Method for selecting fluorescent powder optical film applied to backlight module and backlight module

摘要

PROBLEM TO BE SOLVED: To provide a backlight for obtaining a fluorescent powder optical film having high matching characteristics with a backlight module, and having high saturation and light transmittance at the same time, and at the same time having preferable chromaticity uniformity. A fluorescent powder optical film selection method applied to a module and a backlight module are provided. A sorting method includes a step of dividing a backlight module into which a fluorescent powder optical film has not yet been combined into a plurality of measurement regions and obtaining a light transmission spectrum of each of the measurement regions; The step of obtaining the chromaticity value after combining the fluorescent powder optical films in the region and the chromaticity value after combining the fluorescent powder optical films in the respective measurement regions obtained in the second step are as follows: Including a step of determining whether it is within the standard chromaticity range, and if the chromaticity value after combining the fluorescent powder optical films of the respective measurement regions is within the standard chromaticity range, After the selection of the fluorescent powder optical film to be applied is completed, the chromaticity value of at least one of the measurement areas after combining the fluorescent powder optical film is within the standard chromaticity range. If it is outside al, it returns to the second step in combination new fluorescent powder optical film to the measurement area. [Selection] Figure 2