Image display device having delay time setting function and method thereof
An embodiment relates to an image display device having a function of applying a delay time when an input image signal is changed, e.g., a resolution of the image signal is changed, and a method thereof, and when a resolution or an image input source is switched, screen display may be performed smoothly by the image display device including an image input part configured to receive an image signal, a change detection part configured to detect a change in the image signal received through the image input part, a delay time addition part configured to add a predetermined delay time to maintain a blank state when the change detection part detects a change in the image signal, and a blank screen display part configured to switch a display screen to a blank state during the delay time added by the delay time addition part, thereby providing an image display device and method for screen correction of a display device, which enable stable screen transitions without flickering or distortion.
1 . An image display device that is a computer device including one or more processors and a memory storing one or more programs executed by the one or more processors, the image display device comprising:
an image input part configured to receive an image signal;
a change detection part configured to detect a change in the image signal received through the image input part;
a delay time addition part configured to add a predetermined delay time to maintain a blank screen state when the change detection part detects the change in the image signal; and
a blank screen display part configured to switch a display screen to the blank screen state during the delay time added by the delay time addition part,
wherein the change detection part detects at least one of a resolution change of the received image signal, a switching of an image source, and a reset of a frequency or timing of the device, and
the delay time addition part identifies factors of change in the image signal detected by the change detection part and applies different predetermined delay times for maintaining the blank screen state according to preset criteria for each identified factor.
2 . The image display device of claim 1 , further comprising a timing setting part configured to identify a resolution or a refresh rate of the image signal received through the image input part and select or disable the timing according to the resolution or the refresh rate based on a timing table.
3 . The image display device of claim 2 , wherein, when the change detection part detects a change in any one of an image rotation mode, a zoom mode, and a picture-in-picture (PIP)/picture-by-picture (PBP) mode, the timing setting part maintains or adjusts an existing image signal timing based on a frequency or timing change of the image signal received through the image input part.
4 . The image display device of claim 1 , further comprising a warning message output part configured to output a message indicating that a graphics user interface (GUI) is not supported when pixels per second for data of an image signal received through a digital visual interface (DVI) port of the image input part reach a threshold.
5 . An image display method that is performed by a computing device including one or more processors and a memory storing one or more programs executed by the one or more processors, the image display method comprising:
an image input operation of receiving an image signal;
a change detection operation of detecting a change in the image signal input in the image input operation;
a delay time addition operation of adding a predetermined delay time to maintain a blank screen state when the change in the image signal is detected in the change detection operation; and
a blank screen display operation of switching a display screen to the blank screen state during the delay time added in the delay time addition operation,
wherein, in the change detection operation, at least one of a resolution change of the received image signal, a switching of an image source, and a reset of a frequency or timing of the device is detected, and
in the delay time addition operation, factors of change in the image signal detected in the change detection operation are identified, and different predetermined delay times for maintaining the blank screen state are applied according to preset criteria for each identified factor.