Nowadays, displays are ubiquitous in our daily lives. Long-time exposure to a display’s unnatural light could influence the user’s circadian rhythm, especially at night. Here, we propose a four-color micro-light-emitting diode (LED) display to achieve low circadian action for nighttime uses. Specifically, we evaluate the RGBW-type (red, green, blue, and white) and RYGB-type (red, yellow, green, and blue) micro-LED displays in terms of circadian effect and color gamut coverage. With the addition of an extra white subpixel, it was found that the circadian effect at night can be reduced dramatically, but the color gamut remains unchanged. However, with an additional yellow subpixel, both the circadian effect and color gamut were found to improve. Finally, we simulated the circadian illuminance of real image contents for different displays. In comparison with existing liquid crystal displays, organic LED displays, and RGB (red, green, blue) micro-LED displays, the proposed four-primary-color micro-LED displays can significantly reduce the circadian effect at night.

中文翻译：

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具有四种原色的低昼夜活动Micro-LED显示器的设计和仿真

如今，显示器在我们的日常生活中无处不在。长时间暴露在显示器的不自然光线下可能会影响用户的昼夜节律，尤其是在晚上。在这里，我们提出了一种四色微发光二极管（LED）显示器，以实现夜间使用的低昼夜节律。具体来说，我们根据昼夜节律效果和色域覆盖范围评估RGBW型（红色，绿色，蓝色和白色）和RYGB型（红色，黄色，绿色和蓝色）微型LED显示器。发现通过添加额外的白色子像素，可以显着降低夜间的昼夜节律效果，但色域保持不变。但是，使用额外的黄色子像素，发现昼夜节律效果和色域均得到改善。最后，我们针对不同的显示器模拟了真实图像内容的昼夜照明度。