A display panel and a display device

Abstract

The application discloses a display panel and a display device, comprising: a substrate, an OLED light-emitting layer, a reflective layer, a light-blocking layer and a color resistance layer are sequentially and layerwisely arranged on the substrate; the reflective layer has a first opening, the orthographic projection of the first opening on the substrate overlaps with the orthographic projection of a light-emission area of the OLED light-emitting layer on the substrate; the light-blocking layer has a second opening, the orthographic projection of the first opening on the substrate is located in the orthographic projection of the second opening on the substrate; the display panel comprises a first area and a second area, the size of the second opening corresponding to the pixels of the same color in the first area is smaller than that in the second area, the light-blocking layer has a third opening in the first area, and the third opening and the second opening are independent of each other. In this way, by arranging the third opening on the light-blocking layer in the first area, the reflectivity of the first area is increased, thereby reducing the reflectivity difference between the first area and the second area and improving the display effect of the display panel.

Description

Technical Field

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

[0002] In display panels, a high-refractive-index color resist layer, a low-refractive-index reflective layer, and a light-shielding layer are typically used to create the color filter. This utilizes the total internal reflection between the color resist layer and the reflective layer to improve the light emission efficiency of the display panel from the forward viewing angle.

[0003] However, when openings are made in the light-shielding layer, the edges of the light-shielding layer may peel off in some areas. This will cause the openings in the light-shielding layer to become larger, thereby increasing the reflectivity of the display panel in that area. This will result in alternating bright and dark stripes on the display panel, reducing the display effect.

[0004] Therefore, how to improve the display effect of the display panel has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0005] This invention provides a display panel and a display device to improve the display effect of the display panel.

[0006] In a first aspect, embodiments of the present invention provide a display panel, comprising: a substrate, wherein an OLED light-emitting layer, a reflective layer, a light-shielding layer and a color resist layer are sequentially stacked on the substrate;

[0007] The reflective layer has a first opening, and the orthographic projection of the first opening on the substrate overlaps with the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer on the substrate.

[0008] The light-shielding layer has a second opening, the orthographic projection of the first opening on the substrate is located within the orthographic projection of the second opening on the substrate, the second opening is corresponding to the pixel in the light-emitting area, the color resist layer fills the first opening and the second opening, the reflective layer has a sidewall at the first opening, the color resist layer is in contact with the sidewall, and the refractive index of the color resist layer is greater than the refractive index of the reflective layer.

[0009] The display panel includes a first region and a second region. The size of the second opening corresponding to the pixels of the same color in the first region is smaller than the size in the second region. The light-shielding layer has a third opening in the first region. The orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer on the substrate. The third opening is independent of the second opening.

[0010] Secondly, embodiments of the present invention provide a display device, including a display panel as described in the first aspect above.

[0011] The beneficial effects of this invention are as follows:

[0012] This invention provides a display panel and display device, comprising: a substrate, on which an OLED light-emitting layer, a reflective layer, a light-shielding layer, and a color resist layer are sequentially stacked; the reflective layer has a first opening, the orthographic projection of the first opening on the substrate overlapping the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer on the substrate; the light-shielding layer has a second opening, the orthographic projection of the first opening on the substrate falling within the orthographic projection of the second opening on the substrate, the second opening corresponding to a pixel within the light-emitting area; the color resist layer filling the first and second openings; the reflective layer having a sidewall at the first opening, the color resist layer contacting the sidewall, and the refractive index of the color resist layer being greater than that of the reflective layer; the display panel includes a first region and a second region, the size of the second opening corresponding to pixels of the same color in the first region being smaller than the size in the second region; the light-shielding layer having a third opening in the first region, the orthographic projection of the third opening on the substrate not overlapping the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer on the substrate, and the third opening being independent of the second opening. Thus, by providing a third opening on the light-shielding layer in the first region, the reflectivity of the first region is increased, thereby reducing the reflectivity difference between the first and second regions and improving the display effect of the display panel. Attached Figure Description

[0013] Figure 1 This is a cross-sectional view of a display panel provided in an embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the first type of third opening morphology provided in an embodiment of the present invention;

[0015] Figure 3 This is a schematic diagram of the second type of third opening morphology provided in an embodiment of the present invention;

[0016] Figure 4 This is a schematic diagram of the third type of opening morphology provided in an embodiment of the present invention;

[0017] Figure 5 This is a schematic diagram of the fourth third opening morphology provided in an embodiment of the present invention;

[0018] Figure 6 This is a schematic diagram of the fifth type of third opening morphology provided in the embodiments of the present invention;

[0019] Figure 7 This is a schematic diagram of the sixth type of third opening morphology provided in the embodiments of the present invention;

[0020] Figure 8This is a schematic diagram of the seventh third opening morphology provided in the embodiments of the present invention;

[0021] Figure 9 This is a schematic diagram of the eighth third opening morphology provided in an embodiment of the present invention;

[0022] Figure 10 This is a schematic diagram of the ninth type of third opening morphology provided in an embodiment of the present invention;

[0023] Figure 11 This is a schematic diagram of the tenth third opening morphology provided in an embodiment of the present invention;

[0024] Figure 12 This is a schematic diagram of the eleventh type of third opening morphology provided in the embodiments of the present invention;

[0025] Figure 13 This is a schematic diagram of the twelfth third opening morphology provided in an embodiment of the present invention;

[0026] Figure 14 This is a schematic diagram of the thirteenth third opening morphology provided in the embodiment of the present invention;

[0027] Figure 15 This is a schematic diagram of the fourteenth third opening morphology provided in an embodiment of the present invention;

[0028] Figure 16 This is a schematic diagram of a display device structure provided in an embodiment of the present invention. Detailed Implementation

[0029] The specific embodiments of a display panel and display device provided by the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] This invention provides a display panel, such as... Figure 1 As shown, it includes: a substrate 100, and an OLED light-emitting layer 200, a reflective layer 300, a light-shielding layer 400 and a color resist layer 500 sequentially stacked on the substrate 100.

[0031] The reflective layer 300 has a first opening K1, and the orthographic projection of the first opening K1 on the substrate 100 overlaps with the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer 200 on the substrate 100.

[0032] The light-shielding layer 400 has a second opening K2. The orthographic projection of the first opening K1 on the substrate 100 is located within the orthographic projection of the second opening K2 on the substrate 100. The second opening K2 is correspondingly disposed with respect to the pixel 201 in the light-emitting area. The color resist layer 500 fills the first opening K1 and the second opening K2. The reflective layer 300 has a sidewall A at the first opening K1. The color resist layer 500 is in contact with the sidewall A. The refractive index of the color resist layer 500 is greater than the refractive index of the reflective layer 300. The material of the reflective layer 300 may be, but is not limited to, an organic insulating material such as polyimide. The material of the color resist layer 500 may be, but is not limited to, a photosensitive organic material.

[0033] The display panel includes a first region Q1 and a second region Q2. The size of the second opening K2 corresponding to the pixels 201 of the same color in the first region Q1 is smaller than the size in the second region Q2. The light-shielding layer 400 has a third opening K3 in the first region Q1. The orthographic projection of the third opening K3 on the substrate 100 does not overlap with the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer 200 on the substrate 100. The third opening K3 and the second opening K2 are independent of each other.

[0034] Thus, by setting a third opening on the light-shielding layer of the first region, the reflectivity of the first region is increased, thereby reducing the difference in reflectivity between the first and second regions and improving the display effect of the display panel. In addition, the orthographic projection of the third opening on the substrate does not overlap with the orthographic projection of the light-emitting area of ​​the OLED light-emitting layer on the substrate, which can reduce light leakage at the third opening and improve the display effect of the display panel.

[0035] Among them, such as Figure 1 As shown, the OLED light-emitting layer 200 includes a plurality of pixels 201. The pixels 201 are located in the light-emitting area of ​​the OLED light-emitting layer 200. When the second opening K2 is set to correspond with the pixels 201 in the light-emitting area, the light emitted by the pixels 201 can be emitted from the second opening K2 to realize the display of the display panel.

[0036] The second opening K2 corresponding to the same color pixel 201 has a smaller size in the first region Q1 than in the second region Q2. This can be understood as follows: Figure 1 As shown, pixel 201 may include a red pixel R, a green pixel G, and a blue pixel B. In one pixel arrangement, the blue pixel G is relatively large, while the red pixel R and the green pixel G are relatively small. Figure 1(Not shown in the image), so the second opening K2 corresponding to the blue pixel B is also larger than that corresponding to the red pixel R and the green pixel G. Therefore, when comparing the size of the second opening K2 in the first region Q1 and the second region Q2, it is necessary to compare the second opening K2 corresponding to the pixels 201 of the same color. Thus, among the multiple second openings K2 corresponding to the red pixel R, the size of the second opening K2 in the first region Q1 is smaller; among the multiple second openings K2 corresponding to the green pixel G, the size of the second opening K2 in the first region Q1 is smaller; and among the multiple second openings K2 corresponding to the blue pixel G, the size of the second opening K2 in the first region Q1 is smaller.

[0037] Furthermore, the size of the second opening can be determined by its orthographic projection onto the substrate. For example, when the orthographic projection of the second opening onto the substrate is a circle, the size of the second opening can be the diameter of the circle; when the orthographic projection of the second opening onto the substrate is a square, the size of the second opening can be the side length of the square. Of course, the shape of the orthographic projection of the second opening onto the substrate is generally determined by the shape of the pixel. The shape of the orthographic projection of the second opening onto the substrate can be set according to actual needs, thereby determining its size, and no specific limitation is made here.

[0038] It should be understood that for display panels of the same size manufactured using the same process, the area where the light-shielding layer edge peels off is fixed. This allows us to determine the positions of the first and second areas, and then improve the display effect of the display panel by setting a third opening in the first area.

[0039] Optionally, such as Figures 2 to 14 As shown, Figures 2 to 14 This is a schematic diagram of the orthographic projection of the second opening K2 and the third opening K3 with different structures in the OLED light-emitting layer onto the substrate 100. The third openings K3 are arranged in a uniform array. In this way, by uniformly distributing the third openings K3 in the first region Q1, the uniformity of reflectivity in the first region Q1 can be improved, thereby improving the display effect of the display panel.

[0040] In the display panel, the third opening in the first area can be set to a variety of different structures. The following is an introduction to several different structures of the third opening.

[0041] 1. The third opening surrounding the second opening.

[0042] like Figures 2 to 11 As shown, a third opening K3 is arranged around at least one second opening K2. For example, a third opening K3 can be arranged around one, two, three, four or more second openings. The specific number of second openings K2 around which a third opening K3 is arranged is not specifically limited here, thereby adjusting the reflectivity of the first region Q1 and improving the display effect of the display panel.

[0043] Optionally, such as Figures 2 to 5 As shown, the third opening K3 is S-shaped and is set around the two adjacent second openings K2.

[0044] Among them, such as Figure 2 and Figure 5 As shown, the third openings K3 are arranged in a row from the bottom left to the top right. Each third opening K3 partially surrounds a second opening K2 corresponding to a red pixel R and a second opening K2 corresponding to a green pixel G, and the two second openings K2 are located on both sides of the third opening K3. Figure 2 and Figure 5 The "S" shape of the third opening K3 in the middle is a mirror image; as Figure 3 and Figure 4 As shown, the third openings K3 are arranged from the upper left to the lower right. Each third opening K3 partially surrounds a second opening K2 corresponding to a red pixel R and a second opening K2 corresponding to a green pixel G, and the two second openings K2 are located on both sides of the third opening K3. Figure 3 and Figure 4 The "S" shape of the third opening K3 in the middle is a mirror image.

[0045] In this way, the reflectivity of the first area can be adjusted by setting an "S"-shaped third opening, thereby improving the display effect of the display panel.

[0046] Of course, the third opening in the "S" shape is not limited to partially enclosing the second opening corresponding to a red pixel and a green pixel. Other forms of the third opening in the "S" shape can also be used. For example, the third opening in the "S" shape can partially enclose the second opening corresponding to a blue pixel and a green pixel. Or the third opening in the "S" shape can be extended into a wavy third opening, thereby partially enclosing more second openings, and each second opening is arranged alternately on both sides of the third opening. The specific form of the third opening in the "S" shape is not limited here.

[0047] Optionally, such as Figures 6 to 11 As shown, the third opening K3 is U-shaped and surrounds the two adjacent second openings K2. Thus, the reflectivity of the first region Q1 can be adjusted by setting the U-shaped third opening K3, thereby improving the display effect of the display panel.

[0048] Furthermore, such as Figure 8 and Figure 11 As shown, the U-shaped openings of the third opening K3 in adjacent columns face opposite directions. In this way, by setting the U-shaped openings of the third opening K3 to face opposite directions, the uniformity of the light-shielding layer openings is improved, thereby improving the uniformity of reflectivity within the first region Q1 and enhancing the display effect of the display panel.

[0049] Specifically, such as Figures 6 to 8 As shown, the third openings K3 are arranged in a row from the bottom left to the top right. Each third opening K3 partially surrounds a second opening K2 corresponding to a blue pixel B and a second opening K2 corresponding to a green pixel G, and both second openings K2 are located on the same side of the third opening K3. Figure 6 The "U"-shaped opening of the third opening K3 is located in the lower left corner. Figure 7 The "U"-shaped opening of the third opening K3 is located in the upper right corner. Figure 8 The "U"-shaped openings of the third opening K3 in adjacent rows are located at the lower left and upper right respectively, meaning the "U"-shaped openings face opposite directions; for example Figures 9 to 11 As shown, the third openings K3 are arranged in rows from the top left to the bottom right. Each third opening K3 partially surrounds a second opening K2 corresponding to a blue pixel B and a second opening K2 corresponding to a green pixel G, and both second openings K2 are located on the same side of the third opening K3. Figure 9 The "U"-shaped opening of the third opening K3 is located in the upper left. Figure 10 The "U"-shaped opening of the third opening K3 is located at the lower right. Figure 8 The "U"-shaped openings of the third opening K3 in the adjacent row are located at the upper left and lower right respectively, that is, the "U"-shaped openings face opposite directions.

[0050] Of course, the third opening of the "U" shape is not limited to partially enclosing the second opening corresponding to a blue pixel and a green pixel. Other forms of the third opening of the "U" shape can also be used. For example, the third opening of the "U" shape can partially enclose the second opening corresponding to a red pixel and a green pixel, or the third opening of the "U" shape can partially enclose one or more second openings. The specific form of the third opening of the "U" shape is not limited here.

[0051] Optionally, such as Figure 12 and Figure 13 As shown, the third opening is in a ring shape, surrounding the two adjacent second openings.

[0052] Among them, such as Figure 12 As shown, the third openings K3 are arranged in a row from the bottom left to the top right, with each third opening K3 surrounding a second opening K2 corresponding to a red pixel R and a second opening K2 corresponding to a green pixel G; as Figure 13 As shown, the third openings K3 are arranged in a row from the top left to the bottom right. Each third opening K3 partially surrounds a second opening K2 corresponding to a red pixel R and a second opening K2 corresponding to a green pixel G.

[0053] In this way, the reflectivity of the first area can be adjusted by setting a third opening around the second opening, thereby improving the display effect of the display panel.

[0054] Of course, the third opening surrounding the second opening is not limited to surrounding the second opening corresponding to a red pixel and a green pixel. Other forms of third openings can also be used. For example, a third opening can surround the second opening corresponding to a blue pixel and a green pixel, or a third opening can surround one or more second openings. The specific form of the third opening surrounding the second opening is not limited here.

[0055] It should be understood that when the third opening is set around the second opening, the specific shape of the third opening is not limited to the several types described above, and can also be other shapes that can surround the second opening, without being specifically limited here.

[0056] 2. The third opening located between the second openings.

[0057] like Figure 14 and Figure 15 As shown, the third opening K3 is located between the adjacent second opening K2. Thus, by setting the third opening K3, the reflectivity of the first region Q1 can be adjusted, improving the display effect of the display panel.

[0058] Optionally, such as Figure 14 As shown, the third opening K3 is X-shaped, or, as... Figure 15 As shown, the third opening K3 is annular. This allows for the creation of third openings with various shapes between the second openings, improving both the display panel's performance and the flexibility of its design.

[0059] Of course, the shape of the third opening set between the second openings is not limited to "X" shape and ring shape, but can be other shapes, which are not specifically limited here.

[0060] It should be understood that, Figures 2 to 15 In the reflective layer, the pixels are arranged in a Diamond pixel arrangement and are all circular in shape. When other pixel arrangements are used in the display panel, such as but not limited to GGRB pixel arrangement, RealRGB pixel arrangement, etc., or when other pixel shapes are used, such as but not limited to square pixels, rhombus pixels, etc., the third opening can be made in the way described above to adjust the reflectivity of the first area, thereby improving the display effect of the display panel.

[0061] In addition, the spacing between the second and third openings, the minimum width of the third opening, and the spacing between adjacent third openings can all be set to be greater than or equal to 3μm. This allows for precise control of the morphology of the third opening during etching, thereby improving the reliability of the display panel.

[0062] Of course, in addition to the two ways mentioned above, where the third opening surrounds the second opening or is located between the second openings, the third opening can also be set in other ways. For example, when the second opening is a ring, the second opening can surround the third opening. The specific setting of the third opening can be selected according to actual needs and is not limited here.

[0063] Optionally, such as Figure 1 As shown, the angle between sidewall A and the first direction is greater than 0°, and sidewall A faces away from the substrate 100. The first direction is perpendicular to the substrate 100. Thus, the angle between sidewall A and the first direction is greater than 0°, and the refractive index of the color resist layer 500 is greater than the refractive index of the reflective layer 300. This increases the proportion of total internal reflection of light emitted from the OLED light-emitting layer 200 at sidewall A, thereby improving the front light efficiency of the display panel and enhancing its display effect.

[0064] Optionally, such as Figure 1 As shown, the OLED light-emitting layer further includes a first electrode 202 and a second electrode 203 located on both sides of the pixel 201. The pixel 201 is an organic electroluminescent device capable of emitting light under the influence of an electrical signal applied to the first electrode 202 and the second electrode 203. The first electrode 202 can be an anode, and the second electrode 203 can be a cathode; alternatively, the first electrode 202 can be a cathode, and the second electrode 203 can be an anode; this is not limited here. Since the second electrode 203 is located on the light-emitting surface of the light-emitting layer 200, it can be made of a transparent conductive material such as indium tin oxide. Alternatively, the first electrode 202 can also include a metal reflective layer, and the second electrode 203 can be a semi-transparent metal film layer, which can be made of materials such as magnesium, silver, or magnesium-silver alloys. Furthermore, the electroluminescent device can include an organic light-emitting layer and an organic functional layer. The organic functional layer can include films such as a hole injection layer, a hole transport layer, a light-emitting layer, an electron transport layer, and an electron injection layer.

[0065] Optionally, such as Figure 1 As shown, the display panel includes an encapsulation layer 600 sandwiched between the OLED light-emitting layer 200 and the reflective layer 300. The encapsulation layer 600 can be made of inorganic or organic film layers well-known to those skilled in the art, and is not limited thereto. In this way, the encapsulation layer 600 can encapsulate each OLED light-emitting layer, preventing moisture and oxygen from penetrating into the interior of the display panel, thereby avoiding damage to the OLED light-emitting layer 200 by moisture and oxygen.

[0066] Optionally, the display panel includes a touch layer sandwiched between the encapsulation layer and the reflective layer. The touch layer may include multiple independent self-capacitance electrodes, using the self-capacitance principle to detect the touch position. Alternatively, the touch layer may include multiple first capacitor electrodes and multiple second capacitor electrodes, using the mutual capacitance principle to detect the touch position. The specific detection method is not specifically limited here. The touch layer can be made of a transparent conductive material, or it can be configured as a metal mesh structure to achieve light transmission. Furthermore, if the touch layer includes opaque metal electrodes, the positions of the metal electrodes must be avoided from light transmission areas to prevent affecting the display and touch performance.

[0067] Based on the same inventive concept, this invention also provides a display device. The implementation principle of the display device is similar to that of the aforementioned display panel. The specific implementation method of the display device can be found in the aforementioned display panel embodiments, and repeated details will not be described again.

[0068] Specifically, an embodiment of the present invention provides a display device, such as... Figure 16 As shown, this includes the display panel 1601 described above. The display devices include, but are not limited to, devices with OLED displays such as televisions, mobile phones, and watches.

[0069] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A display panel, characterized by, The display panel comprises: a substrate, an OLED light-emitting layer, a reflective layer, a light-shielding layer and a color resistance layer being sequentially and laminatedly arranged on the substrate; the reflective layer has a first opening, a normal projection of the first opening on the substrate overlaps a normal projection of a light-emitting area of the OLED light-emitting layer on the substrate; the light-shielding layer has a second opening, a normal projection of the first opening on the substrate is located within a normal projection of the second opening on the substrate, the second opening is arranged corresponding to a pixel in the light-emitting area, the color resistance layer is filled in the first opening and the second opening, the reflective layer has a side wall at the first opening, the color resistance layer is in contact with the side wall, a refractive index of the color resistance layer is greater than a refractive index of the reflective layer; the display panel comprises a first area and a second area, a size of the second opening corresponding to the pixel of the same color in the first area is smaller than a size of the second opening in the second area, the light-shielding layer has a third opening in the first area, a normal projection of the third opening on the substrate does not overlap a normal projection of a light-emitting area of the OLED light-emitting layer on the substrate, the third opening is independent of the second opening.

2. The display panel of claim 1, wherein, The third openings are uniformly arranged in an array.

3. The display panel of claim 2, wherein, One third opening is arranged around at least one second opening.

4. The display panel of claim 3, wherein, The third opening is in an "S" shape, and the third opening is arranged around two adjacent second openings.

5. The display panel of claim 3, wherein, The third opening is in a "U" shape, and the third opening is arranged around two adjacent second openings.

6. The display panel of claim 5, wherein, The "U" shaped openings of the third openings of adjacent columns face in opposite directions.

7. The display panel of claim 3, wherein, The third opening is in a ring shape, and the third opening is arranged around two adjacent second openings.

8. The display panel of claim 2, wherein, The third opening is located between adjacent second openings.

9. The display panel of claim 8, wherein, The third opening is in an "X" shape.

10. The display panel of claim 8, wherein, The third opening is in a ring shape.

11. The display panel of claim 1, wherein, An included angle between the side wall and a first direction is greater than 0°, the side wall faces a direction away from the substrate, and the first direction is a direction perpendicular to the substrate.

12. The display panel of claim 1, wherein, The material of the reflective layer is polyimide.

13. The display panel of any of claims 1-12, wherein, The display panel comprises: an encapsulation layer arranged between the OLED light-emitting layer and the reflective layer.

14. The display panel of claim 13, wherein, The display panel comprises: a touch layer arranged between the encapsulation layer and the reflective layer.

15. A display device, characterized by The display panel comprises any one of claims 1-14.

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