JP2010122261A - Image projection device, and emergency guidance image projection method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform emergency guidance by securing a light source of a projector during power failure due to disaster or trouble. <P>SOLUTION: The image projection device includes: a projection image processing part 160; a main power supply 115 being a power supply, for operating the projection image processing part 160 and using external power 105; an auxiliary power supply 120 charged with power; a switching part 130 switching between the main power supply and the auxiliary power supply 120; a voltage monitoring part 110 monitoring voltage of the external power 105; a power supply switching controller 155 determining, based on the monitored result by the voltage monitoring part 110, whether or not the voltage of the external power 105 is equal to or under a predetermined value, and performing control, when determining that the voltage is equal to or under the predetermined value, to cause the switching part 130 to switch the power supply from the main power supply 115 to the auxiliary power supply 120; a storage part 140 with emergency guidance image data stored therein; and an emergency guidance image projection controller 156 performing control, when switching the power supply from the main power supply 115 to the auxiliary power supply 120, to read out the emergency guidance image data and cause the projection image processing part 160 to project the emergency guidance image. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an image projection apparatus and an emergency guidance image projection method.

There is a projector as an apparatus for projecting and displaying images and videos. The projector is often used in a room where many people gather for the purpose of, for example, a conference, an academic conference, a class, or a presentation.
In this way, when a large number of people are gathering in the room, if an emergency such as a fire occurs somewhere in the building, the building manager guides the evacuation.

By the way, regarding such evacuation guidance, conventionally, the one described in Patent Document 1 below can be cited. With this technology, the optimum evacuation route is selected based on the information on the location of the fire and the location of the projector, and the evacuation guidance is provided by projecting and displaying the location of the fire and the selected evacuation route. It was.

Japanese Patent No. 4010273

However, when a power outage occurs due to a disaster, the projector blacks out, and there is a problem that it is not possible to select an evacuation route and appropriately guide evacuation.

The present invention has been made in view of the above-described problems, and an object thereof is to provide emergency guidance by securing a light source of a projector at the time of a power failure due to a disaster or trouble.

To achieve the above object, an image projection apparatus according to the present invention includes a projection image processing unit, a main power source that operates the projection image processing unit and uses external power, an auxiliary power source, and the main power source. And a switching unit that switches between the auxiliary power source, a voltage monitoring unit that monitors the voltage of the external power, and whether or not the voltage of the external power is a predetermined value or less based on the monitoring result of the voltage monitoring unit, When it is determined that the voltage is equal to or lower than a predetermined value, a power source switching control unit that controls the switching unit to switch the power source from the main power source to the auxiliary power source, and a storage unit that stores emergency guidance image data And an emergency guidance image projection control unit that performs control to read out emergency guidance image data and project the emergency guidance image to the projection image processing unit when the power source is switched from the main power source to the auxiliary power source. Be

According to the image projection apparatus of the present invention, the light source of the projector is secured and the emergency guidance image is projected by switching from the main power source to the auxiliary power source at the time of a power failure due to a disaster or trouble. Therefore, the blackout of the projector due to a power failure can be prevented, and the emergency guidance image can be reliably projected.

The auxiliary power supply of the present invention is, for example, various types of rechargeable batteries, various dry batteries, or the like that can be charged by external power for operating the projector or power from other power sources.

The power source switching control unit further controls the switching unit to switch the power source from the main power source to the auxiliary power source after a predetermined time has elapsed since it was determined that the voltage of the external power is not more than a predetermined value. It is characterized by performing.

According to the image projection apparatus of the present invention, since the main power source is switched to the auxiliary power source after a lapse of a certain time, for example, if a power failure that recovers within the certain time due to a lightning strike or a short-circuit accident, After returning, the projector operates with the main power supply. In other words, if a power failure returns within a certain time, the auxiliary power supply cannot be switched, so that the emergency guidance image is not projected, and the image projected before the power failure can be continuously projected after the power failure is restored. .

Here, the fixed time is a short time (for example, 2 seconds to
About 5 seconds) is preferable.

The present invention includes an emergency guidance image projection method applied to the image projection apparatus. That is, when it is determined that the voltage of the external power is equal to or lower than a predetermined value, the power source is switched from the main power source to the auxiliary power source, and applied to an image projection apparatus that performs control for projecting an emergency guidance image. A step of monitoring, a step of determining whether or not the voltage of the external power is below a predetermined value, and a step of switching the power source from the main power source to the auxiliary power source when it is determined that the voltage is below the predetermined value; Reading out emergency guidance image data when the power source is switched from the main power source to the auxiliary power source, and projecting an emergency guidance image based on the emergency guidance image data;
It is characterized by having.

According to the emergency guidance image projection method of the present invention, the power source for operating the projector during a power failure can be switched from the main power source to the auxiliary power source, and can be applied to an image projection apparatus that projects an emergency guidance image.

Embodiments of the present invention will be described below with reference to FIGS. In the present embodiment, the image projection apparatus is described as a projector.

FIG. 1 is a block diagram illustrating a schematic configuration of the projector 100. Projector 100
Are a voltage monitoring unit 110, a main power source 115, an auxiliary power source 120, a switching unit 130, a projection image processing unit 160, a lamp driving unit 170, an image generation unit 165, a projection optical system 175, and a power source switching control unit 1.
55, emergency guidance image projection control unit 156, timer 135, storage unit 140, operation unit 150,
An input unit 145, a switch unit S, and a CPU (not shown) are provided. In the projector 100, when the switch unit S is turned on, power is supplied from an external power source 105 serving as a main power source of the projector 100, and image projection is performed.

The voltage monitoring unit 110 is connected to the external power 105 on the input side of the switch unit S, and the external power 1
In addition to monitoring the voltage of 05, the monitoring result is transmitted to the power supply switching control unit 155. In addition, power supplied from the external power 105 is supplied to the switching unit 130 via the main power supply 115.

The main power supply 115 is provided with an AC-DC converter (not shown), and is a power supply for projecting an image of the projector 1 when the power of the external power 105 is supplied by the ON operation of the switch unit S.

The auxiliary power source 120 is connected to the external power 105 and is normally charged by the power of the external power 105. When the voltage becomes a predetermined value or less (power failure), the power of the auxiliary power source 120 passes through the switching unit 130. Supplied.

The switching unit 130 is controlled by the projector 100 according to a control signal from the power supply switching control unit 155.
The power source necessary for image projection is switched from the main power source 115 to the auxiliary power source 120.

The timer 135 is connected to the power supply switching control unit 155, and starts timing by a control signal from the power supply switching control unit 155 simultaneously with the start of the power failure.
Is controlled to send to.

The storage unit 140 includes various programs executed by the CPU, various application programs, a ROM that stores emergency guidance image data and various data, a RAM that temporarily stores various information and calculation results, and the like. Then, various programs and various data are taken in and out based on requests from the power supply switching control unit 155 and the emergency guidance image projection control unit 156.

The input unit 145 performs an operation of resetting the control of the power supply switching control unit 155 via the operation unit 150 when the power failure is canceled after switching from the main power source 115 to the auxiliary power source 120 at the time of a power failure, for example. . In addition, a condition for switching from the main power source 115 to the auxiliary power source 120 at the time of a power failure can be input to the power source switching control unit 155 via the operation unit 150. In other words, the power source for operating the projector 100 can be returned to the main power source 115 by the control reset. In addition, the condition for switching from the main power supply 115 to the auxiliary power supply 120 at the time of a power failure can be set / changed.

The power source switching control unit 155 performs control to switch the power source necessary for projecting an image of the projector 100 from the main power source 115 to the auxiliary power source 120 in the event of a power failure by a power source switching program executed by the CPU. That is, when the voltage monitoring unit 110 detects that the voltage of the external power 105 has become equal to or lower than a predetermined value, and the timer 135 measures that a state where the voltage is equal to or lower than the predetermined value has elapsed for a certain time, the switching unit 130. A power supply switching signal is transmitted. Based on the received power switching signal, the switching unit 130 switches the power source from the main power source 115 to the auxiliary power source 120.

The predetermined voltage value here may be a voltage value lower than the voltage value that allows the projector 100 to operate normally, and does not necessarily have to be 0 voltage (complete power failure). That is, the power supply may be switched from the main power supply 115 to the auxiliary power supply 120 in the state where some abnormality has occurred in the electrical equipment and the voltage of the external power 105 has dropped, or the power supply can be switched on in a state of complete power failure. The main power supply 115 may be switched to the auxiliary power supply 120.

The emergency guidance image projection control unit 156 performs control to project an emergency guidance image when the main power source 115 is switched to the auxiliary power source 120 at the time of a power failure by an emergency guidance image projection program executed by the CPU. That is, when a switching signal for switching the power source transmitted from the power source switching control unit 155 from the main power source 115 to the auxiliary power source 120 is received, the storage unit 1
The emergency guidance image projection data is read from 40, and the emergency guidance image projection data is transmitted to the projection image processing unit 160. Further, when the switching signal is received, the projected image processing unit 16
To 0, an image projection stop signal for stopping projection of the image projected before the power failure is transmitted.

The projection image processing unit 160 receives an image signal, an emergency guidance image signal, and an image projection stop signal from a storage medium, a network (none of which are shown), and the received image signal and emergency guidance image signal. Light modulation element (for example, liquid crystal panel) that displays an image based on
The image generation unit 165 is controlled to be driven and stopped. Image generation unit 165
The image displayed on the screen is projected onto a screen (not shown) via the projection optical system 175 by the light emitted from the lamp driving unit 170.

Therefore, the projector 100 according to the present embodiment can project emergency guidance in an emergency by securing a light source with the auxiliary power source 120 included in the projector 100 even when a power failure occurs. Furthermore, the light projected by the projector 100 can be used as illumination when evacuating.

In FIG. 1, each part surrounded by a virtual line can be turned on by operating the switch part S.
When the power is normal, power is supplied from the main power supply 115, and even during a power failure, the power supply switching control unit 15
Power is supplied from the auxiliary power source 120 regardless of the control of 5.

FIG. 2 is a diagram illustrating an example of an emergency guidance image according to the present embodiment. This emergency guidance image is an evacuation guidance image for guiding an evacuation exit, and indicates the position of the screen A1 in the room A and the position of the evacuation exit A2, and the evacuation exit A2 is indicated by an arrow A3. In other words, it is possible to determine at a glance whether the position of the evacuation port A2 is the front, back, left or right position toward the screen A1, so that efficient evacuation guidance is performed. In addition, this emergency guidance image is not limited to the example illustrated,
Any image that can be used for emergency guidance such as an image that can be efficiently evacuated, a message that prompts evacuation, and a caution message during evacuation may be used.

FIG. 3 shows a program including a method in which the projector 100 according to the present embodiment switches a power source necessary for projecting an image of the projector 100 from a main power source 115 to an auxiliary power source 120 and a method for projecting an emergency guidance image in the event of a power failure. It is a flowchart. This program is a program that is activated when the projector 100 is activated (the switch unit S is turned on) (step S1). The power supply in the state where the projector 100 is activated is the main power supply 115.
The projector 100 projects an image with the power of the main power source.

When the projector 100 is activated, voltage monitoring of the external power 105 by the voltage monitoring unit 110 is started (step S2). This monitoring result is transmitted to the power supply switching control unit 155 in real time (step S3).

During the voltage monitoring, the voltage drops, and a predetermined voltage value that is recognized as a power failure is set to the power supply switching control unit 1.
When 55 is determined (step S4), the timer 135 is started to measure time (step S5). When the timer 135 counts, it is transmitted to the power supply switching control unit 155 in real time (step S6).

When the power supply switching control unit 155 determines that a certain time has elapsed during the time measurement (step S7), a switching signal is transmitted to the switching unit 130 based on the determination result (step S8). The switching unit 130 switches the power source from the main power source 115 to the auxiliary power source 120 based on the received switching signal (step S9).

This switching signal is also transmitted to the emergency guidance image projection control unit 156, and the emergency guidance image data is read based on this switching signal (step S10). Further, an image projection stop signal is transmitted to the projection image processing unit 160 (step S11), and projection of the projected image is stopped (step S12). In addition, the read emergency guidance image data is transmitted to the projection image processing unit 160 (step S13), and emergency guidance image projection by the auxiliary power source 120 is performed based on the emergency guidance image data (step S14).

In the image projection of the projector 100 by the auxiliary power source 120, the emergency guidance image may be projected in a state where the image projected before the power failure is projected.

According to the program of the present embodiment, when the projector 100 is out of power, the projector 10
It is possible to execute control for switching the power source for operating 0 from the main power source 115 to the auxiliary power source 120 after elapse of a predetermined time and control for projecting an emergency guidance image.

As mentioned above, although embodiment of this invention was described based on drawing, this invention is not limited to the example of illustration and each example mentioned above, In the category of the technical idea described in the claim, it is various. It can be changed. For example, control may be performed so that the power source is switched from the main power source to the auxiliary power source regardless of the time after determination of a predetermined voltage value recognized as a power failure.

The block diagram which shows schematic structure of the projector main body which implement | achieves the guidance method at the time of a power failure. An example of an emergency guidance image is shown. The flowchart of the program which an image projection apparatus performs.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100: Projector (image projection apparatus) 105: External power 110: Voltage monitoring part 115: Main power supply 120: Auxiliary power supply 130: Switching part 135: Timer 155: Power supply switching control part 156: Emergency guidance image projection control part 160: Projected image Processing part

Claims (3)

A projection image processing unit;
A main power source that operates the projection image processing unit and uses external power, and an auxiliary power source;
A switching unit for switching between the main power source and the auxiliary power source;
A voltage monitoring unit for monitoring the voltage of external power;
Based on the monitoring result of the voltage monitoring unit, it is determined whether or not the voltage of the external power is a predetermined value or less, and when it is determined that the voltage is a predetermined value or less, for the switching unit, A power source switching control unit that performs control to switch the power source from the main power source to the auxiliary power source;
A storage unit storing emergency guidance image data;
An emergency guide image projection control unit that reads out emergency guide image data and controls the projection image processing unit to project an emergency guide image when the power source is switched from the main power source to the auxiliary power source is provided. Image projection device. The power source switching control unit further controls the switching unit to switch the power source from the main power source to the auxiliary power source after a predetermined time has elapsed from when it is determined that the voltage of the external power is equal to or lower than a predetermined value. The image projection device according to claim 1, wherein the image projection device is a device. When it is determined that the voltage of the external power is equal to or lower than a predetermined value, the power source is switched from the main power source to the auxiliary power source, and applied to an image projection apparatus that performs control to project an emergency guidance image.
Monitoring external power voltage;
Determining whether the voltage of the external power is below a predetermined value;
Switching the power source from the main power source to the auxiliary power source when the voltage is determined to be equal to or lower than a predetermined value;
When the power source is switched from the main power source to the auxiliary power source, the emergency guidance image data is read, and the emergency guidance image based on the emergency guidance image data is projected;
A power supply switching method characterized by comprising:

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