JPS60239710A - Liquid crystal display device - Google Patents

Abstract

PURPOSE:To enlarge a clearly visible angle range by sealing in liquid crystals between two sheets of glass having transparent electrodes, deviating each deflecting plate in deflecting direction by 90 deg. from each other, bonding each plate to both outside of the glass sheets, respectively, and finely roughening the surface of the deflecting plate on the side to be observed. CONSTITUTION:The incident light on the deflecting plate 5 at right angles thereto is deflected with the liquid crystals 3 molecules aligned in parallel to glass sheets 2, 4, and transmitted out of the deflecting plate 6 through the plates 6. The light is scattered with the fine roughness formed on the surface of the plate 6 to enlarge the range of a clearly observable angles, thus permitting the problem of the narrow clearly visible angle range of the liquid crystal display device to be solved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] Liquid crystal display devices are used as display devices for various devices, taking advantage of their low power consumption. Also, in recent years,
Their use as an image display device to replace the cathode ray tube in televisions has been attracting attention, but one challenge is to find a technology to widen the narrow range of clear viewing angles, which is a disadvantage of liquid crystal display devices.

[Prior art]

A conventional liquid crystal display device, as shown in Figures 1-6 and 1-b, consists of two parallel glasses 2 each having transparent electrodes.
, 4, with a liquid crystal 3 sealed between them, and a deflection plate 1 attached to the outside of two glasses 2 and 4 with their deflection axes shifted by 90 degrees from each other.
It consists of 5.

The inner surfaces of the two glasses 2 and 4 are subjected to an alignment treatment such as rubbing, and when no voltage is applied between the two glasses 2 and 4, as shown in Figure 1-6. As shown, the molecules of liquid crystal 3 are regularly arranged in the same direction as the rubbing direction, and the incident light that enters the liquid crystal display device at right angles is transmitted through the two glasses.
The liquid crystals 3 arranged parallel to the planes 2 and 4 are deflected, and light passes through the liquid crystal display device. This time two pieces of glass -2
, 4, when a voltage exceeding the threshold of the liquid crystal is applied, in the case of a liquid crystal with positive anisotropy, the molecules align in the direction perpendicular to the two glasses -2 and 4. In contrast, since the incident light from the light source passes through as is, the incident light is blocked by the two polarizing plates -1 and 5 which are shifted by 90 degrees from each other. Therefore, an arbitrary image can be obtained on the liquid crystal display device depending on whether or not a voltage is applied to the transparent electrode formed depending on the purpose of display. In such conventional liquid crystal display devices, there is a limit to the direction of clear vision, and the more you look away from the direction of the liquid crystal molecules arranged at right angles to the two glasses 2 and 4, the more normal the image will look. Especially when used as an image display device such as a television, it becomes difficult to view due to the limited viewing angle.

〔the purpose〕

An object of the present invention is to improve the problem of the narrow range of clear viewing angles, which is a drawback of such conventional liquid crystal display devices.

〔overview〕

In the present invention, fine irregularities are provided on the surface of the deflection plate 1 on the clear viewing side, and the transmitted incident light is dispersed by the fine irregularities on the surface of the deflection plate 6, thereby widening the range of the clear viewing angle. It is an unfolded liquid crystal display device.

〔Example〕

An embodiment of the invention is shown in FIG.

The incident light entering the liquid crystal display device at right angles is
, 4 is deflected by the molecules of the liquid crystal 6 arranged parallel to each other, and the light passes through the deflection plate 6, but the τ light is dispersed by the fine irregularities formed on the surface of the deflection plate 6. , the range of clear viewing angles is widened [effect] The present invention is intended to improve the narrow range of clear viewing angles for use in image display devices such as Levy cathode ray tubes. This has the effect of making it easier to realize a portable television that takes advantage of its advantages of low power consumption and thinness.

[Brief explanation of the drawing]

FIG. 1 (α) is a diagram showing the arrangement state of liquid crystal molecules in a conventional liquid crystal display device when the voltage is turned off. 1.S-@ coaxial deflection plates that are orthogonal to each other2.4-Glass with transparent electrodes5-Liquid crystalFigure 1Cb) is the liquid crystal component j) alignment state diagram at the time of voltage ionization of a conventional liquid crystal display device. be. FIG. 2 shows an embodiment of the invention. 6- Deflection plate with uneven surfaces Applicant: Suwa Seikosha Co., Ltd. Patent attorney Tsutomu Sasayuki vJZ diagram

Claims (1)

[Claims] This is a liquid crystal display device in which a liquid crystal is sealed inside two pieces of glass with transparent electrodes, and polarizing plates are pasted on both outsides of the two glasses, shifted by 90 degrees from each other.The surface of the deflecting plate on the bright viewing side A liquid crystal display device characterized by having fine irregularities.