JPH05100314A - Portable display device for moving image and still image - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a portable moving image still image display device which is convenient to carry and can display moving images and still images on a large screen. A transparent image forming device 5 for visualizing an output of an image signal reproducing device 4, a slide holding member 2, and an image displayed on the slide holding member 2 or the transparent image forming device 5 is projected onto a projection lens 3, 6. An optical projection device 7 for enlarging and projecting through the optical system, a switching unit 8 for switching the arrangement of the transmissive image forming device 5 and the focal lengths of the projection lenses 3 and 6 according to the mode selection, and the projection by the optical projection device A transparent screen 9 for displaying an image, and a storage means (case 1) for storing the screen 9 in a foldable manner and for integrally storing the respective devices are provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable display device capable of displaying video images and slide images.

[0002]

2. Description of the Related Art It is often the case that a slide is projected on a screen to give an explanation to a still image, or a moving image is recorded on a video tape recorder (VTR) so as to be shown to another person while giving an explanation to the image. It is being appreciated.

A VTR equipped with a display device as a device for displaying a video image is used for such an application, and there are a cathode ray tube (CRT) type, a liquid crystal display panel type VTR and the like. As a portable device that displays a slide image, there is a slide projector with a built-in screen.

[0004]

Considering transportation, a display device using a cathode ray tube is heavy and cannot be made into a large screen, and a liquid crystal panel is used in a liquid crystal display device. Since it is technically very difficult to increase the screen size of the panel itself, it is difficult to display moving images and still images on a portable device.

Due to such a situation, a small liquid crystal panel is generally used as a VTR incorporating a portable display device. In addition, there is a technology for enlarging and projecting with a liquid crystal panel and an optical projection device in order to increase the screen size, but in this case it is not suitable for displaying a still image because it is difficult to increase the resolution of the liquid crystal panel. is there. Therefore, an object of the present invention is to provide a portable moving image / still image display device which is convenient to carry and can display moving images and still images on a large screen.

[0006]

In order to achieve the above object, the present invention provides (1). A still image display mode and a moving image display mode are selectable, and a transparent image forming device for visualizing the output of the image signal reproducing device, a slide holding member, and the slide holding member or the transparent image forming device are displayed. An optical projection device for enlarging and projecting an image through a projection lens, a switching means for switching the arrangement of the transmission image forming device and the focal length of the projection lens according to the selection of the mode, and the optical projection device. (EN) Provided is a device including a transmissive screen which projects a projected image, and a storage unit which can store the screen in a foldable manner and which stores the above-mentioned devices integrally.

(2). In the above (1), the transmissive image forming apparatus may be a liquid crystal display panel, and the short side direction of the display screen may be accommodated in the thickness direction of the accommodating means.

(3). In the above (1), a projection lens is provided between the transmissive image forming apparatus and the screen, and the optical axis of the projection light from the optical projection apparatus is a plane including the lateral direction of the display surface of the transmissive image forming apparatus. It may be configured to be bent twice inside and between the transmission type image forming apparatus and the screen.

(4). In (1) above, the screen may be set in a projectable state by opening the lid of the storage means, and the lid may cover the upper end portion of the screen.

(5). In (4) above, the vent hole for exhaust heat of the optical projection device may be located at a portion covered by the lid when the lid of the storage means is closed.

(6). In the above (1), it is possible to provide a shock absorbing structure by providing a handle portion at one end of the accommodating means and extending the handle portion to make a round around the accommodating means.

(7). In the above (1), the switching by the switching means moves and arranges the projection lens for still image projection to the front position of the slide holding member fixedly arranged, and the projection lens for this still image projection to the front position. It is possible to switch the state in which the combination of the projection lens for projecting a moving image and the transmission type image forming apparatus is moved and arranged to the front position while being retracted from.

(8). In the above (1) to (7),
It is also possible to automatically select the mode in accordance with whether or not the slide holding member is attached to the slide or whether the image signal reproducing device is turned on or off, and not to turn on the image signal reproducing device when the slide holding member has no slide.

(9). In the above (1), when the moving image display mode is selected, it is possible to attach a slide removing means for automatically removing the slide from the slide holding member.

(10). In the above (1), the focus of the projection lens can be switched by operating the adjustment ring of the variable focal length lens unit.

(11). In the above (2), the transmissive screen can be freely moved in and out of the projection optical path, and an image that is left-right reversed from the image originally formed on the transmissive screen is interlocked with the operation of moving the screen out of the projection optical path. It is also possible to provide an image inverting means for creating.

[0017]

The moving image displayed on the transmissive image forming apparatus provided to correspond to the slide in the portable still image display apparatus is enlarged by the enlargement projection means and projected on the screen.

[0018]

【Example】

1. Example corresponding to claims 1, 2, and 7 Device configuration; In this example, as shown in FIGS. 1, 3, and 7 to 9, for enlarging display of still images and moving images in a portable case 1. All means of are stored. As shown in FIG. 3, the case 1 has a main body 1A having a deep box and a shallow lid 1B, and the link 10 is provided at the opposite end of the handle portion 11.
It can be opened and closed by being connected with.

In the apparatus of this embodiment, both a still image and a moving image can be enlarged and projected on the screen, and a still image display mode is selected when projecting a still image and a moving image display mode is selected when projecting a moving image. .. Referring to FIG. 1, a case 1 has a unit for projecting a still image, a unit for projecting a moving image, and a unit common to both units, which are integrally housed.

The means for projecting a still image includes a frame-shaped slide holding member 2 which holds a slide in a replaceable manner, and a projection lens 3 which magnifies an image of the slide and forms an image on a screen.

As means for projecting a moving image, an image signal reproducing device 4 such as a VTR or a personal computer, a transmission type image forming device for reproducing a moving image output from this image signal reproducing device in a visually and light transmitting state, Specifically, it includes a liquid crystal panel 5 and a projection lens 6 that magnifies an image of the liquid crystal panel and forms an image on a screen.

As a means common to both the enlarged projection of a still image and the enlarged projection of a moving image, an optical projection device 7 that guides an optical image of a still image or a moving image to a screen through a projection lens, is selected depending on the mode switching. A switching means 8 for switching the positions of the projection lenses 3 and 6 and the liquid crystal panel 5 and a transmissive screen 9 which is a medium for projecting a still image call motion image are included. In addition, the fan 3 is used to dissipate heat from the heat generating parts such as the light source.
7 is installed, and a vent 38 is provided in a part of the inner lid 1D that covers the main body 1A except for the entrance and exit of the optical path, the tape removal port, and the like.

The optical projection device 7 includes a lamp 7A, a concave reflection mirror 7B, a condenser lens 7C, an optical path bending mirror 7D, a Fresnel lens 7E, and optical path bending mirrors 7F and 7F.
G and the like are included. Of these, the lamp 7A, the concave reflection mirror 7B, the condenser lens 7C, and the optical path bending mirror 7
The D and Fresnel lens 7E constitute a projection unit together with the projection lenses 3 and 6, the liquid crystal panel 5, the switching means 8 and the like, and are provided on the main body 1A side. The image signal reproducing device 4 is also provided on the 1A side. Optical path folding mirror 7
The G and the screen 9 are provided inside the lid 1B.

As shown in FIG. 3, the optical path bending mirror 7G is fixed to the bottom surface of the lid 1B, and one end of the screen 9 is pivotally attached to the handle 11 side. Optical path folding mirror 7
The other end of G is slidable along a guide 1C provided on the main body 1A, and the screen 9 is set perpendicular to the surface of the main body 1A as the cover 1B of the case is opened to the limit.
The lid 1B and the optical path bending mirror 7G are held in an inclined state. Thereby, the projection optical path is formed.

The switching means 8 includes a lever 8A pivotally attached at one end to a central portion on the rear side of the body (opposite to the handle), and a segment gear 8G1 fixed to the other end of the lever.
It is composed of a drive gear 8G2 and the like which is meshed with the segment gear and is driven in the forward and reverse directions by a motor 8M.

A long hole is formed in the middle of the lever 8A,
The projection lenses 3 and 6 are provided at intervals on a frame 36 that is integral with a pin that engages with this. Frame 36
Since the moving direction is restricted only in the longitudinal direction of the main body 1A by a guide (not shown), the projection lens 3 or 6 can be switched on the optical path according to the rotation of the lever 8A.

Further, on the other end side of the lever 8A, the liquid crystal panel 5 is aligned with the lateral direction of the display screen (Y direction shown in FIG. 4) in the thickness direction of the case 1 (Y direction shown in FIG. 3). It is fixed. Thus, the liquid crystal panel 5 can switch its position between the optical path and the outside of the optical path according to the rotation of the lever 8A.

Since the slide holding member 2 is at a fixed position on the optical path and the slide is removed from the slide holding member 2 in advance in the moving image display mode, the projection light passes through the central opening of the slide holding member and the liquid crystal panel 5 is projected. And the projection of the moving image is made.

In the still image display mode, the slide is mounted on the slide holding member 2, the liquid crystal panel 5 is in the light transmitting state, and the image of the slide is projected on the screen.

Here, since the object position, that is, the positions of the slide holding member and the liquid crystal panel are different, the slide holding member 2 and the projection lens 6 for projecting a moving image, and the liquid crystal panel 5 so as to satisfy the image forming condition. Each of the projection lenses 3 for projecting a still image is configured as a set. Therefore, the projection lens and the liquid crystal panel move with respect to the fixed lens holding member 2 according to the mode switching.

Moving picture display mode: When the apparatus is set to the moving picture display mode, the liquid crystal panel 8 moves to the optical axis position in front of the Fresnel lens 7E as shown in FIG. The projection lens 6 moves and is held at the front position on the front optical axis of the slide holding member 2. In the still image display mode, the projection lens 3 for projecting a still image is located in the space, and the liquid crystal panel 8 is retracted from the same space as indicated by the chain double-dashed line.

The light generated from the lamp 7A is collected by the concave reflection mirror 7B and the condenser lens 7C, is bent by the optical path bending mirror 7D, and illuminates the Fresnel lens 7E. This light is subjected to brightness modulation by passing through the liquid crystal panel 5, passes through the hollow portion of the slide holding member 2, and is focused on the projection lens 6. This projection light is bent upward (in the Y direction shown in FIG. 3) by the optical path bending mirror 7F and further bent toward the front side (handle part) by the optical path bending mirror 7G.
An image is formed on the screen 9. Here, the liquid crystal panel 5
Since a moving image is formed by the signal reproduced by the image reproducing device 4, this image is enlarged and displayed on the screen 9.

Still image display mode: When this apparatus is set to the still image display mode, the liquid crystal panel 5 is retracted laterally from the optical axis as shown by the chain double-dashed line in FIG. The projection lens 3 moves to the front position optical axis of the slide holding member instead of the projection lens 6 up to. Then, by inserting the slide into the slide holding member 2, the image of the slide is enlarged and displayed on the screen 9. The system leading to the display on the screen according to the above mode switching is as shown in FIG.

In this way, one unit can display moving images and high-density still images. Also, since it is used as a liquid crystal panel, the case can be made thin, and it is very convenient to carry because it is a single unit. is there. Note that the focal length of the projection lens is switched by changing the positions of the two lenses in this example, but in addition to this, as will be described later with reference to FIGS. 13 and 14, one lens with variable focus is used. Units can also be used.

2. Examples Corresponding to Claims 2 and 3 As the liquid crystal panel 5, a liquid crystal panel developed for a liquid crystal television can be used. It is also cheap because it is produced in large quantities. In this case, a TFT (thin film transistor) is provided inside the liquid crystal.
Is used, the incident direction of light is limited as shown in FIG.

Since the video image has different lengths in the vertical and horizontal directions, the liquid crystal panel is shorter in the vertical direction than in the horizontal direction. The short-side direction is the vertical direction. Here, the short side direction of the liquid crystal panel 5 is arranged so as to match the thickness direction of the case 1 (Y direction shown in FIG. 4), and illumination light is applied from the front side (handle part) side of the case, and the light is passed through the projection lens 6. After passing it, bend it upwards (Y direction) with the optical path bending mirror 7F,
Since it is returned to the front side (handle part) by the optical path folding mirror 7G, the image becomes a normal image, and it is possible to arrange the optical path folding mirror 7F without moving in the case (FIG. 3, FIG. (See FIG. 5).

Here, regarding the number of times the optical path is bent, when a light-transmissive screen is used and a liquid crystal panel that displays a normal image when receiving illumination light from the rear is used, the liquid crystal panel 5 and the screen are used. The number of bends between 9 must be even.

In this case, 2.4.6. ...
When the number of folds is 4 or more, the image has an area spread, so
It is not suitable for practical use, and it is appropriate to select twice.
Further, when the liquid crystal panel 5 is arranged vertically to the main body 1A of the case, the thickness of the case is dominated by the height of the liquid crystal panel 5, so selecting a shorter lateral direction greatly contributes to downsizing. To do.

As described above, according to this embodiment, the cost can be reduced by using the inexpensive liquid crystal panel, and the weight and size of the device can be reduced.

3. As shown in FIG. 3, the example screen 9 corresponding to claim 4 has one end side pivotally attached to one end of the optical path bending mirror 7G, and the other end side slidably attached to the guide 1C. The undulating motion is performed inside according to the opening and closing of the lid. That is, when the lid 1B is lifted, the lid 1B is set to the position of the state of use by one rotation operation.

Even when the screen 9 is set, as shown in FIG. 3, the upper end of the screen 9 (the pivotal connection with the optical path bending mirror 7G) is located inside the lid 1B, so that Even when the lid is closed for storage, it does not come out of the case, which is convenient in terms of appearance and protection.
Further, by adopting such a structure, as shown in FIG. 6, external light coming from above illuminates the screen during use,
It prevents reflection on the surface of the screen and deterioration of the contrast.

As described above, the operation for use is simple, and the deterioration of the contrast due to the external light from the upper part can be prevented, so that an image can be satisfactorily displayed even if there is indoor illumination light on the upper part.

4. Example Corresponding to Claim 5 As shown in FIGS. 1 and 7, the heat generated from the lamp 7A is discharged to the outside through the ventilation hole 38 by the fan 37. Here, since the ventilation port 38 is provided in the inner lid 1D of the case, when the lid 1B is closed, it is blocked from the outside and rainwater or the like does not enter. Also, when using, the lid 1B
Since it can be opened, it does not interfere with heat discharge.

5. Example Corresponding to Claim 6 As shown in FIG. 8 and FIG. 9, the extension of the handle portion 11 is a shock absorbing structure by a hollow member 39 which goes around the circumference of the case 1 in order to make the case 1 easy to carry. For this reason,
The impact force F is absorbed by the pipe-shaped structure when the case 1 is dropped, dropped, hits forward, hits from the rear, etc., and the inside is protected. Further, since the hollow member 39 can be formed integrally with the handle portion 11, it is easy to manufacture.

6. Example corresponding to claim 8 Whether or not the slide 54 is attached to the slide holding member 2 by providing an optical sensor as shown by reference numeral 50 in FIG.
Alternatively, a switch interlocking circuit is provided in order to perform mode switching in conjunction with turning on / off the image signal reproducing device 4 shown in FIG. 1, and a mode is automatically selected according to on / off of the image signal reproducing device, The image signal reproducing device may not be turned on when the slide holding member does not slide.

7. Example Corresponding to Claim 9 This example relates to slide excluding means for automatically excluding slides from the slide holding member when the moving image display mode is selected.

As shown in FIG. 10, the slide removing means includes a slide holding and removing plate 52 which is reciprocally movable in a direction 51 of the arrow orthogonal to the optical axis, a guide 53 for guiding the slide holding and removing plate 52, and a slide holding means. The slide holding member 2 and the like are arranged so that the bending plates 55 face each other so as to allow the exclusion plate 52 to pass and hold the slide 54 and allow the slide to be inserted and removed in the direction of the arrow 55.

The slide holding / excluding plate 52 has a horizontal portion 52a for supporting the slide and an inclined portion 52b for eliminating the slide, and is linked with the mode switching by an appropriate driving means such as a motor, a solenoid or a link mechanism (not shown). And is moved in the direction of arrow 51. In the still image display mode, the slide 54 has the horizontal portion 52a as shown in FIG.
It is supported by.

When the mode is switched to the moving image display mode, FIG.
As shown in FIG. 2, since the slide holding / excluding plate 52 is moved, the slide 54 is moved by the inclined portion 52b accordingly.
Are excluded from the slide holding member 2. This frees the user from the trouble of manually removing slides when switching modes.

8. Example corresponding to Claim 10 This example replaces the example of FIG. 1 in which the two lenses of the projection lens 3 for still image and the projection lens 6 for moving image projection are switched according to the mode. One focal length variable lens unit is prepared, and its adjustment ring is automatically moved in association with the mode change to perform the same function.

In FIG. 13, the variable focal length lens unit 56 has a focal length adjusting ring 57. The peripheral surface of the adjusting ring 57 is a gear, and the rack 58
The focal length changes as the rack 58 is moved in the direction of the arrow 59.

Therefore, the mechanism for moving the rack 58 will be described. As shown in FIG. 14, a pin 61 is planted on the back surface of the rack 58 and the pin 61 is engaged with a long hole 60 formed in the middle of the lever 8a. Let Further, the rack 58 is guided by the guide 62.

With this structure, it is possible to automatically change the focal length of the projection lens in association with the movement of the lever 8a for switching the liquid crystal panel 5 according to the mode change.

9. Example corresponding to claim 11 In this example, an image can be displayed on a built-in transmissive screen or can be displayed on a large reflective screen. As a means to realize this method,
It is conceivable to switch the projection optical path using a mirror.

However, when a mirror is used, it is necessary to set the optical path to the built-in screen and the optical path for projection to the external screen separately, and the main body becomes large.

In addition, the projection image on the transmissive screen and the projection image on the reflective screen must be formed so that the images to be formed are inside out. However, the minimum number of intermediate mirrors is required as the means, and Considering the direction of, it is almost impossible to avoid making the main body larger.

This example solves these problems and enables projection on both the built-in transmissive screen and the external reflective screen without changing the projection optical path.

Therefore, the transmissive screen can be freely moved in and out of the projection optical path, and in cooperation with the operation of moving the screen out of the projection optical path, an image that is left-right inverted from the image originally formed on the transmissive screen is created. An image inverting means is provided.

In FIG. 15, the transmissive screen 9 is rotatable at a lower support position 70, and when projecting onto the screen, it is as described above, and as shown in the drawing, is substantially perpendicular to the main body surface. Positioning and placing the screen on the projection path causes the projection light to image the screen.

Next, when projecting on the reflection type screen 71, the screen 9 is tilted forward and brought out of the projection optical path. As a result, the projection light remains as it is on the external screen 7.
1 will form an image. Needless to say, at this time, the lens position is adjusted to bring the image into focus.

A detection switch 72 is attached to the upper end position of the screen 71. This switch 72
Detects that the screen has been switched to a projection state on the screen 71 in the process of being rotated. This detection signal is used as a shift switching signal by the shift controller 7
3. It is given to each shift register for switching the shift direction.

The liquid crystal panel 5 is adapted to be driven by being supplied with data in a matrix form. That is, the X driver 73 receives the X signal from the controller 73.
The Y driver 73 is driven by the X and Y signals. In addition, the X driver consists of a shift register and a latch driver, and this shift register uses left / right shift.

When using the transmissive screen 9,
The switch SW is placed in the state shown in FIG. 16, and the X signal for image is shifted from left to right to produce a normal image. Further, when the reflection type screen 71 is used, a normal image can be projected even on the reflection type screen by reversing the right and left sides by reversing the shift direction with the detection signal.

Therefore, the detection switch 7 in this example is
2, the switch SW and the X driver 73X constitute an image inverting means.

[0065]

According to the present invention, it is possible to provide a portable moving image still image display device which is convenient to carry and can display moving images and still images on a large screen.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an internal configuration of a case body of a display device according to the present invention.

FIG. 2 is a block diagram illustrating an image display system of a display device according to the present invention.

FIG. 3 is a side view of a display device according to the present invention.

FIG. 4 is a perspective view illustrating an example of a transmissive image forming apparatus used in the display device according to the present invention.

FIG. 5 is an optical path diagram when forming a moving image in the display device according to the present invention.

FIG. 6 is an explanatory diagram of blocking of external light.

FIG. 7 is an explanatory diagram of waste heat.

FIG. 8 is an external front view of the case.

9 is a sectional view taken along the line JJ of FIG.

FIG. 10 is a perspective view of slide removing means according to the present invention.

FIG. 11 is a front view illustrating a state before slide removal of the slide removing means according to the present invention.

FIG. 12 is a front view for explaining a state of the slide removing means according to the present invention when removing a slide.

FIG. 13 is a perspective view of a variable focal length lens unit according to the present invention.

FIG. 14 is an explanatory diagram of a focal length adjusting mechanism using a variable focal length lens unit according to the present invention.

FIG. 15 is a diagram illustrating an example in which a reflective external screen according to the present invention is provided.

FIG. 16 is a diagram illustrating an example of an image inverting means according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case (as storage means) 3 Projection lens 2 Slide holding member 4 Image signal reproducing device 5 Transmission type image forming apparatus 6 Projection lens 7 Optical projection apparatus 8 Switching means 9 (Transmission type) screen

Claims (11)

[Claims] 1. A still image display mode and a moving image display mode are selectable, and a transparent image forming apparatus for visualizing the output of an image signal reproducing apparatus, a slide holding member, the slide holding member or the transparent type. An optical projection device for enlarging and projecting an image displayed on the image forming device via a projection lens, and a switching unit for switching the arrangement of the transmission image forming device and the focal length of the projection lens according to the selection of the mode. A portable moving image still image, characterized by comprising: a transmissive screen for projecting an image projected by the optical projection device; and a storage means capable of folding the screen so as to be foldable and integrally storing the respective devices. Display device. 2. The transmissive image forming apparatus according to claim 1, wherein the transmissive image forming apparatus is composed of a liquid crystal display panel, and the lateral direction of the display screen is
A portable moving image and still image display device, characterized in that it is stored according to the thickness direction of the storing means. 3. The projection lens according to claim 1, wherein a projection lens is provided between the transmissive image forming apparatus and the screen, and an optical axis of projection light from the optical projection apparatus is on a display surface of the transmissive image forming apparatus. A portable moving image still image display device, which is bent twice in a plane including a lateral direction and between the transmission type image forming device and the screen. 4. The portable device according to claim 2, wherein the screen is set in a projectable state by opening a lid of the storing means, and the lid covers an upper end portion of the screen. Video still image display device. 5. The portable type according to claim 4, wherein a heat exhaust vent of the optical projection device is located at a portion covered by the lid when the lid of the storage means is closed. Video still image display device. 6. A portable moving picture stationary apparatus according to claim 1, wherein a handle portion is provided at one end of the accommodating means, and an extension of the handle portion is a shock absorbing structure formed by a hollow member that goes around the accommodating means. Image display device. 7. The state according to claim 1, wherein the switching by the switching means moves and arranges a projection lens for projecting a still image to a front position of a slide holding member fixedly arranged.
The projection lens for still image projection is retracted from the front position, and a combination of the projection lens for moving image projection and the transmission type image forming apparatus is moved to and arranged at the front position. Portable video still image display device. 8. The method according to any one of claims 1 to 7, wherein a mode is automatically selected according to whether or not the slide holding member is attached to the slide or whether the image signal reproducing device is turned on or off. A portable moving image still image display device, characterized in that the image signal reproducing device is not turned on. 9. A portable moving image still image display according to claim 1, further comprising a slide removing means for automatically removing the slide from the slide holding member when the moving image display mode is selected. apparatus. 10. The portable moving image and still image display device according to claim 1, wherein the focus of the projection lens is switched by operating an adjusting ring of the variable focal length lens unit. 11. A transmission type screen according to claim 2, wherein the transmission type screen can be freely put in and taken out of the projection optical path, and the left and right sides of an image originally formed on the transmission type screen are interlocked with the operation of putting the screen out of the projection optical path. A portable moving image and still image display device, characterized by comprising image inverting means for producing an inverted image.