Organic EL white light emitting element can be used for LCD panel backlight

Konica Minolta technology center has successfully developed the 1000cd/m2 initial brightness, luminous efficiency of 64lm/W, brightness half-life of about 10 thousand hours of organic EL white light-emitting devices. Intended for LCD panel backlight and general lighting.

According to reports, the company's organic light-emitting materials in EL, has been carried out in the study of phosphorescent materials more efficient than fluorescent materials. The luminescent efficiency of phosphorescent materials is higher than that of fluorescent materials. But before that, only 10 thousand and a half hours to achieve brightness and luminous efficiency of green and red phosphorescent material.

This time, the company developed the use of blue phosphorescent material can be achieved at the same time long life and high luminous efficiency of light-emitting materials. Under the initial brightness of 300cd/m2, the brightness half life of 16 thousand hours was realized. By combining the red and green phosphorescent materials which have been developed and applied by other companies, a white light emitting device with a brightness half-life of about 10 thousand hours is successfully developed. By changing the proportion of various colors of light-emitting materials, can be achieved from the lamp color to the color of the white fluorescent lamp control.

Pilot panel lighting area of 5cm * 5cm, using glass substrate, thick about 1mm. Driving voltage is 4V. At present, the research level, the trial area of 20cm * 20cm products. In addition, the flexible light emitting element can be produced by adopting resin bottom plate. The company has not yet decided whether to carry out the LCD panel backlight and lighting equipment business. In addition, the development of blue phosphorescent material has not yet decided whether to export.