CN1904689A - Radiator for light emission unit and backlight apparatus - Google Patents
Radiator for light emission unit and backlight apparatus Download PDFInfo
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- CN1904689A CN1904689A CN 200510109857 CN200510109857A CN1904689A CN 1904689 A CN1904689 A CN 1904689A CN 200510109857 CN200510109857 CN 200510109857 CN 200510109857 A CN200510109857 A CN 200510109857A CN 1904689 A CN1904689 A CN 1904689A
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Abstract
The invention supplies a radiator used for emitting unit. The emitting unit contains plural light emitting diodes that are installed on the basically same axis on the first main surface of a patch board. The radiator contains radiating board and heat pipe that are combined and having a first surface as combining surface toward the second main surface opposite to the first main surface of patch panel. Heat pipe installation section is set on radiator board. The heat produced by LED would be radiated to a radiator component.
Description
The related application of cross reference
The theme that the present invention includes relates to the Japanese patent application JP2004-136919 that submits to the Japanese Patent Laid Room on April 30th, 2004, and it is hereby incorporated by in full.
Technical field
The present invention relates to a kind of back lighting device, for example be arranged in transmission type lcd device (LCD) or the similar device, and relate to a kind of radiator that appends on this back lighting device.
Background technology
Compare with cathode ray tube (CRT), LCD is suitable for being designed to bigger display screen, lighter weight, thin shape, lower energy consumption or the like.Therefore, LCD for example has been used for televisor and multiple display with emissive type PDP (plasma display panel).LCD has liquid crystal panel, and wherein sealing liquid crystal changes transmittance by the orientation that applies voltage change liquid crystal molecule, thereby selectively shows predetermined image between two transparency carriers of multiple size, or the like.
Because liquid crystal itself is not luminophor, thus for example provide a back light unit for LCD at the back of the body surface portion of display panels, as light source.Back light unit for example comprises primary light source, optical plate, reflectance coating, lens or scattering film, or the like, and display light is applied to the zone of whole liquid crystal panel.In back light unit, the cold cathode fluorescent lamp (CCFL) with mercury or xenon is sealed in the fluorescent tube, as primary light source; Yet still exist many problems to need to solve, for example the fluorescent brightness that has of cold cathode fluorescent lamp and the problem in life-span and the low brightness area that on cathode side, occurs and the illumination evening ratio problem that causes.
Therebetween, in a large scale liquid crystal display, a luminous configuration in zone (arealitconfiguration) back lighting device is provided usually, in this back lighting device, the back of the body surface of a scatter plate is provided with the cold cathode fluorescent lamp of a plurality of length, and this back lighting device provides display light for display panels.Equally, in the luminous configuration back lighting device in this zone, need to solve a plurality of problems of the above-mentioned cold cathode fluorescent lamp of mentioning, and particularly surpass in 40 inches the large-scale tv machine, emphasize to obtain the problem of higher brightness and higher illumination evening ratio more in size.
On the other hand, in the luminous configuration of air (air litconfiguration) back lighting device, it is backlight to focus on the luminous configuration in LED zone, and a plurality of red, green and blue look light emitting diodes (LED) wherein are set two-dimensionally, replaces above-mentioned cold-cathode fluorescence lamp.Under the situation of this LED background light, because the reduction of LED cost causes cost to reduce, and has exhibit high brilliance image and similar image on the large scale liquid crystal display of low energy consumption.
Summary of the invention
, in the LED-backlit device, a plurality of LED are set therebetween, and these LED produce a large amount of heats.Because the combination of LED-backlit device and liquid crystal panel, make the space segment that forms a sealing at the dorsal part of liquid crystal panel, thereby the heat that is produced is collected in the space segment of this sealing, make the display temperature rising.In addition, the LED-backlit device comprises aforesaid scatter plate and reflectance coating, owing to the temperature that raises produces distortion and sex change etc., causes the reduction of display precision in these optical thin films.
Therefore, in the LED-backlit device, the heat that provides a suitable Department of Radiation to assign to these LED generations of radiation.In the LED-backlit device, for example can consider by using a cooling fan that cooling draught is provided, satisfy the needs of the heat that radiation produces.Yet,, can not adopt so cooling draught directly blows to this configuration of scattering film and reflectance coating because this method causes having produced vibration or unconscious motion.
Therefore, in the LED-backlit device, can adopt a kind of irradiation structure, wherein the heat that is produced partly is delivered to a heating radiator from enclosure space, this heating radiator is formed by a suitable conducting-heat elements, is for example formed by an aluminium parts, thereby realizes the heat that produces is carried out radiation.Restricted condition in this LED-backlit device, promptly because conducting-heat elements can cover display light, so conducting-heat elements should not be set directly in the enclosure space, expectation is effectively with uniformly from this enclosure space partial radiation heat, this enclosure space part should be connected to heating radiator by the shortest route, thereby obtain effective heat radiation, or the like, yet the structure that is used to satisfy these conditions is complicated.In addition, in the LED-backlit device, can not suitably carry out under the thermal-radiating situation and not have on its whole zone under the situation that even temperature distributes, will produce the irregular phenomenon on the color for example at liquid crystal panel.
In the LED-backlit device, when heating radiator is directly linked distributing board or supported the backboard of distributing board, can obtain effective heat radiation, a plurality of LED for example are installed on distributing board.Yet in the LED-backlit device, the circuit unit that is used for driving LED or is used to control illumination etc. is installed to backboard.For the stable operation of these assemblies, in the LED-backlit device, may must provide suitable bracket component or like, for example be inserted between LED-backlit device and the backboard, be used to constitute heat insulating member and be used for isolating with heating radiator.The appearance of bracket component or like has increased the thickness of LED-backlit device, has reduced the efficient of assembly operation, or the like.
Therefore, need provide a kind of heating radiator of thin type structure, effectively the heat of a plurality of light emitting diodes generations of radiation.Equally, need provide a kind of back lighting device, wherein be provided with a plurality of light emitting diodes, be used to reach the brightness that strengthens display panel, the heat that produces of radiation light emitting diode group effectively makes uniformity of temperature profile on whole display panel areas, and can reach thin shape.
According to one embodiment of present invention, provide a radiator to be used for luminescence unit, radiator merges in the luminescence unit, and multiple light emitting diode is installed on the essentially identical axis on distributing board first first type surface in luminescence unit.Radiator comprises a radiant panel and a heat pipe, radiant panel has first first type surface as mating surface, combine with second first type surface with respect to first first type surface of distributing board, radiant panel is provided with the heat pipe assembled portion, described heat pipe assembled portion is in second first type surface of first first type surface of relative radiant panel, described heat pipe is installed in the heat pipe assembled portion, keeps simultaneously closely contacting with the inwall of heat pipe assembled portion.
Radiator is set is used for luminescence unit, described luminescence unit has multiple light emitting diode as light source, and highlighted luminous.In radiator, produce a large amount of heat by the illumination of light emitting diode operation, and the heat transferred that produces like this is to radiant panel, described radiant panel is made of the metal parts with thermal conductive resin, for example a kind of aluminum.In addition, in radiator, the heat pipe with high thermal conductivity is installed in the heat pipe assembled portion that is formed in the radiant panel, conducts heat radiation to a radiant section by effective through radiant panel and heat pipe thus.In addition, in radiator, heat pipe keeps closely contacting with the heat pipe assembled portion, thereby carries out the heat conduction from the radiant panel to the heat pipe effectively, and the heat of radiant section radiation light emitting diode generation.
According to another embodiment of the invention, provide a kind of back lighting device,, provide display light for display panel, make it possible to show suitable image etc. with high brightness from rear side with the transluscent display panel combination.Back lighting device comprises back light unit, radiating element and rear panel.In back lighting device, back light unit comprises distributing board and multiple light emitting diode, and described distributing board is with respect to the rear panel setting of display panel, and described multiple light emitting diode is installed on the essentially identical axis on the first type surface of distributing board.In back lighting device, radiating element comprises radiant panel, heat pipe and radiant section.The combination of described radiant panel has distributing board, its first type surface as mating surface towards with the first first type surface opposite second major surface of distributing board, and radiant panel is provided with the heat pipe assembled portion in itself and its first first type surface opposite second major surface; Described heat pipe is installed in the heat pipe assembled portion of radiant panel, keeps contacting with the tight of radiant panel inwall; Described radiant section is arranged on the side of periphery of display panel, and is connected to an end portion of heat pipe.In back light unit, radiant panel is installed to rear panel, with the first first type surface opposite second major surface as installation surface.
In back lighting device, light-emitting diode group has the multiple light emitting diode that is arranged in the back light unit, and light-emitting diode group is as light source, and light emitting diode enters the illumination operation, so that the display light of high power capacity is provided for transluscent display panel.In back light unit, radiating element is a large amount of heat of radiation effectively, these heats are operated in the space segment that produces and accumulate between back light unit and the transluscent display panel by the illumination of light emitting diode, thus, illuminate transluscent display panel under stable condition.In back lighting device, radiating element is the heat that produced by light emitting diode of radiation effectively, and transluscent display panel reaches a basic predetermined temperature uniformly on the whole surface of display panel, prevent colorific scrambling etc. thus, and can stablize ground display image etc. with high brightness.
In back lighting device, the heat that is produced is delivered to radiant panel, and described radiant panel is made of the metal parts with thermal conductive resin, for example aluminum.In back lighting device, radiant panel is provided with the heat pipe assembled portion, and the heat pipe with high thermal conductivity is installed in the heat pipe assembled portion, keeps simultaneously contacting with the tight of the latter.In back lighting device, by radiant panel and heat pipe with the heat transferred radiant section, the heat that the radiation light emitting diode group produces.
One embodiment of the present of invention according to above-mentioned preparation, according to the radiator that is used for luminescence unit, operate the heat that is produced by the illumination of multiple light emitting diode and be delivered to radiant section effectively by radiant panel and heat pipe, described radiant section is arranged on an independent position.Therefore, according to the radiator that is used for luminescence unit, can obtain a luminescence unit, and radiant section directly is not provided in the illuminating part office, described luminescence unit has multiple light emitting diode as light source, and by stably operating with high brightness luminescent.In addition, according to the radiator that is used for luminescence unit, heat pipe to be to be installed in the heat pipe assembled portion with the tight state of contact of heat pipe assembled portion that forms on radiant panel, makes it possible to reach the efficient of the refrigerating function of raising, and can reduce the thickness of luminescence unit.
In addition, in back light unit according to another embodiment of the invention, have the light-emitting diode group formed by multiple light emitting diode as light source by back light unit, make the display light of high power capacity offer transluscent display panel, can obtain the optical display of high brightness thus.In back lighting device, live part by the radiant panel of a large amount of heats of heat pipe cooling and absorbing with efficient cooling power, described heat is operated the space segment that produces and accumulate between back light unit and the transluscent display panel by the illumination of light emitting diode, obtain effective heat radiation thus, and allow transluscent display panel to carry out the optics demonstration with stable status.In back light unit, heat pipe is assemblied in the heat pipe assembled portion that is formed in the radiant panel, can reduce to have the thickness of the radiating element of high radiance thus, and can therefore obtain reducing of back lighting device integral thickness.In back lighting device, transluscent display panel keeps even temperature on its whole zone, prevent colorific unevenness thus, and obtains a stable demonstration.
Description of drawings
Fig. 1 is the decomposition diagram of the major part of transmission-type liquid crystal display panel according to an embodiment of the invention;
Fig. 2 is the vertical cross-section diagram of the major part of transmission-type liquid crystal display panel;
Fig. 3 is the planimetric map of a radiating element;
Fig. 4 is the skeleton view of the major part of a light-emitting block;
Fig. 5 is the vertical cross-section diagram of major part that comprises the otpical leaf piece of an optics bolt member;
Fig. 6 is the assembling perspective view of a luminous block and radiant panel;
Fig. 7 A and 7B are the assembling side elevations of a luminous block and radiant panel;
Fig. 8 from dorsal part watch, the skeleton view of the major part of transmission-type liquid crystal display panel;
Fig. 9 A and 9B are the performance plots of a radiating element, and described radiating element has heat pipe and heating radiator;
Figure 10 A and 10B are the performance plots of a radiating element, and described radiating element has heating radiator;
Figure 11 from dorsal part watch, the skeleton view of the major part of transmission-type liquid crystal display panel, described transmission-type liquid crystal display panel has the combination of cooling fan and heating radiator;
Figure 12 A and 12B are the planimetric maps of a major part, show the structure that cooling fan is installed to heating radiator;
Figure 13 from dorsal part watch, the skeleton view of the major part of transmission-type liquid crystal display panel, described transmission-type liquid crystal display panel has the another kind combination of heating radiator and cooling fan; With
Figure 14 is the skeleton view of the major part of a transmission-type liquid crystal display panel, and described transmission-type liquid crystal display panel uses heating radiator as arm part.
Embodiment
Now, will describe in detail below as embodiment of the invention transmission-type liquid crystal display panel 1 illustrated in the accompanying drawings.For example, transmission-type liquid crystal display panel 1 is as the display panel of televisor, and described televisor has 40 inches or bigger large display screen.As illustrated in fig. 1 and 2, transmission-type liquid crystal display panel 1 comprises liquid crystal panel unit 2 and back light unit 3, and back light unit 3 is combined in the dorsal part of liquid crystal panel unit 2, is used for providing display light to the rear portion.Liquid crystal panel unit 2 comprises the back members of frame 6 of preceding members of frame 4, liquid crystal panel 5 and the frame shape of frame shape, and back members of frame 6 is used for clamping by liner 2A, 2B, guiding parts 2C etc. the exterior circumferential part of liquid crystal panels 5 between it and preceding members of frame 4.
Though omitted detail drawing, but liquid crystal panel 5 has a kind of structure, wherein sealing liquid crystal is between first glass substrate and second glass substrate, first glass substrate is relative with certain interval by isolation pad etc. with second glass substrate, on liquid crystal, apply the orientation of voltage, thereby change transmittance with the change liquid crystal molecule.Liquid crystal panel 5 has a plurality of strip like transparent electrode, dielectric film and alignment films, is formed on the inside surface of first glass substrate.Liquid crystal panel 5 has a plurality of three-primary colours chromatic filters, overlayer, a plurality of strip like transparent electrode and alignment films, is formed on the inside surface of second glass substrate.Liquid crystal panel 5 has moveable diaphragm and phase retardation film, is connected to the surface of first glass substrate and second glass substrate.
In liquid crystal panel 5, the alignment films of being made up of polyimide is arranged on the direction with the liquid crystal molecule level, as an interface, moveable diaphragm and phase retardation film make the wavelength characteristic colour killing or are white, and the performance of chromatic filter reaches the effect of panchromatic demonstration, thereby obtains the colour demonstration of institute's image that receives etc.Attach, liquid crystal panel 5 is not limited to this structure, can be easy to adopt previously presented heteroid liquid crystal panel.
Back light unit 3 comprises luminescence unit 7, radiating element 8 and rear panel 9.Luminescence unit 7 is arranged on the dorsal part of above-mentioned liquid crystal panel unit 2, so that display light to be provided; Radiating element 8 is used for the heat that radioluminescence unit 7 produces; Rear panel 9 holds luminescence unit 7 and radiating element 8, and rear panel 9 constitutes an installing component with preceding members of frame 4 and back members of frame 6, is used to be installed to shell 33 (referring to Figure 14).Back light unit 3 has a kind of like this external dimensions with the rear surface of the whole area surface by the rear surface to liquid crystal panel unit 2, and two unit make up in this case, and promptly relative space segment selectively seals.
Back light unit 3 has luminescence unit 7, and luminescence unit 7 is made up of otpical leaf piece 10 and light-emitting block 11, and light-emitting block 11 has a plurality of light emitting diodes (hereinafter being called LED) 12.Otpical leaf piece 10 is oppositely arranged with the dorsal part of liquid crystal panel 5; Though omitted detail drawing, but otpical leaf piece 10 comprises that otpical leaf is stacked 13, scattered light guide plate 14 or scatter plate 15, reflector plate 16 etc., otpical leaf stacked 13 forms by a plurality of optical function thin slices of lamination, and a plurality of optical function thin slices for example are prism thin slice and scattering film.Though omitted detail drawing, but otpical leaf stacked 13 is constructed by a plurality of optical function thin slices of lamination, the optical function thin slice for example is a kind of function thin slice that is used to decompose display light, display light incides the polarized light assembly from luminescence unit 11 supplies and at liquid crystal panel 5, a kind ofly be used to compensate the phase of light wave difference with the expansion that reaches field-of-view angle and prevent the function thin slice that develops the color, a kind of function thin slice that is used for the scattering display light, or the like.Attach, the lamination of the optical function thin slice that otpical leaf stacked 13 is not limited to just mention, can also comprise that one is used to reach the brightness enhancement film that increases brightness, two and is used for upper and lower scattering film that phase retardation film is clipped in the middle or the prism film between that, or the like.
In scatter plate 15, use a kind of ink, by serigraphy or similar approach, on board plane with the printing of round dot pattern they and form chopping point 15a, described ink is by mixing a kind of opacifier and a kind of scattering diluent is prepared, opacifier for example is titanium dioxide and barium sulphate, and scattering diluent for example is glass powder and silicon dioxide.The light that the display light of supplying with from light-emitting block 11 passes chopping point 15a covers, and incides on the scatter plate 15.Before light escape to scattered light guide plate 14, scatter plate 15 was scattered in its inner incident display light.Scatter plate 15 is provided with the chopping point 15a with respect to LED12, thereby suppresses to be increased by the local luminance that causes from the incident of the display light of LED12, therefore before light escape to otpical leaf stacked 13, makes incident light more even.
As mentioned above, in otpical leaf piece 10, around being radiated from the display light of LED12 emission, prevent because display light is directly incident on the local luminance increase that causes on the scattered light guide plate 14.In otpical leaf piece 10, the display light around being radiated reflexes to this side of scattered light guide plate 14 by reflector plate 16, has reached the increase of optical efficiency thus.Reflector plate 16 for example is made of the foaming PET that comprises a kind of fluorescer (polyethylene terephthalate).The foaming PET material is characterised in that, it has about 95% high reflectance characteristic and from the tonal difference of metallic glossy color, and those defectives on reflecting surface are inapparent.Attach, reflector plate 16 for example also can be made up of the silver with mirror finish surface, aluminium, stainless steel or similar material.
Structure otpical leaf piece 10 makes that described light reflects when the part display light that leaves from LED12 incides scatter plate 15 with the angle that surpasses a critical angle on the surface of scatter plate 15.Structure otpical leaf piece 10, make the light reflect from the surface of scatter plate 15 and be radiated from LED12 around and by part display light interreflection between scatter plate 15 and reflector plate 16 of reflector plate 16 reflections, whereby because the principle of reflection that strengthens has caused the raising of reflectivity.
In otpical leaf piece 10, multiple optics bolt member 17 is set, the depth of parallelism between opposed major surfaces that accurately keeps scatter plate 15 on the whole zone and reflector plate 16, and the depth of parallelism between opposed major surfaces that accurately keeps scatter plate 15 on the whole zone and scattered light guide plate 14 thus.Optics bolt member 17 is the parts that are made of milky synthetic resin material monolithic, described synthetic resin material has photoconductive property and mechanical rigid and certain DE, for example, polycarbonate resin, and optics bolt member 17 is respectively installed on the 9a of mounting portion, shown in Fig. 2 and 5, fixed part 9a is integrally formed on the rear panel 9.
As shown in Figure 5, each optics bolt member 17 all comprises shaft-like essential part 17a, mounting portion 17b, the flange shape first dash receiver part 17c and the flange shape second dash receiver part 17d.Mounting portion 17b is formed on the end of shaft-like essential part 17a, the flange shape first dash receiver part 17c leaves predetermined distance of mounting portion 17b, centers on the external overall ground formation of shaft-like essential part 17a, and the flange shape second dash receiver part 17d leaves predetermined distance of the first dash receiver part 17c, centers on the external overall ground formation of shaft-like essential part 17a.In each optics bolt member 17, shaft-like essential part 17a is formed with a longitudinal length, determined the mounting portion 9b of plate 9 and the interval between the scattered light guide plate 14 in the back, and a step part 17e has been set, left the second dash receiver part 17d with predetermined height.
In each optics bolt member 17, shaft-like essential part 17a constitutes a kind of taper shape of extend longitudinally, reduces gradually to the end portion diameter from step part 17e, and the diameter of step part 17e is greater than the mounting hole 15b of scatter plate 15.In each optics bolt member 17, the position that makes progress a little of shaft-like essential part 17a step part 17e is provided with a vertical lightening hole 17f.Lightening hole 17f is formed in the part scope of shaft-like essential part 17a, and the outside diameter of described part is greater than the diameter of the mounting hole 15b of scatter plate 15, thereby generation is pooled to the trend of described part.
In each optics bolt member 17, the first dash receiver part 17c and the second dash receiver part 17d are provided with an interval, make the relative space of maintenance between scatter plate 15 and reflector plate 16.In each optics bolt member 17, these of shaft-like essential part 17a form the mounting hole 15b that diameter equals scatter plate 15 substantially corresponding to the part of the first dash receiver part 17c and the second dash receiver part 17d.In each optics bolt member 17,17b cross section, mounting portion all is sagittate, make the outside diameter of its end portion equal the diameter of the mounting hole 9c of rear panel 9 substantially, and its diameter is increased to the diameter greater than mounting hole 9c along the longitudinal gradually.In each optics bolt member 17, mounting portion 17b is provided with an opening 17g, assigns to end side from large-diameter portion and extends, with the trend that obtains to compile.
In optics bolt member 17, the interval between the first dash receiver part 17c of major diameter part and mounting portion 17b equals the thickness of rear panel 9 and the thickness of scatter plate 15 substantially.In optics bolt member 17, the diameter of the first dash receiver part 17c is greater than the mounting hole 15b of diffusion sheet 15, and the diameter of the second dash receiver part 17d is greater than the mounting hole 16a of reflector plate 16.
In otpical leaf piece 10, reflector plate 16 is combined on the mounting portion 9b of rear panel 9, and mounting hole 9c and mounting hole 16a are oppositely arranged.In otpical leaf piece 10, the mounting portion 17b of each optics bolt member 17 all from behind the first first type surface 9d of plate 9 be pushed among the mounting hole 16a of reflector plate 16.In otpical leaf piece 10, mounting portion 17b tightens up under the action of opening 17g, be passed in the mounting hole 9c of rear panel 9 sides, be returned to the state of a nature subsequently, prevent that thus each optics bolt member 17 from coming off, and each optics bolt member 17 is installed on the 9b of mounting portion with upright state.
In otpical leaf piece 10, as shown in Figure 5, each optics bolt member 17 is clamped mounting portion 9b and reflector plate 16 on the thickness direction between its mounting portion 17b and its first dash receiver part 17c, thereby keeps reflector plate 16 with the state with respect to rear panel 9 location.In otpical leaf piece 10, in this case, promptly these of shaft-like essential part 17a protrude from reflector plate 16 in the part of the upside of the first dash receiver part 17c, and each optics bolt member 17 all stands upright on the mounting portion 9b of rear panel 9 so.
In otpical leaf piece 10, scatter plate 15 combines with optics bolt member 17, and mounting hole 15b is respectively by corresponding end portion 17h assembling.In otpical leaf piece 10, each optics bolt member 17 all has the major diameter part of tightening up under the action of lightening hole 17f, promotes scatter plate 15 thus along the longitudinal direction.In otpical leaf piece 10, scatter plate 15 strides across the step part 17e of each optics bolt member 17 and abuts against on the second dash receiver part 17d of each optics bolt member 17, is clipped in thus between the step part 17e and the second dash receiver part 17d of each optics bolt member 17.
In otpical leaf piece 10, shown in Figure 4 and 5, the shaft-like essential part 17a of each optics bolt member 17 is projecting inward from scatter plate 15 in these parts of the upside of the second dash receiver part 17d.In otpical leaf piece 10, it is stacked 13 that scattered light guide plate 14 has the otpical leaf of lamination, is installed in the terminal 17h of each optics bolt member 17, and its bottom end surface side abuts against on the end portion 17h.
In the otpical leaf piece 10 of as above constructing, multiple optics bolt member 17 is installed on the first first type surface 9d of rear panel 9, by simple method, being about to mounting portion 17b is pushed among the mounting hole 9c, locate scatter plate 15 and reflector plate 16, and be used for accurately remaining on space and the space between scattered light guide plate 14 and otpical leaf stacked 13 between scatter plate 15 and the reflector plate 16.In as otpical leaf piece 10, owing to be provided with above-mentioned a plurality of optics bolt member 17, thus reduced the location structure of complexity and the needs that keep structure at interval, and the assembling process that can obtain to simplify.Optics bolt member 17 can compatible be used for the liquid crystal panel 5 of different size, and can use general parts.
In addition, optics bolt member 17 is not limited to above-mentioned structure, can suitably revise the ad hoc structure of its each several part based on the structure of otpical leaf piece 10.Though optics bolt member 17 designs like this, for example, by opening 17g is provided, mounting portion 17b provides the trend of compiling, and by among the mounting hole 9c that is pushed into rear panel 9 mounting portion 17b being installed, but also can adopt a kind of structure, for example wherein, optics bolt member 17 partly locates integrally to be provided with a slip-off preventing bossing in its exterior circumferential, optics bolt member 17 be assembled to one within it portion's periphery office be provided with on the mounting hole 9c of keyway, and optics bolt member 17 rotates, in case anti-avulsion falls.
In otpical leaf piece 10, accurately locate each parts, the guiding of display light, scattering, reflection and similar processing are stably carried out in photoconduction space segment H thus, photoconduction space segment H is configured between scattered light guide plate 14 and the emission sheet 16, thereby has suppressed the generation of color scrambling in liquid crystal panel 5.In otpical leaf piece 10, each the optics bolt member 17 that is arranged in the photoconduction space segment H all is made of milky leaded light synthetic resin material, and scattering is incided its inboard display light from its exterior circumferential surface, thereby prevent the display brightness of its end portion 17h part, display light incides on the scattered light guide plate 14 equably from photoconduction space segment H thus.
Therebetween, as shown in Figure 3, optics bolt member 17 in otpical leaf piece 10 is set to a matrix, be included in 5 and 3 in column direction in the line direction, promptly have 15 altogether, and optics bolt member 17 be arranged on light-emitting block 11 these the row between the position on, light-emitting block 11 comprise 6 the row LED12, this will be explained below.In addition, in otpical leaf piece 10, above-mentioned scatter plate 15 has different characteristic in its positive side with rear side with reflector plate 16, makes it is made up and must can not make a mistake positive side and rear side.
As mentioned above, scatter plate 15 and reflector plate 16 are provided with mounting hole 15b and 16a, and the shaft-like essential part 17a of optics bolt member 17 will pass them.Corresponding to optics bolt member 17, scatter plate 15 and reflector plate 16 are provided with mounting hole 15b and 16a with matrix-style, are included in 5 holes and 3 holes in column direction in the line direction, i.e. 15 holes altogether.In otpical leaf piece 10, as shown in Figure 3, delegation stands upright on the position of rear panel 9 from second optics bolt member 1 7A of left-hand digit below, shown in the position be different from the above second optics bolt member 17 of two row.In otpical leaf piece 10, corresponding to optics bolt member 17A, scatter plate 15 and reflector plate 16 are provided with in the delegation below from second mounting hole 15b of left-hand digit and 16a, and its position is different from those mounting holes 15b and the 16a of two row in the above.
Therefore, in otpical leaf piece 10, when scatter plate 15 and reflector plate 16 are arranged with mistake about positive side and rear side, because mounting hole 15b and 16a do not appear at the position corresponding to optics bolt member 17A, so can not combination scattering plate 15 and reflector plate 16; Thereby obtained a wrong combination and prevented structure.Attach, in otpical leaf piece 10, can prevent that the scatter plate 15 of structure and the mounting hole 15b in the reflector plate 16 and 16a are arranged on other position with optics bolt member 17A with being configured with wrong combination, rather than the center; Yet, preferably they are arranged on interior location, rather than the exterior circumferential position, because each parts can both make up with stable status, and they can be arranged on a plurality of positions, rather than only on a position.
In back light unit 3,, incide effectively on the liquid crystal panel unit 2 with stable status from the display light of the LED12 emission of light-emitting block 11 because luminescence unit 7 comprises above-mentioned otpical leaf piece 10.As shown in Figure 3, light-emitting block 11 comprises six row light emitting array 11A to 11F, and light emitting array 11A is to 11F arrangement in a lateral direction on the first first type surface 9d of plate 9 in the back.In addition, luminescence unit 11 makes each light emitting array 11A comprise all that to 11F three luminous block 18A (A is to C) to 18F (A is to C), describe in detail later on, and they are arranged in a longitudinal direction, make luminescence unit 11 comprise 18 luminous blocks 18 altogether.Attach, in the following description, unless represent luminous block 18A (A is to C) respectively to 18F (A is to C), they all will generally be called luminous block 18.
Shown in Fig. 4 and 6, each luminous block 18 comprises a plurality of red LED and green LED and blue LED (generally being called LED12) and horizontally extending rectangle distributing board 19, distributing board 19 has the first first type surface 19a, and LED12 is installed on first type surface 19a sequentially in a longitudinal direction.On each luminous block 18,25 LED12 altogether are installed, include red LED and the green LED and the blue LED of right quantity.Therefore, light-emitting block 11 comprises 450 LED12 altogether, and wherein 75 LED12 appear at each light emitting array 11A in 11F.Attach, in light-emitting block 11, the quantity of the quantity of luminous block 18 and the LED12 that is mounted thereon is preferably determined according to the size of display screen, the luminescent properties of each LED12 etc.
Though do not illustrate in the accompanying drawing, luminous block 18 has a kind of structure, that is, the wiring pattern of the LED12 that wherein is used to be connected in series, the solder joint etc. that is used to connect the terminal of LED12 are formed on the first first type surface 19a of distributing board 19.Construct these wiring boards 19 with identical specification, and each wiring board 19 all comprises one first terminals 20A being mounted thereon the signal outgoing side and at one second terminals 20B of signal input side, their installation site is adjacent to the side part 19b on the Width of the first first type surface 19a, and on the both sides of longitudinal direction.Though omitted detail drawing, the first terminals 20A is the signal outlet terminal, for example comprises one 6 needle construction.In addition, though omitted detail drawing, the second terminals 20B is the signal input terminal, for example comprises one 5 needle construction.
Light-emitting block 11 has a kind of structure, that is, wherein as shown in Figure 3, three luminous block 18AA are arranged in the longitudinal direction of the first row light emitting array 11A to 18AC, and every distributing board 19 all has a side part 19b simultaneously, towards downside.In light-emitting block 11, three luminous block 18BA are arranged in the longitudinal direction of the second row light emitting array 11B to 18BC, and every distributing board 19 all has a side part 19b simultaneously, towards the side of light emitting array 11A.In light-emitting block 11, equally for other light emitting array 11C to 11F, have three luminous blocks 18 to be arranged on similarly in the longitudinal direction respectively, the while direction of every distributing board 19 all replaces opposite.
In light-emitting block 11, luminous block 18AC is arranged on each light emitting array 11A in voluntarily to the right side of 11F to 18FC, separately the second terminals 20B formation stimulus part of luminous block 18AC in the 18FC, be used for each voluntarily in driving LED 12.In light-emitting block 11, as shown in Figure 4, the first terminals 20A is in a side of each luminous block 18, and the second terminals 20B is at opposite side, and luminous block 18 is in abutting connection with relative, and the first terminals 20A is relative with second terminals 20B adjacency.In light-emitting block 11, the other end of the first link 20A and the second link 20B links to each other by link lead (not shown), thereby obtains the shortest lead.In light-emitting block 11, based on each light emitting array 11A to 11F, the signal output lead 21 of terminals is derived to 18FA from the luminous block 18AA that is arranged on the left side, and be directed to light emitting array 11A as shown in Figure 4 to the position between the 11F, use the clamper 22 that is provided with to tie up respectively, and by deriving the side that opening 23 exports to the second first type surface 9e of rear panel 9.
In light-emitting block 11, though do not illustrate, be based on each light emitting array 11A to 11F, the signal input lead of terminals be connected respectively to be arranged on the right side luminous block 18AC to 18FC.The signal input lead side of the second first type surface 9e of plate 9 from behind passes through to derive opening 23, and is banded in light emitting array 11A to the 11F by clamper 22, and is connected to luminous block 18AC to 18FC.In light-emitting block 11, the light-emitting block 18 in paired light emitting array (11A, 11B), (11C, 11D), (11E, 11F) is provided with their the first terminals 20A and the second terminals 20B, is arranged on the distributing board relative to one another.
In light-emitting block 11, as mentioned above, by for signal I/O lead 21 provides a kind of maintenance and guide frame, having improved space efficiency thus and simplified the distribution step at interval to use between the 11F at light emitting array 11A.In light-emitting block 11, the relevant position of the first terminals 20A and the second terminals 20B has prevented the mistake installation of distributing board 19, has simplified distribution structure and distribution step between the distributing board 19, and can use general lead.In light-emitting block 11, can carry out simply around the laying of the lead 21 of the second first type surface 9e side of rear panel 9.Attach, in light-emitting block 11, signal output lead and signal input lead are tied up them by clamper 22 and are led, and make lead cooperatively interact to suppress noise.
In luminous block 18, as mentioned above, one has on the first first type surface 19a that 25 LED12 are installed in distributing board 19, and combination has red LED and the green LED and the blue LED of right quantity, with this series arrangement on same axis.Each LED12 has a kind of structure, and shown in Fig. 7 A, light-emitting device 12a is kept by resin retainer 12b, and terminal 12c derives from resin retainer 12b.
In light-emitting block 11, in case each LED12 of luminous block 18 carries out light emission operation, just send display light, and produce heat.As mentioned above, luminescence unit 7 has a kind of structure, promptly, wherein light-emitting block 11 combines with the rear side of otpical leaf piece 10, and constitute the photoconduction space segment H of a sealing on every side, make a large amount of heat built-up that multiple LED12 produces at photoconduction space segment H, and produced a hot conditions.In luminescence unit 7, the rising of temperature has produced various problems, for example changed the characteristic of the optically thin film body of otpical leaf piece 10, make the luminescent condition instability of each LED12, cause the scrambling etc. of the color in liquid crystal panel 5 and make the fluctuation of service of the former parts of electronics of forming circuit part.
In back light unit 3, the heat that LED12 produces has suppressed the problems referred to above thus by radiating element 8 radiation effectively of luminescence unit 7.Radiating element 8 is made up of heating radiator 26A and the 26B (after this generally being called heating radiator 26) and the cooling fan 27 etc. of six radiant panel 24A to 24F (after this generally being called radiant panel 24), six roots of sensation heat pipe 25A to 25F (after this generally being called heat pipe 25), about a pair of.Radiant panel 24A is provided with to 11F based on each light emitting array 11A to 24F, and also is used as the installing component of luminous block 18; Heat pipe 25A is respectively installed on the radiant panel 24 to 25F; The two ends of heat pipe 25 are connected on heating radiator 26A and the 26B; Cooling fan 27 is used to promote heating radiator 26 refrigerating functions.As described below, radiating element 8 has the heat pipe 25 of integral installation to each radiant panel 24, makes to form an effective heat conduction path, is used to conduct heat to heating radiator 26.
By using aluminum to constitute radiant panel 24, aluminum has fabulous thermal conductivity, good workability, light weight and is cheap, constitute radiant panel 24 by the rectangular plate shape shape that is squeezed into extension, radiant panel 24 have with above-mentioned those light emitting arrays 11A that mentions to essentially identical length of 11F and width.Each radiant panel 24 is also all as being used for the mounting portion of luminous block 18, and forms and have predetermined thickness and have mechanical stiffness.Attach, radiant panel 24 is not limited to aluminum, and can be made of other material with thermal conductive resin, for example aluminum alloy materials, magnesium alloy materials, silver alloy, Cu alloy material, or similar material.The size of radiant panel 24 is relatively little, is shaped by suitable job operation, and for example, press process, cut out or cut, or the like.
In radiant panel 24, shown in Fig. 6 and 7A, the distributing board 19 of luminous block 18 adjoins each other by their terminal surface combination mutually in a longitudinal direction, and the first first type surface 24a is as a lamination surface.Radiant panel 24 has the first first type surface 24a, and the first first type surface 24a has a substrate assembling female parts 24b on its whole length, distributing board 19 wherein is installed.In radiant panel 24, substrate assembling female parts 24b has and the identical width of distributing board 19 substrates, height with the thickness that equals distributing board 19 substantially, and the combination distributing board 19 is arranged, support one second first type surface 19c and the both sides of the edge part on the Width of distributing board 19 simultaneously.In radiant panel 24, combination has the distributing board 19 of substrate assembling female parts 24b to be fixed on the first first type surface 24a by a plurality of installation screw rods 28.
In radiating element 8, heat pipe assembled portion 24g is formed on the whole length on the longitudinal direction of the second first type surface 24f side of radiant panel 24, makes a heat pipe 25 is installed there; In this case, in order further to improve radiation efficiency, for example, two or more heat pipes 25 can be installed to radiant panel 24.Because many heat pipes 25 are installed can be owing to influencing each other between heat pipe 25 causes reducing thermal conductivity to same position, so preferably two or more there heat pipe assembled portion 24g are used for installing respectively a heat pipe 25, and be formed in the second first type surface 24f with being parallel to each other adjacency.
In radiating element 8, if two or many heat pipes 25 for example have been installed to radiant panel 24, on heat transfer efficiency, can show little difference owing to have the heat pipe 25 of various outer diameter so, so that these heat pipes 25 have identical diameter.By this measure, when handling heat pipe 25, the routine that can obtain these assemblies is used, and prevents wrong the installation, or the like.
In radiating element 8, a heat pipe 25 is installed among the heat pipe assembled portion 24g that is formed in each radiant panel 24.In radiating element 8, structure based on transmission-type liquid crystal display panel 1, it may be this situation, the mounting portion that for example wherein is used for assembly etc. must be formed on the center section of heat pipe assembled portion 24g, and wherein heating radiator 26 can not flatly be arranged on left side and right side, therefore heat pipe 25 becomes on length greatly, causes having reduced heat transfer efficiency in its end portion.In radiating element 8, the heat pipe 25 by from left side and two weak points of right side assembling can be installed in them in the heat pipe assembled portion 24g.
In radiating element 8, as mentioned above, each radiant panel 24 all is provided with heat pipe assembled portion 24g, heat pipe 25 is installed in the inboard of heat pipe assembled portion 24g, heat pipe 25 is arranged on the position of relatively approaching LED installation region 19d thus, and LED installation region 19d is the highest parts of distributing board 19 heating.In radiating element 8, use radiant panel 24 with predetermined thickness.Radiant panel 24 is provided with heat pipe assembled portion 24g, top in heat pipe assembled portion 24g and the interval (thickness) between the receiving plane 24c approximately are 1mm, for example, be installed in LED12 on the distributing board 19 thus and have about 1.7 to 1.8mm thickness, and heat pipe 25 is oppositely arranged with the interval that is no more than 2mm, thereby has obtained effective heat radiation.
In radiating element 8, have be installed in the heat pipe 25 among the heat pipe assembled portion 24g radiant panel 24 also as a holding member that is used for heat pipe 25, thereby simplified the processing of opposite heat tube 25 when assembling waits, and prevented bending, breakage etc.In radiating element 8, each radiant panel 24 all has luminous block 18 and heat pipe 25, makes up under mutual location and close condition, makes to form an effective thermally conductive pathways between luminous block 18 and heat pipe 25.In radiating element 8, simplified the step that heat pipe 25 is installed to radiant panel 24.
In radiating element 8, under this condition, be that luminous block 18 is installed in the heat pipe assembled portion 24g with 24b combination of substrate assembling female parts and heat pipe 25, every radiant panel 24 is all accurately located by erection bolt part 24h and register pin 24i, is fixed to thick panel 9.Attach, each radiant panel 24 can be used for fixing the erection bolt 28 of distributing board 19 by use, is fixed on the first first type surface 9d of rear panel 9.
Though radiant panel 24 is provided with the female parts of heat pipe assembled portion 24g as the arch cross section, make it to form high dimensional accuracy by extruding, heat pipe assembled portion 24g is not limited to this shape.Heat pipe assembled portion 24g can be fabricated to by assembling and keep heat pipe 25 and maintenance closely to contact with the periphery of heat pipe 25; Heat pipe assembled portion 24g can form a kind of suitable form, for example, have the square-section shape, be formed with multiple indent and protrude the female parts of striped, or the like.
Therebetween, in radiant panel 24, be installed in heat pipe 25 in the heat pipe assembled portion 24g and push with the inwall of heat pipe assembled portion 24g by rear panel 9 and closely contact.Yet, have a kind of situation, promptly owing to the dimensional accuracy of for example each several part, the dimensional accuracy of rear panel 9 etc., the part has produced the space between inwall and heat pipe 25, has reduced thermal conductivity.Thus, in radiant panel 24, can adopt a kind of structure, that is, for example wherein heat pipe 25 is clogged heat pipe assembled portion 24j by a packed configuration, shown in Fig. 7 B.
In radiant panel 24, heat pipe assembled portion 24j is formed with a degree of depth that equals the external diameter of heat pipe 25 substantially, and whole filling projection 24k, the 24l that is provided with on its whole length of relative edge of opening part of heat pipe assembled portion 24j.Filling projection 24k, 24l can be formed on arbitrary edge of opening part of heat pipe assembled portion 24j, or can locally form.For example, be formed under the situation of relative edge of opening part in filling projection 24k, 24l part, can be with alternately staggered pattern setting.
In radiant panel 24, under the condition in heat pipe 25 is installed in heat pipe assembled portion 24j, promptly shown in the dot-and-dash line among Fig. 7 B, heat pipe assembled portion 24j is advanced in filling projection 24k, 24l bending.In radiant panel 24, filling projection 24k pushes heat pipe 25 with the inwall of heat pipe assembled portion 24j with 24l and closely contacts.Can obtain the integrated of tool radiant panel 24 and heat pipe 25 more safely, and can also obtain rear panel 9 and contact with the tight of radiant panel 24.
In radiant panel 24, heat pipe assembled portion 24g, 24j form towards the second first type surface 24f, and heat pipe 25 installs in the second first type surface 24f side, but this structure is not restrictive.In radiant panel 24, a heat pipe pilot hole opening end at least in a longitudinal direction forms, and heat pipe 25 can be installed in the heat pipe pilot hole.In addition, in radiant panel 24, heat pipe assembled portion opening can be formed on an end face or a plurality of end on the Width.
Heat pipe 25 is parts, be generally used for conducting the heat that power supply sends, take interior high temperature such as a plurality of electric devices to radiant section, heat pipe 25 is by duct member of emptying and be configured for this duct member filling heat-conducting medium, described duct member is made of the outstanding metal material of thermal conductivity, copper for example, and described heat-conducting medium evaporates under predetermined temperature, water for example, heat pipe 25 has the effective capacity of heat transmission.As mentioned above, heat pipe 25 integral installations and are connected on the heating radiator 26 in two end portion with radiant panel 24 to every radiant panel 24.In heat pipe 25, in case receive the heat that transmits from the high temperature side of radiant panel 24, the heat-conducting medium that is sealed in heat pipe 25 inboards is a gas by liquid evaporation just.In heat pipe 25, the heat-conducting medium after the evaporation flows to a coupling part that is connected with heating radiator 26 at low temperature side by this pipe, there it is cooled to liquefaction, discharges the heat of cohesion simultaneously.In heat pipe 25, the heat-conducting medium of liquefaction utilizes capillary action, by multiple groove or porous layer that is formed in the inner wall of metal tube, flows to radiant panel 24 1 sides, causes this medium to circulate in pipe, has shown heat conduction function efficiently thus.
As mentioned above, heat pipe 25 integral installations provide it according to each light emitting array 11A to 11F thus in the heat pipe assembled portion 24g of radiant panel 24, and heat pipe 25 is relative with luminous block 18.Heat pipe 25 is installed among the heat pipe assembled portion 24g, and its a part of periphery is outstanding from opening portion.By the radiant panel 24 that is installed to rear panel 9, push the outshot of heat pipe 25 inboard of heat pipe assembled portion 24g to, shown in the arrow among Fig. 7 A, the periphery of heat pipe 25 is closely contacted with the inwall of heat pipe assembled portion 24g.As mentioned above, heat pipe 25 is installed to radiant panel 24, and need not holding member, and heat pipe 25 remains among the heat pipe assembled portion 24g under the situation of closely contact.General, by using silicones etc., heat pipe 25 is attached to its mounting portion, be used between it and radiation component, keeping the closely proterties of contact; Yet said structure has been eliminated the needs to the method for using grease.
Attach, by radiant panel 24 is used the packed configuration shown in above Fig. 7 B or is installed to inboard structure, heat pipe 25 can more safely make up with reflecting plate 24.
In radiating element 8, heat pipe 25 integral installations with high-efficiency heat conduction performance are to the radiant panel 24 of as above constructing, and heat pipe 25 extends below thus, and approaches the array region as the LED12 of pyrotoxin.In radiating element 8, carry the LED12 that is mounted thereon distributing board 19, keep the radiant panel 24 and the heat pipe 25 of distributing board 19 to lay mutually in intimate contact mutually, to construct a heat conductor that is used to conduct heat to heating radiator 26.In radiating element 8, obtained space efficiency by a kind of like this structure, and the heat that LED12 produces is delivered to heating radiator 26 very effectively, and therefore discharge, the temperature that has reduced thus in photoconduction space segment H rises, and back light unit 3 steady operations are for liquid crystal panel 5 provides display light.
In radiating element 8, as shown in Figure 8, heating radiator 26 is installed on the position of vertical both sides of secondary principal plane 9e of rear panel 9.Heating radiator 26 also can use separately, or uses with heat pipe 25, and as a kind of radiation component, the power supply unit that is used in the different electrical installations etc. grades.Heating radiator 26 is a kind of parts that are provided with big surf zone, the formation by using multiple heat dissipation sheet integral body it, heat radiator is to be made of the aluminum with excellent thermal conductivity etc.Heating radiator 26 receives from the heat of high-temperature part side conduction, and the surface of this part heat from heat radiator discharged, thus the cooling down high-temperature part.
Because size is bigger, heating radiator 26 has shown higher heat radiation effect, but the thickness and the size heating radiator 26 that have increased back light unit 3 or device integral body like this are large scale and heavy weight assembly, and for example under the situation that it directly is put into distributing board etc., because need mounting bracket parts and conducting-heat elements, so heating radiator 26 complex structures, described mounting bracket parts are used for keeping insulation between heating radiator and circuit unit, Wiring pattern etc., and conducting-heat elements is inserted between heating radiator and the high-temperature part.
In radiating element 8, by being set to dexterously on the rear panel 9, the big heating radiator 26 and multiple radiant panel 24 and the heat pipe 25 that need said method are provided, have suppressed the increase of size thus, thereby effectively discharged the heat of the multiple LED12 generation of luminescence unit 7.In radiating element 8, the above-mentioned structure of radiant panel 24 and heat pipe 25 has been eliminated to rear panel 9 provides the needs of fluctuating female parts along heat pipe 25 placement of route, and making as a whole rear panel 9 thus can be with straight shape setting.In radiating element 8, as mentioned above, heating radiator 26 is installed to the position, the left and right sides on the second first type surface 9e of flat rear panel 9, and the middle section of plate 9 forms a straight part in the back thus.
Therebetween, rear panel 9 forms with the rectangular plate shape shape that level prolongs, and has the size of the outer shape that equals liquid crystal panel 5 substantially, and rear panel 9 for example constitutes with the aluminum with mechanical stiffness by having light relatively weight.Rear panel 9 itself has thermal conductivity, thereby has the function of the heat of generations such as discharging photoconduction space segment H, circuit unit.As mentioned above, rear panel 9 is provided with the peripheral wall part 9a that makes up with preceding members of frame 6 at its periphery, be used to install the multiple mounting portion 9b of optics bolt member 17, be used for fixing the mounting hole of radiant panel 24 or be used to draw the derivation opening 23 of lead 21, or the like.The stacked combination in front side of radiating element 8, luminescence unit 7 and liquid crystal panel 5 and rear panel 9, and rear panel 9 is installed to the mounting portion of shell 33.
As shown in Figure 8, transmission-type liquid crystal display panel 1 is provided with control circuit encapsulation and rear panel 9, and the control circuit encapsulation is used to drive the illumination operation of the LED12 of liquid crystal panel 5 and luminescence unit 7, and rear panel 9 is also as the panel that these control circuits encapsulate is installed.Though omitted detail drawing, but the control encapsulation comprises liquid-crystal controller 29, power control unit 30A and 30B and LED control module 31A and 31B, liquid-crystal controller 29 is used for operating control signal is outputed to liquid crystal panel 5, power control unit 30A and 30B are used to control the power unit of liquid crystal panel 5 and luminescence unit 7, and LED control module 31A and 31B are used to control the operation of luminescence unit 7.
In transmission-type liquid crystal display panel 1, the second first type surface 9e of rear panel 9 is provided with the heating radiator 26A of setting about as mentioned above and the flat site between the 26B, and above-mentioned control circuit encapsulation 29 to 31 is installed in this flat site.In transmission-type liquid crystal display panel 1, control circuit encapsulation 29 to 31 is installed on the flat area, by simple steps they can be installed firmly thus, and does not promote, or the like.In transmission-type liquid crystal display panel 1, control circuit encapsulation 29 to 31 is thinner than the thick heating radiator of large scale 26, makes the thin structure that can keep transmission-type liquid crystal display panel 1 integral body.
Attach, control circuit encapsulation 29 to 31 is installed on the control basal plate (not shown), and this control basal plate is installed on the rear panel 9.As described below, this control basal plate is installed to rear panel 9 on a position between the heating radiator 26, and heating radiator 26 is arranged on the both sides of rear panel 9.
In transmission-type liquid crystal display panel 1, as mentioned above, provide the large scale screen, and display light is applied to liquid crystal panel 5 from light source, light source is made up of the multiple LED12 in luminescence unit 7.Transmission-type liquid crystal display panel 1 is provided with the radiant panel 8 of structure as mentioned above, and the heat of LED12 generation is delivered to heating radiator 26 effectively by radiant panel 24 and heat pipe 25 thus, and therefore discharges, thereby prevents in the huge thermal capacitance of photoconduction space segment H inner accumulated.In transmission-type liquid crystal display panel 1, the characteristic that keeps each optical sheet, and the large scale screen of liquid crystal panel 5 is maintained basic even temperature distribution, can obtain the unevenness of uniform image and removal color thus, and operation control circuit encapsulation stably 29 to 31.
Fig. 9 A, 9B, 10A and 10B show the radiation characteristic test result of first and second radiating elements.First radiating element is made up of the conducting-heat elements and the heating radiator of heat pipe combination, and second radiating element is made up of conducting-heat elements and heating radiator.Carry out this test by a kind of method, in the method, the DDC heating radiator that adds 34W on it separates from the centre, only is the right side on the left side, and under this condition, at terminal part office, left and right sides thermometric, and measures middle body a period of time.In first radiating element, shown in Fig. 9 A, temperature integral body is along with the time rises gradually, but the temperature difference between the various piece really is under the interior stable condition of 1 ℃ of scope.In addition, in first radiating element, shown in Fig. 9 B,, obtained the conduction of heat effectively of heating radiator, on whole zone, kept constant substantially Temperature Distribution thus by conducting-heat elements and the heat pipe of partly locating in the left distal end that does not have heating radiator equally.
On the other hand, in second radiating element, shown in Figure 10 A, temperature integral body is along with the time rises gradually, the right end part that is provided with heating radiator is because the radiation effects of heating radiator suppresses temperature and raises, and therefore the temperature difference between right end part and left distal end part increases gradually.In second radiating element, for example show between right end part and left distal end part and be not less than 7 ℃ temperature difference, shown in Figure 10 B in the Temperature Distribution after 26 hours.Therefore, in radiating element, the conducting-heat elements of heat pipe and the structure of heating radiator combination are arranged, effectively heat is delivered to heating radiator from high-temperature part, and therefore discharges, and the even temperature that has obtained on whole zone distributes by combination.
In radiating element 7, each heating radiator 26 is combined with cooling fan 27 as mentioned above, has obtained the radiation efficiency that strengthens thus.Along with cooling fan 27 with the part of wind between the fan of each heating radiator 26, promoted heat radiation from fin surface.In radiating element 7, many cooling fan (27A, 27B), (27C, 27D) are respectively installed to heating radiator 26.By being installed to the positions such as shell of different electrical equipment etc., cooling fan 27 is general also as the cooling and the heat radiation devices of high-temperature part.Attach, each heating radiator 26 all is provided with like this, and every heat radiator of the special sealing of bonnet of the shell of the mounting portion by cooling fan 27 for example is provided for the passage of cooling draught thus.
Shown in Figure 12 A and 12B, cooling fan 27 by square box shape shell 27a, by a plurality of arm portion 27b be arranged on the electric motor units 27c of the middle body of shell 27a, the fan 27d that rotated by motor 27c etc. forms.Four angles of cooling fan 27 object 27a are provided with mounting portion 27e, and are provided with opening portion 27f, and opening portion 27f passes on thickness direction between an arm portion 27b.Shown in Figure 12 A, cooling fan 27 is installed under such condition, and promptly opening portion 27f is towards the opening 33a that forms on the bonnet of shell 33.Receive along with power supply on the electric motor units 27c of cooling fan 27, fan 27d rotates, and the side from opening portion 27f sucks air thus, and discharges at opposite side.Use vertical cooling fan as cooling fan 27.
By for example mounting portion 27e being tightened on big width mounting portion 26a, the 26a, cooling fan 27 is installed to the rear surface part of heating radiator 26, cooling fan 27 from opening portion 27f to the part air feed between the heat radiator of heating radiator 26, with cold sink and heating radiator 26.As shown in figure 11, each cooling fan all is installed to the basic middle body on the longitudinal direction of heating radiator 26, therefore cooling radiator 26 equably in vertical direction.
Therebetween, when cooling fan 27 is installed under this condition, promptly shown in Figure 12 B, the both sides of shell 27a are parallel with the direction of heat radiator, opening portion 27f is by mounting portion 26b, the 26b partial closure of heating radiator 26, reduced thus to the air blast of part between the heat radiator, and therefore reduced cooling effectiveness.Thus, cooling fan 27 is fixed under this condition, and promptly the both sides of shell 27a tilt 45 ° with respect to the direction of heat radiator, shown in Figure 12 A, opening portion 27f is relative with heat radiator on whole zone thus, has guaranteed more air blast, and has cooled off heating radiator 26 effectively.
In radiating element 7, as mentioned above, control circuit encapsulation 29 to 31 is installed on the flat site that is formed between the heating radiator 26, has obtained thin structure thus.In radiating element 7, when cooling fan 27 was installed on the rear surface of heating radiator 26, cooling fan 27 protruded into rear side, thereby can not show above-mentioned effect than thin structure fully.
Thus, in radiating element 7, as shown in figure 13, left and right sides heating radiator 26 can be respectively be made up of upper heat sink 26A1 and bottom heating radiator 26A2 and upper heat sink 26B1 and bottom heating radiator 26B2.In radiating element 7, upper heat sink 26A1,26B1 are relative with bottom heating radiator 26A2,26B2 to be installed on the rear panel 9, makes to maintain enough space between them, is used on the basic middle position on the short transverse cooling fan 32 being set.
As for cooling fan 32, two one sides among their 32A, 32B are arranged between heating radiator 26A1 of portion and the bottom heating radiator 26A2, and two opposite sides among their 32C, 32D are arranged between heating radiator 26B1 of portion and the bottom heating radiator 26B2.Cooling fan 32 is identical with above-mentioned vertical cooling fan 27 in essential structure, but they are called horizontal cooling fan, wherein in the peripheral side surface of shell 27a, be provided with an opening, air blast on a peripheral direction, and they directly are installed on the rear panel 9.Therefore, in radiating element 7, as shown in figure 13, cooling fan 32 is separately positioned between the heating radiator of separation, has suppressed the protrusion amount of the rear surface side of plate 9 from behind thus, and has obtained thinner structure.
Attach, as for cooling fan 32, not only can use aforesaid detailed content, wherein suck extraneous air and it is blown on the part between the heat radiator of heating radiator 26, and can use these contents, cooling fan 32 wherein is installed respectively oppositely, sucking-off air and be discharged into the outside on the part between the heat radiator of heating radiator 26.
In radiating element 7, a pair of as mentioned above left and right sides heating radiator 26 is installed on the rear panel 9.Heating radiator 26 integral body be formed with multiplely be parallel to each other relatively, by the small heat dissipating plate that aluminum constitutes, heating radiator 26 has demonstrated character shape when vertical segmentation.Therefore, as shown in figure 14, in display panels 1, opening portion 34 is formed on the part of shell 33, and heating radiator 26 is installed on the rear panel 9, makes an one end portion 26c be exposed to the outside by opening portion 34.
Though the foregoing description shows transmission-type liquid crystal display panel 1 as the display panel with 40 inches or bigger large scale TV machine, the present invention can be applied to multiple liquid crystal indicator with giant-screen.
It will be appreciated by those skilled in the art that in claims or its equivalent scope,, can carry out different modifications, combination, part combination and change according to designing requirement and other factors.
Claims (11)
1, a kind of radiator that is used for luminescence unit, radiator merges in the described luminescence unit, and luminescence unit comprises multiple light emitting diode, and multiple light emitting diode is installed on first first type surface of a distributing board on the essentially identical axis, and described radiator comprises:
Radiant panel combines with distributing board, have first first type surface as with the surface in contact of second first type surface, this second first type surface is relative with described first first type surface of described distributing board, and is provided with the heat pipe assembled portion; With
Heat pipe is installed in the described heat pipe assembled portion of described radiant panel, keeps simultaneously closely contacting with the inwall of described heat pipe assembled portion; Wherein
The heat that described light-emitting diode group produces is delivered to radiation component by described radiant panel and described heat pipe.
2, the radiator that is used for luminescence unit as claimed in claim 1, wherein said heat pipe assembled portion is arranged in the described radiant panel, form by the female parts that in second first type surface, is communicated with, described second first type surface is relative with described first first type surface, and described first first type surface constitutes described mating surface with respect to described distributing board.
3, the radiator that is used for luminescence unit as claimed in claim 2, wherein
Described radiant panel has a kind of structure, wherein said heat pipe assembled portion be formed with an external diameter that equals described heat pipe substantially the degree of depth and
Described second first type surface is installed on the rear panel, and the described heat pipe extruding that described thus rear panel will be assemblied in the described heat pipe assembled portion contacts with the described inner tight of described heat pipe assembled portion.
4, the radiator that is used for luminescence unit as claimed in claim 2, wherein
Described radiant panel is in the opening opposing edge part office of described heat pipe assembled portion, integral body be provided with the filling projection and
Carry out a kind of filling of each described filling projection that curves inwardly and handle, the described heat pipe extruding that will be assemblied in described heat pipe assembled portion thus closely contacts with the described inwall of described heat pipe assembled portion.
5, the radiator that is used for luminescence unit as claimed in claim 1, wherein
Described radiation component is arranged in the two side areas of second first type surface of described rear panel, and second first type surface is relative with first first type surface, described radiating element is installed on first first type surface and
By installation surface, a circuit unit is installed as the zone between described radiation component of described second first type surface.
6, a kind of back lighting device with the combination of transluscent display panel, provides display light from rear side for the whole zone of described display panel, comprising:
Back light unit comprises distributing board and multiple light emitting diode, and described distributing board is with respect to the rear panel of described display panel and be provided with, and described multiple light emitting diode is installed on first first type surface of described distributing board on the essentially identical axis;
Radiating element, with described distributing board combination, have as with first first type surface of the surface in contact of second first type surface, second first type surface is relative with described first first type surface of described distributing board, and radiating element comprises radiant panel, heat pipe and radiation component, described radiant panel is provided with the heat pipe assembled portion, described heat pipe is installed in and keeps simultaneously in the heat pipe assembled portion of described radiant panel closely contacting with the inwall of described heat pipe assembled portion, described radiation component is used to receive the heat from described radiant panel and described heat pipe, and described heat is produced by described light emitting diode; With
Rear panel, by utilize with the described first first type surface opposite second major surface as installation surface, radiant panel is installed on the described rear panel.
7, back lighting device as claimed in claim 6, wherein
Form with block provides described back light unit and described radiating element, and multiple described block is arranged on the rear surface of described display panel with a kind of form of row-column matrix, thereby constructs described back light unit; With
Described heat pipe is assembled in the described heat pipe assembled portion of multiple described block in a kind of mode that penetrates, multiple described block is in abutting connection with being arranged on line direction or the column direction.
8, back lighting device as claimed in claim 6, wherein each described radiating element all has a kind of structure, wherein said radiant panel is provided with described heat pipe assembled portion, described heat pipe assembled portion is made up of the female parts that is communicated with in second first type surface, described second first type surface is relative with described first first type surface, and described first first type surface is configured for the mating surface that combines with described distributing board.
9, back lighting device as claimed in claim 8, wherein
Described heat pipe assembled portion is formed in described second first type surface of described radiant panel, forms a degree of depth that equals the external diameter of described heat pipe substantially; With
Described second first type surface of described radiant panel is installed on the described rear panel, and the described heat pipe that is assembled to described heat pipe assembled portion is thus closely contacted with the inwall of described heat pipe assembled portion by described rear panel extruding.
10, back lighting device as claimed in claim 8, wherein
Each described radiating element all is provided with described heat pipe assembled portion, provides the described radiant panel that has towards the filling projection of edge of opening part by integral body, forms described heat pipe assembled portion; With
Carry out a kind of filling of each described filling projection that curves inwardly and handle, the described heat pipe extruding that will be assemblied in described heat pipe assembled portion thus closely contacts with the described inwall of described heat pipe assembled portion.
11, back lighting device as claimed in claim 6, wherein
Described radiation component is arranged in the two side areas of second first type surface of described rear panel, and second first type surface is relative with first first type surface, described radiating element is installed on first first type surface and
By utilizing the zone of described second first type surface between described radiation component, a circuit unit is installed as installation surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510109857 CN1904689A (en) | 2005-07-29 | 2005-07-29 | Radiator for light emission unit and backlight apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510109857 CN1904689A (en) | 2005-07-29 | 2005-07-29 | Radiator for light emission unit and backlight apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1904689A true CN1904689A (en) | 2007-01-31 |
Family
ID=37673984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510109857 Pending CN1904689A (en) | 2005-07-29 | 2005-07-29 | Radiator for light emission unit and backlight apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1904689A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102305371A (en) * | 2010-03-30 | 2012-01-04 | Skc哈斯显示器薄膜有限公司 | Diffusion bar with spacer collar ring |
| US8144286B2 (en) | 2007-03-08 | 2012-03-27 | Sharp Kabushiki Kaisha | LED backlight and liquid crystal display device |
| CN102734695A (en) * | 2011-03-30 | 2012-10-17 | Skc哈斯显示器薄膜有限公司 | Scattering clamp with integral optical spacing body |
| CN101532626B (en) * | 2008-03-13 | 2013-08-21 | 索尼株式会社 | Light-emitting-diode backlight device |
| CN103392092A (en) * | 2011-03-18 | 2013-11-13 | 夏普株式会社 | Illumination device, display device, and television reception device |
| CN106591777A (en) * | 2017-01-05 | 2017-04-26 | 利亚德光电股份有限公司 | Film plating tool and method of LED display screen |
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2005
- 2005-07-29 CN CN 200510109857 patent/CN1904689A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102606942B (en) * | 2007-03-08 | 2015-05-20 | 夏普株式会社 | Led backlight and liquid crystal display device |
| US8144286B2 (en) | 2007-03-08 | 2012-03-27 | Sharp Kabushiki Kaisha | LED backlight and liquid crystal display device |
| CN102606942A (en) * | 2007-03-08 | 2012-07-25 | 夏普株式会社 | Led backlight and liquid crystal display device |
| CN101573555B (en) * | 2007-03-08 | 2012-08-22 | 夏普株式会社 | Led backlight and liquid crystal display |
| CN102809091A (en) * | 2007-03-08 | 2012-12-05 | 夏普株式会社 | Led backlight and liquid crystal display |
| CN102809091B (en) * | 2007-03-08 | 2015-04-08 | 夏普株式会社 | Led backlight and liquid crystal display |
| CN101532626B (en) * | 2008-03-13 | 2013-08-21 | 索尼株式会社 | Light-emitting-diode backlight device |
| CN102305371A (en) * | 2010-03-30 | 2012-01-04 | Skc哈斯显示器薄膜有限公司 | Diffusion bar with spacer collar ring |
| CN103392092A (en) * | 2011-03-18 | 2013-11-13 | 夏普株式会社 | Illumination device, display device, and television reception device |
| CN103392092B (en) * | 2011-03-18 | 2015-08-12 | 夏普株式会社 | Lighting device, display unit, radiovisor |
| CN102734695A (en) * | 2011-03-30 | 2012-10-17 | Skc哈斯显示器薄膜有限公司 | Scattering clamp with integral optical spacing body |
| CN106591777A (en) * | 2017-01-05 | 2017-04-26 | 利亚德光电股份有限公司 | Film plating tool and method of LED display screen |
| CN106591777B (en) * | 2017-01-05 | 2019-11-08 | 利亚德光电股份有限公司 | The film coating jig and film plating process of LED display |
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