Video control device and video control method

A video control device for a hold-type display, comprising:

• a data acquisition unit configured to acquire first frame data having a first frame rate;
• a delay memory configured to temporarily hold the first frame data and output second frame data obtained by delaying the first frame data;
• one or a plurality of interpolation units configured to generate one or a plurality of sets of interpolated frame data located between adjacent frames in the first frame data by using the first frame data and the second frame data;
• a plurality of quantization units configured to quantize data of each pixel of the first frame data and data of each pixel of the second frame data with different logical formulae and generate third frame data with a predetermined number of bits deleted;
• a frame memory configured to temporarily hold the third frame data;
• a frame controller configured to control reading of the fourth frame data from the frame memory to cause the fourth frame data to repeatedly output sequentially from the frame memory at a second frame rate higher than the first frame rate;
• and
• an alternating signal generating unit configured to alternately output a first signal and a second signal, which is obtained by inverting the first signal, in accordance with the first frame rate;
• wherein
• the quantization units each have 2L logical formulae where L is a positive integer and changes the logical formulae according to the first and second signals.

A video control method for a hold-type display, comprising:

• acquiring first frame data having a first frame rate;
• quantizing data of each pixel constituting the first frame data by a first logical formula to generate a second frame data with a predetermined number of lower bits deleted;
• temporarily holding the second frame data and outputting third frame data obtained by delaying the second frame data;
• generating one or a plurality of sets of interpolated frame data located between adjacent frames in the second frame data by using the second frame data and the third frame data;
• quantizing data of each pixel constituting the first frame data or the interpolated frame data by a second logical formula different from the first logical formula to generate a fourth frame data with a predetermined number of lower bits deleted;
• and
• temporarily holding the fourth frame data and the interpolated frame data in a frame memory and repeatedly outputting the fourth frame data and the interpolated frame data sequentially from the frame memory at a second frame rate higher than the first frame rate,
• wherein the ratio of the second frame rate to the first frame rate is 2M where M is the number of deleted lower bits.