Gamma debugging method and apparatus

A gamma debugging method, comprising:

• acquiring a duty cycle and gamma data corresponding to a first display brightness level and a duty cycle and gamma data corresponding to a second display brightness level in a pulse-width modulation (PWM) dimming interval;
• wherein the first display brightness level is a maximum display brightness level in the PWM dimming interval, and the second display brightness level is a minimum display brightness level in the PWM dimming interval, or the first display brightness level is a minimum display brightness level in the PWM dimming interval, and the second display brightness level is a maximum display brightness level in the PWM dimming interval;
• according to the duty cycle and the gamma data corresponding to the first display brightness level, and the duty cycle corresponding to the second display brightness level, or according to the duty cycle and the gamma data corresponding to the first display brightness level, and the gamma data corresponding to the second display brightness level, determining maximum brightness corresponding to an inserted display brightness level and a duty cycle corresponding to the inserted display brightness level;
• determining whether a binding-point grayscale of a plurality of binding-point grayscales at the inserted display brightness level is greater than a preset grayscale threshold, in response to a determination result that the binding-point grayscale at the inserted display brightness level is greater than the preset grayscale threshold, calculating, according to a preset calculation formula, a gamma register value corresponding to the binding-point grayscale at the inserted display brightness level;
• wherein the preset grayscale threshold is determined by a difference value distribution between an actual gamma register value obtained by actually performing gamma debugging with a preset number of display modules at the inserted display brightness level and a calculated gamma register value calculated according to an initial linear calculation formula;
• and the preset calculation formula is performed as a formula obtained by correcting the initial linear calculation formula according to the difference value distribution;
• and wherein the initial linear calculation formula satisfies the following condition:
• for a determined binding-point grayscale of the plurality of binding-point grayscales at the inserted display brightness level, the calculated gamma register value calculated according to the initial linear formula is between a gamma register value corresponding to the determined binding-point grayscale at the minimum display brightness level and a gamma register value corresponding to the determined binding-point grayscale at the maximum display brightness level.