WO2006137623A1 - Flexible backlight unit - Google Patents
Flexible backlight unit Download PDFInfo
- Publication number
- WO2006137623A1 WO2006137623A1 PCT/KR2005/003539 KR2005003539W WO2006137623A1 WO 2006137623 A1 WO2006137623 A1 WO 2006137623A1 KR 2005003539 W KR2005003539 W KR 2005003539W WO 2006137623 A1 WO2006137623 A1 WO 2006137623A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- light guide
- guide panel
- flexible
- backlight unit
- pcb
- Prior art date
Links
Classifications
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133305—Flexible substrates, e.g. plastics, organic film
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0081—Mechanical or electrical aspects of the light guide and light source in the lighting device peculiar to the adaptation to planar light guides, e.g. concerning packaging
- G02B6/0086—Positioning aspects
- G02B6/0091—Positioning aspects of the light source relative to the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133603—Direct backlight with LEDs
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
- G02F1/133608—Direct backlight including particular frames or supporting means
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F21/00—Mobile visual advertising
- G09F21/02—Mobile visual advertising by a carrier person or animal
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F21/00—Mobile visual advertising
- G09F21/04—Mobile visual advertising by land vehicles
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09F9/00—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements
- G09F9/30—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements
- G09F9/33—Indicating arrangements for variable information in which the information is built-up on a support by selection or combination of individual elements in which the desired character or characters are formed by combining individual elements being semiconductor devices, e.g. diodes
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/0036—2-D arrangement of prisms, protrusions, indentations or roughened surfaces
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0033—Means for improving the coupling-out of light from the light guide
- G02B6/0035—Means for improving the coupling-out of light from the light guide provided on the surface of the light guide or in the bulk of it
- G02B6/004—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles
- G02B6/0043—Scattering dots or dot-like elements, e.g. microbeads, scattering particles, nanoparticles provided on the surface of the light guide
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/0001—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems
- G02B6/0011—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form
- G02B6/0066—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings specially adapted for lighting devices or systems the light guides being planar or of plate-like form characterised by the light source being coupled to the light guide
- G02B6/0068—Arrangements of plural sources, e.g. multi-colour light sources
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K1/00—Printed circuits
- H05K1/18—Printed circuits structurally associated with non-printed electric components
- H05K1/189—Printed circuits structurally associated with non-printed electric components characterised by the use of a flexible or folded printed circuit
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K3/00—Apparatus or processes for manufacturing printed circuits
- H05K3/0058—Laminating printed circuit boards onto other substrates, e.g. metallic substrates
Definitions
- the present invention relates to a flexible backlight unit, and more particularly to a flexible backlight unit having a light guide panel made of soft synthetic resin material to make free flexural deformation and having a flexible PCB provided with a plurality of light emitting diodes (LEDs) as a light source, thus being applicable in a wide variety of areas as effective advertisement and display means.
- a flexible backlight unit having a light guide panel made of soft synthetic resin material to make free flexural deformation and having a flexible PCB provided with a plurality of light emitting diodes (LEDs) as a light source, thus being applicable in a wide variety of areas as effective advertisement and display means.
- LEDs light emitting diodes
- a backlight unit is generally used for advertisement, illumination, LCD, exhibition lighting, decoration, etc., and comprises a light guide panel made of a transparent acrylic board and having prominences and depressions in the form of dots or grooves on one side thereof to induce refraction and scattering of light, and a light source provided at one side end of the light guide panel.
- Fig. 1 is a rear view of a conventional backlight unit (100), and Fig. 2 is a partial sectional view of Fig. 1 taken along the line A-A.
- a light source (120) for radiating light is provided at one side end of a light guide panel (110).
- the light guide panel (110) is made of translucent material, and its front side has a display film (140) attached thereto, while its backside is provided with a plurality of horizontal and vertical V-shaped grooves (112) to uniformly scatter and refract the light emitted from the light source (120) to the front side.
- the rear surface of the light guide panel (110) is covered with a reflection sheet (150) made of polyethyleneterephthalate (PET) material.
- the conventional light guide panel (110) was made of hard acrylic material, it was only fixably installed on a wall or by a stand. Thus, its application could be limited even though it showed excellent display and advertisement function.
- the light guide panel were made of flexible material, if the light source was a plurality of LEDs, there could be another problem that each of the LEDs and their respective power supply members had to be installed individually on the light guide panel, not to restrain the flexural bending of the light guide panel. This problem could deteriorate the productivity of backlight units. Thus, it has been demanded that the light source comprising a plurality of LEDs should be provided on the light guide panel efficiently.
- an object of the present invention is to provide a flexible backlight unit including a light guide panel made of soft synthetic resin material to make free flexural deformation or to be rolled, so that the flexible backlight unit can be applied in a wide variety of areas as effective advertisement and display means and it can be conveniently carried around and kept, with occupying a little space in a roll.
- Another object of the present invention is to provide a flexible backlight unit which can be independently and detachably installed to be used in various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men.
- a further object of the present invention is to provide a flexible backlight unit including a flexible PCB provided with a plurality of LEDs as a light source, so that the light source comprising the plural LEDs can be assembled with the light guide panel efficiently and the productivity of backlight units can be greatly enhanced.
- the present invention provides a flexible backlight unit comprising a flexible light guide panel made of translucent and soft synthetic resin material and having a plurality of V-shaped grooves, rugged dots or printed dots on one side thereof; a plurality of LEDs as a light source; more than one printed circuit board (PCB) provided with the LEDs and electronic elements; and a reflection sheet provided on a rear side of the light guide panel, wherein the PCB has a flat surface to be partially connected to one side surface of the light guide panel.
- PCB printed circuit board
- the PCB is made of flexible material.
- the flexible light guide panel may be provided with a detachable means, which may be a velcro fiber or an adhesive sheet attached with a release paper.
- the flexible backlight unit since the flexible backlight unit includes the light guide panel made of soft synthetic resin material, it can be flexibly deformed and rolled, and thus it can be conveniently carried and kept, with occupying a little space in a roll. [16] Further, since the flexible backlight unit can be independently provided by the detachable means, it can be applied to various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men. [17] Furthermore, according to the present invention, since the flexible backlight unit includes the flexible PCB provided with a plurality of LEDs, the light source comprising the plural LEDs can be assembled with the light guide panel efficiently and the productivity of backlight units can be greatly enhanced.
- Fig. 1 is a rear view of the conventional light guide panel
- FIG. 2 is a partial sectional view taken along the line A-A of Fig. 1 ;
- FIG. 3 is a perspective view of a backlight unit according to an embodiment of the present invention.
- Fig. 4 is a partial sectional view of Fig. 3;
- Fig. 5 is a partial sectional view of Fig. 3 according to another embodiment of the present invention
- Fig. 6 is a partial sectional view of Fig. 3 according to a further embodiment of the present invention
- Figs. 7 to 9 show examples of use of the flexible backlight unit according to the present invention
- Fig. 10 is a perspective view of a backlight unit according to a still further embodiment of the present invention.
- the present invention provides a flexible backlight unit
- (1) comprising a flexible light guide panel (10) made of translucent and soft synthetic resin material and having a plurality of V-shaped grooves (11), rugged dots or printed dots on one side thereof; a plurality of LEDs (20) as a light source; more than one printed circuit board (PCB; 30) provided with the LEDs (20) and electronic elements; and a reflection sheet (40) provided on a rear side of the light guide panel (10), wherein the PCB (30) has a flat surface (31) to be partially connected to one side surface of the light guide panel (10).
- the LEDs (20) may be directly mounted on a surface of the PCB (30) as in Fig. 4, or may be connected to the PCB (30) by means of curved connecting terminals as in Fig. 5.
- the LEDs (20) may be a SMD type (20a) with high brightness as in Fig. 4 or a general type (20b) as in Fig. 5.
- the LEDs and the PCBs may be installed on at least one lateral side of the light guide panel (10).
- the flexible light guide panel (10) is made of soft and translucent resin material so that it can be rolled up in any directions.
- the PCB (30) is preferably connected to the flexible light guide panel
- the flat surface (31) of the PCB (30) is partially covered with adhesives or provided with a double-sided adhesive tape (51).
- the PCB (30) may be connected to the flexible light guide panel
- a connecting means which is for example a piece or a rivet.
- the PCB (30) is made of soft material having flexibility. It may also be made of a thin film, which has been conventional material of PCB.
- a reflection cover (50) made of soft material, e.g., a synthetic resin sheet, may be provided to enclose the LEDs (20) and the PCB (30).
- the reflection cover (50) serves to block the loss of light from the LEDs (20) and protect the LEDs (20) and the PCB (30) from moisture or foreign substances.
- a connecting part for power supply or a battery may be accompanied with the PCB (30).
- the battery is connected to the LED light source (20) through a cable and provided separately from the light source (20). It is contained in a battery case with a switch thereon. Therefore, the backlight unit of the present invention can be independently applied to and used in the above-mentioned various areas.
- the PCB (30) has its flat surface (31) in partial contact with one side surface (13) of the flexible light guide panel (10). That is, since the flat surface (31) of the PCB (30) is connected in a parallel direction with the one side surface (13) of the flexible light guide panel (10), the PCB (30) can be freely deformed together with the flexible light guide panel (10).
- the PCB (30) can also be rolled up simultaneously.
- PCB (30) can be attached to the flexible light guide panel (10) at once, a lot of LEDs can be efficiently provided in the backlight unit of the present invention, thereby promoting productivity of backlight units.
- the flexible backlight unit (1) of the present invention can be easily applied to any structures such as automobiles having curved external surfaces. As shown in Figs. 7 to 9, it can be attached to moving objectives such as automobiles and human body, to serve as a dynamic advertising means or displaying means in the night time due to its excellent eye-catching power.
- the flexibe backlight unit (1) may be attached to the objectives by using a connecting means such as a duble-sided adhesive tape or a piece.
- a detachable means (70) may be provided to attach the panel (10) to the objectives. It may be a velcro fiber as shown in Fig. 10 or an adhesive sheet covered with a release paper. With this detachable means (70), the backlight unit (1) can be mounted on clothes or caps and can be detached for washing.
- the flexible backlight unit (1) of the present invention can be rolled up, it is convenient to keep and carry it around regardless of its size.
- the flexible backlight unit including the light guide panel made of soft synthetic resin material according to the present invention can be conveniently carried around and kept, with occupying a little space, and can be applied to various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men.
- areas e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men.
- the flexible backlight unit including the flexible PCB provided with a plurality of LEDs increases the productivity of backlight units.
Abstract
The present invention relates to a flexible backlight unit (1 ) comprising a flexibel light guide panel (10) made of translucent and soft synthetic resin material and having a plurality of V- shaped grooves (11 ), rugged dots or printed dots on one side thereof; a plurality of LEDs (20) as a light source; more than one printed circuit board (PCB) (30) provided with the LEDs (20) and electronic elements; and a reflection sheet (40) provided on a rear side of the light guide panel (10), wherein the PCB (30) has a flat surface (31 ) to be partially connected to one side surface of the light guide panel (10). Since it can make free flexural deformation, it can be applied in a wide variety of areas as effective advertisement and display means.
Description
Description
FLEXIBLE BACKLIGHT UNIT
Technical Field
[1] The present invention relates to a flexible backlight unit, and more particularly to a flexible backlight unit having a light guide panel made of soft synthetic resin material to make free flexural deformation and having a flexible PCB provided with a plurality of light emitting diodes (LEDs) as a light source, thus being applicable in a wide variety of areas as effective advertisement and display means. Background Art
[2] A backlight unit is generally used for advertisement, illumination, LCD, exhibition lighting, decoration, etc., and comprises a light guide panel made of a transparent acrylic board and having prominences and depressions in the form of dots or grooves on one side thereof to induce refraction and scattering of light, and a light source provided at one side end of the light guide panel.
[3] Fig. 1 is a rear view of a conventional backlight unit (100), and Fig. 2 is a partial sectional view of Fig. 1 taken along the line A-A.
[4] Referring to Figs. 1 and 2, a light source (120) for radiating light is provided at one side end of a light guide panel (110). The light guide panel (110) is made of translucent material, and its front side has a display film (140) attached thereto, while its backside is provided with a plurality of horizontal and vertical V-shaped grooves (112) to uniformly scatter and refract the light emitted from the light source (120) to the front side. The rear surface of the light guide panel (110) is covered with a reflection sheet (150) made of polyethyleneterephthalate (PET) material.
[5] On the backside of the conventional light guide panel (110), the intervals between two adjacent lines of the V-shaped grooves (112) from the light source (120) gradually become narrower in order to ensure uniform brightness throughout the light guide panel (110). This is because the closer to the light source (120), the less the light is lost, while the farther from the light source (120), the more light is lost. Disclosure of Invention Technical Problem
[6] However, since the conventional light guide panel (110) was made of hard acrylic material, it was only fixably installed on a wall or by a stand. Thus, its application could be limited even though it showed excellent display and advertisement function.
[7] Further, since the conventional light guide panel (110) was not flexible and could not be bent, it occupied a lot of space and it was difficult to carry around and keep the panel (110).
[8] In order to solve these problems, a flexible light guide panel could be suggested.
However, although the light guide panel were made of flexible material, if the light source was a plurality of LEDs, there could be another problem that each of the LEDs and their respective power supply members had to be installed individually on the light guide panel, not to restrain the flexural bending of the light guide panel. This problem could deteriorate the productivity of backlight units. Thus, it has been demanded that the light source comprising a plurality of LEDs should be provided on the light guide panel efficiently. Technical Solution
[9] Accordingly, an object of the present invention is to provide a flexible backlight unit including a light guide panel made of soft synthetic resin material to make free flexural deformation or to be rolled, so that the flexible backlight unit can be applied in a wide variety of areas as effective advertisement and display means and it can be conveniently carried around and kept, with occupying a little space in a roll.
[10] Another object of the present invention is to provide a flexible backlight unit which can be independently and detachably installed to be used in various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men.
[11] A further object of the present invention is to provide a flexible backlight unit including a flexible PCB provided with a plurality of LEDs as a light source, so that the light source comprising the plural LEDs can be assembled with the light guide panel efficiently and the productivity of backlight units can be greatly enhanced.
[12] In order to achieve the above objects, the present invention provides a flexible backlight unit comprising a flexible light guide panel made of translucent and soft synthetic resin material and having a plurality of V-shaped grooves, rugged dots or printed dots on one side thereof; a plurality of LEDs as a light source; more than one printed circuit board (PCB) provided with the LEDs and electronic elements; and a reflection sheet provided on a rear side of the light guide panel, wherein the PCB has a flat surface to be partially connected to one side surface of the light guide panel.
[13] The PCB is made of flexible material.
[14] In addition, the flexible light guide panel may be provided with a detachable means, which may be a velcro fiber or an adhesive sheet attached with a release paper. Advantageous Effects
[15] According to the present invention, since the flexible backlight unit includes the light guide panel made of soft synthetic resin material, it can be flexibly deformed and rolled, and thus it can be conveniently carried and kept, with occupying a little space in
a roll. [16] Further, according to the present invention, since the flexible backlight unit can be independently provided by the detachable means, it can be applied to various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men. [17] Furthermore, according to the present invention, since the flexible backlight unit includes the flexible PCB provided with a plurality of LEDs, the light source comprising the plural LEDs can be assembled with the light guide panel efficiently and the productivity of backlight units can be greatly enhanced.
Brief Description of the Drawings [18] The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention, wherein: [19] Fig. 1 is a rear view of the conventional light guide panel;
[20] Fig. 2 is a partial sectional view taken along the line A-A of Fig. 1 ;
[21] Fig. 3 is a perspective view of a backlight unit according to an embodiment of the present invention;
[22] Fig. 4 is a partial sectional view of Fig. 3;
[23] Fig. 5 is a partial sectional view of Fig. 3 according to another embodiment of the present invention; [24] Fig. 6 is a partial sectional view of Fig. 3 according to a further embodiment of the present invention; [25] Figs. 7 to 9 show examples of use of the flexible backlight unit according to the present invention; and [26] Fig. 10 is a perspective view of a backlight unit according to a still further embodiment of the present invention.
Best Mode for Carrying Out the Invention [27] Referring to Figs. 3 and 4, the present invention provides a flexible backlight unit
(1) comprising a flexible light guide panel (10) made of translucent and soft synthetic resin material and having a plurality of V-shaped grooves (11), rugged dots or printed dots on one side thereof; a plurality of LEDs (20) as a light source; more than one printed circuit board (PCB; 30) provided with the LEDs (20) and electronic elements; and a reflection sheet (40) provided on a rear side of the light guide panel (10), wherein the PCB (30) has a flat surface (31) to be partially connected to one side surface of the light guide panel (10).
Mode for the Invention
[28] The LEDs (20) may be directly mounted on a surface of the PCB (30) as in Fig. 4, or may be connected to the PCB (30) by means of curved connecting terminals as in Fig. 5.
[29] Further, the LEDs (20) may be a SMD type (20a) with high brightness as in Fig. 4 or a general type (20b) as in Fig. 5.
[30] The LEDs and the PCBs may be installed on at least one lateral side of the light guide panel (10).
[31] The flexible light guide panel (10) is made of soft and translucent resin material so that it can be rolled up in any directions.
[32] In addition, the PCB (30) is preferably connected to the flexible light guide panel
(10) by adhesion.
[33] For this purpose, the flat surface (31) of the PCB (30) is partially covered with adhesives or provided with a double-sided adhesive tape (51).
[34] As shown in Fig. 6, the PCB (30) may be connected to the flexible light guide panel
(10) by a connecting means (53), which is for example a piece or a rivet.
[35] The PCB (30) is made of soft material having flexibility. It may also be made of a thin film, which has been conventional material of PCB.
[36] Further, a reflection cover (50) made of soft material, e.g., a synthetic resin sheet, may be provided to enclose the LEDs (20) and the PCB (30). The reflection cover (50) serves to block the loss of light from the LEDs (20) and protect the LEDs (20) and the PCB (30) from moisture or foreign substances.
[37] It is also noted that a connecting part for power supply or a battery may be accompanied with the PCB (30). The battery is connected to the LED light source (20) through a cable and provided separately from the light source (20). It is contained in a battery case with a switch thereon. Therefore, the backlight unit of the present invention can be independently applied to and used in the above-mentioned various areas.
[38] According to the present invention, the PCB (30) has its flat surface (31) in partial contact with one side surface (13) of the flexible light guide panel (10). That is, since the flat surface (31) of the PCB (30) is connected in a parallel direction with the one side surface (13) of the flexible light guide panel (10), the PCB (30) can be freely deformed together with the flexible light guide panel (10).
[39] If the flexible light guide panel (10) is rolled up, the PCB (30) can also be rolled up simultaneously.
[40] Further, since the plurality of LEDs (20) can be mounted on one PCB (30) and the
PCB (30) can be attached to the flexible light guide panel (10) at once, a lot of LEDs
can be efficiently provided in the backlight unit of the present invention, thereby promoting productivity of backlight units.
[41] As described above, the flexible backlight unit (1) of the present invention can be easily applied to any structures such as automobiles having curved external surfaces. As shown in Figs. 7 to 9, it can be attached to moving objectives such as automobiles and human body, to serve as a dynamic advertising means or displaying means in the night time due to its excellent eye-catching power.
[42] In this case, the flexibe backlight unit (1) may be attached to the objectives by using a connecting means such as a duble-sided adhesive tape or a piece.
[43] On the rear side of the light guide panel (10), a detachable means (70) may be provided to attach the panel (10) to the objectives. It may be a velcro fiber as shown in Fig. 10 or an adhesive sheet covered with a release paper. With this detachable means (70), the backlight unit (1) can be mounted on clothes or caps and can be detached for washing.
[44] As mentioned above, since the flexible backlight unit (1) of the present invention can be rolled up, it is convenient to keep and carry it around regardless of its size.
[45] It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit and scope of the invention. The present invention covers the modifications and variations thereof provided they come within the scope of the appended claims and their equivalents.
Industrial Applicability
[46] The flexible backlight unit including the light guide panel made of soft synthetic resin material according to the present invention can be conveniently carried around and kept, with occupying a little space, and can be applied to various areas, e.g., banners on automobiles or delivery bags, cheering tools for night games, pickets, radiating bands or armbands worn by traffic policemen or sanitation workers in the night time and hanging billboards for sandwich men.
[47] Further, the flexible backlight unit including the flexible PCB provided with a plurality of LEDs increases the productivity of backlight units.
Claims
Claims
[1] A flexible backlight unit comprising a flexible light guide panel (10) made of translucent and soft synthetic resin material and having a plurality of V-shaped grooves (11), rugged dots or printed dots on one side thereof; a plurality of LEDs (20) as a light source; more than one printed circuit board (PCB; 30) provided with the LEDs (20) and electronic elements; and a reflection sheet (40) provided on a rear side of the light guide panel (10), wherein the PCB (30) has a flat surface (31) to be partially connected to one side surface of the light guide panel (10).
[2] The flexible backlight unit as claimed in claim 1, wherein the PCB (30) is made of flexible material.
[3] The flexible backlight unit as claimed in claim 1, wherein the flexible light guide panel (10) is provided with a detachable means (70).
[4] The flexible backlight unit as claimed in claim 3, wherein the detachable means
(71) is a velcro fiber or an adhesive sheet.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020050053771A KR100643604B1 (en) | 2005-06-22 | 2005-06-22 | Free bending backlight unit |
KR10-2005-0053771 | 2005-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006137623A1 true WO2006137623A1 (en) | 2006-12-28 |
Family
ID=37570617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/KR2005/003539 WO2006137623A1 (en) | 2005-06-22 | 2005-10-24 | Flexible backlight unit |
Country Status (2)
Country | Link |
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KR (1) | KR100643604B1 (en) |
WO (1) | WO2006137623A1 (en) |
Cited By (13)
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WO2008126053A1 (en) * | 2007-04-17 | 2008-10-23 | Koninklijke Philips Electronics N.V. | Textile light emitting device |
WO2009109034A1 (en) * | 2008-03-06 | 2009-09-11 | Rololight Corporation | Backlighting system for display |
CN101886785A (en) * | 2010-07-13 | 2010-11-17 | 上海向隆电子科技有限公司 | Light guide and adopt the backlight module of this light guide |
WO2012130759A1 (en) * | 2011-03-25 | 2012-10-04 | Osram Opto Semiconductors Gmbh | Arrangement of a light-emitting semiconductor component and an optical waveguide layer |
NL2007980C2 (en) * | 2011-12-16 | 2013-06-18 | Dqm B V Nederland | Device and method to illuminate objects. |
GB2498991A (en) * | 2012-02-02 | 2013-08-07 | Wayne Gary Shoveller | Banner with integrated illumination |
GB2526431A (en) * | 2014-04-09 | 2015-11-25 | Allister Barker | Illuminated signs |
JP6115903B1 (en) * | 2016-06-14 | 2017-04-19 | 住宅環境設備株式会社 | LED display panel and in-vehicle LED display device |
US9694744B2 (en) | 2014-09-30 | 2017-07-04 | Continental Automotive Systems, Inc. | Flexible lighting system and component illuminated by the system |
CN110364091A (en) * | 2019-07-15 | 2019-10-22 | 深圳市广艺高科技有限公司 | A kind of flexible LED automotive advertising screen and its manufacturing method |
WO2020013768A1 (en) * | 2018-07-12 | 2020-01-16 | Ozcan Israfil | An illumination system for textile products |
CN110774732A (en) * | 2019-11-04 | 2020-02-11 | 牛瑞肖 | Printing device for light guide plate |
WO2022000744A1 (en) * | 2020-06-28 | 2022-01-06 | 武汉华星光电技术有限公司 | Flexible backlight module and liquid crystal display panel |
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KR20150076005A (en) | 2013-12-26 | 2015-07-06 | 삼성디스플레이 주식회사 | Liquid crystal display |
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WO2008126053A1 (en) * | 2007-04-17 | 2008-10-23 | Koninklijke Philips Electronics N.V. | Textile light emitting device |
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WO2009109034A1 (en) * | 2008-03-06 | 2009-09-11 | Rololight Corporation | Backlighting system for display |
CN101886785A (en) * | 2010-07-13 | 2010-11-17 | 上海向隆电子科技有限公司 | Light guide and adopt the backlight module of this light guide |
WO2012130759A1 (en) * | 2011-03-25 | 2012-10-04 | Osram Opto Semiconductors Gmbh | Arrangement of a light-emitting semiconductor component and an optical waveguide layer |
NL2007980C2 (en) * | 2011-12-16 | 2013-06-18 | Dqm B V Nederland | Device and method to illuminate objects. |
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JP6115903B1 (en) * | 2016-06-14 | 2017-04-19 | 住宅環境設備株式会社 | LED display panel and in-vehicle LED display device |
JP2017224675A (en) * | 2016-06-14 | 2017-12-21 | 住宅環境設備株式会社 | LED display panel and in-vehicle LED display device |
WO2020013768A1 (en) * | 2018-07-12 | 2020-01-16 | Ozcan Israfil | An illumination system for textile products |
CN110364091A (en) * | 2019-07-15 | 2019-10-22 | 深圳市广艺高科技有限公司 | A kind of flexible LED automotive advertising screen and its manufacturing method |
CN110774732A (en) * | 2019-11-04 | 2020-02-11 | 牛瑞肖 | Printing device for light guide plate |
WO2022000744A1 (en) * | 2020-06-28 | 2022-01-06 | 武汉华星光电技术有限公司 | Flexible backlight module and liquid crystal display panel |
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