Time piece e.g. wristwatch, has UV LED for illuminating zones incorporating fluorescent pigments of indicator elements, and inner surface of glass partially covered with reflecting layer reflecting UV light on zones of elements

摘要

#CMT# #/CMT# The time piece has a lighting device comprising an UV LED (4a) for illuminating zones (9) incorporating fluorescent and/or phosphorescent pigments of indicator elements (6) e.g. hands, visible across the glass. A glass (3) has an inner surface partially covered with a UV light reflecting layer (14) reflecting the UV light on the zones of the elements. The LED is placed on a side of a dial (5) forming a wave guide (10) to broadcast the UV light from the diode towards top in the direction of the glass. The glass has a predetermined curvature so as to redirect UV light rays on the elements. #CMT#USE : #/CMT# Time piece e.g. wristwatch. #CMT#ADVANTAGE : #/CMT# The glass has a predetermined curvature so as to redirect UV light rays on the indicator elements so as to strengthen lighting and improve contrast for increasing visibility of indicators elements in dark environment, thus improving reading of time in the dark environment, without increasing power and number of LEDs. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a sectional schematic view of a timepiece. 3 : Glass 4a : UV LED 5 : Dial 6 : Indicator elements 9 : Zones 10 : Waveguide 14 : UV light reflecting layer.