CN102193285A - Device and method for automatically adjusting white balance of laser projector - Google Patents
Device and method for automatically adjusting white balance of laser projector Download PDFInfo
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- CN102193285A CN102193285A CN 201010128796 CN201010128796A CN102193285A CN 102193285 A CN102193285 A CN 102193285A CN 201010128796 CN201010128796 CN 201010128796 CN 201010128796 A CN201010128796 A CN 201010128796A CN 102193285 A CN102193285 A CN 102193285A
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Abstract
The invention discloses a device for automatically adjusting white balance of a laser projector. The device comprises a laser source, a heat dissipating mechanism, a microelectromechanical lens, protection glass, a drive mechanism, a temperature sensor, an inductor and a processing mechanism. Because the temperature sensor is used for detecting the temperature of the laser source and the inductor is used for detecting the power of reflection light, when the temperature of the laser source is raised, the heat dissipating mechanism is used for reducing the temperature of the laser source, and when the heat dissipating mechanism reaches the limit, the compensation value of the laser source reaching a normal output is calculated according to the received reflection light, the laser source drive correspondingly drives the laser source to generate power of the normal output according to the compensation value so that the white balance is automatically adjusted and the adjustment is simple and fast. Furthermore, the invention discloses a method for automatically adjusting white balance of a laser projector.
Description
Technical field
The present invention relates to the self-regulating device and method of a kind of white balance, relate in particular to a kind of device and method that is applicable to that the white balance to laser projection automatically adjusts.
Background technology
White balance is an important concept in the optical projection system, can solve a series of problems of color rendition and tone processing by it; So-called white balance is exactly under different light condition, adjusts the ratio of Red Green Blue, becomes white after it is mixed; Object itself is exactly the color that demonstrates itself by reflection ray, if but because the colour component of white light source changes to some extent, will influence catoptrical color, the color of object itself will be changed directly or indirectly, form aberration, this phenomenon is in the more or less freely generation of the occasion of artificial light, causes image to have in various degree aberration because the colour temperature of light fixture is different, so white balance is relevant with the colour temperature that three primary colors synthesize.
In laser projection, the adjustment of white balance is often by regulating manually, but laser projection with laser as light source, laser is very responsive to temperature, so laser can have aging problem because of the time length of using, perhaps because variation of temperature causes the output power of laser deficiency, these problems often slowly just take place after start is used, therefore, the parameter of importing in advance in the time of might starting shooting is the just change of Yin Wendu and inapplicable after a period of time, so the automatic adjusting of white balance is particularly important.
Summary of the invention
The objective of the invention is to provide a kind of and can regulate the device and method of laser projection white balance automatically at above-mentioned the deficiencies in the prior art.
For achieving the above object, laser projection white balance self-checking device provided by the present invention comprises LASER Light Source, cooling mechanism, micro electronmechanical eyeglass, cover glass, driving mechanism, temperature sensor, inductor and processing mechanism; Described LASER Light Source is used to produce the required laser of projector; Described cooling mechanism is used to discharge the heat that described LASER Light Source produces; Described micro electronmechanical eyeglass is used for the laser-bounce that described LASER Light Source produces is gone out; Described cover glass and the corresponding installation of described micro electronmechanical eyeglass are used for the light that described micro electronmechanical eyeglass reflects throwed away to form penetrating light, and form reflected light through the light of described cover glass partial reflection; Described driving mechanism comprises micro electronmechanical eyeglass driver and LASER Light Source driver, and described micro electronmechanical eyeglass driver is used to drive described micro electronmechanical eyeglass swing, and described LASER Light Source driver is used to drive the power that described LASER Light Source produces normal output; Described temperature sensor is used to detect the temperature of described LASER Light Source; Described inductor is used to detect the catoptrical power that forms through described cover glass partial reflection; Described processing mechanism prestores the power range values of the normal output of described LASER Light Source, the reflected light that described processing mechanism receives according to described inductor calculates the offset that described LASER Light Source reaches normal output, and described LASER Light Source driver is according to the corresponding power that drives the normal output of described LASER Light Source generation of described offset.
Correspondingly, the present invention also provides a kind of laser projection white balance Automatic adjustment method, comprises the steps: that (1) receives the temperature and the detected catoptrical power of detected LASER Light Source; (2) based on the temperature and the catoptrical power of the LASER Light Source that detects, calculate the offset that LASER Light Source reaches normal output; (3) produce the power of normal output according to described offset control LASER Light Source.
As mentioned above, laser projection white balance self-checking device of the present invention adopts the temperature of temperature sensor detection laser light source, the power of inductor detection of reflected light, when the LASER Light Source temperature raises, adopt cooling mechanism to reduce the temperature of LASER Light Source, when cooling mechanism reaches the limit of, calculate the offset that LASER Light Source reaches normal output according to the reflected light that receives, the LASER Light Source driver is according to the corresponding power that drives the normal output of described LASER Light Source generation of described offset, and then realization makes adjusting simple, quick to the automatic adjusting of white balance.
Description of drawings
Fig. 1 is the theory diagram of laser projection white balance self-checking device of the present invention.
Fig. 2 is the process flow diagram of laser projection white balance Automatic adjustment method of the present invention.
Fig. 3 is the theory diagram of first embodiment of laser projection white balance self-checking device of the present invention.
Fig. 4 is the theory diagram of second embodiment of laser projection white balance self-checking device of the present invention.
Each description of reference numerals is as follows among the figure:
Laser projection white balance self-checking device 100
Micro electronmechanical eyeglass driver 101 LASER Light Source drivers 102
LASER Light Source 103 micro electronmechanical eyeglasses 104
Embodiment
By describing technology contents of the present invention, structural attitude in detail, realized purpose and effect, give explanation below in conjunction with embodiment and conjunction with figs. are detailed.
Please refer to Fig. 1, laser projection white balance self-checking device 100 of the present invention comprises driving mechanism, LASER Light Source 103, micro electronmechanical eyeglass 104, cover glass 105, temperature sensor 106, cooling mechanism 107, processing mechanism 110 and inductor 108, and driving mechanism further comprises micro electronmechanical eyeglass driver 101, LASER Light Source driver 102; Wherein, LASER Light Source 103 is used to produce the required laser of projector; Micro electronmechanical eyeglass 104 is used for the laser-bounce that described LASER Light Source 103 produces is gone out; Cover glass 105 and micro electronmechanical eyeglass 104 corresponding installations are used for the light that micro electronmechanical eyeglass 104 reflects throwed away to form penetrating light, form reflected light through the light of described cover glass 105 partial reflections; Cooling mechanism 107 is used to discharge the heat that described LASER Light Source 103 produces; Micro electronmechanical eyeglass driver 101 is used to drive micro electronmechanical eyeglass 104 swings, LASER Light Source driver 102 is used to drive described LASER Light Source 103 and produces the power of normal output, and LASER Light Source driver 102 and micro electronmechanical eyeglass driver 101 all are electrically connected with processing mechanism 110; Temperature sensor 106 is used to detect the temperature of described LASER Light Source 103; Inductor 108 is used to detect the catoptrical power that forms through described cover glass 105 partial reflections; Processing mechanism 110 prestores the power range values of described LASER Light Source 103 normal outputs, the reflected light that processing mechanism 110 receives according to described inductor calculates the offset that described LASER Light Source 103 reaches normal output, and described LASER Light Source driver 102 is according to the corresponding power that drives the normal output of described LASER Light Source 103 generations of described offset.
Please refer to Fig. 2, laser projection white balance Automatic adjustment method of the present invention comprises the steps:
(S001) temperature and the detected catoptrical power of the detected LASER Light Source of reception;
(S002) based on the temperature and the catoptrical power of the LASER Light Source that detects, calculate the offset that LASER Light Source reaches normal output;
(S003) produce the power of normal output according to described offset control LASER Light Source.
Please refer to Fig. 3; among first embodiment of laser projection white balance self-checking device 100 of the present invention; inductor is an imageing sensor 108, and imageing sensor 108 is used to detect the catoptrical power that forms through cover glass 105 partial reflections and power signal is changed into digital signal to be exported.
Principle to this embodiment is elaborated below, after the system start-up, LASER Light Source driver 102 driving laser light sources 103 send laser, micro electronmechanical eyeglass driver 101 drives micro electronmechanical eyeglass 104 swings, laser is penetrated in the mode that scans by the swing of micro electronmechanical eyeglass 104, the laser that penetrates through micro electronmechanical eyeglass 104 throws away to form by cover glass 105 penetrates light, in the process that laser projections is gone out, because laser, therefore has a spot of laser by different medium and is reflected and returns to form reflected light; In system's operational process, the output power of LASER Light Source 103 can reduce along with the rising of environment temperature and self heat, therefore, temperature sensor 106 is used for the temperature of detection laser light source 103 and temperature signal sent to processing mechanism 110, imageing sensor 108 is used for the power of detection of reflected light, and sends to processing mechanism 110 after detected performance number changed into digital signal; When temperature sensor 106 detected the temperature rising of LASER Light Source 103, processing mechanism 110 control cooling mechanisms 107 started the heat that is used to discharge LASER Light Source 103; When cooling mechanism 107 has reached the limit, rising along with temperature, the output power of LASER Light Source 103 can reduce once again, at this moment, the reflected light that processing mechanism 110 receives according to imageing sensor 108 calculates the offset that LASER Light Source 103 reaches normal output, and according to the normal performance number of exporting of offset control LASER Light Source driver 102 corresponding driving laser light sources 103 generations, thereby the automatic adjusting of realization white balance.
Please refer to Fig. 4, among second embodiment of laser projection white balance self-checking device 100 of the present invention, inductor is optical sensor 109a, and this laser projection white balance self-checking device 100 also comprises current-to-voltage convertor 109b and digital quantizer 109c; Optical sensor 109a is used to detect the catoptrical power that forms through cover glass 105 partial reflections; and the form that power signal changes into electric current outputed to current-to-voltage convertor 109b; current-to-voltage convertor 109b is converted into voltage signal with current signal and outputs to digital quantizer 109c, and digital quantizer 109c changes into digital signal with voltage signal and sends to processing mechanism 110.
Principle to this embodiment is elaborated below, after the system start-up, LASER Light Source driver 102 driving laser light sources 103 send laser, micro electronmechanical eyeglass driver 101 drives micro electronmechanical eyeglass 104 swings, laser is penetrated in the mode that scans by the swing of micro electronmechanical eyeglass 104, the laser that penetrates through micro electronmechanical eyeglass 104 throws away to form by cover glass 105 penetrates light, in the process that laser projections is gone out, because laser, therefore has a spot of laser by different medium and is reflected and returns to form reflected light; In system's operational process, the output power of LASER Light Source 103 can reduce along with the rising of environment temperature and self heat, therefore, temperature sensor 106 is used for the temperature of detection laser light source and temperature signal sent to processing mechanism 110, optical sensor 109a is used for the power of detection of reflected light, and detected performance number changed into electric current output, current-to-voltage convertor 109b changes into voltage output with electric current, and digital quantizer 109c becomes voltage transitions digital signal to send to processing mechanism 110 again; When temperature sensor 106 detected the rising of LASER Light Source 103 temperature, processing mechanism 110 control cooling mechanisms 107 started the heat that is used to discharge LASER Light Source 103; When cooling mechanism 107 has reached the limit, rising along with temperature, the output temperature of LASER Light Source 106 can reduce once again, the reflected light that this moment, processing mechanism 110 received according to imageing sensor 108 calculates the offset that LASER Light Source 103 reaches normal output, and according to the normal performance number of exporting of offset control LASER Light Source driver 102 corresponding driving laser light sources 103 generations, thereby the automatic adjusting of realization white balance.
To sum up, laser projection white balance self-checking device 100 of the present invention adopts the temperature of temperature sensor 106 detection laser light sources 103, the power of optical sensor or imageing sensor detection of reflected light, when LASER Light Source 103 temperature raise, adopt cooling mechanism 107 to reduce the temperature of LASER Light Source, when cooling mechanism 107 reaches the limit of, calculate the offset that LASER Light Source 103 reaches normal output according to the reflected light that receives, LASER Light Source driver 102 is according to the corresponding power that drives the normal output of described LASER Light Source 103 generations of described offset, and then realization makes and regulates simply the automatic adjusting of white balance, fast.
Claims (6)
1. a laser projection white balance self-checking device is characterized in that, comprising:
LASER Light Source is used to produce the required laser of laser projection;
Cooling mechanism is used to discharge the heat that described LASER Light Source produces;
Micro electronmechanical eyeglass is used for the laser-bounce that described LASER Light Source produces is gone out;
Cover glass, described cover glass and the corresponding installation of described micro electronmechanical eyeglass are used for the light that described micro electronmechanical eyeglass reflects throwed away to form penetrating light, and form reflected light through the light of described cover glass partial reflection;
Driving mechanism, described driving mechanism comprises micro electronmechanical eyeglass driver and LASER Light Source driver, described micro electronmechanical eyeglass driver is used to drive described micro electronmechanical eyeglass swing, and described LASER Light Source driver is used to drive the power that described LASER Light Source produces normal output;
Temperature sensor is used to detect the temperature of described LASER Light Source;
Inductor is used to detect the catoptrical power that forms through described cover glass partial reflection;
Processing mechanism, described processing mechanism prestores the power range values of the normal output of described LASER Light Source, the reflected light that described processing mechanism receives according to described inductor calculates the offset that described LASER Light Source reaches normal output, and described LASER Light Source driver is according to the corresponding power that drives the normal output of described LASER Light Source generation of described offset.
2. laser projection white balance self-checking device as claimed in claim 1 is characterized in that: described inductor is an imageing sensor.
3. laser projection white balance self-checking device as claimed in claim 1 is characterized in that: described inductor is an optical sensor.
4. laser projection white balance self-checking device as claimed in claim 3, it is characterized in that: also comprise current-to-voltage convertor and digital quantizer, described current-to-voltage convertor is electrically connected with described optical sensor and described digital quantizer, and described digital quantizer is electrically connected with described processing mechanism.
5. a laser projection white balance Automatic adjustment method is characterized in that, comprises the steps:
(1) temperature and the detected catoptrical power of the detected LASER Light Source of reception;
(2) based on the temperature and the catoptrical power of the LASER Light Source that detects, calculate the offset that LASER Light Source reaches normal output;
(3) produce the power of normal output according to described offset control LASER Light Source.
6. laser projection white balance Automatic adjustment method as claimed in claim 5 is characterized in that, described step (1) also comprises before: the normal power range values of exporting of LASER Light Source is prestored to handle in the mechanism.
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| CN 201010128796 CN102193285A (en) | 2010-03-12 | 2010-03-12 | Device and method for automatically adjusting white balance of laser projector |
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| CN 201010128796 CN102193285A (en) | 2010-03-12 | 2010-03-12 | Device and method for automatically adjusting white balance of laser projector |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102866571A (en) * | 2012-07-23 | 2013-01-09 | 苏州佳世达光电有限公司 | Light source system |
| CN103376631A (en) * | 2012-04-17 | 2013-10-30 | 三菱电机株式会社 | Laser light source projector |
| CN104914656A (en) * | 2012-08-06 | 2015-09-16 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and relevant projection system |
| US9253460B1 (en) | 2014-09-17 | 2016-02-02 | SZ DJI Technology Co., Ltd. | Automatic white balancing system and method |
| CN108205997A (en) * | 2016-12-20 | 2018-06-26 | 日立乐金光科技株式会社 | Laser projection display apparatus |
| CN110088526A (en) * | 2017-03-09 | 2019-08-02 | 宝马股份公司 | Lighting device for motor vehicle |
| US11543742B2 (en) | 2021-02-09 | 2023-01-03 | Delta Electronics, Inc. | Light source module and projection device |
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| CN1885645A (en) * | 2005-06-20 | 2006-12-27 | 精工爱普生株式会社 | Laser source device, display device, and projector |
| CN101005594A (en) * | 2006-01-18 | 2007-07-25 | 三星电子株式会社 | Image display apparatus and control method therefor |
| CN101243357A (en) * | 2005-08-26 | 2008-08-13 | 松下电器产业株式会社 | Projection display device |
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| CN1885645A (en) * | 2005-06-20 | 2006-12-27 | 精工爱普生株式会社 | Laser source device, display device, and projector |
| CN101243357A (en) * | 2005-08-26 | 2008-08-13 | 松下电器产业株式会社 | Projection display device |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103376631A (en) * | 2012-04-17 | 2013-10-30 | 三菱电机株式会社 | Laser light source projector |
| US9063401B2 (en) | 2012-04-17 | 2015-06-23 | Mitsubishi Electric Corporation | Laser light source projector |
| CN103376631B (en) * | 2012-04-17 | 2016-04-20 | 三菱电机株式会社 | laser light source projector |
| CN102866571A (en) * | 2012-07-23 | 2013-01-09 | 苏州佳世达光电有限公司 | Light source system |
| CN102866571B (en) * | 2012-07-23 | 2015-04-29 | 苏州佳世达光电有限公司 | Light source system |
| CN104914656A (en) * | 2012-08-06 | 2015-09-16 | 深圳市绎立锐光科技开发有限公司 | Light-emitting device and relevant projection system |
| WO2016041162A1 (en) * | 2014-09-17 | 2016-03-24 | SZ DJI Technology Co., Ltd. | Automatic white balancing system and method |
| US9253460B1 (en) | 2014-09-17 | 2016-02-02 | SZ DJI Technology Co., Ltd. | Automatic white balancing system and method |
| US9743058B2 (en) | 2014-09-17 | 2017-08-22 | SZ DJI Technology Co., Ltd. | Automatic white balancing system and method |
| US9743059B2 (en) | 2014-09-17 | 2017-08-22 | SZ DJI Technology Co., Ltd. | Automatic white balancing system and method |
| CN108205997A (en) * | 2016-12-20 | 2018-06-26 | 日立乐金光科技株式会社 | Laser projection display apparatus |
| CN110088526A (en) * | 2017-03-09 | 2019-08-02 | 宝马股份公司 | Lighting device for motor vehicle |
| CN110088526B (en) * | 2017-03-09 | 2022-02-11 | 宝马股份公司 | Lighting device for a motor vehicle |
| US11543742B2 (en) | 2021-02-09 | 2023-01-03 | Delta Electronics, Inc. | Light source module and projection device |
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Application publication date: 20110921 |