CN102722076A - Projection device and projection method - Google Patents
Projection device and projection method Download PDFInfo
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- CN102722076A CN102722076A CN201210148809XA CN201210148809A CN102722076A CN 102722076 A CN102722076 A CN 102722076A CN 201210148809X A CN201210148809X A CN 201210148809XA CN 201210148809 A CN201210148809 A CN 201210148809A CN 102722076 A CN102722076 A CN 102722076A
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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 application is based on the interests of 2011-070007 number opinion of the Japanese patent application right of priority that proposed on March 28th, 2011, and its instructions, claims, summary all are introduced into this instructions at this.
Technical field
The present invention relates to be suitable for for example projection arrangements such as projector, projecting method and the program of DLP (Digital Light Processing: digital light is handled) (registered trademark) mode.
Background technology
In the past; Following projector is carried out various designs and is become commercialized; This projector through 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 the image that uses this light that each color is used carries out projection, thereby by a preface projection of color images.
As the light source component of this projector, consider to replace a large amount of in the past discharge lamps such as high-pressure mercury-vapor lamp that use, and use LED (light emitting diode) or the LD semiconductor light-emitting elements such as (laser diodes) excellent at aspects such as power consumption, size, thermal values.
When the light source that these semiconductor light-emitting elements are used as projector, semiconductor light-emitting elements is luminous with single wavelength basically, therefore needs combination to use the semiconductor light-emitting elements of the different a plurality of kinds of emission wavelength.
And, under the situation of the semiconductor light-emitting elements that uses the different a plurality of kinds of emission wavelength, need between the semiconductor light-emitting elements of each kind, obtain the balance of brightness., can consider as the invention of TOHKEMY 2010-152326 communique record for this reason, the colourity of the light source light of look preface formula maintained exactly the technology of the content that sets.
In the technology of above-mentioned patent documentation record, utilize illuminance transducer to measure the lightness of each color, measure the result based on it and 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, and 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 then 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 formation portion utilizes to make said semiconductor light-emitting elements luminous and the light source light that obtains forms the corresponding optical image of picture signal with said input part input;
The Projection Division, the optical image that by the said optical image portion of formation to the projection objects projection;
Temperature detecting part is to said semiconductor light-emitting elements, by the temperature of species detection when luminous;
Determination part to said semiconductor light-emitting elements, is measured the light intensity when luminous by kind; And
Light emitting control portion utilizes the testing result of said temperature detecting part, the mensuration result of said determination part is revised, and based on revised said mensuration result, control the luminous intensity of each said semiconductor light-emitting elements.
In addition, projecting method of the present invention, it is like the projecting method on the lower device, this device possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image formation portion utilizes to make said semiconductor light-emitting elements luminous and the light source light that obtains forms the corresponding optical image of picture signal with said input part input; And the Projection Division, to the optical image that the projection objects projection by the said optical image portion of formation, above-mentioned projecting method comprises:
The temperature detection operation is to said semiconductor light-emitting elements, by the temperature of species detection when luminous;
Measure operation,, measure the light intensity when luminous by kind to said semiconductor light-emitting elements; And
The light emitting control operation is utilized the testing result of said temperature detection operation, the mensuration result in the said mensuration operation is revised, and based on revised said mensuration result, control the luminous intensity of each said semiconductor light-emitting elements.
In addition, program of the present invention, its be as lower device the program carried out of built-in computing machine, this device possesses:
The multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image formation portion utilizes to make said semiconductor light-emitting elements luminous and the light source light that obtains forms the corresponding optical image of picture signal with said input part input; And the Projection Division, the optical image that by the said optical image portion of formation to the projection objects projection,
Said procedure makes said computing machine as following mechanism performance function, that is:
Temperature detecting part is to said semiconductor light-emitting elements, by the temperature of species detection when luminous;
Determination part to said semiconductor light-emitting elements, is measured the light intensity when luminous by kind; And
Light emitting control portion utilizes the testing result of said temperature detecting part, the mensuration result of said determination part is revised, and based on revised said mensuration result, control the luminous intensity of each said semiconductor light-emitting elements.
Advantage of the present invention will be set forth in explanation subsequently, and part advantage of the present invention becomes obviously through explanation, or learn through embodiment of the present invention.Advantage of the present invention can realize through device and the combination of pointing out in detail in the back.
Description of drawings
Appended accompanying drawing combines also to be contained in a part of the present invention, and embodiment of the present invention is described, and with the explanation of the top in a word bright and embodiment given below that provides, is used to explain principle of the present invention.
Fig. 1 is electronic loop and the figure of optical system formation completely of the data projection machine of an expression embodiment of the present invention.
Fig. 2 is the routine figure of concrete formation of the optical system of this embodiment of expression.
The flow process of the contents processing of the color balance correction of the light source of carrying out with projection action when Fig. 3 is the power connection of this embodiment of expression.
The time diagram of movement content of each one when Fig. 4 is the color balance correction of this embodiment of expression.
Fig. 5 be this embodiment of expression LD and LED luminous output and receive the figure of the relation that receives light value of this luminous illuminance transducer.
Fig. 6 is the figure of notion of correction of the color balance of this embodiment of expression.
Fig. 7 is according to the measured value of light illumination and temperature, obtains the skeleton diagram of the question blank of the correction factor that is used to determine modified value.
Fig. 8 is according to the correction factor of in Fig. 7, obtaining, the skeleton diagram of the question blank of the driving current value of the light source led 26 that decision is red.
Embodiment
With reference to accompanying drawing embodiments of the invention are described.
Below, the embodiment when applying the present invention to the data projection machine of DLP (registered trademark) mode with reference to description of drawings.
Fig. 1 is the figure that the summary function of the data projection machine 10 of this embodiment of expression constitutes.
Input part 11 is for example by the formations such as RGB input terminal of 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 in input part 11, being digitized, be sent to image transformation portion 12 via system bus SB.
At this moment, and OSD (On Screen Display: the data such as symbol of representing the exercises state of usefulness screen display), also as required by image transformation portion 12 overlapping being worked in the view data, will processing the back view data and deliver to projection process portion 13.
Projection process portion 13 is according to the view data of sending; The frame rate of the form through will be according to the rules is the cutting apart number, and show the timesharing driving of the more high speed that grey exponent number multiplies each other of 60 (frames/second) and color component for example, drives micro-reflector element 14 as spatial optical modulation element to show.
(WideeXtended Graphic Array: the widescreen XGA) carry out on/off moves display image to a plurality of for example WXGA of this micro-reflector element 14 through will being arranged in array-like at a high speed respectively at each angle of inclination of the tiny mirror of (horizontal 1280 pixels * vertical 800 pixels) amount, thereby utilizes its reflected light to form optical image.
On the other hand, from light source portion 15 timesharing and penetrate the primitive color light of R, G, B circularly.From be reflected mirror 16 total reflections and shine above-mentioned micro-reflector element 14 of the primitive color light of this light source portion 15.
And, forming optical image through the reflected light on the micro-reflector element 14, 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 laser of the blueness that LD18 sends (B) mirror 19 reflection that is reflected, see through beam split mirror wheel (dichroicmirror wheel) 20 after, be radiated on the side face of fluorescent wheel 21.This fluorescent wheel 21 is by wheel motor (M) 22 rotations, forms phosphor layers 21g on full week at the side face that laser shone of above-mentioned blueness.
In more detail, through on the circumference of the illuminated above-mentioned laser of fluorescent wheel 21, applying 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 laser radiation is to the phosphor layers 21g of fluorescent wheel 21, so green light (G) encourages as reflected light.This green light is by 20 reflections of above-mentioned beam split mirror wheel, become the light beam of illuminance distribution again by 23 reflections of beam split mirror wheel, and through integraph 24 after, mirror 25 reflections that are reflected 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 beam split mirror wheel 20, after above-mentioned beam split mirror wheel 23 reflections, becomes the light beam of illuminance distribution through 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 beam split mirror wheel 23, become the light beam of illuminance distribution through above-mentioned integraph 24 after, by above-mentioned catoptron 25 reflections, arrive above-mentioned catoptron 16.
As stated, beam split mirror wheel 20 sees through blue light, red light and reflects green.Beam split mirror wheel 23 sees through blue light and reflects green and red light.
In this 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 reflection 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; The mensuration result's of the mensuration result's of the illumination of the mensuration result's of the illumination of the light in above-mentioned projection process portion 13 output expression R field intervals signal Ilm, the light in the expression G field interval the signal IIlm and the illumination of the light in the expression B field interval signal IIIlm states after the detailed content.
In addition, for above-mentioned LD18, avoid its light emission direction and additional be provided with temperature sensor 29 as temperature detecting part.Likewise, 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 after carry out under the control of the CPU34 that states: the formation of the optical image that carries out through above-mentioned micro-reflector element 14 display images; Above-mentioned LD18; LED26; Each of 27 is luminous; Fluorescent based on above-mentioned wheel motor 22 is taken turns 21 rotation; Make the driving of the motor (M) 32 of beam split mirror wheel 20 rotations; Make the driving of the motor (M) 33 of above-mentioned beam split 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 directly is connected with primary memory 35 and program storage 36.Primary memory 35 for example is made up of SRAM, as the working storage performance function of CPU34.Program storage 36 is by can constituting by the electric nonvolatile memory of rewriting operation program that storage CPU34 carries out and various fixed datas etc.CPU34 uses above-mentioned primary memory 35 and program storage 36, carries out the control action in this data projection machine 10.
Above-mentioned CPU34 carries out various projection actions according to the key operation signal from operating portion 37.
This operating portion 37 comprises key operation portion on the main body that is arranged on data projection machine 10, accept the infrared ray light accepting part from the infrared light of the special-purpose not shown remote controllers of this data projection machine 10, will utilize the key operation signal of the key of main body key operation portion or remote controllers operation directly to output to CPU34 based on the user.
Above-mentioned CPU34 also is connected with acoustic processing portion 38 via said system bus SB.Acoustic processing portion 38 possesses sound source circuits such as PCM sound source, and the simulating of voice data that is provided when projection is moved drives speaker portion 39 and carry out the public address playback, or sends too sound etc. as required.
Then, utilize Fig. 2, the concrete formation example of the optical system that comprises above-mentioned light source portion 15, micro-reflector element 14 and projecting lens portion 17 is described.
Among Fig. 2; LD18 for example is made up of 24 the LD arrays that are configured to rectangular a plurality of 8 * 4 (paper directions) totally; Mirror 19 reflections that are reflected of the blue laser of the luminous ejaculation through separately, this catoptron 19 also step is set is configured to rectangular reflection mirror array by the catoptron with equal number and constitutes.
The laser of the blueness that the mirror 19 that is reflected reflects projects on the fluorescent wheel 21 via lens 41,42, beam split mirror wheel 20, lens 43,44.
The baffle reflection that is provided with by the back side by the green light of the phosphor layers 21g excitation of fluorescent wheel 21 at the face that is formed with phosphor layers 21g of fluorescent wheel 21; Via said lens 43,44 and by 20 reflections of beam split mirror wheel, reflected by beam split mirror wheel 23 via lens 45 backs.
Via lens 46, integraph 24 and lens 47, the mirror 25 that is reflected reflects, and then arrives above-mentioned catoptron 16 via lens 48 by the green light of these beam split mirror wheel 23 reflections.
The green light that the mirror 16 that is reflected reflects shines micro-reflector element 14 via lens 49, is formed the optical image of corresponding color by this micro-reflector element 14.Formed optical image penetrates to projecting lens portion 17 sides via said lens 49.
In addition, the red light that LED26 sends is via lens 50,51 and see through above-mentioned beam split mirror wheel 20, is reflected by above-mentioned beam split mirror wheel 23 via lens 45.
The blue light that LED27 sends is via lens 52,53 and see through above-mentioned beam split mirror wheel 23.
Then, the action to above-mentioned embodiment describes.
In addition, as stated, below shown in action all after the operation program that will be read from program storage 36 by CPU34 and fixed data etc. are launched primary memory 35 and stored, carry out.
In addition, for the purpose of simplifying the description, when supposing projection 1 color image frame, for example, this frame is constituted the also image of this color of projection by R (red), G (green), W (in vain), these 4 fields of B (indigo plant).Among the W (in vain), make LD18 that green light uses, LED26 that red light is used, and the LED27 that uses of blue light all simultaneously luminous after, micro-reflector element 14 demonstrations and brightness signal Y (Y=0.299R+0.587G+0.114B) be image accordingly.
Fig. 3 is a process flow diagram of extracting the contents processing of the color balance correction of carrying out during the power connection of expression data projection machine 10 that relates generally to light source out.
Under the state of energized; CPU34 carry out by micro-reflector element 14 forms with by the corresponding optical image of picture signal of input part 11 inputs, 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 the next frame timing is the frame timing (step S102) that is used to carry out the correction of the color balance of light source.
The frame of supposing to be used to carry out the color balance correction of this light source regularly for example is set at one hour once, if frame rate is 60 (frames/second), then with the frequency execution of 210,000 6 thousand frames 1 time.
Being judged as next frame regularly is not to be used to carry out under the frame situation regularly of color balance correction of light source, and CPU34 judges these situation at step S102, returns the processing that begins from above-mentioned steps S101 again.
Like this, through the processing of execution in step S101, S102 repeatedly,, wait for the frame timing that becomes the color balance correction that is used to carry out light source on one side on one side CPU34 carries out the processing that relates to common projection action.
Then; If the frame that next frame regularly becomes the color balance correction that is used to carry out light source regularly; Then CPU34 judges these situation in above-mentioned steps S102; In the R field of the beginning that is arranged in 1 follow-up frame, make micro-reflector element 14 show that whole face is carried out projection (step S103) for black image always in this field interval.
The action that Fig. 4 representes to be used to carry out 1 interframe during the image projection of light source colour balance correction regularly.Shown in this figure (A), this 1 frame is made up 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.
Shown in Fig. 4 (B), the LED26 that emitting red light is used is driven by projection process portion 13, with R field and W field respectively during luminous.
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 G field and W field respectively during luminous.
Shown in Fig. 4 (D), the LED27 that blue-light-emitting is used is driven by projection process portion 13, and is luminous with two the continuous field intervals in W field and B field.
In addition; In the R field; Shown in Fig. 4 (E), the fan-shaped side face position of the illuminated red light from above-mentioned LED26 of beam split mirror wheel 20 is the transparent component or the otch of transparent glass or acrylic resin etc., almost sees through the red light from LED26 with the harmless lost territory of the efficient of 100 (%).
On the other hand; Shown in Fig. 4 (F); Side face position in the illuminated red light from above-mentioned LED26 of beam split mirror wheel 23 is formed with catoptron, and the red light from LED26 that will almost see through beam split mirror wheel 20 with the harmless lost territory of the efficient of 100 (%) carried out total reflection.
In above-mentioned steps S103; Show whole result for black image; Whole reflected light is as blocking light in micro-reflector element 14, projects the not shown light absorption part that the non-projection of disposing illuminance transducer 28 is used, rather than projects projecting lens portion 17.On this light absorption part, be coated with and be used for not making the blocking light reflection and with its absorption and be transformed to the heat-resisting paint of the black of heat.
CPU34 is in the timing of the substantial middle that is positioned at 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).
CPU34 is based on the temperature T hR of the LED26 that is detected by temperature sensor 30 that obtains through projection process portion 13; The illumination Ilm that is measured by illuminance transducer 28 to obtaining through projection process portion 13 equally revises; Obtain the correct illumination of LED26 thus; And, calculate the output regulated value of LED26 based on resulting illumination with at the current value that this is driving constantly, specifically calculate driving current value (step S105).
Fig. 5 is the luminous output of expression LD and LED and the figure that receives the relation that receives light value of its luminous illuminance transducer.Among this figure, with respect to the temperature T h of LD that representes with solid line and LED, the same characteristic during temperature higher (Th+) representes that with dot-and-dash line the same characteristic during temperature lower (Th-) dots.Usually; As far as semiconductor light-emitting elements, temperature is high more then more to the direction displacement (shift) of emission wavelength long (frequency is low), even and the luminous output of the light source of irradiation identical; The sensitivity of the longer then illuminance transducer of its wavelength is high more, produces the higher mensuration result of illumination.
Promptly; The temperature of semiconductor light-emitting elements is high more, more to the long direction displacement of emission wavelength, expression LD among Fig. 5 and the luminous output of LED and receive its luminous illuminance transducer the relation that receives light value straight line degree of tilt, be that the differential coefficient of above-mentioned straight line is big more.
Consider this character, CPU34 revises the mensuration result of illuminance transducer 28 based on the testing result ThR of temperature sensor 30, can understand the accurate light emission output of LED26 thus, can calculate the correct driving current value as its regulated value.
For example utilize the mensuration result of illuminance transducer 28 and the mensuration result of temperature sensor 30, generate the arithmetic expression (numerical expression 1) of the modified value of the illumination that obtains semiconductor light-emitting elements in advance, this arithmetic expression is stored in the program storage.
Y '=f (Y, ThR) (numerical expression 1)
(Y ': the revised brightness value of semiconductor light-emitting elements, Y: the mensuration result of illuminance transducer 28, ThR: the testing result of temperature sensor 30)
And CPU34 reads the above-mentioned amendment type of storage based on the testing result ThR of the temperature sensor 30 of reality, and the mensuration result of illuminance transducer 28 is revised.
And then; Program storage stores following arithmetic expression; This arithmetic expression is used for according to the revised value of the illumination of the semiconductor light-emitting elements of being calculated 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 the semiconductor light-emitting elements :) in order to make semiconductor light-emitting elements and the driving current value that needs luminous with revised brightness value
And CPU34 measures the driving current value of measuring semiconductor light-emitting elements regularly based on the testing result ThR of the temperature sensor 30 of reality, reads the above-mentioned numerical expression 2 of storage, and driving current value is revised.
In addition; For example also can be; Utilize illuminance transducer 28 mensuration result, temperature sensor 30 mensuration result and be applied to the driving current value on the semiconductor light-emitting elements; Generate in advance the arithmetic expression (numerical expression 3) of the coefficient A that obtains being used for the illumination correction, this arithmetic expression is stored in the program storage.
A=f (Y, ThR, i) (numerical expression 3)
(A: the coefficient that is used for the illumination correction)
And CPU34 stores following arithmetic expression, and this arithmetic expression is used for according to the coefficient A that is 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 of needs luminous with revised brightness value.
I '=f (A, i) (numerical expression 4)
And CPU34 reads the above-mentioned numerical expression 4 of storage when revising, driving current value is revised.
Afterwards, CPU34 in the G field of above-mentioned R field, also makes micro-reflector element 14 show that whole face is carried out projection (step S106) always for black image in this field interval follow-up.
In this G field; Shown in Fig. 4 (E); Beam split mirror wheel 20 promptly see through red (R) light and blueness (B) light by GRM and the spectroscope of reflection green (G) light constitutes via the side face position of the illuminated blue light from above-mentioned LD18 of catoptron 19, see through blue light from LD18, make it to phosphor layers 21g of fluorescent wheel 21 irradiation; And reflection makes it penetrate to beam split mirror wheel 23 directions by the green light of this phosphor layers 21g excitation.
On the other hand, shown in Fig. 4 (F), on the side face position of the illuminated above-mentioned green light of beam split mirror wheel 23, be formed with catoptron, will almost carry out total reflection by beam split mirror wheel 20 with the green light of the efficient of 100 (%) harmless lost territory reflection.
In above-mentioned steps S106, show whole result for black image; Whole reflected light is as blocking light in micro-reflector element 14; Project the not shown light absorption part that the non-projection of disposing illuminance transducer 28 is used, rather than project projecting lens portion 17.Coating is used for not making the blocking light reflection and with its absorption and be transformed to the heat-resisting paint of the black of heat on this light absorption part.
CPU34 is in the timing of the substantial middle that is positioned at 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 simultaneously at the temperature T hG of luminous LD18 of this moment (step S107).
CPU34 is based on the temperature T hG of the LD18 that is detected by temperature sensor 29 that obtains via projection process portion 13; The illumination IIlm based on illuminance transducer 28 to obtaining via projection process portion 13 equally revises; Obtain the correct illumination of LD18 thus; And, calculate the output regulated value of LD18 based on the illumination that obtains with at the current value that this is driving constantly, specifically calculate driving current value (step S108).
Afterwards, CPU34 follow-up in the W field of above-mentioned G field, make LD18, LED26, and LED27 all luminous, carry out the common projection (step S109) that makes micro-reflector element 14 display brightness images.
In this W field; Shown in Fig. 4 (E); The side face position via the illuminated blue light from above-mentioned LD18 of catoptron 19 of beam split mirror wheel 20 equally with the G field of its front promptly sees through red (R) light and blueness (B) light and the spectroscope of reflection green (G) light constitutes by GRM.
Therefore, see through from the blue light of LD18 and make its phosphor layers 21g that shines fluorescent wheel 21, reflection is by the green light of this phosphor layers 21g excitation and it is penetrated to beam split mirror wheel 23 directions.
In addition, simultaneously, see through beam split mirror wheel 20 and arrive above-mentioned beam split mirror wheel 23 from the red light of above-mentioned LED26.
On the other hand; Shown in Fig. 4 (F); The illuminated above-mentioned red light of beam split 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 constitute by BTM; Reflect from the red light of LED26 and from the green light of phosphor layers 21g, see through blue light simultaneously from LED27.
Therefore, with red light, green light, and blue light mix and the white light that forms shines micro-reflector element 14, form the optical image of brightness according to the luminance picture that shows by micro-reflector element 14, radiate to projection objects by projecting lens portion 17.
Afterwards, CPU34 in the B field of above-mentioned W field, makes micro-reflector element 14 show that whole face is carried out projection (step S110) always for black image in this field interval follow-up once more.
In this B field; Has only LED27 by driving and luminous; Shown in Fig. 4 (F), the side face position of the illuminated above-mentioned blue light of beam split mirror wheel 23 is transparent component or otch such as transparent glass or acrylic resin, almost sees through the blue light from LED27 with the harmless lost territory of the efficient of 100 (%).
In above-mentioned steps S110, show whole result for black image; Whole reflected light is as blocking light in micro-reflector element 14; Project the not shown light absorption part that the non-projection of disposing illuminance transducer 28 is used, rather than project projecting lens portion 17.Coating is used for not making the blocking light reflection and with its absorption and be transformed to the heat-resisting paint of the black of heat on this light absorption part.
CPU34 is in the timing of the substantial middle that is positioned at 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 simultaneously at the temperature T hB of luminous LED27 of this moment (step S111).
CPU34 is based on the temperature T hB of the LED27 that is detected by temperature sensor 31 that obtains via projection process portion 13; The illumination IIIlm that is detected by illuminance transducer 28 to obtaining via projection process portion 13 equally revises; Obtain the correct illumination of LED27 thus; And, calculate the output regulated value of LED27 based on the illumination that obtains with at the current value that this is driving constantly, specifically calculate driving current value (step S112).
More than; Based on calculating three-color light source new driving current value separately; CPU34 sets the LED26 that red light use, the LD18 that sends blue light that is used to encourage green light, and each driving current value (step S113) of the LED27 that uses of blue light in projection process portion 13; Accomplish a series of processing relevant thus, and return the processing that above-mentioned steps S101 rises, to prepare the processing of next color balance correction with the color balance correction of light source.
Fig. 6 is the figure of notion of the correction of the color balance that carries out based on the processing of above-mentioned Fig. 3 of expression.
Fig. 6 (A) is illustrated in the output that obtains correct each color when white under the situation of sending R, G, B three coloured light simultaneously.Shown in Fig. 6 (A), each output of R, G, B obtains balance, therefore as a result of can access the white as their colour mixture, can carry out the image projection under the correct color balance.
Then, Fig. 6 (B) illustration is by R, G, the B mensuration result of all kinds of illuminance transducer 28 mensuration.Therefore as shown in the figure, in this Fig. 6 (B), the result that respectively measures of R, G, B also obtains balance on the surface, seems as a result of, also as the setting obtains correct color temperature as their white of colour mixture.
Yet Fig. 6 (C) expression is based on that detected temperature in each light source is implemented to revise to the mensuration result among above-mentioned Fig. 6 (B) and the result that obtains is the size of correct illumination.Temperature based on the semiconductor light-emitting elements of such each light source of formation is revised, and can access the balance of the variation of the sensitivity of the wavelength-shift that caused by temperature and consequential illuminance transducer 28 being carried out correct illumination revised, of all kinds thus.
Therefore,, calculate and set the driving current value that is used to regulate each light source, thus shown in Fig. 6 (D), can make light source luminescent of all kinds with the luminous intensity that is not from the surface but has in fact correctly obtained color balance according to above-mentioned revised result.
According to aforesaid embodiment, even constitute the LD18, LED26 of light source, the temperature of semiconductor light-emitting elements such as 27 changes, and also can keep correct tone with not destroying color balance.
In addition; In the above-described embodiment; Through illuminance transducer 28 being configured in the irradiation position of above-mentioned blocking light, can influencing by micro-reflector element 14 and form and detect illumination intensity of light source to micro-reflector element 14 irradiations by the optical image that projecting lens portion 17 is used for projection.
And then; In the above-described embodiment, in a series of processing relevant, make micro-reflector element 14 be presented at whole image in R, G, each colour field of B for deceiving with the color balance correction of light source; Thereby owing to be 1 color framing only; So human eye visually can recognize hardly, even but be interrupted for fear of small but projected image, be made as in being arranged at frame W field midway do not measure, detection etc.; And, continue not have the projection action of sense of discomfort so can remove the small interruption of projected image by micro-reflector element 14 display brightness images and by 17 projections of projecting lens portion.
In this, the field of carrying out common image projection at frame midway is not limited to the W field, also can carry out at the brighter Y of image (Huang), makes semiconductor light-emitting elements that sends redness (R) light and the semiconductor light-emitting elements that sends green (G) light simultaneously luminous.
In addition; In the above-mentioned embodiment; Carry out the temperature detection of illumination photometry and light source component of all kinds in the timing at R, G, each center of B,, can carry out more accurate correction so can carry out the mensuration of the average illumination of each colour field, the detection of average light-source temperature.
In addition, the data projection machine 10 of this embodiment uses the beam split mirror wheel of rotation that each light is directed to integraph 24, but can certainly use fixing non-rotary spectroscope to realize.
In addition; In the above-described embodiment, produce red light, be used to produce green light from the rayed fluorescent wheel 21 of LD18 by LED26; Produce blue light by LED27; But be not limited thereto, for example also can use LED or LD to produce the light of all colors, for example also can the light of taking turns 21 irradiations to fluorescent be used in and produce green and blue light.
In addition, different with above-mentioned embodiment, also can be in advance the question blank that is used for revising light illumination be stored in program storage.For example, use like Fig. 7, the question blank shown in 8.Fig. 7 is a skeleton diagram of obtaining the question blank of the correction factor that when deciding modified value according to the measured value of light illumination and temperature, uses, and Fig. 8 is the skeleton diagram of question blank (R revises after-current ir ' table) of the driving current value of the red light source led 26 of the correction factor decision obtained according to Fig. 7.In addition, Fig. 7,8 question blank record simply for explanation.
Specifically, at first,, measure this with illuminance transducer 28 and measure illumination constantly with the temperature that temperature sensor 30 is measured as the LED26 of red light source.And, with reference to the table of the R modified value Ar in the question blank of Fig. 7, use resulting temperature and illumination, decide red correction factor Ar.Likewise, with the temperature of temperature sensor 29 mensuration LD18, measure this with illuminance transducer 28 and measure illumination constantly.And, use resulting temperature and illumination with reference to the table of the G modified value Ag in the question blank of Fig. 7, decide green correction factor Ag.Likewise, with the temperature of temperature sensor 31 mensuration LED27, measure this with illuminance transducer 28 and measure illumination constantly.And, with reference to the table of the B modified value Ab in the question blank of Fig. 7, use resulting temperature and illumination, decide blue correction factor Ab.
And, the question blank of the revised driving current value of the light source led of being put down in writing among reference decision Fig. 8 26, decision 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, based on the value of Ar-Ag that obtains and Ar-Ab, set the driving current value ir ' of LED26.In addition, also store same question blank, also driving current value ig ', ib ' are set for LD18, LED27.Use this question blank to revise the driving current value of light source, even constitute the LD18, LED26 of light source thus, the temperature of semiconductor light-emitting elements such as 27 changes, and does not keep correct tone with also can not destroying color balance.
Those skilled in the art can reckon with other improvement and beneficial effect, and therefore, the present invention is not limited to the above-mentioned specific descriptions and the representational embodiment of instructions.Corresponding various improvement still belongs in the scope of the inventive concept of being confirmed by claim and equivalent thereof.
Claims (7)
1. projection arrangement is characterized in that possessing:
The multiple semiconductor light-emitting elements that emission wavelength is different;
Input part, received image signal;
Optical image formation portion makes said semiconductor light-emitting elements luminous and the light source light that obtains forms the corresponding optical image of picture signal with said input part input;
Projection will be carried out to projection objects by the optical image that the said optical image portion of formation in the Projection Division;
Temperature detecting part is to said semiconductor light-emitting elements, by the temperature of species detection when luminous;
Determination part to said semiconductor light-emitting elements, is measured the light intensity when luminous by kind; And
Light emitting control portion uses the testing result of said temperature detecting part, the mensuration result of said determination part is revised, and based on revised said mensuration result, control the luminous intensity of each said semiconductor light-emitting elements.
2. projection arrangement as claimed in claim 1 is characterized in that,
Said determination part uses in said optical image formation portion not the reflected light to the direction reflection of said Projection Division, measures said light intensity.
3. projection arrangement as claimed in claim 2 is characterized in that,
Said optical image formation portion be provided with make said semiconductor light-emitting elements with single kind luminous during with make a plurality of kinds simultaneously luminous during; When measuring by said determination part; Said with single kind luminous during; Form whole respectively and be black optical image, make a plurality of kinds simultaneously luminous during, form the corresponding optical image of picture signal with said input part input.
4. projection arrangement as claimed in claim 1 is characterized in that,
Said temperature detecting part and said determination part be to said semiconductor light-emitting elements, carries out temperature detection and the mensuration of light intensity when luminous by the timing of the approximate centre of kind between each light emission period.
5. projection arrangement as claimed in claim 1 is characterized in that,
Said light emitting control portion is based on the testing result of said temperature detecting part; Carry out pre-prepd arithmetic expression; And, after the mensuration result of said determination part revised, control the luminous intensity of each said semiconductor light-emitting elements according to the operation result of said arithmetic expression.
6. projection arrangement as claimed in claim 1 is characterized in that,
Said light emitting control portion is based on the testing result of said temperature detecting part, after with reference to cut-and-dried question blank the mensuration result of said determination part being revised, controls the luminous intensity of each said semiconductor light-emitting elements.
7. projecting method, it is the projecting method in the following apparatus, this device possesses: the multiple semiconductor light-emitting elements that emission wavelength is different; Input part, received image signal; Optical image formation portion makes said semiconductor light-emitting elements luminous and the light source light that obtains forms the corresponding optical image of picture signal with said input part input; And the Projection Division, will carry out projection to projection objects by the optical image that the said optical image portion of formation, said projecting method is characterised in that, comprising:
The temperature detection operation is to said semiconductor light-emitting elements, by the temperature of species detection when luminous;
Measure operation,, measure the light intensity when luminous by kind to said semiconductor light-emitting elements; And
The light emitting control operation is used the testing result in the said temperature detection operation, the mensuration result in the said mensuration operation is revised, and based on revised said mensuration result, control the luminous intensity of each said semiconductor light-emitting elements.
Applications Claiming Priority (4)
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| JP2011070007 | 2011-03-28 | ||
| JP070007/2011 | 2011-03-28 | ||
| JP2012022865 | 2012-02-06 | ||
| JP022865/2012 | 2012-02-06 |
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Also Published As
| Publication number | Publication date |
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| TW201248297A (en) | 2012-12-01 |
| TWI446095B (en) | 2014-07-21 |
| CN102722076B (en) | 2014-12-17 |
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