CN1497335A - Lamp with reflector and image projecting device - Google Patents
Lamp with reflector and image projecting device Download PDFInfo
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- CN1497335A CN1497335A CNA2003101017213A CN200310101721A CN1497335A CN 1497335 A CN1497335 A CN 1497335A CN A2003101017213 A CNA2003101017213 A CN A2003101017213A CN 200310101721 A CN200310101721 A CN 200310101721A CN 1497335 A CN1497335 A CN 1497335A
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Abstract
A reflecting-mirror-equipped lamp 2000 is constituted by a high pressure discharge lamp 150 and a reflecting mirror 300. The reflecting mirror 300 includes a wide opening 310 and a narrow opening 320. A first sealing portion 101a of the high pressure discharge lamp 150 is fixed near the narrow portion 320 of the reflecting mirror 300, and provided with no base. A second sealing portion 101b of the high pressure discharge lamp 150 is provided at a side of the wide opening 310 of the reflecting mirror 300. An external lead 104 of the first sealing portion 101a and an outward-drawn lead wire 204a are joined to each other by the plastic flow of a caulking member 10.
Description
Technical field
The present invention relates to have the lamp and the image projection device of catoptron.In particular, the present invention relates to as liquid crystal projection apparatus with the lamp that has catoptron such as the image projector of light source or digital micromirror device (Digital Micromirror Device:DMD) projector etc. with light source.
Background technology
As the device with the image that amplifies mode Projection Display literal, figure etc., people know the image display device that liquid crystal projection apparatus etc. is arranged.Because the light that such image display device (or image projection device) necessarily requires to stipulate is exported, and is widely used as light source so generally will have the lamp that has catoptron of high brightness high-pressure discharge lamp (HID lamp).In addition, follow popularizing of projector, people can require the projector bright more, that overall dimensions is littler.
Fig. 8 represents the cross section composition of the lamp that has catoptron 1000 that existing projector is used in a schematic way.The lamp that has catoptron 1000 shown in Figure 8 is made of high-pressure discharge lamp 1150 and the catoptron 1300 that is provided with front glass 1330.High-pressure discharge lamp 1150 is such as the high-pressure mercury-vapor lamp according to alternate current operation, and it comprises luminotron 1100 and a pair of sealing 1101 that extends from the two ends of luminotron 1100.In the inside of luminotron 1100, be sealed with luminescent substance (mercury) 1105, in luminotron 1100, relatively be provided with pair of electrodes 1102.Electrode 1102 is connected with the molybdenum foil 1103 of the inside that is positioned at sealing 1101, and exterior guiding line 1104 is connected with molybdenum foil 1103.This lamp 1150 that has catoptron 1300 is received in the inside of lamp outer cover 1400, by these parts, constitutes lamp unit 1000.
Light fitting 1200 is installed on one of them sealing 1101 of lamp 1150, and light fitting 1200 is inserted in the neck 1306 of catoptron 1300, is fixed in herein by bonding agent etc.Because light fitting 1200 is electrically connected with the exterior guiding line 1104 that extends from the end of sealing 1101, so the end of light fitting 1200 constitutes a terminal LA in the high-pressure discharge lamp 1150.In addition, the exterior guiding line 1104 that extends from the sealing 1101 of the wide peristome side that is arranged in catoptron 1300 also constitutes another terminal LB of high-pressure discharge lamp 1150.On terminal LA and terminal LB, connect the outside by welding manner respectively and draw lead (cable) 1204a and 1204b.The outside is drawn lead 1204a and is connected with the pin (pin) 1250 of the terminal of formation lamp unit 1500 with 1204b.
Fig. 9 (a) is for representing the stereographic map of lamp unit 1500 shown in Figure 8, the stereographic map that Fig. 9 (b) schematically illustrates for projector main body 1600 partly cut-away's summarys that will be provided with lamp unit 1500 in a schematic way.In addition, Fig. 8 and technology shown in Figure 9 disclose in the paragraph of opening the prior art in the 2002-6695 communique such as the spy.
The rear of the lamp unit 1500 when being arranged at the inside of main body 1600, have the cooling with the fan 1610, in the inside of main body 1600, be provided with lamp 1150 be light source optical system, be used to control this optical system and system's (main system) of display image.The light that sends from lamp 1150 is by optical system and projecting lens 1620, and projection forms image here on screen,
Follow projector overall dimensions reduce reduction with cost, the overall dimensions that people require to have the lamp of catoptron reduces and cost reduces, so, carry out from the lamp that has catoptron, removing the trial of light fitting.The present inventor does not know when not adopting the lamp that has catoptron of light fitting and making its work in trial-production, can produce variety of issue, or produce various possibilities.Fig. 1 represents the structure of the lamp that has catoptron that does not have light fitting that the applicant manufactures experimently in a schematic way.Fig. 1 (a) expression does not have the lamp that has catoptron 1001 of light fitting, and Fig. 1 (b) represents exterior guiding line 1104 and outside connecting portion 20 of drawing lead 1204a in the amplification mode.
As shown in Fig. 1 (a), owing in the lamp 1001 that has catoptron, do not have light fitting, so can't be connected the outside and draw lead 1204a by welding with light fitting.In the example shown in Fig. 1 (b),, with welding manner lead 1204a is drawn in exterior guiding line 1104 and outside and be connected by Ni tube (nickel sleeve) 12.More particularly, after the mode that exterior guiding line 1104 is contacted according to the periphery with this connecting portion 20 is inserted Ni tube 12, with lower temperature, exterior guiding line 1104 is connected with Ni tube 12, then, with this Ni tube 12, and draw lead 1204a by the outside that forms such as the Ni-Mn alloy and be connected, thus, realize connecting.Adopt the reason of such method of attachment to be the method for only twining or both direct-connected methods are difficult to realize by welding.
When only the outside being drawn lead 1204a and is wound in method on the exterior guiding line 1104, because with both welding, so be electrically connected (the conducting) that draw between lead 1204a and the exterior guiding line 1104 outside is incomplete.So, have possibility in connecting portion 20 generation discharges, be difficult to adopt the method for only twining.In addition, have and be in high temperature following time owing to constitute the molybdenum of exterior guiding line 1104, crystallization and the character that becomes fragile once more so be difficult to mode by direct welding technically, drawn lead 1204a with exterior guiding line 1104 and outside and are bonded with each other.So employing can be drawn the method that lead 1204a welds with exterior guiding line 1104 and outside at low temperatures, that is, and by the method for Ni tube welding.
But, because Ni tube 12 and outside welding of drawing between the lead 1204a are undertaken by spot welding, so contact area less (almost being a state of contact), go up imposed stress if externally draw lead 1204a, then have this outside and draw the problem that lead 1204a is easy to throw off from connecting portion 20.Particularly, the outside is drawn lead 1204a and is exposed from the outside, so most cases is, causes the outside to draw lead 1204a to come off because of acting on certain stress easily.In addition because the welding between exterior guiding line 1104 and the Ni tube 12 also undertaken by means of spot welds, so if in being exposed to outside Ni tube 12 imposed stress, 12 work of Ni tube then also take place, weld the situation of disengagement.That is, because the weld strength of connecting portion 20 is lower, so the problem that comes off because of the processing welding portion in the assembling is arranged more.
In addition, as shown in Fig. 1 (b), there is not light fitting, so exterior guiding line 1104 and/or outside front end of drawing lead 1204a externally expose, thus, it constitutes antenna, and when particularly adding high pressure pulse when starting, the problem that produces stronger interference also obviously.Particularly in the occasion of the projector that adopts the so digital device of DMD, particularly because less, so the problem of this interference is remarkable to the influence of disturbing etc.In addition, because the front end of line externally exposes, so when the replacing lamp, injured possibility is bigger.Thus, must take consumer itself can't carry out the such measure of replacing of lamp.In addition, for the lamp unit, also have to consider to reduce peristome and form the situation of the structure that can't insert finger etc. from the outside simply, because such structure is particularly in the occasion of the small-sized lamp that has catoptron, according to working, so produce new problem for the disadvantageous mode of cooling.
In addition, in the occasion of the small-sized lamp that has catoptron, the temperature of neck 1306 rises easily, and oxidation takes place the occasion that connects adopting welding easily, consequently, goes back the problem that generation time shortens.Following the raising of manufacturing technology etc., the lamp life-span can extend to the today such as 2000 hours, wishes to get rid of as much as possible the lost of life that such reason causes.
Summary of the invention
The present invention be directed to above-mentioned each side and propose, fundamental purpose of the present invention is to provide a kind of lamp that has catoptron, and this lamp that has catoptron can reduce overall dimensions, reduces cost, and guarantees connection reliability.
The lamp that has a catoptron of the present invention is made of the high-pressure discharge lamp and the catoptron of double ended type, this high-pressure discharge lamp comprises that inner sealing has the luminotron and first and second sealings that extend from the two ends of above-mentioned luminotron of luminescent substance, above-mentioned catoptron will reflect from the light that above-mentioned high-pressure discharge lamp sends, and it is characterized in that: above-mentioned catoptron has wide peristome that penetrates the direction side and the narrow opening portion that is used for fixing above-mentioned high-pressure discharge lamp of being arranged at; First sealing in the above-mentioned high-pressure discharge lamp is fixed near the above-mentioned narrow opening portion of above-mentioned catoptron, and at the above-mentioned first sealing place light fitting is not installed; Second sealing in the above-mentioned high-pressure discharge lamp is arranged at the above-mentioned wide peristome side of above-mentioned catoptron; Above-mentioned first sealing has outward extending from above-mentioned first sealing and exterior guiding line that expose; Said external guide line in above-mentioned first sealing with and the outside that is electrically connected of external circuit draw the plastic flow of lead by the riveted joint parts and engage.
The lamp that another has catoptron of the present invention is made of high-pressure discharge lamp and catoptron, luminotron that the pair of electrodes that comprises this high-pressure discharge lamp relatively disposes in being sealed with the pipe of luminescent substance and first and second sealings that extend from the two ends of above-mentioned luminotron, above-mentioned catoptron will reflect from the light that above-mentioned high-pressure discharge lamp sends, and it is characterized in that: above-mentioned catoptron has wide peristome that penetrates the direction side and the narrow opening portion that is used for fixing above-mentioned high-pressure discharge lamp of being arranged at; First sealing in the above-mentioned high-pressure discharge lamp is fixed near the above-mentioned narrow opening portion of above-mentioned catoptron, and at the above-mentioned first sealing place light fitting is not installed; Second sealing in the above-mentioned high-pressure discharge lamp is arranged at the above-mentioned wide peristome side of above-mentioned catoptron; Above-mentioned first sealing has the structure of a metal forming that is electrically connected in sealing and the above-mentioned pair of electrodes, and in addition, the exterior guiding line is connected with above-mentioned metal forming at the opposition side with above-mentioned electrode place one side; The part of exterior guiding line is positioned at the above-mentioned first sealing inside, and in addition, another part stretches out from the end face of above-mentioned first sealing; The exterior guiding line of above-mentioned first sealing with and the outside that is electrically connected of external circuit draw lead and engage by the plastic flow of riveting parts; The part of above-mentioned riveted joint parts is embedded in above-mentioned first sealing.
In certain suitable embodiment, above-mentioned riveted joint parts are arranged at outside the space that the reflecting surface by above-mentioned catoptron limits.
Preferably, above-mentioned riveted joint parts is covered by bonding agent on every side.
In addition, preferred, the part of above-mentioned first sealing also can be covered by above-mentioned bonding agent.
Preferably, above-mentioned discharge lamp is sealing amount of mercury 150mg/cm
3Above high-pressure mercury-vapor lamp.
Image projection device of the present invention comprises: the above-mentioned lamp that has catoptron; Keep the above-mentioned lamp outer cover that has the lamp of catoptron; Be the optical system of light source with the above-mentioned lamp that has catoptron.
In certain suitable embodiment, the high-voltage pulse that lamp starts usefulness is input to the terminal of exterior guiding line one side that above-mentioned first sealing from the above-mentioned lamp that has a catoptron extends.
In certain embodiment, above-mentioned optical system comprises DMD.
In certain embodiment, above-mentioned high-pressure discharge lamp is the above lamp of 80W.In addition, the above high-pressure discharge lamp of preferred 150W.
In certain embodiment, the maximum gauge of the reflecting surface of above-mentioned catoptron is below 45mm.In certain embodiment, be provided with front glass at the wide peristome place of above-mentioned catoptron.In addition, in certain embodiment, the preferred 200cm of internal capacity in the space that centers on by above-mentioned catoptron and above-mentioned front glass
3Below.
In certain embodiment, above-mentioned riveted joint parts are tubular.In certain embodiment, in the above-mentioned a pair of exterior guiding line every is formed by molybdenum, and above-mentioned riveted joint parts are formed by the material than the molybdenum softness that constitutes the said external guide line.Preferably, above-mentioned riveted joint parts are formed by the inoxidizability excellent material.
Description of drawings
Fig. 1 (a) does not have the figure of composition of the lamp that has catoptron 1001 of light fitting for expression in a schematic way, and Fig. 1 (b) is the enlarged drawing of connecting portion 20.
Fig. 2 is the figure of the composition of the lamp that has catoptron 2000 of representing embodiments of the present invention in a schematic way.
Fig. 3 is the enlarged drawing of connecting portion 20.
Fig. 4 is the figure of the composition of the lamp that has catoptron 2100 of representing embodiments of the present invention in a schematic way.
Fig. 5 is the figure of the composition of the lamp that has catoptron 2200 of representing embodiments of the present invention in a schematic way.
Fig. 6 is the figure of the composition of the lamp that has catoptron 2300 of representing embodiments of the present invention in a schematic way.
Fig. 7 (a) and (b) be the enlarged drawing of connecting portion 20.
Fig. 8 is for representing the figure of the composition of existing lamp unit 1500 in a schematic way;
Fig. 9 (a) is for representing the stereographic map of the composition of existing lamp unit 1500 in a schematic way, and Fig. 9 (b) cuts the structure partial of existing projector main body 1600 open and the stereographic map that schematically illustrates.
Label declaration: 10 riveted joint parts; 20 connecting portions; The 101a sealing; The 101b sealing; 102 electrodes; 103 metal formings (molybdenum foil); 104 exterior guiding lines; 105 luminescent substances (mercury); 106 glass portions; 150 high-pressure discharge lamps; Lead is drawn in 204a, 204b outside; 205 bonding agents (cement); 206 bonding agents; 300 catoptrons; 301 catoptrons; 302 metalworks; 306 necks; 310 catoptrons; 320 narrow opening portions; 1000,1001 lamps that have a catoptron; 1200 light fittings; 1330 front glass; 1400 lamp outer covers (shell); 1500 lamp unit; 1600 projector main body; 2000,2100,2200,2300 lamps that have a catoptron.
Embodiment
With reference to the accompanying drawings, embodiments of the present invention are described.In the accompanying drawing below,, utilize same label to represent to have in fact the building block of identical functions in order to simplify description.
With reference to Fig. 2 and Fig. 3, embodiments of the present invention are described.Fig. 2 is for representing the composition of the lamp that has catoptron 2000 of present embodiment in a schematic way.
The lamp that has catoptron 2000 of present embodiment is made of high-pressure discharge lamp 150 and catoptron 300.The high-pressure discharge lamp 150 of present embodiment comprises: at inner sealing the luminotron (bulb) 100 of luminescent substance (such as, mercury) 105 is arranged, with the sealing 101a, the 101b that extend from the two ends of luminotron 100.The high-pressure discharge lamp 150 of present embodiment is the high-pressure mercury-vapor lamp of double ended type, and it is realized exchanging and lights.
Catoptron 300 constitutes according to the light reflection way that high-pressure discharge lamp 150 is sent.The catoptron 300 of present embodiment is the off-axis paraboloids and ellipsoids mirrors type, and it is one of an inner face catoptron that constitute by the elliptical area body, that formed by thermotolerance glass.In addition, F1 among the figure and F2 are focus.
Catoptron 300 comprises: be arranged at the wide peristome 310 that penetrates the direction side, with the narrow opening portion 320 that is used for fixing high-pressure discharge lamp 150, around the narrow opening portion 320, form neck 306.The sealing 101a of high-pressure discharge lamp 150 (first sealing) is fixed near the narrow opening portion 320 of catoptron 300.The sealing 101b of high-pressure discharge lamp 150 (second sealing) is disposed at wide peristome 310 sides of catoptron 300.Part at catoptron 300 is provided with aperture 303, and this aperture 303 is used to make the outside that is electrically connected with the exterior guiding line 104 of sealing 101b to draw lead 204b to pass through, in the outside of catoptron 300, the metalwork 302 of stainless steel is installed.The outside is drawn lead 204b and is electrically connected with this metalwork 302.
In the present embodiment, on sealing 101a, light fitting is not installed.Sealing 101a is fixed on the neck 306 of catoptron 300 by stable on heating bonding agent 205.In addition, the exterior guiding line 104 of sealing 101a is drawn lead 204a with the outside and is engaged by the plastic flow of riveting parts 10.The outside is drawn lead 204a and is electrically connected with external circuit (not shown).Exterior guiding line 104 is by constituting such as molybdenum, and lead 204a, b are drawn by constituting such as the Ni-Mn alloy in the outside.
Fig. 3 represents connecting portion 20 in the amplification mode, that is, and and around the riveted joint parts 10.In addition, these riveted joint parts 10 are arranged at outside the space that the reflecting surface by catoptron 300 limits.
As shown in Figure 3, from the end of sealing 101a, stretch out and the exposed portions serve 104e of the exterior guiding line 104 that exposes by riveted joint parts 10, draw lead 204a with the outside and engage, in other words, from the outside stress application (arrow the figure) of riveted joint parts 10, thus, realize riveted joint.So the joint of both (104e and 204e) does not pass through welding, and realizes by the plastic flow of riveted joint parts 10.This riveted joint parts 10 such as, be tubular sleeve pipe before plastic yield, in the present embodiment, adopt the cylindraceous riveted joint parts 10 of its internal diameter greater than the external diameter of exterior guiding line 104.
Owing to constitute the material of molybdenum for being difficult to plastic yield of exterior guiding line 104 itself, preferred riveted joint parts 10 are formed by the material than molybdenum softness.As such material, exemplified such as Al, Cu, Ni etc.In addition, because riveted joint position, parts 10 place is because of the position of heating easily such as the contact resistance of electric current or the heat of lamp, so preferably by oxidative resistance excellent material (such as, Al etc.) formation, so that the reliability of lamp is further improved.
Riveted joint parts 10 are such as being cylindric, and its internal diameter, external diameter and length are such as being such, and internal diameter is about 1.0～3.0mm, and external diameter is about 1.5～3.0mm, and length is about 2.0～5.0mm.In the present embodiment, externally the external diameter of guide line 104 is about the occasion of 0.6mm, adopts the riveted joint parts cylindraceous (longitudinal length: be about 3mm) 40 that are about the Al formation of 1.2mm (thickness: be about 0.2mm) by internal diameter.The riveted joint parts 10 cylindraceous that are not limited in the present embodiment to be adopted in addition,, the plastic flow by riveted joint parts 10 get final product, so also can adopt the riveted joint parts such as the U font, two tabular riveted joint parts because realize engaging.
In the discharge lamp 150 of present embodiment, because plastic flow by riveted joint parts 10, lead 204a is drawn in exterior guiding line 104 and outside be bonded with each other, contact at multiple spot, make both realize being electrically connected so can make exterior guiding line 104 and outside draw lead 204a.Thus, even under, exterior guiding line 104 and outside connection reliability of drawing between the lead 204a are improved for the situation of the lamp that has catoptron that does not have light fitting.Promptly, realize that with Ni tube 12 point contacts with exterior guiding line 104 shown in Figure 1, and Ni tube 12 is drawn a lead 1204a realization point contacting structure with the outside and is compared, and the formation of the lamp that has catoptron 2000 of present embodiment can improve the physical strength of connecting portion 20.
In addition, realize that multiple spot contacts,, can reduce exterior guiding line 104 and outside contact resistance of drawing between the lead 204a so compare with structure shown in Figure 1 owing to make exterior guiding line 104 and outside draw lead 204a.So, owing to can reduce the temperature of the connecting portion 20 in lamp when work, so, can make the reliability raising of lamp equally owing to this reason.In addition, because the plastic flow by riveted joint parts 10 makes exterior guiding line 104 and outside draw lead 204a firm engagement, so it is different with the method that outside lead only is wound in the exterior guiding line, do not produce following situation yet, that is it is insufficient that, being electrically connected between lead 204a and the exterior guiding line 104 (conducting) drawn in the outside.In addition, under the structure of present embodiment, owing to can guarantee to a certain degree connection reliability in advance, so under the situation of the whether good inspection of electrical connection that can judgement is realized when not carrying out adopting welding to realize engaging, carry out manufacturing process.Consequently, also can reduce manufacturing cost.
In addition, can make the front end of exterior guiding line 104 and the inside that outside front end of drawing lead 204a is positioned at riveted joint parts 10, its front end does not expose.So, can suppress the situation of this front end, the influence of the interference that is produced in the time of can relaxing the plus high-pressure pulse as antenna.Particularly, have the occasion of DMD in the optical system in image projection device, its effect is remarkable.In addition, because the structure that can not expose by the front end of line forms,, consequently, also can not adopt the structure that is unfavorable for cooling off in order to prevent to damage so can prevent to damage at this front end.In addition, owing to also can not adopt welded type to connect, so can relax the problem of the oxidation of exterior guiding line 104.Obviously owing to do not adopt light fitting, also realize having catoptron lamp overall dimensions reduce reduction with cost.
Formation to the lamp that has catoptron 2000 of present embodiment further specifically describes below.The luminotron 100 of lamp 150 is spherical in shape substantially, and it is made of quartz glass.In addition, for the high-pressure mercury-vapor lamp (particularly, extra-high-pressure mercury vapour lamp) of the excellent characteristic that realizes obtaining long-life etc., as the quartz glass that constitutes luminotron 100, preferred adopt the alkali metal impurity degree lower (such as, various alkali-metal quality are less than 1ppm) highly purified quartz glass.In addition, obviously, also can adopt the quartz glass of common alkali metal impurity degree.The external diameter of luminotron 100 is such as about 5～20mm, and the thickness of glass of luminotron 100 is such as about 1～5mm.The volumetric ratio of the discharge space in the luminotron 100 is as (0.01～1cm about 0.01～1cc
3).In the present embodiment, adopt that external diameter is about 9mm, internal diameter is about 4mm, the capacity of discharge space is the luminotron 100 about 0.06cc.
In the inside of luminotron 100, pair of electrodes (electrode stem) 102 relatively disposes.(such as, 0.6～1.0mm) spacing (arc length) D and be disposed in the luminotron 100, each in the pair of electrodes 102 formed by tungsten (W) front end of electrode 102 about according to 0.2～5mm.At the front end of electrode 102, preferred winding around (such as, the coil of tungsten system) is so that the electrode front end temperature when reducing lamp work.
In the inside of luminotron 100, be sealed with mercury as luminescent substance 105.In the occasion that makes as lamp 105 work of extra-high-pressure mercury vapour lamp, the inside of luminotron 100 enclose have such as, about 150mg/cc or it is above (150～200mg/cc or more than it) mercury and the rare gas (such as argon) of 5～30kPa and a spot of halogen that also has as required.
The halogen that is sealed in the luminotron 100 plays halogen cycle: in lamp work, will turn back to electrode 102 once more from the W (tungsten) of electrode 102 evaporations, such as, it is a bromine.The halogen that is sealed not only is in the form of simple substance, but also can be the form (form of compound) of halogen precursor, in the present embodiment, and according to CH
2Br
2Form, halogen is imported the inside of luminotron 100.In addition, the CH in the present embodiment
2Br
2Sealed vol about 0.0017～0.17mg/cc, as be scaled the lamp halogen atom density in when work, it is equivalent to about 0.01～1 μ mol/cc.In addition, the compressive resistance of lamp 150 (working pressure) is about 15～20MPa or more than it.In addition, preferred, rated power is such as greater than 80W, and in the significant occasion of characteristic of planning to make high output, (the tube wall load of this moment is equivalent to 130W/cm approximately to be preferably 150W
2) or more than it.The tube wall load is for example at 130W/cm
2About more than, do not limit the upper limit especially.As the example shows, because the tube wall duty ratio is as at 130W/cm
2About more than, so can realize 300W/cm
2About (preferably at 130～200W/cm
2About) lamp.In addition, also can realize 300W/cm by cooling device is set
2About above tube wall load.
The maximum gauge of the reflecting surface of catoptron 300 below 45mm, in order further to satisfy the requirement of reduced size, preferred 40mm or less than this value.In addition, also can front glass be installed at wide peristome 310 places of catoptron 300, the inside that also can make catoptron 300 is hermetically-sealed construction.In addition, the internal capacity 200cm of preferred mirror 300
3Below.If provide the catoptron 300 of present embodiment and the size of its focus by example, the diameter phi of then wide peristome 310 is about 45mm, and the depth D r of catoptron 300 is about 33mm.From the deep of catoptron 300, be about respectively about 8mm and about 64mm to the distance of focal point F 1, F2.In addition, the volume of catoptron 300 is about 40000mm
3, that is, and about 40cc.
In addition, also can be as shown in Figure 4, adopt the catoptron 301 of the paraboloidal mirror type that constitutes by parabola by the part of inner face, to replace the catoptron 300 of off-axis paraboloids and ellipsoids mirrors type.In addition, riveted joint parts 10 also can contact with the end face of sealing 101a as shown in Figure 2, also can be as shown in Figure 4, leave with the end face of sealing 101a.
In addition, preferred also as shown in Figure 5, utilize bonding agent 206 to cover to rivet parts 10 around.If like this, around bonding agent covering riveted joint parts 10, thermotolerance is improved.In addition, also can further improve the intensity of connecting portion 20.
Also have,, also can be embedded to the inside of sealing 101a riveting parts 10 as shown in Figure 6.If like this, can pass through sealing 101a, will rivet parts 10 and fix, can improve the intensity of connecting portion 20 in addition.Riveted joint parts 10 are positioned at the inside of sealing 101A, thus, also can protect the exterior guiding line 104 of the inside that is positioned at sealing 101a.In addition, also can adopt the such riveted joint parts 10 of whole coverings of the exterior guiding line 104 that will be positioned at sealing 101a inside.Even adopt structure shown in Figure 6, still can be by around the bonding agent covering riveted joint parts 10.If like this, can improve performances such as thermotolerance.
When forming structure shown in Figure 6, in the time of will sealing in the side pipe portion of easy glass tube of manufacturing process's stage, the part of riveted joint parts 10 can be inserted according to the mode that is positioned at side pipe portion inside,, be realized that sealing process (contraction process or compress operation) gets final product at this state.
Here, Fig. 7 (a) and (b) respectively to amplify the connecting portion of mode presentation graphs 2, structure shown in Figure 3 and structure shown in Figure 6.Fig. 7 (a) is arranged near the structure of sealing 101a for riveted joint parts 10.If in the scope that centers on by dotted line (206) bonding agent is set, then can improves thermotolerance.As above-mentioned, riveted joint parts 10 also can contact with the end face 101e of sealing 101a.Make under the situation of the structure (with reference to Fig. 2) of riveting parts 10 contact end face 101e another effect that will describe below can further being increased in employing.This effect refers to prevent, relax the increase of the thermal capacity of bringing because of riveted joint parts 10, that is, and and because of the situation of so-called creep with exterior guiding line 104 destructions.Promptly, if turn on, close lamp, then follow generation that should situation, exterior guiding line 104 contraction of expanding repeatedly, still, if riveted joint parts 10 are set, because the apparent thermal capacity of exterior guiding line increases, so repression of swelling shrinks, and consequently, can prevent the destruction that creep causes.For extend the exterior guiding line root 104e ' that exposes, do not cover for riveted joint parts 10 from sealing 101a, for the destruction that prevents that creep from causing, riveted joint parts 10 can contact with the end face 101e of sealing 101a.Equally, in the structure shown in Fig. 7 (b), also obtain to prevent the effect of the destruction that creep causes.
The effect that the structure of having removed light fitting by utilization is obtained is described below.As above-mentioned, by adopting riveted joint parts 10 can reduce overall dimensions and reduce cost, and can realize also can guaranteeing the lamp that has catoptron of connection reliability, even and do not having under the situation of light fitting, still obtain further other effect.
In the structure that has light fitting shown in Figure 8, in the occasion of pulse that terminal LA is added high pressure, with occasion to the pulse of terminal LB plus high-pressure, startability good to terminal LB applying pulse the time.So, from the viewpoint of startability, preferably to the terminal LB pulse that adds high pressure.Here, high-voltage pulse is the pulse of starting usefulness of high-pressure discharge lamp, its voltage ratio such as more than the 1kV, typical relatively lamp, such as about 10～15kV, for the lamp of the occasion of low voltage starting type, 5kV following (such as, about 2～5kV).
But,, from design aspect, preferably terminal LA is added pulse although preferably terminal LB is added pulse from the viewpoint of startability.That is, for the pulse that adds high pressure, considering security, insulation distance to a certain degree is essential, at this moment, terminal LB is being added the occasion of pulse, if consider the distance between itself and the lamp outer cover, then overall dimensions can not be reduced.On the other hand, if can be,, owing to have bigger space,, consequently, realize the design of miniaturization easily so guarantee distance between itself and the lamp outer cover easily then in this occasion to terminal LA applying pulse.
The present inventor detects voltage at catoptron 1300 when carrying out that terminal LA added high pressure the experiment of pulse.The magnitude of voltage of catoptron 1300 is greater than the value that detects at terminal LB.That is, find that high-voltage pulse leaks into catoptron 1300.So, the startability variation of terminal LA.If the reason that orientating reflex mirror 1300 leaks is analyzed, then know between metallic light fitting 1200 and catoptron 1300, finally form stray capacitance, know that thus both realize capacitive coupling, leak into catoptron 1300.In the lamp that has catoptron of present embodiment, owing to do not adopt light fitting, leak so can prevent high-voltage pulse orientating reflex mirror, so, can be on terminal LA, the plus high-pressure pulse.Consequently, can realize the lamp that has catoptron of the design of suitable smaller szie, the overall dimensions of lamp unit and image projection device is reduced.
Invention has been described by suitable embodiment above, and still, description like this is not the item that limits, and obviously, can carry out various changes.
In addition, in the above-described embodiment, lamp is that example is described with the high-pressure mercury-vapor lamp, but it is a preferred examples, and lamp also can be xenon lamp, also can be metal halide lamp (comprising mercury free metal halide lamp).In addition, in the above-described embodiment, at sealing mercury greater than 150mg/cm
3High-pressure mercury-vapor lamp (that is, the occasion of extra-high-pressure mercury vapour lamp) be described, still, also can be used for high-pressure mercury-vapor lamp less than this value.In addition, in the above-described embodiment, provided the lamp that exchanges the type of lighting, but be not limited to this, also can light any mode of lighting a lamp that type and direct current light in the type and use according to interchange.In addition, the spacing between the pair of electrodes 102 (arc length) also can be shorter electric arc type (such as less than 2mm), also can be than its big spacing.In addition, the exterior guiding line 104 of the sealing 101b of lamp 150 is drawn being connected also of lead 204b with the outside and can be adopted the riveted joint parts.
Can be with the lamp that has catoptron of above-mentioned embodiment, with optical system combination with image component (DMD (Digital Micromirro Device) panel, liquid crystal panel etc.), composing images projection arrangement (with reference to Fig. 9), such as, can provide the projector (DLP Digital Light Processing (DLP) projector), the liquid crystal projection apparatus that adopt DMD (to comprise and adopt LCOS (silicon liquid crystal: the projector of the reflection-type of structure Liquid Crystal on Silicon)).In addition, not only can be suitable as the light source that image projection device is used at the lamp that has catoptron of present embodiment, but also can be used for other purposes.Such as, also can be used as ultraviolet exposure with light source or stadium with the head lamp of light source, motor vehicle with the light projector of light source, irradiation road markings etc.
According to the lamp that has catoptron of the present invention, because near first sealing that is fixed in the narrow opening portion of catoptron, light fitting is not installed, the exterior guiding line of first sealing and the outside lead of drawing engage by the plastic flow of riveting parts, so can reduce overall dimensions, reduce cost, can guarantee connection reliability.
Claims (14)
1. lamp that has catoptron, formation comprises:
The high-pressure discharge lamp of double ended type, this high-pressure discharge lamp have inner sealing the luminotron of luminescent substance and first and second sealings that extend from the two ends of described luminotron are arranged; With
Catoptron, this catoptron will reflect from the light that described high-pressure discharge lamp sends, and it is characterized in that:
Described catoptron comprises wide peristome that penetrates the direction side and the narrow opening portion that is used for fixing described high-pressure discharge lamp of being arranged at;
Described first sealing in the described high-pressure discharge lamp is fixed near the described narrow opening portion of described catoptron, and at the described first sealing place light fitting is not installed;
Described second sealing in the described high-pressure discharge lamp is arranged at the described wide peristome side of described catoptron;
Described first sealing has from described first sealing and stretches out and the exterior guiding line that exposes;
Described exterior guiding line in described first sealing with and the outside that is electrically connected of external circuit draw the plastic flow of lead by the riveted joint parts and engage.
2. lamp that has catoptron, formation comprises:
High-pressure discharge lamp, this high-pressure discharge lamp comprise luminotron that pair of electrodes relatively disposes and first and second sealings that extend from the two ends of described luminotron in being sealed with the pipe of luminescent substance;
Catoptron, this catoptron will reflect from the light that described high-pressure discharge lamp sends, and it is characterized in that:
Described catoptron comprises wide peristome that penetrates the direction side and the narrow opening portion that is used for fixing described high-pressure discharge lamp of being arranged at;
Described first sealing in the described high-pressure discharge lamp is fixed near the described narrow opening portion of described catoptron, and at the described first sealing place light fitting is not installed;
Described second sealing in the described high-pressure discharge lamp is arranged at the described wide peristome side of described catoptron;
Described first sealing has the structure of a metal forming that is electrically connected in sealing and the described pair of electrodes, and in addition, the exterior guiding line is connected with this metal forming at the opposition side with described electrode place one side;
The part of described exterior guiding line is positioned at the described first sealing inside, and in addition, other parts stretch out from the end face of described first sealing;
The described exterior guiding line of described first sealing with and the outside that is electrically connected of external circuit draw the plastic flow of lead by the riveted joint parts and engage;
The part of described riveted joint parts is embedded in the inside of described first sealing.
3. the lamp that has catoptron according to claim 1 is characterized in that, described riveted joint parts are disposed at outside the space that the reflecting surface by described catoptron limits.
4. the lamp that has catoptron according to claim 2 is characterized in that, described riveted joint parts are disposed at outside the space that the reflecting surface by described catoptron limits.
5. the lamp that has catoptron according to claim 1 is characterized in that, is covered by bonding agent around the described riveted joint parts.
6. the lamp that has catoptron according to claim 2 is characterized in that, is covered by bonding agent around the described riveted joint parts.
7. the lamp that has catoptron according to claim 5 is characterized in that, in addition, the part of described first sealing is also covered by described bonding agent.
8. the lamp that has catoptron according to claim 6 is characterized in that, in addition, the part of described first sealing is also covered by described bonding agent.
9. the lamp that has catoptron according to claim 1 is characterized in that, described discharge lamp is sealing amount of mercury 150mg/cm
3Above high-pressure mercury-vapor lamp.
10. the lamp that has catoptron according to claim 2 is characterized in that, described discharge lamp is sealing amount of mercury 150mg/cm
3Above high-pressure mercury-vapor lamp.
11. an image projection device is characterized in that, comprising:
The described lamp that has catoptron of claim 1;
Keep the described lamp outer cover that has the lamp of catoptron; With
With the described lamp that has catoptron is the optical system of light source.
12. an image projection device is characterized in that, comprising:
The described lamp that has catoptron of claim 2;
Keep the described lamp outer cover that has the lamp of catoptron; With
With the described lamp that has catoptron is the optical system of light source.
13. image projection device according to claim 11 is characterized in that, the high-voltage pulse that lamp starts usefulness is input in the terminal of described exterior guiding line one side that first sealing from the described lamp that has a catoptron extends.
14. image projection device according to claim 12 is characterized in that, the high-voltage pulse that lamp starts usefulness is input in the terminal of described exterior guiding line one side that first sealing from the described lamp that has a catoptron extends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2003101017213A CN1497335A (en) | 2002-10-22 | 2003-10-21 | Lamp with reflector and image projecting device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002306831 | 2002-10-22 | ||
| CNA2003101017213A CN1497335A (en) | 2002-10-22 | 2003-10-21 | Lamp with reflector and image projecting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1497335A true CN1497335A (en) | 2004-05-19 |
Family
ID=34256614
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2003101017213A Pending CN1497335A (en) | 2002-10-22 | 2003-10-21 | Lamp with reflector and image projecting device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1497335A (en) |
-
2003
- 2003-10-21 CN CNA2003101017213A patent/CN1497335A/en active Pending
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