JPH0666932B2 - Image projection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The disclosed technology is a personal type that allows an inpatient such as a hospital to simply project on a bed while sitting on a bed. It belongs to the technical field that enables the viewing of images.

<Summary of Summary> Therefore, the invention of this application provides a swivel arm having a position and posture adjustable on the upper portion of a pole set by a patient or the like who is sleeping on a bed such as a bed of a hospital, which is inserted into the bedside of the bed. The present invention relates to an image projection apparatus in which a screen is provided at the end of the arm via the arm and a projector is provided near the pole, and in particular, a light source such as a lamp, a transmission type original image apparatus, and a magnifying lens are provided. In this order, a projector provided in the casing is provided with a fixed focal length between the projector and the screen at the tip of the arm.
The present invention relates to a device such as a liquid crystal panel having only one polarizing panel, and an image projecting device also serving as a readable and readable table, in which the screen is a screen having a polarizing function.

<Prior Art> As is well known, televisions have come to function from the original functions for consumer use to the functions for industrial and research purposes in recent years. Direct-view type TVs, such as brown-type TVs, which have a strong function and have reached the stage of completion, have been tributaries.
Since it is heavy and lacks in flexibility to be used for portable flights, it is inconvenient to freely watch while being bedridden on the bed etc. of inpatients such as hospitals. was there.

To deal with this, pocket type TVs using not only monochrome type but also color type liquid crystal panel have recently been put into practical use, have become extremely handy and easy to use, and have become rapidly popular. ing.

<Problems to be Solved by the Invention> Meanwhile, while the newly developed liquid crystal television is small and convenient, its screen is small due to its compact size and small size, and thus it is difficult to see. There is a drawback, and especially for inpatients such as bedridden patients in hospitals, there is an inconvenience that the elderly and patients with weak eyesight feel tired during their stay.

In order to deal with this, a technique of projecting an image by using the light transmissive property of a liquid crystal panel to project a screen from the bedside to the ceiling is being developed and researched by the applicant's prior invention, etc. Aside from the private rooms, there is the inconvenience that it cannot be used purely for personal use without disturbing the surrounding people, and the image is magnified when projected onto the ceiling, but it is inevitable. There is a problem that it becomes dark and the texture is rough in color images, etc. Also, if a bright lamp etc. is used to obtain a bright image, it will adversely affect the transmission characteristics of the liquid crystal panel etc. was there.

<Purpose of Invention> The purpose of the invention of this application is to solve the problems of the television for personal use of inpatients such as bedridden for personal use based on the above-mentioned prior art. You can enjoy watching the image in a comfortable position, and you can use it as you like for personal use without disturbing the surroundings. In addition, it consumes less power and projects a detailed image as a magnified image that can withstand viewing. , Provides an excellent image projection device that can be used like a bright direct-view television and can read in a sufficient brightness as a lectern to benefit the image application field in the information industry. It is what

<Means / Action for Solving Problems> In order to solve the above-mentioned problems, the structure of the invention of the present application, which is based on the above-mentioned object, is intended to solve the above-mentioned problems. When watching TV, etc. while sleeping on the bedding, insert the pole of the image projection device of the bookstand type into the bedside of the bedding and make it stand upright, and turn the swivel arm provided above it to the desired height. It is installed in the projector casing by turning it up and down to set the screen at the tip of the swivel arm to the most visible position and turning on the light source such as the projector lamp installed on the pole side. The original color image is driven by the transmitted color liquid crystal panel etc. through the lens set in the casing,
A magnified color image can be projected on a screen that has a fixed focal length and direction at the tip of the swivel arm and can be viewed, and only the light source can be stopped by stopping the original image drive device. By turning on the light, a mere illumination is lost on the screen, so that the screen can also be used as a reading stand so that a book can be set and read. Furthermore, the light source of the color liquid crystal panel of the original image device. Only one polarizing panel is set on the side, and a polarizing panel is attached as a stereo screen for maintaining the polarized light on the screen, and the polarized image transmitted through the liquid crystal panel is clearly enlarged and projected on the screen, as in the direct view type. It is possible to view a color image that has been enlarged appropriately, and the polarizing panel of the screen that sets a book on the screen as a book stand is cut off. An image was not projected on the screen while the panel was driven, and only the lighting function was demonstrated, and the technical measures were taken so that the set book could be read in a bright state as a book stand. Is.

<Example-Structure> Next, an example of the invention of this application will be described with reference to the drawings.

In addition, the same portions will be described using the same reference numerals throughout.

In the embodiment shown in FIGS. 1 and 2, reference numeral 1 is a color image projection apparatus which forms the center of the gist of the invention of this application, and in the embodiment, a patient sleeping on a bed 2 of a bedding in a hospital room. A hole 5 is provided upright at the base of a base panel 4 that is inserted between the bed frame (not shown) and the bedside of the bed 2, which is used for watching TV of No. 3,
Therefore, the bedside of the bed 2 can be set and reset freely.

A sleeve 6 is fixed to the upper portion of the pole 5 by a patient 3 by an adjusting screw 7 in a predetermined and safety manner so that the sleeve 6 can be adjusted in position to a desired height. Further, the sleeve 6 is provided inside the upper end of the sleeve 6. A bracket 9 is rotatably and fixedly attached to the pin 8, and a slider 10 which can be moved back and forth and fixedly to the bracket 9 is provided with an arm 11 extending forward by a predetermined length and a lower side thereof. The projector and the dial 13 and the volume 12 are designed to be easily operated by the patient, and the projector 13 is detachably installed.The arm 11 and the projector 13 together with the slider 10 can be set up and down in a swivel position. Further, a well-known so-called stereo screen whose focal length is fixed in advance to the projector 13 at the tip of the arm 11
14 is provided and a polarizing panel 15 is attached to the surface on the patient side, and a book mounting set jig 16 (not shown) is provided at the lower end similarly to a general book stand as a book stand.

Then, in the projector 13, as shown in FIG. 2, a rectangular column-shaped casing 17 having a length in the vertical direction is attached to the lower surface of the slider 10 to be removable, and the upper portion 2 is for cooling. Ventilation hole 18 is provided, a safety pad 19 for the patient 3 is additionally provided at the lower end, a projection hole 20 is opened on the lower side toward the stereo screen 14, and a ventilation hole is provided on the upper side. 21 is drilled.

A white lamp 22 as a light source is replaceably provided on the upper rear wall of the casing 17, and total reflection mirrors 23, 23 'are provided on the inner surfaces of the front wall and the rear wall.
A total reflection mirror 23 'is obliquely provided on the lower side in a predetermined manner.

In between these, a well-known heat ray filter 24 and a polarization panel 25 are obliquely installed from the upper side to the lower side of the lamp, and
A commercially available Fresnel lens 26 with a tilted reflection angle and a well-known color liquid crystal panel 27 as a transmission type original image device are provided, and an electronic device 28 is set in a space between a lower total reflection mirror 27 'and a pad 19. And a lens 29 having a fixed focal length with the stereo screen 14 is set in the projection hole 22 through a lead wire (not shown).

The total reflection mirrors 23, 23 ', 23 "and the color liquid crystal panel 2
7, the lens 29 is set at a predetermined relative position such that the original image of the color liquid crystal panel 27 is projected on the stereo screen 14 by forming a predetermined enlarged color image as shown in FIG. There is.

The image itself projected from the lens 29 is the casing.
No image is formed because it is the only one polarizing panel 25 provided below the heat ray filter 24 of 17, but when it is projected on the stereo screen 14, the stereo screen 14
A predetermined magnified color image is formed by the polarizing panel 15 attached to the front surface of the 14 and therefore the stereo screen
When a book (not shown) is set through the lower setting jig 16 of 14, the light from the lens 29 is blocked without reaching the polarizing panel 15 of the stereo screen 14, so that the book is simply illuminated as illumination light. It will be automatically converted to have the function.

The Fresnel lens 26 is a diaphragm lens, and the lens 29 is an image forming lens.

<Example-Operation> In the above-described configuration, when the patient 3 sleeping on the bed 2 in the hospital room wants to watch a desired TV image, the handle 7 is operated in a sleeping position to move the sleeve 6 up and down in a predetermined manner, and The slider 10 is pivoted to the pin 8 and moved back and forth, and pivoted horizontally with respect to the pole 52 to set the stereo screen 14 in a desired position and posture.

In the embodiment shown in FIG. 1, the stereo screen 14 is shown slightly separated from the patient 3 for convenience of illustration.

By operating the dial 12 or the like of the projector 13 with one hand easily, the lamp 22 is turned on, the electronic device 28 performs desired channel switching, and the original TV image is formed on the color liquid crystal panel 27. The light from the lamp 22 passes through the heat ray filter 24 and the polarization panel 25, is reflected by the reflection mirror 23, is squeezed by the Fresnel lens 26, passes through the original image of the liquid crystal panel 27, and is reflected by the total reflection mirrors 23 ′ and 23 ″. Then, the focal length is set by the lens 29, and the magnified fine color image is projected on the stereo screen 14.

At this time, no book is set on the stereo screen 14 because the patient 3 intends to watch the television image, and therefore the light from the lamp 22 is not supplied to the casing 17.
Polarizing panel 25 and stereo screen 14 polarizing panel
By cooperating with 15, a bright and clear detailed color image is formed so that the patient 3 can fully appreciate it.

Since the stereo screen 14 is provided with the polarizing panel 15, the external light from the window and the light from the indoor lighting fixtures are reduced and do not become the ambient light. Therefore, for the patient 3, The color image on the stereo screen 14 can be clearly and delicately and sufficiently satisfied in spite of the presence of light from the room or light from the room, so that the patient 3 tightens the window curtain. Without doing any troublesome work such as turning off the interior light,
It is extremely convenient for resting medical conditions.

In this way, the patient 3 can view a large image that is clear and has the same size as a direct-viewing type television such as a CRT television.

When the patient 3 wants to stop reading television and read a book, the projector 13 is temporarily turned off, or the desired book is set while the projector 13 is lit, that is, the enlarged color image is projected on the stereo screen 14. When set on the stereo screen 14 via the jig 16, the book blocks the image projection light from the lens 29, so the light from the lens 29 is the casing.
Since the light from the lamp 22 that transmits only one polarization panel 25 in 17 does not have the image forming ability, the light reaching the book does not have the image forming ability even if the original image is formed on the liquid crystal panel 27. It is just light and only illuminates the book, so the patient 3 can read without having to change any switches, and in this case, the illuminance of the TV image projection is exactly the illuminance suitable for reading the book. For that reason, it is extremely convenient, and if you want to watch TV again, remove the book from the set jig 16 and the clear bright enlarged image as described above will be automatically projected on the stereo screen 14 for viewing. Can be offered.

As described above, the image projection device 1 can be a color image image projection device and can also serve as a bookstand.

When medical treatment is performed on the patient 3, the arm 11 is swung horizontally in a predetermined manner so that the medical examination or the like is not hindered. In some cases, the pole 5 and the base panel 4 may be removed together.

Of course, resetting can be done easily.

Of course, as described above, the posture change or the like of the image projection apparatus 1 can be smoothly performed with one arm of the patient 3 with almost no labor.

It should be noted that the temperature rise of the casing 17 due to the lighting of the lamp 22 during image projection, and further during reading, is naturally cooled by the indoor air flow due to natural convection from the ventilation holes 21 and 18, and the function of the liquid crystal panel 27 is deteriorated. It won't come.

Next, in the embodiment shown in FIGS. 3 and 4, the projector 13 of the above-described embodiment is a vertical type while it is a horizontal type. It is virtually the same as the example.

Of course, the embodiment of the invention of this application is not limited to the above-mentioned embodiments. For example, the original image driving device may be a video television, and the liquid crystal panel may be a dual polarization type like a normal liquid crystal television. It is possible to adopt various modes such as having a panel and using a normal normal screen instead of a stereo screen as a screen so that a lamp is switched when reading a television image projection.

As a matter of course, the application target is not limited to sick patients in hospitals, but can be applied to general households.

<Effects of the Invention> As described above, according to the invention of this application, a color image or the like can be displayed on a large screen similar to a direct-view CRT television, which is extremely useful for entertainment and rest of inpatients in hospitals, bedridden elderly people, and the like. There is an excellent effect that the projected image does not cause tired eyes and the user can enjoy it in a sufficiently satisfactory state, and that these operations can be easily performed with one hand in a bedridden state.

Further, since the image projection device also serves as a book stand, there is a dual use effect that the screen can be used as a book stand when reading is desired in addition to watching television.

Thus, since the projector uses the mechanism of the liquid crystal panel TV, it is extremely small, so that the size of the conventional projection does not significantly change the weight and the appearance and the appearance of the projector. In addition, the weight is not changed, and the usability is good, which is extremely useful for bedridden patients, the elderly, and the like, and also has an excellent effect that the comfort function as a welfare measure is also extremely useful.

In addition, by keeping the focal length between the projector and the screen constant in advance, there is no need for a busy set or reset, and since it is similar to the aspect of directly watching a general home-use television, bedridden patients and elderly people There is also the convenience that the use of etc. is convenient.

Further, since it is sufficient to operate the swivel arm with one hand to the pole as in a general reading table, there is versatility that it can be used by old people, infants, women and women without requiring any particular skill or skill.

Thus, by using one polarizing panel as the original image drive device and setting another polarizing panel on the front surface as a screen, it is possible to turn on the lights of windows and room lights while watching TV without turning off the lights. The projected image on the screen can be viewed clearly and with sufficient brightness without being disturbed by ambient light, so that inpatients and the elderly in nursing homes can turn off the room lights or watch windows when watching TV. Even if you do not close the curtain of
Because I can watch TV, because of anxiety of sick people and old people,
It is possible to eliminate anxiety from a psychological point of view, and it has an excellent effect that there is no bearing for any treatment.

Also, when switching to reading while watching the TV image, simply set the book on the screen and maintain the image projection without operating any devices, but the light from the lens is blocked by the book on the screen. Since it does not arrive, and therefore the television image is not formed and the book is simply illuminated as illumination light, it has the advantage of allowing the patient and the elderly to enjoy reading as desired. There is an effect that the etc. are unnecessary at all.

[Brief description of drawings]

Drawing is explanatory drawing of the Example of invention of this application. FIG. 1 is a schematic side view of one embodiment, FIG. 2 is a vertical sectional view of a projector, FIG. 3 is a schematic side view of another embodiment, and FIG. 4 is a vertical sectional view of the projector. 2 …… Bedding, 5 …… Pole 11 …… Swivel arm, 14 …… Screen, 1 …… Image projection device, 22 …… Light source, 27 …… Transmissive original image device, 29 …… Lens, 13 …… Projector , 15 …… Polarizing panel

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kiyoji Yamashita 3-1-1 Higashikawasaki-cho, Chuo-ku, Kobe-shi, Hyogo Kawasaki Heavy Industries Ltd. Kobe factory (56) References )

Claims (2)

[Claims] 1. An image projection apparatus in which a screen is provided above a pole set on the bedside of a bedclothes via a swivel arm, and a projector in which a light source, a transmission type original image device and a lens are sequentially arranged on the pole. Is fixedly installed with a fixed distance and direction from the screen. 2. An image projection apparatus in which a screen is provided above a pole set on the bedside of bedding via a swivel arm, and a light source, a polarizing panel, a transmission type original image device, and a lens are sequentially arranged on the pole. An image projection apparatus, wherein the projector is fixedly installed with a fixed distance and direction from a screen having a polarizing panel.