TWI834244B - Optical films and light source modules - Google Patents

Abstract

The invention provides an optical film, which includes a light-transmitting base material, a light point intensity modulation layer, a plurality of functional optical layers and at least one adhesive layer; wherein the light point intensity modulation layer includes at least one light point intensity modulation unit, and each light point intensity modulation unit The point intensity modulation unit includes ink or a first three-dimensional structure, and each functional optical layer includes a second three-dimensional structure, and the second three-dimensional structures of each functional optical layer are the same or different from each other. Therefore, the present invention can effectively achieve optical Uniform processing results. The present invention also provides a light source module that can effectively eliminate the hot spot phenomenon of point light sources under the condition that the light propagation distance is extremely limited.

Description

Optical films and light source modules

The present invention relates to an optical film, especially an array light source module used for LED backlight.

Image quality is an important basis for consumers to evaluate displays, so the trend of high-standard display images and detailed partition control has arisen accordingly. Light-emitting diode displays (LED displays) have the advantages of high brightness, bright colors and long life, and are gradually favored by consumers. In addition, compared with previous displays that used cold cathode fluorescent lamps as the light source, using light-emitting diodes as the light source can effectively reduce the size and thickness of the display, and is more in line with consumer expectations, so its market demand is growing day by day.

However, as light-emitting diode displays continue to pursue thinning and lightness, the light propagation distance will continue to be reduced, which will greatly increase the difficulty of uniform light processing. Therefore, there will be an urgent need for new optical elements that can effectively achieve uniform light processing under the condition that the light propagation distance is extremely limited.

In order to meet the above needs, the present invention provides an optical film, which includes a light-transmissive base material with opposite light-incoming surfaces and light-emitting surfaces; a light point intensity modulation layer connected to the light-emitting surface of the light-transmitting base material; and a plurality of functional optics. layers, each connected to the light-transmitting base material, and the plurality of functional optical layers include a light-increasing functional optical layer adjacent to the light-incident surface of the light-transmitting base material; and a light-emitting functional optical layer adjacent to the light-transmitting base material The light-emitting surface of the substrate; at least one adhesive layer, including a light-emitting adhesive layer, is located between the light-emitting functional optical layer and the light-emitting surface of the light-transmitting substrate; wherein the light point intensity modulation layer includes at least one light point intensity modulation layer unit, and each of the light point intensity modulation units includes ink or a first three-dimensional structure, and each of the functional optical layers includes a second three-dimensional structure, and the second three-dimensional structures of each of the functional optical layers are the same or different from each other.

The optical film of the present invention includes the light point intensity modulation layer and the plurality of functional optical layers, because the intensity modulation unit of the light point intensity modulation layer includes ink or a first three-dimensional structure, and each of the functional optical layers includes a second three-dimensional structure. The structure can refract, scatter, reflect, shield, excite, change the wavelength or color of the incident light from the light source, and exhibit light excitability, light diffusion, light reflectivity and light conversion. In addition to effectively eliminating In addition to the hot spot phenomenon of point light sources, it can also improve light uniformity and achieve the effect of adjusting the light pattern. In addition, the second three-dimensional structures of the plurality of functional optical layers of the optical film of the present invention are the same or different from each other, and combined with various transformation combinations of the ink or the first three-dimensional structure of each intensity modulation unit, the optical functional performance can be improved. flexibility, and enhanced design adaptability to meet the needs of different applications. Finally, the present invention integrates the light spot intensity modulation layer, the plurality of functional optical layers and the at least one adhesive layer into a single component. In addition to being able to present multiple optical properties in one piece, the mechanical strength and mechanical strength of the optical film of the present invention can also be improved. Weather resistance.

According to the present invention, "adjacent" is used to define the relative positions of different components. For example, the light-incident functional optical layer is adjacent to the light-incident surface of the light-transmissive substrate, indicating the position of the light-incident functional optical layer. A position close to the light incident surface of the light-transmissive substrate. In addition, "adjacent" can also be replaced by "adjoining", "adjacent" or "contiguous". Therefore, for example, "the light-incident functional optical layer is adjacent to the light-incident surface of the light-transmissive base material" can also mean that the light-incident functional optical layer is directly connected or indirectly connected to the light-incident surface of the light-transmissive base material. noodle. Finally, two different components that are adjacent to each other can also be spaced apart from each other without being connected to each other.

In an embodiment, the thickness of the light-transmitting substrate is 120 microns to 130 microns, the thickness of the light spot intensity modulation layer is 6 microns to 15 microns, and the thickness of each functional optical layer is 27 microns to 45 microns. , and/or the thickness of each bonding layer is 10 microns to 14 microns. Preferably, the thickness of the light-transmitting substrate is 125 microns, the thickness of the light spot intensity modulation layer is 10 microns, the thickness of each functional optical layer is 30 microns, and/or the thickness of each adhesive layer is 12 microns. Micron.

In an embodiment, the haze of the light-transmissive substrate is 0.1% to 99%.

The above haze refers to the ratio of the scattered light flux that penetrates the sample and deviates from the direction of the incident light to the transmitted light flux, and is expressed as a percentage. In addition, for the part of the scattered light flux that deviates from the direction of the incident light, usually only the scattered light flux that deviates from the direction of the incident light by more than 2.5 degrees is taken into account.

In an implementation, the light transmittance of each light point intensity modulation unit is 20% to 60%.

The above-mentioned light transmittance refers to the ratio of the light flux penetrating the sample to the light flux incident on the sample, and is expressed as a percentage.

In one implementation, the haze or light transmittance of each functional optical layer is 1% to 99%. Preferably, the haze of each functional optical layer is 2% to 95%, and/or the light transmittance of each functional optical layer is 50% to 90%.

In an embodiment, the haze of the light-emitting functional optical layer is 2% to 95% and/or the light transmittance is 60% to 90%.

In an embodiment, the haze or light transmittance of each adhesive layer is 0.5% to 95%, for example, the light transmittance of each adhesive layer is 65% to 95%. Preferably, the haze or light transmittance of each adhesive layer is 0.5% to 80%.

In one implementation, the haze of the light-emitting adhesive layer ranges from 0.5% to 35%.

In an embodiment, the second three-dimensional structure of each functional optical layer is irregular surface undulations. Preferably, the arithmetic mean roughness of the surface of each functional optical layer is greater than 1 micron. More preferably, the arithmetic mean roughness of the surface of each functional optical layer is greater than 1 micron and less than 35 microns.

In one embodiment, the light-transmitting substrate includes polyethylene terephthalate (PET), polycarbonate (PC), polyethylene naphthalate (PEN) ) or poly(methyl methacrylate), PMMA).

In an embodiment, the ink of each light point intensity modulation unit includes light-shielding ink or photosensitive ink.

Preferably, the light-shielding ink includes printing ink. More preferably, the printing ink is mixed with any one of barium sulfate (BaSO ₄ ), titanium dioxide (TiO ₂ ) and mica powder or a combination thereof.

In an embodiment, the light transmittance of the light-shielding ink is 5% to 70%, and/or the haze is 5% to 99%.

In an embodiment, the color of the light-shielding ink is a light color hue with white as the base.

Preferably, the base of the photosensitive ink contains an acrylic cross-linked substance.

Preferably, the photosensitive ink is mixed with photochromic particles. After the photochromic particles absorb incident light in a specific wavelength range, each light point intensity modulation unit will emit a new color that is different from the original color of the incident light, and when the incident light disappears, each light point intensity modulation unit will emit a new color that is different from the original color of the incident light. The unit returns to its original color.

In one implementation, the light transmittance of the photosensitive ink is 3% to 50%, and/or the haze is 5% to 95%.

In one embodiment, each functional optical layer includes any one of glass beads, ultraviolet curable acrylic resin, quantum dot (QD) powder, and phosphor powder, or a combination thereof.

In one embodiment, each adhesive layer is a light-transmitting adhesive layer.

In one embodiment, each adhesive layer includes a light-transmitting self-adhesive adhesive or a light-transmitting hot-melt polymer.

Preferably, the self-adhesive adhesive includes optical clear adhesive (OCA) and/or pressure sensitive adhesive (PSA).

Preferably, the hot-melt polymer includes ethylene vinyl acetate copolymer (EVA), thermoplastic polyurethane (TPU) or polyvinyl chloride (PolyVinly Chloride, PVC). ).

In one embodiment, each adhesive layer contains additives. Preferably, the additive contains additive particles with a diameter of 50 nanometers to 5 microns. More preferably, the additive particles include any one of quantum dot (QD) powder, acrylic beads, glass beads, ultraviolet absorbers, fluorescent powder, photochromic particles or a combination thereof.

In one embodiment, the at least one adhesive layer is a plurality of adhesive layers, and the plurality of adhesive layers contain the same or different additives. The present invention combines different optical performance by individually adjusting the additive particles incorporated in the bonding layers of different layers, thereby improving the flexibility of the optical functional performance of the optical film of the present invention and enhancing the design adaptability to meet the needs of different applications. .

In an embodiment, the first three-dimensional structure of each light point intensity modulation unit includes at least one three-dimensional unit. Preferably, the shape of the cross section of each three-dimensional unit along the direction from the light incident surface to the light exit surface includes an arc or a polygon, such as a triangle, a rectangle, a semi-ellipse, a fan shape or a semicircle.

In one embodiment, the first three-dimensional structure of each light point intensity modulation unit includes any one of a microlens array, a micropyramid lens array, a concentric lens array, a microlens array, a high roughness scattering microstructure, or a combination thereof. . Preferably, the highly rough scattering microstructure means that the arithmetic mean roughness of the surface of each light point intensity modulation unit is greater than 1.5 microns.

In one embodiment, the first three-dimensional structure includes a plurality of annular structures forming concentric circles. Preferably, the shape of the cross section of each annular structure along the direction from the light incident surface to the light exit surface includes an arc or a polygon, such as a triangle, a rectangle, a semi-ellipse, a fan shape or a semicircle.

In an embodiment, the at least one light point intensity modulation unit does not fill the light point intensity modulation layer. Preferably, the light-emitting adhesive layer is filled into a part of the light point intensity modulation layer or fills the light point intensity modulation layer.

In one implementation, the difference in refractive index between the light-emitting adhesive layer and each light point intensity modulation unit is 0.02 to 1.05.

In an embodiment, each adhesive layer and/or each light point intensity modulation unit has a wavelength conversion structure. Preferably, the wavelength conversion structure is a gain-type wavelength conversion structure to facilitate conversion of short wavelengths into long wavelengths.

In an embodiment, the second three-dimensional structure of each functional optical layer includes at least one three-dimensional unit. Preferably, the shape of the cross section of each three-dimensional unit along the direction from the light incident surface to the light exit surface includes an arc or a polygon, such as a triangle, a rectangle, a semi-ellipse, a sector or a semicircle.

In an embodiment, the second three-dimensional structure of each functional optical layer includes a plurality of three-dimensional units that are the same or different from each other. Preferably, the plurality of three-dimensional units are spaced apart from each other. Even better, the plurality of three-dimensional units jointly form a one-dimensional linear, two-dimensional array or random distribution to further improve the light uniformity processing effect.

In one embodiment, the second three-dimensional structure of each functional optical layer includes any one of a microlens array, a micropyramid lens array, a concentric lens array, a microlens array, a highly rough scattering microstructure, or a combination thereof. Preferably, the highly rough scattering microstructure means that the arithmetic mean roughness of the surface of each light point intensity modulation unit is greater than 1.5 microns.

In one embodiment, the second three-dimensional structure of the light-incident functional optical layer includes a plurality of three-dimensional units that are the same or different from each other. Preferably, the plurality of three-dimensional units are spaced apart from each other. Even better, the plurality of three-dimensional units jointly form a one-dimensional linear, two-dimensional array or random distribution to further improve the light uniformity processing effect.

In one embodiment, the second three-dimensional structure of the light-emitting functional optical layer includes a plurality of three-dimensional units that are the same or different from each other. Preferably, the plurality of three-dimensional units are spaced apart from each other. Even better, the plurality of three-dimensional units jointly form a one-dimensional linear, two-dimensional array or random distribution to further improve the light uniformity processing effect.

In one embodiment, the plurality of functional optical layers further includes at least one additional functional optical layer adjacent to the light-incoming functional optical layer or the light-emitting functional optical layer; the at least one adhesive layer further includes at least one additional adhesive layer. layer, and the at least one additional adhesive layer is located between the light-incoming functional optical layer and the adjacent additional functional optical layer, and between the light-emitting functional optical layer and the adjacent additional functional optical layer , or between two adjacent additional functional optical layers.

Preferably, the additional functional optical layer is sequentially superimposed on the light-incident functional optical layer in a direction away from the light-transmitting substrate through an additional adhesive layer, and/or the additional functional optical layer is sequentially applied through an additional adhesive layer. The light-emitting functional optical layer is stacked in a direction away from the light-transmitting substrate.

By adding an additional functional optical layer and an additional adhesive layer, the present invention can further improve the flexibility of optical function performance and enhance the design adaptability to meet the needs of different applications.

In one embodiment, the plurality of functional optical layers further includes a first additional functional optical layer adjacent to the light-emitting functional optical layer; and the at least one adhesive layer further includes a first additional adhesive layer located at the light-emitting functional optical layer. between the optical layer and the first additional functional optical layer.

In one implementation, the plurality of functional optical layers further includes a first additional functional optical layer adjacent to the light-emitting functional optical layer; a second additional functional optical layer adjacent to the first additional functional optical layer; and A third additional functional optical layer is adjacent to the light-increasing functional optical layer; and the at least one adhesive layer further includes a first additional adhesive layer located between the light-emitting functional optical layer and the first additional functional optical layer; A second additional adhesive layer is located between the first additional functional optical layer and the second additional functional optical layer; and a third additional adhesive layer is located between the light incident optical layer and the third additional functional optical layer. between layers.

In an embodiment, the position of the at least one light point intensity modulation unit corresponds to the position of at least one external light source one-to-one. Preferably, the position of the at least one light point intensity modulation unit is aligned one-to-one with the position of the at least one external light source, and the center of each light point intensity modulation unit is aligned with the center of the corresponding external light source. The alignment error distance is 0 mm to 1.5 mm to further improve the light uniformity processing effect.

The present invention also provides a light source module, including a lamp panel and the above-mentioned optical film, wherein the lamp panel includes at least one light source, and the position of the at least one light point intensity modulation unit is one-to-one corresponding to the position of the at least one light source. Location.

Preferably, the position of the at least one light point intensity modulation unit is aligned one-to-one with the position of the at least one light source, and the center of each light point intensity modulation unit is aligned with the center of the corresponding light source. The error distance is 0 mm to 1.5 mm to further improve the effect of light uniformity processing.

In one implementation, the at least one light source includes a plurality of light sources, and the distance between two adjacent light sources is 0.02 mm to 10 mm to further improve the effect of light uniformity.

In one embodiment, the optical film of the present invention is used in an array light source module of LED backlight.

In an implementation aspect, the light source module of the present invention is an array light source module. Preferably, the light source module of the present invention is an array type light source module of LED backlight.

In summary, the optical film of the present invention integrates the light spot intensity modulation layer, the plurality of functional optical layers and the at least one adhesive layer. In addition to improving the effects of light uniformity and adjusting the light pattern, it also has the ability to improve optical function performance. It has the advantages of flexibility, enhanced design adaptability to meet different application needs, high mechanical strength and weather resistance, and can meet the needs of consumers.

Several examples are provided below to illustrate the implementation of the present invention; those skilled in the art can easily understand the advantages and effects achieved by the present invention through the content of this specification, and can make various modifications and improvements without departing from the spirit of the present invention. Modifications to implement or apply the contents of the present invention.

Example 1: Optical film

As shown in Figure 1, the optical film 1 of the present invention includes a light-transmissive substrate 10 with opposite light-incident surfaces 100 and light-emitting surfaces 101; a light point intensity modulation layer 11 connected to the light-emitting surface of the light-transmissive substrate 10 Surface 101; a plurality of functional optical layers 12, each connected to the light-transmissive substrate 10, and the plurality of functional optical layers 12 include a light-incident functional optical layer 120 adjacent to the light-incident surface 100 of the light-transmissive substrate 10; And a light-emitting functional optical layer 121, adjacent to the light-emitting surface 101 of the light-transmitting substrate 10; at least one adhesive layer (not labeled), that is, a light-emitting adhesive layer 130, is located between the light-emitting functional optical layer 121 and the light-transmitting layer 121. between the light-emitting surfaces 101 of the substrate 10; wherein the light point intensity modulation layer 11 includes at least one light point intensity modulation unit 110, and each of the light point intensity modulation units 110 includes ink or a first three-dimensional structure (not shown), and Each of the functional optical layers 12 includes a second three-dimensional structure (not shown), and the second three-dimensional structures of the functional optical layers 12 are the same as or different from each other.

The dotted line in FIG. 1 represents the upper limit of the thickness of the light point intensity modulation layer 11 , and the at least one light point intensity modulation unit 110 does not fill the light point intensity modulation layer 11 , and the light point is filled by the light emitting adhesive layer 130 Intensity modulation layer 11.

The haze of the light-transmitting substrate 10 is 0.1% to 99%; the light transmittance of each light point intensity modulation unit 110 is 20% to 60%; the arithmetic mean roughness of the surface of each functional optical layer 12 is greater than 1 micron; and the difference in refractive index between the light-emitting adhesive layer 130 and each light point intensity modulation unit 110 is 0.02 to 1.05.

The material of the light-transmitting substrate 10 includes polyethylene terephthalate or polycarbonate; the ink of each light point intensity modulation unit 110 can be a light-shielding ink or a photosensitive ink; the ink of each functional optical layer 12 The material includes ultraviolet curable acrylic resin; and the material of the at least one adhesive layer includes light-transmitting self-adhesive adhesive (such as optical glue or pressure-sensitive adhesive) or light-transmitting hot-melt polymer (such as ethylene- vinyl acetate copolymer, thermoplastic polychloroformate elastomer or polyvinyl chloride).

The first three-dimensional structure of each light point intensity modulation unit 110 may be a plurality of three-dimensional units, and the cross-section shape of each three-dimensional unit along the direction from the light incident surface 100 to the light exit surface 101 includes an arc or a polygon; or the The first three-dimensional structure is a plurality of annular structures forming concentric circles, and the cross-section shape of each annular structure along the direction from the light incident surface 100 to the light emitting surface 101 includes an arc or a polygon.

The second three-dimensional structure of each functional optical layer 12 includes at least one three-dimensional unit, and the cross-section shape of each three-dimensional unit along the direction from the light incident surface 100 to the light exit surface 101 includes an arc or a polygon. In addition, the second three-dimensional structure of the light-incoming functional optical layer 120 or the light-emitting functional optical layer 121 includes a plurality of three-dimensional units that are the same or different from each other, and the plurality of three-dimensional units are spaced apart from each other, and together form a one-dimensional linear, two-dimensional dimensional array or random distribution.

Furthermore, the at least one bonding layer or each of the light point intensity modulation units 110 may have a wavelength conversion structure, and the wavelength conversion structure is a gain-type wavelength conversion structure.

The optical film 1 of the present invention integrates the light point intensity modulation layer 11, the plurality of functional optical layers 12 and the at least one adhesive layer (not labeled), which can improve the effects of light uniformity and adjustment of light patterns.

Example 2: Optical film

As shown in FIG. 2 , compared with Embodiment 1, the plurality of functional optical layers 12 of the optical film 1 of the present invention further includes, in addition to the light-incoming functional optical layer 120 and the light-emitting functional optical layer 121 . An additional functional optical layer 122 is adjacent to the light-emitting functional optical layer 121; and the at least one adhesive layer 13, in addition to the light-emitting adhesive layer 130, further includes a first additional adhesive layer 131 located on the light-emitting functional optical layer. 121 and the first additional functional optical layer 122 .

Therefore, the first additional functional optical layer 122 of the present invention is connected to the light-emitting functional optical layer 121 through the first additional adhesive layer 131, which helps to improve the flexibility of optical function performance and enhance the design adaptability to meet the needs of different applications. .

Example 3: Optical film

As shown in FIG. 3 , compared with Embodiment 1, the plurality of functional optical layers 12 of the optical film 1 of the present invention further includes, in addition to the light-incoming functional optical layer 120 and the light-emitting functional optical layer 121 . An additional functional optical layer 122 is adjacent to the light-emitting functional optical layer 121; a second additional functional optical layer 123 is adjacent to the first additional functional optical layer 122; and a third additional functional optical layer 124 is adjacent to the incoming optical layer. The light functional optical layer 120; and the at least one adhesive layer 13, in addition to the light emitting adhesive layer 130, further includes a first additional adhesive layer 131 located between the light emitting functional optical layer 121 and the first additional functional optical layer. 122; the second additional adhesive layer 132, located between the first additional functional optical layer 122 and the second additional functional optical layer 123; and the third additional adhesive layer 133, located between the light-incident functional optical layer 120 and the third additional functional optical layer 124 .

In other words, compared with Embodiment 1, the first additional functional optical layer 122 passes through the first additional adhesive layer 131, and the second additional functional optical layer 123 passes through the second additional adhesive layer 132 and moves away from the transparent layer sequentially. The direction of the optical base material 13 is overlaid and connected to the light-emitting functional optical layer 121 , and the third additional functional optical layer 124 is overlaid and connected to the direction away from the light-transmitting base material 10 through the third additional adhesive layer 133 . Enter the light functional optical layer 120 .

Therefore, by adding different film layers, the optical film 1 of the present invention will not only have the above-mentioned elasticity of excellent optical function performance and high design adaptability to different application requirements, but also have high mechanical strength and weather resistance.

Example 4: Optical film set

As shown in Figure 4, the optical film assembly 2 of the present invention includes a lamp panel 20 and the optical film 1 of the above-mentioned Embodiment 2, wherein the lamp panel 20 includes at least one light source 200, and the at least one light point intensity modulation unit 110 The positions of at least one light source 200 should be matched one-to-one to further improve the effect of light uniformity processing. In addition, the distance between two adjacent light sources 200 is 0.02 mm to 10 mm.

FIG. 5 is a schematic diagram of at least one light point intensity modulation unit 110 distributed in a two-dimensional array. Therefore, as shown in FIGS. 4 and 5 , the at least one light source 200 will also exhibit the same two-dimensional array distribution.

Therefore, the present invention can indeed effectively improve the effect of light uniformity processing under the condition that the light propagation distance is extremely limited, so as to effectively eliminate the hot spot phenomenon of point light sources.

1: Optical film 10: Transparent substrate 100: light incident surface 101: Lighting surface 11: Light spot intensity modulation layer 110: Light spot intensity modulation unit 12: Functional optical layer 120: Light incident functional optical layer 121: Light emitting functional optical layer 122: First additional functional optical layer 123: Second additional functional optical layer 124: The third additional functional optical layer 13: Next layer 130: Lighting bonding layer 131: First additional bonding layer 132: Second additional bonding layer 133: The third additional bonding layer 2: Optical film group 20:Light board 200:Light source

Figure 1 is a schematic cross-sectional view of an embodiment of the optical film of the present invention. Figure 2 is a schematic cross-sectional view of an embodiment of the optical film of the present invention. Figure 3 is a schematic cross-sectional view of an embodiment of the optical film of the present invention. FIG. 4 is a schematic cross-sectional view of an embodiment of the light source module of the present invention. Figure 5 is a schematic diagram of the distribution of light point intensity modulation units of the present invention.

without

1: Optical film 10: Transparent substrate 100: light incident surface 101: Lighting surface 11: Light spot intensity modulation layer 110: Light spot intensity modulation unit 12: Functional optical layer 120: Light incident functional optical layer 121: Light emitting functional optical layer 130: Lighting bonding layer

Claims (14)

An optical film containing A light-transmitting substrate with opposite light-incoming surfaces and light-emitting surfaces; A light point intensity modulation layer connected to the light exit surface of the light-transmitting substrate; A plurality of functional optical layers are each connected to the light-transmitting substrate, and the plurality of functional optical layers include a light-incident functional optical layer adjacent to the light-incident surface of the light-transmissive substrate; and a light-emitting functional optical layer, adjacent to the light-emitting surface of the light-transmitting substrate; At least one adhesive layer, including a light-emitting adhesive layer, is located between the light-emitting functional optical layer and the light-emitting surface of the light-transmissive substrate; wherein the light point intensity modulation layer includes at least one light point intensity modulation unit, and each light point intensity modulation unit The point intensity modulation unit includes ink or a first three-dimensional structure, and each functional optical layer includes a second three-dimensional structure, and the second three-dimensional structures of each functional optical layer are the same or different from each other. The optical film according to claim 1, wherein the haze of the light-transmitting substrate is 0.1% to 99%, the light transmittance of each light point intensity modulation unit is 20% to 60%, and the functional optical layer The haze or light transmittance is 1% to 99%, the arithmetic mean roughness of the surface of each functional optical layer is greater than 1 micron, and the haze or light transmittance of each adhesive layer is 0.5% to 95%. The optical film of claim 1, wherein the ink of each light point intensity modulation unit includes light-shielding ink or photosensitive ink, the first three-dimensional structure of each light point intensity modulation unit includes at least one three-dimensional unit, and each of the light point intensity modulation units includes at least one three-dimensional unit. The shape of the cross section of the three-dimensional unit along the direction from the light incident surface to the light exit surface includes an arc or a polygon. The optical film according to claim 1, wherein the first three-dimensional structure includes a plurality of annular structures forming concentric circles, and the cross-section shape of each annular structure along the direction from the light incident surface to the light exit surface includes an arc shape. or polygon. The optical film according to claim 1, wherein the at least one light point intensity modulation unit does not fill the light point intensity modulation layer, and the light exit adhesive layer fills a part of the light point intensity modulation layer or fills the light point intensity modulation layer. The light point intensity modulation layer; the haze of the light-emitting adhesive layer is 0.5% to 35%; and the haze of the light-emitting functional optical layer is 2% to 95% or the light transmittance is 60% to 90%. The optical film according to claim 1, wherein the difference in refractive index between the light-emitting adhesive layer and each of the light point intensity modulation units is 0.02 to 1.05. The optical film according to claim 1, wherein each of the adhesive layers or each of the light point intensity modulation units has a wavelength conversion structure, and the wavelength conversion structure is a gain-type wavelength conversion structure. The optical film according to claim 1, wherein the second three-dimensional structure of each functional optical layer includes at least one three-dimensional unit, and the shape of the cross section of each three-dimensional unit along the direction from the light incident surface to the light exit surface includes an arc. shape or polygon. The optical film according to claim 1, wherein the second three-dimensional structure of the light-incoming functional optical layer or the light-emitting functional optical layer includes a plurality of three-dimensional units that are the same or different from each other, and the plurality of three-dimensional units are spaced apart from each other, and Together they form a one-dimensional linear, two-dimensional array or random distribution. The optical film of claim 1, wherein the plurality of functional optical layers further includes at least one additional functional optical layer adjacent to the light-incoming functional optical layer or the light-emitting functional optical layer; the at least one adhesive layer further includes At least one additional adhesive layer, and the at least one additional adhesive layer is located between the light-increasing functional optical layer and the adjacent additional functional optical layer, and is located between the light-emitting functional optical layer and the adjacent additional functional optical layer. between layers, or between two adjacent additional functional optical layers. The optical film of claim 1, wherein the plurality of functional optical layers further includes a first additional functional optical layer adjacent to the light-emitting functional optical layer; a second additional functional optical layer adjacent to the first additional functional optical layer Optical layer; and a third additional functional optical layer adjacent to the light-incoming functional optical layer; and the at least one adhesive layer further includes a first additional adhesive layer located between the light-emitting functional optical layer and the first additional functional optical layer. between the layers; a second additional adhesive layer located between the first additional functional optical layer and the second additional functional optical layer; and a third additional adhesive layer located between the light incident functional optical layer and the third additional functional optical layer between additional functional optical layers. The optical film according to claim 1, wherein the positions of the at least one light point intensity modulation unit respectively correspond one-to-one to at least one external light source. A light source module, including a lamp panel and the optical film according to any one of claims 1 to 11, wherein the lamp panel includes at least one light source, and the at least one light point intensity modulation unit is positioned in a pair A pair should have at least one light source. The light source module of claim 13, wherein the at least one light source includes a plurality of light sources, and the distance between two adjacent light sources is 0.02 mm to 10 mm.

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