Display panel and display device

Abstract

The invention provides a display panel and a display device, the display panel comprises a display area, a first side of the display area is provided with a driving circuit, the display area comprises a plurality of pixels arranged in an array, and the plurality of pixels comprise blue pixels, red pixels and green pixels. The direction between the first side and the opposite side of the first side serves as the column direction, the direction perpendicular to the column direction serves as the row direction, and in the column direction, away from the first side, in the display area, the blue pixels have the first structure change trend so that the blue pixels in the ith row can correspond to the first structure compensation current, the green pixel has a second structure change trend so that the green pixel in the ith row corresponds to a second structure compensation current, the red pixel has a third structure change trend so that the red pixel in the ith row corresponds to a third structure compensation current, and the first structure compensation current is greater than the second structure compensation current and greater than the third structure compensation current; the brightness attenuation difference of different color pixels is effectively relieved, and the chromaticity uniformity of the display panel is improved.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] The color uniformity of a display screen is an important indicator for determining the quality of the display screen. Current display panels have the problem of uneven display color and cannot meet actual display requirements. Summary of the invention

[0003] In view of this, an object of the present application is to provide a display panel and a display device to improve the chromaticity uniformity of the display panel.

[0004] An embodiment of the present application provides a display panel, including:

[0005] A display area, wherein a first side of the display area has a driving circuit, the display area includes a plurality of pixels arranged in an array, a direction between the first side and a side opposite to the first side is a column direction, and a direction perpendicular to the column direction is a row direction; the plurality of pixels include blue pixels, red pixels, and green pixels;

[0006] In the column direction away from the first side in the display area, the blue pixels have a first structural change trend so that the blue pixels in the i-th row correspond to a first structural compensation current, the green pixels have a second structural change trend so that the green pixels in the i-th row correspond to a second structural compensation current, and the red pixels have a third structural change trend so that the red pixels in the i-th row correspond to a third structural compensation current, and the first structural compensation current > the second structural compensation current > the third structural compensation current.

[0007] An embodiment of the present application provides a display device, comprising the display panel described in the above embodiment.

[0008] The embodiment of the present application provides a display panel and a display device, wherein the display panel includes a display area, a first side of the display area has a driving circuit, and the display area includes a plurality of pixels arranged in an array, wherein the plurality of pixels include blue pixels, red pixels, and green pixels. The direction between the first side and the opposite side of the first side is taken as the column direction, and the direction perpendicular to the column direction is taken as the row direction. In the column direction away from the first side in the display area, the brightness attenuation of the blue pixel is greater than that of the green pixel, and greater than that of the red pixel. Therefore, the blue pixel has a first structural change trend so that the blue pixel in the i-th row corresponds to the first structural compensation current, the green pixel has a second structural change trend so that the green pixel in the i-th row corresponds to the second structural compensation current, and the red pixel has a third structural change trend so that the red pixel in the i-th row corresponds to the third structural compensation current. The first structural compensation current is greater than the second structural compensation current and greater than the third structural compensation current, so that the current of the blue pixel is greatly improved, thereby greatly slowing down the brightness attenuation, the current of the green pixel is moderately improved, thereby moderately slowing down the brightness attenuation, and the current of the red pixel is slightly improved, thereby slowing down the brightness attenuation, which can effectively alleviate the brightness difference among the red pixel, the green pixel, and the blue pixel, and improve the chromaticity uniformity of the display panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0010] Figure 1 A schematic diagram of the yield distribution of a bare screen light-emitting unit at present;

[0011] Figure 2 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0012] Figure 3 A schematic diagram of brightness attenuation of a light-emitting unit in a display panel provided in an embodiment of the present application;

[0013] Figure 4 A structural diagram of another display panel provided in an embodiment of the present application;

[0014] Figure 5 This is a schematic diagram of pixel brightness attenuation provided in an embodiment of the present application;

[0015] Figure 6 This is a schematic diagram of the effect of pixel capacitance on brightness provided by an embodiment of the present application;

[0016] Figure 7 A schematic diagram of the structure of a driving transistor provided in an embodiment of the present application;

[0017] Figure 8 This is a schematic diagram of the effect of the width-to-length ratio on the current provided in an embodiment of the present application;

[0018] Fig. 9 A schematic diagram of the planar structure of a display device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below with reference to the accompanying drawings.

[0020] In the following description, many specific details are set forth to facilitate a full understanding of the present application, but the present application may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0021] Secondly, the present application is described in detail with reference to the schematic diagram. When describing the embodiments of the present application in detail, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present application. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0022] As mentioned in the background technology, the color uniformity of a display screen is an important indicator for determining the quality of the display screen. Current display panels have the problem of uneven display color and cannot meet actual display requirements. Figure 1 As shown in the figure, it is a schematic diagram of the yield distribution of a bare screen light unit (LU), where the horizontal axis is the yield and the vertical axis is the percentage corresponding to the yield. It can be seen from the figure that the display panels with a yield greater than 90% account for only 15%, which cannot meet actual needs.

[0023] After research, the inventors found that the driving circuit (integrated circuit, IC) is often set on one side of the display panel. The brightness of the light-emitting unit gradually decays from the near IC (the side close to the IC) to the far IC (the side far away from the IC), and the attenuation amplitude of light-emitting units of different colors is inconsistent.

[0024] refer to Figure 2 As shown, it is a structural schematic diagram of a display panel provided in an embodiment of the present application, wherein the driving circuit (black part) is arranged at the bottom of the display area (gray part) of the display panel, and the brightness of the light-emitting unit gradually decays in the direction from bottom to top.

[0025] refer to Figure 3 As shown, it is a schematic diagram of the brightness attenuation of the light-emitting unit in a display panel provided in an embodiment of the present application. The horizontal axis is the number of pixel rows in the direction from the near IC to the far IC, and the vertical axis is the percentage of brightness attenuation. It can be seen from the figure that the brightness of the red pixel decays slowly, the brightness of the green pixel decays second, and the brightness of the blue pixel decays the most, resulting in a deviation in the color of the synthesized light and uneven chromaticity of the display panel.

[0026] Based on this, an embodiment of the present application provides a display panel and a display device, wherein the display panel includes a display area, a first side of the display area has a driving circuit, the display area includes a plurality of pixels arranged in an array, and the plurality of pixels include blue pixels, red pixels and green pixels. The direction between the first side and the opposite side of the first side is taken as the column direction, and the direction perpendicular to the column direction is taken as the row direction. In the column direction away from the first side in the display area, the brightness attenuation of the blue pixel is greater than the brightness attenuation of the green pixel, which is greater than the brightness attenuation of the red pixel. Therefore, the blue pixel has a first structural change trend so that the blue pixel in the i-th row corresponds to the first structural compensation current, the green pixel has a second structural change trend so that the green pixel in the i-th row corresponds to the second structural compensation current, and the red pixel has a third structural change trend so that the red pixel in the i-th row corresponds to the third structural compensation current. The first structural compensation current is greater than the second structural compensation current and greater than the third structural compensation current, so that the current of the blue pixel is greatly improved, thereby slowing down the brightness attenuation to a great extent, the current of the green pixel is moderately improved, thereby slowing down the brightness attenuation to a moderate extent, and the current of the red pixel is slightly improved, thereby slowing down the brightness attenuation to a lesser extent. This can effectively alleviate the brightness difference among the red pixel, the green pixel and the blue pixel, and improve the chromaticity uniformity of the display panel.

[0027] In order to better understand the technical solution and technical effects of the present application, specific embodiments will be described in detail below with reference to the accompanying drawings.

[0028] refer to Figure 4 As shown, it is a structural diagram of another display panel provided in an embodiment of the present application, the display panel includes a display area (AA), a first side of the display area has a driving circuit, wherein the driving circuit can be arranged in a non-display area (NA) outside the display area, and the display area includes a plurality of pixels arranged in an array, and the plurality of pixels include blue (blue, B) pixels, red (red, R) pixels and green (green, G) pixels.

[0029] The direction between the first side and the opposite side of the first side is taken as the column direction (i.e. the longitudinal direction in the figure), and the direction perpendicular to the column direction is taken as the row direction (i.e. the lateral direction in the figure). In the column direction away from the first side in the display area (i.e. the upward direction), the blue pixel usually has a larger brightness attenuation, the green pixel usually has a medium brightness attenuation, and the red pixel usually has a smaller brightness attenuation, that is, the brightness attenuation of the blue pixel is greater than the brightness attenuation of the green pixel, which is greater than the brightness attenuation of the red pixel, resulting in a deviation in the color of the synthesized light and uneven color display of the display panel. This is because the pixel circuit wiring connected between the pixel and the driving circuit has a voltage drop, and the voltage drop of pixels of different colors is different, and the current size is different, resulting in different brightness attenuation of pixels of different colors.

[0030] In the embodiment of the present application, the number of pixel rows can be sorted in the column direction (i.e., the upward direction) away from the first side in the display area, and the larger the number of rows, the farther away from the driving circuit. The blue pixel is set to have a first structural change trend so that the blue pixel in the i-th row corresponds to the first structural compensation current, the green pixel has a second structural change trend so that the green pixel in the i-th row corresponds to the second structural compensation current, and the red pixel has a third structural change trend so that the red pixel in the i-th row corresponds to the third structural compensation current, wherein i is a positive integer, and it can be understood that as i increases, the pixel gradually moves away from the driving circuit. The first structural compensation current is greater than the second structural compensation current and greater than the third structural compensation current, so that the current of the blue pixel is greatly improved, thereby greatly slowing down the brightness attenuation, the current of the green pixel is moderately improved, thereby moderately slowing down the brightness attenuation, and the current of the red pixel is less improved, thereby slowing down the brightness attenuation, which can effectively alleviate the brightness difference between the red pixel, the green pixel and the blue pixel, and improve the chromaticity uniformity of the display panel.

[0031] Of course, in the column direction away from the first side in the display area, i becomes larger and larger, that is, the distance between the pixel and the driving circuit becomes farther and farther, and the first structure compensation current, the second structure compensation current and the third structure compensation current each show an increasing trend to slow down their respective brightness attenuation trends and alleviate the brightness difference between the near IC end and the far IC end.

[0032] As a current compensation method, the first structural change trend, the second structural change trend and the third structural change trend can all be that the pixel capacitance (Cst) gradually increases, thereby compensating for the voltage drop of the pixel, so that pixels of different colors decrease in equal proportions. The pixel capacitance is the capacitance between the pixel electrode (M1) and the common electrode (Mc). The larger the pixel capacitance, the larger the current of the corresponding pixel and the greater the brightness.

[0033] Specifically, the increase range of the pixel capacitance of the blue pixel in the first structural change trend can be set to be greater than the increase range of the pixel capacitance of the green pixel in the second structural change trend, and greater than the increase range of the pixel capacitance of the red pixel in the third structural change trend, so that the first pixel capacitance of the blue pixel in the i-th row> the second pixel capacitance of the green pixel in the i-th row> the third pixel capacitance of the red pixel in the i-th row. In this way, the first pixel capacitance of the blue pixel is greatly improved, and the current and brightness are also greatly improved; the second pixel capacitance of the green pixel is moderately improved, and the current and brightness are also moderately improved; the third pixel capacitance of the red pixel is slightly improved, and the current and brightness are also slightly improved.

[0034] Specifically, it can be achieved by increasing the facing area of ​​the pixel electrode and the common electrode, and / or reducing the thickness of the dielectric layer between the pixel electrode and the common electrode, that is, the first structural change trend, the second structural change trend and the third structural change trend can be specifically as follows: in the column direction away from the first side in the display area, the facing area of ​​the pixel electrode and the common electrode gradually increases, and / or the thickness of the dielectric layer between the pixel electrode and the common electrode gradually decreases. It is more difficult to change the thickness of the dielectric layer, and it is less difficult to change the facing area, thereby accurately controlling the pixel capacitance value.

[0035] In a specific implementation, in the column direction away from the first side in the display area, the brightness attenuation is fitted as a linear function, and accordingly, the distance between the pixel in the i-th row of multiple pixels and the first side edge of the display area is recorded as the pixel distance x, and the corresponding relationship between the first pixel capacitor C1 of the blue pixel, the second pixel capacitor C2 of the green pixel and the third pixel capacitor C3 of the red pixel in the i-th row and the pixel distance x is: C1 = k1*x + b1; C2 = k2*x + b2; C3 = k3*x + b3; k1, k2 and k3 are the first slope, the second slope and the third slope respectively; b1, b2 and b3 are the first constant, the second constant and the third constant respectively; the first slope> the second slope> the third slope. Thus, the pixel capacitance is set by using a linear function, so that the parameter change of the pixel capacitance generates a structural change current to achieve the aforementioned voltage drop compensation.

[0036] Among them, the range of the first slope is [0.16, 0.25], the range of the second slope is [0.05, 0.15], the range of the third slope is [0.01, 0.04], the range of the first constant is [11.9, 12.1], the range of the second constant is [12.2, 12.4], and the range of the third constant is (12.4, 12.6], so as to achieve a better voltage drop compensation effect. Different slopes and constants can be set for different pixel circuits and different light-emitting devices.

[0037] As an example, refer to Figure 5 As shown, it is a schematic diagram of pixel brightness attenuation provided by an embodiment of the present application, where the horizontal axis is the x value, the vertical axis is the brightness attenuation percentage, and lines of different colors correspond to pixels of different colors, wherein the attenuation formula of the red (R) pixel is y=-0.0012x+1.0005, the attenuation formula of the blue (B) pixel is y=-0.0112x+1.0245, and the attenuation formula of the green (G) pixel is y=-0.0069x+1.0063.

[0038] refer to Figure 6 As shown, it is a schematic diagram of the influence of a pixel capacitance on brightness provided in an embodiment of the present application, the horizontal axis is the pixel capacitance (Cst), the vertical axis is the percentage of brightness increase, and lines of different colors correspond to pixels of different colors. It can be seen from the figure that the influence of the pixel capacitance on pixels of different colors is almost the same, and the compensation formula of the pixel capacitance on the brightness can be expressed as y=0.0534*Cst-1.665.

[0039] For each pixel, the attenuation amount can be set equal to the compensation amount, that is, the attenuation percentage of the pixel is equal to the percentage of brightness increase caused by the pixel capacitance. Since the attenuation percentage and the increase percentage change in different directions, the two are actually opposite numbers. Therefore, for the red pixel, 0.0534*C3-1.665=0.0012x-1.0005 can be set, and the third pixel capacitance C3=0.0225x+12.4438 can be calculated, that is, k3 is set to 0.0225 and b3 is set to 12.4438; for the green pixel, 0.0534*Cst-1.665=0.0069x-1.0063 can be set, and it can be calculated To the second pixel capacitance C2 = 0.1292x + 12.3352, that is, set k2 to 0.1292 and b2 to 12.3352; for the blue pixel, 0.0534*Cst-1.665=0.0112x-1.0245 can be set, and the first pixel capacitance C1=0.2097x+11.9944 can be calculated, that is, set k1 to 0.2097 and b1 to 11.9944.

[0040] In the embodiment of the present application, each pixel in the plurality of pixels includes a light emitting device and a pixel circuit, the pixel circuit includes a driving transistor, the channel width of the driving transistor is used as the width of the driving transistor, the channel length of the driving transistor is used as the length of the driving transistor, and the reference Figure 7As shown, it is a schematic diagram of the structure of a driving transistor provided in an embodiment of the present application, wherein the channel layer 10 and the gate layer 20 are overlapped, and the area where the channel layer 10 overlaps with the gate layer 20 is used as a channel, and the channel width and the channel length are determined according to the size of the area where the channel layer and the gate layer overlap. Generally speaking, the channel length L is determined according to the width of the channel layer 10, and the channel width W is determined according to the width of the gate layer 20, and the ratio of the channel width W to the channel length L is taken as the aspect ratio W / L.

[0041] As an example, refer to Figure 8 As shown, it is a schematic diagram of the effect of the aspect ratio on the current provided by the embodiment of the present application, the horizontal axis is the aspect ratio W / L, the vertical axis is the current, and the lines of different colors correspond to pixels of different colors. It can be seen from the figure that the current of the green pixel increases as the aspect ratio increases, the current of the red pixel remains unchanged as the aspect ratio increases, and the current of the blue pixel decreases as the aspect ratio increases. The current IG of the green pixel is expressed as: IG = y = 1.6696x + 22.447, the current IB of the blue pixel is expressed as: IB = y = -11.93x + 128.45, and the current IR of the red pixel is y = 40.

[0042] As a current compensation method, the first structural change trend is that the width-to-length ratio of the driving transistor corresponding to the blue pixel gradually decreases, so that the current of the blue pixel gradually increases, and the second structural change trend is that the width-to-length ratio of the driving transistor corresponding to the green pixel gradually increases, so that the current of the blue pixel gradually increases, thereby making the first width-to-length ratio of the driving transistor corresponding to the blue pixel in the i-th row> the third width-to-length ratio of the driving transistor corresponding to the red pixel in the i-th row> the second width-to-length ratio of the driving transistor corresponding to the green pixel in the i-th row. Among them, the third structural change trend is that the width-to-length ratio of the driving transistor corresponding to the red pixel remains unchanged, and it can also have the same change trend as the blue pixel, or the same change trend as the green pixel. In this way, brightness compensation can be achieved through the width-to-length ratio of the driving transistor to reduce the color deviation caused by the voltage drop.

[0043] Specifically, the width-to-length ratio of the driving transistor can be changed by changing the channel length, that is, the first structural change trend is that the channel length GL of the driving transistor corresponding to the blue pixel gradually increases, so that the width-to-length ratio of the driving transistor corresponding to the blue pixel gradually decreases, and the current IG of the blue pixel gradually increases; the second structural change trend is that the channel length BL of the driving transistor corresponding to the green pixel gradually decreases, so that the width-to-length ratio of the driving transistor corresponding to the green pixel gradually increases, and the current IB of the green pixel gradually increases, thereby achieving brightness compensation with a smaller change difficulty.

[0044] In a specific implementation, in the column direction away from the first side in the display area, when the brightness attenuation is fitted to a linear function, the distance between the pixel in the i-th row of the plurality of pixels and the first side edge of the display area is recorded as the pixel distance x, and the first width-to-length ratio WL1 of the driving transistor corresponding to the blue pixel and the second width-to-length ratio WL2 of the driving transistor corresponding to the green pixel in the i-th row of pixels respectively correspond to the pixel distance x as follows: WL1=k4*x+b4; WL2=k5*x+b5; k4 and k5 are the fourth slope and the fifth slope respectively; b4 and b5 are the fourth constant and the fifth constant respectively; the fourth slope is less than 0, and the fifth slope is greater than 0. Thus, the width-to-length ratio of the driving transistor is set by using a linear function, so that the change of the width-to-length ratio generates a structural change current, so as to realize the aforementioned voltage drop compensation.

[0045] The fourth slope is in the range of [-0.25, -0.05], the fifth slope is in the range of [0.05, 0.25], the fourth constant is in the range of [10, 35], and the fifth constant is in the range of [-40, -10], so as to achieve a better voltage drop compensation effect. Different slopes and constants can be set for different pixel circuits and different light-emitting devices.

[0046] As an example, refer to Figure 5 As shown, the attenuation formula of the red (R) pixel is y=-0.0012x+1.0005, the attenuation formula of the blue (B) pixel is y=-0.0112x+1.0245, and the attenuation formula of the green (G) pixel is y=-0.0069x+1.0063. Figure 8 Convert the brightness change in to percentage, record the initial WL as 3 / 14, then the initial current value IB0 of the blue pixel is 125.8936, and the initial current value IG0 of the green pixel is 22.8048. Therefore, the brightness increase percentage corresponding to the width-to-length ratio of each pixel is: blue pixel IB / IB0=IB / 125.8936=(-11.93x+128.45) / 125.8936, green pixel IG / IG0=IG / 22.8048=(1.6696x+22.447) / 22.8048.

[0047] For each pixel, the attenuation amount can be set equal to the compensation amount, that is, the attenuation percentage of the pixel is equal to the brightness increase percentage caused by the pixel capacitance. Since the attenuation percentage and the increase percentage change in different directions, the two are actually opposite numbers. Therefore, for the blue pixel, IB / 125.8936=(-11.93x+128.45) / 125.8936=0.0112x-1.0245 can be set. The first width-to-length ratio WL1= -0.1183x+21.5924, that is, set k4 to -0.1183 and b4 to 21.5924; for green pixels, IG / 22.8048=(1.6696x+22.447) / 22.8048=0.0069x-1.0063 can be set, and the second width-to-length ratio WL2=0.0943x-27.194 can be calculated, that is, set k5 to 0.0943 and b5 to -27.194.

[0048] In the embodiment of the present application, the pixel capacitance of each pixel and the width-to-length ratio of the driving transistor may also be detected, and the detection method may include a microscope or SEM to monitor the first structure compensation current, the second structure compensation current and the third structure compensation current.

[0049] The embodiment of the present application provides a display panel, including a display area, a first side of the display area having a driving circuit, and the display area including a plurality of pixels arranged in an array, the plurality of pixels including blue pixels, red pixels and green pixels. The direction between the first side and the opposite side of the first side is taken as the column direction, and the direction perpendicular to the column direction is taken as the row direction. In the column direction away from the first side in the display area, the brightness attenuation of the blue pixel is greater than that of the green pixel, and greater than that of the red pixel. Therefore, the blue pixel has a first structural change trend so that the blue pixel in the i-th row corresponds to the first structural compensation current, the green pixel has a second structural change trend so that the green pixel in the i-th row corresponds to the second structural compensation current, and the red pixel has a third structural change trend so that the red pixel in the i-th row corresponds to the third structural compensation current. The first structural compensation current is greater than the second structural compensation current and greater than the third structural compensation current, so that the current of the blue pixel is greatly improved, thereby greatly slowing down the brightness attenuation, the current of the green pixel is moderately improved, thereby moderately slowing down the brightness attenuation, and the current of the red pixel is slightly improved, thereby slowing down the brightness attenuation, which can effectively alleviate the brightness difference among the red pixel, the green pixel and the blue pixel, and improve the chromaticity uniformity of the display panel.

[0050] An embodiment of the present application also provides a display device, comprising the display panel described in the above embodiment.

[0051] refer to Fig. 9, which is a schematic diagram of the planar structure of a display device provided in an embodiment of the present application. As can be seen from the figure, the display device 1000 includes a display panel 100, and the display panel 100 is the display panel 100 described in any of the above embodiments. The display device 1000 provided in the embodiment of the present application can be a display device with a display function such as a mobile phone, a computer, a television, a car display device, etc., and the embodiment of the present application does not make specific limitations. The display device 1000 provided in the embodiment of the present application has the beneficial effects of the display panel 100 provided in the embodiment of the present application. For details, please refer to the specific description of the display panel in the above embodiment, and the embodiment of the present application will not be repeated here.

[0052] The above is only a preferred implementation of the present application. Although the present application has been disclosed as a preferred embodiment, it is not intended to limit the present application. Any technician familiar with the art can use the above disclosed methods and technical contents to make many possible changes and modifications to the technical solution of the present application without departing from the scope of the technical solution of the present application, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present application without departing from the content of the technical solution of the present application still falls within the scope of protection of the technical solution of the present application.

Claims

1. A display panel, characterized in that: include: A display area, wherein a first side of the display area has a driving circuit, the display area includes a plurality of pixels arranged in an array, a direction between the first side and a side opposite to the first side is a column direction, and a direction perpendicular to the column direction is a row direction; the plurality of pixels include blue pixels, red pixels, and green pixels; In the column direction away from the first side in the display area, the blue pixels have a first structural change trend so that the blue pixels in the i-th row correspond to a first structural compensation current, the green pixels have a second structural change trend so that the green pixels in the i-th row correspond to a second structural compensation current, and the red pixels have a third structural change trend so that the red pixels in the i-th row correspond to a third structural compensation current, and the first structural compensation current > the second structural compensation current > the third structural compensation current.

2. The display panel according to claim 1, characterized in that: The first structural change trend, the second structural change trend and the third structural change trend are all that the pixel capacitance gradually increases, and in the column direction away from the first side in the display area, the increase amplitude of the pixel capacitance of the blue pixel is greater than the increase amplitude of the pixel capacitance of the green pixel and the increase amplitude of the pixel capacitance of the red pixel, so that the first pixel capacitance of the blue pixel in the i-th row is greater than the second pixel capacitance of the green pixel in the i-th row and the third pixel capacitance of the red pixel in the i-th row.

3. The display panel according to claim 2, characterized in that: The distance between the pixels in the i-th row of the plurality of pixels and the first side edge of the display area is recorded as pixel distance x, and the corresponding relationships between the first pixel capacitor C1 of the blue pixel, the second pixel capacitor C2 of the green pixel and the third pixel capacitor C3 of the red pixel and the pixel distance x are respectively: C1=k1*x+b1; C2=k2*x+b2; C3=k3*x+b3; The k1, k2 and k3 are respectively the first slope, the second slope and the third slope; the b1, b2 and b3 are respectively the first constant, the second constant and the third constant; the first slope>the second slope>the third slope.

4. The display panel according to claim 3, characterized in that: The range of the first slope is [0.16, 0.25], the range of the second slope is [0.05, 0.15], the range of the third slope is [0.01, 0.04], the range of the first constant is [11.9, 12.1], the range of the second constant is [12.2, 12.4], and the range of the third constant is (12.4, 12.6].

5. The display panel according to claim 2, characterized in that: The first structural change trend, the second structural change trend and the third structural change trend are specifically: the facing area of ​​the pixel electrode and the common electrode gradually increases, and / or the thickness of the dielectric layer between the pixel electrode and the common electrode gradually decreases.

6. The display panel according to claim 1, characterized in that: Each pixel of the plurality of pixels comprises a light emitting device and a pixel circuit, wherein the pixel circuit comprises a driving transistor; The first structural change trend is that the width-to-length ratio of the driving transistor corresponding to the blue pixel gradually decreases, and the second structural change trend is that the width-to-length ratio of the driving transistor corresponding to the green pixel gradually increases, so that the first width-to-length ratio of the driving transistor corresponding to the blue pixel in the i-th row is greater than the third width-to-length ratio of the driving transistor corresponding to the red pixel in the i-th row and the second width-to-length ratio of the driving transistor corresponding to the green pixel in the i-th row.

7. The display panel according to claim 6, characterized in that: The distance between the pixels in the i-th row of the plurality of pixels and the first side edge of the display area is recorded as the pixel distance x. In the pixels in the i-th row, the first width-to-length ratio WL1 of the driving transistor corresponding to the blue pixel and the second width-to-length ratio WL2 of the driving transistor corresponding to the green pixel respectively correspond to the pixel distance x as follows: WL1=k4*x+b4; WL2=k5*x+b5; The k4 and the k5 are respectively the fourth slope and the fifth slope; the b4 and the b5 are respectively the fourth constant and the fifth constant; the fourth slope is <0, and the fifth slope is >0.

8. The display panel according to claim 7, characterized in that: The range of the fourth slope is [-0.25, -0.05], the range of the fifth slope is [0.05, 0.25], the range of the fourth constant is [10, 35], and the range of the fifth constant is [-40, -10].

9. The display panel according to claim 6, characterized in that: The first structural change trend is that the channel length of the driving transistor corresponding to the blue pixel gradually increases, and the second structural change trend is that the channel length of the driving transistor corresponding to the green pixel gradually decreases.

10. The display panel according to any one of claims 1 to 9, characterized in that: In the column direction away from the first side in the display area, the first structure compensation current, the second structure compensation current and the third structure compensation current each show an increasing trend.

11. A display device, characterized in that: A display panel comprising any one of claims 1 to 10.

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