CN110808273A - Display panel and display device - Google Patents

Abstract

The application discloses a display panel and a display device, wherein the display panel comprises a pixel unit and a conversion device, the pixel unit comprises a plurality of sub-pixels, the sub-pixels are arranged in a pixel area, and the conversion device is arranged in a non-pixel area; the switching device comprises an upper electrode, a lower electrode and a microcapsule containing electrophoretic particles, wherein the microcapsule is arranged between the upper electrode and the lower electrode and can be switched between a first state and a second state; when the microcapsule is in a first state, the electrophoretic particles in the microcapsule are arranged along the transverse direction and distributed at one end of the microcapsule close to the upper electrode or the lower electrode; when the microcapsule is in the second state, the electrophoretic particles in the microcapsule are vertically arranged and are arranged on the peripheral side of the microcapsule. Through the arrangement, the conversion device can be converted into a state of blocking external light to interfere the light emitting display of the sub-pixels, the crosstalk phenomenon caused by the light emitting of the sub-pixels can be prevented, and the display effect of the display panel is improved.

Description

Display panel and display device

Technical Field

The application relates to the field of intelligent display, in particular to a display panel and display equipment.

Background

A display panel of a display device, in particular an OLED display panel, is operated to emit light by a plurality of sub-pixels (each composed of an organic light emitting material emitting red, green, and blue light). However, since the distance between adjacent sub-pixels is small, when a plurality of sub-pixels emit light, crosstalk phenomenon is easily generated in the emitted light, so that the display effect of the display panel is greatly affected. Meanwhile, after external light enters the display device, the external light is easily reflected by metal parts in the display panel and is led into the sight of a user again, and therefore the display effect of the display panel is affected.

Disclosure of Invention

The application provides a display panel and display device, which can improve the display effect of the display panel.

According to a first aspect of the present application, there is provided a display panel including a pixel unit including a plurality of sub-pixels, and a conversion device disposed in a non-pixel region, the display panel including a pixel region in which the sub-pixels are disposed and the non-pixel region;

the switching device comprises an upper electrode, a lower electrode and a microcapsule containing electrophoretic particles, the microcapsule being arranged between the upper electrode and the lower electrode, the microcapsule being switchable between a first state and a second state;

wherein, when the microcapsule is in the first state, the electrophoretic particles in the microcapsule are arranged along the transverse direction and distributed at one end of the microcapsule close to the upper electrode or the lower electrode to form a black matrix;

when the microcapsule is in the second state, the electrophoretic particles in the microcapsule are vertically arranged and arranged on the peripheral side of the microcapsule, and a through light path is arranged in the microcapsule along the vertical direction, and the electrophoretic particles are far away from the light path.

Further, the upper electrode is a transparent electrode.

Further, the lower electrode is made of a reflective material, and the reflectivity of the reflective material is higher than a first threshold value.

Further, when the upper electrode and the lower electrode apply a low-frequency voltage to the microcapsule, the microcapsule is in the first state, and the electrophoretic particles are distributed at one end of the microcapsule close to the upper electrode or close to the lower electrode;

when the upper electrode and the lower electrode apply high-frequency voltage to the microcapsule, the microcapsule is in a second state, and the electrophoretic particles are distributed on the peripheral side of the microcapsule.

Further, the conversion device further includes an isolation layer, at least a portion of which is disposed between the upper electrode and the lower electrode and encloses an accommodation space configured to accommodate the microcapsule with the upper electrode and the lower electrode.

Further, the conversion device is arranged in a staggered manner with the sub-pixels, and the conversion device is positioned above the sub-pixels;

the display panel also includes a pixel defining layer, the sub-pixels being formed on the pixel defining layer, the conversion device surrounding the sub-pixels in a projection of the pixel defining layer.

Further, the conversion device is disposed on the same layer as the sub-pixels, the display panel further includes a pixel defining layer, the sub-pixels are formed on the pixel defining layer, at least a portion of the conversion device is disposed on the pixel defining layer, and the conversion device surrounds the sub-pixels.

Further, the upper electrode, the lower electrode, and the microcapsule containing the electrophoretic particles of the switching device are disposed in the pixel defining layer, and the switching device surrounds the sub-pixels.

Further, the display panel further comprises a cathode layer, a pixel defining layer and an anode layer along the vertical direction;

the microcapsules containing the electrophoretic particles of the switching device are disposed in the pixel defining layer and surround the subpixels; the cathode layer serves as the upper electrode of the conversion device, and/or the anode layer serves as the lower electrode of the conversion device.

According to a second aspect of the present application, there is provided a display device comprising the above display panel.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

in the above arrangement, the display panel is provided with a display area and a non-display area, wherein the display area further includes a pixel area and a non-pixel area, the area provided with the sub-pixels forms the pixel area, the area between adjacent sub-pixels forms the non-pixel area, the conversion device is disposed in the non-pixel area and can be switched between a first state and a second state, that is, the electrophoretic particles in the conversion device are gathered at one end of the microcapsule close to the upper electrode or the lower electrode, so that the electrophoretic particles can absorb light entering the display panel from the outside, the light is prevented from re-entering the user's sight line through the reflection of the metal component, and the display effect of the display panel is improved; meanwhile, the arrangement of the electrophoretic particles prevents light emitted by the display panel and located in the non-pixel region from leaving the display panel through the non-pixel region and entering the sight of a user, in other words, the microcapsule containing the electrophoretic particles is arranged between adjacent sub-pixels, so that the crosstalk phenomenon caused by the light emission of the sub-pixels can be prevented, and the display effect of the display panel is improved.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

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

Fig. 2 is a schematic structural diagram of a display panel according to another embodiment of the present application.

Fig. 3 is a schematic structural diagram of a conversion device according to an embodiment of the present application.

Fig. 4 is a schematic structural diagram of another conversion apparatus according to an embodiment of the present application.

Fig. 5 is a schematic structural diagram of another conversion apparatus according to an embodiment of the present application.

Fig. 6 is a schematic structural diagram of a display panel according to yet another embodiment of the present application.

Fig. 7 is a schematic structural diagram of another display panel according to another embodiment of the present application.

Description of the reference numerals

Display panel 10

Pixel region 13

Non-pixel region 14

Substrate layer 100

Gate insulation layer 200

Gate layer 300

Source layer 400

Drain layer 500

Semiconductor layer 510

Passivation layer 600

First passivation layer 610

Second passivation layer 620

Pixel module 700

Anode layer 710

Pixel defining layer 720

First through slot 721

Second through groove 722

Cathode layer 730

Sub-pixel 701

Conversion device 800

First state 801

Second state 802

Light walkway 803

Upper electrode 810

Lower electrode 820

Electrophoretic particles 830

Microcapsules 840

Isolation layer 850

Protective panel 900

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

The embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments may be combined with each other without conflict.

The application provides a display panel, which can be applied to display equipment, wherein the display equipment can be display equipment on a mobile phone, a computer, a watch, an electronic book and the like, and can be flexible display equipment and also can be equipment which cannot be deformed. In this embodiment, the display panel is an OLED display panel, but in other embodiments, the display panel may also be an LCD display panel or other display panels.

As shown in fig. 1 and 2, the display panel 10 includes a substrate layer 100, a gate insulating layer 200, a gate electrode layer 300, a source electrode layer 400, a drain electrode layer 500, a semiconductor layer 510, a passivation layer 600, a pixel module 700, a conversion device 800, and a protective panel 900. The pixel module 700 includes an anode layer 710, a pixel defining layer 720, and a cathode layer 730, wherein the anode layer 710 extends down to the drain layer 500. The pixel defining layer 720 is provided therein with first through trenches 721 for filling organic light emitting materials, and one pixel module 700 includes at least three first through trenches 721 for filling organic light emitting materials for emitting red light, organic light emitting materials for emitting green light, and organic light emitting materials for emitting blue light, respectively, and forms at least three sub-pixels 701. Of course, the number of the first through slots 721 may also be more than three, for example, the organic light emitting material emitting blue light has a large loss and a short lifetime, and a plurality of first through slots 721 filled with the organic light emitting material emitting blue light may be provided to ensure normal display of the display panel 10.

The display panel 10 includes a display region and a non-display region, and the conversion device 800 and the pixel module 700 are disposed in the display region. The display area further includes a plurality of pixel regions 13, the sub-pixels 701 are disposed in the pixel regions 13, the regions between adjacent sub-pixels 701 form non-pixel regions 14, and the conversion device 800 is disposed in the non-pixel regions 14.

As shown in fig. 3-5, the switching device 800 includes an upper electrode 810, a lower electrode 820, and microcapsules 840 containing electrophoretic particles 830. The microcapsules 840 are disposed between the upper electrode 810 and the lower electrode 820, the microcapsules 840 being switchable between a first state 801 and a second state 802.

As shown in fig. 3 and 4, when the microcapsule 840 is in the first state 801, the electrophoretic particles 830 in the microcapsule 840 are arranged in the transverse direction and distributed at one end of the microcapsule 840 near the upper electrode 810 or near the lower electrode 820 to form a black matrix. In the above configuration, when the electrophoretic particles 830 are gathered at one end of the microcapsule 840 close to the upper electrode 810 or the lower electrode 820, the electrophoretic particles 830 may absorb light entering the display panel 10 from the outside, so as to prevent the light from reflecting off a metal component located below the microcapsule 840 and re-entering the user's sight, thereby improving the display effect of the display panel 10. At this time, the path of the external light is shown by the arrow on the dotted line in the figure. In the conventional design, the function of preventing external light reflection is usually achieved by adding a circular polarizer to the display panel 10, but the addition of the circular polarizer complicates the structure of the display panel 10. In this embodiment, the conversion device 800 is provided to achieve this function, so that a circular polarizer does not need to be installed in the display panel 10, and the structure is simplified. Meanwhile, the electrophoretic particles 830 are arranged such that light emitted by the display panel 10 and located in the non-pixel region 14 cannot pass through the switching device 800 in the non-pixel region 14 and enter the user's sight line away from the display panel 10, in other words, the microcapsules 840 containing the electrophoretic particles 830 are disposed between adjacent sub-pixels 701, which can prevent the crosstalk phenomenon caused by the light emission of the sub-pixels 701 and improve the display effect of the display panel 10.

As shown in fig. 5, when the microcapsule 840 is in the second state 802, the electrophoretic particles 830 in the microcapsule 840 are arranged in a vertical direction and are disposed at a peripheral side of the microcapsule 840. In the vertical direction, a light path 803 is provided in the microcapsule 840, and the electrophoretic particles 830 are far from the light path 803. Therefore, external light can enter the inside of the microcapsule 840 through the light path 803 and then be reflected by the metal component located at the lower part of the microcapsule 840, so that the display panel 10 can have a mirror display function. At this time, the path of the external light is shown by the arrow on the dotted line in the figure.

In the present embodiment, the upper electrode 810 is a transparent electrode. With the above arrangement, when the micro-capsule 840 is in the second state 802, external light can better enter the micro-capsule 840 and be reflected by the metal component below the micro-capsule 840.

Further, the material of the bottom electrode 820 is a reflective metal material, and the reflectivity of the reflective metal material is higher than the first threshold. In this embodiment, the first threshold is greater than or equal to 80%, so that the lower electrode 820 can perform total reflection on the external light entering through the microcapsule 840, and the display panel 10 can implement a mirror display function.

In actual use, when the user only needs to use the display device to perform mirror display, the display function of the display panel 10 may be turned off, i.e., the sub-pixels 701 do not emit light, and the micro-capsule 840 is in the second state 802. At this time, external light enters the display panel 10, enters the microcapsule 840 through the light path 803 in the microcapsule 840, and is reflected by the lower electrode 820 located below the microcapsule 840. The external light is reflected by the lower electrode 820 to re-enter the user's sight line, so that the display panel 10 has a mirror display function (see fig. 5).

When the user only needs to make a smart display with the display device, the sub-pixel 701 emits light and the micro capsule 840 is in the first state 801. At this time, the electrophoretic particles 830 are gathered at one side of the microcapsule 840 close to the upper electrode 810 or the lower electrode 820, and the light path 803 is blocked, so as to absorb light entering the display device from the outside, and prevent the light from reflecting and re-entering the user's sight line, thereby enabling the user to capture only the light emitted by the sub-pixel 701, increasing the light emitting efficiency of the display panel 10, and improving the visual experience of the user (see fig. 6, wherein an arrow in a dotted line represents a light path of the outside light, and an arrow in a dot-dash line represents a light path of the light emitted by the sub-pixel).

When the user desires the display panel 10 to simultaneously perform the smart display and the mirror display, the sub-pixels 701 emit light and the micro-capsules 840 are placed in the second state 802. At this time, the electrophoretic particles 830 are gathered at the peripheral side of the microcapsule 840, the light path 803 is formed in the microcapsule 840, and external light enters the display panel 10, enters the microcapsule 840 through the light path 803 in the microcapsule 840, and is reflected by the lower electrode 820 located below the microcapsule 840 to re-enter the user's sight line. At this time, the user can see both the scene reflected by the display panel 10 and the smart display image formed by the light emitted by the sub-pixel 701, so as to enrich the user experience and meet more requirements of the user (see fig. 7, wherein an arrow in a dotted line represents a light path of the external light, and an arrow in a dot-dash line represents a light path of the light emitted by the sub-pixel).

In this embodiment, the electric field around the microcapsules 840 may be changed by applying different voltages to the upper electrode 810 and the lower electrode 820, thereby changing the positions of the electrophoretic particles 830 in the microcapsules 840 to change the state of the microcapsules 840. When the microcapsule 840 is in the first state 801 when the upper electrode 810 and the lower electrode 820 apply a low frequency voltage to the microcapsule 840, the electrophoretic particles 830 are distributed at one end of the microcapsule 840 near the upper electrode 810 or near the lower electrode 820 to form a black matrix. Meanwhile, the direction of the electric field can be changed by changing the positive and negative relationship between the upper electrode 810 and the lower electrode 820, so as to change the configuration of the electrophoretic particles 830 collected at the end of the microcapsule 840 near the upper electrode 810 or near the lower electrode 820. When the microcapsule 840 is applied with a high frequency voltage by the upper electrode 810 and the lower electrode 820, the microcapsule 840 is in the second state 802, and the electrophoretic particles 830 are distributed around the microcapsule 840 to form an unobstructed light path 803.

Further, as shown in fig. 1 and 2, the conversion device 800 further includes an isolation layer 850, at least a portion of the isolation layer 850 being disposed between the upper electrode 810 and the lower electrode 820 and enclosing, with the upper electrode 810 and the lower electrode 820, a receiving space configured to receive the microcapsule 840. With the above arrangement, the microcapsules 840 can be confined in the accommodating space, and other substances can be prevented from entering the accommodating space and affecting the normal display of the display panel 10.

As shown in fig. 1 and 2, the conversion device 800 may be disposed in the same layer as the sub-pixel 701, i.e., the conversion device 800 and the sub-pixel 701 are both formed on the pixel defining layer 720, at least a portion of the conversion device 800 is disposed on the pixel defining layer 720, and the conversion device 800 surrounds the sub-pixel 701. The pixel defining layer 720 may further have a second through groove 722 for filling the conversion device 800, the second through groove 722 surrounds the first through groove 721, the conversion device 800 is disposed in the second through groove 722, so as to realize the enclosure of the sub-pixel 701 by the conversion device 800, and when the microcapsule 840 is in the first state 801, the conversion device 800 can form a black matrix to prevent crosstalk caused by light emitted by the adjacent sub-pixel 701.

As shown in fig. 1, in one embodiment, the upper electrode 810, the lower electrode 820, and the microcapsule 840 containing the electrophoretic particles 830 of the switching device 800 are disposed in the pixel defining layer 720, and the switching device 800 surrounds the sub-pixel 701. The lower electrode 820 of the conversion device 800 may be separately disposed, or may be formed simultaneously with the cathode layer 730 of the sub-pixel 701, so as to simplify the manufacturing process and simplify the structure of the display panel 10.

As shown in fig. 2, in another embodiment, the upper electrode 810 and the cathode layer 730 of the conversion device 800 are disposed at the same layer, the lower electrode 820 and the cathode layer 730 are disposed at the same layer, in other words, the cathode layer 730 serves as the upper electrode 810 of the conversion device 800, and the anode layer 710 serves as the lower electrode 820 of the conversion device 800. Through the arrangement, the manufacturing process is simplified, and the structure of the display panel 10 is simplified.

It should be noted that, in the above embodiments, the number of passivation layers 600 is two, i.e., the first passivation layer 610 and the second passivation layer 620. Of course, the number of the passivation layers 600 may be determined according to actual requirements.

In other embodiments, the conversion means may also be arranged in staggered layers with the sub-pixels.

As shown in fig. 6 and 7, the conversion device 800 is arranged with the sub-pixel staggered layer, and the conversion device 800 is located above the sub-pixel, i.e., the conversion device 800 is formed above the pixel defining layer 720. The sub-pixels are formed in a pixel defining layer 720, and the conversion device 800 surrounds the sub-pixels in a projection of the pixel defining layer 720. In the display panel 10 shown in fig. 6, the switching device 800 is in the first state 801; in the display panel 10 shown in fig. 7, the switching device 800 is in the second state 802. With the above arrangement, when the micro capsule 840 is in the first state 801, a black matrix can be formed, and the phenomenon of crosstalk caused by light emitted from adjacent sub-pixels can still be prevented.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims (10)

1. A display panel is characterized by comprising a pixel unit and a conversion device, wherein the pixel unit comprises a plurality of sub-pixels, the display panel comprises a pixel area and a non-pixel area, the sub-pixels are arranged in the pixel area, and the conversion device is arranged in the non-pixel area;

the switching device comprises an upper electrode, a lower electrode and a microcapsule containing electrophoretic particles, the microcapsule being arranged between the upper electrode and the lower electrode, the microcapsule being switchable between a first state and a second state;

wherein, when the microcapsule is in the first state, the electrophoretic particles in the microcapsule are arranged along the transverse direction and distributed at one end of the microcapsule close to the upper electrode or the lower electrode to form a black matrix;

when the microcapsule is in the second state, the electrophoretic particles in the microcapsule are vertically arranged and arranged on the peripheral side of the microcapsule, and a through light path is arranged in the microcapsule along the vertical direction, and the electrophoretic particles are far away from the light path.

2. The display panel according to claim 1, wherein the upper electrode is a transparent electrode.

3. The display panel of claim 1, wherein the material of the lower electrode is a light reflecting material, and a reflectivity of the light reflecting material is higher than a first threshold.

4. The display panel according to claim 1, wherein the microcapsule is in the first state when the upper electrode and the lower electrode apply a low frequency voltage to the microcapsule, and the electrophoretic particles are distributed at one end of the microcapsule near the upper electrode or near the lower electrode;

when the upper electrode and the lower electrode apply high-frequency voltage to the microcapsule, the microcapsule is in a second state, and the electrophoretic particles are distributed on the peripheral side of the microcapsule.

5. The display panel according to claim 1, wherein the conversion device further comprises a spacer layer, at least a portion of which is disposed between the upper electrode and the lower electrode and encloses a containing space configured to contain the microcapsule with the upper electrode and the lower electrode.

6. The display panel of claim 1, wherein the conversion means is arranged in staggered layers with the sub-pixels, and wherein the conversion means is located above the sub-pixels;

the display panel also includes a pixel defining layer, the sub-pixels being formed on the pixel defining layer, the conversion device surrounding the sub-pixels in a projection of the pixel defining layer.

7. The display panel of claim 1, wherein the conversion device is disposed on a same layer as the sub-pixels, the display panel further comprising a pixel defining layer on which the sub-pixels are formed, at least a portion of the conversion device being disposed on the pixel defining layer, and the conversion device surrounding the sub-pixels.

8. The display panel according to claim 7, wherein the upper electrode, the lower electrode, and the microcapsule containing the electrophoretic particles of the switching device are disposed in the pixel defining layer, and wherein the switching device surrounds the sub-pixels.

9. The display panel according to claim 7, wherein the display panel further comprises a cathode layer, a pixel defining layer, an anode layer;

the microcapsules containing the electrophoretic particles of the switching device are disposed in the pixel defining layer and surround the subpixels; the cathode layer serves as the upper electrode of the conversion device, and/or the anode layer serves as the lower electrode of the conversion device.

10. A display device characterized in that it comprises a display panel as claimed in any one of claims 1 to 9.

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