CN101976015A - Projection device and method capable of automatically adjusting projection brightness - Google Patents
Projection device and method capable of automatically adjusting projection brightness Download PDFInfo
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- CN101976015A CN101976015A CN2010105231945A CN201010523194A CN101976015A CN 101976015 A CN101976015 A CN 101976015A CN 2010105231945 A CN2010105231945 A CN 2010105231945A CN 201010523194 A CN201010523194 A CN 201010523194A CN 101976015 A CN101976015 A CN 101976015A
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- light source
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- power supply
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
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Abstract
The invention provides a projection device and method capable of automatically adjusting projection brightness. The projection device comprises a light source, a power supply, a lens module, a light detection unit, a power supply controller and a video display, wherein the power supply is used for supplying power to the light source; the image display is used for receiving most light projected by the light source and projects the picture irradiated by the light source to the lens module; the light detection unit is used for detecting the digital value corresponding to residual light which is from the light source and not received by the video display, and compares the digital value with a preset value to generate a control signal according to the comparison result; and the power supply controller is used for controlling the power supply to adjust the brightness of the light source according to the control signal until the digital value corresponding to residual light coming from the light source reaches the preset value. By using the invention, the projection brightness of the projection device can be adjusted without the loss of effective light of the light source.
Description
Technical field
The present invention relates to a kind of projection arrangement and method with automatic adjustment projection brightness function.
Background technology
Under the prior art, solution at projector projection brightness problem all is to utilize in the projector projection process, obtains the part effective sunlight that light source sends, and handles at this effective sunlight, adjust the brightness of light source according to the result who handles, thereby improve the problem of projector projection brightness.Yet, obtain the part effective sunlight of light source, can directly cause the loss of luminous energy, thus the projection brightness of remote effect projector.
Summary of the invention
Fundamental purpose of the present invention is to provide a kind of projection arrangement and method with automatic adjustment projection brightness function, adjusts the projection brightness of projection arrangement by the light of sensing inactive area, thereby addresses the above problem.
The invention provides a kind of projection arrangement with automatic adjustment projection brightness function, this projection arrangement includes light source, power supply, camera lens module, video display, and this power supply is used for powering to light source; This video display is used to receive most of light that light source projects is come, and will be projected to the camera lens module through the picture of irradiate light; This projection arrangement also comprises: the light detecting unit is used for the digit value of the residual ray correspondence that comes from light source that the detecting image display do not receive, and with itself and a preset value relatively, produces a control signal according to comparative result; Power-supply controller of electric is used for adjusting according to this control signal control power supply the brightness of light source, and the digit value of the residual ray correspondence in coming from light source reaches preset value.
The present invention also provides a kind of projection arrangement with automatic adjustment projection brightness function, this projection arrangement includes three light sources, power supply, camera lens module, this power supply is used for powering to three light sources respectively, this projection arrangement also comprises: three video displays, be used for receiving most of light that corresponding light source projects is come respectively, and will be projected to the camera lens module through the picture of irradiate light; The light detecting unit is used for detecting respectively the digit value of the residual ray correspondence that comes from three light sources that three video displays do not receive, and with itself and corresponding preset value relatively, produces corresponding control signal according to comparative result; Power-supply controller of electric is used for adjusting corresponding light-source brightness according to the corresponding power supply of control signal control of correspondence respectively, and the digit value of the residual ray correspondence in coming from corresponding light source reaches preset value respectively.
The present invention also provides a kind of projection arrangement to adjust the method for projection brightness automatically, this projection arrangement includes light source, power supply, video display, camera lens module, light detecting unit and power-supply controller of electric, and this method may further comprise the steps: the most of light of light source projects is to video display; The digit value of the residual ray correspondence that comes from light source that light detecting unit detecting image display does not receive, and with itself and a preset value relatively, produce a control signal according to comparative result; Light source controller is controlled the brightness that power supply is adjusted light source according to this control signal, and the digit value of the residual ray correspondence in coming from light source reaches preset value.
Electronic installation and method with automatic adjustment projection brightness function of the present invention do not shine light on the image display by optical sensor sensing light source, comes the projection brightness of projection arrangement is adjusted, thereby avoids the loss effective sunlight.
Description of drawings
Fig. 1 is the projection arrangement synoptic diagram with automatic adjustment projection brightness function of the present invention;
Fig. 2 is another synoptic diagram with projection arrangement of automatic adjustment projection brightness function of the present invention;
Fig. 3 is the method flow diagram that projection arrangement of the present invention is adjusted projection brightness automatically.
The main element symbol description
| |
1，1a |
| The |
101 |
| Control die |
80 |
| The |
70 |
| Simulation/ |
81 |
| Comparer | 82 |
| The |
70 |
| |
71 |
| Wave filter | 72 |
| |
60 |
| The |
30 |
| |
40 |
| Power-supply controller of electric | 90 |
| |
20 |
| Light source | 10 |
| The |
50 |
| |
40a |
| Video display 2 | 40b |
| Video display 3 | 40c |
| |
60a |
| Optical sensor 2 | 60b |
| Optical sensor 3 | 60c |
| Close |
100 |
| |
10a |
| Light source 2 | 10b |
| Light source 3 | 10c |
Embodiment
As shown in Figure 1, for having the projection arrangement 1 of automatic adjustment projection brightness function, this projection arrangement 1 comprises a light source 10, a power supply 20, a power-supply controller of electric 90, a total reflection element 30, a video display 40, a light detecting unit 101 and a camera lens module 50.
This light source 10 is used for to total reflection element 30 throw lights.In the present embodiment, this light source 10 can be the LED white light source, LED rgb light source, or the light source of brightness-adjusting such as incandescent lamp bulb.In other embodiments, this light source 10 also can be various light sources such as light emitting diode or laser diode.
This power supply 20 is used for light source 10 is powered, and is luminous with control light source 10.In the present embodiment, the voltage of power supply 20 or power difference can cause the brightness difference of the light that light source sends.
This total reflection element 30 is used for the light that light source 10 is throwed is all reflexed to video display 40.This video display 40 is used for and will be projected to camera lens module 50 through reflecting light-struck picture.Yet, when the light that total reflection element 30 is throwed light source 10 reflexes to video display 40, because the area coverage of the light that total reflection element 30 is reflected generally can be less times greater than the area of video display 40, so can cause having sub-fraction light not to be reflected onto on the video display 40.In other embodiments, this light source 10 also can be without this total reflection element 30, directly with ray cast to video display 40.
This light detecting unit 101 is used to detect the digit value that this total reflection element 30 does not reflex to the sub-fraction light correspondence on the video display 40, and this digit value and a preset value are compared, and produces a control signal according to comparative result.In the present embodiment, this light detecting unit 101 comprises an optical sensor 60, a signal Processing module 70 and a control die set 80.This optical sensor 60 is used for this total reflection element 30 of sensing and does not reflex to sub-fraction light on the video display 40, produces a sensing signal.In the present embodiment, this optical sensor 60 is micro electronmechanical projection arrangement (MEMS, a Micro Electro Mechanical System) optical sensor.
This signal Processing module 70 comprises an amplifier 71 and a wave filter 72.This amplifier 71 is used for the sensing signal that optical sensor 60 is produced is amplified.This wave filter 72 is used for the sensing signal after amplifying is filtered generation one simulating signal.
This control die set 80 comprises a simulation/digital converter 81 and comparer 82.The analog signal conversion that this simulation/digital converter 81 is used for wave filter 72 is produced is a numerical digit signal.This comparer 82 compares this a numerical digit signal and a preset value, produces a control signal according to result relatively.
Power or voltage that the control signal that this power-supply controller of electric 90 is used for being produced according to this light detecting unit 101 is adjusted power supply 20 wait the irradiation brightness of adjusting light source 10, and the digit value of the sub-fraction light correspondence in coming from total reflection element 30 reaches preset value.In the present embodiment, this power-supply controller of electric 90 can be provided with some periodic pulse signals according to width modulation (PWM, Pulse-Width Modulation) and control power supply 20 unlatchings or close light source 10, thus the brightness of the light that control light source 10 is sent.In other embodiments, this power-supply controller of electric 90 also can adopt the mode of stepless light modulation to adjust the intensity of the light that light source 10 sent.
As shown in Figure 2, in another embodiment of the present invention, this projection arrangement 1a includes three light source 10a, 10b, 10c, three video display 40a, 40b, 40c and closes optical element 100.These three video display 40a, 40b, 40c show same image.In the present embodiment, these three light source 10a, 10b, 10c are respectively red light source, green light source and blue-light source.These three light source 10a, 10b, 10c are respectively directly to three video display 40a, 40b, 40c throw light.This closes optical element 100 and is used for three video display 40a, 40b, 40c are throwed next image frame integrator to camera lens module 50.This light detecting unit 101 comprises three optical sensor 60a, 60b, 60c be used for sensing three video display 40a, 40b, 40c respectively next self-corresponding light source 10a that does not receive, the light of 10b, 10c, produces a sensing signal respectively.This signal Processing module 70 amplifies these three sensing signals respectively and filters, and produces simulating signal.This control die set 80 is the numerical digit signal with this analog signal conversion, and respectively these three numerical digit signals and preset value is compared, and produces three control signals according to result relatively.This power-supply controller of electric 90 waits the irradiation brightness of adjusting three light source 10a, 10b, 10c according to the power or the voltage of three control signals adjustment power supplys 20 respectively, and the digit value of the light correspondence in coming from light source 10a, 10b, 10c reaches preset value.In other embodiments, this projection 1a also can include only a video display 40.
As shown in Figure 3, adjust the method flow diagram of projection brightness automatically for projection arrangement of the present invention.
These light source 10 throw lights are to total reflection element 30 (step S701).
The most of light of these total reflection element 30 reflections is to video display 40 (step S702).
This this total reflection element 30 of light detecting unit 101 sensings does not reflex to the digit value of the residual ray correspondence on the video display 40, and this digit value and a preset value are compared, and produces a control signal (step S703) according to comparative result.
Power or voltage that this power-supply controller of electric 90 is adjusted power supply 20 according to this control signal wait the irradiation brightness of adjusting light source 10, and the digit value of residual ray correspondence reaches preset value (step S704) in coming from total reflection element 30.
Claims (9)
1. projection arrangement with automatic adjustment projection brightness function, this projection arrangement includes light source, power supply, camera lens module, video display, and this power supply is used for powering to light source; This video display is used to receive most of light that light source projects is come, and will be projected to the camera lens module through the picture of irradiate light; It is characterized in that: this projection arrangement also comprises:
The light detecting unit is used for the digit value of the residual ray correspondence that comes from light source that the detecting image display do not receive, and with itself and a preset value relatively, produces a control signal according to comparative result;
Power-supply controller of electric is used for adjusting according to this control signal control power supply the brightness of light source, and the digit value of the residual ray correspondence in coming from light source reaches preset value.
2. the projection arrangement with automatic adjustment projection brightness function as claimed in claim 1, it is characterized in that: this projection arrangement also comprises a total reflection element, this total reflection element is used to receive the light that light source projects is come, and most of light is all reflexed to video display.
3. the projection arrangement with automatic adjustment projection brightness function as claimed in claim 1 is characterized in that: this light source is the LED white light source, LED rgb light source, or incandescent lamp bulb.
4. the projection arrangement with automatic adjustment projection brightness function as claimed in claim 1 is characterized in that: this optical sensor is micro electronmechanical projection arrangement optical sensor.
5. projection arrangement with automatic adjustment projection brightness function, it is characterized in that: this projection arrangement includes three light sources, power supply, camera lens module, and this power supply is used for powering to three light sources respectively, and this projection arrangement also comprises:
Three video displays are used for receiving most of light that corresponding light source projects is come respectively, and will be projected to the camera lens module through the picture of irradiate light;
The light detecting unit is used for detecting respectively the digit value of the residual ray correspondence that comes from three light sources that three video displays do not receive, and with itself and corresponding preset value relatively, produces corresponding control signal according to comparative result;
Power-supply controller of electric is used for adjusting corresponding light-source brightness according to the corresponding power supply of control signal control of correspondence respectively, and the digit value of the residual ray correspondence in coming from corresponding light source reaches preset value respectively.
6. the projection arrangement with automatic adjustment projection brightness function as claimed in claim 5 is characterized in that: these three light sources are respectively red light source, green light source and blue-light source.
7. the projection arrangement with automatic adjustment projection brightness function as claimed in claim 5, it is characterized in that: this projection arrangement also comprises and closes optical element, and this closes optical element and is used for that three video displays are throwed the image that comes respectively and synthesizes one and be projected to the camera lens module.
8. a projection arrangement is adjusted the method for projection brightness automatically, and this projection arrangement includes light source, power supply, video display, camera lens module, light detecting unit and power-supply controller of electric, it is characterized in that, this method may further comprise the steps:
The most of light of light source projects is to video display;
The digit value of the residual ray correspondence that comes from light source that light detecting unit detecting image display does not receive, and with itself and a preset value relatively, produce a control signal according to comparative result;
Light source controller is controlled the brightness that power supply is adjusted light source according to this control signal, and the digit value of the residual ray correspondence in coming from light source reaches preset value.
9. projection arrangement as claimed in claim 8 is adjusted the method for projection brightness automatically, it is characterized in that: this projection arrangement also comprises a total reflection element, and this method also comprises step:
The total reflection element receives the light that comes from light source, and most of light is all reflexed to video display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105231945A CN101976015A (en) | 2010-10-28 | 2010-10-28 | Projection device and method capable of automatically adjusting projection brightness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105231945A CN101976015A (en) | 2010-10-28 | 2010-10-28 | Projection device and method capable of automatically adjusting projection brightness |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101976015A true CN101976015A (en) | 2011-02-16 |
Family
ID=43575909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105231945A Pending CN101976015A (en) | 2010-10-28 | 2010-10-28 | Projection device and method capable of automatically adjusting projection brightness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101976015A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102499615A (en) * | 2011-09-26 | 2012-06-20 | 首都医科大学 | Illuminating light source device and sampling and controlling method |
| CN102854722A (en) * | 2011-07-01 | 2013-01-02 | 中强光电股份有限公司 | Projection device and light source adjusting method thereof |
| CN102890395A (en) * | 2012-09-26 | 2013-01-23 | 惠州市华阳多媒体电子有限公司 | Dimming control method and device |
| CN104880890A (en) * | 2014-02-27 | 2015-09-02 | 中强光电股份有限公司 | Projection device and brightness adjusting method thereof |
| CN105282902A (en) * | 2014-06-20 | 2016-01-27 | 宁波舜宇光电信息有限公司 | Led light source control method |
| CN113805409A (en) * | 2020-05-29 | 2021-12-17 | 英錡科技股份有限公司 | Projection device |
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| CN1916691A (en) * | 2005-08-15 | 2007-02-21 | 明基电通股份有限公司 | Projection device and method for adjusting brightness of light source |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102854722A (en) * | 2011-07-01 | 2013-01-02 | 中强光电股份有限公司 | Projection device and light source adjusting method thereof |
| US8820941B2 (en) | 2011-07-01 | 2014-09-02 | Coretronic Corporation | Projection apparatus and light source adjusting method thereof |
| CN102854722B (en) * | 2011-07-01 | 2015-04-22 | 中强光电股份有限公司 | Projection device and light source adjustment method thereof |
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| CN102890395A (en) * | 2012-09-26 | 2013-01-23 | 惠州市华阳多媒体电子有限公司 | Dimming control method and device |
| CN102890395B (en) * | 2012-09-26 | 2014-12-31 | 惠州市华阳多媒体电子有限公司 | Dimming control method and device |
| CN104880890A (en) * | 2014-02-27 | 2015-09-02 | 中强光电股份有限公司 | Projection device and brightness adjusting method thereof |
| US9500940B2 (en) | 2014-02-27 | 2016-11-22 | Coretronic Corporation | Projector and brightness adjusting method thereof |
| CN105282902A (en) * | 2014-06-20 | 2016-01-27 | 宁波舜宇光电信息有限公司 | Led light source control method |
| CN113805409A (en) * | 2020-05-29 | 2021-12-17 | 英錡科技股份有限公司 | Projection device |
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Application publication date: 20110216 |