Image display apparatus
In an image display apparatus of the invention, a signal input unit outputs a complex image signal, which has been converted to an easily-processed format, to a signal-for-display generator. The signal-for-display generator converts the complex image signal to a signal suitable for displaying at a display unit. An apparatus state-detector detects a state of the display apparatus. Based on apparatus state information input from the apparatus state-detector, an arithmetic unit calculates an amount of non-uniformity to be corrected, and outputs it to a non-uniformity corrector. Based on the non-uniformity correction amount corresponding to a position displayed at the display unit, the non-uniformity corrector corrects the image signal input from the signal-for-display generator, converts it to a signal format that can be used at the display unit, and outputs it.
1. An image display apparatus comprising:
a signal input unit that receives a complex image signal including an image signal having a plurality of frames and a synchronization signal corresponding to the image signal, and outputs the image signal and the synchronization signal;
a signal-for-display generator that converts a signal input from the signal input unit to a signal for displaying with a display element;
a non-uniformity corrector that corrects non-uniformity in the display element;
an apparatus state-detector that detects a state of a display apparatus including the display element, the apparatus state-detector including:
an apparatus-orientation detector that detects first and second orientations in which the display apparatus is disposed, the first and second orientations being different from each other; and
an apparatus operating-time detector that detects an operating time of the display apparatus in the first orientation and an operating time of the display apparatus in the second orientation, the apparatus operating-time detector detecting a time when power of the display apparatus is switched off;
an arithmetic unit that calculates a correction amount based on the state of the display apparatus, the state of the display apparatus including:
the orientations in which the display apparatus is disposed;
a relationship among the operating time of the display apparatus in the first orientation, the operating time of the display apparatus in the second orientation, and a time taken until saturation of the display device; and
the time when power of the display apparatus is switched off; and
a display unit that receives a complex image signal corrected by the non-uniformity corrector, and displays the corrected complex image signal.
2. The image display apparatus according to claim 1 , wherein the apparatus state-detector further includes an apparatus-temperature detector that detects a temperature of the display apparatus,
the state of the display apparatus further includes the temperature of the display apparatus.
3. The image display apparatus according to claim 1 , wherein
the arithmetic unit includes a storage unit that pre-stores non-uniformity correction conditions corresponding to states of the display apparatus, and
the arithmetic unit compares the non-uniformity correction conditions with a state of the apparatus detected by the apparatus state-detector, selects a non-uniformity correction condition corresponding to a comparison result, and outputs it.
4. The image display apparatus according to claim 1 , wherein
the arithmetic unit includes a storage unit that pre-stores a portion of non-uniformity correction conditions corresponding to states of the display apparatus, and
the arithmetic unit outputs a non-uniformity correction condition by comparing the correction conditions with a state of the apparatus detected by the apparatus state-detector, and performing an arithmetic operation based on a correction condition approximating to a state of the apparatus.
5. The image display apparatus according to claim 1 , wherein
the arithmetic unit includes a storage unit that pre-stores an arithmetic expression leading to a non-uniformity correction condition corresponding to a state of the apparatus, and
the arithmetic unit calculates a non-uniformity correction condition based on a state of the apparatus detected by the apparatus state-detector.
6. The image display apparatus according to claim 1 , wherein the arithmetic unit monitors the detection result of the apparatus state-detector, and constantly controls the non-uniformity corrector so as to reduce non-uniformity generated at the display unit.
7. The image display apparatus according to claim 1 , wherein the arithmetic unit monitors the detection result of the apparatus state-detector, and, when a state of the apparatus alters by a fixed amount from a state of the apparatus at a previous correction, controls the non-uniformity corrector so as to reduce non-uniformity generated at the display unit.
8. The image display apparatus according to claim 1 , wherein the arithmetic unit controls the non-uniformity corrector so as to reduce non-uniformity generated at the display unit, based on an externally-applied control signal and the detection result of the apparatus state-detector.