Signal processing device, signal processing method, and display device

A signal processing method comprising:

• by a signal processing apparatus, acquiring information regarding luminance enhancement time obtained by measuring time for enhancing luminance on a display panel and a temperature rise amount of the display panel, when increasing luminance of the video signal from a low-luminance display signal to a high-luminance display signal;
• adaptively controlling a first gain for enhancing the luminance of the video signal, according to a degree of influence on a temperature rise of the display panel, in reference to the acquired information;
• calculating an integration step value according to a level of the video signal, the integration step value being a negative integration step value in a low-value region at input video signal values below a threshold input video signal level and a positive integration step value in a high-value region at input video signal values above the threshold input video signal level;
• integrating the calculated integration step value in a time axis direction to calculate an integrated value according to the luminance enhancement time;
• and
• applying the calculated integrated value to assist in controlling the first gain for enhancing the luminance of the video signal.

A display device comprising:

• a signal processing apparatus that processes a video signal;
• a display panel that displays video corresponding to the video signal;
• and circuitry of the signal processing apparatus that is configured to
• acquire information regarding luminance enhancement time obtained by measuring time for enhancing luminance on a display panel and a temperature rise amount of the display panel, when increasing luminance of the video signal from a low-luminance display signal to a high-luminance display signal,
• adaptively control a first gain for enhancing the luminance of the video signal, according to a degree of influence on a temperature rise of the display panel, in reference to the acquired information, and
• calculate an integration step value according to a level of the video signal, the integration step value being a negative integration step value in a low-value region at input video signal values below a threshold input video signal level and a positive integration step value in a high-value region at input video signal values above the threshold input video signal level,
• integrate the calculated integration step value in a time axis direction to calculate an integrated value according to the luminance enhancement time, and
• apply the calculated integrated value to assist in controlling the first gain for enhancing the luminance of the video signal.