WO1994010621A1

WO1994010621A1 - A light-adjustment screen by use of the polarizing strips

Info

Publication number: WO1994010621A1
Application number: PCT/KR1993/000093
Authority: WO
Inventors: Joo Sang Lim
Original assignee: Joo Sang Lim
Priority date: 1992-10-24
Filing date: 1993-10-23
Publication date: 1994-05-11
Also published as: AU5377394A

Abstract

The present invention relates to a light-adjustment screen of two plates made up of sections of strips polarizing light vertically and sections of strips polarizing light horizontally, the two different types of sections being laid out alternatingly with a certain width or in other desired patterns on each plate, and the two plates set face to face, close to each other, so as to partially overlap each other, with a view to adjusting the amount of light shining in by means of adjusting the parts of each plate where the vertically polarizing and horizontally polarizing sections of each can overlap each other.

Description

A LIGHT-ADJϋSIMEffl: SCREEN BY USE OF IHE POLARIZING STRIPS

Technical Field

The present invention relates to a screen for adjusting, by the use of *> polarizing strips, the amount of light penetrating or shining in, and in more detail, to a light-adjustment screen comprising two light-polarizing plates of glass, which are each mounted with a number of narrow film strips polarizing light vertically and other film strips polarizing light horizontally, arranged alternatingly at a certain interval or in a predetermined pattern, said two plates being placed closely face to face with, and yet one movable in parallel to the other, so that it can be moved at will in certain desired relation with the other to adjust the amount of light to shine in.

Background of Art

In order to adjust the amount of light shining into the inner space of a room or of a car such devices as curtains, blinders, or screens are in use. But these are apt to fade or change color as time passes. They are not stout or strong enough; their durability is limited. Besides, they usually occupy much space. They are, by themselves, never adequate to admit patterns, characters, figures, or other pictorial features as much as is desired.

Summary of Invention

An objective of the present invention is to provide a light-adjustment screen which requires a smaller space, is easier to operate, shows various pictorial features, and has greater durability than most conventional devices.

The light-adjustment screen using the light-polarizing strips of the present invention is made to accomplish the above. This invention is characterized by its structure, in which two plates of glass are mounted with polarizing sections of strips for either vertical or horizontal polarization

. of light, each arranged alternatingly at a set interval or in a predetermined distribution, the two plates being set either in an overlapping fashion or closely face to face with each other in a way that the sections for vertical or horizontal polarization of both which overlap can be arranged in such

SUBSTITUTE SHEET mutual relationships to each other that the amount of the light which shine in is adjusted at will.

Brief Description of Drawings

Fig. 1 is a perspective view of a light-adjustment screen of the present invention.

Figs. 2 a, b, c and Figs. 3 a, b, c show different shapes and patterns of the polarizing sections, laid out differently, of the screen of the present invention.

Detailed Description of Embodiments of Present Invention

Various embodiments of a light-adjustment screen according to the present invention will now be described with reference to the accompaning drawings.

As shown in Figs. 1 and 2, the light-polarizing plates A and B respectively, formed of sections of vertically polarizing strips 11 and of horizontally polarizing strips 12 arranged alternatingly with a certain width, or a designed pattern, and one plate of said plates is fixed in, or close to, a window (drawing omitted) face to face, while the other plate B of said plates (moveable) is set face to face with said fixed plate A, close to it and movable in parallel to said fixed plate A.

In the present invention, as shown above, when the movable plate B is moved so that the vertically polarizing sections 11 of said fixed plate overlap with the horizontally polarizing sections 12 of the movable plate B in their entirety no light can shine in through these two plates A, B, while all light can freely shine in through plates A, B if the movable plate B is so moved that the strips polarizing light in the same direction on both plates A, B overlap each other. Therefore, the amount of light shining in varies according as the size of the areas of the sections 11, on both plates, polarizing light in the same direction which overlap each other alters, and for this reason it becomes possible to adjust the amount of light which shines through by an appropriate operation of the movable plate B. Moreover, when the sections 11, polarizing light in the same direction, on the two plates A, B [e. g. the vertically polarizing sections 11 of the fixed plate A and the

SUBSTITUTE SHEET vertically polarizing strips 11 of the movable plate B] face each other, a moving of the movable plate B only for the width of a section will bring the sections polarizing light in different directions on both plates A, B to face each other to allow no light to penetrate. It follows that a decrease in the number of sections, and each with the width decreased, on each plate will enable transmitting and shutting off of light by moving of the movable plate B only for a very short distance to result in an easier adjustment of light than otherwise.

Figs. 2 a, b and c show the fixed polarizing plates of various other embodiments, while Figs. 3 a, b and c show the movable polarizing plates corresponding each to the fixed polarizing plates of Figs. 2 a, b and c ; in both Fig. 2 a and the corresponding Fig. 3 a, the vertically polarizing sections 11 and horizontally polarizing sections 12 are laid out alternatingly in a fashion of slanting lines, while in both Fig. 2 b and the corresponding Fig. 3 b said vertically polarizing sections 11 and the horizontally polarizing sections 12 are laid out in a fashion of checkerboard ; while Fig. 2 c and the corresponding Fig. 3 c show a layout of the vertically polarizing sections 11, the horizontally polarizing sections 12 each of a certain width in a fashion of belts with round figures 13, of sections polarizing in different directions between the inner and of outer parts of same round figures, all evenly distributed, overlapping some of the vertically polarizing sections and the horizontally polarizing sections of each plate of the screen.

Accordingly, as has been said above, by different combinations of at least two plates, two each, a screen with plates of slanting line sections, sections, or of sections of interesting pictorial figures is obtained.

Aside from these, it is possible for the present invention to produce screens carrying interesting figures, characters, numericals, etc., as is desired. For example, by devising various layouts of the vertically polarizing and horizontally polarizing sections alternating each other it is possible to make up a screen where desired pictorial figures or numericals can be made to appear or disappear at will by an operation of the movable plate.

As has been described above, the light-adjustment screen of the present invention has great advantages in that it can be used as a wonderful curtain,

SUBSTITUTESHEET blinder, or a screen to shut out or admit light, whole or in part, because i the screen of two plates made of the vertically polarizing sections, the horizontaly polarizing sections, and sections of pictorial figures, one of which two plates fixed and the other left moveable, if the parts where the sections polarizing light in the same direction overlap they will let light penetrate and if the parts where the sections polarizing light in different directions overlap they shut light out; that the durablility of this screen is semi-permanent because the polarizing sections are themselves of stout construction; that it can be set in a window because it does not necessarily occupy very much space; and that^, it can be used as part of an advertising construction; that it can be set in a window because it does not necessarily occupy very much space; and that^, it can be used as part of an advertising device or interior decor because interesting pictorial figures, letters, or other designs can appear or disappear according as the moveable plate is operated differently.

SUBSTITUTESHEET

Claims

CLAIM

What I claim is ;

A light-adjustment screen comprising at least one fixed plate A and at least one moveable plate B, each made of sections 11 of vertically light-polarizing strips and sections 12 of horizontally light-polarizing strips arranged alternatingly with a certain width or in a desired pattern, said moveable plate B being set to overlap partially with said fixed plate A, or set otherwise, set so as to move in parallel with said fixed plate A to adjust the amount of light shining in at will by adjusting the parts where the vertically polarizing sections of a plate A and the horizontrally polarizing sections of the other plate B overlap with each other.

SUBSTITUTE SHEET