Source: https://patents.google.com/patent/KR100936836B1/en
Timestamp: 2020-07-13 23:57:47
Document Index: 84356185

Matched Legal Cases: ['art 95', 'art 95', 'art 95', 'art 95', 'art 95', 'art 96', 'art 95', 'art 95']

KR100936836B1 - Projector, projection system, and computer-readable recording medium recorded program - Google Patents
Projector, projection system, and computer-readable recording medium recorded program Download PDF
KR100936836B1
KR100936836B1 KR1020070111470A KR20070111470A KR100936836B1 KR 100936836 B1 KR100936836 B1 KR 100936836B1 KR 1020070111470 A KR1020070111470 A KR 1020070111470A KR 20070111470 A KR20070111470 A KR 20070111470A KR 100936836 B1 KR100936836 B1 KR 100936836B1
KR1020070111470A
KR20080040604A (en
야스나가 미야자와
2006-11-02 Priority to JPJP-P-2006-00298560 priority Critical
2006-11-02 Priority to JP2006298560A priority patent/JP4259567B2/en
2007-11-02 Application filed by 세이코 엡슨 가부시키가이샤 filed Critical 세이코 엡슨 가부시키가이샤
2008-05-08 Publication of KR20080040604A publication Critical patent/KR20080040604A/en
2010-01-14 Publication of KR100936836B1 publication Critical patent/KR100936836B1/en
238000005286 illumination Methods 0.000 claims abstract description 223
A projector having an illumination device for time-dividing a plurality of color lights and a reflection type optical modulation device 6 for forming an optical image in time-division for each color light emitted from the illumination device based on the input image information is inputted. Illumination time control means 95 for dynamically changing and controlling the illumination time for each color light by the illumination device based on the image information analysis means 94 for analyzing the image information and the analysis result of the image information analysis means 94. ).
Projector, projector system, and computer-readable recording medium recording programs {PROJECTOR, PROJECTION SYSTEM, AND COMPUTER-READABLE RECORDING MEDIUM RECORDED PROGRAM}
Conventionally, a projector for forming an optical image by using a reflection type optical modulation device that modulates a light beam emitted from a light source in accordance with image information, and expanding and projecting the optical image has been used. It is known (for example, see Japanese Unexamined Patent Publication No. Hei 9-54267).
The projector using this DMD generally uses one set of DMDs, except for some expensive equipment for digital cinema, and time-divides the illumination light into three colors of RGB light by means of a color wheel. Each color light is imaged by PWM (Pu1se Width Modulation) using DMD.
However, in the projector using such a conventional DMD, the color wheel is always rotated at constant speed even though all colors are not always used in the whole gray scale (typically 256 gray scale) by the projected image such as one frame of the image. According to the color light, there is a problem that the ratio of absorbing the light absorbing plate to the light absorbing plate without projecting the reflected light by the DMD is large, and there is a lot of waste in gray scale expression.
In addition, such time division type driving control has a problem that, when the viewer moves his / her eyes while watching the projected image, the color breakup phenomenon (Co1or Breakup, Rainbow Effect) is visually recognized by the viewer.
The main object of the present invention is to enable projectors, projection systems, programs, and computer readings, which can enable various gradation expressions and color expressions without causing waste in gradation expressions, and can make it difficult for an observer to see the color breakup phenomenon. It is to provide a possible recording medium.
According to an aspect of the present invention, there is provided a projector including: an illumination device that emits a plurality of color lights in time division, a reflection type optical modulation device that forms an optical image in time division for each color light emitted from the illumination device, based on the input image information; A projector comprising a projection optical device for projecting an optical image of each color light formed in a reflective light modulation device, and a control device for controlling the illumination device and the reflective light modulation device, wherein the control device comprises: Image information analysis means for analyzing image information, and illumination time control means for dynamically changing and controlling the illumination time for each color light by said illumination device based on an analysis result of said image information analysis means. do.
As the reflective optical modulation device, in addition to the above-described DMD, LCOS (Liquid Crystal 0n Silicon) having a liquid crystal as a driving element can be adopted.
In addition, in addition to the three primary colors of red (R), green (G), and blue (B), a plurality of color lights may add white (W) to these, and further, cyan (C), magenta (M), and yellow. (Y) may be added.
According to the present invention, the gray scale expression and the color expression can be made colorful by dynamically changing the illumination time of each color light in this way. That is, in the time division type projector, the strength and weakness of the luminance of the image recognized by the observer is determined by the time integration value of the luminance of the light beam emitted from the projection optical apparatus.
Here, since a projector using a conventional color wheel has a configuration in which the color wheel rotates at a constant speed, the intensity of the luminance cannot be controlled only by the projection time of the modulated light beam by the reflective optical modulation device.
On the other hand, in the projector according to the present invention, since the illumination time control means dynamically changes the illumination time for each color light by the illumination device, the intensity of the luminance is caused by the projection time of the modulated light beam by the reflective optical modulation device. In addition to the control, it is possible to dynamically control the illumination time of the color light emitted from the illumination device, and by combining them, it is possible to realize various gradation expressions and color expressions than before.
In addition, by dynamically changing the illumination time of the illumination device in this way, in the state where the reflective optical modulator is absorbing light in the absorber, the amount of illumination of the illumination by the illumination device is decreased depending on the time of absorption. Since it can shut down, waste in gray scale expression can also be reduced.
In addition, dynamically changing the illumination time can shorten the time for absorbing light into the absorbing plate by the reflective optical modulation device as in the conventional time-division type projector, so that the frame rate of the normal time-division is With a short illumination, it may be difficult for an observer to see the color breakup phenomenon.
In the present invention, the illumination device is provided at the rear end of the optical path of the white light source and the optical path of the white light source, divided into a transmissive color region according to the plurality of color lights, and rotates the color light emitted by the rotation. When equipped with a color wheel and rotation drive means which rotates the said color wheel, as said illumination time control means, the illumination light quantity calculation part which calculates the illumination light quantity of each color light based on the analysis result of the said image information analysis means. And a rotation drive control unit for outputting a control command to the rotation drive means in accordance with the calculated amount of illumination light of each color light to perform rotation control of the color wheel.
According to the present invention, it is possible to control the lighting time of each color light dynamically by simply embedding software called rotation control means in a time-division type projector using a conventional color wheel system. The present invention can be realized.
In the present invention, the illuminating device includes a white light source for emitting white light, a color wheel provided at a rear end of the optical path of the white light, divided into regions according to the plurality of color lights, and switching color light emitted by rotating; And a rotation drive means for rotating the color wheel and a rotation axis drive means for moving the rotation axis of the color wheel from a plane orthogonal to the optical path of the white light source. It is comprised so that the ratio of the transmissive color area | region of each color light in the ring-shaped strip | belt-shaped body along the circumference direction centering on a center may change according to the radial position toward the outer peripheral part of the said color wheel from the said rotation center, As said illumination time control means, the illumination light quantity of each color light is calculated based on the analysis result of the said image information analysis means. The illumination light quantity calculation part and the rotation shaft position control part which output a control command to the said rotation drive means according to the calculated illumination light quantity of each color light, and control the rotation axis position of the said color wheel can be employ | adopted.
Here, in order to change the ratio of the transmission color area | region of each color light in the ring-shaped strip | belt of a color wheel according to a radial position, the boundary part along the radial direction between other transmission color area | regions is radial direction, for example. By changing according to the position or rotating the color wheel, it can be realized by shifting the circular locus of the transmitted light beam projected onto the color wheel and the rotation center of the color wheel.
According to the present invention, since the position of the rotation axis of the color wheel is shifted by the rotation axis position control unit, the white light source can be transmitted through the portion of the ring-shaped band according to the deviation of the rotation axis position. Color light can be switched in a ring-shaped band having a different ratio of transmissive color regions, and the illumination time of each color light can be changed dynamically.
In the present invention, when the illumination device includes a light source driving means for driving the white light source, the illumination time control means includes the light source driving means in accordance with the amount of illumination light of each color light calculated by the illumination light amount calculating unit. The control command can be output to the control source, and the structure provided with the light source drive control part which adjusts the light quantity of the said white light source can be employ | adopted.
According to the present invention, in addition to dynamically changing the illumination time of each color light by the illumination device, since the amount of light of the white light source itself is adjusted, the light absorption ratio can be improved on the projected image. Since the amount of light of color light absorbed by the plate is also reduced, it is more preferable.
In this invention, in order that the said illumination device adjusts the light quantity of the light emitted from the said white light source, the dimming member which freely advances and retreats on the optical path of the light beam emitted from the said white light source, and this dimming member are driven. When the dimming means having dimming driving means is provided, the illumination time control means outputs a control command to the dimming driving means in accordance with the amount of illumination light of each color light calculated by the illumination light quantity calculating unit, to the dimming means. The structure provided with the light control part which adjusts the light quantity by this can be employ | adopted.
According to the present invention, the contrast of the projected image can be improved as described above, and the amount of light can be adjusted only by driving the dimming material with the dimming driving means, as compared with the case of adjusting the amount of light of the white light source. Light quantity adjustment can be made excellent in responsiveness.
In the present invention, when the lighting device includes a plurality of solid state light source elements provided in accordance with a plurality of color lights and light source element driving means for driving each solid state light source element, the illumination time control means includes the image information analysis. On the basis of the analysis result of the means, an illumination light amount calculation unit that calculates an illumination light amount of each color light and outputs a control command to the light source element driving means in accordance with the illumination light amount of each color light calculated by the illumination light amount calculation unit, The structure provided with the light source element drive control part which adjusts the light quantity of the solid-state light source element according to color light can be employ | adopted.
Here, as a solid light source element, LED (Light Emitting Diode), LD (Laser Diode), etc. can be employ | adopted.
According to the present invention, it is possible to illuminate time-division simply by performing the lighting / lighting control of the solid state light source element according to each color light without using the color wheel as in the related art, and also controlling the light source element driving means of the solid state light source element. Thus, the amount of light emitted from the solid state light source element corresponding to each color light can also be changed, since the illumination time by the solid state light source element corresponding to each color light can be changed dynamically. In addition, since the responsiveness of turning on / off the solid-state light source element is good, the present invention can be suitably employed.
The present invention can also be configured as a projection system in which a projector and an information processing apparatus are connected through a transmission means.
Specifically, the projection system according to the present invention is an illumination device for emitting a plurality of color light in time division, a reflection type optical modulation device for forming an optical image by time division for each color light emitted from the illumination device based on the input image information And a projector having a projection optical device for projecting an optical image of each color light formed by the reflective optical modulation device, and an information processing device connected to the projector via a transmission means and outputting image information to the projector. As the projection system, the information processing apparatus dynamically adjusts illumination time for each color light by the illumination device based on image information analyzing means for analyzing image information output to the projector and an analysis result of the image information analyzing means. Illumination time control means for changing and controlling the illumination time control means And a data transmission means for transmitting the illumination time control command by the transmission means to the projector via the transmission means.
By the invention according to such a projection system, the same effects and effects as described above can be enjoyed.
In the present invention, the illumination device includes a plurality of solid state light source elements provided in accordance with a plurality of color lights, and light source driving means for driving each solid state light source element, and the illumination time control means is an analysis of the image information analysis means. On the basis of the result, an illumination light amount calculation unit for calculating the illumination light amount of each color light and outputting a control command to the light source driving means in accordance with the illumination light amount of each color light calculated by the illumination light amount calculation unit, according to each color light The structure provided with the light source drive control part which adjusts the light quantity of a solid-state light source element can be employ | adopted.
According to the present invention, the same effects and effects as described above can be enjoyed.
The present invention can also be configured with a program executed on the information processing apparatus constituting the projection system described above and a computer-readable recording medium recording the program.
Specifically, the program according to the present invention is a lighting device for emitting a plurality of color light by time division, a reflective optical modulation device for forming an optical image for each color light emitted from the lighting device, based on the image information input, the reflective light A program executed on an information processing device for outputting image information to a projector having a projection optical device for projecting an optical image of each color light formed by a modulation device, the program being configured to interpret the image information output to the projector. It functions as an illumination time control means for dynamically changing and controlling the illumination time for every color light by the said illumination device based on the image information analysis means and the analysis result of the said image information analysis means.
The computer-readable recording medium according to the present invention is characterized by recording the above program.
According to the present invention, the present invention can be carried out only by performing installation or the like with a general-purpose computer on the same effects and effects as described above.
According to the present invention, a projector, a projection system, a program, and a computer-readable recording medium capable of enabling various gradation expressions and color expressions without causing waste to the gradation representation, and for which an observer cannot visually recognize the color breakup phenomenon. Can be provided.
1 shows an optical system of a projector 1 according to Embodiment 1 of the present invention, which forms an optical image based on image information from a personal computer or an AV (Audio-Visual) device. Is an optical device that enlarges and projects this optical image onto the screen Sc. In this embodiment, a digital micromirror device (DMD) is employed as the optical modulation device for forming the optical image in accordance with the input image information.
Specifically, the projector 1 includes a light source device 2, a load integrator 3, a color light conversion device 4, a light guide system 5, a DMD 6 as an optical modulation device, and light absorption. The board 7 and the projection optical apparatus 8 as a projection optical apparatus are comprised. In addition, in the present embodiment, the light source device 2, the rod integrator 3, the color light conversion device 4, and the light guide system 5 function as an illumination device that emits a plurality of color lights in time division.
The light source device 2 consists of a light-emitting body which emits white light or monochromatic light, and is discharged from a light source lamp 21 of discharge light emitting type such as a halogen lamp, a metal halide lamp, a high pressure mercury lamp, and a light source lamp 21. A parabolic reflector 22 which emits the emitted light beam in accordance with the illumination optical axis, and at its rear end, a condensing lens 23 for forming the light beam emitted from the parabolic reflector 22 in the rod integrator 3; The mirror 24 which bends the light beam emitted from the parabolic reflector 22 by about 90 degrees is provided.
The rod integrator 3 is made of a columnar translucent material having a substantially rectangular cross section, and internally reflects the light beam from the light source device 2. For this reason, the luminance unevenness in the image which the image of the light-emitting body of the light source device 2 has is reduced, and the luminous flux with uniform illuminance distribution is produced. This rod integrator 3 forms a light source surface for illuminating the image forming region of the DMD 6 in the vicinity of the ejection cross section.
The color light conversion device 4 converts the light beam emitted from the rod integrator 3 into wavelength regions of red (R), green (G), and blue (B), and time-divisions a plurality of color lights in the DMD (6). To supply.
Specifically, this color light switching device 4 includes a color wheel 41 and a stepping motor 42.
As shown in Fig. 2A, the color wheel 41 is provided with color filters (transmissive color regions) 41R, 41G, and 41B of three colors of RGB, and the respective color filters 41R, 41G, and 41B rotate. It is formed in a fan shape with a center angle of 120 degrees around the center O, and is divided into three within the color wheel 41. In addition, when timing of switching color light by time division is made faster, each color filter 41R, 41G, 41B is formed in the fan shape of 60 degree center angle like the color wheel 43 shown in FIG. The inside of the color wheel 43 may be divided into six locations.
The stepping motor 42 is rotation drive means for which a rotating shaft rotates by applying a drive pulse, and the rotating shaft is connected to the rotation center O of the color wheel 41.
As shown in FIG. 1, the rotation axis of the color light switching device 4 is disposed at a position offset to the outside from the illumination axis of the light beam emitted from the rod integrator 3, and the driving pulse is applied to the stepping motor 42. When the color wheel 41 is rotated to give the rotation, the luminous flux emitted from the rod integrator 3 passes through the curly filters 41R, 41G, and 41B in time division, thereby emitting RGB color light in time division. It becomes possible.
The light guide system 5 has a function of guiding the light beam emitted from the color light conversion device 4 to the image forming region of the DMD 6, and is used as the first relay lens 51 and the second relay lens 52. It is composed.
The first relay lens 51 converges and diverges the luminous flux emitted from the color wheel 41 to enlarge the transmission width of the light. The second relay lens 52 converges the divergent light passing through the first relay lens 51 to be parallel light, and illuminates the image forming area of the DMD 6.
In addition, the above-described color light conversion device 4 and the light guide 5 have an image forming relationship in which the exit end face of the rod integrator 3 and the image forming area of the DMD 6 are conjugated in order to improve the lighting efficiency. Arranged to satisfy.
The DMD 6 selects the reflection direction of the incident light beam by changing the inclination of the micromirror, and adds two-dimensional modulation based on image information to the incident light beam. The incident light beam then becomes modulated light corresponding to the projected pixel.
For example, the DMD 6 is configured by integrating a plurality of movable micromirrors on a semiconductor chip by micromachine technology based on a CMOS wafer process.
Although not shown, this movable micromirror rotates about a diagonal axis and takes the bistable state inclined at two predetermined angles ((theta)). A large optical deflection angle of 4θ can be obtained between these two states, and the light switching with a good S / N ratio can be achieved, and by switching the rotation direction to a constant reflection time, a predetermined amount of projection light is reflected to the projection optical device. It can be put in (8).
The light beam reflected and deflected in the + 2θ direction among the light beams incident on the DMD 6 is projected by the projection optical device 8 as image light, and the light beam reflected and deflected in the −2θ direction is unnecessary light. It is absorbed by the light absorbing plate 7.
The light absorbing plate 7 is, for example, textured on its surface and coated with a multilayer antireflection film. By such a surface, reflection of the incident light beam can be prevented by the microscopic shape effect and the interference principle.
The projection optical device 8 enlarges and projects the image light modulated by the DMD 6 on the screen Sc. This projection optical device 8 is composed of an optical path changing prism 81 and a projection lens 82.
The prism 81 is inclined with respect to the light beam emitted from the DMD 6, and is comprised with the optical film 83 and the mirror 84 which reflect or transmit light according to an incident angle.
Since the light beam emitted from the DMD 6 has a large incidence angle, it is reflected by the optical film 83 and reflected by the mirror 84 again, so that the incidence angle becomes small and passes through the optical film 83.
The projection lens 82 is configured as a coarse lens in which a plurality of condensing elements are arranged along the optical axis direction for the purpose of preventing the projection image due to chromatic aberration or the like in each color light of RGB not being clear.
[2] Configuration of Control Device 9
3, the control apparatus 9 which controls the drive system of the projector 1 mentioned above is displayed, and this control apparatus 9 drives the DMD which drives the DMD 6 based on the input image information VIDEO. With respect to the light source driving circuit 25 for driving the circuit 61, the motor driving circuit 44 for driving the stepping motor 42 of the color light switching device 4, and the light source lamp 21 of the light source device 2, It generates and outputs a control command to drive control of the DMD 6, the stepping motor 42, and the light source lamp 21.
This control device 9 comprises an image information input means 91, an image processing means 92, a DMD drive control means 93, an image information analysis means 94, and an illumination time control means 95. The image processing means 92, the image information analyzing means 94, and the illumination time control means 95 are configured as a program executed on the calculation region of the control device 9.
The image information input means 91 converts image information input from a personal computer, an AV device, or the like into RGB image information and outputs the image information to the image processing means 92 and the image information analyzing means 94.
The image information input means 91 receives image information through a digital transmission terminal such as a DVI (Digital Visual Interface) terminal, a USB (Universal Serial Bus) terminal, and an analog transmission terminal such as a D-Sub terminal. The digital image information input through the terminal is subjected to decoding processing according to each standard, and the analog image information input through the analog transmission terminal is converted into digital data.
The image processing means 92 is a part which can perform image processing on the image information output from the image information input means 91 so that an appropriate image display can be performed in the DMD 6, and as image processing, IP (Interlace Progressive) ) Conversion processing, resolution conversion processing, color conversion processing, gamma correction processing, and the like. In addition, although not shown in figure, this image processing means 92 is provided with a frame buffer, and the input image information is accumulate | stored in this frame buffer by frame unit, and performs image processing by frame unit.
The DMD drive control means 93 is a portion for generating a drive control signal for driving the DMD 6 in time division according to each color light of RGB on the basis of the image information subjected to the image processing in the image processing means 92. The generated drive control signal is output to the DMD drive circuit 61.
Since the drive control signal generated by this DMD drive control means 93 needs to be synchronized with the rotation control of the color wheel 41 of the color light switching device 4, the lighting time control means 95 will be described later in detail. Control information regarding the lighting time from the control panel is also added.
The image information analyzing means 94 is a part for analyzing the image information of RGB output from the image information input means 91, and although not shown, is provided with a plurality of frame buffers for storing image information in units of frames, Image information in frame units obtained from a plurality of frame buffers is analyzed.
Specifically, as shown in Fig. 4, the image information analyzing means 94 acquires a change in the grayscale value (0 to 255 gradations) of each color light of RGB in each pixel of each frame in the image information. Interpret As can be seen from Fig. 4, in input image information such as a moving image, the gradation value of the image formed for all the color lights varies greatly, and all of them are used at full scale (e.g., 255 gradations in Fig. 4). Work is rare.
Therefore, the image information analyzing means 94 expands the image information of the plurality of frames among the input image information into the respective frame buffers, obtains the grayscale values of the respective RGB color lights in each frame, and It is interpreted in what form it is good to illuminate the DMD 6.
Incidentally, the analysis by the image information analyzing means 94 is actually performed by the number of the frame buffers before the frame of the image information forming the optical image in the DMD 6, and the modulation image of the DMD 6 and the illumination time control means. Synchronization of the lighting time control by 95 is taken.
The illumination time control means 95 performs drive control of the stepping motor 42 and the light source lamp 21 described above on the basis of the analysis result by the image information analysis means 94 to dynamically change the illumination time. It is comprised by the illumination light quantity calculation part 95A, the rotation drive control part 95B, and the light source drive control part 95C.
The illumination light quantity calculation part 95A is a part which calculates illumination light quantity from the analysis result of the image information analysis means 94. FIG. As described above, in the projector 1 of the time division format, the observer recognizes the gray scale value of the projected image as the time integral value of the luminance value of each color light of RGB.
Therefore, although described later in detail, the illumination light amount calculation unit 95A calculates the illumination light amount from the gradation value in each frame of the image information, and based on this, the illumination time of the DMD 6 by each color light of the RCB. And the light amount of the white light emitted from the light source lamp 21 is calculated.
For example, in FIG. 4, when the observer wants to recognize the gradation value 150 of the G light at the frame number of about 80, the luminance of the white light of the light source lamp 21 may be increased to shorten the illumination time by the G light. The luminance of the white light of the light source lamp 21 may be lowered to increase the illumination time by the G light. In addition, the illumination time calculated by this illumination light quantity calculation part 95A is output to the rotation drive control part 96B and DMD drive control means 93. FIG.
The rotation drive control unit 95B generates a control command for changing the rotation of the stepping motor 42 based on the illumination time of each color RGB light calculated by the illumination light amount calculation unit 95A, and the motor drive circuit 44 Will output Specifically, the rotation drive control unit 95B outputs a control command for changing the drive pulse per unit time to the motor drive circuit 44, and increases the drive pulse per unit time if the rotation speed is to be increased. If you want to slow down the rotation speed, output a control command that reduces the drive pulse per unit time.
The light source driving control unit 95C outputs a control command to the light source driving circuit 25 based on the light amount of the white light emitted from the light source lamp 21 calculated from the illumination light quantity calculating unit 95A, and then the light source lamp 21 The amount of light emitted from the light source is changed. Specifically, the light amount of the light source lamp 21 is changed by controlling the voltage applied to the light source lamp 21.
[3] Actions and effects of the projector 1
Next, the operation of the above-described projector 1 will be described based on the flowchart shown in FIG. 5.
First, when image information is input, for example, from a digital transmission terminal, the image information input means 91 performs decoding processing according to a predetermined standard (process S1), and inputs the input image information into the image processing means 92 and the image. The information is output to the information analyzing means 94.
The image information analysis means 94 acquires and analyzes the change of the gray value of each color light of RGB in each pixel of the preceding several frame among the input image information (process S2).
The illumination light amount calculation unit 95A of the illumination time control unit 95 first calculates the light amount of the light source lamp 21 in each frame based on the analysis result of the image information analysis unit 94 ( Processing S3) then calculates the illumination time of each color light of RGB in each frame (process S4), and the calculation of the light quantity and illumination time is completed for all the frames in the frame buffer of the image information analyzing means 94. Repeat until (process S5).
When the illumination light quantity calculation unit 95 finishes the calculation of the illumination time and the light quantity calculation for all the frames in the frame buffer of the image information analyzing means 94, the illumination light quantity calculation unit 95A calculates the calculated light source lamp 21. ) Is output to the light source drive control part 95C, and the illumination time of each color light of RGB in each calculated frame is output to DMD drive control means 93 and rotation drive control part 95B (process S6). ).
The image processing means 92 performs image processing sequentially from the frame in which the calculation of each output value is finished in the illumination light amount calculation unit 95A (process S7), and sends the image information subjected to the image processing to the DMD drive control means 93. The DMD drive control means 93 generates a control command for driving the DMD 6 based on the image information and the illumination time of each color light of RGB from the illumination light quantity calculation unit 95A, and the DMD It outputs to the drive circuit 61, and controls the drive of the DMD 6 (process S8).
At the same time, the rotation drive control unit 95B generates a control command based on the illumination time of each color light of RGB, outputs it to the motor drive circuit 44, and controls the rotation of the stepping motor 42 (process S9). .
The light source drive control unit 95C generates a control command based on the calculated light source light amount, outputs it to the light source drive circuit 25, and controls the light amount of the light source lamp 21 (process S10).
By these controls, the image formed according to each color light of RGB from the projection optical device 8 is projected and displayed by time division (process S11), whereby the viewer recognizes the projection image as a color image.
Subsequently, the process returns to the beginning and repeats the analysis of the image information to be input next.
6A to 8B show how the projector 1 as described above can suppress waste of gradation expressions and reduce waste of various gradation expressions, color expressions, and gradation expressions. It demonstrates based on. In addition, in each figure, although the dynamic change of illumination time is demonstrated with reference to four pixels for convenience of description, you should consider about all the pixels in the image forming area contained in DMD6 actually. .
6 (a) to 8 (b), the horizontal axis represents time t, and the length of the horizontal bars in each of the pixels 1 to 4 is the color light and the modulation time by the DMD 6 in the pixel. The heights K1 and K2 in the longitudinal direction of the illumination light amount indicate the light amounts of the light beams emitted from the light source device 2.
First, in Fig. 6 (a), Fig. 7 (a), and Fig. 8 (a), time-division display in a conventional DMD format projector is displayed. At this time, in the dividing display, the color wheel rotates at a constant speed. In this configuration, the illumination time of the DMD by each color filter formed in the color wheel is constant, and the gray scale display of each color light RGB is constrained by the uniform illumination time.
Therefore, even if the gradation display for any color light, for example, the color light R, is finished by the DMD, the next color light G cannot perform gradation display by the DMD unless the illumination time by the color filter is finished.
For this reason, when the gradation display is changed from the color light R to the color light G, a blank period occurs, and all the unnecessary light is absorbed by the light absorbing plate.
In contrast, in the projector 1 according to the present embodiment, as shown in FIG. 6B, the illumination time control means 95 determines the illumination time of each color light RGB that has passed through the color filters 41R, 41G, and 41B. By dynamically changing by the above, the illumination time can be synchronized to the pixel having the highest gray scale value, that is, the long modulation time by the DMD 6, among the pixels 1 to 4 of the DMD 6.
As a result, the blank period after the modulation in each color light RGB can be eliminated as before, and the waste of gradation expression can be suppressed by reducing the light quantity of the light absorbed by the light absorption plate 7.
In addition, by eliminating the blank period, time division display of each color light RGB can be performed continuously, so that the switching rate of illumination switching for each color light of RGB can be increased, and the observer observing the projected image shifts the gaze. Even if it does so, it may be difficult to recognize the color breakup phenomenon.
In addition, when comparing Fig. 6 (a) and Fig. 6 (b), since the RGB can be illuminated twice as many times as the time required for image display of one frame, the amount of illumination light per unit time of the light source lamp in the prior art With respect to K1, even if the illumination light quantity K2 per unit time of the light source lamp 21 in this embodiment is approximately half, illumination is performed twice within one frame, so that there is no difference in the integral value by the time value t. The amount of illumination light of the light source lamp 21 can be halved.
That is, since the light amount of the light source lamp 21 can be made small, the power consumption of the projector can be reduced.
Next, as shown in Fig. 7 (b), in this embodiment, compared with the conventional one shown in Fig. 7 (a), the color light R and the color light G are illuminated by twice the number of times of illumination during the same time t. However, about the color light B, when it is made into the same number of illuminations as before, the illumination light amount of the light source lamp 21 in color light R and color light G may be about half illumination light quantity K2, and the light source in color light B Only when it is the lamp 21, it is good to say the illumination light quantity K1 equivalent to the conventional one.
In other words, by varying the illumination time of each color light of RGB in this manner, various gradation expressions and color expressions can be realized.
In addition, as shown in Fig. 8B, in this embodiment, even if the number of illuminations is the same, the illumination time t of each color light RGB can be approximately half of the illumination time t in Fig. 8A. Even if a black image is inserted after one frame display by time division of each color light of RGB, it is possible to shift to the next frame display at the same time as in the prior art.
As a result, by displaying the image of each frame for a short time and inserting a black image, it is possible to prevent a beauty phenomenon or the like during frame update in the projected image, thereby improving the viewer's moving image visibility. have.
When the black image is inserted, when the light source lamp 21 is exposed, light emitted from the light source lamp 21 and absorbed by the light absorbing plate 7 can be reduced, so that unnecessary light can be reduced. .
As described above, according to the present embodiment, various gradation expressions and color expressions can be performed without causing waste to the gradation expression, and the color breakup phenomenon can be made difficult for the observer to visually recognize.
Next, Example 2 of the present invention will be described. In addition, in the following description, about the part same as the already demonstrated part, the same code | symbol is attached | subjected, and the description is abbreviate | omitted.
In Embodiment 1 mentioned above, the dynamic change of the illumination time of each color light of RGB by illumination time control means 95 is rotation of the stepping motor 42 which rotationally drives the color wheel 41 of the color light conversion apparatus 4. This is achieved by controlling the speed.
In addition, in Embodiment 1 mentioned above, the light quantity adjustment of the light source emitted from the light source lamp 21 is implement | achieved by controlling the light source drive circuit 25. As shown in FIG.
In contrast, in the projector 1A according to the second embodiment, as shown in FIG. 9, in the color light conversion device 4A, the color filter of the color wheel 141 is changed, and the rotation axis of the color wheel 141 is It is different in that the illumination time of each color light of RGB is changed dynamically by moving so that it may approach | separate and space | deviate with respect to the illumination optical axis of the light beam radiate | emitted from the rod integrator 3. As shown in FIG.
In the projector 1A according to the second embodiment, the light control device 10 is provided at the rear end of the light source device 2, and the light control device 10 is controlled to control the light flux emitted from the light source device 2. The point of adjusting the amount of light is different.
Hereinafter, these differences are explained in full detail.
[1] configuration of the color light switching device 4A
As shown in FIG. 9, the color light switching device 4A of the projector 1A according to the present embodiment includes a color wheel 141, a stepping motor 142, and an actuator 143.
As shown in Fig. 10A, the color wheel 141 is partitioned by RGB tricolor color filters 141R, 141G, and 141B, and adjacent color filters, for example, color filters 141R adjacent to each other. The boundary portion of the color filter 141B protrudes toward the color filter 141R according to the radial position with respect to the line L which gives the radius from the rotation center O of the color wheel 141 toward the outer peripheral end thereof, or the color filter ( 141B). The same applies to the boundary portion between the color filter 141B and the color filter 141G.
In other words, the color wheel 141 according to the present embodiment has an illumination time due to the color light R when it is rolled in comparison with the two ring-shaped bands W1 and W2 having different radial positions. The illumination time by the color light G and the illumination time by the color light B are changed.
In addition, the color wheel which can be employ | adopted in this embodiment is not limited to this, As shown in FIG.10 (b), it is like the boundary part of the adjacent color filter 144R and the color filter 144B. The color wheel 144 divided by a curve may be employed.
Returning to FIG. 9, the stepping motor 142 can be driven by the drive pulses as in the case of the first embodiment described above, and the rotation speed can be changed by the increase or decrease of the number of drive pulses. It rotates at constant speed similarly to the conventional case.
The actuator 143 functions as a rotation shaft drive means for approaching and separating the rotation axis position of the color wheel 141 with respect to the illumination optical axis of the light beam emitted from the rod integrator 3, and can be positioned at a high speed. Known linear actuators, actuators using piezoelectric elements, and the like can be employed.
In such a color light switching device 4A, when the rotation axis of the color wheel 141 is approached and spaced apart from the illumination optical axis of the light beam emitted from the rod integrator 3 by the actuator 143, the rod integra The position through which the light beam emitted from the radar 3 passes through the color wheel 141 moves to the rotation center direction or the outer peripheral end of the color wheel 141.
As described above, in the color filters 141R, 141G, and 141B of the color wheel 141, the ratio of the RGB region in the ring-shaped band is radial in the same direction as the bands W1 and W2. Since the position varies depending on the position, when the light beam transmission position moves, the position of the strip-shaped body functioning as the color wheel changes, whereby the illumination time of each color light of RGB can be changed dynamically.
In addition, the color light switching device which can move the rotation axis position is not limited to the above-mentioned color light switching device 4A.
For example, as shown in FIG. 11, illumination of each color light of RGB is also performed by the color light switching device 4B provided with the color wheel 145 and the frame body 146 which rotatably holds this color wheel 145. FIG. You can change the time dynamically.
That is, the color wheel 145 is formed with the color filters 145R, 145G, and 145B divided into equal parts, and the gear 145A is formed in the outer periphery.
On the other hand, an opening larger than the outer diameter of the color wheel 145 is formed in the frame 146, and a gear 146A is formed in the opening edge thereof.
When the center O of the color wheel 145 is rotated by a stepping motor or the like with the gear 145A and the gear 146A engaged, the color wheel 145 is framed in an eccentric state with respect to the center of the opening of the frame 146. The inside of the opening of the sieve 146 rolls.
On the other hand, the circular locus (that is, ring-shaped band) W3 projected by the color wheel 145 rotating by the light beam emitted from the rod integrator 3 is the frame body 146. Coincides with the center of the opening.
Thereby, since the rotational position of the circular trace W3 and the color wheel 145 is eccentric, illumination time of each RGB color light can be made different.
Moreover, when the frame body 146 is moved horizontally with respect to the light beam emitted from the rod integrator 3, the center of the opening of the frame body 146 will shift | deviate from the strip | belt-shaped body W3. Therefore, it becomes possible to change the ratio of the area | region of the color filter 145R, 145G, 145B in strip | belt-shaped body W3.
[2] configuration of lighting control device 10
As shown in FIG. 9, the light dimming apparatus 10 includes a pair of light blocking plates 11 serving as light control materials in which one end 11A is axially supported so that rotation is free, and these light blocking plates 11 have a dimming amount of zero. In the developed state, they are disposed opposite to each other on the outside of the light beam emitted from the light source device 2.
In the case of starting dimming control to reduce the light flux emitted from the dimming device 10, the pair of light blocking plates 11 are rotated in a direction approaching each other, and the gap between the pair of light blocking plates 11 is changed according to the amount of rotation. This adjustment is performed and light control is possible.
In addition, although the illustration of the light control apparatus 10 is abbreviate | omitted in FIG. 9, it has a stepping motor and the conduction mechanism which induces the rotation of this stepping motor to the rotating shaft of each light shielding plate 11, and rotates a stepping motor , The gap between the pair of light shielding plates 11 is adjusted.
Of course, the dimming apparatus which can be employ | adopted in this embodiment is not limited to this, You may employ | adopt various dimming apparatuses of a well-known structure.
[3] Structure of Control Device 9A
As described above, the projector 1A is controlled by the control device 9A, as shown in FIG. 12, and the control device 9A has an illumination time compared with the control device 9 according to the first embodiment described above. The control means 195 are different in construction.
The illumination time control means 195 includes an illumination light amount calculation unit 95A, a rotation axis position control unit 195B, and a dimming control unit 195C.
In the same manner as in the first embodiment described above, the illumination light amount calculation unit 95A uses the illumination time of each color light of the optimal RGB from the light source device 2 based on the analysis result from the image information analyzing means 94. It is the same as that of Example 1 mentioned above in that it calculates the light quantity of the emitted light beam.
On the other hand, the rotation axis position control unit 195B has a ring shape in the color wheel 141 as shown in Fig. 10A based on the illumination time of each color light of RGB calculated by the illumination light amount calculation unit 95A. At which position, such as the strip-shaped bodies W1 and W2, the light beam emitted from the rod integrator 3 should be illuminated, and a control command for positioning the rotating shaft of the color wheel 141 is generated, and the actuator is generated. Output to the rotation shaft drive circuit 143A of 143. FIG. This positioning control drives the actuator 143 over a plurality of frames when the responsiveness of the actuator 143 is worse than the frame rate of the image information.
The dimming control unit 195C is a part which performs dimming control of the dimming device 10 based on the light source light amount calculated by the illumination light amount calculating unit 95A, and generates a control command according to the calculated light source light amount, The amount of light source light outputted to the dimming drive circuit 13 of the stepping motor 12 constituting the dimming device 10, by adjusting the amount of poles between the pair of light blocking plates 11 of the dimming device 10. Control according to the above.
Since the illumination time control of each color light of RGB by the above-mentioned control apparatus 9A and the dimming control by the dimming apparatus 10 are the same as the case of Example 1 mentioned above except for the control object, it is the description Omit.
In Example 1 mentioned above, the light source device 2 provided with the discharge light-emitting light source lamp 21 is employ | adopted, and the color light conversion device 4 provided with the color wheel 41 switches each color light of RGB. It is done by.
In contrast, in the present embodiment, as shown in FIG. 13, in the projector 1B according to the present embodiment, the light source device 15 includes three color LEDs 151R, 151G, and 151B, and each LED 151R. , 151G and 151B are switched on and off, and the point of illuminating each color light of RGB by time division differs.
In addition, in this embodiment, as shown in FIG. 14, image information and illumination control processed by the computer 1C, which are configured as a projection system in which the projector 1B and the computer 1C are connected by a cable 1D. The information is transmitted to the projector 1B via the cable 1D, and based on this, the display of the projected image in the projector 1B is different.
[1] configuration of the light source device 15
As shown in FIG. 13, the light source device 15 of the projector 1B includes the LEDs 151R, 151G, and 151B and a cross dichroic prism 152.
The LEDs 151R, 151G, and 151B are planar light emitters formed by arranging a plurality of solid state light source elements in a rectangular plate shape, wherein the LED 151R emits red light, the LED 151G emits green light, and the LED 151B emits blue light. do. Each solid light source element utilizes the photoelectric conversion effect of the semiconductor to emit light of a predetermined wavelength when a voltage is applied.
In addition, although LED is used as a solid-state light source element in this embodiment, it is not limited to this, You may employ | adopt planar LD (Laser Diode), and LED which consists of one solid-state light source element instead of planar light-emitting body. May be employed.
The cross dichroic prism 152 has a substantially square shape in view of a plane in which four rectangular prisms are bonded to each other, and two dielectric multilayer films are formed at the interface where the rectangular prisms are bonded to each other.
Of the two dielectric multilayer films, one dielectric multilayer film reflects the wavelength of the red region, transmits the wavelength of the green region, and the other dielectric multilayer film reflects the wavelength of the blue region, and transmits the wavelength of the green region. have.
Then, the LEDs 151G are disposed to face the side of the cross dichroic prism 152 at a position corresponding to the illumination optical axis of the light source device 15 in front, and the other LEDs 151R, 151B are cross-diverse. By arrange | positioning on the other adjacent side surface of the prism 152, each color light of RGB emitted from LED 151R, LED 151G, and LED 151B will be emitted along the same illumination optical axis.
[2] configuration of the projection system
The projection system according to the present embodiment has a configuration in which the projector 1B described above and the computer 1C as the information processing apparatus are connected by the cable 1D.
The cable 1D is composed of a cable capable of bidirectional communication in a digital format, and for example, a cable conforming to a standard such as USB 2.0 can be adopted.
The computer 1C comprises an image information generating means 191, an image processing means 92, an image information analyzing means 94, an illumination time control means 295, and a data transmitting and receiving means 192, and each functional The means is configured as a program executed on the arithmetic processing unit of the computer 1C.
The image information generating means 191 is a portion for generating image information processed by the image processing means 92. The generation of image information is, for example, a file compressed in a format such as MPEG2 recorded on a hard disk (not shown). Decoded and executed, the decoded image information is output to the image processing means 92 and the image information analyzing means 94.
The image processing means 92 is for forming an appropriate image in the DMD 6 constituting the projector 1B, and is the same as the image processing means 92 according to the first embodiment described above, but the image processed image information is data. It is output to the transmission / reception means 192.
The image information analyzing means 94 analyzes the image information generated by the image information generating means 191, but similarly to the first embodiment described above, the analysis is performed prior to the frame of the image information processed by the image processing means 92. Do it.
In this embodiment, the illumination time control means 295 includes only the illumination light amount calculation unit 95A.
The illumination light amount calculation unit 95A is the same as the illumination light amount calculation unit 95A according to the first embodiment described above, but the control information regarding the illumination time and the light source light amount of each color light of the RGB is output to the data transmission / reception means 192. do.
The data transmitting / receiving means 192 stores the image information processed by the image processing means 92 described above, and control information about the illumination time and the light source light quantity calculated by the illumination light quantity calculation unit 95A, and the cable 1D. It is a part to be transmitted to the projector 1B via the transmission, and data transmission is performed by encoding in accordance with a communication standard.
The control device 9B of the projector 1B is provided with a data transmission / reception means 193 and a light source element drive control means 194 in addition to the DMD drive control means 93 similar to the first embodiment described above.
The data transmitting / receiving means 193 is transmitted from the computer 1C, and decoded and processed by the DMD drive control means 93 and the light source element drive control means 194. do.
The DMD drive control means 93 performs drive control of the DMD drive circuit 61 on the basis of the control information and the image information relating to the illumination time of each color RGB light received by the data transmission / reception means 193, so that the DMD 6 To realize optical modulation.
The light source element drive control means 194 relates to the LED drive circuit 153 that drives the LEDs 151R, 151G, and 151B based on the illumination time received from the data transmission and reception means 193 and the control information of the light source light quantity. Generate and output the control command.
In the present embodiment, since the LED drive circuit 153 is provided in each of the LEDs 151R, 151G, and 151B, the light source element drive control means 194 uses the LED 151R based on the control information regarding the illumination time. Outputting control commands relating to on / off switching timing of the 151G and 151B to the LED driving circuit to dynamically change the illumination time of each color light of RGB. On the other hand, the light source element drive control means 194 adjusts the amount of light at the time of lighting of each LED 151R, 151G, and 151B based on the control information regarding the amount of light source light, and adjusts the amount of light source light.
In other words, in the present embodiment, the control information for the LED light sources 151R, 151G, and 151B is generated and controlled based on this, and the dynamic change in the illumination time of each color light of RGB and the adjustment of the light source light amount are adjusted. It can run at the same time.
[3] function of projection system
Next, the operation of the projection system described above will be described based on the flowchart shown in FIG. 15.
First, the image information generating means 191 of the computer 1C decodes the compressed image file as image information in units of frames and sequentially outputs it to the image processing means 92 and the image information analyzing means 94 (processing). S12).
The image information analyzing means 94 previously accumulates a plurality of frames of the image information in its frame buffer, analyzes each frame (process S13), and outputs the analysis result to the illumination light quantity calculating portion 95A, and illuminates The light quantity calculation unit 95A calculates the light source light quantity (process S14) and the illumination time of each color light of the RCB based on the analysis result (process S15).
The illumination light amount calculation unit 95A calculates the illumination time and the light source light amount for all the frames accumulated in the frame buffer (process S16), and when finished, the image processing means 92 performs an image of image information in units of frames. The process is started (process S17).
The data transmitting / receiving means 192 synchronizes the image information in the unit of frame processed by the image processing means 92 and control information about the illumination time and the light source light amount of each RCB color light synchronized with this, thereby encoding each information. To transmit to the projector 1B via the cable 1D (process S18).
When the data transmitting / receiving means 193 of the projector 1B receives the information from the computer 1C, the received information is decoded, and the DMD drive control means sends control information about the illumination time of the image information and each color light of RGB. And outputs control information regarding the illumination time of each color light of RGB and the light amount of the LED light sources 151R, 151G, and 151B to the light source element drive control means 194 (process S19).
The DMD drive control means 93 outputs a control command to the DMD drive circuit 61 based on the image information and the control information on the illumination time of each color light of RGB to drive control the DMD 6 (processing). S20).
At the same time, the light source element drive control means 194 outputs a control command to the LED drive circuit 153 on the basis of the control information regarding the illumination time and the light source light amount of each color light of RGB, and the LEDs 151R, 151G, and 151B. ) Is drive controlled (process S21).
According to this embodiment, the operation and effect similar to those of the embodiments described above can be enjoyed, and the cost of the projector 1B is high due to the use of the computer 1C which has recently speeded up image processing. The present invention can be realized without mounting a graphics processor, which is preferable to reduce the manufacturing cost of the projector 1B.
In addition, since the light source device 15 includes the three-color LEDs 151R, 151G, and 151B, only the LED drive circuit 153 is driven to control the illumination time and the LEDs 151R, Since the control of the light quantity of 151G and 151B can be performed simultaneously, the process structure of the control apparatus 9B can be simplified.
In addition, this invention is not limited to the Example mentioned above, It is including the deformation | transformation shown next.
In the first embodiment, the color wheel 41 is divided into RCB tricolor color filters 41R, 41C, and 41B. However, the present invention is not limited thereto, and the four color filters including a white color filter are provided. A color wheel partitioned into may be used.
In the third embodiment, the light source device 15 including the LEDs 151R, 151G, and 151B is employed in the projector 1B constituting the projection system. However, the present invention is not limited thereto, In the projector having a color LED, the control device may be provided with the same light source element drive control means as in the third embodiment.
In each of the above embodiments, the DMD 6 is employed as the reflection type optical modulation device. However, the present invention is not limited thereto, and the present invention may be used for a reflection type optical modulation device using a liquid crystal such as LCOS. . As a result, the present invention can be adopted as long as it is a projector having a format of displaying color images by time division.
In addition, the specific structure, the processing procedure, etc. at the time of implementing this invention may be another structure, etc. in the range which can achieve the objective of this invention.
1 is a schematic diagram showing the configuration of a projector according to a first embodiment of the present invention;
2 (a) is a front view showing the structure of the color wheel in the embodiment;
2B is a front view showing the structure of the color wheel in the embodiment;
3 is a block diagram showing a control device of a projector in the embodiment;
4 is a graph for explaining image analysis by the image information analyzing means in the embodiment;
5 is a flowchart for explaining the operation of the projector in the embodiment;
Figure 6 (a) is a graph for explaining the effect of the embodiment,
Figure 6 (b) is a graph for explaining the effect of the embodiment,
7 (a) is a graph for explaining the effect of the embodiment;
Figure 7 (b) is a graph for explaining the effect of the embodiment,
8 (a) is a graph for explaining the effect of the above embodiment;
8 (b) is a graph for explaining the effect of the embodiment;
9 is a schematic diagram showing the configuration of a projector according to a second embodiment of the present invention;
10 (a) is a front view showing the structure of the color wheel in the embodiment;
10 (b) is a front view showing the structure of the color wheel in the embodiment;
11 is a schematic front view showing the structure of a color light conversion device using a color wheel which is a variation of the embodiment;
12 is a block diagram showing a control device of a projector in the embodiment;
13 is a schematic diagram showing the configuration of a projector constituting the projection system according to the third embodiment of the present invention;
14 is a block diagram showing the structure of a projection system in the embodiment;
Fig. 15 is a flowchart for explaining the operation of the projection system in the embodiment.
6: DMD 9: control device
21: light source lamp 25: light source driving circuit
42: stepping motor 44: motor drive circuit
61: DMD driving circuit 91: image information input means
92: image processing means 93: DMD drive control means
94: image information analysis means 95A: illumination light amount calculation unit
95B: rotation drive control unit 95C: light source drive control unit
An illumination device for time-dividing a plurality of color lights, a reflective light modulation device for forming an optical image in time-division for each color light emitted from the illumination device, based on the input image information, and a reflective light modulation device. A projector having a projection optical device that enlarges and projects an optical image of each color light, and a control device that controls the illumination device and the reflective light modulation device.
Image information analyzing means for analyzing the input image information;
Illumination time control means for dynamically changing and controlling the illumination time for each color light by the illumination device based on an analysis result of the image information analysis means.
The image information analyzing means acquires a pixel having the highest gray level value of each color light in each frame constituting the input image information,
The illumination time control means controls the illumination device so as to set the illumination time from the pixel with the highest gradation value of each color light, and to continuously and repeatedly illuminate each color light with no blank period of illumination in one frame. Controlling the amount of light according to the number of times of illumination in one frame of each color light
Projector characterized by.
The lighting device,
A white light source for emitting white light, a color wheel provided at a rear end of the optical path of the white light source, partitioned into a transmission color region according to the plurality of color lights, and rotating a color light emitted by rotation; It is provided with rotation drive means for driving the rotation,
The lighting time control means,
An illumination light amount calculation unit that calculates an illumination light amount of each color light based on an analysis result of the image information analyzing means;
The rotation drive control part which outputs a control command to the said rotation drive means according to the calculated illumination light quantity of each color light, and performs rotation control of the said color wheel.
A white light source for emitting white light, a color wheel provided at a rear end of the optical path of the white light source, partitioned into a transmission color region according to the plurality of color lights, and rotating color light emitted by rotation;
Rotation driving means for rotating the color wheel;
Rotating shaft drive means for moving the rotating shaft of the color wheel in a plane perpendicular to the optical path of the white light source.
The ratio of the transmission color region of each color light in the ring-shaped band-shaped body along the circumferential direction centered on the rotation center of the color wheel depends on the radial position from the rotation center toward the outer peripheral end of the color wheel. Configured to change,
A rotating shaft position control unit for outputting a control command to the rotating shaft driving means in accordance with the calculated amount of illumination light of each color light to control the rotating shaft position of the color wheel.
The illumination device further includes light source driving means for driving the white light source,
The illumination time control means outputs a control command to the light source driving means according to the amount of illumination light of each color light calculated by the illumination light amount calculation unit, and adjusts the light amount of the white light source.
The illumination device has a dimming member having a dimming member provided freely on an optical path of a luminous flux emitted from the white light source and a dimming driving means for driving the dimming member so as to adjust an amount of light emitted from the white light source. Further provided with means,
The illumination time control means outputs a control command to the dimming drive means in accordance with the amount of illumination light of each color light calculated by the illumination light amount calculation unit, and adjusts the light amount by the dimming means.
A plurality of solid state light source elements provided in accordance with a plurality of color lights;
Light source element driving means for driving each solid light source element
A light source element drive control unit for outputting a control command to the light source element driving unit according to the amount of illumination light of each color light calculated by the illumination light amount calculating unit to adjust the amount of light of the solid light source element according to each color light
An illumination device that emits a plurality of color lights in time division, a reflective light modulation device that forms an optical image by time division for each color light emitted from the illumination device, and each color light formed in the reflective light modulation device A projector with a projection optics for projecting an optical image of the
A projection system connected to the projector via a transmission means, the projection system comprising an information processing device for outputting image information to the projector,
Image information analyzing means for analyzing image information output to the projector;
Illumination time control means for dynamically changing and controlling the illumination time for each color light by said illumination device based on an analysis result of said image information analysis means;
Data transmission means for transmitting an illumination time control command by said illumination time control means to said projector via said transmission means;
Projection system characterized in that.
Projection system comprising: a.
An illumination device that emits a plurality of color lights in time division, a reflective light modulation device that forms an optical image in time division for each color light emitted from the illumination device, based on the input image information, and each color light formed in the reflective light modulation device A computer-readable recording medium having recorded thereon a program executed on an information processing device for outputting image information to a projector having a projection optical device for projecting an optical image of
The illumination time control means controls the illumination device so as to set the illumination time from the pixel with the highest gradation value of each color light, and to continuously and repeatedly illuminate each color light with no blank period of illumination in one frame. And controlling the amount of light in accordance with the number of illuminations in one frame of each color light
A computer-readable recording medium having recorded thereon a program.
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