JPH10172509A - High pressure discharge lamp device, image display device, and lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize high optical output and lengthen life by arranging a high pressure discharge lamp and an air flow generating means for generating air flow on the outer surface of the discharge space of a discharge container and arranging them in the specified range. SOLUTION: In formulas I-IV, the maximum thickness in the position other than the boundary with a sealing part 1b of a discharge space 1a is represented by tMAX(mm) and the minimum thickness by tMIN(mm), the surface area by SB(cm<2> ), the rated lamp output by WL (W), and the flow rate on the outer surface of the discharge space 1a of a discharge container 1 by Av(m/sec). In the range of 0.7mm or more of the minimum thickness, when the flow rate is 1m/sec or more, the breakage generating ratio is zero. When the flow rate exceeds 7m/see, a screen illuminance variation ratio drops more than 90%. When the thickness difference exceeds 0.5 mm, the screen illuminance variation ratio drop more than 90%. By synthetically harmonizing a high pressure discharge lamp with an air cooling condition, basic requirements, or high efficiency, high color rendering property, and quick luminous flux rise time are obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a high-pressure discharge lamp device provided with airflow generating means.

[0002]

2. Description of the Related Art Halogen bulbs were initially used as light sources for relatively small projections and floodlights.
Short arc type high pressure discharge lamps having higher efficiency have been adopted. Among short arc type high pressure discharge lamps, a xenon lamp is the most suitable as a light source for projection from the viewpoint of color rendering properties, but it is possible to obtain more efficient and still satisfactory color rendering properties. Small metal halide lamps are increasingly used.

On the other hand, small metal halide lamps have been used not only for projection but also for general lighting such as spotlights and downlights in commercial facilities and the like. In the case of general lighting, a double tube type having an envelope provided outside the arc tube is used for ease of handling.

On the other hand, since a metal halide lamp for projection is housed in a main body case of a projection apparatus, an arc tube is used naked. Then, in order to cool the arc tube, an air exhaust device is generally provided.

The basic performance requirements for this type of high-pressure discharge lamp include high efficiency, high color rendering, shorter luminous flux rise time, high light output stability, and long life.
In the design of the high-pressure discharge lamp, the structure particularly relating to the thickness of the discharge vessel has a great influence on the above-mentioned various characteristics.

In the conventional high-pressure discharge lamp of this type, the following are related to the thickness of the discharge vessel.

Japanese Unexamined Patent Publication No. 6-52829 (Prior Art 1) discloses a range of a maximum thickness and a minimum thickness of a discharge vessel in order to increase the luminous efficiency at the time of start-up of light flux and to increase luminous efficiency. Has been stipulated.

Japanese Unexamined Patent Publication No. 4-32497 (prior art 2) maximizes the thickness near the center of the discharge vessel and increases the thickness near the ends in order to increase the reflection efficiency of the reflector. The thickness is continuously reduced as the water drops.

[0009]

However, it has been found that none of the above-mentioned prior arts can satisfy the above-mentioned basic performance requirements alone.

In general, the thinner the wall thickness, the faster the light flux rises, but if the wall thickness is too thin, the mechanical strength is reduced, and the discharge vessel may be broken during the life. Conversely, if the wall thickness is large, the heat capacity of the discharge vessel increases, and the discharge vessel temperature during stable lighting does not reach the predetermined temperature, so that the vapor pressure of the discharge medium cannot be sufficiently obtained or fluctuates. Therefore, the required light output and light color cannot be obtained or fluctuate.

However, this type of high-pressure discharge lamp is generally lit while being cooled by air as described above.
The inventor has noticed that the influence on the wall thickness of the discharge vessel described above changes greatly depending on the wind cooling conditions.

It is an object of the present invention to provide a high-pressure discharge lamp device in which the basic required performance is improved by comprehensively harmonizing the high-pressure discharge lamp and its cooling conditions, an image display device and a lighting device using the same. With the goal.

[0013]

The high pressure discharge lamp device according to the first aspect of the present invention has a maximum thickness t _MAX (mm), a minimum thickness t _MIN (mm), and a surface area S _B (cm ² ). A fire-resistant discharge vessel having a swelled discharge space portion and a pair of sealing portions integrally formed at both ends of the discharge space portion, a pair of electrodes protruding from the sealing portion and arranged in the discharge space portion, and discharge A high-pressure discharge lamp having a rated lamp power of WL (W) having a discharge medium sealed in a vessel; and an airflow generating an airflow having a flow rate of A _V (m / sec) on an outer surface of a discharge space of the discharge vessel. Means are provided, and the following conditions are satisfied.

[0014] _{t MIN ≧ 0.7 t MAX -t MIN} ≦ 0.5 25 ≦ WL / S B ≦ 60 in the A _V ≦ 7 present invention and the following inventions, specifically defined terms unless otherwise specified and technical meaning Is based on the following.

First, the discharge vessel will be described.

The discharge vessel may be made of any material as long as it is a material which can sufficiently withstand the normal operating temperature of the discharge lamp and can emit radiation generated by the discharge to the outside. For example, quartz glass, translucent alumina, and ceramics such as YAG are allowed.

The discharge space of the discharge vessel has a spindle shape,
In short, any shape such as an elliptical sphere, an oval sphere, or a sphere may be used as long as it swells from the sealing portion. Surface area S _B (cm ² )
It refers to the area of the outer surface of the discharge space. The method of measuring the surface area of the discharge space will be described later.

The thickness is measured at a position avoiding the vicinity of the boundary between the discharge space and the sealing portion.
_{The position of MAX} (mm) and the minimum thickness t _MIN (mm) does not matter. In the present invention, the minimum thickness is 0.7 (m
If it is less than m), the rate of occurrence of breakage of the discharge vessel during its life does not become zero, regardless of the flow velocity of the air flow. That is, when the thickness of the discharge space portion is small, the rising of the luminous flux is good, but the reaction between the enclosure and the discharge container in the middle of the life causes a decrease in the mechanical strength of the discharge container, which may lead to lamp breakage. .

The difference between the maximum thickness and the minimum thickness is 0.5
(Mm) is acceptable. If it exceeds 0.5 (mm), the illuminance of the irradiated surface is too low even if the conditions of the air flow velocity and the minimum wall thickness are satisfied, which is not practical.

Conversely, if the thickness of the discharge vessel is too large, the heat capacity of the discharge vessel increases, and the temperature of the discharge vessel during stable lighting cannot reach the predetermined temperature. For this reason, a sufficient light output and light color cannot be obtained and the output may fluctuate, because a sufficient vapor pressure of the enclosure cannot be obtained. As a result, problems such as insufficient illuminance, uneven color, and fluctuations in light output on the irradiated surface may occur. Therefore,
In the present invention, the above-described basic performance requirements can be satisfied by defining the minimum thickness value and defining the thickness difference as described above. In other words, the required performance cannot be obtained outside the specified range.

Next, the electrodes will be described.

The electrodes are different between the AC lighting system and the DC lighting system, and the present invention may be any of them. In the case of AC lighting, the pair of electrodes have the same structure, but in the case of DC lighting, the cathode and anode have different structures. That is, the cathode is
In order to increase the temperature easily, it can be formed in a thin rod shape and integrated with the electrode shaft. Since the anode generates a large amount of heat,
In order to improve heat dissipation, the mass is increased, and the electrode shaft supporting the mass is also increased.

As a material for the electrode, a refractory metal such as tungsten is used, but for the cathode, triated tungsten can be used to improve electron emission.

The present invention has a particularly remarkable effect in a short arc type high pressure discharge lamp. in this case,
The distance between the electrodes is theoretically preferably shorter, but is practically 5 times or less, preferably 0.5 to 3.0 times the diameter of the anode tip.

Next, the discharge medium will be described.

If it is desired to obtain high luminous efficiency and favorable color rendering properties, a discharge medium is filled with a halide of a luminescent metal, a buffer metal such as mercury, and a starting gas such as argon. As the luminescent metal, for example, dysprosium, cesium, and neodymium can be used as main components, and thallium and / or tin can be added as subcomponents as necessary, and an appropriate amount of iodine and / or bromine can be encapsulated in these components. The high-pressure discharge lamp enclosing the discharge medium described above
It is called a metal halide lamp.

In order to obtain a high-pressure mercury lamp, mercury as a luminescent metal and a starting gas are sealed. To obtain a xenon lamp, enclose xenon.

If the rated lamp power WL / S _B (W / cm ² ) per area of the discharge space is less than 25, the temperature of the discharge space is too low and the vapor pressure of the discharge medium does not become sufficiently high. The desired light quantity and light color cannot be obtained. Conversely, if it exceeds 60, the temperature will be too high and the service life will be short, even if the conditions of the air flow velocity are satisfied.

Next, the airflow generating means will be described.

The air flow acting on the outer surface of the discharge space of the high-pressure discharge lamp may be generated by any method. For example, air may be pushed or sucked by a fan. Airflow may be generated by discharging air by a fan. In addition to using the airflow generating means dedicated to the high pressure discharge lamp, the airflow generating means may be a combined type airflow generating means for cooling together with other mechanisms or components. Further, the airflow does not need to act on the entire high-pressure discharge lamp, but it is sufficient that the airflow acts on at least the discharge space.

If the flow velocity of the air flow is less than 1 (m / sec), sufficient cooling cannot be obtained, which is not possible.
If it exceeds (m / sec), it will be supercooled and the required vapor pressure cannot be obtained.

The flow velocity of the air current can be easily measured by disposing a measuring head of an electric resistance type anemometer in the discharge space of the high pressure discharge lamp.

Thus, in the present invention, by satisfying the above conditions, the high pressure which can satisfy the basic required performances of high efficiency, high color rendering, short luminous flux rise time, light output stability and long life can be satisfied. A discharge lamp device can be obtained.

The high-pressure discharge lamp device according to the second aspect of the present invention
The high-pressure discharge lamp device according to claim 1, wherein the following conditions are satisfied.

0.9 ≦ t _MIN ≦ 1.5 t _MAX −t _MIN ≦ 0.3 35 ≦ WL / S _B ≦ 501 1 ≦ A _V ≦ 5 In the present invention, the invention of claim 1 is generally applicable. Is specified, but a preferable range is specified.

The high pressure discharge lamp device according to the third aspect of the present invention
The high-pressure discharge lamp device according to claim 1 or 2,
Is characterized by satisfying the following conditions.

1.0 ≦ t _MIN ≦ 1.3 t _MAX −t _MIN ≦ 0.1 40 ≦ WL / S _B ≦ 452 2 ≦ A _V ≦ 4 The present invention defines an optimum range.

A high pressure discharge lamp device according to a fourth aspect of the present invention
4. The high-pressure discharge lamp device according to claim 1, further comprising a reflecting mirror integrated with the high-pressure discharge lamp so as to collect light emitted from the high-pressure discharge lamp. I have.

By integrating the reflecting mirror,
Since the optical performance is easily exhibited, it is suitable for a projection type image display device for a liquid crystal projector or an overhead projector.

According to a fifth aspect of the present invention, there is provided a high pressure discharge lamp device comprising:
The high-voltage discharge device according to any one of claims 1 to 4, wherein one of the electrodes is a cathode and the other is an anode.

The present invention is a high pressure discharge lamp device for DC lighting. In this type of high-pressure discharge lamp device, in order to maintain the temperature of the cathode in a predetermined range, a heat insulating material may be provided on the outer surface of the discharge vessel in the vicinity of the cathode. Since it is located on the top side of the reflecting mirror, the light that is going to enter the vicinity of the top of the reflecting mirror is not blocked by the heat insulating material, and the effective light amount does not decrease. Therefore, the effective light amount can be increased.

The high-pressure discharge lamp device according to claim 6 is
6. The high-pressure discharge lamp device according to claim 5, wherein the high-pressure discharge lamp includes a base made of an insulator mounted on a sealing portion on the anode side of the discharge vessel, and is mounted on the top of the reflecting mirror via the base. It is characterized by being.

The present invention defines a structure for coupling a high-pressure discharge lamp and a reflector. The base and the reflector top can be fixed by, for example, base cement.

According to a seventh aspect of the present invention, there is provided a high pressure discharge lamp device comprising:
The high-pressure discharge lamp device according to any one of claims 1 to 6, wherein the discharge medium is a rare gas, mercury, or a halide of a luminescent metal, and the luminescent metal is dysprosium;
It is characterized by containing cesium and neodymium as main components.

The high-pressure discharge lamp obtained by the present invention is a so-called metal halide lamp, and the combination of luminescent metals can provide the optical characteristics required for a liquid crystal projector, ie, luminous intensity, correlated color temperature, color rendering, and luminous efficiency. Ideal for liquid crystal projectors. However, it goes without saying that the liquid crystal projector can be used other than the liquid crystal projector.

The high pressure discharge lamp device according to the invention of claim 8 is
The high-pressure discharge lamp device according to any one of claims 1 to 7, wherein the airflow generating means is an exhaust means.

When an air current is generated on the outer surface of the discharge space portion of the discharge vessel by the exhaust means, almost the entire discharge space portion is easily brought into uniform contact with the air flow, so that good cooling can be achieved.

According to a ninth aspect of the present invention, there is provided an image display device comprising: the high-pressure discharge lamp device according to any one of the fourth to eighth aspects;
Image display means for irradiating light emitted from the high-pressure discharge lamp and condensed by the reflecting mirror from the back; image control means for controlling the image display means; and a screen for condensing light transmitted through the image display means , And a main body case for accommodating the above-mentioned components.

According to the present invention, it is possible to provide an image display device such as a liquid crystal display device and an overhead projector provided with a high-pressure discharge lamp device which satisfies the basic required performance.

According to a tenth aspect of the present invention, in the image display device of the ninth aspect, the airflow generating means is an exhaust cooling means provided in the main body case.

In the present invention, the structure of the image display device can be simplified and made compact by applying the exhaust cooling means to each mechanism or component housed in the main body case in common.

A lighting device according to an eleventh aspect is characterized by comprising: a lighting device main body; and the high-pressure discharge lamp device according to any one of the first to eighth aspects disposed on the lighting device main body. I have.

The present invention applies to all devices that use a high-pressure discharge lamp for any lighting. For example, the present invention can be applied to a lighting fixture, a signal light device, and the like. As the lighting fixture, the present invention can be implemented for any lighting such as an indoor downlight, a ceiling-mounted light, and a spotlight.

[0054]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partially sectional front view showing a high-pressure discharge lamp according to an embodiment of the high-pressure discharge device of the present invention.

In the figure, 1 is a discharge vessel, 2 is an anode, 3
Is a cathode, 4 is an anode lead, 5 is a cathode lead, 6 is a base, and 7 is a power supply line.

The high-pressure discharge lamp of this embodiment is a metal halide lamp having a rated lamp power of 250 W.

The discharge vessel 1 is made of quartz glass, has an arc having a maximum outer diameter of 13.5 (mm) and a radius of 10.5 (mm) in the center, and has a spindle-shaped discharge space having a length of 14 (mm). Part 1a and a pair of sealing parts 1b1, 1
b2. The outer surface area of the discharge space 1a is 5.1 (cm ² ). 1c denotes sealing portions 1a1, 1
A sealing metal foil buried in a2 introduces a current from the outside to the electrode axis, and hermetically seals the inside of the discharge space 1a. is there.

In the discharge vessel 1, about 6.7 × 10 ⁴ (Pa) of argon gas and about 40 (mg) of mercury are used as a discharge medium.
And a light emitting metal halide 2 (mg). The halide consists of a compound of a main component consisting of dysprosium Dy, indium In, neodymium Nd and cesium Cs, and bromine and iodine.

The distance between the anode 2 and the cathode 3 is about 3
(Mm).

FIG. 2 is a schematic diagram for explaining a method for calculating the outer surface area when the discharge space 1a has a spindle shape.

The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The spindle-shaped portion is an arc of revolution having a curvature r (cm), an inner end length 2b (cm), and a maximum outer diameter 2a (cm) centered on points P ₁ and P ₂ , respectively. Further, if the areas of the end faces of the sealing portions 1b1 and 1b2 are S _s1 and S _s2 (cm ² ), in the present invention, the external surface area S
(Cm ² ) is determined by the following equation.

S = 4π−r [b− (r−a) sin ⁻¹ b
/ R]-(S _s1 + S _s2 ) In the present invention, the discharge space portion 1a and the sealing portion 1a
The boundary between the discharge space material 1 and 1a2 is a portion where the discharge vessel material of the discharge space portion first approaches the electrode axis inside the discharge space portion 1a.

FIG. 3 is a schematic diagram for explaining a method for calculating the outer surface area when the discharge space is elliptical spherical.

The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The outer minor axis of the ellipse is a (cm) and the outer major axis is b
(Cm), the area of the end faces of the sealing portions 1b1 and 1b2 is S _s1 ,
Assuming that S _s2 (cm ² ), in the present invention, the outer surface area S (cm ² ) of the discharge space 1a is determined by the following equation.

S = 2π (a ² + sin ⁻¹ xx × ab / x)
− (S _s1 + S _s2 )

[0069]

(Equation 1) FIG. 4 is a schematic diagram for explaining a method of calculating the outer surface area when the discharge space is oval.

The same parts as those in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

The maximum outer diameter of the oval is 2r (cm), the depth of the spherical portion is h (cm), the length of the cylindrical portion is t (cm), and the area of the end face of the sealing portions 1b1 and 1b2 is S _s1. , S _s2 (c
m ² ), in the present invention, the outer surface area S (cm ² ) of the discharge space 1a is determined by the following equation.

S = πr (4r−h) + 2πrt− (S _s1 + S _s2 ) Although not shown in the drawing, when the discharge space is spherical, the radius is r (cm) and the area of the end face of the sealing portion is To S _s1 and S _s2 (c
m ² ), it can be obtained by the following equation.

S = 4πr ² − (S _s1 + S _s2 ) Next, the results of an experiment performed to confirm the effects of the present invention will be described.

Table 1 is a table showing the rate of occurrence of breakage during the life of the high-pressure discharge lamp when the minimum thickness of the discharge space and the flow velocity of the air flow for cooling the discharge space are changed. The evaluation was performed with the difference in thickness between the maximum thickness t _MAX and the minimum thickness t _{MIN being} 0.

[0075]

[Table 1] As is clear from Table 1, in the range where the minimum thickness is 0.7 mm or more, the breakage occurrence rate is 0 if the flow rate is 1 m or more.

FIG. 5 is a graph showing the results of an experiment on the change in the change rate of the illuminance at the center of the screen when the flow velocity of the airflow flowing on the outer surface of the discharge space is changed.

In the figure, the horizontal axis represents the flow velocity of the air current (m / sec).
c), and the vertical axis indicates the screen illuminance change rate (%), respectively.

As is clear from the figure, the flow velocity is 7 (m
/ Sec), the screen illuminance change rate falls below 90%.

FIG. 6 is a graph showing the results of an experiment on the change in the rate of change in the illuminance at the center of the screen when the thickness difference in the discharge space is changed.

In the figure, the abscissa indicates the thickness difference (mm), and the ordinate indicates the screen illuminance change rate (%).

As is clear from the figure, the difference in thickness is 0.5
(Mm), the rate of change in screen illuminance drops below 90%.

FIG. 7 is a partially sectional front view showing a high-pressure discharge lamp with a reflector in another embodiment of the high-pressure discharge lamp device of the present invention.

The same parts as those in FIG. 1 are denoted by the same reference numerals, and description thereof will be omitted.

The present embodiment is characterized in that a reflecting mirror is integrated. That is, although the reflecting mirror 8 is formed by glass molding, the reflecting mirror 8 has a cylindrical neck portion 8a at the top,
A reflective film 8c that reflects visible light and transmits infrared light is applied to the inner surface of the reflector main body 8b. Also, the reflecting mirror main body 8
A through hole 8d is formed in b. The high-pressure discharge lamp 9 has the base 6 fixed to the neck 8a via the base cement 10. In addition, the power supply line 7 passes through the through hole 8d of the reflecting mirror and is led out to the rear side of the reflecting mirror.

Reference numeral 11 denotes a ballast which may be operated electronically or may be composed of an iron core and a coil.

FIG. 8 is a conceptual sectional view showing an embodiment of the high-pressure discharge lamp device and the image display device of the present invention.

In the figure, the same parts as those in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted.

Reference numeral 12 denotes a liquid crystal image display means, 13 denotes an image control means, 14 denotes an AC power supply, 15 denotes an optical system, 16 denotes a main body case, 17 denotes an air discharge means, and 18 denotes a wind direction control means.

The liquid crystal image display means 12 displays an image to be projected by liquid crystal, and is illuminated from the back by a high-pressure discharge lamp 9 having a reflecting mirror 8 shown in FIG.

The image control means 13 comprises the liquid crystal image display means 1
2 for driving and controlling, and if necessary, a television receiving means can be provided.

The AC power supply 14 supplies power to the image control means 13, the stabilizer 11, and the air discharge means 17.

The optical system 15 collects the light transmitted through the liquid crystal image display means 12 and projects it on a screen (not shown).

The main body case 16 houses the above components.

The air discharging means 17 is disposed at an appropriate place of the main body case 16, for example, at the rear surface thereof, and cools a heat-generating mechanism or component housed in the main body case 16. During this series of cooling, an airflow having a predetermined flow velocity is also generated around the discharge space of the high-pressure discharge lamp 9.

The wind direction control means 18 is formed in the main body case 16 as needed to form an airflow having a predetermined flow velocity around the discharge space. In the illustrated embodiment, the body case 1
Fresh air is sucked from the outside through the wind direction control means 18, first flows around the high pressure discharge lamp 9 to cool the high pressure discharge lamp, and then the liquid crystal image display means 12, the image control means 13, The heat-generating components such as the vessel 11 are cooled and discharged from the exhaust means 17 to the outside of the main body case 16.

[0096]

According to each of the first to eighth aspects of the present invention, the high-pressure discharge lamp and its wind-cooling conditions are comprehensively harmonized to provide the basic required specifications, that is, high efficiency, high color rendering, and faster light flux rise. It is possible to provide a high-pressure discharge lamp device having improved stability in time, high light output, and long life.

According to the second aspect of the present invention, it is possible to provide a high-pressure discharge lamp device having more favorable effects.

According to the third aspect of the present invention, it is possible to provide a high-pressure discharge lamp device capable of obtaining an optimum effect.

According to the fourth aspect of the present invention, it is possible to provide a high-pressure discharge lamp device which is provided with an integral reflecting mirror and easily exhibits optical characteristics.

According to the fifth aspect of the present invention, it is possible to provide a high-pressure discharge lamp device having an increased effective light amount because the anode is located on the top side of the reflecting mirror.

According to the sixth aspect of the present invention, it is possible to provide a high-pressure discharge lamp device in which the coupling structure between the reflector and the high-pressure discharge lamp is specified.

According to the seventh aspect of the present invention, it is possible to provide a high-pressure discharge lamp device which is a metal halide lamp whose optical characteristics are optimal for a liquid crystal projector.

According to the eighth aspect of the present invention, it is possible to provide a high-pressure discharge lamp device in which a desired airflow is generated around the discharge space and cooling is improved.

According to the ninth and tenth aspects of the present invention, it is possible to provide an image display apparatus having the effects described in the first to eighth aspects.

According to the tenth aspect, it is possible to provide a small-sized image display device in which the cooling means is simplified.

According to the eleventh aspect, it is possible to provide a lighting device having the effects described in the first to eighth aspects.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing a high-pressure discharge lamp in one embodiment of a high-pressure discharge lamp device of the present invention.

FIG. 2 is a schematic diagram for explaining a method of calculating an outer surface area when a discharge space portion has a spindle shape.

FIG. 3 is a schematic diagram illustrating a method for calculating an outer surface area when a discharge space portion is elliptical spherical.

FIG. 4 is a schematic diagram illustrating a method for calculating an outer surface area when a discharge space portion has an elliptical spherical shape.

FIG. 5 is a graph showing the results of an experiment on the change in the rate of change of the illuminance at the center of the screen when the flow velocity of the airflow flowing on the outer surface of the discharge space is changed.

FIG. 6 is a graph showing the results of an experiment on the change in the rate of change of the illuminance at the center of the screen when the thickness difference of the discharge space is changed.

FIG. 7 is a partially sectional front view showing a high-pressure discharge lamp with a reflector in another embodiment of the high-pressure discharge lamp device of the present invention.

FIG. 8 is a conceptual sectional view showing an embodiment of the high-pressure discharge lamp device and the image display device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Discharge vessel 1a ... Discharge space part 1b1 ... Sealing part 1b2 ... Sealing part 1c ... Sealing metal foil 2 ... Anode 3 ... Cathode 4 ... Anode lead wire 5 ... Cathode lead wire 6 ... Base 7 ... Feeding wire

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Mamoru Furuya 4-3-1 Higashishinagawa, Shinagawa-ku, Tokyo Inside Toshiba Litec Corporation

Claims (11)

[Claims] 1. The maximum thickness is t _MAX (mm) and the minimum thickness is t
A fire-resistant discharge vessel having a _MIN (mm) and a bulged discharge space portion having an outer surface area of S _B (cm ² ) and a pair of sealing portions integrally formed at both ends in the discharge space portion; A high-pressure discharge lamp having a rated lamp power of WL (W), comprising a pair of electrodes protruding from the discharge space and a discharge medium sealed in the discharge vessel; and an outer surface of the discharge space of the discharge vessel. A high-pressure discharge lamp device comprising: an airflow generating means for generating an airflow having a flow velocity of A _V (m / sec). t _MIN ≧ 0.7 t _MAX −t _MIN ≦ 0.5 25 ≦ WL / S _B ≦ 601 1 ≦ A _V ≦ 7 2. The high-pressure discharge lamp device according to claim 1, wherein the following conditions are satisfied. 0.9 ≦ t _MIN ≦ 1.5 t _MAX −t _MIN ≦ 0.3 35 ≦ WL / S _B ≦ 50 1.5 ≦ A _V ≦ 5 3. The high-pressure discharge lamp device according to claim 1, wherein the following conditions are satisfied. 1.0 ≦ t _MIN ≦ 1.3 t _MAX −t _MIN ≦ 0.1 40 ≦ WL / S _B ≦ 45 2 ≦ A _V ≦ 4 4. The high-pressure discharge lamp according to claim 1, further comprising a reflector integrated with the high-pressure discharge lamp so as to condense the light emitted from the high-pressure discharge lamp. High pressure discharge lamp device. 5. The high-pressure discharge lamp device according to claim 4, wherein one of the electrodes is a cathode, the other is an anode, and the electrode is arranged on the top side of the reflecting mirror. 6. The high-pressure discharge lamp has a base made of an insulator mounted on a sealing portion on the anode side of the discharge vessel, and is attached to the top of the reflecting mirror via a base. The high pressure discharge lamp device according to claim 4 or 5, wherein 7. The discharge medium is a rare gas, mercury and a halide of a luminescent metal, wherein the luminescent metal is dysprosium,
The high-pressure discharge lamp device according to any one of claims 1 to 6, wherein cesium and neodymium are the main components. 8. The high-pressure discharge lamp device according to claim 1, wherein the airflow generating means is an exhaust means. 9. A high-pressure discharge lamp device according to any one of claims 4 to 8, and image display means for irradiating light emitted from the high-pressure discharge lamp and condensed by a reflecting mirror from behind.
An image control means for controlling the image display means; an optical system for condensing light transmitted through the image display means and projecting the light on a screen; and a main body case for accommodating the above components. Image display device. . 10. The image display device according to claim 9, wherein the airflow generating means is an exhaust cooling means provided in the main body case. 11. A lighting device comprising: a lighting device main body; and the high-pressure discharge lamp device according to claim 1 disposed on the lighting device main body.