JP5834746B2 - Projector and projector control method - Google Patents

Description

  The present invention relates to a projector and a projector control method.

2. Description of the Related Art Conventionally, a method of operating a focus adjustment ring and a zoom adjustment ring provided in a projection lens when performing image focus adjustment and zoom adjustment during projection by a projector has been used.
In addition, in a presentation using a projector, when it is desired to temporarily stop projecting an image, a projector is known that can stop projecting an image by closing a sliding lens shutter as disclosed in Patent Document 1. By closing the projection lens with this lens shutter, the focus adjustment unit and the zoom adjustment unit can be simultaneously closed, so that it is possible to prevent the focus adjustment unit and the zoom adjustment unit from being erroneously operated. it can.

JP 2007-240551 A

  However, when the lens shutter is opened and the projection lens is exposed, the focus adjustment unit and the zoom adjustment unit are also exposed, which may cause operation during projection. Since the focus adjustment and the zoom adjustment are time-consuming, there is a problem that it is time-consuming to adjust to the correct position if the operation unit is accidentally touched or operated by a third party.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms or application examples.

  Application Example 1 A projector according to this application example includes an image projection unit that modulates light emitted from a light source according to image information, projects projection light onto a projection surface via a projection lens, and forms an image. A projector that includes a focus adjustment unit that performs focus adjustment of the image, a zoom adjustment unit that performs zoom size adjustment of the image, and an opening provided in a housing of the projector so as to face at least the projection lens A shutter for blocking the projection light, a shutter position detecting means for detecting whether the shutter is in a fully open position, a projection lens open position, or a closed position, and the operation of the projector. Control means for controlling, the shutter in the projection lens open position, and the closed position, When the control unit detects that the shutter is at the projection lens open position by the shutter position detection unit, the image projection is performed. The first image is projected by the means.

  According to this application example, after performing the focus adjustment and zoom adjustment of the image with the shutter set to the fully open position, the shutter is moved to the open position of the projection lens so that the opening of the projection lens remains open. The focus adjustment unit and the zoom adjustment unit are closed so as to be prohibited. Accordingly, it is possible to prohibit operations for focus adjustment and zoom adjustment while projecting an image.

  Application Example 2 In the projector according to the application example described above, it is preferable that the first image is an image indicating that operations of the focus adjustment unit and the zoom adjustment unit are prohibited.

  According to this application example, since the first image is an image indicating that the operations of the focus adjustment unit and the zoom adjustment unit are prohibited, the user can adjust the focus by projecting the first image. In addition, it is possible to notify that the zoom adjustment operation is prohibited.

  Application Example 3 In the projector according to the application example described above, the housing includes an exhaust port on the same surface as the opening, and the shutter is housed on a surface different from the one surface when fully opened. Features.

  According to this application example, the shutter is housed on a different surface from the exhaust port and the one surface having the opening. Therefore, even when the exhaust port is provided on the same surface as the opening, the shutter is opened when the shutter is fully opened. It is possible to prevent the exhaust port from interfering with each other.

  Application Example 4 An image projection unit that modulates light emitted from a light source according to image information, projects projection light onto a projection surface via a projection lens, and forms an image, and adjusts the focus of the image A focus adjustment unit that performs zoom size adjustment of the image, a zoom adjustment unit that adjusts the zoom size of the image, and at least closes an opening provided in the housing of the projector so as to face the projection lens and blocks the projection light A shutter position detection step for detecting whether the shutter is in a fully open position, a projection lens open position, or a closed position, and a shutter position detection step. When the shutter detects that the shutter is in the open position of the projection lens, a first image is projected by the image projection means. A first image projection step of projecting, and having a.

  According to this application example, after performing the focus adjustment and zoom adjustment of the image with the shutter set to the fully open position, the shutter is moved to the open position of the projection lens so that the opening of the projection lens remains open. The focus adjustment unit and the zoom adjustment unit are closed so as to be prohibited. Thereby, it is possible to prevent operations for focus adjustment and zoom adjustment while projecting the first image.

2A and 2B are perspective views of a projector, in which FIG. 1A shows a state where the shutter is in a closed position, FIG. 2B shows a state where the shutter is in a projection lens open position, and FIG. The block diagram which shows the circuit structure of a projector. 6 is a flowchart showing an operation when a movement of the shutter is detected during operation of the projector. The flowchart which shows operation | movement when a projector detects power-on operation. The figure which shows the focus and zoom adjustment operation prohibition message M1. It is a perspective view of the projector of the modification 1. (a) shows a state when a shutter is a closed position, (b) shows a shutter in a projection lens open position, (c) shows a shutter in a fully open position.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. However, the following embodiment does not limit the invention according to the scope of claims, and all combinations of features in the embodiment are based on the invention. It is not always essential to the solution.

(First embodiment)
FIG. 1 is a perspective view of the projector 1 according to the present embodiment. FIG. 1A shows a state where the shutter 4 is in the closed position, and FIG. 1B shows a state where the shutter 4 is in the projection lens open position. c) shows the state when the shutter 4 is in the fully open position.
As shown in FIG. 1, the projector 1 has a configuration in which the apparatus main body is covered by a housing 2 having an upper surface 2t, a front surface 2f, and the like. In the present embodiment, the projector 1 will be described assuming that the front surface 2f direction, which is the projection direction, is the front.

The upper surface 2t of the housing 2 is provided with an input operation means 23 having a plurality of operation keys on which an input operation is performed by a user.
An opening 3 is formed continuously on the front surface 2f of the housing 2 and the upper surface 2t adjacent to the front surface 2f. Inside the opening 3, a projection lens 13 that projects image light forward is provided. Is provided.
The projection lens 13 includes a focus adjustment unit 5 that adjusts the focus of the projected image and a zoom adjustment unit 6 that adjusts the zoom size. The focus adjustment unit 5 and the zoom adjustment unit 6 use a method of operating the focus adjustment ring and the zoom adjustment ring provided in the projection lens 13 with a knob.

  The opening 3 is provided with a shutter 4 as a cover member that can be opened and closed. By closing the opening 3 with the shutter 4, the projection lens 13 can be protected and the projection light can be shielded. ing.

  An exhaust port 7 is provided adjacent to the opening 3 on the front surface 2 f of the housing 2, and exhaust heat from the inside of the housing 2 is exhausted.

  The shutter 4 is configured to slide between the upper surface 2t of the housing 2 and the front surface 2f while being bent in a bellows shape, and is housed in the upper surface 2t of the housing 2 when fully opened. An operation knob 4a is formed on the shutter 4, and the shutter 4 can be moved while holding the operation knob 4a.

  FIG. 1A shows a state when the shutter 4 is in the closed position. At this time, the shutter 4 closes the opening 3, blocks the projection light from the projection lens 13, and prohibits the operations of the focus adjustment unit 5 and the zoom adjustment unit 6.

  FIG. 1B shows a state when the shutter 4 is at the projection lens open position. At this time, the shutter 4 partially opens the opening 3 and the projection lens 13 is exposed, but the focus adjustment unit 5 and the zoom adjustment unit 6 remain closed, and the focus adjustment unit 5 and The operation of the zoom adjustment unit 6 is prohibited.

  FIG. 1C shows a state when the shutter 4 is in the fully open position. At this time, the shutter 4 fully opens the opening 3, and the projection lens 13, the focus adjustment unit 5, and the zoom adjustment unit 6 are exposed, and image projection, focus adjustment, and zoom adjustment are possible.

  Further, a photo sensor (not shown) that detects the position of the shutter 4 is disposed inside the housing 2 and adjacent to the shutter 4, and the shutter 4 is in any of the fully open position, the projection lens open position, and the closed position. It is possible to determine whether it is in the position.

FIG. 2 is a block diagram illustrating a circuit configuration of the projector 1 according to the present embodiment.
As shown in FIG. 2, the projector 1 includes an image projection unit 10, a shutter position detection unit 15, an OSD processing unit 16, an image signal processing unit 17, an image signal input unit 18, a control unit 20, a storage unit 21, and an input operation unit. 23, the light source control means 25, the power supply terminal 30, the power supply part 31, etc., and these are accommodated in the housing | casing 2 (FIG. 1).

  The image projection means 10 includes a light source 11, three liquid crystal light valves 12R, 12G, and 12B as light modulation devices, a projection lens 13 as a projection optical system, a liquid crystal drive means 14, and the like. The image projection means 10 modulates the light emitted from the light source 11 with the liquid crystal light valves 12R, 12G, and 12B and projects the light from the projection lens 13 to display an image on the screen SC or the like.

The light source 11 includes a discharge-type light source lamp 11a made of an ultra-high pressure mercury lamp, a metal halide lamp, or the like, and a reflector 11b that reflects light emitted from the light source lamp 11a toward the liquid crystal light valves 12R, 12G, and 12B. ing.
Light emitted from the light source 11 is converted into light having a substantially uniform luminance distribution by an integrator optical system (not shown), and red (R), green (G), and blue, which are the three primary colors of light, by a color separation optical system (not shown). After being separated into each color light component of (B), it enters the liquid crystal light valves 12R, 12G, and 12B, respectively.

The liquid crystal light valves 12R, 12G, and 12B are configured by a liquid crystal panel in which liquid crystal is sealed between a pair of transparent substrates. In the liquid crystal light valves 12R, 12G, and 12B, a plurality of pixels (not shown) arranged in a matrix are formed, and a driving voltage can be applied to the liquid crystal for each pixel.
When the liquid crystal driving unit 14 applies a driving voltage corresponding to the input image information to each pixel, each pixel is set to a light transmittance corresponding to the image information. Therefore, the light emitted from the light source 11 is modulated by passing through the liquid crystal light valves 12R, 12G, and 12B, and image light corresponding to image information is formed for each color light.
The formed image light of each color is synthesized for each pixel by a color synthesis optical system (not shown) to become color image light, and then enlarged and projected onto the screen SC or the like by the projection lens 13.

  In the above embodiment, the projector 1 that projects using the light source lamp 11a as the light source 11 is exemplified, but the present invention is also applied to a projector that projects using an LED (Light Emitting Diode) light source or a laser light source as the light source. be able to. In the above-described embodiment, the image projection unit 10 is exemplified by a transmissive liquid crystal type projection optical system using the light source 11 and the three liquid crystal light valves 12R, 12G, and 12B as light modulators. You may employ | adopt the light modulation apparatus of other display systems, such as a display system and a micromirror device system (light switch display system).

  The control means 20 includes a CPU (Central Processing Unit) (not shown), a RAM (Random Access Memory) used for temporary storage of various data, and the like, according to a control program (not shown) stored in the storage means 21. By operating, the overall operation of the projector 1 is controlled. That is, the control unit 20 functions as a computer together with the storage unit 21.

  The storage means 21 is composed of a rewritable nonvolatile memory such as a flash memory or FeRAM (Ferroelectric RAM). The storage unit 21 stores a control program for controlling the operation of the projector 1, various setting data for defining operation conditions of the projector 1, and the like.

  The input operation means 23 includes a plurality of operation keys for the user to give various instructions to the projector 1. The operation keys provided in the input operation means 23 include a power key for alternately switching on / off the power, an input switching key for switching a plurality of image input terminals input to the image signal input means 18, and various settings. There are a menu key for superimposing a setting menu for performing, a cursor key for selecting a setting item from the menu, a determination key, an escape key, and the like.

When the user operates various operation keys of the input operation unit 23, the input operation unit 23 outputs an operation signal corresponding to the operation content of the user to the control unit 20. The input operation means 23 may have a configuration including a remote controller (remote control) signal receiving means (not shown) and a remote controller (not shown) capable of remote operation.
In this case, the remote controller emits an operation signal such as an infrared ray corresponding to the operation content of the user, and the remote control signal receiving means receives this and transmits it to the control means 20 as control information.

  As described above, the image signal input means 18 includes a plurality of image input terminals. From each image input terminal, an image is input from an external device such as a video playback device or a personal computer via a cable or communication device (not shown). Information is entered.

The image signal processing means 17 converts the image information input from the image signal input means 18 into image information representing the gradation of each pixel of the liquid crystal light valves 12R, 12G, and 12B. Here, the converted image information is for each of the R, G, and B color lights, and is composed of a plurality of pixel values corresponding to all the pixels of the liquid crystal light valves 12R, 12G, and 12B.
The pixel value defines the light transmittance of the corresponding pixel, and the intensity (gradation) of light transmitted through each pixel and emitted is defined by this pixel value.

  The OSD processing unit 16 performs processing for superimposing and displaying an OSD (on-screen display) image such as a menu image or a message image on the projection image based on an instruction from the control unit 20. The OSD processing unit 16 includes an OSD memory (not shown), and stores OSD image information representing graphics, fonts, and the like for forming an OSD image.

  When the control unit 20 instructs to superimpose the OSD image, the OSD processing unit 16 reads necessary OSD image information from the OSD memory, and outputs an image signal so that the OSD image is superimposed at a predetermined position on the projected image. The OSD image information is synthesized with the image information input from the processing means 17. The image information combined with the OSD image information is output to the liquid crystal driving means 14. When there is no instruction to superimpose the OSD image from the control unit 20, the OSD processing unit 16 outputs the image information input from the image signal processing unit 17 to the liquid crystal driving unit 14 as it is.

  When the liquid crystal driving unit 14 drives the liquid crystal light valves 12R, 12G, and 12B according to the image information input from the OSD processing unit 16, the liquid crystal light valves 12R, 12G, and 12B form images corresponding to the image information, An image is projected from the projection lens 13.

The power supply unit 31 is supplied with electric power such as AC 100V from the outside via the power supply terminal 30. The power supply unit 31 converts input power (AC power) into predetermined DC power and supplies the power to each unit of the projector 1.
In addition, the power supply unit 31 stops supplying power (operating power) necessary for image projection to each unit (power-on state) and operating power supply based on an instruction from the control unit 20. It is possible to switch between a state (standby state) of waiting for an operation for turning on.

  The light source control unit 25 controls the supply and stop of power to the light source 11 based on an instruction from the control unit 20 and switches between turning on and off the light source 11.

  The shutter position detection means 15 includes a photo sensor, a magnetic sensor, a mechanical switch, and the like, and the position when the shutter 4 is slid with the operation knob 4a is any of the fully open position, the projection lens open position, or the closed position. And the detection result is output to the control means 20.

  Next, the operation of the projector 1 according to the present embodiment will be described with reference to the flowcharts of FIGS. 3 and 4.

[Operation when the movement of the shutter 4 is detected]
FIG. 3 is a flowchart showing the operation when the movement of the shutter 4 is detected during the operation of the projector 1.
As shown in FIG. 3, in step S <b> 101, the shutter position detection unit 15 confirms that the position of the shutter 4 has moved to any one of the fully opened position, the projection lens opened position, and the closed position during the operation of the projector 1. To detect. This step S101 corresponds to a shutter position detection step.

  When the position movement is detected in step S101, the control unit 20 checks whether the shutter 4 has moved to the closed position based on the detection result of the shutter position detection unit 15 (step S102). When the shutter 4 has moved to the closed position (step S102: Y), the process proceeds to step S103. When the shutter 4 has not moved to the closed position (step S102: N), the process proceeds to step S104.

  In step S103, the control unit 20 causes the image projection unit 10 to project an all black image, and the process proceeds to step S107. The all black image is an image indicating an image mute state. In this state, since the shutter 4 closes the opening 3, no image is projected on the screen SC.

  In step S104, the control unit 20 causes the image projection unit 10 to project an image based on the image signal input from the image signal input unit 18, and the process proceeds to step S105.

  In step S105, the control means 20 checks whether or not the shutter 4 has moved to the projection lens open position. When the shutter 4 has moved to the projection lens open position (step S105: Y), the process proceeds to step S106. If the shutter 4 has not moved to the projection lens open position (step S105: N), the process proceeds to step S107.

In step S <b> 106, the control unit 20 superimposes a message M <b> 1 as a first image indicating that the focus adjustment and zoom adjustment operations are locked (prohibited) on the image projected by the image projection unit 10. The projection is performed, and the process proceeds to step S107. This step S106 corresponds to a first image projection step.
An example of an image in which the message M1 at this time is projected is shown in FIG.

  In step S107, the operation flow ends.

[Operation when power-on operation is detected]
FIG. 4 is a flowchart showing an operation when the projector 1 detects a power-on operation during standby (power off).
As shown in FIG. 4, when the projector 1 detects a power-on operation from the input operation unit 23 during standby (power off) (step S201), the control unit 20 checks whether the shutter 4 is in the closed position (step S201). Step S202). When the shutter 4 is in the closed position (step S202: Y), the process proceeds to step S203. If the shutter 4 is not in the closed position (step S202: N), the process proceeds to step S204.

  In step S203, the control means 20 maintains the projector 1 in the standby state or shifts to the standby state.

  In step S204, the control unit 20 turns on the light source 11 by the light source control unit 25, and the process proceeds to step S205.

  In step S205, the control unit 20 causes the image projection unit 10 to project an image based on the image signal input from the image signal input unit 18, and the process proceeds to step S206.

  In step S206, the control means 20 checks whether or not the shutter 4 is in the projection lens open position. When the shutter 4 is in the projection lens open position (step S206: Y), the process proceeds to step S207. If the shutter 4 is not at the projection lens open position (step S206: N), the process proceeds to step S208.

In step S207, the control unit 20 superimposes a message M1 as a first image indicating that the focus adjustment and zoom adjustment operations are locked (prohibited) on the image projected by the image projection unit 10. The projection is performed, and the process proceeds to step S208. This step S207 corresponds to a first image projection step.
An example of an image in which the message M1 at this time is projected is shown in FIG.

  In step S208, projection is started and this operation flow is ended.

  As described above, according to the projector 1 of the present embodiment, by moving the shutter 4 to the projection lens open position, the focus adjustment unit 5 and the zoom adjustment are performed while the opening 3 of the projection lens 13 is kept open. Blocking is performed to prohibit the operation of the unit 6. Thereby, it is possible to prohibit the operations of the focus adjustment unit 5 and the zoom adjustment unit 6 while projecting an image.

  Further, when it is detected that the shutter 4 is in the projection lens open position, the message M1 as the first image indicates that the operations of the focus adjustment unit 5 and the zoom adjustment unit 6 are prohibited. Therefore, by superimposing and projecting the message M1 as the first image, it is possible to notify the user that the focus adjustment and zoom adjustment operations are prohibited.

  Further, since the shutter 4 is housed in a different surface from the exhaust port 7 and the one surface where the opening 3 is provided, even when the exhaust port 7 is provided on the same surface as the opening 3, the shutter 4 is opened when the shutter 4 is fully opened. 4 and the exhaust port 7 can be prevented from interfering with each other.

Moreover, you may change the said embodiment as follows.
(Modification 1)
In the above-described embodiment, the shutter 4 slides between the front surface 2f and the upper surface 2t of the housing 2, but only the projection lens 13 is exposed, and the focus adjustment unit 5 and the zoom adjustment unit 6 are exposed. Can be closed and the shutter 4 and the exhaust port 7 do not interfere with each other, the structure in which the front surface 2f of the housing 2 is slid in the left-right direction, the front surface 2f and the right surface 2r of the housing 2, or the housing 2 A structure in which the shutter 4 slides between the front surface 2f and the left side surface 21 may be used.

6A and 6B are perspective views of the projector 1 according to the first modification. FIG. 6A shows a state where the shutter 4 is in the closed position, and FIG. 1B shows a state where the shutter 4 is in the projection lens open position. c) shows the state when the shutter 4 is in the fully open position.
The first modification has a structure in which the shutter 4 slides between the front surface 2f and the left side surface 21 of the housing 2, and the front surface 2f of the housing 2 and the left side surface 2l adjacent to the front surface 2f have an opening 3. Are formed in a row. The shutter 4 is configured to slide between the front surface 2f of the housing 2 and the left side surface 21 while being bent in a bellows shape, and is housed in the left side surface 21 when fully opened. An operation knob 4a is formed on the shutter 4, and the shutter 4 can be moved while holding the operation knob 4a.
Also in this case, the projection lens 13 is closed so that the operations of the focus adjustment unit 5 and the zoom adjustment unit 6 are prohibited while the opening 3 of the projection lens 13 is kept open. Thereby, it is possible to prohibit the operations of the focus adjustment unit 5 and the zoom adjustment unit 6 while projecting an image.

(Modification 2)
In the above-described embodiment, the focus adjustment unit 5 and the zoom adjustment unit 6 are configured to be operated by manually adjusting the knobs of the focus adjustment ring and the zoom adjustment ring. Alternatively, an electric zoom adjustment mechanism may be configured, and the adjustment operation may be performed electrically by operating the input operation means 23. In this case, when the shutter 4 is in the open position and the closed position of the projection lens, the operation of the input operation unit 23 is disabled to prevent the electric focus adjustment mechanism and the electric zoom adjustment mechanism from being operated. Can do.

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Housing | casing, 3 ... Opening part, 4 ... Shutter, 4a ... Operation knob, 5 ... Focus adjustment part, 6 ... Zoom adjustment part, 7 ... Exhaust port, 10 ... Image projection means, 11 ... Light source, 12R, 12G, 12B ... Liquid crystal light valve (light modulation device), 13 ... Projection lens, 14 ... Liquid crystal driving means, 15 ... Shutter position detecting means, 16 ... OSD processing means, 17 ... Image signal processing means, 18 ... Image signal Input means 20 ... Control means section 21 ... Storage means 23 ... Input operation means 25 ... Light source control means 30 ... Power supply terminal 31 ... Power supply section

Claims (3)

A projector having an image projection unit that modulates light emitted from a light source according to image information, projects projection light onto a projection surface via a projection lens, and forms an image.
A focus adjustment unit for adjusting the focus of the image;
A zoom adjustment unit for adjusting the zoom size of the image;
A shutter that closes at least an opening provided in a housing of the projector so as to face the projection lens, and that blocks the projection light;
Shutter position detecting means for detecting whether the shutter is in a fully open position, a projection lens open position, or a closed position;
Control means for controlling the operation of the projector;
With
The shutter is closed to prohibit operation of the focus adjustment unit and the zoom adjustment unit at the projection lens open position and the closed position,
Wherein, when the shutter by the shutter position detecting means detects that the projection lens open position, projecting a first image by the image projection means,
The projector according to claim 1, wherein the first image is an image indicating that operations of the focus adjustment unit and the zoom adjustment unit are prohibited . The projector according to claim 1 ,
The housing includes an exhaust port on the same surface as the opening,
The shutter is stored on a different surface from the one surface when fully opened.
A projector characterized by that. Image projection means for modulating light emitted from a light source according to image information, projecting projection light onto a projection surface via a projection lens, and forming an image;
A focus adjustment unit for adjusting the focus of the image;
A zoom adjustment unit for adjusting the zoom size of the image;
A shutter that closes at least an opening provided in a housing of the projector so as to face the projection lens, and that blocks the projection light;
A projector control method comprising:
A shutter position detecting step for detecting whether the shutter is in a fully open position, a projection lens open position, or a closed position;
By the shutter position detection step, when the shutter is detected to be in the projection lens open position, the first image projection step for projecting the first image by the image projection means,
I have a,
The first image, the focus adjustment unit, and characterized by image der Rukoto indicating that the operation of the zoom adjustment unit is prohibited, the control method of the projector.

Images