TWI818440B - Optical film and light module - Google Patents

Abstract

An optical film includes a light-transmitting substrate, a microstructure layer and a color conversion layer. The light-transmitting substrate includes a first side and a second side opposite to each other. The microstructure layer is arranged on the first side of the light-transmitting substrate to adjust the light shape of an incident light. The color conversion layer is arranged on the second side of the light-transmitting substrate, or between the light-transmitting substrate and the microstructure layer, or on the side of the microstructure layer away from the light-transmitting substrate. The conversion layer has an original color, and at least a part of the color conversion layer is converted from the original color into a modulated color by absorbing energy. The present invention also provides a self-dimming light source module.

Description

Optical films and light source modules

The present invention relates to an optical film and a light source module, in particular to an optical film and a light source module with a color conversion layer.

When using an LED array light panel, due to the point light source characteristics of the LED itself, the high-energy and concentrated beam emitted can easily cause hot spots, resulting in poor uniformity of light output from the LED array light panel. In addition, , Long-term exposure to high-energy beams can also easily damage the corresponding parts of the optical film (board) components covering the LED array light board.

In order to solve the hot-spot problem, the common practice is to apply light-shielding ink on the optical film (board) component corresponding to the LED light emission point. The light-shielding ink can be of various colors such as white, black or blue. However, the optical film (printed with light-shielding ink) Board) components must be aligned with each LED unit of the LED array light panel during assembly, which increases the processing difficulty, accuracy and assembly time of the LED light source module.

In order to solve the above problems, the present invention provides a color-changing optical film. The optical film includes a color conversion layer. When the color conversion layer is irradiated by incident light, the color conversion layer located in the reaction area within the direct range of the incident light will absorb The energy of the incident light produces a darker color effect. When the incident light is stronger, the color of the color conversion layer becomes darker, which reduces the light transmission of the optical film in the corresponding reaction area, thus reducing the brightness of the output light. , and the part of the color conversion layer that is not directly exposed to incident light Because the incident light received is weak, this part of the color conversion layer does not produce a color change effect or has a small darkening effect, and the brightness of this part of the output light does not change or decreases to a small extent. In addition, the color conversion layer can also be a microstructure color conversion layer or a patterned color conversion layer.

In addition, this kind of optical film can be used in light source modules. The color conversion layer on the optical film changes its color according to the incident light energy it receives to adjust the amount of light transmission of the optical film, that is, the brightness of the output light. This improves the overall light output uniformity of the light source module. Furthermore, because the color conversion layers in different areas on the optical film can independently adjust the brightness of the output light of each area based on the incident light energy received by each area, the optical film does not need to be attached to the light source component when assembled in the light source module. The light-emitting unit performs high-precision alignment, simplifying the assembly process and reducing assembly time. In addition, the color conversion layer can also be directly disposed on the light-emitting side of the light source component of the light source module, thereby further eliminating the cost of the light-transmitting substrate and reducing the thickness of the light source module.

The optical film provided by the invention includes a light-transmitting base material, a microstructure layer and a color conversion layer. The light-transmitting base material has an opposite first side and a second side, and the microstructure layer is disposed on the first side of the light-transmitting base material. side to adjust the light shape of the incident light. The color conversion layer can be disposed on the second side of the light-transmitting base material, between the light-transmitting base material and the microstructure layer, or on the side of the microstructure layer away from the light-transmitting base material. The color conversion layer has an initial color, and by absorbing energy, at least a part of the color conversion layer is converted from the initial color into a modulated color.

The optical film provided by the invention includes a light-transmitting base material and a microstructure color conversion layer. The microstructure color conversion layer is provided on the light-transmitting base material to adjust the light shape of incident light. The microstructure color conversion layer has an initial color. By absorbing energy, at least a portion of the microstructure color conversion layer is converted from an initial color to a modulated color.

The optical film provided by the present invention includes a light-transmitting base material and a patterned color conversion layer. The patterned color conversion layer is provided on the light-transmitting base material. The patterned color conversion layer has a plurality of color conversion units. One of the plurality of color conversion units There is a gap between them, part of the incident light passes through the gap, and the other part of the incident light Through the plurality of color conversion units, the color conversion units have an initial color, and at least a part of the color conversion units are converted from the initial color to the modulated color by absorbing energy.

The self-adjusting light source module provided by the present invention includes a light source component and an optical film. The light source component has a light-emitting side. The optical film is disposed on the light-emitting side of the light source component. The optical film includes a light-transmitting base material and a color conversion layer. , the light-transmitting substrate includes opposite surface light sides and light-emitting sides, the surface-light side faces the light-emitting side of the light source component, and the light-emitting side is away from the light-emitting side. The color conversion layer is arranged on the surface light side or the light-emitting side of the light-transmitting substrate. The conversion layer has an initial color, and by absorbing energy, at least a part of the color conversion layer is converted from the initial color into a modulated color.

The self-adjusting light source module provided by the present invention includes a light source module and an optical film. The light source component has a light-emitting side, and the optical film is disposed on the light-emitting side of the light source component. The optical film includes a light-transmitting base material, a micro-film Structural layer and color conversion layer, the light-transmissive base material has opposite first and second sides, the microstructure layer is provided on the first side of the light-transmissive base material to adjust the light shape of the incident light, the color conversion layer can be provided On the second side of the light-transmitting base material, between the light-transmitting base material and the microstructure layer, or on the side of the microstructure layer away from the light-transmitting base material, the color conversion layer has an initial color, and by absorbing energy, at least part of the color conversion layer The color conversion layer converts the original color to the modulated color.

The self-adjusting light source module provided by the present invention includes a light source module and an optical film. The light source component has a light-emitting side. The optical film is disposed on the light-emitting side of the light source component. The optical film includes a light-transmitting base material and a micro-film. Structural color conversion layer, the microstructure color conversion layer is provided on the light-transmitting substrate to adjust the light shape of the incident light. The microstructure color conversion layer has an initial color, and by absorbing energy, at least a part of the microstructure color conversion layer Converts the original color to the modulated color.

The self-adjusting light source module provided by the present invention includes a light source module and an optical film. The light source component has a light-emitting side. The optical film is disposed on the light-emitting side of the light source component. The optical film includes a light-transmitting base material and a pattern. Color conversion layer, the patterned color conversion layer is provided on the light-transmitting substrate, the patterned color conversion layer has a plurality of color conversion units, and there are intervals between the plurality of color conversion units, and a part of The incident light passes through the space, and another part of the incident light passes through a plurality of color conversion units. The color conversion units have an initial color, and by absorbing energy, at least a part of the color conversion units are converted from the initial color to a modulated color.

The self-adjusting light source module provided by the present invention includes a light source component and a color conversion layer. The light source component has a light-emitting side. The color conversion layer is arranged on the light-emitting side of the light source component. The color conversion layer has an initial color and absorbs energy. At least a portion of the color conversion layer is converted from an initial color to a modulated color.

The optical film of the present invention uses a color conversion layer that can absorb energy and change color. When the light is stronger, the color of the color conversion layer becomes darker, causing the amount of light transmission corresponding to the direct incident light area on the optical film to decrease. , thereby reducing the brightness of the output light in the area corresponding to the direct incident light on the optical film. Therefore, the optical film of the present invention can be applied to any place where light brightness or light uniformity needs to be adjusted.

Furthermore, the optical film of the present invention can be provided with a microstructure layer. Through the geometric structure of the microstructure layer itself and optical properties such as material refractive index and reflectivity, the light shape of the incident light can be changed. For example, the light shape emitted by an LED point light source can be concentrated. The light beam is dispersed into multiple light beams, which can improve the light concentration problem of point light sources. At the same time, the microstructure layer can also be designed according to the preset light distribution pattern of the output light.

In addition, since the self-adjusting light source module of the present invention uses an optical film with a color conversion layer or has a color conversion layer, it can automatically adjust the output light brightness distribution of the overall light source module to improve the output light of the overall light source module. The problem of uneven brightness. In addition, when the optical film or color conversion layer with a color conversion layer is used in a light source module, it does not need to be assembled with high-precision alignment with the light-emitting unit on the light source component, thereby simplifying the assembly process and reducing labor costs. Hour.

In order to make the above and other objects, features and advantages of the present invention more clearly understood, embodiments are given below and described in detail with reference to the accompanying drawings.

10, 10A, 10B, 10C, 10D, 10E: Optical film

100, 100A, 100B, 100C, 100D: light source module

11: Transparent substrate

111: First side

112:Second side

113:Smooth side

114: Light side

12: Color conversion layer

12A: Microstructure color conversion layer

12B: Patterned color conversion layer

121:Microstructure color conversion unit

122: Color conversion unit

123:Interval

13:Microstructure layer

131:Microstructural unit

131A:Structure

1311: Tip

1312: Side end

132: Gap

14:Light source component

141:Light-emitting unit

142: Luminous side

Z: reaction block

D1: first direction

D2: second direction

L1, L1’: incident light

L2, L2’: output light

L3, L6: light

L4: Direct light

L5: oblique light

Figures 1 to 6 are respectively schematic structural diagrams of optical films according to different embodiments of the present invention.

Figures 7 to 11 are respectively schematic structural diagrams of self-adjusting light source modules according to different embodiments of the present invention.

The invention will now be described in more detail by way of example with reference to the accompanying drawings.

Figures 1 to 6 are respectively schematic structural diagrams of optical films according to different embodiments of the present invention. As shown in FIG. 1 , the optical film 10 includes a light-transmitting base material 11 and a color conversion layer 12 . The light-transmitting base material 11 includes an opposite first side 111 and a second side 112 . The color conversion layer 12 is disposed on the light-transmitting base material. On the first side 111 of 11, the color conversion layer 12 has an initial color, and by absorbing energy, at least a part of the color conversion layer 12 can be converted from the initial color to a modulated color. For example, as shown in Figure 1, the incident light L1/L1' passes through the light-transmitting substrate 11 and the color conversion layer 12 to generate the output light L2/L2', where the incident light L1 is directed toward the light-transmitting substrate along the first direction D1, for example. The first side 111 of the light-transmitting base material 11 is incident, and the incident light L1' is incident toward the second side 112 of the light-transmitting base material 11 along the second direction D2, for example. Here, for the purpose of simplicity, the description of the following embodiments all draws the incident light L1 into the optical film along the first direction D1 and the incident light L1' into the optical film along the second direction D2 in the same figure. in the formula.

Continuing from the above description, the color conversion layer 12 exhibits an initial color in the initial state. After absorbing the energy of the incident light L1/L1', at least a part of the color conversion layer 12 produces a discoloration reaction and forms a reaction block Z, and the reaction block Z appears. Modulating the color, wherein the brightness of the modulated color is lower than the brightness of the initial color, so the above-mentioned color change reaction can be a decrease in the color brightness value. The incident light L1 that is directly incident on the color conversion layer 12 or the incident light L1' that is incident on the color conversion layer 12 through the light-transmitting substrate 11 is absorbed by the material in the reaction zone Z after passing through the color conversion layer 12. And because the brightness of the modulated color after color change is low, the brightness of the output light L2/L2' of the part of the optical film 10 corresponding to the reaction area Z is small. The light transmission amount of the optical film 10 is adjusted based on the brightness of the incident light L1/L1'. In this embodiment, the incident light L1 from the first direction D1 or the incident light L1' from the second direction D2 have the same effect of adjusting the light transmission amount through the color conversion layer 12 .

In the embodiment shown in FIG. 1 , the color conversion layer 12 is disposed on the first side 111 of the light-transmissive base material 11 , but it is not limited thereto. The color conversion layer 12 can also be disposed on the second side 112 . Or both the first side 111 and the second side 112 are provided with colored conversion layers 12 .

In one embodiment, the haze of the light-transmitting substrate 11 may range from 0.1% to 99%. In one embodiment, the color conversion layer 12 may include a light-sensitive organic material. The light-sensitive organic material will produce a color-changing reaction when irradiated by light with a wavelength between 400 nm and 480 nm, for example. In one embodiment, the color conversion layer 12 may include a temperature-sensitive material. The temperature-sensitive material may generate a color-changing reaction after receiving energy from an environmental heat source, where the temperature of the environmental heat source is, for example, between 30°C and 90°C. In another embodiment, the color conversion layer 12 may have diffusion particles (not shown) with a particle size ranging from about 1 μm to 30 μm, and the diffusion particles are evenly distributed in the color conversion layer 12 .

In addition to the above-mentioned light-transmitting base material 11 and color conversion layer 12, the optical film 10 may further include a microstructure layer 13. As shown in FIG. 2 , FIG. 3 and FIG. 4 , the optical film 10A/10B/10C includes a light-transmitting base material 11 , a color conversion layer 12 and a microstructure layer 13 . The light-transmitting base material 11 includes an opposite first side 111 and a second side 112 . The microstructure layer 13 is disposed on the first side 111 of the light-transmitting base material 11 . The color conversion layer 12 can be disposed on the second side of the light-transmitting base material 11 . The side 112 is either provided between the light-transmitting substrate 11 and the microstructure layer 13 , or is provided on the side of the microstructure layer 13 away from the light-transmitting substrate 11 . FIG. 2 , FIG. 3 and FIG. 4 respectively illustrate different implementations of the arrangement relationships between the light-transmitting substrate 11 , the color conversion layer 12 and the microstructure layer 13 . Among them, the microstructure layer 13 in the optical film 10A/10B/10C can change the light shape of the incident light L1/L1' through its own geometric structure and optical properties such as material refractive index and reflectivity. When the incident light L1/L1' After passing through the microstructure layer 13, the output light L2/L2' with a direction and distribution different from the incident light L1/L1' can be produced. Among them, the incident light L1 means that the light enters the optical film along the first direction D1. 10A/10B/10C, the incident light L1’ means that the light enters the optical film 10A/10B/10C along the second direction D2.

The materials and characteristics of the light-transmitting base material 11 and the color conversion layer 12 are the same as those described in the previous embodiments, and will not be described again here. In one embodiment of the present invention, the microstructure layer 13 is composed of a plurality of microstructure units 131. The microstructure units 131 can be made of highly transparent polymer organic materials. The characteristic size of the microstructure units 131 is between 2 μm and 60 μm. , the average refractive index of the multiple microstructural units 131 is between 1.4 and 1.65. In an embodiment of the present invention, the microstructure unit 131 may be a hemispherical shape, a hemispherical shape, or a structure with a continuous concave and convex cross section, such as a square, wavy or sawtooth structure.

As shown in Figure 2, an optical film 10A according to an embodiment of the present invention includes a light-transmitting base material 11, a color conversion layer 12 and a microstructure layer 13. The microstructure layer 13 is disposed on the first side 111 of the light-transmitting base material 11. The color conversion layer 12 is disposed between the light-transmitting substrate 11 and the microstructure layer 13 . In one embodiment, the plurality of microstructure units 131 in the microstructure layer 13 is, for example, a pixel structure 131A, and the tip 1311 of the pixel structure 131A faces a side away from the color conversion layer 12. When the incident light L1 is directed in the first direction, D1 is incident on the optical film 10A. At this time, the tip 1311 of the 稜珡 structure 131A faces the incident light L1. The incident light L1 will first pass through the microstructure layer 13. The optical properties of the body) will refract and disperse the incident light L1, thereby dispersing the single incident light L1 into a plurality of light beams. Therefore, the incident light L1 will be incident in the form of a plurality of light beams after passing through the microstructure layer 13. Color conversion layer 12, and according to the degree of dispersion of the plurality of light beams, a plurality of reaction blocks Z with similar discoloration degrees are formed in the color conversion layer 12, or a reaction block Z with a larger range is formed. The plurality of light beams incident on the color conversion layer 12 After absorbing part of the energy through the materials in each reaction block Z, a plurality of output lights L2 with lower brightness are generated.

Please continue to refer to FIG. 2. When the incident light L1' is incident on the optical film 10A in the second direction D2, the tip 1311 of the structure 131A is located on the other side of the incident side of the incident light L1', and the incident light L1' will pass through first. The light-transmitting substrate 11 passes through the color conversion layer 12 and then is incident on the microstructure layer 13. When the incident light L1' is incident on the microstructure layer 13, When the two ends 1312 of the bottom of the structure 131A in the structural layer 13 are exposed, part of the light incident on the microstructure layer 13 will be refracted back to the color conversion layer 12, so that the color conversion layer 12, in addition to receiving the energy of the original incident light L1', The light that has been output by the color conversion layer 12 to the microstructure layer 13 will return to the color conversion layer 12, so that the reaction block Z generated by receiving the energy of the incident light L1' in the color conversion layer 12 receives the energy again , and the difference in the degree of discoloration occurs due to the difference in the amount of energy received, forming a pattern in which the color is darker in the middle with a higher degree of discoloration, and lighter in color on both sides with a lower degree of discoloration. In one embodiment of the present invention, the degree of discoloration of the reaction block Z in the color conversion layer 12 can be enhanced through the microstructure layer 13, thereby causing the light transmission amount of the portion of the optical film 10A corresponding to the reaction block Z to become lower. Then the output light L2' with lower brightness is output, and the light reflected by the microstructure layer 13 causes different degrees of discoloration effects in the single reaction block Z, which also increases the diversity of the light emission patterns of the output light L2'. Therefore, the optical film 10A of the embodiment of the present invention can enable the matched self-dimming light source module to have a more uniform and diverse light distribution pattern.

Please refer to FIG. 3 . An optical film 10B according to an embodiment of the present invention includes a light-transmitting base material 11 , a microstructure layer 13 and a color conversion layer 12 . The microstructure layer 13 and the color conversion layer 12 are disposed on the light-transmitting base material 11 . The first side 111 , and the color conversion layer 12 is disposed on the side of the microstructure layer 13 away from the light-transmitting substrate 11 . As shown in Figure 3, the color conversion layer 12 is disposed on the side of the microstructure layer 13 away from the light-transmitting substrate 11. The color conversion layer 12 can be disposed on the microstructure layer 13 in a layered manner (as shown in Figure 3 ), but is not limited to this. The color conversion layer 12 can also fill the gaps 132 between the plurality of microstructure units 131 according to the geometric structure of the microstructure layer 13, so that there is no gap between the color conversion layer 12 and the microstructure layer 13. any gas. When the incident light L1 is incident on the optical film 10B in the first direction D1, the incident light L1 will first pass through the color conversion layer 12. After receiving the energy from the incident light L1, the color conversion layer 12 generates a discolored reaction area Z, and the incident light L1 After passing through the discolored reaction area Z in the color conversion layer 12, the brightness decreases and enters the microstructure layer 13 with a lower brightness. In one embodiment of the present invention, the plurality of microstructure units 131 of the microstructure layer 13 are, for example, It is the 稜顡 structure 131A. At this time, the tip 1311 of the 稜鏡 structure 131A faces the incident light L1, and the brightness decreases. After the incident light L1 enters the microstructure layer 13, the incident light L1 is dispersed into multiple light beams due to the optical characteristics of the microstructure layer 13, and then passes through the optical film 10B through the light-transmitting base material 11. At this time, the output light L2 is A light beam, and because the single incident light L1 that originally entered the microstructure layer 13 is dispersed into a plurality of light beams by the light structure 131A, the average brightness of the output light L2 will be higher than that of the light incident from the color conversion layer 12 to the microstructure layer 13 The average brightness is lower.

Please continue to refer to FIG. 3 . When the incident light L1 ′ enters the optical film 10B from the second direction D2 , the incident light L1 ′ first enters the light-transmitting substrate 11 and then travels to the microstructure layer 13 . At this time, the tip of the 稜鏡 structure 131A 1311 is located on the other side of the incident side of the incident light L1'. When the incident light L1' is incident on both sides 1312 of the bottom of the microstructure structure 131A, part of the light that has entered the microstructure layer 13 will be refracted back, so a The light with stronger brightness in the middle and weaker brightness on both sides enters the color conversion layer 12, causing a reaction block Z to be formed in the color conversion layer 12. The center of the reaction block Z has a high degree of discoloration and therefore low light transmission, and the two sides change color. The weak areas have a high amount of light transmission, thereby forming an output light L2' with a central brightness lower than the peripheral brightness. Therefore, the optical film 10B of the embodiment of the present invention can be used to produce special visual effects, such as decoration. Use light fixtures.

Please refer to Figure 4. An optical film 10C according to an embodiment of the present invention includes a light-transmitting base material 11, a color conversion layer 12 and a microstructure layer 13. The color conversion layer 12 and the microstructure layer 13 are respectively disposed on the light-transmitting base material 11. On different sides, as shown in FIG. 4 , the microstructure layer 13 is provided on the first side 111 of the light-transmitting substrate 11 , and the color conversion layer 12 is provided on the second side 112 of the light-transmitting substrate 11 . However, the present invention does not take this as an example. limit. The plurality of microstructure units 131 of the microstructure layer 13 are, for example, microstructures 131A. When the incident light L1 is incident on the optical film 10C in the first direction D1, at this time, the tip 1311 of the lens structure 131A faces the incident light L1, and the incident light L1 will first pass through the microstructure layer 13. Since the optical properties of the lens structure 131A will be The incident light is refracted and dispersed, and the single incident light L1 is dispersed into a plurality of light beams. Therefore, the incident light L1 enters the light-transmitting substrate 11 in the form of a plurality of light beams after passing through the microstructure layer 13, and then is incident again. The color conversion layer 12 forms multiple reaction blocks Z or a larger range of reaction blocks Z. The incident light L1 undergoes color conversion. After the reaction block Z in the layer 12 is replaced, the energy is absorbed to produce a plurality of output lights L2, where the brightness of the output light L2 is lower than the brightness of the incident light L1.

Please continue to refer to Figure 4. When the incident light L1' is incident on the optical film 10C in the second direction D2, the incident light L1' first passes through the color conversion layer 12. The material in the color conversion layer 12 absorbs energy and generates the reaction block Z. After the light L1' passes through the darker reaction area Z in the color conversion layer 12, the brightness decreases, passes through the light-transmitting substrate 11 and then enters the microstructure layer 13. At this time, the tip 1311 of the light structure 131A is in the incident light L1' On the other side of the incident side, the incident light L1' whose brightness has decreased is refracted back to part of the light by the phosphorus structure 131A, forming an output light L2' whose center brightness is higher than the peripheral brightness.

In the optical film 10A/10B/10C shown in Figures 2 to 4, the light shape of the incident light L1/L1' is changed through the geometric structure of the microstructure layer 13 itself and optical properties such as material reflectivity and refractive index. And when the incident light L1/L1' is incident from different directions, output light L2/L2' with different distribution patterns will be produced. In the above embodiment, the incident direction of the incident light L1/L1' is only the first direction D1 and the second direction D2 as shown in Figures 2 to 4. However, this is not a limitation. The incident light L1/L1' can be in any direction. Angle incidence optical film 10A/10B/10C.

In an optical film according to an embodiment of the present invention, the color conversion layer 12 and the microstructure layer 13 can be integrated into a microstructure color conversion layer 12A. Please refer to FIG. 5 for an optical film 10D according to an embodiment of the present invention. It includes a light-transmitting base material 11 and a microstructure color conversion layer 12A. The light-transmitting base material 11 includes an opposite first side 111 and a second side 112. The microstructure color conversion layer 12A can be disposed on the first side 111 and the second side. A microstructured color conversion layer 12A is provided on one or both sides of the two sides 112 . The material and characteristics of the light-transmitting substrate 11 are as in the aforementioned embodiments, and the materials and characteristics of the microstructured color conversion layer 12A are as in the aforementioned embodiments. The color conversion layer 12 and the microstructure layer 13 will not be described again here.

Continuing from the above description, the microstructure color conversion layer 12A exhibits an initial color in the initial state. After absorbing the energy of the incident light L1/L1', at least a part of the microstructure color conversion layer 12A produces a color change reaction and forms a reaction block Z. The reaction Block Z presents a modulated color, where the brightness of the modulated color The brightness is lower than the initial color, so the color change reaction may be a decrease in the color brightness value. After the incident light L1/L1' passes through the microstructure color conversion layer 12A, the energy is absorbed by the material in the reaction zone Z, and due to the low brightness of the modulated color after the color change, the optical film 10 corresponds to the reaction zone Z. The brightness of part of the output light L2/L2' is smaller than the brightness of the incident light L1, thereby adjusting the light transmission amount of the optical film 10D.

In addition, the microstructure color conversion layer 12A is composed of a plurality of microstructure color conversion units 121. The geometric structure and material refractive index, reflectivity and other optical properties of the microstructure color conversion layer 12A itself can change the light intensity of the incident light L1/L1'. Therefore, as shown in FIG. 5 , in one embodiment of the present invention, when the incident light L1 is incident on the optical film 10D having the microstructure color conversion layer 12A along the first direction D1, the output light L2 is generated, where, The brightness of the output light L2 is lower than the brightness of the incident light L1, and the incident light L1 is divided into a plurality of output lights L2. When the incident light L1' is incident on the optical film 10D along the second direction D2, part of the light incident on the microstructure color conversion unit 121 will be reflected back, and because the reaction zone Z is formed on the microstructure color conversion layer 12A, the output is generated The overall brightness of the light L2' is lower than the incident light L1', and the center brightness of the output light L2' is higher than the brightness on both sides.

In an optical film according to an embodiment of the present invention, the above-mentioned microstructure color conversion layer 12A can be replaced by a patterned color conversion layer 12B. Please refer to FIG. 6. An optical film 10E according to an embodiment of the present invention includes a transparent film. The light substrate 11 and the patterned color conversion layer 12B. The light-transmitting substrate 11 includes an opposite first side 111 and a second side 112. The patterned color conversion layer 12B has a plurality of color conversion units 122. The plurality of color conversion units 122 There is a gap 123 in between. The material and characteristics of the light-transmitting substrate 11 are the same as in the previous embodiments. The materials and characteristics of the patterned color conversion layer 12B are the same as the color conversion layer 12 in the previous embodiments, which will not be described again.

Continuing from the above description, the color conversion unit 122 exhibits an initial color in the initial state. After absorbing the energy of the incident light L1, at least a part of the color conversion unit 122 generates a color change reaction and forms a reaction block Z. The reaction block Z exhibits a modulated color. , wherein the brightness of the modulated color is lower than the brightness of the initial color, so the color change reaction may be a decrease in the color brightness value. As shown in Figure 6, the patterned The color conversion layer 12B is disposed on the first side 111 , but it is not limited thereto. The patterned color conversion layer 12B can also be disposed on the second side 112 of the light-transmitting substrate 11 , or on both sides of the light-transmitting substrate 11 . Patterned color conversion layers 12B are provided on both sides. Different from the color conversion layer 12 shown in FIG. 1 , the patterned color conversion layer 12B is in a specific pattern or geometric distribution form on the light-transmitting substrate 11 , which means that not the entire surface of the light-transmitting substrate 11 is provided with patterned colors. Color conversion unit 122 of conversion layer 12B.

In addition, FIG. 6 illustrates incident light L1 and light L3 incident on the optical film 10E from the first direction D1, in which the incident light L1 is incident on the color conversion unit 122 of the patterned color conversion layer 12B located on the first side 111. , and the light L3 is incident on the interval 123 on the optical film 10E, that is, the area on the optical film 10E that is not covered by the color conversion unit 122. Among them, the material in the color conversion unit 122 absorbs the energy of the incident light L1 to generate a reaction block Z. The energy of the incident light L1 is absorbed by the material in the reaction block Z, and then the brightness is reduced, and then passes through the light-transmitting substrate 11 to form an output. The light L2 is used to adjust the light transmission amount of the portion of the optical film 10E corresponding to the reaction zone Z. The energy of the light L3 is not absorbed by the material in the color conversion unit 122, so the light L3 will be directly guided out of the light-transmitting substrate 11 without any change in the amount of light transmission due to the patterned color conversion layer 12B.

Figures 7 to 11 are respectively schematic structural diagrams of self-adjusting light source modules according to different embodiments of the present invention. As shown in FIG. 7 , a self-adjusting light source module 100 according to an embodiment of the present invention includes a light source component 14 and an optical film 10 . The light source component 14 has a plurality of light-emitting units 141 . The optical film 10 is disposed between the light source component 14 On the light-emitting side 142, the optical film 10 includes a light-transmitting base material 11 and a color conversion layer 12. The light-transmitting base material 11 has an opposite surface light side 113 and a light exit side 114. The surface light side 113 faces the light emitting side 142, and the light exit side 114 As the side of the light-transmissive substrate 11 away from the light-emitting side 142 , the color conversion layer 12 can be disposed on the surface light side 113 or the light-emitting side 114 of the light-transmissive substrate 11 . The materials and characteristics of the light-transmitting base material 11 and the color conversion layer 12 are the same as the aforementioned embodiments of the optical film, and will not be described again here. As shown in FIG. 7 , when the light-emitting unit 141 on the light source assembly 14 emits a point light source, due to the characteristics of the point light source, the direct light L4 with strong directivity and high energy in the center and the oblique light L5 with weaker energy in the surroundings are incident together. The optical film 10 forms a reaction area Z with a high degree of discoloration in the center and a low degree of discoloration on both sides in the color conversion layer 12, so that the light transmission amount of the part of the optical film 10 corresponding to the reaction area Z is the center light transmission amount. The light transmittance is low and the light transmittance on both sides is high, thereby adjusting the brightness of each point light source of the light-emitting unit 141 so that the brightness of the light emitted by the entire self-adjusting light source module 100 can become uniform. For the purpose of concise explanation, the embodiments of the self-dimming light source module in the description are only described using the light emitted by a single light-emitting unit 141 .

The self-dimming light source module 100 provided in one embodiment of the present invention can be used with any of the optical films described in the above embodiments of the present invention. For example, the self-dimming light source module 100 shown in FIG. 7 is matched with the optical film 10 having the light-transmitting substrate 11 and the color conversion layer 12 shown in FIG. 1 , and the self-dimming light source shown in FIG. 8 The module 100A is equipped with the optical film 10A having the light-transmitting substrate 11, the color conversion layer 12 and the microstructure layer 13 as shown in Figure 2. It can also be equipped with the optical films 10B and 10C (not shown), as shown in Figure 9 The self-dimming light source module 100B shown in FIG. 5 is matched with the optical film 10D having the light-transmitting substrate 11 and the microstructure color conversion layer 12A shown in FIG. 5, or the self-dimming light source module shown in FIG. 10 100C is paired with the optical film 10E having the patterned color conversion layer 12B and the light-transmitting substrate 11 shown in FIG. 6 .

In a self-dimming light source module according to an embodiment of the present invention, as shown in FIG. 11 , the self-dimming light source module 100D includes a light source component 14 and a color conversion layer 12 . The light source component 14 has a plurality of light-emitting units 141 , the color conversion layer 12 is disposed on the light-emitting side 142 of the light source component 14 and covers the plurality of light-emitting units 141. The material and properties of the color conversion layer 12 are as described in the previous embodiments and will not be described again here. The color conversion layer 12 has an initial color in an initial state, and absorbs energy from the light-emitting unit 141 to generate a reaction block Z showing a modulated color, where the modulated color is darker than the initial color. The light emitted by the light-emitting unit 141 passes through the reaction block Z formed in the color conversion layer 12, adjusts the amount of light, and then outputs light L6. The self-adjusting light source module 100D of the embodiment of the present invention eliminates the need for the light-transmitting base material 11 , and disposes the color conversion layer 12 directly on the light source component 14 , filling the space between the plurality of light-emitting units 141 and covering it. The light-emitting unit 141 isolates the light-emitting unit 141 from the air and saves the installation of light-transmitting units. The cost of the base material 11 is reduced, and the thickness of the overall self-dimming light source module 100D is reduced. The color conversion layer 12 may also be the microstructure color conversion layer 12A or the patterned color conversion layer 12B in the aforementioned optical film embodiment.

According to the above, the optical film of the embodiment of the present invention adjusts the brightness of the incident light through a color conversion layer that changes color after absorbing energy. The color conversion layer generates a reaction block after absorbing energy in the initial color of the initial state. The reaction block appears as Modify the color, where the modulated color is darker than the original color. When incident light passes through the reaction block, the energy is absorbed by the materials in the reaction block and the color brightness of the reaction block is low, causing the light transmission of the optical film here to decrease, resulting in an output light with a lower brightness than the incident light. , whereby the optical diaphragm can automatically adjust the brightness of the output light according to the brightness and energy of the incident light.

Furthermore, the optical film of the present invention can be provided with a microstructure layer. The geometric structure of the microstructure layer and optical properties such as material refractive index and reflectivity can change the light shape of the incident light. Therefore, the designed microstructure layer can Make light output in a specific light shape.

In addition, the self-adjusting light source module of the embodiment of the present invention uses an optical film or color conversion layer with a color conversion layer. The optical film or color conversion layer can automatically adjust the color according to the amount of energy received. The degree of discoloration of the conversion layer is used to adjust the light transmission of the optical film, thereby adjusting the light output of the light source component, so that the optical film or color conversion layer directly aligned with the light source has a lower light transmission, while the light source energy is indirectly received obliquely. The optical film or color conversion layer has a higher light transmittance, thereby enabling the overall self-dimming light source module to have a more uniform light distribution. In addition, since the optical film or color conversion layer with the color conversion layer is used in a self-dimming light source module, it does not require high-precision alignment with the light-emitting unit on the light source component, so the assembly process of the light source module can be simplified and Reduce working hours.

Although the present invention has been disclosed above through embodiments, they are not intended to limit the invention. Those with ordinary skill in the technical field to which the present invention belongs can, without departing from the spirit and scope of the present invention, Slight changes and embellishments may be made, so the scope of protection of the present invention shall be determined by the appended patent application scope.

10A: Optical film 11: Transparent substrate 111: First side 112:Second side 12: Color conversion layer 13:Microstructure layer 131:Microstructural unit 131A:Structure 1311: Tip 1312: Side end Z: reaction block D1: first direction D2: second direction L1, L1’: incident light L2, L2’: output light

Claims (13)

An optical film includes a light-transmissive base material, including an opposite first side and a second side; a microstructure layer disposed on the first side of the light-transmissive base material to adjust the light shape of an incident light ; And a color conversion layer, disposed on the second side of the light-transmissive base material, or between the light-transmissive base material and the microstructure layer, or on a side of the microstructure layer away from the light-transmissive base material; On the other hand, the color conversion layer has an initial color, and by absorbing an energy, at least a portion of the color conversion layer is converted from the initial color to a modulated color, wherein the color conversion layer produces color change via the energy of the incident light. React and form at least one reaction block, and the at least one reaction block exhibits the modulated color, wherein the light shape of the incident light or the reflected part of the incident light is adjusted through the microstructure layer, so that the at least one reaction block This modulation of color creates a difference in the degree of discoloration. The optical film of claim 1, wherein the microstructure layer contains a plurality of gaps, and when the color conversion layer is disposed on the side of the microstructure layer away from the light-transmitting substrate, the color conversion layer is more filled The gaps. The optical film according to claim 1, wherein the haze of the light-transmitting substrate is between 0.1 and 99%. The optical film of claim 1, wherein the color conversion layer includes a light-sensitive organic material, the energy comes from the incident light, and the wavelength of the incident light is between 400 nm and 480 nm. The optical film of claim 1, wherein the color conversion layer includes a temperature-sensitive organic material, the energy comes from an environmental heat source, and the temperature of the environmental heat source is between 30°C and 90°C. The optical film of claim 1, wherein the microstructure layer includes a plurality of microstructure units, and the characteristic sizes of the microstructure units are between 2 μm and 60 μm. The optical film according to claim 6, wherein the microstructural units are at least one of hemispherical and hemispherical or a combination thereof. The optical film according to claim 6, wherein the microstructural units are made of highly transparent polymeric organic materials, and the average refractive index of the microstructural units is between 1.4 and 1.65. An optical film includes a light-transmitting base material; and a color conversion layer disposed on the light-transmitting base material. The color conversion layer includes a plurality of microstructure color conversion units to adjust the light shape of an incident light. The color conversion layer The layer has an initial color, and by absorbing an energy, at least a portion of the color conversion layer is converted from the initial color to a modulated color. The optical film according to claim 9, wherein the characteristic size of the microstructure color conversion units is between 2 μm and 60 μm. The optical film according to claim 9, wherein the microstructure color conversion units are at least one of hemispherical and hemispherical or a combination thereof. The optical film according to claim 9, wherein the microstructure color conversion units include light-sensitive organic materials, temperature-sensitive organic materials or combinations thereof. The optical film according to claim 9, wherein the average refractive index of the microstructure color conversion units is between 1.4 and 1.65.

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