Liquid crystal display device, signal processing unit for use in liquid crystal display device, program and storage medium thereof, and liquid crystal display control method

A signal processing unit for use in a liquid crystal display device, the signal processing unit including conversion means which converts an interlaced video signal into a progressive video signal and modulating the progressive video signal so as to emphasize grayscale transition in each pixel of the liquid crystal display device,

• wherein the conversion means is capable of conversions by two or more conversion methods, and
• a degree of the grayscale transition emphasis is changed in accordance with a conversion method used by the conversion means.

A liquid crystal display device having an I/P conversion means which, when incoming video data is an interlaced signal, converts the interlaced signal into a progressive signal in accordance with any one of two or more conversion methods,

• said liquid crystal display device, carrying out emphasis conversion on video data supplied to a liquid crystal display panel in accordance with at least video data of previous vertical period and video data of current vertical period, so as to emphasize grayscale transition at least from previous vertical period to current vertical period in the progressive signal, thereby compensating for optical response properties of the liquid crystal display panel, and
• controlling a degree of the emphasis conversion on the video data so as to be changed in accordance with which kind of conversion method among the two or more conversion methods is used for the conversion.

A program causing a computer to execute a process of controlling a degree of emphasis conversion on video data so as to be changed in accordance with which kind of conversion method among two or more conversion methods is used for the conversion,

• the computer controlling a liquid crystal display device comprising:
• an I/P conversion means which, when incoming video data is an interlaced signal, converts the interlaced signal into a progressive signal in accordance with any one of two or more conversion methods;
• and emphasis conversion means which carries out emphasis conversion on video data of current vertical period so as to emphasize grayscale transition at least from previous vertical period to current vertical period in the progressive signal, and the liquid crystal display device carrying out emphasis conversion on video data supplied to a liquid crystal display panel in accordance with at least video data of previous vertical period and video data of current vertical period, thereby compensating for optical response properties of the liquid crystal display panel.

A program causing a computer comprising:

• conversion means which converts an interlaced video signal into a progressive video signal;
• and correction means which corrects a video signal of a current vertical period so as to emphasize grayscale transition at least from current vertical period to previous vertical period in the progressive video signal, wherein the conversion means is capable of conversions by two or more conversion methods,
• to operate so as to change a degree of grayscale transition emphasis performed by the correction means in accordance with a conversion method used by the conversion means.

A liquid crystal display control method of including a conversion step of converting an interlaced video signal into a progressive video signal, and modulating the progressive video signal so as to emphasize grayscale transition in each pixel of a liquid crystal display device,

• wherein conversions by two or more conversion methods are possible in the conversion step, and
• a degree of the grayscale transition emphasis is changed in accordance with a conversion method used in the conversion step.

A liquid crystal display control method including an I/P conversion step of, when incoming video data is an interlaced signal, converting the interlaced signal into a progressive signal in accordance with any one of two or more conversion methods,

• said method carrying out emphasis conversion on video data supplied to a liquid crystal display panel in accordance with at least video data of previous vertical period and video data of current vertical period, so as to emphasize grayscale transition at least from previous vertical period to current vertical period in the progressive signal, thereby compensating for optical response properties of the liquid crystal display panel, wherein
• a degree of the emphasis conversion on the video data is controlled so as to be changed in accordance with which kind of conversion method among the two or more conversion methods is used for the conversion.