Citizen Watch Company, Ltd.

Katsumi Aota

Kanetaka Sekiguchi

Hiroshi Tanabe

Seigo Togashi

Etsuo Yamamoto

Kazuaki Sorimachi

Yuichi Akiba

Kozo Miyoshi

A timepiece provided with a liquid crystal display panel () for displaying thereon at least one of time information () and calendar information (), wherein a solar battery unit () is provided to face at least a part of a visual recognition side surface of the liquid crystal display panel () or an opposite-side (lower-side) surface thereof, the light being applied to a power generation portion of the solar battery unit () through a transmission portion of the liquid crystal display panel () to generate electric power or what is displayed on the liquid crystal display panel () being visually recognized through a transmission portion of the solar battery unit (), a timepiece circuit and the liquid crystal display panel () being driven by utilizing the electric power generated by the solar battery unit ().

Liquid crystal display device

A matrix display panel comprising a plurality of liquid crystal display elements. Each liquid crystal display element is connected to a plurality of diode rings which are connected in series between a scanning electrode and a data electrode. Each diode ring comprises a pair of diodes of opposite polarity which are connected in parallel.

Matrix display panel having a diode ring structure as a resistive element

A liquid crystal display device having a color filter comprises a liquid crystal shutter device, at least one color filter layer formed on one surface of the liquid crystal shutter device, and at least one diffusion preventing layer for protecting the color filter layer. The color filter layer is prepared by a photolithographic process comprising the steps of forming a layer being colored of gelatin and the like on one surface of the liquid crystal shutter device, coating a photoresist layer thereon, while illuminating the liquid crystal shutter device by white light from the other surface thereof, applying a voltage to the selected opposed surface thereof, applying a voltage to the selected opposed electrode groups to form a latent image in alignment with the electrode groups by a photochemical action, developing the latent image to form a photomask, and while using this mask as a guide, coloring the layer being colored.

Method of making a liquid crystal display with color filters

An 'active matrix' type of liquid crystal matrix display panel, in which diodes are employed as switching elements coupled to each liquid crystal display element, photo-sensing elements such as photo-diodes are formed upon the display panel to enable data input to the panel by variation of the electrical characteristics of the photo-sensing elements by selectively varying the level of light incident thereon. The photo-sensing elements, when composed of photo-diodes, can be formed during the same manufacturing process and in the same manufacturing steps as those in which the diode switching elements are formed, so that no appreciable increase in manufacturing cost is entailed by adding such a data input function.

Flat panel display device having on-screen data input function

In a liquid crystal color display panel comprising a color filter layer superposed on one surface of a liquid crystal shutter device for transmitting or intercepting light by the application of a voltage across electrode groups. This color filter layer is formed of photosensitive emulsion layers which are sensitive to specific color light respectively and provided on a transparent plate. While illuminating the liquid crystal shutter device from the other surface thereof by specific color light sequentially. The voltage is applied across selected opposed electrode groups to form latent images in alignment with the positions of the electrode groups. Then, the latent images are developed to produce colors. In this manner, filter layers are made in alignment with the shutter device.

Growing community of inventors

Tokorozawa, Japan

Katsumi Aota