WO2019117615A1

WO2019117615A1 - Optical isolation device

Info

Publication number: WO2019117615A1
Application number: PCT/KR2018/015754
Authority: WO
Inventors: 김병묵; 한상철; 박성민
Original assignee: 주식회사 엘지화학
Priority date: 2017-12-15
Filing date: 2018-12-12
Publication date: 2019-06-20

Abstract

The present application relates to an optical isolation device. Provided in the present application is an optical isolation device having excellent optical isolation, the device being simply formed at low cost. The optical isolation device, for example, can be applied to optical communication or the laser optical field, security, and the privacy protection field, and can also be applied to members for improving the brightness of a display or to the military product field and the like requiring concealment/hiding.

Description

Advertising Lip Device

Mutual citation with related applications

This application claims the benefit of priority based on Korean Patent Application No. 10-2017-0173335 dated December 15, 2017 and Korean Patent Application No. 10-2018-0158326 dated December 10, 2018, The entire contents of which are incorporated herein by reference.

Technical field

The present application is directed to an advertising lid device.

The advertising apparatus is a device in which the light transmittance in the forward direction is higher than the light transmittance in the reverse direction, and is also referred to as an optical diode. The advertisement apparatus can be used to prevent unnecessary reflection light in the field of optical communication or laser optical, and it can be applied to a building or automobile glass to be used for security or privacy protection. In addition, the advertisement lending apparatus can be applied to a variety of displays for improving brightness, or for military products requiring concealment and cover-up.

The present application relates to a photo-isolating element and an advertising lips device.

In one example of this application, the present application is directed to an advertising lid device. The invention of the present application will be described with reference to FIGS. 1 and 2. FIG.

As used herein, the term " advertising element " may mean a device configured such that the transmittance of light incident in the positive direction is relatively large compared to the transmittance of light incident in the opposite direction. The forward direction may mean the direction in which the light incident on the advertising lips element has the greatest transmittance and the backward direction may mean the direction in which the light incident on the advertising lips element has the lowest transmittance. The ratio (B / F) of the transmittance in the forward direction (F) to the transmittance in the reverse direction (B / F) may be 0.7 or less, 0.6 or less or 0.5 or less, and the lower limit is 0 or more, . In the present application, the light incidence surface may refer to a plane on which light incident in the normal direction of the advertising luminescent element is incident, and the light exiting surface may refer to a plane on which light incident in the normal direction of the advertising luminescent element emits.

In this specification, reference wavelengths relating to optical properties, such as the terms "transmittance", "retardation value", "reflectance" and "refractive index", can be determined according to the light to be isolated using the advertising lips element or the advertising lips. For example, when the element or apparatus of the present application is used to isolate light in the visible light region, the transmittance or the like may be, for example, any wavelength within the range of 400 nm to 700 nm or light of a wavelength of about 550 nm And when the light in the infrared region is intended to be isolated, the transmittance or the like may be, for example, a wavelength in the range of 700 nm to 1000 nm or a wavelength in a wavelength range of about 850 nm And in the case of isolating light in the ultraviolet ray region, the transmittance or the like may be a numerical value based on light having a wavelength within a range of 100 nm to 400 nm or a light with a wavelength of about 300 nm, for example .

The term " incident angle " in the present application may be an angle measured based on the normal of the light incidence surface, unless otherwise specified. At this time, the angle measured in the clockwise direction with respect to the normal is positive (+), and the angle measured in the counterclockwise direction is indicated with a negative (-). Unless otherwise specified, the term " exit angle " in the present application is an angle measured based on a normal line of a light emitting surface, and an angle measured in a clockwise direction on the basis of the normal line is positive The angle measured in the clockwise direction is indicated by a negative number (-).

In the present application, a value indicating an angle (degree, DEG) may be a value considering an error range. The error range may be, for example, ± 1 degree, ± 2 degrees, ± 3 degrees, ± 4 degrees, or ± 5 degrees, for example, vertical, parallel, incident angle and / It can be in range.

The present application relates to advertising lips elements. The advertisement element of the present application includes a light control film; A first optical path changing element; And a second optical path changing element.

In one example, each of the optical path changing elements and the light control film may have a light entrance surface and a light exit surface, and the light exit surface of the light control film and the light entrance surface of the first light path changing element may be opposed to each other.

In another example, the light-exiting surface of the first light-path changing element and the light-entering surface of the second light-path changing element can be opposed to each other.

In one example, the device comprises a light control film; A first optical path changing element; And a second optical path changing element in this order.

In another example, the light exit surface of the light control film and the light entrance surface of the first light path changing element may be in contact with each other.

In another example, the light exit surface of the first light path changing element and the light entering surface of the second light path changing element may be in contact with each other.

In the present specification, the term " optical path changing element " may mean an optical element capable of changing the path of incident light. For example, the optical path changing element may be an element capable of changing the path of light by refracting or diffracting incident light. The term " light control film " may mean a film that transmits only incident light incident at a predetermined angle.

The first optical path changing element may be an element capable of emitting light incident on the forward light incidence surface at an incident angle of the first angle to an outgoing angle of the second angle. In addition, the first optical path changing element may be an element capable of outputting light incident on the forward light emitting surface at an incident angle of the second angle to an output angle of the first angle. In the above, the first and second angles may be different from each other.

The second optical path changing element can emit the incident light incident on the forward light incidence surface at the incident angle of the second angle to the outgoing angle of the first angle and the incident light incident on the forward light emitting surface at the incident angle of the first angle to the second angle And / or an optical element which can emit outgoing light at a third angle. In one example, the second angle and the third angle may be the same or different in magnitude. In another example, the second angle and the third angle may be angles different from each other in sign. In another example, the third angle has an angle equal to the second angle, and may have a sign different from the second angle.

On the other hand, the light control film may be an optical element capable of transmitting incident light incident at a first angle of incidence on a forward light incidence surface or a forward light exiting surface, and blocking incidence light incident at an angle different from the first angle have. At this time, the blocking may mean absorption or reflection.

In one example, the first light-path changing element can emit incident light incident on the forward light incidence surface at an incident angle of the first angle only with the outgoing light of the second angle outgoing angle different from the first angle. Means that the first optical path changing element emits the incident light incident on the normal incidence surface at the first angle incidence angle only with the emergence angle of the second angle emergence angle means that the incident light I ₁ incident at the first angle incidence angle 20% or more, 30% or more, 40% or more, 50% or more, 60% or more, 70% or more of the ratio (I ₂ / I ₁ ) of the outgoing light (I ₂ ) Or more, 80% or more, 90% or more, or 95% or more, and most preferably 100%.

In an example of the present application, the second optical path changing element can output incident light incident on the forward light exiting surface at the first angular incidence angle only by the exiting light of the second angular exiting angle and the exiting light of the third angular exiting angle. Means that the second optical path changing element outputs the incident light incident on the forward light emitting surface at the first angle incidence angle with only the outgoing light of the second angle outgoing angle and the outgoing light of the third angle outgoing angle " Of the incident light (L ₁ ) incident at the incident angle of the first angle, the ratio of the outgoing light (L ₂ ) of the outgoing angle of the second angle and the outgoing light (L ₃ ) of the outgoing angle of the third angle (L ₂ + L ₃ ) / L ₁ ) may be 80% or more, 85% or more, 90% or more, or 95% or more, and ideally 100%.

In one example, the first angle may be an angle greater than -90 degrees and less than 90 degrees (-90 degrees to 90 degrees). For example, the first angle may be at least one of -80 degrees, -70 degrees, -60 degrees, -50 degrees, -40 degrees, -30 degrees, -20 degrees, -10 degrees, or - It can be more than 5 degrees. Or the first angle may be, for example, not more than 80 degrees, not more than 70 degrees, not more than 60 degrees, not more than 50 degrees, not more than 40 degrees, not more than 30 degrees, not more than 20 degrees, not more than 10 degrees, or not more than 5 degrees. In one example, the first angle may be substantially zero degrees.

In one example, the second angle may be greater than 5 degrees but less than 65 degrees (5 degrees to 65 degrees). The second angle may be greater than 5 degrees, greater than 10 degrees, greater than 15 degrees, greater than 20 degrees, greater than 25 degrees, greater than 30 degrees, greater than 35 degrees, or greater than 40 degrees in other examples. Or the second angle may be less than 65 degrees, less than 60 degrees, less than 58 degrees, less than 56 degrees, less than 54 degrees, less than 52 degrees, or less than 50 degrees. In one example, the second angle may be substantially about 45 degrees.

In another example, the second angle may be -65 degrees or more and -5 degrees or less (-65 degrees to -5 degrees). The second angle may be -5 degrees, -10 degrees, -15 degrees, -20 degrees, -25 degrees, -30 degrees, -35 degrees, or -40 degrees in other examples. Alternatively, the second angle may be greater than -65 degrees, greater than -60 degrees, greater than -58 degrees, greater than -56 degrees, greater than -54 degrees, greater than -52 degrees, or greater than -50 degrees. In one example, the second angle may be substantially -45 degrees.

In one example, the third angle has the same amount (magnitude) as the second angle, and may be an angle opposite the sign. For example, if the second angle is a clockwise value with respect to a normal to the forward light incidence surface or the forward light exiting surface, the third angle may be a value in a counterclockwise direction with respect to the normal of the forward light incidence surface or the forward light exiting surface. If the second angle is a counterclockwise direction with respect to the normal to the normal to the incoming or outgoing light surface, the third angle may be a clockwise value with respect to the normal to the normal incoming or outgoing light emitting surface.

The advertisement element of the present application implements a structure that satisfies the first to third angles to realize a device in which the transmittance of light incident on the light incidence surface is relatively higher than the transmittance of light incident on the light emission surface. In addition, it is possible to realize an optical element in which the transmittance of light incident in both directions is asymmetric.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 schematically shows an advertising strip element of the present application and a corresponding light path variation according to an example of the present application. Fig. Referring to FIG. 1, the advertisement element 1 of the present application may include a light control film 10, a first optical path change element 20, and a second optical path change element 30. The incident light 100 incident on the forward light incidence surface of the light control film 10 at the incident angle of the first angle is incident on the forward light incidence surface of the first light path changing element 20 after passing through the light control film 10 The first optical path changing element 20 can emit the incident light 100 incident on the forward light incidence surface at the incident angle of the first angle to the emerging light 200 of the exit angle of the second angle. The outgoing light 200 at the second angle is incident on the forward light incidence plane of the second light path changing element 30 and enters the forward light incidence plane of the second light path changing element 30 at an incident angle of the second angle, (200) can be emitted to the outgoing light (300) of the first angle outgoing angle.

On the other hand, in the advertisement lip element 1 of the present application, the incident light 400 at the first angle incident on the forward light emitting surface of the second optical path changing element 30 is incident on the outgoing light 500 at the second angle and / It can be emitted to the outgoing light 700 of the third angle. The outgoing light 500 at the second angle and the outgoing light 700 at the third angle are incident on the forward light emitting surface of the first optical path change element 20 at a second angle of incidence 500 and at a third angle of incidence Incident light 500 of the second angle is emitted as the outgoing light 600 of the first angle in the first optical path change element 20 while incident light 700 of the third angle is emitted as the outgoing light 600 of the first angle, And is emitted to the outgoing light 700 at an angle other than the angle. Outgoing light 600 emitted at a first angle out of the light emitted from the first optical path change element 20 is emitted through the light control film 10 but emitted at an angle other than the first angle 700 are blocked by the light control film 10 and can not be emitted in the reverse direction of the advertisinglip device 1. [ The advertisement element of the present application can implement a device having a different transmittance in both directions by adjusting the light path as described above.

In one example of the present application, the first optical path changing element and the second optical path changing element may be a prism film having a plurality of linear unit prism structures formed on one surface. As used herein, the term " prism " may refer to an optical element in the form of a polyhedron having flat surfaces on which light is incident, and may refer to a transparent optical element formed of a transparent solid material that refracts or reflects light. The shape of the prism is not particularly limited as long as the path of light incident on the light entrance surface or the light exit surface of the first light path changing element and the second light path changing element can be changed as in the optical path described above. For example, in the present application, a prism having a triangular cross section perpendicular to the ridgeline (direction) of the prism can be used. At this time, in each optical path changing element, a prism may be formed so that ridges of a plurality of prisms are arranged in parallel. This arrangement can be referred to as a linear prism arrangement.

In one example, the first optical path change element is configured to change the width (A) of incident light incident on the light incidence surface of each prism included in the first optical path changing element at an incident angle of the first angle, (B) 'of the outgoing light that is emitted at an angle of incidence of an angle. The wide width may mean the width of the incident light and / or outgoing light observed in the direction perpendicular to the incident light incident at the incident angle of the first angle and the outgoing angle of the second angle. For example, when the first optical path changing element includes a prism whose vertical cross section (orthogonal to the ridge line direction) is a diagonal right triangle, and one surface (base) of the orthogonal sides coincides with the light incidence surface, (A) of the incident light incident in the positive direction at the incident angle of the first angle and the width (B) of the emitted light incident at the incident angle of the second angle incident on the first optical path changing element at the incident angle of the first angle are different from each other . In this case, the incident light incident on the forward light incidence surface of the first light path changing element at the incident angle of the first angle can be emitted to the exit angle of the second angle while maintaining the light amount. On the other hand, The incident light incident on the light plane at the incident angle of the second angle can cause only a part of the incident light to be emitted at the outgoing angle of the first angle due to the wide difference. This makes it possible to increase the difference between the forward transmittance and the reverse transmittance.

(A) of the incident light incident on the light incidence surface of each prism of the first optical path change element at an incident angle of the first angle and the light incident width (B) of the outgoing light at the second incident angle of the respective prisms A / B) may be 0.0001 or more. The ratio A / B may be not less than 0.0001, not less than 0.0002, not less than 0.0003, not less than 0.0004, not less than 0.0005, not less than 0.0006, not less than 0.0007, not less than 0.0008, not less than 0.0009 or not less than 0.001, For example, it may be 1 or less. (A) of the incident light incident on the light incidence surface of each prism of the first optical path change element at an incident angle of the first angle and the light incident width (B) of the outgoing light at the second incident angle of the respective prisms A / B) satisfies the above range, the light incident in the normal direction can be emitted at a high transmittance while the transmittance of light incident in the opposite direction can be lowered.

In one example, the prism included in the advertising element of the present application may have a refractive index within a range of 1.2 to 1.8. The refractive index may refer to a value measured at a wavelength of 550 nm using a prism coupler manufactured by a metronization. The refractive index of the prism may be adjusted in an appropriate range according to the thickness of the first optical path changing element and / or the second optical path changing element. For example, the refractive index of the prism may be 1.20 or more, 1.25 or more, 1.30 or more, 1.35 or more, 1.40 or more, 1.45 or more, 1.50 or more, 1.55 or more or 1.60 or more, 1.80 or less, 1.75 or less, 1.70 Or less, or 1.65 or less. The first optical path changing element and / or the second optical path changing element can emit predetermined incident light at a desired angle with excellent efficiency within a range satisfying the refractive index.

In one example, the cross section of the unit prism structure of the first optical path changing element and the unit prism structure of the second optical path changing element may be different from each other. Here, the section means a vertical section orthogonal to the ridgeline (direction) of the prism. The optical path changing element may include a plurality of unit prisms, wherein the ridges of the unit prisms may be arranged in parallel.

For example, the cross section of the unit prism structure included in the first optical path change element may be a triangular prism shape, and the cross section of the unit prism structure included in the second optical path change element may be an isosceles triangle shape.

In the present application, a prism whose triangular cross section of the unit prism structure is referred to as a triangular prism. For example, it may mean a triangular prism having a vertical cross section orthogonal to a ridge of a prism, and more specifically, a triangular prism having a bottom cross and two hypotenuses . In the present application, the base may be a forward light incidence surface or a reverse light incidence surface, or may form a part of the forward light incidence surface or the reverse light incidence surface.

The term "prismatic triangular prism" in the present application may mean a triangular prism whose at least two hypotenuses differ from each other in the triangular shape of the vertical cross section orthogonal to the ridge of the prism. The term " isosceles triangle " in the present application may mean a triangle in which two hypotenuses have substantially the same length. The fact that the isosceles triangle has substantially the same length does not mean that the two hypotenuses actually have the same length, but also the error within a predetermined range, for example, when the difference of the lengths of the two hypotenuses is within 5% As used herein. At this time, the side excluding the hypotenuse used for describing the above-mentioned notched or isosceles triangular cross-section may be referred to as a base, and the base may be a forward light incidence surface or a reverse light incidence surface, or a forward light incidence surface or a reverse light incidence surface A part can be formed.

For example, the cross section of the unit prism structure included in the first optical path change element may be a right triangle. The right triangle shape may refer to a triangle having one base line and one hypotone perpendicular to each other. That the base and one hypotenuse are orthogonal may mean that the angle formed by the base and hypotenuses is about 90 degrees, and the angle may be an angle considering the above-mentioned error range.

In one example, the apex angle of the prism included in the first optical path change element may be in the range of 5 degrees to 120 degrees. The apex angle may be an angle formed by two hypotenuses of the diagonal prism. For example, the prism included in the first optical path changing element may have a cross section of a triangular prism that satisfies the apex angle. For example, within this range, the apex angle of the prism included in the first optical path change element may be at least 10 degrees, at least 15 degrees, at least 20 degrees, at least 25 degrees, at least 30 degrees, at least 35 degrees, at least 40 degrees, And the upper limit may be not more than 115 degrees, not more than 110 degrees, not more than 105 degrees, not more than 100 degrees, not more than 95 degrees, not more than 90 degrees, not more than 85 degrees, not more than 80 degrees Less than or equal to 75 degrees, less than or equal to 65 degrees, or less than or equal to 60 degrees. Alternatively, for example, the prism included in the first optical path changing element may have a section of a right triangle satisfying the apex angle. By using a prism film including a triangular prism having a predetermined cross sectional shape as the first optical path changing element, light incident at an incident angle of the first angle on the light incidence surface can be emitted to the exit angle of the second angle, Incident light incident at an incident angle of two angles can be emitted at a first angle.

In another example, the prism included in the second optical path changing element may be a prism whose apex angle is in a range of 5 degrees to 120 degrees. For example, the prism included in the second optical path changing element may have a triangular cross section satisfying the apex angle. For example, the prism included in the second optical path changing element may have an isosceles triangular cross section satisfying the apex angle. For example, the lower limit may be at least 10 degrees, at least 15 degrees, at least 20 degrees, at least 25 degrees, at least 30 degrees, at least 35 degrees, and at most 35 degrees. And the upper limit may be not more than 115 degrees, not more than 110 degrees, not more than 105 degrees, not more than 100 degrees, not more than 95 degrees, not more than 90 degrees, more preferably not more than 40 degrees, not less than 45 degrees, Less than or equal to 85 degrees, less than or equal to 80 degrees, less than or equal to 75 degrees, less than or equal to 65 degrees, or less than or equal to 60 degrees. The light incident on the light incidence surface of the prism at an incident angle of the second angle can be emitted to an exit angle of the first angle when the apex angle of the triangular prism or the isosceles triangle prism satisfies the above range, The incident light incident on the light surface at the incident angle of the first angle can be emitted as the outgoing light of the second angle or the third angle. When the incident light incident on the light emitting surface of the prism at a first angle is emitted as the outgoing light of the third angle, the outgoing light of the third angle may be blocked by a light control film described later. Thus, the light incident on the light emitting surface of the advertising luminescent element can be prevented from being emitted to the incident surface, and the reverse transmissivity can be lowered.

In one example, when a plurality of prism unit structures are included in the light path change element, the prism unit structures may have a structure connected to each other.

In one example, the light path changing element may include a plurality of unit prism structures having the same size and shape.

In one example, the light control film included in the advertising lips element of the present application may be an absorbent louver film. The absorbing louver film may be a louver film that transmits only incident light incident at a predetermined angle and absorbs incident light incident at other angles. By using the absorption type louver film as the light control film, it is possible to transmit only light at a predetermined angle, and through this, the transmittance of light incident in the opposite direction can be lowered.

The absorption type louver film applied to the light control film may be formed in a direction in which a plurality of louvers are parallel to the first angle. The fact that the louver is formed in a direction parallel to the first angle means that it is formed so as to be capable of transmitting light incident at the first angle. The direction parallel to the first angle may mean a direction including the above-described error range. The light guide plate according to any one of claims 1 to 3, wherein when the absorbing louver film is formed in a direction parallel to the first angle, light having a first angle emitted to the light incoming surface of the first optical path change element can be transmitted, It is possible to block the light.

The method of manufacturing the louver film applied to the present application is not particularly limited. For example, the louver film may include a light transmitting portion and a light absorbing portion. The light transmitting portion may be made of a polymer having a high light transmittance. As such a polymer, a thermoplastic resin, a thermosetting resin, a resin that can be cured by actinic rays such as UV light, or the like may be used. Examples of such resins include cellulose resins such as cellulose acetate butyrate and triacetyl cellulose, polyolefin resins such as polyethylene and polypropylene, polyester resins such as polyethylene terephthalate, polystyrene, polyurethane, Polyvinyl chloride, acrylic resin, polycarbonate resin and the like. The light absorbing portion may be formed by attaching a film formed of a material that absorbs light or by vapor-depositing a material that absorbs light to the light transmitting portion. Examples of such materials include (1) pigments or dyes of dark colors such as black or gray pigments or dyes such as carbon black, (2) pigments or dyes of aluminum (Al), silver (Ag), copper (Cu) , A metal such as nickel (Ni), palladium (Pd), platinum (Pt) and chromium (Cr), an oxide of the above metal and (4) a black pigment or dye such as carbon black Polymers and the like.

In one example, the thickness of the light control film included in the advertising lips element of the present application may be in the range of 1 占 퐉 to 400 占 퐉. The thickness of the light control film may be not less than 1 탆, not less than 2 탆, not less than 3 탆, not less than 4 탆, not less than 5 탆, not less than 6 탆, not less than 7 탆, or not less than 8 탆, Mu m or less, 370 mu m or less, 360 mu m or less, or 350 mu m or less, but is not limited thereto.

In another example, the thickness of the first optical path changing element and / or the second optical path changing element may be in the range of 5 탆 to 500 탆. The thickness of the first optical path change element and / or the second optical path change element may be 5 탆 or more, 6 탆 or more, 7 탆 or 8 탆 or more, 500 탆 or less, 490 탆 or less, 480 탆 or less, , Not more than 460 mu m, not more than 450 mu m, not more than 440 mu m, not more than 430 mu m, not more than 420 mu m, not more than 410 mu m, or not more than 400 mu m. For example, the optical path changing element may include a triangular prism whose distance from the base to the vertex can satisfy the thickness range. Alternatively, the optical path changing element may have a structure including the prism described above in a film satisfying the thickness range.

In another example of the present application, the advertising luminescent element comprises a light control film; A first prism film; And a second prism film sequentially.

The first prism film and the second prism film may be a film in which one or more unit prism structures are linearly formed on one surface of each of the first and second prism films. The unit prism structure is a prism structure having the above-described cross-sectional shape, and has a directional ridge line. The plurality of prism unit structures may be arranged such that the ridges of each structure are parallel to each other to form a prism film.

In one example, each cross section of the unit prism structure may have a triangular shape as described above, and the base portions of the triangular shape may be connected to each other. In this case, the portion corresponding to the base of the triangular cross-section of each unit prism structure can form an incoming or outgoing surface of the prism film, or a part thereof

In one example, the first and / or second prism films may include a plurality of unit prism structures having the same structure. For example, the first prismatic film may be a repeating prismatic structure having one of the structures shown in Fig.

The unit prism structures of the first and second prism films may be formed to have apex angle on the forward light emitting surfaces of the respective prism films. For example, the cross section of the unit prism structure of the first prism film is a triangular prismatic triangle, the cross section of the unit prism structure of the second light path changing element is an isosceles triangle, and the vertex angle is set to be the forward light exit surface, As shown in FIG.

The detailed description of the prism film and the light control film is the same as that described above, and thus will be omitted.

The present application also relates to an advertising luminaire. The advertisement apparatus of the present application may include at least one or more of the above-described advertisement element. The term " advertising lyric device " is a device that includes an advertising ling element and has an advertising ling function. Therefore, the advertising luminaire is also configured such that the transmittance of the light incident in the positive direction is relatively larger than the transmittance of the light incident in the opposite direction, and the range of isolation, forward transmittance, and reverse transmittance, Can be applied equally.

The advertising lending device may include one or two or more of the above-mentioned advertisement lending elements. In the case where two or more advertisement rip elements are included, each of the advertisement rip elements may be arranged so that light transmitted through one of the advertisement rip elements along the normal direction can enter the first optical path changing element side of the other advertisement rip element . In this manner, a plurality of advertising lent elements can be arranged in a forward direction in series. By applying a plurality of advertisement elements as described above, the advertising lid can be further improved. Theoretically, the light transmitted through the plurality of advertising luminescent elements in the normal direction continues to transmit without loss, but in the case of light transmitted in the opposite direction, the light is continuously reduced at an exponent of 1/2. Thus, by controlling the number of advertisement elements, the advertising lie degree can be maximized.

In one example, the ratio of the transmittance of light incident in the normal direction and the transmittance of the light incident in the opposite direction in the advertisement apparatus may be about 3 dB or more, depending on the isolation ratio (IR) according to Equation 1 below .

[Equation 1]

IR = 10 x n log (F / B)

In Equation 1, IR is the isolation, n is the number of the advertisement elements to be described later included in the advertisement apparatus, F is the transmittance of light incident on the advertisement apparatus in the positive direction, and B is the transmittance of light incident on the advertisement apparatus in the reverse direction It is the transmittance of light.

At least about 55%, at least about 60%, at least about 65%, at least about 70%, at least about 75%, at least about 80%, at least about 85% of the light transmitted through the forward direction of the advertising luminaire , About 90% or more, or about 95% or more. The upper limit of the forward transmittance may be about 100%. Also, the transmittance of the light incident in the reverse direction of the advertising laminator is less than about 50%, less than about 50%, less than about 45%, less than about 40%, less than about 35%, less than about 30% , Up to about 20%, up to about 15%, up to about 10%, up to about 5% or up to about 1%. The lower limit of the reverse transmittance may be about 0%.

Such advertising equipment may include additional configurations. For example, the advertisement apparatus may further include a light path controller, such as a prism or a reflector, which can additionally control the light path, if necessary, in addition to being included in the above-described advertisement element.

In addition, the advertising luminaire may include additional optical elements other than the above, if desired. For example, the advertising luminaire may include an optical element, such as a louver plate.

Such a louver plate or the like may exist, for example, on the side on which the light advancing in the forward direction is finally emitted, for example, before and / or behind the above-mentioned second optical path change element.

In the present application, there is provided an advertising lenticular element and an advertising lenticular element having a high transmissivity in a normal direction and an excellent advertising lenticity. Such advertisement elements or devices can be applied not only to the fields of optical communication, laser optics, security and privacy, but also to military products which require a member for enhancing luminance of a display, concealment, cover, and the like.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram showing a structure of an advertising lid device according to the present application. Fig.

Fig. 2 schematically shows a cross-section of an usable prism in relation to an optical path changing element according to an example of the present application. The dotted line portion is the base of the triangular cross section, and theta is the vertex angle shown for explaining the shape of the cross section.

1: Creative Element

10: light control film

20: First optical path changing element

30: Second optical path changing element

100: incident light of a first angle incident in the positive direction

200: Outgoing light of a second angle emitted in the normal direction

300: Outgoing light of a first angle emitted in the normal direction

400: incident light of a first angle incident in the opposite direction

500: Outgoing light of a second angle emitted in a reverse direction

600: Outgoing light of a first angle emitted in a reverse direction

700: incident light incident in the opposite direction and blocked by the light control film

Hereinafter, the present application will be described in detail by way of examples. However, the scope of the present application is not limited by the scope given below.

실시예 1Example 1

Using the optical modeling software ASAP Pro 2014 V1 SP1 from Breault Research Organization, Inc., and the ray tracing simulation software Synopsys light tools, the advertiser element was modeled to have the same optical path as in FIG. 1, and the transmittance in both directions, F B, and the degree of isolation. The modeled advertisement element 1 has a structure in which the light control film 10, the first optical path change element 20, and the second optical path change element 30 are sequentially laminated. Specifically, the light control film 10 has the absorbing layer louvers formed horizontally in the light propagation direction inside the resin having the refractive index of 1.5; The first optical path changing element 20 is an element having a right triangular prism array having a refractive index of 1.52 and a vertex angle of 52 degrees formed on the forward light-emitting surface side; The second optical path changing element 30 is composed of an isosceles triangular prism array having a refractive index of 1.52 and a vertex angle of 59 degrees formed on the forward light emitting surface side. The thickness of the light control film 10, the first optical path change element 20 and the second optical path change element 30 is set to 200 탆 and the light control film 10, The second optical path changing element 20, and the second optical path changing element 30 were fabricated in a film form through lamination, and the transmittance in both directions, F and B, and isolation were respectively calculated.

As a result, the forward transmittance (F) was 100%, and the reverse transmittance (B) confirmed by transmitting light in the opposite direction was 50%. The isolation (IR) according to Equation 1 was about 3.01.

실시예 2Example 2

A prism array having a refractive index of 1.62 as the first optical path changing element 20 and a vertex angle of 48 degrees formed on the forward light emitting surface side is used; A laminated structure having the same structure as that of Embodiment 1 was modeled, except that the isotropic triangular array having a refractive index of 1.62 and a vertex angle of 57 degrees formed on the forward light-directing side was used as the second optical path changing element 30. [

The resultant forward transmittance (F) was 100%, and the reverse transmittance (B) was 1% when the light was transmitted in the opposite direction. The isolation (IR) according to Equation 1 was about 20.

It can be seen from the simulation results of Examples 1 and 2 that the forward and reverse transmittances of the advertisement lips of the present application show a large difference, and it is confirmed that the advertisement lid elements having excellent optical isolation can be formed .

Claims

Light control film; First and second optical path changing elements in sequence,

Wherein the first optical path change element emits incident light incident on the forward light incidence surface at an incident angle of the first angle to an exit angle of the second angle different from the first angle, To emit light at the first angle,

The second light-path changing element emits incident light incident on the forward light incidence surface at an incidence angle of the second angle to an incidence angle of the first angle and incident light incident at the incidence angle of the first angle to the forward light- And emitted as three-angle outgoing light,

Wherein the light control film transmits incident light incident on the forward light incidence surface or the forward light extinguishing surface at an incident angle of the first angle and blocks light incident at an angle different from the first angle.
The advertising luminescent element according to claim 1, wherein the first light-path changing element emits incident light incident on the forward light incidence surface at an incident angle of the first angle only with emerging light of a second angle emerging angle different from the first angle.
And a second light path changing element for emitting light incident on the forward light emitting surface at an incident angle of the first angle with only the emitted light of the second angle outgoing angle and emitted light of the third angle outgoing angle, device.
The method of claim 1, wherein the first angle is an angle in the range of greater than -90 degrees to less than 90 degrees,

The second angle is an angle within a range of -65 degrees to -5 degrees or 5 degrees to 65 degrees,

Wherein the third angle is an angle with the same magnitude as the second angle and is an opposite sign.
The advertising luminescent device according to claim 1, wherein the first optical path changing element and the second optical path changing element are prism films having a plurality of linear unit prism structures formed on one surface thereof.
The advertising luminescent element of claim 5, wherein the prism film has a refractive index in the range of 1.35 to 1.70 based on light at a wavelength of 550 nm.
6. The advertising luminescent element according to claim 5, wherein the cross section of the unit prism structure of the first optical path change element is a triangulated shape and the cross section of the unit prism structure of the second light path changing element is an isosceles triangle shape.
The advertising luminescent element according to claim 7, wherein the cross section of the unit prism structure of the first optical path change element is in the form of a right triangle.
The advertising luminescent element of claim 1, wherein the light control film is an absorbent louver film.
Light control film; A first prism film; And a second prism film sequentially,

Wherein the first prism film and the second prism film each include at least one unit prism structure on one surface thereof,

Wherein the unit prism structure has a triangular cross-sectional shape having a vertex angle on the side of the forward light-

Wherein a cross section of the unit prism structure of the first prism film is a triangular prism shape,

Wherein the cross section of the unit prism structure of the second prism film is an isosceles triangle shape.
11. The advertising lid of claim 10, wherein the trapezoidal triangle is in the form of a right triangle.
11. The advertising lid of claim 10, wherein the light control film is an absorbent louver film.
An advertising lag apparatus comprising at least two advertising lib elements according to claim 1, wherein the advertising lib elements are arranged in series.