A display panel and display device

Abstract

The application provides a display panel and a display device, the display panel comprising a display area, the display area comprising a normal display area and a device setting area, the device setting area comprising a plurality of first light emitting units and a plurality of first filter groups; the first filter group comprising a first filter structure and a second filter structure; along a first direction Z, a projection of the first filter structure covers the first light emitting unit, and a projection of the second filter structure surrounds the projection of the first filter structure; wherein a filter color of the first filter structure is the same as an out-light color of the corresponding first light emitting unit, and a filter color of the second filter structure is different from the filter color of the first filter structure. The filter group adopts a filter ring structure with one or several different filter colors, which can limit the light emitting unit out-light viewing angle, increase the display contrast, improve the transmittance of external light, thereby reducing the display difference between the normal display area and the device setting area, and improving the display effect of the display panel.

Description

TECHNICAL FIELD

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

[0002] With the increasing demand of screen ratio of display panel, the technology of setting optical devices in the screen is gradually mature, but in the screen area of the optical device, there is still a problem that the display light emitted by the display panel has low transmittance, the external light has low transmittance, and the display effect is poor, which cannot fully meet the application requirements of the display panel. SUMMARY

[0003] The present application provides a display panel and a display device, which uses one or several filter ring structures with different filter colors in the filter assembly in the device setting area, reduces the display difference between the normal display area and the device setting area, and makes the device setting area have display function and high transmittance to external ambient light.

[0004] In a first aspect, embodiments of the present application provide a display panel, comprising a display area, the display area comprising a normal display area and a device setting area, the normal display area at least partially surrounding the device setting area.

[0005] The device setting area comprises a plurality of first light emitting units and a plurality of first filter groups, at least part of the first filter groups are located on the light emitting side of the first light emitting units.

[0006] The first filter group comprises a first filter structure and a second filter structure.

[0007] In the first direction, the projection of the first filter structure covers the first light emitting unit, and the projection of the second filter structure surrounds the projection of the first filter structure; wherein the filter color of the first filter structure is the same as the light emitting color of the corresponding first light emitting unit, and the filter color of the second filter structure is different from the filter color of the first filter structure; the first direction is the direction perpendicular to the plane where the display panel is located.

[0008] In a second aspect, embodiments of the present application also provide a display device, comprising the display panel provided in the first aspect.

[0009] The display panel provided in this invention, by reasonably setting the filter group on the light-emitting side of the light-emitting unit in the device setting area, and setting a central filter structure corresponding to the light-emitting color of the light-emitting unit, and then using one or more filter structures of different filter colors around the central filter structure to form a ring filter structure surrounding the pixel opening of the non-same-color light-emitting unit, can both limit the light-emitting angle of the light-emitting unit and increase the display contrast, and also allow some external light to pass through, thereby improving the light-sensing performance of the photosensitive device in the device setting area, thus reducing the display difference between the normal display area and the device setting area. Without affecting the display viewing angle characteristics, the device setting area of ​​the display panel obtained in this application takes into account the display function and has a high transmittance to external ambient light, thus improving the display effect of the display panel. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a planar structure of a display panel provided in an embodiment of the present invention;

[0011] Figure 2 yes Figure 1 A schematic diagram of a portion of the film layer structure of a display panel in the M region;

[0012] Figure 3 yes Figure 1 A cross-sectional schematic diagram of a display panel along the BB' direction;

[0013] Figure 4 yes Figure 1 A cross-sectional schematic diagram of another type of display panel along the BB' direction;

[0014] Figure 5 yes Figure 2 A planar schematic diagram of the filter groups corresponding to the light-emitting units with the same light-emitting color in different display areas;

[0015] Figure 6 yes Figure 1 A cross-sectional schematic diagram of another type of display panel along the BB' direction;

[0016] Figure 7 yes Figure 1 A cross-sectional schematic diagram of another type of display panel along the BB' direction;

[0017] Figure 8 yes Figure 1 A schematic diagram of a portion of the film layer structure of a display panel in the M region;

[0018] Figure 9 yes Figure 1 A cross-sectional schematic diagram of another type of display panel along the BB' direction;

[0019] Figure 10 is Figure 8 is a plan view of a filter group corresponding to a same light-emitting color of a light-emitting unit in different display areas in the display panel;

[0020] Figure 11 is a schematic diagram of a display panel light-emitting spectrum and a filter structure transmission spectrum provided by an embodiment of the present application;

[0021] Figure 12 is a structural schematic diagram of a display device provided by an embodiment of the present application. DETAILED DESCRIPTION

[0022] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are merely intended to explain the present application, but not to limit the present application. In addition, it should be noted that, for the convenience of description, only the parts related to the present application are shown in the accompanying drawings, but not all the structures.

[0023] The display panel provided by the embodiment of the present application comprises a display area, the display area comprises a normal display area and a device setting area, the normal display area at least partially surrounds the device setting area; the device setting area comprises a plurality of first light-emitting units and a plurality of first filter groups, at least part of the first filter groups are located on the light-emitting side of the first light-emitting units; the first filter group comprises a first filter structure and a second filter structure; along a first direction Z, the projection of the first filter structure covers the projection of the first light-emitting unit, and the projection of the second filter structure surrounds the projection of the first filter structure; wherein the filter color of the first filter structure is the same as the light-emitting color of the corresponding first light-emitting unit, and the filter color of the second filter structure is different from the filter color of the first filter structure. The first direction Z is a direction perpendicular to the plane where the display panel is located.

[0024] By adopting the above technical solution, by reasonably setting the filter group on the light-emitting side of the light-emitting unit of the device setting area, the central filter structure corresponding to the light-emitting color of the light-emitting unit is set according to the light-emitting color of the light-emitting unit, and then the filter structure of one or several different filter colors is used to surround the central filter structure to form a ring-shaped filter structure surrounding the pixel opening of the non-heterochromatic light-emitting unit, which can not only limit the light-emitting viewing angle of the light-emitting unit, but also can transmit part of the external light, thereby improving the photosensitive performance of the photosensitive device in the device setting area. Without affecting the display viewing angle characteristics, the device setting area of the display panel obtained by the present application takes into account the display function while having high transmittance to the external ambient light.

[0025] The above is the core idea of the present application. The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the accompanying drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Figure 1 is a schematic diagram of a planar structure of a display panel provided by an embodiment of the present application; Figure 2 is Figure 1 is a schematic diagram of a partial film layer structure of a display panel in the M region; Figure 3 is Figure 1 is a schematic diagram of a cross section of a display panel in the direction of BB'; Figure 4 is Figure 1 is a schematic diagram of a cross section of another display panel in the direction of BB' in the M region. In combination with Figures 1-4 , it is shown that the display panel 200 provided by the embodiment of the present application includes a display area AA, the display area AA includes a normal display area A1 and a device setting area A2, the normal display area A1 at least partially surrounds the device setting area A2; the device setting area A2 includes a plurality of first light emitting units 20 and a plurality of first light filtering groups 30, at least part of the first light filtering groups 30 are located on the light emitting side of the first light emitting units 20; the first light filtering group 30 includes a first light filtering structure 31 and a second light filtering structure 32; along the first direction Z, the projection of the first light filtering structure 31 covers the first light emitting unit 20, the projection of the second light filtering structure 32 surrounds the projection of the first light filtering structure 31, the projection of the second light filtering structure 32 is connected with or partially overlaps with the projection of the first light filtering structure 31; wherein the light filtering color of the first light filtering structure 31 is the same as the light emitting color of the corresponding first light emitting unit 20, and the light filtering color of the second light filtering structure 32 is different from the light filtering color of the first light filtering structure 31. The first direction Z is the direction perpendicular to the plane where the display panel is located.

[0027] Specifically, the display panel 200 includes an organic light emitting diode display (OLED), a light emitting diode display (LED), a liquid crystal display (LCD), etc. The type of the display panel 200 is not specifically limited in the embodiments of the present application. The normal display area A1 of the display panel 200 is used for normal display of images. The device setting area A2 includes a light emitting area and a light transmission area. The light emitting area is provided with a plurality of first light emitting units 20 for displaying images. The light transmission area can transmit external light into the display panel. For example, the device setting area A2 is a camera under panel (CUP) setting area. A camera or other light sensitive component is arranged under the panel in the area, so that the device setting area A2 has both display and light transmission functions. The device setting area A2 and the normal display area A1 together form a display area AA of the display panel.

[0028] Generally, the normal display area A1 and the device setting area A2 are both provided with light emitting units, and a light filter group is arranged on the light emitting side of the light emitting units to improve display contrast. The difference is that the size, number, arrangement density and other parameters of the light emitting units in the device setting area A2 are different from those of the light emitting units in the normal display area A1. The structure of the light filter group on the light emitting side of the light emitting units in the device setting area A2 is adjusted to improve the contrast of the light emitted by the device setting area A2 and increase the light transmission rate of external ambient light.

[0029] Specifically, in combination with Figures 2-4 As shown in FIG. 1, the device setting area A2 is provided with a plurality of first light emitting units 20. For example, the first light emitting unit 20 can be any one of a red light emitting unit R, a green light emitting unit G and a blue light emitting unit B. According to the color of the light emitted by the first light emitting unit 20, a first light filter group 30 is arranged on the light emitting side of the first light emitting unit 20. The first light filter group 30 includes a first light filter structure 31 and at least one first light filter structure 32 surrounding the first light filter structure 31, thereby forming a structure in which at least two light filter layers are nested and surrounded. In the Z direction, the projection of the first light filter structure 31 covers the first light emitting unit 20. The light filter color of the first light filter structure 31 corresponds to the light emitting color of the first light emitting unit 20. The first light filter structure 31 is a central light filter structure, such as a red light filter structure R, a green light filter structure G and a blue light filter structure B. Through this arrangement, only light with the same color as the first light filter structure 31 can be transmitted.

[0030] A feasible implementation manner is as follows: Figure 3As shown, a second filter structure 32 is arranged around the first filter structure 31 with the first filter structure 31 as the center, the filter color of the second filter structure 32 is different from the light emitting color of the first light emitting unit 20, and along the Z direction in the figure, the projection of the second filter structure 32 is partially overlapped with the projection of the first filter structure 31.

[0031] A feasible implementation manner is as follows: Figure 4 As shown, a second filter structure 32 is arranged around the first filter structure 31 with the first filter structure 31 as the center, the filter color of the second filter structure 32 is different from the light emitting color of the first light emitting unit 20, and along the Z direction in the figure, the projection of the second filter structure 32 is partially overlapped with the projection of the first filter structure 31.

[0032] In combination with Figures 2-3 As shown, a black light shielding material 203 is arranged between two adjacent second filter groups 50 in the normal display area A1, the projection of the second filter structure 32 along the Z direction surrounds the first light emitting unit 20, and the annular filter structure is adopted, which can absorb the oblique angle light emitted by the first light emitting unit 20 and block the large angle light, thereby improving the light emitting purity of the first light emitting unit 20 and increasing the display contrast of the display panel; on the other hand, the second filter structure 32 can also transmit part of the external ambient light S into the display panel, thereby improving the transmittance of the external light of the device setting area A2, which is conducive to the photosensitive imaging of the photosensitive device in the area, thereby comprehensively improving the imaging effect of the display panel.

[0033] It should be noted that in combination with Figure 4 , Figure 3 As shown, the display panel further includes other film layers, such as a substrate 201 and a driving circuit layer 202, etc. The substrate 201 can be a rigid material such as glass or silicon wafer, or a flexible material such as ultra-thin glass, metal foil or polymer plastic material, etc. The driving circuit layer 202 can include a plurality of thin film transistors (TFT), storage capacitors and metal traces, etc. The driving circuit layer 202 is used to provide a driving voltage to the light emitting unit to drive the light emitting unit to emit light, and the plurality of film layers jointly realize the normal display of the display panel, which will not be enumerated one by one here.

[0034] In summary, the display panel provided by the embodiment of the present application sets the light filtering group on the light emitting side of the light emitting unit in the device setting area in a reasonable manner, sets the central light filtering structure corresponding to the light emitting color of the light emitting unit, and surrounds the central light filtering structure with one or more light filtering structures having different filtering colors from the central light filtering structure, thereby forming a plurality of light filtering ring-shaped surrounding non-uniform light emitting units. The display panel can limit the light emitting viewing angle of the light emitting unit, increase the display contrast, and also allow part of the external light to pass through, thereby improving the photosensitive performance of the photosensitive device in the device setting area, reducing the display difference between the normal display area and the device setting area, and improving the display function of the device setting area of the display panel without affecting the display viewing angle characteristics.

[0035] Figure 5 is Figure 2 the plan view of the light filtering group corresponding to the light emitting unit with the same light emitting color in the different display areas in the embodiment, wherein Figure 5 (a) is the plan view of one second light filtering group in the normal display area in the embodiment, Figure 5 (b) is the plan view of one first light filtering group in the normal display area in the embodiment. Based on the above embodiment, as shown in Figures 2-5 , the normal display area A1 includes a plurality of second light emitting units 40 and a plurality of second light filtering groups 50, and the second light filtering group 50 is located on the light emitting side of the second light emitting unit 40; the display panel 200 further includes a pixel limiting layer 60, the pixel limiting layer 60 includes a plurality of first pixel openings 61 and a plurality of second pixel openings 62, the first light emitting unit 20 is located in the first pixel opening 61, and the second light emitting unit 40 is located in the second pixel opening 62; the length b0 of the second pixel opening 62 along the second radial direction X is greater than the length a0 of the first pixel opening 61 with the same light emitting color along the first radial direction X. The second light filtering structure 32 includes a first opening D1, and the first light filtering structure 31 is located in the first opening D1; the display panel 200 further includes a light shielding layer 203, the light shielding layer 203 is located on the light emitting side of the second light emitting unit 40, the light shielding layer 203 includes a second opening D2, the second light filtering group 50 includes a third light filtering structure 53, and the third light filtering structure 53 is located in the second opening D2; along the first direction Z, the non-overlapping area of the projection of the first opening D1 and the first pixel opening 61 corresponding thereto is a first sub-filtering area 310, and the non-overlapping area of the projection of the second opening D2 and the second pixel opening 62 corresponding thereto is a second sub-filtering area 530; the width a1 of the first sub-filtering area 310 along the second radial direction X is greater than the width b1 of the second sub-filtering area 530 along the first radial direction X.

[0036] It should be noted that in the embodiments of the present application, the first radial direction and the second radial direction are taken as the X direction in the figure as an example, and the first radial direction and the second radial direction can also be the Y direction in the figure. The first radial direction is a direction from the center of the first pixel opening to the edge of the first pixel opening, and the second radial direction is a direction from the center of the second pixel opening to the edge of the second pixel opening. The first radial direction and the second radial direction are parallel, and both are parallel to the plane on which the display panel is located. Here, no specific limitation is made. The shape of the projection of the light emitting unit in the Z direction in the present application can be a rectangle, a circle or other shapes, which can be set according to the light emitting requirements of the display panel. Here, no specific display is made, and the circular projection is taken as an example for description in the present application. Correspondingly, the shape of the projection of the light filtering group on the light emitting side of the light emitting unit in the Z direction is circular, thereby being conducive to improving the light emitting rate and contrast of the light emitting unit.

[0037] Specifically, in combination with FIGS. 1 and 2, Figure 3 and Figure 4 Taking the display panel 200 as an organic light emitting display panel (OLED) and the light emitting unit as an organic light emitting diode as an example, the display panel 200 further includes a pixel definition layer 60 located on the side of the driving circuit layer 202 away from the substrate 201, for defining the pixel size and position of the light emitting unit and the like, and can prevent or reduce color mixing between pixels. Optionally, the material of the pixel definition layer 60 can include at least one of polyimide, polyamide, acrylic resin, cyclobutene and phenolic resin and the like organic insulating materials; the pixel definition layer 60 can further include at least one of SiO2, SiNx, Al2O3, CuOx, Tb4O7, Y2O3, Nb2O5 and Pr2O3 and the like inorganic insulating materials; or the pixel definition layer 114 can also have a multi-layer structure formed by alternately arranging the organic insulating material and the inorganic insulating material.

[0038] In combination with FIGS. 1 and 2, Figure 3 Figure 4 A plurality of first pixel openings 61 and a plurality of second pixel openings 62 are formed in the pixel definition layer 60, the first pixel openings 61 are used to define the size of the first light emitting unit 20 and the like, and the second pixel openings 62 are used to define the size of the second light emitting unit 50 and the like. In one possible implementation, the pixel definition layer 60 in the device setting area 2 can be removed to form a structure locally surrounding the second light emitting unit 50, or a transparent insulating material is used as the pixel definition layer 60 in the device setting area 2, thereby improving the light transmittance of the device setting area 2 to the external ambient light S.

[0039] In the case of not affecting the display effect, the size of the first pixel opening 61 in the device setting area A2 can also be compressed relative to the second pixel opening 62 in the normal display area A1, so as to reduce the light-emitting area of the first light-emitting unit 20 and improve the light-transmitting area of the pixel defining layer 60. Taking the first pixel opening 61 and the second pixel opening 62 with the same light-emitting color as an example, the length b0 of the second pixel opening 62 along the X direction in the drawing is greater than the length a0 of the first pixel opening 61 with the same light-emitting color.

[0040] The second filter structure 32 includes a first opening D1 for defining the filter size and position and other parameters of the first filter structure 31. The display panel 200 further includes a light shielding layer 203 made of a black light shielding material, which is located on the light-emitting side of the second light-emitting unit 40 and includes a plurality of second openings D2 for defining the filter size and position and other parameters of the third filter structure 53, so as to prevent or reduce color mixing between pixels.

[0041] In combination with Figure 3 and Figure 4 As shown, the projection of the first filter structure 31 along the Z direction covers the first pixel opening 61, the first filter structure 31 intersects or partially overlaps with the second filter structure 32, the projection of the second filter structure 32 along the Z direction covers the second pixel opening 62, and the second filter structure 32 intersects or partially overlaps with the light shielding layer 203. In order to improve the parameter accuracy of the filter structure, the non-overlapping area of the projection of the first opening D1 along the Z direction and the corresponding first pixel opening 61 is defined as a first sub-filter area 310, the non-overlapping area of the projection of the second opening D2 along the Z direction and the second pixel opening 62 is defined as a second sub-filter area 530, and the width a1 of the first sub-filter area 310 along the X direction is greater than the width b1 of the second sub-filter area 530 along the X direction. By increasing the size of the first filter structure 31, the light-emitting efficiency of the oblique viewing angle light rays emitted in the first pixel opening 61 is improved, and the difference between the normal display area A1 and the device setting area A2 is reduced, so as to balance the light-emitting brightness of the display area.

[0042] On the basis of the above embodiment, in combination with Figures 2-5 As shown, the width a2 of the second filter structure 32 along the first radial direction X is greater than the length a0 of the first pixel opening 61 along the first radial direction X.

[0043] Specifically, in combination with Figure 2 and Figure 4 As shown, a2>a0, the second filter structure 32 absorbs the light rays in the θ1 viewing angle range emitted by the first pixel opening 61, which is conducive to improving the light-emitting purity of the first light-emitting unit 20 and increasing the display contrast of the device setting area.

[0044] Figure 6 isFigure 1 a cross-sectional view of another display panel along the direction of BB’, Figure 7 is Figure 1 a cross-sectional view of another display panel along the direction of BB’. Based on the above embodiment, in combination with Figure 6 and Figure 7 As shown in the figure, the first light emitting unit 20 includes a first alpha light emitting unit 21 and a first beta light emitting unit 22; the first pixel opening 61 includes a first alpha pixel opening 611 and a first beta pixel opening 612; the first alpha light emitting unit 21 is located in the first alpha pixel opening 611, and the first beta light emitting unit 22 is located in the first beta pixel opening 612; the length a 01 of the first alpha pixel opening 611 along the X direction in the figure is greater than the length a 02 of the first beta pixel opening 612 along the X direction in the figure. The first filter group 30 includes a first alpha filter group 33 and a first beta filter group 34; the first alpha filter group 33 includes a first alpha filter structure 331 and a second alpha filter structure 332, the second alpha filter structure 332 includes a first alpha opening D3, and the first alpha filter structure 331 is located in the first alpha opening D3; the first beta filter group 34 includes a first beta filter structure 341 and a second beta filter structure 342, the second beta filter structure 342 includes a first beta opening D4, and the first beta filter structure 341 is located in the first beta opening D4; along the first direction Z, the projection of the first alpha filter structure 331 covers the first alpha pixel opening 611, and the non-overlapping area of the projection of the first alpha filter structure 331 and the first alpha pixel opening 611 is a first alpha filter area 330; the projection of the first beta filter structure 341 covers the first beta pixel opening 612, and the non-overlapping area of the projection of the first beta filter structure 341 and the first beta pixel opening 612 is a first beta filter area 340; the width a 11 of the first alpha filter area 330 along the first radial direction X is greater than the width a 12 of the first beta filter area 340 along the X direction in the figure.

[0045] Specifically, in combination with Figure 6As shown, the first light emitting unit 20 in the device setting area A2 includes a red light emitting unit R, a green light emitting unit G and a blue light emitting unit B. Due to the different light emitting efficiencies of the light emitting units, the sizes of the first light emitting units 20 of different light emitting colors are different, and there are first alpha light emitting units 21 and first beta light emitting units 22 of different light emitting colors, for example, red light emitting units R and green light emitting units G respectively. In a feasible implementation, a first alpha filter structure 331 of red filter and a second alpha filter structure 332 of non-red filter are arranged on the light emitting side of the red light emitting unit R, the second alpha filter structure 332 has a first alpha opening D3, and the first alpha filter structure 331 is nested in the first alpha opening D3. For example, the second alpha filter structure 332 is a blue filter structure or a green filter structure. The first alpha pixel opening 611 is used to define the size and position of the first alpha light emitting unit 21 and other parameters, and the non-overlapping area of the projection of the first alpha opening D3 along the first direction Z and the first alpha pixel opening 611 is the first alpha filter area 330. A first beta filter structure 341 of green filter and a first beta filter structure 341 of non-green filter are arranged on the light emitting side of the green light emitting unit G. For example, the first beta filter structure 341 is a red filter structure or a blue filter structure. The first beta pixel opening 612 is used to define the size and position of the first beta light emitting unit 22 and other parameters, and the non-overlapping area of the projection of the first beta opening D4 along the first direction Z and the first beta pixel opening 612 is the first beta filter area 340. As shown in the figure, Figure 6 As shown, the width a 01 of the red light emitting unit R along the X direction is different from the width a 02 of the green light emitting unit G along the X direction, a 01 > a 02 . Correspondingly, the width a 11 of the first alpha filter area 330 along the X direction in the figure is different from the width a 12 of the first beta filter area 340 along the X direction in the figure, and a 11 > a 12 . Through this setting, it is beneficial to synchronously improve the light emitting efficiency of the oblique view angle light rays emitted by the first alpha light emitting unit 21 and the first beta light emitting unit 22 of different light emitting colors.

[0046] It should be noted that Figure 6 only the first alpha filter structure 331 and the second alpha filter structure 332 are connected, and the first beta filter structure 341 and the first beta filter structure 341 are connected, as an example for description.

[0047] By analogy, Figure 7As shown, the first light emitting unit 20 further comprises a first C light emitting unit 23, the first pixel opening 61 further comprises a first C pixel opening 613, the first C light emitting unit 23 is located in the first C pixel opening 613, the first light filter group 30 further comprises a first C light filter group 35, the first C light filter group 35 further comprises a first C light filter structure 351 and a second C light filter structure 352, the first C light filter structure 351 comprises a first C opening D5, and the first C light filter structure 351 is located in the first C opening D5. Along the first direction Z, the projection of the first C light filter structure 351 covers the first C light emitting unit 23, and the projection of the first C opening D5 and the non-overlapping area of the first C light emitting unit 23 are the first C light filter area 350. For the blue light emitting element B, the red light emitting unit R and the green light emitting unit G with different pixel opening sizes, a 03 >a 01 >a 02 The pixel light filter ring is differentially set, and a 13 >a 11 >a 12 , wherein a 03 is the width of the third light emitting unit 23 (blue light emitting element B) along the X direction in the drawing, a 13 is the width of the first C light filter area 350 along the X direction in the drawing a 13 . Through this setting, it is beneficial to synchronously improve the light emitting efficiency of the oblique view angle light rays emitted by the first A light emitting unit 21, the first B light emitting unit 22 and the first C light emitting unit 23 of different light emitting colors, thereby improving the display brightness of the device setting area A2.

[0048] It should be noted that, Figure 7 In the above embodiment, only the first A light filter structure 331 and the second A light filter structure 332 are connected, the first B light filter structure 341 and the first B light filter structure 341 are connected, and the first C light filter structure 351 and the second C light filter structure 352 are connected. It is described as an example.

[0049] On the basis of the above embodiment, continue to combine Figure 6 As shown, the width a 21 of the second A light filter structure 332 along the first radial direction X is greater than the width a 22 of the second B light filter structure 342 along the X direction in the drawing.

[0050] Specifically, the filter groups corresponding to the first alpha light emitting unit 21 and the first beta light emitting unit 22 are both composed of a center filter structure and a filter ring structure of another color. The projection of the second alpha filter structure 332 corresponding to the first alpha light emitting unit 21 is arranged around the projection of the first alpha filter structure 331, and the projection of the second beta filter structure 342 corresponding to the first beta light emitting unit 22 is arranged around the projection of the first beta filter structure 341. According to the size difference of the red light emitting unit R and the green light emitting unit G, the width a of the second alpha filter structure 332 along the X direction in the figure is greater than the width a of the second beta filter structure 342 along the X direction in the figure. 21 The width a of the second alpha filter structure 332 along the X direction in the figure is greater than the width a of the second beta filter structure 342 along the X direction in the figure. 22 .

[0051] By analogy, continue to combine Figure 7 As shown, along the first direction Z, the projection of the second gamma filter structure 352 is arranged around the projection of the first gamma filter structure 351. For the blue light emitting element B, the red light emitting unit R and the green light emitting unit G with different pixel opening sizes, a 03 > a 01 > a 02 The pixel filter ring is set differently, and a 23 > a 21 > a 22 . Wherein, a 23 is the width a of the second gamma filter structure 352 along the X direction in the figure 23 . Through this setting, it is beneficial to the absorption of light in the θ2 viewing angle range of the first alpha pixel opening 611 by the second alpha filter structure 332, and it is beneficial to improve the light purity of the first alpha light emitting unit 21. Through the absorption of light in the θ3 viewing angle range of the first beta pixel opening 612 by the second beta filter structure 342, it is beneficial to improve the light purity of the first beta light emitting unit 22. Through the absorption of light in the θ4 viewing angle range of the first gamma pixel opening 613 by the second gamma filter structure 352, it is beneficial to improve the light purity of the first gamma light emitting unit 23, thereby increasing the display contrast of the device setting area.

[0052] Figure 8 is Figure 1 is a partial film layer structure diagram of a display panel in M area; Figure 9 is Figure 1 is a cross-sectional schematic view of another display panel along the BB' direction in M area; Figure 10 is Figure 8 is a plan view of a filter group corresponding to a light emitting unit of the same light emitting color in different display areas in M area. Wherein, Figure 10 (a) is a plan view of a second filter group in a normal display area in M area, Figure 10 (b) is a plan view of a first filter group in a normal display area in M area. Based on the above embodiment, combined withFigures 8-10 As shown, the first filter group 30 further comprises a fourth filter structure 35; along the first direction Z, the projection of the fourth filter structure 35 surrounds the projection of the second filter structure 32, the projection of the fourth filter structure 35 and the projection of the second filter structure 32 are connected or partially overlapped, and the filter color of the fourth filter structure 35 is different from the filter color of the first filter structure 31 and the filter color of the second filter structure 32.

[0053] Specifically, in combination with Figures 8-10 As shown, the first filter group 30 can adopt filter structures of two different filter colors to surround the central filter structure, and the projection of the fourth filter structure 35 along the Z direction in the figure surrounds the projection of the second filter structure 32. A feasible implementation manner is as follows Figure 9 As shown, the projection of the fourth filter structure 35 and the projection of the second filter structure 32 are connected; in a feasible implementation manner, the fourth filter structure and the second filter structure 32 are partially overlapped. At the same time, the filter color of the fourth filter structure 35 is different from the filter color of the first filter structure 31 and the filter color of the second filter structure 32. The fourth filter structure 35 is adopted to further absorb the light in the oblique viewing angle range emitted by the first light emitting unit 20, improve the light emission purity and display contrast; at the same time, the fourth filter structure 35 can also partially transmit external light S2, improve the light transmittance of the device setting area A.

[0054] On the basis of the above embodiment, further referring to Figure 9 As shown, the width a3 of the fourth filter structure 35 along the X direction in the figure is greater than the length a0 of the first pixel opening 61 along the X direction in the figure.

[0055] Specifically, by setting a3>a0, it is beneficial to absorb the light in the θ5 viewing angle range emitted by the first pixel opening 61 by the fourth filter structure 35, block the large viewing angle light of the first light emitting unit 20, further improve the light emission purity of the first light emitting unit 20, and increase the display contrast of the device setting area.

[0056] On the basis of the above embodiment, further referring to Figure 9 and Figure 10 As shown, the width a3 of the fourth filter structure 35 along the X direction in the figure is greater than the width a2 of the second filter structure 32 along the X direction in the figure.

[0057] Specifically, in order to ensure that the filter ring of multiple filter colors blocks the oblique viewing angle light of the first light emitting unit 20, by reasonably setting a3>a2>a0, it is beneficial to absorb the light in a specific viewing angle range emitted by the first pixel opening 61 by the fourth filter structure 35 and the second filter structure 32, improve the light emission purity of the first light emitting unit 20, and increase the display contrast of the device setting area, while taking into account the light transmittance of the device setting area A.

[0058] On the basis of the above-mentioned embodiments, continue to combine Figures 7-10 As shown, in the same first filter group 30, the transmittance T1 of the second filter structure 32 to the light emitted by the first light emitting unit 20 is greater than the transmittance T2 of the fourth filter structure 35 to the light emitted by the first light emitting unit 20.

[0059] Specifically, considering that the opening area of the first pixel opening 61 in the device setting area A2 is generally smaller than the opening area of the second pixel opening 62 in the normal display area A1, when the occlusion at the oblique angle is generated, the luminance in the device setting area A2 decreases faster than that in the normal display area A1, which may lead to visibility. Therefore, the transmittance T1 of the second filter structure 32 (inner ring) to the light emitted by the first light emitting unit 20 in the same first filter group 30 can be greater than the transmittance T2 of the fourth filter structure 35 (outer ring) to the light emitted by the first light emitting unit 20, and by reasonably selecting the materials and transmittances of the second filter structure 32 and the fourth filter structure 35, the difference in luminance change between the device setting area A2 and the normal display area A1 can be improved, which is beneficial to the luminance uniformity of the entire display area AA.

[0060] Figure 11 is a display panel light emitting spectrum and filter structure transmittance spectrum overlap schematic diagram provided by an embodiment of the present application. In which Figure 11 The horizontal coordinate in the diagram is wavelength, in nm; Figure 11 The left vertical coordinate in the diagram is light intensity, and the right vertical coordinate is transmittance. Figure 11 Taking an OLED display panel as an example, different filter colors of CF rings are selected according to the overlapping degree of the OLED light emitting spectrum and the filter structure (CF) transmittance spectrum.

[0061] A feasible implementation, combine Figure 11As shown in Table 1, the filter structure with small filter band overlap can be selected, i.e. G-B-R, B-G-R, R-G-B from inside to outside in the same first filter group 30. Among them, G-B-R means that the first light emitting unit 20 is a green light emitting unit OLED-G, the first filter structure 31 adopts a green filter structure CF-G, the second filter structure 32 adopts a blue filter structure CF-B, and the fourth filter structure 35 adopts a red filter structure CF-R; B-G-R means that the first light emitting unit 20 is a blue light emitting unit OLED-B, the first filter structure 31 adopts a blue filter structure CF-B, the second filter structure 32 adopts a green filter structure CF-G, and the fourth filter structure 35 adopts a red filter structure CF-R; R-G-B means that the first light emitting unit 20 is a red light emitting unit OLED-R, the first filter structure 31 adopts a red filter structure CF-R, the second filter structure 32 adopts a green filter structure CF-G, and the fourth filter structure 35 adopts a blue filter structure CF-B. The structure of more filter groups is not shown here.

[0062] Table 1 is the selection relationship of the light emitting unit and the CF ring

[0063] OLED - Light emitting unit Second filter structure - CF ring OLED - B CF - R OLED - G CF - R OLED - R CF - B, CF - G

[0064] Optionally, the first filter structure 31 is a green filter structure CF-G or a blue filter structure CF-B, and the second filter structure 32 is a red filter structure CF-R. According to the light emitting color of the first light emitting unit 20, when the first filter structure 31 is a green filter structure CF-G or a blue filter structure CF-B, the second filter structure 32 selects a red filter structure CF-R with the smallest filter band overlap, i.e. the lowest transmittance of green light and blue light, so as to absorb the green or blue light emitted by the first light emitting unit 20 through the red filter structure CF-R, improve the display contrast of the device setting area A2, and also improve the transmittance of the red light of the external light and the photosensitive performance of the photosensitive device to red light. Similarly, when the first filter structure 31 is a red filter structure CF-R, the second filter structure 32 can be a green filter structure CF-G or a blue filter structure CF-B.

[0065] A feasible implementation, continue to combine Figure 11 As shown in Table 1, the CF ring selection can also be determined according to the transmittance requirement of the RGB band. For example, the first filter structure 31 is a red filter structure CF-R or a blue filter structure CF-B, and when the device setting area A2 has insufficient transmittance of the external environment blue light, the second filter structure 32 can adopt a blue filter structure CF-B to improve the transmittance of the external environment blue light.

[0066] On the basis of the above embodiment, continue to refer to Figures 8-10As shown, the sum of the transmittance T1 of the second filter structure 32 to the light emitted by the first light emitting unit 20 and the transmittance T2 of the fourth filter structure 35 to the light emitted by the first light emitting unit 20 is less than the transmittance T0 of the first filter structure 31 to the light emitted by the first light emitting unit 20.

[0067] Specifically, in combination with Figures 8-10 As shown, T1+T2 < T0 is further provided, that is, the sum of the transmittances of the filter rings of different filter colors in the same first filter group 30 is less than the transmittance of the center filter structure, which can not only ensure the luminance of the light emitted by the first light emitting unit 20 at the normal viewing angle, but also suppress the light emitted at the oblique viewing angle, improve the light emission purity, and thus improve the difference in luminance between the device setting area A2 and the normal display area A1, and uniform the luminance of the light emitted by the entire display area AA.

[0068] Further, optionally, in combination with Figures 2-6 As shown, the transmittance of the second filter structure 32 to the light emitted by the first light emitting unit 20 is less than the transmittance of the first filter structure 31 to the light emitted by the first light emitting unit 20, so as to improve the light emission purity of the first light emitting unit 20.

[0069] Based on the same inventive concept, the present application also provides a display device. Figure 12 A structural schematic diagram of a display device provided by the present application is shown. In combination with Figure 12 As shown, the display device includes any one of the display panels 200 provided by the above embodiments. Therefore, the display device also has the beneficial effects of the display panel 200 in the above embodiments, and the same parts can be understood with reference to the above explanation and description of the display panel 200, which will not be repeated hereinafter.

[0070] The display device 300 provided by the present application can be Figure 12 As shown, the mobile phone can also be any electronic product with display function, including but not limited to the following categories: television, notebook computer, desktop display, tablet computer, digital camera, smart bracelet, smart glasses, vehicle-mounted display, industrial control equipment, medical display screen, touch interactive terminal, etc., and the present application is not specially limited to this.

[0071] Note that the above is only the preferred embodiment of the present application and the technical principle applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the appended claims.

Claims

1. A display panel, characterized by, The display panel comprises a display area, the display area comprises a normal display area and a device setting area, the normal display area at least partially surrounds the device setting area; The device setting area comprises a plurality of first light emitting units and a plurality of first filter groups, at least part of the first filter groups are located on the light emitting side of the first light emitting units; The first filter group comprises a first filter structure and a second filter structure; along a first direction, the projection of the first filter structure covers the first light emitting unit, and the projection of the second filter structure surrounds the projection of the first filter structure; wherein the filter color of the first filter structure is the same as the light emitting color of the corresponding first light emitting unit, and the filter color of the second filter structure is different from the filter color of the first filter structure; the first direction is a direction perpendicular to the plane where the display panel is located; The display panel further comprises a pixel definition layer, the pixel definition layer comprises a plurality of first pixel openings, and the first light emitting unit is located in the first pixel opening; The width of the second filter structure along a first radial direction is greater than the length of the first pixel opening along the first radial direction; wherein the first radial direction is a direction pointing from the center of the first pixel opening to the edge of the first pixel opening.

2. The display panel of claim 1, wherein, The normal display area comprises a plurality of second light emitting units and a plurality of second filter groups, the second filter groups are located on the light emitting side of the second light emitting units; the pixel definition layer further comprises a plurality of second pixel openings, and the second light emitting units are located in the second pixel openings; The length of the second pixel opening along a second radial direction is greater than the length of the first pixel opening with the same light emitting color along a first radial direction; wherein the second radial direction is a direction pointing from the center of the second pixel opening to the edge of the second pixel opening, and the first radial direction and the second radial direction are parallel; The second filter structure comprises a first opening, and the first filter structure is located in the first opening; The display panel further comprises a light shielding layer, the light shielding layer is located on the light emitting side of the second light emitting unit, the light shielding layer comprises a second opening, the second filter group comprises a third filter structure, and the third filter structure is located in the second opening; Along the first direction, the non-overlapping area of the projection of the first opening and the corresponding first pixel opening is a first sub-filter area, and the non-overlapping area of the projection of the second opening and the corresponding second pixel opening is a second sub-filter area; Along the first radial direction, the width of the first sub-filter area is greater than the width of the second sub-filter area.

3. The display panel of claim 1 or 2, wherein, The first pixel opening comprises a first alpha pixel opening and a first beta pixel opening; The length of the first alpha pixel opening along the first radial direction is greater than the length of the first beta pixel opening along the first radial direction; The first filter group comprises a first filter group A and a first filter group B; the first filter group A comprises a first filter structure A and a second filter structure A, the second filter structure A comprises a first opening A, and the first filter structure A is located in the first opening A; the first filter group B comprises a first filter structure B and a second filter structure B, the second filter structure B comprises a first opening B, and the first filter structure B is located in the first opening B; In the first direction, a projection of the first filter structure A covers the first pixel opening A, and a non-overlapping area between a projection of the first opening A and the first pixel opening A is a first filter area A; a projection of the first filter structure B covers the first pixel opening B, and a non-overlapping area between a projection of the first opening B and the first pixel opening B is a first filter area B; In the first radial direction, a width of the first filter area A is greater than a width of the first filter area B.

4. The display panel of claim 3, wherein, In the first radial direction, a width of the second filter structure A is greater than a width of the second filter structure B.

5. The display panel of claim 1, wherein, The first filter group further comprises a fourth filter structure; In the first direction, a projection of the fourth filter structure surrounds a projection of the second filter structure, and a filter color of the fourth filter structure is different from filter colors of the first filter structure and the second filter structure.

6. The display panel of claim 5, wherein, In the first radial direction, a width of the fourth filter structure is greater than a length of the first pixel opening.

7. The display panel of claim 6, wherein, In the first radial direction, a width of the fourth filter structure is greater than a width of the second filter structure.

8. The display panel of claim 5, wherein, In the same first filter group, a transmittance of the second filter structure to light emitted by the first light emitting unit is greater than a transmittance of the fourth filter structure to the light emitted by the first light emitting unit.

9. The display panel of claim 5, wherein, A sum of the transmittance of the second filter structure to the light emitted by the first light emitting unit and the transmittance of the fourth filter structure to the light emitted by the first light emitting unit is less than a transmittance of the first filter structure to the light emitted by the first light emitting unit.

10. The display panel of claim 1, wherein, The first filter structure is a green filter structure or a blue filter structure; and the second filter structure is a red filter structure.

11. A display device, characterized by comprising: The display panel comprises any one of claims 1-10.

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