Display panel and display device

Abstract

This disclosure provides a display panel and a display device. The display panel includes: a substrate; a light-emitting layer stacked on one side of the substrate; an encapsulation layer stacked on the side of the light-emitting layer away from the substrate; and a color filter layer disposed on the side of the encapsulation layer away from the light-emitting layer. The color filter layer includes: a black matrix, a first color filter unit, and a second color filter unit. The first color filter unit is disposed at a first opening of the black matrix, and the second color filter unit is disposed at a second opening of the black matrix. The orthographic projections of the second color filter unit and the first color filter unit on the substrate do not overlap. The orthographic projection of the second color filter unit on the substrate at least partially overlaps with the orthographic projection of the black matrix on the substrate. The overlap area between the second color filter unit and the black matrix is ​​greater than the overlap area between the first color filter unit and the black matrix.

Description

Technical Field

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

[0002] To improve the light emission gain and integration of OLED (Organic Light Emitting Diode) displays, COE (Color Filter on Encapsulation) technology emerged, replacing the traditional polarizer solution. This technology places the color filter above the pixel structure and covers the remaining area with a black matrix (BM), thereby increasing the light emission gain and ensuring a black effect when the screen is off. However, this solution offers a relatively limited range of colors when the screen is off, which is not ideal for meeting the increasingly diverse needs of various applications. Summary of the Invention

[0003] This disclosure provides a display panel and display device that can effectively improve the above-mentioned problems.

[0004] In a first aspect, embodiments of this disclosure provide a display panel, including:

[0005] Substrate;

[0006] A light-emitting layer is stacked and disposed on one side of the substrate.

[0007] An encapsulation layer is stacked and disposed on the side of the light-emitting layer away from the substrate.

[0008] A color filter layer is disposed on the side of the encapsulation layer away from the light-emitting layer, and the color filter layer includes: a black matrix, a first color filter unit, and a second color filter unit;

[0009] The first color filter unit is disposed at the first opening of the black matrix, and the second color filter unit is disposed at the second opening of the black matrix. The orthographic projections of the second color filter unit and the first color filter unit on the substrate do not overlap. The orthographic projection of the second color filter unit on the substrate and the orthographic projection of the black matrix on the substrate at least partially overlap. The overlap area between the second color filter unit and the black matrix is ​​greater than the overlap area between the first color filter unit and the black matrix.

[0010] Furthermore, the orthographic projection of the first color filter unit, whose color is different from that of the second color filter unit, onto the substrate is the first projection area, and the orthographic projection of the second color filter unit onto the substrate is the second projection area. The minimum gap between the first projection area and the second projection area is 0.5 to 2.5 micrometers.

[0011] Furthermore, there are multiple first color filter units, including a first color filter unit of a first color and a first color filter unit of a second color, wherein the second color filter unit is a third color.

[0012] Furthermore, the second color filter unit is a mesh structure with a third opening, the first color filter unit of the first color and the first color filter unit of the second color are located in the corresponding third opening, and the orthographic projection of the second opening on the substrate is located in the orthographic projection of the second color filter unit on the substrate.

[0013] Furthermore, the first color is red, the second color is blue, and the third color is green.

[0014] Furthermore, there are multiple second color filter units, and the multiple second color filter units are not interconnected. The orthographic projection of the second opening on the substrate is located within the orthographic projection of the second color filter unit on the substrate.

[0015] Furthermore, the second color filter unit has multiple boundary lines, each boundary line facing a first color filter unit of another color.

[0016] Furthermore, the first color filter unit of the first color and the second color are circular or elliptical, and the shape of the second color filter unit is octagonal.

[0017] Furthermore, the first color is red, the second color is green, the third color is blue, the area of ​​the first opening is smaller than the area of ​​the second opening, and each boundary line is a curve adapted to the first color filter unit directly opposite.

[0018] Furthermore, the first opening and the second opening are circular. In the second color filter unit, the minimum distance between the first and second boundary lines that are directly opposite each other is a first length, and the minimum distance between the third and fourth boundary lines that are directly opposite each other is a second length.

[0019] Wherein, the first boundary line and the second boundary line are directly opposite the first color filter unit of the first color, and the third boundary line and the fourth boundary line are directly opposite the first color filter unit of the second color;

[0020] The ratio between the first length and the first diameter is between 2.1 and 2.4, the ratio between the second length and the first diameter is between 1.2 and 1.4, and the first diameter is the diameter of the second opening.

[0021] Furthermore, the first color is blue, the second color is green, and the third color is red. The area of ​​the second opening is smaller than the area of ​​the first opening corresponding to the first color filter unit of the first color. In the second color filter unit, the two pairs of boundary lines facing the first color filter unit of the first color are straight lines, and the two pairs of boundary lines facing the first color filter unit of the second color are curves.

[0022] Furthermore, the first opening and the second opening are circular. In the second color filter unit, the minimum distance between the first and second boundary lines that are directly opposite each other is a first length, and the minimum distance between the third and fourth boundary lines that are directly opposite each other is a second length.

[0023] Wherein, the first boundary line and the second boundary line are directly opposite the first color filter unit of the first color, and the third boundary line and the fourth boundary line are directly opposite the first color filter unit of the second color;

[0024] The ratio between the first length and the first diameter is between 2.7 and 2.9, and the ratio between the second length and the first diameter is between 1.5 and 1.8. The first diameter is the diameter of the second opening.

[0025] Furthermore, the pixel density of the display panel is greater than or equal to 538 PPI.

[0026] Secondly, embodiments of this disclosure provide a display device, including the display panel provided in the first aspect above.

[0027] The technical solutions provided in this disclosure have at least the following technical effects or advantages:

[0028] The display panel provided in this embodiment includes a second color filter unit disposed in the color filter layer. The orthographic projection of the second color filter unit onto the substrate at least partially overlaps with the orthographic projection of the black matrix onto the substrate, and the overlap area between the second color filter unit and the black matrix is ​​larger than the overlap area between the first color filter unit and the black matrix. On the one hand, the second color filter unit can filter the light beam passing through the second opening; on the other hand, it can also make the black matrix area covered by the second color filter unit have a reflective hue, effectively enriching the screen-off colors achievable by the display panel. Furthermore, the orthographic projections of the first color filter unit and the second color filter unit onto the substrate do not overlap, which is beneficial to improving the uniformity of the screen-off colors.

[0029] The above description is merely an overview of the technical solution disclosed herein. In order to better understand the technical means of this disclosure and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this disclosure more apparent and understandable, specific embodiments of this disclosure are described below. Attached Figure Description

[0030] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this disclosure. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0031] Figure 1 This is a schematic diagram of an exemplary structure of the display panel in an embodiment of this disclosure;

[0032] Figure 2 This is an exemplary partial top view of the display panel in an embodiment of this disclosure;

[0033] Figure 3 This is a schematic diagram of a pixel arrangement in an embodiment of this disclosure;

[0034] Figure 4 This is a schematic diagram of an orthographic projection in an embodiment of this disclosure;

[0035] Figure 5 This is a schematic diagram of the structure of a first exemplary second color filter unit in an embodiment of this disclosure;

[0036] Figure 6 This is a schematic diagram of the structure of a second exemplary second color filter unit in an embodiment of this disclosure;

[0037] Figure 7 This is a schematic diagram of the structure of a third exemplary second color filter unit in the embodiments of this disclosure. Detailed Implementation

[0038] In the COE structure, the spaces between the color filters directly opposite the pixel structure are filled with a black matrix. Since the black matrix has no hue, the display panel can only appear black when the screen is off, which is relatively simple.

[0039] Therefore, this disclosure provides a display panel and a display device using the display panel. The display panel includes: a substrate; a light-emitting layer stacked on one side of the substrate; an encapsulation layer stacked on the side of the light-emitting layer away from the substrate; and a color filter layer stacked on the side of the encapsulation layer away from the light-emitting layer. The color filter layer includes: a black matrix, a first color filter unit, and a second color filter unit. The first color filter unit is disposed at a first opening of the black matrix; the second color filter unit is disposed at a second opening of the black matrix. The orthographic projection of the second color filter unit on the substrate does not overlap with the orthographic projection of the first color filter unit on the substrate. The orthographic projection of the second color filter unit on the substrate at least partially overlaps with the orthographic projection of the black matrix on the substrate. The overlap area between the second color filter unit and the black matrix is ​​greater than the overlap area between the first color filter unit and the black matrix.

[0040] On the one hand, the second color filter unit can filter the light beam passing through the second opening. On the other hand, it can also make the black matrix area covered by the second color filter unit have a reflective hue. Thus, by configuring the color of the second color filter unit, the screen-off hue required for actual application scenarios can be achieved, enriching the screen-off colors that the display panel can achieve.

[0041] In addition, the orthographic projection of the first color filter unit, which is different in color from the second color filter unit, on the substrate does not overlap with the orthographic projection of the second color filter unit on the substrate. This can prevent the formation of a different hue at the overlapping area of ​​different color filters when the screen is off, which is beneficial to improving the uniformity of the hue when the screen is off.

[0042] Exemplary embodiments of the display panel and display device provided in this disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the dimensions of layers and regions may be exaggerated in the drawings for clarity of illustration. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this disclosure and to fully convey the scope of this disclosure to those skilled in the art. The term "a plurality of" includes two or more cases.

[0043] Firstly, such as Figure 1 and Figure 2 As shown, this embodiment of the present disclosure provides a display panel 100, including: a substrate 110, a light-emitting layer 120, an encapsulation layer 130, and a color filter layer 140.

[0044] For example, the substrate 110 can be an inorganic substrate (such as glass, quartz, sapphire or silicon wafer) or an organic flexible substrate (such as polyimide (PI), polyethylene terephthalate (PET), polycarbonate, polyethylene, polyacrylate, polyetherimide or polyethersulfone, etc.), and this embodiment does not limit it.

[0045] A light-emitting layer 120 is stacked and disposed on one side of the substrate 110. The light-emitting layer 120 includes multiple light-emitting units. For example, the multiple light-emitting units may include blue light-emitting units, red light-emitting units, and green light-emitting units. Alternatively, the multiple light-emitting units may be at least partially blue light-emitting units, and further obtained through color conversion to obtain the three primary colors of light. Or, the multiple light-emitting units may be at least partially white light-emitting units, and further obtained through color filtering to obtain the three primary colors of light. The specific configuration can be set according to the needs of the actual scenario.

[0046] For example, the light-emitting unit can be an organic light-emitting diode (OLED), a quantum dot light-emitting diode (QLED), or a polymer light-emitting diode (PLED), and this embodiment is not limited thereto. Taking an OLED as an example, the light-emitting unit may include: an anode, an organic light-emitting material layer, and a cathode stacked together. Of course, in addition, the light-emitting unit may also include one or more material layers selected from the following: a hole injection layer, a hole transport layer, a hole blocking layer, an electron transport layer, and an electron injection layer, which can be specifically configured according to actual needs.

[0047] It is understood that the display panel 100 includes multiple sub-pixels, each of which includes the aforementioned light-emitting unit and a pixel circuit that drives the light-emitting unit to emit light. The light-emitting unit is configured to emit visible light to achieve screen display.

[0048] For example, the display panel 100 may further include a backplane and a pixel defining layer (PDL). The backplane is disposed on the side of the substrate 110 near the light-emitting layer 120, and includes multiple pixel circuits. Each pixel circuit is connected to a corresponding light-emitting unit to drive the light-emitting unit to emit light. The pixel defining layer 121 defines multiple opening regions on the backplane. These opening regions are used to define the effective light-emitting area of ​​each light-emitting unit to separate the light-emitting units of different sub-pixels and prevent cross-coloring between the light-emitting units of adjacent sub-pixels during the light-emitting process.

[0049] The encapsulation layer 130 is stacked on the side of the light-emitting layer 120 away from the substrate 110. It not only isolates the light-emitting layer 120 from the outside world, preventing water and oxygen from invading the light-emitting layer 120 and affecting the lifespan of the display panel 100, but also achieves a planarization effect, so that the color filter layer 140 can be made on a flat surface, which is more conducive to the display effect of the display panel 100.

[0050] For example, the encapsulation layer 130 may contain at least three layers, depending on the specific requirements. In some examples, the encapsulation layer 130 may include a first inorganic film layer, an organic film layer, and a second inorganic film layer stacked together. The inorganic film layer acts as a water and oxygen barrier, and the second inorganic film layer encapsulates the organic film layer, preventing the organic film from being exposed. The organic film layer also acts as a planarizing agent, covering defects and particles generated during the encapsulation process, and relieving stress on the inorganic film layer.

[0051] The color filter layer 140 is stacked and disposed on the side of the encapsulation layer 130 away from the light-emitting layer 120. The color filter layer 140 includes: a black matrix 142, a first color filter unit 141, and a second color filter unit 144.

[0052] like Figure 1 As shown, the black matrix 142 has a first opening and a second opening. A first color filter unit 141 is disposed at the first opening of the black matrix 142, and a second color filter unit 144 is disposed at the second opening of the black matrix 142. The orthographic projection of the second color filter unit 144 on the substrate 110 does not overlap with the orthographic projection of the first color filter unit 141 on the substrate 110. The orthographic projection of the second color filter unit 144 on the substrate 110 at least partially overlaps with the orthographic projection of the black matrix 142 on the substrate 110, and the overlap area of ​​a single second color filter unit 144 and the black matrix 142 is greater than the overlap area of ​​a single first color filter unit 141 and the black matrix 142.

[0053] For example, the second color filter unit 144 can cover more than half of the black matrix 142 area, which can be set according to the actual needs of screen-off hue adjustment. As another example, except for the gap area reserved to avoid the first color filter unit, all other black matrix areas between different first color filter units are covered by the second color filter unit 144 to better adjust the screen-off hue of the display panel.

[0054] There are multiple first color filter units 141, each capable of filtering light beams passing through a corresponding first opening. The second color filter unit 144 filters light beams passing through a second opening and also adjusts the reflected hue of the black matrix 142 area covered by the second color filter unit 144. This allows the colors of the second color filter unit 144 to be pre-configured according to the required screen-off hue for a given scenario, achieving the desired screen-off color effect and effectively enriching the screen-off colors achievable by the display panel 100.

[0055] The color of the second color filter unit 144 can be configured according to the screen-off hue required by the actual application scenario. In some examples, the color of the second color filter unit 144 can be different from that of each of the first color filter units 141. For example, a single-color second color filter unit 144 can be set, or two different colors of the second color filter unit 144 can be set. This embodiment does not limit this. This embodiment mainly takes the use of a single-color second color filter unit 144 as an example. In this case, such as Figure 2As shown, the plurality of first color filter units 141 may include: a first color filter unit 141a of a first color and a first color filter unit 141b of a second color, and a second color filter unit 144 of a third color. The first color, the second color, and the third color are different colors. Of course, in other examples, a first color filter unit of a third color may also be included, and the specific configuration can be set according to actual needs. This embodiment does not limit this.

[0056] Each first color filter unit 141 and second color filter unit 144 corresponds to one or more sub-pixels, and the colors are also adapted to the sub-pixels, selectively transmitting the light emitted by the corresponding sub-pixels. Figure 3 A schematic diagram of an exemplary pixel structure is shown. Figure 3 As shown, the pixel structure includes multiple repeating units 300, each repeating unit 300 including: two green sub-pixels 301, one red sub-pixel 302, and one blue sub-pixel 303. The center points of the two green sub-pixels 301, the blue sub-pixel 303, and the red sub-pixel 302 are arranged in a diamond shape. The two green sub-pixels 301 are located at the two vertices corresponding to one diagonal, and the blue sub-pixel 303 and the red sub-pixel 302 are located at the two vertices corresponding to the other diagonal. It should be noted that... Figure 3 The pixel arrangement shown is for illustrative purposes only. In actual implementation, other arrangement methods may be used, and this embodiment does not limit this.

[0057] by Figure 3 Taking the GGRB pixel arrangement shown as an example, in this embodiment of the disclosure, the first color, the second color, and the third color can each be one of the three primary colors: red, green, and blue. For example, the first color can be red, the second color can be blue, and the third color can be green; or, the first color can be red, the second color can be green, and the third color can be blue; or, the first color can be blue, the second color can be green, and the third color can be red.

[0058] In some examples, the first and second openings of the black matrix 142 correspond to the PDL opening regions of the corresponding sub-pixels. For example... Figure 2As shown, the sizes of the first openings 143a and 143b of the black matrix 142 are larger than the sizes of the corresponding PDL opening regions 122a and 122b, and smaller than the sizes of the corresponding first color filter units 141a and 141b. The size of the second opening 143c of the black matrix 142 is larger than the size of the corresponding PDL opening region 122c, and smaller than the size of the corresponding second color filter unit 144. That is, the orthographic projections of the PDL opening regions 122a and 122b corresponding to the first openings 143a and 143b on the substrate 110 are located within the orthographic projections of the corresponding first openings 143a and 143b on the substrate 110, and the orthographic projections of the first openings 143a and 143b on the substrate 110 are located within the orthographic projections of the corresponding first color filter units 141a and 141b on the substrate 110. The orthographic projection of the PDL opening region 122c corresponding to the second opening 143c on the substrate 110 is located within the orthographic projection of the second opening 143c on the substrate 110, and the orthographic projection of the second opening 143c on the substrate 110 is located within the orthographic projection of the second color filter unit 144 on the substrate 110.

[0059] In some examples, considering the manufacturing process and the L-Decay decay of the screen (i.e., the brightness decay curve with viewing angle), the smaller the outward expansion value of the first opening 143a, 143b and the second opening 143c of the black matrix 142 relative to their respective PDL opening regions, the larger the area of ​​the black matrix 142. Therefore, the larger the overlap area between the second color filter unit 144 and the black matrix 142, the better it is for adjusting the screen-off hue. For example, considering the manufacturing process, L-Decay requirements, and the desired screen-off hue, the outward expansion value can be between 2 and 4 micrometers.

[0060] The orthographic projection of the first color filter unit, which is different in color from the second color filter unit 144, on the substrate 110 does not overlap with the orthographic projection of the second color filter unit 144 on the substrate 110. This can prevent the formation of a different hue at the overlapping area of ​​different color filters when the screen is off, which is beneficial to improving the uniformity of the hue when the screen is off.

[0061] For example, such as Figure 4 As shown, the color of the first color filter unit (e.g., the second color filter unit 144) is different from that of the second color filter unit 144. Figure 2 The orthographic projection of 141a and 141b in the figure onto the substrate 110 is the first projection region 401 (corresponding to Figure 2 141a) and 402 (corresponding to Figure 2 In section 141b), the orthographic projection of the second color filter unit 144 onto the substrate 110 is the second projection region 403, and the minimum gap between the first projection region and the second projection region (e.g., 141b) is the minimum gap between the first projection region and the second projection region (e.g., 141b). Figure 4 The x1 and x2 shown can be 0.5–2.5 micrometers. It should be noted that... Figure 4 Only the orthographic projections of two first color filter units and one second color filter unit on the substrate 110 are shown for illustrative purposes; the orthographic projections of the remaining first and second color filter units are not shown. For example, depending on the process conditions, the second color filter unit 144 of different colors can be spaced 2.5 micrometers apart from the first color filter unit to avoid overlap between the first and second color filter units 144 of different colors due to process precision reasons, which would result in a hue different from other areas at the overlap.

[0062] Figures 5-7 Three exemplary structural diagrams of the second color filter unit 144 are shown below. Figures 5-7 An exemplary embodiment of the second color filter unit 144 will be described. It should be noted that... Figures 5-7 This is merely a structural example and does not limit the colors of each color filter unit. The colors of the first color filter unit and the second color filter unit 144 can be set according to actual needs. In some examples, such as Figure 5 As shown, when the gap between the first color filter unit 141a of the first color and the first color filter unit 141b of the second color is relatively large, the second color filter unit 144 can be a mesh structure with a third opening 1441, in which the first color filter unit 141a of the first color and the first color filter unit 141b of the second color are located within the corresponding third opening 1441. This mesh structure has a lower coating risk and can reduce the risk of peeling of the color filter layer 140.

[0063] For example, the first color is red, the second color is blue, and the third color is green. The green second color filter unit 144 with a mesh structure can fill the second opening 143c of the black matrix 142 and cover the gap area between the red first color filter unit and the blue first color filter unit, and leave a gap between it and the red first color filter unit and the blue first color filter unit to avoid overlapping with the blue first color filter unit and the red first color filter unit.

[0064] In one specific example, by setting the green second color filter unit 144 of the aforementioned mesh structure, the screen-off hue (a*, b*) is adjusted to (-5.4, -8.6), causing the screen-off color to move closer to the blue-green region in the CIE Lab hue diagram. Here, a* and b* are two color channels in the CIE Lab hue diagram: channel a (a*) ranges from red to dark green; channel b (b*) ranges from blue to yellow. A negative a* value corresponds to a green hue, and a positive a* value corresponds to a red hue; a negative b* value corresponds to a blue hue, and a positive b* value corresponds to a yellow hue.

[0065] In some examples, when the gap between the first color filter unit 141a of the first color and the first color filter unit 141b of the second color is relatively small, such as Figure 6 and Figure 7 As shown, there can be multiple second color filter units 144, and these multiple second color filter units 144 are not interconnected. For ease of explanation, this structure with multiple units arranged in this paper and not interconnected is referred to as an island structure.

[0066] When the gap between the first color filter unit 141a of the first color and the first color filter unit 141b of the second color is relatively small, the second color filter unit 144 can be set to avoid this gap to reduce the risk of peeling. At this time, when forming the second color filter unit 144 of the third color, the color filter can be filled by interrupting the gap between the first color and the second color filter units, so that the formed second color filter units 144 are not interconnected and present an island-like structure.

[0067] For example, when the first color is red, the second color is green, and the third color is blue, the blue second color filter unit 144 can cover the corresponding second opening 143c and extend to the gap area between the second opening 143c and the red and green first color filter units. Adjacent blue second color filter units 144 are separated at the gap between the green and red first color filter units. In a specific example, by setting blue and non-connected second color filter units 144, the screen-off hue (a*, b*) is adjusted to (-5.8, -8.4), at which point the screen-off color moves closer to the blue-green area in the CIE Lab hue diagram.

[0068] For example, when the first color is blue, the second color is green, and the third color is red, the red second color filter unit 144 can cover the corresponding second opening 143c and extend to the interval area between the second opening 143c and the green first color filter unit, and between the second opening 143c and the blue first color filter unit. Adjacent red second color filter units 144 are separated by the gap between the green first color filter unit and the blue first color filter unit. In a specific example, by setting red and non-connected second color filter units 144, the screen-off hue (a*, b*) is adjusted to (-5.8, -7.8). At this time, compared with the above-mentioned methods of setting green second color filter units 144 and setting blue second color filter units 144, the blue-green degree of the screen-off color is closer to the red area in the CIE Lab hue diagram.

[0069] Understandably, the higher the resolution of the display panel 100, the greater the pixel density, and the smaller the gap between adjacent sub-pixels. This also means the smaller the gap between the first color filter unit 141a of the first color and the first color filter unit 141b of the second color. Pixel density refers to the number of pixels per inch, measured in PPI (Pixels Per Inch). For example, a QHD (Quad High Definition) display panel 100, i.e., a 2K screen, has a resolution of 2560×1440p and a pixel density of 538 PPI. Figure 3 The pixel arrangement is shown, and when the second color filter unit 144 is blue, the minimum gap between the red first color filter unit and the green first color filter unit may be less than 3 micrometers.

[0070] Therefore, for a display panel 100 with relatively high resolution and high pixel density, for example, a pixel density greater than or equal to 538 PPI, the second color filter unit 144 is set as the island structure described above, that is, multiple second color filter units 144 are set and each second color filter unit 144 is not connected to each other. On the one hand, this helps to reduce the requirements for process precision, and on the other hand, it can also avoid color overlap and peeling problems caused by filling the color filter in too small gaps.

[0071] Understandably, the boundaries of the island-like structure are closed. In some examples, the second color filter unit 144 includes multiple boundary lines, and each boundary line is directly opposite a first color filter unit of another color, such as... Figure 6 and Figure 7 As shown. This allows the boundary line of the second color filter unit 144 to match the boundary shape of the surrounding first color filter units of different colors, which helps to maximize the area of ​​the second color filter unit 144 while avoiding overlap with first color filter units of different colors, so as to achieve a better screen-off hue adjustment effect.

[0072] For example, the shape of the first color filter unit can be circular, elliptical, prismatic, pentagonal, or hexagonal, etc. It is usually adapted to the shape of its directly opposite first openings 143a and 143b and the corresponding sub-pixel.

[0073] Taking the first color filter unit 141a of the first color and the first color filter unit 141b of the second color as an example, when using Figure 3 When showing the pixel arrangement, such as Figure 6 and Figure 7 As shown, the second color filter unit 144 can be octagonal, with each boundary line of the octagon facing a first color filter unit of another color. Of course, the second color filter unit 144 can also be designed into other shapes according to the actual pixel arrangement and the shapes of adjacent first color filter units; this embodiment does not impose any restrictions on this.

[0074] In practice, the boundary line of the aforementioned octagonal second color filter unit 144 can be either a curve or a straight line. Two exemplary configuration methods are described below.

[0075] The first type, such as Figure 6 As shown, when the area of ​​the first opening 143a, 143b is smaller than the area of ​​the second opening 143c, each boundary line of the octagonal second color filter unit 144 can be a curve adapted to the opposite first color filter unit.

[0076] For example, the first color is red, the second color is green, and the third color is blue. Figure 3 Taking the illustrated GGRB pixel arrangement as an example, the area of ​​a single blue sub-pixel is larger than the area of ​​a single green sub-pixel, and also larger than the area of ​​a single red sub-pixel. Correspondingly, the area of ​​the second opening 143c is larger than the areas of the first openings 143a and 143b. At this time, a portion of the boundary line of the blue second color filter unit 144 faces the green first color filter unit, and another portion of the boundary line faces the red first color filter unit. To accommodate the relatively small circular or elliptical boundary lines of the green and red first color filter units, each boundary line of the second color filter unit 144 can be a curve.

[0077] For example, the area of ​​the first opening directly opposite the green first color filter unit is defined as the first area, the area of ​​the second opening directly opposite the blue second color filter unit 144 is defined as the second area, the area of ​​the first opening directly opposite the red first color filter unit is defined as the third area, and the area of ​​the blue second color filter unit 144 is defined as the fourth area. For example, the fourth area can be 4.17 to 5.77 times the first area, 2.8 to 3.89 times the second area, and 4.51 to 6.25 times the third area.

[0078] The second type, such as Figure 7 As shown, when the area of ​​the second opening 143c is smaller than the area of ​​the first opening 143b corresponding to the first color filter unit 141b of the second color, in the second color filter unit 144, the two pairs of boundary lines facing the first color filter unit 141b of the second color can both be straight lines, and the two pairs of boundary lines facing the first color filter unit 141a of the first color can both be curves.

[0079] For example, if the first color is blue, the second color is green, and the third color is red, then... Figure 3Taking the illustrated GGRB pixel arrangement as an example, the area of ​​the first opening directly opposite the blue first color filter unit is larger than the area of ​​the second opening corresponding to the red second color filter unit 144, and the area of ​​the blue first color filter unit is larger than the area of ​​the green first color filter unit. At this time, a portion of the boundary line of the red second color filter unit 144 faces the green first color filter unit, and another portion of the boundary line faces the blue first color filter unit. Since the area of ​​the blue first color filter unit is relatively large and the curvature of its boundary line is small, the boundary line of the red second color filter unit 144 facing the blue first color filter unit can be a straight line. However, since the area of ​​the green first color filter unit is relatively small and the curvature of its boundary line is large, the boundary line of the red second color filter unit 144 facing the green first color filter unit can be a curve, and its curvature matches that of the green first color filter unit's boundary line.

[0080] At this point, the area of ​​the first opening directly opposite the blue first color filter unit 144 is defined as the fifth area, the area of ​​the second opening directly opposite the red second color filter unit 144 is defined as the sixth area, and the area of ​​the red second color filter unit 144 is defined as the seventh area. For example, the seventh area can be 4.0 to 5.7 times the first area, 2.7 to 3.8 times the fifth area, and 4.3 to 6.2 times the sixth area.

[0081] In this paper, two boundary lines that are set opposite each other are referred to as a pair of boundary lines. Any pair of boundary lines in the octagonal second color filter unit 144 that are directly opposite the first color filter unit 141a of the first color are defined as the first boundary line and the second boundary line; any pair of boundary lines that are directly opposite the first color filter unit 141b of the second color are defined as the third boundary line and the fourth boundary line. The minimum distance between the first boundary line and the second boundary line is defined as the first length L1, and the minimum distance between the third boundary line and the fourth boundary line is defined as the second length L2.

[0082] As shown, in the first exemplary configuration described above, the ratio between the first length L1 and the first diameter can be between 2.1 and 2.4, the ratio between the first length L1 and the second diameter can be between 2.6 and 2.9, and the ratio between the first length L1 and the third diameter can be between 2.7 and 3.0. The ratio between the second length L2 and the first diameter can be between 1.2 and 1.4, the ratio between the second length L2 and the second diameter can be between 1.4 and 1.7, and the ratio between the second length L2 and the third diameter can be between 1.5 and 1.8. Wherein, the first diameter is the diameter of the second opening 143c directly opposite the second color filter unit 144, the second diameter is the diameter of the first opening 143a directly opposite the first color filter unit 141a of the first color, and the third diameter is the diameter of the first opening 143b directly opposite the first color filter unit 141b of the second color.

[0083] For example, the first color is red, the second color is green, and the third color is blue. The diameter of the first opening directly opposite the red first color filter unit is 22 micrometers, the diameter of the first opening directly opposite the green first color filter unit is 22.9 micrometers, and the diameter of the second opening directly opposite the blue second color filter unit 144 is 27.9 micrometers. The red first color filter unit and the green first color filter unit are both extended outward by 4 micrometers relative to the first opening of the black matrix directly opposite them. The first length L1 of the blue second color filter unit 144 can be between 60.8 and 64.8 micrometers, and the second length L2 can be between 34.2 and 38.3 micrometers.

[0084] like Figure 7 As shown, in the second exemplary configuration described above, the ratio between the first length L1 and the first diameter can be between 2.7 and 2.9, the ratio between the first length L1 and the second diameter can be between 2.6 and 2.8, and the ratio between the first length L1 and the third diameter can be between 2.1 and 2.3. The ratio between the second length L2 and the first diameter is between 1.5 and 1.8, the ratio between the second length L2 and the second diameter can be between 1.4 and 1.7, and the ratio between the second length L2 and the third diameter can be between 1.2 and 1.4.

[0085] For example, the first color is blue, the second color is green, and the third color is red. The diameter of the second opening of the black matrix directly opposite the red second color filter unit 144 is 22 micrometers. The diameter of the first opening of the black matrix directly opposite the green first color filter unit is 22.9 micrometers. The diameter of the first opening of the black matrix 142 directly opposite the blue first color filter unit is 27.9 micrometers. The green first color filter unit and the blue first color filter unit are both extended outward by 4 micrometers relative to the first opening of the directly opposite black matrix 142. The first length L1 of the red second color filter unit 144 can be between 59.8 and 63.8 micrometers, and the second length L2 can be between 34.2 and 38.3 micrometers.

[0086] In the two exemplary configurations described above, when the two opposing boundary lines in the second color filter unit 144 are directly opposite the first color filter unit of the same color, the two opposing boundary lines can be arranged in an axially symmetrical manner.

[0087] It should be noted that due to the different color filter materials and the different sizes and shapes of black matrix openings, the hue simulation values ​​vary greatly. Based on the actual screen-off hue requirements of the product, the refractive index and extinction coefficient (nk) of the materials in each area of ​​the display panel 100 can be collected in advance for simulation. Based on the shape and size of the black matrix opening, the thickness of each color filter unit, and the color of the second color filter unit 144, multiple hue results can be obtained, and then a more suitable design can be selected according to the requirements.

[0088] For example, in a commonly used COE structure, the thickness of the green, blue, and red color filter units is 3 micrometers. In some examples of embodiments of this disclosure, the thickness of the red color filter unit can be adjusted to 2 micrometers, and the thickness of the green and blue color filter units can be adjusted to 4 micrometers. For example, when the color filter layer 140 includes a green first color filter unit, a blue first color filter unit, and a red second color filter unit 144, the thickness of the green first color filter unit and the blue first color filter unit can be 4 micrometers, and the thickness of the red second color filter unit 144 can be 2 micrometers. As another example, when the color filter layer 140 includes a green first color filter unit, a red first color filter unit, and a blue second color filter unit 144, the thickness of the green first color filter unit and the blue second color filter unit 144 can be 4 micrometers, and the thickness of the red first color filter unit can be 2 micrometers. The specific configuration can be adjusted according to actual needs, and this embodiment does not impose any limitations on this.

[0089] By adjusting the thickness of the aforementioned color filter units, the off-screen hue (a*, b*) of the display panel 100 can be changed from (-5, -8) to (1, -7). This is because the thickness of the red color filter is reduced, resulting in more red reflection, while the thickness of the green and blue color filters is increased, leading to increased light absorption and less blue-green reflection, causing the color to shift towards red. Therefore, adjusting the thickness of each color filter unit in the color filter layer can also achieve the adjustment of the off-screen hue.

[0090] It should also be noted that, since the display panel 100 typically includes optically clear adhesive (OCA) and cover glass (CG) and other module materials, which are relatively thick, directly using refractive index for screen-off color simulation results in poor accuracy. During correction, OCA and CG can be combined with measured spectra for data correction simulation, further improving simulation accuracy. Furthermore, the module materials themselves also possess hue; therefore, targeted optimization design can be performed based on the hue results of the module materials to obtain different hue display effects.

[0091] Secondly, embodiments of this disclosure also provide a display device, including the display panel 100 provided in the first aspect above. For example, the display device can be any product or component with display function, such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, or navigator.

[0092] The above description does not provide detailed technical specifications regarding the layout of each layer of the product. However, those skilled in the art should understand that layers and regions of the desired shape can be formed using various technical means. Furthermore, to form the same structure, those skilled in the art can also design methods that are not entirely identical to those described above. Although various embodiments have been described above, this does not mean that the measures in the various embodiments cannot be used advantageously in combination.

[0093] Numerous specific details are set forth in the specification provided herein. However, it will be understood that embodiments of this disclosure may be practiced without these specific details. In some instances, well-known methods, structures, and techniques have not been shown in detail so as not to obscure the understanding of this specification.

[0094] Furthermore, those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this disclosure is limited to these examples; within the framework of this disclosure, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this specification as described above, which are not provided in detail for the sake of brevity.

[0095] Although preferred embodiments have been described in this specification, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this specification.

Claims

1. A display panel, characterized in that, include: Substrate; A light-emitting layer is stacked and disposed on one side of the substrate. An encapsulation layer is stacked and disposed on the side of the light-emitting layer away from the substrate. A color filter layer is disposed on the side of the encapsulation layer away from the light-emitting layer, and the color filter layer includes: a black matrix, a first color filter unit, and a second color filter unit; The first color filter unit is disposed at the first opening of the black matrix, and the second color filter unit is disposed at the second opening of the black matrix. The orthographic projection of the second color filter unit on the substrate overlaps at least partially with the orthographic projection of the black matrix on the substrate. The overlap area between the second color filter unit and the black matrix is ​​greater than the overlap area between the first color filter unit and the black matrix. The first color filter unit has multiple units, including a first color filter unit of a first color and a first color filter unit of a second color, wherein the second color filter unit is of a third color; and There are multiple second color filter units, and the multiple second color filter units are island-shaped structures that are not interconnected. The first color filter unit of the first color and the first color filter unit of the second color are located between adjacent second color filter units. The first opening and the second opening are circular, the first color filter unit of the first color and the second color are circular, the second color filter unit is octagonal, each boundary line of the octagon is opposite to one of the first color filter units, the two pairs of boundary lines of the octagon opposite the first color filter unit of the first color are straight lines, and the two pairs of boundary lines opposite the first color filter unit of the second color are curves whose shape is adapted to the first color filter unit of the second color.

2. The display panel according to claim 1, characterized in that, The first color filter unit, whose color is different from that of the second color filter unit, has its orthographic projection on the substrate as a first projection area, and the second color filter unit has its orthographic projection on the substrate as a second projection area. The minimum gap between the first projection area and the second projection area is 0.5 to 2.5 micrometers.

3. The display panel according to claim 1, characterized in that, The orthographic projection of the second opening on the substrate is located within the orthographic projection of the second color filter unit on the substrate.

4. The display panel according to claim 3, characterized in that, The first color is red, the second color is blue, and the third color is green.

5. The display panel according to claim 1, characterized in that, The first color is blue, the second color is green, and the third color is red. The area of ​​the second opening is smaller than the area of ​​the first opening corresponding to the first color filter unit of the first color.

6. The display panel according to claim 5, characterized in that, The first and second openings are circular. In the second color filter unit, the minimum distance between the first and second boundary lines that are directly opposite each other is a first length, and the minimum distance between the third and fourth boundary lines that are directly opposite each other is a second length. Wherein, the first boundary line and the second boundary line are directly opposite the first color filter unit of the first color, and the third boundary line and the fourth boundary line are directly opposite the first color filter unit of the second color; The ratio between the first length and the first diameter is between 2.7 and 2.9, and the ratio between the second length and the first diameter is between 1.5 and 1.

8. The first diameter is the diameter of the second opening.

7. The display panel according to claim 1, characterized in that, The display panel has a pixel density greater than or equal to 538 PPI.

8. A display device, characterized in that, The display panel includes any one of claims 1-7.

Images