KR20070047146A - Cooling system of projection television - Google Patents

Abstract

The present invention relates to a cooling structure of a projection television, and more particularly, a projector for forming a light source is installed in a lower part of a case forming an external appearance, and a projection in which an image generated by the projector is projected onto an image panel through a mirror. In television; An inlet provided with a suction hole to introduce outside air into a lower side of the case; A blower installed under the case such that the air sucked into the inlet forms an air flow for cooling the image panel; An exhaust part provided with an exhaust hole for exhausting the air moved upwardly through the blower to the case; It is composed of an opening and closing portion for opening or shielding the exhaust portion in response to a signal from the controller.

According to the present invention as described above, during the cooling of the image panel of the projection television, the noise is greatly reduced to provide a quiet driving environment, and the operation reliability is improved by suppressing dust inflow as much as possible.

Projection TV, Inlet, Exhaust, Opening and Closing

Description

Cooling system of projection television

1 is a side cross-sectional view showing a cooling air circulation state of a conventional projection television.

FIG. 2 is a rear view of the projection television shown in FIG. 1; FIG.

3 is a side sectional view showing a cooling air circulation state by the cooling structure of the projection television according to the embodiment of the present invention.

4 is a rear view of the projection television shown in FIG. 3; FIG.

5 is a view showing a state before operation of the opening and closing unit shown in FIG.

6 is a view showing a state after the operation of the opening and closing portion shown in FIG.

<Description of Symbols for Main Parts of Drawings>

10 case 12 rear cover

16 mirror 20 image panel

30: inlet 32: suction hole

34: air filter 40: blower

42: blower fan 44: motor

50: exhaust 52: exhaust hole

60: opening and closing part 62: opening and closing cover

64: pusher 66: drive member

The present invention relates to a cooling structure of a projection television, and more particularly, a filter is provided at the rear of the case so as to easily discharge hot air inside the case to the outside while preventing dust from entering the inside of the case. It relates to a cooling structure of a projection television provided with a portion and provided with an exhaust portion selectively opened on the upper side of the case.

In general, a projection television refers to a display device that reproduces an image by projecting an image onto an image panel by a rear projection method using a projector that scans a light beam containing an image signal.

Fig. 1 is a side sectional view showing the main part of a general projection television.

As shown, a conventional projection television is provided with an image panel 3 on the front surface of the main body case 1, and a rear cover 5 having an inclined shape is formed on the rear surface of the case 1.

In addition, a projector (not shown) for transmitting light is provided below the case 1, and a mirror 7 for reflecting light emitted from the projector is mounted on the rear cover 5. Light reflected through the mirror 7 is projected onto the image panel 3 as an image.

In addition, a blower fan 9 is mounted below the case 1 to create an air flow for cooling the image panel 3.

As described above, the temperature control of the image panel 3 is particularly important in the projection television, especially the micro display panel system, and in general, an air cooling system using a fan is used.

For this purpose, an external circulation method for introducing external air into the case 1 has been proposed, but due to the structure of the projection television, a suction fan is installed toward the front of the case 1, which causes noise, and has a relatively small suction port. Due to the strong suction force, dust on the outside flows into the inside and is stuck to the mirror, which causes a poor image quality and shortens the life of the image panel 3.

In order to solve the problems of the external circulation method as described above, an internal circulation method for blocking external air and circulating the internal air has been proposed.

According to the internal circulation method, since there is no communication with the outside, it is possible to prevent the outside air from flowing into the inside, but a high voltage is required to drive the fan by lowering the cooling efficiency compared to the external circulation. The operation of the fan causes noise.

SUMMARY OF THE INVENTION An object of the present invention for solving the above-mentioned conventional problems is to solve the problem that, in cooling the image panel, noise caused by excessive driving of the fan and deterioration of image quality due to inflow of external dust and shortening of the life of the image panel are shortened. It is to provide a cooling structure of a projection television.

The present invention for achieving the above object is a projection television is provided with a projector to form a light source in the lower portion of the case forming the appearance, the projection television projected on the image panel through the mirror image generated by the projector; An inlet provided with a suction hole to introduce outside air into a lower side of the case; A blower installed under the case such that the air sucked into the inlet forms an air flow for cooling the image panel; An exhaust part provided with an exhaust hole for exhausting the air moved upwardly through the blower to the case; It is composed of an opening and closing portion for opening or shielding the exhaust portion in response to a signal from the controller.

Preferably, the opening and closing portion; An opening and closing cover hinged to an inner upper end of the discharge hole; A wedge-shaped push rod installed under the opening and closing cover; It comprises a drive member for driving the push rod up and down.

Then, a solenoid valve is used as the driving member.

The suction hole is continuously formed in the horizontal direction at the rear side of the case, and an air filter is installed at the suction hole side surface.

The blower is composed of a motor and a blower fan, and sucks air from the upper side of the blower fan and transfers the air downward, and then transfers the air upwardly through the rotation axis direction of the blower fan.

According to the present invention as described above, during the cooling of the image panel of the projection television, the noise is greatly reduced to provide a quiet driving environment, and the operation reliability is improved by suppressing dust inflow as much as possible.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

3 is a side cross-sectional view showing the cooling air circulation state by the cooling structure of the projection television according to the embodiment of the present invention, FIG. 4 is a view showing the projection television shown in FIG. 3 from the rear side, and FIG. 6 is a view showing a state before the operation of the opening and closing portion shown in Figure 6, Figure 6 is a view showing a state after the operation of the opening and closing portion shown in FIG.

In the projection television, the case 10 forming the exterior is located outside, and the rear side of the singer case 10 is called the rear cover 12.

The mirror 16 is inclined inside the rear cover 12, and an image generated by the projector is projected to the image panel 20 on the front through the mirror 16.

The inlet part 30 provided with the suction hole 32 is installed in the lower side of the side of the case 10 to introduce the outside air.

Preferably, the suction hole 32 is formed at the rear side of the rear cover 12 located at the rear side of the case 10, at least two consecutively formed along the horizontal direction.

However, the inlet hole 32 may be formed on any side surface of the case 10 as needed, according to another embodiment of the present invention.

In addition, an air filter 34 is installed on the inner surface of the suction hole 32 to filter foreign substances in the air introduced from the outside.

The blower 40 installed below the case 10 may be provided to the motor 44 and the blower fan 42 so that the air sucked into the inlet portion 30 forms an air flow for cooling the image panel 20. It is configured, and the air is sucked from the upper side of the blowing fan 42 and transferred to the lower side, and then the air is transferred upward through the rotation axis direction of the blowing fan 42.

An exhaust unit 50 having a discharge hole 52 is formed on the side of the case 10 to exhaust the air moved upwardly through the blower 40 to the case 10 to the outside, and the present invention In the embodiment, but is formed on the left and right sides of the case 10, the installation place is increased or decreased as necessary.

The opening / closing part 60 which opens or shields the exhaust part 50 according to a signal from the control part includes an opening / closing cover 62 hinged to an inner upper end of the discharge hole 52, and a lower side of the opening / closing cover 62. It consists of a wedge-shaped push rod 64 to be installed in, and a drive member 66 for driving the push rod 64 up and down.

The drive member 66 may be a member that provides reciprocating motion in one direction, such as a hydraulic cylinder, a pneumatic cylinder, a linear motor driven by electricity, in the embodiment of the present invention is operated by the power supply, the cost of parts Low solenoid valves are used.

The operating state of the cooling structure of the projection television according to the embodiment of the present invention having the above configuration will be described.

Referring to FIGS. 3 to 6, when an operation start signal is input to the projection television, the optical engine is operated to project the image onto the image panel 20 so that the screen is turned on. ) Solenoid valve is operated to move the push rod 64 upward.

The pusher 64 is moved upward to lift the opening and closing cover 62 connected to the white paper at one end of the discharge hole 52 to the upper side to leave the discharge hole 52 in an open state.

In this state, the motor 44 of the blower 40 is driven to rotate the blower fan 42, and the outside air is introduced into the case 10 through the inlet 30 by the rotation of the blower fan 42. Flows into.

As the outside air enters through the suction hole 32 and is filtered by the air filter 34, dust and the like do not flow into the case 10, and the suction hole 32 is formed around the rear side of the case 10. This prevents the product appearance aesthetics from deteriorating.

And, the plurality of suction holes 32 are formed so that the air inflow rate through the suction hole 32 is not sudden, thereby suppressing the inflow of dust and the like as much as possible.

The release sucked through the inlet 30 cools the image panel 20 while being rotated inside the case 10 through the blower 40, and the discharge hole 52 opened by the opening and closing unit 60. Through the inside air goes out.

When the image panel 20 is cooled by the air circulation as described above, and an operation end signal is input to the projection television, the operation of the optical engine is stopped and the screen is turned off.

Then, the solenoid valve constituting the drive member 66 is operated so that the push rod 64 moves downward, and the opening / closing cover 62 also moves downward by its own weight due to the downward movement of the push rod 64. Block 52 to prevent the inflow of dust or foreign matter from the outside.

The embodiments of the present invention as described above are not intended to limit the scope of the present invention, but are presented by way of example, and various embodiments may be applied within the spirit of the present invention.

As described above, according to the cooling structure of the projection television according to the present invention, the suction fan is provided with a plurality of suction holes and two or more discharge holes so that the suction and discharge of air for cooling the image panel can be easily performed, thereby excessively driving the blower fan. This eliminates the need to minimize noise and provides a quiet driving environment.

In addition, when the outside air inflows, the outside air flows in through the plurality of suction holes to lower the air flow rate as much as possible. This provides an effect of improving the operation reliability of the device.

Claims (5)

A projection television for forming a light source at a lower portion of a case forming an appearance, the projection television in which an image generated by the projector is projected onto a picture panel through a mirror; An inlet provided with a suction hole to introduce outside air into a lower side of the case; A blower installed under the case such that the air sucked into the inlet forms an air flow for cooling the image panel; An exhaust part provided with an exhaust hole for exhausting the air moved upwardly through the blower to the case; And an opening and closing portion for opening or shielding the exhaust portion by a signal from the controller. According to claim 1, The opening and closing portion; An opening and closing cover hinged to an inner upper end of the discharge hole; A wedge-shaped push rod installed under the opening and closing cover; And a driving member for driving the pushing rod up and down. 2. The cooling structure of a projection television according to claim 1, wherein a solenoid valve is used as said drive member. 2. The cooling structure of a projection television as defined in claim 1, wherein said suction holes are successively formed in a horizontal direction on the rear side of said case, and an air filter is provided on the side of said suction holes. 2. The projection TV according to claim 1, wherein the blower comprises a motor and a blower fan, and the air is sucked from the upper side of the blower fan and transferred downward, and then the upper portion of the blower fan transports the air upwardly through the rotation axis of the blower fan. Cooling structure.

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