JPS59189325A - liquid crystal display device - Google Patents

Abstract

PURPOSE:To form a liquid crystal display device with which a display providing good visibility is obtd. even if the display is observed through sunglasses by providing a biaxially stretched film having an optical biaxial characteristic on an upper polarizing plate. CONSTITUTION:An upper polarizing plate 3 and a lower polarizing plate 4 are provided on each of two sheets of an upper glass substrate 1 and a lower glass substrate 2 which have transparent conductive films and sandwich a liquid crystal material; further a biaxially stretched film 5 having an optical biaxial characteristic is disposed on said plate 3. A high polymer film of, for example, PE, polyester, etc. is used for the film 5. The liquid crystal display device consists of such constitution in which the film 5 is disposed on the plate 3 and therefore even if the polarizing axes of the plate 3 and sunglasses intersect orthogonally with each other in the case of observing the display of said device through the sunglasses, light is polarized by the film 5 to permit transmission of the light through the plate 3 and the layer of the sunglasses and the display providing good visibility is obtd. The effect of preventing reflection of light is obtd. by forming the surface of the film 5 as a diffusive surface.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device suitable for viewing a display through sunglasses.

[Prohibition of invention]

Conventional liquid crystal display devices consist of a transparent 4' panel holding liquid crystal material between them.
An upper polarizing plate and a lower polarizing plate full-width upper f
lij: Since the display is made of such a compact structure, when observing the display through sunglasses, the display becomes difficult to see if the mutual arrangement of the polarization axis of the upper polarizing plate and the polarization axis of the sunglasses changes. This occurs because polarizers and sunglasses exhibit optical characteristics of 1%. In particular, if the polarization axes of both are aligned, the visibility of the display will deteriorate significantly because the light will not be transmitted through both layers.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device that provides a display with good 4δ visibility even when the display is viewed through sunglasses.

[The Princess of Invention]

In the present invention, a biaxial stretched film having optical biaxial characteristics is provided on the upper polarizing plate. I'm happy.

[Embodiments of the invention]

An embodiment of the present invention will be explained below with reference to FIGS. 1 and 2. An upper light plate 3 and a lower polarizing plate 4 are provided on each of the two upper glass substrates l and lower glass substrate 2, each having a transparent conductive film sandwiching a liquid crystal material therebetween. 2 N, 41 with two-axis characteristics
A stretched film 5 is provided. As the biaxially stretched film 5, for example, a polymer film such as polyethylene or polyester is used.

Since the biaxially stretched film 5 is disposed on the upper polarizing plate 3 in this manner, when viewing the display of a liquid crystal display device having such a structure through sunglasses, the polarized light between the upper polarizing plate 3 and the sunglasses Even if the number of axes is 11, the light is polarized by the biaxially stretched film 5 and can be transmitted through the upper polarizing plate 3 and the sunglasses layer, so that a highly visible display can be obtained. Further, by making the surface of the biaxially stretched film 5 a diffusing surface, an effect of preventing light reflection can be obtained. Furthermore, since the upper polarizing plate 3 is protected by the 2-1 abrasive film 5, the mechanical, environmental and chemical resistance properties of the upper polarizing plate 3 are improved. Further, when the biaxially stretched film 5 is colored with a transparent color, a liquid crystal display device having a color function can be obtained.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, since the 24111 processed film is provided on the upper polarizing plate,
Even when observing the display on the liquid crystal display device through sunglasses, a display with good visibility can be obtained.

[Brief explanation of the drawing]

The figure shows an embodiment of the liquid crystal display device g according to the present invention.
Figure fλ1 is a front view, and Figure 2 is a side view. ■・・・Top glass substrate, 2-curve lower glass substrate, 3.
...Top polarizing plate, 4...Top polarizing plate, 5...
Biaxial stretched film.

Claims (1)

[Claims] In a liquid crystal display device W in which an upper polarizing plate and a lower polarizing plate are arranged on each of two upper glass substrates and a lower glass substrate each having a transparent 4-electrode conductor sandwiching a liquid crystal material, the upper polarizing plate A liquid crystal display device characterized in that a biaxially stretched film having optical biaxial characteristics is provided thereon.