HDR TELEVISION SET AND LOCAL DIMMING METHOD

摘要

Disclosed an HDR television and a method for regionally dimming, the HDR television including a display screen, an offset calculation module, a constant-current driving and controlling module, a plurality of constant-current driving circuits, a plurality of light bars, an image processing MCU, and a memory; the display screen is divided into a plurality of regions, and the plurality of light bars are respectively distributed in the plurality of display screen regions; the image processing MCU is configured to output a grayscale signal; the offset calculation module is configured to acquire brightness information of each region of the display screen, calculate a reference offset of each region according to the brightness information of each region, and store the reference offset in the memory; the constant-current driving and controlling module is configured to read the reference offset in the memory, convert into a multi-channel PWM control signal according to the reference offset and the grayscale signal, and respectively drive the plurality of constant-current driving circuits to output different constant current to light up the light bar of the corresponding region to illuminate the display. The technical solution of this disclosure improves the consistency of the television display.