JP2021092649A - Projection type display device and projection type display system - Google Patents

Abstract

To provide a projection type display device improved in gradation at the time of superposition projection.SOLUTION: A projection type display device (1) includes: a display element (113) for displaying an input video; color light generation means (124) capable of switching color incident on the display element in time division; drive means (105) for driving the display element based on the input video for each period of color incident from the color light generation means; and control means (104) for controlling the color light generation means so as to switch the number of color incident on the display element during a first frame period of the display element.SELECTED DRAWING: Figure 1

Description

The present invention relates to a projection type display device.

In a projector, as one method for realizing color display, color sequential display (display by the color sequential method) in which the color of the incident light on the display panel is controlled by time division is generally used. In the color sequential method, colors consisting of red, green, blue, or a combination thereof are incident on the display panel in different colors depending on the time in one frame, and the display panel receives a signal of the corresponding color for each time. By driving accordingly, a color image for each frame is displayed.

The drive according to the gradation level for each pixel of the display panel controls the lighting time in each color so that the display brightness integrated for one frame time becomes the target brightness according to the gradation value visually. Is controlled by. However, the minimum lighting period and the control unit time cannot be made smaller than a predetermined time due to the responsiveness of the display panel or the like. As a result, the brightness of one frame is not the ideal brightness with respect to the gradation value, and the gradation property is deteriorated.

On the other hand, a method (stack projection or superimposition projection) is known in which a plurality of projectors are installed at close positions and projected toward the same projection area to obtain a brighter projection image than the projection using one projector. ing. However, even in the case of stack projection, the gradation property is deteriorated because the time of each color is shorter in the color sequential method than in the case where the gradation is controlled by one frame time of each color.

Therefore, Patent Document 1 discloses a method of improving the gradation by adjusting the rise timing and the fall timing according to the signal fall time and rise time.

JP-A-2018-128497

However, in the method disclosed in Patent Document 1, since the time of each color does not change, the degree of improvement in gradation is limited.

Therefore, an object of the present invention is to provide a projection type display device and a projection type display system having improved gradation during superimposed projection.

The projection type display device as one aspect of the present invention includes a display element for displaying an input image, a color light generating means capable of switching the color incident on the display element in a time-divided manner, and a color incident from the color light generating means. Control to control the driving means for driving the display element based on the input image and the color light generating means so as to switch the number of colors incident on the display element in one frame period of the display element. Has means and.

The projection type display system as another aspect of the present invention is a projection type display system including a plurality of projection type display devices, and at least one of the plurality of projection type display devices is the projection type display device.

Other objects and features of the present invention will be described in the following examples.

According to the present invention, it is possible to provide a projection type display device and a projection type display system having improved gradation during superimposed projection.

It is a block diagram of the projector in Example 1. FIG. It is explanatory drawing of the color wheel in Example 1. FIG. It is explanatory drawing of the control at the time of a normal projection in Example 1. FIG. It is explanatory drawing of the stack projection in Example 1. FIG. It is explanatory drawing of the control at the time of stack projection in Example 1. FIG. It is explanatory drawing of the color wheel in Example 1. FIG. It is explanatory drawing of the color wheel in Example 1. FIG. It is explanatory drawing of the color wheel in Example 1. FIG. It is a block diagram of the projector in Examples 2 and 3. It is explanatory drawing of the fluorescent wheel in Example 2. FIG. It is explanatory drawing of the control at the time of a normal projection in Example 2. FIG. It is explanatory drawing of the stack projection in Examples 2 and 3. It is explanatory drawing of the control at the time of stack projection in Example 2. FIG. It is explanatory drawing of the fluorescent wheel in Example 2. FIG. It is explanatory drawing of the fluorescent wheel in Example 3. FIG. It is explanatory drawing of the control at the time of stack projection in Example 3. FIG. It is explanatory drawing of the fluorescent wheel in Example 3. FIG. It is explanatory drawing of the fluorescent wheel in Example 3. FIG. It is a block diagram of the projector in Example 4. FIG. It is explanatory drawing of the control at the time of a normal projection in Example 4. FIG. It is explanatory drawing of the control at the time of stack projection in Example 4. FIG.

Hereinafter, examples of the present invention will be described in detail with reference to the drawings.

First, the projector (projection type display device) according to the first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a configuration diagram of the projector 1.

An input signal (input image) is input to the input terminal 101 of the projector 1 from an external device (not shown). The video input circuit 102 determines the type of input signal. When the input signal is an analog video signal, the video input circuit 102 performs A / D conversion and outputs a digital video signal. The video processing circuit 103 performs image processing on the digital video signal. Further, the video processing circuit 103 adjusts the signal input to the panel drive circuit 105 by the controller 121 to perform image processing unique to the projector 1 and user adjustment using the operation panel 122, the remote controller 123, or the like. To control. Then, the video processing circuit 103 outputs an RGB signal that has undergone various image processing in this way.

The color light generating means 124 has a light source 107 and a color wheel (wheel) 111, and is controlled by a color separation control circuit (control means) 104. The color light generating means 124 is configured so that the color incident on the display panel 113 can be switched in a time-division manner. The display panel 113 is a display means for displaying an input image in which a plurality of pixels are arranged in a matrix. In this embodiment, the display panel 113 is a reflective or transmissive liquid crystal panel, but the present invention is not limited to these, and other display means such as a DMD (Digital Micromirror Device) may be used. The light of the light source 107 is converted into light of different colors by time-dividing one frame in the color wheel 111, and is incident on the display panel 113 via the optical system 115. For example, when one frame period (frame frequency) of the image to be displayed is 60 Hz, the display panel 113, which is a single plate, displays R, G, and B in a time-division manner, so that 180 Hz (one frame period of the display element, a frame). It is driven by an integral multiple of the frequency). This enables full-color display of R, G, and B on one display panel 113. Such a method is generally called a color sequential method.

Next, an example of the color wheel 111 will be described with reference to FIG. FIG. 2 is an explanatory diagram of the color wheel 111. The color wheel 111 has a wheel shape and has, for example, a region on the circumference that transmits R light (red), G light (green), and B light (blue) with respect to W light (white). By irradiating the illumination light of the light source 107 on the position 204 (R + G + B region) on the circumference of the color wheel 111 rotating at a frequency that is an integral multiple of the frame frequency, each RGB color light can be obtained within one frame.

The optical system 115 causes each color light from the color wheel 111 to enter the display panel 113. The panel drive circuit (drive means) 105 modulates the display panel 113 according to the gradation value of each color of each pixel for each period of R light, G light, and B light. In this embodiment, the panel drive circuit 105 drives the display panel 113 based on the input image for each period of the color incident from the color light generating means 124. Further, as shown in FIG. 1, the optical system 115 projects an image on the screen 901, which is a projection surface, by incidenting the modulated light from the display panel 113 on the projection optical system 116.

FIG. 3 is an explanatory diagram of control during normal projection, and controls the light source 107, the color wheel 111, and the display panel 113 when the color wheel 111 is rotated once per frame, and obtained by the control. The state of the projected light is shown. When performing normal projection (when projecting using only one projector 1), the position 204, which is the R + G + B region in FIG. 2, is irradiated. The color separation control circuit 104 lights a time corresponding to each color gradation value of each pixel of the display panel 113 within each period of R light, G light, and B light obtained by incident on the display panel 113. Controls the color light generating means 124. In general, as shown in FIG. 3, the case where the light is turned on for the entire period of each color period is set as the maximum gradation, and by controlling the ratio of turning off and turning on during that period, the display is visually integrated for one frame time. The brightness is controlled so as to be the target brightness according to the gradation value. As a result, as shown in FIG. 3, one frame of full-color projected light is obtained, and by executing this for each frame of the display panel 113, the input signal (input image) is projected.

Next, with reference to FIGS. 4 to 8, the projection type display system 10 including the three projectors 1, 2 and 3 and the control of the projection type display system 10 at the time of stack projection (superimposed projection) will be described. .. FIG. 4 is an explanatory diagram of stack projection by the projection type display system 10 in this embodiment, and shows a state of stack projection in which the same image is projected at the same position using projectors 1, 2 and 3 to obtain high display brightness. Shown. As shown in FIG. 4, the projection type display system 10 of this embodiment includes three projectors 1, 2, and 3 and a distributor 130 that distributes an input signal to each projector.

FIG. 5 is an explanatory diagram of control at the time of stack projection, and shows the control of the light source 107, the color wheel 111, and the display panel 113 for each of the projectors 1, 2, and 3, and the state of the projected light obtained by the control. Shown. This control can be performed by instructing the operation of the operation panel 122 or the remote controller 123 or by communication means, or the stack projection may be detected by detecting the projection surface or the like.

6 is an explanatory diagram of the color wheel of the projector 1, FIG. 7 is an explanatory diagram of the color wheel of the projector 2, and FIG. 8 is an explanatory diagram of the color wheel of the projector 3. Regarding the projector 1, as shown in FIG. 6, the color wheel 111 is configured so that the light of the light source 107 irradiates the position 201 where only the red region on the circumference of the color wheel 111 exists. Similarly, with respect to the projector 2, as shown in FIG. 7, the color wheel 111 is configured so that the light of the light source 107 irradiates the position 203 where only the green region on the circumference of the color wheel 111 exists. Further, as shown in FIG. 8, the projector 3 is configured with the color wheel 111 at a position 202 where the light of the light source 107 exists only in the blue region on the circumference of the color wheel 111.

As shown in FIG. 8, the panel drive circuit 105 has a maximum gradation when the light is turned on for each enlarged color light period, and by controlling the ratio of turning off and turning on during that period, it is visually 1 The display brightness integrated with the frame time is controlled to be the target brightness according to the gradation value.

As described above, in the present embodiment, the color separation control circuit 104 controls the color light generating means 124 so as to switch the number of colors incident on the display panel 113 in one frame period of the display panel 113. Preferably, the color light generating means 124 has a light source 107 and a color wheel 111 in which a plurality of regions having different transmitted colors with respect to the incident light from the light source 107 are arranged in the circumferential direction. The color wheel 111 is provided with a plurality of regions having a predetermined width in the radial direction and having different transmitted colors. The color separation control circuit 104 switches the number of colors incident on the display panel 113 in one frame period of the display panel 113 by controlling the radial position of the incident light incident on the color wheel 111. Further, preferably, the color separation control circuit 104 rotates the color wheel 111 at an integral multiple of the frame frequency of the input image to switch the color incident on the display panel 113 in a time division manner.

The projector 1 (projection type display system 10) of the present embodiment does not change the minimum lighting period and the control unit time as compared with the conventional projection using only one projector, but for each color light, The maximum lighting time at the maximum gradation becomes longer. In other words, the gradation can be controlled in one frame time for each color. Therefore, the projector 1 of the present embodiment can control the brightness of one frame with respect to the gradation property to be close to the ideal, and the gradation property is improved. In addition, color-sequential projectors are based on the premise that the colors that make up one frame overlap in the same place on the retina, and the colors that make up the retina appear separately the moment the viewpoint is moved according to the movement of the image. The cracking phenomenon is visually recognized. On the other hand, according to the projector 1 of the present embodiment, it is possible to reduce the visibility of the color cracking phenomenon as compared with the conventional projection or the projection using only one projector.

Next, the projector (projection type display device) according to the second embodiment of the present invention will be described with reference to FIG. FIG. 9 is a configuration diagram of the projector 1a. Refer to FIG. 1 in that the projector 1a of the present embodiment has a display panel 114, a panel drive circuit 106 for driving the display panel 114, and a color light generation means 124a instead of the color light generation means 124. This is different from the projector 1 of the first embodiment described above. Since the other configurations of the projector 1a are the same as those of the projector 1, the description thereof will be omitted.

The color light generating means 124a has a light source 110 and a fluorescence wheel (wheel) 112. The light of the light source 110 is time-divided into one frame by the fluorescence wheel 112 to generate light of different colors. The light generated by the colored light generating means 124a is incident on the display panel (display element) 113 or the display panel (display element) 114 via the optical system 115. With such a configuration, full-color display is possible on the two display panels 113 and 114. This method is generally called a color sequential method.

Next, the fluorescent wheel 112 will be described with reference to FIG. FIG. 10 is an explanatory view of the fluorescent wheel 112. The fluorescent wheel 112 has a wheel shape and has, for example, a fluorescent region (Y) that converts B light into Y color and a region (C) that transmits B light as it is on the circumference. Here, the period for transmitting B light as it is is shorter than the period for converting to Y color.

By irradiating the position 211 on the circumference of the fluorescent wheel 112 that rotates at an integral multiple of the frame frequency with the light of the light source 110, Y light (yellow) and B light can be obtained within one frame. The optical system 115 incidents B light and R light constituting Y light on the display panel 113, and incidents G light constituting Y light on the display panel 114. The panel drive circuit (drive means) 105 displays the display panel 113 for each period of R light and G light, and the panel drive circuit (drive means) 106 displays the display panel 114 for each period of G light, and the gradation value of each color of each pixel. Modulate according to. The optical system 115 projects an image on the screen 901 by incidenting the modulated light from the display panel 113 on the projection optical system 116.

FIG. 11 is an explanatory diagram of control during normal projection in the present embodiment, and controls the light source 110, the fluorescent wheel 112, and the display panels 113 and 114 when controlling the fluorescence wheel 112 to rotate once per frame. The state of the projected light obtained by this is shown. Within the period of the obtained R light and B light incident on the display panel 113, the time corresponding to the gradation value of each pixel R and B of the display panel 113 is lit. Similarly, within the period of the obtained G light incident on the display panel 114, the time corresponding to the gradation value of each pixel G of the display panel 114 is lit. In general, as shown in FIG. 11, the case where the light is turned on for the entire period of each color period is set as the maximum gradation, and by controlling the ratio of turning off and turning on during that period, the display is visually integrated for one frame time. The brightness is controlled so as to be the target brightness according to the gradation value. As a result, as shown in FIG. 11, one frame of full-color projected light is obtained, and by executing this for each frame of the input signal, the input image is projected.

FIG. 12 is an explanatory diagram of stack projection by the projection type display system 10a in this embodiment, and shows a state of stack projection in which the same image is projected at the same position using projectors 1a and 2a to obtain high display brightness. FIG. 13 is an explanatory diagram of control at the time of stack projection, and shows the control of the light source 110, the fluorescent wheel 112, and the display panels 113 and 114 for each of the projectors 1a and 2a, and the state of the projected light obtained by the control. Shown. This control can be performed by instructing the operation of the operation panel 122 or the remote controller 123 or by communication means, or the stack projection may be detected by detecting the projection surface or the like.

The projector 1a controls, for example, the fluorescent wheel 112 in the same manner as before the non-stack projection. The projector 2a stops the fluorescent wheel 112 in a region where B light is transmitted as it is. FIG. 14 is an explanatory view of the fluorescent wheel 112. As shown in FIG. 14, the panel drive circuit 105 of the projector 2a visually sets the case where the light is turned on for a period of R light longer than the B light as the maximum gradation, and controls the ratio of turning off and turning on during that period. The display brightness integrated for one frame time is controlled to be the target brightness according to the gradation value.

As described above, in the present embodiment, the color light generating means 124a has a light source 110 and a fluorescence wheel 112 in which a region for converting the color of the incident light from the light source 110 is arranged in a part in the circumferential direction. The color separation control circuit 104 controls the rotation and stop of the fluorescent wheel 112 to switch the number of colors incident on the display panels 113 and 114 in one frame period of the display panels 113 and 114.

The projector 1a (projection type display system 10a) of the present embodiment does not change the minimum lighting period and the control unit time as compared with the conventional projection using only one projector, but the B light The maximum lighting time at the maximum gradation becomes longer. Therefore, it is possible to control the brightness of one frame with respect to the gradation property to be close to the ideal, and the gradation property is improved.

Next, the projector (projection type display device) according to the third embodiment of the present invention will be described. The projector of this embodiment is different from the projector 1a of Example 2 in that it has a fluorescent wheel 112a instead of the fluorescent wheel 112. Since other configurations of the projector of this embodiment are the same as those of the projector 1a described in the second embodiment with reference to FIG. 9, their description will be omitted.

FIG. 15 is an explanatory view of the fluorescent wheel 112a in this embodiment. The fluorescent wheel 112a has a wheel shape, and has, for example, a fluorescent region (Y) that converts B light into a Y color and a region (C) that transmits B light as it is on the circumference. Here, it is assumed that the period for transmitting B light as it is is shorter than the period for converting to Y color.

By irradiating the position 221 on the circumference of the fluorescent wheel 112a rotating at an integral multiple of the frame frequency with the light of the light source 110, Y light (yellow) and B light can be obtained within one frame. In the optical system 115, B light and R light constituting Y light are incident on the display panel 113, and G light constituting Y light is incident on the display panel 114. The panel drive circuit 105 modulates the display panel 113 for each period of R light and G light, and the panel drive circuit 106 modulates the display panel 114 for each period of G light according to the gradation value of each color of each pixel. The optical system 115 projects an image on the screen 901 by incidenting the modulated light from the display panels 113 and 114 on the projection optical system 116.

FIG. 16 is an explanatory diagram of control at the time of stack projection, and shows the control of the light source 110, the fluorescent wheel 112a, and the display panels 113 and 114 for each of the projectors 1a and 2a, and the state of the projected light obtained by the control. Shown. Within the period of the obtained R light and B light incident on the display panel 113, the time corresponding to the gradation value of each pixel R and B of the display panel 113 is lit. Similarly, within the period of the obtained G light incident on the display panel 114, the time corresponding to the gradation value of each pixel G of the display panel 114 is lit.

FIG. 17 is an explanatory view of the fluorescent wheel of the projector 1a. FIG. 18 is an explanatory view of the fluorescent wheel of the projector 1b. As shown in FIG. 17, the projector 1a is configured so that the light of the light source 110 irradiates the position 222 on the circumference of the fluorescent wheel 112a where only the region for converting to Y color exists. As shown in FIG. 18, the projector 2a is configured so that the light of the light source 110 irradiates the position 223 on the circumference of the fluorescent wheel 112a where only the region where the B light is transmitted as it is exists.

As described above, in the present embodiment, the color light generating means 124a has a light source 110 and a fluorescence wheel 112a in which a region for converting the color of the incident light from the light source 110 is arranged in a part in the circumferential direction. The color conversion ratio of the fluorescent wheel 112a differs depending on the diameter. The color separation control circuit 104 switches the number of colors incident on the display panels 113 and 114 in one frame period of the display panels 113 and 114 by controlling the radial position of the incident light incident on the fluorescent wheel 112a.

The projector 1a (projection type display system 10a) of the present embodiment does not change the minimum lighting period and the control unit time as compared with the conventional projection using only one projector, but the B light The maximum lighting time at the maximum gradation becomes longer. Therefore, it is possible to control the brightness of one frame with respect to the gradation property to be close to the ideal, and the gradation property is improved.

Further, it is desired to correct the color shift that occurs at this time. Therefore, in this embodiment, the color separation control circuit 104 controls the amount of light without changing the lighting time of the light source 110. For example, when the light source 110 of the projector 2a is a laser light source, the gradation is improved by controlling the amount of light by controlling the output of the light source 110 without changing the lighting time of the light source 110 of one frame. It is possible to correct the color shift. Preferably, the color separation control circuit 104 controls the amount of light according to the number of colors incident on the display panels 113 and 114 of the color light generation means 124a. If the period of the Y color of the fluorescent wheel 112a and the period of B are 1: 4, the amount of light of the light source 110 of B may be reduced to 1/4.

Further, in this embodiment, the projection type display system 10a may be configured by using three or more projectors. In this case, the number of projectors that project B light and projectors that project R light and G light is optimized (optimized) from the ratio of the Y color period and the B period of the fluorescent wheel 112 by means of mutual communication or the like. It is desirable to be controlled so as to. In this embodiment, preferably, the color separation control circuit 104 determines the control of the amount of light according to the projected color and the number of projected lights. The control of the amount of light can be determined based on the instruction signal acquired through the user's operation or communication.

Normally, color-sequential projectors are based on the premise that the colors that make up one frame overlap in the same place on the retina, and the colors that make up the retina appear separately the moment the viewpoint is moved according to the movement of the image. The cracking phenomenon is visually recognized. On the other hand, according to the projector of the present embodiment, it is possible to reduce the visibility of the color cracking phenomenon.

Next, the projector (projection type display device) according to the fourth embodiment of the present invention will be described with reference to FIG. FIG. 19 is a configuration diagram of the projector 1b. The projector 1b of the present embodiment is different from the projector 1 of the first embodiment described with reference to FIG. 1 in that it has the color light generation means 124b instead of the color light generation means 124. Since the other configurations of the projector 1b are the same as those of the projector 1, the description thereof will be omitted.

The color light generating means 124b has light sources 108, 109, 110. The light sources 108, 109, and 110 time-divide one frame and inject light of different colors into the display panel 113 via the optical system 115. With such a configuration, full-color display is possible on one display panel 113. This method is generally called a color sequential method.

The panel drive circuit 105 modulates the display panel 113 according to the gradation value of each color of each pixel for each period of R light, G light, and B light. The optical system 115 projects an image on the screen 901 by incidenting the modulated light from the display panel 113 on the projection optical system 116.

FIG. 20 is an explanatory diagram of control at the time of normal projection, and shows the control of the light sources 108, 109, 110 and the display panel 113, and the state of the projected light obtained by the control. Within the period of each of the obtained R light, G light, and B light incident on the display panel 113, it is controlled to light the time corresponding to each color gradation value of each pixel of the display panel 113. In general, as shown in FIG. 20, the case where the light is turned on for the entire period of each color period is set as the maximum gradation, and by controlling the ratio of turning off and turning on during that period, the display brightness integrated for one frame time visually is displayed. Is controlled so as to have a target brightness according to the gradation value. As a result, as shown in FIG. 20, one frame of full-color projected light is obtained, and by executing this for each frame of the input signal, the input image is projected.

FIG. 21 is an explanatory diagram of control at the time of stack projection, and controls the light sources 108, 109, 110, and the display panel 113 for each of the projectors 1b, 2b, and 3b constituting the projection type display system of this embodiment. And the state of the projected light obtained by it is shown. This control can be performed by instructing the operation of the operation panel 122 or the remote controller 123 or by communication means, or the stack projection may be detected by detecting the projection surface or the like. For example, the projector 1b controls the light source 108 to be constantly turned on and the light sources 109 and 110 to be constantly turned off. Similarly, the projector 2b controls the light sources 109 to be constantly turned on and the light sources 108 and 110 to be constantly turned off, and the projector 3b controls the light sources 110 to be constantly turned on and the light sources 108 and 109 to be constantly turned off. As shown in FIG. 21, the panel drive circuit 105 has a maximum gradation when the light is turned on for each enlarged color light period, and by controlling the ratio of turning off and turning on during that period, it is visually 1 The display brightness integrated with the frame time is controlled to be the target brightness according to the gradation value.

As described above, in the present embodiment, the color light generating means 124b has a plurality of light sources 108, 109, 110 having different colors, and is configured to switch the color incident on the display panel 113 in a time-division manner. The color separation control circuit 104 switches the number of colors incident on the display panel 113 in one frame period of the display panel 113 by controlling the lighting and extinguishing of each of the plurality of light sources 108, 109, 110.

The projector 1b (projection type display system) of this embodiment does not change the minimum lighting period and the control unit time as compared with the conventional projection using only one projector, but the maximum for B light. The maximum lighting time during gradation becomes longer. Therefore, it is possible to control the brightness of one frame with respect to the gradation property to be close to the ideal, and the gradation property is improved. Further, according to the projector of the present embodiment, it is possible to reduce the visibility of the color cracking phenomenon.

According to each embodiment, it is possible to provide a projection type display device and a projection type display system having improved gradation during superimposed projection. Further, according to each embodiment, it is possible to reduce the visibility of the color cracking phenomenon.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various modifications and modifications can be made within the scope of the gist thereof.

1 Projector (projection type display device)
104 Color separation control circuit (control means)
105 Panel drive circuit (drive means)
113 Display panel (display element)
124 Color light generation means

Claims (10)

A display element that displays the input image and
A color light generating means capable of switching the color incident on the display element in a time-division manner, and
A driving means for driving the display element based on the input image and a driving means for each period of the color incident from the color light generating means.
A projection-type display device comprising a control means for controlling the color light generating means so as to switch the number of colors incident on the display element in one frame period of the display element. The colored light generating means includes a light source and a wheel in which a plurality of regions having different transmitted colors with respect to the incident light from the light source are arranged in the circumferential direction.
The wheel is provided with a plurality of regions having a predetermined width in the radial direction and different colors to be transmitted.
The first aspect of the present invention is characterized in that the control means controls the radial position of the incident light incident on the wheel to switch the number of colors incident on the display element in one frame period of the display element. The projection type display device described. The color light generating means includes a light source and a wheel in which a region for converting the color of incident light from the light source is arranged in a part in the circumferential direction.
The projection type display according to claim 1, wherein the control means switches the number of colors incident on the display element in one frame period of the display element by controlling the rotation and stop of the wheel. apparatus. The color light generating means includes a light source and a wheel in which a region for converting the color of incident light from the light source is arranged in a part in the circumferential direction.
The wheel has a different color conversion ratio depending on the diameter.
The control means according to claim 1, wherein the control means switches the number of colors incident on the display element in one frame period of the display element by controlling the radial position of the incident light incident on the wheel. The projection type display device according to 3. Any one of claims 2 to 4, wherein the control means rotates the wheel at an integral multiple of the frame frequency of the input image to switch the color incident on the display element in a time division manner. The projection type display device described in 1. The color light generating means has a plurality of light sources having different colors, and has a plurality of light sources.
It is configured to switch the color incident on the display element in a time-division manner.
The first aspect of the present invention is characterized in that the control means controls the lighting and extinguishing of each of the plurality of light sources to switch the number of colors incident on the display element in one frame period of the display element. The projection type display device described. The projection type display device according to any one of claims 2 to 6, wherein the control means controls the amount of light without changing the lighting time of the light source. The projection type display device according to claim 7, wherein the control means controls the amount of light according to the number of colors incident on the display element of the color light generation means. The projection type display device according to claim 7 or 8, wherein the control means determines the control of the amount of light according to the projection color to be projected and the number of projections. A projection display system equipped with multiple projection display devices.
A projection type display system according to any one of claims 1 to 9, wherein at least one of the plurality of projection type display devices is the projection type display device according to any one of claims 1 to 9.

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