Video processing circuit, video processing method, liquid crystal display apparatus, and electronic apparatus

A video processing circuit for use with a liquid crystal display that includes pixels, the video processing circuit designating an applied voltage to be applied to at least one of the pixels based on a video signal, the video processing circuit comprising:

• a first boundary detection portion that analyzes a video signal of a first frame and detects a first boundary between a first pixel having an applied voltage that is lower than a first voltage and a second pixel having an applied voltage that is higher than a second voltage that is higher than the first voltage;
• a second boundary detection portion that analyzes a video signal of a second frame preceding the first frame and detects a second boundary between a third pixel having an applied voltage that is lower than the first voltage and a fourth pixel having an applied voltage that is higher than the second voltage;
• and
• a correction portion that corrects the applied voltage of the first pixel to a third voltage if the first boundary is an applied boundary and the applied boundary does not exist at a position corresponding to a position of the second boundary, the third voltage being higher than the first voltage and being lower than the second voltage.

A video processing method of designating an applied voltage to be applied to at least one pixel of a liquid crystal display, based on a video signal, comprising:

• analyzing a video signal of a first frame and detecting a first boundary between a first pixel having a first applied voltage and a second pixel having a second applied voltage, the first pixel being disposed adjacent to the second pixel, the first applied voltage being lower than the second applied voltage;
• analyzing a video signal of a second frame preceding the first frame and detecting a second boundary between a third pixel having a third applied voltage and a fourth pixel having a fourth applied voltage, the third pixel being disposed adjacent to the fourth pixel, the third applied voltage being lower than the fourth applied voltage;
• and
• correcting the first applied voltage to a fifth applied voltage if the first boundary is an applied boundary and the applied boundary does not exist at a position corresponding to a position of the second boundary, the fifth applied voltage being;
• higher than the first applied voltage and the fifth applied voltage being lower than the second applied voltage.

A video processing circuit for use with a liquid crystal display that includes pixels, the video processing circuit designating an applied voltage to be applied to at least one of the pixels based on a video signal, the video processing circuit comprising:

• a first boundary detection portion that analyzes a video signal of a first frame and detects a first boundary between a first pixel displaying a first grayscale and a second pixel displaying a second grayscale, the first pixel being disposed adjacent to the second pixel, the first grayscale including a first grayscale range that includes a minimum grayscale value, the second grayscale including a second grayscale range that includes a maximum grayscale value;
• a second boundary detection portion that analyzes a video signal of a second frame preceding the first frame and detects a second boundary between a third pixel displaying a third grayscale and a fourth pixel displaying a fourth grayscale, the third pixel being disposed adjacent to the fourth pixel, the third grayscale including the first grayscale range, the fourth grayscale including the second grayscale range;
• and
• a correction portion that corrects a displaying grayscale of the first pixel to a fifth grayscale if the first boundary is an applied boundary and the applied boundary does not exist at a position corresponding to a position of the second boundary, the fifth grayscale being higher than the first grayscale and being lower than the second grayscale.