KR20150002099A - Light emitting device package - Google Patents

Light emitting device package Download PDF

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Publication number
KR20150002099A
KR20150002099A KR1020130075457A KR20130075457A KR20150002099A KR 20150002099 A KR20150002099 A KR 20150002099A KR 1020130075457 A KR1020130075457 A KR 1020130075457A KR 20130075457 A KR20130075457 A KR 20130075457A KR 20150002099 A KR20150002099 A KR 20150002099A
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South Korea
Prior art keywords
light
electrode
light control
light emitting
control unit
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KR1020130075457A
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Korean (ko)
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KR101997258B1 (en
Inventor
최재훈
최영재
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엘지이노텍 주식회사
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Priority to KR1020130075457A priority Critical patent/KR101997258B1/en
Publication of KR20150002099A publication Critical patent/KR20150002099A/en
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Publication of KR101997258B1 publication Critical patent/KR101997258B1/en

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/58—Optical field-shaping elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/52—Encapsulations
    • H01L33/54—Encapsulations having a particular shape
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
    • H01L33/62—Arrangements for conducting electric current to or from the semiconductor body, e.g. lead-frames, wire-bonds or solder balls

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Computer Hardware Design (AREA)
  • Power Engineering (AREA)
  • Electroluminescent Light Sources (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

The light emitting device package includes at least one light emitting element for generating light and a plurality of light control units spaced from the light emitting element and controlling the traveling direction of light. The light control unit includes a movable lens structure for controlling light.

Description

A light emitting device package

An embodiment relates to a light emitting device package.

Researches on a light emitting device package having a light emitting element are actively underway.

The light emitting device is, for example, a semiconductor light emitting device or a semiconductor light emitting diode formed of a semiconductor material and converting electrical energy into light.

Semiconductor light emitting devices have advantages of low power consumption, semi-permanent lifetime, fast response speed, safety, and environmental friendliness compared with conventional light sources such as fluorescent lamps and incandescent lamps. Therefore, much research is underway to replace an existing light source with a semiconductor light emitting element.

Semiconductor light emitting devices are increasingly used as light sources for various lamps used in indoor and outdoor, lighting devices such as liquid crystal display devices, electric sign boards, and street lamps.

Embodiments provide a light emitting device package capable of controlling a light emitting angle.

The embodiment provides a light emitting device package with increased applicability.

According to an embodiment, a light emitting device package includes at least one light emitting element for generating light; And a plurality of light control units spaced from the light emitting element and controlling a traveling direction of the light, wherein the light control unit includes a movable lens structure for controlling the light.

According to an embodiment, a light emitting device package includes at least one light emitting element for generating light; And a plurality of light control unit groups spaced apart from each other at a different distance along the first direction from the light emitting elements,

Wherein each of the light control unit groups includes a plurality of light control units arranged in a second direction different from the first direction and the closer the distance from the light emitting element is, The number of control units is reduced.

In the embodiment, since a plurality of light control units are provided in front of the light emitting device, the traveling direction of the light generated in the light emitting device can be changed according to the user, thereby maximizing user convenience.

Embodiments can be applied to various products because the light can be changed in various directions according to the demand of the user, or the radiation angle can be adjusted by focusing or spreading of light, so that the applicability can be extended.

1 is a cross-sectional view schematically showing a light emitting device package according to a first embodiment.
2 is a cross-sectional view illustrating the light emitting device package of FIG. 1 in detail.
Fig. 3 is a view showing an electrode structure of the light control unit of Fig. 1. Fig.
FIGS. 4 to 8 are views showing a state in which light is controlled to proceed in a specific direction. FIG.
Figures 9 and 10 are circuit diagrams for moving the lens structure of Figure 1;
FIGS. 11 and 12 are views showing a shape of the lens structure of FIG. 1 being variable.
13 is a cross-sectional view schematically showing a light emitting device package according to the second embodiment.
14 is a cross-sectional view schematically showing a light emitting device package according to a third embodiment.

In describing an embodiment according to the invention, in the case of being described as being formed "above" or "below" each element, the upper (upper) or lower (lower) Directly contacted or formed such that one or more other components are disposed between the two components. Also, in the case of "upper (upper) or lower (lower)", it may include not only an upward direction but also a downward direction based on one component.

1 is a cross-sectional view schematically showing a light emitting device package according to a first embodiment.

Referring to FIG. 1, the light emitting device package 1 according to the first embodiment may include at least one light emitting device 10 and a plurality of light control units 20, 30, and 40.

Although three light control units 20, 30 and 40 are shown in the drawing, two light control units may be provided or three or more light control units may be provided.

For convenience of explanation, the following description will be made on the assumption that three light control units 20, 30, and 40 are provided, but the first embodiment is not limited thereto.

The first to third light control units 20, 30, and 40 may control the light generated from the light emitting device 10 to travel in a specific direction. In other words, the first to third light control units 20, 30, and 40 may be controlled so that light propagates in the same direction.

For example, the first to third light control units 20, 30, and 40 may control the light to proceed in the right diagonal direction (FIG. 4). For example, the first to third optical control units 20, 30, and 40 may control the light to proceed in the left diagonal direction (FIG. 5). For example, the first to third light control units 20, 30, and 40 may control the light to proceed in the forward or upward direction (FIG. 6).

Although the directions of light propagation in the first to third light control units 20, 30, and 40 are different from each other, it is not limited thereto.

For example, the first light control unit 20 is controlled so that light advances in the right diagonal direction, the second light control unit 30 is controlled so that light advances in the upward direction, and the third light control unit 40 can be controlled so that light travels in the left diagonal direction (Fig. 7). With this light control, the light can proceed intensively forward.

For example, the first light control unit 20 is controlled so that the light advances in a left diagonal direction, the second light control unit 30 is controlled so that light advances forward or upward, and the third light control The unit 40 can be controlled to proceed in the right diagonal direction (Fig. 8). By this light control, the emission angle of light (degree of spreading of light) can be further enlarged.

The first embodiment can be optimized for the light use application of the user by controlling the light provided from the light emitting element 10 to advance the light in a specific direction or to concentrate or disperse the light. For example, a user may want stronger light, light for its own use, or light for a neighbor to use. This user's request can be made possible by the light control according to the first embodiment.

The first through third light control units 20, 30, and 40 may be disposed to be spaced apart from each other, but the present invention is not limited thereto.

Although not shown, the first to third light control units 20, 30, and 40 may be arranged to be in contact with each other.

Although not shown, the bodies 21, 31 and 41 of the first to third light control units 20, 30 and 40 may be integrally formed with each other, but the present invention is not limited thereto.

The first to third light control units 20, 30, and 40 may be arranged in parallel in one direction, for example, a horizontal direction, but the present invention is not limited thereto. In this case, the distance between the first or third light control unit 20, 40 and the light emitting element 10 may be larger than the distance between the second light control unit 30 and the light emitting element 10 , But this is not limitative.

The second light control unit 30 may be disposed on the same line as the light emitting device 10, but the present invention is not limited thereto. A central region of the light emitting device 10 and a central region of the second light control unit 30 may be positioned on a virtual vertical line.

The first light control unit 20 and the third light control unit 40 may be equally spaced from the second light control unit 30 but are not limited thereto.

The first through third light control units 20, 30, and 40 may be formed of a light transmitting material through which light can be transmitted, but the present invention is not limited thereto.

The light emitting device package 1 according to the first embodiment may further include the substrate 3, the first and second electrode layers 5 and 7, and the optical member 12, but the present invention is not limited thereto.

The light emitting device package 1 according to the first embodiment may be a chip on board (COB) or a chip on film (COF) type light emitting device package, but the present invention is not limited thereto.

The substrate 3 may be electrically connected to the light emitting device 10 while supporting the light emitting device 10 and the first to third light control units 20, 30 and 40. The substrate 3 may include one of a resin substrate such as silicon, a PCB substrate, a metal substrate, and a plastic substrate, but the present invention is not limited thereto.

The first and second electrode layers 5 and 7 may be formed on the substrate 3. Although not shown, the first and second electrode layers 5 and 7 may be covered by a protective layer having an excellent insulating property to prevent exposure of the first and second electrode layers 5 and 7, Not limited. The protective layer is for protecting the first and second electrode layers 5 and 7 from the outside, and may include, but is not limited to, an inorganic insulating material such as SiO x , an organic insulating material, or a plastic insulating material .

The first and second electrode layers 5 and 7 may be electrically connected to the light emitting device 10 to supply power to the light emitting device 10.

Although not shown, the first and second electrode layers 5 and 7 may be electrically connected to a plurality of light emitting devices 10. Although not shown, each of the first and second electrode layers 5 and 7 is electrically connected to one light emitting element of the plurality of light emitting elements 10 and to another light emitting element, The light emitting elements may be connected to each other in series.

The method of mounting the light emitting device 10 on the first and second electrode layers 5 and 7 may differ depending on the type of the light emitting device 10. The light emitting device 10 may be one of a lateral type light emitting device, a flip-chip type light emitting device, and a vertical type light emitting device, but the present invention is not limited thereto. For example, in the horizontal type light emitting device, one side of the horizontal type light emitting device is electrically connected to the first electrode layer 5 using a first wire, and the other side of the horizontal type light emitting device is connected to the Electrode layer 7, as shown in FIG. For example, in the case of the flip chip type light emitting device, one side of the flip chip type light emitting device may be attached to the first electrode layer 5 and the other side of the flip chip type light emitting device may be attached to the second electrode layer 7. In other words, the flip chip type light emitting element may not use a wire. 1, in the case of the vertical type light emitting device, one side of the vertical type light emitting device is electrically connected to the first electrode layer 5 using a wire, the other side of the vertical type light emitting device is connected to the second electrode layer 5, (7).

An optical member 12 may be formed on the substrate 3. The optical member 12 may be formed to surround the light emitting device 10 and the first to third light control units 20, 30 and 40. The optical member 12 can control the outgoing angle of light while protecting the light emitting element 10 from the outside. The optical member 12 may be formed on the substrate 3 after it has been processed in advance or directly on the substrate 3 with a resin material such as epoxy or silicone, I never do that.

The first to third light control units 20, 30, and 40 may be disposed at a half or less of the height of the optical member 12, but the present invention is not limited thereto.

A space layer formed as a space between the optical member 12 and the substrate 3, or a medium layer may be formed. The medium layer may be formed of epoxy or silicon having light transmittance, but it is not limited thereto.

The first to third light control units (20, 30, 40) can be fixed by the medium layer. That is, the first to third light control units 20, 30, and 40 may be embedded in the medium layer. The first to third light control units 20, 30, and 40 may be surrounded by the medium layer.

The first to third light control units 20, 30, and 40 may be formed of a material such as a frame and the like when the medium layer is not formed, that is, when a space is formed between the optical member 12 and the substrate 3. [ (Not shown), but it is not limited thereto. The fixture may be fixed to the substrate 3, and the first to third light control units 20, 30, 40 may be fixed to the fixture. Since the device should not interfere with the progress of light, it may be formed of a material having excellent light transparency such as a transparent plastic material, a transparent glass material, or a transparent resin material, but the present invention is not limited thereto.

2 is a cross-sectional view illustrating the light emitting device package of FIG. 1 in detail.

2, each of the first to third light control units 20, 30, 40 includes a body 21, 31, 41, a plurality of first electrodes 22a, 22b, 22c, 32a, 32b, 32c 42a, 42b, 42c, dielectric layers 24, 34, 44, a second electrode, and lens structures 25, 35, 45.

The body 21, 31, 41 may include recesses 23, 33, 43 removed from the upper surface thereof in a downward direction. The recesses 23, 33 and 43 may include a plurality of inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b and 43c. Although the embodiment discloses three inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b and 43c, it is not limited thereto.

The first inner surface 23a, 33a, 43a may be a flat surface formed along the imaginary horizontal direction. The second inner surface 23b, 33b, 43b may extend from one side of the first inner surface 23a, 33a, 43a and have an inclined surface with respect to the first inner surface. The third inner surfaces 23c, 33c and 43c may extend from the other sides of the first inner surfaces 23a, 33a and 43a and have inclined surfaces with respect to the first inner surfaces 23a, 33a and 43a.

The inclination angle of the second inner surface 23b, 33b, 43b and the inclination angle of the third inner surface 23c, 33c, 43c may be equal to each other, but the invention is not limited thereto. The inclination angle of the first inner surface 23a, 33a, 43a may be approximately 10 [deg.] To 50 [deg.]. Specifically, the inclination angles of the first inner surfaces 23a, 33a, and 43a may be approximately 20 to 40 degrees, but the present invention is not limited thereto. The inclination angle of the second inner surface 23b, 33b, 43b may be approximately 10 ° to 50 °. Specifically, the inclination angles of the second inner surfaces 23b, 33b, and 43b may be approximately 20 to 40 degrees, but the present invention is not limited thereto.

The second inner surfaces 23b, 33b and 43b and the third inner surfaces 23c, 33c and 43c are symmetrical with respect to a virtual vertical line crossing the central region of the first inner surfaces 23a, 33a and 43a. But it is not limited thereto.

The rear surfaces of the bodies 21, 31, and 41 may have surfaces parallel to the first inner surfaces 23a, 33a, and 43a, but the present invention is not limited thereto.

Although not shown, the back surface of each of the first and third light control units 20 and 40 may have a surface perpendicular to the light propagating direction of the light emitting element 10, but the present invention is not limited thereto. In this case, the light generated from the light emitting element 10 is mainly incident into the inside of the bodies 21 and 41 by the back surfaces of the first and third light control units 20 and 40, You can reduce it as much as possible.

The bodies 21, 31, and 41 may be formed of a material having excellent light transmittance and strength. The bodies 21, 31, and 41 may be formed of a transparent plastic material, a glass material, a quartz material, or a transparent resin material, but the present invention is not limited thereto.

The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b and 42c are connected to the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, Lt; / RTI > For example, the first light control unit 20 is provided with three first electrodes 22a, 22b, and 22c, and one of the first electrodes 22a is formed on the first inner surface 23a Another first electrode 22b may be formed on the second inner surface 23b and another first electrode 22c may be formed on the third inner surface 23c.

The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, and 42c formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, Can be spaced apart from one another. The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, and 42c formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, Can be driven independently. That is, the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, And 42c can be supplied with power independently of each other.

The dielectric layers 24, 34, and 44 may be formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, and 43c. The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c may be covered by the dielectric layers 24, 34, The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, and 42c formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, The dielectric layers 24, 34, and 44 may be formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b,

The dielectric layers 24, 34, and 44 may have a function of charging electric charges on the upper and lower surfaces thereof and a function of making the upper surface hydrophobic. The dielectric layers 24, 34, and 44 may include, for example, a silicon-based material, a Teflon-based material, or an epoxy-based material.

Although not shown, the dielectric layers 24, 34, and 44 are not in contact with the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, And may be formed on the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c formed on the inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, However, this is not limitative. In this case, the dielectric layers 24, 34 and 44 formed on the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b and 42c may be separated or spaced from each other.

In other words, the dielectric layers 24, 34, and 44 are formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c formed on the first electrodes 22a, 22b, 23c, 33a, 33b, 33c, 43a, 43b, 43c.

The dielectric layers 24, 34 and 44 are formed of first electrodes 22a, 22b, 22c, and 32a formed on the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c, 42b, 42c, 42a, 42b, 42c of the dielectric layers 24, 42c, but it is not limited thereto.

The lens structures 25, 35 and 45 may be formed in a part of the dielectric layers 24, 34 and 44. The lens structures 25, 35 and 45 can be moved. For example, the lens structures 25, 35, and 45 may be formed on the dielectric layers 24, 34, and 44 corresponding to the first inner surfaces 23a, 33a, and 43a, 24, 34, 44). For example, the lens structures 25, 35, and 45 may be formed on the dielectric layers 24, 34, and 44 corresponding to the first inner surfaces 23a, 33a, and 43a, 24, 34, 44).

If the dielectric layer 24, 34, 44 is not formed of a material having a hydrophobic property, a hydrophobic property different from that of the dielectric layer 23, 24, 44 is formed on all or a part of the upper surface of the dielectric layer 24, Can be formed. The hydrophobic region may be formed through a surface treatment process, but the present invention is not limited thereto. For example, a hydrophobic region may be formed in a portion of the upper surface of the dielectric layers 24, 34, and 44 corresponding to the first inner surfaces 23a, 33a, and 43a. In this case, the lens structures 25, 35, 45 may be attached to the hydrophobic areas.

The hydrophobic region allows the lens structures 25, 35 and 45 to be fixed only on the dielectric corresponding to the first inner surfaces 23a, 33a and 43a and to be covered by the dielectric layer 24 corresponding to the second inner surfaces 23b, 33b and 43b 34, 44 corresponding to the first, inner, third, inner surfaces 23, 34, 44 and / or the third inner surface 23c, 33c, 43c.

The surface energy of the hydrophobic region may be such that the lens structure 25, 35, 45 is attached to the dielectric. Generally, the lower the surface energy, the more hydrophobic it can be expressed. Therefore, the surface energy of the hydrophobic region may be low, but it is not limited thereto.

The lens structures 25, 35, and 45 may be attached to hydrophobic regions formed on the upper surfaces of the dielectric layers 24, 34, and 44. For example, the lens structures 25, 35, and 45 may be formed on the dielectric layers 24, 34, and 44 corresponding to the first inner surfaces 23a, 33a, and 43a, 35, and 45 by hydrophobic regions formed on the upper surfaces of the dielectric layers 24, 34, and 44 corresponding to the second inner surfaces 23b, 33b, and 43b even if the lens structures 25, 35, May be attached to the dielectric layer (24, 34, 44).

The lens structures 25, 35 and 45 may include any one of electrolyte materials such as sodium hydroxide (NaOH), sodium chloride (NaCl), and sodium nitrate (NaNO 3 ).

The lens structures 25, 35, 45 may have a height ranging from 0.1 mm to 2.6 mm. The volume of the lens structures 25, 35 and 45 becomes larger when the voltage is applied and the lens structures 25, 35 and 45 become larger than 2.6 mm, The lens structures 25, 35 and 45 can be separated from the dielectric layers 24, 34, and 44. As a result,

The lens structures 25, 35 and 45 are designed to minimize the volume so as to increase the adhesion with the dielectric layers 24, 34 and 44 so that the lens structures 25, 34, 44).

The second electrode may include an electrode pad (FIG. 3) and electrode lines 26, 36 and 46.

The electrode pad may be formed on the inner surface of any one of the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, and 43c. For example, the electrode pad may be formed on the first inner surface 23a, 33a, 43a, but the invention is not limited thereto.

As shown in FIG. 3, in the first light control unit 20, the electrode pad may be formed adjacent to the first electrode 22a at the first inner surface 23a. Since the electrode pad of the second electrode is electrically insulated from the first electrode 22a, the electrode pad of the second electrode may be spaced apart from the first electrode 22a.

The dielectric layers 24, 34, and 44 may be formed on portions of the first to third inner surfaces 23a, 23b, and 23c. One end of each of the dielectric layers 24, 34, and 44 may be disposed between the electrode pad of the second electrode and the first electrode 22a, but the present invention is not limited thereto. That is, the dielectric layers 24, 34, and 44 are formed to cover the first electrode 22a, but may be spaced apart from the electrode pad of the second electrode.

One side of the electrode lines 26, 36 and 46 may be electrically connected to the electrode pad and the other side of the electrode lines 26, 36 and 46 may be disposed in the lens structures 25, 35 and 45 .

The electrode lines 26, 36, and 46 may include a first line region extending from the electrode pad at a first height in an upward direction, and a second line region extending from the first line region in the horizontal direction to the lens structures 25, 35, 45) and a third line area extending into the lens structure (25, 35, 45) with a second height downward from the second line area have.

The first height of the first line region may be at least higher than the height of the lens structure (25, 35, 45).

The first height of the first line area may be greater than the second height of the third line area.

The electrode lines 26, 36, and 46 are bent in two places, but the present invention is not limited thereto. That is, the electrode lines 26, 36, and 46 may have a curved shape between one side of the electrode lines 26, 36, and 46 and the other side of the electrode lines 26, 36, and 46.

One of the electrode lines 26, 36 and 46 is electrically connected to the electrode pad and the other electrode structure is connected to the lens structure 25 , 35, 45). Therefore, the shape between one side of the electrode lines 26, 36, 46 and the other side of the electrode lines 26, 36, 46 may be curved or curved.

The other side of the electrode lines 26, 36, 46, that is, the end of the third line region, may be located in the lens structures 25, 35, 45. Since the shapes of the lens structures 25, 35 and 45 are variable, the height of the lens structures 25, 35 and 45 can also be varied. Nevertheless, the end of the third line region must be located in the lens structure (25, 35, 45).

The third line region of the electrode lines 26, 36, 46 includes first to third electrode tips 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c . The first to third front ends 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c and the first to third inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, The first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c formed on the electrodes 43a, 43b, 43c may be arranged to face each other.

Each of the front ends 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c may be arranged to face the inner surfaces 23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, have. For example, the first electrode ends 26a, 36a, 46a of the electrode lines 26, 36, 46 are arranged to face the first inner surfaces 23a, 33a, 43a of the bodies 21, 31, 41 And the second electrode ends 26b, 36b and 46b of the electrode lines 26, 36 and 46 are arranged to face the second inner surfaces 23b, 33b and 43b of the bodies 21, 31 and 41, The third electrode ends 26c, 36c and 46c of the electrode lines 26, 36 and 46 may be arranged to face the third inner surfaces 23c, 33c and 43c of the bodies 21, 31 and 41 .

The first to third electrode tips 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b and 46c of the electrode lines 26, 36 and 46 are connected to the upper surfaces of the dielectric layers 24, 35, 45, when the height of the lens structures 25, 35, 45 is defined as a reference. Specifically, the first to third extremities 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c of the electrode lines 26, 36, 46 are connected to the lens structures 25, , But is not limited thereto.

The first to third electrode tips 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c of the electrode lines 26, 36, 46 are arranged on the upper surfaces of the dielectric layers 24, Charge is not charged on the upper surfaces of the dielectric layers 24, 34 and 44 in contact with the lens structures 25, 35 and 45 and only the first to third electrodes 26, 36 and 46 of the electrode lines 26, Charge can be locally charged only on the upper surfaces of the dielectric layers 24, 34, 44 at which the ends contact the extreme ends 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c. In this case, even if power is applied to the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c and the second electrode, the lens structures 25, 35, none.

The first to third extremities 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b and 46c of the electrode lines 26, 26b, 26c, and 36a of the electrode lines 26, 36, and 46 when the shapes of the lens structures 25, 35, and 45 are varied, , 36b, 36c, 46a, 46b, 46c may be located outside the lens structures 25, 35, 45. In this case, the first to third extremities 26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c of the electrode lines 26, 36, 46 are connected to the lens structures 25, So that the power source may not be supplied to the lens structures 25, 35, and 45.

Since the electrode lines 26, 36, and 46 must withstand the impact and supply power, they can be formed of a metal material having high strength. As such a metal material, one of titanium (Ti), chromium (Cr), tungsten (W), molybdenum (Mo) and copper-tungsten (Cu-W) or an alloy thereof may be used.

The electrode pad may be formed of the same material as the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, and 42c, for example, a transparent conductive material.

The electrode pad of the second electrode and the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, and 42c may be formed of a transparent conductive material. As the transparent conductive material, ITO, IZO (In-ZnO), GZO (Ga-ZnO), AZO (Al-ZnO), AGZO (Al- Ga ZnO), IGZO RuOx / ITO, Ni / IrOx / Au, and Ni / IrOx / Au / ITO. However, the present invention is not limited thereto.

Therefore, the light transmitted through the body 21, 31, 41 is transmitted through the first electrodes 22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c and / can do.

The electrode lines 26, 36 and 46 may be formed of the same or different materials as the electrode pads. For example, the electrode lines 26, 36, and 46 and the electrode pad may be formed of a transparent conductive material. For example, the electrode pad may be formed of a transparent conductive material, and the electrode lines 26, 36, and 46 may be formed of a metal material.

For example, since the second electrode lines 26, 36, and 46 must be resistant to impact and supply power, they can be formed of a metal material having excellent strength. As such a metal material, one of titanium (Ti), chromium (Cr), tungsten (W), molybdenum (Mo) and copper-tungsten (Cu-W) or an alloy thereof may be used.

The diameters of the electrode lines (26, 36, 46) are preferably smaller so as not to interfere with the progress of the light. For example, the diameter of the electrode lines 26, 36, 46 may have a nanoscale size of about 50 nm to 1 um. Specifically, the diameters of the electrode lines 26, 36, and 46 may be approximately 100 nm to 350 nm, but the present invention is not limited thereto.

Figures 9 and 10 are circuit diagrams for moving the lens structure of Figure 1; 9 is a diagram showing the relationship between the first electrode 22a formed on the first inner surface 23a of the body 21, 31 and 41 and the first electrode terminal 26a of the second electrode in the first light control unit 20 The lens structure 25 is positioned, that is, before the lens structure 25 is moved. 10 shows a case where the lens structure 25 is located between the second electrode terminal 26b of the second electrode and the first electrode 22a formed on the second inner surface 23b of the body 21, That is, after the lens structure 25 has been moved.

One of the first electrodes 22a, 22b and 22c formed on each of the first to third inner surfaces 23a, 23b and 23c and one of the first to third extremes 26a, 26b and 26c of the second electrode The lens structure 25 can be positioned.

For example, as shown in FIG. 9, the lens structure 25 may be positioned between the first electrode 22a formed on the first inner surface 23a and the first electrode terminal 26a of the second electrode 23a. have.

First to third power sources and first to third switches are provided between each of the first electrodes 22a, 22b, and 22c formed on the first to third inner surfaces 23a, 23b, and 23c, respectively, Can be installed.

For example, a first power source and a first switch may be provided between the first electrode 22a formed on the first inner surface 23a and the second electrode. The first power source and the first switch may be connected in series.

For example, a second power source and a second switch may be provided between the first electrode 22b formed on the second inner surface 23b and the second electrode. The second power source and the second switch may be connected in series.

For example, a third power source and a third switch may be provided between the first electrode 22c formed on the third inner surface 23c and the second electrode. The second power source and the third switch may be connected in series.

10, when the second switch is turned on, the voltage (or current) of the second power source is applied to the first electrode 22b formed on the second inner surface 23b and the second electrode 22b have. Due to the voltage of the second power source, the lens structure 25 has the lens structure 25 positioned between the first electrode 22a formed on the first inner surface 23a and the first electrode terminal 26a of the second electrode, (25) may be moved and positioned between the first electrode (22b) formed on the second inner surface (23b) and the second electrode.

Although not shown, when the third switch is turned on, the voltage (or current) of the third power source may be applied to the first electrode 22c formed on the third inner surface 23c and the second electrode. Due to the voltage of the third power source, the lens structure 25 has the lens structure 25 positioned between the first electrode 22a formed on the first inner surface 23a and the first electrode terminal 26a of the second electrode, The second electrode 25 may be moved and positioned between the first electrode 22c formed on the third inner surface 23c and the second electrode.

The shapes of the lens structures 25, 35, and 45 may vary depending on the voltage (or current). That is, the diameter and / or height of the lens structures 25, 35, and 45 may vary depending on the voltage.

11 and 12 illustrate the first light control unit 20 as an example.

11, when no voltage is applied to the lens structure 25, the first diameter D1 of the lens structure 25 is smaller than the diameter D3 of the dielectric layer 24 and / And may be smaller than the diameter D4 of the second electrode. The first diameter D1 of the lens structure 25 indicates the maximum diameter of the lens structure 25 and may be a diameter in an intermediate region of the lens structure 25, Do not. The first diameter D1 of the lens structure 25 may be 5 mm or less, but the present invention is not limited thereto. If the lens structure 25 occupies 5 mm or more, the occupied area becomes large, so that the total size of the light emitting device package 1 according to the first embodiment becomes large.

The second diameter D2 of the backside of the lens structure 25 in contact with the dielectric layer 24 may be less than the first diameter D1 of the lens structure 25. [

When no voltage is applied to the lens structure 25, light traveling to the lens structure 25 may be shrunk and emitted. In other words, the light of the lens structure 25 may have a relatively narrow radiation angle.

12, the electrolyte material of the lens structure 25 is dissociated as a voltage is applied to generate positive and negative (+) and negative (-) charges. Negative (-) charges are applied to the upper surface of the dielectric layer 24 And the positive charge (+) can be charged on the inner surface of the upper portion of the lens structure 25. A positive charge (+) may be charged on the lower surface of the dielectric layer 24.

As the voltage increases, a negative charge (-) and a positive charge (+) are charged in a wider size of the upper and lower surfaces of the dielectric layer 24, and a negative charge (-) charged on the upper surface and the lower surface of the dielectric layer 24 The side surface of the lens structure 25 spreads laterally due to the large electric power between the positive electric charges (+), so that the diameter D2 of the rear surface of the lens structure 25 becomes large. Even if the diameter D2 of the rear surface of the lens structure 25 increases, the volume of the lens structure 25 must be constant. Therefore, the height of the lens structure 25 is reduced.

The diameter D2 of the rear surface of the lens structure 25 is equal to the diameter D2 of the first electrode 22a because the diameter D2 of the rear surface of the lens structure 25 is equal to the diameter D4 of the first electrode 22a at the maximum. Can be determined by the diameter (D4) of the outer tube (22a). That is, no matter how much the voltage is increased, a negative charge (-) and a positive charge (+) are charged on the upper and lower surfaces of the dielectric layer 24 only by the diameter D4 of the first electrode 22a, The maximum diameter D2 of the first electrode 22a may be substantially the diameter D4 of the first electrode 22a or may be smaller than the diameter D3 of the dielectric layer 24. [

The diameter D2 of the rear surface of the lens structure 25 which contacts the dielectric layer 24 is increased when a voltage is applied to the lens structure 25 so that the diameter D4 of the first electrode 22a increases, But it is not limited thereto. The maximum diameter D2 of the rear surface of the lens structure 25 may be the diameter D4 of the first electrode 22a.

The diameter D2 of the rear surface of the lens structure 25 may be smaller than the diameter D3 of the dielectric layer 24. [

The diameter D1 in the middle region of the lens structure 25 may be smaller than the diameter D2 of the back surface of the lens structure 25. [

The height of the lens structure 25 may be lowered as the voltage is applied compared to when the voltage is not applied.

In other words, as the voltage is applied to the lens structure 25, the diameter D2 of the rear surface of the lens structure 25 becomes larger as compared with when no voltage is applied to the lens structure 25, The height of the lens structure 25 can be lowered. In this case, the light traveling to the lens structure 25 is emitted so as to spread, and the radiation angle may be increased as compared to when no voltage is applied to the lens structure 25. [

Therefore, the light emitting device package 1 of the first embodiment is configured such that when no voltage is applied to the lens structures 25, 35, 45 of each light control unit 20, 30, 40, The shape of the lens structures 25, 35, and 45 can be changed to precisely control the light emission angle.

The light emitting device package 1 of the first embodiment can be freely applied to a product requiring shrinking light or a product requiring spreading light by the control of the radiation angle and the application range of the product can be expanded.

On the other hand, voltages for varying the shape of the lens structures 25, 35, and 45 and voltages for moving the lens structures 25, 35, and 45 may all be provided using the circuit diagram shown in FIG.

Each of the first to third power sources may generate a voltage that varies the shape of the lens structures 25, 35, 45 and a voltage (or current) that moves the lens structures 25, 35, 45.

For example, if the lens structure 25, 35, 45 is to be moved, the first power source may generate a first voltage for moving the lens structure 25, 35, 45. For example, in order to vary the shape of the lens structures 25, 35 and 45, the first power source may generate a second voltage to vary the lens structures 25, 35 and 45. In this case, the first voltage may be equal to or greater than the second voltage, but it is not limited thereto.

The second voltage for varying the shape of the lens structures 25, 35, and 45 may vary within a range of 0V to a first voltage.

The light emitting device package according to the first embodiment may further include the medium layers 27, 37 and 47 and the sealing structures 28, 38 and 48, but the present invention is not limited thereto.

The sealing structures 28, 38 and 48 may be spaced apart from the lens structures 25, 35 and 45. The sealing structures 28, 38 and 48 may be spaced apart from the electrode lines 26, 36 and 46 of the second electrode.

The sealing structures 28, 38 and 48 may be pre-fabricated and attached to the upper surfaces of the bodies 21, 31 and 41.

The sealing structures 28, 38 and 48 may be attached to the upper surfaces of the bodies 21, 31 and 41 so that the spaces in the sealing structures 28, 38 and 48 are sealed.

The sealing structures (28, 38, 48) may be formed of a material that is not breakable from an external impact. The sealing structures 28, 38, and 48 may be formed of an epoxy-based material or a plastic material, but the present invention is not limited thereto.

A medium layer may be formed in the space formed by the bodies 21, 31, 410 and the encapsulation structures 28, 38, 48.

The medium layer may include air or oil, but is not limited thereto. The air may have atmospheric pressure, slightly lower or slightly higher pressure, but is not limited thereto. For example, the pressure of the air may be in the range of 0.8 to 1.2 times the normal pressure. If the pressure of the air is too low, the lens structures 25, 35 and 45 may spread and the shape may be arbitrarily changed. If the air pressure is too high, the lens structures 25, 35 and 45 are contracted, May be arbitrarily changed.

In other words, the shape of the lens structures 25, 35, and 45 is not arbitrarily changed, and the shapes of the lens structures 25, 35, and 45 are not obstructed by voltage application. The pressure can be adjusted.

13 is a cross-sectional view schematically showing a light emitting device package according to the second embodiment.

The second embodiment is similar to the first embodiment except that the fourth and fifth light control units 50 and 60 are disposed between the light emitting element 10 and the first to third light control units 20, Which is almost similar to the embodiment. In the second embodiment, the same reference numerals are assigned to the components having the same function, the same type of material, and / or the same shape as those of the first embodiment, and detailed description thereof will be omitted.

Referring to FIG. 13, the light emitting device package 1A according to the second embodiment may include a substrate 3, a light emitting device 10, a first light control unit group and a second light control unit group .

The light emitting device package 1A according to the second embodiment includes the optical member 12 disposed on the substrate 3 and surrounding the light emitting device 10 and the first and second light control unit groups But is not limited thereto.

The first light control unit group may include a plurality of light control units (20, 30, 40). For example, the first light control unit group may include, but is not limited to, the first through third light control units 20, 30, and 40.

The second light control unit group may include a plurality of light control units (50, 60). For example, the second light control unit group may include, but not limited to, the fourth and fifth light control units 50 and 60. [

The number of the light control units (50, 60) included in the second light control unit group may be equal to or less than the number of the light control units (20, 30, 40) included in the first light control unit group.

For example, a central region of the light control units (50, 60) included in the second light control unit group corresponds to the adjacent light control units (20, 30, 40) included in the first light control unit group . That is, the first side area defined on the left side of the central area of the light control unit (50, 60) included in the second light control unit group is adjacent to the adjacent light control unit 20 , 30, 40), and the second side region defined on the right side of the central region of the light control unit (50, 60) included in the second light control unit group May be superimposed along the vertical direction with another light control unit of adjacent light control units (20, 30, 40) included in the first light control unit group.

The first to third light control units 20, 30, and 40 may be spaced apart from the light emitting device 10. The first to third light control units 20, 30, and 40 may be arranged in parallel in one direction, for example, a horizontal direction, but the present invention is not limited thereto. In this case, the distance between the first or third light control unit 20, 40 and the light emitting element 10 may be larger than the distance between the second light control unit 30 and the light emitting element 10 , But this is not limitative.

The fourth and fifth light control units (50, 60) may be spaced apart from the light emitting element (10). The fourth and fifth light control units 50 and 60 may be arranged in parallel along the horizontal direction. The fourth and fifth light control units 50 and 60 may be disposed between the light emitting device 10 and the first through third light control units.

The structures of the first to fifth light control units 20, 30, 40, 50, and 60 may be the same, but are not limited thereto.

The fourth and fifth light control units 50 and 60 are disposed between the light emitting element 10 and the first to third light control units 20 and 30 and 40, Not only the control units 20, 30 and 40 but also the fourth and fifth light control units 50 and 60 can control light in a specific direction so that the direction of light and the intensity of light can be controlled more precisely have.

Although the second embodiment discloses only the first and second light control unit groups, a further plurality of light control unit groups may be disposed between the second light control unit group and the light emission.

14 is a cross-sectional view schematically showing a light emitting device package according to a third embodiment.

The third embodiment is the same as the first embodiment except that the first to third light control units 20, 30, 40 are arranged so as to be spaced from the light emitting element 10 by the same or similar distance, 1 embodiment. In the third embodiment, the same reference numerals are assigned to the components having the same function, the same type of material, and / or the same shape as those of the first embodiment, and detailed description thereof will be omitted.

Referring to FIG. 14, the light emitting device package 1B according to the third embodiment may include a substrate 3, a light emitting device 10, and a plurality of light control units 20, 30, and 40.

The light emitting device package 1B according to the third embodiment includes an optical member 12 disposed on the substrate 3 and surrounding the light emitting device 10 and the plurality of light control units 20, ), But it is not limited thereto.

The light control unit may include, but is not limited to, the first through third light control units 20, 30 and 40.

The first to third light control units 20, 30 and 40 are not arranged in the horizontal direction in the same manner as in the first embodiment. That is, when the virtual first and second horizontal lines defined in the different positions are defined, the first to third light control units 20, 30, The control unit 30 may be disposed, and the first and third light control units 20 and 40 may be disposed on the second horizontal line.

The upper surfaces of the first to third light control units 20, 30, and 40 may be oriented in different directions. For example, the second light control unit 30 may be arranged to face upward or forward. The first light control unit 20 and / or the third light control unit 40 may be arranged to face diagonally.

The back surfaces of the first to third light control units 20, 30 and 40 may be arranged to be perpendicular to the traveling direction of light generated from the light emitting element 10, but the present invention is not limited thereto. For example, the back surface of the second light control unit 30 may be arranged to be perpendicular to the traveling direction of light of the light emitting element 10. [ The back surface of the first light control unit 20 may be arranged so as to be perpendicular to the traveling direction of the light of the light emitting element 10 or close to the vertical direction. The back surface of the third light control unit 40 may be arranged so as to be perpendicular to the traveling direction of light of the light emitting element 10 or close to the vertical direction.

The back surface of the first light control unit 20 and / or the back surface of the third light control unit 40 may be arranged to be inclined with respect to the second horizontal line. The inclination angle alpha of the back surface of the first light control unit 20 and / or the inclination angle beta of the back surface of the third light control unit 40 with respect to the second horizontal line is approximately 5 to 45 degrees . Specifically, the inclination angle [alpha] of the back surface of the first light control unit 200 and / or the inclination angle [beta] of the back surface of the third light control unit 40 with respect to the second horizontal line is approximately 20 to 45 The inclination angle? Of the back surface of the first light control unit 20 with respect to the second horizontal line and / or the inclination angle? Of the back surface of the third light control unit 40 with respect to the second horizontal line, The inclination angle beta of the back surface of the substrate 10 may be approximately 30 to 45 but is not limited thereto.

The first through third light control units 20, 30, and 40 may be spaced apart from the light emitting device 10 by the same distance, but the present invention is not limited thereto.

The distance between the first light control unit 20 and / or the third light control unit 40 and the light emitting element 10 is a distance between the second light control unit 30 and the light emitting element 10 But it is not limited thereto.

The arrangement structure of the first to third light control units 20, 30, and 40 according to the third embodiment can also be applied to the second embodiment.

The light emitting device package 1, 1A, 1B according to the first to third embodiments can be applied to a light unit. The light unit can be applied to a display device and a lighting device such as a lighting lamp, a traffic light, a vehicle headlight, an electric signboard, and an indicator lamp.

1, 1A, 1B: Light emitting device package
3: substrate
5, 7: electrode layer
10: Light emitting element
12: optical member
20, 30, 40, 50, 60: light control unit
21, 31, 41: Body
22a, 22b, 22c, 32a, 32b, 32c, 42a, 42b, 42c:
23, 33, 43: recess
23a, 23b, 23c, 33a, 33b, 33c, 43a, 43b, 43c:
24, 34, 44: dielectric layer
25, 35, 45: lens structure
26, 36, 46: electrode line
26a, 26b, 26c, 36a, 36b, 36c, 46a, 46b, 46c:
27, 37, 47: medium layer
28, 38, 48: encapsulation structure
29: Electrode pad
51, 53: virtual horizontal line

Claims (21)

At least one light emitting element for generating light; And
And a plurality of light control units spaced from the light emitting element and controlling a traveling direction of the light,
The light control unit includes:
And a movable lens structure for controlling the light. The method according to claim 1,
Wherein the plurality of light control units are arranged along a first direction. The method according to claim 1,
Wherein the plurality of light control units control light to proceed in different directions from each other. The method according to claim 1,
Wherein the plurality of light control units control light to travel in the same direction. The method according to claim 1,
Wherein a light control unit of one of the plurality of light control units overlaps with the light emitting element along a second direction and a distance between another light control unit adjacent to the one light control unit and the light emitting element is the light control unit Emitting element is larger than a distance between the unit and the light-emitting element. The method according to claim 1,
The light control unit includes:
A body having a recess including a plurality of inner surfaces;
A first electrode formed on the plurality of inner surfaces;
A second electrode formed on the inner surface of one of the plurality of inner surfaces;
A dielectric layer formed on the first electrode and disposed below the lens structure; And
An encapsulation structure surrounding the lens structure;
And a first medium layer formed between the sealing structures, such as the body,
Wherein the second electrode comprises:
An electrode pad formed on the one inner surface; And
An electrode line coupled to the electrode pad and positioned within the lens structure,
And the other inner surface with respect to the one inner surface has an inclined surface. The method according to claim 6,
Wherein at least one of the body, the first electrode, the electrode pad of the second electrode, and the dielectric layer includes a transparent material. The method according to claim 6,
Wherein the first electrodes formed on the plurality of inner surfaces are spaced apart from each other. The method according to claim 6,
Wherein the medium layer comprises one of air and oil. The method according to claim 1,
It said lens structure is a light emitting device package that includes any of the electrolyte material, such as sodium (NaOH), sodium chloride (NaCl) and sodium nitrate (NaNO 3) hydroxide. The method according to claim 1,
And the electrode line of the second electrode includes a plurality of electrode terminals branched from an end of the electrode line. 12. The method of claim 11,
Wherein the plurality of the electrodes and the first electrode formed on the plurality of inner surfaces are disposed to face each other,
Wherein the lens structure is disposed between a first electrode of one of the plurality of electrodes and a first electrode formed on an inner surface of one of the plurality of inner surfaces facing the first electrode. 13. The method of claim 12,
Wherein the lens structure is moved between a first electrode of the other of the plurality of electrodes and a first electrode formed on an inner surface of the other of the plurality of inner surfaces facing the other electrode. 3. The method of claim 2,
Wherein each of the plurality of light control units is disposed on a hypothetical line defined parallel to but different from the first direction. The method according to claim 1,
And the upper surfaces of each of the plurality of light control units are disposed so as to face different directions from each other. The method according to claim 1,
Wherein a back surface of each of the plurality of light control units is disposed so as to be perpendicular to a traveling direction of light of the light emitting element. 3. The method of claim 2,
Wherein a back surface of one of the plurality of light control units is disposed so as to be perpendicular to a traveling direction of light of the light emitting element,
Wherein a back surface of another light control unit among the plurality of light control units is arranged to be inclined with respect to a virtual line defined along the first direction. 18. The method of claim 17,
And the inclination angle of the back surface of the other light control unit is 5 to 45 degrees. 19. The method according to any one of claims 1 to 18,
Board; And
And an optical member disposed on the substrate and surrounding the light emitting device and the light control unit. 20. The method of claim 19,
And one of a space layer and a second medium layer formed between the substrate and the optical member. At least one light emitting element for generating light; And
And a plurality of light control unit groups spaced apart from each other at a different distance along the first direction from the light emitting elements,
Wherein each of said light control unit groups comprises a plurality of light control units arranged along a second direction different from said first direction,
Wherein the number of the plurality of light control units included in each of the light control unit groups is reduced as the distance from the light emitting element is closer.
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050071505A (en) * 2002-09-24 2005-07-07 듀크 유니버시티 Methods and apparatus for manipulating droplets by electrowetting-based techniques
KR20100133943A (en) * 2007-08-24 2010-12-22 어드밴스드 리퀴드 로직, 아이엔씨. Bead manipulations on a droplet actuator
KR20120060734A (en) * 2010-12-02 2012-06-12 가부시키가이샤 고이토 세이사꾸쇼 Vehicular headlamp
KR20120075317A (en) * 2010-12-28 2012-07-06 엘지전자 주식회사 Display apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20050071505A (en) * 2002-09-24 2005-07-07 듀크 유니버시티 Methods and apparatus for manipulating droplets by electrowetting-based techniques
KR20100133943A (en) * 2007-08-24 2010-12-22 어드밴스드 리퀴드 로직, 아이엔씨. Bead manipulations on a droplet actuator
KR20120060734A (en) * 2010-12-02 2012-06-12 가부시키가이샤 고이토 세이사꾸쇼 Vehicular headlamp
KR20120075317A (en) * 2010-12-28 2012-07-06 엘지전자 주식회사 Display apparatus

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