The present invention discloses a layered electro-magnetic refreshable braille display device and braille reader. The layered electro-magnetic refreshable braille display device includes three layers of braille display modules and a touch panel. Each braille display module includes 5 plates and a plurality of tactile pin driving mechanisms for driving the “up” and “down” of the braille dots. One or more lines of braille cells are arranged on the touch panel. Each line of braille cells displays a plurality of braille characters. A microprocessor is connected to a braille translation module, a voice playing module and an interaction controller respectively, wherein the interaction controller is connected to the braille display device, to form the braille reader. This device can display one or more lines of braille characters by relying on the electro-magnetic principle. It boasts real-time refreshing of the braille, synchronization of braille display and voice playing.

A head lamp for a vehicle includes: a lamp housing; a light source disposed in the lamp housing and configured to emit light to a forward area of a vehicle; a bezel disposed on the lamp housing, spaced apart from the light source, and shaped to cover the light source; and a plurality of flip-dot units disposed in the bezel. Each flip-dot unit among the plurality of flip-dot units includes: a housing having an opening formed on one side the housing, and a space formed in the housing; and a flip disk rotatably installed in the housing and configured to selectively open and close the opening.

The invention lies in the field of tactile displays and optical-tactile seeing aids. In order, proceeding from the known tactile displays having linear magnetic actuators, to provide such an electromagnetic actuator for tactile applications, in particular for tactile pins in Braille script displays and graphical surface displays, by means of which electromagnetic actuator an inexpensive bistable electromagnetic linear drive unit of simple mechanical design can be realized, the bar of the actuator consists of a material having very high coercivity, i.e. the polarity thereof cannot be changed, the bar being axially enclosed by a hard magnetic sleeve having at most the same length and having considerably lower coercivity, i.e. the polarity thereof can be changed, and the bar being freely movable in the axial direction and the actuation distance of the bar being defined by the excess length of the bar in comparison with the length of the hard magnetic sleeve, such that an auxiliary pole is formed at one end of the bar and a planar main pole is formed at the opposite end.

A plurality of individually controllable LED modules (LEDs) are provided for displaying defined patterns. At least a first and second cables are provided with three or more conductive wires insulated from one another comprising at least one reference voltage wire, a positive voltage wire and a data wire. Each of a plurality of strips is maintained between the cables along a defined longitudinal distribution and receives the reference voltage, the positive voltage and the data therefrom. Each of the strips comprises a subset of the individually controllable LEDs positioned therealong in a defined transverse distribution. The display controller module comprises a processor that sends lighting instructions for the LEDs over the data wire. The lighting instructions are set considering the defined longitudinal distribution of the plurality of strips and the defined transverse distribution along each of the plurality of strips to provide the defined patterns.

A magnetic erasing device including a magnet that includes an S pole and an N pole extending along an axial direction of the magnet, and a rotation mechanism for rotating the magnet in a housing around an axis of the magnet, wherein lines of magnetic force generated around the axis of the magnet during rotation of the magnet are designed to be applied to magnetic particles in the microcapsules to erase a visible image on a magnetic panel when the axis of the magnet is spaced from a surface of the magnetic panel by a predetermined distance.

The purpose of the present invention is to provide a magnetic fluid display in which a magnetic fluid moves in response to a magnetic field and which may display a unique visual image according to the meeting and parting of the magnetic fluid. A magnetic fluid display (10) according to the present invention comprises: a display unit (110) including a transparent liquid into which a magnetic fluid (111) is injected; and a magnetic field generating unit (200) for applying a magnetic field (M) to the magnetic fluid (111) at a rear surface of the display unit (110). When the magnetic field is applied, the magnetic fluid moves in the transparent liquid in a directional manner, so that an image may be displayed on the display unit.

A magnetic erasing device includes a rotating member provided in an internal space of a cylindrical housing, a first magnet and a second magnet attached to the rotating member, and a motor for driving the rotating member. The first magnet is arranged so that the S pole is exposed and the second magnet is attached so that the N pole is exposed. By rotating the rotating member, the magnetic field generated by the first and second magnets is changed.

The disclosure relates to retractable display device (1) including a housing (3) having an internal space (31) defined therein, a rolling axle (32) positioned in the housing (3), an electronic display and a support structure (21) attached to a rear surface of the electronic display. The support structure (21) includes a plurality of juxtaposed support elements (210) capable of being rolled around the axle (32) with the electronic display in a storage position and of being unrolled upward, at least partially out of the housing (3), to provide a substantially planar front surface on which visual information may be displayed.

Disclosed are a light emission device including a magnetoactive element, a method of fabricating the same, and an electronic device including the light emission device. The disclosed light emission device may include a light emission layer; a first electrode and a second electrode spaced apart from each other on a first surface side of the light emission layer; and a magnetoactive fluid layer disposed on a second surface side of the light emission layer and having a plurality of nanostructures of which arrangement and distribution is configured to change according to application of a magnetic field. The light emitting properties of the light emission layer may be changed according to the arrangement and distribution of a plurality of nanostructures in the magnetoactive fluid layer. The plurality of nanostructures may include conductive nanowire and magnetic nanoparticle provided on the surfaces of the conductive nanowire.

A three-dimensional (3D) display system may include a peg array of multiple pegs. Each peg may be individually addressable and designed to move along one or more axes. The 3D display system may also include an induction array having multiple electromagnetic coils to generate electromagnetic fields. The electromagnetic fields may induce magnetic forces upon at least one peg to cause the peg to move along an axis into an actuated position. The 3D display may also include a display screen to be distended into a 3D topography via contact with at least one peg in the actuated position.