Seiko Epson Corporation

Eiji Chino

Hidekazu Kobayashi

Hidehito Iisaka

Masayuki Yazaki

Shuhei Yamada

Yutaka Tsuchiya

Tsuyoshi Maeda

Kiyohiro Samizu

Jin Jei Wu

Ikutaka Nachi

To provide a liquid crystal display device having a high display quality and an excellent display characteristic and an electronic apparatus using the same. A liquid crystal display device includes color filter portions each having a plurality of colored layers in a unit pixel and a liquid crystal layer for controlling the amount of light passing through the color filter portions. The color filter portion has in the unit pixel first to third colored layers respectively having first and third peak wavelengths in a wavelength selection characteristic and a fourth colored layer having a peak wavelength between the first peak wavelength and the second peak wavelength, and a peak wavelength of a spectral characteristic of light passing through the liquid crystal layer corresponds to the fourth peak wavelength.

Liquid crystal display device and electronic apparatus

A polymer dispersed liquid crystal (PDLC) display element for use in an electronic apparatus wherein the display element operates in a PDLC mode or reverse PDLC mode providing for reduction of visual display haze, improved display contrast. The particular medium includes a liquid crystal portion and a polymer portion and may include a chiral component. In cases where visual display haze and contract is a particular problem in the utility of the reverse PDLC display element, such as in the case where the display element is combined with a solar battery, a sufficient amount of dichroic dye is added to the liquid crystal portion of the medium, and, further, a compound showing no fluorescence emission with respect to a liquid crystal portion, or a polymer or a chiral polymer precursor portion of the medium, is employed. The resulting electronic apparatus can, therefore, incorporate a reverse PDLC type display element in combination with a solar battery or other component that affects display quality in such elements to improve the overall visual quality and contrast in the display rendering the display more useful in more miniaturized applications.

Polymer dispersed liquid crystal (PDLC) display element for use in an electronic apparatus

Liquid crystal display with mutually oriented and dispersed birefringent

Polymer dispersed liquid crystal (PDLC) display element for use in an

Liquid crystal composite material and liquid crystal display device(s)

Liquid crystal display device and method for producing such

Polymer dispersed liquid crystal display device and method of producing

A polymer dispersed liquid crystal display apparatus has a liquid crystal/polymer medium formed between spatially disposed electrodes formed spatially disposed substrates. The medium includes a polymer phase and a liquid crystal phase having optical axes alignable together in a predetermined direction. A light absorption additive is included in the liquid crystal phase to provide light absorption when said optical axes are aligned in said predetermined direction so that in the presence or absence of an electric field applied between said electrodes, two different conditions are achieved comprising alignment and misalignment of the optical axes of the liquid crystal phase relative to the polymer phase so that in one condition, a light absorption state is created in the medium and in the other condition, a light scattering state is created in the medium. The polymer phase comprises a network including a plurality of continuous strings of particles connected in helicoid formation due to the addition of a chiral component, and this network may also include separate discrete polymer particles. Also a matrix network may be employed. A reflecting surface on the side of the liquid crystal/polymer medium opposite to that of incident light will enhance the light scattering and light absorbing properties in either of the two different conditions. Alternatively, the opposite side may be a white surface providing for a high contrast display with light absorption additive in the medium of dark contrast, such as, black dichroic dye.

Polymer dispersed liquid crystal (PDLC) display apparatus

Growing community of inventors

Suwa, Japan

Eiji Chino