IMAGE DISPLAY APPARATUS

• US 20090046091A1
• Filed: 12/15/2006
• Published: 02/19/2009
• Est. Priority Date: 12/28/2005
• Status: Active Grant

• Current Assignee: Sharp NEC Display Solutions, Ltd. (Hon Hai Precision Industry Co., Ltd.)
• Original Assignee: NEC Display Solutions, Ltd. (NEC Corporation)
• Inventors: Arai, Yutaka
• Granted Patent: US 8,368,685 B2
• Time in Patent Office: Days
• US Class Current: 345/214
• CPC Class Codes: G09G 2320/0233 Improving the luminance or brightness uniformity across the screen
• CPC Class Codes: G09G 2320/0285 using tables for spatial correction of display data
• CPC Class Codes: G09G 2320/041 Temperature compensation
• CPC Class Codes: G09G 2320/048 using evaluation of the usage time
• CPC Class Codes: G09G 2320/08 Arrangements within a display terminal for setting, manually or automatically, display parameters of the display terminal
• CPC Class Codes: G09G 2330/026 Arrangements or methods related to booting a display
• CPC Class Codes: G09G 2340/04 Changes in size, position or resolution of an image
• CPC Class Codes: G09G 5/003 Details of a display terminal, the details relating to the control arrangement of the display terminal and to the interfaces thereto specific for a CRT G09G1/165; for a flat panel G09G3/2092
• CPC Class Codes: G09G 5/12 Synchronisation between the display unit and other units, e.g. other display units, video-disc players

Abstract

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.

Claims

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;

an arithmetic unit that calculates a correction amount based on a detection result of the apparatus state-detector, and outputs the correction amount to the non-uniformity corrector; 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 includes an apparatus-orientation detector that detects an orientation of the display apparatus.

3. The image display apparatus according to claim 1, wherein the apparatus state-detector includes an apparatus-temperature detector that detects a temperature of the display apparatus.

4. The image display apparatus according to claim 1, wherein the apparatus state-detector includes an apparatus operating-time detector that detects an operating time of the display apparatus.

5. 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.

6. 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.

7. 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.

8. The image display apparatus according to claim 1, wherein the arithmetic unit includes an input unit that obtains, from outside, a timing of changing a non-uniformity correction amount.

9. 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.

10. 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.

11. 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.