JP2004191839A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector having high performance in spite of being small-sized and inexpensive. <P>SOLUTION: The projector is provided with an optical addressing liquid crystal 20 whose optical characteristics change at an incidence part of addressing light for writing, a writing part 30 making the addressing light incident in the addressing liquid crystal 20 and scanning the optical addressing liquid crystal 20 with the addressing light, a sequential illumination part 40 time sequentially and repetitively making color divided read out light of each color incident in the optical addressing liquid crystal 20 and a controlling device 60 controlling writing timing by the writing part 30 and reading timing by the illumination part 40. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a projector that performs color display using a spatial light modulator such as a liquid crystal light valve that writes information using light.
[0002]
[Prior art]
As a device for projecting a color image using a spatial light modulator as a liquid crystal light valve, for example, readout light emitted from a metal halide lamp is separated into three primary colors by three polarizing beam splitters, and the three spatial light modulators respectively. There is something to guide. Image writing to each spatial light modulator is performed by forming images corresponding to three primary colors on three CRTs facing each other on the back side of the three spatial light modulators (for example, Patent Document 1). Etc.).
[0003]
Further, as a projection device for forming a color image using a single liquid crystal light valve, there is a projection device in which a stripe filter of each color is arranged on an optical path on a reading side of a liquid crystal light valve. In this projection device, the video signal of each color is switched for each stripe region on the liquid crystal light valve corresponding to the color arrangement of the stripe filter, and the laser light intensity-modulated by the video signal is scanned toward the writing side of the liquid crystal light valve. (See Patent Document 2).
[0004]
In addition, as a projection device that forms a color image using a single liquid crystal light valve, a pair of synchronously rotating rotating color filters are arranged on the writing side and the reading side of the liquid crystal light valve, and each color of RGB from the original is There is a type in which an image is sequentially written in time series on the entire liquid crystal light valve and read out in synchronization therewith (see Patent Document 3).
[0005]
[Patent Document 1]
JP-A-5-33367
[Patent Document 2]
JP-A-5-203908
[Patent Document 3]
JP-A-8-278512
[0006]
[Problems to be solved by the invention]
However, in the projection device of the first example using three liquid crystal light valves, it is necessary to provide a CRT for writing, a liquid crystal light valve for display, etc. for each color, which not only increases the size of the optical system but also reduces cost. Causes an increase.
[0007]
Further, in the projection device of the second example in which video signals of each color are switched according to the color arrangement of the stripe filter and the laser beam for scanning is scanned, a certain limit is imposed on the alignment between the stripe filter and the corresponding region of the liquid crystal light valve. Therefore, a high-resolution image cannot be obtained.
[0008]
Furthermore, in the projection device of the third example in which a pair of synchronously rotating rotary color filters are arranged on the writing side and the reading side of the liquid crystal light valve, a device that actually forms an image (for example, a document or a display) is indispensable. This leads to an increase in the size of the optical system. Further, since the actual image is simply projected, it is not easy to adjust or process the image once captured on the spot. Further, in this projection device, the writing light is continuously incident until the irradiation of the reading light is completed. For this reason, when the liquid crystal light valve has the holding characteristic, the time required for completing the writing of the next color, that is, for stabilizing the writing increases, and the ratio of the reading time to the entire reading time decreases to darken the image.
[0009]
Therefore, an object of the present invention is to provide a projection device having high performance while being small and inexpensive.
[0010]
Another object of the present invention is to provide a projection device that can easily achieve high resolution.
[0011]
Another object of the present invention is to provide a projection device capable of performing various image processings by simple signal control without requiring the presence of a real original image. Still another object is to provide a projection device capable of projecting a bright image even when the liquid crystal light valve has a holding characteristic.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a projector according to the present invention includes a spatial light modulator in which optical characteristics change at a location where writing addressing light is incident, and a spatial light modulator in which addressing light is incident on the spatial light modulator. Addressing means for scanning on the apparatus, sequential illumination means for repeatedly irradiating the read light of each color divided into the spatial light modulator in time series, timing of writing by the addressing means and timing of reading by the sequential illumination means, And control means for controlling the Here, the "spatial light modulator" is an optical device represented by a liquid crystal light valve for writing information using light such as an optical addressing liquid crystal, and (1) a portion where addressing light enters, that is, addressing. It has a portion whose characteristics are changed by light, and (2) a portion where the reading light is incident, that is, a portion which modulates the reading light. A liquid crystal light valve for writing information using light is sometimes referred to as a spatial light amplifying element, and such a spatial light amplifying element is a concept included in the “spatial light modulator”.
[0013]
In the projector, since the addressing light is scanned on the spatial light modulator using the addressing means, an arbitrary image can be written at a high speed by modulating the addressing light, and the image writing portion can be reduced in size. . In addition, since the sequential illuminating means repeatedly reads the color-separated readout light of each color into the spatial light modulator in time series, not only can the projector be configured with only a single spatial light modulator, but also the The image is read out, that is, projected on a screen-by-screen basis, and a smooth and high-resolution color image can be obtained.
[0014]
In a specific aspect of the projector, the spatial light modulation device has a holding property of holding an image written by the addressing light for a predetermined time, and the illumination control unit controls writing of one screen of a specific color by the addressing unit. Immediately after the end, the reading of this specific color by the sequential lighting means is started. In this case, it is possible to prevent the image being written from being displayed. In addition, power saving of the projector can be achieved by utilizing the fact that the spatial light modulator has retentivity, that is, hysteresis or memory characteristics. Further, since the time required for completing the writing of the next color can be reduced, the ratio of the reading time to the writing time for the screen of each color can be reduced, and the projected image can be brightened.
[0015]
In a specific aspect of the projector, the sequential lighting unit includes a plurality of solid state light emitting elements corresponding to each color, and the control unit adjusts the timing of turning on and off the solid state light emitting elements to adjust the read timing. Control. In this case, not only can the size of the sequential illuminating means be reduced, but also the timing of irradiating the readout light of each color to the spatial light modulator can be adjusted freely and very precisely.
[0016]
In a specific embodiment of the projector, the control means multiplies the normal light output of each solid state light emitting element by the reciprocal of the operating rate obtained by dividing the frame time by the lighting time of each color, and outputs the solid state light. The light emitting element is turned on. Here, the “frame time” corresponds to a repetition period of one frame in which each color is integrated. In this case, it is possible to obtain an image having a luminance close to the luminance when each solid-state light-emitting element is continuously turned on, while being sequential illumination in which each color is projected in time series.
[0017]
In a specific aspect of the projector, the control unit turns on the solid state light emitting element with a current obtained by multiplying the reciprocal of the operation rate by the rated current for continuous driving of the solid state light emitting element. In this case, each solid state light emitting element can be stably operated as a whole within the range of the rated current while periodically emitting light with a luminance higher than the rating.
[0018]
In a specific aspect of the projector, the projector further includes a scan sensor that is arranged at a predetermined position around the spatial light modulator and detects a scan start and a scan end by addressing light based on the passage of the addressing light, The control means adjusts the timing of starting and ending the lighting of each solid state light emitting element and the timing of modulating the intensity of the addressing light based on the output of the scan sensor. In this case, writing and reading for compensating for a change in the scanning state of the addressing light can be performed immediately, and the image quality of the projected image can be improved.
[0019]
In a specific aspect of the projector, the addressing unit includes a light source that generates addressing light, and a scan mirror that deflects the addressing light from the light source, and the control unit controls each solid-state device based on a drive signal of the scan mirror. The timing of starting and ending the lighting of the light emitting element is adjusted. In this case, it is possible to easily monitor the scanning state of the addressing light using the drive signal of the scan mirror.
[0020]
In a specific aspect of the projector, the sequential lighting unit includes a white light source and a color wheel, and the control unit includes a light-shielding portion provided on the color wheel, and controls the rotation of the color wheel to read out the read timing. Control. In this case, the device portion for irradiating the reading light can have a relatively simple structure.
[0021]
BEST MODE FOR CARRYING OUT THE INVENTION
[First Embodiment]
FIG. 1 is a block diagram conceptually illustrating the overall structure of the projector 10 according to the first embodiment. The projector 10 includes an optical addressing liquid crystal 20 that is a spatial light modulator, a writing unit 30 that is an addressing unit, an illumination unit 40 that is a sequential illumination unit, a projection lens 50, and a control device 60.
[0022]
FIG. 2 is a sectional structural view showing an example of the optical addressing liquid crystal 20 shown in FIG. The optical addressing liquid crystal 20 has a holding property for maintaining a written state for a certain period of time, and a photoconductor layer 25, a mirror layer 26 and a liquid crystal are interposed between a pair of flat glass plates 21 and 22 via transparent electrodes 23 and 24. The laminated structure with the layer 27 is sandwiched. Then, an AC voltage is applied between the pair of transparent electrodes 23 and 24.
[0023]
The outline of the fabrication of the optical addressing liquid crystal 20 is as follows. First, a transparent electrode 23, a photoconductor layer 25, and a mirror layer 26 are sequentially formed on one flat glass 21, and a transparent electrode 24 is formed on the other flat glass 22. Thereafter, the liquid crystal layer 27 is injected and sealed in a gap between the flat glass plates 21 and 22 with the mirror layer 26 and the transparent electrode 24 facing each other, thereby completing the optical addressing liquid crystal 20.
[0024]
When writing to the optical addressing liquid crystal 20, addressing light AB from the writing unit 30 of FIG. 1 is incident on the surface of the flat glass 21 on the writing side, and the conductivity of the photosensitive layer 25 is reduced in the incident area of the addressing light AB. descend. As a result, a voltage is applied to the corresponding region of the liquid crystal layer 27 behind this region, and the polarization characteristics of this corresponding region are switched. At this time, if the photoreceptor layer 25 and the liquid crystal layer 27 have a certain holding property, the state of the liquid crystal layer 27, that is, the polarization characteristics, can be maintained for a certain time or more after the addressing light AB passes. When reading from the optical addressing liquid crystal 20, the colored illumination light CL from the illumination unit 40 of FIG. 1 is incident on the surface of the flat glass 21 on the reading side, and is reflected by the mirror layer 26 while being reflected by the liquid crystal layer 27. The modulated light is emitted as image light IL.
[0025]
Returning to FIG. 1, the writing unit 30 includes a laser light source 31 that generates a modulated laser light, a scan mirror 32 that reflects the laser light from the laser light source 31, and an actuator 33 that adjusts the angle of the scan mirror 32. And a drive unit 35 for appropriately driving the laser light source 31 and the actuator 33 based on an instruction from the control device 60.
[0026]
Here, with respect to the laser light source 31, the generation wavelength is appropriately selected in consideration of the spectral characteristics of the photoconductor layer 25 provided in the optical addressing liquid crystal 20. Further, the scan mirror 32 can be a MEMS (Micro Electro Mechanical Systems) element formed integrally with the actuator 33 by, for example, a thin film forming process on a semiconductor substrate. The scan mirror 32 transmits the addressing light AB from the laser light source 31 to the optical addressing liquid crystal 20. At an arbitrary pixel position on the writing surface 20a, and enables high-speed scanning of the addressing light AB. The addressing light AB is converged through a beam shaping optical system 38 such as a lens, and is incident as a fine spot on the writing surface 20a of the optical addressing liquid crystal 20. The drive unit 35 controls the operation of the laser light source 31 to modulate the intensity of the addressing light AB in accordance with the luminance distribution of the image of each color of RBG. At this time, the drive unit 35 can operate the laser light source 31 and the actuator 33 in synchronization with each other, and modulates the intensity of the addressing light AB in accordance with the pixel position where the addressing light AB is incident every moment.
[0027]
FIG. 3 is a diagram illustrating a specific scanning of the addressing light AB on the writing surface 20a of the optical addressing liquid crystal 20. The pixel point PP on which the addressing light is incident is main-scanned at high speed in the ± X direction and sub-scanned at low speed in the ± Y direction, and writing is performed over the entire writing surface 20a by the entire scanning.
[0028]
Returning to FIG. 1, the lighting unit 40 includes three light emitting diodes 41a, 41b, and 41c, which are solid state light emitting elements, and a drive unit that appropriately emits light from the light emitting diodes 41a, 41b, and 41c based on an instruction from the control device 60. 43. Here, the light emitting diodes 41a, 41b, and 41c respectively generate RGB colors. Illumination light CLa, CLb, CLc of each color from the light emitting diodes 41a, 41b, 41c has a uniform distribution through an optical system (not shown) built in or attached thereto, and passes through the polarizing filter 25. The light uniformly enters the readout surface 20b of the optical addressing liquid crystal 20. The drive unit 43 controls the operation of each of the light emitting diodes 41a, 41b, 41c to adjust the light emission timing of the illumination lights CLa, CLb, CLc. That is, the drive unit 43 illuminates the reading surface 20b of the optical addressing liquid crystal 20 in three sequential colors of RGB in a color sequential manner in synchronization with the addressing light AB from the writing unit 30 incident on the writing surface 20a of the optical addressing liquid crystal 20. I do.
[0029]
The image light IL reflected by the optical addressing liquid crystal 20 and passing through the polarizing filter 25 is modulated in accordance with the luminance distribution of the image of each color, is projected on the screen SC via the projection lens 50, and is RGB Is formed by combining the three primary colors.
[0030]
The control device 60 is a control means for generally controlling the operation of the projector 10. The control device 60 appropriately processes an externally input video signal, gives appropriate drive signals to the drive units 35 and 43, and reads out the readout signal. And the writing timing is controlled to cause the screen SC to perform display corresponding to the video signal.
[0031]
FIG. 4 is a timing chart for explaining the operation of the projector 10 of FIG. 1 and explaining writing and reading controlled by the control device 60. 4A shows the timing of writing by the addressing light AB, FIG. 4B shows the operation of the R color light emitting diode 41a, that is, the timing of reading using the illumination light CLa, and FIG. 4D shows the operation of the G color light emitting diode 41b, ie, the timing of reading using the illumination light CLb, and FIG. 4D shows the operation of the B color light emitting diode 41c, ie, the timing of reading using the illumination light CLc.
[0032]
As shown in FIG. 4A, writing with the addressing light AB occurs three times in one frame, and is repeated at the same cycle. Write time T for each color RGB _wr , T _wg , T _wb Are equal to each other, and are set to a time when scanning of the entire surface of the optical addressing liquid crystal 20 by the addressing light AB is completed. Further, as shown in FIGS. 4B to 4D, the lighting time T of each color RGB _rr , T _rg , T _rb Are all equal, and the time is set to such a degree that the image written in the optical addressing liquid crystal 20 is held. If the frame time Tf is predetermined, T _rr = (Tf-3T _wr ) / 3, the holding time of the optical addressing liquid crystal 20 is set in accordance with this time, so that the lighting time T for each color RGB is set. _rr , T _rg , T _rb It is possible to efficiently project the image of each color RGB on the screen SC.
[0033]
At this time, reading of the same color RGB is started after writing of each color RGB is completed. Therefore, it is possible to prevent an image being written from being displayed. After the start of reading of each color RGB, writing of the same color RGB is not performed, so that the optical addressing liquid crystal 20 and thus the projector 10 can be driven with low power. Further, since the same color RGB is not written during the reading period of each color RGB, the writing of the next color can be easily stabilized, the time required for writing the next color can be shortened, and the projected image can be brightened. Can be.
[0034]
FIG. 5 is a timing chart illustrating a modification of the operation of the projector 10 of FIG. FIG. 5A shows the timing of writing, FIG. 5B shows the timing of reading color R, FIG. 5C shows the timing of reading color G, and FIG. Indicates the timing of reading the color B.
[0035]
The read timing of each color RGB shown in FIGS. 5B to 5D is the same as that shown in FIGS. 4B to 4D. However, the output of each of the light emitting diodes 41a, 41b, 41c, that is, the amount of illumination light is several times larger than that in the case of FIG. Here, assuming that the normal illumination light amount of each color is IN and the lighting time of each color is Tr, the illumination light amount IH of each color is
IH = IN × (Tf / Tr) (Equation 1)
If the reciprocal (Tf / Tr) of the operation rate (Tr / Tf) is about 4, then IH = 4IN, and each of the light emitting diodes 41a, 41b, 41c emits light at about four times the normal intensity. become. Here, since the light emission amount of the light emitting diode is controlled by the current, if the rated applied current of the light emitting diodes 41a, 41b, 41c of each color is CN, the applied current CH to the light emitting diodes 41a, 41b, 41c of each color is ,
CH = CN × (Tf / Tr) (Expression 2)
It becomes. That is, it can be seen that the illumination light quantity of the reciprocal (Tr / Tf) times the operating rate when the light emitting diodes 41a, 41b, 41c are operated continuously can be secured. In this case, it is possible to obtain an image having a brightness close to the brightness obtained when combining and projecting individual images by the light emitting diodes 41a, 41b, and 41c, while being sequential illumination that projects each color in time series. . The light emitting diodes 41a, 41b, and 41c are operated at the rated power or more. However, since the light emission and the extinguishing are repeated in a very short cycle, the light emitting diodes 41a, 41b, and 41c are operated stably. Can be.
[0036]
[Second embodiment]
Hereinafter, a projector according to the second embodiment will be described. Since the projector of the second embodiment is a modification of the first embodiment, only the modified portions will be described.
[0037]
FIG. 6 is a plan view of the optical addressing liquid crystal 20 and its periphery. Scan sensors 71 and 72 for detecting passage of the addressing light AB are disposed at a pair of diagonal positions around the optical addressing liquid crystal 20. The position of one scan sensor 71 corresponds to the scan start position by the addressing light AB, and it is possible to accurately predict the start of the scan based on the output of the scan sensor 71. The position of the other scan sensor 72 corresponds to the scan end position by the addressing light AB, and the scan end can be accurately predicted based on the output of the scan sensor 72.
[0038]
FIG. 7 is a timing chart illustrating the operation of the projector according to the second embodiment. FIG. 7A shows a basic frame signal when operating the writing unit 30 and the illumination unit 40 shown in FIG. 1 and the like, and FIG. 7B shows an output of the scan sensor 71 shown in FIG. FIG. 7C shows the output of the scan sensor 72. FIG. 7D shows the timing of writing by the addressing light, and corresponds to FIG. 4A. 7 (e) to 7 (g) show reading of the color R, FIGS. 7 (h) to 7 (j) show reading of the color G, and FIGS. 7 (k) to 7 (m) show the reading of the color R. B reading is shown.
[0039]
As shown in this case, the output of the scan sensor 71 (see FIG. 7B) may be shifted from the frame signal (see FIG. 7A). Therefore, the timing for modulating the laser light source 31 (see FIG. 7D) uses the output of the scan sensor 71 as a trigger.
[0040]
FIGS. 7E and 7F are signals obtained by using both sensor outputs from both the scan sensors 71 and 72 of FIGS. 7B and 7C as triggers, and the color R light emitting diode 41a is used. The light is input to the driving unit 43 to be driven, and the R light is turned on at the timing of FIG. 7 (g) corresponding to FIG. 4 (b). Similarly, FIGS. 7 (h) and 7 (i) are signals obtained by using both sensor outputs as triggers, and are input to the drive unit 43 for driving the light emitting diode 41b of color G, and correspond to FIG. 4 (c). The G light is turned on at the timing shown in FIG. Similarly, FIGS. 7 (k) and 7 (l) are signals obtained by using both sensor outputs as triggers, input to the drive unit 43 for driving the light emitting diode 41c of color B, and correspond to FIG. 4 (d). Lighting of the B light is performed at the timing of FIG.
[0041]
[Third embodiment]
Hereinafter, a projector according to the third embodiment will be described. The projector according to the third embodiment is a modification of the first embodiment. In this case, a galvano mirror type writing unit 30 using a galvano actuator as the actuator 33 for driving the scan mirror 32 shown in FIG. 1 is provided.
[0042]
FIG. 8 is a timing chart illustrating the operation of the projector according to the third embodiment. Here, FIG. 8A shows a voltage waveform applied to the galvano actuator for sub-scanning, and FIG. 8B shows a signal obtained by binarizing the applied voltage of FIG. FIG. 8C shows a delay signal obtained by performing thinning-out based on the comparator output of FIG. 8B and giving a delay time. This delay signal is generated by the control device 60. Here, the reason why the comparator output is thinned is that if the section in which the positive or negative voltage is switched and applied to the galvano actuator is repeated three times, the display cycle of one screen of RGB (that is, one frame) ends. . The delay time is provided to compensate for a delay in the operation of the galvanomirror, and the delay time is set to an appropriate value in consideration of the inertia of the galvanomirror. FIG. 8D shows a frame start signal generated by using the falling edge of the delay signal in FIG. 8C as a trigger. Based on such a frame start signal, the timing of writing by the addressing light shown in FIG. 8E and the timing of reading for each color of RGB shown in FIGS. 8F to 8H are adjusted.
[0043]
[Fourth embodiment]
Hereinafter, a projector according to the fourth embodiment will be described. The projector according to the fourth embodiment is a modification of the projector according to the first embodiment. In this case, a color hole is used instead of the light emitting diodes 41a, 41b, 41c and the drive unit 43 of FIG.
[0044]
FIG. 9 is a block diagram illustrating a configuration of a lighting unit 140 incorporated in the projector according to the fourth embodiment. The illumination unit 140 includes a white light source 145 such as a lamp that generates illumination light, and a color wheel 146 that emits the light from the white light source 145 as illumination light CL that is color-separated in time series. The color wheel 146 is driven by a motor (not shown) that operates in synchronization with the writing unit 30 and rotates at a constant speed under the control of the control device 60 shown in FIG.
[0045]
FIG. 10 is a plan view illustrating the structure of the color wheel 146. As is clear from the figure, the color wheel 146 has three filter regions 146a, 146b, and 146c corresponding to the three colors of RGB. Between these filter regions 146a, 146b, 146c, three light shielding portions 146d of the same shape formed of a light shielding member such as an ND filter or a reflection mirror are formed. Each light-shielding portion 146d is arranged in an equal angular direction divided into three equal parts from the center.
[0046]
Each part of the color wheel 146 sequentially passes in front of the white light source 145. In the color wheel 146, the filter region 146a corresponds to the timing of reading out the R light in FIG. 4B, the filter region 146b corresponds to the timing of reading out the G light in FIG. 4D corresponds to the timing of reading the G light. The three light-shielding portions 146d realize the illumination OFF when the writing unit 30 illustrated in FIG. 1 writes the RGB colors.
[0047]
Although the present invention has been described with reference to the embodiment, the present invention is not limited to the above embodiment. For example, as the optical addressing liquid crystal 20, a liquid crystal having a photovoltaic layer instead of the photoconductor layer can be used. In addition, a polarization conversion element can be arranged on the emission side of the light source of the reading unit 40, and almost all of the illumination light can be converted into polarized light.
[Brief description of the drawings]
FIG. 1 is a block diagram illustrating a projector according to a first embodiment.
FIG. 2 is a diagram illustrating a cross-sectional structure of an example of an optical addressing liquid crystal.
FIG. 3 is a diagram illustrating a specific scanning of the addressing light.
FIGS. 4A to 4D are timing charts for explaining the operation;
FIGS. 5A to 5D are timing charts of a modified example.
FIG. 6 is a diagram illustrating a part of a projector according to a second embodiment.
FIG. 7 is a timing chart illustrating the operation of the second embodiment.
FIG. 8 is a timing chart illustrating the operation of the third embodiment.
FIG. 9 is a diagram illustrating a part of a projector according to a second embodiment.
FIG. 10 is a plan view illustrating the structure of a color wheel.
[Explanation of symbols]
10 Projector
20 Optical addressing liquid crystal
25 Polarizing filter
30 Writing unit
31 Laser Light Source
32 scan mirror
33 Actuator
35 drive unit
40 Lighting unit
41a-41c each light emitting diode
43 Drive unit
50 Projection lens
60 control device
71,72 scan sensor
145 white light source
146 color wheel
AB addressing light
CLa to CLc Illumination light

Claims (8)

A spatial light modulator in which the optical characteristics change at the point of incidence of the addressing light for writing,
Addressing means for causing the addressing light to be incident on the spatial light modulator, and scanning on the spatial light modulator,
Control means for controlling the timing of writing by the sequential illuminating means and the addressing means, and the timing of reading by the sequential illuminating means, wherein the reading light of each of the color-divided colors is repeatedly and chronologically incident on the spatial light modulator; Projector equipped with. The spatial light modulator has a holding property of holding an image written by the addressing light for a predetermined time, and the control unit controls the sequential light immediately after writing of one screen related to a specific color by the addressing unit ends. 2. The projector according to claim 1, wherein the reading of the specific color by the lighting unit is started. The sequential lighting unit includes a plurality of solid state light emitting devices corresponding to the respective colors, and the control unit controls the timing of reading by adjusting the timing of turning on and off the solid state light emitting devices. The projector according to any one of claims 1 and 2, wherein The control means turns on each solid-state light emitting element with an output obtained by multiplying a normal light output of each solid-state light emitting element by an operation rate reciprocal obtained by dividing a frame time by a lighting time of each color. The projector according to claim 3. 5. The solid-state light-emitting device according to claim 4, wherein the solid-state light-emitting device turns on the solid-state light-emitting device with a current obtained by multiplying the reciprocal of the operation rate by a rated current for continuous driving of the solid-state light-emitting device. Projector. A scan sensor that is arranged at a predetermined position around the spatial light modulator and that detects a scan start and a scan end by the addressing light based on the passage of the addressing light, the control unit includes: The projector according to any one of claims 3 to 5, wherein timing of starting and ending the lighting of each solid state light emitting element is adjusted based on an output of the sensor. The addressing unit includes a light source that generates addressing light, and a scan mirror that deflects the addressing light from the light source, and the control unit starts lighting each solid-state light emitting element based on a drive signal of the scan mirror. The projector according to any one of claims 3 to 5, wherein a timing of the end and an end and an intensity modulation timing of the addressing light are adjusted. The sequential lighting unit includes the white light source and a color wheel, and the control unit includes a light-shielding portion provided on the color wheel, and controls a rotation timing of the color wheel to control a read timing. The projector according to claim 1, wherein:

Images