CN103822116A - Light source module and lighting control method - Google Patents
Light source module and lighting control method Download PDFInfo
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- CN103822116A CN103822116A CN201310750226.9A CN201310750226A CN103822116A CN 103822116 A CN103822116 A CN 103822116A CN 201310750226 A CN201310750226 A CN 201310750226A CN 103822116 A CN103822116 A CN 103822116A
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Abstract
The invention discloses a light source module and a lighting control method. The light source module comprises a plurality of lighting devices and emits light periodically according to a period. The period includes a plurality of intervals corresponding to the lighting devices respectively. The lighting control method includes the steps: driving each lighting device to emit light under an individual main power in the corresponding interval; driving each lighting device to emit light in other intervals, except the corresponding interval of the period, under corresponding auxiliary powers. The corresponding auxiliary powers are lower than the individual main power of the corresponding lighting device in the certain interval; a quotient obtained by dividing the individual main power of the corresponding lighting device in the certain interval by the corresponding auxiliary powers is not larger than a corresponding limit value.
Description
Technical field
The present invention is 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
At present projector is used light-emittingdiode (light-emitting diode, LED) as light source more, but LED is because of material behavior, and its luminosity can be decayed with increasing service time, makes the image of projection produce color variation.Now, can improve the input current to LED, to compensate the decay of luminosity.But, generally speaking, input current is higher, the heat that LED produces in the time of running is more, makes contact temperature be difficult to suppress, and then shortens service life, therefore the mode of aforementioned raising input current by more shortening the service life that makes LED, luminous efficiency is poorer, the problem of decay can occur quickly again, and input current need improve again, until brightness cannot effective compensation or even made LED damage.Therefore, the method for aforementioned compensate for brightness easily makes exhaust sooner the service life of LED, increases projector's operating cost.If avoid input current to improve excessively, luminosity compensation effect is limited.In addition, if the light source module of projector uses different LED that different coloured light is provided, the decay situation of the LED of different color light is also different, therefore required electric current improves also difference of degree.Though the method according to aforementioned compensate for brightness can independently be adjusted for each coloured light LED, but the luminous brightness ratio of each coloured light LED after adjusting is difficult for maintaining, especially for avoiding input current to improve excessively, the luminous brightness of each coloured light LED after adjustment may full remuneration, this by the luminous brightness ratio of each coloured light LED after making to adjust with adjust before proportional difference larger, cause 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, be used for controlling multiple light-emitting devices luminous, make each light-emitting device not only luminous within the work period (duty cycle) of oneself, also luminous within the work period of other light-emitting devices, Integral luminous brightness is adjusted, and can be avoided excessively improving input current and cause the problem of the light-emitting device lost of life.
The invention provides a kind of light-emitting control method, the method is for having the light source module of multiple light-emitting devices, the plurality of light-emitting device is periodically luminous according to the cycle, this periodic packets is containing multiple periods, 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 this corresponding period with indivedual main power light-emittings; And drive each light-emitting device in the plurality of period in each period beyond this corresponding period, luminous with corresponding auxiliary power, wherein this correspondence auxiliary power is less than this indivedual main power corresponding to this light-emitting device of this period, and this correspondence auxiliary power is no more than corresponding limits value divided by the value of these these the indivedual main power of light-emitting device volume corresponding to this period.Like this, this light source module Integral luminous brightness obtains and adjusts.In addition, this light-emitting control method can further improve this indivedual main power that drives the luminous correspondence of each light-emitting device, same this light source module Integral luminous brightness of capable of regulating.
Preferably, in described light-emitting control method, the plurality of corresponding auxiliary power sum of each light-emitting device equates divided by the value of these indivedual main power.
Preferably, in described light-emitting control method, in the time that each corresponding auxiliary power equals this corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this corresponding period, this light-emitting control method more comprises the following step after step b: improve and drive luminous this corresponding indivedual main power of each light-emitting device, wherein the value of this indivedual main power sums of these the indivedual main power sums after the plurality of corresponding auxiliary power of each light-emitting device and raising divided by the plurality of corresponding auxiliary power and before improving equates.
Preferably, in described light-emitting control method, before step b, more comprise the following step: improve and drive luminous this corresponding indivedual main power of each light-emitting device, wherein the indivedual main power of this after the raising of each light-emitting device equates divided by the value of these the 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 light-emitting device that the plurality of light-emitting device is multiple light emitting diodes.
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 this light source module is luminous to adjust Integral luminous brightness with this light source module of light-emitting control method control of the present invention, and can avoid excessively improving input current and cause the problem of the light-emitting device lost of life.
Light source module of the present invention comprises multiple light-emitting devices and controller, and it is luminous that this controller and the plurality of light-emitting device are electrically connected and control the plurality of light-emitting device.The plurality of light-emitting device is periodically luminous according to the cycle, and this periodic packets is containing multiple periods, and the plurality of period is corresponding the plurality of light-emitting device respectively.This controller drive each light-emitting device in this corresponding period with indivedual main power light-emittings, and this controller drives each light-emitting device in the plurality of period in each period beyond this corresponding period, luminous with corresponding auxiliary power, wherein this correspondence auxiliary power is less than this indivedual main power corresponding to this light-emitting device of this period, and this correspondence auxiliary power is no more than corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this period.Similarly, therefore this light source module Integral luminous brightness obtain adjustment; In addition, this light source module Integral luminous brightness also can further be improved and be driven this indivedual main power of the luminous correspondence of each light-emitting device to adjust to obtain by this controller.
Preferably, in described light source module, the plurality of corresponding auxiliary power sum of each light-emitting device equates divided by the value of these indivedual main power.
Preferably, in described light source module, in the time that each corresponding auxiliary power equals this corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this corresponding period, this controller improves luminous this corresponding indivedual main power of each light-emitting device of driving, and wherein the value of this indivedual main power sums of these the indivedual main power sums after the plurality of corresponding auxiliary power of each light-emitting device and raising divided by the plurality of corresponding auxiliary power and before improving equates.
Preferably, in described light source module, this controller improves luminous this corresponding indivedual main power of each light-emitting device of driving, and wherein the indivedual main power of this after the raising of each light-emitting device equates divided by the value of these the indivedual main power before improving.
Preferably, in described light source module, multiple light-emitting devices comprise three light-emitting devices, these three light-emitting devices of this controller control red-emitting, green glow and blue light respectively.
Preferably, in described light source module, the light-emitting device that the plurality of light-emitting device is multiple light emitting diodes.
Preferably, in described light source module, the input current of this each light-emitting device of controller control is to drive this light-emitting device luminous.
With respect to prior art, control light-emitting device of the present invention is luminous can not only be luminous within the work period of oneself (i.e. period corresponding to this light-emitting device), also can be luminous within the work period of other light-emitting devices (period beyond the period that 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 improving each light-emitting device in the luminous power of its work period, and can avoid excessively improving input current and cause the problem of the light-emitting device lost of life.In addition, the present invention also limits the ratio (that is be no more than this corresponding limits value) of this correspondence auxiliary power for these indivedual main power of correspondence, to avoid Color Channel to produce excessive colour cast (color deviation), 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's one preferred embodiment light source module;
Fig. 2 is the luminous sequential chart of light source module before adjusting in Fig. 1;
Fig. 3 is the flow chart of the present invention's 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 adjust after luminous sequential chart;
Fig. 5 be in Fig. 1 light source module according to the flow process of Fig. 3 through second stage adjust after luminous sequential chart;
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 adjust after luminous sequential chart;
Fig. 8 be in Fig. 1 light source module according to the flow process of Fig. 6 through second stage adjust after luminous sequential chart.
The specific embodiment
For making that object of the present invention, structure, feature and function thereof are had to further understanding, hereby coordinate embodiment 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's one preferred embodiment, and Fig. 2 is the luminous sequential chart of light source module 1 before adjusting.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 it is luminous that controller 12 and the plurality of light-emitting device are electrically connected and control 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 respectively different color light, for example ruddiness, green glow and blue light; But the present invention is all as limit, in actual applications, the coloured light kind of light-emitting device usage quantity and transmitting thereof is all depending on applied environment, for example, during 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 are also all not limited to LED.The magnitude setting of corresponding the plurality of light-emitting device, cycle T also comprises multiple periods, 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 of light-emitting device 14a, 14b and 14c is adjusted, controller 12 drives each light-emitting device 14a, 14b and the default ground of 14c only luminous with indivedual main power P 1, P2 and P3 in corresponding period T1, T2 and T3 (that is corresponding work period).What remark additionally is, aforementioned indivedual main power P 1, P2 and P3 can be systemic presupposition or show (on screen display based on user by screen, OSD) the performed display setting of 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 with the fixing and direct relation of luminous power adjustment nothing, so set different with adjustment or compensation luminosity decay person from indication change luminous power of the present invention.When light source module 1 used after a period of time, the luminous efficiency decay of LED, declines the luminosity of light-emitting device 14a, 14b and 14c.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.
Referring to Fig. 3, the flow chart of the light-emitting control method that Fig. 3 is one embodiment of the invention.In the present embodiment, this light-emitting control method utilize controller 12 drive each light-emitting device 14a, 14b and 14c luminous with indivedual main power P 1, P2 and P3 in corresponding period T1, T2 and T3, as shown in step S100.Now, the luminous power of light-emitting device 14a, 14b and 14c as shown in Figure 2.For example, in the time that the 1 Integral luminous brightness of light source module declines (luminous efficiency of LED decays after using a period of time), light-emitting control method of the present invention utilizes controller 12 to drive each light-emitting device 14a, 14b and 14c in the plurality of period T1, T2 and T3 in each period beyond this corresponding period, luminous with corresponding auxiliary power, as shown in step S120.Now, light-emitting device 14a, 14b and 14c have implemented the first stage and have adjusted, and its luminous power is 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 explanation, light-emitting device 14a, 14b and 14c represent with matrix subscript in the luminous power of day part T1, T2 and T3.In the present embodiment, light source module 1 is after step S120 adjusts, 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 causing the excessive colour cast of each Color Channel (be light source module 1 send in day part T1, T2 and T3 coloured light) 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 indivedual main power of light-emitting device 14a, 14b corresponding to this period or 14c; Corresponding limits value represents can be with matrix subscript: Pij/Pj >=Cij, and wherein i, j are from 1 to 3, and i ≠ j, as j=1,2,3 time, Pj is respectively P1, P2, P3.Because the LED luminous power of every a shade in practical application is not quite similar to the relation of luminosity, therefore the colour cast that corresponding auxiliary power produces each Color Channel impact is also not identical, therefore each corresponding limits value Cij also can be not quite similar.If the impact that aforementioned corresponding auxiliary power produces not quite maybe can be ignored, each corresponding limits value Cij also can be set as identical.For example, in actual applications, with regard to single period T1, T2 and T3, corresponding auxiliary power can be established equal divided by the value (being Pij/Pj) of indivedual main power of light-emitting device 14a, 14b corresponding to this period or 14c, control to simplify, even, for each period T1, T2 and T3, all adopt identical value (being that Pij/Pj is definite value).In addition, cause the color distortion (color distortion) of image for after avoiding adjusting, the power of each light-emitting device 14a, 14b and the luminous consumption of 14c 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 after adjusting) equals P1:P2:P3 (adjusting front ratio), or these both (ratio after adjusting is with respect to the ratios before adjusting) still fall 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 is adjusted through the first stage, by each light-emitting device 14a, 14b and 14c, additionally in the work period of non-correspondence, take corresponding auxiliary power Pij, (wherein i, j are as 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 1 Integral luminous brightness of light source module may again decay and need again adjust.In actual applications, though can repeat abovementioned steps S220 with the compensation brightness of decay again, but when corresponding auxiliary power has reached corresponding limits value divided by the value of indivedual main power of light-emitting device 14a, 14b corresponding to this period or 14c, that is Pij/Pj=Cij (wherein, i, j are from 1 to 3, and when i ≠ j), light-emitting control method of the present invention can utilize controller 12 to improve corresponding indivedual main power P 1, P2 and the P3 that drive the luminous 14a of each light-emitting device, 14b and 14c further, as shown in step S140; In other words, light-emitting device 14a, 14b and 14c are luminous with indivedual main power P 1', P2', P3' after improving in corresponding period T1, T2 and T3.Now, the luminous power of light-emitting device 14a, 14b and 14c is as shown in solid line in Fig. 5, and wherein, the luminous power before not adjusting is also represented by dotted lines in Fig. 5.Similarly, cause the color distortion of image for after avoiding adjusting, the power of each light-emitting device 14a, 14b and the luminous consumption of 14c in one-period T 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, P1'+P12+P13:P21+P2'+P23:P31+P32+P3'(adjusts rear ratio) equal P1+P12+P13:P21+P2+P23:P31+P32+P3 (adjust front ratio), or with than value representation, i.e. (P1'+P12+P13)/(P1+P12+P13)=(P2'+P21+P23)/(P21+P2+P23)=(P3'+P31+P32)/(P31+P32+P3), or this proportion control is 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, indivedual main power P 1', P2', P3' after aforementioned raising are all limited to be no more than this upper limit.
Now, light source module 1 has passed through second stage adjustment, it is luminous to increase light source module 1 Integral luminous power with indivedual main power P 1', P2', P3' after improving in the work period (being period T1, T2 and T3) of oneself by each light-emitting device 14a, 14b and 14c again, and then realizes the object that Integral luminous brightness is again adjusted or compensated.Supplementary notes, though above stated specification is all adjusted 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' luminous in its corresponding period T1, T2 and T3, therefore corresponding auxiliary power Pij divided by the indivedual main power P j'(after improving wherein, i, j are from 1 to 3, the value of and i ≠ j) diminishes, now, implementation step S120 again, changes with higher corresponding auxiliary power luminous.Same, for avoiding causing the colour cast that each Color Channel is excessive after adjustment, higher corresponding auxiliary power (still representing with Pij) still needs to be less than corresponding limits value Cij divided by indivedual values that strengthen main power P j'; That is Pij/Pj'<Cij (wherein, i, j are from 1 to 3, and i ≠ j).
Supplementary notes is again, aforementioned continuous setup process is first by the utilization of corresponding auxiliary power (luminous in the work period of non-correspondence), the utilization of the indivedual main power (strengthening luminous in the corresponding work period) after improving again, to complete respectively the adjustment in first and second stage, but the present invention is not as limit.In actual applications, also can first each light-emitting device 14a, 14b and 14c be promoted to 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-correspondence.Refer to Fig. 1,2 and the flow chart of 6, Fig. 6 light-emitting control method that is another embodiment of the present invention.In the present embodiment, this light-emitting control method utilize controller 12 drive each light-emitting device 14a, 14b and 14c luminous with indivedual main power P 1, P2 and P3 in corresponding period T1, T2 and T3, as shown in step S200.Now, the luminous power of light-emitting device 14a, 14b and 14c as shown in Figure 2.In the time that the 1 Integral luminous brightness of light source module declines, this light-emitting control method utilizes controller 12 to improve and drives luminous corresponding indivedual main power P 1, P2 and the P3 of each light-emitting device, as shown in step S220; In other words, light-emitting device 14a, 14b and 14c are " luminous with indivedual main power P 1 ", P2 ", P3 after improving in corresponding period T1, T2 and T3.Now, the luminous power of light-emitting device 14a, 14b and 14c is 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, cause the color distortion of image for after avoiding adjusting, the power of each light-emitting device 14a, 14b and the luminous consumption of 14c in one-period T can maintain certain proportion, or is maintained in permissible deviation range; In other words, P1 ": P2 ": P3 " equal P1:P2:P3, or with than value representation, i.e. P1 "/P1=P2 "/P2=P3 "/P3, or this proportion control is in permissible deviation range.Same, indivedual main power P 1 after raising ", P2 ", P3 " are also limited with the luminous power upper limit that is no more than corresponding light-emitting device 14a, 14b and 14c.
Now, light source module 1 is adjusted through the first stage, it is " luminous with increase light source module 1 Integral luminous power, and then realize the object that Integral luminous brightness is again adjusted or compensated with the indivedual main power P 1 after improving ", P2 ", P3 in oneself work period 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, 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 1 Integral luminous brightness of light source module may again decay and need again adjust.Light-emitting control method of the present invention can utilize controller 12 to drive each light-emitting device 14a, 14b or 14c in the plurality of period T1, T2 and T3 in each period beyond this corresponding period further, luminous with corresponding auxiliary power, as shown in step S240.For ease of explanation, light-emitting device 14a, 14b and 14c represent with matrix subscript in the luminous power of day part T1, T2 and T3.In the present embodiment, light source module 1 through step S240 adjust after, light-emitting device 14a in the first period T1 with improve after indivedual main power P 1 " 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 improving 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 improving 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 as shown in solid line in Fig. 8, and wherein, the luminous power before not adjusting is also represented by dotted lines in Fig. 8.Same, for avoiding causing the colour cast that each Color Channel is excessive after adjustment, 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 improving) of light-emitting device 14a, 14b corresponding to this period or 14c; Corresponding limits value represents can be with matrix subscript: Pij/Pj " <Cij, wherein i, j are from 1 to 3, and i ≠ j, as j=1,2,3 time, Pj " is respectively P1 ", P2 ", P3 ".By the LED luminous power of every a shade in actual applications, the relation of luminosity is not quite similar, therefore the impact that corresponding auxiliary power produces is also not identical, therefore each corresponding limits value Cij also can be not quite similar.In addition, cause the color distortion of image for after avoiding adjusting, the power that each light-emitting device 14a, 14b and 14c adjust forward and backward luminous consumption in indivedual main power 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 " (adjust after ratio) equals P1+P12+P13:P21+P2+P23:P31+P32+P3 (adjusting front ratio); or with than value representation; (P1 "+P12+P13)/(P1+P12+P13)=(P2 "+P21+P23)/(P21+P2+P23)=(P3 "+P31+P32)/(P31+P32+P3), or this proportion control is in permissible deviation range.About Pij/Pj " and other explanations of Cij, can consult previous embodiment, separately do not repeat.
Now, light source module 1 has passed through second stage adjustment, by each light-emitting device 14a, 14b and 14c, additionally in the work period of non-correspondence, take corresponding auxiliary power Pij, (wherein i, j are as from 1 to 3 for it, and i ≠ j) luminous again to increase light source module 1 Integral luminous power, and then realize 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 (strengthening luminous in the corresponding work period) after improving, again through the utilization of corresponding auxiliary power (luminous in the work period of non-correspondence), to complete respectively the adjustment in first and second stage.
What remark additionally is, in aforementioned each embodiment, all take the luminosity compensation method implementing respectively to strengthen main power (strengthening luminous) and auxiliary power (luminous in the work period of non-correspondence) in the corresponding work period as example explanation, but in actual applications, also can implement simultaneously, or staggered enforcement.In addition, no matter be to adjust main power or for example increase auxiliary power, without once reaching the upper limit (LED luminous power all has the corresponding limits value of the upper limit, corresponding auxiliary power), therefore in aforementioned each embodiment, each implementation step all can repeat to implement.In addition, in aforementioned each embodiment, also all take situation that luminosity decay occurs repeatedly as example explanation, but in actual applications, flow process shown in aforementioned each embodiment also may only be carried out to the effect that has reached required luminance compensation midway, now, and from implementing institute in steps without continuing.In addition, in actual applications, though luminosity decay can see through other device sensings and adjust flow process (being light-emitting control method) to trigger luminous power of the present invention, but in fact, because same batch products has the phenomenon of close characteristic, therefore value that also can be based on experience or test, infers and the situation of luminosity with the decay of (use) time, and implement luminous power adjustment in self-adjusting mode.
As above stated specification, control light-emitting device of the present invention is luminous can not only be luminous within the work period of oneself (i.e. period corresponding to this light-emitting device), also can be luminous within the work period of other light-emitting devices (period beyond the period that 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 improving each light-emitting device in the luminous power of its work period, and can avoid excessively improving input current and cause the problem of the light-emitting device lost of life.In addition, the present invention also limits the ratio (that is be less than this corresponding limits value) of this correspondence auxiliary power for these 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 of doing 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 the light source module of multiple light-emitting devices, the plurality of light-emitting device is periodically luminous according to the cycle, this periodic packets is containing multiple periods, the plurality of period is corresponding the plurality of light-emitting device respectively, it is characterized in that, this light-emitting control method comprises the following step:
A drive each light-emitting device in this corresponding period with indivedual main power light-emittings; And
B drives each light-emitting device in the plurality of period in each period beyond this corresponding period, luminous with corresponding auxiliary power, wherein this correspondence auxiliary power is less than this indivedual main power corresponding to this light-emitting device of this period, and this correspondence auxiliary power is no more than corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this period.
2. light-emitting control method as claimed in claim 1, is characterized in that, the plurality of corresponding auxiliary power sum of each light-emitting device equates divided by the value of these indivedual main power.
3. light-emitting control method as claimed in claim 1, it is characterized in that, in the time that each corresponding auxiliary power equals this corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this corresponding period, this light-emitting control method more comprises the following step after step b:
Improve and drive luminous this corresponding indivedual main power of each light-emitting device, wherein the value of this indivedual main power sums of these the indivedual main power sums after the plurality of corresponding auxiliary power of each light-emitting device and raising divided by the plurality of corresponding auxiliary power and before improving equates.
4. light-emitting control method as claimed in claim 1, is characterized in that, more comprises the following step before step b:
Improve and drive luminous this corresponding indivedual main power of each light-emitting device, wherein the indivedual main power of this after the raising of each light-emitting device equates divided by the value of these the indivedual main power before improving.
5. light-emitting control method as claimed in claim 1, 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, is characterized in that, the light-emitting device that the plurality of light-emitting device is multiple light emitting diodes.
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 devices, periodically luminous according to the cycle, this periodic packets is containing multiple periods, and the plurality of period is corresponding the plurality of light-emitting device respectively; And
Controller, to be electrically connected and to control the plurality of light-emitting device luminous with the plurality of light-emitting device, this controller drive each light-emitting device in this corresponding period with indivedual main power light-emittings, and this controller drives each light-emitting device in the plurality of period in each period beyond this corresponding period, luminous with corresponding auxiliary power, wherein this correspondence auxiliary power is less than this indivedual main power corresponding to this light-emitting device of this period, and this correspondence auxiliary power is no more than corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this period.
9. light source module as claimed in claim 8, is characterized in that, the plurality of corresponding auxiliary power sum of each light-emitting device equates divided by the value of these indivedual main power.
10. light source module as claimed in claim 8, it is characterized in that, in the time that each corresponding auxiliary power equals this corresponding limits value divided by the value of these indivedual main power of this light-emitting device corresponding to this corresponding period, this controller improves luminous this corresponding indivedual main power of each light-emitting device of driving, and wherein the value of this indivedual main power sums of these the indivedual main power sums after the plurality of corresponding auxiliary power of each light-emitting device and raising divided by the plurality of corresponding auxiliary power and before improving equates.
11. light source modules as claimed in claim 8, it is characterized in that, this controller improves luminous this corresponding indivedual main power of each light-emitting device of driving, and wherein the indivedual main power of this after the raising of each light-emitting device equates divided by the value of these the indivedual main power before improving.
12. light source modules as claimed in claim 8, is characterized in that, the plurality of light-emitting device comprises three light-emitting devices, these three light-emitting devices of this controller control red-emitting, green glow and blue light respectively.
13. light source module as claimed in claim 8, is characterized in that, the light-emitting device that the plurality of light-emitting device is multiple light emitting diodes.
14. light source modules as claimed in claim 8, is characterized in that, the input current of this each light-emitting device of controller control is to drive this light-emitting device luminous.
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| CN103822116B (en) | 2015-12-09 |
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