CN1869768A - Microstructure optical modulation assembly and device - Google Patents

Abstract

A microstructure optical modulation component is provided with a first optical surface and a second optical surface capable of receiving an incident light, and comprises a diffusion part and a light collecting part; the diffusion part is made of light-permeable material and can diffuse the incident light, the diffusion part is formed on the first optical surface, the light collection part is made of light-permeable material and can collect the incident light, and the light collection part is formed on the diffusion part.

Description

Microstructured Optical Modulation Components and Devices

technical field

The present invention relates to a microstructured optical modulation component and a microstructured optical modulation device, in particular to a microstructured optical modulation component in which a diffusion Components of microstructured optical modulation devices.

Background technique

In the current backlight module, optical films such as diffusion film, brightness enhancement film or polarization conversion film are mainly used together to achieve the purpose of uniformity and concentration of light. However, the sources of relevant components are currently controlled by foreign manufacturers. Although Taiwan’s display industry is booming, the key components of the backlight module industry have long been controlled by foreign manufacturers, resulting in low profits. In addition, the above-mentioned backlight module architecture uses a large number of diaphragms, which relatively results in lower module optical efficiency and higher module costs. Disadvantages such as limited assembly yield.

Please refer to Figure 1. US Patent No. US6,091,547 "Luminance Control Film (Luminance Control Film)" uses two pieces of diamond-shaped structures 10 and 12 to achieve the effect of controlling and guiding light, so that the light is concentrated and increased. The brightness of forward light; although this structure can effectively concentrate light, it cannot achieve the purpose of diffusion.

Please refer to FIG. 2 again. Japanese Patent No. JP2001324608 "Light-Diffusing Sheet (Light-Diffusing Sheet)" discloses that resin particles 22 of different particle sizes are distributed on a transparent substrate 20 and fixed with adhesive resin 24, so that light passes through the transparent sheet. After the substrate 20, random scattering will be generated to achieve the purpose of light diffusion; however, the addition of these tiny particles will reduce the light use efficiency of the diffusion sheet, and it is only used for diffusion, so the purpose of concentration cannot be achieved.

Contents of the invention

In order to overcome the deficiencies in the prior art, the main purpose of the present invention is to provide a microstructured optical modulation component and a microstructured optical modulation device, which use microstructures to achieve a composite optical effect of light collection and diffusion, to achieve The purpose of effectively improving light efficiency.

The secondary purpose of the present invention is to provide a microstructured optical modulation component and a microstructured optical modulation device, which reduce the production cost through the production of microstructured rollers and one-time forming by rolling.

The technical solution adopted by the present invention is a microstructured optical modulation component, comprising a first optical surface and a second optical surface capable of receiving an incident light, and the microstructured optical modulation component includes:

a diffusion part is made of light-transmitting material and can diffuse the incident light, the diffusion part is formed on the first optical surface; and

A light collecting part is made of light-permeable material and can concentrate the incident light, and the light collecting part is formed on the diffusing part.

The diffusion part includes a semi-cylindrical unit structure.

The semi-cylindrical unit structure has at least half the depth of the cylindrical unit structure.

The depth of the semi-cylindrical unit structure is in the range of 5 microns to 500 microns.

The light collecting part includes a rhombus unit structure.

The rhombus unit structure is provided with a vertex angle and a height.

The apex angle is in the range of 30 degrees to 140 degrees.

Said height is in the range greater than 0 microns and not greater than 500 microns.

The second optical surface is a smooth optical surface.

The second optical surface is a rough optical surface.

A layer of ultraviolet forming material is coated on the plastic substrate, and then rolled and formed by a microstructure mold core, and then cured by ultraviolet light irradiation.

The semi-cylindrical unit structure has multiple rhombus unit structures.

The technical solution adopted in the present invention also includes a microstructure optical modulation device, comprising:

a reflector;

A light guide plate is located on the reflection sheet;

at least one light source is located around the light guide plate and can emit an incident light; and

At least one microstructured optical modulation component is located on the light guide plate with a first optical surface and a second optical surface capable of receiving the incident light, and the at least one microstructured optical modulation component includes:

a diffusion part is made of light-transmitting material and can diffuse the incident light, the diffusion part is formed on the first optical surface; and

A light collecting part is made of light-permeable material and can concentrate the incident light, and the light collecting part is formed on the diffusing part.

The diffusion part includes a half-cylindrical unit structure, and the semi-cylindrical unit structure has at least half the depth of the cylindrical unit structure.

The light collecting part includes at least one rhombus unit with a vertex angle and a height.

The second optical surface is a smooth optical surface.

The second optical surface is a rough optical surface.

It includes two microstructured optical modulation components, and the microstructured optical modulation components overlap each other and form an intersection angle less than 90 degrees.

The second optical surface is a rough surface integrally formed with the substrate.

The second optical surface is for coating a layer of rough surface on the substrate.

The advantages of the present invention are: using the microstructure to achieve the composite optical effect of light collection and diffusion, which can effectively improve the light efficiency; through the production of the microstructure roller and one-time forming by rolling, the production cost can be effectively reduced.

Description of drawings

Fig. 1 is a schematic diagram of a prior art;

Fig. 2 is the schematic diagram of another prior art;

3A is a schematic diagram of the optical properties of a rhombic lens;

Fig. 3B is a schematic diagram of the optical characteristics of the lenticular lens;

4 is a schematic cross-sectional view of the microstructured optical modulation component of the present invention;

5 is a schematic diagram of the processing of the microstructured optical modulation component of the present invention;

Fig. 6 is a schematic diagram of a variation embodiment of the microstructured optical modulation component of the present invention;

7 is a schematic cross-sectional view of the microstructured optical modulation component of the present invention applied to a microstructured optical modulation device;

8 is a schematic cross-sectional view of another embodiment of the microstructured optical modulation component of the present invention when applied to a microstructured optical modulation device;

FIG. 9 is a schematic stack diagram of the microstructured optical modulation component of the present invention applied to a microstructured optical modulation device;

Fig. 10 is a schematic cross-sectional view of another embodiment of the microstructured optical modulation component of the present invention;

Fig. 11 is a schematic cross-sectional view of yet another embodiment of the microstructured optical modulation component of the present invention.

Explanation of reference numerals: 10 rhombus structure; 12 rhombus structure; 22 resin particles; 24 adhesive resin; 30 rhombus; 32 incident light; 34 lens; 36a-incident light; light; 38 converging area; 40 microstructure optical modulation component; 42 first optical surface; 44 second optical surface; 440 particles; 46 diamond-shaped unit; 48 semi-cylindrical unit; 50 plastic substrate; Kernel; 56 drum; 60 smallest unit; 7 microstructure optical modulation device; 70 light source; 72 reflector; 74 light guide plate; 76 microstructure optical modulation component; 700 incident light; 8 microstructure optical modulation device; 84 light guide plate; 86 microstructure optical modulation components; 88 microstructure optical modulation components; 800 incident light; a-vertex angle; b-semi-cylindrical unit structure depth; h-height;

Detailed ways

The following will describe the technical means and effects used by the present invention to achieve the purpose with reference to the accompanying drawings, and the embodiments listed in the following drawings are only for auxiliary illustration, but the technical means of this case are not limited to the listed drawings.

Please refer to Fig. 3A, rhombic structure has good light-gathering characteristic on optical effect (reduce the divergence angle of divergent light source); Total reflection critical angle, then incident light 32 can be totally reflected in this prism 30 (dotted line arrow in Fig. 3A), if angle θ is less than total reflection critical angle, then incident light 32 is after emitting this prism 30 (Fig. 3A The arrow in the solid line) will deviate from the normal again (the dotted line in FIG. 3A ), thus achieving the light-collecting effect.

In addition, the lenticular mirror structure can exhibit the diffusion properties in the effective range due to the lens characteristics in terms of optical effect. As shown in FIG. After entering the lens 34, they will first converge in the converging area 38 and then diverge; this characteristic can be used to achieve the purpose of converging and homogenizing (blurring) the exit angle of the light with a large incident angle.

The microstructured optical modulation component proposed in this patent has the composite effect of diffusing and collecting light on the light source. The surface of the microstructured optical modulation component is mainly composed of microstructures with the above two geometric features, which means that it consists of a rhombus structure and a semi-cylindrical structure. composed of structures. Therefore, through the stack combination of these two structures, the dual effects of light collection and diffusion can be produced on the light source.

Please refer to FIG. 4 , which is a cross-sectional view of the microstructured optical modulation component of the present invention. The microstructured optical modulation component 40 of the present invention has a first optical surface 42 and a second optical surface 44, the second optical surface 44 is used to receive incident light (not shown in the figure), the first optical surface 42 is formed with a semi-cylindrical unit 48, and a diamond-shaped unit 46 is formed on the semi-cylindrical unit 48. The rhombus unit 46 is used to concentrate light, which means a light-collecting part, and the semi-cylindrical unit 48 is used for Diffuse light, which means the diffuser, the rhombus unit 46 has a vertex a and a height h, the semi-cylindrical unit 48 has a half-cylindrical unit structure depth b, by properly selecting the vertex a, the semi-cylindrical The unit structure depth b, the height h and the constituent materials of the microstructured optical modulation component 40 (that is, the selected refractive index), we can adjust the etendue and The strength ratio of the spread.

Fig. 5 is a schematic diagram of the processing of the microstructured optical modulation component of the present invention. When it is desired to make the microstructured optical modulation component of the present invention, a layer of ultraviolet forming material 52 is first coated on the plastic substrate 50, and then the ultraviolet forming material 52 is rolled over by a roller 56 equipped with a microstructure mold core 54 That is, a desired pattern can be formed on the ultraviolet forming material 52, and then the ultraviolet forming material 52 is irradiated with ultraviolet light (not shown in the figure) to be cured, and the microstructure optical modulation component of the present invention can be obtained.

Of course, the microstructured optical modulation component of the present invention is not limited to a rhombus unit on top of a semi-cylindrical unit, but can also have various collocation changes. As shown in Figure 6, the smallest unit 60 of the microstructured optical modulation component of the present invention can also be equipped with four diamond-shaped units on a semi-cylindrical unit; these changes are completely set according to the actual needs of the user. This will not be repeated here.

FIG. 7 is a schematic cross-sectional view of the microstructured optical modulation component of the present invention applied to a microstructured optical modulation device. In Fig. 7, the microstructured optical modulation device 7 includes a light source 70, a reflector 72, a light guide plate 74, and a microstructured optical modulation component 76; the light source 70 is located around the light guide plate 74 and can emit a For the incident light 700, the light guide plate 74 is located on the reflection sheet 72, and the microstructured optical modulation component 76 is located on the light guide plate 74; thus, the incident light 700 can be transmitted in a single direction (horizontal or vertical). The dual effects of concentration and diffusion by the microstructured optical modulation component 76 (for example, to improve the horizontal visibility or vertical visibility of the display) make the microstructured optical modulation device 7 improve light efficiency and have excellent display characteristics .

8 is a schematic cross-sectional view of the microstructured optical modulation component of the present invention applied to a microstructured optical modulation device, which shows another embodiment. In FIG. 8, the microstructured optical modulation device 8 includes a light source 80, a reflector 82, a light guide plate 84, and two microstructured optical modulation components 86 and 88; the light source 80 is located around the light guide plate 84 and An incident light 800 can be emitted, the light guide plate 84 is located on the reflection sheet 82, the microstructure optical modulation components 86 and 88 are located on the light guide plate 84, and the microstructure optical modulation components 86 and the microstructure The structural optical modulation components 88 can form a special included angle α in addition to overlapping each other, as shown in FIG. The double effect of diffusion (for example, to improve the horizontal visibility and vertical visibility of the display at the same time), makes the microstructured optical modulation device 8 improve light efficiency and have excellent display characteristics.

In the present invention, the semi-cylindrical unit structure depth of the semi-cylindrical unit is in the range of 5 microns to 500 microns, the apex angle of the rhombus unit is in the range of 30 degrees to 140 degrees, and the height of the rhombus unit is in the range of greater than 0 microns and not greater than 500 microns; the second optical surface can be a smooth or rough optical surface (in order to make the diffusion effect better), when the second optical surface 44 is intended to be made as a rough surface, Particles 440 of different particle sizes can be coated on the microstructured optical modulation component 40 or integrally formed when manufacturing the microstructured optical modulation component 40, as shown in Figures 10 and 11; when stacking two microstructures In the case of optical modulation components, the microstructured optical modulation components can form a special included angle greater than 0 degrees but not greater than 90 degrees with each other.

From the above, it can be seen that the composite functional microstructure optical modulation component proposed in this patent has a composite effect of diffusing and collecting light on the light source, and can exhibit a highly controllable optical diffusion function, so as to replace the traditional light collecting sheet and diffusing sheet at the same time. The purpose of this kind of microstructure optical modulation component is to improve the light efficiency, simplify the module structure and reduce the module cost when it is applied in the backlight module, and it is a very competitive product in this technical field.

What is described above is only a preferred embodiment of the present invention, and should not limit the implementation scope of the present invention. That is, all equivalent changes and modifications made according to the scope of the patent application of the present invention should still fall within the scope covered by the patent of the present invention.

Claims (20)

1. A microstructured optical modulation component, characterized in that it includes a first optical surface and a second optical surface capable of receiving an incident light, and the microstructured optical modulation component includes: a diffusion part is made of light-transmitting material and can diffuse the incident light, the diffusion part is formed on the first optical surface; and A light collecting part is made of light-permeable material and can concentrate the incident light, and the light collecting part is formed on the diffusing part. 2. The microstructured optical modulation component according to claim 1, wherein the diffusion part comprises a half-cylindrical unit structure. 3. The microstructured optical modulation component according to claim 2, wherein the semi-cylindrical unit structure has at least half the depth of the cylindrical unit structure. 4. The microstructured optical modulation component according to claim 3, wherein the depth of the semi-cylindrical unit structure is in the range of 5 microns to 500 microns. 5. The microstructured optical modulation component according to claim 1, wherein the light collecting part comprises a diamond-shaped unit structure. 6. The microstructured optical modulation component according to claim 5, wherein the rhombus unit structure is provided with a vertex angle and a height. 7. The microstructured optical modulation component according to claim 6, wherein the apex angle is in the range of 30 degrees to 140 degrees. 8. The microstructured optical modulation component according to claim 6, characterized in that: said height is in the range of greater than 0 microns and not greater than 500 microns. 9. The microstructured optical modulation component according to claim 1, wherein the second optical surface is a smooth optical surface. 10. The microstructured optical modulation component according to claim 1, wherein the second optical surface is a rough optical surface. 11. The microstructured optical modulation component according to claim 1, characterized in that: a layer of ultraviolet forming material is coated on the plastic substrate, and then rolled and formed by the microstructure mold core, and then cured by ultraviolet light irradiation. 12. The microstructured optical modulation component according to claim 1, wherein the semi-cylindrical unit structure has a plurality of diamond-shaped unit structures. 13. A microstructured optical modulation device, characterized in that it comprises: a reflector; A light guide plate is located on the reflection sheet; at least one light source is located around the light guide plate and can emit an incident light; and At least one microstructured optical modulation component is located on the light guide plate with a first optical surface and a second optical surface capable of receiving the incident light, and the at least one microstructured optical modulation component includes: a diffusion part is made of light-transmitting material and can diffuse the incident light, the diffusion part is formed on the first optical surface; and A light collecting part is made of light-permeable material and can concentrate the incident light, and the light collecting part is formed on the diffusing part. 14. The microstructured optical modulation device according to claim 13, wherein the diffusion part comprises a half-cylindrical unit structure, and the semi-cylindrical unit structure has at least half the depth of the cylindrical unit structure. 15 . The microstructured optical modulation component according to claim 13 , wherein the light collecting part comprises at least one diamond-shaped unit with a vertex angle and a height. 16. The microstructured optical modulation device according to claim 13, wherein the second optical surface is a smooth optical surface. 17. The microstructured optical modulation device according to claim 13, wherein the second optical surface is a rough optical surface. 18. The microstructured optical modulation device according to claim 13, characterized in that it comprises two microstructured optical modulation components, and the microstructured optical modulation components overlap each other and form an intersection angle less than 90 degrees. 19. The microstructured optical modulation device according to claim 17, wherein the second optical surface is a rough surface formed integrally with the substrate. 20. The microstructured optical modulation device according to claim 17, wherein the second optical surface is a rough surface coated on the substrate.

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