JPH0843943A - Projection type display device - Google Patents

Abstract

PURPOSE:To obtain a projection type display device which has a thin shape and short depth length and can be easily held without any handle, etc., and has its good mobility by which the storage status and observation status can be switched immediately. CONSTITUTION:A display device is so constituted that a screen part 3 and a base body 4 provided with a side plate around each circumference are arranged to block the opening end in front of and at the rear of a frame-shaped cabinet having four side surfaces, a projection block 7 and a reflection mirror 14 are fixed to the base body 4, one each end of each of the screen part 3 and the base body 4 is rotatably supported at mutually opposite outward directions and, in the case of storage status in which the screen part 3 and the base body 4 are at the positions almost parallel to the opening end, either one of side plates is engaged with the inside of its counterpart side, and in the observation status in which the screen part 3 and the base body 4 are opened at their specified angles, each side plate blocks the side of a projection light route, the projection light from the projection block 7 is reflected by means of a reflection mirror 14 and focused on the screen 2 of the screen part 3, and a transparent image is set in a status in which the image can be observed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a handy size projection display device which can be easily carried.

[0002]

2. Description of the Related Art In recent years, a display device using a liquid crystal display or a small CRT has been generally used as a small and easily portable (handy size) display device.
These screen sizes are mainly small, up to 6 inches. The reason why a portable display device of 6 inches or more is not common is that a liquid crystal display has a problem of high cost due to deterioration of manufacturability, and a CRT has a problem of impairing portability due to increase in volume and weight. Because there is.

Such a small-sized display device is unsuitable for watching for a long time or watching by a plurality of people. Especially, a liquid crystal display has a characteristic of having a narrow viewing angle. Is difficult. In order to enable long-term viewing and viewing by multiple people while maintaining a handy size, a display device having a relatively large screen size (about 7 inches to 12 inches) is realized while using a small and lightweight device. There is a need to solve the viewing angle problem.

As a means for obtaining such a display device, an image of a liquid crystal panel of a very small size (about 0.7 inch to 1.5 inch) is magnified by a projection lens and is projected and displayed on a built-in screen to display a transparent image. It is conceivable to obtain a display device.
As a form close to this purpose, there is Japanese Patent Publication No. 5-19870.

30 and 31 are shown in Japanese Patent Publication No. 5-19870.
FIG. 3 is a perspective view and a side sectional view of a conventional projection type television receiver disclosed in Japanese Patent Publication No. In the figure, 101 is a mirror lid mounted on the upper surface of the rear of the main body 102 so as to be openable and closable by a spindle, 103 is a screen portion rotatably supported on the front portion of the mirror lid 101, and 104 is fixed to the screen portion 103. And a transmissive screen 108, three projection CRTs of R, G, B of 1.5 inches fixed to the bottom of a top plate 109 provided on the main body 102.
Reference numeral 7 denotes a projection lens, and the projection CRT 108 and the projection lens 107 constitute a projection block 105.

Reference numeral 106 is a first mirror fixed in front of the projection lens 107, 110 is a second mirror attached to the mirror lid 101, and the light projected from the projection block 105 is the first mirror 106, the first mirror 106. After being reflected by the second mirror 110, it is enlarged and projected on the screen 104. Further, guide rollers 115 are attached to both sides of the lower end of the screen portion 103, and the guide rollers 115 are engaged with substantially linear guide grooves 116 formed in the side plate 113 of the main body 102. Also, the mirror lid 1
01, the screen portion 103 and the main body 102 are covered with a shielding curtain 121 that can be stored so as to straddle the mirror lid 101 and the screen portion 103.

Next, the opening / closing operation of the conventional device will be described. When carrying (storing) the screen portion 103, the mirror lid 10
After storing it inside 1, the mirror lid 101 is closed. When viewing an image, the mirror lid 101 can be lifted and the screen portion 103 can be taken out to the front centering on the spindle. At this time, the folded shielding curtain 121 is opened to open the mirror lid 101 and the screen portion 103. By closing the opening formed between the main body 102 and the main body 102, an image can be enlarged and projected on the screen 104.

[0008]

However, small-sized equipment that can be easily carried around for use needs to have a shorter depth (front-back) direction and height (thickness) direction, which results in easy maneuverability of opening and closing operations. Although necessary, in the conventional apparatus, the projection block 105 is perpendicular to the screen 104, and
They are arranged in a straight line and have a screen size of 7-12.
When setting to a small size such as inches, the projection block 10
There is a problem that the depth length determined by the length of 5 is significantly larger than the vertical length of the screen 104, and the depth size of the device is increased. Therefore, in the above-mentioned conventional example, a handle is provided as a carrying means.

The screen 103 and the mirror cover 101 are folded and housed on the top plate 109 of the projection block 105.
3. In addition to the thicknesses of the second mirror 110 and the mirror lid 101, a predetermined space is required between them, and a device height close to twice the height of the projection block 105 is required. There was a problem that was impossible.

Further, the shielding curtain 121 is a screen portion 103.
It needs to be housed in a narrow space between the mirror lid 101 and the mirror lid 101, and needs to be expanded in a fan shape at the time of viewing. Therefore, a flexible member must be formed into a bellows-like structure, resulting in poor appearance and durability. There was a problem to do.

To switch between the ornamental state and the stored (portable) state, after pulling up the mirror lid 101, the screen portion 1
It is necessary to move 03 by hand to put it in an ornamental state, and when storing it, the reverse operation is required, but since each operation consists of 2 steps,
There was a problem of poor operability.

Further, two reflection mirrors are required, the second mirror 110 is arranged close to the screen portion 103, and it is necessary to have a size substantially the same as the size of the screen 104 which is the end of the projection light cone. However, there is a problem in that the cost of parts increases and the cost of parts increases.

The present invention has been made in order to solve the above problems, and realizes a relatively large screen size (7 inches to 12 inches) in a portable projection display device, It is an object of the present invention to obtain a lightweight and low-cost projection display device which is extremely thin, has a short depth, can be opened and closed easily, and can be instantly operated.

[0014]

A projection display device according to a first aspect of the present invention is a screen having side plates on the periphery thereof so as to close front and rear opening ends of a frame-shaped casing having four side surfaces. And a base are arranged, a projection block and a reflection mirror are fixed to the base, and the screen and the base are rotatably supported at positions where one end of the screen and one end of the base are opposed to each other, and the screen and the base are open ends. In a stored state in a position substantially parallel to, in a viewing state in which one of the side plates is fitted inside the other side and the screen part and the base body are opened at a predetermined angle, each side plate blocks the side of the projection optical path. The projection light from the projection block is reflected by the reflection mirror and is formed on the screen of the screen portion so that the transmitted image can be viewed.

According to a second aspect of the present invention, in the projection display device, an optical axis bending mirror is arranged between a display medium such as a liquid crystal panel and a projection lens to form an L-shaped projection block, and the reflection block is used. It is configured to face the mirror.

Further, the projection type display device according to a third aspect of the present invention is constituted by means for opening and closing one of the screen portion and the base body and opening and closing the other. Is.

According to a fourth aspect of the present invention, in the projection display device, the functional portions necessary for the operation of the device, such as the input / output terminal, the heat radiation hole, and the sound emission hole of the speaker, the screen portion and the base body are predetermined. It is arranged only on the side surface of each of the screen portion and the base so as to be exposed only in the viewing state that opens at an angle.

According to a fifth aspect of the present invention, in the projection display device, the L-shaped projection block is an integral unit,
This is rotatably supported on the base body, and in addition to the rear projection display in which it is opposed to the reflection mirror, the projection lens is directed toward the back side of the base body, and front projection display is possible on the external screen at an arbitrary angle. It is a thing.

Further, in the projection type display device according to claim 6 of the present invention, in a normal state in which the projection lens portion is opposed to the reflection mirror, a focus adjustment ring provided on the outer periphery of the projection lens portion is provided from the outside of the housing. It has a rotatable structure.

According to a seventh aspect of the present invention, in the projection display device, the projection lens is a box-shaped portion formed by extending an opening provided in the base for rotating the projection lens toward the rear side of the base. The part is separated from the inside of the housing, and the opening for securing the projection optical path provided on the lower side surface part is closed with a transparent member.

Further, the projection display device according to the eighth aspect of the present invention comprises a screen portion, an arm portion extending to the lower end of the base body, and protruding from the lower surface of the housing at the time of storage, and each arm portion is grounded at the time of viewing. It is configured to be performed.

According to a ninth aspect of the present invention, in the projection display device, a corner portion of the inner surface of the lower portion of the base body including the space behind the reflection mirror is extended from an opening provided on either side plate of the base body. A hollow portion is provided, and a power cord integrated with the apparatus is detachably housed in the hollow portion.

According to a tenth aspect of the present invention, in the projection display device, a corner portion of the inner surface of the lower portion of the base body including the space behind the reflection mirror is extended from an opening provided in either the left or right side plate of the base body. A cable holding part is provided at the bottom of the cavity, and the cable that is led out from the holding part to the outside directly through the opening and the video camera connected to the end of the cable are stored inside the cavity. It is configured to do.

According to an eleventh aspect of the present invention, in the projection display device, the range of the lower corner portion of the base body including the space on the back surface of the reflection mirror and the area inside the left and right side plates of the base body by a certain width. Is a second housing, the second housing is rotatably supported by the base body, can be locked at a predetermined angle, and is grounded between the housing and the second housing. The power supply circuit section is housed in the base body.

According to a twelfth aspect of the present invention, in the projection display device, the front end portion of the housing and the base housing are rotatably integrated so that they can be rotated back and forth around the lower part of the housing. ,
It is possible to set the storage state in which the base body is in contact with the upper surface of the base casing so that the casing and the base casing are held in parallel with each other, and the use state in which the casing is erected at an arbitrary angle. A spring member that urges the housing around the axis of motion is provided,
In addition, a means for rotating the screen portion in the opposite direction of the base body about the rotation axis in association with the rotation of the base body is provided, and the base body and the screen portion are stored in the housing by using the storage state. It is configured such that the base body and the screen portion are opened when brought into the state.

According to a thirteenth aspect of the present invention, in the projection display device, the rear end portion of the base casing is rotatably integrated with the lower portion of the casing, and the base casing is provided behind the rotation shaft. Equipped with an extension part, the screen part can be set in a stored state where the screen part faces the upper surface of the base housing in abutting contact with each other in a parallel state, and a use condition where the housing is erected at an arbitrary angle, and rotated to the screen part. A spring member for urging the shaft around the axis toward the outside of the housing, and means for rotating the base body in the opposite direction to the screen portion around the rotation in association with the rotation of the screen portion The screen portion and the base body are configured to open by setting the above.

According to a fourteenth aspect of the present invention, in the projection display device, the recording / reproducing device is provided in the space on one side opposite to the space on one side including the central portion of the substrate on which the L-shaped projection block is arranged. It is configured to be arranged.

The projection type display device according to a fifteenth aspect of the present invention has a structure in which a telescopic movable hook having a variable length is rotatably housed on the side surface of the housing.

[0029]

In the projection type display device according to claim 1 of the present invention,
In the stored state in which the screen portion and the base body are substantially parallel to the opening end, one of the side plates is fitted inside the other side, and at this time, the projection block fixed to the base body and the screen portion are close to each other, and The thickness of the body is determined only by the substrate, the projection block, the screen, and the minute gaps between them, and the device is extremely thin. At the same time, the side of the projection optical path is made of a rigid side plate to improve appearance and durability.

In the projection type display device according to the second aspect of the present invention, an optical axis bending mirror is arranged between a display medium such as a liquid crystal panel and the projection lens to form an L-shaped projection block.
By projecting this so as to face the reflection mirror, the height (depth) dimension of the housing can be shortened and the housing can be made compact.

Further, in the projection type display device according to the third aspect of the present invention, the projection type display device is constituted by means for opening and closing one of the screen portion and the base body and opening and closing the other. The switching from the stored state to the ornamental state can be performed in one step, and the opening / closing operation is facilitated.

Further, in the projection type display device according to the fourth aspect of the present invention, the function part necessary for the operation of the device is a screen part so that the screen part and the base body are exposed only in a viewing state in which the base is opened at a predetermined angle. Place only on each side of the substrate,
Prevents dust from accumulating and entering during storage and improves appearance.

Further, in the projection type display device according to the fifth aspect of the present invention, by rotating the L-shaped projection block, the projection lens is directed toward the rear surface of the substrate, and front projection display on the external screen is also possible. In addition, it is possible to easily switch between projection on the built-in screen and projection on the external screen.

Further, in the projection display device according to the sixth aspect of the present invention, the focus adjustment ring provided on the outer periphery of the projection lens is rotated from the outside of the housing in a normal state in which the projection lens portion is opposed to the reflection mirror. The movable structure is used to speed up the operation of returning the projection lens to the normal use state of the built-in screen.

Further, in the projection display device according to the seventh aspect of the present invention, the projection lens portion is isolated from the inside of the housing by the box-shaped portion formed extending to the opening of the projection lens rotating portion provided on the base. However, the opening for securing the projection optical path provided on the lower side surface portion is closed by a transparent member to prevent dust or foreign matter from entering the inside of the housing.

Further, in the projection type display apparatus according to the eighth aspect of the present invention, the arm portion which is extended to the lower end of the screen portion and the base body and which is provided so as to project from the lower surface of the housing when housed
The screen part and the base body are configured to be grounded when viewing, and the installation is stabilized without using any secondary means. Improves operability when switching between storage states.

Further, in the projection type display device according to the ninth aspect of the present invention, the corner portion of the inner surface of the lower portion of the base body including the space behind the reflection mirror is extended from the opening provided in either the left or right side plate of the base body. A hollow portion is provided, and the power cord integrated in the device is detachable or housed in this hollow portion, and a power cord storing portion that does not require an opening / closing lid is realized, and the power cord is also stored. It simplifies the operation of switching the usage state.

Further, in the projection type display apparatus according to the tenth aspect of the present invention, the corner portion of the inner surface of the lower portion of the base body including the space behind the reflecting mirror is extended from the opening provided in either the left or right side plate of the base body. A cable holding part is provided at the bottom of the hollow, and the cable that is directly led to the outside through the opening from this holding part and the video camera connected to the end of the cable are stored inside the hollow. The display device and the video camera are reasonably integrated.

Further, in the projection type display device according to the eleventh aspect of the present invention, the range of the lower corner portion of the base body including the space on the back surface of the reflection mirror and the range inside the left and right side plates of the base body by a certain width is provided. As a second base, the second base is rotatably supported by the base, can be locked at a predetermined angle, and is grounded between the housing and the second base, and the second base has a power supply. The circuit portion is configured to be housed, the weight of the second base is increased, and more stable installation is possible, and electric interference with other circuits is avoided.

Further, in the projection type display device according to the twelfth aspect of the present invention, the housing and the base housing are integrated at the front end portion of the base housing so that the lower part of the housing can be rotated back and forth. By tilting the housing to the upper surface of the base housing, the base body is pushed by the upper surface of the base housing and stored in the housing, and the screen portion is also stored in conjunction with it, and the housing is raised from the upper surface of the base housing. The base is opened, and the screen is opened in conjunction with it, and the screen can be rotated back and forth in the opened state to obtain the function of adjusting the angle of the screen and the function of stably installing the housing, and the screen and the base. Make it easy to open and close.

Further, in the projection type display device according to the thirteenth aspect of the present invention, the casing and the base casing are integrated at the rear end of the base casing so that the lower portion of the casing can be rotated back and forth. When the housing is tilted to the upper surface of the base housing, the screen portion is pushed by the upper surface of the base housing to be housed in the housing, and the base body is housed in conjunction therewith, and the housing is raised from the upper surface of the base housing. By doing so, the screen part opens, the base body opens in conjunction with it, and it can be rotated back and forth in the open state, and the extension part prevents falling, and the screen angle adjustment function and the housing are stable. In addition to providing the function to be installed in, the opening and closing operations of the screen portion and the base body can be easily performed, and the screen portion can be protected without using a cover member or the like.

According to the fourteenth aspect of the present invention, the recording / reproducing apparatus is provided in the space on one side opposite to the space on one side including the central portion of the substrate on which the L-shaped projection block is arranged. With the arrangement, the video device can be integrated reasonably within the size range of the display device.

Further, in the projection type display device according to the fifteenth aspect of the present invention, a telescopic movable hook whose length can be varied is rotatably housed on the side surface of the casing, so that the projection type display device can be used for tabletop use.
It can be easily suspended on the seat back of a vehicle.

[0044]

【Example】

Embodiment 1 FIGS. 1 to 5 show a projection display device according to a first embodiment of the present invention. FIG. 1 (a) is an external view showing a viewing state, FIG.
(B) is an external view showing a stored state. FIG. 2A is a cross-sectional view showing a viewing state, and FIG. 2B is a plan view of the rear surface in the arrow direction. In the figure, reference numeral 1 denotes a frame-shaped casing having four side faces and having openings 1a and 1b at the front and rear, respectively, and a screen portion 3 having a screen 2 and a base body 4 are arranged so as to close the openings 1a and 1b. , One end of each is rotatably supported at opposing positions and in opposite external directions. Reference numerals 5 and 6 respectively denote rotating shafts. The screen portion 3
In the viewing state of FIG. 2, it has side plates 3a, 3b, 3c for closing the left and right sides of the housing 1 and the screen section 3 and the lower side. Similarly, the base body 4 also has side plates 4a, 4b, 4c. Reference numeral 7 denotes a projection block fixed to the substrate 4. In this embodiment, the optical axis is bent at a substantially right angle after the concave reflection mirror 8, the light source 9, the condenser lens group 10 and the liquid crystal panel 11 arranged in series. The optical axis bending mirror 12 for
After this, the projection lens 13 is arranged to form an L shape. A reflecting mirror 14 is also fixed to the base 4, and is arranged so as to reflect downward projection light toward the screen 2.

3 to 4 illustrate a mechanism for opening and closing the screen portion 3 and the base body 4. FIG. 3 (a) is a sectional view showing a housed state, and FIG. 3 (b) is a sectional view of a main portion in an ornamental state. It is a figure. In the figure, the side plates 4a, 4b, 4c of the base body 4 are fitted inside the side plates 3a, 3b, 3c of the screen portion 3 during storage. A spring member (not shown) for urging the screen portion 3 in the direction of arrow A is provided on the rotating shaft 5 of the screen portion 3, and the end faces of the side plates 3a and 3b are the base bodies when housed as shown in the drawing. Drive pins 15 provided on the four side plates 4a and 4b
Is in contact with The lower side plate 4c of the base body 4 is provided with locking grooves 16 and 17 having a shape that locks only in the storage direction as shown in FIG.
8, the base body 4 is locked at the storage position and the viewing position. The locking plate 18 is biased in the arrow B direction by a spring member (not shown), and is constantly biased upward by a shaft 20 having an arm 19. Reference numeral 21 denotes a lock release lever pivotally attached to the shaft 20, and the biasing force of the locking plate 18 is released by rotating the lock release lever in the arrow direction indicated by the broken line. Therefore, when the base 4 is opened, the drive pin 15 is moved to the side plate 3 of the screen portion 3.
Pressing a and 3c, they are interlocked with the substrate 4 and opened in the state of FIG. 2 (a). Further, when the base body 4 is closed, the screen portion 3 is closed by the biasing force of the spring member so that the side plates 3a and 3b follow the drive pin 15 and interlock with the base body 4 to the state shown in FIG.

FIG. 4 is a perspective view of the rear surface showing an ornamental state. In the figure, a concave portion 4d is provided on the outer surface of the base body 4 on the rear surface of the reflection mirror 14, and a rib-shaped grip portion 22 is provided in the concave portion 4d. Further, on the inner surface side of the base of the recess 4d, as shown in FIG.
The reflection mirror 14 is held as shown in FIG. Also,
Reference numeral 25 denotes a leg body that is rotatably supported on the lower left and right sides of the base body 4, and is pulled out from the outer shape range of the base body 4 at the time of viewing to project and ground as shown in the figure, and the projection block 7 is fixed at the time of viewing. By opening 4, the apparatus can be installed stably even if the center of gravity of the apparatus moves to the rear.

With the above structure, when the housing is housed, the leg 25 is placed within the outer shape of the base body 4 and the base body 4 is pushed toward the housing 1 so that the screen portion 3 is also interlocked with the body 1 to prevent depth (thickness). ), The handle portion 22 of the base body 4 is pulled and locked at the viewing position during viewing. At this time, the screen portion 3 is also interlocked and locked at the viewing position. Therefore, the screen 2, the reflection mirror 14, and the projection block 7 are set in a positional relationship capable of being projected and displayed as shown in FIG. it can.

In the above embodiment, the projection block 7 is L-shaped, but depending on the screen size, if the optical length can be shortened to some extent by the lens design of the optical system, the optical axis bending mirror 12 as shown in FIG. It may be a projection block in series without using it.

In the above embodiment, the screen portion 3 is opened and closed in conjunction with the opening and closing of the base body 4, but the base portion 4 is opened and closed as the screen portion 3 is opened and closed. Good. Further, if slight deterioration in operability is allowed, it is naturally possible to open and close each separately.

Embodiment 2 FIG. 6 shows a projection type display device according to a second embodiment of the present invention. The purpose of this embodiment is to improve the appearance and reliability of the device when it is stored and carried. FIG. 6A is a perspective view of a rear surface showing a viewing state, and FIG. 6B is a side view of a main part showing the viewing state. In the figure, 23 is a sound emission hole of a speaker (not shown), which is a side plate 3a, 3b of the screen portion 3.
It is provided to the side. 24 is an input / output terminal,
It is also attached to the side plate 4b of the base body 4 so as to be directed laterally. Reference numeral 26 is a heat dissipation hole provided on the lower side surface 4c of the base body 4, and 27 is a heat dissipation hole provided on the left and right side plates 4a and 4b of the base body 4. Since the heat dissipation hole 27 secures an opening area,
As shown in FIG. 6B, the housing 1 is provided in an overlapping range, and a notch 28 is provided on the side surface of the housing 1 to secure a heat radiation space. Reference numeral 29 is a flap portion for closing the cutout portion 28 when the base body 4 is in the housed state.

With the above structure, the side plates 3a, 3b, 3c of the screen portion 3 and the side plates 4a, 4 of the base body 4 are provided at the time of viewing.
b and 4c are exposed, and therefore the sound emission hole 2 of the speaker
3, the input / output terminal 24, and the heat dissipation holes 26 and 27 are exposed. Further, the heat radiation holes 26 are provided in the side plate 4c having a certain height from the ground plane, and the heat radiation holes 27 are the side plates 4a, 4 which are the upper ends of the apparatus.
Since it is provided in b, effective intake and exhaust is possible. At the time of storage, the above-mentioned functional parts required for the operation of the apparatus are completely hidden, the appearance is remarkably improved, and the accumulation of dust and the intrusion of dust can be prevented, so that the reliability can be improved.

Embodiment 3 FIGS. 7 to 9 show a projection type display device according to a third embodiment of the present invention. FIG. 7A is a cross-sectional view showing an ornamental state, FIG.
(B) is a plan view of the rear surface in the arrow direction. 8 is a perspective view of the rear surface at the time of viewing, and FIG. 9 is a sectional view at the time of front projection. The present embodiment is intended to realize a device capable of both rear projection display on the built-in screen 2 and front projection display on an external screen with a simple configuration as in the above embodiments. is there. In the figure, 30 is an L-shaped projection block, and the configuration of the optical system is the same as that of the first embodiment,
The projection lens unit 31 is attached to the front end portion 30a of the projection block 30 and is provided with a focus adjustment ring 31 so that it can be adjusted back and forth.
a is provided. In addition, the projection block 30 is the base 4
Is rotatably supported by two bearings 32, 33 provided on the base 3, a rotary knob 34 is provided at one end, and a part is exposed from a through hole 35 provided in the base 4. The front end portion 30a of the projection block 30 including the projection lens unit 31
Has a structure in which it is isolated from the inside of the housing 1 by a box-shaped portion 37 formed by extending from the periphery of the opening 36 provided in the base 4. Reference numeral 38 denotes a transparent member that closes the opening 39 provided on the lower side surface portion to form a passage for projection light.
Reference numeral 40 denotes an opening / closing cover that covers the opening 36. In the closed state (solid line) of FIG. 8, the focus adjustment ring 31 of the projection lens unit 31 is shown.
Part of a is exposed from the through hole 40a provided in the opening / closing cover 40.

With the above structure, in addition to the usual rear projection display, front projection display as shown in FIG. 9 is also possible. In order to switch from the normal state to the front projection, the opening / closing cover 40 is opened, the projection block 30 is rotated rearward by the rotary knob 34, and the focus adjustment ring 31 a protruding from the outer surface of the base body 4 is opened.
Is adjusted to form an image on the external screen 41. Normally, if the rear projection is directly changed to the front projection, the left and right of the screen are reversed. Therefore, circuit means for inverting the image on the liquid crystal panel left and right is necessary. In the present embodiment, since the projection direction is changed from front to back by 180 °, it can be used for both purposes with a simple structure without the circuit means. In order to switch from this state to the normal rear projection, the projection block 30 is returned to the position for normal use facing the reflection mirror, and the opening / closing cover 40 is closed. In this case, it is necessary to readjust the focal length of the projection lens 31, but since the focus adjustment ring 31a is exposed from the through hole 40a, an image can be easily formed while watching the screen of the screen. Further, even if the above two uses are performed, since the inside of the housing 1 is isolated from the projection block 30, there is no risk of dust or foreign matter entering.

In the above embodiment, the focus adjustment ring 31a is rotatable from the outside of the substrate 4 at the normal use position where the projection block 30 faces the reflection mirror 14, but this is a problem in appearance and operability. If the deterioration of the above can be tolerated, the width of the opening 36 may be widened to the extent that a finger can be inserted, and adjustment can be performed within the box-shaped portion 37.

In the above embodiment, the box-like portion 37 extending from the periphery of the opening 36 is formed so as to be isolated from the inside of the housing 1. However, it is premised that the inside of the housing 1 is cleaned. In the case of the above design, the box-shaped portion 37 may be omitted.

Embodiment 4 FIGS. 10 and 11 show a projection type display device according to a fourth embodiment of the present invention. FIG. 10 is a cross-sectional view for explaining the configuration, and FIG. 11 is a front perspective view showing an ornamental state. The purpose of this embodiment is to obtain an apparatus that can be switched between the ornamental state and the stored state immediately and that can be installed more stably without using secondary means. In the figure, 41,
Reference numeral 42 denotes an arm portion that extends to the lower ends of the screen portion 3 and the base body 4 and is provided so as to project from the lower surface of the housing 1. The lower ends of the arm portions 41 and 42 are hook-shaped base portions 41, respectively.
a and 42a are provided. In this embodiment, the base 4
An opening / closing structure (not shown) having the same configuration as that of the first embodiment that opens / closes the screen portion 3 in conjunction with the opening / closing is provided.

With the above structure, the screen portion 3 and the base 4
13 from the storage state shown by the solid line in FIG. 13 to the viewing state shown by the alternate long and short dash line, the base 4 protruding from the lower surface of the housing 1
By holding the base portion 42a of the arm portion 42 and pulling it in the rearward direction, the screen portion 3 is also pulled out in conjunction,
Locked in the viewing position. The reverse operation is enough to put it in the stored state. In the viewing state, each of the bases 41a and 42a has the housing 1
By being designed to be the same as or below the lower surface of the base, the base parts 41a, 42a and the lower surface of the housing 1
It is grounded at a point or at two points of the bases 41a and 42a. In any case, the outermost portion protruding in the front and rear will be grounded, and more stable installation is possible.

In the above-mentioned embodiment, the opening / closing structure in which the screen portion 3 is opened in conjunction with the base body 4 has been described. However, even if the screen portion 3 and the base body 4 can be opened / closed separately, the base portion 41a can be opened with both hands. By opening and closing 42a in the opposite direction, the screen portion 3 and the base body 4 can be opened and closed at the same time.

12 and 13 show another mode of the fourth embodiment. FIG. 12 is a sectional view for explaining the structure and FIG. 13 is a perspective view showing a housed state. In the arm portions 41, 42,
The step portions 43 and 44 are provided in directions facing each other, and the handle holes 43a and 44a are provided in the respective step portions 43 and 44. Therefore,
In the viewing state shown by the alternate long and short dash line in FIG.
Is grounded before and after the housing 1, and the stepped portion 4 is shown at the time of storage indicated by the solid line.
3, 44 face each other and approach each other. In this state, as shown in FIG. 13, the hands can be passed through the handle holes 43a and 44a, and the arm portions 41 and 42 can have both the function of the leg and the function of the handle.

Embodiment 5 FIGS. 14 to 16 show a projection type display device according to a fifth embodiment of the present invention. This embodiment is intended to rationally store the power cord in the device. FIG. 14 is a perspective view of the rear surface in an ornamental state. In the figure, reference numeral 44 denotes a cavity portion provided in a range surrounded by the reflection mirror 14 and the lower portion of the base body 4 and the lower side plate 4c, and provided in the side plate 4b of the base body 4. It is formed so as to extend from the opening 45. Reference numeral 46 denotes a power supply socket for the device provided on the base 4,
7 plug 47a is connected and used. Therefore, when not in use, it can be detached from the device and inserted into the cavity 44, and by locking the base body 4 at the storage position, it can be stored reasonably without the need for an opening / closing lid or the like.

FIG. 15 shows another mode of the fifth embodiment, which is a perspective view of the rear surface of the viewing state, in which the hollow portion 44 is formed.
From the cord holder 44a provided on the bottom of the opening to the opening 4
The power cord 47 is directly led out through the wiring 5. The power cord 47 is wound around in a spiral shape and is expandable and contractible as shown in the drawing. Therefore, when used, it is stretched out of the hollow portion 44 and used, and when stored, it is housed in the hollow portion 44 by a contracting force, so that the attaching / detaching operation of the power cord 47 and the device is unnecessary.

FIG. 16 illustrates a structure for preventing the power cord 47 housed from the opening 45 from protruding until the base 4 is locked at the housed position.
16A is a plan view of a main part, and FIG. 16B is a sectional view thereof. In the figure, reference numeral 48 denotes an elastic member having an inner diameter smaller than the diameter of the opening 45 and capable of expanding the inner diameter by pushing and expanding. The elastic member 48 is attached so as to cover the opening 45. Therefore, by expanding the deformable portion 48a and inserting the power cord 47 into the cavity portion 44,
The repulsive force of the power cord 47, which tends to protrude to the outside, can be blocked by the deforming portion 48a, and the base body 4 can be housed in the housing 1 without hindrance.

Embodiment 6 FIG. 17 shows a projection type display device according to a sixth embodiment of the present invention. The figure is a perspective view of the rear surface in an ornamental state. The present embodiment is intended to reasonably integrate a video camera into the display device. In the figure, the reflection mirror 14 is extended from an opening 49 provided in the side plate 4a of the base body 4.
A video camera is provided at the end of the cable 51, which is directly led out through the opening 49 from the cable holding portion 50a provided at the bottom of the cavity 50 provided in the lower portion of the base body 4 and in the range surrounded by the lower side plate 4c. 52 is connected. The cable 51 is formed in a spiral shape so that it can be expanded and contracted, and the video camera 52 at the tip can be housed in the cavity 50. Therefore, when used, the video camera 52 is pulled out and fixed to a housing or the like as shown in the figure, and when housed, the cable 51 and the video camera 52 are housed in series in the cavity 50 by the contracting force of the cable 51. . In reality, if a recording / playback device such as a VTR is integrated with this device to monitor the playback image of the VTR and the subject image of the video camera 52 on the screen unit 3, it can be used for various purposes. It can be a device.

Embodiment 7 FIGS. 18 and 19 show a projection display device according to a seventh embodiment of the present invention. In this example, the stability of the installation and the performance of the device,
The purpose is to improve reliability. FIG. 18 is a perspective view of the rear surface of the viewing state, and FIG. 19 is a cross-sectional view of the main part in the viewing state. In the figure, reference numeral 53 denotes a second base body rotatably supported in a range surrounded by the reflection mirror 14 and the lower portion of the base body 4 and the lower side plate 4c, and within a certain width inside the left and right side plates 4a and 4b. In addition, there is a means (not shown) capable of being locked at the storage position where it abuts on the base body 4 and at the use position where the tip end portion 53a is in contact with the lower surface of the housing 1 and is grounded as shown in FIG. The second base 53 is formed in a housing structure,
The power supply circuit section 54 is housed inside, and is connected (not shown) to the inside of the apparatus via the rotating shaft 53b. Further, the input / output terminal 55 is provided on the outer surface of the base body 4 with which the second base body 53 abuts at the storage position, and further, the upper surface 53c of the second housing abutting the base body 4 and the lower surface 53d facing the upper surface 53c. Further, a heat radiation hole 56 is provided.

In the above structure, when the second base 53 is locked in the storage position and the base 4 is stored and locked in the housing 1, the input / output terminals 55 and the heat radiation holes 56 are all covered and protected.
The appearance and reliability can be improved. 19 shows the base body 4 locked in the ornamental position and the second base body 53 locked in the use position.
In this state, the input / output terminal 55 and the heat dissipation hole 56 are exposed, and the state becomes usable. At this time, the second base body 53 including the power supply circuit unit 54 moves downward, so that the center of gravity of the device moves downward and backward. Therefore, in addition to more stable installation, the power supply circuit section 54 can be operated at a position separated from the main body of the apparatus, so that electrical interference with the signal circuit in the apparatus can be avoided and the performance can be improved.

FIG. 20 shows another embodiment of the seventh embodiment, which is a perspective view of the rear surface of the viewing state, in which the side surface 57 of the second base 53 is provided with an opening 57a. Part 5
A hollow portion 58 extending inward from 7a is provided, a holding portion 58a is provided at the bottom of the hollow portion 58, and the power cord 59 is directly led to the outside through the opening 57a. The power cord 59 is wound around in a spiral shape and is expandable and contractable similarly to the sixth embodiment. Therefore, when used, it can be used by being stretched out of the cavity 58, and can be stored in the cavity 58 by a contracting force when it is stored. Therefore, by simply locking the second base 53 at the storage position, the opening / closing lid, etc. Can be stored without need.

Embodiment 8 FIGS. 21 and 22 show a projection display device according to an eighth embodiment of the present invention. FIG. 21 is a side view of the viewing state, FIG. 22 (a)
FIG. 22B is a perspective view of an ornamental state, and FIG. 22B is a perspective view of a housed state. The present embodiment relates to a means capable of immediately switching between the stored state and the viewing state, and enabling stable installation and adjustment of the viewing angle. In the figure, reference numeral 60 denotes a base casing, and the casing 1 and the base casing 60 are integrated so that the casing 1 can be rotated around a rotation shaft 60a at the front end portion of the base casing 60. Then, the housing 1 is configured to be locked at an arbitrary angle. Similar to the first embodiment, the base body 4 and the screen portion 3 are provided with means (not shown) for rotating the screen portion 3 in association with the rotation of the base body 4.

With the above configuration, FIG. 21 or FIG.
When changing from the ornamental state shown in FIG.
22 to the upper surface of the base casing 60, the base 4 comes into contact with the base housing 60 first, and the base 4 is pushed to rotate to the storage position. In conjunction with this, the screen portion 3 also rotates to the storage position. The state of b) is stored. In the case of the viewing state, the base 4 and the screen portion 3 are opened by the reverse operation, and the viewing state of FIG. In the device like this embodiment, since the projection block 7 and the circuit portion are arranged on the side of the base body 4, the center of gravity of the device exists at the rear side, so that the housing 1 is moved from the substantially vertical position to the base housing 60. The stability can be maintained even if the contact is rotated within the range until the contact, and the viewing angle can be adjusted within this range. Reference numeral 61 denotes a stepped portion provided in the housing 1, which is for face-to-face contact with the base housing 60 in the housed state, and is not necessary when it is formed into a plate shape except the side plate 60b of the base housing 60.

FIG. 23 shows another mode of the eighth embodiment. Reference numeral 62 denotes a cover panel rotatably supported at the rear end of the base casing 60. 60 and the cover panel 62 to cover the entire surface of the housing 1,
The cover panel 62 shown by the alternate long and short dash line is configured to be combined with the base housing 60. Therefore, when carrying, the base housing 60 and the cover panel 62 function as a storage case.

Embodiment 9 FIG. 24 shows a projection type display device according to a ninth embodiment of the present invention. FIG. 24 (a) is a side view showing an ornamental state, and FIG. 24 (b) is a perspective view showing a housed state. The present embodiment is intended to provide a means for protecting the screen portion during storage without using the cover panel 62 as in the eighth embodiment. It is also intended to add a new function to the base casing. In the figure, the housing 1 and the base housing 63 are integrated so that the housing 1 can be rotated around the rotation shaft 63a at the rear end portion of the base housing 63.
An extension 64 is provided at the rear of the rotary shaft 63a.
Like the eighth embodiment, the housing 1 is configured to be locked at an arbitrary angle. However, the substrate 4 and the screen portion 3 are the same as those in the eighth embodiment.
In the opposite configuration, the base 4 is interlocked with the rotation of the screen portion 3.
Is provided with means for rotating (not shown). Extension 64
A power circuit section 65 is housed in the housing 1, a DC power is supplied to the inside of the housing 1 through the rotary shaft 63a, and a handle hole 66 is provided in the center of the extension 64.

With the above configuration, when the housing 1 is put in the storage state, by tilting the housing 1 to the upper surface of the front base housing 63,
The screen portion 3 closes, and the base body 4 closes in conjunction. At this time, the screen portion 3 is covered with the base casing 63, and the user can carry the hand through the handle hole 66 with the casing 1 facing down. By performing the reverse operation, the viewing state shown in FIG. 24A can be obtained, and the viewing angle can be adjusted. At this time, the extension portion 64 is grounded to the protruding range of the base body 4, and due to the weight of the power supply circuit portion 65, there is no fear of tipping over even if the housing 1 is tilted rearward. Further, since the power supply circuit section 65 having the oscillation circuit is separated from the main body housing 1, it is easy to avoid interference with the signal circuit in the main body housing 1.

In the above embodiment, the power supply circuit section 65 is housed in the extension section 64. However, if the weight balance can be secured only by the base casing 63 and the problem of electrical interference is solved by another method, it is not always necessary. It is not necessary to house the power supply circuit section 65 in the extension section 64.

In the above embodiment, the extension portion 64 has a handle hole 66.
Is provided so that it can be carried as a handle,
It is not always necessary when applied to a lightweight device with a small screen size.

Embodiment 10 FIGS. 25 and 26 show a projection display device according to a tenth embodiment of the present invention. FIG. 25 is a plan view of the rear surface, and FIG. 26 is a perspective view of the rear surface showing the viewing state. The present embodiment relates to a display device in which a recording / reproducing device is integrated, and is intended to obtain a compact device, and another display device which faces the L-shaped projection block 7 having a projection lens unit 31 in the central portion is provided. A recording / playback device 67 is fixed on the base body 4 in one space. Reference numeral 68 denotes a cassette insertion portion, which is configured so that the cassette tape 69 is taken in and out from above the outer surface of the base body 4.

FIG. 27 is a cross-sectional view at the time of viewing, and the recording / reproducing device 67 is moved away from the screen portion 3 as the substrate 4 moves, and is therefore operated at a position where it does not interfere with the projection light cone from the projection lens 31. . With such an arrangement, the recording / reproducing device can be reasonably accommodated within the range of the housing size determined by the size of the screen.

In the above embodiment, the recording / reproducing apparatus using the tape as the recording medium has been described, but it goes without saying that the recording / reproducing apparatus using the disk type recording medium can also have the same structure.

Embodiment 11 FIGS. 28 and 29 show a projection display device according to an eleventh embodiment of the present invention. FIG. 28 is a perspective view seen from the rear surface, and FIG. 29 is a schematic view showing a state of viewing in the vehicle. This embodiment is intended to improve usability in a vehicle such as an automobile. In the figure, reference numeral 70 denotes a movable hook that is housed in a housing part 71 provided on the left and right side surfaces of the housing 1 and is rotatably supported. The movable hook has a telescopic part 72 and a hook-shaped part 7 at the tip.
2a. The expansion / contraction part 72 is held by means (not shown) capable of being locked at an arbitrary position.

With the above construction, when the movable hook 70 is not used, it is housed in the housing 1 shown by the alternate long and short dash line in FIG. 28, and when it is used in the vehicle, it is pulled out to the position indicated by the solid line, and the thickness of the seat back 73 of the vehicle is increased. 29. Adjust the expandable part 72 according to the
Hang it from above and fix it. By adopting the viewing mode as shown in the figure, it is possible to watch in any posture without having to hold the device by hand. Incidentally, in such a usage pattern,
Although the base 4 comes into contact with the seat back 73, the input / output terminals 24 and the heat radiation holes 26 and 27 are arranged on the side plates 4a and 4b of the base as in the third embodiment, so that there is no problem in use. In the case of general viewing used on a table or the like, since the movable hook 70 is stored in the storage portion 71, there is no problem.

[0079]

Since the present invention is configured as described above, it has the following effects.

According to the projection type display device of claim 1,
In a stored state in which the screen portion and the base body are substantially parallel to the opening end, one of the side plates is fitted inside the other side, and the projection block fixed to the base body and the screen portion are close to each other.
The thickness of the housing is determined only by the base, the projection block, the screen, and the minute gaps between them, and can be made extremely thin. In addition, in the viewing state, since the side of the projection optical path is closed by the screen side and the rigid side plate provided on the substrate, the problems of appearance and durability that occur in the conventional example can be solved.

According to another aspect of the projection display device of the present invention, an optical axis bending mirror is arranged between a display medium such as a liquid crystal panel and the projection lens to form an L-shaped projection block, which is the reflection mirror. Since the projection display is made to face, the height (depth) dimension of the housing can be shortened and the apparatus can be made extremely compact.

Further, according to the projection type display device of the third aspect, the opening / closing of either the screen portion or the base body is accompanied by the opening / closing operation of the other portion. Therefore, the storage state and the viewing state can be switched in one step, and the opening / closing operation can be simplified.

According to another aspect of the projection display device of the present invention, the functional unit necessary for operating the device is a screen unit,
To expose the substrate only to the viewing state where it opens at a specified angle,
Since it is arranged only on each side of the screen part and the base, it is possible to prevent dust from accumulating on the input / output terminals during storage, storage or carrying, and from entering through the heat dissipation holes. In addition to being able to enhance the reliability of the device, the appearance of the device during storage is significantly improved.

According to the projection type display device of the fifth aspect, by rotating the L-shaped projection block,
Since the projection lens is oriented toward the back of the substrate and front projection display is possible on an external screen, it can be used for a variety of purposes and can immediately switch between projection on the built-in screen and projection on the external screen. Therefore, it is extremely easy to use.

Further, according to the projection type display device of the sixth aspect, the focus adjustment ring provided on the outer circumference of the projection lens is rotated from the outside of the housing in a normal state in which the projection lens unit is opposed to the reflection mirror. Because of the movable structure, when returning from the front projection use to the external screen to the normal use condition of the built-in screen, the focal position of the projection lens can be returned extremely quickly.

According to the projection type display device of the seventh aspect, the projection lens portion is isolated from the inside of the housing by the box-shaped portion formed extending to the opening of the projection lens rotating portion provided on the base. ,
Since the opening for securing the projection optical path provided on the lower side part is closed with a transparent member, it is possible to prevent dust and foreign matters from entering the inside of the housing when using front projection on an external screen, The reliability of the device can be increased.

According to the projection type display device of the eighth aspect, each arm portion is grounded at the time of viewing by the arm portion which is extended to the lower end of the screen portion and the base body and protrudes from the lower surface of the housing when housed. Since it is configured like this, not only can the device be installed stably without using secondary means, but also the viewing state can be achieved by simply opening and closing one arm.
Since the storage state can be switched, operability is extremely good.

Further, according to the projection type display device of the ninth aspect, the corner portion of the inner surface of the lower portion of the base body including the space behind the reflection mirror is extended from the opening provided in either the left or right side plate of the base body. A cavity is provided, and the cavity is removable.
Alternatively, since the power cord integrated in the device is stored, the opening / closing lid and the like are not required, and a rational power cord storing portion can be realized.

Further, according to the projection type display device of the tenth aspect, the corner portion of the inner surface of the lower portion of the base body including the space behind the reflecting mirror is extended from the opening provided in either the left or right side plate of the base body. A configuration in which a cavity is provided, a cable holding part is provided at the bottom of the cavity, and a cable that is directly led to the outside through an opening from this holding part and a video camera connected to the end of the cable are housed in the cavity. Therefore, it is possible to obtain a display device in which a video camera is reasonably integrated, and a device that can cope with a new application can be obtained by simultaneously integrating a recording / reproducing device.

Further, according to the projection type display device of the eleventh aspect, in the range of the lower corner portion of the base body including the space on the back surface of the reflection mirror, and within a certain width inside the left and right side plates of the base body. As a second base, the second base is rotatably supported by the base, can be locked at a predetermined angle, and is grounded between the housing and the second base, and the second base has a power supply. Since the circuit portion is configured to be housed, it can be installed more stably, and the second housing is separated from the main body portion, so that electrical interference with other circuits can be avoided.

According to the projection type display device of the twelfth aspect, the casing and the base casing are integrated at the front end of the base casing so that the lower portion of the casing can be rotated back and forth. By tilting the housing to the upper surface of the base housing, the base body is pushed by the upper surface of the base housing and stored in the housing, and the screen portion is also stored in conjunction with the base body, and the housing is raised from the upper surface of the base housing. Since the base is opened, the screen part is opened in conjunction with it, and it is possible to rotate back and forth in the open state, so the viewing angle can be freely selected, the device can be installed more stably, and the screen part and the base The opening / closing operation of is extremely easy.

According to the projection type display device of the thirteenth aspect, the casing and the base casing are integrated at the rear end of the base casing so that the lower portion of the casing can be rotated back and forth. When the housing is laid down on the upper surface of the base housing, the screen portion is pushed by the upper surface of the base housing to be housed in the housing, and the base body is housed in conjunction therewith, and the housing is raised from the upper surface of the base housing. Thus, the screen portion is opened, the base body is opened in conjunction with it, and it is configured to be rotatable back and forth in the opened state, and the extension portion is configured to prevent falling, so that the viewing angle can be freely selected, The device can be installed more stably,
The opening / closing operation of the screen part and the base becomes extremely simple, and the screen part can be protected without using a cover panel.

Further, according to the projection type display device of the fourteenth aspect, the recording / reproducing device is arranged in the space on one side opposite to the space on one side including the central portion of the substrate on which the L-shaped projection block is arranged. Since it is configured to be installed, the video device can be integrated reasonably within the size range of the display device,
The device can be made compact.

Further, according to the projection type display device of the fifteenth aspect, since the telescopic movable hook whose length is variable is rotatably housed on the side surface of the housing, it is possible to use the tabletop in addition to the tabletop use. It can be easily suspended and used for vehicle seat backs, etc., and can be used for various purposes.

[Brief description of drawings]

1A and 1B show a projection display apparatus according to a first embodiment of the present invention, FIG. 1A is a perspective view showing a viewing state, and FIG. 1B is a perspective view showing a storage state.

2A and 2B show a projection type display device according to a first embodiment of the present invention, FIG. 2A is a sectional view showing a viewing state, and FIG. 2B is a plan view of a rear surface.

3A and 3B show a projection display apparatus according to a first embodiment of the present invention, FIG. 3A is a sectional view for explaining an opening / closing mechanism, and FIG. 3B is a sectional view of a main part showing a viewing state.

FIG. 4 is a rear perspective view showing the viewing state of the projection display apparatus according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing another embodiment of the projection block of the projection type display apparatus according to the first embodiment of the present invention.

6A and 6B show a projection display apparatus according to a second embodiment of the present invention, FIG. 6A is a side view of a main part, and FIG. 6B is a perspective view of a rear surface.

7A and 7B show a projection display apparatus according to a third embodiment of the present invention, FIG. 7A is a sectional view showing a state of viewing, and FIG. 7B is a plan view of a rear surface.

FIG. 8 is likewise a perspective view of the rear surface of the projection display device according to the third embodiment of the present invention in a viewing state.

FIG. 9 is a sectional view showing a front projection state of a projection display apparatus according to a third embodiment of the present invention.

FIG. 10 is a sectional view showing a housed state of a projection display apparatus according to a sixth embodiment of the present invention.

FIG. 11 is a perspective view showing a viewing state of a projection display apparatus according to a sixth embodiment of the present invention.

FIG. 12 is a sectional view showing a housed state of a projection type display device showing another mode of the sixth embodiment of the present invention.

FIG. 13 is a perspective view showing a viewing state of a projection type display device showing another aspect of the sixth embodiment of the present invention.

FIG. 14 is a rear perspective view showing a viewing state of a projection display apparatus according to a seventh embodiment of the present invention.

FIG. 15 is a perspective view of a rear surface showing a viewing state of a projection display device showing another aspect of the seventh embodiment of the present invention.

FIG. 16 is a projection type display device showing another mode of the seventh embodiment of the present invention, (a) is a plan view of a main part, and (b) is a sectional view.

FIG. 17 is a rear perspective view showing a viewing state of the projection display apparatus according to the eighth embodiment of the present invention.

FIG. 18 shows a projection type display device according to a ninth embodiment of the present invention, (a) is a perspective view showing a state of viewing, and (b) is a side view.

FIG. 19 is a sectional view of an essential part of a projection display device according to a ninth embodiment of the present invention.

FIG. 20 is a rear perspective view showing a viewing state of a projection display device showing another aspect of the ninth embodiment of the present invention.

FIG. 21 is a side view showing a viewing state of the projection display apparatus according to the tenth embodiment of the present invention.

22A and 22B show a projection display device according to a tenth embodiment of the present invention, FIG. 22A is a perspective view showing a viewing state, and FIG. 22B is a perspective view showing a storage state.

FIG. 23 is a side view showing a viewing state of a projection display device showing another aspect of the tenth embodiment of the present invention.

24A and 24B show a projection display apparatus according to an eleventh embodiment of the present invention, FIG. 24A is a side view showing a viewing state, and FIG. 24B is a perspective view showing a storage state.

FIG. 25 is a plan view of the rear surface of the projection display apparatus according to the twelfth embodiment of the present invention.

FIG. 26 is a rear perspective view showing a viewing state of the projection display apparatus according to the twelfth embodiment of the present invention.

FIG. 27 is a cross-sectional view showing a viewing state of the projection display apparatus according to the twelfth embodiment of the present invention.

FIG. 28 is a rear perspective view showing a viewing state of the projection display apparatus according to the thirteenth embodiment of the present invention.

FIG. 29 is a schematic view showing an in-vehicle viewing state of the projection display apparatus according to the thirteenth embodiment of the present invention.

FIG. 30 is a perspective view showing a conventional projection display device.

FIG. 31 is a side sectional view showing a conventional projection display device.

[Explanation of symbols]

1 housing, 2 screen, 3 screen section, 3a,
3b, 3c, 4a, 4b, 4c Side plate, 4 Base body, 7
Projection block, 12 Optical axis bending mirror, 14 Reflection mirror, 15 Drive pin, 23 Audio emission hole, 24 Input / output terminal, 26, 27 Heat dissipation hole, 30 Projection block, 31
a projection lens unit, 31 focus adjustment ring, 36, 39
Opening, 37 Box-shaped part, 38 Transparent member, 41, 42
Arm part, 44, 50 Cavity part, 45 Opening part, 50a
Cable holding part, 51 cable, 52 video camera, 53 second base, 54 power supply circuit part, 60 base housing, 60a, 60a rotating shaft, 63 base housing,
64 extension part, 67 recording / reproducing device, 70 movable hook, 71 storage part.

[Procedure amendment]

[Submission date] October 18, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Claim 13

[Correction method] Change

[Correction content]

Claims (15)

[Claims] 1. A frame-shaped housing having four side surfaces, a screen portion and a base body, each of which is provided with a side plate on its periphery, are arranged so as to close the front and rear open ends of the housing. When the mirror is fixed, the screen portion and one end of the base body are supported so as to be rotatable in opposite external directions, and the screen portion and the base body are in a position substantially parallel to the opening end. In a viewing state in which the side plate is fitted inside the other side and the screen portion and the base body are opened at a predetermined angle, each side plate blocks the side of the projection light path, and the projection light from the projection block is reflected by the reflection mirror. A projection display device, characterized in that it is set in a state in which a transmitted image can be viewed by forming an image on the screen of the screen section. 2. An L-shaped projection block is formed by disposing an optical axis bending mirror between a display medium such as a liquid crystal panel and a projection lens, and the L-shaped projection block is arranged so as to face the reflection mirror. 1. The projection display device according to 1. 3. The apparatus according to claim 1, further comprising means for interlocking the opening and closing of the screen portion or the base body with the opening and closing of the other portion.
The projection display device described. 4. A screen portion, an ornamental state in which a base is opened at a predetermined angle, and an input / output terminal for exposing only this ornamental state,
3. The projection display apparatus according to claim 1, wherein the heat radiation hole, the sound emission hole of the speaker, and the like, which are required to operate the device, are arranged only on the screen portion and the side surface portion of the base. 5. An L-shaped projection block is formed as an integral unit, which is rotatably supported by a base and is opposed to a reflection mirror, and in addition to the rear projection display, a projection lens is oriented in the rear direction of the base. The projection display device according to any one of claims 1 to 4, wherein front projection display is possible on an external screen at an angle of. 6. The focus adjustment ring provided on the outer periphery of the projection lens unit is rotatable from the outside of the housing in a normal state in which the projection lens unit faces the reflection mirror. 5. The projection display device according to item 5. 7. An opening provided in the base for rotating the projection lens toward the rear side of the base, and a box-shaped portion extending to the opening to separate the projection lens from the inside of the housing and 7. The projection type display device according to claim 5, wherein an opening for securing a projection optical path provided on the side surface of said is closed with a transparent member. 8. The screen portion is extended to the lower end of the base,
8. The projection display device according to claim 1, further comprising an arm portion projecting from a lower surface of the housing when the housing is housed, and each arm portion is grounded when viewing. 9. A cavity extending from an opening provided in any one of the left and right side plates of the substrate is provided at a corner of the inner surface of the substrate lower part including the space behind the reflecting mirror, and the cavity is detachable. Alternatively, the power cord integrated with the device is housed.
The projection display device according to any one of 1. 10. A corner portion of an inner surface of a lower portion of the base body including a space behind the reflection mirror is provided with a cavity portion extended from an opening provided in either side plate of the base body, and a cable holding portion is provided at a bottom portion of the cavity. 4. A video camera connected to the end of a cable, which is provided with the above-mentioned holding part and is led out to the outside directly through the opening, so that the cable and the video camera can be stored in the cavity. 9. The projection display device according to any one of 9 above. 11. A second base is defined as a range of a lower corner portion of the base body including a space behind the reflecting mirror and a range inside the left and right side plates of the base body by a certain width.
Rotatably supporting the base body on the base body so that the base body can be locked at a predetermined angle, and the housing and the second base body are grounded, and
The projection display device according to any one of claims 1 to 7, 9 and 10, wherein a circuit portion such as a power supply circuit is housed in the second base. 12. The housing is integrated with the front end of the base housing so that it can be rotated back and forth around the lower part of the housing, and the base side faces and abuts the upper surface of the base housing so that the base and the base housing face each other. It is possible to set the stored state in which the body is held in a parallel state and the use state in which the housing is erected at an arbitrary angle, and the base body is provided with a spring member for urging the housing shaft toward the outside of the housing. And a means for rotating the screen portion in a direction opposite to the base body about the rotation axis in conjunction with the rotation of the base body, and by putting it in the housed state, the base body and the screen unit are housed in the housing, The base body and the screen portion are opened by being set in a use state.
1. The projection display device according to any one of 1. 13. A housing is integrated with a rear end portion of a base housing so as to be rotatable back and forth around a lower portion of the housing, and an extension portion of the base housing is provided behind the rotation shaft. The screen part can be set to a stored state in which the screen part side is abutted against the upper surface of the base housing so that the housing and the base housing are held in a parallel state, and a usage state in which the housing is erected at an arbitrary angle. A spring member for urging the rotating shaft as a center toward the outside of the housing, and means for rotating the base body in a direction opposite to the screen part about the rotating shaft in conjunction with the rotation of the screen part. 8. The base and the screen portion are opened by being put in use.
Any of claims 9 to 10 14. A recording / reproducing device is arranged on a substrate on one side including a central portion of the substrate on which the L-shaped projection block is arranged, and on a substrate on the other side opposite to this space. The projection display device according to claim 1. 15. The projection display device according to claim 1, wherein a telescopic movable hook having a variable length is rotatably housed on a side surface of the housing.