KR100886830B1 - Brightness Enhancement Film for Diffusion and Directing Light - Google Patents

Abstract

SUMMARY OF THE INVENTION An object of the present invention is to form a plurality of curved prism units on one surface of a substrate, and to mix the plurality of diffuse particles with the curved prism units, thereby effectively scattering the incident light rays, increasing the transmittance of the primary light rays, and You can reduce total light consumption by preventing total reflection.

The substrate 11 is formed with a first surface 11a and a second surface 11b. The curved prism unit 12 is arranged on the first surface 11a of the substrate 11, and the diffusing particles 13 are mixed in at least the curved prism unit 12 to simultaneously receive light incident from the second surface 11b. At least one curved stretched curved surface is formed in the curved prism unit 12 so that the surface curvature can be appropriately changed, and the light can be guided to generate at least two-dimensional refraction, and again the curved prism It is comprised so that it may exit | emit from the unit 12.

Curved Prism Unit, Surface Curvature, Primary Ray Transmittance, Light Consumption

Description

Brightness Enhancement Film for Diffusion and Directing Light

1 is a perspective view of a composite luminance-enhanced film having diffusion particles of Example 1 according to the present invention.

FIG. 2 is a local perspective side view of the composite luminance enhancing film having diffuser particles of Example 1 according to the present invention. FIG.

FIG. 2A is a local perspective side view of the composite luminance enhancing film with diffuser particles of Example 2 in accordance with the present invention. FIG.

3 is an explanatory view of a composite luminance-enhanced film having diffusion particles of Example 1 according to the present invention.

Figure 4 is a curve diagram of the transmittance and reflectance of the primary ray by the composite luminance-enhanced film having a diffusion particle of Example 1 according to the present invention.

FIG. 5 shows the primary light transmittance of the composite luminance-enhanced film (bending prism unit containing diffusion particles) and the conventional luminance-enhanced film (bending prism unit not including diffusion particles) of Example 1 according to the present invention. It is a curve comparison of.

Figure 6 is a comparison of the luminance value of the horizontal time in the state where two composite brightness-enhanced film having a diffusion particle of Example 1 according to the present invention and a brightness-enhancing film that does not include the conventional diffusion particles.

7 is a comparison of the luminance value of the vertical time in the state where two composite brightness-enhancing films having diffusion particles of Example 1 according to the present invention and two brightness-enhancing films not including conventional diffusion particles are stacked.

Figure 8 is a comparison of the luminance value of the horizontal time in the state using a composite brightness film having a diffusion particle of Example 1 according to the present invention and a brightness enhancement film not containing conventional diffusion particles alone.

Figure 9 is a comparison of the luminance value of the vertical time in the state using a composite brightness film having a diffusion particle of Example 1 according to the present invention and a brightness enhancement film not containing conventional diffusion particles alone.

10 is a view of a conventional brightness enhancement film.

11 is an explanatory view of a conventional brightness enhancement film.

FIG. 12 is a 500 times micrograph of a composite luminance-enhanced film having diffusion particles of Example 1 according to the present invention. FIG.

<Description of the symbols for the main parts of the drawings>

1 Brightness film 11 base

11a first surface 11b second surface

12 Curved Prism Unit 12a First Slope

12b 2nd slope 121 station

13 diffuse particles 14 rays

15 rays 9 brightness enhancement film

91 Description 92 Prism Unit

93 rays 94 rays

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite luminance enhancing film having diffusion particles, and more particularly to a luminance enhancement film used in liquid crystal displays, wherein a plurality of curved prism units are formed on one surface, and a plurality of diffusion particles are formed. By mixing, the present invention relates to a composite luminance enhancing film capable of providing a dual effect by diffusion and condensing.

As a conventional brightness enhancement film, as shown in FIGS. 10 and 11, the brightness enhancement film 9 includes a substrate 91 and a plurality of prism units 92, and the prism unit 92 is a substrate 91. Is arranged to be parallel to the first surface of the. The prism unit 92 is composed of two inclined surfaces, and the prism unit 92 may be configured to refract light rays and cause a phenomenon of condensing.

In addition, as a conventional diffusion film, "OPTICAL FILM FOR BACKLIGHT UNIT AND BACKLIGHT UNIT USING THE SAME" of PCT patent application 2005/006030 contains a base material, a reflection pattern, and some diffuse particle | grains. A reflection pattern is formed on the surface of the substrate, and the substrate can refract the light beam to focus it. The said diffused particle may be formed so that light may have a spreading effect by being scattered in the said reflection pattern and each site | part in a base material (for example, refer patent document 1).

In addition, as a conventional diffusion film, the "light diffusion film" of Unexamined-Japanese-Patent No. 09-304607 contains a base material and a light-diffusion layer. A light diffusion layer may be formed on the surface of the substrate, and the substrate may collect light by refracting light rays. The light diffusing layer is composed of one transparent resin and a plurality of fine particles, and the fine particles are dispersed in the transparent resin, and further, a fine uneven surface is formed on the surface of the light diffusing layer, thereby providing a light diffusing effect. There exists (for example, refer patent document 2).

In addition, as a conventional diffusion film, "DIFFUSED LIGHT CONTROLLING OPTICAL SHEET, BACKLIGHT DEVICE AND LIQUID CRYSTAL DISPLAY APPARATUS" of U.S. Patent No. 6,417,831 includes a substrate, a plurality of protrusions, and a plurality of fine materials. The protrusion may be formed on a surface of the substrate, and the substrate may collect light by refracting light rays. A fine material is scattered in the said protrusion part, and the surface of the said protrusion part has the uneven | corrugated surface formed, and the thing formed so that the light-ray diffusion effect may be provided (for example, refer patent document 3).

Moreover, as a conventional diffusion film, "OPTICAL DIFFUSION PLATE APPLIED FOR DIRECT-TYPE BACKLIGHT MODULE AND MANUFACTURING METHOD THEREOF" of US Patent Publication No. 2005/0257363 contains a base material, a tooth structure layer, and an optical diffusing agent. A tooth structure layer is formed on the surface of the substrate, and the substrate may collect light by refracting light rays. In the base material and the tooth structure layer, the optical diffusing agent is mixed at the same time so as to provide a diffusing effect of light rays (for example, refer to Patent Document 4).

In addition, as a conventional brightness enhancement film, the "backlight module employing a brightness enhancement film and a brightness enhancement film" of Republic of China Patent Publication No. M277950 includes a substrate, a plurality of rod-shaped prisms, and a plurality of scattering particles. The rod-shaped prism is formed on a surface of the substrate, and the substrate may be configured to refract light rays. The said scattering particle is mixed in the said base material, and what was formed so that the diffusion effect of a light beam may be provided (for example, refer patent document 5).

In addition, as a conventional brightness enhancement film, "BRIGHTNESS ENHANCEMENT FILM HAVING CURVED PRISM UNITS" of US Patent Publication No. 2005/0237641, filed previously by the applicant of the present invention, includes a substrate and a plurality of curved prism units. A curved prism unit is formed on a surface of the substrate, and at least one curved stretched curved surface is formed on each of the curved prism units, and the substrate may change curvature so that light may be refracted to condense in two dimensions. There are some (for example, refer patent document 6).

[Patent Document 1] PCT Patent Application No. 2005/006030

[Patent Document 2] Japanese Patent Application Laid-open No. 09-304607

[Patent Document 3] US Patent Publication No. 6,417,831

[Patent Document 4] US Patent Publication No. 2005/0257363

[Patent Document 5] Republic of China Patent Publication No. M277950

[Patent Document 6] US Patent Publication No. 2005/0237641

In the conventional luminance-enhanced film as described above, for example, when the light ray 93 enters the substrate 91 at a relatively large incident angle with respect to the second surface of the substrate 91 (that is, the light ray 93 is a substrate). The light rays 93 can be smoothly refracted and exit from the prism unit 92 of the second surface of the substrate 91 so as not to be relatively perpendicular to the second surface of the 91. However, when light ray 94 enters substrate 91 at a relatively small angle of incidence (less than 6 ° to 9 °) with respect to the second surface of substrate 91 (i.e., light ray 94 is exposed to substrate 91). Light beam 94 cannot be refracted and exit from prism unit 92, but rather exit from the second surface of substrate 91 again by total reflection. There was a problem of decreasing the primary transmittance of 94 and increasing the consumption of light.

In the conventional luminance-enhanced films published in Patent Documents 1 to 5, the diffusion particles are mixed in the base material and / or the refractive-pattern layer, and the refractive-index layer is not improved. There is a problem that the refractive pattern does not have a curved structure.

In addition, in the case of the conventional brightness enhancement film disclosed in Patent Document 6 as described above, the brightness enhancement film is further improved so as to obtain a light converging effect of relatively good refraction compared to Patent Documents 1 to 5. In addition, the present invention is to improve the problems of the conventional brightness enhancement film based on the curved prism unit previously filed by the applicant of the present invention.

The present invention has been invented in view of the above problems, and an object thereof is to form a plurality of curved prism units on one surface of the substrate, and use the curved prism units to appropriately change the surface curvature, By mixing a plurality of diffused particles, it is possible to provide a dual effect by two-dimensional condensing and uniform diffusion, and by reducing the probability of total reflection due to the incident light of a small angle, it is possible to effectively increase the transmittance of the primary rays, It is to provide a composite luminance-enhanced film having a diffusion particle that can lower the consumption rate of light.

A first object of the present invention is to form a plurality of curved prism units on one surface of a substrate, and to mix the plurality of diffuse particles with the curved prism units to effectively scatter incident light, thereby increasing the transmittance of the primary ray It is to provide a composite brightness-enhancing film having diffused particles that can prevent the total reflection of the light beam to further reduce the consumption of light.

A second object of the present invention is to form a plurality of curved prism units on one surface of a substrate, to mix a plurality of diffuse particles in the curved prism unit, to control the exit angle of the incident light beams and to concentrate the scattered light beams that have already been diffused. The present invention provides a composite luminance-enhanced film having diffused particles capable of increasing the luminance of the luminance-enhanced film.

The third object of the present invention is to form a plurality of curved prism units on one surface of the substrate, to mix the plurality of diffusion particles in the curved prism unit, and to uniformly scatter incident light rays, thereby improving the uniformity of the light source. In another aspect, the present invention provides a composite luminance-enhanced film having diffusing particles capable of controlling a light source.

The fourth object of the present invention is to form a plurality of curved prism units on one surface of the substrate, to mix the plurality of diffusion particles in the curved prism unit, and to scatter the incident light rays until they are uniformly distributed, thereby achieving uniform luminance. The present invention provides a composite brightness-enhancing film having diffused particles that increase the properties, increase the horizontal and vertical semi-brightness angles, and increase the visual angle and the brightness value of the dash angle.

A fifth object of the present invention is to increase luminance by forming a plurality of curved prism units on one surface of a substrate, mixing a plurality of diffused particles in the curved prism unit, scattering incident light rays, and obtaining a relatively high mist concentration. It is to provide a composite luminance-enhanced film having diffused particles that can control the structural defects of the film to increase the yield of the product and lower the manufacturing cost.

A sixth object of the present invention is to provide a diffusion film by realigning the diffusion film by forming a plurality of curved prism units on one surface of the substrate, mixing the plurality of diffusion particles in the curved prism unit, and scattering incident light uniformly. It is possible to provide a composite brightness-enhancing film with diffused particles that can simplify assembly of backlight and lower assembly costs.

Composite luminance-enhanced film having a diffusion particle according to the present invention for achieving the above object is made as follows.

That is, it consists of a base material, a some curved prism unit, and a some diffuse particle. The substrate is formed with a first surface and a second surface. At least one curved stretched curved surface is formed in the plurality of curved prism units, thereby guiding light rays incident from the second surface to generate at least two-dimensional refraction. In addition, the plurality of diffusing particles are mixed at least in the curved prism unit so that the light rays incident from the second surface are simultaneously diffused and again formed to exit from the curved prism unit.

In the composite luminance-enhanced film having diffusion particles according to the present invention, the mixing weight ratio of the diffusion particles to the curved prism unit may be 1% to 35%. In addition, the diffusion particles may be selected from acrylic materials and glassy materials. The glassy material may be selected from silicon dioxide, dialuminum trioxide, boron oxide, calcium oxide, magnesium oxide, silicone resin, polyester resin and styrene resin. In addition, the average particle diameter of the diffusion particles may be 0.5 micron to 30 microns. The shape of the diffuser particles may be selected from round, oblong, oval, olive, egg and irregular polyhedrons. In addition, at least one curved stretched curved surface of the curved prism unit may be formed to have a plurality of side portions. The curved prism unit may include a first inclined plane and a second inclined plane, and at least one of the first inclined plane and the second inclined plane may be a curved stretched curved plane. In addition, the first inclined surface and the second inclined surface of the curved prism unit may be formed to have a plurality of interlocking portions selectively interlaced. In addition, the angle between the first inclined surface and the second inclined surface of each curved prism unit may be 70 ° to 160 °. Each two adjacent curved prism units may vary in surface curvature along a curved path of the same rule. In addition, the surface curvature of each two adjacent curved prism units may change along the curved path of a different rule. In addition, the curved prism unit may be formed to have substantially the same vertical height with respect to the substrate. In addition, the vertical height of the curved prism unit may be between 10 microns and 100 microns. The horizontal width of the curved prism unit can be 10 microns to 250 microns. The curved prism unit may be bonded to the first surface 11a of the substrate 11 with an ultraviolet curing adhesive. In addition, a base material can also be selected from a flexible transparent base material. The flexible transparent substrate can be selected from polyethylene terephthalate, polyethylene, polyethylene naphthalate, polycarbonate, polyvinyl alcohol, polyvinyl chloride and a high molecular compound. In addition, the plurality of diffusing particles may simultaneously diffuse light rays incident on the second surface and exit from the curved prism unit, thereby increasing the primary ray transmittance of the incident rays from 10% to 90%.

According to the composite luminance-enhanced film having the diffusing particles of the present invention, the primary light ray is formed by forming a plurality of curved prism units on one surface of the substrate, mixing the plurality of diffuse particles in the curved prism unit, and effectively scattering incident light rays. There is an advantage that can increase the transmittance of and prevent the total reflection of the light beam to further reduce the consumption rate of light.

According to the composite luminance-enhanced film having diffused particles of the present invention, a plurality of curved prism units are formed on one surface of the substrate, and the plurality of diffused particles are mixed in the curved prism unit to control the emission angle of the incident light beam, By condensing the scattered light rays already diffused, there is an advantage that the luminance of the luminance-enhanced film can be increased.

According to the composite luminance-enhanced film having the diffusing particles of the present invention, a plurality of curved prism units are formed on one surface of the substrate, and a plurality of diffuse particles are mixed in the curved prism unit to uniformly scatter incident light rays, thereby There is an advantage that can improve the uniformity of and further control the light source.

According to the composite luminance-enhanced film having the diffusing particles of the present invention, a plurality of curved prism units are formed on one surface of the substrate, and a plurality of diffuse particles are mixed in the curved prism unit, until the incident light rays are uniformly distributed. By scattering, there is an advantage that the uniformity of the luminance is increased, the half-luminance angles of horizontal and vertical are increased, the time is increased, and further, the luminance value of the dash angle is increased.

According to the composite luminance-enhanced film having diffused particles of the present invention, a plurality of curved prism units are formed on one surface of a substrate, and a plurality of diffused particles are mixed in the curved prism unit to scatter incident light rays and have a relatively high mist concentration. By obtaining the, it is advantageous to control the structural defects of the luminance-enhanced film and increase the yield of the product to further lower the manufacturing cost.

According to the composite luminance-enhanced film having diffusing particles of the present invention, a plurality of curved prism units are formed on one surface of a substrate, and a plurality of diffuse particles are mixed in the curved prism unit to uniformly scatter incident light rays, thereby diffusing them. Since the film does not need to be refitted, there is an advantage that the module of the backlight can be simplified and the assembly cost can be lowered.

Best Mode for Carrying Out the Invention

Embodiments of the present invention will be described below with reference to the drawings.

Example 1

1 and 2, the composite luminance-enhanced film 1 having diffused particles of Example 1 of the present invention includes a substrate 11, a plurality of curved prism units 12, and a plurality of diffused particles 13. do. The substrate 11 is provided with a first surface 11a and a second surface 11b, and the substrate 11 is used to penetrate and transmit light rays. The first surface 11a of the substrate 11 is preferably the light emitting side of the substrate 11, and the second surface 11b is preferably the light incident side of the substrate 11, but vice versa. It may be. The curved prism unit 12 consists of a unit of microstructure having a curved contour, the curved prism unit 12 is arranged on the first surface 11a of the substrate 11 to be adjacent to each other, and the curved prism The unit 12 is preferably formed to be located on the light emitting side of the substrate 11, but may be formed to be located on the incident side of the light beam. The curved prism unit 12 is composed of a first inclined surface 12a and a second inclined surface 12b, and at least one of the first inclined surface 12a and the second inclined surface 12b is a universal stretched curved surface, By forming the irregular wave shape, the surface curvature can be changed, and further, since the light can be refracted in at least the two-dimensional direction, a good condensing phenomenon can be achieved.

1 and 2, the angle between the first inclined surface 12a and the second inclined surface 12b of each curved prism unit 12 in the first embodiment of the present invention is preferably 70 degrees. ° to 160 °, particularly preferably 85 ° to 95 °. Each two adjacent curved prism units 12 are preferably formed to have substantially the same vertical height H (vertical height represents a height perpendicular to the plane of the substrate 11), and The vertical height is preferably 10 μm (micron) to 100 μm (microns), and particularly preferably 20 μm to 75 μm. Further, each two adjacent curved prism units 12 are preferably formed to have a horizontal width W (where the horizontal width represents a width parallel to the plane of the substrate 11). Is preferably 10 µm (microns) to 250 µm (microns), and particularly preferably 25 µm to 80 µm. In addition, each of the two adjacent curved prism units 12 is preferably formed to be able to selectively change the surface curvature along the curved path of the same rule, for example the curved path first bends 5 μm to the right and It can be bent 5 μm to the left, thereby changing the surface curvature along different rules or irregular curved paths.

Example 2

Referring to FIG. 2A, in the composite luminance-enhanced film 1 having diffusion particles of Example 2 of the present invention, the first inclined surface 12a and the second inclined surface 12b of the curved prism unit 12 (that is, At least one curved stretched curved surface) may also be provided to selectively protrude a plurality of side chucks 121 intersected with each other, thereby selecting a continuous change, the same surface curvature, or a change in a different surface curvature.

Referring again to FIGS. 1 and 2, the substrate 11 and the curved prism unit 12 of Embodiment 1 of the present invention may be manufactured from the same light transmitting material using an integral molding method. In addition, the substrate 11 and the curved prism unit 12 may be manufactured from different light-transmitting materials by using a molding method such as patching, stamping, roll, or stamping to meet different characteristics or manufacturing needs. Can further increase the scope of application of the present invention and the degree of freedom of manufacture. The substrate 11 can be selected from various transparent substrates having flexibility, and for example, polyethylene terephthalate (PET), polyethylene (PE), polyethylene naphthalate (PEN), polycarbonate (PC), polyvinyl alcohol (PVA) ), Polyvinyl chloride (PVC) or other high molecular compounds, or a composition thereof. In addition, the curved prism unit 12 may preferably be selected from ultraviolet curing adhesives (UV adhesives).

Referring again to FIGS. 1 and 2 and at the same time referring to a 500-fold micrograph of the composite luminance-enhanced film having the diffusing particles of Example 1 of the present invention shown in FIG. 12, the diffusing particles 13 of Example 1 of the present invention ) Are randomly mixed into the material of the curved prism unit 12 according to a predetermined predetermined ratio, and the weight ratio of the diffusion particles 13 to the curved prism unit 12 is preferably about 1% to 35%. And particularly preferably about 1% to 25%. The diffusion particles 13 are preferably selected from materials different from the curved prism unit 12, and are, for example, acrylic materials and / or glass materials, wherein the glass materials are silicon dioxide (SiO ₂ ), dialuminum trioxide ( Al ₂ O ₃ ), boron oxide (B ₂ O ₃ ), calcium oxide (CaO), magnesium oxide (MgO), silicone resin, polyester resin or styrene resin It can choose from a kind or its composition. Therefore, in the manufacturing process, any kind of conventional mixing method can be employed in the present invention, and for example, diffusion is performed by appropriately mixing 1 to 35 parts by weight of acrylic material or glass material in UV curing adhesive every 100 parts by weight. The structure of the curved prism unit 12 in which the particles 13 are mixed can be manufactured. Further, the average particle diameter of the diffusion particles 13 is preferably 0.5 μm (microns) to 30 μm (microns), and particularly preferably the average particle diameter is 0.5 μm (microns) to 10 μm (microns), so that the processing quality Can help control this. The shape of the diffusing particles 13 may be selected from at least one of a circular, oblong, elliptical, olive, egg or irregular polyhedron or a mixture thereof.

1, 2 and 3 again, in the luminance-enhanced film 1 of Example 1 of the present invention, the shape of the first inclined surface 12a and the second inclined surface 12b of the curved prism unit 12 is Although the same or different choices can be made, at least one of the first inclined surface 12a and the second inclined surface 12b is a curved stretched curved surface, and the curved stretched curved surface forms a curvature of irregular or irregular wave shape so that the surface curvature is increased. As can be varied, it can guide the light beam 14 or light beam 15 incident from the second surface 11b of the substrate 11 to help create at least two-dimensional refraction. Further, in the case of different materials, the diffusing particles 13 of the present invention are mixed in the curved prism unit 12 in an irregular shape or a regular shape, and further, the intersection of each of the diffusing particles 13 and the curved prism unit 12. The interface (not shown) provides an interface for ray refraction, thereby increasing the probability of diffusivity and angular change, because ray 14 or ray 15 can be variously refracted and scattered by the intersection boundary. You can.

As such, referring to FIG. 3, the light beam enters the substrate 11 at a relatively large angle of incidence with respect to the second surface 11b of the substrate 11 (ie, the light beam 14 is formed of the substrate 11). 2 is not relatively perpendicular to the surface 11b), the light beam 15 enters the substrate 11 at a relatively small angle of incidence (less than 6 ° to 9 °) with respect to the second surface 11b (i.e., When the light beam 15 is relatively perpendicular to the second surface 11b of the substrate 11, both the light beam 14 and the light beam 15 are angled by the diffusing particles 13, so that the diffusion effect Since the light beam 14 and light beam 15 also generate spectra according to the myriad diffusions by the diffusing particles 13, the light emission angle can be adjusted and the light beam can be more concentrated, thereby smoothly refraction. Can exit from the first inclined surface 12a and the second inclined surface 12b of the curved prism unit 12, and at the same time, increases the mist concentration relatively. The defects in the structure can be controlled.

More specifically, the diffusing particles 13 of the present invention can effectively lower the total reflection probability of the light beam. In addition, since the first inclined surface 12a and the second inclined surface 12b of the curved prism unit 12 can also provide curvature of the curved surface, it is possible to lower the total reflection probability of the light beam and to condense already scattered scattered light rays. In addition, it is possible to increase the brightness of the brightness enhancement film.

Referring to FIG. 4, FIG. 4 is a curve diagram of transmittance and reflectance of primary rays by the composite luminance-enhanced film having diffusion particles of Example 1 of the present invention. According to the composite luminance-enhanced film having the diffusing particles of the present invention, the primary light transmittance of the light beam 14 and the light beam 15 can be significantly increased, and the light consumption rate can be reduced. That is, by mixing the diffusing particles into the ultraviolet curing adhesive, the incident light rays of the small angle are scattered by the diffusing particles, go through the angle correction and the light beam concentration in the curved prism unit, and then exit from the first surface again. "Light transmittance" increases, the incident light of a small angle is reduced "total reflection", lowers the "consumption rate of light", and further, at least a two-dimensional optimal light converging effect can be obtained.

Referring to FIG. 5, FIG. 5 shows a composite luminance-enhanced film 1 (bending prism unit 12 including diffusion particles 13) having diffused particles of Example 1 of the present invention and the conventional one shown in FIG. It is a curve comparison figure of the primary light transmittance with respect to the brightness enhancement film 9 (bending prism unit which does not contain a diffused particle). Compared with the conventional brightness enhancement film 9 shown in FIG. 11, the increase in the primary transmittance of the brightness enhancement film 1 of the present invention is about 10% to 90%. In addition, it is possible to increase the uniformity of the light source, to adjust the light source, to increase the uniformity of luminance, to increase the horizontal and vertical semi-luminance angles, and to increase the visual angle and increase the luminance value of the dash angle. Further, by acquiring a relatively high mist concentration, it is possible to control structural defects of the luminance-enhanced film 1, to increase the yield of the product and to lower the manufacturing cost. In particular, since the light incident upon the single use of the brightness enhancing film 1 can be uniformly scattered, in the case of a back light module (not shown), when the brightness enhancing film 1 of the present invention is adopted, Since it is not necessary to refit a film and can reduce the demand regarding a diffused film, in this invention, the module of back light can be simplified, and the assembly cost in subsequent assembly operations can be reduced.

6 and 7, FIGS. 6 and 7 show a composite luminance-enhanced film (diffusion of the present invention shown in FIGS. 6 and 7) having diffusion particles of Example 1 of the present invention and a luminance-enhanced film not including conventional diffusion particles. Fig. 6 and Fig. 7 show comparisons of luminance values at the horizontal and vertical time in the state where two sheets of the invention are shown. As shown in Figs. 6 and 7, the results of the test are as follows. In the state of "underdiffusion film only", the brightness value is a minimum value. In addition, through the mixing of the diffusing particles in different ratios, the state of "Chapter 2 of the present invention" has an optical luminance expression and diffusion ability superior to that of "Chapter 2 of the present invention + underdiffusion film", and also the practice of the present invention. Since the brightness-enhancing film of the example has the advantage that a "fog density | concentration" is comparatively high, the effect which can adjust "structure defect" extraly can be achieved. Similarly, when comparing the state of "two pieces of this invention + phase-diffusion film" and "the conventional two pieces of invention + phase-diffusion film, and a lower-diffusion film" through the mixing of diffusion particles of different ratios, "the invention two pieces + phase" The curve of the luminance value of "diffusion film" shows a further upward trend. In addition, in the state of "1 piece of this invention + 1 piece of conventional invention", the brightness value reaches the highest price. That is, when using "one invention of the present invention + one conventional invention", compared with each other state, all have a superior optical surface, and all of them do not need to use a diffused film, The effect can be achieved, and furthermore, the structure of the present invention can achieve the effect of the conventional brightness enhancement film without the need of using an upper diffusion film and a lower diffusion film, and furthermore, the defect control of the prism and the uniformity of the light source. Includes effects.

8 and 9, FIGS. 8 and 9 show a luminance-enhanced film when the composite luminance-enhanced film having diffusion particles of Example 1 of the present invention mixes relatively low proportions of diffusion particles (in FIGS. 8 and 9). Chapter 1 A) of the present invention, the luminance-enhanced film when the relatively high proportion of the diffusion particles are mixed (the present invention Chapter B shown in FIGS. 8 and 9), and the luminance-enhanced film containing no conventional diffusion particles (FIG. 8 and Fig. 9 shows a comparison of the luminance values of the horizontal and vertical time in the state of being used alone. As shown in Figs. 8 and 9, the results of the test are as follows. In the state of "only underdiffusion film", the brightness value is a minimum value. "Invention 1 piece A" or "Invention piece 1 B" has a more uniform distribution of luminance values than "underdiffusion film + conventional invention". In addition, "Invention 1 piece A" or "Invention piece 1 B" is combined with the diffusion effect, and both the angle of the horizontal half luminance and the angle of the vertical half luminance increase (for example, the angle of the horizontal half luminance). Increases from 42 ° to 53 °, and the angle of vertical half-brightness increases from 32 ° to 35 °), while the horizontal time increases, while the vertical time also increases because the energy of the central time diffuses into a relatively large time. . Furthermore, in the case of the dash angle, "Inventive sheet 1 A" or "Inventive sheet 1 B" has higher luminance uniformity than "underdiffusion film + conventional invention", for example, a vertical survey angle If it is 40 degrees, the luminance value of "one piece of this invention A" or "one piece of this invention B" is all higher than the luminance value of "downdiffusion film + conventional invention." In addition, in the present invention, since already having a mist concentration, it is not necessary to reuse the phase diffusion film, it is possible to effectively use the diffusion film.

As described above, in the case of the luminance-enhanced film 9 of the conventional invention shown in Fig. 11, since the luminance-enhanced film 9 is easily emitted from the second surface of the base material 91 by total reflection of the light rays 94, Although there was a problem of lowering the efficiency of the primary transmittance of the light ray 94 and further increasing the consumption rate of light, the composite luminance-enhanced film having the diffusion particles of the present invention shown in FIG. By forming the curved prism unit 12 on the first surface 11a and mixing the diffusing particles 13 in the curved prism unit 12, it is possible to reliably provide at least a two-dimensional condensing effect and a uniform diffusion effect. In addition, the light consumption rate can be lowered by reducing the probability of total reflection of a small angle of incident light and effectively increasing the primary transmittance.

The invention may be practiced in other ways without departing from its spirit and essential features. Accordingly, the preferred embodiments described herein are illustrative and not restrictive.

Claims (19)

A composite luminance-enhanced film having a diffusion particle composed of a base material 11, a plurality of curved prism units 12, and a plurality of diffusion particles 13, wherein the base material 11 has a first surface 11a and a second surface ( 11b) is formed, the plurality of curved prism units 12 are arranged on the first surface 11a of the substrate 11, and two of the plurality of curved prism units 12 adjacent to each other are The surface curvature is varied along a curved path of different rules, and the plurality of curved prism units 12 are composed of a first inclined surface 12a and a second inclined surface 12b, and the first inclined surface 12a and the second inclined surface. 12b is composed of two curved stretched curved surfaces, and the first inclined surface 12a and the second inclined surface 12b are formed to have a plurality of interlocking portions 121 interposed therebetween, thereby incidence from the second surface 11b. Guides the beam of light to produce at least a two-dimensional refraction, The acid particles 13 are mixed in at least the curved prism unit 12, thereby simultaneously diffusing light rays incident from the second surface 11b, and are formed to exit from the curved prism unit 12 again. Composite Brightness Film with Diffusion Particles. The composite luminance-enhanced film according to claim 1, wherein the diffusion particles (13) have a mixing weight ratio of 1% to 35% with respect to the curved prism unit (12). The composite luminance-enhanced film according to claim 1, wherein the diffusing particles are selected from an acrylic material and a glass material. 4. The composite luminance-enhanced film of claim 3, wherein the glassy material is selected from silicon dioxide, dialuminum trioxide, boron oxide, calcium oxide, magnesium oxide, silicone resin, polyester resin, and styrene resin. The composite luminance-enhanced film according to claim 1, wherein the average particle diameter of the diffusing particles (13) is 0.5 micron to 30 microns. The composite luminance-enhanced film having diffusion particles according to claim 1, wherein the shape of the diffusion particles 13 is selected from circular, oblong, oval, olive, egg and irregular polyhedrons. . delete delete delete The composite luminance-enhanced film having diffused particles according to claim 1, wherein an angle formed between the first inclined surface 12a and the second inclined surface 12b of each curved prism unit 12 is 70 ° to 160 °. . delete delete The composite luminance-enhanced film according to claim 1, wherein the curved prism unit (12) is formed to have substantially the same vertical height with respect to the substrate (11). 14. A composite luminance-enhanced film with diffuser particles as recited in claim 13, wherein the vertical height of said curved prism unit (12) is between 10 and 100 microns. The composite luminance-enhanced film according to claim 1, wherein the horizontal prism unit (12) has a horizontal width of 10 microns to 250 microns. The composite luminance-enhanced film according to claim 1, wherein the curved prism unit (12) is adhered to the first surface (11a) of the substrate (11) with an ultraviolet curing adhesive. The composite luminance-enhanced film according to claim 1, wherein the substrate (11) is selected from a flexible transparent substrate. 18. The composite luminance-enhanced film of claim 17, wherein the flexible transparent substrate is selected from polyethylene terephthalate, polyethylene, polyethylene naphthalate, polycarbonate, polyvinyl alcohol, polyvinyl chloride, and polymeric compounds. . The method according to claim 1, wherein the plurality of diffused particles 13 simultaneously diffuses the light incident on the second surface 11b and exits from the curved prism unit 12, thereby reducing the primary light transmittance of the incident light. A composite brightness-enhancing film with diffused particles, characterized in that it increases from 90% to 90%.

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