KR20030068724A - Apparatus for Checking State of The Projector and Method for Displaying State of The Same - Google Patents

Abstract

PURPOSE: A device for checking a state of a projector and a method for displaying the same are provided to improve the safety and reliability by monitoring the inner state of the projector and compensate the abnormal state of the projector. CONSTITUTION: A power supply unit(10) supplies power source to a lamp driving unit(20). The lamp driving unit supplies appropriate current to a lamp(21). A current detector(41) is connected to an output of the lamp driving unit for detecting the current supplied to the lamp. The supplied current is converted into a digital type value by an A/D(Analog to Digital) converter(42) to be recognized by a control unit(50). A period measuring unit(44) is connected to an output of a motor(30) driving a cooling fan(31) for measuring one period of the motor and generating predetermined pulses every one period of the motor. A counter(46) counts the number of pulses. The control unit calculates the number of pulsed by the minute to obtain revolution per minute, so that the control unit controls a display unit(60) to display the current state of the lamp and the cooling fan.

Description

Apparatus for Checking State of The Projector and Method for Displaying State of The Same}

TECHNICAL FIELD The present invention relates to a projector, and more particularly, to a projector state checking apparatus and a display method thereof.

In recent years, projectors and projection TVs have been widely used, and development and production of products using liquid crystal displays (LCDs) to increase brightness and clarity are increasing. Since the lamp is the decisive factor that determines the brightness and size of the projector and the projection TV, there is a demand for miniaturization and high brightness of the lamp.

In general, the lamps used in LCD projectors and LCD projection TVs are very high in brightness, and the amount of heat generated is high according to the high brightness. Therefore, for lamp-based products, stable operation as well as lamp life and brightness should be ensured.

In addition, when the internal temperature of the system rises abnormally due to the high heat generation amount of the lamp, an internal circuit may be damaged, and thus a cooling fan for cooling the lamp is necessary. Such a cooling fan must be ensured that its operation must be performed periodically and that the revolutions per minute must be maintained.

However, the above-described conventional projector has a problem in that it is not possible to monitor the internal operating states of the lamp and the cooling fan by itself and thus prevent damage to the system due to abnormal current supplied to the lamp or abnormal operation of the cooling fan.

Accordingly, the present invention has been made to solve the above-mentioned problems of the prior art, an object of the present invention is to provide a projector status check device and a display method for ensuring the product stability by monitoring the internal operating state of the projector at all times. It is.

1 is a block diagram showing an apparatus for checking a projector state according to the present invention.

2 and 3 is a flow chart showing a projector status display method according to the present invention

Figure 4 is a block diagram showing another embodiment of a projector status check apparatus according to the present invention

5 is a flowchart illustrating another embodiment of a method for displaying a projector status according to the present invention.

6 is a view showing an embodiment of a projector status display through a remote control;

Explanation of symbols for main parts of the drawings

10: power supply unit 20: lamp driving unit

21: lamp 30: motor

31: cooling fan 40a: lamp status detection unit

40b: fan state detector 41: current detector

42: A / D converter 43: current compensation unit

44: period measuring unit 45: pulse generator

46: counter 47: rpm compensation unit

50, 73, 85: control unit 60: display unit

70: projector 71: detector

71a: internal temperature detection unit 71b: lamp detection unit

71c: fan detection unit 72, 83: memory unit

74: first communication unit 80: remote control

81: key input unit 82: second communication unit

84: display unit

Projector status check apparatus according to the present invention for achieving the above object is a projector having a lamp and a cooling fan, detecting the current supplied to the lamp to detect the state of the lamp from the detected supply current A lamp state detecting unit for calculating a rotational speed per minute of the cooling fan to detect a state of the cooling fan from the calculated revolutions per minute, and for displaying the detected lamp and cooling fan states. It includes a display unit, a control unit for detecting the state of the lamp and the cooling fan of the projector at predetermined intervals, and controls to display the detected state of the lamp and the cooling fan through the display unit.

In addition, the projector status check apparatus according to the present invention for achieving the above object in the status display method of the projector having a lamp, a cooling fan, a display unit and a remote control, the state of the lamp through the supply current of the lamp Doing; Detecting a state of the cooling fan through revolutions per minute of the cooling fan; And displaying the detected state of the lamp and the cooling fan through the display unit or through the display means of the remote controller according to a user command.

Hereinafter, a projector state checking apparatus and a display method thereof will be described with reference to the accompanying drawings.

1 is a block diagram of a projector status check apparatus according to the present invention. Referring to this, the projector status check apparatus according to the present invention will be described below.

As shown, the projector status check apparatus according to the present invention is a projector having a lamp 21 and a cooling fan 31, the power supply unit 10 for supplying the power required for the lamp 21, the The lamp driver 20 for driving the lamp 21 by receiving power from the power supply unit 10, the motor 30 for rotating the cooling fan, and the supply current of the lamp 21 are detected and detected. The lamp state detecting unit 40a for detecting the state of the lamp 21 from the supplied supply current and the rpm (rpm per minute) of the cooling fan 31 are calculated to calculate the cooling fan (from the calculated revolutions per minute ( Fan status detecting unit 40b for detecting the state of the 31, the display unit 60 for displaying the state of the detected lamp 21 and the cooling fan 31, periodically detects the status of each item of the projector And the detected items through the display unit 60. It is configured to include a control unit 50 for controlling to continuously display the state of.

At this time, the lamp state detection unit 40a converts the current detection unit 41 for detecting the current supplied to the lamp 21 and the detected supply current of the lamp into a form that the control unit 50 can read. It consists of an A / D conversion unit 42, the fan state detection unit 40b is a cycle measuring unit 44 for measuring one period of the cooling fan 31, and the cooling fan 31 A pulse generator 45 for generating a predetermined pulse every one period of time, and a counter 46 for counting the number of pulses per minute from the generated pulses.

Looking at the operation of the projector status check apparatus according to the present invention configured as described above, the lamp driver 20 receives the power from the power supply 10 supplies a suitable current to the lamp (21).

At this time, the current detector 41 is connected to the output terminal of the lamp driver 20 to detect the supply current of the lamp 21, the detected supply current of the lamp 21 is the A / D conversion unit ( The controller 50 converts the value into a digital value recognizable through 42.

In addition, the period measuring unit 44 is connected to an output terminal of the motor 30 driving the cooling fan 31 to measure one period of the motor 30 and through the pulse generator 45. A predetermined pulse is generated every one cycle of the measured motor 30.

The pulse generated from the pulse generator 45 counts the number of pulses through the counter 46, and the controller 50 calculates the number of pulses per minute through the number of pulses through the counter 46. Through the above-described operation, it is possible to find out the revolutions per minute of the cooling fan 31.

The controller 50 receives the supply current value of the lamp 21 and the number of pulses per minute of the motor 30 from the A / D converter 42 and the counter 46 and compares them with a preset reference value. Output a control signal.

In detail, when the supply current of the lamp 21 is greater than or equal to the preset reference value, the controller 50 controls the power supply unit 10 to cut off the supply power of the lamp 21 and is less than or equal to the preset reference value. In this case, the control signal is output to control the current compensator 43 to compensate the supply current of the lamp 21.

Similarly, the controller 50 determines that the cooling fan 31 is not in operation when the counted pulses per minute has a value of zero, and cuts off the power supply of the motor 30 and the pulses per minute. If the number is different from the preset reference value, the control signal is output to the rpm compensator 47 to compensate for the pulse number per minute to be equal to the reference value.

At the same time, the corresponding message is displayed on the display unit 60.

In other words, the controller 50 compares the supply current of the lamp 21 and the revolutions per minute of the cooling fan 31 with the preset values through the display unit 60, respectively, to the lamp 21 and the cooling fan. Display the current status of (31).

Referring to the status display method according to the projector status check apparatus of the present invention operating as described above are as follows.

Hereinafter, each state display method according to the state check of the lamp 21 and the cooling fan 31 of the projector will be described.

As shown in FIG. 2, first, the supply current of the lamp 21 is detected through the current detector 41 (S10), and the controller 50 recognizes the supply current of the detected lamp 21. Analog-to-digital conversion is possible (S11).

Subsequently, it is determined whether the supplied current of the converted lamp 21 is equal to a preset current value (S12).

As a result of the determination (S12), if the supply current of the lamp 21 is equal to the preset current value, the 'normal state' message of the lamp 21 is displayed on the display unit 60 (S13).

On the other hand, if the supply current of the lamp 21 is not the same as the preset current value as the determination result (S12), it is determined whether the supply current of the lamp 21 is equal to or greater than the preset current value (S14).

Subsequently, when the supply current of the lamp 21 is greater than or equal to a predetermined current value, the determination result (S14) cuts off the power of the power supply unit 10 (S15) and the display unit 60 of the lamp 21 Display the 'abnormal state' message (S16).

On the other hand, if the supply current of the lamp 21 is not greater than or equal to a preset current value, that is, less than or equal to the preset current value, the determination result (S14) through the display unit 60 'compensation of the supply current of the lamp 21' A status' message is displayed (S17) and the supply current of the lamp 21 is compensated through the current compensator 43 (S18).

At this time, by feeding back to the step S12 and supply current compensation of the lamp 21 is continued until the supply current of the compensated lamp 21 has the same value as the preset current value.

In a manner similar to that described above, the state of the cooling fan 31 is checked and the state thereof is displayed as shown in FIG.

In detail, first, one period of the motor 30 is measured through the period measuring unit 44 (S20), and the predetermined period is measured every one period of the motor 30 measured through the pulse generator 45. Generate a pulse (S21).

The pulse generated from the pulse generator 45 is counted through the counter 46 (S22) to calculate the number of pulses per minute (S23). That is, one rotation period of the cooling fan 31 is measured through one rotation period of the motor 30, and the rotation speed per minute of the cooling fan 31 is calculated therefrom.

Subsequently, it is determined whether the calculated number of pulses per minute is equal to a preset pulse number (S24). If the number of pulses per minute is the same as a predetermined pulse number (S24), the cooling fan 31 is displayed through the display unit 60. The 'normal state' message is displayed (S25).

On the other hand, if the number of pulses per minute is not the same as the preset pulse number (S24), it is determined whether the number of pulses per minute is 0 (Zero) (S26).

As a result of the determination (S26), when the number of pulses per minute is 0, the power supplied from the power supply unit 10 is cut off (S27) and the 'abnormal state' message of the cooling fan 31 is displayed (S28). Here, when the number of pulses per minute is 0, the cooling fan 31 is not operated, and thus the power is cut off.

Subsequently, if the number of pulses per minute is not zero, the determination result (S26) compensates the number of pulses per minute through the rpm compensator 47 (S29) to compensate for the number of revolutions of the cooling fan 31 and the display unit. The 'compensation state' message of the cooling fan 31 is displayed through 60 (S30).

At this time, the pulse per minute compensation is continued until the number of revolutions per minute of the cooling fan 31 has the same value as the preset pulse number.

Here, the status display of the lamp 21 and the cooling fan 31 may be displayed on the menu window by allocating a menu window in the form of OSD (On Screen Display) to a predetermined area of the display unit 60. An additional display unit (not shown) other than 60 may be added to separately display the states of the lamp 21 and the cooling fan 31 through the added display unit.

Looking at another embodiment of the projector status check apparatus and its display method of the present invention as follows.

As shown in FIG. 4, according to another embodiment of the projector status check apparatus according to the present invention, in the projector, a remote control of the operation of the projector 70 and the projector 70 to detect a state of various preset items is performed in the projector. And a remote controller 80 which reads the state of each detected item from the projector 70 according to a user command and displays the state of each item of the imported projector 70.

In this case, the projector 70 may include a detector 71 for detecting a state of each item such as the internal temperature, a lamp, and a cooling fan, a memory unit 72 for storing the detected state of each item of the projector, A first communication unit 74 for communicating with the remote controller 80 to transmit the detected state of each item to the remote controller 80, and controlling to periodically detect the state of each item, And a controller 73 for controlling the state of the item to be transmitted to the remote controller 80 through the first communication unit 74.

In addition, the controller 80 is a remote control means for remotely controlling the projector 70, a key input unit 81 for inputting an operation command and a status display command of the projector 70, and the projector 70 And a second communication unit 82 for transmitting a control signal according to the input operation command and receiving a status of each item of the projector transmitted from the first communication unit 74, and A memory unit 83 for storing a state, a display unit 84 for displaying the state of each stored projector item, and a state for each item transmitted from the projector 70 according to a user command And a control unit 85 for outputting a corresponding control signal and controlling to display the state of each received item.

Looking at the operation of the projector status check device according to the present invention configured as described above, the projector 70 is a state of various items through the internal temperature sensor 71a, lamp detector 71b and cooling fan detector 71c. Detect it.

At this time, the detailed items of the projector that can be detected through the detection unit 71 may be the internal temperature of the system, the usage time and the number of replacement of the lamp, the number of revolutions per minute and the operability of the fan.

The sensed internal temperature, lamp and cooling fan state are stored in the memory unit 72 under the control of the controller 73.

The projector 70 may be controlled according to an operation command and a 'status display' command input through the key input unit 81 of the remote controller 80, and the user may display the 'status display' command through the key input unit 81. When a key is input, the control unit 85 attempts to communicate with the projector 70 by outputting a control signal through the second communication unit 82 according to the command.

Subsequently, according to the controller 73 of the projector, the state of each projector item stored in the memory unit 72 is transmitted to the remote controller 80 through the first communication unit 74.

In this case, the communication method between the remote controller 80 and the projector 70 may be a communication method using an infrared ray (IR), a communication method using a radio frequency (RF), a communication method using a blue tooth, and the like.

The remote controller 80 receives the state of each item from the projector 70 and writes the state of each item of the projector 70 to the memory unit 83 according to a control signal of the controller 85. Compare with the data of each stored item.

In addition, the controller 85 of the remote controller 80 displays the current state of each item of the projector 70 according to the state of each item detected by the projector 70 with previously stored data. Control to display.

Referring to the status display method according to the projector status check apparatus of the present invention operating as described above are as follows.

First, the projector 70 itself detects the status of each item, such as the internal temperature of the system, the usage time and the number of replacements of the lamp, the revolutions per minute and the operability of the fan, and recalls the state data of each detected item. Stored in the memory unit 72.

Status detection of each item of the projector 70 is periodically performed, and status data of each item stored in the memory unit 72 is also updated at the same time.

Meanwhile, when the 'status display' command is input from the user, the remote controller 80 attempts to communicate with the projector 70 first as shown in FIG. 5 (S40).

The number of communication attempts with the projector 70 is counted (S41) and it is determined whether the counted number of communication attempts has passed a predetermined number of times (S42).

If the number of communication attempts has passed the predetermined number of times (S42), a message “communication error” is displayed on the display unit 84 (S43), and if the number of communication attempts has not passed the preset number of times, It is determined whether there is a data error between the projector 70 and the remote controller 80 (S44).

Subsequently, if there is a data error between the projector 70 and the remote controller 80, the determination result (S44) feeds back to the step S40 to retry communication with the projector 70, and if there is no data error, the projector 70 Receive the status of each item of the detected projector (70) (S45).

The state of each item of the received projector 70 is stored (S46) and it is determined whether data reception from the projector 70 is completed (S47).

As a result of the determination (S47), if data reception from the projector 70 is not completed, data reception is continued and each item state data of the received projector 70 is stored.

On the other hand, when the reception of the data from the projector 70 is completed (S47), the state data of each item of the received projector 70 and previously stored data are compared (S48).

The state of each item of the projector 70 is stored (S49) and the state of each item of the projector 70 is displayed according to the comparison with the previously stored data (S50).

As shown in FIG. 6, the status display of each item of the projector 70 displays the system internal temperature detected by the projector 70, the use time of the lamp, whether the fan is operating normally, and the like.

For example, the 'set internal temperature' displays a temperature value detected in the projector 70 system and compares the detected temperature value with data previously stored in the internal memory unit 83 of the remote controller 80. According to the comparison, it is determined whether the internal temperature of the system is normal and the current internal temperature of the system is displayed.

Therefore, the projector status check apparatus and its display method according to the present invention periodically check the status of the various configuration items of the projector inside the projector and display the status of each checked configuration item on the display area of the projector itself, Display via a separate display element of the remote control means for remote control.

The projector state checking apparatus and display method thereof according to the present invention described above have the following effects.

First, by monitoring the internal condition of the projector itself and compensating for abnormal conditions, it is possible to improve the safety and reliability of the product.

Second, it is possible to improve the status checking convenience of the projector by displaying the checked internal state of the projector and providing it to the user.

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.

Claims (6)

In a projector with a lamp and a cooling fan, A lamp state detector for detecting a current supplied to the lamp and detecting a state of the lamp from the detected supply current; A fan state detector for detecting a state of the cooling fan from the calculated revolutions per minute by calculating the revolutions per minute of the cooling fan; A display unit for displaying the state of the detected lamp and cooling fan; And a controller configured to detect the state of the lamp and the cooling fan of the projector at predetermined cycles and control the display of the detected state of the lamp and the cooling fan through the display unit. The method of claim 1, A current compensator for compensating for the supply current of the lamp when the supply current detected by the lamp state detection unit is equal to or less than a preset reference current; An rpm compensation unit for compensating the revolutions per minute of the cooling fan when the revolutions per minute calculated by the fan state detection unit is not the same as the preset revolutions per minute; A first communication unit for transmitting the states of the lamp and the cooling fan to the outside according to a control signal of the controller; And a remote controller for remotely controlling the operation of the projector and receiving the lamp and cooling fan states transmitted from the first communication unit according to a user command to display the received lamp and cooling fan states of the projector. Projector status check device. The method of claim 2, The remote control A key input unit for inputting an operation command and a status display command of the projector; A second communication unit capable of communicating with the projector and transmitting a control signal according to the input operation command and receiving a lamp and cooling fan status of the projector transmitted through the first communication unit; A memory unit for storing states of the received lamp and cooling fan; A display unit for displaying the states of the stored lamps and cooling fans; And a control unit configured to receive a state of a lamp and a cooling fan transmitted from the projector according to the state display command input, and to control to display the lamp and cooling fan states of the received projector. In the status display method of the projector with a lamp, a cooling fan, a display and a remote control, Sensing the state of the lamp through the supply current of the lamp; Detecting a state of the cooling fan through revolutions per minute of the cooling fan; And, And displaying the detected state of the lamp and the cooling fan through the display unit or through the display means of the remote controller according to a user command. The method of claim 4, wherein And transmitting the detected state of the lamp and the cooling fan to the remote control according to a user command. The method of claim 4, wherein Displaying the status of the detected lamp and cooling fan is Displaying a 'normal state' message of the lamp or the cooling fan when the supply current of the lamp or the revolutions per minute of the cooling fan is equal to each preset value; If the supply current of the lamp is greater than or equal to a preset value or the revolutions per minute of the cooling fan is zero, turning off the projector main power and displaying an 'abnormal state' message of the lamp or the cooling fan; When the supply current of the lamp is less than or equal to a preset value or the revolutions per minute of the cooling fan is not the same as the preset value, the 'compensation state' message is displayed while compensating for the supply current of the lamp or the revolutions per minute of the cooling fan. Projector status display method characterized in that consisting of steps.