15‐4: Improvement of Gradation and Color Shift in Dark Luminance Area with Signal Correction for OLED displays

Abstract

In recent years, OLED displays have been widely used in smartphones, in‐vehicle displays, and so on. Such applications require a dimming function that responds to external ambient light. It is also necessary to achieve precise gradation and color reproducibility in low luminance levels in dark environments. In this paper, we address two problems of gradation collapse in low luminance levels during low luminance dimming using PWM‐ driven duty ratio control, and color shift due to current leakage between sub‐pixels. In addition, we propose a correction method for improving gradation reproducibility and color reproducibility, using luminance correction.

91‐4: Temperature Compensation Study of Micro‐LED by Machine Learning

“…It is considered as a crucial development direction for the next generation of display technologies, with wide application prospects in high-tech fields like smartwatches, headmounted displays, smart homes, and automotive terminals 1,2 . However, the display performance of Micro-LED is greatly affected by temperature fluctuations, posing challenges to its stability and reliability, including color shift which can be used to measure the display performance of a monitor under different operating conditions 3,4 . As shown in Table 1, compared to LCD and OLED, Micro-LED exhibits significant high-temperature color shift in automotive applications, failing to meet color shift standard requirements.…”