JPH023556A - Television device for vehicle - Google Patents

Abstract

PURPOSE:To enable projection of a large picture by a method wherein, in a device in which a screen for projection is mounted to the back side of the seat back of a front seat in a vehicle and a liquid crystal type television projection device is mounted facing the screen, the projection device is provided on a head resist. CONSTITUTION:A liquid crystal television projection device 8 having a frame 7 of a laterally elongated box type head rest located to the upper part of a seat back 2' of each seat 1' of a train through an astride set 6 is mounted astride seat backs 2' and 2' positioned to the upper parts of so-called twin type romance seats 1' and 1'. Each liquid crystal television projection device 8 has windows 9 and 9 for projecting a television picture opened throughout the whole surfaces on both sides of the frame 7 and a pair of windows 10 and 10 for spot light formed in a position near a central part. Irradiation with picture projection light through the window 9 for projecting a picture is effected, and an enlarged picture is projected on a screen 5' on the back of a table 3' inclinably mounted to the back of the seat back 2' of the front seat 1'.

Description

[Detailed description of the invention] <Industrial application field> The disclosed technology is applicable to personal direct-view type or belongs to the technical field of a television projection device system that is equipped with a transmissive liquid crystal television or the like and also allows the use of a spotlight for reading, writing, etc.

<Summary of the gist> The invention of this application is based on the invention of a train such as a Shinkansen or an airline, in which a screen for projecting television images doubles as a table on the back of the seat back of a plurality of seats arranged in a row in a cabin of a ship, etc. This invention relates to a vehicle television device, in which a liquid crystal television projection device is provided in a predetermined position opposite to the screen, and in particular, the liquid crystal television projection device is installed in a headrest or a front seat. Lower side or ceiling ζ
This invention relates to a vehicle television device in which armrests are attached to seats, etc., and light from separately provided spotlights is projected toward each seat.

<Prior art> As is well known, not only civil life but also industrial society has entered a highly information-oriented society. In particular, with the rapid development of electronic optics, information transmission through image processing is becoming more and more important, and it is no longer used simply for entertainment or education. It has come to be widely used not only for information processing, but also for scientific and technological data, office data processing, etc. in schools, research institutes, medical institutions, economies, manufacturing companies, institutions, etc.

Therefore, the conventional O-
In information processing equipment such as A equipment, the equipment itself is large and has a fixed format, and has no choice but to use one-on-one or one-on-one face-to-face format with a small number of people, and the mass media format for an unspecified number of viewers is Due to the rapid development of liquid crystal panel technology in recent years, research has been carried out on technology to directly or indirectly enlarge and project images onto a screen using the light-transmitting characteristics of the liquid crystal panel. At the same time, due to the small size of LCD panels, so-called micro TVs and projection devices have been developed, ranging from portable portable types to personal types that can be installed in cars, trains, etc. Things are also starting to be developed.

<Problems to be Solved by the Invention> However, in conventional personal type image projection devices using a compact size liquid crystal panel, there are many direct view types, and the optical path from the light source in the casing is short. For this reason, the size of the liquid crystal panel is small and the definition and resolution are not improved, and it is difficult to see due to flickering etc. As a result, a large projected image cannot be obtained. Due to the characteristics of the liquid crystal panel, there has been a problem that the image becomes unclear when viewed from an oblique direction other than when viewed directly from the front in a direction perpendicular to the screen.

To deal with this, if the LCD panel is made larger in order to obtain a larger image, the casing and housing must also become larger, which may impede portability or require a larger installation space. However, there are disadvantages that reduce the advantages of the above-mentioned liquid crystal panel image projection device.

In addition, in the recent complex three-dimensional social structure, time efficiency related to information processing has become extremely important. There is a strong tendency to use time effectively, not only for entertainment and education, but also for data processing of image information using video tape recorders, etc., even when traveling on business trips using vehicles such as trains, aircraft, ships, etc. Conventional so-called video projectors, television projectors, etc. are large and heavy, and have the disadvantage of not having sufficient brightness or contrast, so they cannot be mounted on vehicles such as trains. There was a problem.

Therefore, as shown in Fig. 20.21.22, by using the back side of the seat back 2 of the seat cushion 1 of a vehicle such as a train, a direct-view personal television 3 with a liquid crystal television device having a screen is installed. Technology for installing LCD TVs has also been developed and is now being used in some vehicles such as cars, but the downside is that the screen is small and difficult to view when viewing images directly on LCD TVs. there were.

In addition, in the case of a transmissive LCD TV that can also be used as a table, there is a problem in that it is difficult to see due to the disturbance light from the window 6, so it is recommended to close the curtains twice to increase the brightness of the screen. There is also a way to do this, but in this case, the 20th
As shown in the figure, there was an inconvenience in that it interfered with other passengers' handling of table ornaments, reading, etc.

Furthermore, if the seat cushion of the front seat of a small LCD TV is embedded in the seat back, the manufacturing cost of the vehicle will increase due to the individual installation, resulting in a greater burden on passengers. There is a disadvantage that the table type has a thick table, and
The downside is that when used for long periods of time, the temperature rises due to the heat generated by the electronic circuitry for driving the liquid crystal.

In recent years, in order to improve the comfort of vehicles, seat cushions are designed to be rotatable so that they can be changed in the same direction from front to back. There was the inconvenience of not being able to

<Object of the Invention> The object of the invention of this application is to take full advantage of the advantages of light transmittance and compact size of LCD televisions, which replace CRT televisions based on the prior art described above, and to make it possible to receive information even while traveling in a vehicle such as a train. Moreover, it does not take up much space in terms of facilities, and when in use, it does not infringe on the privacy of other passengers while reading, etc., and also prevents the use of external light from windows, electric lights, spotlights, etc. To provide an excellent vehicle television device that is useful in the field of image protection processing technology application in the information industry by allowing the projected image of a liquid crystal television to be clearly viewed on a large screen that is always bright, clear, and has good contrast. This is what I am trying to do.

In order to solve the above-mentioned problems, the structure of the invention of this application, which is based on the above-mentioned claims, is to solve the above-mentioned problems. A projection screen can be set up by using a table on the back of the seat cushion in the front seat, the frame under the seat cushion, or the armrest in the rear seat. ,
A TV projection device is installed on the headrest or ceiling above the seat back of the relevant seat cushion on the rear side, on the luggage rack or armrest, or on the bottom of the front seat, and a light source such as a halogen lamp is installed inside the frame. , an enlarged image is projected from the image projection window onto the screen of each sheet via total reflection mirrors provided on both sides, and one panel is placed on the light source side of the image forming liquid crystal panel installed within the frame. In addition, another polarizing filter is placed on the surface of the screen, so that the projected image is bright only to the viewer, despite the presence of external light such as windows and electric lights. It is clearly visible with good contrast, and does not interfere with other passengers' viewing of the scenery outside the window, handling drinks, or reading. Furthermore, when reading at night, etc., it is necessary to avoid spotlights. This is a technical measure that allows reading and other activities to be done by projecting light.

<Example> Next, an example of the invention of this application will be described below based on FIGS. 1 to 19. 20 to 22 will be described using the same reference numerals.

The embodiment shown in Figures 1 to 3 is an embodiment of a new 9♀ line type train as a vehicle with an embedded TV, and each seat 1'1'... is arranged in tandem in a twin type. At the top of the back seat 2'2'..., a liquid crystal television projection device 8 having a frame 7 of a horizontally long box-type headrest is installed via a straddle seat 6 on the seat above both twin type so-called romance seats 1'1'. It is mounted across the back 2'2'.

In each liquid crystal television projection device 8, windows 9.9 for television image projection are opened at both front sides of the frame 7, as shown in FIG. 2.3, and windows 9.9 are opened near the center. A pair of spotlight windows 10.10 are opened adjacent to each other.

Therefore, in each liquid crystal television projection device 8, the second
．． As shown in Figure 3, a light source 11 such as a normal type halogen lamp is installed in the center, condenser lenses 12 and 12 are installed on both sides of the light source 11, and condenser lenses 13 are installed in the optical path on both sides. A liquid crystal panel 14, 14 for image formation is provided through each of the polarizing filters 15 and 14, respectively.
is provided only on the light source 11 side, a projection lens 16 is provided on the side of the window 9 for image projection, a total reflection mirror 17 and a total reflection mirror 17' for adjusting the reflection angle are provided. Image projection light is transmitted through a projection window 9 to project an enlarged image onto a screen 5' formed on the back surface of a table 3' which is provided on the back surface of the seat back 2' of the front seat 1 and can be tilted freely. ing.

Although not shown, the screen 5 of the table 3'
A polarizing filter is attached to the surface of the screen 5', and together with the polarizing filter 15 of the liquid crystal panel 14, the enlarged image projected on the screen 5' can be viewed from the car window 6 only for @passengers seated on the seat cushion. The image can be viewed as a clear image regardless of the ambient light from the ceiling light or the overhead light.

In other words, the light from the train windows 6 and the electric lights on the ceiling is not polarized and is therefore not visible to the naked eye, so the interior of the train is bright overall and does not interfere with reading for those who are not looking at images. Moreover, the images can be viewed without closing the curtains 21, etc., so there is no problem with the reading etc. of the passenger sitting next to the passenger.

Also, each pair of spotlight windows 10 and 10 near the center.
The total reflection mirror 20 for changing the optical path is connected to the lever 21.
In the open state, the light from the light source 11 is not transmitted to the liquid crystal panel 14, but is totally reflected, and the window 1 is opened and closed.
By projecting light from zero to the seat side, it is possible to read books 22 and newspapers 22' and handle drinks 23 on table 3' without any problem.

Of course, although not shown, there is a spotlight window 10,
It is also possible to attach a total reflection mirror to the IQ that can freely adjust the angle of the spotlight.

Note that 18 is a cooling fan device.

These operations are performed on each sheet 1 as shown in Figure 1.
It can be controlled as appropriate using a dial 25 and a switch 26 on the armrest 24, and further, audio can be heard using an earphone jack.

Since the liquid crystal television projection device 8 is shared by the seatbacks 2' and 2' of the twin-type seat 1, it can be made compact, and the screen 5' can be mounted on the table 3'. Since the back side of the monitor can be used, its thickness can be made thinner, and the angle can be freely adjusted by the support 4', allowing pA recognition of the color image projected at the optimum viewing angle.

The reference numeral 19 shown in FIG. 3 is a well-known electronic drive device installed within the frame 7, which also has the ability to set broadcast television programs and micro-video tapes that may be held as appropriate. .

In the above configuration, there are four passengers on each seat 1, and when they want to watch broadcast TV programs, video tapes, etc. to kill time while riding to a predetermined destination, they use the dial 25 of the armrest 24 or the switch. 26 as appropriate, insert a terminal such as an earphone into the jack, adjust the total reflection mirror 17' for adjusting the reflection angle formed at the end of the frame, and raise the table 3'. , the image information of a predetermined television program can be enlarged and projected onto the screen 5' at an optimum viewing angle by the support 4' and viewed in a predetermined manner.

Of course, in this case, by setting a micro videotape or the like formed in a standard small size in the electronic drive device 19, it is possible to enlarge and project video images of entertainment and educational programs or work-related content as desired for viewing. In this case, the image information enlarged and projected onto the screen 5' is displayed on the liquid crystal panel 1.
4 is visible only by the passenger 9 who visually recognizes the image information through the polarizing filter 15 attached to one side of the liquid crystal panel 14 and the polarizing filter attached to the surface of the screen 5'. In addition, since external disturbance light from the train window 6 and ceiling lights do not have polarization, the inside of the train is bright as a whole, making it difficult for readers to view the scenery outside the train window or read. There will be no hindrance to those who wish to do so.

Therefore, it is possible to visually recognize a bright image, clear color image, etc. with good contrast, which is not affected by ambient light.

Of course, there will be no problem in watching TV when the person sitting next to the person closes the curtain 21 and goes to sleep.

Of course, those who do not view the TV image can fold the table 3' into a specified position without operating the dials, place luggage, drinks, etc., and place the book 22 or newspaper 22' on the window 2.
It is possible to read by the light from 7, and writing can be done as desired on the table 3'.

When reading in bright conditions at night, etc., the light path to the liquid crystal panel 14 is blocked by operating the switch on the armrest 24 or by operating the lever 21 to turn on the total reflection mirror 20 for changing the optical path. It is possible to read, write, etc. by projecting only the light of a spotlight onto the sheet from the window 10, and in that case, even if the table 3' is raised, an enlarged image will not be projected on the screen 5'. do not have.

Of course, if it is desired to enlarge and project the image and view it on the screen 5', this can be done without any problem as in the daytime.

The above embodiment is an embodiment of the LCD TV projection device 8 that is commonly set on a twin type so-called romance seat type seat, but the 4.5th embodiment is a personal type in a special passenger compartment etc. As shown in the figure, a frame 7 with a box-shaped cross section of a liquid crystal television projector 8' is set on the head of the seat back 21 of the separate seat 11 of each personal type via a straddle seat 6', and is held at a predetermined angle by a support 4'. Screen 5' on the back of table 3' caused by
Enlarged images are projected onto the screen so that they can be viewed visually.
In addition, when reading a book 22 etc. that does not require viewing on a TV, it is possible to read or write as desired on each sheet using Spora 1 to Light. LCD TV projection device 8
' may be a mechanism for one side of the liquid crystal television projection device shown in Fig. 2.3.

Furthermore, the temperature increase caused by the electronic drive device 19 in the frame 7 of the liquid crystal television projection device 8.8' during operation can be sufficiently countered by the cooling fan 18, and the inside of the table 3' is Due to the absence of an electronic drive, no temperature increase occurs due to the screen 5'.

In the embodiment shown in FIG. 6, a Fresnel lens 13' of a lever-operated type or the like is appropriately provided between the monochrome liquid crystal panel 14 having one polarizing panel 14' and the projection lens 16 of the reflecting mirror 17. By inserting the Fresnel lens 13' in front of the projection lens 16 so as to block the optical path, the light that picks up image information from the monochrome liquid crystal panel 14 is reflected by the reflection mirror 17. A spotlight type with sufficient brightness that can change the focal length and expand and contract the light from the light source 6 so as not to form a projected image on the screen 5' attached to the surface of the polarizing panel 14'. In addition, when the Fresnel lens 13' is opened so as not to block the optical path, since the polarizing panel 14' is attached to the surface of the screen 5', one sheet can be placed on the screen 5'. polarizing panel 14
The image formed on the monochrome liquid crystal panel 14 marked with ' is enlarged and projected.

The purpose of using a monochrome liquid crystal panel is to ensure that the light from the light source 6 has sufficient brightness when used as a spotlight so that reading, writing, etc. can be performed without any hindrance. be.

Furthermore, since the light transmitted from the light source 6 to the monochrome liquid crystal panel 14 is white, it is possible to read or write with sufficient brightness when used as a spotlight.

Each of the above-mentioned embodiments is an embodiment in which a projection device is incorporated in the headrest on the upper part of the seat back of the seat cushion.Next, in the embodiments shown in FIGS. Seat cushion seat back 2'
This is a type in which a projection device 8 is embedded in the rear surface of the backrest, and a Fresnel lens 13' is provided on the inner surface of a see-through screen 5' which also serves as a table. In the embodiment shown in the figure, a frame 20' having a reflective mirror 20 on its inner surface is connected to a slide pin 29 at the base end of the frame 20' to form a groove 20 in a seat back 2'.
A foldable handle 31 is provided at the tip of the frame 20', and a fixed hinge 30 for the seat cushion 2' is provided at the upper end of the screen 5'.
Usually, the screen 5' and the electronic drive device 19 are housed in the seat back 2' of the backrest as shown in FIG. 7, and the handle 31 is pulled out when viewing the TV screen. slide the frame 20' along the kite groove 28 of the seat cushion 2' with the slide pin 29.
In this embodiment, the screen 5' can be raised to extend the screen 5' and make it usable as shown in FIG.

Next, in the embodiment shown in FIG. 9.10, a fixed hinge 30 is provided at the base end of the screen 5', and a bellows 32 is provided at the lower end of the hinge 30 between the seat back 2 and the screen 5'. In addition to preventing outside light from entering the inner surface, a four-point hinge link 33 is provided on the inner surface of the screen 5' to allow the electronic drive device 19 to be opened and closed relatively freely, and when not in use, the four storage parts 34 of the seat back 2 Screen 5 inside
′ and pull it out only when in use to make it visible.
In addition, the bellows 32 is designed to prevent disturbance light from entering, and when in use, the projected image can be enlarged and viewed using the Fresnel lens 13'. In this embodiment, both the electronic drive device 15 and the screen 5' can be folded freely.

Next, in the embodiment shown in FIGS. 11 and 12, an electronic device 19 such as an electronic drive device is stored under the seat cushion of the front seat, and a see-through screen 5 is installed under the front seat back. As in the above-mentioned embodiments, a Fresnel lens 13' is attached to the inner surface of the lens so that the TV image can be viewed, and in this embodiment, the space under the front seat is utilized effectively. When reading at night, etc., the headlight illumination from one side of the heradrest 8 of each of the above-mentioned embodiments can sufficiently respond to the need. .

It is also possible to link the screen 5' to the footrest 36 during seed crushing.

In each of the above-mentioned embodiments, the image projection device is fixed in advance to a predetermined position on the seat of a train or the like, or is built in so that it can be pulled out freely, but the embodiments shown in FIGS. Since it is fully expected that portable portable type LCD televisions will be widely used, portable portable type image projection devices for personal use are also being used as attachments in vehicles such as Shinkansen trains.
As shown in Figure 3, 8' is a portable liquid crystal panel type image projection device, and a frame-shaped lid 3 is attached to the rear half of a box-shaped casing 7 that is rectangular in plan view via a hinge.
7, which has a transparent screen 5', a Fresnel lens 13 on its inner surface, and a polarizing panel 5 on its outer surface.
A thin resin film hood 32' (a bellows type is also acceptable) for blocking external light is foldably attached from the tip to the casing 7.

A predetermined light source 11 is provided with a total reflection mirror near the inner lower side of the casing 7, and is electrically connected to an electrical component 19 provided near the other side of the casing 7. A condenser lens 12 is provided at the front part of the casing 7, and a total reflection mirror 20 with a polarizing panel 5' attached to its upper surface is attached parallel to the inner surface of the casing 7. A Fresnel lens 13 is attached to the rear surface of the LCD panel 20, and a liquid crystal panel 14, which is connected to an electronic driving device (not shown) of the electrical equipment section 19 and forms a predetermined color image of a broadcast television or a videotape, is attached at a predetermined angle. It is installed diagonally.

A total reflection mirror 20 is attached to the casing 7 in parallel to the total reflection mirror 20 at the rear of the liquid crystal panel 14 so as to form a long optical path together with the total reflection mirror 20. In contrast, a projection lens 16 is interposed.

In addition, 38 is a power cord from the electrical equipment section 19, 39 is a stand plate, and 31 is a handle for portability.

Of course, the electrical equipment section 19 is provided with a videotape operating device, and if the image projection device 1 is of a portable type, a battery or the like is appropriately housed therein.

In the above-mentioned structure, when carrying or storing the body 3, the body 3 is folded into the casing 7 together with the hood 32', and is made into a compact storage type.
It is possible to install it upright through the lid 5, and when recognizing the pA of color images on a TV as appropriate, the lid 5 can be installed vertically.
' is opened at a predetermined angle as shown in FIG.
Turn on the power, turn on the light source 11, and at the same time turn on the liquid crystal panel 1.
4, a predetermined color image of broadcast television or videotape is formed.

The light from the light source 11 is condensed by the condenser lens 12, totally reflected by the total reflection mirror 20, converted into parallel rays by the Fresnel lens 13, and a color image formed on the liquid crystal panel 14 is clearly picked up. Further, it is totally reflected by the total reflection mirror 20 and reflected by the projection lens 16 from the Fresnel lens 13h1 of the screen 5'.
A clear, high-resolution, high-contrast projected color image can be viewed through the hood 32' blocking disturbance light.

In this case, since the polarizing panels 14 and 51 are in contact with the total reflection mirror 20 and the screen 5', the liquid crystal panel 1
4 can be clearly projected, and a Fresnel lens 13 is attached to the liquid crystal panel 14, and a Fresnel lens 13 is attached to the inner surface of the screen 51. Therefore, the incident light on the image becomes parallel light, and a clear, high-resolution enlarged image can be projected without distorting the image.

As shown in FIG. 13, the liquid crystal panel 14 is installed obliquely, a pair of total reflection mirrors 20 and 20 are installed in parallel inside the casing 7, and a screen 51 is installed inside the casing 7.
The light path from the light source 11 is arranged in the casing 7, which is as compact as possible, in order to make it a kind of flip-up type due to the open state of the casing 7.
Despite this, it is possible to project an enlarged image formed over a long process, and when viewing the image, a see-through screen is used instead of directly viewing the image formed on the liquid crystal panel 14. It is not difficult to see the image enlarged and projected onto 5'.

Accordingly, the embodiment shown in FIGS. 15 to 17 is such that the backrest of the back seat 2 of the seat in each train such as the Shinkansen,
This is a mode in which the image projection device 8' shown in FIGS. 13 and 14 is appropriately installed and the stand plate 39 can be raised and lowered. For example, in the mode shown in FIG. If you do not want to view the image without forming an image, you can raise the stand plate 39 and lean a magazine, newspaper, etc. 22 up against it for reading.Also, as shown in FIG. When viewing an image such as a color image or a video, the lid 7 is opened, the see-through screen 5' is raised to an angle that makes it easy to see, and the electric component 19 is turned on to display an enlarged and projected color image or the like. You can enjoy high-definition, high-contrast images.

In this case, the total reflection mirror 20 and the polarizing panel 14.5' attached to the screen 5' also
It is possible to view a clear, high-contrast, distortion-free enlarged image without being affected by external light from the window 27, and by using the jack provided on the hook for earphones, etc., there is no interference from the surroundings. It does not cause any nuisance, and does not interfere with reading or the like due to ambient light from the surrounding windows 6.

Also, as shown in FIG. 17, the stand plate 39
The casing 7 can be raised nearly horizontally against the backrest of the back seat 2 of the front seat by cooperating with the casing 7, so that it can be used as a kind of table for eating, drinking, writing, etc.

It goes without saying that the embodiments of the invention of this application are not limited to the above-mentioned aspects, and it is of course possible to store the electronic drive device etc. inside the armrest. In addition, in cases where each seat is a reclining seat type, the screen and reclining are linked to automatically adjust the relative distance of the seat and screen to the projection device, or these can be mechanically adjusted using cables. Various modes can be adopted, such as hardware control by switching contact points, or wireless means such as infrared rays, ultrasonic waves, and wireless means.

Furthermore, a projection device can be installed on the ceiling side of the vehicle to illuminate passengers with image projection light or spotlights, or the projection device and spotlights can be illuminated from the luggage rack area. Various aspects such as the above can be adopted.

As shown in FIG. 17, in the case of the type in which the image projection device is housed in the headrest, a predetermined appropriate photoelectric detection device 40, 40' such as a phototransistor or a photocoupler is provided at both ears. If the passenger's head is in the headrest 8
The speaker device 41 with good sound quality is automatically activated only when the speaker is close to the ear, and as shown in the embodiment of FIG.
41', you can hear excellent stereophonic sound, and
It is also possible to prevent sound from leaking to the surroundings.

Furthermore, in the low-cost 1-type, the polarizing filter may be omitted, and various embodiments such as stereoscopic television projection according to the applicant's earlier invention and viewing with polarized glasses can also be adopted.

In addition, although the above-mentioned embodiment is mounted horizontally on the head of the seat back of the seat, it is possible to change the design and set it vertically on the armrest or hang it from the ceiling. Of course.

Furthermore, if the seat is a reclining seat type, it goes without saying that the reclining and the angle of the table, that is, the screen, can be changed to a responsive type by using an appropriate link machine.

It goes without saying that the present invention can be applied not only to trains such as Shinkansen trains, but also to aircraft, ships, and vehicles such as buses.

<Effects of the Invention> As described above, according to the invention of this application, the back side of the table provided on the front seat back of the seats arranged in rows on a train, airplane, or boat shade is used as a screen, and the seat back of the rear seat is used as a screen. An enlarged image can be projected using a single light source inside the LCD TV projection device mounted on the head of a person, and an optical path conversion device prevents the light from the light source from passing through the LCD panel, eliminating total internal reflection. Because the mirror can project light onto the sheet as a spotlight,
It has the effect of being able to be used not only for viewing TV images, but also for illumination for reading and writing.Therefore, one polarizing filter is attached to the liquid crystal panel in the frame, and one polarizing filter is attached to the surface of the screen. By installing two polarizing filters, you can project and enjoy a bright, clear, and high-contrast TV image without being disturbed by ambient light from outside the window or ceiling lights. is conquered by Qin.

Further, as far as this is concerned, sufficient brightness can be maintained within the vehicle, so that the reading or writing of passengers who do not need to visually recognize images will not be hindered in any way.

Furthermore, by performing the optical path conversion switching when reading or writing, the light from the light source is not transmitted through the liquid crystal, and there is an effect that the person reading or writing is not hindered.

By doing this, an excellent effect on information processing can be achieved, in that data processing can be performed while moving in a vehicle, even when in a moving state other than at home, a factory, a research institute, a school, etc.

[Brief explanation of the drawing]

The drawings are a detailed explanatory view of the invention of this application and a diagram of a conventional aspect, and Fig. 1 is an overall schematic perspective view of one embodiment of a twin type sheet, and Figs. 2 and 3 are illustrations of a liquid crystal television projection device. 4.5 is a schematic side view and plan view of a single type of another embodiment; FIG. 6 is a schematic sectional view of yet another embodiment; FIG. 7.8 9.10 is a partial cross-sectional side view of yet another embodiment and a side cross-sectional view in use.
The figures further show a partial sectional view of Haku's embodiment and a front view when in use, FIG. 11 is a partially enlarged perspective view of the cabin of another embodiment, FIG. 12 is a partial sectional view of the same, and FIG. 14 is a plane sectional view of the same, FIGS. 15, 16, and 17 are side views of further embodiments, FIGS. 18 and 19 are schematic plan views of personal type image projection, and FIGS. 20 and 21 are Figure 22 is a schematic side view of a vehicle-mounted liquid crystal television projector set based on the prior art. 1.1'... Seat, 2.2'... Seat back, 5'... Screen, 8.8'... Liquid crystal television projection device, 7.7'...
Frame, 11... Light source, 14... Liquid crystal (panel), 20... Optical path conversion device, 10... Spotlight window, 15... Polarizing filter, 3'... Table

Claims (1)

[Scope of Claims] (1) A vehicle television device in which a projection screen is provided on the back side of the seat back of a front seat of a vehicle, and a liquid crystal television projection device is provided opposite to the screen, wherein the projection device is A television device for a vehicle, characterized in that it is provided in a headrest. (2) The television device for a vehicle according to claim 1, wherein the projection device is attached to the lower side of the front seat. (3) The vehicle television device according to claim 1, wherein the projection device is attached to an armrest. (4) The vehicle television device according to claim 1, wherein the projection device is attached to the ceiling of a passenger cabin. (5) The television device for a vehicle according to claim 1, wherein the projection device is attached to a side wall of a passenger compartment. (6) The vehicle television device according to claim 1, wherein the projection device is attached to a luggage rack. (7) The vehicle television device according to claim 1, wherein the projection device is provided with a spotlight. (8) The vehicle television device according to claim 1, wherein a speaker is attached to the headrest. (9) The television device for a vehicle according to claim 8, wherein the speaker is provided with a sound insulating bellows for listening. (10) In a vehicle television device in which a projection screen is provided on the back side of the seat back of the front seat of the vehicle and a liquid crystal television projection device is provided opposite to the screen, a light source is provided within the frame of the liquid crystal television projection device. A television device for a vehicle, characterized in that an optical path changing device is attached to a spotlight window between the camera and the liquid crystal display. (11) The vehicle television device according to claim 10, wherein a polarizing filter is attached to one side of the liquid crystal panel and the front surface of the screen of the liquid crystal television projection device. (12) The vehicle television device according to claim 10, wherein the screen uses the back surface of the table of the seat back. (13) The vehicle television device according to claim 10, wherein one light source is provided in the liquid crystal television projection device and a plurality of television projection windows are attached. (14) In the image projection device described above, a liquid crystal panel provided in a casing is connected to an electronic drive device, a light source and a projection lens are installed in front and behind the liquid crystal panel, and a lid of the casing is formed as a screen. A vehicle for a vehicle, characterized in that a liquid crystal panel is installed obliquely within a casing, a total reflection mirror is installed between the liquid crystal panel and a light source, the lid body is openable and closable, and a see-through screen is attached. TV equipment.