CN210270463U

CN210270463U - Electronic paper display screen

Info

Publication number: CN210270463U
Application number: CN201920699178.8U
Authority: CN
Inventors: 胡典禄; 王喜杜; 曾晞; 陈宇
Original assignee: Guangzhou OED Technologies Co Ltd
Current assignee: Guangzhou OED Technologies Co Ltd
Priority date: 2019-05-16
Filing date: 2019-05-16
Publication date: 2020-04-07
Anticipated expiration: 2029-05-16

Abstract

The utility model relates to an electronic paper display screen, including the electrophoresis display layer, first base plate and second base plate, the electrophoresis display layer sets up between first base plate and second base plate, and the electrophoresis display layer includes a plurality of little units that show, and every shows little unit including the packaging shell, is equipped with the electrophoresis liquid in the packaging shell and suspends the electrophoresis particle in the electrophoresis liquid, and first base plate coats and is stamped the filter layer, and the shaping has active component array layer on the filter layer, and the second base plate covers there is conductive film, and active component array layer and conductive film are used for driving the electrophoresis display layer. By forming the active element array layer on the filter layer, no alignment and lamination process of the filter layer and the active element array layer is performed in the process of assembling the electronic paper, so that the alignment precision between the filter layer and the active element array layer can be ensured, and the electronic paper display screen has good display performance.

Description

Electronic paper display screen

Technical Field

The utility model relates to a display screen technical field, in particular to electronic paper display screen and manufacturing method thereof.

Background

The electronic paper display screen comprises an electrophoretic display layer, an optical filter, an electrode substrate covered with a conductive film, a driving substrate covered with an active element array layer, and an OCA layer attached to one surface of the electrode substrate, wherein the electrophoretic display layer is arranged between the other surface of the electrode substrate and the surface of the driving substrate provided with the active element array layer, the optical filter is attached to the OCA layer, and when the optical filter is attached to the OCA layer, the pixel unit of the optical filter is required to be accurately aligned with the pixel electrode of the active element array layer, however, a distance is formed between the optical filter and the driving substrate, namely, the distance is the sum of the thicknesses of the electrophoretic display layer and the OCA, so that the optical filter is not easy to be accurately aligned with the driving substrate during attachment, and after the optical filter is attached to the OCA, the optical filter cannot be moved again to adjust the attachment position of the optical filter, and the inaccurate alignment of the optical filter and the driving substrate is easy to occur, further influencing the display effect of the electronic paper display screen.

SUMMERY OF THE UTILITY MODEL

Based on this, the utility model provides an electronic paper display screen and preparation method that can realize accurate counterpoint of filter layer and active component array layer in the assembling process.

The utility model discloses a technical scheme be, an electronic paper display screen, including electrophoresis display layer, first base plate and second base plate, the electrophoresis display layer set up in between first base plate and the second base plate, the electrophoresis display layer includes a plurality of little units that show, and every shows little unit and includes the packaging shell, be equipped with the electrophoresis liquid in the packaging shell and suspend the electrophoresis particle in the electrophoresis liquid, first base plate coats and is stamped the filter layer, the shaping has active component array layer on the filter layer, the second base plate covers there is conductive film, active component array layer with conductive film is used for the drive the electrophoresis display layer.

As a further improvement of the above embodiment, the active device array layer is an active matrix thin film transistor layer.

As a further improvement of the above embodiment, the first substrate and the second substrate are both transparent.

As a further improvement of the above embodiment, a conductive circuit and a plurality of pixel electrodes are disposed on the active device array layer, the conductive circuit and the pixel electrodes are made of transparent materials, the filter layer includes a plurality of sub-pixel units, and one of the pixel electrodes corresponds to one of the sub-pixel units.

As a further improvement of the above embodiment, the filter layer is coated with a protective layer, which is transparent SiNx, SiO2 or a combination of SiNx and SiO 2.

As a further improvement of the above embodiment, the filter layer has a thickness of 0.5 to 3 μm.

As a further improvement of the above embodiment, the second substrate is a PET plate, the conductive film is an ITO electrode, and the display micro-unit is a microcapsule or a microcup.

The utility model also provides a manufacturing method of electronic paper display screen, including following step:

providing a first substrate, and forming a filter layer and an active element array layer on the first substrate in sequence;

providing a second substrate, and forming a conductive film on the second substrate;

manufacturing an electrophoretic display layer, and attaching one surface of the electrophoretic display layer to the conductive film on the second substrate; and laminating the other surface of the electrophoretic display layer on the surface of the first substrate provided with the active element array layer.

As a further improvement of the above embodiment, the filter layer is formed on the first substrate by printing, the active device array layer is formed by yellow light or roll-to-roll coating, and the conductive film is formed by inkjet printing, deposition or sputtering.

As a further improvement of the above embodiment, the method further includes the step of coating a protective layer on the surface of the filter layer before forming the active device array layer; or before the active component array layer is formed, coating a transparent optical adhesive layer on the surface of the filter layer and coating a protective layer on the transparent optical adhesive layer; the protective layer is transparent SiNx, SiO2 or a combination of SiNx and SiO 2.

The utility model discloses an electronic paper display screen passes through the shaping has the active element array layer on the filter layer, continuous shaping filter layer and active element array layer on first base plate promptly for there is not the filter layer at the in-process of equipment electronic paper and the laminating processing procedure of counterpointing of active element array layer, can ensure this counterpoint precision between the two, prevent both because of the counterpoint inaccurate condition such as colour mixture appears that leads to the electronic paper display screen, thereby guarantee the good display effect of electronic paper display screen.

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 partial structural sectional view of the electronic paper display screen of the present invention;

Detailed Description

In order to facilitate understanding of the present invention, the present invention will be described more fully hereinafter with reference to the accompanying drawings.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, the utility model provides an electronic paper display screen includes electrophoretic display layer 1, first base plate 2 and second base plate 3, and electrophoretic display layer 1 sets up between first base plate 2 and second base plate 3, and first base plate 2 passes through the circuit with second base plate 3 and is connected with the control unit for exert voltage at electrophoretic display layer 1 both ends, make electrophoretic display layer 1 show required content.

The electrophoretic display layer 1 comprises a plurality of display micro-units 11, each display micro-unit 11 comprises an encapsulating shell, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are filled in the encapsulating shell, a filter layer 4 is covered on one surface of a first substrate 2, an active component array layer 5 is formed on the filter layer 4, a conductive film 6 is covered on the surface of a second substrate 3, the active component array layer and the conductive film 6 are used for driving the electrophoretic display layer 1, in the embodiment, the first substrate 2 and the second substrate 3 are transparent, a viewer can see the electronic paper display screen to display contents to be displayed in a color display mode in a direction facing the first substrate 2, and can also see the electronic paper display screen to display the contents to be displayed in a black and white display mode in a direction facing the second substrate 3, namely one surface of the electronic paper display screen can display in a color mode, and the other surface can display in a black and white mode, i.e. a double-sided display effect is presented. Through the shaping active component array layer 5 on filter layer 4, form filter layer 4 and active component array layer 5 on first base plate 2 continuously, thus there is not filter layer 4 and 5 counterpoint laminating processes of active component array layer in the in-process of assembling the electronic paper, can guarantee the counterpoint precision between the two, can prevent both from leading to the electronic paper display screen to appear the circumstances such as colour mixture because of the counterpoint is inaccurate, in order to guarantee the good display effect of electronic paper display screen, still can reduce the base plate component that is used for bearing TFT, make the thickness of electronic paper display screen reduce and manufacturing cost reduce. And because the filter layer 4 and the electrophoretic display layer 1 are only separated by the thickness (only a few nanometers) of the active device array layer 5, the viewing angle of the electronic paper display screen can be increased, and the color pixels displayed at different angles are consistent.

The active device array layer 5(TFT) is used to control the display content of the electronic paper display screen, and is an active matrix thin film transistor layer, and the active matrix thin film transistor layer may be formed on the filter layer 4 by a yellow light process or a roll-to-roll coating method. The active matrix thin film transistor layer is an amorphous silicon thin film transistor array layer (a-Si TFT) or an Oxide thin film transistor array layer (Oxide TFT).

The active component array layer 5 is provided with a conductive circuit and a plurality of pixel electrodes, both the conductive circuit and the pixel electrodes are made of transparent TFT materials, so that the electronic paper display screen can display and observe on the first substrate 2 side or the second substrate 3 side (as shown by arrows in fig. 1), the filter layer 4 comprises a plurality of sub-pixel units, each sub-pixel unit comprises red, green and blue sub-pixel filter units, and one pixel electrode corresponds to one pixel unit.

In a preferred embodiment, due to the uneven surface of the filter layer 4, if a TFT layer is directly formed on the surface of the filter layer 4, which is prone to break or increase in resistance, the display effect of the electronic paper display screen may be further affected, so that a protective layer (not shown) is coated on the surface of the filter layer 4, on one hand, the surface of the filter layer 4 is made flat, and on the other hand, the filter layer 4 may be protected, the protective layer may be transparent SiNx, SiO2, or a combination of SiNx and SiO2, but other light-transmitting materials may be selected in other embodiments.

In another embodiment, the thickness of the filter layer 4 is 0.5-3 μm, and preferably, the thickness of the filter layer 4 is 3 μm, which is selected to achieve a smooth surface of the filter layer 4, which is beneficial for forming a TFT layer on the filter layer 4 to ensure good performance of the TFT layer.

The first substrate 2 is a glass substrate, the second substrate 3 is a PET plate, the PET plate and the electrophoretic display layer 1 are encapsulated by a sealant (not shown), the conductive film 6 is an ITO electrode, in other embodiments, the conductive film 6 may also be a graphene film, the display micro-cells 11 are microcapsules or microcups, and when a voltage is applied to two ends of the electrophoretic display layer 1 by the first substrate 2 and the second substrate 3, electrophoretic particles of different display micro-cells 11 move in an electrophoretic solution, so as to form a display image and text.

The utility model also provides a preparation method of making the electronic paper display screen of any of the above-mentioned embodiments, including following step:

providing a first substrate 2, and sequentially forming a filter layer 4 and an active component array layer 5 on the first substrate 2;

providing a second substrate 3, and forming a conductive film 6 on the second substrate;

manufacturing an electrophoretic display layer 1, and attaching one surface of the electrophoretic display layer 1 to a conductive film 6 on a second substrate 3; the other surface of the electrophoretic display layer 1 is laminated on the surface of the first substrate 2 provided with the active element array layer 5.

The filter layer 4 is formed on the first substrate 2 by printing, the active device array layer 5 is formed by yellow light process or roll-to-roll coating, and the conductive film 6 is formed by ink jet printing, deposition or sputtering.

As a further improvement of the above embodiment, the method for manufacturing an electronic paper display screen further includes a step of coating a protective layer on the surface of the filter layer 4 before forming the active device array layer 5, wherein the protective layer is configured to keep the surface of the filter layer 4 flat; or before the active component array layer 5 is formed, the optical transparent adhesive layer is coated on the surface of the filter layer 4, and the protective layer is coated on the transparent optical adhesive layer, so that the flatness of the surface of the filter layer 4 can be ensured and the filter layer 4 can be protected doubly by arranging the optical transparent adhesive layer and the protective layer; the protective layer is made of transparent SiNx, SiO2 or a combination of SiNx and SiO2, and in other embodiments, the protective layer can be made of other light-transmitting materials.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express the specific embodiments of the utility model, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The electronic paper display screen is characterized by comprising an electrophoretic display layer, a first substrate and a second substrate, wherein the electrophoretic display layer is arranged between the first substrate and the second substrate and comprises a plurality of display micro units, each display micro unit comprises an encapsulation shell, electrophoretic liquid and electrophoretic particles suspended in the electrophoretic liquid are contained in the encapsulation shell, a filter layer covers the first substrate, an active element array layer is formed on the filter layer, a conductive film covers the second substrate, and the active element array layer and the conductive film are used for driving the electrophoretic display layer.

2. The electronic paper display screen of claim 1 wherein the active device array layer is an active matrix thin film transistor layer.

3. The electronic paper display screen of claim 1, wherein the first substrate and the second substrate are both transparent.

4. The electronic paper display screen of claim 1, wherein the active device array layer is provided with a conductive circuit and a plurality of pixel electrodes, the conductive circuit and the pixel electrodes are made of transparent materials, the filter layer comprises a plurality of sub-pixel units, and one of the pixel electrodes corresponds to one of the sub-pixel units.

5. The electronic paper display screen of claim 1 wherein the filter layer is coated with a protective layer of transparent SiNx, SiO2 or a combination of SiNx and SiO 2.

6. The electronic paper display screen of claim 1 wherein the filter layer has a thickness of 0.5-3 μm.

7. The electronic paper display screen of claim 1, wherein the second substrate is a PET plate, the conductive film is an ITO electrode, and the display micro-unit is a microcapsule or a microcup.