JPH07175001A - Display device - Google Patents

Abstract

PURPOSE:To miniaturize a display device by proximately arranging laser light sources and shortening the length of an optical path between a laser beam generation system and a scanning system. CONSTITUTION:This is the display device displaying a video 51 by projecting the laser beam L emitted from the laser beam generation system 10 provided with the plural laser light sources 11 on one screen 51 through the scanning system 30 executing the scanning of the laser beam L. Then, reflecting mirror bodies 21 corresponding to the respective light sources 11 are provided on the optical path between the generation system 10 and the scanning system 30. Besides, the mirror bodies 21 are respectively provided with a reflecting direction adjustment mechanism adjusting the reflecting direction of the laser beam L.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device for displaying an image by irradiating a screen with a laser beam through a mirror.

[0002]

2. Description of the Related Art As a device for displaying an image by irradiating a screen with a laser beam through a mirror body, there is disclosed, for example, Japanese Patent Laid-Open No.
It is disclosed in Japanese Patent Publication No. 299383. Such a display device forms a large number of bright spots on a screen by projecting a laser beam emitted from a laser light source onto one screen through a scanning system that scans the laser beam, and It is possible to display a three-dimensional image by rotating the screen.

[0003]

In such a display device, the laser beam is guided to the screen through a large number of optical members, and the optical path of the laser beam from the laser beam generating system to the screen is long. It is very long, and the position of the bright spot on the screen irradiated by the laser light source largely changes due to a slight error in the mounting angle of the laser diode which is the laser light source. Therefore, in order to adjust the position of the bright spot on the screen, it is necessary to adjust the attitude of the laser diode, which is the laser light source, and the laser diodes must be arranged at intervals, and the laser beam generation system There is a problem in that the size of the display device is increased, and the distance between the laser beam generation system and the scanning mirror is increased, which increases the size of the entire display device.

[0004]

In order to solve the above problems, the present invention provides a laser beam emitted from a laser beam generating system having a plurality of laser light sources through a scanning system for scanning the laser beam. In a display device that displays an image by projecting onto a screen of one sheet, a reflecting mirror body corresponding to each of the laser light sources is provided in an optical path between the laser beam generating system and the scanning system, and each of the reflecting mirror bodies is provided. It has a reflection direction adjusting mechanism for adjusting the reflection direction of the laser beam.

[0005]

The laser light source can be arranged close to each other, and the length of the optical path between the laser beam generating system and the scanning system can be shortened, so that the display device can be downsized.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described based on the embodiments of the accompanying drawings.

FIG. 1 is a schematic configuration diagram of an essential part of an embodiment of the present invention. 10 is a laser beam in which a plurality of laser light sources, for example, red laser diodes 11 are arranged so as to correspond to the Y axis of a screen described later. This is a generation system, and the emission state of the laser beam L is controlled by a laser light source driving unit (not shown) having a preset program.

Reference numeral 20 denotes a reflection direction adjusting system which reflects a laser beam L emitted from the laser beam generating system 10 in the direction of a scanning system which will be described later. The reflection direction adjusting system 20 is a reflecting mirror corresponding to each laser diode 11. It has a body 21 and an adjusting mechanism described later.

Reference numeral 30 denotes a scanning mirror body 31 of galvano mirror type or polygon mirror type for reflecting the laser beam L toward the screen, and a laser beam L reflected by the scanning mirror body 31 for driving the scanning mirror body 31. Is a scanning system having a mirror body driving unit 32 for scanning the screen in the X-axis direction of the screen. .

Reference numeral 40 denotes a box 42 having an emission window 41 for irradiating the screen with a laser beam L, and a laser beam generation system 10
And a reflection direction adjusting system 20 and a scanning system 30.

Reference numeral 50 is a plane screen which has an XY plane and receives a laser beam L emitted from the projector 40 to display an image 51.

In such a display device, the laser beam L emitted from the laser beam generating system 10 is reflected in the scanning system 30 direction by the reflecting mirror body 21 of the reflection direction adjusting section system 20, and is reflected by the scanning mirror body 31. When it is scanned, it becomes a light beam corresponding to the XY plane, is irradiated on the screen 50, and creates a large number of bright spots.
It is possible to display a high brightness image.

FIG. 2 is a schematic configuration diagram of the reflection direction adjusting system 20, and the adjusting mechanism 22 of the reflection direction adjusting system 20 includes a reflecting mirror body 21.
The mounting member 23, the screw portion 24, the spring member 25, the support member 26, and the adjusting nut 27 are provided, and the box 42 has screws 43.
To the threaded portion 24 erected on the mounting member 23 mounted by
The spring member 25 and the supporting member 26 to which the reflecting mirror body 21 is attached are inserted, and the adjusting nut 27 is screwed. Support member
26 is sandwiched between the spring member 25 and the adjusting nut 27,
The reflecting mirror body 21 that is supported by the elastic force of 25 and is attached to the supporting member 26 can change its angle by adjusting the adjusting nut 27 of the adjusting mechanism 22, and is a laser diode that is minute and difficult to operate. Don't mess with 11.

As described above, the laser beam L emitted from each laser diode 11 of the laser beam generating system 10 is reflected by each reflecting mirror body 21 corresponding to each laser diode 11, but the reflecting mirror body 21 is The adjustment mechanism 22 can easily adjust the reflection direction of the laser beam L, and the irradiation position of the laser beam L emitted from the emission window 41 of the projector 40 on the screen 50 can be arbitrarily adjusted.

Further, the laser diodes 11 of the laser beam generating system 10 can be arranged in parallel from the radial arrangement so far, the distance (pitch) between the laser diodes 11 is reduced, and the laser beam generating system 10 is It can be miniaturized.

Moreover, the laser beam generating system 10 to the scanning system 30
Since the optical path of the laser beam L up to is refracted by the reflecting mirror body 21 of the reflection direction adjusting system 20, compared with the case where the optical path is set linearly (though the width dimension of the display device is slightly larger).
The depth dimension of the display device can be reduced, and the display device can be downsized as a whole.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the gist thereof. For example, it can be implemented in a three-dimensional display device using a laser beam shown in the conventional example, and by arranging the laser light sources in close proximity, it is possible to shorten the optical path lengths of the laser beam generation system and the scanning system. The three-dimensional display device can be downsized.

[0018]

According to the present invention, an image is displayed by projecting a laser beam emitted from a laser beam generating system having a plurality of laser light sources onto a single screen through a scanning system for scanning the laser beam. In the display device, a reflecting mirror body corresponding to each of the laser light sources is provided in the optical path between the laser beam generating system and the scanning system, and the reflecting mirror body adjusts the reflecting direction of the laser beam. Since it has an adjusting mechanism, the laser light source can be arranged in close proximity, and the length of the optical path between the laser beam generating system and the scanning system can be shortened, so that the display device can be downsized. .

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part of an embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of a reflection direction adjusting system of the above embodiment.

[Explanation of symbols]

 10 Laser beam generation system 11 Laser diode (laser light source) 21 Reflective mirror body 22 Reflection direction adjustment mechanism 30 Scanning system 50 Screen 51 Image L Laser beam

Claims (1)

[Claims] 1. A display device for displaying an image by projecting a laser beam emitted from a laser beam generating system having a plurality of laser light sources onto one screen through a scanning system for scanning the laser beam. A reflecting mirror body corresponding to each of the laser light sources is provided in an optical path between the laser beam generating system and the scanning system, and each reflecting mirror body has a reflection direction adjusting mechanism for adjusting a reflecting direction of the laser beam. A display device characterized by the above.