CN1815348B - Projection-type displaying device - Google Patents
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- CN1815348B CN1815348B CN 200510007281 CN200510007281A CN1815348B CN 1815348 B CN1815348 B CN 1815348B CN 200510007281 CN200510007281 CN 200510007281 CN 200510007281 A CN200510007281 A CN 200510007281A CN 1815348 B CN1815348 B CN 1815348B
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Abstract
The invention provides a projection type display device which realizes lightweight, minitype, low power expenditure, low noise, and low cost. The projection type display device comprises: a solid light source array formed by arraying the solid light source of an emitting light; a reflector device for time modulation of an incident light through control of an emitting direction of the light entering from the solid light source array; and a projection unit for projecting the modulated light, furthermore the projection type display device also comprises a measurement unit for measuring an emitting light intensity from the reflector device, wherein the emitting light intensity measured by the measurement unit is corrected to a normal intensity to drive the reflector device, the measurement unit can be configured insertedly or apart in a light path between the reflector device and the projection unit.
Description
Technical field
The present invention relates to the control method of projection display device and projection display device and the control program of projection display device.
Background technology
[patent documentation 1] spy opens the 2003-186110 communique
[non-patent literature 1] " Nikkei エ レ Network ト ロ ニ Network ス ", on November 24th, 2003, p.114.
At present, as optical modulation device, except liquid crystal indicator (LCD), for example it is also known for: the projection display device (Projector) of the reflector apparatus such as DMD (Digital Micromirror Device, registered trademark) element of use TI (Texas Instruments) company etc.
Light source as this projection display device, usually use the high-pressure mercury-vapor lamp that penetrates white light, by using colour wheel that emitted white light is separated into R, G, B look at time-axis direction, and each micro-reflector that uses the DMD element during to usable reflection of all kinds intercropping further adjust, form projected image (for example, with reference to non-patent literature 1.)。
Yet when using the hot thermal light source of generation as described above as lighting source, the problem that thermal light source exists is: the conversion efficiency of the power conversions Cheng Guang that is imported is reduced, and the input voltage height, power consumption increases.And also there is following problem in thermal light source: the size of power supply and lamp is big, and it is big that projection display device becomes, and must have the good cooling fan of efficient that is used to make the thermal light source cooling, and the noise that causes because of the driving sound of cooling fan becomes big.
In patent documentation 1, in order to address the above problem, a kind of technology is disclosed, this technology uses the light emitting diode (LED) that penetrates R (red), G (green), each coloured light of B (indigo plant) as light source.Each coloured light that penetrates from LED is reflected by colour splitting prism, is imported into the DMD element.
Yet in the method, the problem of existence is: even in order to make from each coloured light of LED ejaculation, need colour splitting prism, and cost uprises, and projection display device becomes big.
Be inserted on the light path between reflector apparatus and the absorber, but the invalid light intensity of instrumentation.And, can obtain the correction coefficient of light modulated according to invalid light intensity, can become prescribed strength to the strength control of light modulated.
And because the invalid light intensity of instrumentation, thereby just at projected image the time, but therefore the also invalid light intensity of instrumentation always can prevent that picture element from descending.
And, when invalid light time of instrumentation not, owing to always make the invalid light of absorbent body, thereby can prevent determination unit generation deterioration.
In the control method of projection display device of the present invention, this projection display device has: the solid light source array, and it is the solid light source that penetrates light to be arranged form; Reflector apparatus, it is by the ejaculation direction of control from the light of solid light source array incident, and the light of institute's incident is carried out the time modulation; And projecting cell, the light after its projection modulation; This control method is characterised in that, measures the modulation light intensity that penetrates from reflector apparatus, calculates the correction coefficient that makes the modulation light intensity become prescribed strength, comes reflector apparatus is carried out drive controlling according to the correction coefficient of being calculated.
That is, the control method of projection display device of the present invention can be controlled to prescribed strength to the ejaculation light intensity from reflector apparatus by reflector apparatus is carried out drive controlling.Therefore, can not be subjected to the influence of the external factor of light source ages etc., can show the image of regulation brightness.
Description of drawings
Fig. 1 is the skeleton diagram of projection display device according to the embodiment of the present invention.
Fig. 2 is the plan view that the summary of lighting device according to the embodiment of the present invention is shown.
Fig. 3 is the figure that the time modulation to according to the embodiment of the present invention reflector apparatus describes.
Fig. 4 is the figure that the time modulation to according to the embodiment of the present invention reflector apparatus and LED describes.
Fig. 5 is the block scheme of formation that the driving circuit of projection display device is shown.
Fig. 6 is the skeleton diagram according to the projection display device of another embodiment of the present invention.
Fig. 7 is the skeleton diagram according to the projection display device of another embodiment of the present invention.
Fig. 8 is the skeleton diagram according to the projection display device of another embodiment of the present invention.
Fig. 9 is the skeleton diagram according to the projection display device of another embodiment of the present invention.
[symbol description]
1 ... lighting device (solid light source array); 10r, 10g, 10b ... LED (solid light source); 30 ... reflector apparatus; 40 ... measuring element (determination unit); 45 ... absorber; 50 ... prism; 51,51a ... reflecting plate (light element); 70 ... projecting lens (projecting cell)
Embodiment
Below, referring to figs. 1 through Fig. 5 to according to the embodiment of the present invention projection display device and control method thereof with and control program describe.
At first, with reference to Fig. 1, the projection display device according to an embodiment of the invention is described.The projection display device of present embodiment is to use reflector apparatus to R (red), the G (green) that penetrates from led array, the projection type colour display device that B (indigo plant) the different color light time of carrying out modulates color display.
Fig. 1 is the figure that illustrates according to the summary of the projection display device of present embodiment.
Projection display device, as shown in Figure 1, roughly by constituting with the lower part: lighting device (solid light source array) 1, it penetrates the different color light of R, G, B; Reflector apparatus 30, it carries out the time modulation to each coloured light; Measuring element (determination unit) 40, it measures the light intensity that penetrates from reflector apparatus 30; And projecting lens (projecting cell) 70, the light modulated after its projection was modulated by the time.
Fig. 2 is the plan view that the summary of lighting device is shown.
As shown in Figure 2, lighting device 1 constitutes the led array that LED (solid light source) 10r that penetrates R, G, B coloured light respectively, 10g, 10b have been carried out planar configuration.More particularly, in the lighting device 1, LED10r, 10g, 10b form the row of pressing this order repeated arrangement at longitudinal direction, and these row form a plurality of to the transverse direction arrangement.And, between the laterally adjacent row with half of LED configuration space to the longitudinal direction configuration of staggering, make LED10r, 10g, 10b compact configuration.And, be configured to the LED that penetrates identical coloured light non-conterminous.
And, for each coloured light that penetrates from lighting device 1 being pooled to reflector apparatus 30, dispose collector lens 21 at the light emitting side of lighting device 1 as illuminated object.And the light emitting side at lighting device 1 disposes relay lens 22 equally, and this relay lens 22 is directed to reflector apparatus 30 to each coloured light that penetrates from lighting device 1.
In addition, as mentioned above, both can between lighting device 1 and reflector apparatus 30, dispose collector lens 21 and relay lens 22, and, also can append configuration and make from the Illumination Distribution uniform for example fly lens and the such integration lens of rod lens of each coloured light of lighting device 1 ejaculation.
Absorber 45 is configured to absorb the invalid light that penetrates from reflector apparatus 30, and can change configuration with measuring element 40 described later.
Dispose prism 50 on the path of the light modulated between reflector apparatus 30 and the projecting lens 70, this prism 50 is directed to projecting lens 70 to the light that penetrates from reflector apparatus 30.Prism 50 adopts the structure that triangular prism is pasted, and face is the diagonal angle wire and is formed with reflection modulation reflection of light minute surface within it.And, opposed with the mirror surface of prism 50 and with the face of the face adjacency of light modulated incident on dispose reflection modulation reflection of light plate (light element) 51.
Measuring element 40 can be changed configuration with aforesaid absorber 45, and is configured to and can carries out instrumentation to the invalid light intensity from reflector apparatus 30.Charge-coupled device (CCD)), the optical sensor of CMOS etc. is configured to rectangular parts and constitutes and measuring element 40 is by for example CCD (Charge Coupled Device:.
Projecting lens 70 is configured to make the light modulated enlarging projection that penetrates from prism 50 to projection screen 71.
Below, the effect of projection display device in image projection of above-mentioned formation described.
At first, when projected image, as shown in Figure 1, absorber 45 is configured the invalid light that absorber 45 is absorbed from reflector apparatus 30.
Then, as depicted in figs. 1 and 2, the LED10r of lighting device 1,10g, 10b distinguish the bright lamp of timesharing at the coloured light of RGB.Each coloured light that penetrates from lighting device 1 timesharing incides on the reflector apparatus 30 by collector lens 21 and relay lens 22.
Incide each coloured light on the reflector apparatus 30 according to the signal of video signal that is input to projection display device, carry out the time modulation respectively at each micro-reflector, light modulated is to prism 50 reflections, and invalid light is to absorber 45 reflections.
The light modulated that penetrates from reflector apparatus 30 incides on the prism 50, by the reflection of the mirror surface in the prism 50, incides on the reflecting plate 51, and to projecting lens 70 reflections.
Light to the reflection of projecting lens 70 directions incides on the projecting lens 70, and enlarging projection is to projection screen 71.
Herein, to the light modulated timeliness of 1 micro-reflector of reflector apparatus 30 be modulated into prescribed strength method describe.
Fig. 3 (a) is the figure that incides the light intensity of all kinds on the micro-reflector that is illustrated under the situation that makes the bright lamp certain hour of LED.Fig. 3 (b) is the figure that the modulation light intensity of the micro-reflector in the regulation frame is shown.
When making the bright lamp certain hour of LED10r, 10g, 10b, shown in Fig. 3 (a), each coloured light of RGB incides on the micro-reflector of reflector apparatus 30 with intensity separately.RGB under this state light intensity balance performance of all kinds white.According to this state, RGB light intensity balance of all kinds is changed into for example light intensity balance of all kinds of the RGB shown in Fig. 3 (b), show the regulation look.
Fig. 4 illustrates the bright lamp control timing of LED and the time control concept map regularly of micro-reflector.
The method of carrying out above-mentioned RGB light intensity balance change of all kinds by the time modulation is specifically described.
At first, the timing signal (ON) of input micro-reflector drives reflector apparatus, makes the reflected light of the micro-reflector corresponding with color lights R incide on the prism 50.At this moment, micro-reflector is driven in the incoming timing signal, incides angle 1 on the absorber 45 from reflected light and becomes reflected light and incide angle 2 on the prism 50.The angle of micro-reflector incides angle 1 on the absorber 45 from reflected light and becomes the angle 2 that incides on the prism 50 and need the time, is this time set catoptron rotational time Tr.
The LED10r that penetrates color lights R is after the incoming timing signal, and at catoptron rotational time Tr warp bright lamp later, this state is held the stipulated time.
Then, at the appointed time through after, timing signal disconnects, like this, LED10r turns off the light, and the direction of micro-reflector is driven, and makes that the angle that reflected light incides on the absorber 45 is an angle 1.The drive controlling of the micro-reflector of this reflector apparatus 30 can be carried out according to the order of magnitude about 5000Hz.
Remaining coloured light G and coloured light B are also carried out above control, carry out RGB light intensity balance change of all kinds.
Below, the driving method of the projection display device of present embodiment is described.
Fig. 5 is the block scheme of formation that the driving circuit of the projection display device in the present embodiment is shown.
At first, to using measuring element 40 to become the intensity correction of the light modulated that penetrates from reflector apparatus 30 adquisitiones of the correction parameter of prescribed strength to describe.
At first, as shown in Figure 1, configuration measuring element 40 replaces absorber 45, and the invalid light from reflector apparatus 30 is incided on the measuring element 40.
Then, as shown in Figure 5, control part 82 couples of LED10r, 10g, 10b control, and make to every coloured light with the bright lamp certain hour of constant voltage.Then, control part 82 is controlled, and makes the invalid light of the regulation micro-reflector of reflector apparatus 30 incide certain hour on the measuring element 40.By control, can obtain the correction parameter of each micro-reflector like this.
The signal that 40 of measuring elements are corresponding with the invalid light intensity of institute incident outputs to reflector apparatus reflected light determination part 41, and reflector apparatus reflected light determination part 41 is calculated the modulation light intensity according to invalid light intensity.
All carrying out above-mentioned modulation light intensity for each coloured light and each micro-reflector calculates.
The modulation light intensity that adopts said method to obtain is input to control part 82.Control part 82 is according to the modulation light intensity, calculate and be used for correction parameter that the usable reflection time of the micro-reflector of each coloured light is controlled, make in that the light modulated from the RGB of each micro-reflector has been carried out under the situation of time integral, become white (for example color temperature is 8300 ° of K) as target.
Then, the correction parameter of each micro-reflector of being calculated is outputed to correction parameter storage part 83, and be stored in the correction parameter storage part 83.
Below, method and the control program that drives projection display device according to signal of video signal described.
In the present embodiment, as shown in Figure 5, for example will be input to A/D converter section 81, and convert thereof into digital signal, and be input to control part 82 from the signal of video signal as simulating signal of PC, DVD, the output of TV antenna.
In addition, be under the situation of digital signal at the signal of video signal that is input to projection display device, do not need analog signal conversion is become the A/D converter section 81 of digital signal, can be directly inputted to control part 82 to digital signal.And, at the signal of video signal that is input to projection display device is for example under compression such as the MPEG2 data conditions, both can have the lsb decoder that packed data is decoded and replace A/D converter section 81, compressed signal is input to lsb decoder, also can make control part 82 have decoding function, compressed signal is input to control part 82.
In control part 82, according to the signal of video signal that converts digital signal to and be stored in correction parameter in the correction parameter storage part 83, generate modulator control signal to reflector apparatus 30.The modulator control signal that is generated is outputed to reflector apparatus driver 29, and reflector apparatus driver 29 is according to modulator control signal, and each micro-reflector of reflector apparatus 30 is carried out drive controlling.
And,, simultaneously, according to the signal of video signal that converts digital signal to and be stored in correction parameter in the correction parameter storage part 83, generate the light source control signal that the bright lamp of LED10r, 10g, 10b is turned off the light and controlled at control part 82.The light source control signal that is generated is outputed to LED power control part 84, and LED power control part 84 passes through led driver 85, the bright lamp of each LED10r, 10g, 10b is turned off the light control.
In addition, both obtaining of this correction parameter can only be carried out once when making and dispatching from the factory this projection display device, also can regularly obtain correction parameter after dispatching from the factory.
When dispatching from the factory, only obtain the method for a correction parameter, owing to after dispatching from the factory, do not use measuring element 40, thereby can take off measuring element 40, realize the light weight miniaturization and the low price of projection type display element easily.
After dispatching from the factory, also regularly obtain the method for correction parameter, can tackle variation because of the aging colour balance that causes of LED10r, 10g, 10b and reflector apparatus 30 etc., keep the high-quality image of putting easily.
In addition, as mentioned above, both measuring element 40 and absorber 45 can be disposed replaceably, also measuring element 40 can be also used as absorber 45.According to this formation, owing to just at projected image the time, also can use the invalid light intensity of measuring element 40 instrumentations, thereby always can prevent that picture element from descending.And, owing to do not need to have respectively measuring element 40 and absorber 45, thereby be favourable to the light weight miniaturization that realizes projection display device.
According to above-mentioned formation, owing to use LED10r, 10g, 10b as light source, thereby compare with above-mentioned high-pressure mercury-vapor lamp, the efficient height of input power conversions Cheng Guang, under the situation that obtains same brightness, input electric power (low consumption electrification) can be reduced,, thereby the noise (low noiseization) of cooling fan etc. can be prevented because thermal value is also few.And because LED10r, 10g, 10b self be than high-pressure mercury-vapor lamp light weight and small-sized, the circuit of driving LED 10r, 10g, 10b also can use the circuit more small-sized than the driving circuit of high-pressure mercury-vapor lamp.And because these advantages are compared as light source with using high-pressure mercury-vapor lamp, using LED10r, 10g, 10b is favourable as light source to the low price of realizing projection display device.
Be used as led array and use because LED10r, 10g, 10b arranged, thereby have light that uniform illumination distributes and incide on the face as the reflector apparatus 30 of the illuminated object of light source.Therefore, not needing to have colour splitting prism as above-mentioned patent documentation 1, is favourable to light weight miniaturization, the low price of realizing projection display device.
And, owing to arranging, LED10r, 10g, the 10b that will penetrate each coloured light of RGB form led array, thereby do not need to have the colour splitting prism of synthetic different color light, and just can form coloured image, be favourable to light weight miniaturization, the low price of realizing projection display device.
Can control ejaculation light intensity respectively at each micro-reflector from reflector apparatus 30.Therefore, for example, owing to can be controlled to prescribed strength to ejaculation light intensity from each coloured light of reflector apparatus 30, thereby can be controlled to the regulation balance to the colour balance of the image of institute's projection.And, can not be subjected to the influence of the external factor of light source ages etc., can show the image of regulation brightness.
When using 40 pairs of ejaculation light intensities of measuring element to carry out instrumentation from reflector apparatus 30, change configuration by making measuring element 40 and absorber 45, but the invalid light intensity of instrumentation.
Because there are 1 pair 1 relation in light modulated and invalid light, thereby can not obtain the correction parameter of light modulated, can become prescribed strength to the strength control that incides the light modulated on the projecting lens 70 according to inciding invalid light intensity on the projecting lens 70.
And because the invalid light intensity of instrumentation, thereby just at projected image the time, but therefore the also invalid light intensity of instrumentation always can prevent that picture element from descending.And, when the invalid light intensity of instrumentation not, owing to always make the invalid light of absorbent body, thereby can prevent that measuring element 40 from deteriorations taking place.
In addition, measuring element 40 as mentioned above, both can be changed configuration with absorber 45, also can change configuration with reflecting plate 51 as shown in Figure 6.According to this formation, can use measuring element 40 direct instrumentation modulate light intensity, but instrumentation modulate light intensity accurately.Therefore, can easily obtain correction parameter accurately, can be controlled to prescribed strength to modulate light intensity exactly.And, when instrumentation modulate light intensity not, owing to can make measuring element 40 and original reflecting plate 51 change configuration, thereby can prevent that measuring element 40 from because of the light of incident deterioration taking place.
And, as shown in Figure 7, measuring element 40 can be configured to insert or to leave the modulation light path between reflector apparatus 30 and the prism 50.According to this formation, when not using measuring element 40 instrumentations to penetrate light intensity, can make measuring element 40 leave the path of light modulated, bring influence can for the image of institute's projection, can prevent that picture element from descending.And, when the instrumentation modulate light intensity, because instrumentation is carried out in the path of measuring element 40 insertion light modulated, thereby direct instrumentation light modulated, but instrumentation modulate light intensity accurately.Therefore, can easily obtain correction parameter accurately, can be controlled to prescribed strength to the modulation light intensity exactly.
And as shown in Figure 8, reflecting plate is to have the permeability reflecting plate 51a that a few percent of the light modulated of the incident of making sees through, and measuring element 4 also can be configured to the light modulated that has seen through reflecting plate 51a is carried out instrumentation.Constitute according to this, because determination unit carries out instrumentation to ejaculation light (light modulated) intensity that has seen through reflecting plate, thereby determination unit bring influence can not for the image of institute's projection, can prevent that picture element from descending.And, owing to just at projected image the time, also can use determination unit to measure and penetrate light intensity, thereby always can prevent that picture element from descending.
And as shown in Figure 9, instrumentation is carried out in the brightness that also can use 40 pairs of measuring elements to project to the image on the projection screen 71.According to this formation, owing to do not need measuring element 40 is arranged in the projection display device, thereby can realize the light weight miniaturization of projection display device.
In addition, technical scope of the present invention is not limited to above-mentioned embodiment, can apply various changes in the scope that does not deviate from main idea of the present invention.
For example, in the above-described embodiment, the led array that is applicable to the coloured light that use the to penetrate RGB formation as light source is described, yet is not limited to penetrate the led array of different color light, applicable to the formation that in the led array that penetrates white light, has colour wheel etc. and other various formations.
And, in the above-described embodiment, to being applicable to that the formation of using measuring element 40 to calculate correction parameter is described, yet be not limited to use the formation of this measuring element 40, can be applicable to looking the hearer according to the formation of hobby input correction parameter etc. and other various formations.
Claims (6)
1. projection display device,
Have: the solid light source array, it is the solid light source that penetrates light to be arranged form; Reflector apparatus, it is modulated the light time of carrying out of institute's incident by the ejaculation direction of control from the light of aforementioned solid light source array incident; And projecting cell, the light after its projection modulation,
Described projection display device is characterized in that,
Also have determination unit, this determination unit carries out instrumentation to the ejaculation light intensity from aforementioned reflector apparatus;
The aforementioned ejaculation light intensity of being measured by aforementioned determination unit is corrected into prescribed strength, driving aforementioned reflector apparatus,
Aforementioned determination unit can be configured on the light path between aforementioned reflector apparatus and the aforementioned projecting cell with inserting or leave.
2. projection display device according to claim 1 is characterized in that,
Have light element between aforementioned reflector apparatus and aforementioned projecting cell, this light element is directed to aforementioned projecting cell to the light modulated that penetrates from aforementioned reflector apparatus;
Aforementioned determination unit and aforementioned light element can be changed configuration.
3. projection display device according to claim 1 is characterized in that,
Have reflecting plate between aforementioned reflector apparatus and aforementioned projecting cell, this reflecting plate will reflect to aforementioned projecting cell from the light modulated that aforementioned reflector apparatus penetrates;
Aforementioned reflecting plate is the photopermeability reflecting plate that the part of the light of institute's incident is seen through;
Aforementioned determination unit is configured in the position that can carry out instrumentation to the light that has seen through aforementioned reflecting plate.
4. projection display device according to claim 1 is characterized in that,
Have absorber, this absorbent body is from the ejaculation light on the projecting cell of not inciding in the ejaculation light of aforementioned reflector apparatus;
Aforementioned determination unit and aforementioned absorber can be changed configuration.
5. projection display device according to claim 4 is characterized in that,
Aforementioned determination unit is also used as aforementioned absorber.
6. projection display device according to claim 1 is characterized in that,
Have absorber, this absorbent body does not incide ejaculation light on the projecting cell from the light that aforementioned reflector apparatus penetrates;
On the light path between aforementioned reflector apparatus and the aforementioned projecting cell, dispose prism;
Aforementioned determination unit can be configured on the light path between aforementioned reflector apparatus and the aforementioned prism with inserting or leave.
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| CN 200510007281 CN1815348B (en) | 2005-02-06 | 2005-02-06 | Projection-type displaying device |
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| CN 200510007281 CN1815348B (en) | 2005-02-06 | 2005-02-06 | Projection-type displaying device |
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| CN2010102321969A Division CN101893813A (en) | 2005-02-06 | 2005-02-06 | Projection display device |
| CN201210447245.XA Division CN102929081B (en) | 2005-02-06 | 2005-02-06 | Projection type display device |
| CN2009101425154A Division CN101604115B (en) | 2005-02-06 | 2005-02-06 | Projection type display device |
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| CN1815348B true CN1815348B (en) | 2011-04-13 |
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| WO2008127239A1 (en) * | 2007-04-12 | 2008-10-23 | Thomson Licensing | Biaxial mirror color selecting micro mirror imager |
| CN101976015A (en) * | 2010-10-28 | 2011-02-16 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
| CN102012615A (en) * | 2010-10-29 | 2011-04-13 | 鸿富锦精密工业（深圳）有限公司 | Projection device having function of automatically adjusting projection luminance and method |
| CN102073203A (en) * | 2010-11-17 | 2011-05-25 | 鸿富锦精密工业（深圳）有限公司 | Projection device and method capable of automatically adjusting projection brightness |
Citations (2)
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|---|---|---|---|---|
| US5300966A (en) * | 1991-05-23 | 1994-04-05 | Nippon Telegraph And Telephone Corporation | Projector |
| CN1538235A (en) * | 2003-04-18 | 2004-10-20 | �ձ�ʤ����ʽ���� | Light source device and projecton type display deivce using the light source device |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5300966A (en) * | 1991-05-23 | 1994-04-05 | Nippon Telegraph And Telephone Corporation | Projector |
| CN1538235A (en) * | 2003-04-18 | 2004-10-20 | �ձ�ʤ����ʽ���� | Light source device and projecton type display deivce using the light source device |
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