Ultra-high color gamut system achieved by quantum dot photoresist and color filter system

ABSTRACT

Color gamut of liquid crystal display (LCD) was restricted by traditional white backlight unit (BLU) and color filter (CF). The widely used white light emitting diode (LED) BLU has a broad emission band in green-red region, which results in poor color coordinates and narrow color gamut. Quantum dots (QDs) were introduced into BLU to improve color gamut of LCD, however, there was still a limit caused by the broad absorption peaks of CF. In order to conquer the aforementioned difficulties, a novel quantum dot photoresist (QDPR) was researched and developed in this paper, which could be patterned through photo process including cleaning, coating, exposure, developing and post bake. The patterned QDPR combined with CF can significantly improve color gamut of LCD. There were problems to be overcome though, a feasible method of achieving ultra-high color gamut was presented.

KEYWORDS:

• Liquid crystal display
• quantum dots
• photoresist
• color filter
• ultra-high color gamut