WO2005022904A1 - 映像表示システムおよびその方法 - Google Patents
映像表示システムおよびその方法 Download PDFInfo
- Publication number
- WO2005022904A1 WO2005022904A1 PCT/JP2004/012591 JP2004012591W WO2005022904A1 WO 2005022904 A1 WO2005022904 A1 WO 2005022904A1 JP 2004012591 W JP2004012591 W JP 2004012591W WO 2005022904 A1 WO2005022904 A1 WO 2005022904A1
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- WIPO (PCT)
- Prior art keywords
- image
- display device
- video display
- video
- display
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R11/02—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
- B60R11/0229—Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for displays, e.g. cathodic tubes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0001—Arrangements for holding or mounting articles, not otherwise provided for characterised by position
- B60R2011/0003—Arrangements for holding or mounting articles, not otherwise provided for characterised by position inside the vehicle
- B60R2011/0012—Seats or parts thereof
- B60R2011/0017—Head-rests
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/0043—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for integrated articles, i.e. not substantially protruding from the surrounding parts
- B60R2011/0045—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means for integrated articles, i.e. not substantially protruding from the surrounding parts with visible part, e.g. flush mounted
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R11/00—Arrangements for holding or mounting articles, not otherwise provided for
- B60R2011/0042—Arrangements for holding or mounting articles, not otherwise provided for characterised by mounting means
- B60R2011/008—Adjustable or movable supports
- B60R2011/0085—Adjustable or movable supports with adjustment by rotation in their operational position
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
- H04N5/655—Construction or mounting of chassis, e.g. for varying the elevation of the tube
Definitions
- the present invention relates to a video display system for displaying a video such as a movie or a television broadcast, and more particularly to a video display system for a vehicle.
- FIG. 1 is an explanatory diagram for explaining the video display system of Patent Document 1.
- the video display system of Patent Document 1 includes a display device 903 including the above-described liquid crystal display.
- the display device 903 is installed on the rear side of the headless portion 902 of the front seat 904 of the automobile with its liquid crystal display facing backward.
- a cushion 901 is provided in front of the headless portion 902. The occupant sitting on the rear seat watches the image displayed on the liquid crystal display of the display device 903 by looking directly at the image.
- the image display system of Patent Document 2 enlarges and projects an image displayed on a liquid crystal display to an occupant's eyeball using an enlargement optical system having a concave mirror. In other words, the occupant views the image displayed on the liquid crystal display as an enlarged virtual image.
- the video display system of Patent Document 2 has a large screen effect.
- the video display system of Patent Document 1 has a problem that the display size of the video is limited to the size of the headless portion 902 and is small, making it difficult to view the video. Also, if the display size is forcibly made larger than the size of the headless portion 902, the interior space of the vehicle will be reduced and the weight of the display device 903 will be increased. Sex is impaired. Further, in the image display system of Patent Document 1, since the distance between the display device 93 and the viewpoint of the occupant is short, the occupant watching the image is easily fatigued and is not suitable for long-time viewing. Furthermore, the image display system of Patent Document 2 has a problem that the image is easily affected by external light and the image becomes difficult to see.
- an object of the present invention is to provide a video display system that displays a large and clear video from a user's viewpoint without reducing the indoor space. I do. Disclosure of the invention
- an image display system is an image display system that displays an image in a space where a seat is arranged.
- An image display device that is embedded in the seat and enlarges an image to be displayed inside, and casts the enlarged image as a virtual image to a user's vision from one surface exposed on the back side of the seat;
- the image display device further comprises: mounting means for rotatably mounting the video display device on the seat so that the direction of the display surface of the display device on which the virtual image is cast is changed.
- the image display system is disposed in an interior space of an automobile having the seat as a front seat.
- the image display device enlarges the image and casts it as a virtual image on the user's sight, thereby making it easier for the user to see the image without narrowing the space where the seats are arranged, for example, the space inside the vehicle. Since the image display device is buried in the seat, the effect of external light can be suppressed to make the image clear. Further, since the mounting means rotatably mounts the image display device on the seat, the user can direct the display surface of the image display device to his / her own viewpoint, and the image can be more easily viewed. When this system is installed in the interior space of a car, a user sitting in the backseat can view large, clear images from his or her viewpoint without feeling tired.
- the video display device may be provided with a grip gripped by a user for manually rotating.
- the user can easily rotate the image display means while holding the grip.
- the video display system may further include a rotation unit configured to rotate the video display device.
- the user can easily rotate the video display unit without touching the video display unit.
- the image display system further includes: a reclining angle detecting unit configured to detect a reclining angle of the seat; and the reclining angle.
- a rotation control unit that controls the rotation unit so that a display surface of the video display device faces a predetermined position according to a detection result of the degree detection unit may be provided.
- the rotation control means controls the rotation means in accordance with the reclining angle to turn the display surface of the video display device to a predetermined position, for example, when the predetermined position is the position of the user's viewpoint, Even if a person sitting on the seat reclines the seat, the user can turn the display surface of the video display device to the position of the user's viewpoint without turning the video display device, thereby improving usability. can do.
- the image display system further includes a display angle detection unit that detects a display angle of a display surface of the image display device with respect to the seat back, and the rotation control unit includes a detection result of the display angle detection unit.
- the predetermined position is specified from the display angle after the rotation and stored, and detected by the reclining angle detecting means.
- the rotating means may be controlled so that the display surface of the video display device faces the stored predetermined position.
- the rotation control means specifies a predetermined position from the display angle after the rotation and stores the specified position, and a person sitting on the seat reclines the seat.
- the rotation control means controls the rotation means to turn the display surface of the video display device to the position, so that the user rotates the video display means in advance to face the display surface of the video display means.
- the position to be set can be set as the position of the user's viewpoint, and usability can be further improved.
- the present invention can also be realized as a video display method for displaying a video.
- FIG. 1 is an explanatory diagram for explaining a conventional video display system.
- FIG. 2A is a configuration diagram showing an arrangement configuration of the video display system according to the embodiment of the present invention.
- FIG. 2B is a state diagram showing an attached state of the video display device.
- FIG. 3 is an explanatory diagram for explaining how the video display device is rotated.
- FIG. 4 is a configuration diagram showing a configuration inside a housing of the video display device.
- FIGS. 5A and 5B are explanatory diagrams for explaining how the above-described video display device displays a virtual image.
- FIG. 5A shows the user's viewpoint, the position of the convex lens, the liquid crystal panel, and the virtual image.
- FIG. 5B is a diagram showing the relationship between the convex lens, the liquid crystal panel, and the virtual image in detail.
- FIG. 6 is a configuration diagram showing a configuration of the display angle detector according to the first embodiment.
- FIG. 7 is a configuration diagram showing an internal configuration of the motor control device of the above.
- 8A, 8B, and 8C are illustrations for explaining how the image display surface of the image display device is maintained at the user's viewpoint even when the front seat is reclined.
- FIG. 8A, 8B, and 8C are illustrations for explaining how the image display surface of the image display device is maintained at the user's viewpoint even when the front seat is reclined.
- FIG. 9 is a flow chart showing the operation of the motor control device of the above.
- FIG. 10 is an external view showing an external appearance of a video display system according to a first modification of the above.
- FIG. 11 is a configuration diagram showing an internal configuration of a video display device according to a second modification of the above.
- FIG. 12 is an explanatory diagram for explaining the shape of the concave mirror according to the second modification of the above.
- FIG. 13 is an explanatory diagram for explaining a state of movement of a liquid crystal panel according to the second modification of the above.
- FIG. 14 is a configuration diagram showing an internal configuration of a video display device according to a third modification of the above.
- FIG. 15 is a configuration diagram showing an internal configuration of a video display device according to a fourth modification of the above.
- FIG. 16 is a configuration diagram showing an internal configuration of a video display device according to a fifth modification of the above.
- FIG. 17 is a configuration diagram showing the internal configuration of a video display device according to a sixth modification of the above.
- FIG. 2A is a configuration diagram showing an arrangement configuration of the video display system according to the embodiment of the present invention.
- This image display system is installed in the interior space of a car and displays a large and clear image according to the viewpoint of the occupant (user) sitting in the rear seat.
- the device 100 and the image display device 100 are rotatably attached to the front seat 1A.
- the two attachment devices 40 and the image are displayed so that the direction of the image display surface of the image display device 100 is changed. Display 1
- a user sitting in a rear seat can manually turn the image display device 100 to turn the image display surface of the image display device 100 to his / her own viewpoint.
- the motor 10 rotates the video display 100 so that the video display is turned on.
- the image display surface of 100 is maintained in a state facing the user's viewpoint.
- the image display device 100 includes a substantially rectangular box-shaped housing 110 containing a magnifying optical system such as a lens, and a housing 1 that covers an opening formed on one surface of the housing 110.
- one surface of the housing 110 on which the grip 130 and the light-transmitting plate 120 are attached is exposed to the rear, and the rotation axis 140 is centered.
- the head dress part 2A It is embedded in the head dress part 2A so that it rotates vertically, and displays the image generated inside the housing 110 to the outside via the light transmitting plate 120. . That is, the above-described image display surface refers to the front surface of the light transmitting plate 120.
- the attachment 40 is made of a metal plate bent in a substantially L-shape.
- a through hole through which the rotating shaft 140 of the image display device 100 is formed is formed at one end of the mounting tool 40, and the mounting tool 40 is mounted at the other end thereof.
- FIG. 2B is a state diagram showing an attached state of the image display device 100.
- the two mounting brackets 40 rotate the image display device 100 in each through hole.
- the housing 110 is inserted through the shaft 140, and the screw passed through the screw hole is screwed to the upper surface inside the headless part 2A.
- the image display device 100 is rotatably mounted on the headless portion 2A.
- FIG. 3 is an explanatory diagram for explaining how the image display device 100 rotates.
- the image display device 100 turns around the rotation axis 140 to change the direction of the image display surface (the front surface of the light transmission plate 120), and the light transmission plate 1 Turns the optical axis of the image displayed via 20 upward or downward.
- the video display device 100 is rotatably attached to the front seat 1A, so that the user of the rear seat can grip the grip and display the video display device 100.
- the image display surface of the image display device 100 can be turned to its own viewpoint, and the image can be easily viewed.
- the video display device 100 is embedded in the headless portion 2A, a clear video can be displayed while suppressing the influence of external light.
- FIG. 4 is a configuration diagram showing a configuration inside the housing 110 of the video display device 100.
- a convex lens 101 and a liquid crystal panel 102 which is a small display element for displaying an image, are provided as an enlargement optical system.
- the convex lens 101 is composed of a plastic lens, a glass lens, a thin and lightweight Fresnel lens, or the like, and is disposed substantially opposite to the light transmitting plate 120.
- the liquid crystal panel 102 is positioned such that the convex lens 101 is sandwiched between the liquid crystal panel 102 and the light transmitting plate 120, and the display surface of the liquid crystal panel 102 is substantially the same as the light transmitting plate 120. They are arranged so that they are parallel and the optical axis of the liquid crystal panel 102 passes through the principal point (center) of the convex lens 101. Further, this liquid crystal panel is arranged such that the convex lens 101 is separated by a distance shorter than the rear focal length of the convex lens 101 described later.
- the image display device 100 having such an enlargement optical system provides the user with the image displayed on the liquid crystal panel 101 as a virtual image enlarged through the translucent plate 120. I do.
- FIG. 5A and FIG. 5B are explanatory diagrams for explaining how the image display device 100 displays a virtual image.
- FIG. 5A is a diagram showing the positional relationship between the user's viewpoint and the convex lens 101, the liquid crystal panel 102, and the virtual image
- FIG. 5B is a diagram showing the convex lens 101, the liquid crystal panel 102, and the like. It is a figure which shows the relationship with a virtual image in detail.
- the distance from the principal point of the convex lens 101 to the liquid crystal panel 102 along the optical axis 106 is indicated as a, and the distance of the convex lens 101
- the distance from the front focal point 105 and the rear focal point 103, that is, the front focal distance and the rear focal distance are each represented by f
- the distance to the virtual image 104 is represented by b
- the user's viewpoint E The distance to is shown as c.
- the angle between the direction from the front focal point 105 of the convex lens 101 to the upper end of the virtual image 104 and the direction of the optical axis 106 is denoted by 0 1
- the angle of the convex lens 101 is The angle between the direction from the principal point toward the upper end of the liquid crystal panel 102 and the direction of the optical axis 106 is shown as 0.
- the distance from the optical axis 106 to the upper end of the liquid crystal panel 102 that is, half the length in the vertical direction of the liquid crystal panel 102 (in the figure, the direction perpendicular to the optical axis 106).
- y f X tan ⁇ 1.
- the distance from the optical axis 106 to the upper end of the virtual image 104 that is, half the length of the virtual image 104 in the vertical direction (perpendicular to the optical axis 106)
- the translucent plate 120 and the convex lens 101 need to be positioned in order for the user to see the entire virtual image 104.
- Sufficient size is required according to c.
- the length in the lateral direction (perpendicular to the plane of FIG. 5A) required for the convex lens 101 and the light transmitting plate 120 is also calculated in the same manner as described above.
- the image displayed on the liquid crystal panel 102 is projected to the user as a virtual image magnified by the convex lens 101, so that the user can
- an image (virtual image) that is farther than the actual position of the liquid crystal panel 102 and larger than the size of the image displayed on the liquid crystal panel 102 can be viewed. That is, In the present embodiment, a large and easy-to-view image can be displayed on the user, and the user's feeling of fatigue due to watching the image can be reduced.
- the configuration of the display angle detector 20 will be described.
- FIG. 6 is a configuration diagram showing the configuration of the display angle detector 20.
- the display angle detector 20 includes a gear 29 that rotates in accordance with the rotation of the rotation shaft 140 of the image display device 100, and an image display device 100 based on the rotation of the gear 29. And a signal output unit 28 for generating and outputting a display angle signal indicating the display angle of the video display surface.
- the signal output section 28 is connected to the resistance wire 23, a power source 21 for applying a predetermined DC voltage to both ends of the resistance wire 23, and one end of the resistance wire 23, which is in contact with the resistance wire 23, to rotate the gear 29. And a voltage detector 22 for detecting a potential difference between the other end of the contact 24 and one end of the resistance wire 3.
- the voltage detecting section 22 detects a voltage corresponding to the rotation of the gear 29.
- the display angle detector 20 outputs a voltage signal detected by the voltage detector 22 as a display angle signal.
- the reclining angle detector 30 has a circuit similar to that of the signal detecting section 28 of the display angle detector 20 and uses a voltage signal that changes according to the reclining angle of the front seat 1A as a reclining angle signal. Output.
- FIG. 7 is a configuration diagram showing the internal configuration of the motor control device 200.
- the motor control device 200 includes a first receiving unit 201, a second receiving unit 204, a control unit 202, and a storage unit 203.
- the first receiving unit 201 receives the reclining angle signal from the reclining angle detector 30 and outputs it to the control unit 202.
- the second receiver 204 receives the display angle signal from the display angle detector 20. This is output to the control unit 202.
- the storage unit 203 has an area for storing a position to which the video display surface of the video display device 100 should face.
- the control unit 202 Based on the display angle signal output from the display angle detector 20 via the second receiving unit 204, the control unit 202 allows the video display device 100 to be turned on manually by the user. When it is determined that the image has been moved, the position to which the image display surface of the image display device 100 faces is specified from the display angle indicated by the display angle signal after the rotation, and the specified position is stored in the storage unit 203. To memorize.
- the position of the user's viewpoint is stored as an initial setting in the storage unit. It is stored in 203.
- the control unit 202 also determines whether or not the reclining angle has changed based on the reclining angle signal output from the reclining angle detector 30 via the first receiving unit 201. When it is determined that a change has occurred, the initial setting position stored in the storage unit 203 is read. Then, based on the read initial setting position and the reclining angle indicated by the reclining angle signal after reclining, the control unit 202 sets the video display surface of the video display device 100 to the initial setting. The position, that is, the rotation direction and the rotation angle of the video display device 100 necessary for turning to the viewpoint of the riser are derived, and the video display device 100 rotates in the rotation direction and the rotation angle. The motor 10 as described above.
- 8A, 8B, and 8C show how the image display surface of the image display device 100 is maintained at the user's viewpoint E even when the front seat 1A is reclined. It is an explanatory view for explaining.
- the user first turns the video display surface of the video display device 100 to his / her own viewpoint E, that is, the optical axis 106 of his / her own.
- the image display device 100 is manually rotated to match the point E.
- the motor control device 200 specifies the initial setting position from the direction of the image display surface of the image display device 100 and stores it.
- the reclining causes the orientation of the video display surface of the video display device 100 to return. Deviates from the user's viewpoint E. That is, the optical axis 106 deviates from the direction from the image display device 100 to the user's viewpoint E.
- a series of operations of the motor control device 200 will be described with reference to FIG.
- FIG. 9 is a flowchart showing the operation of the motor control device 200.
- the motor control device 200 stores a position to which the image display surface of the image display device 100 should face as an initial setting position (step S100).
- the motor control device 200 obtains the reclining angle signal from the reclining angle detector 30 (step S102), and based on the reclining angle signal, returns the reclining angle of the front seat 1A. It is determined whether or not there has been a change (step S104).
- step S104 If it is determined that the change has been made (Y in step S104), the motor control device 200 returns the initial setting position stored in step S100 to the reclining position after the change. Based on the angle, a rotation direction and a rotation angle of the video display device 100 necessary for turning the orientation of the video display surface to the initial setting position are derived (step S106).
- the motor control device 200 drives the motor 10 to rotate the video display device 100 in the rotation direction and the rotation angle derived in step S106. (Step S108).
- the motor control device 200 stores the initial setting position set by the user, and when the front seat 1A is reclined, the image display device 100 To rotate the image display device 100 by driving the motor so that the image display surface of the image 0 faces the initial setting position, the user sets the position of his / her own viewpoint as the initial setting position. If the front seat 1A is reclined, the user does not need to manually turn the video display device 100 even if the front seat 1A is reclined. The image display surface can be maintained in a state facing its own viewpoint.
- FIG. 10 is an external view showing an external appearance of a video display system according to a first modification.
- a video display device 100, a motor 10 and a display angle detector 20 are embedded in a backrest portion of a front seat 1A.
- the image display device 100 when the image display device 100 is embedded in the backrest portion of the front seat 1A, the image display device 100 can be made larger, and a larger image can be provided to the user. Can be displayed.
- FIG. 11 is a configuration diagram showing an internal configuration of a video display device according to a second modification.
- the image display device 100a includes a liquid crystal panel 102, a semi-transmissive mirror 1 1 1 and a concave mirror 1 1 1 2.
- the liquid crystal panel 102, the semi-transmissive mirror _111, and the concave mirror 111 are used for the image displayed on the liquid crystal panel 102 to have an angle of 45 degrees with respect to the semi-transmissive mirror 111. And reflected by the semi-transmissive mirror 1 1 1, further reflected by the concave mirror 1 1 1 2 and transmitted through the semi-transmissive mirror 1 1 1, and the transmitted light passes through the translucent plate 1 20
- the display device 100a is arranged so as to be emitted as a virtual image outside the display device 100a.
- the light of the image displayed on the liquid crystal panel 102 first travels along the first optical path L1 toward the semi-transmissive mirror_1 11. Some of the traveling light is transmitted through the semi-transmissive mirror 1 1 1, and the other is reflected by the semi-transmissive mirror 1 1 1, and the concave mirror 1 1 2 along the second optical path 2 Proceed towards. The light traveling toward the concave mirror 111 is totally reflected by the concave mirror 112 and travels along the third optical path 3.
- the video display device 100a has been described with reference to FIGS.5A and 5B because the concave mirror 112 is optically equivalent to the convex lens 101 in the above embodiment.
- the image displayed on the LCD panel 102 is a virtual image that is farther from the actual position of the LCD panel 102 and is larger than the actual image size.
- the shape of the concave mirror 112 is usually circular, but may be rectangular.
- FIG. 12 is an explanatory diagram for explaining the shape of the concave mirror 111.
- the shape of the concave mirror _ 1 1 2 is circular, as shown in (a) of FIG. 12, in order to reflect all the images displayed in the rectangular area of the liquid crystal panel 102, It is necessary to increase the size of the concave mirror. That is, the circular concave mirror 111 has a portion that does not receive the image of the liquid crystal panel 102. Therefore, as shown in (b) of FIG. 12, the shape of the concave mirror 112 may be rectangular in accordance with the area of the liquid crystal panel 102 that receives an image. As a result, the same effect as described above can be obtained, and the size of the concave mirror 111 can be reduced by eliminating useless portions of the concave mirror 112. As a result, the image display device 110 The size of 0a itself can be reduced.
- liquid crystal panel 102 may be movably disposed.
- FIG. 13 is an explanatory diagram for explaining the state of the movement of the liquid crystal panel 102.
- the liquid crystal panel 102 is disposed movably in a direction along the first optical path L1.
- the liquid crystal panel 102 is moved to the semi-transmissive mirror 111 side, the virtual image viewed by the user is small, and the liquid crystal panel 102 is moved to the side opposite to the semi-transmissive mirror 111.
- the virtual image becomes large. Therefore, the user can freely adjust the size of the virtual image by moving the liquid crystal panel 102.
- FIG. 14 is a configuration diagram showing an internal configuration of a video display device according to the third modification.
- the video display device 100b according to the third modification includes the polarizing plate 113 and the ⁇ 4 wavelength plate 114 in the video display device according to the second modification.
- the polarizing plate 113 transmits only one component of the incident light as polarized light, and the four-wavelength plate 114 rotates the polarization direction by 45 degrees with respect to the incident polarized light. Let it.
- Such a polarizing plate 1 13 and a ⁇ ⁇ 4 wavelength plate 1 14 are provided at a portion where the semi-transmissive mirror 1 1 1 is sandwiched between the concave mirror 1 1 2 and the light transmitting plate 1 20.
- the polarizing plate 113 is disposed so as to be located outside the image display device 100b than the I / 4 wavelength plate 114.
- the polarizing plate 113 receives the incident light, Only one direction component of the incident light is transmitted as polarized light.
- the 1/4 wavelength plate 114 receives the polarized light transmitted through the polarizing plate 113 and rotates the polarization direction of the polarized light by 45 degrees.
- the polarized light whose polarization direction has been rotated in this way is reflected by the concave mirror 1 1 2 via the semi-transmissive mirror 1 1 1, and is again transmitted to the ⁇ / 4 wavelength plate 1 1 4 via the semi-transmissive mirror 1 1 1 Incident.
- the quarter-wave plate 1 14 rotates the polarization direction of the reflected light reflected by the concave mirror 1 1 1 2 further by 45 degrees, and emits the polarized light to the polarizing plate 1 13 side.
- the light whose polarization direction is rotated by 90 degrees with respect to the light transmitted from the outside through the light transmitting plate 120 and the polarizing plate 113 is transmitted from the four-wavelength plate 114 to the polarizing plate. It is incident on 1 1 3.
- the polarizing plate 113 has a property of transmitting only a light component in one direction, and thus does not transmit light whose polarization direction is rotated by 90 degrees.
- FIG. 15 is a configuration diagram showing the internal configuration of a video display device according to a fourth modification.
- the image display device 100c includes a semi-transmissive mirror 116, a semi-transparent concave mirror 115, and a liquid crystal panel 102.
- the semi-transmissive mirror 1 16 and the semi-transmissive concave mirror 1 15 transmit some of the received light and reflect the other part.
- liquid crystal panel 102 and the concave semi-transmissive mirror 115 and the semi-transmissive mirror 116 are arranged between the liquid crystal panel 102 and the semi-transmissive mirror 116. 5 is positioned so that of the light of the image displayed on the liquid crystal panel 102, the light transmitted through the semi-transmissive mirror 116 is emitted outside the image display device 100c as a virtual image. ing.
- the light of the image displayed on the liquid crystal panel 102 first travels along the first optical path L5 toward the semi-transparent concave mirror 115.
- a part of the light going to the semi-transmissive concave mirror 115 passes through the semi-transparent concave mirror 115, and a part of the light is reflected by the semi-transmissive mirror 116.
- the light reflected by the semi-transmissive mirror 115 travels again toward the semi-transmissive concave mirror 115 along the second optical path L6.
- Part of the light traveling toward the semi-transmissive concave mirror 115 is reflected by the semi-transparent concave mirror 115, and travels again to the semi-transmissive mirror 116 along the third optical path Lf.
- Part of the light traveling to the semi-transmissive mirror 116 passes through the semi-transmissive mirror 116 and exits from the light transmitting plate 120 to the outside.
- the image display device 1OOc according to the present modification has the same light as that described with reference to FIGS. 5A and 5B due to the effect of the semi-transparent concave mirror—115. Display the image displayed on the LCD panel 102 to the user as a virtual image that is farther than the actual position of the LCD panel 102 and larger than the actual image size. . Further, in the video display device 100c according to the present modified example, the distortion of the video can be reduced.
- FIG. 16 is a configuration diagram showing an internal configuration of a video display device according to a fifth modification.
- the image display device 100d includes a liquid crystal panel 102 and an eccentric concave mirror 110.
- the eccentric four-sided mirror forms a focal point in a direction inclined by a specific amount with respect to parallel light from the front. Is what you do.
- the light of the image displayed on the liquid crystal panel first travels along the first optical path L8 toward the eccentric concave mirror 117. Then, the light traveling toward the eccentric concave mirror 117 is totally reflected by the eccentric concave mirror 117 and exits from the light transmitting plate 120 along the second optical path L9.
- the image display device 1OOd according to the present modification converts the image displayed on the liquid crystal panel 102 by the same optical processing as described with reference to FIGS. 5A and 5B. Displayed on the user as a virtual image that is farther than the actual position of 2 and larger in size than the actual image size.
- a clearer image can be displayed by suppressing a decrease in the amount of light by not using the transflective mirror.
- FIG. 17 is a configuration diagram showing an internal configuration of a video display device according to a sixth modification.
- This video display device 100e includes a liquid crystal panel 102 and a free-form surface prism 118.
- the free-form prism 1 18 has three surfaces 1 f to 3 f formed at a predetermined angle, and the free-form prism 1 18 is incident using these three surfaces 1 f to 3 f.
- the emitted light is emitted in a predetermined direction.
- the light of the image displayed on the liquid crystal panel 102 travels toward the surface 1 f of the free-form surface prism 1 18 along the first optical path L 10.
- the light traveling toward the surface 1 f enters the free-form surface prism 1 18 from the surface 1 f and is totally reflected by the surface f 2.
- the light reflected on the surface f2 travels along the second optical path L11 and is further totally reflected on the surface f3.
- the light totally reflected on the surface f3 travels along the third optical path L12 and exits from the surface f2 to the outside of the free-form surface prism 118.
- the light emitted from the free-form surface prism 118 to the outside as described above is emitted to the outside of the image display device 1 O O e via the light transmitting plate 120.
- the surface 1 f of the free-form surface prism 1 18 according to the present modification is designed to minimize reflection of light from the liquid crystal panel 102 based on the refractive index and total reflection conditions of the free-form surface prism 118.
- the surface 2 f is formed so that the light incident from the surface 1 f is totally reflected and the light reflected on the surface 3 f travels outside the free-form surface prism 1 18 without being totally reflected.
- the surface f3 is formed at an angle such that the light reflected by the surface 2f is totally reflected. Then, the curved surfaces of the surfaces 2 f and 3 f of the free-form surface prism form the magnifying optical system.
- the video display device 100 e has a free-form surface prism. Due to the magnifying effect of the camera 118, the image displayed on the liquid crystal panel 102 is shifted to the actual position of the liquid crystal panel 102 by optical processing similar to that described with reference to FIGS. 5A and 5B. It is displayed to the user as a virtual image that is farther away and larger than the actual video size. Further, such an image display device 100e can be reduced in size, and when the free-form surface prism 118 is formed of plastic, safety can be improved.
- the video display system according to the present invention has been described using the present embodiment and the modified examples.
- the present invention is not limited to these.
- the motor 10, the display angle detector 20, the motor control device 200, and the reclining angle detector 30 are provided, but even if these components are not provided.
- the object of the present invention can be achieved. That is, since the image display device for displaying a large image as a virtual image is buried in the front seat 1A and rotatably mounted, the user is not affected by external light.
- the image display device can be rotated by gripping the grip 130 of the image display device, and the image display surface can be adjusted to its own viewpoint.
- the image displayed on the liquid crystal panel 102 is directly enlarged by an enlargement optical system such as the convex lens 101 to form a virtual image.
- an enlargement optical system such as the convex lens 101
- the image displayed on the LCD panel 102 is enlarged using a relay optical system to produce an intermediate image.
- the intermediate image may be enlarged by an enlargement optical system to form a virtual image.
- the image displayed on the liquid crystal panel 102 is enlarged in two stages, so that the enlargement ratio can be improved.
- the liquid crystal panel 102 can be reduced in size.
- a position detector for detecting the position of the head of the user is provided, and the image display device is rotated according to the detection result.
- the motor control device 200 specifies the position of the user's viewpoint based on the detection result of the position detector, and drives the motor 10 so that the direction of the image display surface is directed to the position. Is rotated.
- the position detector is configured using an imaging device such as a camera, for example.
- the physical arrangement of each member such as the grip 130 described in the present embodiment and the modified example, the configuration of the display angle detector 20, etc. are examples of the present invention. In the present invention, these are not limited to the present embodiment and modified examples.
- the virtual image is displayed from the image display device. However, without displaying such a virtual image, a clear image can be displayed toward the user's viewpoint. To play.
- the present system is disposed in the space inside a car, but may be disposed inside a train, a pass, or an airplane. Even in such a case, a large and clear image can be displayed according to the user's viewpoint.
- the video display system according to the present invention has an operation effect that a large and clear video can be displayed according to a user's viewpoint without narrowing the indoor space. This is useful as an RSE for displaying images such as broadcasts to occupants in rear seats.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04772547A EP1662782A1 (en) | 2003-08-27 | 2004-08-25 | Image display system and method of producing the same |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-303687 | 2003-08-27 | ||
JP2003303687A JP2005067555A (ja) | 2003-08-27 | 2003-08-27 | 映像表示システムおよび方法 |
Publications (1)
Publication Number | Publication Date |
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WO2005022904A1 true WO2005022904A1 (ja) | 2005-03-10 |
Family
ID=34269243
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/012591 WO2005022904A1 (ja) | 2003-08-27 | 2004-08-25 | 映像表示システムおよびその方法 |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1662782A1 (ja) |
JP (1) | JP2005067555A (ja) |
WO (1) | WO2005022904A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2419022A (en) * | 2004-10-06 | 2006-04-12 | Baton Digital Electronictech C | Rotatable display apparatus for a vehicle |
WO2023125088A1 (zh) * | 2021-12-30 | 2023-07-06 | 比亚迪股份有限公司 | 显示装置、车辆及车辆的控制方法 |
WO2023207695A1 (zh) * | 2022-04-29 | 2023-11-02 | 华为技术有限公司 | 光学显示器、座椅及交通工具 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008279155A (ja) * | 2007-05-14 | 2008-11-20 | Panasonic Corp | 画像表示装置 |
KR100879097B1 (ko) | 2007-07-09 | 2009-01-15 | 현대자동차주식회사 | 자동차 후석 모니터용 안전 장치 |
TW201146004A (en) * | 2010-06-11 | 2011-12-16 | Hannspree Inc | Display device |
JP2014169022A (ja) * | 2013-03-04 | 2014-09-18 | Mitsubishi Electric Corp | モニタ装置 |
GB2513161A (en) * | 2013-04-17 | 2014-10-22 | Bentley Motors Ltd | Display mounting screen |
JP6422650B2 (ja) * | 2014-01-16 | 2018-11-14 | 矢崎総業株式会社 | シート装置 |
CN105984410A (zh) * | 2015-03-04 | 2016-10-05 | 厦门歌乐电子企业有限公司 | 头枕显示屏角度自动调节方法及装置 |
CN108116287B (zh) * | 2017-12-22 | 2020-10-23 | 燕山大学 | 一种多功能无人驾驶电动汽车 |
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JPH02220576A (ja) * | 1989-02-21 | 1990-09-03 | Sony Corp | 液晶ディスプレイ装置 |
JPH02134782U (ja) * | 1989-04-13 | 1990-11-08 | ||
JPH10308906A (ja) * | 1998-05-07 | 1998-11-17 | Olympus Optical Co Ltd | 座席用ディスプレイ装置 |
JP2001356295A (ja) * | 2000-06-13 | 2001-12-26 | Minolta Co Ltd | 接眼光学系 |
JP2002107658A (ja) * | 2000-09-29 | 2002-04-10 | Olympus Optical Co Ltd | 画像観察光学系 |
-
2003
- 2003-08-27 JP JP2003303687A patent/JP2005067555A/ja active Pending
-
2004
- 2004-08-25 WO PCT/JP2004/012591 patent/WO2005022904A1/ja not_active Application Discontinuation
- 2004-08-25 EP EP04772547A patent/EP1662782A1/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH02220576A (ja) * | 1989-02-21 | 1990-09-03 | Sony Corp | 液晶ディスプレイ装置 |
JPH02134782U (ja) * | 1989-04-13 | 1990-11-08 | ||
JPH10308906A (ja) * | 1998-05-07 | 1998-11-17 | Olympus Optical Co Ltd | 座席用ディスプレイ装置 |
JP2001356295A (ja) * | 2000-06-13 | 2001-12-26 | Minolta Co Ltd | 接眼光学系 |
JP2002107658A (ja) * | 2000-09-29 | 2002-04-10 | Olympus Optical Co Ltd | 画像観察光学系 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2419022A (en) * | 2004-10-06 | 2006-04-12 | Baton Digital Electronictech C | Rotatable display apparatus for a vehicle |
WO2023125088A1 (zh) * | 2021-12-30 | 2023-07-06 | 比亚迪股份有限公司 | 显示装置、车辆及车辆的控制方法 |
WO2023207695A1 (zh) * | 2022-04-29 | 2023-11-02 | 华为技术有限公司 | 光学显示器、座椅及交通工具 |
Also Published As
Publication number | Publication date |
---|---|
EP1662782A1 (en) | 2006-05-31 |
JP2005067555A (ja) | 2005-03-17 |
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