CN102196216A - Projection system - Google Patents
Projection system Download PDFInfo
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- CN102196216A CN102196216A CN201010128798XA CN201010128798A CN102196216A CN 102196216 A CN102196216 A CN 102196216A CN 201010128798X A CN201010128798X A CN 201010128798XA CN 201010128798 A CN201010128798 A CN 201010128798A CN 102196216 A CN102196216 A CN 102196216A
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- laser
- light source
- projection system
- mirror
- driving circuit
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- Mechanical Optical Scanning Systems (AREA)
Abstract
The invention discloses a projection system, which comprises a light source unit, a light source driving circuit, a scanning unit, a scanning unit driving circuit, an emergent mirror, a plurality of sensors and a controller, wherein the light source driving circuit is used for driving the light source unit; the scanning unit is provided with a scanning lens, and is used for receiving laser from the light source unit, and sending the laser out; the scanning unit driving circuit is used for driving the swing of the scanning lens; the emergent mirror is substantially sheeted, and has a projection imaging area; the sensors can be arranged outside the projection imaging area, and are used for receiving the laser sent out by the scanning unit, and generating a feedback signal according to laser input conditions; and the controller receives the feedback signal, and controls the light source driving circuit and the scanning unit driving circuit. The sensors are arranged outside the projection imaging area, so the projection system provided by the invention can sense the running conditions of the scanning lens and further avoid the laser with high power irradiating an inflammable or a human body for long to cause a fire accident or burn when the scanning lens is motionless.
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 detecting the scan mirror operation conditions.
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, an outgoing mirror and a controller.Described scanning element has the scan mirror that can swing.When mobile phone, personal digital assistant, portable projector etc. are in unlatching or self check state, the controller gated sweep cell driving circuit and the light source driving circuit of described optical projection system, described scanning element drive circuit driven sweep eyeglass swing is used to control the light source driving circuit of exporting corresponding signal of video signal and generates and the high-power laser of output device the driving light source unit simultaneously.Penetrate and pass the outgoing mirror with scan mode by the swing of scan mirror by the laser of light source cell output and be projected on the perspective plane.
Yet, the operation conditions that is difficult to detect scan mirror in the existing optical projection system use, especially when scan mirror can't be swung, laser can't be by scan mirror swing and projection, at this moment, laser will and pool pencil perpendicular to the incident of outgoing mirror, and the high power laser light of this output is radiated at the generation that causes the fire or the accident of burning on combustibles or the human body easily for a long time, so be necessary to research and develop a kind of optical projection system that can be used for detecting the scan mirror operation conditions at the defective of the existing optical projection system of this kind.
Summary of the invention
The objective of the invention is defective, a kind of optical projection system that can be used for detecting the scan mirror operation conditions is provided at the existence of above-mentioned background technology.
For achieving the above object, optical projection system provided by the invention comprises a light source cell, a light source driving circuit, one scan unit, one scan cell driving circuit, an outgoing mirror, some perceptrons and a controller.Light source driving circuit generates laser in order to the driving light source unit, scanning element has the scan mirror that can swing, in order to the laser of accepting light source cell and send, the scanning element drive circuit is in order to the swing of driven sweep eyeglass, the outgoing mirror roughly in the form of sheets and have a projection imaging zone, perceptron can be arranged on outside the projection imaging zone, in order to accepting laser that scanning element sends and to generate feedback signal according to the laser input status, controller is accepted feedback signal and is controlled light source driving circuit and the scanning element drive circuit.
In sum, optical projection system of the present invention is by being provided with perceptron outside the projection imaging zone, so can detect the operation conditions of scan mirror, thereby can avoid shining the fire incident that causes on combustibles or the human body for a long time or burning because of scan mirror causes high-power laser when motionless.
Description of drawings
Fig. 1 is the structural representation of optical projection system of the present invention.
Fig. 2 is the scan mirror work schematic diagram of optical projection system of the present invention.
The schematic diagram of laser radiation on the outgoing mirror of sending by scanning element when Fig. 3 works for optical projection system of the present invention.
Formed irradiation area schematic diagram when the laser that Fig. 4 is sent by scanning element during for optical projection system operate as normal of the present invention arrives the outgoing mirror.
The description of reference numerals of each element is as follows among the figure:
Optical projection system 100
Light source cell 10 light source driving circuits 20
Scanning element 30 scan mirror 301
Irradiation area 31 transmissive zones 311
Can not regional transmission 312 scanning element drive circuits 40
Perceptron 60 controllers 70
Embodiment
By describing technology contents of the present invention, structural feature in detail, reached purpose and effect, below exemplify now that embodiment and conjunction with figs. are detailed gives explanation.
See also Fig. 1, 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, a plurality of perceptron 60 and a controller 70.
See also Fig. 1 and Fig. 2, the controller 70 of optical projection system 100 of the present invention is in order to control light source driving circuit 20 and scanning element drive circuit 40.Described light source driving circuit 20 generates laser in order to driving light source unit 10, described scanning element drive circuit 40 is in order to driven sweep unit 30, and but this scanning element 30 has the scan mirror 301 of a reciprocally swinging, in order to the laser of accepting light source cell 10 and send.The laser that described outgoing mirror 50 is sent by scanning element 30 in order to transmission and with image projecting on the (not shown) of perspective plane.When optical projection system 100 was in unlatching or self check state, controller 70 sent the corresponding driving signal to scanning element drive circuit 40 and light source driving circuit 30 respectively.The scan mirror 301 of described scanning element drive circuit 40 driven sweep unit 30 is reciprocally swinging back and forth.Described controller 70 sends the corresponding synchronous drive signal to light source driving circuit 30 simultaneously, and make light source driving circuit 30 driving light source unit 10 generate laser, the laser projections that described light source cell 10 generates is on the scan mirror 301 of reciprocally swinging back and forth, reciprocally swinging back and forth by scan mirror 301, so laser is sent with scan mode, and laser is through being incident upon image on the (not shown) of perspective plane behind the outgoing mirror 50.
See also Fig. 2, the axle that this scan mirror 301 can be wound under the driving of scanning element drive circuit 40 simultaneously perpendicular to paper rotates with the axle that is parallel to paper, when scan mirror 301 is wound when rotating perpendicular to the axle of paper, can on a dimension, carry out image scanning through the reflection of scan mirror 301 by the laser of light source cell 10 incidents; In like manner, when scan mirror 301 can be carried out image scanning and turned back on another dimension when the axle that is parallel to paper rotates, can be long than other identical sweep time that scanning pattern spent, promptly can produce the regular hour delay at extreme position.
See also Fig. 3., outgoing mirror 50 roughly in the form of sheets and have a projection imaging zone 501, this projection imaging zone 501 is formed by the light transmissive material manufacturing of transmissive laser.Described perceptron 60 generates feedback signal in order to the laser accepting scanning element 30 and send and according to the laser input status.
See also Fig. 3 and Fig. 4, in optical projection system 100 of the present invention, the laser of being sent by scan mirror 301 is formed with an irradiation area 31 when arriving outgoing mirror 50.The shape size of this irradiation area 31 all is slightly larger than the projection imaging zone 501 of outgoing mirror 50, and this irradiation area 31 can further be divided into transmissive zone 311 and can not regional transmission 312, corresponding one by one during the consistent and projection of the projection imaging of described transmissive zone 311 shapes size and outgoing mirror 50 regional 501.The zone that forms behind near the described laser projection when can not projected area 312 scanning the extreme position for the scan mirror 301 of optical projection system 100 of the present invention, and be incident upon the laser that this can not regional transmission and do not have signal of video signal.In the preferred embodiment shown in the optical projection system 100 of the present invention, the projection imaging zone 501 of outgoing mirror 50 roughly is square, and as shown in Figure 3, the length and width in outgoing mirror 50 projection imaging zones 501 are consistent with the length and width in transmissive zone 311 size.
Because of the projection imaging zone 501 of irradiation area 31 greater than outgoing mirror 50, and the transmissive of irradiation area 31 zone 311 is consistent with the projection imaging zone 501 shapes size of outgoing mirror 50, at optical projection system 100 above-mentioned situations of the present invention as can be known:
When outgoing mirror 50 lens shape size reduction are big or small to projection imaging zone 501 shapes of outgoing mirror 50, the transmissive zone 311 that is outgoing mirror 50 eyeglasses and irradiation area 31 is fully at once, the peripheral border of outgoing mirror 50 is can corresponding formation described can not regional transmission 312, this can not regional transmission 312 can as in order to projector's housing (not shown) of fixing outgoing mirror 50 on the corresponding corresponding region of formation, so perceptron 60 can be arranged on projector's housing (not shown) the above can not regional transmission 312 the corresponding region in order to the detected light signal, and in other embodiments, also can determine that perceptron 60 is in particular location situation and quantity that can not regional transmission 312 at specific embodiments.
When outgoing mirror 50 lens shape sizes during more than or equal to irradiation area 31, be that irradiation area 31 is can be incident upon on the outgoing mirror 50 fully the time, at this moment, can be on outgoing mirror 50 this outgoing mirror 50 with can not some perceptrons 60 be set in order to the detected light signal in regional transmission 312 corresponding zones, in the specific embodiment of optical projection system 100 of the present invention, as shown in Figure 3, described edge corner place that can not regional transmission 312 is distributed with at least one perceptron 60.In other specific embodiment, also can determine the particular location and the quantity of perceptron 60 corresponding region on outgoing mirror 50 at specific embodiments.All should be included in the claim of optical projection system 100 of the present invention in this outgoing mirror 50 and other equivalent variation of position that can not regional transmission 501 corresponding corresponding regions distributes and quantity to perceptron 60.In addition, the corresponding region on the outgoing mirror 50 can be provided with in this corresponding region or in this corresponding region with applying coating that can not transmission laser can not transmission laser assembly and with outgoing mirror 50 mutually assembling cooperates to reach optical projection system 100 simultaneously and detects the demand of projections.
When outgoing mirror 50 shape sizes are between transmissive zone 311 and irradiation area 311, promptly can not regional transmission 312 can be simultaneously on the outgoing mirror and when forming the corresponding region on the assemblies such as projector's housing (not shown), at this moment, can perceptron 60 be arranged on corresponding region on the outgoing mirror 50 according to specific embodiments and also can be arranged on corresponding region on the assemblies such as projector's housing (not shown), also can make concrete layout to perceptron 60 on the position being provided with, not repeat them here according to the demand of specific embodiments.
Yet above-mentioned three kinds of situations; can not contain lid and utilize all situations that can not projected area 312 carries out detecting fault; be to be noted that all utilizations can not regional transmission 312 carry out detecting fault and covered in the protection range of this patent all should containing of detecting by laser that can not the regional transmission internal reflection.
Please continue and consult Fig. 1, Fig. 3 and Fig. 4, in this specific embodiment, projection imaging zone 501 roughly is rectangle, and outgoing mirror 50 lens shapes size is corresponding one by one with irradiation area 31 just, and promptly this moment, irradiation area 31 can be incident upon on the outgoing mirror 50 fully.This outgoing mirror 50 is provided with at least one perceptron 60 with the edge corner place same position of corresponding region that can not regional transmission 312 on the outgoing mirror 50, and promptly the outside same position at the edge corner place in projection imaging zone 501 is provided with at least one perceptron 60.During scan mirror 301 normal swings, the laser projections of being sent by scanning element 30 is on outgoing mirror 50, being radiated at a laser part on the outgoing mirror 50 passes projection imaging zone 501 and corresponding image is incident upon on the (not shown) of perspective plane, another part laser projections on outgoing mirror 50 this outgoing mirror 50 with can not regional transmission 312 corresponding zones, near and the laser of when scan mirror 301 scans the extreme position, being sent, can accept and generate corresponding feedback signal by perceptron 60, the feedback signal of output is accepted by controller 70, and move normal signal by controller 70 judgements and output scanning eyeglass 301 and give the display unit (not shown), can make this optical projection system 100 and operating personnel know that projector equipment is in the situation of normal operation and does next step relevant operation by this.
In the optical projection system 100 of the present invention, during the undesired swing of scan mirror 301, there are two kinds of situations.First kind of situation: promptly can't swing and rest on middle position or swing when not in place when scan mirror 301, the laser of sending after scanning element 30 scannings can't be accepted by perceptron 60, at this moment, perceptron 60 generates the relevant controller 70 that feeds back signal to, judge that by controller 70 also the abnormal signal of output scanning eyeglass 301 operations is given the display unit (not shown), can make this optical projection system 100 and operating personnel know that projector equipment is in the situation of irregular operating and does next step relevant operation by this.
Second kind of situation: promptly when scan mirror 301 perpendicular to the axle of paper be parallel to arbitrary can't swing on axial time of axle of paper, though the laser of sending after scanning element 30 scannings can be accepted by perceptron 60, but it is variant when the time interval of the laser that perceptron 60 receives and frequency are all normally swung with scan mirror, the feedback signal that perceptron 60 generates is accepted to judge by controller 70 and the abnormal signal of output scanning eyeglass 301 operations is given the display unit (not shown), can make this optical projection system 100 and operating personnel know that projector equipment is in the situation of irregular operating and does next step relevant operation by this.
Optical projection system of the present invention is not limited in above-mentioned specific embodiment, and the equivalence of other specific embodiments changes, and all should belong to scope of patent protection of the present invention.
In sum, optical projection system of the present invention is arranged on perceptron 60 outside the projection imaging zone 501, so can detect the operation conditions of scan mirror 301, thereby can avoid shining the fire incident that causes on combustibles or the human body for a long time or burning because of scan mirror 301 causes high-power laser when motionless.
Claims (7)
1. optical projection system, it comprises a light source cell, one light source driving circuit, the one scan unit, the one scan cell driving circuit, one outgoing mirror, some perceptrons, one controller, light source driving circuit generates laser in order to the driving light source unit, scanning element has the scan mirror that can swing, in order to the laser of accepting light source cell and send, the scanning element drive circuit is in order to the swing of driven sweep eyeglass, controller is accepted feedback signal and is controlled light source driving circuit and the scanning element drive circuit, it is characterized in that: the outgoing mirror has a projection imaging zone, perceptron is arranged on outside the projection imaging zone, in order to accept laser that scanning element sends and to generate feedback signal according to the laser input status.
2. optical projection system according to claim 1 is characterized in that: the laser of being sent by scan mirror is formed with an irradiation area when arriving the outgoing mirror, and the shape size of this irradiation area all is slightly larger than the projection imaging zone of outgoing mirror.
3. optical projection system according to claim 2 is characterized in that: irradiation area can further be divided into transmissive zone and can not regional transmission.
4. optical projection system according to claim 3 is characterized in that: corresponding one by one during the regional consistent and projection of transmissive region shape size and the projection imaging of outgoing mirror.
5. optical projection system according to claim 4 is characterized in that: the projection imaging zone is square, and this outgoing mirror is provided with at least one perceptron with the edge corner place same position of corresponding region that can not regional transmission on the outgoing mirror.
6. optical projection system according to claim 3 is characterized in that: can not regional transmission be the zone that forms behind near the laser projection of scan mirror when scanning the extreme position, and be incident upon can not regional transmission laser do not have signal of video signal.
7. optical projection system according to claim 1 is characterized in that: the axle that scan mirror can be wound perpendicular to paper rotates with the axle that is parallel to paper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010128798XA CN102196216A (en) | 2010-03-12 | 2010-03-12 | Projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010128798XA CN102196216A (en) | 2010-03-12 | 2010-03-12 | Projection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102196216A true CN102196216A (en) | 2011-09-21 |
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ID=44603516
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010128798XA Pending CN102196216A (en) | 2010-03-12 | 2010-03-12 | Projection system |
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| Country | Link |
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| CN (1) | CN102196216A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998912A (en) * | 2012-12-21 | 2013-03-27 | 珠海天威飞马打印耗材有限公司 | Developing apparatus and developing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101005594A (en) * | 2006-01-18 | 2007-07-25 | 三星电子株式会社 | Image display apparatus and control method therefor |
| CN101331751A (en) * | 2005-12-13 | 2008-12-24 | 皇家飞利浦电子股份有限公司 | Device and method for laser safe operation |
| US20100033691A1 (en) * | 2008-08-05 | 2010-02-11 | Chang-Li Hung | Scanning projection apparatus with phase detection and compensation |
| CN201662678U (en) * | 2010-03-12 | 2010-12-01 | 富港电子（东莞）有限公司 | Projection system |
-
2010
- 2010-03-12 CN CN201010128798XA patent/CN102196216A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101331751A (en) * | 2005-12-13 | 2008-12-24 | 皇家飞利浦电子股份有限公司 | Device and method for laser safe operation |
| CN101005594A (en) * | 2006-01-18 | 2007-07-25 | 三星电子株式会社 | Image display apparatus and control method therefor |
| US20100033691A1 (en) * | 2008-08-05 | 2010-02-11 | Chang-Li Hung | Scanning projection apparatus with phase detection and compensation |
| CN201662678U (en) * | 2010-03-12 | 2010-12-01 | 富港电子（东莞）有限公司 | Projection system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102998912A (en) * | 2012-12-21 | 2013-03-27 | 珠海天威飞马打印耗材有限公司 | Developing apparatus and developing method |
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Application publication date: 20110921 |