CN117935693A - Display panel and display device - Google Patents

Abstract

The application provides a display panel and a display device, wherein the display panel comprises: a first transparent substrate; the light-emitting layer is arranged on the first transparent substrate; the light emitting layer includes a plurality of pixel regions; the transparent switching layer is arranged on one side of the light-emitting layer, which is opposite to the first transparent substrate; the transparent switching layer includes a plurality of transparent switching members configured to have a first state blocking background light and a second state allowing background light to pass through; the transparent switching pieces are covered on the pixel areas and are arranged in one-to-one correspondence with the pixel areas. The application aims to solve the technical problem that the contrast ratio of the conventional transparent display panel is low when the background light is strong.

Description

Display panel and display device

Technical Field

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

Background

Transparent display panels are increasingly popular with users. The transparent display panel is made of transparent materials, and comprises LCD, OLED, micro LED and the like. When the transparent display panel is applied to a display device, when the background light is strong, the contrast is affected by the background light, so that a viewer can feel low contrast.

Disclosure of Invention

The application mainly aims to provide a display panel and a display device, and aims to solve the technical problem that a transparent display panel in the prior art has low contrast when backlight is strong.

The application proposes a display panel, comprising:

a first transparent substrate;

the light-emitting layer is arranged on the first transparent substrate; the light emitting layer includes a plurality of pixel regions;

The transparent switching layer is arranged on one side of the light-emitting layer, which is opposite to the first transparent substrate; the transparent switching layer includes a plurality of transparent switching members having a first state blocking background light and a second state allowing background light to pass through; the transparent switching pieces are arranged in one-to-one correspondence with the pixel areas.

Optionally, the pixel area includes at least one pixel point; the transparent switching layer is an electrowetting device layer, and the transparent switching piece is an electrowetting device;

The electrowetting device layer includes:

the sealing frames are arranged around the corresponding pixel areas; and

An electrowetting material arranged in the sealing frame and sealed by the sealing frame; the electrowetting material is collapsed and staggered from the at least one pixel point when the electrowetting device is in the second state.

Optionally, the folded electrowetting material is close to an edge of the sealing frame when the electrowetting device is in the second state.

Optionally, the pixel area includes a first sub-pixel point, a second sub-pixel point and a third sub-pixel point which are arranged at intervals;

when the electrowetting device is in the second state, the folded electrowetting material is arranged corresponding to the interval space of the first sub-pixel point, the second sub-pixel point and the third sub-pixel point.

Optionally, the first sub-pixel, the second sub-pixel and the third sub-pixel define a central position;

When the electrowetting device is in the second state, the folded electrowetting material is arranged corresponding to the central position.

Optionally, the electrowetting device further comprises: the first electrode and the second electrode are connected with two opposite sides of the sealing frame; wherein the first electrode is further configured to drive the light emitting layer to emit light.

Optionally, the display panel further includes an encapsulation layer or a buffer layer, and the encapsulation layer or the buffer layer is disposed between the light emitting layer and the transparent switching layer.

Optionally, the display panel further includes:

the driving circuit assembly is used for driving the electronic device,

And the control line is connected with the electrowetting device and the driving circuit respectively and is used for inputting voltage signals to the transparent switching piece.

Optionally, the control lines are provided with a plurality of control lines, and each control line is correspondingly connected with one transparent switching piece.

The embodiment of the application also provides a display device which comprises the display panel.

In the technical scheme of the embodiment of the application, the transparent switching layer is arranged on one side of the light-emitting layer, which is away from the first transparent substrate; and a transparent switching piece is correspondingly arranged in each pixel area of the light-emitting layer in a covering manner. When the background light is strong, the transparent switching piece is in a first state of blocking the background light, so that the transparency of the display panel is reduced to shield the background light, and the displayed environment contrast is improved after the background is highlighted; when the background light is soft, the transparent switch is in a second state allowing the background light to pass through, and the transparency of the display panel is adjusted to a normal value. The transparent switching member is configured to have a first state blocking the backlight and a second state allowing the backlight to pass through, so as to adjust the transparency of the display panel to adapt to the intensity of the backlight by the operating state of the transparent switching member.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

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

fig. 2 is a schematic diagram of another structure of a display panel according to an embodiment of the application;

Fig. 3 is a schematic structural diagram of a pixel area and an electrowetting device layer of a display panel (an electrowetting material is in a folded state) according to an embodiment of the present application;

fig. 4 is a schematic structural diagram of a pixel area and an electrowetting device layer of a display panel according to an embodiment of the present application (the electrowetting material is in a flattened state);

fig. 5 is a schematic structural diagram of an electrowetting device of a display panel according to an embodiment of the present application (the electrowetting material is in a flattened state);

fig. 6 is a schematic structural diagram of an electrowetting device of a display panel according to an embodiment of the present application (the electrowetting material is in a folded state);

fig. 7 is a schematic diagram of a pixel area and an electrowetting device layer of a display panel according to an embodiment of the present application (the electrowetting material is in a folded state);

Fig. 8 is a schematic diagram of another structure of a display panel according to an embodiment of the application;

fig. 9 is a schematic diagram of another structure of a display panel according to an embodiment of the application.

List of reference numerals

Detailed Description

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

It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present application are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

In the present application, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the meaning of "and/or" as it appears throughout includes three parallel schemes, for example "A and/or B", including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present application.

A typical transparent display cannot adjust its transparency and after highlighting the background, the ambient contrast displayed will be quite low. In the prior art, the problem that the brightness of a light-emitting device can be improved to overcome the brightness of the environment is solved, but the degradation and the speed increase of the device are caused, and the service life of the product is reduced. Therefore, the embodiment of the application provides a display panel, which is provided with an electrowetting device layer so as to be capable of shielding background light when the background light is strong, thereby overcoming the technical problem under the condition that the device is not degenerated.

Specifically, referring to fig. 1 and 2, the present application proposes a display panel 10 including:

A first transparent substrate 100;

a light emitting layer 300, wherein the light emitting layer 300 is disposed on the first transparent substrate 100; the light emitting layer 300 includes a plurality of pixel regions 310;

A transparent switching layer 400, wherein the transparent switching layer 400 is disposed on a side of the light emitting layer 300 facing away from the first transparent substrate 100; the transparent switching layer 400 includes a plurality of transparent switching members 410, the transparent switching members 410 having a first state blocking background light and a second state allowing the background light to pass through; the transparent switching elements 410 are disposed in one-to-one correspondence with the pixel regions 310.

In the technical solution of the embodiment of the present application, the transparent switching layer 400 is disposed on the side of the light emitting layer 300 facing away from the first transparent substrate 100; the transparent switching element 410 is disposed in each pixel region 310 of the light emitting layer 300. When the background light is strong, the transparent switching element 410 is in the first state of blocking the background light, so as to reduce the transparency of the display panel 10, so as to block the background light, and further improve the displayed ambient contrast after highlighting the background; when the backlight is soft, the transparent switching member 410 is in the second state allowing the backlight to pass through, and the transparency of the display panel 10 is adjusted to a normal value. The transparent switching member 410 is configured to have a first state blocking the backlight and a second state allowing the backlight to pass through, so that the transparency of the display panel 10 is adjusted to accommodate the intensity of the backlight by the operating state of the transparent switching member 410.

In some implementations of the inventive examples, the transparent switching layer is an electrowetting device layer and the transparent switching element is an electrowetting device; it should be noted that the electrowetting device 410 uses the electrowetting principle to collapse and flatten the electrowetting material 412 inside. The electrowetting device 410 comprises a sealing frame 411, an electrowetting material 412 and water 413 sealed within the sealing frame 411. The sealing frame 411 comprises a frame, an upper cover plate, a lower cover plate, and a sealing space formed by enclosing the upper cover plate, the lower cover plate and the frame, wherein an electrowetting material 412 and water 413 are arranged in the sealing space. The electrowetting device 410 further comprises a second electrode 402 and a first electrode 401 for applying a voltage to the upper and lower cover plates. The electrowetting principle is a microfluidic phenomenon in which a voltage is applied between an upper and a lower substrate to change the wettability of an electrowetting material 412 on its underlying solid structure (typically a strongly hydrophobic 413 material), i.e. to change the contact angle, so that the electrowetting material 412 is deformed and displaced. When the electrowetting material 412 is collapsed, the electrowetting device 410 is in a second state allowing background light to pass through; when the electrowetting material 412 is flattened, the electrowetting device 410 is in a first state blocking background light.

The electrowetting material 412 may be an oil film. In some cases, the electrowetting material 412 may also be selected to be a polar solvent for the water 413. In the OLED display panel 10, the electrowetting material 412 tends to be a non-aqueous 413 polar solvent.

Specifically, referring to fig. 2 and 3, as an alternative implementation of the above embodiment, the pixel area 310 includes at least one pixel 311. The electrowetting device layer 400 includes: a sealing frame 411, wherein the sealing frame 411 is disposed around the corresponding pixel region 310; and an electrowetting material 412, wherein the electrowetting material 412 is disposed in the sealing frame 411 and sealed by the sealing frame 411; when the electrowetting device 410 is in the second state, the electrowetting material 412 is folded and offset from the at least one pixel point 311. By this arrangement, color shift causing transparency can be avoided.

That is, when the electrowetting material 412 is folded, its projection and the projection of the pixel 311 are offset from each other, i.e. do not fall onto the pixel 311, as seen at the viewing angles shown in fig. 2 and 3.

Referring to fig. 2 and 3, each pixel region 310 has four pixel points 311, such as red, green, blue, and white pixel points 311; the red, green, blue, and white pixel 311 and its vicinity form one pixel region 310. The sealing frame 411 of each electrowetting device 410 is disposed around its corresponding pixel area 310, i.e. the red, green, blue and white pixel points 311 of the pixel area 310 fall within the plane enclosed by the sealing frame 411. As shown in fig. 4 and 5, when the electrowetting material 412 is flattened, the electrowetting material 412 separates the pixel point 311 from the background light at the viewing angle, so as to reduce the transparency of the display panel 10, reduce the influence of the background light on the light emission of the pixel point 311, and improve the contrast ratio.

As shown in fig. 6, as an alternative to the above embodiment, the folded electrowetting material 412 is close to the edge of the sealing frame 411 when the electrowetting device 410 is in the second state. As shown in fig. 3, the edge of the sealing frame 411 of the electrowetting device 410 has a certain interval from each pixel point 311; as shown in fig. 4 or 5, the electrowetting material 412 is in a flattened state; when the flattened electrowetting material 412 needs to be folded, that is, when the electrowetting device 410 is switched from the first state to the second state, the electrowetting material 412 is folded and moves towards the edge of the sealing frame 411, and approaches to the edge of the sealing frame 411, so that the folded electrowetting material 412 is staggered with the pixel point 311; as shown in fig. 6, after the electrowetting material 412 is gathered, the gathered electrowetting material 412 is close to an edge of the sealing frame 411.

As an alternative implementation of the foregoing embodiment, as shown in fig. 7, the pixel area 310 includes a first sub-pixel 3111, a second sub-pixel 3112 and a third sub-pixel 3113 that are disposed at intervals from each other. For example, the first sub-pixel 3111, the second sub-pixel 3112 and the third sub-pixel 3113 are arranged in a triangular array, and are spaced apart from each other. When the electrowetting device 410 is in the second state, the folded electrowetting material 412 is disposed corresponding to the space between the first sub-pixel 3111, the second sub-pixel 3112 and the third sub-pixel 3113, so as to be staggered from the first sub-pixel 3111, the second sub-pixel 3112 and the third sub-pixel 3113.

As shown in fig. 3, the pixel area 310 further includes a fourth sub-pixel. The first sub-pixel 3111 (red), the second sub-pixel 3112 (green), the third sub-pixel 3113 (blue) and the fourth sub-pixel (white) are in a four-corner array. As shown in fig. 4, the electrowetting material 412 after being folded is disposed corresponding to the first sub-pixel 3111, the second sub-pixel 3112, the third sub-pixel 3113 and the fourth sub-pixel in a space, so as to be staggered from the first sub-pixel 3111, the second sub-pixel 3112, the third sub-pixel 3113 and the fourth sub-pixel.

As an alternative implementation of the foregoing embodiment, the first sub-pixel 3111, the second sub-pixel 3112 and the third sub-pixel 3113 define a central location. The gathered electrowetting material 412 is arranged corresponding to the central position when the electrowetting device 410 is in the second state. The folded electrowetting material 412 is disposed corresponding to the central position, so that when the electrowetting device 410 is switched from the second state to the first state, the electrowetting material 412 can be rapidly and uniformly flattened, so as to block the influence of the background light on each pixel point 311.

As shown in fig. 7, the first sub-pixel 3111, the second sub-pixel 3112 and the third sub-pixel 3113 may be in a regular triangle array, and the folded electrowetting material 412 corresponds to the center of the triangle. For another example, as shown in fig. 3, the first sub-pixel 3111, the second sub-pixel 3112, the third sub-pixel 3113 and the fourth pixel 311 are in a square array, and the folded electrowetting material 412 corresponds to the center of the square (the intersection of diagonal lines).

In an embodiment, the position of the collapsed electrowetting material 412 may be induced according to the electrode morphology (e.g. electrode position, electrode shape or electrode size, etc.) on the electrowetting device 410.

As an alternative to the above embodiments, the electrowetting device 410 further comprises: a first electrode 401 and a second electrode 402, wherein the first electrode 401 and the second electrode 402 are connected to two sides opposite to the sealing frame 411. The first electrode 401 is electrically connected with the lower cover plate of the sealing frame 411; the second electrode 402 is electrically connected to the upper cover plate of the sealing frame 411. The first electrode 401 and the second electrode 402 change the potential difference of the upper and lower cover plates such that the electrowetting device 410 switches between the first state and the second state by means of a change in the potential difference. In the technical solution of the embodiment of the present application, the first electrode 401 is further configured to drive the light emitting layer 300 to emit light, so that the structural complexity of the display panel 10 can be reduced. Specifically, each pixel 311 on the light emitting layer 300 is a light emitting diode; multiplexing the cathode of the light emitting diode into a first electrode 401 to be electrically connected with the lower cover plate; in an embodiment, the lower cover plate is disposed facing the light emitting layer 300. Namely: the first electrode 401 of the electrowetting device 410 may obtain a voltage by means of the cathode of its corresponding light emitting diode.

In an embodiment, as shown in fig. 8, the display panel 10 further includes a second transparent substrate 500, and the light emitting layer 300 and the electrowetting device layer 400 are disposed between the first transparent substrate 100 and the second transparent substrate 500. Sequentially stacked along the thickness direction is: a second transparent substrate 500, an electrowetting device layer 400, a light emitting layer 300, and a first transparent substrate 100. The second electrode 402 of the electrowetting device layer 400 is arranged facing the second transparent substrate 500.

In an embodiment, as shown in fig. 1, the display panel 10 may be an OLED display panel 10, in which the light emitting layer 300 is an organic light emitting diode device layer, and further includes a thin film transistor driving control layer 200. The organic light emitting diode device layer and the thin film transistor driving control layer 200 are manufactured in the prior art, and the specific structure thereof will not be described herein.

In an embodiment, the display panel 10 may also be an LCD display panel 10, a micro LED display panel 10. Which are all based on existing structures that provide an electrowetting device layer 400 to enable the transparency to be changed by the electrowetting material 412.

As an alternative to the above-described embodiment, as shown in fig. 9, the display panel 10 further includes an encapsulation layer or buffer layer 600, where the encapsulation layer or buffer layer 600 is disposed between the light emitting layer 300 and the electrowetting device layer 400. The encapsulation layer or buffer layer 600 is provided to prevent the electrowetting material 412 formulation from reacting with the diode cathode during the process or final operation of the product, thereby improving the quality of the product.

If the electrowetting material 412 is selected such that it does not react with the led device material, the encapsulation layer or the buffer layer 600 may not be provided. Namely: the encapsulation layer or buffer layer 600 is configured or not selected according to the type of electrowetting material 412.

As an alternative implementation of the above embodiment, the display panel 10 further includes: a drive circuit assembly and control lines 403. The control line 403 is connected to the electrowetting device 410 and the drive circuit, respectively, for inputting a voltage signal to the electrowetting device 410. The driving circuit assembly (SOURCE driver CIRCUIT) is connected with the T-con board of the display device to receive the transparency-adjusted signal. When transparency switching is required, the T-con board inputs a control signal to the driving circuit assembly, which inputs a voltage signal to the electrowetting device 410 via control line 403 to control the electrowetting device 410 to switch between the first state and the second state. In an embodiment, since the first electrode 401 may be multiplexed by the cathode of the light emitting layer 300, as shown in fig. 5, the control line 403 is connected to the second electrode 402, and the number of layouts of the control line 403 may be reduced.

In some embodiments, the transparency control signal is output by a null pin of the V-by-One on the T-con board.

As an alternative to the above-described embodiments, the control lines 403 have a plurality of control lines 403, each control line 403 being connected to one electrowetting device 410. So arranged, the transparency of the partial areas may be adjusted by controlling the electrowetting devices 410 individually or such that the transparency adjustment between the electrowetting devices 410 does not affect each other to improve the reliability of the display panel 10.

The embodiment of the application also provides a display device which comprises a display panel. The specific structure of the display panel refers to the above embodiments, and since the display panel adopts all the technical solutions of all the embodiments, at least the display panel has all the beneficial effects brought by the technical solutions of the embodiments, and will not be described in detail herein.

The application of the display device in the embodiment of the present application is not particularly limited, and may be a handheld device (smart phone, tablet pc, etc.), a television, a wearable device (smart bracelet, wireless earphone, smart watch, smart glasses, etc.), a vehicle-mounted device (navigator, auxiliary reversing system, automobile data recorder, vehicle-mounted refrigerator, etc.), a virtual reality device, an augmented reality device, a terminal device (TERMINAL DEVICE), etc., which are not limited herein.

The display device comprises an SoC core main board, wherein the SoC core main board outputs an image signal or a transparency control signal; the T-con board ASIC converts the transparency control signal to be output to SOURCE driver CIRCUIT, or obtains the transparency control signal based on the image signal and outputs to SOURCE driver CIRCUIT; SOURCE driver CIRCUIT control the voltage signal on the electrowetting device (layer) based on the transparency control signal to control the furling or flattening of the electrowetting material, thereby achieving an adjustment of the transparency.

The foregoing description is only of the optional embodiments of the present application, and is not intended to limit the scope of the application, and all the equivalent structural changes made by the description of the present application and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the application.

Claims (10)

1. A display panel, comprising:

a first transparent substrate;

the light-emitting layer is arranged on the first transparent substrate; the light emitting layer includes a plurality of pixel regions;

The transparent switching layer is arranged on one side of the light-emitting layer, which is opposite to the first transparent substrate; the transparent switching layer includes a plurality of transparent switching pieces having a first state blocking background light and a second state allowing the background light to pass through; the transparent switches are arranged in one-to-one correspondence with the pixel areas.

2. The display panel of claim 1, wherein the pixel region includes at least one pixel point; the transparent switching layer is an electrowetting device layer, and the transparent switching piece is an electrowetting device;

The electrowetting device layer includes:

the sealing frames are arranged around the corresponding pixel areas; and

An electrowetting material arranged in the sealing frame and sealed by the sealing frame; the electrowetting material is collapsed and staggered from the at least one pixel point when the electrowetting device is in the second state.

3. The display panel of claim 2, wherein the folded electrowetting material is proximate an edge of the sealing frame when the electrowetting device is in the second state.

4. The display panel of claim 2, wherein the pixel region includes a first sub-pixel, a second sub-pixel, and a third sub-pixel disposed at a distance from each other;

when the electrowetting device is in the second state, the folded electrowetting material is arranged corresponding to the interval space of the first sub-pixel point, the second sub-pixel point and the third sub-pixel point.

5. The display panel of claim 4, wherein the first sub-pixel, the second sub-pixel, and the third sub-pixel define a center position;

When the electrowetting device is in the second state, the folded electrowetting material is arranged corresponding to the central position.

6. The display panel of claim 2, wherein the electrowetting device further comprises: the first electrode and the second electrode are connected with two opposite sides of the sealing frame; wherein the first electrode is further configured to drive the light emitting layer to emit light.

7. The display panel of claim 1, further comprising an encapsulation layer or a buffer layer disposed between the light emitting layer and the transparent switching layer.

8. The display panel of claim 1, wherein the display panel further comprises:

the driving circuit assembly is used for driving the electronic device,

And the control line is connected with the transparent switching piece and the driving circuit component respectively and is used for inputting voltage signals to the electrowetting device.

9. The display panel of claim 8, wherein the control lines have a plurality of control lines, each of the control lines being correspondingly connected to one of the transparent switching members.

10. A display device comprising the display panel according to any one of claims 1 to 9.