Search

CN-115720457-B - Display panel and display device

CN115720457BCN 115720457 BCN115720457 BCN 115720457BCN-115720457-B

Abstract

The application provides a display panel and a display device, wherein the display panel comprises a substrate, a light emitting functional layer, a shading layer, a light extraction layer and a light filtering layer, the light emitting functional layer is arranged on one side of the substrate and comprises a plurality of light emitting units, the shading layer is arranged on one side of the light emitting functional layer, which is away from the substrate, and comprises a plurality of first openings, the first openings are arranged corresponding to the light emitting units, the light extraction layer wraps the side walls of the first openings and comprises a plurality of second openings, the second openings are arranged corresponding to the light emitting units, the light filtering layer comprises a plurality of light filtering units, the light filtering units are filled in the second openings and are arranged corresponding to the light emitting units, wherein the refractive index of the light extraction layer is smaller than that of the light filtering units, so that part of emergent light emitted by the light emitting units can irradiate the side walls of the second openings through the light filtering units, and is emitted from the emergent light side of the display panel after total reflection is generated on the side walls of the second openings, the emergent light is reduced or prevented from being absorbed by the shading layer, and the emergent light efficiency of the display panel is improved.

Inventors

  • NI JING

Assignees

  • 武汉华星光电半导体显示技术有限公司

Dates

Publication Date
20260512
Application Date
20221129

Claims (10)

  1. 1. A display panel, comprising: A substrate; a light emitting function layer disposed on one side of the substrate and including a plurality of light emitting units; The light shielding layer is arranged on one side of the light emitting functional layer, which is away from the substrate, and comprises a plurality of first openings, wherein the first openings are arranged corresponding to the light emitting units; the light extraction layer at least covers the side wall of the first opening and comprises a plurality of second openings, and the second openings are arranged corresponding to the light emitting units; the light extraction layer comprises a plurality of light extraction units, wherein the light extraction units are filled in the first openings and are arranged corresponding to the light emitting units; The light extraction layer further comprises a first extension part which at least covers part of one side of the shading layer far away from the substrate, and a second extension part which at least covers part of one side of the shading layer far away from the substrate; The second extension part is arranged at a distance from the first extension part with the light shielding layer, or the second extension part covers the first extension part and is in direct contact with one side surface of the light shielding layer away from the substrate.
  2. 2. The display panel according to claim 1, further comprising an inorganic layer provided on a side of the light-emitting functional layer facing away from the substrate and in contact with a surface of the light-shielding layer on a side facing toward the substrate; The light extraction layer passes through the first opening to be in contact with the inorganic layer, and comprises an inorganic contact part which is in contact with the inorganic layer, wherein the inorganic contact part is made of inorganic materials.
  3. 3. The display panel according to claim 2, further comprising a touch functional layer disposed on a side of the light emitting functional layer facing away from the substrate and comprising a touch electrode layer and the inorganic layer, wherein the touch electrode layer comprises a touch electrode disposed corresponding to the light shielding layer, and the light extraction layer is made of an inorganic material; the inorganic layer is arranged on one side of the touch electrode layer, which is away from the substrate.
  4. 4. The display panel according to claim 2, wherein an edge of the first opening near an end of the inorganic layer is a first edge, and an edge of the second opening near an end of the inorganic layer is a second edge, wherein a distance between the first edge and the second edge is greater than or equal to 1 μm.
  5. 5. The display panel according to claim 4, wherein an area of the second opening gradually increases in a direction in which the substrate faces the light extraction layer, and an angle between a sidewall of the second opening and the substrate is k, and 45 ° < k <90 °.
  6. 6. The display panel of claim 5, wherein the second opening has a depth b and the distance between the first edge and the second edge is less than b/tan (2 k-90 °).
  7. 7. The display panel of claim 6, wherein the first opening has a depth a and the filter unit has a thickness c, wherein 0< a < b < c.
  8. 8. The display panel according to claim 6, wherein the plurality of light emitting units includes a red light emitting unit, a green light emitting unit, and a blue light emitting unit, the plurality of light filtering units includes a red light filtering unit, a green light filtering unit, and a blue light filtering unit, the red light filtering unit is disposed corresponding to the red light emitting unit, the green light filtering unit is disposed corresponding to the green light emitting unit, and the blue light filtering unit is disposed corresponding to the blue light emitting unit; The refractive index of the red light filtering unit is z1, the refractive index of the green light filtering unit is z2, the refractive index of the blue light filtering unit is z3, and 0< z3< z1< z2; The light extraction layer comprises a first light extraction unit, a second light extraction unit and a third light extraction unit, wherein the first light extraction unit is arranged corresponding to the red light filtering unit, the second light extraction unit is arranged corresponding to the green light filtering unit, and the third light extraction unit is arranged corresponding to the blue light filtering unit; The included angle between the side wall of the second opening in the first light extraction unit and the substrate is k1, the included angle between the side wall of the second opening in the second light extraction unit and the substrate is k2, and the included angle between the side wall of the second opening in the third light extraction unit and the substrate is k3, wherein k2< k1< k3.
  9. 9. The display panel according to claim 8, wherein the first light extraction unit, the second light extraction unit, and the third light extraction unit each have one of the second openings, the depth of the second opening in the first light extraction unit is b1, the depth of the second opening in the second light extraction unit is b2, the depth of the second opening in the third light extraction unit is b3, and 0< b2< b1< b3.
  10. 10. The display panel according to claim 1, wherein the refractive index of the light extraction layer is 1.4 to 1.6, and the refractive index of the filter unit is 1.5 to 1.75.

Description

Display panel and display device Technical Field The application relates to the technical field of display, in particular to a display panel and a display device. Background Compared with liquid crystal display, the organic light emitting diode (Organic LightEmitting Diode, OLED) display panel has the advantages of lighter weight, better display effect, high resolution, wide color gamut, lower power consumption, capability of realizing flexible display and the like, so that the organic light emitting diode (Organic LightEmitting Diode, OLED) display panel has rapidly developed in recent years and has become the first choice display panel type of mobile terminals. In order to further reduce the manufacturing cost of the OLED display panel and make the OLED display panel lighter and thinner, a Black Matrix (BM) +color Filter (CF) structure is proposed to replace the polarizer with an anti-reflection function in the existing structure, but the OLED display panel with such a structure has a problem of low light emitting efficiency, which results in higher energy consumption of the OLED display panel. Disclosure of Invention The application provides a display panel and a display device, which can effectively solve the problems of low light emitting efficiency and high energy consumption of the existing display panel and display device. The application provides a display panel which comprises a substrate, a light emitting functional layer, a shading layer, a light extraction layer and a filter layer, wherein the light emitting functional layer is arranged on one side of the substrate and comprises a plurality of light emitting units, the shading layer is arranged on one side of the light emitting functional layer, which is away from the substrate, and comprises a plurality of first openings, the first openings are arranged corresponding to the light emitting units, the light extraction layer at least covers the side walls of the first openings and comprises a plurality of second openings, the second openings are arranged corresponding to the light emitting units, the filter layer comprises a plurality of filter units, the filter units are filled in the second openings and are arranged corresponding to the light emitting units, and the refractive index of the light extraction layer is smaller than that of the filter units. Optionally, the display panel further comprises an inorganic layer, wherein the inorganic layer is arranged on one side of the light-emitting functional layer, which is away from the substrate, and is in contact with the surface of the light shielding layer, which is towards one side of the substrate, wherein the light extraction layer passes through the first opening and is in contact with the inorganic layer, and the light extraction layer comprises an inorganic contact part which is in contact with the inorganic layer, and the inorganic contact part is made of an inorganic material. Optionally, the display panel further comprises a touch functional layer, wherein the touch functional layer is arranged on one side, away from the substrate, of the light-emitting functional layer, the touch functional layer comprises a touch electrode layer and an inorganic layer, the touch electrode layer comprises a touch electrode which is arranged corresponding to the light shielding layer, the light extraction layer is made of an inorganic material, and the inorganic layer is arranged on one side, away from the substrate, of the touch electrode layer. Optionally, an edge of the first opening near one end of the inorganic layer is a first edge, and an edge of the second opening near one end of the inorganic layer is a second edge, wherein a distance between the first edge and the second edge is greater than or equal to 1 μm. Optionally, the area of the second opening gradually increases in a direction of the substrate toward the light extraction layer, and an angle between a sidewall of the second opening and the substrate is k, and 45 ° < k <90 °. Optionally, the depth of the second opening is b, and the distance between the first edge and the second edge is less than b/tan (2 k-90 °). Optionally, the depth of the first opening is a, and the thickness of the filter unit is c, wherein 0< a < b < c. The plurality of light emitting units comprise a red light emitting unit, a green light emitting unit and a blue light emitting unit, wherein the plurality of light filtering units comprise a red light filtering unit, a green light filtering unit and a blue light filtering unit, the red light filtering unit is arranged corresponding to the red light emitting unit, the green light filtering unit is arranged corresponding to the green light emitting unit, and the blue light filtering unit is arranged corresponding to the blue light emitting unit; The light extraction layer comprises a first light extraction unit, a second light extraction unit and a third light extraction unit, wherein the first light extraction uni