KR20050077944A - Opening and closing structure of suction/exhaust port of projector and the methode - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake / exhaust structure of a projector, and more particularly to an opening and closing structure of an intake / exhaust port of a projector for opening and closing an intake / exhaust port.

In order to achieve the object of the present invention, the inlet / outlet opening / closing structure of the projector includes: a projector for forming a cooling passage through the inlet / outlet, including: a blocking plate for opening and closing the inlet / outlet; Conveying means for conveying the blocking plate; A motor driver for operating the conveying means; A detector for checking an open / closed state of the blocking plate; And a control unit for controlling the motor driving unit through the signal of the sensing unit.

According to the present invention, the intake / exhaust air is closed by the blocking plate while the cooling fan is not driven, such as in a stand-by or power-off, thereby preventing dust from entering the set through the intake / exhaust air. This prevents problems such as screen stains caused by dust and improves quality.

Description

Opening and closing structure of suction / exhaust port of projector and the methode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake / exhaust structure of a projector, and more particularly to an opening and closing structure of an intake / exhaust port of a projector for opening and closing an intake / exhaust port.

In general, a projector is a product in which a small image of about 0.5 to 1.3 inches made by an optical engine is enlarged through a lens, and the enlarged image is reflected on a screen.

At this time, the image enlarged on the screen implements a large screen of 100 inches or more. If fine dust floating in the air is buried in the optical engine, the dust is enlarged on the screen to create a screen stain or spot.

In order to prevent such a problem, a method of fundamentally blocking the inflow of air into the set may be conceived. However, the optical engine of the projector must use an external light source for driving.

This external light source is to use a 100 ~ 250W lamp, which is accompanied by the generation of very intense light and high temperature at the same time.

At this time, if the generated high temperature stays in the set continuously, it affects the optical engine parts having the characteristic that is very vulnerable to heat, thereby causing a defect.

Therefore, the apparatus such as the optical engine cannot be left in an enclosed space, but rather it must be forced to convection with a cooling fan (FAN) to form a flow path and allow external air to flow well through the flow path.

At this time, the flow path is composed of an intake port through which external air is introduced and an exhaust port through which the cooled air exits to the outside. It will not install.

This is because the exhaust port is a place where air escapes from the inside to the outside, and there is a small probability that external dust is introduced, but rather, the amount of air is greatly reduced when the dust filter is placed, thereby greatly reducing the cooling performance.

However, such a conventional intake / exhaust structure does not form a flow path designed for cooling because the cooling fan does not operate, that is, the cooling fan does not operate at stand-by or when the power is off. On the contrary, there is a problem that outside air is introduced into the set through the exhaust port, and dust and the like are buried in the optical engine.

Therefore, there is a need for a method for preventing dust from entering through the intake / exhaust vents during a stand-by or power-off.

The present invention has been proposed to solve the above problems, and an object of the present invention is to close the intake / exhaust holes by the blocking plate while the cooling fan (FAN) is not driven, such as during standby or power off. Thus, the purpose is to block the dust from entering the set through the intake / exhaust.

The intake / exhaust opening and closing structure of the projector according to the present invention for achieving the above object, in the projector to form a cooling passage through the intake / exhaust opening, the intake / exhaust opening is formed in a structure capable of opening and closing the opening, When the cooling fan is driven for cooling, the intake / exhaust opening is opened to form a flow path, while the intake / exhaust opening is closed to close the dust while the intake / exhaust opening is not driven.

In order to achieve the object of the present invention, the inlet / outlet opening / closing structure of the projector includes: a projector for forming a cooling passage through the inlet / outlet, including: a blocking plate for opening and closing the inlet / outlet; Conveying means for conveying the blocking plate; A motor driver for operating the conveying means; A detector for checking an open / closed state of the blocking plate; And a control unit for controlling the motor driving unit through the signal of the sensing unit.

Here, the intake / exhaust port is characterized in that the guide groove for inducing the movement of the blocking plate is formed.

Here, the conveying means is characterized in that the power transmission device.

Here, the power transmission device is characterized in that the drive gear and the rack gear that is engaged with the drive gear.

Here, the power transmission device is characterized in that the timing pulley and the timing belt.

Here, the detection unit is characterized in that the first switch and the second switch is turned on / off as the blocking plate is transferred to the left and right.

Here, the first switch is in contact with one side of the blocking plate in a state where the intake / exhaust port is completely opened by the blocking plate, and the on / off state of the motor driving unit is stopped.

Here, the second switch is in contact with the other side of the blocking plate in a state where the intake / exhaust port is completely closed by the blocking plate, and the on-off state of the motor driving unit is stopped.

Here, the detection unit is characterized in that it comprises a sensor for measuring the distance to the left and right blocking plate is transferred to the on / off signal input.

According to an aspect of the present invention, there is provided a method for opening and closing an intake / exhaust vent of a projector, including: (a) checking an opening / closing state of an intake / exhaust vent after plugging in; (b) if the intake / exhaust ports are not completely closed, driving the motor driving unit to completely close the intake / exhaust ports, and waiting for a power-on signal to be input in a stand-by state; (c) driving the motor driving unit to open the intake / exhaust vent when the power on signal is input, and driving the cooling fan for an initial set cooling time to cool it; (d) after securing initial cooling, turning on the lamp and displaying a screen; (e) turning off the lamp and the screen by inputting a power-off signal after the use of the projector is finished; (f) cooling the inside of the set by continuously operating the cooling fan even after the lamp and the screen are turned off; (g) turning off the cooling fan after operating the fan sufficiently for the later setting cooling time; (h) the cooling fan is turned off and the motor driving part is driven to close the intake / exhaust vents; and (i) waiting for the intake / exhaust to be closed and to receive a power-on signal in a stand-by state.

Here, the step (b) is characterized in that it further comprises the step of turning on the warning message flag (on) to let the user know that additional cooling time (Cooling Time) is required for stable operation of the projector. .

Here, the step (c) is characterized in that it further comprises the step of checking the cooling fan drive time from time to time and compare with the initial set cooling time, and driving the cooling fan until sufficient cooling is achieved.

Here, the step (d) is characterized in that it further comprises the step of outputting a notification message to inform the user, if the state (on) by checking the warning message flag after the lamp is turned on.

Here, the step (f) is characterized in that it further comprises the step of checking the cooling fan drive time from time to time and compare with the later set cooling time, and drive the cooling fan until sufficient cooling is achieved.

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

1 is a schematic view showing an opening / closing structure of an intake / exhaust vent of a projector according to an exemplary embodiment of the present invention.

As shown in the figure, the intake / exhaust opening / closing structure of the projector according to the present invention includes a blocking plate 30 for opening and closing the intake / exhaust opening 10 of the projector and a transfer plate for transferring the blocking plate 30. A transfer unit 40, a motor drive unit 50 for operating the transfer unit 40, a detection unit 60 for checking the open / closed state of the blocking plate 30, and the detection unit 60 Configure a control unit (not shown) for controlling the motor driving unit 50 through the signal of.

The intake / exhaust port 10 is formed with a guide groove 11 for inducing the movement of the blocking plate 30.

In addition, the transfer means 40 is composed of a power transmission device. In FIG. 1, as the power transmission device, a drive gear 41 and a rack gear 43 meshed with the drive gear 41 are linearly exemplified. In addition, a timing pulley and a timing belt may be used.

In addition, the sensing unit 60 includes a first switch 61 and a second switch 63 that are turned on / off as the blocking plate 30 is moved left and right.

At this time, the first switch 61 is in contact with one side of the blocking plate 30 in a state in which the suction / exhaust port 10 is completely opened by the blocking plate 30, and the motor driving unit 50 is turned on. It stops the operation of.

In addition, the second switch 63 is in a state in which the second switch 63 is in contact with the other side of the blocking plate 30 in a state where the inlet / outlet 10 is completely closed by the blocking plate 30, and the motor driving unit 50 is turned on. Stop the operation.

In the present invention as described above, the drive gear 41 is formed on the shaft of the motor driving unit 50, and the rack gear 43 is formed on the blocking plate 30 to be engaged with the motor driving unit 50, so that the motor driving unit 50 is left and right. As it is conveyed, the intake / exhaust port 10 is opened or closed.

At this time, the transfer direction of the blocking plate 30, that is, the rotation direction of the motor can be controlled through the polarity of the power supplied to the motor.

In addition, as the first and second switches 61 and 63 are provided at both sides of the blocking plate 30, whether the intake / exhaust port 10 is completely closed by the blocking plate 30 (second switch-on state. ), Or whether it is fully open (first switch on).

The first and second switches 61 and 63 may be used to obtain current open / close state of the intake / exhaust port 10 and time information for driving the motor driving unit.

In addition, the detection unit 60 may use a detection sensor for measuring the distance from the left and right blocking plate 30 is transferred to the on / off signal.

The overall operation of the present invention having the above configuration will be described with reference to the accompanying drawings.

2A to 2B are flowcharts illustrating a method of opening and closing an intake / exhaust vent of a projector according to an exemplary embodiment of the present invention, and FIG. 2A illustrates an opening / closing action of the intake / exhaust vent when the power is on. It shows the opening / closing action of the intake / exhaust port at the time of off.

Referring to FIG. 2A, when a plug is inserted to operate a power source to use a projector, the projector first checks the opening / closing state of the intake / exhaust port 10 (s111).

At this time, if the user drives the cooling fan 20 to cool enough by the later setting cooling time (Cooling Time) and turns off the power, the intake / exhaust port 10 is completely closed by the blocking plate 30. That is, the second switch 63 will be in an on state.

However, if the user turns off the power without sufficient cooling for a later setting cooling time, the projector may be in a state in which the intake / exhaust port 10 is not completely closed and the second switch 63 is turned off. Will be.

In this case, to warn the user that an additional cooling time is required for stable operation of the projector, the user needs to turn on the caution message flag, and operate the motor driving unit 50 to operate the intake / exhaust system 10. ) To be completely closed (s120, s121).

Subsequently, the apparatus waits until a power on signal is input in a standby state (s112).

Thereafter, when the user inputs a power on (power on) signal, the motor driving unit 50 is operated to open the intake / exhaust port 10 (s113 and s114).

Subsequently, the cooling fan 20 is driven for an initial set cooling time to secure initial cooling conditions (S115).

At this time, in order to ensure sufficient cooling, the cooling fan 20 driving time is checked from time to time to compare with the initial setting cooling time, and to drive the cooling fan 20 until sufficient cooling is achieved (s116, s122). .

Then, the lamp and the set are turned on, and before the display of the screen, the check message flag is turned on (s117, s118).

If it is checked, if the warning message flag is on, a warning message is output to the user and notified. After the warning message is output, the warning message flag is initialized and the screen is displayed (s123 and s119).

In addition, the opening / closing action of the intake / exhaust vent when the power is turned off through FIG. 2B will be described below.

When the projector is used and the power is turned off, the projector turns off the lamp and the screen once (s211).

However, since a lot of heat still remains inside the set to operate the cooling fan 20 to remove the remaining heat (s212).

At this time, in order to ensure sufficient cooling, the cooling fan 20 driving time is checked from time to time to compare with the later set cooling time, and to drive the cooling fan 20 until sufficient cooling (s213, s217) .

It is advisable for the user to wait for this time before unplugging the unit for stable operation of the set.

Subsequently, if the cooling fan 20 has been sufficiently operated, the cooling fan 20 is turned off (s214), and the motor drive unit is driven to completely close the intake / exhaust port 10 with the blocking plate 30, thereby introducing dust. Block and wait in standby mode until the next power is on (s215, s216).

According to the present invention as described above, the intake / exhaust port 10 of the projector is formed in a structure that can be opened and closed by the blocking plate 30, the intake / exhaust port 10 when driving the cooling fan 20 for cooling the set. ) To form a flow path, and while the cooling fan 20 is not driven, that is, during stand-by, the intake / exhaust port 10 is closed to make it airtight to block the inflow of dust, thereby preventing the screen from being dusted. This can prevent staining problems.

According to the present invention, the intake / exhaust air is closed by the blocking plate while the cooling fan is not driven, such as in a stand-by or power-off, thereby preventing dust from entering the set through the intake / exhaust air. This prevents problems such as screen stains caused by dust and improves quality.

1 is a schematic view showing an opening / closing opening and closing structure of a projector according to one embodiment of the present invention;

2a to 2b is a flow chart illustrating a method for opening and closing the intake / exhaust vent of the projector according to an embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

10: intake / exhaust vent 11: guide groove

20: cooling fan 30: blocking plate

40: transfer means 41: drive gear

43: rack gear 50: motor drive unit

60: detector 61: first switch

63: second switch

Claims (15)

In the projector to form a cooling passage through the intake / exhaust, The intake / exhaust vent is formed in a structure that can be opened and closed, and when the cooling fan is driven to cool the set, the intake / exhaust vent is opened to form a flow path, while the intake / exhaust vent is closed by closing the intake / exhaust vent. Intake / exhaust opening and closing structure of the projector, characterized by blocking the inflow of dust. In the projector to form a cooling passage through the intake / exhaust, Block plate for opening and closing the intake / exhaust vents; Conveying means for conveying the blocking plate; A motor driver for operating the conveying means; A detector for checking an open / closed state of the blocking plate; A controller for controlling the motor driver through a signal of the detector; Intake / exhaust opening and closing structure of the projector, characterized in that comprises a. The method of claim 2, The intake / exhaust opening and closing structure of the projector, characterized in that the guide groove is formed to guide the movement of the blocking plate. The method of claim 2, The transfer means is inlet / outlet opening and closing structure of the projector, characterized in that the power transmission device. The method of claim 4, wherein The power transmission device may include a drive gear and a rack gear that is engaged with the drive gear. The method of claim 4, wherein The power transmission device opening and closing structure of the projector, characterized in that it comprises a timing pulley and a timing belt. The method of claim 2, The detection unit is inlet / outlet opening and closing structure of the projector, characterized in that consisting of the first switch and the second switch on / off as the blocking plate is transferred to the left and right. The method of claim 7, wherein The first switch is in contact with one side of the blocking plate in a state where the intake / exhaust port is completely opened by the blocking plate, and the on / off structure of the projector is characterized in that the operation of the motor driving unit is stopped. . The method of claim 7, wherein The second switch is in contact with the other side of the blocking plate in a state where the intake / exhaust port is completely closed by the blocking plate, and the on / off structure of the projector is characterized in that the operation of the motor driving unit is stopped. . The method of claim 2, The sensing unit inlet / outlet opening / closing structure of a projector, characterized in that it comprises a sensor for measuring the distance to the left and right blocking plate is transferred to the on / off signal input. (a) checking the opening / closing state of the intake / exhaust vent after plugging in; (b) if the intake / exhaust ports are not completely closed, driving the motor driving unit to completely close the intake / exhaust ports, and waiting for a power-on signal to be input in a stand-by state; (c) driving the motor driving unit to open the intake / exhaust vent when the power on signal is input, and driving the cooling fan for an initial set cooling time to cool it; (d) after securing initial cooling, turning on the lamp and displaying a screen; (e) turning off the lamp and the screen by inputting a power-off signal after the use of the projector is finished; (f) cooling the inside of the set by continuously operating the cooling fan even after the lamp and the screen are turned off; (g) turning off the cooling fan after operating the fan sufficiently for the later setting cooling time; (h) the cooling fan is turned off and the motor driving part is driven to close the intake / exhaust vents; and (i) waiting until the intake / exhaust is closed and a power-on signal is input in a standby state. The method of claim 11, The step (b) further includes the step of turning on the attention message flag to let the user know that additional cooling time is required for stable operation of the projector. How to open / close intake / exhaust vents. The method of claim 11, Step (c) checks the cooling fan drive time from time to time and compare with the initial set cooling time, and further comprising the step of driving the cooling fan until sufficient cooling is achieved, the intake / exhaust opening and closing method of the projector. The method of claim 11, Wherein step (d) after the lamp is turned on, by checking the warning message flag (on), if the state (on), the intake / exhaust opening and closing method of the projector further comprising the step of outputting a notification message to inform the user. The method of claim 11, Step (f) checks the cooling fan driving time from time to time and compare with the later set cooling time, and further comprising the step of driving the cooling fan until sufficient cooling is achieved, the intake / exhaust opening and closing method of the projector.