JP2015004991A - Projector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projector capable of performing focus adjustment easily while achieving reduction of weight and a cost.SOLUTION: A projector 1 which projects to display an image on the basis of input image information includes: a focus adjustment part 341 for performing focus adjustment of a projected image; a guidance screen generation part 87 for generating a guidance screen to assist the focus adjustment of the image by the focus adjustment part 341; and image display means 3 for projecting to display the image and an image of the guidance screen. Accordingly, the focus adjustment of the projected image by the focus adjustment part 341 is easily performed by referring to the guidance screen projected by a projection lens 33.

Description

  The present invention relates to a projector.

  2. Description of the Related Art Conventionally, there is known a projector including a light source device, a light modulation device that modulates a light beam emitted from the light source device according to image information, and forms an image, and a projection optical device that enlarges and projects an image. In such a projector, since the distance from a projection surface such as a screen on which an image is projected is not constant, it is necessary to adjust the focus position of the image as necessary.

  A projector is known in which a lever for adjusting the focus position is exposed to the outside according to such a need (see, for example, Patent Document 1). The projector described in Patent Document 1 includes a projection optical device (projection lens) configured as a combined lens having a lens barrel and a plurality of lenses (first to fourth lens groups) housed in the lens barrel. The lens barrel includes an adjustment cylinder that holds the first group lens. The above-mentioned lever is engaged with this adjustment cylinder, and when the lever is operated, the first group lens advances and retreats, and the focus adjustment of the projected image is performed.

  On the other hand, a projector that automatically adjusts the focus of a projected image is known (see, for example, Patent Document 2). The projector described in Patent Document 2 includes a distance measuring mechanism that measures the distance to the screen, and a lens for focus adjustment based on distance information obtained from the distance measuring mechanism and focus information obtained from the projection lens. Is moved by the focus adjustment mechanism. With these configurations, the projector can automatically adjust the focus of the projected image.

JP 2005-099116 A JP-A-6-27431

However, in the projector described in Patent Document 1, since the user himself / herself operates the lever to adjust the focus of the projection image, when the user's visual acuity is poor, the projection image projected on the screen is in a focused state. Therefore, there is a problem that the focus adjustment of the projected image becomes complicated.
On the other hand, the projector described in Patent Document 2 has a configuration in which focus adjustment is automatically performed by the projector, and it is necessary to provide a focus adjustment mechanism that moves a lens for focus adjustment. For example, a motor or the like can be used as the focus adjustment mechanism. However, the provision of the focus adjustment mechanism increases the weight of the projector and increases the manufacturing cost.

  An object of the present invention is to provide a projector capable of easily performing focus adjustment while achieving weight reduction and cost reduction.

  In order to achieve the above object, a projector according to the present invention projects and displays an image based on input image information, and includes a focus adjustment unit that performs focus adjustment of the projected image, and A guidance screen generating unit that generates a guidance screen for assisting focus adjustment of the image by an operation on the focus adjusting unit; and an image display unit that projects and displays the image and the image of the guidance screen. To do.

  According to the present invention, by referring to the guidance screen displayed by the image display unit, it is possible to easily perform the focus adjustment operation of the projection image performed on the focus adjustment unit. Accordingly, the projector can be reduced in weight and cost as compared with the case where the focus adjustment is automatically performed using a driving unit such as a motor, and the guidance screen image is projected. By operating, it is possible to easily adjust the focus of the image.

In the present invention, the focus adjustment unit is operated in a predetermined direction and a direction opposite to the predetermined direction to perform focus adjustment of the image, and the guidance screen generation unit is configured to match the projected image. It is preferable to generate the guidance screen indicating the operation content of the focus adjustment unit that is in a focused state.
In the present invention, it is preferable that the guidance screen includes an operation direction of the focus adjustment unit in which the projected image is in focus.
Here, examples of the display of the operation direction include a message and a graphic display such as an arrow.
According to the present invention, the operation direction of the focus adjustment unit that brings the projected image into focus is displayed on the guidance screen. By referring to the display, the direction of operation of the focus adjustment unit can be adjusted. It is possible to easily grasp whether the direction is close to the focus state. Therefore, the focus adjustment of the image can be performed more easily.

In the present invention, it is preferable that the guidance screen generation unit generates the guidance screen indicating that the focus of the image is in a focused state.
According to the present invention, since the guidance screen indicates that the projected image is in focus, it is possible to easily determine whether the image is in focus after operating the focus adjustment unit by referring to the display. Can grasp. Therefore, the focus adjustment of the image can be performed more easily.

In the present invention, an image capturing unit that captures the image projected by the image display unit, a captured image captured by the image capturing unit, and a memory that stores at least the captured image captured immediately before the captured image And a determination unit that compares the captured images and determines an operation direction of the focus adjustment unit in which the image is in focus. The guidance screen generation unit includes a determination result of the determination unit. It is preferable to generate the guidance screen based on the above.
According to the present invention, since the determination unit determines the operation direction of the focus adjustment unit that is in focus based on each captured image captured by the imaging unit, the direction in which the focus adjustment unit is operated is detected. There is no need to provide sensors. Therefore, the configuration of the projector can be simplified and an increase in cost can be suppressed.

In the present invention, a detection unit that detects an operation on the focus adjustment unit is provided, and the guidance screen generation unit generates the guidance screen when the detection unit detects that the focus adjustment unit is operated. Is preferred.
According to the present invention, since the guidance screen is projected and displayed when the focus adjustment unit is operated, the guidance screen can be displayed as necessary. Accordingly, the focus adjustment can be performed more easily than when the guidance screen is displayed when a predetermined input operation (for example, input of an operation button for displaying the guidance screen) is performed.
In the present invention, the image display unit may include a detection unit that detects an operation on the focus adjustment unit, and the image display unit may display the guidance screen when the detection unit detects that the focus adjustment unit is operated. preferable.
In the present invention, it is preferable that the guidance screen includes a gauge indicating a focused state of the projected image.

1 is a perspective view showing a projector according to a first embodiment of the invention. The block diagram which shows the internal structure of the projector in the said embodiment. The figure which shows an example of the guidance screen in the said embodiment. 7 is a flowchart showing processing of the projector at the time of focus adjustment in the embodiment. The block diagram which shows the internal structure of the projector which concerns on 2nd Embodiment of this invention. The figure which shows an example of the guidance screen in the said embodiment. 7 is a flowchart showing processing of the projector at the time of focus adjustment in the embodiment.

[First Embodiment]
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment according to the invention will be described with reference to the drawings.
[Projector configuration]
FIG. 1 is a perspective view of a projector 1 according to the present embodiment as viewed from the front side.
As shown in FIG. 1, the projector 1 includes a synthetic resin exterior housing 2 having an overall substantially rectangular parallelepiped shape. A power button 21 for turning on / off the power of the projector 1 is provided on the top surface portion of the exterior housing 2 and a focus adjustment unit 341 as a focus adjustment unit for adjusting the focus of the projected image is exposed. An opening 22 is formed. In addition, the exterior housing | casing 2 may be formed with not only a synthetic resin etc. but with another material, for example, you may comprise with a metal etc.

FIG. 2 is a block diagram showing the internal configuration of the projector 1.
As shown in FIG. 2, the projector 1 includes an image display unit 3, a detection unit 4, an imaging unit 5, a storage unit 6, an image input unit 7, and a control unit 8 that are accommodated in the aforementioned exterior casing 2.
The image display means 3 forms and projects an image according to a drive signal as an input image signal. The image display means 3 includes a light source device 31, a light modulation device 32, and a projection lens 33.

Although not shown, the light source device 31 includes a light source lamp such as a high-pressure mercury lamp and a reflector that is a reflecting mirror, or a solid light source such as an LED, and irradiates the light modulator 32 with a light beam.
Although not shown, the light modulation device 32 includes a liquid crystal panel that modulates a light beam emitted from the light source device 31 to form image light, and a driver that drives the liquid crystal panel according to an input drive signal. Configured. Note that the light modulation device 32 is not limited to a configuration including a liquid crystal panel, and may employ a configuration other than liquid crystal, such as a device using a micromirror.

  The projection lens 33 enlarges and projects the image light formed by the light modulation device 32 onto the projection surface of the screen Sc, whereby the projection image Im is displayed on the screen Sc. The projection lens 33 is configured as a combined lens including a lens barrel 34 (see FIG. 1) having the focus adjusting unit 341 and a plurality of lenses housed in the lens barrel 34. Among these, the plurality of lenses include a focus lens (not shown) that moves forward and backward along the axial direction of the lens barrel 34 and adjusts the focus of the projection image Im. Then, the focus lens is engaged with the focus adjustment unit 341, and when the focus adjustment unit 341 is moved along the circumferential direction of the lens barrel 34, the focus lens advances and retreats along the optical axis of the lens barrel 34. Thereby, the focus of the projection image Im is adjusted.

The detection unit 4 detects an operation of the focus adjustment unit 341 by the user. And the detection means 4 will output a detection signal to the control means 8 mentioned later, if the focus adjustment part 341 is operated.
The imaging means 5 is provided on the front surface of the exterior housing 2 (the surface on which the projection lens 33 is exposed) so that the projection surface of the screen Sc is within the imaging range, and the projection image Im projected by the projection lens 33 on the projection surface. Are captured at predetermined intervals, and the acquired captured image is stored in the storage unit 6. Such an image pickup means 5 can be constituted by a CCD (Charge Coupled Device), or can be constituted by another image pickup apparatus such as a CMOS (Complementary Metal Oxide Semiconductor). Note that the imaging unit 5 captures the projection image Im by removing a guidance screen G, which will be described later, displayed superimposed on the projection image Im.

The storage unit 6 stores the captured image captured by the imaging unit 5 as needed. The storage unit 6 stores various programs and data necessary for processing in the control unit 8 described later. For example, the storage unit 6 stores a guidance display program for causing the control unit 8 to execute a guidance display process to be described later, and stores a guidance screen template displayed in the guidance display process. .
The image input means 7 outputs a packet received from an image output device (not shown) to the control means 8. An image is included in the data portion of such a packet. Further, the image input means 7 similarly outputs the image signal input from another image output device (not shown) to the control means 8.

[Configuration of control means]
The control means 8 is configured as a circuit board on which a CPU (Central Processing Unit) and a storage device are mounted, and controls the entire projector 1. For example, when the focus adjustment of the projection image Im is performed, the control unit 8 causes the screen display unit 3 to display a guidance screen G (see FIG. 3) that assists the focus adjustment. Therefore, the control unit 8 includes an image processing unit 81, a frame memory 82, a drive control unit 83, an operation determination unit 84, an in-focus state determination unit 85, an in-focus direction determination unit 86 as a determination unit, and a guidance screen generation unit 87. It has.

The image processing unit 81 performs reconstruction of a packet input from the image input unit 7 and demodulation of an image signal, and an image included in the packet and an image corresponding to the image signal (hereinafter referred to as “input image”). Are expanded on the frame memory 82.
The frame memory 82 is configured to be capable of storing a plurality of images (frames) for one screen formed by the light modulation device 32 described above. In such a frame memory 82, as described above, an input image by the image processing unit 81 is developed, and a guidance screen image to be described later is written by the guidance screen generation unit 87.
The drive control unit 83 outputs a drive signal corresponding to the image written in the frame memory 82 to the light modulation device 32 and also outputs a control signal for controlling turning on / off of the light source device 31 and the amount of emitted light.

The operation determination unit 84 determines whether or not the focus adjustment unit 341 described above has been operated based on the detection signal input from the detection unit 4.
When the operation determination unit 84 determines that the focus adjustment unit 341 has been operated, the in-focus state determination unit 85 captures the screen Sc based on the captured image captured by the imaging unit 5 and stored in the storage unit 6. It is determined whether or not the image projected above is in focus.
For example, the focus state determination unit 85 acquires a captured image (post-operation image) immediately after the focus adjustment unit 341 is operated from the storage unit 6. Then, the edge component of the post-operation image is extracted by a filter process such as a Laplacian filter process, and the in-focus state of the projection image Im is determined based on the edge component.
Note that the in-focus state of the projected image Im may be determined based on the increase and decrease in the contrast and brightness value between the post-operation image and the captured image (pre-operation image) captured immediately before the post-operation image. Alternatively, the in-focus state may be determined by comparing the post-operation image and the input image corresponding to the post-operation image and developed in the frame memory 82.

The in-focus direction determination unit 86 determines the operation direction of the focus adjustment unit 341 in the in-focus state when the in-focus state determination unit 85 determines that the projection image Im is not in the in-focus state.
For example, the in-focus direction determination unit 86 acquires the post-operation image and the pre-operation image from the storage unit 6 and acquires the edge component of each image by the above-described filter processing. Then, when the strength of the edge component of the post-operation image is higher than the strength of the edge component of the pre-operation image, the in-focus direction determination unit 86 is a direction in which the operation direction with respect to the focus adjustment unit 341 is in a focused state. If it becomes lower, it is determined that the direction opposite to the operation direction is the in-focus state.

FIG. 3 is a diagram illustrating an example of the guidance screen G displayed on the screen Sc when the focus adjustment unit 341 is operated. Specifically, FIGS. 3A and 3B are displayed when the operation direction with respect to the focus adjustment unit 341 is the in-focus direction and when the operation direction is the opposite direction of the in-focus direction, respectively. FIG. 3C is a diagram showing the guidance screen G when in the in-focus state. The in-focus direction is an operation direction of the focus adjustment 341 in which the projected image approaches the in-focus state.
A guidance screen generation unit 87 as a guidance screen generation unit generates an image of the guidance screen G as shown in FIG. 3 on the frame memory 82 based on the determination results by the in-focus state determination unit 85 and the in-focus direction determination unit 86. To generate.

For example, as shown in FIG. 3, the guidance screen G is provided with an in-focus state display portion G1 indicating whether or not the projection image Im is in an in-focus state, and a message display portion G2.
Among these, the focus state display part G1 has a substantially circular shape, and when determined to be in focus based on the determination result by the focus state determination part 85, the lighting state in a predetermined color When it is determined that the in-focus state is not obtained, the light is turned off.
The message display part G2 is a part where a message indicating whether or not the direction in which the focus adjustment part 341 is operated is the in-focus direction is displayed. For example, when the operation is performed in the in-focus direction, “Please operate in the current direction” is displayed as shown in FIG. In addition, when the operation is performed in a direction that is not in the in-focus state, a message “Please operate in the opposite direction” is displayed as shown in FIG. In the in-focus state, as shown in FIG. 3C, a message “focused” is displayed.

[Process during focus adjustment]
Next, processing of the projector 1 at the time of focus adjustment will be described with reference to the flowchart of FIG.
When the power of the projector 1 is turned on by the user, the light modulator 4 forms a light beam emitted from the light source device 3 according to image information, and the projection lens 33 Is projected and the projection image Im is displayed on the screen Sc.
Next, the imaging unit 5 captures the projection image Im at a predetermined interval, and stores the captured projection image Im in the storage unit 6 (step S1).
The detection unit 4 detects whether or not the focus adjustment unit 341 has been operated, and based on the detection result, the operation determination unit 84 determines whether or not it has been operated (step S2).

When the operation determination unit 84 determines that the focus adjustment unit 341 has been operated, the imaging unit 5 acquires the projection image Im after the operation of the focus adjustment unit 341 and stores the acquired projection image Im in the storage unit 6. Store (step S3).
The in-focus state determination unit 85 acquires after-operation images captured by the imaging unit 5 at predetermined intervals from the storage unit 6, and determines whether or not the in-focus state is based on the edge component of the after-operation image. (Step S4).
When the in-focus state determination unit 85 determines that the in-focus state is present, the guidance screen generation unit 87 displays a guidance screen G as shown in FIG. 3C based on the determination result by the in-focus state determination unit 85. An image is generated on the frame memory 82. Then, the drive control unit 83 outputs a drive signal corresponding to the image written in the frame memory 82 to the light modulation device 32, and the image display means 3 displays the guidance shown in FIG. 3C on the projected image Im. OSD (On Screen Display) display in which the screen G is superimposed on the projection image Im for a predetermined time is performed (step S5).

On the other hand, when the in-focus state determining unit 85 determines that the in-focus state is not achieved, the in-focus direction determining unit 86 determines the operation direction of the focus adjusting unit 341 that is in the in-focus state (step S6).
The guidance screen generation unit 87 generates an image of the guidance screen G as shown in FIG. 3A or 3B on the frame memory 82 based on the determination result by the in-focus direction determination unit 86. Then, the drive control unit 83 outputs a drive signal corresponding to the image written in the frame memory 82 to the light modulation device 32, and the image display means 3 displays the guidance shown in FIG. 3A on the projected image Im. OSD (On Screen Display) display with the screen G superimposed is performed (step S7).
After this, it returns to step S1 and repeats step S1-S7 mentioned above.

The projector 1 according to the first embodiment described above has the following effects.
(1) By referring to the guidance screen G displayed by the screen display unit 3, the focus adjustment of the projection image Im by the focus adjustment unit 341 can be easily performed. Accordingly, the projector 1 can be reduced in weight and cost as compared with the case where the focus adjustment is automatically performed using a driving unit such as a motor, and the guidance screen G is projected. To easily adjust the focus of the projection image Im.
(2) Since there is a message display unit G2 indicating whether or not the direction in which the focus adjustment unit 341 is operated is a direction approaching the in-focus state of the projection image Im, the focus adjustment unit can be referred to by referring to this message display. Whether the operation direction of 341 is correct can be easily grasped, and the in-focus state of the projection image Im can be easily adjusted.

(3) Since the in-focus state display unit G1 of the guidance screen G indicates that the projection image Im is in an in-focus state, by referring to the in-focus state display unit G1, after operating the focus adjustment unit 341, It is possible to easily grasp whether or not the projection image Im is in focus. Therefore, the focus adjustment of the projection image Im can be performed more easily.
(4) Since the focus direction determination unit 86 determines the operation direction of the focus adjustment unit 341 in the focused state based on each captured image captured by the imaging unit 5, the focus adjustment unit 341 is operated. There is no need to provide sensors for detecting the direction. Therefore, the configuration of the projector can be simplified and an increase in cost can be suppressed.
(5) Since the guidance screen G is projected and displayed when the focus adjustment unit 341 is operated, the guidance screen G can be displayed as necessary. Therefore, the focus adjustment can be performed more easily than when the guidance screen G is displayed when a predetermined input operation (for example, input of an operation button for displaying the guidance screen G) is performed.

[Second Embodiment]
The projector according to the present embodiment has the same configuration as that of the projector 1 described above. However, in the projector 1, the focus adjustment unit 341 is operated in a direction approaching the in-focus direction or in a direction opposite to the in-focus direction. While the message is displayed on the guidance screen G as to whether or not the operation is being performed, the projector according to the present embodiment acquires the position of the focus adjustment unit 341 and operates the focus adjustment unit 341 in the in-focus direction. The difference is that the direction is displayed on the guidance screen G. In the following description, the same components as those in the above embodiment are given the same reference numerals, and the description thereof is omitted.

FIG. 5 is a block diagram showing an internal configuration of the projector 1A according to the present embodiment.
The projector 1A includes an image display unit 3, a detection unit 4A, an imaging unit 5, a storage unit 6, an image input unit 7, and a control unit 8A housed in the exterior housing 2.
In the present embodiment, the detection unit 4A detects the operation of the focus adjustment unit 341 by the user and also detects the position of the focus adjustment unit 341.
The control unit 8A includes a position acquisition unit 88 in addition to the configuration of the control unit 8 described above.
The position acquisition unit 88 acquires the position of the focus adjustment unit 341 from the detection unit 4A.

  The in-focus direction determination unit 86A acquires the position before operation and the position after operation by the position acquisition unit 88, and determines in which direction the focus adjustment unit 341 is operated. Further, the in-focus direction determination unit 86A acquires the post-operation image captured by the imaging unit 5 at predetermined intervals from the storage unit 6, and determines whether or not the in-focus state is in the in-focus state based on the edge component of the post-operation image. Determine. At this time, if the intensity of the edge component is high, it is determined that the operation direction is a direction approaching the in-focus position, and if the intensity of the edge component is low, it is determined that the operation direction is a direction away from the in-focus position. . Therefore, the in-focus direction determination unit 86A determines that the operation direction is the same as the operation direction when the operation direction is the in-focus direction, and the operation direction when the operation direction is the opposite direction to the in-focus direction. It is determined that the direction is opposite to the direction.

FIG. 6 is a diagram illustrating an example of the guidance screen GA displayed on the screen Sc when the focus adjustment unit 341 is operated. Specifically, FIG. 6A is a diagram in which the operation direction of the focus adjustment unit 341 in the focused state is displayed on the guidance screen GA, and FIG. 6B is a guidance in the focused state. It is a figure which shows screen GA.
The guidance screen generation unit 87A generates an image of the guidance screen GA as shown in FIG. 6 on the frame memory 82 based on the determination results by the in-focus state determination unit 85 and the in-focus direction determination unit 86A.

For example, the guidance screen GA is provided with an operation direction display unit G3 in addition to the above-described focus state display unit G1 and message display unit G2, as shown in FIG.
The operation direction display unit G3 has a pair of arrows indicating left and right, and according to the determination result by the in-focus direction determination unit 86A, one of the arrows is turned on in a predetermined color, and the other arrow is turned off. It becomes a state. Of the pair of arrows, the arrow indicating the left direction indicates that the focus adjustment unit 341 is moved in the left direction to approach the in-focus state. As illustrated in FIG. The arrow indicating indicates that the in-focus state is approached by moving the focus adjustment unit 341 in the right direction. It should be noted that the direction in which the focus adjustment unit 341 can be operated and the direction of the left and right arrows displayed on the operation direction display unit G3 indicate the same direction.

Next, the processing of the projector 1A at the time of focus adjustment in the present embodiment will be described with reference to the flowchart of FIG.
The projector 1A executes steps S1 to S4 described above, and when it is determined in the determination process in step S4 that it is in a focused state, it executes step S5 and is determined not to be in a focused state. At that time, step S8 is executed.
In step S8, the position acquisition unit 88 acquires the position of the focus adjustment unit 341 from the detection unit 4A (step S8).

The in-focus direction determination unit 86A determines in which direction the focus adjustment unit 341 has been operated, and based on the intensity of the edge component of the captured image, determines whether the operation direction is a direction approaching the in-focus position. It is determined that the direction is away from the position. When the operation direction is the in-focus direction, it is determined that the operation direction is the same as the operation direction. When the operation direction is the opposite direction to the in-focus direction, the operation direction is determined to be the opposite direction. (Step S9).
As a result, the guidance screen generation unit 87A generates an image of the guidance screen GA including the operation direction on the frame memory 82, and the drive control unit 83 generates a drive signal corresponding to the image written in the frame memory 82. Output to the light modulation device 32, the image display means 3 displays the guidance screen GA of FIG. 6A on the projection image Im (step S10).
After this, returning to step S1, steps S1 to S5 and S8 to S10 described above are repeated.

According to the projector 1A of the second embodiment described above, in addition to the effects (1) to (5) described in the first embodiment, there are the following effects.
Since the operation direction of the focus adjustment unit 341 in which the projection image Im is in focus is indicated on the operation direction display unit G3 of the guidance screen GA, the focus adjustment unit 341 is referred to by referring to the display of the operation direction display unit G3. It is possible to easily grasp which direction should be operated. Therefore, the focus adjustment of the image can be performed more easily.

[Modification of Embodiment]
The best configuration, method, and the like for carrying out the present invention have been disclosed above, but the present invention is not limited to this.
For example, in each of the embodiments described above, when the focus adjustment unit 341 is operated, the guidance screen G is displayed. However, the guidance screen indicates that the focused state is achieved only when the projection image Im is in the focused state. You may display on G.
In each said embodiment, although the message was displayed on the message display part G2, you may show an operation direction with a figure.

  In the second embodiment, the message display unit G2 is provided on the guidance screen G. However, the focus display unit G1 and the operation direction display unit G3 may be provided without providing the message display unit G2. Moreover, only the focus state display part G1 may be sufficient, and it is good also as only a message display part G2 and the operation direction display part G3.

  Further, a gauge for displaying the focus level may be displayed on the guidance screens G and GA of each of the above embodiments by comparing the input image and the captured image and detecting the edge component. According to this, it is possible to grasp how much the focus adjustment unit 341 needs to be operated to the position where the in-focus state is achieved.

  In each of the above-described embodiments, the detection means 4 and 4A always detect the operation of the focus adjustment unit 341 and detect whether or not the focus adjustment unit 341 has been operated. However, the imaging means 5 does not include the detection means 4 and 4A. It may be detected that the focus adjustment unit 341 has been operated based on a change in the edge component by comparing captured images acquired by imaging as needed.

  The present invention can be used for a projector having a manual focus adjustment function.

  DESCRIPTION OF SYMBOLS 1,1A ... Projector, 3 ... Image display means, 4, 4A ... Detection means, 5 ... Imaging means, 86, 86A ... Focus direction determination part (determination means), 87, 87A ... Guidance screen generation part (guidance screen generation) Means), 341... Focus adjustment section (focus adjustment means), G, GA... Guidance screen.

In order to achieve the object, a projector of the present invention, a focus adjustment unit that performs projecting an image based on input image information and image display means for displaying the focus adjustment of the image projected, the Detecting means for detecting an operation on the focus adjusting means; and a guidance screen generating means for generating a guidance screen for assisting focus adjustment of the image by an operation on the focus adjusting means , wherein the image display means is the detecting means. However, when it is detected that the focus adjusting means is operated, an image of the guidance screen is projected and displayed.
The projector of the present invention detects an operation based on an image display unit that projects and displays an image based on input image information, a focus adjustment unit that adjusts the focus of the projected image, and an operation on the focus adjustment unit. And a guidance screen generating means for generating a guidance screen for assisting the focus adjustment of the image by an operation on the focus adjusting means. The guidance screen generating means includes the detecting means, and the focus adjusting means. When the operation is detected, the guidance screen is generated, and the image display means projects and displays the generated image of the guidance screen.

According to the present invention, by referring to the guidance screen displayed by the image display unit, it is possible to easily perform the focus adjustment operation of the projection image performed on the focus adjustment unit. Accordingly, the projector can be reduced in weight and cost as compared with the case where the focus adjustment is automatically performed using a driving unit such as a motor, and the guidance screen image is projected. By operating, it is possible to easily adjust the focus of the image.
Further, since the guidance screen is projected and displayed when the focus adjustment unit is operated, the guidance screen can be displayed as necessary. Accordingly, the focus adjustment can be performed more easily than when the guidance screen is displayed when a predetermined input operation (for example, input of an operation button for displaying the guidance screen) is performed.

In the present invention, it is preferable that the guidance screen includes a gauge indicating a focused state of the projected image.
In the present invention, the image display means preferably displays the guidance screen superimposed on an image based on input image information.

Claims (8)

A projector that projects and displays an image based on input image information,
Focus adjusting means for adjusting the focus of the projected image;
Guidance screen generation means for generating a guidance screen for assisting focus adjustment of the image by an operation on the focus adjustment means;
An image display means for projecting and displaying the image and the image on the guidance screen. The projector according to claim 1, wherein
The focus adjustment unit is operated in a predetermined direction and in a direction opposite to the predetermined direction, thereby adjusting the focus of the image.
The projector is characterized in that the guidance screen generation unit generates the guidance screen indicating the operation content of the focus adjustment unit in which the projected image is in focus. The projector according to claim 2,
The projector according to claim 1, wherein the guidance screen includes an operation direction of the focus adjustment unit in which the projected image is in a focused state. The projector according to any one of claims 1 to 3,
The projector according to claim 1, wherein the guidance screen generating unit generates the guidance screen indicating that the focus of the image is in a focused state. In the projector according to any one of claims 1 to 4,
Imaging means for capturing the image projected by the image display means;
A storage unit that stores at least a captured image captured by the imaging unit and a captured image captured immediately before the captured image;
A determination unit that compares the captured images and determines an operation direction of the focus adjustment unit in which the image is in focus.
The guidance screen generation means generates the guidance screen based on a determination result of the determination means. The projector according to any one of claims 1 to 5,
Detecting means for detecting an operation on the focus adjusting means;
The guidance screen generation unit generates the guidance screen when the detection unit detects that the focus adjustment unit is operated. The projector according to any one of claims 1 to 6,
Detecting means for detecting an operation on the focus adjusting means;
The image display means displays the guidance screen when the detection means detects that the focus adjustment means has been operated. The projector according to any one of claims 1 to 7,
The guidance screen includes a gauge indicating a focused state of the projected image.

Images