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WO2018168780A1 - Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif d'affichage tête haute - Google Patents

Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif d'affichage tête haute Download PDF

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Publication number
WO2018168780A1
WO2018168780A1 PCT/JP2018/009530 JP2018009530W WO2018168780A1 WO 2018168780 A1 WO2018168780 A1 WO 2018168780A1 JP 2018009530 W JP2018009530 W JP 2018009530W WO 2018168780 A1 WO2018168780 A1 WO 2018168780A1
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Prior art keywords
screen
display device
display
maximum luminance
center
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Application number
PCT/JP2018/009530
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English (en)
Japanese (ja)
Inventor
奈留 臼倉
裕一 神林
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シャープ株式会社
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Publication of WO2018168780A1 publication Critical patent/WO2018168780A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S2/00—Systems of lighting devices, not provided for in main groups F21S4/00 - F21S10/00 or F21S19/00, e.g. of modular construction
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/02—Viewing or reading apparatus
    • 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

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 for a display device is 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.
  • the maximum brightness of the screen is monotonously decreased, and the start position of the decrease in the maximum brightness of the screen in the vertical direction toward the screen with respect to the horizontal direction toward the screen,
  • the maximum brightness of the screen at the outermost periphery of the user's field of view is low or equal to or close to the center of the screen.
  • 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, from the center of the screen toward the periphery.
  • the maximum brightness of the screen decreases monotonously, and the start position of the decrease in the maximum brightness of the screen in the vertical direction toward the screen is the center of the screen in the horizontal direction toward the screen Or the maximum brightness of the screen at the outermost periphery of the visual field of the user is low.
  • 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 and a backlight light source 20 disposed on the lower surface of the display panel 10.
  • a display panel 10 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 light guide plate 22, and a reflection plate 23.
  • the light emitting element 21 projects light into the light guide plate 22 from the side of the light guide plate 22.
  • 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 light guide plate 22 disperses the light from the light emitting element 21 on the display surface of the display panel 10.
  • a dimming prism pattern 24 may be formed on the surface of the light guide plate 22. By designing the prism pattern 24, the intensity of light emission from the surface of the light guide plate 22 can be designed according to the position of the light guide plate 22.
  • the reflection plate 23 reflects the light radiated to the side opposite to the display panel 10 side among the light transmitted through the light guide plate 22, and improves the display efficiency of the display device 1.
  • 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.
  • FIG. 3 is a diagram for explaining a display device of a comparative form and a display method of the display device of the comparative form.
  • FIG. 3 shows a case where the display device always displays a white screen. That is, it is assumed that the display device of FIG. 3 displays the maximum brightness 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 graphs shown on the upper and right sides of the display device 1 are the luminances on the lines connecting A1 to A2 and B1 to B2 passing through the center of the display device 1 in the same manner as the graphs shown on the upper and right sides of the display device of the comparative example of FIG. The position dependence of is shown.
  • 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 is limited. Therefore, it is not necessary to keep the luminance constant over the entire screen of the display device 1. For example, at the edge of the screen that is difficult for the user to recognize, 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 brightness is lower in the periphery than near the center of 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 screen will be described.
  • the maximum luminance of the display device 1 is from the position L away from the center by dL toward the left of the screen of the display device 1 in the peripheral direction, that is, in the direction of A1. On the other hand, it has begun to decline monotonously. Similarly, the maximum luminance of the display device 1 starts to decrease monotonously from the position R away from the center toward the screen of the display device 1 by dR to the surrounding direction, that is, in the direction of A2. .
  • the maximum luminance of the display device 1 is from the position U away from the center toward the screen of the display device 1 by dU and in the peripheral direction, that is, the direction of B1. It has begun to decline monotonously. Similarly, the maximum luminance of the display device 1 starts to decrease monotonously from the position D away from the center by dD downward 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.
  • FIG. 1 the maximum luminance corresponding to the horizontal and vertical positions between A1 and A2 and between B1 and B2, that is, through the center of the screen of the display device 1 is shown.
  • the maximum luminance decreases from the position E of the substantially ellipse connecting L, U, R, and D to the periphery.
  • dL and dR are both longer than both dU and dD. That is, the maximum luminance of the display device 1 is closer to the center of the screen in the vertical direction than in the horizontal direction toward the screen of the display device 1. Further, in the vertical direction rather than the horizontal direction toward the screen of the display device 1, the maximum luminance of the screen from the outermost periphery of the user's visual field (for example, the viewing angle of 50 degrees from the center of the screen) to the edge of the screen is higher. Low.
  • 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 addition, human vision has the property of being better perceived in the horizontal direction than in the vertical direction. Therefore, 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 center of the user's visual field according to this characteristic, the display device 1 in which the luminance reduction is not easily recognized. Can be realized. Furthermore, by making the start position of the decrease in maximum brightness equal to or close to the center of the screen in the vertical direction relative to the horizontal direction, the display device 1 that makes it difficult to perceive the decrease in brightness can be realized. .
  • the maximum luminance of the display device 1 may be gradually decreased at a screen position with a viewing angle of 40 degrees to 50 degrees from the center of the screen. Further, at the position of the outermost periphery (for example, the viewing angle of 50 degrees from the center of the screen) in the horizontal direction of the screen of the display device 1, the maximum luminance of the display device 1 may be 60% or less and 30% or more of the central maximum luminance. . Further, in the vertical direction of the screen of the display device 1, the maximum brightness of the display device 1 may start to be gradually lowered at a screen position with a viewing angle of 30 degrees to 50 degrees from the center of the screen.
  • the maximum luminance of the display device 1 may be set to 50% or less and 25% or more of the central maximum luminance at a position of the outermost periphery (for example, a viewing angle of 50 degrees from the center of the screen) in the vertical direction of the screen of the display device 1. .
  • the light emission intensity of the backlight light source 20 As a specific configuration for realizing the above, there is a configuration for reducing the light emission intensity of the backlight light source 20.
  • a method for reducing 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 controlling the current flowing through each light emitting element 21. For example, by setting the current value flowing through the light emitting elements 21a and 21d on the screen edge side to 60% of the current value flowing through the light emitting elements 21b and 21c on the screen center side, the maximum luminance at the screen edge of the display device 1 is reduced. You may let them.
  • the light emission time of each light emitting element 21 may be changed by controlling the pulse width of the current flowing through each light emitting element 21. For example, by setting the pulse width of the current flowing through the light emitting elements 21a and 21d on the screen end side to 60% of the pulse width of the current flowing through the light emitting elements 21b and 21c issued at the maximum brightness on the screen center side, the display device 1 The maximum luminance at the screen edge may be reduced.
  • a configuration in which the maximum luminance varies depending on the position of the screen may be realized by designing the arrangement position between the light emitting elements 21. For example, instead of arranging the light emitting elements 21 evenly as shown in FIG. 4A, as shown in FIG. 4B, the light emitting elements 21 are arranged toward the edge of the screen. You may arrange
  • the light guide plate 22 may be designed and the maximum brightness may be reduced by lowering the maximum brightness on the end side relative to the maximum brightness at the center of the display device 1.
  • the reduction in the maximum luminance due to the light guide plate 22 may be obtained by changing the pattern interval of the dimming prism pattern 24 on the surface of the light guide plate 22 or the inclination angle of the pattern.
  • the maximum luminance in the vertical direction of the display device 1 can be reduced by the design of the light emitting element 21.
  • the design of the light guide plate 22 can reduce the maximum luminance in the horizontal direction of the display device 1.
  • 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 fall generate
  • 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.
  • FIG. 5 is a diagram illustrating the display device 2 according to the second embodiment.
  • FIG. 5A is a top view of the display device 2
  • FIG. 5B is a cross-sectional view taken along the line C1C2 of the display device 2 in FIG.
  • the polarizing plate 13 on the upper surface of the display panel 10 is not shown, and is shown through the light emitting element.
  • the display device 2 includes a display panel 10 and a backlight light source 30 disposed on the lower surface of the display panel 10.
  • the display panel 10 may have the same configuration as the display panel 10 of the display device 1 of the first embodiment.
  • the backlight light source 30 is different from the backlight light source 20 of the display device 1 in that a diffusion plate 32 is provided and the light emitting element 21 is two-dimensionally arranged on the reflection plate 23. Light from the light emitting element 21 is diffused to the pixel region of the display panel 10 by the diffusion plate 32. 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.
  • FIG. 6 is a diagram for explaining a display method of the display device 2 according to the present embodiment.
  • FIG. 6 shows a case where the display device 2 always displays a white screen.
  • the graphs shown on the upper and right sides of the display device 2 are the same as the graphs 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 center of the display device 2. Indicates position dependence.
  • the maximum luminance of the display device 2 starts to decrease from the position of the screen of the display device 2 to the periphery in the direction from the center of the display device 2 to 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, as in the previous embodiment. That is, the maximum luminance of the display device 2 is reduced in the vertical direction rather than in the horizontal direction toward the screen of the display device 2.
  • a configuration in which the light emission intensity of the backlight light source 30 is reduced. Can be mentioned.
  • a method for reducing the light emission intensity of the backlight light source 30 there is a configuration in which the light emission intensity of each light emitting element 21 is changed by controlling the current flowing through each light emitting element 21.
  • the current value flowing through the light emitting element 21f may be lower than the current value flowing through the light emitting element 21g near the center of the screen.
  • the light emission intensity of the backlight source 30 is reduced by controlling the pulse width of the current of each light emitting element 21 or by designing the arrangement position of each light emitting element 21.
  • the maximum luminance may be reduced.
  • 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 lowering 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 source 30 without reducing the light transmittance of the display panel 10 as much as possible. Therefore, the display device 2 of the present embodiment can perform display using so-called area active drive that controls the display luminance by controlling the light emission intensity of the backlight light source 20.
  • the display brightness shown in the circle of FIG. 7 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 2 that uses area active drive in the display of the positions shown in the circles of FIG. 7 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 of “display brightness” in Table 1 shows the actual display brightness 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 2 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 low luminance, as compared with the display device of the comparative example. Is possible. Therefore, the display device 2 of the present embodiment can perform display with lower power consumption by performing display using area active drive.
  • FIG. 8 is a diagram illustrating the display device 3 according to the third embodiment.
  • 8A is a top view of the display device 3
  • FIG. 8B is a cross-sectional view taken along the line C1C2 of the display device 3 in FIG. 8A.
  • the display device 3 includes a display panel 40 instead of the display panel 10 and the backlight light sources 20 and 30 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. 8, the light emitting elements 42 are illustrated at the four corners and the center of the display panel 40, but other light emitting elements 42 may be disposed.
  • 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 3 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 3 for each pixel by limiting the upper limit of the current flowing through the light emitting element 42.
  • FIG. 9 is a diagram for explaining a display method of the display device 3 according to the present embodiment.
  • FIG. 9 shows a case where the display device 3 always displays a white screen.
  • the graphs shown on the upper and right sides of the display device 3 are the same as the graphs shown on the upper and right sides of the display device 1 in FIG. 1, with the maximum luminance on the line connecting A1 to A2 and B1 to B2 passing through the center of the display device 3. Indicates position dependence.
  • the maximum luminance of the display device 3 starts to decrease from the position of the screen of the display device 3 to the periphery in the direction from the center of the display device 3 to 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. That is, the maximum luminance of the display device 3 is closer to the center of the screen in the vertical direction than in the horizontal direction toward the screen of the display device 3.
  • a specific configuration for realizing the above is a configuration for reducing the light emission intensity of the light emitting element 42.
  • a method for reducing 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.
  • the maximum luminance at the screen edge of the display device 1 may be reduced by making the current value flowing through the light emitting element 42a at the end of the screen lower than the current value flowing through the light emitting element 42b near the center of the screen.
  • 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.
  • a display method of the 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, in a direction from the center of the screen toward the periphery.
  • the maximum brightness is monotonously decreased, and the start position of the decrease in the maximum brightness of the screen is equal to or close to the center of the screen in the vertical direction toward the screen relative to the horizontal direction toward the screen.
  • the maximum brightness of the screen at the outermost periphery of the visual field of the user is low.
  • 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 display luminance at the position on the screen is reduced according to the rate of decrease in the maximum luminance.
  • the decrease in the maximum luminance is symmetrical with respect to the center of the screen in the horizontal direction toward the screen.
  • the decrease in the maximum luminance is symmetric with respect to the center of the screen in the vertical direction toward the screen.
  • the maximum brightness of the screen is lowered from a position at a viewing angle of 40 degrees to 50 degrees from the center of the screen in the horizontal direction toward the screen.
  • the maximum luminance of the screen is reduced from a position with a viewing angle of 30 degrees to 50 degrees from the center of the screen.
  • the maximum luminance from the position of the viewing angle of 50 degrees or more from the center of the screen to the edge of the screen is 60% or less of the maximum luminance at the center of the screen 30 % Or more.
  • the maximum luminance from the center of the screen to the edge of the screen from a position having a viewing angle of 50 degrees or more is 50% or less of the maximum luminance at the center of the screen 25 % Or more.
  • the display device includes a backlight light source, and a reduction in the maximum luminance of the screen is realized by controlling the light emission intensity of the backlight light source.
  • the maximum luminance of the screen is reduced by controlling the current flowing through the backlight light source.
  • the maximum luminance of the screen is reduced by controlling the light emission time of the backlight light source.
  • the maximum brightness of the screen is reduced by designing the arrangement position of the backlight light source.
  • the display luminance of the screen is controlled by controlling the intensity of the backlight light source.
  • the maximum luminance of the screen is lowered by the design of the light guide plate that guides the light from the backlight light source to the display surface.
  • the light guide plate includes a prism pattern, and the maximum luminance of the screen is reduced by the design of the prism pattern.
  • the display device includes a display panel including a plurality of light emitting elements, and the maximum luminance of the screen is reduced by controlling the luminance of each of the light emitting elements of the display panel.
  • the display device is a display device that is worn by a user and displays the screen in the entire field of view of the user, and the maximum luminance of the screen decreases monotonously in a direction from the center of the screen toward the periphery.
  • the start position of the decrease in the maximum brightness of the screen is equal to or close to the center of the screen in the vertical direction toward the screen relative to the horizontal direction toward the screen, or the user
  • the maximum brightness of the screen at the outermost periphery of the field of view is low.
  • a head-mounted display device includes the display device.

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Abstract

La présente invention a pour objectif de réaliser un procédé d'affichage qui rend difficile pour un utilisateur d'identifier une réduction de luminance d'un écran d'affichage. L'invention concerne un procédé d'affichage pour un dispositif d'affichage (1), le procédé comprenant la réduction monotone de la luminance maximale au niveau d'une position dans une direction partant du centre (o) de l'écran vers l'environnement ; dans la direction verticale vers l'écran par rapport à la direction horizontale vers l'écran, la position de départ de la réduction de la luminance maximale de l'écran étant une position égale ou proche du centre de l'écran ou la luminance maximale de l'écran dans la périphérie la plus à l'extérieur du champ de vision de l'utilisateur étant faible.
PCT/JP2018/009530 2017-03-17 2018-03-12 Procédé d'affichage pour dispositif d'affichage, dispositif d'affichage et dispositif d'affichage tête haute WO2018168780A1 (fr)

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JP2017053119 2017-03-17
JP2017-053119 2017-03-17

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WO2018168780A1 true WO2018168780A1 (fr) 2018-09-20

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JPH05328258A (ja) * 1992-05-26 1993-12-10 Olympus Optical Co Ltd 頭部装着型ディスプレイ
JP2007219234A (ja) * 2006-02-17 2007-08-30 Matsushita Electric Ind Co Ltd 液晶表示装置のバックライト装置
JP2008304502A (ja) * 2007-06-05 2008-12-18 Sanyo Electric Co Ltd 液晶パネル用バックライトユニット及び該バックライトユニットを用いた画像表示装置
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113330506A (zh) * 2018-11-19 2021-08-31 脸谱科技有限责任公司 用于在亮度受控环境中进行局部调光的装置、系统和方法
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