CN100454111C - Backlight unit capable of easily forming curved and three-dimensional shape - Google Patents
Backlight unit capable of easily forming curved and three-dimensional shape Download PDFInfo
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- CN100454111C CN100454111C CNB2006100850270A CN200610085027A CN100454111C CN 100454111 C CN100454111 C CN 100454111C CN B2006100850270 A CNB2006100850270 A CN B2006100850270A CN 200610085027 A CN200610085027 A CN 200610085027A CN 100454111 C CN100454111 C CN 100454111C
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- light guide
- groove
- heat sink
- guide panel
- light
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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
- G02F1/1335—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V29/00—Protecting lighting devices from thermal damage; Cooling or heating arrangements specially adapted for lighting devices or systems
- F21V29/50—Cooling arrangements
- F21V29/70—Cooling arrangements characterised by passive heat-dissipating elements, e.g. heat-sinks
-
- 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
- G02F1/133524—Light-guides, e.g. fibre-optic bundles, louvered or jalousie light-guides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21Y—INDEXING 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
- F21Y2115/00—Light-generating elements of semiconductor light sources
- F21Y2115/10—Light-emitting diodes [LED]
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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
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133628—Illuminating devices with cooling means
Abstract
Disclosed herein is a backlight unit capable of easily forming a curved or three- dimensional shape. The backlight unit according to the present invention comprises a light guide panel which includes a light guide plate having on one surface of both surfaces thereof a plurality of notches, an uneven dot pattern, a printed dot patter or a sanded surface, of a light diffusion plate; a luminous means which includes a lamp mounted on a PCB to emit light to the light guide panel; a groove formed along an edge of the light guide panel so that the luminous means is installed in the light guide panel; and a thin heat radiating plate fices on a back surface of the PCB along the groove.
Description
Technical field
The present invention relates to a kind of back light unit that can easily form curve or 3D shape; more specifically; relate to a kind of like this back light unit; wherein heat sink comprises that a thin plate is so that light guide panel has curve shape; even so also can be easily consistent when having curve shape with PCB (printed circuit board (PCB)) when being installed into; and this back light unit has excellent waterproofness; even thereby when this back light unit is installed under water, also can protect light-emitting device and circuit, thereby make the longest-lived of lamp.
In addition, the present invention relates to a kind of back light unit that can easily form curve or 3D shape, it is configured to make the front portion of light guide panel neatly to simplify, and all parts that comprise electric wire all are contained in the thickness of light guide panel, thereby opposing external disturbance or impact, be easy to processing, and make possibility minimum its damage.In addition, the present invention has made things convenient for packing or fitting operation, and can make the back light unit of the different shape that uses flexible PCB.
Background technology
Usually, the back light unit that is used for LCD (LCD), advertisement, illumination, territory lighting, decoration etc. comprises light guide panel, and this light guide panel comprises the acrylic panel of light-permeable or the transmittance plate of being made by the potpourri of acrylic acid and light-scattering material.Side in light guide panel is equipped with alight.The surface of light guide panel is provided with predetermined recess figure, uneven dot pattern, prints dot pattern or matte surface, thus the light path of guiding lamp or light scattering.
Fig. 1 a is the rear view of structure of expression conventional backlight unit 100, and Fig. 1 b is that the line A-A along Fig. 1 a cuts open the detailed section view of getting.
With reference to Fig. 1 a and Fig. 1 b, back light unit is constructed as follows.That is, alight 131 is arranged on the side of the light guide panel of being made by light transmissive material 110.Along continuous straight runs and vertical direction form a plurality of V-arrangement recesses 112 on the back side of light guide panel 110, thereby make the anterior evenly scattering that shows film 140 from the light of light guide panel 110 described side emissions towards being attached with of light guide panel 110.The reflector plate of being made by the PET material 150 can be adhered on the back side with V-arrangement recess of light guide panel 110.
In addition, heat sink 180 is fixed on the PCB 133 with lamp 131, and installation bracket 170 is to support lamp 131, heat sink 180 etc.
Summary of the invention
Back light unit mainly is used in the printing opacity light-emitting device of advertising equipment to satisfy company's demand (corporate demand).Yet, will produce heavy demand on consumer's the upholstery (for example, picture or photo) if back light unit is applied to.
Yet, the problem of conventional backlight unit 100 is, PCB must adhere on the heat sink 180, and carriage 170 must be fixed on the light guide panel separately with adhesive tape, screw etc., thereby the consumer is introduced and be sold to back light unit 100 to the market to have fixedly the form of the finished product of specification, thereby be difficult to the concrete needs customization back light unit according to the individual.
In addition, can not make shape except that rectangle.
In other words, with regard to the operation of the assembling of the installation of cutting light guide panel and carriage 170, light-emitting device and carriage, there are some problems in prior art, thereby is difficult to make back light unit in the expectation place.Thereby the serviceability of back light unit is less, but makes its application be restricted.
In addition, because carriage must be set separately, thus material cost increases claim for eot, and thereby the manufacturing cost of back light unit is increased.
Made by extruded aluminium owing to carriage and heat sink, they have the remarkable thickness at least about 1mm, thereby carriage and heat sink are not flexible.Therefore, when light guide panel and PCB bend to curve shape, can not make back light unit in the expectation place.And, owing to the thickness of heat sink forms step, in this case,, must provide filling material with compensation thickness difference when a large amount of loadings or when transporting back light unit, this makes troubles to manufacturer.Even when the consumer assembles this back light unit, also must compensate the step that causes by difference in thickness.
Therefore, consider the above problem that occurs in the prior art and make the present invention, and an object of the present invention is to provide a kind of back light unit that it does not need carriage fitting operation or PCB to adhere to operation, thereby has reduced manufacturing cost; And wherein heat sink comprises a thin plate, makes to be convenient to make it consistent with the light guide panel of being arranged to curve shape and PCB, and needn't compensate surface step; And wherein utilize engraving tool to form the profile and the groove of back light unit, then light source and heat sink are installed on this back light unit,, thereby provide convenience afterwards with this back light unit of rubber belt sealing in the shop.
Another object of the present invention provides a kind of back light unit, it is easy to wishing the place customization according to consumer's concrete needs, thereby satisfy demands of individuals and company's demand quickly and easily, like this but range of application is expanded to the back light unit that the individual uses, therefore make availability (accessibility) maximization, thereby cause heavy demand for the user.
A further object of the present invention provides a kind of back light unit, and it can easily form curve shape or 3D shape by vacuum forming.
For achieving the above object, the invention provides a kind of back light unit, comprise: light guide panel, it comprises a light guide plate or an astigmatism plate, has a plurality of recesses, inhomogeneous dot pattern on one or two surface of this light guide plate, prints dot pattern or matte surface; Light-emitting device, it comprises the light emitting diode on the front surface that is installed in printed circuit board (PCB); And groove, it has two sidewalls and forms along the edge at the back side of described light guide panel, this back light unit is characterised in that, between described two sidewalls of described groove, be equipped with a part and the described light-emitting device of thin heat sink, make the back side of described thin heat sink and described printed circuit board (PCB) be in direct contact with one another, and described light emitting diode directly contact with a sidewall of described groove.
Description of drawings
From below in conjunction with will more being expressly understood above and other purpose of the present invention, feature and advantage the detailed description of accompanying drawing, in the accompanying drawings:
Fig. 1 a is the rear view of the structure of the common light guide panel of expression;
Fig. 1 b is that the line A-A along Fig. 1 a cuts open the detailed section view of getting;
Fig. 2 is the exploded perspective view of expression according to the back light unit of first embodiment of the invention;
Fig. 3 is the stereographic map that the back light unit of presentation graphs 2 is in assembling back state;
Fig. 4 is the detailed section view of the vitals of expression back light unit shown in Figure 3;
Fig. 5 a to Fig. 5 g is the view corresponding to Fig. 4, represents the modification of first embodiment;
Fig. 6 is the view of expression according to the structure of the back light unit of first embodiment of the invention;
Fig. 7 is the view of expression according to the manufacture process of the back light unit of first embodiment of the invention;
Fig. 8 is the view of expression according to the manufacture process of the shaped form back light unit of first embodiment of the invention;
Fig. 9 is back light unit in use the view of expression according to first embodiment of the invention;
Figure 10 is the exploded perspective view according to the back light unit of first embodiment of the invention, has wherein omitted some parts;
Figure 11 is the stereographic map that the back light unit of Figure 10 is in assembling back state;
Figure 12 is the detailed section view of the back light unit of Figure 11, has wherein omitted some parts;
Figure 13 is the rear view of expression according to the light guide panel of the back light unit of second embodiment of the invention;
Figure 14 is the rear view of expression according to the light guide panel of the back light unit of third embodiment of the invention;
Figure 15 is the rear view of expression according to the light guide panel of the back light unit of fourth embodiment of the invention;
Figure 16 is the rear view of expression according to the back light unit of fifth embodiment of the invention;
Figure 17 is the exploded stereographic map according to the back light unit of sixth embodiment of the invention;
Figure 18 is the view of expression according to the structure of the back light unit of seventh embodiment of the invention;
Figure 19 is the partial cut-out stereographic map of expression according to the structure of the back light unit of eighth embodiment of the invention;
Figure 20 is the cut-open view according to the back light unit of ninth embodiment of the invention, has wherein omitted some parts; And
Figure 21 is the cut-open view according to the back light unit of tenth embodiment of the invention, has wherein omitted some parts.
Embodiment
Below, describe the back light unit that can easily form curve or 3D shape according to the preferred embodiment of the invention with reference to the accompanying drawings in detail.
Fig. 2 is the exploded perspective view of expression according to the back light unit of first embodiment of the invention, and Fig. 3 is the stereographic map that the back light unit of presentation graphs 2 is in assembling back state, and Fig. 4 is the detailed section view of the vitals of expression back light unit shown in Figure 3.
That is, light guide panel 10 of the present invention is included in to be had a plurality of V-arrangement recesses 11, inhomogeneous dot pattern, prints the light guide plate of dot pattern or matte surface on one or two surface, perhaps an astigmatism plate.
Can on PCB 33, form guiding groove 31a (see figure 7) with predetermined space.PCB 33 is the bar shape of Bao Erchang, and cuts into and wish that size is to be connected to electric wire.
Shown in Fig. 5 a to Fig. 5 g, thin heat sink 50 comprises a groove department of assembly 51 and an exposure portion 52 at least.Groove department of assembly 51 is assembled in the groove 13 of light guide panel 10 and comprises that PCB contact site, this groove department of assembly are formed on one or more surfaces of thin heat sink 50.The exposure portion 52 that is exposed to light guide panel 10 outside surfaces is formed on the surface of thin heat sink 50, perhaps is formed on two or three surfaces of thin heat sink 50, and should exposure portion crooked and extend to the precalculated position.
Specifically, thin heat sink 50 can form various forms, thereby as long as 51 extends each that be exposed to the outside exposure portion 52 all to be arranged at least one that approach heat sink 50 surperficial with groove department of assembly 51 in PCB 33 contact and be installed in groove 13 and from the groove department of assembly.Preferably, groove department of assembly 51 and exposure portion 52 all are formed on two or more surfaces, thereby make endotherm area and area of dissipation maximization.
In this case, preferably thin heat sink 50 comprises thin aluminum sheet.
When thin heat sink 50 (that is, thin aluminum sheet) when forming the thickness with 0.2mm to 0.4mm, this thin heat sink 50 is crooked easily, and very little from the outstanding step in the surface of light guide panel, thereby needn't compensate this step.
In addition, as shown in Figure 6, step 15a can be formed on part on light guide panel 10 outside surfaces, that extend to an end of this light guide panel from groove 13.The thickness of step 15a is corresponding with the thickness of thin heat sink 50.That is, when forming groove 13, cut away the part of light guide panel 10 with the thickness of thin heat sink 50.Thus, the whole surface of light guide panel 10 forms flat.
And light-emitting device 30 and thin heat sink 50 can not be arranged on the side of light guide panel, but can be arranged on two opposite sides, three sides or all surface.
Below, with manufacturing and the mode of operation of describing as above-mentioned structure according to back light unit 1 of the present invention.
Fig. 7 is the view of expression according to the manufacture process of back light unit 1 of the present invention.At first, as shown in Figure 7,, will comprise according to the order specification that the original light guide panel 10 of light guide plate with V-arrangement recess 11 or luminous point or astigmatism plate cuts into and wish size at step S11.At step S12, near the position light guide panel 10 ends forms groove 13, thereby light-emitting device is installed in the groove 13.
At this moment, groove 13 is sized to make LED (light emitting diode) lamp 31 and thin heat sink 50 close fit that are installed on the PCB 33 to arrive in the groove 13, and can move with wishing.
Next, at step S21, the PCB33 that with predetermined space LED lamp 31 is installed continuously on it is cut into length corresponding to groove 13, and, PCB 33 is connected to electric wire 35 at step S22.Electric wire 35 is provided with pin jack (contact jack) 35a.
In addition, at step S31, cut into length corresponding to PCB 33 with forming the long and thin heat sink 50 made of aluminum of length direction.
So, when in the groove 13 of light-emitting device 30 and thin heat sink 50 being forced be assembled to light guide panel 10, elasticity by light guide panel 10, light-emitting device 30 and thin heat sink 50 prevent light-emitting device 30 and thin heat sink 50 do not wish move, make the assembling each other securely of these parts.Like this, just easily finished manufacturing operation.
Like this, according to the present invention, do not need carriage fitting operation and PCB to adhere to operation.For example, preparing groove forming machine, saw, scissors and other simple tool, just can easily back light unit manufactured and meet the order specification in this place such as the manufacturing site location of retail location.
Therefore, by customizing manufacturing in any place, the present invention can easily satisfy individual's various demands, and company needs many demands with product of same size.
In addition, thin heat sink 50 forms thinner.Like this, as shown in Figure 8,, also in thin heat sink 50, cut out V-arrangement recess 53, thereby allow thin heat sink 50 free bends even when PCB 33 is mounted to curve form.Like this, can form the surface of contact that contacts with PCB of thin heat sink 50.
Therefore, be easy to agree with (comply with) circular or fan-shaped back light unit in desired location.Step with respect to light guide panel 10 surfaces is very little, thereby does not need to utilize filling material to carry out the step compensating operation, will carry out this operation in the prior art when loading a large amount of back light units or inserting back light unit in the framework.Thus, be convenient to back light unit is installed in the framework.
When inserting this back light unit in framework 3 under the situation that is placed with picture or demonstration film 25 on the front surface of back light unit 1 of the present invention (as shown in Figure 9), the light of LED lamp sees through light guide panel with predetermined space, illuminates picture or photo from the rear.Thereby back light unit 1 of the present invention can be used as ornament to produce unique atmosphere.
Simultaneously, only an end of the groove 13 of light guide panel 10 form import 13a with external communications, and blind end 13b is set, thereby import 13a is set a position at the other end of groove 13.Preferably, being located at formation connection groove 13e between the PCB installation portion 13c of opposite side,, electric wire 35 connects in the groove 13e so that being inserted.
Preferably, groove 13 is used to the tunica albuginea 21 that covers and reflect in the face of the surface of light guide panel 10 front portions is provided with.
The shade that is installed in the color of PCB 33 in the groove 13 and electric wire 35 and LED lamp 31 can be presented at the front surface 10a of light guide panel and show on the film 25.Yet, in groove 13 bottoms tunica albuginea 21 is installed, thereby the light of this tunica albuginea reflectoscope 31 and make PCB 33 and electric wire 35 weakens (diffuse) at light when the outside is watched.
In order to prevent that effectively moisture from entering in the groove 13, preferably import 13a is located at from the end of the bend 13d of PCB installation portion 13c bending.
As shown in figure 13, thus bend 13d can from PCB installation portion 13c only bending once have " L " shape.Yet, when bend 13d crooked twice one-tenth Z-shaped (shown in Figure 14), just prevented that electric wire 35 from being removed by external force.
In addition, on the back side of light guide panel 10, form groove 13, and light-emitting device 30 is installed in the groove 13.Then, thin heat sink 50 of order assembling and reflector plate 12.Then, will approach heat sink 15 by the zone of reflections 61 and be connected on the reflector plate 12, perhaps be connected on the light guide panel 10.In addition, import 13a is provided with airtight and watertight padding 63.
As shown in figure 15, when light guide panel 10 was rectangle, groove 13 preferably formed " U " shape along the periphery of light guide panel 10.Be equipped with the PCB 33 of LED lamp 31 to be installed on the corresponding PCB installation portion 13c, and electric wire 35 is inserted in the interconnective connection groove of the PCB installation portion 13c 13e.Preferably, connection groove 13e is narrower and shallow than each PCB installation portion 13c.
In addition, as shown in figure 16, wherein omitted the thin heat sink and the zone of reflections, when light guide panel is installed on the both sides for circular or other shape and PCB and LED lamp, has connected groove 13e PCB installation portion 13c is interconnected.Thus, connect groove 13e and PCB installation portion 13c periphery formation along light guide panel 10.
In addition, have 3D shape when light guide panel 10 forms when (seeing Figure 17 and Figure 18), be installed in PCB 33 in the groove 13 by being easy to crooked flexible PCB 33 ' constitute.But flexible PCB has good flexible and assembleability, thereby is suitable for three dimensional arrangement.
The zone of reflections 61 along the periphery setting of light guide panel 10 adopts the white glues band that is called " side band ", and this adhesive tape is generally used for preventing light loss.
On the back side of reflector plate 23 attached to light guide panel 10.
Usually utilize engraving tool to process the outside of light guide panel 10 in the plane.Process simultaneously light-emitting device 30 at grade and be installed on its interior groove 13 (seeing Figure 15 and Figure 16).
The PCB 33 that LED lamp 31 is mounted thereon with predetermined space is assembled in the groove 13 of light guide panel of formation like this, and thin heat sink 50 is installed.The airtight and watertight padding 63 that is screwed on the electric wire 35 is located on the import 13a of groove 13.Then, cover the periphery of the exposure portion of thin heat sink 50, the edge of light guide panel 10 and the groove 13 that comprises the connection groove 13e that has opened wide, carry out the waterproof sealing operation so simultaneously and approach the fixing of heat sink 50 with the zone of reflections 61.So just finished the manufacturing of back light unit.
According to the present invention of such manufacturing, only form import 13a, and utilize the zone of reflections 61 to carry out waterproof sealing operation and the fixedly operation of light-emitting device 30 and thin heat sink 50 as the external channel of groove 13 position.Therefore, the invention provides excellent waterproofness and manufacturing easily.
In other words, with rubber belt sealing the groove 13 of PCB is installed wherein at the back side of light guide panel 10b, and at import 13a place airtight and watertight padding 63 is set, or silicone is placed in the import 13a, import 13a is and unique passage of external communications that therefore thoroughly anti-sealing enters.Thereby, even back light unit is installed under water, because water proofing property can not cause any problem yet.Therefore, make life-span of light-emitting device reach maximum, but and enlarged the range of application of back light unit.
In addition, even when on the relative both sides that light-emitting device 30 are installed in light guide panel 10, be mounted in thereby electric wire 35 also can not be exposed to the outside and connect in the groove 13e sealing within it.That is, all parts all hold and are embedded in the thickness of light guide panel 10, thereby it is not sagging to make parts except that plate can not be projected into the outside yet.Thus, described back light unit can be resisted external disturbance and impact, and is easy to handle.In addition, make the impaired minimizing possibility of back light unit, and be convenient to install and load this back light unit.
Because framework or heat sink are not exposed to the outside, edge and the tunica albuginea 21 of light guide panel 10 and are installed in the groove 13, therefore the light that is installed in the LED lamp 31 in the groove 13 is reflected on the display screen, and PCB 33, LED lamp 31 and electric wire 35 can not reflect on the front surface 10a of light guide panel.Obtained clean and tidy display screen like this.
The topmost advantage of the present invention is, uses that flexible PCB 33 ' and the framework that need not to use in the prior art is freely made the back light unit with curve shape or 3D shape.Can utilize thermal deformation shaping processing that light guide panel is manufactured and have Any shape.For example, as shown in figure 18, described light guide panel can manufacture the canopy that is suitable for helicopter, and the height and the curvature of its lower end change.Like this, the flexible PCB 33 of free bend ' and the thin heat sink 50 with recess 53 be installed in the crooked groove 13, thereby can make various three-dimensional back light units.
In addition, the back side 10b of thin heat sink 50 with covering light guide panel 10 can be installed in a wider range, thereby can carry out the heat radiation operation of light-emitting device 30 effectively.Utilize the zone of reflections 61 to realize to approach heat sink 50 and be fixed to operation on the light guide panel 10.Like this, be easy to make described back light unit.
Simultaneously, as during Figure 19 is extremely embodiment illustrated in fig. 21, light guide panel 10 comprises the elongated board 10c thinner than the degree of depth of groove 13, and is to form groove 13 local adapter (adding piece) 10d that are provided with.
In this case, adapter 10d combines with elongated board 10c, thereby provides thickness for forming groove 13.Adapter 10d is made by the material that can adhere on the elongated board 10c.
That is, set up the thickness of accessory plate 10d, thereby form the groove 13 that has for enough degree of depth that PCB 33 is installed with additional elongated board 10c deficiency.Preferably, width is narrow adapter 10d is attached to the part that is used for mounting light emitting device that is arranged among the elongated board 10c.
In addition, the groove that adapter 10d adheres to elongated board 10c forms the back of part, and on the part of adapter 10d outside surface reflector plate 81 is set in case leak-stopping light.
According to another embodiment of the present invention, compensating plate 70 is set, and is connected to adapter 10d to form flat surfaces at the back of elongated board 10c.
Compensating plate 70 can be by making such as the porous vibration-absorptive material of styrofoam or MDF (medium-density fiberboard).
As shown in Figure 6, elongated board 10c can have step 15a, and this step extends to the end of elongated board 10c from groove 13, and the degree of depth is corresponding to the thickness of thin heat sink 50.
In addition, thin heat sink 50 comprises and is arranged in the groove 13 and the part that contacts with PCB 33 simultaneously.Thin heat sink 50 is from the bending of PCB contact site, and extension is with the outside around elongated board 10c and adapter 10d.That is, thin heat sink 50 preferably spreads all over than large tracts of land formation, thereby makes endotherm area and area of dissipation maximization.
Like this, because light guide panel comprises relatively thin elongated board 10c, but so light guide panel smooth curved.Therefore,, itself and this curved surface is agreed with, wish the place thereby can very conveniently easily this back light unit be installed in even described back light unit is installed in curved surface (for example, column structure) when going up.
More than describe the preferred embodiments of the present invention with reference to the accompanying drawings.It should be understood that employed word is descriptive and non-limiting word, and under the situation that does not deviate from true scope of the present invention and spirit, can change within the scope of the appended claims.Although disclose the preferred embodiments of the present invention for illustrative purpose, yet it will be clear to one skilled in the art that under situation about not deviating from, can carry out various modifications, increase and substitute by the disclosed scope and spirit of the present invention of claims.
As previously discussed, the invention provides a kind of back light unit, it does not need carriage fitting operation or PCB to adhere to operation, thereby has reduced the manufacturing cost of this back light unit.
The second, the invention provides a kind of back light unit, wherein heat sink comprises a thin plate, thereby is convenient to handle the situation that light guide panel or PCB install with curve shape, and does not need surface step is compensated.
The 3rd, the invention provides a kind of back light unit, it is easy to wishing the place customization according to consumer's concrete needs, thereby satisfy demands of individuals and company's demand quickly and easily, like this but range of application is expanded to the back light unit that the individual uses, therefore make availability maximization, thereby cause heavy demand for the user.
The 4th; the invention provides a kind of back light unit, wherein only be provided for holding the import of the groove of light-emitting device a position, and with this groove of rubber belt sealing; therefore thereby provide excellent waterproofness, even back light unit is installed under water and also can protects light-emitting device and circuit.Thereby, make the lifetime of lamp.
The 5th, the invention provides a kind of back light unit, the parts that wherein are installed in the groove (for example, PCB) are not exposed to the front surface of light guide panel, thereby the display screen of neatly simplifying are provided; And all embed in the thickness of light guide panel at all interior parts comprising electric wire, thereby can resist external disturbance or impact, be easy to handle, make and damage minimumly, and can pack easily or fitting operation.
The 6th, the invention provides a kind of back light unit, wherein make light guide panel elongated, thereby improved elasticity and realized portability, therefore be easy to crooked and install being applicable to curvilinear structures, and be easy to handle.
The 7th, the present invention allows to use flexible PCB to make various three-dimensional back light units, thereby but has significantly expanded the range of application of back light unit.
Claims (5)
1, a kind of back light unit comprises:
Light guide panel, it comprises a light guide plate or an astigmatism plate, has a plurality of recesses, inhomogeneous dot pattern on one or two surface of this light guide plate, prints dot pattern or matte surface;
Light-emitting device, it comprises the light emitting diode on the front surface that is installed in printed circuit board (PCB); And
Groove, it has two sidewalls and forms along the edge at the back side of described light guide panel,
This back light unit is characterised in that, between described two sidewalls of described groove, be equipped with a part and the described light-emitting device of thin heat sink, make the back side of described thin heat sink and described printed circuit board (PCB) be in direct contact with one another, and described light emitting diode directly contact with a sidewall of described groove.
2, back light unit as claimed in claim 1 is characterized in that,
One end of described groove extends to the edge surface of described light guide plate, provides electric wire to power to described light-emitting device by this end to described groove.
3, back light unit as claimed in claim 1, it is characterized in that, described thin heat sink is made by aluminum, should approach the heat sink bending, make the described part of described thin heat sink be assembled in the described groove contacting, and the remainder of described thin heat sink is exposed to the outside of described light guide panel with the back side of described printed circuit board (PCB).
4, back light unit as claimed in claim 1 is characterized in that, the bottom surface of described groove is provided with tunica albuginea, and feasible light from described light emitting diode can reflect on this tunica albuginea.
As each described back light unit in the claim 1 to 4, it is characterized in that 5, when described groove formed bending, described thin heat sink was provided with a plurality of V-arrangement recesses to be assembled in the described crooked groove.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050101018 | 2005-10-26 | ||
| KR1020050101018A KR100552589B1 (en) | 2005-10-26 | 2005-10-26 | A extemporizable backlight unit |
| KR1020050126542 | 2005-12-21 | ||
| KR1020060001562 | 2006-01-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1955814A CN1955814A (en) | 2007-05-02 |
| CN100454111C true CN100454111C (en) | 2009-01-21 |
Family
ID=37178911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100850270A Active CN100454111C (en) | 2005-10-26 | 2006-05-30 | Backlight unit capable of easily forming curved and three-dimensional shape |
Country Status (4)
| Country | Link |
|---|---|
| KR (1) | KR100552589B1 (en) |
| CN (1) | CN100454111C (en) |
| UA (1) | UA91079C2 (en) |
| ZA (1) | ZA200803676B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102878465A (en) * | 2012-10-16 | 2013-01-16 | 京东方科技集团股份有限公司 | High-brightness light-emitting diode (LED) panel lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100487308C (en) * | 2007-08-11 | 2009-05-13 | 石明峰 | Desk lamp |
| CN101949526B (en) * | 2010-07-12 | 2012-11-14 | 深圳市华星光电技术有限公司 | Side-entering type backlight module and back-plate heat radiating structure thereof |
| KR101074716B1 (en) | 2011-02-09 | 2011-10-19 | (주)성안엘이디 | Connectin structure of led |
| JP5331143B2 (en) | 2011-03-01 | 2013-10-30 | 興和株式会社 | Lighting device |
| KR101780420B1 (en) * | 2011-03-24 | 2017-09-22 | 삼성디스플레이 주식회사 | Back-light unit and 3-dimensional image display device having the same |
| TWI537646B (en) | 2011-05-11 | 2016-06-11 | 州巧科技股份有限公司 | Light source device for backlight module and liquid crystal display and manufacture method thereof |
| CN102943964B (en) | 2012-10-11 | 2015-04-01 | 京东方科技集团股份有限公司 | LED (Light Emitting Diode) lamp tube |
| KR20140070858A (en) * | 2012-11-28 | 2014-06-11 | 황근호 | Back light unit with enhanced assembly |
| CN102937251A (en) * | 2012-12-03 | 2013-02-20 | 田茂福 | Novel LED (Light-Emitting Diode) panel lamp |
| CN103411146A (en) * | 2013-08-10 | 2013-11-27 | 无锡市宝成塑胶科技有限公司 | Light-emitting diode (LED) panel lamp |
| DE102014100582A1 (en) | 2014-01-20 | 2015-07-23 | Osram Opto Semiconductors Gmbh | Illuminant with predeterminable radiation characteristic and manufacturing method for an optical body |
| CN104180223A (en) * | 2014-08-13 | 2014-12-03 | 朴明灿 | LED luminous plate |
| CN104390177A (en) * | 2014-11-14 | 2015-03-04 | 深圳市华星光电技术有限公司 | Backlight module |
| CN104566032B (en) * | 2014-12-30 | 2017-02-22 | 深圳市华星光电技术有限公司 | Waterproof backlight module |
| KR20180095187A (en) | 2017-02-17 | 2018-08-27 | 화우엔지니어링 주식회사 | Led module installation structure of light panel built in light source |
| KR102125477B1 (en) | 2018-09-07 | 2020-06-22 | 주식회사 금빛 | Ultra-slim back light unit |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR100552589B1 (en) | 2006-02-16 |
| UA91079C2 (en) | 2010-06-25 |
| ZA200803676B (en) | 2009-01-28 |
| CN1955814A (en) | 2007-05-02 |
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