TWI815507B - E-paper display device - Google Patents

Abstract

The present invention discloses an e-paper display device, includes a driving substrate, an e-paper film, at least one scan driving circuit and a light-shielding layer. The driving substrate has a substrate and a plurality of pixel units, and the pixel units are disposed on a surface of the substrate. The e-paper film is disposed on the driving substrate, and the e-paper film covers the pixel units in a normal direction of the substrate. The scan driving circuit is disposed on the surface of the substrate and is electrically connected with the pixel units. The light-shielding layer is disposed on the scan driving circuit; wherein, the light-shielding layer and the scan driving circuit are fabricated by the same thin-film manufacturing process, and the light-shielding layer covers the scan driving circuit in the normal direction of the substrate.

Description

Electronic paper display device

The invention relates to a bistable electronic paper display device.

Faced with the increasing demand for efficient processing and storage of huge amounts of data, computers are now relied upon to process and present images through flat-panel display devices. However, the size and weight of conventional flat display devices are not as good as the advantages of easy portability and convenient reading brought by recording information on paper printed matter. Therefore, in order to maintain the portability and readability of paper while also having the efficiency and environmental friendliness of electronic products in processing data, electronic paper display devices (Electronic Paper Display, EPD) using electrophoretic materials were born.

In the manufacturing technology of electronic paper display devices, the technology of manufacturing the scan driver circuit on the glass substrate using a thin film transistor process to save the cost of the scan driver IC is referred to as GOA (Gate on array) or GOP (Gate on panel) technology. However, if the scan drive circuit is fabricated on a glass substrate using GOA or GOP technology, the drive elements disposed in the GOA or GOP area will generate leakage current due to the irradiation of external ambient light, causing the scan drive circuit to fail and rendering the electronic paper inoperable. normal operation.

The existing improvement method is to manually paste a layer of light-shielding tape on the GOA or GOP area to prevent ambient light from shining on the components of the scan drive circuit. However, applying light-shielding tape manually is not only inefficient, but also increases manufacturing costs.

In view of the above, the purpose of the present invention is to provide an electronic paper display device that is different from the existing method and can solve the problem of the scan driving circuit in the GOA (or GOP) area being ineffective due to external ambient light irradiation.

To achieve the above object, an electronic paper display device according to the present invention includes a driving substrate, an electronic paper film, at least one scan driving circuit and a light-shielding layer. The driving substrate has a substrate and a plurality of pixel units, and the pixel units are arranged on one surface of the substrate. The electronic paper film is disposed on the driving substrate, and the electronic paper film covers the pixel units in a normal direction of the substrate. The scan driving circuit is disposed on the surface of the substrate and is electrically connected to the pixel units. The light-shielding layer is disposed on the scan driving circuit; the light-shielding layer and the scanning driving circuit are made with the same thin film process, and the light-shielding layer covers the scanning driving circuit in the normal direction of the substrate.

To achieve the above object, an electronic paper display device according to the present invention includes a driving substrate, an electronic paper film, at least one scan driving circuit and a light-shielding adhesive layer. The driving substrate has a substrate and a plurality of pixel units, and the pixel units are arranged on one surface of the substrate. The electronic paper film is arranged on the driving substrate. The scan driving circuit is disposed on the surface of the substrate and is electrically connected to the pixel units. The light-shielding adhesive layer is disposed between the electronic paper film and the drive substrate; the electronic paper film is attached to the drive substrate through the light-shielding adhesive layer, and in one normal direction of the substrate, the light-shielding adhesive layer covers the scanning drive circuit and the pictures. element unit.

In one embodiment, the electronic paper film is microcapsule electronic paper, microcup electronic paper, or cholesteric liquid crystal electronic paper.

In one embodiment, the scan driving circuit includes a plurality of driving elements, and the driving elements are electrically connected to the pixel units through a plurality of scanning lines.

In one embodiment, the electronic paper display device further includes at least one data driving circuit, which is disposed on the surface of the substrate. The at least one data driving circuit is electrically connected to the pixel units through a plurality of data lines.

In one embodiment, the number of the at least one scan driving circuit is two, and the scanning driving circuits are located on two opposite sides of the substrate.

In one embodiment, the light-shielding layer is a metal layer or a resin layer.

In one embodiment, the at least one scan driving circuit is fabricated on the substrate using a thin film process.

In one embodiment, the thin film process is amorphous silicon, low-temperature polycrystalline silicon, high-temperature polycrystalline silicon, low-temperature polycrystalline oxide, or an indium gallium zinc oxide semiconductor process.

In one embodiment, the optical density of the light-shielding adhesive layer is greater than or equal to 1.

As mentioned above, in the electronic paper display device of the present invention, the electronic paper film is disposed on the drive substrate, and the electronic paper film covers the pixel units in the normal direction of the substrate, and the scan drive circuit is disposed on the substrate. surface, and is electrically connected to the pixel units, and the light-shielding layer is disposed on the scan drive circuit; the light-shielding layer and the scan drive circuit are made with the same thin film process, and in the normal direction of the substrate, the light-shielding layer covers the scan The driving circuit; or, it is arranged on the driving substrate through the electronic paper film, the scanning driving circuit is arranged on the surface of the substrate and is electrically connected to the pixel units, and the light-shielding adhesive layer is arranged between the electronic paper film and the driving substrate; Among them, the electronic paper film is attached to the drive substrate through a light-shielding adhesive layer, and in the normal direction of the substrate, the light-shielding adhesive layer covers the scanning drive circuit and the design of these pixel units. Compared with the conventional technology, which uses artificial In terms of the method of attaching light-shielding tape, the present invention provides an electronic paper display device that is different from the existing method, and can solve the problem of the scanning drive circuit in the GOA (or GOP) area being ineffective due to external ambient light, and thereby avoid Display device not functioning properly.

1,1a,2: Electronic paper display device

11,21:Driver board

111,122,211,222:Substrate

112,212: pixel unit

12,22: Electronic paper film

121,221: Containment structure

123,223: Common electrode layer

13,13a,13b,23: Scan driver circuit

131,231: Drive components

14:Light shielding layer

15,25: Data drive circuit

16:Adhesive layer

24:Light-shielding adhesive layer

C: charged particles

DL: data line

L: dielectric solution

N: normal

S1: Surface

SL: scan line

FIG. 1A is a schematic configuration diagram of an electronic paper display device according to an embodiment of the present invention.

FIG. 1B is a schematic cross-sectional view of the electronic paper display device of FIG. 1A.

FIG. 2A is a schematic configuration diagram of an electronic paper display device according to another embodiment of the present invention.

FIG. 2B is a schematic cross-sectional view of the electronic paper display device of FIG. 2A.

FIG. 3A is a schematic configuration diagram of an electronic paper display device according to another embodiment of the present invention.

FIG. 3B is a schematic cross-sectional view of the electronic paper display device of FIG. 3A.

The electronic paper display device according to some embodiments of the present invention will be described below with reference to the relevant drawings, in which the same components will be described with the same reference symbols. The drawings of the embodiments of the present invention are only schematic and do not represent the actual sizes and proportions.

FIG. 1A is a schematic configuration diagram of an electronic paper display device according to an embodiment of the present invention, and FIG. 1B is a schematic cross-sectional view of the electronic paper display device of FIG. 1A . Here, the light shielding layer 14 is not shown in FIG. 1A .

Referring to FIGS. 1A and 1B , the electronic paper display device 1 includes a driving substrate 11 , an electronic paper film 12 , at least one scan driving circuit 13 and a light-shielding layer 14 .

The driving substrate 11 can control the electronic paper film 12 to display images. The driving substrate 11 has a substrate 111 and a plurality of pixel units 112, and the pixel units 112 are disposed on the surface S1 of the substrate 111. In some embodiments, each pixel unit 112 may include at least one switch and a pixel electrode. The switch may be a thin film transistor (TFT), for example, so that the driving substrate 11 may be an active matrix (Active Matrix) driven thin film transistor. The substrate (driving backplane) controls whether the electric field of each pixel unit 112 is formed or not. The base material of the substrate 111 can be changed according to product requirements. Here, the substrate 111 may be a flexible substrate or an inflexible substrate, and may be a glass substrate, a plastic substrate, or a soft substrate. The material of the soft substrate may be, for example, but not limited to, polyimide ( Polyimide (PI) or polyethylene terephthalate (PET). The pixel units 112 of this embodiment can be fabricated on the surface S1 of the substrate 111 using a thin film (transistor) process, for example.

The electronic paper film 12 is disposed on the driving substrate 11 , and the electronic paper film 12 covers the pixel units 112 in the direction of a normal line N ( FIG. 1B ) of the substrate 111 . Among them, the electronic paper film 12 is a bistable electronic paper display film, so it has the advantages of power saving and wide viewing angle. It can be a microcapsule type electronic paper, a microcup type electronic paper, or a cholesterol-based electronic paper. Liquid crystal (Cholesteric Liquid Crystal) electronic paper, but it is not limited to this. In some embodiments, when the electronic paper film 12 is a microcapsule type or a microcup type electronic paper, the display medium may include electrophoretic substances. The electrophoretic substances include a plurality of charged light-colored pigment particles and a dark-colored dielectric solution. The pigment particles and medium solution are respectively contained in a plurality of microcapsules, and the microcapsules can be combined together using an adhesive; alternatively, the content of the electrophoretic substance can also be a combination of dark pigment particles and light-colored medium solution; Alternatively, the content of the electrophoretic substance may also be a combination of pigment particles of various colors and a light-colored medium solution.

The electronic paper film 12 of this embodiment includes a volatile display material. The non-volatile display material is an electrophoretic substance, such as a plurality of charged particles (Charged Particles) C and a dielectric solution L. In this embodiment, the electronic paper film 12 includes a containing structure 121, and the containing structure 121 may have a plurality of micro-cups or a plurality of microcapsules. The accommodation structure 121 of this embodiment has a plurality of microcups as an example, and the charged particles C are suspended in the dielectric solution L, and the charged particles C and the dielectric solution L are both accommodated in the microcups. within.

The electronic paper film 12 of this embodiment may further include a substrate 122 and a common electrode layer 123. The accommodating structure 121 is located between the substrate 122 and the driving substrate 11 . The substrate 122 can be a flexible substrate or an inflexible substrate, and can be a glass substrate, a plastic substrate, or a soft substrate. The material of the substrate 122 can be the same as or different from the material of the substrate 111 , and is not limited thereto. The common electrode layer 123 is a transparent electrode layer, which is sandwiched between the accommodating structure 121 and the substrate 122 and is disposed relative to the pixel units 112 of the driving substrate 11 . The material of the common electrode layer 123 may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO) or zinc oxide (ZnO), etc., and is not limited thereto. .

In addition, the electronic paper display device 1 may further include an adhesive layer 16 located between the electronic paper film 12 and the driving substrate 21 . The adhesive layer 16 is used to adhere the electronic paper film 12 to the driving substrate 21 so that the electronic paper film 12 can completely cover the pixel units 112 in the normal N direction of the substrate 111 . Therefore, when a voltage difference is applied between the pixel electrode of at least one pixel unit 112 and the common electrode layer 123 to generate an electric field, the charged particles C in the accommodating structure 121 can be driven to move and reflect ambient light to appear. The charged particles C or the color of the dielectric solution L are used to display images.

The number of scan driving circuits in this embodiment is one. The scan driving circuit 13 is disposed on the surface S1 of the substrate 111 and is electrically connected to the pixel units 112 . The scan driver circuit 13 of this embodiment is fabricated on the surface S1 of the substrate 111 using a thin film (transistor) process, so it is also called a GOA (Gate on array) or GOP (Gate on panel) circuit. In this way, the driver IC can be saved. cost, thereby reducing the cost of the display device. As shown in FIG. 1A , the scan driving circuit 13 includes a plurality of driving elements 131 , and the driving elements 131 are electrically connected to the pixel units 112 via a plurality of scanning lines SL. In addition, the electronic paper display device 1 of this embodiment may further include at least one data driving circuit 15. The data driving circuit 15 is disposed on the surface S1 of the substrate 111, and the data driving circuit 15 can communicate with the pictures through a plurality of data lines DL. The element unit 112 is electrically connected. Here, the number of data driving circuits 15 is one, but it is not limited thereto. Depending on the size of the display device, more than one (for example, two or four) data driving circuits may be provided. In some embodiments, the data driving circuit 15 may include a driving integrated circuit (driving IC), which may be disposed on the surface S1 of the substrate 111 through, for example, a chip on glass (COG) method.

Therefore, when the driving element 131 of the scan driving circuit 13 sequentially transmits the scanning signals and transmits them to the pixel units 112 through the scanning lines SL, the corresponding switches (such as TFTs) of the pixel units 112 in each column can be respectively enabled. is turned on, at this time the data driving circuit 15 can convert the data corresponding to each row of pixel units 112 The signal is transmitted to the pixel electrodes of the corresponding pixel units 112 through the data lines DL, so that an electric field can be generated between the pixel electrodes of the pixel units 112 and the common electrode layer 123 to display an image.

The light-shielding layer 14 is disposed on at least one scan driving circuit 13 . The light-shielding layer 14 and the scan driving circuit 13 can be produced using the same thin film process, and the light-shielding layer 14 covers the scanning driving circuit 13 in the normal N direction of the substrate 111 . Specifically, since the scan driving circuit 13 is manufactured using a thin film process, the light-shielding layer 14 can be made using the same thin film process when forming the scanning driving circuit 13, and covers the scanning driving circuit 13 (driving element 131). This absorption of light irradiated to the GOA (or GOP) area prevents the failure of the driving element 131 of the scan driving circuit 13 and thereby avoids the problem that the electronic paper display device 1 cannot operate normally. The aforementioned thin film (transistor) manufacturing process can be amorphous silicon (a-Si), low temperature polycrystalline silicon (LTPS), high temperature polycrystalline silicon (HTPS), low temperature polycrystalline oxide (LTPO) or indium gallium zinc oxide (IGZO) and other semiconductors The manufacturing process is not limited.

In some embodiments, the light-shielding layer 14 may be a metal layer made of the same metal material used to manufacture the drain electrode or source electrode of the thin film transistor during the thin film manufacturing process. Therefore, the light shielding layer 14 can share a photomask with the thin film transistor manufacturing process of the driving substrate 11, and the manufacturing cost will not increase. In some embodiments, the light-shielding layer 14 may also be an opaque resin layer.

In addition, FIG. 2A is a schematic configuration diagram of an electronic paper display device according to another embodiment of the present invention, and FIG. 2B is a schematic cross-sectional view of the electronic paper display device of FIG. 2A . Here, the light-shielding layer 14 is not shown in FIG. 2A .

As shown in FIGS. 2A and 2B , the electronic paper display device 1 a of this embodiment is substantially the same as the electronic paper display device 1 of the previous embodiment in terms of component composition and connection relationship of each component. The difference is that in the electronic paper display device 1a of this embodiment, the number of scan driving circuits is two. Among them, the scan driving circuits 13a and 13b are located outside the electronic paper film 12, and each includes a plurality of driving elements 131. The driving elements 131 are electrically connected to the pixel units 112 of the driving substrate 11 through the scanning lines SL. connection. The scan driving circuits 13a and 13b of this embodiment are respectively located on two opposite sides of the substrate 111, making the electronic paper display device 1a an electronic paper display device that can be driven bilaterally. In addition, the light-shielding layer 14 is disposed on the two scan driving circuits 13a and 13b; the light-shielding layer 14 and the scanning driving circuits 13a and 13b are still made with the same thin film process, and in the normal N direction of the substrate 111, the light-shielding layer 14 also covers the scanning Driving circuits 13a, 13b.

In addition, FIG. 3A is a schematic configuration diagram of an electronic paper display device according to another embodiment of the present invention, and FIG. 3B is a schematic cross-sectional view of the electronic paper display device of FIG. 3A . Here, the light-shielding adhesive layer 24 is not shown in FIG. 3A .

As shown in FIGS. 3A and 3B , the electronic paper display device 2 of this embodiment includes a driving substrate 21 , an electronic paper film 22 , at least one scan driving circuit 23 and a light-shielding adhesive layer 24 .

The driving substrate 21 can control the electronic paper film 22 to display images. The driving substrate 21 has a substrate 211 and a plurality of pixel units 212, and the pixel units 212 are disposed on the surface S1 of the substrate 211. In some embodiments, each pixel unit 212 may include at least one switch and a pixel electrode. The switch may be a thin film transistor (TFT), for example, so that the driving substrate 21 may be an active matrix (Active Matrix) driven thin film transistor. The substrate is used to control whether the electric field of each pixel unit 212 is formed. The base material of the substrate 211 can be changed according to product requirements. Here, the substrate 211 may be a flexible substrate or an inflexible substrate, and may be a glass substrate, a plastic substrate, or a soft substrate. The material of the soft substrate may be, for example, but not limited to, polyimide (PI) or Polyethylene terephthalate (PET). The pixel units 212 in this embodiment can be fabricated on the surface S1 of the substrate 211 using a thin film (transistor) process, for example.

The electronic paper film 22 is provided on the driving substrate 21 . The electronic paper film 22 covers at least the pixel units 212 in the direction of the normal line N (FIG. 3B) of the substrate 211. The electronic paper film 22 is a bistable electronic paper display film, so it has the advantages of power saving characteristics and wide viewing angle. It can be a microcapsule type electronic paper, a microcup type electronic paper, or a cholesterol liquid crystal ( Cholesteric Liquid Crystal) electronic paper, but it is not limited to this. In some embodiments, when the electronic paper film 22 is a microcapsule type or a microcup type electronic paper, the display medium may include electrophoretic substances. The electrophoretic substances include a plurality of charged light-colored pigment particles and a dark-colored dielectric solution. The pigment particles and medium solution are respectively contained in a plurality of microcapsules, and the microcapsules can be combined together using an adhesive; alternatively, the content of the electrophoretic substance can also be a combination of dark pigment particles and light-colored medium solution; Alternatively, the content of the electrophoretic substance may also be a combination of pigment particles of various colors and a light-colored medium solution.

The electronic paper film 22 of this embodiment includes a volatile display material. The non-volatile display material is an electrophoretic substance, such as a plurality of charged particles C and a dielectric solution L. In this embodiment, the electronic paper film 22 includes a containing structure 221, and the containing structure 221 may have a plurality of microcups or a plurality of microcapsules. Book The accommodation structure 221 of the embodiment has a plurality of microcups as an example, and the charged particles C are suspended in the dielectric solution L, and the charged particles C and the dielectric solution L are both accommodated in the microcups. .

The electronic paper film 22 of this embodiment may further include a substrate 222 and a common electrode layer 223. The accommodating structure 221 is located between the substrate 222 and the driving substrate 21 . The substrate 222 may be a flexible substrate or an inflexible substrate, and may include a glass substrate, a plastic substrate, or a soft substrate. The material of the substrate 222 may be the same as or different from the material of the substrate 211 and is not limited thereto. The common electrode layer 223 is a transparent electrode layer, which is disposed between the accommodating structure 221 and the substrate 222 and is disposed relative to the pixel units 212 of the driving substrate 21 . The material of the common electrode layer 223 may be, for example, indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide (AZO), gallium zinc oxide (GZO) or zinc oxide (ZnO), etc., and is not limited thereto. . Therefore, when a voltage difference is applied between the pixel electrode of at least one pixel unit 212 and the common electrode layer 223 to generate an electric field, the charged particles C in the accommodating structure 221 can be driven to move and reflect ambient light to appear. The charged particles C or the color of the dielectric solution L enable the electronic paper display device 2 to display images.

The number of scan driving circuits in this embodiment is one. The scan driving circuit 23 is disposed on the surface S1 of the substrate 211 and is electrically connected to the pixel units 212 . In this embodiment, the scan driver circuit 23 is fabricated on the surface S1 of the substrate 211 using a thin film (transistor) process, and is therefore also called a GOA or GOP circuit. In this way, the cost of the driver IC can be saved, thereby reducing the cost of electronic paper. Display device 2 cost. The scan driving circuit 23 of this embodiment includes a plurality of driving elements 231, and the driving elements 231 are electrically connected to the pixel units 212 through a plurality of scanning lines SL. In some embodiments, the number of scan driving circuits may be 2, which may be located outside the electronic paper film 12 and each include a plurality of driving elements 131. The driving elements 131 may communicate with the driving substrate via the scanning lines SL. The pixel units 212 of 21 are electrically connected. In some embodiments, the two scan driving circuits can be located on two opposite sides of the substrate 211, making the electronic paper display device a display device that can be driven on both sides.

The electronic paper display device 2 of this embodiment may further include at least one data driving circuit 25. The data driving circuit 25 is disposed on the surface S1 of the substrate 211, and the data driving circuit 25 can communicate with the pixel units 212 through a plurality of data lines DL. Electrical connection. The number of data driving circuits 25 in this embodiment is one, but it is not limited thereto. Depending on the size of the electronic paper display device, more than one (for example, two or four) data driving circuits may be provided. In some embodiments, the data driving circuit 25 may include a driving integrated circuit (driving IC), which may be disposed on the surface S1 of the substrate 211 through a glass flip-chip method, for example.

Therefore, when the driving element 231 of the scan driving circuit 23 sequentially transmits the scanning signals and transmits them to the pixel units 212 through the scanning lines SL, the corresponding switches (such as TFTs) of the pixel units 212 in each column can be respectively enabled. is turned on, and the data driving circuit 25 can transmit the data signals corresponding to each row of pixel units 212 to the corresponding pixel electrodes of the corresponding pixel units 212 through the data lines DL, so that the pixel electrodes of the pixel units 212 An electric field can be generated between the common electrode layer 223 and the common electrode layer 223 to display an image.

In addition, the light-shielding adhesive layer 24 is disposed between the electronic paper film 22 and the driving substrate 21 . The electronic paper film 22 is attached to the drive substrate 21 through a light-shielding adhesive layer 24, and the light-shielding adhesive layer 24 covers at least one scan driving circuit 23 and the pixel units 212 in the normal N direction of the substrate 211. Specifically, in order to absorb the light irradiated to the GOA (or GOP) area and avoid the failure of the driving element 231 of the scanning driving circuit 23, the light-shielding adhesive layer 24 of this embodiment has the same width as the electronic paper film 22, and the electronic paper film 22 And the width of the light-shielding adhesive layer 24 is larger than the width of the pixel units 212. With the larger-sized light-shielding adhesive layer 24 (and the electronic paper film 22), the scan driving circuit 23 can be covered in the normal N direction of the substrate 211. (and these pixel units 212) to prevent external ambient light from irradiating the GOA (or GOP) area, thus avoiding the problem that the scan driving circuit 23 fails and the electronic paper display device 2 cannot operate normally. In different embodiments, the width of the light-shielding adhesive layer 24 can be greater than the width of the electronic paper film 22 , as long as the light-shielding adhesive layer 24 can cover the scan driving circuit 23 in the direction of the normal N of the substrate 211 , the invention is not limited thereto. . The aforementioned "width" refers to the width parallel to the surface S1 of the substrate 211, or the width perpendicular to the normal line N direction.

In some embodiments, the light-shielding adhesive layer 24 may be a light-shielding adhesive layer of non-metallic material, which in addition to having an adhesive function, also has a light-shielding effect. In some embodiments, the optical density (OD) of the light-shielding adhesive layer 24 may be greater than or equal to 1. In some embodiments, the optical density (OD) of the light-shielding adhesive layer 24 may be greater than or equal to 1 and less than or equal to 5 (1≦OD≦5), for example, 1, 1.2, 2.3, 3.4, 4.2, 5 and so on, or whatever.

To sum up, in the electronic paper display device of the present invention, the electronic paper film is disposed on the drive substrate, and the electronic paper film covers the pixel units in the normal direction of the substrate, and the scan drive circuit is disposed on the substrate. surface, and is electrically connected to the pixel units, and the light-shielding layer is disposed on the scan drive circuit; the light-shielding layer and the scan drive circuit are made with the same thin film process, and in the normal direction of the substrate, the light-shielding layer covers the scan The driving circuit; or, it is arranged on the driving substrate through the electronic paper film, the scanning driving circuit is arranged on the surface of the substrate and is electrically connected to the pixel units, and the light-shielding adhesive layer is arranged on the electronic paper. film and the driving substrate; among them, the electronic paper film is attached to the driving substrate through a light-shielding adhesive layer, and in the normal direction of the substrate, the light-shielding adhesive layer covers the scanning drive circuit and the design of these pixel units. Compared with In the conventional technology, the manual method of attaching light-shielding tape is used. The present invention provides an electronic paper display device that is different from the existing method, and can solve the problem of the scanning drive circuit of the GOA (or GOP) area caused by external ambient light. failure problem, thereby avoiding the problem of the display device not functioning properly.

The above is only illustrative and not restrictive. Any equivalent modifications or changes that do not depart from the spirit and scope of the present invention shall be included in the appended patent scope.

1: Electronic paper display device

11:Driver substrate

111,122:Substrate

112: Pixel unit

12: Electronic paper film

121: Containment structure

123: Common electrode layer

13:Scan driver circuit

14:Light shielding layer

16:Adhesive layer

C: charged particles

L: dielectric solution

N: normal

S1: surface

Claims (9)

An electronic paper display device includes: a driving substrate having a substrate and a plurality of pixel units, the pixel units being arranged on a surface of the substrate; an electronic paper film being arranged on the driving substrate; at least one scanning A driving circuit is disposed on the surface of the substrate and is electrically connected to the pixel units; and a light-shielding adhesive layer is disposed between the electronic paper film and the driving substrate; wherein the electronic paper film passes through the light-shielding adhesive layer. The adhesive layer is attached to the driving substrate, and in a normal direction of the substrate, the light-shielding adhesive layer covers the at least one scan driving circuit and the pixel units. The electronic paper display device of claim 1, wherein the electronic paper film is microcapsule electronic paper, microcup electronic paper, or cholesteric liquid crystal electronic paper. The electronic paper display device of claim 1, wherein the scan driving circuit includes a plurality of driving elements, and the driving elements are electrically connected to the pixel units via a plurality of scanning lines. The electronic paper display device of claim 1 further includes: at least one data driving circuit disposed on the surface of the substrate, and the at least one data driving circuit is electrically connected to the pixel units through a plurality of data lines. The electronic paper display device according to claim 1, wherein the number of the at least one scan driving circuit is 2, and the scanning driving circuits are located on two opposite sides of the substrate. The electronic paper display device according to claim 1, wherein the light-shielding adhesive layer has the same width as the electronic paper film. The electronic paper display device of claim 1, wherein the at least one scan driving circuit is fabricated on the substrate using a thin film process. The electronic paper display device according to claim 7, wherein the thin film process is amorphous silicon, low-temperature polycrystalline silicon, high-temperature polycrystalline silicon, low-temperature polycrystalline oxide or indium gallium zinc oxide semiconductor process. The electronic paper display device according to claim 1, wherein the optical density of the light-shielding adhesive layer is greater than or equal to 1.

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