TWM629984U - Optical axis deflection film and optical axis deflection light-emitting device using the same - Google Patents

Abstract

The present invention relates to an optical axis deflection film and an optical axis deflection light-emitting device using the same. The optical axis deflection film includes a base material and a plurality of first optical bodies. The base material is made of light-transmitting material and has parallel light-facing surfaces. and the light-emitting surface, the first optical bodies are arranged on the light-facing surface, and each first optical body includes a first main inclined surface, which has a first main angle between 5° and 45° with the light-facing surface. , and each of the first principal angles are the same, so that the light is deflected and emitted after passing through the optical axis deflecting film.

Description

Optical axis deflection film and optical axis deflection light-emitting device using the same

This creation is about an optical film and a light-emitting device using the same, especially an optical axis deflection film and an optical axis deflection light-emitting device using the optical axis deflection film.

Generally, display products are designed with the panel normal as the center axis of the zero-degree angle as the central axis-symmetric light field. However, as display manufacturers begin to enter the niche application market, such a brightness distribution design cannot satisfy the main viewing angle that is not on the central axis. unconventional off-axis applications. In order to meet the display application requirements of off-axis light field design, it is necessary to develop an optical deflection element to be added to the existing display module to change the brightness distribution of the display with minimal impact on the existing process.

One purpose of the present invention is to provide an optical axis deflection film and an optical axis deflection light-emitting device using the same. The optical axis deflection film can change the traveling direction of the incident light to make it deflected out. When applied to the optical axis deflection light-emitting device, it can make Brightness distribution with an off-axis light field, and allows display products to meet market-specific needs with minimal impact on existing processes.

In order to achieve the above purpose, the optical axis deflecting film of the present invention includes a base material and a plurality of first optical bodies. The base material is made of a light-transmitting material and has a light-facing surface and a light-emitting surface that are parallel to each other. The first optical bodies are arranged on the light-facing surface, each of the first optical bodies includes a first main inclined surface, and the first main inclined surface and the light-facing surface have a first main angle between 5° and 45°, and Each of the first principal angles is the same, so that the light is deflected and emitted after passing through the optical axis deflecting film.

The optical axis deflection light-emitting device of the present invention includes a light source module and the optical axis deflection film. The light source module is a self-luminous light source module or a non-self-luminous light source module. The light source module has a light emitting side. The optical axis deflecting film is arranged on the light emitting side of the light source module to deflect the angle of the light emitted by the light source module, so as to make the light field distribution of the optical axis deflection light-emitting device change from the central axis-symmetric light field to the off-axis light field The brightness distribution of the light field.

The technical content and features of the present creation will be described in detail below by means of a plurality of preferred embodiments in conjunction with the drawings. Please refer to FIG. 1 and FIG. 1A , which is an optical axis deflection film 10 provided by a preferred embodiment of the present invention, comprising a substrate 11 , a plurality of first optical bodies 12 and a plurality of second optical bodies 13 . The substrate 11 has a light-facing surface 111 and a light-emitting surface 112 that are parallel to each other. The substrate 11 is made of a light-transmitting material, and the light-transmitting material may be polyethylene terephthalate (PET), polycarbonate (PC) or polymethyl methacrylate (PMMA). In some embodiments of the present invention, the substrate 11 , the first optical bodies 12 and the second optical bodies 13 are integrally formed and made of the same material.

In this embodiment, the first optical bodies 12 are arranged in parallel on the light-facing surface 111 in an elongated shape. The cross section of each of the first optical bodies 12 is triangular, and each of the first optical bodies 12 includes a first main slope 121 with a larger area than the rest of the surfaces. The first main slope 121 has an inclined direction D1. At the same time, there is a first main angle θ 1 between the first main inclined surface 121 and the light facing surface 111 . The range of the first main angle θ 1 is between 5° and 45°, and a preferred range is between 10° and 40°. The first principal included angles θ 1 of the first optical bodies 12 are all the same.

In this embodiment, the second optical bodies 13 are also arranged in parallel on the light emitting surface 112 in a strip shape. The cross section of each of the second optical bodies 13 is triangular, and each of the second optical bodies 13 includes a second main slope 131 with a larger area than the rest of the surfaces. The second main inclined surface 131 has an inclined direction D2, and a second main included angle θ 2 is formed between the second main inclined surface 131 and the light exit surface 112 . The range of the second main angle θ 2 is between 3° and 45°, and a preferred range is between 10° and 40°. The second principal angles θ 2 of the second optical bodies 13 may be the same or different. According to the experimental results, the second principal angles θ 2 of the second optical bodies 13 having different second principal angles have better light deflection effects, and The higher the variability of the second principal angle θ2, the better the light deflection effect.

It is worth noting that the inclination direction D1 of the first main inclined surface 121 of each of the first optical bodies 12 of the optical axis deflecting film 10 of the present invention is substantially the same as the inclined direction D2 of the second main inclined surface 131 of each of the second optical bodies 13 same as above. In order to clearly define the above-mentioned “inclined direction”, please refer to FIG. 2 . Taking the first optical body 12 as an example, the first main slope 121 intersects with a horizontal plane HP (parallel to the light-facing surface 111 ) and is at the first main slope. A straight line S is formed on the 121, perpendicular to the straight line S and along the first main slope 121 downward to form an inclined line D0, the direction of the projection line of the inclined line D0 on the horizontal plane HP is the first main slope 121 the inclination direction D1.

Thereby, the light from the bottom of FIG. 1A will be deflected and refracted toward the left of the drawing surface after passing upward through the optical axis deflecting film 10 , so as to achieve the purpose of the present invention. In this embodiment, the shapes of the first optical bodies 12 and the second optical bodies 13 are both triangular cylinders, but not limited to this, and the shapes of the first optical bodies 12 may be different from those of the third optical bodies The shape of the two optical bodies 13, and the shape of the first optical bodies 12 or the second optical bodies 13 can be a long column with a trapezoid, fan, polygon or other shape in cross section, as long as it can be formed with the The first main slope 121 having the first main angle θ1 between the substrates 11 or the second main slope 131 having the second main angle θ2 between the substrates 11 may be formed. In addition, the first main slope 121 or the second main slope 131 can also be an arc surface, as long as the outer tangent can form the first main angle θ1 or the second main angle θ2 with the substrate 11 .

As shown in FIG. 3, taking the first optical body 12a, 12b, 12c or 12d as an example, the first optical body 12a, 12b, 12c or 12d can be an elongated cylindrical body and the cross section is as shown in (a) ), a sector as shown in aspect (b), a polygon as shown in aspect (c), or a cambered polygon as shown in aspect (d). Wherein, the first main slope 121d of the first optical body 12d of the aspect (d) is an arc surface, and an outer tangent L of the arc surface 121d is aligned with the light-facing surface 111 of the substrate 11 as shown in FIG. 1A . The first main angle θ1 is formed.

In a preferred embodiment of the present invention, the haze of the substrate 11 may be between 0.1% and 99%, but preferably less than 15%. In the preferred embodiment of the present invention, the materials of the first optical bodies 12 and the second optical bodies 13 are mainly UV-curable resin, and the refractive index is 1.59, but can be 1.38~1.95.

In some embodiments of the present invention, the substrate 11 includes an electrically adjustable liquid crystal layer inside.

Please refer to FIG. 4 and FIG. 4A , which is an optical axis deflection film 20 provided by another preferred embodiment of the present invention, comprising a substrate 21 , a plurality of first optical bodies 22 and a plurality of second optical bodies 23 . In this embodiment, the first optical bodies 22 and the second optical bodies 23 are distributed on the light-facing surface 211 and the light-emitting surface 212 of the substrate 21 in a granular array, respectively.

In this embodiment, each of the first optical bodies 22 is in the shape of a quadrangular pyramid, and has a first main slope 221 and a first sub slope 222 . The inclination directions (not marked) of the first sub-inclined surface 222 and the first main inclined surface 221 are different. Wherein, there is a first main angle (not marked) between the first main inclined surface 221 and the light-facing surface 211 , and a first sub-angle (not marked) between the first sub-inclined surface 222 and the light-facing surface 211 ). The first main angle is between 5° and 45°, and the first secondary angle is between 5° and 45°. The preferred range of the first main included angle and the first secondary included angle is between 10° and 40°.

In this embodiment, the shape of each of the second optical bodies 23 is also a quadrangular pyramid, and has a second main slope 231 and a second sub slope 232 . The inclination directions (not marked) of the second sub-inclined surface 232 and the second main inclined surface 231 are different. Wherein, there is a second main angle (not marked) between the second main inclined surface 231 and the light exit surface 212 , and a second sub angle (not marked) is formed between the second sub inclined surface 232 and the light exit surface 212 . The second main angle is between 3° and 45°, and the second secondary angle is between 3° and 45°. The preferred range of the second main angle and the second sub angle is between 10° and 40°.

In the foregoing two embodiments, the first optical body 12 and the second optical body 13 are arranged in a one-dimensional extension, and the resulting light field adjustment effect is a single dimension. On the contrary, the first optical body 22 and the second optical body The arrangement of the bodies 23 is a two-dimensional array, which can produce a multi-dimensional light field adjustment effect. In this embodiment, not only the first main slopes 221 of the first optical bodies 22 and the second The inclination directions of the two main inclined surfaces 231 are the same, and the inclination directions of the first sub-inclined surfaces 222 of the first optical bodies 22 and the second sub-inclined surfaces 232 of the second optical bodies 23 are also the same. However, in other embodiments of the present invention, the first main slopes 221 of the first optical bodies 22 and the second main slopes 231 of the second optical bodies 23 have the same inclination directions, but the first optical bodies 22 The inclination directions of the first sub-slopes 222 and the second sub-slopes 232 of the second optical bodies 23 are not the same, so that a more complex light field adjustment effect can be produced.

In other embodiments of the present invention, the first optical bodies are arranged in strips in parallel on the light-facing surface of the substrate, and the second optical bodies are distributed in a granular array on the light-emitting surface of the substrate. In other embodiments of the present invention, the first optical bodies are arranged in a granular array on the light-facing surface of the substrate, and the second optical bodies are arranged in strips and parallel to the light-emitting surface of the substrate. The particle shape is not limited to a quadrangular pyramid, and can be other shapes such as pyramids, prisms or sectors, as long as it can form the first main slope with the first main angle between the base material or the base material. The second main slope with the second main angle between the materials is sufficient.

As shown in FIG. 5, taking the first optical body 22a, 22b or 22c as an example, the shape of the first optical body 22a, 22b or 22c can be a polygonal pyramid as shown in aspect (e), The wedge-shaped body shown in aspect (f) or the fan-shaped body as shown in aspect (g), and in these embodiments, each of the first main slopes 221a, 221b or 221c is the same as that shown in FIG. 4 . It is shown that the first main angle is formed between the substrates 21 . Wherein, the first optical body 22a of the aspect (e) further has a first sub-inclined surface 222a, the first sub-inclined surface 222a and the first main inclined surface 221a have different inclination directions, and the first sub-inclined surface 222a is similar to the one shown in the figure The light-facing surfaces 211 of the substrate 21 shown in 4 have the first sub-angle.

The optical axis deflection light-emitting device of the present invention includes a light source module and the optical axis deflection film, the light source module has a light exit side, and the optical axis deflection film is arranged on the light exit side of the light source module to deflect the light angle. The light source module can be a self-luminous light source module or a non-self-luminous light source module, and the self-luminous light source module can be an electroluminescence (EL) panel, an organic light-emitting diode (OLED) panel, a miniature Light Emitting Diode (Mini-LED) panel or Micro-Light Emitting Diode (Micro-LED) panel.

In some embodiments of the present invention, the light source module and the optical axis deflecting film are spaced by air or adhered to each other by optical adhesive (OCA) with a transmittance greater than 85%.

Please refer to FIG. 6 , which is an optical axis deflection light-emitting device 100 provided by a preferred embodiment of the present invention, comprising a light source module 200 and the optical axis deflection film 10 , the light source module 200 is a non-self-luminous light source module The group has a light-emitting side 210 . The optical axis deflection film 10 is disposed on the light-emitting side 210 of the light source module 200 . The light source module 200 includes a light source 220 , a fin 230 , a light guide plate 240 and a reflection sheet 250 . The prism sheet 230 has a plurality of prism columns 233 arranged in parallel with the second optical bodies 13 to concentrate light. The light guide plate 240 is located on the light incident side of the fin 230 . The light source 220 is located on one side of the light guide plate 240 . The light guide plate 240 has a back side 241 , a light exit side 242 opposite to the back side 241 , and most of the third optical bodies 243 with triangular cross-sections are located on the light exit side 242 of the light guide plate. The third optical bodies 243 may be arranged in parallel in a strip shape or distributed in a granular array. The reflection sheet 250 is located on the back side 241 of the light guide plate, and is used for reflecting the light from the light guide plate 240 . Thereby, the optical axis deflection light-emitting device 100 has the brightness distribution of the off-axis light field, and the optical axis deflection film 10 is placed on the light output side 210 of the conventional light source module 200 to achieve the effect of optical axis deflection. Align display products to specific market needs with minimal impact on existing processes.

In fact, the optical axis deflecting film 10 of the present invention can be matched with light source modules of different structures to deflect the optical axis of the display. Please refer to FIG. 7 , which is an optical axis deflection light-emitting device 100 ′ provided by another preferred embodiment of the present invention, comprising a light source module 300 and the optical axis deflection film 10 , and the light source module 300 is non-self-illuminating type The light source module has a light emitting side 310 . The optical axis deflection film 10 is disposed on the light-emitting side 310 of the light source module 300 . The light source module 300 includes a light source 320 , two diaphragms 330 and 330 a , a light guide plate 340 and a diffuser 350 . A plurality of parallel columns 331 and 331a are respectively arranged on the two plates 330 and 330a to concentrate the light. Wherein, the poles 331 on the pole piece 320 are parallel to the extending direction of the second optical bodies 23 . The poles 331a on the other pole piece 330a are arranged to be perpendicular to the extending direction of the second optical bodies 23 . The light guide plate 340 and the diffuser 350 are located on the light incident side of the two fins 330 and 330a, the light source 320 is located on one side of the light guide plate 340, and the diffuser 350 is used for uniformly diffusing the light.

In other embodiments of the present invention, the optical axis deflecting light-emitting device may include a larger number of wafers, each of the wafers has a plurality of wafers arranged in parallel, and only at least any one of the wafers has a larger number of wafers. The poles may be arranged parallel to the extending direction of the second optical bodies 23 of the optical axis deflection film 20 .

Through the above design, the optical axis deflection films 10 and 20 provided by the present invention can deflect the angle of light rays, so that the optical axis deflection light-emitting devices 100 and 100' applied therewith have an off-axis light field distribution, so as to achieve the purpose of the present invention. . Based on the design spirit of the present creation, the microstructure design on the optical axis deflection films 10, 20 and the configuration of the optical axis deflection light-emitting devices 100, 100' can be modified from the various implementations described above. The number and size ratio of each element are only for illustration, and can be adjusted as required during actual manufacturing. The optical axis deflecting film 10, 20 at least has the first optical bodies 12, 22 and the second optical bodies 13, 23. One is sufficient, and all such structural changes that can be easily thought of should be covered by the scope of the patent application for this creation.

100,100': Optical axis deflection light-emitting device

200,300: Light source module

210, 310: light-emitting side

220,320: light source

230, 330, 330a: Pills

233, 331, 331a: Pillars

3311: End face

240: light guide plate

241: The light-facing side of the light guide plate

242: The light-emitting side of the light guide plate

243: Third Optical Body

250: Reflector

350: Diffuser

10,20: Optical axis deflection film

11,21: Substrate

111, 211: Greeting side

112,212: light-emitting surface

12, 12a, 12b, 12c, 12d, 22, 22a, 22b, 22c: first optical body

121, 121a, 121b, 121c, 121d, 221, 221a, 221b, 221c: The first main slope

122, 222, 222a: The first secondary slope

13,23: Second Optical Body

131, 231: Second main slope

132,232: Second sub-slope

HP: Horizontal imaginary plane

S: straight line

D0: inclined line

D1, D2: Tilt direction

θ 1: The first principal angle

θ 2: The second principal angle

L: Outer tangent

FIG. 1 is a perspective view of an optical axis deflecting film according to a preferred embodiment of the creation; 1A is a schematic side view of the optical axis deflecting film in FIG. 1; FIG. 2 is a schematic structural diagram of the first optical body of the optical axis deflection film in FIG. 1; 3 is a schematic side view of various implementations of the first optical body of the optical axis deflecting film of the present invention; FIG. 4 is a perspective view of an optical axis deflecting film according to another preferred embodiment; 4A is a schematic structural diagram of the first optical body and the second optical body of the optical axis deflection film in FIG. 4; 5 is a perspective view of various implementations of the first optical body of the optical axis deflecting film of the present invention; 6 is a schematic structural diagram of an optical axis deflection light-emitting device according to a preferred embodiment; FIG. 7 is a schematic structural diagram of an optical axis deflection light-emitting device according to another preferred embodiment.

10: Optical axis deflection film

11: Substrate

111: Greeting surface

112: light-emitting surface

12: First Optical Body

121: The first main slope

13: Second Optical Body

131: Second main slope

D1, D2: Tilt direction

θ 1: The first principal angle

θ 2: The second principal angle

Claims (28)

An optical axis deflecting film, comprising: a base material, which is made of light-transmitting material and has a light-facing surface and a light-emitting surface that are parallel to each other; a plurality of first optical bodies are arranged on the light-facing surface, the first The optical body includes a first main inclined surface, and a first main included angle between the first main inclined surface and the light facing surface is between 5° and 45°, and each of the first main included angles are the same. The optical axis deflecting film as claimed in claim 1, wherein the first optical body further comprises a first sub-inclined surface, and a first sub-inclined surface between the first sub-inclined surface and the light-facing surface has a first pair between 5° and 45°. The included angle is different from the inclination direction of the first secondary slope and the first main slope. The optical axis deflecting film as claimed in claim 2, further comprising a plurality of second optical bodies disposed on the light emitting surface, the second optical bodies comprising a second main slope, between the second main slope and the light emitting surface There is a second main angle between 3° and 45°, and each of the second main angles is the same or different; wherein, the inclination directions of the first main slope and the second main slope are substantially the same. The optical axis deflecting film of claim 3, wherein the second optical body further comprises a second sub-inclined surface, and a second sub-inclined angle between the second sub-inclined surface and the light-emitting surface is between 3° and 45°. , the inclination direction of the second sub-slope is the same as that of the first sub-slope. The optical axis deflection film according to claim 1, wherein the material of the first optical body is UV-curable resin, and the refractive index is 1.38-1.95. The optical axis deflection film according to claim 3, wherein the material of the second optical body is UV-curable resin, and the refractive index is 1.38-1.95. The optical axis deflecting film according to claim 1, wherein the first optical systems are arranged in parallel in a strip shape, or distributed in a granular array. The optical axis deflecting film according to claim 3, wherein the second optical systems are arranged in a long strip in parallel, or are distributed in a granular array. The optical axis deflection film according to claim 3, wherein the base material, the first optical bodies and the second optical systems are integrally formed and made of the same material. The optical axis deflection film of claim 3, wherein the first principal angle is between 10° and 40°, and the second principal angle is between 10° and 40°. The optical axis deflection film according to claim 1 or 3, wherein the haze of the substrate is between 0.1% and 99%. The optical axis deflection film according to claim 1 or 3, wherein the substrate contains a liquid crystal layer whose electrical properties can be adjusted. An optical axis deflection film, comprising: a base material, which is made of light-transmitting material and has a light-facing surface and a light-emitting surface parallel to each other; and a plurality of second optical bodies, which are arranged on the light-emitting surface, the second optical body The optical body includes a second main inclined surface, and a second main included angle between the second main inclined surface and the light-emitting surface is between 3° and 45°, and the second main included angles are the same or different. The optical axis deflecting film of claim 13, wherein the second optical body further comprises a second sub-inclined surface, and a second sub-inclined angle between the second sub-inclined surface and the light-emitting surface is between 3° and 45°. , the inclination directions of the second sub-inclined surface and the second main inclined surface are different. The optical axis deflection film according to claim 13, wherein the material of the second optical body is UV-curable resin, and the refractive index is 1.38-1.95. The optical axis deflecting film as claimed in claim 13, wherein the second optical systems are arranged in parallel in long strips, or distributed in a granular array. The optical axis deflection film according to claim 13, wherein the base material and the second optical systems are integrally formed and made of the same material. The optical axis deflection film of claim 13, wherein the second principal angle is between 10° and 40°. The optical axis deflection film according to claim 13, wherein the haze of the substrate is between 0.1% and 99%. The optical axis deflection film as claimed in claim 13, wherein the substrate comprises a liquid crystal layer with an electrically adjustable liquid crystal layer. An optical axis deflection light-emitting device, comprising: a light source module, which is a self-luminous light source module or a non-self-luminous light source module, the light source module has a light-emitting side; and any one of claims 1 to 20. One of the optical axis deflecting films is arranged on the light-emitting side of the light source module to deflect the angle of light. The optical axis deflection light-emitting device as claimed in claim 21, wherein the self-luminous light source module is an electroluminescent (EL) panel, an organic light-emitting diode (OLED) panel, and a mini light-emitting diode (Mini-LED) Panel or Micro-Light Emitting Diode (Micro-LED) panel. The optical axis deflecting light-emitting device as claimed in claim 21, wherein there is air or optical adhesive (OCA) with a transmittance greater than 85% between the light source module and the optical axis deflecting film. An optical axis deflection light-emitting device, comprising: a light source module, which is a non-self-luminous light source module, the light source module has a light emitting side; The optical axis deflection film described in any one of 20 is arranged on the light-emitting side of the light source module to deflect the angle of light, wherein the non-self-luminous light source module includes a light The source, and at least one iris sheet, the iris sheet has a plurality of iris columns arranged parallel to the second optical bodies, so as to concentrate the light. The optical axis deflection light-emitting device as claimed in claim 24, wherein the non-self-luminous light source module further comprises a light guide plate located on the light incident side of the fin, and the light source is located on at least one side of the light guide plate. The optical axis deflection light-emitting device as claimed in claim 25, wherein the light-emitting side of the light guide plate has a plurality of third optical bodies with triangular cross-sections, and the third optical systems are arranged in parallel strips or in a granular array. . The optical axis deflection light-emitting device as claimed in claim 25 or 26, wherein the non-self-luminous light source module further comprises a reflection sheet located on a side opposite to the light-emitting side of the light guide plate for reflecting the light from the light guide plate . The optical axis deflection light-emitting device according to claim 24 or 25, wherein the non-self-luminous light source module further comprises a diffuser located on the light-incident side of the fin for uniformly diffusing the light.

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