LED classification method, LED classification device, LED classification program, recording medium, and liquid-crystal display device

• Main Authors: NAKANISHI TAKASHI, TATSUMI MASAKI, TAMAKI KAZUO, MIYATA MASATAKA, NAGATA KIYOSHI, OHTA MASAYUKI, KURITA KENICHI
• Format: Patent
• Language: English
• Published: 17.06.2015
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

Provided is an LED classification device (21) whereby, when a chromaticity of a primary light of an LED, wherein an LED element which emits the primary light is combined with a fluorescent light body which is excited by the primary light and emits a secondary light of a longer wavelength than the primary light, is within a prescribed range, the LED is classified as being usable in a backlight of a liquid-crystal display device. A coefficient computation unit (26) and a correction chromaticity computation unit (27) compute, for the total number of LEDs which are to be classified, a correction value of a chromaticity which is obtained with the primary light envisioned as having passed through a color filter of the liquid-crystal display device, and correct the chromaticity by subtracting the correction value from the chromaticity which is obtained for each of the total number of LEDs which are to be classified. A chromaticity rank classification unit (28) classifies the LEDs by chromaticity rank on the basis of the corrected chromaticity.