Display device driving method and display device
AssigneeTcl China Star Optoelectronics Technology Co., Ltd.
InventorsXin Zhang, Dan Cao, Tao He
Life of this patent
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Abstract
A display device driving method and the display device are provided. The display device driving method determines a driving voltage value of each backlight unit based on a content to be displayed by a display unit corresponding to each backlight unit, achieving dynamic adjustment of luminous brightness of the backlight unit according to the display content of the corresponding display unit. Meanwhile, the driving voltage value is related to a noise in an image. Therefore, a better backlight brightness value can be obtained by reducing an influence of the noise on the adjustment of the luminous brightness.
Claims16
A display device driving method, wherein the display device comprises a backlight module, a liquid crystal display panel, and a main control chip, the backlight module comprises a first driving chip, the liquid crystal display panel comprises a second driving chip, a backlight source of the backlight module comprises a plurality of backlight units arranged in an array and a driving circuit corresponding to each of the backlight units, the liquid crystal display panel comprises a plurality of display units arranged in an array, each of the display units comprises a plurality of pixels, the plurality of backlight units are in a one-to-one correspondence with the plurality of display units, and the display device driving method comprises following steps:
- the main control chip acquiring a brightness data of each of the pixels of a target display unit when displaying a target display frame, determining a noise data of an image to be displayed of the target display unit when displaying the target display frame according to the brightness data of each of the pixels of the target display unit, and determining a target brightness value of a target backlight unit corresponding to the target display unit when displaying the target display frame according to the brightness data of each of the pixels of the target display unit and the noise data of the image to be displayed of the target display unit;
- the main control chip determining a driving voltage value of the target backlight unit when displaying the target display frame according to the target brightness value of the target backlight unit corresponding to the target display unit when displaying the target display frame, and sending the driving voltage value to the first driving chip;
- the main control chip determining a driving voltage value of each of the pixels of the target display unit when displaying the target display frame according the brightness data of each of the pixels of the target display unit when displaying the target display frame, and sending the driving voltage value to the second driving chip;
- the first driving chip driving each of the backlight units of the backlight module to emit light according to the driving voltage value of the target backlight unit when displaying the target display frame;
- and
- the second driving chip driving each of the pixels of each of the display units of the liquid crystal display panel to transmit light according to the driving voltage value of each of the pixels of the target display unit when displaying the target display frame;
- wherein
- the step of determining the noise data of the image to be displayed of the target display unit when displaying the target display frame according to the determining method of the noise data corresponding to the target display unit and the total brightness value of all of the pixels of each of the traversal blocks further comprises:
- setting the noise data of the image to be displayed by the target display unit to a first value when a sum of brightness values of all of the pixels in all of the traversal blocks is less than a first threshold;
- setting the noise data of the image to be displayed by the target display unit to a second value when the sum of the brightness values of all of the pixels in any one traversal block is greater than a second threshold;
- and
- setting the noise data of the image to be displayed by the target display unit to a third value when the sum of brightness values of all of the pixels in all of the traversal blocks is less than the second threshold, and the sum of brightness values of all of the pixels in any one traversal block is greater than the first threshold;
- wherein
- the step of setting the noise data of the image to be displayed by the target display unit to the third value comprises:
- filtering all of the traversal blocks to find a target traversal block which the sum of the brightness values of all of the pixels is less than the second threshold and greater than the first threshold;
- and
- determining the third value according to the sum of the brightness values of the target traversal block.
A display device, comprising a backlight module, a liquid crystal display panel, and a main control chip, the backlight module comprising a first driving chip, the liquid crystal display panel comprising a second driving chip, a backlight source of the backlight module comprising a plurality of backlight units arranged in an array and a driving circuit corresponding to each of the backlight units, the liquid crystal display panel comprises a plurality of display units arranged in an array, each of the display units comprises a plurality of pixels, and the plurality of backlight units are in a one-to-one correspondence with the plurality of display units, wherein:
- the main control chip acquires a brightness data of each of the pixels of a target display unit when displaying a target display frame, determines a noise data of an image to be displayed of the target display unit when displaying the target display frame according to the brightness data of each of the pixels of the target display unit, determines a target brightness value of a target backlight unit corresponding to the target display unit when displaying the target display frame according to the brightness data of each of the pixels of the target display unit and the noise data of the image to be displayed of the target display unit, determines a driving voltage value of the target backlight unit when displaying the target display frame according to the target brightness value of the target backlight unit corresponding to the target display unit when displaying the target display frame, and sends the driving voltage value to the first driving chip, and determines a driving voltage value of each of the pixels of the target display unit when displaying the target display frame according the brightness data of each of the pixels of the target display unit when displaying the target display frame, and sends the driving voltage value to the second driving chip;
- the first driving chip drives each of the backlight units of the backlight module to emit light according to the driving voltage value of the target backlight unit when displaying the target display frame;
- and
- the second driving chip drives each of the pixels of each of the display units of the liquid crystal display panel to transmit light according to the driving voltage value of each of the pixels of the target display unit when displaying the target display frame;
- wherein
- the main control chip is configured to:
- set the noise data of the image to be displayed by the target display unit to a first value when a sum of brightness values of all of the pixels in all of the traversal blocks is less than a first threshold;
- set the noise data of the image to be displayed by the target display unit to a second value when the sum of the brightness values of all of the pixels in any one traversal block is greater than a second threshold;
- and
- set the noise data of the image to be displayed by the target display unit to a third value when the sum of brightness values of all of the pixels in all of the traversal blocks is less than the second threshold, and the sum of brightness values of all of the pixels in any one traversal block is greater than the first threshold;
- wherein
- the main control chip is configured to:
- filter all of the traversal blocks to find a target traversal block which the sum of the brightness values of all of the pixels is less than the second threshold and greater than the first threshold;
- and
- determine the third value according to the sum of the brightness values of the target traversal block.
Dependencies are inferred from the claim text.