WO2017091036A1

WO2017091036A1 - Monitor or beam projector for cutting power and standby power

Info

Publication number: WO2017091036A1
Application number: PCT/KR2016/013705
Authority: WO
Inventors: 김창호
Original assignee: 김창호
Priority date: 2015-11-26
Filing date: 2016-11-25
Publication date: 2017-06-01
Also published as: KR20180078261A

Abstract

A computer monitor apparatus (1) or a beam projector (2) having a standby power cutoff function is provided. The monitor device includes a control unit (5) having a microcontroller for controlling power supply. When a VGA cable is used, the control unit (5) is configured such that power (+5 V) supplied from a computer via a VGA cable is input to the microcontroller of the control unit (5) , and the control unit (5) controls a power supply/cutoff unit (30) to supply power to the monitor, to check synchronization signals (V-sync and H-sync) supplied from the computer, and to check, determine and control various signals and power supply status. The control unit (5) is also configured such that power (+5 V) supplied from a computer via an HDMI cable is applied to the microcontroller of the control unit (5) when the HDMI cable is used, and the control unit (5) controls the power supply/cutoff unit (30) to supply power to the monitor, and includes a TMDS converter for receiving a TDMS clock signal supplied from a computer and converting the received TDMS clock signal to an input level of the microcontroller to thereby check the TMDS clock signal input to the microcontroller, and to check, determine, and control various signals and power supply states.

Description

Monitor or beam projector cuts power savings and standby power

The present invention relates to a technology for blocking power saving and standby power, such as a computer peripheral device such as a monitor or a beam projector (hereinafter collectively referred to as "monitor").

More specifically, the present invention is to prevent the unnecessary power consumption by shutting off the power of the monitor when the computer enters the power saving mode because the user does not use the computer for a predetermined time period set in the computer having the power saving mode setting function In addition, when the user 'off' the power of the computer, it automatically cuts off the power of the monitor connected to the computer, which cuts off the power saving and standby power, which can completely cut off the power consumption caused by the standby power. A monitor or beam projector and a power control method thereof.

In recent years, as the use of computers and their peripheral devices in the home or work environment rapidly increases, the demand for electric energy consumption consumed is increasing. Various types of conventional technologies have been developed for the reduction of electric energy consumption, that is, power saving. As a technology for reducing power of a typical conventional computer peripheral device, a separate power saving outlet is provided or provided outside the device. There are things to do.

Korean Patent No. 10-1470804 (Publication No. 10-2014-0101524, Applicant No. 10-2014-0101524 of the applicant, as a prior art regarding the standby power blocking function of a computer or an electronic device, an outlet device having a standby power blocking function of a computer or an electronic product) And a control method thereof.

However, these outlets are generally equipped with a current sensor for checking the operation state of the computer. When the user 'off' the computer's power switch, the current value is read by the current sensor and the power is 'off'. If the current value of, the power supply is configured to cut off standby power by shutting off the peripheral device side. However, this conventional solution is not only inconvenient to install a separate outlet on the outside of the device, but also because the standby power value actually consumed is different for each computer that each user prefers to use, Every time a device is installed, it is a cumbersome process to accurately set the standby power value to be cut off. Moreover, the number of insertion openings of the associated outlet may be unnecessarily large, which makes the outlet price relatively expensive and occupies more installation space. In addition, more importantly, even when the computer is in a power saving mode, the peripheral devices are not actually powered off, thereby preventing the unnecessary waste of power completely.

Therefore, the present invention has been made to improve the above-mentioned problems in the prior art, and the means for detecting the power saving mode and the power off of the computer, and the power is cut off without the addition of a separate outlet to the monitor or the beam projector of the computer. A monitor is provided inside the monitor or beam projector that automatically shuts off the monitor or beam projector when the computer is in power saving mode and / or when the computer is powered off, thereby preventing unnecessary power wasted from peripheral devices. The aim is to provide a beam projector.

According to an exemplary embodiment of the present invention, a computer monitor device or a beam projector having a standby power blocking function is provided, and the monitor device (hereinafter, including the beam projector) includes a microcontroller for controlling a power supply. Including a control having a,

The control unit is configured to apply power (+ 5V) supplied from a computer via a VGA cable to a microcontroller of the control unit when a VGA (Video Graphics Array) cable is used, and when the power supply (+ 5V) is supplied. Check the synchronization signals (V-sync and H-sync) supplied from the computer, and supply the power to the monitor by controlling the power supply / cut-off unit in the control unit, and also check the various signals and power supply status (check), Determine and control.

The control unit is further configured to supply power (+ 5V) supplied from the computer to the HDMI cable when the HDMI (High Definition Multimedia Interface) cable is used, and when the power supply (+ 5V) is supplied to the microcontroller. Means for receiving a transition minimized differential signaling (TMDS) signal from a computer and converting the signal to an input level of the microcontroller to check a TMDS clock signal input to the microcontroller, and controlling and controlling a power supply / disconnector from the controller It is configured to supply power to, and to check, determine, and control various signals and power supply states.

The monitor also includes a power supply / blocking unit for controlling supply / disconnection of AC power, and the power supply / blocking unit is configurable as a conventional relay or triac (not shown), and the like. Power on / off under control.

In addition, the monitor includes a means for detecting the on / off of the computer, the means, the voltage of the resistor (R1) and the resistor (R2) supplied from the computer via the VGA connector or HDMI connector And the other end of the resistors R1 and R2 in common and connected to the input I1 of the microcontroller of the controller.

In addition, the monitor further comprises a power supply means, the power supply means, the computer is turned off, the function to prevent the power supply of the monitor is cut off immediately after the voltage (+ 5V) supplied from the computer is cut off However, for example, in order to prevent the power supply from being immediately cut off when the temperature of the beam project is high, the fan is controlled to supply power until the temperature is sufficiently cooled, and then the AC power voltage can be cut off. do. In addition, the power supply unit 10 is configured to cut off all the power after the event processing of the monitor by continuously applying the power supply voltage VR to the microcontroller through the diode D3.

Furthermore, the monitor includes a current backflow prevention means, wherein the current backflow prevention means is provided with power supplied via a VGA cable or an HDMI cable from a computer to a monitor device via a diode D1 or a diode D2, respectively. The power supply is configured to be input to the microcontroller via a connection point A commonly connected to the cathodes of the diodes. This configuration enables the operation of the current backflow prevention means for preventing the backflow of the current by the collision between the power sources.

발명의 효과Effects of the Invention

The present invention prevents unnecessary waste of power by automatically shutting off the standby power of a monitor or beam projector, which is a peripheral device connected to a computer, and automatically shutting off the power supply of the monitor when the computer power saving mode is executed. Therefore, by reducing the electric energy used in computer peripherals, the electricity bill is reduced, and as a result, the national power generation is reduced, and the emission of carbon dioxide (CO2) generated during the power generation is prevented to prevent environmental pollution. It will also provide an effect.

1 is a diagram illustrating a configuration of a monitor according to a first embodiment of the present invention.

2 is a diagram illustrating a configuration of a beam projector according to a second embodiment of the present invention.

3 is a diagram illustrating a circuit configuration to block power saving and standby power according to an embodiment of the present invention.

In the drawings, like reference numerals denote like components or devices.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a monitor device or a beam projector for blocking power saving and standby power according to the present invention will be described in detail.

1 is a diagram illustrating a configuration of a monitor apparatus according to an embodiment of the present invention. With reference to FIG. 1, the structure of the monitor apparatus 1 of this invention and its power control method are demonstrated. First, the configuration of the monitor device 1, the monitor 1 is connected to a computer, VGA (Video Graphics) for inputting + 5V voltage, synchronization signals (V-sync and H-sync) and video signals Array (3) connector (3) and HDMI (High Definition Multimedia Interface) connector (4) connected to the computer and inputs a + 5V voltage, Transition Minimized Differential Signaling (TMDS) clock signal and video signal. The monitor device 1 also includes a display for outputting an image input from the computer via the VGA connector 3 or the HDMI connector 4 and a display driver for driving the display to provide an image signal. It is configured by.

The monitor device 1 includes a controller 5 for processing and controlling image signals by receiving various signals from a computer connected thereto, wherein the controller 5 is a + 5V power supply and a synchronization signal (V-sync). And a microcontroller configured to receive H-sync) and RGB video signals, and a TMDS clock signal through the HDMI connector cannot be recognized by the microcontroller as it is, and thus a TMDS for converting the signal into an input level recognizable by the microcontroller. It includes a converter. The TMDS converter converts a level of a signal input through an HDMI connector into a signal suitable for processing by a microcontroller (for example, can be implemented by a conventional microcomputer) and provides the microcontroller.

The monitor device 1 also has a function for adjusting the supply / blocking of the power supply unit 10 and AC power supply for supplying the power necessary for the operation of each part including the control unit 5, the display and the display driver. It includes a power supply / blocking unit 30 to perform.

In the case of using the VGA cable, the controller 5 is supplied with a power supply voltage (+ 5V) supplied from a computer via a VGA cable to the microcontroller of the controller 5 so that the controller 5 supplies the power. It is configured to supply power to the monitor by controlling the supply / disconnect section 30 to an active (active) state. The power supply / blocking unit 30 is a power switching function for controlling the AC power supply to be activated or deactivated according to the control from the control unit 5, using a conventional relay or triac, or the like. Can be configured.

3 is a diagram illustrating a circuit configuration for cutting off power saving and standby power configured in the monitor apparatus according to an exemplary embodiment. Referring to FIG. 3, a + 5V voltage is input from the computer through the VGA connector or the HDMI connector to the anode side of the diodes D1 and D1, respectively, and the cathode side of the diodes is connected to the control unit 5 in VR. It is configured to be input into a voltage. The AC power supply through the power supply / blocking unit 30 is supplied as the operating power required for the monitor 1 through the power supply unit 10, and thus the operating voltage is supplied to the microcontroller of the control unit 5. At this time, in order to prevent reverse current from flowing between the power supplies, each cathode of the diodes D1, D2, and D3 is commonly connected to the connection point A as shown in FIG. This is connected to the control section 5.

In addition, as a means for determining whether the power supply of the computer is turned on, one end of the resistor (R1, R2) is configured to be connected to + 5V, the other end to the input (I1) of the microcontroller of the control unit 5 do. Accordingly, when + 5V is input from the computer through the VGA / HDMI connectors, the microcontroller of the controller 5 applies and connects a predetermined control signal to the power supply / disconnector 30 through the output terminal O1. By activating the control, the power supply unit 10 supplies power to the monitor 1. The power supply / blocking unit 30 may be configured as a relay (not shown) or a triac (not shown) having a conventional commercially obtainable control gate, but is not limited thereto.

When the power supply / blocking unit 30 is controlled in an active state and the AC power supply voltage is supplied to the power supply unit 10, the power supply unit 10 is configured to generate and supply power required for the monitor 1. When the operating power is supplied to the power supply unit 10, the control unit 5 including the microcontroller and the TMDS converter to display the image on the display by driving the display according to the signal received from the computer in order to control all of the monitors. do.

FIG. 2 shows an embodiment of the configuration in which the present invention is applied to the beam projector 2, except that the monitor 1 is replaced with the beam projector 2 in the configuration in FIG. It is substantially the same as the configuration. Referring to FIG. 2, a lamp, a display, a lens, and a reflector (not shown) for illuminating an image on the screen are provided to illuminate the image on the screen. In addition, a fan is provided as a means for cooling the generation of heat in the lamp during operation of the beam projector, the operation of which is controlled by the controller 5.

In addition, if the power of the beam projector is turned off immediately when the computer is turned off, the peripheral device may be deteriorated due to the high temperature heat generated from the lamp, which may reduce the life of the device. Thus, a temperature sensor for sensing the temperature is arranged at an appropriate position adjacent to the beam projector 2 to measure the ambient temperature and to provide the measured temperature value to the controller 5.

Therefore, the operation principle of the monitor (beam projector) and the method of controlling the same will be described in detail below with reference to FIGS. 1 to 3.

VGA 커넥터 사용 시 모니터 전원 공급 제어Control monitor power supply when using a VGA connector

First, a description will be given of power supply control when a VGA signal is input from a computer. When the user turns on the computer while the monitor (1) is turned off, the RGB video signal, + 5V, and sync signals (V-sync and H-sync) are output from the computer through the VGA cable and the VGA connector. Is entered. At this time, the voltage VR is supplied to the microcontroller of the controller 5 through the diode D1. When the voltage VR is supplied to the microcontroller, the microcontroller supplies power to the monitor 1. Controlling the power supply / disconnection unit 30 to the active state starts supplying AC power to the monitor 1.

On the other hand, when power is supplied to the power supply unit 10, the power supply unit 10 generates the power required for the monitor to supply the power required for the display driver and the display, and a voltage (D) through the diode D3 to the controller 5 VR) is supplied to the microcontroller of the controller 5 to prevent the current from flowing backwards even when + 5V and power supplied from the computer are supplied in parallel. At this time, the monitor 1 receives an image signal supplied from a computer and displays it on the corresponding display.

VGA 커넥터 사용 시 모니터 절전 Monitor sleep when using the VGA connector 모드mode 제어 Control

If the computer is turned on and not used for a certain period of time, the following describes the case where the monitor power off time is set to save power. If no operation is performed for a predetermined time, the computer enters the power saving mode. The microcontroller of the controller 5 does not transmit the synchronization signals V-sync (I3) and H-sync (I4). When + 5V checks the signal input to the input terminal I1 through the resistor R1, if I1 is 'high' and the two signals I3 and I4 are not input, it is determined that the computer is in the power saving mode. The controller 5 controls the power supply / blocking unit 30 to cut off the AC power supplied to the monitor 1 to completely cut off the power consumed by the monitor. In this state, when the computer mouse is moved or the keyboard is pressed, the computer transmits the synchronization signals V-sync and H-sync again, and thus performs the above power supply control.

VGA 커넥터 사용 시 전원 차단 제어 Power-Off Control When Using a VGA Connector

If it is determined that the input signal I1 is 'low' to the microcontroller of the controller 5 without the synchronization signals V-sync and H-sync transmitted from the computer, the controller 5 determines that the computer power is turned off. The control unit cuts off the power supply / blocking unit 30 to cut off the AC power supplied to the monitor 1 to completely cut off the power consumed by the monitor 1.

HDMIHDMI 커넥터 사용시 전원공급 제어 Power supply control when using connector

When the computer is turned on while the monitor 1 is powered off, + 5V, TMDS signals are input from the computer through the HDMI cable and the HDMI connector to the monitor 1. At this time, the voltage VR is supplied to the microcontroller of the controller 5 through the diode D2. When the voltage VR is supplied to the microcontroller, the microcontroller controls the power supply / disconnector 30. Start supplying AC power to the monitor (1).

When power is supplied to the power supply unit 10, the power supply unit 10 generates power required for the monitor 1, supplies power required for the display driver and the display, and controls the voltage VR through the diode D3 to the control unit 5. Supplying to the microcontroller of (5) prevents current from flowing backwards even when + 5V supplied from a computer and power are supplied in parallel. At this time, the monitor 1 receives an image signal supplied from a computer and displays it on the corresponding display.

HDMIHDMI 커넥터 사용시 절전 Sleep when using connector 모드mode 제어 Control

If you turn on the computer and do not use it for a certain period of time while the computer is on, you can set the monitor power off time to save power. The computer will not transmit the TMDS clock signal if no operation is performed for a predetermined time.

The TMDS clock signal is converted to a level in the TMDS converter in order to match the voltage level, and is transmitted to the microcontroller of the controller 5. The signal and + 5V are input to the input terminal I1 through the resistor R2. If I1 is 'high' and the TMDS clock signal is not input, it is determined that the computer is in a power saving mode, and the control unit 5 controls the power supply / disconnection unit 30 to supply AC power to the monitor 1. By blocking the power is completely cut off from the monitor (1).

In this state, when the computer mouse is moved or the keyboard is pressed, the computer transmits the TMDS clock signal again. Therefore, when the TMDS clock signal is supplied, the control unit 5 performs the power supply control.

HDMIHDMI 커넥터 사용시 모니터 전원 차단 제어 Monitor power off control when using connector

If the TMDS clock signal is not transmitted from the computer and the input signal I1 of the microcontroller of the controller 5 is determined to be 'low', it is determined that the computer power is turned off, and the controller 5 supplies the power supply / disconnector 30. Control to block the cut off the AC power supplied to the monitor 1 to completely cut off the power consumed by the monitor (1).

빔프로젝터의 전원 공급 제어Power supply control of the beam projector

The power supply control in the case of receiving a VGA signal from the computer is described. When the computer is turned on while the beam projector 2 is turned off, the RGB video signal and the + 5V are synchronized with the RGB video signal through the VGA cable and the VGA connector from the computer. Signals V-sync and H-sync are input to the beam projector 2. At this time, the voltage VR is supplied to the microcontroller of the controller 5 by + 5V through the diode D1. When VR is supplied to the microcontroller, the microcontroller controls the power supply / disconnector 30 to supply AC power to the power supply unit ( To 10). The power supply unit 10 inputs AC power to make and supply power required for the beam projector. At this time, the voltage VR is supplied to the microcontroller of the controller 5 through the diode D3 so that + 5V and power supplied from the computer are supplied in parallel, thereby preventing current from flowing in reverse with each other. At this time, the beam projector 2 receives the image signal supplied from the computer and displays the contents of the corresponding display on the screen through the reflector and the lens by turning on the lamp. At this time, the fan is also controlled and operated for cooling.

빔프로젝터의 절전 Power saving of the beam projector 모드mode 제어 Control

If you turn on the computer and do not use it for a while, set the monitor power off time to save power. If no operation is performed for a predetermined time, the computer does not transmit the synchronization signals (V-sync and H-sync), so that the microcontroller of the controller 5 receives this signal and + 5V through the resistor R1 to the input terminal I1. If I1 is 'high' and the two signals are not input, it is determined that the computer is in the power saving mode. Turn off the lamp to cut off the power and check the internal temperature value from the temperature sensor to cool the heated temperature during operation. When the measured temperature falls below a preset temperature, the fan is turned off, and the control unit 5 controls the power supply / disconnector 30 to cut off the AC power supplied to the beam projector 2 so that the beam projector 2 Cut off power consumption completely. In this state, when the computer mouse is moved or the keyboard is pressed, the computer transmits the synchronization signals V-sync and H-sync again, and thus performs the power supply control.

In the case of using the HDMI signal received from the computer, when the computer is turned on while the beam projector 2 is turned off, + 5V and TMDS signals are input from the computer through the HDMI cable and the HDMI connector. The Transition Minimized Differential Signaling (TMDS) signal is inputted directly to the microcontroller of the controller 5, so the voltage level does not match, and the TMDS converter converts the voltage level and supplies it to the microcontroller. At this time, + 5V is supplied to the microcontroller of the controller 5 through the voltage D2 through the diode D2. When VR is supplied to the microcontroller, the microcontroller controls the power supply / disruption unit 30 to control the beam projector 2. Start to supply AC power. Therefore, when AC power is supplied to the power supply unit 10, the power supply unit 10 generates power required for the beam projector, and supplies the voltage VR to the microcontroller of the control unit 5 through the diode D3 to the control unit 5 from the computer. Supply + 5V and power in parallel to prevent current from flowing backwards to each other.

At this time, the beam projector 2 receives the image signal supplied from the computer and displays the contents of the corresponding display on the screen through the reflector and the lens by turning on the lamp. At this time, the fan is also controlled and operated for cooling.

When the computer is turned on and not in use for a certain period of time, and you set the monitor power off time to save power, the computer will not transmit the TMDS clock signal if you do nothing during the set time.

The microcontroller of the control unit 5 checks this signal and the signal + 5V is input to the input I1 through the resistor R2, and if the I1 is 'high' and the TMDS clock signal is not input, the computer saves power. To determine the mode, turn off the lamp to cut off the power, and check the internal temperature value from the temperature sensor to cool the heated temperature during operation. When the temperature is lower than the set temperature, the fan is turned off, and the controller 5 controls the power supply / disconnector 30 to cut off the AC power supplied to the beam projector 2 to completely remove power consumed by the monitor. Block it.

In this state, when the computer mouse is moved or the keyboard is pressed, the computer transmits the TMDS clock signal again and performs the power supply control step.

빔프로젝터의 전원 차단 제어Power down control of the beam projector

If the input signals I1 are determined to be 'low' to the microcontroller of the controller 5 without the synchronization signals (V-sync and H-sync) or the TMDS clock signal from the computer, it is determined that the computer is turned off. Turn off the lamp to shut off and check the internal temperature value from the temperature sensor to cool the heated temperature during operation. When the measured temperature is lower than the preset temperature, the fan is turned off and the power supply / disconnector 30 is controlled to cut off the AC power supplied to the beam projector 2 to reduce the power consumed by the beam projector 2. Block it completely.

Meanwhile, the detailed description of the present invention as described above has been described with reference to specific embodiments, but it will be understood by those skilled in the art that various changes and modifications can be made without departing from the scope of the present invention. will be. Therefore, the scope of the present invention should not be limited to the above-described embodiments, but should be defined not only by the claims below but also by the equivalents of the claims.

The present invention contributes to reducing power consumption of the electronic device by cutting off the power supply of the monitor in the computer power saving mode and standby power consumption of the monitor or beam projector connected to the computer.

Claims

As a computer peripheral having a standby power blocking function, in particular a monitor device (1),

A video graphics array (VGA) connector connected to a computer for inputting + 5V voltage and synchronization signals (V-sync and H-sync);

A High Definition Multimedia Interface (HDMI) connector connected to the computer for inputting a + 5V voltage and a Transition Minimized Differential Signaling (TMDS) clock signal;

A display for outputting an image input from the computer via the VGA connector or the HDMI connector;

A display driver driving the display to provide an image signal;

A control unit (5) having a microcontroller for controlling power supply by checking and / or determining various signals and power supply states from each component including the synchronization signal; And

In the monitor device comprising a power supply unit 10 for supplying the power required for the operation of the control unit 5, the display, each part including the display driver,

The monitor device includes a power supply / blocking unit (30) connected to the power supply unit (10) and the control unit (5) to perform a function for adjusting supply / disconnection of AC power;

When the VGA cable is used, a power supply voltage supplied from a computer via a VGA cable is applied to the microcontroller of the controller 5 so that the controller 5 supplies the power supply / blocker. Control 30 to an active state to supply power to the monitor;

The monitor device 1 connects a voltage (+ 5V) supplied from the computer through the VGA / HDMI connector to one end of the resistor R1 and the resistor R2, and the resistors R1 and R2. Means for connecting the other end in common and connecting it to an input (I1) of a microcontroller of said control part (5) to sense on / off of said computer;

The monitor device 1 supplies the diode D3 to the power supply of the power supply unit 10 so that the power of the monitor 10 is prevented from being immediately cut off even when the computer is turned off and the voltage (+ 5V) supplied from the computer is cut off. A power supply means configured to continuously apply a voltage VR to the microcontroller through;

The monitor device 1 has a power supply voltage supplied from a computer via a VGA connector 3 or an HDMI connector 4 connected to a monitor device from a computer via a diode D1 or a diode D2 to the cathode of the diodes, respectively. And a current backflow prevention means for preventing backflow of current by a collision between power supplies, the power supply being configured to be input to the microcontroller through a commonly connected connection point (A).
The method of claim 1,

When the HDMI cable is used, the power supply voltage supplied from the computer to the HDMI cable is applied to the microcontroller of the controller 5 so that the controller 5 supplies the power supply / blocker 30. And a TMDS converter configured to control an active state to supply power to the monitor, and receive the TMDS clock signal and convert the input signal into an input level for the microcontroller.
The method according to claim 1 or 2,

The power supply / blocking unit (30) comprises a relay or a triac controlled in an activated or deactivated state under control from the control unit (5).
The monitor device according to claim 1 or 2, wherein the power supply voltage is essentially + 5V.
As a computer peripheral having a standby power blocking function, especially a beam projector (2),

A video graphics array (VGA) connector connected to a computer for inputting + 5V voltage and synchronization signals (V-sync and H-sync);

A High Definition Multimedia Interface (HDMI) connector connected to the computer for inputting a + 5V voltage and a Transition Minimized Differential Signaling (TMDS) clock signal;

R.G.B. input from the computer via the VGA connector or the HDMI connector. A display lens component outputting an image;

A lamp serving as a light source for projecting an image signal output from the display lens component;

A control unit (5) having a microcontroller for controlling power supply by checking and / or determining various signals and power supply states from each component including the synchronization signal; And

In the beam projector (2) comprising a control unit (5), a power supply unit (10) for providing the power required for the operation of each part including the display, the display driver,

The beam projector (2) includes a power supply / blocking unit (30) connected to the power supply unit (10) and the control unit (5) to perform a function for adjusting supply / disconnection of AC power;

In the case of using the VGA cable, the controller 5 is supplied with a power supply voltage (+ 5V) supplied from a computer via a VGA cable to the microcontroller of the controller 5 so that the controller 5 supplies the power. Control the supply / blocking section 30 to an active state to supply power to the beam projector;

The beam projector 2 connects a voltage (+ 5V) supplied from the computer through the VGA / HDMI connector to one end of the resistor R1 and the resistor R2, and the resistors R1 and R2. Means for connecting the other end in common and connecting it to an input (I1) of a microcontroller of said control part (5) to sense on / off of said computer;

The beam projector 2 supplies power to the power supply unit 10 to prevent the power supply of the beam projector 2 from being immediately cut off even when the computer is turned off and the voltage (+ 5V) supplied from the computer is cut off. A power supply means configured to continuously apply a voltage VR to the microcontroller through a diode D3;

The beam projector 2 is connected to a cathode of the diodes via a diode D1 or a diode D2, with power supplied from a computer via a VGA cable or an HDMI cable connected to the beam projector 2, respectively. And a current backflow prevention means for preventing backflow of current by a collision between power supplies, the power supply being configured to be input to the microcontroller through a connection point (A).
The method of claim 5,

When the HDMI cable is used, the power supply voltage supplied from the computer to the HDMI cable is applied to the microcontroller of the controller 5 so that the controller 5 supplies the power supply / blocker 30. And a TMDS converter configured to control an active state to supply power to the beam projector, and receive and convert the TMDS clock signal into an input level for the microcontroller.
The method according to claim 5 or 6,

The power supply / blocking unit (30) comprises a relay or a triac controlled in an activated or deactivated state under control from the control unit (5).
7. The beam projector of claim 5 or 6, wherein the power supply voltage is essentially + 5V.
The method according to claim 5 or 6,

The beam projector is disposed at an appropriate position inside the beam projector 2 with a fan as a means for cooling the heat generated from the lamp during operation, and measures the ambient temperature and the measured temperature value in the controller 5. Further comprising a temperature sensor for providing, wherein the control unit (5) controls the drive to prevent excessive rise in the internal temperature of the device if necessary according to the measured temperature value.