WO-2026091920-A1 - DISPLAY PANEL AND DISPLAY DEVICE

WO2026091920A1WO 2026091920 A1WO2026091920 A1WO 2026091920A1WO-2026091920-A1

Abstract

A display panel. The display panel comprises a plurality of first covering portions, a plurality of supporting portions, and a plurality of light-shielding portions. The supporting portions are disposed on the sides of the first covering portions away from a driving backplane; a supporting gap is formed between two adjacent supporting portions on a same first covering portion; a light-shielding portion is disposed in the supporting gap; and light-transmitting openings are formed between the sides of the light-shielding portions close to each other. Before light-shielding blocks are cured to form the light-shielding portions, due to the supporting function of the supporting portions, the problem that the light-shielding blocks are stripped from the first covering portions during flushing is avoided. The shapes and sizes of the light-shielding portions are basically the same. Therefore, the uniformity of the shapes and sizes of the light-transmitting openings is good, and the reflectivity of light in the light-transmitting openings is the same, thereby alleviating alternately bright and dark vertical line defects on the display panel. The present invention further provides a display device comprising the display panel.

Inventors

SHI, BO
HUANG, YINGLONG
SONG, Gukhwan
ZHANG, SHITAO
NI, Zibo

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: 20260507
Application Date: 20250912
Priority Date: 20241029

Claims (20)

A display panel, characterized in that it comprises: Drive backplane; A pixel defining layer is disposed on one side of the driving backplate. The pixel defining layer includes a plurality of pixel defining parts, and a pixel opening is formed between the sides of the pixel defining parts that are close to each other. Multiple pixel electrodes are respectively disposed in different pixel openings; Multiple light-emitting units of different colors are respectively disposed on the side of each pixel electrode away from the driving backplate; A common electrode is located on the side of the plurality of light-emitting units away from the driving backplate; The first cover layer includes a plurality of first cover portions, the first cover portions being disposed on the side of the common electrode away from the driving back plate, a dimming opening being formed between the sides of the first cover portions that are close to each other, and the slope angle of the side of the first cover portion being less than 90 degrees. The filter layer includes filter units of different colors, each filter unit is disposed in a different dimming opening, the filter unit covers the side of the first cover, the orthographic projection of the filter unit on the drive back plate covers the orthographic projection of the light-emitting unit on the drive back plate, and the refractive index of the filter unit is greater than the refractive index of the first cover. The support layer includes multiple support portions, which are located on the side of the first cover portion away from the drive back plate. The support portions are arranged around the dimming opening, and a support gap is formed between two adjacent support portions. The light-shielding layer includes multiple light-shielding parts disposed within the support gap. The light-shielding parts at least cover the side of the support part, and a light-transmitting opening is formed between the sides of the light-shielding parts that are close to each other.
According to claim 1, the display panel is characterized in that the side of the support portion near the driving back plate is a first support surface, the side of the first covering portion away from the driving back plate is a first covering surface, and the edge of the first support surface near the filter unit is flush with the edge of the first covering surface near the filter unit.
The display panel according to claim 1 is characterized in that the angle between the side of the support portion and the side of the support portion near the drive back plate is 30 degrees to 50 degrees.
The display panel according to claim 1, wherein the light-shielding portion extends from the side of the support portion to the side of the support portion away from the drive back plate.
The display panel according to claim 1 is characterized in that the light-shielding part and the side of the support part away from the driving back plate form an overlapping area, and the width of the overlapping area is more than 0.6 times the width of the side of the support part away from the driving back plate.
According to claim 5, the display panel is characterized in that the width of the side of the support portion away from the driving back plate is 3μm to 5μm, and the width of the overlapping area between the light-shielding portion and the side of the support portion away from the driving back plate is less than or equal to 3μm.
The display panel according to claim 1, wherein the light filtering unit extends from the side of the first covering portion to the side covering the support portion, and at least a portion of the side of the light shielding portion away from the driving back plate.
The display panel according to claim 7 is characterized in that the width of the overlapping area between the orthographic projection of the filter unit on the driving back plate and the orthographic projection of the first covering part on the driving back plate is less than or equal to 6 μm.
The display panel according to claim 1 is characterized in that the material of the support portion is different from the material of the first covering portion.
The display panel according to claim 1 is characterized in that the material of the support portion is the same as the material of the first covering portion, and the support portion and the first covering portion are integrally formed.
The display panel according to claim 1 is characterized in that the different color filter units include a first filter unit, a second filter unit and a third filter unit, wherein the color of the first filter unit is red, the color of the second filter unit is green and the color of the third filter unit is blue.
The display panel according to claim 11 is characterized in that the material of the support portion is the same as the material of the filter unit of the nearest color.
The display panel according to claim 11 is characterized in that the material of the support portion is the same as the material of the first filter unit, the material of the second filter unit, or the material of the third filter unit.
The display panel according to claim 12 or 13 is characterized in that the side of the support portion near the driving back plate is flush with the side of the filter unit away from the driving back plate.
The display panel according to claim 12 is characterized in that the side of the support portion away from the driving back plate is flush with the side of the filter unit away from the driving back plate.
According to claim 1, the display panel is characterized in that the refractive index of the first covering portion is 1.45-1.5, and the refractive index of the filter unit is 1.65-1.75.
The display panel according to claim 1 is characterized in that the angle between the side of the first covering portion and the side of the first covering portion near the driving back plate is 45 degrees to 85 degrees.
The display panel according to claim 1 is characterized in that the distance between the edge of the orthographic projection of the first covering portion on the driving back panel and the edge of the orthographic projection of the pixel defining portion on the driving back panel is less than 3 μm.
The display panel according to claim 11 is characterized in that the plurality of light-emitting units of different colors include a first light-emitting unit, a second light-emitting unit, and a third light-emitting unit, wherein the first light-emitting unit is red, the second light-emitting unit is green, and the third light-emitting unit is blue; the orthographic projection of the first filter unit on the driving back panel overlaps with the orthographic projection of the first light-emitting unit on the driving back panel; the orthographic projection of the second filter unit on the driving back panel overlaps with the orthographic projection of the second light-emitting unit on the driving back panel; and the orthographic projection of the third filter unit on the driving back panel overlaps with the orthographic projection of the third light-emitting unit on the driving back panel.
According to claim 1, the display panel further includes an encapsulation layer and a first touch control layer. The encapsulation layer is disposed on the side of the common electrode away from the driving backplate. The first touch control layer is disposed between the encapsulation layer and the first cover layer. The first touch control layer includes a plurality of first touch units, which are spaced apart. The first cover portion covers the first touch units, and the orthographic projection of the first touch unit on the driving backplate is located within the orthographic projection of the light-shielding portion on the driving backplate.

Description

Display panel and display device Cross-referencing This disclosure claims priority to Chinese Patent Application No. 202411523866.0, filed on October 29, 2024, entitled “Display Panel and Display Device,” the entire contents of which are incorporated herein by reference. Technical Field This invention relates to the field of display technology, and more specifically, to a display panel and a display device. Background Technology To improve the contrast of the display panel, a light path control layer can be set on the side of the light-emitting layer away from the driving backplate, thereby improving the light emission efficiency of the display panel at the front viewing angle. When the exposure and development process of the light-shielding layer was adjusted, a severe peeling problem occurred on the side of the first cover that was away from the driving back plate. This caused some light-transmitting openings to become larger, and the reflectivity of light in the larger light-transmitting openings increased, resulting in vertical stripes with alternating light and dark on the display panel. It should be noted that the information in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention The purpose of this invention is to overcome the shortcomings of the prior art and provide a display panel and display device. According to one aspect of the present invention, a display panel is provided, the display panel including a driving backplate, a pixel defining layer, a plurality of pixel electrodes, a plurality of light-emitting units of different colors, a common electrode, a first cover layer, a filter layer, a support layer, and a light-shielding layer. The pixel defining layer is disposed on one side of the driving backplate and includes a plurality of pixel defining portions, with pixel openings formed between the sides of the pixel defining portions that are close to each other. The plurality of pixel electrodes are respectively disposed in different pixel openings. The plurality of light-emitting units of different colors are respectively disposed on the side of each pixel electrode away from the driving backplate. The common electrode is disposed on the side of the plurality of light-emitting units away from the driving backplate. The first cover layer includes a plurality of first cover portions, the first cover portions being disposed on the side of the common electrode away from the driving backplate, the first cover portions being close to each other. A dimming opening is formed between the sides of the first cover, and the slope angle of the side of the first cover is less than 90 degrees. The filter layer includes filter units of different colors, each filter unit is disposed in a different dimming opening, the filter unit covers the side of the first cover, the orthographic projection of the filter unit on the drive back plate covers the orthographic projection of the light-emitting unit on the drive back plate, and the refractive index of the filter unit is greater than the refractive index of the first cover. The support layer includes multiple support parts, the support parts are disposed on the side of the first cover away from the drive back plate, the support parts are arranged around the dimming opening, and a support gap is formed between two adjacent support parts. The light-shielding layer includes multiple light-shielding parts, the light-shielding parts are disposed in the support gap, the light-shielding parts at least cover the side of the support parts, and a light-transmitting opening is formed between the sides of the light-shielding parts that are close to each other. In one embodiment of the present invention, the side of the support portion near the drive back plate is the first support surface, the side of the first cover portion away from the drive back plate is the first cover surface, and the edge of the first support surface near the filter unit is flush with the edge of the first cover surface near the filter unit. In one embodiment of the present invention, the angle between the side of the support portion and the side of the support portion near the drive back plate is 30 degrees to 50 degrees. In one embodiment of the present invention, the light-shielding portion extends from the side of the support portion to the side of the support portion away from the drive back plate. In one embodiment of the present invention, the light-shielding part and the side of the support part away from the drive back plate form an overlapping area, and the width of the overlapping area is more than 0.6 times the width of the side of the support part away from the drive back plate. In one embodiment of the present invention, the width of the side of the support portion away from the drive back plate