CN116113263A - Display panel and display device - Google Patents

Abstract

The invention discloses a display panel and a display device, wherein the display panel is provided with a first display area and a second display area at least partially arranged around the first display area, the light transmittance of the first display area is larger than that of the second display area, and the display panel comprises: the light-emitting layer comprises first electrodes which are arranged at intervals, and the light-emitting layer is provided with a light-emitting side and a backlight side which are opposite; the functional film layer is arranged on the backlight side of the light-emitting layer; the anti-reflection parts are arranged on the functional film layer and are positioned in the first display area, the orthographic projection of each anti-reflection part on the light-emitting layer at least partially covers the first electrode, and the orthographic projection of each anti-reflection part on the light-emitting layer at least partially covers the first electrode so as to weaken or eliminate abnormal light reflected from the first electrode by utilizing the anti-reflection parts.

Description

Display panel and display device

Technical Field

The invention belongs to the technical field of electronic products, and particularly relates to a display panel and a display device.

Background

With the progress of technology, digital display devices such as smart phones and tablet computers are widely used, wherein a display panel is an indispensable interpersonal communication interface in these display devices. The OLED (Organic Light Emitting Diode) display panel has the advantages of self-luminescence, energy conservation, consumption reduction, flexibility, good flexibility and the like, does not need a backlight source, has the characteristics of high reaction speed and good display effect, is focused by users, and is widely applied to terminal products such as smart phones, tablet computers and the like. For electronic products, the arrangement of optical elements such as a front camera and the like inevitably occupies a certain space, so that the screen occupation ratio is affected.

In order to increase the screen duty cycle, however, a full screen is implemented, and researchers consider the implementation of the under-screen optical element. The optical element is arranged below the film layer where the light-emitting device of the display panel is located, namely the optical element is arranged in the display area, but is limited by the existing film layer structure of the display panel, and light entering the display panel from the outside can generate reflected light at the opaque film layer of the display panel, so that the normal operation of the optical element is affected.

Therefore, a new display panel and display device are needed.

Disclosure of Invention

The embodiment of the invention provides a display panel and a display device, wherein the front projection of each anti-reflection part on a light-emitting layer at least partially covers a first electrode, so that abnormal light reflected from the first electrode is weakened or eliminated by the anti-reflection part, and when an optical element is arranged in a first display area, the abnormal light reflected by the part can be prevented from entering the optical element, and the working effect of the optical element is effectively improved.

In one aspect, a display panel is provided, which has a first display area and a second display area at least partially surrounding the first display area, where a light transmittance of the first display area is greater than a light transmittance of the second display area, and the display panel includes: the light-emitting device comprises a light-emitting layer, a light-emitting layer and a light-emitting layer, wherein the light-emitting layer comprises first electrodes which are arranged at intervals and provided with opposite light-emitting sides and backlight sides; a functional film layer provided on the backlight side of the light-emitting layer; the anti-reflection parts are arranged on the functional film layer and are positioned in the first display area, and orthographic projection of each anti-reflection part on the light-emitting layer at least partially covers the first electrode.

According to an aspect of the present invention, the functional film layer includes a substrate and an array layer which are stacked in a light emitting direction along the light emitting layer; the anti-reflection part is at least arranged on any one film layer of the substrate and the array layer; preferably, the functional film layer further comprises a supporting layer, and the supporting layer is arranged on one side of the substrate, which is away from the array layer; the anti-reflection part is at least arranged on any one film layer of the supporting layer, the substrate and the array layer.

According to one aspect of the invention, the substrate includes opposing first and second surfaces, the first surface being disposed proximate the support layer relative to the second surface, at least one of the first and second surfaces having a non-planar surface, the anti-reflective portion including the non-planar surface.

According to one aspect of the invention, the support layer includes opposing third and fourth surfaces, the third surface being disposed away from the substrate relative to the fourth surface, at least one of the third and fourth surfaces having a non-planar surface, the anti-reflective portion including the non-planar surface.

According to one aspect of the invention, the non-planar surface has an interface roughness greater than or equal to 0.5 μm.

According to one aspect of the invention, the non-planar surface is wavy or saw-tooth shaped.

According to one aspect of the invention, the anti-reflection part comprises a light absorption layer, and the light absorption layer is arranged on one side surface of the supporting layer, which is away from the substrate.

According to one aspect of the present invention, the material of the light absorbing layer includes at least one of a black organic material and an ink.

According to one aspect of the present invention, the orthographic projection of each anti-reflection part on the light-emitting layer is respectively overlapped with the corresponding first electrode.

Another aspect of an embodiment of the present invention provides a display apparatus, including: a display panel, wherein the display panel is the display panel in any embodiment; the optical element is arranged corresponding to the first display area of the display panel.

Compared with the prior art, the display panel provided by the embodiment of the invention comprises the luminous layer, the functional film layer and the anti-reflection part, wherein the optical element is arranged in the first display area, and when the optical element works, external light enters the optical element through the first display area. Due to the existence of each film layer interface of the functional film layer, partial reflection of light can occur at the film layer interface. In addition, some of the light is reflected by the lens on the optical element. These reflections will strike the opposite side of the first electrode of the first display area upwards, be reflected by the first electrode, re-enter the optical element. The reflected light is used as an abnormal light, and may interfere with the optical element. Therefore, in order to solve the above-mentioned problem, in the embodiment of the present invention, the front projection of each anti-reflection portion on the light emitting layer at least partially covers the first electrode, so that the abnormal light reflected from the first electrode is reduced or eliminated by using the anti-reflection portion, and when the optical element is disposed in the first display area, the abnormal light reflected by the part can be prevented from entering the optical element, and the working effect of the optical element is effectively improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

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

FIG. 2 is a diagram of a film structure provided by one embodiment at B-B in FIG. 1;

FIG. 3 is a diagram of a film structure provided by another embodiment at B-B in FIG. 1;

FIG. 4 is a diagram of a film structure provided by another embodiment at B-B in FIG. 1;

FIG. 5 is a diagram of a film structure provided by yet another embodiment at B-B in FIG. 1;

FIG. 6 is a diagram of a film structure provided by another embodiment at B-B in FIG. 1.

In the accompanying drawings:

1-a light emitting layer; 11-a first electrode; 12-a layer of luminescent material; 13-a second electrode; 2-a functional film layer; 21-a support layer; 22-a substrate; 23-an array layer; a 3-antireflection portion; 4-an optical element; a 5-pixel definition layer; 6-planarizing the layer; a TFT-thin film transistor; y-active layer; s-source electrode; d-drain electrode; a G-gate; AA 1-a first display area; AA 2-second display area.

Detailed Description

Features and exemplary embodiments of various aspects of the invention are described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the invention by showing examples of the invention.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises an element.

The display panel provided by the embodiment of the invention can be an Organic Light-Emitting Diode (OLED) display panel, a liquid crystal panel or a Micro-plane display panel (Micro-OLED or Micro-LED) and the like. The following examples are given by taking the display panel as an OLED display panel as an example.

For a better understanding of the present invention, a display panel and a display device according to embodiments of the present invention are described in detail below with reference to fig. 1 to 6.

Referring to fig. 1 to 2, fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the invention; FIG. 2 is a diagram of a film structure provided by one embodiment at B-B in FIG. 1.

The embodiment of the invention provides a display panel, which is provided with a first display area AA1 and a second display area AA2 at least partially arranged around the first display area AA1, wherein the light transmittance of the first display area AA1 is larger than that of the second display area AA2, and the display panel comprises: the light-emitting layer 1, the light-emitting layer 1 includes first electrodes 11 arranged at intervals, the light-emitting layer 1 has opposite light-emitting sides and backlight sides; a functional film layer 2 provided on the backlight side of the light-emitting layer 1; the anti-reflection parts 3, the anti-reflection parts 3 are arranged on the functional film layer 2 and are positioned in the first display area AA1, and the orthographic projection of each anti-reflection part 3 on the light-emitting layer 1 at least partially covers the first electrode 11.

The display panel provided by the embodiment of the invention comprises the light-emitting layer 1, the functional film layer 2 and the anti-reflection parts 3, wherein the front projection of each anti-reflection part 3 on the light-emitting layer 1 at least partially covers the first electrode 11, so that abnormal light reflected from the first electrode 11 is weakened or eliminated by the anti-reflection parts 3, and when the optical element 4 is arranged in the first display area AA1, the abnormal light reflected by the part can be prevented from entering the optical element 4, and the working effect of the optical element 4 is effectively improved.

It should be noted that, the first display area AA1 is a light-transmitting area for setting the optical element 4 such as a camera, and the light transmittance of the first display area AA1 is greater than that of the second display area AA2, so that the corresponding optical element 4 receives enough light entering amount, and the imaging effect is ensured.

When the camera works, external light enters the camera through the first display area AA 1. Due to the existence of the respective film interfaces of the functional film layer 2, the film interfaces may be partially reflective. In addition, some light is reflected by the lens on the camera. These reflections will strike the opposite side of the first electrode 11 of the first display area AA1 upwards, be reflected by the first electrode 11, re-enter the camera. The reflected light is used as abnormal light, and can interfere shooting of the camera, so that the self-shooting effect of the camera is reduced. Therefore, in order to solve the above-mentioned problems, in the embodiment of the present invention, the anti-reflection portions 3 are disposed in the functional film layer 2 below the first electrode 11, so that the front projection of each anti-reflection portion 3 on the light-emitting layer 1 at least partially covers the first electrode 11, so as to more accurately block the reflected light of the first electrode 11, avoid the interference of the abnormal light reflected by the portion on the camera, and ensure the photographing effect of the camera.

The first electrode 11 is an electrode having a material capable of reflecting light, for example, the first electrode 11 may include a single layer of metal, for example, silver, gold, or other materials with better conductivity, or may be a composite material, for example, ITO (Indium Tin Oxide) -silver-ITO, and since the reflection effect of the first electrode 11 is strong, part of the light incident into the display panel may be reflected to the direction of the camera at the first electrode 11, and therefore the anti-reflection portion 3 needs to be provided to block the reflected light of the first electrode 11.

Referring to fig. 2 and 3, optionally, the light emitting layer 1 further includes a light emitting material layer 12 and a second electrode 13 disposed on a side of the first electrode 11 facing away from the functional film layer 2, and the material of the second electrode 13 is generally a material with a lower work function so as to facilitate electron injection, and in addition, heat generated during operation can be reduced, so that the service life of the OLED device is prolonged. The material of the second electrode 13 may be one of metallic materials such as silver (Ag), aluminum (Al), lithium (Li), magnesium (Mg), ytterbium (Yb), calcium (Ca), or indium (In), and an alloy of the foregoing metallic materials, such as magnesium-silver alloy (Mg/Ag), lithium-aluminum alloy (Li/Al), to which the present embodiment is not limited.

Optionally, the display panel further includes a pixel defining layer 5, where the pixel defining layer 5 includes a pixel opening, at least a portion of the first electrode 11 is exposed from the pixel opening, and the material of the pixel defining layer 5 may be hexamethyldisiloxane, epoxy resin or Polyimide (PI), or may be a silicon-based adhesive material with a light transmittance of more than 90%, or another organic adhesive material with a light transmittance slightly lower (greater than 80%) and a slightly higher bending strength, which is not limited in this embodiment.

In some alternative embodiments, the functional film layer 2 includes a substrate 22 and an array layer 23 that are stacked in the light emitting direction along the light emitting layer 1; the antireflection portion 3 is provided on at least one of the substrate 22 and the array layer 23.

The anti-reflection portion 3 may be directly formed on any one of the substrate 22 and the array layer 23, that is, the anti-reflection portion 3 may be directly formed on any one of the substrate 22 and the array layer 23, or the anti-reflection portion 3 may be formed by performing a roughness treatment or a patterning treatment on a surface of a certain one of the substrate 22 and the array layer 23 by a process such as a laser etching process or a solution etching process, so as to perform a function of scattering reflected light. The antireflection portion 3 may be a film layer formed separately, and may be, for example, a black film layer capable of absorbing reflected light.

Optionally, the functional film layer 2 further includes a supporting layer 21, where the supporting layer 21 is disposed on a side of the substrate 22 facing away from the array layer 23; similarly, the anti-reflection portion 3 is at least provided on any one of the support layer 21, the substrate 22, and the array layer 23, and it should be noted that the anti-reflection portion 3 in this embodiment is at least provided on any one of the support layer 21, the substrate 22, and the array layer 23, which means that the anti-reflection portion 3 may be formed on at least one side surface of the support layer 21, the substrate 22, and the array layer 23, that is, the anti-reflection portion 3 is a part of the support layer 21, the substrate 22, and the array layer 23. The antireflection portion 3 may be provided on one side of the support layer 21, the substrate 22, and the array layer 23 alone, and is not particularly limited.

Wherein, the substrate 22 may be a hard substrate, such as a glass substrate; the flexible substrate can also be made of polyimide, polystyrene, polyethylene terephthalate, parylene, polyethersulfone or polyethylene naphthalate. The substrate 22 is used primarily to support devices disposed thereon and may be multi-layered.

The supporting layer 21 can be made of PI (Polyimide) material, and has the properties of high temperature resistance and good stability.

Referring to fig. 3, the array layer 23 includes a pixel circuit and a plurality of insulating layers, the pixel circuit includes a plurality of thin film transistors TFT, the thin film transistors TFT includes an active layer Y, a gate electrode G, a source electrode S, a drain electrode D, a source electrode S, and a gate electrode G, and the material of the thin film transistors TFT may include one or more of molybdenum, titanium, aluminum, copper, and the like. The gate electrode G of the thin film transistor TFT is generally used to receive a control signal, so that the thin film transistor TFT is turned on or off under the control of the control signal. One of the source S and the drain D of the thin film transistor is connected to the first electrode 11 to control normal light emission of the light emitting layer 1.

Optionally, the array layer 23 further includes a planarization layer 6 disposed between the pixel circuit and the light emitting layer 1, where the planarization layer 6 may be made of the same organic material as the pixel defining layer 5, such as epoxy resin, polyimide, and the like, and since the planarization of the organic material is better, by disposing the planarization layer 6, the planarization of the light emitting layer 1 disposed on the planarization layer 6 can be improved, and the light emitting effect can be ensured.

Referring to fig. 2 and 4, in some alternative embodiments, the substrate 22 includes opposite first and second surfaces, the first surface being disposed adjacent to the support layer 21 with respect to the second surface, at least one of the first and second surfaces having a non-planar surface, and the anti-reflective portion 3 includes the non-planar surface.

It should be noted that, due to the non-flat surface, when the reflected light of the first electrode 11 irradiates the non-flat surface, scattering occurs at the non-flat surface, that is, when the curvature of the non-flat surface irradiated by the reflected light is large or even not smooth, the reflected light disperses and propagates away from the original direction, and the reflected light irradiates the direction of the first electrode 11 again, so that the reflected light of the first electrode 11 is effectively reduced or prevented from directly irradiating the optical element 4, and the normal operation of the optical element 4 is ensured.

The uneven surface may be understood as a surface with a concave-convex shape, so that the emitted light is scattered at the uneven surface, and the uneven surface may specifically adjust the roughness of the corresponding position of the first surface or the second surface of the substrate 22 by using a laser etching method, so as to meet the requirement of scattering. Optionally, the interface roughness Ra of the non-flat surface is greater than or equal to 0.5 μm, so as to ensure a scattering effect, and weaken the reflected light entering the camera, so as to improve the shooting effect of the camera, such as a self-shooting effect.

In some alternative embodiments, the non-flat surface is wavy or zigzag, and other shapes may be suitable for ease of preparation, and the reflected light of the first electrode 11 may be scattered/refracted in the direction of the non-flat surface, i.e. in the direction of or around the first electrode 11, as long as the reflected light of the first electrode 11 is blocked from being directed towards the optical element 4 located below the supporting layer 21.

In addition to forming the anti-reflection portion 3 on the substrate 22, the anti-reflection portion 3 may be disposed on the support layer 21, and optionally, referring to fig. 3 and 5, the support layer 21 includes opposite third and fourth surfaces, the third surface being disposed away from the substrate 22 with respect to the fourth surface, at least one of the third and fourth surfaces having a non-planar surface, and the anti-reflection portion 3 includes the non-planar surface.

It will be appreciated that since the third surface is disposed away from the substrate 22 relative to the fourth surface, the substrate 22 is not affected when the uneven surface is formed on the third surface, and the preparation is more convenient, and since the anti-reflection portion 3 may affect the light that normally enters the optical element 4, only one of the third surface and the fourth surface is required to be formed, and the uneven surface is not required to be formed on both of the third surface and the fourth surface. The positions of the antireflection portions 3 are shown only in the drawings, and do not represent the actual sizes thereof.

In addition to the above-described roughness or patterning treatment of the surface of any one of the support layer 21, the substrate 22, and the array layer 23 by means of laser light or the like, the antireflection portion 3 may be formed in a single layer.

For example, referring to fig. 6, the anti-reflection portion 3 includes a light absorbing layer disposed on a surface of the supporting layer 21 facing away from the substrate 22. It can be understood that the light absorbing layer is disposed on the surface of the supporting layer 21 opposite to the substrate 22, so that the influence of the light absorbing layer on the flatness of other film layers can be avoided, and the electrical characteristics of the pixel circuit of the array layer 23 can not be influenced, thereby ensuring the display effect of the display panel.

The light absorption layer is a film layer made of light absorption materials, the light absorption materials are light rays irradiated on things, no transmission exists outside illumination, mapping and massive flare and reflection are not generated, and part of light rays are diffusely reflected after the light rays are absorbed, so that the regular light and shade level is maintained. In this embodiment, the light reflected from the first electrode 11 is absorbed by the light absorbing layer to attenuate the reflected light entering the lower optical element 4.

Optionally, the material of the light absorbing layer includes at least one of a black organic material and an ink. For example, an organic resin material, black chrome, or the like, is not particularly limited as long as the light absorbing effect is satisfied, and any material can be applied to the light absorbing layer provided in the embodiment of the present invention.

Meanwhile, the anti-reflection part 3 may be formed in a light absorbing layer, and the anti-reflection part 3 may be formed in a non-flat surface structure, that is, a non-flat surface may be formed on at least one of the first surface, the second surface, the third surface and the fourth surface at the same time, so as to serve as the anti-reflection part 3, thereby further enhancing the anti-reflection effect of the anti-reflection part 3.

In some alternative embodiments, the orthographic projection of each anti-reflection part 3 on the light-emitting layer 1 is respectively overlapped with the corresponding first electrode 11.

It should be noted that, since the first electrode 11 is usually made of an opaque material, that is, the display panel is opaque at the first electrode 11, the orthographic projection of each anti-reflection portion 3 on the light emitting layer 1 is respectively overlapped with the corresponding first electrode 11, that is, the positions of the anti-reflection portion 3 and the first electrode 11 are the same in the direction along the plane of the vertical substrate 22, and the shapes and dimensions of the two are the same, so that the anti-reflection portion 3 is prevented from additionally increasing the opaque area of the display panel relative to the first electrode 11, and normal light entering of the optical element 4 is ensured.

The embodiment of the invention also provides a display device, which comprises: a display panel, wherein the display panel is the display panel in any embodiment; the optical element 4 is disposed corresponding to the first display area AA1 of the display panel. In this embodiment, the optical element 4 may be a camera, a fingerprint recognition element, a distance sensor, or the like that needs light to work. The optical element 4 is disposed on the backlight side of the display panel to avoid affecting the normal display of the display panel.

According to the display device provided by the embodiment of the invention, the anti-reflection parts 3 are arranged in the first display area AA1 of the display panel, and the front projection of each anti-reflection part 3 on the light-emitting layer 1 at least partially covers the first electrode 11, so that abnormal light reflected from the first electrode 11 is weakened or eliminated by the anti-reflection parts 3, and when the optical element 4 is arranged in the first display area AA1, the abnormal light reflected by the part can be prevented from entering the optical element 4, and the working effect of the optical element 4 is effectively improved.

The display device provided in the embodiment of the present invention has the technical effects of the technical solution of the display panel in any of the foregoing embodiments, and the explanation of the same or corresponding structure and terms as those of the foregoing embodiments is not repeated herein.

The display device provided by the embodiment of the invention can be applied to a mobile phone and can also be 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, medical equipment, industrial control equipment, touch interactive terminal, etc., which are not particularly limited in this embodiment of the invention.

In the foregoing, only the specific embodiments of the present invention are described, and it will be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the systems, modules and units described above may refer to the corresponding processes in the foregoing method embodiments, which are not repeated herein. It should be understood that the scope of the present invention is not limited thereto, and any equivalent modifications or substitutions can be easily made by those skilled in the art within the technical scope of the present invention, and they should be included in the scope of the present invention.

It should also be noted that the exemplary embodiments mentioned in this disclosure describe some methods or systems based on a series of steps or devices. However, the present invention is not limited to the order of the above-described steps, that is, the steps may be performed in the order mentioned in the embodiments, or may be performed in a different order from the order in the embodiments, or several steps may be performed simultaneously.

Claims (10)

1. A display panel having a first display region and a second display region disposed at least partially around the first display region, the first display region having a light transmittance that is greater than a light transmittance of the second display region, the display panel comprising:

the light-emitting device comprises a light-emitting layer, a light-emitting layer and a light-emitting layer, wherein the light-emitting layer comprises first electrodes which are arranged at intervals and provided with opposite light-emitting sides and backlight sides;

a functional film layer provided on the backlight side of the light-emitting layer;

the anti-reflection parts are arranged on the functional film layer and are positioned in the first display area, and orthographic projection of each anti-reflection part on the light-emitting layer at least partially covers the first electrode.

2. The display panel according to claim 1, wherein the functional film layer includes a substrate and an array layer which are stacked in a light-emitting direction along the light-emitting layer;

the anti-reflection part is at least arranged on any one film layer of the substrate and the array layer;

preferably, the functional film layer further comprises a supporting layer, and the supporting layer is arranged on one side of the substrate, which is away from the array layer; the anti-reflection part is at least arranged on any one film layer of the supporting layer, the substrate and the array layer.

3. The display panel of claim 2, wherein the substrate comprises opposing first and second surfaces, the first surface disposed proximate the support layer relative to the second surface, at least one of the first and second surfaces having a non-planar surface, the anti-reflective portion comprising the non-planar surface.

4. The display panel of claim 2, wherein the support layer includes opposing third and fourth surfaces, the third surface being disposed away from the substrate relative to the fourth surface, at least one of the third and fourth surfaces having a non-planar surface, the anti-reflective portion including the non-planar surface.

5. A display panel according to claim 3, wherein the non-planar surface has an interface roughness of greater than or equal to 0.5 μm.

6. A display panel according to claim 3, wherein the non-planar surface is wavy or saw-tooth shaped.

7. The display panel according to any one of claims 2 to 4, wherein the anti-reflection portion includes a light absorbing layer provided on a side surface of the support layer facing away from the substrate.

8. The display panel according to claim 7, wherein the material of the light absorbing layer includes at least one of a black organic material and an ink.

9. The display panel according to claim 1, wherein orthographic projections of the antireflection portions on the light-emitting layer overlap with the corresponding first electrodes, respectively.

10. A display device, comprising:

a display panel according to any one of claims 1 to 9;

the optical element is arranged corresponding to the first display area of the display panel.

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