TWI691775B - Closed display plasma module and manufacturing method thereof - Google Patents

Abstract

The invention belongs to the technical field of electronic display, and relates to a closed display plasma module, including a pixel electrode and a transparent electrode located above the pixel electrode, a display plasma and a gasket frame surrounding the display plasma are arranged between the pixel electrode and the transparent electrode ; The pixel electrode is provided with a plasma barrier array for uniformly dispersing and stabilizing the display plasma. In the vertical direction, the plasma barrier array penetrates the entire display plasma; the transparent electrode is coated with a layer of transparent glue and a layer of transparent glue It is in contact with the display plasma and pressed together with the top of the plasma blocking array; the display plasma module of the present invention directly uses the display plasma to replace the existing microcup structure or microcapsules and is set in the display plasma Plasma blocking array, and the transparent electrode with transparent glue layer is pressed on the plasma blocking array to form a closed structure, which effectively prevents the disordered flow of the display plasma and guarantees the direction of the electric field between the pixel electrode and the transparent electrode Verticality.

Description

Closed display plasma module and manufacturing method thereof

The invention relates to a display plasma module and a manufacturing method thereof, in particular to a closed display plasma module and a manufacturing method thereof, which belong to the technical field of electronic display.

Electrophoretic display utilizes the phenomenon that charged colloidal particles are swimming under the action of an electric field. The electrophoretic particles of different photoelectric properties are driven by the electric field to display images and text. Compared with known display technologies, electrophoretic display has the following characteristics: flexibility Easy to bend, light weight, thin thickness, high contrast, low energy consumption, large viewing angle, readable in sunlight, with image bistable, easy to large-scale production and other characteristics.

Electrophoretic display technology was first proposed in the 1970s. Patent US3892568 discloses a preparation process of an electrophoretic display material containing at least one electrophoretic particle. Patent JP1086116 discloses an electrophoretic display system containing at least one kind of electrophoretic particles, and the electrophoretic liquid is coated with microcapsules. In US6930818, an electrophoretic display unit using a microcup structure to coat an electrophoretic liquid is disclosed. In the 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. Looking at the prior art, the microcup and microcapsule type electronic ink display screens are based on tiny cavity structures, namely microcups and microcapsules. The role of these two microstructures is to disperse the display plasma.

Although both structures of the display are used in actual products, the two structures have the following disadvantages:

1) The microcapsules and microcups do not have the display function. Although their constituent materials are mostly transparent materials with poor hiding power, the large amount used in the entire electrophoretic display system will affect the display effect of the entire display, and the contrast will decrease. Reduced resolution and reduced service life;

2) The existence of the microcapsule and microcup structure undoubtedly increases the thickness of the entire electrophoretic display material layer, which reduces the display screen contrast and resolution, slow response speed, high driving voltage, slow refresh, large power consumption, and narrow operating temperature range;

3) The preparation process of the microcapsule and microcup structure is too complicated, causing difficulties and waste in manufacturing, resulting in a decrease in yield, waste of materials, and high manufacturing costs.

In view of this, our inventors are devoted to further research and embarked on research and development and improvement, with a better design to solve the above problems, and after continuous testing and modification, the invention came out.

The purpose of the present invention is to provide a closed display plasma module and its manufacturing method in view of the problems of the current electronic display screen, which can directly use the display plasma to replace the existing microcup structure or microcapsule and set it in the display plasma Plasma blocking array for evenly dispersing, stabilizing and isolating display plasma, and laminating transparent electrodes on the plasma blocking array through transparent glue to form a closed structure, effectively preventing the disordered flow of display plasma, The perpendicularity of the electric field direction between the pixel electrode and the transparent electrode is guaranteed.

To achieve the above technical objectives, the technical solution of the present invention is: a closed display plasma module, including a pixel electrode and a transparent electrode located above the pixel electrode, characterized in that a display circuit is provided between the pixel electrode and the transparent electrode A plasma and a gasket frame surrounding the display plasma; a plasma barrier array for uniformly dispersing and stabilizing the display plasma is provided on the pixel electrode, and in the vertical direction, the plasma barrier array penetrates the entire display Plasma; a transparent glue layer is coated on the transparent electrode, the transparent glue layer is in contact with the display plasma, and is pressed together with the top of the plasma blocking array.

Further, the plasma barrier array includes several plasma barrier frames distributed in an array, the pixel electrode includes several pixel electrode units distributed in array, and each plasma barrier frame includes several pixels Electrode unit.

Further, the width of the frame of the plasma barrier frame in the plasma barrier array is between 2-12 microns, and the side length of each plasma barrier frame is between 1-10 mm, the gasket The width of the frame is 2-300 microns.

Further, the materials of the plasma blocking frame and the gasket frame in the plasma blocking array are acrylic resin, polyurethane resin, epoxy resin, silicone resin or silicon dioxide, and the material of the transparent glue layer is Acrylic resin, polyurethane resin, polyester resin or epoxy resin.

Further, the transparent electrode includes a conductive layer and a transparent substrate covering the conductive layer; the transparent glue layer is coated under the conductive layer, between the gasket frame and the transparent glue layer, in the A protective layer for the display area is pressed between the edge of the display plasma and the transparent glue layer.

Further, the pixel electrode is embedded on the TFT glass substrate, and the pixel electrode and the display plasma are adhered by a light-shielding insulating glue layer.

Further, the thickness of the display plasma does not exceed the height of the plasma barrier array, and the viscosity of the electrophoretic liquid in the display plasma is 100-100000 centipoises. The display plasma contains at least two different photoelectric properties Electrophoretic particles.

To achieve the above technical objective, the present invention also provides a method for manufacturing a closed display plasma module, which is characterized by including the following steps:

Step one. Prepare the plasma barrier array on the pixel electrode in advance;

Step 2. Embed the pixel electrode in the TFT glass substrate, and place the TFT glass substrate on the dispensing platform;

Step 3. Click the sealant on the pixel electrode to form a gasket frame;

Step 4. Screen display plasma within the frame formed by the liner frame, the display plasma is filled with plasma to block the array;

Step 5. Apply conductive silver paste in the frame of the gasket, the conductive silver paste is electrically connected to the pixel electrode;

Step 6. Pre-coat a transparent glue layer on the conductive layer of the transparent electrode;

Step 7. Laminate the display area protection on the entire liner frame, and then press the transparent electrode coated with the transparent glue layer on the liner frame and the plasma barrier array in the display plasma at high temperature to display The plasma is enclosed in the plasma blocking frame of the plasma blocking array and cured, and the conductive layer of the transparent electrode is electrically connected to the conductive silver paste;

Step 8. Cut off the edge part of the transparent electrode and the protective layer of the display area to expose the predetermined position on the pixel electrode where the IC integrated circuit module and the flexible circuit board are bound;

Step 9. Adhere the IC integrated circuit module and the flexible circuit board to the edge of the pixel electrode through a conductive adhesive strip;

Step 10. The IC integrated circuit module, the flexible circuit board and the conductive adhesive strip are fixed on the pixel electrode by blue glue to complete the manufacture of the closed display plasma module.

Further, in the first step, the surface of the pixel electrode may be pre-coated with a light-shielding insulating glue layer; in the third step, the supporting microspheres may be pre-coated in the frame sealing glue.

Further, in the first step, the plasma barrier array is coated on the pixel electrode by printing, coating or dispensing, and then cured by light, heat or moisture, or by physical growth or chemical The growth mode is realized; in the sixth step, the transparent glue layer is covered on the conductive layer of the transparent electrode by printing, coating, coating or laminating.

Compared with the traditional electronic ink display screen, the present invention has the following advantages:

1) Compared with the traditional microstructure electrophoretic display screen, since the traditional microcapsules or microcups are not involved in the display, it will affect the display effect. The present invention uses a display plasma, removing the microcapsules or microcups, the display effect is better, The contrast is increased by more than 10%, and the response time is reduced to less than 80 milliseconds, the driving voltage is reduced to between plus and minus 1.5-8V, and the operating temperature range is widened to -30-70 degrees, reducing the production cost;

2) The present invention provides a plasma blocking array between the pixel electrode and the transparent electrode, which can effectively disperse and stabilize the display plasma; at the same time, the transparent electrode is laminated on the plasma blocking array through transparent glue to make the display plasma It is divided into several closed plasma barriers, which guarantees the directionality and verticality of the electric field between the pixel electrode and the transparent electrode, and prevents the disordered movement of the electrophoretic particles in the display plasma;

3) The protective layer of the display area of the present invention protects the display plasma in the display area, and plays the role of shading and insulation;

4) The light-shielding insulating glue layer of the present invention is used to protect the pixel electrode from optical irradiation, isolate the display plasma and the pixel electrode, and prevent the display plasma from damaging the pixel electrode;

5) The processing method of the present invention can produce large-scale ultra-thin display plasma modules over 100 inches.

With regard to the technical means of our inventors, a few preferred embodiments and drawings are described in detail below, in order to provide an in-depth understanding and approval of the present invention.

The present invention will be further described below with reference to specific drawings and embodiments.

The present invention is not limited to the following embodiments. The drawings referred to in the following description are provided for understanding the content of the present invention, that is, the present invention is not limited to the structure of the electronic ink display screen exemplified in the drawings.

As shown in FIGS. 1 and 2, Example 1 takes a two-particle electronic ink display screen as an example, a closed display plasma module includes a pixel electrode 13 and a transparent electrode 1 located above the pixel electrode 13, A display plasma 3 and a gasket frame 6 surrounding the display plasma 3 are provided between the pixel electrode 13 and the transparent electrode 1; a plasma barrier for uniformly dispersing and stabilizing the display plasma 3 is provided on the pixel electrode 13 Array 14, in the vertical direction, the plasma blocking array 14 penetrates the entire display plasma 3; a transparent glue layer 16 is coated on the transparent electrode 1, and the transparent glue layer 16 is in contact with the display plasma 3, And pressed together with the top of the plasma blocking array 14.

The transparent electrode 1 includes a conductive layer 2 and a transparent substrate 15 overlying the conductive layer 2; the transparent glue layer 16 is coated under the conductive layer 2, the gasket frame 6 and the transparent glue layer There are 16, between the edge of the display plasma 3 and the transparent glue layer 16, there is a display area protective layer 8 pressed together, and the side of the gasket frame 6 is provided with an IC integrated circuit module 11 and a flexible circuit board 12, The IC integrated circuit module 11 and the flexible circuit board 12 are adhered to the pixel electrode 13 by a conductive adhesive strip, and the IC integrated circuit module 11, the flexible circuit board 12 and the conductive adhesive strip are fixedly sealed on the pixel electrode 13 by a blue glue 9 The pixel electrode 13 is embedded on the TFT glass substrate 7, and the pixel electrode 13 and the display plasma 3 are adhered by a light-shielding insulating glue layer 5 to protect the pixel electrode 13 from academic irradiation, which affects the performance of the display and The service life also isolates the display plasma 3 and the pixel electrode 13 to prevent the display plasma 3 from damaging the pixel electrode 13.

The plasma blocking array 14 includes several plasma blocking frames distributed in an array, the pixel electrode 13 includes several pixel electrode units distributed in an array, and each plasma blocking frame includes several pixel electrodes Unit, and the border of each plasma barrier is located between the pixel electrode units; by pressing the transparent electrode 1 coated with the transparent glue layer 16 on the plasma barrier array 14, combined with the gasket border 6, The entire display plasma 3 is divided into several closed frame closed structures. Under the drive of the IC integrated circuit module 11, the pixel electrode 13 may include a segment code, a dot matrix, etc. Due to the existence of the closed barrier structure , So that the electrophoretic particles can only move vertically up and down in the direction of the electric field between the pixel electrode 13 and the transparent electrode 1, which effectively prevents the disordered movement of the electrophoretic particles in the display plasma 3, and at the same time due to the support effect of the plasma blocking the array 14, Ensure the stability of the display plasma 3, improve the display contrast and display effect;

In this embodiment 1, the thickness of the display plasma 3 is not greater than the height of the plasma barrier array 14, and the height of the plasma resistance array 14 is approximately equal to the height of the pad frame 6, indicating the viscosity of the electrophoretic liquid in the plasma 3 100 to 100,000 centipoise, the width of the plasma barrier frame in the plasma barrier array 14 is between 2-12 microns, and the side length of each plasma barrier frame is between 1-10 mm The width of the gasket frame 6 is 2-300 microns; the plasma barrier frame and the gasket frame 6 in the plasma barrier array 14 are made of acrylic resin, polyurethane resin, epoxy resin, or silicone Resin or silicon dioxide; the material of the display protective layer 8 includes polyurethane, acrylic resin, epoxy resin or natural polymer, and the material of the transparent glue layer 16 is acrylic resin, polyurethane resin, polyester resin or epoxy resin The material of the light-shielding insulating glue layer 5 includes polyurethane, acrylic resin, epoxy resin, natural polymer, etc. The glue may be water-type, solvent-type, hot-melt type, photo-curable type, etc.; the conductive layer 2 includes ITO, silver nanowires, graphene, carbon nanotubes, etc. The transparent substrate 15 includes glass, plastic, and glass or plastic with a protective layer. The plastic substrate includes PI, PEN, PET, etc. The protective layer is It is deposited on the surface of the substrate by evaporation, and the protective layer has the functions of waterproof and ultraviolet protection.

A method for manufacturing a closed display plasma module in Embodiment 1 of the present invention includes the following steps:

Step one. Prepare the plasma barrier array 14 on the pixel electrode 13 in advance;

In this embodiment, the surface of the pixel electrode 13 may be pre-coated with a light-shielding insulating glue layer 5;

The plasma barrier array 14 is coated on the pixel electrode 13 by printing, coating or dispensing, and then cured by light, heat or moisture, or by physical growth or chemical growth;

Step 2. Embed the pixel electrode 13 in the TFT glass substrate 7 and place the TFT glass substrate 7 on the dispensing platform;

Step 3. Point sealant on the pixel electrode 13 to form a gasket frame 6;

In this embodiment, a supporting microsphere 4 may be pre-coated in the gasket frame 6, and the supporting microsphere 4 is used to increase the strength of the gasket frame 6, thereby making the entire display plasma module more stable;

Step 4. Screen display plasma 3 within the frame formed by the gasket frame 6, the display plasma 3 fills the entire plasma barrier array 14;

Step five. Coat conductive silver paste 10 in the gasket frame 6, the conductive silver paste 10 is electrically connected to the pixel electrode 13;

Step 6. Preparing a transparent glue layer 16 on the conductive layer 2 of the transparent electrode 1 (including the conductive layer 2 and the transparent substrate 15);

The transparent glue layer 16 covers the conductive layer 2 of the transparent electrode 1 by printing, coating, coating or laminating;

Step 7. Press the protective layer 8 of the display area on the entire gasket frame 6, and then press the transparent electrode 1 coated with the transparent glue layer 16 on the gasket frame 6 and the plasma resistance of the display plasma 3 at high temperature On the isolation array 14, the display plasma 3 is enclosed in the plasma isolation frame of the plasma isolation array 14 and cured, where the conductive layer 2 of the transparent electrode 1 is electrically connected to the conductive silver paste 10;

Step 8. Cut off the edge part of the transparent electrode 1 and the display area protection layer 8 to expose the predetermined position on the pixel electrode 13 where the IC integrated circuit module 11 and the flexible circuit board 12 are bound;

Step 9. The IC integrated circuit module 11 and the flexible circuit board 12 are adhered to the edge of the pixel electrode 13 through a conductive adhesive strip;

Step 10. The IC integrated circuit module 11, the flexible circuit board 12 and the conductive adhesive strip are fixedly sealed on the pixel electrode 13 by blue glue 9 to complete the manufacture of the closed display plasma module.

The display plasma 3 of the present invention contains at least two electrophoretic particles with different photoelectric properties, and electrophoretic particles with different photoelectric properties. The preferred colors of the electrophoretic particles include white, black, red, green, blue, and yellow, etc. , Single-color, dual-color, multi-color, and true-color displays, while displaying plasma 3 can contain fluorescent materials, fluorescent materials include inorganic fluorescent materials and organic fluorescent materials, inorganic fluorescent materials include rare-earth fluorescent materials, metal sulfides, etc., Organic fluorescent materials include small molecule fluorescent materials and polymer fluorescent materials.

The display plasma module of the present invention does not require the use of traditional microstructures such as microcapsules or microcups. The display plasma 3 is directly used, and a plasma blocking array is provided in the display plasma 3 between the transparent electrode 1 and the pixel electrode 13 14. Used to support the entire display plasma module, and the height of the plasma blocking array 14 is equal to the thickness of the display plasma 3, and the transparent electrode 1 coated with the transparent glue layer 16 is pressed against the plasma blocking On the array 14 and the gasket frame 6, the entire display plasma 3 is divided into a plurality of enclosed plasma barriers. Under the action of an electric field, the electrophoretic particles in the plasma barriers are vertically and orderly along the direction of the electric field The movement ensures the stability of the display plasma and improves the display contrast and display effect.

The present invention and its embodiments have been described above. The description is not limiting, and the drawings shown are only one of the embodiments of the present invention, and the actual structure is not limited thereto. In a word, if anyone with ordinary knowledge in the technical field to which the present invention belongs is inspired by it, without departing from the creative purpose of the present invention, designing structural methods and embodiments similar to the technical solution without progress shall belong to this The scope of protection of the invention.

In summary, the technical methods disclosed in the present invention can effectively solve the problems of conventional knowledge, etc., and achieve the expected purpose and effect, and have not been published in the publication before the application, have not been publicly used, and have long-term progress. The invention mentioned in the Patent Law is correct, so I filed an application in accordance with the law, and sincerely wish Jun Shanghui to give a detailed examination and grant the invention patent.

However, the above are only a few preferred embodiments of the present invention, which should not be used to limit the scope of the present invention, that is, any equivalent changes and modifications made according to the scope of the patent application of the present invention and the content of the description of the invention It should still fall within the scope of this invention patent.

〔this invention〕

1: transparent electrode

10: conductive silver paste

11: IC integrated circuit module

12: flexible circuit board

13: Pixel electrode

14: Plasma blocking array

15: Transparent substrate

16: Transparent glue layer

2: conductive layer

3: display plasma

4: Support microsphere

5: shading insulation glue layer

6: pad frame

7: TFT glass substrate

8: Display area protection layer

9: Blue glue

Figure 1 is a schematic diagram of the present invention. FIG. 2 is an enlarged schematic cross-sectional view of part A in FIG. 1.

13: Pixel electrode

14: Plasma blocking array

15: Transparent substrate

16: Transparent glue layer

2: conductive layer

3: display plasma

4: Support microsphere

5: shading insulation glue layer

6: pad frame

7: TFT glass substrate

8: Display area protection layer

9: Blue glue

Claims (10)

A closed display plasma module includes a pixel electrode (13) and a transparent electrode (1) located above the pixel electrode (13), characterized in that a pixel electrode (13) and a transparent electrode (1) are provided between Display plasma (3) and a gasket frame (6) surrounding the display plasma (3); the pixel electrode (13) is provided with plasma blocking for evenly dispersing and stabilizing the display plasma (3) Array (14), in the vertical direction, the plasma blocking array (14) penetrates the entire display plasma (3); a transparent glue layer (16) is coated on the transparent electrode (1), the transparent The glue layer (16) is in contact with the display plasma (3) and pressed together with the top of the plasma barrier array (14). A closed display plasma module as described in item 1 of the patent application scope, wherein the plasma blocking array (14) includes a plurality of plasma blocking frames distributed in an array, and the pixel electrode (13 ) Includes several pixel electrode units distributed in an array, and each plasma blocking frame includes several pixel electrode units. A closed display plasma module as described in item 1 of the patent application range, wherein the frame width of the plasma barrier frame in the plasma barrier array (14) is between 2-12 microns, and each The length of the side of each plasma blocking frame is between 1-10 mm, and the width of the gasket frame (6) is 2-300 μm. A closed display plasma module as described in item 1 of the patent application range, wherein the materials of the plasma barrier frame and the gasket frame (6) in the plasma barrier array (14) are acrylic resin , Polyurethane resin, epoxy resin, silicone resin or silicon dioxide, the material of the transparent glue layer (16) is acrylic resin, polyurethane resin, polyester resin or epoxy resin. A closed display plasma module as described in item 1 of the patent application scope, wherein the transparent electrode (1) includes a conductive layer (2) and a transparent substrate (2) covering the conductive layer (2) 15); the transparent glue layer (16) is coated under the conductive layer (2), and the gasket frame (6) is transparent A protective layer (8) for the display area is pressed between the gelatin water layer (16) and between the edge of the display plasma (3) and the transparent glue layer (16). A closed display plasma module as described in item 1 of the patent application scope, wherein the pixel electrode (13) is embedded on the TFT glass substrate (7), and the pixel electrode (13) and the display plasma ( 3) It is adhered by a layer of light-shielding insulating glue (5). A closed display plasma module as described in item 1 of the patent application range, wherein the thickness of the display plasma (3) does not exceed the height of the plasma barrier array (14), and the display plasma (3 ), the viscosity of the electrophoretic liquid is 100-100000 centipoise, and the display plasma (3) contains at least two electrophoretic particles with different photoelectric properties. A method for manufacturing a closed display plasma module, characterized in that it includes the following steps: Step 1. A plasma barrier array (14) is prepared on the pixel electrode (13) in advance; Step 2. The pixel electrode (13) Embed in the TFT glass substrate (7), and place the TFT glass substrate (7) on the dispensing platform; Step 3. Click the frame sealant on the pixel electrode (13) to form the gasket frame (6) ); Step four. Screen display plasma (3) in the frame formed by the gasket frame (6), the display plasma (3) is filled with the plasma barrier array (14); Step five. A conductive silver paste (10) is coated in the gasket frame (6), and the conductive silver paste (10) is electrically connected to the pixel electrode (13); Step 6. The conductive layer of the transparent electrode (1) ( 2) Pre-coat the transparent glue layer (16) prepared in advance; Step 7. Press the protective layer (8) of the display area on the entire frame (6) of the gasket, and then coat the transparent glue layer The transparent electrode (1) of (16) is pressed on the gasket frame (6) and the plasma blocking array (14) in the display plasma (3) at high temperature, and the display Plasma (3) Enclosed in the plasma barrier frame of the plasma barrier array (14) and cured, and the conductive layer (2) of the transparent electrode (1) is electrically connected to the conductive silver paste (10) Step 8. Cut off the edge part of the transparent electrode (1) and the display area protective layer (8), exposing the pixel electrode (13) on the IC integrated circuit module (11) and flexible circuit board (12) tied The predetermined predetermined position; Step 9. The IC integrated circuit module (11) and the flexible circuit board (12) are adhered to the edge of the pixel electrode (13) through a conductive adhesive strip; Step 10. The ten The IC integrated circuit module (11), the flexible circuit board (12) and the conductive adhesive strip are fixedly sealed on the pixel electrode (13) by blue glue (9) to complete the manufacture of the closed display plasma module. A method for manufacturing a closed display plasma module as described in item 8 of the patent application scope, wherein in the first step, the surface of the pixel electrode (13) may be pre-coated with a light-shielding insulating glue layer (5) ; In the third step, the supporting microspheres (4) can be pre-coated in the frame sealant. A method for manufacturing a closed display plasma module as described in item 8 of the patent application scope, wherein in the first step, the plasma barrier array (14) is coated by printing, coating or dispensing On the pixel electrode (13), it is cured by light, heat or moisture, or by physical growth or chemical growth; in the sixth step, the transparent glue layer (16) is printed, coated, The conductive layer (2) of the transparent electrode (1) is covered with a film or laminated.

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