CN102375239A - Projection system and method - Google Patents
Projection system and method Download PDFInfo
- Publication number
- CN102375239A CN102375239A CN2010102672895A CN201010267289A CN102375239A CN 102375239 A CN102375239 A CN 102375239A CN 2010102672895 A CN2010102672895 A CN 2010102672895A CN 201010267289 A CN201010267289 A CN 201010267289A CN 102375239 A CN102375239 A CN 102375239A
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- projection
- scan mirror
- processor
- 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
Abstract
The invention discloses a projection system and method. The projection system comprises a light source unit, a scanning unit, at least one sensor and a processor, wherein the light source unit is used for generating laser light and sensing light; the scanning unit is provided with a scanning lens; the laser light projects to form a projection region and a peripheral invisible region; the sensor is arranged in the invisible region and used for receiving the sensing light and generating a feedback signal; and the processor can be used for receiving the feedback signal and judging the initial swing position of the scanning lens, thereby controlling a projection sequence. According to the projection system disclosed by the invention, the sensing light is transmitted in a scanning way and received by the sensor to generate the feedback signal. The processor can be used for receiving the feedback signal, judging the initial swing position of the scanning lens and controlling the projection sequence, thereby correcting the problems that the projection is upside down and heterochiral.
Description
Technical field
The present invention relates to a kind of optical projection system, relate in particular to a kind of optical projection system of using accuracy that improves.
Background technology
A kind of existing optical projection system that can be applicable in the electronic products such as mobile phone, personal digital assistant, Portable projector comprises a light source cell, a light source driving circuit, one scan unit, one scan cell driving circuit and a processor.Said scanning element has the scan mirror of reciprocally swinging back and forth.Said processor gated sweep cell driving circuit and light source driving circuit; Said scanning element driving circuit is swung in order to the driven sweep eyeglass; Light source driving circuit can driving light source the unit generate and laser light use in the high-power projection of output device, penetrate also projection in outgoing mirror on laser light through the swing of scan mirror and with scan mode by the projection of light source cell output.
But; In the existing optical projection system use; Owing to can't guarantee the position of scan mirror starting; And the position of scan mirror starting does not meet when envisioning; Projection can't be passed through scan mirror normal projection with laser light, and turning upside down appears in the data that can cause being projected, heterochiral situation, thus to the defective of the existing optical projection system of this kind be necessary to research and develop a kind of detect scan mirror operation conditions and then data that prevention projected occur turning upside down, about the optical projection system of opposite situation.
Summary of the invention
One of the object of the invention matter is to overcome above-mentioned deficiency of the prior art, and a kind of optical projection system of using accuracy that improves is provided.
For realizing above-mentioned purpose, the present invention provides a kind of optical projection system, and it comprises a light source cell, a light source driving circuit, one scan unit, one scan cell driving circuit, an outgoing mirror, at least one perceptron and a processor.Light source cell is in order to generate laser light and detected light.Light source driving circuit generates the detected light of laser light and periodic transmission in order to the driving light source unit.Scanning element have one can be simultaneously around the scan mirror of the axis swing of both direction, scan mirror is accepted the laser light of light source cell and is seen off, this laser light projection of seeing off forms a view field and a peripheral invisible range territory.The scanning element driving circuit is in order to the swing of driven sweep eyeglass.Perceptron is arranged in the invisible range territory, in order to accept detected light that scanning element sees off and to generate feedback signal according to the detected light input status.Processor can be accepted feedback signal, according to the initial swing position of feedback signal judgement scan mirror, and according to initial swing position message control projection sequence.
As stated, the detected light that can light source cell be seen off of optical projection system of the present invention is seen off with scan mode through the swing of scan mirror and is accepted and generated feedback signal according to the detected light input status by perceptron.Said processor can be accepted feedback signal; Judge the initial swing position of scan mirror according to feedback signal; And correct according to initial swing position message control projection sequence that projection is turned upside down, heterochiral problem; Thereby can avoid prior art because of the enable position of scan mirror with preset not simultaneously, occur that projection is turned upside down, heterochiral situation.
Two of the object of the invention is to overcome above-mentioned deficiency of the prior art, and a kind of a kind of projecting method that optical projection system is used accuracy that improves that provides is provided.
For reaching above-mentioned purpose, the projecting method of optical projection system provided by the present invention comprises the steps:
(1) light source driving circuit driving light source unit generates the detected light of laser light and periodic transmission, and laser light and detected light can be seen off via scan mirror around the swing of both direction axis simultaneously;
(2) processor is judged the initial swing position of scan mirror according to the situation of perceptron sensing detected light;
(3) processor is according to initial swing position message control light source cell projection sequence.
As stated, the detected light that can light source cell be seen off of projecting method of the present invention is seen off with scan mode through the swing of scan mirror and is accepted and generated feedback signal according to the detected light input status by perceptron.Said processor can be accepted feedback signal; Judge the initial swing position of scan mirror according to feedback signal; And correct according to initial swing position message control projection sequence that projection is turned upside down, heterochiral problem; Thereby can avoid prior art because of the enable position of scan mirror with preset not simultaneously, projection is turned upside down, heterochiral situation.
Description of drawings
Fig. 1 is the structured flowchart of a kind of embodiment of optical projection system of the present invention.
Fig. 2 is the structural representation of the scan mirror of optical projection system shown in Figure 1.
Fig. 3 is the synoptic diagram of the outgoing mirror of optical projection system shown in Figure 1.
The description of reference numerals of each parts is following among the figure:
Optical projection system 100 light source cells 10
Light source driving circuit 20 scanning elements 30
Outgoing mirror 50 projection in zone 51
Invisible range 52 perceptrons 60
Processor 70
Embodiment
By specifying technology contents of the present invention, structural attitude, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
See also Fig. 1 and Fig. 2, optical projection system 100 of the present invention comprises a light source cell 10, a light source driving circuit 20, one scan unit 30, one scan cell driving circuit 40, an outgoing mirror 50, at least one perceptron 60, a processor 70 and shadow screen (not shown).
See also Fig. 1 and Fig. 2; The light source driving circuit 20 of optical projection system 100 of the present invention generates the detected light of laser light and periodic transmission in order to driving light source unit 10; Said scanning element driving circuit 40 is in order to driven sweep unit 30; And this scanning element 30 have one can be simultaneously around the scan mirror 301 of the axis swing of both direction; Laser light and detected light can be seen off via scan mirror 301 around the swing of both direction axis simultaneously, and this laser light projection of seeing off forms the invisible range territory of a view field and a periphery.
Please with reference to Fig. 3, the laser light that said outgoing mirror 50 is seen off by scanning element 30 in order to transmission and with image projecting on shadow screen (not shown).Have rectangular projection in zone 51 invisible range 52 outer that supplies projected light to pass on this outgoing mirror 50 with being positioned at projection in zone.The place, upper and lower of the invisible range 52 in said projection in zone 51 left sides is provided with said perceptron 60, and said perceptron 60 is also located or be provided with in the upper and lower of the invisible range 52 on said projection in zone 51 right sides.
When optical projection system 100 is in unlatching or self check state; The scan mirror 301 of said scanning element driving circuit 40 driven sweep unit 30 is reciprocally swinging back and forth; The laser light that said light source cell 10 generates is projeced into back and forth on the scan mirror 301 of reciprocally swinging; Through the reciprocally swinging back and forth of scan mirror 301, thus laser light is seen off with scan mode, and laser light is through being projeced into image on the shadow screen (not shown) behind the outgoing mirror 50.Said perceptron 60 is arranged in the invisible range territory, in order to accept detected light that scanning element 30 sees off and to generate feedback signal according to the detected light input status.Said processor 70 can be accepted feedback signal, according to the initial swing position of feedback signal judgement scan mirror 301, and according to initial swing position message control projection sequence.
Please consult Fig. 2 in the lump; This scan mirror 301 under the driving of scanning element driving circuit 40 around the axis high speed swinging of upward and downward and around about to the swing of axis low speed; When scan mirror 301 during, can on a dimension, carry out image scanning through the reflected light of scan mirror 301 by the laser light of light source cell 10 incidents around the swing of the axis of upward and downward; Scan mirror 301 is turned back the stage in swing, can be owing to slow down earlier and quicken again and long than other identical sweep time that scanning pattern spent, said invisible range 52 by scan mirror 301 in the laser light in the stage of turning back of swinging the view field of correspondence.Simultaneously, when scan mirror 301 around about to axis swing, reflected light can carry out image scanning on another dimension.
Please continue and consult Fig. 2, Fig. 2 and Fig. 3, in this specific embodiment, during scan mirror 301 normal swings; Scan mirror 301 is seen detected light during to perceptron 60 off in reflected-light scanning, and the time point computing formula that said light source cell 10 generates detected light is: t=nT+T1, and wherein T representes the hunting period around an axis high speed swinging; T1 representes can just project the time on the processor 70 for the first time from starting to detected light, and n is 0,1; 2,3 Said light source cell 10 another time point computing formula that generate detected light are: t=nT+T2, and wherein T represented around the hunting period of an axis high speed swinging, and T2 representes time of projecting perceptron for the second time from starting to, and n is 0,1,2,3 ...The present invention provides a kind of projecting method of optical projection system in addition, comprises the steps:
(1) light source driving circuit driving light source unit generates the detected light of laser light and periodic transmission, and laser light and detected light can be seen off via scan mirror around the swing of both direction axis simultaneously;
(2) processor is judged the initial swing position of scan mirror according to the situation of perceptron sensing detected light;
(3) processor is according to initial swing position message control light source cell projection sequence.
As stated, the detected light that can light source cell 10 be seen off of optical projection system 100 of the present invention is seen off with scan mode through the swing of scan mirror 301 and is accepted and generated feedback signal according to the detected light input status by perceptron 60.Said processor 70 can be accepted feedback signal; Judge the initial swing position of scan mirror 301 according to feedback signal; And correct according to initial swing position message control projection sequence that projection is turned upside down, heterochiral problem; Thereby can avoid prior art because of the enable position of scan mirror 301 with preset not simultaneously, projection is turned upside down, heterochiral situation.
Claims (5)
1. an optical projection system comprises a light source cell, a light source driving circuit, one scan unit, one scan cell driving circuit, at least one perceptron and a processor, and light source cell is in order to generate laser light and detected light; Light source driving circuit generates the detected light of laser light and periodic transmission in order to the driving light source unit; Scanning element have one can be simultaneously around the scan mirror of the axis swing of both direction, scan mirror is accepted the laser light of light source cell and is seen off; Processor can be accepted feedback signal; Judge the initial swing position of scan mirror according to feedback signal; And according to initial swing position information Control projection sequence, it is characterized in that: this laser light projection of seeing off forms the invisible range territory of a view field and a periphery; The scanning element driving circuit is in order to the swing of driven sweep eyeglass; Perceptron is arranged in the invisible range territory, in order to accept detected light that scanning element sees off and to generate feedback signal according to the detected light input status.
2. optical projection system as claimed in claim 1 is characterized in that: said optical projection system also comprises an outgoing mirror, has the rectangular projection in zone invisible range outer with being positioned at projection in zone that supplies projected light to pass on this outgoing mirror; Said scan mirror around the axis high speed swinging of upward and downward and around about to the swing of axis low speed; The top or the place, bottom of the invisible range in said projection in zone left side are provided with said perceptron, and the top of the invisible range on said projection in zone right side or place, bottom also are provided with said perceptron.
3. a projecting method comprises the steps:
(1) light source driving circuit driving light source unit generates the detected light of laser light and periodic transmission, and laser light and detected light can be seen off via scan mirror around the swing of both direction axis simultaneously;
(2) processor is judged the initial swing position of scan mirror according to the situation of perceptron sensing detected light;
(3) processor is according to initial swing position information Control light source cell projection sequence.
4. projecting method as claimed in claim 3 is characterized in that: said scan mirror is around an axis high speed swinging and around another axis low speed swing; The time point computing formula that said light source cell generates detected light is: t=nT+T1, and wherein T represented around the hunting period of an axis high speed swinging, and T1 representes can just project the time on the perceptron for the first time from starting to detected light, and n is 0,1,2,3 Processor is accepted detected light that scanning element sees off and is generated feedback signal according to the detected light input status, and processor is judged the initial swing position of scan mirror according to feedback signal.
5. projecting method as claimed in claim 4; It is characterized in that: another time point computing formula that generates detected light of said light source cell is: t=nT+T2; Wherein T represented around the hunting period of an axis high speed swinging, and T2 representes time of projecting for the second time perceptron from starting to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102672895A CN102375239A (en) | 2010-08-20 | 2010-08-20 | Projection system and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102672895A CN102375239A (en) | 2010-08-20 | 2010-08-20 | Projection system and method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102375239A true CN102375239A (en) | 2012-03-14 |
Family
ID=45794079
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102672895A Pending CN102375239A (en) | 2010-08-20 | 2010-08-20 | Projection system and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102375239A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853124A (en) * | 2014-02-13 | 2015-08-19 | 光宝科技股份有限公司 | Projection device and image correction method thereof |
| CN104914570A (en) * | 2014-03-10 | 2015-09-16 | 光宝科技股份有限公司 | Swing detection device and swing detection method for micro scanning mirror |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546104A (en) * | 2008-03-28 | 2009-09-30 | 船井电机株式会社 | Projection image display apparatus |
| CN101646043A (en) * | 2008-08-05 | 2010-02-10 | 先进微系统科技股份有限公司 | Scanning projection apparatus with phase detection and compensation |
-
2010
- 2010-08-20 CN CN2010102672895A patent/CN102375239A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101546104A (en) * | 2008-03-28 | 2009-09-30 | 船井电机株式会社 | Projection image display apparatus |
| CN101646043A (en) * | 2008-08-05 | 2010-02-10 | 先进微系统科技股份有限公司 | Scanning projection apparatus with phase detection and compensation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104853124A (en) * | 2014-02-13 | 2015-08-19 | 光宝科技股份有限公司 | Projection device and image correction method thereof |
| CN104914570A (en) * | 2014-03-10 | 2015-09-16 | 光宝科技股份有限公司 | Swing detection device and swing detection method for micro scanning mirror |
| CN104914570B (en) * | 2014-03-10 | 2017-06-13 | 光宝电子(广州)有限公司 | The swing arrangement for detecting and its swing method for detecting of micro scanning mirror |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11402508B2 (en) | Distance-measuring system and distance-measuring method | |
| US8625082B2 (en) | Display apparatus | |
| US8011789B2 (en) | Rear projection display | |
| US20050141069A1 (en) | Method and apparatus for conserving power in a laser projection display | |
| CN104359923B (en) | Detection means and detection method | |
| CN103676145A (en) | Image display apparatus and optical component | |
| EP2549322B1 (en) | Display device, and portable apparatus having projector function | |
| TW201520599A (en) | Head-up display system | |
| CN103713797B (en) | Laser beam emitting device and man-machine interactive system | |
| US20230102878A1 (en) | Projector and projection method | |
| JPWO2011013240A1 (en) | Projection display device and light amount adjustment method | |
| CN107782354B (en) | Motion sensor detection system and method | |
| CN102375239A (en) | Projection system and method | |
| CN102193286B (en) | Projection system and projection method thereof | |
| CN104460209B (en) | A kind of structure and its LCOS for showing ray machine shows means of illumination | |
| CN103852962A (en) | Scanning projection device and scanning control method thereof | |
| US20130257702A1 (en) | Image projecting apparatus, image projecting method, and computer program product | |
| JP5335923B2 (en) | Position recognition sensor, electronic device, and display device | |
| CN109738983B (en) | Light guide plate, display device, method and equipment for repairing white spots of display device | |
| CN201662678U (en) | Projection system | |
| JP2006214922A (en) | Image processing system, projector, program, information storage medium, and image processing method | |
| CN102236239A (en) | Projection system and detection method thereof | |
| CN201662680U (en) | Projection system | |
| CN201689264U (en) | Projecting system | |
| KR101608242B1 (en) | Intelligent table providing interactive contents |
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 |
Application publication date: 20120314 |