Liquid crystal display apparatus

Abstract

A phase shift element formed on the outer surface of a glass substrate is formed of an organic PAS film, with a refractive index of approximately 1.5. There is atmospheric air (with a refractive index of 1.0) between the phase shift elements. A thickness of the phase shift element is set at 550 nm, a value obtained by substituting 550 nm for a center wavelength and 0.5 for Δn in D1 Δn=center wavelength/2. A phase shift element formed on the inner surface of the glass substrate is an SiN layer (with a refractive index of approximately 2.0). A substance between the phase shift elements is a flattened film which has a heatproof temperature of 600 degrees centigrade or above, a low refractive index, and flattened effect. A thickness of the flattened film may be equal to or larger than a thickness of the phase shift element and thus is set at 550 nm. Through installation of the phase shift elements having a lens effect, light of a back light is efficiently condensed on an aperture part of a pixel, thereby improving the condensation efficiency at the aperture part and increasing an amount of light transmitted through a liquid crystal display panel.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a sectional view describing a first embodiment of a liquid crystal display apparatus according to the present invention;

FIG. 2 is a sectional view describing a second embodiment of the liquid crystal display apparatus according to the present invention;

FIG. 3 is a sectional view describing a third embodiment of the liquid crystal display apparatus according to the present invention;

FIG. 4 is a sectional view describing a fourth embodiment of the liquid crystal display apparatus according to the present invention;

FIG. 5 is a sectional view describing a fifth embodiment of the liquid crystal display apparatus according to the present invention;

FIG. 6 is a sectional view describing a sixth embodiment of the liquid crystal display apparatus according to the present invention;

FIG. 7 is a diagram photographically describing the condition of optical interference at the end part of a phase shift element;

FIG. 8 is a diagram photographically describing effect of light condensation by a phase shift element;

FIG. 9 is a schematic plan view describing an example of arrangement of the phase shift element in a panel; and

FIG. 10 is a development perspective view showing an example of the overall structure of the liquid crystal display apparatus according to the present invention.

Claims

1. A liquid crystal display apparatus, comprising: a liquid crystal display panel having a first transparent substrate, a second transparent substrate so arranged as to oppose the first transparent substrate, and a liquid crystal enclosed between the first transparent substrate and the second transparent substrate; anda back light installed on a back surface of the first transparent substrate of the liquid crystal display panel,wherein the first transparent substrate of the liquid crystal display panel is provided with a phase shift structure, andan amount of light, of illumination light exiting from the back light, transmitted through the liquid crystal display panel is increased by the phase shift structure.

2. The liquid crystal display apparatus according to claim 1, wherein the phase shift structure is provided on an inner surface of the first transparent substrate.

3. The liquid crystal display apparatus according to claim 1, wherein the phase shift structure is provided on the inner surface of the first transparent substrate and on an outer surface opposite to the inner surface.

4. A liquid crystal display apparatus, comprising: a liquid crystal display panel having a first transparent substrate which has a thin-film transistor circuit on an inner surface thereof and a plurality of pixels arranged in a matrix form, a second transparent substrate which has an inner surface thereof so arranged as to oppose the first transparent substrate, and a liquid crystal enclosed between the inner surface of the first transparent and the inner surface of the second transparent substrate; anda back light installed on a back surface of the first transparent substrate of the liquid crystal display panel,wherein the first transparent substrate of the liquid crystal display panel is provided with a phase shift structure, andan amount of light, of illumination light exiting from the back light, transmitted through the liquid crystal display panel is increased by the phase shift structure.

5. The liquid crystal display apparatus according to claim 2, wherein the phase shift structure is provided on the inner surface of the first transparent substrate.

6. The liquid crystal display apparatus according to claim 2, wherein the phase shift structure is provided on the inner surface of the first transparent substrate and on an outer surface opposite to the inner surface.

7. The liquid crystal display apparatus according to claim 4, wherein transmittance of the entire liquid crystal display panel is larger than a product of an aperture ratio of the entire liquid crystal display panel and transmittance of an aperture part.

8. The liquid crystal display apparatus according to claim 7, having, on the inner surface of the first transparent substrate, a pixel electrode connected to the thin-film transistor circuit and having an opposite electrode which generates an electric field for controlling orientation of a molecule of the liquid crystal between the opposite electrode and the pixel electrode.

9. The liquid crystal display apparatus according to claim 7, having, on the inner surface of the first transparent substrate, a pixel electrode connected to the thin-film transistor circuit and having, on the inner surface of the second transparent substrate, a common electrode which generates an electric field for controlling orientation of a molecule of the liquid crystal between the common electrode and the picture element electrode.

10. The liquid crystal display apparatus according to claim 4, having, on the inner surface of the first transparent substrate, a black matrix which blocks out a color filter of a plurality of colors and the color filter.

11. The liquid crystal display apparatus according to claim 4, having, on the inner surface of the second transparent substrate, a black matrix which blocks out a color filter of a plurality of colors and the color filter.