News Release: The former Hitachi Displays

July, 25 2006

Development of In-vehicle ultra-wide IPS LCD module

Hitachi Displays, Ltd. (Executive President: Kazuhiro Mori) recently developed an in-vehicle ultra-wide TFT LCD module using IPS technology featuring high picture quality and a wide viewing angle. Sample product will be shipped in October 2006.
In addition to high reliability, in-vehicle LCD panels require good visibility from the driver and front passenger seats especially in bright outside environments, good starting performance even on cold winter mornings, and true black display for an upmarket look.
Based on our belief that IPS technology, employed for liquid crystal television sets, digital cameras and mobile phones, is also suitable for achieving superior visibility and high quality images in in-vehicle LCD applications, we started developing in-vehicle LCD panels. To increase visibility in bright environments, for example daytime driving, high brightness and high contrast were achieved with IPS technology, originally developed for TV displays. To improve cold starting performance and color reproducibility on cold winter mornings, a high-luminance LED backlight was developed and used in in-vehicle LCD panels for the first time.
The result is brightness of about 660cd/m2 and contrast of 950:1 for the 9.2-inch LCD module. This will reduce driver stress and create a more comfortable driving environment.

Features of the product

1. Use of IPS technology
A wide viewing angle is an inherent feature of IPS technology. Using this technology ensures good images of head-on viewing quality from any angle.
IPS technology also enhances black display quality, meaning viewed from any angle, true black background color is reproduced when there is no signal input. This gives a quality look to the display. In addition, high brightness achieved with IPS technology ensures the LCD panel can be viewed clearly even in sunlight.

2. Development of LED backlight
Using simulations, a highly reliable and efficient LED backlight was developed. Superlative color homogeneity is achieved with LED chip color offset capability.

3. Major applications
(1) Car navigation systems, which have become increasingly luxurious and multifunctional, for example to be used for a digital TV and Internet display
(2) Rear seat LCDs viewed from various angles for rear seat entertainment
(3) Future instrument panels (clusters) requiring high black display quality

What is IPS technology?

IPS technology is a horizontally charging LCD technology that functions differently to conventional TFT LCDs. Hitachi, Ltd. unveiled IPS technology in 1995, and it has been used in commercial applications since 1996, evolving into Super-IPS, Advanced-Super IPS and IPS-Pro. Liquid crystal molecules rotate parallel to the TFT substrate when a charge is applied horizontally. This simple movement of molecules produces superior performance in terms of viewing angle, color reproductivity and response speed to halftones. IPS technology has been used for large 32-inch LCD television sets manufactured by Hitachi, Ltd. and Matsushita Electrical Industry. The picture quality of these sets is rated very highly.

Major Specifications
Panel size 23cm (9.2-inch) 230mm x 38mm
Pixel pitch 960mm (horizontal) x 160mm (vertical)
Display color Over 260,000 colors
Viewing angle Over 170 degrees (vertically and horizontally)
Color reproducibility 56% (ratio to NTSC standard)
Brightness 660cd/m2
Contrast ratio 950 : 1