An electronic timepiece device comprises an electronic processing unit determining first, geolocation parameters and second parameters concerning the current legal standard time, and establishing local horizontal coordinates of the Sun from predetermined calculation rules stored in a memory of the electronic processing unit. The device also comprises a dial equipped with a casing enclosing all or part of the electronic processing unit and equipped with a display system displaying at least one indicator hand having an orientation that varies over time such that the angle formed between the indicator hand and a first fixed reference axis of the dial is equal, at each instant, to the azimuth of the Sun established by the processing unit, and a time scale calculated by the electronic processing unit and displayed at the periphery of the dial in the form of a plurality of time points positioned, with respect to the first fixed reference axis, as a function of the azimuth of the Sun respectively at the times of which the time points are representative. Thus the indicator needle simultaneously indicates, at each instant, a representation of the relative directions of the Sun and of the cardinal point of the culmination of the Sun and the current legal time.

An optical device including a transparent support provided with an upper face and a lower face which extends at a distance from the upper face, the transparent support forming a lens of plano-concave shape delimited on a first side by a planar surface, and delimited on a second side, opposite the first side, by a concave surface, the optical device also including a shutter which is disposed under the concave surface of the transparent support, at a distance therefrom, the optical device finally including a substrate disposed after the shutter.

An improved astronomical calendar clock mechanism, integrating a sun-centered planetary dial with an earth-centered celestial ring with a fixed orientation number dial located in the earth's equatorial plane, with the sun on a meridian track fixed at 12 on the number dial, and the meridian track indicates the date on a calendar band which is applied to the outside edge of the celestial ring in a plane parallel to the celestial equator, and an hour hand emerging from the earth globe at the center of the celestial ring indicates the time relative to the fixed orientation number dial framing the earth.

Disclosed is a timepiece blocking device including first and second mobile parts kinematically connected to one another, the first mobile part including a drive device, the second mobile part including a stopping device; a rotating drive member turning in a single direction and cooperating with the drive device to displace the first mobile part, and thus the second mobile part, alternately in opposite directions; and a rotating blocking member tensioned and cooperating with the stopping device to be blocked by the second mobile part and released at determined times by the displacements of the second mobile part. Cooperation between the rotating blocking member and stopping device immobilizes the mobile parts when the rotating drive member does not cooperate with the drive device. In normal operation, the rotating drive member contacts the first mobile part only when cooperating with the drive device, i.e. over less than 60% of one revolution of the rotating drive member.

A watch includes a timepiece movement including a mechanism for displaying a time period or season which includes a first wheel which is provided in order to turn once in thirty-one days for displaying a day of the month, and a second wheel for displaying another time period or season. The second wheel turns more quickly than the first wheel for displaying this time period or season, and the second wheel is provided in order to be displaced from the first wheel, at the rate of one turn in a period of time between 340 days and 380 days.

A liquid crystal display device, the display device including: two facing transparent substrates designated respectively front substrate and rear substrate, the front substrate being same disposed on the observer side, the front and rear substrates being provided on the inner faces thereof with transparent structured electrodes whereof the superposition defines shape pixels switchable between two optical states, the electrodes being connected to a voltage source via a control circuit, forming a cell closed by a sealing frame for receiving in the spaced delimited by the substrates and the sealing frame a liquid crystal composition; and a decorative pattern in direct contact with the front substrate or the rear substrate.

A timepiece component including a shaft-like portion including at least one pivot about a pivot axis, at least the material forming this shaft-like portion is a non-magnetic alloy containing at least silver and palladium and having a Vickers hardness of more than 450 HV.

A lunar phase display device including an annular cover including four ring portions, two successive ring portions being separated by a convex lobe projecting radially towards the inside of the annular cover; a moon indicator disc, a drive device arranged to move the moon indicator disc so that the disc makes a cycloidal trajectory between two successive lobes, the moon indicator disc being at least partially occulted by each of the two lobes during one portion of the cycloidal trajectory so as to reproduce the phases of the moon during a lunar month.

An adjustment mechanism for a timepiece display including an input wheel driving a control wheel controlling the position of a first display member, and including a differential mechanism which includes a drive wheel set retained by a jumper and pivotable via the first input wheel, to drive a planetary wheel meshing with the control wheel and pivoting off-centre with respect to a planetary wheel holder friction-mounted on a frame, the differential mechanism multiplying by a particular factor the rotation between one of the inputs and the output of the differential mechanism when the other input is stationary, and the planetary wheel holder includes manipulating device allowing a watch technician to release the friction to change the angular position of the planetary wheel and thus of the control wheel for correct indexing thereof with respect to another display member.

A moon phase display mechanism driven by a horological movement, this moon phase display mechanism including a transparent support provided with an upper face and a lower face which extends at a distance from the upper face, a representation of the Moon being transferred, for example by printing or by engraving, to one of the upper or lower faces of this transparent support, a substrate being disposed under the transparent support, at a distance therefrom, the moon phase display mechanism also including a shutter which is driven by drive means moved by the horological movement and which is arranged so as to displace between the transparent support and the substrate, the shutter and the substrate having display contrasts which are inverted relative to each other.