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IPS
IPS (in-plane switching) was developed by Hitachi in 1996 to improve on the poor viewing angles and color reproduction of TN panels. Most panels also support true 8-bit per channel color. These improvements came at the cost of a slower response time, initially about 50ms. IPS panels were also extremely expensive. A partial list of LCDs that utilize IPS can be found at PcHardwareHelp.
IPS has since been superseded by S-IPS (Super-IPS, Hitachi in 1998), which has all the benefits of IPS technology with the addition of improved pixel refresh timing. Though color reproduction approaches that of CRTs, the dynamic range is lower. S-IPS technology is widely used in panel sizes of 20" and above. LG.Philips remain as one of the main manufacturers of S-IPS based panels.
Evolution of IPS LCD electrode structures and performance (from Hitachi)
AS-IPS – Advanced Super IPS, also developed by Hitachi in 2002, improves substantially on the contrast ratio of traditional S-IPS panels to the point where they are second only to some S-PVAs. AS-IPS is also a term used for NEC displays (e.g., NEC LCD20WGX2) based on S-IPS technology, in this case, developed by LG.Philips.
A-TW-IPS – Advanced True White IPS, developed by LG.Philips LCD for NEC, is a custom S-IPS panel with a TW (True White) color filter to make white look more natural and to increase color gamut. This is used in professional/photography LCDs.One such monitor to use this technology is the NEC LCD2690WUXi.
H-IPS – Released in late 2006, it improves upon its predecessor, the S-IPS panel. The H-IPS panel is used in the NEC LCD2490WUXi and LCD2690WUXi, Mitsubishi RDT261W, HP LP2475w, Planar PX2611W,[2] and Apple's newest Aluminum 24" iMac. H-IPS up close.
Image of a (switched on) transreflective color TFT LCD taken under a microscope with reflected light illumination lamp off (top, self-illumination only) and on (bottom).
Fringe Field Switching is a technique used to improve viewing angle and transmittance on IPS displays. [3]
英文WIKI上关于IPS的相对详细的说明。AS-IPS对比S-IPS应是在响应时间方面改进了。 |
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