Display device having display area with adjustable brightness, and driving method thereof, driving device for driving the same, and display apparatus including the same

1 . A display device, comprising a display panel and a backlight source sequentially stacked, wherein

the backlight source is on a light incidence side of the display panel;

the display device is divided into at least one display area,

the display panel is divided into at least one display unit,

the backlight source is divided into at least one backlight unit;

the display area at least comprises one of the at least one display unit and one of the at least one backlight unit;

each backlight unit at least corresponds to one display unit; the backlight unit is configured to provide a light source for the display unit; and

in the display area, a grayscale voltage of the display unit and a luminance of the backlight unit are adjustable,

wherein the display device further comprises a processor configured to adjust the grayscale voltage of the display unit and the luminance of the backlight unit by determining a to-be-displayed grayscale voltage of the display unit and the luminance of the backlight unit according to a to-be-displayed grayscale,

wherein the processor is further configured to:

determine whether the to-be-displayed grayscale is lower than a low grayscale threshold; and

determine the to-be-displayed grayscale voltage according to a grayscale mapping relationship and a first mapping relationship in response to the to-be-displayed grayscale being lower than the low grayscale threshold, wherein in the grayscale mapping relationship, a plurality of low grayscales lower than the low grayscale threshold are mapped to at least one high grayscale not lower than the low grayscale threshold, and in the first mapping relationship, grayscales are mapped to grayscale voltages in one-to-one correspondence based on a photoelectric conversion curve;

adjust the grayscale voltage of the display unit by using the determined to-be-displayed grayscale voltage to increase color gamut of at least one display area, and

adjust the luminance of the backlight unit according to the to-be-displayed grayscale and the adjusted grayscale voltage such that the display area displays a luminance corresponding to the to-be-displayed grayscale.

2 . The display device of claim 1 , wherein each display area is provided with only one pixel, and each backlight unit corresponds to only one pixel.

3 . A driving method of a display device, wherein the display device comprises a display panel and a backlight source sequentially stacked, the backlight source is on a light incidence side of the display panel; the display device is divided into at least one display area, the display panel is divided into at least one display unit, the backlight source is divided into at least one backlight unit; the display area at least comprises one of the at least one display unit and one of the at least one backlight unit; each backlight unit at least corresponds to one display unit and configured to provide a light source for the display unit; and in the display area, the driving method comprises:

determining a to-be-displayed grayscale of a to-be-displayed image area corresponding to the display area, wherein a to-be-displayed image is divided into at least one to-be-displayed image area, and each to-be-displayed image area corresponds to one display area; and

adjusting grayscale voltage of the display unit and a luminance of the backlight unit by determining a to-be-displayed grayscale voltage of the display unit and the luminance of the backlight unit according to a to-be-displayed grayscale,

wherein adjusting the grayscale voltage of the display unit and the luminance of the backlight unit comprises:

determining whether the to-be-displayed grayscale is lower than a low grayscale threshold; and

determining the to-be-displayed grayscale voltage according to a grayscale mapping relationship and a first mapping relationship in response to the to-be-displayed grayscale being lower than the low grayscale threshold, wherein in the grayscale mapping relationship, a plurality of low grayscales lower than the low grayscale threshold are mapped to at least one high grayscale not lower than the low grayscale threshold, and in the first mapping relationship, grayscales are mapped to grayscale voltages in one-to-one correspondence based on a photoelectric conversion curve;

adjusting the grayscale voltage of the display unit by using the determined to-be-displayed grayscale voltage to increase color gamut of at least one display area, and

adjusting the luminance of the backlight unit according to the to-be-displayed grayscale and the adjusted grayscale voltage such that the display area displays a luminance corresponding to the to-be-displayed grayscale.

4 . The driving method according to claim 3 , wherein in the grayscale mapping relationship, the plurality of low grayscales are mapped to a first target grayscale, the first target grayscale being the high grayscale; and the method further comprises

determining a grayscale voltage corresponding to the first target grayscale in a first mapping relationship as the to-be-displayed grayscale voltage.

5 . The driving method according to claim 3 , wherein in the grayscale mapping relationship, the plurality of low grayscales are mapped to a plurality of second target grayscales in one-to-one correspondence, and the plurality of second target grayscales are high grayscales, and the larger the value of the low grayscale, the larger the value of a corresponding second target grayscale; and the method comprises:

determining a grayscale voltage corresponding to the second target grayscale corresponding to the to-be-displayed grayscale in the first mapping relationship as the to-be-displayed grayscale voltage.

6 . The driving method according to claim 3 , the method further comprises:

determining a grayscale voltage corresponding to the to-be-displayed grayscale in a first mapping relationship as the to-be-displayed grayscale voltage, in response to the to-be-displayed grayscale being not lower than the low grayscale threshold.

7 . The driving method according to claim 3 , wherein adjusting the luminance of the backlight unit according to the to-be-displayed grayscale and the to-be-displayed grayscale voltage comprises:

determining a duty ratio of pulse width modulation (PWM) of a to-be-displayed grayscale according to the to-be-displayed grayscale and the to-be-displayed grayscale voltage to determine the luminance of the backlight unit.

8 . The driving method according to claim 7 , wherein determining the duty ratio of pulse width modulation of the to-be-displayed grayscale according to the to-be-displayed grayscale and the to-be-displayed grayscale voltage comprises:

performing fitting according to a corresponding relationship between the grayscale, the grayscale voltage and a duty ratio of pulse width modulation to determine the duty ratio of pulse width modulation of the to-be-displayed grayscale.

9 . A driving device applied to a display device, wherein the display device comprises a display panel and a backlight source sequentially stacked, the backlight source is on a light incidence side of the display panel; the display device is divided into at least one display area, the display panel is divided into at least one display unit, the backlight source is divided into at least one backlight unit; the display area at least comprises one of the at least one display unit and one of the at least one backlight unit; each backlight unit at least corresponds to one display unit; the backlight unit is configured to provide a light source for the display unit; and the driving device is configured to perform the driving method of claim 3 to drive the display device.

10 . A display apparatus, comprising a display device and a driving device,

wherein the display device comprise a display panel and a backlight source sequentially stacked, wherein

the backlight source is on a light incidence side of the display panel;

the display device is divided into at least one display area,

the display panel is divided into at least one display unit,

the backlight source is divided into at least one backlight unit;

the display area at least comprises one of the at least one display unit and one of the at least one backlight unit;

each backlight unit at least corresponds to one display unit; the backlight unit is configured to provide a light source for the display unit; and

in the display area, a grayscale voltage of the display unit and a luminance of the backlight unit are adjustable,

wherein the driving device is configured to perform a driving method comprising:

determining a to-be-displayed grayscale of a to-be-displayed image area corresponding to the display area, wherein a to-be-displayed image is divided into at least one to-be-displayed image area, and each to-be-displayed image area corresponds to one display area; and

determining a to-be-displayed grayscale voltage of the display unit and a luminance of the backlight unit according to the to-be-displayed grayscale,

wherein determining the to-be-displayed grayscale voltage of the display unit and the luminance of the backlight unit according to the to-be-displayed grayscale comprises:

determining whether a to-be-displayed grayscale is lower than a low grayscale threshold;

determining a to-be-displayed grayscale voltage according to a grayscale mapping relationship and a first mapping relationship in response to the to-be-displayed grayscale being lower than the low grayscale threshold, wherein in the grayscale mapping relationship, a plurality of low grayscales lower than the low grayscale threshold are mapped to at least one high grayscale not lower than the low grayscale threshold, and in the first mapping relationship, grayscales are mapped to grayscale voltages in one-to-one correspondence based on a photoelectric conversion curve;

adjusting the grayscale voltage of the display unit by using the determined to-be-displayed grayscale voltage to increase color gamut of at least one display area, and

adjusting the luminance of the backlight unit according to the to-be-displayed grayscale and the adjusted grayscale voltage such that the display area displays a luminance corresponding to the to-be-displayed grayscale.