Display unit which converts the frame rate of image signal

A display unit comprising:

• a progressive conversion circuit which converts an input image signal into an image signal having a progressive scanning format when the input image signal has an interlacing scanning format;
• a frame rate conversion circuit which increases a frame rate of the image signal outputted from the progressive conversion circuit;
• an interlace conversion circuit capable of converting the image signal outputted from the frame rate conversion circuit into the image signal having an interlacing scanning format;
• and
• a display device which displays an image based on the image signal outputted from the interlace conversion circuit;
• wherein the interlace conversion circuit converts the image signal outputted from the frame rate conversion circuit into the image signal having the interlacing scanning format when the scanning frequency of the image signal outputted from the frame rate conversion circuit is higher than a predetermined value.

A display unit comprising:

• a display device having a plurality of scanning lines;
• a plurality of data lines intersecting with the scanning lines, and a plurality of electron emissive elements disposed at the intersections of the scanning lines and data lines;
• a progressive conversion circuit which converts an input image signal into an image signal having a progressive scanning format when the input image signal has an interlacing scanning format;
• a frame rate conversion circuit which increases the frame rate of the image signal outputted from the progressive conversion circuit;
• an interlace conversion circuit capable of converting the image signal outputted from the frame rate conversion circuit into an interlacing scanning format;
• a scan driver which supplies a selection signal for selecting at least one of the plurality of scanning lines to the scanning lines;
• a data driver which produces a driving signal based on the image signal outputted from the interlace conversion circuit and which supplies the driving signal to the data lines;
• and
• a controller which controls the conversion processing of scanning formats by the interlace conversion circuit in accordance with the scanning frequency of the image signal outputted from the frame rate conversion circuit and the output operation of the selection signal by the scan drivers.

A display unit, comprising:

• a frame rate conversion circuit which converts a frame rate of an input image signal;
• a display device which displays an image based on the image signal having the converted frame rate;
• and
• a display driver which controls operation frequency of the display device;
• wherein the frame rate conversion circuit changes the frame rate such that a frequency of processing required by the image signal having the converted frame rate is not higher than a maximum operation frequency of the display driver.

An image displaying method comprising the steps of:

• changing a frame rate of an input image signal having a non-interlacing scanning format;
• converting the image signal having the changed frame rate and the non-interlacing scanning format into an image signal having an interlacing scanning format when the scanning frequency of the image signal having the changed frame rate and the non-interlacing scanning format is higher than a predetermined value;
• and
• displaying an image based on the image signal having the interlacing scanning format.

An image displaying method comprising:

• converting an input image signal into an image signal having a progressive scanning format when the input image signal has an interlacing scanning format;
• increasing a frame rate of the image signal having the progressive scanning format;
• converting the image signal having the increased frame rate and the progressive scanning format into an image signal having an interlacing scanning format;
• and
• displaying an image based on the image signal having the interlacing scanning format at the increased frame rate;
• wherein the image signal having the increased frame rate is converted into the image signal having the interlacing scanning format when the scanning frequency of the image signal having the increased frame rate is higher than a predetermined value.

A method for displaying an image on a display device having a plurality of scanning lines, a plurality of data lines intersecting with the scanning lines, and a plurality of electron emissive elements disposed at the intersections of the scanning lines and data lines, comprising:

• converting an input image signal into an image signal having a progressive scanning format when the input image signal has an interlacing scanning format;
• increasing a frame rate of the image signal having the progressive scanning format;
• converting the image signal having the increased frame rate and the progressive scanning format into an image signal having an interlacing scanning format at the increased frame rate;
• supplying a selection signal for selecting at least one of the plurality of scanning lines to the scanning lines;
• producing a driving signal based on the image signal having the interlacing scanning format at the increased frame rate;
• supplying the driving signal to the data lines;
• and
• controlling the interlacing conversion processing in accordance with the scanning frequency of the image signal having the increased frame rate and the supplying operation of the selection signal.

An image displaying method, comprising:

• changing a frame rate of an input image signal;
• displaying an image on a display device based on the image signal having the converted frame rate;
• and
• controlling an operation frequency of the image signal having the converted frame rate so as not to be higher than a maximum operation frequency of the display driver.