CN102455576A - Projecting apparatus - Google Patents
Projecting apparatus Download PDFInfo
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- CN102455576A CN102455576A CN2010105269444A CN201010526944A CN102455576A CN 102455576 A CN102455576 A CN 102455576A CN 2010105269444 A CN2010105269444 A CN 2010105269444A CN 201010526944 A CN201010526944 A CN 201010526944A CN 102455576 A CN102455576 A CN 102455576A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
- Y02B20/40—Control techniques providing energy savings, e.g. smart controller or presence detection
Abstract
The invention relates to a projecting apparatus which comprises an illumination unit, a brightness detection circuit, a signal conversion circuit and a control unit, wherein the illumination unit generates a light source with reference to multiple driving signals and provides temperature sensing signals with reference to the temperature of the light source; the brightness detection circuit generates multiple brightness sensing signals; the signal conversion circuit converts the temperature sensing signals and the brightness sensing signals into temperature information and multiple brightness information; the control unit comprises a set window which records preset temperature information and multiple preset brightness information; and the control unit adjusts the driving signals, so that adjusted temperature information and the brightness information conform to the information in the set window.
Description
Technical field
The invention relates to a kind of projection arrangement, and particularly relevant for a kind of projection arrangement with Light source correction.
Background technology
Projection arrangement is the portable projector that weight is lower, volume is less; Mainly be divided into minitype projection machine and pouch-type projector; Wherein pocket projector is similar with traditional projector, but comparatively compact, the person of being easy to use carries; Minitype projection machine is then more frivolous, can be integrated among the running gears such as mobile phone, digital camera.
The present employed micro projection technology of minitype projection machine mainly is divided into liquid crystal display (LiquidCrystal Display; Be called for short LCD) technological, digital light processing (Digital Light Processing; DLP) technology, liquid crystal on silicon show (Liquid crystal on silicon; LCoS) technology and micro electronmechanical (MicroElectro Mechanical Systems is called for short MEMs) miniscanning device (MicroScanner) etc. are 4 kinds.
The light source of projection arrangement mainly is divided into RGB light emitting diode (Light Emitting Diode is called for short LED), white light emitting diode or LASER Light Source (laser).In little optical projection system, in order to make the color color rendering bigger, a large amount of recently technology of using look preface methods (color sequential), and with the light emitting diode of R, G, three kinds of colors of B as light source to increase the rich of color.Yet, can come greatlyyer than the variability of solid color LED by the specification that three kinds of color LED combine, and LED can change its wavelength and brightness with temperature, therefore can cause the deviation of white balance.
Summary of the invention
The present invention provides a kind of projection arrangement, can under correction mode, set up one according to external control information and set forms, and the forms calibration light source is set in reference under feedback mode control, and keep the white balance of light source by this.
The present invention proposes a kind of projection arrangement, comprises lighting unit, luminance detection circuit, signaling conversion circuit and control module.Lighting unit produces light source with reference to a plurality of drive signals, and with reference to the temperature of light source temperature sensing signal is provided.The brightness of luminance detection circuit detection light source is to produce a plurality of brightness sensing signals.Signaling conversion circuit converts temperature sensing signal and these brightness sensing signals to a temperature information and a plurality of monochrome information.Control module comprises that one sets forms, and sets forms and writing down a preset temperature information and a plurality of preset monochrome information.Wherein, these drive signals of control module adjustment are so that adjusted temperature information and these monochrome informations meet the information of setting in the forms.
In one embodiment of this invention, above-mentioned control module comprises light source drive and microcontroller.Light source drive is according to these drive signals of activation bit adjustment, with the light source adjustment to white balance mode.Microcontroller produces activation bit according to external control information under correction mode, and temperature information and these monochrome informations that will meet white balance mode are recorded in and set in the forms.In addition, microcontroller is under feedback mode control, and forms are set in the reference temperature(TR) information inquiry, and produce activation bit according to Query Result.
In one embodiment of this invention, above-mentioned lighting unit comprises light emitting diode matrix and temperature-sensitive sticker.Light emitting diode matrix provide first coloured light, second coloured light, with the 3rd coloured light, with synthesized source.The temperature of temperature-sensitive sticker sensing first to the 3rd coloured light is to produce temperature sensing signal.
In one embodiment of this invention, above-mentioned luminance detection circuit comprises a plurality of color sensors, current-to-voltage convertor and integrator.Under the first integral pattern, these color sensors are switched on simultaneously, detect in proper order with the generation that cooperates first to the 3rd coloured light.Under the second integral pattern, these color sensors are switched on a Preset Time in regular turn, with pin first to the 3rd coloured light are detected.In addition, these color sensors produce a plurality of current sensors according to testing result.Current-to-voltage convertor converts these current sensors to a plurality of sensing voltages.Integrator cooperates first integral pattern or second integral pattern that these sensing voltages are carried out integration, to produce these brightness sensing signals.
Based on above-mentioned, the present invention sets up one through correction mode to set forms before device dispatches from the factory.By this, when the projection arrangement practical operation, control module can pass through feedback mode control, come calibration light source with reference to the white balance parameter of setting in the forms.By this, can keep the white balance of light source, and then improve the display quality of image.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphic elaborating as follows.
Description of drawings
Fig. 1 is the configuration diagram according to the projection arrangement of one embodiment of the invention.
Fig. 2 is for carrying out the sequential chart of short time integration in order to the explanation luminance detection circuit.
Fig. 3 A to Fig. 3 C is respectively the sequential chart that carries out long-time integration in order to the explanation luminance detection circuit.
Fig. 4 is the configuration diagram according to the projection arrangement and the external control circuit of one embodiment of the invention.
Fig. 5 A and Fig. 5 B are according to the monochrome information of one embodiment of the invention curve map with respect to temperature information.
Fig. 6 A and Fig. 6 B are respectively according to the electric current of monochrome information of one embodiment of the invention and the light emitting diode curve map with respect to the time.
Fig. 7 A and Fig. 7 B are the curve map of the monochrome information of foundation another embodiment of the present invention with respect to temperature information.
Fig. 8 A and Fig. 8 B are respectively according to the electric current of the monochrome information of another embodiment of the present invention and the light emitting diode curve map with respect to the time.
Fig. 9 A to Fig. 9 C is the curve map of the monochrome information of a foundation embodiment more of the present invention with respect to temperature information.
Figure 10 A and Figure 10 B are respectively according to the electric current of the monochrome information of an embodiment more of the present invention and the light emitting diode curve map with respect to the time.
Figure 11 is the partial circuit synoptic diagram according to the projection arrangement of one embodiment of the invention.
[main element label declaration]
100: projection arrangement 110: lighting unit
120: display unit 130: control module
111: light emitting diode matrix 112: temperature-sensitive sticker
141～143: light emitting diode STM: temperature sensing signal
121: signaling conversion circuit 122: luminance detection circuit
151: analog-to-digital converter 152: multiplexer
161: integrator 162: current-to-voltage convertor
171～173: color sensor SC1～SC3: current sensor
SV1～SV3: sensing voltage SB1～SB3: brightness sensing signal
FTM: temperature information FB1～FB3: monochrome information
131: time schedule controller 132: microcontroller
133: light source drive D11: picture data
FDR: activation bit DR1～DR3: drive signal
T21～t26, t31～t33: time point 410: main frame
420: color instrument FCT: external control information
OP1: operational amplifier R1, R2: resistance
C1: electric capacity RS1: thermistor
Embodiment
Fig. 1 is the configuration diagram according to the projection arrangement of one embodiment of the invention.As shown in Figure 1, projection arrangement 100 comprises a lighting unit 110, a display unit 120 and a control module 130.Wherein, lighting unit 110 can produce light source, and control module 130 then can produce picture data D11.By this, display unit 120 can produce image with reference to picture data D11 under the irradiation of light source.
Further, lighting unit 110 comprises a light emitting diode matrix 111 and a temperature-sensitive sticker 112.Wherein, light emitting diode matrix 111 is made up of a plurality of light emitting diode.For example, in a preferred embodiment, light emitting diode matrix 111 comprises a plurality of light emitting diodes 141～143.Wherein, (for example: ruddiness), (for example: green glow), and light emitting diode 143 is in order to provide the 3rd coloured light (for example: blue light) in order to second coloured light to be provided for light emitting diode 142 in order to first coloured light to be provided for light emitting diode 141.By this, light emitting diode matrix 111 can be through the required light source of first to the 3rd coloured light composite projection device 100.On the other hand, the temperature of temperature-sensitive sticker 112 meeting sensings first to the 3rd coloured light, and produce temperature sensing signal STM according to this.
Then, current-to-voltage convertor 162 can convert current sensor SC1～SC3 to sensing voltage SV1～SV3.161 of integrators are that sensing voltage SV1～SV3 is carried out integration, to produce brightness sensing signal SB1～SB3.On the other hand, with regard to signaling conversion circuit 121, multiplexer 152 can receive temperature sensing signal STM and brightness sensing signal SB1～SB3, and output temperature sensing signal STM and brightness sensing signal SB1～SB3 one by one.In addition, the signal that analog-to-digital converter 121 can be exported multiplexer 152 converts numerical information one by one to, to produce corresponding temperature information FTM and monochrome information FB1～FB3.
It should be noted that color sensor 171～173 can have different conduction modes under different patterns, can carry out short time or long integration with the integrator 161 that causes the rear end.Relatively; Difference along with integral way; The size of the electric current of light emitting diode 141～143 or work period (duty cycle), just the amplitude of drive signal DR1～DR3 or the size of work period can be differentiated with reference to monochrome information FB1～FB3.
For instance, Fig. 2 is for carrying out the sequential chart of short time integration in order to the explanation luminance detection circuit.With reference to Fig. 2; Drive signal DR1～DR3 is respectively in order to driven for emitting lights diode 141～143; Therefore light emitting diode 141～143 can be switched in turn, with produce in regular turn first coloured light (for example: ruddiness R), second coloured light (for example: green glow G), with the 3rd coloured light (for example: blue light B).What be worth living meaning is that under the situation of short time integration, just under the first integral pattern, color sensor 171～173rd is switched on simultaneously.By this, (for example: when ruddiness R) producing, color sensor 171 will produce corresponding sensing electric current SC1 when first coloured light.Then, (for example: when green glow G) producing, color sensor 172 will produce corresponding sensing electric current SC2, and (for example: when blue light B) producing, color sensor 173 will produce relative current sensor SC3 when the 3rd coloured light when second coloured light.
In other words, along with the generation in regular turn of first to the 3rd coloured light, current-to-voltage convertor 162 will produce sensing voltage SV1～SV3 in regular turn.Relatively, integrator 161 can produce brightness sensing signal SB1～SB3 in regular turn, and transmits brightness sensing signal SB1～SB3 through multiplexer 152 and give analog-to-digital converter 121.By this, analog-to-digital converter 121 will be respectively at time point t21～t26 sampling brightness sensing signal SB1～SB3, and monochrome information FB1～FB3 according to this.What deserves to be mentioned is that the numerical value change of monochrome information FB1～FB3 can be reacted the oscillation amplitude change of drive signal DR1～DR3, the just change in current of light emitting diode 141～143 at this moment.
Fig. 3 A to Fig. 3 C is respectively the sequential chart that carries out long-time integration in order to the explanation luminance detection circuit.What be worth living meaning is that under the situation of long-time integration, just under the second integral pattern, color sensor 171～173rd is switched on a Preset Time in regular turn.Therefore, when 171 conductings of color sensor, color sensor 172 and 173 will be closed.At this moment, shown in Fig. 3 A, along with the generation in regular turn of first to the 3rd coloured light, only first coloured light (for example: ruddiness R) can be converted into corresponding current sensor SC1 through color sensor 171.Relatively; In the Preset Time of color sensor 171 conductings; Current-to-voltage convertor 162 can produce sensing voltage SV1 constantly, carries out long integration to cause 161 couples of sensing voltage SV1 of integrator, and then produces the brightness sensing signal SB1 shown in Fig. 3 A.In addition, the analog-to-digital converter 121 of this moment will be in time point t31 sampling brightness sensing signal SB1, and monochrome information FB1 according to this.
Relatively, when 172 conductings of color sensor, color sensor 171 and 173 will be closed.At this moment, shown in Fig. 3 B, along with the generation in regular turn of first to the 3rd coloured light, only second coloured light (for example: green glow G) can be converted into corresponding current sensor SC2 through color sensor 172.Relatively; In the Preset Time of color sensor 172 conductings; Current-to-voltage convertor 162 can produce sensing voltage SV2 constantly, carries out long integration to cause 161 couples of sensing voltage SV2 of integrator, and then produces the brightness sensing signal SB2 shown in Fig. 3 B.In addition, the analog-to-digital converter 121 of this moment will be in time point t32 sampling brightness sensing signal SB2, and monochrome information FB2 according to this.
Moreover when 173 conductings of color sensor, color sensor 171 and 172 will be closed.At this moment, shown in Fig. 3 C, along with the generation in regular turn of first to the 3rd coloured light, only the 3rd coloured light (for example: blue light B) can be converted into corresponding current sensor SC3 through color sensor 173.Relatively; In the Preset Time of color sensor 173 conductings; Current-to-voltage convertor 162 can produce sensing voltage SV3 constantly, carries out long integration to cause 161 couples of sensing voltage SV3 of integrator, and then produces the brightness sensing signal SB3 shown in Fig. 3 C.In addition, the analog-to-digital converter 121 of this moment will be in time point t33 sampling brightness sensing signal SB3, and monochrome information FB3 according to this.
In other words, under the second integral pattern, color sensor 171～173 can be switched on simultaneously, detects in proper order with the generation that cooperates first to the 3rd coloured light.In addition, under the second integral pattern, color sensor 171～173 can be switched on a Preset Time in regular turn, with pin first to the 3rd coloured light is detected.In addition, along with the difference of the conduction mode of color sensor 171～173, integrator 161 can carry out short time or integration for a long time.Wherein, under the first integral pattern, integrator 161 will carry out the integration of short time, so the numerical value change of monochrome information FB1～FB3 can react the oscillation amplitude change of drive signal DR1～DR3, just the change in current of light emitting diode 141～143.In addition; Under the second integral pattern; Integrator 161 will carry out long integration, so the numerical value change of monochrome information FB1～FB3 can be reacted the amplitude of drive signal DR1～DR3 or the variation of work period, the electric current of light emitting diode 141～143 or the variation of work period just.
Please continue with reference to Fig. 1, temperature information FTM and monochrome information FB1～FB3 that signaling conversion circuit 121 is produced all can be sent to control module 130.Control module 130 comprises time schedule controller 131, a microcontroller 132 and a light source drive 133.Wherein, time schedule controller 131 can produce picture data D11 under the controlling of microcontroller 132.In addition, microcontroller 132 can produce activation bit FDR, to cause light source drive 133 according to activation bit FDR adjustment drive signal DR1～DR3.It should be noted that microcontroller 132 can produce activation bit FDR according to different information under different mode, maintain a white balance mode with the light source that causes lighting unit 110 to be produced.
For instance, Fig. 4 is the configuration diagram according to the projection arrangement and the external control circuit of one embodiment of the invention.As shown in Figure 4, projection arrangement 100 is before dispatching from the factory, and the tester can carry out the correction of the white balance of light source through main frame 410 and color instrument (color meter) 420 earlier.At this moment, microcontroller 132 can switch to a correction mode.Under correction mode, main frame 410 can transmit an external control information FCT and give microcontroller 132.By this, microcontroller 132 will produce activation bit FDR with reference to external control information FCT, and then cause light source drive 133 to produce corresponding driving signal DR1～DR3.Relatively, drive signal DR1～DR3 will order about lighting unit 110 and produce corresponding light source.At this moment, whether the tester can meet white balance mode through the information differentiation light source that color instrument 420 is returned.If light source is not proofreaied and correct to white balance mode, the tester will will resend external control information FCT through main frame 410, till light source meets white balance mode.
It should be noted that every adjustment primary source, signaling conversion circuit 121 promptly can produce one group of corresponding temperature information FTM and monochrome information FB1～FB3.In addition; When light source is adjusted to white balance mode; Temperature information FTM and monochrome information FB1～FB3 that microcontroller 132 also will meet white balance mode are recorded in the setting forms, to set up a preset temperature information FTM ' and a plurality of preset monochrome information PFB1 '～PFB3 ' who sets in the forms.Because the light source that light emitting diode matrix 111 is produced can change along with temperature, so the tester measures the white balance parameter under different temperatures.Relatively, the setting forms that are based upon in the microcontroller 132 will store preset temperature information FTM ' and preset monochrome information FB1 '～FB3 ' under different temperatures.
On the other hand, when projection arrangement 100 practical operations, microcontroller 132 will switch to a feedback mode control.Under feedback mode control, microcontroller 132 is set forms with the temperature information FTM inquiry that contrast signal change-over circuit 121 is returned, from set forms, to capture one group of preset monochrome information FB1 '～FB3 '.In addition, microcontroller 132 can be compared the preset monochrome information FB1 ' that is captured～FB 3 ' and monochrome information FB1～FB3 that signaling conversion circuit 121 is returned.If comparison is unsuccessful, 132 of microcontrollers will change activation bit FDR, come the light source of correct for illumination unit 110 with the adjustment through drive signal DR1～DR3.By this, when monochrome information FB1～FB3 and preset monochrome information FB1 '～FB3 ' compare successfully, the light source that lighting unit 110 is produced will be maintained under the white balance mode.
It should be noted that control module 130 different modes capable of using are adjusted drive signal DR1～DR3 in the correction of the white balance of light source.For instance, light source drive 133 can be under the situation of fixed drive signal DR1, through adjusting remaining drive signal DR2 and DR3, the light source that comes correct for illumination unit 110 to be produced.Under this kind situation, the timing of the white balance before projection arrangement 100 is dispatching from the factory, control module 130 can be with reference to amplitude and the work period of external control information FCT adjustment drive signal DR2 and DR3, to reach the purpose of calibration light source.
Relatively, the white balance parameter under different temperatures, obtained of control module 130 will be shown in Fig. 5 A and Fig. 5 B.Wherein, the temperature of the high more then representation element periphery of the numerical value of temperature information FTM is low more.In addition, under the situation of fixed drive signal DR1, control module 130 must be heightened the numerical value of monochrome information FB2 and FB3 along with the reduction of temperature.On the other hand; Be stored in preset monochrome information FB1 '～FB3 ' of setting in the forms this moment with as shown in table 1; Wherein preset monochrome information FB1 ' can be along with temperature produces change; So with " * " expression, preset monochrome information FB2 ', FB3 ' then are to be extended by Fig. 5 A and Fig. 5 B with the relativeness of preset temperature information FTM '.
| FB1’ | FB2’ | FB3’ | |
| 30℃ | * | 1600 | 2090 |
| 40℃ | * | 1600 | 2050 |
| 50℃ | * | 1550 | 2000 |
| 60℃ | * | 1500 | 1900 |
| 70℃ | * | 1400 | 1800 |
Table 1
In addition; When projection arrangement 100 practical operations; Microcontroller 132 also can be under the situation of fixed drive signal DR1, and reference setting forms as shown in table 1 are adjusted amplitude and the work period of drive signal DR2 and DR3, so that light source is maintained white balance mode.Relatively, this moment will be shown in Fig. 6 A, and in the process of adjustment light source, monochrome information FB1 will remain unchanged, and monochrome information FB2 and FB 3 then will level off to more along with the growth of time and be stored in preset monochrome information FB2 ' and the FB3 ' that sets in the forms.In addition, Fig. 6 B is the electric current sequential chart corresponding to the light emitting diode of Fig. 6 A, and wherein curve 610～630 is respectively in order to the flow through electric current of light emitting diode 141～143 of sign.Shown in Fig. 6 B, in the process of adjustment light source, the electric current of the light emitting diode 141 of flowing through will keep not can, the electric current of flow through light emitting diode 142 and 143 then will tend to a default value along with the growth of time.
On the other hand, light source drive 133 also can be under the situation of fixed drive signal DR2, through adjustment drive signal DR1 and DR3, the light source that comes correct for illumination unit 110 to be produced.Thus, the timing of the white balance before projection arrangement 100 is dispatching from the factory, control module 130 can be with reference to external control information FCT, and amplitude and the work period of adjustment drive signal DR1 and DR3 are to reach the purpose of calibration light source.
Relatively, the white balance parameter that this moment, control module 130 was obtained under different temperatures will be shown in Fig. 7 A and Fig. 7 B.Wherein, the temperature of the high more then representation element periphery of the numerical value of temperature information FTM is low more.In addition, under the situation of fixed drive signal DR2, control module 130 must reduce the numerical value of monochrome information FB1 along with the reduction of temperature and improve the numerical value of monochrome information FB3.On the other hand; Be stored in preset monochrome information FB1 '～FB3 ' of setting in the forms this moment with as shown in table 2; Wherein preset monochrome information FB2 ' can be along with temperature produces change; So with " * " expression, preset monochrome information FB1 ', FB3 ' then are to be extended by Fig. 7 A and Fig. 7 B with the relativeness of preset temperature information FTM '.
| FB1’ | FB2’ | FB3’ | |
| 30 |
1300 | * | 3100 |
| 40℃ | 1340 | * | 3050 |
| 50℃ | 1350 | * | 3000 |
| 60℃ | 1370 | * | 2950 |
| 70℃ | 1400 | * | 2900 |
Table 2
In addition; When projection arrangement 100 practical operations, microcontroller 132 also can be under the situation of fixed drive signal DR2, with reference to setting forms as shown in table 2; Adjust amplitude and the work period of drive signal DR1 and DR3, so that light source is maintained white balance mode.Relatively, this moment will be shown in Fig. 8 A, and in the process of adjustment light source, monochrome information FB2 will remain unchanged, and monochrome information FB1 and FB3 then will level off to more along with the growth of time and be stored in preset monochrome information FB1 ' and the FB3 ' that sets in the forms.In addition, Fig. 8 B is the electric current sequential chart corresponding to the light emitting diode of Fig. 8 A, and wherein curve 710～730 is respectively in order to the flow through electric current of light emitting diode 141～143 of sign.Shown in Fig. 8 B, in the process of adjustment light source, the electric current of the light emitting diode 142 of flowing through will keep not can, the electric current of flow through light emitting diode 141 and 143 then will tend to a default value along with the growth of time.
Moreover light source drive 133 also can be under the situation of fixed drive signal DR3, through adjustment drive signal DR1 and DR2, the light source that comes correct for illumination unit 110 to be produced.This kind adjustment mode is similar with the adjustment mode of said fixing drive signal DR1 or DR2, so do not repeat them here.What deserves to be mentioned is that light source drive 133 also can be under the situation of the general power of priming illumination unit 110, amplitude and the responsibility cycle of adjustment drive signal DR1～DR3.
Under the situation of the general power of priming illumination unit 110; The timing of the white balance before projection arrangement 100 is dispatching from the factory; Control module 130 can be with reference to external control information FCT, and amplitude and the work period of adjustment drive signal DR1～DR3 are to reach the purpose of calibration light source.At this moment, the white balance parameter under different temperatures, obtained of control module 130 will be shown in Fig. 9 A, Fig. 9 B and Fig. 9 C.
With reference to Fig. 9 A, Fig. 9 B and Fig. 9 C, the temperature of the high more then representation element periphery of the numerical value of temperature information FTM is low more.In addition, under the situation of the general power of priming illumination unit 110, control module 130 must reduce the numerical value of monochrome information FB1 along with the reduction of temperature, and improves the numerical value of monochrome information FB2 and FB3.On the other hand, be stored in monochrome information FB1～FB3 of setting in the forms this moment with as shown in table 3, wherein preset monochrome information FB1 '～FB3 ' then is by Fig. 9 A, Fig. 9 B and Fig. 9 C extension with the relativeness of preset temperature information FTM '.
| FB1’ | FB2’ | FB3’ | |
| 30 |
1200 | 1900 | 3090 |
| 40℃ | 1250 | 1900 | 3050 |
| 50℃ | 1300 | 1850 | 3000 |
| 60℃ | 1350 | 1800 | 2900 |
| 70℃ | 1400 | 1800 | 2800 |
Table 3
In addition; When projection arrangement 100 practical operations, microcontroller 132 also can be under the situation of the general power of priming illumination unit 110, with reference to setting forms as shown in table 3; Adjust amplitude and the work period of drive signal DR1～DR3, so that light source is maintained white balance mode.Relatively, this moment will be shown in Figure 10 A, and in the process of adjustment light source, monochrome information FB1～FB3 will level off to more along with the growth of time and be stored in preset monochrome information the FB1 '～FB3 ' that sets in the forms.In addition, Figure 10 B is the electric current sequential chart corresponding to the light emitting diode of Figure 10 A, and wherein curve 1010～1030 is respectively in order to the flow through electric current of light emitting diode 141～143 of sign.Shown in Figure 10 B, in the process of adjustment light source, the electric current of the light emitting diode 141～143 of flowing through then will tend to a default value along with the growth of time.
Though it should be noted that Fig. 1 embodiment signaling conversion circuit 121 and luminance detection circuit 122 are arranged on display unit 120, it is not in order to limit the present invention.Those skilled in the art can be according to design, and signaling conversion circuit 121 or/and luminance detection circuit 122 are arranged on outside the display unit 120.In addition, can understand Fig. 1 embodiment more in order to cause those skilled in the art, Figure 11 is the partial circuit synoptic diagram according to the projection arrangement of one embodiment of the invention.
With reference to Figure 11, current-to-voltage convertor 162 comprise an operational amplifier OP1, a resistance R 1, with a capacitor C 1.Wherein, the negative input end of operational amplifier OP1 electrically connects color sensor 171, and the positive input terminal of operational amplifier 0P1 electrically connects an earth terminal.Resistance R 1 is electrically connected between the negative input end and output terminal of operational amplifier 0P1.Capacitor C 1 is parallel with one another with resistance R 1.By this, operational amplifier OP1 can convert the current sensor SC1 that color sensor 171 is produced to sensing voltage SV1 through capacitor C 1 and resistance R 1 formed feedback mechanism.
In addition, continue with reference to Figure 11, temperature-sensitive sticker 112 comprises a resistance R 2 and a thermistor RS1.Wherein, resistance R 2 is serially connected in supply voltage V with thermistor RS1
CCAnd between the earth terminal.In operation, thermistor RS1 can change its resistance value along with variation of temperature, so pressure drop also will be along with variation of temperature produces corresponding the change at the pressure reduction of thermistor RS1.In other words, temperature-sensitive sticker 112 can produce the temperature sensing signal STM with temperature correlation through the pressure reduction of pressure drop at thermistor RS1.
In sum, the present invention sets up one to set forms before projection arrangement dispatches from the factory, and when the projection arrangement practical operation, control module can come calibration light source with reference to the white balance parameter of setting in the forms by this.In addition, the present invention's different mode capable of using is adjusted drive signal, and capable of using long-time or the integration of short time obtains the monochrome information relevant with light source.By this, can promote the degree of accuracy of light source on proofreading and correct, and then improve the display quality of image.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Has common knowledge the knowledgeable in the technical field under any; Do not breaking away from the spirit and scope of the present invention, when doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (11)
1. projection arrangement comprises:
One lighting unit produces a light source with reference to a plurality of drive signals, and with reference to the temperature of this light source one temperature sensing signal is provided;
One luminance detection circuit detects the brightness of this light source, to produce a plurality of brightness sensing signals;
One signaling conversion circuit with this temperature sensing signal and these a plurality of brightness sensing signals, converts a temperature information and a plurality of monochrome information to; And
One control module; Comprise that one sets forms; And these setting forms are writing down a preset temperature information and a plurality of preset monochrome information, and wherein this control module is adjusted these a plurality of drive signals, so that adjusted this temperature information meets the information in these setting forms with these a plurality of monochrome informations.
2. projection arrangement according to claim 1, wherein on behalf of the different white balance of this lighting unit, this preset temperature information set with these a plurality of preset monochrome informations.
3. projection arrangement according to claim 1, wherein this control module comprises:
One light source drive is according to these a plurality of drive signals of activation bit adjustment, with this light source adjustment to a white balance mode; And
One microcontroller; Under a correction mode, produce this activation bit according to an external control information, and this temperature information and those monochrome informations that will meet this white balance mode are recorded in these setting forms; To set up this preset temperature information and these a plurality of preset monochrome informations; And under a feedback mode control, this microcontroller should be set forms with reference to this temperature information inquiry, and produced this activation bit according to Query Result.
4. projection arrangement according to claim 3; Wherein this light source drive is under the situation of the one of which of fixing these a plurality of drive signals; Adjust the amplitude and the responsibility cycle of remaining these a plurality of drive signal, or adjust the amplitude or the responsibility cycle of remaining these a plurality of drive signal.
5. projection arrangement according to claim 3, wherein this light source drive is under the situation of the general power of fixing this lighting unit, adjusts the amplitude and the responsibility cycle of these a plurality of drive signals, or adjusts the amplitude or the responsibility cycle of these a plurality of drive signals.
6. projection arrangement according to claim 1, wherein this lighting unit comprises:
One light emitting diode matrix provides one first coloured light, one second coloured light and one the 3rd coloured light, with synthetic this light source; And
One temperature-sensitive sticker, the temperature of this first to the 3rd coloured light of sensing is to produce this temperature sensing signal.
7. projection arrangement according to claim 6, wherein this luminance detection circuit comprises:
A plurality of color sensors; Wherein under a first integral pattern, these a plurality of color sensors are switched on simultaneously, detect in proper order with the generation that cooperates this first to the 3rd coloured light; And under a second integral pattern; These a plurality of color sensors are switched on a Preset Time in regular turn, with pin this first to the 3rd coloured light is detected, and these a plurality of color sensors produce a plurality of current sensors according to testing result;
One current-to-voltage convertor should convert a plurality of sensing voltages to by a plurality of current sensors; And
One integrator cooperates this first integral pattern or this second integral pattern that these a plurality of sensing voltages are carried out integration, to produce these a plurality of brightness sensing signals.
8. projection arrangement according to claim 7, wherein this current-to-voltage convertor comprises:
One operational amplifier, its negative input end electrically connects the one of which of those color sensors, and the positive input terminal of this operational amplifier electrically connects an earth terminal, and the output terminal of this operational amplifier is in order to export the one of which of these a plurality of sensing voltages;
One resistance is electrically connected between the negative input end and output terminal of this operational amplifier; And
One electric capacity, parallel with one another with this resistance.
9. projection arrangement according to claim 1, wherein this signaling conversion circuit comprises:
One multiplexer receives this temperature sensing signal and these a plurality of brightness sensing signals, and exports this temperature sensing signal and these a plurality of brightness sensing signals one by one; And
One analog-to-digital converter, the signal that this multiplexer is exported converts numerical information one by one to, to produce this temperature information and these a plurality of monochrome informations.
10. projection arrangement according to claim 1 also comprises:
Time schedule controller is arranged in this control module, and in order to produce a picture data; And
One display unit produces an image with reference to this picture data under the irradiation of this light source.
11. projection arrangement according to claim 10, wherein this luminance detection circuit and this signaling conversion circuit are arranged in this display unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105269444A CN102455576A (en) | 2010-10-25 | 2010-10-25 | Projecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105269444A CN102455576A (en) | 2010-10-25 | 2010-10-25 | Projecting apparatus |
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| CN102455576A true CN102455576A (en) | 2012-05-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105269444A Pending CN102455576A (en) | 2010-10-25 | 2010-10-25 | Projecting apparatus |
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Application publication date: 20120516 |