CN1916691A - Projecting unit, and method for adjusting brightness of light source - Google Patents
Projecting unit, and method for adjusting brightness of light source Download PDFInfo
- Publication number
- CN1916691A CN1916691A CN 200510091977 CN200510091977A CN1916691A CN 1916691 A CN1916691 A CN 1916691A CN 200510091977 CN200510091977 CN 200510091977 CN 200510091977 A CN200510091977 A CN 200510091977A CN 1916691 A CN1916691 A CN 1916691A
- Authority
- CN
- China
- Prior art keywords
- light beam
- module
- light
- projection arrangement
- brightness
- 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
A projection device consists of light source module used to generate the first light beam, reflection module for receiving the first light beam and for reflecting the first light beam to be the second one as well as for forming the third one by passing partial light of the first reflection light beam through reflection module, projecting the second one to form an image by imaging module, sensing brightness of the third one by light transducer in order to output a sensing signal, outputting a control signal according to said sensing signal and controlling light source module to make the first light beam retain on a fixed brightness by control unit.
Description
Technical field
The present invention relates to a kind of projection arrangement, particularly relate to a kind of projection arrangement that can adjust light-source brightness automatically.
Background technology
In the environment that this projector more and more popularizes, no matter be in the meeting bulletin of office, or in family's theater of individual, indispensable role is all playing the part of in projector.Therefore, how to improve the quality of projector, become more and more important problem.
Please refer to Fig. 1, it illustrates the synoptic diagram into traditional projection arrangement.Tradition projection arrangement 100 comprises light source module 110, reflecting module 120, image module 150 and image-forming module 160.Light source module 100 is in order to produce a light L, and light source module 110 for example is to use bulb (Lamp) luminous.Light L reflexes to image module 150 through reflecting module 120, and reflecting module 120 for example is a catoptron, image module 150 for example be a digital micromirror elements (Digital Micro-mirror Device, DMD).Light L sees through image-forming module 160 at last image is projected on the screen 170 through behind the image module 150, and image-forming module 160 for example is a camera lens.
Yet, whether the brightness power of tradition projection arrangement 100, depends on the light L that light source module 110 is produced, when light source module 110 decay aging (Decay), with make traditional projection arrangement 100 brightness with decline, be projected on the screen 170 image quality and have influence on.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of projection arrangement and method for adjusting brightness of light source thereof.By the light of sensing penetrate through reflective module, the control light luminance that light source module produced maintains under the constant brightness projection arrangement and works.
According to first purpose of the present invention, a kind of projection arrangement is proposed, comprise light source module, reflecting module, image-forming module, optical sensor and control module.Light source module is in order to produce first light beam.Reflecting module is in order to receiving first light beam, and with a part of light of first light beam after the reflecting module reflection forming one second light beam, and another part light penetration reflecting module of first light beam is to form one the 3rd light beam.Image-forming module forms an image with the projection of second light beam.Optical sensor is in order to the brightness of sensing the 3rd light beam, to export a sensing signal.Control module is in order to export a control signal according to sensing signal, the control light source module is so that first light beam keeps a constant brightness.
According to second purpose of the present invention, another kind of projection arrangement is proposed, comprise bulb, catoptron, image-forming module, optical sensor and control module.Bulb is in order to produce one first light beam.Catoptron is in order to receiving first light beam, and with a part of light of first light beam after mirror reflects forming one second light beam, and another part light penetration catoptron of first light beam is to form one the 3rd light beam.Image-forming module forms an image with the projection of second light beam.Optical sensor is arranged at the rear side of catoptron, in order to according to the brightness of the 3rd light beam to export a sensing signal.Control module is in order to export a control signal according to sensing signal, the control light source module is so that first light beam keeps a constant brightness.
According to second purpose of the present invention, a kind of method for adjusting brightness of light source is proposed.Method for adjusting brightness of light source is used in a projection arrangement, and projection arrangement comprises light source module, image-forming module and reflecting module, and light source module is in order to produce a light beam, the light beam that reflecting module is produced in order to the reflection source module.Method for adjusting brightness of light source comprises the steps: at first, utilizes the light beam of reflecting module antireflection part, and image-forming module also forms an image with the projection of the light beam of reflecting part.Then, detect light beam, and produce a sensing signal according to this via reflecting module transmission another part.At last, according to sensing signal, the control light source module is kept a constant brightness.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent, a preferred embodiment cited below particularly, and cooperate appended graphicly, be described in detail below:
Description of drawings
Fig. 1 is the synoptic diagram of traditional projection arrangement;
Fig. 2 is a kind of synoptic diagram that can adjust the projection arrangement of brightness automatically of a preferred embodiment of the present invention;
Fig. 3 is the process flow diagram according to a preferred embodiment of the present invention projection arrangement method for adjusting brightness of light source.
Embodiment
Projection arrangement utilizes light source module to produce required light-source brightness.Light source module comprises bulb and electric stabilizer (Ballast), and electric stabilizer drives bulb and produces the light of required brightness, when bulb decay aging (Decay), the brightness of projection arrangement will with decline.Therefore when light-source brightness descended with the bulb decay is aging, if projection arrangement was can be according to the change of light-source brightness, and the output power of control electric stabilizer makes projection arrangement maintain work under the desirable brightness, and projection arrangement will have better image performance.
Please refer to Fig. 2, it illustrates a kind of projection arrangement synoptic diagram that can adjust brightness automatically according to a preferred embodiment of the present invention.Automatically the projection arrangement 200 of adjusting brightness comprises light source module 210, reflecting module 220, optical sensor 230, control module 240, image module 250 and image-forming module 260.Light source module 210 produces the first light beam L1.After reflecting module 220 received the first light beam L1, a part of light of the first light beam L1 reflected to form the second light beam L2 through reflecting module 220.Another part light penetration reflecting module 220 of the first light beam L1 is to form the 3rd light beam L3.The brightness of optical sensor 230 sensings the 3rd light beam L3 is with output sensing signal S1.Control module 240 maintains a constant brightness according to sensing signal S1 output control signal S3 with the first light beam L1 brightness of controlling light source module 210.
Furthermore, light source module 210 comprises electric stabilizer 212 and bulb 214.Electric stabilizer 212 drives bulb 214 to send the first light beam L1.The most light of reflecting module 220 (illustrating) the reflection first light beam L1, and the light of the transmission first light beam L1 small part as Fig. 2.Reflecting module 220 comprises catoptron 222, and reflecting module 220 is not limited to use a catoptron 222, and a plurality of catoptrons 222 are used in the design of projection arrangement 200 visual light paths.The reflectivity of catoptron 222 for example be 99.8% and its penetrance for example be 0.2%.Behind the first light beam L1 incidence reflection mirror 222, via the most of light of the reflection of catoptron 222, to form the second light beam L2.The second light beam L2 sees through image-forming module 260 again image is projected on the screen 270 after an image module 250 reflexes to image-forming module 260, and image module 250 for example is a digital micromirror elements, and image-forming module 260 for example is a camera lens.
Behind the first light beam L1 incidence reflection mirror 222, via catoptron 222 transmission small part light, to form the 3rd light beam L3.Projection arrangement 200 descends in order to prevent the aging brightness that is caused of bulb 214 decay, at the rear side of catoptron 222 optical sensor 230 is set.If when using a plurality of catoptron 222, optical sensor 230 can select to be arranged at one of them rear side of a plurality of catoptron 222.Optical sensor 230 is in order to sensing the 3rd light beam L3, and according to the strong and weak output of the brightness one sensing signal S1 of the 3rd light beam L3.
Please refer to Fig. 3, it illustrates and is the process flow diagram according to preferred embodiment projection arrangement method for adjusting brightness of light source of the present invention.As mentioned above, the light source module 210 of projection arrangement 200 is in order to produce the first light beam L1.Method for adjusting brightness of light source comprises the steps: at first that shown in step 31 the first light beam L1 that utilizes reflecting module 220 antireflection parts is to form the second light beam L2, and image-forming module 260 forms image with second light beam L2 projection.And then shown in step 32, detect the three light beam L3 of the first light beam L1 after reflecting module 220 transmissions, and produce sensing signal S1 according to this.Then shown in step 33, utilize the analog-digital converter 242 of above-mentioned control module 240 that sensing signal S1 is converted to digital signal S2.Shown in step 34, utilize the 244 couples of digital signal S2 of comparer and the default value Sp of above-mentioned control module 240 to make comparisons, and control signal S3 is provided according to this at last, keep constant brightness with control light source module 210.
For instance, initial control module 240 output control signal S3 are the voltage of 5V, and the output power that 212 outputs of control electric stabilizer are 100 watts is sent the first light beam L1 that light-source brightness is 1000 lumens (constant brightness) to drive bulb 214.Yet, aging when bulb 214 decay of light source module 210, make that the light-source brightness of the first light beam L1 drops to only 800 lumens under the same power of electric stabilizer 212 outputs.Just can utilize control module 240 this moment, the result that digital signal S2 that (brightness of corresponding 800 lumens) are changed according to sensing signal S1 and default value Sp make comparisons (for example being the difference of digital signal S2 value and default value Sp), the magnitude of voltage of being exported is increased to 6V, with the output power of 120 watts of control electric stabilizer 212 outputs.If adjust light-source brightness later still less than 1000 predetermined lumens, then continuing to improve output voltage values is 7V; If adjust light-source brightness later greater than 1000 predetermined lumens, then reducing output voltage values is 5.5V, and with this quadratic approximation method, just the first light beam L1 that can gradually bulb 214 be sent maintains the light-source brightness of 1000 lumens.Thus, projection arrangement 200 will have better image performance.
Disclosed projection arrangement of the above embodiment of the present invention and method for adjusting brightness of light source thereof, can utilize the brightness of light sensors penetrate through reflective mirror small part light, to adjust the output power of electric stabilizer, when even the bulb of feasible light source module is aging, projection arrangement still can be automatically be adjusted to the brightness of light source module to maintain under the constant brightness works, and improves the serviceable life of projection arrangement effectively.
In sum; though disclosed the present invention in conjunction with an above preferred embodiment; yet it is not in order to limit the present invention; anyly be familiar with this operator; without departing from the spirit and scope of the present invention; can be used for a variety of modifications and variations, so protection scope of the present invention should be with being as the criterion that claim was defined.
Claims (7)
1. projection arrangement comprises:
One light source module is in order to produce one first light beam;
One reflecting module, in order to receiving this first light beam, and with a part of light of this first light beam after this reflecting module reflection forming one second light beam, and this reflecting module of another part light penetration of this first light beam is to form one the 3rd light beam;
One image-forming module is in order to form an image with this second light beam projection;
One optical sensor is in order to the brightness of sensing the 3rd light beam, to export a sensing signal; And
One control module in order to export a control signal according to this sensing signal, is controlled this light source module so that this first light beam keeps a constant brightness.
2. projection arrangement as claimed in claim 1, wherein this control module comprises:
One analog-digital converter is in order to be converted to this sensing signal the output of one digital signal; And
One comparer has a default value that should constant brightness, and this comparer is with this digital signal and this default value this control signal of back output relatively.
3. projection arrangement as claimed in claim 1, wherein this reflecting module comprises a catoptron, and after this this reflecting module of first light beam incident, via the transmission of this catoptron, to form the 3rd light beam.
4. projection arrangement as claimed in claim 3, wherein the reflectivity of this catoptron is 99.8%, the penetrance of this catoptron is 0.2%.
5. projection arrangement as claimed in claim 3, wherein this optical sensor is arranged at the rear side of this catoptron.
6. projection arrangement as claimed in claim 1, wherein this projection arrangement is a pre-projecting type projector.
7. projection arrangement as claimed in claim 1, wherein this projection arrangement is a back projection type projection TV.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510091977 CN1916691A (en) | 2005-08-15 | 2005-08-15 | Projecting unit, and method for adjusting brightness of light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510091977 CN1916691A (en) | 2005-08-15 | 2005-08-15 | Projecting unit, and method for adjusting brightness of light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1916691A true CN1916691A (en) | 2007-02-21 |
Family
ID=37737714
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200510091977 Pending CN1916691A (en) | 2005-08-15 | 2005-08-15 | Projecting unit, and method for adjusting brightness of light source |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1916691A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010149027A1 (en) * | 2009-06-22 | 2010-12-29 | Industrial Technology Research Institute | Light-emitting unit array, method for fabricating the same and projection apparatus |
| CN101976015A (en) * | 2010-10-28 | 2011-02-16 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
| CN102012614A (en) * | 2010-10-28 | 2011-04-13 | 鸿富锦精密工业（深圳）有限公司 | Projection device with function of automatically adjusting projection brightness and method |
| CN102073203A (en) * | 2010-11-17 | 2011-05-25 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
| CN102072766A (en) * | 2010-12-14 | 2011-05-25 | 广东威创视讯科技股份有限公司 | Device and method for detecting brightness decay degree of bulb of projector |
| CN101742192B (en) * | 2009-12-25 | 2011-11-02 | 深圳雅图数字视频技术有限公司 | Projection imaging system and imaging method for controlling projection brightness according to optical channel brightness |
| CN102316330A (en) * | 2010-07-02 | 2012-01-11 | 宏碁股份有限公司 | Digital light processing projector and color compensation method for lamp bulb thereof |
| CN102478753A (en) * | 2010-11-22 | 2012-05-30 | 台达电子工业股份有限公司 | Projection device, light source module for projection device and brightness adjusting method |
| CN102499615A (en) * | 2011-09-26 | 2012-06-20 | 首都医科大学 | Illuminating light source device and sampling and controlling method |
| CN102955341A (en) * | 2011-08-25 | 2013-03-06 | 中强光电股份有限公司 | Projection device and brightness adjustment method thereof |
| US8523361B2 (en) | 2010-10-27 | 2013-09-03 | Hon Hai Precision Industry Co., Ltd. | Projection device with brightness adjustment function and method thereof |
| CN104880890A (en) * | 2014-02-27 | 2015-09-02 | 中强光电股份有限公司 | Projection apparatus and brightness modulating method thereof |
| CN109672877A (en) * | 2018-11-21 | 2019-04-23 | 惠州市华阳多媒体电子有限公司 | A kind of vehicle-mounted line holographic projections component and its system of enhancing display |
| WO2023071548A1 (en) * | 2021-10-29 | 2023-05-04 | 华为技术有限公司 | Optical display apparatus, display system, vehicle, and color adjustment method |
-
2005
- 2005-08-15 CN CN 200510091977 patent/CN1916691A/en active Pending
Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102341740B (en) * | 2009-06-22 | 2015-09-16 | 财团法人工业技术研究院 | Array of light emitting cells, its manufacture method and projector equipment |
| CN102341740A (en) * | 2009-06-22 | 2012-02-01 | 财团法人工业技术研究院 | Light-emitting unit array, method for fabricating the same and projection apparatus |
| US8573784B2 (en) | 2009-06-22 | 2013-11-05 | Industrial Technology Research Institute | Imaging apparatus having an optical sensor |
| WO2010149027A1 (en) * | 2009-06-22 | 2010-12-29 | Industrial Technology Research Institute | Light-emitting unit array, method for fabricating the same and projection apparatus |
| CN101742192B (en) * | 2009-12-25 | 2011-11-02 | 深圳雅图数字视频技术有限公司 | Projection imaging system and imaging method for controlling projection brightness according to optical channel brightness |
| CN102316330A (en) * | 2010-07-02 | 2012-01-11 | 宏碁股份有限公司 | Digital light processing projector and color compensation method for lamp bulb thereof |
| US8523361B2 (en) | 2010-10-27 | 2013-09-03 | Hon Hai Precision Industry Co., Ltd. | Projection device with brightness adjustment function and method thereof |
| CN101976015A (en) * | 2010-10-28 | 2011-02-16 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
| CN102012614A (en) * | 2010-10-28 | 2011-04-13 | 鸿富锦精密工业（深圳）有限公司 | Projection device with function of automatically adjusting projection brightness and method |
| CN102073203A (en) * | 2010-11-17 | 2011-05-25 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
| CN102478753A (en) * | 2010-11-22 | 2012-05-30 | 台达电子工业股份有限公司 | Projection device, light source module for projection device and brightness adjusting method |
| CN102072766B (en) * | 2010-12-14 | 2012-12-26 | 广东威创视讯科技股份有限公司 | Device and method for detecting brightness decay degree of bulb of projector |
| CN102072766A (en) * | 2010-12-14 | 2011-05-25 | 广东威创视讯科技股份有限公司 | Device and method for detecting brightness decay degree of bulb of projector |
| CN102955341A (en) * | 2011-08-25 | 2013-03-06 | 中强光电股份有限公司 | Projection device and brightness adjustment method thereof |
| CN102955341B (en) * | 2011-08-25 | 2015-03-11 | 中强光电股份有限公司 | Projection device and brightness adjustment method thereof |
| CN102499615A (en) * | 2011-09-26 | 2012-06-20 | 首都医科大学 | Illuminating light source device and sampling and controlling method |
| CN104880890A (en) * | 2014-02-27 | 2015-09-02 | 中强光电股份有限公司 | Projection apparatus and brightness modulating method thereof |
| US9500940B2 (en) | 2014-02-27 | 2016-11-22 | Coretronic Corporation | Projector and brightness adjusting method thereof |
| CN109672877A (en) * | 2018-11-21 | 2019-04-23 | 惠州市华阳多媒体电子有限公司 | A kind of vehicle-mounted line holographic projections component and its system of enhancing display |
| WO2023071548A1 (en) * | 2021-10-29 | 2023-05-04 | 华为技术有限公司 | Optical display apparatus, display system, vehicle, and color adjustment method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1916691A (en) | Projecting unit, and method for adjusting brightness of light source | |
| US6733137B2 (en) | Digital mirror device projector and method of correcting video signal being used in digital mirror device projector | |
| US6628248B2 (en) | Image display apparatus and method for compensating display image of image display apparatus | |
| JP4345745B2 (en) | Multi-projection display | |
| US7532259B2 (en) | Dynamic aperture for a light processing system | |
| US7841725B2 (en) | Image display device and projector | |
| US20050264762A1 (en) | Method and apparatus to enhance contrast ratio in projection system | |
| KR20070076338A (en) | Image display equipment and control method thereof | |
| JP4670641B2 (en) | Rear projection type multi-projection display | |
| US20070030684A1 (en) | Projecting apparatus and luminance adjusting method thereof | |
| JP2005003744A (en) | Projection type picture display device | |
| JPH0448860A (en) | Dynamic range adjustment device for image scanner | |
| CN1693985A (en) | Reflective optical assembly | |
| US7825362B2 (en) | Projection device having a lens adjusting unit adjusting a focus of an adjustable collimator according to the distance between a light source and the adjustable collimator | |
| JP5092207B2 (en) | Image display device and image display method | |
| CN1898598A (en) | Projection system | |
| WO2006110427A2 (en) | Method and apparatus for an image presentation device with illumination control for black image processing | |
| WO2019140786A1 (en) | Projector-based control method and projector | |
| JP2008233487A (en) | Light source controller | |
| WO2006055932A2 (en) | System and method for light source modulation | |
| US20060001893A1 (en) | Display device and image processing method therefor | |
| US11143944B2 (en) | Projection device and calibration method thereof | |
| US20230418140A1 (en) | Infrared light source module and projection device | |
| KR101873748B1 (en) | A projector and a method of processing an image thereof | |
| JP2007158460A (en) | Video projection apparatus and method |
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 |