Display panel, display screen and electronic equipment

Abstract

The embodiment of the invention provides a display panel, a display screen and electronic equipment, and relates to the technical field of electronic equipment. The display panel comprises a display layer, the display layer comprises green sub-pixels, red sub-pixels and blue sub-pixels, the aperture ratio of the green sub-pixels is larger than that of the red sub-pixels, and the aperture ratio of the green sub-pixels is larger than that of the blue sub-pixels. In this way, the color cast phenomenon can be improved, and the display effect of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a display panel, a display screen, and an electronic device. Background Technology

[0002] Organic light-emitting diode (OLED) display panels have excellent characteristics such as high brightness, high efficiency, wide viewing angle and fast response speed, and are widely used in various electronic devices (such as mobile phones). However, after long-term use, in scenarios such as low brightness or low grayscale, the images displayed by OLED display panels will show color shift (such as greenish tint). Summary of the Invention

[0003] This application provides a display panel, a display screen, and an electronic device that can improve color distortion and enhance the display effect of the display panel.

[0004] The first aspect of this application provides a display panel, which includes a display layer. The display layer includes green sub-pixels, red sub-pixels, and blue sub-pixels. The aperture ratio of the green sub-pixels is greater than that of the red sub-pixels, and the aperture ratio of the green sub-pixels is greater than that of the blue sub-pixels.

[0005] By increasing the aperture ratio of the green sub-pixels, the light-emitting area of ​​the green sub-pixels is increased. When the current driving the green sub-pixels remains constant, the current density on the green sub-pixels decreases, thereby increasing the current resistance and pixel capacitance of the green sub-pixels. This increases the capacitance stability of the green sub-pixels and reduces the aging intensity of the green sub-pixels. Consequently, the capacitance change of the green sub-pixels before and after aging is reduced. The brightness ratio of the green, red, and blue sub-pixels is within the allowable range, improving the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0006] In one possible implementation, the ring width of the anode coverage area of ​​the green sub-pixel is greater than the ring width of the anode coverage area of ​​the red sub-pixel, and the ring width of the anode coverage area of ​​the green sub-pixel is greater than the ring width of the anode coverage area of ​​the blue sub-pixel. The anode coverage area is annular, and the anode coverage area is the area where the anode of the sub-pixel is covered by the pixel separation layer of the display panel.

[0007] This increases the area of ​​the anode coverage region of the green sub-pixel, increases the anode parasitic capacitance of the green sub-pixel, and improves the pixel capacitance of the green sub-pixel, thereby increasing the capacitance stability of the green sub-pixel. As a result, the capacitance change of the green sub-pixel before and after aging is further reduced, which can further improve the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0008] In one possible implementation, the display panel further includes a pixel separation layer comprising a first portion, a second portion, and a third portion. The first portion covers a portion of the anode surface of the green sub-pixel, the second portion covers a portion of the anode surface of the red sub-pixel, and the third portion covers a portion of the anode surface of the blue sub-pixel. The slope angle of the first portion is smaller than that of the second portion, and the slope angle of the third portion is also smaller than that of the first portion.

[0009] By reducing the slope angle of the first part of the anode surface covering the green sub-pixel, the anode parasitic capacitance of the green sub-pixel is increased, the pixel capacitance of the green sub-pixel is improved, and the capacitance stability of the green sub-pixel is increased. As a result, the capacitance change of the green sub-pixel before and after aging is further reduced, which can further improve the color shift (greenish) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0010] In one possible implementation, the display panel further includes a pixel separation layer, which includes a first annular portion, a second annular portion, and a third annular portion. The first annular portion surrounds the green sub-pixel, the second annular portion surrounds the red sub-pixel, and the third annular portion surrounds the blue sub-pixel. Along the thickness direction of the display panel, the maximum thickness of the first annular portion is less than the maximum thickness of the second annular portion, and the maximum thickness of the first annular portion is less than the maximum thickness of the third annular portion.

[0011] By reducing the maximum thickness of the first annular portion surrounding the green sub-pixel, the anode parasitic capacitance of the green sub-pixel is increased, thereby improving the pixel capacitance of the green sub-pixel. This increases the capacitance stability of the green sub-pixel, further reducing the capacitance change of the green sub-pixel before and after aging. This can further improve the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0012] In one possible implementation, the aperture ratio of the green subpixel is greater than or equal to 11%.

[0013] In one possible implementation, the aperture ratio of the green subpixel is less than or equal to 15%.

[0014] In one possible implementation, the aperture ratio of the green subpixel is greater than or equal to 12% and less than or equal to 14%.

[0015] In one possible implementation, the aperture ratio of the red subpixel is greater than or equal to 5%, and the aperture ratio of the red subpixel is less than or equal to 10%.

[0016] In one possible implementation, the aperture ratio of the blue sub-pixel is greater than or equal to 5%, and the aperture ratio of the blue sub-pixel is less than or equal to 10%.

[0017] A second aspect of this application provides a display panel including a display layer. The display layer includes green sub-pixels, red sub-pixels, and blue sub-pixels. The annular width of the anode coverage area of ​​the green sub-pixels is greater than the annular width of the anode coverage area of ​​the red sub-pixels, and the annular width of the anode coverage area of ​​the green sub-pixels is greater than the annular width of the anode coverage area of ​​the blue sub-pixels. The anode coverage area is annular and is the area where the anode of the sub-pixels is covered by the pixel separation layer of the display panel.

[0018] This increases the area of ​​the anode coverage region of the green sub-pixel, increases the anode parasitic capacitance of the green sub-pixel, and improves the pixel capacitance of the green sub-pixel, thereby increasing the capacitance stability of the green sub-pixel and reducing the capacitance change of the green sub-pixel before and after aging. This can improve the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0019] In one possible implementation, the display panel further includes a pixel separation layer comprising a first portion, a second portion, and a third portion. The first portion covers a portion of the anode surface of the green sub-pixel, the second portion covers a portion of the anode surface of the red sub-pixel, and the third portion covers a portion of the anode surface of the blue sub-pixel. The slope angle of the first portion is smaller than that of the second portion, and the slope angle of the third portion is also smaller than that of the first portion.

[0020] In one possible implementation, the display panel further includes a pixel separation layer, which includes a first annular portion, a second annular portion, and a third annular portion. The first annular portion surrounds the green sub-pixel, the second annular portion surrounds the red sub-pixel, and the third annular portion surrounds the blue sub-pixel. Along the thickness direction of the display panel, the maximum thickness of the first annular portion is less than the maximum thickness of the second annular portion, and the maximum thickness of the first annular portion is less than the maximum thickness of the third annular portion.

[0021] A third aspect of this application provides a display panel including a display layer and a pixel separation layer. The display layer includes green sub-pixels, red sub-pixels, and blue sub-pixels. The pixel separation layer includes a first portion, a second portion, and a third portion. The first portion covers a portion of the anode surface of the green sub-pixels, the second portion covers a portion of the anode surface of the red sub-pixels, and the third portion covers a portion of the anode surface of the blue sub-pixels. The slope angle of the first portion is smaller than the slope angle of the second portion, and the slope angle of the third portion is smaller than the slope angle of the third portion.

[0022] By reducing the slope angle of the first part of the anode surface covering the green sub-pixel, the anode parasitic capacitance of the green sub-pixel is increased, the pixel capacitance of the green sub-pixel is improved, and the capacitance stability of the green sub-pixel is increased. As a result, the capacitance change of the green sub-pixel before and after aging is reduced, which can improve the color shift (greenish) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0023] In one possible implementation, the display panel further includes a pixel separation layer, which includes a first annular portion, a second annular portion, and a third annular portion. The first annular portion surrounds the green sub-pixel, the second annular portion surrounds the red sub-pixel, and the third annular portion surrounds the blue sub-pixel. Along the thickness direction of the display panel, the maximum thickness of the first annular portion is less than the maximum thickness of the second annular portion, and the maximum thickness of the first annular portion is less than the maximum thickness of the third annular portion.

[0024] A fourth aspect of this application provides a display panel including a display layer and a pixel separation layer. The display layer includes green sub-pixels, red sub-pixels, and blue sub-pixels. The pixel separation layer includes a first annular portion, a second annular portion, and a third annular portion. The first annular portion surrounds the green sub-pixels, the second annular portion surrounds the red sub-pixels, and the third annular portion surrounds the blue sub-pixels. Along the thickness direction of the display panel, the maximum thickness of the first annular portion is less than the maximum thickness of the second annular portion, and the maximum thickness of both the first and third annular portions is less than the maximum thickness of the third annular portion.

[0025] By reducing the maximum thickness of the first annular portion surrounding the green sub-pixel, the anode parasitic capacitance of the green sub-pixel is increased, thereby improving the pixel capacitance of the green sub-pixel. This increases the capacitance stability of the green sub-pixel, thus reducing the capacitance change of the green sub-pixel before and after aging. This can improve the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0026] In one possible implementation, the ring width of the anode coverage area of ​​the green subpixel is greater than or equal to 3 μm.

[0027] In one possible implementation, the ring width of the anode coverage area of ​​the green subpixel is greater than or equal to 4 μm and less than or equal to 5 μm.

[0028] In one possible implementation, the ring width of the anode coverage area of ​​the red subpixel is greater than or equal to 2μm and less than 3μm.

[0029] In one possible implementation, the ring width of the anode coverage area of ​​the blue subpixel is greater than or equal to 2μm and less than 3μm.

[0030] In one possible implementation, the slope angle of the first part is less than or equal to 20°.

[0031] In one possible implementation, the slope angle of the first part is greater than or equal to 10°, and the slope angle of the first part is less than or equal to 15°.

[0032] In one possible implementation, the slope angle of the second part is greater than or equal to 25°, and the slope angle of the third part is greater than or equal to 25°.

[0033] In one possible implementation, the slope angle of the second part is less than or equal to 30°, and the slope angle of the third part is less than or equal to 30°.

[0034] In one possible implementation, the maximum thickness of the first annular portion is less than 1 μm.

[0035] In one possible implementation, the maximum thickness of the first annular portion is greater than or equal to 0.5 μm and less than or equal to 0.8 μm.

[0036] In one possible implementation, the maximum thickness of the second annular portion is greater than or equal to 1 μm and less than or equal to 1.5 μm.

[0037] In one possible implementation, the maximum thickness of the third annular portion is greater than or equal to 1 μm and less than or equal to 1.5 μm.

[0038] In one possible implementation, the green sub-pixel satisfies: C22 / C21≥1, where C21 is the anode parasitic capacitance of the green sub-pixel when the total usage time of the display panel is T1, and C22 is the anode parasitic capacitance of the green sub-pixel when the total usage time of the display panel is T2. T1 is less than T2, and the anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode of the sub-pixel and the pixel separation layer of the display panel along the thickness direction of the display panel.

[0039] C21 can be understood as the anode parasitic capacitance before the green sub-pixel ages, and C22 can be understood as the anode parasitic capacitance after the green sub-pixel ages. The anode parasitic capacitance before and after the green sub-pixel ages is the same or the anode parasitic capacitance after the green sub-pixel ages increases, which increases the pixel capacitance of the green sub-pixel, further increases the capacitance stability of the green sub-pixel, further reduces the capacitance change before and after the green sub-pixel ages, and further improves the color shift (greenish) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0040] In one possible implementation, the green sub-pixel satisfies: 1 < C22 / C21 < 1.2, which increases the anode parasitic capacitance of the green sub-pixel after aging, and can further improve the color shift (greenish) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0041] In one possible implementation, the green sub-pixel satisfies: C2 / C1 ≥ 0.5, where C1 is the device capacitance of the green sub-pixel when the total usage time of the display panel is T1, and C2 is the anode parasitic capacitance of the green sub-pixel when the total usage time of the display panel is T1. The device capacitance is the capacitance formed by the anode and cathode of the sub-pixel, and the anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode of the sub-pixel and the pixel separator layer of the display panel along the thickness direction of the display panel. This further increases the capacitance stability of the green sub-pixel, further reduces the capacitance change of the green sub-pixel before and after aging, and further improves the color shift (greenish tint) phenomenon of the display panel in low brightness or low grayscale scenarios.

[0042] In one possible implementation, the green subpixel satisfies: 0.5 ≤ C2 / C1 < 10.

[0043] A fifth aspect of this application provides a display screen, which includes a cover plate and a display panel as described in any one of the first to fourth aspects, wherein the cover plate is located on the display side of the display panel.

[0044] A sixth aspect of this application provides an electronic device, which includes a housing and a display screen as described in the fifth aspect, the display screen being connected to the housing. Attached Figure Description

[0045] Figure 1 A schematic diagram of an electronic device provided in an embodiment of this application;

[0046] Figure 2 This is a schematic diagram of the pixel arrangement of a display panel provided in an embodiment of this application;

[0047] Figure 3 for Figure 2 A cross-sectional view of the display panel shown.

[0048] Figure 4 for Figure 3 A cross-sectional schematic diagram showing the interaction between the pixel separation layer and the anode and light-emitting layer of the sub-pixel;

[0049] Figure 5 A cross-sectional schematic diagram illustrating the cooperation between a pixel separation layer and a display layer, as provided in an embodiment of this application;

[0050] Figure 6 for Figure 5 The diagram shows a cross-sectional view of the green sub-pixel in the display panel and its interaction with the pixel separator layer.

[0051] Explanation of reference numerals in the attached figures:

[0052] 100. Shell;

[0053] 200. Display screen;

[0054] 300. Cover plate;

[0055] 400. Display panel;

[0056] 10. Pixel separation layer; 11a. First opening; 11b. Second opening; 11c. Third opening; 12. First part; 13. Second part; 14. Third part; 15. First annular part; 16. Second annular part; 17. Third annular part;

[0057] 20. Display layer; 21. Sub-pixel; 211. Anode; 212. Emitting layer; 213. Cathode; 21a. Green sub-pixel; 21b. Red sub-pixel; 21c. Blue sub-pixel;

[0058] 30. Substrate; 40. Circuit layer; 41. Thin-film transistor; 50. Encapsulation layer;

[0059] S1, the luminescent area; S2, the anode-covered area. Detailed Implementation

[0060] This application provides an electronic device, which may include, but is not limited to, a mobile phone, tablet computer, laptop computer, ultra-mobile personal computer (UMPC), handheld computer, walkie-talkie, netbook, point of sale (POS) machine, personal digital assistant (PDA), wearable device, or any other device with a display screen 200. The following description uses a mobile phone as an example.

[0061] Figure 1 This is a schematic diagram of an electronic device provided in an embodiment of this application.

[0062] See Figure 1 As shown, the electronic device includes a housing 100 and a display screen 200, with the display screen 200 connected to the housing 100. The housing 100 may include a mid-frame and a back cover, with the back cover and the display screen 200 located on opposite sides of the mid-frame and connected to it respectively. The back cover and the mid-frame can form a cavity for accommodating a battery, a motherboard, and a camera module.

[0063] Figure 2 This is a schematic diagram of the pixel arrangement of a display panel provided in an embodiment of this application. Figure 3 for Figure 2 The diagram shows a cross-sectional view of the display panel. Figure 4 for Figure 3 A cross-sectional schematic diagram showing the interaction between the pixel separation layer and the anode and emitting layer of the sub-pixel.

[0064] See Figure 3 As shown, the display screen 200 includes a display panel 400 and a cover plate 300. The cover plate 300 is disposed on the display side of the display panel 400 and is used to protect the display panel 400. The cover plate 300 is made of a transparent material, such as glass.

[0065] Of course, in addition to the display panel 400 and the cover plate 300, the display screen 200 may also include structures such as an opaque ink layer (not shown in the figure), a polarizer (not shown in the figure), and a touch layer (not shown in the figure). The touch layer is used to enable the display screen 200 to have touch function. The opaque ink layer is used to cover the components within the bezel of the display screen 200 to improve the aesthetics of the display screen 200. The polarizer is used to filter light to improve the display effect of the display screen 200.

[0066] The specific type of display screen 200 is not limited here. In some embodiments, the display screen 200 can be an OLED (organic light-emitting diode) display screen, in which case the display panel 400 in the display screen 200 is an OLED display panel. In other embodiments, the display screen 200 can be a quantum dot light-emitting diode (QLED) display screen, in which case the display panel 400 in the display screen 200 is a QLED display panel. The following description uses an OLED display screen as an example.

[0067] See also Figure 3 As shown, the display panel 400 includes a backplane, a display layer 20, a pixel definition layer (PDL) 10, and an encapsulation layer 50. The display layer 20 includes multiple pixels arranged in an array, and each pixel includes a corresponding number of sub-pixels 21 according to the color scheme of the display panel 400. For example... Figure 2 As shown, when the display panel 400 adopts the red-green-blue (RGB) color scheme, each pixel includes three sub-pixels 21. The first sub-pixel 21 is the red sub-pixel 21b, the second sub-pixel 21 is the green sub-pixel 21a, and the third sub-pixel 21 is the blue sub-pixel 21c. The red sub-pixel 21b, the green sub-pixel 21a, and the blue sub-pixel 21c emit red, green, and blue light, respectively.

[0068] Of course, the display panel 400 can also use other color schemes. For example, the display panel 400 can also use red-green-blue-white (RGBW) arrangement, PenTile arrangement, Delta arrangement, diamond arrangement, and other color schemes. The following explanation will use the display panel 400 using RGB arrangement as an example.

[0069] like Figure 3 As shown, each sub-pixel 21 includes an anode 211, a light-emitting layer 212, and a cathode 213. The light-emitting layer 212 can emit light that is directly directed toward the cathode 213, and this part of the light is directly emitted from the cathode 213. In addition, the light-emitting layer 212 also emits light that is directed toward the anode 211. This part of the light is reflected by the anode 211 and then emitted from the cathode 213. Therefore, the light-emitting surface of the display layer 20 is the surface on the side of the cathode 213, and the light is emitted from the display layer 20 toward the encapsulation layer 50.

[0070] There are multiple anodes 211, with one anode 211 corresponding to each sub-pixel 21, and a gap between any two adjacent anodes 211. In addition, the cathode 213 of each sub-pixel 21 is part of the cathode 213 layer, that is, the cathodes 213 of any two sub-pixels 21 are a single structure.

[0071] like Figure 3 As shown, each sub-pixel 21 includes a light-emitting area S1 and an anode-covered area S2. The anode-covered area S2 surrounds the light-emitting area S1 and is annular. The anode-covered area S2 can also be referred to as the anode overlap area. Figure 3 As shown, the anode coverage area S2 is the area where the anode 211 of sub-pixel 21 is covered by the pixel separation layer 10.

[0072] like Figure 4As shown, the pixel separation layer 10 separates the anodes 211 of two adjacent sub-pixels 21. The pixel separation layer 10 includes multiple openings, including a first opening 11a, a second opening 11b, and a third opening 11c. The first opening 11a corresponds one-to-one with the green sub-pixel 21a, exposing the portion of the anode 211 of the green sub-pixel 21a facing the cathode 213. The second opening 11b corresponds one-to-one with the red sub-pixel 21b, exposing the portion of the anode 211 of the red sub-pixel 21b facing the cathode 213. The third opening 11c corresponds one-to-one with the blue sub-pixel 21c, exposing the portion of the anode 211 of the blue sub-pixel 21c facing the cathode 213. It can be seen that the opening corresponds one-to-one with the sub-pixel 21, and each opening exposes a part of the anode 211 of the corresponding sub-pixel 21. That is to say, a part of the surface of the anode 211 facing the cathode 213 along the thickness direction of the display panel 400 is covered by the pixel separation layer 10, and another part is exposed in the opening and in contact with the light-emitting layer 212.

[0073] like Figure 3 As shown, the backplane includes a substrate 30 and a circuit layer 40. The circuit layer 40 is located between the display layer 20 and the substrate 30, and between the pixel separation layer 10 and the substrate 30. The circuit layer 40 includes multiple thin film transistors 41 (TFTs) and multiple signal lines (not shown in the figure). The drains (not shown) of the thin film transistors 41 are electrically connected to the anodes 211 of the sub-pixels 21. The thin film transistors 41 are only shown in the figure with a top gate structure.

[0074] In this sub-pixel 21, the anode 211 receives a driving signal from the thin-film transistor 41, and the cathode 213 of the sub-pixel 21 receives a reference voltage signal (or cathode power signal) ELVSS. The light-emitting layer 212 emits light under the combined action of the driving signal and the reference voltage signal ELVSS. Multiple sub-pixels 21 cooperate with each other to enable the display panel 400 to display an image.

[0075] In some embodiments, the substrate 30 may be a rigid substrate 30. The material of the rigid substrate 30 may include, for example, glass, quartz, or plastic. In other embodiments, the substrate 30 may be a flexible substrate 30. The material of the flexible substrate 30 may include, for example, polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or PI (polyimide).

[0076] The encapsulation layer 50 is used to encapsulate and protect the sub-pixel 21 to isolate it from water and oxygen, thereby ensuring the lifespan of the sub-pixel 21. Exemplarily, the encapsulation layer 50 includes alternating stacked organic and inorganic encapsulation layers.

[0077] After prolonged use, the display panel 400 may exhibit color cast issues, such as a greenish tint, in low-brightness or low-grayscale scenarios. To address this greenish tint, the inventors of this embodiment carefully analyzed the situation and discovered that after prolonged use, the brightness of the red sub-pixel 21b, green sub-pixel 21a, and blue sub-pixel 21c changes to varying degrees in low-brightness or low-grayscale scenarios. Specifically, the brightness of the red sub-pixel 21b and green sub-pixel 21a increases, while the brightness of the blue sub-pixel 21c decreases, leading to an imbalance in the brightness ratio of red, green, and blue light. In this case, the proportion of green light is excessive, resulting in the greenish tint.

[0078] In-depth analysis revealed that one reason for the change in pixel brightness of sub-pixel 21 is that after prolonged aging under power, the organic material of the light-emitting layer 212 degrades, leading to an increase in interfacial defects and a decrease in the device capacitance of sub-pixel 21. This device capacitance is formed by the anode 211 and cathode 213 of sub-pixel 21. In low-brightness / grayscale images, most of the current received by sub-pixel 21 fills the device capacitance, with a relatively small proportion actually used for light emission. Therefore, when the device capacitance of green sub-pixel 21a decreases significantly, while the decreases of red and blue sub-pixels 21b and 21c are smaller, the proportion of current actually used to emit light from green sub-pixel 21a is larger, while the proportion used to emit light from red and blue sub-pixels 21b and 21c is smaller. This results in an excessively high proportion of green light emitted by green sub-pixel 21a, causing a greenish tint.

[0079] Therefore, it can be seen that after prolonged use, the capacitance of the green sub-pixel 21a decreases excessively, resulting in an increase in the proportion of current used for light emission in the green sub-pixel 21a, which in turn increases the brightness of green light and causes a greenish tint.

[0080] In view of this, this application provides a display panel 400, which increases the pixel capacitance of the green sub-pixel 21a and increases the capacitance stability of the green sub-pixel 21a, thereby reducing the capacitance change of the green sub-pixel 21a after long-term use. This reduces the proportion of current actually used to make the green sub-pixel 21a emit light, thereby reducing the brightness ratio of green light. As a result, the brightness ratio of red light, blue light and green light is within a reasonable range, improving the green tint phenomenon and enhancing the display effect of the display panel 400.

[0081] The pixel capacitance mainly includes the device capacitance and the anode parasitic capacitance. The pixel capacitance is equal to the sum of the device capacitance and the anode parasitic capacitance. The device capacitance is the capacitance formed by the anode 211 and the cathode 213 of the sub-pixel 21. Specifically, as shown... Figure 3As shown, the portions of anode 211 and cathode 213 located within the light-emitting region S1 form a device capacitor. Since the display panel 400 is an OLED display panel, the device capacitor can also be called an OLED capacitor. The anode parasitic capacitance is the capacitance between the anode 211 of the sub-pixel 21 and the pixel separation layer 10 along the thickness direction of the display panel 400 (e.g., ...). Figure 3 The parasitic capacitance formed by the overlapping region in the Z-direction, for example Figure 3 As shown, the anode 211 in the anode coverage area S2 forms an anode parasitic capacitance with the pixel separation layer 10.

[0082] The following specific embodiments illustrate how to improve the pixel capacitance of the green sub-pixel 21a.

[0083] Implementation 1

[0084] Combination Figure 2 and Figure 3 As can be seen, the display layer 20 includes multiple sub-pixels 21, which include green sub-pixels 21a, red sub-pixels 21b, and blue sub-pixels 21c. The aperture ratio of green sub-pixels 21a is greater than that of red sub-pixels 21b, and the aperture ratio of green sub-pixels 21a is greater than that of blue sub-pixels 21c. The aperture ratio is the ratio of the area of ​​the light-emitting region S1 of the sub-pixel 21 to the total area of ​​a single pixel. The total area of ​​a single pixel is calculated based on the pixel density of the display panel 400. Pixel density (PPI, pixels per inch) represents the number of pixels per inch. Methods for calculating the total area of ​​a single pixel based on pixel density can be found in existing technologies and will not be elaborated upon here.

[0085] The aperture ratio of the green sub-pixel 21a is greater than that of the red sub-pixel 21b and the blue sub-pixel 21c. This makes the area of ​​the light-emitting region S1 of the green sub-pixel 21a larger than that of the red sub-pixel 21b and the blue sub-pixel 21c. Consequently, the device capacitance of the green sub-pixel 21a is greater than that of the red sub-pixel 21b and the blue sub-pixel 21c. This reduces the proportion of current used to emit light from the green sub-pixel 21a, thereby reducing the brightness of the green light emitted by the green sub-pixel 21a. This brings the brightness ratio of red, blue, and green light within a reasonable range, improving the green tint phenomenon.

[0086] Therefore, by increasing the aperture ratio of the green sub-pixel 21a, the light-emitting area of ​​the green sub-pixel 21a is increased. When the current driving the green sub-pixel 21a remains constant, the current density on the green sub-pixel 21a decreases, thereby increasing the current resistance and pixel capacitance of the green sub-pixel 21a. The capacitance stability of the green sub-pixel 21a is increased, and the aging intensity of the green sub-pixel 21a is reduced. This reduces the capacitance change of the green sub-pixel 21a before and after aging, thus improving the color shift (greenish tint) phenomenon of the display panel 400 in low brightness or low grayscale scenarios.

[0087] For example, the aperture ratio of the green sub-pixel 21a can be greater than or equal to 11%, and the aperture ratio of the green sub-pixel 21a can be less than or equal to 15%. This can increase the area of ​​the light-emitting region S1 of the green sub-pixel 21a, thereby improving the color shift phenomenon and reducing the manufacturing difficulty and cost of the display panel 400. Of course, in some embodiments, the aperture ratio of the green sub-pixel 21a can also be greater than 15%.

[0088] In some embodiments, the aperture ratio of the green sub-pixel 21a is greater than or equal to 12% and less than or equal to 14%. This setting can significantly improve color cast and effectively balance the display effect and color cast of the display panel 400.

[0089] The specific value of the aperture ratio of the green sub-pixel 21a is not limited here. For example, the aperture ratio of the green sub-pixel 21a is 11%, 12%, 12.5%, 13%, 14%, 15%, 17%, 18.5%, 19%, etc.

[0090] There are no specific limitations on the aperture ratio of the red sub-pixel 21b. For example, the aperture ratio of the red sub-pixel 21b is greater than or equal to 5%, and less than or equal to 10%. The aperture ratio of the red sub-pixel 21b can be 5%, 5.5%, 6%, 7%, 7.5%, 9%, 9.5%, 10%, etc. It should be noted that the aperture ratio of the red sub-pixel 21b can also be less than 5% or greater than 10%.

[0091] There are no specific limitations on the aperture ratio of the blue sub-pixel 21c. For example, the aperture ratio of the blue sub-pixel 21c is greater than or equal to 5%, and less than or equal to 10%. The aperture ratio of the blue sub-pixel 21c can be 5%, 5.5%, 6%, 7%, 7.5%, 9%, 9.5%, 10%, etc. It should be noted that the aperture ratio of the blue sub-pixel 21c can also be less than 5% or greater than 10%.

[0092] The relationship between the aperture ratios of the red sub-pixel 21b and the blue sub-pixel 21c is not limited here. In some embodiments, the aperture ratios of the red sub-pixel 21b and the blue sub-pixel 21c are the same. In other embodiments, the aperture ratio of the red sub-pixel 21b is smaller than that of the blue sub-pixel 21c. In still other embodiments, the aperture ratio of the red sub-pixel 21b is larger than that of the blue sub-pixel 21c.

[0093] In some possible implementations, the green sub-pixel 21a satisfies: C22 / C21≥1, where C21 is the anode parasitic capacitance of the green sub-pixel 21a when the total usage time of the display panel 400 is T1, and C22 is the anode parasitic capacitance of the green sub-pixel 21a when the total usage time of the display panel 400 is T2. T1 is less than T2. ​​The anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode 211 of the sub-pixel 21 and the pixel separation layer 10 along the thickness direction of the display panel 400. The total usage time can be understood as the total cumulative usage time of the display panel 400 since the first power-on.

[0094] The difference between T1 and T2 can be understood as the aging time, and the specific value of the aging time is not restricted here. Therefore, C21 can be understood as the anode parasitic capacitance of the green sub-pixel 21a before aging, and C22 can be understood as the anode parasitic capacitance of the green sub-pixel 21a after aging. The anode parasitic capacitance of the green sub-pixel 21a before and after aging being the same, or the anode parasitic capacitance of the green sub-pixel 21a increasing after aging, ensures an increase in the pixel capacitance of the green sub-pixel 21a before and after aging, further increasing the capacitance stability of the green sub-pixel 21a, further reducing the amount of capacitance change before and after aging, and further improving the green tint phenomenon of the display panel 400 in low brightness or low grayscale scenarios.

[0095] The specific ratio of C22 / C21 is not limited here. For example, the green sub-pixel 21a satisfies: 1 < C22 / C21 < 1.2, which increases the anodic parasitic capacitance of the green sub-pixel 21a after aging. This improves the color cast and green tint phenomenon of the display panel 400 in low-brightness or low-grayscale scenarios, and reduces the manufacturing difficulty and cost of the green sub-pixel 21a. Of course, in some embodiments, the specific ratio of C22 / C21 can also be greater than or equal to 1.2.

[0096] The specific ratio of C22 / C21 can be 1.0, 1.03, 1.04, 1.05, 1.08, 1.09, 1.1, 1.105, 1.108, etc.

[0097] In some possible implementations, the green sub-pixel 21a satisfies: C2 / C1≥0.5, where C1 is the device capacitance of the green sub-pixel 21a when the total usage time of the display panel 400 is T1, and C2 is the anode parasitic capacitance of the green sub-pixel 21a when the total usage time of the display panel 400 is T1. The device capacitance is the capacitance formed by the anode 211 and cathode 213 of the sub-pixel 21, and the anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode 211 of the sub-pixel 21 and the pixel separation layer 10 of the display panel 400 along the thickness direction of the display panel 400.

[0098] C1 can be understood as the device capacitance of the green sub-pixel 21a before aging, and C2 can be understood as the anode parasitic capacitance of the green sub-pixel 21a before aging. Since the anode parasitic capacitance has good stability, the anode parasitic capacitance of the green sub-pixel 21a before aging is at least twice that of the device capacitance. This reduces the influence of the device capacitance on the pixel capacitance, further increasing the capacitance stability of the green sub-pixel 21a, thereby further reducing the capacitance change of the green sub-pixel 21a before and after aging, and further improving the green tint phenomenon.

[0099] The specific ratio of C2 / C1 is not limited here. For example, the green sub-pixel 21a satisfies: 0.5 ≤ C2 / C1 < 10, which can improve the capacitive stability of the green sub-pixel 21a and reduce its manufacturing difficulty and cost. Of course, in some embodiments, the ratio of C2 / C1 can also be greater than or equal to 10.

[0100] The ratio of C2 to C1 can be 0.5, 0.9, 1, 1.5, 2, 2.6, 3, 4, 5, 6, 7.9, 9, 10, 11, 15, etc.

[0101] Table 1 shows the capacitance change of the green sub-pixel 21a of the display panel 400 in this embodiment.

[0102]

[0103] Where Q = Q1 + Q2, the integral capacitor Q refers to the integral area of ​​the pixel capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q1 refers to the integral area of ​​the device capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q2 refers to the integral area of ​​the anode parasitic capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, and the device voltage is the voltage difference between the anode 211 and the cathode 213 of the sub-pixel 21.

[0104] As shown in Table 1, by increasing the aperture ratio of the green sub-pixel 21a, the change in the integral capacitance Q gradually decreases before and after aging. The main reason for the decrease is the slowdown in the increase of the device capacitance, while the decrease in the anode parasitic capacitance increases. The two capacitance change trends are coupled to achieve the result.

[0105] Example 2

[0106] Combination Figure 2 and Figure 3 As can be seen, the display layer 20 includes multiple sub-pixels 21, including green sub-pixels 21a, red sub-pixels 21b, and blue sub-pixels 21c. The annular width of the anode coverage area S2 of the green sub-pixel 21a is greater than that of the anode coverage area S2 of the red sub-pixel 21b, and the annular width of the anode coverage area S2 of the green sub-pixel 21a is greater than that of the anode coverage area S2 of the blue sub-pixel 21c. The anode coverage area S2 is annular, and it is the area of ​​the anode 211 of the sub-pixel 21 covered by the pixel separation layer 10. Thus, the area of ​​the anode coverage area S2 of the green sub-pixel 21a is larger than that of the anode coverage areas S2 of the red sub-pixels 21b and the blue sub-pixels 21c, which increases the anode parasitic capacitance of the green sub-pixel 21a. It should be noted that the annular width of the anode coverage area S2 is the distance between the outer ring and the inner ring. Since the specific shape of the light-emitting area of ​​sub-pixel 21 is not limited—that is, the light-emitting area S1 of sub-pixel 21 can be circular, rectangular, or polygonal, etc.—the shape of the anode coverage area S2 of sub-pixel 21 can also be a ring with different contours, such as a circular ring, a rectangular ring, or a polygonal ring. The ring width of the anode coverage area S2 of sub-pixel 21 can be different at different positions of the ring.

[0107] Therefore, by increasing the anode coverage area S2 of the green sub-pixel 21a, the anode parasitic capacitance of the green sub-pixel 21a is increased, thereby improving the pixel capacitance of the green sub-pixel 21a and increasing the capacitance stability of the green sub-pixel 21a. As a result, the capacitance change of the green sub-pixel 21a before and after aging is reduced, which can improve the color cast (green cast) phenomenon.

[0108] For example, the annular width of the anode coverage area S2 of the green sub-pixel 21a is greater than or equal to 3 μm and less than or equal to 5 μm, which can increase the area of ​​the light-emitting area S1 of the green sub-pixel 21a, thereby improving the color shift phenomenon and reducing the manufacturing difficulty and cost of the display panel 400. Of course, in some embodiments, the annular width of the anode coverage area S2 of the green sub-pixel 21a may also be greater than 5 μm.

[0109] In some embodiments, the ring width of the anode coverage area S2 of the green sub-pixel 21a can be greater than or equal to 4 μm and less than or equal to 5 μm, which can better improve the color cast phenomenon.

[0110] The specific value of the ring width of the anode coverage area S2 of the green sub-pixel 21a is not limited here. The ring width of the anode coverage area S2 of the green sub-pixel 21a can be 3μm, 3.5μm, 4μm, 5μm, 6μm, etc.

[0111] The specific value of the ring width of the anode coverage area S2 of the red sub-pixel 21b is not specifically limited here. For example, the ring width of the anode coverage area S2 of the red sub-pixel 21b is greater than or equal to 2μm and less than 3μm.

[0112] The specific value of the ring width of the anode coverage area S2 of the blue sub-pixel 21c is not specifically limited here. For example, the ring width of the anode coverage area S2 of the blue sub-pixel 21c is greater than or equal to 2μm and less than 3μm.

[0113] In some embodiments, the ratio of C22 / C21 of the green sub-pixel 21a can be limited to further improve the color cast. The description of the C22 / C21 ratio has been detailed in Embodiment 1, and therefore will not be repeated here.

[0114] In some embodiments, the C2 / C1 ratio of the green sub-pixel 21a can be limited to further improve the color cast. The description of the C2 / C1 ratio has been detailed in Embodiment 1, which will not be repeated here.

[0115] Table 2 shows the capacitance change of the green sub-pixel 21a of the display panel 400 in this embodiment 2.

[0116]

[0117] Where Q = Q1 + Q2, the integral capacitor Q refers to the integral area of ​​the pixel capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q1 refers to the integral area of ​​the device capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q2 refers to the integral area of ​​the anode parasitic capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, and the device voltage is the voltage difference between the anode 211 and the cathode 213 of the sub-pixel 21.

[0118] As shown in Table 2, by increasing the area of ​​the anode coverage region S2 of the green sub-pixel 21a, the change in the integral capacitance Q gradually decreases before and after aging. The main source of the decrease is the increased reduction in the anode parasitic capacitance.

[0119] Example 3

[0120] Combination Figure 2 and Figure 3 It is known that the display layer 20 includes multiple sub-pixels 21, including green sub-pixels 21a, red sub-pixels 21b, and blue sub-pixels 21c. The aperture ratio of green sub-pixels 21a is greater than that of red sub-pixels 21b, and the aperture ratio of green sub-pixels 21a is greater than that of blue sub-pixels 21c. The annular width of the anode coverage area S2 of green sub-pixels 21a is greater than that of the anode coverage area S2 of red sub-pixels 21b, and the annular width of the anode coverage area S2 of green sub-pixels 21a is greater than that of the anode coverage area S2 of blue sub-pixels 21c. Therefore, the difference between Embodiment 3 and Embodiments 1 and 2 is that while increasing the aperture ratio of green sub-pixels 21a, the area of ​​the anode coverage area S2 of green sub-pixels 21a is also increased, which also reduces the capacitance change of green sub-pixels 21a before and after aging, thus improving the green tint phenomenon.

[0121] The aperture ratios of the green sub-pixel 21a, red sub-pixel 21b, and blue sub-pixel 21c have been detailed in Embodiment 1; please refer to Embodiment 1 for details. Therefore, they will not be repeated here. Furthermore, the annular width of the anode coverage area S2 of the green sub-pixel 21a, red sub-pixel 21b, and blue sub-pixel 21c has been detailed in Embodiment 2; therefore, they will not be repeated here. Please refer to Embodiment 2 for details.

[0122] In some embodiments, the ratio of C22 / C21 of the green sub-pixel 21a can be limited to further improve the color cast. The description of the C22 / C21 ratio has been detailed in Embodiment 1, and therefore will not be repeated here.

[0123] In some embodiments, the C2 / C1 ratio of the green sub-pixel 21a can be limited to further improve the color cast. The description of the C2 / C1 ratio has been detailed in Embodiment 1, which will not be repeated here.

[0124] Table 3 shows the capacitance change of the green sub-pixel 21a of the display panel 400 in this embodiment 3.

[0125]

[0126]

[0127] Where Q = Q1 + Q2, the integral capacitor Q refers to the integral area of ​​the pixel capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q1 refers to the integral area of ​​the device capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q2 refers to the integral area of ​​the anode parasitic capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, and the device voltage is the voltage difference between the anode 211 and the cathode 213 of the sub-pixel 21.

[0128] As shown in Table 3, by increasing the area of ​​the anode coverage region S2 of the green sub-pixel 21a, the change in the integral capacitance Q gradually decreases before and after aging. The main reason for the decrease is the slowdown in the increase of device capacitance, while the decrease in anode parasitic capacitance increases. The two capacitance change trends are coupled to achieve the result.

[0129] Example 4

[0130] Figure 5 This is a cross-sectional schematic diagram illustrating another possible interaction between a pixel-separating layer and a display layer, as provided in an embodiment of this application. Figure 6 for Figure 5 The diagram shows a cross-sectional view of the green sub-pixel in the display panel and its interaction with the pixel separator layer.

[0131] like Figure 5 As shown, the display panel 400 includes a pixel separation layer 10 and a display layer 20. The display layer 20 includes a plurality of sub-pixels 21, which include a red sub-pixel 21b, a green sub-pixel 21a, and a blue sub-pixel 21c. Each sub-pixel 21 includes an anode 211, a light-emitting layer 212, and a cathode 213.

[0132] like Figure 5 As shown, the pixel separation layer 10 includes a first portion 12, a second portion 13, and a third portion 14. The first portion 12 covers a portion of the surface of the anode 211 of the green sub-pixel 21a (e.g., ...). Figure 6 As shown), the first part 12 has a first opening 11a, exposing a portion of the surface of the anode 211 of the green sub-pixel 21a, such that the light-emitting layer 212 of the green sub-pixel 21a contacts the anode 211. The second part 13 covers a portion of the surface of the anode 211 of the red sub-pixel 21b, and has a second opening 11b, exposing a portion of the surface of the anode 211 of the red sub-pixel 21b, such that the light-emitting layer 212 of the red sub-pixel 21b contacts the anode 211. The third part 14 covers a portion of the surface of the anode 211 of the blue sub-pixel 21c, and has a third opening 11c, exposing a portion of the surface of the anode 211 of the blue sub-pixel 21c, such that the light-emitting layer 212 of the blue sub-pixel 21c contacts the anode 211. The slope angle of the first part 12 (e.g., Figure 6 The slope angle shown in P is less than that in Part 2, Section 13 (as shown in P). Figure 6 As shown in Figure O), the slope angle of the first part 12 is smaller than the slope angle of the third part 14 (as shown in Figure O). Figure 6 (As shown in K). The slope angle can also be called the taper angle.

[0133] The slope angle of the first part 12 is smaller than that of the second part 13 and the slope angle of the second part 13, along the thickness direction of the display panel 400 (e.g., Figure 5 In the Z-direction, the maximum thickness of the first part 12 is less than the maximum thickness of the second part 13 and the third part 14, which makes the anode parasitic capacitance of the green sub-pixel 21a greater than that of the red sub-pixel 21b and the blue sub-pixel 21c. As a result, the pixel capacitance of the green sub-pixel 21a is greater than that of the blue sub-pixel 21c and the red sub-pixel 21b, and thus the capacitance stability of the green sub-pixel 21a is higher than that of the red sub-pixel 21b and the blue sub-pixel 21c.

[0134] Therefore, the capacitance change of the green sub-pixel 21a before and after aging is reduced, the proportion of the driving current used to make the green sub-pixel 21a emit light is reduced, the brightness of the green light emitted by the green sub-pixel 21a is reduced, and the brightness ratio of red, blue and red light is within a reasonable range, which can improve the color cast (green cast) phenomenon.

[0135] For example, the slope angle of the first part 12 is less than or equal to 20°. Of course, the slope angle of the first part 12 can also be greater than 20°, for example, the slope angle of the first part 12 can also be 22°.

[0136] In some embodiments, the slope angle of the first portion 12 is greater than or equal to 10° and less than or equal to 15°. Thus, the slope angle of the first portion 12 is between 10° and 15°, which can further improve color cast and reduce the manufacturing difficulty of the display panel 400. Of course, in other embodiments, the slope angle of the first portion 12 may also be between 15° and 20°, or the slope angle of the first portion 12 may be less than 10°.

[0137] There are no restrictions on the specific value of the slope angle in the first part 12. For example, the slope angle of the first part 12 can be 5°, 8°, 9°, 10°, 12°, 15°, 17°, 18°, 19°, 20°, etc.

[0138] There are no restrictions on the slope angle of the second part 13. For example, the slope angle of the second part 13 is greater than or equal to 25°, and the slope angle of the third part 14 is less than or equal to 30°. Of course, the slope angle of the second part 13 can also be greater than 30°. Limiting the slope angle of the second part 13 to between 25° and 30° helps to reduce the manufacturing difficulty of the pixel separation layer 10.

[0139] There are no restrictions on the slope angle of the third portion 14. For example, the slope angle of the third portion 14 is greater than or equal to 25° and less than or equal to 30°. Of course, the slope angle of the third portion 14 can also be greater than 30°. Limiting the slope angle of the third portion 14 to between 25° and 30° helps to reduce the manufacturing difficulty of the pixel separation layer 10.

[0140] To further reduce the brightness of green light, some possible implementations include, for example... Figure 5 As shown, the pixel separation layer 10 includes a first annular portion 15, a second annular portion 16, and a third annular portion 17. The first annular portion 15 surrounds the green sub-pixel 21a, the second annular portion 16 surrounds the red sub-pixel 21b, and the third annular portion 17 surrounds the blue sub-pixel 21c. Along the thickness direction of the display panel 400, the maximum thickness of the first annular portion 15 is less than the maximum thickness of the second annular portion 16, and the maximum thickness of the first annular portion 15 is less than the maximum thickness of the third annular portion 17.

[0141] Among them, such as Figure 5 As shown, the first annular portion 15 includes a first portion 12, the second annular portion 16 includes a second portion 13, and the third annular portion 17 includes a third portion 14. A portion of the pixel separation layer 10 between two adjacent anodes 211 includes any two of the first annular portion 15, the second annular portion 16, and the third annular portion 17, as well as the intermediate portion between these two portions. For example... Figure 5 As shown, the pixel separation layer 10 between the anode 211 of the green sub-pixel 21a and the anode 211 of the red sub-pixel 21b includes a first annular portion 15, a second annular portion 16, and an intermediate portion located between the first annular portion 15 and the second annular portion 16.

[0142] The maximum thickness of the first annular portion 15 is less than the maximum thickness of the second annular portion 16 and the third annular portion 17, which makes the anode parasitic capacitance of the green sub-pixel 21a greater than that of the red sub-pixel 21b and the blue sub-pixel 21c. As a result, the pixel capacitance of the green sub-pixel 21a is greater than that of the blue sub-pixel 21c and the red sub-pixel 21b. Consequently, the capacitance stability of the green sub-pixel 21a is higher than that of the red sub-pixel 21b and the blue sub-pixel 21c. Therefore, the decrease in the pixel capacitance of the aged green sub-pixel 21a is reduced, the proportion of the driving current actually used to make the green sub-pixel 21a emit light is reduced, the brightness of the green light emitted by the green sub-pixel 21a is reduced, the brightness ratio of green light is reduced, and the brightness ratio of red, blue and red light is within a reasonable range, which can improve the color cast (greenish) phenomenon.

[0143] Therefore, by reducing the maximum thickness of the first annular portion 15, making the maximum thickness of the first annular portion 15 smaller than the maximum thickness of the second annular portion 16 and the third annular portion 17, the anode parasitic capacitance of the green sub-pixel 21a can be increased, the capacitance stability of the green sub-pixel 21a can be improved, and the capacitance change of the green sub-pixel 21a before and after aging can be reduced, thereby achieving the purpose of improving the color shift (greenish shift) phenomenon of the display panel 400 in low brightness or low grayscale scenarios.

[0144] For example, the maximum thickness of the first annular portion 15 is less than 1 μm. Of course, in some embodiments, the maximum thickness of the first annular portion 15 may also be greater than or equal to 1 μm. In this case, the maximum thickness of the first annular portion 15 should be less than the maximum thickness of the second annular portion 16 and the third annular portion 17.

[0145] In some embodiments, the maximum thickness of the first annular portion 15 is greater than or equal to 0.5 μm and less than or equal to 0.8 μm, which can further improve the color cast phenomenon and reduce the manufacturing difficulty of the pixel separation layer 10.

[0146] The specific value of the maximum thickness of the first annular portion 15 is not limited here. For example, the maximum thickness of the first annular portion 15 can be 0.5μm, 0.55μm, 0.6μm, 0.65μm, 0.7μm, 0.75μm, etc.

[0147] The specific value of the maximum thickness of the second annular portion 16 is not limited here. For example, the maximum thickness of the second annular portion 16 is greater than or equal to 1 μm and less than or equal to 1.5 μm. For example, the maximum thickness of the second annular portion 16 can be 1 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, etc.

[0148] The specific value of the maximum thickness of the third annular portion 17 is not limited here. For example, the maximum thickness of the third annular portion 17 is greater than or equal to 1 μm and less than or equal to 1.5 μm. For example, the maximum thickness of the third annular portion 17 can be 1 μm, 1.1 μm, 1.2 μm, 1.3 μm, 1.4 μm, etc.

[0149] In some possible implementations, this embodiment may also limit the C22 / C21 ratio of the green sub-pixel 21a to further improve the color cast phenomenon. The description of the C22 / C21 ratio has been detailed in Embodiment 1, please refer to Embodiment 1, and therefore will not be repeated here.

[0150] In some possible implementations, this embodiment may also limit the C2 / C1 ratio of the green sub-pixel 21a to further improve the color cast phenomenon. The description of the C2 / C1 ratio has been detailed in Embodiment 1, please refer to Embodiment 1, and therefore will not be repeated here.

[0151] In some possible implementations, this embodiment may also make the aperture ratio of the green sub-pixel 21a greater than that of the red sub-pixel 21b and the blue sub-pixel 21c to further improve the color cast phenomenon. The relevant descriptions of the aperture ratios of the green sub-pixel 21a, red sub-pixel 21b and blue sub-pixel 21c have been detailed in Embodiment 1, please refer to Embodiment 2, and therefore will not be repeated here.

[0152] In some possible implementations, this embodiment may also make the annular width of the anode coverage area S2 of the green sub-pixel 21a larger than the annular width of the anode coverage area S2 of the red sub-pixel 21b and the blue sub-pixel 21c, in order to further improve the color cast phenomenon. The relevant descriptions of the annular widths of the anode coverage areas S2 of the green sub-pixel 21a, red sub-pixel 21b, and blue sub-pixel 21c have already been detailed in Embodiment Two; please refer to Embodiment Two for details, and therefore will not be repeated here.

[0153] Table 4 shows the capacitance change of the green sub-pixel 21a of the display panel 400 in this embodiment four.

[0154]

[0155]

[0156] Where Q = Q1 + Q2, the integral capacitor Q refers to the integral area of ​​the pixel capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q1 refers to the integral area of ​​the device capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, the integral capacitor Q2 refers to the integral area of ​​the anode parasitic capacitance of the green sub-pixel 21a and the device voltage of the green sub-pixel 21a, and the device voltage is the voltage difference between the anode 211 and the cathode 213 of the sub-pixel 21.

[0157] As shown in Table 4, by increasing the slope angle of the first part 12 corresponding to the green sub-pixel 21a and the maximum thickness of the first annular part 15, the change in the integral capacitor Q before and after aging gradually decreases. The main reason for the decrease is the increased reduction in the anode parasitic capacitance.

[0158] It should be noted that the above four embodiments illustrate the following methods to improve the green tint phenomenon: The first method is to increase the aperture ratio of the green sub-pixel 21a compared to the aperture ratios of the red sub-pixel 21b and the blue sub-pixel 21c. The second method is to increase the ring width of the anode coverage area S2 of the green sub-pixel 21a compared to the ring width of the anode coverage area S2 of the red sub-pixel 21b and the blue sub-pixel 21c. The third method is to decrease the slope angle of the first portion 12 in the pixel separation layer 10 compared to the slope angles of the second portion 13 and the third portion 14. The fourth method is to decrease the maximum thickness of the first annular portion 15 in the pixel separation layer 10 compared to the maximum thickness of the second annular portion 16 and the third annular portion 17.

[0159] To improve the greenish tint, one of the four methods described above can be used, such as Embodiment 1 and Embodiment 2. Alternatively, at least two of the four methods can be used, such as Embodiment 3 and Embodiment 4. Therefore, the four methods can be freely combined, and the embodiments for solving the color cast problem are not limited to the four embodiments described above. Of course, the more methods used, the better the effect of improving the color cast problem.

[0160] Furthermore, in any embodiment obtained by freely combining the above four methods, the ratio of C22 / C21 of the green sub-pixel 21a and / or the ratio of C2 / C1 of the green sub-pixel 21a can be limited to further improve the color cast phenomenon.

[0161] It should be noted that the embodiments in this application describe the color cast as a greenish tint. However, when the color cast is a reddish or bluish tint, based on the same solution approach, the green sub-pixel 21a in the above four methods can be replaced with a red sub-pixel 21b or a blue sub-pixel 21c to reduce the brightness of red or blue light, so that the brightness ratio of red, blue, and green light is within a reasonable range, thereby improving the reddish or bluish tint.

[0162] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0163] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0164] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the present application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0165] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0166] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0167] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A display panel (400), characterized in that, The display layer (20) includes a green sub-pixel (21a), a red sub-pixel (21b), and a blue sub-pixel (21c). The aperture ratio of the green sub-pixel (21a) is greater than that of the red sub-pixel (21b), and the aperture ratio of the green sub-pixel (21a) is greater than that of the blue sub-pixel (21c).

2. The display panel (400) according to claim 1, characterized in that, The annular width of the anode coverage area (S2) of the green sub-pixel (21a) is greater than the annular width of the anode coverage area (S2) of the red sub-pixel (21b), and the annular width of the anode coverage area (S2) of the green sub-pixel (21a) is greater than the annular width of the anode coverage area (S2) of the blue sub-pixel (21c). The anode coverage area (S2) is annular, and the anode coverage area (S2) is the area where the anode (211) of the sub-pixel (21) is covered by the pixel separation layer (10) of the display panel (400).

3. The display panel (400) according to claim 1 or 2, characterized in that, The display panel (400) further includes a pixel separation layer (10), which includes a first part (12), a second part (13) and a third part (14). The first part (12) covers a portion of the surface of the anode (211) of the green sub-pixel (21a), the second part (13) covers a portion of the surface of the anode (211) of the red sub-pixel (21b), and the third part (14) covers a portion of the surface of the anode (211) of the blue sub-pixel (21c). The slope angle of the first part (12) is smaller than that of the second part (13), and the slope angle of the first part (12) is smaller than that of the third part (14).

4. The display panel (400) according to any one of claims 1 to 3, characterized in that, The display panel (400) further includes a pixel separation layer (10), which includes a first annular portion (15), a second annular portion (16), and a third annular portion (17). The first annular portion (15) surrounds the green sub-pixel (21a), the second annular portion (16) surrounds the red sub-pixel (21b), and the third annular portion (17) surrounds the blue sub-pixel (21c). Along the thickness direction of the display panel (400), the maximum thickness of the first annular portion (15) is less than the maximum thickness of the second annular portion (16), and the maximum thickness of the first annular portion (15) is less than the maximum thickness of the third annular portion (17).

5. The display panel (400) according to any one of claims 1 to 4, characterized in that, The aperture ratio of the green sub-pixel (21a) is greater than or equal to 11%.

6. The display panel (400) according to claim 5, characterized in that, The aperture ratio of the green sub-pixel (21a) is less than or equal to 15%.

7. The display panel (400) according to claim 6, characterized in that, The aperture ratio of the green sub-pixel (21a) is greater than or equal to 12% and less than or equal to 14%.

8. The display panel (400) according to any one of claims 1 to 7, characterized in that, The aperture ratio of the red sub-pixel (21b) is greater than or equal to 5%, and the aperture ratio of the red sub-pixel (21b) is less than or equal to 10%.

9. The display panel (400) according to any one of claims 1 to 8, characterized in that, The aperture ratio of the blue sub-pixel (21c) is greater than or equal to 5%, and the aperture ratio of the blue sub-pixel (21c) is less than or equal to 10%.

10. A display panel (400), characterized in that, The display layer (20) includes a green sub-pixel (21a), a red sub-pixel (21b), and a blue sub-pixel (21c). The annular width of the anode coverage area (S2) of the green sub-pixel (21a) is greater than that of the anode coverage area (S2) of the red sub-pixel (21b), and the annular width of the anode coverage area (S2) of the green sub-pixel (21a) is greater than that of the anode coverage area (S2) of the blue sub-pixel (21c). The anode coverage area (S2) is annular and is the area where the anode (211) of the sub-pixel (21) is covered by the pixel separation layer (10) of the display panel (400).

11. The display panel (400) according to claim 10, characterized in that, The display panel (400) further includes a pixel separation layer (10), which includes a first part (12), a second part (13) and a third part (14). The first part (12) covers a portion of the surface of the anode (211) of the green sub-pixel (21a), the second part (13) covers a portion of the surface of the anode (211) of the red sub-pixel (21b), and the third part (14) covers a portion of the surface of the anode (211) of the blue sub-pixel (21c). The slope angle of the first part (12) is smaller than that of the second part (13), and the slope angle of the first part (12) is smaller than that of the third part (14).

12. The display panel (400) according to claim 10 or 11, characterized in that, The display panel (400) further includes a pixel separation layer (10), which includes a first annular portion (15), a second annular portion (16), and a third annular portion (17). The first annular portion (15) surrounds the green sub-pixel (21a), the second annular portion (16) surrounds the red sub-pixel (21b), and the third annular portion (17) surrounds the blue sub-pixel (21c). Along the thickness direction of the display panel (400), the maximum thickness of the first annular portion (15) is less than the maximum thickness of the second annular portion (16), and the maximum thickness of the first annular portion (15) is less than the maximum thickness of the third annular portion (17).

13. A display panel (400), characterized in that, It includes a display layer (20) and a pixel separation layer (10); The display layer (20) includes a green sub-pixel (21a), a red sub-pixel (21b), and a blue sub-pixel (21c); The pixel separation layer (10) includes a first part (12), a second part (13) and a third part (14). The first part (12) covers a portion of the surface of the anode (211) of the green sub-pixel (21a), the second part (13) covers a portion of the surface of the anode (211) of the red sub-pixel (21b), and the third part (14) covers a portion of the surface of the anode (211) of the blue sub-pixel (21c). The slope angle of the first part (12) is smaller than that of the second part (13), and the slope angle of the first part (12) is smaller than that of the third part (14).

14. The display panel (400) according to claim 13, characterized in that, The display panel (400) further includes a pixel separation layer (10), which includes a first annular portion (15), a second annular portion (16), and a third annular portion (17). The first annular portion (15) surrounds the green sub-pixel (21a), the second annular portion (16) surrounds the red sub-pixel (21b), and the third annular portion (17) surrounds the blue sub-pixel (21c). Along the thickness direction of the display panel (400), the maximum thickness of the first annular portion (15) is less than the maximum thickness of the second annular portion (16), and the maximum thickness of the first annular portion (15) is less than the maximum thickness of the third annular portion (17).

15. A display panel (400), characterized in that, It includes a display layer (20) and a pixel separation layer (10); The display layer (20) includes a green sub-pixel (21a), a red sub-pixel (21b), and a blue sub-pixel (21c); The pixel separation layer (10) includes a first annular portion (15), a second annular portion (16), and a third annular portion (17). The first annular portion (15) surrounds the green sub-pixel (21a), the second annular portion (16) surrounds the red sub-pixel (21b), and the third annular portion (17) surrounds the blue sub-pixel (21c). Along the thickness direction of the display panel (400), the maximum thickness of the first annular portion (15) is less than the maximum thickness of the second annular portion (16), and the maximum thickness of the first annular portion (15) is less than the maximum thickness of the third annular portion (17).

16. The display panel (400) according to claim 2 or 10, characterized in that, The anodized coverage area (S2) of the green sub-pixel (21a) has a ring width greater than or equal to 3 μm.

17. The display panel (400) according to claim 16, characterized in that, The anodized coverage area (S2) of the green sub-pixel (21a) has a ring width greater than or equal to 4 μm and less than or equal to 5 μm.

18. The display panel (400) according to claim 16 or 17, characterized in that, The anodized coverage area (S2) of the red sub-pixel (21b) has a ring width greater than or equal to 2 μm and less than 3 μm.

19. The display panel (400) according to any one of claims 16 to 18, characterized in that, The anodized coverage area (S2) of the blue sub-pixel (21c) has a ring width greater than or equal to 2 μm and less than 3 μm.

20. The display panel (400) according to claim 3, 11 or 13, characterized in that, The slope angle of the first part (12) is less than or equal to 20°.

21. The display panel (400) according to claim 20, characterized in that, The slope angle of the first part (12) is greater than or equal to 10°, and the slope angle of the first part (12) is less than or equal to 15°.

22. The display panel (400) according to claim 20 or 21, characterized in that, The slope angle of the second part (13) is greater than or equal to 25°, and the slope angle of the third part (14) is greater than or equal to 25°.

23. The display panel (400) according to any one of claims 20 to 22, characterized in that, The slope angle of the second part (13) is less than or equal to 30°, and the slope angle of the third part (14) is less than or equal to 30°.

24. The display panel (400) according to claim 4, 12, 14 or 15, characterized in that, The maximum thickness of the first annular portion (15) is less than 1 μm.

25. The display panel (400) according to claim 24, characterized in that, The maximum thickness of the first annular portion (15) is greater than or equal to 0.5 μm and less than or equal to 0.8 μm.

26. The display panel (400) according to claim 24 or 25, characterized in that, The maximum thickness of the second annular portion (16) is greater than or equal to 1 μm and less than or equal to 1.5 μm.

27. The display panel (400) according to any one of claims 24 to 26, characterized in that, The maximum thickness of the third annular portion (17) is greater than or equal to 1 μm and less than or equal to 1.5 μm.

28. The display panel (400) according to any one of claims 1 to 27, characterized in that, The green sub-pixel (21a) satisfies: C22 / C21≥1, where C21 is the anode parasitic capacitance of the green sub-pixel (21a) when the total usage time of the display panel (400) is T1, and C22 is the anode parasitic capacitance of the green sub-pixel (21a) when the total usage time of the display panel (400) is T2, where T1 is less than T2, and the anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode (211) of the sub-pixel (21) and the pixel separation layer (10) of the display panel (400) along the thickness direction of the display panel (400).

29. The display panel (400) according to claim 28, characterized in that, The green sub-pixel (21a) satisfies: 1 < C22 / C21 < 1.

2.

30. The display panel (400) according to any one of claims 1 to 28, characterized in that, The green sub-pixel (21a) satisfies: C2 / C1≥0.5, where C1 is the device capacitance of the green sub-pixel (21a) when the total usage time of the display panel (400) is T1, and C2 is the anode parasitic capacitance of the green sub-pixel (21a) when the total usage time of the display panel (400) is T1. The device capacitance is the capacitance formed by the anode (211) and cathode (213) of the sub-pixel (21), and the anode parasitic capacitance is the parasitic capacitance formed by the overlapping area of ​​the anode (211) of the sub-pixel (21) and the pixel separation layer (10) of the display panel (400) along the thickness direction of the display panel (400).

31. The display panel (400) according to claim 30, characterized in that, The green sub-pixel (21a) satisfies: 0.5≤C2 / C1<10.

32. A display screen (200), characterized in that, It includes a cover plate (300) and a display panel (400) as claimed in any one of claims 1 to 31, wherein the cover plate (300) is located on the display side of the display panel (400).

33. An electronic device, characterized in that, It includes a housing (100) and a display screen (200) as claimed in claim 32, the display screen (200) being connected to the housing (100).

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