Driving method of a backlight, driving device, backlight, display assembly and virtual reality apparatus
AssigneesBeijing Boe Optoelectronics Technology Co., Ltd., Boe Technology Group Co., Ltd.
InventorsTiankuo Shi, Lingyun Shi, Zhihua Ji, Chuanjun Liu, Guangquan Wang, Ming Chen
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Abstract
The preset disclosure provides a driving method of a backlight, a backlight driving device, a backlight, a display assembly and a virtual reality apparatus. The backlight includes multiple rows of light sources arranged in an array. The driving method includes: after a preset time has elapsed from receipt of a synchronous display signal for each frame of image, lighting the light sources row by row, wherein each row of light sources is successively lit at least twice.
Claims11
A driving method of a backlight, the backlight comprising multiple rows of light sources arranged in an array, the driving method comprising:
- after a preset time has elapsed from receipt of a synchronous display signal for each frame of display image, lighting the light sources row by row, wherein each row of light sources is successively lit at least twice,
- wherein a brightness of each row of light sources is changed progressively during the at least two successive lighting,
- wherein the backlight is divided into a plurality of preset regions, and the driving method comprises:
- acquiring, for each preset region, an average brightness value of a portion in a current frame of display image that corresponds to the preset region, as a first brightness value;
- acquiring an average brightness value of a portion in a previous frame of display image that corresponds to the preset region, as a second brightness value;
- and
- calculating a brightness difference between the first brightness value and the second brightness value, and, if the brightness difference is greater than a second brightness threshold, lighting the rows of light sources in the preset region successively with a progressively changing brightness;
- if the brightness difference is not greater than the second brightness threshold, lighting the rows of light sources in the preset region successively with a constant brightness.
A backlight driving device for a backlight, wherein the backlight comprises multiple rows of light source arranged in an array, and the backlight driving device comprising:
- a synchronizing circuit configured to receive a synchronous display signal for one frame of display image, and provide a backlight driving initial signal after a preset time has elapsed;
- a driving circuit configured to light the light sources row by row according to the backlight driving initial signal, wherein each row of light sources is successively lit at least twice,
- wherein the driving circuit is configured to control the brightness of each row of light sources change progressively during the at least two successive lighting,
- wherein the backlight is divided into a plurality of preset regions, and the driving circuit is configured to:
- acquire, for each preset region, an average brightness value of a portion in a current frame of display image that corresponds to the preset region, as a first brightness value;
- and
- acquire an average brightness value of a portion in a previous frame of display image that corresponds to the preset region, as a second brightness value;
- and
- calculate a brightness difference between the first brightness value and the second brightness value, and, if the brightness difference is greater than a second brightness threshold, light the rows of light sources in the preset region successively with a progressively changing brightness;
- if the brightness difference is not greater than the second brightness threshold, light the rows of light sources in the preset region successively with a constant brightness.
Dependencies are inferred from the claim text.