel points to emit light in a dynamic scanning mode, 135 rows of pixels can be divided into three groups, and each group has 45 rows of pixels. And connecting the pixels in the same column in the 45 rows of pixels with a column of driving chips to form a 45-scan dynamic scanning mode. Each pixel may include a plurality of LED beads having different emission colors, and when each pixel includes a red LED bead, a green LED bead, and a blue LED bead, and each column driver chip may include 16 channels, then 48 columns of pixels in each group require 3 × 3 column driver chips in total, and 48 columns of pixels in three groups require 3 × 3 column driver chips in total. When the row driver chips are 8 channels, the 45 rows of pixels in each group require 6 row driver chips, and the 45 rows of pixels in three groups require 18 row driver chips. When the unit module is formed, the row driving chips, the column driving chips and the pixels are arranged on the substrate, the substrate comprises a multilayer circuit board, and each channel of the row driving chips is connected with one row of pixels, and the pixels in the same column in the 45 rows of pixels are connected with one column of driving chips. In the prior art, the circuit connection in the unit module can adopt six layers of second-order circuit boards to realize the connection of the row driving chip and the row driving chip with a plurality of LED lamp beads, so that the substrate board layer required by the unit module is too many, and the circuit connection of the display module is complex and the structure is complex.

In view of the above technical problems, an embodiment of the present invention provides a display module. Fig. 1 is a schematic partial structural diagram of a display module according to an embodiment of the present invention. As shown in fig. 1, the display module includes a row driving unit 110, a column driving unit 120, a first connecting line L1 and pixel units 130 arranged in an array; the pixel unit 130 includes at least two light emitting devices D1 emitting different colors of light and a common terminal C1, and a first electrode of each light emitting device D1 is connected to the common terminal C1; an output terminal of the row driving unit 110 is electrically connected to the common terminal C1 of a column of pixel units 130, and an output terminal of the column driving unit 120 is electrically connected to the second electrode of the light emitting device D1 of the same light emitting color in a row of pixel units 130; the common terminals C1 of the pixel units 130 in the same column are electrically connected by a first connection line L1, and the first connection line L1 is disposed at the same level as the common terminal C1.

Specifically, as shown in fig. 1, the display module further includes a substrate 100, and the substrate 100 is used for carrying the row driving unit 110, the column driving unit 120, and the pixel unit 130. Illustratively, the substrate 100 may be a printed circuit board. The pixel unit 130 may include at least two light emitting devices D1 different in emission color, and exemplarily, as shown in fig. 1, the pixel unit 130 may include three light emitting devices D1 different in emission color, which are a red light emitting device, a green light emitting device, and a blue light emitting device, respectively. The first electrode of the light emitting device D1 within the same pixel unit 130 is connected to the common terminal C1, so that the light emitting device D1 within the pixel unit 130 may implement a common electrode connection. Exemplarily, when the first electrode is an anode of the light emitting device D1, the common anode connection of the light emitting device D1 within the pixel unit 130 may be achieved. The substrate 100 is further provided with a pin C2 for electrically connecting the second electrode of the light emitting device D1 to the row driving unit 110 and the column driving unit 110. At this time, the light emitting devices D1 in the same pixel unit 130 have m +1 pins C2 in total, where m is the number of the light emitting devices D1 with different light emitting colors in the pixel unit 130. When the pixel unit 130 includes three light emitting devices D1 with different emitting colors, the pixel unit 130 has a total of 4 pins C2, wherein one pin C2 corresponds to the common terminal C1, and the other three pins C2 correspond to the second electrodes of the three light emitting devices D1, respectively.

The row driving unit 110 may be a row driving chip. Illustratively, the row driving unit 110 may be a chip of the catchment 2019 model. The display module may include a plurality of row driving units 110, and the specific number thereof may be determined according to the number of rows of the light emitting devices D1 and the number of rows of the light emitting devices D1 that each row driving unit 110 can drive. When the row driving unit 110 is used to drive the light emitting devices D1 in one row of the pixel units 130, the row driving unit 110 provides a driving current larger than the driving current required by the light emitting devices D1 in one row of the pixel units 130. The column driving unit 120 may be a column driving chip. Illustratively, the column driving unit 120 may be a chip of the model 2069 of the group creation. The display module may include a plurality of column driving units 120, the specific number of which may be determined according to the number of columns of the light emitting devices D1 and the number of columns of the light emitting devices D1 that each row driving unit 110 can drive. When the column driving unit 120 is used to drive at least some of the light emitting devices D1 in one column of the pixel units 130 according to the dynamic scanning manner of the display module, the number of the light emitting devices D1 driven by the column driving unit 120 is less than the number of the light emitting devices D1 driven by the row driving unit 110.

In addition, the common terminal C1 may be disposed on the surface of the substrate 100, and the common terminal C1 may be directly connected to the first electrode of the light emitting device D1. Illustratively, the material of the common terminal C1 may be copper foil. On the surface of base plate 100, the width ratio of common port C1 is bigger, through form first connecting line L1 simultaneously when forming common port C1, make first connecting line L1 and common port C1 with the layer setting, can avoid first connecting line L1 and common port C1 to punch and trade the layer and be connected, not only can guarantee first connecting line L1's reliability, can avoid additionally setting up a floor and be used for forming first connecting line L1 simultaneously, the circuit design of circuit connection in the display module has been simplified, reduce the required sheet layer setting of display module simultaneously, be favorable to reducing the number of layers setting of base plate, thereby be favorable to simplifying the structural design of display module, reduce the cost of display module. For example, in the prior art, when the circuit connection in the display module is designed by using a six-layer two-level circuit board, in the present embodiment, by disposing the first connecting line L1 and the common terminal C1 in the same layer, the circuit connection in the display module can be optimized to be designed by using a four-layer one-level circuit board.

With continued reference to fig. 1, the number of rows of the pixel unit 130 is greater than the number of columns of the pixel unit 130.

Specifically, the drive current of the row driver chip is larger than the drive current required for one row of pixels. When the number of rows of the pixel units 130 is greater than the number of columns of the pixel units 130, by setting an output terminal of the row driving unit 110 to be electrically connected to the common terminal C1 of one column of the pixel units 130, the row driving unit 110 can provide a driving current for one column of the pixel units 130 through the common terminal C1 of the pixel units 130, so that the row driving unit 110 can drive more light emitting devices D1, and the resource utilization rate of the row driving unit 110 is improved. Meanwhile, the number of the light emitting devices D1 driven by each row driving unit 110 is increased, so that the number of the row driving units 110 required by the display module can be reduced, and the number of the driving units of the display module is further reduced. In addition, an output terminal of the row driving unit 120 is electrically connected to the second electrode of the light emitting device D1 with the same color in one row of pixel units 130, so as to provide a driving current for the light emitting device D1 with the same color in one row of pixel units 130, thereby satisfying the requirement of the display module and ensuring the normal display of the display module on the basis of not additionally increasing the number of the row driving units 120.

Illustratively, the display module may have 48 columns by 135 rows of pixel cells. When an output terminal of the row driving unit 110 is electrically connected to the common terminal C1 of a column of the pixel units 130, the row driving unit 110 can provide a driving current to a column of 135 light emitting devices D1 through the common terminal C1, so that the row driving unit 110 can drive more light emitting devices D1 compared to the prior art that drives 48 light emitting devices, thereby improving the resource utilization of the row driving unit 110. When each row driving unit 110 is an 8-channel driving unit, 6 row driving units 110 are required in total, so that the number of the row driving units 110 required by the display module can be reduced, and the number of the driving units of the display module can be reduced compared with 18 row driving chips required in the prior art. Meanwhile, when each pixel unit 130 includes a red light emitting device, a green light emitting device, and a blue light emitting device, and an output terminal of the column driving unit 120 is electrically connected to the second electrode of the light emitting device D1 of the same color in one row of pixel units 130, each column driving unit 120 provides a driving current for the 48 light emitting devices D1 of the same color in one row of pixel units 130, thereby ensuring normal display of the display module. When each column driving unit 120 is a 16-channel light emitting device, 9 column driving units 120 are required for the light emitting device D1 of the same color, and 9 × 3 column driving units 120 are required for the light emitting device D1 of three emission colors. Compared with the prior art, the requirements of the display module can be met on the basis of not additionally increasing the number of the column driving units 120.

According to the technical scheme of the embodiment, when the number of rows of the pixel units is larger than the number of columns of the pixel units, the row driving unit can drive more light-emitting devices by setting one output end of the row driving unit to be electrically connected with the common end of one column of the pixel units, and the resource utilization rate of the row driving unit is improved. Meanwhile, the number of the light emitting devices driven by each row driving unit is increased, the number of the row driving units required by the display module can be reduced, and the number of the driving units of the display module is further reduced. In addition, an output end of the row driving unit is electrically connected with the second electrode of the light-emitting device with the same light-emitting color in the row of pixel units, so that the requirement of the display module can be met on the basis of not additionally increasing the number of the row driving units, and the normal display of the display module is ensured.

With continued reference to fig. 1, the common terminals C1 of the pixel units 130 in the same column are arranged in a straight line with the first connecting lines L1.

Specifically, common end C1 in same row of pixel unit 130 can arrange along the row direction, set up first connecting line L1 simultaneously and be the straight line, can avoid the hindrance of other structures when first connecting line L1 is connected with common end C1 in the extension process, and then can avoid first connecting line L1 and common end C1 to punch and trade the layer and be connected, avoided additionally setting up a plywood and be used for forming first connecting line L1, the circuit design of circuit connection in the display module has been simplified, reduce the required slab setting of display module simultaneously. Meanwhile, the first connecting line L1 is arranged in a straight line along the column direction, so that the distance requirement of different pixel units 130 along the row direction can be reduced, the tight arrangement among the pixel units 130 is facilitated, and the resolution of the display module is improved.

With continued reference to fig. 1, the display module further includes a second connection line L2, and the second electrodes of the light emitting devices D1 with the same light emitting color in one row of the pixel units 130 are connected through the second connection line L2; the second connection line L2 is disposed in a different layer from the pixel unit 130.

Specifically, it is exemplarily shown in fig. 1 that the pixel unit 130 includes light emitting devices D1 of three emission colors such that one pixel unit 130 corresponds to three second connection lines L2 for respectively connecting the second electrodes of the light emitting devices D1 of three different emission colors in a row of the pixel units 130. The second connection line L2 extends along the row direction, and is different from the extension direction of the first connection line L1, and the second connection line L2 and the pixel unit 130 are arranged in different layers, so that the circuit arrangement of the layer where the pixel unit 130 is located can be simplified, and meanwhile, the phenomenon that the pixel unit 130 is driven abnormally due to the fact that the first connection line L1 and the second connection line L2 are crossed and short-circuited can be avoided.

On the basis of the above technical solutions, fig. 2 is a schematic partial front view structure diagram of a display module according to an embodiment of the present invention. As shown in fig. 2, the display module further includes a first substrate 101 and a second substrate 102 stacked on each other; the first substrate 101 includes a first surface a and a second surface B disposed opposite to each other, the second substrate 102 includes a third surface C and a fourth surface D disposed opposite to each other, the first surface a is disposed on a side of the second surface B away from the third surface C, and the fourth surface D is disposed on a side of the third surface C away from the second surface B; the row driving unit 110 and the column driving unit 120 are disposed on the first surface a, the second surface B further includes a signal connection line L3, the second connection line L2 is disposed on the third surface C, and the pixel unit 130 is disposed on the fourth surface D; the row driving unit 110 and the column driving unit 120 are connected to a signal connection line L3, and the signal connection line L3 is used for providing driving signals for the row driving unit 110 and the column driving unit 120; the row driving unit 110 supplies a first driving signal to the first electrode of a column of the light emitting devices D1 through the common terminal C1, and the column driving unit 120 supplies a second driving signal to the second electrode of a row of the light emitting devices D1 through the second connection line L2.

In particular, the signal connection line L3 may be a clock signal line for providing a clock signal to the row driving unit 110 and the column driving unit 120. The signal connection line L3 may include a plurality of signal connection lines L3, and the row driving unit 110 and the column driving unit 120 correspond to different signal connection lines L3, respectively, so as to achieve independent control of the row driving unit 110 and the column driving unit 120. The row driving unit 110 provides a first driving signal to the first electrode of the column light emitting device D1 through the common terminal C1, and the column driving unit 120 provides a second driving signal to the second electrode of the row light emitting device D1 through the second connection line L2, and the first driving signal and the second driving signal are simultaneously asserted, thereby controlling a certain light emitting device D1 to emit light. Meanwhile, the light emitting device D1 and the common terminal C1 of the pixel unit 130 are arranged on the same layer board, so that the display module can realize normal driving of the pixel unit 130 only by two layers of substrates, the substrates are saved, and the simplified design and the thinned design of the display module are facilitated.

On the basis of the above technical solutions, the pixel unit includes three light emitting devices with different light emitting colors, the column driving unit includes three column driving sub-units, and one output end of each column driving sub-unit is electrically connected to the second electrodes of the light emitting devices with the same light emitting color in a row of pixel units.

In particular, each column drive subunit may be identical. Illustratively, each column driving subunit may be a column driving chip of the same model. When the pixel unit comprises three light-emitting devices with different light-emitting colors, the same pixel unit can correspond to the three column driving sub-units and is used for respectively driving the light-emitting devices with the three different light-emitting colors in the pixel unit in one row so as to meet the driving requirement of the display module.

On the basis of the technical solutions, the display module comprises at least one column driving unit, the at least one column driving unit comprises a plurality of output ends, and each output end of the column driving unit is electrically connected with the second electrode of the light emitting device with the same light emitting color in the pixel unit of one row.

Specifically, when the column driving unit includes a plurality of output terminals, each of the output terminals may be electrically connected to the second electrodes of the light emitting devices of the same light emission color in one row of the pixel units, so that the column driving unit may drive the light emitting devices of the same light emission color in a plurality of rows of the pixel units, reducing the arrangement of the column driving unit. When the pixel unit comprises light emitting devices of three light emitting colors and the column driving unit comprises three column driving sub-units, each column driving sub-unit comprises a plurality of output terminals, and the number of the output terminals is equal. At this time, the second electrodes of the light emitting devices with the same light emitting color in each row of pixel units are connected into a row, and then are correspondingly connected with one output end of one column driving subunit, and so on, so that each column driving subunit drives the light emitting devices with the same light emitting color in the plurality of rows of pixel units, and the arrangement of the column driving subunits is reduced.

On the basis of the technical schemes, the row driving unit comprises a plurality of output ends, and the number of the columns of the pixel units and the number of the output ends of the row driving unit are in a multiple relation.

In particular, the row driving unit may include a plurality of output terminals, each of which may be electrically connected to a common terminal of a column of pixel cells, so that the row driving unit may provide a driving current to a plurality of columns of pixel cells. When the column number of the pixel units in each display module is divided, the column number of the pixel units can be set to be a multiple of the number of the output ends of the row driving units, so that the display module can set the number of the row driving units according to the column number of the pixel units, the requirement of the display module can be met, and meanwhile the utilization rate of the row driving units can be improved to the maximum extent.

Fig. 3 is a schematic partial structure diagram of another display module according to an embodiment of the present invention. As shown in fig. 3, the row driving unit 110 includes at least two row driving sub-units 111, and the same output terminal of each row driving sub-unit 110 is connected to the common terminal C1 of the pixel units 130 in the same column.

In particular, it is exemplarily shown in fig. 3 that the row driving unit 110 includes two row driving sub-units 111. At least two row driving subunits 111 are the same row driving chip. By connecting the same output terminals of at least two row driving sub-units 111 with the common terminal C1 of the pixel units 130 in the same column, so that the at least two row driving sub-units 111 are connected in parallel to supply driving current to the light emitting devices D1 of the pixel units 130 in the same column, the driving capability of the row driving unit 110 can be ensured. For example, when the display module has 48 rows by 135 rows of pixel units and each row driving unit 110 is 8 channels, a total of 6 row driving units 110 are required. When each driving unit 110 includes two row driving sub-units 111, a total of 12 row driving sub-units 111 are required. At this time, the driving capability of the row driving unit 110 can be ensured, and meanwhile, compared with the prior art, the required number of the row driving sub-units 111 is reduced, and the number of the driving units of the display module is reduced.

The embodiment of the invention also provides a display panel. The display panel comprises the display module of any embodiment of the invention.

Specifically, the display panel can include a plurality of display module assemblies for the display panel size satisfies the demand. Since the display panel includes the display module provided in any embodiment of the present invention, the display panel has the advantages of the display module provided in any embodiment of the present invention, and details are not described herein.

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 display module is characterized by comprising a row driving unit, a column driving unit, a first connecting line and pixel units arranged in an array;

2. The display module of claim 1, wherein the number of rows of the pixel units is greater than the number of columns of the pixel units.

3. The display module according to claim 1, wherein the common terminals of the pixel units in the same row and the first connecting lines connected correspondingly are arranged in a straight line.

4. A display module according to any one of claims 1-3, further comprising a second connection line, through which the second electrodes of the light-emitting devices of the same emission color in a row of the pixel units are connected; the second connecting line and the pixel units are arranged in different layers.

5. The display module of claim 4, further comprising a first substrate and a second substrate arranged in a stack;

6. The display module according to claim 1, wherein the pixel unit comprises three light emitting devices with different colors, the column driving unit comprises three column driving sub-units, and an output terminal of each column driving sub-unit is electrically connected to the second electrode of the light emitting device with the same color in a row of the pixel units.

7. The display module according to claim 1, wherein the display module comprises at least one column driving unit, the at least one column driving unit comprises a plurality of output terminals, and each output terminal of the column driving unit is electrically connected to the second electrode of the light emitting device of the same light emitting color in one row of the pixel units.

8. The display module of claim 1, wherein the row driving unit comprises a plurality of output terminals, and the number of columns of the pixel units is a multiple of the number of output terminals of the row driving unit.

9. The display module of claim 1, wherein the row driving unit comprises at least two row driving sub-units, and the same output terminal of each row driving sub-unit is connected to the common terminal of the pixel units in the same column.

10. A display panel comprising the display module according to any one of claims 1 to 9.