Apparatus and method for displaying image, and apparatus and method for driving light-emitting device

An apparatus for driving a light-emitting device, the apparatus comprising:

• a modulation signal generator configured to generate and output a control signal for controlling the light-emitting device, change a characteristic of the control signal corresponding to an abnormal operation section in an abnormal operation of a power source or an image input into an image display apparatus, and output the changed control signal;
• a compensator configured to provide a comparison result which compares a detection signal of the light-emitting device with a reference signal to the modulation signal generator, and compensate the light-emitting device by converting the control signal according to the comparison result;
• and
• a transient state determiner configured to receive a transient state signal for acknowledging the abnormal operation of the image display apparatus and control the modulation signal generator to change the characteristic of the control signal by using the transient state signal.

A method of displaying an image, the method comprising:

• generating and outputting image data of an input image and a timing signal for displaying the image data on a screen, and providing at least one from among a transient state signal in an abnormal operation of a power source and the image input into an image display apparatus;
• receiving the image data and the timing signal and displaying the image on a screen of a display panel by using the image data and the timing signal;
• and
• generating a control signal for controlling a light-emitting device providing light to the display panel and controlling the light-emitting device by adjusting a characteristic of the control signal corresponding to an abnormal operation section in the abnormal operation to be changed by using the transient state signal.

A method of driving a light-emitting device, the method comprising:

• generating and outputting a control signal for controlling the light-emitting device, by a modulation signal generator, and changing and outputting a characteristic of the control signal corresponding to an abnormal operation section in an abnormal operation of a power source or an image input into an image display apparatus;
• providing, by a compensator, a comparison result which compares a detection signal of the light-emitting device with a reference signal, to the modulation signal generator, and compensating the light-emitting device by converting the control signal according to the comparison result;
• and
• receiving, by a transient state determiner, a transient state signal for acknowledging the abnormal operation of the image display apparatus, and controlling the characteristic of the control signal to be changed by using the transient state signal.