Display apparatus having display panel and humidity detection method thereof and gamma curve calibration method thereof

A display apparatus, comprising:

• a light source for providing an incident light;
• a display panel for displaying a test pattern, wherein the incident light is projected to the test pattern of the display panel to generate a diffraction light;
• a light detector for detecting the diffraction light to generate a detection result;
• and
• a controller, coupled to the display panel and the light detector, for obtaining a humidity information of the display panel according to the detection result of the light detector, wherein
• the controller adjusts at least one driving voltage of the display panel and learns a light intensity of the diffraction light according to the detection result provided by the light detector to obtain a voltage-versus-phase characteristic curve;
• and
• the controller finds a corresponding humidity value from a lookup table as the humidity information of the display panel according to the voltage-versus-phase characteristic curve.

A gamma curve calibration method, wherein a step of determining a humidity information of a display panel comprises:

• displaying a test pattern via the display panel;
• projecting an incident light to the test pattern of the display panel via a light source to generate a diffraction light;
• and
• detecting the diffraction light via a light detector to obtain the humidity information of the display panel, wherein the step of detecting the diffraction light comprises:
• adjusting at least one driving voltage of the display panel and detecting a light intensity of the diffraction light to obtain a voltage-versus-phase characteristic curve;
• and
• finding a corresponding humidity value from a lookup table as the humidity information of the display panel according to the voltage-versus-phase characteristic curve.

A display apparatus, comprising:

• a display panel;
• a temperature sensor for sensing a temperature of the display panel to obtain a temperature information;
• and
• a controller, coupled to the display panel and the temperature sensor, for determining a humidity information of a display panel, wherein the controller determines a gamma setting for the display panel according to the humidity information and the temperature information, wherein
• the controller adjusts at least one driving voltage of the display panel and learns a light intensity of the diffraction light via the detection result provided by the light detector to obtain a voltage-versus-phase characteristic curve;
• and
• the controller finds a corresponding humidity value from a lookup table as the humidity information of the display panel according to the voltage-versus-phase characteristic curve.