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Mobara, Japan

Oka S.,Hitachi Displays | Sugita T.,Hitachi Displays | Naganuma T.,Hitachi Displays | Saito T.,Hitachi Displays | And 2 more authors.
Proceedings of the International Display Workshops | Year: 2011

In this paper, we investigate a 3D display using a Liquid Crystal Gradient Refractive Index (LC GRIN) lens. We optimized the structure of the LC GRIN lens and the parameters of the liquid crystal to obtain ideal refractive index dispersion. A crosstalk value of 2.5% for 2 views is achieved in our 3D display using the LC GRIN lens. Source

Takada N.,Hitachi Ltd. | Mamba N.,Hitachi Ltd. | Eriguchi T.,Hitachi Ltd. | Kudo Y.,Hitachi Ltd. | And 8 more authors.
Journal of the Society for Information Display | Year: 2010

High-resolution displays are now needed for mobile equipment, not only for cell phones but for other devices such as ultra-mobile PCs (UMPCs) and mobile Internet protocol televisions (IPTVs). A new low-cost and low-power driving method for high-resolution in-plane-switching (IPS) liquid-crystal displays (LCDs) on a low-temperature polycrystalline-silicon (LTPS) thin-film-transistor (TFT) platform has been developed. Because this method drives common electrodes separated by each line, it can reduce inversion frequency, unlike "dot-inversion" or "column-inversion" methods. On the other hand, it was found that horizontal smear is an obstacle to achieve this method. To solve this problem, techniques to optimize the timing of RGB time-sharing are proposed. A 5-in. WXGA (1 366 × 768) prototype using the new driving method was fabricated, and it was found that the horizontal smear is less than ±1% of the luminance and that the power consumption of the display discharge and charge is 0.245 W. © Copyright 2010 Society for Information Display. Source

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