CN-117082895-B - Display panel, preparation method thereof and display device

CN117082895BCN 117082895 BCN117082895 BCN 117082895BCN-117082895-B

Abstract

The invention provides a display panel which is provided with a display area, a hole area and a peripheral area, wherein the peripheral area is arranged on the periphery of the hole area in a surrounding mode, the display area is arranged on the periphery of the peripheral area in a surrounding mode, the display panel comprises a back plate, a plurality of light-emitting elements, a packaging layer and a first flat layer, the back plate, the packaging layer and the first flat layer are arranged in the display area and the peripheral area, the plurality of light-emitting elements are arranged on the display area and on one side of the back plate, the packaging layer is arranged on one side of the plurality of light-emitting elements, the packaging layer is arranged on one side of the packaging layer, which is away from the back plate, the first flat layer is arranged on one side of the packaging layer, which is away from the back plate, and the plurality of light-extracting structures are respectively in one-to-one correspondence with the plurality of light-emitting elements, and the orthographic projection of the light-extracting structures on the back plate covers the light-emitting elements. The display panel can avoid GDSH (namely black spots at the edge of the hole) defects in the peripheral area at the periphery of the hole area.

Inventors

ZHANG FANG
WANG YANQIANG
GAO TAO
GUO YUANZHENG

Assignees

京东方科技集团股份有限公司
成都京东方光电科技有限公司

Dates

Publication Date: 20260508
Application Date: 20230823

Claims (10)

1. A display panel comprises a display region, a hole region and a peripheral region, wherein the peripheral region is arranged around the periphery of the hole region, the display region is arranged around the periphery of the peripheral region, The display panel comprises a back plate, a plurality of light emitting elements, an encapsulation layer and a first flat layer, The back plate, the encapsulation layer and the first planarization layer are located in the display area and the peripheral area, The light emitting elements are positioned in the display area and at one side of the backboard, The encapsulation layer is located on a side of the plurality of light emitting elements facing away from the back plate, The first planar layer is located on a side of the encapsulation layer facing away from the back plate, The display device is characterized by further comprising a plurality of light extraction structures, wherein the light extraction structures are positioned in the display area and positioned on one side of the packaging layer, which is far away from the backboard, and one side of the first flat layer, which is close to the backboard, the plurality of light extraction structures are respectively in one-to-one correspondence with the plurality of light emitting elements, and orthographic projection of the light extraction structures on the backboard covers the light emitting elements; The display panel further comprises a touch pattern, wherein the touch pattern is positioned in the display area and positioned on one side of the packaging layer, which is away from the backboard, and one side of the first flat layer, which is close to the backboard; the touch pattern does not overlap with the light extraction structure and the orthographic projection of the light emitting element on the back plate, The touch pattern comprises a first layer pattern and a second layer pattern which are sequentially far away from the backboard, The display panel further includes a second insulating layer positioned on a side of the first layer pattern facing away from the back plate and a side of the second layer pattern adjacent to the back plate, The local pattern of the second layer pattern is electrically connected with the local pattern of the first layer pattern through a via hole arranged in the second insulating layer.
2. The display panel of claim 1, wherein the light extraction structure has a refractive index in a range of 1.65-1.9.
3. The display panel of claim 1, wherein a cross-sectional shape of the light extraction structure perpendicular to the back plate comprises a trapezoid, The angle range of the base angle of the trapezoid is 60-70 degrees.
4. The display panel of claim 1, wherein the touch pattern is located on a side of the light extraction structure facing away from the back plane and a side of the first planar layer adjacent to the back plane, The touch panel further comprises a first insulating layer, wherein the first insulating layer is positioned on one side of the light extraction structure, which is away from the backboard, and one side of the touch pattern, which is close to the backboard.
5. The display panel according to claim 4, wherein a refractive index of the light extraction structure is greater than or equal to a refractive index of the first insulating layer and the second insulating layer, The refractive index of the first insulating layer and the second insulating layer is greater than the refractive index of the first planarization layer.
6. The display panel of claim 1, wherein the touch pattern is located on a side of the encapsulation layer facing away from the back plane and a side of the light extraction structure adjacent to the back plane, The display panel further comprises a first insulating layer positioned on one side of the encapsulation layer facing away from the back plate and one side of the first layer pattern close to the back plate, The display panel further comprises a second flat layer, wherein the second flat layer is positioned on one side of the second layer pattern, which is away from the back plate, and one side of the light extraction structure, which is close to the back plate, and the orthographic projection of the second flat layer on the back plate covers the display area and the peripheral area.
7. The display panel according to claim 6, wherein a refractive index of the light extraction structure is greater than or equal to a refractive index of the first insulating layer and the second insulating layer, The refractive index of the light extraction structure is greater than the refractive indices of the first and second planar layers.
8. The display panel according to claim 4 or 6, wherein the back plate comprises a substrate, a plurality of insulating film layers and a plurality of conductive film layers, The conductive film layers and the insulating film layers are alternately stacked on one side of the substrate; The packaging layer comprises a first inorganic packaging layer, an organic packaging layer and a second inorganic packaging layer, and the first inorganic packaging layer, the organic packaging layer and the second inorganic packaging layer are sequentially far away from the backboard to be stacked.
9. A display device comprising the display panel of any one of claims 1-8.
10. The method for manufacturing a display panel according to any one of claims 1 to 8, comprising preparing a back plate; preparing a plurality of light emitting elements on one side of the back plate; Preparing an encapsulation layer on one side of the plurality of light emitting elements, which is away from the back plate; Preparing a plurality of light extraction structures on one side of the encapsulation layer away from the back plate; preparing a first planar layer on a side of the light extraction structure facing away from the back plate; and cutting to form a hole in the display panel, wherein the hole penetrates through the thickness of the display panel, and the hole is used for accommodating an image pickup device.

Description

Display panel, preparation method thereof and display device Technical Field The invention belongs to the field of display, and particularly relates to a display panel, a preparation method thereof and a display device. Background With the advancement of technology, the social living standard is improved, and the requirements of consumers on display products are increasingly improved. High resolution, high quality display products are a definite direction of development. Organic Light-Emitting Diode (OLED) display products are favored because of their self-luminescence, high brightness, wide viewing angle, rapid response, and capability of being fabricated as red, green, and blue full-color components. Disclosure of Invention Aiming at the problem that GDSH (namely black spots at the edge of a hole) is bad due to reliability failure of an OLED display panel, the invention provides a display panel, a preparation method thereof and a display device. According to the display panel, the first flat layer is arranged in the peripheral area, and the light extraction structure is not arranged in the peripheral area, so that the light extraction structure in the peripheral area is not contacted with the first flat layer, further, the warping of the light extraction structure in the reliability test of the display panel caused by the material difference of the light extraction structure and the first flat layer is avoided, the reliability failure of the display panel is avoided, and the defect that GDSH (namely black spots at the edge of a hole) is finally avoided in the peripheral area of the hole area of the display panel. The invention provides a display panel, which is provided with a display area, a hole area and a peripheral area, wherein the peripheral area is arranged on the periphery of the hole area in a surrounding manner, the display area is arranged on the periphery of the peripheral area in a surrounding manner, The display panel comprises a back plate, a plurality of light emitting elements, an encapsulation layer and a first flat layer, The back plate, the encapsulation layer and the first planarization layer are located in the display area and the peripheral area, The light emitting elements are positioned in the display area and at one side of the backboard, The encapsulation layer is located on a side of the plurality of light emitting elements facing away from the back plate, The first planar layer is located on a side of the encapsulation layer facing away from the back plate, The display panel comprises a back plate, a first flat layer, a display area, a plurality of light extraction structures, a plurality of light emitting elements and a light source, wherein the light extraction structures are located in the display area and located on one side, away from the back plate, of the packaging layer and on one side, close to the back plate, of the first flat layer, the light extraction structures are in one-to-one correspondence with the light emitting elements respectively, and orthographic projection of the light extraction structures on the back plate covers the light emitting elements. In some embodiments, the refractive index of the light extraction structure ranges from 1.65 to 1.9. In some embodiments, the cross-sectional shape of the light extraction structure perpendicular to the back plate comprises a trapezoid, The angle range of the base angle of the trapezoid is 60-70 degrees. In some embodiments, the display device further comprises a touch pattern positioned on the display area and on a side of the light extraction structure facing away from the back plate and a side of the first planar layer adjacent to the back plate, the touch pattern not overlapping with orthographic projections of the light extraction structure and the light emitting element on the back plate, The touch panel also comprises a first insulating layer which is positioned on one side of the light extraction structure, which is away from the back plate, and one side of the touch pattern, which is close to the back plate, The touch pattern comprises a first layer pattern and a second layer pattern which are sequentially far away from the backboard, The display panel further includes a second insulating layer positioned on a side of the first layer pattern facing away from the back plate and a side of the second layer pattern adjacent to the back plate, The local pattern of the second layer pattern is electrically connected with the local pattern of the first layer pattern through a via hole arranged in the second insulating layer. In some embodiments, the refractive index of the light extraction structure is greater than or equal to the refractive index of the first insulating layer and the second insulating layer, The refractive index of the first insulating layer and the second insulating layer is greater than the refractive index of the first planarization layer. In some embodiments, the display device further comp