The light engine of liquid crystal projection apparatus
[technical field]
The present invention relates to a kind of light engine of liquid crystal projection apparatus, particularly relating to a kind of is the light engine of the liquid crystal projection apparatus of design focal point with compact.
[background technology]
General Portable liquid crystal projection apparatus, easy to carry for making, designer trends are researched and developed toward the direction of compactization of volume invariably, and with the volume downsizing, often supervene and remain further to be improved and the relevant issues that overcome, liquid crystal projection apparatus in the past 1 as shown in Figures 1 and 2, it roughly is that the light source of a projecting lamp 11 is introduced in the light engine 2 (optical engine), after light engine 2 processing, projection lens 20 by light engine 2 front ends projects, wherein projecting lamp 11 all can produce high heat with light engine 2 predetermined positions, its reason is because projecting lamp 11 is the spotlight with high light, can produce high heat, and high light is incident in the light engine 2 inner liquid crystal light valve image He Guang districts 27, also can produce heat, heat must be loose from, as can not effectively cooling off this assembly, light then cause the colors of image of projection and light all to spend performance degradation, heavy then will seriously damage this significant components, therefore respectively be arranged with first fan 12 and second fan 21 of a heat transmission in projecting lamp 11 rear sides and light engine 2 bottoms, by this first fan 12 heat that projecting lamp 11 is produced is detached from front to back, as for this second fan 21 are the liquid crystal light valve image He Guang districts 27 that cold air are blown into from lower to upper light engine 2 inside, and the heat of deriving this part by the top, make the temperature in light engine 2 inner liquid crystal light valve image He Guang districts 27 be obtained cooling, and the required power supply of single unit system running is supplied by a power-supply unit 13, this power-supply unit 13 gives the electronic circuit of projecting lamp 11 and system because of the need power supply, need be positioned at a space of reserving between projecting lamp 11 the place aheads and light engine 2 sides nearby, and this power-supply unit 13 also can produce heat, general also the need by aforementioned first fan 12 when detaching projecting lamp 11 hot gas, wish effectively to detach in the lump the heat that this power-supply unit 13 is produced, so far because of position distance first fan 12, usually radiating efficiency is not good, often need add a three fan 29 again in power-supply unit 13 front ends, by being blown into cold air outward, to guarantee the integral heat sink effect.
After light engine 2 is introduced inside with the light source of projecting lamp 11, it transmits the operation situation of situation and light engine 2 inner relative configurations, being that excuse me earlier learns a light filter 22 of inside, engine 2 shells, 201 rear end with ultraviolet ray in projecting lamp 11 light and infrared ray filtering, only allow white light pass through, the continuous integral mirror 23 that is provided with through a pair of interval is with the white light homogenising, change through a polar biased photoconverter 24 (P/S converter) again, make white light borrow a mirror 25 reflections and elder generation after every two spectroscopes of establishing 261,262 isolate first with white light, second, the 3rd coloured light is (as red, green, blue light), enter in the liquid crystal light valve image He Guang district 27 behind default handling procedure and these isolated each coloured light are continuous, three coloured light are delivered to one first liquid crystal light valve 271 respectively, one second liquid crystal light valve 272, one the 3rd liquid crystal light valve 273, by these liquid crystal light valves 271,272,273 respectively with first, second, after the 3rd coloured light modulation process, light-combining prism 274 by the bright dipping side is synthesized, and projects via the above-mentioned projection lens 20 of being located at front end at last.Above-mentioned first, second, the 3rd liquid crystal light valve 271,272,273 at modulation first, second, the operation of the 3rd coloured light, because high light incident meeting produces high heat, and comparatively To Be Protected from Heat for associated component such as liquid crystal cell and polaroid, easily cause running undesired and to cause color representation bad when temperature rise is too high, inhomogeneous, even cause associated component to be damaged, therefore need collocation that good heat dissipation design is set, the setting of aforementioned second fan 21 is in response to this demand, and be to bring into play radiating effect, this second fan 21 is arranged at the position of light engine 2, just is installed in these liquid crystal light valves 271,272,273 lower zones dispel the heat.
By above-mentioned Fig. 2 as seen, aforementioned light engine in the past 2 inside are in order to separate and to synthesize each optical module of various coloured light in the design, the lower optical module optic axis 291 in one position is arranged, and front end place projection lens 20 has the slightly high projection optics axle 292 in a position, that is to say whole light engine 2, partly compare the projection lens 20 and the rear end of front end is to be arranged at slightly high position, herein, there is aforementioned one low one high deviation state (off-set) in optical module optic axis 291 with front end projection optics axle 292, mainly be for demand in response to projection arrangement " upslide ", the drop shadow effect that this demand institute desire obtains, roughly as shown in Figure 3, allow the projection luminous energy of projection lens 20 be incident upon during use to stand on 293 of the projection screens in its place ahead, and aforementioned optical module optic axis 291 is one low one high Deviation Design with projection optics axle 292, mainly be to make projection lens 20 throw the position of the view field 294 that is obtained, can have major part to be positioned at projection optics axle 292 elevation-over, this is to be convenient to when using in response to general projection arrangement be seated for the audience watch projection screen 293.
Understanding light engine 2 in response to " upslide " demand, after making the central axis of its front end projection lens 20 be higher than the situation of rearward end part, further assess light engine 2 rear ends again and install the situation that is provided with of second fan 21 in the bottom, be not difficult to find the position that is provided with of this second fan 21, thinning degree for whole light engine 2 has negative effect, its reason is: the rear end of light engine 2 is compared to the projection lens 20 of front end, originally just be in lower position, be located at the bottom position place if add this second fan 21, the degree that further causes rear end down to protrude is strengthened, and general fan thickness is quite well, before causing whole light engine 2, total vertical thickness of rear end is more thickeied, thereby cause the negative effect of whole light engine 2 thinning degree, this place for remaining to be improved in the light engine 2 structure designs in the past.
In addition; light engine 2 was blown into cold air from lower to upper by second fan 21 and was derived the design of inner hot gas by the top in the past; it is identical into and out of distinguished and admirable direction; and must reserve ventilating opening at the top; this design has the habit of placing file smoothly because of the user easily; and under the situation of inadvertent, file is placed on the ventilating opening place at light engine 2 tops; cause ventilating opening to be obstructed, to cause the associated components such as each liquid crystal light valve 271,272,273 of light engine 2 inside to damage, or cause inconvenience such as shutdown because of temperature rise is too high.
[summary of the invention]
The object of the present invention is to provide a kind of light engine of liquid crystal projection apparatus, make its more thinning and promote its radiating effect, and when it promotes radiating effect, have more the effect of unlikely obstruction heat dissipation ventilation when placing file above it.
The light engine of liquid crystal projection apparatus of the present invention, it has a shell, be provided with one first liquid crystal light valve, one second liquid crystal light valve, one the 3rd liquid crystal light valve in outer casing back inside, first coloured light, second coloured light, the 3rd coloured light that can synthesize white light respectively in order to modulation, each coloured light is synthesized by a light-combining prism behind modulation, and goes out through the default projection lens projects of shell front end.Each optical module that above-mentioned housing rear end and front end are disposed and this projection lens have the position respectively and are a low height and are configured to an optical module optic axis and a projection optics axle in response to the upslide demand.It is characterized in that: this shell is equiped with one second fan at the place, top of corresponding first, second, third liquid crystal light valve, the suction wind direction of this second fan is with to blow out the wind direction vertical mutually, and will be positioned at the up sucking-off of the heat that high light produced that each liquid crystal light valve passes through because of modulation below it, and send and efficiently radiates heat, and reach the purpose of thinning design via the default blow-off outlet in side.
[description of drawings]
Be elaborated below in conjunction with the light engine of drawings and Examples to liquid crystal projection apparatus of the present invention:
Fig. 1 is that a kind of light engine in the past is configured in the top view organigram in the liquid crystal projection apparatus.
Fig. 2 be among Fig. 1 this in the past light engine be configured in side-looking organigram in the liquid crystal projection apparatus.
Fig. 3 be among Fig. 1 this in the past in the liquid crystal projection apparatus light engine borrow projection optics axle, the optical module optic axis of front and back ends to have offsets in height and produce the use synoptic diagram of upslide effect.
Fig. 4 is the liquid crystal projection apparatus top view organigram of the embodiment of the invention.
Fig. 5 is the side-looking organigram of this embodiment.
Fig. 6 is the top view enlarged drawing of the fair water fin of light engine among this embodiment.
Fig. 7 is the side cutaway view Amplified image of the fair water fin of light engine among this embodiment.
[embodiment]
As Fig. 4 and shown in Figure 5, the liquid crystal projection apparatus of the embodiment of the invention includes a light engine 3, provides the projecting lamp 41 of light source to this light engine 3, first fan 42 that can dispel the heat to this projecting lamp 41, and one can supply the power-supply unit 43 that single unit system operates required power supply.
This projecting lamp 41 can provide light source to aforementioned optics engine 3.
This first fan 42 can dispel the heat to above-mentioned projecting lamp 41, and the hot gas that projecting lamp 41 is produced detaches from front to back.
This power-supply unit 43 is positioned at a space of reserving between projecting lamp 41 the place aheads and light engine 3 sides, this power-supply unit 43 can be supplied the required power supplys of associated component such as light engine 3 in the whole liquid crystal projection apparatus, projecting lamp 41, first fan 42, can by aforementioned first fan 42 when detaching projecting lamp 41 hot gas, detach the hot gas that this power-supply unit 43 is produced in the lump.
This light engine 3, it is earlier same after the inner default light filter 31 in its shell 30 rear ends only allows white light pass through ultraviolet ray in projecting lamp 41 light and infrared ray filtering, a pair of integral mirror 32 is with the white light homogenising, one polar biased photoconverter 33 is changed, renew two spectroscopes 341,342, white light is isolated first, second, the 3rd coloured light is (red, green, blue light), and deliver to one first liquid crystal light valve 351 respectively, one second liquid crystal light valve 352, after one the 3rd liquid crystal light valve 353 is made modulation process, can be synthesized by bright dipping side one light-combining prism (figure does not show) equally, the projection lens 37 via shell 30 front ends projects at last.In addition, shell 30 is equiped with one second fan 38 and a fair water fin 39 respectively in top, bottom corresponding to above-mentioned each liquid crystal light valve 351,352,353 position.
Each optical module and this projection lens 37 that housing 30 rear ends of above-mentioned light engine 3 and front end are partly disposed, have the position equally respectively and be one low one a high optical module optic axis 301 and a projection optics axle 302 that disposes, with demand in response to whole liquid crystal projection apparatus " upslide ", making the shell 30 rear ends bottom of light engine 3 compared to the front end bottom surface that is provided with projection lens 37, is to be in lower position.Relatively, shell 30 rear end end faces are compared to the front end end face that is provided with projection lens 37, also are in lower position and become the depressed area 303 of concavity attitude, and aforementioned second fan 38 is to be installed on this depressed area 303.
And the situation that is provided with of aforementioned second fan 38 and fair water fin 39 is:
This second fan 38 belongs to the suction-type fan design of the fan blower formula of High Pressure Difference, the direction of these second fan, 38 air draughts is to be positioned at its below first liquid crystal light valve 351, second liquid crystal light valve 352, the 3rd liquid crystal light valve 353 and relevant peripheral assembly thereof such as polaroid etc. are because of the up sucking-off of heat due to the high light, and via second fan 38 in the side a default blow-off outlet 381 send, and make this blow-off outlet 381 towards aforesaid power-supply unit 43, therefore the suction wind of this second fan 38 is vertical mutually with the direction that blows out wind, design different from the past sucks, blow out the identical design of wind direction, and the detailed situation that is provided with of studying carefully this second fan in the present embodiment can find that it has following advantage:
1, owing to being installed in the relative front end end face of shell 30 rear end end faces, second fan 38 is on the depressed area 303 of recess, make after the shell 30 rear end end faces of light engine 3 are being installed this second fan 38, second fan, 38 apical side heights of shell 30 rear ends are contour with projection lens 37 end faces at front end place approximately, therefore in the present embodiment this second fan 38 the thickness that situation not only can not increase whole light engine 3 is set, and because of filling a part effective usage space, and can effectively reach the effect of further thinning light engine 3.Compare as can be known, in the light engine structure, second fan was installed in bottom, light engine rear end causes the design that increases integral thickness in the past, the design of the embodiment of the invention specifically improves the shortcoming of design in the past really.
2, this is located at second fan 38 of light engine 3 end faces, because its blow-off outlet 381 is provided in a side of side, the design of being located at end face different from the past, therefore the projection arrangement outer casing top surface need not to set out the air port, therefore when meeting the user is placed on file the projection arrangement end face smoothly during starting shooting situation and taking place, with regard to the design of present embodiment, the also unlikely heat radiation that causes the associated components such as first, second, third liquid crystal light valve 351,352,353 of light engine 3 inside is obstructed and is damaged.
3, by blow-off outlet 381 compartment of terrains of second fan 38 towards power-supply unit 43, therefore not only can strengthen the radiating effect of power-supply unit 43, even can save the three fan that is placed on power-supply unit the place ahead in the aforementioned design in the past.
This fair water fin 39, cooperate Figure 6 and Figure 7, offer on it and correspond respectively to aforementioned first liquid crystal light valve 351, three ventilating openings 391 at second liquid crystal light valve 352 and place, the 3rd liquid crystal light valve 353 belows, each ventilating opening 391 is except that being provided with one at lateral border from lower to upper the wind-guiding face 392 of internally oblique shape, more in the middle of air guide hole 391, be connected with a flow deflector 393, make flow deflector 393 inner edges also have the wind-guiding face 394 of internally oblique shape from lower to upper, make when aforementioned second fan 38 turns round and aspirate wind from lower to upper for during dispelling the heat, cold wind is via set flow deflector 393 and wind-guiding face 392 in the regulation of three ventilating openings 391 of fair water fin 39 and the ventilating opening 391,394 guiding, force the cold wind runner necessary heat dissipation region of flowing through, just flow through first, second, the 3rd liquid crystal light valve 351,352,353 positions and obtain to concentrate the effect of heat radiation make radiating efficiency better.And, therefore also non-imperative is set because the effect that this fair water fin 39 is provided with is the radiating efficiency that is used for promoting 38 pairs first, second, third liquid crystal light valves of above-mentioned second fan 351,352,353.
The enforcement situation of the above-mentioned light engine 3 of the conclusion embodiment of the invention as seen, light engine 3 is disposed at each liquid crystal light valve 351~353 top and adopts the design that above suction blows side by second fan 38, can only effectively not utilize light engine 3 headrooms, and the vertical height of reducing whole light engine 3, and the blow-off outlet 381 of borrowing second fan 38 is blown away towards power-supply unit 43 with the high velocity air that cools off behind each liquid crystal light valve assembly again, and have the effect of power-supply unit 43 heat radiation concurrently, saved the three fan that in the past designs at the power-supply unit front end, and because of second fan 38 is adopted the side-blown mode, need not offer ventilating opening at the top, therefore work as the user file is placed on light engine 3 end faces, unlikely influence is dispelled the heat and is caused inner each liquid crystal light valve associated component to cross cause thermal damage.
Take a broad view of above-mentioned, the present invention can provide a kind of light engine of liquid crystal projection apparatus really, make its more thinning and promote its radiating effect, can save a fan, and when it promotes radiating effect, have more the effect of unlikely obstruction heat dissipation ventilation when placing file above it, so very practical really and progressive.