WO2015136616A1 - Dispositif d'affichage d'image et procédé d'affichage d'image - Google Patents

Dispositif d'affichage d'image et procédé d'affichage d'image Download PDF

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Publication number
WO2015136616A1
WO2015136616A1 PCT/JP2014/056283 JP2014056283W WO2015136616A1 WO 2015136616 A1 WO2015136616 A1 WO 2015136616A1 JP 2014056283 W JP2014056283 W JP 2014056283W WO 2015136616 A1 WO2015136616 A1 WO 2015136616A1
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WO
WIPO (PCT)
Prior art keywords
light
white
color
video signal
component
Prior art date
Application number
PCT/JP2014/056283
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English (en)
Japanese (ja)
Inventor
幸則 潮屋
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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Application filed by Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2014/056283 priority Critical patent/WO2015136616A1/fr
Publication of WO2015136616A1 publication Critical patent/WO2015136616A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • G09G5/02—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed
    • G09G5/022—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators characterised by the way in which colour is displayed using memory planes
    • 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
    • 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
    • G03B33/00—Colour photography, other than mere exposure or projection of a colour film
    • G03B33/08—Sequential recording or projection
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • 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
    • 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
    • H04N9/3155—Modulator illumination systems for controlling the light source
    • 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]
    • H04N9/3179—Video signal processing therefor
    • H04N9/3182—Colour adjustment, e.g. white balance, shading or gamut
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0242—Compensation of deficiencies in the appearance of colours
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
    • G09G2330/02—Details of power systems and of start or stop of display operation
    • G09G2330/021—Power management, e.g. power saving
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
    • G09G3/346—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on modulation of the reflection angle, e.g. micromirrors

Definitions

  • the present invention relates to an image display apparatus and an image display method, for example, an image display apparatus and an image display method for displaying an image by irradiating light to a light modulation display element driven in accordance with a video signal.
  • an image display device including a light modulation display element such as a DMD (Digital Micromirror Device), a color wheel including red, green and blue color filters, and a light source is known.
  • a light modulation display element such as a DMD (Digital Micromirror Device)
  • a color wheel including red, green and blue color filters
  • a light source is known.
  • the color wheel includes red, green, and blue color filters, sequentially extracts red, green, and blue light from the light of the light source, and extracts the extracted red, green, and blue light,
  • the light modulation display element is sequentially irradiated.
  • the light modulation display element is based on a red component signal, a green component signal, and a blue component signal among the video signals while the red light, the green light, and the blue light are irradiated. And the red, green, and blue lights are respectively modulated to generate a red component image, a green component image, and a blue component image.
  • the light modulation display element displays an image corresponding to a video signal by displaying a red component image, a green component image, and a blue component image in a superimposed manner on a display area such as a screen.
  • Patent Document 1 describes an image display device having a color wheel provided with a white color filter in addition to red, green and blue color filters in order to increase the brightness of a display image.
  • the image display device described in Patent Document 1 includes red, green, and blue light from the light modulation display element in an area in which white is specified by a video signal (hereinafter referred to as “white display area”) in the display area.
  • white display area a video signal
  • white light from the light modulation display element is irradiated. For this reason, the amount of light applied to the white display area is increased, and the display image is brightened.
  • the image display device described in Patent Document 1 detects the ratio of the white component in the image indicated by the video signal, and emits white light when the ratio of the white component is low and the display image is dark. Control is performed to reduce the light amount of the light source during the period, and to increase the light amount of the light source during the period in which red, green, and blue light is irradiated. With this control, when the ratio of the white component is low, an area other than the white display area (hereinafter referred to as “non-white display area”) in the display area becomes bright, and the brightness of the entire image is improved.
  • FIG. 1 is a diagram showing the power ratio of the light source corresponding to the light of each color when the ratio of the white component is a predetermined value or more.
  • the power ratio is a ratio with respect to a predetermined reference power.
  • FIG. 2 is a diagram showing the power ratio of the light source corresponding to the light of each color when the ratio of the white component is less than a predetermined value.
  • the light source increases in light amount as the power increases, and that the light source is driven by one of the power ratios of the light source corresponding to the light of each color shown in FIG. 1 or FIG.
  • the light amount of the light source when the ratio of the white component is less than a predetermined value (FIG. 2) is equal to or greater than the predetermined value.
  • the amount of light is smaller than that of the light source.
  • the light amount of the light source when the ratio of the white component is less than a predetermined value (FIG. 2)
  • the light quantity of the light source of 1) is larger. This is because when the light amount of the light source is reduced during the period of white light irradiation, the brightness of the entire image is reduced. To compensate for this, the period of red, green, and blue light irradiation Then, the light quantity of the light source is increased.
  • An object of the present invention is to provide an image display device and an image display method capable of solving the above-described problems.
  • the image display device of the present invention is A light source that outputs light; Extraction means for sequentially extracting white light and light of a color different from white from the light output from the light source; Detecting means for detecting a ratio of a white component in an image represented by the input video signal based on the input video signal; In the situation where the extraction means extracts light of a color different from the white, the light quantity of the light source is not increased, and in the situation where the extraction means extracts the white light, the white component detected by the detection means Control means for controlling the light quantity of the light source according to the ratio; The light of each color sequentially extracted by the extracting means is modulated according to a signal of a component corresponding to the color of the light in the input video signal, and the modulated light of each color is superimposed on the display surface. Light modulation means for displaying an image corresponding to the input video signal.
  • the image display method of the present invention includes: An image display method performed by an image display device, From the light emitted from the light source, white light and light of a different color from white are sequentially extracted. Based on the input video signal, the ratio of the white component in the image represented by the input video signal is detected, In a situation where light of a color different from the white is extracted, the light quantity of the light source is not increased, and in a situation where the white light is extracted, the light quantity of the light source is controlled according to the ratio of the white component, The sequentially extracted light of each color is modulated according to a signal of a component corresponding to the color of the light in the input video signal, and the modulated light of each color is superimposed on a display surface to form the input video signal. The corresponding image is displayed.
  • FIG. 5 is a diagram illustrating an example of a ratio of white components detected by a color component extraction unit.
  • FIG. 5 is a diagram illustrating an example of a ratio of white components detected by a color component extraction unit.
  • FIG. 3 is a diagram showing a projector 100 according to an embodiment of the present invention.
  • the projector 100 is an example of an image display device.
  • the projector 100 includes a lamp 1, a color wheel 2, a projector control unit 3, a color component extraction unit 4, a control unit 5, a color wheel drive unit 6, a DMD drive unit 7, a DMD 8, and an optical system 9. And including.
  • the control unit 5 includes a lamp control unit 51 and a lamp driving unit 52.
  • the lamp 1 is an example of a light source.
  • the lamp 1 outputs light.
  • the lamp 1 has a characteristic that the amount of light increases as the supplied power increases.
  • the color wheel 2 is an example of extraction means.
  • the color wheel 2 includes white, red, green and blue color filters 2a to 2d.
  • the color wheel 2 sequentially extracts white light, red light, green light, and blue light from the light output from the lamp 1 by passing the light from the lamp 1 while rotating.
  • the projector control unit 3 controls the overall operation of the projector 100 and processes the input video signal (input video signal). In the present embodiment, the projector control unit 3 generates a white component video signal, a red component video signal, a green component video signal, and a blue component video signal from the video signal.
  • the projector control unit 3 sequentially outputs a white component video signal, a red component video signal, a green component video signal, and a blue component video signal, a color wheel driving unit 6, a lamp driving unit 52, Output to the DMD drive unit 7. Further, the projector control unit 3 outputs a white component video signal to the color component extraction unit 4.
  • the color component extraction unit 4 is an example of a detection unit.
  • the color component extraction unit 4 detects the ratio of the white component in the image represented by the video signal based on the video signal of the white component.
  • the control unit 5 is an example of a control means.
  • the control unit 5 controls the light amount of the lamp 1 in a situation where the color wheel 2 extracts white light according to the ratio of the white component detected by the color component extraction unit 4. Further, the control unit 5 maintains the light amount of the lamp 1 without increasing it in a situation where the color wheel 2 extracts red light, green light, and blue light, respectively.
  • the lamp control unit 51 calculates the power of the lamp 1 in a situation where the color wheel 2 extracts white light based on the ratio of the white component. In addition, the lamp controller 51 sets the light amount of the lamp 1 to a constant value when the color wheel 2 extracts red light, green light, and blue light, respectively, regardless of the ratio of the white component.
  • the lamp control unit 51 uses the power of the lamp 1 when the color wheel 2 extracts white light, and the white component ratio is larger than the threshold.
  • the power of the lamp 1 is set to be smaller than that in a situation where the color wheel 2 extracts white light.
  • the threshold value is registered in advance in the lamp control unit 51.
  • the lamp control unit 51 generates a light amount control signal indicating the power of the lamp 1 when the color wheel 2 extracts white, red, green, and blue light, and outputs the light amount control signal to the lamp driving unit 52. .
  • the lamp driving unit 52 follows the light amount control signal from the lamp control unit 51, the white component video signal, the red component video signal, the green component video signal, and the blue component video signal from the projector control unit 3, respectively.
  • the power supplied to the lamp 1, that is, the light quantity of the lamp 1 is controlled.
  • the color wheel drive unit 6 extracts the white light from the light of the lamp 1 while receiving the white component video signal, and the color wheel 2 is the lamp while receiving the red component video signal.
  • the red light is extracted from the light 1 and the color wheel 2 extracts the green light from the light of the lamp 1 while the green component video signal is received, and the color while the blue component video signal is received.
  • the rotation of the color wheel 2 is controlled so that the wheel 2 extracts blue light from the light from the lamp 1.
  • the DMD driving unit 7 drives the DMD 8 according to the white component video signal, and when receiving the red component video signal, the DMD driving unit 7 drives the DMD 8 according to the red component video signal to generate the green component video.
  • the DMD 8 is driven according to the green component video signal, and when the blue component video signal is received, the DMD 8 is driven according to the blue component video signal.
  • the DMD8 is an example of light modulation means.
  • the DMD 8 modulates the light of each color sequentially extracted by the color wheel 2 according to the signal of the component corresponding to the color of the light in the video signal, and the modulated light of each color via the optical system 9.
  • the image corresponding to the video signal is displayed by superimposing it on a display surface such as a screen.
  • the projector control unit 3 Upon receiving the video signal, the projector control unit 3 generates a white component video signal, a red component video signal, a green component video signal, and a blue component video signal from the video signal.
  • the projector control unit 3 outputs the white component video signal to the color component extraction unit 4, and the white component video signal, the red component video signal, the green component video signal, and the blue component video signal
  • the video signals are sequentially output to the color wheel driving unit 6, the lamp driving unit 52, and the DMD driving unit 7.
  • the color component extraction unit 4 detects the ratio of the white component in the image represented by the video signal based on the white component video signal.
  • the color component extraction unit 4 calculates the ratio of the number of white pixels in the image represented by the white component video signal to the total number of pixels of the image represented by the white component video signal. Is calculated as a ratio (video ratio).
  • 4 and 5 are diagrams showing examples of the ratio of the white component detected by the color component extraction unit 4.
  • FIG. 4 shows a case where the ratio of the white component is larger than the threshold value
  • FIG. 5 shows a case where the ratio of the white component is smaller than the threshold value.
  • the color component extraction unit 4 outputs the calculation result of the white component ratio to the lamp control unit 51.
  • the lamp control unit 51 compares the calculation result of the white component ratio with a threshold value.
  • the lamp control unit 51 sets the power ratio of the lamp 1 at the time of white light extraction to 128%, and other colors of light (red , Green and blue light), the power ratio of the lamp 1 during extraction is set to 85%.
  • the lamp control unit 51 generates a light amount control signal that sets the power ratio of the lamp 1 at the time of white light extraction to 128% and the power ratio of the lamp 1 at the time of light extraction of other colors to 85%, and the light amount thereof.
  • a control signal is output to the lamp driver 52.
  • the lamp driving unit 52 supplies power (lamp 1) to the lamp 1 according to the light amount control signal, the white component video signal, the red component video signal, the green component video signal, and the blue component video signal. The amount of light).
  • FIG. 6 shows the operation of the lamp 1 when a light amount control signal is received in which the power ratio of the lamp 1 at the time of white light extraction is 128% and the power ratio of the lamp 1 at the time of light extraction of other colors is 85%. It is a figure.
  • the power ratio of the lamp 1 when the color wheel 2 extracts white light is 128%, and the power ratio of the lamp 1 when the color wheel 2 extracts light of other colors is 85%. %.
  • the entire projected image can be brightened by increasing the power of the lamp 1 when the color wheel 2 is extracting white light.
  • the lamp control unit 51 sets the power ratio of the lamp 1 at the time of white light extraction to 85%, and lights of other colors. (Red, green, blue light) The power ratio of the lamp 1 at the time of extraction is set to 85%.
  • the lamp control unit 51 generates a light amount control signal that sets the power ratio of the lamp 1 during white light extraction to 85% and the power ratio of the lamp 1 during light extraction of other colors to 85%.
  • a control signal is output to the lamp driver 52.
  • the lamp driving unit 52 supplies power (lamp 1) to the lamp 1 according to the light amount control signal, the white component video signal, the red component video signal, the green component video signal, and the blue component video signal. The amount of light).
  • FIG. 7 shows the operation of the lamp 1 when a light amount control signal is received in which the power ratio of the lamp 1 when extracting white light is 85% and the power ratio of the lamp 1 when extracting light of other colors is 85%. It is a figure.
  • the power ratio of the lamp 1 when the color wheel 2 extracts white light is 85%, and the power ratio of the lamp 1 when the color wheel 2 extracts light of other colors is 85%. %.
  • the color wheel 2 when the white component is small, the color wheel 2 extracts white light without increasing the power of the lamp 1 when the color wheel 2 is extracting red, green, and blue light.
  • the power of the lamp 1 is lowered when the lamp is on, and the average power of the lamp 1 is lowered.
  • the lamp control unit 51 When the calculation result of the white component ratio is the same as the threshold value, the lamp control unit 51 operates in the same manner as when the calculation result of the white component ratio is larger than the threshold value. When the calculation result of the white component ratio is the same as the threshold value, the lamp control unit 51 does not operate as in the case where the calculation result of the white component ratio is larger than the threshold value, and calculates the white component ratio. The operation may be the same as when the result is smaller than the threshold value.
  • the color component extraction unit 4 detects the ratio of the white component in the image represented by the video signal based on the video signal.
  • the control unit 5 controls the light amount of the lamp 1 in accordance with the ratio of the white component detected by the color component extraction unit 4.
  • the DMD 8 modulates the light of each color sequentially extracted by the color wheel 2 according to the signal of the component corresponding to the color of the light in the video signal, and superimposes the modulated light of each color on the display surface. An image corresponding to the video signal is displayed.
  • the light intensity of the lamp 1 is reduced when the color wheel 2 extracts white light
  • the light intensity of the lamp 1 cannot be increased when the color wheel 2 extracts light of a color different from white. Therefore, the average power in the lamp 1 can be reduced, and the power consumption can be reduced.
  • an image display device including the lamp 1, the color wheel 2, the color component extraction unit 4, the control unit 5, and the DMD 8.
  • control unit 5 maintains the light amount of the lamp 1 at a constant value in a situation where the color wheel 2 extracts red, green, and blue light.
  • control unit 5 when the ratio of the white component becomes smaller than the threshold value, the control unit 5 reduces the amount of light from the lamp 1 when the color wheel 2 extracts white light.
  • the light quantity of the lamp 1 is controlled using one threshold value, but the control unit 5 is, for example, a data table showing a plurality of threshold values and the light quantity of the lamp 1 corresponding to each threshold value.
  • the control unit 5 is, for example, a data table showing a plurality of threshold values and the light quantity of the lamp 1 corresponding to each threshold value.
  • red, green, and blue are used as colors different from white.
  • colors different from white are not limited to red, green, and blue, and may be cyan, magenta, and yellow, for example.
  • the control unit 5 determines the amount of light from the lamp 1 when the color wheel 2 extracts white light, and the color wheel 2 is red, green, and blue.
  • the amount of light from the lamp 1 in the situation where the color wheel 2 extracts white light when the ratio of the white component is smaller than the threshold is white. It should be less than the amount of light from the lamp 1 when the color wheel 2 extracts white light when the ratio of the components is larger than the threshold.
  • control unit 5 uses the same amount of light from the lamp 1 when the color wheel 2 extracts red, green, and blue light, but the lamp when the color wheel 2 extracts red light.
  • the amount of light from 1, the amount of light from the lamp 1 when green light is extracted, and the amount of light from the lamp 1 when blue light is extracted may be set differently.
  • the DMD is used as an example of the light modulation means, but the light modulation means is not limited to the DMD and can be changed as appropriate.
  • a liquid crystal panel may be used.
  • the power of the lamp 1 corresponding to each color indicated in the light amount control signal is not limited to the above and can be changed as appropriate.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Hardware Design (AREA)
  • Theoretical Computer Science (AREA)
  • Projection Apparatus (AREA)

Abstract

Le but de la présente invention est de réduire la consommation d'énergie d'une source de lumière dans un dispositif d'affichage d'image pourvu d'un élément de modulation de lumière, d'une roue de couleurs et d'une source de lumière. Un dispositif d'affichage d'image (100) comporte : une source de lumière (1) pour émettre de la lumière; un moyen d'extraction (2) pour extraire séquentiellement de la lumière de couleur blanche et de la lumière de couleur non blanche de la lumière émise par la source de lumière (1); un moyen de détection (4) pour détecter la proportion d'une composante de couleur blanche dans une image représentée par un signal vidéo d'entrée sur la base du signal vidéo d'entrée; un moyen de commande (5) qui n'augmente pas la quantité de lumière de la source de lumière si le moyen d'extraction (2) extrait de la lumière de couleur non blanche, et commande la quantité de lumière de la source de lumière (1) en fonction de la proportion de composante de couleur blanche détectée par le moyen de détection (4) si le moyen d'extraction (2) extrait de la lumière de couleur blanche; et un moyen de modulation de lumière (8) qui module de la lumière de chaque couleur séquentiellement extraite par le moyen d'extraction (2) en fonction d'un signal correspondant à la composante de couleur de lumière dans le signal vidéo d'entrée, et affiche une image conformément au signal vidéo d'entrée par superposition de lumière modulée de chaque couleur sur une surface d'affichage.
PCT/JP2014/056283 2014-03-11 2014-03-11 Dispositif d'affichage d'image et procédé d'affichage d'image WO2015136616A1 (fr)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004301932A (ja) * 2003-03-28 2004-10-28 Matsushita Electric Ind Co Ltd 画像表示装置
WO2006027866A1 (fr) * 2004-09-03 2006-03-16 Sharp Kabushiki Kaisha Projecteur
JP2006317845A (ja) * 2005-05-16 2006-11-24 Nec Viewtechnology Ltd カラーリング切り替え機構を有する画像表示装置とカラーホイール制御方法
JP2007279366A (ja) * 2006-04-06 2007-10-25 Sharp Corp プロジェクタ
JP2010085726A (ja) * 2008-09-30 2010-04-15 Casio Computer Co Ltd 投影装置、投影方法及びプログラム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004301932A (ja) * 2003-03-28 2004-10-28 Matsushita Electric Ind Co Ltd 画像表示装置
WO2006027866A1 (fr) * 2004-09-03 2006-03-16 Sharp Kabushiki Kaisha Projecteur
JP2006317845A (ja) * 2005-05-16 2006-11-24 Nec Viewtechnology Ltd カラーリング切り替え機構を有する画像表示装置とカラーホイール制御方法
JP2007279366A (ja) * 2006-04-06 2007-10-25 Sharp Corp プロジェクタ
JP2010085726A (ja) * 2008-09-30 2010-04-15 Casio Computer Co Ltd 投影装置、投影方法及びプログラム

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