CN102722076B - Projection device and projection method - Google Patents
Projection device and projection method Download PDFInfo
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- CN102722076B CN102722076B CN201210148809.XA CN201210148809A CN102722076B CN 102722076 B CN102722076 B CN 102722076B CN 201210148809 A CN201210148809 A CN 201210148809A CN 102722076 B CN102722076 B CN 102722076B
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Abstract
The invention provides a projection device includes various semi-conductor light-emitting elements in different wave length; an input part inputting image signals; an optical image forming part forming an optical image corresponding to the image signals input from the input part by using the light source light obtained through the light emitting of the semi-conductor light-emitting elements; an projection part projecting on the object to be projected through the optical image formed by the optical image forming part; a temperature detection part detecting the temperature during the light emitting based on types aiming at the semi-conductor light-emitting elements; a determining part determining the light intensity during the light emitting based on the types aiming at the semi-conductor light-emitting elements; and a light-emitting control part which rectifies the determined results of the determining part through the detection result of the temperature detection part, and controls the lighting intensity of each semi-conductor light-emitting element based on the rectified determined results.
Description
The cross reference of related application
The Japanese patent application of the application based on proposing on March 28th, 2011 advocated the interests of right of priority for No. 2011-070007, and its instructions, claims, summary are all introduced into this instructions at this.
Technical field
The present invention relates to be suitable for the projection arrangements such as projector, projecting method and the program such as DLP (Digital Light Processing: digital light is processed) (registered trademark) mode.
Background technology
In the past, following projector is carried out various designs and is become commercialized, this projector by make from the white light of light source see through side face dispose the color filter of a plurality of colors colour wheel (colorwheel) and as timesharing coloured light penetrate, and use the image that this light is used each color to carry out projection, thereby by an order projection of color images.
Light source component as this projector, consider to replace a large amount of discharge lamps such as high-pressure mercury-vapor lamp that use in the past, and use at semiconductor light-emitting elements such as the LED of the aspect excellences such as power consumption, size, thermal value (light emitting diode) or LD (laser diode).
When the light source that these semiconductor light-emitting elements are used as projector, semiconductor light-emitting elements is substantially luminous with single wavelength, therefore need to be used in combination the semiconductor light-emitting elements of the different a plurality of kinds of emission wavelength.
And, in the situation that use the semiconductor light-emitting elements of the different a plurality of kinds of emission wavelength, need between the semiconductor light-emitting elements of various species, obtain the balance of brightness.For this reason, can consider, as the invention of TOHKEMY 2010-152326 communique record, the colourity of the light source light of look order formula to be maintained exactly to the technology of the content setting.
In the technology of recording at above-mentioned patent documentation, utilize illuminance transducer to measure the lightness of each color, based on its measurement result, regulate the lightness of each color, so that accumulative total colourity becomes target colourity.
But the emission wavelength of semiconductor light sources element changes according to temperature, on the other hand, the sensitivity of illuminance transducer changes according to the optical wavelength of institute's incident.Thereby if as the temperature variation of the semiconductor light-emitting elements of light source, even if it is output as same levels, the detected value of illuminance transducer side also can change.Its result, the balance of the color of the image of institute's projection is destroyed.
Summary of the invention
Projection arrangement of the present invention, possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different;
Input part, received image signal;
Optical image forming portion, utilizes to make that described semiconductor light-emitting elements is luminous and the light source light that obtains forms the corresponding optical image of picture signal with described input part input;
Projection Division, the optical image being formed by described optical image forming portion to projection objects projection;
Temperature detecting part, for described semiconductor light-emitting elements, temperature when luminous by species detection;
Determination part, for described semiconductor light-emitting elements, measures light intensity when luminous by kind; And
Light emitting control portion, utilizes the testing result of described temperature detecting part, the measurement result of described determination part is revised, and based on revised described measurement result, controls the luminous intensity of semiconductor light-emitting elements described in each.
In addition, projecting method of the present invention, it is as the projecting method on lower device, this device possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image forming portion, utilizes to make that described semiconductor light-emitting elements is luminous and the light source light that obtains forms the corresponding optical image of picture signal with described input part input; And Projection Division, the optical image being formed by described optical image forming portion to projection objects projection, above-mentioned projecting method comprises:
Temperature detection operation, for described semiconductor light-emitting elements, temperature when luminous by species detection;
Measure operation, for described semiconductor light-emitting elements, by kind, measure light intensity when luminous; And
Light emitting control operation, utilizes the testing result of described temperature detection operation, the measurement result in described mensuration operation is revised, and based on revised described measurement result, controls the luminous intensity of semiconductor light-emitting elements described in each.
In addition, program of the present invention, it is the program that computing machine as built-in in lower device is carried out, this device possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image forming portion, utilizes to make that described semiconductor light-emitting elements is luminous and the light source light that obtains forms the corresponding optical image of picture signal with described input part input; And Projection Division, the optical image being formed by described optical image forming portion to projection objects projection,
Said procedure makes described computing machine as following mechanism performance function, that is:
Temperature detecting part, for described semiconductor light-emitting elements, temperature when luminous by species detection;
Determination part, for described semiconductor light-emitting elements, measures light intensity when luminous by kind; And
Light emitting control portion, utilizes the testing result of described temperature detecting part, the measurement result of described determination part is revised, and based on revised described measurement result, controls the luminous intensity of semiconductor light-emitting elements described in each.
Advantage of the present invention will be set forth in explanation subsequently, and part advantage of the present invention becomes obviously by explanation, or learns by implementing the present invention.Advantage of the present invention can realize by device and the combination of pointing out in detail in the back.
Accompanying drawing explanation
Appended accompanying drawing, in conjunction with being also contained in a part of the present invention, illustrates embodiments of the present invention, and with together with the explanation of the in a word bright and embodiment given below providing above, for explaining principle of the present invention.
Fig. 1 means the electronic loop of data projection machine and the figure of optical system formation completely of one embodiment of the present invention.
Fig. 2 means the figure of concrete configuration example of the optical system of this embodiment.
The flow process of the contents processing of the color balance correction of the light source of carrying out together with projection action when Fig. 3 means the power connection of this embodiment.
The time diagram of the movement content of each portion when Fig. 4 means the color balance correction of this embodiment.
Fig. 5 means the LD of this embodiment and the luminous output of LED and receives the figure of the relation that is subject to light value of this luminous illuminance transducer.
Fig. 6 means the figure of concept of correction of the color balance of this embodiment.
Fig. 7 is according to the measured value of light illumination and temperature, obtains for determining the skeleton diagram of question blank of the correction factor of modified value.
Fig. 8 is according to the correction factor obtained in Fig. 7, determines the skeleton diagram of question blank of the driving current value of red light source led 26.
Embodiment
With reference to accompanying drawing, embodiments of the invention are described.
Below, with reference to the accompanying drawings of apply the present invention to DLP (registered trademark) mode data projection machine time an embodiment.
Fig. 1 means the figure of summary function composing of the data projection machine 10 of present embodiment.
Input part 11 is such as the formations such as RGB input terminal by pin jack (RCA) type video input terminal, D-sub15 type.Be imported into the analog picture signal of all size of input part 11, after being digitized, via system bus SB, be sent to image conversion portion 12 in input part 11.
Image conversion portion 12, also referred to as scaler (scaler), is unified into inputted view data the view data of the prescribed form that is suitable for projection, is sent to projection process portion 13.
At this moment, and OSD (On Screen Display: the screen display) data such as symbol that represent exercises state of use, also by image conversion portion 12 is overlapping, be worked in view data as required, view data after processing is delivered to projection process portion 13.
Projection process portion 13 is according to the view data of sending, by by the frame rate of form according to the rules for example 60 (frame/seconds) and color component Segmentation Number and show that the timesharing more at a high speed that grey exponent number multiplies each other drives, drive micro-reflector element 14 as spatial optical modulation element to show.
This micro-reflector element 14 is by being arranged in a plurality of for example WXGA (WideeXtended Graphic Array: carrying out on/off moves to show image at a high speed respectively at each angle of inclination of the tiny mirror that widescreen XGA (Extended Graphics Array)) (horizontal 1280 pixels * vertical 800 pixels) are measured, thereby utilizes its reflected light to form optical image of array-like.
On the other hand, from light source portion 15 timesharing and cyclically penetrate the primitive color light of R, G, B.Primitive color light from this light source portion 15 is reflected mirror 16 total reflections and is irradiated to above-mentioned micro-reflector element 14.
And, by the reflected light on micro-reflector element 14, forming optical image, formed optical image is via projecting lens portion 17, and Projection Display is on the not shown screen as projection objects.
Light source portion 15 has the LD18 that sends blue laser.
The blue laser (B) that LD18 sends is reflected mirror 19 reflections, sees through after light splitting mirror wheel (dichroicmirror wheel) 20, is radiated on the side face of fluorescent wheel 21.This fluorescent wheel 21 is by wheel motor (M) 22 rotations, on the side face that irradiates is all-round, forms phosphor layers 21g at the laser of above-mentioned blueness.
In more detail, on the circumference by the illuminated above-mentioned laser at fluorescent wheel 21, apply phosphor body, form phosphor layers 21g.At the back side of the face that is formed with phosphor layers 21g of fluorescent wheel 21, to be provided with reflecting plate with the overlapping mode of phosphor layers 21g.
Blue Ear Mucosa Treated by He Ne Laser Irradiation is to the phosphor layers 21g of fluorescent wheel 21, so green light (G) encourages as reflected light.This green light is reflected by above-mentioned light splitting mirror wheel 20, then by 23 reflections of light splitting mirror wheel, and by integraph 24, become after the light beam of illuminance distribution, be reflected mirror 25 reflections, arrive above-mentioned catoptron 16.
In addition, light source portion 15 has the LED26 of the red light sent and sends the LED27 of blue light.
The red light that LED26 sends (R) sees through above-mentioned light splitting mirror wheel 20, after above-mentioned light splitting mirror wheel 23 reflections, becomes the light beam of illuminance distribution by above-mentioned integraph 24, then, by above-mentioned catoptron 25 reflections, arrives above-mentioned catoptron 16.
The blue light that LED27 sends (B) sees through above-mentioned light splitting mirror wheel 23, by above-mentioned integraph 24, becomes after the light beam of illuminance distribution, by above-mentioned catoptron 25 reflections, arrives above-mentioned catoptron 16.
As mentioned above, light splitting mirror wheel 20 sees through blue light, red light and reflects green.Light splitting mirror wheel 23 sees through blue light and reflects green and red light.
In present embodiment, in the catoptrical assign action based on above-mentioned micro-reflector element 14, light, the what is called " blocking light (offlight) " to the 17 directions reflections of above-mentioned projecting lens portion do not incide the illuminance transducer 28 as determination part.This illuminance transducer 28 is measured the illumination of the light of incident, to 13 outputs of above-mentioned projection process portion, represent signal Ilm, the signal IIlm of measurement result of illumination that represents the light in G field interval of measurement result of illumination of the light in R field intervals and the signal IIIlm of measurement result that represents the illumination of the light in B field interval, detailed content aftermentioned.
In addition, for above-mentioned LD18, avoid its light emission direction and additional be provided with the temperature sensor 29 as temperature detecting part.Similarly, for LED26, avoid its light emission direction and the additional temperature sensor 30 that is provided with.For LED27, avoid its light emission direction and the additional temperature sensor 31 that is provided with.
Projection process portion 13 carries out under the control of CPU34 described later: by above-mentioned micro-reflector element 14, show the formation of the optical image that image carries out, above-mentioned LD18, LED26, 27 each is luminous, the rotation of the fluorescent wheel 21 based on above-mentioned wheel motor 22, make the driving of the motor (M) 32 of light splitting mirror wheel 20 rotations, make the driving of the motor (M) 33 of above-mentioned light splitting mirror wheel 23 rotations, the mensuration of the illumination that above-mentioned illuminance transducer 28 carries out, and the detection of the temperature of each light source of carrying out of said temperature sensor 29～31.
Whole actions of above-mentioned each circuit are controlled by CPU34.This CPU34 is directly connected with primary memory 35 and program storage 36.Primary memory 35 for example consists of SRAM, as the working storage performance function of CPU34.Program storage 36 consists of the nonvolatile memory of can electricity rewriting, the operation program that storage CPU34 carries out and various fixed datas etc.CPU34 is used above-mentioned primary memory 35 and program storage 36, carries out the control action in this data projection machine 10.
Above-mentioned CPU34, according to the key operation signal from operating portion 37, carries out various projection actions.
This operating portion 37 comprises key operation portion in the main body that is arranged on data projection machine 10, accept the infrared ray light accepting part from the infrared light of the not shown remote controllers of these data projection machine 10 special uses, will utilize based on user the key operation signal of the key of main body key operation portion or remote controllers operation directly to output to CPU34.
Above-mentioned CPU34 is also connected with acoustic processing portion 38 via said system bus SB.Acoustic processing portion 38 possesses the sound source circuits such as PCM sound source, and the simulating of voice data being provided when projection is moved drives loudspeaker portion 39 and carry out public address playback, or sends as required too sound etc.
Then, utilize Fig. 2, the concrete configuration example of the optical system that comprises above-mentioned light source portion 15, micro-reflector element 14 and projecting lens portion 17 is described.
In Fig. 2, LD18 for example consists of 24 the LD arrays that are configured to rectangular a plurality of 8 * 4 (paper directions) totally, the blue laser of the luminous ejaculation by is separately reflected mirror 19 reflections, and this catoptron 19 also forms by the catoptron setting table terrace of equal number is configured to rectangular reflection mirror array.
The blue laser that is reflected mirror 19 reflections projects on fluorescent wheel 21 via lens 41,42, light splitting mirror wheel 20, lens 43,44.
The baffle reflection being arranged by the back side of the face that is formed with phosphor layers 21g at fluorescent wheel 21 by the green light of the phosphor layers 21g excitation of fluorescent wheel 21, via said lens 43,44 and by 20 reflections of light splitting mirror wheel, rear by 23 reflections of light splitting mirror wheel via lens 45.
By the green light of these light splitting mirror wheel 23 reflections, via lens 46, integraph 24 and lens 47, be reflected mirror 25 reflections, and then arrive above-mentioned catoptron 16 via lens 48.
The green light that is reflected mirror 16 reflections is irradiated to micro-reflector element 14 via lens 49, is formed the optical image of corresponding color by this micro-reflector element 14.Formed optical image, via said lens 49, penetrates to projecting lens portion 17 sides.
In addition, the red light that LED26 sends is via lens 50,51 and see through above-mentioned light splitting mirror wheel 20, via lens 45, by above-mentioned light splitting mirror wheel 23, is reflected.
The blue light that LED27 sends is via lens 52,53 and see through above-mentioned light splitting mirror wheel 23.
Then, the action of above-mentioned embodiment is described.
In addition, as mentioned above, below shown in action all after the operation program of being read from program storage 36 by CPU34 and fixed data etc. being launched primary memory 35 and stored, carry out.
In addition, for the purpose of simplifying the description, while supposing projection 1 color image frame, for example, this frame is formed to the also image of this color of projection by R (red), G (green), these 4 fields of W (in vain), B (indigo plant).In W (in vain), after making LED27 that LD18 that green light uses, LED26 that red light is used and blue light use all simultaneously luminous, micro-reflector element 14 shows and the corresponding image of brightness signal Y (Y=0.299R+0.587G+0.114B).
Fig. 3 is the process flow diagram of extracting the contents processing of the color balance correction that relates generally to light source of carrying out during the power connection that represents data projection machine 10 out.
Under the state switching on power, CPU34 carry out by micro-reflector element 14 forms with the corresponding optical image of picture signal of being inputted by input part 11, use light from light source portion 15 by the processing of the common projection action of projecting lens portion 17 projections after (step S101), judge that whether next frame timing is for carrying out the frame timing (step S102) of correction of the color balance of light source.
Suppose to be regularly for example set as one hour once for carrying out the frame of the color balance correction of this light source, if frame rate was 60 (frame/seconds), with the frequency execution of 210,000 6 thousand frame 1 time.
In the situation that be judged as next frame, not regularly that CPU34 judges these situations at step S102, then returns to the processing starting from above-mentioned steps S101 for carrying out the frame timing of the color balance correction of light source.
Like this, by repeatedly performing step the processing of S101, S102, on one side CPU34 carries out the processing that relates to common projection action, Yi Bian wait becomes for carrying out the frame timing of the color balance correction of light source.
Then, if next frame regularly becomes for carrying out the frame timing of the color balance correction of light source, CPU34 judges these situations in above-mentioned steps S102, in the R field that is arranged in the beginning of 1 follow-up frame, make micro-reflector element 14 show that in this field interval, whole face is carried out projection (step S103) for black image always.
Fig. 4 represents that action for carrying out 1 interframe during the image projection of light source colour balance correction regularly.As shown in this figure (A), this 1 frame consists of 4 fields R field, G field, W field and B field totally.In order easily to describe, the depth map of each field interval is shown equal.
As shown in Fig. 4 (B), the LED26 that emitting red light is used is driven by projection process portion 13, with luminous during each of R field and W field.
As shown in Fig. 4 (C), the LD18 that sends blue light in order to obtain green light is driven by projection process portion 13, with luminous during each of G field and W field.
As shown in Fig. 4 (D), the LED27 that blue-light-emitting is used is driven by projection process portion 13, luminous with two the continuous field intervals in W field and B field.
In addition, in R field, as shown in Fig. 4 (E), the fan-shaped side face position of the illuminated red light from above-mentioned LED26 of light splitting mirror wheel 20 is transparent component or the otch of transparent glass or acrylic resin etc., and almost the efficiency with 100 (%) sees through the red light from LED26 without loss.
On the other hand, as shown in Fig. 4 (F), side face position in the illuminated red light from above-mentioned LED26 of light splitting mirror wheel 23 is formed with catoptron, and the red light from LED26 that almost sees through without loss light splitting mirror wheel 20 with the efficiency of 100 (%) is carried out to total reflection.
In above-mentioned steps S103, show that whole is the result of black image, in micro-reflector element 14, the reflected light of whole is as blocking light, projects and disposes the not shown light absorption part that the non-projection of illuminance transducer 28 is used, rather than project projecting lens portion 17.In this light absorption part, be coated with for not making blocking light reflection its absorption and be transformed to the heat-resisting paint of hot black.
CPU34 is being positioned at the timing of the substantial middle of this R field interval, make projection process portion 13 utilize above-mentioned illuminance transducer 28 to measure illumination Ilm, and make projection process portion 13 utilize temperature sensor 30 to detect at the temperature T hR of luminous LED26 of this moment (step S104).
The temperature T hR of the LED26 that by temperature sensor 30 detected of CPU34 based on obtaining by projection process portion 13, the illumination Ilm being measured by illuminance transducer 28 obtaining by projection process portion 13 is equally revised, obtain thus the correct illumination of LED26, and based on resulting illumination and the current value that constantly driving at this, calculate the output regulated value of LED26, specifically calculate driving current value (step S105).
Fig. 5 means the luminous output of LD and LED and receives the figure of the relation that is subject to light value of its luminous illuminance transducer.In this figure, with respect to the temperature T h of the LD representing with solid line and LED, same characteristic during temperature higher (Th+) represents with dot-and-dash line, and same characteristic during temperature lower (Th-) dots.Conventionally, for semiconductor light-emitting elements, temperature is higher more to the direction displacement (shift) of emission wavelength long (frequency is low), even and the luminous output of the light source irradiating identical, the sensitivity of the longer illuminance transducer of its wavelength is higher, produces the higher measurement result of illumination.
; the temperature of semiconductor light-emitting elements is higher, more to the long direction displacement of emission wavelength, the expression LD in Fig. 5 and the luminous output of LED and receive its luminous illuminance transducer the relation that is subject to light value straight line degree of tilt, be that the differential coefficient of above-mentioned straight line is larger.
Consider this character, the testing result ThR of CPU34 based on temperature sensor 30, the measurement result of correction illuminance transducer 28, can understand the correct luminous output of LED26 thus, can calculate the correct driving current value as its regulated value.
For example utilize the measurement result of illuminance transducer 28 and the measurement result of temperature sensor 30, generate in advance the arithmetic expression (numerical expression 1) of the modified value of the illumination that obtains semiconductor light-emitting elements, this arithmetic expression is stored in program storage.
Y '=f (Y, ThR) (numerical expression 1)
(Y ': the revised brightness value of semiconductor light-emitting elements, Y: the measurement result of illuminance transducer 28, ThR: the testing result of temperature sensor 30)
And the testing result ThR of the temperature sensor 30 of CPU34 based on actual, reads the above-mentioned amendment type of storage, and the measurement result of illuminance transducer 28 is revised.
And then, program storage stores following arithmetic expression, this arithmetic expression is for according to the revised value of the illumination of calculated semiconductor light-emitting elements and the driving current value of semiconductor light-emitting elements, calculates in order to make semiconductor light-emitting elements and the driving current value that need luminous with revised brightness value.
I '=f (Y ', i) (numerical expression 2)
(i: be applied to driving current value, i ' on semiconductor light-emitting elements: in order to make semiconductor light-emitting elements and the driving current value that need luminous with revised brightness value)
And the testing result ThR of the temperature sensor 30 of CPU34 based on actual, measures measuring the driving current value of semiconductor light-emitting elements regularly, reads the above-mentioned numerical expression 2 of storage, and driving current value is revised.
In addition, can be also for example, utilize the measurement result of illuminance transducer 28, the measurement result of temperature sensor 30 and be applied to the driving current value on semiconductor light-emitting elements, generate and obtain the arithmetic expression (numerical expression 3) for the coefficient A of illumination correction in advance, this arithmetic expression is stored in program storage.
A=f (Y, ThR, i) (numerical expression 3)
(A: for the coefficient of illumination correction)
And CPU34 stores following arithmetic expression, this arithmetic expression is for according to the coefficient A that obtained by above-mentioned numerical expression 3 and the driving current value of semiconductor light-emitting elements, calculates in order to make semiconductor light-emitting elements and the driving current value that need luminous with revised brightness value.
I '=f (A, i) (numerical expression 4)
And CPU34, when revising, reads the above-mentioned numerical expression 4 of storage, and driving current value is revised.
Afterwards, CPU34 in the G field of above-mentioned R field, also makes micro-reflector element 14 show that in this field interval, whole face, always for black image, is carried out projection (step S106) follow-up.
In this G field, as shown in Fig. 4 (E), the side face position via the illuminated blue light from above-mentioned LD18 of catoptron 19 of light splitting mirror wheel 20 sees through redness (R) light and blueness (B) light and the spectroscope formation of reflection green (G) light by GRM, see through the blue light from LD18, its phosphor layers 21g to fluorescent wheel 21 is irradiated, and reflection is by the green light of this phosphor layers 21g excitation, and it is penetrated to light splitting mirror wheel 23 directions.
On the other hand, as shown in Fig. 4 (F), on the side face position of the illuminated above-mentioned green light of light splitting mirror wheel 23, be formed with catoptron, the green light almost being reflected without loss with the efficiency of 100 (%) by light splitting mirror wheel 20 is carried out to total reflection.
In above-mentioned steps S106, show that whole for the result of black image, in micro-reflector element 14, the reflected light of whole is as blocking light, project and dispose the not shown light absorption part that the non-projection of illuminance transducer 28 is used, rather than project projecting lens portion 17.In this light absorption part coating for not making blocking light reflection by its absorption and be transformed to the heat-resisting paint of hot black.
CPU34 is being positioned at the timing of the substantial middle of this G field interval, make projection process portion 13 utilize above-mentioned illuminance transducer 28 to measure illumination IIlm, still make projection process portion 13 utilize temperature sensor 29 to detect at the temperature T hG of luminous LD18 of this moment (step S107) simultaneously.
The temperature T hG of the LD18 that by temperature sensor 29 detected of CPU34 based on obtaining via projection process portion 13, the illumination IIlm based on illuminance transducer 28 obtaining via projection process portion 13 is equally revised, obtain thus the correct illumination of LD18, and the illumination based on obtaining and the current value that constantly driving at this, calculate the output regulated value of LD18, specifically calculate driving current value (step S108).
Afterwards, CPU34 in the W field of above-mentioned G field, makes LD18, LED26 and LED27 luminous follow-up, carries out the common projection (step S109) that makes micro-reflector element 14 display brightness images.
In this W field, as shown in Fig. 4 (E), the side face position via the illuminated blue light from above-mentioned LD18 of catoptron 19 of light splitting mirror wheel 20, equally with G field before it see through red (R) light and blueness (B) light and the spectroscope of reflection green (G) light forms by GRM.
Therefore, see through from the blue light of LD18 and make its phosphor layers 21g that is irradiated to fluorescent wheel 21, reflection also makes it to light splitting mirror wheel 23 directions, penetrate by the green light of this phosphor layers 21g excitation.
In addition, meanwhile, from the red light of above-mentioned LED26, see through light splitting mirror wheel 20 and arrive above-mentioned light splitting mirror wheel 23.
On the other hand, as shown in Fig. 4 (F), the illuminated above-mentioned red light of light splitting mirror wheel 23 and the side face position of green light are that reflection Red (R) light and green (G) light and the spectroscope that sees through blue (B) light form by BTM, reflection, from the red light of LED26 and from the green light of phosphor layers 21g, sees through the blue light from LED27 simultaneously.
Therefore, the white light that red light, green light and blue light mixing are formed is irradiated to micro-reflector element 14, forms the optical image of brightness according to the luminance picture being shown by micro-reflector element 14, by projecting lens portion 17, to projection objects, is radiated.
Afterwards, CPU34 in the B field of above-mentioned W field, makes micro-reflector element 14 show that in this field interval, whole face, always for black image, is carried out projection (step S110) follow-up again.
In this B field, only have LED27 driven and luminous, as shown in Fig. 4 (F), the side face position of the illuminated above-mentioned blue light of light splitting mirror wheel 23 is transparent component or the otch such as transparent glass or acrylic resin, and almost the efficiency with 100 (%) sees through the blue light from LED27 without loss.
In above-mentioned steps S110, show that whole for the result of black image, in micro-reflector element 14, the reflected light of whole is as blocking light, project and dispose the not shown light absorption part that the non-projection of illuminance transducer 28 is used, rather than project projecting lens portion 17.In this light absorption part coating for not making blocking light reflection by its absorption and be transformed to the heat-resisting paint of hot black.
CPU34 is being positioned at the timing of the substantial middle of this B field interval, make projection process portion 13 utilize above-mentioned illuminance transducer 28 to measure illumination IIIlm, still make projection process portion 13 utilize temperature sensor 31 to detect at the temperature T hB of luminous LED27 of this moment (step S111) simultaneously.
The temperature T hB of the LED27 that by temperature sensor 31 detected of CPU34 based on obtaining via projection process portion 13, the illumination IIIlm being detected by illuminance transducer 28 obtaining via projection process portion 13 is equally revised, obtain thus the correct illumination of LED27, and the illumination based on obtaining and the current value that constantly driving at this, calculate the output regulated value of LED27, specifically calculate driving current value (step S112).
Above, based on calculating three-color light source new driving current value separately, CPU34 sets in projection process portion 13 LED26 that red light use, for encouraging each driving current value (step S113) of the LD18 that sends blue light of green light and the LED27 that blue light is used, complete thus a series of processing relevant with the color balance correction of light source, and return to the processing that above-mentioned steps S101 rises, to prepare the processing of next color balance correction.
Fig. 6 means the figure of concept of the correction of the color balance that the processing based on above-mentioned Fig. 3 is carried out.
Fig. 6 (A) is illustrated in the output that obtains correct each color when white in the situation of simultaneously sending R, G, B tri-coloured light.As shown in Fig. 6 (A), each output of R, G, B is balanced, and therefore as a result of can access the white as their colour mixture, can carry out the image projection under correct color balance.
Then R, G, the B measurement result of all kinds that, Fig. 6 (B) illustration is measured by illuminance transducer 28.Therefore as shown in the figure, in this Fig. 6 (B), each measurement result of R, G, B is also balanced on the surface, seems as a result of, as their white of colour mixture, also as set, obtains correct color temperature.
Yet Fig. 6 (C) represents that the temperature based on detecting in each light source is implemented to revise to the measurement result in above-mentioned Fig. 6 (B) and the result that obtains is the size of correct illumination.The temperature of the semiconductor light-emitting elements based on such each light source of formation is revised, and the balance of correct illumination revised, of all kinds is carried out in the variation that can access thus the sensitivity of wavelength-shift to being caused by temperature and consequential illuminance transducer 28.
Therefore, according to above-mentioned revised result, calculate and set for regulating the driving current value of each light source, thus as shown in Fig. 6 (D), can make light source luminescent of all kinds with the luminous intensity that is not from surface but has in fact correctly obtained color balance.
According to present embodiment as above, even if form LD18, the LED26 of light source, the temperature of the semiconductor light-emitting elements such as 27 changes, also can not destroy color balance and maintain correct tone.
In addition, in the above-described embodiment, by illuminance transducer 28 being configured in to the irradiation position of above-mentioned blocking light, can affecting by micro-reflector element 14 and form and detected for the optical image of projection by projecting lens portion 17 illumination of the light source irradiating to micro-reflector element 14.
And then, in the above-described embodiment, in the relevant a series of processing of the color balance correction with light source, make micro-reflector element 14 be presented at R, G, in each colour field of B, whole is black image, thereby owing to being only 1 color framing, so human eye visually can recognize hardly, even if but be interrupted for fear of small but projected image, be made as in being arranged at frame W field midway and do not measure, detect etc., and by micro-reflector element 14 display brightness images and by 17 projections of projecting lens portion, so can remove the small interruption of projected image, continue not have the projection action of sense of discomfort.
In this, the field of carrying out common image projection at frame is midway not limited to W field, also can carry out at the brighter Y of image (Huang), make the semiconductor light-emitting elements that sends the semiconductor light-emitting elements of redness (R) light and send green (G) light simultaneously luminous.
In addition, in above-mentioned embodiment, the temperature detection of illumination photometry and light source component of all kinds is carried out in timing at R, G, B Ge Chang center, so can carry out the mensuration of the average illumination of each colour field, the detection of average light-source temperature, can carry out more accurate correction.
In addition, the light splitting mirror wheel of the data projection machine 10 use rotations of present embodiment is directed to integraph 24 by each light, but can certainly realize with fixing non-rotary spectroscope.
In addition, in the above-described embodiment, by LED26, produce red light, utilization produces green light from the irradiation fluorescent wheel 21 of LD18, by LED27, produce blue light, but be not limited to this, for example, also can use LED or LD to produce the light of all colors, for example, also the light irradiating to fluorescent wheel 21 can be used in and produce green and blue light.
In addition, different from the embodiment described above, also can will be stored in program storage for revising the question blank of light illumination in advance.For example, use question blank as shown in Figure 7,8.Fig. 7 is the skeleton diagram of obtaining the question blank of the correction factor using when deciding modified value according to the measured value of light illumination and temperature, and Fig. 8 is the skeleton diagram that the correction factor obtained according to Fig. 7 determines the question blank (R revises after-current ir ' table) of the driving current value of red light source led 26.In addition, Fig. 7,8 question blank are recorded simply in order to illustrate.
Specifically, first, the temperature of measuring as the LED26 of red light source with temperature sensor 30, measures this with illuminance transducer 28 and measures illumination constantly.And the R modified value Ar table with reference in the question blank of Fig. 7, is used resulting temperature and illumination, decides red correction factor Ar.Similarly, with temperature sensor 29, measure the temperature of LD18, with illuminance transducer 28, measure this and measure illumination constantly.And with reference to the G modified value Ag table in the question blank of Fig. 7, use resulting temperature and illumination, decide green correction factor Ag.Similarly, with temperature sensor 31, measure the temperature of LED27, with illuminance transducer 28, measure this and measure illumination constantly.And the B modified value Ab table with reference in the question blank of Fig. 7, is used resulting temperature and illumination, decides blue correction factor Ab.
And the question blank of the revised driving current value of the light source led 26 of recording in reference decision Fig. 8, determines driving current value.Specifically, calculating red correction factor Ar that the question blank by Fig. 7 obtains and the difference of green correction factor Ag is Ar-Ag, and calculates the difference Ar-Ab of red correction factor Ar and blue correction factor Ab.And, the Ar-Ag based on obtaining and the value of Ar-Ab, the driving current value ir ' of setting LED26.In addition, for LD18, LED27, also store same question blank, also driving current value ig ', ib ' are set.With this question blank, revise the driving current value of light source, even if form thus LD18, the LED26 of light source, the temperature of the semiconductor light-emitting elements such as 27 changes, also can not destroy color balance and maintain correct tone.
Those skilled in the art can expect other improvement and beneficial effect, and therefore, the present invention is not limited to above-mentioned specific descriptions and the representational embodiment of instructions.Corresponding various improvement still belongs in the scope by claim and the definite inventive concept of equivalent thereof.
Claims (6)
1. a projection arrangement, is characterized in that, possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different;
Input part, received image signal;
Optical image forming portion, makes that described semiconductor light-emitting elements is luminous and the light source light that obtains forms the corresponding optical image of picture signal with described input part input;
Projection Division, carries out projection by the optical image being formed by described optical image forming portion to projection objects;
Temperature detecting part, for described semiconductor light-emitting elements, temperature when luminous by species detection;
Determination part, for described semiconductor light-emitting elements, measures light intensity when luminous by kind; And
Light emitting control portion, is used the testing result of described temperature detecting part, the measurement result of described determination part is revised, and based on revised described measurement result, controls the luminous intensity of semiconductor light-emitting elements described in each,
The setting of described optical image forming portion make described semiconductor light-emitting elements with single kind luminous during and make a plurality of kinds simultaneously luminous during, when being measured by described determination part, described luminous with single kind during, form respectively whole for black optical image, make a plurality of kinds simultaneously luminous during, form the corresponding optical image of picture signal with described input part input.
2. projection arrangement as claimed in claim 1, is characterized in that,
Described determination part is used in described optical image forming portion not to the reflected light of the direction reflection of described Projection Division, measures described light intensity.
3. projection arrangement as claimed in claim 1, is characterized in that,
Described temperature detecting part and described determination part be for described semiconductor light-emitting elements, by kind, in the timing at each light emission period Jian center, carries out temperature detection when luminous and the mensuration of light intensity.
4. projection arrangement as claimed any one in claims 1 to 3, is characterized in that,
The testing result of described light emitting control portion based on described temperature detecting part, carry out pre-prepd arithmetic expression, and according to the operation result of described arithmetic expression, after the measurement result of described determination part is revised, control the luminous intensity of semiconductor light-emitting elements described in each.
5. projection arrangement as claimed any one in claims 1 to 3, is characterized in that,
The testing result of described light emitting control portion based on described temperature detecting part, after the measurement result of described determination part being revised with reference to cut-and-dried question blank, controls the luminous intensity of semiconductor light-emitting elements described in each.
6. a projecting method, it is the projecting method in following apparatus, this device possesses: the multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image forming portion, makes that described semiconductor light-emitting elements is luminous and the light source light that obtains forms the corresponding optical image of picture signal with described input part input; And Projection Division, the optical image being formed by described optical image forming portion is carried out to projection to projection objects, described projecting method is characterised in that, comprising:
Temperature detection operation, for described semiconductor light-emitting elements, temperature when luminous by species detection;
Measure operation, for described semiconductor light-emitting elements, by kind, measure light intensity when luminous; And
Light emitting control operation, is used the testing result in described temperature detection operation, the measurement result in described mensuration operation is revised, and based on revised described measurement result, controls the luminous intensity of semiconductor light-emitting elements described in each,
The setting of described optical image forming portion make described semiconductor light-emitting elements with single kind luminous during and make a plurality of kinds simultaneously luminous during, when being measured by described determination part, described luminous with single kind during, form respectively whole for black optical image, make a plurality of kinds simultaneously luminous during, form the corresponding optical image of picture signal with described input part input.
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| CN105093787B (en) * | 2014-05-15 | 2017-02-22 | 光宝电子(广州)有限公司 | Light source driving method and apparatus used for image projection. |
| CN107113393A (en) * | 2014-12-24 | 2017-08-29 | 富士胶片株式会社 | Projection type image display apparatus and its light source control method |
| JP6623779B2 (en) * | 2016-01-15 | 2019-12-25 | セイコーエプソン株式会社 | Projector and light source control method |
| CN108287448A (en) | 2017-01-10 | 2018-07-17 | 中强光电股份有限公司 | Projection arrangement and its light source driving method |
| TWI720144B (en) * | 2017-03-02 | 2021-03-01 | 揚明光學股份有限公司 | Light source apparatus |
| CN107315311B (en) * | 2017-08-11 | 2019-09-20 | 青岛海信电器股份有限公司 | Light source module group and laser projection |
| TWI758094B (en) * | 2021-02-09 | 2022-03-11 | 台達電子工業股份有限公司 | Light source module and projection device |
| CN114911120B (en) * | 2021-02-09 | 2024-04-05 | 台达电子工业股份有限公司 | Light source module and projection device |
| CN115390348A (en) | 2021-05-25 | 2022-11-25 | 台达电子工业股份有限公司 | Laser light source depolarizer and projector equipment with laser light source depolarizer |
| TWI815319B (en) * | 2022-02-24 | 2023-09-11 | 台達電子工業股份有限公司 | Laser lighting system |
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| US7524067B2 (en) * | 2004-11-11 | 2009-04-28 | Casio Computer Co., Ltd. | Projector device, projecting method and recording medium in which projection control program is recorded |
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