WO2017168509A1

WO2017168509A1 - Display device

Info

Publication number: WO2017168509A1
Application number: PCT/JP2016/059896
Authority: WO
Inventors: 伊藤　友二
Original assignee: パイオニア株式会社
Priority date: 2016-03-28
Filing date: 2016-03-28
Publication date: 2017-10-05
Also published as: JPWO2017168509A1; JP6609692B2

Abstract

A display device (1) is provided with a plurality of screens (13a, etc.), and a screen base (12) that holds each screen (13a, etc.) so as to be rotatable around a rotation shaft (13a1, etc.) that is parallel to the display face of the screen (13a, etc.). The display device (1) is further provided with: a rotation driving unit (15) that rotates the screen base (12) around a screen base rotation shaft (14) that is parallel to the rotation shafts (13a1, etc.); and angle maintaining guides (13a2, etc.) and rails (11a, etc.) that maintain the angle of the screens (13a, etc.) with respect to the line of sight when the screen base (12) rotates. The rotation shafts (13a1, etc.) of the screens (13a, etc.) are held by the screen base (12) at intervals in the direction perpendicular to the rotation shafts (13a1, etc.).

Description

Display device

The present invention relates to a display device.

For example, Patent Document 1 describes a display device that can change the display distance of an image. Furthermore, Patent Document 1 describes that a plurality of screens are arranged at intervals.

By the method described in Patent Document 1, it is possible to display a plurality of images at different depth positions to give a sense of depth.

JP 2009-150947 A

However, in the case of the method disclosed in Patent Document 1, each screen can be operated independently, but a movable part is required according to the screen, and the movable part becomes complicated and large.

In the case of the method disclosed in Patent Document 1, since the screens are arranged at intervals, the projection light leaks from between the screens, the viewer feels dazzling, or a slit or the like is observed depending on the viewpoint. End up.

Therefore, in view of the above-described problems, an object of the present invention is to provide a display device that can change the depth position with a simple configuration, for example.

In order to solve the above-described problem, the invention according to claim 1 includes a plurality of screens, a holding unit that rotatably holds the plurality of screens around a first axis parallel to a display surface of the screen, A rotation drive unit that rotates the holding unit around a second axis parallel to the first axis, and a maintenance mechanism that maintains the angles of the plurality of screens with respect to the line of sight when the holding unit rotates, The display device according to claim 1, wherein the first axes of the plurality of screens are held by the holding unit at intervals along a direction perpendicular to the first axes.

It is the front view and side view of the display apparatus concerning 1st Example of this invention. It is the front view and side view at the time of the depth display of the display apparatus shown by FIG. It is a side view of the main-body part and screen base which were shown by FIG. It is explanatory drawing of the variable direction of the depth of the display apparatus shown by FIG. It is explanatory drawing of the display of the image | video projected on the screen shown by FIG. FIG. 2 is an explanatory diagram of how the projected light projected onto the screen illustrated in FIG. 1 is viewed by an observer. It is explanatory drawing of the processing method for displaying on a screen shown by FIG. 1 without a cut | interruption. FIG. 8 is an explanatory diagram showing how an observer sees an image processed by the method described in FIG. 7 on a screen. It is explanatory drawing of the modification of a present Example. It is explanatory drawing of the modification of a present Example. It is an enlarged view of the boundary part of a screen. It is explanatory drawing of the other form of a screen. It is explanatory drawing of arrangement | positioning of the screen shown by FIG. It is a schematic block diagram of the head-up display provided with the display apparatus concerning the 2nd Example of this invention. It is a display example of the head-up display shown in FIG. It is the front view and side view of a display apparatus concerning the 3rd example of the present invention. It is explanatory drawing of the display using the display apparatus shown by FIG. It is a side view of the main-body part and screen base of the display apparatus concerning the 4th Example of this invention. It is explanatory drawing of the state in the case of the plane display of the display apparatus shown by FIG. It is typical sectional drawing of the screen shown by FIG. It is an example of the drive waveform at the time of the depth display of the screen shown by FIG. It is a schematic block diagram of the digital signage apparatus provided with the display apparatus concerning the 5th Example of this invention. It is explanatory drawing which showed the structural example which used the digital signage apparatus shown by FIG. 22 for the showcase.

Hereinafter, a display device according to an embodiment of the present invention will be described. A display device according to an embodiment of the present invention includes a plurality of screens, a holding unit that rotatably holds the plurality of screens around a first axis that is parallel to the display surface of the screen, and a holding unit that has a first axis. A rotation drive unit that rotates about a second axis parallel to the rotation axis, and a maintenance mechanism that maintains the angles of the plurality of screens with respect to the line of sight when the holding unit rotates. And the 1st axis | shaft of a some screen is hold | maintained at the holding | maintenance part at intervals along the direction perpendicular | vertical to this 1st axis | shaft. By doing so, when the holding unit is rotated by the rotation driving unit, the angles of the plurality of screens with respect to the line of sight are maintained by the maintaining mechanism, and thus the respective screens are separated in the depth direction by rotating with respect to the holding unit. Become. Therefore, it is possible to make a transition from a state where there is no sense of depth to a state where there is a sense of depth by only rotating the holding unit, and the depth position can be varied with a simple configuration.

In addition, the rotation drive unit rotates the holding unit, and a plurality of screens are arranged with their display surfaces arranged on the same plane, and a plurality of screens are arranged at intervals. You may make it change to. By doing so, the boundary portion of the screen can be overlapped by the rotation of the holding portion that holds the screen, and slits or the like cannot be seen at the boundary of the screen when viewed from the observer, and projection light is less likely to be directly viewed. Become. Further, it is possible to display both a flat display by a plurality of screens and a display having a depth in which the depth position of each screen is changed.

Further, the rotation driving unit rotates the holding unit so as to transition between a state in which the plurality of screens are arranged so as to overlap each other and a state in which the plurality of screens are arranged at intervals. Also good. In this way, it is possible to display both a substantially planar display in which a plurality of screens are overlapped and a display having a depth in which the depth position of each screen is changed.

The screen may be switchable between a scattering state and a transmission state by applying a voltage. By doing in this way, even if the screens are overlapped, it is possible to display on a plurality of screens by one projector or the like by setting only the screens to be displayed in a scattering state. Further, depth display can be performed by a method such as a depth sampling method.

Further, the maintenance mechanism may include a guide portion provided on the screen and a rail portion on which the guide portion moves. By doing so, even if the holding part rotates, the guide part abuts on the rail part and moves the rail part, so that the angle of the screen with respect to the projection light projected from the projection part can be maintained.

Further, an elevating mechanism that moves the holding unit and the maintenance mechanism up and down may be provided, and the rotation driving unit may interlock the rotation of the holding unit and the movement of the holding unit and the maintenance mechanism by the elevating mechanism. By doing so, the depth degree and the vertical movement of the display position can be linked. Therefore, when displaying in a planar shape, it is possible to display at the bottom and gradually display at the top as the depth increases.

Further, the screen may have an end surface on the adjacent screen side formed in a taper shape, and the end surface formed in the taper shape may overlap the end surface formed in the taper shape of the adjacent screen. By doing so, it is possible to prevent the projection light from leaking from the boundary of the screen.

A display device 1 according to a first embodiment of the present invention will be described with reference to FIGS. As illustrated in FIG. 1 and the like, the display device 1 includes a main body unit 11, a screen base 12, a screen 13, and a rotary shaft driving unit 15. In the description of FIGS. 1 to 4, the arrow x direction is referred to as a width direction, the arrow y direction is referred to as a height direction, and the arrow z direction is referred to as a depth direction.

The main body 11 is formed in a substantially rectangular parallelepiped box shape as shown in FIGS. 1 to 3 and accommodates the screen base 12 and the screen 13. As shown in FIG. 3, the main body 11 is arranged to be inclined by an angle θscreen with respect to the horizontal direction. Therefore, the screen 13 accommodated in the main body 11 is arranged at a predetermined angle with respect to the line of sight of the observer and the projection light incident on the main body 11 from a projector or the like.

The main body 11 is provided with

rail portions

11a, 11b, 11c, and 11d on the inner side surface. The

rail portions

11a and 11b are provided in an arc shape that is convex in the height direction, and the

rail portions

11c and 11d are provided in an arc shape that is concave in the height direction. The

rail portions

11a, 11b, 11c, and 11d are not limited to rails, and may be sliders, grooves, gears, and the like, for example. Further, the main body 11 is provided with a bearing or the like that rotatably holds the screen base rotating shaft 14 between the rail portion 11b and the rail portion 11c.

The screen base 12 is formed in a substantially rectangular frame shape as shown in FIGS. 1 to 3 and the like, and has a hole for rotatably holding a rotation shaft included in the screen 13 (

screens

13a, 13b, 13c, 13d). Have. That is, the screen base 12 functions as a holding unit. Further, the screen base 12 has a screen base rotating shaft 14 erected along the width direction from both side surfaces parallel to the height direction (see FIG. 1 and the like). The screen base rotating shaft 14 is rotatably held by a bearing or the like provided in the main body 11. That is, the screen base rotation axis 14 functions as a second axis parallel to the rotation axis included in the screen 13. The screen base 12 has

notches

12a, 12b, 12c, and 12d that receive the angle maintaining guides 13a2, 13b2, 13c2, and 13d2 when

screens

13a, 13b, 13c, and 13d, which will be described later, are arranged on the same plane. Is formed.

In the case of the configuration shown in FIG. 3 and the like, the intervals between the rotary shafts 13a1, 13b1, 13c1, and 13d1 are the same and are arranged in a straight line. That is, the center of the screen base rotary shaft 14 to the rotary shafts 13b1 and 13c1 are arranged at the same distance β, and the center of the screen base rotary shaft 14 to the rotary shafts 13a1 and 13d1 are arranged at the same distance α. If the interval between the rotary shaft 13d1 and the rotary shaft 13c1 is A, the interval between the rotary shaft 13c1 and the rotary shaft 13b1 is B, and the interval between the rotary shaft 13b1 and the rotary shaft 13a1 is C, then A: B: C = (α−β ): 2β: (α−β), and if α = 3 and β = 1, then a: b: c = 1: 1: 1. It should be noted that the screen interval is preferably equal from the viewpoint of ease of device design, but may not be equal.

The screen 13 includes four

screens

13a, 13b, 13c, and 13d. The screen 13a is formed of a transparent screen such as a microlens array or a light scattering sheet, and is formed in a rectangular shape. As for the screen 13a, the rotating shaft 13a1 is standingly arranged from the side surface of the transversal direction. It functions as this rotating shaft 13a1. Further, the screen 13a is provided with an angle maintaining guide 13a2 as a guide portion that comes into contact with the rail portion 11a described above on the side surface in the short direction. The angle maintaining guide 13a2 is configured by a member corresponding to the configuration of the rail portion such as a bearing or a gear. The

screens

13b, 13c, and 13d have the same configuration. In the present embodiment, the

screens

13a, 13b, 13c, and 13d are strip-shaped, but may be other rectangular shapes such as a square.

The

screens

13a, 13b, 13c, and 13d are held on the screen base 12 by rotating shafts 13a1, 13b1, 13c1, and 13d1 in a straight line with a predetermined interval. That is, it is held by the screen base 12 (holding portion) with an interval along the direction perpendicular to the first axis.

The rotary shaft drive unit 15 is provided at the end in the width direction of the main body 11 in order to drive the screen base rotary shaft 14 to rotate. The rotation drive unit 15 is composed of mechanical parts such as a motor and a gear for transmitting the rotation of the motor to the screen base rotation shaft 14.

Next, a method for changing from flat display to depth display of the display device 1 having the above-described configuration will be described with reference to FIG. 4A shows the arrangement of the screen 13 in the case of flat display, FIG. 4B shows the arrangement of the screen 13 in the case where the degree of depth is an intermediate level, and FIG. 4C shows the case where the degree of depth is the maximum level. The arrangement of the screen 13 is shown. In FIG. 4, the description of the screen base 12 is omitted.

First, in the case of flat display, as shown in FIG. 4A, the

screens

13a, 13b, 13c, and 13d are aligned on a straight line and the display surfaces are on the same plane. When the screen base 12 is rotationally driven by the rotary shaft drive unit 15 and the screen base 12 is rotated by θlayer1 from the state of FIG. 4A, the rotary shaft of the rotary shaft 13a1 of the screen 13a is also rotated by θlayer1. To do. Then, since the angle maintaining guide 13a2 moves along the rail portion 11a, the screen 13a moves while maintaining the angle with the horizontal plane in FIG. The

screens

13b, 13c, and 13d move in the same manner. In this way, the

screens

13a, 13b, 13c, and 13d are arranged at intervals in the depth direction.

Next, when the screen base 12 further rotates from the state of FIG. 4B and rotates from FIG. 4A by θlayer2 (θlayer1 <θlayer2), the rotation axis of the rotation axis 13a1 of the rotation axis 13a1 of the screen 13a is also only θlayer2. Rotate. Then, since the angle maintaining guide 13a2 further moves along the rail portion 11a, the screen 13a further moves while maintaining the angle with the horizontal plane in FIG. The

screens

13b, 13c, and 13d move in the same manner. In this way, the

screens

13a, 13b, 13c, and 13d are arranged at a further interval in the depth direction than in FIG. 4B. By doing so, the

screens

13a, 13b, 13c, and 13d are arranged at different positions in the depth direction, so that display with a depth can be performed. In addition, the configuration of this embodiment makes it possible to adjust the depth position of the screen steplessly.

As is apparent from the above description, the angle maintaining guides 13a2, 13b2, 13c2, and 13d2 and the

rail portions

11a, 11b, 11c, and 11d are projectors or the like when the screen base 12 (holding portion) rotates. It functions as a maintenance mechanism that maintains the angles of the plurality of

screens

13a, 13b, 13c, and 13d with respect to the projection light projected from the projection unit. Further, the rotation drive unit 15 rotates the screen base 12 (holding unit), and each of the plurality of

screens

13a, 13b, 13c, and 13d is arranged in a state where the respective display surfaces are arranged on the same plane. Transition to a state in which the display screens are arranged at intervals.

Next, video display using the display device 1 having the above-described configuration will be described with reference to FIGS. FIG. 5 is an explanatory diagram of display of an image projected on the screen 13. In FIG. 5, only the

screens

13a, 13b, 13c, and 13d are shown and simplified. As shown in FIG. 5, images are projected on the

screens

13a, 13b, 13c, and 13d from a projector or the like as a projection unit. At this time, the display device 1 is arranged such that the light beam of the projection light always strikes (overlaps) one or more screens so that the projection light does not leak between the

screens

13a, 13b, 13c, and 13d.

FIG. 6 shows how the projected light projected on the screen 13 is seen by the observer. FIG. 6A shows the display state of the screen viewed from the side on which the projection light is projected, and FIG. 6B shows how the screen is viewed from the observer in FIG. When projection light is projected onto the

screens

13a, 13b, 13c, and 13d as shown in FIG. 6A, the observer shown in FIG. 5 looks like FIG. 6B and feels the depth. Display.

Next, the images displayed on the

screens

13a, 13b, 13c, and 13d will be described. As described above, the

screens

13a, 13b, 13c, and 13d are arranged so that the projection light from the projector or the like is not leaked, so that the viewer can see the

screens

13a, 13b, 13c, and 13d in the short direction. The ends overlap. Therefore, when the video displayed on each of the

screens

13a, 13b, 13c, and 13d is simply divided by the number of screens, the video appears to be missing at the screen boundary. Therefore, in this embodiment, the original video is processed and displayed. A processing method will be described with reference to FIGS.

The original video in Fig. 7 is the video before processing. The end of the entire video period is deleted from the original video, so that it becomes a processed video. Of the processed video, a video period displayed on each screen is an occupation period, and a period corresponding to a portion deleted from the original video is a superposition period.

The superimposition period is a period that is inserted between the occupied periods, which are video periods displayed on each screen, in the projected video (video output to a projector or the like). In the superimposition period, a period during which the light beam of the projection light is applied to the screen on the back side when viewed from the observer and is not visible from the observer is set as a switching period, and processing such as turning off the video or inserting a black image is performed. The remaining period obtained by subtracting the switching period from the superimposition period is an adjustment period for the line-of-sight shift.

In this adjustment period, the same image as the head part of the occupation period after the adjustment period is displayed. For example, on the screen displaying the uppermost part of the video in FIG. 7, the video corresponding to the occupation period a and the adjustment period ab is projected. By doing in this way, as shown in FIG. 8, the image | video which an observer sees disappears, and it can display without a cut | interruption.

9 and 10 show a modification of the display device 1. FIG. 9 shows an example in which the lengths in the height direction of the screen 13 are different. 9 and 10, the description of the screen base 12 is omitted as in FIG. 9, the

screens

13a and 13b are the same as those in FIG. 4 and the like, but the screen 13e is longer in the height direction than the

screens

13a and 13b. Even in this case, as shown in FIGS. 9A and 9B, it is possible to make a transition between a state in which the display surfaces are aligned on the same plane and a state in which the display surfaces are arranged at an interval in the depth direction. .

FIG. 10 shows an example in which the screen base rotating shaft 14 is provided at the end of the screen base 12 (the lower left end in the drawing). In this case, the arrangement of the rail portion provided in the main body portion 11 is changed, and the rail portion 11e corresponding to the screen 13a, the rail portion 11f corresponding to the screen 13b, the rail portion 11g corresponding to the screen 13c, and the screen 13d are changed. Corresponding rail portions 11h are provided. Each

rail part

11e, 11f, 11g, 11h is provided in the circular arc shape convex in the height direction. Even in this case, as shown in FIGS. 10 (a) and 10 (b), it is possible to make a transition between a state where the display surfaces are aligned in a straight line and a state where the display surfaces are arranged in the depth direction. .

According to the present embodiment, the display device 1 includes the

screens

13a, 13b, 13c, and 13d and the screen 13a centering on the rotation axes 13a1, 13b1, 13c1, and 13d1 parallel to the display surfaces of the

screens

13a, 13b, 13c, and 13d. , 13b, 13c, and 13d, each of which has a screen base 12 that rotatably holds the screen. The display device 1 further includes a rotation drive unit 15 that rotates the screen base 12 around a screen base rotation shaft 14 that is parallel to the rotation shaft 13a1 and the like, and when the screen base 12 rotates, the

screens

13a, 13b, 13c, and 13d. Angle maintaining guides 13a2, 13b2, 13c2, 13d2 and

rail portions

11a, 11b, 11c, 11d for maintaining the angles of the

screens

13a, 13b, 13c, 13d with respect to the line of sight. The rotating shafts 13a1, 13b1, 13c1, and 13d1 of the

screens

13a, 13b, 13c, and 13d are held by the screen base 12 at intervals in a direction perpendicular to the rotating shafts 13a1, 13b1, 13c1, and 13d1. By doing so, the

screens

13a, 13b, 13c, and 13d maintain the angle with respect to the projection light projected from the projector or the like by the angle maintaining guides 13a2, 13b2, 13c2, and 13d2 and the

rail portions

11a, 11b, 11c, and 11d. As a result, the screen is rotated with respect to the screen base 12, and the

screens

13a, 13b, 13c, and 13d are separated in the depth direction. Therefore, it is possible to make a transition from a state where there is no sense of depth to a state where there is a sense of depth by only rotating the holding unit, and the depth position can be varied with a simple configuration.

Further, since the intervals between the

screens

13a, 13b, 13c, and 13d are changed steplessly by simply rotating the screen base 12, it is possible to change the depth feeling steplessly. Therefore, the depth feeling can be changed smoothly.

The rotation driving unit 15 rotates the screen base 12 so that the display surfaces of the

screens

13a, 13b, 13c, and 13d are arranged on the same plane, and the

screens

13a, 13b, 13c, A transition is made to a state in which each of 13d is arranged at an interval. By doing so, the boundary portions of the

screens

13a, 13b, 13c, and 13d can be overlapped by the rotation of the screen base 12 that holds the

screens

13a, 13b, 13c, and 13d. , 13c and 13d cannot be visually recognized at the boundary between them, and the leakage light of the projection light is less likely to be directly viewed. Further, it is possible to display both a flat display by the

screens

13a, 13b, 13c, and 13d and a display having a depth in which the depth positions of the

screens

13a, 13b, 13c, and 13d are changed. .

Further, an angle maintaining guide 13a2 and the like provided on the screen 13a and the like, and a rail portion 11a and the like on which the angle maintaining guide 13a2 and the like move are provided. By doing so, even if the screen base 12 rotates, the angle maintaining guide 13a2 etc. abuts on the rail portion 11a etc. and moves the rail portion 11a etc., so the screen 13a against the projection light projected from the projector etc. Etc. can be maintained.

In the embodiment described above, the end face of the screen that becomes the boundary between the screens may be formed in a tapered shape (tapered surface) so that the tapered surfaces overlap each other. FIG. 11 shows an example of the boundary between the screen 13a and the screen 13b. In FIG. 11, the end surface 13a3 of the screen 13a and the end surface 13b3 of the screen 13b are tapered and overlap each other. By doing so, it is possible to prevent the projection light from leaking from the gap between the boundaries of the screen in the flat display state.

Further, the screen is not limited to a screen in which an image is projected from the projection unit and may be a self-luminous display such as an EL (Electro-Luminescence) display. Furthermore, the shape of the screen is not limited to a rectangle, and may be a free form as shown in FIG. The screen shown in FIG. 12A is composed of three

screens

13j, 13k, and 13l, and is disassembled as shown in FIG. 12B. As shown in FIG. 12B, each screen has a shape other than a rectangle. In the example shown in FIG. 12, it is assumed that it is used for a head-up display of a vehicle, and a meter or the like is displayed on the right side, and various information such as guidance information and alerting is displayed on the left side.

Even with the shape as shown in FIG. 12, the plane state as shown in FIG. 12A and the interval as shown in FIG. 13 are separated by the screen base 12 and the rail portion 11a of the main body 11 described above. It is possible to transit between the states to be arranged.

Next, a display device according to a second embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

The present embodiment is an example in which the display device 1 described above is applied to a head-up display. As shown in FIG. 14, the head-up display 100 includes a display device 1, a field lens 2, a projector 3, a mirror 4, a screen control device 5, a video control device 6, and a combiner 7. It is mounted on vehicles such as.

The field lens 2 condenses the emitted light from the display device 1 in the direction of the combiner 7.

The projector 3 as a projection unit projects an image to be displayed as a virtual image using, for example, an LED (light emitting diode) or a laser as a light source onto the screen 13 of the display device 1 via the mirror 4.

The mirror 4 reflects the projection light projected from the projector 3 toward the display device 1.

The screen control device 5 controls the motor that constitutes the rotary shaft drive unit 15 under the control of the video control device 6 and controls switching between flat display and depth display.

The video control device 6 generates a video to be displayed as a virtual image or acquires it from the outside, performs the processing described with reference to FIG. A control signal is output to the screen control device 5 in accordance with the generated video.

The combiner 7 is provided on, for example, a windshield (also referred to as a windshield) of an automobile, and reflects the emitted light (image light) from the field lens 2 toward the observer.

In the head-up display 100 described above, an image output from the image control device 6 is projected as image light from the projector 3, reflected by the mirror 4, and projected onto the screen 13 of the display device 1. The image projected on the screen 13 is reflected toward the observer by the combiner 7 through the field lens 2, so that the observer can visually recognize the image as a virtual image V across the combiner 7 (windshield). . In the present embodiment, the screen 13 of the display device 1 is not directly visible, but the angle of the virtual image V with respect to the line of sight is the same as the angle between the optical axis of the emitted light from the display device 1 and the screen. That is, when the screen base 12 rotates while maintaining the angle of the screen with respect to the line of sight, the screen moves in the depth direction while maintaining the angle of the virtual image V. Therefore, also in this embodiment, when the screen base 12 rotates, the angles of the plurality of screens 13 with respect to the line of sight are maintained.

FIG. 15 shows a display example using the head-up display 100 shown in FIG. FIG. 15A is an example displayed when the vehicle is stopped. For example, a navigation route for navigation is displayed. In this case, in the display device 1, the display surfaces of the

screens

13a, 13b, 13c, and 13d are arranged in the same plane to form a single display surface (FIGS. 1 and 4A). I have to. FIG. 15B is an example of a warning display during traveling. Also in this case, as in FIG. 15A, the display device 1 is in a state in which the display surfaces of the

screens

13a, 13b, 13c, and 13d are arranged on the same plane to form one display surface. (FIGS. 1 and 4A).

FIG. 15C is an example displayed during traveling, for example, an arrow indicating a guide or the like is displayed. In this case, the display device 1 is in a state where the display surfaces of the plurality of

screens

13a, 13b, 13c, and 13d are arranged at intervals (FIGS. 2, 4B, and 4C). ing. FIG. 15D is an example of road surface display during traveling. Also in this case, as in FIG. 15C, the display device 1 is in a state in which the display surfaces of the plurality of

screens

13a, 13b, 13c, and 13d are arranged at intervals (FIGS. 2 and 4). b) and FIG. 4 (c)).

In FIG. 14, as described above, FIGS. 14A and 14B are planar displays, and FIGS. 14C and 14D are depth displays (displays with depths).

According to the present embodiment, since the display device 1 is used for the head-up display 100, the virtual image V visually recognized by the observer on the head-up display 100 transitions from a state without a sense of depth to a state with a sense of depth. The depth position can be varied with a simple configuration.

Next, a display device according to a third embodiment of the present invention will be described with reference to FIGS. The same parts as those in the first and second embodiments described above are denoted by the same reference numerals and description thereof is omitted.

The display device 1A according to the present embodiment is provided with

lift rails

16a and 16b as lift mechanisms and a base 17 to which the lift rail 16 is fixed as compared with the configuration of the first embodiment.

The elevating rail 16 is erected from the base 17, the elevating rail 16a is connected to the side surface of the main body 11 on the side where the rotation driving unit 15A is disposed, and the elevating rail 16b is connected to the elevating rail 16a. The main body 11 is connected to the opposite side surface to be movable in the height direction (moves up and down). Further, the elevating rail 16a is driven by the motor of the rotation driving unit 15A. In this embodiment, in the vertical movement, a direction away from the base 17 is an upward direction, and a direction approaching the base 17 is a downward direction.

The rotation drive unit 15A is basically the same as that of the first embodiment except that mechanical parts such as a gear for driving the lifting rail 16 by a motor for rotating the screen base rotation shaft 14 are added. Yes.

In this embodiment, the rotation of the screen base 12 and the movement of the main body 11 by the lifting rail 16 are interlocked. That is, as shown in FIG. 16A, when the screen base 12 is rotated and tilted to the maximum, the main body 11 is located at the highest position in the height direction (the position farthest from the base 17). . Next, as shown in FIG. 16B, when the inclination of the screen base 12 is intermediate, the main body 11 moves closer to the base 17 than the position lower than FIG. 16A (FIG. 16A). Position). As shown in FIG. 16C, when the screen base 12 has the same inclination as the main body 11, and the display surfaces of the

screens

13a, 13b, 13c, and 13d are arranged on the same plane, the main body 11 is located at the lowest position in the height direction (position closest to the base 17 than in FIG. 16B).

Thus, by interlocking the rotation of the screen base 12 and the movement of the main body 11, for example, a display as shown in FIG. 17 becomes possible. FIG. 17 shows a display example when the display device 1B shown in FIG. 16 is used in a head-up display as shown in FIG. FIG. 17A shows the display in the state of FIG. 16A, FIG. 17B shows the display in the state of FIG. 16B, and FIG. 17C shows the state of FIG. Each display corresponds to a case. FIG. 17 is a display example when turning right at the end of the building BL while traveling on a road.

First, in FIG. 17A, since the right turn position is still ahead, the inclination of the screen base 12 is the maximum, the height of the main body 11 is also the maximum, and the position of the displayed virtual image V1 is also higher. The display feels the most position and depth. Next, in FIG. 17B, since the right turn position is approaching, the inclination of the screen base 12 is reduced, the height of the main body 11 is reduced, and the position of the displayed virtual image V2 is also shown in FIG. The display is lower than a) and feels less in depth.

And in FIG.17 (c), since the pedestrian PE was discovered when approaching the right turn position, a warning display is carried out. In this case, the display base is arranged on the same plane with the inclination of the screen base 12 being the same as the inclination of the main body 11, the height of the main body 11 is also the lowest, and the position of the displayed virtual image V <b> 3 is the lowest and flat display And

According to the present embodiment, the elevating rail 16 that moves the screen base 12 and the main body portion 11 up and down is provided, and the rotation driving unit 15A is configured to rotate the screen base 12 and the screen base 12 and the main body portion 11 by the elevating rail 16. Is linked to the movement of In this way, the change in depth display and the vertical movement of the display position can be linked. Therefore, when displaying in a planar shape, it is possible to display at the bottom and gradually display at the top as the depth increases.

Next, a display device according to a fourth embodiment of the present invention is described with reference to FIGS. The same parts as those in the first to third embodiments described above are denoted by the same reference numerals and description thereof is omitted.

The present embodiment has the same basic configuration as the display device 1 shown in the first embodiment, but the size and elements of the screen 13 (13f, 13g, 13h, 13i) are different. The screen 13 of the present embodiment has the same height direction and is substantially the same length as the total length of the

screens

13a, 13b, 13c, 13d of the first embodiment.

Therefore, when the screens 13 of the present embodiment are arranged at intervals as shown in FIG. 18, they are arranged at equal intervals while maintaining the angle of θscreen. In addition, when the interval is eliminated as shown in FIG. 19, the screens overlap with each other without an interval. Note that “without an interval” includes not only a state where there is no gap, but also a state where the interval is very small compared to the state of FIG. 18.

That is, the rotation driving unit 15A rotates the screen base 12 (holding unit), and the

screens

13a, 13b, 13c, and 13d are arranged so that the display surfaces overlap each other, and the display surfaces are spaced from each other. To the state of being placed with a gap.

Further, the screen 13 in the present embodiment is a screen whose optical state changes with application of voltage. As for the optical state of the screen 13, a scattering state is an image state, and a transparent transmission state in which the scattering of incident light is smaller and the parallel light transmittance is higher than that is a non-image state. That is, it is possible to switch between a transmission state and a scattering state with respect to light.

The screen 13 may be, for example, a light control screen that uses a liquid crystal material and changes a scattering state and a transparent transmission state in which the scattering of incident light is small. Examples of the light control screen include a screen using a liquid crystal element such as a polymer dispersed liquid crystal.

FIG. 20 shows a schematic cross-sectional view of the screen 13 capable of controlling the optical state. The screen 13 shown in FIG. 20 has an optical layer 25 in which a composite material containing liquid crystal is sandwiched between a pair of transparent glass plates 21 and 22. A common electrode 23 is formed on one glass plate 21 on the optical layer 25 side. A scan electrode 24 is formed on the optical layer 25 side of the other glass plate 22. An intermediate layer made of an insulator may be formed between the

electrodes

23 and 24 and the optical layer 25.

Further, the common electrode 23 and the scan electrode 24 are formed as transparent electrodes by using, for example, ITO (indium tin oxide). The optical layer 25 is disposed between the common electrode 23 and the scan electrode 24.

A voltage is applied to the screen 13 so as to generate a potential difference between the scan electrode 24 as the first electrode and the common electrode 23 as the second electrode. The optical state in the optical layer 25 changes depending on the voltage applied to the common electrode 23 and the scan electrode 24.

The screen 13 is classified into a reverse mode and a normal mode according to the state when a voltage is applied so as to generate a potential difference. The screen 13 operating in the reverse mode is in a transparent transmissive state in a normal state where no voltage is applied. When a voltage is applied, it becomes a scattering state with a scattering rate of parallel rays according to the applied voltage. In the screen operating in the normal mode, the screen 1 is in a scattering state in a normal state where no voltage is applied. When a voltage is applied, a transparent transmission state with parallel light transmittance corresponding to the applied voltage is obtained. As for the optical state of the screen 13, a predetermined scattering state corresponds to an image state, and a transparent transmission state having a higher parallel light transmittance than that corresponds to a non-image state. In the following description, the reverse mode is described, but the normal mode is also applicable.

Next, the operation of the screen 13 will be described with reference to the timing chart of FIG. FIG. 21 shows the operation of the four

screens

13f, 13g, 13h, and 13i in the state shown in FIG. 18 (during depth display). The common electrode in FIG. 21 is the common electrode 23 described above, and applies a common waveform to the

screens

13f, 13g, 13h, and 13i.

21 is a waveform of the scan electrode 24 of the screen 13f, the scan electrode G of the screen 13g, the scan electrode H of the screen 13h, and the scan electrode I of the screen 13i.

First, the waveform of the common electrode 23 is inverted every frame. That is, in FIG. 21, it is driven by the frame inversion method. Next, the scan electrode 24 will be described. From time t1 to t2, only the scan electrode F is at the Lo level and a potential difference is generated between the common electrode 23 and the screen 13f is in a scattering state. At this time, the

other screens

13g, 13h, and 13i remain in the transmissive state. Therefore, the image projected from the projector or the like is displayed on the screen 13f. Next, from time t2 to t3, only the scan electrode G becomes Lo level and a potential difference is generated between the common electrode 23 and the screen 13g is in a scattering state. At this time, the

other screens

13f, 13h, and 13i remain in the transmissive state. Therefore, the image projected from the projector or the like is displayed on the screen 13g.

Next, from time t3 to t4, only the scan electrode H is at the Lo level and a potential difference is generated between the common electrode 23 and the screen 13h is in a scattering state. At this time, the

other screens

13f, 13g, and 13i remain in the transmissive state. Therefore, the image projected from the projector or the like is displayed on the screen 13h. From time t4 to t5, only the scan electrode I is at the Lo level and a potential difference is generated with the common electrode 23, so that the screen 13i is in a scattering state. At this time, the

other screens

13f, 13g, and 13h remain in the transmissive state. Therefore, the image projected from the projector or the like is displayed on the screen 13i.

From time t6 to t10, since the common electrode 23 is inverted, the same as time t1 to t5 except that only a specific scan electrode becomes Hi level.

In this way, images are sequentially displayed on the

screens

13f, 13g, 13h, and 13i. Therefore, by driving in this way, a two-dimensional image sampled in the depth direction is displayed on a display surface arranged in the depth direction as viewed from the observer, for example, and a depth sample that displays a three-dimensional stereoscopic image It is possible to display with a depth by using a well-known stereoscopic display method such as a conversion method or a DFD (Depth Fused 3D) method for adjusting the luminance between a plurality of depth-sampled images.

According to the present embodiment, the rotation driving unit 15 rotates the screen base 12 so that the

screens

13f, 13g, 13h, and 13i are arranged so as to overlap each other without any gap, and the

screens

13f, 13g, 13h, and 13i Transition is made to a state in which they are arranged at intervals. By doing in this way, both the display of the substantially planar shape in which the

screens

13f, 13g, 13h, and 13i overlap each other and the display having the depth in which the depth position of each of the

screens

13f, 13g, 13h, and 13i is changed are provided. It is possible to display.

Next, a display device according to a fifth embodiment of the present invention is described with reference to FIGS. The same parts as those in the first to fourth embodiments described above are denoted by the same reference numerals and description thereof is omitted.

The present embodiment is an example in which the display device 1B including the configuration described in the fourth embodiment is applied to a digital signage device.

As shown in FIG. 22, the digital signage device 200 includes a display device 1B, a projector 3, a screen control device 5, a video control device 6, and a screen drive device 8, and is installed in, for example, a showcase. .

The projector 3 and the screen control device 5 are the same as those in the second embodiment. The video control device 6 generates a video (such as a depth sampled video or a video with different luminance) adapted to the stereoscopic display method instead of the processing described with reference to FIG.

The screen driving device 8 performs control of each electrode of the

screens

13f, 13g, 13h, 13i, control of the projection timing of the projector 3, and the like in order to perform the driving shown in FIG.

FIG. 23 shows a configuration example in which the digital signage apparatus 200 having the configuration shown in FIG. 22 is used in a showcase. FIG. 23 shows a wristwatch 50 as an entity in the showcase. The display device 1B is installed between the observer and the wristwatch 50.

23 on the left side of FIG. 23 is a configuration for displaying a plane. In this case, if the screen of the display device 1B is always in a scattering state, the wristwatch cannot be observed. Therefore, the scattering state is set for only a part of one frame, and an image is displayed only for that period. By repeating this for each frame, the light from the screen 13 appears to be averaged (integrated) to the human eye, and both the screen 13 and the wristwatch 50 behind it can obtain high visibility. Therefore, the see-through characteristic of the screen 13 can be obtained while maintaining the visibility of the image during the projection period of the image light.

The right side of FIG. 23 is a configuration for depth display. Also in this case, similarly to the above, by providing a period in which all the screens are in a transmissive state at regular intervals, both the screen 13 and the wristwatch 50 in the back can be visually recognized.

According to the present embodiment, since the display device 1B is used for the digital signage device 200, the digital signage device 200 can make a transition from a state having no sense of depth to a state having a sense of depth, and has a simple configuration. The depth position can be changed with.

In each of the embodiments described above, the

screens

13a, 13b, 13c, 13d, etc. are provided by the

rails

11a, 11b, 11c, 11d provided on the screen base 12 and the main body 11 and the angle maintaining guides 13a2, 13b2, 13c2, 13d2, etc. While maintaining the angle, the plane display and the depth display are switched. However, a motor or the like is prepared for each of the rotation shafts 13a1, 13b1, 13c1, and 13d1, and the

screens

13a, 13b, 13c, and 13d are driven by the motor. You may make it maintain an angle.

Further, the present invention is not limited to the above embodiment. That is, those skilled in the art can implement various modifications in accordance with conventionally known knowledge without departing from the scope of the present invention. Of course, such modifications are included in the scope of the present invention as long as the configuration of the display device of the present invention is provided.

1, 1A, 1B Display device 3 Projector (projection unit)
11 Body 11a Rail (Maintenance mechanism)
11b Rail (maintenance mechanism)
11c Rail part (maintenance mechanism)
11d Rail part (maintenance mechanism)
12 Screen base (holding part)
13a screen 13b screen 13c screen 13d screen 13e screen 13f screen 13g screen 13h screen 13i screen 13j screen 13k screen 13l screen 13a1 rotation axis (first axis)
13b1 Rotation axis (first axis)
13c1 Rotation axis (first axis)
13d1 rotation axis (first axis)
13a2 Angle maintenance guide (maintenance mechanism, guide part)
13b2 Angle maintenance guide (maintenance mechanism, guide part)
13c2 Angle maintenance guide (maintenance mechanism, guide part)
13d2 Angle maintenance guide (maintenance mechanism, guide part)
14 Screen base rotation axis (second axis)
15, 15A Rotation drive unit 16 Elevating rail (elevating mechanism)

Claims

Multiple screens,
A holding unit for rotatably holding the plurality of screens around a first axis parallel to the display surface of the screen;
A rotation drive unit that rotates the holding unit around a second axis parallel to the first axis;
A maintenance mechanism for maintaining an angle of the plurality of screens with respect to the line of sight when the holding portion rotates,
The first axes of the plurality of screens are held by the holding unit at intervals along a direction perpendicular to the first axes.
A display device characterized by that.
The rotation driving unit rotates the holding unit to arrange the plurality of screens with their display surfaces arranged on the same plane, and the plurality of screens arranged at intervals. The display device according to claim 1, wherein the display device is transitioned to a state in which it is present.
The rotation driving unit rotates the holding unit to change between a state in which the plurality of screens are arranged so as to overlap each other and a state in which the plurality of screens are arranged at intervals. The display device according to claim 1.
The display device according to claim 3, wherein the screen can be switched between a scattering state and a transmission state by applying a voltage.
The display device according to any one of claims 1 to 4, wherein the maintenance mechanism includes a guide portion provided on a screen and a rail portion on which the guide portion moves.
An elevating mechanism for moving the holding part and the maintenance mechanism up and down;
The display device according to claim 1, wherein the rotation driving unit interlocks rotation of the holding unit with movement of the holding unit and the maintenance mechanism by the lifting mechanism. .
7. The screen according to claim 1, wherein an end face on an adjacent screen side is formed in a taper shape, and an end face formed in the taper shape and an end face formed in a taper shape of the adjacent screen overlap each other. The display apparatus as described in any one of these.