Brightness control and power control of display device

A method of controlling a display driver that drives a display panel comprising the steps of:

• storing a brightness value in a memory, the stored brightness value being used by the display driver;
• calculating a difference between an input brightness value and the brightness value stored in the memory;
• and
• updating the brightness value stored in the memory when the difference calculated in the calculating step is larger than a reference value, the updated brightness value being the stored brightness value used by the display driver.

A display apparatus comprising:

• a display panel including a plurality of display cells;
• a detector detecting power consumption in said display panel and outputting a power consumption value;
• a controller gradually decreasing a brightness value output thereof, when the power consumption value is larger than a set point, and gradually adjusting the brightness value to a brightness set value, when the power consumption value is smaller than the set point;
• and
• a display driver individually driving the display cells of said display panel in response to the brightness value output so that brightness of the display cells varies according to the brightness value.

A method of controlling a display driver that drives a display panel, comprising the steps of:

• detecting power consumption in said display panel and outputting a power consumption value;
• controlling a brightness value in accordance with:
• gradually decreasing a brightness value when the power consumption value is larger than a set point, and
• gradually adjusting the brightness value to a brightness set value when the power consumption value is smaller than the set point;
• and
• outputting the controlled brightness value to the display driver.

A display apparatus, comprising:

• a display panel including a plurality of display cells;
• a detector, connected to a power supply line in turn connected to the display panel, detecting power consumption by detecting a current flowing through the power supply line and outputting an analog detection signal;
• a display driver;
• a microprocessor unit, connected to the display driver, comparing a digital detecting value obtained from the analog detecting signal with a reference value, determining a digital brightness value based on the comparison result and outputting the digital brightness value to the display driver, the microprocessor unit gradually decreasing the digital brightness value when the digital detection value is larger than the reference value;
• and
• the display driver individually driving the display cells of said display panel in response to the digital brightness value output of the microprocessor unit so that brightness of the display cells varies according to the digital brightness value.

A method of controlling a display driver that drives a display panel, comprising the steps of:

• detecting power consumption in said display panel and outputting an analog detection signal;
• converting the analog detecting signal to a digital detecting value;
• comparing the digital detecting value with a reference value and determining a digital brightness value based on the comparison result, in a microprocessor unit, the microprocessor unit gradually decreasing the digital brightness value when the digital detection value is larger than the reference value;
• and
• outputting the digital brightness value from the microprocessor unit to the display driver.