ADS display mode has many advantages, especially wide viewing angle, and has been widely used in various LCD products. In this paper, based on the upgraded ADS PRO technology, we adopt high CR negative liquid crystal, low reflection surface materials and process, oblique angle light leakage compensation film, spectrum matching optimize of BLU and RGB resin, and combined with mini LED backlight. Based on these methods, we achieve the native CR >3000:1, extreme black state with reflectivity < 1.5%, high ambient color contrast, no color shift angle of > ±60 °, and DCI P3 99% high color gamut. Its ultimate picture quality can be equivalent to OLED.
One of the main factors for popularization of 8K TV is the drastically deteriorated transmittance. We proposed several ways to improve the transmittance of ADS mode in 8K display, such as modifying the traditional pixel layout and adopting new materials. The transmittance gap between 4K and 8K has narrowed.
ADS display mode with positive LC mixture has been widely used in TV and other large size LCD products. After years of technical iterations, positive LC mixture have approached the material limit in terms of transmittance, contrast ratio and so on. In order to improve image quality continuously, especially for high end 8K TV products, we have developed a total negative LC (N‐LC) solution with rubbing alignment process. This total solution includes high CR negative LC material, rubbing PI material and process, and high‐transparent pixel ITO design. Based on this total solutions, TR has been increased by 30% for 8K LCDs. CR has been increased from 1400 to 2500:1 for 8K and 3000:1 for 4K LCDs. Meanwhile, this solution keep response time (RT) and reliability of image sticking (I/S) can meet the regular specifications.
In this paper, the mechanism of light leakage in Advanced Super Dimension Switch (ADS) mode is proposed. Light leakage is caused by external stress of TFT and CF substrates, and then combining with optical retardation of LC layer. External force and retardation of liquid crystal (LC) layer are two key factors of light leakage. Several optical solutions are introduced for further improvement. Optical performance of L0 and L255 image are discussed.
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