WO2019160160A1

WO2019160160A1 - Head-up display, head-up display system, and moving body

Info

Publication number: WO2019160160A1
Application number: PCT/JP2019/006084
Authority: WO
Inventors: 薫草深
Original assignee: 京セラ株式会社
Priority date: 2018-02-19
Filing date: 2019-02-19
Publication date: 2019-08-22
Also published as: JP2019145967A; JP7129789B2

Abstract

This head-up display is provided with a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of sub pixels. The plurality of sub pixels are arranged, in a grid pattern, in a first direction and a second direction approximately perpendicular to the first direction. The display surface has a plurality of band-shaped regions. The plurality of band-shaped regions extend in a defined direction on the display surface. The optical element defines the beam direction of image light for each of the plurality of band-shaped regions. The image light is emitted from the sub pixels. The projection optical system reflects the image light to form a virtual image of the image displayed on the display surface. The controller controls the display surface. The band-shaped regions include a first visible region and a second visible region. In the first visible region, the beam direction is defined by the optical element such that image light that reaches a first eye of a user is emitted. In the second visible region, the beam direction is defined by the optical element such that image light that reaches a second eye of a user, different from the first eye, is emitted. The controller displays a black image on first sub pixels, at least a portion of which are included in the first visible region. The controller performs a control so that an image displayed on a portion of second sub pixels, at least a portion of which are included in the second visible region, can be switched between the black image and an observation image having an arbitrary luminance.

Description

Head-up display, head-up display system, and moving body

Cross-reference of related applications

This application claims the priority of Japanese Patent Application No. 2018-027379 filed on Feb. 19, 2018, the entire disclosure of which is incorporated herein by reference.

The present invention relates to a head-up display, a head-up display system, and a moving object.

Conventionally, when a driver driving a vehicle tries to visually recognize a display image displayed by a head-up display at the same time as a distant external image, the external image and the display image have different positions in the depth direction. It may be difficult to do. In order to make it easier for a user to visually recognize an external image and a display image, it is known to project image light emitted from a head-up display only on one eye of the user. This technique is described in, for example, Japanese Patent Application Laid-Open No. 2010-076533. Thereby, since the depth position of the display image becomes ambiguous, the difficulty in visual recognition due to the difference in the position in the depth direction between the external image and the display image is reduced.

The head-up display of the present disclosure includes a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of subpixels. The plurality of sub-pixels are arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The display surface has a plurality of band-like regions. The plurality of band-like regions extend in a prescribed direction on the display surface. The optical element defines a light beam direction of image light for each of a plurality of band-like regions. Image light is emitted from the sub-pixels. The projection optical system reflects the image light so that a virtual image of an image displayed on the display surface is formed. The controller controls the display surface. The belt-like region includes a first visible region and a second visible region. The first visible region emits image light that reaches the first eye of the user when the light ray direction is defined by the optical element. The second visible region emits image light that reaches a second eye different from the first eye of the user when a light ray direction is defined by the optical element. The controller displays a black image on a first sub-pixel at least partially included in the first visible region. The controller controls an image to be displayed on a part of the second subpixel at least a part of which is included in the second visible region so as to be switchable between an observation image having arbitrary luminance and the black image. .

The head-up display of the present disclosure includes a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of subpixels. The plurality of sub-pixels are arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The display surface has a plurality of band-like regions. The plurality of band-like regions extend in a prescribed direction on the display surface. The optical element defines a light beam direction of image light for each of a plurality of band-like regions. Image light is emitted from the sub-pixels. The projection optical system reflects the image light so that a virtual image of an image displayed on the display surface is formed. The controller controls the display surface. The belt-like region includes a first visible region and a second visible region. The first visible region emits image light that reaches the first eye of the user when the light ray direction is defined by the optical element. The second visible region emits image light that reaches a second eye different from the first eye of the user when a light ray direction is defined by the optical element. The controller displays a black image on a first sub-pixel at least partially included in the first visible region. The controller is configured to display an image to be displayed on a sub-pixel in contact with the first sub-pixel among second sub-pixels at least part of which is included in the second visible region, an observation image having arbitrary luminance, and the black image Control to switch between.

The head-up display of the present disclosure includes a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of subpixels. The plurality of sub-pixels are arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The display surface has a plurality of band-like regions. The plurality of band-like regions extend in a prescribed direction on the display surface. The optical element defines a light beam direction of image light for each of a plurality of band-like regions. Image light is emitted from the sub-pixels. The projection optical system reflects the image light so that a virtual image of an image displayed on the display surface is formed. The controller controls the display surface. The belt-like region includes a first visible region and a second visible region. The first visible region emits image light that reaches the first eye of the user when the light ray direction is defined by the optical element. The second visible region emits image light that reaches a second eye different from the first eye of the user when a light ray direction is defined by the optical element. The controller includes a first display state and a second display unit in a repeating unit of a first sub-pixel at least partly included in the first visible region and a second sub-pixel at least partly included in the second visible region. Control to switch between display states. The first display state is a state in which the number of subpixels that display the black image is greater than the number of subpixels that display the observation image. The second display state is a state in which the number of sub-pixels displaying the black image is the same as the number of sub-pixels displaying the observation image.

The head-up display system of the present disclosure includes an illuminance measuring instrument and a head-up display. The illuminance measuring instrument measures illuminance. The head-up display includes a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of subpixels. The plurality of sub-pixels are arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The display surface has a plurality of band-like regions. The plurality of band-like regions extend in a prescribed direction on the display surface. The optical element defines a light beam direction of image light for each of a plurality of band-like regions. Image light is emitted from the sub-pixels. The projection optical system reflects the image light so that a virtual image of an image displayed on the display surface is formed. The controller controls the display surface. The belt-like region includes a first visible region and a second visible region. The first visible region emits image light that reaches the first eye of the user when the light ray direction is defined by the optical element. The second visible region emits image light that reaches a second eye different from the first eye of the user when a light ray direction is defined by the optical element. The controller displays a black image on a first sub-pixel at least partially included in the first visible region. The controller controls an image to be displayed on a part of the second subpixel at least a part of which is included in the second visible region so as to be switchable between an observation image having arbitrary luminance and the black image. .

The moving body of the present disclosure includes a head-up display. The head-up display includes a display surface, an optical element, a projection optical system, and a controller. The display surface has a plurality of subpixels. The plurality of sub-pixels are arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction. The display surface has a plurality of band-like regions. The plurality of band-like regions extend in a prescribed direction on the display surface. The optical element defines a light beam direction of image light for each of a plurality of band-like regions. Image light is emitted from the sub-pixels. The projection optical system reflects the image light so that a virtual image of an image displayed on the display surface is formed. The controller controls the display surface. The belt-like region includes a first visible region and a second visible region. The first visible region emits image light that reaches the first eye of the user when the light ray direction is defined by the optical element. The second visible region emits image light that reaches a second eye different from the first eye of the user when a light ray direction is defined by the optical element. The controller displays a black image on a first sub-pixel at least partially included in the first visible region. The controller controls an image to be displayed on a part of the second subpixel at least a part of which is included in the second visible region so as to be switchable between an observation image having arbitrary luminance and the black image. .

FIG. 1 is a diagram illustrating a schematic configuration of a head-up display system according to an embodiment of the present disclosure. FIG. 2 is a diagram showing a schematic configuration of the head-up display shown in FIG. FIG. 3 is a diagram showing an example of the display panel shown in FIG. 2 viewed from the depth direction. FIG. 4 is a diagram showing an example of the parallax barrier shown in FIG. 2 viewed from the depth direction. FIG. 5 is a diagram showing an example of the display panel and the parallax barrier shown in FIG. 2 viewed from the parallax barrier side with the left eye. FIG. 6 is a diagram showing an example of the display panel and the parallax barrier shown in FIG. 2 viewed from the parallax barrier side with the right eye. FIG. 7 is a diagram for explaining the relationship between the virtual image shown in FIG. 1 and the user's eyes. FIG. 8 is a diagram for explaining the first virtual image visually recognized by the user's left eye. FIG. 9 is a diagram for explaining the first virtual image visually recognized by the right eye of the user. FIG. 10 is a diagram for explaining an example of a virtual image visually recognized by each of the user's left eye and right eye. FIG. 11 is a diagram for explaining an example when the number of subpixels for displaying a black image is increased and the position of the parallax barrier is changed in the example illustrated in FIG. 5. FIG. 12 is a diagram for explaining another example of the virtual image visually recognized by the left eye and the right eye of the user. FIG. 13 is a diagram illustrating a schematic configuration of a head-up display system according to an embodiment of the present disclosure.

In the conventional technique, when image light is intended to reach only one eye of the user, the image light may leak and reach the other eye. As a result, crosstalk may occur, and it may be difficult for the user to properly view the image.

According to an embodiment of the present disclosure, it is possible to allow a user to view an appropriate image and reduce crosstalk.

Hereinafter, a first embodiment of the present disclosure will be described with reference to the drawings.

The first embodiment of the present disclosure will be described in detail with reference to the drawings. The drawings used in the following description are schematic. Therefore, the dimensional ratios and the like on the drawings do not necessarily match the actual ones.

The head-up display system 1 according to the first embodiment includes an illuminance measuring instrument 2 and a head-up display 3 as shown in FIG. The head-up display 3 is also referred to as HUD (Head Up Display) 3. The head-up display system 1 may be mounted on the moving body 100 as shown in FIG.

“Moving object” in the present disclosure includes vehicles, ships, and aircraft. “Vehicle” in the present disclosure includes, but is not limited to, automobiles and industrial vehicles, and may include railway vehicles, domestic vehicles, and fixed-wing aircraft that run on the runway. The automobile includes, but is not limited to, a passenger car, a truck, a bus, a two-wheeled vehicle, a trolley bus, and the like, and may include other vehicles that travel on the road. Industrial vehicles include industrial vehicles for agriculture and construction. Industrial vehicles include but are not limited to forklifts and golf carts. Industrial vehicles for agriculture include, but are not limited to, tractors, tillers, transplanters, binders, combines, and lawn mowers. Industrial vehicles for construction include, but are not limited to, bulldozers, scrapers, excavators, crane trucks, dump trucks, and road rollers. Vehicles include those that travel by human power. The vehicle classification is not limited to the above. For example, an automobile may include an industrial vehicle capable of traveling on a road, and the same vehicle may be included in a plurality of classifications. Ships in the present disclosure include marine jets, boats, and tankers. The aircraft in the present disclosure includes fixed wing aircraft and rotary wing aircraft.

The illuminance measuring instrument 2 is disposed in the vicinity of the projection optical system 110 that forms the head-up display 3 and will be described in detail later. The illuminance measuring instrument 2 is not limited to the vicinity of the projection optical system 110, and can be arranged at another position of the moving body 100. The illuminance measuring instrument 2 is configured to detect the illuminance of the surrounding environment of the projection optical system 110. The illuminance measuring instrument 2 can also be used as another device or component provided in the moving body 100.

As shown in FIG. 2, the HUD 3 includes a display device 4 and a projection optical system 110. A part of the configuration of the HUD 3 may be shared with other devices or parts included in the moving body 100. Other devices or parts included in the moving body 100 that are also used as a part of the configuration of the HUD 3 may be referred to as a HUD module.

The projection optical system 110 can include a first optical member 111 and a second optical member 112. The first optical member 111 is configured to reflect the image light emitted from the display device 4 to reach a predetermined region of the second optical member 112. The first optical member 111 may include one or more mirrors and lenses. When the first optical member 111 includes a mirror, for example, the mirror included in the first optical member 111 may be a concave mirror. In FIG. 2, the first optical member 111 is displayed as one mirror. However, the present invention is not limited to this, and the first optical member 111 may be configured by combining one or more mirrors, lenses, and other optical elements.

The second optical member 112 reflects the image light emitted from the display device 4 and reflected by the first optical member 111 to reach the user's left eye (first eye) and right eye (second eye). Configured as follows. For example, the windshield of the moving body 100 may also be used as the second optical member 112 of the HUD 3. Therefore, the HUD 3 advances the light emitted from the display device 4 along the optical path A to the left eye and the right eye of the user. The user can visually recognize the light that has reached along the optical path A as the virtual image 120.

As shown in FIG. 2, the display device 4 includes an irradiator 5, a display panel 6, a parallax barrier 7 as an optical element, and a controller 8. The display device 4 can be accommodated in a dashboard of the mobile object 100, for example.

The irradiator 5 can be arranged on one surface side of the display panel 6. The irradiator 5 is configured to irradiate the display panel 6 in a plane. The irradiator 5 can include a light source, a light guide plate, a diffusion plate, a diffusion sheet, and the like. The irradiator 5 can emit irradiation light from a light source, and can make the irradiation light uniform in the surface direction of the display panel 6 by a light guide plate, a diffusion plate, a diffusion sheet, or the like. The irradiator 5 can be configured to emit the uniformed light toward the display panel 6.

The display panel 6 may be a display panel such as a transmissive liquid crystal display panel. The display panel 6 has a plate-shaped display surface 61. As shown in FIG. 3, the display surface 61 has a plurality of subpixels. The plurality of subpixels are arranged in a lattice shape along a first direction and a second direction substantially orthogonal to the first direction. A direction orthogonal to the first direction and the second direction is referred to as a third direction. The first direction may be referred to as the horizontal direction. The second direction may be referred to as the vertical direction. The third direction may be referred to as the depth direction. However, the first direction, the second direction, and the third direction are not limited to these. In the drawing, the first direction is represented as the x-axis direction, the second direction is represented as the y-axis direction, and the third direction is represented as the z-axis direction.

Each subpixel can correspond to any of R (Red), G (Green), and B (Blue). The three subpixels R, G, and B can constitute one pixel as a set. One pixel can be called one pixel. The color of each subpixel is not limited to R, G, and B, and may include other colors such as white, for example. The number of subpixels constituting one pixel is not limited to three, and may be any number of one or more. The horizontal direction is, for example, a direction in which a plurality of subpixels constituting one pixel are arranged. The vertical direction is, for example, a direction in which subpixels of the same color are arranged. The display panel 6 is not limited to a transmissive display panel, and a self-luminous display panel can also be used. In addition to the liquid crystal panel, the transmissive display panel may include a MEMS (Micro Electro Mechanical Systems) shutter type display panel. The self-luminous display panel can include an organic EL (electro-luminescence) display panel and an inorganic EL display panel. When the display panel 6 is a self-luminous display panel, the display device 4 may not include the irradiator 5. The light emitted from the subpixel can be expressed as image light. When the display panel 6 is a transmissive display panel, the image light can be light transmitted through the sub-pixels among the light emitted from the irradiator 5. The image light can have one of R, G, and B colors. When the display panel 6 is a self-luminous display panel, the image light can be light emitted from the subpixel itself.

The display surface 61 includes a plurality of band-like regions. The plurality of strip regions include a first subpixel group Pg1 and a second subpixel group Pg2. Each of the plurality of strip-like regions extends in a specified direction having an inclination with respect to the y-axis on the display surface 61. On the display surface 61, the first sub-pixel group Pg1 and the second sub-pixel group Pg2 are alternately and repeatedly arranged in the horizontal direction. The first sub-pixel group Pg1 includes (n × b) (n × b = m) sub-pixels P1 to Pm arranged in succession, n in the horizontal direction and b in the vertical direction. including. The second subpixel group Pg2 is adjacent to the first subpixel group Pg1 in the horizontal direction. The second subpixel group Pg2 includes n subpixels P (m + 1) to P (2 × m) arranged in succession, n in the horizontal direction and b in the vertical direction. Therefore, assuming that the horizontal length of the subpixels is Hp and the vertical length is Vp, the image pitch k, which is the horizontal arrangement interval between the first subpixel group Pg1 and the second subpixel group Pg2, is It is expressed as k = 2 × n × Hp.

In the example shown in FIG. 3, the first subpixel group Pg1 includes four subpixels P1 to P4 arranged in succession, two in the horizontal direction and two in the vertical direction. The second subpixel group Pg2 includes four subpixels P5 to P8 arranged in succession, two in the horizontal direction and two in the vertical direction. Therefore, n = 2 and the image pitch k is k = 2 × n × Hp = 2 × 2 × Hp = 4 × Hp.

2, the parallax barrier 7 is positioned a predetermined distance away from the display panel 6 on the opposite side of the display panel 6 from the irradiator 5. The parallax barrier 7 has a strip-shaped light reducing surface 71 as shown in FIG. 4 for reducing image light. The parallax barrier 7 has a plurality of dimming surfaces 71. The parallax barrier 7 defines a translucent region 72 between two dimming surfaces 71 adjacent to each other among the plurality of dimming surfaces 71. The light transmissive regions 72 and the light reducing surfaces 71 are alternately arranged in a direction orthogonal to the direction in which the light transmissive regions 72 and the light reducing surfaces 71 extend. The end portion of the translucent area 72 defines the light beam direction of the image light for each of the plurality of band-shaped areas extending in the defined direction. The end of the belt-like region can cross over a plurality of subpixels. In the band-like region, the length of the section for one pixel along the horizontal direction is shorter than the length of the section for one pixel along the vertical direction.

Temporarily, when the line which shows the edge part of the translucent area | region 72 follows a perpendicular direction, a moire becomes easy to be recognized in a display image by the error contained in the arrangement | positioning of a subpixel or the dimension of the translucent area | region 72. When the line indicating the end of the light-transmitting region 72 extends in a direction having a predetermined angle with respect to the vertical direction, moire in the display image due to an error included in the arrangement of the sub-pixels or the size of the light-transmitting region 72 is generated. It becomes difficult to be recognized.

The light transmissive region 72 can be configured to have a higher light transmittance than the light reducing surface 71. The light reducing surface 71 can be configured to have a light transmittance lower than that of the light transmitting region 72. The translucent region 72 can be configured to transmit light incident on the parallax barrier 7. The translucent region 72 may transmit light with a transmittance equal to or higher than the first predetermined value. The first predetermined value may be 100%, for example, or a value close to 100%. If the image light emitted from the display surface 61 is in a range in which the image light can be satisfactorily viewed, the first predetermined value may be a value of 100% or less, such as 80% or 50%. The light-reducing surface 71 is a portion that blocks and does not transmit light incident on the parallax barrier 7. In other words, the dimming surface 71 blocks an image displayed on the display device 10. The dimming surface 71 may block light with a transmittance equal to or less than the second predetermined value. The second predetermined value may be 0%, for example, or a value close to 0%. The first predetermined value may be a value smaller than 50%, for example, 10%, as long as sufficient contrast with light transmitted through the light reducing surface 71 can be secured. A sufficient contrast ratio may be, for example, 100: 1.

The dimming surface 71 may be composed of a film or a plate-like member having a transmittance less than the second predetermined value. The translucent area 72 is composed of an opening provided in the film or plate member. A film may be comprised with resin and may be comprised with another material. The plate-like member may be made of resin or metal, or may be made of other materials. The parallax barrier 7 is not limited to a film or a plate-like member, and may be composed of other types of members. In the parallax barrier 7, the base material may have a light-reducing property, and an additive having a light-reducing property may be contained in the substrate. The parallax barrier 7 may be configured such that a light-reducing member partially overlaps a light-transmitting substrate. The parallax barrier 7 may have a configuration in which a member having a light-reducing property is added to a part of a light-transmitting substrate.

The parallax barrier 7 may be composed of a liquid crystal shutter. The liquid crystal shutter can control the light transmittance according to the applied voltage. The liquid crystal shutter may be composed of a plurality of pixels and may control the light transmittance in each pixel. The liquid crystal shutter can form a region having a high light transmittance or a region having a low light transmittance in an arbitrary shape. When the parallax barrier 7 is configured by a liquid crystal shutter, the light transmitting region 72 may be a region having a transmittance equal to or higher than the first predetermined value. When the parallax barrier 7 is composed of a liquid crystal shutter, the light reducing surface 71 may be a region having a transmittance equal to or lower than a second predetermined value. The parallax barrier 7 includes a shutter panel that can be changed between a light transmission state and a light reduction state for each minute region. The shutter panel includes a MEMS shutter panel employing a MEMS (Micro Electro Mechanical System) shutter in addition to the liquid crystal shutter.

Thereby, the parallax barrier 7 can be configured to change the light beam direction, which is the propagation direction of the image light emitted from the subpixel, for each of a plurality of strip-like regions extending in the specified direction in the display surface 61. Specifically, the parallax barrier 7 transmits the part of the image light emitted from the display surface 61 through the translucent area 72 so that the image light reaches the position of the left eye of the user. Two optical members 112 can be configured to propagate. The parallax barrier 7 allows the other part of the image light emitted from the display surface 61 to pass through the translucent region 72 so that the image light reaches the position of the right eye of the user. 112 may be configured to propagate. The second optical member 112 can be configured to cause the image light whose light beam direction is defined by the parallax barrier 7 to reach each eye of the user so that a virtual image of the display panel 6 is formed.

Specifically, the image light emitted from the subpixels P1 to P4 included in the left-eye visible region 61L (first visible region) of the display surface 61 shown in FIG. 5 is converted into the parallax barrier 7 and the projection optical system. The user's left eye can be reached via 110. Image light emitted from the sub-pixels P5 to P8 included in the left-eye dimming area 62L, which is an area other than the left-eye visible area 61L, is difficult to be recognized or does not reach the user's left eye. Image light emitted from the sub-pixels P5 to P8 included in the right-eye visible region 61R (second visible region) different from the left-eye visible region 61L on the display surface 61 shown in FIG. Can reach the eyes. Image light emitted from the sub-pixels P1 to P4 included in the right-eye dimming area 62R that is an area other than the right-eye visible area 61R is difficult to be recognized or does not reach the user's right eye. Therefore, as shown in FIG. 7, the user apparently exists as if the second virtual image 700 that is a virtual image of the parallax barrier 7 exists and defines the direction of the image light from the first virtual image 600. Can recognize images. In the present embodiment, the forward direction is the direction of the second optical member 112 as viewed from the user. The front is a direction in which the moving body 100 normally moves.

FIG. 8 is a diagram for explaining the first virtual image 600 visually recognized by the user's left eye. FIG. 9 is a diagram for explaining the first virtual image 600 visually recognized by the user's right eye. In FIG. 8 and FIG. 9, the portion where the first virtual image 600 is not visually recognized due to the image light being blocked by the light reducing surface 71 is indicated by oblique lines, and is hereinafter referred to as a virtual image 701 of the light reducing surface 71. The first virtual image 600 includes a part of virtual image subpixels P′1 to P′8, which are virtual images of the subpixels P1 to P8 on the display surface 61. In the present embodiment, the horizontal length of the virtual image subpixels P′1 to P′8 is VHp, and the vertical length is VVp.

Part of the image light emitted from the display surface 61 can pass through the light-transmitting region 72 of the parallax barrier 7 and be reflected by the projection optical system 110 as described above to reach the left eye. Thereby, as shown in FIG. 8, the user's left eye can visually recognize the virtual image 601L of the left-eye visible region 61L that is part of the first virtual image 600. Image light emitted from the display surface 61 other than the image light reaching the left eye can be reduced by the light reduction surface 71 of the parallax barrier 7. Thereby, ideally, the left eye does not visually recognize the virtual image 602L of the left-eye dimming region 62L that is a region other than the virtual image 601L of the left-eye visible region 61L in the first virtual image 600.

The image light emitted from the display surface 61 and different from the image light reaching the left eye is transmitted through the light-transmitting region 72 of the parallax barrier 7 and is reflected by the projection optical system 110 as described above, so that the right eye. Can be reached. Thereby, as shown in FIG. 9, the user's right eye apparently displays a virtual image 601R of the right eye visible region 61R that is a part of the first virtual image 600 and is different from the virtual image 601L of the left eye visible region 61L. Visible. Image light other than image light that reaches the right eye emitted from the display surface 61 can be dimmed by the dimming surface 71 of the parallax barrier 7. Thereby, the right eye ideally does not visually recognize the virtual image 602R of the right eye dimming region 62R that is a region other than the virtual image 601R of the right eye visible region 61R in the first virtual image 600.

Here, the size and positional relationship of the image pitch k, the barrier pitch Bp, the barrier opening width Bw, and the gap g of the display device 4 will be described. As shown in FIG. 4, the barrier pitch Bp is an arrangement interval of the parallax barrier 7 in the horizontal direction. The barrier opening width Bw is the horizontal length of the translucent region 72. As shown in FIG. 2, the gap g is a distance between the display panel 6 and the parallax barrier 7.

Therefore, first, the relationship between the first virtual image 600, the second virtual image 700, and the appropriate viewing distance VD will be described. The appropriate viewing distance VD is a distance between the second virtual image 700 and the user's eye. For convenience of explanation, the following description will be made with reference to FIG. 7. The actual ratio of the distance between the second virtual image 700 and the user's eye to the distance between the first virtual image 600 and the second virtual image 700 is as follows. The distance ratio shown in FIG. 7 is much larger.

As shown in FIG. 7, the following expressions (1) and (2) are established using the virtual image barrier pitch VBp, the virtual image gap Vg, and the interocular distance E between the right and left eyes of the user. Designed as such. The virtual image barrier pitch VBp is an arrangement interval of the virtual images 701 on the light reducing surface 71 in a direction corresponding to the first direction. The virtual image gap Vg is a distance between the second virtual image 700 and the first virtual image 600. The virtual image pitch Vk is a horizontal arrangement interval between the virtual image of the first subpixel group Pg1 and the virtual image of the second subpixel group Pg2.
E: VD = (Vk / 2): Vg Formula (1)
VD: VBp = (VD + Vg): Vk Formula (2)

The virtual image barrier opening width VBw is appropriately defined based on the appropriate visual distance VD, the virtual image gap Vg, and the virtual image pitch Vk so that the virtual image 601L of the left eye visible region 61L and the virtual image 601R of the right eye visible region 61R do not overlap. . The virtual image barrier opening width VBw is a width corresponding to the width of the light transmitting region 72 in the second virtual image 700.

The image pitch k, barrier pitch Bp, barrier opening width Bw, and gap g in the display device 4 are defined such that the virtual image barrier pitch VBp, virtual image gap Vg, virtual image barrier opening width VBw, and virtual image pitch Vk satisfy the above conditions. Is done. These values are defined in consideration of the performance of the projection optical system 110 and the positional relationship with the display device 4.

The controller 8 is connected to each component of the display device 4 and can be configured to control each component. The controller 8 can be configured as a processor, for example. The controller 8 may include one or more processors. The processor may include a general-purpose processor that reads a specific program and executes a specific function, and a dedicated processor specialized for a specific process. The dedicated processor may include an application specific IC (ASIC: Application Specific Circuit). The processor may include a programmable logic device (PLD: Programmable Logic Device). The PLD may include an FPGA (Field-Programmable Gate Array). The controller 8 may be one of SoC (System-on-a-Chip) in which one or a plurality of processors cooperate and SiP (System-In-a-Package). The controller 8 includes a storage unit, and may store various information or a program for operating each component of the display device 4 in the storage unit. The storage unit may be configured by, for example, a semiconductor memory.

Here, the processing executed by the controller 8 will be described in detail. The controller 8 can be configured to control an image to be displayed on the display panel 6 based on a control signal received by the display device 4 or input to the display device 4 by a user operation. Specifically, the display device 4 can be configured to display a monocular image based on the control signal. The display device 4 may be configured to display at least one of a two-dimensional image and a three-dimensional image in addition to a monocular image. The display device 4 may be operable to switch a display image between a monocular image and a two-dimensional image and / or a three-dimensional image based on a control signal.

First, the control in which the controller 8 displays a monocular image will be described in detail.

The controller 8 displays a black image in a sub-pixel (first sub-pixel) at least partially included in the left-eye visible region 61L that emits image light that passes through the light-transmitting region 72 and reaches the user's left eye. May be operable. The black image is an image having a predetermined luminance such as black. The predetermined luminance can be a value corresponding to the luminance of the lowest gradation among the gradation levels that can be displayed by the subpixel or the luminance of the gradation according to the luminance. The controller 8 causes the observation image to be displayed on the sub-pixel (second sub-pixel) that is at least partially included in the right-eye visible region 61R that emits image light that passes through the light-transmitting region 72 and reaches the right eye. May be operable. The observation image is an image having an arbitrary luminance to be observed by the user's right eye. The first subpixel corresponds to a subpixel included in the first subpixel group Pg1 described above. The second subpixel corresponds to a subpixel included in the above-described second subpixel group Pg2.

Specifically, the controller 8 may be operable to display black images on the sub-pixels P1 to P4 at least partially included in the left-eye visible region 61L as shown in FIG. In the drawing, a symbol “(B)” is attached to subpixels displaying a black image together with symbols P1 to P8. As a result, as shown in FIG. 8, the left eye of the user does not visually recognize or hardly recognize the virtual image at the positions of the virtual image subpixels P′1 to P′4. In the drawing, the symbol “(B)” is attached to the virtual image subpixels corresponding to the subpixels P1 to P8 displaying the black image together with the symbols P′1 to P′8. As described above, the black image has a value corresponding to the luminance of the lowest gradation among the gradation levels that can be displayed by the sub-pixel or the luminance of the gradation according to the luminance. Therefore, actually, when the user sees the direction corresponding to the black image through the second optical member 112, the user only sees an object located on the opposite side of the second optical member 11 from the user. Can be seen. That is, the user does not visually recognize the virtual image at the position corresponding to the sub-pixel displaying the black image. Or, actually, when the user sees the direction corresponding to the black image through the second optical member 112, the user only sees an object located on the opposite side of the second optical member 11 from the user. Is easy to see. That is, it is difficult for the user to visually recognize the virtual image at a position corresponding to the sub-pixel displaying the black image. In the present embodiment, in order to simplify the description, the position corresponding to the sub-pixel displaying the black image is described as the position of the virtual image sub-pixel.

The controller 8 may be operable to display observation images on the sub-pixels P5 to P8 at least partially included in the left-eye dimming area 62L as shown in FIG. As a result, as shown in FIG. 6, the observation image is displayed on the sub-pixels P5 to P8 at least partially included in the right-eye visible region 61R. Therefore, as shown in FIG. 9, the right eye of the user visually recognizes the virtual image of the observation image formed in the virtual image subpixels P′5 to P′8 of the virtual image 601R in the right-eye visible region 61R.

Therefore, the user views the virtual image of the observation image only with the right eye. Alternatively, the user can easily visually recognize the virtual image of the observation image only with the right eye. Therefore, it becomes difficult for the user to recognize the depth direction of the virtual image of the observation image, and it becomes easier to visually recognize the virtual image at the same time as an object far from the virtual image.

At this time, ideally, the left eye of the user does not visually recognize the virtual image of the observation image displayed in the left eye dimming area 62L. However, actually, image light from the left eye dimming area 62 </ b> L of the display surface 61 may leak from the dimming surface 71 of the parallax barrier 7. In this case, the left eye may visually recognize the virtual image of the observation image formed in the virtual image subpixels P′5 to P′8 included in the virtual image 602L of the left eye dimming region 62L. Accordingly, the inventors have found that the left eye sees an observation image that should be seen only by the right eye, and crosstalk occurs. In particular, the inventors have found that the image light from the sub-pixel closer to the left-eye visible region 61L in the left-eye dimming region 62L is more likely to leak from the dimming surface 71. The inventors found that the lower the illuminance of the surrounding environment, the easier it is for the user's left eye to visually recognize the virtual image due to the image light leaking from the left eye dimming region 62L, which greatly affects the occurrence of crosstalk. It was.

Therefore, the controller 8 can be configured to acquire the illuminance measured by the illuminance measuring instrument 2. It may be operable to display a black image on the first subpixel and to control the second subpixel based on the illuminance. Specifically, the controller 8 controls the image to be displayed on a part of the second subpixel at least a part of which is included in the right eye visible region 61R so as to be switchable between the observation image and the black image. May be operable. At this time, the controller 8 may be operable to display an observation image on a sub-pixel that does not display a black image among the second sub-pixels.

In other words, the controller 8 may be operable to control the display state of the display surface 61 so as to be switchable between the first display state and the second display state. The first display state is a state in which the number of subpixels that display a black image is greater than the number of subpixels that display an image for observation in a repeating unit of the first subpixel and the second subpixel. The second display state is a state in which the number of subpixels displaying a black image is the same as the number of subpixels displaying an observation image.

Hereinafter, switching control by the controller 8 will be described in detail.

(When the illuminance is greater than or equal to the first illuminance)
When the illuminance measured by the illuminance measuring instrument 2 is equal to or higher than the first illuminance, the controller 8 may be operable to display a black image on the first subpixel as described above. The first illuminance is the lowest illuminance in the illuminance range in which crosstalk due to leakage of image light from the observation image is considered not to be recognized by the user. The controller 8 may be operable to cause the second subpixel to display an observation image.

(When the illuminance is less than the first illuminance and greater than or equal to the second illuminance)
When the illuminance measured by the illuminance measuring instrument 2 is less than the first illuminance and greater than or equal to the second illuminance lower than the first illuminance, the controller 8 displays the black image on the first subpixel as described above. It may be operable. The second illuminance is lower than the first illuminance. The second illuminance is an illuminance in an illuminance range in which crosstalk due to leakage of image light from the observation image due to leakage of image light of the observation image is considered to be recognized by the user. The second illuminance is the lowest illuminance in an illuminance range in which crosstalk due to leakage of image light from the observation image is not recognized by the user when a part of the observation image is changed to a black image. .

The controller 8 may be operable to display a black image on at least one of the second subpixels in a minimum repeating unit of the first subpixel and the second subpixel. The minimum repeating unit is a minimum unit in which the first sub-pixel and the second sub-pixel are repeatedly arranged, and the sub-pixels P1 to P8 arranged in succession as shown in FIGS. 5 and 6 one by one. It is a range to include.

Specifically, the controller 8 may display a black image on an image to be displayed on a subpixel in contact with the first subpixel among the second subpixels. The controller 8 may display a black image on the sub pixel closest to the left eye visible region 61L among the second sub pixels. When there are a plurality of subpixels closest to the left-eye visible region 61L among the second subpixels, the controller 8 causes the subpixel closer to the right eye to display a black image among the plurality of subpixels. It's okay. When there are a plurality of subpixels closest to the left-eye visible region 61L among the second subpixels, the controller 8 may display a black image on the plurality of subpixels.

In the example shown in FIGS. 5 and 6, the controller 8 may display a black image on the subpixel P5 in addition to the subpixels P1 to P4. As a result, the left eye of the user does not visually recognize the virtual image at the positions of the virtual image subpixels P′1 to P′4, as shown in FIG. Even if image light leaks from the left-eye dimming area 62L at this time, the user's left eye does not visually recognize or is difficult to visually recognize the virtual image at the position of the virtual image subpixel P′5. For this reason, it can be reduced that the virtual image of the observation image is visually recognized by the left eye of the user due to the leakage of the image light of the observation image. Therefore, occurrence of crosstalk can be reduced.

At this time, the controller 8 causes the observation image to be displayed on the sub-pixel that does not display the black image among the second sub-pixels. In the example shown in FIG. 5 and FIG. 6, the controller 8 may display the observation image on the subpixels P6 to P8 among the subpixels P5 to P8. As a result, as shown in FIG. 10, the right eye of the user can visually recognize the virtual image of the observation image formed on the virtual image subpixels P′6 to P′8. The right eye of the user does not visually recognize the virtual image at the position of the virtual image subpixel P′5 or is difficult to visually recognize it. In this case, there is a concern that the visibility may be lowered due to a decrease in the virtual image of the observation image visually recognized by the user's right eye. However, the lower the illuminance of the surrounding environment, the easier it is for the user's eyes to visually recognize the observation image even if the amount of image light is small. For this reason, the fall of the visibility of the virtual image of the image for observation can be reduced.

Furthermore, when the parallax barrier 7 is the liquid crystal shutter described above, the controller 8 may control the parallax barrier 7. Specifically, as shown in FIG. 11, the controller 8 arranges the parallax barrier 7 so that the center of the left eye visible region 61L is positioned at the center in the horizontal direction of the region where the black image is displayed. It's okay. As a result, the subpixel closest to the left-eye visible region 61L that displays the observation image is separated from the left-eye visible region 61L. Therefore, crosstalk due to leakage of the observation image can be further reduced.

(When the illuminance is less than the second illuminance)
When the illuminance measured by the illuminance measuring instrument 2 is less than the second illuminance, the controller 8 may be operable to display a black image on the first sub-pixel as described above. The controller 8 may be operable to display a black image on more subpixels than in the case where the illuminance is greater than or equal to the second illuminance and less than the first illuminance among the second subpixels.

In the example shown in FIGS. 5 and 6, the controller 8 may display black images on the subpixels P5 and P8 in addition to the subpixels P1 to P4. Accordingly, as shown in FIG. 12, the user's left eye does not or does not easily see the virtual image at the positions of the virtual image subpixels P′1 to P′4. Even if image light leaks from the left-eye dimming area 62L at this time, the user's left eye does not visually recognize or hardly recognize the virtual image at the positions of the virtual image subpixels P′5 and P′8. For this reason, it can be further reduced that the virtual image of the observation image is visually recognized by the left eye of the user due to the leakage of the image light of the observation image. Therefore, the occurrence of crosstalk can be further reduced.

At this time, the controller 8 may be operable to display an observation image on a sub-pixel that does not display a black image among the second sub-pixels. For example, in the example shown in FIGS. 5 and 6, the controller 8 may display the observation image on the subpixels P6 and P7 among the subpixels P5 to P8. Thereby, as shown in FIG. 12, the right eye of the user visually recognizes the virtual image of the observation image formed in the virtual image subpixels P′6 and P′7 of the virtual image 602L of the left-eye dimming region 62L. sell. The user's right eye does not visually recognize the virtual image at the positions of the virtual image subpixels P′5 and P′8 or is difficult to visually recognize. In this case, there is a concern that the visibility may be lowered due to a decrease in the virtual image of the observation image visually recognized by the user's right eye. However, the lower the illuminance of the surrounding environment, the easier it is for the user's eyes to visually recognize the image even if the amount of image light is small. For this reason, the fall of the visibility of the virtual image of the image for observation can be reduced.

Next, control for causing the controller 8 to display a two-dimensional image will be described.

When the display device 4 can switch and display a monocular image and a two-dimensional image, the parallax barrier 7 can be configured by a liquid crystal shutter that can be controlled by the controller 8. The controller 8 may be operable to display a two-dimensional image having no parallax on the display panel 6. The controller 8 may be operable to avoid providing the light reducing surface 71 on the parallax barrier 7. Specifically, the controller 8 can be operated so that the transmittance of the liquid crystal shutters constituting the parallax barrier 7 is uniformly equal to the transmittance of the light-transmitting region 72. Thereby, the image light of the two-dimensional image emitted from the display surface 61 can reach both the right eye and the left eye of the user. Therefore, the right eye and the left eye of the user can visually recognize the same two-dimensional image.

Next, control for causing the controller 8 to display a three-dimensional image will be described.

The controller 8 may be operable to display the left eye image on the first subpixel at least partially included in the left eye visible region 61L. The controller 8 may be operable to display the right eye image on the second subpixel at least partially included in the right eye visible region 61R. The left eye image and the right eye image are images having parallax with each other. When the left eye image is visually recognized by the left eye and the right eye image is visually recognized by the right eye, a stereoscopic image can be recognized by the user.

As described above, in the display of the monocular image in the first embodiment, the controller 8 is operable to display the black image on the first subpixel at least partially included in the left eye visible region 61L. It is possible. The controller 8 may be configured to control so that an image to be displayed on a part of the second subpixel at least part of which is included in the right eye visible region 61R can be switched between the observation image and the black image. For this reason, the amount of image light of the observation image that leaks from the dimming surface 71 can be controlled. Therefore, the amount of image light of the observation image transmitted to the user's left eye is controlled, and the observation image that the left eye visually recognizes together with the black image can be reduced. Thereby, the occurrence of crosstalk can be reduced.

In order to reduce the occurrence of crosstalk, it is conceivable to lower the barrier opening ratio, which is the ratio of the barrier opening width Bw to the barrier pitch Bp. However, in order to reduce the barrier aperture ratio, it is necessary to precisely control the parallax barrier 7. Specifically, it is necessary to control the barrier opening width Bw with an accuracy equal to or less than the horizontal length Hp of the subpixel. On the other hand, in the first embodiment, an observation image or a black image may be displayed on any of the second sub-pixels included in the left-eye dimming region 62L, and the barrier opening width As compared with the case where Bw is changed, precise control is not required. Therefore, the occurrence of crosstalk can be easily reduced.

In the first embodiment, the controller 8 can be configured to control an image to be displayed on the second sub-pixel based on the illuminance measured by the illuminance measuring instrument 2. The human eye is more likely to visually recognize the observation image as the illuminance of the surrounding environment is lower. Therefore, by displaying a black image on the second sub-pixel or displaying an ornamental image based on the illuminance, the ornamental image is surely visually recognized by the right eye while appropriately reducing crosstalk. be able to.

In the first embodiment, when the illuminance is less than the first illuminance, the controller 8 sets black to at least one of the second subpixels in the minimum repeating unit of the first subpixel and the second subpixel. Display an image. The controller 8 causes the observation image to be displayed on the sub-pixel that does not display the black image among the second sub-pixels. For this reason, it can be reduced that the virtual image of the observation image is visually recognized by the left eye of the user due to the leakage of the image light of the observation image. Therefore, occurrence of crosstalk can be reduced. Furthermore, the lower the illuminance of the surrounding environment, the easier it is to visually recognize the image even if the amount of image light is small. Therefore, the visibility of the virtual image of the observation image by the right eye decreases even if the amount of image light of the observation image decreases. Can be prevented.

In the first embodiment, the controller 8 displays a black image on the sub-pixel closest to the left-eye visible region 61L among the second sub-pixels. The closer the sub-pixel of the left-eye dimming area 62L is to the left-eye visible area 61L, the easier the image light from the sub-pixel leaks from the dimming surface 71. Therefore, compared with the case where a black image is displayed on the other sub-pixels of the left-eye visible region 61L, it can be further reduced that the virtual image of the observation image is visually recognized by the user's left eye. Therefore, occurrence of crosstalk can be reduced.

In the first embodiment, when the illuminance is less than the second illuminance lower than the first illuminance, the controller 8 is more than the case where the illuminance is greater than or equal to the second illuminance among the second sub-pixels. The sub-pixel may be operable to display a black image. It can be further reduced that the virtual image of the observation image is visually recognized by the left eye of the user due to the leakage of the image light of the observation image. Therefore, the occurrence of crosstalk can be further reduced. The lower the illuminance of the surrounding environment, the easier it is to visually recognize the image even when the amount of image light is small. Therefore, even if the amount of image light of the observation image is reduced, the visibility of the virtual image of the observation image by the right eye is reduced. Can be prevented.

Subsequently, a second embodiment of the present disclosure will be described with reference to the drawings.

The head-up display system 1 according to the second embodiment of the present disclosure includes an illuminance measuring instrument 2 and a head-up display 3 as shown in FIG. The head-up display system 1 according to the second embodiment is different from the first embodiment in that it further includes a detection device 9. In the second embodiment, only the configuration different from the first embodiment will be described. The configuration that is not described in the second embodiment is the same as that of the first embodiment.

The detection device 9 can be configured to detect the position of either the left eye or the right eye of the user and output it to the controller 8. The detection device 9 may include a camera, for example. The detection device 9 may photograph the user's face with a camera. The detection device 9 may detect the position of at least one of the left eye and the right eye from a captured image of the camera. The detection device 9 may detect the position of at least one of the left eye and the right eye as coordinates in a three-dimensional space from a captured image of one camera. The detection device 9 may detect the position of at least one of the left eye and the right eye as coordinates in a three-dimensional space from the captured images of two or more cameras.

Detecting device 9 may not be equipped with a camera and may be connected to a camera outside the device. The detection device 9 may include an input terminal for inputting a signal from a camera outside the device. The camera outside the apparatus may be directly connected to the input terminal. The camera outside the apparatus may be indirectly connected to the input terminal via a shared network. The detection device 9 that does not include a camera may include an input terminal through which the camera inputs a video signal. The detection device 9 that does not include a camera may detect the position of at least one of the left eye and the right eye from the video signal input to the input terminal.

The detection device 9 may include a sensor, for example. The sensor may be an ultrasonic sensor or an optical sensor. The detection device 9 may detect the position of the user's head using a sensor, and may detect the position of at least one of the left eye and the right eye based on the position of the head. The detection device 9 may detect the position of at least one of the left eye and the right eye as coordinates in a three-dimensional space with one or more sensors.

The detection device 9 may detect the movement distance of the left eye and the right eye along the arrangement direction of both eyes based on the detection result of at least one position of the left eye and the right eye.

The head-up display system 1 does not have to include the detection device 9. When the display device 4 does not include the detection device 9, the controller 8 may include an input terminal that inputs a signal from a detection device outside the device. The detection device outside the device may be connected to the input terminal. The detection device outside the device may use an electric signal and an optical signal as a transmission signal for the input terminal. The detection device outside the device may be indirectly connected to the input terminal via a shared network. The controller 8 may receive the position of at least one of the left eye and the right eye acquired from a detection device outside the device.

The controller 8 is configured to determine the positions of the left-eye visible region 61L and the right-eye visible region 61R based on the illuminance measured by the illuminance measuring instrument 2 and the position of the user's eye detected by the detection device 9. Can be done.

When the position of the user's eye is detected by the detection device 9, the controller 8 may determine the positions of the virtual image 601L of the left-eye visible region 61L and the virtual image 601R of the right-eye visible region 61R based on the positions. Then, the controller 8 may determine the positions of the left eye visible region 61L and the right eye visible region 61R based on the positions of the virtual image 601L of the left eye visible region 61L and the virtual image 601R of the right eye visible region 61R.

The method for controlling the image that the controller 8 displays on each sub-pixel based on the illuminance is the same as in the first embodiment. In the first embodiment, the controller 8 includes the second sub sub-dimension 62L including at least a part of the left-eye dimming area 62L based on the position of the left-eye visible area 61L when the user's eyes are at the reference position. It can be configured to control the pixels. In contrast, in the second embodiment, the controller 8 controls the second sub-pixel based on the position of the left-eye visible region 61L determined based on the position of the user's eye detected by the detection device 9. Can be configured to. For this reason, even when the position of the user's eyes is displaced from the reference position, the position of the virtual image 601 in the left-eye visible region 61L is accurately determined. Accordingly, the black image and the observation image can be appropriately displayed for each of the left eye and the right eye of the user based on the position of the left eye visible region 61L.

Although the above-described embodiment has been described as a representative example, it will be apparent to those skilled in the art that many changes and substitutions can be made within the spirit and scope of the present invention. Accordingly, the present invention should not be construed as being limited by the above-described embodiments, and various modifications and changes can be made without departing from the scope of the claims. For example, a plurality of constituent blocks described in the embodiments and examples can be combined into one, or one constituent block can be divided.

In each of the above-described embodiments, the display device 4 includes the parallax barrier 7 as an optical element, but is not limited thereto. For example, the display device 4 may include a lenticular lens as an optical element. In this case, like the parallax barrier 7, the lenticular lens defines the traveling direction of the image light emitted from the subpixels P1 to P4 included in the left-eye visible region 61L, and passes through the projection optical system 110. It is operable to reach the user's left eye. Similar to the parallax barrier 7, the lenticular lens defines the traveling direction of the image light emitted from the sub-pixels P5 to P8 included in the right-eye visible region 61R, and the user's through the projection optical system 110 Operate to reach the right eye.

DESCRIPTION OF

SYMBOLS

1,10 Head-up display system 2 Illuminance measuring device 3 Head-up display 4 Display device 5 Irradiator 6 Display panel 7 Parallax barrier 8 Controller 9 Detection device 61 Display surface 61L Left eye visible region 61R Right eye visible region 62L Left eye reduction Light region 62R Right-eye dimming region 71 Dimming surface 72 Translucent region 100 Moving object 110 Projection optical system 111 First optical member 112 Second optical member 120 Virtual image 600 First virtual image 601L Virtual image 601R in the left-eye visible region Right-eye visible Region virtual image 602L Virtual image 602R in the left eye dimming region Virtual image 700 in the right eye dimming region Second virtual image 701 Virtual image of the dimming surface

Claims

A display surface having a plurality of subpixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction, and having a plurality of strip-like regions extending in a prescribed direction on the display surface; ,
An optical element configured to define a light beam direction of image light emitted from the sub-pixel for each of the plurality of band-shaped regions;
A projection optical system configured to reflect the image light so that a virtual image of an image displayed on the display surface is formed;
A controller configured to control the display surface;
With
The plurality of belt-like regions are
A first visible region configured to emit image light reaching the user's first eye by defining a light beam direction by the optical element;
A second visible region configured to emit image light reaching a second eye different from the first eye of the user by defining a light ray direction by the optical element;
The controller displays a black image on a first sub-pixel at least partly included in the first visible region, and displays an image on a part of a second sub-pixel at least partly included in the second visible region. Is a head-up display that controls switching between an observation image having an arbitrary luminance and the black image.
The controller is
Obtaining the illuminance of the ambient environment of the projection optical system;
The head-up display according to claim 1, wherein the head-up display is configured to control the second sub-pixel based on the illuminance.
When the illuminance is less than the first illuminance, the controller
Displaying the black image on at least one of the second subpixels in a minimum repeating unit of the first subpixel and the second subpixel;
3. The head-up display according to claim 2, wherein the head-up display is operable to display the observation image on a sub-pixel that does not display the black image among the second sub-pixels.
The head-up display according to claim 3, wherein the controller is operable to display the black image on a sub-pixel closest to the first visible region among the second sub-pixels.
When there are a plurality of subpixels closest to the first visible region among the second subpixels, the controller outputs a black image to a subpixel closer to the second eye among the plurality of subpixels. The head-up display of claim 4, operable to display.
The controller is operable to display a black image on the plurality of sub-pixels when there are a plurality of sub-pixels closest to the first visible region among the second sub-pixels. The head-up display described.
When the illuminance is less than the second illuminance lower than the first illuminance, the controller has more than the second subpixel when the illuminance is greater than or equal to the second illuminance and less than the first illuminance. The head-up display according to claim 3, wherein the head-up display is operable to display the black image on the sub-pixels.
The controller is configured to control the optical element such that a center in the first direction of the first visible region is a center in a first direction of a region including the sub-pixel displaying the black image. The head-up display according to any one of claims 1 to 7.
The controller is
Determining the first visible region based on a position of the user's eye;
The head-up display according to claim 8, configured to display a black image on the first sub-pixel and control the second sub-pixel based on the position of the first visible region.
A display surface having a plurality of subpixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction, and having a plurality of strip-like regions extending in a prescribed direction on the display surface; ,
An optical element configured to define a light beam direction of image light emitted from the sub-pixel for each of the plurality of band-shaped regions;
A projection optical system configured to reflect the image light so that a virtual image of an image displayed on the display surface is formed;
A controller configured to control the display surface;
With
The plurality of belt-like regions are
A first visible region configured to emit image light reaching the user's first eye by defining a light beam direction by the optical element;
A second visible region configured to emit image light reaching a second eye different from the first eye of the user by defining a light ray direction by the optical element;
The controller displays a black image on a first sub-pixel at least partly included in the first visible region, and the first sub-pixel among the second sub-pixels at least partly included in the second visible region. A head-up display that controls an image to be displayed on a sub-pixel in contact with a pixel so as to be switchable between an observation image having an arbitrary luminance and the black image.
A display surface having a plurality of subpixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction, and having a plurality of strip-like regions extending in a prescribed direction on the display surface; ,
An optical element configured to define a light beam direction of image light emitted from the sub-pixel for each of the plurality of band-shaped regions;
A projection optical system configured to reflect the image light so that a virtual image of an image displayed on the display surface is formed;
A controller configured to control the display surface;
With
The plurality of belt-like regions are
A first visible region configured to emit image light reaching the user's first eye by defining a light beam direction by the optical element;
A second visible region configured to emit image light reaching a second eye different from the first eye of the user by defining a light ray direction by the optical element;
The controller is configured to display a black image in a repeating unit of a first subpixel at least partly included in the first visible region and a second subpixel at least partly included in the second visible region. A first display state in which the number of pixels is greater than the number of sub-pixels that display the observation image; and the second display state in which the number of sub-pixels that display the black image is the same as the number of sub-pixels that display the observation image A head-up display that can be switched between display states.
An illuminance measuring instrument for measuring illuminance;
A head-up display, and the head-up display comprises:
A display surface having a plurality of subpixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction, and having a plurality of strip-like regions extending in a prescribed direction on the display surface; ,
An optical element configured to define a light beam direction of image light emitted from the sub-pixel for each of the plurality of band-shaped regions;
A projection optical system configured to reflect the image light so that a virtual image of an image displayed on the display surface is formed;
A controller configured to control the display surface;
The plurality of belt-like regions are
A first visible region configured to emit image light reaching the user's first eye by defining a light beam direction by the optical element;
A second visible region configured to emit image light reaching a second eye different from the first eye of the user by defining a light ray direction by the optical element;
The controller displays a black image on a first sub-pixel at least partly included in the first visible region, and displays an image on a part of a second sub-pixel at least partly included in the second visible region. Is controlled to be switchable between an observation image having an arbitrary luminance and the black image.
A head-up display,
The head-up display is
A display surface having a plurality of subpixels arranged in a grid pattern along a first direction and a second direction substantially orthogonal to the first direction, and having a plurality of strip-like regions extending in a prescribed direction on the display surface; ,
An optical element configured to define a light beam direction of image light emitted from the sub-pixel for each of the plurality of band-shaped regions;
A projection optical system configured to reflect the image light so that a virtual image of an image displayed on the display surface is formed;
A controller configured to control the display surface;
The plurality of belt-like regions are
A first visible region configured to emit image light reaching the user's first eye by defining a light beam direction by the optical element;
A second visible region configured to emit image light reaching a second eye different from the first eye of the user by defining a light ray direction by the optical element;
The controller displays a black image on a first sub-pixel at least partly included in the first visible region, and displays an image on a part of a second sub-pixel at least partly included in the second visible region. Is controlled to be switchable between an observation image having an arbitrary luminance and the black image.