Fujitsu Corporation

Koji Yoshioka

Hiroshi Murakami

Keizo Morita

Munehiro Haraguchi

Masafumi Itokazu

Toshihiro Suzuki

Tetsuya Kobayashi

Tetsuya Hamada

Hisashi Yamaguchi

Hirokazu Aritake

Keiji Hayashi

Junji Tomita

Mari Sugawara

Takeshi Gotoh

Kazuhiro Takahara

Motohiko Fukuhara

Yukio Iigahama

Akira Yamamoto

Ken-ichi Nakabayashi

Mitsuharu Nakazawa

A display device including a diffraction grating from which a diffracted light of the zeroth order and a diffracted light of the first order having different color light components emerge to establish color separation. An array of micro-lenses is arranged on a liquid crystal panel. The liquid crystal panel has a plurality of picture elements and each picture element includes a plurality of color display dots. The color display dots in each picture element are arranged in the vertical relationship and in the order of wavelength of the light. A green light component of diffracted light of the first order is made incident normal to the liquid crystal panel, and the diffracted light of the zeroth order passes through the liquid crystal panel at a greater angle relative to the normal to the liquid crystal panel.

Display device having diffraction grating

A capacitor electrode is formed simultaneously with drain bus lines. This capacitor electrode is electrically connected to the contact of two TFT's through the medium of a contact hole. Then, an interlayer insulating film is formed on the entire face and a black matrix of such light blocking metal film as Ti is formed on the interlayer insulating film so as to overlie the channel parts and the contacts of the TFT's and the capacitor electrode. The capacitor electrode, the interlayer insulating film formed thereon, and the black matrix jointly form a capacitor.

Liquid crystal display device and process for production thereof

A liquid-crystal display device includes a substrate with a pixel area including a plurality of scanning buses, a plurality of data buses intersecting therewith and pixel transistors and pixel electrodes formed at the intersections therebetween; a scanning driver for energizing these scanning buses; and a data driver for presenting these data buses with data signals. A checkout circuit equipped with a plurality of checkout transistors connected to the corresponding data buses or scanning buses; an input bus for applying prescribed checkout signals to the plurality of checkout transistors; and an output bus for picking up the signals from the plurality of checkout transistors.

Liquid-crystal display device having checkout circuit

An active-matrix LCD causes no cross-talk even if the capacitance between a given cell and adjacent data lines is large. The LCD has a liquid crystal panel which has data lines arranged in parallel with one another, scan lines arranged orthogonally to the data lines, and liquid crystal cells arranged at the intersections of the data and scan lines, respectively. Each of the cells has a cell electrode and a switching device that is arranged between and connected to the cell electrode and a corresponding one of the data lines. The conduction of the switching device is controlled in response to a scan pulse applied to a corresponding one of the scan lines. The LCD also has a data driver for applying data signals to the data lines, respectively, so that the data signals are written to corresponding ones of the cells, and a scan driver for applying the scan pulse sequentially to the scan lines. The data driver applies positive and negative signals that are opposite to each other with respect to a reference level, to each of the data lines within the period of the scan pulse, to zero an effective voltage applied to each data line. As a result, a voltage sustained by any cell to which data has been written is not affected by voltages successively applied to a data line to which the cell is connected and a data line to which the cell is capacitively connected.

Active-matrix liquid crystal display and method of driving same

Growing community of inventors

Kawasaki, Japan

Koji Yoshioka