Method and device for adjusting grayscale of display panel

A device for adjusting grayscale of display panel, wherein the display panel is a liquid crystal display panel including a common electrode and a pixel electrode, and the device comprises:

• an image acquiring module, being configured to obtain a current image by acquiring image from the display panel;
• an identifying module, being configured to identify an nonuniform block in the current image, and detect original output brightness and original input grayscale of the nonuniform block;
• a computing module, being configured to determine a target input grayscale corresponding to a preset target brightness according to an actual Gamma curve value, wherein the actual Gamma curve value is obtained by testing the display panel;
• a first adjusting module, being configured to take a difference between the original input grayscale and the target input grayscale as a grayscale compensation value of the nonuniform block;
• an acquiring module, being configured to acquire a plurality of sampling grayscale voltages and a specific grayscale voltage in accordance with the actual Gamma curve when applying an initial common voltage to the common electrode;
• a second adjusting module, being configured to adjust the voltage applied to the common electrode, to acquire a common voltage by the acquiring module at which a flicker value of a display screen is minimized when the specific grayscale voltage is applied to the pixel electrode, and take the common voltage as an actual common voltage;
• a detecting module, being configured to determine a flicker value;
• and
• a third adjusting module, being configured to respectively adjust at least one of the acquired sampling grayscale voltages when the actual common voltage is applied to the common electrode, and determine a flicker value by detecting module of the corresponding display screen and taking the grayscale voltage corresponding to the minimum flicker value of the display screen as the Gamma reference voltage corresponding to the grayscale.

A display device, comprising:

• a display panel;
• and
• the device for adjusting grayscale of display panel, wherein the device comprises:
• an image acquiring module, being configured to obtain a current image by acquiring image from the display panel;
• an identifying module, being configured to identify an nonuniform block in the current image, and detect original output brightness and original input grayscale of the nonuniform block;
• a computing module, being configured to determine a target input grayscale corresponding to a preset target brightness according to an actual Gamma curve value, wherein the actual Gamma curve value is obtained by testing the display panel;
• a first adjusting module, being configured to take a difference between the original input grayscale and the target input grayscale as a grayscale compensation value of the nonuniform block;
• an acquiring module, being configured to acquire a plurality of sampling grayscale voltages and a specific grayscale voltage in accordance with the actual Gamma curve when applying an initial common voltage to the common electrode;
• a second adjusting module, being configured to adjust the voltage applied to the common electrode, to acquire a common voltage by the acquiring module at which a flicker value of a display screen is minimized when the specific grayscale voltage is applied to the pixel electrode, and take the common voltage as an actual common voltage;
• a detecting module, being configured to determine a flicker value;
• and
• a third adjusting module, being configured to respectively adjust at least one of the acquired sampling grayscale voltages when the actual common voltage is applied to the common electrode, and determine a flicker value by detecting module of the corresponding display screen and taking the grayscale voltage corresponding to the minimum flicker value of the display screen as the Gamma reference voltage corresponding to the grayscale.