JP2006113272A - Video projection device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a video projection device which is divided into a plurality of portions, the video projection device being capable of effectively suppressing vibration of video, making it easier for a passenger to appreciate video, and reducing eye strain that the passenger has. <P>SOLUTION: The video projection device 1 is mounted on a moving body and includes a vibration detecting means 2 which detects vibration of at least one of the moving body and the portions constituting the video projection device 1, a vibration predicting means 3 of predicting future vibration based upon vibration information representing the vibration detected by the vibration detecting means 2, a control means 4 of controlling the video based upon the vibration predicted by the vibration predicting means 3, and a video projecting means 5 of projecting the video controlled by the control means 4. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a video projection device that is mounted on a moving body including a vehicle, an aircraft, a ship, and the like and projects a video.

Conventionally, as an image display device related to this type of video projection device, the image display device is mounted on vehicles such as vehicles, airplanes, and ships, and detects vibrations or sudden position fluctuations of the image display device main body. By calculating the amount of image movement based on abrupt position changes, moving the image according to the calculated amount of movement, and mitigating image shaking when the passenger is watching a video while the vehicle is moving In addition, it is known that the deterioration of visibility with respect to an image is reduced and the eye strain of a passenger is reduced (see, for example, Patent Document 1).
JP 2002-123242 A (11th paragraph)

  However, unlike a live-action image display device such as the conventional image display device described above, a projection-type image display device, that is, a video projection device, is roughly divided into a video projection device body and a screen in two parts. When the mobile body moves with the two parts mounted on the mobile body, each part vibrates individually, which increases the processing load for reducing the deterioration of visibility and is effective. However, there is a problem that the vibration of the image cannot be suppressed.

  The present invention has been made to solve such a problem, and in a video projection device divided into a plurality of parts, even when the processing load for reducing the deterioration of visibility becomes heavy, it is effective. An object of the present invention is to provide an image projection apparatus that can suppress vibration of the image, improve the visibility of the image when the passenger views the image, and reduce eyestrain of the passenger. .

  The video projection device of the present invention is a video projection device mounted on a moving body, and detects vibrations of at least one of the moving body, the video projection device, or each part constituting the video projection device. Detection means; vibration prediction means for predicting future vibration based on vibration information representing vibration detected by the vibration detection means; and control means for controlling video based on the vibration predicted by the vibration prediction means. And image projection means for projecting an image controlled by the control means.

  With this configuration, in order to predict future vibrations based on vibration information representing the detected vibrations and to control the video based on the predicted vibrations, it is effective in a video projection device divided into a plurality of parts. The vibration of the image can be suppressed, the visibility of the image when the passenger views the image can be improved, and the eye strain of the passenger can be reduced.

  The video projection apparatus according to the present invention further includes vibration information storage means for storing the vibration information, and current position detection means for detecting a current position of the moving body, wherein the vibration prediction means stores the vibration information storage. Based on past vibration information corresponding to the current position detected by the current position detection means among vibration information stored in the means, and vibration information representing the vibration currently detected by the vibration detection means, the future It has a configuration for predicting vibration.

  With this configuration, since future vibration is predicted based on past vibration information corresponding to the current position and current vibration information, it is possible to effectively reduce the shaking of the image projected by the image projection apparatus.

  Furthermore, in the video projection device of the present invention, the moving body includes a vehicle, and the vibration detection means detects a vibration of a wheel constituting the vehicle.

  With this configuration, since the vibration of the wheels constituting the vehicle is detected, when the vehicle is traveling, the vibration of the wheels can be detected, and the vibration of the video projection device can be predicted based on the detected vibration.

  Furthermore, the video projection apparatus of the present invention further includes driving operation detection means for detecting a driving operation of the moving body, wherein the vibration prediction means includes vibration information indicating vibration detected by the vibration detection means and the driving operation. The future vibration is predicted based on the driving operation detected by the detecting means.

  With this configuration, future vibrations can be predicted based on the driving operation.

  As described above, the present invention, in the video projection device divided into a plurality of parts, can effectively suppress the vibration of the video, improve the visibility of the video when the passenger views the video, It is possible to provide an image projection apparatus that reduces eyestrain of a passenger.

  Hereinafter, a video projection device according to an embodiment of the present invention will be described with reference to the drawings.

(First embodiment)
FIG. 1 is an apparatus configuration diagram of a video projection apparatus according to a first embodiment of the present invention. As shown in FIG. 1, the video projection device 1 is mounted on a moving body including a vehicle, an aircraft, a ship, and the like, and detects at least one vibration among the parts constituting the moving body and the video projection device 1. The vibration detection unit 2, the vibration prediction unit 3 that predicts future vibration based on vibration information that represents the vibration detected by the vibration detection unit 2, and the video based on the vibration predicted by the vibration prediction unit 3 It is comprised by the control means 4 and the image | video projection means 5 which projects the image | video controlled by the control means 4.

  When the video projection device 1 is mounted on a vehicle, the vibration detection unit 2 includes, for example, a speed sensor that detects acceleration / deceleration of the vehicle or the video projection device 1, an acceleration sensor that detects acceleration of the vehicle or the video projection device 1, It is composed of at least one of an angular velocity sensor for detecting the angular velocity of the vehicle or the video projection device 1 and a shaking sensor for detecting the shaking frequency of the vehicle or the video projection device 1, and the velocity and acceleration sensor detected by the velocity sensor are used. By detecting at least one acceleration of left and right, up and down, and front and rear of the vehicle or the video projection device 1 by at least one of detected acceleration, angular velocity detected by the angular velocity sensor, and shaking frequency detected by the shaking sensor The vibration of the vehicle or the video projection device 1 is detected.

  The vibration prediction means 3 is constituted by, for example, a CPU (Central Processing Unit), a ROM (Read Only Memory), and a RAM (Random Access Memory), and based on vibration information representing vibration detected by the vibration detection means 2, Future vibrations applied to the video projector 1 are predicted.

  The control means 4 is comprised by CPU, ROM, and RAM, for example. The video projection means 5 is constituted by a general projector device.

  The operation of the video projector 1 configured as described above will be described with reference to the drawings. FIG. 2 is a diagram for explaining vibration detected by the video projection apparatus according to the first embodiment of the present invention. The vibration waveform 202 is a waveform representing vibration detected by the vibration detection means 2 and is vibration information. The vibration pattern 201 is a vibration portion of the vibration waveform 202 analyzed by the vibration prediction unit 3.

  First, the vibration detection means 2 detects the vibration represented by the vibration waveform 202 applied to the video projection device 1. Next, the vibration prediction unit 3 analyzes the vibration waveform 202 representing the vibration detected by the vibration detection unit 2, finds the vibration pattern 201 from the vibration waveform 202, and calculates the generation time interval t of the vibration part.

  Based on the vibration pattern 201 and the generation time interval t, the vibration prediction unit 3 generates a vibration portion of the next vibration pattern 201 with respect to the vibration portion of the vibration pattern 201 on the assumption that vibration is generated in a pattern. The time t1 to be calculated is calculated. Further, the vibration predicting unit 3 sends information representing the vibration pattern 201 and the calculated time t1 to the control unit 4.

  The control means 4 calculates the amount by which the video is moved, enlarged, and deformed based on the information representing the vibration pattern 201 sent from the vibration prediction means 3 and the time t1 so as to suppress the vibration of the projected video. When the time t1 is reached, the video projection means 5 is instructed to move, enlarge and deform the video. For example, the control means 4 moves the video in the opposite direction and amount to the vibration generated in the video projection means 5 or increases or decreases the size of the video during the vibration to improve the visibility. The video projection means 5 moves, enlarges, and deforms the video according to an instruction from the control means 4 and projects it onto a screen or the like.

  As described above, the video projection device 1 is divided into a plurality of parts in order to predict future vibration based on vibration information representing the detected vibration and to control the video based on the predicted vibration. In an apparatus for displaying an image, it is possible to effectively suppress vibration of the image, improve the visibility of the image when the passenger views the image, and reduce eye strain.

  Moreover, the video projection apparatus 1 may be implemented in the form described below. For example, when the video projection device 1 is mounted on a four-wheeled vehicle of the vehicle, the vibration detection unit 2 shown in FIG. 1 detects the vibration of the vehicle by detecting the vibration of the wheels constituting the vehicle. It may be. The operation of the video projection apparatus 1 having the vibration detection means 2 for detecting the vibration of the wheel in such a configuration will be described below.

  FIG. 3 is a diagram for explaining the vibration detected by the video projection device 1 and the vibration of the front wheels. First, the vibration detection unit 2 detects, for example, the vibration of the front wheel represented by the vibration waveform 301 of the front wheel and the vibration of the video projection device 1 represented by the vibration waveform 302. Next, the vibration predicting means 3 finds the vibration of the video projection device 1 that has the same pattern as the vibration of the front wheel detected by the vibration detecting means 2, and calculates the time difference t that is the difference between the times when the same vibration occurred. calculate.

  This time difference t may be calculated only once for the first time or may be calculated every time. When calculating each time, the vibration predicting means 3 uses the time difference t calculated when the vibration is detected. Further, the vibration prediction unit 3 may not calculate the time difference t, but may determine the time difference t as a predetermined value in advance and use the predetermined time difference t. When the time difference t is calculated every time, the vibration prediction unit 3 sends the time difference t calculated this time and information indicating the vibration pattern of the front wheels to the control unit 4.

  The control means 4 calculates the amount by which the video is moved, enlarged and deformed based on the information representing the vibration pattern of the front wheels sent from the vibration prediction means 3 and the time difference t so as to suppress the vibration of the projected video. Further, the next vibration occurrence time t1 is calculated, and when the calculated time t1 is reached, the video projection means 5 is instructed to move, enlarge, and deform the video. The video projection means 5 moves, enlarges, and deforms the video according to an instruction from the control means 4 and projects it onto a screen or the like.

  Note that the vibration detection unit 2 may detect the vibration of the rear wheel and the vibration of the video projection device 1. When detecting the vibration of the rear wheel and the vibration of the video projection device 1, the vibration prediction unit 3 analyzes and analyzes the vibration information indicating the vibration of the rear wheel and the vibration of the video projection device 1 detected by the vibration detection unit 2. A vibration pattern is found from the vibration information, a time difference t that is a difference between times when the same vibration has occurred is calculated, and the time difference t calculated this time and information representing the vibration pattern of the rear wheels are sent to the control means 4.

  As described above, since the video projection device according to the first embodiment of the present invention detects the vibration of the wheels constituting the vehicle, the vibration of the wheels is detected and detected when the vehicle is traveling. The vibration of the video projector can be predicted based on the vibration that has been performed.

(Second Embodiment)
FIG. 4 is an apparatus configuration diagram of a video projection apparatus according to the second embodiment of the present invention. As shown in FIG. 4, the video projection device 401 is mounted on a moving body including a vehicle, an aircraft, a ship, and the like, and detects at least one vibration among the parts constituting the moving body and the video projection device 401. The vibration detection means 2, the vibration prediction means 3 that predicts future vibration based on vibration information that represents the vibration detected by the vibration detection means 2, and the video based on the vibration predicted by the vibration prediction means 3. Consists of a control means 4, a video projection means 5 that projects an image controlled by the control means 4, a vibration information storage means 402 that stores vibration information, and a current position detection means 403 that detects the current position of the moving body. Has been.

  Of the means constituting the video projection apparatus according to the second embodiment of the present invention, the same reference numerals are given to the same means as those constituting the video projection apparatus according to the first embodiment. A description thereof will be omitted.

  The vibration information storage unit 402 is constituted by a RAM, for example. The current position detection unit 403 is configured by at least one of a GPS (Global Positioning System), a gyro, a general navigation system, and the like.

  Note that the vibration prediction means 3 includes past vibration information corresponding to the current position detected by the current position detection means 403 among vibration information stored in the vibration information storage means 402 and vibrations currently detected by the vibration detection means 2. Based on the vibration information to be represented, future vibrations applied to each part of the moving body and the video projection device 401 are predicted.

  The operation of the video projection apparatus 401 configured as described above will be described with reference to the drawings.

  First, when the video projection device 401 is mounted on a vehicle, the vibration detection unit 2 detects the vibration of the vehicle or the video projection device 401. When the vibration detection means 2 detects vibration, the current position detection means 403 detects the current position of the vehicle, and sends current position information representing the detected current position to the vibration detection means 2. The vibration detection unit 2 stores the current position information sent by the current position detection unit 403 and the vibration information indicating the detected vibration in a set in the vibration information storage unit 402, so that the vibration information corresponding to the position information is stored. Create a database related to history.

  Next, when the vibration detection unit 2 detects the vibration and the current position detection unit 403 detects the current position of the vehicle, the vibration prediction unit 3 reads the past information corresponding to the position information indicating the position near the current position of the vehicle. Vibration information is read from the vibration information storage means 402. When the read vibration information and the vibration information representing the vibration detected by the vibration detection means 2 coincide with each other, the vibration prediction means 3 together with information representing the future vibration pattern based on the read vibration information, the vibration detection means 2 Is sent to the control means 4 when the next vibration is generated with respect to the vibration detected at present.

  When the read vibration information and the vibration information representing the vibration detected by the vibration detection means 2 do not coincide with each other, the vibration prediction means 3 is as shown in FIG. 2 as in the first embodiment of the present invention. In addition, based on the vibration pattern 201 and the generation time interval t, the time t1 at which the vibration portion of the next vibration pattern 201 occurs with respect to the vibration portion of the vibration pattern 201 may be calculated. When the time t1 at which the vibration portion of the next vibration pattern 201 occurs is calculated, the vibration prediction unit 3 sends information representing the vibration pattern 201 and the calculated time t1 to the control unit 4.

  The control means 4 calculates the amount by which the video is moved, enlarged and deformed based on the information representing the future vibration pattern sent from the vibration prediction means 3 and the generation time so as to suppress the vibration of the projected video. When the time of occurrence is reached, the video projection means 5 is instructed to move, enlarge and deform the video. The video projection means 5 moves, enlarges, and deforms the video according to an instruction from the control means 4 and projects it onto a screen or the like.

  Here, even when the read vibration information and the vibration information representing the vibration detected by the vibration detection means 2 coincide with each other, the vibration prediction means 3 can detect the vibration pattern 201 and the generation time interval t as shown in FIG. Vibration prediction result (hereinafter referred to as the first prediction result) based on the above, and vibration prediction result (hereinafter referred to as the second prediction result based on the previous vibration information corresponding to the position information indicating the position in the vicinity of the current position of the vehicle). The prediction of vibration may be performed based on both of them.

  When performing vibration prediction based on both prediction results, by adding the respective weights to the values corresponding to the first prediction result and the second prediction result, and comparing the added values, A method of selecting either the first prediction result or the second prediction result is conceivable. As the information representing the weight, a method using the reliability of the past vibration pattern can be considered. As a calculation method of the reliability, a method of determining the reliability in accordance with the vibration suppression rate of the video by detecting the degree of vibration of the video controlled by the control unit 4 can be considered.

  As described above, the video projection apparatus according to the second embodiment of the present invention predicts future vibration based not only on the current vibration of the vehicle corresponding to the current position but also on the past vibration of the vehicle. Therefore, the vibration of the image projected by the image projection device 401 can be effectively suppressed.

(Third embodiment)
FIG. 5 is an apparatus configuration diagram of a video projection apparatus according to the third embodiment of the present invention. As shown in FIG. 5, the video projection device 501 is mounted on a moving body including a vehicle, an aircraft, a ship, and the like, and detects at least one vibration among the parts constituting the moving body and the video projection device 501. The vibration detection unit 2, the vibration prediction unit 3 that predicts future vibration based on vibration information that represents the vibration detected by the vibration detection unit 2, and the video based on the vibration predicted by the vibration prediction unit 3 The control unit 4 includes a video projection unit 5 that projects an image controlled by the control unit 4, and a driving operation detection unit 502 that detects a driving operation of the moving body.

  Of the means constituting the video projection apparatus according to the third embodiment of the present invention, the same reference numerals are used for the same means as those constituting the video projection apparatus according to the first embodiment. A description thereof will be omitted.

  The driving operation detection unit 502 includes, for example, a CPU, a ROM, and a RAM, and detects a behavior based on an operation state of the vehicle by the driver of the vehicle. That is, the driving operation detection unit 502 detects, for example, at least one driving operation among a steering wheel operation, an accelerator operation, a brake operation, an engine brake operation, a shift change operation, a winker operation, or a hazard operation by the driver. The vehicle detects at least one of a right / left turn and acceleration / deceleration.

  The operation of the video projector 501 configured as described above will be described with reference to the drawings. FIG. 6 is a diagram for explaining vibration detected by the video projection device 501.

  First, the driving operation detection unit 502 detects at least one behavior among right / left turn and acceleration / deceleration of the vehicle by detecting the driving operation as described above. In the third embodiment of the present invention, it is assumed that the driving operation detection unit 502 detects an increase in the accelerator opening 601 as shown in FIG.

  Next, the vibration detection means 2 detects the vibration represented by the vibration waveform 602 applied to the video projection device 501. Here, the vibration prediction means 3 calculates the time difference t from when the accelerator is opened until the vibration is transmitted based on the information about the accelerator opening 601 detected by the driving operation detection means 502 and the vibration detected by the vibration detection means 2. calculate. The vibration predicting means 3 sends the accelerator opening 601 and the calculated time difference t to the control means 4.

  Note that, similar to the first embodiment of the present invention, this time difference t may be calculated only once or may be calculated every time. When calculating each time, the vibration predicting means 3 uses the time difference t calculated when the vibration is detected. Further, the vibration prediction unit 3 may not calculate the time difference t, but may determine the time difference t as a predetermined value in advance and use the predetermined time difference t. When calculating the time difference t every time, the vibration prediction means 3 sends the time difference t calculated this time and the accelerator opening 601 to the control means 4.

  The control means 4 calculates the amount by which the video is moved, enlarged and deformed based on the accelerator opening 601 sent from the vibration prediction means 3 and the calculated time difference t so as to suppress the vibration of the projected video. Then, immediately before the time difference t elapses from when the driving operation detection unit 502 detects an increase in the accelerator opening 601, the video projection unit 5 is instructed to move, enlarge, and deform the image. The video projection means 5 moves, enlarges, and deforms the video according to an instruction from the control means 4 and projects it onto a screen or the like.

  As described above, the video projection apparatus according to the third embodiment of the present invention can predict future vibration based on the driving operation.

  As described above, the video projection device according to the embodiment of the present invention can effectively suppress the vibration of the video in the video projection device divided into a plurality of parts, and the passenger views the video. It is possible to provide an image projection device that can improve the visibility of the image at the time and reduce the eye strain of the passenger, and is mounted on a moving body including a vehicle, an aircraft, a ship, etc. It is useful as a video projection device that projects

Device configuration diagram of a video projection device according to a first embodiment of the present invention The figure for demonstrating the vibration which the video projector which concerns on the 1st Embodiment of this invention detects The figure for demonstrating the vibration which the video projector which concerns on the 1st Embodiment of this invention detects, and the vibration of a front wheel The apparatus block diagram of the video projection apparatus which concerns on the 2nd Embodiment of this invention. The apparatus block diagram of the video projection apparatus which concerns on the 3rd Embodiment of this invention. The figure for demonstrating the vibration which the video projector concerning the 3rd Embodiment of this invention detects

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,401,501 Video projection apparatus 2 Vibration detection means 3 Vibration prediction means 4 Control means 5 Video projection means 201 Vibration pattern 202, 302, 602 Vibration waveform 301 Front wheel vibration waveform 402 Vibration information storage means 403 Current position detection means 502 Driving Operation detection means 601 Accelerator opening

Claims (4)

A video projection device mounted on a moving body,
Vibration detecting means for detecting at least one vibration among the parts constituting the moving body and the video projection device;
Vibration prediction means for predicting the future vibration based on vibration information representing vibration detected by the vibration detection means;
Control means for controlling the video based on the vibration predicted by the vibration prediction means;
An image projection apparatus comprising: an image projection means for projecting an image controlled by the control means. Vibration information storage means for storing the vibration information;
A current position detecting means for detecting a current position of the mobile body;
The vibration predicting means represents past vibration information corresponding to the current position detected by the current position detecting means among the vibration information stored in the vibration information storing means, and the vibration currently detected by the vibration detecting means. The video projection device according to claim 1, wherein the future vibration is predicted based on vibration information. The moving body includes a vehicle,
The video projection device according to claim 1, wherein the vibration detection unit detects vibrations of wheels constituting the vehicle. A driving operation detecting means for detecting the driving operation of the mobile body;
The said vibration prediction means predicts the said future vibration based on the vibration information showing the vibration detected by the said vibration detection means, and the driving operation detected by the said driving operation detection means. Or the image projection apparatus of Claim 2.

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