WO2018168781A1 - Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif de visiocasque - Google Patents

Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif de visiocasque Download PDF

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Publication number
WO2018168781A1
WO2018168781A1 PCT/JP2018/009531 JP2018009531W WO2018168781A1 WO 2018168781 A1 WO2018168781 A1 WO 2018168781A1 JP 2018009531 W JP2018009531 W JP 2018009531W WO 2018168781 A1 WO2018168781 A1 WO 2018168781A1
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Prior art keywords
display device
screen
display
maximum luminance
gazing point
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PCT/JP2018/009531
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English (en)
Japanese (ja)
Inventor
奈留 臼倉
裕一 神林
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シャープ株式会社
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Publication of WO2018168781A1 publication Critical patent/WO2018168781A1/fr

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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • 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
    • 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
    • G09G3/22—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 using controlled light sources
    • G09G3/30—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 using controlled light sources using electroluminescent panels
    • 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
    • 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
    • G09G3/36—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 liquid crystals
    • 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
    • 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
    • G09G5/10—Intensity circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/64—Constructional details of receivers, e.g. cabinets or dust covers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light

Definitions

  • the present invention relates to a display method for a display device, a display device, and a head-mounted display device.
  • Patent Document 1 while maintaining the brightness of the center of the screen, the brightness of the periphery of the screen that the user does not relatively watch is reduced to reduce the power consumption while maintaining the brightness of the display screen.
  • Techniques for reducing are disclosed.
  • Japanese Patent Publication Japanese Patent Laid-Open No. 2007-104377 (published on April 19, 2007)
  • the inventor can make the user more comfortable than simply reducing the light amount of the display device toward the periphery as in the technique described in Patent Document 1.
  • a display method of a display device is a display method of a display device that is worn by a user and displays a screen in the entire field of view of the user.
  • the maximum luminance of the screen is monotonously decreased, and the position where the maximum luminance of the screen is decreased is dynamically changed according to the movement of the gazing point.
  • a display device is a display device that is worn by a user and displays a screen in the entire field of view of the user.
  • the maximum brightness of the screen decreases monotonously in the direction from the gazing point at which the camera gazes to the surroundings, and the position where the maximum luminance of the screen decreases dynamically changes according to the movement of the gazing point.
  • the present invention it is possible to provide a display method for a display device in which even if the display luminance is reduced, it is difficult for the user to recognize the decrease in display luminance.
  • the display surface side of the display device is shown as an upper surface
  • the backlight source side is shown as a lower surface.
  • members having the same functions as those described in the respective embodiments will be denoted by the same reference numerals in different embodiments, and description thereof will be omitted.
  • the display device is a display device that is worn by a user and displays a screen on the entire field of view of the user.
  • the display device may display the screen to the user by fixing the display device to the user's head, enlarging the screen with a lens, and displaying the enlarged screen to the user.
  • FIG. 2 is a diagram showing the display device 1 according to the first embodiment of the present invention.
  • 2A is a top view of the display device 1
  • FIG. 2B is a cross-sectional view taken along the line C1C2 of the display device 1 in FIG.
  • illustration of the polarizing plate 13 on the upper surface of the display panel 10 is omitted.
  • the display device 1 includes a display panel 10, a backlight light source 20 disposed on the lower surface of the display panel 10, and a line-of-sight tracking device 30.
  • the display panel is a liquid crystal panel
  • the present invention is not limited to this, and for example, a display panel using MEMS may be used.
  • the display panel 10 is configured such that a control substrate 11 (TFT substrate) and a color filter substrate 12 are attached to face each other with the color filter substrate 12 as a display surface side.
  • Polarizing plates 13 are attached to the backlight incident side of the control substrate 11 and the display surface side of the color filter substrate 12, respectively.
  • the backlight light source 20 includes a light emitting element 21 (LED element), a diffusion plate 22, and a reflection plate 23.
  • the light emitting element 21 is two-dimensionally arranged on the reflection plate 23 and emits light from below the diffusion plate 22 toward the display panel 10.
  • the intensity of light emitted from the light emitting element 21 can be controlled by the current flowing through the light emitting element 21.
  • the diffusion plate 22 diffuses the light from the light emitting element 21 to the display surface of the display panel 10.
  • the reflection plate 23 reflects light emitted from the light emitting element 21 to the side opposite to the display panel 10 side, and improves the display efficiency of the display device 1.
  • a total of 16 light emitting elements 21 are formed, but the number of light emitting elements 21 is not limited to this.
  • FIG. 2 shows a structure in which four light emitting elements 21 from 21a to 21d are formed at the end of the light guide plate 22.
  • the number of the light emitting elements 21 is not limited to this.
  • the dimensions and shapes of the display panel 10 and the backlight light source 20 are not limited to those described in FIG. 2, and may be a deformed display such as a circle.
  • the line-of-sight tracking device 30 is a device that identifies which position on the screen of the display device 1 the user of the display device 1 is gazing at.
  • the line-of-sight tracking device 30 includes, for example, an infrared light emitting element 31 and an infrared camera 32.
  • the line-of-sight tracking device 30 may irradiate the user's eyeball with infrared light by the infrared light emitting element 31 and photograph the infrared light reflected on the cornea and the user's pupil with the infrared camera 32. Thereby, the line-of-sight tracking device 30 may specify the point on which the user is gazing on the screen of the display device 1 from the relative position between the infrared light reflected on the cornea and the pupil of the user. .
  • gazing point the point on which the user is gazing on the screen of the display device 1 is referred to as a gazing point.
  • FIG. 4 is a diagram for explaining a comparative display device and a display method of the comparative display device.
  • FIG. 4 shows a case where the display device always displays a white screen. That is, it is assumed that the display device of FIG. 4 displays the maximum luminance at any position on the screen.
  • the graph shown on the comparative display device shows the relationship between the horizontal position of the comparative display device and the display brightness at that position.
  • the graph shown on the right side of the comparative display device shows the relationship between the vertical position of the comparative display device and the display brightness at that position.
  • A1, A2, B1, and B2 shown in these graphs and the display device 1 correspond to each other. That is, the graph shown on the display device of the comparative form shows the position dependency of the luminance on the line connecting A1 to A2 passing through the center of the display device of the comparative form.
  • the graph shown on the right of the display device of the comparative form shows the position dependency of the luminance on the line connecting B1 to B2 passing through the center of the display device of the comparative form.
  • the display device of the comparative form includes a display panel and a backlight light source, similar to the display device 1 of the present embodiment.
  • a backlight light source of a conventional display device is used in which the luminance of the entire screen is kept substantially uniform. For example, the difference between the minimum luminance and the maximum luminance is suppressed to within 20% of the in-plane luminance excluding the outermost peripheral 5 to 10 mm of the screen of the display device.
  • the display device of the comparative form includes a liquid crystal panel
  • the display device of the comparative form may include an OLED panel instead of the liquid crystal panel.
  • the display device of the comparative form includes an OLED panel, in general, a display device in which the luminance is maintained substantially uniform over the entire screen is used.
  • FIG. 1 is a diagram for explaining a display method of the display device 1 according to the present embodiment.
  • FIG. 1 shows a case where the display device 1 always displays a white screen. That is, it is assumed that the display device 1 in FIG. 1 displays the maximum luminance at any position on the screen.
  • the point O indicates a gazing point.
  • the graphs shown on the upper and right sides of the display device 1 show the position dependency of the luminance on the lines connecting A1 to A2 and B1 to B2 passing through the gazing point.
  • the distance between the display device 1 and the user's eyes is limited. Further, the user looks over the screen of the display device 1 mainly by the user's eye movement. For this reason, the range of the screen of the display device 1 that can be recognized by the user depends on the movement of the eyeball of the user. Further, when the user gazes at a certain point on the screen, the range of the screen of the display device 1 that can be recognized by the user is limited to around the point that the user gazes at. Therefore, it is not necessary to keep the luminance constant over the entire screen of the display device 1. For example, in a surrounding away from the point of interest that is difficult for the user to perceive, even if the luminance is reduced to some extent, the reduction in luminance is hardly recognized.
  • the display device 1 of the present embodiment is designed so that the maximum luminance is lower around the gazing point than near the gazing point on the screen of the display device 1.
  • a configuration is realized in which the power consumption of the display device 1 is suppressed and the user is less likely to be aware of the decrease in luminance.
  • FIG. 1 a specific display method of the display device 1 in which the maximum luminance decreases toward the periphery of the gazing point will be described.
  • the maximum luminance of the display device 1 is the surrounding direction, that is, the direction of A 1 from a position L that is dL away from the point of sight toward the screen of the display device 1. It has begun to decline monotonously. Similarly, the maximum luminance of the display device 1 starts to decrease monotonously from the position R that is dR away from the gazing point toward the screen of the display device 1 toward the surrounding direction, that is, the direction of A2. Yes.
  • the maximum luminance of the display device 1 is from the position U away from the gazing point toward the screen of the display device 1 by dU, in the surrounding direction, that is, in B1. It starts to decline monotonously in the direction. Similarly, the maximum luminance of the display device 1 starts to monotonously decrease from a position D separated by dD downward from the gazing point toward the screen of the display device 1 toward the surrounding direction, that is, the direction of B2. .
  • the maximum luminance of the display device 1 starts to decrease from a certain position on the screen of the display device 1 to the periphery.
  • maximum luminances corresponding to horizontal and vertical positions between A1 and A2 and between B1 and B2, that is, passing through the gazing point on the screen of the display device 1 are shown.
  • the maximum luminance decreases from the position E of the substantially ellipse connecting L, U, R, and D to the periphery.
  • the position where the maximum luminance starts to decrease may move in parallel with the movement of the gazing point. Therefore, the display device 1 can always perform display with the maximum luminance reduced around the gazing point.
  • the movable range of a person's pupil is about 30 degrees up, down, left, and right from the center of the pupil, although there are individual differences. For this reason, human vision has a characteristic that it is excellent in recognition within a viewing angle of about 30 degrees in the vertical and horizontal directions from the center of the visual field. In accordance with this characteristic, by reducing the maximum luminance of the display device 1 from the position of the screen exceeding the viewing angle of about 30 degrees in the vertical and horizontal directions from the user's point of sight, the display device 1 in which the luminance reduction is not easily recognized can be realized. .
  • the gazing point moves from the center to the end of the screen or from the end to the center, even if the maximum luminance change cannot sufficiently follow the movement of the gazing point, Because the luminance does not change, it is difficult for the user to recognize the decrease in luminance.
  • dL and dR are both longer than both dU and dD.
  • the maximum luminance of the display device 1 is closer to the point of interest at the start point of the decrease in the vertical direction than in the horizontal direction toward the screen of the display device 1.
  • ⁇ Human vision has a characteristic that it is more perceptible in the horizontal direction than in the vertical direction. Therefore, according to this characteristic, the display device 1 in which the decrease in luminance is less likely to be recognized can be realized by making the start position of the decrease in maximum luminance closer to the point of interest in the vertical direction than in the horizontal direction. Similarly, by increasing the rate of decrease in maximum luminance in the vertical direction rather than in the horizontal direction, it is possible to realize the display device 1 in which the reduction in luminance is less likely to be recognized.
  • the maximum luminance of the display device 1 may be gradually lowered at a screen position with a viewing angle of 40 degrees to 50 degrees from the gazing point. Further, the maximum luminance of the display device 1 may be set to 60% of the maximum luminance of the gazing point at a position of the outermost periphery (for example, a viewing angle of 50 degrees from the gazing point) in the horizontal direction of the screen of the display device 1. Further, in the vertical direction of the screen of the display device 1, the maximum luminance of the display device 1 may start to be gradually lowered at a screen position with a viewing angle of 30 degrees or more and 50 degrees or less from the gazing point.
  • the maximum luminance of the display device 1 may be set to 50% of the maximum luminance of the gazing point at a position of the outermost periphery (for example, a viewing angle of 50 degrees from the gazing point) in the vertical direction of the screen of the display device 1.
  • the light emission intensity of the backlight light source 20 is dynamically changed.
  • the light emission intensity of each light emitting element 21 is changed by dynamically controlling the current flowing through each light emitting element 21. For example, the maximum luminance around the gazing point of the display device 1 is reduced by setting the current value flowing through the light emitting element 21a around the gazing point to 60% of the current value flowing through the light emitting element 21b near the gazing point. Also good. Further, the current flowing through each light emitting element 21 may be dynamically changed according to the movement of the gazing point.
  • the light emission time of each light emitting element 21 may be changed by dynamically controlling the pulse width of the current flowing through each light emitting element 21.
  • the pulse width of the current flowing through the light emitting element 21a around the gazing point is set to 60% of the pulse width of the current flowing through the light emitting element 21b issued at the maximum luminance near the gazing point. The maximum brightness around the viewpoint may be reduced.
  • the pulse width may be dynamically changed according to the movement of the gazing point.
  • the lengths of dL and dR and the lengths of dU and dD may be different.
  • a configuration in which the lengths of dL and dR and the lengths of dU and dD are equal is given as an example.
  • the reduction in the maximum luminance of the display device 1 occurs in an axial symmetry with respect to the A1A2 line and the B1B2 line. If it is the said structure, since a brightness
  • the display device 1 reduces the display luminance to the maximum luminance when an image signal that requires display of luminance exceeding the maximum luminance is input at the position where the maximum luminance on the screen is reduced. Display. That is, when an image signal that requires display of brightness that does not exceed the maximum brightness is input, the display device 1 may perform display without reducing the brightness.
  • the display device 1 according to the present embodiment is not limited to the above-described configuration, and the display device 1 according to the present embodiment reduces the brightness of all the displays at the position where the maximum brightness is reduced according to the ratio of the reduction of the maximum brightness at the position. You may reduce in the same rate as the rate of reduction. This provides a display method that further reduces power consumption while the user is relatively less likely to notice a decrease in display brightness.
  • the light emission intensity of the light emitting element 21 is individually changed to reduce the light transmittance of the display panel 10 in any region of the screen of the display device 2 without reducing the light transmittance of the display panel 10. It is possible to reduce the display brightness of the screen. For this reason, the display device 2 can perform low-luminance display by reducing the light emission intensity of the backlight light source 20 without reducing the light transmittance of the display panel 10 as much as possible. Therefore, the display device 1 according to the present embodiment can perform display using so-called area active drive that controls display luminance by controlling the light emission intensity of the backlight light source 20.
  • the display brightness shown in the circle of FIG. 5 is 50% of the maximum display brightness of the display device 2.
  • the difference between the display device of the comparative example that does not use area active drive and the display device 1 that uses area active drive in the display of the positions shown in the circles of FIG. 5 will be described with reference to Table 1 below.
  • the column of “Panel transmissivity” in Table 1 shows the transmissivity of the backlight light in the display panel of each display device at the position shown in the circle of FIG.
  • the column of “backlight intensity” in Table 1 indicates the intensity of the backlight light of each display device at the position indicated by the circle in FIG.
  • the column “Display luminance” in Table 1 shows the actual display luminance of each display device at the position indicated by the circle in FIG.
  • the light transmittance of the display panel 10 is set to the maximum 50% without reducing the backlight intensity from the maximum. That is, the display device of the comparative example controls the liquid crystal through the control of the control board 11 so that the ratio of the light from the backlight light source transmitted through the display panel is 50%.
  • the backlight intensity is set to the maximum 50% while maintaining the light transmittance of the display panel 10 at the maximum.
  • the display device 1 can further reduce the intensity of the backlight light while maintaining the display gradation of the display panel even when the display device has a particularly low luminance, as compared with the display device of the comparative example. Is possible. Therefore, the display device 1 of the present embodiment can perform display with lower power consumption by performing display using area active drive.
  • FIG. 6 is a diagram illustrating the display device 2 according to the second embodiment.
  • 6A is a top view of the display device 2
  • FIG. 6B is a cross-sectional view taken along the line C1C2 of the display device 2 in FIG.
  • the display device 2 of this embodiment includes a display panel 40 instead of the display panel 10 and the backlight light source 20 as compared with the display devices 1 and 2.
  • the display panel 40 includes a control board 41 and a plurality of light emitting elements 42.
  • the control substrate 41 includes a TFT substrate, for example, and controls the light emission of each light emitting element 42 by controlling the current flowing through each light emitting element 42.
  • the light emitting element 42 is two-dimensionally arranged on the upper surface side of the control board 41.
  • the arrangement method of the light emitting elements 42 is not particularly limited.
  • the light emitting elements 42 may be arranged in a matrix on the control substrate 41. In FIG. 6, the light emitting elements 42 are illustrated at the four corners and the center of the display panel 40, but the light emitting elements 42 may be arranged in addition to these.
  • the light emitting elements 42 emit light independently under the control of the control board 41 and function as pixels of the display panel 40.
  • the light emitting element 42 changes its emission intensity depending on the intensity of the flowing current.
  • the light emitting element 42 is not particularly limited, and may include, for example, an organic EL element.
  • the control board 41 of the display device 2 can independently control the current flowing through each of the light emitting elements 42. For this reason, it is possible to set the maximum display luminance of the display device 2 for each pixel by limiting the upper limit of the current flowing through the light emitting element 42.
  • FIG. 7 is a diagram for explaining a display method of the display device 2 according to the present embodiment.
  • FIG. 7 shows a case where the display device 2 always displays a white screen.
  • the graph shown on the upper and right sides of the display device 2 is the same as the graph shown on the upper and right sides of the display device 1 in FIG. 1, and the maximum luminance on the line connecting A1 to A2 and B1 to B2 passing through the gazing point of the display device 2.
  • the position dependence of is shown.
  • the maximum luminance of the display device 2 starts to decrease from a certain position of the screen of the display device 2 to the periphery in a direction from the gazing point of the display device 2 toward the peripheral direction. Also in the present embodiment, the maximum luminance decreases from the position E of a substantially ellipse connecting L, U, R, and D to the periphery.
  • dL and dR are both longer than both dU and dD.
  • the maximum luminance of the display device 2 is closer to the point of interest at the start position of the decrease in the vertical direction than in the horizontal direction toward the screen of the display device 2.
  • a specific configuration for realizing the above includes a configuration in which the light emission intensity of the light emitting element 42 is dynamically changed.
  • a method for changing the light emission intensity of the light emitting element 42 there is a configuration in which the light emission intensity of each light emitting element 42 is changed by controlling the current flowing through each light emitting element 42. For example, even if the maximum luminance around the gazing point of the display device 1 is reduced by making the value of the current flowing through the light emitting element 42a around the gazing point lower than the value of the current flowing through the light emitting element 42b near the gazing point. Good. The current value may change dynamically according to the movement of the gazing point. With the above configuration, a backlight light source is not necessary, and thus power consumption can be more efficiently reduced.
  • the display device according to each embodiment of the present invention can be applied to, for example, a head-mounted display device that enlarges the display by an eyepiece arranged in front of the screen and displays the screen in the entire human field of view. It is.
  • the display device is a high-definition display device as compared with a conventional display device.
  • the display device according to the embodiment of the present invention desirably has a definition of 450 to 1000 ppi or more.
  • the display device When the display device has a high definition, the number of pixels increases as the definition increases, and a high-speed response is required, so that the power consumption of the display device also increases. For this reason, by applying the display device according to each embodiment of the present invention, the display device can reduce the power consumption of the display device and reduce the influence on the recognition of the display to the user, and can perform the power consumption more efficiently.
  • the display device according to each embodiment of the present invention includes a TFT including a TFT element including an oxide semiconductor including In, Ga, Zn, and O in order to realize faster response and power saving.
  • a substrate may be provided.
  • the display method of the display device according to aspect 1 is a display method of a display device that is worn by a user and displays a screen in the entire field of view of the user, from the gazing point that the user watches in the screen.
  • the maximum luminance of the screen is monotonously decreased, and the position at which the maximum luminance of the screen is decreased is dynamically changed according to the movement of the gazing point.
  • the display brightness of the screen is reduced according to the rate of reduction of the maximum brightness.
  • the gazing point is specified using a line-of-sight tracking device.
  • the starting position of the decrease in the maximum brightness of the screen is closer to the point of interest in the vertical direction than in the horizontal direction toward the screen.
  • the rate of decrease in the maximum luminance of the screen is increased in the vertical direction rather than in the horizontal direction toward the screen.
  • the decrease in the maximum luminance is symmetric with respect to the gazing point in the horizontal direction toward the screen.
  • the decrease in the maximum luminance is symmetric with respect to the gazing point in the vertical direction toward the screen.
  • the maximum brightness of the screen is reduced from a position at a viewing angle of 40 degrees to 50 degrees from the gazing point in the horizontal direction toward the screen.
  • the maximum brightness of the screen is reduced from a position at a viewing angle of 30 degrees or more and 50 degrees or less from the gazing point in the vertical direction toward the screen.
  • the maximum luminance from the position of the viewing angle of 50 degrees or more to the edge of the screen in the horizontal direction is set to 60% of the maximum luminance at the center of the screen.
  • the maximum luminance from the position of the viewing angle of 50 degrees or more to the edge of the screen in the vertical direction is set to 50% of the maximum luminance at the center of the screen.
  • the display device includes a backlight light source, and the maximum luminance of the screen is reduced by dynamically controlling the light emission intensity of the backlight light source.
  • the maximum luminance of the screen is reduced by dynamically controlling the current flowing through the backlight light source.
  • the maximum luminance of the screen is reduced by dynamically controlling the light emission time of the backlight light source.
  • the display brightness of the screen is controlled by controlling the intensity of the backlight light source.
  • the display device includes a display panel including a plurality of light emitting elements, and the maximum brightness of the screen is reduced by dynamically controlling the brightness of each of the light emitting elements of the display panel.
  • the display device of aspect 17 is a display device that is worn by a user and displays a screen in the entire field of view of the user, and in the direction from the gazing point that the user gazes to the periphery of the screen, The maximum brightness of the screen decreases monotonously, and the position where the maximum brightness of the screen decreases dynamically according to the movement of the point of interest.
  • a gaze tracking device is provided, and the gazing point is specified using the gaze tracking device.
  • a head-mounted display device includes the display device.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Nonlinear Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Chemical & Material Sciences (AREA)
  • Optics & Photonics (AREA)
  • Mathematical Physics (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

L'objet de la présente invention est de fournir un procédé d'affichage rendant difficile, pour un utilisateur, l'identification d'une réduction de luminance d'un écran d'affichage. L'invention concerne un procédé d'affichage pour un dispositif d'affichage (1), le procédé consistant à : réduire de manière monotone la luminance maximale d'un écran dans une direction à partir du point de regard de l'utilisateur (o) vers l'environnement circonvoisin de l'écran ; et modifier dynamiquement la position de sorte à réduire la luminance maximale de l'écran en fonction du mouvement du point de regard.
PCT/JP2018/009531 2017-03-17 2018-03-12 Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif de visiocasque WO2018168781A1 (fr)

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JP2017053120 2017-03-17
JP2017-053120 2017-03-17

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WO2018168781A1 true WO2018168781A1 (fr) 2018-09-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022076239A1 (fr) * 2020-10-05 2022-04-14 Facebook Technologies, Llc Procédés de commande de sources de lumière dans un écran d'affichage près de l'œil
WO2022178043A1 (fr) * 2021-02-18 2022-08-25 Meta Platforms Technologies, Llc Commande dynamique de multiples parties d'un dispositif d'affichage à l'aide de différents cycles de service
US11727892B1 (en) 2022-11-09 2023-08-15 Meta Platforms Technologies, Llc Eye-tracking based foveation control of displays

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05328258A (ja) * 1992-05-26 1993-12-10 Olympus Optical Co Ltd 頭部装着型ディスプレイ
JP2007067313A (ja) * 2005-09-02 2007-03-15 Sharp Corp Ｌｅｄバックライト装置及び該装置を備える画像表示装置
US20080111833A1 (en) * 2006-11-09 2008-05-15 Sony Ericsson Mobile Communications Ab Adjusting display brightness and/or refresh rates based on eye tracking
JP2016184058A (ja) * 2015-03-26 2016-10-20 Ｎｅｃディスプレイソリューションズ株式会社 表示装置、表示方法、および表示プログラム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05328258A (ja) * 1992-05-26 1993-12-10 Olympus Optical Co Ltd 頭部装着型ディスプレイ
JP2007067313A (ja) * 2005-09-02 2007-03-15 Sharp Corp Ｌｅｄバックライト装置及び該装置を備える画像表示装置
US20080111833A1 (en) * 2006-11-09 2008-05-15 Sony Ericsson Mobile Communications Ab Adjusting display brightness and/or refresh rates based on eye tracking
JP2016184058A (ja) * 2015-03-26 2016-10-20 Ｎｅｃディスプレイソリューションズ株式会社 表示装置、表示方法、および表示プログラム

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022076239A1 (fr) * 2020-10-05 2022-04-14 Facebook Technologies, Llc Procédés de commande de sources de lumière dans un écran d'affichage près de l'œil
US11686945B2 (en) 2020-10-05 2023-06-27 Meta Platforms Technologies, Llc Methods of driving light sources in a near-eye display
WO2022178043A1 (fr) * 2021-02-18 2022-08-25 Meta Platforms Technologies, Llc Commande dynamique de multiples parties d'un dispositif d'affichage à l'aide de différents cycles de service
US11727892B1 (en) 2022-11-09 2023-08-15 Meta Platforms Technologies, Llc Eye-tracking based foveation control of displays

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