The iPhone 4 Retina display has a 3.5 inch display with 960-by-640-pixel resolution (i.e. 326 pixels per inch or ppi). The New Toshiba technology demonstrated for the first time this week has up to 1280 over 720 pixel resolution for a 4 inch display or 367ppi – the highest number in the industry according to Toshiba.
Toshiba recently exhibited its next-generation display technology aimed at mobile phones and portable electronics. The new display technology has the highest pixels per inch to date and it can reach HD resolution on a 4-inch display – allowing the next generation of mobile devices to display more details than ever before.
The new display technology also incorporates an extremely high contrast (up to 1,500:1), improved color (up to 92% NTSC) and wide viewing angle (up to H/V 176º/176º). Toshiba did not disclose information about the current status of the technology and maybe the more interesting question of when it is going to reach the market. More on the new Toshiba display can be found on the company’s press release.
At a International Symposium started today Samsung showcased a new 10.1-inch display with an whooping resolution of 2560 x 1600 or about 300dpi (lower than that displayed by Toshiba but a big achievement for such a relatively large mobile screen). The new display also incorporates a new technology called PenTile RGBW.
PenTile RGBW was developed by the California based Nouvoyance company in partnership with Samsung Electronics. According to Nouvoyance: ” Images on a PenTile RGBW panel are subpixel rendered, meaning they are drawn at the subpixel level (the individual points of light), rather than to the whole pixels of an RGB stripe display. In fact “pixels” in the traditional sense have been eliminated in PenTile RGBW displays; individual subpixels are not restricted to use in one pixel group, but instead participate in multiple “logical” pixels in their surrounding vicinity”.
PenTile RGBW has a very important advantage – it adds a white pixel to the usual Red, Blue and Green (RGB) turning the display into a RGBW display. The white pixel works in with a locally dimming backlight. It helps to ramps up bright colors, but when the image is monochromatic (or close to monochromatic) the backlight dims and only the white pixel is switched on. This results in power reduction of up to 40% compared to a conventional RGB panel – according to Nouvoyance. More on the PenTile RGBW technology can be found on the Nouvoyance web site.