KR101452422B1 - back light unit and banner with the same - Google Patents

back light unit and banner with the same Download PDF

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Publication number
KR101452422B1
KR101452422B1 KR1020130045868A KR20130045868A KR101452422B1 KR 101452422 B1 KR101452422 B1 KR 101452422B1 KR 1020130045868 A KR1020130045868 A KR 1020130045868A KR 20130045868 A KR20130045868 A KR 20130045868A KR 101452422 B1 KR101452422 B1 KR 101452422B1
Authority
KR
South Korea
Prior art keywords
housing
opening
pair
backlight unit
reflective sheet
Prior art date
Application number
KR1020130045868A
Other languages
Korean (ko)
Inventor
김상현
이용주
Original Assignee
김상현
이용주
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 김상현, 이용주 filed Critical 김상현
Priority to KR1020130045868A priority Critical patent/KR101452422B1/en
Application granted granted Critical
Publication of KR101452422B1 publication Critical patent/KR101452422B1/en

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/20Light sources comprising attachment means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K9/00Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
    • F21K9/60Optical arrangements integrated in the light source, e.g. for improving the colour rendering index or the light extraction
    • F21K9/68Details of reflectors forming part of the light source
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F13/0413Frames or casing structures therefor
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/20Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21LIGHTING
    • F21YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00Light-generating elements of semiconductor light sources
    • F21Y2115/10Light-emitting diodes [LED]
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/04Signs, boards or panels, illuminated from behind the insignia
    • G09F2013/0418Constructional details
    • G09F2013/0422Constructional details characterised by the presence of reflectors
    • GPHYSICS
    • G09EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09FDISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F13/00Illuminated signs; Luminous advertising
    • G09F13/20Illuminated signs; Luminous advertising with luminescent surfaces or parts
    • G09F13/22Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent
    • G09F2013/222Illuminated signs; Luminous advertising with luminescent surfaces or parts electroluminescent with LEDs

Abstract

Disclosed is a backlight unit which can be used effectively for illumination of a banner or the like by simplifying the configuration so that the lightweight and low manufacturing cost can be obtained, and an illumination method of a banner using the backlight unit.
Such a backlight unit includes a box-shaped housing having a back plate, a plurality of side plates provided around the back plate, and a front surface opened by an opening; A pair of LED modules each adapted to irradiate light to opposite sides of a pair of side plates disposed so as to face each other among a plurality of the side plates; And a reflective sheet provided on an inner surface of a rear plate of the housing so as to reflect light emitted from the LED module toward the opening of the housing.
And a banner illumination method using a backlight unit is characterized in that the backlight unit is fixed to the banner so that the opening of the housing is coupled to the back surface of the specific part of the banner so that the specific part is illuminated by the backlight unit .

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit and a banner having the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backlight unit and a method of illuminating a banner using the same, and more particularly, to a backlight unit which is lightweight and has a simple structure, To a lighting method of the lighting apparatus.

Generally, a lighting effect using a backlight unit is widely used in the field of advertising. In this case, a backlight unit having a light guide plate, a housing surrounding the light guide plate, a light source for providing light to the light guide plate, and a reflection member provided on the back surface of the light guide plate is used.

In the backlight unit, light that has been emitted to the inside of the light guide plate as the power source is applied to the light source is reflected by the reflection member to be emitted toward the front side of the light guide plate, thereby illuminating the advertisement placed toward the front side of the light guide plate.

Published Patent Application No. 10-2010-0046810

However, in the case of a conventional backlight unit having a light guide plate, the installation cost of the light guide plate and the pattern processing of the light guide plate are increased, which is not economical to use for simple advertising light illumination.

Further, since the light guide plate, which is made somewhat thicker and made of acrylic or the like, increases the weight of the backlight unit, the conventional backlight unit having the light guide plate is used as a banner for lighting the banner to be built on the street, There was a difficulty in getting the banner to stand properly when installed.

An object of the present invention is to provide a backlight unit which can be effectively used for illumination of banners and the like by simplifying the structure so that the lightweight and low manufacturing cost can be obtained, .

To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described herein, there is provided a backlight unit comprising: a box-shaped housing having a back plate and a plurality of side plates provided around the back plate; A pair of LED modules each adapted to irradiate light to opposite sides of a pair of side plates disposed so as to face each other among a plurality of the side plates; And a reflective sheet provided on an inner surface of a back plate of the housing so as to reflect light emitted from the LED module toward the opening of the housing.

The LED module may include a strip-shaped substrate provided along the longitudinal direction of the side plate so as to be attached to the inner surface of the side plate of the housing, and a plurality of LEDs mounted on the substrate at predetermined intervals.

The reflective sheet may be provided so that a central portion corresponding to a pair of the LED modules is bent more convexly toward the opening so as to be closer to the opening of the housing than a portion adjacent to the LED module.

The back plate of the housing is raised so that a central portion corresponding to a pair of the LED modules is convex toward the opening of the housing, and the reflective sheet is entirely supported on the inner surface of the back plate.

A pair of protruding guide members may be interposed between the reflective sheet and the back plate of the housing to support the central portion of the reflective sheet corresponding to the LED module between the reflective sheet and the back plate.

A flange portion extending and bent outwardly of the housing may be provided around the opening of the housing.

A banner illumination method using a backlight unit according to the present invention is for illuminating a specific part of a banner by using a backlight unit. The backlight unit includes a back plate, a plurality of side surfaces A housing in the form of a box provided with a plate, the front of which is opened by an opening; A pair of LED modules each adapted to irradiate light to opposite sides of a pair of side plates disposed so as to face each other among a plurality of the side plates; And a reflection sheet provided on an inner surface of a back plate of the housing so as to reflect light emitted from the LED module toward the opening of the housing, wherein the backlight unit is arranged on the back surface of the specific portion of the banner, So that the specific region is illuminated by the backlight unit.

A flange portion extending and extending outwardly of the housing may be provided around the opening of the housing, and the housing may be attached to the back surface of the banner through the flange portion.

The flange portion may be attached to the back surface of the banner by a double-sided tape.

According to an aspect of the present invention, there is provided a backlight unit including a pair of LED modules, wherein the pair of LED modules are configured to irradiate LED light to opposite sides of a pair of side plate inner surfaces arranged to face each other in the housing .

Therefore, in the backlight unit according to the present invention, the LED light of the individual LED module is sufficiently transmitted to the adjacent area of the LED module, and the light of the pair of LED modules is scattered by overlapping in the area between the LED modules. The brightness of the light emitted to the opening side becomes uniform over the entire opening even when the diffusion plate or the like is not used.

According to the illumination method of the banner using the backlight unit according to the present invention, since the backlight unit which can obtain brightness uniformity even with only a pair of LED module and reflection sheet is simple in structure and light in structure , It is possible to effectively perform an advertising function of illuminating and highlighting a specific area of the banner in a state in which the backlight unit is easily installed in the banner.

1 is an exploded perspective view of a backlight unit according to a first embodiment of the present invention.
2 is an assembled perspective view of a backlight unit according to a first embodiment of the present invention.
3 is a sectional view of a backlight unit according to the first embodiment of the present invention.
4 is a perspective view showing a state before the backlight unit according to the first embodiment of the present invention is installed on the banner.
5 is a side view showing a state in which the backlight unit according to the first embodiment of the present invention is installed on the banner.
6 is a perspective view showing a state in which the backlight unit according to the first embodiment of the present invention is installed on the banner.
FIG. 7 is a perspective view illustrating a structure of a backlight unit according to a second embodiment of the present invention, wherein one end of the housing is cut away. FIG.
8 is a cross-sectional view of a backlight unit according to a second embodiment of the present invention.
9 is a sectional view of a backlight unit according to a third embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below are provided by way of example so that those skilled in the art can fully understand the present invention. The present invention is not limited to the embodiments described below, but may be embodied in other forms. In order to clearly explain the present invention, parts not related to the description are omitted in the drawings, and the width, length, thickness, etc. of the components may be exaggerated for convenience. Like reference numerals designate like elements throughout the specification.

1 to 3, the backlight unit A according to the first embodiment includes a back plate 11 forming a back surface of a housing 10 having an outer appearance, And the front face of the housing 10 is opened to form an opening 14. The side face plates 12, The housing 10 can be provided through the injection molding.

The opening 14 of the housing 10 is covered by the advertisement to be illuminated through the backlight unit A. The advertisement may be provided so as to adhere to the opening 14 so as to have a size corresponding to the size of the opening 14. [ The backlight unit A is attached to the advertisement 10 in such a manner that the housing 10 is fixed to the advertisement in a state in which the opening 14 is covered by a part of the back side of the advertisement for the advertisement having a larger area than the housing 10 . The advertisement may be provided through a transparent sheet or a thin synthetic resin plate on which the advertisement contents are printed.

A flange portion 15 is provided on the periphery of the opening 14 of the housing 10 so as to extend outwardly of the housing 10 in order to engage with the advertisement and the flange portion 15 is fastened with a fastening member such as a bolt A fastening hole 15a may be provided.

In the housing 10, a pair of LED modules 20 are provided as a light source. The LED module 20 is configured to include a substrate 21 that is long in a strip shape and a plurality of LEDs 22 mounted on the substrate 21 so as to be spaced apart from each other by a predetermined distance. The substrate 21 may be provided as a PCB.

The pair of LED modules 20 are installed in the housing 10 so as to irradiate LED light to the inner sides of the pair of side plates 13 arranged to face each other. The substrate 21 provided in the form of a strip has a length substantially corresponding to the length of the side plate 13 and is arranged on the inner surface of the side plate 13 adjacent to the back plate 11 along the longitudinal direction of the side plate 13 And the intervals between the LEDs 22 mounted on the respective substrates 21 are uniformly spaced as a whole.

The substrate 21 may be attached to the inner surface of the side plate 13 of the housing 10 through an adhesive or a double-sided tape, and a power line a for supplying external power may be connected to the outside of the housing 10 As shown in Fig.

A reflection sheet 30 for reflecting the light emitted from the LED module 20 toward the opening 14 of the housing 10 is provided on the inner surface of the rear plate 11 of the housing 10. [

The reflective sheet 30 is formed by coating a film fabricated by coating or vapor-depositing silver or aluminum or the like on the surface of a metal plate or synthetic resin having reflective characteristics to a size of the rear plate 11 of the housing 10 . The reflective sheet 30 may be fixed to be adhered to the inner surface of the back plate 11 through a double-faced tape or the like.

The backlight unit A configured as described above allows the light irradiated from the LED module 20 to the inside of the housing 10 by the power source to be reflected toward the opening 14 by the reflection sheet 30 and emitted to the advertisement, Water can be illuminated.

At this time, since the pair of LED modules 20 irradiate the LED light to the opposite sides, the LED light of the individual LED module 20 is sufficient for the adjacent region of the LED module 20 In the region between the pair of LED modules 20, the light of the pair of LED modules 20 is superimposed and scattered. Therefore, the backlight unit A can uniformly form the brightness of the light emitted to the opening 14 through the opening 14 even in the state where the light guide plate, the prism, the diffusion plate, and the like are not used.

Since the backlight unit A capable of achieving uniformity of brightness even with only a pair of the LED module 20 and the reflective sheet 30 is simple in structure and structurally light in weight, So that it can be installed easily.

4 and 5, when illuminating a specific part of an advertisement such as the banner 100 with the backlight unit A according to the present embodiment, the housing 10 is first placed on the banner 100 And fixed to the back surface of the specific region 101 to be illuminated.

For reference, the banner 100 is a thin sheet-like advertisement in which advertisements or promotional contents are displayed, and may be installed so as to be normally installed on the street or the entrance of the kiosk. The banner can be supported in a state of being extended through the frame 120 and the support frame 130 can be connected to the frame 120 and the weight 140 can be installed at the lower end of the support frame 130, .

The lightweight backlight unit A having the light guide plate or the prism removed therefrom is mounted on the flange portion A in a state in which the opening 14 of the housing 10 is covered by the rear surface of the specific portion 101 of the banner 100, 14 can be simply fixed to the banner 100 by a method of attaching the blanks 100 to the back surface of the banner 100 using the double-faced tape b.

The backlight unit A can be simply fixed to the banner 100 by a method of fixing the fastening member (not shown) to the fastening hole 15a of the flange portion 15 supported on the back surface of the banner 100 .

6, the specific region 101 of the banner 100 is illuminated in a plane illumination manner through the backlight unit A to illuminate the specific region 101 of the banner 100, It is possible to easily highlight the display unit 101. Of course, at this time, the specific region 101 is illuminated uniformly by the structure of the backlight unit A as a whole.

Meanwhile, in the backlight unit A according to the first embodiment, when the width of the housing 10 is wide so that the distance between the pair of LED modules 20 is excessively large, the LED light is amplified at the center of the opening The central portion of the corresponding opening 14 between the pair of LED modules 20 becomes relatively darker than the other portions and the uniformity of the luminance at the opening 14 side is likely to be lowered .

Therefore, in the backlight units B and C according to the second and third embodiments of the present invention, the reflective sheet 30 has a central portion corresponding to a pair of LED modules 20, (14) so as to be adjacent to the opening (14) of the housing (10).

The reflective sheet 30 is folded so that the central portion of the reflective sheet 30 convexly protrudes toward the opening 14. The reflective sheet 30 has a pair of LED modules 30, The light reflecting efficiency by the central portion of the reflection sheet 30 is increased by bringing the central portion corresponding to the middle portion of the reflection sheet 30 closer to the opening 14 relatively to the side of the LED module 20 adjacent to the LED module 20, To compensate for the optical amplification efficiency that can be reduced at the center of the housing 10 and thereby to improve the uniformity of the luminance at the aperture 14 side.

7 and 8, in the case of the backlight unit B according to the second embodiment, the housing 10 'includes a back plate 11', which is provided between a pair of LED modules 20, The reflective sheet 30 is supported so as to be in close contact with the inner surface of the back plate 11 'so that the center portion is convexly bent toward the opening 14 State.

As described above, the backlight unit B, which maintains the bent state of the central portion of the reflection sheet 30 through the shape of the back plate 11 'of the housing 10', does not have a separate structure for improving the luminance uniformity Therefore, it is also effective to make the configuration of the backlight unit B simple.

9 showing the structure of the backlight unit C according to the third embodiment, the reflective sheet 30 includes a reflective sheet 30 and a projecting guide member 40 interposed between the back surface of the housing 10 The central portion can be convexly bent to the opening 14 side.

The protrusion guide member 40 is provided in a bar shape having a length corresponding to the length of the housing 10 so as to be adhered in parallel with the LED module 20 to the central back plate 11 between the pair of LED modules 20 . It is preferable that the protruding guide member 40 is made of light material such as paper or styrofoam so that the weight of the backlight unit C is not excessively increased. At this time, only the opposite end portions of the protrusion guide member 40 are fixed to the inner surface of the back plate 11.

The reflective sheet 30 bending structure according to the present embodiment can be implemented in the same manner when the shape of the projecting guide member 40 is formed integrally with the back plate 11 when the housing 10 is molded.

A: Backlight unit 10: Housing
11: back plate 12, 13: side plate
14: aperture 15: flange portion
20: LED module 21: substrate
22: LED 30: reflective sheet
100: Banner 110: Advertisement

Claims (9)

  1. A box-shaped housing having a back plate and a plurality of side plates integrated with the periphery of the back plate, the housing having a front surface opened by an opening; A pair of LED modules each adapted to irradiate light to opposite sides of a pair of side plates disposed so as to face each other among a plurality of the side plates; And a reflective sheet provided on an inner surface of a back plate of the housing to reflect light emitted from the LED module toward the opening of the housing,
    Wherein the reflective sheet has a central portion corresponding to a pair of the LED modules so that the light from the LED module can reach the opening of the front surface of the housing uniformly even when the light guide plate is removed, And is provided adjacent to the opening,
    The reflective sheet is provided in the form of a thin plate flexible to enable banding,
    A pair of projecting guide members for bending the central portion of the reflective sheet corresponding to the LED module between the reflective sheet and the back plate of the housing so as to protrude toward the opening of the housing,
    Wherein the protruding guide member is integrally provided on an inner surface of a back plate of the housing during a molding process of the housing so as to be disposed in parallel with the LED module between a pair of the LED modules,
    Wherein the reflective sheet is fixed to the inner surface of the back plate only at both ends of the protruding guide member.
  2. The method according to claim 1,
    Wherein the LED module includes a strip-shaped substrate provided along a longitudinal direction of the side plate so as to be attached to the inner surface of the side plate of the housing, and a plurality of LEDs mounted on the substrate at a predetermined interval.
  3. delete
  4. delete
  5. delete
  6. The method according to claim 1,
    And a flange portion extending and bent outwardly of the housing is provided around the opening of the housing.
  7. A banner having a backlight unit such that a specific region is illuminated through a backlight unit,
    The backlight unit includes a box-shaped housing having a back plate, a plurality of side plates integrally formed around the back plate, and a front surface opened by an opening; A pair of LED modules each adapted to irradiate light to opposite sides of a pair of side plates disposed so as to face each other among a plurality of the side plates; And a reflective sheet provided on an inner surface of a back plate of the housing to reflect light emitted from the LED module toward an opening of the housing,
    Wherein the reflective sheet has a central portion corresponding to a pair of the LED modules so that the light from the LED module can reach the opening of the front surface of the housing uniformly even when the light guide plate is removed, And is provided adjacent to the opening,
    The reflective sheet is provided in the form of a thin plate flexible to enable banding,
    A pair of projecting guide members for bending the central portion of the reflective sheet corresponding to the LED module between the reflective sheet and the back plate of the housing so as to protrude toward the opening of the housing,
    Wherein the protruding guide member is integrally provided on an inner surface of a back plate of the housing during a molding process of the housing so as to be disposed in parallel with the LED module between a pair of the LED modules,
    The reflective sheet is fixed to the inner surface of the rear plate only at both ends of the protruding guide member,
    A flange portion extending and extending outwardly of the housing is provided around the opening of the housing so that an opening of the housing is coupled to a rear surface of a specific portion of the banner, And is fixed integrally to the banner as it is attached to the banner.
  8. delete
  9. delete
KR1020130045868A 2013-04-25 2013-04-25 back light unit and banner with the same KR101452422B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020130045868A KR101452422B1 (en) 2013-04-25 2013-04-25 back light unit and banner with the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020130045868A KR101452422B1 (en) 2013-04-25 2013-04-25 back light unit and banner with the same

Publications (1)

Publication Number Publication Date
KR101452422B1 true KR101452422B1 (en) 2014-10-23

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KR1020130045868A KR101452422B1 (en) 2013-04-25 2013-04-25 back light unit and banner with the same

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101569360B1 (en) * 2015-06-05 2015-11-20 강성구 LED Lighting with Reflective Sheet

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100787552B1 (en) 2007-04-03 2007-12-21 유니나 Advertizing frame signboard with color light emitting
KR20110105940A (en) * 2010-03-22 2011-09-28 한빔 주식회사 Led backlight and signboard using the same
JP2011216274A (en) 2010-03-31 2011-10-27 Panasonic Corp Backlight unit and liquid crystal display device including the same
KR20110121802A (en) * 2010-05-03 2011-11-09 보석종합건재 주식회사 Lighting signboard

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100787552B1 (en) 2007-04-03 2007-12-21 유니나 Advertizing frame signboard with color light emitting
KR20110105940A (en) * 2010-03-22 2011-09-28 한빔 주식회사 Led backlight and signboard using the same
JP2011216274A (en) 2010-03-31 2011-10-27 Panasonic Corp Backlight unit and liquid crystal display device including the same
KR20110121802A (en) * 2010-05-03 2011-11-09 보석종합건재 주식회사 Lighting signboard

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101569360B1 (en) * 2015-06-05 2015-11-20 강성구 LED Lighting with Reflective Sheet

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