WO2014112032A1 - 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
WO2014112032A1
WO2014112032A1 PCT/JP2013/050517 JP2013050517W WO2014112032A1 WO 2014112032 A1 WO2014112032 A1 WO 2014112032A1 JP 2013050517 W JP2013050517 W JP 2013050517W WO 2014112032 A1 WO2014112032 A1 WO 2014112032A1
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WIPO (PCT)
Prior art keywords
light source
image
output
display device
light
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PCT/JP2013/050517
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English (en)
Japanese (ja)
Inventor
伸秀 藤岡
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Ｎｅｃディスプレイソリューションズ株式会社
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Priority to PCT/JP2013/050517 priority Critical patent/WO2014112032A1/fr
Publication of WO2014112032A1 publication Critical patent/WO2014112032A1/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
    • 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
    • G09G3/3406—Control of illumination source
    • 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
    • G09G2320/0633—Adjustment of display parameters for control of overall brightness by amplitude modulation of the brightness of the illumination source
    • 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
    • G09G2320/064—Adjustment of display parameters for control of overall brightness by time modulation of the brightness of the illumination source
    • 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
    • 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
    • G09G3/2007—Display of intermediate tones
    • G09G3/2018—Display of intermediate tones by time modulation using two or more time intervals
    • G09G3/2022—Display of intermediate tones by time modulation using two or more time intervals using sub-frames
    • 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
    • G09G3/3406—Control of illumination source
    • G09G3/3413—Details of control of colour illumination sources

Definitions

  • the present invention relates to an image display device and an image display method that improve contrast while reducing power consumption by controlling light sources according to images.
  • the luminance signal input to the display element such as a liquid crystal is increased in accordance with the decrease of the output of the light source.
  • the range of luminance that can be modulated is added to the range that is modulated by the luminance signal due to fluctuations in the light source output, and there is an advantage that the luminance range that can be modulated can be effectively increased. This is because a change in luminance due to a change in the output of the light source is superimposed on the luminance range indicated by the luminance signal.
  • Patent Document 1 Japanese Patent Laid-Open No. 2007-292823
  • Patent Document 2 Japanese Patent No. 46616955
  • Patent Document 1 discloses a projection apparatus that suppresses power consumption by selecting a gradation conversion mode according to the maximum luminance in the screen and reducing the light amount of the light source.
  • Patent Document 2 discloses an operation such as controlling the light amount of a light source by a histogram calculation of luminance for each line in a projection display device by line scanning using a galvano mirror. By this operation, in a dark area, the light becomes darker by lowering the light amount of the light source, so that the contrast can be improved.
  • JP 2007-292823 A Japanese Patent No. 4616955
  • the light amount adjustment operation disclosed in each of the above-mentioned documents is based on the premise that the light source output is not changed during one frame or sub-frame or during the scanning period for one scanning line. For this reason, the advantages of changing the light source output within one frame or subframe are not taken into consideration at all.
  • An object of the present invention is to display faithfully even an image having a finer luminance difference by appropriately changing the light source output even within one frame or sub-frame.
  • the image display device of the present invention includes a light source, A display element that forms projected image light by incident light from the light source; A controller that controls the light source and the display element according to an image signal, The controller is The output of the light source is changed within one frame which is a minimum display time for displaying one image indicated by the image signal.
  • the image display method of the present invention includes a light source, A display element that forms projected image light by incident light from the light source; An image display method performed by an image display device including the light source and a control unit that controls the display element according to an image signal, The control unit is The output of the light source is changed within one frame which is a minimum display time for displaying one image indicated by the image signal.
  • the bit depth can be effectively increased.
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain.
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain.
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain. It is a figure for demonstrating the output state of the light source in the 1st Embodiment of this invention, (a) is the display output with respect to the input value which shows the brightness
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain. It is a figure for demonstrating the output state of the light source in the 1st Embodiment of this invention, (a) is the display output with respect to the input value which shows the brightness
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain. It is a figure which shows the gradation reproducibility by this invention. It is a figure which shows the gradation reproducibility by this invention. It is a figure which shows the gradation reproducibility by this invention.
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain.
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain.
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain. It is a figure for demonstrating the output state of the light source in the 2nd Embodiment of this invention, (a) is the display output with respect to the input value which shows the brightness
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain. It is a figure for demonstrating the output state of the light source in the 2nd Embodiment of this invention, (a) is the display output with respect to the input value which shows the brightness
  • FIG. 5B is a graph in which the panel output is plotted linearly
  • FIG. 5B is a conceptual diagram showing the light source output in the time domain.
  • FIG. 1 is a block diagram showing a schematic configuration of an optical system of a first embodiment of an image display device according to the present invention.
  • the present embodiment includes light sources 101R, 101G, and 101B, a dichroic mirror 102, a control unit 103, a reflecting mirror 105, a prism 106, a DLP (Digital Light Processing: registered trademark) element 107, and a projection lens 108.
  • the light sources 101R, 101G, and 101B are LEDs (Light Emitting Diodes) that generate red, green, and blue light, respectively.
  • the light emitted from each light source enters the dichroic mirror 102, is emitted in the same direction, is folded by the reflection mirror 105, and enters the prism 106.
  • the incident light to the prism 106 is reflected by the DLP element 107, modulated, and then emitted as projection image light through the projection lens 108.
  • the control unit 103 receives the image signal 104, and controls the light emission states of the light sources 101R, 101G, and 101B and the display state of the DLP element 107 according to the contents.
  • the light sources 101R, 101G, and 101B emit light in order, light of different colors is sequentially incident on the DLP element 107, and projection image light of each color is emitted in a time division manner.
  • FIG. 2 schematically shows time-series operations of the light sources 101R, 101G, and 101B and the DLP element 107 when different colors of light are sequentially incident on the DLP element 107.
  • FIG. 2 shows a case where 8 bits are allocated to the subframe 47 for turning on the green light source while sequentially turning on the red (RED), green (GREEN), and blue (BLUE) light sources in one frame 43. Show.
  • Figure 2 shows a simple binary bit sequence for 8-bit color, assigning different time widths up to bit 7, such that bit 0 is twice bit 1 and bit 1 is twice bit 2. ing. Since 8 bits are assigned by turning on / off these bits, a panel output corresponding to a natural number from 0 to 255 in decimal number can be displayed.
  • the order may be changed or a specific bit may be further divided. Further, it may be considered that other colors are added as sub-frames for each color.
  • the images of the respective colors are displayed in a time-sharing manner.
  • the image recognized by human beings is an image obtained by integrating the light amounts of the respective colors for a time of about one frame.
  • the present invention can be applied to a color image using sub-frames of each color or an image display device that displays a single-color image without using a sub-frame. In the following description, a frame and a sub-frame are equivalently described. Handle and explain.
  • control unit 103 The control of the output state of the light source by the control unit 103 will be described with reference to FIGS.
  • (a) is a graph in which the display output with respect to the input value indicating the luminance of the image signal during one frame or subframe period and the panel output are linearly plotted, and (b) is the graph.
  • the conceptual diagram which represented the light source output in the time domain is shown.
  • the display output represents the brightness of the corresponding pixel projected based on the input value.
  • the display output is a value that depends on both the light source output based on the input value and the panel output.
  • the input value and the display output are analog values from 0 to 1, respectively, and indicate relative values with the maximum value being 1.
  • the conceptual diagram of the light source output in (b) shows the optical waveform in one frame or subframe in correspondence with the simplified bit sequence of the DLP chip and the time axis. Moreover, (a) considers the case where all display the image whose input value is the range of 0 to 0.5.
  • the input value is 0 to 0.5
  • the panel output for obtaining the corresponding display output 0 to 0.5 is 0 to 127 by 7 bits from bit 0 to bit 6, 128 tones will be used.
  • FIG. 3B shows an example in which a double gain is applied electrically to the panel output.
  • the panel output in this case is 0 to 255 by 8 bits from bit 0 to bit 7, and 256 gradations are used.
  • a correct display output cannot be obtained simply by electrically amplifying the panel output. That is, in this case, the display output is 0 to 1 as shown in FIG. 3B.
  • FIG. 3C shows a case where a double gain is applied electrically to the panel output as in FIG. 3B, and the output of the light source is halved.
  • the panel output is 0 to 255, and the display output can be correctly displayed as 0 to 0.5 while using 256 gradations.
  • the number of gradations used in FIG. 3A is 128, while the number of gradations used in FIG. 3C is 256. It has doubled. In other words, compared to FIG. 3A, the gradation reproducibility is doubled in FIG. 3C.
  • FIG. 4 considers a case where an image having an input value in the range of 0.375 to 0.5 is displayed.
  • 4A and 4B are graphs in which the display output and the panel output with respect to the input of the image signal are linearly plotted, and
  • FIG. 4B is a conceptual diagram showing the light source output in the time domain. Show.
  • FIG. 4A shows the case of the reference operation in which the output of the light source is maximum and constant in one frame or subframe.
  • the panel output is 96 to 127 in order to obtain the corresponding display output 0.375 to 0.5, and 32 gradations are used. Become.
  • FIG. 4B shows a case where a double gain is applied electrically to the panel output and the output of the light source is halved, as in FIG. 3C.
  • the panel output is 192 to 255, and the display output can be displayed at 0.375 to 0.5 while using 64 gradations.
  • the number of gradations used in FIG. 4A is 32 while the number of gradations used in FIG. 4B is 64. It has doubled. In other words, compared to FIG. 4A, the gradation reproducibility is doubled in FIG. 4B.
  • FIG. 5 shows a diagram similar to FIG. 4 when displaying an image with an input value in the range of 0.375 to 0.5.
  • FIG. 5 is a graph obtained by linearly plotting the display output and the panel output with respect to the input of the image signal, and (b) is a graph showing the light source output in the time domain. A conceptual diagram is shown.
  • the period from bit 0 to bit 6 is different from the period of bit 7.
  • the light source output is set so that the amount of light corresponding to the minimum display output can be obtained.
  • an appropriate light source output is set for this period so that the remaining bits 0 to 6 can be used for gradation expression.
  • the panel output is 128 to 255, and 128 gradations are used.
  • electrical processing is performed on the panel output so that the panel output corresponding to the input value of 0.375 to 0.5 is 128 to 255.
  • FIG. 4A and FIG. 5 are compared by paying attention to the number of gradations used, the number of gradations used in FIG. 4A as a reference is 32, whereas the number of gradations used in FIG. 5 is 128. It has quadrupled. That is, compared with FIG. 4A, the gradation reproducibility is increased four times in FIG.
  • the effective bit depth can be obtained. May increase.
  • the operation corresponding to FIG. 5 is hereinafter referred to as “dimming 2”.
  • dimming 1 and dimming 2 can be applied to any combination of maximum and minimum input values. Therefore, next, gradation reproducibility obtained by dimming 1 and dimming 2 with respect to the combination of maximum and minimum input values is shown in FIGS. 6A to 6F.
  • 6A to 6F show the calculation results that are valid only for half of the graph because of the relationship between the maximum and minimum values.
  • FIG. 6A shows a ratio between the number of gradations used in the light control 1 and the number of gradations used in the reference operation. This ratio is referred to as a gradation reproducibility improvement ratio for convenience.
  • the gradation reproducibility improvement ratio by the light control 1 depends only on the maximum value of the input value. That is, as the maximum input value decreases, the gradation reproducibility improvement ratio increases inversely proportionally.
  • FIG. 6B shows the gradation reproducibility improvement ratio in the light control 2.
  • the gradation reproducibility improvement ratio by dimming 2 depends on the difference between the maximum and minimum input values. That is, as the difference between the maximum and minimum input values decreases, the gradation reproducibility improvement ratio increases inversely proportionally.
  • FIG. 6C shows a graph in which a large value is plotted among the gradation reproducibility improvement ratios shown in FIGS. 6A and 6B. As described above, the operation as shown in FIG. 6C can be obtained by properly using the light control 1 and the light control 2 according to the combination of the maximum and minimum input values.
  • 6D, 6E, and 6F show the number of bits that can be effectively increased by dimming 1 and dimming 2 with respect to the actual number of bits used in the reference operation. This corresponds to the gradation reproducibility improvement ratio shown in FIGS. 6A, 6B, and 6C expressed in logarithm with a base of 2.
  • dimming 1 and dimming 2 improve the gradation reproducibility with respect to the reference operation.
  • Solid light sources such as LEDs and lasers often have a higher peak output during pulse lighting than during continuous lighting. If this property is used, the bit depth may be increased while the time of one frame or subframe is kept constant.
  • FIG. 7A and 7B are graphs in which the display output and the panel output with respect to the input of the image signal are linearly plotted, and FIG. 7B shows the light source output in the time domain. A conceptual diagram is shown.
  • FIG. 7A is the same as FIG. 3A and FIG. 4A.
  • FIG. 7A shows a reference operation in which the light source output is constant at 1.
  • FIG. 7B the light source output is changed in the first half and the second half by dividing the bit 7 in FIG.
  • bit 8 is assigned to the latter half of the driving of the DLP element in one frame.
  • the light source output is changed by a factor of two in order to correctly represent the gradation. That is, as shown in FIG. 7B, the light source outputs during the period of bit 6, bit 7, and bit 8 are 0.5, 1, and 2, respectively. With this output value, the total light amount of the light source in one frame (or sub-frame) in FIGS. 7A and 7B becomes equal. For the latter, by adding bit 8, the bit depth can be increased by 1 bit.
  • FIG. 7C shows a case where the period of bit 7 and bit 8 in FIG. 7B is changed to be 1: 2.
  • the light source output in the period of bit 7 and bit 8 is 1.5, which can be lower than the above output.
  • the bit period can be selected according to the performance and characteristics of the light source.
  • the maximum display luminance is the same and the power consumption of the light source does not change.
  • bit period can be made variable according to the luminance range of the input image, the degree of freedom of operation can be increased, such as further increasing the bit depth.
  • FIG. 8A and 8B are graphs in which the display output and the panel output with respect to the input of the image signal are linearly plotted, and FIG. 8B is the light source output. Is a conceptual diagram representing this in the time domain.
  • FIG. 8A corresponds to FIG. 7C and shows an operation under a reference condition in which both the electrical gain with respect to the panel output and the light source output of each bit in the frame are not changed according to the image. It can be seen from the graph of FIG. 8A that the panel output is 192 to 255 (64 gradations).
  • bit 8 is turned off for all pixels, but bit 7 and bit 6 are turned on for all pixels.
  • the remaining bits 0 to 5 represent the gradation of the image.
  • FIG. 8B shows a case where a double gain is applied electrically and the light source output at each bit in the frame is halved. At this time, it can be seen from the graph that the panel output is 384 to 511 (128 gradations). When this corresponds to the bit sequence, all the pixels are turned on for bit 8 and bit 7, and the gradation of the image is expressed by the remaining bits 0 to 6.
  • FIG. 8C shows a case where the light source output is set so that the light amount corresponding to the minimum display output can be obtained in the period of bit 8 in order to further increase the bit depth as in FIG.
  • the panel output is 256 to 511 (256 gradations), and it can be seen that the bit depth can be further increased by 1 bit.
  • 8B and 8C correspond to the operations of “light control 1” and “light control 2” described in the first embodiment. Therefore, any of these can be applied to any combination of maximum and minimum input values. In addition, as in FIG. 6C, these operations may be properly used according to the combination of the maximum and minimum input values.
  • the light source output is set so that the minimum display value can be obtained in bit 8, but this is not limited to bit 8.
  • bit 8 and bit 7 can be used together, or only bit 7 may be used.
  • the light source and the DLP element are operated as shown in FIGS. 5 and 8C.
  • all the pixels are turned on for the specific bit, and the light amount assigned to the specific bit is the light amount corresponding to the minimum display output.
  • the light amount allocated to the specific bit is different from the light amount corresponding to the minimum display output. A case where the amount of light is used will be described.
  • FIG. 9 corresponding to FIG. 8C is shown.
  • 9A and 9B are graphs in which the display output and the panel output with respect to the input of the image signal are linearly plotted, as in FIGS. 3 to 5, FIG. 7, and FIG. Shows a conceptual diagram showing the light source output in the time domain.
  • the panel output value is shown in a graph including the case where bit 8 is turned off. As can be seen from this graph, the display output is switched from 0.125 to 0.375 at the panel outputs 255 and 256 which are the boundaries for turning bit 8 on or off. On the other hand, under these operating conditions, the panel outputs 0 to 255 correspond to the display outputs 0 to 0.125, and these display output ranges can also be displayed.
  • the driving conditions of the light source and the DLP element according to the present invention may be applicable depending on the luminance histogram of the display image.
  • it can be determined whether the driving condition is applicable according to the luminance histogram of the display image, and the driving condition can be changed based on the result. That is, according to the luminance histogram of the display image, the amount of light allocated to a specific bit is not necessarily the amount of light corresponding to the minimum display output, but can be different from the amount of light corresponding to the minimum display output.
  • the gradation reproducibility can be improved.
  • the gradation reproducibility is improved by setting the light amount allocated to a specific bit in driving the DLP element to a light amount different from the light amount corresponding to the minimum display output according to the luminance histogram of the display image. Can do.
  • an LED is used as a light source
  • a laser may be used, or a combination of an LED, a laser, and a phosphor may be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

La présente invention affiche fidèlement même des images ayant des différences de brillance plus fines par variation de manière appropriée d'une sortie de source lumineuse même dans une trame ou sous-trame unique. Un dispositif d'affichage d'image est pourvu de : une source lumineuse ; des éléments d'affichage qui forment une lumière d'image projetée au moyen d'une lumière incidente provenant de la source lumineuse ; et une unité de commande qui commande la source lumineuse et les éléments d'affichage selon un signal d'image. L'unité de commande fait varier la sortie de la source lumineuse dans une trame unique, qui est le temps d'affichage minimal affichant une image unique représentée dans le signal d'image.
PCT/JP2013/050517 2013-01-15 2013-01-15 Dispositif d'affichage d'image et procédé d'affichage d'image WO2014112032A1 (fr)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020039954A1 (fr) * 2018-08-20 2020-02-27 ソニー株式会社 Dispositif d'affichage

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Publication number Priority date Publication date Assignee Title
JPH07212686A (ja) * 1993-12-24 1995-08-11 Texas Instr Inc <Ti> 階調表現方法
JP2002278516A (ja) * 2001-03-16 2002-09-27 Ricoh Co Ltd 空間光変調装置及び空間光変調方法
JP2004226862A (ja) * 2003-01-27 2004-08-12 Mitsubishi Electric Corp 映像表示装置及び映像表示方法
JP2007078866A (ja) * 2005-09-12 2007-03-29 Sharp Corp 空間光変調システム、その駆動方法及びプロジェクタ
JP2008102442A (ja) * 2006-10-20 2008-05-01 Olympus Corp 画像投影装置
JP2010181695A (ja) * 2009-02-06 2010-08-19 Ntt Docomo Inc 画像表示制御装置、及び、画像表示制御方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07212686A (ja) * 1993-12-24 1995-08-11 Texas Instr Inc <Ti> 階調表現方法
JP2002278516A (ja) * 2001-03-16 2002-09-27 Ricoh Co Ltd 空間光変調装置及び空間光変調方法
JP2004226862A (ja) * 2003-01-27 2004-08-12 Mitsubishi Electric Corp 映像表示装置及び映像表示方法
JP2007078866A (ja) * 2005-09-12 2007-03-29 Sharp Corp 空間光変調システム、その駆動方法及びプロジェクタ
JP2008102442A (ja) * 2006-10-20 2008-05-01 Olympus Corp 画像投影装置
JP2010181695A (ja) * 2009-02-06 2010-08-19 Ntt Docomo Inc 画像表示制御装置、及び、画像表示制御方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020039954A1 (fr) * 2018-08-20 2020-02-27 ソニー株式会社 Dispositif d'affichage

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