Liquid crystal display element

Details Liquid crystal display element Liquid crystal display element

1998-10-21

2002-06-04

Ton, Toan (Department: 2871)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S187000

Reexamination Certificate

active

06400431

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display element formed by bonding a planar micro-lens array onto a liquid crystal panel.
2. Description of Related Art
As shown in
FIGS. 7 and 8
, a liquid crystal display element is formed by bonding a planar microlen array
200
onto a liquid crystal panel
100
. A gap is formed between the glass substrates
101
and
102
by a spacer
103
. The liquid crystal
105
is poured into the gap. On a surface of the glass substrate
101
, opposing a electrodes
101
a
are formed on the side of the liquid crystal
105
. On a surface of the other glass substrate
102
transparent pixel electrodes
102
a
are formed on the side of the liquid crystal
105
. Further, additional portions other than the transparent pixel electrodes
102
a
are formed which are not transparent, such as wiring, TFTS (thin film transistors), etc.
Recessed portions are formed on the glass substrate
201
. A resin of high refractive index is filled into and cured in the recessed portions, thereby obtaining a large number (a plurality) of small convex lens
202
which are bonded onto the liquid crystal panel
100
by a bond comprising a resin of low refractive index. The low refractive index serves to focus irradiated light through each of the plural convex lens into pixel electrodes (i.e., openings for the pixels)
102
a
, so as to increase the brightness of an image projected upon the screen.
As another method of providing a large number of convex lens in the planar micro-lens array, the plural microlenses can also be directly formed a stamper by performing a stamping process on the surface of a glass substrate without forming recessed portions on the glass substrate.
In the case of bonding a planar micro-lens array
200
onto a liquid crystal panel
100
, if the position is off or if the two are misaligned, it becomes impossible to obtain correct focusing of the light irradiated onto the pixel electrodes (i.e., the openings for the pixels)
102
a.
Therefore, in the conventional art, marks
203
are formed in four corners at the same time when a large number of convex lens
202
are formed i.e., sequentially. As shown in
FIG. 8
, a planar microlens array
200
and a liquid crystal panel
100
are made to fit together by aligning marks
104
with the marks
203
, in which the marks
104
are formed on the bonding surface of the liquid crystal panel
100
in advance.
The marks
203
, formed on the side of the planar microlens array
200
, are formed with a resin of high refractive index. Therefore the marks
104
on the side of the liquid crystal panel
100
can be seen through the marks
203
which act as convex lens. As a result, it is difficult to fit the marks exactly.
SUMMARY OF THE INVENTION
To resolve the problem described above, the present invention includes a liquid crystal display element formed by bonding a planar microlens array onto a liquid crystal panel, comprising a plurality of convex lens and a first mark formed on the surface of said planar microlens array with a resin of high refractive index, and a second mark which corresponds to the first mark on the planar microlens array formed on the surface of the liquid crystal panel, wherein said first and second marks have corresponding forms so as to precisely fit and align the planar microlens array with the liquid crystal panel, by placing one of the first mark and the second mark into the space formed with the other of the first and the second mark.
The second mark on the side of the liquid crystal panel can be seen through the flat part which does not act as a lens of the planar microlens array, and therefore, easily aligning the planar array and panel.


REFERENCES:
patent: 4634227 (1987-01-01), Nishimura et al.
patent: 5225935 (1993-07-01), Watanabe et al.
patent: 5548372 (1996-08-01), Schroeder et al.
patent: 5850276 (1998-12-01), Ochi et al.

Affiliated with

Also associated with

Rating

Liquid crystal display element does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Liquid crystal display element, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid crystal display element will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2961079