CN2301819Y

CN2301819Y - Laser video projector

Info

Publication number: CN2301819Y
Application number: CN 97239917
Authority: CN
Inventors: 张雷
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-07-29
Filing date: 1997-07-29
Publication date: 1998-12-23
Anticipated expiration: 2007-07-29

Abstract

The utility model discloses a laser video projector. The utility model is composed of three groups of laser generators 6, an acoustic-optic modulator 1, a light reflecting edge drum 2 with high rotary speed and a light reflecting edge drum 3 with low rotary speed. The three groups of laser generators 6 can respectively generate red light, green light and blue light. The acoustic-optic modulator 1, the light reflecting edge drum 2 with high rotary speed and the light reflecting edge drum 3 with low rotary speed are corresponding to the laser generators. After modulating light 10 is modulated by the acoustic-optic modulator, the modulating light 10 is converted to the scanning mode of horizontal frequency and field frequency by using the two light reflecting edge drums 3, and the scanning mode of horizontal frequency and field frequency is similar to a display screen of a television; thereby, an image signal can be projected to an oversize display screen, building surface, mountain slope, city wall and other objects. The utility model has the advantages that the utility model is not limited by the display screen, the cost is low, the colour is showy, the long distance can be viewed, etc. The utility model is suitable for an oversize background object to show a chromatic cartoon image.

Description

The laser video projecting apparatus

The utility model relates to a kind of energy will carry out the projecting apparatus of large-area scanning through the laser signal after the modulation, belong to the photoelectron technology field.

The photoelectron technology that adopts at present domestic large scale business or the public service ads is nothing but such as video wall, LED light-emitting diode large-screen, magnetic upset large-screen and several display modes of screen projector, but these several display modes cut both ways.For example, video wall is to be spliced with a plurality of television sets, and color is perfect but its brightness is even inadequately, and cost is also lower, is fit to indoor and outdoor demonstration video signal; LED light-emitting diode large-screen is to adopt light emitting diode matrix circulation demonstration successively line by line, its brightness height, screen size is changeable, but it can only show the computer graphical signal, gradation is relatively poor, and need the thousands of light-emitting diode of hundreds of thousands even to arrange, cost is quite expensive, and maintenance is difficulty very.After damaging, some or several light-emitting diodes will make shown image defective occur and influence whole structure; Magnetic upset large-screen is to be made of tens0000 little look boards and tens0000 electrical micro-machine arrays correspondingly, and its color is more gorgeous, but visual range is shorter, can only show still frame, and cost is quite high, and only Mei Nian maintenance cost is just very surprising; And screen projector also will rely on the white reflection screen owing to be subject to ambient light, so can not use in open-air place by day, more can not carry out the large tracts of land projection.All this kind, above-mentioned several Display Technique is all not satisfactory, in advertisement career flourish today, also will be according to domestic actual requirement and economic situation, an urgent demand is a kind of possess skills simultaneously simple, cost is low, display image is effective, and the Display Technique and the equipment that not influenced by environment, light, place, screen etc.

The purpose of this utility model will overcome the deficiency described in the background technology exactly, and a kind of simple in structure, technical feasibility, cost is low, display effect is good laser video projecting apparatus are provided.

The purpose of this utility model realizes by following technical solution: the acousto-optic modulator that this laser video projecting apparatus has one group of red, green, blue laser generator and can modulate the laser beam that laser generator produces, be equipped with the high rotating speed reflection edge drum and the corresponding with it slow-speed of revolution reflection edge drum that light modulated can be reflexed on the projected objects in light path the place ahead of each acousto-optic modulator, also have a diaphragm between acousto-optic modulator and the high rotating speed reflection edge drum.In the described high rotating speed reflection edge drum is the gyroscope motor, and slow-speed of revolution reflection edge drum is driven by disc type electric machine.The unwanted light that acousto-optic modulator sends is blocked by diaphragm.

Accompanying drawing is wherein one group a structural representation (all the other two groups identical with it) of the utility model.

Now in conjunction with the accompanying drawings the utility model being done one describes in detail.

As shown in drawings, have three in this projecting apparatus and can send the monochromatic laser generator 6 of red, green, blue respectively, the place ahead at each laser beam of being got by laser generator 69 is equipped with an acousto-optic modulator 1, and light path the place ahead of each acousto-optic modulator 1 is equipped with diaphragm 5, high rotating speed reflection edge drum 2 and slow-speed of revolution reflection edge drum 3.Its (350 revolutions per seconds) rotation at a high speed of gyroscope driven by motor is arranged in the wherein high rotating speed reflection edge drum 2, and slow-speed of revolution reflection edge drum 3 drives by three-phase brushless disc type electric machine 4 and rotates with the speed that per second 2.5 changes.On two reflection edge drums 2,3, respectively be provided with 20 reflective surfaces 8,18 ° each other of the angles between per two reflective surfaces 8.Each acousto-optic modulator 1, high rotating speed reflection edge drum 2 all are connected with computer interface 11 with slow-speed of revolution reflection edge drum 3, by computer realization to its control of moving separately.

The course of work of this projecting apparatus is such: modulated by acousto-optic modulator 1 by the laser beam 9 that laser generator 6 is got, the light modulated 10 after modulation incides on the reflective surface 8 that horizontally rotates high rotating speed reflection edge drum 2.Because the gyroscope motor of high rotating speed reflection edge drum 2 drives reflection edge drum 2 high speed rotating with 20 reflective surfaces 8 with the speed that per second 350 changes, make light modulated 10 incide the horizontal sweep that laser beam on the high rotating speed reflection edge drum 2 produces per second 7000 times.Disc type electric machine 4 drives the slow-speed of revolution reflection edge drum 3 with 20 reflective surfaces 8 again and rotates with the speed that per second 2.5 changes, just be equivalent to the horizontal light beam scanning of 7000HZ is distributed in the vertical scan field of 50HZ, form the line scanning and the field scan form of a similar television screen, its line frequency is 7000HZ, field frequency is 50HZ, cooperation is to the modulation of incoming laser beam 9, thus can be with animation color video frequency image projection imaging at the object that is projected as on significantly screen, high-lager building surface, the hillside at night or on the aerial objects such as smoke screen.

The switch motion of acousto-optic modulator 1 is controlled by computer, and when opening, light modulated 10 incides on the high rotating speed reflection edge drum 2; 7 of unwanted lights that is produced when closing are blocked by diaphragm 5.

Design design of the present utility model is unique, and structural configuration is ingenious, and laser technology is applied to big picture imaging On, solved the many deficiencies that exist in the background technology, for further increase projected area, reduce equipment cost, Improving image displaying quality opens up a new way. It has brightness height, unrestricted, the nothing of projected area The advantages such as screen request, visual range are far away, beautiful in colour are applicable to that demonstration is color on the outdoor oversize background objects The look animated image.

Claims

1, a kind of laser video projecting apparatus, it is characterized in that the acousto-optic modulator (1) that it has one group of red, green, blue laser generator (6) and can modulate the laser beam (9) that laser generator (6) produces, be equipped with the high rotating speed reflection edge drum (2) and the corresponding with it slow-speed of revolution reflection edge drum (3) that light modulated (10) can be reflexed on the projected objects in light path the place ahead of each acousto-optic modulator (1), also have a diaphragm (5) between acousto-optic modulator (1) and the high rotating speed reflection edge drum (2).

2, laser video projecting apparatus as claimed in claim 1 is characterized in that being the gyroscope motor in the described high rotating speed reflection edge drum (2) that slow-speed of revolution reflection edge drum (3) is driven by disc type electric machine (4).

3, laser video projecting apparatus as claimed in claim 1 is characterized in that the unwanted light (7) that is sent by acousto-optic modulator (1) is blocked by diaphragm (5).

4, laser video projecting apparatus as claimed in claim 1 is characterized in that high rotating speed reflection edge drum (2) and slow-speed of revolution reflection edge drum (3) respectively has 15-45 reflective surface (8), and the rotating shaft of the two is orthogonal.