Liquid crystal driving apparatus, image display apparatus, liquid crystal driving method, and liquid crystal driving program

An image display apparatus comprising:

• a liquid crystal element;
• and
• a liquid crystal driving apparatus configured to drive the liquid crystal element having a pixels,
• wherein the liquid crystal driving apparatus includes:
• a generator configured to generate sub-frames including a first sub-frame having first gradation value and a second sub-frame having second gradation value based on an input frame;
• and
• a driver configured to form a gradation in each of pixels of the liquid crystal element based on each gradation value in each of sub-frames by sequentially controlling an application of a first voltage and an application of a second voltage lower than the first voltage for the pixels in each of sub-field periods contained in one frame period,
• wherein the generator obtains the first gradation value by applying first gain to an input gradation value of the input frame and obtains the second gradation value by applying second gain to the input gradation value, and
• wherein the first gradation value is higher than the second gradation value and an average of the first gradation value and the second gradation value is equal to the input gradation value.

A liquid crystal driving method configured to drive a liquid crystal element having pixels, the liquid crystal driving apparatus method comprising the steps of:

• generating sub-frames including a first sub-frame having first gradation value and a second sub-frame having second gradation value based on an input frame;
• and
• forming a gradation in each of pixels of the liquid crystal element based on each gradation value in each of sub-frames by sequentially controlling an application of a first voltage and an application of a second voltage lower than the first voltage for the pixels in each of sub-field periods contained in one frame period,
• wherein the first gradation value is obtained by applying first gain to an input gradation value of the input frame and the second gradation value is obtained by applying second gain to the input gradation value, and
• wherein the first gradation value is higher than the second gradation value and an average of the first gradation value and the second gradation value is equal to the input gradation value.

A non-transitory computer-readable storage medium for storing a program that enables a computer to execute a liquid crystal driving method configured to drive a liquid crystal element having pixels, the liquid crystal driving apparatus method comprising the steps of:

• generating sub-frames including a first sub-frame having first gradation value and a second sub-frame having second gradation value based on an input frame;
• and
• forming a gradation in each of pixels of the liquid crystal element based on each gradation value in each of sub-frames by sequentially controlling an application of a first voltage and an application of a second voltage lower than the first voltage for the pixels in each of sub-field periods contained in one frame period,
• wherein the first gradation value is obtained by applying first gain to an input gradation value of the input frame and the second gradation value is obtained by applying second gain to the input gradation value, and
• wherein the first gradation value is higher than the second gradation value and an average of the first gradation value and the second gradation value is equal to the input gradation value.