Anti-adsorption and anti-interference prism film

Abstract

The invention discloses an anti-adsorption and anti-interference prism film which comprises a base material layer and an upper prism layer arranged on the upper end face of the base material layer, the upper prism layer comprises a plurality of first light-transmitting prisms arranged in the Y direction of the base material layer, and the length direction of the first light-transmitting prisms is consistent with the X direction of the base material layer; wherein a plurality of de-interference grooves are formed in the direction of the edge top length side line of the light-transmitting prismoid. The prism film provided by the invention has a certain light diffusion effect, and is helpful for reducing the moire interference phenomenon and improving the visual angle; and when the prism film is mounted in a fitting manner, the problem of adsorption between the prism film and the back surface of the liquid crystal screen can be solved through the hollow structure of the de-interference groove.

Description

Technical Field

[0001] The invention relates to the technical field of prism film structures, and in particular to an anti-adsorption and deinterference type prism film. Background Art

[0002] Prism film is an important component of backlight modules such as televisions, car screens, and tablets. Its function is to concentrate light and increase brightness. Prism film is composed of a substrate layer and a prism layer. The prism layer of the prior art is a long strip of prisms arranged in sequence along the same direction, and the cross-section of the long strip of prism is an isosceles right triangle. Practical applications show that this prism film will produce interference during use due to the orderly prism structure.

[0003] In the prior art, such as the patent "Enhanced Prism Film" with publication number CN101825736B, the light-emitting surface of the enhanced prism film in this application is a discontinuous curved surface structure, and the entire light-emitting surface is composed of several micro-light-emitting structures, which is reflected in a random distribution on a macro scale, and can effectively avoid the light interference phenomenon of the emitted light; but there are the following defects in the actual production process: the three-dimensional surface composed of several arcs extending in the first direction and several triangles extending along the second direction is complex and difficult to produce, and the complexity of the process causes an increase in production costs, which does not conform to the future trend of simplification and compounding of prism films. Summary of the invention

[0004] The object of the present invention is to provide an anti-adsorption and de-interference type prism film, which is used to solve the problem of interference phenomenon occurring in the prism film structure during use in the prior art.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] An anti-adsorption deinterference type prism film, comprising a substrate layer and an upper prism layer arranged on the upper end surface of the substrate layer, wherein the upper prism layer comprises a plurality of light-transmitting prisms arranged along the Y direction of the substrate layer, and the length direction of the light-transmitting prisms is arranged in the same direction as the X direction of the substrate layer;

[0007] Wherein, a plurality of interference-resolving grooves are provided along the length edge direction of a prism top of the light-transmitting prism.

[0008] As a further solution of the present invention: when an upper prism layer is disposed on the upper end surface of the substrate layer, adjacent light-transmitting prisms are disposed in parallel in sequence, or adjacent light-transmitting prisms are disposed with a gap distance therebetween.

[0009] As a further solution of the present invention: the cross-section of the light-transmitting prism 1 is an isosceles right triangle, the width B2 of the light-transmitting prism 1 is 20-120 μm, and the height H2 is 20-70 μm; the width B1 of the interference resolution groove opened on the light-transmitting prism 1 is 5-15 μm, and the height H1 is 5-15 μm.

[0010] As a further solution of the present invention: when the light-transmitting prism body has the interference resolution grooves, the adjacent interference resolution grooves are arranged in parallel in sequence, or there is a gap distance between the adjacent interference resolution grooves.

[0011] As a further solution of the present invention: when a gap distance is set between adjacent interference resolution grooves, the gap distance L is 30-50 μm.

[0012] As a further solution of the present invention: when there is a gap distance between adjacent light-transmitting prisms one, light-transmitting prisms two are arranged between adjacent light-transmitting prisms one, and the length direction of light-transmitting prisms two is arranged in accordance with the X direction of the substrate layer, and the width direction is arranged in accordance with the Y direction of the substrate layer.

[0013] As a further solution of the present invention: the gap distance between adjacent light-transmitting prisms one is consistent with the width B3 of the light-transmitting prism two.

[0014] As a further solution of the present invention: the cross section of the light-transmitting prism body 2 is an isosceles right triangle, the width B3 of the light-transmitting prism body 2 is 20-60 μm, and the height H2 is 20-40 μm.

[0015] As a further solution of the present invention: the interference resolution groove is in the shape of a quadrangular pyramid groove.

[0016] As a further solution of the present invention: the underlying back coating on the lower end surface of the substrate layer is a wavy triangular prism, the length direction of the underlying back coating is set consistently with the Y direction of the substrate layer, the width is set consistently with the X direction of the substrate layer, the edge length edge line of the ridge top of the underlying back coating fluctuates in the shape of a sine wave or cosine wave curve, the fluctuation period T is 500-2000μm, and the amplitude A is 2-5μm.

[0017] Beneficial effects of the present invention:

[0018] (1) The prism film is formed by arranging an upper prism layer on the substrate layer. The upper prism layer structure is composed of a light-transmitting prism and a de-interference groove, which has a certain diffusion effect, helps to reduce the moiré interference phenomenon and improve the viewing angle;

[0019] (2) The interference reduction groove improves the anti-interference performance of the prism film while maintaining a high brightness and viewing angle. When the prism film is installed, the hollow structure of the interference reduction groove can eliminate the adsorption problem between the prism film and the back of the liquid crystal screen;

[0020] (3) The prism film is provided with an upper prism layer on the substrate layer. The upper prism layer structure is composed of a light-transmitting prism body 1, a de-interference groove and a light-transmitting prism body 2, which enhances the diffusion effect of light, helps to further reduce the moiré interference phenomenon and further improve the viewing angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention;

[0023] Figure 2 yes Figure 1 A schematic diagram of a structure in which interference-solving grooves are arranged at intervals on a light-transmitting prism;

[0024] Figure 3 It is a schematic diagram of the structure in which the light-transmitting prism body 1 and the light-transmitting prism body 2 of the present invention are arranged at intervals;

[0025] Figure 4 yes Figure 3 Schematic diagram of the structure of interference resolution grooves arranged at intervals on a light-transmitting prism.

[0026] In the figure: 10, substrate layer; 20, upper prism layer; 200, light-transmitting prism 1; 201, interference-resolving groove; 202, light-transmitting prism 2; 30, lower back coating layer. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention; in the description of the present invention, the meaning of "multiple" and "several" is at least two, for example two, three, etc., unless otherwise clearly and specifically defined.

[0029] See also Figures 1 to 4 As shown, the present invention is an anti-adsorption and de-interference type prism film, comprising a substrate layer 10 and an upper prism layer 20 arranged on the upper end surface of the substrate layer 10, the upper prism layer 20 comprises a plurality of light-transmitting prisms 200 arranged along the Y direction of the substrate layer 10, and the length direction of the light-transmitting prisms 200 is arranged in the same direction as the X direction of the substrate layer 10; wherein, a plurality of de-interference grooves 201 are opened along the length edge direction of the apex of the light-transmitting prisms 200.

[0030] During the use of the prism film of the present application, after the light reaches the upper prism layer 20, the incident light is refracted in the light-transmitting prism 200, so that most of the outgoing light is divergent relative to the incident light, and because the light-transmitting prism 200 has a de-interference groove 201, the de-interference groove 201 can be an arc groove or a tetrahedral groove, so that the incident light passes through the de-interference groove 201 and the outgoing light is scattered, so that the angle of the outgoing light is in a scattered state. Therefore, the de-interference groove 201 has a certain diffusion effect, which helps to reduce the moiré interference phenomenon and improve the viewing angle. In addition, the de-interference groove 201 maintains a high brightness and viewing angle while improving the interference reduction performance of the prism film. When the prism film is installed, the hollow structure of the de-interference groove 201 can eliminate the adsorption problem between the prism film and the back of the liquid crystal screen.

[0031] In this specific embodiment, when the upper prism layer 20 is arranged on the upper end surface of the substrate layer 10, adjacent light-transmitting prisms 200 are arranged in parallel in sequence, or there is a gap distance between adjacent light-transmitting prisms 200; when adjacent light-transmitting prisms 200 are arranged in parallel in sequence, it can be known from the principle of total reflection and refraction that the light-transmitting prisms 200 and the interference-solving grooves 201 shorten the path of the refracted light, which helps to improve the brightness and viewing angle of the prism film while reducing the interference performance; when there is a gap distance between adjacent light-transmitting prisms 200, the light-transmitting prisms 200 and the interference-solving grooves 201 lengthen the path of the refracted light, and while reducing the interference performance, the brightness of the prism film becomes relatively weaker and the viewing angle is relatively reduced.

[0032] In this specific embodiment, the cross-section of the transparent prism 200 is an isosceles right triangle, the width B2 of the transparent prism 200 is 20-120 μm, and the height H2 is 20-70 μm; the interference resolution groove 201 opened on the transparent prism 200 has a width B1 of 5-15 μm and a height H1 of 5-15 μm.

[0033] In this specific embodiment, when the interference resolution grooves 201 are opened on the transparent prism 200, the adjacent interference resolution grooves 201 are arranged in parallel in sequence, or there is a gap distance setting between the adjacent interference resolution grooves 201; when the adjacent interference resolution grooves 201 are arranged in parallel in sequence, it can be known from the principle of total reflection and refraction that the interference resolution grooves 201 will further shorten the path of the refracted light, and while reducing the interference performance, the brightness of the prism film becomes relatively stronger and the viewing angle is relatively expanded; when there is a gap distance setting between the adjacent interference resolution grooves 201, the interference resolution grooves 201 will further lengthen the path of the refracted light, and while reducing the interference performance, the brightness of the prism film becomes relatively weaker and the viewing angle is relatively reduced.

[0034] In this specific implementation, when a gap distance is set between adjacent interference reduction grooves 201 , the gap distance L is 30-50 μm.

[0035] In this specific embodiment, when a gap distance is set between adjacent light-transmitting prisms 1 200, a light-transmitting prism 2 202 is set between adjacent light-transmitting prisms 1 200, and the length direction of the light-transmitting prism 2 202 is set in the same direction as the substrate layer 10X, and the width direction is set in the same direction as the substrate layer 10Y; the gap distance between adjacent light-transmitting prisms 1 200 is consistent with the width B3 of the light-transmitting prism 2 202; when the upper prism layer 20 is set on the upper end surface of the substrate layer 10, after the light reaches the upper prism layer 20, the incident light is refracted in the light-transmitting prism 1 200 and the light-transmitting prism 2 202, so that most of the outgoing light is divergent relative to the incident light, and because the light-transmitting prism 1 200 has a de-interference groove 201, the de-interference groove 201 can be an arc groove or a quadrangular pyramid groove, and therefore, the incident light passes through the de-interference groove 201 and the outgoing light is scattered, so that the angle of the outgoing light is in a scattered state. Therefore, the first light-transmitting prism 200, the second light-transmitting prism 202 and the interference resolution groove 201 have a certain diffusion effect, which helps to further reduce the moiré interference phenomenon and further improve the viewing angle.

[0036] In this specific implementation, the cross section of the second light-transmitting prism 202 is an isosceles right triangle, the width B3 of the second light-transmitting prism 202 is 20-60 μm, and the height H2 is 20-40 μm.

[0037] In this specific implementation, the interference resolution groove 201 is in the shape of a quadrangular pyramid groove.

[0038] In this specific embodiment, the lower back coating layer 30 on the lower end surface of the substrate layer 10 is a wavy triangular prism. The length direction of the lower back coating layer 30 is set in the same direction as the substrate layer 10Y, and the width is set in the same direction as the substrate layer 10X. The edge line of the apex length of the lower back coating layer 30 fluctuates in the shape of a sine wave or a cosine wave curve, and the fluctuation period T is 500-2000μm, and the amplitude A is 2-5μm. The upper prism layer 20 is set on one side of the prism film, and the lower back coating layer 30 is set on the other side. The lower back coating layer 30 and the upper prism layer 20 are set in different directions, and the lower back coating layer 30 is set in a wavy shape, which can enhance the high brightness of the front side of the prism film, maintain the expanded viewing angle of the prism film, and effectively eliminate the mo i ré pattern caused by adsorption.

[0039] Example 1

[0040] like Figure 1 The provided anti-adsorption and deinterference type prism film includes a substrate layer 10 and an upper prism layer 20 arranged on the upper end surface of the substrate layer 10, and a lower back coating layer 30 arranged on the lower end surface of the substrate layer 10. The lower back coating layer 30 is a wavy triangular prism. The length direction of the lower back coating layer 30 is set in the same direction as the substrate layer 10Y, and the width is set in the same direction as the substrate layer 10X. The edge line of the apex length of the lower back coating layer 30 fluctuates in the shape of a sine wave or a cosine wave curve, the fluctuation period T is 500-2000μm, and the amplitude A is 2-5μm.

[0041] The upper prism layer 20 includes a plurality of light-transmitting prisms 200 arranged along the substrate layer 10Y direction. The length direction of the light-transmitting prisms 200 is arranged in the same direction as the substrate layer 10X direction. Adjacent light-transmitting prisms 200 are arranged in parallel in sequence. Among them, a plurality of de-interference grooves 201 are opened along the length edge direction of the apex of the light-transmitting prisms 200.

[0042] The cross section of the transparent prism 200 is an isosceles right triangle, the width B2 of the transparent prism 200 is 20-120 μm, and the height H2 is 20-70 μm; the interference resolution groove 201 opened on the transparent prism 200 has a width B1 of 5-15 μm and a height H1 of 5-15 μm.

[0043] Example 2

[0044] like Figure 2 The anti-adsorption interference resolution type prism film provided, embodiment 2 is different from embodiment 1 in that: a gap distance is set between adjacent interference resolution grooves 201; wherein the gap distance L between adjacent interference resolution grooves 201 is 30-50 μm.

[0045] Example 3

[0046] like Figure 3The anti-adsorption and deinterference type prism film provided, embodiment 3 is different from embodiment 1 in that: a gap distance is set between adjacent transparent prisms 200, a transparent prism 202 is set between adjacent transparent prisms 200, the length direction of the transparent prism 202 is set in the same direction as the substrate layer 10X, and the width direction is set in the same direction as the substrate layer 10Y; the gap distance between adjacent transparent prisms 200 is consistent with the width B3 of the transparent prism 202.

[0047] The cross section of the second light-transmitting prism 202 is an isosceles right triangle. The width B3 of the second light-transmitting prism 202 is 20-60 μm, and the height H2 is 20-40 μm.

[0048] Example 4

[0049] like Figure 4 The anti-adsorption interference resolution type prism film provided in Example 4 is different from Example 3 in that a gap distance is set between adjacent interference resolution grooves 201; wherein the gap distance L between adjacent interference resolution grooves 201 is 30-50 μm.

[0050] Comparative Example 1

[0051] The conventional prism film provided in comparative example 1 comprises a substrate layer 10 and an upper prism layer 20 arranged on the upper end surface of the substrate layer 10, wherein the upper prism layer 20 comprises a plurality of light-transmitting prisms 200 arranged along the substrate layer 10Y direction, wherein the length direction of the light-transmitting prisms 200 is arranged in the same direction as the substrate layer 10X direction, and adjacent light-transmitting prisms 200 are arranged in parallel in sequence; the cross-section of the light-transmitting prisms 200 is an isosceles right triangle, and the width B2 of the light-transmitting prisms 200 is 20-120 μm, and the height H2 is 20-70 μm.

[0052] The anti-adsorption and deinterference type prism film provided by the present invention and the product provided by the comparative example are tested by the following method.

[0053] Brightness and viewing angle: The prism film is installed in the backlight module, and the brightness and viewing angle (i.e. the angle of 1 / 2 of the center brightness) are measured using a BM-7 brightness meter purchased from Topcon, Japan. Viewing angle evaluation level: excellent > good > poor.

[0054] Interference resolution performance: Install the prism film into the backlight module and observe whether there are Newton rings and moiré effects on the display screen and whether the phenomenon is serious. Evaluation level: None > Slight > Obvious.

[0055] Anti-adsorption performance: Install the prism film into the backlight module, tear off the prism film on the display screen, and observe the adsorption performance. Evaluation level: excellent > poor.

[0056] The prism films prepared in Examples 1-4 and Comparative Example 1 were tested under the same module conditions in terms of brightness, viewing angle, interference resolution performance and anti-adsorption performance. The measurement results are shown in Table 1 below.

[0057] Table 1 Main performance test results of the prism films provided in the examples and comparative examples

[0058] project Moire effect Newton's Rings Brightness(%) Anti-adsorption performance Viewing angle Example 1 none none 85.3 excellent excellent Example 2 none none 87.8 excellent excellent Example 3 none none 84.5 excellent excellent Example 4 none none 85.9 excellent excellent Comparative Example 1 have obvious 100 Difference Difference

[0059] It can be seen that, by comparing and analyzing Examples 1-4 and Comparative Example 1, the brightness, viewing angle, interference resolution performance and anti-adsorption performance of the prism film are greatly improved.

[0060] The above is a detailed description of an embodiment of the present invention, but the content is only a preferred embodiment of the present invention and cannot be considered to limit the scope of implementation of the present invention. All equivalent changes and improvements made within the scope of the present invention should still fall within the scope of the patent coverage of the present invention.

Claims

1. An anti-adsorption interference prism film, characterized in that: It comprises a substrate layer (10) and an upper prism layer (20) arranged on the upper end surface of the substrate layer (10), wherein the upper prism layer (20) comprises a plurality of light-transmitting prisms (200) arranged along the Y direction of the substrate layer (10), and the length direction of the light-transmitting prisms (200) is arranged in the same direction as the X direction of the substrate layer (10); Wherein, a plurality of interference-resolving grooves (201) are provided along the length edge line direction of the apex of the light-transmitting prism (200).

2. The anti-adsorption deinterference type prism film according to claim 1, characterized in that: When an upper prism layer (20) is disposed on the upper end surface of the substrate layer (10), adjacent light-transmitting prisms (200) are arranged in parallel in sequence, or adjacent light-transmitting prisms (200) are arranged with a gap distance between them.

3. The anti-adsorption deinterference type prism film according to claim 2, characterized in that: The cross section of the light-transmitting prism 1 (200) is an isosceles right triangle, the width B2 of the light-transmitting prism 1 (200) is 20-120 μm, and the height H2 is 20-70 μm; the interference resolution groove (201) opened on the light-transmitting prism 1 (200) has a width B1 of 5-15 μm, and a height H1 of 5-15 μm.

4. The anti-adsorption deinterference type prism film according to claim 3, characterized in that: When the interference resolution grooves (201) are provided on the light-transmitting prism body (200), adjacent interference resolution grooves (201) are arranged in parallel in sequence, or adjacent interference resolution grooves (201) are arranged with a gap distance between them.

5. The anti-adsorption deinterference type prism film according to claim 4, characterized in that: When a gap distance is set between adjacent interference resolution grooves (201), the gap distance L is 30-50 μm.

6. The anti-adsorption deinterference type prism film according to claim 5, characterized in that: When a gap distance is set between adjacent light-transmitting prisms one (200), a light-transmitting prism two (202) is set between adjacent light-transmitting prisms one (200), and the length direction of the light-transmitting prism two (202) is set in accordance with the X direction of the substrate layer (10), and the width direction is set in accordance with the Y direction of the substrate layer (10).

7. The anti-adsorption deinterference type prism film according to claim 6, characterized in that: The gap distance between adjacent light-transmitting prisms 1 (200) is consistent with the width B3 of light-transmitting prism 2 (202).

8. The anti-adsorption deinterference type prism film according to claim 7, characterized in that: The cross section of the second light-transmitting prism (202) is an isosceles right triangle, the width B3 of the second light-transmitting prism (202) is 20-60 μm, and the height H2 is 20-40 μm.

9. The anti-adsorption deinterference type prism film according to claim 1, characterized in that: The interference resolution groove (201) is in the shape of a quadrangular pyramid groove.

10. The anti-adsorption deinterference type prism film according to claim 1, characterized in that: The lower back coating layer (30) on the lower end surface of the substrate layer (10) is a wavy triangular prism, the length direction of the lower back coating layer (30) is arranged in accordance with the Y direction of the substrate layer (10), and the width is arranged in accordance with the X direction of the substrate layer (10), and the edge line of the ridge top length of the lower back coating layer (30) fluctuates in the shape of a sine wave or a cosine wave curve, the fluctuation period T is 500-2000 μm, and the amplitude A is 2-5 μm.

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