CN101652603A - Backlight comprising hot cathode fluorescent lamp - Google Patents
Backlight comprising hot cathode fluorescent lamp Download PDFInfo
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- CN101652603A CN101652603A CN200880011410A CN200880011410A CN101652603A CN 101652603 A CN101652603 A CN 101652603A CN 200880011410 A CN200880011410 A CN 200880011410A CN 200880011410 A CN200880011410 A CN 200880011410A CN 101652603 A CN101652603 A CN 101652603A
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- lamp
- backlight
- hot
- cathode fluorescent
- fluorescent lamp
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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
- G02F1/133604—Direct backlight with lamps
Abstract
Disclosed is a backlight (100) comprising a hot cathode fluorescent lamp (10). Specifically disclosed is a backlight (100) comprising a hot cathode fluorescent lamp (10) having a bulb (12), a base (50) provided on an end portion of the hot cathode fluorescent lamp (10), a socket (40) to be connected with an external terminal (52) of the base (50), and a lamp holder (75) for holding the hot cathodefluorescent lamp (10). The external terminal (52) of the base (50) extends in a direction generally perpendicular to the longitudinal direction (92) of the bulb (12) (for example, in a direction opposite to the screen direction (90)), and the lamp holder (75) comprises an elastic member (77) which enables to move the hot cathode fluorescent lamp (10) along the longitudinal direction (92) of the bulb (12).
Description
Technical field
The present invention relates to possess the backlight of hot-cathode fluorescent lamp, particularly relate to the backlight that big frame TV machine or billboard are used.
Background technology
Current, the light source of backlight liquid crystal display lamp unit mainly adopts cold-cathode fluorescence lamp.Cold-cathode fluorescence lamp is because be fit to thin diameterization, so it is used as the light source (reference example such as patent documentation 1) of the backlight unit that requires slimming.
Patent documentation 1: Japanese kokai publication sho 56-73855 communique
In recent years, LCD constantly maximizes, and backlight unit also develops toward the direction that maximizes thereupon.Because the maximization of backlight unit, if adopt cold-cathode fluorescence lamp as light source, then not only lamp circuit can become complicated, and institute's consumed power also can become big.
In more detail, cold-cathode fluorescence lamp is compared with other lamps, and it is bigger to drive required voltage (driving voltage), must adopt high voltage source.Particularly since recently picture dimension meet or exceed 32 inches large-scale LCD (for example, LCD that 32 inches, 42 inches, 46 inches, 65 inches or its are above) appearance, the length of lamp becomes more and more longer, corresponding to this, driving voltage also has the tendency of further high-pressure trend.
In addition, cold-cathode fluorescence lamp input electrical power with regard to each is very little, but in order to ensure the brightness of picture, but needs a lot of tubes, and therefore, not only the cost of product has risen, and it is also big to assemble the possibility that required problems such as increase in man-hour highlight.
In this case, beginning to inquire into to adopt has more high efficiency than cold-cathode fluorescence lamp, and the hot-cathode fluorescent lamp that lamp circuit also can more be oversimplified is as the possibility of the light source of backlight unit.But, adopt the developmental research of cold-cathode fluorescence lamp until today is still very in vogue as backlight unit, consequently, in fact the shortcoming of hot-cathode fluorescent lamp is not also overcome.
The application's inventor is for the problem of the significant day by day backlight unit along with the maximization of LCD, do not adopt the method for current improvement cold-cathode fluorescence lamp as main flow to solve, but attempt using hot-cathode fluorescent lamp to solve this problem.
Adopt the backlight unit of hot-cathode fluorescent lamp, compared with the backlight unit that uses cold-cathode fluorescence lamp, there is the tendency that becomes wideer in its picture frame zone.This is because in hot-cathode fluorescent lamp, use comprises the electrode of launching thermionic filament, become non-luminous component by the zone in the fluorescent tube outside more than this filament, in addition, encapsulation supports the encapsulation of the pair of lead wires of this filament to extend to the end of lamp with the length of regulation.
In the actual backlight unit that uses, lamp holder is installed in the lamp end of hot-cathode fluorescent lamp (encapsulation), and, is disposed the socket of terminal latch (outside terminal) insertion of this lamp holder in this lamp holder outside.Under the form of the back of the body illuminator that comprises this socket, the as far as possible little needs in picture frame zone are worked hard.
Summary of the invention
The present invention makes in view of such existing problems, and its main purpose is, is provided to reduce picture frame (Amount Vela in the backlight that possesses hot-cathode fluorescent lamp effectively) structure in zone.
Backlight among the present invention is the backlight that possesses hot-cathode fluorescent lamp, possess: have the hot-cathode fluorescent lamp that on inner surface, forms the fluorescent tube (bulb) of fluorophor, the lamp holder, the socket that is connected with the outside terminal of described lamp holder that are provided with in the end of described hot-cathode fluorescent lamp and the lamp bracket of supporting described hot-cathode fluorescent lamp, the described outside terminal of described lamp holder with the direction of the length direction approximate vertical of described fluorescent tube on extend, and above-mentioned lamp bracket has elastic component, thereby described hot-cathode fluorescent lamp can move along the length direction of fluorescent tube.
In a certain preferred example, between the fluorescent tube and described lamp bracket of described hot-cathode fluorescent lamp, dispose above-mentioned elastic component.
In a certain preferred example, described elastic component is made of the silicon rubber that contains filler.
In a certain preferred example, above-mentioned backlight also possesses the basket that holds hot-cathode fluorescent lamp, and described jack configurations is for moving with respect to described basket, and described hot-cathode fluorescent lamp utilizes lamp bracket to be fixed by described elastic component.
In a certain preferred example, described backlight also possesses the basket that holds hot-cathode fluorescent lamp, and described lamp bracket is fixed on the described basket by described elastic component.
In a certain preferred example, between the fluorescent tube and described lamp bracket of described hot-cathode fluorescent lamp, dispose more elastic component.
In a certain preferred example, between the basket and described lamp bracket of described backlight, form the engaging pawl of engaging mutually, described lamp bracket utilizes described engaging pawl to be fixed in the basket of described backlight.
In a certain preferred example, the outside terminal of above-mentioned lamp holder extends to the rightabout with the screen orientation of described backlight.
In a certain preferred example, above-mentioned backlight be under the backlight of type device used for image display.
In a certain preferred example, above-mentioned backlight is the light source that the LCD of 32 to 46 inches picture dimensions is used, 4 to 6 above-mentioned hot-cathode fluorescent lamps of configuration in above-mentioned backlight.
In a certain example, above-mentioned filament is made of the quadruple coil.
In a certain example, above-mentioned hot-cathode fluorescent lamp is the fluorescent lamp of nominal life-span more than 20,000 hours.
In a certain example, the above emitter of coating 5.0mg on the described filament in the pair of electrodes that above-mentioned hot-cathode fluorescent lamp is.
In a certain example, the air pressure in the described fluorescent tube of above-mentioned hot-cathode fluorescent lamp is more than the 500Pa.
In a certain example, the cross sectional shape of the fluorescent tube of above-mentioned hot-cathode fluorescent lamp is circular.
In a certain example, the cross sectional shape of the fluorescent tube of above-mentioned hot-cathode fluorescent lamp is substantially oblong-shaped.
If adopt backlight of the present invention, even the outside terminal of lamp holder that then makes the end that is arranged at hot-cathode fluorescent lamp is towards extending with the direction (for example opposite with screen orientation direction) of the length direction approximate vertical of fluorescent tube, under the situation of seeking picture frame zone densification, also because lamp bracket has the elastic component so that hot-cathode fluorescent lamp is moved along the length direction of fluorescent tube, so the problem that the tolerance of the length direction of the thermal expansion of fluorescent tube or fluorescent tube is brought can eliminate fluorescent lamp lighting the time.Consequently, in possessing the backlight of hot-cathode fluorescent lamp, can dwindle the picture frame zone effectively.
Description of drawings
Fig. 1 is the exploded perspective view of structure that is used to illustrate the image display device 1000 of the backlight 100 that comprises example of the present invention.
Fig. 2 is the profile that schematically shows the hot-cathode fluorescent lamp 10 of example of the present invention.
Fig. 3 is the profile of structure of the backlight 100 of expression example of the present invention.
Fig. 4 is the plane of structure of the backlight 100 of expression example of the present invention.
Fig. 5 is the stereogram that is used to illustrate the structure of the lamp holder 50 of example of the present invention and socket 40.
Fig. 6 is the stereogram of structure that is used to illustrate the lamp bracket 75 of example of the present invention.
Fig. 7 is the profile of structure that is used to represent the lamp bracket 75 of example of the present invention.
Fig. 8 is the profile of variation that is used to illustrate the lamp bracket 75 of example of the present invention.
Symbol description
10 hot-cathode fluorescent lamps
11 electrodes
12 fluorescent tubes (glass lamp)
13 lead-in wires
14 filaments
15 beades
16 encapsulation
17 blast pipes
18 extensions
19 lead-in wires
21 reflecting plates
22 auxiliary reflecting plates
23 reflector plates
24 pillars
30 optical sheets
31 deflection films
32 lens
33 diffusion disks
34 diffusing panels
40 sockets
42 baskets
50 lamp holders
52 outside terminals (latch)
60 liquid crystal panels
62 loam cakes
65 image display area
70 lamp circuits
72 lower covers, basket
75 lamp brackets
77 elastic components
78 elastic components
90 screen orientations
92 fluorescent tube length directions
100 backlights
1000 liquid crystal indicators (image display device)
The specific embodiment
The application's inventor considers, what be suitable for backlight that LCD that big pictureization accelerates day by day uses is not to adopt current cold-cathode fluorescence lamp as main flow (CCFL), and consider to turn to employing every tubes compared with cold-cathode fluorescence lamp can obtain the hot-cathode fluorescent lamp (HCFL) of bigger power output, then it is researched and developed.Consider that such reason that turns to is, utilize the feature of " the big power output " of hot-cathode fluorescent lamp, can strengthen the contrast of liquid crystal TV set, can make and comprise dynamic image and become better in interior image quality, simultaneously compared with cold-cathode fluorescence lamp, the number of the fluorescent lamp that uses as backlight also can be cut down significantly, can reduce cost.
In addition, compare with the backlight that adopts cold-cathode fluorescence lamp, adopt the backlight of hot-cathode fluorescent lamp, there is the tendency that broadens in its picture frame zone, and therefore also studies the way of reply.The picture frame zone of backlight is in case change is big, and the apparent size of image display device (LCD) also can become greatly, and the situation of the requirement in the design takes place to satisfy sometimes.And, no matter appearance and size how, requires also cannot satisfy this requirement under the situation of little picture frame in design.
Under these circumstances, the application's applicant is installed in the bearing of trend of outside terminal (lamp holder latch) of lamp holder of the end of hot-cathode fluorescent lamp by change, successfully realize the densification in picture frame zone.Concrete way is, the lamp holder latch does not extend along the length direction of lamp, but extend to the right angle orientation (the particularly direction of the basket of backlight) of this length direction, can make picture frame zone densification like this, economize and assign the space that the socket to the extended line of lamp holder latch occupies.That is to say not jack configurations in the outside, and it is disposed at the side (basket direction, or the direction opposite with screen orientation) of lamp holder, successfully realize the densification in picture frame zone thus along the lamp holder of the length direction of lamp.
But, the fluorescent tube of hot-cathode fluorescent lamp (glass tube) in use can be in length direction generation thermal expansion, and different fluorescent tubes have length variation (tolerance) in the longitudinal direction, if the direction of lamp holder latch beyond this length direction extended, then the setting of hot-cathode fluorescent lamp becomes difficult.Specifically, if the lamp holder latch alongst extends, in the method, owing to be the structure that has the socket of socket, and even the such deviation of then thermal expansion tolerance all is easy to be absorbed, if but the lamp holder latch extends towards the basket direction, then this deviation just can not be absorbed simply, may cause the lamp holder latch can't insert the state of affairs of socket.The present inventor is absorbed in the structure of inquiring into and having obtained absorbing the lamp holder and the socket of this deviation, has obtained the present invention.
Below with reference to description of drawings example of the present invention.In following picture, for the purpose of simplifying the description, represent with same reference symbol for the inscape that has same function in fact.In addition, the invention is not restricted to the example of the following stated.
, the backlight 100 of example of the present invention is described to Fig. 4 below with reference to Fig. 1.
Fig. 1 is the exploded perspective view of structure that schematically shows the image display device (liquid crystal indicator) 1000 of the backlight 100 that comprises this example, and Fig. 2 is the cross-section structure of hot-cathode fluorescent lamp 10 that schematically shows the backlight 100 of this example.Fig. 3 and Fig. 4 are respectively the profile and the vertical views of the structure of expression backlight 100 of this example and image display device 1000.
The backlight 100 of this example possesses hot-cathode fluorescent lamp 10, and hot-cathode fluorescent lamp 10 is made of the fluorescent tube 12 that forms fluorophor (not shown) at inner surface.In fluorescent tube 12, be provided with and launch thermionic filament 14, and, be provided with lamp holder 50 in the end of hot-cathode fluorescent lamp.Lamp holder 50 is made of for example resin material (PET (PETG), PBT (polybutyl terapthalate) etc.) or metal material (aluminium etc.).
In this example, around lamp holder 50, dispose socket (not shown), so that be connected with the outside terminal (not shown) of lamp holder 50.The outside terminal of lamp holder 50 is to extending with the direction (for example opposite direction of screen orientation 90) of length direction 92 approximate vertical of fluorescent tube 12.And, in the backlight 100 of this example, being provided with the lamp bracket 75 of supporting hot-cathode fluorescent lamp 10, lamp bracket 75 possesses the elastic component (not shown) that hot-cathode fluorescent lamp 10 can be moved along the length direction 92 of fluorescent tube 12.The detailed formation of the elastomeric material that lamp bracket 75 possesses will be narrated below.
Fig. 2 schematically shows the profile construction of hot-cathode fluorescent lamp 10 of backlight 100 usefulness of this example.The hot-cathode fluorescent lamp 10 of this example needs long lamp in service life owing to be as backlight.Best, hot-cathode fluorescent lamp 10 adopts the fluorescent lamps of nominal life-span more than 1.2 ten thousand hours to be advisable, and better is nominal life-span is more than 20,000 hours or the fluorescent lamp more than 30,000 hours.Also have, always be about 20000 hours as life-span of the widely used CRT of display (cathode-ray tube), always so wish to adopt life-span lamp thereon.
Illustrated hot-cathode fluorescent lamp 10 is made of the glass lamp 12 of straight tube-like and the pair of electrodes 11 that is provided with at glass lamp 12 two ends.
Inner surface at glass lamp 12 is coated with fluorophor (not shown).Particularly, on the inner surface 12a of glass lamp 12, form the diaphragm that aluminium oxide constitutes, stack fluorescent body layer on this diaphragm.The fluorophor that constitutes luminescent coating can adopt for example fluorophor (Y of burn red
2O
3: Eu), the fluorophor (LaPO of glow green
4: Ce, Tb
3), the fluorophor (BaMg of the coloured light that turns blue
2Al
16O
27: Eu, Mn) mixture of these rare-earth phosphors.In addition, fluorophor can adopt other terres rares fluorophor.For example, red available (Y, La)
2O
3: Eu, 3.5MgO0.5MgF
2GeO
2: Mn, green available CeMgAl
11O
19: Tb, GdMgB
2O
10: Ce, Tb, blue available (Sr, Ca)
10(PO
4)
6C
12: Eu etc.
At glass lamp 12 inner mercury and the rare gas enclosed.In this example, enclose about 5mg mercurys (not shown) in the glass lamp 12 and be the argon gas (Ar) of 500Pa as air pressure under the normal temperature of the rare gas that cushions usefulness.Also have, the mercurys of enclosing in the glass lamp 12 except mercury simple substance, also can be enclosed with the form of the mercury alloy (amalgam) of zinc-mercury, tin mercury, bismuth, indium mercury etc.
In addition, though the available blending ratio of rare gas is 100% argon gas (Ar), also can be used in the mist that has mixed krypton gas (Kr) in the argon gas (Ar).The mixing ratio (intrinsic standoff ratio) of krypton gas (Kr) can be for example 20%～60%, as an example, can use argon gas: the mist (air pressure 600Pa) of krypton gas=50%: 50%.
The emitter of coating is the oxide of strontium, calcium, barium for example on the filament 14.In this example, realize long-life fluorescent lamp, increase the emission scale of construction that is coated on the filament 14, in this example, the above emitter of coating 5.0mg on the filament 14 in the pair of electrodes of each hot-cathode fluorescent lamp 10.In addition, rare gas is not made up of 100% argon gas, but when sneaking into than the big krypton of ar atmo amount with the ratio of regulation, then emitter is not easy to disperse from filament 14, and this technology means that the life-span of lamp can become longer.
The illustrated electrode 11 compacted encapsulation 16 that are sealed in glass lamp 12.In addition, encapsulation blast pipe 17 at least one end of glass lamp 12.This blast pipe 17 not only is used to discharge the gas in the fluorescent tube 12, and also uses this blast pipe 17 when enclosing rare gas, is discharging inclosure gas rear enclosed.Also have,, then have the advantage that the discharge of can high efficiency carrying out gas is enclosed if blast pipe 17 all is provided with rather than only is located at an end of fluorescent tube 12 at the two ends of fluorescent tube 12.And, also can reduce the impurity ratio of fluorescent tube 12 inside by means of this.
In the end of glass lamp 12, be covered with encapsulation 16 and blast pipe 17 is provided with lamp holder 50.In addition, the mode of connection of the extension 18 of the lead-in wire 13 that extends outward from encapsulation 16 and lamp holder 50 according to the specification of lamp 10 suitably decision get final product.Particularly, the outside terminal (for example latch) that is formed at lamp holder 50 is electrically connected with the extension 18 of lead-in wire 13.The outside terminal of lamp holder 50 (not shown) is extending with the direction (for example opposite with screen orientation direction) of length direction 92 approximate vertical of fluorescent tube 12, and the outside terminal of lamp holder 50 is connected in socket (not shown).
As Fig. 1, Fig. 3 and shown in Figure 4, the backlight 100 that comprises hot-cathode fluorescent lamp 10 is assembled in the liquid crystal indicator 1000, the backlight 100 of this example be under the backlight of type device used for image display.And backlight 100 is as for example more than 26 inches (preferably more than 32 inches.For example 32 inches, 40 inches, 42 inches, 46 inches, 65 inches etc.) the area source used of LCD use.Also have, do not express liquid crystal panel among Fig. 1, and express liquid crystal panel 60 among Fig. 3.
In illustrated embodiment, express the example of 6 hot-cathode fluorescent lamps 10 of configuration.But the number of hot-cathode fluorescent lamp 10 is not to be defined in this number.Also having, in a preferred example of this example, is the panel of 32 to 46 inches LCD for picture dimension, and configurable 4 to 6 hot-cathode fluorescent lamps 10 make it light, work.
As the reflecting plate 21 of the part of the basket of the backlight 100 that holds this example, be to make by metallic plate (as steel or the aluminium of electroplating), its thickness is 1.5mm.In the illustrated embodiment, the part of reflecting plate 21 bends to convex (triangular shape), constitutes auxiliary reflecting plate 22.Comprise on the upper surface (the interarea 20b of basket) of the reflecting plate 21 of assisting reflecting plate 22, formed reflector plate 23.Reflector plate 23 is made of PETG (PET) resin bed that the white titanium dioxide (perhaps calcium carbonate) that is scattered here and there forms, and its thickness is 2.0mm.The pillar 24 that the lower surface of optical sheet 30 is used is supported in formation on the part on the summit (or crest line) of assisting reflecting plate 22.Pillar 24 is a white resin system.In addition, the height H of backlight 100 shown in Figure 3 (height from the upper surface of reflecting plate 21 to optical sheet 30 place faces) is 27mm.
In addition, as shown in Figure 3, below the reflecting plate 21 of backlight 100, can collocation point circuit for lamp (ballasting circuit or ballast) 70.In this example, a lamp circuit 70 is set, thereby 6 fluorescent lamps 10 use 6 lamp circuits 70 altogether at each lamp 10.But the number of lamp circuit 70 also can be different with the number of lamp 10.
And for example shown in Figure 4, the lamp bracket 75 of supporting lamp 10 usefulness is set in the end of reflecting plate 21.Lamp bracket 75 is made by for example white resin.In addition, at the peristome 20a place of the basket of backlight 100 optical sheet 30 is set.In this example, the element that optical sheet 30 comprises, from beginning to be followed successively by deflection film 31 (DBEF (DualBrightness Enhancement Film) that 3M Co., Ltd. in Sumitomo makes, thickness is 0.440mm), lens 32 (thickness 0.155mm), diffusion disk 33 (thickness 0.113mm), diffusing panel 34 (thickness 2.0mm).Also can lens be set again at the lower surface of diffusing panel 34.
Further, liquid crystal panel (for example about 2mm of thickness) 60 is set on optical sheet 30, sets loam cake 62 then and cover this liquid crystal panel 60 and optical sheet 30.Loam cake 62 is made of for for example metallic plate of 1.5mm thickness.In addition, though the size (with reference to Fig. 4) of the image display area 65 in the example is 1018mm * 573mm, be not limited to this size certainly, other sizes also can.Again,, the periphery of the encapsulation 16 of lamp 10 is covered as the picture frame zone, so that cannot see the position that this is not lighted from the outside for the position of not lighting of concealed hight 10.In addition, liquid crystal panel 60 residing directions when backlight 100 is observed are become screen orientation 90.
Below with reference to Fig. 5, Fig. 6 and Fig. 7, the outside terminal 52 of the lamp holder 50 of this example and the structure of socket 40 and the structure of lamp bracket 75 are described.The stereogram that Fig. 5 uses for the structure that the outside terminal 52 that lamp holder 50 is described is connected with socket 40.Fig. 6 be expression fluorescent tube 12 that outside terminal 52 is connected with socket 40 by 77 stereograms that are held in the structure of lamp bracket 75 of elastic component, Fig. 7 is the profile of the structure identical with Fig. 6.
The lamp holder 50 of this example is installed on the end of the fluorescent tube 12 of hot-cathode fluorescent lamp 10, and the outside terminal 52 of lamp holder 50 is made of metal material (for example copper or copper alloy etc.), makes the latch shape.The latch 52 of lamp holder 50 is connected with socket 40 around being disposed at lamp holder 50.As shown in Figure 7, the latch 52 of lamp holder 50 can be connected by lead-in wire 19 with lamp 10.And socket 40 is electrically connected with lamp circuit 70 shown in Figure 3.Thereby, being connected in socket 40 by latch 52 with lamp holder 50, lamp 10 just is electrically connected with lamp circuit 70.
As shown in Figure 5, form the peristome 41 of the latch 52 that holds lamp holder 50 on the basket 42 of socket 40, by this peristome 41, latch 52 is connected with socket 40.In the structure of this example,, bottom surface 50a at least a portion of lamp holder 50 is made plane (or general plane), so that lamp holder 50 is more firm with being connected of socket 40 owing to be the upper surface 42a of the basket 42 of socket 40.Again, form at the bottom surface of lamp holder 50 50a under the situation of planar section, whole bottom surface 50 can be processed as the plane, also can a part be processed as the plane bottom surface 50a.
Perhaps also can change the upper surface 42a of the basket 42 of socket 40 according to the shape of lamp holder 50.For example, the section shape of lamp holder 50 is under the situation of circular (perhaps oval, Long Circle), can form the upper surface 42a with arc surface corresponding with it.In addition because the relation of the length of the latch 52 of lamp holder 50, certainly lamp holder 50 be shaped as circle, even the smooth structure of the upper surface 42a of the basket 42 of socket 40 is also passable.
As Fig. 6, shown in Figure 7, the hot-cathode fluorescent lamp 10 of this example is supported that by lamp bracket 75 in more detail, the fluorescent tube 12 usefulness lamp brackets 75 of the end periphery of lamp 10 are supported fixing.Lamp bracket 75 possesses the elastic component 77 that lamp 10 can be moved along the length direction 92 of fluorescent tube 12, particularly, elastic component 77 is disposed at 75 of fluorescent tube 12 and lamp brackets.
As Figure 6 and Figure 7, if adopt this example structure, then since lamp bracket 75 and 10 Jie of hot-cathode fluorescent lamp at elastic component 77,10 on lamp is held on the lamp bracket 75, so lamp 10 can move along the length direction 92 of fluorescent tube 12.Thereby, even replace make latch 52 along the length direction 92 of fluorescent tube from the extended typical form of the end face of lamp holder 50, and make direction that latch 52 extends for the direction of length direction 92 approximate vertical of fluorescent tube (for example opposite direction) with screen orientation 90, seek to make under the situation of picture frame zone (zones in image display area 65 outsides among Fig. 4 and Fig. 6) densification of image display device 1000 thermal expansion of fluorescent tube 12 or the problem brought by the tolerance on the length direction 92 of fluorescent tube 12 in the time of also fluorescent lamp lighting can being eliminated.Consequently, in the backlight that possesses hot-cathode fluorescent lamp 10, can dwindle the picture frame zone effectively.
Under the situation of fluorescent tube (glass tube) 12 by soda-lime glass (Soda-Lime Glass) formation, the linear expansion coefficient of soda-lime glass is 91 * 10
17/ ℃, therefore be that 1000mm, temperature rise 30 ℃ the time in the length of for example fluorescent tube 12, the big appointment of length increases about 0.3mm.In addition, the length tolerance of fluorescent tube 12 is about ± 1.5mm.Even such elongation takes place fluorescent tube 12,, also can solve such problem by means of the structure of this example.
In the illustrated embodiment, socket 40 is housed on the basket of backlight 100, the latch 52 of lamp holder 50 extends upward the negative side of screen orientation 90, but the bearing of trend of latch 52 is not limited to this direction.Because latch 52 can make the picture frame zone of image display device 1000 dwindle if along extending with the direction of length direction 92 approximate vertical of fluorescent tube 12, then compare with the situation of extending same as before from the end of fluorescent tube 12.
In addition, in this example, socket 40 is configured to and can moves with respect to basket, and hot-cathode fluorescent lamp 10 utilizes lamp bracket 75 fixing by elastic component 77.By like this socket 40 being set to free end, thus, also can on bigger degree, guarantee the one-movement-freedom-degree of lamp 10.
Fig. 8 is the variation of the backlight 100 of this example.In the illustrated embodiment, lamp bracket 75 is fixed on the basket 72 by elastic component 78.There is elastic force by making like this between lamp bracket 75 and the basket 72, hot-cathode fluorescent lamp 10 also can be moved on the length direction 92 of fluorescent tube.
In addition, identical with formation shown in Figure 7, in the formation shown in Figure 8 also at fluorescent tube 12 and 75 configuration elastic components 77 of lamp bracket of hot-cathode fluorescent lamp 10.Also have, in the structure shown in Figure 8, form the engaging pawl (72a, 75a) of engaging mutually at basket 72 and lamp bracket 75, lamp bracket 75 utilizes this engaging pawl (72a, 75a) to be fixed on the basket 72.When using the structure of such engaging pawl (72a, 75a), not only install simple and easyly, and be not easy to drop.
Also have, utilize elastic component (77 or 78) in this example to realize, the travel mechanism that is provided with on the lamp bracket 75 is so long as can then can implement various changes along the mechanism of length direction 92 portable lamps 10 of fluorescent tube 12.
More than describe the present invention by means of preferred example.Such record and non-limiting item are certainly carried out various modifications to it.
For example, in the above-described configuration, the outside terminal 52 of lamp holder 50 is expressed as the terminal of latch shape, but is not limited to this, also can adopt the terminal of other shapes (for example rectangle).Also have, the section of the fluorescent tube 12 of hot-cathode fluorescent lamp 10 is not limited to the shape of circle (or being roughly circle), also can be the shape that is roughly ellipse (ellipse, Long Circle, other flat patterns).The structure of the filament of hot-cathode fluorescent lamp 10 (coil) 14 and configuration also can be adopted suitable scheme.
In addition, the backlight in the example of the present invention is suitable for for example big picture liquid crystal TV set more than 32 inches as mentioned above, but also is not limited thereto, and also is fit to be used in the liquid crystal TV set of medium-sized (for example 26 inches～14 inches).And be not limited to liquid crystal TV set, also can be used for the backlight of other image display devices (particularly being used for showing the display unit of big picture) or the backlight of billboard.
The possibility of industrial application
If employing the present invention then can be provided in the backlight that possesses hot-cathode fluorescent lamp Can effectively dwindle the structure in picture frame zone.
Claims (10)
1. a backlight is the backlight that possesses hot-cathode fluorescent lamp, it is characterized in that possessing:
Have on inner surface the fluorescent tube that forms fluorophor hot-cathode fluorescent lamp,
Be arranged on the end of described hot-cathode fluorescent lamp lamp holder,
The socket that is connected with the outside terminal of described lamp holder and
The lamp bracket that keeps described hot-cathode fluorescent lamp,
The described outside terminal of described lamp holder with the direction of the length direction approximate vertical of described fluorescent tube on extend,
And described lamp bracket has the elastic component that described hot-cathode fluorescent lamp can be moved along the length direction of described fluorescent tube.
2. backlight according to claim 1 is characterized in that,
Between the fluorescent tube and described lamp bracket of described hot-cathode fluorescent lamp, dispose described elastic component.
3. backlight according to claim 2 is characterized in that,
Described elastic component is made of the silicon rubber that contains filler.
4. according to claim 2 or 3 described backlights, it is characterized in that,
Described backlight also possesses the basket that holds hot-cathode fluorescent lamp,
Described jack configurations be for can move with respect to described basket,
Described hot-cathode fluorescent lamp utilizes described lamp bracket to be fixed by described elastic component.
5. backlight according to claim 1 is characterized in that,
Described backlight also possesses the basket that holds hot-cathode fluorescent lamp,
Described lamp bracket is fixed on the described basket by described elastic component.
6. backlight according to claim 5 is characterized in that,
Between the fluorescent tube and described lamp bracket of described hot-cathode fluorescent lamp, dispose more elastic component.
7. according to claim 5 or 6 described backlights, it is characterized in that,
At the basket and the described lamp bracket of described backlight, form the engaging pawl of engaging mutually,
Described lamp bracket utilizes described engaging pawl to be fixed on the basket of described backlight.
8. according to each the described backlight in the claim 1～7, it is characterized in that,
The outside terminal of described lamp holder extends to the rightabout with the screen orientation of described backlight.
9. according to each the described backlight in the claim 1～8, it is characterized in that,
Described backlight be under the backlight of device used for image display of type.
10. backlight according to claim 9 is characterized in that,
Described backlight is the light source that the LCD of 32 to 46 inches picture dimensions is used,
4 to 6 described hot-cathode fluorescent lamps of configuration in described backlight.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP104994/2007 | 2007-04-12 | ||
| JP2007104994A JP2008262821A (en) | 2007-04-12 | 2007-04-12 | Backlight equipped with hot cathode fluorescent lamp |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101652603A true CN101652603A (en) | 2010-02-17 |
Family
ID=39875399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200880011410A Pending CN101652603A (en) | 2007-04-12 | 2008-04-09 | Backlight comprising hot cathode fluorescent lamp |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2008262821A (en) |
| CN (1) | CN101652603A (en) |
| WO (1) | WO2008129869A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5562006B2 (en) * | 2009-11-11 | 2014-07-30 | ユーテック株式会社 | Lighting unit |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0124815Y2 (en) * | 1985-10-25 | 1989-07-26 | ||
| JPS6326688A (en) * | 1986-07-18 | 1988-02-04 | 松下電器産業株式会社 | Fluorescent lamp mounting apparatus |
| JPH0261020U (en) * | 1988-10-28 | 1990-05-07 | ||
| JPH0547719Y2 (en) * | 1989-04-28 | 1993-12-16 | ||
| JP2548467Y2 (en) * | 1992-10-22 | 1997-09-24 | ホシザキ電機株式会社 | Lamp holder for tubular lamp |
| JPH0772476A (en) * | 1993-09-02 | 1995-03-17 | Harrison Denki Kk | Illumination device |
| JPH08310292A (en) * | 1995-05-19 | 1996-11-26 | Ichikoh Ind Ltd | Lighting fixture for vehicle |
| JP4306301B2 (en) * | 2003-03-31 | 2009-07-29 | セイコーエプソン株式会社 | Backlight unit |
| JP4289932B2 (en) * | 2003-06-06 | 2009-07-01 | ニッポ電機株式会社 | Lamp base |
| JP4155969B2 (en) * | 2004-01-14 | 2008-09-24 | シャープ株式会社 | Lighting device for display device |
| US20090103316A1 (en) * | 2005-06-16 | 2009-04-23 | Sharp Kabushiki Kaisha | Chassis for a light source unit, a light source unit including the chassis, and a display device including the chassis |
| KR101267527B1 (en) * | 2005-09-08 | 2013-05-23 | 엘지디스플레이 주식회사 | fluorescent lamp guide holder for liquid crystal display device, back light assembly and liquid crystal display module using thereof |
-
2007
- 2007-04-12 JP JP2007104994A patent/JP2008262821A/en active Pending
-
2008
- 2008-04-09 CN CN200880011410A patent/CN101652603A/en active Pending
- 2008-04-09 WO PCT/JP2008/000925 patent/WO2008129869A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| JP2008262821A (en) | 2008-10-30 |
| WO2008129869A1 (en) | 2008-10-30 |
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Open date: 20100217 |