JP2017009968A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector that can prevent projection light from directly reaching the eyes of a user at the start of projection.SOLUTION: A projector comprises: an operation part 22 that receives an operation from a user; a projection lens 15 that projects light according to an image signal; a shutter 19 that blocks light from the projection lens 15; and control means that controls the shutter 19 to open at a first speed in response to the operation part 22 receiving a first operation and controls the shutter 19 to open at a second speed different from the first speed in response to the operation part 22 receiving a second operation after the reception of the first operation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projector that projects an image or video.

  In recent years, projection projectors that project light emitted from a light source device onto a screen have been widely used. Here, when a high-intensity light is projected from the projector, a safety problem has been pointed out in which the user directly receives the light. In order to cope with this safety problem, a technique for preventing the user from directly receiving the strong light projected from the projector has been proposed.

  For example, rather than suddenly projecting high-brightness projection light from the projection unit, the light intensity is increased stepwise according to each user's operation, and controlled from low-brightness to high-brightness light. Can do. As a result, when light is projected by a user operation while the user is entering the projection area, control is performed so as to project low-brightness and safe light instead of suddenly projecting high-brightness light. There are already known methods that can alert the user and deal with safety issues.

  In Patent Document 1, for the purpose of dealing with a safety problem in which a user in a projection area of a projector receives a dangerous projection light in his / her eyes, the projector is projected with light having low light intensity at the start of projection of the projector, Means for changing the light intensity by a user operation is disclosed.

  However, the technique disclosed in Patent Document 1 is a method of reducing glare by projecting at a low brightness at the start of projection of the projector. If the user has entered the projection area at the start of projection of the projector, there are not a few. There was a problem that the light hit the user's eyes. In particular, in recent years, a solid light source such as a laser beam has been used as a light source, and it is better that even a weak light is not visible to the user.

  Therefore, an object of the present invention is to provide a projector that can prevent projection light from directly hitting the eyes of the user at the start of projection.

  In order to achieve such an object, a projector according to the present invention includes an operation unit that receives an operation from a user, a projection unit that projects light according to an image signal, a shutter unit that blocks light from the projection unit, In response to the operation unit receiving the first operation, the shutter unit is controlled to open at a first speed, and after the operation unit receives the first operation, the second operation is received. And a control means for controlling the shutter unit to open at a second speed different from the first speed.

  According to the present invention, it is possible to prevent the projection light from being directly applied to the user's eyes when the projection of the projector is started.

It is a block diagram which shows the structure of the projector which concerns on this embodiment. It is a flowchart which shows the projection start process of the projector which concerns on this embodiment. It is a perspective view which shows the structure of the projector which concerns on this embodiment. It is a figure which shows the state which the shutter of the projector which concerns on this embodiment opens. It is a figure which shows the screen which the projector concerning this embodiment projected on the screen.

  Hereinafter, the configuration according to the present invention will be described in detail based on the embodiment shown in FIGS.

  FIG. 1 is a block diagram showing a configuration of a projector 1 according to the present embodiment. The projector 1 includes a system control unit 3, an operation unit 22, a remote control reception unit 5, a fan control unit 6, a fan 7, a DMD control unit 8, a CW control unit 9, a rotation detection unit 10, a light source control unit 11, a light source 12, and a color. A wheel 13, a DMD (Digital Mirror Device) 14, a projection lens 15, a motor control unit 17, a motor 18, a shutter 19, an external connection unit 20, a storage unit 21, a power supply unit 23, and a power cord 24 are provided.

  The system control unit 3 includes, for example, a CPU (Central Processing Unit) and its peripheral circuits, and controls the entire projector 1 by executing a program stored in the storage unit 21 or the like, for example. The storage unit 21 includes, for example, a RAM (Random Access Memory), a flash ROM (Read Only Memory), and / or a storage. The storage unit 21 stores various programs of the projector 1, image data to be projected including guidance information to the user, various setting data, and the like.

  The external connection unit 20 is a video (image) signal from the external device 25, for example, an image output signal from a computer, an HDMI (registered trademark) signal from a video device, a video signal, an image signal from a network device, or the like. Is an interface for inputting.

The operation unit 22 is a display input unit that displays various types of information and performs settings and operations of the projector 1. The remote control receiving unit 5 receives a signal from the remote control 4 and accepts a remote operation.
The fan control unit 6 controls the fan 7 so that the temperature inside the light source 12 and the apparatus becomes a predetermined temperature.

The projection unit (projection unit) 16 includes, for example, a light source 12, a light source control unit 11, a color wheel 13, a rotation detection unit 10, a CW control unit 9, a DMD 14, a DMD control unit 8, a projection lens 15, and the like.
The light source 12 is a light source for image projection such as a lamp, a solid light source such as an LED (Light Emitting Diode) or a semiconductor laser. The light source control unit 11 performs control of brightness of the light source 12 and lighting / extinguishing.

  The color wheel 13 performs coloring by rotating a disk or the like color-coded into three colors of red, blue, and green at high speed and transmitting light from the light source 12, for example. The rotation detection unit 10 detects the rotation state of the color wheel 13. The CW control unit 9 controls the rotation of the color wheel 13.

  The DMD 14 is a display element in which a large number of micromirror surfaces (micromirrors) are arranged on a plane. The DMD control unit 8 controls on / off of the micromirrors of the DMD 14. The DMD 14 and the color wheel 13 are examples of display elements for image projection, and may be other display elements such as an LCD (Liquid Crystal Display).

  The light emitted from the light source 12 is colored by the color wheel 13, reflected by the DMD 14 whose direction is controlled for each pixel according to the image to be projected, and projected onto the projection surface such as the screen 2 through the projection lens 15 to form an image. Tie.

The shutter 19 closes the shutter 19 to protect the projection lens 15 when not projecting. The shutter may also be closed when the image is muted during projection. The shutter 19 is opened and closed as the motor 18 controlled by the motor control unit 17 moves.
The power supply unit 23 generates drive power for each component module of the projector 1 from power supplied from, for example, an outlet via the power cord 24.

  Although this embodiment has been described by taking a DLP (Digital Light Processing) (registered trademark) projector as an example, the projector is not limited to a DLP, and may be a projector of another type.

  FIG. 2 is a flowchart showing the projection start process of the projector 1 according to this embodiment. FIG. 3 is a perspective view showing a configuration of the projector 1 according to the present embodiment. The projector 1 includes a shutter 19, an operation unit 22, a Power button 30, an Enter button 31, and an LED light emitting unit 32.

The shutter 19 is installed on the front side surface of the projector 1 and can cover the projection lens 15.
The operation unit 22, the Power button 30, and the Enter button 31 are installed on the upper surface of the projector 1. Note that the positions of the operation unit 22, the Power button 30, and the Enter button 31 are not limited to the top surface of the projector 1, and may be disposed on the side surface or the like.

  An LED light emitting unit 32 is disposed around the Power button 30 and the LED light emitting unit 32 can blink. In addition, the LED light emission part 32 may be arrange | positioned not only around the Power button 30 but around the Enter button 31.

  First, power is supplied from the outlet to the projector 1 via the power cord 24 (step S1). As shown in FIG. 3, by blinking the LED light emitting unit 32 arranged around the Power button 30, it is displayed to the user that it is in the power switch acceptance state (step S2).

It is determined whether or not the power switch is turned on according to the first lighting instruction of the LED light emitting unit 32 (step S3). The power switch is turned on by pressing down the power button 30 (first switch) of the operation unit 22 of the projector 1 or the power switch button (first switch) of the remote controller 4 (first operation).
After the power switch is turned on (step S3, Yes), the shutter 19 of the projector 1 opens at a slow speed that is the first speed (step S4).

FIG. 4 is a diagram illustrating a state in which the shutter 19 of the projector 1 according to the present embodiment is opened. The shutter 19 of the projector 1 is in a completely closed state. The shutter 19 of the projector 1 opens slowly from the bottom to the top and stops halfway. The projection lens 15 is in a state where the lower part appears and the upper part is covered with the shutter 19.
The position at which the shutter 19 stops can be arbitrarily changed. For example, when there are children, the position where the shutter 19 stops can be set low.

  An image of warning and operation guidance is projected onto the screen 2 in the projection area where the shutter 19 is opened (step S5). FIG. 5 is a diagram showing a screen projected on the screen 2 by the projector 1 according to the present embodiment. A region where the projection region and the non-projection region are combined is the maximum projectable region.

  The system control unit 3 transmits the image data stored in the storage unit 21, and the projection unit 16 projects a warning and operation guidance image as notification information onto a projection area where the shutter 19 is opened (notification unit). For example, the warning is “Please do not allow people to enter the projection area. Also, do not look into the lens.” The operation guidance is “When there is no person in the projection area, press the Enter switch. . "

  When a child is present and the position where the shutter 19 stops is set low, the warning area and the operation guidance may be displayed alternately because both the warning area and the operation guidance cannot be displayed at the same time.

  A portion where the shutter 19 is closed and the projection lens 15 is covered becomes a non-projection region, and no light is projected. Therefore, immediately after the start of projection, the projection is not performed up to the position of the person's line of sight, and even if there is a person in the projection region, there is an effect of preventing light from suddenly hitting the person's eyes.

  Next, it is determined whether or not the shutter 19 is fully opened (step S6). When the shutter 19 is fully open (step S6, Yes), the projector 1 projects the screen onto the screen 2 (step S7).

When the upper portion of the projection lens 15 is covered with the shutter 19 and the shutter 19 is not fully opened (No at Step S6), it is determined whether or not the Enter switch has been pressed according to the second lighting instruction of the LED light emitting unit 32 (Step S8). ). The Enter switch is the Enter button 31 of the operation unit 22 of the projector 1 or the Enter switch button of the remote controller 4 (second switch).
Instead of turning on the LED light emitting unit 32 for the second time, another LED light emitting unit may be installed around the Enter button 31 to give a second lighting instruction.

When the Enter button 31 which is the second operation or the Enter switch button of the remote controller 4 is pressed (Yes at Step S8), the shutter 19 is opened faster (second speed), and the shutter 19 is opened earlier ( Step S9).
As shown in FIG. 4, the shutter 19 is fully opened, and the projection lens 15 appears as a whole. The projection area is the maximum area that the projector 1 can project.

  The speed of opening the shutter 19 for the second time is faster than the speed of opening the shutter 19 for the first time. After confirming that the projection light does not hit the human eye, the user can quickly use the projector 1 by switching to the second speed at which the shutter 19 is opened at a high speed.

  When the Enter button 31 or the Enter switch button of the remote controller 4 is not pressed (No at Step S8), it is determined whether or not the shutter 19 is fully opened (Step S6).

  According to this embodiment, when the projector 1 does not project, the projection opening is closed by the shutter 19. When the projection is started, the shutter 19 is slowly opened and the projection area is gradually expanded. Then, the opening speed of the shutter 19 is increased by the user's operation, and the projection area becomes the maximum area that can be projected by the projector 1, so that the projection light does not directly hit the user's eyes when the projection of the projector 1 starts. can do.

  The above-described embodiment is a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 1 Projector 2 Screen 3 System control part 4 Remote control 5 Remote control reception part 6 Fan control part 7 Fan 8 DMD control part
9 CW control unit 10 Rotation detection unit 11 Light source control unit 12 Light source 13 Color wheel 14 DMD
DESCRIPTION OF SYMBOLS 15 Projection lens 16 Projection part 17 Motor control part 18 Motor 19 Shutter 20 External connection part 21 Memory | storage part 22 Operation part 23 Power supply part 24 Power cord 30 Power button 31 Enter button 32 LED light emission part

Japanese Patent No. 5445656

Claims (4)

An operation unit for receiving an operation from the user;
A projection unit that projects light according to the image signal;
A shutter unit that blocks light from the projection unit;
In response to the operation unit receiving the first operation, the shutter unit is controlled to open at a first speed, and after the operation unit receives the first operation, the second operation is received. And a control means for controlling the shutter unit to open at a second speed different from the first speed.
A projector comprising:   Furthermore, it has a notification means for causing the projection unit to display notification information including information for calling attention to the light projected from the projection unit in response to the operation unit receiving the first operation. The projector according to claim 1.   The projector according to claim 1, wherein the first speed is slower than the second speed. The projector according to any one of claims 1 to 3, wherein the first operation is an input of a first switch, and the second operation is an input of a second switch.