CN202421680U

CN202421680U - Passive liquid crystal display without visual angle blind area

Info

Publication number: CN202421680U
Application number: CN2011205330495U
Authority: CN
Inventors: 徐洪亮; 王晓燕; 赵红霞; 王永波
Original assignee: HEBEI JIYA ELECTRONICS CO Ltd
Current assignee: HEBEI JIYA ELECTRONICS CO Ltd
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-09-05
Anticipated expiration: 2021-12-19

Abstract

The utility model provides a passive liquid crystal display without a visual angle blind area and belongs to the technical field of optics. The technical scheme is as follows: the passive liquid crystal display without the visual blind area comprises an upper glass substrate, a lower glass substrate, and a negative liquid crystal layer sandwiched between the upper glass substrate and the lower glass substrate, wherein the upper glass substrate is parallel to the lower glass substrate; an upper ITO (Indium Tin Oxide) electrode and an upper PI (Polyimide) coating are sequentially arranged on the lower surface of the upper glass substrate, and an upper polarizer is arranged on the upper surface of the upper glass substrate; a lower ITO electrode and a lower PI coating are sequentially arranged on the upper surface of the lower glass substrate, and a lower polarizer is arranged on the lower surface of the lower glass substrate, and after improvement, a plurality of parallel hollow lines are arranged in the middle part of each display block of the lower ITO electrode or the upper ITO electrode. The lower ITO electrode with hollow lines or the upper ITO electrode with hollow lines is adopted in the utility model, and electric field lines at the edges of the hollow lines are deformed to result in deflection of liquid crystal molecules on this location at different angles under an electrified state, so lights passing through a liquid crystal box exist in various visual angles, which further eliminates the visual angle blind area of the liquid crystal display and improves the display effect of the liquid crystal display.

Description

A kind of passive LCD that does not have the blind area, visual angle

Technical field

The utility model relates to a kind of passive driven vertical aligned liquid crystal display that does not have the blind area, visual angle, belongs to optical technical field.

Background technology

Vertically aligned liquid crystal display generally comprises two parallel glass substrates and is clipped in the negative liquid crystal layer between them; Being provided with the ITO electrode successively is the PI coating of vertical orientated and parallel friction in the inboard of two glass substrates (near the one side of negative liquid crystal layer) with tilt angle, and two glass substrate outsides (away from the one side of negative liquid crystal layer) respectively are provided with a polaroid.When not powering up; Liquid crystal molecule does not change the polarization of incident light state perpendicular to glass substrate perpendicular to glass substrate (as shown in Figure 1), under the situation of polaroid quadrature up and down; Light can not pass liquid crystal cell, and the demonstration block of answering with this electrode pair looks it is dark; After powering up, the negative liquid crystal molecule receives electric field action, in the plane that the frictional direction and the electric field line of PI coating are confirmed; To perpendicular to direction of an electric field deflection, make liquid crystal molecule on plane, have perpendicular to this place's electric field certain-length projection (as shown in Figure 2 because the effect on border; After passive vertical orientated liquid crystal display powered up, liquid crystal molecule was not complete level, but has certain inclination angle); To producing birefringence from following polaroid incident polarized light; The polarization direction that makes emergent ray is with respect to the incident ray half-twist, from following polaroid mutually the last polaroid of quadrature penetrate, show block looks it is bright.

Each of the passive vertical orientated liquid crystal display of tradition shows that the electrode of ITO up and down of block all adopts even electrode; All liquid crystal molecules that power up the same demonstration block in back are parallel to each other; Therefore the polarization direction that is parallel to the liquid crystal molecule incident polarized light will not deflect, and can't pass liquid crystal cell.That is to say no matter whether power up, see, show that block looks always dark, form blind area, so-called visual angle, had a strong impact on the display effect of liquid crystal display along the direction that is parallel to liquid crystal molecule.Therefore, how eliminating the blind area, visual angle of existing passive vertical orientated liquid crystal display, improve its display effect, is the present problems that face of relevant technologies personnel.

The utility model content

The purpose of the utility model be to overcome prior art deficiency, a kind of passive LCD that does not have the blind area, visual angle is provided, to improve the display effect of LCD.

The purpose of the utility model realizes with following technical proposals:

A kind of passive LCD that does not have the blind area, visual angle; Comprise top glass substrate, the lower glass substrate that is parallel to each other in the formation and be clipped in the negative liquid crystal layer between the two; Be provided with ITO electrode and last PI coating successively at the lower surface of top glass substrate, upper surface is provided with polaroid; Be provided with ITO electrode and following PI coating down successively at the upper surface of lower glass substrate, lower surface is provided with down polaroid, after the improvement, following ITO electrode or on the middle part of each demonstration block of ITO electrode be provided with a plurality of parallel hollow out lines.

The passive LCD of blind area, above-mentioned no visual angle, the width of said hollow out lines are less than the spacing of hollow out lines, and parallel connection connects.

The utility model adopts the following ITO electrode that has the hollow out lines or goes up the ITO electrode; Because deformation can take place in the electric field line of hollow out line edge; The liquid crystal molecule at this place down can the different angles of rotating of being partial to of oriented both direction with electric field and friction acting in conjunction under powering state; Thereby all can have light to pass liquid crystal cell at each visual angle, thus eliminated the blind area, visual angle of liquid crystal display, improved the display effect of liquid crystal display.

Description of drawings

State when Fig. 1 does not power up for the conventional vertical aligned liquid crystal display;

State when Fig. 2 powers up for the conventional vertical aligned liquid crystal display;

State when Fig. 3 does not power up for the utility model;

State when Fig. 4 powers up for the utility model;

Fig. 5 is the A-A cut-open view;

Fig. 6 is the structural representation of no hollow out lines ITO electrode;

Fig. 7 is the structural representation that hollow out lines ITO electrode is arranged.

Each label is among the figure: 1, go up polaroid; 2 top glass substrate; 3, go up the ITO electrode; 4, go up the PI coating; 5, liquid crystal molecule; 6, following PI coating; 7, following ITO electrode; 8, lower glass substrate; 9, following polaroid; 10, hollow out lines.

Embodiment

Referring to Fig. 3～Fig. 7; Each of the utility model shows that the pairing ITO electrode 7 down of block (or going up ITO electrode 3) all is provided with a plurality of hollow out lines 10; Electrode between hollow out lines 10 and the adjacent hollow out lines 10 is all very thin, reaches micron order, much smaller than the resolution of vision.In order to guarantee display effect, the electrode part between the adjacent hollow out lines 10 is wideer than hollow out lines 10.Because the electrode between the adjacent hollow out lines 10 partly is connected in parallel voltage difference between each position of whole displaying block and traditional electrode basically identical.On perpendicular to the inclined to one side 1-3 of the direction of hollow out lines 10 °, vertical orientated PI coating is carried out the antiparallel friction, liquid crystal molecule 5 is had on the both direction on this line, all have unsettled sensing trend, and make it that bent tendency of pretwist arranged in the horizontal direction.When not powering up, the homotaxis of liquid crystal molecule 5 is in the passive vertical orientated state of tradition, and after powering up, the acting in conjunction of grappling because electric field and PI rub is at the hollow out position of displaying block with do not have the position of hollow out, the state of liquid crystal molecule 5 such as Fig. 4 and shown in Figure 5.

Need to prove that in Fig. 1～Fig. 5, all only having drawn one shows block, in Fig. 3～Fig. 5, has only two hollow out lines 10 on the following ITO electrode 7 of demonstration block, the ITO electrode among Fig. 7 then has a plurality of hollow out lines 10.

Can certainly two PI coatings not rubbed, and directly utilize the border of electric field to guarantee the vergence direction of liquid crystal molecule 5, but can make liquid crystal molecule 5 inclinations at some positions chaotic like this, reduce the brightness of display.

Claims

1. passive LCD that does not have the blind area, visual angle; Comprise top glass substrate (2), the lower glass substrate (8) that is parallel to each other in the formation and be clipped in the negative liquid crystal layer between the two; Lower surface in top glass substrate (2) is provided with ITO electrode (3) and last PI coating (4) successively, and upper surface is provided with polaroid (1); Upper surface in lower glass substrate (8) is provided with ITO electrode (7) and following PI coating (6) down successively; Lower surface is provided with down polaroid (9); It is characterized in that, be provided with a plurality of parallel hollow out lines (10) at the middle part of each the demonstration block that descends ITO electrode (7) or last ITO electrode (3).

2. according to the passive LCD of blind area, the said no visual angle of claim 1, it is characterized in that the width of said hollow out lines (10) is less than the spacing of hollow out lines (10), and parallel connection connects.