Title:
LED DISPLAY DEVICE AND METHOD FOR CORRECTING LUMINANCE THEREOF
Document Type and Number:
WIPO Patent Application WO/2017/033709
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide: an LED display device for correcting the luminance of each LED element while reducing the amount of calculation and amount of data stored required for calculating the lighting time of each LED element; and a method for correcting the luminance of the LED display device. This LED display device 100 comprises: a first display unit 10 including a plurality of LED elements; a second display unit 20 including measurement LED elements identical to the LED elements of the first display unit 10; a luminance measurement unit 9 for measuring the luminance of the measurement LED elements; a luminance degradation rate storage unit 11 for storing a degradation rate in the luminance of the measurement LED elements; an accumulated lighting time estimation unit 6 for estimating an accumulated lighting time at each predetermined time interval; an average duty ratio storage unit 7 for storing an average duty ratio calculated by dividing the accumulated lighting time estimated by an accumulated operation time; and a luminance correction coefficient calculation unit 12 for calculating a luminance degradation rate by referring to the luminance degradation rate storage unit 11 and the average duty ratio storage unit 7, and calculating a luminance correction coefficient from the luminance degradation rate.
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Inventors:
MATOBA TAKASHI (JP)
SHIBUE SHIGENORI (JP)
ASAMURA YOSHINORI (JP)
SHIBUE SHIGENORI (JP)
ASAMURA YOSHINORI (JP)
Application Number:
PCT/JP2016/073131
Publication Date:
March 02, 2017
Filing Date:
August 05, 2016
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
G09G3/32; G09G3/20; G09G3/34; H01L33/00; H05B37/02
Foreign References:
| JP2007072056A | 2007-03-22 | |||
| JP2011082213A | 2011-04-21 | |||
| JP2013054260A | 2013-03-21 | |||
| JP2008076741A | 2008-04-03 | |||
| JP2012128147A | 2012-07-05 |
Other References:
See also references of EP 3343550A4
Attorney, Agent or Firm:
YOSHITAKE Hidetoshi et al. (JP)
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