CN101211094A - Portable single color LCD projector using LED illuminating source - Google Patents
Portable single color LCD projector using LED illuminating source Download PDFInfo
- Publication number
- CN101211094A CN101211094A CNA2007101448848A CN200710144884A CN101211094A CN 101211094 A CN101211094 A CN 101211094A CN A2007101448848 A CNA2007101448848 A CN A2007101448848A CN 200710144884 A CN200710144884 A CN 200710144884A CN 101211094 A CN101211094 A CN 101211094A
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- Prior art keywords
- liquid crystal
- collector lens
- crystal panel
- lens
- polarizer
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Abstract
The invention provides a portable single-color liquid crystal projector which uses a LED light source. The projector comprises a highlight luminous LED, a front collector lens, a back collector lens, a liquid crystal panel and a projection lens; wherein, the highlight luminous LED is arranged in front of the front collector lens, the front part and the back part of the liquid crystal panel are provided with a front polarizer and a back polarizer, the back collector lens is arranged in front of the front polarizer, the back polarizer is arranged in front of the projection lens, the liquid crystal panel is connected with a drive circuit board via one output line of VGA three-line signal, and the drive circuit board is connected with a VGA port of a micro-computer. The invention omits light splitting and light combining devices of a traditional color liquid crystal projector, and has the advantages of small size, light weight, quick startup, less heat emission, continuous long-time work, low cost, etc., thereby being particularly suitable for the field of micro-measurement which needs generate real-time interference fringe images.
Description
(1) technical field
The present invention relates to the crystal projection machine technology, be specifically related to a kind of single color LCD projector that uses LED as light source.
(2) background technology
Traditional color liquid crystal projector luminophor volume is big, the thermal value height, and it is limited to continue service time, and start-up time is long; RGB three road signals in the VGA signal of general employing microcomputer need light-dividing device to tell the light of three kinds of colors of red, green, blue, throw into respectively then on 3 liquid crystal panel, mix again, throw away by projecting lens, so the light path complexity.Some special fields (as the micrometering amount) require monochromatic, projector start-up time short, continuous working period is long, volume is little, thermal value is low, maximum reduces cost.
(3) summary of the invention
The object of the present invention is to provide a kind of heating few, noise is low, monochrome, and start-up time is short, and structure is simplified, and volume significantly reduces, and low cost can be handed the portable single color LCD projector of the use led light source of use.
The object of the present invention is achieved like this: it comprises highlighted emitting led diode 2, preceding collector lens 3, back collector lens 4, liquid crystal panel 6 and projection lens 8, highlighted emitting led diode 2 is arranged on the heat sink 10, setting is installed in before the preceding collector lens 3, before preceding collector lens 3 is arranged on back collector lens 4, polaroid 5 and rear polarizer 7 before the front and back of liquid crystal panel 6 are provided with, before back collector lens 4 is arranged on preceding polaroid 5, before rear polarizer 7 is arranged on projection lens 8, liquid crystal panel 6 connects drive circuit board 13 by a road of VGA three road signals output, and drive circuit board 13 connects the VGA interface of microcomputer 11.
The present invention uses a highlighted emitting led diode as light source, and input end connects the VGA interface of microcomputer, and light source sees through liquid crystal panel, carries out projection in the mode of transmission, makes projector's heating few, and noise is low, and start-up time is short.On light path, behind the collector lens converging ray, parallel projection to one piece has on the liquid crystal panel of forward and backward polaroid, the light transmission panel, directly throw into body surface, saved beam split, the Multiplexing apparatus of traditional liquid crystal projector, with three tunnel traditional beam split, close light formula light path and be reduced to one the tunnel by projecting lens, make that projector architecture is simplified, volume significantly reduces, can hand use.Projector of the present invention has carried out verification experimental verification in some real-time micrometering amount system, reached predetermined effect.
Liquid crystal panel of the present invention drives by the drive circuit board of simplifying, drive circuit board is connected on the VGA interface of microcomputer, carry out conversion of signals and control through drive circuit board, with the VGA conversion of signals is the drive signal of liquid crystal panel, but only utilize in the VGA signal red, green, a road of blue three road signals output is used for driving the monolithic liquid crystal panel, produce monochromatic projected image, other two-way do not use, and traditional liquid crystal projector need use three liquid crystal panels, the present invention only uses a liquid crystal panel as the converter of electric signal to light signal, can significantly reduce the former device number of driving circuit like this, and start-up time is fast.Projection light source is the highlighted light emitting diode LED of a white, this light source does not have the preheating time of conventional light source, start fast, on the liquid crystal panel of the light that highlighted LED sends through projecting to the band polaroid behind the collector lens optically focused, the light that transmission is gone out directly projects body surface through lens.
Beneficial effect of the present invention has: monochromatic, light path is simple, start-up time is fast, thermal value is few, can continue use, little, in light weight, the hand-holdable use of volume for a long time, and is cheap, finishes the projection of gray level image in simple mode.
(4) description of drawings
Fig. 1 is the structure principle chart of projector of the present invention;
Fig. 2 is the structure principle chart that microcomputer is connected with projector.
(5) embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments:
In conjunction with Fig. 1, present embodiment comprises highlighted emitting led diode 2, preceding collector lens 3, back collector lens 4, liquid crystal panel 6, with projection lens 8, highlighted emitting led diode 2 is arranged on the heat sink 10, setting is installed in before the preceding collector lens 3, before preceding collector lens 3 is arranged on back collector lens 4, polaroid 5 and rear polarizer 7 before the front and back of liquid crystal panel 6 are provided with, before back collector lens 4 is arranged on preceding polaroid 5, before rear polarizer 7 is arranged on projection lens 8, liquid crystal panel 6 connects drive circuit board 13 by a road of VGA three road signals output, and drive circuit board 13 connects the VGA interface of microcomputer 11.
Highlighted emitting led diode 2 is welded to and realizes heat radiation on the heat sink 10 in the present embodiment, in order to pursue the effect of better heat radiation, can add a small fan on highlighted emitting led diode 2 next doors according to the actual requirements.The light that highlighted emitting led diode 2 sends is through preceding collector lens 3, the effect of converging of back collector lens 4 projects on the preceding polaroid 5 light transmission liquid crystal panel 6, project on the rear polarizer 7 by the light after the liquid crystal panel modulation, enter projection lens 8 then and directly project body surface.Highlighted emitting led diode 2 can be selected according to the brightness requirement of reality.Liquid crystal panel 6 connects drive circuit board.
In conjunction with Fig. 2, liquid crystal panel drive plate 13 is connected to microcomputer 11 by the VGA interface, and the VGA vision signal has three road signal R, G, B, and this panel only need utilize wherein and one the road drive the liquid crystal panel 13 that connects driving, so compare with traditional driving circuit, number of chips significantly reduces.Liquid crystal panel drive plate 13 is sent into drive signal in the liquid crystal panel, is used for the modulation of projector.
Claims (1)
1. portable single color LCD projector that uses led light source, it comprises preceding collector lens (3), back collector lens (4), liquid crystal panel (6) and projection lens (8), it is characterized in that it also comprises highlighted emitting led utmost point pipe (2), highlighted emitting led utmost point pipe (2) is arranged on the heat sink (10), setting is installed in preceding collector lens (3) before, it is preceding that preceding collector lens (3) is arranged on back collector lens (4), the front and back of liquid crystal panel (6) are provided with preceding polaroid (5) and rear polarizer (7), it is preceding that back collector lens (4) is arranged on preceding polaroid (5), it is preceding that rear polarizer (7) is arranged on projection lens (8), liquid crystal panel (6) connects drive circuit board (13) by a road of VGA three road signals output, and drive circuit board (13) connects the VGA interface of microcomputer (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101448848A CN101211094A (en) | 2007-12-21 | 2007-12-21 | Portable single color LCD projector using LED illuminating source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101448848A CN101211094A (en) | 2007-12-21 | 2007-12-21 | Portable single color LCD projector using LED illuminating source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101211094A true CN101211094A (en) | 2008-07-02 |
Family
ID=39611212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101448848A Pending CN101211094A (en) | 2007-12-21 | 2007-12-21 | Portable single color LCD projector using LED illuminating source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101211094A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262341A (en) * | 2010-05-24 | 2011-11-30 | 鸿富锦精密工业（深圳）有限公司 | Projector |
| WO2012024850A1 (en) * | 2010-08-27 | 2012-03-01 | 浙江金成科技发展有限公司 | Optical structure of led liquid crystal projector with single polarization converter |
| CN102929090A (en) * | 2012-11-26 | 2013-02-13 | 天津九宸数字影像技术有限公司 | Snake-neck-shaped universal projector |
| CN103040444A (en) * | 2012-12-24 | 2013-04-17 | 杭州柏拉图科技有限公司 | Near-infrared body-surface vessel detector |
| CN103592813A (en) * | 2013-11-15 | 2014-02-19 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
-
2007
- 2007-12-21 CN CNA2007101448848A patent/CN101211094A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102262341A (en) * | 2010-05-24 | 2011-11-30 | 鸿富锦精密工业（深圳）有限公司 | Projector |
| WO2012024850A1 (en) * | 2010-08-27 | 2012-03-01 | 浙江金成科技发展有限公司 | Optical structure of led liquid crystal projector with single polarization converter |
| CN102929090A (en) * | 2012-11-26 | 2013-02-13 | 天津九宸数字影像技术有限公司 | Snake-neck-shaped universal projector |
| CN103040444A (en) * | 2012-12-24 | 2013-04-17 | 杭州柏拉图科技有限公司 | Near-infrared body-surface vessel detector |
| CN103592813A (en) * | 2013-11-15 | 2014-02-19 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
| CN103592813B (en) * | 2013-11-15 | 2014-10-29 | 钱开明 | Large-screen back-projection straight-projection type ultrashort-distance imaging display device |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20080702 |