Abstract: A construction block 1, which can be used to build ornamental structures, wall boards, decorative coatings etc., includes a front face 2, a back face 3 and edges 4. Each edge has a projection 5 and a recess 6. The projection includes a claw 7 on both sides of the projection 5, and the recess includes a notch 8 on both sides of the recess 6. The projection matches with the recess in order to connect the construction block 1 to a similar construction block. The construction block includes also a wheel 9 that has wedges 11 for each edge 4 of the construction block. The wedge 11 locks the connection between the construction block 1 and the similar construction lock when turning the wheel 9.

Abstract: A display module which can be used as a part of a display assembly includes a box wherein a display matrix unit, a driver arrangement, a control unit, and a memory unit are located. The display matrix unit provides a front face of the box. The box has at least three edges, each of them including a mechanical lock part and a communication interface.

Abstract: A construction block 1, which can be used to build ornamental structures, wall boards, decorative coatings etc., includes a front face 2, a back face 3 and edges 4. Each edge has a projection 5 and a recess 6. The projection includes a claw 7 on both sides of the projection 5, and the recess includes a notch 8 on both sides of the recess 6. The projection matches with the recess in order to connect the construction block 1 to a similar construction block. The construction block includes also a wheel 9 that has wedges 11 for each edge 4 of the construction block. The wedge 11 locks the connection between the construction block 1 and the similar construction lock when turning the wheel 9.

Abstract: A display module which can be used as a part of a display assembly includes a box wherein a display matrix unit, a driver arrangement, a control unit, and a memory unit are located. The display matrix unit provides a front face of the box. The box has at least three edges, each of them including a mechanical lock part and a communication interface.