Liquid crystal display
AssigneeHitachi Displays, Ltd.
InventorsYuka Utsumi, Makiko Sugibayashi, Ikuo Hiyama, Katsumi Kondo, Mutsumi Maehara
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Abstract
A normally-closed liquid crystal display includes a component to selectively absorb characteristic leakage light occurring at black representation. Therefore, when black is displayed, occurrence of unnecessary leakage light due to partial depolarization of polarized light caused by a component of an LCD panel can be suppressed. It is therefore possible to provide a liquid crystal display in which display performance of black is improved to clearly display black.
Claims8
A liquid crystal display of in-plane-switching type, comprising:
- a normally-closed liquid crystal display panel including a pair of substrates including a polarizer and a liquid crystal layer sandwiched between the pair of substrates;
- a light source unit arranged with respect to a rear surface of the liquid crystal display panel;
- and
- a spectrum absorbing unit arranged between the normally-closed liquid crystal display panel and the light source unit, including a component for absorbing light spectrum within a predetermined range of wavelength propagated from the light source unit to the liquid crystal display panel, by partial depolarization of polarization of a light emitted by the light source unit;
- wherein the absorbing component includes a polyvinyl alcohol macromolecular layer including a pigment having an absorption peak at a wavelength of 490 nm.
A liquid crystal display, comprising:
- a pair of polarizers arranged opposing to each other;
- a pair of substrates arranged opposing to each other, the substrates being in contact with inner sides of the respective polarizers;
- a color filter arranged to be in contact with an inner side of one of the pair of substrates;
- liquid crystal sandwiched between an inner side of the other one of the pair of substrates and the color filter;
- a light emitting component arranged on an outer side of the other one of the pair of substrates for supplying light to the liquid crystal;
- and
- a spectrum absorbing unit including an absorbing component disposed between the other one of the pair of substrates and the light emitting component for absorbing a light spectrum within a predetermined range of wavelength of the light spectrum propagated from the light emitting component to the liquid crystal, the absorbing component including a pigment having dichroism in a wavelength range from 400 nm to 500 nm including a wavelength range greater than 440 nm of light from the light emitting component.
A liquid crystal display of in-plane-switching type, comprising:
- a normally-closed liquid crystal display panel including a pair of substrates including a polarizer and a liquid crystal layer sandwiched between the pair of substrates;
- a light source unit arranged with respect to a rear surface of the liquid crystal display panel;
- and
- a spectrum absorbing unit arranged between the normally-closed liquid crystal display panel and the light source unit, including a component for aborbing light spectrum within a predetermined range or wavelength propagated from the light source unit to the liquid crystal display panel, by partial depolarization of polarization of a light emitted by the light source unit;
- wherein the predetermined wavelength range is a wavelength range from 400 nm to 500 nm including a wavelength range greater than 440 nm.
Dependencies are inferred from the claim text.