M
Makoto Tsumura
Researcher at Hitachi
Publications - 118
Citations - 2067
Makoto Tsumura is an academic researcher from Hitachi. The author has contributed to research in topics: Liquid-crystal display & Display device. The author has an hindex of 23, co-authored 118 publications receiving 2063 citations. Previous affiliations of Makoto Tsumura include Panasonic & Nitto Denko.
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Patent
Plane-like lighting units and display equipment provided therewith
TL;DR: A light unit which includes a plurality of light-emitting diode (LED) light sources arranged in parallel, a light-guiding member arranged on said LED light sources, and an optical path changing part arranged above said light-diffusion part is shown in this article.
Patent
Illuminating arrangement with reflector having inclined irregularities or corrugations
TL;DR: In this article, a light guide with a collimating unit provided at least on one side of the light guide for collimating rays incident on the guide, and a light source disposed in the vicinity of the collimating units and surrounded by a reflector is presented.
Patent
Active matrix crystal display apparatus using thin film transistor
Kikuo Ono,Makoto Tsumura,Kazuhiro Ogawa,Hiroki Sakuta,Suzuki Masahiko,Toshiki Kaneko,Yoshiaki Nakayoshi,Kenichi Onisawa,Hashimoto Kenichi,Tetsuro Minemura +9 more
TL;DR: In this article, a gate insulating film under a transparent pixel electrode on a transparent substrate is provided with an aperture smaller than a plane area of the pixel electrode, a source electrode pattern under a pixel electrode is composed so as to cross the aperture, and a thin film transistor (TFT) having a gate electrode of which end portion is tapered with a taper angle equal to or less than three times (where, less than 90°) of the end portion of a semiconductor pattern is provided.
Patent
Active matrix liquid crystal display device
Masuyuki Ota,Genshiro Kawachi,Masaaki Kitajima,Tohru Sasaki,Masahito Oh-e,Katsumi Kondo,Makoto Tsumura +6 more
TL;DR: In this paper, a liquid crystal display is interposed between first and second substrates, and a plurality of picture elements are constituted of scanning electrodes and signal electrodes arranged in a matrix, and switch-transistors are provided in the picture elements, connected to picture element electrodes and can operate while the major-axis direction of the liquid crystal molecules is maintained almost parallel with the surfaces of the substrates.
Patent
Color/black-and-white switchable portable terminal and display unit
TL;DR: In this paper, a display unit has a brightness equal to that in a conventional black-and-white reflection type and the power consumption is small at a standby time, and bright color display of high quality can be produced and power consumption was small at the time of use.