CN102333398A - Optical imaging apparatus and temperature control method of light emitting diode module thereof - Google Patents
Optical imaging apparatus and temperature control method of light emitting diode module thereof Download PDFInfo
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- CN102333398A CN102333398A CN2010102274934A CN201010227493A CN102333398A CN 102333398 A CN102333398 A CN 102333398A CN 2010102274934 A CN2010102274934 A CN 2010102274934A CN 201010227493 A CN201010227493 A CN 201010227493A CN 102333398 A CN102333398 A CN 102333398A
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Abstract
The invention provides an optical imaging apparatus and a temperature control method of a light emitting diode module thereof. The light emitting diode module has a plurality of light emitting diode units that respectively generate a plurality of basic color lights. The temperature control method comprises the following steps that: a working temperature of a light emitting diode module is detected; and according to the working temperature and a black body radiator curve of a color coordinate graph, wherein the black body radiator curve is formed by the basic color lights, a plurality of driving signals that are provided for light emitting diode units are adjusted so as to reduce a color temperature of at least one of the basic color lights.
Description
Technical field
The present invention relates to the temperature-controlled process of a kind of optical imaging device and light emitting diode module thereof, relate in particular to the temperature-controlled process that a kind of optical imaging device reaches the light emitting diode module of carrying out through the adjustment colour temperature.
Background technology
Along with the enhancing of environmental consciousness, under the demand of green energy resource, utilize light emitting diode module increasingly high as the demand of the light emitting source of electronic installation.With the projector is example, and projector has now utilized the luminous mode of light-emitting diode sequence of red, green and blue light, and (Digital Micromirror Device DMD) reflexes to the color that meets image on the cloth curtain and forms images through DMD again.And in this projector, can have Temperature Detector to detect the working temperature in the projector by device usually.And be unlikely to too high in order to ensure the working temperature in the projector, so-called radiator fan can be set in the existing projector usually come the Control work temperature.
Above-mentioned existing projector, the normal rotating speed that improves radiator fan for the working temperature that effectively reduces projector.Such control mode not only can make the power consumption that acts on radiator fan to increase, and is relative, and the quick rotation of radiator fan also can produce does not hope the noise that occurs.These promote the performance that the negative effect that is caused can reduce system because of radiating fan rotation speed, are not a kind of good selection.
Summary of the invention
The present invention provides a kind of temperature-controlled process of light emitting diode module, effectively reduces the working temperature of light emitting diode module.
The present invention provides a kind of optical imaging device, effectively reduces the working temperature as the light emitting diode module of light emitting source.
The present invention provides a kind of temperature-controlled process of light emitting diode module; Light emitting diode module wherein has a plurality of light emitting diodes and produces a plurality of basic coloured light respectively; Comprise: at first; Detect the working temperature of light emitting diode module, and, a plurality of drive signals of offering light emitting diode adjusted according to the black body radiation line of working temperature and the chromaticity coordinates figure that basic coloured light constituted to reduce in the basic coloured light colour temperature of one of them at least.
In one embodiment of this invention, above-mentioned this black body radiation line according to this working temperature and the chromaticity coordinates figure that said basic coloured light constituted is adjusted a plurality of drive signals of offering said light emitting diode the step of the colour temperature of one of them is comprised to reduce in the said basic coloured light at least: set up colour temperature adjustment look-up table according to the black body radiation line of the chromaticity coordinates figure that basic coloured light was constituted.When working temperature during, adjust the drive signal that offers light emitting diode according to colour temperature adjustment look-up table to reduce in the basic coloured light colour temperature of one of them at least greater than design temperature.
In one embodiment of this invention, above-mentioned basic coloured light is red light, green light and blue light.
In one embodiment of this invention; The above-mentioned drive signal that offers light emitting diode adjusted according to working temperature and this body radiation is when reducing in the said basic coloured light at least the colour temperature of one of them; Adjust the colour temperature of red light in advance; Adjust the colour temperature of green light again, adjust the colour temperature of blue light at last.
In one embodiment of this invention, above-mentioned temperature-controlled process also comprises through starting radiator fan reduction working temperature.
The present invention provides a kind of optical imaging device, comprises light emitting source, Temperature Detector and controller.Light emitting source is made up of light emitting diode module, and light emitting diode module has a plurality of light emitting diodes and produces a plurality of basic coloured light respectively.Temperature Detector is then in order to detect the working temperature of light emitting diode module.Controller connects light emitting source and Temperature Detector, adjusts a plurality of drive signals of offering light emitting diode according to the black body radiation line of working temperature and the chromaticity coordinates figure that basic coloured light constituted to reduce in the basic coloured light colour temperature of one of them at least.
Based on above-mentioned, the present invention adjusts a plurality of drive signals of offering light emitting diode to reduce in the basic coloured light colour temperature of one of them at least according to the black body radiation line when the working temperature of light emitting diode module is too high.Do not influence eye-observation under the vicissitudinous situation of the luminosity of light-emitting diode, reducing the consumption of power, and then downgrading the working temperature of light emitting diode module.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and conjunction with figs. elaborates as follows.
Description of drawings
Fig. 1 is the flow chart of temperature-controlled process of the light emitting diode module of the embodiment of the invention.
Fig. 2 is CIE chromaticity coordinates Figure 200 of the embodiment of the invention.
Fig. 3 is the sketch map of the optical imaging device 300 of another embodiment of the present invention.
Main description of reference numerals:
S110～S120: temperature controlling step; 200:CIE chromaticity coordinates figure;
210: the black body radiation line; 300: optical imaging device;
310: controller; 320: light emitting source;
330: Temperature Detector; 340: radiator fan;
350: memory.
Embodiment
At first please with reference to Fig. 1, Fig. 1 is the flow chart of temperature-controlled process of the light emitting diode module of the embodiment of the invention.Wherein, light emitting diode module has a plurality of light emitting diodes, and these light emitting diodes produce a plurality of different basic coloured light respectively.For instance, included a plurality of light emitting diodes can be divided into three types in the light emitting diode module, and wherein one type is used for sending first kind of basic coloured light (for example being red light), another kind ofly then are used for sending second kind of basic coloured light (for example being green light).Last type then is used for sending the third basic coloured light (for example being blue light).The temperature-controlled process step of the embodiment of the invention then comprises: at first, detect the working temperature (S110) of light emitting diode module.This mode that detects the working temperature of light-emitting diode can reach through a kind of device of so-called Temperature Detector (not shown).This Temperature Detector only need be configured in respect to one of light emitting diode module suitable position and get final product.And the relevant technology of utilizing Temperature Detector to detect the working temperature of light emitting diode module is well known to those skilled in the art, and does not give unnecessary details at this.
After the working temperature that has obtained light emitting diode module, then adjust a plurality of drive signals of offering light emitting diode to reduce in a little basic coloured light the colour temperature (S120) of one of them at least according to the black body radiation line of working temperature and CIE (Intemational Commission on Illumination) the chromaticity coordinates figure that basic coloured light constituted.More specifically explain, when the working temperature of light emitting diode module rises to above design temperature along with the operating time, then start the colour temperature of the adjustment basic coloured light that light emitting diode sent.At this, the colour temperature that is not all basic coloured light all must be adjusted by synchronous quilt, only need carry out the colour temperature adjustment to a kind of in the basic coloured light sometimes, then must be directed against multiple adjustment the in the basic coloured light sometimes.Note that at this and therefore, in the colour temperature that downgrades the light that light emitting diode module sends, can't reduce the luminosity that the user experiences because the user is comparatively bright for the visual experience of the light of cool colour temperature.
In an embodiment of the present invention, when basic coloured light is carried out the adjustment of colour temperature, can adjust earlier higher color temperature a plurality of basic coloured light at least one of them, last just adjust to the basic coloured light of cool colour temperature.Think that red light, green light and blue light are that basic coloured light is example; When carrying out the colour temperature adjustment of basic coloured light; The colour temperature of one of them at least can be turned down in red light or the green light earlier,, the colour temperature of adjusting blue light can be go again if when working temperature is not lower than design temperature yet.
Be the more easy colour temperature adjustment that realizes above-mentioned basic coloured light, can set up the foundation that a colour temperature adjustment look-up table is used as the colour temperature adjustment in advance.Below please adjust an execution mode of look-up table with reference to the colour temperature shown in the table 1:
Table 1
| Colour temperature | Red light | Green light | Blue light |
| Normal value | 1.00 | 1.00 | 1.00 |
| CT1 | 0.97 | 0.97 | 1.00 |
| CT2 | 0.94 | 0.94 | 0.99 |
| CT3 | 0.91 | 0.91 | 0.99 |
| CT4 | 0.88 | 0.88 | 0.98 |
| CT5 | 0.85 | 0.85 | 0.98 |
In the execution mode of table 1, when working temperature surpasses design temperature, can select the setting of CT1 to adjust earlier.The colour temperature of just turning down red light and green light is 0.97 (97%) of a normal value, to turn down working temperature.If after the adjustment of having carried out according to the setting of CT1, when working temperature still surpasses design temperature, then can select for use the setting of CT2 to adjust.The colour temperature of just turning down red light and green light be normal value 0.94 (94%) to turn down working temperature.The rest may be inferred, and the colour temperature that can downgrade red light and green light according to table 1 at most according to the setting of CT5 is 0.85 (85%) of a normal value, and the colour temperature of turning down blue light is 0.98 (98%) of a normal value.
In addition, also please adjust another execution mode of look-up table with reference to the colour temperature shown in the table 2:
Table 2
| Colour temperature | Red light | Green light | Blue light |
| Normal value | 1.00 | 1.00 | 1.00 |
| CT1 | 0.96 | 0.96 | 1.00 |
| CT2 | 0.94 | 0.93 | 0.99 |
| CT3 | 0.91 | 0.89 | 0.99 |
| CT4 | 0.88 | 0.85 | 0.99 |
| CT5 | 0.85 | 0.82 | 0.98 |
In the execution mode of table 2, the degree of the colour temperature of red light and green light adjustment is also inequality.Wherein, in the setting of the colour temperature of green light CT2～CT5 in table 2, adjustable colour temperature adjustment degree than red light is high.
At this colour temperature adjustment look-up table that note that above-mentioned different execution modes about table 1 and table 2 all is to set up according to the black body radiation line on the CIE chromaticity coordinates figure that basic coloured light demonstrated of light emitting diode module.Please with reference to Fig. 2, Fig. 2 is CIE chromaticity coordinates Figure 200 of the embodiment of the invention at this.Wherein, the colour temperature of basic coloured light adjustment look-up table is to set up according to the black body radiation line 210 among CIE chromaticity coordinates Figure 200 (black body radidator curve).And the colour temperature of basic coloured light adjustment result must let white spot color temperature drop on the black body radiation line 210 between 6500K～7500K.Thus, just do not have the problem generation of colour cast through the image that light emitting diode module appeared.
Subsidiary one carries, and the colour temperature of adjusting basic coloured light is to reach through the drive signal that adjustment produces the light emitting diode of controlled basic coloured light.In simple terms, when turning down the colour temperature of red light, can reach through the drive signal that the light emitting diode of red light is sent in adjustment.This drive signal is generally drive current or driving voltage.And the technology that the adjustment mode of this drive current and driving voltage is well known to those skilled in the art is seldom given unnecessary details at this.
In addition, the temperature-controlled process of the embodiment of the invention can also cooperate the heat dissipating method of existing radiator fan, more to promote the control ability of working temperature.
Below please with reference to Fig. 3, Fig. 3 is the sketch map of the optical imaging device 300 of another embodiment of the present invention.Optical imaging device 300 for example is a projector, comprising controller 310, light emitting source 320, Temperature Detector 330 and radiator fan 340.Wherein, controller 310 connects light emitting source 320, Temperature Detector 330 and radiator fan 340.And light emitting source 320 is to be made up of light emitting diode module, and this light emitting diode module has a plurality of light emitting diodes and produces a plurality of basic coloured light respectively.
About in the basic coloured light of controller 310 adjustment at least the method for the colour temperature of one of them in the embodiment of aforesaid temperature-controlled process of the present invention all with detailed explanation, below repeat no more.And about colour temperature adjustment look-up table can in be built in the controller 310, also can exist in the memory 350 and be connected with controller 310 with plug-in mode, read for controller 310.
In sum, the present invention utilizes in the basic coloured light of adjustment at least the colour temperature of one of them to come under the situation that does not influence user's visual experience, reduces the working temperature of light emitting diode module.Effectively provide light emitting diode module another temperature controlled mode, under the situation of rotating speed that does not need significantly to increase radiator fan and consumed power, more effective reduction working temperature, make may emergent power consumption and the noise phenomenon effectively reduce.
Though the present invention discloses as above with embodiment; But it is not in order to limit the present invention; Person skilled under any; Do not breaking away from the spirit and scope of the present invention, can change arbitrarily or be equal to replacement, so protection scope of the present invention is as the criterion when the scope that defined with the application's claim.
Claims (10)
1. the temperature-controlled process of a light emitting diode module, this light emitting diode module have a plurality of light emitting diodes and produce a plurality of basic coloured light respectively, comprising:
Detect a working temperature of this light emitting diode module;
Adjust a plurality of drive signals of offering said light emitting diode according to the black body radiation line of this working temperature and the chromaticity coordinates figure that said basic coloured light constituted to reduce in the said basic coloured light colour temperature of one of them at least.
2. temperature-controlled process according to claim 1, wherein said this black body radiation line according to this working temperature and the chromaticity coordinates figure that said basic coloured light constituted are adjusted a plurality of drive signals of offering said light emitting diode, and the step of the colour temperature of one of them comprises to reduce in the said basic coloured light at least:
Set up colour temperature adjustment look-up table according to this black body radiation line of the chromaticity coordinates figure that said basic coloured light constituted;
And
When this working temperature during, adjust the said drive signal that offers said light emitting diode according to this colour temperature adjustment look-up table to reduce in the said basic coloured light colour temperature of one of them at least greater than a design temperature.
3. temperature-controlled process according to claim 1, wherein said basic coloured light are a red light, a green light and a blue light.
4. temperature-controlled process according to claim 3; Wherein adjust the said drive signal that offers said light emitting diode when reducing in the said basic coloured light at least the colour temperature of one of them according to this working temperature and this black body radiation line; Adjust in advance this red light colour temperature or this green light colour temperature at least one of them, adjust the colour temperature of this blue light at last.
5. temperature-controlled process according to claim 1 wherein also comprises:
Reduce this working temperature through starting a radiator fan.
6. optical imaging device comprises:
One light emitting source is made up of a light emitting diode module, and this light emitting diode module has a plurality of light emitting diodes and produces a plurality of basic coloured light respectively;
One Temperature Detector is in order to detect a working temperature of this light emitting diode module;
And
One controller; Connect this light emitting source and this Temperature Detector, adjust a plurality of drive signals of offering said light emitting diode according to the black body radiation line of this working temperature and the chromaticity coordinates figure that said basic coloured light constituted to reduce in the said basic coloured light colour temperature of one of them at least.
7. optical imaging device according to claim 6; Wherein this controller receives the colour temperature adjustment look-up table of setting up according to this black body radiation line of the chromaticity coordinates figure that said basic coloured light constituted; And when this working temperature during greater than a design temperature, this controller is adjusted the said drive signal that offers said light emitting diode to reduce in the said basic coloured light colour temperature of one of them at least according to this colour temperature adjustment look-up table.
8. optical imaging device according to claim 6, wherein said basic coloured light are a red light, a green light and a blue light.
9. optical imaging device according to claim 8; Wherein this controller is adjusted the said drive signal that offers said light emitting diode when reducing in the said basic coloured light at least the colour temperature of one of them according to this working temperature and this black body radiation line; Adjust in advance this red light colour temperature or this green light colour temperature at least one of them, adjust the colour temperature of this blue light at last.
10. optical imaging device according to claim 6 wherein also comprises:
One radiator fan connects this controller, in order to reduce this working temperature.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010102274934A CN102333398A (en) | 2010-07-12 | 2010-07-12 | Optical imaging apparatus and temperature control method of light emitting diode module thereof |
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| CN2010102274934A CN102333398A (en) | 2010-07-12 | 2010-07-12 | Optical imaging apparatus and temperature control method of light emitting diode module thereof |
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Cited By (3)
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| CN103249205A (en) * | 2012-02-09 | 2013-08-14 | 上海技磐光电科技有限公司 | Led lamp |
| CN103249206A (en) * | 2012-02-09 | 2013-08-14 | 上海技磐光电科技有限公司 | LED lamp |
| CN103249205B (en) * | 2012-02-09 | 2016-11-30 | 上海技磐光电科技有限公司 | Led lamp |
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| WO2003019072A1 (en) * | 2001-08-23 | 2003-03-06 | Yukiyasu Okumura | Color temperature-regulable led light |
| CN101334581A (en) * | 2007-06-29 | 2008-12-31 | 鸿富锦精密工业（深圳）有限公司 | Projecting system and its color temperature regulation method |
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- 2010-07-12 CN CN2010102274934A patent/CN102333398A/en active Pending
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| WO2003019072A1 (en) * | 2001-08-23 | 2003-03-06 | Yukiyasu Okumura | Color temperature-regulable led light |
| CN101334581A (en) * | 2007-06-29 | 2008-12-31 | 鸿富锦精密工业（深圳）有限公司 | Projecting system and its color temperature regulation method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103249205A (en) * | 2012-02-09 | 2013-08-14 | 上海技磐光电科技有限公司 | Led lamp |
| CN103249206A (en) * | 2012-02-09 | 2013-08-14 | 上海技磐光电科技有限公司 | LED lamp |
| CN103249205B (en) * | 2012-02-09 | 2016-11-30 | 上海技磐光电科技有限公司 | Led lamp |
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Application publication date: 20120125 |