阅读说明：本技术 一种高辉度光学反射片 (High-brightness optical reflector plate ) 是由 邓建东 于 2019-09-30 设计创作，主要内容包括：本发明公开一种高辉度光学反射片,包括：一PET基材,PET基材的两端面界定为入光侧和背光侧；一底涂层,涂布于PET基材的入光侧；一反射层,设于底涂层上,包括蒸镀或溅镀于底涂层上的厚度补偿层和溅镀于厚度补偿层上的银反射层；一减反射层,包括设于反射层上的第一减反射层、设于第一减反射层上的第二减反射层和涂布于第二减反射层上的保护层,所述第二减反射层的折射率大于所述第一减反射层与保护层的折射率；其中,PET基材厚度为40～90μm,底涂层厚度为0.5～3μm,厚度补偿层厚度为60～120nm,银反射层厚度为20～40nm,第一减反射层厚度为60～100nm,第二减反射层厚度为40～55nm,保护层厚度为1.5～5μm,所述保护层的折射率n不大于1.55。(the invention discloses a high-brightness optical reflector plate, comprising: the two end faces of the PET substrate are defined as a light incident side and a backlight side; the bottom coating is coated on the light incident side of the PET substrate; the reflecting layer is arranged on the bottom coating and comprises a thickness compensation layer evaporated or sputtered on the bottom coating and a silver reflecting layer sputtered on the thickness compensation layer; the antireflection layer comprises a first antireflection layer arranged on the reflecting layer, a second antireflection layer arranged on the first antireflection layer and a protective layer coated on the second antireflection layer, and the refractive index of the second antireflection layer is greater than that of the first antireflection layer and that of the protective layer; the thickness of the PET substrate is 40-90 mu m, the thickness of the bottom coating is 0.5-3 mu m, the thickness of the thickness compensation layer is 60-120 nm, the thickness of the silver reflecting layer is 20-40 nm, the thickness of the first antireflection layer is 60-100 nm, the thickness of the second antireflection layer is 40-55 nm, the thickness of the protective layer is 1.5-5 mu m, and the refractive index n of the protective layer is not more than 1.55.)

1. A high-luminance optical reflection sheet, comprising:

The two end faces of the PET substrate are defined as a light incident side and a backlight side;

the bottom coating is coated on the light incident side of the PET substrate;

the reflecting layer is arranged on the bottom coating and comprises a thickness compensation layer evaporated or sputtered on the bottom coating and a silver reflecting layer sputtered on the thickness compensation layer;

The antireflection layer comprises a first antireflection layer arranged on the reflecting layer, a second antireflection layer arranged on the first antireflection layer and a protective layer coated on the second antireflection layer, and the refractive index of the second antireflection layer is greater than that of the first antireflection layer and that of the protective layer; wherein the content of the first and second substances,

the thickness of the PET substrate is 40-90 mu m, the thickness of the bottom coating is 0.5-3 mu m, the thickness of the thickness compensation layer is 60-120 nm, the thickness of the silver reflecting layer is 20-40 nm, the thickness of the first antireflection layer is 60-100 nm, the thickness of the second antireflection layer is 40-55 nm, the thickness of the protective layer is 1.5-5 mu m, and the refractive index n of the protective layer is not more than 1.55.

2. The optical reflection sheet according to claim 1, wherein the thickness compensation layer is an aluminum metal layer deposited or sputtered on the primer layer, a titanium metal layer deposited or sputtered on the primer layer, or an aluminum-titanium alloy layer sputtered on the primer layer.

3. The optical reflection sheet according to claim 1, wherein the first antireflection layer is a SiO2 antireflection layer with a refractive index n of 1.45-1.50 or a MgF2 antireflection layer with a refractive index n of 1.35-1.40, and the first antireflection layer is sputtered on the silver reflection layer.

4. the high brightness optical reflection sheet according to claim 1, wherein the second antireflection layer is a TiO2 antireflection layer with a refractive index n of 2.2-2.4 or a Nb2O5 antireflection layer with a refractive index n of 2.2-2.35, and the second antireflection layer is sputtered on the first antireflection layer.

5. the high luminance optical reflection sheet according to any one of claims 1 to 4, wherein the protective layer is a polyester protective layer or a polyurethane protective layer.

6. The optical reflection sheet according to claim 5, wherein the primer layer is a UV adhesive primer layer or a thermosetting resin primer layer or a polyester primer layer or a polyurethane primer layer.

7. The optical reflection sheet according to claim 6, wherein the PET substrate has a thickness of 75 μm, the primer layer has a thickness of 2 μm, the compensation layer has a thickness of 60 to 90nm, the silver reflection layer has a thickness of 30nm, the first antireflection layer has a thickness of 90nm, the second antireflection layer has a thickness of 50nm, the protective layer has a thickness of 3 μm, and the protective layer has a refractive index n of 1.49.

Technical Field

the invention relates to the technical field of optical films, in particular to a high-brightness optical reflecting sheet.

background

the reflector plate reflects unscattered light sources and then enters the light conduction region, the reflection mode of the reflector plate is mirror reflection, and the utilization rate of light is improved through the mirror reflection.

Referring to fig. 1, a conventional PET substrate is coated with a film, which is a common reflective sheet. The reflecting sheet is formed by sputtering a metal silver reflecting material on a bottom coating of a PET substrate and then coating a protective coating. Firstly, because the protective coating is not in place, the metal silver coating can be affected by the temperature and the humidity of the environment to generate oxidation discoloration, thereby affecting the reflection efficiency of the reflector plate; secondly, the quality of the reflector plate is influenced by the thickness of the metal silver reflecting material, when the thickness of the metal silver reflecting layer is not enough, the metal silver cannot form a mirror surface on the PET substrate, so that incident light penetrates through the silver layer and is emitted from one side of the reflector plate, which is far away from the incident light, so that the light utilization rate is reduced, and when the thickness of the metal silver reflecting layer is thicker, the production cost of the reflector plate is increased due to the high price of the metal silver.

Fig. 2 shows a reflector structure (designated as GF-80) of a double silver structure, which has been mass-produced currently by the creator of the prior art, the reflector comprises a white PET bottom mold, an adhesive layer is arranged on the bottom mold, a reflective silver layer is arranged on the adhesive layer, and finally a PET top mold layer is arranged on the silver layer. Light enters from the PET top film layer of the reflector plate with the double-silver structure, and is reflected when passing through the PET top film layer, so that the incident light is reduced, and the light loss is serious.

Therefore, the present inventor designs a high brightness optical reflection sheet for realizing high penetration light of reflection sheet by combining with the requirement of production process.

disclosure of Invention

The technical problem to be solved by the present invention is to provide a high-brightness optical reflector plate, which can effectively avoid the oxidation of the silver layer, solve the problem of the existing reflector plate that the reflectivity is reduced due to the reduction of the thickness of the silver layer, and realize the high penetration light of the reflector plate by using the antireflection layer.

In order to solve the above technical problems, the present invention adopts the following technical solution, a high luminance optical reflection sheet, comprising:

The two end faces of the PET substrate are defined as a light incident side and a backlight side;

the bottom coating is coated on the light incident side of the PET substrate;

the reflecting layer is arranged on the bottom coating and comprises a thickness compensation layer evaporated or sputtered on the bottom coating and a silver reflecting layer sputtered on the thickness compensation layer;

The antireflection layer comprises a first antireflection layer arranged on the reflecting layer, a second antireflection layer arranged on the first antireflection layer and a protective layer coated on the second antireflection layer, and the refractive index of the second antireflection layer is greater than that of the first antireflection layer and that of the protective layer; wherein the content of the first and second substances,

The thickness of the PET substrate is 40-90 mu m, the thickness of the bottom coating is 0.5-3 mu m, the thickness of the thickness compensation layer is 60-120 nm, the thickness of the silver reflecting layer is 20-40 nm, the thickness of the first antireflection layer is 60-100 nm, the thickness of the second antireflection layer is 40-55 nm, the thickness of the protective layer is 1.5-5 mu m, and the refractive index n of the protective layer is not more than 1.55.

As a further elaboration of the above technical solution,

in the above technical solution, the thickness compensation layer is an aluminum metal layer deposited or sputtered on the undercoat layer, or a titanium metal layer deposited or sputtered on the undercoat layer, or an aluminum-titanium alloy layer sputtered on the undercoat layer.

In the above technical solution, the first antireflection layer is a SiO2 antireflection layer having a refractive index n of 1.45-1.50 or a MgF2 antireflection layer having a refractive index n of 1.35-1.40, and the first antireflection layer is sputtered on the silver reflective layer.

in the above technical solution, the second anti-reflection layer is a TiO2 anti-reflection layer with a refractive index n of 2.2 to 2.4 or a Nb2O5 anti-reflection layer with a refractive index n of 2.2 to 2.35, and the second anti-reflection layer is sputtered on the first anti-reflection layer.

In the above technical scheme, the protective layer is a polyester protective layer or a polyurethane protective layer.

In the above technical scheme, the primer layer is a UV glue primer layer or a thermosetting resin primer layer or a polyester primer layer or a polyurethane primer layer.

in the technical scheme, the thickness of the PET substrate is 75 micrometers, the thickness of the bottom coating is 2 micrometers, the thickness of the thickness compensation layer is 60-90 nm, the thickness of the silver reflecting layer is 30nm, the thickness of the first antireflection layer is 90nm, the thickness of the second antireflection layer is 50nm, the thickness of the protective layer is 3 micrometers, and the refractive index n of the protective layer is 1.49.

compared with the prior art, the reflector plate has the advantages that the reflector plate compensates the thickness of the silver layer and compensates light leakage by arranging the bottom coating on the PET substrate and arranging the thickness compensation layer consisting of active metal aluminum on the bottom coating; the reflection layer is provided with the reflection layer consisting of the first reflection reducing layer (low refractive index layer), the second reflection reducing layer (high refractive index) and the protection layer (low refractive index), and light rays are from low refractive index to high refractive index when entering light/exiting light, so that the entering light/exiting light is enhanced and the brightness is increased; moreover, a coating (protective layer) is arranged on the plating layer (second antireflection layer), and a low-refractive-index material is used, so that the reflectivity can be reduced, and the loss of reflected light in incident light is reduced; according to the invention, the first antireflection layer (SiO2) is arranged on the silver reflecting layer, so that the second antireflection layer (titanium white) is effectively isolated from the main reflecting layer (silver), the photochemical reaction is avoided, and the service life of the reflector plate is effectively ensured.

Drawings

FIG. 1 is a structural view of a conventional PET reflector sheet;

FIG. 2 is a schematic view of a conventional reflector plate with a double silver structure;

Fig. 3 is a schematic structural diagram of an embodiment of the present invention.

In the figure, 001, light incident side, 002, backlight side, 100, PET substrate, 200, primer layer, 300, reflective layer, 301, thickness compensation layer, 302, silver reflective layer, 400, antireflective layer, 401, first antireflective layer, 402, second antireflective layer, 403, protective layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

the embodiments described by referring to the drawings are exemplary and intended to be used for explaining the present application and are not to be construed as limiting the present application. In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and thus should not be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise. In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral connections; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate. In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.