阅读说明：本技术 一种电泳显示膜片及电泳显示器 (Electrophoretic display diaphragm and electrophoretic display ) 是由 胡典禄 王喜杜 曾晞 陈宇 于 2020-03-27 设计创作，主要内容包括：本发明提供一种电泳显示膜片和电泳显示器,本发明提供的电泳显示膜片,包括透明导电电极和电泳显示层,所述电泳显示层由具有微胶囊的电泳液涂布于所述透明导电电极上固化后得到,所述透明导电电极的电压释放时间小于12秒,所述电压释放时间为对透明导电电极施加测试电压后,透明导电电极从初始电压值释放到平稳电压值的时间,所述初始电压值为对透明导电电极施加测试电压后,对透明导电电极测试得到的初始电压值,所述平稳电压值定义为透明导电电极施加测定电压后,测试得到的初始电压值后,透明导电电极的电压值在预设时间内变化值小于5mv的数值。本发明提供的电泳显示膜片和电泳显示器的显示效果更好。(The invention provides an electrophoretic display membrane and an electrophoretic display, the electrophoretic display membrane provided by the invention comprises a transparent conductive electrode and an electrophoretic display layer, the electrophoretic display layer is obtained by coating electrophoretic liquid with microcapsules on the transparent conductive electrode and solidifying, the voltage release time of the transparent conductive electrode is less than 12 seconds, the voltage release time is the time for releasing the transparent conductive electrode from an initial voltage value to a stable voltage value after applying a test voltage on the transparent conductive electrode, the initial voltage value is the initial voltage value obtained by testing the transparent conductive electrode after applying the test voltage on the transparent conductive electrode, and the stable voltage value is defined as the value of less than 5mv of the voltage value of the transparent conductive electrode in a preset time after applying a measured voltage on the transparent conductive electrode and testing the obtained initial voltage value. The electrophoretic display diaphragm and the electrophoretic display provided by the invention have better display effect.)

1. An electrophoretic display membrane is characterized by comprising a transparent conductive electrode and an electrophoretic display layer, wherein the electrophoretic display layer is obtained by coating electrophoretic liquid with microcapsules on the transparent conductive electrode and solidifying, the voltage release time of the transparent conductive electrode is less than 12 seconds, the voltage release time is the time for releasing the transparent conductive electrode from an initial voltage value to a stable voltage value after applying a test voltage on the transparent conductive electrode, the initial voltage value is the initial voltage value obtained by testing the transparent conductive electrode after applying the test voltage on the transparent conductive electrode, and the stable voltage value is defined as the value of the voltage value of the transparent conductive electrode which changes by less than 5mv within a preset time after applying a measurement voltage on the transparent conductive electrode and testing the obtained initial voltage value.

2. An electrophoretic display film as in claim 1 wherein the transparent conductive has a voltage release time of less than 10 seconds.

3. The electrophoretic display film of claim 1, wherein the test voltage is a continuous unidirectional pulsed voltage.

4. The electrophoretic display film of claim 1, wherein the plateau voltage is defined as a value at which the voltage value of the transparent conductive electrode changes by less than 5mv within 10 seconds after the transparent conductive electrode is subjected to a test voltage and an initial voltage value is obtained.

5. The electrophoretic display film of claim 1, wherein the voltage release time is a time for the transparent conductive electrode to release from an initial voltage value to a plateau voltage value after the transparent conductive electrode is applied with a test voltage to drive the color to a brightness saturation value.

6. The electrophoretic display film of claim 1, wherein the microcapsule contains electrically different electrophoretic particles of a first color and electrophoretic particles of a second color, and the transparent conductive electrode is driven to the first color and the second color respectively by applying a test voltage, and the voltage release time is less than 10 seconds.

7. The electrophoretic display film of claim 1, wherein the voltage release time of the transparent conductive electrode is detected by an oscilloscope.

8. An electrophoretic display film as claimed in claim 1, wherein the plateau voltage value is defined as a value at which the voltage value changes by less than 3mv within a predetermined time after the transparent conductive electrode is applied with the measurement voltage.

9. An electrophoretic display comprising a second conductive layer and the electrophoretic display membrane of any one of claims 1-8, wherein the electrophoretic display membrane is connected to the second conductive layer by an adhesive layer, and the transparent conductive electrode and the second conductive layer are disposed at two ends of the electrophoretic display layer for applying an electrical signal to the two ends of the electrophoretic display layer to move the electrophoretic particles in the microcapsules.

10. An electrophoretic display film as in claim 9 wherein the transparent conductive electrode is ITO.

Technical Field

The invention belongs to the technical field of electrophoretic display, and particularly relates to an electrophoretic display diaphragm and an electrophoretic display.

Background

Electrophoretic displays have the advantages of high contrast, wide viewing angles, low power consumption, bistability, and the like. The display effect of the novel liquid crystal display is the same as that of common paper, so that people can read comfortably, and the novel liquid crystal display can be converted and refreshed to display new contents like a common liquid crystal display. The use of electrophoretic display reduces the felling of wood, and is beneficial to realizing green ecology, so people pursue the application.

In the preparation process of the conventional electrophoretic display, firstly, an electrophoretic coating liquid is coated on an indium tin oxide semiconductor (ITO), the electrophoretic coating liquid is cured to obtain an electrophoretic display layer, the electrophoretic display layer and the ITO form an electrophoretic display membrane, and then the electrophoretic display membrane is attached to a driving back plate through an adhesive to obtain a finished product of the electrophoretic display, L attenuation value (brightness attenuation value) is a very important parameter for evaluating the quality of the electrophoretic display, and a small current and voltage residue of a driving plate, a Thin Film Transistor (TFT) and other structural components added to the electrophoretic display affects the display screen.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides an electrophoretic display diaphragm and an electrophoretic display with better display effect.

The invention provides an electrophoretic display membrane, which comprises a transparent conductive electrode and an electrophoretic display layer, wherein the electrophoretic display layer is obtained by coating electrophoretic liquid with microcapsules on the transparent conductive electrode and solidifying, the voltage release time of the transparent conductive electrode is less than 12 seconds, the voltage release time is the time for releasing the transparent conductive electrode from an initial voltage value to a stable voltage value after applying a test voltage on the transparent conductive electrode, the initial voltage value is the initial voltage value obtained by testing the transparent conductive electrode after applying the test voltage on the transparent conductive electrode, and the stable voltage value is defined as the value of the voltage value of the transparent conductive electrode which changes by less than 5mv within the preset time after applying a measured voltage on the transparent conductive electrode and testing the obtained initial voltage value.

Preferably, the voltage release time of the transparent conductor is less than 10 seconds.

Preferably, the test voltage is a continuous unidirectional pulse voltage.

Preferably, the stable voltage value is defined as a value that the voltage value of the transparent conductive electrode changes by less than 5mv within 10 seconds after the initial voltage value obtained by testing after the determination voltage is applied to the transparent conductive electrode.

Preferably, the voltage release time is a time for releasing the transparent conductive electrode from an initial voltage value to a steady voltage value after applying a test voltage to the transparent conductive electrode to drive the color to a brightness saturation value.

Preferably, the microcapsule contains electrically different and different colored electrophoretic particles of a first color and electrophoretic particles of a second color, and the transparent conductive electrode is driven to the first color and the second color respectively by applying a test voltage, and the voltage release time is less than 10 seconds.

Preferably, the voltage release time of the transparent conductive electrode is detected by an oscilloscope.

Preferably, the stable voltage value is defined as a value of which the voltage value changes by less than 3mv within a preset time after the transparent conductive electrode applies the measuring voltage.

The invention also provides an electrophoretic display, which comprises a second conductive layer and the electrophoretic display membrane of any one of claims 1 to 8, wherein the electrophoretic display membrane is connected with the second conductive layer through an adhesive layer, and the transparent conductive electrode and the second conductive layer are arranged at two ends of the electrophoretic display layer and are used for applying an electric signal to two ends of the electrophoretic display layer to move electrophoretic particles in the microcapsules.

Preferably the transparent conductive electrode is ITO.

The electrophoretic display diaphragm and the electrophoretic display provided by the invention have better display effect.

Drawings

The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.

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

Detailed Description

The technical solutions of the present invention are further described in detail with reference to specific examples so that those skilled in the art can better understand the present invention and can implement the present invention, but the examples are not intended to limit the present invention.

The embodiment of the invention provides an electrophoretic display membrane, which comprises a transparent conductive electrode and an electrophoretic display layer, wherein the electrophoretic display layer is obtained by coating electrophoretic liquid with microcapsules on the transparent conductive electrode and solidifying the electrophoretic liquid, the electrophoretic liquid comprises glue water and the microcapsules dispersed in the glue water, electrophoretic particles with different electric properties are contained in the microcapsules, the voltage release time of the transparent conductive electrode is less than 12 seconds, the voltage release time is the time for releasing the transparent conductive electrode from an initial voltage value to a stable voltage value after applying test voltage to the transparent conductive electrode, the initial voltage value is the initial voltage value obtained by testing the transparent conductive electrode after applying the test voltage to the transparent conductive electrode, the voltage of the transparent conductive electrode is continuously reduced and released along with the increase of time, the voltage value is basically unchanged after being reduced to a certain value, and the basically unchanged value is the stable voltage value, the period of time is voltage release time, the specific stable voltage value is defined as that after the transparent conductive electrode applies the measured voltage, the voltage is continuously released after the initial voltage value obtained by testing is obtained, and when the voltage value of the transparent conductive electrode is less than 5mv in the preset time, the value is the stable voltage value.

The applicant finds that the voltage release time of the transparent conductive electrode is in direct proportion to the brightness attenuation value of the electrophoretic display, and when the voltage release time of the electrophoretic display membrane is less than 15 seconds, the brightness attenuation value of the electrophoretic display prepared by the electrophoretic display membrane is small, and the electrophoretic display can have a good display effect. The electrophoresis display diaphragm of this embodiment is less than 15 seconds through the limited voltage release time, and the electrophoresis display diaphragm that realizes obtaining follow-up preparation becomes electrophoresis display and can have less degree attenuation value, realizes can promoting the yields of preparing electrophoresis display through control voltage release time at electrophoresis display diaphragm stage. The yield of the electrophoretic display can be improved to a large extent, and the cost is saved to a large extent.

In a preferred embodiment, the voltage release time of the transparent conductive film is less than 10 seconds, which can further ensure that the brightness attenuation value of the electrophoretic display prepared by the electrophoretic display film of the embodiment is small, so that the prepared electrophoretic display maintains high yield.

In a preferred embodiment, the test voltage is a continuous unidirectional pulsed voltage. In a preferred embodiment, the voltage release time of the transparent conductive electrode is detected by an oscilloscope. In this embodiment, the driving test is performed by using the continuous unidirectional pulse voltage, and after the driving test is completed, the voltage release time of the transparent conductive electrode is measured by using the oscilloscope.

In a preferred embodiment, the stable voltage value is defined as a value that the voltage value of the transparent conductive electrode changes by less than 5mv within 10 seconds after the initial voltage value obtained by testing after the determination voltage is applied to the transparent conductive electrode.

In a preferred embodiment, the voltage release time is a time for releasing the transparent conductive electrode from an initial voltage value to a steady voltage value after applying a test voltage to the transparent conductive electrode to drive the color to a brightness saturation value. The color brightness saturation value of the embodiment is obtained according to a saturation curve, and the saturation curve test is to apply unidirectional pulse voltages with different frame frequency time at two ends of the electrophoretic display layer; and respectively measuring the display brightness corresponding to different time after the voltage is applied, recording the brightness value of 800ms at 100-. For a specific test method, the electrophoretic display membrane of this embodiment can be tested by referring to the test means disclosed in patent publication No. CN 110231743A. For example, the test result shows that the electrophoretic display film has the maximum brightness value in 240ms, and the test method of the voltage release time is as follows: and applying a test voltage to the transparent conductive electrode, judging that the color is driven to a brightness saturation value when the driving time is 240ms, finishing the pulse voltage, and detecting the time of releasing the transparent conductive electrode from an initial voltage value to a stable voltage value by using an oscilloscope.

In a preferred embodiment, in the electrophoretic display membrane, the microcapsule contains a first color electrophoretic particle and a second color electrophoretic particle with different electric properties and different colors, and after the transparent conductive electrode is applied with the test voltage and respectively driven to the first color and the second color, the voltage release time is less than 10 seconds. The driving to the first color in this embodiment refers to driving to the brightness saturation value of the first color, and the driving to the second color in this embodiment refers to driving to the brightness saturation value of the second color. In this embodiment, the first color is a color of the electrophoretic particles of the first color, and the second color is a color of the electrophoretic particles of the second color.

In a preferred embodiment, the electrophoretic display film comprises black electrophoretic particles and white electrophoretic particles with different electric properties and different colors in a microcapsule, and the voltage release time is less than 10 seconds after the transparent conductive electrode is applied with a test voltage and respectively driven to black and white. For example, after applying a test voltage to the transparent conductive electrode of the electrophoretic display film and driving the transparent conductive electrode to black, the voltage release time of the transparent conductive electrode of the electrophoretic display film of the embodiment is less than 10 seconds; after applying a test voltage to the transparent conductive electrode of the electrophoretic display film and driving the transparent conductive electrode to white, the voltage release time of the transparent conductive electrode of the electrophoretic display film of the embodiment is also less than 10 seconds.

In a preferred embodiment, the stable voltage value is defined as a value of which the voltage value changes by less than 3mv within a preset time after the transparent conductive electrode is applied with the measuring voltage.

Referring to fig. 1, this embodiment further provides an electrophoretic display, which includes a second conductive layer 4 and the electrophoretic display membrane of any of the above embodiments, where the electrophoretic display membrane is connected to the second conductive layer 4 through an adhesive layer, and the transparent conductive electrode 1 and the second conductive layer 4 are disposed at two ends of the electrophoretic display layer 2, and are used to apply an electrical signal to two ends of the electrophoretic display layer 2, so as to move electrophoretic particles in the microcapsules 21. The electrophoretic display of this embodiment comprises a transparent conductive electrode 1, an electrophoretic display layer 2, an adhesive layer 3 and a second conductive layer 4 in sequence.

In the electrophoretic display of the embodiment, because the voltage release time of the transparent conductive electrode is limited to be less than 15 seconds in the control of the electrophoretic display diaphragm, the electrophoretic display can have a smaller brightness attenuation value, and the display performance of the electrophoretic display is ensured.

In a preferred embodiment, the transparent conductive electrode is ITO, and the second conductive layer 4 is TFT, ITO, or a conductive copper layer, etc.

The technical scheme and the technical effect of the invention are further described in detail by combining the embodiment and the comparative example.

Testing of saturation curves:

unidirectional pulse voltages with different frame frequency time are applied to two ends of the electrophoretic display layer, corresponding brightness at different time is measured respectively, saturation curves driven to white and black are obtained, and pulse time reaching corresponding color saturation values can be obtained.

Testing of voltage release time:

and applying continuous unidirectional pulse voltage to the electrophoretic display film, setting pulse time to drive the electrophoretic display film to a white saturated state and a black saturated state respectively, and finishing pulse voltage driving.

And testing the voltage variation value of the transparent conductive electrode and the common electrode for grounding along with time by using an oscilloscope, setting the initial value as an initial voltage value, regarding that a voltage variation curve is stabilized to a voltage minimum value when the voltage value fluctuates within 5mv within 10 seconds, and recording the time from the voltage maximum value to the voltage minimum value.