Driving voltage compensation method, gray scale compensation method and display device

A display device, including a display panel, a driving chip, a lighting module, a processor and a memory, wherein:

• the processor is configured for determining a gamma curve of the display panel, wherein the gamma curve is a corresponding curve of a gray scale voltage and a luminous brightness of a pixel;
• dividing the entire range of the gray scale voltage into at least two gray scale voltage ranges according to the gamma curve and determining test points in the respective gray scale voltage ranges;
• determining corresponding brightness values of the gray scale voltages corresponding to the test points in the gamma curve;
• wherein gray scale voltage compensation rules corresponding to different gray scale voltage ranges are different;
• the lighting module is configured for collecting the luminous brightness of the pixel;
• the driving chip is configured for driving the pixel in the display panel to emit light;
• the processor is further configured for obtaining actual gray scale voltages required when the luminous brightness of the pixel reaches the brightness values;
• deriving gray scale voltage compensation parameters corresponding to the respective gray scale voltage ranges according to a mapping relationship between the gray scale voltages of the test points in the respective gray scale voltage ranges and the actual gray scale voltages, and the gray scale voltage compensation rules of the gray scale voltage ranges, and storing the same to the memory;
• the driving chip is further configured for driving the pixel in the display panel to emit light after compensating the gray scale voltage of the pixel according to the gray scale voltage compensation parameters corresponding to the gray scale voltage ranges;
• and
• the memory is configured for storing a program required to implement functions of the processor, the gray scale voltage ranges corresponding to the respective pixels, the gray scale compensation rules corresponding to the respective gray scale voltage ranges and the gray scale compensation parameters in at least one gamma curve;
• wherein dividing the entire range of the gray scale voltage into at least two gray scale voltage ranges according to the gamma curve includes:
• determining a change trend of the gray scale voltage and the luminous brightness corresponding to the gamma curve;
• and
• sequentially dividing gray scale voltage into a first gray scale voltage range, a second gray scale voltage range and a third gray scale voltage range in an order from small to large, a gray scale compensation rule corresponding to the first gray scale voltage range is a quadratic function, and a gray scale compensation rule corresponding to the second gray scale voltage range is a linear function, and a gray scale voltage compensation rule corresponding to the third gray scale voltage range is a quadratic function.