CN106154720B - A kind of projection light source wwhite balance control circuit - Google Patents

A kind of projection light source wwhite balance control circuit Download PDF

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Publication number
CN106154720B
CN106154720B CN201610744444.5A CN201610744444A CN106154720B CN 106154720 B CN106154720 B CN 106154720B CN 201610744444 A CN201610744444 A CN 201610744444A CN 106154720 B CN106154720 B CN 106154720B
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module
signal
light source
output
primary
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CN106154720A (en
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崔荣荣
郭大勃
李健锋
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Qingdao Hisense Laser Display Co Ltd
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Hisense Group Co Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2006—Lamp housings characterised by the light source
    • G03B21/2033—LED or laser light sources
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/2053—Intensity control of illuminating light

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Optics & Photonics (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Projection Apparatus (AREA)
  • Semiconductor Lasers (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a kind of projection light source wwhite balance control circuit, including Regulate signal module, there is provided and export each primary lights brightness regulated signal, and light source gating control module, each primary lights output module, make energy control module and time-sequence control module, each primary lights brightness regulated signal gates the light source type of control module selection according to light source, and each primary lights of time-sequence control module output light clock signal, each primary lights brightness regulated signal is exported to each primary lights output module, and light luminous, realize the regulation of primary colours brightness, it is finally reached the adjustment of white balance.Technical solution of the present invention also achieves the compatibility and versatility of projection light source wwhite balance control circuit, adds the scope of application of projection light source wwhite balance control circuit.

Description

A kind of projection light source wwhite balance control circuit
Technical field
The present invention relates to photoelectric field, more particularly to a kind of projection light source wwhite balance control circuit.
Background technology
With the development of science and technology, need to use the scene of laser projection product more and more.Along with laser projection product Use, due to environment cleanliness, temperature, and equipment itself operating influence, each primary lights of light source, such as RGB primary colours Light, it may occur that the ratio change under the white balance conditions originally set, so as to cause the change of white balance, color temperature shift is caused, Image frame colour cast so that projected picture Quality Down.
Light source had both been probably monochromatic laser light source and fluorescence light source or LED light source in above-mentioned laser projection product, also might be used Can be two-color laser light source and fluorescence light source or LED light source, or pure three colors LASER Light Source, due to LASER Light Source species not Together, the drive circuit complexity of LASER Light Source is caused, it is necessary to be designed accordingly blank level adjustment according to different light source types Circuit, the complexity of circuit design is added, improves R＆D costs.
The content of the invention
In order to solve problem of the prior art, the embodiments of the invention provide a kind of projection light source wwhite balance control circuit, Different types of LASER Light Source can be directed to and carry out white balance adjusting, improve the versatility and compatibility of circuit design.
For achieving the above object, it is as follows using technical scheme：
A kind of projection light source wwhite balance control circuit, including：Regulate signal module, light source gating control module, enabled control Molding block, time-sequence control module, the first primary lights output module, the second primary lights output module and three primary colours light output mould Block；
Regulate signal module exports primary lights brightness regulated signal；Regulate signal module output end and light source gating control mould The input connection of block；
The output end and the first primary lights output module, the second primary lights output module and the 3rd of light source gating control module The input of primary lights output module connects respectively, with by inputting light source type gate control signal and lighting control signal, The primary lights brightness regulated signal of Regulate signal module output end is exported defeated to the first primary lights output module, the second primary lights Go out in module or three primary colours light output module；
The output end of energy control module and the input of time-sequence control module and light source is set to gate the input of control module Connect respectively, to enable control signal by lighting control signal and the primary lights of output, generate logic enable signal, and will patrol Enable signal is collected to export respectively to time-sequence control module and light source gating control module；
The input of time-sequence control module and Regulate signal module output end and the output end point of light source gating control module Do not connect, the output end of time-sequence control module and the first primary lights output module, the second primary lights output module, three primary colours Light output module connects respectively, with logic-based enable signal and light source type gate control signal, when generation primary lights are lighted Sequential signal, and primary lights are lighted into clock signal and exported respectively to the first primary lights output module, the second primary lights output module In three primary colours light output module, the first primary lights output module, the second primary lights output module and three primary colours light output Any one in module is based on primary lights clock signal corresponding to primary lights brightness regulated signal and primary lights brightness regulated signal Primary lights corresponding to output；
Further, the second primary lights output module includes blue light emitting unit；
Further, the first primary lights output module includes red light-emitting unit, and/or three primary colours light output module bag Include green luminescence unit；
Further, the second primary lights output module includes multiple target primary colours light gating output module,
Input of the Regulate signal module output end also with multiple target primary colours light gating output module is connected, and,
The output end of energy control module is set to be connected with the input of multiple target primary colours light gating output module,
The output end of multiple target primary colours light gating output module is connected with blue light emitting unit, to pass through the enabled letter of logic Number, the primary lights brightness regulated signal that Regulate signal module output end inputs is exported to blue light emitting unit, makes blue light emitting Unit is lighted according to the different primary lights brightness regulated signals of reception；
Further, the primary lights brightness regulated signal of Regulate signal module output comprises at least：
Feux rouges brightness regulated signal, blue light brightness Regulate signal and green glow brightness regulated signal；
Further, the primary lights brightness regulated signal of Regulate signal module output also includes：Gold-tinted brightness regulated signal；
Further, feux rouges brightness regulated signal, green glow brightness regulated signal export to light source and gate control module,
Blue light brightness Regulate signal exports to multiple target primary lights and gates output module；
Further, gold-tinted brightness regulated signal exports to multiple target primary lights and gates output module；
Further, the output end of light source gating control module is connected to the input of multiple target primary colours light gating output module End, for that accordingly primary lights brightness regulated signal will be exported according to light source type gate control signal to the choosing of multiple target primary lights Logical output module；
Further, time-sequence control module includes：First primary lights time-sequence control module, the second primary lights SECO mould Block and three primary colours light time-sequence control module, the first primary lights timing control signal, the second primary lights SECO are exported respectively Signal and three primary colours light timing control signal, and export to corresponding primary lights output module；
Further, in addition to detection module, the brightness for detecting primary lights in light source optical path changes, and feeds back to tune Signaling module is saved, Regulate signal module exports each primary lights brightness regulated signal according to the control of default white balance.
The beneficial effect that above example technical scheme of the present invention is brought is：The projection light source wwhite balance control circuit passes through Regulate signal module exports primary lights brightness regulated signal, and light source gates control module according to the light source type of gating, will adjusted The primary lights brightness regulated signal of signaling module output is exported to different primary lights output modules, different primary colours light output moulds The corresponding different light source type of block combination, enabled control signal of the time-sequence control module based on each primary lights generate each primary colours luminous point Bright clock signal so that each primary lights output module lights clock signal and corresponding primary colours brightness tune according to each primary lights The primary lights of signal output corresponding brightness are saved, complete the adjustment of the white balance of light source.
Projection light source wwhite balance control circuit provided in an embodiment of the present invention, the white balance of a variety of projection light sources can be applicable Adjustment, the compatibility and versatility of projection light source wwhite balance control circuit are realized, add projection light source blank level adjustment electricity The scope of application on road.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, make required in being described below to embodiment Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings Accompanying drawing.
Figure 1A is the structural representation for the projection light source wwhite balance control circuit that the embodiment of the present invention one provides；
Figure 1B is the structural representation for the another projection light source wwhite balance control circuit that the embodiment of the present invention one provides；
Fig. 2A is a kind of structural representation for projection light source wwhite balance control circuit that the embodiment of the present invention two provides；
Fig. 2 B are the structural representations for another projection light source wwhite balance control circuit that the embodiment of the present invention two provides；
Fig. 3 is the structural representation for the projection light source wwhite balance control circuit that the embodiment of the present invention three provides；
Fig. 4 A, Fig. 4 B, Fig. 4 C are three kinds of light source primary colours sequential export schematic diagrames that the embodiment of the present invention three provides respectively.
Embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention Formula is described in further detail.
Embodiment one,
Figure 1A is a kind of structural representation for projection light source wwhite balance control circuit that the embodiment of the present invention one provides, referring to Figure 1A, the projection light source wwhite balance control circuit include Regulate signal module 1, light source gating control module 2, make energy control module 3rd, time-sequence control module 4, the first primary lights output module 5, the second primary lights output module 6 and three primary colours light output module 7.
Wherein, Regulate signal module 1 exports primary lights brightness regulated signal, and the output end of Regulate signal module 1 is selected with light source The input connection of logical control module 2, the output end and the first primary lights output module 5, the second base of light source gating control module 2 The input of coloured light output module 6 and three primary colours light output module 7 connects respectively, with by inputting light source type gating control Signal and lighting control signal D（Not shown in figure）, the primary lights brightness regulated signal of the output end of Regulate signal module 1 is exported Into the first primary lights output module 5, the second primary lights output module 6 or three primary colours light output module 7.
The output end of energy control module 3 and the input of time-sequence control module 4, and light source is set to gate control module 2 Input connects respectively, to enable control signal, the enabled letter of generation logic by lighting control signal D and the primary lights of output Number, and the logic enable signal is exported to time-sequence control module 4 and light source respectively and gates control module 2.
The input of time-sequence control module 4 and the output end of Regulate signal module 1 and the output end of light source gating control module 2 Connect respectively, the output end of time-sequence control module 4 and the first primary lights output module 5, the second primary lights output module the 6, the 3rd Primary lights output module 7 connects respectively, with logic-based enable signal and light source type gate control signal, generates primary colours luminous point Bright clock signal, and primary lights are lighted into clock signal and exported respectively to the first primary lights output module 5, second primary lights In output module 6 and three primary colours light output module 7, the first primary lights output module 5, the second primary lights output module 6 and Any one in three primary colours light output module 7 is based on base corresponding to primary lights brightness regulated signal and primary lights brightness regulated signal Primary lights corresponding to the output of coloured light clock signal.
Above-mentioned first primary lights output module 5, the second primary lights output module 6, three primary colours light output module 7 is distinguished defeated Go out the primary lights of different colours.
And in embodiments of the present invention, projection light source type includes monochromatic laser light source, two-color laser and three color laser The light source of light source three types, different light source types is selected by gate control signal so that wwhite balance control circuit is fitted With in different light source type adjustment.
Projection light source wwhite balance control circuit provided in an embodiment of the present invention, it is bright that primary colours are exported by Regulate signal module Regulate signal is spent, light source gates control module according to the light source type of gating, the primary colours brightness that Regulate signal module is exported Regulate signal is exported to different primary lights output modules, the corresponding different light source class of different primary lights output modules combination Type, enabled control signal of the time-sequence control module based on each primary lights generate each primary lights and light clock signal so that each primary colours Light output module exports corresponding brightness according to light clock signal and the corresponding primary lights brightness regulated signal of each primary lights Primary lights, complete the adjustment of the white balance of light source.
Projection light source wwhite balance control circuit provided in an embodiment of the present invention, the white balance of a variety of projection light sources can be applicable Adjustment, the compatibility and versatility of projection light source wwhite balance control circuit are realized, add projection light source blank level adjustment electricity The scope of application on road.
It should be noted that it is effective when involved signal can be high level in embodiments of the present invention, can also For low level when it is effective, the embodiment of the present invention is not specifically limited to this.When in embodiments of the present invention using signal as high level Effectively it is illustrated.
And primary lights enable the primary lights that control signal is used to control light source laser output unit to export.
It is used to control the driving of projection light source wwhite balance control circuit various it should be noted that primary lights light clock signal Light source laser output unit exports the order of primary lights.
And as shown in Figure 1B, the projection light source wwhite balance control circuit of the embodiment of the present invention still further comprises detection Module 8, the brightness for detecting primary lights in light source optical path changes, and feeds back to Regulate signal module 1, Regulate signal module 1 Each primary lights brightness regulated signal is exported according to the control of default white balance.Specifically, detection module 8 can include one or more groups of Luminance sensor, for detecting the brightness change of each primary lights in primary lights output light path, or the brightness of mixed white light becomes Change, and will change gain feedback to Regulate signal module 1, multigroup computing module can be included in Regulate signal module 1, according to increasing Benefit change adjusts each primary lights brightness regulated signal, can be the dutycycle of PWM ripples corresponding to each primary lights specifically.
Projection light source wwhite balance control circuit provided in an embodiment of the present invention, by setting detection module, detect primary lights Exporting change, and change is fed back into front end Regulate signal module, can be quick so as to form closed-loop path for blank level adjustment Change to light source white balance compensates, and improves the efficiency of blank level adjustment, and can be applicable various light sources type, tool There are stronger versatility and compatibility.
Embodiment two,
The embodiment of the present invention two provides a kind of projection light source wwhite balance control circuit, as shown in Figure 2 A, Regulate signal 21 The primary lights brightness regulated signal specifically exported includes：Feux rouges brightness regulated signal R_PWM, blue light brightness Regulate signal B_PWM With green glow brightness regulated signal G_PWM.Wherein, feux rouges brightness regulated signal R_PWM, green glow brightness regulated signal G_PWM are exported Control module is gated to light source, blue light brightness Regulate signal B_PWM is exported to the second primary lights output module.
And further, the primary lights brightness regulated signal that Regulate signal module 21 exports also includes：Gold-tinted brightness is adjusted Save signal Y_PWM.In specific implementation, gold-tinted brightness regulated signal Y_PWM is exported to the second primary lights output module.
Light source gating control module 22 includes primary lights brightness regulated signal input, specifically includes feux rouges brightness regulation letter Number R_PWM, green glow brightness regulated signal G_PWM, and the first feux rouges enable control signal R0_EN, and also have master control letter Number input is used to input lighting control signal D.
Light source gating control module 22 includes light source type gate control signal input, and the input has three inputs Pin, the various combination of three input pins can be used for distinguishing different light source types to be selected.Specifically, light source type Gate control signal includes the first light source type gate control signal end A, secondary light source type gate control signal end B and the 3rd Light source type gate control signal end C.
Wherein, when CBA logical combinations are 001, light source type is monochromatic laser light source, when CBA logical combinations are 100 When, light source type is two-color laser light source, and when CBA logical combinations are 110, light source type is three color LASER Light Sources.
And second primary lights output module include blue light emitting unit, in particular blue laser 261, send indigo plant Light, and blue light control unit 262, for according to sequential signal during blue primaries light and blue primaries brightness Regulate signal to indigo plant Color laser, which is driven, to be lighted.
And first primary lights output module 25 include red light-emitting unit, in particular red laser 251, send Feux rouges, and feux rouges control unit 252, for according to feux rouges primary lights clock signal and feux rouges primary lights brightness regulated signal pair Red laser, which is driven, to be lighted.
And three primary colours light output module 27 includes green luminescence unit, in particular green laser 271, sends Green glow, and green glow control unit 272, for according to green glow primary lights clock signal and green glow primary lights brightness regulated signal pair Green laser, which is driven, to be lighted.
Specifically, in fig. 2, blue laser 261, red laser 262, green laser 263 show respectively with B, R, G。
And second primary lights output module also include multiple target primary colours light gating output module 263, wherein, multiple target Primary colours light gating output module 263 is connected with blue light control unit 262.
Wherein, blue light control unit 262 specifically, for according to blue light clock signal and multiple target primary colours light gating output The target primary colours brightness signal of the selection output of module 263 changes into blue primaries brightness Regulate signal, and then specific driving Blue laser lights output.
And input of the output end of Regulate signal module 21 also with multiple target primary colours light gating output module 263 is connected, And the output end of energy control module 23 is set to be connected with the input of multiple target primary colours light gating output module 263.Specifically, adjust The gold-tinted brightness regulated signal that section signaling module 21 exports, which is exported to multiple target primary lights, gates output module 263.
And the output end of light source gating control module 22 is connected to the defeated of multiple target primary colours light gating output module 263 Enter end, for that accordingly primary lights brightness regulated signal will be exported according to light source type gate control signal to multiple target primary lights Gate output module 263, specifically, it is determined that a kind of light source type when, feux rouges brightness regulated signal R_PWM, green glow is bright Degree Regulate signal G_PWM is exported to multiple target primary colours light gating output module 263.
And energy control module 23 is set to include four groups of enabled input signals, R0_EN, R_EN, B_EN, G_EN, difference respectively Represent the first red enabled control signal, the second red enabled control signal, the enabled control signal of blueness, the enabled control letter of green Number, and one group of lighting control signal D input, wherein lighting control signal D be used to receive and (do not show in figure from central controller Go out) lighting control signal D, and this signal input light source gating and is made into energy control module at control module, as public control Signal carries out the control of more control modules.
Energy control module 23 is set to include multiple logic gates, specifically as shown in Figure 2 A, including the first logic gates 231, for the second red output control signal R_EN and lighting control signal D to be carried out into phase and rear output.Second gate electricity Exported behind road 232, for green output control signal G_EN and lighting control signal D to be carried out into phase and rear output.3rd logic Gate circuit 233, for blue output control signal B_EN and lighting control signal D to be carried out into phase and rear output.
Specifically, the above-mentioned logic enable signal after logic gates logical operation is separately input into SECO mould Block 24 and multiple target primary colours gating output module 263.
Time-sequence control module 24 specifically includes the first primary lights time-sequence control module 241, the second primary lights SECO Module 242 and three primary colours light time-sequence control module 243, the first primary lights timing control signal, the second primary lights are exported respectively Timing control signal and three primary colours light timing control signal, and export to corresponding primary lights output control module, specifically, Export to the feux rouges control unit 252 of the first primary lights output module, the blue light control unit of the second primary lights output module 262, and the green glow control unit 272 of three primary colours light output module.
Multiple target primary colours gating output module 263 receives three kinds of logic enable signals for exporting energy control module 23, root Combined according to the low and high level signal of these three logic enable signals, the selective base for inputting the output end of Regulate signal module 21 Coloured light brightness regulated signal, and the primary lights brightness regulated signal of the output of light source gating control module 22 are exported to blue light control Unit 262 processed, and the blue light sequential that blue light control unit 262 then exports according to time-sequence control module 24 lights clock signal, will The primary lights brightness regulated signal of selection is exported to blue laser 261 so that blue laser 261 is according to the different of reception Primary lights brightness regulated signal is lighted.
It should also be noted that, the brightness that feux rouges brightness regulated signal is used to adjust red light-emitting unit output feux rouges is high It is low, and the feux rouges brightness regulated signal could export feux rouges brightness regulated signal to corresponding feux rouges in the case where being not 0 In luminescence unit, with a shiny red, make red laser output red light；Similarly, green glow brightness regulated signal is green for adjusting Light luminescence unit output green glow brightness height, and green glow brightness regulated signal not be 0 in the case of, could be by green glow brightness Regulate signal is exported into corresponding luminescence unit, to light green laser, light source laser output unit is exported green light； And blue light brightness Regulate signal is used to adjust the brightness height that light source laser output unit exports blue light, gold-tinted brightness regulation Signal is used for the brightness height for adjusting output gold-tinted, and green glow brightness regulated signal is used for the brightness height for adjusting output green glow, and In blue light brightness Regulate signal or gold-tinted brightness regulated signal or green glow brightness regulated signal in the case where being not 0, could incite somebody to action Blue light brightness Regulate signal or gold-tinted brightness regulated signal or green glow brightness regulated signal are exported into blue light emitting unit, with point Sapphirine laser, when input is blue light brightness Regulate signal, blue laser is directly luminous, and is output to light source optical path In, and when input is gold-tinted or green glow brightness regulated signal, blue laser is strong according to yellow or Green brightness Regulate signal Degree is lighted, and the blue laser now sent is exposed on colour wheel, excites yellow or green emitting phosphor on colour wheel so that glimmering Light powder is excited to send yellow or green fluorescence, and yellow fluorescence can obtain yellow fluorescence by Partial filtration and part is red glimmering Light, so as to reach the control of control fluorescent brightness by the control to blue laser.
And in embodiments of the present invention, the feux rouges brightness regulated signal, blue light brightness Regulate signal, gold-tinted brightness regulation letter Brightness regulated signal number between green glow brightness regulated signal be can be the same or different, and the embodiment of the present invention is not done to this It is specific to limit.
In one kind is embodied, as shown in Figure 2 B, time-sequence control module specifically includes the first primary lights SECO mould Block 241, the second primary lights time-sequence control module 242, three primary colours light time-sequence control module 243.
Wherein, the second primary colours primary lights time-sequence control module 242 specifically includes the 4th logic sum gate device 2420 and the 5th Logic sum gate device 2421.One input of the 4th logic sum gate device 2420 is for lighting control signal D and the enabled control of green glow Logic enable signal of the signal G_EN phases processed with after, another input are to enable control signal for lighting control signal D and blue light Logic enable signal of the B_EN phases with after, above-mentioned two signal phase or defeated as one of the 5th logic sum gate device 2421 afterwards Enter.And another input of the 5th logic sum gate device 2421 enables control signal R_ for lighting control signal D and the second feux rouges Logic enable signal of the EN phases with after, two input signal phases of the 5th logic sum gate device 2421 or afterwards output to the first primary colours Light sequential control module 241, actually also can be by the second primary lights time-sequence control module 242 and the first primary lights SECO mould Block 241 is regarded as the time-sequence control module to the first primary lights output module jointly, because, the first primary colours light sequential control The input of molding block 241 is the output of the second primary lights time-sequence control module, and the one the first primary lights time-sequence control modules 241 have Body includes an inverter device, i.e. the first primary lights time-sequence control module 241 and the second primary lights time-sequence control module 242 it is defeated Go out anti-phase each other.
Wherein, when the second primary lights timing control signal exported through the second primary lights time-sequence control module 242 is blue light Sequence control signal is inputted to blue light control unit 262, and specifically, blue light control unit 262 is a buffering device, and it is exported all the way To blue light emitting unit B, all the way inverted rear output to green luminescence unit G.
After the signal inversion that first primary lights time-sequence control module 241 exports the second primary lights time-sequence control module 242 Export to red light-emitting unit G.
And three primary colours light time-sequence control module 243 inverter device 2431, is opened by the 6th logic sum gate device 2430 Gating device 2432 is closed to form.Wherein, an input of the 6th logic sum gate device 2430 makes for lighting control signal D with blue light Logic enable signal of the energy control signal B_EN phases with after, another input are enabled and controlled for lighting control signal D and the second feux rouges Logic enable signal of the signal R_EN phases processed with after, the two signal phases or is exported to inverter device 2431, by inverter device afterwards 2431 it is anti-phase after output to switching gate device 2432.Specifically, when the gating signal SEL of switching gate device 2432 is 0, The input signal of its output pin A selection output B1 pins, i.e., the logic enable signal that inverted device 2431 exports, work as gating When signal SEL is 1, the input signal of its output pin A selection output B0 pins, in the present embodiment, B0 ground connection is 0, therefore is drawn Pin A exports low level signal.
In embodiments of the present invention, time-sequence control module is made up of multiple logic circuits, and realizes logic circuit Share, simplify circuit design, improve signal multiplexing rate.
Embodiment three,
The embodiments of the invention provide a kind of projection light source wwhite balance control circuit structural representation, as shown in Figure 3.
It should be noted that light source gating control module 32 is in particular a kind of to open gating device, as shown in figure 3, its Input CBA is combined as gate control signal by different low and high levels so that its input pin a, b, c input point It is not grounded from ax or ay, bx or by, the wherein output of cx pins, cy pins, is always low level output.And its input pin a, b, C is used to input specifically primary lights brightness regulated signal, and the first feux rouges enables control signal.
Wherein, gate control signal C, B, A various combination are used to gate different light source types.For current projection Light source is the situation of LASER Light Source, and altogether including three kinds, one kind is monochromatic laser light source, and one kind is two-color laser light source, and also There are three color LASER Light Sources.
In a kind of products scheme, the projection light source based on DLP frameworks is the output three primary colours light of timing, i.e. R, G, B Three colors are sequentially to export, and form mixed white light in the optical path, reach white balance.No matter which kind of light source type is used, be both needed to Three primary colours time sequence light source is formed in the optical path.
When projection light source is monochromatic laser light source, usually blue laser light source, blue laser light source may act as Primary lights output unit, simultaneously because blue light wavelength is shorter, the green glow and feux rouges longer available for rate of induced polarization blue light wavelength, also make For excitation source unit.Need to coordinate Wavelength converter simultaneously, usually fluorescence colour wheel, it is glimmering to produce green by setting The fluorescent material of light and red fluorescence produces other two kinds of primary lights in addition to blue light, feux rouges and green glow.Fluorescent material is by indigo plant Color laser excitation is changed, and produces the fluorescence with fluorescent material species corresponding color, the output brightness of substantially fluorescence is by swashing The conversion efficiency of the power and fluorescent material of light emitting source in itself together decides on.In certain period of time, it is believed that fluorescent material Conversion efficiency it is stable, the emitting brightness of fluorescence by excitation source power decision.
And in actual applications, because the conversion efficiency of red fluorescence powder is relatively low, it can be replaced using yellow fluorescent powder For red fluorescence powder, using spectra overlapping, by filtered out from yellow fluorescence caused by being excited red fluorescence spectra part from And obtain red fluorescence., therefore, can also be from yellow fluorescence in one kind is embodied because the brightness of yellow fluorescence is higher In, Partial filtration obtains red fluorescence, and member-retaining portion yellow fluorescence, so as to form R, G, B, Y four primary, four primary in light source Compared to traditional three primary colours, gamut range expands, and brightness is also improved.
In embodiments of the present invention, blue laser is as excitation source, therefore either green fluorescence, and red fluorescence is still The output brightness of yellow fluorescence is determined by the power output of blue laser.Blue light emitting unit is blue laser, because This can drive the adjustment reached to blue laser luminous power by carrying out different current duty cycles to blue laser, So as to influence the output brightness of fluorescence indirectly.
Similarly, when projection light source is two-color laser light source, usually blue laser light source and red laser light source, that is, exist Blue laser and red laser have been used in light source.And green primary light or green primary light and chloroaniline coloured light then by Wavelength converter produces, and can be fluorescent species.Similar to the operation principle of monochromatic laser light source, green fluorescence or green Fluorescence and yellow fluorescence excite by blue laser, so as to form R, G, B three primary colours or R, G, B, Y four primary.
When projection light source is three color LASER Light Source, i.e., the three primary colours in projection light source are all using laser, specific bag Blue laser, red laser and green laser are included, pure LASER Light Source has high brightness, high colour gamut, purity height etc. many Advantage.When using pure tri-color laser, fluorescent species can not be used, therefore need not be set again in projection light source light path Wavelength converter is put, certainly, in another kind is embodied, because pure LASER Light Source brings more serious speckle to imitate simultaneously Fruit, addition and wherein a certain or multiple primary colors color identical fluorescent species can be also considered, with average bright by improving picture Spend and make the measure that speckle contrast reduces to mitigate speckle effect, therefore can also be still using blue laser as exciting Light source, and Wavelength converter is set to produce red or green or yellow fluorescence.
Although projection light source is each primary colours of output of timing, the mixing of final each primary colours will form white light, popular Say, brightness ratio of each primary lights in white light determines a kind of white balance.
From background technology, with the use of projection light source, if some lens surfaces in light path have accumulated dust, The decline of light propagation efficiency is then caused, is greatly reduced so as to the brightness of primary lights, and the ratio change of each primary lights may not Together, the colour temperature of whole projected picture is changed, and colour cast occurs for picture, and white balance can be also broken.Therefore, it is necessary to according to each base The brightness situation of change of coloured light, it is adjusted for the primary colours light output circuit of front end, so as to carry out the adjustment of white balance, again Reach white balance state.
In embodiments of the present invention, the adjustment of white balance is realized by adjusting the brightness ratio of each primary lights.Tool Body, as shown in figure 3, including Regulate signal module 31, for exporting or according to detection module（Not shown in figure）Feedback Export each primary lights brightness regulated signal.Adjustment circuit shown in this Fig. 3 is shown each primary lights brightness regulated signal root The course of work to corresponding each primary lights output module is exported respectively according to sequential and light source type.
And as shown in figure 3, projection light source wwhite balance control circuit also includes light source gating control module 32, for root According to gating signal CBA, by a, b, the signal of c input pins exports from from 5 each output pin such as ax, ay respectively, output signal Including including feux rouges brightness regulated signal R1_PWM, R1_PWM, green glow brightness regulated signal G1_PWM, G3_PWM, and, feux rouges Enabled control signal R1_EN.Each primary lights brightness regulated signal export respectively to primary lights output module control unit or Control module is gated, to realize the regulation of the brightness to different base colors light, realizes the adjustment of white balance.As illustrated, feux rouges PWM Signal can selectivity export to feux rouges control unit 352, and then feux rouges control unit 352 lights sequential letter further according to feux rouges Number PWM value is exported to red light-emitting unit 351, red light-emitting unit 351 is specially red laser.Green glow pwm signal can Output module 363, or green glow control unit 372 are gated to multiple target primary colours with exporting for selection, multiple target primary colours gating is defeated It is specially a gating switch device to go out module 363, has gating signal A2A1A0, passes through different groups of gating signal A2A1A0 Close, by the output of input signal selectivity different S2 to S7 to output pin D.Feux rouges control unit 352 and green glow control are single Member 372 is switching gate device, specific to include gating controlling switch SEL, for the height according to SEL incoming level signals It is low, the signal of B0B1 pins is selected to output respectively to output pin A.When green glow selecting unit 372 is used to be lighted according to green glow Green glow PWM value is inputed to green luminescence unit 371 by sequential signal, and green luminescence unit 371 is specifically as follows green laser.
When the timing control signal of above-mentioned each primary lights output module is by making energy control module 33 and the first primary lights Sequence control module 343, the second primary lights time-sequence control module 342, three primary colours light time-sequence control module 341 coordinates jointly Arrive.
Wherein, energy control module 33 is made to distinguish phase by the way that lighting control signal D and each primary lights are enabled into control signal Each primary colours light logic is generated with rear output and enables control signal, on the one hand, these primary colours light logics enable control signal output To the gating signal pin A2A1A0 of multiple target primary colours gating output module 363, for controlling multiple target primary colours gating output mould The output of block 363, on the other hand export respectively to the second primary lights time-sequence control module 342, three primary colours light SECO mould Block 343, blue light lights clock signal and green glow sequential lights clock signal for producing respectively, and feux rouges lights clock signal Light that clock signal is anti-phase to be obtained by blue light.
Blue light control unit 362 is a buffer, blue light can be lighted into clock signal with conditionity and exported to blue light Luminescence unit 361, blue light emitting unit 361 are specially blue laser.
Below by the specifically wwhite balance control circuit with reference to exemplified by accompanying drawing 3, it is based on not with light source gating control module 32 With light source type gating signal when, carry out wwhite balance control circuit working process and principle explanation.
As CBA=001, a roads input feux rouges brightness regulated signal R_PWM of light source gating control module 32（Following letter Claim R_PWM）Ay, i.e. R_PWM=R1_PWM are gated, then the PWM value R_PWM of feux rouges is input to multiple target primary colours gating output module On 363 S5 pins；The b roads input green glow brightness regulated signal G_PWM of light source gating control module 32（Hereinafter referred to as G_PWM） Bx, i.e. G_PWM=G1_PWM are gated, then the PWM value G_PWM of green glow is input to the S3 pipes of multiple target primary colours gating output module 363 On pin；Blue light brightness Regulate signal B_PWM（Hereinafter referred to as B_PWM）It is directly inputted to multiple target primary colours gating output module 363 S2 pins on；Gold-tinted brightness regulated signal Y_PWM（Hereinafter referred to as Y_PWM）It is directly inputted to multiple target primary colours gating output mould On the S7 pins of block 363.
To sum up feux rouges, green glow, blue light, the PWM value of gold-tinted are all input to gating multiple target primary colours gating output module 363 On input pin, now projection light source type is monochromatic laser light source.
In normal operation, lighting control signal D is high, the only lighting control when optical projection system exception or failure Signal processed is low, now closes all LASER Light Sources, and signal control is set for the safeguard protection logic of projection light source system Meter.
Second feux rouges enables control signal R_EN（Hereinafter referred to as R_EN）, green glow enable control signal G_EN（Hereinafter referred to as G_EN）, the defeated enabled control signal B_EN of blue light（Hereinafter referred to as B_EN）It is output to gating multiple target primary colours gating output module 363 Gating pin A2A1A0 on, therefore, controlled by enabled control signal R_EN, G_EN, B_EN of feux rouges, green glow, blue light System gating lights the PWM value and its each color of light output timing of R, G, B, Y of blue laser light source, and this PWM value is that projection light source is defeated The PWM value of the corresponding color gone out, but be by specifically driving blue light emitting unit 361 i.e. blue laser to realize.
As R_EN, G_EN, B_EN=100, i.e., A2A1A0=100, multiple target primary colours gate the output of output module 363 Pin gates S5, and the PWM value B_Laser_PWM for lighting blue laser is the PWM value R_PWM for feux rouges of front end input, now Projection light source system exports feux rouges.
As R_EN G_EN B_EN=010, i.e. A2A1A0=010, the output of multiple target primary colours gating output module 363 is drawn Pin gates S3, and the PWM value B_Laser_PWM for lighting blue laser is the PWM value G_PWM of green glow, and the output of projection light source system is green Light；As R_EN G_EN B_EN=001, i.e. A2A1A0=001 gates S2, lights the PWM value B_Laser_PWM of blue laser For the PWM value B_PWM of blue light, projection light source system output blue light.
As R_EN, G_EN, B_EN=110, i.e., A2A1A0=110, multiple target primary colours gate the output of output module 363 Pin gates S7, and the PWM value B_Laser_PWM values for lighting blue laser are the PWM value Y_PWM of gold-tinted, and system exports gold-tinted.It is comprehensive On, monochromatic laser light source projection light source realizes by the logic selection of color output control signal of feux rouges, green glow, blue light and is System feux rouges, green glow, blue light, the sequential export and the size of each color light output period of gold-tinted, and feux rouges, green glow, blue light and Huang The brightness regulation value PWM of light is exported to blue light emitting unit 361 i.e. blue laser to realize that the different brightness of each color of light are defeated Go out.
Monochromatic laser light source system only includes blue laser, then feux rouges, green glow, gold-tinted are all blue laser conversion or production Raw, therefore blue laser is constantly in illuminating state within a color output cycle.It is blue in one color output cycle The clock signal of lighting of color laser represents with B_Laser_Duty, this signal set with it is a height of effectively, either feux rouges, green glow, Which the color output of blue light, gold-tinted, blue laser lights clock signal B_Laser_Duty should be all effective, then B_Laser_Duty Logical value for R, G, B, Y this four color output control signals logic or.It is implemented as follows：
The c roads of light source gating control module 32 input the first feux rouges and enable control signal R0_EN（Hereinafter referred to as R0_EN）Choosing Logical cx, R0_EN=R1_EN, lighting control signal D is height under normal operating conditions, therefore R1_EN=R_EN=R0_EN, i.e. feux rouges Enabled control signal R_EN is input to 2421 input in the second primary lights time-sequence control module 242,2421 be logic or Gate device.Green glow enables control signal G_EN and blue light enables control signal B_EN and passes through the second primary lights time-sequence control module 2420 logics in 242 or after be input to logic sum gate 2421, then the first feux rouges with being input to 2421 enables control signal R0_ EN carries out the first blue light timing control signal B0_Laser_Duty of logic again or rear formation, the first blue light SECO letter Number B0_Laser_Duty is input in blue light control unit 262, and blue light control unit 262 is a buffering device, therefore the time Source Type gate control signal B=0,2432 device output pin A selected inputs in three primary colours light time-sequence control module 243 B1 logics output 0, i.e. green glow timing control signal G_Laser_Duty is 0, therefore blue light control unit 262 is constantly on, defeated The signal gone out is that blue light lights clock signal B_Laser_Duty, and this signal is feux rouges, green glow, the enabled control signal of blue light R_EN, G_EN, B_EN logic or, control blue laser is lit always within color output cycle, and realize RGBY light of the blue laser within a color output cycle lights sequential.
Schematically, each color of light output timing schematic diagram such as Fig. 4 A in monochromatic laser light source, the cycle is exported in a color Interior each color of light is enabled under control signal logic control by R_EN, G_EN, B_EN color, Sequential output and each color of light it is defeated Go out period size, blue laser is then constantly in illuminating state, is exported with R, G, B, Y color of light distributing order shown in figure Illustrate, the present invention equally can use random color light distributing order output, such as RYGB, RBGY.
And the gate control signal of projection light source system logic output CBA=100 when, represent that projection light source has two kinds LASER Light Source, including blue laser and red laser.
Under projection light source normal operating conditions, the lighting control signal D that projection display system is sent is height.When CBA=100 When, the input of a roads R_PWM gating ax, the i.e. R_PWM=R2_PWM of light source gating control module 32, then the PWM value R_PWM of feux rouges is defeated Enter onto the B1 pins of feux rouges control unit 352, clock signal R_Laser_Duty is lighted by feux rouges（Hereinafter referred to as R_Laser_ Duty）To select control to be output to red light-emitting unit 351 i.e. red laser, red laser output feux rouges, feux rouges are lighted The size of brightness regulated signal R_PWM values determines the brightness height of output feux rouges；The b roads input of light source gating control module 32 G_PWM gates bx, i.e. G_PWM=G1_PWM, then the PWM value G_PWM of green glow is input to multiple target primary colours gating output module 363 S3 pins on；The PWM value B_PWM of blue light is directly inputted on the S2 pins of multiple target primary colours gating output module 363；Gold-tinted PWM value Y_PWM be directly inputted to multiple target primary colours gating output module 363 S7 pins on.
Green glow, blue light, the PWM value of gold-tinted are all input to the input pin of gating multiple target primary colours gating output module 363 On, control gating to light blue laser light source by enabled control signal R_EN, G_EN, B_EN of feux rouges, green glow, blue light PWM value and its each color of light output timings of RGBY, this PWM value are the PWM value of the corresponding color of projection light source output.
As R_EN, G_EN, B_EN=100, i.e., A2A1A0=100, multiple target primary colours gate the output of output module 363 Pin gate S5, for feux rouges export the period, because feux rouges be red laser light source light output without lighting blue laser Device, therefore the PWM value of feux rouges output is not connected to the pipe for the multiple target primary colours gating output module 363 that can light blue laser On pin, blue laser light source is not lit.
As R_EN, G_EN, B_EN=010, i.e., A2A1A0=010, multiple target primary colours gate the output of output module 363 Pin gates S3, and the PWM value B_Laser_PWM for lighting blue laser is the PWM value G_PWM of the green glow of front end input, projected light Source system output green glow.
As R_EN, G_EN, B_EN=001, i.e. A2A1A0=001, multiple target primary colours gating output module 363 it is defeated Go out pin gating S2, the PWM value B_Laser_PWM for lighting blue laser is the PWM value B_PWM of blue light, and projection light source system is defeated Go out blue light.
As R_EN G_EN B_EN=110, i.e. A2A1A0=110, the output of multiple target primary colours gating output module 363 is drawn Pin gates S7, and the PWM value B_Laser_PWM values for lighting blue laser are the PWM value Y_PWM of the gold-tinted of front end input, projected light Source system output gold-tinted.
Green glow, blue light, the output timing of gold-tinted enable control signal to control gating device to export by each color of light, different The brightness size of color of light depends on lighting the PWM value of the respective color of blue laser light source.
The sequential of lighting of red laser and blue laser within a color output cycle is that red laser is lighted When, blue laser is not lighted, i.e., feux rouges export when red laser be lit, blue laser does not work, and green glow, blue light, Blue laser is lit when gold-tinted exports, and red laser does not work, therefore blue laser lights clock signal B_Laser_ Duty be green glow, blue light and the output of gold-tinted color logic or, and red laser lights clock signal R_Laser_Duty and is Blue laser lights clock signal B_Laser_Duty logic NOT.It is implemented as follows：
Green glow enables control signals of the control signal G_EN not only comprising green glow output also to be made comprising gold-tinted output simultaneously Can control signal, therefore green glow enables the logic or, as green glow, indigo plant that control signal G_EN and blue light enable control signal B_EN Light, gold-tinted output logic or.Green glow enables the control signal G_EN and enabled control signal B_EN of blue light and is input to the second primary colours In light sequential control module 242 2420 carry out logics or after, be input to again in the second primary lights of device time-sequence control module 242 2421 with R0_EN carry out logic or, because two-color laser light-source system lead to control signal logics export CBA=100, light source choosing The c roads input R0_EN gating cy of logical control module 32, R0_EN=0, therefore in the second primary lights time-sequence control module 242 2421 blue light of output first lights clock signal B0_Laser_Duty, is green glow output control signal G_EN and blue laser output Control signal B_EN logic or, i.e. green glow, blue light, the logic of gold-tinted output or, this signal B0_Laser_Duty are input to again Blue light control unit 362, now light source type gate control signal B=0, the output pin A selected inputs of blue light control unit 362 B1 exports logical zero, i.e. G_Laser_Duty is 0, and the gating pin of blue light control unit 362 is low, blue light control unit 362 1 Straight conducting, the signal of output is that the second blue light lights clock signal B_Laser_Duty（Hereinafter referred to as B_Laser_Duty）, Blue laser is lighted in the control in green glow, blue light, gold-tinted output of this signal.
First blue light lights clock signal B0_Laser_Duty and carries out logic through three primary colours light time-sequence control module 343 Non-post is that feux rouges lights clock signal R_Laser_Duty（Hereinafter referred to as R_Laser_Duty）Control point shiny red laser, i.e., Feux rouges just exports when green glow, blue light, gold-tinted do not export.B_Laser_Duty and R_Laser_Duty lights that clock signal is a height of to be had Effect, difference control point shiny red and blue laser light source.Its red and blue laser light source is within a color output cycle Time diagram such as Fig. 4 B are lighted, each color light output order is not only limited shown in figure, and be applicable to any output order is System.
And under projection light source normal operating conditions, the lighting control signal D that projection display system is sent is height, is gated Logic output CBA=110 of control signal represent that projection light source now have selected three kinds of LASER Light Sources.Specifically, when CBA=110 When, the input of a roads R_PWM gating ax, the i.e. R_PWM=R2_PWM of light source gating control module 32, then the PWM value R_PWM of feux rouges is defeated Enter onto the B0 pins of feux rouges control unit 352, clock signal R_Laser_Duty is lighted to select to control by red laser System is output to red laser light source, lights red laser light source output feux rouges, the sizes of brightness regulation value R_PWM values determines defeated Go out the brightness height of feux rouges.
B roads input G_PWM gatings by, the i.e. G_PWM=G3_PWM, then green glow of light source gating control module 32 PWM value G_ PWM is input on the B0 pins of green glow light control unit 372, lights clock signal G_Laser_Duty by green glow to control green glow Light control unit 372 gates G3_PWM and lights green luminescence unit 371 i.e. green laser output green glow；The PWM value B_ of blue light PWM is directly inputted on the S2 pins of multiple target primary colours gating output module 363；The PWM value Y_PWM of gold-tinted is directly inputted to more On the S7 pins of target primary colours gating output module 363.Blue light, the PWM value of gold-tinted are to be directly inputted to gating multiple target primary colours On the input pin for gating output module 363, the PWM value of feux rouges and green glow inputs on different gating devices respectively, only red Light and green glow output period are just strobed and are input to LASER Light Source, put light laser.Feux rouges, green glow, the enabled control signal of blue light R_EN, G_EN, B_EN control gating light the PWM value and its each color of light output timing of R, G, B, Y of blue laser, this PWM value is the PWM value of the corresponding color of projection light source output, and R_EN, G_EN, B_EN are that high level is effective.
As R_EN, G_EN, B_EN=100, i.e., A2A1A0=100, multiple target primary colours gate the output of output module 363 Pin gates S5, and the period is exported for feux rouges, because feux rouges is that red laser lights output rather than blue laser, therefore it is red The PWM value of light output is not connected on the pin for the multiple target primary colours gating output module 363 that can light blue laser, but Red laser is lighted on the B0 pins of gating feux rouges control unit 352, blue laser is not lit.
As R_EN, G_EN, B_EN=010, i.e., A2A1A0=010, multiple target primary colours gate the output of output module 363 Pin gates S3, and the period is exported for green glow, because green glow is that green laser light source lights output rather than blue laser light source, because The PWM value of this green glow output is not connected to the pin for the multiple target primary colours gating output module 363 that can light blue laser light source On, but gate on the B0 pins of green glow control unit 372 to light green laser, blue laser light source is not lit.
As R_EN, G_EN, B_EN=001, i.e., A2A1A0=001, multiple target primary colours gate the output of output module 363 Pin gates S2, and the PWM value B_Laser_PWM for lighting blue laser is the PWM value B_PWM of blue light, and system exports blue light.
As R_EN G_EN B_EN=110, i.e. A2A1A0=110, the output of multiple target primary colours gating output module 363 is drawn Pin gates S7, and the PWM value B_Laser_PWM values for lighting blue laser are the PWM value Y_PWM of gold-tinted, and system exports gold-tinted.
Feux rouges is only produced when red laser light source is lighted, green laser light source and blue laser light source do not work, i.e. green glow, indigo plant Feux rouges exports when light, gold-tinted do not export, therefore the clock signal R_Laser_Duty that lights of red laser is controlled for green glow is enabled Signal G_EN and blue light processed enable control signal B_EN logic or after it is negated again.R_Laser_Duty, G_EN, B_EN are It is that high level is effective, not only further comprises gold-tinted comprising the green glow output period when wherein G_EN is high exports the period, and B_EN is Only include the blue laser output period when high, G_EN and B_EN logics or after then contain green glow, gold-tinted, blue laser output period, then pass through It is the feux rouges output period after logic NOT, i.e. R_Laser_Duty red lasers light clock signal.
Green glow is only produced when green laser is lighted, red laser and blue laser do not work, i.e. feux rouges, blue light, Huang Green glow exports when light does not export, therefore the clock signal G_Laser_Duty that lights of green laser is feux rouges output control signal R_EN and blue laser output control signal B_EN logic or after it is negated again.G_Laser_Duty, R_EN, B_EN are a height of to have Imitate, not only further comprises gold-tinted comprising the feux rouges output period when wherein R_EN is high exports the period, and indigo plant is only included when B_EN is high The light output period, R_EN and B_EN logics or after then contain feux rouges, gold-tinted, blue laser output period, then be after logic NOT Green glow exports the period, i.e. G_Laser_Duty green lasers light clock signal.
Blue light and gold-tinted, red laser light source and green laser when blue laser is lighted are produced when blue laser is lighted Device is not lighted.Green glow enable control signal G_EN and blue light enable control signal B_EN logic or after, contain green glow, Huang The output period of light and blue light, the green laser that the period is exported using green glow light clock signal G_Laser_Duty to control choosing Logical G_EN and B_EN logics or after signal, i.e., when G_Laser_Duty for it is high when, the system output green glow period, do not gate G_EN With B_EN logics or after signal, then can G_EN and B_EN logics or after signal in the green glow period filter, do not input To blue laser light source, only the clock signal control blue laser light source of the output period of surplus gold-tinted and blue light is lighted.Its is specific Implementation is as follows：
Three color laser source systems lead to logic output CBA=110 of control signal, and the c roads of light source gating control module 32 are defeated Enter R0_EN gating cy, R0_EN=0, therefore 3421 output signal B0_ in the second primary lights time-sequence control module 342 Laser_Duty is the logic or, i.e. green glow, blue light, Huang that green glow output control signal G_EN and blue light enable control signal B_EN The logic of light output or, this signal B0_Laser_Duty are red after the first primary lights time-sequence control module 343 carries out logic NOT Color LASER Light Source lights clock signal R_Laser_Duty control points shiny red laser, i.e., when green glow, blue light, gold-tinted do not export Feux rouges just exports.
Light source type gate control signal B=1 when therefore, the output pin A selected inputs B1 of green glow control unit 372 outputs Logic green glow PWM value G_PWM.The enabled control signal R_EN of red and the enabled control signal B_EN of blueness are through three primary colours light sequential 3410 device logics in control module 341 or after, i.e., feux rouges, gold-tinted, the logic of blue laser output or, again through three primary colours light when After 3411 in sequence control module 341 carry out logic NOTs, input switch gating device 3412, now B=1, therefore 3412 output is drawn Pin A is that the green glow of green glow output period lights clock signal G_Laser_Duty（Hereinafter referred to as G_Laser_Duty）, control Green laser is lighted, i.e., green glow just exports when green feux rouges, gold-tinted, blue light do not export.
The gating pin SEL of G_Laser_Duty connection green glows control unit 372 can control the choosing of green glow control unit 372 It is logical, the input of green glow control unit 372 for green glow G_EN and blue light B_EN output control signals logic or, contain green glow, The control signal of gold-tinted, blue laser output, it is that green glow exports the period when G_Laser_Duty is high, feux rouges control unit 352 is not Conducting, the output of blue light control unit 363 is logical zero, is that green glow does not export period, feux rouges control when G_Laser_Duty is low Unit 352 processed turns on, and the output of blue light control unit 363 is the control signal of gold-tinted and blue laser output, as blue laser light Blue laser light source is lighted in the bright clock signal B_Laser_Duty of source point, the control in blue light, gold-tinted output of this signal.Thirdly color LASER Light Source and each color of light output timing schematic diagram are as shown in Figure 4 C.
To sum up, in the embodiment three according to Fig. 3, the projection light source wwhite balance control circuit can be by Regulate signal mould Each primary lights brightness regulated signal of block, by making the enabled control of energy control module, from light source gating control module, multiple target The pwm signal of each primary colours is exported the control unit to each primary lights output module by primary colours gating output module respectively, and is coordinated Primary lights time-sequence control module is realized from red light-emitting unit, blue light emitting unit to the timing control signal of each primary lights, green The output of light luminescence unit timing, realized especially by driving laser and light output.And in invention is implemented, pass through Light source type gate control signal can select the light source type that the wwhite balance control circuit acts on, so as to realize at least one LASER Light Source, such as the drive control of monochromatic laser light source or two-color laser light source or three color LASER Light Sources, that is to say, the present invention The projection light source wwhite balance control circuit that embodiment provides, it can select to connect so as to be applicable a variety of LASER Light Source combinations Drive control, and then the compatibility and versatility of projection light source wwhite balance control circuit are realized, add projection light source and put down in vain The scope of application for the adjustment circuit that weighs.
In several embodiments provided herein, it should be understood that disclosed system, apparatus and method can be with Realize by another way.For example, device embodiment described above is only schematical, for example, the unit Division, only a kind of division of logic function, can there is other dividing mode, such as multiple units or component when actually realizing Another system can be combined or be desirably integrated into, or some features can be ignored, or do not perform.It is another, it is shown or The mutual coupling discussed or direct-coupling or communication connection can be the indirect couplings by some interfaces, device or unit Close or communicate to connect, can be electrical, mechanical or other forms.
The unit illustrated as separating component can be or may not be physically separate, show as unit The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs 's.
In addition, each functional unit in each embodiment of the present invention can be integrated in a processing unit, can also That the independent physics of unit includes, can also two or more units it is integrated in a unit.Above-mentioned integrated list Member can both be realized in the form of hardware, can also be realized in the form of hardware adds SFU software functional unit.
The above-mentioned integrated unit realized in the form of SFU software functional unit, can be stored in one and computer-readable deposit In storage media.Above-mentioned SFU software functional unit is stored in a storage medium, including some instructions are causing a computer Equipment（Can be personal computer, server, or network equipment etc.）Perform the portion of each embodiment methods described of the present invention Step by step.And foregoing storage medium includes：USB flash disk, mobile hard disk, read-only storage（Read-Only Memory, referred to as ROM）, random access memory（Random Access Memory, abbreviation RAM）, magnetic disc or CD etc. are various to store The medium of program code.
Finally it should be noted that：The above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although The present invention is described in detail with reference to the foregoing embodiments, it will be understood by those within the art that：It still may be used To be modified to the technical scheme described in foregoing embodiments, or equivalent substitution is carried out to which part technical characteristic； And these modification or replace, do not make appropriate technical solution essence depart from various embodiments of the present invention technical scheme spirit and Scope.

Claims (9)

1. a kind of projection light source wwhite balance control circuit, it is characterised in that the adjustment circuit includes Regulate signal module, light source Gating control module, make energy control module, time-sequence control module, the first primary lights output module, the second primary lights output module With three primary colours light output module；
The Regulate signal module exports primary lights brightness regulated signal；The Regulate signal module output end is selected with the light source The input connection of logical control module；
The output end of light source gating control module and the first primary lights output module, the second primary lights output module and The input of three primary colours light output module connects respectively, with by inputting light source type gate control signal and lighting control letter Number, by the primary lights brightness regulated signal of the Regulate signal module output end export to the first primary lights output module, In the second primary lights output module or three primary colours light output module；
It is described to make the output end of energy control module and the input of the time-sequence control module and light source gating control module Input connect respectively, enable control signal, the enabled letter of generation logic to pass through the primary lights of lighting control signal and output Number, and the logic enable signal is exported to the time-sequence control module and the light source respectively and gates control module；
The input of the time-sequence control module gates control module with the Regulate signal module output end and the light source Output end connects respectively, and the output end of the time-sequence control module and the first primary lights output module, the second primary lights are defeated Go out module, three primary colours light output module connects respectively, with based on the logic enable signal and the light source type gating control Signal processed, generation primary lights light clock signal, and the primary lights are lighted into clock signal and exported respectively to first base In coloured light output module, the second primary lights output module and three primary colours light output module, the first primary colours light output Any one in module, the second primary lights output module and three primary colours light output module is adjusted based on the primary colours brightness Save primary lights corresponding to primary lights clock signal output corresponding to signal and the primary lights brightness regulated signal；
The first primary lights output module includes red laser, and the second primary lights output module includes blue laser Device, the three primary colours light output module include green laser.
2. projection light source wwhite balance control circuit according to claim 1, it is characterised in that second primary lights are defeated Going out module includes multiple target primary colours light gating output module,
Input of the Regulate signal module output end also with the multiple target primary colours light gating output module is connected, and,
The output end for making energy control module is connected with the input of the multiple target primary colours light gating output module,
The output end of the multiple target primary colours light gating output module is connected with the blue laser, to be made by the logic Energy signal, the primary lights brightness regulated signal that the Regulate signal module output end inputs is exported to the blue laser, The blue laser is set to be lighted according to the different primary lights brightness regulated signals of reception.
3. projection light source wwhite balance control circuit according to claim 2, it is characterised in that the Regulate signal module The primary lights brightness regulated signal of output comprises at least：
Feux rouges brightness regulated signal, blue light brightness Regulate signal and green glow brightness regulated signal.
4. projection light source wwhite balance control circuit according to claim 3, it is characterised in that the Regulate signal module The primary lights brightness regulated signal of output also includes：Gold-tinted brightness regulated signal.
5. projection light source wwhite balance control circuit according to claim 3, it is characterised in that the feux rouges brightness regulation Signal, green glow brightness regulated signal export to the light source and gate control module,
The blue light brightness Regulate signal is exported to the multiple target primary colours light gating output module.
6. projection light source wwhite balance control circuit according to claim 4, it is characterised in that the gold-tinted brightness regulation Signal output is to the multiple target primary colours light gating output module.
7. projection light source wwhite balance control circuit according to claim 2, it is characterised in that the light source gating control The output end of module is connected to the input of the multiple target primary colours light gating output module, for being selected according to the light source type Logical control signal accordingly primary lights brightness regulated signal will be exported to the multiple target primary colours light gating output module.
8. projection light source wwhite balance control circuit according to claim 1, it is characterised in that the time-sequence control module Including：First primary lights time-sequence control module, the second primary lights time-sequence control module and three primary colours light time-sequence control module, point The first primary lights timing control signal, the second primary lights timing control signal and three primary colours light timing control signal are not exported, And export to corresponding primary lights output module.
9. projection light source wwhite balance control circuit according to claim 1, it is characterised in that also including detection module, use Change in the brightness for detecting primary lights in light source optical path, and feed back to the Regulate signal module, the Regulate signal module root Each primary lights brightness regulated signal is exported according to the control of default white balance.
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CN201610745274.2A Active CN106249530B (en) 2016-06-30 2016-08-29 Projection light source drive control circuit
CN201810024325.1A Active CN108267918B (en) 2016-06-30 2016-08-29 Projection light source drive control circuit
CN201610768674.5A Active CN106226983B (en) 2016-06-30 2016-08-30 projection light source drive control circuit
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CN108333857B (en) 2021-03-09
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CN206209269U (en) 2017-05-31
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