ELECTROPHORETIC DISPLAY DEVICE

An electrophoretic display device including a first stretchable material layer, a first stretchable electrode layer, a stretchable electrophoretic display medium layer, multiple second stretchable electrode layers, an insulation layer, and a third stretchable electrode layer. The first stretchable electrode layer is disposed on the first stretchable material layer. The stretchable electrophoretic display medium layer is disposed on the first stretchable electrode layer. The second stretchable electrode layers are separately disposed on the stretchable electrophoretic display medium layer, so that the stretchable electrophoretic display medium layer forms multiple display regions. The insulation layer is disposed on the second stretchable electrode layers, and has multiple through holes in which multiple conductive materials are respectively filled. The third stretchable electrode layer is disposed on the insulation layer, and is electrically connected to the second stretchable electrode layers through the conductive materials, respectively.

BACKGROUND

Technical Field

The disclosure relates to a display device, and in particular to an electrophoretic display device.

Description of Related Art

With the advancement of technology, various display media are widely used in various display applications, such as: televisions, laptops, electronic paper (e-paper) books, mobile phones, large advertising billboards, and various electronic labels and in mold electronics (IME) in stores, etc.

The current segment technology applications in electronic paper are mainly flat surfaces, such as flat outdoor array displays and flat installation art. The base materials are mostly glass or non-stretchable plastic. Although the segmented display device has the advantage of low power consumption, the application level is relatively limited due to the non-curved surface.

SUMMARY

The disclosure provides an electrophoretic display device that may be disposed on a curved surface and may also be combined with segment technology.

An embodiment of the disclosure provides an electrophoretic display device, including a first stretchable material layer, a first stretchable electrode layer, a stretchable electrophoretic display medium layer, multiple second stretchable electrode layers, an insulation layer, and a third stretchable electrode layer. The first stretchable electrode layer is disposed on the first stretchable material layer. The stretchable electrophoretic display medium layer is disposed on the first stretchable electrode layer. The second stretchable electrode layers are separately disposed on the stretchable electrophoretic display medium layer, so that the stretchable electrophoretic display medium layer forms multiple display regions. The insulation layer is disposed on the second stretchable electrode layers and has multiple through holes in which multiple conductive materials are respectively filled. The third stretchable electrode layer is disposed on the insulation layer, and is electrically connected to the second stretchable electrode layers through the conductive materials, respectively.

An embodiment of the disclosure provides an electrophoretic display device, including the first stretchable material layer, the first stretchable electrode layer, the stretchable electrophoretic display medium layer, the second stretchable electrode layer, the insulation layer, and the third stretchable electrode layer. The first stretchable electrode layer is disposed on the first stretchable material layer. The stretchable electrophoretic display medium layer is disposed on the first stretchable electrode layer. The second stretchable electrode layer is disposed on the stretchable electrophoretic display medium layer, so that the stretchable electrophoretic display medium layer forms the display region. The insulation layer is disposed on the second stretchable electrode layer and has the through hole, and the through hole is filled with the conductive material. The third stretchable electrode layer is disposed on the insulation layer, and is electrically connected to the second stretchable electrode layer through the conductive material.

In the electrophoretic display device according to the embodiment of the disclosure, since a variety of stretchable materials are used to form various layer structures, the electrophoretic display device according to the embodiment of the disclosure may be disposed on the curved surface and curve as the surface curves. In the electrophoretic display device according to another embodiment of the disclosure, in addition to using the variety of stretchable materials to form the various layer structures, the second stretchable electrode layers are used to be separately disposed on the stretchable electrophoretic display medium layer, so that the stretchable electrophoretic display medium layer forms the display regions. Therefore, the electrophoretic display device according to the embodiment of the disclosure may be disposed on the curved surface and curve as the surface curves, and may be combined with segment technology at the same time.

DESCRIPTION OF THE EMBODIMENTS

FIG.1is a partial cross-sectional schematic view of an electrophoretic display device according to an embodiment of the disclosure.FIG.2is a schematic top view of the electrophoretic display device ofFIG.1. Referring toFIGS.1and2, an electrophoretic display device100of this embodiment includes a first stretchable material layer110, a first stretchable electrode layer120, a stretchable electrophoretic display medium layer130, multiple second stretchable electrode layers140, an insulation layer150, and a third stretchable electrode layer160. The first stretchable electrode layer120is disposed on the first stretchable material layer110. The stretchable electrophoretic display medium layer130is disposed on the first stretchable electrode layer120. The second stretchable electrode layers140are separately disposed on the stretchable electrophoretic display medium layer130so that the stretchable electrophoretic display medium layer130forms multiple display regions A1.FIG.1shows two display regions A1as a representative. In fact, the electrophoretic display device100may also have more display regions A1.FIG.2shows an example of nine display regions A1. The display regions A1may be arranged in an array.

The insulation layer150is disposed on the second stretchable electrode layers140and has multiple through holes152. The through holes152are respectively filled with multiple conductive materials170. In this embodiment, the insulation layer150may be stretchable and may be formed by a stretchable material. The third stretchable electrode layer160is disposed on the insulation layer150, and is electrically connected to the second stretchable electrode layers140through the conductive materials170, respectively. The second stretchable electrode layers140of different display regions A1may be independently and electrically connected to different pads180through different traces162in the third stretchable electrode layer160, respectively. In this way, voltages may be applied to the pads independently to control the display states of these display regions A1independently and respectively.

In this embodiment, the electrophoretic display device100further includes a second stretchable material layer190disposed on the third stretchable electrode layer160.

In the electrophoretic display device100of this embodiment, a variety of stretchable materials are used to form various layer structures, and the second stretchable electrode layers140are used to be separately disposed on the stretchable electrophoretic display medium layer130, so that the stretchable electrophoretic display medium layer130forms the display regions A1. The stretchable electrophoretic display medium layer130may be a whole piece or a combination of multiple pieces. Therefore, the electrophoretic display device100of this embodiment may be disposed on the curved surface and curve as the surface curves to achieve a conformal effect, and may also be combined with segment technology. In this embodiment, a lower surface of the second stretchable material layer190may be attached to any shaped surface (such as various simple or complex curved surfaces), such as being attached to a home appliance or indicating device with the curved surface to increase a display diversity of home appliances or indicating devices.

In this embodiment, a material of the first stretchable material layer110and the second stretchable material layer190is, for example, amorphous polyethylene terephthalate (APET). In addition, in this embodiment, a material of the first stretchable electrode layer120, the second stretchable electrode layers140, and the third stretchable electrode layer160is, for example, poly(3,4-ethylenedioxythiophene) (PEDOT). The second stretchable electrode layers140and the third stretchable electrode layer160may be formed by coating the liquid PEDOT twice and solidifying the PEDOT. In this way, a segmented display control may be realized on the conformal electrophoretic display device100.

In addition, in this embodiment, the stretchable electrophoretic display medium layer130may include multiple capsules132distributed therein. The stretchable electrophoretic display medium layer130may further include multiple electrophoretic particles134disposed in the capsules132. The electrophoretic particles134may include black electrophoretic particles and white electrophoretic particles, or include colored electrophoretic particles. When applying voltages between the first stretchable electrode layer120and the second stretchable electrode layer140, a distribution state of the electrophoretic particles of different colors may be changes through an electrophoretic effect to achieve different display effects.

In this embodiment, the electrophoretic display device100further includes a decorative layer195disposed on the first stretchable material layer110, and the first stretchable material layer110is disposed between the first stretchable electrode layer120and the decorative layer195. The decorative layer195may have various colors, patterns, or designs to enhance aesthetics and texture of the electrophoretic display device100.

In another embodiment, referring toFIG.3, the second stretchable electrode layer140may also be a single whole-layer structure disposed on the stretchable electrophoretic display medium layer130, so that the stretchable electrophoretic display medium layer130forms the display region A1. In addition, the insulation layer150may have the through hole152, and the through hole152is filled with the conductive material170. The third stretchable electrode layer160is electrically connected to the second stretchable electrode layer140through the conductive material170.

In summary, in the electrophoretic display device according to the embodiment of the disclosure, since the variety of stretchable materials are used to form the various layer structures, the electrophoretic display device according to the embodiment of the disclosure may be disposed on the curved surface and curve as the surface curves. In addition, the second stretchable electrode layers may also be separately disposed on the stretchable electrophoretic display medium layer, so that the stretchable electrophoretic display medium layer forms the display regions. Therefore, the electrophoretic display device of the embodiment of the disclosure may be disposed on the curved surface and curve as the surface curves, and may also be combined with segment technology.