Method of driving a light source, method of displaying an image using the same, and display apparatus for performing the same

A method of driving a light source, comprising:

• converting a reference luminance value of the light source to a first lust noticeable difference (JND) value, JND values representing a minimum noticeable difference between two stimuli;
• determining a target luminance value using the first JND value, the target luminance value being lower than the reference luminance value;
• generating a first driving signal using the target luminance value, the first driving signal to be applied to the light source;
• generating a second driving signal using the reference luminance value, the second driving signal to be applied to the light source;
• and
• outputting the first driving signal and the second driving signal according to a power source mode.

A method of displaying an image, comprising:

• analyzing an input image to compensate a color temperature of the input image;
• displaying the compensated input image on a display panel;
• converting a reference luminance value of a light source to a first just noticeable difference (JND) value, the light source configured to provide light to the display panel, and JND values representing a minimum noticeable difference between two stimuli;
• determining a second JND value by subtracting a JND reference value from the first JND value, the JND reference value being determined based on a time required for a human to notice a luminance change according to a JND value;
• determining a target luminance value that is less than the reference luminance value using the second JND value;
• generating a first driving signal using the target luminance value and applying the first driving signal to the light source;
• and
• providing the light to the display panel in response to the first driving signal.

A method of displaying an image, comprising:

• analyzing an input image to compensate a color temperature of the input image;
• compensating a color temperature of the input image by increasing the color temperature of an achromatic color image comprising a grayscale greater than or equal to a reference grayscale when a ratio of the achromatic color image in the input image is greater than a reference ratio;
• displaying the compensated input image on a display panel;
• converting a reference luminance value of a light source to a first lust noticeable difference (JND) value, the light source configured to provide light to the display panel, and JND values representing a minimum noticeable difference between two stimuli;
• determining a target luminance value lower than the reference luminance value using the first JND value;
• generating a first driving signal using the target luminance value and applying the first driving signal to the light source;
• and
• providing the light to the display panel in response to the first driving signal.

A method of displaying an image, comprising:

• analyzing an input image to compensate a color temperature of the input image;
• displaying the compensated input image on a display panel;
• converting a reference luminance value of a light source to a first just noticeable difference (JND) value, the light source configured to provide light to the display panel, and JND values representing a minimum noticeable difference between two stimuli;
• determining a target luminance value lower than the reference luminance value using the first JND value;
• generating a first driving signal using the target luminance value and applying the first driving signal to the light source;
• generating a second driving signal using the reference luminance value, the second driving signal to be applied to the light source;
• outputting the first driving signal and the second driving signal according to a power source mode;
• and
• providing the light to the display panel in response to the first driving signal and the second driving signal.

A display apparatus, comprising:

• a display panel to display an image;
• a light source part comprising a light source configured to provide light to the display panel;
• a luminance determining part to convert a reference luminance value of the light source to a first just noticeable difference (JND) value, to determine a second JND value by subtracting a JND reference value from the first JND value, and to determine a target luminance value using the second JND value, the target luminance value being lower than the reference luminance value, and the JND values representing a minimum noticeable difference between two stimuli;
• and
• a light source driver to generate a first driving signal corresponding to the target luminance value and to apply the first driving signal to the light source,
• wherein the JND reference value is determined based on a time required for a human to notice a luminance change according to a JND value.

A display apparatus comprising:

• a display panel to display an image;
• a light source part comprising a light source configured to provide light to the display panel;
• a luminance determining part to convert a reference luminance value of the light source to a first lust noticeable difference (JND) value and to determine a target luminance value using the first JND value, the target luminance value being lower than the reference luminance value, and JND values representing a minimum noticeable difference between two stimuli;
• and
• a light source driver to generate a first driving signal corresponding to the target luminance value and to apply the first driving signal to the light source;
• and
• a light source controller to output the reference luminance value and the target luminance value to the light source driver according to a power source mode,
• wherein the light source driver generates a second driving signal corresponding to the reference luminance value.