LED DISPLAY DEVICE AND METHOD FOR CORRECTING LUMINANCE THEREOF

• Main Authors: MACHIDA, Naoyuki, ASAMURA, Yoshinori, SHIBUE, Shigenori
• Format: Patent
• Language: English; French; German
• Published: 05.02.2020
• Subjects: ADVERTISING; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CRYPTOGRAPHY; DISPLAY; EDUCATION; PHYSICS; SEALS

It is an object of the present invention to provide an LED display device performing correction of a luminance of each LED element so as to suppress a decrease in image quality due to a variation of characteristics of each LED element, and a method for correcting a luminance thereof. The LED display device (100) includes a display part (10) including a display module including a plurality of LED elements, a first temperature detecting part (31), first and second aging display parts (21), (22) including at least one measurement LED element equivalent to the LED elements, a luminance measurement part (9) measuring a luminance of the measurement LED elements, a second temperature detecting part (32), an accumulated lighting time storage part (6) storing accumulated lighting times of the plurality of LED elements, a luminance decreasing rate storage part (11) storing a relationship between an accumulated lighting time of the measurement LED elements and a luminance decreasing rate of the measurement LED elements, and a luminance correction coefficient calculating part (12) calculating the luminance correction coefficient with reference to the plurality of LED elements, in which the luminance correction coefficient calculating part (12) corrects the luminance correction coefficient based on the temperatures detected by the first and second temperature detecting parts (31), (32).