Watch having an analog display and a digital display
First Claim
1. A watch comprising a casing, movable members for displaying time analogically, dial means for said movable members, and digital display means surrounded by said dial means and responding to a first external action by taking substantially the same colour as that of said dial means and also responding to a second external action by taking a colour different from that of said dial means.
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Accused Products
Abstract
A watch which comprises movable analog display members, a dial and a digital display cell surrounded by said dial. The watch is further provided with means that can be controlled by the user of the watch, for making the digital display device visible or invisible, as desired.
The digital display cell is of the twist nematic type.
A liquid crystal layer 60a is positioned between two polarizers 60b and 60c. Polarizer 60c can be rotated about an axis 12 perpendicular to its plane by actuating means 13a, 14, 15, 17 which is accessible from the outside of the casing of the watch. The cell can be made substantially invisible by rotating the movable polarizer 60b in order to position its polarizing plane either parallel or perpendicular to the polarizing plane of the other polarizer 60c, depending on whether the color of the dial around the cell is dark or light respectively. Other optical arrangements are disclosed for causing the display device to take selectively the color of the dial and a second color different from the dial'"'"'s color.
48 Citations
14 Claims
- 1. A watch comprising a casing, movable members for displaying time analogically, dial means for said movable members, and digital display means surrounded by said dial means and responding to a first external action by taking substantially the same colour as that of said dial means and also responding to a second external action by taking a colour different from that of said dial means.
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3. a surface for reflecting incident light,
means having a locally controllable opacity for covering said reflecting surface, opaque screen means having an upper surface which present the same colour as that of said dial means, and actuating means accessible from the outside of said casing for setting said screen means in a first position in which it is interposed in the path of said light and in a second position in which it is not interposed in said path.
Specification