JP2004102010A - Projector device - Google Patents

Abstract

When the correction is completed after performing the torsion correction, the display means displays some kind of information, and informs the installer of the completion of the torsion correction, thereby complicating the operation at the time of installation. And a projector device capable of simplifying installation.
The apparatus includes a projector device main body, a screen tilt detecting means for detecting a screen tilt, a comparing means, and a display means, wherein the comparing means compares detection signals from the screen tilt detecting means, and the comparison result is provided. , The torsion angle with respect to the screen of the projector device body is calculated, and the display means performs display when the torsion angle is a predetermined value.
[Selection diagram] FIG.

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a projector device, and more particularly, to a projector device that forms an image by projecting an optical image on a projection surface such as a screen.
[0002]
[Prior art]
As shown in FIG. 10, the projector device projects an optical image onto a screen 3 from a projection lens 2 provided on the front side of a projector main body 1 and forms an image on the screen 3. .
[0003]
In such a projector device, in a projector of a type in which the projector main body 1 and the screen 3 are separated and independent from each other, since the projector main body 1 and the screen 3 can move freely with respect to each other, the screen 3 is shown in FIG. In such a state where the twist angle θ is generated, there is a possibility of projecting.
[0004]
By the way, the state in which the twist angle θ does not occur as described above, that is, the state in which the screen 3 is at right angles to the optical axis of the projection lens 2 is defined as a state in which the screen 3 faces directly or a state in which the screen 3 has a facing relationship Calling.
[0005]
As shown in FIG. 10, when the screen 3 is not perpendicular to the optical axis of the projection lens 2 provided on the front side of the projector body 1, the projected image is distorted or the left and right This causes a problem that the focus is not focused on the part.
[0006]
Therefore, as shown in FIG. 11, both ends of the projector main body 1 and the screen 3 are connected by strings 4, and the relative positional relationship between the screen 3 and the projector main body 1 is set so that the strings 4 are tightened. Had gone.
[0007]
By such a measure, the projector main body 1 and the screen 3 can be installed in an ideal arrangement with each other, that is, in a state where the projector main body 1 and the screen 3 are in a facing relationship.
[0008]
However, according to such a method, when the distance between the projector main body 1 and the screen 3 is long, it is difficult to determine the positional relationship between the two by the string 4. Further, as shown in FIG. 12, when the seat 5 is provided between the projector main body 1 and the screen 3, it is difficult to perform adjustment using the string 4.
[0009]
In view of such a problem, there has been proposed a projector device which automatically corrects a twist of the projector main body 1 with respect to the screen 3 as shown in FIG.
[0010]
This measures the distance between the projector main body 110 and the screen 3 from two points on the front side of the projector main body 110, corrects the twist angle θ of the projector main body 110 with respect to the screen 3 based on the measurement of these distances, and adjusts the projection lens 111. (See, for example, Patent Document 1).
[0011]
[Patent Document 1]
Japanese Patent No. 2797406 (pages 2-3, FIG. 1)
[0012]
[Problems to be solved by the invention]
However, with such a proposal, the twist angle θ of the projector main body 110 with respect to the screen 3 can be corrected, but since no display is made when the correction is completed, the installer has to determine whether or not the correction has been completed. Cannot be determined, and correction is attempted again.
[0013]
The present invention has been made in view of such a problem, and after performing the torsion correction, when the correction is completed, the display means displays some indication, and the installer has completed the torsion correction. The object of the present invention is to provide a projector device which can eliminate the complexity of the operation at the time of installation and simplify the installation.
[0014]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a projector device main body, a screen inclination detecting means for detecting a screen inclination, a comparing means, and a display means, wherein the comparing means is based on the screen inclination detecting means. The detection signal is compared, a twist angle with respect to the screen of the projector device body is calculated from the comparison result, and the display means is configured to display when the twist angle is a predetermined value.
[0015]
Further, the projector device includes a projector device main body, a screen tilt detecting device for detecting a screen tilt, a comparing device, a twist correcting device, and a display device, wherein the screen tilt detecting device is built in the projector device main body, Calculates the twist angle of the projector device main body with respect to the screen from the comparison result, and the twist correcting device calculates the twist angle of the projector main body with respect to the screen based on the calculated twist angle. After correcting the angle,
The display means may be configured to display when the torsion angle is a predetermined value.
[0016]
The display means is preferably any one of a sounding body, a light emitting body, and a vibrating body, or a combination thereof.
[0017]
Further, the projector device includes a projector device main body, a screen tilt detecting device for detecting a screen tilt, a comparing device, and a torsion correcting device, wherein the screen tilt detecting device is built in the projector device main body, and the comparing device includes a screen tilt device. The detection signal is compared by the detection means, and the torsion angle of the projector device body with respect to the screen is calculated from the comparison result. The torsion correction means corrects the torsion angle of the projector device body with respect to the screen based on the calculated torsion angle. , The output based on the torsion angle and / or the torsion angle may be projected by the projector device body.
[0018]
The display means preferably changes the display mode when the torsion angle is a predetermined value.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
(1st Embodiment)
Hereinafter, a first embodiment according to the present invention will be described with reference to the drawings.
[0020]
As shown in FIG. 1, the projector main body 10 has a substantially box-shaped exterior, and a projection lens 11 forming an optical system is attached to the front side thereof.
[0021]
The projection lens 11 can be advanced and retracted in the optical axis direction by a projection lens extension mechanism (not shown) provided in the projector main body 10.
[0022]
Further, the projector main body 10 has a substantially U-shaped handle 12 on an upper portion thereof, and can be used when the projector main body 10 is moved.
[0023]
Further, the projector main body 10 is mounted on a pedestal 13 which is rotationally driven by a torsion angle correcting drive motor 33 to be described later, and is rotatable by a predetermined angle in a direction indicated by an arrow in the figure.
[0024]
The pedestal 13 includes a turntable 13a and a base 13b. The turntable 13a has support members 15a and 15b for supporting the projector body 10.
[0025]
Reference numeral 14 denotes a display such as a sounding body, a light emitting body, or a vibrating body, which generates sound, light, vibration, or the like when the projector main body 10 and the screen 17 have a facing relationship or a substantially facing relationship. This informs the installer that the torsion correction has been completed or almost completed.
[0026]
On the front side of the projector main body 10 and on the upper left side thereof, an ultrasonic transceiver 19 constituting a screen tilt detecting means is arranged.
[0027]
Similarly, on the upper right side, an ultrasonic transmitter / receiver 21 constituting a screen inclination detecting means is arranged.
[0028]
The ultrasonic transceivers 19 and 21 output information relating to the distance between the projector main body 10 and the screen 17.
[0029]
Next, the configurations of the screen tilt detecting means, the comparing means, and the twist correcting means will be described with reference to FIG.
[0030]
As described above, the screen inclination detecting means includes the ultrasonic transmitters / receivers 19 and 21. Further, the ultrasonic transmitters / receivers 19 and 21 include the ultrasonic transmitters 19a and 21a and the ultrasonic receivers 19b and 21b, respectively. Become.
[0031]
The comparing means includes a counter circuit 28, a reference pulse oscillation circuit 29, and a pulse difference detection circuit 30.
Further, the torsion correction means includes a torsion angle calculation circuit 31, a torsion angle correction motor drive circuit 32, and a torsion angle correction motor 33.
[0032]
The ultrasonic transmitters 19a and 21a are connected to pulse transmission circuits 23 and 25, and the ultrasonic receivers 19b and 21b are connected to pulse reception circuits 24 and 26.
[0033]
The pulse transmitting circuits 23 and 25 and the pulse receiving circuits 24 and 26 are connected to the CPU 27, respectively.
[0034]
The CPU 27 is connected to the counter circuit 28.
[0035]
The counter circuit 28 is connected to a reference pulse oscillation circuit 29 and a pulse difference detection circuit 30. The pulse difference detection circuit 30 is connected to a torsion angle calculation circuit 31, a display drive circuit 37, and a lens extension amount calculation circuit 34. I have.
[0036]
The torsion angle calculation circuit 31 calculates the screen tilt angle θ from the output result of the pulse difference detection circuit 30.
[0037]
The torsion angle calculation circuit 31 calculates the amount of drive of the torsion angle correction motor 33 based on the calculation result, and outputs a predetermined signal to the torsion angle correction motor drive circuit 32.
[0038]
As described above, the torsion angle correction drive motor 33 is driven by the torsion angle correction motor drive circuit 32, and the torsion angle is corrected, that is, the projector body 10 and the screen 17 are corrected so as to have a direct relationship. .
[0039]
Next, the configuration of the display means will be described.
[0040]
The display means includes a display drive circuit 37 and the display 14.
[0041]
The display means driving circuit 37 outputs a predetermined driving signal to the display 14 if the projector main body 10 and the screen 17 are in a facing relationship or a substantially facing relationship from the output result of the pulse difference detecting circuit 30, The display 14 is driven.
[0042]
The display body 14 is specifically a display body such as a sounding body, a light emitting body, or a vibrating body. When the projector body 10 and the screen 17 have a facing relationship or a substantially facing relationship, voice, light, Or, a vibration or the like is generated to inform the installer that the torsion correction is completed or almost completed.
[0043]
On the other hand, the counter circuit 28 is connected to a lens extension amount calculation circuit 34, and the lens extension amount calculation circuit 34 is connected to an autofocus motor drive circuit 35.
[0044]
The autofocus motor drive circuit 35 drives the autofocus motor 36 to perform autofocus.
[0045]
Next, a timing chart of the automatic twist correction of the projector main body 10 having the above-described configuration will be described with reference to FIG.
[0046]
Now, it is assumed that the power of the projector main body 10 is turned on and the installer has set the automatic torsion correction and the auto focus adjustment mode.
[0047]
As shown in FIG. 3, at time t0, the ultrasonic transmitter / receiver 19a and the ultrasonic receiver 19b are activated by the ultrasonic transmitter / receiver switching signal.
[0048]
Then, an ultrasonic pulse is transmitted toward the screen 17 from the ultrasonic transmitter 19a. When this ultrasonic pulse is reflected by the screen 17, the ultrasonic pulse returns to the ultrasonic receiver 19b at the time t1 after the reflection time T1.
[0049]
The CPU 27 detects a time difference T1 between times t0 and t1.
[0050]
The counter circuit 28 measures the reflection time T1 to the screen 17 by taking in and counting the reference pulse from the reference pulse oscillation circuit 29 within the time T1.
[0051]
Between the information L1 on the distance between the projector main body 10 and the screen 17 and the reflection time T1,
L1 = C * T1 / 2
It becomes.
[0052]
Here, C is a constant proportional to the speed of sound.
[0053]
In this manner, the information L1 relating to the distance from the left front surface of the projector body 10 to the screen 17 can be measured.
[0054]
At time t2, the operation of the ultrasonic transmitter 19a and the ultrasonic receiver 19b is stopped, and then the ultrasonic transmitter 21a and the ultrasonic receiver 21b enter an operating state.
[0055]
Then, an ultrasonic pulse is transmitted toward the screen 17 from the ultrasonic transmitter 21a. When this ultrasonic pulse is reflected by the screen 17, the ultrasonic pulse returns to the ultrasonic receiver 21b at time t3 after the reflection time T2.
[0056]
Then, the time T2 from time t2 to t3 is measured in the same manner as T1 described above.
[0057]
When T2 is measured, L2 can be obtained by the following equation.
L2 = C * T2 / 2
In this way, the information L1 and L2 relating to the distance from the left and right front portions of the projector body 10 to the screen 17 are calculated and obtained.
The ultrasonic transmitter / receiver switching signal is for separating the operation states of the respective ultrasonic receivers 19b and 21b so that the ultrasonic receivers 19b and 21b do not affect each other.
[0058]
Next, a flowchart of the present invention will be described with reference to FIG.
As described above, distance information L1 and L2 are detected (step (hereinafter referred to as S) 41). Then, the pulse difference detection circuit 30 compares L1 and L2 (S42), and when the difference exceeds a predetermined value dL, the twist angle calculation circuit 31 calculates the screen twist angle θ according to the comparison result. The calculation is performed (S43), and the torsion angle correction drive motor 33 is driven via the torsion angle correction motor drive circuit 32 to rotate the turntable 13a (S44).
[0059]
That is, the state shown in FIG. 5A is corrected to the state shown in FIG. 5B.
[0060]
In S42, when the difference between L1 and L2 compared by the pulse difference detection circuit 30 is equal to or less than the predetermined value dL, that is, when the projector main body 10 and the screen 17 are substantially facing each other, L1 and L2 are further equal. Are compared (S45), and if they are not equal, the display 14 is driven in the mode A (S46), and the installer is informed that it is in a state of being substantially facing, and the torsion angle calculation circuit 31 calculates the torsion angle θ. The calculation (S43), and subsequently, the drive motor 33 for torsion angle correction is driven (S44).
[0061]
If the result of the comparison in S45 is that L1 and L2 are equal, the projector body 10 and the screen 17 are in a state of facing each other, so that the display 14 is driven in the mode B (S47), and the installer is faced. Then, the lens extension amount calculation circuit 34 calculates the extension amount x of the projection lens 11 from the information on the distance between the projector main body 10 and the screen 17, and based on the extension amount x, the auto focus motor 36 Is performed, and the projection lens 11 is advanced and retracted in the optical axis direction to perform autofocus (S48).
[0062]
(2nd Embodiment)
Hereinafter, a second embodiment according to the present invention will be described with reference to the drawings.
[0063]
Note that the same components are denoted by the same reference numerals, and description thereof will be omitted.
[0064]
In the second embodiment, as shown in FIG. 6, three screen tilt detecting means are provided on the front side of the projector main body 10, and twist correction in the vertical direction (elevation angle, depression angle) is performed as shown in FIG. Display is performed on the display 14 after the end of the torsion correction.
[0065]
The screen tilt detecting means for detecting the vertical twist angle is performed by a combination of the ultrasonic transceiver 19 and the ultrasonic transceiver 22.
[0066]
If the signal processing as described in the first embodiment is performed by this combination, the display is performed on the display 14 after the correction of the torsion in the left-right direction, and then the display is performed on the display 14 after the correction of the torsion in the vertical direction. Perform
[0067]
Then, when all the corrections are completed, the autofocus motor 36 is driven, and the projection lens 11 is moved forward and backward in the optical axis direction to perform the autofocus.
[0068]
(Third embodiment)
Hereinafter, a third embodiment according to the present invention will be described with reference to the drawings.
Note that the same components are denoted by the same reference numerals, and description thereof will be omitted.
[0069]
In the third embodiment, as shown in FIG. 8, the torsion angle of the projector device main body with respect to the screen is corrected, and the output based on the torsion angle and / or the torsion angle is projected on the screen by the projector device. It is.
[0070]
In FIG. 8, the current projection state is blinked or highlighted on the screen from the output based on the twist angle to notify the installer. When the torsion correction has been completed and the camera has been directly confronted, the center display blinks or is highlighted.
[0071]
By doing so, when used together with the display 14 described in the first embodiment, it is possible to more effectively notify the installer of the end of the torsion correction.
[0072]
Next, a flowchart of a third embodiment of the present invention will be described with reference to FIG.
[0073]
As described in the first embodiment, based on the calculated L1 and L2 (step (hereinafter referred to as S) 91), the pulse difference detection circuit 30 compares L1 and L2 (S92), and the difference between these is determined by a predetermined value. When the value exceeds dL, the torsion angle calculation circuit 31 calculates the torsion angle θ of the screen according to the comparison result (S93), and the current projection state corresponding to the torsion angle θ is projected or projected in advance. The blinking display is performed on the displayed image (S94). Subsequently, the torsion angle correction drive motor 33 is driven via the torsion angle correction motor drive circuit 32, and the turntable 13a or the support stand 15a is rotationally driven (step 94). S95).
[0074]
In S92, when the difference between L1 and L2 compared by the pulse difference detection circuit 30 is equal to or less than the predetermined value dL, that is, when the projector main body 10 and the screen 17 are substantially opposed to each other, L1 and L2 are further equal. Are compared (S96), and if they are not equal, the display 14 is driven in the mode A (S97), and the installer is informed that the vehicle is almost facing the user, and the torsion angle θ is calculated by the torsion angle calculation circuit 31. (S93), and then the current projection state according to the torsion angle θ is projected or blinked on an image projected in advance (S94), and then the torsion angle correction drive motor 33 is driven. (S95).
[0075]
If the result of the comparison in S96 is that L1 and L2 are equal, the projector body 10 and the screen 17 are in a state of facing each other, so that the display body 14 is driven in mode B (S98) and faces the installer. In addition to notifying that the projector has been faced, the display indicating that the player has faced the camera is projected or blinked on an image projected in advance (S99), and then the lens is extended from the information on the distance between the projector main body 10 and the screen 17. The amount calculation circuit 34 calculates the extension amount x of the projection lens 11, and based on the extension amount x, drives the autofocus motor 36 to move the projection lens 11 back and forth in the optical axis direction to perform autofocus (S100). ).
[0076]
【The invention's effect】
As described above, according to each aspect of the present invention, the comparison unit performs a calculation regarding the twist angle of the projector main body from the output signal of the screen tilt detection unit disposed on the front side of the projector main body, and based on the calculation result, The torsion angle of the projector body is corrected by using the display unit that generates sound, light, vibration, etc. when the projector body and the screen are in a facing relationship or a nearly facing relationship, and the torsion correction is completed. Or inform the installer that it is almost completed, so that the installer can recognize that the twist correction has been completed, eliminate the complexity of the operation at the time of installation, and simplify the installation. Can be.
[Brief description of the drawings]
FIG. 1 is a perspective view of a projector main body according to a first embodiment.
FIG. 2 is a block diagram of a control circuit of the projector device according to the first embodiment.
FIG. 3 is a timing chart showing a control operation in the first embodiment.
FIG. 4 is a flowchart of a control operation according to the first embodiment.
FIG. 5 is a plan view showing the operation of torsion correction in the first embodiment.
FIG. 6 is a perspective view of a projector main body according to a second embodiment.
FIG. 7 is a side view showing the operation of torsion correction in the second embodiment.
FIG. 8 is a projection image according to a twist angle in the third embodiment.
FIG. 9 is a flowchart of a control operation according to the third embodiment.
FIG. 10 is a plan view showing a twist in an arrangement of a conventional projector device.
FIG. 11 is a plan view showing torsion correction by a string.
FIG. 12 is a side view of the projector device with a seat installed.
FIG. 13 is a perspective view of a conventional projector device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Projector main body 11 Projection lens 12 Handle 13 Pedestal 14 Display means 15 Support member 19 Ultrasonic transceiver 21 Ultrasonic transceiver 23 Pulse transmission circuit 24 Pulse reception circuit 25 Pulse transmission circuit 26 Pulse reception circuit 27 CPU
28 Counter Circuit 29 Reference Pulse Oscillation Circuit 30 Pulse Difference Detection Circuit 31 Torsion Angle Calculation Circuit 32 Torsion Angle Correction Motor Drive Circuit 33 Torsion Angle Correction Motor 34 Lens Extension Amount Calculation Circuit 35 Auto Focus Motor Drive Circuit 36 Auto Focus Motor

Claims (5)

A projector device main body, having a screen inclination detecting means for detecting the screen inclination, a comparing means, and a display means,
The comparing means compares a detection signal from the screen inclination detecting means, and calculates a torsion angle of the projector device main body with respect to the screen from the comparison result,
The display device, wherein the display means performs display when the twist angle is a predetermined value. A projector device main body, having a screen tilt detecting means for detecting the tilt of the screen, a comparing means, a twist correcting means, and a display means,
The screen tilt detection means is built in the projector device main body,
The comparing means compares a detection signal from the screen inclination detecting means, and calculates a torsion angle of the projector device main body with respect to the screen from the comparison result,
The torsion correction unit performs a correction of a torsion angle of the projector device main body with respect to the screen based on the calculated torsion angle,
The display device, wherein the display means performs display when the twist angle is a predetermined value. The projector device according to claim 1, wherein the display means is any one of a sounding body, a light emitting body, and a vibrating body, or a combination thereof. A projector device main body, having a screen tilt detecting means for detecting the tilt of the screen, a comparing means, and a twist correcting means,
The screen tilt detection means is built in the projector device main body,
The comparing means compares a detection signal from the screen inclination detecting means, and calculates a torsion angle of the projector device main body with respect to the screen from the comparison result,
The torsion correcting unit corrects a torsion angle of the projector device main body with respect to the screen based on the calculated torsion angle, and outputs an output based on the torsion angle and / or the torsion angle by the projector device main body. A projector device for projecting. 4. The projector device according to claim 2, wherein the display unit changes a display mode when the twist angle is a predetermined value. 5.

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