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The color converting film (CCF) is first fabricated by the inkjet printing technology with the drop-on-demand advantage in the paper, the volume ratio of the red quantum-dots (QDs) over green QDs is 1:12.9 at balanced intensity, and each subpixel of the CCF is sprayed with five droplets with each volume of 48 pL. The CCF has been equipped in the corresponding liquid crystal display (LCD) module. In theory, the optical efficiency of the CCF mainly depends on the quantum yield of QDs, therefore, and the total optical efficiency can improve by 2.4 times. The LCD module sample has been tested to verify the performance. Experimental results show that the color gamut reaches 131.4% NTSC in CIE 1931, the total optical efficiency is 20%. Comparing with the wide color gamut backlight module with QDEF, the color gamut improves by 16.4% NTSC, the total optical efficiency improves by 2.1 times, and the average color crosstalk ratio decreases by 4.21% under the condition that the misaligned size is larger than the width of the black matrix. Our method provides theoretical guidance to realize high-performance LCDs.

Quantum dot (QD) nanocrystals dispersed in photoresist (PR) film was developed and applied to white organic light-emitting diode (OLED) to improve optical power of red color through down-converting of blue and green light. To integrate to white OLED display panel, the QD dispersed photoresist film was prepared in a thickness of 2 \mu\m with high concentration of QDs up to 30 wt%. QDs were dispersed successfully in PR with a matching of nonpolar characteristic for the ligands of QDs and PR as well as a careful mixing process of PR and QD dispersed solutions. We also realized the patterning of QD dispersed PR film with a stripe pattern of 60-\mu\m width without a residual layer. The experimental measurement after passing through a 30 wt% QD dispersed PR film and a red color filter in white OLED shows the enhancement of 40.2% in the optical power of red color compared to that from a conventional white OLED without QD dispersed PR film. [ABSTRACT FROM PUBLISHER]