CN109725412B - Display panel, display device and display method - Google Patents
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- CN109725412B CN109725412B CN201910002759.6A CN201910002759A CN109725412B CN 109725412 B CN109725412 B CN 109725412B CN 201910002759 A CN201910002759 A CN 201910002759A CN 109725412 B CN109725412 B CN 109725412B
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Abstract
The application provides a display panel, a display device and a display method, wherein the display panel comprises a display substrate and an electrowetting substrate which are oppositely arranged; according to the technical scheme, the third electrode and the fourth electrode can be controlled to be conducted while the first fluid is controlled to flow to form the light transmission area, so that the peripheral driving circuit is connected with the second electrode of the display substrate to drive the display substrate to emit light, the light emitting stage of the display panel and the light transmission stage of the electrowetting panel can be synchronized without adding a logic control circuit, and the design cost is saved; and the transmission display mode can improve the contrast of the display panel, and is particularly suitable for outdoor display products with high brightness contrast.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display panel, a display device, and a display method.
Background
The principle of the electrowetting technology is that the wettability of the liquid drop and the surface of a solid is changed by adjusting the voltage applied between the liquid drop and the contact solid, so that the three-phase contact angle of the liquid drop and the solid is changed, the liquid drop is deformed, and the liquid drop is driven to move. The electrowetting display technology is more and more favored by people due to the characteristics of bistable display, good reflectivity, low power consumption, wide temperature range and sufficiently fast response speed. The electrowetting display technology is still in the beginning stage at present, but the excellent performance and the development potential exhibited by the electrowetting display technology indicate that the electrowetting display necessarily occupies a place in the future display technology field and becomes an important display method.
However, the conventional electrowetting display device displays contents by reflecting ambient light, which is easily affected by ambient brightness, resulting in a low display contrast.
Disclosure of Invention
The invention provides a display panel, a display device and a display method, which aim to improve the display contrast.
In order to solve the above problems, the present invention discloses a display panel, comprising a display substrate and an electrowetting substrate which are oppositely arranged;
the display substrate comprises a peripheral driving circuit, a first electrode, an organic light-emitting layer and a second electrode, wherein the first electrode, the organic light-emitting layer and the second electrode are arranged on a substrate in a stacked mode;
the electrowetting substrate comprises a first substrate and a second substrate which are oppositely arranged, a pixel defining layer, and a first fluid and a second fluid which are incompatible with each other and are filled between the first substrate and the second substrate, wherein the first fluid is light-proof and insulating, and the second fluid is light-transmitting and conductive; the first substrate is disposed proximate the second electrode and the second fluid is filled proximate the second substrate;
the first substrate comprises a substrate arranged close to the second electrode, a first dielectric layer arranged on one side of the substrate, which is far away from the second electrode, and a third electrode and a fourth electrode which are arranged on one side of the first dielectric layer, which is far away from the substrate, and are separated from each other, wherein the third electrode is connected with the peripheral driving circuit, and the fourth electrode is connected with the second electrode;
the first fluid can flow under the action of an external electric field so as to control the connection or disconnection between the third electrode and the fourth electrode.
Optionally, the substrate includes a first insulating layer disposed close to the second electrode and a fifth electrode disposed on a side of the first insulating layer facing away from the second electrode, and the second substrate includes a second insulating layer disposed close to the first substrate and a sixth electrode disposed on a side of the second insulating layer facing away from the first substrate; and the fifth electrode and the sixth electrode are used for forming the external electric field and controlling the flow of the first fluid.
Optionally, the substrate further includes a thin film transistor disposed on a side of the first insulating layer facing away from the second electrode, the thin film transistor includes a gate, a first pole and a second pole, the second pole is connected to the fifth electrode, and the thin film transistor is configured to write a voltage of the first pole into the fifth electrode according to a voltage of the gate.
Optionally, the first dielectric layer is a hydrophobic dielectric, and the first substrate further includes a hydrophilic dielectric layer disposed on a side of the third electrode and the fourth electrode away from the substrate.
Optionally, the pixel defining layer is a hydrophobic medium.
Optionally, the first fluid is an ink and the second fluid is a transparent salt solution.
In order to solve the above problem, the present invention further discloses a display device, which includes the display panel according to any embodiment.
In order to solve the above problem, the present invention further discloses a display method for the display panel according to any embodiment, the display method comprising:
adjusting the external electric field to control the flow of the first fluid, comprising:
in the light transmission stage, controlling the first fluid to contract, so that the second fluid is filled between the third electrode and the fourth electrode, and the third electrode and the fourth electrode are conducted;
and in the light-tight stage, controlling the first fluid to be filled between the third electrode and the fourth electrode so as to disconnect the third electrode and the fourth electrode.
Optionally, when the substrate includes a fifth electrode and the second substrate includes a sixth electrode, the step of adjusting the external electric field and controlling the flow of the first fluid includes:
inputting a first voltage to the fifth electrode and inputting a second voltage to the sixth electrode;
and adjusting the magnitude of the first voltage and/or the second voltage to control the flow of the first fluid.
Optionally, when the fifth electrode is connected to the thin film transistor, the step of inputting the first voltage to the fifth electrode includes:
inputting a gate voltage to a gate of the thin film transistor, inputting the first voltage to a first electrode of the thin film transistor, and writing the first voltage into the fifth electrode according to the gate voltage.
Optionally, an absolute value of a difference between the first voltage and the second voltage is greater than or equal to 15V and less than or equal to 30V.
Optionally, when the first dielectric layer is a hydrophobic dielectric and the first substrate further includes a hydrophilic dielectric layer disposed on a side of the third electrode and the fourth electrode facing away from the substrate,
in the light transmission stage, the first voltage is greater than the second voltage;
in the opaque stage, the first voltage is smaller than the second voltage.
Optionally, the display method further includes:
inputting a data voltage to the third electrode through the peripheral driving circuit.
Optionally, before the step of adjusting the external electric field and controlling the flow of the first fluid, the display method further includes:
the same voltage is input to the first electrode and the second electrode.
Compared with the prior art, the invention has the following advantages:
the application provides a display panel, a display device and a display method, wherein the display panel comprises a display substrate and an electrowetting substrate which are oppositely arranged; the display substrate comprises a peripheral driving circuit, a first electrode, an organic light-emitting layer and a second electrode, wherein the first electrode, the organic light-emitting layer and the second electrode are arranged on a substrate in a stacked mode; the electrowetting substrate comprises a first substrate and a second substrate which are oppositely arranged, a pixel defining layer, and a first fluid and a second fluid which are incompatible with each other and are filled between the first substrate and the second substrate, wherein the first fluid is light-proof and insulating, and the second fluid is light-transmitting and conductive; the first substrate is disposed proximate the second electrode and the second fluid is filled proximate the second substrate; the first substrate comprises a substrate arranged close to the second electrode, a first dielectric layer arranged on one side of the substrate, which is far away from the second electrode, and a third electrode and a fourth electrode which are arranged on one side of the first dielectric layer, which is far away from the substrate, and are separated from each other, wherein the third electrode is connected with the peripheral driving circuit, and the fourth electrode is connected with the second electrode; the first fluid can flow under the action of an external electric field so as to control the connection or disconnection between the third electrode and the fourth electrode. According to the technical scheme, the third electrode and the fourth electrode can be controlled to be conducted while the first fluid is controlled to flow to form the light transmission area, so that the peripheral driving circuit is connected with the second electrode of the display substrate to drive the display substrate to emit light, the light emitting stage of the display panel and the light transmission stage of the electrowetting panel can be synchronized without adding a logic control circuit, and the design cost is saved; and the transmission display mode can improve the contrast of the display panel, and is particularly suitable for outdoor display products with high brightness contrast.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view illustrating a display panel in an opaque state according to an embodiment of the present disclosure;
fig. 2 is a schematic cross-sectional view illustrating a display panel in a light-transmitting state according to an embodiment of the present disclosure;
fig. 3 shows an equivalent circuit structure schematic diagram of a display panel provided in an embodiment of the present application.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
An embodiment of the present application provides a display panel, which may include a display substrate 10 and an electrowetting substrate 11 disposed opposite to each other, referring to fig. 1 and 2.
Specifically, the display substrate 10 includes a peripheral driving circuit, and a first electrode 102, an organic light emitting layer 103, and a second electrode 104 which are stacked on a substrate 101, the first electrode 102 being disposed adjacent to the substrate 101.
The organic light emitting layer 103 may include organic film layers such as a hole injection layer, a hole transport layer, a light emitting layer, an electron transport layer, and an electron injection layer.
The first electrode 102 may be, for example, a metal cathode, and the second electrode 104 may be, for example, an ITO anode.
The electrowetting substrate 11 comprises a first substrate 111 and a second substrate 112 which are oppositely arranged, a pixel defining layer 115, and a first fluid 113 and a second fluid 114 which are incompatible with each other and are filled between the first substrate 111 and the second substrate 112, wherein the first fluid 113 is light-proof and insulating, and the second fluid 114 is light-permeable and conductive; the first substrate 111 is arranged adjacent to the second electrode 104 and the second fluid 114 is filled adjacent to the second substrate 112.
The first substrate 111 includes a substrate 1111 disposed close to the second electrode 104, a first dielectric layer 1112 disposed on a side of the substrate 1111 facing away from the second electrode 104, and a third electrode 1113 and a fourth electrode 1114 disposed separately on a side of the first dielectric layer 1112 facing away from the substrate 1111, wherein the third electrode 1113 is connected to a peripheral driving circuit of the display substrate 10, and the fourth electrode 1114 is connected to the second electrode 104; the first fluid 113 can flow under the action of an external electric field to control the connection or disconnection between the third electrode 1113 and the fourth electrode 1114.
The first fluid 113 may be, for example, a light-tight and insulating liquid such as ink, and the color of the first fluid 113 may be adjusted according to the light emitting color of the display panel; the second fluid 112 may be, for example, NaNO3Solutions and the like.
The first dielectric layer 1112 may be a hydrophobic or hydrophilic medium.
A pixel defining layer 115 may be disposed between the first substrate 111 and the second substrate 112 for defining a plurality of pixel cells of the electrowetting substrate 11. Here, each pixel unit of the electrowetting substrate 11 may correspond to each light emitting unit of the display substrate 10 one to one. The pixel defining layer 115 may be, for example, a hydrophobic medium.
Under the action of an external electric field, the adsorption force between the first fluid 113 and the first medium layer 1112 and the adsorption force between the second fluid 114 and the first medium layer 1112 are changed, so that the first fluid 113 and the second fluid 114 flow. For example, referring to fig. 2, when the external electric field is adjusted to control the absorption force between the first fluid 113 and the first dielectric layer 1112 to be reduced and smaller than the absorption force between the second fluid 114 and the first dielectric layer 1112, the first fluid 113 swells, the contact area between the first fluid 113 and the first dielectric layer 1112 becomes smaller, the second fluid 114 is filled between the third electrode 1113 and the fourth electrode 1114 and presses the first fluid 113 onto the third electrode 1113 and the fourth electrode 1114 on both sides, and the third electrode 1113 and the fourth electrode 1114 are conducted because the second fluid 114 is conductive, and at this time, the electrowetting substrate 11 is in a light-transmitting state; in addition, since the third electrode 1113 is connected to the peripheral driving circuit of the display substrate 10, the fourth electrode 1114 is connected to the second electrode 104, and the peripheral driving circuit of the display substrate 10 is electrically connected to the second electrode 104 of the display substrate 10 while the third electrode 1113 and the fourth electrode 1114 are electrically connected, the display substrate 10 can be driven to emit light.
Referring to fig. 1, when the external electric field is adjusted to control the absorption force between the first fluid 113 and the first dielectric layer 1112 to be increased and greater than the absorption force between the second fluid 114 and the first dielectric layer 1112, the first fluid 113 is filled between the third electrode 1113 and the fourth electrode 1114, and the third electrode 1113 and the fourth electrode 1114 are disconnected due to the insulation of the first fluid 113, at this time, the electrowetting substrate 11 is in a non-light-transmitting state, and the peripheral driving circuit of the display substrate 10 and the second electrode 104 of the display substrate 10 are also disconnected, so that the display substrate 10 does not emit light.
The display panel provided by the embodiment can control the conduction between the third electrode and the fourth electrode while controlling the flow of the first fluid to form the light-transmitting area, so that the peripheral driving circuit is connected with the second electrode of the display substrate to drive the display substrate to emit light, the light-emitting stage of the display panel can be synchronous with the light-transmitting stage of the electrowetting panel without adding a logic control circuit, and the design cost is saved; and the transmission display mode can improve the contrast of the display panel, and is particularly suitable for outdoor display products with high brightness contrast.
In one implementation of forming an external electric field, referring to fig. 1 and 2, the substrate 1111 includes a first insulating layer 1116 disposed near the second electrode 104 and a fifth electrode 1117 disposed on a side of the first insulating layer 1116 away from the second electrode 104, and the second substrate 112 includes a second insulating layer 1119 disposed near the first substrate 111 and a sixth electrode 1118 disposed on a side of the second insulating layer 1119 away from the first substrate 111; the fifth electrode 1117 and the sixth electrode 1118 are configured to form an external electric field therebetween to control the flow of the first fluid 113.
Specifically, the material of the fifth electrode 1117 and the sixth electrode 1118 may be, for example, transparent ITO. In practical applications, the first voltage V1 may be input to the fifth electrode 1117, the second voltage V2 may be input to the sixth electrode 1118, and the first voltage V1 and/or the second voltage V2 may be adjusted to adjust the external electric field, so as to control the flow of the first fluid 113. The first voltage V1 and the second voltage V2 may be determined according to actual conditions, such as the material of the first dielectric layer 1112.
In order to input the first voltage V1 to the fifth electrode 1117, the fifth electrode 1117 in the electrowetting substrate 11 may be connected to an addressing circuit, for example, an active addressing circuit (or passive addressing), referring to fig. 3, the substrate 1111 may further include a thin film transistor M1 disposed on a side of the first insulating layer 1116 facing away from the second electrode 104, the thin film transistor M1 includes a gate, a first pole and a second pole, the second pole is connected to the fifth electrode 1117, and the thin film transistor M1 is configured to write the voltage of the first pole into the fifth electrode 1117 according to the voltage of the gate. In practical applications, the first voltage V1 can be input to the first pole, so that the first voltage V1 can be input to the fifth pole 1117. When the pixel unit is selected, the gate voltage is inputted to control the thin film transistor M1 to be turned on, and the first voltage V1 is inputted to the fifth electrode 1117 of the electrowetting substrate 11.
Referring to fig. 3, the electrowetting substrate 11 may be equivalent to a liquid field effect transistor M2, wherein the fifth electrode 1117 corresponds to a gate of M2, the third electrode 1113 corresponds to a first pole of M2, the fourth electrode 1114 corresponds to a second pole of M2, the first fluid 113 and the second fluid 114 correspond to active layers of M2, and when the second voltage V2 of the sixth electrode 1118 is fixed, the liquid field effect transistor M2 controls the third electrode 1113 and the fourth electrode 1114 to be turned on or off according to the first voltage V1 of the fifth electrode 1117.
The operation of the display panel provided in this embodiment will be described by taking the first dielectric layer 1112 as a hydrophobic dielectric, and the first substrate 111 further includes a hydrophilic dielectric layer 1115 disposed on the sides of the third electrode 1113 and the fourth electrode 1114 facing away from the substrate 1111.
In the light transmitting stage, referring to fig. 2, the second voltage V2 of the sixth electrode 1118 can be kept at a fixed potential Vcom, the first voltage V1 of the fifth electrode 1117 is larger than Vcom, a forward electric field is formed (directed from the fifth electrode 1117 to the sixth electrode 1118), the wettability between the first fluid 113 and the first medium layer 1112 is deteriorated (satisfying the lippmann's equation), meanwhile, the wettability between the second fluid 114 and the first medium layer 1112 is enhanced, as the forward electric field is increased, so that the adsorption force between the first fluid 113 and the first medium layer 1112 is smaller than that between the second fluid 114 and the first medium layer 1112, the second fluid 114 will gradually replace the first fluid 113 to be filled between the third electrode 1113 and the fourth electrode 1114, the first fluid 113 will be pressed onto the third electrode 1113 and the fourth electrode 1114 on both sides, and at this time, a light-transmitting region is formed, and the peripheral driving circuit of the display substrate 10 is made conductive with the second electrode 104 and drives the display substrate 10 to emit light.
The peripheral driving circuit of the display substrate 10 may input the data voltage Vdata to the third electrode 1113. The brightness or the display gray scale of the display substrate 10 can be controlled by adjusting the magnitude of the data voltage Vdata. The OLED display substrate is a current control device, and the specific light-emitting color is determined according to actual conditions.
Due to the bistable property of electrowetting, the oil drop state of the first fluid 113 can be maintained for a long time, so that the fifth electrode 1117 and the sixth electrode 1118 of the electrowetting substrate can be controlled to be powered off after the first fluid 113 shrinks towards the hydrophilic medium layer 1115 on the left and right sides, thereby being beneficial to saving energy consumption.
In the opaque phase, referring to fig. 1, a first voltage V1 less than Vcom may be applied to the fifth electrode 1117 to form a negative electric field (directed from the sixth electrode 1118 to the fifth electrode 1117), so that the wettability of the first dielectric layer 1112 with the first fluid 113 is enhanced, meanwhile, the wettability between the second fluid 114 and the first dielectric layer 1112 is deteriorated, and as the negative electric field is increased to make the adsorption force between the first fluid 113 and the first dielectric layer 1112 larger than that between the second fluid 114 and the first dielectric layer 1112, the first fluid 113 is spread out and covers the third electrode 1113, the fourth electrode 1114 and the open area between the third electrode 1113 and the fourth electrode 1114, since the first fluid 113 is opaque, the electrowetting substrate 11 is in an opaque state, and since the first fluid 113 is insulating, the peripheral driving circuit of the display substrate 10 is disconnected from the second electrode 104, and the display substrate 10 does not emit light.
In practical applications, the absolute value of the difference between the first voltage V1 and the second voltage V2 may be greater than or equal to 15V and less than or equal to 30V, so as to ensure the directional movement of the first fluid 113.
It should be noted that the display panel provided in this embodiment can support both reflective and transmissive display types. In practical applications, specific display types can be determined according to ambient light, whether color display is required, and the like, and different display types can be realized by controlling the peripheral driving circuit of the display substrate 10.
For example, when the external ambient light is poor or color display is required, the display substrate 10 may be made to emit light by controlling the peripheral driving circuit, thereby realizing transmissive display.
When the external ambient light is strong and color display is not required, the display substrate 10 may not emit light by controlling the peripheral driving circuit, thereby implementing reflective display. Specifically, the peripheral driving circuit may be controlled to make the voltages of the first electrode 102 and the second electrode 104 of the display substrate 10 consistent, so that the display substrate 10 does not emit light all the time, and the display panel is a reflective display device and can be used in a situation with a low contrast requirement.
Another embodiment of the present application further provides a display device including the display panel according to any one of the embodiments.
The display device in this embodiment may be: any product or component with a display function, such as a display panel, electronic paper, a mobile phone, a tablet computer, a television, a notebook computer, a digital photo frame, a navigator and the like.
Another embodiment of the present application further provides a display method, which is applied to the display panel described in any embodiment, and the display method may include:
adjust external electric field, control first fluid flow, specifically include:
in the light transmission stage, controlling the first fluid to shrink, so that the second fluid is filled between the third electrode and the fourth electrode, and the third electrode and the fourth electrode are conducted; and in the light-tight stage, controlling the first fluid to be filled between the third electrode and the fourth electrode so as to disconnect the third electrode and the fourth electrode.
In one implementation, when the substrate includes the fifth electrode and the second substrate includes the sixth electrode, the step of adjusting the external electric field and controlling the flow of the first fluid includes:
inputting a first voltage to the fifth electrode and a second voltage to the sixth electrode;
and adjusting the magnitude of the first voltage and/or the second voltage to control the flow of the first fluid.
Specifically, the step of inputting the first voltage to the fifth electrode when the fifth electrode is connected to the thin film transistor includes:
a gate voltage is input to a gate of the thin film transistor, a first voltage is input to a first electrode of the thin film transistor, and the first voltage is written to the fifth electrode according to the gate voltage.
Wherein the absolute value of the difference between the first voltage and the second voltage is greater than or equal to 15V and less than or equal to 30V.
In one implementation manner, when the first dielectric layer is a hydrophobic dielectric and the first substrate further includes a hydrophilic dielectric layer disposed on a side of the third electrode and the fourth electrode away from the substrate, in the light transmitting stage, the first voltage is greater than the second voltage; in the opaque stage, the first voltage is less than the second voltage.
The display method provided by each of the above embodiments may further include:
the data voltage is input to the third electrode through the peripheral driving circuit.
In order to implement the conventional reflective display, before the step of adjusting the external electric field and controlling the flow of the first fluid, the display method may further include: the same voltage is input to the first electrode and the second electrode. In this case, the display panel does not emit light at all times, and can be used as a reflective display device in a case where a contrast requirement is low.
The embodiment of the application provides a display panel, a display device and a display method, wherein the display panel comprises a display substrate and an electrowetting substrate which are oppositely arranged; the display substrate comprises a peripheral driving circuit, a first electrode, an organic light-emitting layer and a second electrode, wherein the first electrode, the organic light-emitting layer and the second electrode are arranged on a substrate in a stacked mode; the electrowetting substrate comprises a first substrate and a second substrate which are oppositely arranged, a pixel defining layer, and a first fluid and a second fluid which are incompatible with each other and are filled between the first substrate and the second substrate, wherein the first fluid is light-proof and insulating, and the second fluid is light-transmitting and conductive; the first substrate is disposed proximate the second electrode and the second fluid is filled proximate the second substrate; the first substrate comprises a substrate arranged close to the second electrode, a first dielectric layer arranged on one side of the substrate, which is far away from the second electrode, and a third electrode and a fourth electrode which are arranged on one side of the first dielectric layer, which is far away from the substrate, and are separated from each other, wherein the third electrode is connected with the peripheral driving circuit, and the fourth electrode is connected with the second electrode; the first fluid can flow under the action of an external electric field so as to control the connection or disconnection between the third electrode and the fourth electrode. According to the technical scheme, the third electrode and the fourth electrode can be controlled to be conducted while the first fluid is controlled to flow to form the light transmission area, so that the peripheral driving circuit is connected with the second electrode of the display substrate to drive the display substrate to emit light, the light emitting stage of the display panel and the light transmission stage of the electrowetting panel can be synchronized without adding a logic control circuit, and the design cost is saved; and the transmission display mode can improve the contrast of the display panel, and is particularly suitable for outdoor display products with high brightness contrast.
The embodiments in the present specification are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be 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. Also, 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The display panel, the display device and the display method provided by the invention are described in detail, and the principle and the embodiment of the invention are explained by applying specific examples, and the description of the embodiments is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (12)
1. The display panel is characterized by comprising a display substrate and an electrowetting substrate which are oppositely arranged;
the display substrate comprises a peripheral driving circuit, a first electrode, an organic light-emitting layer and a second electrode, wherein the first electrode, the organic light-emitting layer and the second electrode are arranged on a substrate in a stacked mode;
the electrowetting substrate comprises a first substrate and a second substrate which are oppositely arranged, a pixel defining layer, and a first fluid and a second fluid which are incompatible with each other and are filled between the first substrate and the second substrate, wherein the first fluid is light-proof and insulating, and the second fluid is light-transmitting and conductive; the first substrate is disposed proximate the second electrode and the second fluid is filled proximate the second substrate;
the first substrate comprises a substrate arranged close to the second electrode, a first dielectric layer arranged on one side of the substrate, which is far away from the second electrode, and a third electrode and a fourth electrode which are arranged on one side of the first dielectric layer, which is far away from the substrate, and are separated from each other, wherein the third electrode is connected with the peripheral driving circuit, and the fourth electrode is connected with the second electrode;
the first fluid can flow under the action of an external electric field so as to control the connection or disconnection between the third electrode and the fourth electrode;
the first dielectric layer is a hydrophobic dielectric, and the first substrate further comprises a hydrophilic dielectric layer arranged on one side of the third electrode and the fourth electrode, which is far away from the substrate.
2. The display panel according to claim 1, wherein the substrate comprises a first insulating layer provided adjacent to the second electrode and a fifth electrode provided on a side of the first insulating layer facing away from the second electrode, and wherein the second substrate comprises a second insulating layer provided adjacent to the first substrate and a sixth electrode provided on a side of the second insulating layer facing away from the first substrate; and the fifth electrode and the sixth electrode are used for forming the external electric field and controlling the flow of the first fluid.
3. The display panel according to claim 2, wherein the substrate further comprises a thin film transistor disposed on a side of the first insulating layer facing away from the second electrode, the thin film transistor comprising a gate, a first electrode, and a second electrode, the second electrode being connected to the fifth electrode, the thin film transistor being configured to write a voltage of the first electrode to the fifth electrode according to a voltage of the gate.
4. The display panel of claim 1, wherein the pixel defining layer is a hydrophobic medium.
5. The display panel according to any one of claims 1 to 4, wherein the first fluid is an ink and the second fluid is a transparent salt solution.
6. A display device characterized by comprising the display panel according to any one of claims 1 to 5.
7. A display method for use in the display panel according to any one of claims 1 to 5, the display method comprising:
adjusting the external electric field to control the flow of the first fluid, comprising:
in the light transmission stage, controlling the first fluid to contract, so that the second fluid is filled between the third electrode and the fourth electrode, and the third electrode and the fourth electrode are conducted;
in the opaque stage, controlling the first fluid to be filled between the third electrode and the fourth electrode, so that the third electrode and the fourth electrode are disconnected;
when the first dielectric layer is a hydrophobic dielectric and the first substrate further comprises a hydrophilic dielectric layer arranged on the side of the third electrode and the fourth electrode departing from the substrate,
in the light transmission stage, the first voltage is greater than the second voltage;
in the opaque stage, the first voltage is smaller than the second voltage.
8. The method according to claim 7, wherein when the substrate includes a fifth electrode and the second substrate includes a sixth electrode, the step of adjusting the external electric field and controlling the flow of the first fluid includes:
inputting a first voltage to the fifth electrode and inputting a second voltage to the sixth electrode;
and adjusting the magnitude of the first voltage and/or the second voltage to control the flow of the first fluid.
9. The method according to claim 8, wherein the step of inputting the first voltage to the fifth electrode when the fifth electrode is connected to the thin film transistor comprises:
inputting a gate voltage to a gate of the thin film transistor, inputting the first voltage to a first electrode of the thin film transistor, and writing the first voltage into the fifth electrode according to the gate voltage.
10. The display method according to claim 9, wherein an absolute value of a difference between the first voltage and the second voltage is greater than or equal to 15V and less than or equal to 30V.
11. The display method according to any one of claims 7 to 10, further comprising:
inputting a data voltage to the third electrode through the peripheral driving circuit.
12. The method according to any one of claims 7 to 10, wherein before the step of adjusting the external electric field to control the flow of the first fluid, the method further comprises:
the same voltage is input to the first electrode and the second electrode.
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| US20120243070A1 (en) * | 2011-03-25 | 2012-09-27 | Delphi Technologies, Inc. | Display using a transreflective electrowetting layer |
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| CN106165002A (en) * | 2014-02-07 | 2016-11-23 | 三星电子株式会社 | Dual mode display |
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