CN111856833A - A spliced electrophoretic display and preparation method thereof - Google Patents

Abstract

The invention provides a spliced electrophoretic display and a preparation method thereof. The spliced electrophoretic display provided by the invention comprises an upper protective layer, a display layer and a lower protective layer which are stacked and connected in sequence from top to bottom, and an edge sealing glue layer is arranged around the display layer. The upper end of the edge sealing adhesive layer is connected to the upper protective layer, and the lower end is connected to the lower protective layer. The display layer is formed by open splicing of a plurality of electrophoretic display blocks. There is an upper splicing area on the upper surface of the display layer between adjacent electrophoretic display blocks. There is a lower splicing area on the lower surface of the display layer between the blocks, the upper protective layer covers a plurality of electrophoretic display blocks and the upper splicing area between the electrophoretic display blocks, and the lower protective layer covers the lower splicing area; the electrophoretic display blocks from top to bottom sequentially include A transparent conductive layer, an electrophoretic display layer and a driving backplane. The electrophoretic display layer includes a plurality of display micro-units, and the display micro-units are encapsulated with electrophoretic liquid and electrophoretic particles dispersed in the electrophoretic liquid. The splicing electrophoretic display provided by the invention has better display effect.

Description

A spliced electrophoretic display and preparation method thereof

technical field

The invention belongs to the technical field of electrophoretic displays, and in particular relates to a spliced electrophoretic display and a preparation method thereof.

Background technique

Electrophoretic electronic paper is a new type of display material. It is a bistable display technology based on the principle of electrophoresis and has a wide range of uses. It has excellent properties such as ultra-low energy consumption, thin paper, can be bent, and book-like clarity. Changes in shades to express text and pictures, and the display effect is very similar to real paper books. Due to process problems, the size of the electronic paper display is limited, and the yield of the large-sized electronic paper display is low, resulting in extremely high cost, which greatly restricts the application and development of the electronic paper display.

As shown in FIG. 1 of the existing spliced electronic paper display, each display screen 10 has an edge-sealing glue area 2 on both sides of the display area 1, resulting in an undisplayable edge-sealing glue area between adjacent display screens. , the connection effect between different display screens is very poor, and the large-screen display effect cannot be better achieved.

SUMMARY OF THE INVENTION

In view of the deficiencies of the prior art, the present invention provides a splicing electrophoretic display with better display effect and a preparation method thereof.

The invention provides a spliced electrophoretic display, which comprises an upper protective layer, a display layer and a lower protective layer which are stacked and connected in sequence from top to bottom, an edge sealing glue layer is arranged around the display layer, and the upper end of the edge sealing glue layer is connected to the upper protective layer. The upper protective layer is connected to the lower protective layer at the lower end, and the display layer is formed by open splicing of a plurality of electrophoretic display blocks. There is an upper splicing area on the upper surface of the display layer between adjacent electrophoretic display blocks. There is a lower splicing area on the lower surface of the display layer between the display blocks, the upper protective layer covers the plurality of electrophoretic display blocks and the upper splicing area between the electrophoretic display blocks, and the lower protective layer covers the The lower splicing area; the electrophoretic display block includes a transparent conductive layer, an electrophoretic display layer and a driving backplane in sequence from top to bottom, the electrophoretic display layer includes a plurality of display micro-units, and the display micro-units are encapsulated with electrophoretic liquid and The electrophoretic particles dispersed in the electrophoretic liquid, the transparent conductive layer and the driving backplane are used to apply electrical signals at both ends of the electrophoretic display layer to make the electrophoretic particles move in the electrophoretic liquid.

Preferably, the edges of the transparent conductive layer, the electrophoretic display layer and the driving backplane form a flush cut surface, and adjacent electrophoretic display blocks are spliced with their flush cut surfaces as opposite surfaces.

Preferably, the material of the electrophoretic display layer at the cut surface is the same as the material of the middle of the electrophoretic display layer.

Preferably, the electrophoretic display layer includes a conductive solid adhesive and a plurality of microcapsules distributed in the conductive solid adhesive, and the material of the electrophoretic display layer on the cut surface includes the conductive solid adhesive agent.

Preferably, the display surface of the display layer includes a display area, and two opposite sides outside the display area are respectively provided with driver chips, and the driver chips are disposed in the edge sealing adhesive layer or in the edge sealing Outside the adhesive layer, it is used to drive the display layer to display.

Preferably, the display layer is formed by splicing multiple groups of splicing units along a first direction, each group of splicing units is formed by arranging two electrophoretic display blocks along a second direction, and the first direction is perpendicular to the second direction , the driving chips are arranged on opposite sides parallel to the first direction outside the display area.

Preferably, the display surface of the display layer includes a display area, the display surface of each electrophoretic display block includes a micro-display area and a micro-edge sealing area on one side of the display area, and the micro-display areas of a plurality of electrophoretic display blocks are formed by splicing In the display area, a driver chip is arranged in the micro-sealing area, and the driver chip is used to drive the display area of the corresponding electrophoretic display block to display.

Preferably, the bottom surface of the electrophoretic display layer of each electrophoretic display block is provided with a plurality of sub-pixel driving electrodes and wires arranged under the plurality of sub-pixel driving electrodes, and the display area covers the corresponding plurality of sub-pixel driving electrodes and is arranged on the plurality of sub-pixels. The wires under the driving electrodes, the plurality of sub-pixel driving electrodes are connected to the driving chip through wires, and the wires are used to provide scanning signals and image signals for the electrophoretic display block.

Preferably, each electrophoretic display block is provided with a connecting line, the connecting line is disposed on the side of the electrophoretic display block with the micro-sealed area, and the connecting line sequentially connects the transparent conductive layer, the electrophoretic display layer and the drive backplane.

Preferably, the upper protective layer is integrally formed and covers the upper surface of the display layer, and the lower protective layer is integrally formed and covers the lower surface of the display layer; or,

The upper protective layer is integrally formed and covers the upper surface of the display layer, the lower protective layer includes a splicing protection block and an edge sealing block, the splicing protection block covers the lower splicing area, and the edge sealing block is connected with the edge sealing block. Connect the lower end of the edge sealant.

The present invention also provides a preparation method of a spliced electrophoretic display, comprising the following steps:

forming an initial electrophoretic display block of a transparent conductive layer, an electrophoretic display layer and a driving backplane in sequence from top to bottom;

cutting the edge of the initial electrophoretic display block to make the cut surface flat, and the material of the cut surface is the same as the material in the middle of the electrophoretic display layer, to obtain an electrophoretic display block;

A plurality of electrophoretic display blocks are openly spliced to form an electrophoretic display layer, and adjacent electrophoretic display blocks are spliced with their flush cut surfaces as opposite surfaces;

Cover the upper protective layer and the lower protective layer above and below the display layer respectively;

After covering the upper protective layer and the lower protective layer, encapsulation is carried out using a sealant to obtain an electrophoretic display.

The spliced electrophoretic display provided by the invention has better display effect.

Description of drawings

The above and other objects, features and advantages of the present invention will become more apparent from a more detailed description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals refer to the same parts throughout the drawings, and the drawings have not been intentionally drawn to scale, the emphasis being placed on illustrating the subject matter of the present invention.

1 is a schematic structural diagram of a spliced electronic paper display provided by the prior art;

2 is a schematic structural diagram of a spliced electrophoretic display provided in Embodiment 1 of the present invention;

3 is a schematic structural diagram of a spliced electrophoretic display provided in Embodiment 2 of the present invention;

4 is a schematic structural diagram of an electrophoretic display block provided by an embodiment of the present invention;

Fig. 5 is the sectional structure schematic diagram of A-A in Fig. 2;

Fig. 6 is the sectional structure schematic diagram of B-B in Fig. 3;

Detailed ways

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

2-6, an embodiment of the present invention provides a spliced electrophoretic display, which includes an upper protective layer 5, a display layer 7 and a lower protective layer 6 that are stacked and connected in sequence from top to bottom, and an edge sealing adhesive layer is arranged around the display layer 7 3. The upper end of the edge sealing adhesive layer 3 is connected to the upper protective layer 5, and the lower end is connected to the lower protective layer 6. The display layer 7 is formed by open splicing of a plurality of electrophoretic display blocks 10a, and the upper surface of the display layer 7 is between the adjacent electrophoretic display blocks 10a. There is an upper splicing area, and a lower splicing area is formed on the lower surface of the display layer 7 between adjacent electrophoretic display blocks 10a. The open splicing referred to in this embodiment refers to the splicing of two adjacent electrophoretic display blocks 10a, and there is no edge sealing glue for separating the two. For example, the adjacent electrophoretic display blocks 10a may be connected and spliced with each other without a splicing gap; or there may be a splicing gap of less than 2 mm between the adjacent electrophoretic display blocks 10a, but the splicing gap is not used to separate the adjacent electrophoretic display blocks. The edge sealing glue of the display block 10a realizes the seamless splicing of the display layers.

In this embodiment, the upper protective layer 5 covers the plurality of electrophoretic display blocks 10a and the upper splicing area between the electrophoretic display blocks 10a. To prevent water vapor from entering the interior of the display layer 7 from the upper splicing area on the upper surface of the display layer 7 , the upper protective layer 5 has a protective and sealing effect on the upper splicing area on the upper surface of the display layer 7 . In this embodiment, the upper protective layer 5 covering the plurality of electrophoretic display blocks 10a means that the upper protective layer 5 completely covers the electrophoretic display blocks 10a, and may also partially cover the micro-display areas of the plurality of electrophoretic display blocks 10a.

In this embodiment, the lower protective layer 6 covers the lower splicing area. To prevent water vapor from entering the interior of the display layer 7 from the lower splicing area on the lower surface of the display layer 7 , the lower protective layer 6 has a protective and sealing effect on the upper splicing area on the upper surface of the display layer 7 .

In this embodiment, the electrophoretic display block 10a includes a transparent conductive layer 72, an electrophoretic display layer 71 and a driving backplane 73 in order from top to bottom. The electrophoretic display layer 71 includes a plurality of display micro-units, and the display micro-units are encapsulated with electrophoretic liquid and The electrophoretic particles dispersed in the electrophoretic liquid, the transparent conductive layer 72 and the driving backplane 73 are used to apply electrical signals at both ends of the electrophoretic display layer 71 to make the electrophoretic particles move in the electrophoretic liquid. The display microunits referred to in this embodiment may be microcapsules or microcups. In this embodiment, the transparent conductive layer 72 may be an ITO film, and the driving backplane may be a TFT.

In the spliced electrophoretic display of the present embodiment, the display layer 7 is formed by open splicing of a plurality of electrophoretic display blocks 10a, and the adjacent electrophoretic display blocks 10a do not have edge sealing glue for separating the two, and the entire display layer 7 achieves a better large size. screen display effect. At the same time, under the protection of the edge sealing adhesive layer 3, the upper protective layer 5 and the lower protective layer 6, water vapor is prevented from invading from the four sides of the display layer, and water vapor is prevented from invading from the lower splicing area and the upper splicing area. Further, it has a better sealing effect on the display layer.

3, 5 and 6, in a preferred embodiment, the edges of the transparent conductive layer 72, the electrophoretic display layer 71 and the driving backplane 73 form a flush cut surface 4, that is, the transparent conductive layer 72, the electrophoretic display layer 71 The tangential plane 4 of the driving backplane 73 is vertically aligned. Adjacent electrophoretic display blocks 10a are spliced with their flush cut surfaces 4 as opposite surfaces, so as to achieve a better splicing effect.

3 , 5 and 6 , in a preferred embodiment, the material of the electrophoretic display layer 77 on the cut surface 4 is the same as the material of the middle of the electrophoretic display layer 77 , that is, the material of the electrophoretic display layer 77 on the cut surface is the same as the electrophoretic display layer 77 . The main material is the same. The display effect of the electrophoretic display layer 77 is maximized, and the large-screen display effect is better after splicing.

5 and 6 , in a preferred embodiment, the electrophoretic display layer 71 includes a conductive solid adhesive 712 and a plurality of microcapsules 711 distributed in the conductive solid adhesive 712 . A conductive solid adhesive 712 is included.

Referring to FIGS. 2 and 3 , in a preferred embodiment, the display surface of the display layer 7 includes a display area, and the opposite sides outside the display area are respectively provided with driver chips, and the driver chips are arranged in the edge sealing adhesive layer 3 or arranged in Outside the edge sealing adhesive layer 3, it is used to drive the display layer 7 to display. In this embodiment, the driving chip 92 can be disposed in the chip-on-film region 91 outside the edge sealing adhesive layer 3 , and the chip-on-film region 91 is far from the display region.

Referring to FIG. 2, in a preferred embodiment, the display layer 7 is formed by splicing multiple groups of splicing units arranged along the first direction c, and each group of splicing units is obtained by arranging two electrophoretic display blocks 10a along the second direction b, the first direction c is obtained. The driving chips 92 are arranged perpendicular to the second direction b, and the driving chips 92 are arranged on opposite sides parallel to the first direction c outside the display area to ensure that the driving chips 92 can be connected to each electrophoretic display block 10a.

2, 3 and 4, in a preferred embodiment, the display surface of the display layer 7 includes a display area, and the display surface of each electrophoretic display block 10a includes a micro-display area 101 and a micro-edge sealing area on one side of the display area 102 , the micro-display areas 101 of a plurality of electrophoretic display blocks 10a are spliced to form a display area, and a driver chip 92 is arranged in the micro-edge sealing area 102 , and the driver chip 92 is used to drive the display area of the corresponding electrophoretic display block 10a for display. The edge sealing adhesive layer 3 in this embodiment can cover the micro edge sealing area 102 of the electrophoretic display block 10a after being packaged.

Referring to FIG. 4 , in a preferred embodiment, the bottom surface of the electrophoretic display layer 71 of each electrophoretic display block 10a is provided with a plurality of sub-pixel driving electrodes and wires arranged under the plurality of sub-pixel driving electrodes, and the display area covers the corresponding plurality of sub-pixel driving electrodes The electrodes and the wires disposed under the plurality of sub-pixel driving electrodes are connected to the driving chip through wires, and the wires are used to provide scanning signals and image signals for the electrophoretic display block 10a. The wires include scan lines 103 and signal lines 104 for providing scan signals and image signals for the electrophoretic display block 10a. The bottom layer wiring design is adopted, the wiring is hidden in the display area, and the edge sealing area has no wiring design, which can realize the no wiring design at the connection of the adjacent electrophoretic display blocks 10a, and has a better large-screen display effect.

Referring to FIG. 4 , the preparation method of the driving backplane of the electrophoretic display block 10a of the present embodiment is as follows: firstly, the scan lines 103 are prepared on the substrate through a TFT process, and then an insulating layer is prepared on the scan lines 103, and then signals are prepared on the insulating layer. The line 104 and the insulating layer can isolate the scan line 103 and the signal line 104 from each other, and not interfere with each other. Then, a plurality of sub-pixel driving electrodes are fabricated again on the prepared signal line 104 through the TFT process.

In a preferred embodiment, each electrophoretic display block 10a is provided with a connecting line (not shown), the connecting line is disposed on the side of the electrophoretic display block 10a with the micro-sealed area, and the connecting line is sequentially connected to the transparent conductive layer 72, the electrophoretic Display layer 71 and driving backplane 73 . The bottom of the connection line is connected to the driving backplane 73 in the edge sealing area, the electrophoretic display layer 71 is provided with a through hole, and the other end of the connection line is connected to the transparent conductive layer 72 through the through hole.

5 , in a preferred embodiment, the upper protective layer 5 is integrally formed and covers the upper surface of the display layer 7 , and the lower protective layer 6 is integrally formed and covers the lower surface of the display layer 7 .

Referring to FIG. 6, in another preferred embodiment, the upper protective layer 5 is integrally formed and covers the upper surface of the display layer 7, the lower protective layer 6 includes a splicing protection block 22b and an edge sealing block 22a, and the splicing protection block 22b covers the lower splicing area , the edge sealing block 22a is connected with the lower end of the edge sealing glue. The edge sealing glue block 22a and the display layer 7 are fixed and sealed by the sealant 22c.

2-6, an embodiment of the present invention also provides a method for preparing a spliced electrophoretic display, including the following steps:

Form the initial electrophoretic display of the transparent conductive layer 72, the electrophoretic display layer 771 and the driving backplane 73 in order from top to bottom;

The edge of the initial electrophoretic display block is cut to make the cut surface 4 flat, and the material of the cut surface is the same as the material of the middle part of the electrophoretic display layer 71 to obtain the electrophoretic display block 10a. The three sides of the electrophoretic display block are cut, so that the spliced cut surface 4 is more flat, and the side where the chip is arranged is not cut, and the micro-sealing area 102 is retained.

A plurality of electrophoretic display blocks 10a are openly spliced to form an electrophoretic display layer 71, and adjacent electrophoretic display blocks 10a are spliced with their flush cut surfaces as opposite surfaces, so that the remaining micro-sealing areas 102 are disposed outward.

The upper protective layer 5 and the lower protective layer 6 are respectively covered above and below the display layer 7;

After covering the upper protective layer 5 and the lower protective layer 6, the surrounding area of the display layer 7 is encapsulated with a sealant to obtain a spliced electrophoretic display.

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description of the present invention, or directly or indirectly used in other related technical fields, are the same as The principles are included in the scope of patent protection of the present invention.

Claims (11)

1. a splicing electrophoretic display, it is characterized in that, from top to bottom, comprise successively the upper protective layer, the display layer and the lower protective layer that are stacked and connected, the display layer is provided with an edge-sealing glue layer around, and the edge-sealing glue layer The upper end is connected to the upper protective layer, the lower end is connected to the lower protective layer, the display layer is formed by open splicing of a plurality of electrophoretic display blocks, and an upper splicing area is provided on the upper surface of the display layer between adjacent electrophoretic display blocks, There is a lower splicing area on the lower surface of the display layer between adjacent electrophoretic display blocks, the upper protective layer covers the plurality of electrophoretic display blocks and the upper splicing area between the electrophoretic display blocks, the lower protective layer Covering the lower splicing area; the electrophoretic display block sequentially includes a transparent conductive layer, an electrophoretic display layer and a driving backplane from top to bottom, the electrophoretic display layer includes a plurality of display micro-units, and the display micro-units are packaged with The electrophoretic liquid and the electrophoretic particles dispersed in the electrophoretic liquid, the transparent conductive layer and the driving backplane are used to apply electrical signals at both ends of the electrophoretic display layer to make the electrophoretic particles move in the electrophoretic liquid. 2. The splicing electrophoretic display according to claim 1, wherein the edges of the transparent conductive layer, the electrophoretic display layer and the driving backplane form a flush section, and the flush section of the adjacent electrophoretic display block is Splicing on opposite sides. 3 . The spliced electrophoretic display according to claim 2 , wherein the material of the electrophoretic display layer at the cut surface is the same as the material of the middle of the electrophoretic display layer. 4 . 4. The spliced electrophoretic display according to claim 2, wherein the electrophoretic display layer comprises a conductive solid-state adhesive and a plurality of microcapsules distributed in the conductive solid-state adhesive, and the electrophoretic display layer comprises a conductive solid-state adhesive. The material at the cut surface includes the conductive solid adhesive. 5 . The spliced electrophoretic display according to claim 1 , wherein the display surface of the display layer comprises a display area, and opposite sides outside the display area are respectively provided with driver chips, and the driver chips are arranged on the inside the edge sealing adhesive layer, or disposed outside the edge sealing adhesive layer, for driving the display layer to display. 6. The splicing electrophoretic display according to claim 5, wherein the display layer is formed by arranging and splicing multiple groups of splicing units along the first direction, and each group of splicing units is obtained by arranging 2 electrophoretic display blocks along the second direction. , the first direction is perpendicular to the second direction, and the driving chip is disposed on opposite sides parallel to the first direction outside the display area. 7 . The spliced electrophoretic display according to claim 1 , wherein the display surface of the display layer includes a display area, and the display surface of each electrophoretic display block includes a micro-display area and a micro-seal on one side of the display area. 8 . Edge area, the display area is formed by splicing the micro display areas of a plurality of electrophoretic display blocks, and a driver chip is arranged in the micro edge sealing area, and the driver chip is used to drive the display area of the corresponding electrophoresis display block to display. 8 . The spliced electrophoretic display according to claim 7 , wherein the bottom surface of the electrophoretic display layer of each electrophoretic display block is provided with a plurality of sub-pixel driving electrodes and wires arranged under the plurality of sub-pixel driving electrodes, and the display area Covering the corresponding plurality of sub-pixel driving electrodes and wires disposed under the plurality of sub-pixel driving electrodes, the plurality of sub-pixel driving electrodes are connected to the driving chip through wires, and the wires are used to provide scanning signals and images for the electrophoretic display block Signal. 9 . The spliced electrophoretic display according to claim 7 , wherein each electrophoretic display block is provided with a connecting line, and the connecting line is disposed on a side of the electrophoretic display block with a micro-sealed area, and the The connecting wires connect the transparent conductive layer, the electrophoretic display layer and the driving backplane in sequence. 10 . The spliced electrophoretic display according to claim 1 , wherein the upper protective layer is integrally formed and covers the upper surface of the display layer, and the lower protective layer is integrally formed and covers the lower surface of the display layer 10 . ;or, The upper protective layer is integrally formed and covers the upper surface of the display layer, the lower protective layer includes a splicing protection block and an edge sealing block, the splicing protection block covers the lower splicing area, and the edge sealing block is connected with the edge sealing block. Connect the lower end of the edge sealant. 11. A preparation method of splicing electrophoretic display, is characterized in that, comprises the steps: forming an initial electrophoretic display block of a transparent conductive layer, an electrophoretic display layer and a driving backplane in sequence from top to bottom; cutting the edge of the initial electrophoretic display block to make the cut surface flat, and the material of the cut surface is the same as the material in the middle of the electrophoretic display layer, to obtain an electrophoretic display block; A plurality of electrophoretic display blocks are openly spliced to form an electrophoretic display layer, and adjacent electrophoretic display blocks are spliced with their flush cut surfaces as opposite surfaces; Cover the upper protective layer and the lower protective layer above and below the display layer respectively; After covering the upper protective layer and the lower protective layer, encapsulation is carried out using a sealant to obtain an electrophoretic display.

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