JPS58116518A - Liquid-crystal display panel - Google Patents

Abstract

PURPOSE:To increase the area of a display part by adding cholesteric liquid crystal to nematic liquid crystal having negative dielectric anisotropy so that a glass substrate interval and a spiral pitch of liquid crystal are within specific ranges, and using a light- transmittive material for the seal part of glass substrates. CONSTITUTION:Between two glass plates 1a and 1b which have a couple of transparent electrodes 4a and 4b and are oriented vertically, the liquid crystal obtained by adding cholesteric liquid crystal to nematic liquid crystal having negative dielectric anisotropy so that the interval D between the glass plates 1a and 1b and the spiral pitch of the liquid crystal are so specified that D/P is 0.2-1.0 is injected. The seal part 2 of the glass plates 1a and 1b is formed of a light-transmittive material and cross or parallel Nichol elements 4a and 4b are provided with the glass plates 1a and 1b between. Consequently, the cross Nichol elements allow unlighted parts and the seal part 2 to be seen in a blackish state wherein light is shielded to make only lighted display parts transparent, and the parallel Nichol elements allow the both to be seen in a bright state, so they can not be discriminated between. Thus, the effect that the area of the dispaly part is increased is obtained and, specially for a large-sized panel, the seal part is extended to an unlighted part in the dispaly part to provide leg parts 8, uniforming the thickness of the liquid crystal.

Description

[Detailed description of the invention] The present invention relates to a liquid crystal display spring μ.

Currently, in the liquid crystal display spring μ, T-N type σ1
Nematic [crystal display spring] is the mainstream. This involves injecting a nematic liquid crystal with positive dielectric anisotropy between a pair of horizontally aligned horizontally aligned glass plates with a pair of transparent electrodes, twisting the so@front and rear liquid crystals using Fubingco V steric liquid crystal, and adding polarizing plates. Cross Nico μ or Parallel Nico μ
The configuration is as follows. In this conventional configuration, when the polarizing plate is in a crossed-Nico mode, the seal portion blocks light and appears black, but the display portion transmits light and becomes transparent. Also, in Parallel Niko P, the second part of the sea is transparent.

The display becomes blackish.

In this way, in the conventional configuration, the seal part and the display part look different due to the optical rotation of the liquid crystal, so the seal part must be located outside the display area, so the position 1 width of the seal part is fixed. It's coming.

This may be difficult to manufacture and may be unfavorable from the viewpoint of reliability. On the contrary, if these are emphasized, the area of the display section must be reduced.

Therefore, the present invention provides a nematic liquid crystal with negative dielectric anisotropy in the darkness of a vertically aligned glass plate having at least one pair of transparent electrodes, where D7 is the distance between the glass plates, and P is [Spiral pitch of liquid crystal] 6 tons of ericholesteric liquid, which corresponds to the range of 2-trace, is injected, and the y-μ portion of the glass plate is formed of a translucent material, and a polarizing plate is sandwiched between the glass plates. By arranging the cross Nico A/ or parallel two y, the \-shi part and the non-lit display part can be made to look the same, and can be placed inside the upper display area of the y-w part. Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

Jg1 diagram ωυ is a cross-sectional view and a plan view of a small liquid crystal display panel, and s (1 m) (lb) is a glass plate subjected to vertical alignment treatment, and the space between (nohato glass plate (1 m) and (X k ) At the V-y section, a glass plate (31m) (Sb) made of nearly colorless and transparent glass plate (1 maple) (1
b%: Provided with 9 pairs of transparent [@, (4m) (41>M
ri a x = :I A/j or a Confucian board arranged in parallel μ, (S) is the glass plate (1 m) (lk) and V
- The liquid crystal injected into the space formed by the μ section Q, the cholesteritter liquid crystal is added to the nematitter liquid crystal with negative dielectric anisotropy at the interval a' between D/P (D 1 gas IE (1 + a) lb) ? Inject a good material so that the helical pitch of the liquid crystal is between 62 and LO. At this time, the ats) Fi sealing part may be formed by fitting the pipe at nine angles that match the pitch and applying a rye-tilt.

Because of this configuration, 1, for example, the polarizing plate (4a) and (4
b) When facing the T-Talos Niko K, both the non-lit display part and the V-~Baku) appear blackish in a state where light is blocked, and only the lit display part becomes transparent. On the other hand, in the case of parallel Nico~, both the non-lit display part and the second part are transparent, and only the lit display part becomes blackish with the light blocked. In this way, the non-lit display part surrounding part (2) is in the same state and cannot be visually distinguished.

Therefore, the display area (V-A' section Q) can be used even for the base not used for lighting the display.

Sea 2 portion (2) can be used as a display area. A similar effect can be obtained in the case of parallel Nicols.

Moreover, in this way, the liquid crystal display spring V of the present invention has a V-μ portion (
This is because it is possible to make the main and non-lit display parts the same.

Particularly when creating a large spring μ, as shown in Figure 4, the glass plate (11
) (1b) It is possible to make the 0ffl spacing uniform.

Six-reduced spring A/l - easy to make.

As explained below, according to the liquid crystal display spring μ of the present invention, V
- Since the μ section and the non-lit display section can be in the same state, the seal section can be located inside the display area. Therefore, it is no longer necessary to limit the width at one position of the V-μ section or to narrow the area of the display section as in the prior art, which facilitates manufacturing and improves reliability.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view and a plan view of an embodiment of the liquid crystal display spring PVTV according to the present invention, and FIG. 2 is a cross-sectional view and a plan view showing the shape of two parts of the seam in the case of a large spring p. (la) (lb) = glass plate, C11-V-4' section, (
:4m)(lb)...Transparent electrode, (4m)(4b)=
Polarizing plate, (i)・1 liquid crystal, (ma)・-display area partial agent Yoshihiro MorimotoFigure 1Figure 2

Claims (1)

[Claims] L is a nematic liquid crystal having negative dielectric anisotropy between vertically aligned glass plates having at least one pair of transparent electrodes [where D is the distance between the glass plates and P is the liquid crystal Cholesteric liquid crystal is injected so that the helical pitch] is in the range of 02 to LQ7), and the sea area of the glass plate is formed of a translucent material. Liquid crystal display spring V arranged in μ or parallel μ.