CN112271202B

CN112271202B - OLED display panel and display device

Info

Publication number: CN112271202B
Application number: CN202011169952.8A
Authority: CN
Inventors: 任怀森; 侯鹏; 王彦强; 杨钟; 唐天权
Original assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Current assignee: BOE Technology Group Co Ltd; Chengdu BOE Optoelectronics Technology Co Ltd
Priority date: 2020-10-28
Filing date: 2020-10-28
Publication date: 2023-06-09
Anticipated expiration: 2040-10-28
Also published as: CN112271202A

Abstract

The invention relates to the technical field of display, and discloses an OLED display panel and a display device, wherein the OLED display panel comprises: the structure comprises a substrate, a TFT device structure layer on the substrate, an anode layer arranged on the TFT structure layer and electrically connected with a source electrode and a drain electrode in the TFT structure layer, an organic electroluminescent device layer arranged on the anode layer, and a packaging layer arranged on the organic electroluminescent device layer and covering the substrate, wherein a plurality of insulating middle structure layers are arranged between the TFT device structure layer and the packaging layer, and at least one of the insulating middle structure layers is a extinction material layer. In the OLED display panel, at least one of the insulating intermediate structure layers between the TFT device structure layer and the packaging layer is set as the extinction material layer, so that interference light entering the display panel and reflected by the metal film layer on the substrate can be effectively eliminated, and adverse effects of the interference light on the performance of the display panel can be effectively avoided.

Description

OLED display panel and display device

Technical Field

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

Background

In the conventional OLED display panel, the metal film layer on the substrate reflects the light entering the display panel to form the interference light that adversely affects the internal device or the display surface state of the display panel, and adversely affects the performance of the display panel, so that the usability of the display panel is reduced, and therefore, how to eliminate the bad interference light in the display panel is needed to solve the problem currently.

Disclosure of Invention

The invention discloses an OLED display panel and a display device, wherein at least one of a plurality of insulating intermediate structure layers between a TFT device structure layer and a packaging layer is arranged as a extinction material layer, so that interference light entering the display panel and reflected by a metal film layer on a substrate can be effectively eliminated, and adverse effects of the interference light on the performance of the display panel can be effectively avoided.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an OLED display panel comprising:

the structure comprises a substrate, a TFT device structure layer, an anode layer, an organic electroluminescent device layer and a packaging layer, wherein the anode layer is arranged on the TFT structure layer and is electrically connected with a source electrode and a drain electrode in the TFT structure layer, the organic electroluminescent device layer is arranged on the anode layer, the packaging layer is arranged on the organic electroluminescent device layer and covers the substrate, a plurality of insulating middle structure layers are arranged between the TFT device structure layer and the packaging layer, and at least one layer of the insulating middle structure layers is an extinction material layer.

In the above OLED display panel, for convenience of description, the direction of the substrate to the encapsulation layer is taken as the upward direction. The OLED display panel comprises a substrate, a TFT device structure layer arranged on the substrate, an anode layer arranged on the TFT device structure layer and electrically connected with a source electrode and a drain electrode in the TFT device structure layer, an organic electroluminescent device layer arranged on the anode layer, a packaging layer arranged on the organic electroluminescent device layer and capable of protecting a functional film layer on the substrate, and a plurality of insulating middle structure layers arranged between the TFT device structure layer and the packaging layer, wherein each insulating middle structure layer is used for being arranged between two conductive functional film layers so as to isolate the two conductive functional film layers, at least one insulating middle structure layer among the plurality of insulating middle structure layers between the TFT device structure layer and the packaging layer is a extinction material layer, and the extinction material layer can eliminate light emitted on the extinction material layer, wherein the insulating middle structure layer is arranged as the extinction material layer, so that interference light entering the display panel and reflected by a metal film layer on the substrate can be effectively eliminated, and adverse effects of the interference light on the performance of the display panel can be effectively avoided.

Therefore, in the OLED display panel, at least one of the insulating intermediate structure layers between the TFT device structure layer and the packaging layer is set as the extinction material layer, so that interference light entering the display panel and reflected by the metal film layer on the substrate can be effectively eliminated, and adverse effects of the interference light on the performance of the display panel can be effectively avoided.

Optionally, the plurality of insulating intermediate structure layers include a planar layer located between the TFT device structure layer and the anode layer, and a pixel definition layer located at a peripheral side of the organic electroluminescent device layer.

Optionally, the pixel defining layer is the extinction material layer.

Optionally, a photosensitive device is arranged on the substrate, and the orthographic projection of the photosensitive device on the substrate is positioned between the orthographic projections of two adjacent sub-pixels on the substrate;

the flat layer is the extinction material layer, and a first light transmission structure is formed at a position corresponding to the photosensitive device in the flat layer.

Optionally, the pixel defining layer is the extinction material layer, and a second light-transmitting structure is formed at a portion corresponding to the photosensitive device in the pixel defining layer.

Optionally, a first metal wiring layer is arranged on the TFT device structure layer, and part of metal in the first metal wiring layer is electrically connected with an active layer in the TFT device structure layer to form a source electrode and a drain electrode of the TFT device structure layer; a first flat layer is arranged on the first metal wiring layer; a second metal wiring layer is arranged on the first flat layer and is electrically connected with the first metal wiring layer; a second flat layer is arranged on the second metal wiring layer, and the second metal wiring layer is electrically connected with the anode layer; wherein the first flat layer and the second flat layer constitute the flat layer, and the flat layer is a matting material layer.

Optionally, the matting material layer includes a laminated structure layer formed by color films of any two colors of red color film, green color film or blue color film.

Optionally, the matting material layer includes a laminated structure layer formed of a red color film and a blue color film.

Based on the same inventive concept, the invention also provides a display device, which comprises any OLED display panel provided by the technical scheme.

Drawings

Fig. 1 is a schematic diagram of a film structure of an OLED substrate according to an embodiment of the present invention:

fig. 2 is a schematic diagram of a film structure of an OLED substrate according to an embodiment of the present invention:

fig. 3 is a schematic diagram of a film structure of an OLED substrate according to an embodiment of the present invention:

fig. 4 is a schematic diagram of a film structure of an OLED substrate according to an embodiment of the present invention:

FIG. 5 is a partial top view of the OLED substrate of FIG. 2:

FIG. 6 is a schematic diagram of an anode layer of an OLED substrate reflecting ambient light in the prior art;

icon: 1-a substrate base; 2-TFT device structure layer; 3-an anode layer; 4-an organic electroluminescent device layer; 5-packaging layer; 6-a flat layer; 7-a pixel definition layer; 8-a photosensitive device; 9-a first light transmissive structure; 10-a second light transmissive structure; 11-a first metal wiring layer; 12-a second metal wiring layer; 13-a first planar layer; 14-a second planar layer; 15-sub-pixels.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

As shown in fig. 1 to 4, an embodiment of the present invention provides an OLED display panel, including: the structure comprises a substrate base plate 1, a TFT device structure layer 2 arranged on the substrate base plate 1, an anode layer 3 arranged on the TFT structure layer and electrically connected with a source electrode and a drain electrode in the TFT structure layer, an organic electroluminescent device layer 4 arranged on the anode layer 3, and a packaging layer 5 arranged on the organic electroluminescent device layer 4 and covering the substrate base plate 1, wherein a plurality of insulating intermediate structure layers are arranged between the TFT device structure layer 2 and the packaging layer 5, and at least one of the insulating intermediate structure layers is a extinction material layer.

Specifically, as shown in fig. 1, in the above-mentioned OLED display panel, the plurality of insulating intermediate structure layers include a flat layer 6 located between the TFT device structure layer 2 and the anode layer 3, and a pixel defining layer 7 located on the peripheral side of the organic electroluminescent device layer 4. The flat layer 6 is arranged above the TFT device structural layer 2, the anode layer 3 is arranged on the flat layer 6, a first via hole corresponding to the anode layer 3 is formed in the flat layer 6, and the anode layer 3 can be electrically connected with a source electrode and a drain electrode in the TFT device structural layer 2 through the first via hole; an organic electroluminescent device layer 4 is formed over the anode layer 3, and a pixel defining layer 7 is formed around the organic electroluminescent device layer 4.

Based on the above OLED display panel, the specific arrangement of the multiple insulating intermediate structure layers may have multiple selective arrangement modes, for example:

mode one:

as shown in fig. 1, the pixel defining layer 7 may be provided as a extinction material layer, and the pixel defining layer 7 is located at a peripheral side of the organic electroluminescent device layer, and may effectively absorb the bad light reflected by the anode layer 3; referring to fig. 6, in the prior art, since the anode layer 3 may have an uneven condition, when the display panel is in a screen-off state, due to the uneven anode, the color separation phenomenon may be easily caused due to different light exit angles after the ambient light is reflected by the anode layer 3, which may result in poor screen display area state when the display panel is in the screen-off state; in this embodiment, the pixel defining layer 7 is set to be a extinction material layer, so that light reflected by the anode layer 3 can be effectively absorbed, color separation phenomenon in the display panel at the screen-off state is avoided, a color film layer corresponding to the organic electroluminescent device layer and a black matrix which is arranged on the same layer as the color film layer and is positioned around the color film layer are arranged on the packaging layer 5, the pixel defining layer 7 is set to be a extinction material layer, light reflected by the anode layer 3 is absorbed, and color separation phenomenon generated by diffraction of external light at the opening edge of the black matrix and the edge of the pixel defining layer 7 after the external light enters the display panel and is reflected by the anode layer 3 can be avoided, so that the overall performance of the display panel is effectively improved.

Mode two:

as shown in fig. 2 and fig. 5, in the above-mentioned OLED display panel, a photosensitive device 8 is disposed on a substrate 1, and the orthographic projection of the photosensitive device 8 on the substrate 1 is located between the orthographic projections of two adjacent sub-pixels 15 on the substrate 1; the flat layer 6 is set as a extinction material layer, and a first light transmission structure 9 is formed at a position, corresponding to the photosensitive device 8, in the flat layer 6, so that external light can be emitted onto the photosensitive device 8, the photosensitive device 8 is arranged on the substrate 1, and light emitted by the organic electroluminescent device layer 4 can enter the display panel to be received by the photosensitive device 8 through finger reflection for fingerprint identification, wherein the flat layer 6 is set as the extinction material layer, interference light formed through reflection of a metal layer below the flat layer 6 on the substrate 1 can be effectively absorbed, interference light formed through reflection of the metal layer is prevented from being irradiated onto the photosensitive device 8 to form interference on the photosensitive device 8, the function of the photosensitive device 8 is effectively prevented from being influenced by the interference light, adverse effects of the interference light on the fingerprint identification function of the display panel are avoided, and accordingly the performance of the display panel is effectively improved.

Specifically, as shown in fig. 3, on the basis of the second mode, the pixel defining layer 7 is set as a extinction material layer, and the portion corresponding to the photosensitive device 8 in the pixel defining layer 7 forms a second light transmission structure 10, where the second light transmission structure 10 is opposite to the first light transmission structure 9, so that a channel for allowing external light to enter the display panel and irradiate onto the photosensitive device 8 can be formed, where the pixel defining layer 7 is also set as the extinction material layer, eliminating interference light reflected by the metal layer below the flat layer 6, and eliminating interference light reflected by the anode layer 3, so that unwanted bad light in the display panel can be better eliminated, influence of interference light in the display panel on performance of the display panel is avoided, sensing accuracy of the photosensitive device 8 is guaranteed to improve fingerprint identification effect of the display panel, color separation phenomenon during screen information of the display panel is improved, and overall performance of the display panel is effectively improved.

Mode three:

as shown in fig. 4, in the OLED display panel, in order to reduce the routing resistance, a structure of a double-layer to-point routing layer is provided on the substrate 1, wherein a first metal routing layer 11 is provided on the TFT device structural layer 2, and part of metal in the first metal routing layer 11 is electrically connected with an active layer in the TFT device structural layer 2 to form a source and a drain of the TFT device structural layer 2; the first metal wiring layer 11 is provided with a first flat layer 13; the first flat layer 13 is provided with a second metal wiring layer 12, and the second metal wiring layer 12 is electrically connected with the first metal wiring layer 11; the second metal wiring layer 12 is provided with a second flat layer 14, and the second metal wiring layer 12 is electrically connected with the anode layer 3; the first flat layer 13 and the second flat layer 14 form the flat layer 6, and the flat layer 6 is a matting material layer, where the first flat layer 13 and the second flat layer 14 may be respectively provided as a matting material layer, or the matting material layer may be formed after the combination of the first flat layer 13 and the second flat layer 14.

Specifically, on the basis of the OLED display panel, the extinction material layer comprises a laminated structure layer formed by color films of any two colors of red color film, green color film or blue color film, and the laminated structure layer is not made of black materials, so that the technical problems of difficult alignment and the like in the preparation process are avoided, the preparation is convenient, the laminated structure layer of any two of the red color film, the green color film or the blue color film can eliminate light rays irradiated on the laminated structure layer, the red color film, the green color film and the blue color film are common three-primary color film layers, the preparation process is mature, and the laminated structure layer is used for forming the extinction material layer, is favorable for process preparation, and has stable performance.

Specifically, in order to achieve a better extinction effect, the extinction material layer is set to be a laminated structure layer formed by a red color film and a blue color film, and it should be noted that, for the setting order of the red color film and the blue color film in the display panel, the red color film may be set down, the blue color film may be set up, or the blue color film may be set down, and the red color film may be set up.

In the third embodiment, as shown in fig. 4, in the structure in which the first flat layer 13 and the second flat layer 14 are combined to form the extinction material layer, the first flat layer 13 may be a red color film, the second flat layer 14 may be a blue color film, or the first flat layer 13 may be a blue color film, the second flat layer 14 may be a red color film, and the first flat layer 13 and the second flat layer 14 may be combined to cooperate to form the extinction material layer having an extinction effect, so that the extinction material layer may not only have an effect of eliminating interference light, but also the first flat layer 13 and the second flat layer 14 may each have a function of insulating up-and-down conductive film layers, thereby saving the manufacturing process.

Specifically, in the above-described OLED display panel, the thickness dimension of any one of the single-layer red color film, the single-layer green color film, and the single-layer blue color film in the direction perpendicular to the substrate 1 is 1.5 μm or more and 3 μm or less, wherein the thickness may be set to 1.6 μm, 1.8 μm, 1.9 μm, 2.3 μm, 2.5 μm, or 2.7 μm, and the present embodiment is not limited.

Based on the same inventive concept, the embodiment of the present invention also provides a display device, including any one of the OLED display panels provided in the above embodiment.

It will be apparent to those skilled in the art that various modifications and variations can be made to the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.

Claims

1. An OLED display panel, comprising:

the organic light-emitting diode display comprises a substrate, a TFT device structure layer, an anode layer, an organic light-emitting device layer, a packaging layer, a color film layer and a black matrix, wherein the TFT device structure layer is arranged on the substrate and is electrically connected with a source electrode and a drain electrode in the TFT structure layer; the plurality of insulating intermediate structure layers comprise pixel definition layers positioned on the periphery of the organic electroluminescent device layer and flat layers positioned between the TFT device structure layers and the anode layers, wherein the pixel definition layers and the flat layers are extinction material layers; the extinction material layer comprises a laminated structure layer formed by color films of any two colors of red color films, green color films or blue color films;

the planarization layer comprises a first planarization layer and a second planarization layer; setting the first flat layer as a red color film and the second flat layer as a blue color film when the first flat layer and the second flat layer are combined to form the matting material layer; alternatively, the first planarization layer is set as a blue color film, and the second planarization layer is set as a red color film.

2. The OLED display panel according to claim 1, wherein the substrate is provided with a light sensor, and the orthographic projection of the light sensor on the substrate is located between orthographic projections of two adjacent sub-pixels on the substrate;

3. The OLED display panel according to claim 2, wherein the pixel defining layer is the extinction material layer, and a portion of the pixel defining layer corresponding to the photosensitive device forms a second light-transmitting structure.

4. The OLED display panel of claim 1, wherein a first metal trace layer is disposed on the TFT device structure layer, and a portion of metal in the first metal trace layer is electrically connected to an active layer in the TFT device structure layer to form a source and a drain of the TFT device structure layer; a first flat layer is arranged on the first metal wiring layer; a second metal wiring layer is arranged on the first flat layer and is electrically connected with the first metal wiring layer; the second metal wiring layer is provided with a second flat layer, and the second metal wiring layer is electrically connected with the anode layer.

5. A display device comprising an OLED display panel as claimed in any one of claims 1-4.