Display module and display device

Abstract

The application provides a display module and a display device. The display module comprises a display panel and a circuit board. The light-emitting layer of the display panel comprises a plurality of first light-emitting units, a plurality of second light-emitting units and a plurality of third light-emitting units in the display area. Each of the first light-emitting unit, the second light-emitting unit and the third light-emitting unit is connected in series with a corresponding driving transistor of the pixel driving circuit layer of the display panel between a first high power voltage line, a second high power voltage line, a third high power voltage line and a low power voltage line. The first power chip, the second power chip and the third power chip of the circuit board are electrically connected to the first high power voltage line, the second high power voltage line and the third high power voltage line, respectively. According to the application, the light-emitting units in the display area are divided into three parts, each of which is connected in series with a corresponding driving transistor between a high power voltage line and a low power voltage line, so that the power supply current supply pressure is reduced, and the power chip load power consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of display technology, and more particularly to a display module and display device. Background Technology

[0002] With the widespread application of OLED technology, consumers have higher requirements for the brightness of panel screens and the overall battery life. However, high brightness requires high power consumption and high current, which will rapidly reduce battery life.

[0003] Therefore, existing display panels have a technical problem of high power consumption under power load, which needs to be improved. Summary of the Invention

[0004] This invention provides a display module and display device to alleviate the technical problem of high power consumption in existing display panels.

[0005] To solve the above problems, the technical solution provided by the present invention is as follows:

[0006] This invention provides a display module, which includes a display panel and a circuit board electrically connected to the display panel. The display panel includes:

[0007] The light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units located within the display area of ​​the display panel;

[0008] The pixel driving circuit layer includes multiple pixel driving circuits; each first light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line; each second light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line; each third light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line.

[0009] The circuit board is provided with a first power chip, a second power chip and a third power chip. The first power chip is electrically connected to the first high power voltage line, the second power chip is electrically connected to the second high power voltage line, and the third power chip is electrically connected to the third high power voltage line.

[0010] In the display module provided in this embodiment of the invention, the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit emit red, green, and blue light, respectively.

[0011] In the display module provided in the embodiments of the present invention, the first high power supply voltage line, the second high power supply voltage line and the third high power supply voltage line each include a plurality of first sub-parts extending along a first direction, a second sub-part extending along a second direction, and a third sub-part extending along the first direction. The first direction intersects with the second direction. The second sub-part is located between the plurality of first sub-parts and the third sub-part and is electrically connected to the plurality of first sub-parts and the third sub-part.

[0012] Wherein, the first sub-parts of the first high power supply voltage line are electrically connected to the driving transistors corresponding to the first light-emitting units, and the third sub-parts of the first high power supply voltage line are electrically connected to the first power chip.

[0013] The first sub-sections of the second high power supply voltage line are electrically connected to the driving transistors corresponding to the multiple second light-emitting units, and the third sub-section of the second high power supply voltage line is electrically connected to the second power chip.

[0014] The first sub-sections of the third high power supply voltage line are electrically connected to the driving transistors corresponding to the third light-emitting units, and the third sub-sections of the third high power supply voltage line are electrically connected to the third power chip.

[0015] In the display module provided in the embodiments of the present invention, the first sub-parts of the first high power supply voltage line, the first sub-parts of the second high power supply voltage line, and the first sub-parts of the third high power supply voltage line are all arranged on the same layer.

[0016] In the display module provided in this embodiment of the invention, in the direction from the center of the display area to the circuit board, the second sub-part of the first high power supply voltage line, the second sub-part of the second high power supply voltage line, and the second sub-part of the third high power supply voltage line are arranged sequentially. In a top view, the second sub-part of the first high power supply voltage line overlaps with a plurality of the first sub-parts of the second high power supply voltage line and the third high power supply voltage line, and the second sub-part of the second high power supply voltage line overlaps with a plurality of the first sub-parts of the third high power supply voltage line. The second sub-parts of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all disposed in different layers.

[0017] In the display module provided in the embodiments of the present invention, the second sub-section of the third high power supply voltage line is disposed on the same layer as the first sub-section of the third high power supply voltage line.

[0018] In the display module provided in the embodiments of the present invention, the third sub-parts of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all arranged on the same layer.

[0019] In the display module provided in this embodiment of the invention, the display panel further includes:

[0020] A light-shielding layer, including a light-shielding portion, wherein the light-shielding portion is located below the active layer of the driving transistor of the pixel driving circuit;

[0021] A first metal layer, located above the light-shielding layer, includes the gate of the driving transistor of the pixel driving circuit;

[0022] A second metal layer is located above the first metal layer and includes an upper electrode plate, wherein the upper electrode plate and the gate form a capacitor;

[0023] The third metal layer, located above the second metal layer, includes the source and drain of the driving transistor of the pixel driving circuit;

[0024] A fourth metal layer, located above the third metal layer, includes a connection portion that electrically connects the drain and the anode.

[0025] The first sub-part of the first high power voltage line, the first sub-part of the second high power voltage line, the first sub-part of the third high power voltage line, and the second sub-part of the third high power voltage line are all disposed in the same layer as the connecting portion of the fourth metal layer.

[0026] The second sub-section of the first high power supply voltage line is disposed on the same layer as the upper electrode plate, and the second sub-section of the second high power supply voltage line is disposed on the same layer as the light-shielding part;

[0027] The third sub-section of the first high power supply voltage line, the third sub-section of the second high power supply voltage line, and the third sub-section of the third high power supply voltage line are all disposed on the same layer as the source and / or the drain.

[0028] In the display module provided in this embodiment of the invention, the low power supply voltage line is arranged around the display area of ​​the display panel and electrically connected to the circuit board.

[0029] Furthermore, embodiments of the present invention also provide a display device, including a display module as described in any of the above embodiments.

[0030] The beneficial effects of the present invention are as follows: The present invention provides a display module and a display device; the display module includes a display panel and a circuit board electrically connected to the display panel, the display panel includes a light-emitting layer and a pixel driving circuit layer, the light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units and a plurality of third light-emitting units located in the display area of ​​the display panel; the pixel driving circuit layer includes a plurality of pixel driving circuits, each first light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line, each second light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line, and each third light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line; wherein, the circuit board is provided with a first power chip, a second power chip and a third power chip, the first power chip is electrically connected to the first high power supply voltage line, the second power chip is electrically connected to the second high power supply voltage line, and the third power chip is electrically connected to the third high power supply voltage line. This invention divides the light-emitting units in the display area of ​​the display panel into three parts. Each part of the light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between the high power supply voltage line and the low power supply voltage line. This reduces the current requirement of each part of the light-emitting unit, thereby reducing the current supply pressure at the power supply end and effectively reducing the load power consumption of the power chip. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the cross-sectional structure of the display module provided in an embodiment of the present invention;

[0033] Figure 2 This is a graph showing the trend of heat dissipation versus power consumption for the same power chip, provided in an embodiment of the present invention.

[0034] Figure 3 A circuit diagram of a pixel driving circuit provided in an embodiment of the present invention;

[0035] Figure 4 This is a schematic diagram of the cross-sectional structure of a display panel provided in an embodiment of the present invention. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this application, the term "exemplary" is used to mean "serving as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use the invention. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that the invention can be made without using these specific details. In other instances, well-known structures and processes will not be described in detail to avoid obscuring the description of the invention with unnecessary detail. Therefore, the invention is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0039] The present invention can alleviate the technical problem of high power consumption under power load in existing display panels.

[0040] To address the aforementioned problems, this application provides a display module. Specifically, the display module provided in this application includes a display panel and a circuit board electrically connected to the display panel. The display panel includes:

[0041] The light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units located within the display area of ​​the display panel;

[0042] The pixel driving circuit layer includes multiple pixel driving circuits; each first light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line; each second light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line; each third light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line.

[0043] The circuit board is provided with a first power chip, a second power chip and a third power chip. The first power chip is electrically connected to the first high power voltage line, the second power chip is electrically connected to the second high power voltage line, and the third power chip is electrically connected to the third high power voltage line.

[0044] The display module provided in this application will be described in detail below through specific embodiments.

[0045] In one embodiment, please refer to Figure 1 and Figure 3 ,like Figure 1 As shown, Figure 1 This is a cross-sectional structural diagram of a display module provided in an embodiment of the present invention; the display module provided in an embodiment of the present invention includes a display panel 01 and a circuit board 02 electrically connected to the display panel 01, the display panel 01 including:

[0046] The light-emitting layer (not shown in the figure) includes a plurality of first light-emitting units 10, a plurality of second light-emitting units 20 and a plurality of third light-emitting units 30 located in the display area 011 of the display panel 01;

[0047] A pixel driving circuit layer (not shown in the figure) includes multiple pixel driving circuits; each first light-emitting unit 10 and the driving transistor of the corresponding pixel driving circuit are connected in series between a first high power supply voltage line (including a first sub-section 101, a second sub-section 102, and a third sub-section 103) and a low power supply voltage line 40; each second light-emitting unit 20 and the driving transistor of the corresponding pixel driving circuit are connected in series between a second high power supply voltage line (including a first sub-section 201, a second sub-section 202, and a third sub-section 203) and the low power supply voltage line 40; each third light-emitting unit 30 and the driving transistor of the corresponding pixel driving circuit are connected in series between a third high power supply voltage line (including a first sub-section 301, a second sub-section 302, and a third sub-section 303) and the low power supply voltage line 40;

[0048] The circuit board 02 is provided with a first power chip 50, a second power chip 60 and a third power chip 70. The first power chip 50 is electrically connected to the first high power voltage line, the second power chip 60 is electrically connected to the second high power voltage line, and the third power chip 70 is electrically connected to the third high power voltage line.

[0049] Specifically, in this embodiment of the invention, the input voltage VDD (high power supply voltage) in the display panel is divided into three paths: a first high power supply voltage line, a second high power supply voltage line, and a third high power supply voltage line. These three high power supply voltage lines supply multiple first light-emitting units, multiple second light-emitting units, and multiple third light-emitting units in the display panel, respectively. While ensuring high brightness display for each light-emitting unit, the power supply voltage load power consumption can be effectively reduced, the power chip power consumption can be reduced, the heat of the power chip can be effectively reduced, the battery supply pressure can be reduced, and the overall battery life can be extended.

[0050] Furthermore, for example, when the pixel circuit remains unchanged, the total number of pixel light-emitting units remains unchanged, and the number of the first, second, and third light-emitting units is the same. Assuming that the number of the first, second, and third light-emitting units is 10,000 each, and the resistance of each light-emitting unit is 1Ω under the same brightness condition; when driven by a single power IC, the power consumption P = I... 2 If R remains constant with I = 1A, then P = 1 2 *(1*10000*3)=30000W; When three power chips are used to drive the first, second, and third light-emitting units respectively, then the power consumption Pr of the first light-emitting unit is 1. 2 *(1*10000*3)=10000W, the power consumption of the second light-emitting unit Pg=1 2 *(1*10000*3)=10000W, the power consumption of the third light-emitting unit Pb=1 2 *(1*10000*3)=10000W; Compared to the two driving modes, the power consumption of a single power IC is significantly reduced; Simultaneously, the power consumption in terms of heat energy and heat generation also decreases. Finally, P1+P_heat > Pr+Pg+Pb+P_heat, meaning that the total power consumption (the sum of power consumption and heat dissipation) generated when using three power chips to drive the first, second, and third light-emitting units respectively is less than the total power consumption when using only one power chip. For details, please refer to [link / reference]. Figure 2 , Figure 2The horizontal axis represents the power consumption of a power chip, and the vertical axis represents the heat dissipation of a power chip. P0 represents the power consumption generated when a power chip drives all the light-emitting units, and Q1 represents the power consumption generated when the same power chip drives only one group of the first, second, and third light-emitting units. Q1 represents the heat dissipation corresponding to P1. Figure 2 In the curve graph, it can be clearly seen that P1 is one-third of P0, but the heat dissipation Q1 is significantly less than one-third of Q0. Therefore, in this embodiment of the invention, the input voltage VDD (high power supply voltage) in the display panel is divided into three paths, which are respectively supplied to the first light-emitting unit, the second light-emitting unit and the third light-emitting unit in the display panel. While ensuring that each light-emitting unit displays at high brightness, the heat dissipation generated by each power chip is effectively reduced, thereby effectively reducing the total power consumption of the power load and increasing the overall battery life.

[0051] Please see Figure 3 , combined Figure 3 The pixel structure of the pixel driving circuit in the embodiments of the present invention will be briefly described. Each pixel of the pixel driving circuit according to the embodiments of the present invention has a 7T1C pixel structure, wherein the 7T1C pixel structure includes an organic light-emitting diode (OLED), a first transistor T1, a second transistor T2, a third transistor T3, a fourth transistor T4, a fifth transistor T5, a sixth transistor T6, a seventh transistor T7, and a capacitor C1.

[0052] The gate of the first transistor T1 is electrically connected to the first node a, one end of its source / drain is electrically connected to the second node b, and the other end of its source / drain is electrically connected to the fourth node d.

[0053] The gate of the second transistor T2 is used to receive the scan signal Scan(n), one end of its source / drain is used to receive the data voltage Vdata, and the other end of its source / drain is electrically connected to the second node b.

[0054] The gate of the third transistor T3 is used to receive the scan signal Scan(n), and one end of its source / drain is electrically connected to the third node c, while the other end of its source / drain is electrically connected to the fourth node d.

[0055] The gate of the fourth transistor T4 is used to receive the scan signal Scan(n-1), one end of its source / drain is electrically connected to the third node c, and the other end of its source / drain is used to receive the initialization signal VI.

[0056] The gate of the fifth transistor T5 is used to receive the enable signal EM, one end of its source / drain is used to receive the high power supply voltage VDD, and the other end of its source / drain is electrically connected to the second node b.

[0057] The gate of the sixth transistor T6 is used to receive the enable signal EM. One end of its source / drain is connected to the anode of the organic light-emitting diode OLED, and the other end of its source / drain is electrically connected to the fourth node d.

[0058] The gate of the seventh transistor T7 is used to receive the scan signal Scan(n-1), one end of its source / drain is connected to the anode of the organic light-emitting diode OLED, and the other end of its source / drain is used to receive the initialization signal VI.

[0059] The first end of capacitor C1 is connected to the first node a, and the second end is connected to one of the source / drain terminals of the fifth transistor T5.

[0060] The cathode of an organic light-emitting diode (OLED) is used to receive a low supply voltage (VSS).

[0061] It is understood that in other embodiments of the present invention, the pixel structure of the pixel driving circuit may also be 2T1C or 3T1C, etc.

[0062] In this embodiment of the invention, the data voltage Vdata enters the pixel light-emitting unit, and after a series of timing operations, it lights up the OLED light-emitting diode. The voltage difference between VDD and VSS determines the brightness of the display panel; the greater the voltage difference, the higher the brightness.

[0063] This invention provides a display module and a display device. The display module includes a display panel and a circuit board electrically connected to the display panel. The display panel includes a light-emitting layer and a pixel driving circuit layer. The light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units located in the display area of ​​the display panel. The pixel driving circuit layer includes a plurality of pixel driving circuits. Each first light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line. Each second light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line. Each third light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line. The circuit board is provided with a first power chip, a second power chip, and a third power chip. The first power chip is electrically connected to the first high power supply voltage line, the second power chip is electrically connected to the second high power supply voltage line, and the third power chip is electrically connected to the third high power supply voltage line. This invention divides the light-emitting units in the display area of ​​the display panel into three parts. Each part of the light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between the high power supply voltage line and the low power supply voltage line. This reduces the current requirement of each part of the light-emitting unit, thereby reducing the current supply pressure at the power supply end and effectively reducing the load power consumption of the power chip.

[0064] In one embodiment, please refer to Figure 1 The first light-emitting unit 10, the second light-emitting unit 20, and the third light-emitting unit 30 emit red, green, and blue light, respectively.

[0065] Specifically, in the display panel 01, the multiple first light-emitting units 10 emit the same color, the multiple second light-emitting units 20 emit the same color, and the multiple third light-emitting units 30 emit the same color; the first light-emitting unit 10, the second light-emitting unit 20, and the third light-emitting unit 30 emit different colors, and their light-emitting colors are one of red, green, and blue, respectively.

[0066] In one embodiment, such as Figure 1As shown, the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line each include a plurality of first sub-sections (101, 201, 301) extending along a first direction X, a second sub-section (102, 202, 302) extending along a second direction Y, and a third sub-section (103, 203, 303) extending along the first direction X. The first direction X intersects the second direction Y, and the second sub-section is located between the plurality of first sub-sections and the third sub-section and is electrically connected to the plurality of first sub-sections and the third sub-section.

[0067] Among them, the plurality of first sub-parts 101 of the first high power supply voltage line are electrically connected to the driving transistors corresponding to the plurality of first light-emitting units 10, and the third sub-part 103 of the first high power supply voltage line is electrically connected to the first power chip 50.

[0068] The plurality of first sub-sections 201 of the second high power supply voltage line are electrically connected to the driving transistors corresponding to the plurality of second light-emitting units 20, and the third sub-section 203 of the second high power supply voltage line is electrically connected to the second power chip 60.

[0069] The plurality of first sub-sections 301 of the third high power supply voltage line are electrically connected to the driving transistors corresponding to the plurality of third light-emitting units 30, and the third sub-section 303 of the third high power supply voltage line is electrically connected to the third power chip 70.

[0070] In one embodiment, such as Figure 1 As shown, the first sub-section 101 of the first high power supply voltage line, the first sub-section 201 of the second high power supply voltage line, and the first sub-section 301 of the third high power supply voltage line are all arranged on the same layer.

[0071] In one embodiment, such as Figure 1 As shown, in the direction from the center of the display area 011 to the circuit board 02, the second sub-part 102 of the first high power voltage line, the second sub-part 202 of the second high power voltage line, and the second sub-part 302 of the third high power voltage line are arranged sequentially. In a top view, the second sub-part 102 of the first high power voltage line overlaps with multiple first sub-parts of the second high power voltage line and the third high power voltage line, and the second sub-part 202 of the second high power voltage line overlaps with multiple first sub-parts 301 of the third high power voltage line. The second sub-parts of the first high power voltage line, the second high power voltage line, and the third high power voltage line are all arranged in different layers.

[0072] In one embodiment, such as Figure 1As shown, the second sub-section 302 of the third high power supply voltage line is disposed on the same layer as the first sub-section 301 of the third high power supply voltage line.

[0073] In one embodiment, such as Figure 1 As shown, the third sub-sections of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all arranged on the same layer.

[0074] It is understood that the first sub-section, the second sub-section, and the third sub-section of the first high power supply voltage line are all connected by vias; the second sub-section and the third sub-section of the second high power supply voltage line are also connected by vias; and the first sub-section, the second sub-section, and the third sub-section of the third high power supply voltage line are also connected by vias.

[0075] In one embodiment, please refer to Figure 4 , Figure 4 This is a schematic cross-sectional view of the display panel in the display module provided in an embodiment of the present invention. The display panel 01 further includes:

[0076] The light-shielding layer includes a light-shielding portion 81, which is located below the active layer 82 of the driving transistor of the pixel driving circuit.

[0077] A first metal layer, located above the light-shielding layer, includes the gate 83 of the driving transistor of the pixel driving circuit;

[0078] The second metal layer, located above the first metal layer, includes an upper electrode plate 84, which forms a capacitor with the gate 83.

[0079] The third metal layer, located above the second metal layer, includes the source 85 and drain 86 of the driving transistor of the pixel driving circuit;

[0080] The fourth metal layer, located above the third metal layer, includes a connection portion 87, which electrically connects the drain electrode 86 and the anode 88.

[0081] The first sub-part of the first high power voltage line, the first sub-part of the second high power voltage line, the first sub-part of the third high power voltage line, and the second sub-part of the third high power voltage line are all disposed in the same layer as the connection portion 87 of the fourth metal layer.

[0082] The second sub-section of the first high power supply voltage line is disposed on the same layer as the upper electrode plate, and the second sub-section of the second high power supply voltage line is disposed on the same layer as the light-shielding part 81;

[0083] The third sub-section of the first high power supply voltage line, the third sub-section of the second high power supply voltage line, and the third sub-section of the third high power supply voltage line are all disposed on the same layer as the source 85 and / or the drain 86.

[0084] It should be noted that there are no strict restrictions on which specific metal layers the three sub-parts of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are distributed on. As long as the intersecting parts are on different layers, the non-intersecting parts can be routed on any network.

[0085] In one embodiment, the low power supply voltage line is arranged around the display area of ​​the display panel 01 and electrically connected to the circuit board 02; specifically, three power chips output three positive voltages VDD1 (first high power supply voltage), VDD2 (second high power supply voltage), VDD3 (third high power supply voltage) and one negative voltage VSS (low power supply voltage), respectively. VSS is connected together on the circuit board 02 and connected to the display panel as a cathode. VDD1 provides current to the first light-emitting unit, VDD2 provides current to the second light-emitting unit 20, and VDD3 provides current to the third light-emitting unit 30.

[0086] Accordingly, this application also provides a display device, including the display module as provided in the embodiments of the present invention.

[0087] As can be seen from the above embodiments:

[0088] This invention provides a display module and a display device. The display module includes a display panel and a circuit board electrically connected to the display panel. The display panel includes a light-emitting layer and a pixel driving circuit layer. The light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units located within the display area of ​​the display panel. The pixel driving circuit layer includes a plurality of pixel driving circuits. Each first light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line. Each second light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line. Each third light-emitting unit is connected in series with a driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line. The circuit board is provided with a first power chip, a second power chip, and a third power chip. The first power chip is electrically connected to the first high power supply voltage line, the second power chip is electrically connected to the second high power supply voltage line, and the third power chip is electrically connected to the third high power supply voltage line. This invention divides the light-emitting units in the display area of ​​the display panel into three parts. Each part of the light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between the high power supply voltage line and the low power supply voltage line. This reduces the current requirement of each part of the light-emitting unit, thereby reducing the current supply pressure at the power supply end and effectively reducing the load power consumption of the power chip.

[0089] In summary, although the present invention has been disclosed above with reference to preferred embodiments, the above preferred embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A display module, characterized in that, The display panel includes a display panel and a circuit board electrically connected to the display panel, the display panel comprising: The light-emitting layer includes a plurality of first light-emitting units, a plurality of second light-emitting units, and a plurality of third light-emitting units located within the display area of ​​the display panel; The pixel driving circuit layer includes multiple pixel driving circuits; each first light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a first high power supply voltage line and a low power supply voltage line; each second light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a second high power supply voltage line and the low power supply voltage line; each third light-emitting unit is connected in series with the driving transistor of the corresponding pixel driving circuit between a third high power supply voltage line and the low power supply voltage line. The circuit board is provided with a first power chip, a second power chip and a third power chip. The first power chip is independently electrically connected to the first high power voltage line and provides a first high power voltage. The second power chip is independently electrically connected to the second high power voltage line and provides a second high power voltage. The third power chip is independently electrically connected to the third high power voltage line and provides a third high power voltage. The first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line each include a plurality of first sub-parts extending along a first direction, a second sub-part extending along a second direction, and a third sub-part extending along the first direction. The first direction intersects with the second direction. The second sub-part is located between the plurality of first sub-parts and the third sub-part and is electrically connected to the plurality of first sub-parts and the third sub-part. Furthermore, the second sub-parts of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all disposed in different layers. Wherein, the first sub-parts of the first high power supply voltage line are electrically connected to the driving transistors corresponding to the first light-emitting units, and the third sub-parts of the first high power supply voltage line are electrically connected to the first power chip. The first sub-sections of the second high power supply voltage line are electrically connected to the driving transistors corresponding to the multiple second light-emitting units, and the third sub-section of the second high power supply voltage line is electrically connected to the second power chip. The first sub-sections of the third high power supply voltage line are electrically connected to the driving transistors corresponding to the third light-emitting units, and the third sub-sections of the third high power supply voltage line are electrically connected to the third power chip.

2. The display module according to claim 1, characterized in that, The first light-emitting unit, the second light-emitting unit, and the third light-emitting unit emit red, green, and blue light, respectively.

3. The display module according to claim 1, characterized in that, The first sub-sections of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all arranged on the same layer.

4. The display module according to claim 3, characterized in that, In the direction from the center of the display area toward the circuit board, the second sub-parts of the first high power supply voltage line, the second sub-parts of the second high power supply voltage line, and the second sub-parts of the third high power supply voltage line are arranged sequentially. In a top view, the second sub-parts of the first high power supply voltage line overlap with a plurality of the first sub-parts of the second high power supply voltage line and the third high power supply voltage line, and the second sub-parts of the second high power supply voltage line overlap with a plurality of the first sub-parts of the third high power supply voltage line. The second sub-parts of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all disposed in different layers.

5. The display module according to claim 4, characterized in that, The second sub-section of the third high power supply voltage line is disposed on the same layer as the first sub-section of the third high power supply voltage line.

6. The display module according to claim 5, characterized in that, The third sub-sections of the first high power supply voltage line, the second high power supply voltage line, and the third high power supply voltage line are all arranged on the same layer.

7. The display module according to claim 6, characterized in that, The display panel also includes: A light-shielding layer, including a light-shielding portion, wherein the light-shielding portion is located below the active layer of the driving transistor of the pixel driving circuit; A first metal layer, located above the light-shielding layer, includes the gate of the driving transistor of the pixel driving circuit; A second metal layer is located above the first metal layer and includes an upper electrode plate, wherein the upper electrode plate and the gate form a capacitor; The third metal layer, located above the second metal layer, includes the source and drain of the driving transistor of the pixel driving circuit; A fourth metal layer, located above the third metal layer, includes a connection portion that electrically connects the drain and the anode. The first sub-part of the first high power voltage line, the first sub-part of the second high power voltage line, the first sub-part of the third high power voltage line, and the second sub-part of the third high power voltage line are all disposed in the same layer as the connecting portion of the fourth metal layer. The second sub-section of the first high power supply voltage line is disposed on the same layer as the upper electrode plate, and the second sub-section of the second high power supply voltage line is disposed on the same layer as the light-shielding part; The third sub-section of the first high power supply voltage line, the third sub-section of the second high power supply voltage line, and the third sub-section of the third high power supply voltage line are all disposed on the same layer as the source and / or the drain.

8. The display module according to any one of claims 1 to 7, characterized in that, The low power supply voltage line is arranged around the display area of ​​the display panel and is electrically connected to the circuit board.

9. A display device, characterized in that, Includes the display module as described in any one of claims 1 to 8.

Images