Abstract— In this paper, an active backlight control technology and a data‐processing algorithm has been developed to improve the image quality in IPS‐mode LCD TVs. The image‐blinking problem caused by repeatedly abrupt changes in the backlight luminance was solved by using algorithms [Fba (flexible‐boundary algorithm) and Cfa (cumulative feedback algorithm)] and an optimized number of backlight dimming steps based on human perception. In the IPS‐mode 42‐in. TFT‐LCD panel, the dynamic contrast ratio can be more than twice the typical level by means of a lower black luminance and a higher white luminance. Additionally, the power consumption and LCD temperature were lowered.
We achieved over 1000:1 of dynamic Contrast ratio for IPS mode LCD TV by the ADIC (Adaptive Dynamic Image Control) technology. The ADIC technology comprises backlight modulation and data stretch after input image analysis in order to improve the image quality.
The OLED display has been known to have excellent display characteristics such as high response speed, wide viewing angle and color rendering capabilities. However, OLED devices require sustained efforts to improve the OLED lifetime due to a characteristic that the luminance decreases according to elapsed time. In this paper, we proposed hierarchical logo detection and brightness control method to prevent image sticking on OLED TV. We have experimented with this method in FPGA and We prove that the proposed algorithm can increase the lifetime of OLED TV.
This paper presents a novel quantifiable latency measurement system specialized for HMD devices. After analyzing the head position, we implement the rotary platform and the pixel luminance change detector. Then, we accurately measure the latency between the HMD physical movement and an output image change.
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