CN116018029A

CN116018029A - Display panel and display device

Info

Publication number: CN116018029A
Application number: CN202310139663.0A
Authority: CN
Inventors: 曾洋
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-04-25

Abstract

The invention provides a display panel and a display device, wherein the display panel comprises a display area, the display area comprises a normal display area and a device setting area, and the device setting area comprises a plurality of first light emitting units and a plurality of first light filtering groups; the first light filtering group comprises a first light filtering structure and a second light filtering structure; along a first direction Z, 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; the color of the first light filtering structure is the same as the color of the corresponding first light emitting unit, and the color of the second light filtering structure is different from the color of the first light filtering structure. The filtering group adopts one or more filtering ring structures with different filtering colors, which not only can limit the light-emitting visual angle of the light-emitting unit and increase the display contrast, but also can improve the transmittance of external light, thereby reducing the display difference between a normal display area and a device setting area and improving the display effect of the display panel.

Description

Display panel and display device

Technical Field

The embodiment of the invention relates to the technical field of display, in particular to a display panel and a display device.

Background

Along with the improvement of the requirement of users on the screen ratio of the display panel, the technology of arranging the optical device in the screen is mature gradually, but in the screen area of the optical device, the problems that the transmittance of the display light emitted by the display panel is lower, the transmittance of the display light to external light is lower and the display effect is poor still exist, and the application requirement of the display panel cannot be completely met.

Disclosure of Invention

The invention provides a display panel and a display device, wherein a filtering assembly in a device setting area adopts one or more filtering ring structures with different filtering colors, so that the display difference between a normal display area and the device setting area is reduced, and the device setting area has a display function and higher transmittance to external environment light.

In a first aspect, an embodiment of the present invention provides a display panel, including a display area, where the display area includes a normal display area and a device setting area, and 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 light filtering groups, and at least part of the first light filtering groups are positioned on the light emitting side of the first light emitting units;

the first light filtering group comprises a first light filtering structure and a second light filtering structure;

along 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; the light-emitting unit comprises a first light-emitting unit, a second light-emitting unit, a first light-filtering structure, a second light-filtering structure and a third light-filtering structure, wherein the light-filtering color of the first light-filtering structure is the same as the light-emitting color of the corresponding first light-emitting unit, and the light-filtering color of the second light-filtering structure is different from the light-filtering color of the first light-filtering structure; the first direction is a direction perpendicular to the plane of the display panel.

In a second aspect, an embodiment of the present invention further provides a display apparatus, where the display apparatus includes the display panel provided in the first aspect.

According to the display panel provided by the embodiment of the invention, the light filtering group at the light emitting side of the light emitting unit of the device setting area is reasonably arranged, the central light filtering structure corresponding to the light emitting color is arranged according to the light emitting color of the light emitting unit, and one or more light filtering structures with different light filtering colors are adopted to surround the central light filtering structure by taking the central light filtering structure as the center, so that the annular light filtering structure surrounds the pixel opening of the light emitting unit with different colors, the effects of limiting the light emitting visual angle of the light emitting unit, increasing the display contrast ratio and transmitting part of external light can be achieved, the photosensitive performance of the photosensitive device in the device setting area is improved, the display difference between the normal display area and the device setting area is reduced, and the device setting area of the display panel obtained by the application has higher transmittance to external environment light at the same time under the condition that the display visual angle characteristic is not influenced, and the display effect of the display panel is improved.

Drawings

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of a film structure of a display panel in the M region of FIG. 1;

FIG. 3 is a schematic cross-sectional view of a display panel along the BB' direction in FIG. 1;

FIG. 4 is a schematic cross-sectional view of another display panel along the BB' direction in FIG. 1;

FIG. 5 is a schematic plan view of a filter group corresponding to a light emitting unit with the same color in different display areas in FIG. 2;

FIG. 6 is a schematic cross-sectional view of another display panel along the BB' direction in FIG. 1;

FIG. 7 is a schematic cross-sectional view of another display panel along the BB' direction in FIG. 1;

FIG. 8 is a schematic view of a portion of a film structure of a display panel in the M region of FIG. 1;

FIG. 9 is a schematic cross-sectional view of another display panel along the BB' direction in FIG. 1;

FIG. 10 is a schematic plan view of a filter group corresponding to a light emitting unit with the same color in different display areas in FIG. 8;

FIG. 11 is a schematic diagram of a light spectrum of a display panel and a transmission spectrum of a filter structure according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention.

Detailed Description

The invention is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present invention are shown in the drawings.

The embodiment of the invention provides a display panel, which comprises a display area, wherein the display area comprises a normal display area and a device setting area, and 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 light filtering groups, and at least part of the first light filtering groups are positioned on the light emitting side of the first light emitting units; the first light filtering group comprises a first light filtering structure and a second light filtering 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; the color of the first light filtering structure is the same as the color of the corresponding first light emitting unit, and the color of the second light filtering structure is different from the color of the first light filtering structure. The first direction Z is the direction perpendicular to the plane of the display panel.

By adopting the technical scheme, through reasonably setting the light-emitting unit light-emitting side filter group of the device setting area, the central filter structure corresponding to the light-emitting color is set according to the light-emitting color of the light-emitting unit, and then the central filter structure is taken as the center, one or more filter structures with different filter colors are adopted to surround the central filter structure, so that the annular filter structure surrounds the pixel opening of the light-emitting unit with different colors, the effect of limiting the light-emitting visual angle of the light-emitting unit can be achieved, part of external light can be transmitted, the photosensitivity of the photosensitive device in the device setting area is improved, and under the condition that the display visual angle characteristic is not influenced, the device setting area of the display panel obtained by the application gives consideration to the display function and has higher transmittance to external environment light.

The foregoing is the core idea of the present invention, and the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in 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 making any inventive effort are intended to fall within the scope of the present invention.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the present invention; FIG. 2 is a schematic view of a portion of a film structure of a display panel in the M region of FIG. 1; FIG. 3 is a schematic cross-sectional view of a display panel along the BB' direction in FIG. 1; fig. 4 is a schematic cross-sectional view of another display panel along the BB' direction in fig. 1. Referring to fig. 1 to fig. 4, a display panel 200 according to an embodiment of the present invention includes a display area AA, where the display area AA includes a normal display area A1 and a device setting area A2, and 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 filter groups 30, at least part of the first filter groups 30 are located on the light emitting side of the first light emitting units 20; the first filter group 30 includes a first filter structure 31 and a second filter structure 32; along the first direction Z, the projection of the first filter structure 31 covers the first light emitting unit 20, the projection of the second filter structure 32 surrounds the projection of the first filter structure 31, and the projection of the second filter structure 32 meets or partially overlaps the projection of the first filter structure 31; the filter color of the first filter structure 31 is the same as the corresponding color of the light emitted from the first light emitting unit 20, and the filter color of the second filter structure 32 is different from the filter color of the first filter structure 31. The first direction Z is the direction perpendicular to the plane of the display panel.

Specifically, the display panel 200 includes an organic light emitting display panel (Organic Light Emitting Diode Display, OLED), a light emitting diode display panel (Light Emitting Diode Display, LED), a liquid crystal display panel (Liquid Crystal Display, LCD), and the like, and the type of the display panel 200 is not particularly limited in the embodiments of the present invention. The normal display area A1 of the display panel 200 is used for normally displaying images, the device setting area A2 includes a light emitting area and a light transmitting area, the light emitting area is provided with a plurality of first light emitting units 20 for displaying images, and the light transmitting area can transmit external light into the display panel. For example, the device setting area A2 is an under-screen camera (Camera under Panel, CUP) setting area, and photosensitive elements such as a camera are set under the screen in the area, so that the device setting area A2 has both a display function and a light transmission function. The device setting area A2 and the normal display area A1 together form a display area AA of the display panel.

Normally, the normal display area A1 and the device setting area A2 are provided with light emitting units, and the light emitting sides of the light emitting units are provided with filter groups so as to improve the display contrast, and parameters such as the size, the number, the arrangement density and the like 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.

Specifically, as shown in fig. 2 to 4, the device-setting area A2 sets a plurality of first light emitting units 20. For example, the first light emitting unit 20 may 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 from the first light emitting unit 20, a first filter group 30 is disposed on the light emitting side of the first light emitting unit 20, where the first filter group 30 includes a first filter structure 31 and at least one first filter structure 32 surrounding the first filter structure 31, so as to form a structure in which at least two filter layers are nested and surrounded. Along the Z direction, the projection of the first filter structure 31 is arranged to cover the first light emitting unit 20, the filter color of the first filter structure 31 corresponds to the light emitting color of the first light emitting unit 20, and the first filter structure 31 is a central filter structure, such as a red filter structure R, a green filter structure G and a blue filter structure B, through which only the outgoing light having the same color can be transmitted.

In a possible embodiment, as shown in fig. 3, the second filter structure 32 is disposed around the first filter structure 31 with the first filter structure 31 as a center, and the second filter structure 32 has a filter color different from the light emission color of the first light emitting unit 20, and a structure in which a projection of the second filter structure 32 overlaps with a projection portion of the first filter structure 31 is formed along the Z direction in the drawing.

In one possible embodiment, as shown in fig. 4, the second filter structure 32 is disposed around the first filter structure 31 with the first filter structure 31 as a center, and the second filter structure 32 has a filter color different from the light emission color of the first light emitting unit 20, and a structure in which the projection of the second filter structure 32 is connected to the projection of the first filter structure 31 along the Z direction in the figure is formed.

As shown in fig. 2-3, a black shading material 203 is disposed 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 an annular filter structure is adopted, so that on one hand, oblique view angle light rays emitted by the first light emitting unit 20 can be absorbed, and large view angle light rays are blocked, which is beneficial to 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 to enter the display panel, so as to improve the transmittance of the device setting area A2 to the external light, and facilitate the photosensitive imaging of the photosensitive devices in the area, thereby comprehensively improving the imaging effect of the display panel

It should be noted that, with continued reference to fig. 4 and 3, the display panel further includes other film layers, such as a substrate 201 and a driving circuit layer 202, where the substrate 201 may be a rigid material such as glass or a silicon wafer, or may be a flexible material such as ultra-thin glass, a metal foil or a polymer plastic material; the driving circuit layer 202 may include a plurality of thin film transistors (Thin Film Transistor, TFT), a storage capacitor, a metal wiring, and other structures, where the driving circuit layer 202 is configured 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 cooperate to realize normal display of the display panel, which is not further described herein.

In summary, the embodiment of the invention provides a display panel, through reasonably setting the light filtering group at the light emitting side of the light emitting unit of the device setting area, setting the central light filtering structure corresponding to the light emitting color according to the light emitting color of the light emitting unit, and surrounding the central light filtering structure by adopting one or more light filtering structures with different light filtering colors of the central light filtering structure as the center, so as to form a plurality of light filtering rings surrounding the light emitting unit with different colors, thereby not only playing the roles of limiting the light emitting visual angle of the light emitting unit and increasing the display contrast, but also transmitting part of external light, improving the photosensitive performance of the photosensitive devices in the device setting area, so as to reduce the display difference between the normal display area and the device setting area.

Fig. 5 is a schematic plan view of a filter group corresponding to a light emitting unit with the same light emitting color in different display areas in fig. 2, wherein (a) in fig. 5 is a schematic plan view of a second filter group in a normal display area, and (b) in fig. 5 is a schematic plan view of a first filter group in a normal display area. On the basis of the above embodiment, as shown in fig. 2 to 5, the normal display area A1 includes a plurality of second light emitting units 40 and a plurality of second filter groups 50, and the second filter groups 50 are located at the light emitting sides of the second light emitting units 40; the display panel 200 further includes a pixel defining layer 60, the pixel defining layer 60 including a plurality of first pixel openings 61 and a plurality of second pixel openings 62, the first light emitting units 20 being located within the first pixel openings 61, the second light emitting units 40 being located within the second pixel openings 62; the length b of the second pixel opening 62 along the second radial direction X ₀ Length a of the first pixel openings 61 along the first radial direction X greater than the same light-emitting color ₀ . The second filter structure 32 includes a first opening D1, and the first filter 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 filter group 50 includes a third filter structure 53, and the third filter 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 corresponding first pixel opening 61 is the first sub-filtering area 310, and the non-overlapping area of the projection of the second opening D2 and the corresponding second pixel opening 62 is the second sub-filtering area 530; width a of first sub-filter 310 along second radial direction X ₁ Greater than the width b of the second sub-filtering region 530 in the first radial direction X ₁ 。

In the embodiment of the present application, the first radial direction and the second radial direction are taken as an example in the X direction in the drawing, and the first radial direction and the second radial direction may also be the Y direction in the drawing, where the first radial direction is a direction pointing to the edge of the first pixel opening with the center of the first pixel opening, and the second radial direction is a direction pointing to the edge of the second pixel opening with the center of the second pixel opening, and the first radial direction and the second radial direction are parallel and are parallel to the plane where the display panel is located, which is not limited specifically herein. The shape of the projection of the light emitting unit along the Z direction can be rectangular, circular or other shapes, and can be set according to the light emitting requirement of the display panel, and specific display is not needed.

Specifically, as shown in fig. 3 and 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 defining layer 60, where the pixel defining layer 60 is located on a side of the driving circuit layer 202 away from the substrate 201, for defining parameters such as a pixel size and a position of the light emitting unit, so that color mixing between pixels can be prevented or reduced. Alternatively, the material of the pixel defining layer 60 may include at least one of polyimide, polyamide, acrylic, and organic insulating materials such as cyclobutene and phenolic; the pixel defining layer 60 may further include at least one of inorganic insulating materials such as SiO2, siNx, al2O3, cuOx, tb4O7, Y2O3, nb2O5, and Pr2O 3; alternatively, the pixel defining layer 114 may also have a multi-layered structure in which organic insulating materials and inorganic insulating materials are alternately formed.

As shown in fig. 3 and 4, a plurality of first pixel openings 61 and a plurality of second pixel openings 62 are formed in the pixel defining layer 60, the first pixel openings 61 are used for defining the size of the first light emitting units 20, and the second pixel openings 62 are used for defining the size of the second light emitting units 50. In a possible implementation manner, the structure of partially surrounding the second light emitting unit 50 may be formed by removing the redundant pixel defining layer 60 in the device setting region 2, or the pixel defining layer 60 may be made of a transparent insulating material in the device setting region 2, so as to improve the transmittance of the device setting region 2 to the external ambient light S.

Under the condition of not affecting the display effect, the size of the first pixel opening 61 in the device setting area A2 can be further 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. First pixel opening 61 and second pixel opening with same light emitting colorThe pixel opening 62 is exemplified by the length b of the second pixel opening 62 along the X direction in the figure ₀ Length a of the first pixel opening 61 greater than the same light-emitting color ₀ 。

The second filter structure 32 includes a first opening D1 for defining parameters such as a filter size and a position of the first filter structure 31. The display panel 200 further includes a light shielding layer 203, where the light shielding layer 203 is made of a black light shielding material, and the light shielding layer 203 is located on the light emitting side of the second light emitting unit 40 and includes a plurality of second openings D2 for defining parameters such as a filtering size and a position of the third filtering structure 53, so that color mixing between pixels can be prevented or reduced.

As shown in fig. 3 and 4, since the projection of the first filter structure 31 along the Z direction in the drawing covers the first pixel opening 61, the projection of the first filter structure 31 along the Z direction in the drawing overlaps or partially overlaps the second filter structure 32, the projection of the second filter structure 32 along the Z direction in the drawing covers the second pixel opening 62, the second filter structure 32 overlaps or partially overlaps 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 in the drawing 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 in the drawing and the second pixel opening 62 is defined as a second sub-filter area 530, and the width a of the first sub-filter area 310 along the X direction in the drawing is set ₁ Greater than the width b of the second sub-filtering region 530 in the X direction of the drawing ₁ By increasing the size of the first filter structure 31, it is beneficial to increase the light emitting efficiency of the oblique angle light emitted from the first pixel opening 61, and reduce the difference between the normal display area A1 and the device setting area A2, so as to balance the light emitting brightness of the display area.

On the basis of the above embodiment, as further shown in fig. 2 to 5, the width a of the second filter structure 32 along the first radial direction X ₂ Greater than the length a of the first pixel opening 61 in the first radial direction X ₀ 。

Specifically, as shown in conjunction with fig. 2 and 4, a is set up ₂ ＞a ₀ θ emitted from the second filter structure 32 to the first pixel opening 61 ₁ Light absorption in the viewing angle range is beneficial to improving the light-emitting purity of the first light-emitting unit 20 and the adderDisplay contrast of the piece setting area.

Fig. 6 is a schematic cross-sectional view of another display panel in the direction BB 'in fig. 1, and fig. 7 is a schematic cross-sectional view of another display panel in the direction BB' in fig. 1. On the basis of the above-described embodiment, as shown in fig. 6 and 7, the first light emitting unit 20 includes the first light emitting unit 21 and the first second light emitting unit 22; the first pixel opening 61 includes a first a pixel opening 611 and a first b pixel opening 612; the first light emitting unit 21 is located in the first pixel opening 611, and the first second light emitting unit 22 is located in the first second pixel opening 612; length a of first A pixel opening 611 along X direction in the figure ₀₁ Greater than the length a of the first pixel opening 612 in the X-direction of the drawing ₀₂ . The first filter group 30 includes a first filter group 33 and a first second filter group 34; the first-class optical filter group 33 includes a first-class optical filter structure 331 and a second-class optical filter structure 332, the second-class optical filter structure 322 includes a first-class opening D3, and the first-class optical filter structure 331 is located in the first-class opening D3; the first second optical filtering set 34 includes a first second optical filtering structure 341 and a second optical filtering structure 342, the second optical filtering structure 342 includes a first second opening D4, and the first second optical filtering structure 341 is located in the first second opening D4; along the first direction Z, the projection of the first-pass structure 331 covers the first-pass pixel opening 611, and the non-overlapping area of the projection and the first A pixel opening 611 is the first A filter area 330; the projection of the first b filter structure 341 covers the first b pixel opening 612, and the non-overlapping area between the projection of the first b filter structure and the first b pixel opening 612 is the first b filter area 340; width a of first A filter region 330 along first radial direction X ₁₁ Is greater than the width a of the first B filter 340 along the X direction in the figure ₁₂ 。

Specifically, as shown in fig. 6, the first light emitting units 20 in the device setting area A2 include a red light emitting unit R, a green light emitting unit G, and a blue light emitting unit B, and there are first light emitting units 21 and first second light emitting units 22 having different light emitting colors, for example, the red light emitting unit R and the green light emitting unit G, respectively, due to the difference in the light emitting efficiency of the light emitting units, the difference in the sizes of the first light emitting units 20 having different light emitting colors. In a possible implementation manner, the light emitted by the red light emitting unit RThe first filter structure 331 for red filtering and the second first filter structure 332 for non-red filtering are arranged on the sides, the first opening D3 exists in the second first filter structure 322, the first filter structure 331 is nested in the first opening D3, and for example, the second first filter structure 332 is a blue filter structure or a green filter structure. The first-nail pixel opening 611 is used for defining parameters such as the size and the position of the first-nail light-emitting unit 21, and defining a non-overlapping area between the projection of the first-nail opening D3 along the first direction Z and the first-nail pixel opening 611 as the first-nail filtering area 330; a first b filter structure 341 for green filtering and a first b filter structure 341 for non-green filtering are disposed at the light emitting side of the green light emitting unit G, for example, the first b filter structure 341 is a red filter structure or a blue filter structure. The first b pixel opening 612 is used for defining parameters such as a size and a position of the first b light emitting unit 22, and a non-overlapping area between a projection of the first b opening D4 along the first direction Z and the first b pixel opening 612 is defined as the first b filter area 340. As shown in fig. 6, due to the width a of the red light emitting unit R in the X direction ₀₁ And a width a of the green light emitting unit G in the X direction ₀₂ There are differences, a ₀₁ ＞a ₀₂ Correspondingly, the width a of the first A filter region 330 along the X direction in the figure ₁₁ And a width a of the first B filter region 340 along the X direction in the figure ₁₂ Differentiation is carried out, and a is set up ₁₁ ＞a ₁₂ . With this arrangement, it is advantageous to synchronously improve the light-emitting efficiency of the oblique-view angle light rays emitted from the first light-emitting unit 21 and the first second light-emitting unit 22 of different light-emitting colors and the first third light-emitting unit 23.

In fig. 6, only the first filter structure 331 and the second first filter structure 332 are connected, and the first second filter structure 341 are connected.

By analogy, as shown in connection with fig. 7, the first light emitting unit 20 further comprises a first propyl light emitting unit 23, the first pixel opening 61 further comprises a first propyl pixel opening 613, the first propyl light emitting unit 23 is located in the first propyl pixel opening 613, the first filter group 30 further comprises a first propyl filter group 35, the first propyl filter group 35 further comprises a first propyl filter structure 351 and a second propyl filter structure 352, the first propyl filterThe light structure 351 includes a first propyl opening D5, and the first propyl filter structure 351 is located within the first propyl opening D5. Along the first direction Z, the projection of the first light-emitting unit 23 is covered by the projection of the first light-filtering structure 351, and the non-overlapping area of the projection of the first light-emitting opening D5 and the first light-emitting unit 23 is the first light-filtering area 350, for the blue light-emitting element B, the red light-emitting unit R and the green light-emitting unit G, a with different pixel opening sizes ₀₃ ＞a ₀₁ ＞a ₀₂ The pixel filter ring is subjected to differentiation setting, and a is set ₁₃ ＞a ₁₁ ＞a ₁₂ . Wherein a is ₀₃ A is the width of the third light-emitting unit 23 (blue light-emitting element B) along the X direction in the figure ₁₃ Is the width a of the first C filter region 350 along the X direction in the figure ₁₃ . With this arrangement, it is advantageous to synchronously improve the light-emitting efficiency of the oblique-view angle rays emitted from the first light-emitting unit 21, the first second light-emitting unit 22, and the first third light-emitting unit 23 of different light-emitting colors, thereby improving the display brightness of the device setting area A2.

In fig. 7, only the first filter structure 331 and the second first filter structure 332 are connected, the first second filter structure 341 and the first second filter structure 341 are connected, and the first third filter structure 351 and the second third filter structure 352 are connected.

On the basis of the above embodiment, as further shown in fig. 6, the width a of the second first filtering structure 332 along the first radial direction X ₂₁ Is greater than the width a of the second filtering structure 342 along the X direction in the figure ₂₂ 。

Specifically, the filter groups corresponding to the first light emitting unit 21 and the second light emitting unit 22 are each composed of a central filter structure and another filter ring structure with different colors, the projection of the second first filter structure 332 corresponding to the first light emitting unit 21 is set around the projection of the first filter structure 331, the projection of the second filter structure 342 corresponding to the first second light emitting unit 22 is set around the projection of the first second filter structure 341, and the width a of the second first filter structure 332 along the X direction in the figure is set according to the difference of the light emitting sizes of the red light emitting unit R and the green light emitting unit G ₂₁ Is greater than the width a of the second filtering structure 342 along the X direction in the figure ₂₂ 。

By analogy, continuing with fig. 7, along the first direction Z, the projection of the second light filtering structure 352 surrounds the projection of the first light filtering structure 351, for the blue light emitting element B, the red light emitting unit R, and the green light emitting unit G, a with different pixel opening sizes ₀₃ ＞a ₀₁ ＞a ₀₂ The pixel filter ring is subjected to differentiation setting, and a is set ₂₃ ＞a ₂₁ ＞a ₂₂ . Wherein a is ₂₃ Is the width a of the second light filtering structure 352 along the X direction in the figure ₂₃ . With this arrangement, θ that the second first filter structure 332 emits toward the first pixel opening 611 is facilitated ₂ Light absorption within the viewing angle range is beneficial to improving the light-emitting purity of the first light-emitting unit 21, and the second light-filtering structure 342 is used for emitting theta to the first second pixel opening 612 ₃ Light absorption within the viewing angle range is beneficial to improving the light-emitting purity of the first second light-emitting unit 22, and the second light-filtering structure 352 outputs theta to the first light-emitting pixel opening 613 ₄ Light absorption in the viewing angle range is beneficial to improving the light-emitting purity of the first light-emitting unit 23, thereby increasing the display contrast of the device setting region.

FIG. 8 is a schematic view of a portion of a film structure of a display panel in the M region of FIG. 1; FIG. 9 is a schematic cross-sectional view of another display panel along the BB' direction in FIG. 1; fig. 10 is a schematic plan view of a filter group corresponding to a light emitting unit with the same light emitting color in different display areas in fig. 8. Fig. 10 (a) is a schematic plan view of a second filter group in the normal display area, and fig. 10 (b) is a schematic plan view of a first filter group in the normal display area. On the basis of the above embodiment, as shown in fig. 8 to 10, the first filter group 30 further includes 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 meets or partially overlaps the projection of the second filter structure 32, 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.

Specifically, as shown in fig. 8-10, the first filter group 30 may use 2 filter structures with different filter colors to surround the central filter structure, and a projection of the fourth filter structure 35 along the Z direction in the figure is set around a projection of the second filter structure 32, and in a possible embodiment, as shown in fig. 9, the projection of the fourth filter structure 35 is connected with the projection of the second filter structure 32; in a possible embodiment, the fourth filter structure and the second filter structure 32 partly overlap. The fourth filter structure 35 is also provided with a different filter color than the first filter structure 31 and the second filter structure 32. The fourth filter structure 35 is adopted to further absorb the light rays within the range of the oblique viewing angle emitted by the first light-emitting unit 20, so that the light-emitting purity and the display contrast are improved; meanwhile, the fourth filter structure 35 can partially transmit the external light S2, so as to improve the light transmittance of the device setting area a.

On the basis of the above embodiment, with continued reference to fig. 9, the width a of the fourth filter structure 35 in the X direction in the drawing is shown ₃ Greater than the length a of the first pixel opening 61 in the X direction in the figure ₀ 。

Specifically, by setting a ₃ ＞a ₀ Favorable for the fourth filter structure 35 to emit theta to the first pixel opening 61 ₅ Light within the viewing angle range is absorbed, and large viewing angle light of the first light emitting unit 20 is blocked, so that the light emitting purity of the first light emitting unit 20 is further improved, and the display contrast of the device setting area is increased.

On the basis of the above embodiment, with continued reference to fig. 9 and 10, the width a of the fourth filter structure 35 in the X direction in the drawing is shown ₃ Is larger than the width a of the second filter structure 32 along the X direction in the figure ₂ 。

Specifically, in order to ensure shielding of the first light-emitting unit 20 from the oblique-view angle light rays by the filter rings of the multiple filter colors, a is reasonably set up ₃ ＞a ₂ ＞a ₀ The light absorption of the fourth optical filtering structure 35 and the second optical filtering structure 32 within the specific viewing angle range emitted by the first pixel opening 61 is facilitated, the light emitting purity of the first light emitting unit 20 is improved, the display contrast of the device setting area is increased, and meanwhile, the light transmittance performance of the device setting area a is considered.

The base of the above embodimentOn the basis, as shown in fig. 7-10, in the same first filter group 30, the transmittance T of the second filter structure 32 for the light emitted from the first light emitting unit 20 ₁ Is larger than the transmittance T of the fourth filter structure 35 to the emergent light of the first light-emitting unit 20 ₂ 。

Specifically, it is considered that since 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, the luminance in the device setting area A2 may decrease faster than the normal display area A1 when the oblique viewing angle is blocked, possibly resulting in visibility. So that the same first filter group 30 can be arranged, and the second filter structure 32 (inner ring) has a transmittance T for the light emitted from the first light emitting unit 20 ₁ Is larger than the transmittance T of the fourth filter structure 35 (outer ring) to the light emitted from the first light emitting unit 20 ₂ By reasonably selecting the materials and the transmittance of the second filter structure 32 and the fourth filter structure 35, the difference between the brightness change of the device setting area A2 and the brightness change of the normal display area A1 can be improved, and the brightness uniformity of the whole display area AA is facilitated.

Fig. 11 is an overlapping schematic diagram of a light emission spectrum of a display panel and a transmission spectrum of a filtering structure according to an embodiment of the present invention. Wherein the abscissa in FIG. 11 is wavelength in nm; in fig. 11, the left ordinate indicates the luminous intensity, and the right ordinate indicates the transmittance. In fig. 11, taking an OLED display panel as an example, CF rings with different filtering colors are selected according to the overlapping degree of the OLED light emission spectrum and the light filtering structure (CF) transmission spectrum.

In a possible embodiment, as shown in fig. 11 and table 1, a filter structure with a small overlap of filter bands may be selected, i.e. in the same first filter group 30, a design may be designed for G-B-R, B-G-R, R-G-B from inside to outside. Wherein, 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 light filtering structure 31 adopts a blue light filtering structure CF-B, the second light filtering structure 32 adopts a green light filtering structure CF-G, and the fourth light filtering structure 35 adopts a red light filtering structure CF-R; R-G-B refers to the fact that the first light emitting unit 20 is a red light emitting unit OLED-R, the first light filtering structure 31 adopts a red light filtering structure CF-R, the second light filtering structure 32 adopts a green light filtering structure CF-G, the fourth light filtering structure 35 adopts a blue light filtering structure CF-B, and more light filtering groups are arranged, which are not shown one by one.

Table 1 shows the selection relationship between the light-emitting units and the CF ring

OLED (organic light emitting diode) luminous unit	Second filter structure-CF ring
		OLED-B	CF-R
OLED-G	CF-R
		OLED-R	CF-B、CF-G

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 overlapping amount of filter bands, that is, the transmittance of green light and blue light is the lowest, and the red filter structure CF-R absorbs the green light or the blue light emitted from the first light emitting unit 20, so that the display contrast of the device setting area A2 is improved, and meanwhile, the transmittance of the red light of the external light can be improved, and the light sensitivity of the light sensitive device to red light is improved. Similarly, when the first filter structure 31 is a red filter structure CF-R, the second filter structure 32 may be a green filter structure CF-G or a blue filter structure CF-B.

One possible implementation, continuing with fig. 11 and table 1, may also determine CF ring selection based on the transmittance requirements of the RGB bands. For example, the first filter structure 31 is a red filter structure CF-R or a blue filter structure CF-B, and when the transmittance of the device setting area A2 to the external environment is insufficient, the second filter structure 32 may use the blue filter structure CF-B to increase the transmittance to the external environment.

On the basis of the above embodiment, as shown in fig. 8 to 10, the transmittance T of the light emitted from the first light emitting unit 20 by the second filter structure 32 is continued ₁ The sum of the transmittance T2 of the fourth filter structure 35 to the light emitted by the first light emitting unit 20 is smaller than the transmittance T of the first filter structure 31 to the light emitted by the first light emitting unit 20 ₀ 。

Specifically, as shown in FIGS. 8-10, T is further provided ₁ +T ₂ ＜T ₀ That is, in the same first filter group 30, the sum of the transmittance of the filter rings of the multiple different filter colors is smaller than the transmittance of the central filter structure, so that the brightness of the front viewing angle of the first light emitting unit 20 can be ensured, the light emitting of the oblique viewing angle can be inhibited, the purity of the light emitting can be improved, and the brightness variation difference between the device setting area A2 and the normal display area A1 can be improved, so that the brightness of the whole display area AA can be uniform.

Further, optionally, as shown in fig. 2 to 6, the transmittance of the second filter structure 32 for the light emitted by the first light emitting unit 20 is smaller than the transmittance of the first filter structure 31 for the light emitted by the first light emitting unit 20, so as to improve the purity of the light emitted by the first light emitting unit 20.

Based on the same inventive concept, the embodiment of the invention also provides a display device. Fig. 12 is a schematic structural diagram of a display device according to an embodiment of the present invention. As shown in connection with fig. 12, the display device includes any one of the display panels 200 provided in the above-described embodiments. Therefore, the display device also has the advantages of the display panel 200 in the above embodiment, and the same points can be understood with reference to the explanation of the display panel 200, which is not described in detail below.

The display device 300 provided in the embodiment of the present invention may be a mobile phone as shown in fig. 12, or any electronic product with a 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., which is not particularly limited by the embodiment of the invention.

Note that the above is only a preferred embodiment of the present invention and the technical principle applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, while the invention has been described in connection with the above embodiments, the invention is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the invention, which is set forth in the following claims.

Claims

1. A display panel comprising a display region, the display region comprising a normal display region and a device placement region, the normal display region at least partially surrounding the device placement region;

the first light filtering group comprises a first light filtering structure and a second light filtering structure; along a first direction, a projection of the first filter structure covers the first light emitting unit, and a projection of the second filter structure surrounds a projection of the first filter structure; the light-emitting unit comprises a first light-emitting unit, a second light-emitting unit, a first light-filtering structure, a second light-filtering structure, a first light-emitting unit, a second light-filtering structure, a first light-filtering structure and a second light-filtering structure, wherein the light-filtering color of the first light-filtering structure is the same as the light-emitting color of the corresponding first light-emitting unit, and the light-filtering color of the second light-filtering structure is different from the light-filtering color of the first light-filtering structure; the first direction is a direction perpendicular to a plane where the display panel is located.

2. The display panel according to claim 1, wherein the normal display area includes a plurality of second light emitting units and a plurality of second filter groups, the second filter groups being located at a light emitting side of the second light emitting units; the display panel further comprises a pixel defining layer, wherein the pixel defining layer comprises a plurality of first pixel openings and a plurality of second pixel openings, the first light emitting units are positioned in the first pixel openings, and the second light emitting units are positioned in the second pixel openings;

the length of the second pixel opening along the second radial direction is larger than the length of the first pixel opening along the first radial direction of the same light-emitting color; the first radial direction is a direction pointing to the edge of the first pixel opening with the center of the first pixel opening, the second radial direction is a direction pointing to the edge of the second pixel opening with the center of the second pixel opening, and the first radial direction and the second radial direction are parallel;

the second light filtering structure comprises a first opening, and the first light filtering structure is positioned in the first opening;

the display panel further comprises a shading layer, the shading layer is positioned on the light emitting side of the second light emitting unit, the shading layer comprises a second opening, the second light filtering group comprises a third light filtering structure, and the third light filtering structure is positioned in the second opening;

along the first direction, the projection of the first opening and the corresponding non-overlapping area of the first pixel opening are first sub-filtering areas, and the projection of the second opening and the corresponding non-overlapping area of the second pixel opening are second sub-filtering areas;

and the width of the first sub-filtering area is larger than that of the second sub-filtering area along the first radial direction.

3. The display panel of claim 1, further comprising a pixel defining layer comprising a plurality of first pixel openings, the first light emitting units being located within the first pixel openings;

the width of the second light filtering structure along the first radial direction is larger than the length of the first pixel opening along the first radial direction; wherein, the first radial direction is a direction pointing to the edge of the first pixel opening with the center of the first pixel opening.

4. A display panel according to claim 2 or 3, wherein the first pixel opening comprises a first a pixel opening and a first b pixel opening;

the length of the first pixel opening along the first radial direction is greater than the length of the first pixel opening along the first radial direction;

the first optical filtering group comprises a first optical filtering group A and a first optical filtering group B; the first light filtering group comprises a first light filtering structure and a second light filtering structure, the second light filtering structure comprises a first opening, and the first light filtering structure is positioned in the first opening; the first second optical filtering group comprises a first second optical filtering structure and a second optical filtering structure, the second optical filtering structure comprises a first second opening, and the first second optical filtering structure is positioned in the first second opening;

along the first direction, a projection of the first filter structure covers the first pixel opening, the non-overlapping area between the projection of the first opening and the first pixel opening is a first filtering area; the projection of the first second light filtering structure covers the first second light emitting unit, and a non-overlapping area of the projection of the first second opening and the first second pixel opening is a first second light filtering area;

and along the first radial direction, the width of the first optical filtering area is larger than that of the first second optical filtering area.

5. The display panel of claim 4, wherein a width of the second first filter structure is greater than a width of the second filter structure in the first radial direction.

6. The display panel of claim 3, wherein the first filter group further comprises a fourth filter structure;

along the first direction, the projection of the fourth filtering structure surrounds the projection of the second filtering structure, and the filtering color of the fourth filtering structure is different from the filtering color of the first filtering structure and the filtering color of the second filtering structure.

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

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

9. The display panel of claim 6, wherein the transmittance of the second filter structure for the light emitted from the first light emitting unit is greater than the transmittance of the fourth filter structure for the light emitted from the first light emitting unit in the same first filter group.

10. The display panel of claim 6, wherein a sum of a transmittance of the first light emitting unit by the second filter structure and a transmittance of the first light emitting unit by the fourth filter structure is smaller than a transmittance of the first light emitting unit by the first filter structure.

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

12. A display device comprising the display panel of any one of claims 1-11.