JP3901186B2 - Color sequential color projector system - Google Patents

Description

  The present invention relates to a color sequential color projector that displays a color image by sequentially switching red, blue, green, or red, blue, green, and white as time elapses.

  2. Description of the Related Art In recent years, color sequential color projector apparatuses that display color images by sequentially switching red, blue, and green colors as time passes have been generally used.

  A conventional color sequential color projector apparatus will be described below.

  2. Description of the Related Art Conventionally, a color sequential color projector device described in JP-A-2002-223453 is known. FIG. 15 is an overall configuration diagram of the color sequential color projector, FIG. 16 is a diagram showing a light source lighting sequence for reducing the color breakup phenomenon, and a bright image is displayed using two color sequential projectors. FIG. 17 shows the result of synthesizing the light output from the projectors when the projectors are used. In FIG. 15, 20 is a halogen lamp, 22 is a condensing lens, 24 is a color filter, 26 is a motor, 28 is an image generating device (liquid crystal panel), 30 is a projection lens, and 32 is a screen.

  The operation of the conventional color sequential color projector apparatus configured as described above will be described below.

  The light output from the halogen lamp 20 is condensed by the condensing lens 22 and enters the color filter 24. The color filter 24 is rotated by a motor 26 in synchronism with a video frame to be displayed. The color filter 24 is configured to select light of different colors in the order shown in FIG. 16 by rotation. Light is transmitted in the order of red, green, blue in the first frame, green, blue, red in the next frame, blue, red, green in the next frame, and these are repeated as one cycle.

With such a configuration, a so-called color breakup phenomenon, which is caused by the separation of red, blue, and green colors, which is generated by a color sequential method of switching colors and displaying a color image, switches between red, green, and blue in one frame period. There is an effect that the sequence is set to one period and is reduced as compared with a method of repeating this sequence.
JP 2002-223453 A

  However, in the conventional configuration described above, in the stack configuration in which the same image is input to two or more projectors and the images are superimposed to display a bright image, the light output from each projector is red, blue, , Green, or green, blue, red, or blue, red, or green, there is no correlation between the projectors. For example, as shown in FIG. 17, a stack display using two projectors is performed. If so, there are three cases depending on the combination of sequences.

  (Case 1) is the case where two projectors operate at exactly the same timing, and the output light of the combined projector will be red, blue, and green twice as bright as the one projector, and the color resulting from the combination of the two projectors The effect of crack reduction does not occur.

  For (Case 2) and (Case 3), the combined projector output light is cyan, magenta, and yellow, and the red, blue, and green intensities contained in each color are the same as when one unit is used. , Color breakup is improved.

  Whether the condition (Case 1), (Case 2), or (Case 3) is satisfied cannot be controlled by the configuration of the conventional color sequential color projector, and it is not determined whether or not the color breakup is improved. There were no challenges.

  Further, in the above-described conventional configuration, it is necessary to use a very complicated filter that selects colors in the order of red, green, blue, green, blue, red blue, red, and green as the illumination light color switching filter. It was.

  The present invention solves the above-mentioned conventional problems, and is accidentally affected in the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image. It is another object of the present invention to provide a color sequential color projector apparatus that can stably improve color breakup and that can use a simple configuration for an illumination light color switching filter.

The present invention described in claim 1 of the present invention
A delay circuit that receives and outputs a vertical synchronization signal as a delay;
Delay time control means for controlling the delay time of the delay circuit;
The vertical sync signal, horizontal sync signal, video signal, and output of the delay circuit are input, and the input video signal is synchronized with the vertical sync signal and horizontal sync signal to convert the image format and synchronize with the output of the delay circuit. An image format conversion circuit for output,
A light source that generates light;
An illumination light color switching filter capable of selecting and outputting a part of the wavelength component with the output of the light source as input and switching the wavelength to be selected;
Illumination light that receives the output of the delay circuit as an input, drives the illumination light color switching filter in synchronization with the output of the delay circuit, and synchronizes the switching timing of the wavelength selected by the illumination light color switching filter with the output of the delay circuit A switching filter driving circuit;
A light modulation element that receives the output of the illumination light color switching filter and the output of the image format conversion circuit as input and modulates and outputs the output of the illumination light color switching filter according to the output of the image format conversion circuit. Is composed
In the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image, it is possible to stably improve color breakup without being affected by chance. In addition, it has an effect of providing a color sequential color projector apparatus that can use a simple configuration of the illumination light color switching filter.

The present invention described in claim 2 of the present invention is the color sequential color projector apparatus according to claim 1 of the present invention, comprising a microcomputer connected to the communication line,
The microcomputer is configured to control the delay time control means according to claim 1,
In the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image, it is possible to stably improve color breakup without being affected by chance. In addition, it has an effect of providing a color sequential color projector apparatus that can use a simple configuration of the illumination light color switching filter.

According to a third aspect of the present invention, there is provided the color sequential color projector according to the second aspect of the present invention, wherein the vertical synchronization signal and the output of the microcomputer are input and the output is synchronized with the vertical synchronization signal. Equipped with an output vertical sync signal generation circuit that outputs a vertical sync signal,
The phase relationship between the vertical synchronizing signal of the output vertical synchronizing signal generating circuit and the output vertical synchronizing signal is reset by the microcomputer, and the output of the output vertical synchronizing signal generating circuit is transferred to the delay circuit instead of the vertical synchronizing signal. Configured to be entered,
In the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image, it is possible to stably improve color breakup without being affected by chance. In addition, it has an effect of providing a color sequential color projector apparatus that can use a simple configuration of the illumination light color switching filter.

The present invention according to claim 4 of the present invention provides
A delay circuit that receives and outputs a vertical synchronization signal as a delay;
Delay time control means for controlling the delay time of the delay circuit;
The vertical sync signal, horizontal sync signal, video signal, and output of the delay circuit are input, and the input video signal is synchronized with the vertical sync signal and horizontal sync signal to convert the image format and synchronize with the output of the delay circuit. An image format conversion circuit for output,
A multi-color light source capable of outputting light of multiple colors;
A multi-color light source driving circuit for driving the multi-color light source;
A light modulation element that outputs an output of the multi-color light source and an output of the image format conversion circuit as inputs and modulates an output of the illumination light color switching filter according to an output of the image format conversion circuit;
It is configured to include
In the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image, it is possible to stably improve color breakup without being affected by chance. The color sequential color projector apparatus is provided.

  As described above, in the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image, the color breakup is stably improved without being influenced by chance. An excellent effect of providing a color sequential color projector device that can be used with a simple illumination light color switching filter is obtained.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 and 5 to 13.

(Embodiment 1)
FIG. 1 is a diagram showing a configuration of a color sequential color projector apparatus according to the present invention.

  In FIG. 1, 1 is a light source, 2 is an illumination light color switching filter, 3 is a light modulation element, 4 is an illumination light switching filter drive circuit, 5 is an image format conversion circuit, 6 is a delay circuit, and 7 is a delay time control means. is there.

  FIG. 5 is a diagram for explaining the movement of the position of the white line image formed on the retina by the high-speed rotation of the eyeball when a human sees the white line projected by the color sequential color projector.

  FIG. 6 shows that when the white line image on the retina moves with the rotation of the eyeball, the white line is expressed in the color sequence of red, green, and blue, so that the color of light irradiated on the retina It is a figure which shows changing according to a position.

  FIG. 7 is a diagram illustrating an example in which a stack configuration in which the same image is input to two projectors and a bright image is displayed by superimposing the images of the projectors is realized by two units.

  In FIG. 7, 12 is a distributor for distributing a vertical synchronizing signal and a horizontal synchronizing signal video signal, 13 is a first color sequential color projector apparatus according to the present invention, and 14 is a second color sequential color projector apparatus according to the present invention. is there.

  FIG. 8 shows a stack configuration of two projectors of the color sequential color system of the present invention, and the delay time set for the first projector and the delay time set for the second projector are set to 1 of the illumination light color switching filter. It is a figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when it shifted only the time of one color.

  FIG. 9 shows a stack configuration of two projectors of the color sequential color system according to the present invention. The delay time set for the first projector and the delay time set for the second projector are set to 1 of the illumination light color switching filter. It is a figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when it shifted only 1.5 time of the time of one color.

  FIG. 10 shows a delay time for setting the switching colors of the illumination light switching filter of the projector apparatus of the color sequential color system of the present invention to red, blue, green, and white, two units being stacked, and setting the first projector; It is a figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when the delay time set to a 2nd projector is shifted only the time of one color of an illumination light color switching filter.

  FIG. 11 shows that the colors to be switched by the illumination light switching filter of the projector device of the color sequential color system of the present invention are red, blue, green, and white, the delay time set for the first projector, and the second projector. It is a figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when delay time is shifted only 1.5 time of the time of one color of an illumination light color switching filter.

  FIG. 12 is a diagram illustrating an example in which a stack configuration in which the same image is input to three projectors and a bright image is displayed by superimposing the images of the projectors is realized by three units.

  In FIG. 12, 12 is a distributor for distributing a vertical synchronizing signal and a horizontal synchronizing signal video signal, 15 is a first color sequential color projector apparatus of the present invention, 16 is a second color sequential color projector apparatus of the present invention, Reference numeral 17 denotes a third color sequential color projector apparatus according to the present invention.

  FIG. 13 shows a stack configuration of three color sequential color projectors according to the present invention, a delay time set for the first projector, a delay time set for the second projector, and a third projector. It is a figure which shows the modulation | alteration output light which synthesize | combined the output light of three projectors when delay time is shifted only by the time of one color of an illumination light color switching filter, respectively.

  The operation of the color sequential color projector apparatus configured as described above will be described with reference to FIGS. 1 and 5 to 13.

  In FIG. 1, the input vertical synchronization signal is delayed by a delay circuit 6 in which a delay time is set by a delay time control means 7. The image format conversion circuit 5 takes in the input video signal according to the input horizontal synchronization signal and vertical synchronization signal, and outputs an image whose image format has been converted in synchronization with the output of the input delay circuit 6. The illumination light switching filter drive circuit 4 drives the illumination light color switching filter 2 in synchronization with the output of the delay circuit 6.

  The light source light output from the light source 1 is input to the illumination light color switching filter 2, and the color is selected and output as illumination light. The light modulation element 3 modulates the input illumination light according to the output of the image format conversion circuit 5 and outputs it as a modulated light output.

  With such a configuration, the timing at which the color of the modulated light output changes can be adjusted by an arbitrary time delay set by the delay time control means 7 based on the timing of the input vertical synchronization signal.

  The delay control means 7 mounts a switch on the projector, for example, and controls the delay time that the delay control means 7 reads the state of the switch and sets it in the delay circuit 6, or the delay control means 7 The display for setting the delay time is displayed on the screen, and the delay time set in the delay circuit 6 is controlled according to the operation of the projector remote control.

  Next, a phenomenon in which red, green, and blue color bands are seen by the rotational movement of the eyeball when white lines are displayed by the color sequential color projector device, that is, a so-called color breakup phenomenon will be described with reference to FIGS. explain.

  FIG. 5 shows that the position of the white line image formed on the retina is moved by the high-speed rotation of the eyeball when a human sees the white line projected by the color sequential color projector apparatus. In the states shown from A to C in FIG. 5, the positions of the white line images formed on the retina are different. A diagram in which these images are superimposed is shown in a diagram in which white line images on the retina in FIG. 5 are superimposed. Even if the position of the white line on the screen does not move, it can be seen that the position of the white line on the retina moves depending on the rotational position of the eyeball.

  In human eyes, the eyeball rotates at a high speed when moving the line of sight, and the position of the image displayed on the retina moves at a high speed as the eyeball rotates.

  FIG. 6 shows that when the white line image on the retina moves with the rotation of the eyeball, the white line is expressed in red, green, and blue in order of color, so that the color of light emitted on the retina depends on the position on the retina. FIG.

  The light output from the color sequential color projector device changes with time as shown by the white line color in FIG.

  In FIG. 6, the horizontal axis is described so that the position where the white line moves on the retina due to the rotation of the eyeball and the position of the color of the light output from the color sequential color projector apparatus match.

  In FIG. 6, since the white line has a width, the light on the retina by the left end of the white line and the light irradiated on the retina by the right end of the white line are different in position on the retina. Are listed side by side.

  When a white line having a width moves on the retina, the light emitted to the retina is equivalent to an output when a filter that averages the white line color of FIG. The color band is as shown in the color observed at each position above. The change in the red and green-blue bands in which the color shown in the white line color in FIG. 6 changes rapidly is observed as a band in which the white line width changes smoothly.

  Based on the above principle, when a white line or the like is displayed on a color sequential color projector, a phenomenon in which red, green, and blue color bands are visible due to the rotational movement of the eyeball, a so-called color breakup phenomenon occurs.

  As shown in FIG. 7, in a stack configuration in which the same signal is distributed and input to two projectors and the output lights of these projectors are combined and displayed, the delay time set for the first projector and the second FIG. 8 shows modulated output light obtained by synthesizing the output lights of two projectors when the delay time set for the projector is shifted by the time of one color of the illumination light color switching filter.

  As shown in FIG. 8, the combined modulated output light is magenta, yellow, and cyan, and the red contained in each color compared to the combined red, green, and blue without shifting the delay time. The brightness of green and blue is halved, and the strength of color breakup recognized by humans is improved.

  Although FIG. 8 shows the case where the time widths of red, green, and blue are uniform, the same effect can be obtained when the time widths of red, green, and blue are not uniform.

  As shown in FIG. 7, in a stack configuration in which the same signal is distributed and input to two projectors and the output lights of these projectors are combined and displayed, the delay time set for the first projector and the second FIG. 9 shows the modulated output light obtained by synthesizing the output lights of the two projectors when the delay time set for the projector is shifted by 1.5 times the time field of one color of the illumination light color switching filter.

  As shown in FIG. 9, the combined modulated output light is magenta, yellow, and cyan, and compared to the combined red, green, and blue without shifting the delay time, red, green, Since the brightness of blue is halved and the repetition period is halved, the strength of color breakup recognized by humans is greatly improved.

  As shown in FIG. 7, in a stack configuration in which the same signal is distributed and input to two projectors and the output lights of these projectors are combined and displayed, the delay time set for the first projector and the second The delay time set for the projector is shifted by the time of one color of the illumination light color switching filter, and the outputs of the two projectors when the colors selected by the illumination light color switching filter 2 are red, green, blue and white FIG. 10 shows modulated output light obtained by combining the lights.

  As shown in FIG. 10, the combined modulated output light is a repetition of white + red, yellow, cyan, white + blue, and red, green, and blue for each color as compared to the combined red, green, and blue without shifting the delay time. The brightness of the color becomes 1/2, and the strength of color breakup recognized by humans is improved.

  FIG. 10 shows the case where the time widths of red, green, blue, and white are equal, but the same effect can be obtained when the time widths of red, green, blue, and white are not equal.

  As shown in FIG. 7, in a stack configuration in which the same signal is distributed and input to two projectors and the output lights of these projectors are combined and displayed, the delay time set for the first projector and the second The delay time set for the projector is shifted by 1.5 times the time field of one color of the illumination light color switching filter, and the colors selected by the illumination light color switching filter 2 are red, green, blue and white. FIG. 11 shows the modulated output light obtained by combining the output lights of the projectors.

  As shown in FIG. 11, the synthesized modulated output light is magenta, white + red, white + green, yellow, magenta, cyan, white + green, white + blue, and is synthesized without shifting the delay time. Compared to red, green, and blue repetition, the brightness of red, green, and blue for each color is halved and the repetition period is halved. The

  As shown in FIG. 12, in a stack configuration in which the same signal is distributed and input to three projectors and the output lights of these projectors are combined and displayed, the delay time set for the first projector, Modulated output that combines the output light of three projectors when the delay time set for the third projector and the delay time set for the third projector are each shifted by the time of one color of the illumination color switching filter The light is shown in FIG. In this case, since the synthesized modulated output light is white, color breakup does not occur.

(Embodiment 2)
FIG. 2 is a diagram showing the configuration of the color sequential color projector apparatus of the present invention.

  In FIG. 2, reference numeral 8 denotes a microcomputer, and other components are the same as those of the color sequential color projector apparatus of the present invention shown in FIG. The difference is that the delay time control means 7 is controlled by the microcomputer 8.

  FIG. 14 is a diagram showing connections when a stack configuration is realized by using two color sequential color projectors shown in FIG. 2 of the present invention. The first projector and the second projector are connected by a communication line.

  The operation for reducing the color breakage is the same as that of the color sequential color projector apparatus of the present invention shown in FIG. 1, but since the first projector and the second projector are connected by the communication line, Communication between microcomputers is possible, and the delay time set by the delay time control means 7 can be automatically adjusted.

(Embodiment 3)
FIG. 3 is a diagram showing the configuration of the color sequential color projector apparatus of the present invention.

  In FIG. 3, reference numeral 9 denotes an output vertical synchronizing signal generation circuit, and the other components are the same as those of the color sequential color projector apparatus of the present invention shown in FIG. 2 is different from the color sequential color projector apparatus of the present invention shown in FIG. 2 in that the output of the output vertical synchronizing signal generating circuit 9 is input to the delay circuit 6 instead of the vertical synchronizing signal.

  The output vertical synchronization signal generation circuit 9 synchronizes with the input vertical synchronization signal, and generates an output vertical synchronization signal having a frequency that is an integer times an integer multiple of the frequency of the vertical synchronization signal. When a plurality of projectors are stacked, the microcomputers 8 of the projectors synchronize using communication lines, and the vertical synchronization signal of the output vertical synchronization signal generation circuit 9 and the output vertical synchronization signal are synchronized at the same timing. Reset the phase relationship. By this operation, the output vertical synchronizing signal generation circuit 9 of each projector operates at the same timing, and the illumination light color switching filter drive circuit 4 and the image format conversion circuit 5 of each projector are connected to the respective delay circuits 6. Therefore, the operation is shifted by the difference in delay time set in (1).

  In this way, color breakup is reduced by the same operation as the color sequential color projector apparatus of the present invention shown in FIG.

(Embodiment 4)
FIG. 4 is a diagram showing the configuration of the color sequential color projector apparatus of the present invention.

  In FIG. 4, 10 is a multi-color light source, and 11 is a multi-color light source driving circuit. The light source 1 and the illumination light color switching filter 2 shown in FIG. 1 are replaced with a multi-color light source 10, the illumination light switching filter drive circuit 4 shown in FIG. 1 is replaced with a multi-color light source drive circuit 11, and the configuration shown in FIG. The same light as the illumination light output from the block configured by the light source 1, the illumination light color switching filter 2, and the filter drive circuit 4 is output from the block configured by the multi-color light source 10 and the multi-color light source drive circuit 11. It is configured.

  With such a configuration, color breakup is reduced by the same operation as the configuration of the color sequential color projector apparatus of the present invention shown in FIG.

  The color sequential color type projector apparatus according to the present invention is not affected by chance in the case of a stack configuration in which the same signal is input to two or more projectors and the images are superimposed to display a high brightness image. It has the effect of providing a color sequential color projector that can stably improve color breakup using a simple illumination light color switching filter, and is red, blue, green or red, blue, green, white This is useful for a color sequential color projector that displays a color image by switching the colors in order as time passes.

The figure which shows the structure of the color sequential color system projector apparatus of Embodiment 1 of this invention. The figure which shows the structure of the color-sequential color system projector apparatus of Embodiment 2 of this invention. The figure which shows the structure of the color-sequential color system projector apparatus of Embodiment 3 of this invention. The figure which shows the structure of the color-sequential color system projector apparatus of Embodiment 4 of this invention. Diagram explaining the color breaking phenomenon Diagram explaining the color breaking phenomenon Diagram showing an example of realizing a stack configuration with two units The figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when only the time of one color of the illumination light color switching filter shifted | deviated The figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when it shifted only 1.5 time of the time of one color of an illumination light color switching filter The figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when only the time of one color of the illumination light color switching filter shifted | deviated The figure which shows the modulation | alteration output light which synthesize | combined the output light of two projectors when it shifted only 1.5 time of the time of one color of an illumination light color switching filter The figure which shows the example which actualizes the stack constitution with 3 units The figure which shows the modulated output light which synthesize | combined the output light of three projectors Diagram showing connection when stack configuration is realized with two units Overall configuration diagram of a conventional color sequential color projector The figure which shows the light source lighting order for suppressing the color breakup phenomenon of the conventional color sequential color system projector device The figure which shows the synthesis | combination of the output light in the case of displaying a bright image | video using two conventional color sequential color system projector apparatuses.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Light source 2 Illumination light color switching filter 3 Light modulation element 4 Illumination light switching filter drive circuit 5 Image format conversion circuit 6 Delay circuit 7 Delay time control means 8 Microcomputer 9 Vertical synchronization signal generation circuit for output 10 Multiple color light source 11 Multiple colors Light source drive circuit 12 Distributor 20 Halogen lamp 22 Condensing lens 24 Color filter 26 Motor 28 Image generation device (liquid crystal panel)
30 projection lens 32 screen

Claims (4)

A delay circuit that receives and outputs a vertical synchronization signal as a delay;
Delay time control means for controlling the delay time of the delay circuit;
The vertical sync signal, horizontal sync signal, video signal, and output of the delay circuit are input, and the input video signal is synchronized with the vertical sync signal and horizontal sync signal to convert the image format and synchronize with the output of the delay circuit. An image format conversion circuit for output,
A light source that generates light;
An illumination light color switching filter capable of selecting and outputting a part of the wavelength component with the output of the light source as input and switching the wavelength to be selected;
Illumination light that receives the output of the delay circuit as an input, drives the illumination light color switching filter in synchronization with the output of the delay circuit, and synchronizes the switching timing of the wavelength selected by the illumination light color switching filter with the output of the delay circuit A switching filter driving circuit;
A light modulation element that outputs an output of the illumination light color switching filter and an output of the image format conversion circuit as inputs and modulates an output of the illumination light color switching filter according to an output of the image format conversion circuit;
A color sequential color projector apparatus characterized by comprising: It has a microcomputer connected to the communication line,
2. The color sequential color projector according to claim 1, wherein the microcomputer controls the delay time control means. An output vertical synchronization signal generation circuit that outputs a vertical synchronization signal and an output vertical synchronization signal that is synchronized with the vertical synchronization signal, using the vertical synchronization signal and the output of the microcomputer as inputs;
The phase relationship between the vertical synchronization signal of the output vertical synchronization signal generating circuit and the output vertical synchronization signal is reset by the microcomputer, and the output of the output vertical synchronization signal generating circuit is sent to the delay circuit instead of the vertical synchronization signal. 3. The color sequential color projector according to claim 2, wherein the color sequential color projector is input. A delay circuit that receives and outputs a vertical synchronization signal as a delay;
Delay time control means for controlling the delay time of the delay circuit;
The vertical sync signal, horizontal sync signal, video signal, and output of the delay circuit are input, and the input video signal is synchronized with the vertical sync signal and horizontal sync signal to convert the image format and synchronize with the output of the delay circuit. An image format conversion circuit for output,
A multi-color light source capable of outputting light of multiple colors;
A multi-color light source driving circuit for driving the multi-color light source;
A light modulation element that outputs an output of the multi-color light source and an output of the image format conversion circuit as inputs and modulates an output of the illumination light color switching filter according to an output of the image format conversion circuit;
A color sequential color projector apparatus characterized by comprising:

Images