JPH0749533A - Projector device - Google Patents

Abstract

(57) [Summary] [Purpose] A projector that can be used both as a clean built-in type that can display good images day and night and as an external screen projection type that can project and display large screen images. Provide a device. An optical path switching means for switching a projection optical path from the image display means to an apparatus main body 1 equipped with an image projection unit 3 having an image display means and a drive circuit therefor and a projection lens, and a first screen 5. By providing the rotating mirror 4 of the above, the image displayed by the image display means is provided to the transmissive screen 5 incorporated in the apparatus main body 1 and the large area reflective screen S arranged outside the apparatus main body 1. It is designed to project selectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector device.

[0002]

2. Description of the Related Art Projector devices include an external screen projection type device for projecting and displaying an image on an external screen disposed separately from the projector device main body, and a screen for projecting and displaying an image on the screen provided on the device main body. Some are built-in types.

The external screen projection type projector device is provided with an image display means such as a liquid crystal display panel or a cathode ray tube in a projector device main body having an image projection window, and an image displayed by the image display means is displayed on the projection window. The image is enlarged and projected on the surface of the external screen (reflection type screen) by the projection lens provided in the projector. According to this projector device, a large screen image such as a 50-inch screen can be displayed.

Further, a screen-embedded type projector device is provided with an image display window provided with a transmissive screen on the front surface of the projector device main body, and in the device main body,
Image display means (liquid crystal display panel, cathode ray tube, etc.)
And a projection lens for projecting an image displayed by the image display means, and a display image of the image display means is enlarged by the projection lens to form an image on a transmissive screen surface on the front surface of the apparatus main body. In this projector device,
Although its display screen is limited to a medium screen of about 10 to 14 inches, it has an advantage that it can be easily used because it does not require an external screen unlike a projector device of an external screen projection type.

[0005]

However, although the external screen projection type projector device can project and display a large screen image, a good projection image cannot be obtained unless the surroundings are darkened as the projection environment. Not suitable for daytime use.

In addition, since the above-mentioned screen-embedded type projector device does not require a dark environment, it can display a good image regardless of day or night. There is a restriction on the size of the screen, and therefore a large screen display cannot be expected.

For this reason, conventionally, an external screen projection type and a screen built-in type are selectively used according to the projection environment and the purpose of use.
Two types of projector devices are required.

The present invention provides a projector device which can be used as a clean built-in type device capable of displaying a good image regardless of day or night and as an external screen projection type device capable of projecting and displaying a large screen image. It is intended for.

[0009]

A projector device according to the present invention comprises an image display means, a drive circuit for driving the image display means, a projection lens for projecting an image displayed by the image display means, and a first lens. A projector device main body including a screen; and a second screen having a larger area than the first screen and arranged outside the device main body, and the image display means in the device main body. An optical path switching means for selectively switching the projection optical path from the optical path toward the first screen and the optical path toward the second screen is provided.

In the projector device of the present invention, when the first screen is a transmissive screen and the second screen is a reflective screen, an image projected on the first screen is displayed on the device body. The second
It is desirable to provide image reversing means for reversing the image projected on the screen of FIG.

[0011]

According to the projector apparatus of the present invention, the apparatus main body including the image display means and its drive circuit, the projection lens, and the first screen is provided with the optical path switching means for switching the projection optical path from the image display means. An image displayed by the image display means is selectively projected on a first screen incorporated in the apparatus main body and a large-area second screen arranged outside the apparatus main body. Therefore, it can be used as a clean built-in type capable of displaying a good image regardless of day and night, or as an external screen projection type capable of projecting and displaying a large-screen image.

In the projector device of the present invention, the first screen is a transmissive screen,
When the second screen is a reflective screen, the image projected on the first screen and the image projected on the second screen may be inverted by the image inversion means. If you do, the first transparent type
Both the image projected on the screen and the image projected on the reflective second screen can be seen as the correct image.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. FIG. 1 is a plan view of a projector device.
(A) shows a state in which an image is projected on a first screen incorporated in the apparatus main body, and (b) shows a state in which an image is projected on a second screen arranged outside the apparatus main body. . Further, FIG. 2 is a perspective view of an image projection unit provided in the apparatus main body.

The structure of the projector apparatus of this embodiment will be described. In FIG. 1, reference numeral 1 is a projector apparatus main body, and the apparatus main body 1 has window portions 2 on two side surfaces.
It is composed of a case body provided with a and 2b.

An image projection unit 3 is provided in the apparatus body 1. This image projection unit 3
Image by image display means (for example, television image)
Is displayed and the image light thereof is projected forward. In this embodiment, a liquid crystal display panel is used as the image display means.

The structure of the image projection unit 3 will be described. In FIG. 2, 10 is a case of the image projection unit, an image projection window 11 is opened on the front surface of the case 10, and an image is provided in the case 10. A display unit 12 is provided.

In the image display unit 12, a dot matrix liquid crystal display panel 14 is provided on a support plate 13 provided upright on the bottom surface of the case so as to face the image projection window 11, and a liquid crystal display panel is provided on the support plate 13. A total of three display panel drive circuit boards 15 are arranged above and below one side 14
And 16 and 16 are provided.

The support plate 13 is provided with an opening (not shown) slightly larger than the display screen 14a of the liquid crystal display panel 14 at the display panel mounting portion. Further, one circuit board 15 provided on one side of the liquid crystal display panel 14 is a scanning side drive circuit board, and two circuit boards 16 and 16 provided above and below the liquid crystal display panel 14 are signal side drive circuit boards. And these circuit boards 15 and 16, 1
6 is a film-like heat seal connector 1
The terminals 7 and 17 are connected to the terminal array portion of the liquid crystal display panel 14.

Further, a light source for supplying light to the liquid crystal display panel 14 is provided at the rear portion of the case 10. The light source includes a light source lamp 18 and a reflector 19 having a cold mirror formed on the inner surface thereof. The light source lamp 18 and the reflector 19 are attached to a lamp mount 20 having a lamp cooling fan built therein. The light source lamp 18 is a halogen lamp or a xenon lamp in order to make the light source as bright as possible. Reference numeral 21 is a lamp power supply unit.

In FIG. 2, 22 is a condenser lens provided between the light source lamp 18 and the liquid crystal display panel 14, and 23 is a relay lens provided between the condenser lens 22 and the liquid crystal display panel 14. (Aspherical lens), and the condenser lens 22 and the relay lens 23 are attached to a lens support 24.

Reference numeral 25 denotes a condenser lens provided in front of the liquid crystal display panel 14, and the condenser lens 25 is a lens barrel 2 supported by a lens support 26 so as to be movable in the optical axis 0 direction.
It is provided in 5a.

On the other hand, 27 is a linear circuit board provided in the case 10, and this linear circuit board 27 is connected to each display panel drive circuit board 15 and 16, 16 of the liquid crystal display section 12 by a cable not shown. There is.

The linear circuit board 29 is connected to a receiving unit (not shown, which is provided in the apparatus main body 1) including a television radio wave receiving circuit, a speaker, and the like. On the other hand, 28 is an infrared absorption filter provided between the light source lamp 18 and the liquid crystal display panel 14, for example, between the light source lamp 18 and the condenser lens 22, and the infrared absorption filter 28 is the filter mounting plate 2.
It is attached to 9.

Reference numeral 30 denotes a display panel cooler provided inside the case 10 so as to be positioned beside the liquid crystal display section 12. Although not shown, the display panel cooler 30 is provided with a blower fan inside the body having an intake opening that is opened to the outside of the case 10. A flat cooling air outlet 31 is provided for blowing the cooling air blown by the blowing fan toward the liquid crystal display panel 14 of the liquid crystal display unit 12.

The liquid crystal display panel 14 is provided so as to be inclined by an appropriate viewing angle (about 10 to 20 °) with respect to the optical axis 0 so that the appropriate viewing angle direction coincides with the optical axis 0. There is.

The image projection unit 3 displays a television image on the liquid crystal display panel 14 and projects the image light from the image projection window 11 forward.
The illumination light from the light source lamp 18 reflected by 9 first passes through the infrared absorption filter 28 to absorb the infrared component, and then the condenser lens 22 and the relay lens 2
After that, the liquid crystal display panel 14 is illuminated from the back side thereof through Step 3. Then, the light that has passed through the liquid crystal display panel 14, that is, the image light corresponding to the display image on the liquid crystal display panel 14, passes through the condenser lens 25 and is projected from the image projection window 11.

On the other hand, of the two windows 2a and 2b provided in the apparatus main body 1, the first window 2a serves as a display window for displaying an image, and the second window 2b is provided in the apparatus main body 1. It is a projection window portion that projects an image on a reflective second screen (hereinafter referred to as an external screen) S that is arranged outside,
The display window portion (first window portion) 2a is provided with a transmissive first screen (hereinafter referred to as transmissive screen) 5.

Further, in the device body 1, a projection optical path from the liquid crystal display panel 14 which is an image display means, that is, an optical path of image light projected from the image projection unit 3 is provided in the display window portion 2a. The rotating mirror 4 is provided as an optical path switching unit that selectively switches between an optical path toward the transmissive screen 5 and an optical path toward the reflective screen S disposed outside the apparatus body 1.

The rotating mirror 4 is used for the image projection unit 3
Is positioned in front of (in front of the image projection window 11) and is disposed inside the apparatus main body 1. The first posture shown in FIG. 1A and the second posture shown in FIG. It is adapted to be selectively rotated depending on the posture. In addition, this rotating mirror 4
Is automatically rotated by an electric mechanism such as a solenoid,
Alternatively, it is manually rotated.

In FIG. 1, 6a is a first optical path for guiding the image light from the image projection unit 3 to the display window portion 2a,
6b is a second optical path for guiding the image light from the image projection unit 3 to the projection window 2b.

The first optical path 6a has the rotating mirror 4
Is an optical path that directly guides the image light reflected in the first direction by the rotating mirror 4 to the display window 2a, which is formed by rotating the display window 2a as shown in FIG. The image light guided to the first optical path 6a is magnified by the middle screen projection lens 7a provided on the first optical path 6a, and is formed on the surface of the transmissive screen 5 as a middle screen image (about 10 to 14 inches). Image.

The second optical path 6b is reflected by the rotating mirror 4 in the second direction by rotating the rotating mirror 4 to the posture shown in FIG. 1 (b). The image light guided to the projection window 2b through the second optical path 6b is a second optical path for guiding the image light to the projection window 2b through one fixed mirror 8a. Enlarged by the large screen projection lens 7b provided in the section 2b,
An image of a large screen (about 50 inches) is formed on the surface of the reflection type external screen S.

The middle screen projection lens 7a is fixed at a position spaced a certain distance from the transmissive screen 5, but the large screen projection lens 7b corresponds to the distance from the external screen S. It is movably provided so that focusing can be performed.

The condenser lens 25 of the image projection unit 3 is positionally adjusted so that the image light is condensed on the middle screen projection lens 7a when an image is projected and displayed on the surface of the transmissive screen 5, When the image is projected and displayed on the screen S surface, the position is adjusted so that the image light is condensed on the large-screen projection lens 7b. The position adjustment of the condenser lens 25 is performed automatically by an electric mechanism such as a solenoid or manually.

In this projector device, when projecting and displaying an image of the middle screen on the transmissive screen 5 incorporated in the device body 1, the turning mirror 4 is turned to the posture shown in FIG. When a large-screen image is projected and displayed on the external screen S, the rotating mirror 4 is used by rotating it to the posture shown in FIG.

When the rotating mirror 4 is rotated to the posture shown in FIG. 1A, the image light from the image projection unit 3 is reflected by the rotating mirror 4 toward the first optical path 6a, The image light is magnified by the middle screen projection lens 7a and forms an image on the surface of the transmissive screen 5 of the display window 2a.

In this case, the image projected on the transmissive screen 5 from the inner surface side thereof is an image in which the left and right are inverted by the middle screen projection lens 7a.
When viewed from the outer surface side (outside of the apparatus main body 1), the image projected on the transmissive screen 5 looks left and right,
The image displayed on the outer surface of the transmissive screen 5 is the same normal image as the display image of the liquid crystal display panel 14 of the projection display image projection unit 3 (the image viewed from the image projection window 11 side).

When the rotating mirror 4 is rotated to the posture shown in FIG. 1B, the image light from the image projection unit 3 is reflected by the rotating mirror 4 toward the second optical path 6b. The image light is magnified by the large screen projection lens 7b of the projection window 2b and is focused on the reflection type external screen S surface.

In this case, when the image light reflected by the rotating mirror 4 directly enters the large screen projection lens 7b, the image projected on the external screen S surface by the large screen projection lens 7b is inverted right and left. However, in the projector device, the image light is reflected by the fixed mirror 8a and guided to the large screen projection lens 7b.
The image projected on the surface of the external screen S also becomes the same normal image as the display screen of the liquid crystal display panel 14 of the projection display image projection unit 3.

That is, this projector device is provided with an optical path switching means for switching the projection optical path from the liquid crystal display panel 14 which is an image display means, so that the image displayed by the liquid crystal display panel 14 is incorporated in the apparatus main body 1. The transparent transmission screen 5 and the large-area external screen S arranged outside the apparatus body 1 are selectively projected, and therefore, a clean built-in device capable of displaying a good image regardless of day or night. It can be used as a type or as an external screen projection type capable of projecting and displaying a large screen image.

Further, this projector device is provided with the image inverting means for inverting the image projected on the transmissive screen 5 incorporated in the device main body 1 and the image projected on the reflective external screen S with respect to each other. The image projected and displayed on the reflective external screen S and the image projected and displayed on the transmissive screen 5 of the apparatus body 1 can be viewed as correct images.

In the above embodiment, the first optical path 6a for guiding the image light reflected by the rotating mirror 4 to the display window 2a is an optical path for directly guiding the image light to the display window 2a. The first optical path 6a may be configured to guide the image light to the display window portion 2a via a fixed mirror. Even in that case, if the number of fixed mirrors is an even number, the same effect as the above embodiment can be obtained. .

Further, in the above embodiment, the second optical path 6b for guiding the image light reflected by the rotating mirror 4 to the projection window 2b is passed through the projection window 2b through the fixed mirror 8a. The second optical path 6b.
Is a projection window portion 2b for projecting image light through a plurality of fixed mirrors.
The same effect as that of the above embodiment can be obtained if the number of fixed mirrors is an odd number.

FIG. 3 shows a second embodiment of the present invention. This embodiment shows a rotating mirror 4 which is an optical path switching means.
The first optical path 6a that guides the optical image reflected by the display window 2a to the display window 2a via the two fixed mirrors 8a and 8c is reflected by the rotating mirror 4. The second optical path 6b for guiding the generated image light to the projection window 2b is configured to guide the image light to the projection window 2b via one fixed mirror 8a.

Further, in the above embodiment, the turning mirror 4 is arranged in front of the image projection unit 3, but the turning mirror 4 may be provided at another position. That is, FIG. 4 shows a third embodiment of the present invention. In this embodiment, a fixed mirror 8d is provided in front of the image projection unit 3, and the image light reflected by the fixed mirror 8d is passed through the optical path. The rotating mirror 4, which is a switching unit, selectively reflects the light in the first direction and the second direction.

When the fixed mirror 8d is interposed between the image projection unit 3 and the rotating mirror 4 as described above,
If the other configurations are the same as those of the first embodiment, the directions of the images projected and displayed on the transmissive screen 5 and the external screen S are reversed.

Therefore, in this embodiment, the rotating mirror 4
First optical path 6 for guiding the image light reflected by the display window 2a
a is configured to guide the image light to the display window portion 2a directly (or directly in this embodiment) via an even number of fixed mirrors,
The image light reflected by the rotating mirror 4 is projected onto the projection window 2b.
The second optical path 6b leading to the
The image light is guided to the projection window section 2b through the fixed mirrors 8e, and an image projected on the transmissive screen 5 provided in the display window section 2a and a reflection type image from the projection window section 2b. The image projected on the external screen S of FIG.
Correct images can be projected and displayed on the transmissive screen 5 and the external screen S surface.

Further, in the above embodiment, the projection optical path from the liquid crystal display panel 14 which is the image display means is directed in the direction 2 by the turning mirror 4. However, the switching of the projection optical path is It may be performed by rotating the image projection unit 3.

FIG. 5 shows a fourth embodiment of the present invention. In this embodiment, the image projection unit 3 is placed in the first position shown in FIG. The image projection unit 3 is configured to be rotatable about the support shaft 9 by an electric mechanism such as a solenoid, or manually.

In this embodiment, the first optical path 6a for guiding the image light from the image projection unit 3 to the display window 2a having the transmissive screen 5 is an odd number (one in this embodiment). The image light from the fixed mirror 8f is guided to the display window 2a, and the second optical path 6b that guides the image light from the image projection unit 3 to the projection window 2b is an even number (two in this embodiment). ), The image light is guided to the projection window portion 2b through the fixed mirrors 8g and 8h, so that the image projected on the transmissive screen 5 and the image projected on the reflective external screen S are mutually inverted. By doing so, the same effect as that of the first embodiment described above can be obtained.

FIG. 6 shows a fifth embodiment of the present invention. In this embodiment, the image projection unit 3 is rotatably provided in two postures, and the image projection unit 3 is also provided.
The first optical path 6a for guiding the image light from the display window 2a to
The second optical path 6 that guides the image light from the image projection unit 3 to the projection window 2b is configured such that the image light is guided to the display window 2a via an odd number (one in this embodiment) of fixed mirrors 8f.
The image projected on the transmissive screen 5 and the image projected on the reflective external screen S are inverted from each other by configuring b so that the image light is directly guided to the projection window portion 2b. Also in this embodiment, the same effect as in the first embodiment can be obtained.

Although each of the above-described embodiments is adopted when a normal image is displayed on the liquid crystal display panel 14 of the image projection unit 3, when the left and right images are displayed on the liquid crystal display panel 14, the above-mentioned embodiments are adopted. The display window portion 2a and the projection window portion 2b in each embodiment may be reversed.

Although the projector device of each of the above embodiments displays an image by using the liquid crystal display panel 14, the image display means may be a cathode ray tube, and the present invention displays a television image. The present invention is not limited to projection display, but can be widely applied to projector devices that project and display various images such as game images.

[0054]

According to the projector apparatus of the present invention, an optical path switching means for switching the projection optical path from the image display means is provided in the apparatus main body provided with the image display means and its drive circuit, the projection lens and the first screen. Thus, the image displayed by the image display means is selectively projected on the first screen provided in the projector device and the large-area second screen arranged outside the device body. Since it is a clean built-in type that can display good images day and night,
It can also be used as an external screen projection type capable of projecting and displaying a large screen image.

In the projector device of the present invention, the first screen is a transmissive screen,
When the second screen is a reflective screen, the image projected on the first screen and the image projected on the second screen may be inverted by the image inversion means. If you do, the first transparent type
Both the image projected on the screen and the image projected on the reflective second screen can be seen as the correct image.

[Brief description of drawings]

FIG. 1 is a plan view of a projector device showing a first embodiment of the present invention, where (a) is a state in which an image is projected on a first screen incorporated in the main body of the device, and (b) is a projector. The state which is projecting the image on the 2nd screen arrange | positioned outside the apparatus main body is shown.

FIG. 2 is a perspective view of an image projection unit provided in the projector device main body.

FIG. 3 is a plan view of a projector device showing a second embodiment of the present invention, in which (a) is a state in which an image is projected on a first screen incorporated in the projector device main body,
(B) shows a state in which an image is projected on a second screen arranged outside the projector apparatus main body.

FIG. 4 is a plan view of a projector device showing a third embodiment of the present invention, FIG. 4A is a state in which an image is projected on a first screen incorporated in the projector device main body,
(B) shows a state in which an image is projected on a second screen arranged outside the projector apparatus main body.

FIG. 5 is a plan view of a projector device showing a fourth embodiment of the present invention, in which (a) is a state in which an image is projected on a first screen incorporated in the projector device main body,
(B) shows a state in which an image is projected on a second screen arranged outside the projector apparatus main body.

FIG. 6 is a plan view of a projector device showing a fifth embodiment of the present invention, in which (a) is a state in which an image is projected on a first screen incorporated in the projector device main body;
(B) shows a state in which an image is projected on a second screen arranged outside the projector apparatus main body.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Device main body 2a ... Display window 2b ... Projection window 3 ... Image projection unit 14 ... Liquid crystal display panel 15, 16 ... Display panel drive circuit board 22 ... Condenser lens 23 ... Relay lens 25 ... Condenser lens 4 ... Rotation Mirror 5 ... Transmissive screen (first screen) 6a, 6b ... Optical path 7a ... Medium screen projection lens 7b ... Large screen projection lens 8a-8h ... Fixed mirror S ... External screen (second screen)

Claims (2)

[Claims] 1. A projector apparatus main body comprising an image display means, a drive circuit for driving the image display means, a projection lens for projecting an image displayed by the image display means, and a first screen, A second screen which is larger in area than the first screen and is arranged outside the apparatus body, and a projection optical path from the image display means is provided on the apparatus body. Optical path towards the second
The optical path switching means for selectively switching to the optical path toward the screen of the projector device. 2. The first screen is a transmissive screen, the second screen is a reflective screen, and the projector device main body has an image projected on the first screen and an image projected on the second screen. The projector device according to claim 1, further comprising image inverting means for inverting each other.