CN100498512C - Projection type video display apparatus - Google Patents
Projection type video display apparatus Download PDFInfo
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- CN100498512C CN100498512C CNB2005101136372A CN200510113637A CN100498512C CN 100498512 C CN100498512 C CN 100498512C CN B2005101136372 A CNB2005101136372 A CN B2005101136372A CN 200510113637 A CN200510113637 A CN 200510113637A CN 100498512 C CN100498512 C CN 100498512C
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Abstract
The present invention relates to a projection type image display unit having superior cooling performance. A heat conducting part 11 for conducting heat generated by an LED light source 1 to a cooling liquid is provided on the backside of each LED light source 1. Each heat conducting part 11 is connected by piping 12, and the cooling liquid flowing through the piping 12 is serially circulated to each heat conducting part 11. An amount of generated heat of an LED light source 1R is the smallest, and an amount of generated heat of a light source 1G is the largest, and an LED light source 1B is intermediate between them. The cooling liquid cooled via a heat radiation fin 14 is firstly supplied to the heat conducting part 11 for the LED light source 1R, then supplied to the heat conducting part 11B, and finally supplied to the heat conducting part 11G. The cooling liquid discharged from a pump 13 is provided to the heat conducting part 11G. The cooling liquid discharged from the heat conducting part 11G is supplied to the heat radiation fin (radiator) 14 through the piping 12.
Description
Technical field
The present invention relates to projection-type image display devices such as a kind of liquid crystal projection apparatus.
Background technology
Projection-type image display device by being modulated by the light valve (light valve) of liquid crystal panel etc. and the light of projection source institute outgoing, therefore, need possess the light source of high brightness, thereby need the counter-measure of the heat that light source produced of this high brightness.In the past,, cool off light source, and the air that the temperature in will installing has risen is discharged to device outer (with reference to patent documentation 1) by the cooling air that fan produced is blown to light source.
But, in the above-mentioned technology in the past,, therefore, sometimes, can't fully cool off light source gradually along the flow direction (path) of air owing to pass through and discharge between the various opticses of the air-flow of fan in device.Also promptly, cooling power is by about the configuration of optics institute.In addition, the heat that air produced that the temperature in the device has risen remains in the device easily, and above-mentioned heat might cause the permanance of optics or circuit block to reduce.
Patent documentation 1: the spy opens communique 2001-No. 222065
Summary of the invention
The objective of the invention is to, a kind of address the above problem, projection-type image display device with good cooling power is provided.
Projection-type image display device of the present invention in order to address the above problem, is characterized in that, possesses: light source; Be arranged on above-mentioned light source near, give the heat-conduction part of cooling with heat heat conduction that this light source sent with liquid; In above-mentioned heat-conduction part, make above-mentioned cooling liquid round-robin pipe arrangement; The pump that is connected with above-mentioned pipe arrangement; And the radiating part that is connected with above-mentioned pipe arrangement, at least one side of described pipe arrangement and heat-conduction part is covered by heat-barrier material.
By above-mentioned formation, from heat-conduction part, pass through, and walk heat from strip of light, thereby the cooling liquid that temperature has risen is directed in the radiating part and dispels the heat, the chilled cooling liquid by this heat radiation, turn back to once more and arrive heat-conduction part in the pipe arrangement, thereby form loop.With different by the cooling that fan carried out, cooling power is not by about the configuration of the optics in device institute.In addition, by as above allowing cooling like that, can supply with often chilled cooling liquid, thereby can prevent that cooling power from reducing to heat-conduction part with the liquid circulation.
In the projection-type image display device of above-mentioned formation, above-mentioned radiating part can be arranged in the outer side zone that is marked off from above-mentioned configured light sources space.If adopt this formation, the cooling liquid that circulation and temperature have risen in heat-conduction part, be imported in the radiating part that is arranged in the territory, said external lateral areas, in this outer side zone, dispel the heat, therefore, the interior temperature of the cancellation element of can trying one's best rises, thereby can prevent the rising of temperature in the locking apparatus, avoids the permanance of optics to reduce.
More than in the projection-type image display device of Gou Chenging, can possess the wind pushing mechanism of the air-supply that is used for cooling off above-mentioned radiating part.If adopt this formation, just can improve the radiating efficiency of radiating part.In addition, can be in above-mentioned radiating part be arranged on formation in the outer side zone that is marked off from above-mentioned configured light sources space, air in the wind pushing mechanism that possesses the air-supply that is used for cooling off above-mentioned radiating part, above-mentioned wind pushing mechanism suction means, and to above-mentioned outer side zone exhaust.If adopt this formation, can in the exhaust of the warm air in carrying out device, carry out the cooling of above-mentioned radiating part.
More than in the projection-type image display device of Gou Chenging, can allow at least one side of above-mentioned pipe arrangement and heat-conduction part be covered by heat-barrier material.
More than in the projection-type image display device of Gou Chenging, can allow above-mentioned light source constitute by solid-state light emitting element.
Above being formed in is called the liquid cooling basic comprising in this part.
In the above-mentioned liquid cooling basic comprising, can possess a plurality of above-mentioned light sources, simultaneously in each light source heat-conduction part is set, constitute (below, in this part, be called the 1st multiple light courcess formation) with liquid to the cooling that circulates in turn of these a plurality of heat-conduction parts.
During above-mentioned the 1st multiple light courcess constituted, above-mentioned a plurality of light sources can be roughly コ word shape configuration.Perhaps, above-mentioned a plurality of light source is arranged in the same plane.
During above-mentioned the 1st multiple light courcess formation and subordinate thereof constitute, the thermal value difference of above-mentioned a plurality of light sources, can allow and pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, the light source of supplying with the thermal value minimum at first is with heat-conduction part (following be called the 1st in this part constitute).The 1st constitutes, and also can allow pass through the cooling liquid that has been cooled behind the above-mentioned radiating part order less according to the thermal value of above-mentioned light source circulate in each heat-conduction part (following the 2nd formation that is called in this part).
In addition, in above-mentioned the 1st formation, can allow above-mentioned a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, supplied with above-mentioned red light source heat-conduction part at first.In addition, in above-mentioned the 2nd formation, can allow above-mentioned a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the above-mentioned radiating part, next the above-mentioned red light source heat-conduction part of initial supply supplies with above-mentioned blue-light source heat-conduction part, then supplies with above-mentioned green light source heat-conduction part.
The above-mentioned the 1st constitutes and the 2nd constitutes and during subordinate constitutes, can allow last reception cooling with the heat-conduction part of liquid be positioned at above-mentioned radiating part near.
During above-mentioned the 1st multiple light courcess formation and subordinate thereof constitute, above-mentioned a plurality of light source is because of the caused deterioration degree difference of heat, can allow and pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, the light source of supplying with hot caused deterioration degree maximum at first is with heat-conduction part (following be called the 3rd in this part constitute).In addition, the 3rd constitutes, and can allow pass through the cooling liquid that has been cooled behind the above-mentioned radiating part order bigger according to the hot caused deterioration degree of above-mentioned light source circulate in each heat-conduction part (following the 4th formation that is called in this part).
In above-mentioned the 3rd formation, can allow above-mentioned a plurality of light source, constitute by the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the above-mentioned radiating part, supply with above-mentioned red light source heat-conduction part at first.In addition, in above-mentioned the 4th formation, can allow above-mentioned a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the above-mentioned radiating part, next the above-mentioned red light source heat-conduction part of initial supply supplies with above-mentioned green light source heat-conduction part, then supplies with above-mentioned blue-light source heat-conduction part.
The above-mentioned the 3rd constitutes and the 4th constitutes and during subordinate constitutes, can allow last reception cooling with the heat-conduction part of liquid be positioned at above-mentioned radiating part near.Perhaps, the above-mentioned the 3rd constitutes and the 4th constitutes and during subordinate constitutes, can allow initial reception cooling with the heat-conduction part of liquid be positioned at above-mentioned radiating part near.
In the above-mentioned liquid cooling basic comprising, the temperature sensor that can possess the temperature that detects above-mentioned light source, by the detected temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with cooling with the regulation flow and (is comprised from the state of quantity delivered 0 beginning to supply with ormal weight, begin with ormal weight supply both of these case with supply condition from discontented ormal weight with liquid.Down together).
During above-mentioned the 1st formation constitutes with the 2nd, can possess the temperature sensor that detects the one or more temperature in above-mentioned a plurality of light source, by the detected one or more all temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid.
During above-mentioned the 3rd formation constitutes with the 4th, can have the temperature sensor that detects the temperature of the light source of hot caused deterioration degree maximum in above-mentioned a plurality of light source, by the detected temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid.
In the above-mentioned liquid cooling basic comprising, can possess a plurality of light sources, in each light source, heat-conduction part is set simultaneously, cooling liquid circulation side by side in these a plurality of heat-conduction parts (below, in this part, be called the 2nd multiple light courcess and constitute).
During above-mentioned the 2nd multiple light courcess constituted, above-mentioned a plurality of light sources can be roughly コ word shape configuration.Perhaps, during above-mentioned the 2nd multiple light courcess constituted, above-mentioned a plurality of light sources were configured in the same plane.
During above-mentioned the 2nd multiple light courcess formation and subordinate thereof constitute, the thermal value difference of above-mentioned a plurality of light sources, can allow and pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, the light source of supplying with the thermal value maximum is with heat-conduction part (following be called the 5th in this part constitute) at most.The 5th constitutes, and also can allow pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, many more (following the 6th formations that are called in this part) of supplying with for the heat-conduction part of the big more light source of the thermal value of above-mentioned light source.
In above-mentioned the 5th formation, can allow above-mentioned a plurality of light source, constitute by the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the above-mentioned radiating part, supply with above-mentioned green light source heat-conduction part at most.In above-mentioned the 6th formation, can allow above-mentioned a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, having passed through the cooling that has been cooled behind the above-mentioned radiating part with what of the quantity delivered of liquid, is order with heat-conduction part, above-mentioned blue-light source with heat-conduction part, above-mentioned red light source heat-conduction part with above-mentioned green light source.
During above-mentioned the 2nd multiple light courcess formation and subordinate thereof constitute, above-mentioned a plurality of light source is because of the caused deterioration degree difference of heat, can allow and pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, the light source of supplying with hot caused deterioration degree maximum is with heat-conduction part (following be called the 7th in this part constitute) at most.The above-mentioned the 7th constitutes, and can allow pass through the cooling liquid that has been cooled behind the above-mentioned radiating part, gives many more (following the 8th formations that are called in this part) of the big more supply of the hot caused deterioration degree of above-mentioned light source.
In above-mentioned the 7th formation, can allow above-mentioned a plurality of light source, be made of the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the above-mentioned radiating part, it is maximum with heat-conduction part to supply with above-mentioned red light source.In above-mentioned the 8th formation, can allow above-mentioned a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, having passed through the cooling that has been cooled behind the above-mentioned radiating part with what of the quantity delivered of liquid, is order with heat-conduction part, above-mentioned blue-light source with heat-conduction part, above-mentioned green light source heat-conduction part with above-mentioned red light source.
During above-mentioned the 2nd multiple light courcess constitutes, can possess the temperature sensor that detects the one or more temperature in above-mentioned a plurality of light source, by the detected one or more all temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid.
During above-mentioned the 2nd multiple light courcess constitutes, the temperature sensor that can possess the temperature that detects each light source, in that detected temperature is under to the situation more than the fixed temperature respectively to each light source by the said temperature sensor, beginning is supplied with to cool off with the regulation flow and is used liquid.
More than in the projection-type image display device of Gou Chenging, can have the heat heat conduction that parts produced that energising is generated heat and give the parts heat-conduction part of above-mentioned cooling with liquid, above-mentioned pipe arrangement also is connected with heat-conduction part with above-mentioned parts.In addition, more than in the projection-type image display device of Gou Chenging, can have the heat that optics produced that generates heat because of the light that receives the outgoing of above-mentioned light source institute, the used for optical part heat-conduction part of above-mentioned cooling with liquid given in heat conduction, and above-mentioned pipe arrangement also is connected with above-mentioned used for optical part heat-conduction part.
The invention effect
By the present invention, can give play to good cooling power not by about the configuration of optics institute.Like this, the temperature that can reach air in the cancellation element as far as possible rises, and the effect of reduction of the permanance of optics is avoided in the rising of the temperature in the anti-locking apparatus.
Description of drawings
Fig. 1 is the vertical view of the projection-type image display device of expression the 1st embodiment of the present invention.
Fig. 2 is the stereographic map of the projection-type image display device of expression the 1st embodiment of the present invention.
Fig. 3 is the vertical view of the projection-type image display device of expression the 2nd embodiment of the present invention.
Fig. 4 is the vertical view of the projection-type image display device of expression the 3rd embodiment of the present invention.
Fig. 5 is for the figure of expression the 4th embodiment of the present invention, for showing the stereographic map of white illumination device.
Fig. 6 is for the figure of expression the 4th embodiment of the present invention, for showing the stereographic map of white illumination device.
Fig. 7 is the vertical view of the projection-type image display device of expression the 5th embodiment of the present invention.
Fig. 8 is the curve map of the control content in the projection-type image display device of expression the 6th embodiment of the present invention.
Among the figure: 1-led light source; 10-liquid crystal projection apparatus; 11-heat-conduction part; 12-pipe arrangement; 13-pump; 14-heat radiator (heating radiator); 15-Air Blast fan; 16-arm; 17-flow control valve.
Embodiment
(embodiment 1)
Contrast Fig. 1 and Fig. 2 below describes the projection-type image display device of embodiments of the present invention.
Fig. 1 is the vertical view of expression one-board projection-type image display device 10, and Fig. 2 is its stereographic map.Projection-type image display device 10 has led light source 1R, 1G, these 3 light sources of 1B (following when really not referring to each led light source, as to use symbol " 1 ").Each led light source 1 has the structure that LED (light emitting diode) is configured to array-like.Led light source 1R outgoing red light, led light source 1G outgoing green light, led light source 1B outgoing blue light.
Led light source 1B is arranged on the opposite of the light entrance face of lens 3 by cross dichronic mirror 2 clampings, led light source 1R and led light source 1G clamping cross dichronic mirror 2, and mutually in the face of being provided with.Also promptly, 3 led light sources 1 are configured to roughly コ word shape.
From the light of 1 outgoing of each led light source, imported to the light entrance face of lens 3 by cross dichronic mirror 2.Cross dichronic mirror 2 forms the 1st cross dichronic mirror 2a of portion and the 2nd cross dichronic mirror 2b of the portion configuration that intersects.The 1st cross dichronic mirror 2a of portion reflection red light allows light transmission beyond the red light.The 2nd cross dichronic mirror 2b of portion reflects green allows light transmission beyond the green light.
The light exit side of each led light source 1 is provided with the emergent light integration is imported the 1st fly's-eye lens 4a to display panels 5.In addition, the 2nd fly's-eye lens 4b is arranged on the light exit side (light incident sides of lens 3) of cross dichronic mirror 2.By each the 1st fly's-eye lens 4a and the 2nd fly's-eye lens 4b, constitute each light source integration lens.Also promptly, each lens of above-mentioned fly's- eye lens 4a, 4b are right, with the photoconduction of 1 outgoing of led light source to display panels 5 comprehensively.
The modulated light (color video light) by transflective liquid crystal panel 5, amplify by projection lens 6 projection, Projection Display is on not shown screen.
The rear side of each led light source 1 is provided with the hot heat conduction that led light source 1 is produced and gives the heat-conduction part 11 of cooling with liquid.In addition, the heat-conduction part that below will be used for led light source 1R is labeled as heat-conduction part 11R, and the heat-conduction part that will be used for led light source 1B is labeled as heat-conduction part 11B, and the heat-conduction part that will be used for led light source 1G is labeled as heat-conduction part 11G.Each heat-conduction part 11 is connected by pipe arrangement 12.The cooling of being flowed in this pipe arrangement 12 circulates in each heat-conduction part 11 in turn with liquid.Pipe arrangement 12 and each heat-conduction part 11 can cover by heat-barrier material.
In the present embodiment, the thermal value of led light source 1R is minimum, and the thermal value of led light source 1G is maximum, and the thermal value of led light source 1B is between it.In the present embodiment, passed through heat radiator (heating radiator) 14 and the cooling liquid that has been cooled, at first supplied with led light source 1R heat-conduction part 11R, next supplied with heat-conduction part 11B, supplied with heat-conduction part 11G at last as heat exchange department.Be used for supplying with the pipe arrangement 12 of cooling to heat-conduction part 11R, pass through from the light exit side of cross dichronic mirror 2 with liquid from heat radiator 14.In order to allow this pipe arrangement 12 not hinder passing through of light, and be configured in the bottom surface.Be used for circulating above-mentioned cooling with the pump 13 of liquid, be arranged between heat-conduction part 11B and the heat-conduction part 11G.The cooling that is sprayed from pump 13 offers heat-conduction part 11G with liquid.Afterwards, from the cooling liquid that heat-conduction part 11G is discharged,, supply with heat radiator 14 by pipe arrangement 12.In addition, the allocation position of pump 13 is not limited between heat-conduction part 11B and the heat-conduction part 11G, can be on any position on the pipe arrangement.
Be provided with Air Blast fan 15 in the device.This Air Blast fan 15, the air in the suction means and to above-mentioned outer side zone exhaust.By the air of this exhaust, take away heat from heat radiator 14 interior coolings with liquid effectively, this heat is discharged to outside the device.
As mentioned above, by heat-conduction part 11, and taken away the heat of led light source 1, thereby the cooling liquid that temperature has risen is directed in the heat radiator 14 and heat radiation, by this heat radiation chilled cooling liquid, get back to once more in the pipe arrangement 12, arrive heat-conduction part 11, thereby form loop.With different by the air cooling that fan carried out, cooling power is not by about the configuration of the optics in device institute.In addition, by as above allowing cooling like that, supply with often chilled cooling liquid can for heat-conduction part 11, thereby can prevent that cooling power from reducing with the liquid circulation.
In addition, in the present embodiment, the cooling liquid that circulation and temperature have risen in heat-conduction part 11, be imported in the heat radiator 14 that is arranged in the territory, said external lateral areas, dispel the heat in this outer side zone, therefore, the air themperature in the cancellation element of can trying one's best rises, the reduction of the permanance of optics is avoided in the rising of the temperature in the anti-locking apparatus.In addition, the zone of said external side is not limited in and is positioned at the device outer situation isolated fully with device, also comprise being positioned at device, but in space isolation in the device relatively to a certain degree, and with the zone of external communications.For example, in device, have gas exhaust duct, in this gas exhaust duct, be provided with the formation of heat radiator 14, also be equivalent to heat radiator 14 is arranged in the territory, said external lateral areas.
In addition, in the present embodiment, the thermal value difference of a plurality of led light sources 1, the cooling liquid that has been cooled through above-mentioned heat radiator 14, from less led light source 1 usefulness heat-conduction part, the 11 beginnings circulation in turn of thermal value, therefore, can shorten the length of the cooling of the condition of high temperature with the stream of liquid, the temperature that helps in the anti-locking apparatus rises.In addition, in the present embodiment, last territory, said external lateral areas is positioned at and receives cooling with near the heat-conduction part 11G of liquid, and therefore, the cooling that can realize the highest temperature is with the stream of liquid the shortizationest, and the temperature that helps more in the anti-locking apparatus rises.
In addition, in the present embodiment, above-mentioned Air Blast fan 15 in install to the territory exhaust of said external lateral areas, therefore have can compatible device in the advantage of cooling of the exhaust of air and heat radiator 14.Certainly, do not get rid of the air outside suction means, to the formation of heat radiator 14 air-supplies.
In addition, pipe arrangement 12 can also utilize the space of cross dichronic mirror 2 tops etc. to be provided with, and only otherwise can cover light path, no matter which configuration can.In addition, in the above-mentioned embodiment, light source is made of solid-state light emitting element, but the present invention is not limited to this.The configuration sequence of the led light source 1 of each coloured light of outgoing and cooling also are not limited in above-mentioned formation with the circular order of liquid.In addition, though more than for possessing the formation of a plurality of light sources, in the formation that possesses single light source (for example light source that White LED constituted), also can adopt liquid cooling structure of the present invention.In addition, though represented to possess the formation of single display panels, also can adopt 3 board-like formations (for example formation of configuration display panels between each led light source 1 and cross dichronic mirror 2).In addition, be not limited in the transmission-type liquid crystal display panel, can also adopt the reflective liquid crystal display panel, perhaps, can also adopt the vedio display board that forms by the configuration of a plurality of micro mirrors etc.All identical in the following embodiment.
(embodiment 2)
Based on Fig. 3 the 2nd embodiment of the present invention is described.In addition, give the parts mark identical symbol identical, omit its explanation with the parts shown in Fig. 1.Cross dichronic mirror 2 ' the 1st cross dichronic mirror 2a of portion and the 2nd cross dichronic mirror 2c of the portion configuration that intersects is formed.Light beyond the 1st cross dichronic mirror 2a of the portion reflection red light, transmits red.Light beyond the 2nd cross dichronic mirror 2c of the portion reflect blue light, transmits blue.In the present embodiment, the degree difference of the hot caused deterioration in a plurality of led light sources 1 deterioration of display performance (the caused colourity variation of the variation of brightness reduction, wavelength shift, half breadth etc.), the hot deterioration degree maximum of the led light source 1R of emission red light.Cooling liquid flows towards the direction opposite with Fig. 1.In addition, heat radiator 14 near be provided with led light source 1R and heat-conduction part 11R.Through the cooling liquid that has been cooled behind the heat radiator 14, at first supply with led light source 1R heat-conduction part 11R.Also promptly, give the cooling liquid of the led light source 1R supply lowest temperature state of hot deterioration degree maximum, the temperature that suppresses led light source 1R rises, and prevents to worsen.In addition, in the present embodiment, passed through led light source 1R, supplied with heat-conduction part 11G, supplied with heat-conduction part 11B at last with the cooling liquid after the heat-conduction part 11R.Cooling liquid can circulate in each heat-conduction part according to the big order of the hot caused deterioration degree of light source.
In the above-mentioned embodiment 1,, also at first supply with led light source 1R heat-conduction part 11R through the cooling liquid that has been cooled behind the heat radiator 14.Therefore, in the embodiment 1, also give the cooling liquid of the led light source 1R supply lowest temperature state of hot deterioration degree maximum, the temperature that suppresses led light source 1R rises, and prevents to worsen.But, in the formation of embodiment 2, led light source 1R be configured in heat radiator 14 near.Therefore, can be shorter from heat radiator 14 to led light source 1R with the length of the pipe arrangement 12 the heat-conduction part 11R, use the temperature of liquid to rise thereby can suppress to cool off as far as possible with liquid cooling before supplying with heat-conduction part 11R.
(embodiment 3)
Contrast Fig. 4 describes the 3rd embodiment of the present invention.In addition, give the parts mark identical symbol identical, omit its explanation with the parts shown in Fig. 1.In the formation of Fig. 1, passed through the cooling liquid of led light source 1G, be imported into to heat radiator 14 with heat-conduction part 11G.Relative therewith, in the formation shown in Fig. 4, passed through the cooling liquid of led light source 1G with heat-conduction part 11G,, be imported into again with after the heat-conduction part 22 via power supply to heat radiator 14.Power supply is with heat-conduction part 22, the heat that power supply 21 produced that is used for taking away in the circuit part 20 and is disposed and being set up.If adopt above-mentioned formation, just the heat that power supply 21 is produced also can be discharged to outside the device, the temperature in the restraining device rises.In addition, can also adopt the optics that receives light and heating from light source 1 (for example display panels 5 etc.) heat-conduction part (not shown) also is set, supply with the formation of cooling with liquid to this heat-conduction part.Set heat-conduction part in the above-mentioned optics in order not cover light path, for example can adopt the structure with shaped as frame shape.
(embodiment 4)
Contrast Fig. 5 and Fig. 6 describe the 4th embodiment of the present invention.
Fig. 5 is the stereographic map of employed white illumination device 110 in the expression projection-type image display device.Projection-type image display device in this case, employing is separated into each coloured light by dichronic mirror etc. with white light, import to give each coloured light vedio display board, synthetic video light of all kinds and the formation of throwing perhaps adopt white light is imported formation to a slice color video display panel.Above-mentioned white illumination device 110 is configured in a plurality of light sources in the same plane and constitutes.Specifically, in the thermal transfer plate 101, the led light source 100R of outgoing red light with the led light source 100G100G of outgoing green light and the led light source 100B of outgoing blue light, is arranged in quadrilateral.Each led light source 100 both can be made of a LED, can be made of a plurality of LED again.
In the thermal transfer plate 101, be formed with the inlet portion 101a and the stream portion 101b and the export department 101c that omit コ word shape of cooling with liquid.Upstream side at the above-mentioned stream 101b of portion at first is provided with led light source 100R, and its downstream side is provided with led light source 100G100G.Thermal transfer plate 101 can be regarded integrated formation of a plurality of heat-conduction parts by each light source is used as.
The degree difference of the hot caused deterioration in each led light source 100, in the present embodiment, the hot deterioration degree maximum of the led light source 100R of emission red light.Pass through the cooling liquid that has been cooled after the not shown radiator fan 14, at first passed through the downside of led light source 100R.Also promptly, give the cooling liquid of the led light source 100R supply lowest temperature state of hot deterioration degree maximum, the temperature that suppresses led light source 100R rises, and prevents hot caused deterioration.In addition, in the present embodiment, passed through the cooling liquid after the downside of led light source 100R, passed through, passed through the downside of led light source 100B at last from the downside of led light source 100G100G.Liquid is used in cooling, can circulate in each heat-conduction part according to the big order of the hot caused deterioration degree of light source.
Fig. 6 is the stereographic map of employed white illumination device 11 in the expression projection-type image display device.This white illumination device 111 also constitutes by a plurality of light sources are configured in the same plane.Led light source 100R heat-conduction part 102R with led light source 100G heat-conduction part 102G102G and led light source 100B heat-conduction part 102B, is configured to quadrilateral, the top led light source 100 that disposes respectively of each heat-conduction part.
Above-mentioned heat-conduction part 102 is connected to each other by pipe arrangement, and the cooling liquid that has passed through not shown heat radiator 14 and be cooled passes through in heat-conduction part 102R, next passes through from heat-conduction part 102G102G, then passes through in heat-conduction part 102B.
The degree difference of the hot caused deterioration in each led light source 100, in the present embodiment, the hot deterioration degree maximum of the led light source 100R of emission red light.Above-mentioned cooling liquid at first passes through in heat-conduction part 102R.Also promptly, give the cooling liquid of the led light source 100R supply lowest temperature state of hot deterioration degree maximum, the temperature that suppresses led light source 100R rises, and prevents the deterioration of heat.In addition, in the present embodiment, passed through heat-conduction part 102R cooling liquid afterwards, in heat-conduction part 102G102G, passed through, in heat-conduction part 102B, passed through at last.Liquid is used in cooling, can circulate in each heat-conduction part according to the big order of the hot caused deterioration degree of light source.
In addition, in the formation shown in Fig. 5 and Fig. 6, the thermal value difference of a plurality of light sources has been passed through the cooling liquid that has been cooled after the above-mentioned heat radiator, also can at first supply with the minimum light source heat-conduction part of thermal value.In addition, passed through the cooling liquid that has been cooled after the above-mentioned heat radiator, can be according to the thermal value of above-mentioned light source few order circulates in each heat-conduction part.
(embodiment 5)
Contrast Fig. 7 describes the 5th embodiment of the present invention.In addition, give the parts mark identical symbol identical, omit its explanation with the parts shown in Fig. 1.In the formation of Fig. 1, cooling imports to 3 heat-conduction parts 11 in turn with liquid.Relative therewith, in the formation shown in Fig. 7, cooling imports side by side with liquid and gives 3 heat-conduction parts 11.
The cooling liquid that pump 13 is sprayed at first imports and gives arm (branch) 16, by each pipe arrangement 12 that is connected with this arm 16, imports side by side and gives each heat-conduction part 11.Be provided with flow control valve 17 in above-mentioned each pipe arrangement 12.By operating each flow control valve 17, can regulate the flow of using liquid towards the cooling of each heat-conduction part 11.
The thermal value of led light source 1R, 1G, 1B is different.Can allow and pass through the cooling liquid that has been cooled after the heat radiator 14, the light source of supplying with the thermal value maximum with heat-conduction part 11 (for example heat-conduction part 11G) at most.Also promptly, above-mentioned each flow control valve 17 can be set like this.In addition, can allow and pass through the cooling liquid that has been cooled after the heat radiator 14, also many more (for example according to heat-conduction part 11G, heat-conduction part 11B, heat-conduction part 11R order) supplied with heat-conduction part 11 to the big light source of thermal value.
The degree of the hot caused deterioration of led light source 1R, 1G, 1B is different.Can allow and pass through the cooling liquid that has been cooled after the heat radiator 14, the light source of supplying with hot deterioration degree maximum with heat-conduction part 11 (for example heat-conduction part 11G) at most.Also promptly, above-mentioned each flow control valve 17 can be set like this.In addition, can allow and pass through the cooling liquid that has been cooled after the heat radiator 14, also many more (for example according to heat-conduction part 11R, heat-conduction part 11B, heat-conduction part 11G order) supplied with heat-conduction part 11 to the light source of hot deterioration degree maximum.
Lead to the flow regulation of the cooling of each heat-conduction part 11, also can be undertaken by thickness (diameter) difference of conveying the pipe arrangement that each heat-conduction part 11 is connected with liquid.In addition, in this case, flow is fixed.In addition, in the formation (with reference to Fig. 5 and Fig. 6) that a plurality of led light sources is arranged in the same plane, can adopt formation, and then can allow towards the flow difference of the liquid of each heat-conduction part with each heat-conduction part parallel connection.
Lead to the flow regulation of the cooling of each heat-conduction part 11, can consider to carry out after the following item with liquid.For example, the target holding temperature with led light source 1R is made as 35 ℃.It is 25 ℃ that imagination is usually used the temperature in the place of this projection-type image display device, according to the thermal value of unit interval of led light source 1R and the pyroconductivity of heat-conduction part 11R etc., obtains the flow (regulation flow) that should supply with heat-conduction part 11R.Obtain the regulation flow that leads to heat-conduction part 11G, the regulation flow that leads to heat-conduction part 11B equally, respectively.The regulation flow of being obtained like this is different.Regulate above-mentioned each flow control valve 17 according to this difference.Certainly, also can allow the target holding temperature difference of each led light source.If the hot deterioration degree of led light source 1R is bigger, for example can will add that value behind a is as the regulation flow for the regulation flow as above obtained.Perhaps, if begin the heat deterioration afterwards, just this target holding temperature is made as 30 ℃ design to led light source 1R just can also adopt led light source 1R to surpass 30 ℃.Also promptly, can the hot deterioration degree of each led light source 1 is bigger, the target holding temperature of regarding each led light source 1 as is lower.
In addition, temperature in the device that detects in the projection-type image display device can also be set, near or the temperature the led light source, or turn back to the temperature of the refrigerant in the heat radiator 14, or the temperature sensor of the temperature of the refrigerant that flows out from heat radiator 14, according to temperature shown in this temperature sensor, carry out the spray volume control of said pump 13.This spray volume control also goes for the embodiment 1～4 (types of a plurality of heat-conduction part 11 series connection) of above-mentioned tandem type.
(embodiment 6)
According to Fig. 8 the 6th embodiment of the present invention is described.Fig. 8 is the curve map that passes through the time relation between (branch) and the temperature variation behind the power connection of representing in the projection-type image display device.The said temperature variation is made as 100 with target holding temperature (can access the temperature province of the stable characteristics of luminescence in the light source), recently represents present temperature by percentage.
Comparative example among Fig. 8 has shown in the power connection of projection-type image display device, allows the temperature variation of the led light source 1 under the situation that pump 13 often works.Can learn that from this comparative example if when connecting the power supply of projection-type image display device, allow pump 13 operate as normal, then the temperature of led light source 1 needs the long time, the picture element instability of projects images before reaching the target holding temperature.
In the 6th embodiment, have the temperature sensor of the temperature that detects led light source, and the control part (microcomputer) that comes control pump 13 according to the output of this temperature sensor.Like this, under the situation of the detected temperature of said temperature sensor for (for example above-mentioned target holding temperature or the temperature lower slightly than target holding temperature) more than to fixed temperature, beginning is supplied with cooling liquid (pump 13 operate as normal) with the flow of regulation.For example, establishing present temperature is 25 ℃, and the temperature of the led light source of projection-type image display device also is 25 ℃, and above-mentioned is 35 ℃ to fixed temperature.Under such condition, even with the power connection of projection-type image display device, cooling does not begin with the regulation flow supply of liquid yet.Also promptly, cooling is 0 or less than regulation flow (pump 13 low-power operation) with the quantity delivered of liquid.Among the embodiment of Fig. 8, cooling is made as 0 (pump 13 is in closed condition) with the quantity delivered of liquid.The curve map of embodiment from this Fig. 8 can be learnt, after the power connection of projection-type image display device, the temperature of led light source 1 reaches at once to fixed temperature (35 ℃), begins to cool down with the regulation flow of liquid and supplies with (pump 13 is connected), and the temperature of keeping led light source 1 is a target temperature.In addition, after disconnecting, the power supply of projection-type image display device once more during energized,, therefore almost gets started the supply (pump 13 connections) of cooling with the regulation flow of liquid because the temperature of led light source 1 is almost given temperature (35 ℃).
Such control if having the formation of a light source, then also can detect the temperature of this light source.If have the formation of a plurality of light sources, can possess the temperature sensor that detects the one or more temperature in a plurality of light sources, by the detected one or more all temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid.Perhaps, the temperature sensor that can have the temperature of the light source that detects the hot deterioration degree maximum in above-mentioned a plurality of light source, by the detected temperature of said temperature sensor under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid.
The above-mentioned type in parallel (type of a plurality of heat-conduction part 11 parallel connections; With reference to embodiment 5) in, each led light source is carried out the control shown in the above-mentioned embodiment 6 respectively.For example, the target holding temperature of establishing led light source 1R is 30 ℃, and the target holding temperature of led light source 1G is 32 ℃, and the target holding temperature of led light source 1B is 34 ℃.In order to detect 3 led light sources 1 temperature separately, be provided with 3 temperature sensors.In addition, the valve (using the valve of o etc.) that comes conduction and cut-off by electrical control can be set, replace the flow control valve 17 shown in Fig. 7.The control part (microcomputer) that does not show among the figure is transfused to the temperature information from each temperature sensor.Under the state that the power supply of projection-type image display device disconnects, if present temperature is 25 ℃, then the temperature information of each temperature sensor also demonstrates 25 ℃.Under this state, above-mentioned control part carries out the control with all valve closings (pass).In the power connection of projection-type image display device, carry out energising to each led light source 1, the temperature of each led light source 1 rises.Reach moment (reach the moment of target holding temperature or reach the moment that is lower than the target holding temperature slightly) to fixed temperature respectively at each led light source 1, connect each valve (opening), each led light source 1 begins to cool down.
In addition, pump 13 can also be controlled its spray volume interimly.For example, during valve open in above-mentioned 3 valves, by the control of powering of above-mentioned control part, make it have the 1st spray volume, when two valve opens, by the control of powering of above-mentioned control part, make it have the 2nd spray volume, when 3 valve opens,, make it have the 3rd spray volume by the control of powering of above-mentioned control part.In addition, flow control valve 17 for example by the situation that motorized valve constituted that has motor under, also can use such flow control valve 17.Like this, under the situation of using such flow control valve 17, under state, can carry out supplying with less than the cooling liquid of regulation flow less than the target holding temperature.
Claims (37)
1. projection-type image display device is characterized in that possessing:
Light source; Be arranged on described light source near, give the heat-conduction part of cooling with heat heat conduction that this light source sent with liquid; In described heat-conduction part, make described cooling liquid round-robin pipe arrangement; The pump that is connected with described pipe arrangement; And the radiating part that is connected with described pipe arrangement,
At least one side of described pipe arrangement and heat-conduction part is covered by heat-barrier material.
2. projection-type image display device as claimed in claim 1 is characterized in that:
Described radiating part is arranged in the outer side zone that is marked off from described configured light sources space.
3. projection-type image display device as claimed in claim 1 or 2 is characterized in that:
The wind pushing mechanism that possesses the air-supply that is used for cooling off described radiating part.
4. projection-type image display device as claimed in claim 2 is characterized in that:
Air in the wind pushing mechanism that possesses the air-supply that is used for cooling off described radiating part, described wind pushing mechanism suction means, and to described outer side zone exhaust.
5. projection-type image display device as claimed in claim 1 is characterized in that:
Described light source is made of solid-state light emitting element.
6. projection-type image display device as claimed in claim 1 is characterized in that:
Possess a plurality of described light sources, and in each light source heat-conduction part is set, circulating in turn to cool off to these a plurality of heat-conduction parts constitutes with liquid.
7. projection-type image display device as claimed in claim 6 is characterized in that:
Described a plurality of light source is roughly コ word shape configuration.
8. projection-type image display device as claimed in claim 6 is characterized in that:
Described a plurality of light source is configured in the same plane.
9. projection-type image display device as claimed in claim 7 is characterized in that:
The thermal value difference of described a plurality of light sources has been passed through the cooling liquid that has been cooled behind the described radiating part, supplies with the light source heat-conduction part of thermal value minimum at first.
10. projection-type image display device as claimed in claim 9 is characterized in that:
Passed through the cooling liquid that has been cooled behind the described radiating part, the order less according to the thermal value of described light source circulates in each heat-conduction part.
11. projection-type image display device as claimed in claim 9 is characterized in that:
Described a plurality of light source is made of the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, has passed through the cooling liquid that has been cooled behind the described radiating part, supplies with described red light source heat-conduction part at first.
12. projection-type image display device as claimed in claim 10 is characterized in that:
Described a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the described radiating part, the described red light source heat-conduction part of initial supply, next supply with described blue-light source heat-conduction part, then supply with described green light source heat-conduction part.
13. projection-type image display device as claimed in claim 10 is characterized in that:
Receive at last cooling with the heat-conduction part of liquid be positioned at described radiating part near.
14. projection-type image display device as claimed in claim 7 is characterized in that:
Described a plurality of light source is because of the caused deterioration degree difference of heat, passed through the cooling liquid that has been cooled behind the described radiating part, supplies with the light source heat-conduction part of hot caused deterioration degree maximum at first.
15. projection-type image display device as claimed in claim 14 is characterized in that:
Passed through the cooling liquid that has been cooled behind the described radiating part, the order big according to the hot caused deterioration degree of described light source circulates in each heat-conduction part.
16. projection-type image display device as claimed in claim 14 is characterized in that:
Described a plurality of light source is made of the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, has passed through the cooling liquid that has been cooled behind the described radiating part, supplies with described red light source heat-conduction part at first.
17. projection-type image display device as claimed in claim 15 is characterized in that:
Described a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, passed through the cooling liquid that has been cooled behind the described radiating part, the described red light source heat-conduction part of initial supply, next supply with described green light source heat-conduction part, then supply with described blue-light source heat-conduction part.
18., it is characterized in that as each described projection-type image display device in the claim 15～17:
Receive at last cooling with the heat-conduction part of liquid be positioned at described radiating part near.
19., it is characterized in that as each described projection-type image display device in the claim 15～17:
Initial receive cooling with the heat-conduction part of liquid be positioned at described radiating part near.
20. projection-type image display device as claimed in claim 1 is characterized in that:
The temperature sensor that possesses the temperature that detects described light source, under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid in the temperature detected by described temperature sensor.
21. projection-type image display device as claimed in claim 7 is characterized in that:
The temperature sensor that possesses the temperature that detects the one or more light sources in described a plurality of light source, for under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid in one or more all temperature detected by described temperature sensor.
22. projection-type image display device as claimed in claim 15 is characterized in that:
Possess the temperature sensor that detects the temperature of the light source of hot caused deterioration degree maximum in described a plurality of light source, under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid in the temperature detected by described temperature sensor.
23. projection-type image display device as claimed in claim 1 is characterized in that:
Possess a plurality of described light sources, in each light source heat-conduction part is set simultaneously, cooling circulates in these a plurality of heat-conduction parts side by side with liquid.
24. projection-type image display device as claimed in claim 23 is characterized in that:
Described a plurality of light source is roughly コ word shape configuration.
25. projection-type image display device as claimed in claim 23 is characterized in that:
Described a plurality of light source is configured in the same plane.
26. projection-type image display device as claimed in claim 24 is characterized in that:
The thermal value difference of described a plurality of light sources has been passed through the cooling liquid that has been cooled behind the described radiating part, and the light source of supplying with the thermal value maximum is maximum with heat-conduction part.
27. projection-type image display device as claimed in claim 26 is characterized in that:
Pass through the cooling liquid that has been cooled behind the described radiating part, given many more that the heat-conduction part of the big more light source of the thermal value of described light source supplies with.
28. projection-type image display device as claimed in claim 26 is characterized in that:
Described a plurality of light source is made of the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, has passed through the cooling liquid that has been cooled behind the described radiating part, and it is maximum with heat-conduction part to supply with described green light source.
29. projection-type image display device as claimed in claim 27 is characterized in that:
Described a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, having passed through the cooling that has been cooled behind the described radiating part with what of the quantity delivered of liquid, is order with heat-conduction part, described blue-light source with heat-conduction part, described red light source heat-conduction part with described green light source.
30. projection-type image display device as claimed in claim 24 is characterized in that:
Described a plurality of light source is because of the caused deterioration degree difference of heat, passed through the cooling liquid that has been cooled behind the described radiating part, and the light source of supplying with hot caused deterioration degree maximum is maximum with heat-conduction part.
31. projection-type image display device as claimed in claim 30 is characterized in that:
Pass through the cooling liquid that has been cooled behind the described radiating part, given the many more of the big more supply of the hot caused deterioration degree of described light source.
32. projection-type image display device as claimed in claim 30 is characterized in that:
Described a plurality of light source is made of the green light source of red light source, the transmitting green light of emission red light and the blue-light source of emission blue light, has passed through the cooling liquid that has been cooled behind the described radiating part, and it is maximum with heat-conduction part to supply with described red light source.
33. projection-type image display device as claimed in claim 31 is characterized in that:
Described a plurality of light source, constitute by the red light source of emission red light, the green light source of transmitting green light and the blue-light source of emission blue light, having passed through the cooling that has been cooled behind the described radiating part with what of the quantity delivered of liquid, is order with heat-conduction part, described blue-light source with heat-conduction part, described green light source heat-conduction part with described red light source.
34. projection-type image display device as claimed in claim 24 is characterized in that:
Possess the temperature sensor that detects the one or more temperature in described a plurality of light source, under to the situation more than the fixed temperature, beginning is supplied with to cool off with the regulation flow and is used liquid in one or more all temperature detected by described temperature sensor.
35. projection-type image display device as claimed in claim 24 is characterized in that:
The temperature sensor that possesses the temperature that detects each light source, in that detected temperature is under to the situation more than the fixed temperature respectively to each light source by described temperature sensor, beginning is supplied with to cool off with the regulation flow and is used liquid.
36. projection-type image display device as claimed in claim 1 is characterized in that:
Have and give the parts heat-conduction part of described cooling with liquid with other the heat heat conduction that parts produced of generating heat by energising except that light source, described pipe arrangement also is connected with heat-conduction part with described parts.
37. projection-type image display device as claimed in claim 1 is characterized in that:
Have the heat that optics produced that will generate heat because of the light that receives the outgoing of described light source institute, the used for optical part heat-conduction part of described cooling with liquid given in heat conduction, and described pipe arrangement also is connected with described used for optical part heat-conduction part.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
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| JP2004300878 | 2004-10-15 | ||
| JP2004300878 | 2004-10-15 | ||
| JP2005178651 | 2005-06-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2005101136372A Active CN100498512C (en) | 2004-10-15 | 2005-10-14 | Projection type video display apparatus |
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