Display substrate and display device

Abstract

The application provides a display substrate and a display device. The display substrate comprises a substrate and a plurality of pixel units arranged on the substrate. Each pixel unit comprises a plurality of sub-pixels. Each sub-pixel comprises a pixel driving circuit and a light-emitting unit. The substrate comprises a plurality of data lines arranged along a first direction and extending along a second direction. The pixel driving circuit is electrically connected with the data line. The light-emitting color of the sub-pixel corresponding to the pixel driving circuit connected with each data line is the same. The embodiment of the application can reduce the voltage jump on the data line, thereby reducing the possibility of RC delay, and helping to improve the display effect.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the technical field of display, and in particular, to a display substrate and a display device. BACKGROUND

[0002] OLED (Organic Light-Emitting Diode) display substrate is widely used in various display devices due to its advantages of self-emission, high brightness, low energy consumption, etc. In the existing display substrate, data lines are usually used to transmit data signals required for different color sub-pixels to emit light. Since the data lines will generate parasitic capacitance with other metal layers in the pixel circuit, in some use scenarios, such as a pure color picture or a picture with relatively single color, the voltage of the data signal on the data line will constantly jump, which may cause RC delay, further shorten the effective time of data line charging, and may affect the display effect. SUMMARY

[0003] Embodiments of the present application provide a display substrate and a display device to solve the problem that the display device may affect the display effect due to the jump of data signals in some use scenarios.

[0004] To solve the above problem, the present application is implemented as follows:

[0005] In a first aspect, embodiments of the present application provide a display substrate, comprising a substrate and a plurality of pixel units arranged on the substrate, each pixel unit comprising a plurality of sub-pixels, each sub-pixel comprising a pixel driving circuit and a light emitting unit, the substrate comprising a plurality of data lines arranged along a first direction and extending along a second direction, the pixel driving circuit being electrically connected to the data line, wherein the light emitting color of the sub-pixel corresponding to the pixel driving circuit connected to each data line is the same.

[0006] In some embodiments, the display substrate further comprises a plurality of driving circuit columns arranged along the first direction and extending along the second direction, each driving circuit column comprising a plurality of pixel driving circuits, wherein the light emitting color of the sub-pixel corresponding to each pixel driving circuit in each driving circuit column is the same.

[0007] In some embodiments, each pixel unit comprises at least one red sub-pixel, at least one blue sub-pixel and at least one green sub-pixel, the display substrate comprising a first light emitting unit column and a second light emitting unit column, in the first light emitting unit column, the light emitting unit of the red sub-pixel and the light emitting unit of the blue sub-pixel are arranged alternately, and the light emitting unit in the second light emitting unit column is the light emitting unit of the green sub-pixel.

[0008] In some embodiments, the first light emitting unit column and the second light emitting unit column are arranged along the first direction and extend along the second direction.

[0009] In some embodiments, the first light emitting unit column and the second light emitting unit column are arranged alternately along the first direction.

[0010] In some embodiments, a projection of the first light emitting unit column on the substrate overlaps with a projection of the first driving circuit column on the substrate and does not overlap with a projection of the second driving circuit column on the substrate, wherein the first driving circuit column is a driving circuit column corresponding to green sub-pixels, and the second driving circuit column is a driving circuit column corresponding to red sub-pixels or blue sub-pixels.

[0011] In some embodiments, the first driving circuit column and the second driving circuit column are arranged alternately along the first direction, and in the second driving circuit column, a driving circuit column corresponding to red sub-pixels and a driving circuit column corresponding to blue sub-pixels are arranged alternately.

[0012] In some embodiments, a pixel driving circuit in each driving circuit column corresponds to light emitting units in light emitting unit columns located on both sides of the driving circuit column.

[0013] In some embodiments, light emitting units of red sub-pixels located in the same first light emitting unit column correspond to pixel driving circuits in the same driving circuit column.

[0014] Light emitting units of blue sub-pixels located in the same first light emitting unit column correspond to pixel driving circuits in the same driving circuit column.

[0015] Light emitting units located in the same second light emitting unit column correspond to pixel driving circuits in different driving circuit columns respectively.

[0016] In a second aspect, embodiments of the present application provide a display device, including the display substrate of any one of the first aspect.

[0017] In embodiments of the present application, the light emitting colors of sub-pixels corresponding to pixel driving circuits connected to each data line are the same, so that when displaying a pure color picture or a picture with relatively uniform colors, the voltages of data signals provided by each data line to sub-pixels in different rows are substantially equal, reducing voltage jumps on the data line, thereby reducing adverse effects caused by RCdelay, and helping to improve display effect. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application will be briefly introduced. Obviously, the drawings in the following description only constitute some of the embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0019] Figure 1 is a structural schematic diagram of a display substrate in the related art;

[0020] Figure 2 is a structural schematic diagram of a display substrate in an embodiment of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely in the following description with reference to the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] The embodiments of the present application provide a display substrate.

[0023] In one embodiment, the display substrate comprises a substrate and a plurality of pixel units arranged on the substrate, each pixel unit comprising a plurality of sub-pixels, each sub-pixel comprising a pixel driving circuit and a light emitting unit.

[0024] The substrate comprises a plurality of data lines arranged along a first direction and extending along a second direction, as shown in Figure 1 In the embodiment, the first direction is the horizontal direction, or the row direction, as shown in Figure 1 The second direction is the vertical direction, or the column direction, as shown in Figure 1

[0025] The pixel driving circuit is electrically connected to the data line to provide a data signal required for driving the light emitting unit to emit light through the data line.

[0026] For example, in some embodiments, one pixel unit comprises a red sub-pixel, a blue sub-pixel and a green sub-pixel, and the pixel driving circuits connected to one data line can all be the pixel driving circuits corresponding to the red sub-pixel, or all be the pixel driving circuits corresponding to the blue sub-pixel, or all be the pixel driving circuits corresponding to the green sub-pixel.

[0027] As shown in Figure 1 and Figure 2 ​As shown, in the embodiment, the display substrate includes data lines D1, D2, D3, D4, …, and further includes a plurality of sub-pixels. For example, a red sub-pixel includes a red light emitting unit R and a pixel driving circuit DR corresponding to the red light emitting unit, a blue sub-pixel includes a blue light emitting unit B and a pixel driving circuit DB corresponding to the blue light emitting unit, and a green sub-pixel includes a green light emitting unit G and a pixel driving circuit DG corresponding to the green light emitting unit.

[0028] In the related art, the sub-pixels corresponding to the same data line can be sub-pixels of different colors. For example, a data line can be connected to the pixel driving circuits corresponding to a red sub-pixel and a blue sub-pixel at the same time. In the implementation, the data line needs to provide data signals required by the red sub-pixel and the blue sub-pixel. For example, when the data line provides the data signal required by the red sub-pixel, the pixel driving circuit of the red sub-pixel is connected to the data line under the control of a corresponding control signal, and the pixel driving circuit of the blue sub-pixel is disconnected from the data line under the control of a corresponding control signal. The same applies to other sub-pixels.

[0029] Because the data line needs to provide different data signals, the voltage on the data line can be constantly changing. For example, when displaying a pure white picture, the data signal required by the red sub-pixel is 3.3V, and the driving signal required by the blue sub-pixel is 5V. In this way, the voltage on the data line changes in the form of 3.3V, 5V, 3.3V, 5V, ….

[0030] In actual use, the display device displays pictures, most of which are color pictures. The local area in the color picture can be pure color, or the color and brightness of the picture in the local area can be relatively close. In this way, the signal on the data line is changing.

[0031] In the technical solution of the embodiment, the light emitting colors of the sub-pixels corresponding to the pixel driving circuits connected to each data line are the same. In this way, when a pure white picture needs to be displayed, the voltage on the data line corresponding to the red sub-pixel is kept relatively constant in the form of 3.3V, 3.3V, 3.3V, 3.3V, ….

[0032] In this way, in the embodiment, the light emitting colors of the sub-pixels corresponding to the pixel driving circuits connected to each data line are the same. When displaying a pure color picture or a picture with relatively uniform color on the full screen or in a local area, the voltage of the data signal provided by each data line to the sub-pixels in different rows is basically equal, which reduces the voltage change on the data line and thus reduces the adverse effects caused by RC delay, thereby helping to improve the display effect.

[0033] In some embodiments, each pixel unit includes at least one red sub-pixel, at least one blue sub-pixel, and at least one green sub-pixel. In some embodiments, each pixel unit may specifically include one red sub-pixel, one blue sub-pixel, and two green sub-pixels.

[0034] like Figure 2 As shown, each sub-pixel is arranged according to a certain rule. In this embodiment, the display substrate includes a first light-emitting unit column and a second light-emitting unit column. Both the first light-emitting unit column and the second light-emitting unit column are arranged along a first direction and extend along a second direction.

[0035] In the first column of light-emitting units, the light-emitting units of red sub-pixels and blue sub-pixels are alternately set. In the second column of light-emitting units, all light-emitting units are light-emitting units of green sub-pixels. That is to say, the first column of light-emitting units consists of light-emitting units of red and blue sub-pixels, while the second column of light-emitting units consists of light-emitting units of green sub-pixels.

[0036] In some embodiments, along a first direction, a first light-emitting unit column and a second light-emitting unit column are alternately arranged, such that a red sub-pixel and a blue sub-pixel in the first light-emitting unit column and two green sub-pixels in the second light-emitting unit column together constitute the sub-pixels included in a pixel unit.

[0037] In some embodiments, the display substrate further includes a row of driving circuits arranged along a first direction and extending along a second direction, each row of driving circuits including a plurality of pixel driving circuits, wherein the sub-pixels corresponding to each pixel driving circuit in each row of driving circuits have the same emission color.

[0038] In some embodiments, the orthographic projection of the first light-emitting unit array on the substrate overlaps with the orthographic projection of the first driving circuit array on the substrate, while the orthographic projection of the first light-emitting unit array on the substrate does not overlap with the orthographic projection of the second driving circuit array on the substrate.

[0039] like Figure 1 As shown, in the related technology, the positions of each pixel driving circuit and the light-emitting unit driven by that pixel driving circuit correspond spatially. Specifically, the orthographic projection of the pixel driving circuit on the substrate and the orthographic projection of the light-emitting unit driven by that pixel driving circuit on the substrate overlap.

[0040] like Figure 2As shown, in the technical solution of the embodiment, each pixel driving circuit is spatially separated from the position of the light emitting unit driven by the pixel driving circuit. In the embodiment, the first driving circuit column is the driving circuit column corresponding to the green sub-pixel, and the second driving circuit column is the driving circuit column corresponding to the red sub-pixel or the blue sub-pixel. The orthographic projection of the light emitting unit of one green sub-pixel on the substrate overlaps the orthographic projection of the pixel driving circuit of one blue sub-pixel or one green sub-pixel on the substrate. Similarly, the orthographic projection of the light emitting unit of one red sub-pixel on the substrate overlaps the orthographic projection of the pixel driving circuit of one green sub-pixel on the substrate, and the orthographic projection of the light emitting unit of one blue sub-pixel on the substrate overlaps the orthographic projection of the pixel driving circuit of one green sub-pixel on the substrate.

[0041] As shown in the technical solution of the embodiment of the present disclosure, Figure 2 For example, taking the column where the data line D1 is located as an example, the driving circuits DG connected to the data line D1 are electrically connected to the green light emitting units G located on the opposite sides thereof, for example, the driving circuits DG on the same column are electrically connected to the green light emitting units G on the opposite right side in the first row and the opposite left side in the second row, and so on.

[0042] For another example, taking the column where the data line D2 is located as an example, the driving circuits DB connected to the data line D2 are electrically connected to the blue light emitting units B located on the opposite sides thereof, for example, the driving circuits DB on the same column are electrically connected to the blue light emitting units B on the opposite right side in the first row and the opposite left side in the second row, and so on. In this way, the driving circuits on the same column can be electrically connected to the light emitting units of the same color, and at the same time, the pixel arrangement of the light emitting units R, G, B, G, R, G, B, G, … can be realized, which is beneficial to the pixel sharing of red and blue pixels.

[0043] It should be noted that the “first row” and “second row” mentioned above are illustrative descriptions, and in actual design, they can be different two rows, which are not limited in the embodiment. It should be understood that in the embodiment, the traces located in different layers are exemplarily represented by the connection lines of different thicknesses, although from the angle shown in the figure, there is a certain intersection between the cross-over lines connecting the pixel driving circuits and the data lines, but in fact, they are located in different film layers, specifically, the cross-over lines are located on the side away from the substrate, and the two are insulated from each other. Figure 2 As shown in the figure, from the angle shown in the figure, there is a certain intersection between the cross-over lines connecting the pixel driving circuits and the data lines, but in fact, they are located in different film layers, specifically, the cross-over lines are located on the side away from the substrate, and the two are insulated from each other.

[0044] It should be understood that the shapes and sizes of the anodes of the sub-pixels are not necessarily completely the same, and at the same time, due to the arrangement requirements of the sub-pixels, the anode of one sub-pixel may also partially overlap with the pixel driving circuits corresponding to multiple sub-pixels, but overall, the positions of the anode images of each sub-pixel and the light emitting unit are approximately corresponding, and therefore, in the embodiment,Figure 1 and Figure 2 The figure shows the relative positions of the pixel driving circuit and the light emitting unit.

[0045] In some embodiments, in the first direction, the first driving circuit column and the second driving circuit column are arranged alternately, and in the second driving circuit column, the driving circuit column corresponding to the red sub-pixel and the driving circuit column corresponding to the blue sub-pixel are arranged alternately.

[0046] It can be understood that the driving circuit columns are arranged in the first direction in the manner of green driving circuit column, blue driving circuit column, green driving circuit column, red driving circuit column, green driving circuit column, blue driving circuit column, and so on. Here, the green driving circuit column refers to the driving circuit column in which the pixel driving circuit corresponding to the red sub-pixel is located, and the same applies to the other driving circuit columns.

[0047] In some embodiments, the pixel driving circuit in each driving circuit column corresponds to the light emitting unit in the light emitting unit column located on both sides of the driving circuit column. In this way, the corresponding light emitting unit is driven by the pixel driving circuit, and at the same time, the wiring distance can be reduced.

[0048] In some embodiments, the light emitting unit of the red sub-pixel located in the same first light emitting unit column corresponds to the pixel driving circuit in the same driving circuit column.

[0049] The light emitting unit of the blue sub-pixel located in the same first light emitting unit column corresponds to the pixel driving circuit in the same driving circuit column.

[0050] The light emitting units located in the same second light emitting unit column correspond to the pixel driving circuits in different driving circuit columns, respectively.

[0051] The technical solution of the present embodiment can reduce the voltage jump on the data line, thereby reducing the possibility of RC delay, helping to prolong the effective time of data line charging, and helping to improve the uniformity of display effect.

[0052] In addition, the process of voltage jump on the data line is actually equivalent to the charging and discharging process of the parasitic capacitor formed between the data line and other metal layers, which will cause additional energy loss. In the technical solution of the present embodiment, since the voltage jump on the data line is reduced, the energy damage is also reduced, which helps to reduce the energy consumption of the display device.

[0053] Further, for specific use scenarios, especially when the full display area or the local display area displays a pure color image or a relatively single image, the display effect can be effectively improved.

[0054] The embodiment of the present application also provides a display device comprising the display substrate of any one of the above. The display substrate embodiment of the present embodiment comprises all the technical solutions in the display device embodiment, and thus can at least achieve all the technical effects described above, which will not be repeated here.

[0055] The above is the preferred embodiment of the present application. It should be pointed out that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should also be considered as the protection scope of the present application.

Claims

1. A display substrate, characterized by, The display substrate comprises a substrate and a plurality of pixel units arranged on the substrate, each of the pixel units comprises a plurality of sub-pixels, each of the sub-pixels comprises a pixel driving circuit and a light emitting unit, the substrate comprises a plurality of data lines arranged along a first direction and extending along a second direction, and the pixel driving circuit is electrically connected to the data line, wherein the light emitting color of the sub-pixel corresponding to the pixel driving circuit connected to each of the data lines is the same. The display substrate further comprises a plurality of driving circuit columns arranged along the first direction and extending along the second direction, each of the driving circuit columns comprises a plurality of pixel driving circuits, and the light emitting color of the sub-pixel corresponding to each of the pixel driving circuits in each of the driving circuit columns is the same. Each of the pixel units comprises at least one red sub-pixel, at least one blue sub-pixel and at least one green sub-pixel, the display substrate comprises a first light emitting unit column and a second light emitting unit column, in the first light emitting unit column, the light emitting units of the red sub-pixels and the light emitting units of the blue sub-pixels are arranged alternately, and the light emitting units in the second light emitting unit column are all green sub-pixel light emitting units. The orthogonal projection of the first light emitting unit column on the substrate overlaps the orthogonal projection of the first driving circuit column on the substrate, and the orthogonal projection of the first light emitting unit column on the substrate does not overlap the orthogonal projection of the second driving circuit column on the substrate, wherein the first driving circuit column is a driving circuit column corresponding to the green sub-pixel, and the second driving circuit column is a driving circuit column corresponding to the red sub-pixel or the blue sub-pixel. In the first direction, the first driving circuit column and the second driving circuit column are arranged alternately, and in the second driving circuit column, the driving circuit column corresponding to the red sub-pixel and the driving circuit column corresponding to the blue sub-pixel are arranged alternately. 2.The display substrate of claim 1, wherein, The first light emitting unit column and the second light emitting unit column are arranged along the first direction and extend along the second direction. 3.The display substrate of claim 2, wherein, In the first direction, the first light emitting unit column and the second light emitting unit column are arranged alternately. 4.The display substrate of claim 1, wherein, The pixel driving circuit in each of the driving circuit columns corresponds to the light emitting units in the light emitting unit columns on both sides of the driving circuit column. 5.The display substrate of any one of claims 1 to 4, wherein, The light emitting units of the red sub-pixels in the same first light emitting unit column correspond to the pixel driving circuits in the same driving circuit column. The light emitting units of the blue sub-pixels in the same first light emitting unit column correspond to the pixel driving circuits in the same driving circuit column. The light emitting units in the same second light emitting unit column correspond to the pixel driving circuits in different driving circuit columns respectively.

6. A display device, characterized by comprising: The display substrate comprises any one of claims 1 to 5.

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