A digital sign including both a light-emitting diode display and a display screen contained within a housing unit. A control module is provided to control the light-emitting diode display and the display screen; and a power source is provided to provide power to the light-emitting diode display, the display screen and the control module. A cover plate is securable to the housing unit to contain the light-emitting diode display, the display screen, the control module, and the power source. The light-emitting diode display and the display screen are visible from outside of the housing unit and the control module and the power source are not visible from outside the housing unit.

An electronic paper package structure including a substrate, an electronic ink layer, a cover plate, at least one water vapor barrier and a sealant is provided. The electronic ink layer is disposed on the substrate. The cover plate covers the electronic ink layer, wherein the electronic ink layer is located between the substrate and the cover plate, and a groove is defined by a lower surface of the cover plate, a side surface of the electronic ink layer and an upper surface of the substrate. The at least one water vapor barrier is disposed in the groove. The sealant is filled into the groove to cover the at least one water vapor barrier.

An electronic paper package structure including a substrate, an electronic ink layer, a cover plate, at least one water vapor barrier and a sealant is provided. The electronic ink layer is disposed on the substrate. The cover plate covers the electronic ink layer, wherein the electronic ink layer is located between the substrate and the cover plate, and a groove is defined by a lower surface of the cover plate, a side surface of the electronic ink layer and an upper surface of the substrate. The at least one water vapor barrier is disposed in the groove. The sealant is filled into the groove to cover the at least one water vapor barrier.

A display device includes: a display panel; a driver IC that outputs a driving signal to the display panel; a flexible substrate on which the driver IC is mounted; a first frame that supports the display panel from a side of a light source; and a second frame that supports the light source while being provided independently of the first frame. The first frame includes a metallic frame unit which is opposite to the driver IC from the side of the light source.

A cover plate structure includes a first light transmitting layer, a second light transmitting layer, and a light shielding layer. The first light transmitting layer includes a top surface and a bottom surface opposite the top surface. The second light transmitting layer is on the top surface of the first light transmitting layer. A refractive index of the first light transmitting layer is greater than a refractive index of the second light transmitting layer. The light shielding layer is on the bottom surface of the first light transmitting layer.

A cover plate structure includes a first light transmitting layer, a second light transmitting layer, and a light shielding layer. The first light transmitting layer includes a top surface and a bottom surface opposite the top surface. The second light transmitting layer is on the top surface of the first light transmitting layer. A refractive index of the first light transmitting layer is greater than a refractive index of the second light transmitting layer. The light shielding layer is on the bottom surface of the first light transmitting layer.

Embodiments of the disclosure provide an electronic paper display screen, a display device and a bonding method. The electronic paper display screen includes a substrate, the substrate including a display region and a bonding region on at least one side of the display region and adjacent to the display region, an electronic paper, the electronic paper being disposed in the display region and including an electronic ink conduction portion, the electronic ink conduction portion being at an edge of the electronic paper close to the bonding region and extending to the bonding region of the substrate, a bonding electrode disposed in the bonding region of the substrate, and a chip-on-film, the chip-on-film being electrically connected to the bonding electrode, and an end of the chip-on-film close to the display region being between the substrate and the electronic ink conduction portion.

An electrophoretic particle includes a particle and a coating layer, in which the coating layer includes at least one of dispersibility and chargeability, and includes a polymer that connects to the particle, where the polymer includes a first functional group and is connected to the particle via a connected body, the connected body has a molecular weight of 500 or less and includes a second functional group and a third functional group, and the particle, the connected body and the polymer are connected via the chemical bond formed by reacting the first and second functional groups and the chemical bond formed by reacting the hydroxyl group and the third functional group.

An electronic device with a flexible display subassembly is provided. The display stack may use two layers of adhesives having different elastic properties to improve mechanical impact resistance, with a first adhesive layer made of a viscoelastic material and a second adhesive layer having a low modulus of elasticity. The display stack may also include a hot melt protective sheet (HMPS) covering the display subassembly. The HMPS may be wrapped around the two side edges of a rigid substrate to attach directly to the substrate, thereby aiding in the adhesion of the display stack to the substrate. The display stack may also includes a patterned back protective sheet in which the protective backing layer is removed along the curved portions of the display stack.

A rollable display device includes: a soft display panel; a main roller for winding or unwinding the soft display panel; an actuator coupled to the soft display panel to ascend and descend the soft display panel; a housing having the main roller mounted therein, wherein an opening extending in a first direction is defined in a top of the housing to retract and extend the soft display panel therethrough; and an elastic portion having one end coupled to a perimeter of the opening and protruding to cover at least a portion of the opening, wherein the elastic portion includes a rubber portion having a predetermined length along the first direction. The rollable display device may minimize exposure of an interior of the housing to prevent foreign substances from entering.