CN110320724A - A kind of block type multicolor displaying electrophoretic display apparatus - Google Patents

Abstract

A kind of block type multicolor displaying electrophoretic display apparatus; including several display units, each display unit includes substrate, driving backboard, sealant perithallium, three adjacent electrophoresis showed area, the spaced walls being set between adjacent Liang Ge electrophoresis showed area, the three transfer electrodes of side for being respectively arranged at three electrophoresis showed areas, the transparent substrate for being set to above three electrophoresis showed areas and transferring respectively with three three public electrodes that electrodes connect, be set to above public electrode, the protective film and driving chip that are set to above transparent substrate two-by-two.So that least electrophoresis particle type can be used in each display unit, particle concentration is reduced, three electrophoresis layers, which are combined with each other, realizes that the high brightness colour of multiple color is shown, and improves refresh rate.

Description

A block-type multi-color display electrophoretic display device

technical field

The invention relates to the technical field of electronic paper, in particular to a block-type multi-color display electrophoretic display device.

Background technique

The principle of a multi-color or color electrophoretic display device (Electrophoretic Display; EPD) is to display multi-color or color images by using an electric field to make charged or neutral electrophoretic particles move in a directional manner. Electrophoretic display devices are widely used in the field of transmitting static graphic information, such as e-books or electronic shelf labels. At present, the black and white display is the display device whose display performance is closest to the characteristics of paper; the electrophoretic display device has the storage property of the displayed content, and the displayed content will not disappear even if the power is not turned on. The particles of an electrophoretic display device have scattering properties. When displaying an image, particles of different colors scatter or absorb ambient light, which is the same as that of paper ink. Compared with reflective liquid crystal display devices, particle-type electrophoretic display devices are one of the display devices that can easily achieve high reflectivity in multi-color display. However, it is limited to the multi-color display of white-blue, white-yellow, black-and-white-red, black-white-yellow and other particle combinations. Although the color electrophoretic display device of the subtractive color mixing system or the additive color mixing system can also be realized, there are still many problems. The basic structure of these electrophoretic display devices is water-blocking upper protective film, OCA glue, PET film upper substrate, common electrode, electrophoretic layer, driving TFT array, glass lower substrate with TFT array or PI flexible lower substrate (PI flexible substrate usually A water-blocking lower protective film), transfer electrodes, common electrode leads, and a sealant between the filled upper protective film and the lower substrate (or lower protective film) are required. These structures are employed in black-and-white, tri-color and color displays. However, in practical applications, the three-color refresh rate is low. For color display, not only the refresh rate is low, but also the color saturation is not good.

Although the electrophoretic display device has the above-mentioned paper-like advantages and high reflectivity, it is difficult to achieve color mixing of colored particles due to the difficulty in matching between charged pigment particles, charged particles and electrophoretic fluid. The selection of pigment particles suitable for electrophoretic displays is not wide enough. Multi-color (four or more colors) or color images are not easy to realize, and performance or high cost limit the wide application of electrophoretic display devices. In the prior art, color display devices using black-and-white and subtractive color mixing systems or additive color mixing systems have high cost, low refresh rate, low color saturation of mixed colors except for the color of electrophoretic particles, and a very narrow operating temperature range. More colors can be displayed by simple splicing of multi-color display devices, but such multi-color display devices have high driving costs and poor uniformity of splicing seams and backgrounds. Taking the display of 4 colors (black, white, red, and blue) as an example, if only one electrophoretic layer is used in a display device, four kinds of particles, black, white, red, and blue, are required. In order to ensure the reflectivity, the concentration of each particle is required to be high enough.

This technical solution divides the TFT driving array used for the electrophoretic display device, each area is composed of a driving unit, and the driving unit is composed of a scanning electrode, a signal electrode, a TFT (single gate or double gate), a pixel electrode, a storage capacitor, composed of vias and insulating layers. The drive unit is connected to corresponding scan electrodes, signal electrodes, and storage capacitors through signal electrode lines, scan electrode lines, and storage electrode lines. Each TFT driving array corresponds to a complete electrophoretic layer, and the types and properties of electrophoretic particles and electrophoretic fluid in the same electrophoretic layer are the same. However, different electrophoretic particle systems are used in different areas; multiple electrophoretic layers are combined to display multi-color or color images under the action of a unified driver IC output waveform.

In summary, by using an electrophoretic layer composed of a variety of particles and designing a special TFT drive array, more colors can be displayed in the entire display device, and it can be refreshed quickly to meet the needs of multiple colors at low cost. Application scenarios.

Contents of the invention

In view of this, the present invention provides a display unit with multiple display units, each display unit has three different electrophoretic layers, and partition walls are set between different electrophoretic layers, so that each display unit can use the least amount of electrophoretic particles The particle concentration is reduced, the three electrophoretic layers are combined to realize high-brightness color display of multiple colors, and a block-type multi-color display electrophoretic display device with increased refresh rate is used to solve the above problems.

A block-type multi-color display electrophoretic display device, including several display units, each display unit includes a substrate, a driving backplane arranged on the substrate, a ring-shaped sealant surrounding layer arranged on the driving backplane, and a Three adjacent electrophoretic display areas in pairs, a partition wall arranged between two adjacent electrophoretic display areas, three transfer electrodes respectively arranged on the sides of the three electrophoretic display areas, Three common electrodes arranged above the three electrophoretic display areas and respectively connected to the three transfer electrodes, a transparent substrate arranged above the common electrodes, a protective film and a driving chip arranged above the transparent substrate; the partition walls are arranged vertically Between the driving backplane and the transparent substrate or protective film; the driving backplane includes three driving blocks corresponding to the three electrophoretic display areas, connecting leads connected between two adjacent driving blocks, and connecting three driving blocks respectively. The driving leads of the block and the driving chip, and the common leads connecting the three common electrodes and the driving chip; the three electrophoretic display areas all include an electrolytic layer at the bottom and an electrophoretic layer above the electrolytic layer, and the electrophoretic layer includes at least some first electrophoretic layers. particles and a number of second electrophoretic particles.

Further, the protective film includes two layers of PET films and an anti-ultraviolet layer, an anti-glare layer and a water-blocking layer arranged between the two layers of PET films.

Further, the three electrophoretic display areas are respectively the first electrophoretic display area, the second electrophoretic display area and the third electrophoretic display area, wherein the width of the first electrophoretic display area is equal to that of the second electrophoretic display area and the third electrophoretic display area The sum of widths, the second electrophoretic display area and the third electrophoretic display area are located on the same side of the first electrophoretic display area.

Further, the partition walls include a first partition wall disposed between the first electrophoretic display area and the second electrophoretic display area, a second partition wall disposed between the first electrophoretic display area and the third electrophoretic display area, and The third partition wall is arranged between the second electrophoretic display area and the third electrophoretic display area.

Further, the partition walls include a bottom sealing layer bonded to the driving backplane, a top sealing layer bonded to the protective film, and a pattern layer arranged between the bottom sealing layer and the top sealing layer.

Further, the partition walls include a bottom sealing layer bonded to the driving backplane, a top sealing layer bonded to the transparent substrate, and a pattern layer arranged between the bottom sealing layer and the top sealing layer.

Further, the three common electrodes are respectively the first common electrode disposed between the first electrophoretic display area and the transparent substrate, the second common electrode disposed between the second electrophoretic display area and the transparent substrate, and the second common electrode disposed between the second electrophoretic display area and the transparent substrate. The third common electrode between the three electrophoretic display areas and the transparent substrate.

Further, the three common electrodes are respectively the first common electrode disposed between the first electrophoretic display area and the transparent substrate, the second common electrode disposed between the second electrophoretic display area and the transparent substrate, and the second common electrode disposed between the second electrophoretic display area and the transparent substrate. The third common electrode between the three electrophoretic display areas and the transparent substrate.

Further, the driving block is a TFT driving array.

Further, the connection leads include several TFT data leads and gate leads.

Compared with the prior art, the block-type multi-color display electrophoretic display device of the present invention includes several display units, and each display unit includes a substrate, a driving backplane arranged on the substrate, and a ring-shaped ring arranged on the driving backplane. The sealant surrounding layer, the three electrophoretic display areas adjacent to each other in the sealant surrounding layer, the partition wall between the two adjacent electrophoretic display areas, and the side walls of the three electrophoretic display areas respectively Three transfer electrodes, three common electrodes arranged above the three electrophoretic display areas and respectively connected to the three transfer electrodes, a transparent substrate arranged above the common electrodes, a protective film and a driving chip arranged above the transparent substrate The partition wall is vertically arranged between the driving backplane and the transparent substrate or protective film; the driving backplane includes three driving blocks respectively corresponding to three electrophoretic display areas, connected to the connection between two adjacent driving blocks Leads, drive leads connecting the three drive blocks and the drive chip, and common leads connecting the three common electrodes and the drive chip; the three electrophoretic display areas include an electrolytic layer at the bottom and an electrophoretic layer above the electrolytic layer. The layer includes at least some first electrophoretic particles and some second electrophoretic particles. In this way, each display unit can use the least types of electrophoretic particles, reducing the concentration of particles, and the combination of the three electrophoretic layers can realize multi-color high-brightness color display, and improve the refresh rate.

Description of drawings

Embodiments of the present invention are described below in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic top view of a block-type multi-color display electrophoretic display device provided by the present invention.

Fig. 2 is a sectional view along line A-A in Fig. 1 .

FIG. 3 is a schematic bottom view of a block-type multi-color display electrophoretic display device provided by the present invention.

Fig. 4 is a sectional view along line B-B in Fig. 1 .

Fig. 5 is a sectional view along line C-C in Fig. 1 .

Fig. 6 is a sectional view taken along line D-D in Fig. 1 .

Detailed ways

Specific embodiments of the present invention will be described in further detail below based on the accompanying drawings. It should be understood that the description of the embodiments of the present invention here is not intended to limit the protection scope of the present invention.

In order to highlight the invention point, the entire composition structure of the display device is not listed one by one in this embodiment, and the structures well-known to those skilled in the art are ignored here, such as about the composition of the electrophoretic fluid, the color, size and charge polarity of the electrophoretic particles, and the microcup. Or microcapsule-type micro-space structure, sealing layer of electrophoretic layer or bonding glue layer, specific distribution of lead electrodes, data lines, scanning lines, test unit and TFT driving unit specific structure etc., these are not helpful for understanding the present invention. make an impact.

Please refer to FIG. 1 and FIG. 3 , the block-type multi-color display electrophoretic display device provided by the present invention includes several display units, and each display unit includes a substrate 91, a driving backplane 9 arranged on the substrate 91, and a driving backplane 9 arranged on the driving backplane. 9, the sealant surrounding layer 5 arranged in a ring, the three electrophoretic display areas adjacent to each other in the sealant surrounding layer 5, the partition wall 7 arranged between two adjacent electrophoretic display areas, respectively Three transfer electrodes electrically connected to the three electrophoretic display areas, three common electrodes arranged above the three electrophoretic display areas and respectively connected to the three transfer electrodes, a transparent substrate 11 arranged above the common electrodes, and The protective film 1 on the transparent substrate 11 .

The protective film comprises two layers of PET films (Polyester Film, PET polyester film) and an anti-ultraviolet layer, an anti-glare layer and a water-blocking layer arranged between the two layers of PET films. The anti-ultraviolet layer, anti-glare layer and water-blocking layer can be arranged sequentially from bottom to top, or can be combined arbitrarily. For example, Liguang's model is verreal38MW003D protective film.

Specifically, the three electrophoretic display areas are respectively the first electrophoretic display area 2, the second electrophoretic display area 3 and the third electrophoretic display area 4, wherein the width of the first electrophoretic display area 2 is equivalent to that of the second electrophoretic display area 3 and the third electrophoretic display area. The sum of the widths of the three electrophoretic display areas 4 , the second electrophoretic display area 3 and the third electrophoretic display area 4 are located on one side of the first electrophoretic display area 2 .

The partition wall 7 includes a first partition wall disposed between the first electrophoretic display area 2 and the second electrophoretic display area 3, a second partition wall disposed between the first electrophoretic display area 2 and the third electrophoretic display area 4, and The third partition wall is disposed between the second electrophoretic display area 3 and the third electrophoretic display area 4 .

The transfer electrodes include a first transfer electrode 61 connected to the first electrophoretic display area 2, a second transfer electrode 62 connected to the second electrophoretic display area 3, and a third transfer electrode connected to the third electrophoretic display area 4 63.

The driving backplane 9 is provided with a driving chip 8 on the outer side of the sealant enclosing layer 5 .

Please refer to FIG. 2 and FIG. 3, the three common electrodes are respectively the first common electrode 10a arranged between the first electrophoretic display area 2 and the transparent substrate 11, and the first common electrode 10a arranged between the second electrophoretic display area 3 and the transparent substrate 11. The second common electrode 10 b and the third common electrode 10 c are disposed between the third electrophoretic display area 4 and the transparent substrate 11 , and the partition wall 7 is vertically disposed between the driving backplane 9 and the transparent substrate 11 . In this embodiment, the transparent substrate 11 covers the first electrophoretic display area 2, the second electrophoretic display area 3, the third electrophoretic display area 4 and the partition wall 7 as a whole. In other embodiments, the transparent substrate 11 can also be covered by three pieces respectively The first to third transparent substrates of the first electrophoretic display area 2, the second electrophoretic display area 3, and the third electrophoretic display area 4, at this time, the partition wall 7 is vertically arranged between the driving backplane 9 and the protective film 1, and through the gap between adjacent transparent substrates.

The drive backplane 9 includes a first drive block 21 corresponding to the first electrophoretic display area 2, a second drive block 31 corresponding to the second electrophoretic display area 3, a third drive block 41 corresponding to the third electrophoretic display area 4, and connected to the second electrophoretic display area 4. Several first connection leads 23 between a drive block 21 and the second drive block 31, several second connection leads 24 connected between the first drive block 21 and the third drive block 41, connected to the second drive block 31 Several third connecting wires 33 between the third driving block 41, the first driving wires 22 connecting the first driving block 21 and the driving chip 8, the second driving wires 32 connecting the second driving block 31 and the driving chip 8, The third driving lead 42 connecting the third driving block 41 and the driving chip 8 , and the common lead connecting the three common electrodes and the driving chip 8 .

The first driving block 21 , the second driving block 31 and the third driving block 41 are all TFT driving arrays, and the TFT driving array is composed of several regularly arranged driving units.

The first connection lead 23 , the second connection lead 24 and the third connection lead 33 each include a plurality of TFT data leads and gate leads.

In this embodiment, the first common electrode 10a is connected to the driving chip 8 through the first common electrode lead 12a, and the second common electrode 10b is connected to the third common electrode 10c and connected to the driving chip 8 through the second common electrode lead 12b.

Please refer to FIG. 4, when the top of the partition wall 7 is connected to the transparent substrate 11, the partition wall 7 includes a bottom sealing layer 71 bonded to the drive backplane 9, a top sealing layer 73 bonded to the transparent substrate 11, and a top sealing layer 73 arranged at the bottom The pattern layer between the sealing layer 71 and the top sealing layer 73 . When the top of the partition wall 7 is connected to the protective film 1 , the top sealing layer 73 is directly bonded to the protective film 1 .

Please refer to FIG. 5 , the first transfer electrode 61 , the second transfer electrode 62 and the third transfer electrode 63 are respectively located on one side of the first electrophoretic display area 2 , the second electrophoretic display area 3 and the third electrophoretic display area 4 , the top of the transfer electrode is connected to the corresponding common electrode, and the bottom is connected to the common electrode lead attached to the driving backplane.

Please refer to FIG. 6, the first electrophoretic display area 2, the second electrophoretic display area 3 and the third electrophoretic display area 4 all include an electrolytic layer 53 at the bottom and an electrophoretic layer 50 above the electrolytic layer 53. The electrophoretic layer 50 includes at least several The first electrophoretic particle 51 and the second electrophoretic particle 52 . The electrophoretic particles in the electrophoretic layer 50 of the first electrophoretic display area 2 , the second electrophoretic display area 3 and the third electrophoretic display area 4 are different, thereby displaying different unit colors. The three electrophoretic display areas are combined with each other, so that three different unit colors form different colors.

In this embodiment, the first electrophoretic display area 2 adopts the electrophoretic layer (black, white, red) of E4.1E model of EINK company, and the second electrophoretic display area 3 adopts the electrophoretic layer (blue, white) ), the third electrophoretic display area 4 adopts the electrophoretic layer (green, white) whose model is 0703-710K0005, or the electrophoretic layer of other colors. The first electrophoretic display area 2, the second electrophoretic display area 3 and the third electrophoretic display area 4 can also be 0703-710K0001 (black, white), 0703-710K0003 (light blue, white), 0703-710K0004 (red, white) , 0703-710K0006 (yellow, white) and 0703-710K0007 (brown, white) and other types of electrophoretic layers.

In the area of the transfer electrode, the electrophoretic layer 50 and the electrolytic layer 53 need to be removed, and only the substrate and the common electrode remain. First cut using a laser, then cleaned with a solvent, the transfer electrode material is then printed, inkjet or otherwise conveniently and precisely placed in the selected location.

The sealant enclosing layer 5 can adopt conventional sealant.

The first transfer electrode 61 , the second transfer electrode 62 and the third transfer electrode 63 are all made of silver dispensing glue (XA-220MV).

The driver chip 8 adopts a driver chip whose model is SSD1619AZ.

The driving backplane 9 adopts a-Si TFT to drive the backplane.

The first common electrode 10 a , the second common electrode 10 b and the third common electrode 10 c are all transparent ITO electrodes, or PEDOT/PSS, silver nanowires and the like.

The transparent substrate 11 is a PET film with a film thickness of 100 microns.

Please refer to Figure 3, the common electrodes in each area are arranged according to a certain path and connected to the transfer electrodes. Holes, ITO leads.

The bottom sealing layer 71 and the top sealing layer 73 of the partition wall 7 can use conventional sealants; the pattern layer is set in black, white or other colors by printing, inkjet, photolithography and other methods.

Compared with the prior art, the block-type multi-color display electrophoretic display device of the present invention includes several display units, and each display unit includes a substrate 91, a driving backplane 9 arranged on the substrate 91, and a driving backplane 9 arranged on the driving backplane 9. And the ring-shaped sealant surrounding layer 5, the three electrophoretic display areas adjacent to each other in the sealant surrounding layer 5, and the partition wall 7 arranged between the adjacent two electrophoretic display areas are respectively arranged on three Three transfer electrodes on the sides of each electrophoretic display area, three common electrodes arranged above the three electrophoretic display areas and respectively connected to the three transfer electrodes, a transparent substrate 11 arranged above the common electrodes, arranged on the transparent The protective film 1 and the driving chip 8 above the substrate 11; the partition wall 7 is vertically arranged between the driving backplane 9 and the transparent substrate 11 or the protective film 1; the driving backplane 9 includes a first electrode corresponding to the first electrophoretic display area 2 The driving block 21, the second driving block 31 corresponding to the second electrophoretic display area 3, the third driving block 41 corresponding to the third electrophoretic display area 4, and several first driving blocks 21 and 31 connected between the second driving block 31 A connection lead 23, several second connection leads 24 connected between the first drive block 21 and the third drive block 41, several third connection leads 33 connected between the second drive block 31 and the third drive block 41 , the first driving wire 22 connecting the first driving block 21 and the driving chip 8, the second driving wire 32 connecting the second driving block 31 and the driving chip 8, the third driving wire connecting the third driving block 41 and the driving chip 8 42 and the common leads connecting the three common electrodes and the driver chip 8; the first electrophoretic display area 2, the second electrophoretic display area 3 and the third electrophoretic display area 4 all include an electrolytic layer 53 at the bottom and an electrolytic layer above the electrolytic layer 53. The electrophoretic layer 50 includes at least a plurality of first electrophoretic particles 51 and second electrophoretic particles 52 . Take displaying 4 colors (black, white, red and blue) as an example, if we use 2 different electrophoretic layers, one electrophoretic layer has two kinds of white and blue particles, and the other electrophoretic layer has three kinds of particles, black, white and red. Therefore, reducing particle types can reduce particle concentration. Of course, the disadvantage of this method is that the four colors cannot be displayed at any position. Since the area where each color is located in the picture of the multi-color electronic paper is predetermined, displaying a predetermined color at a predetermined position has high practical value. Due to the reduced particle concentration, the refresh rate can be effectively improved. In this way, each display unit can use the least types of electrophoretic particles, reducing particle concentration, and the combination of the three electrophoretic layers realizes multi-color high-brightness color display, and improves the refresh rate.

The above are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement or improvement within the spirit of the present invention is covered by the claims of the present invention.

Claims (10)

1. a kind of block type multicolor displaying electrophoretic display apparatus, it is characterised in that: including several display units, each display unit Including substrate, the driving backboard being set on substrate, be set to driving backboard on and annular setting sealant perithallium, be located at it is close Three in sealing perithallium two-by-two adjacent electrophoresis showed area, be set between adjacent Liang Ge electrophoresis showed area spaced walls, Above being respectively arranged at three transfer electrodes of the side in three electrophoresis showed areas, being set to three electrophoresis showed areas and respectively with Three public electrodes of three transfer electrode connections, are set on transparent substrate the transparent substrate being set to above public electrode The protective film and driving chip of side；Spaced walls are vertically provided between driving backboard and transparent substrate or protective film；Driving back Plate includes that three drive blocks for respectively corresponding three electrophoresis showed areas, the connection being connected between two adjacent drive blocks are drawn Line, the driving lead for being separately connected three drive blocks and driving chip, and the public affairs of connection three public electrodes and driving chip Lead altogether；Three electrophoresis showed areas include the electrolyte layers positioned at bottom and the electrophoresis layer above electrolyte layers, electrophoresis layer packet Include at least several first electrophoresis particles and several second electrophoresis particles.

2. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: the protective film includes two Layer PET film and ultraviolet resistant layer, antiglare layer and the water blocking layer being set between two layers of PET film.

3. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: three electrophoresis showeds Area is respectively the first electrophoresis showed area, the second electrophoresis showed area and third electrophoresis showed area, wherein the width in the first electrophoresis showed area Degree is equal to the sum of the width in the second electrophoresis showed area and third electrophoresis showed area, the second electrophoresis showed area and third electrophoresis showed area It is respectively positioned on the same side in the first electrophoresis showed area.

4. block type multicolor displaying electrophoretic display apparatus as claimed in claim 3, it is characterised in that: the spaced walls include setting The first spaced walls for being placed between the first electrophoresis showed area and the second electrophoresis showed area are set to the first electrophoresis showed area and third Between the second spaced walls between electrophoresis showed area and the third being set between the second electrophoresis showed area and third electrophoresis showed area Next door.

5. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: the spaced walls include with Driving backboard bonding sealed bottom layer, the top sealant Nian Jie with protective film and be set to sealed bottom layer and top sealing Pattern layer between layer.

6. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: the spaced walls include with The sealed bottom layer of driving backboard bonding, the top sealant Nian Jie with transparent substrate and it is set to sealed bottom layer and top is close Pattern layer between sealing.

7. block type multicolor displaying electrophoretic display apparatus as claimed in claim 3, it is characterised in that: three public electrodes Respectively be set to the first public electrode between the first electrophoresis showed area and transparent substrate, be set to the second electrophoresis showed area with The second public electrode between transparent substrate and the third public electrode being set between third electrophoresis showed area and transparent substrate.

8. block type multicolor displaying electrophoretic display apparatus as claimed in claim 7, it is characterised in that: first public electrode It is connect by one first public electrode lead with driving chip, the second public electrode connect with third public electrode and by second Public electrode lead is connect with driving chip.

9. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: the drive block is TFT Drive array.

10. block type multicolor displaying electrophoretic display apparatus as described in claim 1, it is characterised in that: the connecting lead wire packet Include several TFT data leads and grid lead.