Skip to main content

Hitachi Research & Development

Hitachi

figure

Making use of the high performance IPS-Pro technology to attain high transmittance and wide viewing angle, we have developed a liquid crystal module with both thinness and high image quality.
We applied that technology to achieve the world's thinnest liquid crystal TV (35 mm thick), contributing to development of the Wooo UT Series ultra-thin LCD TV to the product stage.

The Hitachi Research Laboratories and the business division cooperated to develop an ultra-thin LCD module, power unit, and ventilation system and an innovative frame structure to achieve an ultra-thin LCD TV. The thinness and completely flat back side design realizes a free-layout liquid crystal TV. We applied the backlight optical design technology that we have cultivated to establish ultra-thin technology by introducing a new type of diffuser and reflector and to reduce the number of fluorescent lamps needed.

figure

High-performance IPS-Pro technology

As a result, we achieved an ultra-thin backlight that is 10 mm or less thick (less than half of previous model in thickness). We also developed the IPS-Pro system, whose high contrast ratio and wide viewing angle technology makes it possible to achieve both thinness and high image quality.

  • Y.Utsumi et al "Reduced Light Scattering Intensity from liquid Crystal for Higher Contrast Ratio in IPS-Pro LCDs" lDW' 07,p.1749, 2007.
  • Y.Utsumi et al: "Analysis of Light Leakage of Caused by Color Filter between Crossed Polarizers," Jpn.J.Appl.Phys., 46, p, 1047, 2007.
  • D.Kajita et al: "IPS-LCD with High Contrast Ratio Over 80: 1 at All Viewing Angles," SID Symposium Digest 2006, p. 1162, 2006.
  • D.Kajita et al: "Optically Compensated IPS-LCD for TV Applications," SID Symposium Digest 2005, p. 1160, 2005.
  • A. Konno et al: "RGB Color Control System for LED Backlights in IPS-LCD TVs," SID Symposium Digest 2005, p. 1380, 2005.