CN2500051Y

CN2500051Y - Large screen projection display device

Info

Publication number: CN2500051Y
Application number: CN 01233788
Authority: CN
Inventors: 孟超; 曹长风
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-08-07
Filing date: 2001-08-07
Publication date: 2002-07-10
Anticipated expiration: 2011-08-07

Abstract

The utility model discloses a large-screen projection display device, comprising a television signal input end, an imaging region, a control device, a controllable light source device and a deflection unit. The control device is connected with the television signal input end, and connected with the control end of the controllable light source device and the deflection unit; the light beam emitted by the light source device passes through the deflection unit and then illuminates the imaging region. The utility model can realize high brightness and low production cost. The imaging region can be realized by using a screen or not.

Description

The large screen projection display unit

Technical field:

The utility model relates to a kind of large screen projection display unit.

Background technology:

Present outdoor version large-screen tv wall, pixel is few, and is unintelligible.The definition of the video wall of being made up of the LED luminescent device is less than 50,000 pixels, invests highly, and maintenance inconvenience, as tower in the video wall cost 5,000,000 in the strong North Road of Shenzhen China is exactly an example.General indoor household projection TV set (comprising back projection type) price is more than 20,000.Ubiquitous problem is that brightness is low, has only the 800-2000 lumen, and viewing angle is little, and the screen breadth is little, during general less than 60.The technology that realizes simple graph with multiple laser in the night sky exists, and in large-scale parks such as the local culture village in Shenzhen, Window on the World demonstration is arranged all, and still, can forming clearly, the equipment of moving image occurs so far.

Summary of the invention:

The purpose of this utility model is exactly in order to overcome the above problems, and a kind of large screen projection display unit is provided, and the large-screen imaging can be realized, even screen imaging can be accomplished need not, the brightness height, cost is low.

The utility model realizes that the scheme of above-mentioned purpose is: a kind of large screen projection display unit, comprise tv signal input and imaging region, it is characterized in that: also have control device, controllable light source device 10 and deflection unit, described control device links to each other with tv signal input, and is connected in the control end of controllable light source device 10 and deflection unit; The light that light supply apparatus 10 sends shines in imaging region behind deflection unit.

Adopt the beneficial effect of above scheme: owing to be to use the light source direct imaging, need not picture reproducers such as picture tube, liquid crystal, plasma, the brightness of image only is subject to the intensity of light source, and the intensity of light source can strengthen by adopting ways such as laser, increase power, thereby can accomplish high brightness; Owing to have only simple light path and circuit, thereby cost is low.Imaging area can be used screen, also can.When using screen, can not only improve the definition of chromatic image, and can improve brightness greatly, no electromagenetic wave radiation, with low cost.Just need not screen at night, as long as reflective thing or scattering thing are arranged, can form image in imaging region, as water curtain imaging, imaging etc. in smog.

Description of drawings:

Fig. 1 is the utility model schematic diagram.

Fig. 2 is the utility model embodiment schematic diagram.

Fig. 3 is a barrel-shaped object deflection unit schematic diagram among the utility model embodiment.

Embodiment:

Also in conjunction with the accompanying drawings the utility model is described in further detail below by specific embodiment.

Embodiment one: see Fig. 1, shown in the large screen projection display unit comprise tv signal input (not shown) and imaging region 8, and control device (not shown), controllable light source device 10 and deflection unit 7, described control device links to each other with tv signal input, and is connected in the control end of controllable light source device 10 and deflection unit 7; The light that light supply apparatus 10 sends shines in imaging region 8 behind deflection unit 7.

Wherein, described controllable light source device 10 can have multiple implementation, as: 1) with at least three lasers that glow color is different, as red, green, Lan Sanse, input current with TV signal controlling laser, the emission/close of control laser, so on the control imaging region 8 luminous point have or not or bright dark.2) still use three look lasers, but increase smooth hurdle to be opened/closed in the laser back, with the switching on TV signal controlling light hurdle, also on the may command imaging region 8 luminous point have or not or bright dark; 3) as shown in Figure 2,, on its light path, place narrow slit 3, dispersion element 4, optical switch group 5, convergent lens 6 successively, tell red, green, Lan Sanse by dispersion element 4 with at least one white light source 1.If white and black displays, can be without beam split.

Wherein deflection unit 7 also can have multiple implementation, as: 1) with at least two light galvanometers, have on the described smooth galvanometer one can be by the reflecting optics of pumping signal rule deflection, described eyeglass is arranged on the light path, two eyeglasses are vertically worked mutually simultaneously, and reverberation is scanned at imaging region 8 places.2) as Fig. 3, with at least two barrel-shaped objects, be evenly distributed with a plurality of bar shaped speculums on the described barrel-shaped object cylinder, the reflection angle of each speculum is descending successively or ascending, barrel-shaped object can rotate by the pumping signal rule, drive the speculum on it, each mirror wheel is flow to reach light path, thereby light point reflection is arrived different angles; Two barrel-shaped objects are vertically worked mutually simultaneously, and reverberation is scanned at imaging region 8 places.

In Fig. 2: the 1st, light source, the 2nd, light beam, the 3rd, narrow slit, the 4th, prism that chromatic dispersion is used or grating, the 5th, optical switch group, the 6th, convergent lens, the 7th, deflection unit, the 8th, the zone or the curtain of formation image.Send the white mixed light that comprises RGB by light source 1, with the convergence reflex mirror light is converged on a prism or the grating 4 by a narrow slit, this Shu Baiguang is broken down into a band spectrum that comprises three kinds of colors of RGB, with cylindrical lens 6 along continuous straight runs scatter the light that comes again along continuous straight runs assemble, because lay a switch group 5 that comprises three switches (abbreviating R, G, B respectively as) from prism at light to the way of assembling the unit, whether these three switches can be controlled respectively allows three kinds of colors of RGB pass through.When these three switches were all opened, redgreenblue light can pass through them respectively, through deflection unit 7 deflection scannings, so just occurred spectrum---the white point of these three kinds of colors simultaneously in screen 8 positions; R closes when switch, switch G, when B opens, and ruddiness just can not pass through switch R, then at this time on screen, just lacked ruddiness, and secondary colour---the blue or green color of only remaining green and blue addition.The effect of other two switches also similarly, its state table can be referring to table 1.Signal demodulation unit is according to television image signal control optical switch group 5, the color of light that selection can be passed through, through the convergence unit 6 synthetic color beam that need, and be presented on the curtain 8, the light beam of these different colours scans fast through scanning element 7, form the luminous point (pixel) of different colours in the screen relevant position, constitute coloured image.

Table one:

Red filter R	Green filter G	Blue filter B	Kind by color	Color on the screen point
Red filter R	Green filter G	Blue filter B	Kind by color	Color on the screen point	0/ opens	0/ opens	0/ opens	Have three kinds of colors	White
0/ opens	1/ closes	1/ closes	Only have red color	Red	0/ opens	0/ opens	0/ opens	Have three kinds of colors	White
0/ opens	1/ closes	1/ closes	Only have red color	Red	0/ opens	0/ opens	1/ closes	Have red green two color	Yellow
0/ opens	1/ closes	0/ opens	Have red blue dichromatism	Purple	0/ opens	0/ opens	1/ closes	Have red green two color	Yellow
0/ opens	1/ closes	0/ opens	Have red blue dichromatism	Purple	1/ closes	0/ opens	1/ closes	Only have green color	Green
1/ closes	0/ opens	0/ opens	Have turquoise dichromatism	Cyan	1/ closes	0/ opens	1/ closes	Only have green color	Green
1/ closes	0/ opens	0/ opens	Have turquoise dichromatism	Cyan	1/ closes	1/ closes	0/ opens	Only have blue color	Blue
1/ closes	1/ closes	1/ closes	Three kinds of colors all do not have	Black	1/ closes	1/ closes	0/ opens	Only have blue color	Blue

As above state, light source 1 can adopt continuously or the pulse white light source; Light source 1 also can substitute white light source by three light sources of RGB, and can save chromatic dispersion unit 3,4; The brightness of luminous point can be tuning by the penetrating rate of light beams such as, red, green, blue white to the control of light source or control; The color saturation of luminous point can be mixed tuning with former luminous point by the beam of white light of synchronous controllable brightness in proportion.

The intensity of control laser also has a lot of methods, as 1) can utilize ready-made technology---the optical switch in the optical-fibre communications, control its intensity to adapt to TV signal; 2) directly control the current density of lasing light emitter, control its intensity with modulation degree.

The utility model is compared the advantage of institute's tool and effect such as following table 2 with the product that prior art forms:

Table two:

	Brightness	Definition	Price	Efficient	Screen size	Viewing angle	Safety	Mobility
	Brightness	Definition	Price	Efficient	Screen size	Viewing angle	Safety	Mobility	Outdoor LED large-screen colour TV wall	Generally	Difference	5,000,000	20％	200 o'clock	Generally	Be	Can not move
Family expenses projection color tv set	Difference	Generally	2-5 ten thousand	50％	60 o'clock	Generally	Be	Can move	Outdoor LED large-screen colour TV wall	Generally	Difference	5,000,000	20％	200 o'clock	Generally	Be	Can not move
Family expenses projection color tv set	Difference	Generally	2-5 ten thousand	50％	60 o'clock	Generally	Be	Can move	Family expenses back projection type color television set	Difference	Generally	2-5 ten thousand	40％	50 o'clock	Narrow	Be	Inconvenience is moved
The normal domestic use color television set	Well	Well	3000 yuan	90％	During 29-33	Generally	Difference	Can move	Family expenses back projection type color television set	Difference	Generally	2-5 ten thousand	40％	50 o'clock	Narrow	Be	Inconvenience is moved
The normal domestic use color television set	Well	Well	3000 yuan	90％	During 29-33	Generally	Difference	Can move	Outdoor color laser large screen projector	Well	Well	50,000	90％	600 o'clock	Generally	Be	Can move
Indoor color laser projector	Well	Well	3000 yuan	90％	200 o'clock	Generally	Be	Can move	Outdoor color laser large screen projector	Well	Well	50,000	90％	600 o'clock	Generally	Be	Can move
Indoor color laser projector	Well	Well	3000 yuan	90％	200 o'clock	Generally	Be	Can move	The utility model	Well	Well	50,000	90％	600 o'clock	Well	Be	Can move

The utility model can be used for: outdoor large-sized solor laser projection tv wall advertisement screen, family expenses large-sized solor laser projection tv wall, outdoor no screen color laser projection hologram television machine etc.

In sum, the utility model is formed luminous point by a branch of to multi beam laser, by the scanning servo system.In 200 meters, need not focus on, during demonstration, high voltage installations such as picture tube be arranged unlike picture tube,, avoid the harm of picture tube the mankind so can not produce electromagnetic radiation; Do not exist as picture tube the signal of telecommunication to be converted into the restriction of light signal through fluorescent material yet, so the precision that can accomplish standard television and high definition TV.Do light source owing to adopt high brightness and high purity laser.If make outdoor TV wall advertisement screen, not only can promote clearness greatly, also can improve brightness greatly.

Claims

1. large screen projection display unit, comprise tv signal input and imaging region (8), it is characterized in that: also have control device, controllable light source device (10) and deflection unit (7), described control device links to each other with tv signal input, and is connected in the control end of controllable light source device (10) and deflection unit (7); The light that light supply apparatus (10) sends shines in imaging region (8) behind deflection unit (7).

2. large screen projection display unit as claimed in claim 1, it is characterized in that: described controllable light source device (10) comprises at least three lasers that glow color is different, input current with TV signal controlling laser, be the emission/close of may command laser, and then control imaging region (8) is gone up having or not of luminous point or bright dark; Perhaps increase smooth hurdle to be opened/closed,, can control imaging region (8) and go up having or not of luminous point or bright dark with the switching on TV signal controlling light hurdle in the laser back.

3. large screen projection display unit as claimed in claim 1, it is characterized in that: described controllable light source device (10) comprises at least one white light source (1), places narrow slit (3), dispersion element (4), optical switch group (5), convergent lens (6) on its light path successively.

4. as claim 1 or 2 or 3 described large screen projection display unit, it is characterized in that: described deflection unit (7) comprises at least two light galvanometers, have on the described smooth galvanometer one can be by the reflecting optics of pumping signal rule deflection, described eyeglass is arranged on the light path, two eyeglasses are vertically worked mutually simultaneously, make reverberation locate scanning at imaging region (8).

5. as claim 1 or 2 or 3 described large screen projection display unit, it is characterized in that: described deflection unit (7) comprises at least two barrel-shaped objects, be evenly distributed with a plurality of bar shaped speculums on the described barrel-shaped object cylinder, the reflection angle of each speculum is descending successively or ascending, barrel-shaped object can rotate by the pumping signal rule, drive the speculum on it, each mirror wheel is flow to reach light path, thereby light point reflection is arrived different angles; Two barrel-shaped objects are vertically worked mutually simultaneously, make reverberation locate scanning at imaging region (8).