WO2007000887A1 - Dispositif d’affichage - Google Patents

Dispositif d’affichage Download PDF

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Publication number
WO2007000887A1
WO2007000887A1 PCT/JP2006/311616 JP2006311616W WO2007000887A1 WO 2007000887 A1 WO2007000887 A1 WO 2007000887A1 JP 2006311616 W JP2006311616 W JP 2006311616W WO 2007000887 A1 WO2007000887 A1 WO 2007000887A1
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WO
WIPO (PCT)
Prior art keywords
light
color
image
modulation element
light source
Prior art date
Application number
PCT/JP2006/311616
Other languages
English (en)
Japanese (ja)
Inventor
Kei Tokui
Original Assignee
Sharp Kabushiki Kaisha
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Kabushiki Kaisha filed Critical Sharp Kabushiki Kaisha
Publication of WO2007000887A1 publication Critical patent/WO2007000887A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3102—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators
    • H04N9/3111—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources
    • H04N9/3114—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM] using two-dimensional electronic spatial light modulators for displaying the colours sequentially, e.g. by using sequentially activated light sources by using a sequential colour filter producing one colour at a time
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/20—Lamp housings
    • G03B21/206—Control of light source other than position or intensity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00—Details of colour television systems
    • H04N9/12—Picture reproducers
    • H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141—Constructional details thereof
    • H04N9/315—Modulator illumination systems

Definitions

  • the present invention relates to a display device that displays light modulated by a light modulation element by irradiating the light modulation element with light from a light source.
  • the present invention relates to a device using an element capable of controlling independent emission of a plurality of emission colors as a light source.
  • a type display device As the light modulation element, an element using liquid crystal, a DMD (Digital Micromirror Device) equipped with a micromirror array, or the like is used.
  • a light source As a light source, ultra-high pressure mercury lamps are widely used.
  • LEDs Light Emitting Diodes
  • LED power Light emitted from a modulation element such as a DMD is irradiated, and the modulated light is enlarged and projected onto a screen by a projection lens.
  • a modulation element such as a DMD
  • One image is displayed in color by continuously displaying three images, a red image, a green image, and a blue image.
  • the LED only emits a red LED.
  • a green LED is emitted for a green image
  • a blue LED is emitted for a blue image.
  • a color image having primary colors of red, green, and blue is displayed. Since LEDs have a longer life than ultra-high pressure mercury lamps, the life of projection display devices can be extended by using LEDs as a light source.
  • Patent Document 1 Japanese Patent Laid-Open No. 11-32278
  • the present invention has been made in view of the above problems, and its object is to use a light modulation element that requires scanning of a scanning line in order to express gradation by pixels. However, it is to provide a display device that does not reduce the brightness of the display image. Means for solving the problem
  • a color image display is performed by performing display as an image, and a light modulation element having a period of simultaneously displaying at least a first color image and a second color image of the image, and the light source
  • a light selection unit that selects light emitted by the light modulation element in a period in which the display of the first color image and the display of the second color image are performed simultaneously.
  • a color image display, and a light modulation element having a scanning period for scanning from a state in which at least a first color image is displayed to a state in which a second color image is displayed, and the light source A light selection unit for selecting light, wherein the light modulation element irradiates a region displaying the first color image of the light modulation element in the scanning period;
  • a light selection unit that selects light so that the region displaying the second color image is irradiated with the second color light, and a state in which the first color image is displayed.
  • a special display device is provided.
  • a first light source that emits light of a first color
  • a second light source that emits light of a second color
  • a third light source that emits light of a third color.
  • a light source and a light modulation element that displays an image by modulating light emitted from the light source, and displays a color image by displaying a color image to be displayed as an image of a plurality of colors.
  • a light selection element that selects light emitted from the light source, and displays an image of the first color of the light modulation element in the first scanning period.
  • the region where the first color light is irradiated to the region, and the second color image of the light modulation element is displayed.
  • the light is selected to irradiate the second color light, and the second color image of the light modulation element is displayed in the second scanning period, and the second color light is applied to the region.
  • a controller that controls the light source to emit light from the first light source and the second light source, and to emit light from the second light source and the third light source in the second scanning period.
  • a display device is provided.
  • the light modulation element has a third scanning period for scanning from a state of displaying a third color image to a state of displaying a first color image
  • the light selection unit includes: During the third scanning period, an image of the third color of the light modulation element is displayed, the third color light is irradiated to the area, and the first color of the light modulation element is irradiated.
  • the light is selected so as to irradiate the region displaying the image with the first color light, and the control unit emits the third light source and the first light source in the third scanning period. It is preferable to control the light source.
  • the light modulation element has a fourth scanning period for scanning from a state of displaying a third color image to a state of displaying a fourth color image
  • the light selection unit includes: During the fourth scanning period, an image of the third color of the light modulation element is displayed, the third color light is irradiated to the area, and the fourth color of the light modulation element is irradiated. Display the image and irradiate the area with the fourth color light
  • the control unit controls the light source to emit two types of light sources of the first light source, the second light source, and the third light source in the fourth scanning period. It is preferable to do.
  • the light modulation element has a fourth scanning period for scanning from a state of displaying a third color image to a state of displaying a fourth color image
  • the light selection unit includes: During the fourth scanning period, an image of the third color of the light modulation element is displayed, the third color light is irradiated to the area, and the fourth color of the light modulation element is irradiated. An image is displayed and light is selected so as to irradiate the region with the fourth color light, and the control unit is configured to select the first light source, the second light source, and the second light source in the fourth scanning period. It is preferable to control to emit three light sources.
  • a fifth light source that emits light of a fifth color and a fifth scan in which the light modulation element performs a scan from a state of displaying a third color image to a state of displaying a fifth color image
  • the light selection unit displays an image of the third color of the light modulation element in the fifth scanning period, and irradiates the region with the light of the third color. Light is selected so as to irradiate the fifth color light onto the region displaying the fifth color image of the modulation element, and the control unit is configured to select the third light source and the light source in the fifth scanning period. It is preferable to perform control to emit light from the fifth light source.
  • the light modulation element displays a sixth scanning period in which scanning is performed from a state in which a third color image is displayed to a state in which a second color image is displayed, and a second color image is displayed.
  • the image is displayed so that the third color light is irradiated to the region, the second color image of the light modulation element is displayed, and the second color light is irradiated to the region.
  • the light is selected, and in the seventh scanning period, the second color image of the light modulation element is displayed, the second color light is irradiated to the region, and the first color of the light modulation element is displayed.
  • the light is selected so as to irradiate the region displaying the image of the first color with light of the first color, and the control unit emits the third light source and the second light source in the sixth scanning period.
  • this performs control for emitting a first light source and the second light source is preferred.
  • the light selection unit transmits a filter that transmits only light of the first color, and transmits only light of the second color. It is preferable that the color wheel includes a filter that passes through and a filter that transmits only the light of the third color.
  • the light selection unit includes a filter that transmits only the first color light, a filter that transmits only the second color light, a filter that transmits only the third color light, It is preferable that the color wheel includes a filter that transmits two kinds of light of the first color light, the second color light, and the third light.
  • the light selection unit includes a filter that transmits only the first color light, a filter that transmits only the second color light, and a filter that transmits only the third color light. It is preferable that the color wheel includes a region that transmits light of the above-described color.
  • the light selection unit is a color wheel including a filter that transmits light of the first color and light of the third color and a filter that transmits light of the third color.
  • the second color light is green light.
  • the light source emits only a light source that emits a color corresponding to an image displayed by the light modulation element.
  • the light modulation element has a period for displaying only one color image of the light emission color of the light source, and the light source has a period for displaying only one color image. It is preferable that only the light source that emits light corresponding to the displayed image emits light.
  • the light selection unit includes a filter that transmits only light of the first color, a filter that transmits only light of the second color, and a filter that transmits only light of the third color. It is preferable that the color wheel has a region that transmits light of all colors in at least one region of the filter.
  • n light sources having different emission colors a light selection unit that selects light emitted from the light source, and light that displays an image by modulating light emitted from the light source.
  • the light modulation element displays a color image by displaying an image of at least n colors, and displays an nth color image and an n ⁇ 1th color image.
  • the light selection unit is configured to display the nth color image and the n ⁇ 1th color image at the same time.
  • the n-th color image is displayed by irradiating the n-th color light onto the area where the n-th color image is displayed!
  • the eye color image is displayed, and the light is selected so as to irradiate the nth-first color light to the region, and the light source displays the n-th color image and the nth color image.
  • a display device comprising: n light sources having different emission colors; a light selection unit that selects light emitted from the light source; and a light modulation element that displays an image by modulating light emitted from the light source.
  • the light modulation element displays a color image by displaying an image of at least n colors, and displays an image of the nth color and an image of the n ⁇ 1st color.
  • the light selection unit is in the period in which the display of the nth color image and the display of the n ⁇ 1st color image are simultaneously performed.
  • the area displaying the nth color image of the child is irradiated with the nth color light, and the nth-1st color image of the light modulation element is displayed.
  • n select light to emit light of the first color
  • the light source displays an image of the nth color
  • n Provided a display method characterized by emitting only the light source emitting the nth color and the light source emitting the n-1st color during the period in which the display of the first color image is performed simultaneously It is done.
  • a color image display, and a light modulation element having a period of simultaneously displaying at least a first color image and a second color image among the plurality of color images, and the light source A light selection unit that selects light, wherein the first color image of the light modulation element is displayed in a period in which the display of the first color image and the display of the second color image are performed simultaneously. Irradiating the region displaying the first color light, displaying the second color image of the light modulation element, and irradiating the second color light to the region
  • a display device including a light selection unit that selects light.
  • the display device of the present invention even when a plurality of light sources having different emission colors are provided, a desired color of light is selectively emitted to a desired region of the light modulation element in the light selection unit. It is possible to prevent color mixing, and even when the light modulation element displays an image of a plurality of colors, it is possible to obtain a bright and display image even by emitting light from the light source.
  • the display device of the present invention it is possible to reduce power consumption by emitting a light source corresponding to the color of an image displayed by the light modulation element and turning off the other light sources.
  • the light modulation element displays an image corresponding to a color obtained by mixing a plurality of emission colors among the emission colors of the plurality of light sources, and simultaneously emits the plurality of emission colors.
  • the display image can be brightened.
  • the display device of the present invention it is possible to provide a large number of light sources that emit light of primary colors, and the color reproduction range can be easily expanded.
  • the image display period corresponding to the light source of the luminescent color that requires the most light amount when the light amount of the light source of each luminescent color is different such as adjusting the white point.
  • the filter corresponding to the color of the image displayed by the light modulation element can prevent color mixture of light irradiation to the light modulation element, and can be performed during the scanning period of the light modulation element.
  • Image display is possible, bright images can be obtained, and color breaks can be reduced by switching images at high speed.
  • the display device of the present invention it is possible to select light by using a type of filter that has fewer light emission colors than the plurality of light sources, thereby improving the yield of the light selection unit and reducing the cost. Is possible.
  • the display device of the present invention when the white point is adjusted by making the green display time longer than other colors, the light emission intensity of the light source of each emission color can be output to the maximum. It is possible to obtain images with high efficiency and brightness.
  • the display device of the present invention by providing a region that transmits all colors between the filters in the light selection unit, the transmittance is improved by not transmitting the filter, and the efficiency is improved. Bright, it is possible to obtain an image.
  • FIG. 1 is a diagram showing a schematic configuration example of a display device according to a first embodiment of the present invention.
  • FIG. 2 is a diagram showing an example of color wheel filter arrangement in the display device according to the present embodiment.
  • FIG. 3 is a diagram showing a state of an LCOS display image of the display device according to the present embodiment.
  • FIG. 4 is a diagram showing LED light emission timings in the display image state of the LCOS of the display device according to the present embodiment.
  • FIG. 5 is a diagram showing another example of the filter arrangement of the color wheel of the display device according to the present embodiment.
  • FIG. 6 is a diagram showing another example of the filter arrangement of the color wheel in the display device according to the present embodiment.
  • FIG. 7 is a diagram showing another example of the filter arrangement of the color wheel of the display device according to the present embodiment.
  • FIG. 8 is a diagram showing an example of a filter arrangement of a color wheel in a display device according to a second embodiment of the present invention.
  • FIG. 9 is a diagram showing a state of an LCOS display image of the display device according to the present embodiment.
  • FIG. 10 is a diagram showing LED light emission timings in the display image state of the LCOS of the display device according to the present embodiment.
  • FIG. 11 is a diagram showing a state of a display image of LCOS according to the third embodiment of the present invention.
  • FIG. 12 is a diagram showing LED light emission timings in the display image state of the LCOS of the display device according to the present embodiment.
  • FIG. 13 is a diagram showing an example of filter arrangement of a color wheel of a display device according to a fourth embodiment of the present invention.
  • FIG. 14 is a diagram showing another example of the filter arrangement of the color wheel of the display device according to the present embodiment.
  • FIG. 15 is a diagram showing a state of an LCOS display image of the display device according to the present embodiment.
  • FIG. 16 is a diagram showing LED light emission timing in the LCOS display image state in the fourth embodiment.
  • FIG. 17 shows a filter arrangement of a color wheel of a display device according to a fifth embodiment of the present invention. It is a figure which shows the example of.
  • FIG. 18 is a diagram showing another example of the filter arrangement of the color wheel in the fifth embodiment.
  • FIG. 1 is a diagram showing a schematic configuration of a display device according to Embodiment 1 of the present invention.
  • R-LED101 that emits red light
  • G-LED102 that emits green light
  • B-LED103 that emits blue light
  • LCOS 104 Liquid
  • the polarization beam splitter 105 transmits P-polarized light and reflects S-polarized light. Therefore, in the present embodiment, the light incident on the polarization beam splitter 105 is incident on the S-polarized light power LCOS 104.
  • the light incident on the LCOS 104 is modulated by the liquid crystal and is incident on the polarization beam splitter 105 again. For example, when modulated to P-polarized light by the LCOS 104, the light passes through the polarization beam splitter 105, and is incident on the projection lens 106 and projected onto a screen or the like.
  • Two types of dichroic mirrors are arranged in the light propagation path of light from each LED.
  • B dichroic mirror 107 is a dichroic mirror that reflects blue light and transmits green light.
  • R dichroic mirror 108 reflects red light and transmits green and blue light. This is a dichroic mirror having the following characteristics. Accordingly, the green light emitted from the G-LED 102 is reflected by the mirror 109 and passes through the B dichroic mirror 107. The blue light emitted from the B-LED 103 is reflected by the B dichroic mirror 107. That is, the directional light from the B dichroic mirror 107 to the R dichroic mirror 108 is transmitted green light and reflected blue light. In the R dichroic mirror 108, the mixed light of blue and green is transmitted, and the red light emitted from the R-LED 101 is reflected. That is, light traveling from the R dichroic mirror 108 toward the color wheel 100 becomes red light, green light, and blue light.
  • the control unit 10 can be composed of a general-purpose microcomputer, LCOS dry LED, LED driver, etc., and controls the color wheel 100 used as the light selection unit, controls the LCOS 104, and controls the light emission timing of the LEDs 101 to 103. To do.
  • the scanning start timing of the LCOS 104, the light emission start timing and the turn-off timing of the LEDs 101 to 103 are controlled by a signal obtained by detecting the state of the color wheel 100 by the light sensor 110.
  • the color wheel 100 has a dichroic filter arrangement as shown in FIG. 2 and transmits red light and does not transmit green and blue light. ⁇ ⁇ ⁇ ⁇ R filter 111 and green light are transmitted.
  • the G filter 112 that does not transmit red and blue light and the B filter 113 that transmits blue light but does not transmit red and green light are configured.
  • the ratio of the area of each filter occupying the color wheel may be arbitrarily changed according to the balance of light to be projected, which need not be the same.
  • the color wheel 100 When the light from the LED passes through the color wheel 100 and illuminates the LCOS 104, the color wheel so that the boundary line formed by the boundary of each filter and the scanning line of the LCOS 104 are substantially the same location. 100 drive and LCOS 104 scan timing are controlled. In addition, when the LCOS 104 displays an image for red, control is performed so that an R filter that transmits red light is disposed at a position where the light from each LED transmits through the color wheel. As shown in Fig. 3, the LCOS104 displays a red image (a), a scanning state for writing a green image (b), and a green image. (c), the state being scanned to write the blue image (d), the state displaying the blue image (e), and the state being scanned to write the red image (f) The above six states are repeated, and the colors are displayed by multiplying and mixing the colors over time.
  • the relationship between the LCOS 104 and the color wheel 100 filter is as follows.
  • the R filter 111 is arranged on the optical path from the LED
  • the R filter 111 and the G filter 112 are arranged on the optical path from the LED.
  • the G filter 112 is arranged on the optical path from the LED.
  • the G filter 112 and the B filter 113 are arranged on the optical path from the LED.
  • the B filter 1 13 is placed on the optical path from the LED
  • the state (f) the B filter 113 and the R filter 111 include the boundary on the optical path from the LED. It is controlled to be arranged in.
  • the R-LED10 ⁇ G-LE D102 can emit light and the B-LED can be turned off.
  • the transmitted light is limited by the force color wheel 100 that causes the red and green light to be applied to the LCOS 104, it is possible to separate the irradiation areas of the red light and the green light.
  • the G-LED 102 and the B-LED 103 can emit light and the R-LED 101 can be turned off.
  • the state (f) only red and blue light is required, so the R-LED 101 and the B-LED 103 can emit light and the G-LED 102 can be turned off.
  • FIG. 4 shows the light emission timing of each LED. That is, (a) emits R-LED101, (b) emits R-LED101 and G-LED102, (c) emits G-LED102, (d) emits G-LED102 and B-LED103, (E) emits B—LED 103, and (f) emits R—LED 101 and B—LED 103. Therefore, unlike the light emitting method described above, it is not necessary to emit light, and it is possible to reduce power consumption by turning off the LED at an appropriate timing.
  • FIG. (b), (d), and (f) can also make the LED emit light and display the brightness! / image.
  • the reflection type LCOS has been described as the light modulation element, but an element such as a transmissive liquid crystal panel can be used.
  • an element such as a transmissive liquid crystal panel can be used.
  • it is possible to improve the contrast by placing polarizing plates before and after the polarizing beam splitter.
  • the light utilization efficiency may be improved by appropriately disposing lenses, or the light utilization efficiency may be improved by using a deflection conversion element.
  • a semiconductor laser or EL element can be used as the light source.
  • the same effect can be obtained when the LCO S 104 is arranged so that the force of irradiating the LCOS 104 with the S-polarized light and the LCO S 104 with the P-polarized light.
  • the color wheel shown in FIG. 5 has an R filter, a G filter, and a B filter arranged in two places each! Even when this color wheel is used, the LCOS display is as shown in FIG. 3, so the light emission timing of each LED is the same as in FIG. 4, and the effects of the present invention can be obtained. Furthermore, the color wheel shown in Fig. 6 transmits red, green, and blue light by reflecting or absorbing red, green, and blue light at the boundary with each filter of the color wheel 100 in Fig. 3.
  • the power described for the three primary color display using red, green and blue as primary colors is applicable to the display of two or more colors.
  • R-LE D and B—LED when using G1—LED that emits green light from a long wavelength and G2—LED that emits green light from a short wavelength, A force wheel as shown in Fig. 7 may be used.
  • the color wheel in FIG. 7 includes a G1 filter 115 that transmits green light having a longer wavelength and a G2 filter 116 that transmits green light having a shorter wavelength. Yes.
  • the Gl— LED is emitted.
  • the G2— LED is emitted.
  • the effect of this embodiment can be obtained by controlling the LED emitting light that is not related to the display image of the LCOS 104 to be turned off.
  • a display device that can improve power consumption by turning on only the light source that emits light according to the image of the color displayed by the light modulator and turning off the light source that emits light of other colors Can be obtained.
  • the schematic configuration of the display device according to the present embodiment can be described with reference to FIG. 1, as in the first embodiment.
  • a color wheel with a filter arrangement as shown in Fig. 8 is used.
  • the color wheel shown in FIG. 8 includes a Y filter 201 in addition to an R filter 111, a G filter 112, and a B filter 113.
  • the Y filter 201 has a filter characteristic that transmits red and green light and does not transmit light of other colors. Therefore, the image display state of LCOS 104 is set to 8 states of (a) to (h) in FIG.
  • Y indicates that the LCOS 104 displays red and green images, that is, a yellow image.
  • the light emission state of the light source causes the R-LED 101 and the G-LED 102 to emit light, and the B-LED 103 is turned off. Light emitted from the R—LED 101 and the G—LED 102 is transmitted through the power filter 201 of the power wheel and irradiates the LCOS 104.
  • the relationship between the LCOS and the color wheel filter is as follows.
  • the R filter 111 is arranged on the optical path from the LED
  • the R filter 11 1 and Y are arranged on the optical path from the LED.
  • the Y filter 201 is arranged on the optical path from the LED
  • the Y filter 201 and the G filter 112 are arranged on the optical path from the LED.
  • the G filter 112 is arranged on the optical path from the LED.
  • the G filter 112 and the B filter 113 are arranged on the optical path from the LED.
  • B filter 113 In state (g), B filter 113 is placed on the optical path from the LED, and in state (h), B filter 113 and R filter 111 are placed on the optical path from the LED. To be controlled. This allows the color wheel filter to separate the light of each color and irradiate the LCOS with light.
  • the LCOS in the states (b), (d), (f), (h) Since light can be irradiated even during image scanning, a bright display image can be obtained.
  • FIG. 10 is a diagram showing the light emission timing of the LED in each state of FIG.
  • R-LED 101 emits light
  • G—LED 102 emits light when a green image is displayed
  • B—LED 103 emits when LCOS displays a blue image.
  • the R-LED 101 and the G-LED 102 emit light in the states (b) and (d) when the LCOS is scanning.
  • the Y filter 201 should not be arranged, and a color filter must be arranged so that all colors of light can be transmitted. The same effect can be obtained. As a result, the light transmittance in the filter can be improved, the light utilization efficiency can be improved, and a bright image can be obtained.
  • the LCOS104 yellow image is displayed as a white image, and when the R-LED 101 and G-LED102 are emitted, B-LE D By emitting light as well, it is possible to obtain a white display in contrast to red, green and blue.
  • color mixing of light is prevented by controlling the rotation of the color wheel and the scanning timing of the light modulation element, and the light modulation element irradiates light even during scanning of the display image.
  • the brightness of the displayed image can be improved, and only the light source that emits light corresponding to the color image displayed by the light modulation element is emitted, and the light source that emits light of other colors is turned off.
  • By adding a yellow or white display image as much as possible it is possible to display a bright image and obtain a display device with improved gradation expression.
  • the schematic configuration of the display device according to the present embodiment can be described with reference to FIG. 1, as in the first embodiment.
  • the light emitted from R—LED101, G—LED102, and B—LED103 is mixed to create white light (for example, D65)
  • white light for example, D65
  • There is a magnitude relationship in the area ratio of the filter for example, R fill
  • the area ratio of the filter 111, the G filter 112, and the B filter 113 is about 1: 2: 1.
  • the image display state of the LCO S 104 is the state (c) in which only the green image is displayed with the largest ratio, and red and blue are displayed only when the LCOS 104 is scanning. It is.
  • the relationship between the LCOS 104 and the color wheel 100 filter is such that, in the state (a), the B filter 113 and the R filter 111 are arranged on the optical path from the LED so as to include the boundary. In the state (c), the R filter 111 and the G filter 112 are arranged so as to include the boundary.In the state (c), the G filter 112 is arranged on the light path from the LED. The G filter 112 and the B filter 113 are controlled so as to include the boundary on the optical path.
  • light of each color can be separated by the color wheel filter to irradiate the LCOS, and the LCOS in each of the states (a), (b), and (d) can be illuminated even during image scanning. Therefore, a bright display image can be obtained. Furthermore, an image of an arbitrary color can be displayed only during scanning, and the image can be switched at high speed, and color breaks can be reduced.
  • FIG. 12 is a diagram showing the light emission timing of the LED in each of the states (a) to (d) shown in FIG.
  • the LCOS is displaying a red image
  • the R—LED 101 is lit
  • the LCO S is displaying a green image
  • the G-LED 102 is lit
  • the LCOS is displaying a blue image.
  • B—LED 103 emits light.
  • color mixing of light is prevented by controlling the rotation of the color wheel and the scanning timing of the light modulation element, and light is emitted even when the light modulation element is scanning the display image.
  • the brightness of the displayed image can be improved, and only the light source that emits light according to the color image displayed by the light modulation element is emitted, and the light sources that emit light of other colors are turned off.
  • Arbitrary color images that just reduce power consumption Can be displayed only during scanning, and the image can be switched at high speed, reducing the power error break.
  • the color to be displayed alone may be red or blue.
  • this embodiment it is possible to display only all the colors during scanning without any single display color.
  • two colors that can be displayed individually are acceptable. For example, the same effect can be obtained even when green and blue can be displayed independently.
  • FIG. 15 shows a case where all the image display states of the LCOS 104 are displayed during scanning.
  • the green image scanning represented by the state (d) is started. That is, in this embodiment, the green image display period is provided twice.
  • the relationship between the LCOS 104 and the color wheel filter is such that, in the state (a), the G filter 112 and the R filter 111 are arranged on the optical path from the LED, and in the state (b), the LED is in the state.
  • the R filter 111 and the G filter 112 are arranged so as to include a boundary on the optical path from the side, and in the state (c), the G filter 112 and the B filter 113 are arranged so as to include the boundary on the optical path from the LED.
  • the B filter 113 and the G filter 112 are controlled so as to include the boundary on the optical path from the LED.
  • the color wheel The light of each color can be separated by the filter, and the LCOS can be irradiated with light.
  • the LCOS in the states (a), (b), (c), and (d) can irradiate light even during image scanning. Therefore, a bright display image can be obtained.
  • color breaks can be reduced by displaying the green image twice.
  • FIG. 16 is a diagram showing the light emission timing of the LED in each of the states (a) to (d) shown in FIG.
  • the LCOS is displaying a red image
  • the R—LED 101 is lit
  • the LCO S is displaying a green image
  • the G-LED 102 is lit
  • the LCOS is displaying a blue image.
  • B—LED 103 emits light.
  • color mixing of light is prevented by controlling the rotation of the color wheel and the scanning timing of the light modulation element, and light is emitted even when the light modulation element is scanning the display image.
  • the brightness of the displayed image can be improved, and only the light source that emits light according to the color image displayed by the light modulation element is emitted, and the light sources that emit light of other colors are turned off.
  • Color breaks can be reduced by displaying an image of any color twice, as well as being able to reduce power consumption.
  • green is displayed twice, and the R filter 111 and the B filter 113 are arranged between the G filters 112, so there is no need to consider the color mixture of red and blue. . Therefore, a color wheel as shown in FIG. 14 can be used.
  • the M filter 202 is used instead of the R filter 111 and the B filter 113.
  • the M filter 202 has a characteristic of transmitting red and blue light and not transmitting green light. This makes it possible to use two types of color filters for the color wheel, which is preferable because it reduces the number of processes during the production of the color wheel and improves the yield.
  • the glass with the G filter 112 formed and the glass with the M filter 202 formed are produced, and the color wheel is produced by bonding these two types of glass together. It becomes possible to do. At this time, the deposition surfaces are bonded together It is preferable that the incident positions of light on the film forming the filter can be made substantially the same.
  • the color wheel including the M filter 202 and the G filter 112 can also be applied to display using four primary colors.
  • the G filter 112 can transmit green light having a longer wavelength and green light having a shorter wavelength, so that red, green having a longer wavelength, green having a shorter wavelength, The four primary colors of blue can be realized, and display with an expanded color reproduction range is possible.
  • FIG. 17 The schematic configuration of the display device according to the present embodiment can be described with reference to FIG. 1 as in the first embodiment.
  • the color wheel with the filter arrangement shown in Fig. 17 is used.
  • the color wheel shown in FIG. 17 is a W region that transmits light of all colors by disposing no color filter among the filters of the color wheel 100 shown in FIG.
  • the display state of LCOS 104 is the same as in FIG. 3, and the light emission timing of each color LED in each state of FIG. 3 is the same as in FIG.
  • the relationship between the LCOS 104 and the color wheel filter is that the G filter 112 and the R filter 111 are placed on the optical path from the LED in the state (b), and the light from the LED in the state (d).
  • B filter 113 and G filter 112 are placed on the road so as to include the boundary.
  • In state (f) R filter 111 and B filter 113 are placed on the optical path of the LED force so as to include the boundary.
  • the force states (a), (c), and (e) which are the same as those in form 1, control is performed so that the W region is arranged on the optical path of the LED force.
  • the force of providing the W region 203 in all the filters of the R filter 111, the G filter 112, and the B filter 113 can be provided at any location, for example, as shown in FIG.
  • the W region only in the G filter 112 the efficiency when green light passes through the W region is improved, and a bright display image can be obtained. Therefore, according to the present embodiment, the color wheel rotation and the scanning timing of the light modulation element are controlled to prevent light color mixing, and light can be emitted even when the light modulation element is scanning the display image.
  • the brightness of the displayed image can be improved, and only the light source that emits light according to the color image displayed by the light modulation element is emitted, and the light sources that emit light of other colors are turned off.
  • providing a transparent area on the color wheel can improve light utilization efficiency and provide a bright display image.
  • the present invention can be used as a display device.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Liquid Crystal Display Device Control (AREA)

Abstract

L’invention concerne un dispositif d’affichage produisant une image lumineuse avec une consommation réduite d’énergie. Parmi une pluralité de sources de lumière (101, 102, 103), une source de lumière ayant une couleur d’émission qui correspond à la couleur d’une image affichée par un élément de modulation de lumière (104) est autorisée à émettre de la lumière. L’image possédant deux couleurs ou plus affichées par l’élément de modulation de lumière (104) est irradiée séparément de différentes couleurs par la section de sélection de lumière (100).
PCT/JP2006/311616 2005-06-29 2006-06-09 Dispositif d’affichage WO2007000887A1 (fr)

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JP2005189803 2005-06-29
JP2005-189803 2005-06-29

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WO2007000887A1 true WO2007000887A1 (fr) 2007-01-04

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008276209A (ja) * 2007-03-30 2008-11-13 Toshiba Corp ディスプレイの照明装置
WO2009069010A1 (fr) * 2007-11-28 2009-06-04 Koninklijke Philips Electronics N.V. Système d'éclairage, procédé et dispositif de projection pour commander une lumière émise pendant une période de temps de rayon
JP2012203344A (ja) * 2011-03-28 2012-10-22 Casio Comput Co Ltd 光源ユニット及びプロジェクタ

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10186311A (ja) * 1996-12-24 1998-07-14 Sony Corp シーケンシャルカラーディスプレイ装置
JP2001202057A (ja) * 2000-01-21 2001-07-27 Mitsubishi Electric Corp 画像表示装置および画像表示方法
JP2003179940A (ja) * 2001-12-13 2003-06-27 Nippon Hoso Kyokai <Nhk> 撮像装置及びこれを用いた表示システム
JP2004045989A (ja) * 2002-07-15 2004-02-12 Casio Comput Co Ltd 投影型表示装置及びその表示駆動方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10186311A (ja) * 1996-12-24 1998-07-14 Sony Corp シーケンシャルカラーディスプレイ装置
JP2001202057A (ja) * 2000-01-21 2001-07-27 Mitsubishi Electric Corp 画像表示装置および画像表示方法
JP2003179940A (ja) * 2001-12-13 2003-06-27 Nippon Hoso Kyokai <Nhk> 撮像装置及びこれを用いた表示システム
JP2004045989A (ja) * 2002-07-15 2004-02-12 Casio Comput Co Ltd 投影型表示装置及びその表示駆動方法

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008276209A (ja) * 2007-03-30 2008-11-13 Toshiba Corp ディスプレイの照明装置
WO2009069010A1 (fr) * 2007-11-28 2009-06-04 Koninklijke Philips Electronics N.V. Système d'éclairage, procédé et dispositif de projection pour commander une lumière émise pendant une période de temps de rayon
RU2463730C2 (ru) * 2007-11-28 2012-10-10 Конинклейке Филипс Электроникс Н.В. Осветительная система, способ и проекционное устройство для управления светом, испускаемым в течение спицевого периода времени
US8425052B2 (en) 2007-11-28 2013-04-23 Koninklijke Philips Electronics N.V. Illumination system, method and projection device for controlling light emitted during a spoke time period
JP2012203344A (ja) * 2011-03-28 2012-10-22 Casio Comput Co Ltd 光源ユニット及びプロジェクタ

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