Monitor calibration device and method, and monitor control circuit and method

A monitor calibration device, comprising:

• a luminance measurement device configured to measure a first luminance and a second luminance of a monitor;
• a memory configured to store a plurality of program codes or program instructions;
• and
• a calculation circuit coupled to the luminance measurement device and the memory and configured to execute the program codes or program instructions to perform following steps:
• (A) determining a range of a product of a reflectance of the monitor and an ambient light intensity;
• (B) determining a first product and a second product from the range of the product according to the range of the product, the first luminance, and the second luminance;
• (C) generating a first brightness curve according to the first luminance, the second luminance, and the first product;
• (D) generating a second brightness curve according to the first luminance, the second luminance, and the second product;
• (E) generating a third brightness curve corresponding to a third product according to the first brightness curve, the second brightness curve, the first product, and the second product, the third product being between the first product and the second product;
• and
• (F) determining whether the third brightness curve meets a target condition;
• wherein when the third brightness curve meets the target condition, the first brightness curve and the second brightness curve are used to calibrate the monitor.