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US 2009/0262248 A1Published application
Control apparatus and method for image display
AssigneeCanon Kabushiki Kaisha
InventorsMAKIKO MORI, MUNEKI ANDO
Life of this patent
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Abstract
A detection unit which includes an image display panel, brightness averaging unit, scene changeover detection unit, and brightness suppression unit in order to provide an image display apparatus having an ABL that does not give the observer any visual sense of incompatibility without increasing the circuit scale determines the presence/absence of a scene changeover on the basis of the frame differential or second order differential of the average brightness. If a scene changeover takes place, the display brightness is changed quickly, and if no scene changeover occurs, changed slowly.
Claims18
-25. (canceled)
An image display control apparatus comprising:
- brightness information means for obtaining brightness information corresponding to an average brightness of a display image, wherein the brightness information is based on a video signal which is obtained by one of chromaticity adjustment processing, edge emphasis processing, and character information synthesis processing to an input video signal;
- detection means for detecting an image scene changeover;
- and
- brightness suppression means for suppressing a display brightness,
- wherein said brightness suppression means suppresses the display brightness in response to the brightness information and detection of the scene change, and
- wherein said brightness suppression means linearly changes the display brightness as a function of time when no scene changeover is detected.
3 more elements
An image display control apparatus comprising:
- brightness information means for obtaining brightness information corresponding to an average brightness of a display image, wherein the brightness information is based on a video signal which is obtained by one of chromaticity adjustment processing, edge emphasis processing, and character information synthesis processing to an input video signal;
- detection means for detecting an image scene changeover;
- and
- brightness suppression means for suppressing a display brightness,
- wherein said brightness suppression means suppresses the display brightness in response to the brightness information and detection of the scene changeover.
2 more elements
An image display control method comprising:
- detecting a scene changeover from brightness information corresponding to an average brightness of a display image wherein the brightness information is based on a video signal which is obtained by one of chromaticity adjustment processing, edge emphasis processing, and character information synthesis processing to an input video signal;
- and
- suppressing a display brightness exceeding a target value in response to the brightness information and detection of the scene changeover.
An image display control apparatus comprising:
- brightness information means for obtaining brightness information corresponding to an average brightness of a display image wherein the brightness information is based on a video signal which is obtained by one of chromaticity adjustment processing, edge emphasis processing, and character information synthesis processing performed on an input video signal;
- detection means for detecting an image scene changeover on the basis of a change amount of the brightness information;
- and
- brightness control means for controlling a display signal input to the image display apparatus to suppress brightness of the display signal,
- wherein said brightness control means controls the display signal in response to the brightness information and detection of the scene changeover.
2 more elements
An image display apparatus comprising:
- a plurality of electron-emitting devices connected via column wirings and row wirings;
- phosphor for displaying an image by irradiating with an electron beam emitted by the electron-emitting device;
- a circuit for obtaining brightness information corresponding to an average brightness of a display image wherein the brightness information is based on an image signal which is obtained by gamma processing to an input image signal;
- and
- brightness suppression circuit for suppressing a display brightness,
- wherein said brightness suppression circuit suppresses the display brightness in response to the brightness information and scene changeover detected based on the brightness information.
3 more elements
An image display control apparatus comprising:
- a circuit for obtaining brightness information corresponding to an average brightness of a display image wherein the brightness information is based on an image signal which is obtained by gamma processing performed on an input image signal;
- and
- brightness suppression circuit for suppressing a display brightness,
- wherein said brightness suppression circuit suppresses the display brightness in response to the brightness information and scene changeover detected based on the brightness information.
1 more element
An image display control apparatus comprising:
- brightness information means for obtaining brightness information corresponding to an average brightness of a display image;
- detection means for detecting an image scene changeover on the basis of a change amount of the brightness information;
- and
- brightness suppression means for suppressing a display brightness,
- wherein said brightness suppression means suppresses the display brightness in response to the brightness information and detection of the scene changeover, and
- wherein said brightness suppression means linearly changes the display brightness as a function of time when no scene changeover is detected.
3 more elements
Dependencies are inferred from the claim text.