WO2021217688A1

WO2021217688A1 - Display module with reflection structure, and method for manufacturing same

Info

Publication number: WO2021217688A1
Application number: PCT/CN2020/088694
Authority: WO
Inventors: 包进; 陈山; 杨扬; 唐振兴; 许俊
Original assignee: 无锡威峰科技股份有限公司
Priority date: 2020-04-30
Filing date: 2020-05-06
Publication date: 2021-11-04
Also published as: TWI748472B; CN111399304A; TW202142941A

Abstract

Provided are a display module with a reflection structure, and a method for manufacturing same. The display module comprises: an upper substrate component (100), the upper substrate component (100) comprising an upper panel (110) and a reflection layer (120) formed under the upper panel (110); and a lower substrate component (200), the lower substrate component (200) comprising a lower panel (210) and a pixel electrode (220) formed on the lower panel (210), wherein a display cavity is formed between the upper substrate component (100) and the lower substrate component (200), the display cavity is filled with display plasma (300), and the display plasma (300) can be in contact with the reflection layer (120) and the pixel electrode (220); and the surface of the reflection layer (120) in contact with the display plasma (300) comprises a plurality of cambered surfaces, and the cambered surfaces bulge towards the display plasma (300) and can reflect light incident in the direction of the upper panel (110). The manufacturing method is used for manufacturing the display module. By means of the display module with a reflection structure and the method for manufacturing same, the reflection brightness of a screen and color saturation can be further increased, an anti-reflection effect is achieved, and the pressure resistance capability of the display screen is improved.

Description

Display module with reflection structure and manufacturing method thereof

Technical field

This application relates to the field of electronic display, and in particular to a display module with a reflective structure and a manufacturing method thereof.

Background technique

Electrophoretic display technology uses charged colloids to move under the action of an electric field, and electrophoretic particles with different photoelectric properties are driven by the electric field to display images and text. Compared with other known display technologies, the electrophoretic ink display screen has: flexible and easy to bend, light weight, thin thickness, high contrast, low energy consumption, large viewing angle, readable in sunlight, image bi-stable, easy Large-scale production and other characteristics.

The related art display screens include microcup type and microcapsule type, which have darker reflection brightness and low color saturation.

Summary of the invention

In order to solve the deficiencies in the related technology, the present application provides a display module with a reflective structure and a manufacturing method thereof, which can further enhance the reflective brightness of the screen, enhance the color saturation, and achieve the effect of increasing the reflection and reducing the reflection, and at the same time improve the display screen. The pressure capacity.

According to the technical solution provided by the present application, as a first aspect of the present application, a display module with a reflective structure is provided, the display module including:

An upper substrate assembly, the upper substrate assembly includes an upper panel, and a reflective layer formed under the upper panel;

A lower substrate assembly, the lower substrate assembly includes a lower panel, and a pixel electrode formed on the lower panel;

A display cavity is formed between the upper substrate assembly and the lower substrate assembly, and the display cavity is filled with display plasma, and the display plasma can contact the reflective layer and the pixel electrode;

The surface of the reflective layer in contact with the display plasma includes a plurality of arcs, and the arcs bulge in the display plasma and can reflect light incident from the direction of the upper panel.

Exemplarily, the reflective layer includes:

A plurality of micro-reflective units arranged in an array, the lower surface of the micro-reflective units can be in contact with the display plasma;

The lower surface of the micro-reflective unit is a curved surface protruding toward the display plasma.

Exemplarily, the display plasma includes: plasma particles and supporting microspheres, and the supporting microspheres are supported between the adjacent micro-reflecting unit and the lower substrate assembly.

Exemplarily, the pixel electrodes are arranged in an array on the lower plate, and a gap is formed between adjacent pixel electrodes; a plasma barrier weir is formed on the gap, and the plasma barrier weir is connected to the A plasma flow port is formed between the ITO layers.

Exemplarily, the edge of the display cavity is sealed with a sealing frame.

Exemplarily, supporting microspheres are provided in the sealing frame.

Exemplarily, a color filter is provided between the upper panel and the reflective layer.

Exemplarily, an ITO layer is formed on the curved surface of the reflective layer.

As a second aspect of the present application, a method for manufacturing a display module with a reflective structure is provided, which includes at least the following steps:

The first step: dispensing glue on the edge of the upper surface of the lower substrate assembly where the plasma barrier weir is formed to form a sealing frame;

Step 2: Provide an upper panel, fabricate a reflective layer on the lower surface of the upper panel, and form an upper substrate assembly;

The third step: printing display plasma under the surface of the reflective layer;

The fourth step: aligning, pre-pressing, pre-pressing and curing the upper substrate assembly and the lower substrate assembly, so that a display cavity is formed between the upper substrate assembly, the lower substrate assembly and the sealing frame, and the display Plasma is filled in the display cavity;

Step 5: Fabricate integrated circuits and flexible circuit boards on the lower board of the lower substrate assembly, and package and cure them.

A method for manufacturing a display module with a reflective structure includes at least the following steps:

The first step: provide an upper panel, fabricate a reflective layer on the lower surface of the upper panel, and form an upper substrate assembly;

The second step: dispensing glue on the edge of the reflective layer surface to form a sealing frame;

The third step: printing display plasma on the upper surface of the lower substrate assembly where the plasma barrier weir is formed;

It can be seen from the above that the display module with a reflective structure and the manufacturing method thereof provided in the present application can further enhance the reflective brightness of the screen, enhance the color saturation, and achieve the effect of increasing the reflection and reducing the reflection compared with related technologies. At the same time, it has the advantage of improving the pressure resistance of the display.

Description of the drawings

FIG. 1 is a schematic cross-sectional structure diagram of a display module with a reflective structure provided by an embodiment of the application.

Fig. 2 is a schematic diagram of an enlarged structure of part A in Fig. 1.

FIG. 3 is a schematic diagram of a half-sectional structure of a display module with a reflective structure provided by an embodiment of the application.

Fig. 4 is a schematic diagram of an enlarged structure of part B in Fig. 3.

FIG. 5 is a schematic diagram of a first arrangement structure of micro-reflective units in an embodiment of the application.

FIG. 6 is a schematic diagram of a second arrangement structure of micro-reflective units in an embodiment of the application.

100. Upper substrate assembly, 110. Upper panel, 120. Reflective layer, 121. Micro reflection unit, 122. ITO layer, 200. Lower substrate assembly, 210. Lower panel, 220. Pixel electrode, 230. Plasma barrier weir, 231. Plasma flow port, 300. Display plasma, 310. Plasma black particles, 320. Plasma white particles, 330. Supporting microspheres, 400. Sealing frame, 410. Conductive gold beads, 500. Color filter piece.

Detailed ways

In order to make the objectives, technical solutions, and advantages of the present application clearer, the following further describes the present application in detail in conjunction with specific embodiments and with reference to the accompanying drawings. The same parts are indicated by the same reference numerals. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings. The words "inner" and "outer" are used to refer to directions toward or away from the geometric center of a specific component, respectively.

Patent US3892568 discloses the preparation process of an electrophoretic display material containing at least one electrophoretic particle. Patent JP1086116 discloses an electrophoretic display system that contains at least one type of electrophoretic particles and the electrophoresis fluid is coated with microcapsules. In US6930818, an electrophoresis display unit that uses a microcup structure to cover the electrophoresis solution is disclosed. In patents US5930026, US5961804, US6017584 and US6120588, microcapsule-coated electrophoretic display units are disclosed, in which the display plasma contains two or more electrophoretic particles with different photoelectric properties.

This embodiment provides a display module with a reflective structure. Referring to FIGS. 1 to 4, it includes:

The upper substrate assembly 100 includes an upper panel 110 and a reflective layer 120 formed under the upper panel 110, and the reflective layer 120 is used to reflect light incident from the direction of the upper panel 110; exemplary Ground, the upper substrate assembly 100 is a transparent ITO board, the material of the upper panel 110 is transparent glass, and the material of the reflective layer 120 can be optical grade acrylic resin, transparent polymer, transparent inorganic material, transparent composite material And other materials, have good reflection effect, of which optical grade acrylic resin can improve the reflection brightness and color saturation by 30%.

The lower substrate assembly 200 includes a lower panel 210 and a pixel electrode 220 formed on the lower panel 210; for example, the lower substrate assembly 200 is a TFT glass substrate, wherein the material of the lower panel 210 can be It is transparent glass.

A display cavity is formed between the upper substrate assembly 100 and the lower substrate assembly 200, the display cavity is filled with a display plasma 300, and the display plasma 300 can contact the reflective layer 120 and the pixel electrode 220; exemplary In particular, the display plasma 300 includes two different colors of plasma particles, namely, the plasma black particles 310 and the plasma white particles 320, respectively.

The surface of the reflective layer 120 that can be in contact with the display plasma 300 includes a plurality of arcs, and the arcs bulge in the display plasma 300; the arcs can reflect light incident from the direction of the upper panel 110. An ITO layer is formed on the arc surface;

It is understandable that the light incident from the direction of the upper panel 110 can be reflected at the curved surface, and the multiple curved surfaces in the display plasma 300 can evenly disperse the plasma particles in the display plasma 300 .

The reflective layer 120 includes a plurality of micro-reflective units 121, the plurality of micro-reflective units 121 are arranged in an array, the lower surface of the micro-reflective units 121 can be in contact with the display plasma 300, and the micro-reflective units 121 The bottom surface of is a curved surface that bulges toward the display plasma 300. The plurality of micro-reflecting units 121 can play the role of reflecting light, and can make the plasma particles in the display plasma 300 uniformly dispersed. Exemplarily, the micro-reflection unit 121 is hemispherical, and the height of the hemispherical micro-reflection unit 121 is 0.5-20 micrometers, preferably 1-5 micrometers, and the diameter is

Micron, preferably

Micrometers; the micro-reflective unit 121 can be realized by spin coating, optical etching, thermal curing or light curing.

It should be explained that the arrangement of a plurality of the micro-reflecting units 121 in an array may include the following embodiments: First, referring to FIG. The reflection unit 121 is aligned front and rear, left and right. Second, referring to FIG. 6, the micro-reflective unit 121 array includes multiple rows and multiple columns, and the micro-reflective units 121 between adjacent rows are sequentially shifted to the left or to the right.

In order to improve the press resistance and image display stability of the screen, so that the image will not be blurred or deformed by pressing the screen during the display process, the display plasma 300 also includes and supports microspheres 330, and the support microspheres 330 support Between the adjacent micro-reflective unit 121 and the lower substrate assembly 200; for example, the diameter of the supporting microsphere 330 is 2-60 microns, preferably 5-30 microns, and the material can be resin, and the supporting microspheres The ball 330 is located between two adjacent micro-reflecting units 121 and can play a supporting and fixing role.

The pixel electrodes 220 are arranged in an array on the lower panel 210, and a gap is formed between adjacent pixel electrodes 220; in order to uniformly disperse and stabilize the display plasma 300, a plasma barrier weir 230 is formed on the gap A plasma flow port 231 is formed between the plasma blocking weir 230 and the reflective layer 120 of the upper substrate assembly 100. Exemplarily, the material of the plasma barrier weir 230 can be optical grade acrylic resin, transparent polymer, transparent inorganic material, transparent composite material and other materials, preferably optical grade acrylic resin; The plasma barrier weir 230 is formed on the gap by spin coating, optical etching, thermal curing or light curing. The height of the plasma barrier weir 230 is 0.1-60 microns, preferably the height is 1-10 microns, the width is 1-30 microns, and the width is preferably 5-15 microns. The size of the plasma flow opening 231 can be adopted Supporting microspheres 330 of different sizes and diameters can be realized, and the size of the plasma flow opening 231 is 0.1-10 micrometers, preferably 0.5-1.5 micrometers.

The edge of the display cavity is sealed with a sealing frame 400. The sealing frame 400 includes conductive gold beads 410 and/or supporting microspheres 330. The supporting microspheres 330 can improve the stability and strength of the sealing frame 400 and at the same time. The conductivity of the conductive gold beads 410. Exemplarily, the width of the sealing frame 400 is 2 to 300 microns, preferably 50 to 200 microns, and the height of the sealing frame 400 is 2 to 50 microns, preferably 5 to 20 microns.

In this embodiment, a color filter 500 is provided between the upper panel 110 and the reflective layer 120.

The manufacturing method for manufacturing the display module with the reflective structure provided in this embodiment includes the following two embodiments:

Example 1:

Step 1: Provide the lower substrate assembly 200 formed with the plasma barrier weir 230, place the lower substrate assembly 200 formed with the plasma barrier weir 230 on the dispensing platform, and dispense glue on the edge of the upper surface of the lower substrate assembly 200 to form a seal Plastic frame 400.

The lower substrate assembly 200 includes a lower panel 210 and a pixel electrode 220 formed on the lower panel 210; for example, the lower substrate assembly 200 is a TFT glass substrate, and the material of the lower panel 210 may be transparent glass.

The second step: providing the upper panel 110, and fabricating the reflective layer 120 on the lower surface of the upper panel 110 to form the upper substrate assembly 100.

Exemplarily, the surface of the reflective layer 120 includes a plurality of curved surfaces, the reflective layer 120 can reflect light incident from the direction of the upper panel 110, the upper substrate assembly 100 is transparent, and the material of the upper panel 110 is transparent The material of the reflective layer 120 can be optical grade acrylic resin, transparent polymer, transparent inorganic material, transparent composite material and other materials, which has good reflection effect. Among them, optical grade acrylic resin can increase the reflective brightness by 30% And color saturation.

The third step: printing the display plasma 300 under the surface of the reflective layer 120.

The display plasma 300 can be in contact with the surface of the reflective layer 120, and the curved surfaces included in the surface of the reflective layer 120 all bulge into the display plasma 300. The display plasma 300 includes two different colors of plasma particles, namely, the plasma black particles 310 and the plasma white particles 320, respectively.

Exemplarily, when printing the display plasma 300 under the surface of the reflective layer 120, a screen printing device may be used to print the display plasma 300 on the surface of the reflective layer 120. In order to improve the press resistance and image display stability of the screen, so that the image will not be blurred or deformed by pressing the screen during the display process, the display plasma 300 may also include a support for supporting the upper substrate assembly 100 and the lower substrate assembly 200 The diameter of the supporting microspheres 330 is 2-60 micrometers, preferably 5-30 micrometers, and the material can be resin. The supporting microspheres 330 are located between two adjacent micro-reflecting units 121, Can play a supporting and fixing role.

Step 4: Align and pre-press the upper substrate assembly 100 and the lower substrate assembly 200, so that a display cavity is formed between the upper substrate assembly 100, the lower substrate assembly 200 and the sealing frame 400, and the display plasma 300 is filled in the display In the cavity, the sealing frame 400 seals the display plasma 300 to which it belongs.

Exemplarily, the upper substrate assembly 100 and the lower substrate assembly 200 are aligned and pre-pressed by a pre-pressing machine, so that the lower surface of the upper substrate assembly 100 and the upper surface of the lower substrate are opposite and aligned.

The fifth step: perform the current pressing, light curing and thermal curing on the device obtained after the fourth step is completed.

Exemplarily, the device obtained after the fourth step is completed is subjected to this pressing and light curing in sequence by this pressing machine, and thermal curing is carried out by an oven.

The sixth step: fabricating an integrated circuit (IC) and a flexible circuit board (FPC) on the lower panel 210 of the lower substrate assembly 200, and encapsulating the integrated circuit and the flexible circuit board with blue glue, and curing by ultraviolet irradiation.

Example 2:

The first step is to provide the upper panel 110, and fabricate the reflective layer 120 on the lower surface of the upper panel 110 to form the upper substrate assembly 100.

The second step: dispensing glue on the edge of the surface of the reflective layer 120 to form a sealing frame 400.

Illustratively, the upper substrate assembly 100 is placed on a glue dispensing platform to perform a glue dispensing operation.

The third step: printing the display plasma 300 on the upper surface of the lower substrate assembly 200 where the plasma blocking weir 230 is formed.

The lower substrate assembly 200 includes a lower panel 210 and pixel electrodes 220 formed on the lower panel 210; the lower substrate assembly 200 is a TFT glass substrate, and the material of the lower panel 210 may be transparent glass. The display plasma 300 can be in contact with the surface of the reflective layer 120, and the curved surfaces included in the surface of the reflective layer 120 all bulge into the display plasma 300. The display plasma 300 includes two different colors of plasma particles, namely, the plasma black particles 310 and the plasma white particles 320, respectively.

Exemplarily, when printing the display plasma 300, a screen printing device may be used to print the display plasma 300 on the upper surface of the lower substrate assembly 200. In order to improve the press resistance and image display stability of the screen, so that the image will not be blurred or deformed by pressing the screen during the display process, the display plasma 300 may also include a support for supporting the upper substrate assembly 100 and the lower substrate assembly 200 The diameter of the supporting microspheres 330 is 2-60 micrometers, preferably 5-30 micrometers, and the material can be resin. The supporting microspheres 330 are located between two adjacent micro-reflecting units 121, Can play a supporting and fixing role.

For the above two embodiments of the manufacturing method, the reflective layer 120 includes a plurality of micro-reflective units 121, the plurality of micro-reflective units 121 are arranged in an array, and the lower surface of the micro-reflective unit 121 can be connected to the display The plasma 300 is in contact, and the lower surface of the micro-reflective unit 121 is a curved surface protruding into the display plasma 300. The plurality of micro-reflecting units 121 can play the role of reflecting light, and can make the plasma particles in the display plasma 300 uniformly dispersed. Exemplarily, the micro-reflection unit 121 is hemispherical, and the height of the hemispherical micro-reflection unit 121 is 0.5-20 micrometers, preferably 1-5 micrometers, and the diameter is

Micron, preferably

The edge of the display cavity is sealed with a sealing frame 400. The sealing frame 400 includes conductive gold beads 410 and supporting microspheres 330. The supporting microspheres 330 can improve the stability and strength of the sealing frame 400, and at the same time improve the Conductivity of conductive gold beads 410. Exemplarily, the width of the sealing frame 400 is 2 to 300 microns, preferably 50 to 200 microns, and the height of the sealing frame 400 is 2 to 50 microns, preferably 5 to 20 microns.

A color filter 500 is provided between the upper panel 110 and the reflective layer 120.

Reflective structure technology can also be applied to microcapsule or microcup electronic paper display, bistable reflective liquid crystal display and LCD liquid crystal display.

Those of ordinary skill in the art should understand that the above descriptions are only specific embodiments of the application and are not intended to limit the application. Any modification, equivalent replacement, improvement, etc. made within the spirit of the application, All should be included in the scope of protection of this application.

Claims

A display module with a reflective structure, characterized in that the display module includes:

An upper substrate assembly (100), the upper substrate assembly (100) includes an upper panel (110), and a reflective layer (120) formed under the upper panel (110);

A lower substrate assembly (200), the lower substrate assembly (200) includes a lower panel (210), and a pixel electrode (220) formed on the lower panel (210);

A display cavity is formed between the upper substrate assembly (100) and the lower substrate assembly (200), and the display cavity is filled with display plasma (300), and the display plasma (300) can interact with the reflective layer ( 120) Contact with the pixel electrode (220);

The surface of the reflective layer (120) in contact with the display plasma (300) includes a plurality of arcs, and the arcs bulge in the display plasma (300) and can reflect incident from the direction of the upper panel (110). Light.
The display module with a reflective structure according to claim 1, wherein the reflective layer (120) comprises:

A plurality of micro-reflective units (121) arranged in an array, the lower surface of the micro-reflective units (121) can be in contact with the display plasma (300);

The lower surface of the micro-reflective unit (121) is a curved surface protruding toward the display plasma (300).
The display module with a reflective structure according to claim 1, wherein the display plasma (300) comprises: plasma particles and supporting microspheres (330), and the supporting microspheres (330) are supported on Adjacent to the micro-reflective unit (121) and the lower substrate assembly (200).
The display module with a reflective structure according to claim 1, wherein the pixel electrodes (220) are arranged in an array on the lower panel (210), and the pixel electrodes (220) are adjacent to each other. A gap is formed between the gap; a plasma barrier weir (230) is formed on the gap, and a plasma flow port (231) is formed between the plasma barrier weir (230) and the ITO layer.
The display module with a reflective structure according to claim 1, wherein the edge of the display cavity is sealed with a sealing frame (400).
The display module with a reflective structure according to claim 5, wherein supporting microspheres (330) are provided in the sealing frame (400).
The display module with a reflective structure according to claim 1, wherein a color filter (500) is provided between the upper panel (110) and the reflective layer (120).
The display module with a reflective structure according to claim 1, wherein an ITO layer (122) is formed on the curved surface of the reflective layer (120).
A manufacturing method of a display module with a reflective structure, which is characterized in that it comprises at least the following steps:

The first step: dispensing glue on the edge of the upper surface of the lower substrate assembly (200) where the plasma barrier weir (230) is formed to form a sealing frame (400);

Step 2: Provide an upper panel (110), fabricate a reflective layer (120) on the lower surface of the upper panel (110) to form an upper substrate assembly (100);

The third step: printing display plasma (300) under the surface of the reflective layer (120);

The fourth step: the upper substrate assembly (100) and the lower substrate assembly (200) are aligned, pre-pressed, locally pressed and cured, so that the upper substrate assembly (100) and the lower substrate assembly (200) A display cavity is formed between and the sealing frame (400), and the display plasma (300) is filled in the display cavity;

The fifth step: fabricating integrated circuits and flexible circuit boards on the lower panel (210) of the lower substrate assembly (200) and packaging and curing them.
A manufacturing method of a display module with a reflective structure, characterized in that:

The first step: providing an upper panel (110), fabricating a reflective layer (120) on the lower surface of the upper panel (110) to form an upper substrate assembly (100);

The second step: dispensing glue on the edge of the reflective layer (120) to form a sealing frame (400);

The third step: printing display plasma (300) on the upper surface of the lower substrate assembly (200) on which the plasma blocking weir (230) is formed;

The fourth step: the upper substrate assembly (100) and the lower substrate assembly (200) are aligned, pre-pressed, locally pressed and cured, so that the upper substrate assembly (100) and the lower substrate assembly (200) A display cavity is formed between and the sealing frame (400), and the display plasma (300) is filled in the display cavity;

The fifth step: fabricating integrated circuits and flexible circuit boards on the lower panel (210) of the lower substrate assembly (200) and packaging and curing them.