KR100709409B1 - Projection television - Google Patents

Abstract

The present invention relates to a projection television, comprising: a main body comprising a front cabinet on which a screen is installed and a back cover on which a reflector is installed; an optical engine installed inside the main body; And a dust cover for partitioning the inside of the main body to prevent air flow inside the main body, and an air inlet provided in the dust cover to flow air in the main body in which the reflector is installed into the main body in which the optical engine is installed.

Accordingly, the inside of the main body is partitioned with a dust cover, so that clean air inside the main body is supplied to the optical engine only through the air inlet of the dust cover, so that fine dust adheres to a component such as a synthetic system when the optical engine is cooled. It is possible to improve the poor quality of the picture.

Projection Televisions, Optical Engines, Dust Covers, Air Inlets

Description

Projection television

1 is a side sectional view showing the internal structure of a conventional projection television.

2 is a perspective view showing a conventional optical engine.

3 is a perspective view showing the inside of the back cover of the projection television according to the present invention.

4 is an exploded perspective view of the dust cover separated from the back cover of the projection television according to the present invention.

Explanation of symbols on main parts of drawing

10 front cabinet 20 back cover

30: optical engine 40: reflector

50: screen 60: lamp system

70: synthesis system 80: lighting system

100: dust cover 110: air inlet

120: extension duct 130: first filter

140: first intake fan 150: intake port

160: second filter 170: porous member

180: second intake fan

TECHNICAL FIELD The present invention relates to a projection television, and in particular, the air that is introduced to cool the optical engine is not directly introduced from the outside of the projection television, but by cooling the optical engine by using clean air that is present inside the projection television. The present invention relates to a cooling duct of a projection television that prevents foreign matter from entering a synthetic system included in an optical engine.

In general, a projection television can be roughly divided into a CRT projection and an LCD projection depending on the driving element. The CRT projection generates an image signal by three monochrome CRTs (MONO-CHROMA), but in an LCD projection, a signal is generated by an optical engine (light system + color system + projection lens).

The above-mentioned CRT projection and LCD projection differ only in driving elements, but the fundamental principle is almost the same. To date, the spread of CRT projection has been advanced due to price competitiveness, but the market of LCD projection is gradually expanding. . In addition, in order to satisfy a user's desire to purchase, a screen on which an image is projected is being enlarged.

Briefly explaining the structure of such a projection television, Fig. 1 is a side sectional view showing the internal structure of a conventional projection television. Referring to the drawings, the projection television is provided with a front cabinet 10 that forms the front face of the television and a back cover 20 that forms the rear face, and the main body is configured. In addition, the optical engine 30 is installed inside the main body to which the front cabinet 10 and the back cover 20 are coupled. The optical engine 30 generates a light including an image signal by causing strong light to be projected onto an image display unit such as an LCD, and transmits the light including the image signal to the reflector 40 installed in the back cover 20. Will be sent. The light including the image signal generated by the optical engine 30 is refracted by the reflector 40 to the screen 50 installed in the front cabinet 10, and the user views the image reflected on the screen 50. You will watch.

The optical engine 30 used in such a projection television is explained in FIG. 2 is a perspective view showing a conventional optical engine. Referring to the drawings, the optical engine 30 has a lamp system 60 for making light, a synthesis system 70 for implementing an image by the light irradiated from the lamp system 60, and the synthesis system 70 It is composed of an illumination system 80 to enlarge the image made by the reflector mirror 40. The lamp system 60, the synthesis system 70, and the illumination system 80 are installed in a predetermined engine base 31 so that the optical engine 30 is coupled to the front cabinet 10 of the back cover 20. It is installed inside the lower part.

In the projection television having the above-described configuration, the high temperature current is generated while the high voltage current is supplied to generate light in the lamp system 60 to adversely affect other components of the projection television, for example, the lamp If the cooling of the system 60 is not performed smoothly, the liquid crystal between the LCD panels of the synthesis system 70 forming the screen is boiled and LCD boiling occurs in the black screen, or a polarizing plate burns. .

Therefore, in order to cool the heat generated by the optical engine 30, the external air of the projection television is introduced to cool the optical engine 30. In order to cool the optical engine 30, a sirocco fan 34 is installed on one side of the optical engine 30 to suck outside air of the projection television, and the optical engine 30 is provided by the sirocco fan 34. Exhaust fan 32 is provided on the other side of the optical engine 30 to forcibly exhaust the air cooled.

Looking at the cooling of the optical engine 30 in which the sirocco fan 34 and the exhaust fan 32 are installed as described above, when the sirocco fan 34 starts operation for cooling the optical engine 30, the back cover Air outside the main body is taken in by the sirocco fan 34 through the intake port (not shown) formed in the 20, and is supplied to the optical engine 30, the synthesis system 70, the illumination system 80, the lamp system ( 60) to cool. In this way, the air cooled by the optical engine 30 is forcedly exhausted to the outside of the main body through an exhaust port (not shown) formed in the back cover 20 by the exhaust fan.

However, when the optical engine 30 is cooled by air intake outside the main body by the sirocco fan 34 as described above, foreign matters included in the air outside the main body, that is, fine particles such as dust are combined with the sirocco fan ( 34) is taken into the optical engine. This foreign matter is stuck to very sensitive devices such as the LCD panel of the synthesis system 70 or the screen 50 and the reflector 40 installed in the front cabinet 10 and the back cover 20 to generate an image. It will cause a fatal defect.

The present invention is to solve the above problems, and to provide a projection television that cools the optical engine by inhaling air inside the clean body, rather than inhaling air outside the main body to cool the optical engine. For the purpose of

Technical concept of the present invention for achieving the above object, the main body consisting of a front cover and a back cover is provided with a reflector is installed, the screen is installed, the optical engine is installed in the main body consisting of a lamp system, a synthetic system, an illumination system And a dust cover for partitioning the inside of the main body in which the optical engine and the reflector are installed and preventing air flow inside the main body and allowing the air in the main body in which the reflector is installed to flow into the main body in which the optical engine is installed. This is achieved by the cooling duct of the projection television in which the air inlet is included.

Here, it is preferable to further include an extension duct provided in the air inlet for supplying the air of the reflector side partitioned by the dust cover to the optical engine.

In addition, it is preferable that the synthesis system of the optical engine is embedded in the extension duct so that the synthesis system is cooled only by the air supplied through the air inlet of the dust cover.

In addition, it is preferable to further include a first filter installed at the air inlet to filter out fine dust when air on the reflector side installed in the back cover is supplied to the optical engine.

In addition, the air inlet is formed in the back cover so that air outside the main body is introduced to the reflector side installed in the back cover, and preferably further comprises a first intake fan provided in the inlet.

Here, it is preferable to further include a second filter installed in the inlet for filtering foreign matter when the air outside the main body is introduced into the main body.

In addition, it is preferable that the airtightness of the main body is maintained such that air outside the main body flows only through the intake port provided in the back cover.

In addition, the front cabinet and the back cover is interposed between the joint, it is preferable that the front cabinet and the back cover is further comprises a porous member is assembled.

In addition, it is preferable that the intake fan which is installed in the optical engine and forcibly intakes air on the reflector side to the optical engine is further included.

 Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

3 is a perspective view showing the inside of the back cover of the projection television according to the present invention. Referring to the drawings, the screen 50 on which the image is projected is installed on the rear surface of the front cabinet 10. In addition, a main body is formed by providing a back cover 20 in which the optical engine 30 coupled to the rear of the front cabinet 10 is installed.

In addition, a reflector 40 for refracting an image signal generated by the optical engine 30 with the screen 50 installed in the front cabinet 10 is installed in the back cover 20, the back cover 20 of the The reflecting mirror 40 is provided upward, and the optical engine 30 which consists of the lamp system 60, the synthesis system 70, and the illumination system 80 is mounted below. In addition, a dust cover 100 is installed to divide the inside of the main body into a side where the reflector 40 is installed and a side where the optical engine 30 is installed. The dust cover 100 blocks air freely flowing in the main body so that foreign matter does not stick to the reflector 40, and the inside of the main body in which the reflector 40 is installed by the dust cover 100 installed inside the main body. The upper part and the lower part inside the main body in which the optical engine 30 is installed are divided.

Thus, in order to partition the inside of the main body by the dust cover 100, the dust cover 100 is in close contact with the inner circumferential surface of the back cover 20, the optical engine 30 located below the dust cover 100 Only the illumination system 80 is partially exposed, and is installed to illuminate the video signal from the illumination system 80 to the reflector 40 provided above the back cover 20.

In addition, the dust cover 100 is formed with an air inlet 110, the air inlet 110 can flow the air inside the body partitioned by the dust cover 100 only through the air inlet 110. In particular, through the air inlet 110 of the dust cover 100, the air of the reflector 40 side installed above the inside of the body flows to the optical engine 30 side installed below the inside of the main body. .

As described above, the air flow inside the main body is blocked by the dust cover 100 which divides the inside of the main body into the side where the reflector 40 is installed and the side where the optical engine 30 is installed, and is provided only in the dust cover 100. Since the air is guided to the side where the optical engine 30 is installed only through the air inlet 110, the clean air is introduced into the optical engine 30 to cool the optical engine 30.

Here, when the ground of the air on the side where the reflector 40 is installed is explained, the projection television, as described above, reflects the image generated by the optical engine 30 with the reflector and refracts the reflector 40. In order to assemble the projection television using the principle that the image is formed on the screen 50 installed in the front cabinet 10, foreign matters on the reflector 40 and the screen 50 become fatal defects. It is assembled in a dust-free work environment such as a clean-room.

Under such a working environment, the screen 50 is installed in the front cabinet 10, the reflector 40 is installed in the back cover 20, the inside of the main body is partitioned by the dust cover 100, and the optical engine 30 is installed. Therefore, the product is produced in a state in which foreign matter such as fine dust is not included in the main body.

As such, the inside of the main body in which the purified air is present is cooled in the optical engine 30 through the air inlet 110 of the dust cover 100, thereby generating in the optical engine 30. When the heat is cooled, foreign matters do not stick to important parts such as the synthesis system 70 and the like.

Meanwhile, an extension duct 120 may be installed in connection with the air inlet 110 of the dust cover 100 to extend to the optical engine 30, which will be described with reference to FIG. 4. 4 is an exploded perspective view of the dust cover separated from the back cover of the projection television according to the present invention.

Referring to the drawings, the extension duct 120 has a tunnel-like shape, one side of which is slidably coupled to the air inlet, and extends to the optical engine 30 on the other side of the projection bar. In order to repair the inside of the television, it is easy to remove the dust cover 100 or to separate the optical engine 30 from the back cover 20, and the air cleaned through the air inlet 110 is directly connected to the optical engine. By being supplied to 30, cooling of the optical engine 30 is made more rapid.

In addition, the synthesis system 70 of the optical engine 30 may be embedded in the extension duct 120, the light generated from the lamp system 60 is generated in the synthesis system 70, the illumination system 80 The air flow of the synthesis system 70 and the other parts of the optical engine 30 is blocked within the range that the light tube for illuminating the image signal through the reflector 40 is not blocked, and thus the air inlet port of the dust cover 100 is blocked. Clean air supplied through 110 is introduced into the synthesis system 70 and cooled.

In addition, the first filter 130 is installed in the air inlet 110 of the dust cover 100, when the air on the side where the reflector 40 is installed inside the main body is supplied to the optical engine 30 side foreign matters You can also filter. The first filter 130 is installed in a dense mesh-shaped flat plate to filter foreign matter, and is slidably coupled to the air inlet 110 of the dust cover 100.

On the other hand, the back cover 20 may be supplied to the air inlet 110 of the dust cover 100 by sucking the air outside the main body to the side where the reflector 40 is installed, for this purpose, the bag provided with the reflector 40 The cover 20 is provided with a first intake fan 140. The first intake fan 140 has an inlet 150 formed above the main body partitioned by the dust cover 100, and the first intake fan 140 is provided in the inlet 150. The first intake fan 140 is installed at the same speed as the sirocco fan (multi-air blower fan) while the same blower fan is generated to minimize the noise and vibration generated during operation of the first intake fan to watch the projection television It will not interfere.

In addition, a second filter 160, such as the first filter 130 installed in the dust cover 100, is installed at the inlet port 150 of the back cover 20, so that the first intake fan 140 is disposed outside the main body. When the air is sucked into the main body, foreign substances that may be included may be filtered and the cleaner air may be introduced into the main body in which the reflector 40 is installed so that the foreign substances do not stick to important parts such as the reflector 40. Here, the second filter 160 is also detachably installed like the first filter 130 to prevent foreign matter from being deposited in the second filter 160 due to long time use to prevent the flow of air introduced into the main body. By preventing the cooling of the optical engine is performed smoothly.

As described above, in order to supply the purified air to the air inlet 110 of the dust cover 100 by introducing the purified air inside the main body, that is, the outside of the main body to the reflector 40 installed inside the main body. In addition to the inlet 150 and the first intake fan 140 installed in the cover 20, the joints of the front cabinet 10 and the back cover 20 are opened to be filtered by the second filter 160. It should be installed to prevent the inflow of outside air. To this end, the front cabinet 10 and the back cover 20 are assembled to seal the joints of the front cabinet 10 and the back cover 20 so that the main body is kept airtight, or the front cabinet 10 And a porous member 170 such as a sponge is interposed between the joint of the back cover 20 and foreign matter contained in the air outside the main body introduced into the joint of the front cabinet 10 and the back cover 20. It is desirable to be able to filter.

On the other hand, the reflector 40 installed in the back cover 20 in the optical engine 30 so that the clean air on the reflector 40 side installed in the back cover 20 can be smoothly introduced into the optical engine 30. A second intake fan 180 for sucking air on the side is provided. The second intake fan 180 may be installed in the optical engine 30 so as to forcibly intake air from the air inlet 110 formed in the dust cover 100, and further, of the dust cover 100. It is provided in the extension duct 120 installed in association with the air inlet 110, the clean air of the reflector 40 side installed in the back cover 20 smoothly flows into the optical engine 30 of the optical engine 30 Cooling will proceed quickly.

Looking at the operation of the cooling duct of the projection television having the configuration described above, in order to cool the optical engine 30 installed in the main body, the air outside the main body is not directly introduced, but the clean air in the inside of the optical Supply to the engine 30.

To this end, a dust cover 100 is disposed to partition the inside of the main body into a side where the reflector 40 is installed and a side where the optical engine 30 is installed, and the inside of the main body where the reflector 40 is installed in the dust cover 100. Since clean air for cooling is supplied to the optical engine 30 only through the air inlet 110 for supplying the air to the side where the optical engine 30 is installed, the air inside the main body of the air inlet 110. There is no flow anywhere except.

In addition, a first filter 130 is installed at the air inlet 110 of the dust cover 100 so that the air cleaned by filtering the air on the reflector 40 side for cooling the optical engine 30 is supplied. . Accordingly, when the optical engine 30 is cooled, foreign matters such as fine dusts do not stick to components such as the LCD panel of the synthesis system 70 so that an image of a desired quality may be formed on the screen 50.

In addition, a second filter 160 and a first intake fan 140 are installed at the inlet 150 of the back cover 20 to clean the air at the reflector 40 installed inside the main body. The foreign material contained in the air flowing into the reflector 40 in the body is filtered. In addition, the joint portion coupled to the front cabinet 10 and the back cover is sealed or the outside air introduced into the reflector 40 side of the back cover 20 by the porous member 170 is filtered. As for the air on the side where 40 is installed, only clean air exists.

In this way, since the air inside the main body on the side where the reflector 40 is installed cools the heat generated by the optical engine 30, fine dusts do not stick to the synthesis system 70 when the optical engine 30 is cooled. In addition, the cooling of the optical engine 30 is made faster by the extension duct 120 extending to the optical engine 30 in association with the air inlet 110 of the dust cover 100.

According to the projection television according to the present invention, the inside of the main body is partitioned into a dust cover, so that the purified engine inside the main body is supplied to the optical engine only through the air inlet of the dust cover. It is possible to improve the poor image quality that may be caused by fine dust.

In addition, by supplying the air cleaned by the extension duct extending in connection with the air inlet of the dust cover to the optical engine, the rapid cooling of the optical engine is performed.

On the other hand, the present invention is not limited only to the above-described embodiment, but can be modified and modified within the scope not departing from the gist of the present invention, the technical idea that such modifications and variations are also included in the claims Should be seen.

Claims (9)

A main body having a front cover on which a screen is installed and a back cover on which a reflector is installed, and a main body having an inlet for intake of external air above the side surface; An optical engine installed inside the main body and having a lamp system, a synthesis system, and an illumination system; A dust cover that partitions the inside of the main body in which the optical engine and the reflector are installed to suppress air flow inside the main body; And And an air inlet formed at a position spaced apart from the screen and the reflector of the dust cover and allowing air inside the main body in which the reflector is installed to flow into the main body in which the optical engine is installed. The method of claim 1, And an extension duct for guiding the air introduced through the air inlet to be supplied to the mining engine. The method of claim 2, And the synthesis system of the optical engine is cooled only by the air introduced through the air inlet. The method of claim 1, wherein And a first filter installed at the air inlet to filter out fine dust in the air. The method of claim 4, wherein And a first intake fan installed at the intake port to suck air outside the main body. The method of claim 5, And a second filter installed at the intake port to filter foreign matter from the inhaled air. The method of claim 4, wherein And the airtightness of the main body is maintained such that air outside the main body only flows through the intake port. The method of claim 7, wherein The projection television further comprises a porous member interposed between the front cabinet and the back cover is coupled. The method of claim 1, And an intake fan configured to forcibly flow air in the main body in which the reflector is installed, into the main body in which the optical engine is installed.

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