| 摘要 |
An in-plane switching liquid crystal display device is designed in such a way that an angle defined by the lengthwise direction of a common electrode and a pixel electrode and a rubbing direction of an alignment layer is set to 10 to 20°, a cell gap d is set to 2.7 mum or smaller, the dielectric anisotropy Delta∈ of a liquid crystal constituting a liquid crystal layer is set to 8 to 20, a white voltage Vwhite to be applied to the pixel electrode when displaying white is set to 4 to 7 V, and the white voltage Vwhite (V), the dielectric anisotropy Delta∈ of the liquid crystal, the cell gap d (mum) and an interval L (mum) between the common electrode and the pixel electrode satisfy the following expression <maths id="MATH-US-00001" num="00001"> <math overflow="scroll"> <mrow> <mn>11.8</mn> <mo>></mo> <mfrac> <msub> <mi>V</mi> <mi>white</mi> </msub> <mrow> <msup> <mi>d</mi> <mrow> <mo>-</mo> <mn>0.6</mn> </mrow> </msup> <mo>x</mo> <msup> <mi>L</mi> <mn>0.5</mn> </msup> <mo>x</mo> <msup> <mi>Deltaɛ</mi> <mrow> <mo>-</mo> <mn>0.5</mn> </mrow> </msup> </mrow> </mfrac> <mo>></mo> <mrow> <mn>9.8</mn> <mo>.</mo> </mrow> </mrow> </math> </maths>
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