WO2018168781A1 - Display method for display device, display device, and head-mount display device - Google Patents

Display method for display device, display device, and head-mount display device Download PDF

Info

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
Authority
WO
WIPO (PCT)
Prior art keywords
display device
screen
display
maximum luminance
gazing point
Prior art date
Application number
PCT/JP2018/009531
Other languages
French (fr)
Japanese (ja)
Inventor
奈留 臼倉
裕一 神林
Original Assignee
シャープ株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by シャープ株式会社 filed Critical シャープ株式会社
Publication of WO2018168781A1 publication Critical patent/WO2018168781A1/en

Links

Images

Classifications

    • 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.

Landscapes

  • 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

The purpose of the present invention is to realize a display method which makes it difficult for a user to identify a reduction in luminance of a display screen. Provided is a display method for a display device (1), the method comprising: monotonously reducing the maximum luminance of a screen in a direction from a user's gazing point (o) toward the surroundings in the screen; and dynamically changing the position for reducing the maximum luminance of the screen according to the movement of the gazing point.

Description

表示装置の表示方法、表示装置、ヘッドマウントディスプレイデバイスDisplay method for display device, display device, and head mounted display device
　本発明は表示装置の表示方法、表示装置、およびヘッドマウントディスプレイデバイスに関する。 The present invention relates to a display method for a display device, a display device, and a head-mounted display device.
　特許文献１には、画面中心部の明るさを維持しつつ、使用者が比較的注視しない画面周辺部の明るさを低下させることで、表示画面の明るさ感を維持したまま、消費電力を削減する手法が開示されている。 In 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.
日本国公開特許公報「特開２００７－１０４３７７号公報（２００７年４月１９日公開）」Japanese Patent Publication “Japanese Patent Laid-Open No. 2007-104377” (published on April 19, 2007)
　発明者は、拡大された表示画面を使用者が直視する表示装置においては、特許文献１に記載の手法のように、周囲に向けて表示装置の光量を単純に下げるよりも、より使用者に表示画面の輝度低下が認知されにくい表示方法を見出した。 In the display device in which the user looks directly at the enlarged display screen, 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. We found a display method that makes it difficult for the brightness drop on the display screen to be recognized.
　上記の課題を解決するために、本発明に係る表示装置の表示方法は、使用者が装着し、該使用者の視界全体に画面を表示する表示装置の表示方法であって、前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度を単調に低下させ、前記注視点の移動に応じて、前記画面の最大輝度を低下させる位置を動的に変化させる。 In order to solve the above problems, a display method of a display device according to the present invention 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. In the direction from the gazing point that the user gazes to the surroundings, 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. Let
　また、上記の課題を解決するために、本発明に係る表示装置は、使用者が装着し、該使用者の視界全体に画面を表示する表示装置であって、前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度が単調に低下し、前記注視点の移動に応じて、前記画面の最大輝度が低下する位置が動的に変化する。 In order to solve the above-described problem, a display device according to the present invention 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.
　本発明によれば、表示輝度を低下させても、使用者に表示輝度の低下を認知されにくい、表示装置の表示方法を提供できる。 According to 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.
本発明の実施形態１に係る表示装置の表示方法を示す図である。It is a figure which shows the display method of the display apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態１に係る表示装置の透過上面図および断面図である。It is the permeation | transmission top view and sectional drawing of the display apparatus which concern on Embodiment 1 of this invention. 本発明の実施形態１に係る視線追跡装置による、注視点の特定方法を説明する図である。It is a figure explaining the identification method of the gaze point by the gaze tracking device concerning Embodiment 1 of the present invention. 比較形態に係る表示装置の表示方法を示す図である。It is a figure which shows the display method of the display apparatus which concerns on a comparison form. 本発明の実施形態１に係る表示装置の表示方法の他の例を説明する図である。It is a figure explaining the other example of the display method of the display apparatus which concerns on Embodiment 1 of this invention. 本発明の実施形態２に係る表示装置の透過上面図および断面図である。It is the permeation | transmission top view and sectional drawing of the display apparatus which concern on Embodiment 2 of this invention. 本発明の実施形態３に係る表示装置の表示方法を示す図である。It is a figure which shows the display method of the display apparatus which concerns on Embodiment 3 of this invention.
　以下、本発明の実施形態に沿って説明を行う。なお、本発明の図面において、表示装置の表示面側を上面とし、バックライト光源側を下面として示す。また、説明の便宜上、それぞれの実施形態にて説明した部材と同じ機能を有する部材については、異なる実施形態においても同じ符号を付記し、その説明を省略する。 Hereinafter, description will be made along the embodiment of the present invention. In the drawings of the present invention, the display surface side of the display device is shown as an upper surface, and the backlight source side is shown as a lower surface. For convenience of explanation, 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.
　本発明のそれぞれの実施形態に係る表示装置は、使用者が装着し、使用者の視界全体に画面の表示をおこなう表示装置である。例えば、表示装置を使用者の頭部に固定し、レンズによって画面を拡大し、拡大された画面を使用者に表示することにより、表示装置が使用者に画面の表示を行ってもよい。 The display device according to each embodiment of the present invention is a display device that is worn by a user and displays a screen on the entire field of view of the user. For example, 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.
　〔実施形態１〕
　図２は、本発明の実施形態１に係る表示装置１を示す図である。図２の（ａ）は、表示装置１の上面図であり、図２の（ｂ）は、図２の（ａ）における、表示装置１のＣ１Ｃ２線矢視断面図である。なお、図２の（ａ）においては、表示パネル１０の上面の偏光板１３の図示を省略している。 Embodiment 1
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, and FIG. 2B is a cross-sectional view taken along the line C1C2 of the display device 1 in FIG. In FIG. 2A, illustration of the polarizing plate 13 on the upper surface of the display panel 10 is omitted.
　図２に示すように、本実施形態に係る表示装置１は、表示パネル１０と、表示パネル１０の下面に配置されたバックライト光源２０と、目線追跡装置３０とを備える。本実施形態においては、表示パネルが液晶パネルである例を挙げているが、これに限られず、例えば、ＭＥＭＳを使用した表示パネルであってもよい。 As shown in FIG. 2, the display device 1 according to the present embodiment 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. In the present embodiment, an example in which the display panel is a liquid crystal panel is given, but the present invention is not limited to this, and for example, a display panel using MEMS may be used.
　表示パネル１０は、制御基板１１（ＴＦＴ基板）とカラーフィルタ基板１２とが、カラーフィルタ基板１２を表示面側として、対向して貼りあわされて構成される。制御基板１１のバックライト光入射側と、カラーフィルタ基板１２の表示面側には、それぞれ偏光板１３が貼り付けられている。 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.
　バックライト光源２０は、発光素子２１（ＬＥＤ素子）と、拡散板２２と、反射板２３とを備える。発光素子２１は反射板２３上に２次元的に配置され、拡散板２２の下方から、表示パネル１０へ向かって発光する。発光素子２１からの発光の強度は、発光素子２１に流れる電流によって制御できる。拡散板２２は発光素子２１からの光を、表示パネル１０の表示面に拡散させる。反射板２３は、発光素子２１からの光のうち、表示パネル１０側とは逆側に放射された光を反射し、表示装置１の表示効率を向上させる。なお、本実施形態においては、発光素子２１が計１６個形成されているが、発光素子２１の個数はこれに限られない。 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. In the present embodiment, a total of 16 light emitting elements 21 are formed, but the number of light emitting elements 21 is not limited to this.
　図２においては、導光板２２の端部に発光素子２１が、２１ａ～２１ｄまで４つ形成されたものを示している。しかし、発光素子２１の個数はこれに限られない。また、表示パネル１０とバックライト光源２０との寸法および形状は、図２に記載されたものに限られず、円形などの異形ディスプレイであってもよい。 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. FIG. However, the number of the light emitting elements 21 is not limited to this. Further, 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.
　図３に示すように、視線追跡装置３０は、表示装置１の使用者が、表示装置１の画面のうちどの位置を注視しているかを特定する装置である。視線追跡装置３０は、例えば、赤外線発光素子３１と赤外線カメラ３２とを備える。視線追跡装置３０は、赤外線発光素子３１により、使用者の眼球に赤外光を照射し、角膜において反射された赤外光と、使用者の瞳孔とを赤外線カメラ３２によって撮影してもよい。これにより、視線追跡装置３０は、角膜において反射された赤外光と、使用者の瞳孔との相対位置から、表示装置１の画面上において使用者が注視している点を特定してもよい。 As shown in FIG. 3, 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. .
　以下、本明細書において、表示装置１の画面上において使用者が注視している点を、注視点と称する。 Hereinafter, in this specification, the point on which the user is gazing on the screen of the display device 1 is referred to as a gazing point.
　ここで、比較形態の表示装置を用いて、従来採用されている表示装置の表示方法について説明する。図４は比較形態の表示装置と、比較形態の表示装置の表示方法とを説明するための図である。なお、図４においては、表示装置が常時白画面を表示している場合を示す。すなわち、図４の表示装置は、画面の何れの場所においても、当該位置における最大輝度の表示を行っているものとする。 Here, a display method of a display device that has been conventionally employed will be described using a comparative display device. 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.
　比較形態の表示装置の上に示すグラフは、比較形態の表示装置の水平方向の位置とその位置における表示輝度との関係を示す。比較形態の表示装置の右に示すグラフは、比較形態の表示装置の垂直方向の位置とその位置における表示輝度との関係を示す。これらのグラフと表示装置１とに示す、Ａ１、Ａ２、Ｂ１、およびＢ２はそれぞれ対応している。すなわち、比較形態の表示装置の上に示すグラフは、比較形態の表示装置の中心を通るＡ１からＡ２を結ぶ線上における、輝度の位置依存を示す。同じく、比較形態の表示装置の右に示すグラフは、比較形態の表示装置の中心を通るＢ１からＢ２を結ぶ線上における、輝度の位置依存を示す。 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. Similarly, 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.
　比較形態の表示装置は、本実施形態の表示装置１と同じく、表示パネルとバックライト光源とを備える。従来の表示装置のバックライト光源には、一般的に、画面全体における輝度が略均一に保たれるものが使用される。例えば、表示装置の画面の最外周５～１０ｍｍを除いた面内の輝度は、最低輝度と最高輝度との差が２０％以内に抑えられている。 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. In general, 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.
　図４において、比較形態の表示装置が液晶パネルを備える構成を挙げたが、比較形態の表示装置は液晶パネルの代わりに、ＯＬＥＤパネルを備えていてもよい。比較形態の表示装置がＯＬＥＤパネルを備える場合においても、一般的に、画面全体において輝度が略均一に保たれるものが使用される。 4, the configuration in which the display device of the comparative form includes a liquid crystal panel has been described. However, the display device of the comparative form may include an OLED panel instead of the liquid crystal panel. Even in the case where 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.
　次に、本実施形態の表示装置１の表示方法について説明する。図１は、本実施形態に係る表示装置１の表示方法を説明するための図である。なお、図１においては、表示装置１が常時白画面を表示している場合を示す。すなわち、図１の表示装置１は、画面の何れの場所においても、当該位置における最大輝度の表示を行っているものとする。 Next, a display method of the display device 1 of the present embodiment will be described. 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.
　図１において、点Ｏは注視点を示す。表示装置１の上および右に示すグラフは、注視点を通る、Ａ１からＡ２およびＢ１からＢ２を結ぶ線上における、輝度の位置依存を示す。 In FIG. 1, 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.
　本実施形態の表示装置１のように、表示装置１を使用者が装着し、該使用者の視界全体に画面を表示する場合、表示装置１と使用者の目との距離は制限される。また、使用者は主に使用者の眼球運動によって、表示装置１の画面を見渡すこととなる。このため、使用者が認知できる表示装置１の画面の範囲は、使用者の眼球の運動に依存することとなる。また、使用者が画面上のある１点を注視する場合、使用者が認知できる表示装置１の画面の範囲は、使用者が注視する点の周囲に制限される。したがって、表示装置１の画面全体にわたって、輝度を一定に保つ必要はない。例えば、使用者が認知しにくい注視点から離れた周囲においては、ある程度輝度を低下させても、あまり輝度低下を認知されにくい。 When the user wears the display device 1 and displays a screen in the entire field of view of the user like the display device 1 of the present embodiment, 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.
　本実施形態の表示装置１は、表示装置１の画面の注視点近くよりも注視点の周囲の方が、最大輝度が低くなるように設計されている。これにより、表示装置１の消費電力を抑えつつ、使用者に輝度低下を認知されにくい構成を実現する。図１においては、上述の、注視点の周囲に向かって最大輝度が低下する表示装置１の具体的な表示方法について説明する。 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. Thus, 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. In 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.
　表示装置１の上に示すグラフを参照すると、表示装置１の最大輝度は、注視点から表示装置１の画面に向かって左方にｄＬだけ離れた位置Ｌから、周囲の方向、すなわちＡ１の方向にむかって単調に低下し始めている。同じように、表示装置１の最大輝度は、注視点から表示装置１の画面に向かって右方にｄＲだけ離れた位置Ｒから、周囲の方向、すなわちＡ２の方向にむかって単調に低下し始めている。 Referring to the graph shown on the display device 1, 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.
　また、表示装置１の右に示すグラフを参照すると、表示装置１の最大輝度は、注視点から表示装置１の画面に向かって上方にｄＵだけ離れた位置Ｕから、周囲の方向、すなわちＢ１の方向にむかって単調に低下し始めている。同じように、表示装置１の最大輝度は、注視点から表示装置１の画面に向かって下方にｄＤだけ離れた位置Ｄから、周囲の方向、すなわちＢ２の方向にむかって単調に低下し始めている。 Further, referring to the graph shown on the right side of the display device 1, 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. .
　すなわち、表示装置１の注視点から周囲に向かう方向において、表示装置１の画面のある位置から周囲にかけて、表示装置１の最大輝度が低下し始めている。図１においては、Ａ１とＡ２との間およびＢ１とＢ２との間、すなわち、表示装置１の画面の注視点を通る水平および垂直の位置に対応する最大輝度を示す。しかし、本実施形態においては、Ｌ、Ｕ、Ｒ、Ｄを結ぶ略楕円の位置Ｅから周囲にかけて最大輝度が低下している。 That is, in the direction from the gazing point of the display device 1 toward the periphery, 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. In FIG. 1, 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. However, in the present embodiment, the maximum luminance decreases from the position E of the substantially ellipse connecting L, U, R, and D to the periphery.
　本実施形態の表示装置１においては、最大輝度が低下し始める位置が、注視点の移動と平行して移動してもよい。これにより、表示装置１は、注視点の周囲においては常に最大輝度が低減された表示を行うことが可能である。 In the display device 1 of the present embodiment, the position where the maximum luminance starts to decrease may move in parallel with the movement of the gazing point. Thereby, the display device 1 can always perform display with the maximum luminance reduced around the gazing point.
　人の瞳の可動範囲は、個人差があるものの、瞳の中心から上下左右３０度程度である。このため、人の視覚には、視野の中心から上下左右３０度程度の視野角度内の認知に優れるという特性がある。この特性に応じ、使用者の注視点から上下左右３０度程度の視野角度を超えた画面の位置から表示装置１の最大輝度を低下させることにより、輝度低下が認知されにくい表示装置１を実現できる。これは、例えば、注視点が画面の中央から端部へ、あるいは端部から中央へ移動した場合、注視点の移動に最大輝度の変化が十分に追従できない場合であっても、注視点の最大輝度は変化しないため、使用者が輝度低下を認知しにくいことによる。 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. . For example, if 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.
　ここで、本実施形態においては、ｄＬとｄＲとは、いずれもｄＵおよびｄＤの両方よりも長い。すなわち、表示装置１の最大輝度は、表示装置１の画面に向かって水平方向よりも垂直方向の方が、低下の開始位置が注視点に近い。 Here, in this embodiment, dL and dR are both longer than both dU and dD. In other words, 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.
　人の視覚には、垂直方向よりも水平方向の認知に優れるという特性がある。したがって、この特性に応じ、水平方向よりも垂直方向において、最大輝度の低下の開始位置を注視点に近くさせることにより、輝度低下がさらに認知されにくい表示装置１を実現できる。同様に、水平方向よりも垂直方向の方が、最大輝度の低下の割合を大きくすることによっても、輝度低下の認知がされにくい表示装置１を実現できる。 人 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.
　具体的には、表示装置１の画面の水平方向においては、注視点から視野角４０度以上５０度以下の画面の位置において表示装置１の最大輝度を徐々に下げ始めてもよい。また、表示装置１の画面の水平方向における、最外周（例えば注視点から視野角５０度）の位置において、表示装置１の最大輝度を注視点の最大輝度の６０％としてもよい。また、表示装置１の画面の垂直方向においては、注視点から視野角３０度以上５０度以下の画面の位置において表示装置１の最大輝度を徐々に下げ始めてもよい。また、表示装置１の画面の垂直方向における、最外周（例えば注視点から視野角５０度）の位置において、表示装置１の最大輝度を注視点の最大輝度の５０％としてもよい。 Specifically, in the horizontal direction of the screen of the display device 1, 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. Further, 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.
　上記を実現する具体的構成として、バックライト光源２０の発光強度を動的に変化させる構成が挙げられる。バックライト光源２０の発光強度の変化の方法としては、それぞれの発光素子２１に流れる電流を動的に制御することにより、それぞれの発光素子２１の発光強度を変化させる構成が挙げられる。例えば、注視点周囲側の発光素子２１ａに流れる電流値を、注視点近傍側の発光素子２１ｂに流れる電流値の６０％とすることにより、表示装置１の注視点周囲の最大輝度を低下させてもよい。また、注視点の移動に応じて、それぞれの発光素子２１に流れる電流を動的に変化させてもよい。 As a specific configuration for realizing the above, there is a configuration in which the light emission intensity of the backlight light source 20 is dynamically changed. As a method for changing the light emission intensity of the backlight light source 20, there is a configuration in which 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.
　または、それぞれの発光素子２１に流れる電流のパルス幅を動的に制御することにより、それぞれの発光素子２１の発光時間を変化させる構成であってもよい。例えば、注視点周囲側の発光素子２１ａに流れる電流のパルス幅を、注視点近傍側の最大輝度において発行する発光素子２１ｂに流れる電流のパルス幅の６０％とすることにより、表示装置１の注視点周囲の最大輝度を低下させてもよい。上記パルス幅は、注視点の移動に応じて、動的に変化してもよい。 Alternatively, 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. For example, 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.
　なお、ｄＬとｄＲとの長さ、およびｄＵとｄＤとの長さは、異なっていてもよい。しかし、本実施形態においては、ｄＬとｄＲとの長さ、およびｄＵとｄＤとの長さが等しい構成を例として挙げている。すなわち、表示装置１の最大輝度の低下が、Ａ１Ａ２線、およびＢ１Ｂ２線に対して軸対称に発生している。上記構成であれば、輝度低下が注視点に対して対称に発生するため、より使用者に輝度低下を認知されにくい表示装置１を提供できる。 Note that the lengths of dL and dR and the lengths of dU and dD may be different. However, in the present embodiment, a configuration in which the lengths of dL and dR and the lengths of dU and dD are equal is given as an example. In other words, 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 | luminance fall generate | occur | produces symmetrically with respect to a gazing point, the display apparatus 1 which is hard to recognize a brightness fall by a user more can be provided.
　本実施形態に係る表示装置１は、画面上の最大輝度が低減された位置において、最大輝度を超える輝度の表示が必要である画像の信号が入力された場合、最大輝度まで表示輝度を減じて表示を行う。すなわち、最大輝度を超えない輝度の表示が必要である画像の信号が入力された場合には、表示装置１は輝度を減じることなく表示を行ってもよい。 The display device 1 according to the present embodiment 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.
　また、上記構成に限られず、本実施形態に係る表示装置１は、最大輝度が低減された位置において、当該位置における最大輝度の低減の割合に応じて、全ての表示の輝度を、最大輝度の低減の割合と同じ割合において低減してもよい。これにより、比較的表示輝度の低下を使用者に認知されにくいまま、さらに消費電力を低減する表示方法が提供される。 In addition, 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.
　ここで、表示装置１においては、発光素子２１の発光強度を個別に変化させることにより、表示装置２の画面の任意の領域において、表示パネル１０の透光率を下げることなく、表示装置２の画面の表示輝度を低下させることが可能である。このため、表示装置２は、表示パネル１０の透光率をできるだけ下げることなく、バックライト光源２０の発光強度を低下させて、輝度の低い表示を行うことができる。したがって、本実施形態の表示装置１は、バックライト光源２０の発光強度を制御することにより、表示輝度を制御する、いわゆるエリアアクティブ駆動を使用した表示を行うことが可能である。 Here, in the display device 1, 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.
　例えば、図５の円において示す表示輝度は、表示装置２の最大の表示輝度の５０％である。図５の円において示す位置の表示において、エリアアクティブ駆動を使用しない比較例の表示装置と、エリアアクティブ駆動を使用する表示装置１との違いを、下記表１を用いて説明する。 For example, 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.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　表１の「パネル透光率」の欄は、図５の円において示す位置における、それぞれの表示装置の表示パネルにおけるバックライト光の透光率を示す。表１の「バックライト強度」の欄は、図５の円において示す位置における、それぞれの表示装置のバックライト光の強度を示す。表１の「表示輝度」の欄は、図５の円において示す位置における、それぞれの表示装置の実際の表示輝度を示す。 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.
　比較例の表示装置においては、５０％の表示輝度を達成するために、バックライト強度を最大から下げずに、表示パネル１０の透光率を最大の５０％とする。すなわち、比較例の表示装置は、バックライト光源からの光が表示パネルを透過する割合が５０％となるように、制御基板１１の制御を通じて液晶を制御する。一方、本実施形態の表示装置１においては、５０％の表示輝度を達成するために、表示パネル１０の透光率を最大に維持したまま、バックライト強度を最大の５０％とする。 In the display device of the comparative example, in order to achieve a display luminance of 50%, 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%. On the other hand, in the display device 1 of the present embodiment, in order to achieve a display luminance of 50%, the backlight intensity is set to the maximum 50% while maintaining the light transmittance of the display panel 10 at the maximum.
　このため、表示装置１は比較例の表示装置と比較して、特に低輝度の表示時であっても、表示パネルの表示階調を維持したまま、バックライト光の強度をさらに低下させることが可能である。したがって、本実施形態の表示装置１は、エリアアクティブ駆動を使用して表示を行うことにより、より低消費電力を実現した表示を行うことができる。 For this reason, 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.
　〔実施形態２〕
　図６は実施形態２に係る表示装置２を示す図である。図６の（ａ）は表示装置２の上面図であり、図６の（ｂ）は、図６の（ａ）における、表示装置２のＣ１Ｃ２線矢視断面図である。 [Embodiment 2]
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, and FIG. 6B is a cross-sectional view taken along the line C1C2 of the display device 2 in FIG.
　本実施形態の表示装置２は、表示装置１および２と比較して、表示パネル１０およびバックライト光源２０の代わりに、表示パネル４０を備える。表示パネル４０は、制御基板４１と複数の発光素子４２とを備える。制御基板４１は、例えばＴＦＴ基板を備え、発光素子４２それぞれに流れる電流を制御することにより、発光素子４２それぞれの発光を制御する。 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.
　発光素子４２は、制御基板４１の上面側に２次元的に配置される。発光素子４２の配置方法は特に限定されないが、例えば、制御基板４１に、マトリクス状に配置されていてもよい。図６においては、表示パネル４０の四隅および中央に、発光素子４２を図示するが、これら以外にも、発光素子４２が配置されていてもよい。発光素子４２は制御基板４１の制御によりそれぞれ独立して発光し、表示パネル４０の画素として機能する。発光素子４２は、流れる電流の強度により発光強度が変化する。発光素子４２は特に制限されないが、例えば、有機ＥＬ素子を含んでいてもよい。 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. For example, 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.
　本実施形態に係る表示装置２の制御基板４１は、発光素子４２のそれぞれに流れる電流を独立して制御することが可能である。このため、発光素子４２に流れる電流の上限を制限することにより、表示装置２の最大表示輝度を画素ごとに設定することが可能である。 The control board 41 of the display device 2 according to the present embodiment 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.
　次に、本実施形態の表示装置２の表示方法について説明する。図７は、本実施形態に係る表示装置２の表示方法を説明するための図である。なお、図７においては、表示装置２が常時白画面を表示している場合を示す。 Next, a display method of the display device 2 of the present embodiment will be described. 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.
　表示装置２の上および右に示すグラフは、図１の表示装置１の上および右に示すグラフと同じく、表示装置２の注視点を通るＡ１からＡ２およびＢ１からＢ２を結ぶ線上における、最大輝度の位置依存を示す。 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.
　前実施形態の表示装置１と同様に、表示装置２の注視点から周囲方向に向かう方向において、表示装置２の画面のある位置から周囲にかけて、表示装置２の最大輝度が低下し始めている。本実施形態においても、Ｌ、Ｕ、Ｒ、Ｄを結ぶ略楕円の位置Ｅから周囲にかけて最大輝度が低下している。 As in the display device 1 of the previous embodiment, 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.
　本実施形態の表示装置２においても、前実施形態と同様に、ｄＬとｄＲとは、いずれもｄＵおよびｄＤの両方よりも長い。すなわち、表示装置２の最大輝度は、表示装置２の画面に向かって水平方向よりも垂直方向の方が、低下の開始位置が注視点に近い。 Also in the display device 2 of the present embodiment, as in the previous embodiment, dL and dR are both longer than both dU and dD. In other words, 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.
　上記を実現する具体的構成として、発光素子４２の発光強度を動的に変化させる構成が挙げられる。発光素子４２の発光強度を変化させる方法としては、それぞれの発光素子４２に流れる電流を制御することにより、それぞれの発光素子４２の発光強度を変化させる構成が挙げられる。例えば、注視点周囲側の発光素子４２ａに流れる電流値を、注視点近傍側の発光素子４２ｂに流れる電流値よりも低くすることにより、表示装置１の注視点周囲の最大輝度を低下させてもよい。上記電流値は、注視点の移動に応じて、動的に変化してもよい。上記構成であれば、バックライト光源が不要となるため、より効率的に消費電力の低下を実現することが可能である。 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. As 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.
　本発明のそれぞれの実施形態に係る表示装置は、例えば、画面の正面に配された接眼レンズによって表示を拡大し、人の視界全体に画面を表示する、ヘッドマウントディスプレイデバイスに適用することが可能である。画面の拡大を行う場合には、従来の表示装置と比較して高精細の表示装置であることが好ましい。例えば、本発明の実施形態に係る表示装置は、精細度が４５０～１０００ｐｐｉ、またはそれ以上であることが望ましい。 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. In the case of enlarging the screen, it is preferable that the display device is a high-definition display device as compared with a conventional display device. For example, the display device according to the embodiment of the present invention desirably has a definition of 450 to 1000 ppi or more.
　表示装置が高精細である場合、精細度の増加に伴い、画素数が増加し、高速応答が求められるために、表示装置の消費電力も増加する。このため、本発明のそれぞれの実施形態に係る表示装置を適用することにより、表示装置の消費電力を、使用者に対する表示の認知への影響を低減しつつ、消費電力をより効率的に行える表示装置を実現可能である。なお、本発明のそれぞれの実施形態に係る表示装置は、より高速応答化および省電力化を実現するために、Ｉｎ、Ｇａ、Ｚｎ、およびＯを含む酸化物半導体を含むＴＦＴ素子を備えたＴＦＴ基板を備えていてもよい。 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. A device is feasible. In addition, 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.
　〔まとめ〕
　態様１の表示装置の表示方法は、使用者が装着し、該使用者の視界全体に画面を表示する表示装置の表示方法であって、前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度を単調に低下させ、前記注視点の移動に応じて、前記画面の最大輝度を低下させる位置を動的に変化させる。 [Summary]
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. In the direction toward the periphery, 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.
　態様２においては、前記最大輝度の低下の割合に応じて、前記画面の表示輝度を低下させる。 In aspect 2, the display brightness of the screen is reduced according to the rate of reduction of the maximum brightness.
　態様３においては、前記注視点を、視線追跡装置を使用して特定する。 In aspect 3, the gazing point is specified using a line-of-sight tracking device.
　態様４においては、前記画面に向かって水平方向よりも垂直方向において、前記画面の最大輝度の低下の開始位置が、前記注視点に近い。 In aspect 4, 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.
　態様５においては、前記画面に向かって水平方向よりも垂直方向において、前記画面の最大輝度の低下の割合を大きくする。 In aspect 5, 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.
　態様６においては、前記最大輝度の低下が、前記画面に向かって水平方向において、前記注視点に対して対称である。 In aspect 6, the decrease in the maximum luminance is symmetric with respect to the gazing point in the horizontal direction toward the screen.
　態様７においては、前記最大輝度の低下が、前記画面に向かって垂直方向において、前記注視点に対して対称である。 In aspect 7, the decrease in the maximum luminance is symmetric with respect to the gazing point in the vertical direction toward the screen.
　態様８においては、前記画面に向かって水平方向において、前記注視点から視野角４０度以上５０度以下の位置から、前記画面の最大輝度を低下させる。 In aspect 8, 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.
　態様９においては、前記画面に向かって垂直方向において、前記注視点から視野角３０度以上５０度以下の位置から、前記画面の最大輝度を低下させる。 In aspect 9, 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.
　態様１０においては、前記画面に向かって水平方向において、前記注視点から視野角５０度以上の位置から前記画面の端部までの最大輝度を、前記画面の中央の最大輝度の６０％とする。 In aspect 10, in the horizontal 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.
　態様１１においては、前記画面に向かって垂直方向において、前記注視点から視野角５０度以上の位置から前記画面の端部までの最大輝度を、前記画面の中央の最大輝度の５０％とする。 In aspect 11, 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 vertical direction is set to 50% of the maximum luminance at the center of the screen.
　態様１２においては、表示装置がバックライト光源を備え、該バックライト光源の発光強度を動的に制御することにより、前記画面の最大輝度の低下を実現する。 In the twelfth aspect, 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.
　態様１３においては、前記バックライト光源に流れる電流を動的に制御することにより、前記画面の最大輝度を低下させる。 In aspect 13, the maximum luminance of the screen is reduced by dynamically controlling the current flowing through the backlight light source.
　態様１４においては、前記バックライト光源の発光時間を動的に制御することにより、前記画面の最大輝度を低下させる。 In aspect 14, the maximum luminance of the screen is reduced by dynamically controlling the light emission time of the backlight light source.
　態様１５においては、前記バックライト光源の強度を制御することにより、前記画面の表示輝度を制御する。 In aspect 15, the display brightness of the screen is controlled by controlling the intensity of the backlight light source.
　態様１６においては、表示装置が複数の発光素子を含む表示パネルを備え、該表示パネルの前記発光素子のそれぞれの輝度を動的に制御することにより、前記画面の最大輝度を低下させる。 In Aspect 16, 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.
　態様１７の表示装置は、使用者が装着し、該使用者の視界全体に画面を表示する表示装置であって、前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度が単調に低下し、前記注視点の移動に応じて、前記画面の最大輝度が低下する位置が動的に変化する。 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.
　態様１８においては、視線追跡装置を備え、前記注視点を、前記視線追跡装置を使用して特定する。 In aspect 18, a gaze tracking device is provided, and the gazing point is specified using the gaze tracking device.
　態様１９のヘッドマウントディスプレイデバイスは、前記表示装置を備える。 A head-mounted display device according to aspect 19 includes the display device.
　本発明は上述した各実施形態に限定されるものではなく、請求項に示した範囲で種々の変更が可能であり、異なる実施形態にそれぞれ開示された技術的手段を適宜組み合わせて得られる実施形態についても本発明の技術的範囲に含まれる。さらに、各実施形態にそれぞれ開示された技術的手段を組み合わせることにより、新しい技術的特徴を形成することができる。 The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention. Furthermore, a new technical feature can be formed by combining the technical means disclosed in each embodiment.
　１、２　　　表示装置
　１０、４０　表示パネル
　１１、４１　制御基板
　２０　　　　バックライト光源
　２１、４２　発光素子
　３０　　　　視線追跡装置 DESCRIPTION OF SYMBOLS 1, 2 Display apparatus 10, 40 Display panel 11, 41 Control board 20 Backlight light source 21, 42 Light emitting element 30 Eye tracking apparatus

Claims (19)

  1. 　使用者が装着し、該使用者の視界全体に画面を表示する表示装置の表示方法であって、
    　前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度を単調に低下させ、前記注視点の移動に応じて、前記画面の最大輝度を低下させる位置を動的に変化させることを特徴とする表示装置の表示方法。     A display method for a display device that is worn by a user and displays a screen in the entire field of view of the user,
    Among the screens, in a direction from the gazing point that the user gazes to the surroundings, a position where the maximum luminance of the screen is monotonously decreased and the maximum luminance of the screen is decreased according to the movement of the gazing point. A display method for a display device, wherein the display device is dynamically changed.
  2. 　前記最大輝度の低下の割合に応じて、前記画面の表示輝度を低下させることを特徴とする請求項１に記載の表示装置の表示方法。 The display method of a display device according to claim 1, wherein the display brightness of the screen is reduced in accordance with the rate of reduction of the maximum brightness.
  3. 　前記注視点を、視線追跡装置を使用して特定することを特徴とする請求項１または２に記載の表示装置の表示方法。 The display method of the display device according to claim 1 or 2, wherein the gazing point is specified using a line-of-sight tracking device.
  4. 　前記画面に向かって水平方向よりも垂直方向において、前記画面の最大輝度の低下の開始位置が、前記注視点に近いことを特徴とする請求項１から３の何れか１項に記載の表示装置の表示方法。 4. The display device according to claim 1, wherein a start position of a decrease in the maximum brightness of the screen is closer to the gazing point in a vertical direction than in a horizontal direction toward the screen. 5. How to display.
  5. 　前記画面に向かって水平方向よりも垂直方向において、前記画面の最大輝度の低下の割合を大きくすることを特徴とする請求項１から４の何れか１項に記載の表示装置の表示方法。 5. The display method of a display device according to claim 1, wherein a reduction rate of the maximum luminance of the screen is increased in a vertical direction rather than a horizontal direction toward the screen.
  6. 　前記最大輝度の低下が、前記画面に向かって水平方向において、前記注視点に対して対称であることを特徴とする請求項１から５の何れか１項に記載の表示装置の表示方法。 6. The display method of a display device according to claim 1, wherein the decrease in the maximum luminance is symmetrical with respect to the gazing point in a horizontal direction toward the screen.
  7. 　前記最大輝度の低下が、前記画面に向かって垂直方向において、前記注視点に対して対称であることを特徴とする請求項１から６の何れか１項に記載の表示装置の表示方法。 The display device display method according to any one of claims 1 to 6, wherein the decrease in the maximum luminance is symmetric with respect to the gazing point in a vertical direction toward the screen.
  8. 　前記画面に向かって水平方向において、前記注視点から視野角４０度以上５０度以下の位置から、前記画面の最大輝度を低下させることを特徴とする請求項１から７の何れか１項に記載の表示装置の表示方法。 8. The maximum brightness of the screen is lowered from a position at a viewing angle of 40 degrees or more and 50 degrees or less from the gazing point in the horizontal direction toward the screen. Display method of the display device.
  9. 　前記画面に向かって垂直方向において、前記注視点から視野角３０度以上５０度以下の位置から、前記画面の最大輝度を低下させることを特徴とする請求項１から８の何れか１項に記載の表示装置の表示方法。 9. The maximum luminance 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 a vertical direction toward the screen. Display method of the display device.
  10. 　前記画面に向かって水平方向において、前記注視点から視野角５０度以上の位置から前記画面の端部までの最大輝度を、前記画面の中央の最大輝度の６０％とすることを特徴とする請求項１から９の何れか１項に記載の表示装置の表示方法。 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 toward the screen is set to 60% of the maximum luminance at the center of the screen. Item 10. The display method for a display device according to any one of Items 1 to 9.
  11. 　前記画面に向かって垂直方向において、前記注視点から視野角５０度以上の位置から前記画面の端部までの最大輝度を、前記画面の中央の最大輝度の５０％とすることを特徴とする請求項１から１０の何れか１項に記載の表示装置の表示方法。 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 toward the screen is 50% of the maximum luminance at the center of the screen. Item 11. A display method for a display device according to any one of Items 1 to 10.
  12. 　表示装置がバックライト光源を備え、該バックライト光源の発光強度を動的に制御することにより、前記画面の最大輝度の低下を実現することを特徴とする請求項１から１１の何れか１項に記載の表示装置の表示方法。 12. The display device according to claim 1, wherein 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 display method of the display apparatus as described in 2.
  13. 　前記バックライト光源に流れる電流を動的に制御することにより、前記画面の最大輝度を低下させることを特徴とする請求項１２に記載の表示装置の表示方法。 The display device display method according to claim 12, wherein the maximum brightness of the screen is reduced by dynamically controlling a current flowing through the backlight light source.
  14. 　前記バックライト光源の発光時間を動的に制御することにより、前記画面の最大輝度を低下させることを特徴とする請求項１２または１３に記載の表示装置の表示方法。 14. The display device display method according to claim 12, wherein the maximum luminance of the screen is lowered by dynamically controlling the light emission time of the backlight light source.
  15. 　前記バックライト光源の強度を制御することにより、前記画面の表示輝度を制御することを特徴とする請求項１２から１４の何れか１項に記載の表示装置の表示方法。 The display device display method according to any one of claims 12 to 14, wherein the display luminance of the screen is controlled by controlling the intensity of the backlight light source.
  16. 　表示装置が複数の発光素子を含む表示パネルを備え、該表示パネルの前記発光素子のそれぞれの輝度を動的に制御することにより、前記画面の最大輝度を低下させることを特徴とする請求項１から１１の何れか１項に記載の表示装置の表示方法。 The display device includes a display panel including a plurality of light emitting elements, and the maximum luminance of the screen is reduced by dynamically controlling the luminance of each of the light emitting elements of the display panel. The display method of the display apparatus of any one of 11-11.
  17. 　使用者が装着し、該使用者の視界全体に画面を表示する表示装置であって、
    　前記画面のうち、前記使用者が注視する注視点から周囲に向かう方向において、前記画面の最大輝度が単調に低下し、前記注視点の移動に応じて、前記画面の最大輝度が低下する位置が動的に変化することを特徴とする表示装置。     A display device worn by a user and displaying a screen in the entire field of view of the user,
    Among the screens, in a direction from the gazing point that the user gazes toward the periphery, the maximum luminance of the screen decreases monotonously, and the position where the maximum luminance of the screen decreases according to the movement of the gazing point is A display device that changes dynamically.
  18. 　視線追跡装置を備え、前記注視点を、前記視線追跡装置を使用して特定することを特徴とする請求項１７に記載の表示装置。 18. The display device according to claim 17, further comprising a line-of-sight tracking device, wherein the gaze point is specified using the line-of-sight tracking device.
  19. 　請求項１７または１８の表示装置を備えたヘッドマウントディスプレイデバイス。 A head-mounted display device comprising the display device according to claim 17 or 18.
PCT/JP2018/009531 2017-03-17 2018-03-12 Display method for display device, display device, and head-mount display device WO2018168781A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017053120 2017-03-17
JP2017-053120 2017-03-17

Publications (1)

Publication Number Publication Date
WO2018168781A1 true WO2018168781A1 (en) 2018-09-20

Family

ID=63523116

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2018/009531 WO2018168781A1 (en) 2017-03-17 2018-03-12 Display method for display device, display device, and head-mount display device

Country Status (1)

Country Link
WO (1) WO2018168781A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022076239A1 (en) * 2020-10-05 2022-04-14 Facebook Technologies, Llc Methods of driving light sources in a near-eye display
WO2022178043A1 (en) * 2021-02-18 2022-08-25 Meta Platforms Technologies, Llc Dynamically driving multiple portions of display device with different duty cycles
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 (en) * 1992-05-26 1993-12-10 Olympus Optical Co Ltd Head mount type display device
JP2007067313A (en) * 2005-09-02 2007-03-15 Sharp Corp Led backlight device, and image display apparatus therewith
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 (en) * 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 Display, display method, and display program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05328258A (en) * 1992-05-26 1993-12-10 Olympus Optical Co Ltd Head mount type display device
JP2007067313A (en) * 2005-09-02 2007-03-15 Sharp Corp Led backlight device, and image display apparatus therewith
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 (en) * 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 Display, display method, and display program

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022076239A1 (en) * 2020-10-05 2022-04-14 Facebook Technologies, Llc Methods of driving light sources in a near-eye display
US11686945B2 (en) 2020-10-05 2023-06-27 Meta Platforms Technologies, Llc Methods of driving light sources in a near-eye display
WO2022178043A1 (en) * 2021-02-18 2022-08-25 Meta Platforms Technologies, Llc Dynamically driving multiple portions of display device with different duty cycles
US11727892B1 (en) 2022-11-09 2023-08-15 Meta Platforms Technologies, Llc Eye-tracking based foveation control of displays

Similar Documents

Publication Publication Date Title
US20220365361A1 (en) Directional backlight
US8994614B2 (en) Head mountable display
Wolffsohn et al. TFOS Lifestyle: Impact of the digital environment on the ocular surface
WO2018168781A1 (en) Display method for display device, display device, and head-mount display device
CN108873469B (en) Display device and direct type backlight plate thereof
WO2019165620A1 (en) Near eye display method capable of multi-depth of field imaging
JP4121399B2 (en) LIGHTING DEVICE AND LIQUID CRYSTAL DISPLAY DEVICE USING THE SAME
JP2016184058A (en) Display, display method, and display program
KR102329295B1 (en) Head mounted display device
US10955724B2 (en) Adjustable lens systems
TW201725422A (en) Liquid crystal display with variable drive voltage
JP2011145607A (en) Head mount display
US20150277019A1 (en) Backlight unit and liquid crystal display device having the same
JP6749824B2 (en) Display device and lighting device
WO2018168780A1 (en) Display method for display device, display device, and head-mount display device
US20170235146A1 (en) An Apparatus and Method for Providing an Image
TWI536342B (en) Control method of display
US10861417B2 (en) Head mounted display with wide field of view and inset display
US20110298790A1 (en) Image signal processing device and image signal processing method, and computer program
US10852545B2 (en) Head mounted viewer for AR and VR scenes
JP2020106833A (en) Head mount display device
CN111868816B (en) Display optimization method and display device
US10540930B1 (en) Apparatus, systems, and methods for temperature-sensitive illumination of liquid crystal displays
WO2017208528A1 (en) Backlight system, display device, and light emission control method
CN111381372A (en) Transmission type display equipment and augmented reality display

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 18767657

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 18767657

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP