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Liquid crystal display device with light transmission and reflection regions

  • US 6,819,379 B2
  • Filed: 08/13/2001
  • Issued: 11/16/2004
  • Est. Priority Date: 12/26/1997
  • Status: Expired due to Term
First Claim
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1. A liquid crystal display device comprising:

  • a first substrate and a second substrate;

    a liquid crystal layer interposed between the first substrate and the second substrate;

    a first polarizer provided on a surface of the first substrate which is opposite the liquid crystal layer;

    a second polarizer provided on a surface of the second substrate which is opposite the liquid crystal layer;

    a first phase compensation element provided between the first polarizer and the liquid crystal layer; and

    a second phase compensation element provided between the second polarizer and the liquid crystal layer, wherein a plurality of pixel areas are provided for display, each of the plurality of pixel areas is a liquid crystal region including a reflection area for performing display using reflected light and a transmission area for performing display using transmitted light, wherein a reflective electrode region defining the reflection area and a transmissive electrode region defining the transmission area are formed in correspondence with each pixel area on the second substrate, and wherein a thickness (d1) of the liquid crystal layer in the transmissive electrode region and a thickness (d2) of the liquid crystal layer in the reflective electrode region are defined by a relationship d1>

    d2, and wherein thickness d1 is substantially larger than thickness d2 so that electrooptical characteristics of the reflection area and the transmission area are approximately matched.

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