JPH07295678A - Projection display device for portable information equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a display device for a portable information device capable of reducing the weight of the entire portable information device and reducing the manufacturing cost. A projector 1 is provided as a display device incorporated in a main body 11 of a portable information device such as a personal computer.
A projection type display device composed of 3 and a screen 15 is adopted. The screen 15 is provided on the back surface of the lid 14 of the information device. The projection device 13 is fixed at a predetermined angle with respect to the lid 14, and is stored inside the main body of the information device as the lid is closed. Also, when the lid angle is changed, the relative positional relationship with the screen remains unchanged. To be immutable. The output information of the information device is displayed on the transmissive liquid crystal panel of the projection device 18, the light source,
It is enlarged and displayed on the screen through the magnifying lens and the refracting lens. [Effect] It is not necessary to incorporate a display drive circuit in the lid, and the thickness and weight of the lid can be reduced. The display element can be downsized and the cost can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is incorporated in a portable information device such as a relatively small personal computer or a word processor, and a projection type display device for a portable information device which enlarges and displays output information of the information device on a screen. Regarding

[0002]

2. Description of the Related Art A display device of a conventional portable information device such as a personal computer or a word processor is
In order to display the output information of the information equipment, a display element such as a liquid crystal or plasma is installed in the screen in the same size and shape as the screen to be displayed.

Further, it is necessary to incorporate a drive circuit for controlling each display element forming a character or an image into the display screen.

[0004]

As described above, since the conventional display device for a portable information device displays the output information of the information device in the same size, the display device of the entire screen is displayed. There is a problem that the size becomes large and the manufacturing cost of the display device is high.

Further, since it is necessary to incorporate a drive circuit for controlling the display element in the display screen, the thickness of the display screen portion which also serves as the lid of the portable information device is increased, and the weight of the entire information device is increased. There was also a problem.

The present invention has been made in view of these problems, and an object thereof is to display an output information of a portable information device in an enlarged manner by a small projection mechanism and to display a screen portion which also serves as a lid of the information device. It is an object of the present invention to provide a projection display device for a portable information device, which can reduce the weight of the entire information device by reducing the thickness of the device.

[0007]

In order to achieve the above object, the present invention is a display device which is incorporated in a portable information device and displays output information of the portable information device. A projection device for enlarging and projecting the output information such as an image; and a screen for displaying an image projected from the projection device, which is disposed on the back side of the lid of the portable information device. Characterize.

Also, in the present invention, it is preferable that the projection device is fixed at a predetermined angle with respect to the lid, and the projection device is housed in the main body of the portable information device when the lid is closed. Can be characterized.

Further, in the present invention, preferably, the projection device is illuminated by the liquid crystal display element panel for displaying output information of the portable information equipment, a light source for illuminating the liquid crystal display element panel, and the light source. An optical system for magnifying and projecting an image of the liquid crystal display panel can be included.

Further, the present invention is preferably characterized in that the optical system includes a magnifying lens and a refracting lens.

[0011]

In the present invention, the output information of the information equipment is enlarged and projected by the projection device having the transmissive liquid crystal panel and the optical system inside, and displayed on the screen provided on the lid. Since the projection device is fixed to the rotary shaft that is integrated with the lid, the relative positional relationship with the screen remains unchanged even when the lid angle is changed, and the projection device is stored inside the information device body when the lid is closed. It

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 shows the overall external configuration of a portable information device according to an embodiment of the present invention. In FIG. 1, 11 is a main body of a portable information device, 12 is a keyboard arranged on the surface of the main body 11, and these have the same structure as a conventional portable information device. Reference numeral 13 is a projection device that constitutes the projection display device according to the present invention, and enlarges and projects the output information of the information device such as characters, figures, or images. Reference numeral 14 is a lid of the portable information device, and a screen indicated by 15 is incorporated in the back surface of the lid 14.
In this case, since the lid 14 of the information device does not need to incorporate an electronic circuit relating to image display, it is possible to reduce the thickness of the lid and reduce the weight of the lid of the portable information device. .

For the same reason as above, the screen 15 can be set large on the entire lid of the information device.

The output information of the information device is output to a liquid crystal panel described later in the projection device 13 and enlarged and displayed on the screen 15 via an optical system described later. As a material for the screen 15, a white resin having no surface gloss is suitable. 1
Reference numerals 6 and 17 are volumes or sliders for adjusting the brightness and contrast of the image displayed on the screen 15. In addition, the projection device 13 is the lid 1 of the information device.
4 is fixedly installed on the rotary shaft of No. 4, and the cutout portion 1 is formed on the information device main body 11 when the lid 14 is opened and closed.
8 has a structure that can be stored inside.

Next, the details of the structure of the above projection device 13 will be described in detail with reference to the schematic views of FIGS. 2 shows a state in which the lid is opened, and FIG. 3 shows a state in which the lid is closed. In FIG. 2, reference numeral 22 is a housing that forms the outer shape of the projection device. Inside the housing 22, at position 24,
A display element drive circuit for displaying output information of the portable information device is incorporated, and a display element formed of a transmissive liquid crystal panel is installed at position 25. The image drawn on the surface of the display element 25 is projected by the light source 23.
As the light source 23, a white light source such as a halogen lamp is suitable in consideration of the case where the display target is a color image. The image on the display element 25 projected by the light from the light source 23 is a magnifying lens indicated by 26, and 2
28 is magnified and refracted by the refracting lens 7
Displayed on the screen.

Explaining the size of the display element 25, in the case of a liquid crystal display element, the size of one pixel (element) is 5.
0 μm, the number of pixels of a standard information device (for example, personal computer) (640 × 400, or 64)
The display area that achieves 0 × 480) is 32 × 20 mm,
Alternatively, the size is 32 × 24 mm, which allows the housing 22 of the projection apparatus to be sufficiently miniaturized. For this downsizing, when the lid 29 of the information equipment is closed, the entire projection device can be stored inside the main body 21 of the information equipment as shown in FIG. Further, since the projection device 22 and the lid 29 of the information device are fixedly installed on the rotary shaft 30 while maintaining a predetermined angle, even when the angle of the lid 29 is changed,
The relative positional relationship between the projection device and the screen 28 is unchanged, so that the image displayed on the screen 28 is not distorted.

[0018]

As described above, according to the present invention, the following effects can be obtained.

(1) Since the projection type display device for projecting an image on the screen is adopted as the display device for portable information equipment, the electronic circuit can be eliminated in the lid portion of the portable information equipment. As a result, the thickness and weight of the lid can be reduced, which in turn can reduce the weight of the entire information device.

(2) Since the output information of the information equipment is enlarged and projected on the screen, the liquid crystal panel of the projection device can be downsized, and the manufacturing cost can be reduced as a display device for portable information equipment. You can

(3) Since the electronic circuit can be eliminated in the lid portion as described above, the screen can be formed large over the entire lid of the information device, and the display screen can be expanded.

(4) Since the projection device is fixed at a predetermined angle with respect to the lid of the information equipment, it can be stored inside the information equipment main body when the lid is opened and closed, and when the angle of the lid is changed. However, the relative positional relationship between the projection device and the screen remains unchanged, so that the image displayed on the screen is not distorted.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall external configuration of a portable information device according to an embodiment of the present invention.

FIG. 2 is a right side view showing the structure of the projection device when the lid of the information device of FIG. 1 is opened.

FIG. 3 is a cross-sectional view with the lid closed.

[Explanation of symbols]

 11 Portable Information Equipment Main Body 12 Keyboard 13 Projection Device 14 Lid 15 Screen 16 Brightness Adjustment Volume 17 Contrast Adjustment Volume 18 Notch (Space for Projector Storage) 21 Main Body 22 Housing 23 Light Source 24 Display Element Drive Circuit 25 Display element of transmissive liquid crystal panel 26 Magnifying lens 27 Refractive lens 28 Screen 29 Lid 30 Rotation axis

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Office reference number FI technical display location G03B 21/10 Z

Claims (4)

[Claims] 1. A display device incorporated in a portable information device to display output information of the portable information device, and a projection device for enlarging and projecting the output information such as characters, figures, or images. A projection display device for a portable information device, comprising: a screen provided on the back side of the lid of the portable information device for displaying an image projected from the projection device. 2. The projection device is fixed at a predetermined angle with respect to the lid, and is housed in the main body of the portable information device when the lid is closed. Item 1. A projection type display device for portable information equipment according to item 1. 3. The projection device, a liquid crystal display element panel for displaying output information of the portable information device, a light source for illuminating the liquid crystal display element panel, and an image of the liquid crystal display panel illuminated by the light source. And an optical system for enlarging and projecting the image. The projection display device for portable information equipment according to claim 1 or 2, characterized in that: 4. The projection display device for portable information equipment according to claim 3, wherein the optical system includes a magnifying lens and a refracting lens.