CN103822116B - Light source module and light-emitting control method - Google Patents
Light source module and light-emitting control method Download PDFInfo
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- CN103822116B CN103822116B CN201310750226.9A CN201310750226A CN103822116B CN 103822116 B CN103822116 B CN 103822116B CN 201310750226 A CN201310750226 A CN 201310750226A CN 103822116 B CN103822116 B CN 103822116B
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Abstract
The present invention discloses a kind of light source module and light-emitting control method.This light source module has multiple light-emitting device, luminous according to a cycle ground.This periodic packets contains multiple period, respectively corresponding the plurality of light-emitting device.This light-emitting control method comprises each light-emitting device of driving in the period of correspondence with indivedual main power light-emitting; And in each period driving beyond period that each light-emitting device is corresponding in the plurality of period, luminous with corresponding auxiliary power.Wherein this corresponding auxiliary power is less than the indivedual main power of the light-emitting device corresponding to this period, and this corresponding auxiliary power is no more than corresponding limits value divided by the value of indivedual main power of the light-emitting device corresponding to this period.
Description
Technical field
The present invention about a kind of light source module and light-emitting control method thereof, espespecially a kind of periodically luminous light source module and light-emitting control method thereof that can be used for projector.
Background technology
Current projector's many uses light-emittingdiode (light-emittingdiode, LED) is as light source, but LED is because of material behavior, and its luminosity can increase with service time and decay, and makes the image projected produce color variation.Now, the input current to LED can be improved, to compensate the decay of luminosity.But, generally speaking, input current is higher, the heat that LED produces in time operating is more, makes contact temperature be difficult to suppress, and then shortens service life, therefore the mode of aforementioned raising input current by making more shorten the service life of LED, luminous efficiency is poorer, decay problem can again occur quickly, input current need improve again, until brightness cannot effective compensation or even make LED damage till.Therefore, the method for aforementioned backoff brightness easily makes exhaust sooner the service life of LED, increases projector's operating cost.If avoid input current to improve excessively, then luminosity compensation effect is limited.In addition, if the coloured light that the light source module of projector uses different LED to provide different, the decay situation of the LED of different color light is also different, therefore required electric current raising degree is also different.Though independently can adjust for each coloured light LED according to the method for aforementioned backoff brightness, but the brightness ratio of each coloured light LED luminescence after adjustment not easily maintains, especially for avoiding input current to improve excessively, the brightness of each coloured light LED luminescence after adjustment may full remuneration, this, by larger for the proportional difference made before the brightness ratio of each coloured light LED luminescence after adjusting and adjustment, causes the color distortion of projection image.
Summary of the invention
In view of the problems of the prior art, the object of the present invention is to provide a kind of light-emitting control method, luminous for controlling multiple light-emitting device, make each light-emitting device not only luminous within the work period (dutycycle) of oneself, also luminous within the work period of other light-emitting devices, Integral luminous brightness is adjusted, and can avoid excessively improving the problem that input current causes the light-emitting device lost of life.
The invention provides a kind of light-emitting control method, the method is for having in the light source module of multiple light-emitting device, the plurality of light-emitting device is luminous according to cycle ground, this periodic packets is containing multiple period, the plurality of period is corresponding the plurality of light-emitting device respectively, and this light-emitting control method comprises the following step: drive each light-emitting device in the period of correspondence with indivedual main power light-emitting; And in each period beyond the period driving each light-emitting device this correspondence in the plurality of period, luminous with corresponding auxiliary power, wherein this corresponding auxiliary power is less than this indivedual main power of this light-emitting device of corresponding period, and this corresponding auxiliary power is no more than corresponding limits value divided by the value of this indivedual main power of this light-emitting device volume of corresponding period.Like this, this light source module Integral luminous brightness obtains adjustment.In addition, this light-emitting control method can further improve and drives luminous this corresponding indivedual main power of each light-emitting device, this light source module Integral luminous brightness of same adjustable.
Preferably, in described light-emitting control method, these corresponding auxiliary power sums multiple of each light-emitting device are equal divided by the value of this indivedual main power.
Preferably, in described light-emitting control method, when each corresponding auxiliary power equals the limits value of this correspondence divided by the value of this indivedual main power of this light-emitting device of corresponding period, this light-emitting control method more comprises the following step after step b: improve this indivedual main power of correspondence driving each light-emitting device luminescence, wherein this corresponding auxiliary power multiple of each light-emitting device and this indivedual main power sum after improving equal divided by the value of this corresponding auxiliary power multiple and this indivedual main power sum before improving.
Preferably, in described light-emitting control method, before step b, more comprise the following step: improve this indivedual main power of correspondence driving each light-emitting device luminescence, this indivedual main power after the raising of wherein each light-emitting device is equal divided by the value of this indivedual main power before improving.
Preferably, in described light-emitting control method, the plurality of light-emitting device comprises three light-emitting devices, respectively red-emitting, green glow and blue light.
Preferably, in described light-emitting control method, the plurality of light-emitting device is the light-emitting device of multiple light emitting diode.
Preferably, in described light-emitting control method, by control inputs electric current to drive each light-emitting device luminous.
The present invention also provides a kind of light source module, and it is luminous to adjust Integral luminous brightness that this light source module controls this light source module with light-emitting control method of the present invention, and can avoid excessively improving the problem that input current causes the light-emitting device lost of life.
Light source module of the present invention comprises multiple light-emitting device and controller, and this controller is electrically connected with the plurality of light-emitting device and controls the luminescence of the plurality of light-emitting device.The plurality of light-emitting device is luminous according to cycle ground, and this periodic packets is containing multiple period, and the plurality of period is corresponding the plurality of light-emitting device respectively.This controller drives each light-emitting device in the period of correspondence with indivedual main power light-emitting, and in each period beyond the period that this controller drives each light-emitting device this correspondence in the plurality of period, luminous with corresponding auxiliary power, wherein this corresponding auxiliary power is less than this indivedual main power of this light-emitting device of corresponding period, and this corresponding auxiliary power is no more than corresponding limits value divided by the value of this indivedual main power of this light-emitting device of corresponding period.Similarly, therefore this light source module Integral luminous brightness obtain adjustment; In addition, this light source module Integral luminous brightness also can improve luminous this corresponding indivedual main power of each light-emitting device of driving to obtain adjustment further by this controller.
Preferably, in described light source module, these corresponding auxiliary power sums multiple of each light-emitting device are equal divided by the value of this indivedual main power.
Preferably, in described light source module, when each corresponding auxiliary power equals the limits value of this correspondence divided by the value of this indivedual main power of this light-emitting device of corresponding period, this controller improves this indivedual main power of correspondence driving each light-emitting device luminescence, wherein this corresponding auxiliary power multiple of each light-emitting device and this indivedual main power sum after improving equal divided by the value of this corresponding auxiliary power multiple and this indivedual main power sum before improving.
Preferably, in described light source module, this controller improves this indivedual main power of correspondence driving each light-emitting device luminescence, and this indivedual main power after the raising of wherein each light-emitting device is equal divided by the value of this indivedual main power before improving.
Preferably, in described light source module, multiple light-emitting device comprises three light-emitting devices, and this controller controls these three light-emitting devices red-emitting, green glow and blue light respectively.
Preferably, in described light source module, the plurality of light-emitting device is the light-emitting device of multiple light emitting diode.
Preferably, in described light source module, this controller controls the input current of each light-emitting device to drive this light-emitting device luminescence.
Relative to prior art, the present invention controls light-emitting device luminescence can not only be luminous within the work period of oneself (period that namely this light-emitting device is corresponding), also can within the work period of other light-emitting devices luminous (period beyond the period that namely this light-emitting device is corresponding), to adjust the luminosity of this light source module entirety; In other words, by light-emitting control method of the present invention, this light source module Integral luminous brightness can obtain adjustment without the need to improving the luminous power of each light-emitting device in its work period, and can avoid excessively improving the problem that input current causes the light-emitting device lost of life.In addition, the present invention also limits the ratio (that is be no more than the limits value of this correspondence) of this corresponding auxiliary power for this indivedual main power of correspondence, to avoid Color Channel to produce excessive colour cast (colordeviation), therefore the present invention can take into account the lifting of Integral luminous brightness and the stability of colors of image.
Accompanying drawing explanation
Fig. 1 is the functional block diagram of the present invention one preferred embodiment light source module;
Fig. 2 is the lighting timings figure of light source module before adjustment in Fig. 1;
Fig. 3 is the flow chart of the present invention one preferred embodiment light-emitting control method;
Fig. 4 be in Fig. 1 light source module according to the flow process of Fig. 3 through the first stage adjustment after lighting timings figure;
Fig. 5 be in Fig. 1 light source module according to the flow process of Fig. 3 through second stage adjustment after lighting timings figure;
Fig. 6 is the flow chart of another embodiment of the present invention light-emitting control method;
Fig. 7 be in Fig. 1 light source module according to the flow process of Fig. 6 through the first stage adjustment after lighting timings figure;
Fig. 8 be in Fig. 1 light source module according to the flow process of Fig. 6 through second stage adjustment after lighting timings figure.
Detailed description of the invention
For making there is further understanding to object of the present invention, structure, feature and function thereof, embodiment is hereby coordinated to be described in detail as follows.
Refer to Fig. 1 and Fig. 2, Fig. 1 is the functional block diagram of the light source module 1 of the present invention one preferred embodiment, and Fig. 2 is the lighting timings figure of light source module 1 before adjustment.Light source module 1 comprises controller 12 and multiple light-emitting device, and the plurality of light-emitting device is periodically luminous according to cycle T, and controller 12 is electrically connected with the plurality of light-emitting device and controls the luminescence of the plurality of light-emitting device.In the present embodiment, the plurality of light-emitting device comprises the first light-emitting device 14a, the second light-emitting device 14b and the 3rd light-emitting device 14c, launches different color light respectively, such as ruddiness, green glow and blue light; But the present invention is not all as limit, in actual applications, the coloured light kind of light-emitting device usage quantity and transmitting thereof, all depending on applied environment, such as, time for projector, also may use four or six light-emitting devices to launch four or six kind of coloured light.In addition, light-emitting device 14a, 14b and 14c is also all not limited to LED.The magnitude setting of corresponding the plurality of light-emitting device, cycle T also comprises multiple period, therefore in the present embodiment, the plurality of period comprises the first period T1, the second period T2 and the 3rd period T3.Before the luminous power adjustment of light-emitting device 14a, 14b and 14c, controller 12 drive each light-emitting device 14a, 14b and 14c to preset only luminous with indivedual main power P 1, P2 and P3 in period T1, T2 and T3 (that is work period of correspondence) of correspondence.What remark additionally is, aforementioned indivedual main power P 1, P2 and P3 can be systemic presupposition or show (onscreendisplay based on user by screen, OSD) display setting performed by menu and determining, wherein this setting can be such as brightness, contrast, colour etc., represent mainly with percentile rank or numerical digit color range, though these adjustment for the parameter set are relevant with luminous power, but adjust without fixing and direct relation with luminous power, so setting and indication of the present invention change luminous power to adjust or to compensate luminosity decay person different.After light source module 1 uses a period of time, the luminous efficiency decay of LED, makes the luminosity of light-emitting device 14a, 14b and 14c decline.Now, can adjust according to light-emitting control method of the present invention, with compensate for brightness.Below put up with different adjustment or compensate luminosity flow process and illustrate respectively.
It is the flow chart of the light-emitting control method of one embodiment of the invention referring to Fig. 3, Fig. 3.In the present embodiment, this light-emitting control method utilizes controller 12 to drive each light-emitting device 14a, 14b and 14c luminous with indivedual main power P 1, P2 and P3 in T1, T2 and T3 in period of correspondence, as indicated in step sloo.Now, the luminous power of light-emitting device 14a, 14b and 14c namely as shown in Figure 2.When the brightness of light source module 1 Integral luminous declines (luminous efficiency of such as LED decays after use a period of time), in each period beyond light-emitting control method of the present invention utilize controller 12 to drive period that each light-emitting device 14a, 14b and 14c are corresponding in the plurality of period T1, T2 and T3, luminous with corresponding auxiliary power, as shown in step S120.Now, namely light-emitting device 14a, 14b and 14c have implemented first stage adjustment, and its luminous power is namely as shown in solid line in Fig. 4, and the luminous power before not adjusting is represented by dotted lines in Fig. 4.For ease of illustrating, light-emitting device 14a, 14b and 14c represent in the luminous power of day part T1, T2 and T3 with matrix subscript.In the present embodiment, light source module 1 is after step S120 adjustment, and light-emitting device 14a is luminous with indivedual main power P 1 in the first period T1, luminous and luminous with corresponding auxiliary power P13 in the 3rd period T3 with corresponding auxiliary power P12 in the second period T2; Light-emitting device 14b is luminous with corresponding auxiliary power P21 in the first period T1, luminous and luminous with corresponding auxiliary power P23 in the 3rd period T3 with indivedual main power P 2 in the second period T2; Light-emitting device 14c is luminous with corresponding auxiliary power P31 in the first period T1, luminous and luminous with indivedual main power P 3 in the 3rd period T3 with corresponding auxiliary power P32 in the second period T2.In actual applications, for the colour cast causing each Color Channel (i.e. light source module 1 send in day part T1, T2 and T3 coloured light) excessive after avoiding adjusting, in each period T1, T2 and T3, corresponding auxiliary power is no more than corresponding limits value divided by the value of the indivedual main power of light-emitting device 14a, 14b or 14c of corresponding period; Corresponding limits value represents with matrix subscript and can be: Pij/Pj >=Cij, and wherein i, j are from 1 to 3, and i ≠ j, when j=1,2,3 time, namely Pj is respectively P1, P2, P3.Because the relation of LED luminous power to luminosity of a shade every in practical application is not quite similar, therefore the colour cast impact that corresponding auxiliary power produces each Color Channel is also not identical, and therefore the limits value Cij of each correspondence also can be not quite similar.If the impact that aforementioned corresponding auxiliary power produces not quite maybe can be ignored, then the limits value Cij of each correspondence also can be set as identical.Such as, in actual applications, with regard to single period T1, T2 and T3, corresponding auxiliary power can be established equal divided by the value (i.e. Pij/Pj) of the indivedual main power of light-emitting device 14a, 14b or 14c of corresponding period, to simplify control, even for each period T1, T2 and T3, all adopt identical value (namely Pij/Pj is definite value).In addition, the color distortion (colordistortion) of image is caused after avoiding adjusting, the power that each light-emitting device 14a, 14b and 14c luminescence in one-period T consumes can maintain certain proportion, or is maintained in permissible deviation range; In other words, P1+P12+P13:P21+P2+P23:P31+P32+P3 (ratio namely after adjustment) equals P1:P2:P3 (ratio that namely adjustment is front), or both this, (ratio namely after adjustment is relative to the ratio before adjustment) still falls within this permissible deviation range.Or say, the luminous consumed power ratio that each light-emitting device 14a, 14b and 14c increase in one-period T is identical, in other words, (P12+P13)/P1=(P21+P23)/P2=(P31+P32)/P3, or this ratio can be controlled in permissible deviation range.
Now, light source module 1 adjusts through the first stage, by each light-emitting device 14a, 14b and 14c, additionally in the work period of non-corresponding, with corresponding auxiliary power Pij, (wherein i, j are from 1 to 3 for it, and i ≠ j) luminous to increase light source module 1 Integral luminous power, and then realize the object of Integral luminous brightness adjustment or compensation.Afterwards, then through a period of time use after, the brightness of light source module 1 Integral luminous may again decay and need again adjust.In actual applications, though abovementioned steps S220 can be repeated to compensate the brightness again decayed, but when corresponding auxiliary power has reached corresponding limits value divided by the value of the indivedual main power of light-emitting device 14a, 14b or 14c of corresponding period, that is Pij/Pj=Cij (wherein, i, j are from 1 to 3, and i ≠ j) time, light-emitting control method of the present invention can utilize controller 12 to improve indivedual main power P 1, P2 and P3 of the correspondence of each light-emitting device of driving luminous 14a, 14b and 14c further, as shown in step s 140; In other words, light-emitting device 14a, 14b and 14c is luminous with the indivedual main power P 1' after improving, P2', P3' in T1, T2 and T3 in period of correspondence.Now, the luminous power of light-emitting device 14a, 14b and 14c is namely as shown in solid line in Fig. 5, and wherein, the luminous power before not adjusting also is represented by dotted lines in Fig. 5.Similarly, the color distortion of image is caused after avoiding adjusting, the power that each light-emitting device 14a, 14b and 14c luminescence in one-period T consumes can maintain certain proportion, or say, each light-emitting device 14a, 14b and 14c adjust forward and backward luminous power ratio in indivedual main power in one-period T can maintain certain proportion, or is maintained in permissible deviation range.In other words, namely P1'+P12+P13:P21+P2'+P23:P31+P32+P3'(adjusts rear ratio) equal P1+P12+P13:P21+P2+P23:P31+P32+P3 (ratio that namely adjustment is front), or represent with ratio, i.e. (P1'+P12+P13)/(P1+P12+P13)=(P2'+P21+P23)/(P21+P2+P23)=(P3'+P31+P32)/(P31+P32+P3), or this ratio is controlled in permissible deviation range.Supplementary notes, in actual applications, the luminous power of each light-emitting device 14a, 14b and 14c all has its upper limit, therefore in principle, the indivedual main power P 1' after aforementioned raising, P2', P3' are all limited to be no more than this upper limit.
Now, light source module 1 adjusts through second stage, its by each light-emitting device 14a, 14b and 14c in the work period (i.e. period T1, T2 and T3) of oneself with the indivedual main power P 1' after improving, P2', P3' luminescence to increase light source module 1 Integral luminous power again, and then realize the object that Integral luminous brightness again adjusts or compensate.Supplementary notes, though aforementioned explanation all adjusts in three Color Channels simultaneously, the present invention is not as limit.In addition, if when light source module 1 luminosity is decayed once more afterwards, because each light-emitting device 14a, 14b and 14c have changed by higher indivedual main power P 1', P2', P3' luminescence in period T1, T2 and T3 of its correspondence, therefore corresponding auxiliary power Pij divided by the indivedual main power P j'(after raising wherein, i, j are from 1 to 3, and i ≠ j) value diminish, now, can implementation step S120 again, change with higher corresponding auxiliary power luminous.Same, be the colour cast causing each Color Channel excessive after avoiding adjusting, higher corresponding auxiliary power (still representing with Pij) still needs to be less than corresponding limits value Cij divided by indivedual value strengthening main power P j'; That is Pij/Pj'<Cij (wherein, i, j are from 1 to 3, and i ≠ j).
What remark additionally is again, aforementioned continuous setup process is first by the utilization of corresponding auxiliary power (namely luminous in the work period of non-corresponding), the utilization of the indivedual main power (namely strengthening luminous in the work period of correspondence) again after improving, to complete the adjustment in first and second stage respectively, but the present invention is not as limit.In actual applications, also first each light-emitting device 14a, 14b and 14c can be promoted luminous power in the work period of oneself, more luminous to increase light source module 1 Integral luminous power with corresponding auxiliary power in the work period of non-corresponding.Refer to Fig. 1,2 and 6, Fig. 6 be the flow chart of the light-emitting control method of another embodiment of the present invention.In the present embodiment, this light-emitting control method utilizes controller 12 to drive each light-emitting device 14a, 14b and 14c luminous with indivedual main power P 1, P2 and P3 in T1, T2 and T3 in period of correspondence, as shown in step S200.Now, the luminous power of light-emitting device 14a, 14b and 14c namely as shown in Figure 2.When the brightness of light source module 1 Integral luminous declines, this light-emitting control method utilizes controller 12 to improve indivedual main power P 1, P2 and P3 of the correspondence driving each light-emitting device luminescence, as shown in step S220; In other words, light-emitting device 14a, 14b and 14c is " luminous with the indivedual main power P 1 ", P2 " after improving, P3 in T1, T2 and T3 in period of correspondence.Now, the luminous power of light-emitting device 14a, 14b and 14c is namely as shown in solid line in Fig. 7, and wherein, the luminous power before not adjusting is represented by dotted lines in Fig. 7.Now, after avoiding adjusting, cause the color distortion of image, the power that each light-emitting device 14a, 14b and 14c luminescence in one-period T consumes can maintain certain proportion, or is maintained in permissible deviation range; In other words, P1 ": P2 ": P3 " equals P1:P2:P3, or represent with ratio, be i.e. P1 "/P1=P2 "/P2=P3 "/P3, or this ratio is controlled in permissible deviation range.Same, indivedual main power P after raising 1 ", P2 ", P3 " are also limited with the luminous power upper limit being no more than corresponding light-emitting device 14a, 14b and 14c.
Now, light source module 1 adjusts through the first stage, it is " luminous to increase light source module 1 Integral luminous power, and then realize the object that Integral luminous brightness again adjusts or compensate with indivedual main power P 1 ", P2 ", P3 after improving in the work period of oneself by each light-emitting device 14a, 14b and 14c.Wherein, in actual applications, the luminous power of each light-emitting device 14a, 14b and 14c all has the upper limit, therefore in principle, and aforementioned indivedual main power P 1 ", P2 ", P3 " are all limited to be no more than this upper limit.Similarly, then through a period of time use after, the brightness of light source module 1 Integral luminous may again decay and need again adjust.In each period beyond the period that light-emitting control method of the present invention can utilize controller 12 to drive each light-emitting device 14a, 14b or 14c this correspondence in the plurality of period T1, T2 and T3 further, luminous with corresponding auxiliary power, as shown in step S240.For ease of illustrating, light-emitting device 14a, 14b and 14c represent in the luminous power of day part T1, T2 and T3 with matrix subscript.In the present embodiment, light source module 1 after step S240 adjustment, light-emitting device 14a in the first period T1 with indivedual main power P 1 after improving " luminous, luminous and luminous with corresponding auxiliary power P13 in the 3rd period T3 with corresponding auxiliary power P12 in the second period T2; Light-emitting device 14b is luminous with corresponding auxiliary power P21 in the first period T1, " luminous and luminous with corresponding auxiliary power P23 in the 3rd period T3 with the indivedual main power P 2 after raising in the second period T2; Light-emitting device 14c is luminous with corresponding auxiliary power P31 in the first period T1, luminous and " luminous with the indivedual main power P 3 after raising in the 3rd period T3 with corresponding auxiliary power P32 in the second period T2.Now, the luminous power of light-emitting device 14a, 14b and 14c is namely as shown in solid line in Fig. 8, and wherein, the luminous power before not adjusting also is represented by dotted lines in Fig. 8.Same, for avoid adjust after cause each Color Channel excessive colour cast, in each period T1, T2 and T3, corresponding auxiliary power is no more than corresponding limits value divided by the value of the indivedual main power (in the present embodiment, the indivedual main power after namely improving) of light-emitting device 14a, 14b or 14c of corresponding period; Corresponding limits value represents with matrix subscript and can be: Pij/Pj " <Cij, wherein i, j are from 1 to 3, and i ≠ j, when j=1,2,3 time, Pj " is namely respectively P1 ", P2 ", P3 ".Be not quite similar by the relation of LED luminous power to luminosity of every a shade in actual applications, therefore the impact that corresponding auxiliary power produces is also not identical, therefore the limits value Cij of each correspondence also can be not quite similar.In addition, after avoiding adjusting, cause the color distortion of image, each light-emitting device 14a, 14b and 14c adjust in indivedual main power the power that forward and backward luminescence consumes in one-period T can maintain certain proportion, or is maintained in permissible deviation range; In other words, P1 "+P12+P13:P21+P2 "+P23:P31+P32+P3 " (ratio namely after adjustment) equals P1+P12+P13:P21+P2+P23:P31+P32+P3 (ratio that namely adjustment is front); or represent with ratio; namely (P1 "+P12+P13)/(P1+P12+P13)=(P2 "+P21+P23)/(P21+P2+P23)=(P3 "+P31+P32)/(P31+P32+P3), or this ratio is controlled in permissible deviation range.About Pij/Pj " and other of Cij illustrate, can consult previous embodiment, separately not repeat.
Now, light source module 1 adjusts through second stage, by each light-emitting device 14a, 14b and 14c, additionally in the work period of non-corresponding, with corresponding auxiliary power Pij, (wherein i, j are from 1 to 3 for it, and i ≠ j) luminescence again to increase light source module 1 Integral luminous power, and then realizes the object of Integral luminous brightness adjustment or compensation.In brief, the continuous setup process of the present embodiment is first by the utilization of the indivedual main power (namely strengthening luminous in the work period of correspondence) after raising, again through the utilization of corresponding auxiliary power (namely luminous in the work period of non-corresponding), to complete the adjustment in first and second stage respectively.
What remark additionally is, in foregoing embodiments, all to implement the luminosity compensation method explanation strengthening main power (namely strengthening luminous in the work period of correspondence) and auxiliary power (namely luminous in the work period of non-corresponding) respectively, but in actual applications, also can implement simultaneously, or staggered enforcement.In addition, no matter be adjust main power or increase auxiliary power without the need to once namely reaching the upper limit (such as LED luminous power all has the corresponding limits value of the upper limit, corresponding auxiliary power), therefore, in foregoing embodiments, each implementation step all can repeat to implement.In addition, in foregoing embodiments, also all illustrate for the situation that luminosity decay occurs repeatedly, but in actual applications, flow process shown in foregoing embodiments also only may perform the effect namely having reached required luminance compensation to midway, now, implements institute in steps from without the need to continuing.In addition, in actual applications, though luminosity decay can pass through other devices sensing to trigger luminous power of the present invention adjustment flow process (i.e. light-emitting control method), but in fact, because same batch products has the phenomenon of similar properties, therefore also based on the value of experience or test, the situation luminosity and decay with (use) time can be inferred, and implement luminous power adjustment in self-adjusting mode.
As aforementioned explanation, the present invention controls light-emitting device luminescence can not only be luminous within the work period of oneself (period that namely this light-emitting device is corresponding), also can within the work period of other light-emitting devices luminous (period beyond the period that namely this light-emitting device is corresponding), to adjust the luminosity of this light source module entirety; In other words, by light-emitting control method of the present invention, this light source module Integral luminous brightness can obtain adjustment without the need to improving the luminous power of each light-emitting device in its work period, and can avoid excessively improving the problem that input current causes the light-emitting device lost of life.In addition, the present invention also limits the ratio (that is be less than the limits value of this correspondence) of this corresponding auxiliary power for this indivedual main power of correspondence, to avoid Color Channel to produce excessive colour cast, therefore the present invention can take into account the lifting of Integral luminous brightness and the stability of colors of image.
The foregoing is only preferred embodiment of the present invention, all equalizations done according to the present patent application the scope of the claims change and modify, and all should belong to covering scope of the present invention.
Claims (14)
1. a light-emitting control method, for having in the light source module of multiple light-emitting device, the plurality of light-emitting device is luminous according to cycle ground, this periodic packets is containing multiple period, the plurality of period is corresponding the plurality of light-emitting device respectively, and it is characterized in that, this light-emitting control method comprises the following step:
A drives each light-emitting device in the period of its correspondence with indivedual main power light-emitting; And
In each period beyond the period that b drives each light-emitting device its correspondence in the plurality of period, luminous with corresponding auxiliary power, wherein this corresponding auxiliary power is less than the indivedual main power in period corresponding to this light-emitting device, and this corresponding auxiliary power is no more than corresponding limits value divided by the value of the indivedual main power in period corresponding to this light-emitting device.
2. light-emitting control method as claimed in claim 1, it is characterized in that, these corresponding auxiliary power sums multiple of each light-emitting device are equal divided by the value of this indivedual main power.
3. light-emitting control method as claimed in claim 1, it is characterized in that, when the corresponding auxiliary power of this in each period equals the limits value of this correspondence divided by the value of this indivedual main power of corresponding period, this light-emitting control method more comprises the following step after step b:
Improve this indivedual main power of correspondence driving each light-emitting device luminescence, wherein this corresponding auxiliary power multiple of each light-emitting device and this indivedual main power sum after improving equal divided by the value of this corresponding auxiliary power multiple and this indivedual main power sum before improving.
4. light-emitting control method as claimed in claim 1, is characterized in that, before step b, more comprise the following step:
Improve this indivedual main power of correspondence driving each light-emitting device luminescence, the indivedual main power after the raising of wherein each light-emitting device is equal divided by the value of the indivedual main power before improving.
5. light-emitting control method as claimed in claim 1, it is characterized in that, the plurality of light-emitting device comprises three light-emitting devices, respectively red-emitting, green glow and blue light.
6. light-emitting control method as claimed in claim 1, it is characterized in that, the plurality of light-emitting device is the light-emitting device of multiple light emitting diode.
7. light-emitting control method as claimed in claim 1, is characterized in that, by control inputs electric current to drive each light-emitting device luminous.
8. a light source module, is characterized in that, comprises:
Multiple light-emitting device, luminous according to cycle ground, this periodic packets is containing multiple period, and the plurality of period is corresponding the plurality of light-emitting device respectively; And
Controller, be electrically connected with the plurality of light-emitting device and control the luminescence of the plurality of light-emitting device, this controller drives each light-emitting device in the period of its correspondence with indivedual main power light-emitting, and in each period beyond the period that this controller drives each light-emitting device its correspondence in the plurality of period, luminous with corresponding auxiliary power, wherein this corresponding auxiliary power is less than the indivedual main power in period corresponding to this light-emitting device, and this corresponding auxiliary power is no more than corresponding limits value divided by the value of the indivedual main power in period corresponding to this light-emitting device.
9. light source module as claimed in claim 8, it is characterized in that, these corresponding auxiliary power sums multiple of each light-emitting device are equal divided by the value of this indivedual main power.
10. light source module as claimed in claim 8, it is characterized in that, when the corresponding auxiliary power of this in each period equals the limits value of this correspondence divided by the value of this indivedual main power of corresponding period, this controller improves this indivedual main power of correspondence driving each light-emitting device luminescence, wherein this corresponding auxiliary power multiple of each light-emitting device and this indivedual main power sum after improving equal divided by the value of this corresponding auxiliary power multiple and this indivedual main power sum before improving.
11. light source modules as claimed in claim 8, it is characterized in that, this controller improves this indivedual main power of correspondence driving each light-emitting device luminescence, and the indivedual main power after the raising of wherein each light-emitting device is equal divided by the value of the indivedual main power before improving.
12. light source modules as claimed in claim 8, it is characterized in that, the plurality of light-emitting device comprises three light-emitting devices, and this controller controls these three light-emitting devices red-emitting, green glow and blue light respectively.
13. light source module as claimed in claim 8, it is characterized in that, the plurality of light-emitting device is the light-emitting device of multiple light emitting diode.
14. light source modules as claimed in claim 8, is characterized in that, this controller controls the input current of each light-emitting device to drive this light-emitting device luminous.
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| TWI649979B (en) * | 2016-08-30 | 2019-02-01 | 遠東科技大學 | Optical signal transmission method carried out with ac led capable of light compensation |
| CN114173100A (en) * | 2020-09-11 | 2022-03-11 | 深圳光峰科技股份有限公司 | Projection device |
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