A drawing device with a rotatable display screen is provided, having a housing having a cavity therein and a display screen sealingly rotatably coupled to the housing. An inner surface of the display screen forms an enclosure with the cavity. A powder is contained within the enclosure, the powder being removably adherent to the inner surface of the display screen. A first stylus controller is supported on an exterior of the housing. At least one positioning structure is supported in the enclosure and coupled to the first stylus controller to move a first stylus in a first set of directions that are parallel to a first axis. The first stylus removes the powder from the inner surface of the display screen through contact with the inner surface of the display screen.

A re-useable writing surface reusably and removably coupled to exterior surfaces is disclosed. The re-useable writing surface may include a porous layer. The porous layer may define one or more cells. The re-usable writing surface may further include a non-adhesive coating applied to a side of the porous layer. The re-usable writing surface may further include a writeable layer coupled to a different side of the porous layer. The writeable layer may be configured to allow a user to draft and erase content. The non-adhesive coating can enable the re-useable writing surface to reusably and removably couple to exterior surfaces.

A re-usable writing surface reusably and removably coupled to exterior surfaces is disclosed. The re-usable writing surface may include a porous layer. The porous layer may define one or more cells. The re-usable writing surface may further include a non-adhesive coating applied to a side of the porous layer. The re-usable writing surface may further include a writable layer coupled to a different side of the porous layer. The writable layer may be configured to allow a user to draft and erase content. The non-adhesive coating can enable the re-useable writing surface to reusably and removably couple to exterior surfaces.

A media display assembly that includes a base assembly, including a base and a steel plate that forms a front surface of the base assembly and is removably affixed to the base, and wherein the base defines a set of resiliently deformable inwardly facing side surfaces. A cover, including a sheet having transparent display portion, is fit and held by tension between the resiliently deformable inwardly facing side surfaces. Finally, display media is interposed between the steel plate and the cover.

A media display assembly that includes a base assembly, including a base and a steel plate that forms a front surface of the base assembly and is removably affixed to the base, and wherein the base defines a set of resiliently deformable inwardly facing side surfaces. A cover, including a sheet having transparent display portion, is fit and held by tension between the resiliently deformable inwardly facing side surfaces. Finally, display media is interposed between the steel plate and the cover.

A touch blackboard comprises at least one glass blackboard, at least one touch film and at least one display unit; the touch film is affixed to the glass blackboard for the back of a writing side, and the display unit is placed at the back of the touch film. The touch blackboard not only has the functions of common glass blackboards, but is also additionly endowed with a touch display function, so as to realize man-machine interaction at the same time of displaying multimedia information. In addition, also provided are a touchboard frame, a touch all-in-one machine and a combined blackboard.

A touch blackboard comprises at least one glass blackboard, at least one touch film and at least one display unit; the touch film is affixed to the glass blackboard for the back of a writing side, and the display unit is placed at the back of the touch film. The touch blackboard not only has the functions of common glass blackboards, but is also additionly endowed with a touch display function, so as to realize man-machine interaction at the same time of displaying multimedia information. In addition, also provided are a touchboard frame, a touch all-in-one machine and a combined blackboard.

A display device is described which can be updated by applying pressure with a passive object. The display device comprises a transparent top conductor layer, a middle conductor layer and a bottom conductor layer. The middle conductor layer is segmented into a plurality of independent areas and a pixel of the display device is defined based at least in part on the way that the middle conductor layer is segmented. The display device further comprises an electrophoretic ink layer between the top and middle conductor layers, a layer of piezo-electric material between the middle and bottom conductor layers, and an electrical connection between the bottom and top conductor layers.

An erasable slate system includes a translucent layer adjacent a colored bottom layer, wherein application of a force to the translucent layer causes temporary adhesion of the translucent layer to the colored bottom layer in an area wherein the force is applied. The erasable slate system further includes an extending channel in fluid connection with the translucent layer and the colored bottom layer. The extending channel extends around at least 25% of the length of a perimeter of the bottom colored layer. The erasable slate system further includes an air pump in fluid connection with the extending channel via which pressurized air can be introduced into the extending channel to cause the translucent layer to be separated from adhesion to the colored bottom layer, thereby erasing markings, and via which air can exit the extending channel of the erasable slate system.

High contrast, glass-based, writeable/erasable front projection screens are provided. The screens include a transparent glass sheet which has a front surface and a back surface separated by a distance d. The back surface is in optical contact with a diffusing element. During use of the projection screen, the glass sheet transmits image light from a projector to the diffusing element and the diffusing element reflects a portion of that light back through the glass sheet to a user. The screens have a user-facing surface that is a writable/erasable surface. In embodiments, the distance d is less than or equal to 0.2 millimeters, the whiteness W of the projection screen is less than or equal to 0.5, and/or the contrast C of the projection screen is at least 75%.