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Transflective liquid crystal display having a relationship between the electrode spacing and cell gap in the reflection and transmission regions

  • US 7,995,168 B2
  • Filed: 05/22/2006
  • Issued: 08/09/2011
  • Est. Priority Date: 05/25/2005
  • Status: Expired due to Fees
First Claim
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1. A liquid crystal device comprising:

  • first and second substrates which are arranged so'"'"' as to face each other with a liquid crystal layer interposed therebetween; and

    first and second electrodes which are provided on the first substrate facing the liquid crystal layer, each of the first and second electrodes having one or more strip electrodes, the liquid crystal layer being driven by electric fields generated between the first and second electrodes,a reflective display region for reflective display and a transmissive display region for transmissive display being provided in each of a plurality of subpixel regions,a liquid-crystal-layer-thickness-adjusting layer being provided in at least the reflective display region so as to vary the thickness of the liquid crystal layer in the subpixel region,a gap between the first and second electrodes in a main direction of an electric field in the transmissive display region being narrower than a gap between the first and second electrodes in a main direction of an electric field in the reflective display region,the one or more strip electrodes of the first electrode and the one or more strip electrodes of the second electrode being alternately arranged substantially in parallel with each other in each of the transmissive display region and the reflective display region, anda product dt×

    Gt of the gap dt between the first electrode and the second electrode in the electric field direction in the transmissive display region and the thickness Gt of the liquid crystal layer in the transmissive display region being substantially equal to a product dr×

    Gr of the gap dr between the first electrode and the second electrode in the reflective display region and the thickness Gr of the liquid crystal layer in the reflective display region, whereinthe thickness of the liquid crystal layer of the reflective display region is smaller than, the thickness of the liquid crystal layer of the transmissive display region.

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