JP2002014340A - Liquid crystal panel and image display application device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To shield light leaking from a peripheral portion of a liquid crystal panel to a pixel from the outside of the display portion other than the display portion, and irregularly reflected light thereof. SOLUTION: A light shielding member 11 is provided on an outer peripheral portion of a liquid crystal panel 12 and an edge portion thereof. As the light shielding member 11, a member that does not transmit light from all directions is used. Light shielding member 1
1, the light leaking from the light source member 13 to the pixels can be blocked.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal panel used for a display section of an image display application device, and more particularly to light shielding of a liquid crystal panel.

[0002]

2. Description of the Related Art A conventional liquid crystal panel will be described below. FIG. 2 shows a conventional liquid crystal panel structure. Broadly speaking,
It is composed of two parts. In FIG. 2, a first light-transmitting substrate having a thin film transistor on one surface and a second light-transmitting substrate having three primary color filters on one surface are opposed to each other. A panel 21 having a liquid crystal layer and having a sealing resin portion for sealing and holding the liquid crystal layer. The light source unit 22 is a member that supplies light for projecting an image on a panel, and has a structure in which the panel 21 is provided on the light source unit 22.

The operation of the liquid crystal panel configured as described above will be described below. The light for projecting an image by the light source member is transmitted to the liquid crystal panel 21.
From the opposite surface of the first light-transmitting substrate having the thin film transistor, and is transmitted to the second light-transmitting substrate having the color filter by using the switching characteristics of the thin film transistor to form an image on the observer side. Configuration.

[0004]

However, in the above-mentioned structure of the prior art, since the material constituting the thin film transistor has a characteristic dependent on the intensity of incident light, leakage from the light source member to the pixels from outside the display portion other than the display portion. There is a disadvantage that the current increases when the switching characteristics of the thin film transistor are in the off state due to the light and the irregularly reflected light. The display on the liquid crystal panel becomes white on the outer peripheral portion of the display portion, causing a problem in display quality.

The present invention solves the above-mentioned conventional problems. The first light-transmitting substrate leaks light from the light source member to the pixels from outside the display portion other than the display portion, and further enters the diffusely reflected light. It is an object of the present invention to provide a liquid crystal panel which prevents the liquid crystal panel from being used.

[0006]

In order to achieve this object, a liquid crystal panel according to the present invention comprises a first light-transmitting substrate having a thin film transistor on a display portion on one surface, and a second light-transmitting substrate. And a liquid crystal layer, a sealing resin portion, a light source portion, and a light blocking member, and one of the surface having the display portion of the first light transmitting substrate and one of the second light transmitting substrate. The surface is provided to face with a gap portion, the gap portion includes the liquid crystal layer and the sealing resin portion, the sealing resin portion is the first light-transmitting substrate and the second The liquid crystal layer is provided so as to be sealed at a position of an outer peripheral portion of the gap between the light-transmitting substrate, an end surface portion of an outer peripheral portion of the first light-transmitting substrate, and the second An end surface portion of an outer peripheral portion of the translucent substrate, an outer peripheral portion of the sealing resin portion, and an outer peripheral portion of the first translucent substrate opposite to the surface having the liquid crystal layer are represented. To the end of the portion of the second light-transmitting substrate facing the thin-film transistor, and to the end of the portion of the display portion facing the thin-film transistor at the outer peripheral surface opposite to the surface having the liquid crystal layer. The light-shielding member is provided, and the light source unit is provided on a surface of the second light-transmitting substrate opposite to the surface having the liquid crystal layer.

Further, the light-shielding member is a paint having a light-shielding property.

Further, the light-shielding member is a tape having a light-shielding property and having an adhesive property on one side.

The light-shielding member is a thin film having a light-shielding property.

According to another aspect of the present invention, there is provided an image display application device having the liquid crystal panel according to any one of the first to fourth aspects.

The light-shielding member for reducing an increase in current when the switching characteristic of the thin-film transistor is in an off state due to light leaking from the light source member to the pixel from outside the display portion and irregularly reflected light thereof is provided with the second light-transmitting member. The configuration includes a substrate end outer peripheral portion, the sealing resin region outer peripheral portion, and a thin film transistor end which is a display region end opposite to the surface of the first light-transmitting substrate having the liquid crystal layer.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 illustrates the invention,
A panel in which a glass substrate on which a thin film transistor is formed on one side and a color filter is formed on the other side, a sealing resin portion for holding a liquid crystal layer, a light source portion, and a light-blocking member for pixels are provided. It is sectional drawing of a liquid crystal panel. In FIG. 3, reference numeral 31 denotes a light-shielding member, 32 denotes a panel obtained by bonding two glass substrates and having the sealing resin portion,
Reference numeral 33 denotes a light source unit, and reference numeral 34 denotes an end of a display area. The above is the same as the configuration in FIG. In FIG. 1, a first light-transmitting substrate having a thin film transistor on one surface, a second light-transmitting substrate having three primary color filters on one surface, a liquid crystal layer, and a seal holding the liquid crystal layer. A resin region, a light source unit 13,
A light-shielding member for reducing an increase in current when the switching characteristic of the thin-film transistor is in an off state due to light leaked from the light source member to the pixel from outside of the display unit and irregularly reflected light; The substrate and the second light-transmitting substrate are opposed to each other, the liquid crystal layer is provided in a gap between the opposed surfaces, and the light source unit is a surface opposite to the surface of the first light-transmitting substrate having the liquid crystal layer. And the leak light incident / blocking member 11 has a display region end 14 opposite to the surface of the sealing resin region having the liquid crystal layer and opposite to the surface of the first light transmitting substrate having the liquid crystal layer. FIG. 3 is a cross-sectional view of the liquid crystal panel 12 provided up to the thin film transistor end. That is, the light shielding member 11 is provided on the outer peripheral portion of the liquid crystal panel 12 and the edge portion thereof.
For the liquid crystal panel configured as described above,
The operation will be described below. Light for projecting an image by the light source member 13 is incident on the liquid crystal panel 12 from the surface opposite to the surface of the first light-transmitting substrate having the liquid crystal layer, and the switching characteristics of the thin film transistor are changed. Utilizing, light is transmitted from a light source to a second light-transmitting substrate having color filters of three primary colors to be displayed.

Light source member 13 according to an embodiment of the present invention
As a result, the light leaked from the outer periphery of the liquid crystal panel to the pixel from the outside of the display portion other than the display portion and the irregularly reflected light are not reflected in the pixel by the light shielding member 11, and as a result, the switching characteristics of the thin film transistor can be maintained in the off state. ,
The effect of light leaked to the pixel from the outside of the display unit and the irregularly reflected light is eliminated, and a low current effect is obtained.

The light-shielding member 11 in the embodiment of the present invention may be any member that does not transmit light from all directions. Further, the light shielding member 11 may be a paint having a light shielding property. Further, the light shielding member 11 may be a tape having a light shielding property. Further, the light shielding member 11 may be a metal thin film. Needless to say, the light may be shielded, including the thin film transistor pixels as required according to the panel size and light source intensity.

[0015]

As described above, according to the present invention, by providing a light-shielding member, light leakage from the outer periphery of the liquid crystal panel due to the light source member to the pixel from outside the display portion and irregularly reflected light thereof are blocked, and the thin film transistor switching is performed. An off state of the characteristic can be realized. In terms of image quality, the liquid crystal panel can be displayed in black instead of white at the outer peripheral portion, so that the display quality of the liquid crystal panel can be improved and the industrial value is great.

[Brief description of the drawings]

FIG. 1 is a sectional view of a configuration according to a first embodiment of the present invention.

FIG. 2 is a diagram for explaining a conventional liquid crystal panel.

FIG. 3 is an image diagram for explaining an operation of blocking leakage light according to the first embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Light-shielding member 12 Liquid crystal panel 13 Light source member 14 Display area end 21 Liquid crystal panel 22 Light source member 31 Light-shielding member 32 Liquid crystal panel 33 Light source member 34 Display area end

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2H091 FA34Z FA42Z FB02 FB08 FD06 FD12 FD15 FD21 GA13 GA17 LA03 LA11 5C094 AA16 BA03 BA43 DA07 DA13 EA04 EA07 EB02 ED15

Claims (5)

[Claims] 1. A first light-transmitting substrate having a thin film transistor on a display portion on one surface, a second light-transmitting substrate, a liquid crystal layer, a sealing resin portion, a light source portion, and a light-shielding member. And a surface having a display portion of the first light-transmitting substrate and one surface of the second light-transmitting substrate are provided to face each other with a gap, and the gap is provided in the gap. Comprising the liquid crystal layer and the sealing resin portion, wherein the sealing resin portion at the outer peripheral portion of the gap between the first light-transmitting substrate and the second light-transmitting substrate The liquid crystal layer is provided so as to be sealed, an end surface portion of an outer peripheral portion of the first light-transmitting substrate, an end surface portion of an outer peripheral portion of the second light-transmitting substrate, and the sealing resin portion. An outer peripheral portion, an end portion of a portion of the display portion opposite to the thin film transistor at an outer peripheral portion opposite to a surface having the liquid crystal layer of the first light-transmitting substrate, and The light-shielding member is provided so as to cover an outer peripheral portion of the surface of the light-transmitting substrate opposite to the surface having the liquid crystal layer up to an end of a portion of the display portion facing the thin film transistor; A liquid crystal panel comprising the light source unit on a surface of a substrate opposite to a surface having a liquid crystal layer. 2. A liquid crystal panel, wherein the light-shielding member according to claim 1 is a paint having a light-shielding property. 3. A liquid crystal panel, wherein the light-shielding member according to claim 1 is a tape having a light-shielding property and having an adhesive property on one side. 4. A liquid crystal panel, wherein the light shielding member according to claim 1 is a thin film having a light shielding property. 5. An image display application device comprising the liquid crystal panel according to claim 1.