KR20110108619A - An optical unit and optical structures - Google Patents

Abstract

The present invention relates to an optical unit and an optical structure, and more particularly, an optical unit including a lens unit and an absorbing unit for absorbing light collected by the lens unit, and one side of the substrate is patterned in a lens shape and the other side. The present invention relates to an optical structure in which an absorber for absorbing light collected by the lens shape is patterned, and thus the absorption rate varies according to the light traveling direction, thereby absorbing light on the lens-shaped pattern side and transmitting light on the absorber side.

Description

Optical unit and optical structure {AN OPTICAL UNIT AND OPTICAL STRUCTURES}

The present invention provides an optical unit capable of absorbing light vertically incident to the lens unit, and an optical structure capable of absorbing light on the lens-shaped pattern side and transmitting light on the light absorber side due to different absorption ratios depending on the light propagation direction. It is about.

The display device uses various functional films such as a light collecting film or an antireflection film to improve the light efficiency.

The light collecting film usually has a lens structure periodically arranged on one surface thereof to deflect the optical path.

Commonly used lens structures include triangular prism lenses, semi-circular lenticular lenses, micro lenses, Fresnel lenses, and the like. These lens structures serve to improve luminance by condensing the light emitted from the light source toward the front of the display.

The antireflective film serves to reduce the reflectance to improve the visibility of information through the medium.

This reduction in reflectance is widely used in vehicle glass, protective eyewear, computer monitor screens, television screens and display panels.

Typical antireflective films employ an inorganic layer, such as a metal or metal oxide layer, a silica layer and an indium tin oxide (ITO) layer on the film surface.

Various functional films as described above are suitable to perform their role, but there is a limit to simultaneously performing a complex function using one film. Therefore, when two or more complex functions are required, there is a problem that the number of functional films must be increased together.

In the dual organic light emitting diode display device, a metal layer is applied to smooth moisture blocking and current flow. Due to the influence of the metal layer, the reflectance of light incident from the outside is large, so that the antireflection film is generally disposed at the outermost portion of the display device.

In this case, the external light is absorbed and removed by the anti-reflection film, but there is a problem in that the light emission efficiency is lowered because the transmittance of the light emitted from the inside is less than half.

On the other hand, a reflective film is used in a field where observation is required from one side or a field requiring security from the outside. This uses the difference in the illuminance of light, which is a phenomenon in which dark areas look like mirrors when viewed in bright places.

That is, there is a limit that the above phenomenon can be generated only when one side is maintained to have a large amount of light and the other side is kept to a small amount of light.

An object of the present invention is to provide an optical unit capable of absorbing light incident on the lens unit side.

In addition, the present invention is to provide an optical structure in which the absorption rate is different depending on the light traveling direction to absorb the light incident from the lens-shaped pattern side, the light incident from the absorber side can transmit.

In addition, the present invention is to provide an optical structure that can be observed by the observer of the lens-shaped pattern side by using the difference in absorption rate according to the direction of light propagation, but the observer of the absorber side can not see the lens-shaped pattern side do.

1. An optical unit comprising a lens unit and a light absorbing unit for absorbing light collected by the lens unit.

2. In the above 1, the light absorbing unit is formed in the focus region of the light passing through the optical unit.

3. The optical unit according to the above 1, wherein the lens unit has a hemispherical shape or some form of an egg formed on the substrate or an arcuate pillar formed on the substrate.

4. The optical unit according to the above 1, wherein the lens unit has a refractive index greater than one.

5. An optical structure in which a lens shape is patterned on one side of a substrate and a light absorber is patterned on the other side to absorb light collected by the lens shape.

6. In the above 5, the light absorber is an optical structure formed in the region between the focus position of the light passing through the lens shape and the lens shape.

7. In the above 5, the optical structure is further patterned in the shape of a lens for collecting light incident from the light absorber side between the light absorbers.

8. The optical structure according to the above 7, wherein the groove or plate structure is formed in the focal region of the light passing through the lens shape.

9. The optical structure according to the above 5 or 7, wherein the lens shape is hemispherical or part of an egg or arcuate column.

10. The optical structure according to the above 5, wherein the substrate has a refractive index greater than one.

The optical unit of the present invention has the effect of absorbing light incident to the lens unit side.

In addition, the optical structure of the present invention has the effect that the absorption rate is different depending on the direction of light absorption to absorb the light on the lens-shaped pattern side, the light on the light absorber side can transmit.

In the optical structure of the present invention, the observer on the lens pattern side shows the absorber side, but the observer on the light absorber side does not show the lens pattern side.

In addition, the optical structure of the present invention is required to observe from one of the anti-reflection film of the display device such as OLED, psychological observation room of the hospital, interrogation room and interrogation room of the police station, monitoring equipment for preventing theft of goods in the store, It can be used in fields requiring security from the outside such as automobiles and buildings.

1 shows a cross section of an optical unit according to the invention,
2 to 4 show cross sections of an exemplary optical structure according to the invention,
5 to 6 are perspective views showing a path of light passing through an exemplary optical structure according to the present invention.

The present invention relates to an optical unit capable of absorbing light incident on the lens unit side, and an optical structure capable of absorbing light on the lens pattern side and transmitting light on the light absorber side due to different absorption ratios depending on the traveling direction of light. will be.

Hereinafter, the optical unit according to the present invention will be described in detail.

As shown in FIG. 1, the optical unit of the present invention includes a lens unit 10 and a light absorbing unit 30 that absorbs light collected by the lens unit 10.

The light absorbing portion is formed in the focus region of the light passing through the lens.

The light absorbing portion is not limited as long as it can absorb light collected by the lens. Specifically, materials such as an oxo light absorber, an iodine light absorber, an absorbent dye or a pigment can be used.

The shape of the lens unit is not particularly limited as long as it can collect light incident from the outside. For example, hemispherical or some form of egg may be formed on the substrate, or an arcuate pillar may be formed on the substrate. At this time, since the focus of the light collected by the lens varies depending on their shape and refractive index, it is preferable to appropriately adjust the thickness of the substrate.

In addition, the refractive index of the lens portion exceeds one.

The refractive index represents the ratio of the speed of light in the medium and in the vacuum space. The refractive index of the free space is 1.

The lens unit is designed to have a refractive index of more than 1 so as to effectively absorb light incident from the outside air, and in the case of a transparent solid medium such as glass, the refractive index exceeds 1.3. For example, when a hemispherical or some form of egg is formed on the substrate or an arcuate pillar is formed on the substrate, the refractive index of the substrate is designed to be greater than one.

In addition, the lens unit is not particularly limited in its material, and specifically, a resin selected from an ultraviolet curable resin, an electron beam curable resin, and a thermosetting resin can be used. Preferably, polycarbonate resin or acrylic resin is used.

In particular, the optical unit according to the present invention can effectively absorb light incident perpendicularly to the lens portion side.

Hereinafter, the optical structure according to the present invention will be described in detail.

2 to 4, the optical structure according to the present invention absorbs light collected by the lens shape 1 on one surface of the substrate 20 and the light collected by the lens shape on the other surface of the substrate 20. The sieve 3 is formed by the pattern 31.

The substrate uses a transparent substrate whose refractive index is greater than 1 to favor the passage of light. For example, a glass substrate or a transparent polymer substrate may be used.

The transparent polymer substrate is not particularly limited, but may be used in consideration of transparency, mechanical strength, thermal stability, moisture shielding, and the like. Specifically, polyolefin resin, polyester resin, cellulose resin, polycarbonate resin, acrylic resin, styrene resin, vinyl chloride resin, amide resin, imide resin, polyether sulfone resin, sulfone resin, Polyether sulfone resin, polyether ether ketone resin, polyphenylene sulfide resin, vinyl alcohol resin, vinylidene chloride resin, vinyl butyral resin, allylate resin, polyoxymethylene resin and epoxy resin One selected from the group consisting of can be used.

The thickness of the substrate can be appropriately controlled in consideration of the lens shape, the focal length of the light passing through the lens shape, the arrangement of the patterns, and the like.

The shape of the lens is not particularly limited as long as it can collect light incident from the outside. For example, hemispherical or some forms of eggs or arched pillars may be used.

In addition, as an example, the lens shape may be a cylindrical lens shape having a vertical cross section of a semicircle or a semi-elliptic shape or a cylindrical lens shape having an arcuate image.

In addition, each lens shape may be the same or different shapes. However, since the focal length varies depending on the shape of the lens, it is preferable to design differently according to the position of each light absorber and the thickness of the substrate in consideration of this.

In addition, each lens shape may be arranged in a row or arranged in a zigzag manner such that each lens shape intersects.

The light absorber is formed in the region between the focal position of the light passing through the lens shape and the lens shape.

The material is not limited as long as the light absorber can absorb light collected by the lens shape. Specifically, materials such as an oxo light absorber, an iodine light absorber, an absorbent dye or a pigment can be used.

In addition, a lens shape for collecting light incident from the light absorber side may be further patterned between the light absorbers.

In addition, the patterned lens shape may improve the transmittance of light incident from the light absorber side by reducing the loss of light reflected by the refractive index difference between the air layer on the light absorber side and the substrate.

 The lens shape patterned between the light absorbers may have a groove or plate structure formed in a focal region of light passing therethrough. The groove or plate structure can be adjusted according to the focus of light.

The plate structure further serves to collect and transmit the light collected by the patterned lens shape. In the case where the lens-shaped pattern is adjacent without forming the plate structure, light incident vertically is not transmitted but is reflected, thereby forming a plate structure in the focal region of the light to improve this.

In addition, the groove structure is a shape for increasing the transmission efficiency by vertically transmitting the light collected by the patterned lens shape. The groove structure is preferably adjusted appropriately to the focus area of the light in consideration of the incident light and the bend of the groove.

The optical structure according to the present invention has a different absorption rate according to the light propagation direction, so that the light on the lens pattern side can be absorbed and the light on the light absorber side can be transmitted.

At this time, it is preferable for each light incident on the lens-shaped pattern side and the light absorber side to be incident close to the perpendicular to the substrate in order to improve light absorption and transmission efficiency.

2 to 4 illustrate a cross section of an optical structure in which a lens is patterned on one side of a substrate and a light absorber on the other side is patterned to absorb light collected by the lens shape.

2 is a cross-sectional view of an optical structure in which lens shapes are disposed adjacent to each other.

In addition, FIG. 3 is an optical structure in which a lens formation for collecting light incident from the light absorber side between the light absorbers is further patterned, and a plate structure is formed in the focal region (lens pattern side) of the light passing through the lens shape. The cross section is shown.

In addition, FIG. 4 is further patterned to form a lens for collecting light incident from the light absorber side between the light absorbers, the optical structure having a groove structure in the focus region (lens pattern side) of the light passing through the lens shape The cross section of the structure is shown.

5 and 6 are perspective views showing a path of light passing through an exemplary optical structure according to the present invention, in which light incident on the lens-shaped pattern side is absorbed and light incident on the light absorber side is transmitted.

In FIG. 5, a lens shape for collecting light incident from the light absorber side is further patterned between the light absorbers, and a plate structure is formed in the focal region (lens shape pattern side) of light passing through the lens shape. 6, a groove structure is formed in the focus region (lens pattern side) of light passing through the lens shape.

The optical structure of the present invention can be applied to various fields with the above effects. Specifically, the present invention can be applied to an antireflection film of an organic light emitting diode, a field requiring observation from one side, or a security required.

When applied to the outermost layer of the organic light emitting diode as an anti-reflection film, the external light incident on the lens-shaped pattern side with respect to the vertical light source is absorbed, and the internal light emitted from the light absorber side is transmitted, so that the light source efficiency inside the organic light emitting diode is Can improve.

Hereinafter, preferred examples are provided to aid the understanding of the present invention, but the following examples are merely for exemplifying the present invention, and it will be apparent to those skilled in the art that various changes and modifications can be made within the scope and spirit of the present invention. It is natural that such variations and modifications fall within the scope of the appended claims.

Example 1 Optical Unit

A lens portion having a hemispherical lens made of polycarbonate was formed on one surface of an acrylic substrate having a refractive index of 1.57, a thickness of 0.03 mm, a width of 0.04 mm, and a length of 0.04 mm. A hemispherical lens having a thickness of 0.02 mm and a diameter of 0.04 mm was used.

On the other side of the substrate, a circular light absorbing portion having a diameter of 0.017 mm was formed at a focus portion where light is collected by the lens portion. As the light absorber, an iodine light absorber was used.

Examples 2-8: Optical Structure

Example 2

The hemispherical lens shapes of polycarbonate resin having a thickness of 0.03 mm and an arc diameter of 0.04 mm were patterned on one side of an acrylic substrate having a width of 10 cm, a length of 10 cm, and a thickness of 0.02 mm.

On the other side of the substrate, an optical structure was manufactured by patterning a circular light absorber having a diameter of 0.017 mm to a focus portion where light is collected by a lens shape (FIG. 2).

Example 3

In the same manner as in Example 2, the width of 10cm, the length of 10cm, the thickness of 0.02mm on one side of the substrate in the transverse direction of the substrate thickness of 0.03mm, the cross-section is semi-circular, the diameter of the semi-circular is 0.04mm The shape of a portion of the circumference was patterned such that the lens shapes were adjacent to each other.

On the other side of the substrate, an optical structure patterned with a light absorber having a width of 0.004 mm and a length of 10 cm was formed at a focal point where light is collected by a lens shape shaped as a part of the circumference. As the light absorber, an iodine light absorber was used (FIG. 3).

Example 4

In the same manner as in Example 2, with a space of 0.004 mm between the hemispherical lens shapes having a thickness of 0.03 mm and a diameter of 0.04 mm on one side of a substrate having a width of 10 cm, a length of 10 cm, and a thickness of 0.02 mm. Patterned.

On the other side of the substrate, an optical structure was manufactured by patterning a circular light absorber having a diameter of 0.017 mm at a focus portion where light is collected by a lens shape.

The hemispherical lens shape for collecting light incident from the light absorber side between the light absorbers is further patterned, and the patterned hemispherical lens shape is the same as above (Fig. 5).

Example 5

In the same manner as in Example 2, with a space of 0.004 mm between the hemispherical lens shapes having a thickness of 0.03 mm and a diameter of 0.04 mm on one side of a substrate having a width of 10 cm, a length of 10 cm, and a thickness of 0.02 mm. Patterned. The space was intaglio patterned in the shape of an arcuate column with a diameter of 0.004 mm and a length of column of 0.002 mm.

On the other side of the substrate, an optical structure was manufactured by patterning a circular light absorber having a diameter of 0.017 mm at a focus portion where light is collected by a lens shape.

The hemispherical lens shape for collecting light incident from the light absorber side between the light absorbers is further patterned, and the patterned hemispherical lens shape is further the same as above (Fig. 6).

Example 6

The same method as in Example 2, except that the lens of the arcuate pillar having a width of 10cm, a length of 10cm, a thickness of 0.02mm on one side of the substrate 0.03mm thick, an arcuate diameter of 0.04mm and a column length of 10cm Patterning was made with a space of 0.004 mm between the shapes.

On the other side of the substrate, an optical structure was manufactured by patterning a circular light absorber having a diameter of 0.017 mm at a focus portion where light is collected by a lens shape.

The lens shape of the arcuate pillar for collecting light incident from the light absorber side between the light absorbers is further patterned, and the lens shape of the patterned arcuate pillar is further the same as above (Fig. 3).

Example 7

In the same manner as in Example 2, 10cm in width, 10cm in length and 0.02mm in thickness on one side of the substrate in the transverse direction of the substrate thickness of 0.03mm, the cross section of the arcuate column and the arcuate diameter of 0.04mm, The shape of the lens in the shape of a portion of a column having a column length of 10 cm was patterned. Lens shapes in the shape of a portion of the circumference were patterned with a space of 0.004 mm.

On the other side of the substrate, an optical structure in which a light absorber having a width of 0.004 mm and a length of 10 cm was patterned at a focal point where light is collected by the lens shape (embossed) of the arcuate pillar.

Between the light absorbers, a cross section for collecting light incident from the light absorber side is an arcuate pillar and a lens shape in the shape of a portion of the circumference is further patterned, and the patterned cross section is an arcuate pillar and a portion of the circumference The lens shape in the shape was the same as above.

Example 8

In the same manner as in Example 2, 10cm in width, 10cm in length and 0.02mm in thickness on one side of the substrate in the transverse direction of the substrate thickness of 0.03mm, the cross section of the arcuate column and the arcuate diameter of 0.04mm, The shape of the lens in the shape of a portion of a column having a column length of 10 cm was patterned. Lens shapes in the shape of a portion of the circumference were patterned with space. The space was engraved with the shape of an arcuate column with a diameter of 0.004 mm and a column length of 0.002 mm.

On the other side of the substrate, an optical structure in which a light absorber having a width of 0.004 mm and a length of 10 cm was patterned at a focal point where light is collected by the lens shape (embossed) of the arcuate pillar.

Between the light absorbers, a cross section for collecting light incident from the light absorber side is an arcuate pillar and a lens shape in the shape of a portion of the circumference is further patterned, and the patterned cross section is an arcuate pillar and a portion of the circumference The shape of the lens having the shape was the same as above (Fig. 4).

Experimental Example

Light perpendicular to the substrate was irradiated to the lens-shaped pattern side and the light absorber side of the optical structure prepared in Examples 2 to 8, respectively.

As a result, light incident on the lens pattern side was collected by the lens shape, and the collected light was absorbed by the light absorber. In addition, the light incident on the light absorber side was incident to portions except the light absorber and transmitted through the lens shape.

Specifically, in the optical structures of Examples 2 and 3, light incident on the light absorber side is incident on a portion excluding the light absorber, which is transmitted by the lens shape while being refracted by the lens shape.

In the optical structures of Examples 4, 6, and 7, light incident on the light absorber side is incident on the lens shape formed between the light absorbers, and the incident light is collected in the plate structure of the lens shape on the lens pattern side, and then transmitted. It was.

In the optical structures of Examples 5 and 8, light incident on the light absorber side was incident on the lens shape formed between the light absorbers, and the incident light was collected in the lens structure on the lens shape pattern side and transmitted thereafter. At this time, the light emitted to the lens formation pattern side represented light perpendicular to the groove structure.

In addition, it can be seen that the embodiment in which the lens shape is patterned on the substrate and the patterned embodiment in which the lens shape is a part of the circumference are almost similar in the transmission and absorption of light.

1: lens shape 3: light absorber
10 lens portion 20 substrate
30: light absorbing part
11 Lens Shape Pattern 31 Light Absorber Pattern

Claims (10)

An optical unit comprising a lens unit and a light absorbing unit for absorbing light collected by the lens unit.
The optical unit of claim 1, wherein the light absorbing portion is formed in a focus region of light passing through the lens.
The optical unit of claim 1, wherein the lens unit has a hemispherical shape or some form of an egg formed on the substrate, or an arcuate pillar formed on the substrate.
The optical unit of claim 1, wherein the lens portion has a refractive index of greater than one.
An optical structure in which a lens shape is patterned on one side of a substrate and a light absorber is patterned on the other side to absorb light collected by the lens shape.
The optical structure of claim 5, wherein the light absorber is formed in a focus region of light passing through the lens shape.
The optical structure according to claim 5, wherein a lens shape for collecting light incident on the light absorber side is further patterned between the light absorbers.
The optical structure of claim 7, wherein a groove or plate structure is formed in a focus region of light passing through the lens shape.
The optical structure according to claim 5 or 7, wherein the lens shape is hemispherical or part of an egg or an arcuate pillar.
The optical structure of claim 5, wherein the substrate has a refractive index greater than one.

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