The paper presents an effective preparation approach for patterning quantum-dot color conversion films (QDCCF) in white-balance display backlights, where the red and green sub-pixel arrays are respectively fabricated by precise screen printing technology and the subsequent overprinting process. By using the D65 light source as a design target, a theoretical adjustment method for output white balance is proposed, in which the quantity ratio of QDs can be obtained by combining the theoretical balance of three primary colors, the experimental balance of the QD’s intensity, and the transmittance of color filter (CF). The ratio of green/red QDs for the target white balance was verified by both the experiment and theoretical calculation. Results show that the measured chromaticity coordinates of the backlight sample are (0.3138, 0.3402), the corresponding color temperature is 6385 K, and the color gamut can reach 86.1% Rec. 2020 in CIE 1976 chromaticity diagram. The experimental results accords well with the design theory, which supports that this method could be an alternative way for the fabrication of QDCCF.

本文提出了一种在白平衡显示背光源中构图量子点颜色转换膜（QDCCF）的有效制备方法，其中红色和绿色子像素阵列分别通过精密丝网印刷技术和后续套印工艺制造。以D65光源为设计目标，提出了输出白平衡的理论调整方法，结合三基色的理论平衡、QD强度的实验平衡、和滤色器（CF）的透射率。通过实验和理论计算验证了目标白平衡的绿色/红色量子点比率。结果表明，测得的背光样品色度坐标为(0.3138, 0.3402)，对应色温为6385K，色域可达86.1% Rec。CIE 1976 色度图中的 2020。实验结果与设计理论吻合良好，支持该方法可以作为制备QDCCF的替代方法。