CN101294684A - Mechanical light modulation device - Google Patents
Mechanical light modulation device Download PDFInfo
- Publication number
- CN101294684A CN101294684A CN 200810112477 CN200810112477A CN101294684A CN 101294684 A CN101294684 A CN 101294684A CN 200810112477 CN200810112477 CN 200810112477 CN 200810112477 A CN200810112477 A CN 200810112477A CN 101294684 A CN101294684 A CN 101294684A
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- leading screw
- shadow shield
- source cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention is a dimmer used in a projector. A light source and a reflection bowl are arranged in a light source cover, a lens is arranged at the light outlet of the light source cover via a lens support, a lead screw is arranged on the lateral frontal of the light source cover, the lower end of the lead screw is connected with a motor, the lead screw is screwed with a nut, a guide sleeve is arranged above the nut, and a bracket is connected with the lead screw via the guide sleeve and is fastened by the nut; a grating light screen is arranged on the bracket, and can move upwards and downwards in front of the light outlet of the light source cover along with the rotation of the lead screw. The device solves the technical problem that the illuminating brightness of a large projector in the film and television industry can not be adjusted, light dimming of the projector can be achieved, the dimming process is stably and gradually changed, the illuminating brightness is changed smoothly, the dimming structure is simple, and the operation is convenient.
Description
Technical field
The present invention relates to a kind of light modulating device that shines light fixture, especially for the mechanical dimmer of projection magic lamp.
Background technology
When all kinds of large-scale performing active, projection magic lamp commonly used projects various scene patterns, increases performing effect.In the performance, the bright degree of scene needs to regulate at any time, just needs to become clear gradual change when It is getting dark, and excessively to by becoming at dusk night gradually, this just needs the light source of adjusting projection magic lamp, i.e. light modulation reduces lightness and could realize.In the projection magic lamp that uses at present, because the light source of projection magic lamp mostly is metal halide lamp, dysprosium lamp, indium lamp, their common feature is light efficiency height, colour temperature height, be to start by high-frequency and high-voltage, must there be the special-purpose equipment of lighting to come the very high projection magic lamp of starting resistor, and certain lighting the time will be arranged.After lamp was lighted, it was ineffective immediately to light equipment, wanted to light to restart again again.So want to realize the light modulation of projection magic lamp, change brightness of illumination, be that present projection magic lamp equipment is difficult to accomplish, therefore can't satisfy the actual needs of performance, this also is the technical problem of the very difficult solution of video display industry for many years.
Summary of the invention
The objective of the invention is to solve the problem that existing projection magic lamp brightness of illumination can't be regulated, a kind of mechanical dimmer that is arranged in the projection magic lamp is provided, beam size and output brightness by changing projection magic lamp realize the light modulation purpose.
The objective of the invention is to be achieved through the following technical solutions:
A kind of mechanical dimmer of projection magic lamp, in light source cover, be equiped with light source and reflector, lens scioptics support is installed on the light-emitting window of light source cover, leading screw is equipped with in side the place ahead of described light source cover, the lower end of this leading screw is connected with motor, screw moving up and down and guide pin bushing are housed on the leading screw, and a support is connected with leading screw by guide pin bushing and is fixed by screw; Be equiped with the grating shadow shield on the support, the grating shadow shield can move up and down before the light-emitting window of light source cover with the rotation of leading screw.
One side of described grating shadow shield is provided with projection; One side of support is equipped with the track corresponding with described lead screw position, and the slotted hole isometric with leading screw arranged on the track, and the bossing of grating shadow shield inserts the slotted hole of track.
Described grating shadow shield is a comb shape, wherein the broach of broach part by root to the tip size gradually by dwindling greatly, the gap is ascending gradually, broach length and broach arrangement width are greater than the light-emitting window diameter.
Light source among the present invention is installed in the light source cover, and light is penetrated by the light-emitting window of light source cover, and the comb shape grating shadow shield that is driven by machinery moves before light-emitting window, regulates the brightness that light-emitting window penetrates.When penetrating light need be by bright deepening gradually the time, machinery drives comb shape grating shadow shield and moves down, and blocks light-emitting window by the broach tip gradually to root; Penetrating light need be when secretly brightening gradually, and machinery drives comb shape grating shadow shield and oppositely moves.Because the grating shadow shield is a comb shape, broach by root to the tip size gradually by dwindling greatly, the gap is ascending gradually, broach length and broach are arranged width greater than the light exit diameter, therefore move when blocking light-emitting window brightness of illumination can by bright change to gradually dark, or bright by secretly changing to gradually.Require removable slit shadow shield partial occlusion light-emitting window until blocking light-emitting window fully according to brightness.
The invention has the beneficial effects as follows: solve the uncontrollable technical problem of the medium-and-large-sized projection magic lamp brightness of illumination of video display industry, realized the light modulation of projection magic lamp, the steady gradual change of light modulation process, the illumination variation effect is mild, and light modulation structure is simple, is convenient to operation.
Description of drawings
Below in conjunction with embodiment and accompanying drawing thereof the present invention is further described.
Fig. 1 is the overall structure schematic diagram of light modulating device of the present invention.
Fig. 2 is the right view of Fig. 1.
Fig. 3 is the vertical view of Fig. 1.
Fig. 4 is the structural representation of grating shadow shield.
Number among the figure: 1. support, 2. grating shadow shield, 3. track, 4. light source, 5. lamp angle, 6. insulating trip, 7. lens, 8. light source cover, 9. electric machine support, 10. motor, 11. leading screws, 12. screws, 13. guide pin bushings, 14. lens carriers, 15. reflectors.
The specific embodiment
As Figure 1-3, square light source cover 8 among the present invention is made for aluminium shape material, lamp angle 5 and insulating trip 6 are fixed in the left and right sides of square light source cover 8, light source 4 is contained on the lamp angle 5, light source 4 front and back are equipped with lens 14 and reflector 15 respectively, light source 4 is lighted, and scioptics 7, reflector 15 reflex on the rear projection screen.Electric machine support 9 is fixed in outside the lower-left of light source cover 8 with motor 10 usefulness screws, leading screw 11 is installed on the machine shaft, screw 12 moving up and down and guide pin bushing 13 are housed on the leading screw, one support 1 is connected with leading screw 11 by guide pin bushing, its connected mode is, support 1 is provided with perforation, and the guide pin bushing 13 on the leading screw embeds in the support perforation and by screw to be fixed.Guide pin bushing 13 plays the role of positioning, and support 1 is steadily moved up and down along leading screw 11.
Be screwed on the support 1 grating shadow shield 2 is housed, when leading screw rotated, grating shadow shield 2 can move up and down before the light-emitting window of light source cover with support 1.In the present embodiment, a side of grating shadow shield 2 is provided with projection; One side of support 1 is equipped with the track 3 corresponding with leading screw 11 positions, and the slotted hole isometric with leading screw arranged on the track 3, and the bossing of grating shadow shield 2 inserts location in the slotted hole of track 3, guarantee the grating shadow shield parallel when mobile steadily.
The grating shadow shield of present embodiment is comb shape (as Fig. 1, shown in Figure 4), the broach of its broach part by root to the tip size gradually by dwindling greatly, the gap is ascending gradually, broach length and broach arrangement width are greater than the light-emitting window diameter.
When in projection magic lamp, using this mechanical dimmer, when background illumination brightness need change, motor 10 is started by control signal control, drive leading screw 11 thereupon and rotate, screw moves on leading screw, and support 1 moves on leading screw thereupon, the grating shadow shield 2 that drives on the support moves up and down before light-emitting window reposefully, because the grating shadow shield has the broach of gap gradual change up and down, when the grating shadow shield moves through light-emitting window, can realize the light modulation of projection magic lamp.When penetrating light need be by bright deepening gradually the time, the grating shadow shield moves down, and blocks light-emitting window by the broach tip gradually to root, until sheltering from light-emitting window fully; Need be when secretly brightening gradually when penetrating light, motor 10 drives the leading screw backward rotation, drives the grating shadow shield and moves up, and the brightness of illumination of light-emitting window is bright by secretly changing to gradually.
Claims (3)
1. mechanical dimmer, in light source cover (8), be equiped with light source (4) and reflector (15), lens (7) scioptics supports (14) are installed on the light-emitting window of light source cover, it is characterized in that: leading screw (11) is equipped with in side the place ahead of described light source cover, the lower end of this leading screw is connected with motor (10), be bolted with screw (12) on the leading screw, guide pin bushing (13) is equipped with in the screw top, and a support (1) is connected with leading screw (11) by guide pin bushing and is fixing by screw (12); Be equiped with grating shadow shield (2) on the support (1), this grating shadow shield can move up and down before the light-emitting window of light source cover with the rotation of leading screw.
2. a kind of mechanical dimmer according to claim 1 is characterized in that: a side of described grating shadow shield (2) is provided with projection; One side of support (1) is equipped with the track (3) corresponding with described leading screw (11) position, and track has the slotted hole isometric with leading screw on (3), and the bossing of grating shadow shield (2) inserts the slotted hole of track.
3. a kind of mechanical dimmer according to claim 1 and 2, it is characterized in that: described grating shadow shield (2) is a comb shape, wherein the broach of broach part by root to the tip size gradually by dwindling greatly, the gap is ascending gradually, broach length and broach arrangement width are greater than the light-emitting window diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810112477 CN101294684A (en) | 2008-05-23 | 2008-05-23 | Mechanical light modulation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810112477 CN101294684A (en) | 2008-05-23 | 2008-05-23 | Mechanical light modulation device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101294684A true CN101294684A (en) | 2008-10-29 |
Family
ID=40065126
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200810112477 Pending CN101294684A (en) | 2008-05-23 | 2008-05-23 | Mechanical light modulation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101294684A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297390A (en) * | 2011-07-01 | 2011-12-28 | 广州彩熠灯光有限公司 | Mechanical dimming system for stage light |
| CN105250037A (en) * | 2015-09-16 | 2016-01-20 | 上海波鸿医疗器械科技有限公司 | Cold light source lighting device |
-
2008
- 2008-05-23 CN CN 200810112477 patent/CN101294684A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297390A (en) * | 2011-07-01 | 2011-12-28 | 广州彩熠灯光有限公司 | Mechanical dimming system for stage light |
| CN105250037A (en) * | 2015-09-16 | 2016-01-20 | 上海波鸿医疗器械科技有限公司 | Cold light source lighting device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN202109328U (en) | LED projection lamp with adjustable spotlight range | |
| CN114909611A (en) | LED lamp tube with adjustable high-definition eye protection brightness | |
| CN204943249U (en) | A kind of light guide glow device of LED daytime running lamps recombination site lamp | |
| CN101294684A (en) | Mechanical light modulation device | |
| CN202972691U (en) | High-power light-emitting diode (LED) thread projector lamp | |
| CN202992804U (en) | Spotlight | |
| WO2010006614A1 (en) | Adjustable lamp | |
| CN218544260U (en) | Automatic LED illumination intensity adjusting device | |
| CN214306822U (en) | Lamp for coal mine | |
| CN107917376B (en) | Platform street lamp with movable protection device | |
| KR101782069B1 (en) | LED street light | |
| CN212456447U (en) | Linear color-mixing and focusing LED panning surface light lamp | |
| CN107246556A (en) | A kind of intelligent stage lighting of Mobyneb | |
| CN209762823U (en) | Quick focusing lens for stage lighting | |
| CN207364896U (en) | A kind of outdoor lights | |
| CN2645105Y (en) | Stage back cloth projection magic lantern | |
| CN207246850U (en) | A kind of intelligent stage lighting of Mobyneb | |
| CN220551831U (en) | Light projector capable of adjusting light beam diffusion angle | |
| CN217464189U (en) | Projection lamp | |
| CN211403087U (en) | Projection lamp focusing mechanism and projection lamp | |
| CN213840616U (en) | LED spotlight capable of intelligently adjusting light | |
| CN215489528U (en) | High-power electric focusing down lamp | |
| CN220647998U (en) | Motorcycle turn signal lamp | |
| CN218846010U (en) | Intelligent LED lighting lamp | |
| CN215982405U (en) | Intelligent LED street lamp for urban illumination |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20081029 |