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`A liquid crystal display device inciudes a plurality of pixels having a first and
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`second pixel group corresponding respectively to odd and even-numbered lines
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`extending along gate signal lines, an alternation signa! transmitter outputting an
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`alternation signal, an alternating circuit alternating polarities of voltages applied to
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`the plurality of pixels for every frame period with respect to the alternation signal, a
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`first and a second accumulator accumulating respective signal levels of pixe] data of
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`the first and second pixel groups for every frame period and outputting a first and a
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`second value, and a subtracter which outputs a result of subtraction betweenthe first
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`10
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`value and the second value. The alternation signai transmitter outputs a first
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`alternation signal when the result of the subtraction is less than a reference value
`and outputs a second alternation signal when the result of the subtraction is not less
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`than the reference value.
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`21
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