Display device, control method and computer program for display device

1. A display device which has a display section in which pixels which have light emitting elements for emitting light according to a current amount and pixel circuits for controlling an electric current applied to the light emitting elements according to video signals, scanning lines which supply selection signals for selecting the pixels for emitting light to the pixels in a predetermined scanning cycle, and data lines which supply the video signals to the pixels are arranged into a matrix pattern, the display device comprising:

a light emission amount detecting section configured to detect an amount of light emission from video signals;

a light emitting time calculating section configured to calculate a light emitting time of the light emitting elements based on the amount of light emission detected by the light emission amount detecting section;

a recording section configured to include (a) a section in which predetermined luminance information is stored and (b) a light emitting time recording section configured to record the calculated light emitting time;

a luminance acquiring section configured to acquire the predetermined luminance information of the light emitting elements by using the light emitting time recorded in the light emitting time recording section to retrieve the predetermined luminance information from the recording section;

a coefficient calculating section configured to calculate coefficients by which the video signals are multiplied based on the predetermined luminance information acquired by the luminance acquiring section; and

a coefficient multiplying section configured to multiply the video signals by the coefficients calculated by the coefficient calculating section.

2. The display device according to claim 1 , further comprising a linear converting section which is configured to convert video signals having gamma property into the video signals having linear property.

3. The display device according to claim 1 , further comprising a gamma converting section which is configured to convert output signals having linear property in the coefficient multiplying section into signals having gamma property.

4. The display device according to claim 1 , wherein

the light emission amount detecting section is configured to detect the amount of light emission in a plurality of regions on the screen, and

the signal level correcting section is configured to correct the amount of light emission according to the region where luminance is the lowest.

5. The display device according to claim 4 , wherein the light emission amount detecting section moves up and down so as to detect the amount of light emission.

6. A display device which has a display section in which pixels which have light emitting elements for emitting light according to a current amount and pixel circuits for controlling an electric current applied to the light emitting elements according to video signals, scanning lines which supply selection signals for selecting the pixels for emitting light to the pixels in a predetermined scanning cycle, and data lines which supply the video signals to the pixels are arranged into a matrix pattern, the display device comprising:

a light emission amount detecting section configured to detect an amount of light emission from video signals having a linear property;

a light emitting time calculating section configured to calculate a light emitting time of the light emitting elements based on the amount of light emission detected by the light emission amount detecting section;

a light emitting time recording section configured to record the calculated light emitting time;

a luminance acquiring section configured to acquire luminance information of the light emitting elements using the light emitting time recorded in the light emitting time recording section;

a coefficient calculating section configured to calculate coefficients by which the video signals are multiplied based on the luminance information acquired by the luminance acquiring section; and

a coefficient multiplying section configured to multiply the video signals by the coefficients calculated by the coefficient calculating section,

wherein,

the coefficient calculating section calculates coefficients for adjusting luminance of the other colors according to a luminance of a color with the lowest luminance as a result of acquiring the luminance information in the luminance acquiring section.

7. A control method for display device, the display device having a display section in which pixels which have light emitting elements for emitting light according to a current amount and pixel circuits for controlling an electric current applied to the light emitting elements according to video signals, scanning lines which supply selection signals for selecting the pixels for emitting light to the pixels in a predetermined scanning cycle, and data lines which supply the video signals to the pixels are arranged into a matrix pattern, the control method comprising the steps of:

receiving video signals having a linear property and detecting an amount of light emission;

calculating light emitting time based on the amount of light emission detected at the light emission amount detecting step;

recording the calculated light emitting time in a recording section that also stores predetermined luminance information;

acquiring the predetermined luminance information of the light emitting elements by using the calculated light emitting time to retrieve the predetermined luminance information from the recording section, said predetermined luminance information being based on a relationship between the light emitting time recorded at the light emitting time recording step and the luminance of the light emitting elements;

calculating coefficients by which the video signals are multiplied based on the predetermined luminance information acquired at the luminance acquiring step; and

multiplying the video signals by the coefficients calculated at the coefficient calculating step.

8. A non-transitory computer readable medium having a computer program stored thereon, said computer program, when executed, enables a computer to control a display device having a display section in which pixels which have light emitting elements for emitting light according to a current amount and pixel circuits for controlling an electric current applied to the light emitting elements according to video signals, scanning lines which supply selection signals for selecting the pixels for emitting light to the pixels in a predetermined scanning cycle, and data lines which supply the video signals to the pixels are arranged into a matrix pattern, the computer program comprising the steps of:

inputting video signals having a linear property and detecting an amount of light emission;

calculating light emitting time based on the amount of light emission detected at the light emission amount detecting step;

recording the calculated light emitting time in a recording section that also stores predetermined luminance information;

acquiring the predetermined luminance information of the light emitting elements by using the calculated light emitting time to retrieve the predetermined luminance information from the recording section, said predetermined luminance information being based on a relationship between the light emitting time recorded at the light emitting time recording step and the luminance of the light emitting elements;

calculating coefficients by which the video signals are multiplied based on the predetermined luminance information acquired at the luminance acquiring step; and

multiplying the video signals by the coefficients calculated at the coefficient calculating step.