Liquid crystal display with curved liquid crystal screen

Details Liquid crystal display with curved liquid crystal screen Liquid crystal display with curved liquid crystal screen

1998-10-21

2001-12-25

Spyrou, Cassandra (Department: 2872)

Illumination

Revolving

C362S084000, C349S064000, C349S065000

Reexamination Certificate

active

06332690

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a “liquid crystal (hereafter sometimes called LC) display” (hereafter sometimes “LCD”), and particularly, to an LCD with a curved LC screen.
2. Description of Relevant Art
FIG. 1
illustrates a conventional LCD with a typical flat configuration.
The conventional LCD comprises a flat LC screen
1
and a flat back light unit
2
. The LC screen
1
is comprised of a matrix of LC pixels each including a pair of transparent electrodes with an intervening body of LC and an associated thin film transistor circuit, and a corresponding lattice of horizontal and vertical signal lines. The back light unit
2
is comprised of a light source
11
, a reflector
10
, a light transmitting plate
9
, a scattering or distributing sheet
8
, and a prism sheet
7
.
A recent LC screen is flexible, and naturally deforms along a curved surface, without undue distortion. However, the back light unit
2
is inflexible, as the light transmitting plate
9
has a varied optical characteristic if flexed.
SUMMARY OF THE INVENTION
The present invention has been achieved with such points in view.
It therefore is an object of the present invention to provide an LCD with a curved LC screen, permitting a curved picture to be displayed without suffering from a varied or non-uniform optical characteristic.
To achieve the object, a first aspect of the invention provides an LCD comprising a curved LC screen and a flexible light emitting sheet curved along the curved LC screen.
According to this aspect of the invention, a flexible light emitting sheet constitutes a back light curved along a curved LC screen, with a flexible adaptation to a variety of desirable configurations in a simplified constitution. The light emitting sheet may be a single, even for a curved meter display such as for an instrument panel of an automobile.
According to a second aspect of the invention, the flexible light emitting sheet comprises a single sheet of a flexible transparent resin with a system of monoxide silicon particles mixed therein.
According to this aspect of the invention, a flexible body of a transparent resin is configured as a single sheet, and adapted for brightness control, an even distribution and a transmission of light, to provide a thin display with a simple constitution.
According to a third aspect of the invention, the flexible light emitting sheet comprises an electroluminescent substance relatively high of brightness.
According to this aspect of the invention, a light emitting sheet flexible to provide a curved light emitting surface is rendered electroluminescent with high brightness, and can emit a competent quantity of light without assistance from an additional light source.
According to a fourth aspect of the invention, the flexible light emitting sheet comprises a flexible transparent resin sheet and a set of light emitting diodes (hereafter, simple “LED”) arranged thereon in a plane conforming manner.
According to this aspect of the invention, a set of LED's for a planer application are arranged in conformity with a configuration of a back side of a flexible transparent resin sheet in a facilitated manner.
According to a fifth aspect of the invention, the LCD further comprises a meter display panel for a vehicle, the meter display panel including the LC screen.
According to this aspect of the invention, a meter display panel of a vehicle has a curved display surface, of which some essential part may appear in a normal or straight sight angle of any passenger in the vehicle, allowing for the passenger to have a significantly relaxed, service-sharing, tireless observation, in particular in a rally or the like.
According to a sixth aspect of the invention, the LCD further comprises a connector housing member formed with a curved front face for the flexible light emitting sheet to rest thereon.
According to this aspect of the invention, a curved light emitting sheet fits on a curved front face of a connector housing member that may be employed for electrical connection to the LC screen.


REFERENCES:
patent: 4804254 (1989-02-01), Doll et al.
patent: 5613751 (1997-03-01), Parker et al.
patent: 5847783 (1998-12-01), Hiramoto et al.
patent: 5993020 (1999-02-01), Koike

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