Display burn-in prevention device and method with motion analysis
View Patent ↗Provided is a display device including a video signal analysis block ( 110 ) for analyzing a video signal and determining a type of video from an analysis result, a function control block ( 120 ) for controlling a gain value of the video signal according to the type of video, a video signal control section ( 122 ) for adjusting the video signal on the basis of the gain controlled by the function control block, and a display panel ( 300 ), having a plurality of pixels arranged to self-emit light according to the video signal, for displaying a video on the basis of the video signal adjusted by the video signal control section ( 122 ).
1. A display device comprising:
circuitry configured to
determine a type of video data of a video signal as corresponding to a still image, a partial moving image or a moving image based on a generated a motion vector of a feature point between a plurality of frames of the video signal and histograms of each of the plurality of frames of the video signal;
record a duration of a still image if it is identified that the video signal corresponds to a still image;
control a gain value of the video signal according to the type of video data;
adjust the video signal based on the gain value; and
control a display panel to display a video image based on the adjusted video signal.
2. The display device according to claim 1 , wherein
the generated histograms correspond to a luminance of each of the plurality of frames of the video signal, and
the circuitry is configured to identify whether the video signal corresponds to a still image based on a comparison of the histograms between the plurality of frames of the video signal.
3. The display device according to claim 1 , wherein
the generated histograms represent luminance distributions of the video signal, and
the circuitry is configured to identify whether the video signal corresponds to a still image, a partial moving image, or a moving image based on a result of a comparison of the histograms between the plurality of frames of the video signals and a vector quantity of the motion vector.
4. The display device according to claim 1 , wherein
the generated histograms represent luminance distributions of the video signal, and
the circuitry is configured to identify whether the video signal is a signal corresponding to text information based on a luminance bias of the video signal obtained from at least one of the histograms.
5. The display device according to claim 1 , wherein
the circuitry is configured to determine whether the video signal includes alternately iterated still and moving images.
6. A method of driving a display device, the method comprising:
determining a type of video data of a video signal as corresponding to a still image, a partial moving image or a moving image based on a generated a motion vector of a feature point between a plurality of frames of the video signal and histograms of each of the plurality of frames of the video signal;
recording a duration of a still image if it is identified that the video signal corresponds to a still image;
controlling a gain value of the video signal according to the type of video data; and
adjusting the video signal based on the gain value.
7. The method according to claim 6 , further comprising:
detecting the histograms of the plurality of frames of the video signal, wherein the detected histograms represent luminance distributions of the video signal; and
determine whether the video signal corresponds to a still image based on a result of comparing the histograms between the plurality of frames of the video signal.
8. The method according to claim 6 , further comprising:
detecting the histograms of the plurality of frames of the video signal, wherein the detected histograms represent luminance distributions of the video signal;
detecting the motion vector of the feature point between the plurality of frames; and
identifying whether the video signal corresponds to a still image, a partial moving image, or a moving image based on a result of comparison of the histograms between the plurality of frames of the video signal and a vector quantity of the motion vector.
9. The method according to claim 6 , further comprising:
detecting the histograms of the plurality of frames of the video signal, wherein the detected histograms represent luminance distributions of the video signal; and
identifying whether the video signal corresponds to text information based on a luminance bias of the video signal obtained from at least one of the histograms.
10. The method according to claim 6 , further comprising:
determining whether the video signal includes alternately iterated still and moving images.
11. An image processing device comprising:
circuitry configured to
determine a type of video data of a video signal as corresponding to a still image, a partial moving image or a moving image based on a generated a motion vector of a feature point between a plurality of frames of the video signal and histograms of each of the plurality of frames of the video signal;
record a duration of a still image if it is identified that the video signal corresponds to a still image;
control a gain value of the video signal according to the type of video data; and
adjust the video signal based on the gain value; and
a display panel configured to display the adjusted video signal.