CN101490468B - Backlight device, liquid crystal display device, method for assembling backlight device - Google Patents
Backlight device, liquid crystal display device, method for assembling backlight device Download PDFInfo
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- CN101490468B CN101490468B CN200780026284.XA CN200780026284A CN101490468B CN 101490468 B CN101490468 B CN 101490468B CN 200780026284 A CN200780026284 A CN 200780026284A CN 101490468 B CN101490468 B CN 101490468B
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Abstract
A fluorescent tube is prevented from being wrongly attached and broken when being attached, and luminance nonuniformity of backlight due to luminance difference generated in a tube axis direction of the fluorescent tube is reduced. A backlight device (2) is provided with a plurality of fluorescent tubes (21) having electrodes (211) at both ends; a bundling member (213) for bundling wirings (212) pulled out from the electrode (211) on one side of two or more of the fluorescent tubes (21); and a conducting parts (31) for achieving conduction between the electrodes of the two fluorescent tubes among the fluorescent tubes (21) by being connected with the bundling member (213). The conducting parts (31) permits a current to be carried between the electrodes of the two fluorescent tubes (21), which are bundled by the one bundling member (213), and the conducting means are arranged on inverter circuit substrate (28), respectively, not to be adjacent to each other.
Description
Technical field
The present invention relates to comprise back-light device, the liquid crystal indicator that uses this back-light device and the back-light device assembly method of many fluorescent tubes that drive by inverter circuit.
Background technology
In recent years, the giant-screenization along with liquid crystal TV set etc. requires back-lighting also to maximize.In order to adapt to this maximization requirement; And then adapt to requirements such as energy-conservationization, low priceization, through the central portion in fact of long straight tube fluorescent lamp is crooked, make bend pipe fluorescent lamps such as U-shaped or C shape; With replacement straight tube fluorescent lamp in the past, and exploitation is with the back-lighting of this bend pipe fluorescent lamp as light source.
Use under the situation of back-lighting of said bend pipe fluorescent lamp, distribute,, do not become problem very much though produce the temperature difference and the luminance difference of some tube axial directions less than forming than even temperature on 17 inches the screen size.Yet, because the progress of giant-screenization, remove as the high temperature of the lamp electrode part of main pyrotoxin outside the pale of civilizationly, the applied voltage of lamp also increases because of lamp is elongated, and the stray capacitance between the lamp unit that it brings is easy to generate leakage current near making high-voltage section.Again, the power increase of lamp brings inverter power to increase, and increases so be configured in the caloric value of the inverter of lamp electrode part dorsal part.Its result, the axial temperature difference of fluorescent tube becomes big.
Moreover, owing to produce said leakage current, near the tube axial direction high-voltage section, light lamp with the current value of rated current and leakage current sum, this becomes the reason of vertical luminance difference on the fluorescent tube direction of principal axis.Like this, along with the maximization of back-lighting, the trend that exists the axial temperature difference of fluorescent tube, luminance difference to increase, thereby produce the back-lighting uneven luminance.
To this point, also can be even if propose the large-screen liquid crystal display television machine with the back-lighting (for example the referenced patent document 1) of uniform brightness illumination.This back-lighting is put the electrode side and the mispairing of turn of bilge top-cross of bend pipe fluorescent lamp; Positive rear side at the reflection box of the electrode supply side of each fluorescent lamp disposes inverter respectively; Thereby the tube wall temperature difference on fluorescent tube direction of principal axis and the card direction is reduced, and the luminance difference on the card reduce.
Yet; Under the situation of the invention of above-mentioned patent documentation 1 record; The fluorescent tube that large size screen size (for example more than No. 40) requires the length of screen transverse width more than at least 1 times to form; But, be difficult to reach abundant stable supply system because the bending operation productivity ratio of the bend of fluorescent tube is low, the elongated production efficiency reduction that brings of fluorescent tube itself etc.Moreover, need be that mercury etc. for fluorescent tube inside does not produce the cause of inclination with the fluorescent tube horizontal arrangement.
Therefore; Usually adopt patent documentation 2 that kind to be connected in series in recent years fluorescent tube that the length of 2 screen transverse width degree forms and the fluorescent tube type of drive that it is lighted; Utilize this mode; Even if be loaded in the fluorescent tube in the back-lighting of tackling large-screen receiver, its length is no more than more than the needs.Utilize this advantage, can effectively produce large-scale back-light device.
Patent documentation 1: the spy of Japan opens the 2005-268028 communique
Patent documentation 2: the spy of Japan opens the 2002-231034 communique
Yet,, need prepare the fluorescent tube unit that arbitrary fluorescent tube all is electrically connected with other fluorescent tube each other through lead (223c that for example exists among Fig. 8 of patent documentation 2, these members of 225c) in advance according to the composition of above-mentioned patent documentation 2.This forms along with fluorescent tube quantity increases; It is many to connect the required number of lead wires quantitative change of each fluorescent tube; And because this syndeton, make fluorescent tube itself be configured in the back-lighting towards fixing, when therefore for example the fluorescent tube of the length of 80 centimetres of (cm)～150 centimetre (cm) degree is packed the inside of back-lighting casing for example into; The operator needs one side often perceive should be with this which side of the past casing of syndeton of fluorescent tube unit of length with own height degree to configuration; One side is assembled, and hinders the rapid assembling action to next flow chart, becomes the factor that hinders production efficiency to improve.
Especially the invention of patent documentation 1 record; Have the operation that the direction of arranging lamp is alternately changed the bend of configuration fluorescent tube unit, ground; Therefore when the lamp unit of U-shaped being installed to back-lighting; To be aligned to exactly successively in the reflection box etc., then must the position configuration of the 2nd lamp electrode be become opposite with the 1st lamp electrode that is connected inverter circuit.This operation has counting operation and lamp that number is installed and switches the many of operation, and the installation of lamp unit is taken a lot of work, and possibly cause mistake and the damaged problem of lamp of installing.When the fluorescent tube that the back-lighting of 2 millimeters (mm)～5 of diameter phi millimeter (mm), tens centimetres of total lengths (cm)～several meters (m) level uses especially was installed, problem was remarkable.Therefore, patent documentation 1 such fluorescent tube syndeton can become the factor that operating efficiency is reduced.
The present invention accomplishes in view of the truth of above-mentioned that kind; Its purpose is to provide a kind of back-light device based on simple assembly method; This assembly method is in the fluorescent tube type of drive of lighting that is connected in series; Do not have and often perceive fluorescent tube configuration orientation or the assembling work that counting number operation and lamp are switched operation is installed, difficult under the situation during fluorescent tube installation exercise etc. installation mistake and fluorescent tube breakage etc. take place.The object of the invention is to provide back-light device, the liquid crystal indicator that uses this back-light device and the back-light device assembly method that produces the back-lighting uneven luminance that luminance difference causes on a kind of tube axial direction that can reduce or eliminate fluorescent tube again.
The present invention also aims to provide the increase of the number of components that a kind of increase along with the fluorescent tube quantity of giant-screenization to back-lighting do not bring above-mentioned syndeton yet and based on the back-light device of better simply assembly process.
Summary of the invention
In order to solve above-mentioned problem, the 1st technological means of the present invention is a kind of back-light device, and many two ends of parallel configuration have the fluorescent tube of electrode, comprising: the member of gathering of gathering the wiring of drawing from the electrode of an end of said many fluorescent tubes; Releasably connect this and gather the connecting elements that member is used; And through connecting said member and the said connecting elements gathered; Make the conducting portion of conducting between 2 electrode in the said many fluorescent tubes; This conducting portion is used to produce or transmit alternating voltage and constitutes with the conductor of lighting said many fluorescent tubes by being arranged on a pair of circuit board; And make conducting between 12 electrode gathering the said fluorescent tube that member gathers; The part of said connecting elements comprise with said circuit board on transformer the 1st connecting elements that is connected and the 2nd connecting elements that is connected with said conducting portion, and said the 1st connecting elements and said the 2nd connecting elements alternately be installed on each circuit board of said a pair of circuit board.
The 2nd technological means is in the 1st technological means, and said conducting portion makes and is installed on the same circuit board and for releasably connecting conducting between the said terminal of gathering 2 connecting elements that member is provided with.
The 3rd technological means is in the 2nd technological means, with the mode adjacent to the fluorescent tube orientation, said 2 connecting elements is installed.
The 4th technological means is in the 2nd technological means, and configuration is by 2 fluorescent tubes of said conducting portion conducting, and other fluorescent tube is clipped in the middle of them.
The 5th technological means is in the 4th technological means, and the quantity that is configured to be clipped in other fluorescent tube between said 2 fluorescent tubes is 1.
The 6th technological means is in the 1st technological means; Dispose said conducting portion; Make adjacent 2 gather in the member one gather the said fluorescent tube that member gathers certain 1 electrode gather 1 electrode conduction of the fluorescent tube that member gathers across 1 fluorescent tube and another, and make this conducting portion not overlapping on said each a pair of circuit board.
The 7th technological means is in arbitrary technological means of the 2nd to 6, with at least a portion of said conducting portion, is routed in the transformer installing zone on said a pair of each circuit board.
The 8th technological means is in arbitrary technological means of the 2nd to 5, said connecting elements comprise with said circuit board on transformer the 1st splicing ear that is connected and the 2nd splicing ear that is connected with said conducting portion.
The 9th technological means is in arbitrary technological means of the 1st to 6, applies the ac voltage signal that the transformer on the said circuit board produces through the electrode to its arbitrary side, drives the said fluorescent tube by said conducting portion conducting.
The 10th technological means is in arbitrary technological means of the 1st to 6; Through to applying 2 ac voltage signals that phase place is different that the transformer on the said circuit board produces simultaneously, drive said fluorescent tube by said conducting portion conducting with 2 the different electrodes of electrode that are used to constitute its conducting state.
The 11st technological means is in arbitrary technological means of the 1st to 6, said each a pair of circuit board is arranged on the face of opposition side of the face that is provided with of said many fluorescent tubes, and is configured near the two end electrodes of said many fluorescent tubes.
The 12nd technological means is a kind of liquid crystal indicator, the back-light device of the arbitrary technological means comprising the 1st to 6 and the liquid crystal board that is thrown light on by this back-light device.
The 13rd technological means is a kind of back-light device assembly method; There is the fluorescent tube of electrode at many two ends of the parallel configuration of this back-light device; Wherein, The member of gathering of gathering the wiring of drawing from a termination electrode of said many fluorescent tubes through connection; Make in the said many fluorescent tubes conducting between 2 electrode, and produce or transmit alternating voltage with each a pair of circuit board of lighting said many fluorescent tubes and using on, be configured to the conducting portion that makes conducting between 12 electrode gathering the said fluorescent tube that member gathers non-conterminous.
The 14th technological means is in the 13rd technological means; Releasably connect the said part of gathering the connecting elements that member uses comprise with said circuit board on transformer the 1st connecting elements that is connected and the 2nd connecting elements that is connected with said conducting portion, and said the 1st connecting elements and said the 2nd connecting elements alternately be installed on each circuit board of said a pair of circuit board.
The 15th technological means is in the 13rd technological means; Produce or transmit alternating voltage with each a pair of circuit board of lighting said many fluorescent tubes on, with make adjacent 2 gather in the member one gather the said fluorescent tube that member gathers certain 1 electrode conducting portion of gathering 1 electrode conduction of the fluorescent tube that member gathers across 1 fluorescent tube and another be configured to not overlapping.
The 16th technological means is in the 15th technological means, with at least a portion of said conducting portion, is routed in the transformer installing zone on said a pair of each circuit board.
The 17th technological means is in the 15th or 16 technological means, releasably connects the said connecting elements that member is used of gathering, be crisscross arranged with said circuit board on transformer the 1st splicing ear that is connected and the 2nd splicing ear that is connected with said conducting portion.
The 18th technological means is a kind of back-light device; It is one distolateral with another distolateral configured in parallel side by side and drive that two ends have that many fluorescent tubes of electrode will be separately; Wherein, Said many fluorescent tubes are connected in series; Another the distolateral electrical connection section that is electrically connected usefulness that on circuit board, comprises another fluorescent tube distolateral and that be connected in series with said fluorescent tube with another of said fluorescent tube; Said many fluorescent tubes constitute a plurality of fluorescent tubes unit that drives with the mode of being connected in series, and the part of said circuit board comprises the 1st circuit board that comprises each electrical connection section used between distolateral that is electrically connected a fluorescent tube unit and is electrically connected the 2nd circuit board of each another electrical connection section of using between distolateral of said another fluorescent tube unit.
The 19th technological means is in the 18th technological means, with 1 fluorescent tube that constitutes a said fluorescent tube unit, is configured between 2 fluorescent tubes that constitute said another fluorescent tube unit and drives.
The 20th technological means is in the 18th or 19 technological means, constitutes said electrical connection section with printed wiring.
The 21st technological means is in the 18th or 19 technological means, on said circuit board, is equipped with a plurality of said electrical connection sections concurrently with the fluorescent tube orientation.
The 22nd technological means is in the 18th or 19 technological means, and distolateral to distolateral and said another fluorescent tube of the said fluorescent tube that is connected in series each other supplied with the opposite ac voltage signal of phase place.
The 23rd technological means is in the 18th or 19 technological means, and said circuit board comprises that the high pressure that a distolateral supply ac voltage signal of said fluorescent tube is used connects up and at least one side of inverter transformer.
The 24th technological means is in the 18th or 19 technological means, fluorescent tube in the said many fluorescent tubes more than 2 be equipped with a pair of gather respectively one of which distolateral with another distolateral member of gathering.
The 25th technological means is in the 18th or 19 technological means, with the shell inner surface of said circuit board arrangement at said back-light device.
The 26th technological means is in the 18th or 19 technological means, is arranged on each fluorescent tube unit of a plurality of electrical connection sections connections of said circuit board, drives parallel with one anotherly.
According to the present invention; Can be in the back-light device of the fluorescent tube type of drive lighted that is connected in series, thereby provide not have counting number operation difficult back-light device, the liquid crystal indicator that uses this back-light device and the back-light device assembly method that takes place to adorn mistake or fluorescent tube breakage etc. and can reduce or eliminate the back-lighting uneven luminance that the luminance difference that produces on the tube axial direction of fluorescent tube causes under the situation such as when switching operation fluorescent tube installation exercise with lamp is installed.
Again,, can drive U-shaped fluorescent tube unit, the especially operator be connected in series and can always not perceive the direction ground that fluorescent tube should dispose and assemble, therefore can seek to improve operating efficiency with better simply assemblying according to the present invention.Again and since be not only with wire harness with the composition that is electrically connected between a plurality of fluorescent tubes, therefore can the housing of back-lighting etc. not perceiveed fluorescent tube assembly direction ground and assembles.
Again,, needn't constitute the repeat circuit plate with mode and be connected to high voltage supplies such as inverter circuit board and use circuit board, need not make the stable wiring of GND current potential of repeat circuit plate, so can make simple structure as the GND terminal according to the present invention.
Again, according to the present invention, the U-shaped fluorescent tube that is connected in series being driven, therefore is not to use U-shaped pipe itself, can provide effective luminous zone that can effectively utilize each fluorescent tube also can fully tackle the back-lighting of large-screen lc plate.
Again, according to the present invention, even the fluorescent tube that is connected in series also can be supplied with sufficient high pressure, the uneven luminance of the length direction of the fluorescent tube of being convenient to suppress to be connected in series.
According to the present invention, can provide the ability of offsetting uneven luminance the further back-light device that improves again.
Description of drawings
Fig. 1 is the cutaway view that the composition example of the liquid crystal indicator that uses back-light device of the present invention is shown.
Fig. 2 is the routine figure of composition that the back-light device of embodiment of the present invention 1 is shown.
Fig. 3 is the routine figure of composition that the back-light device of embodiment of the present invention 2 is shown.
Fig. 4 is the routine figure of composition that the back-light device of embodiment of the present invention 3 is shown.
Fig. 5 is the figure that the assembly method of explanation one routine back-light device of the present invention is used.
Fig. 6 is the figure that the assembly method of another routine back-light device of the present invention of explanation is used.
Fig. 7 is the figure that the assembly method of another routine back-light device of the present invention of explanation is used.
Fig. 8 is the routine figure of composition that the back-light device of embodiment of the present invention 4 is shown.
Fig. 9 is the routine figure of composition that the back-light device of embodiment of the present invention 5 is shown.
Figure 10 is the figure that the assembly method of another routine back-light device of the present invention of explanation is used.
Figure 11 is the routine figure of composition that the back-light device of embodiment of the present invention 6 is shown.
Figure 12 is the figure to the composition example of the drive circuit of each fluorescent tube that back-light device of the present invention is shown.
Figure 13 be back-light device of the present invention is shown another of the drive circuit of each fluorescent tube formed the figure of example.
Label declaration
The 1st, liquid crystal board, the 2nd, back-light device, the 3, the 4th, framework, the 5th, supporting member, the 6th, lamp socket; The 21st, fluorescent tube, the 22nd, reflector plate, the 23rd, housing, the 24th, diffuser plate, the 25th, diffusion sheet; The 26th, preparatory zoom sheet, the 27th, reflecting polarizer, the 28th, inverter circuit board, the 29th, inverter transformer, the 30th, connecting elements (the 1st connecting elements, the 2nd connecting elements); The 31st, conducting portion (electrical connection section), the 32nd, high pressure wiring, the 101st, oscillating circuit, the 102nd, on-off circuit; The 103rd, the phase overturn circuit, the 211st, electrode, the 212nd, wiring, the 213rd, gather member.
The specific embodiment
Below, with reference to the preferred embodiments of description of drawings back-light device of the present invention, the liquid crystal indicator that uses this back-light device and back-light device assembly method.To having the identical label of part mark of identical function, omit the explanation of repetition.
Fig. 1 is the cutaway view that the composition example of the liquid crystal indicator that uses back-light device of the present invention is shown.Among the figure, as chief component, liquid crystal indicator comprises liquid crystal board 1 and back-light device 2.Liquid crystal board 1 carries out feed with the mode as the regulation grayscale voltage to vision signal processed video signal according to each pixel of clock signal of liquid crystal board 1, and the video of on screen, implementing to line by line scan shows to be handled, thereby shows the video that meets vision signal.Again, back-light device 2 is from the opposition side irradiates light of the display surface of liquid crystal board 1.As the light source of this back-light device 2, use the for example fluorescent tube of cold cathode fluorescent tube (CCFL:ColdCathode Fluorescent Lamp) etc.
The part of back-light device 2 comprises the many fluorescent tubes 21 that liquid crystal board 1 supply light is used, the light that makes 21 of each fluorescent tubes effectively shines reflector plate or radiant panel (hereinafter is represented with reflector plate) 22 and their housing 23 of receipts dress that the liquid crystal board side is used.The inverter circuit board 28 (inverter circuit 28) that inverter circuit is used is loaded in configuration at the back side of housing 23 (being the reverse side of the face that is provided with of fluorescent tube 21).In this inverter circuit board 28 inverter transformer 29 etc. is set, as booster circuit to each fluorescent tube 21 power supply.As this inverter transformer 29, there is the electromagnetic induction effect of for example utilizing 2 coils to carry out coil form of transformation etc. according to both sides' coil ratio.
As inverter circuit 28, for example can use the separated exciting inverter.The separated exciting inverter is generally at the elementary oscillating circuit that is provided with; And be transformed into the frequency identical interchange of driving frequency of oscillating circuit therewith; Through this separated exciting inverter being used to drive the inverter transformer 29 of above-mentioned coil form, can realize being coil form not only but also be the inverter that surpasses the small-sized and high efficiency of piezo-electric type.
The fluorescent tube 21 that constitutes back-light device 2 is a linearity, is configured to its core and is parallel to each other.The shape of reflector plate 22 is can be for example shown in Figure 1 such to be formed planely, also can form the concavo-convex shape in cross section.
Can various optical components be set according to the optical property that liquid crystal indicator needs again.For example; As shown in Figure 1, its part comprises diffuser plate 24 that allocation position that the light source that many fluorescent tubes 21 are constituted alleviates fluorescent tube 21 and the luminance difference of other position use, to transmission or the reflection and incide the reflecting polarizer 27 etc. of the polarisation of light degree raising usefulness of liquid crystal board 1 selectively of desired use form is supplied with diffusion sheet 25 that the optimal light distribution characteristic uses, the light that converges specific direction is used prism 26 and the polarised light that makes specific direction.Constitute these various opticses (diffuser plate 24, diffusion sheet 25, prism 26, reflecting polarizer 27 etc.) with tabular or sheet, they are configured between fluorescent tube 21 and the liquid crystal board 1.
Below, thus do not have in the fluorescent tube type of drive of lighting being connected in series install the counting number operation when switching operation fluorescent tube installation exercise etc. with lamp under the situation difficult each embodiment that takes place to adorn mistake or fluorescent tube breakage etc. and can reduce or eliminate the back-light device of the back-lighting uneven luminance that the luminance difference that produces on the tube axial direction of fluorescent tube causes describe.
Fig. 2 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 1 is shown.Among Fig. 2 (A), the two end electrodes of 211 (211R, L) expression fluorescent tube 21, the wiring that 212 (212R, L) expression comes self-electrode 211, the member of wiring 212 is gathered in 213 (213R, 213L) expression.Back-light device 2 comprise wiring 212 that the electrode 211 of gathering the end more than 2 from many fluorescent tubes 21 is drawn gather member 213 and through with gather the conducting portion 31 (31R, 31L) that member 213 is connected conducting between the electrode that makes in the many fluorescent tubes 21 2, make electrode 211 conductings of arbitrary end of 2 fluorescent tubes 21 by conducting portion 31.In this embodiment, gather member 213 and gather two end electrodes 211, the electrode 211 of an end is connected to conducting portion 31 through gathering member 213, the electrode 211 of the other end is connected to inverter transformer 29 through gathering member 213.
Back-light device 2 comprise produce or transmit alternating voltage with a pair of inverter circuit board 28 (28R, 28L) lighting a plurality of fluorescent tubes unit and use, be configured in inverter transformer 29 (29R, L) on the inverter circuit board 28, releasably connect the connecting elements 30 (30R, L) of gathering member 213 and draw and be connected to high pressure wiring 32 (32R, the L) of inverter transformer 29 from connecting elements 30, and be configured on each inverter circuit board 28 conducting portion 31 non-conterminous.That is, in each inverter circuit board 28, interconnected inverter transformer 29 and conducting portion 31.
This conducting portion 31 is the conductors that for example are arranged on the inverter circuit board 28, on this circuit board, does pattern printing etc., thereby forms this unit.Available printed circuit board for example.Thereby conducting portion 31 does not make the thickness of circuit board increase, and does not need special operation when conducting portion 31 is installed, so also can be suitable for the back-lighting of big molded dimension, simple composition capable of using is realized the elimination of tube axial direction uneven luminance.
Moreover, the purpose of conducting portion 31 Given this, as the composition of above-mentioned wiring, so long as the state that forms " electrical connection " fluorescent tube just can, this conducting portion partly changed reads to be electrical connection section.Thereby, needn't constitute and only utilize this wiring to make conducting between the electrode that should connect fully, can be electrically connected between through ballast parts such as capacitor, coil, transformers in the centre two electrodes.Thereby, by also effectively utilizing this circuit board in the installation and design of other purpose mounted component.We can say that this form to be fit to for example to install drives when making other 2 fluorescent tubes that U-shaped drives on the rightabout and supplying with inverter transformer that High AC voltages use etc. the U-shaped with said 2 fluorescent tubes, and the orientation that utilizes this circuit board that the U-shaped of fluorescent tube is driven to be turned to lamp is with the mode of driven (with reference to figure 3 (B) etc.).And, be not limited to inverter transformer, we can say that also this composition is fit to for example install the purpose of the circuit of making damaged detection of fluorescent tube or current value detection usefulness.
The part of connecting elements 30 comprises the 1st connecting elements that is connected with inverter transformer 29 and the 2nd connecting elements that is connected with conducting portion 31, and the 1st connecting elements and the 2nd connecting elements alternately are installed on the inverter circuit board 28.That is, the 1st connecting elements is connected with inverter transformer 29R on the inverter circuit board 28R, and connects one when gathering member 213R, the electrode of the electrode 211R of fluorescent tube unit is supplied with the High AC voltage from inverter transformer 29R.The 2nd connecting elements is connected with conducting portion 31L, and when connecting another and gathering member 213L, makes each electrode 211L conducting of fluorescent tube unit.
Among Fig. 2 (A), will gather fluorescent tube group that member 213 constitutes as the fluorescent tube unit, arrange and dispose 6 groups of these fluorescent tube unit (12 fluorescent tubes) by 2 fluorescent tubes 21 and 2.A pair of inverter circuit board 28 is arranged on the face of the face that is provided with opposition side of a plurality of fluorescent tubes unit, and is configured near the two end electrodes of fluorescent tube unit.
On the one inverter circuit board 28R, the high voltage side electrode (connecting inverter transformer 29R side) and low-voltage side electrode (being connected conducting portion 31R side) of each fluorescent tube unit is installed alternately successively from top to bottom.Equally, on another inverter circuit board 28L, the low-voltage side electrode (connecting conducting portion 31L side) and high voltage side electrode (being connected inverter transformer 29L side) of each fluorescent tube unit is installed alternately successively from top to bottom.
This conducting portion (being electrical connection section) 31L is taken as on said circuit board and comprises a plurality of compositions toward the fluorescent tube orientation with arranging; Thereby as distolateral or another distolateral needs that are routed in fluorescent tube of electrical connection section when a plurality of, obtain to save and surpass this special result of labour that comprises the number of components of many these circuit boards with needing.
In this embodiment, the electrode in 2 electrodes 211 is supplied with the High AC voltage from inverter transformer 29 in the high-pressure side (connecting inverter transformer 29 sides) of fluorescent tube unit, and with another electrode grounding.Thereby, by inverter transformer 29 one-sided driving fluorescent tube unit.
With the 1st connecting elements and the 2nd connecting elements that constitute connecting elements 30, releasably with gather member 213 and be connected.Can the 2nd connecting elements that be connected with conducting portion 31 be installed in inverter circuit board; Also for example conduct is worked out with the repeat circuit plate that said inverter circuit board separates; And inverter circuit board is configured in the distolateral of each fluorescent tube of being arranged in parallel, and the said repeat circuit plate of another distolateral configuration.At this moment; Circuit board 28L like Fig. 2 goes up a plurality of conducting portion 3La～c institute example of installing; With said circuit board 28L as the repeat circuit plate; Conducting portion 31La～c of being installed in this repeat circuit plate is implemented many wirings toward the orientation of fluorescent tube handle, thereby can make the be connected in series more succinct modular construction of many fluorescent tubes of a plurality of configured in parallel of many places on 1 block of repeat circuit plate.Again, can with gather member 213 and be connected, and make the electrode conduction of the voltage side that becomes each fluorescent tube unit just passable, with said gather that member cooperates and each electrode of fluorescent tube can form the state that is connected in series and also can.
Moreover the circuit board 28R that constitutes a pair of inverter circuit board 28 with circuit board 28L installs a plurality of conducting portion 31Ra～c toward the orientation of fluorescent tube too.
Through making this structure, can obtain and in the past the interconnected electrode side of the bend pipe fluorescent lamp effect identical with the turn of bilge side.That is, shown in Fig. 2 (B), high-pressure side and the low-pressure side of alternate configurations fluorescent tube unit 21a, 21b, thus can reduce the luminance difference of tube axial direction, thus reduce or eliminate the uneven luminance of back-lighting.When especially 2 fluorescent tubes of conducting being done to float driving, obtain the irregular neutralization effect of higher brightness.
Again; In the back-light device 2 of the fluorescent tube type of drive lighted of being connected in series; When setting is gathered the fluorescent tube unit that member 213 constitutes by 2 fluorescent tubes 21 and 2; Needn't U-shaped etc. the such position of considering electrode of bend pipe fluorescent lamp, the counting number operation be not installed switch operation etc. so do not produce with lamp, operation is set makes things convenient for.And, when the fluorescent tube unit that is provided with is connected to inverter circuit board 28, can be only the member 213 of gathering of fluorescent tube cell side be set in the inverter circuit board side.Therefore, produce the person liable and wait when being configured operation, can prevent dress mistake and lamp breakage etc., can conveniently and carry out installation exercise reliably.
Again, under the situation of bend pipe fluorescent lamp in the past, form warp architecture, so longitudinal length is the only about half of length of the identical straight tube fluorescent lamp of overall elongation length, giant-screenization is limited.Otherwise back-light device 2 of the present invention uses straight tube fluorescent lamp, so can tackle giant-screen.
Fig. 3 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 2 is shown.Among Fig. 3 (A), back-light device 2 forms the composition identical with embodiment 1 except that different these points with the composition of the 1st connecting elements 30 of inverter transformer 29.The 1st connecting elements 30 of this embodiment is connected with the member 213 of gathering from the fluorescent tube unit, and two electrodes of the electrode 211 of fluorescent tube unit are supplied with the High AC voltage from the inverter transformer on the inverter circuit board 28 29.Inverter transformer 29 is respectively disposed one respectively on two electrodes of electrode 211, thereby can supply with High AC voltage two electrodes 211.Therefore, carry out two side drives by 29 pairs of fluorescent tube unit of two inverter transformers.
Through making this structure, can obtain electrode side and the mispairing of turn of bilge top-cross being put same effect with bend pipe fluorescent lamp in the past.That is, shown in Fig. 3 (B), high-pressure side and the low-pressure side of alternate configurations fluorescent tube unit 21a, 21b, thus can reduce the luminance difference of tube axial direction, thus reduce or eliminate the uneven luminance of back-lighting.
Fig. 4 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 3 is shown.Among Fig. 4 (A), back-light device 2 is made the composition identical with embodiment 1 except that different these points with the composition of the 1st connecting elements 30 of inverter transformer 29.The 1st connecting elements 30 of this embodiment is connected with the member 213 of gathering from the fluorescent tube unit, and two electrodes of the electrode 211 of fluorescent tube unit are supplied with the High AC voltage from the inverter transformer on the inverter circuit board 28 29.Two electrodes of 29 pairs of electrodes 211 of contravarianter voltage device are disposed one, thereby can supply with High AC voltages two electrodes 211.So, carry out two side drives by 29 pairs of fluorescent tube unit of an inverter transformer.
Through making this structure, can obtain electrode side and the mispairing of turn of bilge top-cross being put same effect with bend pipe fluorescent lamp in the past.That is, shown in Fig. 4 (B), high-pressure side and the low-pressure side of alternate configurations fluorescent tube unit 21a, 21b, thus can reduce the luminance difference of tube axial direction, thus reduce or eliminate the uneven luminance of back-lighting.
Fig. 5～Fig. 7 is the figure that the assembly method of explanation one routine back-light device 2 of the present invention is used.Among the figure, near the supporting member that supports the electrode part of 5 expressions to fluorescent tube 21 is admitted the lamp socket of usefulness near the electrode part of 6 expressions to fluorescent tube 21.Support member 5 forms and will connect up 212 and gather member 213 and be drawn out near the support 52 that supports peristome 51 that case side uses and the electrode part to fluorescent tube 21.Admit the notch 61 of usefulness near the electrode part that lamp socket 6 forms fluorescent tube 21.
Among Fig. 5, with 2 fluorescent tubes 21 with gather near the notch 61 that is installed in lamp socket 6 electrode part of the fluorescent tube unit that member 23 forms, dress supporting member 5 in side's supports and fixes near the electrode part with 52 pairs of fluorescent tubes 21 of support from it.At this moment, from the peristome of supporting member 5 51 lead-out wirings 211 with gather member 213.
Then, as shown in Figure 6, will be drawn out to the outside from housing 23 from the member 213 of gathering that supporting member 5 is drawn again.
Then, as shown in Figure 7, near configuration inverter circuit board 28 both ends of the outer surface (being the face of the face that the is provided with opposition side of fluorescent tube 21) of housing 23.Alternately dispose the 1st connecting elements 30 and the 2nd connecting elements 30 that is connected conducting portion 31 that connects inverter transformer 29 on this inverter circuit board 28.Then, see, gather member 213 with the 1st and the 3rd and be connected that at least one of the lateral electrode through 30 pairs of fluorescent tube unit of the 1st connecting elements supplied with the High AC voltage from the inverter transformer on the inverter circuit board 28 with the 1st connecting elements 30 from the top; Gather member 213 with the 2nd and be connected, make fluorescent tube unit each electrode conduction of opposite side through the 2nd connecting elements 30 with the 2nd connecting elements 30.
Embodiment 4
Fig. 8 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 4 is shown.Among Fig. 8 (A); Configuration conducting portion 31; Make adjacent 2 to gather any electrode 211 that one in the member 213 gather the fluorescent tube 21 that member 213 gathers and gather electrode 211 conductings of the fluorescent tube 21 that member 213 gathers, and make this conducting portion not overlapping on each inverter circuit board 28 across a fluorescent tube and another.Gather member 213 and gather two end electrodes 211, one electrode 211 is connected to conducting portion 31 through gathering member 213, another electrode 211 is connected to inverter transformer 29 through gathering member 213 at each end.Thus, in each inverter circuit board 28, each root fluorescent tube alternate configurations connects the on high-tension side electrode 211 of inverter transformer 29, thereby can reduce or eliminate the uneven luminance of tube axial direction.
At this moment, with at least a portion of conducting portion 31, be routed in the transformer installing zone on each inverter circuit board 28.For example, be configured to downside through inverter transformer 29.Thus, be not in contact with one another or approaching, can prevent the breakage that causes because of the short circuit phenomenon that both (high-voltage lines and conducting line) contacted take place or electric discharge phenomena from the high-voltage line of inverter transformer 29 output and conducting line as conducting portion 31.
Back-light device 2 comprises releasably and to connect the connecting elements 30 of gathering member 213 usefulness, connecting elements 30 be crisscross arranged with inverter circuit board 28 on inverter transformer 29 the 1st splicing ear T1 that is connected and the 2nd splicing ear T2 that is connected with conducting portion 31.
On the one inverter circuit board 28R, the high voltage side electrode (connecting inverter transformer 29R side) and low-voltage side electrode (being connected conducting portion 31R side) of each fluorescent tube is installed alternately successively from top to bottom.Equally, on another inverter circuit board 28L, the low-voltage side electrode (connecting conducting portion 31L side) and high voltage side electrode (being connected inverter transformer 29L side) of each fluorescent tube is installed alternately successively from top to bottom.That is, in each inverter circuit board 28, the electrode 211 of the high-pressure side of the interconnected connection inverter transformer 29 of each root fluorescent tube (or low-pressure side of connection conducting portion 31).
In this embodiment, arrange and dispose a plurality of fluorescent tube unit of forming by 2 adjacent fluorescent tubes, and to supply with the High AC voltage from inverter transformer 29 (i.e. 2 inverter transformers 29) respectively across 2 electrodes 211 of 1 fluorescent tube.Thereby 2 fluorescent tubes that connected by 29 pairs of conducting portions of inverter transformer 31 carry out two side drives.
Through making this structure, can obtain electrode side and the mispairing of turn of bilge top-cross being put same effect with bend pipe fluorescent lamp in the past.That is, shown in Fig. 8 (B), each root fluorescent tube 21a, 21b alternate configurations high-pressure side, thus can reduce the luminance difference of tube axial direction, thus reduce or eliminate the uneven luminance of back-lighting.
Fig. 9 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 5 is shown.Among Fig. 9 (A); Configuration conducting portion 31; Make adjacent 2 to gather any electrode 211 that one in the member 213 gather the fluorescent tube 21 that member 213 gathers and gather electrode 211 conductings of the fluorescent tube 21 that member 213 gathers, and make this conducting portion not overlapping on each inverter circuit board 28 across a fluorescent tube and another.Gather member 213 and gather two end electrodes 211, one electrode 211 is connected to conducting portion 31 through gathering member 213, another electrode 211 is connected to inverter transformer 29 through gathering member 213 at each end.Thus, in each inverter circuit board 28, each root fluorescent tube alternate configurations connects the on high-tension side electrode 211 of inverter transformer 29, thereby can reduce or eliminate the uneven luminance of tube axial direction.
The back-light device 2 of this embodiment is made the composition identical with above-mentioned embodiment 4 except that different these points with the composition of connecting elements 30 of inverter transformer 29.In this embodiment, arrange and dispose a plurality of fluorescent tube unit of forming by 2 adjacent fluorescent tubes 21, to the High AC voltage of supplying with from 1 inverter transformer 29 across 2 electrodes 211 of 1 fluorescent tube.Thereby 2 fluorescent tubes that connected by 29 pairs of conducting portions of inverter transformer 31 carry out two side drives.
Through making this structure, can obtain electrode side and the mispairing of turn of bilge top-cross being put same effect with bend pipe fluorescent lamp in the past.That is, shown in Fig. 9 (B), each root fluorescent tube 21a, 21b alternate configurations high-pressure side, thus can reduce the luminance difference of tube axial direction, thus reduce or eliminate the uneven luminance of back-lighting.
The assembly method of the back-light device of embodiment 4 then, is described.Shown in figure 10, near configuration inverter circuit board 28 two ends of the outer surface of housing 23 (being the face of opposition side of the face that is provided with of fluorescent tube 21).The connecting elements 30 that is configured in this inverter circuit board 28 is crisscross arranged and connects the 1st splicing ear and the 2nd splicing ear that is connected conducting portion 31 of inverter transformer 29.Then; See from the top; Gathering member 213 with the 1st and the 2nd is connected with the corresponding connecting elements 30 of its difference; Electrode to each fluorescent tube unit is supplied with the High AC voltage from the inverter transformer 29 of the 1st splicing ear that connects each connecting elements 30, and utilizes the conducting portion 31 of the 2nd splicing ear that connects each connecting elements 30 to make conducting between another electrode.
Figure 11 is the routine figure of composition that the back-light device 2 of embodiment of the present invention 6 is shown.Among Figure 11 (A); Configuration conducting portion (electrical connection section) 31La; Make adjacent 2 to gather any electrode 211L that one among the member 213L gather the fluorescent tube 21 that member 213L gathers and gather the electrode 211L conducting of the fluorescent tube 21 that member 213L gathers, and make this conducting portion not overlapping on each inverter circuit board 28 across 2 fluorescent tubes and another.Gather the two end electrodes 211L (R) that member 213L (R) gathers each fluorescent tube of disposed adjacent; At each end one electrode 211L (R) is connected to conducting portion 31La (Ra) through gathering member 213L (R), another electrode 211R (L) is connected to inverter transformer 29La (Ra) through gathering member 213R (L).Particularly, be clipped in other fluorescent tube 21b between 2 fluorescent tube 21a that U-shaped drives, through other electrical connection section 2 fluorescent tube 21b carried out U-shaped again and drive with 2 formations.Thus, among each inverter circuit board 28L (R), per 2 fluorescent tube alternate configurations connect the on high-tension side electrode 211 of inverter transformer 29L (R), thereby can reduce or eliminate the uneven luminance of tube axial direction.
Again; Has a kind of composition; Wherein dispose to such an extent that 2 fluorescent tubes being clipped between the fluorescent tube that is connected by said conducting portion 31La also are connected in series by another conducting portion 31Ra that is arranged on another inverter circuit board 28R, and float by opposite 2 High AC voltages of phase place of the output of the inverter transformer 29La on the inverter circuit board 28L and to drive.
Other conducting portion (electrical connection section 31Lb, c) that is installed on the same inverter circuit board also is provided with according to periphery composition and purpose same as described above, and through on 1 circuit board, constituting a plurality of conducting portions, bindiny mechanism's parts that can reach fluorescent tube are simplified.Equally, (electrical connection section 31Ra～c) also have the composition that is installed in 1 circuit board equally obtains effect same as described above to other conducting portion.
In the back-light device 2 of this embodiment, constitute inverter transformer 29L (R) respectively by the inverter transformer of 2 opposite High AC voltages of output phase, this point is identical with above-mentioned embodiment 5.On the other hand, be electrically connected on this aspect of each fluorescent tube of 2 fluorescent tubes, it forms different.Compare with embodiment 5 shown in Figure 9, we can say that this embodiment is a composition best when using 2 more small-sized output type transformers.Promptly; The specification of the transformer that requires as the embodiment of Fig. 9; Between 2 lead-out terminals of this transformer owing to there is the terminal that connects at the fluorescent tube that is clipped between 2 fluorescent tubes that this transformer lights; Need take into full account the safe distance of avoiding the risk that this terminal and the wiring of other high pressure contact, be designed to interval the best of 2 terminals of transformer.On the other hand; In this embodiment of Figure 11; Needn't give the constraint in this design of transformer, just can fully reduce the risk that connects up and contact with high pressure, have the advantage that restriction needn't be set the size of transformer as long as wires design becomes conducting member 31La that kind under the coil of transformer, to get over.
Thereby, the small-sized transformer of trying one's best can be installed, even if the inverter circuit board of many transformers is installed, also can implement to reach easily its lightweight design.Again, in this embodiment, arrange and dispose a plurality of fluorescent tube unit of forming by 2 adjacent fluorescent tubes 21,, supply with 2 High AC voltages of both sides' phase overturn from 1 inverter transformer 29 2 electrodes 211 across 2 fluorescent tubes.Thereby 2 fluorescent tubes that connected by 29 pairs of conducting portions of inverter transformer 31 carry out two side drives.
Through making this structure, can obtain electrode side and the mispairing of turn of bilge top-cross being put same effect with bend pipe fluorescent lamp in the past.That is, shown in Figure 11 (B), with 2 fluorescent tubes alternate configurations high-pressure side, ground that is clipped in the middle, thus needn't consider the direction of fluorescent tube unit, and can eliminate the uneven luminance of back-lighting.
Again, as far as the embodiment of the present invention of the such record of preceding text, also can be shown in figure 12, utilize composition to inverter transformer parallel connection to drive as the fluorescent tube unit 21a of 1 unit with another fluorescent tube unit 21c to 2 fluorescent tubes that will be connected in series.The scope of the power that can export at inverter transformer thus, reduces its number of components as far as possible.
Example as concrete mainly connects into as follows.Shown in Figure 12 (A), at first, comprise 2 inverter transformer 29R at an inverter circuit board 28R.Then; Utilization is recommended switch driven circuit 102R (for example by forming by 2 or 4 transistors such as FET that constitute) by the oscillator signal of oscillating circuit 103R output, and the sense of current of primary coil circulation that makes each transformer is with the constantly variation continuously of said frequency.The power that is input to transformer like this is transformed into the step-up ratio N that meets primary coil that this transformer constitutes and the turn ratio of secondary coil takes advantage of the output voltage that obtains behind the input voltage, apply the High AC voltage of the degree of fluorescent tube generation electric discharge phenomena.
Also comprise phase overturn circuit 101R, so that keep the opposite relation of alternating voltage phase place of these 2 inverter transformer 29R outputs.Particularly; Can consider to constitute respectively the reverse embodiment such as relation that reel of primary coil formation secondary coil separately to the bobbin that is wound on both sides' transformer; But do not have special the qualification, the GND terminal and the HV Terminal of each secondary coil that also can constitute the transformer of same composition is connected to fluorescent tube with HV Terminal reciprocally.
Like this; The High AC voltage with the opposite relation of phase place that the composition that has is exported 2 inverter transformer 29R is supplied with 2 another distolateral electrode 211R of the fluorescent tube unit 21a of 2 pipes that are connected in series respectively through the conducting portion 31L that is in another circuit board 28L, drive the fluorescent tube that U-shaped connects.Meanwhile, constitute the fluorescent tube unit 21c that these 2 High AC voltages are input to another 2 pipes too.As a result, 2 fluorescent tube unit 21a and the 21c that makes 2 pipes that are connected in series is to inverter transformer 29R parallel connection and be driven by it.
Equally, fluorescent tube unit 21b and the 21d that constitutes being connected in series 2 fluorescent tubes also utilizes 2 inverter transformer 29L, on-off circuit 102L and phase overturn circuit 101L etc. and identical composition mentioned above to carry out parallel connection and drives.
Again; Constitute and alternately dispose fluorescent tube unit 21a, c and 21b, the d that drives by inverter transformer 28R, 28L respectively each other; So even number transformer also can keep the screen left and right sides illuminance distribution of each fluorescent tube to length direction less, always and the operator can not perceive fluorescent tube unit configuration direction ground and assemble.
Moreover about the composition of inverter transformer, preceding text are such to inspire its composition, but is specially Figure 12 (B) that kind, is made up of primary coil 29R-1,29L-1 and secondary coil 29R-2,29L-2 respectively.
Again, the above-mentioned composition that can be used for embodiment 1 to embodiment 3 in fact that consists of, the hereinafter example can be used for the embodiment of embodiment 4,5 and 6.
Among Figure 13 (A), different with Figure 12 (A), illustrate 2 pipes that are connected in series in the fluorescent tube 21 fluorescent tube unit 21a fluorescent tube and the fluorescent tube alternate configurations that constitutes another fluorescent tube unit 21b be connected in series equally the embodiment that is activated.
Equally; Also alternate configurations also drives fluorescent tube 21c that is connected in series equally and the fluorescent tube that constitutes another fluorescent tube unit 21d; Also utilize 2 inverter transformer 29R of the opposite High AC voltage of output phase, the driving of under the state that fluorescent tube unit 21a and 21c is parallel with one another, floating (with reference to the connection status of black cloth line) with white fluorescent tube.On the other hand, to fluorescent tube unit 21b and 21d, also utilize from 2 High AC voltages of 2 same inverter transformer 29L outputs and carry out parallel connection driving (with reference to the connection status of ash wiring) with grey fluorescent tube.
Utilize this composition, also drive the fluorescent tube that drives by inverter transformer 28L and 28R by the root alternate configurations, therefore than such per 2 alternate configurations shown in above-mentioned Figure 12 (A), the easy elimination to the uneven luminance on the screen of fluorescent tube parallel connection direction.In addition; In the assembly process of this back-light device; Can also always not perceive and gather the configuration direction that member holds together fluorescent tube together; And the completion assembling work, the back-light device assembling work that the fluorescent tube of tens long (about 1 meter (m) degree) and bore little (in the diameter about 5 millimeters (mm)) therefore is installed becomes easily.
Again, Figure 13 (B) illustrates the fluorescent tube unit 21a of 2 pipes that are connected in series in the fluorescent tube 21, the embodiment that under the state that 2 pipes of another fluorescent tube unit 21b that will be connected in series equally all are clipped in the middle, disposes and drive.
Equally; Also fluorescent tube 21c to being connected in series equally; Under the state that 2 fluorescent tubes with another fluorescent tube unit 21d all are clipped in the middle, be configured and drive; Also utilize 2 inverter transformer 29R of the opposite High AC voltage of output phase, the driving of under the state that fluorescent tube unit 21a and 21c is parallel with one another, floating (with reference to the connection status of black cloth line) with white fluorescent tube.On the other hand, to fluorescent tube unit 21b and 21d, also utilize from 2 High AC voltages of 2 same inverter transformer 29L outputs and carry out parallel connection driving (with reference to the connection status of ash wiring) with grey fluorescent tube.
Utilize this composition, per 2 alternate configurations also drive the fluorescent tube that is driven by inverter transformer 28L and 28R, and are therefore identical with above-mentioned Figure 12 (A), eliminate easily the uneven luminance on the screen of fluorescent tube parallel connection direction.In addition; In the assembly process of this back-light device; According to the present invention; Can also always not perceive and gather the configuration direction that member holds together fluorescent tube together, and accomplish assembling work, become easily so the back-light device assembling work of the fluorescent tube of tens long (about 1 meter (m) degree) and bore little (in the diameter about 5 millimeters (mm)) is installed.
Moreover; In Figure 12 (A) and Figure 13 (A), (B) illustrated embodiment; Should constitute the inverter transformer 29 of each fluorescent tube unit of parallel connection to try one's best quantity few, but with respect to fluorescent tube quantity and the lengths needed power considering to be connected in series, the rated value of inverter transformer (for example power output etc.) is inadequately the time; Available 2 transformers constitute each inverter transformer; And shown in 12 (C), with its each primary coil and each parallel connection of secondary windings ground to each fluorescent tube unit supply power, thereby the power of supply needs.
Moreover, among the present invention, also can constitute with 1 inverter circuit said many group fluorescent tube unit 21a～d are driven.
Again; Fig. 7 and the example of the composition shown in Figure 10 as embodiment of the invention example; At the outer surface of housing 23 (being the face of opposition side of the face that is provided with of fluorescent tube 21) configuration inverter circuit 28, but it forms the inner surface that also can at least one side or the both sides of these inverter circuits 28L, R be configured in housing 23; At this moment; The inverter circuit 28 that is configured in shell inner surface is through receiving dress with it with each end of fluorescent tube by the lamp socket 6 of example among these figure; Can realize the slimming that display element is overall again, suppress influence again near the uneven luminance that can produce that disposes said inverter circuit board.Again, above-mentioned explanation is replaced as inverter circuit board in the composition example of the circuit board that the fluorescent tube that is connected in series uses, and also can obtain same effect.
As above illustrated; According to the present invention; The fluorescent tube type of drive of circuit even if be connected in series; Owing to do not have and the counting number operation is installed does not switch operation with lamp, also difficult under the situation during fluorescent tube installation exercise etc. dress mistake or fluorescent tube breakage etc. take place, and can reduce or eliminate the back-lighting uneven luminance that the luminance difference of the tube axial direction generation of fluorescent tube causes.
Again,, do not need other thickness, can eliminate the uneven luminance of the back-lighting of big molded dimension with the simple composition that does not need the conducting portion installation exercise because conducting portion (conducting line etc.) is carried out the pattern printing on circuit board.
Again; The conducting portion of the composition that forms makes conducting between the same electrode of gathering the fluorescent tube of gathering in the member; So can drive the luminance difference that is easy to generate because of fluorescent tube unit in the elimination of a plurality of fluorescent tubes unit as many pipes; Especially under situation about driving that 2 fluorescent tubes of conducting are done to float, can bring into play the irregular cancelling capabilities of higher brightness.
Again; Have conducting portion and make the composition of conducting between 2 connecting elements that are installed on the same circuit board; Exist because of the fluorescent tube unit as many pipes drives the luminance difference that is easy to generate so can be configured to mix between a plurality of fluorescent tubes unit, can bring into play the irregular cancelling capabilities of higher brightness.
Again; With the part of conducting portion, be routed in the transformer installing zone on the circuit board, so although must interlock mixed configuration on circuit board from the high-voltage line and the conducting portion of outputs such as transformer; Can not have yet and be in contact with one another or approaching anxiety; According to design, the short circuit phenomenon that can take place, the breakage that electric discharge phenomena cause both can have been avoided between the two, again mixed configuration each other.
Claims (16)
1. a back-light device walks abreast and disposes the fluorescent tube that many two ends have electrode, it is characterized in that, comprising:
The member of gathering of gathering the wiring of drawing from the electrode of an end of said many fluorescent tubes;
Releasably connect this and gather the connecting elements that member is used; And
Through connecting said member and the said connecting elements gathered, make the conducting portion of conducting between 2 electrode in the said many fluorescent tubes,
This conducting portion is used to produce or transmit alternating voltage and constitutes with the conductor of lighting said many fluorescent tubes by being arranged on a pair of circuit board, and makes conducting between 12 electrode gathering the said fluorescent tube that member gathers,
The part of said connecting elements comprise with said circuit board on transformer the 1st connecting elements that is connected and the 2nd connecting elements that is connected with said conducting portion, and said the 1st connecting elements and said the 2nd connecting elements alternately be installed on each circuit board of said a pair of circuit board.
2. back-light device as claimed in claim 1 is characterized in that,
Said conducting portion makes and is installed on the same circuit board and for releasably connecting conducting between the said terminal of gathering 2 connecting elements that member is provided with.
3. back-light device as claimed in claim 2 is characterized in that,
With the mode adjacent, said 2 connecting elements are installed to the fluorescent tube orientation.
4. back-light device as claimed in claim 2 is characterized in that,
Configuration is by 2 fluorescent tubes of said conducting portion conducting, and other fluorescent tube is clipped in the middle of them.
5. back-light device as claimed in claim 4 is characterized in that,
The quantity that is configured to be clipped in other fluorescent tube between said 2 fluorescent tubes is 1.
6. back-light device as claimed in claim 1 is characterized in that,
Dispose said conducting portion; Make adjacent 2 gather in the member one gather the said fluorescent tube that member gathers certain 1 electrode gather 1 electrode conduction of the fluorescent tube that member gathers across 1 fluorescent tube and another, and make this conducting portion not overlapping on said each a pair of circuit board.
7. like each described back-light device in the claim 2 to 6, it is characterized in that,
With at least a portion of said conducting portion, be routed in the transformer installing zone on said a pair of each circuit board.
8. like each described back-light device in the claim 2 to 5, it is characterized in that,
Said connecting elements comprise with said circuit board on transformer the 1st splicing ear that is connected and the 2nd splicing ear that is connected with said conducting portion.
9. like each described back-light device in the claim 1 to 6, it is characterized in that,
Apply the ac voltage signal that the transformer on the said circuit board produces through electrode, drive said fluorescent tube by said conducting portion conducting to arbitrary side of said fluorescent tube.
10. like each described back-light device in the claim 1 to 6, it is characterized in that,
Through to applying 2 ac voltage signals that phase place is different that the transformer on the said circuit board produces simultaneously, drive said fluorescent tube by said conducting portion conducting with 2 the different electrodes of electrode that are used to constitute its conducting state.
11. like each described back-light device in the claim 1 to 6, it is characterized in that,
Said each a pair of circuit board is arranged on the face of opposition side of the face that is provided with of said many fluorescent tubes, and is configured near the two end electrodes of said many fluorescent tubes.
12. a liquid crystal indicator is characterized in that,
Comprise each described back-light device in the claim 1 to 6 and by the liquid crystal board of this back-light device illumination.
13. a back-light device assembly method, there is the fluorescent tube of electrode at many two ends of the parallel configuration of this back-light device, it is characterized in that,
The member of gathering of gathering the wiring of drawing from a termination electrode of said many fluorescent tubes through connection makes in the said many fluorescent tubes conducting between 2 electrode, and
Produce or transmit alternating voltage with each a pair of circuit board of lighting said many fluorescent tubes and using on, the conducting portion that makes conducting between 12 electrode gathering the said fluorescent tube that member gathers is configured to non-conterminous,
Releasably connect the said part of gathering the connecting elements that member uses comprise with said circuit board on transformer the 1st connecting elements that is connected and the 2nd connecting elements that is connected with said conducting portion, and said the 1st connecting elements and said the 2nd connecting elements alternately be installed on each circuit board of said a pair of circuit board.
14. back-light device assembly method as claimed in claim 13 is characterized in that,
Produce or transmit alternating voltage with each a pair of circuit board of lighting said many fluorescent tubes on, with make adjacent 2 gather in the member one gather the said fluorescent tube that member gathers certain 1 electrode conducting portion of gathering 1 electrode conduction of the fluorescent tube that member gathers across 1 fluorescent tube and another be configured to not overlapping.
15. back-light device assembly method as claimed in claim 14 is characterized in that,
With at least a portion of said conducting portion, be routed in the transformer installing zone on said a pair of each circuit board.
16. like claim 14 or 15 described back-light device assembly methods, it is characterized in that,
Releasably connect the said connecting elements that member is used of gathering, be crisscross arranged with said circuit board on transformer the 1st splicing ear that is connected and the 2nd splicing ear that is connected with said conducting portion.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP188865/2006 | 2006-07-10 | ||
| JP2006188865 | 2006-07-10 | ||
| JP2007164643A JP4104644B2 (en) | 2006-07-10 | 2007-06-22 | Backlight device, liquid crystal display device, and method for assembling backlight device |
| JP164643/2007 | 2007-06-22 | ||
| PCT/JP2007/062967 WO2008007560A1 (en) | 2006-07-10 | 2007-06-28 | Backlight device, liquid crystal display device, method for assembling backlight device and substrate device for connecting fluorescent tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101490468A CN101490468A (en) | 2009-07-22 |
| CN101490468B true CN101490468B (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200780026284.XA Expired - Fee Related CN101490468B (en) | 2006-07-10 | 2007-06-28 | Backlight device, liquid crystal display device, method for assembling backlight device |
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| Country | Link |
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| JP (1) | JP4590463B2 (en) |
| CN (1) | CN101490468B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010041496A1 (en) * | 2008-10-10 | 2010-04-15 | シャープ株式会社 | Illuminating device and liquid crystal display device |
| WO2011058903A1 (en) * | 2009-11-12 | 2011-05-19 | シャープ株式会社 | Illuminating device, display device, and television receiver |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0859933B1 (en) * | 1996-09-18 | 2002-07-10 | Koninklijke Philips Electronics N.V. | Backlight luminaire |
| JP4071405B2 (en) * | 1999-10-05 | 2008-04-02 | 三菱電機株式会社 | Liquid crystal display |
| JP2002278471A (en) * | 2001-03-21 | 2002-09-27 | Tama Electric Co Ltd | Backlight device and method for turning on the same |
| KR100493386B1 (en) * | 2002-12-18 | 2005-06-07 | 엘지.필립스 엘시디 주식회사 | Back light unit |
| JP2004327328A (en) * | 2003-04-25 | 2004-11-18 | Harison Toshiba Lighting Corp | Backlight device |
| JP2004349040A (en) * | 2003-05-21 | 2004-12-09 | Nec Lcd Technologies Ltd | Backlight device and liquid crystal display |
-
2007
- 2007-06-28 CN CN200780026284.XA patent/CN101490468B/en not_active Expired - Fee Related
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- 2008-03-24 JP JP2008075832A patent/JP4590463B2/en not_active Expired - Fee Related
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| JP2008204955A (en) | 2008-09-04 |
| JP4590463B2 (en) | 2010-12-01 |
| CN101490468A (en) | 2009-07-22 |
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