JP2735047B2 - projector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector for enlarging and displaying a display image of a computer having a liquid crystal display screen on a screen as a projection image, and more particularly, to a display image of the computer directly attached to a display section of the computer. The present invention relates to a projector capable of projecting an image.

[0002]

2. Description of the Related Art Heretofore, as a projector for enlarging and displaying a display image of a notebook or laptop computer having a liquid crystal display screen as a projection image on a screen, for example, a projector as shown in FIG. Used. Note that the term “computer” in this specification includes, in addition to a computer having a calculation function and the like,
It also includes a word processor whose main function is document creation.

A projector of this type shown in FIG. 1 includes a projector main body 10, a light source section 20, a transmissive liquid crystal display panel 30, and a lens section 40 provided in the projector main body 10. Light source unit 20 and liquid crystal display panel 3
0 indicates that the white light (arrow A in the figure) emitted from the light source unit 20 can be transmitted through the liquid crystal display panel 30.

Further, a cooling fan 50 is provided on an upper surface of the projector main body 10 and a circuit section 60 for receiving an image signal from a computer 80 is provided on a lower surface thereof. They are connected by a cable 70. 80a is a liquid crystal display of the computer 80.

In the conventional projector having such a configuration, a display image created by the computer 80 is input to the projector main body 10 as an image signal via the interface cable 70, and the input signal is input to the circuit section 60. The liquid crystal display panel 30 in the projector main body 10 is driven to display an image.

[0006] White light (arrow A in the figure) emitted from the light source section 20 is incident on the liquid crystal display panel 30 on which an image is displayed from the front, and the white light is used to display an image. The image light (arrow B in the figure) is transmitted by passing through 30.

[0007] Then, this image light is transmitted through the lens unit 40 to become projection light (arrow C in the figure), and forms an image on a screen 90 provided behind the projector main body 10.
It is designed to be displayed as a projected image. As a technology of this type of projector, for example, Japanese Utility Model Laid-Open No. 62-1
No. 81940 discloses a projection type liquid crystal display device.

In addition, a projector as shown in FIG. 5 is also used as a projector for directly projecting a display screen of a liquid crystal display type computer. In the projector shown in FIG. 5, the liquid crystal display section of the computer 80 is removed and the overhead projector 10
Mounted on a Fresnel lens for image projection.

That is, in this projector, a liquid crystal display section 80a composed of a transmissive liquid crystal panel attached to a computer 80 is detached and mounted on the overhead projector 10, and the liquid crystal display section 80a is mounted on the overhead projector 10.
a is illuminated from below by the light source of the overhead projector 10, and the image of the liquid crystal display unit 80a is projected on a front screen (not shown).

As an apparatus using such an overhead projector, for example, Japanese Utility Model Laid-Open No. 63-15098
An image display device using the No. 5 liquid crystal panel, or
There is a microcomputer disclosed in JP-A-2-64721.

[0011]

However, in these conventional projectors for a liquid crystal panel, a projector separate from a computer is prepared in advance, and image data created by the computer is transferred to this projector and projected. Or, to mount and project the liquid crystal panel itself of the computer on the projector, a computer for image creation, and a projector for image projection,
Each one was required separately.

Generally, a projector device for enlarging and projecting a liquid crystal image includes a light source, a lens unit, a dedicated liquid crystal panel, a liquid crystal panel driving circuit, a signal processing circuit for processing image signals from a computer, an interface circuit, a power supply, and a cable. Etc., and is expensive and large. That is, if an image of a computer of a liquid crystal display type is to be displayed as a projection image, a dedicated device such as an expensive and large-sized liquid crystal projector and an overhead projector is separately required, and the cost, the installation space, or There were many inconveniences such as handling of installation and wiring and carrying.

Notebook and laptop computers employing a liquid crystal panel for the screen display section are widely used with the greatest features of portability, ease of installation, and low price due to their small size and light weight. Yes, the use of conventional projectors, which are expensive and large projection devices, significantly diminishes the benefits of such small liquid crystal computers.

In particular, in a use situation where a small computer such as a notebook computer has maximized its advantages, such as an external presentation, the conventional projector has a large size and a large weight. The problem has become apparent.

The present invention has been proposed in order to solve the problems of the prior art, and a display image of a computer can be enlarged by simply attaching a small and lightweight projector to a liquid crystal display of the computer. An object of the present invention is to provide a projector that can project images, is easy to handle and carry, has a low price, and does not require a special installation space.

[0016]

In order to achieve the above object, a projector according to a first aspect of the present invention comprises a transmissive liquid crystal panel and a back plate provided with a backlight for illuminating the liquid crystal panel from the rear. A projector having a liquid crystal display unit having a detachable rear panel, and displaying a display image of a notebook or laptop computer on a screen as a projected image, wherein the rear panel is removed. It has a hollow housing that houses the liquid crystal display
Liquid crystal display with the back plate removed over the surface and both sides
A projector main body having a slit with which the indicating portion is engaged, and a projector main body disposed above the projector main body and facing downward.
A light source unit that emits light, and a light source unit disposed below the light source unit;
Reflecting mirror for reflecting light from the light source unit to the liquid crystal panel
And a light source means for illuminating the liquid crystal panel from the front,
A lens unit attached to a rear surface of the projector main body and positioned behind a liquid crystal panel housed in the projector main body.
Attached to the liquid crystal display of the computer along the slit
The liquid crystal display is fixed at a predetermined angle
The lower surface is the upper surface of the computer while being stored and held.
, And mounted and fixed on the computer .

Further , the projector according to the second aspect is characterized in that
Reflector located behind the lens of the projector
And a transmission screen arranged in the reflection direction of the reflector.
And a viewer having a viewer.

Further, the projector according to claim 3 is
The viewer is detachably attached to the projector body.
It has been done.

According to the projector of the present invention having such a configuration, the projector body with a light source unit and the lens unit, by attaching accommodating the liquid crystal display unit of the computer, a liquid crystal display unit of the computer-side projector The projector can be used as a liquid crystal display unit, which can enlarge and project the image of the computer. This makes the whole projector smaller and lighter, which makes it extremely easy to handle and carry. Price can also be realized.

Further, since the projector of the present invention can be mounted simply by fitting the projector main body into the liquid crystal display portion of the computer along the slit from above, no troublesome wiring and connection with the computer are required. Installation and installation are easy, and no special space is required for projector installation.

[0021]

Embodiments of the present invention will be described below with reference to the accompanying drawings. First Embodiment First, a first embodiment of a projector according to the invention will be described with reference to FIGS. FIG. 1 is a partially cutaway side view showing a state in which a projector according to a first embodiment of the present invention is mounted on a computer. FIG. 2 is a rear perspective view showing a computer for mounting and using the projector of the present embodiment.

[0022] First, a description about the computer 8 for use in mounting the projector of the present embodiment. As shown in FIG. 2, the computer 8 is a notebook computer in which a liquid crystal display unit 8a for displaying a created image is rotatably attached to the main body of the computer 8.

[0023] Then, the liquid crystal display unit 8a includes a liquid crystal panel 8b of the transmission type, has a back plate 8c having a backlight or the like for illuminating the liquid crystal panel 8b from the rear,
The rear plate 8c is configured to be detachable from the liquid crystal display unit 8a.

[0024] That is, the liquid crystal display unit 8a, the back plate 8c
By removing this, both the front surface and the back surface of the liquid crystal panel 8b are exposed. In the computer 8 shown in FIG. 2, the back plate 8c is fitted into an opening formed on the back of the liquid crystal display unit 8a as a detachable structure of the back plate 8c.
c can be made detachable from the liquid crystal display unit 8a by means such as screwing. 8d is a keyboard for performing computer operations.

Next, will be described projector of the present embodiment to be used mounted on such a computer 8. In FIG. 1, reference numeral 1 denotes a projector main body constituting the projector of this embodiment, which is mounted on the computer 8 from above the liquid crystal display section 8a with the back plate 8c removed, and houses the liquid crystal display section 8a inside. It is formed in a housing shape that can be made.

[0026] That is, the projector main body 1 has become inside a hollow, toward both sides from the bottom, the rear plate 8
1 can be engaged with the liquid crystal display section 8a from which the liquid crystal display section c has been removed.
a is formed. Thereby, the projector body 1
The liquid crystal display 8a is fixed at a predetermined angle to be housed and held by being fitted into the liquid crystal display 8a along the slit 1a, and the lower surface of the liquid crystal display 8a It is to be mounted and fixed on.

[0027] As the material of the projector main body 1, similar to those used in the conventional liquid crystal projector is not particularly limited, but is preferably made of plastic from the surface, such as weight reduction and manufacturing cost. Further, in this embodiment, as shown in FIG. 1, the handle 1b is protruded from the upper surface of the projector main body 1, but this is for facilitating the handling of the projector main body 1, and may be omitted or added as appropriate. be able to.

The inside of the projector body 1, together with the light source unit 2 and the reflection mirror 3 as a light source means is arranged on the back surface of the projector main body 1, the lens unit 4 is attached. As shown in FIG. 1, the light source unit 2, the reflecting mirror 3 and the lens unit 4 include a liquid crystal display unit 8 a fitted into the projector main body 1, and a liquid crystal display unit 8 a between the light source unit 2 and the reflecting mirror 3 and the lens unit 4. It is arranged to be located.

The light source section 2 is disposed above the projector main body 1 and is mounted so as to emit white light downward. A reflecting mirror 3 is provided below the light source unit 2 so that the light from the light source unit 2 is reflected toward the liquid crystal display unit 8a that is fitted and stored.

Further , a lens unit 4 for receiving light from the reflecting mirror 3 and irradiating the light to the outside of the projector body 1 is attached to the opposite side of the liquid crystal display unit 8a, that is, on the back side of the projector body 1. I have. As a result, the light emitted from the light source unit 2 is reflected by the reflecting mirror 3 and illuminates the liquid crystal panel 8b of the liquid crystal display unit 8a from the front, and this light transmits through the liquid crystal panel 8b and passes through the lens unit 4
And is radiated toward a screen 9 provided behind the projector main body 1.

As shown in FIG. 1, the light source unit 2 emits light downward so that the keyboard of the computer 8 can be operated even if the projector body 1 is mounted on the computer 8. To do that. That is, since the light source unit 2 is disposed above the inside of the projector main body 1, the outer shape of the projector main body 1 can be formed in a vertically long shape, and even when the projector 8 is mounted on the computer 8, the keyboard 8d of the computer 8 can be operated. Space can be secured. Thus, even while the image is being projected by the projector, it is possible to switch or change the projected image by operating the keyboard 8d.

[0032] Therefore, if it is not required such a keyboard operation, for example, if the projected image is not required and the like change in a single or, if the computer operated by a mouse or the like regardless of the keyboard is enabled, the light source unit 2 And the lens unit 4 may be arranged on the same straight line so that the liquid crystal panel 8b is directly irradiated with light. In that case, the reflecting mirror 3 can be omitted, and the light source means is constituted by the light source unit 2.

Furthermore, as shown in FIG. 1, the projector of the present embodiment, in the vicinity of the light source section 2 of the projector main body 1, but the fan 5 for cooling is provided, it may be omitted or added to it as appropriate it can.

[0034] Next, the operation of the projector of the present embodiment having such a configuration. First, an image to be enlarged and projected is created by the computer 8, and the liquid crystal display unit 8a
To be displayed. Next, the rear plate 8c of the liquid crystal display unit 8a is removed, and the liquid crystal panel 8b is exposed. In this state, the projector main body 1 is fitted into the liquid crystal display section 8a from above, mounted on the computer 8, and the liquid crystal display section 8a is stored in the projector main body 1.

[0035] Then, by driving the light source unit 2, to emit white light. The white light (arrow A in the figure) emitted by the light source unit 2 is reflected by the reflecting mirror 3 and enters the liquid crystal panel 8b on which an image is displayed from the front, and the white light is a liquid crystal on which an image is displayed. The image light (arrow B in the figure) is transmitted by passing through the panel 8b. And this image light,
The light passes through the lens unit 4 and becomes projection light (arrow C in the figure).
An image is formed on a screen 9 provided behind the projector main body 1 and displayed as a projected image.

[0036] Thus, according to the projector of the present embodiment, by installing mounting the projector body 1 having a light source unit 2 and the lens unit 4 in the liquid crystal display unit 8a of the computer 8, the computer 8 side liquid crystal Display unit 8a
Can be used as a liquid crystal display unit of the projector, and the image of the computer 8 can be enlarged and projected. Therefore, the whole projector is small and lightweight, handling and carrying are extremely easy, and the number of parts is reduced. Low price can also be realized.

Further, since the projector of the present invention can be mounted simply by fitting the projector main body 1 into the liquid crystal display section 8a of the computer 8 from above, wiring and connection with the computer 8 become unnecessary. Installation and installation are easy, and no special space is required for projector installation.

[0038] [Second Embodiment] Next, a second embodiment of the projector of the present invention will be described with reference to FIG. FIG. 3 is a partially cut-away side view showing a state where a projector according to a second embodiment of the present invention is mounted on a computer.

As shown in the figure, the projector of this embodiment is a modification of the projector according to the first embodiment described above, and has a viewer 6 attached to the back of the projector main body 1. The viewer 6 has a housing shape detachably fitted to the rear side of the projector main body 1 and is formed so as to cover the lens unit 4 on the rear surface of the projector main body 1.

[0040] Then, inside of the viewer 6, reflector located behind the lens portion 4 of the projector main body 1 6
a and a transmissive screen 6b positioned in the direction of reflection of the reflecting mirror 6a, that is, in the front direction of the computer 8. Then, the projection light emitted from the lens unit 4 of the projector body 1 is reflected by the reflecting mirror 6a and is displayed on the screen 6b.

[0041] That is, by providing the viewer 6, so that the image displayed on the liquid crystal display unit 8a of the computer 8 is enlarged and displayed on the screen 6b. Generally, a liquid crystal display portion of a small computer such as a notebook computer is small in size of A4 or less in consideration of portability of the computer and the like. I can't say.

[0042] Therefore, in the projector of the present embodiment,
By providing the viewer 6 for enlarging and projecting the liquid crystal display unit 8a of the computer 8 and displaying it on the operator side, the visibility of the display image of the computer 8 is improved. As a result, even a small computer such as a notebook computer can secure a screen size equivalent to that of an expensive CDT (CRT) display used in a desktop computer, and display images with higher visibility. be able to.
Note that the projector of the present embodiment can be used as the projector shown in the above-described first embodiment by removing the viewer 6.

[0043]

As described above, according to the projector of the present invention, the display image of the computer can be enlarged and projected simply by attaching the small and lightweight projector to the liquid crystal display section of the computer, and the handling and carrying are easy. It is easy, the product is inexpensive, and no special installation space is required.

[Brief description of the drawings]

FIG. 1 is a partially cutaway side view showing a first embodiment of a projector according to the invention.

FIG. 2 is a rear perspective view showing a computer for mounting and using the projector of the present invention.

FIG. 3 is a partially cutaway side view showing a second embodiment of the projector of the present invention.

FIG. 4 is a partially cutaway side view showing a conventional projector.

FIG. 5 is a perspective view showing another conventional projector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Projector main body 1a ... Slit 2 ... Light source part 3 ... Reflecting mirror 4 ... Lens part 5 ... Fan 6 ... View 8 ... Computer 8a ... Liquid crystal display part 9 ... Screen

Claims (3)

(57) [Claims] 1. A notebook type having a transmissive liquid crystal panel and a back plate provided with a backlight or the like for illuminating the liquid crystal panel from behind, wherein the back plate has a detachable liquid crystal display unit. A projector for displaying a display image of a computer such as a laptop type on a screen as a projection image, wherein a hollow housing for accommodating a liquid crystal display unit from which the back plate is removed.
Take the shape of a body and attach the back plate over the bottom and both sides.
A projector body formed with a slit for engaging the removed liquid crystal display unit, and a projector body disposed above the projector body and having a downward light
A light source that emits light, and
A reflector is provided to reflect light from the light source to the liquid crystal panel.
For example, a light source means for illuminating the liquid crystal panel from the front, the attached to the back of the projector body, comprising: a lens unit which is positioned behind the liquid crystal panel accommodated in the projector body, the said projector main body, Along the slit
The liquid is inserted into the liquid crystal display of the computer.
While holding and holding the crystal display part at a predetermined angle,
Surface of the computer
A projector that is mounted and fixed on a projector. 2. The projector according to claim 1, further comprising a viewer having a reflecting mirror located behind a lens unit of the projector body and a transmission screen disposed in a reflecting direction of the reflecting mirror. 3. The projector according to claim 2, wherein the viewer is configured to be detachable from the projector main body.