KR20050069370A - Apparatus for cooling bulb of super high pressure mercury lamp - Google Patents

Apparatus for cooling bulb of super high pressure mercury lamp Download PDF

Info

Publication number
KR20050069370A
KR20050069370A KR1020030101398A KR20030101398A KR20050069370A KR 20050069370 A KR20050069370 A KR 20050069370A KR 1020030101398 A KR1020030101398 A KR 1020030101398A KR 20030101398 A KR20030101398 A KR 20030101398A KR 20050069370 A KR20050069370 A KR 20050069370A
Authority
KR
South Korea
Prior art keywords
bulb
high pressure
pressure mercury
mercury lamp
flow
Prior art date
Application number
KR1020030101398A
Other languages
Korean (ko)
Inventor
복기소
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Priority to KR1020030101398A priority Critical patent/KR20050069370A/en
Publication of KR20050069370A publication Critical patent/KR20050069370A/en

Links

Abstract

The present invention relates to a bulb cooling device of an ultra-high pressure mercury lamp such that the point having the maximum cooling performance in the projection display device regardless of the vertical inversion of the projection device is located at the upper end of the bulb of the ultra-high pressure mercury lamp. In the projection display device having a rotating joint formed in the central portion by dividing the discharge port of the bulb cooling blower of the lamp; And a rotary flow screening plate coupled to the rotary joint to adjust the discharge direction in the blower by rotating about the rotary joint so that it always faces in the direction of gravity.

Description

Bulb cooling device of ultra-high pressure mercury lamp {Apparatus for cooling bulb of super high pressure mercury lamp}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projection display device, and more particularly, to a bulb cooling device of an ultra-high pressure mercury lamp in which a point having maximum cooling performance is located at the upper end of a bulb of an ultra-high pressure mercury lamp regardless of the vertical inversion of the projection device. .

Recently, various models of projection televisions and projectors have been developed and marketed according to the spread of large-screen display devices.

All projection television and projector devices are essentially composed of an ultra-high pressure mercury lamp. A blower is used to cool the bulb of the ultra-high pressure mercury lamp to cool the high heat of the ultra-high pressure mercury lamp.

Against this background, there is a demand for a method of efficiently cooling a bulb of an ultra-high pressure mercury lamp, which is a core device of a projection television and a projector.

Referring to the bulb cooling of the ultra-high pressure mercury lamp of the prior art with reference to the accompanying drawings as follows.

1A and 1B are arc infrared photographs and schematic diagrams of bulbs of an ultrahigh pressure mercury lamp.

The ultra-high pressure mercury lamp is a lamp using visible and ultraviolet rays generated by the discharge of high-pressure mercury vapor in the bulb, and the bulb is usually filled with a main electrode, an auxiliary electrode, mercury, and an argon gas for easy starting.

When power is applied, mercury in the bulb evaporates as heat is generated by discharge, and bulb temperature rises with time, thereby stabilizing lamp characteristics.

1A and 1B illustrate light emission and exothermic shapes in an ultra-high pressure mercury lamp, in which boomerang-type light emission is generated around mercury electrodes on both sides.

This is a phenomenon in which the ionized ultra-high pressure mercury, which emits light and generates heat, becomes dense due to heat, and buoyancy is generated to be directed in the opposite direction of gravity. The bulb has a higher temperature at the upper end than at the lower end.

Therefore, keeping the bulb top below the maximum permissible temperature is an important factor.

In contrast, the bottom of the bulb has a lower rise temperature than the top of the bulb, and it is important to maintain the proper temperature to maintain the inside of the bulb at a very high pressure rather than cooling the bottom of the bulb.

In particular, the fixing method of the projector uses two opposite methods of positioning the projector on a table or inverting (upside down) the ceiling.

Therefore, there is a need for a method that can satisfy the cooling conditions even when the bulb of the ultra-high pressure mercury lamp is changed depending on the fixing method of the projector.

2A and 2B show the configuration of a cooling device for bulb cooling in an ultrahigh pressure mercury lamp.

First, FIG. 2A shows the bulb cooling device configuration and flow in the blower when the projector employing the ultra-high pressure mercury lamp is placed on the floor.

2B shows the bulb cooling device configuration and flow in the blower when the projector is attached to the ceiling.

The bulb cooling device of the ultra-high pressure mercury lamp utilizes a flow obstruction plate 21 to ensure that the flow from the fixed cooling blower 20 is always directed towards the top of the bulb.

In the case of FIG. 2A which shows the case where the projector (the upper portion of A and the lower portion of B) is placed on the floor, the projector is installed as it is without inversion, so the 'A' portion is the upper portion of the lamp and the 'B' portion is the lamp. Becomes the bottom of.

Here, the air outlet of the blower 20 is adjusted by the flow shielding plate 21 so that the point having the maximum cooling performance and the maximum pressure point are formed in part (a) of FIG. 2A.

In the case of FIG. 2B showing the case where the projector (the upper portion of A and the lower portion of B) is attached to the ceiling, the projector is attached upside down, so that the portion 'B' is the upper portion of the lamp and the portion 'A' is the upper portion of the lamp. To the bottom.

Here, the air outlet of the blower 20 is adjusted by the flow shielding plate 21 so that the point having the maximum cooling performance and the maximum pressure point are formed in part (b) of FIG. 2B.

Thus, the flow shielding plate 21 for adjusting the position of the air outlet of the blower according to the installation of the projector on the floor or the ceiling is configured in the housing 31 having the movement guide and the ball for the movement of the flow shielding plate 21. The bearing 32 is a structure comprised in the movement guide.

When the flow shielding plate 21 is installed on the floor without upside down of the projector as shown in FIG. 3A, the flow shielding plate 21 moves in the direction of 'B' of the housing 31 by its own weight, and thus 'A' The air outlet is formed in the 'portion.

In addition, when the top and bottom of the projector is inverted and installed on the ceiling as shown in FIG. 3B, the flow screening plate 21 moves in the direction of 'A' of the housing 31 by its own weight, and thus 'B' The air outlet is formed in the 'portion.

However, since the driving power of the flow shielding plate used in the bulb cooling device of the ultra-high pressure mercury lamp of the prior art is self-weighted, there is a disadvantage that it is not completely restrained during operation.

4A and 4B are diagrams showing problems in driving a flow shield plate of the bulb cooling device of the prior art.

Since the moving blind plate for adjusting the position of the blower air outlet for cooling the bulb of the lamp according to the installation situation of the projector is driven only by its own weight, there is a possibility that the flow blind plate cannot be positioned at a desired point.

For example, as shown in Figs. 4A and 4B, when the projector is installed in an inclined state by θ, mgcos θ <mg μsin θ and the flow shielding plate stops without moving downward due to its own weight.

Where m is mass, g is gravitational acceleration, and m is mass.

As described above, a problem occurs when the projector is attached to the ceiling in addition to the case where the projector is inclined to the floor.

In addition to such a problem, when dust or the like is attached to a moving guide that allows the moving screen to move, the moving screen may not be moved by its own weight, thereby degrading lamp performance and ultimately affecting the image quality of the projector.

The present invention is to solve the problem of the bulb cooling device of the ultra-high pressure mercury lamp of the prior art as described above, in the projection display device adopting the ultra-high pressure mercury lamp, the point having the maximum cooling performance irrespective of the up and down reversal of the projection device ultra-high pressure It is an object of the present invention to provide a bulb cooling device of an ultra-high pressure mercury lamp, which is located at the upper end of a bulb of a mercury lamp.

The bulb cooling device of the ultra-high pressure mercury lamp according to the present invention for achieving the above object, in the projection display device having an ultra-high pressure mercury lamp, the rotary joint is divided into a central portion by dividing the discharge port of the blower for bulb cooling of the lamp; It is characterized in that it comprises a rotary flow screening plate coupled to the rotary joint to adjust the discharge direction in the blower by rotating so as to always rotate in the direction of gravity about the rotary joint.

And it is characterized in that it further comprises a cover plate support protrusions configured to protrude to the blower outlet port so that the rotational flow shielding plate is inclined by the protrusion size without facing in the direction of gravity.

And the discharge direction is adjusted by the rotary flow screen plate is characterized in that the flow of the blower is biased to the upper end of the bulb.

Other objects, features and advantages of the present invention will become apparent from the following detailed description of the embodiments.

A preferred embodiment of the bulb cooling device of the ultra-high pressure mercury lamp according to the present invention will be described in detail with reference to the accompanying drawings.

Figures 5a and 5b is a block diagram of the bulb cooling device of the ultra-high pressure mercury lamp according to the present invention, Figures 6a and 6b is a block diagram when driving the flow shield plate of the bulb cooling device according to the present invention.

The present invention is to secure the accuracy of the operation of the flow screen plate for vertical movement in the cooling device using the bulb heating characteristics of the ultra-high pressure mercury lamp to ensure that the ultra-high pressure mercury lamp is cooled on the top of the bulb that requires a greater cooling effect regardless of the up and down inversion It is a cooling device to be biased.

The present invention constitutes a rotary joint at a position that bisects the blower discharge port so that the bulb cooling of the ultra-high pressure mercury lamp, which is a key component of the projection television and the projector device, can be stably achieved, and the flow shielding plate is coupled to the rotary joint to flip. It is configured to be rotatable in the form.

In the overall configuration, when the upper portion of the projector is referred to as the 'A' direction and the lower portion is the 'B' direction, the rotary joint configured at a position bisecting the blower discharge port 51 for discharging cooling air to the bulb of the ultra-high pressure mercury lamp ( 53 and a rotary flow screen plate 52 coupled to the rotary joint 53 to selectively block the blower discharge port.

Here, the rotation flow shielding plate 52 rotates in a flip shape around the rotation joint 53 according to the direction in which the projector is installed to bisect the flow outlet 51 to block the flow in any one direction.

As such, the flow in the blower causes the lamp to always be biased at the top of the bulb by means of the rotating flow shielding plate so that the maximum pressure point and the maximum cooling performance point occur at the top of the bulb and the flow rate is also increased. In addition, the lower end portion of the bulb contributes to the cooling of a relatively small amount of flow rate compared to the upper end portion due to the flow recirculation zone generated by the flow blocking plate.

The operation of the flow shielding plate is made by distinguishing FIG. 5A illustrating the case where the projector is installed on the floor and FIG. 5B which illustrates the case where the projector is installed by inverting the ceiling up and down.

First, as shown in FIG. 5A, when the projector (when A is at the top and B is at the bottom) is installed on the floor without inverting up and down, the rotary flow screening plate 52 is caused by its own weight around the rotary joint 53. Move exactly in the 'B' direction so that the maximum pressure point and maximum cooling performance point occur at the top of the bulb.

That is, since the gravity direction is downward in the normal state without the upside down of the projector, the flip-flow rotating screen 52 prevents the lower side of the blower discharge port 51 so that the flow is biased upward.

As shown in FIG. 5B, when the projector (when A is at the top and B is at the bottom) is installed upside down on the ceiling, the rotary flow shielding plate 52 is formed by the self-weight around the rotary joint 53. Move precisely in the A 'direction so that the maximum pressure point and maximum cooling performance point occur at the top of the bulb.

That is, the direction of gravity is changed so that the flow shielding film 52 covers the other half of the blower discharge port 51 so that the flow direction is changed.

5A and 5B illustrate an intermediate state in which the rotating flow shielding plate 52 moves in the corresponding direction, for the purpose of understanding.

In practice, the rotary flow shielding plate 52 bisects the blower discharge port 51 to completely block either one.

Since the present invention allows the flow shielding plate to automatically rotate so that the bottom of the discharge portion of the blower is always blocked, the flow may always be biased at the bulb upper end of the ultra-high pressure mercury lamp regardless of the installation method of the projector.

In addition, the contact area of the rotary joint is very small compared to the linear movement of the moving screen, which ensures stable operation, and is less susceptible to debris, and can be constructed at a lower cost than using bearings. have.

On the other hand, even if some deterioration occurs in the vicinity of the joint by long-term use, the blower discharge operation is continued without interruption, and thus the reliability of the operation can be doubled.

The bulb cooling device of the ultra-high pressure mercury lamp according to the present invention is configured to install a rotary joint in the center of the blower discharge port and to configure the flow screen to rotate about this joint, and to completely block either side of the blower discharge port and to incline a predetermined angle. It can be divided into a configuration that prevents.

FIG. 6A illustrates a case in which the rotary flow screening plate is completely blocked by dividing the discharge port of the blower, and FIG. 6B illustrates a blocking plate support protrusion 54a at the blower discharge port 51 for smoother operation of the rotary flow screening plate. (54b) is configured so that the rotating flow screen plate 52 has a specific angle (α) with respect to the direction of gravity.

This is because the blocking flow support plate 52 has a certain angle with respect to the direction of gravity due to the blind plate support projection can ensure a smooth operation, even if the projection device is installed with a specific inclination flow shielding It is to prevent the plate from sticking to the discharge port.

Of course, this invention is not limited to the above-mentioned embodiment, but can also be comprised by various other methods.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the present invention.

Therefore, the technical scope of the present invention should not be limited to the contents described in the embodiments, but should be defined by the claims.

The bulb cooling device of the ultra-high pressure mercury lamp according to the present invention has the following effects.

First, since the discharge opening of the blower for bulb cooling can always be formed to the maximum cooling point at the upper end of the bulb can improve the performance and life of the lamp.

This has a good effect on maintaining the characteristics of the projector.

Secondly, since the discharge direction of the cooling flow can be maintained accurately, the bulb cooling of the ultra-high pressure mercury lamp can be made low air flow rate can be reduced.

This enables the reliability and high quality of the product.

Third, bulb cooling of the ultra-high pressure mercury lamp can be efficiently performed without the risk of malfunction, regardless of the installation method of the projector.

Fourth, the contact area of the rotary joint is very small as compared with the linear movement of the flow blocking plate to ensure a stable operation.

In addition, it is a structure that can be less affected by foreign matters, etc., is advantageous in terms of manufacturing cost compared to using a bearing or the like.

1A and 1B are arc infrared photographs and a schematic configuration diagram of a bulb of an ultrahigh pressure mercury lamp;

2A and 2B are schematic views of a bulb cooling device of a conventional high pressure mercury lamp.

3a and 3b is a block diagram of a flow shield plate of the bulb cooling device of the prior art.

4a and 4b is a configuration diagram showing a problem when driving the flow shield plate of the bulb cooling device of the prior art.

5a and 5b is a configuration diagram of the bulb cooling device of the ultra-high pressure mercury lamp according to the present invention.

6a and 6b is a block diagram of the flow shield plate driving of the bulb cooling device according to the present invention.

Explanation of symbols for main parts of the drawings

51. Blower discharge port 52. Rotary flow screen plate

53. Rotary joint 54a.54b. Blanking plate support protrusion

Claims (3)

  1. In a projection display device having an ultra high pressure mercury lamp,
    A rotary joint configured to bisect the discharge port of the bulb cooling blower of the lamp and constitute a central portion;
    And a rotary flow shielding plate coupled to the rotary joint to adjust the discharge direction in the blower by rotating about the rotary joint so as to always be directed toward the gravity direction.
  2. 2. The bulb cooling apparatus of claim 1, further comprising shielding plate support protrusions configured to protrude at the blower discharge port such that the rotary flow shielding plate is inclined by the protruding size without being directed in the direction of gravity.
  3. The apparatus of claim 1, wherein the discharge direction is controlled by the rotary flow blocking plate so that the flow of the blower is biased at the upper end of the bulb.
KR1020030101398A 2003-12-31 2003-12-31 Apparatus for cooling bulb of super high pressure mercury lamp KR20050069370A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020030101398A KR20050069370A (en) 2003-12-31 2003-12-31 Apparatus for cooling bulb of super high pressure mercury lamp

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020030101398A KR20050069370A (en) 2003-12-31 2003-12-31 Apparatus for cooling bulb of super high pressure mercury lamp

Publications (1)

Publication Number Publication Date
KR20050069370A true KR20050069370A (en) 2005-07-05

Family

ID=37259787

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020030101398A KR20050069370A (en) 2003-12-31 2003-12-31 Apparatus for cooling bulb of super high pressure mercury lamp

Country Status (1)

Country Link
KR (1) KR20050069370A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100478777C (en) * 2004-12-24 2009-04-15 三洋电机株式会社 Projection video display device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100478777C (en) * 2004-12-24 2009-04-15 三洋电机株式会社 Projection video display device

Similar Documents

Publication Publication Date Title
US9348201B2 (en) Image projection apparatus
US9671681B2 (en) Image projection apparatus
US8678597B2 (en) Projection type display device
US7008180B2 (en) Axial-flow fan and projector provided with the same
US7237906B2 (en) Projection-type image display apparatus
US6231191B1 (en) Image display mechanism and image display device
US7695160B2 (en) Projector light source and projection type image display device using the same
CN102004382B (en) Projection type image display apparatus
US7618174B2 (en) Vehicle lamp
CN100478777C (en) Projection video display device
US6604829B2 (en) Compact integrated front projection system
US7080910B2 (en) Method and system for a thermal architecture and user adjustable keystone in a display device
JP4238640B2 (en) Illumination device, projection display device, and driving method thereof
US8820938B2 (en) Projector light source having an airflow collision position above a light emission portion
JP5189804B2 (en) Projector device
JP4274053B2 (en) Light source device
JP4582139B2 (en) Projector
US7360906B2 (en) Projection optical system unit and projection-type image display apparatus using the same
US7442161B2 (en) Position adjuster for a device
US7149041B2 (en) Heat dissipation structure for optical engine
JP2007256920A (en) Projector
US7104511B2 (en) Adjustable support for multimedia display device
US7540618B2 (en) Thin projector
JP2005055643A (en) Projection type video display device
US6561655B2 (en) Projector

Legal Events

Date Code Title Description
WITN Withdrawal due to no request for examination