KR20030067325A - Controlling Apparatus of The Projector System and Controlling Method of The Same - Google Patents

Abstract

PURPOSE: An apparatus and method for controlling a projector system are provided to protect little children and users from high-brightness lights emitted from a projector. CONSTITUTION: An apparatus for controlling a projector system includes an LCD lamp(22), a power supply(23), an object sensor(11), and a controller(24). The LCD lamp provides a light source of an LCD. The power supply supplies power required fro the LCD lamp. The object sensor senses an object placed in front of a screen and outputs a sense signal according to the sensed object. The controller controls the power supply to control the quantity of lights of the LCD lamp according to the sense signal of the object sensor.

Description

Controlling Apparatus of The Projector System and Controlling Method of The Same}

TECHNICAL FIELD The present invention relates to a projector system, and more particularly, to a projector system controller and a method for protecting a user from strong light when projecting a projector.

Recently, due to the limitation on the screen size of the existing TV, the development of a projection-type display system is becoming prominent while the development and release of a large screen, ultra-thin display is active.

In such projection display systems, the development and dissemination of projectors using liquid crystal display (LCD) or digital light processing (DLP) has been rapidly increasing, so that not only for presentations in schools, corporations and government offices, but also It is used for home theaters at home.

As shown in FIG. 1, a general projector system projects an image signal input from the outside onto the external screen 10 using the projection type projector 20. In this case, the projector 20 generally outputs high-brightness light through a projection lens (not shown) to display an image signal.

The projector system described above has a problem that, when used indoors, when facing the projector and in front of an external screen, it causes fatal damage to the general user or infants with low visual acuity from the high brightness light of the projector.

Accordingly, an object of the present invention is to provide a projector system control apparatus and method for protecting an infant or a user from high brightness light emitted from a projector.

1 is a view showing the installation of a typical projector system

Figure 2 is a block diagram showing the configuration of a projector system control apparatus according to the present invention

3 is a view illustrating an object detecting unit of an external screen;

4 is a flowchart illustrating a method for controlling a projector system according to the present invention.

5 is a block diagram showing another embodiment of a projector system control apparatus according to the present invention;

6 is a flowchart illustrating another embodiment of a method for controlling a projector system according to the present invention.

Figure 7 is a block diagram showing another embodiment of a projector system control apparatus according to the present invention

8 is a flowchart illustrating still another embodiment of a method for controlling a projector system according to the present invention.

Explanation of symbols for main parts of the drawings

10: external screen 11: object detection unit

12: transmitter

20, 30, 40: Projector 1, 31, 41: Receiver

22: LCD lamp 23: power supply

32, 43: LCD 24, 34, 45: control unit

33, 44: LCD driver 42: memory

Projector system control apparatus according to the present invention for achieving the above object is required in the LCD lamp for providing a light source of the LCD in the LCD projector system for displaying an image signal input from the outside on an external screen, A power supply for supplying power, an object detector for detecting the presence of an object in front of the external screen, and outputting a detection signal according thereto, and supplying the power to adjust the light amount of the LCD lamp according to a detection signal of the object detector It is configured to include a control unit for controlling the unit has its features.

Projector system control apparatus according to the present invention for achieving the above object in the LCD projector system for displaying an image signal input from the outside on an external screen, the LCD driver for driving the LCD, the object presence in front of the external screen And a control unit for controlling the LCD driver to adjust the brightness of the LCD according to the detection signal of the object detection unit, the object detection unit for detecting whether or not and outputs a detection signal accordingly. .

In addition, the projector system control apparatus according to the present invention for achieving the above object in the LCD projector system for displaying an image signal input from the outside on an external screen, the LCD driver for driving the LCD, the front of the external screen An object detecting unit for detecting the presence of an object and outputting a detection signal according thereto, a memory unit for storing preset screen protection pattern data, and screen protection pattern data in the memory unit according to a detection signal of the object detecting unit It is configured to include a control unit for controlling the LCD driving unit to display the read screen protection pattern data to read another feature.

The projector system control method according to the present invention for achieving the above object comprises the steps of: turning on the projector system in the LCD projector system having an external screen and a lamp; Transmitting a detection signal corresponding to an object detected in front of the external screen; When the transmitted detection signal is received, the method includes controlling the screen displayed on the external screen according to the received detection signal.

Hereinafter, a projector system control apparatus and a method thereof according to the present invention will be described with reference to the accompanying drawings.

The projector system of the present invention is to protect the object, that is, the user or the infant, by automatically controlling the screen of the external screen by detecting an object located in front of the external screen, which is composed of an external screen and a projector.

An embodiment of the projector system control apparatus and method thereof according to the present invention will be described below.

First Embodiment

A first embodiment of a projector system control apparatus according to the present invention will be described below.

As shown in FIG. 2, the external screen 10 of the apparatus for controlling a projector system according to the present invention includes: an object detector 11 for detecting an object located in front and outputting a detection signal according to the object; And a transmitter 12 for receiving the detection signal of (11) and transmitting a predetermined signal to the projector 20 according to the input detection signal.

In addition, the projector 20 may include a receiver 21 for receiving a signal transmitted from the transmitter 12 of the external screen 10, an LCD lamp 22 for providing a light source of an LCD (not shown), A power supply 23 for supplying power to the LCD lamp 22 and a controller 24 for controlling the power supply 23 to adjust the amount of light of the LCD lamp 22 according to the received signal. It is configured to include.

Looking at the operation of the projector system control apparatus according to the present invention configured as described above, first detects the object located in front of the external screen 10 through the object detection unit (11).

In this case, the object detecting unit 11 is composed of a plurality of photo diodes as shown in Figure 3 is arranged on the entire lower end of the external screen (10). If there is an object in front of the external screen 10, the light projected by the projector 20 is covered by the object, causing a shadow on the object detecting unit 11, thereby causing a difference in electromotive force between the photodiodes.

In addition, the transmitter 12 is a light emitting device that emits light according to the presence or absence of electromotive force of the object detection unit 11. When the electromotive force occurs in the object detecting unit 11, the transmitter 12 emits light and extinguishes when the electromotive force disappears, thereby continuously transmitting the presence of an object in front of the external screen 10 to the projector 20. do.

The controller 24 of the projector 20 continuously receives the light emission / quenching state of the transmitter 12 through the receiver 21 at a predetermined cycle and outputs a control signal corresponding thereto. Here, the receiver 21 is a light receiving element for detecting light emission of the transmitter 12.

In this case, the control unit 24 controls the supply current of the LCD lamp 22 by outputting a control signal to the power supply unit 23 to adjust the light amount of the LCD lamp 22.

In detail, when the light emitting state of the transmitter 12 is detected, that is, when there is an object in front of the external screen 10, the controller 24 controls the power supply 23 to control the LCD lamp ( Reducing the supply current of 22 reduces the amount of light in the LCD lamp 22.

When the transmitter 12 is extinguished and no signal is received through the receiver 21, the controller 24 controls the power supply 23 to return the light amount of the LCD lamp 22 to its original state. Return

In this case, the amount of light of the LCD lamp 22 reduced according to the control of the controller 24 should have a brightness or short wavelength that is not damaging to a human's vision, and at the same time an object in front of the external screen 10. Since it is necessary to continuously detect the presence or absence of the object, the brightness of the external screen 10 should be such that the presence of an object can be determined.

Referring to the control method of the projector system control apparatus according to the present invention operating as described above are as follows.

As shown in FIG. 4, first, the projector system, that is, the external screen 10 and the projector 20 are turned on (S10). At this time, the external screen 10 and the projector 20 are turned on and at the same time the external screen 10 determines whether there is an object in front (S11).

As a result of the determination (S11), if an object exists in front of the external screen 10, the external screen 10 transmits an object detection signal to the projector 20 (S12).

Subsequently, the projector 20 determines whether the object detection signal is received (S13), and when the object detection signal is received from the external screen 10, reduces the amount of light of the LCD lamp 22 of the projector 20 ( S14). By reducing the amount of light of the LCD lamp 22 to reduce the LCD brightness to reduce the brightness of the light projected from the projector 20 to the external screen 10.

On the other hand, if there is no object in front of the external screen 10, the determination result (S11) the external screen 10 does not transmit the detection signal or stops transmitting the detection signal (S15). The projector 20 detects this and maintains the preset amount of light of the LCD lamp 22 (S16).

While maintaining the on state of the projector system, the object in front of the external screen 10 is continuously detected and the above steps S11 to S16 are repeated.

Therefore, the above-described first embodiment determines whether an object exists in front of the external screen 10 and controls the amount of light of the LCD lamp 22.

Second Embodiment

A second embodiment of the projector system control apparatus according to the present invention will be described below.

As shown in FIG. 5, the external screen 10 of the apparatus for controlling a projector system according to the present invention has the same configuration and operation as the above-described first embodiment, and therefore the same reference numerals are used for the respective configurations. Omit.

In addition, the projector 30 may include a receiver 31 for receiving a signal transmitted from the transmitter 12 of the external screen 10, an LCD 32, and an LCD driver for driving the LCD 32 ( 33), and a controller 34 for controlling the LCD driver 33 to adjust the brightness of the LCD 32 according to the detection signal of the object detector 11.

Looking at the operation of the projector system control apparatus according to the present invention configured as described above, the control unit 34 receives the object detection signal of the external screen 10 through the receiving unit 31. That is, the light emission / extinction state of the transmitter 12 is continuously detected at a predetermined cycle.

The LCD driver 33 outputs a control signal to the LCD driver 33 according to the light emission / quenching state of the transmitter 12 detected through the receiver 31, and the LCD driver 33 outputs the control signal according to the input control signal. The brightness of the LCD 32 is controlled.

The control method of the projector system control apparatus according to the present invention operating as described above is as follows.

As shown in FIG. 6, the screen 10 and the projector 30 are turned on (S20), and it is determined whether an object is detected in front of the screen 10 (S21).

As a result of the determination (S21), when an object is detected in front of the screen 10, the object detection signal corresponding thereto is transmitted to the projector 30 (S22).

The projector 30 determines whether an object detection signal is received from the screen 10 (S23). When the detection signal is received, the projector 30 controls the LCD driver 33 to control the LCD. Decrease the luminance of (32).

On the other hand, if the object is not detected in front of the determination result (S21), the detection signal is not transmitted or the transmission of the detection signal is stopped (S25). The projector 30 recognizes this and maintains the brightness of the LCD 32 at a preset value (S26).

Therefore, in the above-described second embodiment, the brightness of the screen displayed on the screen 10 is determined by directly controlling the brightness of the LCD 32 according to the detection of the object of the screen 10 by continuing the steps S21 to S26. To control.

Third embodiment

A third embodiment of the projector system control apparatus according to the present invention will be described below.

As shown in FIG. 7, the external screen 10 of the projector system control apparatus according to the present invention has the same configuration and operation as the above-described first embodiment, and therefore the same reference numerals are shown for each configuration. Omit.

In addition, the projector 40 may include a receiver 41 for receiving a signal transmitted from the transmitter 12 of the external screen 10, an LCD 43, and an LCD driver for driving the LCD 43 ( 44, the memory unit 42 for storing preset screen protection pattern data, and the screen protection pattern data is read from the memory unit 42 according to a detection signal of the object detecting unit 11. And a controller 45 for controlling the LCD driver 44 to display read screen protection pattern data.

Looking at the operation of the projector system control apparatus according to the present invention configured as described above, the control unit 45 receives the object detection signal of the external screen through the receiving unit 41.

In addition, the pre-stored screen protection pattern data is read from the memory unit 42 according to the detection signal received through the reception unit 41. The LCD driver 44 is controlled to project the read screen protection pattern data onto the screen 10.

The control method of the projector system control apparatus according to the present invention operating as described above is as follows.

As shown in FIG. 8, the screen 10 and the projector 40 are turned on (S30) and it is determined whether an object is detected in front of the screen 10 (S31).

As a result of the determination (S31), when an object is detected in front of the screen 10, an object detection signal corresponding thereto is transmitted to the projector 40 (S32).

The projector 40 determines whether an object detection signal is received from the screen 10 (S33). When the detection signal is received, the projector 40 protects the screen previously stored in the memory unit 42. The pattern data is loaded and the imported screen protection pattern data is projected onto the screen 10 (S34).

On the other hand, the determination result (S31), if the object is not detected in front of the screen 10 does not transmit the detection signal or if the detection signal transmission is stopped (S35). Then, the projector 40 detects this and projects the screen of the screen 10 to its original state (S36).

Therefore, in the above-described third embodiment, when an object is detected in front of the screen 10, the screen protection data is projected onto the screen 10 to protect the object (person) from the projection light of the projector 40. .

Projector system control apparatus and method according to the present invention described above by controlling the brightness of the projector projection screen in response to the detection of an object in front of the external screen or by displaying a protective screen to protect the infant or user from the high brightness light of the projector product There is an effect that can improve the reliability.

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 (7)

In an LCD projector system for displaying an external video signal on an external screen, LCD lamp to provide the light source of the LCD, A power supply unit for supplying power to the LCD lamp; An object detecting unit for detecting the presence of an object in front of the external screen and outputting a detection signal accordingly; And a control unit for controlling the power supply unit to adjust the amount of light of the LCD lamp according to the detection signal of the object detecting unit. In an LCD projector system for displaying an external video signal on an external screen, LCD driver for driving the LCD, An object detecting unit for detecting the presence of an object in front of the external screen and outputting a detection signal accordingly; And a controller for controlling the LCD driving unit to adjust the brightness of the LCD according to the detection signal of the object detecting unit. In an LCD projector system for displaying an external video signal on an external screen, LCD driver for driving the LCD, An object detecting unit for detecting the presence of an object in front of the external screen and outputting a detection signal accordingly; A memory unit for storing preset screen protection pattern data; And a controller for controlling the LCD driver to display the screen protection pattern data read from the memory unit according to the detection signal of the object detecting unit. In an LCD projector system with an external screen and a lamp, Turning on the projector system; Transmitting a detection signal corresponding to an object detected in front of the external screen; And, And when the transmitted detection signal is received, controlling the screen displayed on the external screen according to the received detection signal. The method of claim 4, wherein Controlling the displayed screen according to the detection signal is Controlling the brightness of the lamp to adjust the brightness of the displayed screen. The method of claim 4, wherein Controlling the displayed screen according to the detection signal is And controlling brightness of the LCD to adjust brightness of the displayed screen. The method of claim 4, wherein Controlling the displayed screen according to the detection signal is And outputting and displaying preset screen protection pattern data.