Liquid crystal display device displaying coloured segments and timepiece equipped with such a device

Liquid crystal display device displaying coloured segments and timepiece equipped with such a device

  • CN 101,390,005 A
  • Filed: 02/20/2007
  • Published: 03/18/2009
  • Est. Priority Date: 02/27/2006
  • Status: Active Grant
First Claim
Patent Images

1. a liquid crystal (38) display device (12), it comprises display surface (28), and described display surface (28) is oriented to towards at the top of the equipment (12) of observer'"'"'s side, and described equipment (12) comprising:

  • -liquid crystal (38) unit (30), it comprises;

    at least one head substrate (32) and a bottom substrate (34), at these two substrates (30,32) at least two electrodes (40) that form on the opposite face and at least one counter electrode (42), the part of each electrode (40) representative symbol figure or symbol figure;

    -control module (26), it is applied between selected electrode (40) and the counter electrode (42) by the control voltage with determined value and controls liquid crystal (38) unit (30), with orientation that changes liquid crystal (38) and the demonstration that causes corresponding symbol figure, and-back lighting module (48), it is set at the below of liquid crystal cells (30) on a side relative with display surface (28), this module comprises at least the first light source (50) and the secondary light source (52) that color is different, these light sources are at least one light guide (54) internal emission light (Rr, Rb), described light guide (54) comprises permission light (Rr, the end face that Rb) leaves (70)Described equipment (12) is characterised in that;

    described light guide (54) comprises light (Rr, Rb) to a plurality of prisms (64 of display surface (28) deflection,

         66), the prism (64 of first group (S1),

         66) be oriented to the light (Rr) that sends with deflection first light source (50) towards first light source (50), the prism of second group (S2) (52) is oriented to the light (Rb) that sends with deflection secondary light source (52) towards secondary light source (52);

    And these prisms (64,66) are distributed in the zone that only is in electrode (40) below of light guide (54), with will (Rr Rb) is focused on these electrodes (40) from the light of the end face (70) of light guide (54).

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