Liquid crystal cells – elements and systems – Particular structure – Having significant detail of cell structure only
Reexamination Certificate
1999-08-17
2001-07-31
Ton, Toan (Department: 2871)
Liquid crystal cells, elements and systems
Particular structure
Having significant detail of cell structure only
C349S155000
Reexamination Certificate
active
06268896
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a liquid crystal display and to a manufacturing process thereof.
2. Prior Art
FIG. 17
is a schematic plan view showing a liquid crystal display panel of a conventional liquid crystal display, FIG.
18
(
a
) is a schematic sectional view taken along the line J—J of
FIG. 17
, and FIG.
18
(
b
) is a schematic sectional view taken along the line K—K of FIG.
17
.
In the drawings, reference numerals
1
and
2
indicate a first substrate and a second substrate oppositely arranged; numeral
3
a
indicates a shade film formed on the first substrate
1
; numeral
4
indicates a seal resin of ultraviolet ray hardening type; numeral
5
indicates a display electrode for displaying a picture formed on the second substrate
2
; numeral
6
indicates a display electrode, electrode leading wire, insulating film, etc. (hereinafter referred to as electrode leading wire, etc.) formed on the outside of a display region of the second substrate
2
; and numeral
7
indicates ultraviolet rays with which the seal resin
4
is irradiated for hardening.
In the conventional liquid crystal display of above arrangement, the first substrate
1
and the second substrate
2
arranged oppositely are adhered to each other, and the seal resin
4
of ultraviolet ray hardening type for sealing a liquid crystal held between the first substrate
1
and the second substrate
2
is applied to a transparent portion where at least either the first substrate
1
or the second substrate
2
is transparent, and the applied seal resin
4
is hardened from the transparent substrate side by irradiation with the ultraviolet rays
7
. In addition, as a film for shading the ultraviolet rays such as electrode leading wire, etc.
6
is formed in the peripheral portion of the second substrate
2
, the irradiation with the ultraviolet rays
7
is generally performed from the first substrate
1
side.
Since the conventional liquid crystal display is arranged as mentioned above, as shown in FIG.
18
(
a
), in the peripheral portion of the first substrate
1
, it is necessary to secure a transparent portion having a width Q for irradiating the seal resin
4
with the ultraviolet rays
7
on the outside of a portion where the shade film
3
a
having a width P for shading a display region is formed. Thus, it is necessary for a width R of a frame region being an outer periphery of the display region to have a width formed by putting together the width P and the width Q. Hence, a problem exists in that the liquid crystal display cannot be small-sized.
Further, when making small the width R of the frame region of the outer periphery of the display region while securing the width Q of the transparent portion for irradiating the seal resin
4
with the ultraviolet rays
7
, the region for forming the shade film
3
a
to shade the periphery of the display region becomes insufficient. Hence, another problem exists in that a light leak takes place in the peripheral portion of the display region, eventually resulting in poor display quality.
Furthermore, when the irradiation with the ultraviolet rays
7
is performed from the second substrate
2
side where the shade film
3
a
for shading the periphery of the display region is not formed, the ultraviolet rays are shaded by the electrode leading wire, etc.
6
formed in the peripheral portion of the second substrate
2
. Hence, a further problem exists in that the hardening of the seal resin
4
at this portion is not perfect.
SUMMARY OF THE INVENTION
The present invention was made to solve the above-discussed problems and has an object of providing a small-sized liquid crystal display in which the frame region of the outer peripheral portion of the display region is made small without any light leak at the peripheral portion of the display region. Another object of the invention is to provide a manufacturing process suitable to such a liquid crystal display.
To accomplish the foregoing object, a liquid crystal display according to the invention comprises: a first substrate having a shade film formed in contact with an outer edge portion of a display region; a second substrate having a display electrode for displaying on a picture plane, an electrode leading wire having a shading characteristic and lead from the display electrode to outside of the display region, and a shade film formed on the outside of the display region; and a seal resin of ultraviolet ray hardening type to adhere said first substrate and the second substrate oppositely to each other and for sealing a liquid crystal held between the first substrate and the second substrate; in which the shade film formed on the first substrate and the shade film formed on the second substrate are formed to be continuous between the first substrate and the second substrate oppositely arranged, the shade film is formed either on the first substrate or on the second substrate in a portion where the seal resin is applied, and ultraviolet rays can transmit through the remaining substrate.
Another liquid crystal display according to the invention comprises: a first substrate having a shade film formed in contact with an outer edge portion of a display region; a second substrate having a display electrode for displaying on a picture plane and a shade material such as electrode leading wire lead from said display electrode to outside of the display region; a seal resin of ultraviolet ray hardening type for adhering said first substrate and the second substrate oppositely to each other and for sealing a liquid crystal held between the first substrate and the second substrate; and a plurality of slits formed on the shade film and on the shade material for transmitting ultraviolet rays to a seal resin applied portion; in which the slits are arranged alternately between the first substrate and the second substrate arranged oppositely.
It is preferable that the slits are arranged alternately between the first substrate and the second substrate arranged oppositely in the seal resin applied portion, and the ultraviolet ray transmitting portions thereof are formed to be continuous.
It is preferable that the slits are arranged alternately between the first substrate and the second substrate arranged oppositely in the seal resin applied portion, and the ultraviolet ray transmitting portions thereof are formed to be discontinuous.
It is preferable that the slits are formed into an optional secondary dimensional shape as occasion demands.
A manufacturing process of a liquid crystal display according to the invention includes a step of hardening a seal resin of ultraviolet ray hardening type applied for adhering a first substrate and a second substrate by irradiating two surfaces of the overlapped first and second substrates with ultraviolet rays.
It is preferable that the irradiation of the overlapped first and second substrates with the ultraviolet rays is performed simultaneously from two sides.
It is preferable that the irradiation of the overlapped first and second substrates with the ultraviolet rays is performed alternately one side after another.
The manufacturing process includes a step of irradiating only the seal resin applied portion with the ultraviolet rays to harden the seal resin applied for adhering the overlapped first and second substrates to each other.
It is preferable that the irradiation of the overlapped first and second substrates with the ultraviolet rays is performed through a shade plate having an ultraviolet ray transmitting region at the seal resin applied portion.
It is preferable that the irradiation of the overlapped first and second substrates with the ultraviolet rays is performed by inducing the ultraviolet rays to the seal resin applied portion through a fiber, etc.
The manufacturing process includes a step of performing a heat treatment, after the irradiation with the ultraviolet rays using any of said process, using a seal resin of ultraviolet ray reaction inducing and thermosetting type.
In the invention, since the shade films for s
Mizunuma Masaya
Morii Yasuhiro
Takasaki Ichiro
Kabushiki Kaisha Advanced Display
McDermott & Will & Emery
Ton Toan
LandOfFree
LCD having slits formed on shade film and shade wiring does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with LCD having slits formed on shade film and shade wiring, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and LCD having slits formed on shade film and shade wiring will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2465713