CN116261361A - Display panel and display device - Google Patents

Abstract

The disclosure provides a display panel and a display device, belongs to the technical field of display, and can solve the problem that light rays in the existing display panel are emitted from a large visual angle in a certain direction to influence the display effect. The display panel of the present disclosure includes: a substrate, a pixel defining layer on the substrate; the pixel limiting layer is provided with a plurality of pixel openings which are arranged in an array manner; the areas of the first sub-pixel opening and the second sub-pixel opening are smaller than the area of the third sub-pixel opening, and the first sub-pixel opening and the second sub-pixel opening are arranged on the same side of the third sub-pixel opening; at least one of the first, second, and third sub-pixel openings has a center, a portion located at one side of the center in the column direction has a first length in the row direction, and a portion located at one side of the center in the row direction has a second length in the column direction, the first length being smaller than the second length.

Description

Display panel and display device

Technical Field

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

Background

An Organic Light-Emitting Diode (OLED) is a Light-Emitting device using an Organic solid semiconductor as a Light-Emitting material, and has the advantages of simple preparation process, low cost, low power consumption, high Light-Emitting brightness, wide application range of working temperature and the like, so that the OLED has a wide application prospect.

At present, an OLED display panel is mounted on a high-end automobile to perform man-machine interaction, but when the OLED display panel performs vehicle-mounted display, the OLED display panel has higher requirements on reliability and vehicle safety, so that higher requirements are put on the design of the current OLED display panel.

Disclosure of Invention

The disclosure aims to at least solve one of the technical problems in the prior art, and provides a display panel and a display device.

In a first aspect, embodiments of the present disclosure provide a display panel including: a substrate, a pixel defining layer on the substrate; the pixel limiting layer is provided with a plurality of pixel openings which are arranged in an array manner; the pixel opening includes: a first sub-pixel opening, a second sub-pixel opening, and a third sub-pixel opening; the area of the third sub-pixel opening is larger than that of the first sub-pixel opening and the second sub-pixel opening, and the first sub-pixel opening and the second sub-pixel opening are arranged on the same side of the third sub-pixel opening;

at least one of the first sub-pixel opening, the second sub-pixel opening, and the third sub-pixel opening has a center, a portion located at one side of the center in the column direction has a first length in the row direction, and a portion located at one side of the center in the row direction has a second length in the column direction, the first length being smaller than the second length.

Optionally, edges of the first sub-pixel opening, the second sub-pixel opening and the third sub-pixel opening are at least partially bent toward a center direction along a column direction.

Optionally, the display panel further includes: a plurality of light emitting devices arranged in one-to-one correspondence with the plurality of pixel openings;

the light emitting device includes: a first electrode and a second electrode disposed opposite to each other, and a light emitting layer between the first electrode and the second electrode;

the first electrode includes: a reflective electrode; the reflective electrode covers at least the bottom and the side of the pixel opening.

Optionally, the display panel further includes: the packaging layer is positioned at one side of the second electrode, which is away from the substrate, and the shading layer is positioned at one side of the packaging layer, which is away from the substrate;

the orthographic projection of the shading layer on the substrate falls on the edge of the orthographic projection of the pixel opening on the substrate.

Optionally, the first electrode further comprises: a first transparent electrode and a second transparent electrode;

the first transparent electrode is positioned on one side of the reflecting electrode close to the pixel limiting layer and at least partially exposed by the pixel opening;

the second transparent electrode covers the reflective electrode.

Optionally, the material of the reflective electrode includes: silver; the materials of the first transparent electrode and the second transparent electrode each include: indium tin oxide.

Optionally, the reflective electrode also covers part of the pixel defining layer; the display panel further includes: an auxiliary pixel defining layer positioned on a side of the reflective electrode facing away from the substrate; the color of the auxiliary pixel defining layer is black;

the orthographic projection of the auxiliary pixel defining layer on the substrate falls on an edge of the orthographic projection of the pixel opening on the substrate.

Optionally, the thickness of the auxiliary pixel defining layer is less than the thickness of the pixel defining layer.

Optionally, the display substrate further includes: a passivation layer located between the auxiliary pixel defining layer and the reflective anode;

the passivation layer wraps around the edge of the reflective anode.

Optionally, the light shielding layer includes: black matrix or antireflection film.

In a second aspect, embodiments of the present disclosure provide a display device including a display panel as provided above.

Drawings

Fig. 1 is a schematic view of an application scenario of a display panel.

Fig. 2 is a schematic structural diagram of a display panel according to an embodiment of the disclosure.

Fig. 3a, 3b, 3c, and 3d are schematic top view structures of pixel openings in the display panel shown in fig. 2.

Fig. 4 is a schematic structural diagram of another display panel according to an embodiment of the disclosure.

Fig. 5 is a schematic structural diagram of another display panel according to an embodiment of the disclosure.

Detailed Description

In order that those skilled in the art will better understand the technical solutions of the present disclosure, the present disclosure will be described in further detail with reference to the accompanying drawings and detailed description.

Unless defined otherwise, technical or scientific terms used in this disclosure should be given the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first," "second," and the like, as used in this disclosure, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Likewise, the terms "a," "an," or "the" and similar terms do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", etc. are used merely to indicate relative positional relationships, which may also be changed when the absolute position of the object to be described is changed.

Fig. 1 is a schematic view of an application scenario of a display panel, as shown in fig. 1, where the display panel may specifically be a vehicle-mounted display, and a user may control or navigate an automobile through inputting an instruction through the vehicle-mounted display. In order to avoid that the light of a large viewing angle of the display panel of the vehicle-mounted display is reflected and imaged through the front windshield during night driving or in severe weather, the sight of a driver is affected, and driving risks are caused, it is desirable that the light emitted from the display panel along the Z direction is blocked. Therefore, in the integrated design process of the display panel, the light emitting device in the local area can be subjected to light control design along the Z direction, and light rays in the direction are blocked.

In order to prevent reflection imaging of light with a large viewing angle of a display panel through a front windshield, embodiments of the present disclosure provide a display panel and a display device, and the display panel and the display device provided by the embodiments of the present disclosure will be described in further detail below with reference to the accompanying drawings and detailed description. It can be appreciated that the display panel and the display device provided in the embodiments of the present disclosure may also be used in other scenarios, such as a mobile phone, a peep-proof display of a tablet computer, etc., and the principles thereof are similar, and will not be described in detail.

In a first aspect, an embodiment of the present disclosure provides a display panel, and fig. 2 is a schematic structural diagram of the display panel provided in the embodiment of the present disclosure, as shown in fig. 2, where the display panel includes: 101 a substrate, a pixel defining layer 102 on the substrate 101; the pixel defining layer 102 has a plurality of pixel openings 102a arranged in an array. Fig. 3a, 3b, 3c, and 3d are schematic top view structures of pixel openings in the display panel shown in fig. 2, and as shown in fig. 3a, 3b, 3c, and 3d, the pixel opening 102a includes: a first sub-pixel opening R, a second sub-pixel opening G, and a third sub-pixel opening B; specifically, the first subpixel opening R may be used to accommodate a red light emitting device, the second subpixel opening G may be used to accommodate a green light emitting device, and the third subpixel opening B may be used to accommodate a blue light emitting device. The areas of the first sub-pixel opening R and the second sub-pixel opening G are smaller than the area of the third sub-pixel opening B, and the first sub-pixel opening R and the second sub-pixel opening G are arranged on the same side of the third sub-pixel opening B; at least one of the first, second, and third sub-pixel openings R, G, and B has a center, a portion located at one side of the center in the column direction has a first length l1 in the row direction, and a portion located at one side of the center in the row direction has a second length l2 in the column direction, and the first length l1 is smaller than the second length l2.

Specifically, along the column direction, edges of the first, second, and third sub-pixel openings R, G, and B are at least partially bent toward the center direction.

The substrate 101 may be made of a rigid material such as glass, so that the bearing capacity of the substrate 101 to other film layers thereon may be improved. Of course, the substrate 101 may be made of flexible materials such as Polyimide (PI), so as to improve the bending resistance and stretching resistance of the display panel, and avoid the breakage of the substrate 101 caused by stress generated during bending, stretching and twisting, resulting in poor circuit breaking. In practical application, the material of the substrate 101 may be reasonably selected according to practical needs, so as to ensure that the display panel has good performance.

The substrate 101 is generally further formed with a driving circuit layer in which a pixel driving circuit is provided, and the pixel driving circuit may have a circuit structure in the related art, for example, 7T1C, 8T2C, or the like. A plurality of thin film transistors, such as driving transistors, are provided in the pixel driving circuit. The planarization layer may cover the pixel driving circuit layer to planarize the pixel driving circuit layer. The pixel defining layer 102 may cover the planarization layer. It is understood that other film layers such as a buffer layer and a barrier layer are further formed between the substrate 101 and the driving circuit layer, which will not be described in detail herein.

The pixel defining layer 102 may be made of an organic material, for example: a photoresist or the like having a plurality of pixel openings 102a arranged in an array to accommodate a light emitting layer of a light emitting device (to be described later). The plurality of pixel openings 102a are arranged in an array, and the pixel openings 102a may define a light emitting area, wherein, along the column direction, edges of the pixel openings 102a are at least partially bent toward the center direction, as shown in fig. 3a, 3b, 3c, and 3d, so that the pixel openings 102a having an originally regular rectangular shape become a diamond shape, a trapezoid shape, or other polygonal shapes.

The pixel opening 102a includes: a first sub-pixel opening R, a second sub-pixel opening G, and a third sub-pixel opening B. Due to the luminescent material in the light emitting device formed later, the luminous efficiency of the light emitting device in the first and second sub-pixel openings R and G is higher than that of the light emitting device in the third sub-pixel opening B, and the areas of the second and third sub-pixel openings G and B are generally smaller than that of the first sub-pixel opening R to ensure the uniformity of the brightness of the light emitting device in each sub-pixel opening and the uniformity of the display panel. The first sub-pixel opening R and the second sub-pixel opening G are both positioned on the same side of the third sub-pixel opening B, so that the light emitting devices formed in the sub-pixel openings can emit light rays with different colors to form multicolor display.

As shown in fig. 3a and 3b, each pixel opening 102a may have a polygonal shape with both sides in the Y direction bent toward the center, and two corners similar to the original rectangle are cut off, which may reduce the light output in the Y direction. It will be appreciated that the Y direction herein is the column direction of the display panel, and correspondingly, the X direction in the figure is the row direction of the display panel. As shown in fig. 3c, each pixel opening may have a diamond shape, two sides in the Y direction of which are bent toward the center, four corners similar to the original rectangle are cut off, and thus the light output amount in the Y direction may be reduced. As shown in fig. 3d, each pixel opening may have a trapezoid shape, two sides of which in the Y direction are bent toward the center, and two corners similar to the original rectangle are cut off, so that the light output amount in the Y direction can be reduced.

It should be noted that the shape of the pixel opening 102 may be triangular or other shapes, and the implementation principle is similar to that described above, which is not listed here.

In the display panel provided by the embodiment of the disclosure, at least one of the first sub-pixel opening R, the second sub-pixel opening G and the third sub-pixel opening B has a center, a portion located at one side of the center in the column direction has a first length l1 along the row direction, a portion located at one side of the center in the row direction has a second length l2 along the column direction, and the first length l1 is smaller than the second length l2, so that the opening size of each sub-pixel opening in the column direction can be reduced, and the light output of the display panel in the column direction can be reduced, thereby avoiding a large amount of large-viewing-angle light rays from exiting in the column direction and reflecting and imaging through the front windshield, preventing the light rays from interfering with the vision of a driver, and further improving the driving safety.

In some embodiments, as shown in fig. 2, the display panel further includes: a plurality of light emitting devices 103 arranged in one-to-one correspondence with the plurality of pixel openings 102 a; the light emitting device 103 includes: a first electrode 1031 and a second electrode 1032 disposed opposite to each other, and a light emitting layer 1033 between the first electrode 1031 and the second electrode 1032; the first electrode 1031 includes: a reflective electrode 1031a; the reflective electrode 1031a covers at least the bottom and side of the pixel opening 102a.

The first electrode 1031 may be specifically an anode of the light emitting device 103, and the second electrode 1032 may be specifically a cathode of the light emitting device 103. The light emitting layer 1033 may emit light of a corresponding color, such as red light, green light, and blue light, under the driving of an electric field between the anode and the cathode. Wherein, the anode can be made of reflective material, the cathode can be made of transparent material, and the light emitted by the light emitting layer 1033 can be reflected by the anode and transmitted by the cathode to form a top emission device.

The first electrode 1031 may include: the reflective electrode 1031a. The reflective electrode 1031a may cover the bottom and side portions of the pixel opening 102a such that the reflective layer 1031a forms the effect of a concave mirror.

When the light emitted by the light emitting layer 1033 irradiates the reflecting layer 1031a with the concave mirror effect, the reflecting layer 1031a can reflect and converge the light, and the propagation direction of the light deflects towards the center direction of the pixel opening 102a, so that the light with a large viewing angle can be prevented from being emitted from the edge of the display panel and reflected and imaged through the front windshield, the light interference is prevented from affecting the sight of a driver, and the driving safety can be improved.

In some embodiments, fig. 4 is a schematic structural diagram of another display panel provided in an embodiment of the disclosure, as shown in fig. 4, where the display panel further includes: a package layer 104 positioned on the side of the second electrode 1032 facing away from the substrate 101, and a light shielding layer 105 positioned on the side of the package layer 104 facing away from the substrate 101; the orthographic projection of the light shielding layer 105 on the substrate 101 falls on the edge of the orthographic projection of the pixel opening 102a on the substrate 101.

The encapsulation layer 104 may be formed by a multi-layer structure, for example, two inorganic insulation layers sandwich one organic encapsulation layer, where the two inorganic insulation layers can effectively cover the cathode of the light emitting device 103, so as to prevent the gas such as water and oxygen from invading the inside of the light emitting device 103, and damage the light emitting layer 1033 therein to cause failure of the light emitting layer 1033. Meanwhile, the organic packaging layer has higher flexibility and thickness, so that the overall flexibility of the packaging layer 104 can be improved, and package failure caused by cracks in the packaging process is avoided.

The light shielding layer 105 can shield the edge of the pixel opening 102a, further prevent part of the light reflected by the anode from exiting from the edge of the display panel at a large viewing angle and reflecting and imaging through the front windshield, prevent the light from interfering with the sight of the driver, and further improve the driving safety.

In some embodiments, as shown in fig. 2 and 4, the first electrode 1031 further includes: a first transparent electrode 1031b and a second transparent electrode 1031c; the first transparent electrode 1031b is located at a side of the reflective electrode 1031a near the pixel defining layer 102 and is at least partially exposed by the pixel opening 102 a; the second transparent electrode 1031c covers the reflective electrode 1031a.

The first and second transparent electrodes 1031b and 1031c may be formed of a transparent metal oxide, such as indium tin oxide, and the reflective electrode 1031a may be made of a metal having relatively high reflectivity, such as silver. The first transparent electrode 1031b and the second transparent electrode 103c can cover the reflective electrode 1031a, so as to avoid the intrusion of water and oxygen, etc., which causes corrosion of the reflective electrode 1031a, and affects the reflection and conduction effects.

On the other hand, the second transparent electrode 1031c may protect the reflective electrode 1031a from forming an etching dark spot on the reflective electrode 1031a, affecting the color reversal and the conductive effect.

In some embodiments, fig. 5 is a schematic structural diagram of still another display panel provided in an embodiment of the disclosure, where, as shown in fig. 5, the reflective electrode 1031a further covers a portion of the pixel defining layer 102; the display panel further includes: an auxiliary pixel defining layer 106 located on a side of the reflective electrode 1031a facing away from the substrate base plate 101; the auxiliary pixel defining layer 106 is black in color; the orthographic projection of the auxiliary pixel defining layer 106 on the substrate 101 falls on the edge of the orthographic projection of the pixel opening 102a on the substrate 101.

In the formation process of the reflective electrode 1031a, due to the limitation of the process, the bottom and the side of the pixel opening 102 cannot be covered exactly, and a part of the pixel defining layer 102 is generally remained on the side facing away from the substrate 101, so as to reduce the process difficulty and save the preparation cost.

The black auxiliary pixel defining layer 106 may be formed by doping black fuel with the same organic material as the pixel defining layer 102 described above. The auxiliary pixel electrode 106 can cover the portion of the reflective electrode 1031a remained on the pixel defining layer 102, and prevent the reflective electrode 1031a from reflecting light, so as to prevent light with a large viewing angle from exiting from the edge of the display panel and reflecting and imaging through the front windshield, prevent light interference from affecting the sight of the driver, and further improve driving safety.

In some embodiments, as depicted in fig. 5, the thickness of the auxiliary pixel defining layer 106 is less than the thickness of the pixel defining layer 102.

Since the auxiliary pixel defining layer 106 only plays a role of preventing reflection, its thickness is generally small to avoid increasing the thickness of the entire display panel and affecting the light and thin of the display panel.

In some embodiments, the display substrate further comprises: a passivation layer (not shown) between the auxiliary pixel defining layer 106 and the reflective anode electrode 1031a; the passivation layer wraps around the edge of the reflective anode 1031a.

The passivation layer can be silicon nitride (SiN), silicon oxide (SiO) ₂ ) Which may be formed of a single material or a multi-layer structure of a plurality of different materials. The passivation layer may prevent the water oxygen gas from invading the inside of the light emitting device 103 by the auxiliary pixel defining layer 106, causing damage to the light emitting layer 1033 therein, and thus causing failure of the light emitting layer 1033.

In some embodiments, the light shielding layer 105 includes: black matrix or antireflection film.

The light shielding layer 105 can be made of a black matrix to effectively absorb light, and can shield the edge of the pixel opening 102a, so that part of light reflected by the anode is further prevented from being emitted from the edge of the display panel to be reflected and imaged by the front windshield at a large visual angle, the light interference is prevented from affecting the sight of a driver, and the driving safety is further improved.

Under severe environment, the black matrix easily absorbs heat to affect reliability, so that the anti-reflection film can be formed by inorganic material to form the light shielding layer 105, thereby reducing heat absorption, avoiding light reflection and improving reliability of the display panel.

In a second aspect, an embodiment of the present disclosure provides a display device, where the display device includes a display panel provided in any one of the embodiments, and the display device may be specifically an electronic device with a display function, such as a mobile phone, an intelligent television, a tablet computer, a notebook computer, a vehicle navigator, etc., and its implementation principle and beneficial effects are the same as those of the display panel, and are not described herein again.

It is to be understood that the above embodiments are merely exemplary embodiments employed to illustrate the principles of the present disclosure, however, the present disclosure is not limited thereto. Various modifications and improvements may be made by those skilled in the art without departing from the spirit and substance of the disclosure, and are also considered to be within the scope of the disclosure.

Claims (11)

1. A display panel, the display panel comprising: a substrate, a pixel defining layer on the substrate; the pixel limiting layer is provided with a plurality of pixel openings which are arranged in an array manner; the pixel opening includes: a first sub-pixel opening, a second sub-pixel opening, and a third sub-pixel opening; the areas of the first sub-pixel opening and the second sub-pixel opening are smaller than the area of the third sub-pixel opening, and the first sub-pixel opening and the second sub-pixel opening are arranged on the same side of the third sub-pixel opening;

at least one of the first sub-pixel opening, the second sub-pixel opening, and the third sub-pixel opening has a center, a portion located at one side of the center in the column direction has a first length in the row direction, and a portion located at one side of the center in the row direction has a second length in the column direction, the first length being smaller than the second length.

2. The display panel of claim 1, wherein edges of the first, second, and third sub-pixel openings are at least partially folded in a center direction along a column direction.

3. The display panel of claim 1, further comprising: a plurality of light emitting devices arranged in one-to-one correspondence with the plurality of pixel openings;

the light emitting device includes: a first electrode and a second electrode disposed opposite to each other, and a light emitting layer between the first electrode and the second electrode;

the first electrode includes: a reflective electrode; the reflective electrode covers at least the bottom and the side of the pixel opening.

4. The display panel of claim 3, further comprising: the packaging layer is positioned at one side of the second electrode, which is away from the substrate, and the shading layer is positioned at one side of the packaging layer, which is away from the substrate;

the orthographic projection of the shading layer on the substrate falls on the edge of the orthographic projection of the pixel opening on the substrate.

5. The display panel of claim 4, wherein the first electrode further comprises: a first transparent electrode and a second transparent electrode;

the first transparent electrode is positioned on one side of the reflecting electrode close to the pixel limiting layer and at least partially exposed by the pixel opening;

the second transparent electrode covers the reflective electrode.

6. The display panel of claim 5, wherein the material of the reflective electrode comprises: silver; the materials of the first transparent electrode and the second transparent electrode each include: indium tin oxide.

7. A display panel according to claim 3, wherein the reflective electrode also covers part of the pixel defining layer; the display panel further includes: an auxiliary pixel defining layer positioned on a side of the reflective electrode facing away from the substrate; the color of the auxiliary pixel defining layer is black;

the orthographic projection of the auxiliary pixel defining layer on the substrate falls on an edge of the orthographic projection of the pixel opening on the substrate.

8. The display substrate of claim 7, wherein a thickness of the auxiliary pixel defining layer is less than a thickness of the pixel defining layer.

9. The display substrate of claim 7, wherein the display substrate further comprises: a passivation layer located between the auxiliary pixel defining layer and the reflective anode;

the passivation layer wraps around the edge of the reflective anode.

10. The display panel according to claim 4, wherein the light shielding layer includes: black matrix or antireflection film.

11. A display device comprising the display panel according to any one of claims 1 to 10.

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