A display hand for a portable object including an indication by the display hand, inside which is housed a rechargeable electrical energy source. The display hand includes at least one solar cell, the electrical energy source being connected to the display hand to be recharged.

A display device (100) for a watch (1000) including at least one light source (200) and including, between a dial (300) carrying at least one reference scale on a top side (301) and a crystal (400) on the side facing the user a set of hands (10) coaxial about an axis of rotation (D) including at least a first luminous indicator (1) including a first light guide (11) arranged to diffuse some of the light emitted by said at least one light source (200), wherein the first light guide (11) includes first coupling microstructures (110) which are arranged to allow light to enter the first light guide (11) and/or to allow light to exit the first light guide (11).

A set of luminous display hands is for a portable object including a frame housing an electrical energy supply source that includes a first and a second terminal. The set includes at least first and second luminous display hands made of an electrically non-conductive material. A drive arbor of the second display hand is arranged concentrically inside a drive arbor of the first display hand. Each of the first and second display hands carries a first, respectively a second light source which emits light. The first and second light sources each include a first and a second pole. Depending on whether the light sources are mounted in parallel or in series, the first pole or the second pole of the second light source is connected to the first pole of the first light source by contact between the first and second hands.

A method for producing a functional element on a timepiece component, including generating, with a control unit, at least one control command for a printing device intended to reproduce a reference digital graphical representation relating to the functional element; and constructing, with the printing device, at least one layer of at least one functional particle printed on the timepiece component so as to form the functional element.

A luminous display device (1) configured to be fitted in a watch case, including a dial (2) with a dial body (20) having an upper face (21), and a hand (3, 4, 5) arranged above the dial (2) and mounted on a rotary arbor on the dial body (20). The hand has a layer forming a light guide (31, 41) to diffuse a luminous flux emitted by a lighting module (70) including an open cloisonn space (10) delimited by a back (26) formed by a dial rest (7) and by a peripheral wall (22) forming a screen made in one piece with the dial. The wall is positioned around the rotary arbor and extends above the dial body (20) over a defined height. The lighting module has a light source (6) arranged to emit a luminous flux towards the hand so as to illuminate the hand from below.