Light reflector and surface light source device using the same

Light reflector and surface light source device using the same

  • CN 101,084,458 B
  • Filed: 12/16/2005
  • Issued: 11/30/2011
  • Est. Priority Date: 12/17/2004
  • Status: Active Grant
First Claim
Patent Images

1. light reflector, it is characterized in that, this light reflector is 15 °

  • in the irradiate light angle, the variable-angle reflection rate R1 when light angle is 0 °

    is 90%~

    120%, be 75 °

    in the irradiate light angle, the variable-angle reflection rate R2 when light angle is 0 °

    is 85%~

    110%, and described light reflector has at least one feature in following (1) and (2);

    (1) described light reflector has substrate layer, and described substrate layer contains thermoplastic resin and filler and stretches along the single shaft direction at least;

    (2) described light reflector has substrate layer, described substrate layer contains thermoplastic resin and filler and stretches with 1.3 times~

    80 times area stretching ratio, wherein, the mensuration of R1 is carried out under the following conditions;

    make the normal direction of irradiate light angle and sample surfaces be 15 °

    , make light angle be 0 °

    , if the variable-angle reflection rate of the standard white plate of ceramic is 100%, represent that with relative value the variable-angle reflection rate R1 of described light reflector, described standard white plate are standard white plate subsidiary among the angle spectrophotometer GCMS4;

    The mensuration of R2 is carried out under the following conditions;

    make the normal direction of irradiate light angle and sample surfaces be 75 °

    , make light angle be 0 °

    , if the variable-angle reflection rate of the standard white plate of ceramic is 100%, represent that with relative value the variable-angle reflection rate R2 of sample, described standard white plate are standard white plate subsidiary among the angle spectrophotometer GCMS4.

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